1 /*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 #include <linux/mm.h>
39 #include <linux/utsname.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/smp_lock.h>
48 #include <linux/namei.h>
49
50 #include "delegation.h"
51
52 #define NFSDBG_FACILITY NFSDBG_PROC
53
54 #define NFS4_POLL_RETRY_MIN (1*HZ)
55 #define NFS4_POLL_RETRY_MAX (15*HZ)
56
57 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
58 static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *);
59 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
60 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
61 extern struct rpc_procinfo nfs4_procedures[];
62
63 extern nfs4_stateid zero_stateid;
64
65 /* Prevent leaks of NFSv4 errors into userland */
66 static inline int nfs4_map_errors(int err)
67 {
68 if (err < -1000) {
69 printk(KERN_WARNING "%s could not handle NFSv4 error %d\n",
70 __FUNCTION__, -err);
71 return -EIO;
72 }
73 return err;
74 }
75
76 /*
77 * This is our standard bitmap for GETATTR requests.
78 */
79 const u32 nfs4_fattr_bitmap[2] = {
80 FATTR4_WORD0_TYPE
81 | FATTR4_WORD0_CHANGE
82 | FATTR4_WORD0_SIZE
83 | FATTR4_WORD0_FSID
84 | FATTR4_WORD0_FILEID,
85 FATTR4_WORD1_MODE
86 | FATTR4_WORD1_NUMLINKS
87 | FATTR4_WORD1_OWNER
88 | FATTR4_WORD1_OWNER_GROUP
89 | FATTR4_WORD1_RAWDEV
90 | FATTR4_WORD1_SPACE_USED
91 | FATTR4_WORD1_TIME_ACCESS
92 | FATTR4_WORD1_TIME_METADATA
93 | FATTR4_WORD1_TIME_MODIFY
94 };
95
96 const u32 nfs4_statfs_bitmap[2] = {
97 FATTR4_WORD0_FILES_AVAIL
98 | FATTR4_WORD0_FILES_FREE
99 | FATTR4_WORD0_FILES_TOTAL,
100 FATTR4_WORD1_SPACE_AVAIL
101 | FATTR4_WORD1_SPACE_FREE
102 | FATTR4_WORD1_SPACE_TOTAL
103 };
104
105 u32 nfs4_pathconf_bitmap[2] = {
106 FATTR4_WORD0_MAXLINK
107 | FATTR4_WORD0_MAXNAME,
108 0
109 };
110
111 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
112 | FATTR4_WORD0_MAXREAD
113 | FATTR4_WORD0_MAXWRITE
114 | FATTR4_WORD0_LEASE_TIME,
115 0
116 };
117
118 static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
119 struct nfs4_readdir_arg *readdir)
120 {
121 u32 *start, *p;
122
123 BUG_ON(readdir->count < 80);
124 if (cookie > 2) {
125 readdir->cookie = (cookie > 2) ? cookie : 0;
126 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
127 return;
128 }
129
130 readdir->cookie = 0;
131 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
132 if (cookie == 2)
133 return;
134
135 /*
136 * NFSv4 servers do not return entries for '.' and '..'
137 * Therefore, we fake these entries here. We let '.'
138 * have cookie 0 and '..' have cookie 1. Note that
139 * when talking to the server, we always send cookie 0
140 * instead of 1 or 2.
141 */
142 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
143
144 if (cookie == 0) {
145 *p++ = xdr_one; /* next */
146 *p++ = xdr_zero; /* cookie, first word */
147 *p++ = xdr_one; /* cookie, second word */
148 *p++ = xdr_one; /* entry len */
149 memcpy(p, ".\0\0\0", 4); /* entry */
150 p++;
151 *p++ = xdr_one; /* bitmap length */
152 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
153 *p++ = htonl(8); /* attribute buffer length */
154 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
155 }
156
157 *p++ = xdr_one; /* next */
158 *p++ = xdr_zero; /* cookie, first word */
159 *p++ = xdr_two; /* cookie, second word */
160 *p++ = xdr_two; /* entry len */
161 memcpy(p, "..\0\0", 4); /* entry */
162 p++;
163 *p++ = xdr_one; /* bitmap length */
164 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
165 *p++ = htonl(8); /* attribute buffer length */
166 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
167
168 readdir->pgbase = (char *)p - (char *)start;
169 readdir->count -= readdir->pgbase;
170 kunmap_atomic(start, KM_USER0);
171 }
172
173 static void
174 renew_lease(struct nfs_server *server, unsigned long timestamp)
175 {
176 struct nfs4_client *clp = server->nfs4_state;
177 spin_lock(&clp->cl_lock);
178 if (time_before(clp->cl_last_renewal,timestamp))
179 clp->cl_last_renewal = timestamp;
180 spin_unlock(&clp->cl_lock);
181 }
182
183 static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
184 {
185 struct nfs_inode *nfsi = NFS_I(inode);
186
187 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
188 nfsi->change_attr = cinfo->after;
189 }
190
191 /*
192 * OPEN_RECLAIM:
193 * reclaim state on the server after a reboot.
194 * Assumes caller is holding the sp->so_sem
195 */
196 static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
197 {
198 struct inode *inode = state->inode;
199 struct nfs_server *server = NFS_SERVER(inode);
200 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
201 struct nfs_openargs o_arg = {
202 .fh = NFS_FH(inode),
203 .seqid = sp->so_seqid,
204 .id = sp->so_id,
205 .open_flags = state->state,
206 .clientid = server->nfs4_state->cl_clientid,
207 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
208 .bitmask = server->attr_bitmask,
209 };
210 struct nfs_openres o_res = {
211 .server = server, /* Grrr */
212 };
213 struct rpc_message msg = {
214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
215 .rpc_argp = &o_arg,
216 .rpc_resp = &o_res,
217 .rpc_cred = sp->so_cred,
218 };
219 int status;
220
221 if (delegation != NULL) {
222 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
223 memcpy(&state->stateid, &delegation->stateid,
224 sizeof(state->stateid));
225 set_bit(NFS_DELEGATED_STATE, &state->flags);
226 return 0;
227 }
228 o_arg.u.delegation_type = delegation->type;
229 }
230 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
231 nfs4_increment_seqid(status, sp);
232 if (status == 0) {
233 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
234 if (o_res.delegation_type != 0) {
235 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
236 /* Did the server issue an immediate delegation recall? */
237 if (o_res.do_recall)
238 nfs_async_inode_return_delegation(inode, &o_res.stateid);
239 }
240 }
241 clear_bit(NFS_DELEGATED_STATE, &state->flags);
242 /* Ensure we update the inode attributes */
243 NFS_CACHEINV(inode);
244 return status;
245 }
246
247 int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
248 {
249 struct nfs_server *server = NFS_SERVER(state->inode);
250 struct nfs4_exception exception = { };
251 int err;
252 do {
253 err = _nfs4_open_reclaim(sp, state);
254 switch (err) {
255 case 0:
256 case -NFS4ERR_STALE_CLIENTID:
257 case -NFS4ERR_STALE_STATEID:
258 case -NFS4ERR_EXPIRED:
259 return err;
260 }
261 err = nfs4_handle_exception(server, err, &exception);
262 } while (exception.retry);
263 return err;
264 }
265
266 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
267 {
268 struct nfs4_state_owner *sp = state->owner;
269 struct inode *inode = dentry->d_inode;
270 struct nfs_server *server = NFS_SERVER(inode);
271 struct dentry *parent = dget_parent(dentry);
272 struct nfs_openargs arg = {
273 .fh = NFS_FH(parent->d_inode),
274 .clientid = server->nfs4_state->cl_clientid,
275 .name = &dentry->d_name,
276 .id = sp->so_id,
277 .server = server,
278 .bitmask = server->attr_bitmask,
279 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
280 };
281 struct nfs_openres res = {
282 .server = server,
283 };
284 struct rpc_message msg = {
285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
286 .rpc_argp = &arg,
287 .rpc_resp = &res,
288 .rpc_cred = sp->so_cred,
289 };
290 int status = 0;
291
292 down(&sp->so_sema);
293 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
294 goto out;
295 if (state->state == 0)
296 goto out;
297 arg.seqid = sp->so_seqid;
298 arg.open_flags = state->state;
299 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
300 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
301 nfs4_increment_seqid(status, sp);
302 if (status >= 0) {
303 memcpy(state->stateid.data, res.stateid.data,
304 sizeof(state->stateid.data));
305 clear_bit(NFS_DELEGATED_STATE, &state->flags);
306 }
307 out:
308 up(&sp->so_sema);
309 dput(parent);
310 return status;
311 }
312
313 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
314 {
315 struct nfs4_exception exception = { };
316 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
317 int err;
318 do {
319 err = _nfs4_open_delegation_recall(dentry, state);
320 switch (err) {
321 case 0:
322 return err;
323 case -NFS4ERR_STALE_CLIENTID:
324 case -NFS4ERR_STALE_STATEID:
325 case -NFS4ERR_EXPIRED:
326 /* Don't recall a delegation if it was lost */
327 nfs4_schedule_state_recovery(server->nfs4_state);
328 return err;
329 }
330 err = nfs4_handle_exception(server, err, &exception);
331 } while (exception.retry);
332 return err;
333 }
334
335 static int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid)
336 {
337 struct nfs_open_confirmargs arg = {
338 .fh = fh,
339 .seqid = sp->so_seqid,
340 .stateid = *stateid,
341 };
342 struct nfs_open_confirmres res;
343 struct rpc_message msg = {
344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
345 .rpc_argp = &arg,
346 .rpc_resp = &res,
347 .rpc_cred = sp->so_cred,
348 };
349 int status;
350
351 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
352 nfs4_increment_seqid(status, sp);
353 if (status >= 0)
354 memcpy(stateid, &res.stateid, sizeof(*stateid));
355 return status;
356 }
357
358 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
359 {
360 struct nfs_access_entry cache;
361 int status;
362
363 status = nfs_access_get_cached(inode, cred, &cache);
364 if (status == 0)
365 goto out;
366
367 /* Be clever: ask server to check for all possible rights */
368 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
369 cache.cred = cred;
370 cache.jiffies = jiffies;
371 status = _nfs4_proc_access(inode, &cache);
372 if (status != 0)
373 return status;
374 nfs_access_add_cache(inode, &cache);
375 out:
376 if ((cache.mask & mask) == mask)
377 return 0;
378 return -EACCES;
379 }
380
381 /*
