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perf bpf: Move perf_event_output() from stdio.h to bpf.h
[linux/fpc-iii.git] / fs / nfs / nfs4proc.c
blob867457d6dfbe54060ae6f152ca2a07dfa605ff71
1 /*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/mm.h>
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
57 #include <linux/iversion.h>
58
59 #include "nfs4_fs.h"
60 #include "delegation.h"
61 #include "internal.h"
62 #include "iostat.h"
63 #include "callback.h"
64 #include "pnfs.h"
65 #include "netns.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
68 #include "fscache.h"
69
70 #include "nfs4trace.h"
71
72 #define NFSDBG_FACILITY NFSDBG_PROC
73
74 #define NFS4_BITMASK_SZ 3
75
76 #define NFS4_POLL_RETRY_MIN (HZ/10)
77 #define NFS4_POLL_RETRY_MAX (15*HZ)
78
79 /* file attributes which can be mapped to nfs attributes */
80 #define NFS4_VALID_ATTRS (ATTR_MODE \
81 | ATTR_UID \
82 | ATTR_GID \
83 | ATTR_SIZE \
84 | ATTR_ATIME \
85 | ATTR_MTIME \
86 | ATTR_CTIME \
87 | ATTR_ATIME_SET \
88 | ATTR_MTIME_SET)
89
90 struct nfs4_opendata;
91 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
92 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
93 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
94 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label, struct inode *inode);
95 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label, struct inode *inode);
96 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
97 struct nfs_fattr *fattr, struct iattr *sattr,
98 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
99 struct nfs4_label *olabel);
100 #ifdef CONFIG_NFS_V4_1
101 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
102 struct rpc_cred *cred,
103 struct nfs4_slot *slot,
104 bool is_privileged);
105 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
106 struct rpc_cred *);
107 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
108 struct rpc_cred *, bool);
109 #endif
110
111 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
112 static inline struct nfs4_label *
113 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
114 struct iattr *sattr, struct nfs4_label *label)
115 {
116 int err;
117
118 if (label == NULL)
119 return NULL;
120
121 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
122 return NULL;
123
124 err = security_dentry_init_security(dentry, sattr->ia_mode,
125 &dentry->d_name, (void **)&label->label, &label->len);
126 if (err == 0)
127 return label;
128
129 return NULL;
130 }
131 static inline void
132 nfs4_label_release_security(struct nfs4_label *label)
133 {
134 if (label)
135 security_release_secctx(label->label, label->len);
136 }
137 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 {
139 if (label)
140 return server->attr_bitmask;
141
142 return server->attr_bitmask_nl;
143 }
144 #else
145 static inline struct nfs4_label *
146 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
147 struct iattr *sattr, struct nfs4_label *l)
148 { return NULL; }
149 static inline void
150 nfs4_label_release_security(struct nfs4_label *label)
151 { return; }
152 static inline u32 *
153 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
154 { return server->attr_bitmask; }
155 #endif
156
157 /* Prevent leaks of NFSv4 errors into userland */
158 static int nfs4_map_errors(int err)
159 {
160 if (err >= -1000)
161 return err;
162 switch (err) {
163 case -NFS4ERR_RESOURCE:
164 case -NFS4ERR_LAYOUTTRYLATER:
165 case -NFS4ERR_RECALLCONFLICT:
166 return -EREMOTEIO;
167 case -NFS4ERR_WRONGSEC:
168 case -NFS4ERR_WRONG_CRED:
169 return -EPERM;
170 case -NFS4ERR_BADOWNER:
171 case -NFS4ERR_BADNAME:
172 return -EINVAL;
173 case -NFS4ERR_SHARE_DENIED:
174 return -EACCES;
175 case -NFS4ERR_MINOR_VERS_MISMATCH:
176 return -EPROTONOSUPPORT;
177 case -NFS4ERR_FILE_OPEN:
178 return -EBUSY;
179 default:
180 dprintk("%s could not handle NFSv4 error %d\n",
181 __func__, -err);
182 break;
183 }
184 return -EIO;
185 }
186
187 /*
188 * This is our standard bitmap for GETATTR requests.
189 */
190 const u32 nfs4_fattr_bitmap[3] = {
191 FATTR4_WORD0_TYPE
192 | FATTR4_WORD0_CHANGE
193 | FATTR4_WORD0_SIZE
194 | FATTR4_WORD0_FSID
195 | FATTR4_WORD0_FILEID,
196 FATTR4_WORD1_MODE
197 | FATTR4_WORD1_NUMLINKS
198 | FATTR4_WORD1_OWNER
199 | FATTR4_WORD1_OWNER_GROUP
200 | FATTR4_WORD1_RAWDEV
201 | FATTR4_WORD1_SPACE_USED
202 | FATTR4_WORD1_TIME_ACCESS
203 | FATTR4_WORD1_TIME_METADATA
204 | FATTR4_WORD1_TIME_MODIFY
205 | FATTR4_WORD1_MOUNTED_ON_FILEID,
206 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
207 FATTR4_WORD2_SECURITY_LABEL
208 #endif
209 };
210
211 static const u32 nfs4_pnfs_open_bitmap[3] = {
212 FATTR4_WORD0_TYPE
213 | FATTR4_WORD0_CHANGE
214 | FATTR4_WORD0_SIZE
215 | FATTR4_WORD0_FSID
216 | FATTR4_WORD0_FILEID,
217 FATTR4_WORD1_MODE
218 | FATTR4_WORD1_NUMLINKS
219 | FATTR4_WORD1_OWNER
220 | FATTR4_WORD1_OWNER_GROUP
221 | FATTR4_WORD1_RAWDEV
222 | FATTR4_WORD1_SPACE_USED
223 | FATTR4_WORD1_TIME_ACCESS
224 | FATTR4_WORD1_TIME_METADATA
225 | FATTR4_WORD1_TIME_MODIFY,
226 FATTR4_WORD2_MDSTHRESHOLD
227 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
228 | FATTR4_WORD2_SECURITY_LABEL
229 #endif
230 };
231
232 static const u32 nfs4_open_noattr_bitmap[3] = {
233 FATTR4_WORD0_TYPE
234 | FATTR4_WORD0_FILEID,
235 };
236
237 const u32 nfs4_statfs_bitmap[3] = {
238 FATTR4_WORD0_FILES_AVAIL
239 | FATTR4_WORD0_FILES_FREE
240 | FATTR4_WORD0_FILES_TOTAL,
241 FATTR4_WORD1_SPACE_AVAIL
242 | FATTR4_WORD1_SPACE_FREE
243 | FATTR4_WORD1_SPACE_TOTAL
244 };
245
246 const u32 nfs4_pathconf_bitmap[3] = {
247 FATTR4_WORD0_MAXLINK
248 | FATTR4_WORD0_MAXNAME,
249 0
250 };
251
252 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
253 | FATTR4_WORD0_MAXREAD
254 | FATTR4_WORD0_MAXWRITE
255 | FATTR4_WORD0_LEASE_TIME,
256 FATTR4_WORD1_TIME_DELTA
257 | FATTR4_WORD1_FS_LAYOUT_TYPES,
258 FATTR4_WORD2_LAYOUT_BLKSIZE
259 | FATTR4_WORD2_CLONE_BLKSIZE
260 };
261
262 const u32 nfs4_fs_locations_bitmap[3] = {
263 FATTR4_WORD0_CHANGE
264 | FATTR4_WORD0_SIZE
265 | FATTR4_WORD0_FSID
266 | FATTR4_WORD0_FILEID
267 | FATTR4_WORD0_FS_LOCATIONS,
268 FATTR4_WORD1_OWNER
269 | FATTR4_WORD1_OWNER_GROUP
270 | FATTR4_WORD1_RAWDEV
271 | FATTR4_WORD1_SPACE_USED
272 | FATTR4_WORD1_TIME_ACCESS
273 | FATTR4_WORD1_TIME_METADATA
274 | FATTR4_WORD1_TIME_MODIFY
275 | FATTR4_WORD1_MOUNTED_ON_FILEID,
276 };
277
278 static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src,
279 struct inode *inode)
280 {
281 unsigned long cache_validity;
282
283 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst));
284 if (!inode || !nfs4_have_delegation(inode, FMODE_READ))
285 return;
286
287 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
288 if (!(cache_validity & NFS_INO_REVAL_FORCED))
289 cache_validity &= ~(NFS_INO_INVALID_CHANGE
290 | NFS_INO_INVALID_SIZE);
291
292 if (!(cache_validity & NFS_INO_INVALID_SIZE))
293 dst[0] &= ~FATTR4_WORD0_SIZE;
294
295 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
296 dst[0] &= ~FATTR4_WORD0_CHANGE;
297 }
298
299 static void nfs4_bitmap_copy_adjust_setattr(__u32 *dst,
300 const __u32 *src, struct inode *inode)
301 {
302 nfs4_bitmap_copy_adjust(dst, src, inode);
303 }
304
305 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
306 struct nfs4_readdir_arg *readdir)
307 {
308 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
309 __be32 *start, *p;
310
311 if (cookie > 2) {
312 readdir->cookie = cookie;
313 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
314 return;
315 }
316
317 readdir->cookie = 0;
318 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
319 if (cookie == 2)
320 return;
321
322 /*
323 * NFSv4 servers do not return entries for '.' and '..'
324 * Therefore, we fake these entries here. We let '.'
325 * have cookie 0 and '..' have cookie 1. Note that
326 * when talking to the server, we always send cookie 0
327 * instead of 1 or 2.
328 */
329 start = p = kmap_atomic(*readdir->pages);
330
331 if (cookie == 0) {
332 *p++ = xdr_one; /* next */
333 *p++ = xdr_zero; /* cookie, first word */
334 *p++ = xdr_one; /* cookie, second word */
335 *p++ = xdr_one; /* entry len */
336 memcpy(p, ".\0\0\0", 4); /* entry */
337 p++;
338 *p++ = xdr_one; /* bitmap length */
339 *p++ = htonl(attrs); /* bitmap */
340 *p++ = htonl(12); /* attribute buffer length */
341 *p++ = htonl(NF4DIR);
342 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
343 }
344
345 *p++ = xdr_one; /* next */
346 *p++ = xdr_zero; /* cookie, first word */
347 *p++ = xdr_two; /* cookie, second word */
348 *p++ = xdr_two; /* entry len */
349 memcpy(p, "..\0\0", 4); /* entry */
350 p++;
351 *p++ = xdr_one; /* bitmap length */
352 *p++ = htonl(attrs); /* bitmap */
353 *p++ = htonl(12); /* attribute buffer length */
354 *p++ = htonl(NF4DIR);
355 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
356
357 readdir->pgbase = (char *)p - (char *)start;
358 readdir->count -= readdir->pgbase;
359 kunmap_atomic(start);
360 }
361
362 static void nfs4_test_and_free_stateid(struct nfs_server *server,
363 nfs4_stateid *stateid,
364 struct rpc_cred *cred)
365 {
366 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
367
368 ops->test_and_free_expired(server, stateid, cred);
369 }
370
371 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
372 nfs4_stateid *stateid,
373 struct rpc_cred *cred)
374 {
375 stateid->type = NFS4_REVOKED_STATEID_TYPE;
376 nfs4_test_and_free_stateid(server, stateid, cred);
377 }
378
379 static void nfs4_free_revoked_stateid(struct nfs_server *server,
380 const nfs4_stateid *stateid,
381 struct rpc_cred *cred)
382 {
383 nfs4_stateid tmp;
384
385 nfs4_stateid_copy(&tmp, stateid);
386 __nfs4_free_revoked_stateid(server, &tmp, cred);
387 }
388
389 static long nfs4_update_delay(long *timeout)
390 {
391 long ret;
392 if (!timeout)
393 return NFS4_POLL_RETRY_MAX;
394 if (*timeout <= 0)
395 *timeout = NFS4_POLL_RETRY_MIN;
396 if (*timeout > NFS4_POLL_RETRY_MAX)
397 *timeout = NFS4_POLL_RETRY_MAX;
398 ret = *timeout;
399 *timeout <<= 1;
400 return ret;
401 }
402
403 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
404 {
405 int res = 0;
406
407 might_sleep();
408
409 freezable_schedule_timeout_killable_unsafe(
410 nfs4_update_delay(timeout));
411 if (fatal_signal_pending(current))
412 res = -ERESTARTSYS;
413 return res;
414 }
415
416 /* This is the error handling routine for processes that are allowed
417 * to sleep.
418 */
419 static int nfs4_do_handle_exception(struct nfs_server *server,
420 int errorcode, struct nfs4_exception *exception)
421 {
422 struct nfs_client *clp = server->nfs_client;
423 struct nfs4_state *state = exception->state;
424 const nfs4_stateid *stateid = exception->stateid;
425 struct inode *inode = exception->inode;
426 int ret = errorcode;
427
428 exception->delay = 0;
429 exception->recovering = 0;
430 exception->retry = 0;
431
432 if (stateid == NULL && state != NULL)
433 stateid = &state->stateid;
434
435 switch(errorcode) {
436 case 0:
437 return 0;
438 case -NFS4ERR_BADHANDLE:
439 case -ESTALE:
440 if (inode != NULL && S_ISREG(inode->i_mode))
441 pnfs_destroy_layout(NFS_I(inode));
442 break;
443 case -NFS4ERR_DELEG_REVOKED:
444 case -NFS4ERR_ADMIN_REVOKED:
445 case -NFS4ERR_EXPIRED:
446 case -NFS4ERR_BAD_STATEID:
447 if (inode != NULL && stateid != NULL) {
448 nfs_inode_find_state_and_recover(inode,
449 stateid);
450 goto wait_on_recovery;
451 }
452 /* Fall through */
453 case -NFS4ERR_OPENMODE:
454 if (inode) {
455 int err;
456
457 err = nfs_async_inode_return_delegation(inode,
458 stateid);
459 if (err == 0)
460 goto wait_on_recovery;
461 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
462 exception->retry = 1;
463 break;
464 }
465 }
466 if (state == NULL)
467 break;
468 ret = nfs4_schedule_stateid_recovery(server, state);
469 if (ret < 0)
470 break;
471 goto wait_on_recovery;
472 case -NFS4ERR_STALE_STATEID:
473 case -NFS4ERR_STALE_CLIENTID:
474 nfs4_schedule_lease_recovery(clp);
475 goto wait_on_recovery;
476 case -NFS4ERR_MOVED:
477 ret = nfs4_schedule_migration_recovery(server);
478 if (ret < 0)
479 break;
480 goto wait_on_recovery;
481 case -NFS4ERR_LEASE_MOVED:
482 nfs4_schedule_lease_moved_recovery(clp);
483 goto wait_on_recovery;
484 #if defined(CONFIG_NFS_V4_1)
485 case -NFS4ERR_BADSESSION:
486 case -NFS4ERR_BADSLOT:
487 case -NFS4ERR_BAD_HIGH_SLOT:
488 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
489 case -NFS4ERR_DEADSESSION:
490 case -NFS4ERR_SEQ_FALSE_RETRY:
491 case -NFS4ERR_SEQ_MISORDERED:
492 dprintk("%s ERROR: %d Reset session\n", __func__,
493 errorcode);
494 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
495 goto wait_on_recovery;
496 #endif /* defined(CONFIG_NFS_V4_1) */
497 case -NFS4ERR_FILE_OPEN:
498 if (exception->timeout > HZ) {
499 /* We have retried a decent amount, time to
500 * fail
501 */
502 ret = -EBUSY;
503 break;
504 }
505 /* Fall through */
506 case -NFS4ERR_DELAY:
507 nfs_inc_server_stats(server, NFSIOS_DELAY);
508 /* Fall through */
509 case -NFS4ERR_GRACE:
510 case -NFS4ERR_LAYOUTTRYLATER:
511 case -NFS4ERR_RECALLCONFLICT:
512 exception->delay = 1;
513 return 0;
514
515 case -NFS4ERR_RETRY_UNCACHED_REP:
516 case -NFS4ERR_OLD_STATEID:
517 exception->retry = 1;
518 break;
519 case -NFS4ERR_BADOWNER:
520 /* The following works around a Linux server bug! */
521 case -NFS4ERR_BADNAME:
522 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
523 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
524 exception->retry = 1;
525 printk(KERN_WARNING "NFS: v4 server %s "
526 "does not accept raw "
527 "uid/gids. "
528 "Reenabling the idmapper.\n",
529 server->nfs_client->cl_hostname);
530 }
531 }
532 /* We failed to handle the error */
533 return nfs4_map_errors(ret);
534 wait_on_recovery:
535 exception->recovering = 1;
536 return 0;
537 }
538
539 /* This is the error handling routine for processes that are allowed
540 * to sleep.
541 */
542 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
543 {
544 struct nfs_client *clp = server->nfs_client;
545 int ret;
546
547 ret = nfs4_do_handle_exception(server, errorcode, exception);
548 if (exception->delay) {
549 ret = nfs4_delay(server->client, &exception->timeout);
550 goto out_retry;
551 }
552 if (exception->recovering) {
553 ret = nfs4_wait_clnt_recover(clp);
554 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
555 return -EIO;
556 goto out_retry;
557 }
558 return ret;
559 out_retry:
560 if (ret == 0)
561 exception->retry = 1;
562 return ret;
563 }
564
565 static int
566 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
567 int errorcode, struct nfs4_exception *exception)
568 {
569 struct nfs_client *clp = server->nfs_client;
570 int ret;
571
572 ret = nfs4_do_handle_exception(server, errorcode, exception);
573 if (exception->delay) {
574 rpc_delay(task, nfs4_update_delay(&exception->timeout));
575 goto out_retry;
576 }
577 if (exception->recovering) {
578 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
579 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
580 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
581 goto out_retry;
582 }
583 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
584 ret = -EIO;
585 return ret;
586 out_retry:
587 if (ret == 0) {
588 exception->retry = 1;
589 /*
590 * For NFS4ERR_MOVED, the client transport will need to
591 * be recomputed after migration recovery has completed.
592 */
593 if (errorcode == -NFS4ERR_MOVED)
594 rpc_task_release_transport(task);
595 }
596 return ret;
597 }
598
599 int
600 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
601 struct nfs4_state *state, long *timeout)
602 {
603 struct nfs4_exception exception = {
604 .state = state,
605 };
606
607 if (task->tk_status >= 0)
608 return 0;
609 if (timeout)
610 exception.timeout = *timeout;
611 task->tk_status = nfs4_async_handle_exception(task, server,
612 task->tk_status,
613 &exception);
614 if (exception.delay && timeout)
615 *timeout = exception.timeout;
616 if (exception.retry)
617 return -EAGAIN;
618 return 0;
619 }
620
621 /*
622 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
623 * or 'false' otherwise.
624 */
625 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
626 {
627 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
628 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
629 }
630
631 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
632 {
633 spin_lock(&clp->cl_lock);
634 if (time_before(clp->cl_last_renewal,timestamp))
635 clp->cl_last_renewal = timestamp;
636 spin_unlock(&clp->cl_lock);
637 }
638
639 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
640 {
641 struct nfs_client *clp = server->nfs_client;
642
643 if (!nfs4_has_session(clp))
644 do_renew_lease(clp, timestamp);
645 }
646
647 struct nfs4_call_sync_data {
648 const struct nfs_server *seq_server;
649 struct nfs4_sequence_args *seq_args;
650 struct nfs4_sequence_res *seq_res;
651 };
652
653 void nfs4_init_sequence(struct nfs4_sequence_args *args,
654 struct nfs4_sequence_res *res, int cache_reply,
655 int privileged)
656 {
657 args->sa_slot = NULL;
658 args->sa_cache_this = cache_reply;
659 args->sa_privileged = privileged;
660
661 res->sr_slot = NULL;
662 }
663
664 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
665 {
666 struct nfs4_slot *slot = res->sr_slot;
667 struct nfs4_slot_table *tbl;
668
669 tbl = slot->table;
670 spin_lock(&tbl->slot_tbl_lock);
671 if (!nfs41_wake_and_assign_slot(tbl, slot))
672 nfs4_free_slot(tbl, slot);
673 spin_unlock(&tbl->slot_tbl_lock);
674
675 res->sr_slot = NULL;
676 }
677
678 static int nfs40_sequence_done(struct rpc_task *task,
679 struct nfs4_sequence_res *res)
680 {
681 if (res->sr_slot != NULL)
682 nfs40_sequence_free_slot(res);
683 return 1;
684 }
685
686 #if defined(CONFIG_NFS_V4_1)
687
688 static void nfs41_release_slot(struct nfs4_slot *slot)
689 {
690 struct nfs4_session *session;
691 struct nfs4_slot_table *tbl;
692 bool send_new_highest_used_slotid = false;
693
694 if (!slot)
695 return;
696 tbl = slot->table;
697 session = tbl->session;
698
699 /* Bump the slot sequence number */
700 if (slot->seq_done)
701 slot->seq_nr++;
702 slot->seq_done = 0;
703
704 spin_lock(&tbl->slot_tbl_lock);
705 /* Be nice to the server: try to ensure that the last transmitted
706 * value for highest_user_slotid <= target_highest_slotid
707 */
708 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
709 send_new_highest_used_slotid = true;
710
711 if (nfs41_wake_and_assign_slot(tbl, slot)) {
712 send_new_highest_used_slotid = false;
713 goto out_unlock;
714 }
715 nfs4_free_slot(tbl, slot);
716
717 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
718 send_new_highest_used_slotid = false;
719 out_unlock:
720 spin_unlock(&tbl->slot_tbl_lock);
721 if (send_new_highest_used_slotid)
722 nfs41_notify_server(session->clp);
723 if (waitqueue_active(&tbl->slot_waitq))
724 wake_up_all(&tbl->slot_waitq);
725 }
726
727 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
728 {
729 nfs41_release_slot(res->sr_slot);
730 res->sr_slot = NULL;
731 }
732
733 static int nfs41_sequence_process(struct rpc_task *task,
734 struct nfs4_sequence_res *res)
735 {
736 struct nfs4_session *session;
737 struct nfs4_slot *slot = res->sr_slot;
738 struct nfs_client *clp;
739 bool interrupted = false;
740 int ret = 1;
741
742 if (slot == NULL)
743 goto out_noaction;
744 /* don't increment the sequence number if the task wasn't sent */
745 if (!RPC_WAS_SENT(task))
746 goto out;
747
748 session = slot->table->session;
749
750 if (slot->interrupted) {
751 if (res->sr_status != -NFS4ERR_DELAY)
752 slot->interrupted = 0;
753 interrupted = true;
754 }
755
756 trace_nfs4_sequence_done(session, res);
757 /* Check the SEQUENCE operation status */
758 switch (res->sr_status) {
759 case 0:
760 /* Update the slot's sequence and clientid lease timer */
761 slot->seq_done = 1;
762 clp = session->clp;
763 do_renew_lease(clp, res->sr_timestamp);
764 /* Check sequence flags */
765 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
766 !!slot->privileged);
767 nfs41_update_target_slotid(slot->table, slot, res);
768 break;
769 case 1:
770 /*
771 * sr_status remains 1 if an RPC level error occurred.
772 * The server may or may not have processed the sequence
773 * operation..
774 * Mark the slot as having hosted an interrupted RPC call.
775 */
776 slot->interrupted = 1;
777 goto out;
778 case -NFS4ERR_DELAY:
779 /* The server detected a resend of the RPC call and
780 * returned NFS4ERR_DELAY as per Section 2.10.6.2
781 * of RFC5661.
782 */
783 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
784 __func__,
785 slot->slot_nr,
786 slot->seq_nr);
787 goto out_retry;
788 case -NFS4ERR_RETRY_UNCACHED_REP:
789 case -NFS4ERR_SEQ_FALSE_RETRY:
790 /*
791 * The server thinks we tried to replay a request.
792 * Retry the call after bumping the sequence ID.
793 */
794 goto retry_new_seq;
795 case -NFS4ERR_BADSLOT:
796 /*
797 * The slot id we used was probably retired. Try again
798 * using a different slot id.
799 */
800 if (slot->slot_nr < slot->table->target_highest_slotid)
801 goto session_recover;
802 goto retry_nowait;
803 case -NFS4ERR_SEQ_MISORDERED:
804 /*
805 * Was the last operation on this sequence interrupted?
806 * If so, retry after bumping the sequence number.
807 */
808 if (interrupted)
809 goto retry_new_seq;
810 /*
811 * Could this slot have been previously retired?
812 * If so, then the server may be expecting seq_nr = 1!
813 */
814 if (slot->seq_nr != 1) {
815 slot->seq_nr = 1;
816 goto retry_nowait;
817 }
818 goto session_recover;
819 default:
820 /* Just update the slot sequence no. */
821 slot->seq_done = 1;
822 }
823 out:
824 /* The session may be reset by one of the error handlers. */
825 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
826 out_noaction:
827 return ret;
828 session_recover:
829 nfs4_schedule_session_recovery(session, res->sr_status);
830 goto retry_nowait;
831 retry_new_seq:
832 ++slot->seq_nr;
833 retry_nowait:
834 if (rpc_restart_call_prepare(task)) {
835 nfs41_sequence_free_slot(res);
836 task->tk_status = 0;
837 ret = 0;
838 }
839 goto out;
840 out_retry:
841 if (!rpc_restart_call(task))
842 goto out;
843 rpc_delay(task, NFS4_POLL_RETRY_MAX);
844 return 0;
845 }
846
847 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
848 {
849 if (!nfs41_sequence_process(task, res))
850 return 0;
851 if (res->sr_slot != NULL)
852 nfs41_sequence_free_slot(res);
853 return 1;
854
855 }
856 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
857
858 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
859 {
860 if (res->sr_slot == NULL)
861 return 1;
862 if (res->sr_slot->table->session != NULL)
863 return nfs41_sequence_process(task, res);
864 return nfs40_sequence_done(task, res);
865 }
866
867 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
868 {
869 if (res->sr_slot != NULL) {
870 if (res->sr_slot->table->session != NULL)
871 nfs41_sequence_free_slot(res);
872 else
873 nfs40_sequence_free_slot(res);
874 }
875 }
876
877 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
878 {
879 if (res->sr_slot == NULL)
880 return 1;
881 if (!res->sr_slot->table->session)
882 return nfs40_sequence_done(task, res);
883 return nfs41_sequence_done(task, res);
884 }
885 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
886
887 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
888 {
889 struct nfs4_call_sync_data *data = calldata;
890
891 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
892
893 nfs4_setup_sequence(data->seq_server->nfs_client,
894 data->seq_args, data->seq_res, task);
895 }
896
897 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
898 {
899 struct nfs4_call_sync_data *data = calldata;
900
901 nfs41_sequence_done(task, data->seq_res);
902 }
903
904 static const struct rpc_call_ops nfs41_call_sync_ops = {
905 .rpc_call_prepare = nfs41_call_sync_prepare,
906 .rpc_call_done = nfs41_call_sync_done,
907 };
908
909 static void
910 nfs4_sequence_process_interrupted(struct nfs_client *client,
911 struct nfs4_slot *slot, struct rpc_cred *cred)
912 {
913 struct rpc_task *task;
914
915 task = _nfs41_proc_sequence(client, cred, slot, true);
916 if (!IS_ERR(task))
917 rpc_put_task_async(task);
918 }
919
920 #else /* !CONFIG_NFS_V4_1 */
921
922 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
923 {
924 return nfs40_sequence_done(task, res);
925 }
926
927 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
928 {
929 if (res->sr_slot != NULL)
930 nfs40_sequence_free_slot(res);
931 }
932
933 int nfs4_sequence_done(struct rpc_task *task,
934 struct nfs4_sequence_res *res)
935 {
936 return nfs40_sequence_done(task, res);
937 }
938 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
939
940 static void
941 nfs4_sequence_process_interrupted(struct nfs_client *client,
942 struct nfs4_slot *slot, struct rpc_cred *cred)
943 {
944 WARN_ON_ONCE(1);
945 slot->interrupted = 0;
946 }
947
948 #endif /* !CONFIG_NFS_V4_1 */
949
950 static
951 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
952 struct nfs4_sequence_res *res,
953 struct nfs4_slot *slot)
954 {
955 if (!slot)
956 return;
957 slot->privileged = args->sa_privileged ? 1 : 0;
958 args->sa_slot = slot;
959
960 res->sr_slot = slot;
961 res->sr_timestamp = jiffies;
962 res->sr_status_flags = 0;
963 res->sr_status = 1;
964
965 }
966
967 int nfs4_setup_sequence(struct nfs_client *client,
968 struct nfs4_sequence_args *args,
969 struct nfs4_sequence_res *res,
970 struct rpc_task *task)
971 {
972 struct nfs4_session *session = nfs4_get_session(client);
973 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
974 struct nfs4_slot *slot;
975
976 /* slot already allocated? */
977 if (res->sr_slot != NULL)
978 goto out_start;
979
980 if (session) {
981 tbl = &session->fc_slot_table;
982 task->tk_timeout = 0;
983 }
984
985 for (;;) {
986 spin_lock(&tbl->slot_tbl_lock);
987 /* The state manager will wait until the slot table is empty */
988 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
989 goto out_sleep;
990
991 slot = nfs4_alloc_slot(tbl);
992 if (IS_ERR(slot)) {
993 /* Try again in 1/4 second */
994 if (slot == ERR_PTR(-ENOMEM))
995 task->tk_timeout = HZ >> 2;
996 goto out_sleep;
997 }
998 spin_unlock(&tbl->slot_tbl_lock);
999
1000 if (likely(!slot->interrupted))
1001 break;
1002 nfs4_sequence_process_interrupted(client,
1003 slot, task->tk_msg.rpc_cred);
1004 }
1005
1006 nfs4_sequence_attach_slot(args, res, slot);
1007
1008 trace_nfs4_setup_sequence(session, args);
1009 out_start:
1010 rpc_call_start(task);
1011 return 0;
1012
1013 out_sleep:
1014 if (args->sa_privileged)
1015 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
1016 NULL, RPC_PRIORITY_PRIVILEGED);
1017 else
1018 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
1019 spin_unlock(&tbl->slot_tbl_lock);
1020 return -EAGAIN;
1021 }
1022 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
1023
1024 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1025 {
1026 struct nfs4_call_sync_data *data = calldata;
1027 nfs4_setup_sequence(data->seq_server->nfs_client,
1028 data->seq_args, data->seq_res, task);
1029 }
1030
1031 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1032 {
1033 struct nfs4_call_sync_data *data = calldata;
1034 nfs4_sequence_done(task, data->seq_res);
1035 }
1036
1037 static const struct rpc_call_ops nfs40_call_sync_ops = {
1038 .rpc_call_prepare = nfs40_call_sync_prepare,
1039 .rpc_call_done = nfs40_call_sync_done,
1040 };
1041
1042 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1043 struct nfs_server *server,
1044 struct rpc_message *msg,
1045 struct nfs4_sequence_args *args,
1046 struct nfs4_sequence_res *res)
1047 {
1048 int ret;
1049 struct rpc_task *task;
1050 struct nfs_client *clp = server->nfs_client;
1051 struct nfs4_call_sync_data data = {
1052 .seq_server = server,
1053 .seq_args = args,
1054 .seq_res = res,
1055 };
1056 struct rpc_task_setup task_setup = {
1057 .rpc_client = clnt,
1058 .rpc_message = msg,
1059 .callback_ops = clp->cl_mvops->call_sync_ops,
1060 .callback_data = &data
1061 };
1062
1063 task = rpc_run_task(&task_setup);
1064 if (IS_ERR(task))
1065 ret = PTR_ERR(task);
1066 else {
1067 ret = task->tk_status;
1068 rpc_put_task(task);
1069 }
1070 return ret;
1071 }
1072
1073 int nfs4_call_sync(struct rpc_clnt *clnt,
1074 struct nfs_server *server,
1075 struct rpc_message *msg,
1076 struct nfs4_sequence_args *args,
1077 struct nfs4_sequence_res *res,
1078 int cache_reply)
1079 {
1080 nfs4_init_sequence(args, res, cache_reply, 0);
1081 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1082 }
1083
1084 static void
1085 nfs4_inc_nlink_locked(struct inode *inode)
1086 {
1087 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1088 inc_nlink(inode);
1089 }
1090
1091 static void
1092 nfs4_dec_nlink_locked(struct inode *inode)
1093 {
1094 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_OTHER;
1095 drop_nlink(inode);
1096 }
1097
1098 static void
1099 update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo,
1100 unsigned long timestamp, unsigned long cache_validity)
1101 {
1102 struct nfs_inode *nfsi = NFS_I(dir);
1103
1104 nfsi->cache_validity |= NFS_INO_INVALID_CTIME
1105 | NFS_INO_INVALID_MTIME
1106 | NFS_INO_INVALID_DATA
1107 | cache_validity;
1108 if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) {
1109 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1110 nfsi->attrtimeo_timestamp = jiffies;
1111 } else {
1112 nfs_force_lookup_revalidate(dir);
1113 if (cinfo->before != inode_peek_iversion_raw(dir))
1114 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1115 NFS_INO_INVALID_ACL;
1116 }
1117 inode_set_iversion_raw(dir, cinfo->after);
1118 nfsi->read_cache_jiffies = timestamp;
1119 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1120 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE;
1121 nfs_fscache_invalidate(dir);
1122 }
1123
1124 static void
1125 update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1126 unsigned long timestamp, unsigned long cache_validity)
1127 {
1128 spin_lock(&dir->i_lock);
1129 update_changeattr_locked(dir, cinfo, timestamp, cache_validity);
1130 spin_unlock(&dir->i_lock);
1131 }
1132
1133 struct nfs4_open_createattrs {
1134 struct nfs4_label *label;
1135 struct iattr *sattr;
1136 const __u32 verf[2];
1137 };
1138
1139 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1140 int err, struct nfs4_exception *exception)
1141 {
1142 if (err != -EINVAL)
1143 return false;
1144 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1145 return false;
1146 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1147 exception->retry = 1;
1148 return true;
1149 }
1150
1151 static u32
1152 nfs4_map_atomic_open_share(struct nfs_server *server,
1153 fmode_t fmode, int openflags)
1154 {
1155 u32 res = 0;
1156
1157 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1158 case FMODE_READ:
1159 res = NFS4_SHARE_ACCESS_READ;
1160 break;
1161 case FMODE_WRITE:
1162 res = NFS4_SHARE_ACCESS_WRITE;
1163 break;
1164 case FMODE_READ|FMODE_WRITE:
1165 res = NFS4_SHARE_ACCESS_BOTH;
1166 }
1167 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1168 goto out;
1169 /* Want no delegation if we're using O_DIRECT */
1170 if (openflags & O_DIRECT)
1171 res |= NFS4_SHARE_WANT_NO_DELEG;
1172 out:
1173 return res;
1174 }
1175
1176 static enum open_claim_type4
1177 nfs4_map_atomic_open_claim(struct nfs_server *server,
1178 enum open_claim_type4 claim)
1179 {
1180 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1181 return claim;
1182 switch (claim) {
1183 default:
1184 return claim;
1185 case NFS4_OPEN_CLAIM_FH:
1186 return NFS4_OPEN_CLAIM_NULL;
1187 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1188 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1189 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1190 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1191 }
1192 }
1193
1194 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1195 {
1196 p->o_res.f_attr = &p->f_attr;
1197 p->o_res.f_label = p->f_label;
1198 p->o_res.seqid = p->o_arg.seqid;
1199 p->c_res.seqid = p->c_arg.seqid;
1200 p->o_res.server = p->o_arg.server;
1201 p->o_res.access_request = p->o_arg.access;
1202 nfs_fattr_init(&p->f_attr);
1203 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1204 }
1205
1206 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1207 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1208 const struct nfs4_open_createattrs *c,
1209 enum open_claim_type4 claim,
1210 gfp_t gfp_mask)
1211 {
1212 struct dentry *parent = dget_parent(dentry);
1213 struct inode *dir = d_inode(parent);
1214 struct nfs_server *server = NFS_SERVER(dir);
1215 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1216 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
1217 struct nfs4_opendata *p;
1218
1219 p = kzalloc(sizeof(*p), gfp_mask);
1220 if (p == NULL)
1221 goto err;
1222
1223 p->f_label = nfs4_label_alloc(server, gfp_mask);
1224 if (IS_ERR(p->f_label))
1225 goto err_free_p;
1226
1227 p->a_label = nfs4_label_alloc(server, gfp_mask);
1228 if (IS_ERR(p->a_label))
1229 goto err_free_f;
1230
1231 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1232 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1233 if (IS_ERR(p->o_arg.seqid))
1234 goto err_free_label;
1235 nfs_sb_active(dentry->d_sb);
1236 p->dentry = dget(dentry);
1237 p->dir = parent;
1238 p->owner = sp;
1239 atomic_inc(&sp->so_count);
1240 p->o_arg.open_flags = flags;
1241 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1242 p->o_arg.umask = current_umask();
1243 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1244 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1245 fmode, flags);
1246 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1247 * will return permission denied for all bits until close */
1248 if (!(flags & O_EXCL)) {
1249 /* ask server to check for all possible rights as results
1250 * are cached */
1251 switch (p->o_arg.claim) {
1252 default:
1253 break;
1254 case NFS4_OPEN_CLAIM_NULL:
1255 case NFS4_OPEN_CLAIM_FH:
1256 p->o_arg.access = NFS4_ACCESS_READ |
1257 NFS4_ACCESS_MODIFY |
1258 NFS4_ACCESS_EXTEND |
1259 NFS4_ACCESS_EXECUTE;
1260 }
1261 }
1262 p->o_arg.clientid = server->nfs_client->cl_clientid;
1263 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1264 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1265 p->o_arg.name = &dentry->d_name;
1266 p->o_arg.server = server;
1267 p->o_arg.bitmask = nfs4_bitmask(server, label);
1268 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1269 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1270 switch (p->o_arg.claim) {
1271 case NFS4_OPEN_CLAIM_NULL:
1272 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1273 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1274 p->o_arg.fh = NFS_FH(dir);
1275 break;
1276 case NFS4_OPEN_CLAIM_PREVIOUS:
1277 case NFS4_OPEN_CLAIM_FH:
1278 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1279 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1280 p->o_arg.fh = NFS_FH(d_inode(dentry));
1281 }
1282 if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) {
1283 p->o_arg.u.attrs = &p->attrs;
1284 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
1285
1286 memcpy(p->o_arg.u.verifier.data, c->verf,
1287 sizeof(p->o_arg.u.verifier.data));
1288 }
1289 p->c_arg.fh = &p->o_res.fh;
1290 p->c_arg.stateid = &p->o_res.stateid;
1291 p->c_arg.seqid = p->o_arg.seqid;
1292 nfs4_init_opendata_res(p);
1293 kref_init(&p->kref);
1294 return p;
1295
1296 err_free_label:
1297 nfs4_label_free(p->a_label);
1298 err_free_f:
1299 nfs4_label_free(p->f_label);
1300 err_free_p:
1301 kfree(p);
1302 err:
1303 dput(parent);
1304 return NULL;
1305 }
1306
1307 static void nfs4_opendata_free(struct kref *kref)
1308 {
1309 struct nfs4_opendata *p = container_of(kref,
1310 struct nfs4_opendata, kref);
1311 struct super_block *sb = p->dentry->d_sb;
1312
1313 nfs4_lgopen_release(p->lgp);
1314 nfs_free_seqid(p->o_arg.seqid);
1315 nfs4_sequence_free_slot(&p->o_res.seq_res);
1316 if (p->state != NULL)
1317 nfs4_put_open_state(p->state);
1318 nfs4_put_state_owner(p->owner);
1319
1320 nfs4_label_free(p->a_label);
1321 nfs4_label_free(p->f_label);
1322
1323 dput(p->dir);
1324 dput(p->dentry);
1325 nfs_sb_deactive(sb);
1326 nfs_fattr_free_names(&p->f_attr);
1327 kfree(p->f_attr.mdsthreshold);
1328 kfree(p);
1329 }
1330
1331 static void nfs4_opendata_put(struct nfs4_opendata *p)
1332 {
1333 if (p != NULL)
1334 kref_put(&p->kref, nfs4_opendata_free);
1335 }
1336
1337 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1338 fmode_t fmode)
1339 {
1340 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1341 case FMODE_READ|FMODE_WRITE:
1342 return state->n_rdwr != 0;
1343 case FMODE_WRITE:
1344 return state->n_wronly != 0;
1345 case FMODE_READ:
1346 return state->n_rdonly != 0;
1347 }
1348 WARN_ON_ONCE(1);
1349 return false;
1350 }
1351
1352 static int can_open_cached(struct nfs4_state *state, fmode_t mode,
1353 int open_mode, enum open_claim_type4 claim)
1354 {
1355 int ret = 0;
1356
1357 if (open_mode & (O_EXCL|O_TRUNC))
1358 goto out;
1359 switch (claim) {
1360 case NFS4_OPEN_CLAIM_NULL:
1361 case NFS4_OPEN_CLAIM_FH:
1362 goto out;
1363 default:
1364 break;
1365 }
1366 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1367 case FMODE_READ:
1368 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1369 && state->n_rdonly != 0;
1370 break;
1371 case FMODE_WRITE:
1372 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1373 && state->n_wronly != 0;
1374 break;
1375 case FMODE_READ|FMODE_WRITE:
1376 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1377 && state->n_rdwr != 0;
1378 }
1379 out:
1380 return ret;
1381 }
1382
1383 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1384 enum open_claim_type4 claim)
1385 {
1386 if (delegation == NULL)
1387 return 0;
1388 if ((delegation->type & fmode) != fmode)
1389 return 0;
1390 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1391 return 0;
1392 switch (claim) {
1393 case NFS4_OPEN_CLAIM_NULL:
1394 case NFS4_OPEN_CLAIM_FH:
1395 break;
1396 case NFS4_OPEN_CLAIM_PREVIOUS:
1397 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1398 break;
1399 /* Fall through */
1400 default:
1401 return 0;
1402 }
1403 nfs_mark_delegation_referenced(delegation);
1404 return 1;
1405 }
1406
1407 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1408 {
1409 switch (fmode) {
1410 case FMODE_WRITE:
1411 state->n_wronly++;
1412 break;
1413 case FMODE_READ:
1414 state->n_rdonly++;
1415 break;
1416 case FMODE_READ|FMODE_WRITE:
1417 state->n_rdwr++;
1418 }
1419 nfs4_state_set_mode_locked(state, state->state | fmode);
1420 }
1421
1422 #ifdef CONFIG_NFS_V4_1
1423 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1424 {
1425 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1426 return true;
1427 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1428 return true;
1429 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1430 return true;
1431 return false;
1432 }
1433 #endif /* CONFIG_NFS_V4_1 */
1434
1435 static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1436 {
1437 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1438 wake_up_all(&state->waitq);
1439 }
1440
1441 static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1442 const nfs4_stateid *stateid)
1443 {
1444 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1445 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1446
1447 if (stateid_seqid == state_seqid + 1U ||
1448 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1449 nfs_state_log_update_open_stateid(state);
1450 else
1451 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1452 }
1453
1454 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1455 {
1456 struct nfs_client *clp = state->owner->so_server->nfs_client;
1457 bool need_recover = false;
1458
1459 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1460 need_recover = true;
1461 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1462 need_recover = true;
1463 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1464 need_recover = true;
1465 if (need_recover)
1466 nfs4_state_mark_reclaim_nograce(clp, state);
1467 }
1468
1469 /*
1470 * Check for whether or not the caller may update the open stateid
1471 * to the value passed in by stateid.
