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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, const 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, const 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, const 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, const 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 .get_acl = nfs3_get_acl,
903 .set_acl = nfs3_set_acl,
904#endif
905};
906
907static const struct inode_operations nfs3_file_inode_operations = {
908 .permission = nfs_permission,
909 .getattr = nfs_getattr,
910 .setattr = nfs_setattr,
911#ifdef CONFIG_NFS_V3_ACL
912 .listxattr = nfs3_listxattr,
913 .get_acl = nfs3_get_acl,
914 .set_acl = nfs3_set_acl,
915#endif
916};
917
918const struct nfs_rpc_ops nfs_v3_clientops = {
919 .version = 3, /* protocol version */
920 .dentry_ops = &nfs_dentry_operations,
921 .dir_inode_ops = &nfs3_dir_inode_operations,
922 .file_inode_ops = &nfs3_file_inode_operations,
923 .file_ops = &nfs_file_operations,
924 .getroot = nfs3_proc_get_root,
925 .submount = nfs_submount,
926 .try_mount = nfs_try_mount,
927 .getattr = nfs3_proc_getattr,
928 .setattr = nfs3_proc_setattr,
929 .lookup = nfs3_proc_lookup,
930 .access = nfs3_proc_access,
931 .readlink = nfs3_proc_readlink,
932 .create = nfs3_proc_create,
933 .remove = nfs3_proc_remove,
934 .unlink_setup = nfs3_proc_unlink_setup,
935 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
936 .unlink_done = nfs3_proc_unlink_done,
937 .rename_setup = nfs3_proc_rename_setup,
938 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
939 .rename_done = nfs3_proc_rename_done,
940 .link = nfs3_proc_link,
941 .symlink = nfs3_proc_symlink,
942 .mkdir = nfs3_proc_mkdir,
943 .rmdir = nfs3_proc_rmdir,
944 .readdir = nfs3_proc_readdir,
945 .mknod = nfs3_proc_mknod,
946 .statfs = nfs3_proc_statfs,
947 .fsinfo = nfs3_proc_fsinfo,
948 .pathconf = nfs3_proc_pathconf,
949 .decode_dirent = nfs3_decode_dirent,
950 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
951 .read_setup = nfs3_proc_read_setup,
952 .read_done = nfs3_read_done,
953 .write_setup = nfs3_proc_write_setup,
954 .write_done = nfs3_write_done,
955 .commit_setup = nfs3_proc_commit_setup,
956 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
957 .commit_done = nfs3_commit_done,
958 .lock = nfs3_proc_lock,
959 .clear_acl_cache = forget_all_cached_acls,
960 .close_context = nfs_close_context,
961 .have_delegation = nfs3_have_delegation,
962 .return_delegation = nfs3_return_delegation,
963 .alloc_client = nfs_alloc_client,
964 .init_client = nfs_init_client,
965 .free_client = nfs_free_client,
966 .create_server = nfs3_create_server,
967 .clone_server = nfs3_clone_server,
968};
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 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
47static int
48nfs3_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
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 nfs4_label *label)
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
113 dprintk("NFS call getattr\n");
114 nfs_fattr_init(fattr);
115 status = rpc_call_sync(server->client, &msg, 0);
116 dprintk("NFS reply getattr: %d\n", status);
117 return status;
118}
119
120static int
121nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
122 struct iattr *sattr)
123{
124 struct inode *inode = d_inode(dentry);
125 struct nfs3_sattrargs arg = {
126 .fh = NFS_FH(inode),
127 .sattr = sattr,
128 };
129 struct rpc_message msg = {
130 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
131 .rpc_argp = &arg,
132 .rpc_resp = fattr,
133 };
134 int status;
135
136 dprintk("NFS call setattr\n");
137 if (sattr->ia_valid & ATTR_FILE)
138 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
139 nfs_fattr_init(fattr);
140 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
141 if (status == 0) {
142 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
143 nfs_zap_acl_cache(inode);
144 nfs_setattr_update_inode(inode, sattr, fattr);
145 }