382 * Returns an nfs4_state + an extra reference to the inode
383 */
384 int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
385 {
386 struct nfs_delegation *delegation;
387 struct nfs_server *server = NFS_SERVER(inode);
388 struct nfs4_client *clp = server->nfs4_state;
389 struct nfs_inode *nfsi = NFS_I(inode);
390 struct nfs4_state_owner *sp = NULL;
391 struct nfs4_state *state = NULL;
392 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
393 int mask = 0;
394 int err;
395
396 /* Protect against reboot recovery - NOTE ORDER! */
397 down_read(&clp->cl_sem);
398 /* Protect against delegation recall */
399 down_read(&nfsi->rwsem);
400 delegation = NFS_I(inode)->delegation;
401 err = -ENOENT;
402 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
403 goto out_err;
404 err = -ENOMEM;
405 if (!(sp = nfs4_get_state_owner(server, cred))) {
406 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
407 goto out_err;
408 }
409 down(&sp->so_sema);
410 state = nfs4_get_open_state(inode, sp);
411 if (state == NULL)
412 goto out_err;
413
414 err = -ENOENT;
415 if ((state->state & open_flags) == open_flags) {
416 spin_lock(&inode->i_lock);
417 if (open_flags & FMODE_READ)
418 state->nreaders++;
419 if (open_flags & FMODE_WRITE)
420 state->nwriters++;
421 spin_unlock(&inode->i_lock);
422 goto out_ok;
423 } else if (state->state != 0)
424 goto out_err;
425
426 lock_kernel();
427 err = _nfs4_do_access(inode, cred, mask);
428 unlock_kernel();
429 if (err != 0)
430 goto out_err;
431 spin_lock(&inode->i_lock);
432 memcpy(state->stateid.data, delegation->stateid.data,
433 sizeof(state->stateid.data));
434 state->state |= open_flags;
435 if (open_flags & FMODE_READ)
436 state->nreaders++;
437 if (open_flags & FMODE_WRITE)
438 state->nwriters++;
439 set_bit(NFS_DELEGATED_STATE, &state->flags);
440 spin_unlock(&inode->i_lock);
441 out_ok:
442 up(&sp->so_sema);
443 nfs4_put_state_owner(sp);
444 up_read(&nfsi->rwsem);
445 up_read(&clp->cl_sem);
446 igrab(inode);
447 *res = state;
448 return 0;
449 out_err:
450 if (sp != NULL) {
451 if (state != NULL)
452 nfs4_put_open_state(state);
453 up(&sp->so_sema);
454 nfs4_put_state_owner(sp);
455 }
456 up_read(&nfsi->rwsem);
457 up_read(&clp->cl_sem);
458 return err;
459 }
460
461 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
462 {
463 struct nfs4_exception exception = { };
464 struct nfs4_state *res;
465 int err;
466
467 do {
468 err = _nfs4_open_delegated(inode, flags, cred, &res);
469 if (err == 0)
470 break;
471 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
472 err, &exception));
473 } while (exception.retry);
474 return res;
475 }
476
477 /*
478 * Returns an nfs4_state + an referenced inode
479 */
480 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
481 {
482 struct nfs4_state_owner *sp;
483 struct nfs4_state *state = NULL;
484 struct nfs_server *server = NFS_SERVER(dir);
485 struct nfs4_client *clp = server->nfs4_state;
486 struct inode *inode = NULL;
487 int status;
488 struct nfs_fattr f_attr = {
489 .valid = 0,
490 };
491 struct nfs_openargs o_arg = {
492 .fh = NFS_FH(dir),
493 .open_flags = flags,
494 .name = &dentry->d_name,
495 .server = server,
496 .bitmask = server->attr_bitmask,
497 .claim = NFS4_OPEN_CLAIM_NULL,
498 };
499 struct nfs_openres o_res = {
500 .f_attr = &f_attr,
501 .server = server,
502 };
503 struct rpc_message msg = {
504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
505 .rpc_argp = &o_arg,
506 .rpc_resp = &o_res,
507 .rpc_cred = cred,
508 };
509
510 /* Protect against reboot recovery conflicts */
511 down_read(&clp->cl_sem);
512 status = -ENOMEM;
513 if (!(sp = nfs4_get_state_owner(server, cred))) {
514 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
515 goto out_err;
516 }
517 if (flags & O_EXCL) {
518 u32 *p = (u32 *) o_arg.u.verifier.data;
519 p[0] = jiffies;
520 p[1] = current->pid;
521 } else
522 o_arg.u.attrs = sattr;
523 /* Serialization for the sequence id */
524 down(&sp->so_sema);
525 o_arg.seqid = sp->so_seqid;
526 o_arg.id = sp->so_id;
527 o_arg.clientid = clp->cl_clientid,
528
529 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
530 nfs4_increment_seqid(status, sp);
531 if (status)
532 goto out_err;
533 update_changeattr(dir, &o_res.cinfo);
534 if(o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) {
535 status = _nfs4_proc_open_confirm(server->client, &o_res.fh,
536 sp, &o_res.stateid);
537 if (status != 0)
538 goto out_err;
539 }
540 if (!(f_attr.valid & NFS_ATTR_FATTR)) {
541 status = server->rpc_ops->getattr(server, &o_res.fh, &f_attr);
542 if (status < 0)
543 goto out_err;
544 }
545
546 status = -ENOMEM;
547 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
548 if (!inode)
549 goto out_err;
550 state = nfs4_get_open_state(inode, sp);
551 if (!state)
552 goto out_err;
553 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
554 spin_lock(&inode->i_lock);
555 if (flags & FMODE_READ)
556 state->nreaders++;
557 if (flags & FMODE_WRITE)
558 state->nwriters++;
559 state->state |= flags & (FMODE_READ|FMODE_WRITE);
560 spin_unlock(&inode->i_lock);
561 if (o_res.delegation_type != 0)
562 nfs_inode_set_delegation(inode, cred, &o_res);
563 up(&sp->so_sema);
564 nfs4_put_state_owner(sp);
565 up_read(&clp->cl_sem);
566 *res = state;
567 return 0;
568 out_err:
569 if (sp != NULL) {
570 if (state != NULL)
571 nfs4_put_open_state(state);
572 up(&sp->so_sema);
573 nfs4_put_state_owner(sp);
574 }
575 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
576 up_read(&clp->cl_sem);
577 if (inode != NULL)
578 iput(inode);
579 *res = NULL;
580 return status;
581 }
582
583
584 struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
585 {
586 struct nfs4_exception exception = { };
587 struct nfs4_state *res;
588 int status;
589
590 do {
591 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
592 if (status == 0)
593 break;
594 /* NOTE: BAD_SEQID means the server and client disagree about the
595 * book-keeping w.r.t. state-changing operations
596 * (OPEN/CLOSE/LOCK/LOCKU...)
597 * It is actually a sign of a bug on the client or on the server.
598 *
599 * If we receive a BAD_SEQID error in the particular case of
600 * doing an OPEN, we assume that nfs4_increment_seqid() will
601 * have unhashed the old state_owner for us, and that we can
602 * therefore safely retry using a new one. We should still warn
603 * the user though...
604 */
605 if (status == -NFS4ERR_BAD_SEQID) {
606 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
607 exception.retry = 1;
608 continue;
609 }
610 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
611 status, &exception));
612 } while (exception.retry);
613 return res;
614 }
615
616 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
617 struct nfs_fh *fhandle, struct iattr *sattr,
618 struct nfs4_state *state)
619 {
620 struct nfs_setattrargs arg = {
621 .fh = fhandle,
622 .iap = sattr,
623 .server = server,
624 .bitmask = server->attr_bitmask,
625 };
626 struct nfs_setattrres res = {
627 .fattr = fattr,
628 .server = server,
629 };
630 struct rpc_message msg = {
631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
632 .rpc_argp = &arg,
633 .rpc_resp = &res,
634 };
635
636 fattr->valid = 0;
637
638 if (state != NULL)
639 msg.rpc_cred = state->owner->so_cred;
640 if (sattr->ia_valid & ATTR_SIZE)
641 nfs4_copy_stateid(&arg.stateid, state, NULL);
642 else
643 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
644
645 return rpc_call_sync(server->client, &msg, 0);
646 }
647
648 int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
649 struct nfs_fh *fhandle, struct iattr *sattr,
650 struct nfs4_state *state)
651 {
652 struct nfs4_exception exception = { };
653 int err;
654 do {
655 err = nfs4_handle_exception(server,
656 _nfs4_do_setattr(server, fattr, fhandle, sattr,
657 state),
658 &exception);
659 } while (exception.retry);
660 return err;
661 }
662
663 struct nfs4_closedata {
664 struct inode *inode;
665 struct nfs4_state *state;
666 struct nfs_closeargs arg;
667 struct nfs_closeres res;
668 };
669
670 static void nfs4_close_done(struct rpc_task *task)
671 {
672 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
673 struct nfs4_state *state = calldata->state;
674 struct nfs4_state_owner *sp = state->owner;
675 struct nfs_server *server = NFS_SERVER(calldata->inode);
676
677 /* hmm. we are done with the inode, and in the process of freeing
678 * the state_owner. we keep this around to process errors
679 */
680 nfs4_increment_seqid(task->tk_status, sp);
681 switch (task->tk_status) {
682 case 0:
683 state->state = calldata->arg.open_flags;
684 memcpy(&state->stateid, &calldata->res.stateid,
685 sizeof(state->stateid));
686 break;
687 case -NFS4ERR_STALE_STATEID:
688 case -NFS4ERR_EXPIRED:
689 state->state = calldata->arg.open_flags;
690 nfs4_schedule_state_recovery(server->nfs4_state);
691 break;
692 default:
693 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
694 rpc_restart_call(task);
695 return;
696 }
697 }
698 nfs4_put_open_state(state);
699 up(&sp->so_sema);
700 nfs4_put_state_owner(sp);
701 up_read(&server->nfs4_state->cl_sem);
702 kfree(calldata);
703 }
704
705 static inline int nfs4_close_call(struct rpc_clnt *clnt, struct nfs4_closedata *calldata)
706 {
707 struct rpc_message msg = {
708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
709 .rpc_argp = &calldata->arg,
710 .rpc_resp = &calldata->res,
711 .rpc_cred = calldata->state->owner->so_cred,
712 };
713 if (calldata->arg.open_flags != 0)
714 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
715 return rpc_call_async(clnt, &msg, 0, nfs4_close_done, calldata);
716 }
717
718 /*
719 * It is possible for data to be read/written from a mem-mapped file
720 * after the sys_close call (which hits the vfs layer as a flush).
