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 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
40 schedule_timeout(NFS_JUKEBOX_RETRY_TIME);
41 res = -ERESTARTSYS;
42 } while (!fatal_signal_pending(current));
43 return res;
44 }
45
46 #define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
47
48 static int
49 nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
50 {
51 if (task->tk_status != -EJUKEBOX)
52 return 0;
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 inode *inode)
105 {
106 struct rpc_message msg = {
107 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
108 .rpc_argp = fhandle,
109 .rpc_resp = fattr,
110 };
111 int status;
112 unsigned short task_flags = 0;
113
114 /* Is this is an attribute revalidation, subject to softreval? */
115 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL))
116 task_flags |= RPC_TASK_TIMEOUT;
117
118 dprintk("NFS call getattr\n");
119 nfs_fattr_init(fattr);
120 status = rpc_call_sync(server->client, &msg, task_flags);
121 dprintk("NFS reply getattr: %d\n", status);
122 return status;
123 }
124
125 static int
126 nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
127 struct iattr *sattr)
128 {
129 struct inode *inode = d_inode(dentry);
130 struct nfs3_sattrargs arg = {
131 .fh = NFS_FH(inode),
132 .sattr = sattr,
133 };
134 struct rpc_message msg = {
135 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
136 .rpc_argp = &arg,
137 .rpc_resp = fattr,
138 };
139 int status;
140
141 dprintk("NFS call setattr\n");
142 if (sattr->ia_valid & ATTR_FILE)
143 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
144 nfs_fattr_init(fattr);
145 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
146 if (status == 0) {
147 nfs_setattr_update_inode(inode, sattr, fattr);
148 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
149 nfs_zap_acl_cache(inode);
150 }
151 dprintk("NFS reply setattr: %d\n", status);
152 return status;
153 }
154
155 static int
156 __nfs3_proc_lookup(struct inode *dir, const char *name, size_t len,
157 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
158 unsigned short task_flags)
159 {
160 struct nfs3_diropargs arg = {
161 .fh = NFS_FH(dir),
162 .name = name,
163 .len = len
164 };
165 struct nfs3_diropres res = {
166 .fh = fhandle,
167 .fattr = fattr
168 };
169 struct rpc_message msg = {
170 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
171 .rpc_argp = &arg,
172 .rpc_resp = &res,
173 };
174 int status;
175
176 res.dir_attr = nfs_alloc_fattr();
177 if (res.dir_attr == NULL)
178 return -ENOMEM;
179
180 nfs_fattr_init(fattr);
181 status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
182 nfs_refresh_inode(dir, res.dir_attr);
183 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
184 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
185 msg.rpc_argp = fhandle;
186 msg.rpc_resp = fattr;
187 status = rpc_call_sync(NFS_CLIENT(dir), &msg, task_flags);
188 }
189 nfs_free_fattr(res.dir_attr);
190 dprintk("NFS reply lookup: %d\n", status);
191 return status;
192 }
193
194 static int
195 nfs3_proc_lookup(struct inode *dir, struct dentry *dentry,
196 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
197 {
198 unsigned short task_flags = 0;
199
200 /* Is this is an attribute revalidation, subject to softreval? */
201 if (nfs_lookup_is_soft_revalidate(dentry))
202 task_flags |= RPC_TASK_TIMEOUT;
203
204 dprintk("NFS call lookup %pd2\n", dentry);