1472 *
1473 * Note: This function relies heavily on the server implementing
1474 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1475 * correctly.
1476 * i.e. The stateid seqids have to be initialised to 1, and
1477 * are then incremented on every state transition.
1478 */
1479 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1480 const nfs4_stateid *stateid)
1481 {
1482 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1483 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1484 if (stateid->seqid == cpu_to_be32(1))
1485 nfs_state_log_update_open_stateid(state);
1486 else
1487 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1488 return true;
1489 }
1490
1491 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1492 nfs_state_log_out_of_order_open_stateid(state, stateid);
1493 return true;
1494 }
1495 return false;
1496 }
1497
1498 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1499 {
1500 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1501 return;
1502 if (state->n_wronly)
1503 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1504 if (state->n_rdonly)
1505 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1506 if (state->n_rdwr)
1507 set_bit(NFS_O_RDWR_STATE, &state->flags);
1508 set_bit(NFS_OPEN_STATE, &state->flags);
1509 }
1510
1511 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1512 nfs4_stateid *stateid, fmode_t fmode)
1513 {
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1516 case FMODE_WRITE:
1517 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1518 break;
1519 case FMODE_READ:
1520 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1521 break;
1522 case 0:
1523 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1524 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1525 clear_bit(NFS_OPEN_STATE, &state->flags);
1526 }
1527 if (stateid == NULL)
1528 return;
1529 /* Handle OPEN+OPEN_DOWNGRADE races */
1530 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1531 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1532 nfs_resync_open_stateid_locked(state);
1533 goto out;
1534 }
1535 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1536 nfs4_stateid_copy(&state->stateid, stateid);
1537 nfs4_stateid_copy(&state->open_stateid, stateid);
1538 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
1539 out:
1540 nfs_state_log_update_open_stateid(state);
1541 }
1542
1543 static void nfs_clear_open_stateid(struct nfs4_state *state,
1544 nfs4_stateid *arg_stateid,
1545 nfs4_stateid *stateid, fmode_t fmode)
1546 {
1547 write_seqlock(&state->seqlock);
1548 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1549 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1550 nfs_clear_open_stateid_locked(state, stateid, fmode);
1551 write_sequnlock(&state->seqlock);
1552 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1553 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1554 }
1555
1556 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1557 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1558 {
1559 DEFINE_WAIT(wait);
1560 int status = 0;
1561 for (;;) {
1562
1563 if (!nfs_need_update_open_stateid(state, stateid))
1564 return;
1565 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1566 break;
1567 if (status)
1568 break;
1569 /* Rely on seqids for serialisation with NFSv4.0 */
1570 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1571 break;
1572
1573 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1574 /*
1575 * Ensure we process the state changes in the same order
1576 * in which the server processed them by delaying the
1577 * update of the stateid until we are in sequence.
1578 */
1579 write_sequnlock(&state->seqlock);
1580 spin_unlock(&state->owner->so_lock);
1581 rcu_read_unlock();
1582 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
1583 if (!signal_pending(current)) {
1584 if (schedule_timeout(5*HZ) == 0)
1585 status = -EAGAIN;
1586 else
1587 status = 0;
1588 } else
1589 status = -EINTR;
1590 finish_wait(&state->waitq, &wait);
1591 rcu_read_lock();
1592 spin_lock(&state->owner->so_lock);
1593 write_seqlock(&state->seqlock);
1594 }
1595
1596 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1597 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1598 nfs4_stateid_copy(freeme, &state->open_stateid);
1599 nfs_test_and_clear_all_open_stateid(state);
1600 }
1601
1602 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1603 nfs4_stateid_copy(&state->stateid, stateid);
1604 nfs4_stateid_copy(&state->open_stateid, stateid);
1605 trace_nfs4_open_stateid_update(state->inode, stateid, status);
1606 nfs_state_log_update_open_stateid(state);
1607 }
1608
1609 static void nfs_state_set_open_stateid(struct nfs4_state *state,
1610 const nfs4_stateid *open_stateid,
1611 fmode_t fmode,
1612 nfs4_stateid *freeme)
1613 {
1614 /*
1615 * Protect the call to nfs4_state_set_mode_locked and
1616 * serialise the stateid update
1617 */
1618 write_seqlock(&state->seqlock);
1619 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1620 switch (fmode) {
1621 case FMODE_READ:
1622 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1623 break;
1624 case FMODE_WRITE:
1625 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1626 break;
1627 case FMODE_READ|FMODE_WRITE:
1628 set_bit(NFS_O_RDWR_STATE, &state->flags);
1629 }
1630 set_bit(NFS_OPEN_STATE, &state->flags);
1631 write_sequnlock(&state->seqlock);
1632 }
1633
1634 static void nfs_state_set_delegation(struct nfs4_state *state,
1635 const nfs4_stateid *deleg_stateid,
1636 fmode_t fmode)
1637 {
1638 /*
1639 * Protect the call to nfs4_state_set_mode_locked and
1640 * serialise the stateid update
1641 */
1642 write_seqlock(&state->seqlock);
1643 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1644 set_bit(NFS_DELEGATED_STATE, &state->flags);
1645 write_sequnlock(&state->seqlock);
1646 }
1647
1648 static void nfs_state_clear_delegation(struct nfs4_state *state)
1649 {
1650 write_seqlock(&state->seqlock);
1651 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1652 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1653 write_sequnlock(&state->seqlock);
1654 }
1655
1656 static int update_open_stateid(struct nfs4_state *state,
1657 const nfs4_stateid *open_stateid,
1658 const nfs4_stateid *delegation,
1659 fmode_t fmode)
1660 {
1661 struct nfs_server *server = NFS_SERVER(state->inode);
1662 struct nfs_client *clp = server->nfs_client;
1663 struct nfs_inode *nfsi = NFS_I(state->inode);
1664 struct nfs_delegation *deleg_cur;
1665 nfs4_stateid freeme = { };
1666 int ret = 0;
1667
1668 fmode &= (FMODE_READ|FMODE_WRITE);
1669
1670 rcu_read_lock();
1671 spin_lock(&state->owner->so_lock);
1672 if (open_stateid != NULL) {
1673 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1674 ret = 1;
1675 }
1676
1677 deleg_cur = rcu_dereference(nfsi->delegation);
1678 if (deleg_cur == NULL)
1679 goto no_delegation;
1680
1681 spin_lock(&deleg_cur->lock);
1682 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1683 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1684 (deleg_cur->type & fmode) != fmode)
1685 goto no_delegation_unlock;
1686
1687 if (delegation == NULL)
1688 delegation = &deleg_cur->stateid;
1689 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1690 goto no_delegation_unlock;
1691
1692 nfs_mark_delegation_referenced(deleg_cur);
1693 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
1694 ret = 1;
1695 no_delegation_unlock:
1696 spin_unlock(&deleg_cur->lock);
1697 no_delegation:
1698 if (ret)
1699 update_open_stateflags(state, fmode);
1700 spin_unlock(&state->owner->so_lock);
1701 rcu_read_unlock();
1702
1703 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1704 nfs4_schedule_state_manager(clp);
1705 if (freeme.type != 0)
1706 nfs4_test_and_free_stateid(server, &freeme,
1707 state->owner->so_cred);
1708
1709 return ret;
1710 }
1711
1712 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1713 const nfs4_stateid *stateid)
1714 {
1715 struct nfs4_state *state = lsp->ls_state;
1716 bool ret = false;
1717
1718 spin_lock(&state->state_lock);
1719 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1720 goto out_noupdate;
1721 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1722 goto out_noupdate;
1723 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1724 ret = true;
1725 out_noupdate:
1726 spin_unlock(&state->state_lock);
1727 return ret;
1728 }
1729
1730 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1731 {
1732 struct nfs_delegation *delegation;
1733
1734 fmode &= FMODE_READ|FMODE_WRITE;
1735 rcu_read_lock();
1736 delegation = rcu_dereference(NFS_I(inode)->delegation);
1737 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1738 rcu_read_unlock();
1739 return;
1740 }
1741 rcu_read_unlock();
1742 nfs4_inode_return_delegation(inode);
1743 }
1744
1745 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1746 {
1747 struct nfs4_state *state = opendata->state;
1748 struct nfs_inode *nfsi = NFS_I(state->inode);
1749 struct nfs_delegation *delegation;
1750 int open_mode = opendata->o_arg.open_flags;
1751 fmode_t fmode = opendata->o_arg.fmode;
1752 enum open_claim_type4 claim = opendata->o_arg.claim;
1753 nfs4_stateid stateid;
1754 int ret = -EAGAIN;
1755
1756 for (;;) {
1757 spin_lock(&state->owner->so_lock);
1758 if (can_open_cached(state, fmode, open_mode, claim)) {
1759 update_open_stateflags(state, fmode);
1760 spin_unlock(&state->owner->so_lock);
1761 goto out_return_state;
1762 }
1763 spin_unlock(&state->owner->so_lock);
1764 rcu_read_lock();
1765 delegation = rcu_dereference(nfsi->delegation);
1766 if (!can_open_delegated(delegation, fmode, claim)) {
1767 rcu_read_unlock();
1768 break;
1769 }
1770 /* Save the delegation */
1771 nfs4_stateid_copy(&stateid, &delegation->stateid);
1772 rcu_read_unlock();
1773 nfs_release_seqid(opendata->o_arg.seqid);
1774 if (!opendata->is_recover) {
1775 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1776 if (ret != 0)
1777 goto out;
1778 }
1779 ret = -EAGAIN;
1780
1781 /* Try to update the stateid using the delegation */
1782 if (update_open_stateid(state, NULL, &stateid, fmode))
1783 goto out_return_state;
1784 }
1785 out:
1786 return ERR_PTR(ret);
1787 out_return_state:
1788 refcount_inc(&state->count);
1789 return state;
1790 }
1791
1792 static void
1793 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1794 {
1795 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1796 struct nfs_delegation *delegation;
1797 int delegation_flags = 0;
1798
1799 rcu_read_lock();
1800 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1801 if (delegation)
1802 delegation_flags = delegation->flags;
1803 rcu_read_unlock();
1804 switch (data->o_arg.claim) {
1805 default:
1806 break;
1807 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1808 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1809 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1810 "returning a delegation for "
1811 "OPEN(CLAIM_DELEGATE_CUR)\n",
1812 clp->cl_hostname);
1813 return;
1814 }
1815 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1816 nfs_inode_set_delegation(state->inode,
1817 data->owner->so_cred,
1818 data->o_res.delegation_type,
1819 &data->o_res.delegation,
1820 data->o_res.pagemod_limit);
1821 else
1822 nfs_inode_reclaim_delegation(state->inode,
1823 data->owner->so_cred,
1824 data->o_res.delegation_type,
1825 &data->o_res.delegation,
1826 data->o_res.pagemod_limit);
1827
1828 if (data->o_res.do_recall)
1829 nfs_async_inode_return_delegation(state->inode,
1830 &data->o_res.delegation);
1831 }
1832
1833 /*
1834 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1835 * and update the nfs4_state.
1836 */
1837 static struct nfs4_state *
1838 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1839 {
1840 struct inode *inode = data->state->inode;
1841 struct nfs4_state *state = data->state;
1842 int ret;
1843
1844 if (!data->rpc_done) {
1845 if (data->rpc_status)
1846 return ERR_PTR(data->rpc_status);
1847 /* cached opens have already been processed */
1848 goto update;
1849 }
1850
1851 ret = nfs_refresh_inode(inode, &data->f_attr);
1852 if (ret)
1853 return ERR_PTR(ret);
1854
1855 if (data->o_res.delegation_type != 0)
1856 nfs4_opendata_check_deleg(data, state);
1857 update:
1858 update_open_stateid(state, &data->o_res.stateid, NULL,
1859 data->o_arg.fmode);
1860 refcount_inc(&state->count);
1861
1862 return state;
1863 }
1864
1865 static struct inode *
1866 nfs4_opendata_get_inode(struct nfs4_opendata *data)
1867 {
1868 struct inode *inode;
1869
1870 switch (data->o_arg.claim) {
1871 case NFS4_OPEN_CLAIM_NULL:
1872 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1873 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1874 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1875 return ERR_PTR(-EAGAIN);
1876 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1877 &data->f_attr, data->f_label);
1878 break;
1879 default:
1880 inode = d_inode(data->dentry);
1881 ihold(inode);
1882 nfs_refresh_inode(inode, &data->f_attr);
1883 }
1884 return inode;
1885 }
1886
1887 static struct nfs4_state *
1888 nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
1889 {
1890 struct nfs4_state *state;
1891 struct inode *inode;
1892
1893 inode = nfs4_opendata_get_inode(data);
1894 if (IS_ERR(inode))
1895 return ERR_CAST(inode);
1896 if (data->state != NULL && data->state->inode == inode) {
1897 state = data->state;
1898 refcount_inc(&state->count);
1899 } else
1900 state = nfs4_get_open_state(inode, data->owner);
1901 iput(inode);
1902 if (state == NULL)
1903 state = ERR_PTR(-ENOMEM);
1904 return state;
1905 }
1906
1907 static struct nfs4_state *
1908 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1909 {
1910 struct nfs4_state *state;
1911
1912 if (!data->rpc_done) {
1913 state = nfs4_try_open_cached(data);
1914 trace_nfs4_cached_open(data->state);
1915 goto out;
1916 }
1917
1918 state = nfs4_opendata_find_nfs4_state(data);
1919 if (IS_ERR(state))
1920 goto out;
1921
1922 if (data->o_res.delegation_type != 0)
1923 nfs4_opendata_check_deleg(data, state);
1924 update_open_stateid(state, &data->o_res.stateid, NULL,
1925 data->o_arg.fmode);
1926 out:
1927 nfs_release_seqid(data->o_arg.seqid);
1928 return state;
1929 }
1930
1931 static struct nfs4_state *
1932 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1933 {
1934 struct nfs4_state *ret;
1935
1936 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1937 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1938 else
1939 ret = _nfs4_opendata_to_nfs4_state(data);
1940 nfs4_sequence_free_slot(&data->o_res.seq_res);
1941 return ret;
1942 }
1943
1944 static struct nfs_open_context *
1945 nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode)
1946 {
1947 struct nfs_inode *nfsi = NFS_I(state->inode);
1948 struct nfs_open_context *ctx;
1949
1950 rcu_read_lock();
1951 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) {
1952 if (ctx->state != state)
1953 continue;
1954 if ((ctx->mode & mode) != mode)
1955 continue;
1956 if (!get_nfs_open_context(ctx))
1957 continue;
1958 rcu_read_unlock();
1959 return ctx;
1960 }
1961 rcu_read_unlock();
1962 return ERR_PTR(-ENOENT);
1963 }
1964
1965 static struct nfs_open_context *
1966 nfs4_state_find_open_context(struct nfs4_state *state)
1967 {
1968 struct nfs_open_context *ctx;
1969
1970 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE);
1971 if (!IS_ERR(ctx))
1972 return ctx;
1973 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE);
1974 if (!IS_ERR(ctx))
1975 return ctx;
1976 return nfs4_state_find_open_context_mode(state, FMODE_READ);
1977 }
1978
1979 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1980 struct nfs4_state *state, enum open_claim_type4 claim)
1981 {
1982 struct nfs4_opendata *opendata;
1983
1984 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1985 NULL, claim, GFP_NOFS);
1986 if (opendata == NULL)
1987 return ERR_PTR(-ENOMEM);
1988 opendata->state = state;
1989 refcount_inc(&state->count);
1990 return opendata;
1991 }
1992
1993 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1994 fmode_t fmode)
1995 {
1996 struct nfs4_state *newstate;
1997 int ret;
1998
1999 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
2000 return 0;
2001 opendata->o_arg.open_flags = 0;
2002 opendata->o_arg.fmode = fmode;
2003 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
2004 NFS_SB(opendata->dentry->d_sb),
2005 fmode, 0);
2006 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
2007 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
2008 nfs4_init_opendata_res(opendata);
2009 ret = _nfs4_recover_proc_open(opendata);
2010 if (ret != 0)
2011 return ret;
2012 newstate = nfs4_opendata_to_nfs4_state(opendata);
2013 if (IS_ERR(newstate))
2014 return PTR_ERR(newstate);
2015 if (newstate != opendata->state)
2016 ret = -ESTALE;
2017 nfs4_close_state(newstate, fmode);
2018 return ret;
2019 }
2020
2021 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
2022 {
2023 int ret;
2024
2025 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
2026 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2027 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2028 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2029 /* memory barrier prior to reading state->n_* */
2030 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2031 clear_bit(NFS_OPEN_STATE, &state->flags);
2032 smp_rmb();
2033 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2034 if (ret != 0)
2035 return ret;
2036 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2037 if (ret != 0)
2038 return ret;
2039 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
2040 if (ret != 0)
2041 return ret;
2042 /*
2043 * We may have performed cached opens for all three recoveries.
2044 * Check if we need to update the current stateid.
2045 */
2046 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
2047 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
2048 write_seqlock(&state->seqlock);
2049 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2050 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2051 write_sequnlock(&state->seqlock);
2052 }
2053 return 0;
2054 }
2055
2056 /*
2057 * OPEN_RECLAIM:
2058 * reclaim state on the server after a reboot.
2059 */
2060 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2061 {
2062 struct nfs_delegation *delegation;
2063 struct nfs4_opendata *opendata;
2064 fmode_t delegation_type = 0;
2065 int status;
2066
2067 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2068 NFS4_OPEN_CLAIM_PREVIOUS);
2069 if (IS_ERR(opendata))
2070 return PTR_ERR(opendata);
2071 rcu_read_lock();
2072 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2073 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
2074 delegation_type = delegation->type;
2075 rcu_read_unlock();
2076 opendata->o_arg.u.delegation_type = delegation_type;
2077 status = nfs4_open_recover(opendata, state);
2078 nfs4_opendata_put(opendata);
2079 return status;
2080 }
2081
2082 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
2083 {
2084 struct nfs_server *server = NFS_SERVER(state->inode);
2085 struct nfs4_exception exception = { };
2086 int err;
2087 do {
2088 err = _nfs4_do_open_reclaim(ctx, state);
2089 trace_nfs4_open_reclaim(ctx, 0, err);
2090 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2091 continue;
2092 if (err != -NFS4ERR_DELAY)
2093 break;
2094 nfs4_handle_exception(server, err, &exception);
2095 } while (exception.retry);
2096 return err;
2097 }
2098
2099 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2100 {
2101 struct nfs_open_context *ctx;
2102 int ret;
2103
2104 ctx = nfs4_state_find_open_context(state);
2105 if (IS_ERR(ctx))
2106 return -EAGAIN;
2107 ret = nfs4_do_open_reclaim(ctx, state);
2108 put_nfs_open_context(ctx);
2109 return ret;
2110 }
2111
2112 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err)
2113 {
2114 switch (err) {
2115 default:
2116 printk(KERN_ERR "NFS: %s: unhandled error "
2117 "%d.\n", __func__, err);
2118 case 0:
2119 case -ENOENT:
2120 case -EAGAIN:
2121 case -ESTALE:
2122 break;
2123 case -NFS4ERR_BADSESSION:
2124 case -NFS4ERR_BADSLOT:
2125 case -NFS4ERR_BAD_HIGH_SLOT:
2126 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2127 case -NFS4ERR_DEADSESSION:
2128 set_bit(NFS_DELEGATED_STATE, &state->flags);
2129 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
2130 return -EAGAIN;
2131 case -NFS4ERR_STALE_CLIENTID:
2132 case -NFS4ERR_STALE_STATEID:
2133 set_bit(NFS_DELEGATED_STATE, &state->flags);
2134 /* Don't recall a delegation if it was lost */
2135 nfs4_schedule_lease_recovery(server->nfs_client);
2136 return -EAGAIN;
2137 case -NFS4ERR_MOVED:
2138 nfs4_schedule_migration_recovery(server);
2139 return -EAGAIN;
2140 case -NFS4ERR_LEASE_MOVED:
2141 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2142 return -EAGAIN;
2143 case -NFS4ERR_DELEG_REVOKED:
2144 case -NFS4ERR_ADMIN_REVOKED:
2145 case -NFS4ERR_EXPIRED:
2146 case -NFS4ERR_BAD_STATEID:
2147 case -NFS4ERR_OPENMODE:
2148 nfs_inode_find_state_and_recover(state->inode,
2149 stateid);
2150 nfs4_schedule_stateid_recovery(server, state);
2151 return -EAGAIN;
2152 case -NFS4ERR_DELAY:
2153 case -NFS4ERR_GRACE:
2154 set_bit(NFS_DELEGATED_STATE, &state->flags);
2155 ssleep(1);
2156 return -EAGAIN;
2157 case -ENOMEM:
2158 case -NFS4ERR_DENIED:
2159 if (fl) {
2160 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner;
2161 if (lsp)
2162 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2163 }
2164 return 0;
2165 }
2166 return err;
2167 }
2168
2169 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2170 struct nfs4_state *state, const nfs4_stateid *stateid,
2171 fmode_t type)
2172 {
2173 struct nfs_server *server = NFS_SERVER(state->inode);
2174 struct nfs4_opendata *opendata;
2175 int err = 0;
2176
2177 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2178 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2179 if (IS_ERR(opendata))
2180 return PTR_ERR(opendata);
2181 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2182 nfs_state_clear_delegation(state);
2183 switch (type & (FMODE_READ|FMODE_WRITE)) {
2184 case FMODE_READ|FMODE_WRITE:
2185 case FMODE_WRITE:
2186 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2187 if (err)
2188 break;
2189 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2190 if (err)
2191 break;
2192 /* Fall through */
2193 case FMODE_READ:
2194 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2195 }
2196 nfs4_opendata_put(opendata);
2197 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err);
2198 }
2199
2200 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2201 {
2202 struct nfs4_opendata *data = calldata;
2203
2204 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2205 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2206 }
2207
2208 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2209 {
2210 struct nfs4_opendata *data = calldata;
2211
2212 nfs40_sequence_done(task, &data->c_res.seq_res);
2213
2214 data->rpc_status = task->tk_status;
2215 if (data->rpc_status == 0) {
2216 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2217 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2218 renew_lease(data->o_res.server, data->timestamp);
2219 data->rpc_done = true;
2220 }
2221 }
2222
2223 static void nfs4_open_confirm_release(void *calldata)
2224 {
2225 struct nfs4_opendata *data = calldata;
2226 struct nfs4_state *state = NULL;
2227
2228 /* If this request hasn't been cancelled, do nothing */
2229 if (!data->cancelled)
2230 goto out_free;
2231 /* In case of error, no cleanup! */
2232 if (!data->rpc_done)
2233 goto out_free;
2234 state = nfs4_opendata_to_nfs4_state(data);
2235 if (!IS_ERR(state))
2236 nfs4_close_state(state, data->o_arg.fmode);
2237 out_free:
2238 nfs4_opendata_put(data);
2239 }
2240
2241 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2242 .rpc_call_prepare = nfs4_open_confirm_prepare,
2243 .rpc_call_done = nfs4_open_confirm_done,
2244 .rpc_release = nfs4_open_confirm_release,
2245 };
2246
2247 /*
2248 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2249 */
2250 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2251 {
2252 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2253 struct rpc_task *task;
2254 struct rpc_message msg = {
2255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2256 .rpc_argp = &data->c_arg,
2257 .rpc_resp = &data->c_res,
2258 .rpc_cred = data->owner->so_cred,
2259 };
2260 struct rpc_task_setup task_setup_data = {
2261 .rpc_client = server->client,
2262 .rpc_message = &msg,
2263 .callback_ops = &nfs4_open_confirm_ops,
2264 .callback_data = data,
2265 .workqueue = nfsiod_workqueue,
2266 .flags = RPC_TASK_ASYNC,
2267 };
2268 int status;
2269
2270 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1,
2271 data->is_recover);
2272 kref_get(&data->kref);
2273 data->rpc_done = false;
2274 data->rpc_status = 0;
2275 data->timestamp = jiffies;
2276 task = rpc_run_task(&task_setup_data);
2277 if (IS_ERR(task))
2278 return PTR_ERR(task);
2279 status = rpc_wait_for_completion_task(task);
2280 if (status != 0) {
2281 data->cancelled = true;
2282 smp_wmb();
2283 } else
2284 status = data->rpc_status;
2285 rpc_put_task(task);
2286 return status;
2287 }
2288
2289 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2290 {
2291 struct nfs4_opendata *data = calldata;
2292 struct nfs4_state_owner *sp = data->owner;
2293 struct nfs_client *clp = sp->so_server->nfs_client;
2294 enum open_claim_type4 claim = data->o_arg.claim;
2295
2296 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2297 goto out_wait;
2298 /*
2299 * Check if we still need to send an OPEN call, or if we can use
2300 * a delegation instead.
2301 */
2302 if (data->state != NULL) {
2303 struct nfs_delegation *delegation;
2304
2305 if (can_open_cached(data->state, data->o_arg.fmode,
2306 data->o_arg.open_flags, claim))
2307 goto out_no_action;
2308 rcu_read_lock();
2309 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2310 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2311 goto unlock_no_action;
2312 rcu_read_unlock();
2313 }
2314 /* Update client id. */
2315 data->o_arg.clientid = clp->cl_clientid;
2316 switch (claim) {
2317 default:
2318 break;
2319 case NFS4_OPEN_CLAIM_PREVIOUS:
2320 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2321 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2322 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2323 /* Fall through */
2324 case NFS4_OPEN_CLAIM_FH:
2325 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2326 }
2327 data->timestamp = jiffies;
2328 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2329 &data->o_arg.seq_args,
2330 &data->o_res.seq_res,
2331 task) != 0)
2332 nfs_release_seqid(data->o_arg.seqid);
2333
2334 /* Set the create mode (note dependency on the session type) */
2335 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2336 if (data->o_arg.open_flags & O_EXCL) {
2337 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2338 if (nfs4_has_persistent_session(clp))
2339 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2340 else if (clp->cl_mvops->minor_version > 0)
2341 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2342 }
2343 return;
2344 unlock_no_action:
2345 trace_nfs4_cached_open(data->state);
2346 rcu_read_unlock();
2347 out_no_action:
2348 task->tk_action = NULL;
2349 out_wait:
2350 nfs4_sequence_done(task, &data->o_res.seq_res);
2351 }
2352
2353 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2354 {
2355 struct nfs4_opendata *data = calldata;
2356
2357 data->rpc_status = task->tk_status;
2358
2359 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2360 return;
2361
2362 if (task->tk_status == 0) {
2363 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2364 switch (data->o_res.f_attr->mode & S_IFMT) {
2365 case S_IFREG:
2366 break;
2367 case S_IFLNK:
2368 data->rpc_status = -ELOOP;
2369 break;
2370 case S_IFDIR:
2371 data->rpc_status = -EISDIR;
2372 break;
2373 default:
2374 data->rpc_status = -ENOTDIR;
2375 }
2376 }
2377 renew_lease(data->o_res.server, data->timestamp);
2378 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2379 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2380 }
2381 data->rpc_done = true;
2382 }
2383
2384 static void nfs4_open_release(void *calldata)
2385 {
2386 struct nfs4_opendata *data = calldata;
2387 struct nfs4_state *state = NULL;
2388
2389 /* If this request hasn't been cancelled, do nothing */
2390 if (!data->cancelled)
2391 goto out_free;
2392 /* In case of error, no cleanup! */
2393 if (data->rpc_status != 0 || !data->rpc_done)
2394 goto out_free;
2395 /* In case we need an open_confirm, no cleanup! */
2396 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2397 goto out_free;
2398 state = nfs4_opendata_to_nfs4_state(data);
2399 if (!IS_ERR(state))
2400 nfs4_close_state(state, data->o_arg.fmode);
2401 out_free:
2402 nfs4_opendata_put(data);
2403 }
2404
2405 static const struct rpc_call_ops nfs4_open_ops = {
2406 .rpc_call_prepare = nfs4_open_prepare,
2407 .rpc_call_done = nfs4_open_done,
2408 .rpc_release = nfs4_open_release,
2409 };
2410
2411 static int nfs4_run_open_task(struct nfs4_opendata *data,
2412 struct nfs_open_context *ctx)
2413 {
2414 struct inode *dir = d_inode(data->dir);
2415 struct nfs_server *server = NFS_SERVER(dir);
2416 struct nfs_openargs *o_arg = &data->o_arg;
2417 struct nfs_openres *o_res = &data->o_res;
2418 struct rpc_task *task;
2419 struct rpc_message msg = {
2420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2421 .rpc_argp = o_arg,
2422 .rpc_resp = o_res,
2423 .rpc_cred = data->owner->so_cred,
2424 };
2425 struct rpc_task_setup task_setup_data = {
2426 .rpc_client = server->client,
2427 .rpc_message = &msg,
2428 .callback_ops = &nfs4_open_ops,
2429 .callback_data = data,
2430 .workqueue = nfsiod_workqueue,
2431 .flags = RPC_TASK_ASYNC,
2432 };
2433 int status;
2434
2435 kref_get(&data->kref);
2436 data->rpc_done = false;
2437 data->rpc_status = 0;
2438 data->cancelled = false;
2439 data->is_recover = false;
2440 if (!ctx) {
2441 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1);
2442 data->is_recover = true;
2443 } else {
2444 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0);
2445 pnfs_lgopen_prepare(data, ctx);
2446 }
2447 task = rpc_run_task(&task_setup_data);
2448 if (IS_ERR(task))
2449 return PTR_ERR(task);
2450 status = rpc_wait_for_completion_task(task);
2451 if (status != 0) {
2452 data->cancelled = true;
2453 smp_wmb();
2454 } else
2455 status = data->rpc_status;
2456 rpc_put_task(task);
2457
2458 return status;
2459 }
2460
2461 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2462 {
2463 struct inode *dir = d_inode(data->dir);
2464 struct nfs_openres *o_res = &data->o_res;
2465 int status;
2466
2467 status = nfs4_run_open_task(data, NULL);
2468 if (status != 0 || !data->rpc_done)
2469 return status;
2470
2471 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2472
2473 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2474 status = _nfs4_proc_open_confirm(data);
2475
2476 return status;
2477 }
2478
2479 /*
2480 * Additional permission checks in order to distinguish between an
2481 * open for read, and an open for execute. This works around the
2482 * fact that NFSv4 OPEN treats read and execute permissions as being
2483 * the same.
2484 * Note that in the non-execute case, we want to turn off permission
2485 * checking if we just created a new file (POSIX open() semantics).
