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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, 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/*
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
26#define NFSDBG_FACILITY NFSDBG_PROC
27
28/* A wrapper to handle the EJUKEBOX error messages */
29static int
30nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
31{
32 int res;
33 do {
34 res = rpc_call_sync(clnt, msg, flags);
35 if (res != -EJUKEBOX)
36 break;
37 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
38 res = -ERESTARTSYS;
39 } while (!fatal_signal_pending(current));
40 return res;
41}
42
43#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
44
45static int
46nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
47{
48 if (task->tk_status != -EJUKEBOX)
49 return 0;
50 if (task->tk_status == -EJUKEBOX)
51 nfs_inc_stats(inode, NFSIOS_DELAY);
52 task->tk_status = 0;
53 rpc_restart_call(task);
54 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
55 return 1;
56}
57
58static int
59do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
60 struct nfs_fsinfo *info)
61{
62 struct rpc_message msg = {
63 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
64 .rpc_argp = fhandle,
65 .rpc_resp = info,
66 };
67 int status;
68
69 dprintk("%s: call fsinfo\n", __func__);
70 nfs_fattr_init(info->fattr);
71 status = rpc_call_sync(client, &msg, 0);
72 dprintk("%s: reply fsinfo: %d\n", __func__, status);
73 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
74 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
75 msg.rpc_resp = info->fattr;
76 status = rpc_call_sync(client, &msg, 0);
77 dprintk("%s: reply getattr: %d\n", __func__, status);
78 }
79 return status;
80}
81
82/*
83 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
84 */
85static int
86nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
87 struct nfs_fsinfo *info)
88{
89 int status;
90
91 status = do_proc_get_root(server->client, fhandle, info);
92 if (status && server->nfs_client->cl_rpcclient != server->client)
93 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
94 return status;
95}
96
97/*
98 * One function for each procedure in the NFS protocol.
99 */
100static int
101nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
102 struct nfs_fattr *fattr, struct nfs4_label *label)
103{
104 struct rpc_message msg = {
105 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
106 .rpc_argp = fhandle,
107 .rpc_resp = fattr,
108 };
109 int status;
110
111 dprintk("NFS call getattr\n");
112 nfs_fattr_init(fattr);
113 status = rpc_call_sync(server->client, &msg, 0);
114 dprintk("NFS reply getattr: %d\n", status);
115 return status;
116}
117
118static int
119nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
120 struct iattr *sattr)
121{
122 struct inode *inode = dentry->d_inode;
123 struct nfs3_sattrargs arg = {
124 .fh = NFS_FH(inode),
125 .sattr = sattr,
126 };
127 struct rpc_message msg = {
128 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
129 .rpc_argp = &arg,
130 .rpc_resp = fattr,
131 };
132 int status;
133
134 dprintk("NFS call setattr\n");
135 if (sattr->ia_valid & ATTR_FILE)
136 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
137 nfs_fattr_init(fattr);
138 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
139 if (status == 0)
140 nfs_setattr_update_inode(inode, sattr);
141 dprintk("NFS reply setattr: %d\n", status);
142 return status;
143}
144
145static int
146nfs3_proc_lookup(struct inode *dir, struct qstr *name,
147 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
148 struct nfs4_label *label)
149{
150 struct nfs3_diropargs arg = {
151 .fh = NFS_FH(dir),
152 .name = name->name,
153 .len = name->len
154 };
155 struct nfs3_diropres res = {
156 .fh = fhandle,
157 .fattr = fattr
158 };
159 struct rpc_message msg = {
160 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
161 .rpc_argp = &arg,
162 .rpc_resp = &res,
163 };
164 int status;
165
166 dprintk("NFS call lookup %s\n", name->name);