205 return __nfs3_proc_lookup(dir, dentry->d_name.name,
206 dentry->d_name.len, fhandle, fattr,
207 task_flags);
208 }
209
210 static int nfs3_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
211 struct nfs_fattr *fattr)
212 {
213 const char dotdot[] = "..";
214 const size_t len = strlen(dotdot);
215 unsigned short task_flags = 0;
216
217 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL)
218 task_flags |= RPC_TASK_TIMEOUT;
219
220 return __nfs3_proc_lookup(inode, dotdot, len, fhandle, fattr,
221 task_flags);
222 }
223
224 static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry,
225 const struct cred *cred)
226 {
227 struct nfs3_accessargs arg = {
228 .fh = NFS_FH(inode),
229 .access = entry->mask,
230 };
231 struct nfs3_accessres res;
232 struct rpc_message msg = {
233 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
234 .rpc_argp = &arg,
235 .rpc_resp = &res,
236 .rpc_cred = cred,
237 };
238 int status = -ENOMEM;
239
240 dprintk("NFS call access\n");
241 res.fattr = nfs_alloc_fattr();
242 if (res.fattr == NULL)
243 goto out;
244
245 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
246 nfs_refresh_inode(inode, res.fattr);
247 if (status == 0)
248 nfs_access_set_mask(entry, res.access);
249 nfs_free_fattr(res.fattr);
250 out:
251 dprintk("NFS reply access: %d\n", status);
252 return status;
253 }
254
255 static int nfs3_proc_readlink(struct inode *inode, struct page *page,
256 unsigned int pgbase, unsigned int pglen)
257 {
258 struct nfs_fattr *fattr;
259 struct nfs3_readlinkargs args = {
260 .fh = NFS_FH(inode),
261 .pgbase = pgbase,
262 .pglen = pglen,
263 .pages = &page
264 };
265 struct rpc_message msg = {
266 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
267 .rpc_argp = &args,
268 };
269 int status = -ENOMEM;
270
271 dprintk("NFS call readlink\n");
272 fattr = nfs_alloc_fattr();
273 if (fattr == NULL)
274 goto out;
275 msg.rpc_resp = fattr;
276
277 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
278 nfs_refresh_inode(inode, fattr);
279 nfs_free_fattr(fattr);
280 out:
281 dprintk("NFS reply readlink: %d\n", status);
282 return status;
283 }
284
285 struct nfs3_createdata {
286 struct rpc_message msg;
287 union {
288 struct nfs3_createargs create;
289 struct nfs3_mkdirargs mkdir;
290 struct nfs3_symlinkargs symlink;
291 struct nfs3_mknodargs mknod;
292 } arg;
293 struct nfs3_diropres res;
294 struct nfs_fh fh;
295 struct nfs_fattr fattr;
296 struct nfs_fattr dir_attr;
297 };
298
299 static struct nfs3_createdata *nfs3_alloc_createdata(void)
300 {
301 struct nfs3_createdata *data;
302
303 data = kzalloc(sizeof(*data), GFP_KERNEL);
304 if (data != NULL) {
305 data->msg.rpc_argp = &data->arg;
306 data->msg.rpc_resp = &data->res;
307 data->res.fh = &data->fh;
308 data->res.fattr = &data->fattr;
309 data->res.dir_attr = &data->dir_attr;
310 nfs_fattr_init(data->res.fattr);
311 nfs_fattr_init(data->res.dir_attr);
312 }
313 return data;
314 }
315
316 static struct dentry *
317 nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
318 {
319 int status;
320
321 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
322 nfs_post_op_update_inode(dir, data->res.dir_attr);
323 if (status != 0)
324 return ERR_PTR(status);
325
326 return nfs_add_or_obtain(dentry, data->res.fh, data->res.fattr);
327 }
328
329 static void nfs3_free_createdata(struct nfs3_createdata *data)
330 {
331 kfree(data);
332 }
333
334 /*
335 * Create a regular file.
