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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / fs / nfsd / nfs4xdr.c
blob04ad9a2ca3d04b08cf0f11757526163928a0c0fe
1 /*
2 * Server-side XDR for NFSv4
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
41 */
42
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
49
50 #include "idmap.h"
51 #include "acl.h"
52 #include "xdr4.h"
53 #include "vfs.h"
54 #include "state.h"
55 #include "cache.h"
56
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
58
59 /*
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
63 */
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
66
67 static __be32
68 check_filename(char *str, int len, __be32 err)
69 {
70 int i;
71
72 if (len == 0)
73 return nfserr_inval;
74 if (isdotent(str, len))
75 return err;
76 for (i = 0; i < len; i++)
77 if (str[i] == '/')
78 return err;
79 return 0;
80 }
81
82 #define DECODE_HEAD \
83 __be32 *p; \
84 __be32 status
85 #define DECODE_TAIL \
86 status = 0; \
87 out: \
88 return status; \
89 xdr_error: \
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
93 goto out
94
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
98 (x) |= ntohl(*p++); \
99 } while (0)
100 #define READTIME(x) do { \
101 p++; \
102 (x) = ntohl(*p++); \
103 p++; \
104 } while (0)
105 #define READMEM(x,nbytes) do { \
106 x = (char *)p; \
107 p += XDR_QUADLEN(nbytes); \
108 } while (0)
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
112 (char *)p)) { \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
115 goto xdr_error; \
116 } \
117 p += XDR_QUADLEN(nbytes); \
118 } while (0)
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
122 } while (0)
123
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
127 p = argp->p; \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
132 goto xdr_error; \
133 } \
134 } while (0)
135
136 static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
137 {
138 savep->p = argp->p;
139 savep->end = argp->end;
140 savep->pagelen = argp->pagelen;
141 savep->pagelist = argp->pagelist;
142 }
143
144 static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
145 {
146 argp->p = savep->p;
147 argp->end = savep->end;
148 argp->pagelen = savep->pagelen;
149 argp->pagelist = savep->pagelist;
150 }
151
152 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
153 {
154 /* We want more bytes than seem to be available.
155 * Maybe we need a new page, maybe we have just run out
156 */
157 unsigned int avail = (char *)argp->end - (char *)argp->p;
158 __be32 *p;
159 if (avail + argp->pagelen < nbytes)
160 return NULL;
161 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
162 return NULL;
163 /* ok, we can do it with the current plus the next page */
164 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmp;
166 else {
167 kfree(argp->tmpp);
168 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 if (!p)
170 return NULL;
171
172 }
173 /*
174 * The following memcpy is safe because read_buf is always
175 * called with nbytes > avail, and the two cases above both
176 * guarantee p points to at least nbytes bytes.
177 */
178 memcpy(p, argp->p, avail);
179 /* step to next page */
180 argp->p = page_address(argp->pagelist[0]);
181 argp->pagelist++;
182 if (argp->pagelen < PAGE_SIZE) {
183 argp->end = argp->p + (argp->pagelen>>2);
184 argp->pagelen = 0;
185 } else {
186 argp->end = argp->p + (PAGE_SIZE>>2);
187 argp->pagelen -= PAGE_SIZE;
188 }
189 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
190 argp->p += XDR_QUADLEN(nbytes - avail);
191 return p;
192 }
193
194 static int zero_clientid(clientid_t *clid)
195 {
196 return (clid->cl_boot == 0) && (clid->cl_id == 0);
197 }
198
199 static int
200 defer_free(struct nfsd4_compoundargs *argp,
201 void (*release)(const void *), void *p)
202 {
203 struct tmpbuf *tb;
204
205 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 if (!tb)
207 return -ENOMEM;
208 tb->buf = p;
209 tb->release = release;
210 tb->next = argp->to_free;
211 argp->to_free = tb;
212 return 0;
213 }
214
215 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
216 {
217 if (p == argp->tmp) {
218 p = kmalloc(nbytes, GFP_KERNEL);
219 if (!p)
220 return NULL;
221 memcpy(p, argp->tmp, nbytes);
222 } else {
223 BUG_ON(p != argp->tmpp);
224 argp->tmpp = NULL;
225 }
226 if (defer_free(argp, kfree, p)) {
227 kfree(p);
228 return NULL;
229 } else
230 return (char *)p;
231 }
232
233 static __be32
234 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235 {
236 u32 bmlen;
237 DECODE_HEAD;
238
239 bmval[0] = 0;
240 bmval[1] = 0;
241 bmval[2] = 0;
242
243 READ_BUF(4);
244 READ32(bmlen);
245 if (bmlen > 1000)
246 goto xdr_error;
247
248 READ_BUF(bmlen << 2);
249 if (bmlen > 0)
250 READ32(bmval[0]);
251 if (bmlen > 1)
252 READ32(bmval[1]);
253 if (bmlen > 2)
254 READ32(bmval[2]);
255
256 DECODE_TAIL;
257 }
258
259 static __be32
260 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
261 struct iattr *iattr, struct nfs4_acl **acl)
262 {
263 int expected_len, len = 0;
264 u32 dummy32;
265 char *buf;
266 int host_err;
267
268 DECODE_HEAD;
269 iattr->ia_valid = 0;
270 if ((status = nfsd4_decode_bitmap(argp, bmval)))
271 return status;
272
273 READ_BUF(4);
274 READ32(expected_len);
275
276 if (bmval[0] & FATTR4_WORD0_SIZE) {
277 READ_BUF(8);
278 len += 8;
279 READ64(iattr->ia_size);
280 iattr->ia_valid |= ATTR_SIZE;
281 }
282 if (bmval[0] & FATTR4_WORD0_ACL) {
283 int nace;
284 struct nfs4_ace *ace;
285
286 READ_BUF(4); len += 4;
287 READ32(nace);
288
289 if (nace > NFS4_ACL_MAX)
290 return nfserr_resource;
291
292 *acl = nfs4_acl_new(nace);
293 if (*acl == NULL) {
294 host_err = -ENOMEM;
295 goto out_nfserr;
296 }
297 defer_free(argp, kfree, *acl);
298
299 (*acl)->naces = nace;
300 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
301 READ_BUF(16); len += 16;
302 READ32(ace->type);
303 READ32(ace->flag);
304 READ32(ace->access_mask);
305 READ32(dummy32);
306 READ_BUF(dummy32);
307 len += XDR_QUADLEN(dummy32) << 2;
308 READMEM(buf, dummy32);
309 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 status = nfs_ok;
311 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 ace->who = 0;
313 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
314 status = nfsd_map_name_to_gid(argp->rqstp,
315 buf, dummy32, &ace->who);
316 else
317 status = nfsd_map_name_to_uid(argp->rqstp,
318 buf, dummy32, &ace->who);
319 if (status)
320 return status;
321 }
322 } else
323 *acl = NULL;
324 if (bmval[1] & FATTR4_WORD1_MODE) {
325 READ_BUF(4);
326 len += 4;
327 READ32(iattr->ia_mode);
328 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
329 iattr->ia_valid |= ATTR_MODE;
330 }
331 if (bmval[1] & FATTR4_WORD1_OWNER) {
332 READ_BUF(4);
333 len += 4;
334 READ32(dummy32);
335 READ_BUF(dummy32);
336 len += (XDR_QUADLEN(dummy32) << 2);
337 READMEM(buf, dummy32);
338 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 return status;
340 iattr->ia_valid |= ATTR_UID;
341 }
342 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
343 READ_BUF(4);
344 len += 4;
345 READ32(dummy32);
346 READ_BUF(dummy32);
347 len += (XDR_QUADLEN(dummy32) << 2);
348 READMEM(buf, dummy32);
349 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 return status;
351 iattr->ia_valid |= ATTR_GID;
352 }
353 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
354 READ_BUF(4);
355 len += 4;
356 READ32(dummy32);
357 switch (dummy32) {
358 case NFS4_SET_TO_CLIENT_TIME:
359 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
360 all 32 bits of 'nseconds'. */
361 READ_BUF(12);
362 len += 12;
363 READ32(dummy32);
364 if (dummy32)
365 return nfserr_inval;
366 READ32(iattr->ia_atime.tv_sec);
367 READ32(iattr->ia_atime.tv_nsec);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 return nfserr_inval;
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 break;
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
374 break;
375 default:
376 goto xdr_error;
377 }
378 }
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
380 READ_BUF(4);
381 len += 4;
382 READ32(dummy32);
383 switch (dummy32) {
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
387 READ_BUF(12);
388 len += 12;
389 READ32(dummy32);
390 if (dummy32)
391 return nfserr_inval;
392 READ32(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 return nfserr_inval;
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 break;
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
400 break;
401 default:
402 goto xdr_error;
403 }
404 }
405 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
406 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
407 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
408 READ_BUF(expected_len - len);
409 else if (len != expected_len)
410 goto xdr_error;
411
412 DECODE_TAIL;
413
414 out_nfserr:
415 status = nfserrno(host_err);
416 goto out;
417 }
418
419 static __be32
420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
421 {
422 DECODE_HEAD;
423
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427
428 DECODE_TAIL;
429 }
430
431 static __be32
432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
433 {
434 DECODE_HEAD;
435
436 READ_BUF(4);
437 READ32(access->ac_req_access);
438
439 DECODE_TAIL;
440 }
441
442 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
443 {
444 DECODE_HEAD;
445
446 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
447 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
448 READ32(bcts->dir);
449 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
450 * could help us figure out we should be using it. */
451 DECODE_TAIL;
452 }
453
454 static __be32
455 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
456 {
457 DECODE_HEAD;
458
459 close->cl_stateowner = NULL;
460 READ_BUF(4);
461 READ32(close->cl_seqid);
462 return nfsd4_decode_stateid(argp, &close->cl_stateid);
463
464 DECODE_TAIL;
465 }
466
467
468 static __be32
469 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
470 {
471 DECODE_HEAD;
472
473 READ_BUF(12);
474 READ64(commit->co_offset);
475 READ32(commit->co_count);
476
477 DECODE_TAIL;
478 }
479
480 static __be32
481 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
482 {
483 DECODE_HEAD;
484
485 READ_BUF(4);
486 READ32(create->cr_type);
487 switch (create->cr_type) {
488 case NF4LNK:
489 READ_BUF(4);
490 READ32(create->cr_linklen);
491 READ_BUF(create->cr_linklen);
492 SAVEMEM(create->cr_linkname, create->cr_linklen);
493 break;
494 case NF4BLK:
495 case NF4CHR:
496 READ_BUF(8);
497 READ32(create->cr_specdata1);
498 READ32(create->cr_specdata2);
499 break;
500 case NF4SOCK:
501 case NF4FIFO:
502 case NF4DIR:
503 default:
504 break;
505 }
506
507 READ_BUF(4);
508 READ32(create->cr_namelen);
509 READ_BUF(create->cr_namelen);
510 SAVEMEM(create->cr_name, create->cr_namelen);
511 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
512 return status;
513
514 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
515 &create->cr_acl);
516 if (status)
517 goto out;
518
519 DECODE_TAIL;
520 }
521
522 static inline __be32
523 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
524 {
525 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
526 }
527
528 static inline __be32
529 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
530 {
531 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
532 }
533
534 static __be32
535 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
536 {
537 DECODE_HEAD;
538
539 READ_BUF(4);
540 READ32(link->li_namelen);
541 READ_BUF(link->li_namelen);
542 SAVEMEM(link->li_name, link->li_namelen);
543 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
544 return status;
545
546 DECODE_TAIL;
547 }
548
549 static __be32
550 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
551 {
552 DECODE_HEAD;
553
554 lock->lk_replay_owner = NULL;
555 /*
556 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
557 */
558 READ_BUF(28);
559 READ32(lock->lk_type);
560 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
561 goto xdr_error;
562 READ32(lock->lk_reclaim);
563 READ64(lock->lk_offset);
564 READ64(lock->lk_length);
565 READ32(lock->lk_is_new);
566
567 if (lock->lk_is_new) {
568 READ_BUF(4);
569 READ32(lock->lk_new_open_seqid);
570 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
571 if (status)
572 return status;
573 READ_BUF(8 + sizeof(clientid_t));
574 READ32(lock->lk_new_lock_seqid);
575 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
576 READ32(lock->lk_new_owner.len);
577 READ_BUF(lock->lk_new_owner.len);