167 res.dir_attr = nfs_alloc_fattr();
168 if (res.dir_attr == NULL)
169 return -ENOMEM;
170
171 nfs_fattr_init(fattr);
172 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
173 nfs_refresh_inode(dir, res.dir_attr);
174 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
175 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
176 msg.rpc_argp = fhandle;
177 msg.rpc_resp = fattr;
178 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
179 }
180 nfs_free_fattr(res.dir_attr);
181 dprintk("NFS reply lookup: %d\n", status);
182 return status;
183}
184
185static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
186{
187 struct nfs3_accessargs arg = {
188 .fh = NFS_FH(inode),
189 };
190 struct nfs3_accessres res;
191 struct rpc_message msg = {
192 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
193 .rpc_argp = &arg,
194 .rpc_resp = &res,
195 .rpc_cred = entry->cred,
196 };
197 int mode = entry->mask;
198 int status = -ENOMEM;
199
200 dprintk("NFS call access\n");
201
202 if (mode & MAY_READ)
203 arg.access |= NFS3_ACCESS_READ;
204 if (S_ISDIR(inode->i_mode)) {
205 if (mode & MAY_WRITE)
206 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
207 if (mode & MAY_EXEC)
208 arg.access |= NFS3_ACCESS_LOOKUP;
209 } else {
210 if (mode & MAY_WRITE)
211 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
212 if (mode & MAY_EXEC)
213 arg.access |= NFS3_ACCESS_EXECUTE;
214 }
215
216 res.fattr = nfs_alloc_fattr();
217 if (res.fattr == NULL)
218 goto out;
219
220 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
221 nfs_refresh_inode(inode, res.fattr);
222 if (status == 0) {
223 entry->mask = 0;
224 if (res.access & NFS3_ACCESS_READ)
225 entry->mask |= MAY_READ;
226 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
227 entry->mask |= MAY_WRITE;
228 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
229 entry->mask |= MAY_EXEC;
230 }
231 nfs_free_fattr(res.fattr);
232out:
233 dprintk("NFS reply access: %d\n", status);
234 return status;
235}
236
237static int nfs3_proc_readlink(struct inode *inode, struct page *page,
238 unsigned int pgbase, unsigned int pglen)
239{
240 struct nfs_fattr *fattr;
241 struct nfs3_readlinkargs args = {
242 .fh = NFS_FH(inode),
243 .pgbase = pgbase,
244 .pglen = pglen,
245 .pages = &page
246 };
247 struct rpc_message msg = {
248 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
249 .rpc_argp = &args,
250 };
251 int status = -ENOMEM;
252
253 dprintk("NFS call readlink\n");
254 fattr = nfs_alloc_fattr();
255 if (fattr == NULL)
256 goto out;
257 msg.rpc_resp = fattr;
258
259 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
260 nfs_refresh_inode(inode, fattr);
261 nfs_free_fattr(fattr);
262out:
263 dprintk("NFS reply readlink: %d\n", status);
264 return status;
265}
266
267struct nfs3_createdata {
268 struct rpc_message msg;
269 union {
270 struct nfs3_createargs create;
271 struct nfs3_mkdirargs mkdir;
272 struct nfs3_symlinkargs symlink;
273 struct nfs3_mknodargs mknod;
274 } arg;
275 struct nfs3_diropres res;
276 struct nfs_fh fh;
277 struct nfs_fattr fattr;
278 struct nfs_fattr dir_attr;
279};
280
281static struct nfs3_createdata *nfs3_alloc_createdata(void)
282{
283 struct nfs3_createdata *data;
284
285 data = kzalloc(sizeof(*data), GFP_KERNEL);
286 if (data != NULL) {
287 data->msg.rpc_argp = &data->arg;
288 data->msg.rpc_resp = &data->res;
289 data->res.fh = &data->fh;
290 data->res.fattr = &data->fattr;
291 data->res.dir_attr = &data->dir_attr;
292 nfs_fattr_init(data->res.fattr);
293 nfs_fattr_init(data->res.dir_attr);
294 }
295 return data;
296}
297
298static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
299{
300 int status;
301
302 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
303 nfs_post_op_update_inode(dir, data->res.dir_attr);
304 if (status == 0)
305 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
306 return status;
307}
308
309static void nfs3_free_createdata(struct nfs3_createdata *data)
310{
311 kfree(data);
312}
313
314/*
315 * Create a regular file.