2486 */
2487 static int nfs4_opendata_access(struct rpc_cred *cred,
2488 struct nfs4_opendata *opendata,
2489 struct nfs4_state *state, fmode_t fmode,
2490 int openflags)
2491 {
2492 struct nfs_access_entry cache;
2493 u32 mask, flags;
2494
2495 /* access call failed or for some reason the server doesn't
2496 * support any access modes -- defer access call until later */
2497 if (opendata->o_res.access_supported == 0)
2498 return 0;
2499
2500 mask = 0;
2501 /*
2502 * Use openflags to check for exec, because fmode won't
2503 * always have FMODE_EXEC set when file open for exec.
2504 */
2505 if (openflags & __FMODE_EXEC) {
2506 /* ONLY check for exec rights */
2507 if (S_ISDIR(state->inode->i_mode))
2508 mask = NFS4_ACCESS_LOOKUP;
2509 else
2510 mask = NFS4_ACCESS_EXECUTE;
2511 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2512 mask = NFS4_ACCESS_READ;
2513
2514 cache.cred = cred;
2515 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2516 nfs_access_add_cache(state->inode, &cache);
2517
2518 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2519 if ((mask & ~cache.mask & flags) == 0)
2520 return 0;
2521
2522 return -EACCES;
2523 }
2524
2525 /*
2526 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2527 */
2528 static int _nfs4_proc_open(struct nfs4_opendata *data,
2529 struct nfs_open_context *ctx)
2530 {
2531 struct inode *dir = d_inode(data->dir);
2532 struct nfs_server *server = NFS_SERVER(dir);
2533 struct nfs_openargs *o_arg = &data->o_arg;
2534 struct nfs_openres *o_res = &data->o_res;
2535 int status;
2536
2537 status = nfs4_run_open_task(data, ctx);
2538 if (!data->rpc_done)
2539 return status;
2540 if (status != 0) {
2541 if (status == -NFS4ERR_BADNAME &&
2542 !(o_arg->open_flags & O_CREAT))
2543 return -ENOENT;
2544 return status;
2545 }
2546
2547 nfs_fattr_map_and_free_names(server, &data->f_attr);
2548
2549 if (o_arg->open_flags & O_CREAT) {
2550 if (o_arg->open_flags & O_EXCL)
2551 data->file_created = true;
2552 else if (o_res->cinfo.before != o_res->cinfo.after)
2553 data->file_created = true;
2554 if (data->file_created ||
2555 inode_peek_iversion_raw(dir) != o_res->cinfo.after)
2556 update_changeattr(dir, &o_res->cinfo,
2557 o_res->f_attr->time_start, 0);
2558 }
2559 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2560 server->caps &= ~NFS_CAP_POSIX_LOCK;
2561 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2562 status = _nfs4_proc_open_confirm(data);
2563 if (status != 0)
2564 return status;
2565 }
2566 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2567 nfs4_sequence_free_slot(&o_res->seq_res);
2568 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr,
2569 o_res->f_label, NULL);
2570 }
2571 return 0;
2572 }
2573
2574 /*
2575 * OPEN_EXPIRED:
2576 * reclaim state on the server after a network partition.
2577 * Assumes caller holds the appropriate lock
2578 */
2579 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2580 {
2581 struct nfs4_opendata *opendata;
2582 int ret;
2583
2584 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2585 NFS4_OPEN_CLAIM_FH);
2586 if (IS_ERR(opendata))
2587 return PTR_ERR(opendata);
2588 ret = nfs4_open_recover(opendata, state);
2589 if (ret == -ESTALE)
2590 d_drop(ctx->dentry);
2591 nfs4_opendata_put(opendata);
2592 return ret;
2593 }
2594
2595 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2596 {
2597 struct nfs_server *server = NFS_SERVER(state->inode);
2598 struct nfs4_exception exception = { };
2599 int err;
2600
2601 do {
2602 err = _nfs4_open_expired(ctx, state);
2603 trace_nfs4_open_expired(ctx, 0, err);
2604 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2605 continue;
2606 switch (err) {
2607 default:
2608 goto out;
2609 case -NFS4ERR_GRACE:
2610 case -NFS4ERR_DELAY:
2611 nfs4_handle_exception(server, err, &exception);
2612 err = 0;
2613 }
2614 } while (exception.retry);
2615 out:
2616 return err;
2617 }
2618
2619 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2620 {
2621 struct nfs_open_context *ctx;
2622 int ret;
2623
2624 ctx = nfs4_state_find_open_context(state);
2625 if (IS_ERR(ctx))
2626 return -EAGAIN;
2627 ret = nfs4_do_open_expired(ctx, state);
2628 put_nfs_open_context(ctx);
2629 return ret;
2630 }
2631
2632 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2633 const nfs4_stateid *stateid)
2634 {
2635 nfs_remove_bad_delegation(state->inode, stateid);
2636 nfs_state_clear_delegation(state);
2637 }
2638
2639 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2640 {
2641 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2642 nfs_finish_clear_delegation_stateid(state, NULL);
2643 }
2644
2645 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2646 {
2647 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2648 nfs40_clear_delegation_stateid(state);
2649 return nfs4_open_expired(sp, state);
2650 }
2651
2652 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2653 nfs4_stateid *stateid,
2654 struct rpc_cred *cred)
2655 {
2656 return -NFS4ERR_BAD_STATEID;
2657 }
2658
2659 #if defined(CONFIG_NFS_V4_1)
2660 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2661 nfs4_stateid *stateid,
2662 struct rpc_cred *cred)
2663 {
2664 int status;
2665
2666 switch (stateid->type) {
2667 default:
2668 break;
2669 case NFS4_INVALID_STATEID_TYPE:
2670 case NFS4_SPECIAL_STATEID_TYPE:
2671 return -NFS4ERR_BAD_STATEID;
2672 case NFS4_REVOKED_STATEID_TYPE:
2673 goto out_free;
2674 }
2675
2676 status = nfs41_test_stateid(server, stateid, cred);
2677 switch (status) {
2678 case -NFS4ERR_EXPIRED:
2679 case -NFS4ERR_ADMIN_REVOKED:
2680 case -NFS4ERR_DELEG_REVOKED:
2681 break;
2682 default:
2683 return status;
2684 }
2685 out_free:
2686 /* Ack the revoked state to the server */
2687 nfs41_free_stateid(server, stateid, cred, true);
2688 return -NFS4ERR_EXPIRED;
2689 }
2690
2691 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2692 {
2693 struct nfs_server *server = NFS_SERVER(state->inode);
2694 nfs4_stateid stateid;
2695 struct nfs_delegation *delegation;
2696 struct rpc_cred *cred;
2697 int status;
2698
2699 /* Get the delegation credential for use by test/free_stateid */
2700 rcu_read_lock();
2701 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2702 if (delegation == NULL) {
2703 rcu_read_unlock();
2704 nfs_state_clear_delegation(state);
2705 return;
2706 }
2707
2708 nfs4_stateid_copy(&stateid, &delegation->stateid);
2709 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2710 rcu_read_unlock();
2711 nfs_state_clear_delegation(state);
2712 return;
2713 }
2714
2715 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2716 &delegation->flags)) {
2717 rcu_read_unlock();
2718 return;
2719 }
2720
2721 cred = get_rpccred(delegation->cred);
2722 rcu_read_unlock();
2723 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2724 trace_nfs4_test_delegation_stateid(state, NULL, status);
2725 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2726 nfs_finish_clear_delegation_stateid(state, &stateid);
2727
2728 put_rpccred(cred);
2729 }
2730
2731 /**
2732 * nfs41_check_expired_locks - possibly free a lock stateid
2733 *
2734 * @state: NFSv4 state for an inode
2735 *
2736 * Returns NFS_OK if recovery for this stateid is now finished.
2737 * Otherwise a negative NFS4ERR value is returned.
2738 */
2739 static int nfs41_check_expired_locks(struct nfs4_state *state)
2740 {
2741 int status, ret = NFS_OK;
2742 struct nfs4_lock_state *lsp, *prev = NULL;
2743 struct nfs_server *server = NFS_SERVER(state->inode);
2744
2745 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2746 goto out;
2747
2748 spin_lock(&state->state_lock);
2749 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2750 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2751 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2752
2753 refcount_inc(&lsp->ls_count);
2754 spin_unlock(&state->state_lock);
2755
2756 nfs4_put_lock_state(prev);
2757 prev = lsp;
2758
2759 status = nfs41_test_and_free_expired_stateid(server,
2760 &lsp->ls_stateid,
2761 cred);
2762 trace_nfs4_test_lock_stateid(state, lsp, status);
2763 if (status == -NFS4ERR_EXPIRED ||
2764 status == -NFS4ERR_BAD_STATEID) {
2765 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2766 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2767 if (!recover_lost_locks)
2768 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2769 } else if (status != NFS_OK) {
2770 ret = status;
2771 nfs4_put_lock_state(prev);
2772 goto out;
2773 }
2774 spin_lock(&state->state_lock);
2775 }
2776 }
2777 spin_unlock(&state->state_lock);
2778 nfs4_put_lock_state(prev);
2779 out:
2780 return ret;
2781 }
2782
2783 /**
2784 * nfs41_check_open_stateid - possibly free an open stateid
2785 *
2786 * @state: NFSv4 state for an inode
2787 *
2788 * Returns NFS_OK if recovery for this stateid is now finished.
2789 * Otherwise a negative NFS4ERR value is returned.
2790 */
2791 static int nfs41_check_open_stateid(struct nfs4_state *state)
2792 {
2793 struct nfs_server *server = NFS_SERVER(state->inode);
2794 nfs4_stateid *stateid = &state->open_stateid;
2795 struct rpc_cred *cred = state->owner->so_cred;
2796 int status;
2797
2798 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2799 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2800 if (nfs4_have_delegation(state->inode, state->state))
2801 return NFS_OK;
2802 return -NFS4ERR_OPENMODE;
2803 }
2804 return -NFS4ERR_BAD_STATEID;
2805 }
2806 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2807 trace_nfs4_test_open_stateid(state, NULL, status);
2808 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2812 clear_bit(NFS_OPEN_STATE, &state->flags);
2813 stateid->type = NFS4_INVALID_STATEID_TYPE;
2814 return status;
2815 }
2816 if (nfs_open_stateid_recover_openmode(state))
2817 return -NFS4ERR_OPENMODE;
2818 return NFS_OK;
2819 }
2820
2821 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2822 {
2823 int status;
2824
2825 nfs41_check_delegation_stateid(state);
2826 status = nfs41_check_expired_locks(state);
2827 if (status != NFS_OK)
2828 return status;
2829 status = nfs41_check_open_stateid(state);
2830 if (status != NFS_OK)
2831 status = nfs4_open_expired(sp, state);
2832 return status;
2833 }
2834 #endif
2835
2836 /*
2837 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2838 * fields corresponding to attributes that were used to store the verifier.
2839 * Make sure we clobber those fields in the later setattr call
2840 */
2841 static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2842 struct iattr *sattr, struct nfs4_label **label)
2843 {
2844 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask;
2845 __u32 attrset[3];
2846 unsigned ret;
2847 unsigned i;
2848
2849 for (i = 0; i < ARRAY_SIZE(attrset); i++) {
2850 attrset[i] = opendata->o_res.attrset[i];
2851 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1)
2852 attrset[i] &= ~bitmask[i];
2853 }
2854
2855 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ?
2856 sattr->ia_valid : 0;
2857
2858 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) {
2859 if (sattr->ia_valid & ATTR_ATIME_SET)
2860 ret |= ATTR_ATIME_SET;
2861 else
2862 ret |= ATTR_ATIME;
2863 }
2864
2865 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) {
2866 if (sattr->ia_valid & ATTR_MTIME_SET)
2867 ret |= ATTR_MTIME_SET;
2868 else
2869 ret |= ATTR_MTIME;
2870 }
2871
2872 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL))
2873 *label = NULL;
2874 return ret;
2875 }
2876
2877 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2878 fmode_t fmode,
2879 int flags,
2880 struct nfs_open_context *ctx)
2881 {
2882 struct nfs4_state_owner *sp = opendata->owner;
2883 struct nfs_server *server = sp->so_server;
2884 struct dentry *dentry;
2885 struct nfs4_state *state;
2886 unsigned int seq;
2887 int ret;
2888
2889 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2890
2891 ret = _nfs4_proc_open(opendata, ctx);
2892 if (ret != 0)
2893 goto out;
2894
2895 state = _nfs4_opendata_to_nfs4_state(opendata);
2896 ret = PTR_ERR(state);
2897 if (IS_ERR(state))
2898 goto out;
2899 ctx->state = state;
2900 if (server->caps & NFS_CAP_POSIX_LOCK)
2901 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2902 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2903 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2904
2905 dentry = opendata->dentry;
2906 if (d_really_is_negative(dentry)) {
2907 struct dentry *alias;
2908 d_drop(dentry);
2909 alias = d_exact_alias(dentry, state->inode);
2910 if (!alias)
2911 alias = d_splice_alias(igrab(state->inode), dentry);
2912 /* d_splice_alias() can't fail here - it's a non-directory */
2913 if (alias) {
2914 dput(ctx->dentry);
2915 ctx->dentry = dentry = alias;
2916 }
2917 nfs_set_verifier(dentry,
2918 nfs_save_change_attribute(d_inode(opendata->dir)));
2919 }
2920
2921 /* Parse layoutget results before we check for access */
2922 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx);
2923
2924 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2925 if (ret != 0)
2926 goto out;
2927
2928 if (d_inode(dentry) == state->inode) {
2929 nfs_inode_attach_open_context(ctx);
2930 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2931 nfs4_schedule_stateid_recovery(server, state);
2932 }
2933
2934 out:
2935 nfs4_sequence_free_slot(&opendata->o_res.seq_res);
2936 return ret;
2937 }
2938
2939 /*
2940 * Returns a referenced nfs4_state
2941 */
2942 static int _nfs4_do_open(struct inode *dir,
2943 struct nfs_open_context *ctx,
2944 int flags,
2945 const struct nfs4_open_createattrs *c,
2946 int *opened)
2947 {
2948 struct nfs4_state_owner *sp;
2949 struct nfs4_state *state = NULL;
2950 struct nfs_server *server = NFS_SERVER(dir);
2951 struct nfs4_opendata *opendata;
2952 struct dentry *dentry = ctx->dentry;
2953 struct rpc_cred *cred = ctx->cred;
2954 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2955 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2956 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2957 struct iattr *sattr = c->sattr;
2958 struct nfs4_label *label = c->label;
2959 struct nfs4_label *olabel = NULL;
2960 int status;
2961
2962 /* Protect against reboot recovery conflicts */
2963 status = -ENOMEM;
2964 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2965 if (sp == NULL) {
2966 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2967 goto out_err;
2968 }
2969 status = nfs4_client_recover_expired_lease(server->nfs_client);
2970 if (status != 0)
2971 goto err_put_state_owner;
2972 if (d_really_is_positive(dentry))
2973 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2974 status = -ENOMEM;
2975 if (d_really_is_positive(dentry))
2976 claim = NFS4_OPEN_CLAIM_FH;
2977 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
2978 c, claim, GFP_KERNEL);
2979 if (opendata == NULL)
2980 goto err_put_state_owner;
2981
2982 if (label) {
2983 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2984 if (IS_ERR(olabel)) {
2985 status = PTR_ERR(olabel);
2986 goto err_opendata_put;
2987 }
2988 }
2989
2990 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2991 if (!opendata->f_attr.mdsthreshold) {
2992 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2993 if (!opendata->f_attr.mdsthreshold)
2994 goto err_free_label;
2995 }
2996 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2997 }
2998 if (d_really_is_positive(dentry))
2999 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
3000
3001 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
3002 if (status != 0)
3003 goto err_free_label;
3004 state = ctx->state;
3005
3006 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
3007 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
3008 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label);
3009 /*
3010 * send create attributes which was not set by open
3011 * with an extra setattr.
3012 */
3013 if (attrs || label) {
3014 unsigned ia_old = sattr->ia_valid;
3015
3016 sattr->ia_valid = attrs;
3017 nfs_fattr_init(opendata->o_res.f_attr);
3018 status = nfs4_do_setattr(state->inode, cred,
3019 opendata->o_res.f_attr, sattr,
3020 ctx, label, olabel);
3021 if (status == 0) {
3022 nfs_setattr_update_inode(state->inode, sattr,
3023 opendata->o_res.f_attr);
3024 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
3025 }
3026 sattr->ia_valid = ia_old;
3027 }
3028 }
3029 if (opened && opendata->file_created)
3030 *opened = 1;
3031
3032 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
3033 *ctx_th = opendata->f_attr.mdsthreshold;
3034 opendata->f_attr.mdsthreshold = NULL;
3035 }
3036
3037 nfs4_label_free(olabel);
3038
3039 nfs4_opendata_put(opendata);
3040 nfs4_put_state_owner(sp);
3041 return 0;
3042 err_free_label:
3043 nfs4_label_free(olabel);
3044 err_opendata_put:
3045 nfs4_opendata_put(opendata);
3046 err_put_state_owner:
3047 nfs4_put_state_owner(sp);
3048 out_err:
3049 return status;
3050 }
3051
3052
3053 static struct nfs4_state *nfs4_do_open(struct inode *dir,
3054 struct nfs_open_context *ctx,
3055 int flags,
3056 struct iattr *sattr,
3057 struct nfs4_label *label,
3058 int *opened)
3059 {
3060 struct nfs_server *server = NFS_SERVER(dir);
3061 struct nfs4_exception exception = { };
3062 struct nfs4_state *res;
3063 struct nfs4_open_createattrs c = {
3064 .label = label,
3065 .sattr = sattr,
3066 .verf = {
3067 [0] = (__u32)jiffies,
3068 [1] = (__u32)current->pid,
3069 },
3070 };
3071 int status;
3072
3073 do {
3074 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3075 res = ctx->state;
3076 trace_nfs4_open_file(ctx, flags, status);
3077 if (status == 0)
3078 break;
3079 /* NOTE: BAD_SEQID means the server and client disagree about the
3080 * book-keeping w.r.t. state-changing operations
3081 * (OPEN/CLOSE/LOCK/LOCKU...)
3082 * It is actually a sign of a bug on the client or on the server.
3083 *
3084 * If we receive a BAD_SEQID error in the particular case of
3085 * doing an OPEN, we assume that nfs_increment_open_seqid() will
3086 * have unhashed the old state_owner for us, and that we can
3087 * therefore safely retry using a new one. We should still warn
3088 * the user though...
3089 */
3090 if (status == -NFS4ERR_BAD_SEQID) {
3091 pr_warn_ratelimited("NFS: v4 server %s "
3092 " returned a bad sequence-id error!\n",
3093 NFS_SERVER(dir)->nfs_client->cl_hostname);
3094 exception.retry = 1;
3095 continue;
3096 }
3097 /*
3098 * BAD_STATEID on OPEN means that the server cancelled our
3099 * state before it received the OPEN_CONFIRM.
3100 * Recover by retrying the request as per the discussion
3101 * on Page 181 of RFC3530.
3102 */
3103 if (status == -NFS4ERR_BAD_STATEID) {
3104 exception.retry = 1;
3105 continue;
3106 }
3107 if (status == -EAGAIN) {
3108 /* We must have found a delegation */
3109 exception.retry = 1;
3110 continue;
3111 }
3112 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
3113 continue;
3114 res = ERR_PTR(nfs4_handle_exception(server,
3115 status, &exception));
3116 } while (exception.retry);
3117 return res;
3118 }
3119
3120 static int _nfs4_do_setattr(struct inode *inode,
3121 struct nfs_setattrargs *arg,
3122 struct nfs_setattrres *res,
3123 struct rpc_cred *cred,
3124 struct nfs_open_context *ctx)
3125 {
3126 struct nfs_server *server = NFS_SERVER(inode);
3127 struct rpc_message msg = {
3128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
3129 .rpc_argp = arg,
3130 .rpc_resp = res,
3131 .rpc_cred = cred,
3132 };
3133 struct rpc_cred *delegation_cred = NULL;
3134 unsigned long timestamp = jiffies;
3135 bool truncate;
3136 int status;
3137
3138 nfs_fattr_init(res->fattr);
3139
3140 /* Servers should only apply open mode checks for file size changes */
3141 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
3142 if (!truncate)
3143 goto zero_stateid;
3144
3145 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
3146 /* Use that stateid */
3147 } else if (ctx != NULL) {
3148 struct nfs_lock_context *l_ctx;
3149 if (!nfs4_valid_open_stateid(ctx->state))
3150 return -EBADF;
3151 l_ctx = nfs_get_lock_context(ctx);
3152 if (IS_ERR(l_ctx))
3153 return PTR_ERR(l_ctx);
3154 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3155 &arg->stateid, &delegation_cred);
3156 nfs_put_lock_context(l_ctx);
3157 if (status == -EIO)
3158 return -EBADF;
3159 } else {
3160 zero_stateid:
3161 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
3162 }
3163 if (delegation_cred)
3164 msg.rpc_cred = delegation_cred;
3165
3166 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
3167
3168 put_rpccred(delegation_cred);
3169 if (status == 0 && ctx != NULL)
3170 renew_lease(server, timestamp);
3171 trace_nfs4_setattr(inode, &arg->stateid, status);
3172 return status;
3173 }
3174
3175 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
3176 struct nfs_fattr *fattr, struct iattr *sattr,
3177 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
3178 struct nfs4_label *olabel)
3179 {
3180 struct nfs_server *server = NFS_SERVER(inode);
3181 __u32 bitmask[NFS4_BITMASK_SZ];
3182 struct nfs4_state *state = ctx ? ctx->state : NULL;
3183 struct nfs_setattrargs arg = {
3184 .fh = NFS_FH(inode),
3185 .iap = sattr,
3186 .server = server,
3187 .bitmask = bitmask,
3188 .label = ilabel,
3189 };
3190 struct nfs_setattrres res = {
3191 .fattr = fattr,
3192 .label = olabel,
3193 .server = server,
3194 };
3195 struct nfs4_exception exception = {
3196 .state = state,
3197 .inode = inode,
3198 .stateid = &arg.stateid,
3199 };
3200 int err;
3201
3202 do {
3203 nfs4_bitmap_copy_adjust_setattr(bitmask,
3204 nfs4_bitmask(server, olabel),
3205 inode);
3206
3207 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3208 switch (err) {
3209 case -NFS4ERR_OPENMODE:
3210 if (!(sattr->ia_valid & ATTR_SIZE)) {
3211 pr_warn_once("NFSv4: server %s is incorrectly "
3212 "applying open mode checks to "
3213 "a SETATTR that is not "
3214 "changing file size.\n",
3215 server->nfs_client->cl_hostname);
3216 }
3217 if (state && !(state->state & FMODE_WRITE)) {
3218 err = -EBADF;
3219 if (sattr->ia_valid & ATTR_OPEN)
3220 err = -EACCES;
3221 goto out;
3222 }
3223 }
3224 err = nfs4_handle_exception(server, err, &exception);
3225 } while (exception.retry);
3226 out:
3227 return err;
3228 }
3229
3230 static bool
3231 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3232 {
3233 if (inode == NULL || !nfs_have_layout(inode))
3234 return false;
3235
3236 return pnfs_wait_on_layoutreturn(inode, task);
3237 }
3238
3239 struct nfs4_closedata {
3240 struct inode *inode;
3241 struct nfs4_state *state;
3242 struct nfs_closeargs arg;
3243 struct nfs_closeres res;
3244 struct {
3245 struct nfs4_layoutreturn_args arg;
3246 struct nfs4_layoutreturn_res res;
3247 struct nfs4_xdr_opaque_data ld_private;
3248 u32 roc_barrier;
3249 bool roc;
3250 } lr;
3251 struct nfs_fattr fattr;
3252 unsigned long timestamp;
3253 };
3254
3255 static void nfs4_free_closedata(void *data)
3256 {
3257 struct nfs4_closedata *calldata = data;
3258 struct nfs4_state_owner *sp = calldata->state->owner;
3259 struct super_block *sb = calldata->state->inode->i_sb;
3260
3261 if (calldata->lr.roc)
3262 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3263 calldata->res.lr_ret);
3264 nfs4_put_open_state(calldata->state);
3265 nfs_free_seqid(calldata->arg.seqid);
3266 nfs4_put_state_owner(sp);
3267 nfs_sb_deactive(sb);
3268 kfree(calldata);
3269 }
3270
3271 static void nfs4_close_done(struct rpc_task *task, void *data)
3272 {
3273 struct nfs4_closedata *calldata = data;
3274 struct nfs4_state *state = calldata->state;
3275 struct nfs_server *server = NFS_SERVER(calldata->inode);
3276 nfs4_stateid *res_stateid = NULL;
3277 struct nfs4_exception exception = {
3278 .state = state,
3279 .inode = calldata->inode,
3280 .stateid = &calldata->arg.stateid,
3281 };
3282
3283 dprintk("%s: begin!\n", __func__);
3284 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3285 return;
3286 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3287
3288 /* Handle Layoutreturn errors */
3289 if (calldata->arg.lr_args && task->tk_status != 0) {
3290 switch (calldata->res.lr_ret) {
3291 default:
3292 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3293 break;
3294 case 0:
3295 calldata->arg.lr_args = NULL;
3296 calldata->res.lr_res = NULL;
3297 break;
3298 case -NFS4ERR_OLD_STATEID:
3299 if (nfs4_layoutreturn_refresh_stateid(&calldata->arg.lr_args->stateid,
3300 &calldata->arg.lr_args->range,
3301 calldata->inode))
3302 goto lr_restart;
3303 /* Fallthrough */
3304 case -NFS4ERR_ADMIN_REVOKED:
3305 case -NFS4ERR_DELEG_REVOKED:
3306 case -NFS4ERR_EXPIRED:
3307 case -NFS4ERR_BAD_STATEID:
3308 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3309 case -NFS4ERR_WRONG_CRED:
3310 calldata->arg.lr_args = NULL;
3311 calldata->res.lr_res = NULL;
3312 goto lr_restart;
3313 }
3314 }
3315
3316 /* hmm. we are done with the inode, and in the process of freeing
3317 * the state_owner. we keep this around to process errors
3318 */
3319 switch (task->tk_status) {
3320 case 0:
3321 res_stateid = &calldata->res.stateid;
3322 renew_lease(server, calldata->timestamp);
3323 break;
3324 case -NFS4ERR_ACCESS:
3325 if (calldata->arg.bitmask != NULL) {
3326 calldata->arg.bitmask = NULL;
3327 calldata->res.fattr = NULL;
3328 goto out_restart;
3329
3330 }
3331 break;
3332 case -NFS4ERR_OLD_STATEID:
3333 /* Did we race with OPEN? */
3334 if (nfs4_refresh_open_stateid(&calldata->arg.stateid,
3335 state))
3336 goto out_restart;
3337 goto out_release;
3338 case -NFS4ERR_ADMIN_REVOKED:
3339 case -NFS4ERR_STALE_STATEID:
3340 case -NFS4ERR_EXPIRED:
3341 nfs4_free_revoked_stateid(server,
3342 &calldata->arg.stateid,
3343 task->tk_msg.rpc_cred);
3344 /* Fallthrough */
3345 case -NFS4ERR_BAD_STATEID:
3346 break;
3347 default:
3348 task->tk_status = nfs4_async_handle_exception(task,
3349 server, task->tk_status, &exception);
3350 if (exception.retry)
3351 goto out_restart;
3352 }
3353 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3354 res_stateid, calldata->arg.fmode);
3355 out_release:
3356 task->tk_status = 0;
3357 nfs_release_seqid(calldata->arg.seqid);
3358 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3359 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3360 return;
3361 lr_restart:
3362 calldata->res.lr_ret = 0;
3363 out_restart:
3364 task->tk_status = 0;
3365 rpc_restart_call_prepare(task);
3366 goto out_release;
3367 }
3368
3369 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3370 {
3371 struct nfs4_closedata *calldata = data;
3372 struct nfs4_state *state = calldata->state;
3373 struct inode *inode = calldata->inode;
3374 struct pnfs_layout_hdr *lo;
3375 bool is_rdonly, is_wronly, is_rdwr;
3376 int call_close = 0;
3377
3378 dprintk("%s: begin!\n", __func__);
3379 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3380 goto out_wait;
3381
3382 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3383 spin_lock(&state->owner->so_lock);
3384 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3385 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3386 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3387 /* Calculate the change in open mode */
3388 calldata->arg.fmode = 0;
3389 if (state->n_rdwr == 0) {
3390 if (state->n_rdonly == 0)
3391 call_close |= is_rdonly;
3392 else if (is_rdonly)
3393 calldata->arg.fmode |= FMODE_READ;
3394 if (state->n_wronly == 0)
3395 call_close |= is_wronly;
3396 else if (is_wronly)
3397 calldata->arg.fmode |= FMODE_WRITE;
3398 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3399 call_close |= is_rdwr;
3400 } else if (is_rdwr)
3401 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3402
3403 if (!nfs4_valid_open_stateid(state) ||
3404 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state))
3405 call_close = 0;
3406 spin_unlock(&state->owner->so_lock);
3407
3408 if (!call_close) {
3409 /* Note: exit _without_ calling nfs4_close_done */
3410 goto out_no_action;
3411 }
3412
3413 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3414 nfs_release_seqid(calldata->arg.seqid);
3415 goto out_wait;
3416 }
3417
3418 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL;
3419 if (lo && !pnfs_layout_is_valid(lo)) {
3420 calldata->arg.lr_args = NULL;
3421 calldata->res.lr_res = NULL;
3422 }
3423
3424 if (calldata->arg.fmode == 0)
3425 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3426
3427 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3428 /* Close-to-open cache consistency revalidation */
3429 if (!nfs4_have_delegation(inode, FMODE_READ))
3430 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3431 else
3432 calldata->arg.bitmask = NULL;
3433 }
3434
3435 calldata->arg.share_access =
3436 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3437 calldata->arg.fmode, 0);
3438
3439 if (calldata->res.fattr == NULL)
3440 calldata->arg.bitmask = NULL;
3441 else if (calldata->arg.bitmask == NULL)
3442 calldata->res.fattr = NULL;
3443 calldata->timestamp = jiffies;
3444 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3445 &calldata->arg.seq_args,
3446 &calldata->res.seq_res,
3447 task) != 0)
3448 nfs_release_seqid(calldata->arg.seqid);
3449 dprintk("%s: done!\n", __func__);
3450 return;
3451 out_no_action:
3452 task->tk_action = NULL;
3453 out_wait:
3454 nfs4_sequence_done(task, &calldata->res.seq_res);
3455 }
3456
3457 static const struct rpc_call_ops nfs4_close_ops = {
3458 .rpc_call_prepare = nfs4_close_prepare,
3459 .rpc_call_done = nfs4_close_done,
3460 .rpc_release = nfs4_free_closedata,
3461 };
3462
3463 /*
3464 * It is possible for data to be read/written from a mem-mapped file
3465 * after the sys_close call (which hits the vfs layer as a flush).
3466 * This means that we can't safely call nfsv4 close on a file until
3467 * the inode is cleared. This in turn means that we are not good
3468 * NFSv4 citizens - we do not indicate to the server to update the file's
3469 * share state even when we are done with one of the three share
3470 * stateid's in the inode.
3471 *
3472 * NOTE: Caller must be holding the sp->so_owner semaphore!
3473 */
3474 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3475 {
3476 struct nfs_server *server = NFS_SERVER(state->inode);
3477 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3478 struct nfs4_closedata *calldata;
3479 struct nfs4_state_owner *sp = state->owner;
3480 struct rpc_task *task;
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3483 .rpc_cred = state->owner->so_cred,
3484 };
3485 struct rpc_task_setup task_setup_data = {
3486 .rpc_client = server->client,
3487 .rpc_message = &msg,
3488 .callback_ops = &nfs4_close_ops,
3489 .workqueue = nfsiod_workqueue,
3490 .flags = RPC_TASK_ASYNC,
3491 };
3492 int status = -ENOMEM;
3493
3494 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3495 &task_setup_data.rpc_client, &msg);
3496
3497 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3498 if (calldata == NULL)
3499 goto out;
3500 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0);
3501 calldata->inode = state->inode;
3502 calldata->state = state;
3503 calldata->arg.fh = NFS_FH(state->inode);
3504 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3505 goto out_free_calldata;
3506 /* Serialization for the sequence id */
3507 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3508 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3509 if (IS_ERR(calldata->arg.seqid))
3510 goto out_free_calldata;
3511 nfs_fattr_init(&calldata->fattr);
3512 calldata->arg.fmode = 0;
3513 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3514 calldata->res.fattr = &calldata->fattr;
3515 calldata->res.seqid = calldata->arg.seqid;
3516 calldata->res.server = server;
3517 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3518 calldata->lr.roc = pnfs_roc(state->inode,
3519 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3520 if (calldata->lr.roc) {
3521 calldata->arg.lr_args = &calldata->lr.arg;
3522 calldata->res.lr_res = &calldata->lr.res;
3523 }
3524 nfs_sb_active(calldata->inode->i_sb);
3525
3526 msg.rpc_argp = &calldata->arg;
3527 msg.rpc_resp = &calldata->res;
3528 task_setup_data.callback_data = calldata;
3529 task = rpc_run_task(&task_setup_data);
3530 if (IS_ERR(task))
3531 return PTR_ERR(task);
3532 status = 0;
3533 if (wait)
3534 status = rpc_wait_for_completion_task(task);
3535 rpc_put_task(task);
3536 return status;
3537 out_free_calldata:
3538 kfree(calldata);
3539 out:
3540 nfs4_put_open_state(state);
3541 nfs4_put_state_owner(sp);
3542 return status;
3543 }
3544
3545 static struct inode *
3546 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3547 int open_flags, struct iattr *attr, int *opened)
3548 {
3549 struct nfs4_state *state;
3550 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3551
3552 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3553
3554 /* Protect against concurrent sillydeletes */
3555 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3556
3557 nfs4_label_release_security(label);
3558
3559 if (IS_ERR(state))
3560 return ERR_CAST(state);
3561 return state->inode;
3562 }
3563
3564 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3565 {
3566 if (ctx->state == NULL)
3567 return;
3568 if (is_sync)
3569 nfs4_close_sync(ctx->state, ctx->mode);
3570 else
3571 nfs4_close_state(ctx->state, ctx->mode);
3572 }
3573
3574 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3575 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3576 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3577
3578 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3579 {
3580 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3581 struct nfs4_server_caps_arg args = {
3582 .fhandle = fhandle,
3583 .bitmask = bitmask,
3584 };
3585 struct nfs4_server_caps_res res = {};
3586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3588 .rpc_argp = &args,
3589 .rpc_resp = &res,
3590 };
3591 int status;
3592 int i;
3593
3594 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3595 FATTR4_WORD0_FH_EXPIRE_TYPE |
3596 FATTR4_WORD0_LINK_SUPPORT |
3597 FATTR4_WORD0_SYMLINK_SUPPORT |
3598 FATTR4_WORD0_ACLSUPPORT;
3599 if (minorversion)
3600 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3601
3602 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3603 if (status == 0) {
3604 /* Sanity check the server answers */
3605 switch (minorversion) {
3606 case 0:
3607 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3608 res.attr_bitmask[2] = 0;
3609 break;
3610 case 1:
3611 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3612 break;
3613 case 2:
3614 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3615 }
3616 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3617 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3618 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3619 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3620 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3621 NFS_CAP_CTIME|NFS_CAP_MTIME|
3622 NFS_CAP_SECURITY_LABEL);
3623 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3624 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3625 server->caps |= NFS_CAP_ACLS;
3626 if (res.has_links != 0)
3627 server->caps |= NFS_CAP_HARDLINKS;
3628 if (res.has_symlinks != 0)
3629 server->caps |= NFS_CAP_SYMLINKS;
3630 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3631 server->caps |= NFS_CAP_FILEID;
3632 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3633 server->caps |= NFS_CAP_MODE;
3634 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3635 server->caps |= NFS_CAP_NLINK;
3636 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3637 server->caps |= NFS_CAP_OWNER;
3638 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3639 server->caps |= NFS_CAP_OWNER_GROUP;
3640 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3641 server->caps |= NFS_CAP_ATIME;
3642 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3643 server->caps |= NFS_CAP_CTIME;
3644 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3645 server->caps |= NFS_CAP_MTIME;
3646 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3647 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3648 server->caps |= NFS_CAP_SECURITY_LABEL;
3649 #endif
3650 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3651 sizeof(server->attr_bitmask));
3652 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3653
3654 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3655 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3656 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3657 server->cache_consistency_bitmask[2] = 0;
3658
3659 /* Avoid a regression due to buggy server */
3660 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3661 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
3662 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3663 sizeof(server->exclcreat_bitmask));
3664
3665 server->acl_bitmask = res.acl_bitmask;
3666 server->fh_expire_type = res.fh_expire_type;
3667 }
3668
3669 return status;
3670 }
3671
3672 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3673 {
3674 struct nfs4_exception exception = { };
3675 int err;
3676 do {
3677 err = nfs4_handle_exception(server,
3678 _nfs4_server_capabilities(server, fhandle),
3679 &exception);
3680 } while (exception.retry);
3681 return err;
3682 }
3683
3684 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3685 struct nfs_fsinfo *info)
3686 {
3687 u32 bitmask[3];
3688 struct nfs4_lookup_root_arg args = {
3689 .bitmask = bitmask,
3690 };
3691 struct nfs4_lookup_res res = {
3692 .server = server,
3693 .fattr = info->fattr,
3694 .fh = fhandle,
3695 };
3696 struct rpc_message msg = {
3697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3698 .rpc_argp = &args,
3699 .rpc_resp = &res,
3700 };
3701
3702 bitmask[0] = nfs4_fattr_bitmap[0];
3703 bitmask[1] = nfs4_fattr_bitmap[1];
3704 /*
3705 * Process the label in the upcoming getfattr
3706 */
3707 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3708
3709 nfs_fattr_init(info->fattr);
3710 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3711 }
3712
3713 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3714 struct nfs_fsinfo *info)
3715 {
3716 struct nfs4_exception exception = { };
3717 int err;
3718 do {
3719 err = _nfs4_lookup_root(server, fhandle, info);
3720 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3721 switch (err) {
3722 case 0:
3723 case -NFS4ERR_WRONGSEC:
3724 goto out;
3725 default:
3726 err = nfs4_handle_exception(server, err, &exception);
3727 }
3728 } while (exception.retry);
3729 out:
3730 return err;
3731 }
3732
3733 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3734 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3735 {
3736 struct rpc_auth_create_args auth_args = {
3737 .pseudoflavor = flavor,
3738 };
3739 struct rpc_auth *auth;
3740
3741 auth = rpcauth_create(&auth_args, server->client);
3742 if (IS_ERR(auth))
3743 return -EACCES;
3744 return nfs4_lookup_root(server, fhandle, info);
3745 }
3746
3747 /*
3748 * Retry pseudoroot lookup with various security flavors. We do this when:
3749 *
3750 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3751 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3752 *
3753 * Returns zero on success, or a negative NFS4ERR value, or a
3754 * negative errno value.