721 * This means that we can't safely call nfsv4 close on a file until
722 * the inode is cleared. This in turn means that we are not good
723 * NFSv4 citizens - we do not indicate to the server to update the file's
724 * share state even when we are done with one of the three share
725 * stateid's in the inode.
726 *
727 * NOTE: Caller must be holding the sp->so_owner semaphore!
728 */
729 int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
730 {
731 struct nfs4_closedata *calldata;
732 int status;
733
734 /* Tell caller we're done */
735 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
736 state->state = mode;
737 return 0;
738 }
739 calldata = (struct nfs4_closedata *)kmalloc(sizeof(*calldata), GFP_KERNEL);
740 if (calldata == NULL)
741 return -ENOMEM;
742 calldata->inode = inode;
743 calldata->state = state;
744 calldata->arg.fh = NFS_FH(inode);
745 /* Serialization for the sequence id */
746 calldata->arg.seqid = state->owner->so_seqid;
747 calldata->arg.open_flags = mode;
748 memcpy(&calldata->arg.stateid, &state->stateid,
749 sizeof(calldata->arg.stateid));
750 status = nfs4_close_call(NFS_SERVER(inode)->client, calldata);
751 /*
752 * Return -EINPROGRESS on success in order to indicate to the
753 * caller that an asynchronous RPC call has been launched, and
754 * that it will release the semaphores on completion.
755 */
756 return (status == 0) ? -EINPROGRESS : status;
757 }
758
759 struct inode *
760 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
761 {
762 struct iattr attr;
763 struct rpc_cred *cred;
764 struct nfs4_state *state;
765
766 if (nd->flags & LOOKUP_CREATE) {
767 attr.ia_mode = nd->intent.open.create_mode;
768 attr.ia_valid = ATTR_MODE;
769 if (!IS_POSIXACL(dir))
770 attr.ia_mode &= ~current->fs->umask;
771 } else {
772 attr.ia_valid = 0;
773 BUG_ON(nd->intent.open.flags & O_CREAT);
774 }
775
776 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
777 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
778 put_rpccred(cred);
779 if (IS_ERR(state))
780 return (struct inode *)state;
781 return state->inode;
782 }
783
784 int
785 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags)
786 {
787 struct rpc_cred *cred;
788 struct nfs4_state *state;
789 struct inode *inode;
790
791 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
792 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
793 if (IS_ERR(state))
794 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
795 put_rpccred(cred);
796 if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0)
797 return 1;
798 if (IS_ERR(state))
799 return 0;
800 inode = state->inode;
801 if (inode == dentry->d_inode) {
802 iput(inode);
803 return 1;
804 }
805 d_drop(dentry);
806 nfs4_close_state(state, openflags);
807 iput(inode);
808 return 0;
809 }
810
811
812 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
813 {
814 struct nfs4_server_caps_res res = {};
815 struct rpc_message msg = {
816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
817 .rpc_argp = fhandle,
818 .rpc_resp = &res,
819 };
820 int status;
821
822 status = rpc_call_sync(server->client, &msg, 0);
823 if (status == 0) {
824 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
825 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
826 server->caps |= NFS_CAP_ACLS;
827 if (res.has_links != 0)
828 server->caps |= NFS_CAP_HARDLINKS;
829 if (res.has_symlinks != 0)
830 server->caps |= NFS_CAP_SYMLINKS;
831 server->acl_bitmask = res.acl_bitmask;
832 }
833 return status;
834 }
835
836 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
837 {
838 struct nfs4_exception exception = { };
839 int err;
840 do {
841 err = nfs4_handle_exception(server,
842 _nfs4_server_capabilities(server, fhandle),
843 &exception);
844 } while (exception.retry);
845 return err;
846 }
847
848 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
849 struct nfs_fsinfo *info)
850 {
851 struct nfs_fattr * fattr = info->fattr;
852 struct nfs4_lookup_root_arg args = {
853 .bitmask = nfs4_fattr_bitmap,
854 };
855 struct nfs4_lookup_res res = {
856 .server = server,
857 .fattr = fattr,
858 .fh = fhandle,
859 };
860 struct rpc_message msg = {
861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
862 .rpc_argp = &args,
863 .rpc_resp = &res,
864 };
865 fattr->valid = 0;
866 return rpc_call_sync(server->client, &msg, 0);
867 }
868
869 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
870 struct nfs_fsinfo *info)
871 {
872 struct nfs4_exception exception = { };
873 int err;
874 do {
875 err = nfs4_handle_exception(server,
876 _nfs4_lookup_root(server, fhandle, info),
877 &exception);
878 } while (exception.retry);
879 return err;
880 }
881
882 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
883 struct nfs_fsinfo *info)
884 {
885 struct nfs_fattr * fattr = info->fattr;
886 unsigned char * p;
887 struct qstr q;
888 struct nfs4_lookup_arg args = {
889 .dir_fh = fhandle,
890 .name = &q,
891 .bitmask = nfs4_fattr_bitmap,
892 };
893 struct nfs4_lookup_res res = {
894 .server = server,
895 .fattr = fattr,
896 .fh = fhandle,
897 };
898 struct rpc_message msg = {
899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
900 .rpc_argp = &args,
901 .rpc_resp = &res,
902 };
903 int status;
904
905 /*
906 * Now we do a separate LOOKUP for each component of the mount path.
907 * The LOOKUPs are done separately so that we can conveniently
908 * catch an ERR_WRONGSEC if it occurs along the way...
909 */
910 status = nfs4_lookup_root(server, fhandle, info);
911 if (status)
912 goto out;
913
914 p = server->mnt_path;
915 for (;;) {
916 struct nfs4_exception exception = { };
917
918 while (*p == '/')
919 p++;
920 if (!*p)
921 break;
922 q.name = p;
923 while (*p && (*p != '/'))
924 p++;
925 q.len = p - q.name;
926
927 do {
928 fattr->valid = 0;
929 status = nfs4_handle_exception(server,
930 rpc_call_sync(server->client, &msg, 0),
931 &exception);
932 } while (exception.retry);
933 if (status == 0)
934 continue;
935 if (status == -ENOENT) {
936 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
937 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
938 }
939 break;
940 }
941 if (status == 0)
942 status = nfs4_server_capabilities(server, fhandle);
943 if (status == 0)
944 status = nfs4_do_fsinfo(server, fhandle, info);
945 out:
946 return status;
947 }
948
949 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
950 {
951 struct nfs4_getattr_arg args = {
952 .fh = fhandle,
953 .bitmask = server->attr_bitmask,
954 };
955 struct nfs4_getattr_res res = {
956 .fattr = fattr,
957 .server = server,
958 };
959 struct rpc_message msg = {
960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
961 .rpc_argp = &args,
962 .rpc_resp = &res,
963 };
964
965 fattr->valid = 0;
966 return rpc_call_sync(server->client, &msg, 0);
967 }
968
969 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
970 {
971 struct nfs4_exception exception = { };
972 int err;
973 do {
974 err = nfs4_handle_exception(server,
975 _nfs4_proc_getattr(server, fhandle, fattr),
976 &exception);
977 } while (exception.retry);
978 return err;
979 }
980
981 /*
982 * The file is not closed if it is opened due to the a request to change
983 * the size of the file. The open call will not be needed once the
984 * VFS layer lookup-intents are implemented.
985 *
986 * Close is called when the inode is destroyed.
987 * If we haven't opened the file for O_WRONLY, we
988 * need to in the size_change case to obtain a stateid.
989 *
990 * Got race?
991 * Because OPEN is always done by name in nfsv4, it is
992 * possible that we opened a different file by the same
993 * name. We can recognize this race condition, but we
994 * can't do anything about it besides returning an error.
995 *
996 * This will be fixed with VFS changes (lookup-intent).
