Loading...
1/*
2 * linux/fs/nfs/nfs3proc.c
3 *
4 * Client-side NFSv3 procedures stubs.
5 *
6 * Copyright (C) 1997, Olaf Kirch
7 */
8
9#include <linux/mm.h>
10#include <linux/errno.h>
11#include <linux/string.h>
12#include <linux/sunrpc/clnt.h>
13#include <linux/slab.h>
14#include <linux/nfs.h>
15#include <linux/nfs3.h>
16#include <linux/nfs_fs.h>
17#include <linux/nfs_page.h>
18#include <linux/lockd/bind.h>
19#include <linux/nfs_mount.h>
20#include <linux/freezer.h>
21#include <linux/xattr.h>
22
23#include "iostat.h"
24#include "internal.h"
25#include "nfs3_fs.h"
26
27#define NFSDBG_FACILITY NFSDBG_PROC
28
29/* A wrapper to handle the EJUKEBOX error messages */
30static int
31nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
32{
33 int res;
34 do {
35 res = rpc_call_sync(clnt, msg, flags);
36 if (res != -EJUKEBOX)
37 break;
38 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
39 res = -ERESTARTSYS;
40 } while (!fatal_signal_pending(current));
41 return res;
42}
43
44#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
45
46static int
47nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
48{
49 if (task->tk_status != -EJUKEBOX)
50 return 0;
51 if (task->tk_status == -EJUKEBOX)
52 nfs_inc_stats(inode, NFSIOS_DELAY);
53 task->tk_status = 0;
54 rpc_restart_call(task);
55 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
56 return 1;
57}
58
59static int
60do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
61 struct nfs_fsinfo *info)
62{
63 struct rpc_message msg = {
64 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
65 .rpc_argp = fhandle,
66 .rpc_resp = info,
67 };
68 int status;
69
70 dprintk("%s: call fsinfo\n", __func__);
71 nfs_fattr_init(info->fattr);
72 status = rpc_call_sync(client, &msg, 0);
73 dprintk("%s: reply fsinfo: %d\n", __func__, status);
74 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
75 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
76 msg.rpc_resp = info->fattr;
77 status = rpc_call_sync(client, &msg, 0);
78 dprintk("%s: reply getattr: %d\n", __func__, status);
79 }
80 return status;
81}
82
83/*
84 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
85 */
86static int
87nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
88 struct nfs_fsinfo *info)
89{
90 int status;
91
92 status = do_proc_get_root(server->client, fhandle, info);
93 if (status && server->nfs_client->cl_rpcclient != server->client)
94 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
95 return status;
96}
97
98/*
99 * One function for each procedure in the NFS protocol.
100 */
101static int
102nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
103 struct nfs_fattr *fattr, struct nfs4_label *label)
104{
105 struct rpc_message msg = {
106 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
107 .rpc_argp = fhandle,
108 .rpc_resp = fattr,
109 };
110 int status;
111
112 dprintk("NFS call getattr\n");
113 nfs_fattr_init(fattr);
114 status = rpc_call_sync(server->client, &msg, 0);
115 dprintk("NFS reply getattr: %d\n", status);
116 return status;
117}
118
119static int
120nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
121 struct iattr *sattr)
122{
123 struct inode *inode = d_inode(dentry);
124 struct nfs3_sattrargs arg = {
125 .fh = NFS_FH(inode),
126 .sattr = sattr,
127 };
128 struct rpc_message msg = {
129 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
130 .rpc_argp = &arg,
131 .rpc_resp = fattr,
132 };
133 int status;
134
135 dprintk("NFS call setattr\n");
136 if (sattr->ia_valid & ATTR_FILE)
137 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
138 nfs_fattr_init(fattr);
139 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
140 if (status == 0)
141 nfs_setattr_update_inode(inode, sattr, fattr);
142 dprintk("NFS reply setattr: %d\n", status);
143 return status;
144}
145
146static int
147nfs3_proc_lookup(struct inode *dir, struct qstr *name,
148 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
149 struct nfs4_label *label)
150{
151 struct nfs3_diropargs arg = {
152 .fh = NFS_FH(dir),
153 .name = name->name,
154 .len = name->len
155 };
156 struct nfs3_diropres res = {
157 .fh = fhandle,
158 .fattr = fattr
159 };
160 struct rpc_message msg = {
161 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
162 .rpc_argp = &arg,
163 .rpc_resp = &res,
164 };
165 int status;
166
167 dprintk("NFS call lookup %s\n", name->name);
168 res.dir_attr = nfs_alloc_fattr();
169 if (res.dir_attr == NULL)
170 return -ENOMEM;
171
172 nfs_fattr_init(fattr);
173 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
174 nfs_refresh_inode(dir, res.dir_attr);
175 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
176 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
177 msg.rpc_argp = fhandle;
178 msg.rpc_resp = fattr;
179 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
180 }
181 nfs_free_fattr(res.dir_attr);
182 dprintk("NFS reply lookup: %d\n", status);
183 return status;
184}
185
186static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
187{
188 struct nfs3_accessargs arg = {
189 .fh = NFS_FH(inode),
190 };
191 struct nfs3_accessres res;
192 struct rpc_message msg = {
193 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
194 .rpc_argp = &arg,
195 .rpc_resp = &res,
196 .rpc_cred = entry->cred,
197 };
198 int mode = entry->mask;
199 int status = -ENOMEM;
200
201 dprintk("NFS call access\n");
202
203 if (mode & MAY_READ)
204 arg.access |= NFS3_ACCESS_READ;
205 if (S_ISDIR(inode->i_mode)) {
206 if (mode & MAY_WRITE)
207 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
208 if (mode & MAY_EXEC)
209 arg.access |= NFS3_ACCESS_LOOKUP;
210 } else {
211 if (mode & MAY_WRITE)
212 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
213 if (mode & MAY_EXEC)
214 arg.access |= NFS3_ACCESS_EXECUTE;
215 }
216
217 res.fattr = nfs_alloc_fattr();
218 if (res.fattr == NULL)
219 goto out;
220
221 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
222 nfs_refresh_inode(inode, res.fattr);
223 if (status == 0) {
224 entry->mask = 0;
225 if (res.access & NFS3_ACCESS_READ)
226 entry->mask |= MAY_READ;
227 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
228 entry->mask |= MAY_WRITE;
229 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
