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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// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/fs/nfs/nfs3proc.c
4 *
5 * Client-side NFSv3 procedures stubs.
6 *
7 * Copyright (C) 1997, Olaf Kirch
8 */
9
10#include <linux/mm.h>
11#include <linux/errno.h>
12#include <linux/string.h>
13#include <linux/sunrpc/clnt.h>
14#include <linux/slab.h>
15#include <linux/nfs.h>
16#include <linux/nfs3.h>
17#include <linux/nfs_fs.h>
18#include <linux/nfs_page.h>
19#include <linux/lockd/bind.h>
20#include <linux/nfs_mount.h>
21#include <linux/freezer.h>
22#include <linux/xattr.h>
23
24#include "iostat.h"
25#include "internal.h"
26#include "nfs3_fs.h"
27
28#define NFSDBG_FACILITY NFSDBG_PROC
29
30/* A wrapper to handle the EJUKEBOX error messages */
31static int
32nfs3_rpc_wrapper(struct rpc_clnt *clnt, struct rpc_message *msg, int flags)
33{
34 int res;
35 do {
36 res = rpc_call_sync(clnt, msg, flags);
37 if (res != -EJUKEBOX)
38 break;
39 freezable_schedule_timeout_killable_unsafe(NFS_JUKEBOX_RETRY_TIME);
40 res = -ERESTARTSYS;
41 } while (!fatal_signal_pending(current));
42 return res;
43}
44
45#define rpc_call_sync(clnt, msg, flags) nfs3_rpc_wrapper(clnt, msg, flags)
46
47static int
48nfs3_async_handle_jukebox(struct rpc_task *task, struct inode *inode)
49{
50 if (task->tk_status != -EJUKEBOX)
51 return 0;
52 if (task->tk_status == -EJUKEBOX)
53 nfs_inc_stats(inode, NFSIOS_DELAY);
54 task->tk_status = 0;
55 rpc_restart_call(task);
56 rpc_delay(task, NFS_JUKEBOX_RETRY_TIME);
57 return 1;
58}
59
60static int
61do_proc_get_root(struct rpc_clnt *client, struct nfs_fh *fhandle,
62 struct nfs_fsinfo *info)
63{
64 struct rpc_message msg = {
65 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
66 .rpc_argp = fhandle,
67 .rpc_resp = info,
68 };
69 int status;
70
71 dprintk("%s: call fsinfo\n", __func__);
72 nfs_fattr_init(info->fattr);
73 status = rpc_call_sync(client, &msg, 0);
74 dprintk("%s: reply fsinfo: %d\n", __func__, status);
75 if (status == 0 && !(info->fattr->valid & NFS_ATTR_FATTR)) {
76 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
77 msg.rpc_resp = info->fattr;
78 status = rpc_call_sync(client, &msg, 0);
79 dprintk("%s: reply getattr: %d\n", __func__, status);
80 }
81 return status;
82}
83
84/*
85 * Bare-bones access to getattr: this is for nfs_get_root/nfs_get_sb
86 */
87static int
88nfs3_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
89 struct nfs_fsinfo *info)
90{
91 int status;
92
93 status = do_proc_get_root(server->client, fhandle, info);
94 if (status && server->nfs_client->cl_rpcclient != server->client)
95 status = do_proc_get_root(server->nfs_client->cl_rpcclient, fhandle, info);
96 return status;
97}
98
99/*
100 * One function for each procedure in the NFS protocol.