997 */
998 static int
999 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1000 struct iattr *sattr)
1001 {
1002 struct inode * inode = dentry->d_inode;
1003 int size_change = sattr->ia_valid & ATTR_SIZE;
1004 struct nfs4_state *state = NULL;
1005 int need_iput = 0;
1006 int status;
1007
1008 fattr->valid = 0;
1009
1010 if (size_change) {
1011 struct rpc_cred *cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1012 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1013 if (state == NULL) {
1014 state = nfs4_open_delegated(dentry->d_inode,
1015 FMODE_WRITE, cred);
1016 if (IS_ERR(state))
1017 state = nfs4_do_open(dentry->d_parent->d_inode,
1018 dentry, FMODE_WRITE,
1019 NULL, cred);
1020 need_iput = 1;
1021 }
1022 put_rpccred(cred);
1023 if (IS_ERR(state))
1024 return PTR_ERR(state);
1025
1026 if (state->inode != inode) {
1027 printk(KERN_WARNING "nfs: raced in setattr (%p != %p), returning -EIO\n", inode, state->inode);
1028 status = -EIO;
1029 goto out;
1030 }
1031 }
1032 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1033 NFS_FH(inode), sattr, state);
1034 out:
1035 if (state) {
1036 inode = state->inode;
1037 nfs4_close_state(state, FMODE_WRITE);
1038 if (need_iput)
1039 iput(inode);
1040 }
1041 return status;
1042 }
1043
1044 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1045 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1046 {
1047 int status;
1048 struct nfs_server *server = NFS_SERVER(dir);
1049 struct nfs4_lookup_arg args = {
1050 .bitmask = server->attr_bitmask,
1051 .dir_fh = NFS_FH(dir),
1052 .name = name,
1053 };
1054 struct nfs4_lookup_res res = {
1055 .server = server,
1056 .fattr = fattr,
1057 .fh = fhandle,
1058 };
1059 struct rpc_message msg = {
1060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1061 .rpc_argp = &args,
1062 .rpc_resp = &res,
1063 };
1064
1065 fattr->valid = 0;
1066
1067 dprintk("NFS call lookup %s\n", name->name);
1068 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1069 dprintk("NFS reply lookup: %d\n", status);
1070 return status;
1071 }
1072
1073 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1074 {
1075 struct nfs4_exception exception = { };
1076 int err;
1077 do {
1078 err = nfs4_handle_exception(NFS_SERVER(dir),
1079 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1080 &exception);
1081 } while (exception.retry);
1082 return err;
1083 }
1084
1085 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1086 {
1087 struct nfs4_accessargs args = {
1088 .fh = NFS_FH(inode),
1089 };
1090 struct nfs4_accessres res = { 0 };
1091 struct rpc_message msg = {
1092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1093 .rpc_argp = &args,
1094 .rpc_resp = &res,
1095 .rpc_cred = entry->cred,
1096 };
1097 int mode = entry->mask;
1098 int status;
1099
1100 /*
1101 * Determine which access bits we want to ask for...
1102 */
1103 if (mode & MAY_READ)
1104 args.access |= NFS4_ACCESS_READ;
1105 if (S_ISDIR(inode->i_mode)) {
1106 if (mode & MAY_WRITE)
1107 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1108 if (mode & MAY_EXEC)
1109 args.access |= NFS4_ACCESS_LOOKUP;
1110 } else {
1111 if (mode & MAY_WRITE)
1112 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1113 if (mode & MAY_EXEC)
1114 args.access |= NFS4_ACCESS_EXECUTE;
1115 }
1116 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1117 if (!status) {
1118 entry->mask = 0;
1119 if (res.access & NFS4_ACCESS_READ)
1120 entry->mask |= MAY_READ;
1121 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1122 entry->mask |= MAY_WRITE;
1123 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1124 entry->mask |= MAY_EXEC;
1125 }
1126 return status;
1127 }
1128
1129 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1130 {
1131 struct nfs4_exception exception = { };
1132 int err;
1133 do {
1134 err = nfs4_handle_exception(NFS_SERVER(inode),
1135 _nfs4_proc_access(inode, entry),
1136 &exception);
1137 } while (exception.retry);
1138 return err;
1139 }
1140
1141 /*
1142 * TODO: For the time being, we don't try to get any attributes
1143 * along with any of the zero-copy operations READ, READDIR,
1144 * READLINK, WRITE.
1145 *
1146 * In the case of the first three, we want to put the GETATTR
1147 * after the read-type operation -- this is because it is hard
1148 * to predict the length of a GETATTR response in v4, and thus
1149 * align the READ data correctly. This means that the GETATTR
1150 * may end up partially falling into the page cache, and we should
1151 * shift it into the 'tail' of the xdr_buf before processing.
1152 * To do this efficiently, we need to know the total length
1153 * of data received, which doesn't seem to be available outside
1154 * of the RPC layer.
1155 *
1156 * In the case of WRITE, we also want to put the GETATTR after
1157 * the operation -- in this case because we want to make sure
1158 * we get the post-operation mtime and size. This means that
1159 * we can't use xdr_encode_pages() as written: we need a variant
1160 * of it which would leave room in the 'tail' iovec.
1161 *
1162 * Both of these changes to the XDR layer would in fact be quite
1163 * minor, but I decided to leave them for a subsequent patch.
1164 */
1165 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1166 unsigned int pgbase, unsigned int pglen)
1167 {
1168 struct nfs4_readlink args = {
1169 .fh = NFS_FH(inode),
1170 .pgbase = pgbase,
1171 .pglen = pglen,
1172 .pages = &page,
1173 };
1174 struct rpc_message msg = {
1175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1176 .rpc_argp = &args,
1177 .rpc_resp = NULL,
1178 };
1179
1180 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1181 }
1182
1183 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1184 unsigned int pgbase, unsigned int pglen)
1185 {
1186 struct nfs4_exception exception = { };
1187 int err;
1188 do {
1189 err = nfs4_handle_exception(NFS_SERVER(inode),
1190 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1191 &exception);
1192 } while (exception.retry);
1193 return err;
1194 }
1195
1196 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1197 {
1198 int flags = rdata->flags;
1199 struct inode *inode = rdata->inode;
1200 struct nfs_fattr *fattr = rdata->res.fattr;
1201 struct nfs_server *server = NFS_SERVER(inode);
1202 struct rpc_message msg = {
1203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1204 .rpc_argp = &rdata->args,
1205 .rpc_resp = &rdata->res,
1206 .rpc_cred = rdata->cred,
1207 };
1208 unsigned long timestamp = jiffies;
1209 int status;
1210
1211 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1212 (long long) rdata->args.offset);
1213
1214 fattr->valid = 0;
1215 status = rpc_call_sync(server->client, &msg, flags);
1216 if (!status)
1217 renew_lease(server, timestamp);
1218 dprintk("NFS reply read: %d\n", status);
1219 return status;
1220 }
1221
1222 static int nfs4_proc_read(struct nfs_read_data *rdata)
1223 {
1224 struct nfs4_exception exception = { };
1225 int err;
1226 do {
1227 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1228 _nfs4_proc_read(rdata),
1229 &exception);
1230 } while (exception.retry);
1231 return err;
1232 }
1233
1234 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1235 {
1236 int rpcflags = wdata->flags;
1237 struct inode *inode = wdata->inode;
1238 struct nfs_fattr *fattr = wdata->res.fattr;
1239 struct nfs_server *server = NFS_SERVER(inode);
1240 struct rpc_message msg = {
1241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1242 .rpc_argp = &wdata->args,
1243 .rpc_resp = &wdata->res,
1244 .rpc_cred = wdata->cred,
1245 };
1246 int status;
1247
1248 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1249 (long long) wdata->args.offset);
1250
1251 fattr->valid = 0;
1252 status = rpc_call_sync(server->client, &msg, rpcflags);
1253 dprintk("NFS reply write: %d\n", status);
1254 return status;
1255 }
1256
1257 static int nfs4_proc_write(struct nfs_write_data *wdata)
1258 {
1259 struct nfs4_exception exception = { };
1260 int err;
1261 do {
1262 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1263 _nfs4_proc_write(wdata),
1264 &exception);
1265 } while (exception.retry);
1266 return err;
1267 }
1268
1269 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1270 {
1271 struct inode *inode = cdata->inode;
1272 struct nfs_fattr *fattr = cdata->res.fattr;
1273 struct nfs_server *server = NFS_SERVER(inode);
1274 struct rpc_message msg = {
1275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1276 .rpc_argp = &cdata->args,
1277 .rpc_resp = &cdata->res,
1278 .rpc_cred = cdata->cred,
1279 };
1280 int status;
1281
1282 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1283 (long long) cdata->args.offset);
1284
1285 fattr->valid = 0;
1286 status = rpc_call_sync(server->client, &msg, 0);
1287 dprintk("NFS reply commit: %d\n", status);
1288 return status;
1289 }
1290
1291 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1292 {
1293 struct nfs4_exception exception = { };
1294 int err;
1295 do {
1296 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1297 _nfs4_proc_commit(cdata),
1298 &exception);
1299 } while (exception.retry);
1300 return err;
1301 }
1302
1303 /*
1304 * Got race?
1305 * We will need to arrange for the VFS layer to provide an atomic open.
1306 * Until then, this create/open method is prone to inefficiency and race
1307 * conditions due to the lookup, create, and open VFS calls from sys_open()
1308 * placed on the wire.
1309 *
1310 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1311 * The file will be opened again in the subsequent VFS open call
1312 * (nfs4_proc_file_open).