230 entry->mask |= MAY_EXEC;
231 }
232 nfs_free_fattr(res.fattr);
233out:
234 dprintk("NFS reply access: %d\n", status);
235 return status;
236}
237
238static int nfs3_proc_readlink(struct inode *inode, struct page *page,
239 unsigned int pgbase, unsigned int pglen)
240{
241 struct nfs_fattr *fattr;
242 struct nfs3_readlinkargs args = {
243 .fh = NFS_FH(inode),
244 .pgbase = pgbase,
245 .pglen = pglen,
246 .pages = &page
247 };
248 struct rpc_message msg = {
249 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
250 .rpc_argp = &args,
251 };
252 int status = -ENOMEM;
253
254 dprintk("NFS call readlink\n");
255 fattr = nfs_alloc_fattr();
256 if (fattr == NULL)
257 goto out;
258 msg.rpc_resp = fattr;
259
260 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
261 nfs_refresh_inode(inode, fattr);
262 nfs_free_fattr(fattr);
263out:
264 dprintk("NFS reply readlink: %d\n", status);
265 return status;
266}
267
268struct nfs3_createdata {
269 struct rpc_message msg;
270 union {
271 struct nfs3_createargs create;
272 struct nfs3_mkdirargs mkdir;
273 struct nfs3_symlinkargs symlink;
274 struct nfs3_mknodargs mknod;
275 } arg;
276 struct nfs3_diropres res;
277 struct nfs_fh fh;
278 struct nfs_fattr fattr;
279 struct nfs_fattr dir_attr;
280};
281
282static struct nfs3_createdata *nfs3_alloc_createdata(void)
283{
284 struct nfs3_createdata *data;
285
286 data = kzalloc(sizeof(*data), GFP_KERNEL);
287 if (data != NULL) {
288 data->msg.rpc_argp = &data->arg;
289 data->msg.rpc_resp = &data->res;
290 data->res.fh = &data->fh;
291 data->res.fattr = &data->fattr;
292 data->res.dir_attr = &data->dir_attr;
293 nfs_fattr_init(data->res.fattr);
294 nfs_fattr_init(data->res.dir_attr);
295 }
296 return data;
297}
298
299static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
300{
301 int status;
302
303 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
304 nfs_post_op_update_inode(dir, data->res.dir_attr);
305 if (status == 0)
306 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
307 return status;
308}
309
310static void nfs3_free_createdata(struct nfs3_createdata *data)
311{
312 kfree(data);
313}
314
315/*
316 * Create a regular file.
317 */
318static int
319nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
320 int flags)
321{
322 struct posix_acl *default_acl, *acl;
323 struct nfs3_createdata *data;
324 int status = -ENOMEM;
325
326 dprintk("NFS call create %pd\n", dentry);
327
328 data = nfs3_alloc_createdata();
329 if (data == NULL)
330 goto out;
331
332 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
333 data->arg.create.fh = NFS_FH(dir);
334 data->arg.create.name = dentry->d_name.name;
335 data->arg.create.len = dentry->d_name.len;
336 data->arg.create.sattr = sattr;
337
338 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
339 if (flags & O_EXCL) {
340 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
341 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
342 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
343 }
344
345 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
346 if (status)
347 goto out;
348
349 for (;;) {
350 status = nfs3_do_create(dir, dentry, data);
351
352 if (status != -ENOTSUPP)
353 break;
354 /* If the server doesn't support the exclusive creation
355 * semantics, try again with simple 'guarded' mode. */
356 switch (data->arg.create.createmode) {
357 case NFS3_CREATE_EXCLUSIVE:
358 data->arg.create.createmode = NFS3_CREATE_GUARDED;
359 break;
360
361 case NFS3_CREATE_GUARDED:
362 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
363 break;
364
365 case NFS3_CREATE_UNCHECKED:
366 goto out;
367 }
368 nfs_fattr_init(data->res.dir_attr);
369 nfs_fattr_init(data->res.fattr);
370 }
371
372 if (status != 0)
373 goto out_release_acls;
374
375 /* When we created the file with exclusive semantics, make
376 * sure we set the attributes afterwards. */
377 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
378 dprintk("NFS call setattr (post-create)\n");
379
380 if (!(sattr->ia_valid & ATTR_ATIME_SET))
381 sattr->ia_valid |= ATTR_ATIME;
382 if (!(sattr->ia_valid & ATTR_MTIME_SET))
383 sattr->ia_valid |= ATTR_MTIME;
384
385 /* Note: we could use a guarded setattr here, but I'm
386 * not sure this buys us anything (and I'd have
387 * to revamp the NFSv3 XDR code) */
388 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
389 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
390 dprintk("NFS reply setattr (post-create): %d\n", status);
391 if (status != 0)
392 goto out_release_acls;
393 }
394
395 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
396
397out_release_acls:
398 posix_acl_release(acl);
399 posix_acl_release(default_acl);
400out:
401 nfs3_free_createdata(data);
402 dprintk("NFS reply create: %d\n", status);
403 return status;
404}
405
406static int
407nfs3_proc_remove(struct inode *dir, struct qstr *name)
408{
409 struct nfs_removeargs arg = {
410 .fh = NFS_FH(dir),
411 .name = *name,
412 };
413 struct nfs_removeres res;
414 struct rpc_message msg = {
415 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
416 .rpc_argp = &arg,
417 .rpc_resp = &res,
418 };
419 int status = -ENOMEM;
420
421 dprintk("NFS call remove %s\n", name->name);
422 res.dir_attr = nfs_alloc_fattr();
423 if (res.dir_attr == NULL)
424 goto out;
425
426 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
427 nfs_post_op_update_inode(dir, res.dir_attr);
428 nfs_free_fattr(res.dir_attr);
429out:
430 dprintk("NFS reply remove: %d\n", status);
431 return status;
432}
433
434static void
435nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
436{
437 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
438}
439
440static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
441{
442 rpc_call_start(task);
443}
444
445static int
446nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
447{
448 struct nfs_removeres *res;
449 if (nfs3_async_handle_jukebox(task, dir))
450 return 0;
451 res = task->tk_msg.rpc_resp;
452 nfs_post_op_update_inode(dir, res->dir_attr);
453 return 1;
454}
455
456static void
457nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
458{
459 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
460}
461