101 */
102static int
103nfs3_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
104 struct nfs_fattr *fattr, struct nfs4_label *label)
105{
106 struct rpc_message msg = {
107 .rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR],
108 .rpc_argp = fhandle,
109 .rpc_resp = fattr,
110 };
111 int status;
112
113 dprintk("NFS call getattr\n");
114 nfs_fattr_init(fattr);
115 status = rpc_call_sync(server->client, &msg, 0);
116 dprintk("NFS reply getattr: %d\n", status);
117 return status;
118}
119
120static int
121nfs3_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
122 struct iattr *sattr)
123{
124 struct inode *inode = d_inode(dentry);
125 struct nfs3_sattrargs arg = {
126 .fh = NFS_FH(inode),
127 .sattr = sattr,
128 };
129 struct rpc_message msg = {
130 .rpc_proc = &nfs3_procedures[NFS3PROC_SETATTR],
131 .rpc_argp = &arg,
132 .rpc_resp = fattr,
133 };
134 int status;
135
136 dprintk("NFS call setattr\n");
137 if (sattr->ia_valid & ATTR_FILE)
138 msg.rpc_cred = nfs_file_cred(sattr->ia_file);
139 nfs_fattr_init(fattr);
140 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
141 if (status == 0) {
142 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
143 nfs_zap_acl_cache(inode);
144 nfs_setattr_update_inode(inode, sattr, fattr);
145 }
146 dprintk("NFS reply setattr: %d\n", status);
147 return status;
148}
149
150static int
151nfs3_proc_lookup(struct inode *dir, const struct qstr *name,
152 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
153 struct nfs4_label *label)
154{
155 struct nfs3_diropargs arg = {
156 .fh = NFS_FH(dir),
157 .name = name->name,
158 .len = name->len
159 };
160 struct nfs3_diropres res = {
161 .fh = fhandle,
162 .fattr = fattr
163 };
164 struct rpc_message msg = {
165 .rpc_proc = &nfs3_procedures[NFS3PROC_LOOKUP],
166 .rpc_argp = &arg,
167 .rpc_resp = &res,
168 };
169 int status;
170
171 dprintk("NFS call lookup %s\n", name->name);
172 res.dir_attr = nfs_alloc_fattr();
173 if (res.dir_attr == NULL)
174 return -ENOMEM;
175
176 nfs_fattr_init(fattr);
177 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
178 nfs_refresh_inode(dir, res.dir_attr);
179 if (status >= 0 && !(fattr->valid & NFS_ATTR_FATTR)) {
180 msg.rpc_proc = &nfs3_procedures[NFS3PROC_GETATTR];
181 msg.rpc_argp = fhandle;
182 msg.rpc_resp = fattr;
183 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
184 }
185 nfs_free_fattr(res.dir_attr);
186 dprintk("NFS reply lookup: %d\n", status);
187 return status;
188}
189
190static int nfs3_proc_access(struct inode *inode, struct nfs_access_entry *entry)
191{
192 struct nfs3_accessargs arg = {
193 .fh = NFS_FH(inode),
194 .access = entry->mask,
195 };
196 struct nfs3_accessres res;
197 struct rpc_message msg = {
198 .rpc_proc = &nfs3_procedures[NFS3PROC_ACCESS],
199 .rpc_argp = &arg,
200 .rpc_resp = &res,
201 .rpc_cred = entry->cred,
202 };
203 int status = -ENOMEM;
204
205 dprintk("NFS call access\n");
206 res.fattr = nfs_alloc_fattr();
207 if (res.fattr == NULL)
208 goto out;
209
210 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
211 nfs_refresh_inode(inode, res.fattr);
212 if (status == 0)
213 nfs_access_set_mask(entry, res.access);
214 nfs_free_fattr(res.fattr);
215out:
216 dprintk("NFS reply access: %d\n", status);
217 return status;
218}
219
220static int nfs3_proc_readlink(struct inode *inode, struct page *page,
221 unsigned int pgbase, unsigned int pglen)
222{
223 struct nfs_fattr *fattr;
224 struct nfs3_readlinkargs args = {
225 .fh = NFS_FH(inode),
226 .pgbase = pgbase,
227 .pglen = pglen,
228 .pages = &page
