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