1313 *
1314 * The open for read will just hang around to be used by any process that
1315 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1316 */
1317
1318 static struct inode *
1319 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1320 int flags)
1321 {
1322 struct inode *inode;
1323 struct nfs4_state *state = NULL;
1324 struct rpc_cred *cred;
1325
1326 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1327 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1328 put_rpccred(cred);
1329 if (!IS_ERR(state)) {
1330 inode = state->inode;
1331 if (flags & O_EXCL) {
1332 struct nfs_fattr fattr;
1333 int status;
1334 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1335 NFS_FH(inode), sattr, state);
1336 if (status != 0) {
1337 nfs4_close_state(state, flags);
1338 iput(inode);
1339 inode = ERR_PTR(status);
1340 }
1341 }
1342 } else
1343 inode = (struct inode *)state;
1344 return inode;
1345 }
1346
1347 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1348 {
1349 struct nfs4_remove_arg args = {
1350 .fh = NFS_FH(dir),
1351 .name = name,
1352 };
1353 struct nfs4_change_info res;
1354 struct rpc_message msg = {
1355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1356 .rpc_argp = &args,
1357 .rpc_resp = &res,
1358 };
1359 int status;
1360
1361 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1362 if (status == 0)
1363 update_changeattr(dir, &res);
1364 return status;
1365 }
1366
1367 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1368 {
1369 struct nfs4_exception exception = { };
1370 int err;
1371 do {
1372 err = nfs4_handle_exception(NFS_SERVER(dir),
1373 _nfs4_proc_remove(dir, name),
1374 &exception);
1375 } while (exception.retry);
1376 return err;
1377 }
1378
1379 struct unlink_desc {
1380 struct nfs4_remove_arg args;
1381 struct nfs4_change_info res;
1382 };
1383
1384 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1385 struct qstr *name)
1386 {
1387 struct unlink_desc *up;
1388
1389 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1390 if (!up)
1391 return -ENOMEM;
1392
1393 up->args.fh = NFS_FH(dir->d_inode);
1394 up->args.name = name;
1395
1396 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1397 msg->rpc_argp = &up->args;
1398 msg->rpc_resp = &up->res;
1399 return 0;
1400 }
1401
1402 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1403 {
1404 struct rpc_message *msg = &task->tk_msg;
1405 struct unlink_desc *up;
1406
1407 if (msg->rpc_resp != NULL) {
1408 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1409 update_changeattr(dir->d_inode, &up->res);
1410 kfree(up);
1411 msg->rpc_resp = NULL;
1412 msg->rpc_argp = NULL;
1413 }
1414 return 0;
1415 }
1416
1417 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1418 struct inode *new_dir, struct qstr *new_name)
1419 {
1420 struct nfs4_rename_arg arg = {
1421 .old_dir = NFS_FH(old_dir),
1422 .new_dir = NFS_FH(new_dir),
1423 .old_name = old_name,
1424 .new_name = new_name,
1425 };
1426 struct nfs4_rename_res res = { };
1427 struct rpc_message msg = {
1428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1429 .rpc_argp = &arg,
1430 .rpc_resp = &res,
1431 };
1432 int status;
1433
1434 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1435
1436 if (!status) {
1437 update_changeattr(old_dir, &res.old_cinfo);
1438 update_changeattr(new_dir, &res.new_cinfo);
1439 }
1440 return status;
1441 }
1442
1443 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1444 struct inode *new_dir, struct qstr *new_name)
1445 {
1446 struct nfs4_exception exception = { };
1447 int err;
1448 do {
1449 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1450 _nfs4_proc_rename(old_dir, old_name,
1451 new_dir, new_name),
1452 &exception);
1453 } while (exception.retry);
1454 return err;
1455 }
1456
1457 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1458 {
1459 struct nfs4_link_arg arg = {
1460 .fh = NFS_FH(inode),
1461 .dir_fh = NFS_FH(dir),
1462 .name = name,
1463 };
1464 struct nfs4_change_info cinfo = { };
1465 struct rpc_message msg = {
1466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1467 .rpc_argp = &arg,
1468 .rpc_resp = &cinfo,
1469 };
1470 int status;
1471
1472 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1473 if (!status)
1474 update_changeattr(dir, &cinfo);
1475
1476 return status;
1477 }
1478
1479 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1480 {
1481 struct nfs4_exception exception = { };
1482 int err;
1483 do {
1484 err = nfs4_handle_exception(NFS_SERVER(inode),
1485 _nfs4_proc_link(inode, dir, name),
1486 &exception);
1487 } while (exception.retry);
1488 return err;
1489 }
1490
1491 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1492 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1493 struct nfs_fattr *fattr)
1494 {
1495 struct nfs_server *server = NFS_SERVER(dir);
1496 struct nfs4_create_arg arg = {
1497 .dir_fh = NFS_FH(dir),
1498 .server = server,
1499 .name = name,
1500 .attrs = sattr,
1501 .ftype = NF4LNK,
1502 .bitmask = server->attr_bitmask,
1503 };
1504 struct nfs4_create_res res = {
1505 .server = server,
1506 .fh = fhandle,
1507 .fattr = fattr,
1508 };
1509 struct rpc_message msg = {
1510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1511 .rpc_argp = &arg,
1512 .rpc_resp = &res,
1513 };
1514 int status;
1515
1516 if (path->len > NFS4_MAXPATHLEN)
1517 return -ENAMETOOLONG;
1518 arg.u.symlink = path;
1519 fattr->valid = 0;
1520
1521 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1522 if (!status)
1523 update_changeattr(dir, &res.dir_cinfo);
1524 return status;
1525 }
1526
1527 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1528 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1529 struct nfs_fattr *fattr)
1530 {
1531 struct nfs4_exception exception = { };
1532 int err;
1533 do {
1534 err = nfs4_handle_exception(NFS_SERVER(dir),
1535 _nfs4_proc_symlink(dir, name, path, sattr,
1536 fhandle, fattr),
1537 &exception);
1538 } while (exception.retry);
1539 return err;
1540 }
1541
1542 static int _nfs4_proc_mkdir(struct inode *dir, struct qstr *name,
1543 struct iattr *sattr, struct nfs_fh *fhandle,
1544 struct nfs_fattr *fattr)
1545 {
1546 struct nfs_server *server = NFS_SERVER(dir);
1547 struct nfs4_create_arg arg = {
1548 .dir_fh = NFS_FH(dir),
1549 .server = server,
1550 .name = name,
1551 .attrs = sattr,
1552 .ftype = NF4DIR,
1553 .bitmask = server->attr_bitmask,
1554 };
1555 struct nfs4_create_res res = {
1556 .server = server,
1557 .fh = fhandle,
1558 .fattr = fattr,
1559 };
1560 struct rpc_message msg = {
1561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1562 .rpc_argp = &arg,
1563 .rpc_resp = &res,
1564 };
1565 int status;
1566
1567 fattr->valid = 0;
1568
1569 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1570 if (!status)
1571 update_changeattr(dir, &res.dir_cinfo);
1572 return status;
1573 }
1574
1575 static int nfs4_proc_mkdir(struct inode *dir, struct qstr *name,
1576 struct iattr *sattr, struct nfs_fh *fhandle,
1577 struct nfs_fattr *fattr)
1578 {
1579 struct nfs4_exception exception = { };
1580 int err;
1581 do {
1582 err = nfs4_handle_exception(NFS_SERVER(dir),
1583 _nfs4_proc_mkdir(dir, name, sattr,
1584 fhandle, fattr),
1585 &exception);
1586 } while (exception.retry);
1587 return err;
1588 }
1589
1590 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1591 u64 cookie, struct page *page, unsigned int count, int plus)
1592 {
1593 struct inode *dir = dentry->d_inode;
1594 struct nfs4_readdir_arg args = {
1595 .fh = NFS_FH(dir),
1596 .pages = &page,
1597 .pgbase = 0,
1598 .count = count,
1599 };
1600 struct nfs4_readdir_res res;
1601 struct rpc_message msg = {
1602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1603 .rpc_argp = &args,
1604 .rpc_resp = &res,
1605 .rpc_cred = cred,
1606 };
1607 int status;
1608
1609 lock_kernel();
1610 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1611 res.pgbase = args.pgbase;
1612 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1613 if (status == 0)
1614 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1615 unlock_kernel();
1616 return status;
1617 }
1618
1619 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1620 u64 cookie, struct page *page, unsigned int count, int plus)
1621 {
1622 struct nfs4_exception exception = { };
1623 int err;
1624 do {
1625 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1626 _nfs4_proc_readdir(dentry, cred, cookie,
1627 page, count, plus),
1628 &exception);
1629 } while (exception.retry);
1630 return err;
1631 }
1632
1633 static int _nfs4_proc_mknod(struct inode *dir, struct qstr *name,
1634 struct iattr *sattr, dev_t rdev, struct nfs_fh *fh,
1635 struct nfs_fattr *fattr)
1636 {
1637 struct nfs_server *server = NFS_SERVER(dir);
1638 struct nfs4_create_arg arg = {
1639 .dir_fh = NFS_FH(dir),
1640 .server = server,
1641 .name = name,
1642 .attrs = sattr,
1643 .bitmask = server->attr_bitmask,
1644 };
1645 struct nfs4_create_res res = {
1646 .server = server,
1647 .fh = fh,
1648 .fattr = fattr,
1649 };
1650 struct rpc_message msg = {
1651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1652 .rpc_argp = &arg,
1653 .rpc_resp = &res,
1654 };
