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Linux 4.19.133
[linux/fpc-iii.git] / fs / nfs / nfs3proc.c
blobec8a9efa268fec13f78daaf347b37a6b707d6f1e
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * linux/fs/nfs/nfs3proc.c
4 *
5 * Client-side NFSv3 procedures stubs.
6 *
7 * Copyright (C) 1997, Olaf Kirch
8 */
9
10 #include <linux/mm.h>
11 #include <linux/errno.h>
12 #include <linux/string.h>
13 #include <linux/sunrpc/clnt.h>
14 #include <linux/slab.h>
15 #include <linux/nfs.h>
16 #include <linux/nfs3.h>
17 #include <linux/nfs_fs.h>
18 #include <linux/nfs_page.h>
19 #include <linux/lockd/bind.h>
20 #include <linux/nfs_mount.h>
21 #include <linux/freezer.h>
22 #include <linux/xattr.h>
23
24 #include "iostat.h"
25 #include "internal.h"
26 #include "nfs3_fs.h"
27
28 #define NFSDBG_FACILITY NFSDBG_PROC
29
30 /* A wrapper to handle the EJUKEBOX error messages */
31 static int
32 nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
33 {
34 int res;
35 do {
36 res = rpc_call_sync(clnt, msg, flags);
37 if (res != -EJUKEBOX)
38 break;
39 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
40 res = -ERESTARTSYS;
41 } while (!fatal_signal_pending(current));
42 return res;
43 }
44
45 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
46
47 static int
48 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
49 {
50 if (task->tk_status != -EJUKEBOX)
51 return 0;
52 if (task->tk_status == -EJUKEBOX)
53 nfs_inc_stats(inode, NFSIOS_DELAY);
54 task->tk_status = 0;
55 rpc_restart_call(task);
56 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
57 return 1;
58 }
59
60 static int
61 do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
62 struct nfs_fsinfo *info)
63 {
64 struct rpc_message msg = {
65 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
66 .rpc_argp = fhandle,
67 .rpc_resp = info,
68 };
69 int status;
70
71 dprintk("%s: call fsinfo\n", __func__);
72 nfs_fattr_init(info->fattr);
73 status = rpc_call_sync(client, &msg, 0);
74 dprintk("%s: reply fsinfo: %d\n", __func__, status);
75 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
76 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
77 msg.rpc_resp = info->fattr;
78 status = rpc_call_sync(client, &msg, 0);
79 dprintk("%s: reply getattr: %d\n", __func__, status);
80 }
81 return status;
82 }
83
84 /*
85 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
86 */
87 static int
88 nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
89 struct nfs_fsinfo *info)
90 {
91 int status;
92
93 status = do_proc_get_root(server->client, fhandle, info);
94 if (status && server->nfs_client->cl_rpcclient != server->client)
95 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
96 return status;
97 }
98
99 /*
100 * One function for each procedure in the NFS protocol.
101 */
102 static int
103 nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
104 struct nfs_fattr *fattr, struct nfs4_label *label,
105 struct inode *inode)
106 {
107 struct rpc_message msg = {
108 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
109 .rpc_argp = fhandle,
110 .rpc_resp = fattr,
111 };
112 int status;
113
114 dprintk("NFS call getattr\n");
115 nfs_fattr_init(fattr);
116 status = rpc_call_sync(server->client, &msg, 0);
117 dprintk("NFS reply getattr: %d\n", status);
118 return status;
119 }
120
121 static int
122 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
123 struct iattr *sattr)
124 {
125 struct inode *inode = d_inode(dentry);
126 struct nfs3_sattrargs arg = {
127 .fh = NFS_FH(inode),
128 .sattr = sattr,
129 };
130 struct rpc_message msg = {
131 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
132 .rpc_argp = &arg,
133 .rpc_resp = fattr,
134 };
135 int status;
136
137 dprintk("NFS call setattr\n");
138 if (sattr->ia_valid & ATTR_FILE)
139 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
140 nfs_fattr_init(fattr);
141 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
142 if (status == 0) {
143 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
144 nfs_zap_acl_cache(inode);
