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NFSv4: Fix a potential CLOSE race
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 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/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
50
4ce79717 51#include "nfs4_fs.h"
1da177e4
LT		 52#include "delegation.h"
53
54#define NFSDBG_FACILITY NFSDBG_PROC
55
56#define NFS4_POLL_RETRY_MIN (1*HZ)
57#define NFS4_POLL_RETRY_MAX (15*HZ)
58
59static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
60static int nfs4_async_handle_error(struct rpc_task *, struct nfs_server *);
61static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
62static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
63extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
64extern struct rpc_procinfo nfs4_procedures[];
65
1da177e4
LT		 66/* Prevent leaks of NFSv4 errors into userland */
67int nfs4_map_errors(int err)
68{
69 if (err < -1000) {
70 dprintk("%s could not handle NFSv4 error %d\n",
71 __FUNCTION__, -err);
72 return -EIO;
73 }
74 return err;
75}
76
77/*
78 * This is our standard bitmap for GETATTR requests.
79 */
80const u32 nfs4_fattr_bitmap[2] = {
81 FATTR4_WORD0_TYPE
82 | FATTR4_WORD0_CHANGE
83 | FATTR4_WORD0_SIZE
84 | FATTR4_WORD0_FSID
85 | FATTR4_WORD0_FILEID,
86 FATTR4_WORD1_MODE
87 | FATTR4_WORD1_NUMLINKS
88 | FATTR4_WORD1_OWNER
89 | FATTR4_WORD1_OWNER_GROUP
90 | FATTR4_WORD1_RAWDEV
91 | FATTR4_WORD1_SPACE_USED
92 | FATTR4_WORD1_TIME_ACCESS
93 | FATTR4_WORD1_TIME_METADATA
94 | FATTR4_WORD1_TIME_MODIFY
95};
96
97const u32 nfs4_statfs_bitmap[2] = {
98 FATTR4_WORD0_FILES_AVAIL
99 | FATTR4_WORD0_FILES_FREE
100 | FATTR4_WORD0_FILES_TOTAL,
101 FATTR4_WORD1_SPACE_AVAIL
102 | FATTR4_WORD1_SPACE_FREE
103 | FATTR4_WORD1_SPACE_TOTAL
104};
105
4ce79717 106const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 107 FATTR4_WORD0_MAXLINK
108 | FATTR4_WORD0_MAXNAME,
109 0
110};
111
112const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
113 | FATTR4_WORD0_MAXREAD
114 | FATTR4_WORD0_MAXWRITE
115 | FATTR4_WORD0_LEASE_TIME,
116 0
117};
118
119static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
120 struct nfs4_readdir_arg *readdir)
121{
122 u32 *start, *p;
123
124 BUG_ON(readdir->count < 80);
125 if (cookie > 2) {
b7ef1956 126 readdir->cookie = cookie;
1da177e4
LT		 127 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
128 return;
129 }
130
131 readdir->cookie = 0;
132 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
133 if (cookie == 2)
134 return;
135
136 /*
137 * NFSv4 servers do not return entries for '.' and '..'
138 * Therefore, we fake these entries here. We let '.'
139 * have cookie 0 and '..' have cookie 1. Note that
140 * when talking to the server, we always send cookie 0
141 * instead of 1 or 2.
142 */
143 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
144
145 if (cookie == 0) {
146 *p++ = xdr_one; /* next */
147 *p++ = xdr_zero; /* cookie, first word */
148 *p++ = xdr_one; /* cookie, second word */
149 *p++ = xdr_one; /* entry len */
150 memcpy(p, ".\0\0\0", 4); /* entry */
151 p++;
152 *p++ = xdr_one; /* bitmap length */
153 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
154 *p++ = htonl(8); /* attribute buffer length */
155 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
156 }
157
158 *p++ = xdr_one; /* next */
159 *p++ = xdr_zero; /* cookie, first word */
160 *p++ = xdr_two; /* cookie, second word */
161 *p++ = xdr_two; /* entry len */
162 memcpy(p, "..\0\0", 4); /* entry */
163 p++;
164 *p++ = xdr_one; /* bitmap length */
165 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
166 *p++ = htonl(8); /* attribute buffer length */
167 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
168
169 readdir->pgbase = (char *)p - (char *)start;
170 readdir->count -= readdir->pgbase;
171 kunmap_atomic(start, KM_USER0);
172}
173
174static void
175renew_lease(struct nfs_server *server, unsigned long timestamp)
176{
177 struct nfs4_client *clp = server->nfs4_state;
178 spin_lock(&clp->cl_lock);
179 if (time_before(clp->cl_last_renewal,timestamp))
180 clp->cl_last_renewal = timestamp;
181 spin_unlock(&clp->cl_lock);
182}
183
184static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
185{
186 struct nfs_inode *nfsi = NFS_I(inode);
187
188 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
189 nfsi->change_attr = cinfo->after;
190}
191
9512135d
TM		 192/* Helper for asynchronous RPC calls */
193static int nfs4_call_async(struct rpc_clnt *clnt, rpc_action tk_begin,
194 rpc_action tk_exit, void *calldata)
195{
196 struct rpc_task *task;
197
198 if (!(task = rpc_new_task(clnt, tk_exit, RPC_TASK_ASYNC)))
199 return -ENOMEM;
200
201 task->tk_calldata = calldata;
202 task->tk_action = tk_begin;
203 rpc_execute(task);
204 return 0;
205}
206
1da177e4
LT		 207static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
208{
209 struct inode *inode = state->inode;
210
211 open_flags &= (FMODE_READ|FMODE_WRITE);
212 /* Protect against nfs4_find_state() */
213 spin_lock(&inode->i_lock);
214 state->state |= open_flags;
215 /* NB! List reordering - see the reclaim code for why. */
216 if ((open_flags & FMODE_WRITE) && 0 == state->nwriters++)
217 list_move(&state->open_states, &state->owner->so_states);
218 if (open_flags & FMODE_READ)
219 state->nreaders++;
220 memcpy(&state->stateid, stateid, sizeof(state->stateid));
221 spin_unlock(&inode->i_lock);
222}
223
224/*
225 * OPEN_RECLAIM:
226 * reclaim state on the server after a reboot.
227 * Assumes caller is holding the sp->so_sem
228 */
229static int _nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
230{
231 struct inode *inode = state->inode;
232 struct nfs_server *server = NFS_SERVER(inode);
233 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
234 struct nfs_openargs o_arg = {
235 .fh = NFS_FH(inode),
1da177e4
LT		 236 .id = sp->so_id,
237 .open_flags = state->state,
238 .clientid = server->nfs4_state->cl_clientid,
239 .claim = NFS4_OPEN_CLAIM_PREVIOUS,
240 .bitmask = server->attr_bitmask,
241 };
242 struct nfs_openres o_res = {
243 .server = server, /* Grrr */
244 };
245 struct rpc_message msg = {
246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
247 .rpc_argp = &o_arg,
248 .rpc_resp = &o_res,
249 .rpc_cred = sp->so_cred,
250 };
251 int status;
252
253 if (delegation != NULL) {
254 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
255 memcpy(&state->stateid, &delegation->stateid,
256 sizeof(state->stateid));
257 set_bit(NFS_DELEGATED_STATE, &state->flags);
258 return 0;
259 }
260 o_arg.u.delegation_type = delegation->type;
261 }
cee54fc9
TM		 262 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (o_arg.seqid == NULL)
264 return -ENOMEM;
1da177e4 265 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
cee54fc9
TM		 266 /* Confirm the sequence as being established */
267 nfs_confirm_seqid(&sp->so_seqid, status);
268 nfs_increment_open_seqid(status, o_arg.seqid);
1da177e4
LT		 269 if (status == 0) {
270 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
271 if (o_res.delegation_type != 0) {
272 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
273 /* Did the server issue an immediate delegation recall? */
274 if (o_res.do_recall)
275 nfs_async_inode_return_delegation(inode, &o_res.stateid);
276 }
277 }
cee54fc9 278 nfs_free_seqid(o_arg.seqid);
1da177e4
LT		 279 clear_bit(NFS_DELEGATED_STATE, &state->flags);
280 /* Ensure we update the inode attributes */
281 NFS_CACHEINV(inode);
282 return status;
283}
284
285static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
286{
287 struct nfs_server *server = NFS_SERVER(state->inode);
288 struct nfs4_exception exception = { };
289 int err;
290 do {
291 err = _nfs4_open_reclaim(sp, state);
202b50dc
TM		 292 if (err != -NFS4ERR_DELAY)
293 break;
294 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 295 } while (exception.retry);
296 return err;
297}
298
299static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
300{
301 struct nfs4_state_owner *sp = state->owner;
302 struct inode *inode = dentry->d_inode;
303 struct nfs_server *server = NFS_SERVER(inode);
304 struct dentry *parent = dget_parent(dentry);
305 struct nfs_openargs arg = {
306 .fh = NFS_FH(parent->d_inode),
307 .clientid = server->nfs4_state->cl_clientid,
308 .name = &dentry->d_name,
309 .id = sp->so_id,
310 .server = server,
311 .bitmask = server->attr_bitmask,
312 .claim = NFS4_OPEN_CLAIM_DELEGATE_CUR,
313 };
314 struct nfs_openres res = {
315 .server = server,
316 };
317 struct rpc_message msg = {
318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR],
319 .rpc_argp = &arg,
320 .rpc_resp = &res,
321 .rpc_cred = sp->so_cred,
322 };
323 int status = 0;
324
325 down(&sp->so_sema);
326 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
327 goto out;
328 if (state->state == 0)
329 goto out;
cee54fc9
TM		 330 arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
331 status = -ENOMEM;
332 if (arg.seqid == NULL)
333 goto out;
1da177e4
LT		 334 arg.open_flags = state->state;
335 memcpy(arg.u.delegation.data, state->stateid.data, sizeof(arg.u.delegation.data));
336 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
cee54fc9 337 nfs_increment_open_seqid(status, arg.seqid);
1da177e4
LT		 338 if (status >= 0) {
339 memcpy(state->stateid.data, res.stateid.data,
340 sizeof(state->stateid.data));
341 clear_bit(NFS_DELEGATED_STATE, &state->flags);
342 }
cee54fc9 343 nfs_free_seqid(arg.seqid);
1da177e4
LT		 344out:
345 up(&sp->so_sema);
346 dput(parent);
347 return status;
348}
349
350int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
351{
352 struct nfs4_exception exception = { };
353 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
354 int err;
355 do {
356 err = _nfs4_open_delegation_recall(dentry, state);
357 switch (err) {
358 case 0:
359 return err;
360 case -NFS4ERR_STALE_CLIENTID:
361 case -NFS4ERR_STALE_STATEID:
362 case -NFS4ERR_EXPIRED:
363 /* Don't recall a delegation if it was lost */
364 nfs4_schedule_state_recovery(server->nfs4_state);
365 return err;
366 }
367 err = nfs4_handle_exception(server, err, &exception);
368 } while (exception.retry);
369 return err;
370}
371
cee54fc9 372static inline int _nfs4_proc_open_confirm(struct rpc_clnt *clnt, const struct nfs_fh *fh, struct nfs4_state_owner *sp, nfs4_stateid *stateid, struct nfs_seqid *seqid)
1da177e4
LT		 373{
374 struct nfs_open_confirmargs arg = {
375 .fh = fh,
cee54fc9 376 .seqid = seqid,
1da177e4
LT		 377 .stateid = *stateid,
378 };
379 struct nfs_open_confirmres res;
380 struct rpc_message msg = {
381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
382 .rpc_argp = &arg,
383 .rpc_resp = &res,
384 .rpc_cred = sp->so_cred,
385 };
386 int status;
387
388 status = rpc_call_sync(clnt, &msg, RPC_TASK_NOINTR);
cee54fc9
TM		 389 /* Confirm the sequence as being established */
390 nfs_confirm_seqid(&sp->so_seqid, status);
391 nfs_increment_open_seqid(status, seqid);
1da177e4
LT		 392 if (status >= 0)
393 memcpy(stateid, &res.stateid, sizeof(*stateid));
394 return status;
395}
396
397static int _nfs4_proc_open(struct inode *dir, struct nfs4_state_owner *sp, struct nfs_openargs *o_arg, struct nfs_openres *o_res)
398{
399 struct nfs_server *server = NFS_SERVER(dir);
400 struct rpc_message msg = {
401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
402 .rpc_argp = o_arg,
403 .rpc_resp = o_res,
404 .rpc_cred = sp->so_cred,
405 };
406 int status;
407
408 /* Update sequence id. The caller must serialize! */
1da177e4
LT		 409 o_arg->id = sp->so_id;
410 o_arg->clientid = sp->so_client->cl_clientid;
411
412 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
cee54fc9 413 nfs_increment_open_seqid(status, o_arg->seqid);
1da177e4
LT		 414 if (status != 0)
415 goto out;
416 update_changeattr(dir, &o_res->cinfo);
417 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
418 status = _nfs4_proc_open_confirm(server->client, &o_res->fh,
cee54fc9 419 sp, &o_res->stateid, o_arg->seqid);
1da177e4
LT		 420 if (status != 0)
421 goto out;
422 }
cee54fc9 423 nfs_confirm_seqid(&sp->so_seqid, 0);
1da177e4
LT		 424 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
425 status = server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
426out:
427 return status;
428}
429
430static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
431{
432 struct nfs_access_entry cache;
433 int mask = 0;
434 int status;
435
436 if (openflags & FMODE_READ)
437 mask |= MAY_READ;
438 if (openflags & FMODE_WRITE)
439 mask |= MAY_WRITE;
440 status = nfs_access_get_cached(inode, cred, &cache);
441 if (status == 0)
442 goto out;
443
444 /* Be clever: ask server to check for all possible rights */
445 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
446 cache.cred = cred;
447 cache.jiffies = jiffies;
448 status = _nfs4_proc_access(inode, &cache);
449 if (status != 0)
450 return status;
451 nfs_access_add_cache(inode, &cache);
452out:
453 if ((cache.mask & mask) == mask)
454 return 0;
455 return -EACCES;
456}
457
458/*
459 * OPEN_EXPIRED:
460 * reclaim state on the server after a network partition.