146 dprintk("NFS reply setattr: %d\n", status);
147 return status;
148}
149
150static int
151nfs3_proc_lookup(struct inode *dir, const struct qstr *name,
152 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
153 struct nfs4_label *label)
154{
155 struct nfs3_diropargs arg = {
156 .fh = NFS_FH(dir),
157 .name = name->name,
158 .len = name->len
159 };
160 struct nfs3_diropres res = {
161 .fh = fhandle,
162 .fattr = fattr
163 };
164 struct rpc_message msg = {
165 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
166 .rpc_argp = &arg,
167 .rpc_resp = &res,
168 };
169 int status;
170
171 dprintk("NFS call lookup %s\n", name->name);
172 res.dir_attr = nfs_alloc_fattr();
173 if (res.dir_attr == NULL)
174 return -ENOMEM;
175
176 nfs_fattr_init(fattr);
177 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
178 nfs_refresh_inode(dir, res.dir_attr);
179 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
180 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
181 msg.rpc_argp = fhandle;
182 msg.rpc_resp = fattr;
183 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
184 }
185 nfs_free_fattr(res.dir_attr);
186 dprintk("NFS reply lookup: %d\n", status);
187 return status;
188}
189
190static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
191{
192 struct nfs3_accessargs arg = {
193 .fh = NFS_FH(inode),
194 .access = entry->mask,
195 };
196 struct nfs3_accessres res;
197 struct rpc_message msg = {
198 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
199 .rpc_argp = &arg,
200 .rpc_resp = &res,
201 .rpc_cred = entry->cred,
202 };
203 int status = -ENOMEM;
204
205 dprintk("NFS call access\n");
206 res.fattr = nfs_alloc_fattr();
207 if (res.fattr == NULL)
208 goto out;
209
210 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
211 nfs_refresh_inode(inode, res.fattr);
212 if (status == 0)
213 nfs_access_set_mask(entry, res.access);
214 nfs_free_fattr(res.fattr);
215out:
216 dprintk("NFS reply access: %d\n", status);
217 return status;
218}
219
220static int nfs3_proc_readlink(struct inode *inode, struct page *page,
221 unsigned int pgbase, unsigned int pglen)
222{
223 struct nfs_fattr *fattr;
224 struct nfs3_readlinkargs args = {
225 .fh = NFS_FH(inode),
226 .pgbase = pgbase,
227 .pglen = pglen,
228 .pages = &page
229 };
230 struct rpc_message msg = {
231 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
232 .rpc_argp = &args,
233 };
234 int status = -ENOMEM;
235
236 dprintk("NFS call readlink\n");
237 fattr = nfs_alloc_fattr();
238 if (fattr == NULL)
239 goto out;
240 msg.rpc_resp = fattr;
241
242 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
243 nfs_refresh_inode(inode, fattr);
244 nfs_free_fattr(fattr);
245out:
246 dprintk("NFS reply readlink: %d\n", status);
247 return status;
248}
249
250struct nfs3_createdata {
251 struct rpc_message msg;
252 union {
253 struct nfs3_createargs create;
254 struct nfs3_mkdirargs mkdir;
255 struct nfs3_symlinkargs symlink;
256 struct nfs3_mknodargs mknod;
257 } arg;
258 struct nfs3_diropres res;
259 struct nfs_fh fh;
260 struct nfs_fattr fattr;
261 struct nfs_fattr dir_attr;
262};
263
264static struct nfs3_createdata *nfs3_alloc_createdata(void)
265{
266 struct nfs3_createdata *data;
267
268 data = kzalloc(sizeof(*data), GFP_KERNEL);
269 if (data != NULL) {
270 data->msg.rpc_argp = &data->arg;
271 data->msg.rpc_resp = &data->res;
272 data->res.fh = &data->fh;
273 data->res.fattr = &data->fattr;
274 data->res.dir_attr = &data->dir_attr;
275 nfs_fattr_init(data->res.fattr);
276 nfs_fattr_init(data->res.dir_attr);
277 }
278 return data;
279}
280
281static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
282{
283 int status;
284
285 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
286 nfs_post_op_update_inode(dir, data->res.dir_attr);
287 if (status == 0)
288 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
289 return status;
290}
291
292static void nfs3_free_createdata(struct nfs3_createdata *data)
293{
294 kfree(data);
295}
296
297/*
298 * Create a regular file.