145 nfs_setattr_update_inode(inode, sattr, fattr);
146 }
147 dprintk("NFS reply setattr: %d\n", status);
148 return status;
149 }
150
151 static int
152 nfs3_proc_lookup(struct inode *dir, const struct qstr *name,
153 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
154 struct nfs4_label *label)
155 {
156 struct nfs3_diropargs arg = {
157 .fh = NFS_FH(dir),
158 .name = name->name,
159 .len = name->len
160 };
161 struct nfs3_diropres res = {
162 .fh = fhandle,
163 .fattr = fattr
164 };
165 struct rpc_message msg = {
166 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
167 .rpc_argp = &arg,
168 .rpc_resp = &res,
169 };
170 int status;
171
172 dprintk("NFS call lookup %s\n", name->name);
173 res.dir_attr = nfs_alloc_fattr();
174 if (res.dir_attr == NULL)
175 return -ENOMEM;
176
177 nfs_fattr_init(fattr);
178 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
179 nfs_refresh_inode(dir, res.dir_attr);
180 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
181 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
182 msg.rpc_argp = fhandle;
183 msg.rpc_resp = fattr;
184 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
185 }
186 nfs_free_fattr(res.dir_attr);
187 dprintk("NFS reply lookup: %d\n", status);
188 return status;
189 }
190
191 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
192 {
193 struct nfs3_accessargs arg = {
194 .fh = NFS_FH(inode),
195 .access = entry->mask,
196 };
197 struct nfs3_accessres res;
198 struct rpc_message msg = {
199 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
200 .rpc_argp = &arg,
201 .rpc_resp = &res,
202 .rpc_cred = entry->cred,
203 };
204 int status = -ENOMEM;
205
206 dprintk("NFS call access\n");
207 res.fattr = nfs_alloc_fattr();
208 if (res.fattr == NULL)
209 goto out;
210
211 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
212 nfs_refresh_inode(inode, res.fattr);
213 if (status == 0)
214 nfs_access_set_mask(entry, res.access);
215 nfs_free_fattr(res.fattr);
216 out:
217 dprintk("NFS reply access: %d\n", status);
218 return status;
219 }
220
221 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
222 unsigned int pgbase, unsigned int pglen)
223 {
224 struct nfs_fattr *fattr;
225 struct nfs3_readlinkargs args = {
226 .fh = NFS_FH(inode),
227 .pgbase = pgbase,
228 .pglen = pglen,
229 .pages = &page
230 };
231 struct rpc_message msg = {
232 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
233 .rpc_argp = &args,
234 };
235 int status = -ENOMEM;
236
237 dprintk("NFS call readlink\n");
238 fattr = nfs_alloc_fattr();
239 if (fattr == NULL)
240 goto out;
241 msg.rpc_resp = fattr;
242
243 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
244 nfs_refresh_inode(inode, fattr);
245 nfs_free_fattr(fattr);
246 out:
247 dprintk("NFS reply readlink: %d\n", status);
248 return status;
249 }
250
251 struct nfs3_createdata {
252 struct rpc_message msg;
253 union {
254 struct nfs3_createargs create;
255 struct nfs3_mkdirargs mkdir;
256 struct nfs3_symlinkargs symlink;
257 struct nfs3_mknodargs mknod;
258 } arg;
259 struct nfs3_diropres res;
260 struct nfs_fh fh;
261 struct nfs_fattr fattr;
262 struct nfs_fattr dir_attr;
263 };
264
265 static struct nfs3_createdata *nfs3_alloc_createdata(void)
266 {
267 struct nfs3_createdata *data;
268
269 data = kzalloc(sizeof(*data), GFP_KERNEL);
270 if (data != NULL) {
271 data->msg.rpc_argp = &data->arg;
272 data->msg.rpc_resp = &data->res;
273 data->res.fh = &data->fh;
274 data->res.fattr = &data->fattr;
275 data->res.dir_attr = &data->dir_attr;
276 nfs_fattr_init(data->res.fattr);
277 nfs_fattr_init(data->res.dir_attr);
278 }
279 return data;
280 }
281
282 static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
283 {
284 int status;
285
286 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
287 nfs_post_op_update_inode(dir, data->res.dir_attr);
288 if (status == 0)
289 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
290 return status;
291 }
292
293 static void nfs3_free_createdata(struct nfs3_createdata *data)
294 {
295 kfree(data);
296 }
297
298 /*
299 * Create a regular file.