578 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
579 } else {
580 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
581 if (status)
582 return status;
583 READ_BUF(4);
584 READ32(lock->lk_old_lock_seqid);
585 }
586
587 DECODE_TAIL;
588 }
589
590 static __be32
591 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
592 {
593 DECODE_HEAD;
594
595 READ_BUF(32);
596 READ32(lockt->lt_type);
597 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
598 goto xdr_error;
599 READ64(lockt->lt_offset);
600 READ64(lockt->lt_length);
601 COPYMEM(&lockt->lt_clientid, 8);
602 READ32(lockt->lt_owner.len);
603 READ_BUF(lockt->lt_owner.len);
604 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
605
606 DECODE_TAIL;
607 }
608
609 static __be32
610 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
611 {
612 DECODE_HEAD;
613
614 locku->lu_stateowner = NULL;
615 READ_BUF(8);
616 READ32(locku->lu_type);
617 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
618 goto xdr_error;
619 READ32(locku->lu_seqid);
620 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
621 if (status)
622 return status;
623 READ_BUF(16);
624 READ64(locku->lu_offset);
625 READ64(locku->lu_length);
626
627 DECODE_TAIL;
628 }
629
630 static __be32
631 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
632 {
633 DECODE_HEAD;
634
635 READ_BUF(4);
636 READ32(lookup->lo_len);
637 READ_BUF(lookup->lo_len);
638 SAVEMEM(lookup->lo_name, lookup->lo_len);
639 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
640 return status;
641
642 DECODE_TAIL;
643 }
644
645 static __be32
646 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
647 {
648 DECODE_HEAD;
649
650 memset(open->op_bmval, 0, sizeof(open->op_bmval));
651 open->op_iattr.ia_valid = 0;
652 open->op_stateowner = NULL;
653
654 /* seqid, share_access, share_deny, clientid, ownerlen */
655 READ_BUF(16 + sizeof(clientid_t));
656 READ32(open->op_seqid);
657 READ32(open->op_share_access);
658 READ32(open->op_share_deny);
659 COPYMEM(&open->op_clientid, sizeof(clientid_t));
660 READ32(open->op_owner.len);
661
662 /* owner, open_flag */
663 READ_BUF(open->op_owner.len + 4);
664 SAVEMEM(open->op_owner.data, open->op_owner.len);
665 READ32(open->op_create);
666 switch (open->op_create) {
667 case NFS4_OPEN_NOCREATE:
668 break;
669 case NFS4_OPEN_CREATE:
670 READ_BUF(4);
671 READ32(open->op_createmode);
672 switch (open->op_createmode) {
673 case NFS4_CREATE_UNCHECKED:
674 case NFS4_CREATE_GUARDED:
675 status = nfsd4_decode_fattr(argp, open->op_bmval,
676 &open->op_iattr, &open->op_acl);
677 if (status)
678 goto out;
679 break;
680 case NFS4_CREATE_EXCLUSIVE:
681 READ_BUF(8);
682 COPYMEM(open->op_verf.data, 8);
683 break;
684 case NFS4_CREATE_EXCLUSIVE4_1:
685 if (argp->minorversion < 1)
686 goto xdr_error;
687 READ_BUF(8);
688 COPYMEM(open->op_verf.data, 8);
689 status = nfsd4_decode_fattr(argp, open->op_bmval,
690 &open->op_iattr, &open->op_acl);
691 if (status)
692 goto out;
693 break;
694 default:
695 goto xdr_error;
696 }
697 break;
698 default:
699 goto xdr_error;
700 }
701
702 /* open_claim */
703 READ_BUF(4);
704 READ32(open->op_claim_type);
705 switch (open->op_claim_type) {
706 case NFS4_OPEN_CLAIM_NULL:
707 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
708 READ_BUF(4);
709 READ32(open->op_fname.len);
710 READ_BUF(open->op_fname.len);
711 SAVEMEM(open->op_fname.data, open->op_fname.len);
712 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
713 return status;
714 break;
715 case NFS4_OPEN_CLAIM_PREVIOUS:
716 READ_BUF(4);
717 READ32(open->op_delegate_type);
718 break;
719 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
720 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
721 if (status)
722 return status;
723 READ_BUF(4);
724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
728 return status;
729 break;
730 default:
731 goto xdr_error;
732 }
733
734 DECODE_TAIL;
735 }
736
737 static __be32
738 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
739 {
740 DECODE_HEAD;
741
742 open_conf->oc_stateowner = NULL;
743 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
744 if (status)
745 return status;
746 READ_BUF(4);
747 READ32(open_conf->oc_seqid);
748
749 DECODE_TAIL;
750 }
751
752 static __be32
753 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
754 {
755 DECODE_HEAD;
756
757 open_down->od_stateowner = NULL;
758 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
759 if (status)
760 return status;
761 READ_BUF(12);
762 READ32(open_down->od_seqid);
763 READ32(open_down->od_share_access);
764 READ32(open_down->od_share_deny);
765
766 DECODE_TAIL;
767 }
768
769 static __be32
770 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
771 {
772 DECODE_HEAD;
773
774 READ_BUF(4);
775 READ32(putfh->pf_fhlen);
776 if (putfh->pf_fhlen > NFS4_FHSIZE)
777 goto xdr_error;
778 READ_BUF(putfh->pf_fhlen);
779 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
780
781 DECODE_TAIL;
782 }
783
784 static __be32
785 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
786 {
787 DECODE_HEAD;
788
789 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
790 if (status)
791 return status;
792 READ_BUF(12);
793 READ64(read->rd_offset);
794 READ32(read->rd_length);
795
796 DECODE_TAIL;
797 }
798
799 static __be32
800 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
801 {
802 DECODE_HEAD;
803
804 READ_BUF(24);
805 READ64(readdir->rd_cookie);
806 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
807 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
808 READ32(readdir->rd_maxcount);
809 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
810 goto out;
811
812 DECODE_TAIL;
813 }
814
815 static __be32
816 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
817 {
818 DECODE_HEAD;
819
820 READ_BUF(4);
821 READ32(remove->rm_namelen);
822 READ_BUF(remove->rm_namelen);
823 SAVEMEM(remove->rm_name, remove->rm_namelen);
824 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
825 return status;
826
827 DECODE_TAIL;
828 }
829
830 static __be32
831 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
832 {
833 DECODE_HEAD;
834
835 READ_BUF(4);
836 READ32(rename->rn_snamelen);
837 READ_BUF(rename->rn_snamelen + 4);
838 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
839 READ32(rename->rn_tnamelen);
840 READ_BUF(rename->rn_tnamelen);
841 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
842 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
843 return status;
844 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
845 return status;
846
847 DECODE_TAIL;
848 }
849
850 static __be32
851 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
852 {
853 DECODE_HEAD;
854
855 READ_BUF(sizeof(clientid_t));
856 COPYMEM(clientid, sizeof(clientid_t));
857
858 DECODE_TAIL;
859 }
860
861 static __be32
862 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
863 struct nfsd4_secinfo *secinfo)
864 {
865 DECODE_HEAD;
866
867 READ_BUF(4);
868 READ32(secinfo->si_namelen);
869 READ_BUF(secinfo->si_namelen);
870 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
871 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfserr_noent);
873 if (status)
874 return status;
875 DECODE_TAIL;
876 }
877
878 static __be32
879 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
880 struct nfsd4_secinfo_no_name *sin)
881 {
882 DECODE_HEAD;
883
884 READ_BUF(4);
885 READ32(sin->sin_style);
886 DECODE_TAIL;
887 }
888
889 static __be32
890 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
891 {
892 __be32 status;
893
894 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
895 if (status)
896 return status;
897 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
898 &setattr->sa_acl);
899 }
900
901 static __be32
902 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
903 {
904 DECODE_HEAD;
905
906 READ_BUF(12);
907 COPYMEM(setclientid->se_verf.data, 8);
908 READ32(setclientid->se_namelen);
909
910 READ_BUF(setclientid->se_namelen + 8);
911 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
912 READ32(setclientid->se_callback_prog);
913 READ32(setclientid->se_callback_netid_len);
914
915 READ_BUF(setclientid->se_callback_netid_len + 4);
916 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
917 READ32(setclientid->se_callback_addr_len);
918
919 READ_BUF(setclientid->se_callback_addr_len + 4);
920 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
921 READ32(setclientid->se_callback_ident);
922
923 DECODE_TAIL;
924 }
925
926 static __be32
927 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
928 {
929 DECODE_HEAD;
930
931 READ_BUF(8 + sizeof(nfs4_verifier));
932 COPYMEM(&scd_c->sc_clientid, 8);
933 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
934
935 DECODE_TAIL;
936 }
937
938 /* Also used for NVERIFY */
939 static __be32
940 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
941 {
942 #if 0
943 struct nfsd4_compoundargs save = {
944 .p = argp->p,
945 .end = argp->end,
946 .rqstp = argp->rqstp,
947 };
948 u32 ve_bmval[2];
949 struct iattr ve_iattr; /* request */
950 struct nfs4_acl *ve_acl; /* request */
951 #endif
952 DECODE_HEAD;
953
954 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
955 goto out;
956
957 /* For convenience's sake, we compare raw xdr'd attributes in
958 * nfsd4_proc_verify; however we still decode here just to return
959 * correct error in case of bad xdr. */
960 #if 0
961 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
962 if (status == nfserr_inval) {
963 status = nfserrno(status);
964 goto out;
965 }
966 #endif
967 READ_BUF(4);
968 READ32(verify->ve_attrlen);
969 READ_BUF(verify->ve_attrlen);
970 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
971
972 DECODE_TAIL;
973 }
974
975 static __be32
976 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
977 {
978 int avail;
979 int v;
980 int len;
981 DECODE_HEAD;
982
983 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
984 if (status)
985 return status;
986 READ_BUF(16);
987 READ64(write->wr_offset);
988 READ32(write->wr_stable_how);
989 if (write->wr_stable_how > 2)
990 goto xdr_error;
991 READ32(write->wr_buflen);
992
993 /* Sorry .. no magic macros for this.. *
994 * READ_BUF(write->wr_buflen);
995 * SAVEMEM(write->wr_buf, write->wr_buflen);
996 */
997 avail = (char*)argp->end - (char*)argp->p;
998 if (avail + argp->pagelen < write->wr_buflen) {
999 dprintk("NFSD: xdr error (%s:%d)\n",
1000 __FILE__, __LINE__);
1001 goto xdr_error;
1002 }
1003 argp->rqstp->rq_vec[0].iov_base = p;
1004 argp->rqstp->rq_vec[0].iov_len = avail;
1005 v = 0;
1006 len = write->wr_buflen;
1007 while (len > argp->rqstp->rq_vec[v].iov_len) {
1008 len -= argp->rqstp->rq_vec[v].iov_len;
1009 v++;
1010 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1011 argp->pagelist++;
1012 if (argp->pagelen >= PAGE_SIZE) {
1013 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1014 argp->pagelen -= PAGE_SIZE;
1015 } else {
1016 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1017 argp->pagelen -= len;
1018 }
1019 }
1020 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1021 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1022 argp->rqstp->rq_vec[v].iov_len = len;
1023 write->wr_vlen = v+1;
1024
1025 DECODE_TAIL;
1026 }
1027
1028 static __be32
1029 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1030 {
1031 DECODE_HEAD;
1032
1033 READ_BUF(12);
1034 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1035 READ32(rlockowner->rl_owner.len);
1036 READ_BUF(rlockowner->rl_owner.len);
1037 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038
1039 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1040 return nfserr_inval;
1041 DECODE_TAIL;
1042 }
1043
1044 static __be32
1045 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1046 struct nfsd4_exchange_id *exid)
1047 {
1048 int dummy, tmp;
1049 DECODE_HEAD;
1050
1051 READ_BUF(NFS4_VERIFIER_SIZE);
1052 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1053
1054 READ_BUF(4);
1055 READ32(exid->clname.len);
1056
1057 READ_BUF(exid->clname.len);
1058 SAVEMEM(exid->clname.data, exid->clname.len);
1059
1060 READ_BUF(4);
1061 READ32(exid->flags);
1062
1063 /* Ignore state_protect4_a */
1064 READ_BUF(4);
1065 READ32(exid->spa_how);
1066 switch (exid->spa_how) {
1067 case SP4_NONE:
1068 break;
1069 case SP4_MACH_CRED:
1070 /* spo_must_enforce */
1071 READ_BUF(4);
1072 READ32(dummy);
1073 READ_BUF(dummy * 4);
1074 p += dummy;
1075
1076 /* spo_must_allow */
1077 READ_BUF(4);
1078 READ32(dummy);
1079 READ_BUF(dummy * 4);