316 */
317static int
318nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
319 int flags)
320{
321 struct posix_acl *default_acl, *acl;
322 struct nfs3_createdata *data;
323 int status = -ENOMEM;
324
325 dprintk("NFS call create %pd\n", dentry);
326
327 data = nfs3_alloc_createdata();
328 if (data == NULL)
329 goto out;
330
331 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
332 data->arg.create.fh = NFS_FH(dir);
333 data->arg.create.name = dentry->d_name.name;
334 data->arg.create.len = dentry->d_name.len;
335 data->arg.create.sattr = sattr;
336
337 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
338 if (flags & O_EXCL) {
339 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
340 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
341 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
342 }
343
344 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
345 if (status)
346 goto out;
347
348 for (;;) {
349 status = nfs3_do_create(dir, dentry, data);
350
351 if (status != -ENOTSUPP)
352 break;
353 /* If the server doesn't support the exclusive creation
354 * semantics, try again with simple 'guarded' mode. */
355 switch (data->arg.create.createmode) {
356 case NFS3_CREATE_EXCLUSIVE:
357 data->arg.create.createmode = NFS3_CREATE_GUARDED;
358 break;
359
360 case NFS3_CREATE_GUARDED:
361 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
362 break;
363
364 case NFS3_CREATE_UNCHECKED:
365 goto out;
366 }
367 nfs_fattr_init(data->res.dir_attr);
368 nfs_fattr_init(data->res.fattr);
369 }
370
371 if (status != 0)
372 goto out_release_acls;
373
374 /* When we created the file with exclusive semantics, make
375 * sure we set the attributes afterwards. */
376 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
377 dprintk("NFS call setattr (post-create)\n");
378
379 if (!(sattr->ia_valid & ATTR_ATIME_SET))
380 sattr->ia_valid |= ATTR_ATIME;
381 if (!(sattr->ia_valid & ATTR_MTIME_SET))
382 sattr->ia_valid |= ATTR_MTIME;
383
384 /* Note: we could use a guarded setattr here, but I'm
385 * not sure this buys us anything (and I'd have
386 * to revamp the NFSv3 XDR code) */
387 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
388 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
389 dprintk("NFS reply setattr (post-create): %d\n", status);
390 if (status != 0)
391 goto out_release_acls;
392 }
393
394 status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
395
396out_release_acls:
397 posix_acl_release(acl);
398 posix_acl_release(default_acl);
399out:
400 nfs3_free_createdata(data);
401 dprintk("NFS reply create: %d\n", status);
402 return status;
403}
404
405static int
406nfs3_proc_remove(struct inode *dir, struct qstr *name)
407{
408 struct nfs_removeargs arg = {
409 .fh = NFS_FH(dir),
410 .name = *name,
411 };
412 struct nfs_removeres res;
413 struct rpc_message msg = {
414 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
415 .rpc_argp = &arg,
416 .rpc_resp = &res,
417 };
418 int status = -ENOMEM;
419
420 dprintk("NFS call remove %s\n", name->name);
421 res.dir_attr = nfs_alloc_fattr();
422 if (res.dir_attr == NULL)
423 goto out;
424
425 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
426 nfs_post_op_update_inode(dir, res.dir_attr);
427 nfs_free_fattr(res.dir_attr);
428out:
429 dprintk("NFS reply remove: %d\n", status);
430 return status;
431}
432
433static void
434nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
435{
436 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
437}
438
439static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
440{
441 rpc_call_start(task);
442}
443
444static int
445nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
446{
447 struct nfs_removeres *res;
448 if (nfs3_async_handle_jukebox(task, dir))
449 return 0;
450 res = task->tk_msg.rpc_resp;
451 nfs_post_op_update_inode(dir, res->dir_attr);
452 return 1;
453}
454
455static void
456nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
457{
458 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
459}
460
461static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
462{
463 rpc_call_start(task);
464}
465
466static int
467nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