336 */
337 static int
338 nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
339 int flags)
340 {
341 struct posix_acl *default_acl, *acl;
342 struct nfs3_createdata *data;
343 struct dentry *d_alias;
344 int status = -ENOMEM;
345
346 dprintk("NFS call create %pd\n", dentry);
347
348 data = nfs3_alloc_createdata();
349 if (data == NULL)
350 goto out;
351
352 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
353 data->arg.create.fh = NFS_FH(dir);
354 data->arg.create.name = dentry->d_name.name;
355 data->arg.create.len = dentry->d_name.len;
356 data->arg.create.sattr = sattr;
357
358 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
359 if (flags & O_EXCL) {
360 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
361 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
362 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
363 }
364
365 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
366 if (status)
367 goto out;
368
369 for (;;) {
370 d_alias = nfs3_do_create(dir, dentry, data);
371 status = PTR_ERR_OR_ZERO(d_alias);
372
373 if (status != -ENOTSUPP)
374 break;
375 /* If the server doesn't support the exclusive creation
376 * semantics, try again with simple 'guarded' mode. */
377 switch (data->arg.create.createmode) {
378 case NFS3_CREATE_EXCLUSIVE:
379 data->arg.create.createmode = NFS3_CREATE_GUARDED;
380 break;
381
382 case NFS3_CREATE_GUARDED:
383 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
384 break;
385
386 case NFS3_CREATE_UNCHECKED:
387 goto out_release_acls;
388 }
389 nfs_fattr_init(data->res.dir_attr);
390 nfs_fattr_init(data->res.fattr);
391 }
392
393 if (status != 0)
394 goto out_release_acls;
395
396 if (d_alias)
397 dentry = d_alias;
398
399 /* When we created the file with exclusive semantics, make
400 * sure we set the attributes afterwards. */
401 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
402 dprintk("NFS call setattr (post-create)\n");
403
404 if (!(sattr->ia_valid & ATTR_ATIME_SET))
405 sattr->ia_valid |= ATTR_ATIME;
406 if (!(sattr->ia_valid & ATTR_MTIME_SET))
407 sattr->ia_valid |= ATTR_MTIME;
408
409 /* Note: we could use a guarded setattr here, but I'm
410 * not sure this buys us anything (and I'd have
411 * to revamp the NFSv3 XDR code) */
412 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
413 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
414 dprintk("NFS reply setattr (post-create): %d\n", status);
415 if (status != 0)
416 goto out_dput;
417 }
418
419 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
420
421 out_dput:
422 dput(d_alias);
423 out_release_acls:
424 posix_acl_release(acl);
425 posix_acl_release(default_acl);
426 out:
427 nfs3_free_createdata(data);
428 dprintk("NFS reply create: %d\n", status);
429 return status;
430 }
431
432 static int
433 nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
434 {
435 struct nfs_removeargs arg = {
436 .fh = NFS_FH(dir),
437 .name = dentry->d_name,
438 };
439 struct nfs_removeres res;
440 struct rpc_message msg = {
441 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
442 .rpc_argp = &arg,
443 .rpc_resp = &res,
444 };
445 int status = -ENOMEM;
446
447 dprintk("NFS call remove %pd2\n", dentry);
448 res.dir_attr = nfs_alloc_fattr();
449 if (res.dir_attr == NULL)
450 goto out;
451
452 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
453 nfs_post_op_update_inode(dir, res.dir_attr);
454 nfs_free_fattr(res.dir_attr);
455 out:
456 dprintk("NFS reply remove: %d\n", status);
457 return status;
458 }
459
460 static void
461 nfs3_proc_unlink_setup(struct rpc_message *msg,
462 struct dentry *dentry,
463 struct inode *inode)
464 {
465 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
466 }
467
468 static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
469 {
470 rpc_call_start(task);
471 }
472
473 static int
474 nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
475 {
476 struct nfs_removeres *res;
477 if (nfs3_async_handle_jukebox(task, dir))
478 return 0;
479 res = task->tk_msg.rpc_resp;
480 nfs_post_op_update_inode(dir, res->dir_attr);
481 return 1;
482 }
483
484 static void
485 nfs3_proc_rename_setup(struct rpc_message *msg,
486 struct dentry *old_dentry,
487 struct dentry *new_dentry)
488 {
489 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
490 }
491
492 static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
493 {
494 rpc_call_start(task);
495 }
496
497 static int
498 nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