1080 p += dummy;
1081 break;
1082 case SP4_SSV:
1083 /* ssp_ops */
1084 READ_BUF(4);
1085 READ32(dummy);
1086 READ_BUF(dummy * 4);
1087 p += dummy;
1088
1089 READ_BUF(4);
1090 READ32(dummy);
1091 READ_BUF(dummy * 4);
1092 p += dummy;
1093
1094 /* ssp_hash_algs<> */
1095 READ_BUF(4);
1096 READ32(tmp);
1097 while (tmp--) {
1098 READ_BUF(4);
1099 READ32(dummy);
1100 READ_BUF(dummy);
1101 p += XDR_QUADLEN(dummy);
1102 }
1103
1104 /* ssp_encr_algs<> */
1105 READ_BUF(4);
1106 READ32(tmp);
1107 while (tmp--) {
1108 READ_BUF(4);
1109 READ32(dummy);
1110 READ_BUF(dummy);
1111 p += XDR_QUADLEN(dummy);
1112 }
1113
1114 /* ssp_window and ssp_num_gss_handles */
1115 READ_BUF(8);
1116 READ32(dummy);
1117 READ32(dummy);
1118 break;
1119 default:
1120 goto xdr_error;
1121 }
1122
1123 /* Ignore Implementation ID */
1124 READ_BUF(4); /* nfs_impl_id4 array length */
1125 READ32(dummy);
1126
1127 if (dummy > 1)
1128 goto xdr_error;
1129
1130 if (dummy == 1) {
1131 /* nii_domain */
1132 READ_BUF(4);
1133 READ32(dummy);
1134 READ_BUF(dummy);
1135 p += XDR_QUADLEN(dummy);
1136
1137 /* nii_name */
1138 READ_BUF(4);
1139 READ32(dummy);
1140 READ_BUF(dummy);
1141 p += XDR_QUADLEN(dummy);
1142
1143 /* nii_date */
1144 READ_BUF(12);
1145 p += 3;
1146 }
1147 DECODE_TAIL;
1148 }
1149
1150 static __be32
1151 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1152 struct nfsd4_create_session *sess)
1153 {
1154 DECODE_HEAD;
1155
1156 u32 dummy;
1157 char *machine_name;
1158 int i;
1159 int nr_secflavs;
1160
1161 READ_BUF(16);
1162 COPYMEM(&sess->clientid, 8);
1163 READ32(sess->seqid);
1164 READ32(sess->flags);
1165
1166 /* Fore channel attrs */
1167 READ_BUF(28);
1168 READ32(dummy); /* headerpadsz is always 0 */
1169 READ32(sess->fore_channel.maxreq_sz);
1170 READ32(sess->fore_channel.maxresp_sz);
1171 READ32(sess->fore_channel.maxresp_cached);
1172 READ32(sess->fore_channel.maxops);
1173 READ32(sess->fore_channel.maxreqs);
1174 READ32(sess->fore_channel.nr_rdma_attrs);
1175 if (sess->fore_channel.nr_rdma_attrs == 1) {
1176 READ_BUF(4);
1177 READ32(sess->fore_channel.rdma_attrs);
1178 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1179 dprintk("Too many fore channel attr bitmaps!\n");
1180 goto xdr_error;
1181 }
1182
1183 /* Back channel attrs */
1184 READ_BUF(28);
1185 READ32(dummy); /* headerpadsz is always 0 */
1186 READ32(sess->back_channel.maxreq_sz);
1187 READ32(sess->back_channel.maxresp_sz);
1188 READ32(sess->back_channel.maxresp_cached);
1189 READ32(sess->back_channel.maxops);
1190 READ32(sess->back_channel.maxreqs);
1191 READ32(sess->back_channel.nr_rdma_attrs);
1192 if (sess->back_channel.nr_rdma_attrs == 1) {
1193 READ_BUF(4);
1194 READ32(sess->back_channel.rdma_attrs);
1195 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1196 dprintk("Too many back channel attr bitmaps!\n");
1197 goto xdr_error;
1198 }
1199
1200 READ_BUF(8);
1201 READ32(sess->callback_prog);
1202
1203 /* callback_sec_params4 */
1204 READ32(nr_secflavs);
1205 for (i = 0; i < nr_secflavs; ++i) {
1206 READ_BUF(4);
1207 READ32(dummy);
1208 switch (dummy) {
1209 case RPC_AUTH_NULL:
1210 /* Nothing to read */
1211 break;
1212 case RPC_AUTH_UNIX:
1213 READ_BUF(8);
1214 /* stamp */
1215 READ32(dummy);
1216
1217 /* machine name */
1218 READ32(dummy);
1219 READ_BUF(dummy);
1220 SAVEMEM(machine_name, dummy);
1221
1222 /* uid, gid */
1223 READ_BUF(8);
1224 READ32(sess->uid);
1225 READ32(sess->gid);
1226
1227 /* more gids */
1228 READ_BUF(4);
1229 READ32(dummy);
1230 READ_BUF(dummy * 4);
1231 break;
1232 case RPC_AUTH_GSS:
1233 dprintk("RPC_AUTH_GSS callback secflavor "
1234 "not supported!\n");
1235 READ_BUF(8);
1236 /* gcbp_service */
1237 READ32(dummy);
1238 /* gcbp_handle_from_server */
1239 READ32(dummy);
1240 READ_BUF(dummy);
1241 p += XDR_QUADLEN(dummy);
1242 /* gcbp_handle_from_client */
1243 READ_BUF(4);
1244 READ32(dummy);
1245 READ_BUF(dummy);
1246 break;
1247 default:
1248 dprintk("Illegal callback secflavor\n");
1249 return nfserr_inval;
1250 }
1251 }
1252 DECODE_TAIL;
1253 }
1254
1255 static __be32
1256 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1257 struct nfsd4_destroy_session *destroy_session)
1258 {
1259 DECODE_HEAD;
1260 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1261 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1262
1263 DECODE_TAIL;
1264 }
1265
1266 static __be32
1267 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_free_stateid *free_stateid)
1269 {
1270 DECODE_HEAD;
1271
1272 READ_BUF(sizeof(stateid_t));
1273 READ32(free_stateid->fr_stateid.si_generation);
1274 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1275
1276 DECODE_TAIL;
1277 }
1278
1279 static __be32
1280 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1281 struct nfsd4_sequence *seq)
1282 {
1283 DECODE_HEAD;
1284
1285 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1286 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1287 READ32(seq->seqid);
1288 READ32(seq->slotid);
1289 READ32(seq->maxslots);
1290 READ32(seq->cachethis);
1291
1292 DECODE_TAIL;
1293 }
1294
1295 static __be32
1296 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1297 {
1298 unsigned int nbytes;
1299 stateid_t si;
1300 int i;
1301 __be32 *p;
1302 __be32 status;
1303
1304 READ_BUF(4);
1305 test_stateid->ts_num_ids = ntohl(*p++);
1306
1307 nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
1308 if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
1309 goto xdr_error;
1310
1311 test_stateid->ts_saved_args = argp;
1312 save_buf(argp, &test_stateid->ts_savedp);
1313
1314 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1315 status = nfsd4_decode_stateid(argp, &si);
1316 if (status)
1317 return status;
1318 }
1319
1320 status = 0;
1321 out:
1322 return status;
1323 xdr_error:
1324 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1325 status = nfserr_bad_xdr;
1326 goto out;
1327 }
1328
1329 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1330 {
1331 DECODE_HEAD;
1332
1333 READ_BUF(4);
1334 READ32(rc->rca_one_fs);
1335
1336 DECODE_TAIL;
1337 }
1338
1339 static __be32
1340 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1341 {
1342 return nfs_ok;
1343 }
1344
1345 static __be32
1346 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1347 {
1348 return nfserr_notsupp;
1349 }
1350
1351 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1352
1353 static nfsd4_dec nfsd4_dec_ops[] = {
1354 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1355 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1356 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1357 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1358 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1360 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1361 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1362 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1363 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1364 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1365 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1366 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1367 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1368 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1369 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1370 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1372 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1373 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1374 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1375 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1376 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1377 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1378 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1379 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1380 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1381 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1382 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1383 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1384 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1385 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1386 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1387 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1388 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1389 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1390 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1391 };
1392
1393 static nfsd4_dec nfsd41_dec_ops[] = {
1394 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1395 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1396 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1397 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1398 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1399 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1400 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1401 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1402 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1403 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1404 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1405 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1406 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1407 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1408 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1409 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1410 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1411 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1412 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1413 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1414 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1415 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1416 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1417 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1418 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1419 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1420 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1421 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1422 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1423 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1424 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1425 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1426 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1427 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1428 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1429 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1430 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1431
1432 /* new operations for NFSv4.1 */
1433 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1434 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1435 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1436 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1437 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1438 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1439 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1440 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1441 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1442 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1443 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1444 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1445 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1446 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1447 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1448 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1449 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1450 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1451 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1452 };
1453
1454 struct nfsd4_minorversion_ops {
1455 nfsd4_dec *decoders;
1456 int nops;
1457 };
1458
1459 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1460 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1461 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1462 };
1463
1464 static __be32
1465 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1466 {
1467 DECODE_HEAD;
1468 struct nfsd4_op *op;
1469 struct nfsd4_minorversion_ops *ops;
1470 bool cachethis = false;
1471 int i;
1472
1473 /*
1474 * XXX: According to spec, we should check the tag
1475 * for UTF-8 compliance. I'm postponing this for
1476 * now because it seems that some clients do use
1477 * binary tags.