229 };
230 struct rpc_message msg = {
231 .rpc_proc = &nfs3_procedures[NFS3PROC_READLINK],
232 .rpc_argp = &args,
233 };
234 int status = -ENOMEM;
235
236 dprintk("NFS call readlink\n");
237 fattr = nfs_alloc_fattr();
238 if (fattr == NULL)
239 goto out;
240 msg.rpc_resp = fattr;
241
242 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
243 nfs_refresh_inode(inode, fattr);
244 nfs_free_fattr(fattr);
245out:
246 dprintk("NFS reply readlink: %d\n", status);
247 return status;
248}
249
250struct nfs3_createdata {
251 struct rpc_message msg;
252 union {
253 struct nfs3_createargs create;
254 struct nfs3_mkdirargs mkdir;
255 struct nfs3_symlinkargs symlink;
256 struct nfs3_mknodargs mknod;
257 } arg;
258 struct nfs3_diropres res;
259 struct nfs_fh fh;
260 struct nfs_fattr fattr;
261 struct nfs_fattr dir_attr;
262};
263
264static struct nfs3_createdata *nfs3_alloc_createdata(void)
265{
266 struct nfs3_createdata *data;
267
268 data = kzalloc(sizeof(*data), GFP_KERNEL);
269 if (data != NULL) {
270 data->msg.rpc_argp = &data->arg;
271 data->msg.rpc_resp = &data->res;
272 data->res.fh = &data->fh;
273 data->res.fattr = &data->fattr;
274 data->res.dir_attr = &data->dir_attr;
275 nfs_fattr_init(data->res.fattr);
276 nfs_fattr_init(data->res.dir_attr);
277 }
278 return data;
279}
280
281static int nfs3_do_create(struct inode *dir, struct dentry *dentry, struct nfs3_createdata *data)
282{
283 int status;
284
285 status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
286 nfs_post_op_update_inode(dir, data->res.dir_attr);
287 if (status == 0)
288 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, NULL);
289 return status;
290}
291
292static void nfs3_free_createdata(struct nfs3_createdata *data)
293{
294 kfree(data);
295}
296
297/*
298 * Create a regular file.
299 */
300static int
301nfs3_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
302 int flags)
303{
304 struct posix_acl *default_acl, *acl;
305 struct nfs3_createdata *data;
306 int status = -ENOMEM;
307
308 dprintk("NFS call create %pd\n", dentry);
309
310 data = nfs3_alloc_createdata();
311 if (data == NULL)
312 goto out;
313
314 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_CREATE];
315 data->arg.create.fh = NFS_FH(dir);
316 data->arg.create.name = dentry->d_name.name;
317 data->arg.create.len = dentry->d_name.len;
318 data->arg.create.sattr = sattr;
319
320 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
321 if (flags & O_EXCL) {
322 data->arg.create.createmode = NFS3_CREATE_EXCLUSIVE;
323 data->arg.create.verifier[0] = cpu_to_be32(jiffies);
324 data->arg.create.verifier[1] = cpu_to_be32(current->pid);
325 }
326
327 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
328 if (status)
329 goto out;
330
331 for (;;) {
332 status = nfs3_do_create(dir, dentry, data);
333
334 if (status != -ENOTSUPP)
335 break;
336 /* If the server doesn't support the exclusive creation
337 * semantics, try again with simple 'guarded' mode. */
338 switch (data->arg.create.createmode) {
339 case NFS3_CREATE_EXCLUSIVE:
340 data->arg.create.createmode = NFS3_CREATE_GUARDED;
341 break;
342
343 case NFS3_CREATE_GUARDED:
344 data->arg.create.createmode = NFS3_CREATE_UNCHECKED;
345 break;
346
347 case NFS3_CREATE_UNCHECKED:
348 goto out;
349 }
350 nfs_fattr_init(data->res.dir_attr);
351 nfs_fattr_init(data->res.fattr);
352 }
353
354 if (status != 0)
355 goto out_release_acls;
356
357 /* When we created the file with exclusive semantics, make
358 * sure we set the attributes afterwards. */