300 */
301 static int
302 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
303 int flags)
304 {
305 struct posix_acl *default_acl, *acl;
306 struct nfs3_createdata *data;
307 int status = -ENOMEM;
308
309 dprintk("NFS call create %pd\n", dentry);
310
311 data = nfs3_alloc_createdata();
312 if (data == NULL)
313 goto out;
314
315 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
316 data->arg.create.fh = NFS_FH(dir);
317 data->arg.create.name = dentry->d_name.name;
318 data->arg.create.len = dentry->d_name.len;
319 data->arg.create.sattr = sattr;
320
321 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
322 if (flags & O_EXCL) {
323 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
324 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
325 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
326 }
327
328 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
329 if (status)
330 goto out;
331
332 for (;;) {
333 status = nfs3_do_create(dir, dentry, data);
334
335 if (status != -ENOTSUPP)
336 break;
337 /* If the server doesn't support the exclusive creation
338 * semantics, try again with simple 'guarded' mode. */
339 switch (data->arg.create.createmode) {
340 case NFS3_CREATE_EXCLUSIVE:
341 data->arg.create.createmode = NFS3_CREATE_GUARDED;
342 break;
343
344 case NFS3_CREATE_GUARDED:
345 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
346 break;
347
348 case NFS3_CREATE_UNCHECKED:
349 goto out;
350 }
351 nfs_fattr_init(data->res.dir_attr);
352 nfs_fattr_init(data->res.fattr);
353 }
354
355 if (status != 0)
356 goto out_release_acls;
357
358 /* When we created the file with exclusive semantics, make
359 * sure we set the attributes afterwards. */
360 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
361 dprintk("NFS call setattr (post-create)\n");
362
363 if (!(sattr->ia_valid & ATTR_ATIME_SET))
364 sattr->ia_valid |= ATTR_ATIME;
365 if (!(sattr->ia_valid & ATTR_MTIME_SET))
366 sattr->ia_valid |= ATTR_MTIME;
367
368 /* Note: we could use a guarded setattr here, but I'm
369 * not sure this buys us anything (and I'd have
370 * to revamp the NFSv3 XDR code) */
371 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
372 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
373 dprintk("NFS reply setattr (post-create): %d\n", status);
374 if (status != 0)
375 goto out_release_acls;
376 }
377
378 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
379
380 out_release_acls:
381 posix_acl_release(acl);
382 posix_acl_release(default_acl);
383 out:
384 nfs3_free_createdata(data);
385 dprintk("NFS reply create: %d\n", status);
386 return status;
387 }
388
389 static int
390 nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
391 {
392 struct nfs_removeargs arg = {
393 .fh = NFS_FH(dir),
394 .name = dentry->d_name,
395 };
396 struct nfs_removeres res;
397 struct rpc_message msg = {
398 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
399 .rpc_argp = &arg,
400 .rpc_resp = &res,
401 };
402 int status = -ENOMEM;
403
404 dprintk("NFS call remove %pd2\n", dentry);
405 res.dir_attr = nfs_alloc_fattr();
406 if (res.dir_attr == NULL)
407 goto out;
408
409 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
410 nfs_post_op_update_inode(dir, res.dir_attr);
411 nfs_free_fattr(res.dir_attr);
412 out:
413 dprintk("NFS reply remove: %d\n", status);
414 return status;
415 }
416
417 static void
418 nfs3_proc_unlink_setup(struct rpc_message *msg,
419 struct dentry *dentry,
420 struct inode *inode)
421 {
422 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
423 }
424
425 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
426 {
427 rpc_call_start(task);
428 }
429
430 static int
431 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
432 {
433 struct nfs_removeres *res;
434 if (nfs3_async_handle_jukebox(task, dir))
435 return 0;
436 res = task->tk_msg.rpc_resp;
437 nfs_post_op_update_inode(dir, res->dir_attr);
438 return 1;
439 }
440
441 static void
442 nfs3_proc_rename_setup(struct rpc_message *msg,
443 struct dentry *old_dentry,
444 struct dentry *new_dentry)
445 {
446 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
447 }
448