1478 */
1479 READ_BUF(4);
1480 READ32(argp->taglen);
1481 READ_BUF(argp->taglen + 8);
1482 SAVEMEM(argp->tag, argp->taglen);
1483 READ32(argp->minorversion);
1484 READ32(argp->opcnt);
1485
1486 if (argp->taglen > NFSD4_MAX_TAGLEN)
1487 goto xdr_error;
1488 if (argp->opcnt > 100)
1489 goto xdr_error;
1490
1491 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1492 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1493 if (!argp->ops) {
1494 argp->ops = argp->iops;
1495 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1496 goto xdr_error;
1497 }
1498 }
1499
1500 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1501 argp->opcnt = 0;
1502
1503 ops = &nfsd4_minorversion[argp->minorversion];
1504 for (i = 0; i < argp->opcnt; i++) {
1505 op = &argp->ops[i];
1506 op->replay = NULL;
1507
1508 /*
1509 * We can't use READ_BUF() here because we need to handle
1510 * a missing opcode as an OP_WRITE + 1. So we need to check
1511 * to see if we're truly at the end of our buffer or if there
1512 * is another page we need to flip to.
1513 */
1514
1515 if (argp->p == argp->end) {
1516 if (argp->pagelen < 4) {
1517 /* There isn't an opcode still on the wire */
1518 op->opnum = OP_WRITE + 1;
1519 op->status = nfserr_bad_xdr;
1520 argp->opcnt = i+1;
1521 break;
1522 }
1523
1524 /*
1525 * False alarm. We just hit a page boundary, but there
1526 * is still data available. Move pointer across page
1527 * boundary. *snip from READ_BUF*
1528 */
1529 argp->p = page_address(argp->pagelist[0]);
1530 argp->pagelist++;
1531 if (argp->pagelen < PAGE_SIZE) {
1532 argp->end = argp->p + (argp->pagelen>>2);
1533 argp->pagelen = 0;
1534 } else {
1535 argp->end = argp->p + (PAGE_SIZE>>2);
1536 argp->pagelen -= PAGE_SIZE;
1537 }
1538 }
1539 op->opnum = ntohl(*argp->p++);
1540
1541 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1542 op->status = ops->decoders[op->opnum](argp, &op->u);
1543 else {
1544 op->opnum = OP_ILLEGAL;
1545 op->status = nfserr_op_illegal;
1546 }
1547
1548 if (op->status) {
1549 argp->opcnt = i+1;
1550 break;
1551 }
1552 /*
1553 * We'll try to cache the result in the DRC if any one
1554 * op in the compound wants to be cached:
1555 */
1556 cachethis |= nfsd4_cache_this_op(op);
1557 }
1558 /* Sessions make the DRC unnecessary: */
1559 if (argp->minorversion)
1560 cachethis = false;
1561 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1562
1563 DECODE_TAIL;
1564 }
1565
1566 #define WRITE32(n) *p++ = htonl(n)
1567 #define WRITE64(n) do { \
1568 *p++ = htonl((u32)((n) >> 32)); \
1569 *p++ = htonl((u32)(n)); \
1570 } while (0)
1571 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1572 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1573 memcpy(p, ptr, nbytes); \
1574 p += XDR_QUADLEN(nbytes); \
1575 }} while (0)
1576
1577 static void write32(__be32 **p, u32 n)
1578 {
1579 *(*p)++ = n;
1580 }
1581
1582 static void write64(__be32 **p, u64 n)
1583 {
1584 write32(p, (u32)(n >> 32));
1585 write32(p, (u32)n);
1586 }
1587
1588 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1589 {
1590 if (IS_I_VERSION(inode)) {
1591 write64(p, inode->i_version);
1592 } else {
1593 write32(p, stat->ctime.tv_sec);
1594 write32(p, stat->ctime.tv_nsec);
1595 }
1596 }
1597
1598 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1599 {
1600 write32(p, c->atomic);
1601 if (c->change_supported) {
1602 write64(p, c->before_change);
1603 write64(p, c->after_change);
1604 } else {
1605 write32(p, c->before_ctime_sec);
1606 write32(p, c->before_ctime_nsec);
1607 write32(p, c->after_ctime_sec);
1608 write32(p, c->after_ctime_nsec);
1609 }
1610 }
1611
1612 #define RESERVE_SPACE(nbytes) do { \
1613 p = resp->p; \
1614 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1615 } while (0)
1616 #define ADJUST_ARGS() resp->p = p
1617
1618 /*
1619 * Header routine to setup seqid operation replay cache
1620 */
1621 #define ENCODE_SEQID_OP_HEAD \
1622 __be32 *save; \
1623 \
1624 save = resp->p;
1625
1626 /*
1627 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1628 * is where sequence id's are incremented, and the replay cache is filled.
1629 * Note that we increment sequence id's here, at the last moment, so we're sure
1630 * we know whether the error to be returned is a sequence id mutating error.
1631 */
1632
1633 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1634 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) { \
1635 stateowner->so_seqid++; \
1636 stateowner->so_replay.rp_status = nfserr; \
1637 stateowner->so_replay.rp_buflen = \
1638 (((char *)(resp)->p - (char *)save)); \
1639 memcpy(stateowner->so_replay.rp_buf, save, \
1640 stateowner->so_replay.rp_buflen); \
1641 } } while (0);
1642
1643 /* Encode as an array of strings the string given with components
1644 * separated @sep.
1645 */
1646 static __be32 nfsd4_encode_components(char sep, char *components,
1647 __be32 **pp, int *buflen)
1648 {
1649 __be32 *p = *pp;
1650 __be32 *countp = p;
1651 int strlen, count=0;
1652 char *str, *end;
1653
1654 dprintk("nfsd4_encode_components(%s)\n", components);
1655 if ((*buflen -= 4) < 0)
1656 return nfserr_resource;
1657 WRITE32(0); /* We will fill this in with @count later */
1658 end = str = components;
1659 while (*end) {
1660 for (; *end && (*end != sep); end++)
1661 ; /* Point to end of component */
1662 strlen = end - str;
1663 if (strlen) {
1664 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1665 return nfserr_resource;
1666 WRITE32(strlen);
1667 WRITEMEM(str, strlen);
1668 count++;
1669 }
1670 else
1671 end++;
1672 str = end;
1673 }
1674 *pp = p;
1675 p = countp;
1676 WRITE32(count);
1677 return 0;
1678 }
1679
1680 /*
1681 * encode a location element of a fs_locations structure
1682 */
1683 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1684 __be32 **pp, int *buflen)
1685 {
1686 __be32 status;
1687 __be32 *p = *pp;
1688
1689 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1690 if (status)
1691 return status;
1692 status = nfsd4_encode_components('/', location->path, &p, buflen);
1693 if (status)
1694 return status;
1695 *pp = p;
1696 return 0;
1697 }
1698
1699 /*
1700 * Return the path to an export point in the pseudo filesystem namespace
1701 * Returned string is safe to use as long as the caller holds a reference
1702 * to @exp.
1703 */
1704 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1705 {
1706 struct svc_fh tmp_fh;
1707 char *path = NULL, *rootpath;
1708 size_t rootlen;
1709
1710 fh_init(&tmp_fh, NFS4_FHSIZE);
1711 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1712 if (*stat)
1713 return NULL;
1714 rootpath = tmp_fh.fh_export->ex_pathname;
1715
1716 path = exp->ex_pathname;
1717
1718 rootlen = strlen(rootpath);
1719 if (strncmp(path, rootpath, rootlen)) {
1720 dprintk("nfsd: fs_locations failed;"
1721 "%s is not contained in %s\n", path, rootpath);
1722 *stat = nfserr_notsupp;
1723 path = NULL;
1724 goto out;
1725 }
1726 path += rootlen;
1727 out:
1728 fh_put(&tmp_fh);
1729 return path;
1730 }
1731
1732 /*
1733 * encode a fs_locations structure
1734 */
1735 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1736 struct svc_export *exp,
1737 __be32 **pp, int *buflen)
1738 {
1739 __be32 status;
1740 int i;
1741 __be32 *p = *pp;
1742 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1743 char *root = nfsd4_path(rqstp, exp, &status);
1744
1745 if (status)
1746 return status;
1747 status = nfsd4_encode_components('/', root, &p, buflen);
1748 if (status)
1749 return status;
1750 if ((*buflen -= 4) < 0)
1751 return nfserr_resource;
1752 WRITE32(fslocs->locations_count);
1753 for (i=0; i<fslocs->locations_count; i++) {
1754 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1755 &p, buflen);
1756 if (status)
1757 return status;
1758 }
1759 *pp = p;
1760 return 0;
1761 }
1762
1763 static u32 nfs4_file_type(umode_t mode)
1764 {
1765 switch (mode & S_IFMT) {
1766 case S_IFIFO: return NF4FIFO;
1767 case S_IFCHR: return NF4CHR;
1768 case S_IFDIR: return NF4DIR;
1769 case S_IFBLK: return NF4BLK;
1770 case S_IFLNK: return NF4LNK;
1771 case S_IFREG: return NF4REG;
1772 case S_IFSOCK: return NF4SOCK;
1773 default: return NF4BAD;
1774 };
1775 }
1776
1777 static __be32
1778 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1779 __be32 **p, int *buflen)
1780 {
1781 int status;
1782
1783 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1784 return nfserr_resource;
1785 if (whotype != NFS4_ACL_WHO_NAMED)
1786 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1787 else if (group)
1788 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1789 else
1790 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1791 if (status < 0)
1792 return nfserrno(status);
1793 *p = xdr_encode_opaque(*p, NULL, status);
1794 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1795 BUG_ON(*buflen < 0);
1796 return 0;
1797 }
1798
1799 static inline __be32
1800 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1801 {
1802 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1803 }
1804
1805 static inline __be32
1806 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1807 {
1808 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1809 }
1810
1811 static inline __be32
1812 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1813 __be32 **p, int *buflen)
1814 {
1815 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1816 }
1817
1818 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1819 FATTR4_WORD0_RDATTR_ERROR)
1820 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1821
1822 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1823 {
1824 /* As per referral draft: */
1825 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1826 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1827 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1828 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1829 *rdattr_err = NFSERR_MOVED;
1830 else
1831 return nfserr_moved;
1832 }
1833 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1834 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1835 return 0;
1836 }
1837
1838 /*
1839 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1840 * ourselves.
1841 *
1842 * @countp is the buffer size in _words_; upon successful return this becomes
1843 * replaced with the number of words written.