461 * Assumes caller holds the appropriate lock
462 */
463static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
464{
465 struct dentry *parent = dget_parent(dentry);
466 struct inode *dir = parent->d_inode;
467 struct inode *inode = state->inode;
468 struct nfs_server *server = NFS_SERVER(dir);
469 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
470 struct nfs_fattr f_attr = {
471 .valid = 0,
472 };
473 struct nfs_openargs o_arg = {
474 .fh = NFS_FH(dir),
475 .open_flags = state->state,
476 .name = &dentry->d_name,
477 .bitmask = server->attr_bitmask,
478 .claim = NFS4_OPEN_CLAIM_NULL,
479 };
480 struct nfs_openres o_res = {
481 .f_attr = &f_attr,
482 .server = server,
483 };
484 int status = 0;
485
486 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
487 status = _nfs4_do_access(inode, sp->so_cred, state->state);
488 if (status < 0)
489 goto out;
490 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
491 set_bit(NFS_DELEGATED_STATE, &state->flags);
492 goto out;
493 }
cee54fc9
TM		 494 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
495 status = -ENOMEM;
496 if (o_arg.seqid == NULL)
497 goto out;
1da177e4
LT		 498 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
499 if (status != 0)
500 goto out_nodeleg;
501 /* Check if files differ */
502 if ((f_attr.mode & S_IFMT) != (inode->i_mode & S_IFMT))
503 goto out_stale;
504 /* Has the file handle changed? */
505 if (nfs_compare_fh(&o_res.fh, NFS_FH(inode)) != 0) {
506 /* Verify if the change attributes are the same */
507 if (f_attr.change_attr != NFS_I(inode)->change_attr)
508 goto out_stale;
509 if (nfs_size_to_loff_t(f_attr.size) != inode->i_size)
510 goto out_stale;
511 /* Lets just pretend that this is the same file */
512 nfs_copy_fh(NFS_FH(inode), &o_res.fh);
513 NFS_I(inode)->fileid = f_attr.fileid;
514 }
515 memcpy(&state->stateid, &o_res.stateid, sizeof(state->stateid));
516 if (o_res.delegation_type != 0) {
517 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM))
518 nfs_inode_set_delegation(inode, sp->so_cred, &o_res);
519 else
520 nfs_inode_reclaim_delegation(inode, sp->so_cred, &o_res);
521 }
522out_nodeleg:
cee54fc9 523 nfs_free_seqid(o_arg.seqid);
1da177e4
LT		 524 clear_bit(NFS_DELEGATED_STATE, &state->flags);
525out:
526 dput(parent);
527 return status;
528out_stale:
529 status = -ESTALE;
530 /* Invalidate the state owner so we don't ever use it again */
531 nfs4_drop_state_owner(sp);
532 d_drop(dentry);
533 /* Should we be trying to close that stateid? */
534 goto out_nodeleg;
535}
536
202b50dc
TM		 537static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
538{
539 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
540 struct nfs4_exception exception = { };
541 int err;
542
543 do {
544 err = _nfs4_open_expired(sp, state, dentry);
545 if (err == -NFS4ERR_DELAY)
546 nfs4_handle_exception(server, err, &exception);
547 } while (exception.retry);
548 return err;
549}
550
1da177e4
LT		 551static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
552{
553 struct nfs_inode *nfsi = NFS_I(state->inode);
554 struct nfs_open_context *ctx;
555 int status;
556
557 spin_lock(&state->inode->i_lock);
558 list_for_each_entry(ctx, &nfsi->open_files, list) {
559 if (ctx->state != state)
560 continue;
561 get_nfs_open_context(ctx);
562 spin_unlock(&state->inode->i_lock);
202b50dc 563 status = nfs4_do_open_expired(sp, state, ctx->dentry);
1da177e4
LT		 564 put_nfs_open_context(ctx);
565 return status;
566 }
567 spin_unlock(&state->inode->i_lock);
568 return -ENOENT;
569}
570
571/*
572 * Returns an nfs4_state + an extra reference to the inode
573 */
574static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
575{
576 struct nfs_delegation *delegation;
577 struct nfs_server *server = NFS_SERVER(inode);
578 struct nfs4_client *clp = server->nfs4_state;
579 struct nfs_inode *nfsi = NFS_I(inode);
580 struct nfs4_state_owner *sp = NULL;
581 struct nfs4_state *state = NULL;
582 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
583 int err;
584
585 /* Protect against reboot recovery - NOTE ORDER! */
586 down_read(&clp->cl_sem);
587 /* Protect against delegation recall */
588 down_read(&nfsi->rwsem);
589 delegation = NFS_I(inode)->delegation;
590 err = -ENOENT;
591 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
592 goto out_err;
593 err = -ENOMEM;
594 if (!(sp = nfs4_get_state_owner(server, cred))) {
595 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
596 goto out_err;
597 }
598 down(&sp->so_sema);
599 state = nfs4_get_open_state(inode, sp);
600 if (state == NULL)
601 goto out_err;
602
603 err = -ENOENT;
604 if ((state->state & open_flags) == open_flags) {
605 spin_lock(&inode->i_lock);
606 if (open_flags & FMODE_READ)
607 state->nreaders++;
608 if (open_flags & FMODE_WRITE)
609 state->nwriters++;
610 spin_unlock(&inode->i_lock);
611 goto out_ok;
612 } else if (state->state != 0)
613 goto out_err;
614
615 lock_kernel();
616 err = _nfs4_do_access(inode, cred, open_flags);
617 unlock_kernel();
618 if (err != 0)
619 goto out_err;
620 set_bit(NFS_DELEGATED_STATE, &state->flags);
621 update_open_stateid(state, &delegation->stateid, open_flags);
622out_ok:
623 up(&sp->so_sema);
624 nfs4_put_state_owner(sp);
625 up_read(&nfsi->rwsem);
626 up_read(&clp->cl_sem);
627 igrab(inode);
628 *res = state;
629 return 0;
630out_err:
631 if (sp != NULL) {
632 if (state != NULL)
633 nfs4_put_open_state(state);
634 up(&sp->so_sema);
635 nfs4_put_state_owner(sp);
636 }
637 up_read(&nfsi->rwsem);
638 up_read(&clp->cl_sem);
639 return err;
640}
641
642static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
643{
644 struct nfs4_exception exception = { };
645 struct nfs4_state *res;
646 int err;
647
648 do {
649 err = _nfs4_open_delegated(inode, flags, cred, &res);
650 if (err == 0)
651 break;
652 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
653 err, &exception));
654 } while (exception.retry);
655 return res;
656}
657
658/*
659 * Returns an nfs4_state + an referenced inode
660 */
661static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
662{
663 struct nfs4_state_owner *sp;
664 struct nfs4_state *state = NULL;
665 struct nfs_server *server = NFS_SERVER(dir);
666 struct nfs4_client *clp = server->nfs4_state;
667 struct inode *inode = NULL;
668 int status;
669 struct nfs_fattr f_attr = {
670 .valid = 0,
671 };
672 struct nfs_openargs o_arg = {
673 .fh = NFS_FH(dir),
674 .open_flags = flags,
675 .name = &dentry->d_name,
676 .server = server,
677 .bitmask = server->attr_bitmask,
678 .claim = NFS4_OPEN_CLAIM_NULL,
679 };
680 struct nfs_openres o_res = {
681 .f_attr = &f_attr,
682 .server = server,
683 };
684
685 /* Protect against reboot recovery conflicts */
686 down_read(&clp->cl_sem);
687 status = -ENOMEM;
688 if (!(sp = nfs4_get_state_owner(server, cred))) {
689 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
690 goto out_err;
691 }
692 if (flags & O_EXCL) {
693 u32 *p = (u32 *) o_arg.u.verifier.data;
694 p[0] = jiffies;
695 p[1] = current->pid;
696 } else
697 o_arg.u.attrs = sattr;
698 /* Serialization for the sequence id */
699 down(&sp->so_sema);
700
cee54fc9
TM		 701 o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
702 if (o_arg.seqid == NULL)
703 return -ENOMEM;
1da177e4
LT		 704 status = _nfs4_proc_open(dir, sp, &o_arg, &o_res);
705 if (status != 0)
706 goto out_err;
707
708 status = -ENOMEM;
709 inode = nfs_fhget(dir->i_sb, &o_res.fh, &f_attr);
710 if (!inode)
711 goto out_err;
712 state = nfs4_get_open_state(inode, sp);
713 if (!state)
714 goto out_err;
715 update_open_stateid(state, &o_res.stateid, flags);
716 if (o_res.delegation_type != 0)
717 nfs_inode_set_delegation(inode, cred, &o_res);
cee54fc9 718 nfs_free_seqid(o_arg.seqid);
1da177e4
LT		 719 up(&sp->so_sema);
720 nfs4_put_state_owner(sp);
721 up_read(&clp->cl_sem);
722 *res = state;
723 return 0;
724out_err:
725 if (sp != NULL) {
726 if (state != NULL)
727 nfs4_put_open_state(state);
cee54fc9 728 nfs_free_seqid(o_arg.seqid);
1da177e4
LT		 729 up(&sp->so_sema);
730 nfs4_put_state_owner(sp);
731 }
732 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
733 up_read(&clp->cl_sem);
734 if (inode != NULL)
735 iput(inode);
736 *res = NULL;
737 return status;
738}
739
740
741static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
742{
743 struct nfs4_exception exception = { };
744 struct nfs4_state *res;
745 int status;
746
747 do {
748 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
749 if (status == 0)
750 break;
751 /* NOTE: BAD_SEQID means the server and client disagree about the
752 * book-keeping w.r.t. state-changing operations
753 * (OPEN/CLOSE/LOCK/LOCKU...)
754 * It is actually a sign of a bug on the client or on the server.
755 *
756 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 757 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 758 * have unhashed the old state_owner for us, and that we can
759 * therefore safely retry using a new one. We should still warn
760 * the user though...