499 struct inode *new_dir)
500 {
501 struct nfs_renameres *res;
502
503 if (nfs3_async_handle_jukebox(task, old_dir))
504 return 0;
505 res = task->tk_msg.rpc_resp;
506
507 nfs_post_op_update_inode(old_dir, res->old_fattr);
508 nfs_post_op_update_inode(new_dir, res->new_fattr);
509 return 1;
510 }
511
512 static int
513 nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
514 {
515 struct nfs3_linkargs arg = {
516 .fromfh = NFS_FH(inode),
517 .tofh = NFS_FH(dir),
518 .toname = name->name,
519 .tolen = name->len
520 };
521 struct nfs3_linkres res;
522 struct rpc_message msg = {
523 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
524 .rpc_argp = &arg,
525 .rpc_resp = &res,
526 };
527 int status = -ENOMEM;
528
529 dprintk("NFS call link %s\n", name->name);
530 res.fattr = nfs_alloc_fattr();
531 res.dir_attr = nfs_alloc_fattr();
532 if (res.fattr == NULL || res.dir_attr == NULL)
533 goto out;
534
535 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
536 nfs_post_op_update_inode(dir, res.dir_attr);
537 nfs_post_op_update_inode(inode, res.fattr);
538 out:
539 nfs_free_fattr(res.dir_attr);
540 nfs_free_fattr(res.fattr);
541 dprintk("NFS reply link: %d\n", status);
542 return status;
543 }
544
545 static int
546 nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct folio *folio,
547 unsigned int len, struct iattr *sattr)
548 {
549 struct page *page = &folio->page;
550 struct nfs3_createdata *data;
551 struct dentry *d_alias;
552 int status = -ENOMEM;
553
554 if (len > NFS3_MAXPATHLEN)
555 return -ENAMETOOLONG;
556
557 dprintk("NFS call symlink %pd\n", dentry);
558
559 data = nfs3_alloc_createdata();
560 if (data == NULL)
561 goto out;
562 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
563 data->arg.symlink.fromfh = NFS_FH(dir);
564 data->arg.symlink.fromname = dentry->d_name.name;
565 data->arg.symlink.fromlen = dentry->d_name.len;
566 data->arg.symlink.pages = &page;
567 data->arg.symlink.pathlen = len;
568 data->arg.symlink.sattr = sattr;
569
570 d_alias = nfs3_do_create(dir, dentry, data);
571 status = PTR_ERR_OR_ZERO(d_alias);
572
573 if (status == 0)
574 dput(d_alias);
575
576 nfs3_free_createdata(data);
577 out:
578 dprintk("NFS reply symlink: %d\n", status);
579 return status;
580 }
581
582 static int
583 nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
584 {
585 struct posix_acl *default_acl, *acl;
586 struct nfs3_createdata *data;
587 struct dentry *d_alias;
588 int status = -ENOMEM;
589
590 dprintk("NFS call mkdir %pd\n", dentry);
591
592 data = nfs3_alloc_createdata();
593 if (data == NULL)
594 goto out;
595
596 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
597 if (status)
598 goto out;
599
600 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
601 data->arg.mkdir.fh = NFS_FH(dir);
602 data->arg.mkdir.name = dentry->d_name.name;
603 data->arg.mkdir.len = dentry->d_name.len;
604 data->arg.mkdir.sattr = sattr;
605
606 d_alias = nfs3_do_create(dir, dentry, data);
607 status = PTR_ERR_OR_ZERO(d_alias);
608
609 if (status != 0)
610 goto out_release_acls;
611
612 if (d_alias)
613 dentry = d_alias;
614
615 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
616
617 dput(d_alias);
618 out_release_acls:
619 posix_acl_release(acl);
620 posix_acl_release(default_acl);
621 out:
622 nfs3_free_createdata(data);
623 dprintk("NFS reply mkdir: %d\n", status);
624 return status;
625 }
626
627 static int
628 nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
629 {
630 struct nfs_fattr *dir_attr;
631 struct nfs3_diropargs arg = {
632 .fh = NFS_FH(dir),
633 .name = name->name,
634 .len = name->len
635 };
636 struct rpc_message msg = {
637 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
638 .rpc_argp = &arg,
639 };
640 int status = -ENOMEM;
641
642 dprintk("NFS call rmdir %s\n", name->name);
643 dir_attr = nfs_alloc_fattr();
644 if (dir_attr == NULL)
645 goto out;
646
647 msg.rpc_resp = dir_attr;
648 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
649 nfs_post_op_update_inode(dir, dir_attr);
650 nfs_free_fattr(dir_attr);
651 out:
652 dprintk("NFS reply rmdir: %d\n", status);
653 return status;
654 }
655
656 /*
657 * The READDIR implementation is somewhat hackish - we pass the user buffer
658 * to the encode function, which installs it in the receive iovec.
659 * The decode function itself doesn't perform any decoding, it just makes
660 * sure the reply is syntactically correct.
661 *
662 * Also note that this implementation handles both plain readdir and
663 * readdirplus.
