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nfs41: implement DESTROY_CLIENTID operation
[linux-btrfs-devel.git] / fs / nfs / nfs3proc.c
blob85f1690ca08c110bcd1c1754e564f23619295a1a
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 */
27 static int
28 nfs3_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
43 static int
44 nfs3_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
56 static int
57 do_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 */
83 static int
84 nfs3_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 */
98 static int
99 nfs3_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
116 static int
117 nfs3_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
143 static int
144 nfs3_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
182 static 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);
229 out:
230 dprintk("NFS reply access: %d\n", status);
231 return status;
232 }
233
234 static 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);
259 out:
260 dprintk("NFS reply readlink: %d\n", status);
261 return status;
262 }
263
264 struct 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
278 static 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
295 static 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
306 static void nfs3_free_createdata(struct nfs3_createdata *data)
307 {
308 kfree(data);
309 }
310
311 /*
312 * Create a regular file.
313 */
314 static int
315 nfs3_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);
389 out:
390 nfs3_free_createdata(data);
391 dprintk("NFS reply create: %d\n", status);
392 return status;
393 }
394
395 static int
396 nfs3_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);
419 out:
420 dprintk("NFS reply remove: %d\n", status);
421 return status;
422 }
423
424 static void
425 nfs3_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
426 {
427 msg->rpc_proc = &nfs3_procedures[NFS3PROC_REMOVE];
428 }
429
430 static int
431 nfs3_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
441 static void
442 nfs3_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
443 {
444 msg->rpc_proc = &nfs3_procedures[NFS3PROC_RENAME];
445 }
446
447 static int
448 nfs3_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
462 static int
463 nfs3_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);
490 out:
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
497 static int
498 nfs3_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);
523 out:
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
530 static int
531 nfs3_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);
556 out:
557 dprintk("NFS reply symlink: %d\n", status);
558 return status;
559 }
560
561 static int
562 nfs3_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);
587 out:
588 nfs3_free_createdata(data);
589 dprintk("NFS reply mkdir: %d\n", status);
590 return status;
591 }
592
593 static int
594 nfs3_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);
617 out:
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 */
631 static int
632 nfs3_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);
673 out:
674 dprintk("NFS reply readdir%s: %d\n",
675 plus? "plus" : "", status);
676 return status;
677 }
678
679 static int
680 nfs3_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);
725 out:
726 nfs3_free_createdata(data);
727 dprintk("NFS reply mknod: %d\n", status);
728 return status;
729 }
730
731 static int
732 nfs3_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
749 static int
750 do_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 */
771 static int
772 nfs3_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
783 static int
784 nfs3_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
801 static 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
811 static 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
816 static 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
825 static 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
830 static 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
838 static 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
843 static int
844 nfs3_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
851 const 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 };
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