462static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
463{
464 rpc_call_start(task);
465}
466
467static int
468nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
469 struct inode *new_dir)
470{
471 struct nfs_renameres *res;
472
473 if (nfs3_async_handle_jukebox(task, old_dir))
474 return 0;
475 res = task->tk_msg.rpc_resp;
476
477 nfs_post_op_update_inode(old_dir, res->old_fattr);
478 nfs_post_op_update_inode(new_dir, res->new_fattr);
479 return 1;
480}
481
482static int
483nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
484{
485 struct nfs3_linkargs arg = {
486 .fromfh = NFS_FH(inode),
487 .tofh = NFS_FH(dir),
488 .toname = name->name,
489 .tolen = name->len
490 };
491 struct nfs3_linkres res;
492 struct rpc_message msg = {
493 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
494 .rpc_argp = &arg,
495 .rpc_resp = &res,
496 };
497 int status = -ENOMEM;
498
499 dprintk("NFS call link %s\n", name->name);
500 res.fattr = nfs_alloc_fattr();
501 res.dir_attr = nfs_alloc_fattr();
502 if (res.fattr == NULL || res.dir_attr == NULL)
503 goto out;
504
505 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
506 nfs_post_op_update_inode(dir, res.dir_attr);
507 nfs_post_op_update_inode(inode, res.fattr);
508out:
509 nfs_free_fattr(res.dir_attr);
510 nfs_free_fattr(res.fattr);
511 dprintk("NFS reply link: %d\n", status);
512 return status;
513}
514
515static int
516nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
517 unsigned int len, struct iattr *sattr)
518{
519 struct nfs3_createdata *data;
520 int status = -ENOMEM;
521
522 if (len > NFS3_MAXPATHLEN)
523 return -ENAMETOOLONG;
524
525 dprintk("NFS call symlink %pd\n", dentry);
526
527 data = nfs3_alloc_createdata();
528 if (data == NULL)
529 goto out;
530 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
531 data->arg.symlink.fromfh = NFS_FH(dir);
532 data->arg.symlink.fromname = dentry->d_name.name;
533 data->arg.symlink.fromlen = dentry->d_name.len;
534 data->arg.symlink.pages = &page;
535 data->arg.symlink.pathlen = len;
536 data->arg.symlink.sattr = sattr;
537
538 status = nfs3_do_create(dir, dentry, data);
539
540 nfs3_free_createdata(data);
541out:
542 dprintk("NFS reply symlink: %d\n", status);
543 return status;
544}
545
546static int
547nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
548{
549 struct posix_acl *default_acl, *acl;
550 struct nfs3_createdata *data;
551 int status = -ENOMEM;
552
553 dprintk("NFS call mkdir %pd\n", dentry);
554
555 data = nfs3_alloc_createdata();
556 if (data == NULL)
557 goto out;
558
559 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
560 if (status)
561 goto out;
562
563 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
564 data->arg.mkdir.fh = NFS_FH(dir);
565 data->arg.mkdir.name = dentry->d_name.name;
566 data->arg.mkdir.len = dentry->d_name.len;
567 data->arg.mkdir.sattr = sattr;
568
569 status = nfs3_do_create(dir, dentry, data);
570 if (status != 0)
571 goto out_release_acls;
572
573 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
574
575out_release_acls:
576 posix_acl_release(acl);
577 posix_acl_release(default_acl);
578out:
579 nfs3_free_createdata(data);
580 dprintk("NFS reply mkdir: %d\n", status);
581 return status;
582}
583
584static int
585nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
586{
587 struct nfs_fattr *dir_attr;
588 struct nfs3_diropargs arg = {
589 .fh = NFS_FH(dir),
590 .name = name->name,
591 .len = name->len
592 };
593 struct rpc_message msg = {
594 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
595 .rpc_argp = &arg,
596 };
597 int status = -ENOMEM;
598
599 dprintk("NFS call rmdir %s\n", name->name);
600 dir_attr = nfs_alloc_fattr();
601 if (dir_attr == NULL)
602 goto out;
603
604 msg.rpc_resp = dir_attr;
605 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
606 nfs_post_op_update_inode(dir, dir_attr);
607 nfs_free_fattr(dir_attr);
608out:
609 dprintk("NFS reply rmdir: %d\n", status);
610 return status;
611}
612
613/*
614 * The READDIR implementation is somewhat hackish - we pass the user buffer
615 * to the encode function, which installs it in the receive iovec.
616 * The decode function itself doesn't perform any decoding, it just makes
617 * sure the reply is syntactically correct.
618 *
619 * Also note that this implementation handles both plain readdir and
620 * readdirplus.
621 */
622static int
623nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
624 u64 cookie, struct page **pages, unsigned int count, int plus)
625{
626 struct inode *dir = d_inode(dentry);
627 __be32 *verf = NFS_I(dir)->cookieverf;
628 struct nfs3_readdirargs arg = {
629 .fh = NFS_FH(dir),
630 .cookie = cookie,
631 .verf = {verf[0], verf[1]},
632 .plus = plus,
633 .count = count,
634 .pages = pages
635 };
636 struct nfs3_readdirres res = {
637 .verf = verf,
638 .plus = plus
639 };
640 struct rpc_message msg = {
641 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
642 .rpc_argp = &arg,
643 .rpc_resp = &res,
644 .rpc_cred = cred
645 };
646 int status = -ENOMEM;
647
648 if (plus)
649 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
650
651 dprintk("NFS call readdir%s %d\n",
652 plus? "plus" : "", (unsigned int) cookie);
653
654 res.dir_attr = nfs_alloc_fattr();
655 if (res.dir_attr == NULL)
656 goto out;
657
658 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
659
660 nfs_invalidate_atime(dir);
661 nfs_refresh_inode(dir, res.dir_attr);
662
663 nfs_free_fattr(res.dir_attr);
664out:
665 dprintk("NFS reply readdir%s: %d\n",
666 plus? "plus" : "", status);
667 return status;
668}
669
670static int
671nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
672 dev_t rdev)
673{
674 struct posix_acl *default_acl, *acl;
675 struct nfs3_createdata *data;
676 int status = -ENOMEM;
677
678 dprintk("NFS call mknod %pd %u:%u\n", dentry,
679 MAJOR(rdev), MINOR(rdev));
680
681 data = nfs3_alloc_createdata();
682 if (data == NULL)
683 goto out;
684
685 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
686 if (status)
687 goto out;
688
689 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
690 data->arg.mknod.fh = NFS_FH(dir);
691 data->arg.mknod.name = dentry->d_name.name;
692 data->arg.mknod.len = dentry->d_name.len;
693 data->arg.mknod.sattr = sattr;