1844 */
1845 __be32
1846 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1847 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1848 struct svc_rqst *rqstp, int ignore_crossmnt)
1849 {
1850 u32 bmval0 = bmval[0];
1851 u32 bmval1 = bmval[1];
1852 u32 bmval2 = bmval[2];
1853 struct kstat stat;
1854 struct svc_fh tempfh;
1855 struct kstatfs statfs;
1856 int buflen = *countp << 2;
1857 __be32 *attrlenp;
1858 u32 dummy;
1859 u64 dummy64;
1860 u32 rdattr_err = 0;
1861 __be32 *p = buffer;
1862 __be32 status;
1863 int err;
1864 int aclsupport = 0;
1865 struct nfs4_acl *acl = NULL;
1866 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1867 u32 minorversion = resp->cstate.minorversion;
1868 struct path path = {
1869 .mnt = exp->ex_path.mnt,
1870 .dentry = dentry,
1871 };
1872
1873 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1874 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1875 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1876 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1877
1878 if (exp->ex_fslocs.migrated) {
1879 BUG_ON(bmval[2]);
1880 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1881 if (status)
1882 goto out;
1883 }
1884
1885 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1886 if (err)
1887 goto out_nfserr;
1888 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1889 FATTR4_WORD0_MAXNAME)) ||
1890 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1891 FATTR4_WORD1_SPACE_TOTAL))) {
1892 err = vfs_statfs(&path, &statfs);
1893 if (err)
1894 goto out_nfserr;
1895 }
1896 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1897 fh_init(&tempfh, NFS4_FHSIZE);
1898 status = fh_compose(&tempfh, exp, dentry, NULL);
1899 if (status)
1900 goto out;
1901 fhp = &tempfh;
1902 }
1903 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1904 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1905 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1906 aclsupport = (err == 0);
1907 if (bmval0 & FATTR4_WORD0_ACL) {
1908 if (err == -EOPNOTSUPP)
1909 bmval0 &= ~FATTR4_WORD0_ACL;
1910 else if (err == -EINVAL) {
1911 status = nfserr_attrnotsupp;
1912 goto out;
1913 } else if (err != 0)
1914 goto out_nfserr;
1915 }
1916 }
1917
1918 if (bmval2) {
1919 if ((buflen -= 16) < 0)
1920 goto out_resource;
1921 WRITE32(3);
1922 WRITE32(bmval0);
1923 WRITE32(bmval1);
1924 WRITE32(bmval2);
1925 } else if (bmval1) {
1926 if ((buflen -= 12) < 0)
1927 goto out_resource;
1928 WRITE32(2);
1929 WRITE32(bmval0);
1930 WRITE32(bmval1);
1931 } else {
1932 if ((buflen -= 8) < 0)
1933 goto out_resource;
1934 WRITE32(1);
1935 WRITE32(bmval0);
1936 }
1937 attrlenp = p++; /* to be backfilled later */
1938
1939 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1940 u32 word0 = nfsd_suppattrs0(minorversion);
1941 u32 word1 = nfsd_suppattrs1(minorversion);
1942 u32 word2 = nfsd_suppattrs2(minorversion);
1943
1944 if (!aclsupport)
1945 word0 &= ~FATTR4_WORD0_ACL;
1946 if (!word2) {
1947 if ((buflen -= 12) < 0)
1948 goto out_resource;
1949 WRITE32(2);
1950 WRITE32(word0);
1951 WRITE32(word1);
1952 } else {
1953 if ((buflen -= 16) < 0)
1954 goto out_resource;
1955 WRITE32(3);
1956 WRITE32(word0);
1957 WRITE32(word1);
1958 WRITE32(word2);
1959 }
1960 }
1961 if (bmval0 & FATTR4_WORD0_TYPE) {
1962 if ((buflen -= 4) < 0)
1963 goto out_resource;
1964 dummy = nfs4_file_type(stat.mode);
1965 if (dummy == NF4BAD)
1966 goto out_serverfault;
1967 WRITE32(dummy);
1968 }
1969 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1970 if ((buflen -= 4) < 0)
1971 goto out_resource;
1972 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1973 WRITE32(NFS4_FH_PERSISTENT);
1974 else
1975 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1976 }
1977 if (bmval0 & FATTR4_WORD0_CHANGE) {
1978 if ((buflen -= 8) < 0)
1979 goto out_resource;
1980 write_change(&p, &stat, dentry->d_inode);
1981 }
1982 if (bmval0 & FATTR4_WORD0_SIZE) {
1983 if ((buflen -= 8) < 0)
1984 goto out_resource;
1985 WRITE64(stat.size);
1986 }
1987 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1988 if ((buflen -= 4) < 0)
1989 goto out_resource;
1990 WRITE32(1);
1991 }
1992 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1993 if ((buflen -= 4) < 0)
1994 goto out_resource;
1995 WRITE32(1);
1996 }
1997 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1998 if ((buflen -= 4) < 0)
1999 goto out_resource;
2000 WRITE32(0);
2001 }
2002 if (bmval0 & FATTR4_WORD0_FSID) {
2003 if ((buflen -= 16) < 0)
2004 goto out_resource;
2005 if (exp->ex_fslocs.migrated) {
2006 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2007 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2008 } else switch(fsid_source(fhp)) {
2009 case FSIDSOURCE_FSID:
2010 WRITE64((u64)exp->ex_fsid);
2011 WRITE64((u64)0);
2012 break;
2013 case FSIDSOURCE_DEV:
2014 WRITE32(0);
2015 WRITE32(MAJOR(stat.dev));
2016 WRITE32(0);
2017 WRITE32(MINOR(stat.dev));
2018 break;
2019 case FSIDSOURCE_UUID:
2020 WRITEMEM(exp->ex_uuid, 16);
2021 break;
2022 }
2023 }
2024 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2025 if ((buflen -= 4) < 0)
2026 goto out_resource;
2027 WRITE32(0);
2028 }
2029 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2030 if ((buflen -= 4) < 0)
2031 goto out_resource;
2032 WRITE32(nfsd4_lease);
2033 }
2034 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2035 if ((buflen -= 4) < 0)
2036 goto out_resource;
2037 WRITE32(rdattr_err);
2038 }
2039 if (bmval0 & FATTR4_WORD0_ACL) {
2040 struct nfs4_ace *ace;
2041
2042 if (acl == NULL) {
2043 if ((buflen -= 4) < 0)
2044 goto out_resource;
2045
2046 WRITE32(0);
2047 goto out_acl;
2048 }
2049 if ((buflen -= 4) < 0)
2050 goto out_resource;
2051 WRITE32(acl->naces);
2052
2053 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2054 if ((buflen -= 4*3) < 0)
2055 goto out_resource;
2056 WRITE32(ace->type);
2057 WRITE32(ace->flag);
2058 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2059 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2060 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2061 &p, &buflen);
2062 if (status == nfserr_resource)
2063 goto out_resource;
2064 if (status)
2065 goto out;
2066 }
2067 }
2068 out_acl:
2069 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2070 if ((buflen -= 4) < 0)
2071 goto out_resource;
2072 WRITE32(aclsupport ?
2073 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2074 }
2075 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2076 if ((buflen -= 4) < 0)
2077 goto out_resource;
2078 WRITE32(1);
2079 }
2080 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2081 if ((buflen -= 4) < 0)
2082 goto out_resource;
2083 WRITE32(1);
2084 }
2085 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2086 if ((buflen -= 4) < 0)
2087 goto out_resource;
2088 WRITE32(1);
2089 }
2090 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2091 if ((buflen -= 4) < 0)
2092 goto out_resource;
2093 WRITE32(1);
2094 }
2095 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2096 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2097 if (buflen < 0)
2098 goto out_resource;
2099 WRITE32(fhp->fh_handle.fh_size);
2100 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2101 }
2102 if (bmval0 & FATTR4_WORD0_FILEID) {
2103 if ((buflen -= 8) < 0)
2104 goto out_resource;
2105 WRITE64(stat.ino);
2106 }
2107 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2108 if ((buflen -= 8) < 0)
2109 goto out_resource;
2110 WRITE64((u64) statfs.f_ffree);
2111 }
2112 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2113 if ((buflen -= 8) < 0)
2114 goto out_resource;
2115 WRITE64((u64) statfs.f_ffree);
2116 }
2117 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2118 if ((buflen -= 8) < 0)
2119 goto out_resource;
2120 WRITE64((u64) statfs.f_files);
2121 }
2122 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2123 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2124 if (status == nfserr_resource)
2125 goto out_resource;
2126 if (status)
2127 goto out;
2128 }
2129 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2130 if ((buflen -= 4) < 0)
2131 goto out_resource;
2132 WRITE32(1);
2133 }
2134 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2135 if ((buflen -= 8) < 0)
2136 goto out_resource;
2137 WRITE64(~(u64)0);
2138 }
2139 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2140 if ((buflen -= 4) < 0)
2141 goto out_resource;
2142 WRITE32(255);
2143 }
2144 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2145 if ((buflen -= 4) < 0)
2146 goto out_resource;
2147 WRITE32(statfs.f_namelen);
2148 }
2149 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2150 if ((buflen -= 8) < 0)
2151 goto out_resource;
2152 WRITE64((u64) svc_max_payload(rqstp));
2153 }
2154 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2155 if ((buflen -= 8) < 0)
2156 goto out_resource;
2157 WRITE64((u64) svc_max_payload(rqstp));
2158 }
2159 if (bmval1 & FATTR4_WORD1_MODE) {
2160 if ((buflen -= 4) < 0)
2161 goto out_resource;
2162 WRITE32(stat.mode & S_IALLUGO);
2163 }
2164 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2165 if ((buflen -= 4) < 0)
2166 goto out_resource;
2167 WRITE32(1);
2168 }
2169 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2170 if ((buflen -= 4) < 0)
2171 goto out_resource;
2172 WRITE32(stat.nlink);
2173 }
2174 if (bmval1 & FATTR4_WORD1_OWNER) {
2175 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2176 if (status == nfserr_resource)
2177 goto out_resource;
2178 if (status)
2179 goto out;
2180 }
2181 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2182 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2183 if (status == nfserr_resource)
2184 goto out_resource;
2185 if (status)
2186 goto out;
2187 }
2188 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2189 if ((buflen -= 8) < 0)
2190 goto out_resource;
2191 WRITE32((u32) MAJOR(stat.rdev));
2192 WRITE32((u32) MINOR(stat.rdev));
2193 }
2194 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2195 if ((buflen -= 8) < 0)
2196 goto out_resource;
2197 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2198 WRITE64(dummy64);
2199 }
2200 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2201 if ((buflen -= 8) < 0)
2202 goto out_resource;
2203 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2204 WRITE64(dummy64);
2205 }
2206 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2207 if ((buflen -= 8) < 0)
2208 goto out_resource;
2209 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2210 WRITE64(dummy64);
2211 }
2212 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2213 if ((buflen -= 8) < 0)
2214 goto out_resource;
2215 dummy64 = (u64)stat.blocks << 9;
2216 WRITE64(dummy64);
2217 }
2218 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2219 if ((buflen -= 12) < 0)
2220 goto out_resource;
2221 WRITE32(0);
2222 WRITE32(stat.atime.tv_sec);
2223 WRITE32(stat.atime.tv_nsec);
2224 }
2225 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2226 if ((buflen -= 12) < 0)
2227 goto out_resource;
2228 WRITE32(0);
2229 WRITE32(1);
2230 WRITE32(0);
2231 }
2232 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2233 if ((buflen -= 12) < 0)
2234 goto out_resource;
2235 WRITE32(0);
2236 WRITE32(stat.ctime.tv_sec);
2237 WRITE32(stat.ctime.tv_nsec);
2238 }
2239 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2240 if ((buflen -= 12) < 0)
2241 goto out_resource;
2242 WRITE32(0);
2243 WRITE32(stat.mtime.tv_sec);
2244 WRITE32(stat.mtime.tv_nsec);
2245 }
2246 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2247 if ((buflen -= 8) < 0)
2248 goto out_resource;
2249 /*
2250 * Get parent's attributes if not ignoring crossmount
2251 * and this is the root of a cross-mounted filesystem.