468 struct inode *new_dir)
469{
470 struct nfs_renameres *res;
471
472 if (nfs3_async_handle_jukebox(task, old_dir))
473 return 0;
474 res = task->tk_msg.rpc_resp;
475
476 nfs_post_op_update_inode(old_dir, res->old_fattr);
477 nfs_post_op_update_inode(new_dir, res->new_fattr);
478 return 1;
479}
480
481static int
482nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
483{
484 struct nfs3_linkargs arg = {
485 .fromfh = NFS_FH(inode),
486 .tofh = NFS_FH(dir),
487 .toname = name->name,
488 .tolen = name->len
489 };
490 struct nfs3_linkres res;
491 struct rpc_message msg = {
492 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
493 .rpc_argp = &arg,
494 .rpc_resp = &res,
495 };
496 int status = -ENOMEM;
497
498 dprintk("NFS call link %s\n", name->name);
499 res.fattr = nfs_alloc_fattr();
500 res.dir_attr = nfs_alloc_fattr();
501 if (res.fattr == NULL || res.dir_attr == NULL)
502 goto out;
503
504 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
505 nfs_post_op_update_inode(dir, res.dir_attr);
506 nfs_post_op_update_inode(inode, res.fattr);
507out:
508 nfs_free_fattr(res.dir_attr);
509 nfs_free_fattr(res.fattr);
510 dprintk("NFS reply link: %d\n", status);
511 return status;
512}
513
514static int
515nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
516 unsigned int len, struct iattr *sattr)
517{
518 struct nfs3_createdata *data;
519 int status = -ENOMEM;
520
521 if (len > NFS3_MAXPATHLEN)
522 return -ENAMETOOLONG;
523
524 dprintk("NFS call symlink %pd\n", dentry);
525
526 data = nfs3_alloc_createdata();
527 if (data == NULL)
528 goto out;
529 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
530 data->arg.symlink.fromfh = NFS_FH(dir);
531 data->arg.symlink.fromname = dentry->d_name.name;
532 data->arg.symlink.fromlen = dentry->d_name.len;
533 data->arg.symlink.pages = &page;
534 data->arg.symlink.pathlen = len;
535 data->arg.symlink.sattr = sattr;
536
537 status = nfs3_do_create(dir, dentry, data);
538
539 nfs3_free_createdata(data);
540out:
541 dprintk("NFS reply symlink: %d\n", status);
542 return status;
543}
544
545static int
546nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
547{
548 struct posix_acl *default_acl, *acl;
549 struct nfs3_createdata *data;
550 int status = -ENOMEM;
551
552 dprintk("NFS call mkdir %pd\n", dentry);
553
554 data = nfs3_alloc_createdata();
555 if (data == NULL)
556 goto out;
557
558 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
559 if (status)
560 goto out;
561
562 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
563 data->arg.mkdir.fh = NFS_FH(dir);
564 data->arg.mkdir.name = dentry->d_name.name;
565 data->arg.mkdir.len = dentry->d_name.len;
566 data->arg.mkdir.sattr = sattr;
567
568 status = nfs3_do_create(dir, dentry, data);
569 if (status != 0)
570 goto out_release_acls;
571
572 status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
573
574out_release_acls:
575 posix_acl_release(acl);
576 posix_acl_release(default_acl);
577out:
578 nfs3_free_createdata(data);
579 dprintk("NFS reply mkdir: %d\n", status);
580 return status;
581}
582
583static int
584nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
585{
586 struct nfs_fattr *dir_attr;
587 struct nfs3_diropargs arg = {
588 .fh = NFS_FH(dir),
589 .name = name->name,
590 .len = name->len
591 };
592 struct rpc_message msg = {
593 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
594 .rpc_argp = &arg,
595 };
596 int status = -ENOMEM;
597
598 dprintk("NFS call rmdir %s\n", name->name);
599 dir_attr = nfs_alloc_fattr();
600 if (dir_attr == NULL)
601 goto out;
602
603 msg.rpc_resp = dir_attr;
604 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
605 nfs_post_op_update_inode(dir, dir_attr);
606 nfs_free_fattr(dir_attr);
607out:
608 dprintk("NFS reply rmdir: %d\n", status);
609 return status;
610}
611
612/*
613 * The READDIR implementation is somewhat hackish - we pass the user buffer
614 * to the encode function, which installs it in the receive iovec.
615 * The decode function itself doesn't perform any decoding, it just makes
616 * sure the reply is syntactically correct.
617 *
618 * Also note that this implementation handles both plain readdir and
619 * readdirplus.