694 data->arg.mknod.rdev = rdev;
695
696 switch (sattr->ia_mode & S_IFMT) {
697 case S_IFBLK:
698 data->arg.mknod.type = NF3BLK;
699 break;
700 case S_IFCHR:
701 data->arg.mknod.type = NF3CHR;
702 break;
703 case S_IFIFO:
704 data->arg.mknod.type = NF3FIFO;
705 break;
706 case S_IFSOCK:
707 data->arg.mknod.type = NF3SOCK;
708 break;
709 default:
710 status = -EINVAL;
711 goto out;
712 }
713
714 status = nfs3_do_create(dir, dentry, data);
715 if (status != 0)
716 goto out_release_acls;
717
718 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
719
720out_release_acls:
721 posix_acl_release(acl);
722 posix_acl_release(default_acl);
723out:
724 nfs3_free_createdata(data);
725 dprintk("NFS reply mknod: %d\n", status);
726 return status;
727}
728
729static int
730nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
731 struct nfs_fsstat *stat)
732{
733 struct rpc_message msg = {
734 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
735 .rpc_argp = fhandle,
736 .rpc_resp = stat,
737 };
738 int status;
739
740 dprintk("NFS call fsstat\n");
741 nfs_fattr_init(stat->fattr);
742 status = rpc_call_sync(server->client, &msg, 0);
743 dprintk("NFS reply fsstat: %d\n", status);
744 return status;
745}
746
747static int
748do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
749 struct nfs_fsinfo *info)
750{
751 struct rpc_message msg = {
752 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
753 .rpc_argp = fhandle,
754 .rpc_resp = info,
755 };
756 int status;
757
758 dprintk("NFS call fsinfo\n");
759 nfs_fattr_init(info->fattr);
760 status = rpc_call_sync(client, &msg, 0);
761 dprintk("NFS reply fsinfo: %d\n", status);
762 return status;
763}
764
765/*
766 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
767 * nfs_create_server
768 */
769static int
770nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
771 struct nfs_fsinfo *info)
772{
773 int status;
774
775 status = do_proc_fsinfo(server->client, fhandle, info);
776 if (status && server->nfs_client->cl_rpcclient != server->client)
777 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
778 return status;
779}
780
781static int
782nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
783 struct nfs_pathconf *info)
784{
785 struct rpc_message msg = {
786 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
787 .rpc_argp = fhandle,
788 .rpc_resp = info,
789 };
790 int status;
791
792 dprintk("NFS call pathconf\n");
793 nfs_fattr_init(info->fattr);
794 status = rpc_call_sync(server->client, &msg, 0);
795 dprintk("NFS reply pathconf: %d\n", status);
796 return status;
797}
798
799static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
800{
801 struct inode *inode = hdr->inode;
802
803 if (hdr->pgio_done_cb != NULL)
804 return hdr->pgio_done_cb(task, hdr);
805
806 if (nfs3_async_handle_jukebox(task, inode))
807 return -EAGAIN;
808
809 nfs_invalidate_atime(inode);
810 nfs_refresh_inode(inode, &hdr->fattr);
811 return 0;
812}
813
814static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
815 struct rpc_message *msg)
816{
817 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
818}
819
820static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
821 struct nfs_pgio_header *hdr)
822{
823 rpc_call_start(task);
824 return 0;
825}
826
827static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
828{
829 struct inode *inode = hdr->inode;
830
831 if (hdr->pgio_done_cb != NULL)
832 return hdr->pgio_done_cb(task, hdr);
833
834 if (nfs3_async_handle_jukebox(task, inode))
835 return -EAGAIN;
836 if (task->tk_status >= 0)
837 nfs_writeback_update_inode(hdr);
838 return 0;
839}
840
841static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
842 struct rpc_message *msg)
843{
844 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
845}
846
847static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
848{
849 rpc_call_start(task);
850}
851
852static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
853{
854 if (data->commit_done_cb != NULL)
855 return data->commit_done_cb(task, data);
856
857 if (nfs3_async_handle_jukebox(task, data->inode))
858 return -EAGAIN;
859 nfs_refresh_inode(data->inode, data->res.fattr);
860 return 0;
861}
862
863static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
864{
865 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
866}
867
868static int
869nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
870{
871 struct inode *inode = file_inode(filp);
872
873 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
874}
875
876static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
877{
878 return 0;
879}
880
881static int nfs3_return_delegation(struct inode *inode)
882{
883 nfs_wb_all(inode);
884 return 0;
885}
886
887static const struct inode_operations nfs3_dir_inode_operations = {
888 .create = nfs_create,
889 .lookup = nfs_lookup,
890 .link = nfs_link,
891 .unlink = nfs_unlink,
892 .symlink = nfs_symlink,
893 .mkdir = nfs_mkdir,
894 .rmdir = nfs_rmdir,
895 .mknod = nfs_mknod,
896 .rename = nfs_rename,
897 .permission = nfs_permission,
898 .getattr = nfs_getattr,
899 .setattr = nfs_setattr,
900#ifdef CONFIG_NFS_V3_ACL
901 .listxattr = nfs3_listxattr,
902 .getxattr = generic_getxattr,
903 .setxattr = generic_setxattr,
904 .removexattr = generic_removexattr,
905 .get_acl = nfs3_get_acl,
906 .set_acl = nfs3_set_acl,
907#endif
908};
909
910static const struct inode_operations nfs3_file_inode_operations = {
911 .permission = nfs_permission,
912 .getattr = nfs_getattr,
913 .setattr = nfs_setattr,
914#ifdef CONFIG_NFS_V3_ACL
915 .listxattr = nfs3_listxattr,
916 .getxattr = generic_getxattr,
917 .setxattr = generic_setxattr,
918 .removexattr = generic_removexattr,
919 .get_acl = nfs3_get_acl,
920 .set_acl = nfs3_set_acl,
921#endif
922};
923
924const struct nfs_rpc_ops nfs_v3_clientops = {
925 .version = 3, /* protocol version */
926 .dentry_ops = &nfs_dentry_operations,
927 .dir_inode_ops = &nfs3_dir_inode_operations,
928 .file_inode_ops = &nfs3_file_inode_operations,
929 .file_ops = &nfs_file_operations,
930 .getroot = nfs3_proc_get_root,
931 .submount = nfs_submount,
932 .try_mount = nfs_try_mount,
933 .getattr = nfs3_proc_getattr,
934 .setattr = nfs3_proc_setattr,
