Loading...
1/*
2 * linux/fs/nfs/nfs3proc.c
3 *
4 * Client-side NFSv3 procedures stubs.
5 *
6 * Copyright (C) 1997, Olaf Kirch
7 */
8
9#include <linux/mm.h>
10#include <linux/errno.h>
11#include <linux/string.h>
12#include <linux/sunrpc/clnt.h>
13#include <linux/slab.h>
14#include <linux/nfs.h>
15#include <linux/nfs3.h>
16#include <linux/nfs_fs.h>
17#include <linux/nfs_page.h>
18#include <linux/lockd/bind.h>
19#include <linux/nfs_mount.h>
20#include <linux/freezer.h>
21#include <linux/xattr.h>
22
23#include "iostat.h"
24#include "internal.h"
25#include "nfs3_fs.h"
26
27#define NFSDBG_FACILITY NFSDBG_PROC
28
29/* A wrapper to handle the EJUKEBOX error messages */
30static int
31nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
32{
33 int res;
34 do {
35 res = rpc_call_sync(clnt, msg, flags);
36 if (res != -EJUKEBOX)
37 break;
38 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
39 res = -ERESTARTSYS;
40 } while (!fatal_signal_pending(current));
41 return res;
42}
43
44#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
45
46static int
47nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
48{
49 if (task->tk_status != -EJUKEBOX)
50 return 0;
51 if (task->tk_status == -EJUKEBOX)
52 nfs_inc_stats(inode, NFSIOS_DELAY);
53 task->tk_status = 0;
54 rpc_restart_call(task);
55 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
56 return 1;
57}
58
59static int
60do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
61 struct nfs_fsinfo *info)
62{
63 struct rpc_message msg = {
64 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
65 .rpc_argp = fhandle,
66 .rpc_resp = info,
67 };
68 int status;
69
70 dprintk("%s: call fsinfo\n", __func__);
71 nfs_fattr_init(info->fattr);
72 status = rpc_call_sync(client, &msg, 0);
73 dprintk("%s: reply fsinfo: %d\n", __func__, status);
74 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
75 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
76 msg.rpc_resp = info->fattr;
77 status = rpc_call_sync(client, &msg, 0);
78 dprintk("%s: reply getattr: %d\n", __func__, status);
79 }
80 return status;
81}
82
83/*
84 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
85 */
86static int
87nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
88 struct nfs_fsinfo *info)
89{
90 int status;
91
92 status = do_proc_get_root(server->client, fhandle, info);
93 if (status && server->nfs_client->cl_rpcclient != server->client)
94 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
95 return status;
96}
97
98/*
99 * One function for each procedure in the NFS protocol.
100 */
101static int
102nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
103 struct nfs_fattr *fattr, struct nfs4_label *label)
104{
105 struct rpc_message msg = {
106 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
107 .rpc_argp = fhandle,
108 .rpc_resp = fattr,
109 };
110 int status;
111
112 dprintk("NFS call getattr\n");
113 nfs_fattr_init(fattr);
114 status = rpc_call_sync(server->client, &msg, 0);
115 dprintk("NFS reply getattr: %d\n", status);
116 return status;
117}
118
119static int
120nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
121 struct iattr *sattr)
122{
123 struct inode *inode = d_inode(dentry);
124 struct nfs3_sattrargs arg = {
125 .fh = NFS_FH(inode),
126 .sattr = sattr,
127 };
128 struct rpc_message msg = {
129 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
130 .rpc_argp = &arg,
131 .rpc_resp = fattr,
132 };
133 int status;
134
135 dprintk("NFS call setattr\n");
136 if (sattr->ia_valid & ATTR_FILE)
137 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
138 nfs_fattr_init(fattr);
139 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
140 if (status == 0)
141 nfs_setattr_update_inode(inode, sattr, fattr);
142 dprintk("NFS reply setattr: %d\n", status);
143 return status;
144}
145
146static int
147nfs3_proc_lookup(struct inode *dir, struct qstr *name,
148 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
149 struct nfs4_label *label)
150{
151 struct nfs3_diropargs arg = {
152 .fh = NFS_FH(dir),
153 .name = name->name,
154 .len = name->len
155 };
156 struct nfs3_diropres res = {
157 .fh = fhandle,
158 .fattr = fattr
159 };
160 struct rpc_message msg = {
161 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
162 .rpc_argp = &arg,
163 .rpc_resp = &res,
164 };
165 int status;
166
167 dprintk("NFS call lookup %s\n", name->name);
168 res.dir_attr = nfs_alloc_fattr();
169 if (res.dir_attr == NULL)
170 return -ENOMEM;
171
172 nfs_fattr_init(fattr);
173 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
174 nfs_refresh_inode(dir, res.dir_attr);
175 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
176 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
177 msg.rpc_argp = fhandle;
178 msg.rpc_resp = fattr;
179 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
180 }
181 nfs_free_fattr(res.dir_attr);
182 dprintk("NFS reply lookup: %d\n", status);
183 return status;
184}
185
186static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
187{
188 struct nfs3_accessargs arg = {
189 .fh = NFS_FH(inode),
190 };
191 struct nfs3_accessres res;
192 struct rpc_message msg = {
193 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
194 .rpc_argp = &arg,
195 .rpc_resp = &res,
196 .rpc_cred = entry->cred,
197 };
198 int mode = entry->mask;
199 int status = -ENOMEM;
200
201 dprintk("NFS call access\n");
202
203 if (mode & MAY_READ)
204 arg.access |= NFS3_ACCESS_READ;
205 if (S_ISDIR(inode->i_mode)) {
206 if (mode & MAY_WRITE)