359 if (data->arg.create.createmode == NFS3_CREATE_EXCLUSIVE) {
360 dprintk("NFS call setattr (post-create)\n");
361
362 if (!(sattr->ia_valid & ATTR_ATIME_SET))
363 sattr->ia_valid |= ATTR_ATIME;
364 if (!(sattr->ia_valid & ATTR_MTIME_SET))
365 sattr->ia_valid |= ATTR_MTIME;
366
367 /* Note: we could use a guarded setattr here, but I'm
368 * not sure this buys us anything (and I'd have
369 * to revamp the NFSv3 XDR code) */
370 status = nfs3_proc_setattr(dentry, data->res.fattr, sattr);
371 nfs_post_op_update_inode(d_inode(dentry), data->res.fattr);
372 dprintk("NFS reply setattr (post-create): %d\n", status);
373 if (status != 0)
374 goto out_release_acls;
375 }
376
377 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
378
379out_release_acls:
380 posix_acl_release(acl);
381 posix_acl_release(default_acl);
382out:
383 nfs3_free_createdata(data);
384 dprintk("NFS reply create: %d\n", status);
385 return status;
386}
387
388static int
389nfs3_proc_remove(struct inode *dir, struct dentry *dentry)
390{
391 struct nfs_removeargs arg = {
392 .fh = NFS_FH(dir),
393 .name = dentry->d_name,
394 };
395 struct nfs_removeres res;
396 struct rpc_message msg = {
397 .rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE],
398 .rpc_argp = &arg,
399 .rpc_resp = &res,
400 };
401 int status = -ENOMEM;
402
403 dprintk("NFS call remove %pd2\n", dentry);
404 res.dir_attr = nfs_alloc_fattr();
405 if (res.dir_attr == NULL)
406 goto out;
407
408 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
409 nfs_post_op_update_inode(dir, res.dir_attr);
410 nfs_free_fattr(res.dir_attr);
411out:
412 dprintk("NFS reply remove: %d\n", status);
413 return status;
414}
415
416static void
417nfs3_proc_unlink_setup(struct rpc_message *msg, struct dentry *dentry)
418{
419 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
420}
421
422static void nfs3_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
423{
424 rpc_call_start(task);
425}
426
427static int
428nfs3_proc_unlink_done(struct rpc_task *task, struct inode *dir)
429{
430 struct nfs_removeres *res;
431 if (nfs3_async_handle_jukebox(task, dir))
432 return 0;
433 res = task->tk_msg.rpc_resp;
434 nfs_post_op_update_inode(dir, res->dir_attr);
435 return 1;
436}
437
438static void
439nfs3_proc_rename_setup(struct rpc_message *msg,
440 struct dentry *old_dentry,
441 struct dentry *new_dentry)
442{
443 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
444}
445
446static void nfs3_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
447{
448 rpc_call_start(task);
449}
450
451static int
452nfs3_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
453 struct inode *new_dir)
454{
455 struct nfs_renameres *res;
456
457 if (nfs3_async_handle_jukebox(task, old_dir))
458 return 0;
459 res = task->tk_msg.rpc_resp;
460
461 nfs_post_op_update_inode(old_dir, res->old_fattr);
462 nfs_post_op_update_inode(new_dir, res->new_fattr);
463 return 1;
464}
465
466static int
467nfs3_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
468{
469 struct nfs3_linkargs arg = {
470 .fromfh = NFS_FH(inode),
471 .tofh = NFS_FH(dir),
472 .toname = name->name,
473 .tolen = name->len
474 };
475 struct nfs3_linkres res;
476 struct rpc_message msg = {
477 .rpc_proc = &nfs3_procedures[NFS3PROC_LINK],
478 .rpc_argp = &arg,
479 .rpc_resp = &res,
480 };
481 int status = -ENOMEM;
482
483 dprintk("NFS call link %s\n", name->name);
484 res.fattr = nfs_alloc_fattr();
485 res.dir_attr = nfs_alloc_fattr();
486 if (res.fattr == NULL || res.dir_attr == NULL)
487 goto out;
488
489 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