299 */
300static int
301nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
302 int flags)
303{
304 struct posix_acl *default_acl, *acl;
305 struct nfs3_createdata *data;
306 int status = -ENOMEM;
307
308 dprintk("NFS call create %pd\n", dentry);
309
310 data = nfs3_alloc_createdata();
311 if (data == NULL)
312 goto out;
313
314 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
315 data->arg.create.fh = NFS_FH(dir);
316 data->arg.create.name = dentry->d_name.name;
317 data->arg.create.len = dentry->d_name.len;
318 data->arg.create.sattr = sattr;
319
320 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
321 if (flags & O_EXCL) {
322 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
323 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
324 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
325 }
326
327 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
328 if (status)
329 goto out;
330
331 for (;;) {
332 status = nfs3_do_create(dir, dentry, data);
333
334 if (status != -ENOTSUPP)
335 break;
336 /* If the server doesn't support the exclusive creation
337 * semantics, try again with simple 'guarded' mode. */
338 switch (data->arg.create.createmode) {
339 case NFS3_CREATE_EXCLUSIVE:
340 data->arg.create.createmode = NFS3_CREATE_GUARDED;
341 break;
342
343 case NFS3_CREATE_GUARDED:
344 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
345 break;
346
347 case NFS3_CREATE_UNCHECKED:
348 goto out;
349 }
350 nfs_fattr_init(data->res.dir_attr);
351 nfs_fattr_init(data->res.fattr);
352 }
353
354 if (status != 0)
355 goto out_release_acls;
356
357 /* When we created the file with exclusive semantics, make
358 * sure we set the attributes afterwards. */
359 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
360 dprintk("NFS call setattr (post-create)\n");
361
362 if (!(sattr->ia_valid & ATTR_ATIME_SET))
363 sattr->ia_valid |= ATTR_ATIME;
364 if (!(sattr->ia_valid & ATTR_MTIME_SET))
365 sattr->ia_valid |= ATTR_MTIME;
366
367 /* Note: we could use a guarded setattr here, but I'm
368 * not sure this buys us anything (and I'd have
369 * to revamp the NFSv3 XDR code) */
370 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
371 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
372 dprintk("NFS reply setattr (post-create): %d\n", status);
373 if (status != 0)
374 goto out_release_acls;
375 }
376
377 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
378
379out_release_acls:
380 posix_acl_release(acl);
381 posix_acl_release(default_acl);
382out:
383 nfs3_free_createdata(data);
384 dprintk("NFS reply create: %d\n", status);
385 return status;
386}
387
388static int
389nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
390{
391 struct nfs_removeargs arg = {
392 .fh = NFS_FH(dir),
393 .name = dentry->d_name,
394 };
395 struct nfs_removeres res;
396 struct rpc_message msg = {
397 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
398 .rpc_argp = &arg,
399 .rpc_resp = &res,
400 };
401 int status = -ENOMEM;
402
403 dprintk("NFS call remove %pd2\n", dentry);
404 res.dir_attr = nfs_alloc_fattr();
405 if (res.dir_attr == NULL)
406 goto out;
407
408 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
409 nfs_post_op_update_inode(dir, res.dir_attr);
410 nfs_free_fattr(res.dir_attr);
411out:
412 dprintk("NFS reply remove: %d\n", status);
413 return status;
414}
415
416static void
417nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
418{
419 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
420}
421
422static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
423{
424 rpc_call_start(task);
425}
426
427static int
428nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
429{
430 struct nfs_removeres *res;
431 if (nfs3_async_handle_jukebox(task, dir))
432 return 0;
433 res = task->tk_msg.rpc_resp;
434 nfs_post_op_update_inode(dir, res->dir_attr);
435 return 1;
436}
437
438static void
439nfs3_proc_rename_setup(struct rpc_message *msg,
440 struct dentry *old_dentry,
441 struct dentry *new_dentry)
442{
443 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
444}
445