3755 */
3756 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3757 struct nfs_fsinfo *info)
3758 {
3759 /* Per 3530bis 15.33.5 */
3760 static const rpc_authflavor_t flav_array[] = {
3761 RPC_AUTH_GSS_KRB5P,
3762 RPC_AUTH_GSS_KRB5I,
3763 RPC_AUTH_GSS_KRB5,
3764 RPC_AUTH_UNIX, /* courtesy */
3765 RPC_AUTH_NULL,
3766 };
3767 int status = -EPERM;
3768 size_t i;
3769
3770 if (server->auth_info.flavor_len > 0) {
3771 /* try each flavor specified by user */
3772 for (i = 0; i < server->auth_info.flavor_len; i++) {
3773 status = nfs4_lookup_root_sec(server, fhandle, info,
3774 server->auth_info.flavors[i]);
3775 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3776 continue;
3777 break;
3778 }
3779 } else {
3780 /* no flavors specified by user, try default list */
3781 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3782 status = nfs4_lookup_root_sec(server, fhandle, info,
3783 flav_array[i]);
3784 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3785 continue;
3786 break;
3787 }
3788 }
3789
3790 /*
3791 * -EACCES could mean that the user doesn't have correct permissions
3792 * to access the mount. It could also mean that we tried to mount
3793 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3794 * existing mount programs don't handle -EACCES very well so it should
3795 * be mapped to -EPERM instead.
3796 */
3797 if (status == -EACCES)
3798 status = -EPERM;
3799 return status;
3800 }
3801
3802 /**
3803 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3804 * @server: initialized nfs_server handle
3805 * @fhandle: we fill in the pseudo-fs root file handle
3806 * @info: we fill in an FSINFO struct
3807 * @auth_probe: probe the auth flavours
3808 *
3809 * Returns zero on success, or a negative errno.
3810 */
3811 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3812 struct nfs_fsinfo *info,
3813 bool auth_probe)
3814 {
3815 int status = 0;
3816
3817 if (!auth_probe)
3818 status = nfs4_lookup_root(server, fhandle, info);
3819
3820 if (auth_probe || status == NFS4ERR_WRONGSEC)
3821 status = server->nfs_client->cl_mvops->find_root_sec(server,
3822 fhandle, info);
3823
3824 if (status == 0)
3825 status = nfs4_server_capabilities(server, fhandle);
3826 if (status == 0)
3827 status = nfs4_do_fsinfo(server, fhandle, info);
3828
3829 return nfs4_map_errors(status);
3830 }
3831
3832 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3833 struct nfs_fsinfo *info)
3834 {
3835 int error;
3836 struct nfs_fattr *fattr = info->fattr;
3837 struct nfs4_label *label = NULL;
3838
3839 error = nfs4_server_capabilities(server, mntfh);
3840 if (error < 0) {
3841 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3842 return error;
3843 }
3844
3845 label = nfs4_label_alloc(server, GFP_KERNEL);
3846 if (IS_ERR(label))
3847 return PTR_ERR(label);
3848
3849 error = nfs4_proc_getattr(server, mntfh, fattr, label, NULL);
3850 if (error < 0) {
3851 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3852 goto err_free_label;
3853 }
3854
3855 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3856 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3857 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3858
3859 err_free_label:
3860 nfs4_label_free(label);
3861
3862 return error;
3863 }
3864
3865 /*
3866 * Get locations and (maybe) other attributes of a referral.
3867 * Note that we'll actually follow the referral later when
3868 * we detect fsid mismatch in inode revalidation
3869 */
3870 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3871 const struct qstr *name, struct nfs_fattr *fattr,
3872 struct nfs_fh *fhandle)
3873 {
3874 int status = -ENOMEM;
3875 struct page *page = NULL;
3876 struct nfs4_fs_locations *locations = NULL;
3877
3878 page = alloc_page(GFP_KERNEL);
3879 if (page == NULL)
3880 goto out;
3881 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3882 if (locations == NULL)
3883 goto out;
3884
3885 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3886 if (status != 0)
3887 goto out;
3888
3889 /*
3890 * If the fsid didn't change, this is a migration event, not a
3891 * referral. Cause us to drop into the exception handler, which
3892 * will kick off migration recovery.
3893 */
3894 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3895 dprintk("%s: server did not return a different fsid for"
3896 " a referral at %s\n", __func__, name->name);
3897 status = -NFS4ERR_MOVED;
3898 goto out;
3899 }
3900 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3901 nfs_fixup_referral_attributes(&locations->fattr);
3902
3903 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3904 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3905 memset(fhandle, 0, sizeof(struct nfs_fh));
3906 out:
3907 if (page)
3908 __free_page(page);
3909 kfree(locations);
3910 return status;
3911 }
3912
3913 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3914 struct nfs_fattr *fattr, struct nfs4_label *label,
3915 struct inode *inode)
3916 {
3917 __u32 bitmask[NFS4_BITMASK_SZ];
3918 struct nfs4_getattr_arg args = {
3919 .fh = fhandle,
3920 .bitmask = bitmask,
3921 };
3922 struct nfs4_getattr_res res = {
3923 .fattr = fattr,
3924 .label = label,
3925 .server = server,
3926 };
3927 struct rpc_message msg = {
3928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3929 .rpc_argp = &args,
3930 .rpc_resp = &res,
3931 };
3932
3933 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, label), inode);
3934
3935 nfs_fattr_init(fattr);
3936 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3937 }
3938
3939 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3940 struct nfs_fattr *fattr, struct nfs4_label *label,
3941 struct inode *inode)
3942 {
3943 struct nfs4_exception exception = { };
3944 int err;
3945 do {
3946 err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
3947 trace_nfs4_getattr(server, fhandle, fattr, err);
3948 err = nfs4_handle_exception(server, err,
3949 &exception);
3950 } while (exception.retry);
3951 return err;
3952 }
3953
3954 /*
3955 * The file is not closed if it is opened due to the a request to change
3956 * the size of the file. The open call will not be needed once the
3957 * VFS layer lookup-intents are implemented.
3958 *
3959 * Close is called when the inode is destroyed.
3960 * If we haven't opened the file for O_WRONLY, we
3961 * need to in the size_change case to obtain a stateid.
3962 *
3963 * Got race?
3964 * Because OPEN is always done by name in nfsv4, it is
3965 * possible that we opened a different file by the same
3966 * name. We can recognize this race condition, but we
3967 * can't do anything about it besides returning an error.
3968 *
3969 * This will be fixed with VFS changes (lookup-intent).
3970 */
3971 static int
3972 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3973 struct iattr *sattr)
3974 {
3975 struct inode *inode = d_inode(dentry);
3976 struct rpc_cred *cred = NULL;
3977 struct nfs_open_context *ctx = NULL;
3978 struct nfs4_label *label = NULL;
3979 int status;
3980
3981 if (pnfs_ld_layoutret_on_setattr(inode) &&
3982 sattr->ia_valid & ATTR_SIZE &&
3983 sattr->ia_size < i_size_read(inode))
3984 pnfs_commit_and_return_layout(inode);
3985
3986 nfs_fattr_init(fattr);
3987
3988 /* Deal with open(O_TRUNC) */
3989 if (sattr->ia_valid & ATTR_OPEN)
3990 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3991
3992 /* Optimization: if the end result is no change, don't RPC */
3993 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3994 return 0;
3995
3996 /* Search for an existing open(O_WRITE) file */
3997 if (sattr->ia_valid & ATTR_FILE) {
3998
3999 ctx = nfs_file_open_context(sattr->ia_file);
4000 if (ctx)
4001 cred = ctx->cred;
4002 }
4003
4004 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4005 if (IS_ERR(label))
4006 return PTR_ERR(label);
4007
4008 /* Return any delegations if we're going to change ACLs */
4009 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
4010 nfs4_inode_make_writeable(inode);
4011
4012 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
4013 if (status == 0) {
4014 nfs_setattr_update_inode(inode, sattr, fattr);
4015 nfs_setsecurity(inode, fattr, label);
4016 }
4017 nfs4_label_free(label);
4018 return status;
4019 }
4020
4021 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
4022 const struct qstr *name, struct nfs_fh *fhandle,
4023 struct nfs_fattr *fattr, struct nfs4_label *label)
4024 {
4025 struct nfs_server *server = NFS_SERVER(dir);
4026 int status;
4027 struct nfs4_lookup_arg args = {
4028 .bitmask = server->attr_bitmask,
4029 .dir_fh = NFS_FH(dir),
4030 .name = name,
4031 };
4032 struct nfs4_lookup_res res = {
4033 .server = server,
4034 .fattr = fattr,
4035 .label = label,
4036 .fh = fhandle,
4037 };
4038 struct rpc_message msg = {
4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
4040 .rpc_argp = &args,
4041 .rpc_resp = &res,
4042 };
4043
4044 args.bitmask = nfs4_bitmask(server, label);
4045
4046 nfs_fattr_init(fattr);
4047
4048 dprintk("NFS call lookup %s\n", name->name);
4049 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
4050 dprintk("NFS reply lookup: %d\n", status);
4051 return status;
4052 }
4053
4054 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
4055 {
4056 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4057 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
4058 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4059 fattr->nlink = 2;
4060 }
4061
4062 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
4063 const struct qstr *name, struct nfs_fh *fhandle,
4064 struct nfs_fattr *fattr, struct nfs4_label *label)
4065 {
4066 struct nfs4_exception exception = { };
4067 struct rpc_clnt *client = *clnt;
4068 int err;
4069 do {
4070 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
4071 trace_nfs4_lookup(dir, name, err);
4072 switch (err) {
4073 case -NFS4ERR_BADNAME:
4074 err = -ENOENT;
4075 goto out;
4076 case -NFS4ERR_MOVED:
4077 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
4078 if (err == -NFS4ERR_MOVED)
4079 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4080 goto out;
4081 case -NFS4ERR_WRONGSEC:
4082 err = -EPERM;
4083 if (client != *clnt)
4084 goto out;
4085 client = nfs4_negotiate_security(client, dir, name);
4086 if (IS_ERR(client))
4087 return PTR_ERR(client);
4088
4089 exception.retry = 1;
4090 break;
4091 default:
4092 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
4093 }
4094 } while (exception.retry);
4095
4096 out:
4097 if (err == 0)
4098 *clnt = client;
4099 else if (client != *clnt)
4100 rpc_shutdown_client(client);
4101
4102 return err;
4103 }
4104
4105 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
4106 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4107 struct nfs4_label *label)
4108 {
4109 int status;
4110 struct rpc_clnt *client = NFS_CLIENT(dir);
4111
4112 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
4113 if (client != NFS_CLIENT(dir)) {
4114 rpc_shutdown_client(client);
4115 nfs_fixup_secinfo_attributes(fattr);
4116 }
4117 return status;
4118 }
4119
4120 struct rpc_clnt *
4121 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
4122 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
4123 {
4124 struct rpc_clnt *client = NFS_CLIENT(dir);
4125 int status;
4126
4127 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
4128 if (status < 0)
4129 return ERR_PTR(status);
4130 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
4131 }
4132
4133 static int _nfs4_proc_lookupp(struct inode *inode,
4134 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
4135 struct nfs4_label *label)
4136 {
4137 struct rpc_clnt *clnt = NFS_CLIENT(inode);
4138 struct nfs_server *server = NFS_SERVER(inode);
4139 int status;
4140 struct nfs4_lookupp_arg args = {
4141 .bitmask = server->attr_bitmask,
4142 .fh = NFS_FH(inode),
4143 };
4144 struct nfs4_lookupp_res res = {
4145 .server = server,
4146 .fattr = fattr,
4147 .label = label,
4148 .fh = fhandle,
4149 };
4150 struct rpc_message msg = {
4151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4152 .rpc_argp = &args,
4153 .rpc_resp = &res,
4154 };
4155
4156 args.bitmask = nfs4_bitmask(server, label);
4157
4158 nfs_fattr_init(fattr);
4159
4160 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4161 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4162 &res.seq_res, 0);
4163 dprintk("NFS reply lookupp: %d\n", status);
4164 return status;
4165 }
4166
4167 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4168 struct nfs_fattr *fattr, struct nfs4_label *label)
4169 {
4170 struct nfs4_exception exception = { };
4171 int err;
4172 do {
4173 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4174 trace_nfs4_lookupp(inode, err);
4175 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4176 &exception);
4177 } while (exception.retry);
4178 return err;
4179 }
4180
4181 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4182 {
4183 struct nfs_server *server = NFS_SERVER(inode);
4184 struct nfs4_accessargs args = {
4185 .fh = NFS_FH(inode),
4186 .access = entry->mask,
4187 };
4188 struct nfs4_accessres res = {
4189 .server = server,
4190 };
4191 struct rpc_message msg = {
4192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4193 .rpc_argp = &args,
4194 .rpc_resp = &res,
4195 .rpc_cred = entry->cred,
4196 };
4197 int status = 0;
4198
4199 if (!nfs4_have_delegation(inode, FMODE_READ)) {
4200 res.fattr = nfs_alloc_fattr();
4201 if (res.fattr == NULL)
4202 return -ENOMEM;
4203 args.bitmask = server->cache_consistency_bitmask;
4204 }
4205
4206 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4207 if (!status) {
4208 nfs_access_set_mask(entry, res.access);
4209 if (res.fattr)
4210 nfs_refresh_inode(inode, res.fattr);
4211 }
4212 nfs_free_fattr(res.fattr);
4213 return status;
4214 }
4215
4216 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4217 {
4218 struct nfs4_exception exception = { };
4219 int err;
4220 do {
4221 err = _nfs4_proc_access(inode, entry);
4222 trace_nfs4_access(inode, err);
4223 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4224 &exception);
4225 } while (exception.retry);
4226 return err;
4227 }
4228
4229 /*
4230 * TODO: For the time being, we don't try to get any attributes
4231 * along with any of the zero-copy operations READ, READDIR,
4232 * READLINK, WRITE.
4233 *
4234 * In the case of the first three, we want to put the GETATTR
4235 * after the read-type operation -- this is because it is hard
4236 * to predict the length of a GETATTR response in v4, and thus
4237 * align the READ data correctly. This means that the GETATTR
4238 * may end up partially falling into the page cache, and we should
4239 * shift it into the 'tail' of the xdr_buf before processing.
4240 * To do this efficiently, we need to know the total length
4241 * of data received, which doesn't seem to be available outside
4242 * of the RPC layer.
4243 *
4244 * In the case of WRITE, we also want to put the GETATTR after
4245 * the operation -- in this case because we want to make sure
4246 * we get the post-operation mtime and size.
4247 *
4248 * Both of these changes to the XDR layer would in fact be quite
4249 * minor, but I decided to leave them for a subsequent patch.
4250 */
4251 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4252 unsigned int pgbase, unsigned int pglen)
4253 {
4254 struct nfs4_readlink args = {
4255 .fh = NFS_FH(inode),
4256 .pgbase = pgbase,
4257 .pglen = pglen,
4258 .pages = &page,
4259 };
4260 struct nfs4_readlink_res res;
4261 struct rpc_message msg = {
4262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4263 .rpc_argp = &args,
4264 .rpc_resp = &res,
4265 };
4266
4267 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4268 }
4269
4270 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4271 unsigned int pgbase, unsigned int pglen)
4272 {
4273 struct nfs4_exception exception = { };
4274 int err;
4275 do {
4276 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4277 trace_nfs4_readlink(inode, err);
4278 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4279 &exception);
4280 } while (exception.retry);
4281 return err;
4282 }
4283
4284 /*
4285 * This is just for mknod. open(O_CREAT) will always do ->open_context().
4286 */
4287 static int
4288 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4289 int flags)
4290 {
4291 struct nfs_server *server = NFS_SERVER(dir);
4292 struct nfs4_label l, *ilabel = NULL;
4293 struct nfs_open_context *ctx;
4294 struct nfs4_state *state;
4295 int status = 0;
4296
4297 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4298 if (IS_ERR(ctx))
4299 return PTR_ERR(ctx);
4300
4301 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4302
4303 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4304 sattr->ia_mode &= ~current_umask();
4305 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4306 if (IS_ERR(state)) {
4307 status = PTR_ERR(state);
4308 goto out;
4309 }
4310 out:
4311 nfs4_label_release_security(ilabel);
4312 put_nfs_open_context(ctx);
4313 return status;
4314 }
4315
4316 static int
4317 _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
4318 {
4319 struct nfs_server *server = NFS_SERVER(dir);
4320 struct nfs_removeargs args = {
4321 .fh = NFS_FH(dir),
4322 .name = *name,
4323 };
4324 struct nfs_removeres res = {
4325 .server = server,
4326 };
4327 struct rpc_message msg = {
4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4329 .rpc_argp = &args,
4330 .rpc_resp = &res,
4331 };
4332 unsigned long timestamp = jiffies;
4333 int status;
4334
4335 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4336 if (status == 0) {
4337 spin_lock(&dir->i_lock);
4338 update_changeattr_locked(dir, &res.cinfo, timestamp, 0);
4339 /* Removing a directory decrements nlink in the parent */
4340 if (ftype == NF4DIR && dir->i_nlink > 2)
4341 nfs4_dec_nlink_locked(dir);
4342 spin_unlock(&dir->i_lock);
4343 }
4344 return status;
4345 }
4346
4347 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
4348 {
4349 struct nfs4_exception exception = { };
4350 struct inode *inode = d_inode(dentry);
4351 int err;
4352
4353 if (inode) {
4354 if (inode->i_nlink == 1)
4355 nfs4_inode_return_delegation(inode);
4356 else
4357 nfs4_inode_make_writeable(inode);
4358 }
4359 do {
4360 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG);
4361 trace_nfs4_remove(dir, &dentry->d_name, err);
4362 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4363 &exception);
4364 } while (exception.retry);
4365 return err;
4366 }
4367
4368 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
4369 {
4370 struct nfs4_exception exception = { };
4371 int err;
4372
4373 do {
4374 err = _nfs4_proc_remove(dir, name, NF4DIR);
4375 trace_nfs4_remove(dir, name, err);
4376 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4377 &exception);
4378 } while (exception.retry);
4379 return err;
4380 }
4381
4382 static void nfs4_proc_unlink_setup(struct rpc_message *msg,
4383 struct dentry *dentry,
4384 struct inode *inode)
4385 {
4386 struct nfs_removeargs *args = msg->rpc_argp;
4387 struct nfs_removeres *res = msg->rpc_resp;
4388
4389 res->server = NFS_SB(dentry->d_sb);
4390 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4391 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0);
4392
4393 nfs_fattr_init(res->dir_attr);
4394
4395 if (inode)
4396 nfs4_inode_return_delegation(inode);
4397 }
4398
4399 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4400 {
4401 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
4402 &data->args.seq_args,
4403 &data->res.seq_res,
4404 task);
4405 }
4406
4407 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4408 {
4409 struct nfs_unlinkdata *data = task->tk_calldata;
4410 struct nfs_removeres *res = &data->res;
4411
4412 if (!nfs4_sequence_done(task, &res->seq_res))
4413 return 0;
4414 if (nfs4_async_handle_error(task, res->server, NULL,
4415 &data->timeout) == -EAGAIN)
4416 return 0;
4417 if (task->tk_status == 0)
4418 update_changeattr(dir, &res->cinfo,
4419 res->dir_attr->time_start, 0);
4420 return 1;
4421 }
4422
4423 static void nfs4_proc_rename_setup(struct rpc_message *msg,
4424 struct dentry *old_dentry,
4425 struct dentry *new_dentry)
4426 {
4427 struct nfs_renameargs *arg = msg->rpc_argp;
4428 struct nfs_renameres *res = msg->rpc_resp;
4429 struct inode *old_inode = d_inode(old_dentry);
4430 struct inode *new_inode = d_inode(new_dentry);
4431
4432 if (old_inode)
4433 nfs4_inode_make_writeable(old_inode);
4434 if (new_inode)
4435 nfs4_inode_return_delegation(new_inode);
4436 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4437 res->server = NFS_SB(old_dentry->d_sb);
4438 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0);
4439 }
4440
4441 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4442 {
4443 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4444 &data->args.seq_args,
4445 &data->res.seq_res,
4446 task);
4447 }
4448
4449 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4450 struct inode *new_dir)
4451 {
4452 struct nfs_renamedata *data = task->tk_calldata;
4453 struct nfs_renameres *res = &data->res;
4454
4455 if (!nfs4_sequence_done(task, &res->seq_res))
4456 return 0;
4457 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4458 return 0;
4459
4460 if (task->tk_status == 0) {
4461 if (new_dir != old_dir) {
4462 /* Note: If we moved a directory, nlink will change */
4463 update_changeattr(old_dir, &res->old_cinfo,
4464 res->old_fattr->time_start,
4465 NFS_INO_INVALID_OTHER);
4466 update_changeattr(new_dir, &res->new_cinfo,
4467 res->new_fattr->time_start,
4468 NFS_INO_INVALID_OTHER);
4469 } else
4470 update_changeattr(old_dir, &res->old_cinfo,
4471 res->old_fattr->time_start,
4472 0);
4473 }
4474 return 1;
4475 }
4476
4477 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4478 {
4479 struct nfs_server *server = NFS_SERVER(inode);
4480 __u32 bitmask[NFS4_BITMASK_SZ];
4481 struct nfs4_link_arg arg = {
4482 .fh = NFS_FH(inode),
4483 .dir_fh = NFS_FH(dir),
4484 .name = name,
4485 .bitmask = bitmask,
4486 };
4487 struct nfs4_link_res res = {
4488 .server = server,
4489 .label = NULL,
4490 };
4491 struct rpc_message msg = {
4492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4493 .rpc_argp = &arg,
4494 .rpc_resp = &res,
4495 };
4496 int status = -ENOMEM;
4497
4498 res.fattr = nfs_alloc_fattr();
4499 if (res.fattr == NULL)
4500 goto out;
4501
4502 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4503 if (IS_ERR(res.label)) {
4504 status = PTR_ERR(res.label);
4505 goto out;
4506 }
4507
4508 nfs4_inode_make_writeable(inode);
4509 nfs4_bitmap_copy_adjust_setattr(bitmask, nfs4_bitmask(server, res.label), inode);
4510
4511 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4512 if (!status) {
4513 update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0);
4514 status = nfs_post_op_update_inode(inode, res.fattr);
4515 if (!status)
4516 nfs_setsecurity(inode, res.fattr, res.label);
4517 }
4518
4519
4520 nfs4_label_free(res.label);
4521
4522 out:
4523 nfs_free_fattr(res.fattr);
4524 return status;
4525 }
4526
4527 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4528 {
4529 struct nfs4_exception exception = { };
4530 int err;
4531 do {
4532 err = nfs4_handle_exception(NFS_SERVER(inode),
4533 _nfs4_proc_link(inode, dir, name),
4534 &exception);
4535 } while (exception.retry);
4536 return err;
4537 }
4538
4539 struct nfs4_createdata {
4540 struct rpc_message msg;
4541 struct nfs4_create_arg arg;
4542 struct nfs4_create_res res;
4543 struct nfs_fh fh;
4544 struct nfs_fattr fattr;
4545 struct nfs4_label *label;
4546 };
4547
4548 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4549 const struct qstr *name, struct iattr *sattr, u32 ftype)
4550 {
4551 struct nfs4_createdata *data;
4552
4553 data = kzalloc(sizeof(*data), GFP_KERNEL);
4554 if (data != NULL) {
4555 struct nfs_server *server = NFS_SERVER(dir);
4556
4557 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4558 if (IS_ERR(data->label))
4559 goto out_free;
4560
4561 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4562 data->msg.rpc_argp = &data->arg;
4563 data->msg.rpc_resp = &data->res;
4564 data->arg.dir_fh = NFS_FH(dir);
4565 data->arg.server = server;
4566 data->arg.name = name;
4567 data->arg.attrs = sattr;
4568 data->arg.ftype = ftype;
4569 data->arg.bitmask = nfs4_bitmask(server, data->label);
4570 data->arg.umask = current_umask();
4571 data->res.server = server;
4572 data->res.fh = &data->fh;
4573 data->res.fattr = &data->fattr;
4574 data->res.label = data->label;
4575 nfs_fattr_init(data->res.fattr);
4576 }
4577 return data;
4578 out_free:
4579 kfree(data);
4580 return NULL;
4581 }
4582
4583 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4584 {
4585 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4586 &data->arg.seq_args, &data->res.seq_res, 1);
4587 if (status == 0) {
4588 spin_lock(&dir->i_lock);
4589 update_changeattr_locked(dir, &data->res.dir_cinfo,
4590 data->res.fattr->time_start, 0);
4591 /* Creating a directory bumps nlink in the parent */
4592 if (data->arg.ftype == NF4DIR)
4593 nfs4_inc_nlink_locked(dir);
4594 spin_unlock(&dir->i_lock);
4595 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4596 }
4597 return status;
4598 }
4599
4600 static void nfs4_free_createdata(struct nfs4_createdata *data)
4601 {
4602 nfs4_label_free(data->label);
4603 kfree(data);
4604 }
4605
4606 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4607 struct page *page, unsigned int len, struct iattr *sattr,
4608 struct nfs4_label *label)
4609 {
4610 struct nfs4_createdata *data;
4611 int status = -ENAMETOOLONG;
4612
4613 if (len > NFS4_MAXPATHLEN)
4614 goto out;
4615
4616 status = -ENOMEM;
4617 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4618 if (data == NULL)
4619 goto out;
4620
4621 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4622 data->arg.u.symlink.pages = &page;
4623 data->arg.u.symlink.len = len;
4624 data->arg.label = label;
4625
4626 status = nfs4_do_create(dir, dentry, data);
4627
4628 nfs4_free_createdata(data);
4629 out:
4630 return status;
4631 }
4632
4633 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4634 struct page *page, unsigned int len, struct iattr *sattr)
4635 {
4636 struct nfs4_exception exception = { };
4637 struct nfs4_label l, *label = NULL;
4638 int err;
4639
4640 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4641
4642 do {
4643 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4644 trace_nfs4_symlink(dir, &dentry->d_name, err);
4645 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4646 &exception);
4647 } while (exception.retry);
4648
4649 nfs4_label_release_security(label);
4650 return err;
4651 }
4652
4653 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4654 struct iattr *sattr, struct nfs4_label *label)
4655 {
4656 struct nfs4_createdata *data;
4657 int status = -ENOMEM;
4658
4659 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4660 if (data == NULL)
4661 goto out;
4662
4663 data->arg.label = label;
4664 status = nfs4_do_create(dir, dentry, data);
4665
4666 nfs4_free_createdata(data);
4667 out:
4668 return status;
4669 }
4670
4671 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4672 struct iattr *sattr)
4673 {
4674 struct nfs_server *server = NFS_SERVER(dir);
4675 struct nfs4_exception exception = { };
4676 struct nfs4_label l, *label = NULL;
4677 int err;
4678
4679 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4680
4681 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4682 sattr->ia_mode &= ~current_umask();
4683 do {
4684 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4685 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4686 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4687 &exception);
4688 } while (exception.retry);
4689 nfs4_label_release_security(label);
4690
4691 return err;
4692 }
4693
4694 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4695 u64 cookie, struct page **pages, unsigned int count, bool plus)
4696 {
4697 struct inode *dir = d_inode(dentry);
4698 struct nfs4_readdir_arg args = {
4699 .fh = NFS_FH(dir),
4700 .pages = pages,
4701 .pgbase = 0,
4702 .count = count,
4703 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4704 .plus = plus,
4705 };
4706 struct nfs4_readdir_res res;
4707 struct rpc_message msg = {
4708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4709 .rpc_argp = &args,
4710 .rpc_resp = &res,
4711 .rpc_cred = cred,
4712 };
4713 int status;
4714
4715 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4716 dentry,
4717 (unsigned long long)cookie);
4718 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4719 res.pgbase = args.pgbase;
4720 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4721 if (status >= 0) {
4722 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4723 status += args.pgbase;
4724 }
4725
4726 nfs_invalidate_atime(dir);
4727
4728 dprintk("%s: returns %d\n", __func__, status);
4729 return status;
4730 }
4731
4732 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4733 u64 cookie, struct page **pages, unsigned int count, bool plus)
4734 {
4735 struct nfs4_exception exception = { };
4736 int err;
4737 do {
4738 err = _nfs4_proc_readdir(dentry, cred, cookie,
4739 pages, count, plus);
4740 trace_nfs4_readdir(d_inode(dentry), err);
4741 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4742 &exception);
4743 } while (exception.retry);
4744 return err;
4745 }
4746
4747 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4748 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4749 {
4750 struct nfs4_createdata *data;
4751 int mode = sattr->ia_mode;
4752 int status = -ENOMEM;
4753
4754 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4755 if (data == NULL)
4756 goto out;
4757
4758 if (S_ISFIFO(mode))
4759 data->arg.ftype = NF4FIFO;
4760 else if (S_ISBLK(mode)) {
4761 data->arg.ftype = NF4BLK;
4762 data->arg.u.device.specdata1 = MAJOR(rdev);
4763 data->arg.u.device.specdata2 = MINOR(rdev);
4764 }
4765 else if (S_ISCHR(mode)) {
4766 data->arg.ftype = NF4CHR;
4767 data->arg.u.device.specdata1 = MAJOR(rdev);
4768 data->arg.u.device.specdata2 = MINOR(rdev);
4769 } else if (!S_ISSOCK(mode)) {
4770 status = -EINVAL;
4771 goto out_free;
4772 }
4773
4774 data->arg.label = label;
4775 status = nfs4_do_create(dir, dentry, data);
4776 out_free:
4777 nfs4_free_createdata(data);
4778 out:
4779 return status;
4780 }
4781
4782 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4783 struct iattr *sattr, dev_t rdev)
4784 {
4785 struct nfs_server *server = NFS_SERVER(dir);
4786 struct nfs4_exception exception = { };
4787 struct nfs4_label l, *label = NULL;
4788 int err;
4789
4790 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4791
4792 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4793 sattr->ia_mode &= ~current_umask();
4794 do {
4795 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4796 trace_nfs4_mknod(dir, &dentry->d_name, err);
4797 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4798 &exception);
4799 } while (exception.retry);
4800
4801 nfs4_label_release_security(label);
4802
4803 return err;
4804 }
4805
4806 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4807 struct nfs_fsstat *fsstat)
4808 {
4809 struct nfs4_statfs_arg args = {
4810 .fh = fhandle,
4811 .bitmask = server->attr_bitmask,
4812 };
4813 struct nfs4_statfs_res res = {
4814 .fsstat = fsstat,
4815 };
4816 struct rpc_message msg = {
4817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4818 .rpc_argp = &args,
4819 .rpc_resp = &res,
4820 };
4821
4822 nfs_fattr_init(fsstat->fattr);
4823 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4824 }
4825
4826 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4827 {
4828 struct nfs4_exception exception = { };
4829 int err;
4830 do {
4831 err = nfs4_handle_exception(server,
4832 _nfs4_proc_statfs(server, fhandle, fsstat),
4833 &exception);
4834 } while (exception.retry);
4835 return err;
4836 }
4837
4838 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4839 struct nfs_fsinfo *fsinfo)
4840 {
4841 struct nfs4_fsinfo_arg args = {
4842 .fh = fhandle,
4843 .bitmask = server->attr_bitmask,
4844 };
4845 struct nfs4_fsinfo_res res = {
4846 .fsinfo = fsinfo,
4847 };
4848 struct rpc_message msg = {
4849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4850 .rpc_argp = &args,
4851 .rpc_resp = &res,
4852 };
4853
4854 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4855 }
4856
4857 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4858 {
4859 struct nfs4_exception exception = { };
4860 unsigned long now = jiffies;
4861 int err;
4862
4863 do {
4864 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4865 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4866 if (err == 0) {
4867 nfs4_set_lease_period(server->nfs_client,
4868 fsinfo->lease_time * HZ,
4869 now);
4870 break;
4871 }
4872 err = nfs4_handle_exception(server, err, &exception);
4873 } while (exception.retry);
4874 return err;
4875 }
4876
4877 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4878 {
4879 int error;
4880
4881 nfs_fattr_init(fsinfo->fattr);
4882 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4883 if (error == 0) {
4884 /* block layout checks this! */
4885 server->pnfs_blksize = fsinfo->blksize;
4886 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4887 }
4888
4889 return error;
4890 }
4891
4892 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4893 struct nfs_pathconf *pathconf)
4894 {
4895 struct nfs4_pathconf_arg args = {
4896 .fh = fhandle,
4897 .bitmask = server->attr_bitmask,
4898 };
4899 struct nfs4_pathconf_res res = {
4900 .pathconf = pathconf,
4901 };
4902 struct rpc_message msg = {
4903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4904 .rpc_argp = &args,
4905 .rpc_resp = &res,
4906 };
4907
4908 /* None of the pathconf attributes are mandatory to implement */
4909 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4910 memset(pathconf, 0, sizeof(*pathconf));
4911 return 0;
4912 }
4913
4914 nfs_fattr_init(pathconf->fattr);
4915 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4916 }
4917
4918 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4919 struct nfs_pathconf *pathconf)
4920 {
4921 struct nfs4_exception exception = { };
4922 int err;
4923
4924 do {
4925 err = nfs4_handle_exception(server,
4926 _nfs4_proc_pathconf(server, fhandle, pathconf),
4927 &exception);
4928 } while (exception.retry);
4929 return err;
4930 }
4931
4932 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4933 const struct nfs_open_context *ctx,
4934 const struct nfs_lock_context *l_ctx,
4935 fmode_t fmode)
4936 {
4937 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4938 }
4939 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4940
4941 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4942 const struct nfs_open_context *ctx,
4943 const struct nfs_lock_context *l_ctx,
4944 fmode_t fmode)
4945 {
4946 nfs4_stateid current_stateid;
4947
4948 /* If the current stateid represents a lost lock, then exit */
4949 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4950 return true;
4951 return nfs4_stateid_match(stateid, &current_stateid);
4952 }
4953
4954 static bool nfs4_error_stateid_expired(int err)
4955 {
4956 switch (err) {
4957 case -NFS4ERR_DELEG_REVOKED:
4958 case -NFS4ERR_ADMIN_REVOKED:
4959 case -NFS4ERR_BAD_STATEID:
4960 case -NFS4ERR_STALE_STATEID:
4961 case -NFS4ERR_OLD_STATEID:
4962 case -NFS4ERR_OPENMODE:
4963 case -NFS4ERR_EXPIRED:
4964 return true;
4965 }
4966 return false;
4967 }
4968
4969 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4970 {
4971 struct nfs_server *server = NFS_SERVER(hdr->inode);
4972
4973 trace_nfs4_read(hdr, task->tk_status);
4974 if (task->tk_status < 0) {
4975 struct nfs4_exception exception = {
4976 .inode = hdr->inode,
4977 .state = hdr->args.context->state,
4978 .stateid = &hdr->args.stateid,
4979 };
4980 task->tk_status = nfs4_async_handle_exception(task,
4981 server, task->tk_status, &exception);
4982 if (exception.retry) {
4983 rpc_restart_call_prepare(task);
4984 return -EAGAIN;
4985 }
4986 }
4987
4988 if (task->tk_status > 0)
4989 renew_lease(server, hdr->timestamp);
4990 return 0;
4991 }
4992
4993 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4994 struct nfs_pgio_args *args)
4995 {
4996
4997 if (!nfs4_error_stateid_expired(task->tk_status) ||
4998 nfs4_stateid_is_current(&args->stateid,
4999 args->context,
5000 args->lock_context,
5001 FMODE_READ))
5002 return false;
5003 rpc_restart_call_prepare(task);
5004 return true;
5005 }
5006
5007 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5008 {
5009
5010 dprintk("--> %s\n", __func__);
5011
5012 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5013 return -EAGAIN;
5014 if (nfs4_read_stateid_changed(task, &hdr->args))
5015 return -EAGAIN;
5016 if (task->tk_status > 0)
5017 nfs_invalidate_atime(hdr->inode);
5018 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5019 nfs4_read_done_cb(task, hdr);
5020 }
5021
5022 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
5023 struct rpc_message *msg)
5024 {
5025 hdr->timestamp = jiffies;
5026 if (!hdr->pgio_done_cb)
5027 hdr->pgio_done_cb = nfs4_read_done_cb;
5028 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
5029 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0);
5030 }
5031
5032 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
5033 struct nfs_pgio_header *hdr)
5034 {
5035 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
5036 &hdr->args.seq_args,
5037 &hdr->res.seq_res,
5038 task))
5039 return 0;
5040 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
5041 hdr->args.lock_context,
5042 hdr->rw_mode) == -EIO)
5043 return -EIO;
5044 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
5045 return -EIO;
5046 return 0;
5047 }
5048
5049 static int nfs4_write_done_cb(struct rpc_task *task,
5050 struct nfs_pgio_header *hdr)
5051 {
5052 struct inode *inode = hdr->inode;
5053
5054 trace_nfs4_write(hdr, task->tk_status);
5055 if (task->tk_status < 0) {
5056 struct nfs4_exception exception = {
5057 .inode = hdr->inode,
5058 .state = hdr->args.context->state,
5059 .stateid = &hdr->args.stateid,
5060 };
5061 task->tk_status = nfs4_async_handle_exception(task,
5062 NFS_SERVER(inode), task->tk_status,
5063 &exception);
5064 if (exception.retry) {
5065 rpc_restart_call_prepare(task);
5066 return -EAGAIN;
5067 }
5068 }
5069 if (task->tk_status >= 0) {
5070 renew_lease(NFS_SERVER(inode), hdr->timestamp);
5071 nfs_writeback_update_inode(hdr);
5072 }
5073 return 0;
5074 }
5075
5076 static bool nfs4_write_stateid_changed(struct rpc_task *task,
5077 struct nfs_pgio_args *args)
5078 {
5079
5080 if (!nfs4_error_stateid_expired(task->tk_status) ||
5081 nfs4_stateid_is_current(&args->stateid,
5082 args->context,
5083 args->lock_context,
5084 FMODE_WRITE))
5085 return false;
5086 rpc_restart_call_prepare(task);
5087 return true;
5088 }
5089
5090 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
5091 {
5092 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
5093 return -EAGAIN;
5094 if (nfs4_write_stateid_changed(task, &hdr->args))
5095 return -EAGAIN;
5096 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
5097 nfs4_write_done_cb(task, hdr);
5098 }
5099
5100 static
5101 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
5102 {
5103 /* Don't request attributes for pNFS or O_DIRECT writes */
5104 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5105 return false;
5106 /* Otherwise, request attributes if and only if we don't hold
5107 * a delegation
5108 */
5109 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
5110 }
5111
5112 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
5113 struct rpc_message *msg,
5114 struct rpc_clnt **clnt)
5115 {
5116 struct nfs_server *server = NFS_SERVER(hdr->inode);
5117
5118 if (!nfs4_write_need_cache_consistency_data(hdr)) {
5119 hdr->args.bitmask = NULL;
5120 hdr->res.fattr = NULL;
5121 } else
5122 hdr->args.bitmask = server->cache_consistency_bitmask;
5123
5124 if (!hdr->pgio_done_cb)
5125 hdr->pgio_done_cb = nfs4_write_done_cb;
5126 hdr->res.server = server;
5127 hdr->timestamp = jiffies;
5128
5129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
5130 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1, 0);
5131 nfs4_state_protect_write(server->nfs_client, clnt, msg, hdr);
5132 }
5133
5134 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
5135 {
5136 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
5137 &data->args.seq_args,
5138 &data->res.seq_res,
5139 task);
5140 }
5141
5142 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
5143 {
5144 struct inode *inode = data->inode;
5145
5146 trace_nfs4_commit(data, task->tk_status);
5147 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
5148 NULL, NULL) == -EAGAIN) {
5149 rpc_restart_call_prepare(task);
5150 return -EAGAIN;
5151 }
5152 return 0;
5153 }
5154
5155 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5156 {
5157 if (!nfs4_sequence_done(task, &data->res.seq_res))
5158 return -EAGAIN;
5159 return data->commit_done_cb(task, data);
5160 }
5161
5162 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
5163 struct rpc_clnt **clnt)
5164 {
5165 struct nfs_server *server = NFS_SERVER(data->inode);
5166
5167 if (data->commit_done_cb == NULL)
5168 data->commit_done_cb = nfs4_commit_done_cb;
5169 data->res.server = server;
5170 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
5171 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
5172 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_COMMIT, clnt, msg);
5173 }
5174
5175 static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args,
5176 struct nfs_commitres *res)
5177 {
5178 struct inode *dst_inode = file_inode(dst);
5179 struct nfs_server *server = NFS_SERVER(dst_inode);
5180 struct rpc_message msg = {
5181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
5182 .rpc_argp = args,
5183 .rpc_resp = res,
5184 };
5185
5186 args->fh = NFS_FH(dst_inode);
5187 return nfs4_call_sync(server->client, server, &msg,
5188 &args->seq_args, &res->seq_res, 1);
5189 }
5190
5191 int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res)
5192 {
5193 struct nfs_commitargs args = {
5194 .offset = offset,
5195 .count = count,
5196 };
5197 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst));
5198 struct nfs4_exception exception = { };
5199 int status;
5200
5201 do {
5202 status = _nfs4_proc_commit(dst, &args, res);
5203 status = nfs4_handle_exception(dst_server, status, &exception);
5204 } while (exception.retry);
5205
5206 return status;
5207 }
5208
5209 struct nfs4_renewdata {
5210 struct nfs_client *client;
5211 unsigned long timestamp;
5212 };
5213
5214 /*
5215 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
5216 * standalone procedure for queueing an asynchronous RENEW.