761 */
762 if (status == -NFS4ERR_BAD_SEQID) {
763 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
764 exception.retry = 1;
765 continue;
766 }
767 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
768 status, &exception));
769 } while (exception.retry);
770 return res;
771}
772
773static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
774 struct nfs_fh *fhandle, struct iattr *sattr,
775 struct nfs4_state *state)
776{
777 struct nfs_setattrargs arg = {
778 .fh = fhandle,
779 .iap = sattr,
780 .server = server,
781 .bitmask = server->attr_bitmask,
782 };
783 struct nfs_setattrres res = {
784 .fattr = fattr,
785 .server = server,
786 };
787 struct rpc_message msg = {
788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
789 .rpc_argp = &arg,
790 .rpc_resp = &res,
791 };
65e4308d 792 int status;
1da177e4
LT		 793
794 fattr->valid = 0;
795
08e9eac4 796 if (state != NULL) {
1da177e4 797 msg.rpc_cred = state->owner->so_cred;
08e9eac4
TM		 798 nfs4_copy_stateid(&arg.stateid, state, current->files);
799 } else
1da177e4
LT		 800 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
801
65e4308d
TM		 802 status = rpc_call_sync(server->client, &msg, 0);
803 return status;
1da177e4
LT		 804}
805
806static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
807 struct nfs_fh *fhandle, struct iattr *sattr,
808 struct nfs4_state *state)
809{
810 struct nfs4_exception exception = { };
811 int err;
812 do {
813 err = nfs4_handle_exception(server,
814 _nfs4_do_setattr(server, fattr, fhandle, sattr,
815 state),
816 &exception);
817 } while (exception.retry);
818 return err;
819}
820
821struct nfs4_closedata {
822 struct inode *inode;
823 struct nfs4_state *state;
824 struct nfs_closeargs arg;
825 struct nfs_closeres res;
826};
827
9512135d
TM		 828static void nfs4_free_closedata(struct nfs4_closedata *calldata)
829{
830 struct nfs4_state *state = calldata->state;
831 struct nfs4_state_owner *sp = state->owner;
832 struct nfs_server *server = NFS_SERVER(calldata->inode);
833
834 nfs4_put_open_state(calldata->state);
835 nfs_free_seqid(calldata->arg.seqid);
836 up(&sp->so_sema);
837 nfs4_put_state_owner(sp);
838 up_read(&server->nfs4_state->cl_sem);
839 kfree(calldata);
840}
841
1da177e4
LT		 842static void nfs4_close_done(struct rpc_task *task)
843{
844 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
845 struct nfs4_state *state = calldata->state;
1da177e4
LT		 846 struct nfs_server *server = NFS_SERVER(calldata->inode);
847
848 /* hmm. we are done with the inode, and in the process of freeing
849 * the state_owner. we keep this around to process errors
850 */
cee54fc9 851 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1da177e4
LT		 852 switch (task->tk_status) {
853 case 0:
854 memcpy(&state->stateid, &calldata->res.stateid,
855 sizeof(state->stateid));
856 break;
857 case -NFS4ERR_STALE_STATEID:
858 case -NFS4ERR_EXPIRED:
859 state->state = calldata->arg.open_flags;
860 nfs4_schedule_state_recovery(server->nfs4_state);
861 break;
862 default:
863 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
864 rpc_restart_call(task);
865 return;
866 }
867 }
868 state->state = calldata->arg.open_flags;
9512135d 869 nfs4_free_closedata(calldata);
1da177e4
LT		 870}
871
9512135d 872static void nfs4_close_begin(struct rpc_task *task)
1da177e4 873{
9512135d
TM		 874 struct nfs4_closedata *calldata = (struct nfs4_closedata *)task->tk_calldata;
875 struct nfs4_state *state = calldata->state;
1da177e4
LT		 876 struct rpc_message msg = {
877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
878 .rpc_argp = &calldata->arg,
879 .rpc_resp = &calldata->res,
9512135d 880 .rpc_cred = state->owner->so_cred,
1da177e4 881 };
9512135d
TM		 882 int mode = 0;
883 int status;
884
885 status = nfs_wait_on_sequence(calldata->arg.seqid, task);
886 if (status != 0)
887 return;
888 /* Don't reorder reads */
889 smp_rmb();
890 /* Recalculate the new open mode in case someone reopened the file
891 * while we were waiting in line to be scheduled.
892 */
893 if (state->nreaders != 0)
894 mode |= FMODE_READ;
895 if (state->nwriters != 0)
896 mode |= FMODE_WRITE;
897 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
898 state->state = mode;
899 if (mode == state->state) {
900 nfs4_free_closedata(calldata);
901 task->tk_exit = NULL;
902 rpc_exit(task, 0);
903 return;
904 }
905 if (mode != 0)
1da177e4 906 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
9512135d
TM		 907 calldata->arg.open_flags = mode;
908 rpc_call_setup(task, &msg, 0);
1da177e4
LT		 909}
910
911/*
912 * It is possible for data to be read/written from a mem-mapped file
913 * after the sys_close call (which hits the vfs layer as a flush).
914 * This means that we can't safely call nfsv4 close on a file until
915 * the inode is cleared. This in turn means that we are not good
916 * NFSv4 citizens - we do not indicate to the server to update the file's
917 * share state even when we are done with one of the three share
918 * stateid's in the inode.
919 *
920 * NOTE: Caller must be holding the sp->so_owner semaphore!
921 */
922int nfs4_do_close(struct inode *inode, struct nfs4_state *state, mode_t mode)
923{
924 struct nfs4_closedata *calldata;
9512135d 925 int status = -ENOMEM;
1da177e4 926
9512135d 927 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 928 if (calldata == NULL)
9512135d 929 goto out;
1da177e4
LT		 930 calldata->inode = inode;
931 calldata->state = state;
932 calldata->arg.fh = NFS_FH(inode);
9512135d 933 calldata->arg.stateid = &state->stateid;
1da177e4 934 /* Serialization for the sequence id */
cee54fc9 935 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 936 if (calldata->arg.seqid == NULL)
937 goto out_free_calldata;
938
939 status = nfs4_call_async(NFS_SERVER(inode)->client, nfs4_close_begin,
940 nfs4_close_done, calldata);
941 if (status == 0)
942 goto out;
943
944 nfs_free_seqid(calldata->arg.seqid);
945out_free_calldata:
946 kfree(calldata);
947out:
948 return status;
1da177e4
LT		 949}
950
951struct inode *
952nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
953{
954 struct iattr attr;
955 struct rpc_cred *cred;
956 struct nfs4_state *state;
957
958 if (nd->flags & LOOKUP_CREATE) {
959 attr.ia_mode = nd->intent.open.create_mode;
960 attr.ia_valid = ATTR_MODE;
961 if (!IS_POSIXACL(dir))
962 attr.ia_mode &= ~current->fs->umask;
963 } else {
964 attr.ia_valid = 0;
965 BUG_ON(nd->intent.open.flags & O_CREAT);
966 }
967
968 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
969 if (IS_ERR(cred))
970 return (struct inode *)cred;
971 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
972 put_rpccred(cred);
973 if (IS_ERR(state))
974 return (struct inode *)state;
975 return state->inode;
976}
977
978int
979nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags)
980{
981 struct rpc_cred *cred;
982 struct nfs4_state *state;
983 struct inode *inode;
984
985 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
986 if (IS_ERR(cred))
987 return PTR_ERR(cred);
988 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
989 if (IS_ERR(state))
990 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
991 put_rpccred(cred);
992 if (state == ERR_PTR(-ENOENT) && dentry->d_inode == 0)
993 return 1;
994 if (IS_ERR(state))
995 return 0;
996 inode = state->inode;
997 if (inode == dentry->d_inode) {
998 iput(inode);
999 return 1;
1000 }
1001 d_drop(dentry);
1002 nfs4_close_state(state, openflags);
1003 iput(inode);
1004 return 0;
1005}
1006
1007
1008static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1009{
1010 struct nfs4_server_caps_res res = {};
1011 struct rpc_message msg = {
1012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1013 .rpc_argp = fhandle,
1014 .rpc_resp = &res,
1015 };
1016 int status;
1017
1018 status = rpc_call_sync(server->client, &msg, 0);
1019 if (status == 0) {
1020 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1021 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1022 server->caps |= NFS_CAP_ACLS;
1023 if (res.has_links != 0)
1024 server->caps |= NFS_CAP_HARDLINKS;
1025 if (res.has_symlinks != 0)
1026 server->caps |= NFS_CAP_SYMLINKS;
1027 server->acl_bitmask = res.acl_bitmask;
1028 }
1029 return status;
1030}
1031
1032static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1033{
1034 struct nfs4_exception exception = { };
1035 int err;
1036 do {
1037 err = nfs4_handle_exception(server,
1038 _nfs4_server_capabilities(server, fhandle),
1039 &exception);
1040 } while (exception.retry);
1041 return err;
1042}
1043
1044static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1045 struct nfs_fsinfo *info)
1046{
1047 struct nfs_fattr * fattr = info->fattr;
1048 struct nfs4_lookup_root_arg args = {
1049 .bitmask = nfs4_fattr_bitmap,
1050 };
1051 struct nfs4_lookup_res res = {
1052 .server = server,
1053 .fattr = fattr,
1054 .fh = fhandle,
1055 };
1056 struct rpc_message msg = {
1057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1058 .rpc_argp = &args,
1059 .rpc_resp = &res,
1060 };
1061 fattr->valid = 0;
1062 return rpc_call_sync(server->client, &msg, 0);
1063}
1064
1065static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1066 struct nfs_fsinfo *info)
1067{
1068 struct nfs4_exception exception = { };
1069 int err;
1070 do {
1071 err = nfs4_handle_exception(server,
1072 _nfs4_lookup_root(server, fhandle, info),
1073 &exception);
1074 } while (exception.retry);
1075 return err;
1076}
1077
1078static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1079 struct nfs_fsinfo *info)
1080{
1081 struct nfs_fattr * fattr = info->fattr;
1082 unsigned char * p;
1083 struct qstr q;
1084 struct nfs4_lookup_arg args = {
1085 .dir_fh = fhandle,
1086 .name = &q,
1087 .bitmask = nfs4_fattr_bitmap,
1088 };
1089 struct nfs4_lookup_res res = {
1090 .server = server,
1091 .fattr = fattr,
1092 .fh = fhandle,
1093 };
1094 struct rpc_message msg = {
1095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1096 .rpc_argp = &args,
1097 .rpc_resp = &res,
1098 };
1099 int status;
1100
1101 /*
1102 * Now we do a separate LOOKUP for each component of the mount path.
1103 * The LOOKUPs are done separately so that we can conveniently
1104 * catch an ERR_WRONGSEC if it occurs along the way...
1105 */
1106 status = nfs4_lookup_root(server, fhandle, info);
1107 if (status)
1108 goto out;
1109
1110 p = server->mnt_path;
1111 for (;;) {
1112 struct nfs4_exception exception = { };
1113
1114 while (*p == '/')
1115 p++;
1116 if (!*p)
1117 break;
1118 q.name = p;
1119 while (*p && (*p != '/'))
1120 p++;
1121 q.len = p - q.name;
1122
1123 do {
1124 fattr->valid = 0;
1125 status = nfs4_handle_exception(server,
1126 rpc_call_sync(server->client, &msg, 0),
1127 &exception);
1128 } while (exception.retry);
1129 if (status == 0)
1130 continue;
1131 if (status == -ENOENT) {
1132 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1133 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1134 }
1135 break;
1136 }
1137 if (status == 0)
1138 status = nfs4_server_capabilities(server, fhandle);
1139 if (status == 0)
1140 status = nfs4_do_fsinfo(server, fhandle, info);
1141out:
1142 return status;
1143}
1144
1145static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1146{
1147 struct nfs4_getattr_arg args = {
1148 .fh = fhandle,
1149 .bitmask = server->attr_bitmask,
1150 };
1151 struct nfs4_getattr_res res = {
1152 .fattr = fattr,
1153 .server = server,
1154 };
1155 struct rpc_message msg = {
1156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1157 .rpc_argp = &args,
1158 .rpc_resp = &res,
1159 };
1160
1161 fattr->valid = 0;
1162 return rpc_call_sync(server->client, &msg, 0);
1163}
1164
1165static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1166{
1167 struct nfs4_exception exception = { };
1168 int err;
1169 do {
1170 err = nfs4_handle_exception(server,
1171 _nfs4_proc_getattr(server, fhandle, fattr),
1172 &exception);
1173 } while (exception.retry);
1174 return err;
1175}
1176
1177/*
1178 * The file is not closed if it is opened due to the a request to change
1179 * the size of the file. The open call will not be needed once the
1180 * VFS layer lookup-intents are implemented.