1655 int status;
1656 int mode = sattr->ia_mode;
1657
1658 fattr->valid = 0;
1659
1660 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1661 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1662 if (S_ISFIFO(mode))
1663 arg.ftype = NF4FIFO;
1664 else if (S_ISBLK(mode)) {
1665 arg.ftype = NF4BLK;
1666 arg.u.device.specdata1 = MAJOR(rdev);
1667 arg.u.device.specdata2 = MINOR(rdev);
1668 }
1669 else if (S_ISCHR(mode)) {
1670 arg.ftype = NF4CHR;
1671 arg.u.device.specdata1 = MAJOR(rdev);
1672 arg.u.device.specdata2 = MINOR(rdev);
1673 }
1674 else
1675 arg.ftype = NF4SOCK;
1676
1677 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1678 if (!status)
1679 update_changeattr(dir, &res.dir_cinfo);
1680 return status;
1681 }
1682
1683 static int nfs4_proc_mknod(struct inode *dir, struct qstr *name,
1684 struct iattr *sattr, dev_t rdev, struct nfs_fh *fh,
1685 struct nfs_fattr *fattr)
1686 {
1687 struct nfs4_exception exception = { };
1688 int err;
1689 do {
1690 err = nfs4_handle_exception(NFS_SERVER(dir),
1691 _nfs4_proc_mknod(dir, name, sattr, rdev,
1692 fh, fattr),
1693 &exception);
1694 } while (exception.retry);
1695 return err;
1696 }
1697
1698 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1699 struct nfs_fsstat *fsstat)
1700 {
1701 struct nfs4_statfs_arg args = {
1702 .fh = fhandle,
1703 .bitmask = server->attr_bitmask,
1704 };
1705 struct rpc_message msg = {
1706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1707 .rpc_argp = &args,
1708 .rpc_resp = fsstat,
1709 };
1710
1711 fsstat->fattr->valid = 0;
1712 return rpc_call_sync(server->client, &msg, 0);
1713 }
1714
1715 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1716 {
1717 struct nfs4_exception exception = { };
1718 int err;
1719 do {
1720 err = nfs4_handle_exception(server,
1721 _nfs4_proc_statfs(server, fhandle, fsstat),
1722 &exception);
1723 } while (exception.retry);
1724 return err;
1725 }
1726
1727 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
1728 struct nfs_fsinfo *fsinfo)
1729 {
1730 struct nfs4_fsinfo_arg args = {
1731 .fh = fhandle,
1732 .bitmask = server->attr_bitmask,
1733 };
1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
1736 .rpc_argp = &args,
1737 .rpc_resp = fsinfo,
1738 };
1739
1740 return rpc_call_sync(server->client, &msg, 0);
1741 }
1742
1743 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1744 {
1745 struct nfs4_exception exception = { };
1746 int err;
1747
1748 do {
1749 err = nfs4_handle_exception(server,
1750 _nfs4_do_fsinfo(server, fhandle, fsinfo),
1751 &exception);
1752 } while (exception.retry);
1753 return err;
1754 }
1755
1756 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1757 {
1758 fsinfo->fattr->valid = 0;
1759 return nfs4_do_fsinfo(server, fhandle, fsinfo);
1760 }
1761
1762 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1763 struct nfs_pathconf *pathconf)
1764 {
1765 struct nfs4_pathconf_arg args = {
1766 .fh = fhandle,
1767 .bitmask = server->attr_bitmask,
1768 };
1769 struct rpc_message msg = {
1770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
1771 .rpc_argp = &args,
1772 .rpc_resp = pathconf,
1773 };
1774
1775 /* None of the pathconf attributes are mandatory to implement */
1776 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
1777 memset(pathconf, 0, sizeof(*pathconf));
1778 return 0;
1779 }
1780
1781 pathconf->fattr->valid = 0;
1782 return rpc_call_sync(server->client, &msg, 0);
1783 }
1784
1785 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1786 struct nfs_pathconf *pathconf)
1787 {
1788 struct nfs4_exception exception = { };
1789 int err;
1790
1791 do {
1792 err = nfs4_handle_exception(server,
1793 _nfs4_proc_pathconf(server, fhandle, pathconf),
1794 &exception);
1795 } while (exception.retry);
1796 return err;
1797 }
1798
1799 static void
1800 nfs4_read_done(struct rpc_task *task)
1801 {
1802 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
1803 struct inode *inode = data->inode;
1804
1805 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1806 rpc_restart_call(task);
1807 return;
1808 }
1809 if (task->tk_status > 0)
1810 renew_lease(NFS_SERVER(inode), data->timestamp);
1811 /* Call back common NFS readpage processing */
1812 nfs_readpage_result(task);
1813 }
1814
1815 static void
1816 nfs4_proc_read_setup(struct nfs_read_data *data)
1817 {
1818 struct rpc_task *task = &data->task;
1819 struct rpc_message msg = {
1820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1821 .rpc_argp = &data->args,
1822 .rpc_resp = &data->res,
1823 .rpc_cred = data->cred,
1824 };
1825 struct inode *inode = data->inode;
1826 int flags;
1827
1828 data->timestamp = jiffies;
1829
1830 /* N.B. Do we need to test? Never called for swapfile inode */
1831 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
1832
1833 /* Finalize the task. */
1834 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
1835 rpc_call_setup(task, &msg, 0);
1836 }
1837
1838 static void
1839 nfs4_write_done(struct rpc_task *task)
1840 {
1841 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
1842 struct inode *inode = data->inode;
1843
1844 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1845 rpc_restart_call(task);
1846 return;
1847 }
1848 if (task->tk_status >= 0)
1849 renew_lease(NFS_SERVER(inode), data->timestamp);
1850 /* Call back common NFS writeback processing */
1851 nfs_writeback_done(task);
1852 }
1853
1854 static void
1855 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
1856 {
1857 struct rpc_task *task = &data->task;
1858 struct rpc_message msg = {
1859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1860 .rpc_argp = &data->args,
1861 .rpc_resp = &data->res,
1862 .rpc_cred = data->cred,
1863 };
1864 struct inode *inode = data->inode;
1865 int stable;
1866 int flags;
1867
1868 if (how & FLUSH_STABLE) {
1869 if (!NFS_I(inode)->ncommit)
1870 stable = NFS_FILE_SYNC;
1871 else
1872 stable = NFS_DATA_SYNC;
1873 } else
1874 stable = NFS_UNSTABLE;
1875 data->args.stable = stable;
1876
1877 data->timestamp = jiffies;
1878
1879 /* Set the initial flags for the task. */
1880 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
1881
1882 /* Finalize the task. */
1883 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
1884 rpc_call_setup(task, &msg, 0);
1885 }
1886
1887 static void
1888 nfs4_commit_done(struct rpc_task *task)
1889 {
1890 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
1891 struct inode *inode = data->inode;
1892
1893 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
1894 rpc_restart_call(task);
1895 return;
1896 }
1897 /* Call back common NFS writeback processing */
1898 nfs_commit_done(task);
1899 }
1900
1901 static void
1902 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
1903 {
1904 struct rpc_task *task = &data->task;
1905 struct rpc_message msg = {
1906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1907 .rpc_argp = &data->args,
1908 .rpc_resp = &data->res,
1909 .rpc_cred = data->cred,
1910 };
1911 struct inode *inode = data->inode;
1912 int flags;
1913
1914 /* Set the initial flags for the task. */
1915 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
1916
1917 /* Finalize the task. */
1918 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
1919 rpc_call_setup(task, &msg, 0);
1920 }
1921
1922 /*
1923 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
1924 * standalone procedure for queueing an asynchronous RENEW.
1925 */
1926 static void
1927 renew_done(struct rpc_task *task)
1928 {
1929 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
1930 unsigned long timestamp = (unsigned long)task->tk_calldata;
1931
1932 if (task->tk_status < 0) {
1933 switch (task->tk_status) {
1934 case -NFS4ERR_STALE_CLIENTID:
1935 case -NFS4ERR_EXPIRED:
1936 case -NFS4ERR_CB_PATH_DOWN:
1937 nfs4_schedule_state_recovery(clp);
1938 }
1939 return;
1940 }
1941 spin_lock(&clp->cl_lock);
1942 if (time_before(clp->cl_last_renewal,timestamp))
1943 clp->cl_last_renewal = timestamp;
1944 spin_unlock(&clp->cl_lock);
1945 }
1946
1947 int
1948 nfs4_proc_async_renew(struct nfs4_client *clp)
1949 {
1950 struct rpc_message msg = {
1951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
1952 .rpc_argp = clp,
1953 .rpc_cred = clp->cl_cred,
1954 };
1955
1956 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
1957 renew_done, (void *)jiffies);
1958 }
1959
1960 int
1961 nfs4_proc_renew(struct nfs4_client *clp)
1962 {
1963 struct rpc_message msg = {
1964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
1965 .rpc_argp = clp,
1966 .rpc_cred = clp->cl_cred,
1967 };
1968 unsigned long now = jiffies;
1969 int status;
1970
1971 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
1972 if (status < 0)
1973 return status;
1974 spin_lock(&clp->cl_lock);
1975 if (time_before(clp->cl_last_renewal,now))
1976 clp->cl_last_renewal = now;
1977 spin_unlock(&clp->cl_lock);
1978 return 0;
1979 }
1980
1981 /*
1982 * We will need to arrange for the VFS layer to provide an atomic open.
1983 * Until then, this open method is prone to inefficiency and race conditions
1984 * due to the lookup, potential create, and open VFS calls from sys_open()
1985 * placed on the wire.