490 nfs_post_op_update_inode(dir, res.dir_attr);
491 nfs_post_op_update_inode(inode, res.fattr);
492out:
493 nfs_free_fattr(res.dir_attr);
494 nfs_free_fattr(res.fattr);
495 dprintk("NFS reply link: %d\n", status);
496 return status;
497}
498
499static int
500nfs3_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page,
501 unsigned int len, struct iattr *sattr)
502{
503 struct nfs3_createdata *data;
504 int status = -ENOMEM;
505
506 if (len > NFS3_MAXPATHLEN)
507 return -ENAMETOOLONG;
508
509 dprintk("NFS call symlink %pd\n", dentry);
510
511 data = nfs3_alloc_createdata();
512 if (data == NULL)
513 goto out;
514 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_SYMLINK];
515 data->arg.symlink.fromfh = NFS_FH(dir);
516 data->arg.symlink.fromname = dentry->d_name.name;
517 data->arg.symlink.fromlen = dentry->d_name.len;
518 data->arg.symlink.pages = &page;
519 data->arg.symlink.pathlen = len;
520 data->arg.symlink.sattr = sattr;
521
522 status = nfs3_do_create(dir, dentry, data);
523
524 nfs3_free_createdata(data);
525out:
526 dprintk("NFS reply symlink: %d\n", status);
527 return status;
528}
529
530static int
531nfs3_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr)
532{
533 struct posix_acl *default_acl, *acl;
534 struct nfs3_createdata *data;
535 int status = -ENOMEM;
536
537 dprintk("NFS call mkdir %pd\n", dentry);
538
539 data = nfs3_alloc_createdata();
540 if (data == NULL)
541 goto out;
542
543 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
544 if (status)
545 goto out;
546
547 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKDIR];
548 data->arg.mkdir.fh = NFS_FH(dir);
549 data->arg.mkdir.name = dentry->d_name.name;
550 data->arg.mkdir.len = dentry->d_name.len;
551 data->arg.mkdir.sattr = sattr;
552
553 status = nfs3_do_create(dir, dentry, data);
554 if (status != 0)
555 goto out_release_acls;
556
557 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
558
559out_release_acls:
560 posix_acl_release(acl);
561 posix_acl_release(default_acl);
562out:
563 nfs3_free_createdata(data);
564 dprintk("NFS reply mkdir: %d\n", status);
565 return status;
566}
567
568static int
569nfs3_proc_rmdir(struct inode *dir, const struct qstr *name)
570{
571 struct nfs_fattr *dir_attr;
572 struct nfs3_diropargs arg = {
573 .fh = NFS_FH(dir),
574 .name = name->name,
575 .len = name->len
576 };
577 struct rpc_message msg = {
578 .rpc_proc = &nfs3_procedures[NFS3PROC_RMDIR],
579 .rpc_argp = &arg,
580 };
581 int status = -ENOMEM;
582
583 dprintk("NFS call rmdir %s\n", name->name);
584 dir_attr = nfs_alloc_fattr();
585 if (dir_attr == NULL)
586 goto out;
587
588 msg.rpc_resp = dir_attr;
589 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
590 nfs_post_op_update_inode(dir, dir_attr);
591 nfs_free_fattr(dir_attr);
592out:
593 dprintk("NFS reply rmdir: %d\n", status);
594 return status;
595}
596
597/*
598 * The READDIR implementation is somewhat hackish - we pass the user buffer
599 * to the encode function, which installs it in the receive iovec.
600 * The decode function itself doesn't perform any decoding, it just makes
601 * sure the reply is syntactically correct.
602 *
603 * Also note that this implementation handles both plain readdir and
604 * readdirplus.
605 */
606static int
607nfs3_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
608 u64 cookie, struct page **pages, unsigned int count, bool plus)
609{
610 struct inode *dir = d_inode(dentry);
611 __be32 *verf = NFS_I(dir)->cookieverf;
612 struct nfs3_readdirargs arg = {