1181 *
1182 * Close is called when the inode is destroyed.
1183 * If we haven't opened the file for O_WRONLY, we
1184 * need to in the size_change case to obtain a stateid.
1185 *
1186 * Got race?
1187 * Because OPEN is always done by name in nfsv4, it is
1188 * possible that we opened a different file by the same
1189 * name. We can recognize this race condition, but we
1190 * can't do anything about it besides returning an error.
1191 *
1192 * This will be fixed with VFS changes (lookup-intent).
1193 */
1194static int
1195nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1196 struct iattr *sattr)
1197{
08e9eac4
TM		 1198 struct rpc_cred *cred;
1199 struct inode *inode = dentry->d_inode;
1200 struct nfs4_state *state;
1da177e4
LT		 1201 int status;
1202
1203 fattr->valid = 0;
1204
08e9eac4
TM		 1205 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1206 if (IS_ERR(cred))
1207 return PTR_ERR(cred);
1208 /* Search for an existing WRITE delegation first */
1209 state = nfs4_open_delegated(inode, FMODE_WRITE, cred);
1210 if (!IS_ERR(state)) {
1211 /* NB: nfs4_open_delegated() bumps the inode->i_count */
1212 iput(inode);
1213 } else {
1214 /* Search for an existing open(O_WRITE) stateid */
1da177e4 1215 state = nfs4_find_state(inode, cred, FMODE_WRITE);
1da177e4 1216 }
08e9eac4 1217
1da177e4
LT		 1218 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1219 NFS_FH(inode), sattr, state);
65e4308d
TM		 1220 if (status == 0)
1221 nfs_setattr_update_inode(inode, sattr);
08e9eac4 1222 if (state != NULL)
1da177e4 1223 nfs4_close_state(state, FMODE_WRITE);
08e9eac4 1224 put_rpccred(cred);
1da177e4
LT		 1225 return status;
1226}
1227
1228static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1229 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1230{
1231 int status;
1232 struct nfs_server *server = NFS_SERVER(dir);
1233 struct nfs4_lookup_arg args = {
1234 .bitmask = server->attr_bitmask,
1235 .dir_fh = NFS_FH(dir),
1236 .name = name,
1237 };
1238 struct nfs4_lookup_res res = {
1239 .server = server,
1240 .fattr = fattr,
1241 .fh = fhandle,
1242 };
1243 struct rpc_message msg = {
1244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1245 .rpc_argp = &args,
1246 .rpc_resp = &res,
1247 };
1248
1249 fattr->valid = 0;
1250
1251 dprintk("NFS call lookup %s\n", name->name);
1252 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1253 dprintk("NFS reply lookup: %d\n", status);
1254 return status;
1255}
1256
1257static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1258{
1259 struct nfs4_exception exception = { };
1260 int err;
1261 do {
1262 err = nfs4_handle_exception(NFS_SERVER(dir),
1263 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1264 &exception);
1265 } while (exception.retry);
1266 return err;
1267}
1268
1269static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1270{
1271 struct nfs4_accessargs args = {
1272 .fh = NFS_FH(inode),
1273 };
1274 struct nfs4_accessres res = { 0 };
1275 struct rpc_message msg = {
1276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1277 .rpc_argp = &args,
1278 .rpc_resp = &res,
1279 .rpc_cred = entry->cred,
1280 };
1281 int mode = entry->mask;
1282 int status;
1283
1284 /*
1285 * Determine which access bits we want to ask for...
1286 */
1287 if (mode & MAY_READ)
1288 args.access |= NFS4_ACCESS_READ;
1289 if (S_ISDIR(inode->i_mode)) {
1290 if (mode & MAY_WRITE)
1291 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1292 if (mode & MAY_EXEC)
1293 args.access |= NFS4_ACCESS_LOOKUP;
1294 } else {
1295 if (mode & MAY_WRITE)
1296 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1297 if (mode & MAY_EXEC)
1298 args.access |= NFS4_ACCESS_EXECUTE;
1299 }
1300 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1301 if (!status) {
1302 entry->mask = 0;
1303 if (res.access & NFS4_ACCESS_READ)
1304 entry->mask |= MAY_READ;
1305 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1306 entry->mask |= MAY_WRITE;
1307 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1308 entry->mask |= MAY_EXEC;
1309 }
1310 return status;
1311}
1312
1313static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1314{
1315 struct nfs4_exception exception = { };
1316 int err;
1317 do {
1318 err = nfs4_handle_exception(NFS_SERVER(inode),
1319 _nfs4_proc_access(inode, entry),
1320 &exception);
1321 } while (exception.retry);
1322 return err;
1323}
1324
1325/*
1326 * TODO: For the time being, we don't try to get any attributes
1327 * along with any of the zero-copy operations READ, READDIR,
1328 * READLINK, WRITE.
1329 *
1330 * In the case of the first three, we want to put the GETATTR
1331 * after the read-type operation -- this is because it is hard
1332 * to predict the length of a GETATTR response in v4, and thus
1333 * align the READ data correctly. This means that the GETATTR
1334 * may end up partially falling into the page cache, and we should
1335 * shift it into the 'tail' of the xdr_buf before processing.
1336 * To do this efficiently, we need to know the total length
1337 * of data received, which doesn't seem to be available outside
1338 * of the RPC layer.
1339 *
1340 * In the case of WRITE, we also want to put the GETATTR after
1341 * the operation -- in this case because we want to make sure
1342 * we get the post-operation mtime and size. This means that
1343 * we can't use xdr_encode_pages() as written: we need a variant
1344 * of it which would leave room in the 'tail' iovec.
1345 *
1346 * Both of these changes to the XDR layer would in fact be quite
1347 * minor, but I decided to leave them for a subsequent patch.
1348 */
1349static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1350 unsigned int pgbase, unsigned int pglen)
1351{
1352 struct nfs4_readlink args = {
1353 .fh = NFS_FH(inode),
1354 .pgbase = pgbase,
1355 .pglen = pglen,
1356 .pages = &page,
1357 };
1358 struct rpc_message msg = {
1359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1360 .rpc_argp = &args,
1361 .rpc_resp = NULL,
1362 };
1363
1364 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1365}
1366
1367static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1368 unsigned int pgbase, unsigned int pglen)
1369{
1370 struct nfs4_exception exception = { };
1371 int err;
1372 do {
1373 err = nfs4_handle_exception(NFS_SERVER(inode),
1374 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1375 &exception);
1376 } while (exception.retry);
1377 return err;
1378}
1379
1380static int _nfs4_proc_read(struct nfs_read_data *rdata)
1381{
1382 int flags = rdata->flags;
1383 struct inode *inode = rdata->inode;
1384 struct nfs_fattr *fattr = rdata->res.fattr;
1385 struct nfs_server *server = NFS_SERVER(inode);
1386 struct rpc_message msg = {
1387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1388 .rpc_argp = &rdata->args,
1389 .rpc_resp = &rdata->res,
1390 .rpc_cred = rdata->cred,
1391 };
1392 unsigned long timestamp = jiffies;
1393 int status;
1394
1395 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1396 (long long) rdata->args.offset);
1397
1398 fattr->valid = 0;
1399 status = rpc_call_sync(server->client, &msg, flags);
1400 if (!status)
1401 renew_lease(server, timestamp);
1402 dprintk("NFS reply read: %d\n", status);
1403 return status;
1404}
1405
1406static int nfs4_proc_read(struct nfs_read_data *rdata)
1407{
1408 struct nfs4_exception exception = { };
1409 int err;
1410 do {
1411 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1412 _nfs4_proc_read(rdata),
1413 &exception);
1414 } while (exception.retry);
1415 return err;
1416}
1417
1418static int _nfs4_proc_write(struct nfs_write_data *wdata)
1419{
1420 int rpcflags = wdata->flags;
1421 struct inode *inode = wdata->inode;
1422 struct nfs_fattr *fattr = wdata->res.fattr;
1423 struct nfs_server *server = NFS_SERVER(inode);
1424 struct rpc_message msg = {
1425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1426 .rpc_argp = &wdata->args,
1427 .rpc_resp = &wdata->res,
1428 .rpc_cred = wdata->cred,
1429 };
1430 int status;
1431
1432 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1433 (long long) wdata->args.offset);
1434
1435 fattr->valid = 0;
1436 status = rpc_call_sync(server->client, &msg, rpcflags);
1437 dprintk("NFS reply write: %d\n", status);
1438 return status;
1439}
1440
1441static int nfs4_proc_write(struct nfs_write_data *wdata)
1442{
1443 struct nfs4_exception exception = { };
1444 int err;
1445 do {
1446 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1447 _nfs4_proc_write(wdata),
1448 &exception);
1449 } while (exception.retry);
1450 return err;
1451}
1452
1453static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1454{
1455 struct inode *inode = cdata->inode;
1456 struct nfs_fattr *fattr = cdata->res.fattr;
1457 struct nfs_server *server = NFS_SERVER(inode);
1458 struct rpc_message msg = {
1459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1460 .rpc_argp = &cdata->args,
1461 .rpc_resp = &cdata->res,
1462 .rpc_cred = cdata->cred,
1463 };
1464 int status;
1465
1466 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1467 (long long) cdata->args.offset);
1468
1469 fattr->valid = 0;
1470 status = rpc_call_sync(server->client, &msg, 0);
1471 dprintk("NFS reply commit: %d\n", status);
1472 return status;
1473}
1474
1475static int nfs4_proc_commit(struct nfs_write_data *cdata)
1476{
1477 struct nfs4_exception exception = { };
1478 int err;
1479 do {
1480 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1481 _nfs4_proc_commit(cdata),
1482 &exception);
1483 } while (exception.retry);
1484 return err;
1485}
1486
1487/*
1488 * Got race?
1489 * We will need to arrange for the VFS layer to provide an atomic open.
1490 * Until then, this create/open method is prone to inefficiency and race
1491 * conditions due to the lookup, create, and open VFS calls from sys_open()
1492 * placed on the wire.
1493 *
1494 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1495 * The file will be opened again in the subsequent VFS open call
1496 * (nfs4_proc_file_open).