446static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
447{
448 rpc_call_start(task);
449}
450
451static int
452nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
453 struct inode *new_dir)
454{
455 struct nfs_renameres *res;
456
457 if (nfs3_async_handle_jukebox(task, old_dir))
458 return 0;
459 res = task->tk_msg.rpc_resp;
460
461 nfs_post_op_update_inode(old_dir, res->old_fattr);
462 nfs_post_op_update_inode(new_dir, res->new_fattr);
463 return 1;
464}
465
466static int
467nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
468{
469 struct nfs3_linkargs arg = {
470 .fromfh = NFS_FH(inode),
471 .tofh = NFS_FH(dir),
472 .toname = name->name,
473 .tolen = name->len
474 };
475 struct nfs3_linkres res;
476 struct rpc_message msg = {
477 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
478 .rpc_argp = &arg,
479 .rpc_resp = &res,
480 };
481 int status = -ENOMEM;
482
483 dprintk("NFS call link %s\n", name->name);
484 res.fattr = nfs_alloc_fattr();
485 res.dir_attr = nfs_alloc_fattr();
486 if (res.fattr == NULL || res.dir_attr == NULL)
487 goto out;
488
489 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
490 nfs_post_op_update_inode(dir, res.dir_attr);
491 nfs_post_op_update_inode(inode, res.fattr);
492out:
493 nfs_free_fattr(res.dir_attr);
494 nfs_free_fattr(res.fattr);
495 dprintk("NFS reply link: %d\n", status);
496 return status;
497}
498
499static int
500nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
501 unsigned int len, struct iattr *sattr)
502{
503 struct nfs3_createdata *data;
504 int status = -ENOMEM;
505
506 if (len > NFS3_MAXPATHLEN)
507 return -ENAMETOOLONG;
508
509 dprintk("NFS call symlink %pd\n", dentry);
510
511 data = nfs3_alloc_createdata();
512 if (data == NULL)
513 goto out;
514 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
515 data->arg.symlink.fromfh = NFS_FH(dir);
516 data->arg.symlink.fromname = dentry->d_name.name;
517 data->arg.symlink.fromlen = dentry->d_name.len;
518 data->arg.symlink.pages = &page;
519 data->arg.symlink.pathlen = len;
520 data->arg.symlink.sattr = sattr;
521
522 status = nfs3_do_create(dir, dentry, data);
523
524 nfs3_free_createdata(data);
525out:
526 dprintk("NFS reply symlink: %d\n", status);
527 return status;
528}
529
530static int
531nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
532{
533 struct posix_acl *default_acl, *acl;
534 struct nfs3_createdata *data;
535 int status = -ENOMEM;
536
537 dprintk("NFS call mkdir %pd\n", dentry);
538
539 data = nfs3_alloc_createdata();
540 if (data == NULL)
541 goto out;
542
543 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
544 if (status)
545 goto out;
546
547 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
548 data->arg.mkdir.fh = NFS_FH(dir);
549 data->arg.mkdir.name = dentry->d_name.name;
550 data->arg.mkdir.len = dentry->d_name.len;
551 data->arg.mkdir.sattr = sattr;
552
553 status = nfs3_do_create(dir, dentry, data);
554 if (status != 0)
555 goto out_release_acls;
556
557 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
558
559out_release_acls:
560 posix_acl_release(acl);
561 posix_acl_release(default_acl);
562out:
563 nfs3_free_createdata(data);
564 dprintk("NFS reply mkdir: %d\n", status);
565 return status;
566}
567
568static int
569nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
570{
571 struct nfs_fattr *dir_attr;
572 struct nfs3_diropargs arg = {
573 .fh = NFS_FH(dir),
574 .name = name->name,
575 .len = name->len
576 };
577 struct rpc_message msg = {
578 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
579 .rpc_argp = &arg,
580 };
581 int status = -ENOMEM;
582
583 dprintk("NFS call rmdir %s\n", name->name);
584 dir_attr = nfs_alloc_fattr();
585 if (dir_attr == NULL)
586 goto out;
587
588 msg.rpc_resp = dir_attr;
589 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
590 nfs_post_op_update_inode(dir, dir_attr);
591 nfs_free_fattr(dir_attr);
592out:
593 dprintk("NFS reply rmdir: %d\n", status);
594 return status;
595}
596
597/*
598 * The READDIR implementation is somewhat hackish - we pass the user buffer
599 * to the encode function, which installs it in the receive iovec.