207 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
208 if (mode & MAY_EXEC)
209 arg.access |= NFS3_ACCESS_LOOKUP;
210 } else {
211 if (mode & MAY_WRITE)
212 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
213 if (mode & MAY_EXEC)
214 arg.access |= NFS3_ACCESS_EXECUTE;
215 }
216
217 res.fattr = nfs_alloc_fattr();
218 if (res.fattr == NULL)
219 goto out;
220
221 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
222 nfs_refresh_inode(inode, res.fattr);
223 if (status == 0) {
224 entry->mask = 0;
225 if (res.access & NFS3_ACCESS_READ)
226 entry->mask |= MAY_READ;
227 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
228 entry->mask |= MAY_WRITE;
229 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
230 entry->mask |= MAY_EXEC;
231 }
232 nfs_free_fattr(res.fattr);
233out:
234 dprintk("NFS reply access: %d\n", status);
235 return status;
236}
237
238static int nfs3_proc_readlink(struct inode *inode, struct page *page,
239 unsigned int pgbase, unsigned int pglen)
240{
241 struct nfs_fattr *fattr;
242 struct nfs3_readlinkargs args = {
243 .fh = NFS_FH(inode),
244 .pgbase = pgbase,
245 .pglen = pglen,
246 .pages = &page
247 };
248 struct rpc_message msg = {
249 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
250 .rpc_argp = &args,
251 };
252 int status = -ENOMEM;
253
254 dprintk("NFS call readlink\n");
255 fattr = nfs_alloc_fattr();
256 if (fattr == NULL)
257 goto out;
258 msg.rpc_resp = fattr;
259
260 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
261 nfs_refresh_inode(inode, fattr);
262 nfs_free_fattr(fattr);
263out:
264 dprintk("NFS reply readlink: %d\n", status);
265 return status;
266}
267
268struct nfs3_createdata {
269 struct rpc_message msg;
270 union {
271 struct nfs3_createargs create;
272 struct nfs3_mkdirargs mkdir;
273 struct nfs3_symlinkargs symlink;
274 struct nfs3_mknodargs mknod;
275 } arg;
276 struct nfs3_diropres res;
277 struct nfs_fh fh;
278 struct nfs_fattr fattr;
279 struct nfs_fattr dir_attr;
280};
281
282static struct nfs3_createdata *nfs3_alloc_createdata(void)
283{
284 struct nfs3_createdata *data;
285
286 data = kzalloc(sizeof(*data), GFP_KERNEL);
287 if (data != NULL) {
288 data->msg.rpc_argp = &data->arg;
289 data->msg.rpc_resp = &data->res;
290 data->res.fh = &data->fh;
291 data->res.fattr = &data->fattr;
292 data->res.dir_attr = &data->dir_attr;
293 nfs_fattr_init(data->res.fattr);
294 nfs_fattr_init(data->res.dir_attr);
295 }
296 return data;
297}
298
299static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
300{
301 int status;
302
303 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
304 nfs_post_op_update_inode(dir, data->res.dir_attr);
305 if (status == 0)
306 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
307 return status;
308}
309
310static void nfs3_free_createdata(struct nfs3_createdata *data)
311{
312 kfree(data);
313}
314
315/*
316 * Create a regular file.
317 */
318static int
319nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
320 int flags)
321{
322 struct posix_acl *default_acl, *acl;
323 struct nfs3_createdata *data;
324 int status = -ENOMEM;
325
326 dprintk("NFS call create %pd\n", dentry);
327
328 data = nfs3_alloc_createdata();
329 if (data == NULL)
330 goto out;
331
332 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
333 data->arg.create.fh = NFS_FH(dir);
334 data->arg.create.name = dentry->d_name.name;
335 data->arg.create.len = dentry->d_name.len;
336 data->arg.create.sattr = sattr;
337
338 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
339 if (flags & O_EXCL) {
340 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
341 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
342 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
343 }
344
345 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
346 if (status)
347 goto out;
348
349 for (;;) {
350 status = nfs3_do_create(dir, dentry, data);
351
352 if (status != -ENOTSUPP)
353 break;
354 /* If the server doesn't support the exclusive creation
355 * semantics, try again with simple 'guarded' mode. */
356 switch (data->arg.create.createmode) {
357 case NFS3_CREATE_EXCLUSIVE:
358 data->arg.create.createmode = NFS3_CREATE_GUARDED;
359 break;
360
361 case NFS3_CREATE_GUARDED:
362 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
363 break;
364
365 case NFS3_CREATE_UNCHECKED:
366 goto out;
367 }
368 nfs_fattr_init(data->res.dir_attr);
369 nfs_fattr_init(data->res.fattr);
370 }
371
372 if (status != 0)
373 goto out_release_acls;
374
375 /* When we created the file with exclusive semantics, make
376 * sure we set the attributes afterwards. */
377 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
378 dprintk("NFS call setattr (post-create)\n");
379
380 if (!(sattr->ia_valid & ATTR_ATIME_SET))
381 sattr->ia_valid |= ATTR_ATIME;
382 if (!(sattr->ia_valid & ATTR_MTIME_SET))
383 sattr->ia_valid |= ATTR_MTIME;
384
385 /* Note: we could use a guarded setattr here, but I'm
386 * not sure this buys us anything (and I'd have
387 * to revamp the NFSv3 XDR code) */
388 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
389 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
390 dprintk("NFS reply setattr (post-create): %d\n", status);
391 if (status != 0)
392 goto out_release_acls;
393 }
394
395 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
396
397out_release_acls:
398 posix_acl_release(acl);
399 posix_acl_release(default_acl);
400out:
401 nfs3_free_createdata(data);
402 dprintk("NFS reply create: %d\n", status);
403 return status;
404}
405
406static int