5217 */
5218 static void nfs4_renew_release(void *calldata)
5219 {
5220 struct nfs4_renewdata *data = calldata;
5221 struct nfs_client *clp = data->client;
5222
5223 if (refcount_read(&clp->cl_count) > 1)
5224 nfs4_schedule_state_renewal(clp);
5225 nfs_put_client(clp);
5226 kfree(data);
5227 }
5228
5229 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
5230 {
5231 struct nfs4_renewdata *data = calldata;
5232 struct nfs_client *clp = data->client;
5233 unsigned long timestamp = data->timestamp;
5234
5235 trace_nfs4_renew_async(clp, task->tk_status);
5236 switch (task->tk_status) {
5237 case 0:
5238 break;
5239 case -NFS4ERR_LEASE_MOVED:
5240 nfs4_schedule_lease_moved_recovery(clp);
5241 break;
5242 default:
5243 /* Unless we're shutting down, schedule state recovery! */
5244 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5245 return;
5246 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
5247 nfs4_schedule_lease_recovery(clp);
5248 return;
5249 }
5250 nfs4_schedule_path_down_recovery(clp);
5251 }
5252 do_renew_lease(clp, timestamp);
5253 }
5254
5255 static const struct rpc_call_ops nfs4_renew_ops = {
5256 .rpc_call_done = nfs4_renew_done,
5257 .rpc_release = nfs4_renew_release,
5258 };
5259
5260 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5261 {
5262 struct rpc_message msg = {
5263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5264 .rpc_argp = clp,
5265 .rpc_cred = cred,
5266 };
5267 struct nfs4_renewdata *data;
5268
5269 if (renew_flags == 0)
5270 return 0;
5271 if (!refcount_inc_not_zero(&clp->cl_count))
5272 return -EIO;
5273 data = kmalloc(sizeof(*data), GFP_NOFS);
5274 if (data == NULL) {
5275 nfs_put_client(clp);
5276 return -ENOMEM;
5277 }
5278 data->client = clp;
5279 data->timestamp = jiffies;
5280 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
5281 &nfs4_renew_ops, data);
5282 }
5283
5284 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
5285 {
5286 struct rpc_message msg = {
5287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5288 .rpc_argp = clp,
5289 .rpc_cred = cred,
5290 };
5291 unsigned long now = jiffies;
5292 int status;
5293
5294 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5295 if (status < 0)
5296 return status;
5297 do_renew_lease(clp, now);
5298 return 0;
5299 }
5300
5301 static inline int nfs4_server_supports_acls(struct nfs_server *server)
5302 {
5303 return server->caps & NFS_CAP_ACLS;
5304 }
5305
5306 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5307 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
5308 * the stack.
5309 */
5310 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
5311
5312 static int buf_to_pages_noslab(const void *buf, size_t buflen,
5313 struct page **pages)
5314 {
5315 struct page *newpage, **spages;
5316 int rc = 0;
5317 size_t len;
5318 spages = pages;
5319
5320 do {
5321 len = min_t(size_t, PAGE_SIZE, buflen);
5322 newpage = alloc_page(GFP_KERNEL);
5323
5324 if (newpage == NULL)
5325 goto unwind;
5326 memcpy(page_address(newpage), buf, len);
5327 buf += len;
5328 buflen -= len;
5329 *pages++ = newpage;
5330 rc++;
5331 } while (buflen != 0);
5332
5333 return rc;
5334
5335 unwind:
5336 for(; rc > 0; rc--)
5337 __free_page(spages[rc-1]);
5338 return -ENOMEM;
5339 }
5340
5341 struct nfs4_cached_acl {
5342 int cached;
5343 size_t len;
5344 char data[0];
5345 };
5346
5347 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5348 {
5349 struct nfs_inode *nfsi = NFS_I(inode);
5350
5351 spin_lock(&inode->i_lock);
5352 kfree(nfsi->nfs4_acl);
5353 nfsi->nfs4_acl = acl;
5354 spin_unlock(&inode->i_lock);
5355 }
5356
5357 static void nfs4_zap_acl_attr(struct inode *inode)
5358 {
5359 nfs4_set_cached_acl(inode, NULL);
5360 }
5361
5362 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5363 {
5364 struct nfs_inode *nfsi = NFS_I(inode);
5365 struct nfs4_cached_acl *acl;
5366 int ret = -ENOENT;
5367
5368 spin_lock(&inode->i_lock);
5369 acl = nfsi->nfs4_acl;
5370 if (acl == NULL)
5371 goto out;
5372 if (buf == NULL) /* user is just asking for length */
5373 goto out_len;
5374 if (acl->cached == 0)
5375 goto out;
5376 ret = -ERANGE; /* see getxattr(2) man page */
5377 if (acl->len > buflen)
5378 goto out;
5379 memcpy(buf, acl->data, acl->len);
5380 out_len:
5381 ret = acl->len;
5382 out:
5383 spin_unlock(&inode->i_lock);
5384 return ret;
5385 }
5386
5387 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5388 {
5389 struct nfs4_cached_acl *acl;
5390 size_t buflen = sizeof(*acl) + acl_len;
5391
5392 if (buflen <= PAGE_SIZE) {
5393 acl = kmalloc(buflen, GFP_KERNEL);
5394 if (acl == NULL)
5395 goto out;
5396 acl->cached = 1;
5397 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5398 } else {
5399 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5400 if (acl == NULL)
5401 goto out;
5402 acl->cached = 0;
5403 }
5404 acl->len = acl_len;
5405 out:
5406 nfs4_set_cached_acl(inode, acl);
5407 }
5408
5409 /*
5410 * The getxattr API returns the required buffer length when called with a
5411 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5412 * the required buf. On a NULL buf, we send a page of data to the server
5413 * guessing that the ACL request can be serviced by a page. If so, we cache
5414 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5415 * the cache. If not so, we throw away the page, and cache the required
5416 * length. The next getxattr call will then produce another round trip to
5417 * the server, this time with the input buf of the required size.
5418 */
5419 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5420 {
5421 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
5422 struct nfs_getaclargs args = {
5423 .fh = NFS_FH(inode),
5424 .acl_pages = pages,
5425 .acl_len = buflen,
5426 };
5427 struct nfs_getaclres res = {
5428 .acl_len = buflen,
5429 };
5430 struct rpc_message msg = {
5431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5432 .rpc_argp = &args,
5433 .rpc_resp = &res,
5434 };
5435 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
5436 int ret = -ENOMEM, i;
5437
5438 if (npages > ARRAY_SIZE(pages))
5439 return -ERANGE;
5440
5441 for (i = 0; i < npages; i++) {
5442 pages[i] = alloc_page(GFP_KERNEL);
5443 if (!pages[i])
5444 goto out_free;
5445 }
5446
5447 /* for decoding across pages */
5448 res.acl_scratch = alloc_page(GFP_KERNEL);
5449 if (!res.acl_scratch)
5450 goto out_free;
5451
5452 args.acl_len = npages * PAGE_SIZE;
5453
5454 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5455 __func__, buf, buflen, npages, args.acl_len);
5456 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5457 &msg, &args.seq_args, &res.seq_res, 0);
5458 if (ret)
5459 goto out_free;
5460
5461 /* Handle the case where the passed-in buffer is too short */
5462 if (res.acl_flags & NFS4_ACL_TRUNC) {
5463 /* Did the user only issue a request for the acl length? */
5464 if (buf == NULL)
5465 goto out_ok;
5466 ret = -ERANGE;
5467 goto out_free;
5468 }
5469 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5470 if (buf) {
5471 if (res.acl_len > buflen) {
5472 ret = -ERANGE;
5473 goto out_free;
5474 }
5475 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5476 }
5477 out_ok:
5478 ret = res.acl_len;
5479 out_free:
5480 for (i = 0; i < npages; i++)
5481 if (pages[i])
5482 __free_page(pages[i]);
5483 if (res.acl_scratch)
5484 __free_page(res.acl_scratch);
5485 return ret;
5486 }
5487
5488 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5489 {
5490 struct nfs4_exception exception = { };
5491 ssize_t ret;
5492 do {
5493 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5494 trace_nfs4_get_acl(inode, ret);
5495 if (ret >= 0)
5496 break;
5497 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5498 } while (exception.retry);
5499 return ret;
5500 }
5501
5502 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5503 {
5504 struct nfs_server *server = NFS_SERVER(inode);
5505 int ret;
5506
5507 if (!nfs4_server_supports_acls(server))
5508 return -EOPNOTSUPP;
5509 ret = nfs_revalidate_inode(server, inode);
5510 if (ret < 0)
5511 return ret;
5512 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5513 nfs_zap_acl_cache(inode);
5514 ret = nfs4_read_cached_acl(inode, buf, buflen);
5515 if (ret != -ENOENT)
5516 /* -ENOENT is returned if there is no ACL or if there is an ACL
5517 * but no cached acl data, just the acl length */
5518 return ret;
5519 return nfs4_get_acl_uncached(inode, buf, buflen);
5520 }
5521
5522 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5523 {
5524 struct nfs_server *server = NFS_SERVER(inode);
5525 struct page *pages[NFS4ACL_MAXPAGES];
5526 struct nfs_setaclargs arg = {
5527 .fh = NFS_FH(inode),
5528 .acl_pages = pages,
5529 .acl_len = buflen,
5530 };
5531 struct nfs_setaclres res;
5532 struct rpc_message msg = {
5533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5534 .rpc_argp = &arg,
5535 .rpc_resp = &res,
5536 };
5537 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5538 int ret, i;
5539
5540 if (!nfs4_server_supports_acls(server))
5541 return -EOPNOTSUPP;
5542 if (npages > ARRAY_SIZE(pages))
5543 return -ERANGE;
5544 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5545 if (i < 0)
5546 return i;
5547 nfs4_inode_make_writeable(inode);
5548 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5549
5550 /*
5551 * Free each page after tx, so the only ref left is
5552 * held by the network stack
5553 */
5554 for (; i > 0; i--)
5555 put_page(pages[i-1]);
5556
5557 /*
5558 * Acl update can result in inode attribute update.
5559 * so mark the attribute cache invalid.
5560 */
5561 spin_lock(&inode->i_lock);
5562 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_CHANGE
5563 | NFS_INO_INVALID_CTIME
5564 | NFS_INO_REVAL_FORCED;
5565 spin_unlock(&inode->i_lock);
5566 nfs_access_zap_cache(inode);
5567 nfs_zap_acl_cache(inode);
5568 return ret;
5569 }
5570
5571 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5572 {
5573 struct nfs4_exception exception = { };
5574 int err;
5575 do {
5576 err = __nfs4_proc_set_acl(inode, buf, buflen);
5577 trace_nfs4_set_acl(inode, err);
5578 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5579 &exception);
5580 } while (exception.retry);
5581 return err;
5582 }
5583
5584 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5585 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5586 size_t buflen)
5587 {
5588 struct nfs_server *server = NFS_SERVER(inode);
5589 struct nfs_fattr fattr;
5590 struct nfs4_label label = {0, 0, buflen, buf};
5591
5592 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5593 struct nfs4_getattr_arg arg = {
5594 .fh = NFS_FH(inode),
5595 .bitmask = bitmask,
5596 };
5597 struct nfs4_getattr_res res = {
5598 .fattr = &fattr,
5599 .label = &label,
5600 .server = server,
5601 };
5602 struct rpc_message msg = {
5603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5604 .rpc_argp = &arg,
5605 .rpc_resp = &res,
5606 };
5607 int ret;
5608
5609 nfs_fattr_init(&fattr);
5610
5611 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5612 if (ret)
5613 return ret;
5614 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5615 return -ENOENT;
5616 if (buflen < label.len)
5617 return -ERANGE;
5618 return 0;
5619 }
5620
5621 static int nfs4_get_security_label(struct inode *inode, void *buf,
5622 size_t buflen)
5623 {
5624 struct nfs4_exception exception = { };
5625 int err;
5626
5627 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5628 return -EOPNOTSUPP;
5629
5630 do {
5631 err = _nfs4_get_security_label(inode, buf, buflen);
5632 trace_nfs4_get_security_label(inode, err);
5633 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5634 &exception);
5635 } while (exception.retry);
5636 return err;
5637 }
5638
5639 static int _nfs4_do_set_security_label(struct inode *inode,
5640 struct nfs4_label *ilabel,
5641 struct nfs_fattr *fattr,
5642 struct nfs4_label *olabel)
5643 {
5644
5645 struct iattr sattr = {0};
5646 struct nfs_server *server = NFS_SERVER(inode);
5647 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5648 struct nfs_setattrargs arg = {
5649 .fh = NFS_FH(inode),
5650 .iap = &sattr,
5651 .server = server,
5652 .bitmask = bitmask,
5653 .label = ilabel,
5654 };
5655 struct nfs_setattrres res = {
5656 .fattr = fattr,
5657 .label = olabel,
5658 .server = server,
5659 };
5660 struct rpc_message msg = {
5661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5662 .rpc_argp = &arg,
5663 .rpc_resp = &res,
5664 };
5665 int status;
5666
5667 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5668
5669 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5670 if (status)
5671 dprintk("%s failed: %d\n", __func__, status);
5672
5673 return status;
5674 }
5675
5676 static int nfs4_do_set_security_label(struct inode *inode,
5677 struct nfs4_label *ilabel,
5678 struct nfs_fattr *fattr,
5679 struct nfs4_label *olabel)
5680 {
5681 struct nfs4_exception exception = { };
5682 int err;
5683
5684 do {
5685 err = _nfs4_do_set_security_label(inode, ilabel,
5686 fattr, olabel);
5687 trace_nfs4_set_security_label(inode, err);
5688 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5689 &exception);
5690 } while (exception.retry);
5691 return err;
5692 }
5693
5694 static int
5695 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5696 {
5697 struct nfs4_label ilabel, *olabel = NULL;
5698 struct nfs_fattr fattr;
5699 struct rpc_cred *cred;
5700 int status;
5701
5702 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5703 return -EOPNOTSUPP;
5704
5705 nfs_fattr_init(&fattr);
5706
5707 ilabel.pi = 0;
5708 ilabel.lfs = 0;
5709 ilabel.label = (char *)buf;
5710 ilabel.len = buflen;
5711
5712 cred = rpc_lookup_cred();
5713 if (IS_ERR(cred))
5714 return PTR_ERR(cred);
5715
5716 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5717 if (IS_ERR(olabel)) {
5718 status = -PTR_ERR(olabel);
5719 goto out;
5720 }
5721
5722 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5723 if (status == 0)
5724 nfs_setsecurity(inode, &fattr, olabel);
5725
5726 nfs4_label_free(olabel);
5727 out:
5728 put_rpccred(cred);
5729 return status;
5730 }
5731 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5732
5733
5734 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5735 nfs4_verifier *bootverf)
5736 {
5737 __be32 verf[2];
5738
5739 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5740 /* An impossible timestamp guarantees this value
5741 * will never match a generated boot time. */
5742 verf[0] = cpu_to_be32(U32_MAX);
5743 verf[1] = cpu_to_be32(U32_MAX);
5744 } else {
5745 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5746 u64 ns = ktime_to_ns(nn->boot_time);
5747
5748 verf[0] = cpu_to_be32(ns >> 32);
5749 verf[1] = cpu_to_be32(ns);
5750 }
5751 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5752 }
5753
5754 static int
5755 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5756 {
5757 size_t len;
5758 char *str;
5759
5760 if (clp->cl_owner_id != NULL)
5761 return 0;
5762
5763 rcu_read_lock();
5764 len = 14 +
5765 strlen(clp->cl_rpcclient->cl_nodename) +
5766 1 +
5767 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5768 1;
5769 rcu_read_unlock();
5770 if (nfs4_client_id_uniquifier[0] != '\0')
5771 len += strlen(nfs4_client_id_uniquifier) + 1;
5772 if (len > NFS4_OPAQUE_LIMIT + 1)
5773 return -EINVAL;
5774
5775 /*
5776 * Since this string is allocated at mount time, and held until the
5777 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5778 * about a memory-reclaim deadlock.
5779 */
5780 str = kmalloc(len, GFP_KERNEL);
5781 if (!str)
5782 return -ENOMEM;
5783
5784 rcu_read_lock();
5785 if (nfs4_client_id_uniquifier[0] != '\0')
5786 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s",
5787 clp->cl_rpcclient->cl_nodename,
5788 nfs4_client_id_uniquifier,
5789 rpc_peeraddr2str(clp->cl_rpcclient,
5790 RPC_DISPLAY_ADDR));
5791 else
5792 scnprintf(str, len, "Linux NFSv4.0 %s/%s",
5793 clp->cl_rpcclient->cl_nodename,
5794 rpc_peeraddr2str(clp->cl_rpcclient,
5795 RPC_DISPLAY_ADDR));
5796 rcu_read_unlock();
5797
5798 clp->cl_owner_id = str;
5799 return 0;
5800 }
5801
5802 static int
5803 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5804 {
5805 size_t len;
5806 char *str;
5807
5808 len = 10 + 10 + 1 + 10 + 1 +
5809 strlen(nfs4_client_id_uniquifier) + 1 +
5810 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5811
5812 if (len > NFS4_OPAQUE_LIMIT + 1)
5813 return -EINVAL;
5814
5815 /*
5816 * Since this string is allocated at mount time, and held until the
5817 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5818 * about a memory-reclaim deadlock.
5819 */
5820 str = kmalloc(len, GFP_KERNEL);
5821 if (!str)
5822 return -ENOMEM;
5823
5824 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5825 clp->rpc_ops->version, clp->cl_minorversion,
5826 nfs4_client_id_uniquifier,
5827 clp->cl_rpcclient->cl_nodename);
5828 clp->cl_owner_id = str;
5829 return 0;
5830 }
5831
5832 static int
5833 nfs4_init_uniform_client_string(struct nfs_client *clp)
5834 {
5835 size_t len;
5836 char *str;
5837
5838 if (clp->cl_owner_id != NULL)
5839 return 0;
5840
5841 if (nfs4_client_id_uniquifier[0] != '\0')
5842 return nfs4_init_uniquifier_client_string(clp);
5843
5844 len = 10 + 10 + 1 + 10 + 1 +
5845 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5846
5847 if (len > NFS4_OPAQUE_LIMIT + 1)
5848 return -EINVAL;
5849
5850 /*
5851 * Since this string is allocated at mount time, and held until the
5852 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5853 * about a memory-reclaim deadlock.
5854 */
5855 str = kmalloc(len, GFP_KERNEL);
5856 if (!str)
5857 return -ENOMEM;
5858
5859 scnprintf(str, len, "Linux NFSv%u.%u %s",
5860 clp->rpc_ops->version, clp->cl_minorversion,
5861 clp->cl_rpcclient->cl_nodename);
5862 clp->cl_owner_id = str;
5863 return 0;
5864 }
5865
5866 /*
5867 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5868 * services. Advertise one based on the address family of the
5869 * clientaddr.
5870 */
5871 static unsigned int
5872 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5873 {
5874 if (strchr(clp->cl_ipaddr, ':') != NULL)
5875 return scnprintf(buf, len, "tcp6");
5876 else
5877 return scnprintf(buf, len, "tcp");
5878 }
5879
5880 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5881 {
5882 struct nfs4_setclientid *sc = calldata;
5883
5884 if (task->tk_status == 0)
5885 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5886 }
5887
5888 static const struct rpc_call_ops nfs4_setclientid_ops = {
5889 .rpc_call_done = nfs4_setclientid_done,
5890 };
5891
5892 /**
5893 * nfs4_proc_setclientid - Negotiate client ID
5894 * @clp: state data structure
5895 * @program: RPC program for NFSv4 callback service
5896 * @port: IP port number for NFS4 callback service
5897 * @cred: RPC credential to use for this call
5898 * @res: where to place the result
5899 *
5900 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5901 */
5902 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5903 unsigned short port, struct rpc_cred *cred,
5904 struct nfs4_setclientid_res *res)
5905 {
5906 nfs4_verifier sc_verifier;
5907 struct nfs4_setclientid setclientid = {
5908 .sc_verifier = &sc_verifier,
5909 .sc_prog = program,
5910 .sc_clnt = clp,
5911 };
5912 struct rpc_message msg = {
5913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5914 .rpc_argp = &setclientid,
5915 .rpc_resp = res,
5916 .rpc_cred = cred,
5917 };
5918 struct rpc_task *task;
5919 struct rpc_task_setup task_setup_data = {
5920 .rpc_client = clp->cl_rpcclient,
5921 .rpc_message = &msg,
5922 .callback_ops = &nfs4_setclientid_ops,
5923 .callback_data = &setclientid,
5924 .flags = RPC_TASK_TIMEOUT,
5925 };
5926 int status;
5927
5928 /* nfs_client_id4 */
5929 nfs4_init_boot_verifier(clp, &sc_verifier);
5930
5931 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5932 status = nfs4_init_uniform_client_string(clp);
5933 else
5934 status = nfs4_init_nonuniform_client_string(clp);
5935
5936 if (status)
5937 goto out;
5938
5939 /* cb_client4 */
5940 setclientid.sc_netid_len =
5941 nfs4_init_callback_netid(clp,
5942 setclientid.sc_netid,
5943 sizeof(setclientid.sc_netid));
5944 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5945 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5946 clp->cl_ipaddr, port >> 8, port & 255);
5947
5948 dprintk("NFS call setclientid auth=%s, '%s'\n",
5949 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5950 clp->cl_owner_id);
5951 task = rpc_run_task(&task_setup_data);
5952 if (IS_ERR(task)) {
5953 status = PTR_ERR(task);
5954 goto out;
5955 }
5956 status = task->tk_status;
5957 if (setclientid.sc_cred) {
5958 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5959 put_rpccred(setclientid.sc_cred);
5960 }
5961 rpc_put_task(task);
5962 out:
5963 trace_nfs4_setclientid(clp, status);
5964 dprintk("NFS reply setclientid: %d\n", status);
5965 return status;
5966 }
5967
5968 /**
5969 * nfs4_proc_setclientid_confirm - Confirm client ID
5970 * @clp: state data structure
5971 * @res: result of a previous SETCLIENTID
5972 * @cred: RPC credential to use for this call
5973 *
5974 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5975 */
5976 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5977 struct nfs4_setclientid_res *arg,
5978 struct rpc_cred *cred)
5979 {
5980 struct rpc_message msg = {
5981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5982 .rpc_argp = arg,
5983 .rpc_cred = cred,
5984 };
5985 int status;
5986
5987 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5988 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5989 clp->cl_clientid);
5990 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5991 trace_nfs4_setclientid_confirm(clp, status);
5992 dprintk("NFS reply setclientid_confirm: %d\n", status);
5993 return status;
5994 }
5995
5996 struct nfs4_delegreturndata {
5997 struct nfs4_delegreturnargs args;
5998 struct nfs4_delegreturnres res;
5999 struct nfs_fh fh;
6000 nfs4_stateid stateid;
6001 unsigned long timestamp;
6002 struct {
6003 struct nfs4_layoutreturn_args arg;
6004 struct nfs4_layoutreturn_res res;
6005 struct nfs4_xdr_opaque_data ld_private;
6006 u32 roc_barrier;
6007 bool roc;
6008 } lr;
6009 struct nfs_fattr fattr;
6010 int rpc_status;
6011 struct inode *inode;
6012 };
6013
6014 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
6015 {
6016 struct nfs4_delegreturndata *data = calldata;
6017 struct nfs4_exception exception = {
6018 .inode = data->inode,
6019 .stateid = &data->stateid,
6020 };
6021
6022 if (!nfs4_sequence_done(task, &data->res.seq_res))
6023 return;
6024
6025 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
6026
6027 /* Handle Layoutreturn errors */
6028 if (data->args.lr_args && task->tk_status != 0) {
6029 switch(data->res.lr_ret) {
6030 default:
6031 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6032 break;
6033 case 0:
6034 data->args.lr_args = NULL;
6035 data->res.lr_res = NULL;
6036 break;
6037 case -NFS4ERR_OLD_STATEID:
6038 if (nfs4_layoutreturn_refresh_stateid(&data->args.lr_args->stateid,
6039 &data->args.lr_args->range,
6040 data->inode))
6041 goto lr_restart;
6042 /* Fallthrough */
6043 case -NFS4ERR_ADMIN_REVOKED:
6044 case -NFS4ERR_DELEG_REVOKED:
6045 case -NFS4ERR_EXPIRED:
6046 case -NFS4ERR_BAD_STATEID:
6047 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
6048 case -NFS4ERR_WRONG_CRED:
6049 data->args.lr_args = NULL;
6050 data->res.lr_res = NULL;
6051 goto lr_restart;
6052 }
6053 }
6054
6055 switch (task->tk_status) {
6056 case 0:
6057 renew_lease(data->res.server, data->timestamp);
6058 break;
6059 case -NFS4ERR_ADMIN_REVOKED:
6060 case -NFS4ERR_DELEG_REVOKED:
6061 case -NFS4ERR_EXPIRED:
6062 nfs4_free_revoked_stateid(data->res.server,
6063 data->args.stateid,
6064 task->tk_msg.rpc_cred);
6065 /* Fallthrough */
6066 case -NFS4ERR_BAD_STATEID:
6067 case -NFS4ERR_STALE_STATEID:
6068 task->tk_status = 0;
6069 break;
6070 case -NFS4ERR_OLD_STATEID:
6071 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
6072 goto out_restart;
6073 task->tk_status = 0;
6074 break;
6075 case -NFS4ERR_ACCESS:
6076 if (data->args.bitmask) {
6077 data->args.bitmask = NULL;
6078 data->res.fattr = NULL;
6079 goto out_restart;
6080 }
6081 /* Fallthrough */
6082 default:
6083 task->tk_status = nfs4_async_handle_exception(task,
6084 data->res.server, task->tk_status,
6085 &exception);
6086 if (exception.retry)
6087 goto out_restart;
6088 }
6089 data->rpc_status = task->tk_status;
6090 return;
6091 lr_restart:
6092 data->res.lr_ret = 0;
6093 out_restart:
6094 task->tk_status = 0;
6095 rpc_restart_call_prepare(task);
6096 }
6097
6098 static void nfs4_delegreturn_release(void *calldata)
6099 {
6100 struct nfs4_delegreturndata *data = calldata;
6101 struct inode *inode = data->inode;
6102
6103 if (inode) {
6104 if (data->lr.roc)
6105 pnfs_roc_release(&data->lr.arg, &data->lr.res,
6106 data->res.lr_ret);
6107 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
6108 nfs_iput_and_deactive(inode);
6109 }
6110 kfree(calldata);
6111 }
6112
6113 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
6114 {
6115 struct nfs4_delegreturndata *d_data;
6116 struct pnfs_layout_hdr *lo;
6117
6118 d_data = (struct nfs4_delegreturndata *)data;
6119
6120 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
6121 return;
6122
6123 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL;
6124 if (lo && !pnfs_layout_is_valid(lo)) {
6125 d_data->args.lr_args = NULL;
6126 d_data->res.lr_res = NULL;
6127 }
6128
6129 nfs4_setup_sequence(d_data->res.server->nfs_client,
6130 &d_data->args.seq_args,
6131 &d_data->res.seq_res,
6132 task);
6133 }
6134
6135 static const struct rpc_call_ops nfs4_delegreturn_ops = {
6136 .rpc_call_prepare = nfs4_delegreturn_prepare,
6137 .rpc_call_done = nfs4_delegreturn_done,
6138 .rpc_release = nfs4_delegreturn_release,
6139 };
6140
6141 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
6142 {
6143 struct nfs4_delegreturndata *data;
6144 struct nfs_server *server = NFS_SERVER(inode);
6145 struct rpc_task *task;
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
6148 .rpc_cred = cred,
6149 };
6150 struct rpc_task_setup task_setup_data = {
6151 .rpc_client = server->client,
6152 .rpc_message = &msg,
6153 .callback_ops = &nfs4_delegreturn_ops,
6154 .flags = RPC_TASK_ASYNC,
6155 };
6156 int status = 0;
6157
6158 data = kzalloc(sizeof(*data), GFP_NOFS);
6159 if (data == NULL)
6160 return -ENOMEM;
6161 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
6162
6163 nfs4_state_protect(server->nfs_client,
6164 NFS_SP4_MACH_CRED_CLEANUP,
6165 &task_setup_data.rpc_client, &msg);
6166
6167 data->args.fhandle = &data->fh;
6168 data->args.stateid = &data->stateid;
6169 data->args.bitmask = server->cache_consistency_bitmask;
6170 nfs_copy_fh(&data->fh, NFS_FH(inode));
6171 nfs4_stateid_copy(&data->stateid, stateid);
6172 data->res.fattr = &data->fattr;
6173 data->res.server = server;
6174 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
6175 data->lr.arg.ld_private = &data->lr.ld_private;
6176 nfs_fattr_init(data->res.fattr);
6177 data->timestamp = jiffies;
6178 data->rpc_status = 0;
6179 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
6180 data->inode = nfs_igrab_and_active(inode);
6181 if (data->inode) {
6182 if (data->lr.roc) {
6183 data->args.lr_args = &data->lr.arg;
6184 data->res.lr_res = &data->lr.res;
6185 }
6186 } else if (data->lr.roc) {
6187 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
6188 data->lr.roc = false;
6189 }
6190
6191 task_setup_data.callback_data = data;
6192 msg.rpc_argp = &data->args;
6193 msg.rpc_resp = &data->res;
6194 task = rpc_run_task(&task_setup_data);
6195 if (IS_ERR(task))
6196 return PTR_ERR(task);
6197 if (!issync)
6198 goto out;
6199 status = rpc_wait_for_completion_task(task);
6200 if (status != 0)
6201 goto out;
6202 status = data->rpc_status;
6203 out:
6204 rpc_put_task(task);
6205 return status;
6206 }
6207
6208 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
6209 {
6210 struct nfs_server *server = NFS_SERVER(inode);
6211 struct nfs4_exception exception = { };
6212 int err;
6213 do {
6214 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
6215 trace_nfs4_delegreturn(inode, stateid, err);
6216 switch (err) {
6217 case -NFS4ERR_STALE_STATEID:
6218 case -NFS4ERR_EXPIRED:
6219 case 0:
6220 return 0;
6221 }
6222 err = nfs4_handle_exception(server, err, &exception);
6223 } while (exception.retry);
6224 return err;
6225 }
6226
6227 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6228 {
6229 struct inode *inode = state->inode;
6230 struct nfs_server *server = NFS_SERVER(inode);
6231 struct nfs_client *clp = server->nfs_client;
6232 struct nfs_lockt_args arg = {
6233 .fh = NFS_FH(inode),
6234 .fl = request,
6235 };
6236 struct nfs_lockt_res res = {
6237 .denied = request,
6238 };
6239 struct rpc_message msg = {
6240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
6241 .rpc_argp = &arg,
6242 .rpc_resp = &res,
6243 .rpc_cred = state->owner->so_cred,
6244 };
6245 struct nfs4_lock_state *lsp;
6246 int status;
6247
6248 arg.lock_owner.clientid = clp->cl_clientid;
6249 status = nfs4_set_lock_state(state, request);
6250 if (status != 0)
6251 goto out;
6252 lsp = request->fl_u.nfs4_fl.owner;
6253 arg.lock_owner.id = lsp->ls_seqid.owner_id;
6254 arg.lock_owner.s_dev = server->s_dev;
6255 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
6256 switch (status) {
6257 case 0:
6258 request->fl_type = F_UNLCK;
6259 break;
6260 case -NFS4ERR_DENIED:
6261 status = 0;
6262 }
6263 request->fl_ops->fl_release_private(request);
6264 request->fl_ops = NULL;
6265 out:
6266 return status;
6267 }
6268
6269 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6270 {
6271 struct nfs4_exception exception = { };
6272 int err;
6273
6274 do {
6275 err = _nfs4_proc_getlk(state, cmd, request);
6276 trace_nfs4_get_lock(request, state, cmd, err);
6277 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
6278 &exception);
6279 } while (exception.retry);
6280 return err;
6281 }
6282
6283 struct nfs4_unlockdata {
6284 struct nfs_locku_args arg;
6285 struct nfs_locku_res res;
6286 struct nfs4_lock_state *lsp;
6287 struct nfs_open_context *ctx;
6288 struct nfs_lock_context *l_ctx;
6289 struct file_lock fl;
6290 struct nfs_server *server;
6291 unsigned long timestamp;
6292 };
6293
6294 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6295 struct nfs_open_context *ctx,
6296 struct nfs4_lock_state *lsp,
6297 struct nfs_seqid *seqid)
6298 {
6299 struct nfs4_unlockdata *p;
6300 struct inode *inode = lsp->ls_state->inode;
6301
6302 p = kzalloc(sizeof(*p), GFP_NOFS);
6303 if (p == NULL)
6304 return NULL;
6305 p->arg.fh = NFS_FH(inode);
6306 p->arg.fl = &p->fl;
6307 p->arg.seqid = seqid;
6308 p->res.seqid = seqid;
6309 p->lsp = lsp;
6310 refcount_inc(&lsp->ls_count);
6311 /* Ensure we don't close file until we're done freeing locks! */
6312 p->ctx = get_nfs_open_context(ctx);
6313 p->l_ctx = nfs_get_lock_context(ctx);
6314 memcpy(&p->fl, fl, sizeof(p->fl));
6315 p->server = NFS_SERVER(inode);
6316 return p;
6317 }
6318
6319 static void nfs4_locku_release_calldata(void *data)
6320 {
6321 struct nfs4_unlockdata *calldata = data;
6322 nfs_free_seqid(calldata->arg.seqid);
6323 nfs4_put_lock_state(calldata->lsp);
6324 nfs_put_lock_context(calldata->l_ctx);
6325 put_nfs_open_context(calldata->ctx);
6326 kfree(calldata);
6327 }
6328
6329 static void nfs4_locku_done(struct rpc_task *task, void *data)
6330 {
6331 struct nfs4_unlockdata *calldata = data;
6332 struct nfs4_exception exception = {
6333 .inode = calldata->lsp->ls_state->inode,
6334 .stateid = &calldata->arg.stateid,
6335 };
6336
6337 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6338 return;
6339 switch (task->tk_status) {
6340 case 0:
6341 renew_lease(calldata->server, calldata->timestamp);
6342 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
6343 if (nfs4_update_lock_stateid(calldata->lsp,
6344 &calldata->res.stateid))
6345 break;
6346 /* Fall through */
6347 case -NFS4ERR_ADMIN_REVOKED:
6348 case -NFS4ERR_EXPIRED:
6349 nfs4_free_revoked_stateid(calldata->server,
6350 &calldata->arg.stateid,
6351 task->tk_msg.rpc_cred);
6352 /* Fall through */
6353 case -NFS4ERR_BAD_STATEID:
6354 case -NFS4ERR_OLD_STATEID:
6355 case -NFS4ERR_STALE_STATEID:
6356 if (!nfs4_stateid_match(&calldata->arg.stateid,
6357 &calldata->lsp->ls_stateid))
6358 rpc_restart_call_prepare(task);
6359 break;
6360 default:
6361 task->tk_status = nfs4_async_handle_exception(task,
6362 calldata->server, task->tk_status,
6363 &exception);
6364 if (exception.retry)
6365 rpc_restart_call_prepare(task);
6366 }
6367 nfs_release_seqid(calldata->arg.seqid);
6368 }
6369
6370 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
6371 {
6372 struct nfs4_unlockdata *calldata = data;
6373
6374 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6375 nfs_async_iocounter_wait(task, calldata->l_ctx))
6376 return;
6377
6378 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
6379 goto out_wait;
6380 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
6381 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
6382 /* Note: exit _without_ running nfs4_locku_done */
6383 goto out_no_action;
6384 }
6385 calldata->timestamp = jiffies;
6386 if (nfs4_setup_sequence(calldata->server->nfs_client,
6387 &calldata->arg.seq_args,
6388 &calldata->res.seq_res,
6389 task) != 0)
6390 nfs_release_seqid(calldata->arg.seqid);
6391 return;
6392 out_no_action:
6393 task->tk_action = NULL;
6394 out_wait:
6395 nfs4_sequence_done(task, &calldata->res.seq_res);
6396 }
6397
6398 static const struct rpc_call_ops nfs4_locku_ops = {
6399 .rpc_call_prepare = nfs4_locku_prepare,
6400 .rpc_call_done = nfs4_locku_done,
6401 .rpc_release = nfs4_locku_release_calldata,
6402 };
6403
6404 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6405 struct nfs_open_context *ctx,
6406 struct nfs4_lock_state *lsp,
6407 struct nfs_seqid *seqid)
6408 {
6409 struct nfs4_unlockdata *data;
6410 struct rpc_message msg = {
6411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6412 .rpc_cred = ctx->cred,
6413 };
6414 struct rpc_task_setup task_setup_data = {
6415 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6416 .rpc_message = &msg,
6417 .callback_ops = &nfs4_locku_ops,
6418 .workqueue = nfsiod_workqueue,
6419 .flags = RPC_TASK_ASYNC,
6420 };
6421
6422 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6423 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6424
6425 /* Ensure this is an unlock - when canceling a lock, the
6426 * canceled lock is passed in, and it won't be an unlock.