613 .fh = NFS_FH(dir),
614 .cookie = cookie,
615 .verf = {verf[0], verf[1]},
616 .plus = plus,
617 .count = count,
618 .pages = pages
619 };
620 struct nfs3_readdirres res = {
621 .verf = verf,
622 .plus = plus
623 };
624 struct rpc_message msg = {
625 .rpc_proc = &nfs3_procedures[NFS3PROC_READDIR],
626 .rpc_argp = &arg,
627 .rpc_resp = &res,
628 .rpc_cred = cred
629 };
630 int status = -ENOMEM;
631
632 if (plus)
633 msg.rpc_proc = &nfs3_procedures[NFS3PROC_READDIRPLUS];
634
635 dprintk("NFS call readdir%s %d\n",
636 plus? "plus" : "", (unsigned int) cookie);
637
638 res.dir_attr = nfs_alloc_fattr();
639 if (res.dir_attr == NULL)
640 goto out;
641
642 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
643
644 nfs_invalidate_atime(dir);
645 nfs_refresh_inode(dir, res.dir_attr);
646
647 nfs_free_fattr(res.dir_attr);
648out:
649 dprintk("NFS reply readdir%s: %d\n",
650 plus? "plus" : "", status);
651 return status;
652}
653
654static int
655nfs3_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
656 dev_t rdev)
657{
658 struct posix_acl *default_acl, *acl;
659 struct nfs3_createdata *data;
660 int status = -ENOMEM;
661
662 dprintk("NFS call mknod %pd %u:%u\n", dentry,
663 MAJOR(rdev), MINOR(rdev));
664
665 data = nfs3_alloc_createdata();
666 if (data == NULL)
667 goto out;
668
669 status = posix_acl_create(dir, &sattr->ia_mode, &default_acl, &acl);
670 if (status)
671 goto out;
672
673 data->msg.rpc_proc = &nfs3_procedures[NFS3PROC_MKNOD];
674 data->arg.mknod.fh = NFS_FH(dir);
675 data->arg.mknod.name = dentry->d_name.name;
676 data->arg.mknod.len = dentry->d_name.len;
677 data->arg.mknod.sattr = sattr;
678 data->arg.mknod.rdev = rdev;
679
680 switch (sattr->ia_mode & S_IFMT) {
681 case S_IFBLK:
682 data->arg.mknod.type = NF3BLK;
683 break;
684 case S_IFCHR:
685 data->arg.mknod.type = NF3CHR;
686 break;
687 case S_IFIFO:
688 data->arg.mknod.type = NF3FIFO;
689 break;
690 case S_IFSOCK:
691 data->arg.mknod.type = NF3SOCK;
692 break;
693 default:
694 status = -EINVAL;
695 goto out;
696 }
697
698 status = nfs3_do_create(dir, dentry, data);
699 if (status != 0)
700 goto out_release_acls;
701
702 status = nfs3_proc_setacls(d_inode(dentry), acl, default_acl);
703
704out_release_acls:
705 posix_acl_release(acl);
706 posix_acl_release(default_acl);
707out:
708 nfs3_free_createdata(data);
709 dprintk("NFS reply mknod: %d\n", status);
710 return status;
711}
712
713static int
714nfs3_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
715 struct nfs_fsstat *stat)
716{
717 struct rpc_message msg = {
718 .rpc_proc = &nfs3_procedures[NFS3PROC_FSSTAT],
719 .rpc_argp = fhandle,
720 .rpc_resp = stat,
721 };
722 int status;
723
724 dprintk("NFS call fsstat\n");
725 nfs_fattr_init(stat->fattr);
726 status = rpc_call_sync(server->client, &msg, 0);
727 dprintk("NFS reply fsstat: %d\n", status);
728 return status;
729}
730
731static int
732do_proc_fsinfo(struct rpc_clnt *client, struct nfs_fh *fhandle,
733 struct nfs_fsinfo *info)
734{
735 struct rpc_message msg = {
736 .rpc_proc = &nfs3_procedures[NFS3PROC_FSINFO],
737 .rpc_argp = fhandle,
738 .rpc_resp = info,
739 };
740 int status;
741
742 dprintk("NFS call fsinfo\n");
743 nfs_fattr_init(info->fattr);
744 status = rpc_call_sync(client, &msg, 0);
745 dprintk("NFS reply fsinfo: %d\n", status);
746 return status;
747}
748
749/*
750 * Bare-bones access to fsinfo: this is for nfs_get_root/nfs_get_sb via
751 * nfs_create_server
752 */
753static int
754nfs3_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
755 struct nfs_fsinfo *info)