407nfs3_proc_remove(struct inode *dir, struct qstr *name)
408{
409 struct nfs_removeargs arg = {
410 .fh = NFS_FH(dir),
411 .name = *name,
412 };
413 struct nfs_removeres res;
414 struct rpc_message msg = {
415 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
416 .rpc_argp = &arg,
417 .rpc_resp = &res,
418 };
419 int status = -ENOMEM;
420
421 dprintk("NFS call remove %s\n", name->name);
422 res.dir_attr = nfs_alloc_fattr();
423 if (res.dir_attr == NULL)
424 goto out;
425
426 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
427 nfs_post_op_update_inode(dir, res.dir_attr);
428 nfs_free_fattr(res.dir_attr);
429out:
430 dprintk("NFS reply remove: %d\n", status);
431 return status;
432}
433
434static void
435nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
436{
437 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
438}
439
440static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
441{
442 rpc_call_start(task);
443}
444
445static int
446nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
447{
448 struct nfs_removeres *res;
449 if (nfs3_async_handle_jukebox(task, dir))
450 return 0;
451 res = task->tk_msg.rpc_resp;
452 nfs_post_op_update_inode(dir, res->dir_attr);
453 return 1;
454}
455
456static void
457nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
458{
459 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
460}
461
462static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
463{
464 rpc_call_start(task);
465}
466
467static int
468nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
469 struct inode *new_dir)
470{
471 struct nfs_renameres *res;
472
473 if (nfs3_async_handle_jukebox(task, old_dir))
474 return 0;
475 res = task->tk_msg.rpc_resp;
476
477 nfs_post_op_update_inode(old_dir, res->old_fattr);
478 nfs_post_op_update_inode(new_dir, res->new_fattr);
479 return 1;
480}
481
482static int
483nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
484{
485 struct nfs3_linkargs arg = {
486 .fromfh = NFS_FH(inode),
487 .tofh = NFS_FH(dir),
488 .toname = name->name,
489 .tolen = name->len
490 };
491 struct nfs3_linkres res;
492 struct rpc_message msg = {
493 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
494 .rpc_argp = &arg,
495 .rpc_resp = &res,
496 };
497 int status = -ENOMEM;
498
499 dprintk("NFS call link %s\n", name->name);
500 res.fattr = nfs_alloc_fattr();
501 res.dir_attr = nfs_alloc_fattr();
502 if (res.fattr == NULL || res.dir_attr == NULL)
503 goto out;
504
505 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
506 nfs_post_op_update_inode(dir, res.dir_attr);
507 nfs_post_op_update_inode(inode, res.fattr);
508out:
509 nfs_free_fattr(res.dir_attr);
510 nfs_free_fattr(res.fattr);
511 dprintk("NFS reply link: %d\n", status);
512 return status;
513}
514
515static int
516nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
517 unsigned int len, struct iattr *sattr)
518{
519 struct nfs3_createdata *data;
520 int status = -ENOMEM;
521
522 if (len > NFS3_MAXPATHLEN)
523 return -ENAMETOOLONG;
524
525 dprintk("NFS call symlink %pd\n", dentry);
526
527 data = nfs3_alloc_createdata();
528 if (data == NULL)
529 goto out;
530 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
531 data->arg.symlink.fromfh = NFS_FH(dir);
532 data->arg.symlink.fromname = dentry->d_name.name;
533 data->arg.symlink.fromlen = dentry->d_name.len;
534 data->arg.symlink.pages = &page;
535 data->arg.symlink.pathlen = len;
536 data->arg.symlink.sattr = sattr;
537
538 status = nfs3_do_create(dir, dentry, data);
539
540 nfs3_free_createdata(data);
541out:
542 dprintk("NFS reply symlink: %d\n", status);
543 return status;
544}
545
546static int
547nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
548{
549 struct posix_acl *default_acl, *acl;
550 struct nfs3_createdata *data;
551 int status = -ENOMEM;
552
553 dprintk("NFS call mkdir %pd\n", dentry);
554
555 data = nfs3_alloc_createdata();
556 if (data == NULL)
557 goto out;
558
559 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
560 if (status)
561 goto out;
562
563 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
564 data->arg.mkdir.fh = NFS_FH(dir);
565 data->arg.mkdir.name = dentry->d_name.name;
566 data->arg.mkdir.len = dentry->d_name.len;
567 data->arg.mkdir.sattr = sattr;
568
569 status = nfs3_do_create(dir, dentry, data);
570 if (status != 0)
571 goto out_release_acls;
572
573 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
574
575out_release_acls:
576 posix_acl_release(acl);
577 posix_acl_release(default_acl);
578out:
579 nfs3_free_createdata(data);
580 dprintk("NFS reply mkdir: %d\n", status);
581 return status;
582}
583
584static int
585nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
586{
587 struct nfs_fattr *dir_attr;
588 struct nfs3_diropargs arg = {
589 .fh = NFS_FH(dir),
590 .name = name->name,
591 .len = name->len
592 };
593 struct rpc_message msg = {
594 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
595 .rpc_argp = &arg,
596 };
597 int status = -ENOMEM;
598
599 dprintk("NFS call rmdir %s\n", name->name);
600 dir_attr = nfs_alloc_fattr();
601 if (dir_attr == NULL)
602 goto out;
603
604 msg.rpc_resp = dir_attr;
605 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
606 nfs_post_op_update_inode(dir, dir_attr);
607 nfs_free_fattr(dir_attr);
608out:
609 dprintk("NFS reply rmdir: %d\n", status);
610 return status;
611}
612
613/*
614 * The READDIR implementation is somewhat hackish - we pass the user buffer
615 * to the encode function, which installs it in the receive iovec.