600 * The decode function itself doesn't perform any decoding, it just makes
601 * sure the reply is syntactically correct.
602 *
603 * Also note that this implementation handles both plain readdir and
604 * readdirplus.
605 */
606static int
607nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
608 u64 cookie, struct page **pages, unsigned int count, bool plus)
609{
610 struct inode *dir = d_inode(dentry);
611 __be32 *verf = NFS_I(dir)->cookieverf;
612 struct nfs3_readdirargs arg = {
613 .fh = NFS_FH(dir),
614 .cookie = cookie,
615 .verf = {verf[0], verf[1]},
616 .plus = plus,
617 .count = count,
618 .pages = pages
619 };
620 struct nfs3_readdirres res = {
621 .verf = verf,
622 .plus = plus
623 };
624 struct rpc_message msg = {
625 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
626 .rpc_argp = &arg,
627 .rpc_resp = &res,
628 .rpc_cred = cred
629 };
630 int status = -ENOMEM;
631
632 if (plus)
633 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
634
635 dprintk("NFS call readdir%s %d\n",
636 plus? "plus" : "", (unsigned int) cookie);
637
638 res.dir_attr = nfs_alloc_fattr();
639 if (res.dir_attr == NULL)
640 goto out;
641
642 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
643
644 nfs_invalidate_atime(dir);
645 nfs_refresh_inode(dir, res.dir_attr);
646
647 nfs_free_fattr(res.dir_attr);
648out:
649 dprintk("NFS reply readdir%s: %d\n",
650 plus? "plus" : "", status);
651 return status;
652}
653
654static int
655nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
656 dev_t rdev)
657{
658 struct posix_acl *default_acl, *acl;
659 struct nfs3_createdata *data;
660 int status = -ENOMEM;
661
662 dprintk("NFS call mknod %pd %u:%u\n", dentry,
663 MAJOR(rdev), MINOR(rdev));
664
665 data = nfs3_alloc_createdata();
666 if (data == NULL)
667 goto out;
668
669 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
670 if (status)
671 goto out;
672
673 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
674 data->arg.mknod.fh = NFS_FH(dir);
675 data->arg.mknod.name = dentry->d_name.name;
676 data->arg.mknod.len = dentry->d_name.len;
677 data->arg.mknod.sattr = sattr;
678 data->arg.mknod.rdev = rdev;
679
680 switch (sattr->ia_mode & S_IFMT) {
681 case S_IFBLK:
682 data->arg.mknod.type = NF3BLK;
683 break;
684 case S_IFCHR:
685 data->arg.mknod.type = NF3CHR;
686 break;
687 case S_IFIFO:
688 data->arg.mknod.type = NF3FIFO;
689 break;
690 case S_IFSOCK:
691 data->arg.mknod.type = NF3SOCK;
692 break;
693 default:
694 status = -EINVAL;
695 goto out;
696 }
697
698 status = nfs3_do_create(dir, dentry, data);
699 if (status != 0)
700 goto out_release_acls;
701
702 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
703
704out_release_acls:
705 posix_acl_release(acl);
706 posix_acl_release(default_acl);
707out:
708 nfs3_free_createdata(data);
709 dprintk("NFS reply mknod: %d\n", status);
710 return status;
711}
712
713static int
714nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
715 struct nfs_fsstat *stat)
716{
717 struct rpc_message msg = {
718 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
719 .rpc_argp = fhandle,
720 .rpc_resp = stat,
721 };
722 int status;
723
724 dprintk("NFS call fsstat\n");
725 nfs_fattr_init(stat->fattr);
726 status = rpc_call_sync(server->client, &msg, 0);
727 dprintk("NFS reply fsstat: %d\n", status);
728 return status;
729}
730
731static int
732do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
733 struct nfs_fsinfo *info)
734{
735 struct rpc_message msg = {
736 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
737 .rpc_argp = fhandle,
738 .rpc_resp = info,
739 };
740 int status;
741
742 dprintk("NFS call fsinfo\n");
743 nfs_fattr_init(info->fattr);