449 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
450 {
451 rpc_call_start(task);
452 }
453
454 static int
455 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
456 struct inode *new_dir)
457 {
458 struct nfs_renameres *res;
459
460 if (nfs3_async_handle_jukebox(task, old_dir))
461 return 0;
462 res = task->tk_msg.rpc_resp;
463
464 nfs_post_op_update_inode(old_dir, res->old_fattr);
465 nfs_post_op_update_inode(new_dir, res->new_fattr);
466 return 1;
467 }
468
469 static int
470 nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
471 {
472 struct nfs3_linkargs arg = {
473 .fromfh = NFS_FH(inode),
474 .tofh = NFS_FH(dir),
475 .toname = name->name,
476 .tolen = name->len
477 };
478 struct nfs3_linkres res;
479 struct rpc_message msg = {
480 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
481 .rpc_argp = &arg,
482 .rpc_resp = &res,
483 };
484 int status = -ENOMEM;
485
486 dprintk("NFS call link %s\n", name->name);
487 res.fattr = nfs_alloc_fattr();
488 res.dir_attr = nfs_alloc_fattr();
489 if (res.fattr == NULL || res.dir_attr == NULL)
490 goto out;
491
492 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
493 nfs_post_op_update_inode(dir, res.dir_attr);
494 nfs_post_op_update_inode(inode, res.fattr);
495 out:
496 nfs_free_fattr(res.dir_attr);
497 nfs_free_fattr(res.fattr);
498 dprintk("NFS reply link: %d\n", status);
499 return status;
500 }
501
502 static int
503 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
504 unsigned int len, struct iattr *sattr)
505 {
506 struct nfs3_createdata *data;
507 int status = -ENOMEM;
508
509 if (len > NFS3_MAXPATHLEN)
510 return -ENAMETOOLONG;
511
512 dprintk("NFS call symlink %pd\n", dentry);
513
514 data = nfs3_alloc_createdata();
515 if (data == NULL)
516 goto out;
517 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
518 data->arg.symlink.fromfh = NFS_FH(dir);
519 data->arg.symlink.fromname = dentry->d_name.name;
520 data->arg.symlink.fromlen = dentry->d_name.len;
521 data->arg.symlink.pages = &page;
522 data->arg.symlink.pathlen = len;
523 data->arg.symlink.sattr = sattr;
524
525 status = nfs3_do_create(dir, dentry, data);
526
527 nfs3_free_createdata(data);
528 out:
529 dprintk("NFS reply symlink: %d\n", status);
530 return status;
531 }
532
533 static int
534 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
535 {
536 struct posix_acl *default_acl, *acl;
537 struct nfs3_createdata *data;
538 int status = -ENOMEM;
539
540 dprintk("NFS call mkdir %pd\n", dentry);
541
542 data = nfs3_alloc_createdata();
543 if (data == NULL)
544 goto out;
545
546 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
547 if (status)
548 goto out;
549
550 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
551 data->arg.mkdir.fh = NFS_FH(dir);
552 data->arg.mkdir.name = dentry->d_name.name;
553 data->arg.mkdir.len = dentry->d_name.len;
554 data->arg.mkdir.sattr = sattr;
555
556 status = nfs3_do_create(dir, dentry, data);
557 if (status != 0)
558 goto out_release_acls;
559
560 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
561
562 out_release_acls:
563 posix_acl_release(acl);
564 posix_acl_release(default_acl);
565 out:
566 nfs3_free_createdata(data);
567 dprintk("NFS reply mkdir: %d\n", status);
568 return status;
569 }
570
571 static int
572 nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
573 {
574 struct nfs_fattr *dir_attr;
575 struct nfs3_diropargs arg = {
576 .fh = NFS_FH(dir),
577 .name = name->name,
578 .len = name->len
579 };
580 struct rpc_message msg = {
581 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
582 .rpc_argp = &arg,
583 };
584 int status = -ENOMEM;
585
586 dprintk("NFS call rmdir %s\n", name->name);
587 dir_attr = nfs_alloc_fattr();
588 if (dir_attr == NULL)
589 goto out;
590
591 msg.rpc_resp = dir_attr;
592 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
593 nfs_post_op_update_inode(dir, dir_attr);
594 nfs_free_fattr(dir_attr);
595 out:
596 dprintk("NFS reply rmdir: %d\n", status);
597 return status;
598 }
599
600 /*
601 * The READDIR implementation is somewhat hackish - we pass the user buffer
602 * to the encode function, which installs it in the receive iovec.