2252 */
2253 if (ignore_crossmnt == 0 &&
2254 dentry == exp->ex_path.mnt->mnt_root) {
2255 struct path path = exp->ex_path;
2256 path_get(&path);
2257 while (follow_up(&path)) {
2258 if (path.dentry != path.mnt->mnt_root)
2259 break;
2260 }
2261 err = vfs_getattr(path.mnt, path.dentry, &stat);
2262 path_put(&path);
2263 if (err)
2264 goto out_nfserr;
2265 }
2266 WRITE64(stat.ino);
2267 }
2268 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2269 WRITE32(3);
2270 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2271 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2272 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2273 }
2274
2275 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2276 *countp = p - buffer;
2277 status = nfs_ok;
2278
2279 out:
2280 kfree(acl);
2281 if (fhp == &tempfh)
2282 fh_put(&tempfh);
2283 return status;
2284 out_nfserr:
2285 status = nfserrno(err);
2286 goto out;
2287 out_resource:
2288 *countp = 0;
2289 status = nfserr_resource;
2290 goto out;
2291 out_serverfault:
2292 status = nfserr_serverfault;
2293 goto out;
2294 }
2295
2296 static inline int attributes_need_mount(u32 *bmval)
2297 {
2298 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2299 return 1;
2300 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2301 return 1;
2302 return 0;
2303 }
2304
2305 static __be32
2306 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2307 const char *name, int namlen, __be32 *p, int *buflen)
2308 {
2309 struct svc_export *exp = cd->rd_fhp->fh_export;
2310 struct dentry *dentry;
2311 __be32 nfserr;
2312 int ignore_crossmnt = 0;
2313
2314 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2315 if (IS_ERR(dentry))
2316 return nfserrno(PTR_ERR(dentry));
2317 if (!dentry->d_inode) {
2318 /*
2319 * nfsd_buffered_readdir drops the i_mutex between
2320 * readdir and calling this callback, leaving a window
2321 * where this directory entry could have gone away.
2322 */
2323 dput(dentry);
2324 return nfserr_noent;
2325 }
2326
2327 exp_get(exp);
2328 /*
2329 * In the case of a mountpoint, the client may be asking for
2330 * attributes that are only properties of the underlying filesystem
2331 * as opposed to the cross-mounted file system. In such a case,
2332 * we will not follow the cross mount and will fill the attribtutes
2333 * directly from the mountpoint dentry.
2334 */
2335 if (nfsd_mountpoint(dentry, exp)) {
2336 int err;
2337
2338 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2339 && !attributes_need_mount(cd->rd_bmval)) {
2340 ignore_crossmnt = 1;
2341 goto out_encode;
2342 }
2343 /*
2344 * Why the heck aren't we just using nfsd_lookup??
2345 * Different "."/".." handling? Something else?
2346 * At least, add a comment here to explain....
2347 */
2348 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2349 if (err) {
2350 nfserr = nfserrno(err);
2351 goto out_put;
2352 }
2353 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2354 if (nfserr)
2355 goto out_put;
2356
2357 }
2358 out_encode:
2359 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2360 cd->rd_rqstp, ignore_crossmnt);
2361 out_put:
2362 dput(dentry);
2363 exp_put(exp);
2364 return nfserr;
2365 }
2366
2367 static __be32 *
2368 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2369 {
2370 __be32 *attrlenp;
2371
2372 if (buflen < 6)
2373 return NULL;
2374 *p++ = htonl(2);
2375 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2376 *p++ = htonl(0); /* bmval1 */
2377
2378 attrlenp = p++;
2379 *p++ = nfserr; /* no htonl */
2380 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2381 return p;
2382 }
2383
2384 static int
2385 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2386 loff_t offset, u64 ino, unsigned int d_type)
2387 {
2388 struct readdir_cd *ccd = ccdv;
2389 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2390 int buflen;
2391 __be32 *p = cd->buffer;
2392 __be32 *cookiep;
2393 __be32 nfserr = nfserr_toosmall;
2394
2395 /* In nfsv4, "." and ".." never make it onto the wire.. */
2396 if (name && isdotent(name, namlen)) {
2397 cd->common.err = nfs_ok;
2398 return 0;
2399 }
2400
2401 if (cd->offset)
2402 xdr_encode_hyper(cd->offset, (u64) offset);
2403
2404 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2405 if (buflen < 0)
2406 goto fail;
2407
2408 *p++ = xdr_one; /* mark entry present */
2409 cookiep = p;
2410 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2411 p = xdr_encode_array(p, name, namlen); /* name length & name */
2412
2413 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2414 switch (nfserr) {
2415 case nfs_ok:
2416 p += buflen;
2417 break;
2418 case nfserr_resource:
2419 nfserr = nfserr_toosmall;
2420 goto fail;
2421 case nfserr_noent:
2422 goto skip_entry;
2423 default:
2424 /*
2425 * If the client requested the RDATTR_ERROR attribute,
2426 * we stuff the error code into this attribute
2427 * and continue. If this attribute was not requested,
2428 * then in accordance with the spec, we fail the
2429 * entire READDIR operation(!)
2430 */
2431 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2432 goto fail;
2433 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2434 if (p == NULL) {
2435 nfserr = nfserr_toosmall;
2436 goto fail;
2437 }
2438 }
2439 cd->buflen -= (p - cd->buffer);
2440 cd->buffer = p;
2441 cd->offset = cookiep;
2442 skip_entry:
2443 cd->common.err = nfs_ok;
2444 return 0;
2445 fail:
2446 cd->common.err = nfserr;
2447 return -EINVAL;
2448 }
2449
2450 static void
2451 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2452 {
2453 __be32 *p;
2454
2455 RESERVE_SPACE(sizeof(stateid_t));
2456 WRITE32(sid->si_generation);
2457 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2458 ADJUST_ARGS();
2459 }
2460
2461 static __be32
2462 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2463 {
2464 __be32 *p;
2465
2466 if (!nfserr) {
2467 RESERVE_SPACE(8);
2468 WRITE32(access->ac_supported);
2469 WRITE32(access->ac_resp_access);
2470 ADJUST_ARGS();
2471 }
2472 return nfserr;
2473 }
2474
2475 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2476 {
2477 __be32 *p;
2478
2479 if (!nfserr) {
2480 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2481 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2482 WRITE32(bcts->dir);
2483 /* XXX: ? */
2484 WRITE32(0);
2485 ADJUST_ARGS();
2486 }
2487 return nfserr;
2488 }
2489
2490 static __be32
2491 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2492 {
2493 ENCODE_SEQID_OP_HEAD;
2494
2495 if (!nfserr)
2496 nfsd4_encode_stateid(resp, &close->cl_stateid);
2497
2498 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2499 return nfserr;
2500 }
2501
2502
2503 static __be32
2504 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2505 {
2506 __be32 *p;
2507
2508 if (!nfserr) {
2509 RESERVE_SPACE(8);
2510 WRITEMEM(commit->co_verf.data, 8);
2511 ADJUST_ARGS();
2512 }
2513 return nfserr;
2514 }
2515
2516 static __be32
2517 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2518 {
2519 __be32 *p;
2520
2521 if (!nfserr) {
2522 RESERVE_SPACE(32);
2523 write_cinfo(&p, &create->cr_cinfo);
2524 WRITE32(2);
2525 WRITE32(create->cr_bmval[0]);
2526 WRITE32(create->cr_bmval[1]);
2527 ADJUST_ARGS();
2528 }
2529 return nfserr;
2530 }
2531
2532 static __be32
2533 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2534 {
2535 struct svc_fh *fhp = getattr->ga_fhp;
2536 int buflen;
2537
2538 if (nfserr)
2539 return nfserr;
2540
2541 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2542 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2543 resp->p, &buflen, getattr->ga_bmval,
2544 resp->rqstp, 0);
2545 if (!nfserr)
2546 resp->p += buflen;
2547 return nfserr;
2548 }
2549
2550 static __be32
2551 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2552 {
2553 struct svc_fh *fhp = *fhpp;
2554 unsigned int len;
2555 __be32 *p;
2556
2557 if (!nfserr) {
2558 len = fhp->fh_handle.fh_size;
2559 RESERVE_SPACE(len + 4);
2560 WRITE32(len);
2561 WRITEMEM(&fhp->fh_handle.fh_base, len);
2562 ADJUST_ARGS();
2563 }
2564 return nfserr;
2565 }
2566
2567 /*
2568 * Including all fields other than the name, a LOCK4denied structure requires
2569 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2570 */
2571 static void
2572 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2573 {
2574 __be32 *p;
2575
2576 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2577 WRITE64(ld->ld_start);
2578 WRITE64(ld->ld_length);
2579 WRITE32(ld->ld_type);
2580 if (ld->ld_sop) {
2581 WRITEMEM(&ld->ld_clientid, 8);
2582 WRITE32(ld->ld_sop->so_owner.len);
2583 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2584 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2585 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2586 WRITE64((u64)0); /* clientid */
2587 WRITE32(0); /* length of owner name */
2588 }
2589 ADJUST_ARGS();
2590 }
2591
2592 static __be32
2593 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2594 {
2595 ENCODE_SEQID_OP_HEAD;
2596
2597 if (!nfserr)
2598 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2599 else if (nfserr == nfserr_denied)
2600 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2601
2602 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2603 return nfserr;
2604 }
2605
2606 static __be32
2607 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2608 {
2609 if (nfserr == nfserr_denied)
2610 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2611 return nfserr;
2612 }
2613
2614 static __be32
2615 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2616 {
2617 ENCODE_SEQID_OP_HEAD;
2618
2619 if (!nfserr)
2620 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2621
2622 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2623 return nfserr;
2624 }
2625
2626
2627 static __be32
2628 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2629 {
2630 __be32 *p;
2631
2632 if (!nfserr) {
2633 RESERVE_SPACE(20);
2634 write_cinfo(&p, &link->li_cinfo);
2635 ADJUST_ARGS();
2636 }
2637 return nfserr;
2638 }
2639
2640
2641 static __be32
2642 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2643 {