935 .lookup = nfs3_proc_lookup,
936 .access = nfs3_proc_access,
937 .readlink = nfs3_proc_readlink,
938 .create = nfs3_proc_create,
939 .remove = nfs3_proc_remove,
940 .unlink_setup = nfs3_proc_unlink_setup,
941 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
942 .unlink_done = nfs3_proc_unlink_done,
943 .rename_setup = nfs3_proc_rename_setup,
944 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
945 .rename_done = nfs3_proc_rename_done,
946 .link = nfs3_proc_link,
947 .symlink = nfs3_proc_symlink,
948 .mkdir = nfs3_proc_mkdir,
949 .rmdir = nfs3_proc_rmdir,
950 .readdir = nfs3_proc_readdir,
951 .mknod = nfs3_proc_mknod,
952 .statfs = nfs3_proc_statfs,
953 .fsinfo = nfs3_proc_fsinfo,
954 .pathconf = nfs3_proc_pathconf,
955 .decode_dirent = nfs3_decode_dirent,
956 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
957 .read_setup = nfs3_proc_read_setup,
958 .read_done = nfs3_read_done,
959 .write_setup = nfs3_proc_write_setup,
960 .write_done = nfs3_write_done,
961 .commit_setup = nfs3_proc_commit_setup,
962 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
963 .commit_done = nfs3_commit_done,
964 .lock = nfs3_proc_lock,
965 .clear_acl_cache = forget_all_cached_acls,
966 .close_context = nfs_close_context,
967 .have_delegation = nfs3_have_delegation,
968 .return_delegation = nfs3_return_delegation,
969 .alloc_client = nfs_alloc_client,
970 .init_client = nfs_init_client,
971 .free_client = nfs_free_client,
972 .create_server = nfs3_create_server,
973 .clone_server = nfs3_clone_server,
974};
1/*
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
22#include "iostat.h"
23#include "internal.h"
24
25#define NFSDBG_FACILITY NFSDBG_PROC
26
27/* A wrapper to handle the EJUKEBOX and EKEYEXPIRED error messages */
28static int
29nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
30{
31 int res;
32 do {
33 res = rpc_call_sync(clnt, msg, flags);
34 if (res != -EJUKEBOX && res != -EKEYEXPIRED)
35 break;
36 freezable_schedule_timeout_killable(NFS_JUKEBOX_RETRY_TIME);
37 res = -ERESTARTSYS;
38 } while (!fatal_signal_pending(current));
39 return res;
40}
41
42#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
43
44static int
45nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
46{
47 if (task->tk_status != -EJUKEBOX && task->tk_status != -EKEYEXPIRED)
48 return 0;
49 if (task->tk_status == -EJUKEBOX)
50 nfs_inc_stats(inode, NFSIOS_DELAY);
51 task->tk_status = 0;
52 rpc_restart_call(task);
53 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
54 return 1;
55}
56
57static int
58do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
59 struct nfs_fsinfo *info)
60{
61 struct rpc_message msg = {
62 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
63 .rpc_argp = fhandle,
64 .rpc_resp = info,
65 };
66 int status;
67
68 dprintk("%s: call fsinfo\n", __func__);
69 nfs_fattr_init(info->fattr);
70 status = rpc_call_sync(client, &msg, 0);
71 dprintk("%s: reply fsinfo: %d\n", __func__, status);
72 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
73 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
74 msg.rpc_resp = info->fattr;
75 status = rpc_call_sync(client, &msg, 0);
76 dprintk("%s: reply getattr: %d\n", __func__, status);
77 }
78 return status;
79}
80
81/*
82 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
83 */
84static int
85nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
86 struct nfs_fsinfo *info)
87{
88 int status;
89
90 status = do_proc_get_root(server->client, fhandle, info);
91 if (status && server->nfs_client->cl_rpcclient != server->client)
92 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
93 return status;
94}
95
96/*
97 * One function for each procedure in the NFS protocol.
98 */
99static int
100nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
101 struct nfs_fattr *fattr)
102{
103 struct rpc_message msg = {
104 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
105 .rpc_argp = fhandle,
106 .rpc_resp = fattr,
107 };
108 int status;
109
110 dprintk("NFS call getattr\n");
111 nfs_fattr_init(fattr);
112 status = rpc_call_sync(server->client, &msg, 0);
113 dprintk("NFS reply getattr: %d\n", status);
114 return status;
115}
116
117static int
118nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
119 struct iattr *sattr)
120{
121 struct inode *inode = dentry->d_inode;
122 struct nfs3_sattrargs arg = {
123 .fh = NFS_FH(inode),
124 .sattr = sattr,
125 };
126 struct rpc_message msg = {
127 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
128 .rpc_argp = &arg,
129 .rpc_resp = fattr,
130 };
131 int status;
132
133 dprintk("NFS call setattr\n");
134 if (sattr->ia_valid & ATTR_FILE)
135 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
136 nfs_fattr_init(fattr);
137 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
138 if (status == 0)
139 nfs_setattr_update_inode(inode, sattr);
140 dprintk("NFS reply setattr: %d\n", status);
141 return status;
142}
143
144static int
145nfs3_proc_lookup(struct inode *dir, struct qstr *name,
146 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
147{
148 struct nfs3_diropargs arg = {
149 .fh = NFS_FH(dir),
150 .name = name->name,
151 .len = name->len
152 };
153 struct nfs3_diropres res = {
154 .fh = fhandle,
155 .fattr = fattr
156 };
157 struct rpc_message msg = {
158 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
159 .rpc_argp = &arg,
160 .rpc_resp = &res,
161 };
162 int status;
163
164 dprintk("NFS call lookup %s\n", name->name);
165 res.dir_attr = nfs_alloc_fattr();
166 if (res.dir_attr == NULL)
167 return -ENOMEM;
168
169 nfs_fattr_init(fattr);
170 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
171 nfs_refresh_inode(dir, res.dir_attr);
172 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
173 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
174 msg.rpc_argp = fhandle;
175 msg.rpc_resp = fattr;
176 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
177 }
178 nfs_free_fattr(res.dir_attr);
179 dprintk("NFS reply lookup: %d\n", status);
180 return status;
181}
182
183static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
184{
185 struct nfs3_accessargs arg = {
186 .fh = NFS_FH(inode),
187 };
188 struct nfs3_accessres res;
189 struct rpc_message msg = {