1497 *
1498 * The open for read will just hang around to be used by any process that
1499 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1500 */
1501
1502static int
1503nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1504 int flags)
1505{
1506 struct nfs4_state *state;
1507 struct rpc_cred *cred;
1508 int status = 0;
1509
1510 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1511 if (IS_ERR(cred)) {
1512 status = PTR_ERR(cred);
1513 goto out;
1514 }
1515 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1516 put_rpccred(cred);
1517 if (IS_ERR(state)) {
1518 status = PTR_ERR(state);
1519 goto out;
1520 }
1521 d_instantiate(dentry, state->inode);
1522 if (flags & O_EXCL) {
1523 struct nfs_fattr fattr;
1524 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1525 NFS_FH(state->inode), sattr, state);
65e4308d
TM		 1526 if (status == 0) {
1527 nfs_setattr_update_inode(state->inode, sattr);
1da177e4 1528 goto out;
65e4308d 1529 }
1da177e4
LT		 1530 } else if (flags != 0)
1531 goto out;
1532 nfs4_close_state(state, flags);
1533out:
1534 return status;
1535}
1536
1537static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1538{
1539 struct nfs4_remove_arg args = {
1540 .fh = NFS_FH(dir),
1541 .name = name,
1542 };
1543 struct nfs4_change_info res;
1544 struct rpc_message msg = {
1545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1546 .rpc_argp = &args,
1547 .rpc_resp = &res,
1548 };
1549 int status;
1550
1551 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1552 if (status == 0)
1553 update_changeattr(dir, &res);
1554 return status;
1555}
1556
1557static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1558{
1559 struct nfs4_exception exception = { };
1560 int err;
1561 do {
1562 err = nfs4_handle_exception(NFS_SERVER(dir),
1563 _nfs4_proc_remove(dir, name),
1564 &exception);
1565 } while (exception.retry);
1566 return err;
1567}
1568
1569struct unlink_desc {
1570 struct nfs4_remove_arg args;
1571 struct nfs4_change_info res;
1572};
1573
1574static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1575 struct qstr *name)
1576{
1577 struct unlink_desc *up;
1578
1579 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1580 if (!up)
1581 return -ENOMEM;
1582
1583 up->args.fh = NFS_FH(dir->d_inode);
1584 up->args.name = name;
1585
1586 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1587 msg->rpc_argp = &up->args;
1588 msg->rpc_resp = &up->res;
1589 return 0;
1590}
1591
1592static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1593{
1594 struct rpc_message *msg = &task->tk_msg;
1595 struct unlink_desc *up;
1596
1597 if (msg->rpc_resp != NULL) {
1598 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1599 update_changeattr(dir->d_inode, &up->res);
1600 kfree(up);
1601 msg->rpc_resp = NULL;
1602 msg->rpc_argp = NULL;
1603 }
1604 return 0;
1605}
1606
1607static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1608 struct inode *new_dir, struct qstr *new_name)
1609{
1610 struct nfs4_rename_arg arg = {
1611 .old_dir = NFS_FH(old_dir),
1612 .new_dir = NFS_FH(new_dir),
1613 .old_name = old_name,
1614 .new_name = new_name,
1615 };
1616 struct nfs4_rename_res res = { };
1617 struct rpc_message msg = {
1618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1619 .rpc_argp = &arg,
1620 .rpc_resp = &res,
1621 };
1622 int status;
1623
1624 status = rpc_call_sync(NFS_CLIENT(old_dir), &msg, 0);
1625
1626 if (!status) {
1627 update_changeattr(old_dir, &res.old_cinfo);
1628 update_changeattr(new_dir, &res.new_cinfo);
1629 }
1630 return status;
1631}
1632
1633static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1634 struct inode *new_dir, struct qstr *new_name)
1635{
1636 struct nfs4_exception exception = { };
1637 int err;
1638 do {
1639 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1640 _nfs4_proc_rename(old_dir, old_name,
1641 new_dir, new_name),
1642 &exception);
1643 } while (exception.retry);
1644 return err;
1645}
1646
1647static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1648{
1649 struct nfs4_link_arg arg = {
1650 .fh = NFS_FH(inode),
1651 .dir_fh = NFS_FH(dir),
1652 .name = name,
1653 };
1654 struct nfs4_change_info cinfo = { };
1655 struct rpc_message msg = {
1656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1657 .rpc_argp = &arg,
1658 .rpc_resp = &cinfo,
1659 };
1660 int status;
1661
1662 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1663 if (!status)
1664 update_changeattr(dir, &cinfo);
1665
1666 return status;
1667}
1668
1669static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1670{
1671 struct nfs4_exception exception = { };
1672 int err;
1673 do {
1674 err = nfs4_handle_exception(NFS_SERVER(inode),
1675 _nfs4_proc_link(inode, dir, name),
1676 &exception);
1677 } while (exception.retry);
1678 return err;
1679}
1680
1681static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1682 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1683 struct nfs_fattr *fattr)
1684{
1685 struct nfs_server *server = NFS_SERVER(dir);
1686 struct nfs4_create_arg arg = {
1687 .dir_fh = NFS_FH(dir),
1688 .server = server,
1689 .name = name,
1690 .attrs = sattr,
1691 .ftype = NF4LNK,
1692 .bitmask = server->attr_bitmask,
1693 };
1694 struct nfs4_create_res res = {
1695 .server = server,
1696 .fh = fhandle,
1697 .fattr = fattr,
1698 };
1699 struct rpc_message msg = {
1700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
1701 .rpc_argp = &arg,
1702 .rpc_resp = &res,
1703 };
1704 int status;
1705
1706 if (path->len > NFS4_MAXPATHLEN)
1707 return -ENAMETOOLONG;
1708 arg.u.symlink = path;
1709 fattr->valid = 0;
1710
1711 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1712 if (!status)
1713 update_changeattr(dir, &res.dir_cinfo);
1714 return status;
1715}
1716
1717static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1718 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1719 struct nfs_fattr *fattr)
1720{
1721 struct nfs4_exception exception = { };
1722 int err;
1723 do {
1724 err = nfs4_handle_exception(NFS_SERVER(dir),
1725 _nfs4_proc_symlink(dir, name, path, sattr,
1726 fhandle, fattr),
1727 &exception);
1728 } while (exception.retry);
1729 return err;
1730}
1731
1732static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1733 struct iattr *sattr)
1734{
1735 struct nfs_server *server = NFS_SERVER(dir);
1736 struct nfs_fh fhandle;
1737 struct nfs_fattr fattr;
1738 struct nfs4_create_arg arg = {
1739 .dir_fh = NFS_FH(dir),
1740 .server = server,
1741 .name = &dentry->d_name,
1742 .attrs = sattr,
1743 .ftype = NF4DIR,
1744 .bitmask = server->attr_bitmask,
1745 };
1746 struct nfs4_create_res res = {
1747 .server = server,
1748 .fh = &fhandle,
1749 .fattr = &fattr,
1750 };
1751 struct rpc_message msg = {
1752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1753 .rpc_argp = &arg,
1754 .rpc_resp = &res,
1755 };
1756 int status;
1757
1758 fattr.valid = 0;
1759
1760 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1761 if (!status) {
1762 update_changeattr(dir, &res.dir_cinfo);
1763 status = nfs_instantiate(dentry, &fhandle, &fattr);
1764 }
1765 return status;
1766}
1767
1768static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1769 struct iattr *sattr)
1770{
1771 struct nfs4_exception exception = { };
1772 int err;
1773 do {
1774 err = nfs4_handle_exception(NFS_SERVER(dir),
1775 _nfs4_proc_mkdir(dir, dentry, sattr),
1776 &exception);
1777 } while (exception.retry);
1778 return err;
1779}
1780
1781static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1782 u64 cookie, struct page *page, unsigned int count, int plus)
1783{
1784 struct inode *dir = dentry->d_inode;
1785 struct nfs4_readdir_arg args = {
1786 .fh = NFS_FH(dir),
1787 .pages = &page,
1788 .pgbase = 0,
1789 .count = count,
1790 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1791 };
1792 struct nfs4_readdir_res res;
1793 struct rpc_message msg = {
1794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
1795 .rpc_argp = &args,
1796 .rpc_resp = &res,
1797 .rpc_cred = cred,
1798 };
1799 int status;
1800
eadf4598
TM		 1801 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
1802 dentry->d_parent->d_name.name,
1803 dentry->d_name.name,
1804 (unsigned long long)cookie);
1da177e4
LT		 1805 lock_kernel();
1806 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
1807 res.pgbase = args.pgbase;
1808 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1809 if (status == 0)
1810 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
1811 unlock_kernel();
eadf4598 1812 dprintk("%s: returns %d\n", __FUNCTION__, status);
1da177e4
LT		 1813 return status;
1814}
1815
1816static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
1817 u64 cookie, struct page *page, unsigned int count, int plus)
1818{
1819 struct nfs4_exception exception = { };
1820 int err;
1821 do {
1822 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
1823 _nfs4_proc_readdir(dentry, cred, cookie,
1824 page, count, plus),
1825 &exception);
1826 } while (exception.retry);
1827 return err;
1828}
1829
1830static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1831 struct iattr *sattr, dev_t rdev)
1832{
1833 struct nfs_server *server = NFS_SERVER(dir);
1834 struct nfs_fh fh;
1835 struct nfs_fattr fattr;
1836 struct nfs4_create_arg arg = {
1837 .dir_fh = NFS_FH(dir),
1838 .server = server,
1839 .name = &dentry->d_name,
1840 .attrs = sattr,
1841 .bitmask = server->attr_bitmask,
1842 };
1843 struct nfs4_create_res res = {
1844 .server = server,
1845 .fh = &fh,
1846 .fattr = &fattr,
1847 };
1848 struct rpc_message msg = {
1849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
1850 .rpc_argp = &arg,
1851 .rpc_resp = &res,
1852 };
1853 int status;
1854 int mode = sattr->ia_mode;
1855
1856 fattr.valid = 0;
1857
1858 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
1859 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
1860 if (S_ISFIFO(mode))
1861 arg.ftype = NF4FIFO;
1862 else if (S_ISBLK(mode)) {
1863 arg.ftype = NF4BLK;
1864 arg.u.device.specdata1 = MAJOR(rdev);
1865 arg.u.device.specdata2 = MINOR(rdev);
1866 }
1867 else if (S_ISCHR(mode)) {
1868 arg.ftype = NF4CHR;
1869 arg.u.device.specdata1 = MAJOR(rdev);
1870 arg.u.device.specdata2 = MINOR(rdev);
1871 }
1872 else
1873 arg.ftype = NF4SOCK;
1874
1875 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1876 if (status == 0) {
1877 update_changeattr(dir, &res.dir_cinfo);
1878 status = nfs_instantiate(dentry, &fh, &fattr);
1879 }
1880 return status;
1881}
1882
1883static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
1884 struct iattr *sattr, dev_t rdev)
1885{
1886 struct nfs4_exception exception = { };
1887 int err;
1888 do {
1889 err = nfs4_handle_exception(NFS_SERVER(dir),
1890 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
1891 &exception);
1892 } while (exception.retry);
1893 return err;
1894}
1895
1896static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
1897 struct nfs_fsstat *fsstat)
1898{
1899 struct nfs4_statfs_arg args = {
1900 .fh = fhandle,
1901 .bitmask = server->attr_bitmask,
1902 };
1903 struct rpc_message msg = {
1904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
1905 .rpc_argp = &args,
1906 .rpc_resp = fsstat,
1907 };
1908
1909 fsstat->fattr->valid = 0;
1910 return rpc_call_sync(server->client, &msg, 0);
1911}
1912
1913static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
1914{
1915 struct nfs4_exception exception = { };
1916 int err;
1917 do {
1918 err = nfs4_handle_exception(server,
1919 _nfs4_proc_statfs(server, fhandle, fsstat),
1920 &exception);
1921 } while (exception.retry);
1922 return err;
1923}
1924
1925static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
1926 struct nfs_fsinfo *fsinfo)
1927{
1928 struct nfs4_fsinfo_arg args = {
1929 .fh = fhandle,
1930 .bitmask = server->attr_bitmask,
1931 };
1932 struct rpc_message msg = {
1933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
1934 .rpc_argp = &args,
1935 .rpc_resp = fsinfo,
1936 };
1937
1938 return rpc_call_sync(server->client, &msg, 0);
1939}
1940
1941static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1942{
1943 struct nfs4_exception exception = { };
1944 int err;
1945
1946 do {
1947 err = nfs4_handle_exception(server,
1948 _nfs4_do_fsinfo(server, fhandle, fsinfo),
1949 &exception);
1950 } while (exception.retry);
1951 return err;
1952}
1953
1954static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
1955{
1956 fsinfo->fattr->valid = 0;
1957 return nfs4_do_fsinfo(server, fhandle, fsinfo);
1958}
1959
1960static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1961 struct nfs_pathconf *pathconf)
1962{
1963 struct nfs4_pathconf_arg args = {
1964 .fh = fhandle,
1965 .bitmask = server->attr_bitmask,
1966 };
1967 struct rpc_message msg = {
1968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
1969 .rpc_argp = &args,
1970 .rpc_resp = pathconf,
1971 };
1972
1973 /* None of the pathconf attributes are mandatory to implement */
1974 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
1975 memset(pathconf, 0, sizeof(*pathconf));
1976 return 0;
1977 }
1978
1979 pathconf->fattr->valid = 0;
1980 return rpc_call_sync(server->client, &msg, 0);
1981}
1982
1983static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
1984 struct nfs_pathconf *pathconf)
1985{
1986 struct nfs4_exception exception = { };
1987 int err;
1988
1989 do {
1990 err = nfs4_handle_exception(server,
1991 _nfs4_proc_pathconf(server, fhandle, pathconf),
1992 &exception);
1993 } while (exception.retry);
1994 return err;
1995}
1996
1997static void
1998nfs4_read_done(struct rpc_task *task)
1999{
2000 struct nfs_read_data *data = (struct nfs_read_data *) task->tk_calldata;
2001 struct inode *inode = data->inode;
2002
2003 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2004 rpc_restart_call(task);
2005 return;
2006 }
2007 if (task->tk_status > 0)
2008 renew_lease(NFS_SERVER(inode), data->timestamp);
2009 /* Call back common NFS readpage processing */
2010 nfs_readpage_result(task);
2011}
2012
2013static void
2014nfs4_proc_read_setup(struct nfs_read_data *data)
2015{
2016 struct rpc_task *task = &data->task;
2017 struct rpc_message msg = {
2018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2019 .rpc_argp = &data->args,
2020 .rpc_resp = &data->res,
2021 .rpc_cred = data->cred,
2022 };
2023 struct inode *inode = data->inode;
2024 int flags;
2025
2026 data->timestamp = jiffies;
2027
2028 /* N.B. Do we need to test? Never called for swapfile inode */
2029 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2030
2031 /* Finalize the task. */
2032 rpc_init_task(task, NFS_CLIENT(inode), nfs4_read_done, flags);
2033 rpc_call_setup(task, &msg, 0);
2034}
2035
2036static void
2037nfs4_write_done(struct rpc_task *task)
2038{
2039 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2040 struct inode *inode = data->inode;
2041
2042 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2043 rpc_restart_call(task);
2044 return;
2045 }
2046 if (task->tk_status >= 0)
2047 renew_lease(NFS_SERVER(inode), data->timestamp);
2048 /* Call back common NFS writeback processing */
2049 nfs_writeback_done(task);
2050}
2051
2052static void
2053nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2054{
2055 struct rpc_task *task = &data->task;
2056 struct rpc_message msg = {
2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2058 .rpc_argp = &data->args,
2059 .rpc_resp = &data->res,
2060 .rpc_cred = data->cred,
2061 };
2062 struct inode *inode = data->inode;
2063 int stable;
2064 int flags;
2065
2066 if (how & FLUSH_STABLE) {
2067 if (!NFS_I(inode)->ncommit)
2068 stable = NFS_FILE_SYNC;
2069 else
2070 stable = NFS_DATA_SYNC;
2071 } else
2072 stable = NFS_UNSTABLE;
2073 data->args.stable = stable;
2074
2075 data->timestamp = jiffies;
2076
2077 /* Set the initial flags for the task. */
2078 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2079
2080 /* Finalize the task. */
2081 rpc_init_task(task, NFS_CLIENT(inode), nfs4_write_done, flags);
2082 rpc_call_setup(task, &msg, 0);
2083}
2084
2085static void
2086nfs4_commit_done(struct rpc_task *task)
2087{
2088 struct nfs_write_data *data = (struct nfs_write_data *) task->tk_calldata;
2089 struct inode *inode = data->inode;
2090
2091 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2092 rpc_restart_call(task);
2093 return;
2094 }
2095 /* Call back common NFS writeback processing */
2096 nfs_commit_done(task);
2097}
2098
2099static void
2100nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2101{
2102 struct rpc_task *task = &data->task;
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2105 .rpc_argp = &data->args,
2106 .rpc_resp = &data->res,
2107 .rpc_cred = data->cred,
2108 };
2109 struct inode *inode = data->inode;
2110 int flags;
2111
2112 /* Set the initial flags for the task. */
2113 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2114
2115 /* Finalize the task. */
2116 rpc_init_task(task, NFS_CLIENT(inode), nfs4_commit_done, flags);
2117 rpc_call_setup(task, &msg, 0);
2118}
2119
2120/*
2121 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2122 * standalone procedure for queueing an asynchronous RENEW.