616 * The decode function itself doesn't perform any decoding, it just makes
617 * sure the reply is syntactically correct.
618 *
619 * Also note that this implementation handles both plain readdir and
620 * readdirplus.
621 */
622static int
623nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
624 u64 cookie, struct page **pages, unsigned int count, int plus)
625{
626 struct inode *dir = d_inode(dentry);
627 __be32 *verf = NFS_I(dir)->cookieverf;
628 struct nfs3_readdirargs arg = {
629 .fh = NFS_FH(dir),
630 .cookie = cookie,
631 .verf = {verf[0], verf[1]},
632 .plus = plus,
633 .count = count,
634 .pages = pages
635 };
636 struct nfs3_readdirres res = {
637 .verf = verf,
638 .plus = plus
639 };
640 struct rpc_message msg = {
641 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
642 .rpc_argp = &arg,
643 .rpc_resp = &res,
644 .rpc_cred = cred
645 };
646 int status = -ENOMEM;
647
648 if (plus)
649 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
650
651 dprintk("NFS call readdir%s %d\n",
652 plus? "plus" : "", (unsigned int) cookie);
653
654 res.dir_attr = nfs_alloc_fattr();
655 if (res.dir_attr == NULL)
656 goto out;
657
658 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
659
660 nfs_invalidate_atime(dir);
661 nfs_refresh_inode(dir, res.dir_attr);
662
663 nfs_free_fattr(res.dir_attr);
664out:
665 dprintk("NFS reply readdir%s: %d\n",
666 plus? "plus" : "", status);
667 return status;
668}
669
670static int
671nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
672 dev_t rdev)
673{
674 struct posix_acl *default_acl, *acl;
675 struct nfs3_createdata *data;
676 int status = -ENOMEM;
677
678 dprintk("NFS call mknod %pd %u:%u\n", dentry,
679 MAJOR(rdev), MINOR(rdev));
680
681 data = nfs3_alloc_createdata();
682 if (data == NULL)
683 goto out;
684
685 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
686 if (status)
687 goto out;
688
689 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
690 data->arg.mknod.fh = NFS_FH(dir);
691 data->arg.mknod.name = dentry->d_name.name;
692 data->arg.mknod.len = dentry->d_name.len;
693 data->arg.mknod.sattr = sattr;
694 data->arg.mknod.rdev = rdev;
695
696 switch (sattr->ia_mode & S_IFMT) {
697 case S_IFBLK:
698 data->arg.mknod.type = NF3BLK;
699 break;
700 case S_IFCHR:
701 data->arg.mknod.type = NF3CHR;
702 break;
703 case S_IFIFO:
704 data->arg.mknod.type = NF3FIFO;
705 break;
706 case S_IFSOCK:
707 data->arg.mknod.type = NF3SOCK;
708 break;
709 default:
710 status = -EINVAL;
711 goto out;
712 }
713
714 status = nfs3_do_create(dir, dentry, data);
715 if (status != 0)
716 goto out_release_acls;
717
718 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
719
720out_release_acls:
721 posix_acl_release(acl);
722 posix_acl_release(default_acl);
723out:
724 nfs3_free_createdata(data);
725 dprintk("NFS reply mknod: %d\n", status);
726 return status;
727}
728
729static int
730nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
731 struct nfs_fsstat *stat)
732{
733 struct rpc_message msg = {
734 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
735 .rpc_argp = fhandle,
736 .rpc_resp = stat,
737 };
738 int status;
739
740 dprintk("NFS call fsstat\n");
741 nfs_fattr_init(stat->fattr);
742 status = rpc_call_sync(server->client, &msg, 0);
743 dprintk("NFS reply fsstat: %d\n", status);
744 return status;
745}
746
747static int
748do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
749 struct nfs_fsinfo *info)
750{
751 struct rpc_message msg = {
752 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
753 .rpc_argp = fhandle,
754 .rpc_resp = info,
755 };
756 int status;
757
758 dprintk("NFS call fsinfo\n");
759 nfs_fattr_init(info->fattr);
760 status = rpc_call_sync(client, &msg, 0);
761 dprintk("NFS reply fsinfo: %d\n", status);
762 return status;
763}
764
765/*
766 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
767 * nfs_create_server
768 */
769static int
770nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
771 struct nfs_fsinfo *info)
772{
773 int status;
774
775 status = do_proc_fsinfo(server->client, fhandle, info);
776 if (status && server->nfs_client->cl_rpcclient != server->client)
777 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
778 return status;
779}
780
781static int
782nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
783 struct nfs_pathconf *info)
784{
785 struct rpc_message msg = {
786 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
787 .rpc_argp = fhandle,
788 .rpc_resp = info,
789 };
790 int status;
791
792 dprintk("NFS call pathconf\n");
793 nfs_fattr_init(info->fattr);
794 status = rpc_call_sync(server->client, &msg, 0);
795 dprintk("NFS reply pathconf: %d\n", status);
796 return status;
797}
798
799static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
800{
801 struct inode *inode = hdr->inode;
802
803 if (hdr->pgio_done_cb != NULL)
804 return hdr->pgio_done_cb(task, hdr);
805
806 if (nfs3_async_handle_jukebox(task, inode))
807 return -EAGAIN;
808
809 nfs_invalidate_atime(inode);
810 nfs_refresh_inode(inode, &hdr->fattr);
811 return 0;
812}
813
814static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
815 struct rpc_message *msg)
816{
817 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
818}
819
820static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
821 struct nfs_pgio_header *hdr)
822{
823 rpc_call_start(task);
824 return 0;
825}
826
827static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
828{
829 struct inode *inode = hdr->inode;
830
831 if (hdr->pgio_done_cb != NULL)
832 return hdr->pgio_done_cb(task, hdr);
833
834 if (nfs3_async_handle_jukebox(task, inode))