1986 */
1987 static int
1988 nfs4_proc_file_open(struct inode *inode, struct file *filp)
1989 {
1990 struct dentry *dentry = filp->f_dentry;
1991 struct nfs_open_context *ctx;
1992 struct nfs4_state *state = NULL;
1993 struct rpc_cred *cred;
1994 int status = -ENOMEM;
1995
1996 dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n",
1997 (int)dentry->d_parent->d_name.len,
1998 dentry->d_parent->d_name.name,
1999 (int)dentry->d_name.len, dentry->d_name.name);
2000
2001
2002 /* Find our open stateid */
2003 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
2004 if (unlikely(cred == NULL))
2005 return -ENOMEM;
2006 ctx = alloc_nfs_open_context(dentry, cred);
2007 put_rpccred(cred);
2008 if (unlikely(ctx == NULL))
2009 return -ENOMEM;
2010 status = -EIO; /* ERACE actually */
2011 state = nfs4_find_state(inode, cred, filp->f_mode);
2012 if (unlikely(state == NULL))
2013 goto no_state;
2014 ctx->state = state;
2015 nfs4_close_state(state, filp->f_mode);
2016 ctx->mode = filp->f_mode;
2017 nfs_file_set_open_context(filp, ctx);
2018 put_nfs_open_context(ctx);
2019 if (filp->f_mode & FMODE_WRITE)
2020 nfs_begin_data_update(inode);
2021 return 0;
2022 no_state:
2023 printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__);
2024 put_nfs_open_context(ctx);
2025 return status;
2026 }
2027
2028 /*
2029 * Release our state
2030 */
2031 static int
2032 nfs4_proc_file_release(struct inode *inode, struct file *filp)
2033 {
2034 if (filp->f_mode & FMODE_WRITE)
2035 nfs_end_data_update(inode);
2036 nfs_file_clear_open_context(filp);
2037 return 0;
2038 }
2039
2040 static int
2041 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
2042 {
2043 struct nfs4_client *clp = server->nfs4_state;
2044
2045 if (!clp || task->tk_status >= 0)
2046 return 0;
2047 switch(task->tk_status) {
2048 case -NFS4ERR_STALE_CLIENTID:
2049 case -NFS4ERR_STALE_STATEID:
2050 case -NFS4ERR_EXPIRED:
2051 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2052 nfs4_schedule_state_recovery(clp);
2053 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2054 rpc_wake_up_task(task);
2055 task->tk_status = 0;
2056 return -EAGAIN;
2057 case -NFS4ERR_GRACE:
2058 case -NFS4ERR_DELAY:
2059 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2060 task->tk_status = 0;
2061 return -EAGAIN;
2062 case -NFS4ERR_OLD_STATEID:
2063 task->tk_status = 0;
2064 return -EAGAIN;
2065 }
2066 task->tk_status = nfs4_map_errors(task->tk_status);
2067 return 0;
2068 }
2069
2070 int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2071 {
2072 DEFINE_WAIT(wait);
2073 sigset_t oldset;
2074 int interruptible, res = 0;
2075
2076 might_sleep();
2077
2078 rpc_clnt_sigmask(clnt, &oldset);
2079 interruptible = TASK_UNINTERRUPTIBLE;
2080 if (clnt->cl_intr)
2081 interruptible = TASK_INTERRUPTIBLE;
2082 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2083 nfs4_schedule_state_recovery(clp);
2084 if (clnt->cl_intr && signalled())
2085 res = -ERESTARTSYS;
2086 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2087 schedule();
2088 finish_wait(&clp->cl_waitq, &wait);
2089 rpc_clnt_sigunmask(clnt, &oldset);
2090 return res;
2091 }
2092
2093 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2094 {
2095 sigset_t oldset;
2096 int res = 0;
2097
2098 might_sleep();
2099
2100 if (*timeout <= 0)
2101 *timeout = NFS4_POLL_RETRY_MIN;
2102 if (*timeout > NFS4_POLL_RETRY_MAX)
2103 *timeout = NFS4_POLL_RETRY_MAX;
2104 rpc_clnt_sigmask(clnt, &oldset);
2105 if (clnt->cl_intr) {
2106 set_current_state(TASK_INTERRUPTIBLE);
2107 schedule_timeout(*timeout);
2108 if (signalled())
2109 res = -ERESTARTSYS;
2110 } else {
2111 set_current_state(TASK_UNINTERRUPTIBLE);
2112 schedule_timeout(*timeout);
2113 }
2114 rpc_clnt_sigunmask(clnt, &oldset);
2115 *timeout <<= 1;
2116 return res;
2117 }
2118
2119 /* This is the error handling routine for processes that are allowed
2120 * to sleep.
2121 */
2122 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2123 {
2124 struct nfs4_client *clp = server->nfs4_state;
2125 int ret = errorcode;
2126
2127 exception->retry = 0;
2128 switch(errorcode) {
2129 case 0:
2130 return 0;
2131 case -NFS4ERR_STALE_CLIENTID:
2132 case -NFS4ERR_STALE_STATEID:
2133 case -NFS4ERR_EXPIRED:
2134 ret = nfs4_wait_clnt_recover(server->client, clp);
2135 if (ret == 0)
2136 exception->retry = 1;
2137 break;
2138 case -NFS4ERR_GRACE:
2139 case -NFS4ERR_DELAY:
2140 ret = nfs4_delay(server->client, &exception->timeout);
2141 if (ret == 0)
2142 exception->retry = 1;
2143 break;
2144 case -NFS4ERR_OLD_STATEID:
2145 if (ret == 0)
2146 exception->retry = 1;
2147 }
2148 /* We failed to handle the error */
2149 return nfs4_map_errors(ret);
2150 }
2151
2152 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2153 {
2154 static nfs4_verifier sc_verifier;
2155 static int initialized;
2156
2157 struct nfs4_setclientid setclientid = {
2158 .sc_verifier = &sc_verifier,
2159 .sc_prog = program,
2160 };
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2163 .rpc_argp = &setclientid,
2164 .rpc_resp = clp,
2165 .rpc_cred = clp->cl_cred,
2166 };
2167
2168 if (!initialized) {
2169 struct timespec boot_time;
2170 u32 *p;
2171
2172 initialized = 1;
2173 boot_time = CURRENT_TIME;
2174 p = (u32*)sc_verifier.data;
2175 *p++ = htonl((u32)boot_time.tv_sec);
2176 *p = htonl((u32)boot_time.tv_nsec);
2177 }
2178 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2179 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u",
2180 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr));
2181 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2182 sizeof(setclientid.sc_netid), "tcp");
2183 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2184 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2185 clp->cl_ipaddr, port >> 8, port & 255);
2186
2187 return rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2188 }
2189
2190 int
2191 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2192 {
2193 struct nfs_fsinfo fsinfo;
2194 struct rpc_message msg = {
2195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2196 .rpc_argp = clp,
2197 .rpc_resp = &fsinfo,
2198 .rpc_cred = clp->cl_cred,
2199 };
2200 unsigned long now;
2201 int status;
2202
2203 now = jiffies;
2204 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2205 if (status == 0) {
2206 spin_lock(&clp->cl_lock);
2207 clp->cl_lease_time = fsinfo.lease_time * HZ;
2208 clp->cl_last_renewal = now;
2209 spin_unlock(&clp->cl_lock);
2210 }
2211 return status;
2212 }
2213
2214 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2215 {
2216 struct nfs4_delegreturnargs args = {
2217 .fhandle = NFS_FH(inode),
2218 .stateid = stateid,
2219 };
2220 struct rpc_message msg = {
2221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2222 .rpc_argp = &args,
2223 .rpc_cred = cred,
2224 };
2225
2226 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2227 }
2228
2229 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2230 {
2231 struct nfs_server *server = NFS_SERVER(inode);
2232 struct nfs4_exception exception = { };
2233 int err;
2234 do {
2235 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2236 switch (err) {
2237 case -NFS4ERR_STALE_STATEID:
2238 case -NFS4ERR_EXPIRED:
2239 nfs4_schedule_state_recovery(server->nfs4_state);
2240 case 0:
2241 return 0;
2242 }
2243 err = nfs4_handle_exception(server, err, &exception);
2244 } while (exception.retry);
2245 return err;
2246 }
2247
2248 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2249 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2250
2251 /*
2252 * sleep, with exponential backoff, and retry the LOCK operation.