6427 */
6428 fl->fl_type = F_UNLCK;
6429 if (fl->fl_flags & FL_CLOSE)
6430 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
6431
6432 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6433 if (data == NULL) {
6434 nfs_free_seqid(seqid);
6435 return ERR_PTR(-ENOMEM);
6436 }
6437
6438 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0);
6439 msg.rpc_argp = &data->arg;
6440 msg.rpc_resp = &data->res;
6441 task_setup_data.callback_data = data;
6442 return rpc_run_task(&task_setup_data);
6443 }
6444
6445 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6446 {
6447 struct inode *inode = state->inode;
6448 struct nfs4_state_owner *sp = state->owner;
6449 struct nfs_inode *nfsi = NFS_I(inode);
6450 struct nfs_seqid *seqid;
6451 struct nfs4_lock_state *lsp;
6452 struct rpc_task *task;
6453 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6454 int status = 0;
6455 unsigned char fl_flags = request->fl_flags;
6456
6457 status = nfs4_set_lock_state(state, request);
6458 /* Unlock _before_ we do the RPC call */
6459 request->fl_flags |= FL_EXISTS;
6460 /* Exclude nfs_delegation_claim_locks() */
6461 mutex_lock(&sp->so_delegreturn_mutex);
6462 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
6463 down_read(&nfsi->rwsem);
6464 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6465 up_read(&nfsi->rwsem);
6466 mutex_unlock(&sp->so_delegreturn_mutex);
6467 goto out;
6468 }
6469 up_read(&nfsi->rwsem);
6470 mutex_unlock(&sp->so_delegreturn_mutex);
6471 if (status != 0)
6472 goto out;
6473 /* Is this a delegated lock? */
6474 lsp = request->fl_u.nfs4_fl.owner;
6475 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6476 goto out;
6477 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6478 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6479 status = -ENOMEM;
6480 if (IS_ERR(seqid))
6481 goto out;
6482 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6483 status = PTR_ERR(task);
6484 if (IS_ERR(task))
6485 goto out;
6486 status = rpc_wait_for_completion_task(task);
6487 rpc_put_task(task);
6488 out:
6489 request->fl_flags = fl_flags;
6490 trace_nfs4_unlock(request, state, F_SETLK, status);
6491 return status;
6492 }
6493
6494 struct nfs4_lockdata {
6495 struct nfs_lock_args arg;
6496 struct nfs_lock_res res;
6497 struct nfs4_lock_state *lsp;
6498 struct nfs_open_context *ctx;
6499 struct file_lock fl;
6500 unsigned long timestamp;
6501 int rpc_status;
6502 int cancelled;
6503 struct nfs_server *server;
6504 };
6505
6506 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6507 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6508 gfp_t gfp_mask)
6509 {
6510 struct nfs4_lockdata *p;
6511 struct inode *inode = lsp->ls_state->inode;
6512 struct nfs_server *server = NFS_SERVER(inode);
6513 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6514
6515 p = kzalloc(sizeof(*p), gfp_mask);
6516 if (p == NULL)
6517 return NULL;
6518
6519 p->arg.fh = NFS_FH(inode);
6520 p->arg.fl = &p->fl;
6521 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6522 if (IS_ERR(p->arg.open_seqid))
6523 goto out_free;
6524 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6525 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6526 if (IS_ERR(p->arg.lock_seqid))
6527 goto out_free_seqid;
6528 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6529 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6530 p->arg.lock_owner.s_dev = server->s_dev;
6531 p->res.lock_seqid = p->arg.lock_seqid;
6532 p->lsp = lsp;
6533 p->server = server;
6534 refcount_inc(&lsp->ls_count);
6535 p->ctx = get_nfs_open_context(ctx);
6536 memcpy(&p->fl, fl, sizeof(p->fl));
6537 return p;
6538 out_free_seqid:
6539 nfs_free_seqid(p->arg.open_seqid);
6540 out_free:
6541 kfree(p);
6542 return NULL;
6543 }
6544
6545 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6546 {
6547 struct nfs4_lockdata *data = calldata;
6548 struct nfs4_state *state = data->lsp->ls_state;
6549
6550 dprintk("%s: begin!\n", __func__);
6551 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6552 goto out_wait;
6553 /* Do we need to do an open_to_lock_owner? */
6554 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6555 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6556 goto out_release_lock_seqid;
6557 }
6558 nfs4_stateid_copy(&data->arg.open_stateid,
6559 &state->open_stateid);
6560 data->arg.new_lock_owner = 1;
6561 data->res.open_seqid = data->arg.open_seqid;
6562 } else {
6563 data->arg.new_lock_owner = 0;
6564 nfs4_stateid_copy(&data->arg.lock_stateid,
6565 &data->lsp->ls_stateid);
6566 }
6567 if (!nfs4_valid_open_stateid(state)) {
6568 data->rpc_status = -EBADF;
6569 task->tk_action = NULL;
6570 goto out_release_open_seqid;
6571 }
6572 data->timestamp = jiffies;
6573 if (nfs4_setup_sequence(data->server->nfs_client,
6574 &data->arg.seq_args,
6575 &data->res.seq_res,
6576 task) == 0)
6577 return;
6578 out_release_open_seqid:
6579 nfs_release_seqid(data->arg.open_seqid);
6580 out_release_lock_seqid:
6581 nfs_release_seqid(data->arg.lock_seqid);
6582 out_wait:
6583 nfs4_sequence_done(task, &data->res.seq_res);
6584 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6585 }
6586
6587 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6588 {
6589 struct nfs4_lockdata *data = calldata;
6590 struct nfs4_lock_state *lsp = data->lsp;
6591
6592 dprintk("%s: begin!\n", __func__);
6593
6594 if (!nfs4_sequence_done(task, &data->res.seq_res))
6595 return;
6596
6597 data->rpc_status = task->tk_status;
6598 switch (task->tk_status) {
6599 case 0:
6600 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6601 data->timestamp);
6602 if (data->arg.new_lock && !data->cancelled) {
6603 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6604 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
6605 goto out_restart;
6606 }
6607 if (data->arg.new_lock_owner != 0) {
6608 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6609 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6610 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6611 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6612 goto out_restart;
6613 break;
6614 case -NFS4ERR_BAD_STATEID:
6615 case -NFS4ERR_OLD_STATEID:
6616 case -NFS4ERR_STALE_STATEID:
6617 case -NFS4ERR_EXPIRED:
6618 if (data->arg.new_lock_owner != 0) {
6619 if (!nfs4_stateid_match(&data->arg.open_stateid,
6620 &lsp->ls_state->open_stateid))
6621 goto out_restart;
6622 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6623 &lsp->ls_stateid))
6624 goto out_restart;
6625 }
6626 out_done:
6627 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6628 return;
6629 out_restart:
6630 if (!data->cancelled)
6631 rpc_restart_call_prepare(task);
6632 goto out_done;
6633 }
6634
6635 static void nfs4_lock_release(void *calldata)
6636 {
6637 struct nfs4_lockdata *data = calldata;
6638
6639 dprintk("%s: begin!\n", __func__);
6640 nfs_free_seqid(data->arg.open_seqid);
6641 if (data->cancelled && data->rpc_status == 0) {
6642 struct rpc_task *task;
6643 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6644 data->arg.lock_seqid);
6645 if (!IS_ERR(task))
6646 rpc_put_task_async(task);
6647 dprintk("%s: cancelling lock!\n", __func__);
6648 } else
6649 nfs_free_seqid(data->arg.lock_seqid);
6650 nfs4_put_lock_state(data->lsp);
6651 put_nfs_open_context(data->ctx);
6652 kfree(data);
6653 dprintk("%s: done!\n", __func__);
6654 }
6655
6656 static const struct rpc_call_ops nfs4_lock_ops = {
6657 .rpc_call_prepare = nfs4_lock_prepare,
6658 .rpc_call_done = nfs4_lock_done,
6659 .rpc_release = nfs4_lock_release,
6660 };
6661
6662 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6663 {
6664 switch (error) {
6665 case -NFS4ERR_ADMIN_REVOKED:
6666 case -NFS4ERR_EXPIRED:
6667 case -NFS4ERR_BAD_STATEID:
6668 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6669 if (new_lock_owner != 0 ||
6670 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6671 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6672 break;
6673 case -NFS4ERR_STALE_STATEID:
6674 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6675 nfs4_schedule_lease_recovery(server->nfs_client);
6676 };
6677 }
6678
6679 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6680 {
6681 struct nfs4_lockdata *data;
6682 struct rpc_task *task;
6683 struct rpc_message msg = {
6684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6685 .rpc_cred = state->owner->so_cred,
6686 };
6687 struct rpc_task_setup task_setup_data = {
6688 .rpc_client = NFS_CLIENT(state->inode),
6689 .rpc_message = &msg,
6690 .callback_ops = &nfs4_lock_ops,
6691 .workqueue = nfsiod_workqueue,
6692 .flags = RPC_TASK_ASYNC,
6693 };
6694 int ret;
6695
6696 dprintk("%s: begin!\n", __func__);
6697 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6698 fl->fl_u.nfs4_fl.owner,
6699 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6700 if (data == NULL)
6701 return -ENOMEM;
6702 if (IS_SETLKW(cmd))
6703 data->arg.block = 1;
6704 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1,
6705 recovery_type > NFS_LOCK_NEW);
6706 msg.rpc_argp = &data->arg;
6707 msg.rpc_resp = &data->res;
6708 task_setup_data.callback_data = data;
6709 if (recovery_type > NFS_LOCK_NEW) {
6710 if (recovery_type == NFS_LOCK_RECLAIM)
6711 data->arg.reclaim = NFS_LOCK_RECLAIM;
6712 } else
6713 data->arg.new_lock = 1;
6714 task = rpc_run_task(&task_setup_data);
6715 if (IS_ERR(task))
6716 return PTR_ERR(task);
6717 ret = rpc_wait_for_completion_task(task);
6718 if (ret == 0) {
6719 ret = data->rpc_status;
6720 if (ret)
6721 nfs4_handle_setlk_error(data->server, data->lsp,
6722 data->arg.new_lock_owner, ret);
6723 } else
6724 data->cancelled = true;
6725 rpc_put_task(task);
6726 dprintk("%s: done, ret = %d!\n", __func__, ret);
6727 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6728 return ret;
6729 }
6730
6731 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6732 {
6733 struct nfs_server *server = NFS_SERVER(state->inode);
6734 struct nfs4_exception exception = {
6735 .inode = state->inode,
6736 };
6737 int err;
6738
6739 do {
6740 /* Cache the lock if possible... */
6741 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6742 return 0;
6743 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6744 if (err != -NFS4ERR_DELAY)
6745 break;
6746 nfs4_handle_exception(server, err, &exception);
6747 } while (exception.retry);
6748 return err;
6749 }
6750
6751 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6752 {
6753 struct nfs_server *server = NFS_SERVER(state->inode);
6754 struct nfs4_exception exception = {
6755 .inode = state->inode,
6756 };
6757 int err;
6758
6759 err = nfs4_set_lock_state(state, request);
6760 if (err != 0)
6761 return err;
6762 if (!recover_lost_locks) {
6763 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6764 return 0;
6765 }
6766 do {
6767 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6768 return 0;
6769 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6770 switch (err) {
6771 default:
6772 goto out;
6773 case -NFS4ERR_GRACE:
6774 case -NFS4ERR_DELAY:
6775 nfs4_handle_exception(server, err, &exception);
6776 err = 0;
6777 }
6778 } while (exception.retry);
6779 out:
6780 return err;
6781 }
6782
6783 #if defined(CONFIG_NFS_V4_1)
6784 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6785 {
6786 struct nfs4_lock_state *lsp;
6787 int status;
6788
6789 status = nfs4_set_lock_state(state, request);
6790 if (status != 0)
6791 return status;
6792 lsp = request->fl_u.nfs4_fl.owner;
6793 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6794 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6795 return 0;
6796 return nfs4_lock_expired(state, request);
6797 }
6798 #endif
6799
6800 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6801 {
6802 struct nfs_inode *nfsi = NFS_I(state->inode);
6803 struct nfs4_state_owner *sp = state->owner;
6804 unsigned char fl_flags = request->fl_flags;
6805 int status;
6806
6807 request->fl_flags |= FL_ACCESS;
6808 status = locks_lock_inode_wait(state->inode, request);
6809 if (status < 0)
6810 goto out;
6811 mutex_lock(&sp->so_delegreturn_mutex);
6812 down_read(&nfsi->rwsem);
6813 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6814 /* Yes: cache locks! */
6815 /* ...but avoid races with delegation recall... */
6816 request->fl_flags = fl_flags & ~FL_SLEEP;
6817 status = locks_lock_inode_wait(state->inode, request);
6818 up_read(&nfsi->rwsem);
6819 mutex_unlock(&sp->so_delegreturn_mutex);
6820 goto out;
6821 }
6822 up_read(&nfsi->rwsem);
6823 mutex_unlock(&sp->so_delegreturn_mutex);
6824 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6825 out:
6826 request->fl_flags = fl_flags;
6827 return status;
6828 }
6829
6830 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6831 {
6832 struct nfs4_exception exception = {
6833 .state = state,
6834 .inode = state->inode,
6835 };
6836 int err;
6837
6838 do {
6839 err = _nfs4_proc_setlk(state, cmd, request);
6840 if (err == -NFS4ERR_DENIED)
6841 err = -EAGAIN;
6842 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6843 err, &exception);
6844 } while (exception.retry);
6845 return err;
6846 }
6847
6848 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6849 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6850
6851 static int
6852 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6853 struct file_lock *request)
6854 {
6855 int status = -ERESTARTSYS;
6856 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6857
6858 while(!signalled()) {
6859 status = nfs4_proc_setlk(state, cmd, request);
6860 if ((status != -EAGAIN) || IS_SETLK(cmd))
6861 break;
6862 freezable_schedule_timeout_interruptible(timeout);
6863 timeout *= 2;
6864 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6865 status = -ERESTARTSYS;
6866 }
6867 return status;
6868 }
6869
6870 #ifdef CONFIG_NFS_V4_1
6871 struct nfs4_lock_waiter {
6872 struct task_struct *task;
6873 struct inode *inode;
6874 struct nfs_lowner *owner;
6875 bool notified;
6876 };
6877
6878 static int
6879 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
6880 {
6881 int ret;
6882 struct nfs4_lock_waiter *waiter = wait->private;
6883
6884 /* NULL key means to wake up everyone */
6885 if (key) {
6886 struct cb_notify_lock_args *cbnl = key;
6887 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6888 *wowner = waiter->owner;
6889
6890 /* Only wake if the callback was for the same owner. */
6891 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
6892 return 0;
6893
6894 /* Make sure it's for the right inode */
6895 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6896 return 0;
6897
6898 waiter->notified = true;
6899 }
6900
6901 /* override "private" so we can use default_wake_function */
6902 wait->private = waiter->task;
6903 ret = autoremove_wake_function(wait, mode, flags, key);
6904 wait->private = waiter;
6905 return ret;
6906 }
6907
6908 static int
6909 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6910 {
6911 int status = -ERESTARTSYS;
6912 unsigned long flags;
6913 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6914 struct nfs_server *server = NFS_SERVER(state->inode);
6915 struct nfs_client *clp = server->nfs_client;
6916 wait_queue_head_t *q = &clp->cl_lock_waitq;
6917 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6918 .id = lsp->ls_seqid.owner_id,
6919 .s_dev = server->s_dev };
6920 struct nfs4_lock_waiter waiter = { .task = current,
6921 .inode = state->inode,
6922 .owner = &owner,
6923 .notified = false };
6924 wait_queue_entry_t wait;
6925
6926 /* Don't bother with waitqueue if we don't expect a callback */
6927 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6928 return nfs4_retry_setlk_simple(state, cmd, request);
6929
6930 init_wait(&wait);
6931 wait.private = &waiter;
6932 wait.func = nfs4_wake_lock_waiter;
6933 add_wait_queue(q, &wait);
6934
6935 while(!signalled()) {
6936 waiter.notified = false;
6937 status = nfs4_proc_setlk(state, cmd, request);
6938 if ((status != -EAGAIN) || IS_SETLK(cmd))
6939 break;
6940
6941 status = -ERESTARTSYS;
6942 spin_lock_irqsave(&q->lock, flags);
6943 if (waiter.notified) {
6944 spin_unlock_irqrestore(&q->lock, flags);
6945 continue;
6946 }
6947 set_current_state(TASK_INTERRUPTIBLE);
6948 spin_unlock_irqrestore(&q->lock, flags);
6949
6950 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
6951 }
6952
6953 finish_wait(q, &wait);
6954 return status;
6955 }
6956 #else /* !CONFIG_NFS_V4_1 */
6957 static inline int
6958 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6959 {
6960 return nfs4_retry_setlk_simple(state, cmd, request);
6961 }
6962 #endif
6963
6964 static int
6965 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6966 {
6967 struct nfs_open_context *ctx;
6968 struct nfs4_state *state;
6969 int status;
6970
6971 /* verify open state */
6972 ctx = nfs_file_open_context(filp);
6973 state = ctx->state;
6974
6975 if (IS_GETLK(cmd)) {
6976 if (state != NULL)
6977 return nfs4_proc_getlk(state, F_GETLK, request);
6978 return 0;
6979 }
6980
6981 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6982 return -EINVAL;
6983
6984 if (request->fl_type == F_UNLCK) {
6985 if (state != NULL)
6986 return nfs4_proc_unlck(state, cmd, request);
6987 return 0;
6988 }
6989
6990 if (state == NULL)
6991 return -ENOLCK;
6992
6993 if ((request->fl_flags & FL_POSIX) &&
6994 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6995 return -ENOLCK;
6996
6997 /*
6998 * Don't rely on the VFS having checked the file open mode,
6999 * since it won't do this for flock() locks.
7000 */
7001 switch (request->fl_type) {
7002 case F_RDLCK:
7003 if (!(filp->f_mode & FMODE_READ))
7004 return -EBADF;
7005 break;
7006 case F_WRLCK:
7007 if (!(filp->f_mode & FMODE_WRITE))
7008 return -EBADF;
7009 }
7010
7011 status = nfs4_set_lock_state(state, request);
7012 if (status != 0)
7013 return status;
7014
7015 return nfs4_retry_setlk(state, cmd, request);
7016 }
7017
7018 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
7019 {
7020 struct nfs_server *server = NFS_SERVER(state->inode);
7021 int err;
7022
7023 err = nfs4_set_lock_state(state, fl);
7024 if (err != 0)
7025 return err;
7026 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
7027 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
7028 }
7029
7030 struct nfs_release_lockowner_data {
7031 struct nfs4_lock_state *lsp;
7032 struct nfs_server *server;
7033 struct nfs_release_lockowner_args args;
7034 struct nfs_release_lockowner_res res;
7035 unsigned long timestamp;
7036 };
7037
7038 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
7039 {
7040 struct nfs_release_lockowner_data *data = calldata;
7041 struct nfs_server *server = data->server;
7042 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
7043 &data->res.seq_res, task);
7044 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7045 data->timestamp = jiffies;
7046 }
7047
7048 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
7049 {
7050 struct nfs_release_lockowner_data *data = calldata;
7051 struct nfs_server *server = data->server;
7052
7053 nfs40_sequence_done(task, &data->res.seq_res);
7054
7055 switch (task->tk_status) {
7056 case 0:
7057 renew_lease(server, data->timestamp);
7058 break;
7059 case -NFS4ERR_STALE_CLIENTID:
7060 case -NFS4ERR_EXPIRED:
7061 nfs4_schedule_lease_recovery(server->nfs_client);
7062 break;
7063 case -NFS4ERR_LEASE_MOVED:
7064 case -NFS4ERR_DELAY:
7065 if (nfs4_async_handle_error(task, server,
7066 NULL, NULL) == -EAGAIN)
7067 rpc_restart_call_prepare(task);
7068 }
7069 }
7070
7071 static void nfs4_release_lockowner_release(void *calldata)
7072 {
7073 struct nfs_release_lockowner_data *data = calldata;
7074 nfs4_free_lock_state(data->server, data->lsp);
7075 kfree(calldata);
7076 }
7077
7078 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
7079 .rpc_call_prepare = nfs4_release_lockowner_prepare,
7080 .rpc_call_done = nfs4_release_lockowner_done,
7081 .rpc_release = nfs4_release_lockowner_release,
7082 };
7083
7084 static void
7085 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
7086 {
7087 struct nfs_release_lockowner_data *data;
7088 struct rpc_message msg = {
7089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
7090 };
7091
7092 if (server->nfs_client->cl_mvops->minor_version != 0)
7093 return;
7094
7095 data = kmalloc(sizeof(*data), GFP_NOFS);
7096 if (!data)
7097 return;
7098 data->lsp = lsp;
7099 data->server = server;
7100 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
7101 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
7102 data->args.lock_owner.s_dev = server->s_dev;
7103
7104 msg.rpc_argp = &data->args;
7105 msg.rpc_resp = &data->res;
7106 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
7107 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
7108 }
7109
7110 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
7111
7112 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
7113 struct dentry *unused, struct inode *inode,
7114 const char *key, const void *buf,
7115 size_t buflen, int flags)
7116 {
7117 return nfs4_proc_set_acl(inode, buf, buflen);
7118 }
7119
7120 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
7121 struct dentry *unused, struct inode *inode,
7122 const char *key, void *buf, size_t buflen)
7123 {
7124 return nfs4_proc_get_acl(inode, buf, buflen);
7125 }
7126
7127 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
7128 {
7129 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
7130 }
7131
7132 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
7133
7134 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
7135 struct dentry *unused, struct inode *inode,
7136 const char *key, const void *buf,
7137 size_t buflen, int flags)
7138 {
7139 if (security_ismaclabel(key))
7140 return nfs4_set_security_label(inode, buf, buflen);
7141
7142 return -EOPNOTSUPP;
7143 }
7144
7145 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
7146 struct dentry *unused, struct inode *inode,
7147 const char *key, void *buf, size_t buflen)
7148 {
7149 if (security_ismaclabel(key))
7150 return nfs4_get_security_label(inode, buf, buflen);
7151 return -EOPNOTSUPP;
7152 }
7153
7154 static ssize_t
7155 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7156 {
7157 int len = 0;
7158
7159 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
7160 len = security_inode_listsecurity(inode, list, list_len);
7161 if (list_len && len > list_len)
7162 return -ERANGE;
7163 }
7164 return len;
7165 }
7166
7167 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
7168 .prefix = XATTR_SECURITY_PREFIX,
7169 .get = nfs4_xattr_get_nfs4_label,
7170 .set = nfs4_xattr_set_nfs4_label,
7171 };
7172
7173 #else
7174
7175 static ssize_t
7176 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
7177 {
7178 return 0;
7179 }
7180
7181 #endif
7182
7183 /*
7184 * nfs_fhget will use either the mounted_on_fileid or the fileid
7185 */
7186 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
7187 {
7188 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
7189 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
7190 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
7191 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
7192 return;
7193
7194 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
7195 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
7196 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
7197 fattr->nlink = 2;
7198 }
7199
7200 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7201 const struct qstr *name,
7202 struct nfs4_fs_locations *fs_locations,
7203 struct page *page)
7204 {
7205 struct nfs_server *server = NFS_SERVER(dir);
7206 u32 bitmask[3];
7207 struct nfs4_fs_locations_arg args = {
7208 .dir_fh = NFS_FH(dir),
7209 .name = name,
7210 .page = page,
7211 .bitmask = bitmask,
7212 };
7213 struct nfs4_fs_locations_res res = {
7214 .fs_locations = fs_locations,
7215 };
7216 struct rpc_message msg = {
7217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7218 .rpc_argp = &args,
7219 .rpc_resp = &res,
7220 };
7221 int status;
7222
7223 dprintk("%s: start\n", __func__);
7224
7225 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
7226 bitmask[1] = nfs4_fattr_bitmap[1];
7227
7228 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
7229 * is not supported */
7230 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
7231 bitmask[0] &= ~FATTR4_WORD0_FILEID;
7232 else
7233 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
7234
7235 nfs_fattr_init(&fs_locations->fattr);
7236 fs_locations->server = server;
7237 fs_locations->nlocations = 0;
7238 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
7239 dprintk("%s: returned status = %d\n", __func__, status);
7240 return status;
7241 }
7242
7243 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
7244 const struct qstr *name,
7245 struct nfs4_fs_locations *fs_locations,
7246 struct page *page)
7247 {
7248 struct nfs4_exception exception = { };
7249 int err;
7250 do {
7251 err = _nfs4_proc_fs_locations(client, dir, name,
7252 fs_locations, page);
7253 trace_nfs4_get_fs_locations(dir, name, err);
7254 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7255 &exception);
7256 } while (exception.retry);
7257 return err;
7258 }
7259
7260 /*
7261 * This operation also signals the server that this client is
7262 * performing migration recovery. The server can stop returning
7263 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
7264 * appended to this compound to identify the client ID which is
7265 * performing recovery.
7266 */
7267 static int _nfs40_proc_get_locations(struct inode *inode,
7268 struct nfs4_fs_locations *locations,
7269 struct page *page, struct rpc_cred *cred)
7270 {
7271 struct nfs_server *server = NFS_SERVER(inode);
7272 struct rpc_clnt *clnt = server->client;
7273 u32 bitmask[2] = {
7274 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7275 };
7276 struct nfs4_fs_locations_arg args = {
7277 .clientid = server->nfs_client->cl_clientid,
7278 .fh = NFS_FH(inode),
7279 .page = page,
7280 .bitmask = bitmask,
7281 .migration = 1, /* skip LOOKUP */
7282 .renew = 1, /* append RENEW */
7283 };
7284 struct nfs4_fs_locations_res res = {
7285 .fs_locations = locations,
7286 .migration = 1,
7287 .renew = 1,
7288 };
7289 struct rpc_message msg = {
7290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7291 .rpc_argp = &args,
7292 .rpc_resp = &res,
7293 .rpc_cred = cred,
7294 };
7295 unsigned long now = jiffies;
7296 int status;
7297
7298 nfs_fattr_init(&locations->fattr);
7299 locations->server = server;
7300 locations->nlocations = 0;
7301
7302 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7303 status = nfs4_call_sync_sequence(clnt, server, &msg,
7304 &args.seq_args, &res.seq_res);
7305 if (status)
7306 return status;
7307
7308 renew_lease(server, now);
7309 return 0;
7310 }
7311
7312 #ifdef CONFIG_NFS_V4_1
7313
7314 /*
7315 * This operation also signals the server that this client is
7316 * performing migration recovery. The server can stop asserting
7317 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7318 * performing this operation is identified in the SEQUENCE
7319 * operation in this compound.
7320 *
7321 * When the client supports GETATTR(fs_locations_info), it can
7322 * be plumbed in here.
7323 */
7324 static int _nfs41_proc_get_locations(struct inode *inode,
7325 struct nfs4_fs_locations *locations,
7326 struct page *page, struct rpc_cred *cred)
7327 {
7328 struct nfs_server *server = NFS_SERVER(inode);
7329 struct rpc_clnt *clnt = server->client;
7330 u32 bitmask[2] = {
7331 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7332 };
7333 struct nfs4_fs_locations_arg args = {
7334 .fh = NFS_FH(inode),
7335 .page = page,
7336 .bitmask = bitmask,
7337 .migration = 1, /* skip LOOKUP */
7338 };
7339 struct nfs4_fs_locations_res res = {
7340 .fs_locations = locations,
7341 .migration = 1,
7342 };
7343 struct rpc_message msg = {
7344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7345 .rpc_argp = &args,
7346 .rpc_resp = &res,
7347 .rpc_cred = cred,
7348 };
7349 int status;
7350
7351 nfs_fattr_init(&locations->fattr);
7352 locations->server = server;
7353 locations->nlocations = 0;
7354
7355 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7356 status = nfs4_call_sync_sequence(clnt, server, &msg,
7357 &args.seq_args, &res.seq_res);
7358 if (status == NFS4_OK &&
7359 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7360 status = -NFS4ERR_LEASE_MOVED;
7361 return status;
7362 }
7363
7364 #endif /* CONFIG_NFS_V4_1 */
7365
7366 /**
7367 * nfs4_proc_get_locations - discover locations for a migrated FSID
7368 * @inode: inode on FSID that is migrating
7369 * @locations: result of query
7370 * @page: buffer
7371 * @cred: credential to use for this operation
7372 *
7373 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7374 * operation failed, or a negative errno if a local error occurred.
7375 *
7376 * On success, "locations" is filled in, but if the server has
7377 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7378 * asserted.
7379 *
7380 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7381 * from this client that require migration recovery.
7382 */
7383 int nfs4_proc_get_locations(struct inode *inode,
7384 struct nfs4_fs_locations *locations,
7385 struct page *page, struct rpc_cred *cred)
7386 {
7387 struct nfs_server *server = NFS_SERVER(inode);
7388 struct nfs_client *clp = server->nfs_client;
7389 const struct nfs4_mig_recovery_ops *ops =
7390 clp->cl_mvops->mig_recovery_ops;
7391 struct nfs4_exception exception = { };
7392 int status;
7393
7394 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7395 (unsigned long long)server->fsid.major,
7396 (unsigned long long)server->fsid.minor,
7397 clp->cl_hostname);
7398 nfs_display_fhandle(NFS_FH(inode), __func__);
7399
7400 do {
7401 status = ops->get_locations(inode, locations, page, cred);
7402 if (status != -NFS4ERR_DELAY)
7403 break;
7404 nfs4_handle_exception(server, status, &exception);
7405 } while (exception.retry);
7406 return status;
7407 }
7408
7409 /*
7410 * This operation also signals the server that this client is
7411 * performing "lease moved" recovery. The server can stop
7412 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7413 * is appended to this compound to identify the client ID which is
7414 * performing recovery.