620 */
621static int
622nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
623 u64 cookie, struct page **pages, unsigned int count, int plus)
624{
625 struct inode *dir = dentry->d_inode;
626 __be32 *verf = NFS_I(dir)->cookieverf;
627 struct nfs3_readdirargs arg = {
628 .fh = NFS_FH(dir),
629 .cookie = cookie,
630 .verf = {verf[0], verf[1]},
631 .plus = plus,
632 .count = count,
633 .pages = pages
634 };
635 struct nfs3_readdirres res = {
636 .verf = verf,
637 .plus = plus
638 };
639 struct rpc_message msg = {
640 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
641 .rpc_argp = &arg,
642 .rpc_resp = &res,
643 .rpc_cred = cred
644 };
645 int status = -ENOMEM;
646
647 if (plus)
648 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
649
650 dprintk("NFS call readdir%s %d\n",
651 plus? "plus" : "", (unsigned int) cookie);
652
653 res.dir_attr = nfs_alloc_fattr();
654 if (res.dir_attr == NULL)
655 goto out;
656
657 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
658
659 nfs_invalidate_atime(dir);
660 nfs_refresh_inode(dir, res.dir_attr);
661
662 nfs_free_fattr(res.dir_attr);
663out:
664 dprintk("NFS reply readdir%s: %d\n",
665 plus? "plus" : "", status);
666 return status;
667}
668
669static int
670nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
671 dev_t rdev)
672{
673 struct posix_acl *default_acl, *acl;
674 struct nfs3_createdata *data;
675 int status = -ENOMEM;
676
677 dprintk("NFS call mknod %pd %u:%u\n", dentry,
678 MAJOR(rdev), MINOR(rdev));
679
680 data = nfs3_alloc_createdata();
681 if (data == NULL)
682 goto out;
683
684 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
685 if (status)
686 goto out;
687
688 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
689 data->arg.mknod.fh = NFS_FH(dir);
690 data->arg.mknod.name = dentry->d_name.name;
691 data->arg.mknod.len = dentry->d_name.len;
692 data->arg.mknod.sattr = sattr;
693 data->arg.mknod.rdev = rdev;
694
695 switch (sattr->ia_mode & S_IFMT) {
696 case S_IFBLK:
697 data->arg.mknod.type = NF3BLK;
698 break;
699 case S_IFCHR:
700 data->arg.mknod.type = NF3CHR;
701 break;
702 case S_IFIFO:
703 data->arg.mknod.type = NF3FIFO;
704 break;
705 case S_IFSOCK:
706 data->arg.mknod.type = NF3SOCK;
707 break;
708 default:
709 status = -EINVAL;
710 goto out;
711 }
712
713 status = nfs3_do_create(dir, dentry, data);
714 if (status != 0)
715 goto out_release_acls;
716
717 status = nfs3_proc_setacls(dentry->d_inode, acl, default_acl);
718
719out_release_acls:
720 posix_acl_release(acl);
721 posix_acl_release(default_acl);
722out:
723 nfs3_free_createdata(data);
724 dprintk("NFS reply mknod: %d\n", status);
725 return status;
726}
727
728static int
729nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
730 struct nfs_fsstat *stat)
731{
732 struct rpc_message msg = {
733 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
734 .rpc_argp = fhandle,
735 .rpc_resp = stat,
736 };
737 int status;
738
739 dprintk("NFS call fsstat\n");
740 nfs_fattr_init(stat->fattr);
741 status = rpc_call_sync(server->client, &msg, 0);
742 dprintk("NFS reply fsstat: %d\n", status);
743 return status;
744}
745
746static int
747do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
748 struct nfs_fsinfo *info)
749{
750 struct rpc_message msg = {
751 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
752 .rpc_argp = fhandle,
753 .rpc_resp = info,
754 };
755 int status;
756
757 dprintk("NFS call fsinfo\n");
758 nfs_fattr_init(info->fattr);
759 status = rpc_call_sync(client, &msg, 0);
760 dprintk("NFS reply fsinfo: %d\n", status);
761 return status;
762}
763
764/*
765 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
766 * nfs_create_server
767 */
768static int
769nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
770 struct nfs_fsinfo *info)
771{
772 int status;
773
774 status = do_proc_fsinfo(server->client, fhandle, info);
775 if (status && server->nfs_client->cl_rpcclient != server->client)
776 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
777 return status;
778}
779
780static int
781nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
782 struct nfs_pathconf *info)
783{
784 struct rpc_message msg = {
785 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
786 .rpc_argp = fhandle,
787 .rpc_resp = info,
788 };
789 int status;
790
791 dprintk("NFS call pathconf\n");
792 nfs_fattr_init(info->fattr);
793 status = rpc_call_sync(server->client, &msg, 0);
794 dprintk("NFS reply pathconf: %d\n", status);
795 return status;
796}
797
798static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
799{
800 struct inode *inode = data->header->inode;
801
802 if (nfs3_async_handle_jukebox(task, inode))
803 return -EAGAIN;
804
805 nfs_invalidate_atime(inode);
806 nfs_refresh_inode(inode, &data->fattr);
807 return 0;
808}
809