2253 */
2254 static unsigned long
2255 nfs4_set_lock_task_retry(unsigned long timeout)
2256 {
2257 current->state = TASK_INTERRUPTIBLE;
2258 schedule_timeout(timeout);
2259 timeout <<= 1;
2260 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2261 return NFS4_LOCK_MAXTIMEOUT;
2262 return timeout;
2263 }
2264
2265 static inline int
2266 nfs4_lck_type(int cmd, struct file_lock *request)
2267 {
2268 /* set lock type */
2269 switch (request->fl_type) {
2270 case F_RDLCK:
2271 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2272 case F_WRLCK:
2273 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2274 case F_UNLCK:
2275 return NFS4_WRITE_LT;
2276 }
2277 BUG();
2278 return 0;
2279 }
2280
2281 static inline uint64_t
2282 nfs4_lck_length(struct file_lock *request)
2283 {
2284 if (request->fl_end == OFFSET_MAX)
2285 return ~(uint64_t)0;
2286 return request->fl_end - request->fl_start + 1;
2287 }
2288
2289 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2290 {
2291 struct inode *inode = state->inode;
2292 struct nfs_server *server = NFS_SERVER(inode);
2293 struct nfs4_client *clp = server->nfs4_state;
2294 struct nfs_lockargs arg = {
2295 .fh = NFS_FH(inode),
2296 .type = nfs4_lck_type(cmd, request),
2297 .offset = request->fl_start,
2298 .length = nfs4_lck_length(request),
2299 };
2300 struct nfs_lockres res = {
2301 .server = server,
2302 };
2303 struct rpc_message msg = {
2304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2305 .rpc_argp = &arg,
2306 .rpc_resp = &res,
2307 .rpc_cred = state->owner->so_cred,
2308 };
2309 struct nfs_lowner nlo;
2310 struct nfs4_lock_state *lsp;
2311 int status;
2312
2313 down_read(&clp->cl_sem);
2314 nlo.clientid = clp->cl_clientid;
2315 down(&state->lock_sema);
2316 lsp = nfs4_find_lock_state(state, request->fl_owner);
2317 if (lsp)
2318 nlo.id = lsp->ls_id;
2319 else {
2320 spin_lock(&clp->cl_lock);
2321 nlo.id = nfs4_alloc_lockowner_id(clp);
2322 spin_unlock(&clp->cl_lock);
2323 }
2324 arg.u.lockt = &nlo;
2325 status = rpc_call_sync(server->client, &msg, 0);
2326 if (!status) {
2327 request->fl_type = F_UNLCK;
2328 } else if (status == -NFS4ERR_DENIED) {
2329 int64_t len, start, end;
2330 start = res.u.denied.offset;
2331 len = res.u.denied.length;
2332 end = start + len - 1;
2333 if (end < 0 || len == 0)
2334 request->fl_end = OFFSET_MAX;
2335 else
2336 request->fl_end = (loff_t)end;
2337 request->fl_start = (loff_t)start;
2338 request->fl_type = F_WRLCK;
2339 if (res.u.denied.type & 1)
2340 request->fl_type = F_RDLCK;
2341 request->fl_pid = 0;
2342 status = 0;
2343 }
2344 if (lsp)
2345 nfs4_put_lock_state(lsp);
2346 up(&state->lock_sema);
2347 up_read(&clp->cl_sem);
2348 return status;
2349 }
2350
2351 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2352 {
2353 struct nfs4_exception exception = { };
2354 int err;
2355
2356 do {
2357 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2358 _nfs4_proc_getlk(state, cmd, request),
2359 &exception);
2360 } while (exception.retry);
2361 return err;
2362 }
2363
2364 static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2365 {
2366 struct inode *inode = state->inode;
2367 struct nfs_server *server = NFS_SERVER(inode);
2368 struct nfs4_client *clp = server->nfs4_state;
2369 struct nfs_lockargs arg = {
2370 .fh = NFS_FH(inode),
2371 .type = nfs4_lck_type(cmd, request),
2372 .offset = request->fl_start,
2373 .length = nfs4_lck_length(request),
2374 };
2375 struct nfs_lockres res = {
2376 .server = server,
2377 };
2378 struct rpc_message msg = {
2379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2380 .rpc_argp = &arg,
2381 .rpc_resp = &res,
2382 .rpc_cred = state->owner->so_cred,
2383 };
2384 struct nfs4_lock_state *lsp;
2385 struct nfs_locku_opargs luargs;
2386 int status = 0;
2387
2388 down_read(&clp->cl_sem);
2389 down(&state->lock_sema);
2390 lsp = nfs4_find_lock_state(state, request->fl_owner);
2391 if (!lsp)
2392 goto out;
2393 /* We might have lost the locks! */
2394 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0) {
2395 luargs.seqid = lsp->ls_seqid;
2396 memcpy(&luargs.stateid, &lsp->ls_stateid, sizeof(luargs.stateid));
2397 arg.u.locku = &luargs;
2398 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2399 nfs4_increment_lock_seqid(status, lsp);
2400 }
2401
2402 if (status == 0) {
2403 memcpy(&lsp->ls_stateid, &res.u.stateid,
2404 sizeof(lsp->ls_stateid));
2405 nfs4_notify_unlck(state, request, lsp);
2406 }
2407 nfs4_put_lock_state(lsp);
2408 out:
2409 up(&state->lock_sema);
2410 if (status == 0)
2411 posix_lock_file(request->fl_file, request);
2412 up_read(&clp->cl_sem);
2413 return status;
2414 }
2415
2416 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2417 {
2418 struct nfs4_exception exception = { };
2419 int err;
2420
2421 do {
2422 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2423 _nfs4_proc_unlck(state, cmd, request),
2424 &exception);
2425 } while (exception.retry);
2426 return err;
2427 }
2428
2429 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2430 {
2431 struct inode *inode = state->inode;
2432 struct nfs_server *server = NFS_SERVER(inode);
2433 struct nfs4_lock_state *lsp;
2434 struct nfs_lockargs arg = {
2435 .fh = NFS_FH(inode),
2436 .type = nfs4_lck_type(cmd, request),
2437 .offset = request->fl_start,
2438 .length = nfs4_lck_length(request),
2439 };
2440 struct nfs_lockres res = {
2441 .server = server,
2442 };
2443 struct rpc_message msg = {
2444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2445 .rpc_argp = &arg,
2446 .rpc_resp = &res,
2447 .rpc_cred = state->owner->so_cred,
2448 };
2449 struct nfs_lock_opargs largs = {
2450 .reclaim = reclaim,
2451 .new_lock_owner = 0,
2452 };
2453 int status;
2454
2455 lsp = nfs4_get_lock_state(state, request->fl_owner);
2456 if (lsp == NULL)
2457 return -ENOMEM;
2458 if (!(lsp->ls_flags & NFS_LOCK_INITIALIZED)) {
2459 struct nfs4_state_owner *owner = state->owner;
2460 struct nfs_open_to_lock otl = {
2461 .lock_owner = {
2462 .clientid = server->nfs4_state->cl_clientid,
2463 },
2464 };
2465
2466 otl.lock_seqid = lsp->ls_seqid;
2467 otl.lock_owner.id = lsp->ls_id;
2468 memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid));
2469 largs.u.open_lock = &otl;
2470 largs.new_lock_owner = 1;
2471 arg.u.lock = &largs;
2472 down(&owner->so_sema);
2473 otl.open_seqid = owner->so_seqid;
2474 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2475 /* increment open_owner seqid on success, and
2476 * seqid mutating errors */
2477 nfs4_increment_seqid(status, owner);
2478 up(&owner->so_sema);
2479 } else {
2480 struct nfs_exist_lock el = {
2481 .seqid = lsp->ls_seqid,
2482 };
2483 memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid));
2484 largs.u.exist_lock = ⪙
2485 largs.new_lock_owner = 0;
2486 arg.u.lock = &largs;
2487 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2488 }
2489 /* increment seqid on success, and * seqid mutating errors*/
2490 nfs4_increment_lock_seqid(status, lsp);
2491 /* save the returned stateid. */
2492 if (status == 0) {
2493 memcpy(&lsp->ls_stateid, &res.u.stateid, sizeof(nfs4_stateid));
2494 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2495 if (!reclaim)
2496 nfs4_notify_setlk(state, request, lsp);
2497 } else if (status == -NFS4ERR_DENIED)
2498 status = -EAGAIN;
2499 nfs4_put_lock_state(lsp);
2500 return status;
2501 }
2502
2503 int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2504 {
2505 return _nfs4_do_setlk(state, F_SETLK, request, 1);
2506 }
2507
2508 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2509 {
2510 struct nfs4_client *clp = state->owner->so_client;
2511 int status;
2512
2513 down_read(&clp->cl_sem);
2514 down(&state->lock_sema);
2515 status = _nfs4_do_setlk(state, cmd, request, 0);
2516 up(&state->lock_sema);
2517 if (status == 0) {
2518 /* Note: we always want to sleep here! */
2519 request->fl_flags |= FL_SLEEP;
2520 if (posix_lock_file_wait(request->fl_file, request) < 0)
2521 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
2522 }
2523 up_read(&clp->cl_sem);
2524 return status;
2525 }
2526
2527 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2528 {
2529 struct nfs4_exception exception = { };
2530 int err;
2531
2532 do {
2533 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2534 _nfs4_proc_setlk(state, cmd, request),
2535 &exception);
2536 } while (exception.retry);
2537 return err;
2538 }
2539
2540 static int
2541 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
2542 {
2543 struct nfs_open_context *ctx;
2544 struct nfs4_state *state;
2545 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
2546 int status;
2547
2548 /* verify open state */
2549 ctx = (struct nfs_open_context *)filp->private_data;
2550 state = ctx->state;
2551
2552 if (request->fl_start < 0 || request->fl_end < 0)
2553 return -EINVAL;
2554
2555 if (IS_GETLK(cmd))
2556 return nfs4_proc_getlk(state, F_GETLK, request);
2557
2558 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
2559 return -EINVAL;
2560
2561 if (request->fl_type == F_UNLCK)
2562 return nfs4_proc_unlck(state, cmd, request);
2563
2564 do {
2565 status = nfs4_proc_setlk(state, cmd, request);
2566 if ((status != -EAGAIN) || IS_SETLK(cmd))
2567 break;
2568 timeout = nfs4_set_lock_task_retry(timeout);
2569 status = -ERESTARTSYS;
2570 if (signalled())
2571 break;
2572 } while(status < 0);
2573
2574 return status;
2575 }
2576
2577 struct nfs_rpc_ops nfs_v4_clientops = {
2578 .version = 4, /* protocol version */
2579 .dentry_ops = &nfs4_dentry_operations,
2580 .dir_inode_ops = &nfs4_dir_inode_operations,
2581 .getroot = nfs4_proc_get_root,
2582 .getattr = nfs4_proc_getattr,
2583 .setattr = nfs4_proc_setattr,
2584 .lookup = nfs4_proc_lookup,
2585 .access = nfs4_proc_access,
2586 .readlink = nfs4_proc_readlink,
2587 .read = nfs4_proc_read,
2588 .write = nfs4_proc_write,
2589 .commit = nfs4_proc_commit,
2590 .create = nfs4_proc_create,
2591 .remove = nfs4_proc_remove,
2592 .unlink_setup = nfs4_proc_unlink_setup,
2593 .unlink_done = nfs4_proc_unlink_done,
2594 .rename = nfs4_proc_rename,
2595 .link = nfs4_proc_link,
2596 .symlink = nfs4_proc_symlink,
2597 .mkdir = nfs4_proc_mkdir,
2598 .rmdir = nfs4_proc_remove,
2599 .readdir = nfs4_proc_readdir,
2600 .mknod = nfs4_proc_mknod,
2601 .statfs = nfs4_proc_statfs,
2602 .fsinfo = nfs4_proc_fsinfo,
2603 .pathconf = nfs4_proc_pathconf,
2604 .decode_dirent = nfs4_decode_dirent,
2605 .read_setup = nfs4_proc_read_setup,
2606 .write_setup = nfs4_proc_write_setup,
2607 .commit_setup = nfs4_proc_commit_setup,
2608 .file_open = nfs4_proc_file_open,
2609 .file_release = nfs4_proc_file_release,
2610 .lock = nfs4_proc_lock,
2611 };
2612
2613 /*
2614 * Local variables:
2615 * c-basic-offset: 8
2616 * End:
2617 */
2618
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