7415 */
7416 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7417 {
7418 struct nfs_server *server = NFS_SERVER(inode);
7419 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7420 struct rpc_clnt *clnt = server->client;
7421 struct nfs4_fsid_present_arg args = {
7422 .fh = NFS_FH(inode),
7423 .clientid = clp->cl_clientid,
7424 .renew = 1, /* append RENEW */
7425 };
7426 struct nfs4_fsid_present_res res = {
7427 .renew = 1,
7428 };
7429 struct rpc_message msg = {
7430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7431 .rpc_argp = &args,
7432 .rpc_resp = &res,
7433 .rpc_cred = cred,
7434 };
7435 unsigned long now = jiffies;
7436 int status;
7437
7438 res.fh = nfs_alloc_fhandle();
7439 if (res.fh == NULL)
7440 return -ENOMEM;
7441
7442 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7443 status = nfs4_call_sync_sequence(clnt, server, &msg,
7444 &args.seq_args, &res.seq_res);
7445 nfs_free_fhandle(res.fh);
7446 if (status)
7447 return status;
7448
7449 do_renew_lease(clp, now);
7450 return 0;
7451 }
7452
7453 #ifdef CONFIG_NFS_V4_1
7454
7455 /*
7456 * This operation also signals the server that this client is
7457 * performing "lease moved" recovery. The server can stop asserting
7458 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7459 * this operation is identified in the SEQUENCE operation in this
7460 * compound.
7461 */
7462 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7463 {
7464 struct nfs_server *server = NFS_SERVER(inode);
7465 struct rpc_clnt *clnt = server->client;
7466 struct nfs4_fsid_present_arg args = {
7467 .fh = NFS_FH(inode),
7468 };
7469 struct nfs4_fsid_present_res res = {
7470 };
7471 struct rpc_message msg = {
7472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7473 .rpc_argp = &args,
7474 .rpc_resp = &res,
7475 .rpc_cred = cred,
7476 };
7477 int status;
7478
7479 res.fh = nfs_alloc_fhandle();
7480 if (res.fh == NULL)
7481 return -ENOMEM;
7482
7483 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
7484 status = nfs4_call_sync_sequence(clnt, server, &msg,
7485 &args.seq_args, &res.seq_res);
7486 nfs_free_fhandle(res.fh);
7487 if (status == NFS4_OK &&
7488 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7489 status = -NFS4ERR_LEASE_MOVED;
7490 return status;
7491 }
7492
7493 #endif /* CONFIG_NFS_V4_1 */
7494
7495 /**
7496 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7497 * @inode: inode on FSID to check
7498 * @cred: credential to use for this operation
7499 *
7500 * Server indicates whether the FSID is present, moved, or not
7501 * recognized. This operation is necessary to clear a LEASE_MOVED
7502 * condition for this client ID.
7503 *
7504 * Returns NFS4_OK if the FSID is present on this server,
7505 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7506 * NFS4ERR code if some error occurred on the server, or a
7507 * negative errno if a local failure occurred.
7508 */
7509 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7510 {
7511 struct nfs_server *server = NFS_SERVER(inode);
7512 struct nfs_client *clp = server->nfs_client;
7513 const struct nfs4_mig_recovery_ops *ops =
7514 clp->cl_mvops->mig_recovery_ops;
7515 struct nfs4_exception exception = { };
7516 int status;
7517
7518 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7519 (unsigned long long)server->fsid.major,
7520 (unsigned long long)server->fsid.minor,
7521 clp->cl_hostname);
7522 nfs_display_fhandle(NFS_FH(inode), __func__);
7523
7524 do {
7525 status = ops->fsid_present(inode, cred);
7526 if (status != -NFS4ERR_DELAY)
7527 break;
7528 nfs4_handle_exception(server, status, &exception);
7529 } while (exception.retry);
7530 return status;
7531 }
7532
7533 /**
7534 * If 'use_integrity' is true and the state managment nfs_client
7535 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7536 * and the machine credential as per RFC3530bis and RFC5661 Security
7537 * Considerations sections. Otherwise, just use the user cred with the
7538 * filesystem's rpc_client.
7539 */
7540 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7541 {
7542 int status;
7543 struct nfs4_secinfo_arg args = {
7544 .dir_fh = NFS_FH(dir),
7545 .name = name,
7546 };
7547 struct nfs4_secinfo_res res = {
7548 .flavors = flavors,
7549 };
7550 struct rpc_message msg = {
7551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7552 .rpc_argp = &args,
7553 .rpc_resp = &res,
7554 };
7555 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7556 struct rpc_cred *cred = NULL;
7557
7558 if (use_integrity) {
7559 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7560 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7561 msg.rpc_cred = cred;
7562 }
7563
7564 dprintk("NFS call secinfo %s\n", name->name);
7565
7566 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7567 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7568
7569 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7570 &res.seq_res, 0);
7571 dprintk("NFS reply secinfo: %d\n", status);
7572
7573 if (cred)
7574 put_rpccred(cred);
7575
7576 return status;
7577 }
7578
7579 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7580 struct nfs4_secinfo_flavors *flavors)
7581 {
7582 struct nfs4_exception exception = { };
7583 int err;
7584 do {
7585 err = -NFS4ERR_WRONGSEC;
7586
7587 /* try to use integrity protection with machine cred */
7588 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7589 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7590
7591 /*
7592 * if unable to use integrity protection, or SECINFO with
7593 * integrity protection returns NFS4ERR_WRONGSEC (which is
7594 * disallowed by spec, but exists in deployed servers) use
7595 * the current filesystem's rpc_client and the user cred.
7596 */
7597 if (err == -NFS4ERR_WRONGSEC)
7598 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7599
7600 trace_nfs4_secinfo(dir, name, err);
7601 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7602 &exception);
7603 } while (exception.retry);
7604 return err;
7605 }
7606
7607 #ifdef CONFIG_NFS_V4_1
7608 /*
7609 * Check the exchange flags returned by the server for invalid flags, having
7610 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7611 * DS flags set.
7612 */
7613 static int nfs4_check_cl_exchange_flags(u32 flags)
7614 {
7615 if (flags & ~EXCHGID4_FLAG_MASK_R)
7616 goto out_inval;
7617 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7618 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7619 goto out_inval;
7620 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7621 goto out_inval;
7622 return NFS_OK;
7623 out_inval:
7624 return -NFS4ERR_INVAL;
7625 }
7626
7627 static bool
7628 nfs41_same_server_scope(struct nfs41_server_scope *a,
7629 struct nfs41_server_scope *b)
7630 {
7631 if (a->server_scope_sz != b->server_scope_sz)
7632 return false;
7633 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7634 }
7635
7636 static void
7637 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7638 {
7639 }
7640
7641 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7642 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7643 };
7644
7645 /*
7646 * nfs4_proc_bind_one_conn_to_session()
7647 *
7648 * The 4.1 client currently uses the same TCP connection for the
7649 * fore and backchannel.
7650 */
7651 static
7652 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7653 struct rpc_xprt *xprt,
7654 struct nfs_client *clp,
7655 struct rpc_cred *cred)
7656 {
7657 int status;
7658 struct nfs41_bind_conn_to_session_args args = {
7659 .client = clp,
7660 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7661 };
7662 struct nfs41_bind_conn_to_session_res res;
7663 struct rpc_message msg = {
7664 .rpc_proc =
7665 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7666 .rpc_argp = &args,
7667 .rpc_resp = &res,
7668 .rpc_cred = cred,
7669 };
7670 struct rpc_task_setup task_setup_data = {
7671 .rpc_client = clnt,
7672 .rpc_xprt = xprt,
7673 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7674 .rpc_message = &msg,
7675 .flags = RPC_TASK_TIMEOUT,
7676 };
7677 struct rpc_task *task;
7678
7679 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7680 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7681 args.dir = NFS4_CDFC4_FORE;
7682
7683 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7684 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7685 args.dir = NFS4_CDFC4_FORE;
7686
7687 task = rpc_run_task(&task_setup_data);
7688 if (!IS_ERR(task)) {
7689 status = task->tk_status;
7690 rpc_put_task(task);
7691 } else
7692 status = PTR_ERR(task);
7693 trace_nfs4_bind_conn_to_session(clp, status);
7694 if (status == 0) {
7695 if (memcmp(res.sessionid.data,
7696 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7697 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7698 return -EIO;
7699 }
7700 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7701 dprintk("NFS: %s: Unexpected direction from server\n",
7702 __func__);
7703 return -EIO;
7704 }
7705 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7706 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7707 __func__);
7708 return -EIO;
7709 }
7710 }
7711
7712 return status;
7713 }
7714
7715 struct rpc_bind_conn_calldata {
7716 struct nfs_client *clp;
7717 struct rpc_cred *cred;
7718 };
7719
7720 static int
7721 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7722 struct rpc_xprt *xprt,
7723 void *calldata)
7724 {
7725 struct rpc_bind_conn_calldata *p = calldata;
7726
7727 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7728 }
7729
7730 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7731 {
7732 struct rpc_bind_conn_calldata data = {
7733 .clp = clp,
7734 .cred = cred,
7735 };
7736 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7737 nfs4_proc_bind_conn_to_session_callback, &data);
7738 }
7739
7740 /*
7741 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7742 * and operations we'd like to see to enable certain features in the allow map
7743 */
7744 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7745 .how = SP4_MACH_CRED,
7746 .enforce.u.words = {
7747 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7748 1 << (OP_EXCHANGE_ID - 32) |
7749 1 << (OP_CREATE_SESSION - 32) |
7750 1 << (OP_DESTROY_SESSION - 32) |
7751 1 << (OP_DESTROY_CLIENTID - 32)
7752 },
7753 .allow.u.words = {
7754 [0] = 1 << (OP_CLOSE) |
7755 1 << (OP_OPEN_DOWNGRADE) |
7756 1 << (OP_LOCKU) |
7757 1 << (OP_DELEGRETURN) |
7758 1 << (OP_COMMIT),
7759 [1] = 1 << (OP_SECINFO - 32) |
7760 1 << (OP_SECINFO_NO_NAME - 32) |
7761 1 << (OP_LAYOUTRETURN - 32) |
7762 1 << (OP_TEST_STATEID - 32) |
7763 1 << (OP_FREE_STATEID - 32) |
7764 1 << (OP_WRITE - 32)
7765 }
7766 };
7767
7768 /*
7769 * Select the state protection mode for client `clp' given the server results
7770 * from exchange_id in `sp'.
7771 *
7772 * Returns 0 on success, negative errno otherwise.
7773 */
7774 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7775 struct nfs41_state_protection *sp)
7776 {
7777 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7778 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7779 1 << (OP_EXCHANGE_ID - 32) |
7780 1 << (OP_CREATE_SESSION - 32) |
7781 1 << (OP_DESTROY_SESSION - 32) |
7782 1 << (OP_DESTROY_CLIENTID - 32)
7783 };
7784 unsigned long flags = 0;
7785 unsigned int i;
7786 int ret = 0;
7787
7788 if (sp->how == SP4_MACH_CRED) {
7789 /* Print state protect result */
7790 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7791 for (i = 0; i <= LAST_NFS4_OP; i++) {
7792 if (test_bit(i, sp->enforce.u.longs))
7793 dfprintk(MOUNT, " enforce op %d\n", i);
7794 if (test_bit(i, sp->allow.u.longs))
7795 dfprintk(MOUNT, " allow op %d\n", i);
7796 }
7797
7798 /* make sure nothing is on enforce list that isn't supported */
7799 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7800 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7801 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7802 ret = -EINVAL;
7803 goto out;
7804 }
7805 }
7806
7807 /*
7808 * Minimal mode - state operations are allowed to use machine
7809 * credential. Note this already happens by default, so the
7810 * client doesn't have to do anything more than the negotiation.
7811 *
7812 * NOTE: we don't care if EXCHANGE_ID is in the list -
7813 * we're already using the machine cred for exchange_id
7814 * and will never use a different cred.
7815 */
7816 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7817 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7818 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7819 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7820 dfprintk(MOUNT, "sp4_mach_cred:\n");
7821 dfprintk(MOUNT, " minimal mode enabled\n");
7822 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
7823 } else {
7824 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7825 ret = -EINVAL;
7826 goto out;
7827 }
7828
7829 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7830 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7831 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7832 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7833 dfprintk(MOUNT, " cleanup mode enabled\n");
7834 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
7835 }
7836
7837 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7838 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7839 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
7840 }
7841
7842 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7843 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7844 dfprintk(MOUNT, " secinfo mode enabled\n");
7845 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
7846 }
7847
7848 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7849 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7850 dfprintk(MOUNT, " stateid mode enabled\n");
7851 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
7852 }
7853
7854 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7855 dfprintk(MOUNT, " write mode enabled\n");
7856 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
7857 }
7858
7859 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7860 dfprintk(MOUNT, " commit mode enabled\n");
7861 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
7862 }
7863 }
7864 out:
7865 clp->cl_sp4_flags = flags;
7866 return ret;
7867 }
7868
7869 struct nfs41_exchange_id_data {
7870 struct nfs41_exchange_id_res res;
7871 struct nfs41_exchange_id_args args;
7872 };
7873
7874 static void nfs4_exchange_id_release(void *data)
7875 {
7876 struct nfs41_exchange_id_data *cdata =
7877 (struct nfs41_exchange_id_data *)data;
7878
7879 nfs_put_client(cdata->args.client);
7880 kfree(cdata->res.impl_id);
7881 kfree(cdata->res.server_scope);
7882 kfree(cdata->res.server_owner);
7883 kfree(cdata);
7884 }
7885
7886 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7887 .rpc_release = nfs4_exchange_id_release,
7888 };
7889
7890 /*
7891 * _nfs4_proc_exchange_id()
7892 *
7893 * Wrapper for EXCHANGE_ID operation.
7894 */
7895 static struct rpc_task *
7896 nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7897 u32 sp4_how, struct rpc_xprt *xprt)
7898 {
7899 struct rpc_message msg = {
7900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7901 .rpc_cred = cred,
7902 };
7903 struct rpc_task_setup task_setup_data = {
7904 .rpc_client = clp->cl_rpcclient,
7905 .callback_ops = &nfs4_exchange_id_call_ops,
7906 .rpc_message = &msg,
7907 .flags = RPC_TASK_TIMEOUT,
7908 };
7909 struct nfs41_exchange_id_data *calldata;
7910 int status;
7911
7912 if (!refcount_inc_not_zero(&clp->cl_count))
7913 return ERR_PTR(-EIO);
7914
7915 status = -ENOMEM;
7916 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7917 if (!calldata)
7918 goto out;
7919
7920 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
7921
7922 status = nfs4_init_uniform_client_string(clp);
7923 if (status)
7924 goto out_calldata;
7925
7926 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7927 GFP_NOFS);
7928 status = -ENOMEM;
7929 if (unlikely(calldata->res.server_owner == NULL))
7930 goto out_calldata;
7931
7932 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7933 GFP_NOFS);
7934 if (unlikely(calldata->res.server_scope == NULL))
7935 goto out_server_owner;
7936
7937 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7938 if (unlikely(calldata->res.impl_id == NULL))
7939 goto out_server_scope;
7940
7941 switch (sp4_how) {
7942 case SP4_NONE:
7943 calldata->args.state_protect.how = SP4_NONE;
7944 break;
7945
7946 case SP4_MACH_CRED:
7947 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7948 break;
7949
7950 default:
7951 /* unsupported! */
7952 WARN_ON_ONCE(1);
7953 status = -EINVAL;
7954 goto out_impl_id;
7955 }
7956 if (xprt) {
7957 task_setup_data.rpc_xprt = xprt;
7958 task_setup_data.flags |= RPC_TASK_SOFTCONN;
7959 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7960 sizeof(calldata->args.verifier.data));
7961 }
7962 calldata->args.client = clp;
7963 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7964 EXCHGID4_FLAG_BIND_PRINC_STATEID;
7965 #ifdef CONFIG_NFS_V4_1_MIGRATION
7966 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
7967 #endif
7968 msg.rpc_argp = &calldata->args;
7969 msg.rpc_resp = &calldata->res;
7970 task_setup_data.callback_data = calldata;
7971
7972 return rpc_run_task(&task_setup_data);
7973
7974 out_impl_id:
7975 kfree(calldata->res.impl_id);
7976 out_server_scope:
7977 kfree(calldata->res.server_scope);
7978 out_server_owner:
7979 kfree(calldata->res.server_owner);
7980 out_calldata:
7981 kfree(calldata);
7982 out:
7983 nfs_put_client(clp);
7984 return ERR_PTR(status);
7985 }
7986
7987 /*
7988 * _nfs4_proc_exchange_id()
7989 *
7990 * Wrapper for EXCHANGE_ID operation.
7991 */
7992 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7993 u32 sp4_how)
7994 {
7995 struct rpc_task *task;
7996 struct nfs41_exchange_id_args *argp;
7997 struct nfs41_exchange_id_res *resp;
7998 int status;
7999
8000 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
8001 if (IS_ERR(task))
8002 return PTR_ERR(task);
8003
8004 argp = task->tk_msg.rpc_argp;
8005 resp = task->tk_msg.rpc_resp;
8006 status = task->tk_status;
8007 if (status != 0)
8008 goto out;
8009
8010 status = nfs4_check_cl_exchange_flags(resp->flags);
8011 if (status != 0)
8012 goto out;
8013
8014 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
8015 if (status != 0)
8016 goto out;
8017
8018 clp->cl_clientid = resp->clientid;
8019 clp->cl_exchange_flags = resp->flags;
8020 clp->cl_seqid = resp->seqid;
8021 /* Client ID is not confirmed */
8022 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
8023 clear_bit(NFS4_SESSION_ESTABLISHED,
8024 &clp->cl_session->session_state);
8025
8026 if (clp->cl_serverscope != NULL &&
8027 !nfs41_same_server_scope(clp->cl_serverscope,
8028 resp->server_scope)) {
8029 dprintk("%s: server_scope mismatch detected\n",
8030 __func__);
8031 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
8032 }
8033
8034 swap(clp->cl_serverowner, resp->server_owner);
8035 swap(clp->cl_serverscope, resp->server_scope);
8036 swap(clp->cl_implid, resp->impl_id);
8037
8038 /* Save the EXCHANGE_ID verifier session trunk tests */
8039 memcpy(clp->cl_confirm.data, argp->verifier.data,
8040 sizeof(clp->cl_confirm.data));
8041 out:
8042 trace_nfs4_exchange_id(clp, status);
8043 rpc_put_task(task);
8044 return status;
8045 }
8046
8047 /*
8048 * nfs4_proc_exchange_id()
8049 *
8050 * Returns zero, a negative errno, or a negative NFS4ERR status code.
8051 *
8052 * Since the clientid has expired, all compounds using sessions
8053 * associated with the stale clientid will be returning
8054 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
8055 * be in some phase of session reset.
8056 *
8057 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
8058 */
8059 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
8060 {
8061 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
8062 int status;
8063
8064 /* try SP4_MACH_CRED if krb5i/p */
8065 if (authflavor == RPC_AUTH_GSS_KRB5I ||
8066 authflavor == RPC_AUTH_GSS_KRB5P) {
8067 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
8068 if (!status)
8069 return 0;
8070 }
8071
8072 /* try SP4_NONE */
8073 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
8074 }
8075
8076 /**
8077 * nfs4_test_session_trunk
8078 *
8079 * This is an add_xprt_test() test function called from
8080 * rpc_clnt_setup_test_and_add_xprt.
8081 *
8082 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
8083 * and is dereferrenced in nfs4_exchange_id_release
8084 *
8085 * Upon success, add the new transport to the rpc_clnt
8086 *
8087 * @clnt: struct rpc_clnt to get new transport
8088 * @xprt: the rpc_xprt to test
8089 * @data: call data for _nfs4_proc_exchange_id.
8090 */
8091 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
8092 void *data)
8093 {
8094 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
8095 struct rpc_task *task;
8096 int status;
8097
8098 u32 sp4_how;
8099
8100 dprintk("--> %s try %s\n", __func__,
8101 xprt->address_strings[RPC_DISPLAY_ADDR]);
8102
8103 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
8104
8105 /* Test connection for session trunking. Async exchange_id call */
8106 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
8107 if (IS_ERR(task))
8108 return PTR_ERR(task);
8109
8110 status = task->tk_status;
8111 if (status == 0)
8112 status = nfs4_detect_session_trunking(adata->clp,
8113 task->tk_msg.rpc_resp, xprt);
8114
8115 rpc_put_task(task);
8116 return status;
8117 }
8118 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
8119
8120 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
8121 struct rpc_cred *cred)
8122 {
8123 struct rpc_message msg = {
8124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
8125 .rpc_argp = clp,
8126 .rpc_cred = cred,
8127 };
8128 int status;
8129
8130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8131 trace_nfs4_destroy_clientid(clp, status);
8132 if (status)
8133 dprintk("NFS: Got error %d from the server %s on "
8134 "DESTROY_CLIENTID.", status, clp->cl_hostname);
8135 return status;
8136 }
8137
8138 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
8139 struct rpc_cred *cred)
8140 {
8141 unsigned int loop;
8142 int ret;
8143
8144 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
8145 ret = _nfs4_proc_destroy_clientid(clp, cred);
8146 switch (ret) {
8147 case -NFS4ERR_DELAY:
8148 case -NFS4ERR_CLIENTID_BUSY:
8149 ssleep(1);
8150 break;
8151 default:
8152 return ret;
8153 }
8154 }
8155 return 0;
8156 }
8157
8158 int nfs4_destroy_clientid(struct nfs_client *clp)
8159 {
8160 struct rpc_cred *cred;
8161 int ret = 0;
8162
8163 if (clp->cl_mvops->minor_version < 1)
8164 goto out;
8165 if (clp->cl_exchange_flags == 0)
8166 goto out;
8167 if (clp->cl_preserve_clid)
8168 goto out;
8169 cred = nfs4_get_clid_cred(clp);
8170 ret = nfs4_proc_destroy_clientid(clp, cred);
8171 if (cred)
8172 put_rpccred(cred);
8173 switch (ret) {
8174 case 0:
8175 case -NFS4ERR_STALE_CLIENTID:
8176 clp->cl_exchange_flags = 0;
8177 }
8178 out:
8179 return ret;
8180 }
8181
8182 struct nfs4_get_lease_time_data {
8183 struct nfs4_get_lease_time_args *args;
8184 struct nfs4_get_lease_time_res *res;
8185 struct nfs_client *clp;
8186 };
8187
8188 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
8189 void *calldata)
8190 {
8191 struct nfs4_get_lease_time_data *data =
8192 (struct nfs4_get_lease_time_data *)calldata;
8193
8194 dprintk("--> %s\n", __func__);
8195 /* just setup sequence, do not trigger session recovery
8196 since we're invoked within one */
8197 nfs4_setup_sequence(data->clp,
8198 &data->args->la_seq_args,
8199 &data->res->lr_seq_res,
8200 task);
8201 dprintk("<-- %s\n", __func__);
8202 }
8203
8204 /*
8205 * Called from nfs4_state_manager thread for session setup, so don't recover
8206 * from sequence operation or clientid errors.
8207 */
8208 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
8209 {
8210 struct nfs4_get_lease_time_data *data =
8211 (struct nfs4_get_lease_time_data *)calldata;
8212
8213 dprintk("--> %s\n", __func__);
8214 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
8215 return;
8216 switch (task->tk_status) {
8217 case -NFS4ERR_DELAY:
8218 case -NFS4ERR_GRACE:
8219 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
8220 rpc_delay(task, NFS4_POLL_RETRY_MIN);
8221 task->tk_status = 0;
8222 /* fall through */
8223 case -NFS4ERR_RETRY_UNCACHED_REP:
8224 rpc_restart_call_prepare(task);
8225 return;
8226 }
8227 dprintk("<-- %s\n", __func__);
8228 }
8229
8230 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
8231 .rpc_call_prepare = nfs4_get_lease_time_prepare,
8232 .rpc_call_done = nfs4_get_lease_time_done,
8233 };
8234
8235 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
8236 {
8237 struct rpc_task *task;
8238 struct nfs4_get_lease_time_args args;
8239 struct nfs4_get_lease_time_res res = {
8240 .lr_fsinfo = fsinfo,
8241 };
8242 struct nfs4_get_lease_time_data data = {
8243 .args = &args,
8244 .res = &res,
8245 .clp = clp,
8246 };
8247 struct rpc_message msg = {
8248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
8249 .rpc_argp = &args,
8250 .rpc_resp = &res,
8251 };
8252 struct rpc_task_setup task_setup = {
8253 .rpc_client = clp->cl_rpcclient,
8254 .rpc_message = &msg,
8255 .callback_ops = &nfs4_get_lease_time_ops,
8256 .callback_data = &data,
8257 .flags = RPC_TASK_TIMEOUT,
8258 };
8259 int status;
8260
8261 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1);
8262 task = rpc_run_task(&task_setup);
8263
8264 if (IS_ERR(task))
8265 return PTR_ERR(task);
8266
8267 status = task->tk_status;
8268 rpc_put_task(task);
8269 return status;
8270 }
8271
8272 /*
8273 * Initialize the values to be used by the client in CREATE_SESSION
8274 * If nfs4_init_session set the fore channel request and response sizes,
8275 * use them.
8276 *
8277 * Set the back channel max_resp_sz_cached to zero to force the client to
8278 * always set csa_cachethis to FALSE because the current implementation
8279 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8280 */
8281 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8282 struct rpc_clnt *clnt)
8283 {
8284 unsigned int max_rqst_sz, max_resp_sz;
8285 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
8286
8287 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8288 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
8289
8290 /* Fore channel attributes */
8291 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8292 args->fc_attrs.max_resp_sz = max_resp_sz;
8293 args->fc_attrs.max_ops = NFS4_MAX_OPS;
8294 args->fc_attrs.max_reqs = max_session_slots;
8295
8296 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8297 "max_ops=%u max_reqs=%u\n",
8298 __func__,
8299 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8300 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
8301
8302 /* Back channel attributes */
8303 args->bc_attrs.max_rqst_sz = max_bc_payload;
8304 args->bc_attrs.max_resp_sz = max_bc_payload;
8305 args->bc_attrs.max_resp_sz_cached = 0;
8306 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
8307 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1);
8308
8309 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8310 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8311 __func__,
8312 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8313 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8314 args->bc_attrs.max_reqs);
8315 }
8316
8317 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8318 struct nfs41_create_session_res *res)
8319 {
8320 struct nfs4_channel_attrs *sent = &args->fc_attrs;
8321 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
8322
8323 if (rcvd->max_resp_sz > sent->max_resp_sz)
8324 return -EINVAL;
8325 /*
8326 * Our requested max_ops is the minimum we need; we're not
8327 * prepared to break up compounds into smaller pieces than that.
8328 * So, no point even trying to continue if the server won't
8329 * cooperate:
8330 */
8331 if (rcvd->max_ops < sent->max_ops)
8332 return -EINVAL;
8333 if (rcvd->max_reqs == 0)
8334 return -EINVAL;
8335 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8336 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
8337 return 0;
8338 }
8339
8340 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8341 struct nfs41_create_session_res *res)
8342 {
8343 struct nfs4_channel_attrs *sent = &args->bc_attrs;
8344 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8345
8346 if (!(res->flags & SESSION4_BACK_CHAN))
8347 goto out;
8348 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8349 return -EINVAL;
8350 if (rcvd->max_resp_sz < sent->max_resp_sz)
8351 return -EINVAL;
8352 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8353 return -EINVAL;
8354 if (rcvd->max_ops > sent->max_ops)
8355 return -EINVAL;
8356 if (rcvd->max_reqs > sent->max_reqs)
8357 return -EINVAL;
8358 out:
8359 return 0;
8360 }
8361
8362 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8363 struct nfs41_create_session_res *res)
8364 {
8365 int ret;
8366
8367 ret = nfs4_verify_fore_channel_attrs(args, res);
8368 if (ret)
8369 return ret;
8370 return nfs4_verify_back_channel_attrs(args, res);
8371 }
8372
8373 static void nfs4_update_session(struct nfs4_session *session,
8374 struct nfs41_create_session_res *res)
8375 {
8376 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8377 /* Mark client id and session as being confirmed */
8378 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8379 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8380 session->flags = res->flags;
8381 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8382 if (res->flags & SESSION4_BACK_CHAN)
8383 memcpy(&session->bc_attrs, &res->bc_attrs,
8384 sizeof(session->bc_attrs));
8385 }
8386
8387 static int _nfs4_proc_create_session(struct nfs_client *clp,
8388 struct rpc_cred *cred)
8389 {
8390 struct nfs4_session *session = clp->cl_session;
8391 struct nfs41_create_session_args args = {
8392 .client = clp,
8393 .clientid = clp->cl_clientid,
8394 .seqid = clp->cl_seqid,
8395 .cb_program = NFS4_CALLBACK,
8396 };
8397 struct nfs41_create_session_res res;
8398
8399 struct rpc_message msg = {
8400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8401 .rpc_argp = &args,
8402 .rpc_resp = &res,
8403 .rpc_cred = cred,
8404 };
8405 int status;
8406
8407 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8408 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8409
8410 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8411 trace_nfs4_create_session(clp, status);
8412
8413 switch (status) {
8414 case -NFS4ERR_STALE_CLIENTID:
8415 case -NFS4ERR_DELAY:
8416 case -ETIMEDOUT:
8417 case -EACCES:
8418 case -EAGAIN:
8419 goto out;
8420 };
8421
8422 clp->cl_seqid++;
8423 if (!status) {
8424 /* Verify the session's negotiated channel_attrs values */
8425 status = nfs4_verify_channel_attrs(&args, &res);
8426 /* Increment the clientid slot sequence id */
8427 if (status)
8428 goto out;
8429 nfs4_update_session(session, &res);
8430 }
8431 out:
8432 return status;
8433 }
8434
8435 /*
8436 * Issues a CREATE_SESSION operation to the server.
8437 * It is the responsibility of the caller to verify the session is
8438 * expired before calling this routine.
8439 */
8440 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
8441 {
8442 int status;
8443 unsigned *ptr;
8444 struct nfs4_session *session = clp->cl_session;
8445
8446 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8447
8448 status = _nfs4_proc_create_session(clp, cred);
8449 if (status)
8450 goto out;
8451
8452 /* Init or reset the session slot tables */
8453 status = nfs4_setup_session_slot_tables(session);
8454 dprintk("slot table setup returned %d\n", status);
8455 if (status)
8456 goto out;
8457
8458 ptr = (unsigned *)&session->sess_id.data[0];
8459 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8460 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
8461 out:
8462 dprintk("<-- %s\n", __func__);
8463 return status;
8464 }
8465
8466 /*
8467 * Issue the over-the-wire RPC DESTROY_SESSION.
8468 * The caller must serialize access to this routine.
8469 */
8470 int nfs4_proc_destroy_session(struct nfs4_session *session,
8471 struct rpc_cred *cred)
8472 {
8473 struct rpc_message msg = {
8474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8475 .rpc_argp = session,
8476 .rpc_cred = cred,
8477 };
8478 int status = 0;
8479
8480 dprintk("--> nfs4_proc_destroy_session\n");
8481
8482 /* session is still being setup */
8483 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8484 return 0;
8485
8486 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8487 trace_nfs4_destroy_session(session->clp, status);
8488
8489 if (status)
8490 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8491 "Session has been destroyed regardless...\n", status);
8492
8493 dprintk("<-- nfs4_proc_destroy_session\n");
8494 return status;
8495 }
8496
8497 /*
8498 * Renew the cl_session lease.
8499 */
8500 struct nfs4_sequence_data {
8501 struct nfs_client *clp;
8502 struct nfs4_sequence_args args;
8503 struct nfs4_sequence_res res;
8504 };
8505
8506 static void nfs41_sequence_release(void *data)
8507 {
8508 struct nfs4_sequence_data *calldata = data;
8509 struct nfs_client *clp = calldata->clp;
8510
8511 if (refcount_read(&clp->cl_count) > 1)
8512 nfs4_schedule_state_renewal(clp);
8513 nfs_put_client(clp);
8514 kfree(calldata);
8515 }
8516
8517 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8518 {
8519 switch(task->tk_status) {
8520 case -NFS4ERR_DELAY:
8521 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8522 return -EAGAIN;
8523 default:
8524 nfs4_schedule_lease_recovery(clp);
8525 }
8526 return 0;
8527 }
8528
8529 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8530 {
8531 struct nfs4_sequence_data *calldata = data;
8532 struct nfs_client *clp = calldata->clp;
8533
8534 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8535 return;
8536
8537 trace_nfs4_sequence(clp, task->tk_status);
8538 if (task->tk_status < 0) {
8539 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8540 if (refcount_read(&clp->cl_count) == 1)
8541 goto out;
8542
8543 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8544 rpc_restart_call_prepare(task);
8545 return;
8546 }
8547 }
8548 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8549 out:
8550 dprintk("<-- %s\n", __func__);
8551 }
8552
8553 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8554 {
8555 struct nfs4_sequence_data *calldata = data;
8556 struct nfs_client *clp = calldata->clp;
8557 struct nfs4_sequence_args *args;
8558 struct nfs4_sequence_res *res;
8559
8560 args = task->tk_msg.rpc_argp;
8561 res = task->tk_msg.rpc_resp;
8562
8563 nfs4_setup_sequence(clp, args, res, task);
8564 }
8565
8566 static const struct rpc_call_ops nfs41_sequence_ops = {
8567 .rpc_call_done = nfs41_sequence_call_done,
8568 .rpc_call_prepare = nfs41_sequence_prepare,
8569 .rpc_release = nfs41_sequence_release,
8570 };
8571
8572 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8573 struct rpc_cred *cred,
8574 struct nfs4_slot *slot,
8575 bool is_privileged)
8576 {
8577 struct nfs4_sequence_data *calldata;
8578 struct rpc_message msg = {
8579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8580 .rpc_cred = cred,
8581 };
8582 struct rpc_task_setup task_setup_data = {
8583 .rpc_client = clp->cl_rpcclient,
8584 .rpc_message = &msg,
8585 .callback_ops = &nfs41_sequence_ops,
8586 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8587 };
8588 struct rpc_task *ret;
8589
8590 ret = ERR_PTR(-EIO);
8591 if (!refcount_inc_not_zero(&clp->cl_count))
8592 goto out_err;
8593
8594 ret = ERR_PTR(-ENOMEM);
8595 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8596 if (calldata == NULL)
8597 goto out_put_clp;
8598 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged);
8599 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
8600 msg.rpc_argp = &calldata->args;
8601 msg.rpc_resp = &calldata->res;
8602 calldata->clp = clp;
8603 task_setup_data.callback_data = calldata;
8604
8605 ret = rpc_run_task(&task_setup_data);
8606 if (IS_ERR(ret))
8607 goto out_err;
8608 return ret;
8609 out_put_clp:
8610 nfs_put_client(clp);
8611 out_err:
8612 nfs41_release_slot(slot);
8613 return ret;
8614 }
8615
8616 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8617 {
8618 struct rpc_task *task;
8619 int ret = 0;
8620
8621 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8622 return -EAGAIN;
8623 task = _nfs41_proc_sequence(clp, cred, NULL, false);
8624 if (IS_ERR(task))
8625 ret = PTR_ERR(task);
8626 else
8627 rpc_put_task_async(task);
8628 dprintk("<-- %s status=%d\n", __func__, ret);
8629 return ret;
8630 }
8631
8632 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8633 {
8634 struct rpc_task *task;
8635 int ret;
8636
8637 task = _nfs41_proc_sequence(clp, cred, NULL, true);
8638 if (IS_ERR(task)) {
8639 ret = PTR_ERR(task);
8640 goto out;
8641 }
8642 ret = rpc_wait_for_completion_task(task);
8643 if (!ret)
8644 ret = task->tk_status;
8645 rpc_put_task(task);
8646 out:
8647 dprintk("<-- %s status=%d\n", __func__, ret);
8648 return ret;
8649 }
8650
8651 struct nfs4_reclaim_complete_data {
8652 struct nfs_client *clp;
8653 struct nfs41_reclaim_complete_args arg;
8654 struct nfs41_reclaim_complete_res res;
8655 };
8656
8657 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8658 {
8659 struct nfs4_reclaim_complete_data *calldata = data;
8660
8661 nfs4_setup_sequence(calldata->clp,
8662 &calldata->arg.seq_args,
8663 &calldata->res.seq_res,
8664 task);
8665 }
8666
8667 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8668 {
8669 switch(task->tk_status) {
8670 case 0:
8671 wake_up_all(&clp->cl_lock_waitq);
8672 /* Fallthrough */
8673 case -NFS4ERR_COMPLETE_ALREADY:
8674 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8675 break;
8676 case -NFS4ERR_DELAY:
8677 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8678 /* fall through */
8679 case -NFS4ERR_RETRY_UNCACHED_REP:
8680 return -EAGAIN;
8681 case -NFS4ERR_BADSESSION:
8682 case -NFS4ERR_DEADSESSION:
8683 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8684 nfs4_schedule_session_recovery(clp->cl_session,
8685 task->tk_status);
8686 break;
8687 default:
8688 nfs4_schedule_lease_recovery(clp);
8689 }
8690 return 0;
8691 }
8692
8693 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8694 {
8695 struct nfs4_reclaim_complete_data *calldata = data;
8696 struct nfs_client *clp = calldata->clp;
8697 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8698
8699 dprintk("--> %s\n", __func__);
8700 if (!nfs41_sequence_done(task, res))
8701 return;
8702
8703 trace_nfs4_reclaim_complete(clp, task->tk_status);
8704 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8705 rpc_restart_call_prepare(task);
8706 return;
8707 }
8708 dprintk("<-- %s\n", __func__);
8709 }
8710
8711 static void nfs4_free_reclaim_complete_data(void *data)
8712 {
8713 struct nfs4_reclaim_complete_data *calldata = data;
8714
8715 kfree(calldata);
8716 }
8717
8718 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8719 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8720 .rpc_call_done = nfs4_reclaim_complete_done,
8721 .rpc_release = nfs4_free_reclaim_complete_data,
8722 };
8723
8724 /*
8725 * Issue a global reclaim complete.