190 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
191 .rpc_argp = &arg,
192 .rpc_resp = &res,
193 .rpc_cred = entry->cred,
194 };
195 int mode = entry->mask;
196 int status = -ENOMEM;
197
198 dprintk("NFS call access\n");
199
200 if (mode & MAY_READ)
201 arg.access |= NFS3_ACCESS_READ;
202 if (S_ISDIR(inode->i_mode)) {
203 if (mode & MAY_WRITE)
204 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE;
205 if (mode & MAY_EXEC)
206 arg.access |= NFS3_ACCESS_LOOKUP;
207 } else {
208 if (mode & MAY_WRITE)
209 arg.access |= NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND;
210 if (mode & MAY_EXEC)
211 arg.access |= NFS3_ACCESS_EXECUTE;
212 }
213
214 res.fattr = nfs_alloc_fattr();
215 if (res.fattr == NULL)
216 goto out;
217
218 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
219 nfs_refresh_inode(inode, res.fattr);
220 if (status == 0) {
221 entry->mask = 0;
222 if (res.access & NFS3_ACCESS_READ)
223 entry->mask |= MAY_READ;
224 if (res.access & (NFS3_ACCESS_MODIFY | NFS3_ACCESS_EXTEND | NFS3_ACCESS_DELETE))
225 entry->mask |= MAY_WRITE;
226 if (res.access & (NFS3_ACCESS_LOOKUP|NFS3_ACCESS_EXECUTE))
227 entry->mask |= MAY_EXEC;
228 }
229 nfs_free_fattr(res.fattr);
230out:
231 dprintk("NFS reply access: %d\n", status);
232 return status;
233}
234
235static int nfs3_proc_readlink(struct inode *inode, struct page *page,
236 unsigned int pgbase, unsigned int pglen)
237{
238 struct nfs_fattr *fattr;
239 struct nfs3_readlinkargs args = {
240 .fh = NFS_FH(inode),
241 .pgbase = pgbase,
242 .pglen = pglen,
243 .pages = &page
244 };
245 struct rpc_message msg = {
246 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
247 .rpc_argp = &args,
248 };
249 int status = -ENOMEM;
250
251 dprintk("NFS call readlink\n");
252 fattr = nfs_alloc_fattr();
253 if (fattr == NULL)
254 goto out;
255 msg.rpc_resp = fattr;
256
257 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
258 nfs_refresh_inode(inode, fattr);
259 nfs_free_fattr(fattr);
260out:
261 dprintk("NFS reply readlink: %d\n", status);
262 return status;
263}
264
265struct nfs3_createdata {
266 struct rpc_message msg;
267 union {
268 struct nfs3_createargs create;
269 struct nfs3_mkdirargs mkdir;
270 struct nfs3_symlinkargs symlink;
271 struct nfs3_mknodargs mknod;
272 } arg;
273 struct nfs3_diropres res;
274 struct nfs_fh fh;
275 struct nfs_fattr fattr;
276 struct nfs_fattr dir_attr;
277};
278
279static struct nfs3_createdata *nfs3_alloc_createdata(void)
280{
281 struct nfs3_createdata *data;
282
283 data = kzalloc(sizeof(*data), GFP_KERNEL);
284 if (data != NULL) {
285 data->msg.rpc_argp = &data->arg;
286 data->msg.rpc_resp = &data->res;
287 data->res.fh = &data->fh;
288 data->res.fattr = &data->fattr;
289 data->res.dir_attr = &data->dir_attr;
290 nfs_fattr_init(data->res.fattr);
291 nfs_fattr_init(data->res.dir_attr);
292 }
293 return data;
294}
295
296static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
297{
298 int status;
299
300 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
301 nfs_post_op_update_inode(dir, data->res.dir_attr);
302 if (status == 0)
303 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
304 return status;
305}
306
307static void nfs3_free_createdata(struct nfs3_createdata *data)
308{
309 kfree(data);
310}
311
312/*
313 * Create a regular file.
314 */
315static int
316nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
317 int flags, struct nfs_open_context *ctx)
318{
319 struct nfs3_createdata *data;
320 umode_t mode = sattr->ia_mode;
321 int status = -ENOMEM;
322
323 dprintk("NFS call create %s\n", dentry->d_name.name);
324
325 data = nfs3_alloc_createdata();
326 if (data == NULL)
327 goto out;
328
329 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
330 data->arg.create.fh = NFS_FH(dir);
331 data->arg.create.name = dentry->d_name.name;
332 data->arg.create.len = dentry->d_name.len;
333 data->arg.create.sattr = sattr;
334
335 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
336 if (flags & O_EXCL) {
337 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
338 data->arg.create.verifier[0] = jiffies;
339 data->arg.create.verifier[1] = current->pid;
340 }
341
342 sattr->ia_mode &= ~current_umask();
343
344 for (;;) {
345 status = nfs3_do_create(dir, dentry, data);
346
347 if (status != -ENOTSUPP)
348 break;
349 /* If the server doesn't support the exclusive creation
350 * semantics, try again with simple 'guarded' mode. */
351 switch (data->arg.create.createmode) {
352 case NFS3_CREATE_EXCLUSIVE:
353 data->arg.create.createmode = NFS3_CREATE_GUARDED;
354 break;
355
356 case NFS3_CREATE_GUARDED:
357 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
358 break;
359
360 case NFS3_CREATE_UNCHECKED:
361 goto out;
362 }
363 nfs_fattr_init(data->res.dir_attr);
364 nfs_fattr_init(data->res.fattr);
365 }
366
367 if (status != 0)
368 goto out;
369
370 /* When we created the file with exclusive semantics, make
371 * sure we set the attributes afterwards. */
372 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
373 dprintk("NFS call setattr (post-create)\n");
374
375 if (!(sattr->ia_valid & ATTR_ATIME_SET))
376 sattr->ia_valid |= ATTR_ATIME;
377 if (!(sattr->ia_valid & ATTR_MTIME_SET))
378 sattr->ia_valid |= ATTR_MTIME;
379
380 /* Note: we could use a guarded setattr here, but I'm
381 * not sure this buys us anything (and I'd have
382 * to revamp the NFSv3 XDR code) */
383 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
384 nfs_post_op_update_inode(dentry->d_inode, data->res.fattr);
385 dprintk("NFS reply setattr (post-create): %d\n", status);
386 if (status != 0)
387 goto out;
388 }
389 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
390out:
391 nfs3_free_createdata(data);
392 dprintk("NFS reply create: %d\n", status);
393 return status;
394}
395
396static int
397nfs3_proc_remove(struct inode *dir, struct qstr *name)
398{
399 struct nfs_removeargs arg = {
400 .fh = NFS_FH(dir),
401 .name = *name,
402 };
403 struct nfs_removeres res;
404 struct rpc_message msg = {
405 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
406 .rpc_argp = &arg,
407 .rpc_resp = &res,
408 };
409 int status = -ENOMEM;
410
411 dprintk("NFS call remove %s\n", name->name);
412 res.dir_attr = nfs_alloc_fattr();