664 */
665 static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg,
666 struct nfs_readdir_res *nr_res)
667 {
668 struct inode *dir = d_inode(nr_arg->dentry);
669 struct nfs3_readdirargs arg = {
670 .fh = NFS_FH(dir),
671 .cookie = nr_arg->cookie,
672 .plus = nr_arg->plus,
673 .count = nr_arg->page_len,
674 .pages = nr_arg->pages
675 };
676 struct nfs3_readdirres res = {
677 .verf = nr_res->verf,
678 .plus = nr_arg->plus,
679 };
680 struct rpc_message msg = {
681 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
682 .rpc_argp = &arg,
683 .rpc_resp = &res,
684 .rpc_cred = nr_arg->cred,
685 };
686 int status = -ENOMEM;
687
688 if (nr_arg->plus)
689 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
690 if (arg.cookie)
691 memcpy(arg.verf, nr_arg->verf, sizeof(arg.verf));
692
693 dprintk("NFS call readdir%s %llu\n", nr_arg->plus ? "plus" : "",
694 (unsigned long long)nr_arg->cookie);
695
696 res.dir_attr = nfs_alloc_fattr();
697 if (res.dir_attr == NULL)
698 goto out;
699
700 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
701
702 nfs_invalidate_atime(dir);
703 nfs_refresh_inode(dir, res.dir_attr);
704
705 nfs_free_fattr(res.dir_attr);
706 out:
707 dprintk("NFS reply readdir%s: %d\n", nr_arg->plus ? "plus" : "",
708 status);
709 return status;
710 }
711
712 static int
713 nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
714 dev_t rdev)
715 {
716 struct posix_acl *default_acl, *acl;
717 struct nfs3_createdata *data;
718 struct dentry *d_alias;
719 int status = -ENOMEM;
720
721 dprintk("NFS call mknod %pd %u:%u\n", dentry,
722 MAJOR(rdev), MINOR(rdev));
723
724 data = nfs3_alloc_createdata();
725 if (data == NULL)
726 goto out;
727
728 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
729 if (status)
730 goto out;
731
732 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
733 data->arg.mknod.fh = NFS_FH(dir);
734 data->arg.mknod.name = dentry->d_name.name;
735 data->arg.mknod.len = dentry->d_name.len;
736 data->arg.mknod.sattr = sattr;
737 data->arg.mknod.rdev = rdev;
738
739 switch (sattr->ia_mode & S_IFMT) {
740 case S_IFBLK:
741 data->arg.mknod.type = NF3BLK;
742 break;
743 case S_IFCHR:
744 data->arg.mknod.type = NF3CHR;
745 break;
746 case S_IFIFO:
747 data->arg.mknod.type = NF3FIFO;
748 break;
749 case S_IFSOCK:
750 data->arg.mknod.type = NF3SOCK;
751 break;
752 default:
753 status = -EINVAL;
754 goto out_release_acls;
755 }
756
757 d_alias = nfs3_do_create(dir, dentry, data);
758 status = PTR_ERR_OR_ZERO(d_alias);
759 if (status != 0)
760 goto out_release_acls;
761
762 if (d_alias)
763 dentry = d_alias;
764
765 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
766
767 dput(d_alias);
768 out_release_acls:
769 posix_acl_release(acl);
770 posix_acl_release(default_acl);
771 out:
772 nfs3_free_createdata(data);
773 dprintk("NFS reply mknod: %d\n", status);
774 return status;
775 }
776
777 static int
778 nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
779 struct nfs_fsstat *stat)
780 {
781 struct rpc_message msg = {
782 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
783 .rpc_argp = fhandle,
784 .rpc_resp = stat,
785 };
786 int status;
787
788 dprintk("NFS call fsstat\n");
789 nfs_fattr_init(stat->fattr);
790 status = rpc_call_sync(server->client, &msg, 0);
791 dprintk("NFS reply fsstat: %d\n", status);
792 return status;
793 }
794
795 static int
796 do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
797 struct nfs_fsinfo *info)
798 {
799 struct rpc_message msg = {
800 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
801 .rpc_argp = fhandle,
802 .rpc_resp = info,
803 };
804 int status;
805
806 dprintk("NFS call fsinfo\n");
807 nfs_fattr_init(info->fattr);
808 status = rpc_call_sync(client, &msg, 0);
809 dprintk("NFS reply fsinfo: %d\n", status);
810 return status;
811 }
812
813 /*
814 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
815 * nfs_create_server
816 */
817 static int