744 status = rpc_call_sync(client, &msg, 0);
745 dprintk("NFS reply fsinfo: %d\n", status);
746 return status;
747}
748
749/*
750 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
751 * nfs_create_server
752 */
753static int
754nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
755 struct nfs_fsinfo *info)
756{
757 int status;
758
759 status = do_proc_fsinfo(server->client, fhandle, info);
760 if (status && server->nfs_client->cl_rpcclient != server->client)
761 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
762 return status;
763}
764
765static int
766nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
767 struct nfs_pathconf *info)
768{
769 struct rpc_message msg = {
770 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
771 .rpc_argp = fhandle,
772 .rpc_resp = info,
773 };
774 int status;
775
776 dprintk("NFS call pathconf\n");
777 nfs_fattr_init(info->fattr);
778 status = rpc_call_sync(server->client, &msg, 0);
779 dprintk("NFS reply pathconf: %d\n", status);
780 return status;
781}
782
783static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
784{
785 struct inode *inode = hdr->inode;
786
787 if (hdr->pgio_done_cb != NULL)
788 return hdr->pgio_done_cb(task, hdr);
789
790 if (nfs3_async_handle_jukebox(task, inode))
791 return -EAGAIN;
792
793 nfs_invalidate_atime(inode);
794 nfs_refresh_inode(inode, &hdr->fattr);
795 return 0;
796}
797
798static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
799 struct rpc_message *msg)
800{
801 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
802}
803
804static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
805 struct nfs_pgio_header *hdr)
806{
807 rpc_call_start(task);
808 return 0;
809}
810
811static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
812{
813 struct inode *inode = hdr->inode;
814
815 if (hdr->pgio_done_cb != NULL)
816 return hdr->pgio_done_cb(task, hdr);
817
818 if (nfs3_async_handle_jukebox(task, inode))
819 return -EAGAIN;
820 if (task->tk_status >= 0)
821 nfs_writeback_update_inode(hdr);
822 return 0;
823}
824
825static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
826 struct rpc_message *msg)
827{
828 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
829}
830
831static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
832{
833 rpc_call_start(task);
834}
835
836static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
837{
838 if (data->commit_done_cb != NULL)
839 return data->commit_done_cb(task, data);
840
841 if (nfs3_async_handle_jukebox(task, data->inode))
842 return -EAGAIN;
843 nfs_refresh_inode(data->inode, data->res.fattr);
844 return 0;
845}
846
847static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
848{
849 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
850}
851
852static void nfs3_nlm_alloc_call(void *data)
853{
854 struct nfs_lock_context *l_ctx = data;
855 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
856 get_nfs_open_context(l_ctx->open_context);
857 nfs_get_lock_context(l_ctx->open_context);
858 }
859}
860
861static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
862{
863 struct nfs_lock_context *l_ctx = data;
864 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
865 return nfs_async_iocounter_wait(task, l_ctx);
866 return false;
867
868}
869
870static void nfs3_nlm_release_call(void *data)
871{
872 struct nfs_lock_context *l_ctx = data;
873 struct nfs_open_context *ctx;
874 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
875 ctx = l_ctx->open_context;
876 nfs_put_lock_context(l_ctx);
877 put_nfs_open_context(ctx);
878 }
879}
880
881static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