603 * The decode function itself doesn't perform any decoding, it just makes
604 * sure the reply is syntactically correct.
605 *
606 * Also note that this implementation handles both plain readdir and
607 * readdirplus.
608 */
609 static int
610 nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
611 u64 cookie, struct page **pages, unsigned int count, bool plus)
612 {
613 struct inode *dir = d_inode(dentry);
614 __be32 *verf = NFS_I(dir)->cookieverf;
615 struct nfs3_readdirargs arg = {
616 .fh = NFS_FH(dir),
617 .cookie = cookie,
618 .verf = {verf[0], verf[1]},
619 .plus = plus,
620 .count = count,
621 .pages = pages
622 };
623 struct nfs3_readdirres res = {
624 .verf = verf,
625 .plus = plus
626 };
627 struct rpc_message msg = {
628 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
629 .rpc_argp = &arg,
630 .rpc_resp = &res,
631 .rpc_cred = cred
632 };
633 int status = -ENOMEM;
634
635 if (plus)
636 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
637
638 dprintk("NFS call readdir%s %d\n",
639 plus? "plus" : "", (unsigned int) cookie);
640
641 res.dir_attr = nfs_alloc_fattr();
642 if (res.dir_attr == NULL)
643 goto out;
644
645 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
646
647 nfs_invalidate_atime(dir);
648 nfs_refresh_inode(dir, res.dir_attr);
649
650 nfs_free_fattr(res.dir_attr);
651 out:
652 dprintk("NFS reply readdir%s: %d\n",
653 plus? "plus" : "", status);
654 return status;
655 }
656
657 static int
658 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
659 dev_t rdev)
660 {
661 struct posix_acl *default_acl, *acl;
662 struct nfs3_createdata *data;
663 int status = -ENOMEM;
664
665 dprintk("NFS call mknod %pd %u:%u\n", dentry,
666 MAJOR(rdev), MINOR(rdev));
667
668 data = nfs3_alloc_createdata();
669 if (data == NULL)
670 goto out;
671
672 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
673 if (status)
674 goto out;
675
676 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
677 data->arg.mknod.fh = NFS_FH(dir);
678 data->arg.mknod.name = dentry->d_name.name;
679 data->arg.mknod.len = dentry->d_name.len;
680 data->arg.mknod.sattr = sattr;
681 data->arg.mknod.rdev = rdev;
682
683 switch (sattr->ia_mode & S_IFMT) {
684 case S_IFBLK:
685 data->arg.mknod.type = NF3BLK;
686 break;
687 case S_IFCHR:
688 data->arg.mknod.type = NF3CHR;
689 break;
690 case S_IFIFO:
691 data->arg.mknod.type = NF3FIFO;
692 break;
693 case S_IFSOCK:
694 data->arg.mknod.type = NF3SOCK;
695 break;
696 default:
697 status = -EINVAL;
698 goto out;
699 }
700
701 status = nfs3_do_create(dir, dentry, data);
702 if (status != 0)
703 goto out_release_acls;
704
705 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
706
707 out_release_acls:
708 posix_acl_release(acl);
709 posix_acl_release(default_acl);
710 out:
711 nfs3_free_createdata(data);
712 dprintk("NFS reply mknod: %d\n", status);
713 return status;
714 }
715
716 static int
717 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
718 struct nfs_fsstat *stat)
719 {
720 struct rpc_message msg = {
721 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
722 .rpc_argp = fhandle,
723 .rpc_resp = stat,
724 };
725 int status;
726
727 dprintk("NFS call fsstat\n");
728 nfs_fattr_init(stat->fattr);
729 status = rpc_call_sync(server->client, &msg, 0);
730 dprintk("NFS reply fsstat: %d\n", status);
731 return status;
732 }
733
734 static int
735 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
736 struct nfs_fsinfo *info)
737 {
738 struct rpc_message msg = {
739 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
740 .rpc_argp = fhandle,
741 .rpc_resp = info,
742 };
743 int status;
744
745 dprintk("NFS call fsinfo\n");
746 nfs_fattr_init(info->fattr);