2123 */
2124static void
2125renew_done(struct rpc_task *task)
2126{
2127 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2128 unsigned long timestamp = (unsigned long)task->tk_calldata;
2129
2130 if (task->tk_status < 0) {
2131 switch (task->tk_status) {
2132 case -NFS4ERR_STALE_CLIENTID:
2133 case -NFS4ERR_EXPIRED:
2134 case -NFS4ERR_CB_PATH_DOWN:
2135 nfs4_schedule_state_recovery(clp);
2136 }
2137 return;
2138 }
2139 spin_lock(&clp->cl_lock);
2140 if (time_before(clp->cl_last_renewal,timestamp))
2141 clp->cl_last_renewal = timestamp;
2142 spin_unlock(&clp->cl_lock);
2143}
2144
2145int
2146nfs4_proc_async_renew(struct nfs4_client *clp)
2147{
2148 struct rpc_message msg = {
2149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2150 .rpc_argp = clp,
2151 .rpc_cred = clp->cl_cred,
2152 };
2153
2154 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2155 renew_done, (void *)jiffies);
2156}
2157
2158int
2159nfs4_proc_renew(struct nfs4_client *clp)
2160{
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2163 .rpc_argp = clp,
2164 .rpc_cred = clp->cl_cred,
2165 };
2166 unsigned long now = jiffies;
2167 int status;
2168
2169 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2170 if (status < 0)
2171 return status;
2172 spin_lock(&clp->cl_lock);
2173 if (time_before(clp->cl_last_renewal,now))
2174 clp->cl_last_renewal = now;
2175 spin_unlock(&clp->cl_lock);
2176 return 0;
2177}
2178
2179/*
2180 * We will need to arrange for the VFS layer to provide an atomic open.
2181 * Until then, this open method is prone to inefficiency and race conditions
2182 * due to the lookup, potential create, and open VFS calls from sys_open()
2183 * placed on the wire.
2184 */
2185static int
2186nfs4_proc_file_open(struct inode *inode, struct file *filp)
2187{
2188 struct dentry *dentry = filp->f_dentry;
2189 struct nfs_open_context *ctx;
2190 struct nfs4_state *state = NULL;
2191 struct rpc_cred *cred;
2192 int status = -ENOMEM;
2193
2194 dprintk("nfs4_proc_file_open: starting on (%.*s/%.*s)\n",
2195 (int)dentry->d_parent->d_name.len,
2196 dentry->d_parent->d_name.name,
2197 (int)dentry->d_name.len, dentry->d_name.name);
2198
2199
2200 /* Find our open stateid */
2201 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
2202 if (IS_ERR(cred))
2203 return PTR_ERR(cred);
2204 ctx = alloc_nfs_open_context(dentry, cred);
2205 put_rpccred(cred);
2206 if (unlikely(ctx == NULL))
2207 return -ENOMEM;
2208 status = -EIO; /* ERACE actually */
2209 state = nfs4_find_state(inode, cred, filp->f_mode);
2210 if (unlikely(state == NULL))
2211 goto no_state;
2212 ctx->state = state;
2213 nfs4_close_state(state, filp->f_mode);
2214 ctx->mode = filp->f_mode;
2215 nfs_file_set_open_context(filp, ctx);
2216 put_nfs_open_context(ctx);
2217 if (filp->f_mode & FMODE_WRITE)
2218 nfs_begin_data_update(inode);
2219 return 0;
2220no_state:
2221 printk(KERN_WARNING "NFS: v4 raced in function %s\n", __FUNCTION__);
2222 put_nfs_open_context(ctx);
2223 return status;
2224}
2225
2226/*
2227 * Release our state
2228 */
2229static int
2230nfs4_proc_file_release(struct inode *inode, struct file *filp)
2231{
2232 if (filp->f_mode & FMODE_WRITE)
2233 nfs_end_data_update(inode);
2234 nfs_file_clear_open_context(filp);
2235 return 0;
2236}
2237
aa1870af
BF		 2238static inline int nfs4_server_supports_acls(struct nfs_server *server)
2239{
2240 return (server->caps & NFS_CAP_ACLS)
2241 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2242 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2243}
2244
2245/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2246 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2247 * the stack.
2248 */
2249#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2250
2251static void buf_to_pages(const void *buf, size_t buflen,
2252 struct page **pages, unsigned int *pgbase)
2253{
2254 const void *p = buf;
2255
2256 *pgbase = offset_in_page(buf);
2257 p -= *pgbase;
2258 while (p < buf + buflen) {
2259 *(pages++) = virt_to_page(p);
2260 p += PAGE_CACHE_SIZE;
2261 }
2262}
2263
e50a1c2e
BF		 2264struct nfs4_cached_acl {
2265 int cached;
2266 size_t len;
3e9d4154 2267 char data[0];
e50a1c2e
BF		 2268};
2269
2270static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2271{
2272 struct nfs_inode *nfsi = NFS_I(inode);
2273
2274 spin_lock(&inode->i_lock);
2275 kfree(nfsi->nfs4_acl);
2276 nfsi->nfs4_acl = acl;
2277 spin_unlock(&inode->i_lock);
2278}
2279
2280static void nfs4_zap_acl_attr(struct inode *inode)
2281{
2282 nfs4_set_cached_acl(inode, NULL);
2283}
2284
2285static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2286{
2287 struct nfs_inode *nfsi = NFS_I(inode);
2288 struct nfs4_cached_acl *acl;
2289 int ret = -ENOENT;
2290
2291 spin_lock(&inode->i_lock);
2292 acl = nfsi->nfs4_acl;
2293 if (acl == NULL)
2294 goto out;
2295 if (buf == NULL) /* user is just asking for length */
2296 goto out_len;
2297 if (acl->cached == 0)
2298 goto out;
2299 ret = -ERANGE; /* see getxattr(2) man page */
2300 if (acl->len > buflen)
2301 goto out;
2302 memcpy(buf, acl->data, acl->len);
2303out_len:
2304 ret = acl->len;
2305out:
2306 spin_unlock(&inode->i_lock);
2307 return ret;
2308}
2309
2310static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2311{
2312 struct nfs4_cached_acl *acl;
2313
2314 if (buf && acl_len <= PAGE_SIZE) {
2315 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2316 if (acl == NULL)
2317 goto out;
2318 acl->cached = 1;
2319 memcpy(acl->data, buf, acl_len);
2320 } else {
2321 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2322 if (acl == NULL)
2323 goto out;
2324 acl->cached = 0;
2325 }
2326 acl->len = acl_len;
2327out:
2328 nfs4_set_cached_acl(inode, acl);
2329}
2330
2331static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 2332{
aa1870af
BF		 2333 struct page *pages[NFS4ACL_MAXPAGES];
2334 struct nfs_getaclargs args = {
2335 .fh = NFS_FH(inode),
2336 .acl_pages = pages,
2337 .acl_len = buflen,
2338 };
2339 size_t resp_len = buflen;
e50a1c2e 2340 void *resp_buf;
aa1870af
BF		 2341 struct rpc_message msg = {
2342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2343 .rpc_argp = &args,
2344 .rpc_resp = &resp_len,
2345 };
e50a1c2e 2346 struct page *localpage = NULL;
aa1870af
BF		 2347 int ret;
2348
e50a1c2e
BF		 2349 if (buflen < PAGE_SIZE) {
2350 /* As long as we're doing a round trip to the server anyway,
2351 * let's be prepared for a page of acl data. */
2352 localpage = alloc_page(GFP_KERNEL);
2353 resp_buf = page_address(localpage);
2354 if (localpage == NULL)
2355 return -ENOMEM;
2356 args.acl_pages[0] = localpage;
2357 args.acl_pgbase = 0;
2358 args.acl_len = PAGE_SIZE;
2359 } else {
2360 resp_buf = buf;
2361 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2362 }
aa1870af 2363 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
e50a1c2e
BF		 2364 if (ret)
2365 goto out_free;
2366 if (resp_len > args.acl_len)
2367 nfs4_write_cached_acl(inode, NULL, resp_len);
2368 else
2369 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2370 if (buf) {
2371 ret = -ERANGE;
2372 if (resp_len > buflen)
2373 goto out_free;
2374 if (localpage)
2375 memcpy(buf, resp_buf, resp_len);
2376 }
2377 ret = resp_len;
2378out_free:
2379 if (localpage)
2380 __free_page(localpage);
aa1870af
BF		 2381 return ret;
2382}
2383
e50a1c2e
BF		 2384static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2385{
2386 struct nfs_server *server = NFS_SERVER(inode);
2387 int ret;
2388
2389 if (!nfs4_server_supports_acls(server))
2390 return -EOPNOTSUPP;
2391 ret = nfs_revalidate_inode(server, inode);
2392 if (ret < 0)
2393 return ret;
2394 ret = nfs4_read_cached_acl(inode, buf, buflen);
2395 if (ret != -ENOENT)
2396 return ret;
2397 return nfs4_get_acl_uncached(inode, buf, buflen);
2398}
2399
4b580ee3
BF		 2400static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2401{
2402 struct nfs_server *server = NFS_SERVER(inode);
2403 struct page *pages[NFS4ACL_MAXPAGES];
2404 struct nfs_setaclargs arg = {
2405 .fh = NFS_FH(inode),
2406 .acl_pages = pages,
2407 .acl_len = buflen,
2408 };
2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2411 .rpc_argp = &arg,
2412 .rpc_resp = NULL,
2413 };
2414 int ret;
2415
2416 if (!nfs4_server_supports_acls(server))
2417 return -EOPNOTSUPP;
2418 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2419 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
e50a1c2e
BF		 2420 if (ret == 0)
2421 nfs4_write_cached_acl(inode, buf, buflen);
4b580ee3
BF		 2422 return ret;
2423}
2424
1da177e4
LT		 2425static int
2426nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
2427{
2428 struct nfs4_client *clp = server->nfs4_state;
2429
2430 if (!clp || task->tk_status >= 0)
2431 return 0;
2432 switch(task->tk_status) {
2433 case -NFS4ERR_STALE_CLIENTID:
2434 case -NFS4ERR_STALE_STATEID:
2435 case -NFS4ERR_EXPIRED:
2436 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2437 nfs4_schedule_state_recovery(clp);
2438 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2439 rpc_wake_up_task(task);
2440 task->tk_status = 0;
2441 return -EAGAIN;
2442 case -NFS4ERR_GRACE:
2443 case -NFS4ERR_DELAY:
2444 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2445 task->tk_status = 0;
2446 return -EAGAIN;
2447 case -NFS4ERR_OLD_STATEID:
2448 task->tk_status = 0;
2449 return -EAGAIN;
2450 }
2451 task->tk_status = nfs4_map_errors(task->tk_status);
2452 return 0;
2453}
2454
2455static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2456{
2457 DEFINE_WAIT(wait);
2458 sigset_t oldset;
2459 int interruptible, res = 0;
2460
2461 might_sleep();
2462
2463 rpc_clnt_sigmask(clnt, &oldset);
2464 interruptible = TASK_UNINTERRUPTIBLE;
2465 if (clnt->cl_intr)
2466 interruptible = TASK_INTERRUPTIBLE;
2467 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2468 nfs4_schedule_state_recovery(clp);
2469 if (clnt->cl_intr && signalled())
2470 res = -ERESTARTSYS;
2471 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2472 schedule();
2473 finish_wait(&clp->cl_waitq, &wait);
2474 rpc_clnt_sigunmask(clnt, &oldset);
2475 return res;
2476}
2477
2478static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2479{
2480 sigset_t oldset;
2481 int res = 0;
2482
2483 might_sleep();
2484
2485 if (*timeout <= 0)
2486 *timeout = NFS4_POLL_RETRY_MIN;
2487 if (*timeout > NFS4_POLL_RETRY_MAX)
2488 *timeout = NFS4_POLL_RETRY_MAX;
2489 rpc_clnt_sigmask(clnt, &oldset);
2490 if (clnt->cl_intr) {
041e0e3b 2491 schedule_timeout_interruptible(*timeout);
1da177e4
LT		 2492 if (signalled())
2493 res = -ERESTARTSYS;
041e0e3b
NA		 2494 } else
2495 schedule_timeout_uninterruptible(*timeout);
1da177e4
LT		 2496 rpc_clnt_sigunmask(clnt, &oldset);
2497 *timeout <<= 1;
2498 return res;
2499}
2500
2501/* This is the error handling routine for processes that are allowed
2502 * to sleep.