2644 __be32 *p;
2645 ENCODE_SEQID_OP_HEAD;
2646
2647 if (nfserr)
2648 goto out;
2649
2650 nfsd4_encode_stateid(resp, &open->op_stateid);
2651 RESERVE_SPACE(40);
2652 write_cinfo(&p, &open->op_cinfo);
2653 WRITE32(open->op_rflags);
2654 WRITE32(2);
2655 WRITE32(open->op_bmval[0]);
2656 WRITE32(open->op_bmval[1]);
2657 WRITE32(open->op_delegate_type);
2658 ADJUST_ARGS();
2659
2660 switch (open->op_delegate_type) {
2661 case NFS4_OPEN_DELEGATE_NONE:
2662 break;
2663 case NFS4_OPEN_DELEGATE_READ:
2664 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2665 RESERVE_SPACE(20);
2666 WRITE32(open->op_recall);
2667
2668 /*
2669 * TODO: ACE's in delegations
2670 */
2671 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2672 WRITE32(0);
2673 WRITE32(0);
2674 WRITE32(0); /* XXX: is NULL principal ok? */
2675 ADJUST_ARGS();
2676 break;
2677 case NFS4_OPEN_DELEGATE_WRITE:
2678 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2679 RESERVE_SPACE(32);
2680 WRITE32(0);
2681
2682 /*
2683 * TODO: space_limit's in delegations
2684 */
2685 WRITE32(NFS4_LIMIT_SIZE);
2686 WRITE32(~(u32)0);
2687 WRITE32(~(u32)0);
2688
2689 /*
2690 * TODO: ACE's in delegations
2691 */
2692 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2693 WRITE32(0);
2694 WRITE32(0);
2695 WRITE32(0); /* XXX: is NULL principal ok? */
2696 ADJUST_ARGS();
2697 break;
2698 default:
2699 BUG();
2700 }
2701 /* XXX save filehandle here */
2702 out:
2703 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2704 return nfserr;
2705 }
2706
2707 static __be32
2708 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2709 {
2710 ENCODE_SEQID_OP_HEAD;
2711
2712 if (!nfserr)
2713 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2714
2715 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2716 return nfserr;
2717 }
2718
2719 static __be32
2720 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2721 {
2722 ENCODE_SEQID_OP_HEAD;
2723
2724 if (!nfserr)
2725 nfsd4_encode_stateid(resp, &od->od_stateid);
2726
2727 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2728 return nfserr;
2729 }
2730
2731 static __be32
2732 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2733 struct nfsd4_read *read)
2734 {
2735 u32 eof;
2736 int v, pn;
2737 unsigned long maxcount;
2738 long len;
2739 __be32 *p;
2740
2741 if (nfserr)
2742 return nfserr;
2743 if (resp->xbuf->page_len)
2744 return nfserr_resource;
2745
2746 RESERVE_SPACE(8); /* eof flag and byte count */
2747
2748 maxcount = svc_max_payload(resp->rqstp);
2749 if (maxcount > read->rd_length)
2750 maxcount = read->rd_length;
2751
2752 len = maxcount;
2753 v = 0;
2754 while (len > 0) {
2755 pn = resp->rqstp->rq_resused++;
2756 resp->rqstp->rq_vec[v].iov_base =
2757 page_address(resp->rqstp->rq_respages[pn]);
2758 resp->rqstp->rq_vec[v].iov_len =
2759 len < PAGE_SIZE ? len : PAGE_SIZE;
2760 v++;
2761 len -= PAGE_SIZE;
2762 }
2763 read->rd_vlen = v;
2764
2765 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2766 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2767 &maxcount);
2768
2769 if (nfserr)
2770 return nfserr;
2771 eof = (read->rd_offset + maxcount >=
2772 read->rd_fhp->fh_dentry->d_inode->i_size);
2773
2774 WRITE32(eof);
2775 WRITE32(maxcount);
2776 ADJUST_ARGS();
2777 resp->xbuf->head[0].iov_len = (char*)p
2778 - (char*)resp->xbuf->head[0].iov_base;
2779 resp->xbuf->page_len = maxcount;
2780
2781 /* Use rest of head for padding and remaining ops: */
2782 resp->xbuf->tail[0].iov_base = p;
2783 resp->xbuf->tail[0].iov_len = 0;
2784 if (maxcount&3) {
2785 RESERVE_SPACE(4);
2786 WRITE32(0);
2787 resp->xbuf->tail[0].iov_base += maxcount&3;
2788 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2789 ADJUST_ARGS();
2790 }
2791 return 0;
2792 }
2793
2794 static __be32
2795 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2796 {
2797 int maxcount;
2798 char *page;
2799 __be32 *p;
2800
2801 if (nfserr)
2802 return nfserr;
2803 if (resp->xbuf->page_len)
2804 return nfserr_resource;
2805
2806 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2807
2808 maxcount = PAGE_SIZE;
2809 RESERVE_SPACE(4);
2810
2811 /*
2812 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2813 * if they would overflow the buffer. Is this kosher in NFSv4? If
2814 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2815 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2816 */
2817 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2818 if (nfserr == nfserr_isdir)
2819 return nfserr_inval;
2820 if (nfserr)
2821 return nfserr;
2822
2823 WRITE32(maxcount);
2824 ADJUST_ARGS();
2825 resp->xbuf->head[0].iov_len = (char*)p
2826 - (char*)resp->xbuf->head[0].iov_base;
2827 resp->xbuf->page_len = maxcount;
2828
2829 /* Use rest of head for padding and remaining ops: */
2830 resp->xbuf->tail[0].iov_base = p;
2831 resp->xbuf->tail[0].iov_len = 0;
2832 if (maxcount&3) {
2833 RESERVE_SPACE(4);
2834 WRITE32(0);
2835 resp->xbuf->tail[0].iov_base += maxcount&3;
2836 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2837 ADJUST_ARGS();
2838 }
2839 return 0;
2840 }
2841
2842 static __be32
2843 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2844 {
2845 int maxcount;
2846 loff_t offset;
2847 __be32 *page, *savep, *tailbase;
2848 __be32 *p;
2849
2850 if (nfserr)
2851 return nfserr;
2852 if (resp->xbuf->page_len)
2853 return nfserr_resource;
2854
2855 RESERVE_SPACE(8); /* verifier */
2856 savep = p;
2857
2858 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2859 WRITE32(0);
2860 WRITE32(0);
2861 ADJUST_ARGS();
2862 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2863 tailbase = p;
2864
2865 maxcount = PAGE_SIZE;
2866 if (maxcount > readdir->rd_maxcount)
2867 maxcount = readdir->rd_maxcount;
2868
2869 /*
2870 * Convert from bytes to words, account for the two words already
2871 * written, make sure to leave two words at the end for the next
2872 * pointer and eof field.
2873 */
2874 maxcount = (maxcount >> 2) - 4;
2875 if (maxcount < 0) {
2876 nfserr = nfserr_toosmall;
2877 goto err_no_verf;
2878 }
2879
2880 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2881 readdir->common.err = 0;
2882 readdir->buflen = maxcount;
2883 readdir->buffer = page;
2884 readdir->offset = NULL;
2885
2886 offset = readdir->rd_cookie;
2887 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2888 &offset,
2889 &readdir->common, nfsd4_encode_dirent);
2890 if (nfserr == nfs_ok &&
2891 readdir->common.err == nfserr_toosmall &&
2892 readdir->buffer == page)
2893 nfserr = nfserr_toosmall;
2894 if (nfserr)
2895 goto err_no_verf;
2896
2897 if (readdir->offset)
2898 xdr_encode_hyper(readdir->offset, offset);
2899
2900 p = readdir->buffer;
2901 *p++ = 0; /* no more entries */
2902 *p++ = htonl(readdir->common.err == nfserr_eof);
2903 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2904 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2905
2906 /* Use rest of head for padding and remaining ops: */
2907 resp->xbuf->tail[0].iov_base = tailbase;
2908 resp->xbuf->tail[0].iov_len = 0;
2909 resp->p = resp->xbuf->tail[0].iov_base;
2910 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2911
2912 return 0;
2913 err_no_verf:
2914 p = savep;
2915 ADJUST_ARGS();
2916 return nfserr;
2917 }
2918
2919 static __be32
2920 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2921 {
2922 __be32 *p;
2923
2924 if (!nfserr) {
2925 RESERVE_SPACE(20);
2926 write_cinfo(&p, &remove->rm_cinfo);
2927 ADJUST_ARGS();
2928 }
2929 return nfserr;
2930 }
2931
2932 static __be32
2933 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2934 {
2935 __be32 *p;
2936
2937 if (!nfserr) {
2938 RESERVE_SPACE(40);
2939 write_cinfo(&p, &rename->rn_sinfo);
2940 write_cinfo(&p, &rename->rn_tinfo);
2941 ADJUST_ARGS();
2942 }
2943 return nfserr;
2944 }
2945
2946 static __be32
2947 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
2948 __be32 nfserr,struct svc_export *exp)
2949 {
2950 int i = 0;
2951 u32 nflavs;
2952 struct exp_flavor_info *flavs;
2953 struct exp_flavor_info def_flavs[2];
2954 __be32 *p;
2955
2956 if (nfserr)
2957 goto out;
2958 if (exp->ex_nflavors) {
2959 flavs = exp->ex_flavors;
2960 nflavs = exp->ex_nflavors;
2961 } else { /* Handling of some defaults in absence of real secinfo: */
2962 flavs = def_flavs;
2963 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2964 nflavs = 2;
2965 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2966 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2967 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2968 nflavs = 1;
2969 flavs[0].pseudoflavor
2970 = svcauth_gss_flavor(exp->ex_client);
2971 } else {
2972 nflavs = 1;
2973 flavs[0].pseudoflavor
2974 = exp->ex_client->flavour->flavour;
2975 }
2976 }
2977
2978 RESERVE_SPACE(4);
2979 WRITE32(nflavs);
2980 ADJUST_ARGS();
2981 for (i = 0; i < nflavs; i++) {
2982 u32 flav = flavs[i].pseudoflavor;
2983 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2984
2985 if (gm) {
2986 RESERVE_SPACE(4);
2987 WRITE32(RPC_AUTH_GSS);
2988 ADJUST_ARGS();
2989 RESERVE_SPACE(4 + gm->gm_oid.len);
2990 WRITE32(gm->gm_oid.len);
2991 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2992 ADJUST_ARGS();
2993 RESERVE_SPACE(4);
2994 WRITE32(0); /* qop */
2995 ADJUST_ARGS();
2996 RESERVE_SPACE(4);
2997 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2998 ADJUST_ARGS();
2999 gss_mech_put(gm);
3000 } else {
3001 RESERVE_SPACE(4);
3002 WRITE32(flav);
3003 ADJUST_ARGS();
3004 }
3005 }
3006 out:
3007 if (exp)
3008 exp_put(exp);
3009 return nfserr;
3010 }
3011
3012 static __be32
3013 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3014 struct nfsd4_secinfo *secinfo)
3015 {
3016 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3017 }
3018
3019 static __be32
3020 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3021 struct nfsd4_secinfo_no_name *secinfo)
3022 {
3023 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3024 }
3025
3026 /*
3027 * The SETATTR encode routine is special -- it always encodes a bitmap,
3028 * regardless of the error status.