747 status = rpc_call_sync(client, &msg, 0);
748 dprintk("NFS reply fsinfo: %d\n", status);
749 return status;
750 }
751
752 /*
753 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
754 * nfs_create_server
755 */
756 static int
757 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
758 struct nfs_fsinfo *info)
759 {
760 int status;
761
762 status = do_proc_fsinfo(server->client, fhandle, info);
763 if (status && server->nfs_client->cl_rpcclient != server->client)
764 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
765 return status;
766 }
767
768 static int
769 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
770 struct nfs_pathconf *info)
771 {
772 struct rpc_message msg = {
773 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
774 .rpc_argp = fhandle,
775 .rpc_resp = info,
776 };
777 int status;
778
779 dprintk("NFS call pathconf\n");
780 nfs_fattr_init(info->fattr);
781 status = rpc_call_sync(server->client, &msg, 0);
782 dprintk("NFS reply pathconf: %d\n", status);
783 return status;
784 }
785
786 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
787 {
788 struct inode *inode = hdr->inode;
789
790 if (hdr->pgio_done_cb != NULL)
791 return hdr->pgio_done_cb(task, hdr);
792
793 if (nfs3_async_handle_jukebox(task, inode))
794 return -EAGAIN;
795
796 nfs_invalidate_atime(inode);
797 nfs_refresh_inode(inode, &hdr->fattr);
798 return 0;
799 }
800
801 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
802 struct rpc_message *msg)
803 {
804 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
805 }
806
807 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
808 struct nfs_pgio_header *hdr)
809 {
810 rpc_call_start(task);
811 return 0;
812 }
813
814 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
815 {
816 struct inode *inode = hdr->inode;
817
818 if (hdr->pgio_done_cb != NULL)
819 return hdr->pgio_done_cb(task, hdr);
820
821 if (nfs3_async_handle_jukebox(task, inode))
822 return -EAGAIN;
823 if (task->tk_status >= 0)
824 nfs_writeback_update_inode(hdr);
825 return 0;
826 }
827
828 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
829 struct rpc_message *msg,
830 struct rpc_clnt **clnt)
831 {
832 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
833 }
834
835 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
836 {
837 rpc_call_start(task);
838 }
839
840 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
841 {
842 if (data->commit_done_cb != NULL)
843 return data->commit_done_cb(task, data);
844
845 if (nfs3_async_handle_jukebox(task, data->inode))
846 return -EAGAIN;
847 nfs_refresh_inode(data->inode, data->res.fattr);
848 return 0;
849 }
850
851 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
852 struct rpc_clnt **clnt)
853 {
854 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
855 }
856
857 static void nfs3_nlm_alloc_call(void *data)
858 {
859 struct nfs_lock_context *l_ctx = data;
860 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
861 get_nfs_open_context(l_ctx->open_context);
862 nfs_get_lock_context(l_ctx->open_context);
863 }
864 }
865
866 static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
867 {
868 struct nfs_lock_context *l_ctx = data;
869 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
870 return nfs_async_iocounter_wait(task, l_ctx);
871 return false;
872
873 }
874
875 static void nfs3_nlm_release_call(void *data)
876 {
877 struct nfs_lock_context *l_ctx = data;
878 struct nfs_open_context *ctx;
879 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
880 ctx = l_ctx->open_context;
881 nfs_put_lock_context(l_ctx);
882 put_nfs_open_context(ctx);
883 }
884 }
885
886 static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