835 return -EAGAIN;
836 if (task->tk_status >= 0)
837 nfs_writeback_update_inode(hdr);
838 return 0;
839}
840
841static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
842 struct rpc_message *msg)
843{
844 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
845}
846
847static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
848{
849 rpc_call_start(task);
850}
851
852static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
853{
854 if (data->commit_done_cb != NULL)
855 return data->commit_done_cb(task, data);
856
857 if (nfs3_async_handle_jukebox(task, data->inode))
858 return -EAGAIN;
859 nfs_refresh_inode(data->inode, data->res.fattr);
860 return 0;
861}
862
863static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
864{
865 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
866}
867
868static int
869nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
870{
871 struct inode *inode = file_inode(filp);
872
873 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
874}
875
876static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
877{
878 return 0;
879}
880
881static int nfs3_return_delegation(struct inode *inode)
882{
883 nfs_wb_all(inode);
884 return 0;
885}
886
887static const struct inode_operations nfs3_dir_inode_operations = {
888 .create = nfs_create,
889 .lookup = nfs_lookup,
890 .link = nfs_link,
891 .unlink = nfs_unlink,
892 .symlink = nfs_symlink,
893 .mkdir = nfs_mkdir,
894 .rmdir = nfs_rmdir,
895 .mknod = nfs_mknod,
896 .rename = nfs_rename,
897 .permission = nfs_permission,
898 .getattr = nfs_getattr,
899 .setattr = nfs_setattr,
900#ifdef CONFIG_NFS_V3_ACL
901 .listxattr = nfs3_listxattr,
902 .getxattr = generic_getxattr,
903 .setxattr = generic_setxattr,
904 .removexattr = generic_removexattr,
905 .get_acl = nfs3_get_acl,
906 .set_acl = nfs3_set_acl,
907#endif
908};
909
910static const struct inode_operations nfs3_file_inode_operations = {
911 .permission = nfs_permission,
912 .getattr = nfs_getattr,
913 .setattr = nfs_setattr,
914#ifdef CONFIG_NFS_V3_ACL
915 .listxattr = nfs3_listxattr,
916 .getxattr = generic_getxattr,
917 .setxattr = generic_setxattr,
918 .removexattr = generic_removexattr,
919 .get_acl = nfs3_get_acl,
920 .set_acl = nfs3_set_acl,
921#endif
922};
923
924const struct nfs_rpc_ops nfs_v3_clientops = {
925 .version = 3, /* protocol version */
926 .dentry_ops = &nfs_dentry_operations,
927 .dir_inode_ops = &nfs3_dir_inode_operations,
928 .file_inode_ops = &nfs3_file_inode_operations,
929 .file_ops = &nfs_file_operations,
930 .getroot = nfs3_proc_get_root,
931 .submount = nfs_submount,
932 .try_mount = nfs_try_mount,
933 .getattr = nfs3_proc_getattr,
934 .setattr = nfs3_proc_setattr,
935 .lookup = nfs3_proc_lookup,
936 .access = nfs3_proc_access,
937 .readlink = nfs3_proc_readlink,
938 .create = nfs3_proc_create,
939 .remove = nfs3_proc_remove,
940 .unlink_setup = nfs3_proc_unlink_setup,
941 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
942 .unlink_done = nfs3_proc_unlink_done,
943 .rename_setup = nfs3_proc_rename_setup,
944 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
945 .rename_done = nfs3_proc_rename_done,
946 .link = nfs3_proc_link,
947 .symlink = nfs3_proc_symlink,
948 .mkdir = nfs3_proc_mkdir,
949 .rmdir = nfs3_proc_rmdir,
950 .readdir = nfs3_proc_readdir,
951 .mknod = nfs3_proc_mknod,
952 .statfs = nfs3_proc_statfs,
953 .fsinfo = nfs3_proc_fsinfo,
954 .pathconf = nfs3_proc_pathconf,
955 .decode_dirent = nfs3_decode_dirent,
956 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
957 .read_setup = nfs3_proc_read_setup,
958 .read_done = nfs3_read_done,
959 .write_setup = nfs3_proc_write_setup,
960 .write_done = nfs3_write_done,
961 .commit_setup = nfs3_proc_commit_setup,
962 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
963 .commit_done = nfs3_commit_done,
964 .lock = nfs3_proc_lock,
965 .clear_acl_cache = forget_all_cached_acls,
966 .close_context = nfs_close_context,
967 .have_delegation = nfs3_have_delegation,
968 .return_delegation = nfs3_return_delegation,
969 .alloc_client = nfs_alloc_client,
970 .init_client = nfs_init_client,
971 .free_client = nfs_free_client,
972 .create_server = nfs3_create_server,
973 .clone_server = nfs3_clone_server,
974};
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 */
31static int
32nfs3_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
48static int
49nfs3_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
60static int
61do_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 */
87static int
88nfs3_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 */
102static int
103nfs3_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
125static int
126nfs3_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
155static 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
194static int
195nfs3_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
210static 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
224static 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);
250out:
251 dprintk("NFS reply access: %d\n", status);
252 return status;
253}
254
255static 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);
280out:
281 dprintk("NFS reply readlink: %d\n", status);
282 return status;
283}
284
285struct 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
299static 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
316static struct dentry *
317nfs3_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
329static void nfs3_free_createdata(struct nfs3_createdata *data)
330{
331 kfree(data);
332}
333
334/*
335 * Create a regular file.