756{
757 int status;
758
759 status = do_proc_fsinfo(server->client, fhandle, info);
760 if (status && server->nfs_client->cl_rpcclient != server->client)
761 status = do_proc_fsinfo(server->nfs_client->cl_rpcclient, fhandle, info);
762 return status;
763}
764
765static int
766nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
767 struct nfs_pathconf *info)
768{
769 struct rpc_message msg = {
770 .rpc_proc = &nfs3_procedures[NFS3PROC_PATHCONF],
771 .rpc_argp = fhandle,
772 .rpc_resp = info,
773 };
774 int status;
775
776 dprintk("NFS call pathconf\n");
777 nfs_fattr_init(info->fattr);
778 status = rpc_call_sync(server->client, &msg, 0);
779 dprintk("NFS reply pathconf: %d\n", status);
780 return status;
781}
782
783static int nfs3_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
784{
785 struct inode *inode = hdr->inode;
786
787 if (hdr->pgio_done_cb != NULL)
788 return hdr->pgio_done_cb(task, hdr);
789
790 if (nfs3_async_handle_jukebox(task, inode))
791 return -EAGAIN;
792
793 nfs_invalidate_atime(inode);
794 nfs_refresh_inode(inode, &hdr->fattr);
795 return 0;
796}
797
798static void nfs3_proc_read_setup(struct nfs_pgio_header *hdr,
799 struct rpc_message *msg)
800{
801 msg->rpc_proc = &nfs3_procedures[NFS3PROC_READ];
802}
803
804static int nfs3_proc_pgio_rpc_prepare(struct rpc_task *task,
805 struct nfs_pgio_header *hdr)
806{
807 rpc_call_start(task);
808 return 0;
809}
810
811static int nfs3_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
812{
813 struct inode *inode = hdr->inode;
814
815 if (hdr->pgio_done_cb != NULL)
816 return hdr->pgio_done_cb(task, hdr);
817
818 if (nfs3_async_handle_jukebox(task, inode))
819 return -EAGAIN;
820 if (task->tk_status >= 0)
821 nfs_writeback_update_inode(hdr);
822 return 0;
823}
824
825static void nfs3_proc_write_setup(struct nfs_pgio_header *hdr,
826 struct rpc_message *msg)
827{
828 msg->rpc_proc = &nfs3_procedures[NFS3PROC_WRITE];
829}
830
831static void nfs3_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
832{
833 rpc_call_start(task);
834}
835
836static int nfs3_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
837{
838 if (data->commit_done_cb != NULL)
839 return data->commit_done_cb(task, data);
840
841 if (nfs3_async_handle_jukebox(task, data->inode))
842 return -EAGAIN;
843 nfs_refresh_inode(data->inode, data->res.fattr);
844 return 0;
845}
846
847static void nfs3_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
848{
849 msg->rpc_proc = &nfs3_procedures[NFS3PROC_COMMIT];
850}
851
852static void nfs3_nlm_alloc_call(void *data)
853{
854 struct nfs_lock_context *l_ctx = data;
855 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
856 get_nfs_open_context(l_ctx->open_context);
857 nfs_get_lock_context(l_ctx->open_context);
858 }
859}
860
861static bool nfs3_nlm_unlock_prepare(struct rpc_task *task, void *data)
862{
863 struct nfs_lock_context *l_ctx = data;
864 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags))
865 return nfs_async_iocounter_wait(task, l_ctx);
866 return false;
867
868}
869
870static void nfs3_nlm_release_call(void *data)
871{
872 struct nfs_lock_context *l_ctx = data;
873 struct nfs_open_context *ctx;
874 if (l_ctx && test_bit(NFS_CONTEXT_UNLOCK, &l_ctx->open_context->flags)) {
875 ctx = l_ctx->open_context;
876 nfs_put_lock_context(l_ctx);
877 put_nfs_open_context(ctx);
878 }
879}
880
881static const struct nlmclnt_operations nlmclnt_fl_close_lock_ops = {
882 .nlmclnt_alloc_call = nfs3_nlm_alloc_call,
883 .nlmclnt_unlock_prepare = nfs3_nlm_unlock_prepare,