887 .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
888 .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
889 .nlmclnt_release_call = nfs3_nlm_release_call,
890 };
891
892 static int
893 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
894 {
895 struct inode *inode = file_inode(filp);
896 struct nfs_lock_context *l_ctx = NULL;
897 struct nfs_open_context *ctx = nfs_file_open_context(filp);
898 int status;
899
900 if (fl->fl_flags & FL_CLOSE) {
901 l_ctx = nfs_get_lock_context(ctx);
902 if (IS_ERR(l_ctx))
903 l_ctx = NULL;
904 else
905 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
906 }
907
908 status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
909
910 if (l_ctx)
911 nfs_put_lock_context(l_ctx);
912
913 return status;
914 }
915
916 static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
917 {
918 return 0;
919 }
920
921 static const struct inode_operations nfs3_dir_inode_operations = {
922 .create = nfs_create,
923 .lookup = nfs_lookup,
924 .link = nfs_link,
925 .unlink = nfs_unlink,
926 .symlink = nfs_symlink,
927 .mkdir = nfs_mkdir,
928 .rmdir = nfs_rmdir,
929 .mknod = nfs_mknod,
930 .rename = nfs_rename,
931 .permission = nfs_permission,
932 .getattr = nfs_getattr,
933 .setattr = nfs_setattr,
934 #ifdef CONFIG_NFS_V3_ACL
935 .listxattr = nfs3_listxattr,
936 .get_acl = nfs3_get_acl,
937 .set_acl = nfs3_set_acl,
938 #endif
939 };
940
941 static const struct inode_operations nfs3_file_inode_operations = {
942 .permission = nfs_permission,
943 .getattr = nfs_getattr,
944 .setattr = nfs_setattr,
945 #ifdef CONFIG_NFS_V3_ACL
946 .listxattr = nfs3_listxattr,
947 .get_acl = nfs3_get_acl,
948 .set_acl = nfs3_set_acl,
949 #endif
950 };
951
952 const struct nfs_rpc_ops nfs_v3_clientops = {
953 .version = 3, /* protocol version */
954 .dentry_ops = &nfs_dentry_operations,
955 .dir_inode_ops = &nfs3_dir_inode_operations,
956 .file_inode_ops = &nfs3_file_inode_operations,
957 .file_ops = &nfs_file_operations,
958 .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
959 .getroot = nfs3_proc_get_root,
960 .submount = nfs_submount,
961 .try_mount = nfs_try_mount,
962 .getattr = nfs3_proc_getattr,
963 .setattr = nfs3_proc_setattr,
964 .lookup = nfs3_proc_lookup,
965 .access = nfs3_proc_access,
966 .readlink = nfs3_proc_readlink,
967 .create = nfs3_proc_create,
968 .remove = nfs3_proc_remove,
969 .unlink_setup = nfs3_proc_unlink_setup,
970 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
971 .unlink_done = nfs3_proc_unlink_done,
972 .rename_setup = nfs3_proc_rename_setup,
973 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
974 .rename_done = nfs3_proc_rename_done,
975 .link = nfs3_proc_link,
976 .symlink = nfs3_proc_symlink,
977 .mkdir = nfs3_proc_mkdir,
978 .rmdir = nfs3_proc_rmdir,
979 .readdir = nfs3_proc_readdir,
980 .mknod = nfs3_proc_mknod,
981 .statfs = nfs3_proc_statfs,
982 .fsinfo = nfs3_proc_fsinfo,
983 .pathconf = nfs3_proc_pathconf,
984 .decode_dirent = nfs3_decode_dirent,
985 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
986 .read_setup = nfs3_proc_read_setup,
987 .read_done = nfs3_read_done,
988 .write_setup = nfs3_proc_write_setup,
989 .write_done = nfs3_write_done,
990 .commit_setup = nfs3_proc_commit_setup,
991 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
992 .commit_done = nfs3_commit_done,
993 .lock = nfs3_proc_lock,
994 .clear_acl_cache = forget_all_cached_acls,
995 .close_context = nfs_close_context,
996 .have_delegation = nfs3_have_delegation,
997 .alloc_client = nfs_alloc_client,
998 .init_client = nfs_init_client,
999 .free_client = nfs_free_client,
1000 .create_server = nfs3_create_server,
1001 .clone_server = nfs3_clone_server,
1002 };
Linux with added FPC-III support