818 nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
819 struct nfs_fsinfo *info)
820 {
821 int status;
822
823 status = do_proc_fsinfo(server->client, fhandle, info);
824 if (status && server->nfs_client->cl_rpcclient != server->client)
825 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
826 return status;
827 }
828
829 static int
830 nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
831 struct nfs_pathconf *info)
832 {
833 struct rpc_message msg = {
834 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
835 .rpc_argp = fhandle,
836 .rpc_resp = info,
837 };
838 int status;
839
840 dprintk("NFS call pathconf\n");
841 nfs_fattr_init(info->fattr);
842 status = rpc_call_sync(server->client, &msg, 0);
843 dprintk("NFS reply pathconf: %d\n", status);
844 return status;
845 }
846
847 static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
848 {
849 struct inode *inode = hdr->inode;
850 struct nfs_server *server = NFS_SERVER(inode);
851
852 if (hdr->pgio_done_cb != NULL)
853 return hdr->pgio_done_cb(task, hdr);
854
855 if (nfs3_async_handle_jukebox(task, inode))
856 return -EAGAIN;
857
858 if (task->tk_status >= 0 && !server->read_hdrsize)
859 cmpxchg(&server->read_hdrsize, 0, hdr->res.replen);
860
861 nfs_invalidate_atime(inode);
862 nfs_refresh_inode(inode, &hdr->fattr);
863 return 0;
864 }
865
866 static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
867 struct rpc_message *msg)
868 {
869 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
870 hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize;
871 }
872
873 static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
874 struct nfs_pgio_header *hdr)
875 {
876 rpc_call_start(task);
877 return 0;
878 }
879
880 static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
881 {
882 struct inode *inode = hdr->inode;
883
884 if (hdr->pgio_done_cb != NULL)
885 return hdr->pgio_done_cb(task, hdr);
886
887 if (nfs3_async_handle_jukebox(task, inode))
888 return -EAGAIN;
889 if (task->tk_status >= 0)
890 nfs_writeback_update_inode(hdr);
891 return 0;
892 }
893
894 static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
895 struct rpc_message *msg,
896 struct rpc_clnt **clnt)
897 {
898 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
899 }
900
901 static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
902 {
903 rpc_call_start(task);
904 }
905
906 static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
907 {
908 if (data->commit_done_cb != NULL)
909 return data->commit_done_cb(task, data);
910
911 if (nfs3_async_handle_jukebox(task, data->inode))
912 return -EAGAIN;
913 nfs_refresh_inode(data->inode, data->res.fattr);
914 return 0;
915 }
916
917 static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
918 struct rpc_clnt **clnt)
919 {
920 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
921 }
922
923 static void nfs3_nlm_alloc_call(void *data)
924 {
925 struct nfs_lock_context *l_ctx = data;
926 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
927 get_nfs_open_context(l_ctx->open_context);
928 nfs_get_lock_context(l_ctx->open_context);
929 }
930 }
931
932 static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
933 {
934 struct nfs_lock_context *l_ctx = data;
935 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
936 return nfs_async_iocounter_wait(task, l_ctx);
937 return false;
938
939 }
940
941 static void nfs3_nlm_release_call(void *data)
942 {
943 struct nfs_lock_context *l_ctx = data;
944 struct nfs_open_context *ctx;
945 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
946 ctx = l_ctx->open_context;
947 nfs_put_lock_context(l_ctx);
948 put_nfs_open_context(ctx);
949 }
950 }
951
952 static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
953 .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
954 .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
955 .nlmclnt_release_call = nfs3_nlm_release_call,
956 };
957
958 static int