336 */
337static int
338nfs3_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
421out_dput:
422 dput(d_alias);
423out_release_acls:
424 posix_acl_release(acl);
425 posix_acl_release(default_acl);
426out:
427 nfs3_free_createdata(data);
428 dprintk("NFS reply create: %d\n", status);
429 return status;
430}
431
432static int
433nfs3_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);
455out:
456 dprintk("NFS reply remove: %d\n", status);
457 return status;
458}
459
460static void
461nfs3_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
468static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
469{
470 rpc_call_start(task);
471}
472
473static int
474nfs3_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
484static void
485nfs3_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
492static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
493{
494 rpc_call_start(task);
495}
496
497static int
498nfs3_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
512static int
513nfs3_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);
538out:
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
545static int
546nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
547 unsigned int len, struct iattr *sattr)
548{
549 struct nfs3_createdata *data;
550 struct dentry *d_alias;
551 int status = -ENOMEM;
552
553 if (len > NFS3_MAXPATHLEN)
554 return -ENAMETOOLONG;
555
556 dprintk("NFS call symlink %pd\n", dentry);
557
558 data = nfs3_alloc_createdata();
559 if (data == NULL)
560 goto out;
561 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
562 data->arg.symlink.fromfh = NFS_FH(dir);
563 data->arg.symlink.fromname = dentry->d_name.name;
564 data->arg.symlink.fromlen = dentry->d_name.len;
565 data->arg.symlink.pages = &page;
566 data->arg.symlink.pathlen = len;
567 data->arg.symlink.sattr = sattr;
568
569 d_alias = nfs3_do_create(dir, dentry, data);
570 status = PTR_ERR_OR_ZERO(d_alias);
571
572 if (status == 0)
573 dput(d_alias);
574
575 nfs3_free_createdata(data);
576out:
577 dprintk("NFS reply symlink: %d\n", status);
578 return status;
579}
580
581static int
582nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
583{
584 struct posix_acl *default_acl, *acl;
585 struct nfs3_createdata *data;
586 struct dentry *d_alias;
587 int status = -ENOMEM;
588
589 dprintk("NFS call mkdir %pd\n", dentry);
590
591 data = nfs3_alloc_createdata();
592 if (data == NULL)
593 goto out;
594
595 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
596 if (status)
597 goto out;
598
599 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
600 data->arg.mkdir.fh = NFS_FH(dir);
601 data->arg.mkdir.name = dentry->d_name.name;
602 data->arg.mkdir.len = dentry->d_name.len;
603 data->arg.mkdir.sattr = sattr;
604
605 d_alias = nfs3_do_create(dir, dentry, data);
606 status = PTR_ERR_OR_ZERO(d_alias);
607
608 if (status != 0)
609 goto out_release_acls;
610
611 if (d_alias)
612 dentry = d_alias;
613
614 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
615
616 dput(d_alias);
617out_release_acls:
618 posix_acl_release(acl);
619 posix_acl_release(default_acl);
620out:
621 nfs3_free_createdata(data);
622 dprintk("NFS reply mkdir: %d\n", status);
623 return status;
624}
625
626static int
627nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
628{
629 struct nfs_fattr *dir_attr;
630 struct nfs3_diropargs arg = {
631 .fh = NFS_FH(dir),
632 .name = name->name,
633 .len = name->len
634 };
635 struct rpc_message msg = {
636 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
637 .rpc_argp = &arg,
638 };
639 int status = -ENOMEM;
640
641 dprintk("NFS call rmdir %s\n", name->name);
642 dir_attr = nfs_alloc_fattr();
643 if (dir_attr == NULL)
644 goto out;
645
646 msg.rpc_resp = dir_attr;
647 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
648 nfs_post_op_update_inode(dir, dir_attr);
649 nfs_free_fattr(dir_attr);
650out:
651 dprintk("NFS reply rmdir: %d\n", status);
652 return status;
653}
654
655/*
656 * The READDIR implementation is somewhat hackish - we pass the user buffer
657 * to the encode function, which installs it in the receive iovec.
658 * The decode function itself doesn't perform any decoding, it just makes
659 * sure the reply is syntactically correct.
660 *
661 * Also note that this implementation handles both plain readdir and
662 * readdirplus.