8726 */
8727 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8728 struct rpc_cred *cred)
8729 {
8730 struct nfs4_reclaim_complete_data *calldata;
8731 struct rpc_task *task;
8732 struct rpc_message msg = {
8733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8734 .rpc_cred = cred,
8735 };
8736 struct rpc_task_setup task_setup_data = {
8737 .rpc_client = clp->cl_rpcclient,
8738 .rpc_message = &msg,
8739 .callback_ops = &nfs4_reclaim_complete_call_ops,
8740 .flags = RPC_TASK_ASYNC,
8741 };
8742 int status = -ENOMEM;
8743
8744 dprintk("--> %s\n", __func__);
8745 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8746 if (calldata == NULL)
8747 goto out;
8748 calldata->clp = clp;
8749 calldata->arg.one_fs = 0;
8750
8751 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1);
8752 msg.rpc_argp = &calldata->arg;
8753 msg.rpc_resp = &calldata->res;
8754 task_setup_data.callback_data = calldata;
8755 task = rpc_run_task(&task_setup_data);
8756 if (IS_ERR(task)) {
8757 status = PTR_ERR(task);
8758 goto out;
8759 }
8760 status = rpc_wait_for_completion_task(task);
8761 if (status == 0)
8762 status = task->tk_status;
8763 rpc_put_task(task);
8764 out:
8765 dprintk("<-- %s status=%d\n", __func__, status);
8766 return status;
8767 }
8768
8769 static void
8770 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8771 {
8772 struct nfs4_layoutget *lgp = calldata;
8773 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8774
8775 dprintk("--> %s\n", __func__);
8776 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8777 &lgp->res.seq_res, task);
8778 dprintk("<-- %s\n", __func__);
8779 }
8780
8781 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8782 {
8783 struct nfs4_layoutget *lgp = calldata;
8784
8785 dprintk("--> %s\n", __func__);
8786 nfs41_sequence_process(task, &lgp->res.seq_res);
8787 dprintk("<-- %s\n", __func__);
8788 }
8789
8790 static int
8791 nfs4_layoutget_handle_exception(struct rpc_task *task,
8792 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8793 {
8794 struct inode *inode = lgp->args.inode;
8795 struct nfs_server *server = NFS_SERVER(inode);
8796 struct pnfs_layout_hdr *lo;
8797 int nfs4err = task->tk_status;
8798 int err, status = 0;
8799 LIST_HEAD(head);
8800
8801 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8802
8803 nfs4_sequence_free_slot(&lgp->res.seq_res);
8804
8805 switch (nfs4err) {
8806 case 0:
8807 goto out;
8808
8809 /*
8810 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8811 * on the file. set tk_status to -ENODATA to tell upper layer to
8812 * retry go inband.
8813 */
8814 case -NFS4ERR_LAYOUTUNAVAILABLE:
8815 status = -ENODATA;
8816 goto out;
8817 /*
8818 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8819 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8820 */
8821 case -NFS4ERR_BADLAYOUT:
8822 status = -EOVERFLOW;
8823 goto out;
8824 /*
8825 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8826 * (or clients) writing to the same RAID stripe except when
8827 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8828 *
8829 * Treat it like we would RECALLCONFLICT -- we retry for a little
8830 * while, and then eventually give up.
8831 */
8832 case -NFS4ERR_LAYOUTTRYLATER:
8833 if (lgp->args.minlength == 0) {
8834 status = -EOVERFLOW;
8835 goto out;
8836 }
8837 status = -EBUSY;
8838 break;
8839 case -NFS4ERR_RECALLCONFLICT:
8840 status = -ERECALLCONFLICT;
8841 break;
8842 case -NFS4ERR_DELEG_REVOKED:
8843 case -NFS4ERR_ADMIN_REVOKED:
8844 case -NFS4ERR_EXPIRED:
8845 case -NFS4ERR_BAD_STATEID:
8846 exception->timeout = 0;
8847 spin_lock(&inode->i_lock);
8848 lo = NFS_I(inode)->layout;
8849 /* If the open stateid was bad, then recover it. */
8850 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8851 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
8852 spin_unlock(&inode->i_lock);
8853 exception->state = lgp->args.ctx->state;
8854 exception->stateid = &lgp->args.stateid;
8855 break;
8856 }
8857
8858 /*
8859 * Mark the bad layout state as invalid, then retry
8860 */
8861 pnfs_mark_layout_stateid_invalid(lo, &head);
8862 spin_unlock(&inode->i_lock);
8863 nfs_commit_inode(inode, 0);
8864 pnfs_free_lseg_list(&head);
8865 status = -EAGAIN;
8866 goto out;
8867 }
8868
8869 err = nfs4_handle_exception(server, nfs4err, exception);
8870 if (!status) {
8871 if (exception->retry)
8872 status = -EAGAIN;
8873 else
8874 status = err;
8875 }
8876 out:
8877 dprintk("<-- %s\n", __func__);
8878 return status;
8879 }
8880
8881 size_t max_response_pages(struct nfs_server *server)
8882 {
8883 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8884 return nfs_page_array_len(0, max_resp_sz);
8885 }
8886
8887 static void nfs4_layoutget_release(void *calldata)
8888 {
8889 struct nfs4_layoutget *lgp = calldata;
8890
8891 dprintk("--> %s\n", __func__);
8892 nfs4_sequence_free_slot(&lgp->res.seq_res);
8893 pnfs_layoutget_free(lgp);
8894 dprintk("<-- %s\n", __func__);
8895 }
8896
8897 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8898 .rpc_call_prepare = nfs4_layoutget_prepare,
8899 .rpc_call_done = nfs4_layoutget_done,
8900 .rpc_release = nfs4_layoutget_release,
8901 };
8902
8903 struct pnfs_layout_segment *
8904 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
8905 {
8906 struct inode *inode = lgp->args.inode;
8907 struct nfs_server *server = NFS_SERVER(inode);
8908 struct rpc_task *task;
8909 struct rpc_message msg = {
8910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8911 .rpc_argp = &lgp->args,
8912 .rpc_resp = &lgp->res,
8913 .rpc_cred = lgp->cred,
8914 };
8915 struct rpc_task_setup task_setup_data = {
8916 .rpc_client = server->client,
8917 .rpc_message = &msg,
8918 .callback_ops = &nfs4_layoutget_call_ops,
8919 .callback_data = lgp,
8920 .flags = RPC_TASK_ASYNC,
8921 };
8922 struct pnfs_layout_segment *lseg = NULL;
8923 struct nfs4_exception exception = {
8924 .inode = inode,
8925 .timeout = *timeout,
8926 };
8927 int status = 0;
8928
8929 dprintk("--> %s\n", __func__);
8930
8931 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8932 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8933
8934 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0);
8935
8936 task = rpc_run_task(&task_setup_data);
8937 if (IS_ERR(task))
8938 return ERR_CAST(task);
8939 status = rpc_wait_for_completion_task(task);
8940 if (status != 0)
8941 goto out;
8942
8943 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8944 if (task->tk_status < 0 || lgp->res.layoutp->len == 0) {
8945 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8946 *timeout = exception.timeout;
8947 } else
8948 lseg = pnfs_layout_process(lgp);
8949 out:
8950 trace_nfs4_layoutget(lgp->args.ctx,
8951 &lgp->args.range,
8952 &lgp->res.range,
8953 &lgp->res.stateid,
8954 status);
8955
8956 rpc_put_task(task);
8957 dprintk("<-- %s status=%d\n", __func__, status);
8958 if (status)
8959 return ERR_PTR(status);
8960 return lseg;
8961 }
8962
8963 static void
8964 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8965 {
8966 struct nfs4_layoutreturn *lrp = calldata;
8967
8968 dprintk("--> %s\n", __func__);
8969 nfs4_setup_sequence(lrp->clp,
8970 &lrp->args.seq_args,
8971 &lrp->res.seq_res,
8972 task);
8973 if (!pnfs_layout_is_valid(lrp->args.layout))
8974 rpc_exit(task, 0);
8975 }
8976
8977 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8978 {
8979 struct nfs4_layoutreturn *lrp = calldata;
8980 struct nfs_server *server;
8981
8982 dprintk("--> %s\n", __func__);
8983
8984 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8985 return;
8986
8987 server = NFS_SERVER(lrp->args.inode);
8988 switch (task->tk_status) {
8989 case -NFS4ERR_OLD_STATEID:
8990 if (nfs4_layoutreturn_refresh_stateid(&lrp->args.stateid,
8991 &lrp->args.range,
8992 lrp->args.inode))
8993 goto out_restart;
8994 /* Fallthrough */
8995 default:
8996 task->tk_status = 0;
8997 /* Fallthrough */
8998 case 0:
8999 break;
9000 case -NFS4ERR_DELAY:
9001 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
9002 break;
9003 goto out_restart;
9004 }
9005 dprintk("<-- %s\n", __func__);
9006 return;
9007 out_restart:
9008 task->tk_status = 0;
9009 nfs4_sequence_free_slot(&lrp->res.seq_res);
9010 rpc_restart_call_prepare(task);
9011 }
9012
9013 static void nfs4_layoutreturn_release(void *calldata)
9014 {
9015 struct nfs4_layoutreturn *lrp = calldata;
9016 struct pnfs_layout_hdr *lo = lrp->args.layout;
9017
9018 dprintk("--> %s\n", __func__);
9019 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
9020 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
9021 nfs4_sequence_free_slot(&lrp->res.seq_res);
9022 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
9023 lrp->ld_private.ops->free(&lrp->ld_private);
9024 pnfs_put_layout_hdr(lrp->args.layout);
9025 nfs_iput_and_deactive(lrp->inode);
9026 kfree(calldata);
9027 dprintk("<-- %s\n", __func__);
9028 }
9029
9030 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
9031 .rpc_call_prepare = nfs4_layoutreturn_prepare,
9032 .rpc_call_done = nfs4_layoutreturn_done,
9033 .rpc_release = nfs4_layoutreturn_release,
9034 };
9035
9036 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
9037 {
9038 struct rpc_task *task;
9039 struct rpc_message msg = {
9040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
9041 .rpc_argp = &lrp->args,
9042 .rpc_resp = &lrp->res,
9043 .rpc_cred = lrp->cred,
9044 };
9045 struct rpc_task_setup task_setup_data = {
9046 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
9047 .rpc_message = &msg,
9048 .callback_ops = &nfs4_layoutreturn_call_ops,
9049 .callback_data = lrp,
9050 };
9051 int status = 0;
9052
9053 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
9054 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
9055 &task_setup_data.rpc_client, &msg);
9056
9057 dprintk("--> %s\n", __func__);
9058 if (!sync) {
9059 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
9060 if (!lrp->inode) {
9061 nfs4_layoutreturn_release(lrp);
9062 return -EAGAIN;
9063 }
9064 task_setup_data.flags |= RPC_TASK_ASYNC;
9065 }
9066 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 0);
9067 task = rpc_run_task(&task_setup_data);
9068 if (IS_ERR(task))
9069 return PTR_ERR(task);
9070 if (sync)
9071 status = task->tk_status;
9072 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
9073 dprintk("<-- %s status=%d\n", __func__, status);
9074 rpc_put_task(task);
9075 return status;
9076 }
9077
9078 static int
9079 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
9080 struct pnfs_device *pdev,
9081 struct rpc_cred *cred)
9082 {
9083 struct nfs4_getdeviceinfo_args args = {
9084 .pdev = pdev,
9085 .notify_types = NOTIFY_DEVICEID4_CHANGE |
9086 NOTIFY_DEVICEID4_DELETE,
9087 };
9088 struct nfs4_getdeviceinfo_res res = {
9089 .pdev = pdev,
9090 };
9091 struct rpc_message msg = {
9092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
9093 .rpc_argp = &args,
9094 .rpc_resp = &res,
9095 .rpc_cred = cred,
9096 };
9097 int status;
9098
9099 dprintk("--> %s\n", __func__);
9100 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
9101 if (res.notification & ~args.notify_types)
9102 dprintk("%s: unsupported notification\n", __func__);
9103 if (res.notification != args.notify_types)
9104 pdev->nocache = 1;
9105
9106 dprintk("<-- %s status=%d\n", __func__, status);
9107
9108 return status;
9109 }
9110
9111 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
9112 struct pnfs_device *pdev,
9113 struct rpc_cred *cred)
9114 {
9115 struct nfs4_exception exception = { };
9116 int err;
9117
9118 do {
9119 err = nfs4_handle_exception(server,
9120 _nfs4_proc_getdeviceinfo(server, pdev, cred),
9121 &exception);
9122 } while (exception.retry);
9123 return err;
9124 }
9125 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
9126
9127 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
9128 {
9129 struct nfs4_layoutcommit_data *data = calldata;
9130 struct nfs_server *server = NFS_SERVER(data->args.inode);
9131
9132 nfs4_setup_sequence(server->nfs_client,
9133 &data->args.seq_args,
9134 &data->res.seq_res,
9135 task);
9136 }
9137
9138 static void
9139 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
9140 {
9141 struct nfs4_layoutcommit_data *data = calldata;
9142 struct nfs_server *server = NFS_SERVER(data->args.inode);
9143
9144 if (!nfs41_sequence_done(task, &data->res.seq_res))
9145 return;
9146
9147 switch (task->tk_status) { /* Just ignore these failures */
9148 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
9149 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
9150 case -NFS4ERR_BADLAYOUT: /* no layout */
9151 case -NFS4ERR_GRACE: /* loca_recalim always false */
9152 task->tk_status = 0;
9153 case 0:
9154 break;
9155 default:
9156 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
9157 rpc_restart_call_prepare(task);
9158 return;
9159 }
9160 }
9161 }
9162
9163 static void nfs4_layoutcommit_release(void *calldata)
9164 {
9165 struct nfs4_layoutcommit_data *data = calldata;
9166
9167 pnfs_cleanup_layoutcommit(data);
9168 nfs_post_op_update_inode_force_wcc(data->args.inode,
9169 data->res.fattr);
9170 put_rpccred(data->cred);
9171 nfs_iput_and_deactive(data->inode);
9172 kfree(data);
9173 }
9174
9175 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
9176 .rpc_call_prepare = nfs4_layoutcommit_prepare,
9177 .rpc_call_done = nfs4_layoutcommit_done,
9178 .rpc_release = nfs4_layoutcommit_release,
9179 };
9180
9181 int
9182 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
9183 {
9184 struct rpc_message msg = {
9185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
9186 .rpc_argp = &data->args,
9187 .rpc_resp = &data->res,
9188 .rpc_cred = data->cred,
9189 };
9190 struct rpc_task_setup task_setup_data = {
9191 .task = &data->task,
9192 .rpc_client = NFS_CLIENT(data->args.inode),
9193 .rpc_message = &msg,
9194 .callback_ops = &nfs4_layoutcommit_ops,
9195 .callback_data = data,
9196 };
9197 struct rpc_task *task;
9198 int status = 0;
9199
9200 dprintk("NFS: initiating layoutcommit call. sync %d "
9201 "lbw: %llu inode %lu\n", sync,
9202 data->args.lastbytewritten,
9203 data->args.inode->i_ino);
9204
9205 if (!sync) {
9206 data->inode = nfs_igrab_and_active(data->args.inode);
9207 if (data->inode == NULL) {
9208 nfs4_layoutcommit_release(data);
9209 return -EAGAIN;
9210 }
9211 task_setup_data.flags = RPC_TASK_ASYNC;
9212 }
9213 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0);
9214 task = rpc_run_task(&task_setup_data);
9215 if (IS_ERR(task))
9216 return PTR_ERR(task);
9217 if (sync)
9218 status = task->tk_status;
9219 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
9220 dprintk("%s: status %d\n", __func__, status);
9221 rpc_put_task(task);
9222 return status;
9223 }
9224
9225 /**
9226 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9227 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9228 */
9229 static int
9230 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9231 struct nfs_fsinfo *info,
9232 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
9233 {
9234 struct nfs41_secinfo_no_name_args args = {
9235 .style = SECINFO_STYLE_CURRENT_FH,
9236 };
9237 struct nfs4_secinfo_res res = {
9238 .flavors = flavors,
9239 };
9240 struct rpc_message msg = {
9241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9242 .rpc_argp = &args,
9243 .rpc_resp = &res,
9244 };
9245 struct rpc_clnt *clnt = server->client;
9246 struct rpc_cred *cred = NULL;
9247 int status;
9248
9249 if (use_integrity) {
9250 clnt = server->nfs_client->cl_rpcclient;
9251 cred = nfs4_get_clid_cred(server->nfs_client);
9252 msg.rpc_cred = cred;
9253 }
9254
9255 dprintk("--> %s\n", __func__);
9256 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
9257 &res.seq_res, 0);
9258 dprintk("<-- %s status=%d\n", __func__, status);
9259
9260 if (cred)
9261 put_rpccred(cred);
9262
9263 return status;
9264 }
9265
9266 static int
9267 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9268 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9269 {
9270 struct nfs4_exception exception = { };
9271 int err;
9272 do {
9273 /* first try using integrity protection */
9274 err = -NFS4ERR_WRONGSEC;
9275
9276 /* try to use integrity protection with machine cred */
9277 if (_nfs4_is_integrity_protected(server->nfs_client))
9278 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9279 flavors, true);
9280
9281 /*
9282 * if unable to use integrity protection, or SECINFO with
9283 * integrity protection returns NFS4ERR_WRONGSEC (which is
9284 * disallowed by spec, but exists in deployed servers) use
9285 * the current filesystem's rpc_client and the user cred.
9286 */
9287 if (err == -NFS4ERR_WRONGSEC)
9288 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9289 flavors, false);
9290
9291 switch (err) {
9292 case 0:
9293 case -NFS4ERR_WRONGSEC:
9294 case -ENOTSUPP:
9295 goto out;
9296 default:
9297 err = nfs4_handle_exception(server, err, &exception);
9298 }
9299 } while (exception.retry);
9300 out:
9301 return err;
9302 }
9303
9304 static int
9305 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9306 struct nfs_fsinfo *info)
9307 {
9308 int err;
9309 struct page *page;
9310 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
9311 struct nfs4_secinfo_flavors *flavors;
9312 struct nfs4_secinfo4 *secinfo;
9313 int i;
9314
9315 page = alloc_page(GFP_KERNEL);
9316 if (!page) {
9317 err = -ENOMEM;
9318 goto out;
9319 }
9320
9321 flavors = page_address(page);
9322 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9323
9324 /*
9325 * Fall back on "guess and check" method if
9326 * the server doesn't support SECINFO_NO_NAME
9327 */
9328 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
9329 err = nfs4_find_root_sec(server, fhandle, info);
9330 goto out_freepage;
9331 }
9332 if (err)
9333 goto out_freepage;
9334
9335 for (i = 0; i < flavors->num_flavors; i++) {
9336 secinfo = &flavors->flavors[i];
9337
9338 switch (secinfo->flavor) {
9339 case RPC_AUTH_NULL:
9340 case RPC_AUTH_UNIX:
9341 case RPC_AUTH_GSS:
9342 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9343 &secinfo->flavor_info);
9344 break;
9345 default:
9346 flavor = RPC_AUTH_MAXFLAVOR;
9347 break;
9348 }
9349
9350 if (!nfs_auth_info_match(&server->auth_info, flavor))
9351 flavor = RPC_AUTH_MAXFLAVOR;
9352
9353 if (flavor != RPC_AUTH_MAXFLAVOR) {
9354 err = nfs4_lookup_root_sec(server, fhandle,
9355 info, flavor);
9356 if (!err)
9357 break;
9358 }
9359 }
9360
9361 if (flavor == RPC_AUTH_MAXFLAVOR)
9362 err = -EPERM;
9363
9364 out_freepage:
9365 put_page(page);
9366 if (err == -EACCES)
9367 return -EPERM;
9368 out:
9369 return err;
9370 }
9371
9372 static int _nfs41_test_stateid(struct nfs_server *server,
9373 nfs4_stateid *stateid,
9374 struct rpc_cred *cred)
9375 {
9376 int status;
9377 struct nfs41_test_stateid_args args = {
9378 .stateid = stateid,
9379 };
9380 struct nfs41_test_stateid_res res;
9381 struct rpc_message msg = {
9382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9383 .rpc_argp = &args,
9384 .rpc_resp = &res,
9385 .rpc_cred = cred,
9386 };
9387 struct rpc_clnt *rpc_client = server->client;
9388
9389 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9390 &rpc_client, &msg);
9391
9392 dprintk("NFS call test_stateid %p\n", stateid);
9393 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1);
9394 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9395 &args.seq_args, &res.seq_res);
9396 if (status != NFS_OK) {
9397 dprintk("NFS reply test_stateid: failed, %d\n", status);
9398 return status;
9399 }
9400 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9401 return -res.status;
9402 }
9403
9404 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9405 int err, struct nfs4_exception *exception)
9406 {
9407 exception->retry = 0;
9408 switch(err) {
9409 case -NFS4ERR_DELAY:
9410 case -NFS4ERR_RETRY_UNCACHED_REP:
9411 nfs4_handle_exception(server, err, exception);
9412 break;
9413 case -NFS4ERR_BADSESSION:
9414 case -NFS4ERR_BADSLOT:
9415 case -NFS4ERR_BAD_HIGH_SLOT:
9416 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9417 case -NFS4ERR_DEADSESSION:
9418 nfs4_do_handle_exception(server, err, exception);
9419 }
9420 }
9421
9422 /**
9423 * nfs41_test_stateid - perform a TEST_STATEID operation
9424 *
9425 * @server: server / transport on which to perform the operation
9426 * @stateid: state ID to test
9427 * @cred: credential
9428 *
9429 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9430 * Otherwise a negative NFS4ERR value is returned if the operation
9431 * failed or the state ID is not currently valid.
9432 */
9433 static int nfs41_test_stateid(struct nfs_server *server,
9434 nfs4_stateid *stateid,
9435 struct rpc_cred *cred)
9436 {
9437 struct nfs4_exception exception = { };
9438 int err;
9439 do {
9440 err = _nfs41_test_stateid(server, stateid, cred);
9441 nfs4_handle_delay_or_session_error(server, err, &exception);
9442 } while (exception.retry);
9443 return err;
9444 }
9445
9446 struct nfs_free_stateid_data {
9447 struct nfs_server *server;
9448 struct nfs41_free_stateid_args args;
9449 struct nfs41_free_stateid_res res;
9450 };
9451
9452 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9453 {
9454 struct nfs_free_stateid_data *data = calldata;
9455 nfs4_setup_sequence(data->server->nfs_client,
9456 &data->args.seq_args,
9457 &data->res.seq_res,
9458 task);
9459 }
9460
9461 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9462 {
9463 struct nfs_free_stateid_data *data = calldata;
9464
9465 nfs41_sequence_done(task, &data->res.seq_res);
9466
9467 switch (task->tk_status) {
9468 case -NFS4ERR_DELAY:
9469 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9470 rpc_restart_call_prepare(task);
9471 }
9472 }
9473
9474 static void nfs41_free_stateid_release(void *calldata)
9475 {
9476 kfree(calldata);
9477 }
9478
9479 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9480 .rpc_call_prepare = nfs41_free_stateid_prepare,
9481 .rpc_call_done = nfs41_free_stateid_done,
9482 .rpc_release = nfs41_free_stateid_release,
9483 };
9484
9485 /**
9486 * nfs41_free_stateid - perform a FREE_STATEID operation
9487 *
9488 * @server: server / transport on which to perform the operation
9489 * @stateid: state ID to release
9490 * @cred: credential
9491 * @is_recovery: set to true if this call needs to be privileged
9492 *
9493 * Note: this function is always asynchronous.
9494 */
9495 static int nfs41_free_stateid(struct nfs_server *server,
9496 const nfs4_stateid *stateid,
9497 struct rpc_cred *cred,
9498 bool privileged)
9499 {
9500 struct rpc_message msg = {
9501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9502 .rpc_cred = cred,
9503 };
9504 struct rpc_task_setup task_setup = {
9505 .rpc_client = server->client,
9506 .rpc_message = &msg,
9507 .callback_ops = &nfs41_free_stateid_ops,
9508 .flags = RPC_TASK_ASYNC,
9509 };
9510 struct nfs_free_stateid_data *data;
9511 struct rpc_task *task;
9512
9513 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9514 &task_setup.rpc_client, &msg);
9515
9516 dprintk("NFS call free_stateid %p\n", stateid);
9517 data = kmalloc(sizeof(*data), GFP_NOFS);
9518 if (!data)
9519 return -ENOMEM;
9520 data->server = server;
9521 nfs4_stateid_copy(&data->args.stateid, stateid);
9522
9523 task_setup.callback_data = data;
9524
9525 msg.rpc_argp = &data->args;
9526 msg.rpc_resp = &data->res;
9527 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged);
9528 task = rpc_run_task(&task_setup);
9529 if (IS_ERR(task))
9530 return PTR_ERR(task);
9531 rpc_put_task(task);
9532 return 0;
9533 }
9534
9535 static void
9536 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9537 {
9538 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9539
9540 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9541 nfs4_free_lock_state(server, lsp);
9542 }
9543
9544 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9545 const nfs4_stateid *s2)
9546 {
9547 if (s1->type != s2->type)
9548 return false;
9549
9550 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9551 return false;
9552
9553 if (s1->seqid == s2->seqid)
9554 return true;
9555
9556 return s1->seqid == 0 || s2->seqid == 0;
9557 }
9558
9559 #endif /* CONFIG_NFS_V4_1 */
9560
9561 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9562 const nfs4_stateid *s2)
9563 {
9564 return nfs4_stateid_match(s1, s2);
9565 }
9566
9567
9568 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9569 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9570 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9571 .recover_open = nfs4_open_reclaim,
9572 .recover_lock = nfs4_lock_reclaim,
9573 .establish_clid = nfs4_init_clientid,
9574 .detect_trunking = nfs40_discover_server_trunking,
9575 };
9576
9577 #if defined(CONFIG_NFS_V4_1)
9578 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9579 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9580 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9581 .recover_open = nfs4_open_reclaim,
9582 .recover_lock = nfs4_lock_reclaim,
9583 .establish_clid = nfs41_init_clientid,
9584 .reclaim_complete = nfs41_proc_reclaim_complete,
9585 .detect_trunking = nfs41_discover_server_trunking,
9586 };
9587 #endif /* CONFIG_NFS_V4_1 */
9588
9589 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9590 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9591 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9592 .recover_open = nfs40_open_expired,
9593 .recover_lock = nfs4_lock_expired,
9594 .establish_clid = nfs4_init_clientid,
9595 };
9596
9597 #if defined(CONFIG_NFS_V4_1)
9598 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9599 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9600 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9601 .recover_open = nfs41_open_expired,
9602 .recover_lock = nfs41_lock_expired,
9603 .establish_clid = nfs41_init_clientid,
9604 };
9605 #endif /* CONFIG_NFS_V4_1 */
9606
9607 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9608 .sched_state_renewal = nfs4_proc_async_renew,
9609 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9610 .renew_lease = nfs4_proc_renew,
9611 };
9612
9613 #if defined(CONFIG_NFS_V4_1)
9614 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9615 .sched_state_renewal = nfs41_proc_async_sequence,
9616 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9617 .renew_lease = nfs4_proc_sequence,
9618 };
9619 #endif
9620
9621 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9622 .get_locations = _nfs40_proc_get_locations,
9623 .fsid_present = _nfs40_proc_fsid_present,
9624 };
9625
9626 #if defined(CONFIG_NFS_V4_1)
9627 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9628 .get_locations = _nfs41_proc_get_locations,
9629 .fsid_present = _nfs41_proc_fsid_present,
9630 };
9631 #endif /* CONFIG_NFS_V4_1 */
9632
9633 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9634 .minor_version = 0,
9635 .init_caps = NFS_CAP_READDIRPLUS
9636 | NFS_CAP_ATOMIC_OPEN
9637 | NFS_CAP_POSIX_LOCK,
9638 .init_client = nfs40_init_client,
9639 .shutdown_client = nfs40_shutdown_client,
9640 .match_stateid = nfs4_match_stateid,
9641 .find_root_sec = nfs4_find_root_sec,
9642 .free_lock_state = nfs4_release_lockowner,
9643 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9644 .alloc_seqid = nfs_alloc_seqid,
9645 .call_sync_ops = &nfs40_call_sync_ops,
9646 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9647 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9648 .state_renewal_ops = &nfs40_state_renewal_ops,
9649 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9650 };
9651
9652 #if defined(CONFIG_NFS_V4_1)
9653 static struct nfs_seqid *
9654 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9655 {
9656 return NULL;
9657 }
9658
9659 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9660 .minor_version = 1,
9661 .init_caps = NFS_CAP_READDIRPLUS
9662 | NFS_CAP_ATOMIC_OPEN
9663 | NFS_CAP_POSIX_LOCK
9664 | NFS_CAP_STATEID_NFSV41
9665 | NFS_CAP_ATOMIC_OPEN_V1
9666 | NFS_CAP_LGOPEN,
9667 .init_client = nfs41_init_client,
9668 .shutdown_client = nfs41_shutdown_client,
9669 .match_stateid = nfs41_match_stateid,
9670 .find_root_sec = nfs41_find_root_sec,
9671 .free_lock_state = nfs41_free_lock_state,
9672 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9673 .alloc_seqid = nfs_alloc_no_seqid,
9674 .session_trunk = nfs4_test_session_trunk,
9675 .call_sync_ops = &nfs41_call_sync_ops,
9676 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9677 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9678 .state_renewal_ops = &nfs41_state_renewal_ops,
9679 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9680 };
9681 #endif
9682
9683 #if defined(CONFIG_NFS_V4_2)
9684 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9685 .minor_version = 2,
9686 .init_caps = NFS_CAP_READDIRPLUS
9687 | NFS_CAP_ATOMIC_OPEN
9688 | NFS_CAP_POSIX_LOCK
9689 | NFS_CAP_STATEID_NFSV41
9690 | NFS_CAP_ATOMIC_OPEN_V1
9691 | NFS_CAP_LGOPEN
9692 | NFS_CAP_ALLOCATE
9693 | NFS_CAP_COPY
9694 | NFS_CAP_OFFLOAD_CANCEL
9695 | NFS_CAP_DEALLOCATE
9696 | NFS_CAP_SEEK
9697 | NFS_CAP_LAYOUTSTATS
9698 | NFS_CAP_CLONE,
9699 .init_client = nfs41_init_client,
9700 .shutdown_client = nfs41_shutdown_client,
9701 .match_stateid = nfs41_match_stateid,
9702 .find_root_sec = nfs41_find_root_sec,
9703 .free_lock_state = nfs41_free_lock_state,
9704 .call_sync_ops = &nfs41_call_sync_ops,
9705 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9706 .alloc_seqid = nfs_alloc_no_seqid,
9707 .session_trunk = nfs4_test_session_trunk,
9708 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9709 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9710 .state_renewal_ops = &nfs41_state_renewal_ops,
9711 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9712 };
9713 #endif
9714
9715 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9716 [0] = &nfs_v4_0_minor_ops,
9717 #if defined(CONFIG_NFS_V4_1)
9718 [1] = &nfs_v4_1_minor_ops,
9719 #endif
9720 #if defined(CONFIG_NFS_V4_2)
9721 [2] = &nfs_v4_2_minor_ops,
9722 #endif
9723 };
9724
9725 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9726 {
9727 ssize_t error, error2;
9728
9729 error = generic_listxattr(dentry, list, size);
9730 if (error < 0)
9731 return error;
9732 if (list) {
9733 list += error;
9734 size -= error;
9735 }
9736
9737 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9738 if (error2 < 0)
9739 return error2;
9740 return error + error2;
9741 }
9742
9743 static const struct inode_operations nfs4_dir_inode_operations = {
9744 .create = nfs_create,
9745 .lookup = nfs_lookup,
9746 .atomic_open = nfs_atomic_open,
9747 .link = nfs_link,
9748 .unlink = nfs_unlink,
9749 .symlink = nfs_symlink,
9750 .mkdir = nfs_mkdir,
9751 .rmdir = nfs_rmdir,
9752 .mknod = nfs_mknod,
9753 .rename = nfs_rename,
9754 .permission = nfs_permission,
9755 .getattr = nfs_getattr,
9756 .setattr = nfs_setattr,
9757 .listxattr = nfs4_listxattr,
9758 };
9759
9760 static const struct inode_operations nfs4_file_inode_operations = {
9761 .permission = nfs_permission,
9762 .getattr = nfs_getattr,
9763 .setattr = nfs_setattr,
9764 .listxattr = nfs4_listxattr,
9765 };
9766
9767 const struct nfs_rpc_ops nfs_v4_clientops = {
9768 .version = 4, /* protocol version */
9769 .dentry_ops = &nfs4_dentry_operations,
9770 .dir_inode_ops = &nfs4_dir_inode_operations,
9771 .file_inode_ops = &nfs4_file_inode_operations,
9772 .file_ops = &nfs4_file_operations,
9773 .getroot = nfs4_proc_get_root,
9774 .submount = nfs4_submount,
9775 .try_mount = nfs4_try_mount,
9776 .getattr = nfs4_proc_getattr,
9777 .setattr = nfs4_proc_setattr,
9778 .lookup = nfs4_proc_lookup,
9779 .lookupp = nfs4_proc_lookupp,
9780 .access = nfs4_proc_access,
9781 .readlink = nfs4_proc_readlink,
9782 .create = nfs4_proc_create,
9783 .remove = nfs4_proc_remove,
9784 .unlink_setup = nfs4_proc_unlink_setup,
9785 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9786 .unlink_done = nfs4_proc_unlink_done,
9787 .rename_setup = nfs4_proc_rename_setup,
9788 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9789 .rename_done = nfs4_proc_rename_done,
9790 .link = nfs4_proc_link,
9791 .symlink = nfs4_proc_symlink,
9792 .mkdir = nfs4_proc_mkdir,
9793 .rmdir = nfs4_proc_rmdir,
9794 .readdir = nfs4_proc_readdir,
9795 .mknod = nfs4_proc_mknod,
9796 .statfs = nfs4_proc_statfs,
9797 .fsinfo = nfs4_proc_fsinfo,
9798 .pathconf = nfs4_proc_pathconf,
9799 .set_capabilities = nfs4_server_capabilities,
9800 .decode_dirent = nfs4_decode_dirent,
9801 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9802 .read_setup = nfs4_proc_read_setup,
9803 .read_done = nfs4_read_done,
9804 .write_setup = nfs4_proc_write_setup,
9805 .write_done = nfs4_write_done,
9806 .commit_setup = nfs4_proc_commit_setup,
9807 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9808 .commit_done = nfs4_commit_done,
9809 .lock = nfs4_proc_lock,
9810 .clear_acl_cache = nfs4_zap_acl_attr,
9811 .close_context = nfs4_close_context,
9812 .open_context = nfs4_atomic_open,
9813 .have_delegation = nfs4_have_delegation,
9814 .alloc_client = nfs4_alloc_client,
9815 .init_client = nfs4_init_client,
9816 .free_client = nfs4_free_client,
9817 .create_server = nfs4_create_server,
9818 .clone_server = nfs_clone_server,
9819 };
9820
9821 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9822 .name = XATTR_NAME_NFSV4_ACL,
9823 .list = nfs4_xattr_list_nfs4_acl,
9824 .get = nfs4_xattr_get_nfs4_acl,
9825 .set = nfs4_xattr_set_nfs4_acl,
9826 };
9827
9828 const struct xattr_handler *nfs4_xattr_handlers[] = {
9829 &nfs4_xattr_nfs4_acl_handler,
9830 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9831 &nfs4_xattr_nfs4_label_handler,
9832 #endif
9833 NULL
9834 };
9835
9836 /*
9837 * Local variables:
9838 * c-basic-offset: 8
9839 * End:
9840 */
Linux with added FPC-III support