959 nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
960 {
961 struct inode *inode = file_inode(filp);
962 struct nfs_lock_context *l_ctx = NULL;
963 struct nfs_open_context *ctx = nfs_file_open_context(filp);
964 int status;
965
966 if (fl->c.flc_flags & FL_CLOSE) {
967 l_ctx = nfs_get_lock_context(ctx);
968 if (IS_ERR(l_ctx))
969 l_ctx = NULL;
970 else
971 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
972 }
973
974 status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
975
976 if (l_ctx)
977 nfs_put_lock_context(l_ctx);
978
979 return status;
980 }
981
982 static int nfs3_have_delegation(struct inode *inode, fmode_t type, int flags)
983 {
984 return 0;
985 }
986
987 static int nfs3_return_delegation(struct inode *inode)
988 {
989 if (S_ISREG(inode->i_mode))
990 nfs_wb_all(inode);
991 return 0;
992 }
993
994 static const struct inode_operations nfs3_dir_inode_operations = {
995 .create = nfs_create,
996 .atomic_open = nfs_atomic_open_v23,
997 .lookup = nfs_lookup,
998 .link = nfs_link,
999 .unlink = nfs_unlink,
1000 .symlink = nfs_symlink,
1001 .mkdir = nfs_mkdir,
1002 .rmdir = nfs_rmdir,
1003 .mknod = nfs_mknod,
1004 .rename = nfs_rename,
1005 .permission = nfs_permission,
1006 .getattr = nfs_getattr,
1007 .setattr = nfs_setattr,
1008 #ifdef CONFIG_NFS_V3_ACL
1009 .listxattr = nfs3_listxattr,
1010 .get_inode_acl = nfs3_get_acl,
1011 .set_acl = nfs3_set_acl,
1012 #endif
1013 };
1014
1015 static const struct inode_operations nfs3_file_inode_operations = {
1016 .permission = nfs_permission,
1017 .getattr = nfs_getattr,
1018 .setattr = nfs_setattr,
1019 #ifdef CONFIG_NFS_V3_ACL
1020 .listxattr = nfs3_listxattr,
1021 .get_inode_acl = nfs3_get_acl,
1022 .set_acl = nfs3_set_acl,
1023 #endif
1024 };
1025
1026 const struct nfs_rpc_ops nfs_v3_clientops = {
1027 .version = 3, /* protocol version */
1028 .dentry_ops = &nfs_dentry_operations,
1029 .dir_inode_ops = &nfs3_dir_inode_operations,
1030 .file_inode_ops = &nfs3_file_inode_operations,
1031 .file_ops = &nfs_file_operations,
1032 .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
1033 .getroot = nfs3_proc_get_root,
1034 .submount = nfs_submount,
1035 .try_get_tree = nfs_try_get_tree,
1036 .getattr = nfs3_proc_getattr,
1037 .setattr = nfs3_proc_setattr,
1038 .lookup = nfs3_proc_lookup,
1039 .lookupp = nfs3_proc_lookupp,
1040 .access = nfs3_proc_access,
1041 .readlink = nfs3_proc_readlink,
1042 .create = nfs3_proc_create,
1043 .remove = nfs3_proc_remove,
1044 .unlink_setup = nfs3_proc_unlink_setup,
1045 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
1046 .unlink_done = nfs3_proc_unlink_done,
1047 .rename_setup = nfs3_proc_rename_setup,
1048 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
1049 .rename_done = nfs3_proc_rename_done,
1050 .link = nfs3_proc_link,
1051 .symlink = nfs3_proc_symlink,
1052 .mkdir = nfs3_proc_mkdir,
1053 .rmdir = nfs3_proc_rmdir,
1054 .readdir = nfs3_proc_readdir,
1055 .mknod = nfs3_proc_mknod,
1056 .statfs = nfs3_proc_statfs,
1057 .fsinfo = nfs3_proc_fsinfo,
1058 .pathconf = nfs3_proc_pathconf,
1059 .decode_dirent = nfs3_decode_dirent,
1060 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
1061 .read_setup = nfs3_proc_read_setup,
1062 .read_done = nfs3_read_done,
1063 .write_setup = nfs3_proc_write_setup,
1064 .write_done = nfs3_write_done,
1065 .commit_setup = nfs3_proc_commit_setup,
1066 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
1067 .commit_done = nfs3_commit_done,
1068 .lock = nfs3_proc_lock,
1069 .clear_acl_cache = forget_all_cached_acls,
1070 .close_context = nfs_close_context,
1071 .have_delegation = nfs3_have_delegation,
1072 .return_delegation = nfs3_return_delegation,
1073 .alloc_client = nfs_alloc_client,
1074 .init_client = nfs_init_client,
1075 .free_client = nfs_free_client,
1076 .create_server = nfs3_create_server,
1077 .clone_server = nfs3_clone_server,
1078 };
1079
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