663 */
664static int nfs3_proc_readdir(struct nfs_readdir_arg *nr_arg,
665 struct nfs_readdir_res *nr_res)
666{
667 struct inode *dir = d_inode(nr_arg->dentry);
668 struct nfs3_readdirargs arg = {
669 .fh = NFS_FH(dir),
670 .cookie = nr_arg->cookie,
671 .plus = nr_arg->plus,
672 .count = nr_arg->page_len,
673 .pages = nr_arg->pages
674 };
675 struct nfs3_readdirres res = {
676 .verf = nr_res->verf,
677 .plus = nr_arg->plus,
678 };
679 struct rpc_message msg = {
680 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
681 .rpc_argp = &arg,
682 .rpc_resp = &res,
683 .rpc_cred = nr_arg->cred,
684 };
685 int status = -ENOMEM;
686
687 if (nr_arg->plus)
688 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
689 if (arg.cookie)
690 memcpy(arg.verf, nr_arg->verf, sizeof(arg.verf));
691
692 dprintk("NFS call readdir%s %llu\n", nr_arg->plus ? "plus" : "",
693 (unsigned long long)nr_arg->cookie);
694
695 res.dir_attr = nfs_alloc_fattr();
696 if (res.dir_attr == NULL)
697 goto out;
698
699 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
700
701 nfs_invalidate_atime(dir);
702 nfs_refresh_inode(dir, res.dir_attr);
703
704 nfs_free_fattr(res.dir_attr);
705out:
706 dprintk("NFS reply readdir%s: %d\n", nr_arg->plus ? "plus" : "",
707 status);
708 return status;
709}
710
711static int
712nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
713 dev_t rdev)
714{
715 struct posix_acl *default_acl, *acl;
716 struct nfs3_createdata *data;
717 struct dentry *d_alias;
718 int status = -ENOMEM;
719
720 dprintk("NFS call mknod %pd %u:%u\n", dentry,
721 MAJOR(rdev), MINOR(rdev));
722
723 data = nfs3_alloc_createdata();
724 if (data == NULL)
725 goto out;
726
727 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
728 if (status)
729 goto out;
730
731 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
732 data->arg.mknod.fh = NFS_FH(dir);
733 data->arg.mknod.name = dentry->d_name.name;
734 data->arg.mknod.len = dentry->d_name.len;
735 data->arg.mknod.sattr = sattr;
736 data->arg.mknod.rdev = rdev;
737
738 switch (sattr->ia_mode & S_IFMT) {
739 case S_IFBLK:
740 data->arg.mknod.type = NF3BLK;
741 break;
742 case S_IFCHR:
743 data->arg.mknod.type = NF3CHR;
744 break;
745 case S_IFIFO:
746 data->arg.mknod.type = NF3FIFO;
747 break;
748 case S_IFSOCK:
749 data->arg.mknod.type = NF3SOCK;
750 break;
751 default:
752 status = -EINVAL;
753 goto out_release_acls;
754 }
755
756 d_alias = nfs3_do_create(dir, dentry, data);
757 status = PTR_ERR_OR_ZERO(d_alias);
758 if (status != 0)
759 goto out_release_acls;
760
761 if (d_alias)
762 dentry = d_alias;
763
764 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
765
766 dput(d_alias);
767out_release_acls:
768 posix_acl_release(acl);
769 posix_acl_release(default_acl);
770out:
771 nfs3_free_createdata(data);
772 dprintk("NFS reply mknod: %d\n", status);
773 return status;
774}
775
776static int
777nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
778 struct nfs_fsstat *stat)
779{
780 struct rpc_message msg = {
781 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
782 .rpc_argp = fhandle,
783 .rpc_resp = stat,
784 };
785 int status;
786
787 dprintk("NFS call fsstat\n");
788 nfs_fattr_init(stat->fattr);
789 status = rpc_call_sync(server->client, &msg, 0);
790 dprintk("NFS reply fsstat: %d\n", status);
791 return status;
792}
793
794static int
795do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
796 struct nfs_fsinfo *info)
797{
798 struct rpc_message msg = {
799 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
800 .rpc_argp = fhandle,
801 .rpc_resp = info,
802 };
803 int status;
804
805 dprintk("NFS call fsinfo\n");
806 nfs_fattr_init(info->fattr);
807 status = rpc_call_sync(client, &msg, 0);
808 dprintk("NFS reply fsinfo: %d\n", status);
809 return status;
810}
811
812/*
813 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
814 * nfs_create_server
815 */
816static int
817nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
818 struct nfs_fsinfo *info)
819{
820 int status;
821
822 status = do_proc_fsinfo(server->client, fhandle, info);
823 if (status && server->nfs_client->cl_rpcclient != server->client)
824 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
825 return status;
826}
827
828static int
829nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
830 struct nfs_pathconf *info)
831{
832 struct rpc_message msg = {
833 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
834 .rpc_argp = fhandle,
835 .rpc_resp = info,
836 };
837 int status;
838
839 dprintk("NFS call pathconf\n");
840 nfs_fattr_init(info->fattr);
841 status = rpc_call_sync(server->client, &msg, 0);
842 dprintk("NFS reply pathconf: %d\n", status);
843 return status;
844}
845
846static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
847{
848 struct inode *inode = hdr->inode;
849 struct nfs_server *server = NFS_SERVER(inode);
850
851 if (hdr->pgio_done_cb != NULL)
852 return hdr->pgio_done_cb(task, hdr);
853
854 if (nfs3_async_handle_jukebox(task, inode))
855 return -EAGAIN;
856
857 if (task->tk_status >= 0 && !server->read_hdrsize)
858 cmpxchg(&server->read_hdrsize, 0, hdr->res.replen);
859
860 nfs_invalidate_atime(inode);
861 nfs_refresh_inode(inode, &hdr->fattr);
862 return 0;
863}
864
865static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
866 struct rpc_message *msg)
867{
868 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
869 hdr->args.replen = NFS_SERVER(hdr->inode)->read_hdrsize;
870}
871
872static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
873 struct nfs_pgio_header *hdr)
874{
875 rpc_call_start(task);
876 return 0;
877}
878
879static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
880{
881 struct inode *inode = hdr->inode;