3029 */
3030 static __be32
3031 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3032 {
3033 __be32 *p;
3034
3035 RESERVE_SPACE(12);
3036 if (nfserr) {
3037 WRITE32(2);
3038 WRITE32(0);
3039 WRITE32(0);
3040 }
3041 else {
3042 WRITE32(2);
3043 WRITE32(setattr->sa_bmval[0]);
3044 WRITE32(setattr->sa_bmval[1]);
3045 }
3046 ADJUST_ARGS();
3047 return nfserr;
3048 }
3049
3050 static __be32
3051 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3052 {
3053 __be32 *p;
3054
3055 if (!nfserr) {
3056 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
3057 WRITEMEM(&scd->se_clientid, 8);
3058 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
3059 ADJUST_ARGS();
3060 }
3061 else if (nfserr == nfserr_clid_inuse) {
3062 RESERVE_SPACE(8);
3063 WRITE32(0);
3064 WRITE32(0);
3065 ADJUST_ARGS();
3066 }
3067 return nfserr;
3068 }
3069
3070 static __be32
3071 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3072 {
3073 __be32 *p;
3074
3075 if (!nfserr) {
3076 RESERVE_SPACE(16);
3077 WRITE32(write->wr_bytes_written);
3078 WRITE32(write->wr_how_written);
3079 WRITEMEM(write->wr_verifier.data, 8);
3080 ADJUST_ARGS();
3081 }
3082 return nfserr;
3083 }
3084
3085 static __be32
3086 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
3087 struct nfsd4_exchange_id *exid)
3088 {
3089 __be32 *p;
3090 char *major_id;
3091 char *server_scope;
3092 int major_id_sz;
3093 int server_scope_sz;
3094 uint64_t minor_id = 0;
3095
3096 if (nfserr)
3097 return nfserr;
3098
3099 major_id = utsname()->nodename;
3100 major_id_sz = strlen(major_id);
3101 server_scope = utsname()->nodename;
3102 server_scope_sz = strlen(server_scope);
3103
3104 RESERVE_SPACE(
3105 8 /* eir_clientid */ +
3106 4 /* eir_sequenceid */ +
3107 4 /* eir_flags */ +
3108 4 /* spr_how (SP4_NONE) */ +
3109 8 /* so_minor_id */ +
3110 4 /* so_major_id.len */ +
3111 (XDR_QUADLEN(major_id_sz) * 4) +
3112 4 /* eir_server_scope.len */ +
3113 (XDR_QUADLEN(server_scope_sz) * 4) +
3114 4 /* eir_server_impl_id.count (0) */);
3115
3116 WRITEMEM(&exid->clientid, 8);
3117 WRITE32(exid->seqid);
3118 WRITE32(exid->flags);
3119
3120 /* state_protect4_r. Currently only support SP4_NONE */
3121 BUG_ON(exid->spa_how != SP4_NONE);
3122 WRITE32(exid->spa_how);
3123
3124 /* The server_owner struct */
3125 WRITE64(minor_id); /* Minor id */
3126 /* major id */
3127 WRITE32(major_id_sz);
3128 WRITEMEM(major_id, major_id_sz);
3129
3130 /* Server scope */
3131 WRITE32(server_scope_sz);
3132 WRITEMEM(server_scope, server_scope_sz);
3133
3134 /* Implementation id */
3135 WRITE32(0); /* zero length nfs_impl_id4 array */
3136 ADJUST_ARGS();
3137 return 0;
3138 }
3139
3140 static __be32
3141 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3142 struct nfsd4_create_session *sess)
3143 {
3144 __be32 *p;
3145
3146 if (nfserr)
3147 return nfserr;
3148
3149 RESERVE_SPACE(24);
3150 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3151 WRITE32(sess->seqid);
3152 WRITE32(sess->flags);
3153 ADJUST_ARGS();
3154
3155 RESERVE_SPACE(28);
3156 WRITE32(0); /* headerpadsz */
3157 WRITE32(sess->fore_channel.maxreq_sz);
3158 WRITE32(sess->fore_channel.maxresp_sz);
3159 WRITE32(sess->fore_channel.maxresp_cached);
3160 WRITE32(sess->fore_channel.maxops);
3161 WRITE32(sess->fore_channel.maxreqs);
3162 WRITE32(sess->fore_channel.nr_rdma_attrs);
3163 ADJUST_ARGS();
3164
3165 if (sess->fore_channel.nr_rdma_attrs) {
3166 RESERVE_SPACE(4);
3167 WRITE32(sess->fore_channel.rdma_attrs);
3168 ADJUST_ARGS();
3169 }
3170
3171 RESERVE_SPACE(28);
3172 WRITE32(0); /* headerpadsz */
3173 WRITE32(sess->back_channel.maxreq_sz);
3174 WRITE32(sess->back_channel.maxresp_sz);
3175 WRITE32(sess->back_channel.maxresp_cached);
3176 WRITE32(sess->back_channel.maxops);
3177 WRITE32(sess->back_channel.maxreqs);
3178 WRITE32(sess->back_channel.nr_rdma_attrs);
3179 ADJUST_ARGS();
3180
3181 if (sess->back_channel.nr_rdma_attrs) {
3182 RESERVE_SPACE(4);
3183 WRITE32(sess->back_channel.rdma_attrs);
3184 ADJUST_ARGS();
3185 }
3186 return 0;
3187 }
3188
3189 static __be32
3190 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3191 struct nfsd4_destroy_session *destroy_session)
3192 {
3193 return nfserr;
3194 }
3195
3196 static __be32
3197 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, int nfserr,
3198 struct nfsd4_free_stateid *free_stateid)
3199 {
3200 __be32 *p;
3201
3202 if (nfserr)
3203 return nfserr;
3204
3205 RESERVE_SPACE(4);
3206 WRITE32(nfserr);
3207 ADJUST_ARGS();
3208 return nfserr;
3209 }
3210
3211 static __be32
3212 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3213 struct nfsd4_sequence *seq)
3214 {
3215 __be32 *p;
3216
3217 if (nfserr)
3218 return nfserr;
3219
3220 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3221 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3222 WRITE32(seq->seqid);
3223 WRITE32(seq->slotid);
3224 WRITE32(seq->maxslots);
3225 /* For now: target_maxslots = maxslots */
3226 WRITE32(seq->maxslots);
3227 WRITE32(seq->status_flags);
3228
3229 ADJUST_ARGS();
3230 resp->cstate.datap = p; /* DRC cache data pointer */
3231 return 0;
3232 }
3233
3234 __be32
3235 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
3236 struct nfsd4_test_stateid *test_stateid)
3237 {
3238 struct nfsd4_compoundargs *argp;
3239 stateid_t si;
3240 __be32 *p;
3241 int i;
3242 int valid;
3243
3244 restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
3245 argp = test_stateid->ts_saved_args;
3246
3247 RESERVE_SPACE(4);
3248 *p++ = htonl(test_stateid->ts_num_ids);
3249 resp->p = p;
3250
3251 nfs4_lock_state();
3252 for (i = 0; i < test_stateid->ts_num_ids; i++) {
3253 nfsd4_decode_stateid(argp, &si);
3254 valid = nfs4_validate_stateid(&si, test_stateid->ts_has_session);
3255 RESERVE_SPACE(4);
3256 *p++ = htonl(valid);
3257 resp->p = p;
3258 }
3259 nfs4_unlock_state();
3260
3261 return nfserr;
3262 }
3263
3264 static __be32
3265 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3266 {
3267 return nfserr;
3268 }
3269
3270 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3271
3272 /*
3273 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3274 * since we don't need to filter out obsolete ops as this is
3275 * done in the decoding phase.
3276 */
3277 static nfsd4_enc nfsd4_enc_ops[] = {
3278 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3279 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3280 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3281 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3282 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3283 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3284 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3285 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3286 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3287 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3288 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3289 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3290 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3291 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3292 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3293 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3294 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3295 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3296 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3297 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3298 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3299 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3300 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3301 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3302 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3303 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3304 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3305 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3306 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3307 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3308 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3309 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3310 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3311 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3312 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3313 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3314 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3315
3316 /* NFSv4.1 operations */
3317 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3318 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3319 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3320 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3321 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3322 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3323 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3324 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3325 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3326 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3327 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3328 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3329 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3330 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3331 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3332 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3333 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3334 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3335 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3336 };
3337
3338 /*
3339 * Calculate the total amount of memory that the compound response has taken
3340 * after encoding the current operation.
3341 *
3342 * pad: add on 8 bytes for the next operation's op_code and status so that
3343 * there is room to cache a failure on the next operation.
3344 *
3345 * Compare this length to the session se_fmaxresp_cached.
3346 *
3347 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3348 * will be at least a page and will therefore hold the xdr_buf head.
3349 */
3350 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3351 {
3352 int status = 0;
3353 struct xdr_buf *xb = &resp->rqstp->rq_res;
3354 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3355 struct nfsd4_session *session = NULL;
3356 struct nfsd4_slot *slot = resp->cstate.slot;
3357 u32 length, tlen = 0, pad = 8;
3358
3359 if (!nfsd4_has_session(&resp->cstate))
3360 return status;
3361
3362 session = resp->cstate.session;
3363 if (session == NULL || slot->sl_cachethis == 0)
3364 return status;
3365
3366 if (resp->opcnt >= args->opcnt)
3367 pad = 0; /* this is the last operation */
3368
3369 if (xb->page_len == 0) {
3370 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3371 } else {
3372 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3373 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3374
3375 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3376 }
3377 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3378 length, xb->page_len, tlen, pad);
3379
3380 if (length <= session->se_fchannel.maxresp_cached)
3381 return status;
3382 else
3383 return nfserr_rep_too_big_to_cache;
3384 }
3385
3386 void
3387 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3388 {
3389 __be32 *statp;
3390 __be32 *p;
3391
3392 RESERVE_SPACE(8);
3393 WRITE32(op->opnum);
3394 statp = p++; /* to be backfilled at the end */
3395 ADJUST_ARGS();
3396
3397 if (op->opnum == OP_ILLEGAL)
3398 goto status;
3399 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3400 !nfsd4_enc_ops[op->opnum]);
3401 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3402 /* nfsd4_check_drc_limit guarantees enough room for error status */
3403 if (!op->status && nfsd4_check_drc_limit(resp))
3404 op->status = nfserr_rep_too_big_to_cache;
3405 status:
3406 /*
3407 * Note: We write the status directly, instead of using WRITE32(),
3408 * since it is already in network byte order.
3409 */
3410 *statp = op->status;
3411 }
3412
3413 /*
3414 * Encode the reply stored in the stateowner reply cache
3415 *
3416 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3417 * previously sent already encoded operation.
3418 *
3419 * called with nfs4_lock_state() held
3420 */
3421 void
3422 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3423 {
3424 __be32 *p;
3425 struct nfs4_replay *rp = op->replay;
3426
3427 BUG_ON(!rp);
3428
3429 RESERVE_SPACE(8);
3430 WRITE32(op->opnum);
3431 *p++ = rp->rp_status; /* already xdr'ed */
3432 ADJUST_ARGS();
3433
3434 RESERVE_SPACE(rp->rp_buflen);
3435 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3436 ADJUST_ARGS();
3437 }
3438
3439 int
3440 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3441 {
3442 return xdr_ressize_check(rqstp, p);
3443 }
3444
3445 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3446 {
3447 struct svc_rqst *rqstp = rq;
3448 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3449
3450 if (args->ops != args->iops) {
3451 kfree(args->ops);
3452 args->ops = args->iops;
3453 }
3454 kfree(args->tmpp);
3455 args->tmpp = NULL;
3456 while (args->to_free) {
3457 struct tmpbuf *tb = args->to_free;
3458 args->to_free = tb->next;
3459 tb->release(tb->buf);
3460 kfree(tb);
3461 }
3462 return 1;
3463 }
3464
3465 int
3466 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3467 {
3468 args->p = p;
3469 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3470 args->pagelist = rqstp->rq_arg.pages;
3471 args->pagelen = rqstp->rq_arg.page_len;
3472 args->tmpp = NULL;
3473 args->to_free = NULL;
3474 args->ops = args->iops;
3475 args->rqstp = rqstp;
3476
3477 return !nfsd4_decode_compound(args);
3478 }
3479
3480 int
3481 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3482 {
3483 /*
3484 * All that remains is to write the tag and operation count...
3485 */
3486 struct nfsd4_compound_state *cs = &resp->cstate;
3487 struct kvec *iov;
3488 p = resp->tagp;
3489 *p++ = htonl(resp->taglen);
3490 memcpy(p, resp->tag, resp->taglen);
3491 p += XDR_QUADLEN(resp->taglen);
3492 *p++ = htonl(resp->opcnt);
3493
3494 if (rqstp->rq_res.page_len)
3495 iov = &rqstp->rq_res.tail[0];
3496 else
3497 iov = &rqstp->rq_res.head[0];
3498 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3499 BUG_ON(iov->iov_len > PAGE_SIZE);
3500 if (nfsd4_has_session(cs)) {
3501 if (cs->status != nfserr_replay_cache) {
3502 nfsd4_store_cache_entry(resp);
3503 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3504 cs->slot->sl_inuse = false;
3505 }
3506 /* Renew the clientid on success and on replay */
3507 release_session_client(cs->session);
3508 nfsd4_put_session(cs->session);
3509 }
3510 return 1;
3511 }
3512
3513 /*
3514 * Local variables:
3515 * c-basic-offset: 8
3516 * End:
3517 */
linux-next