884 .nlmclnt_release_call = nfs3_nlm_release_call,
885};
886
887static int
888nfs3_proc_lock(struct file *filp, int cmd, struct file_lock *fl)
889{
890 struct inode *inode = file_inode(filp);
891 struct nfs_lock_context *l_ctx = NULL;
892 struct nfs_open_context *ctx = nfs_file_open_context(filp);
893 int status;
894
895 if (fl->fl_flags & FL_CLOSE) {
896 l_ctx = nfs_get_lock_context(ctx);
897 if (IS_ERR(l_ctx))
898 l_ctx = NULL;
899 else
900 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
901 }
902
903 status = nlmclnt_proc(NFS_SERVER(inode)->nlm_host, cmd, fl, l_ctx);
904
905 if (l_ctx)
906 nfs_put_lock_context(l_ctx);
907
908 return status;
909}
910
911static int nfs3_have_delegation(struct inode *inode, fmode_t flags)
912{
913 return 0;
914}
915
916static const struct inode_operations nfs3_dir_inode_operations = {
917 .create = nfs_create,
918 .lookup = nfs_lookup,
919 .link = nfs_link,
920 .unlink = nfs_unlink,
921 .symlink = nfs_symlink,
922 .mkdir = nfs_mkdir,
923 .rmdir = nfs_rmdir,
924 .mknod = nfs_mknod,
925 .rename = nfs_rename,
926 .permission = nfs_permission,
927 .getattr = nfs_getattr,
928 .setattr = nfs_setattr,
929#ifdef CONFIG_NFS_V3_ACL
930 .listxattr = nfs3_listxattr,
931 .get_acl = nfs3_get_acl,
932 .set_acl = nfs3_set_acl,
933#endif
934};
935
936static const struct inode_operations nfs3_file_inode_operations = {
937 .permission = nfs_permission,
938 .getattr = nfs_getattr,
939 .setattr = nfs_setattr,
940#ifdef CONFIG_NFS_V3_ACL
941 .listxattr = nfs3_listxattr,
942 .get_acl = nfs3_get_acl,
943 .set_acl = nfs3_set_acl,
944#endif
945};
946
947const struct nfs_rpc_ops nfs_v3_clientops = {
948 .version = 3, /* protocol version */
949 .dentry_ops = &nfs_dentry_operations,
950 .dir_inode_ops = &nfs3_dir_inode_operations,
951 .file_inode_ops = &nfs3_file_inode_operations,
952 .file_ops = &nfs_file_operations,
953 .nlmclnt_ops = &nlmclnt_fl_close_lock_ops,
954 .getroot = nfs3_proc_get_root,
955 .submount = nfs_submount,
956 .try_mount = nfs_try_mount,
957 .getattr = nfs3_proc_getattr,
958 .setattr = nfs3_proc_setattr,
959 .lookup = nfs3_proc_lookup,
960 .access = nfs3_proc_access,
961 .readlink = nfs3_proc_readlink,
962 .create = nfs3_proc_create,
963 .remove = nfs3_proc_remove,
964 .unlink_setup = nfs3_proc_unlink_setup,
965 .unlink_rpc_prepare = nfs3_proc_unlink_rpc_prepare,
966 .unlink_done = nfs3_proc_unlink_done,
967 .rename_setup = nfs3_proc_rename_setup,
968 .rename_rpc_prepare = nfs3_proc_rename_rpc_prepare,
969 .rename_done = nfs3_proc_rename_done,
970 .link = nfs3_proc_link,
971 .symlink = nfs3_proc_symlink,
972 .mkdir = nfs3_proc_mkdir,
973 .rmdir = nfs3_proc_rmdir,
974 .readdir = nfs3_proc_readdir,
975 .mknod = nfs3_proc_mknod,
976 .statfs = nfs3_proc_statfs,
977 .fsinfo = nfs3_proc_fsinfo,
978 .pathconf = nfs3_proc_pathconf,
979 .decode_dirent = nfs3_decode_dirent,
980 .pgio_rpc_prepare = nfs3_proc_pgio_rpc_prepare,
981 .read_setup = nfs3_proc_read_setup,
982 .read_done = nfs3_read_done,
983 .write_setup = nfs3_proc_write_setup,
984 .write_done = nfs3_write_done,
985 .commit_setup = nfs3_proc_commit_setup,
986 .commit_rpc_prepare = nfs3_proc_commit_rpc_prepare,
987 .commit_done = nfs3_commit_done,
988 .lock = nfs3_proc_lock,
989 .clear_acl_cache = forget_all_cached_acls,
990 .close_context = nfs_close_context,
991 .have_delegation = nfs3_have_delegation,
992 .alloc_client = nfs_alloc_client,
993 .init_client = nfs_init_client,
994 .free_client = nfs_free_client,
995 .create_server = nfs3_create_server,
996 .clone_server = nfs3_clone_server,
997};