882
883 if (hdr->pgio_done_cb != NULL)
884 return hdr->pgio_done_cb(task, hdr);
885
886 if (nfs3_async_handle_jukebox(task, inode))
887 return -EAGAIN;
888 if (task->tk_status >= 0)
889 nfs_writeback_update_inode(hdr);
890 return 0;
891}
892
893static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
894 struct rpc_message *msg,
895 struct rpc_clnt **clnt)
896{
897 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
898}
899
900static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
901{
902 rpc_call_start(task);
903}
904
905static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
906{
907 if (data->commit_done_cb != NULL)
908 return data->commit_done_cb(task, data);
909
910 if (nfs3_async_handle_jukebox(task, data->inode))
911 return -EAGAIN;
912 nfs_refresh_inode(data->inode, data->res.fattr);
913 return 0;
914}
915
916static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg,
917 struct rpc_clnt **clnt)
918{
919 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
920}
921
922static void nfs3_nlm_alloc_call(void *data)
923{
924 struct nfs_lock_context *l_ctx = data;
925 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
926 get_nfs_open_context(l_ctx->open_context);
927 nfs_get_lock_context(l_ctx->open_context);
928 }
929}
930
931static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
932{
933 struct nfs_lock_context *l_ctx = data;
934 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
935 return nfs_async_iocounter_wait(task, l_ctx);
936 return false;
937
938}
939
940static void nfs3_nlm_release_call(void *data)
941{
942 struct nfs_lock_context *l_ctx = data;
943 struct nfs_open_context *ctx;
944 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
945 ctx = l_ctx->open_context;
946 nfs_put_lock_context(l_ctx);
947 put_nfs_open_context(ctx);
948 }
949}
950
951static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
952 .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
953 .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
954 .nlmclnt_release_call = nfs3_nlm_release_call,
955};
956
957static int
958nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
959{
960 struct inode *inode = file_inode(filp);
961 struct nfs_lock_context *l_ctx = NULL;
962 struct nfs_open_context *ctx = nfs_file_open_context(filp);
963 int status;
964
965 if (fl->fl_flags & FL_CLOSE) {
966 l_ctx = nfs_get_lock_context(ctx);
967 if (IS_ERR(l_ctx))
968 l_ctx = NULL;
969 else
970 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
971 }
972
973 status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
974
975 if (l_ctx)
976 nfs_put_lock_context(l_ctx);
977
978 return status;
979}
980
981static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
982{
983 return 0;
984}
985
986static const struct inode_operations nfs3_dir_inode_operations = {
987 .create = nfs_create,
988 .lookup = nfs_lookup,
989 .link = nfs_link,
990 .unlink = nfs_unlink,
991 .symlink = nfs_symlink,
992 .mkdir = nfs_mkdir,
993 .rmdir = nfs_rmdir,
994 .mknod = nfs_mknod,
995 .rename = nfs_rename,
996 .permission = nfs_permission,
997 .getattr = nfs_getattr,
998 .setattr = nfs_setattr,
999#ifdef CONFIG_NFS_V3_ACL
1000 .listxattr = nfs3_listxattr,
1001 .get_inode_acl = nfs3_get_acl,
1002 .set_acl = nfs3_set_acl,
1003#endif
1004};
1005
1006static const struct inode_operations nfs3_file_inode_operations = {
1007 .permission = nfs_permission,
1008 .getattr = nfs_getattr,
1009 .setattr = nfs_setattr,
1010#ifdef CONFIG_NFS_V3_ACL
1011 .listxattr = nfs3_listxattr,
1012 .get_inode_acl = nfs3_get_acl,
1013 .set_acl = nfs3_set_acl,
1014#endif
1015};
1016
1017const struct nfs_rpc_ops nfs_v3_clientops = {
1018 .version = 3, /* protocol version */
1019 .dentry_ops = &nfs_dentry_operations,
1020 .dir_inode_ops = &nfs3_dir_inode_operations,
1021 .file_inode_ops = &nfs3_file_inode_operations,
1022 .file_ops = &nfs_file_operations,
1023 .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
1024 .getroot = nfs3_proc_get_root,
1025 .submount = nfs_submount,
1026 .try_get_tree = nfs_try_get_tree,
1027 .getattr = nfs3_proc_getattr,
1028 .setattr = nfs3_proc_setattr,
1029 .lookup = nfs3_proc_lookup,
1030 .lookupp = nfs3_proc_lookupp,
1031 .access = nfs3_proc_access,
1032 .readlink = nfs3_proc_readlink,
1033 .create = nfs3_proc_create,
1034 .remove = nfs3_proc_remove,
1035 .unlink_setup = nfs3_proc_unlink_setup,
1036 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
1037 .unlink_done = nfs3_proc_unlink_done,
1038 .rename_setup = nfs3_proc_rename_setup,
1039 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
1040 .rename_done = nfs3_proc_rename_done,
1041 .link = nfs3_proc_link,
1042 .symlink = nfs3_proc_symlink,
1043 .mkdir = nfs3_proc_mkdir,
1044 .rmdir = nfs3_proc_rmdir,
1045 .readdir = nfs3_proc_readdir,
1046 .mknod = nfs3_proc_mknod,
1047 .statfs = nfs3_proc_statfs,
1048 .fsinfo = nfs3_proc_fsinfo,
1049 .pathconf = nfs3_proc_pathconf,
1050 .decode_dirent = nfs3_decode_dirent,
1051 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
1052 .read_setup = nfs3_proc_read_setup,
1053 .read_done = nfs3_read_done,
1054 .write_setup = nfs3_proc_write_setup,
1055 .write_done = nfs3_write_done,
1056 .commit_setup = nfs3_proc_commit_setup,
1057 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
1058 .commit_done = nfs3_commit_done,
1059 .lock = nfs3_proc_lock,
1060 .clear_acl_cache = forget_all_cached_acls,
1061 .close_context = nfs_close_context,
1062 .have_delegation = nfs3_have_delegation,
1063 .alloc_client = nfs_alloc_client,
1064 .init_client = nfs_init_client,
1065 .free_client = nfs_free_client,
1066 .create_server = nfs3_create_server,
1067 .clone_server = nfs3_clone_server,
1068};