2503 */
2504int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2505{
2506 struct nfs4_client *clp = server->nfs4_state;
2507 int ret = errorcode;
2508
2509 exception->retry = 0;
2510 switch(errorcode) {
2511 case 0:
2512 return 0;
2513 case -NFS4ERR_STALE_CLIENTID:
2514 case -NFS4ERR_STALE_STATEID:
2515 case -NFS4ERR_EXPIRED:
2516 ret = nfs4_wait_clnt_recover(server->client, clp);
2517 if (ret == 0)
2518 exception->retry = 1;
2519 break;
2520 case -NFS4ERR_GRACE:
2521 case -NFS4ERR_DELAY:
2522 ret = nfs4_delay(server->client, &exception->timeout);
2523 if (ret == 0)
2524 exception->retry = 1;
2525 break;
2526 case -NFS4ERR_OLD_STATEID:
2527 if (ret == 0)
2528 exception->retry = 1;
2529 }
2530 /* We failed to handle the error */
2531 return nfs4_map_errors(ret);
2532}
2533
2534int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2535{
2536 nfs4_verifier sc_verifier;
2537 struct nfs4_setclientid setclientid = {
2538 .sc_verifier = &sc_verifier,
2539 .sc_prog = program,
2540 };
2541 struct rpc_message msg = {
2542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2543 .rpc_argp = &setclientid,
2544 .rpc_resp = clp,
2545 .rpc_cred = clp->cl_cred,
2546 };
2547 u32 *p;
2548 int loop = 0;
2549 int status;
2550
2551 p = (u32*)sc_verifier.data;
2552 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2553 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2554
2555 for(;;) {
2556 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2557 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2558 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2559 clp->cl_cred->cr_ops->cr_name,
2560 clp->cl_id_uniquifier);
2561 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2562 sizeof(setclientid.sc_netid), "tcp");
2563 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2564 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2565 clp->cl_ipaddr, port >> 8, port & 255);
2566
2567 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2568 if (status != -NFS4ERR_CLID_INUSE)
2569 break;
2570 if (signalled())
2571 break;
2572 if (loop++ & 1)
2573 ssleep(clp->cl_lease_time + 1);
2574 else
2575 if (++clp->cl_id_uniquifier == 0)
2576 break;
2577 }
2578 return status;
2579}
2580
2581int
2582nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2583{
2584 struct nfs_fsinfo fsinfo;
2585 struct rpc_message msg = {
2586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2587 .rpc_argp = clp,
2588 .rpc_resp = &fsinfo,
2589 .rpc_cred = clp->cl_cred,
2590 };
2591 unsigned long now;
2592 int status;
2593
2594 now = jiffies;
2595 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2596 if (status == 0) {
2597 spin_lock(&clp->cl_lock);
2598 clp->cl_lease_time = fsinfo.lease_time * HZ;
2599 clp->cl_last_renewal = now;
2600 spin_unlock(&clp->cl_lock);
2601 }
2602 return status;
2603}
2604
2605static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2606{
2607 struct nfs4_delegreturnargs args = {
2608 .fhandle = NFS_FH(inode),
2609 .stateid = stateid,
2610 };
2611 struct rpc_message msg = {
2612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2613 .rpc_argp = &args,
2614 .rpc_cred = cred,
2615 };
2616
2617 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2618}
2619
2620int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2621{
2622 struct nfs_server *server = NFS_SERVER(inode);
2623 struct nfs4_exception exception = { };
2624 int err;
2625 do {
2626 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2627 switch (err) {
2628 case -NFS4ERR_STALE_STATEID:
2629 case -NFS4ERR_EXPIRED:
2630 nfs4_schedule_state_recovery(server->nfs4_state);
2631 case 0:
2632 return 0;
2633 }
2634 err = nfs4_handle_exception(server, err, &exception);
2635 } while (exception.retry);
2636 return err;
2637}
2638
2639#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2640#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2641
2642/*
2643 * sleep, with exponential backoff, and retry the LOCK operation.
2644 */
2645static unsigned long
2646nfs4_set_lock_task_retry(unsigned long timeout)
2647{
041e0e3b 2648 schedule_timeout_interruptible(timeout);
1da177e4
LT		 2649 timeout <<= 1;
2650 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2651 return NFS4_LOCK_MAXTIMEOUT;
2652 return timeout;
2653}
2654
2655static inline int
2656nfs4_lck_type(int cmd, struct file_lock *request)
2657{
2658 /* set lock type */
2659 switch (request->fl_type) {
2660 case F_RDLCK:
2661 return IS_SETLKW(cmd) ? NFS4_READW_LT : NFS4_READ_LT;
2662 case F_WRLCK:
2663 return IS_SETLKW(cmd) ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
2664 case F_UNLCK:
2665 return NFS4_WRITE_LT;
2666 }
2667 BUG();
2668 return 0;
2669}
2670
2671static inline uint64_t
2672nfs4_lck_length(struct file_lock *request)
2673{
2674 if (request->fl_end == OFFSET_MAX)
2675 return ~(uint64_t)0;
2676 return request->fl_end - request->fl_start + 1;
2677}
2678
2679static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2680{
2681 struct inode *inode = state->inode;
2682 struct nfs_server *server = NFS_SERVER(inode);
2683 struct nfs4_client *clp = server->nfs4_state;
2684 struct nfs_lockargs arg = {
2685 .fh = NFS_FH(inode),
2686 .type = nfs4_lck_type(cmd, request),
2687 .offset = request->fl_start,
2688 .length = nfs4_lck_length(request),
2689 };
2690 struct nfs_lockres res = {
2691 .server = server,
2692 };
2693 struct rpc_message msg = {
2694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
2695 .rpc_argp = &arg,
2696 .rpc_resp = &res,
2697 .rpc_cred = state->owner->so_cred,
2698 };
2699 struct nfs_lowner nlo;
2700 struct nfs4_lock_state *lsp;
2701 int status;
2702
2703 down_read(&clp->cl_sem);
2704 nlo.clientid = clp->cl_clientid;
2705 down(&state->lock_sema);
8d0a8a9d
TM		 2706 status = nfs4_set_lock_state(state, request);
2707 if (status != 0)
2708 goto out;
2709 lsp = request->fl_u.nfs4_fl.owner;
2710 nlo.id = lsp->ls_id;
1da177e4
LT		 2711 arg.u.lockt = &nlo;
2712 status = rpc_call_sync(server->client, &msg, 0);
2713 if (!status) {
2714 request->fl_type = F_UNLCK;
2715 } else if (status == -NFS4ERR_DENIED) {
2716 int64_t len, start, end;
2717 start = res.u.denied.offset;
2718 len = res.u.denied.length;
2719 end = start + len - 1;
2720 if (end < 0 || len == 0)
2721 request->fl_end = OFFSET_MAX;
2722 else
2723 request->fl_end = (loff_t)end;
2724 request->fl_start = (loff_t)start;
2725 request->fl_type = F_WRLCK;
2726 if (res.u.denied.type & 1)
2727 request->fl_type = F_RDLCK;
2728 request->fl_pid = 0;
2729 status = 0;
2730 }
8d0a8a9d 2731out:
1da177e4
LT		 2732 up(&state->lock_sema);
2733 up_read(&clp->cl_sem);
2734 return status;
2735}
2736
2737static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2738{
2739 struct nfs4_exception exception = { };
2740 int err;
2741
2742 do {
2743 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2744 _nfs4_proc_getlk(state, cmd, request),
2745 &exception);
2746 } while (exception.retry);
2747 return err;
2748}
2749
2750static int do_vfs_lock(struct file *file, struct file_lock *fl)
2751{
2752 int res = 0;
2753 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
2754 case FL_POSIX:
2755 res = posix_lock_file_wait(file, fl);
2756 break;
2757 case FL_FLOCK:
2758 res = flock_lock_file_wait(file, fl);
2759 break;
2760 default:
2761 BUG();
2762 }
2763 if (res < 0)
2764 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
2765 __FUNCTION__);
2766 return res;
2767}
2768
2769static int _nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2770{
2771 struct inode *inode = state->inode;
2772 struct nfs_server *server = NFS_SERVER(inode);
2773 struct nfs4_client *clp = server->nfs4_state;
2774 struct nfs_lockargs arg = {
2775 .fh = NFS_FH(inode),
2776 .type = nfs4_lck_type(cmd, request),
2777 .offset = request->fl_start,
2778 .length = nfs4_lck_length(request),
2779 };
2780 struct nfs_lockres res = {
2781 .server = server,
2782 };
2783 struct rpc_message msg = {
2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
2785 .rpc_argp = &arg,
2786 .rpc_resp = &res,
2787 .rpc_cred = state->owner->so_cred,
2788 };
2789 struct nfs4_lock_state *lsp;
2790 struct nfs_locku_opargs luargs;
8d0a8a9d 2791 int status;
1da177e4
LT		 2792
2793 down_read(&clp->cl_sem);
2794 down(&state->lock_sema);
8d0a8a9d
TM		 2795 status = nfs4_set_lock_state(state, request);
2796 if (status != 0)
1da177e4 2797 goto out;
8d0a8a9d 2798 lsp = request->fl_u.nfs4_fl.owner;
1da177e4 2799 /* We might have lost the locks! */
8d0a8a9d
TM		 2800 if ((lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0)
2801 goto out;
cee54fc9
TM		 2802 luargs.seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2803 status = -ENOMEM;
2804 if (luargs.seqid == NULL)
2805 goto out;
2806 memcpy(luargs.stateid.data, lsp->ls_stateid.data, sizeof(luargs.stateid.data));
8d0a8a9d
TM		 2807 arg.u.locku = &luargs;
2808 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
cee54fc9 2809 nfs_increment_lock_seqid(status, luargs.seqid);
1da177e4 2810
8d0a8a9d 2811 if (status == 0)
cee54fc9
TM		 2812 memcpy(lsp->ls_stateid.data, res.u.stateid.data,
2813 sizeof(lsp->ls_stateid.data));
2814 nfs_free_seqid(luargs.seqid);
1da177e4
LT		 2815out:
2816 up(&state->lock_sema);
2817 if (status == 0)
2818 do_vfs_lock(request->fl_file, request);
2819 up_read(&clp->cl_sem);
2820 return status;
2821}
2822
2823static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
2824{
2825 struct nfs4_exception exception = { };
2826 int err;
2827
2828 do {