413 if (res.dir_attr == NULL)
414 goto out;
415
416 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
417 nfs_post_op_update_inode(dir, res.dir_attr);
418 nfs_free_fattr(res.dir_attr);
419out:
420 dprintk("NFS reply remove: %d\n", status);
421 return status;
422}
423
424static void
425nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
426{
427 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
428}
429
430static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
431{
432 rpc_call_start(task);
433}
434
435static int
436nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
437{
438 struct nfs_removeres *res;
439 if (nfs3_async_handle_jukebox(task, dir))
440 return 0;
441 res = task->tk_msg.rpc_resp;
442 nfs_post_op_update_inode(dir, res->dir_attr);
443 return 1;
444}
445
446static void
447nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
448{
449 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
450}
451
452static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
453{
454 rpc_call_start(task);
455}
456
457static int
458nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
459 struct inode *new_dir)
460{
461 struct nfs_renameres *res;
462
463 if (nfs3_async_handle_jukebox(task, old_dir))
464 return 0;
465 res = task->tk_msg.rpc_resp;
466
467 nfs_post_op_update_inode(old_dir, res->old_fattr);
468 nfs_post_op_update_inode(new_dir, res->new_fattr);
469 return 1;
470}
471
472static int
473nfs3_proc_rename(struct inode *old_dir, struct qstr *old_name,
474 struct inode *new_dir, struct qstr *new_name)
475{
476 struct nfs_renameargs arg = {
477 .old_dir = NFS_FH(old_dir),
478 .old_name = old_name,
479 .new_dir = NFS_FH(new_dir),
480 .new_name = new_name,
481 };
482 struct nfs_renameres res;
483 struct rpc_message msg = {
484 .rpc_proc = &nfs3_procedures[NFS3PROC_RENAME],
485 .rpc_argp = &arg,
486 .rpc_resp = &res,
487 };
488 int status = -ENOMEM;
489
490 dprintk("NFS call rename %s -> %s\n", old_name->name, new_name->name);
491
492 res.old_fattr = nfs_alloc_fattr();
493 res.new_fattr = nfs_alloc_fattr();
494 if (res.old_fattr == NULL || res.new_fattr == NULL)
495 goto out;
496
497 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
498 nfs_post_op_update_inode(old_dir, res.old_fattr);
499 nfs_post_op_update_inode(new_dir, res.new_fattr);
500out:
501 nfs_free_fattr(res.old_fattr);
502 nfs_free_fattr(res.new_fattr);
503 dprintk("NFS reply rename: %d\n", status);
504 return status;
505}
506
507static int
508nfs3_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
509{
510 struct nfs3_linkargs arg = {
511 .fromfh = NFS_FH(inode),
512 .tofh = NFS_FH(dir),
513 .toname = name->name,
514 .tolen = name->len
515 };
516 struct nfs3_linkres res;
517 struct rpc_message msg = {
518 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
519 .rpc_argp = &arg,
520 .rpc_resp = &res,
521 };
522 int status = -ENOMEM;
523
524 dprintk("NFS call link %s\n", name->name);
525 res.fattr = nfs_alloc_fattr();
526 res.dir_attr = nfs_alloc_fattr();
527 if (res.fattr == NULL || res.dir_attr == NULL)
528 goto out;
529
530 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
531 nfs_post_op_update_inode(dir, res.dir_attr);
532 nfs_post_op_update_inode(inode, res.fattr);
533out:
534 nfs_free_fattr(res.dir_attr);
535 nfs_free_fattr(res.fattr);
536 dprintk("NFS reply link: %d\n", status);
537 return status;
538}
539
540static int
541nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
542 unsigned int len, struct iattr *sattr)
543{
544 struct nfs3_createdata *data;
545 int status = -ENOMEM;
546
547 if (len > NFS3_MAXPATHLEN)
548 return -ENAMETOOLONG;
549
550 dprintk("NFS call symlink %s\n", dentry->d_name.name);
551
552 data = nfs3_alloc_createdata();
553 if (data == NULL)
554 goto out;
555 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
556 data->arg.symlink.fromfh = NFS_FH(dir);
557 data->arg.symlink.fromname = dentry->d_name.name;
558 data->arg.symlink.fromlen = dentry->d_name.len;
559 data->arg.symlink.pages = &page;
560 data->arg.symlink.pathlen = len;
561 data->arg.symlink.sattr = sattr;
562
563 status = nfs3_do_create(dir, dentry, data);
564
565 nfs3_free_createdata(data);
566out:
567 dprintk("NFS reply symlink: %d\n", status);
568 return status;
569}
570
571static int
572nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
573{
574 struct nfs3_createdata *data;
575 umode_t mode = sattr->ia_mode;
576 int status = -ENOMEM;
577
578 dprintk("NFS call mkdir %s\n", dentry->d_name.name);
579
580 sattr->ia_mode &= ~current_umask();
581
582 data = nfs3_alloc_createdata();
583 if (data == NULL)
584 goto out;
585
586 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
587 data->arg.mkdir.fh = NFS_FH(dir);
588 data->arg.mkdir.name = dentry->d_name.name;
589 data->arg.mkdir.len = dentry->d_name.len;
590 data->arg.mkdir.sattr = sattr;
591
592 status = nfs3_do_create(dir, dentry, data);
593 if (status != 0)
594 goto out;
595
596 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
597out:
598 nfs3_free_createdata(data);
599 dprintk("NFS reply mkdir: %d\n", status);
600 return status;
601}
602
603static int
604nfs3_proc_rmdir(struct inode *dir, struct qstr *name)
605{
606 struct nfs_fattr *dir_attr;
607 struct nfs3_diropargs arg = {
608 .fh = NFS_FH(dir),
609 .name = name->name,
610 .len = name->len
611 };
612 struct rpc_message msg = {
613 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
614 .rpc_argp = &arg,
615 };
616 int status = -ENOMEM;
617
618 dprintk("NFS call rmdir %s\n", name->name);
619 dir_attr = nfs_alloc_fattr();
620 if (dir_attr == NULL)
621 goto out;
622
623 msg.rpc_resp = dir_attr;
624 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
625 nfs_post_op_update_inode(dir, dir_attr);
626 nfs_free_fattr(dir_attr);
627out:
628 dprintk("NFS reply rmdir: %d\n", status);
629 return status;
630}
631
632/*
633 * The READDIR implementation is somewhat hackish - we pass the user buffer
634 * to the encode function, which installs it in the receive iovec.
635 * The decode function itself doesn't perform any decoding, it just makes
636 * sure the reply is syntactically correct.
637 *
638 * Also note that this implementation handles both plain readdir and
639 * readdirplus.