882 .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
883 .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
884 .nlmclnt_release_call = nfs3_nlm_release_call,
885};
886
887static int
888nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
889{
890 struct inode *inode = file_inode(filp);
891 struct nfs_lock_context *l_ctx = NULL;
892 struct nfs_open_context *ctx = nfs_file_open_context(filp);
893 int status;
894
895 if (fl->fl_flags & FL_CLOSE) {
896 l_ctx = nfs_get_lock_context(ctx);
897 if (IS_ERR(l_ctx))
898 l_ctx = NULL;
899 else
900 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
901 }
902
903 status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
904
905 if (l_ctx)
906 nfs_put_lock_context(l_ctx);
907
908 return status;
909}
910
911static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
912{
913 return 0;
914}
915
916static const struct inode_operations nfs3_dir_inode_operations = {
917 .create = nfs_create,
918 .lookup = nfs_lookup,
919 .link = nfs_link,
920 .unlink = nfs_unlink,
921 .symlink = nfs_symlink,
922 .mkdir = nfs_mkdir,
923 .rmdir = nfs_rmdir,
924 .mknod = nfs_mknod,
925 .rename = nfs_rename,
926 .permission = nfs_permission,
927 .getattr = nfs_getattr,
928 .setattr = nfs_setattr,
929#ifdef CONFIG_NFS_V3_ACL
930 .listxattr = nfs3_listxattr,
931 .get_acl = nfs3_get_acl,
932 .set_acl = nfs3_set_acl,
933#endif
934};
935
936static const struct inode_operations nfs3_file_inode_operations = {
937 .permission = nfs_permission,
938 .getattr = nfs_getattr,
939 .setattr = nfs_setattr,
940#ifdef CONFIG_NFS_V3_ACL
941 .listxattr = nfs3_listxattr,
942 .get_acl = nfs3_get_acl,
943 .set_acl = nfs3_set_acl,
944#endif
945};
946
947const struct nfs_rpc_ops nfs_v3_clientops = {
948 .version = 3, /* protocol version */
949 .dentry_ops = &nfs_dentry_operations,
950 .dir_inode_ops = &nfs3_dir_inode_operations,
951 .file_inode_ops = &nfs3_file_inode_operations,
952 .file_ops = &nfs_file_operations,
953 .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
954 .getroot = nfs3_proc_get_root,
955 .submount = nfs_submount,
956 .try_mount = nfs_try_mount,
957 .getattr = nfs3_proc_getattr,
958 .setattr = nfs3_proc_setattr,
959 .lookup = nfs3_proc_lookup,
960 .access = nfs3_proc_access,
961 .readlink = nfs3_proc_readlink,
962 .create = nfs3_proc_create,
963 .remove = nfs3_proc_remove,
964 .unlink_setup = nfs3_proc_unlink_setup,
965 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
966 .unlink_done = nfs3_proc_unlink_done,
967 .rename_setup = nfs3_proc_rename_setup,
968 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
969 .rename_done = nfs3_proc_rename_done,
970 .link = nfs3_proc_link,
971 .symlink = nfs3_proc_symlink,
972 .mkdir = nfs3_proc_mkdir,
973 .rmdir = nfs3_proc_rmdir,
974 .readdir = nfs3_proc_readdir,
975 .mknod = nfs3_proc_mknod,
976 .statfs = nfs3_proc_statfs,
977 .fsinfo = nfs3_proc_fsinfo,
978 .pathconf = nfs3_proc_pathconf,
979 .decode_dirent = nfs3_decode_dirent,
980 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
981 .read_setup = nfs3_proc_read_setup,
982 .read_done = nfs3_read_done,
983 .write_setup = nfs3_proc_write_setup,
984 .write_done = nfs3_write_done,
985 .commit_setup = nfs3_proc_commit_setup,
986 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
987 .commit_done = nfs3_commit_done,
988 .lock = nfs3_proc_lock,
989 .clear_acl_cache = forget_all_cached_acls,
990 .close_context = nfs_close_context,
991 .have_delegation = nfs3_have_delegation,
992 .alloc_client = nfs_alloc_client,
993 .init_client = nfs_init_client,
994 .free_client = nfs_free_client,
995 .create_server = nfs3_create_server,
996 .clone_server = nfs3_clone_server,
997};