2829 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2830 _nfs4_proc_unlck(state, cmd, request),
2831 &exception);
2832 } while (exception.retry);
2833 return err;
2834}
2835
2836static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *request, int reclaim)
2837{
2838 struct inode *inode = state->inode;
2839 struct nfs_server *server = NFS_SERVER(inode);
8d0a8a9d 2840 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
1da177e4
LT		 2841 struct nfs_lockargs arg = {
2842 .fh = NFS_FH(inode),
2843 .type = nfs4_lck_type(cmd, request),
2844 .offset = request->fl_start,
2845 .length = nfs4_lck_length(request),
2846 };
2847 struct nfs_lockres res = {
2848 .server = server,
2849 };
2850 struct rpc_message msg = {
2851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
2852 .rpc_argp = &arg,
2853 .rpc_resp = &res,
2854 .rpc_cred = state->owner->so_cred,
2855 };
2856 struct nfs_lock_opargs largs = {
2857 .reclaim = reclaim,
2858 .new_lock_owner = 0,
2859 };
cee54fc9
TM		 2860 struct nfs_seqid *lock_seqid;
2861 int status = -ENOMEM;
1da177e4 2862
cee54fc9
TM		 2863 lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
2864 if (lock_seqid == NULL)
2865 return -ENOMEM;
2866 if (!(lsp->ls_seqid.flags & NFS_SEQID_CONFIRMED)) {
1da177e4
LT		 2867 struct nfs4_state_owner *owner = state->owner;
2868 struct nfs_open_to_lock otl = {
2869 .lock_owner = {
2870 .clientid = server->nfs4_state->cl_clientid,
2871 },
2872 };
2873
cee54fc9 2874 otl.lock_seqid = lock_seqid;
1da177e4
LT		 2875 otl.lock_owner.id = lsp->ls_id;
2876 memcpy(&otl.open_stateid, &state->stateid, sizeof(otl.open_stateid));
2877 largs.u.open_lock = &otl;
2878 largs.new_lock_owner = 1;
2879 arg.u.lock = &largs;
2880 down(&owner->so_sema);
cee54fc9
TM		 2881 otl.open_seqid = nfs_alloc_seqid(&owner->so_seqid);
2882 if (otl.open_seqid != NULL) {
2883 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2884 /* increment seqid on success, and seqid mutating errors */
2885 nfs_increment_open_seqid(status, otl.open_seqid);
2886 nfs_free_seqid(otl.open_seqid);
8d0a8a9d 2887 }
cee54fc9
TM		 2888 up(&owner->so_sema);
2889 if (status == 0)
2890 nfs_confirm_seqid(&lsp->ls_seqid, 0);
1da177e4 2891 } else {
cee54fc9 2892 struct nfs_exist_lock el;
1da177e4
LT		 2893 memcpy(&el.stateid, &lsp->ls_stateid, sizeof(el.stateid));
2894 largs.u.exist_lock = &el;
1da177e4 2895 arg.u.lock = &largs;
cee54fc9 2896 el.seqid = lock_seqid;
1da177e4
LT		 2897 status = rpc_call_sync(server->client, &msg, RPC_TASK_NOINTR);
2898 }
cee54fc9
TM		 2899 /* increment seqid on success, and seqid mutating errors*/
2900 nfs_increment_lock_seqid(status, lock_seqid);
1da177e4 2901 /* save the returned stateid. */
cee54fc9
TM		 2902 if (status == 0) {
2903 memcpy(lsp->ls_stateid.data, res.u.stateid.data, sizeof(lsp->ls_stateid.data));
2904 lsp->ls_flags |= NFS_LOCK_INITIALIZED;
2905 } else if (status == -NFS4ERR_DENIED)
1da177e4 2906 status = -EAGAIN;
cee54fc9 2907 nfs_free_seqid(lock_seqid);
1da177e4
LT		 2908 return status;
2909}
2910
2911static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
2912{
202b50dc
TM		 2913 struct nfs_server *server = NFS_SERVER(state->inode);
2914 struct nfs4_exception exception = { };
2915 int err;
2916
2917 do {
2918 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
2919 if (err != -NFS4ERR_DELAY)
2920 break;
2921 nfs4_handle_exception(server, err, &exception);
2922 } while (exception.retry);
2923 return err;
1da177e4
LT		 2924}
2925
2926static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
2927{
202b50dc
TM		 2928 struct nfs_server *server = NFS_SERVER(state->inode);
2929 struct nfs4_exception exception = { };
2930 int err;
2931
2932 do {
2933 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
2934 if (err != -NFS4ERR_DELAY)
2935 break;
2936 nfs4_handle_exception(server, err, &exception);
2937 } while (exception.retry);
2938 return err;
1da177e4
LT		 2939}
2940
2941static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2942{
2943 struct nfs4_client *clp = state->owner->so_client;
2944 int status;
2945
2946 down_read(&clp->cl_sem);
2947 down(&state->lock_sema);
8d0a8a9d
TM		 2948 status = nfs4_set_lock_state(state, request);
2949 if (status == 0)
2950 status = _nfs4_do_setlk(state, cmd, request, 0);
1da177e4
LT		 2951 up(&state->lock_sema);
2952 if (status == 0) {
2953 /* Note: we always want to sleep here! */
2954 request->fl_flags |= FL_SLEEP;
2955 if (do_vfs_lock(request->fl_file, request) < 0)
2956 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
2957 }
2958 up_read(&clp->cl_sem);
2959 return status;
2960}
2961
2962static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2963{
2964 struct nfs4_exception exception = { };
2965 int err;
2966
2967 do {
2968 err = nfs4_handle_exception(NFS_SERVER(state->inode),
2969 _nfs4_proc_setlk(state, cmd, request),
2970 &exception);
2971 } while (exception.retry);
2972 return err;
2973}
2974
2975static int
2976nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
2977{
2978 struct nfs_open_context *ctx;
2979 struct nfs4_state *state;
2980 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
2981 int status;
2982
2983 /* verify open state */
2984 ctx = (struct nfs_open_context *)filp->private_data;
2985 state = ctx->state;
2986
2987 if (request->fl_start < 0 || request->fl_end < 0)
2988 return -EINVAL;
2989
2990 if (IS_GETLK(cmd))
2991 return nfs4_proc_getlk(state, F_GETLK, request);
2992
2993 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
2994 return -EINVAL;
2995
2996 if (request->fl_type == F_UNLCK)
2997 return nfs4_proc_unlck(state, cmd, request);
2998
2999 do {
3000 status = nfs4_proc_setlk(state, cmd, request);
3001 if ((status != -EAGAIN) || IS_SETLK(cmd))
3002 break;
3003 timeout = nfs4_set_lock_task_retry(timeout);
3004 status = -ERESTARTSYS;
3005 if (signalled())
3006 break;
3007 } while(status < 0);
1da177e4
LT		 3008 return status;
3009}
3010
6b3b5496 3011
aa1870af
BF		 3012#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3013
6b3b5496
BF		 3014int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3015 size_t buflen, int flags)
3016{
4b580ee3
BF		 3017 struct inode *inode = dentry->d_inode;
3018
3019 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3020 return -EOPNOTSUPP;
3021
3022 if (!S_ISREG(inode->i_mode) &&
3023 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3024 return -EPERM;
3025
3026 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 3027}
3028
3029/* The getxattr man page suggests returning -ENODATA for unknown attributes,
3030 * and that's what we'll do for e.g. user attributes that haven't been set.
3031 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3032 * attributes in kernel-managed attribute namespaces. */
3033ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3034 size_t buflen)
3035{
aa1870af
BF		 3036 struct inode *inode = dentry->d_inode;
3037
3038 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3039 return -EOPNOTSUPP;
3040
3041 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 3042}
3043
3044ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3045{
aa1870af 3046 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496
BF		 3047
3048 if (buf && buflen < len)
3049 return -ERANGE;
3050 if (buf)
aa1870af
BF		 3051 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3052 return len;
6b3b5496
BF		 3053}
3054
1da177e4
LT		 3055struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3056 .recover_open = nfs4_open_reclaim,
3057 .recover_lock = nfs4_lock_reclaim,
3058};
3059
3060struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3061 .recover_open = nfs4_open_expired,
3062 .recover_lock = nfs4_lock_expired,
3063};
3064
6b3b5496
BF		 3065static struct inode_operations nfs4_file_inode_operations = {
3066 .permission = nfs_permission,
3067 .getattr = nfs_getattr,
3068 .setattr = nfs_setattr,
3069 .getxattr = nfs4_getxattr,
3070 .setxattr = nfs4_setxattr,
3071 .listxattr = nfs4_listxattr,
3072};
3073
1da177e4
LT		 3074struct nfs_rpc_ops nfs_v4_clientops = {
3075 .version = 4, /* protocol version */
3076 .dentry_ops = &nfs4_dentry_operations,
3077 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 3078 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 3079 .getroot = nfs4_proc_get_root,
3080 .getattr = nfs4_proc_getattr,
3081 .setattr = nfs4_proc_setattr,
3082 .lookup = nfs4_proc_lookup,
3083 .access = nfs4_proc_access,
3084 .readlink = nfs4_proc_readlink,
3085 .read = nfs4_proc_read,
3086 .write = nfs4_proc_write,
3087 .commit = nfs4_proc_commit,
3088 .create = nfs4_proc_create,
3089 .remove = nfs4_proc_remove,
3090 .unlink_setup = nfs4_proc_unlink_setup,
3091 .unlink_done = nfs4_proc_unlink_done,
3092 .rename = nfs4_proc_rename,
3093 .link = nfs4_proc_link,
3094 .symlink = nfs4_proc_symlink,
3095 .mkdir = nfs4_proc_mkdir,
3096 .rmdir = nfs4_proc_remove,
3097 .readdir = nfs4_proc_readdir,
3098 .mknod = nfs4_proc_mknod,
3099 .statfs = nfs4_proc_statfs,
3100 .fsinfo = nfs4_proc_fsinfo,
3101 .pathconf = nfs4_proc_pathconf,
3102 .decode_dirent = nfs4_decode_dirent,
3103 .read_setup = nfs4_proc_read_setup,
3104 .write_setup = nfs4_proc_write_setup,
3105 .commit_setup = nfs4_proc_commit_setup,
3106 .file_open = nfs4_proc_file_open,
3107 .file_release = nfs4_proc_file_release,
3108 .lock = nfs4_proc_lock,
e50a1c2e 3109 .clear_acl_cache = nfs4_zap_acl_attr,
1da177e4
LT		 3110};
3111
3112/*
3113 * Local variables:
3114 * c-basic-offset: 8
3115 * End:
3116 */
Linux 6.x block layer and io_uring tree(s)