810static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
811{
812 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
813}
814
815static int nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
816{
817 rpc_call_start(task);
818 return 0;
819}
820
821static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
822{
823 struct inode *inode = data->header->inode;
824
825 if (nfs3_async_handle_jukebox(task, inode))
826 return -EAGAIN;
827 if (task->tk_status >= 0)
828 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
829 return 0;
830}
831
832static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
833{
834 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
835}
836
837static int nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
838{
839 rpc_call_start(task);
840 return 0;
841}
842
843static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
844{
845 rpc_call_start(task);
846}
847
848static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
849{
850 if (nfs3_async_handle_jukebox(task, data->inode))
851 return -EAGAIN;
852 nfs_refresh_inode(data->inode, data->res.fattr);
853 return 0;
854}
855
856static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
857{
858 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
859}
860
861static int
862nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
863{
864 struct inode *inode = file_inode(filp);
865
866 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
867}
868
869static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
870{
871 return 0;
872}
873
874static int nfs3_return_delegation(struct inode *inode)
875{
876 nfs_wb_all(inode);
877 return 0;
878}
879
880static const struct inode_operations nfs3_dir_inode_operations = {
881 .create = nfs_create,
882 .lookup = nfs_lookup,
883 .link = nfs_link,
884 .unlink = nfs_unlink,
885 .symlink = nfs_symlink,
886 .mkdir = nfs_mkdir,
887 .rmdir = nfs_rmdir,
888 .mknod = nfs_mknod,
889 .rename = nfs_rename,
890 .permission = nfs_permission,
891 .getattr = nfs_getattr,
892 .setattr = nfs_setattr,
893#ifdef CONFIG_NFS_V3_ACL
894 .listxattr = generic_listxattr,
895 .getxattr = generic_getxattr,
896 .setxattr = generic_setxattr,
897 .removexattr = generic_removexattr,
898 .get_acl = nfs3_get_acl,
899 .set_acl = nfs3_set_acl,
900#endif
901};
902
903static const struct inode_operations nfs3_file_inode_operations = {
904 .permission = nfs_permission,
905 .getattr = nfs_getattr,
906 .setattr = nfs_setattr,
907#ifdef CONFIG_NFS_V3_ACL
908 .listxattr = generic_listxattr,
909 .getxattr = generic_getxattr,
910 .setxattr = generic_setxattr,
911 .removexattr = generic_removexattr,
912 .get_acl = nfs3_get_acl,
913 .set_acl = nfs3_set_acl,
914#endif
915};
916
917const struct nfs_rpc_ops nfs_v3_clientops = {
918 .version = 3, /* protocol version */
919 .dentry_ops = &nfs_dentry_operations,
920 .dir_inode_ops = &nfs3_dir_inode_operations,
921 .file_inode_ops = &nfs3_file_inode_operations,
922 .file_ops = &nfs_file_operations,
923 .getroot = nfs3_proc_get_root,
924 .submount = nfs_submount,
925 .try_mount = nfs_try_mount,
926 .getattr = nfs3_proc_getattr,
927 .setattr = nfs3_proc_setattr,
928 .lookup = nfs3_proc_lookup,
929 .access = nfs3_proc_access,
930 .readlink = nfs3_proc_readlink,
931 .create = nfs3_proc_create,
932 .remove = nfs3_proc_remove,
933 .unlink_setup = nfs3_proc_unlink_setup,
934 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
935 .unlink_done = nfs3_proc_unlink_done,
936 .rename_setup = nfs3_proc_rename_setup,
937 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
938 .rename_done = nfs3_proc_rename_done,
939 .link = nfs3_proc_link,
940 .symlink = nfs3_proc_symlink,
941 .mkdir = nfs3_proc_mkdir,
942 .rmdir = nfs3_proc_rmdir,
943 .readdir = nfs3_proc_readdir,
944 .mknod = nfs3_proc_mknod,
945 .statfs = nfs3_proc_statfs,
946 .fsinfo = nfs3_proc_fsinfo,
947 .pathconf = nfs3_proc_pathconf,
948 .decode_dirent = nfs3_decode_dirent,
949 .read_setup = nfs3_proc_read_setup,
950 .read_pageio_init = nfs_pageio_init_read,
951 .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
952 .read_done = nfs3_read_done,
953 .write_setup = nfs3_proc_write_setup,
954 .write_pageio_init = nfs_pageio_init_write,
955 .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
956 .write_done = nfs3_write_done,
957 .commit_setup = nfs3_proc_commit_setup,
958 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
959 .commit_done = nfs3_commit_done,
960 .lock = nfs3_proc_lock,
961 .clear_acl_cache = forget_all_cached_acls,
962 .close_context = nfs_close_context,
963 .have_delegation = nfs3_have_delegation,
964 .return_delegation = nfs3_return_delegation,
965 .alloc_client = nfs_alloc_client,
966 .init_client = nfs_init_client,
967 .free_client = nfs_free_client,
968 .create_server = nfs3_create_server,
969 .clone_server = nfs3_clone_server,
970};