640 */
641static int
642nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
643 u64 cookie, struct page **pages, unsigned int count, int plus)
644{
645 struct inode *dir = dentry->d_inode;
646 __be32 *verf = NFS_I(dir)->cookieverf;
647 struct nfs3_readdirargs arg = {
648 .fh = NFS_FH(dir),
649 .cookie = cookie,
650 .verf = {verf[0], verf[1]},
651 .plus = plus,
652 .count = count,
653 .pages = pages
654 };
655 struct nfs3_readdirres res = {
656 .verf = verf,
657 .plus = plus
658 };
659 struct rpc_message msg = {
660 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
661 .rpc_argp = &arg,
662 .rpc_resp = &res,
663 .rpc_cred = cred
664 };
665 int status = -ENOMEM;
666
667 if (plus)
668 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
669
670 dprintk("NFS call readdir%s %d\n",
671 plus? "plus" : "", (unsigned int) cookie);
672
673 res.dir_attr = nfs_alloc_fattr();
674 if (res.dir_attr == NULL)
675 goto out;
676
677 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
678
679 nfs_invalidate_atime(dir);
680 nfs_refresh_inode(dir, res.dir_attr);
681
682 nfs_free_fattr(res.dir_attr);
683out:
684 dprintk("NFS reply readdir%s: %d\n",
685 plus? "plus" : "", status);
686 return status;
687}
688
689static int
690nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
691 dev_t rdev)
692{
693 struct nfs3_createdata *data;
694 umode_t mode = sattr->ia_mode;
695 int status = -ENOMEM;
696
697 dprintk("NFS call mknod %s %u:%u\n", dentry->d_name.name,
698 MAJOR(rdev), MINOR(rdev));
699
700 sattr->ia_mode &= ~current_umask();
701
702 data = nfs3_alloc_createdata();
703 if (data == NULL)
704 goto out;
705
706 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
707 data->arg.mknod.fh = NFS_FH(dir);
708 data->arg.mknod.name = dentry->d_name.name;
709 data->arg.mknod.len = dentry->d_name.len;
710 data->arg.mknod.sattr = sattr;
711 data->arg.mknod.rdev = rdev;
712
713 switch (sattr->ia_mode & S_IFMT) {
714 case S_IFBLK:
715 data->arg.mknod.type = NF3BLK;
716 break;
717 case S_IFCHR:
718 data->arg.mknod.type = NF3CHR;
719 break;
720 case S_IFIFO:
721 data->arg.mknod.type = NF3FIFO;
722 break;
723 case S_IFSOCK:
724 data->arg.mknod.type = NF3SOCK;
725 break;
726 default:
727 status = -EINVAL;
728 goto out;
729 }
730
731 status = nfs3_do_create(dir, dentry, data);
732 if (status != 0)
733 goto out;
734 status = nfs3_proc_set_default_acl(dir, dentry->d_inode, mode);
735out:
736 nfs3_free_createdata(data);
737 dprintk("NFS reply mknod: %d\n", status);
738 return status;
739}
740
741static int
742nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
743 struct nfs_fsstat *stat)
744{
745 struct rpc_message msg = {
746 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
747 .rpc_argp = fhandle,
748 .rpc_resp = stat,
749 };
750 int status;
751
752 dprintk("NFS call fsstat\n");
753 nfs_fattr_init(stat->fattr);
754 status = rpc_call_sync(server->client, &msg, 0);
755 dprintk("NFS reply fsstat: %d\n", status);
756 return status;
757}
758
759static int
760do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
761 struct nfs_fsinfo *info)
762{
763 struct rpc_message msg = {
764 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
765 .rpc_argp = fhandle,
766 .rpc_resp = info,
767 };
768 int status;
769
770 dprintk("NFS call fsinfo\n");
771 nfs_fattr_init(info->fattr);
772 status = rpc_call_sync(client, &msg, 0);
773 dprintk("NFS reply fsinfo: %d\n", status);
774 return status;
775}
776
777/*
778 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
779 * nfs_create_server
780 */
781static int
782nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
783 struct nfs_fsinfo *info)
784{
785 int status;
786
787 status = do_proc_fsinfo(server->client, fhandle, info);
788 if (status && server->nfs_client->cl_rpcclient != server->client)
789 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
790 return status;
791}
792
793static int
794nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
795 struct nfs_pathconf *info)
796{
797 struct rpc_message msg = {
798 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
799 .rpc_argp = fhandle,
800 .rpc_resp = info,
801 };
802 int status;
803
804 dprintk("NFS call pathconf\n");
805 nfs_fattr_init(info->fattr);
806 status = rpc_call_sync(server->client, &msg, 0);
807 dprintk("NFS reply pathconf: %d\n", status);
808 return status;
809}
810
811static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
812{
813 struct inode *inode = data->header->inode;
814
815 if (nfs3_async_handle_jukebox(task, inode))
816 return -EAGAIN;
817
818 nfs_invalidate_atime(inode);
819 nfs_refresh_inode(inode, &data->fattr);
820 return 0;
821}
822
823static void nfs3_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
824{
825 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
826}
827
828static void nfs3_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
829{
830 rpc_call_start(task);
831}
832
833static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
834{
835 struct inode *inode = data->header->inode;
836
837 if (nfs3_async_handle_jukebox(task, inode))
838 return -EAGAIN;
839 if (task->tk_status >= 0)
840 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
841 return 0;
842}
843
844static void nfs3_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
845{
846 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
847}
848
849static void nfs3_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
850{
851 rpc_call_start(task);
852}
853
854static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
855{
856 rpc_call_start(task);
857}
858
859static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
860{
861 if (nfs3_async_handle_jukebox(task, data->inode))
862 return -EAGAIN;
863 nfs_refresh_inode(data->inode, data->res.fattr);
864 return 0;
865}
866
867static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
868{
869 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
870}
871
872static int
873nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
874{
875 struct inode *inode = filp->f_path.dentry->d_inode;
876
877 return nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl);
878}
879
880const struct nfs_rpc_ops nfs_v3_clientops = {
881 .version = 3, /* protocol version */
882 .dentry_ops = &nfs_dentry_operations,
883 .dir_inode_ops = &nfs3_dir_inode_operations,
884 .file_inode_ops = &nfs3_file_inode_operations,
885 .file_ops = &nfs_file_operations,
886 .getroot = nfs3_proc_get_root,
887 .submount = nfs_submount,
888 .getattr = nfs3_proc_getattr,
889 .setattr = nfs3_proc_setattr,
890 .lookup = nfs3_proc_lookup,
891 .access = nfs3_proc_access,
892 .readlink = nfs3_proc_readlink,
893 .create = nfs3_proc_create,
894 .remove = nfs3_proc_remove,
895 .unlink_setup = nfs3_proc_unlink_setup,
896 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
897 .unlink_done = nfs3_proc_unlink_done,
898 .rename = nfs3_proc_rename,
899 .rename_setup = nfs3_proc_rename_setup,
900 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
901 .rename_done = nfs3_proc_rename_done,
902 .link = nfs3_proc_link,
903 .symlink = nfs3_proc_symlink,
904 .mkdir = nfs3_proc_mkdir,
905 .rmdir = nfs3_proc_rmdir,
906 .readdir = nfs3_proc_readdir,
907 .mknod = nfs3_proc_mknod,
908 .statfs = nfs3_proc_statfs,
909 .fsinfo = nfs3_proc_fsinfo,
910 .pathconf = nfs3_proc_pathconf,
911 .decode_dirent = nfs3_decode_dirent,
912 .read_setup = nfs3_proc_read_setup,
913 .read_rpc_prepare = nfs3_proc_read_rpc_prepare,
914 .read_done = nfs3_read_done,
915 .write_setup = nfs3_proc_write_setup,
916 .write_rpc_prepare = nfs3_proc_write_rpc_prepare,
917 .write_done = nfs3_write_done,
918 .commit_setup = nfs3_proc_commit_setup,
919 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
920 .commit_done = nfs3_commit_done,
921 .lock = nfs3_proc_lock,
922 .clear_acl_cache = nfs3_forget_cached_acls,
923 .close_context = nfs_close_context,
924 .init_client = nfs_init_client,
925};