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NFSv4.1: Don't call nfs4_schedule_state_recovery() unnecessarily
[net-next-2.6.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>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
1da177e4 47#include <linux/namei.h>
02a913a7 48#include <linux/mount.h>
99fe60d0 49#include <linux/module.h>
5a0ffe54 50#include <linux/sunrpc/bc_xprt.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
fc931582 56#include "callback.h"
1da177e4
LT		 57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
2066fe89 60#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
a78cb57a
TM		 63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 67static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 68static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 69static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 70static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 72
1da177e4 73/* Prevent leaks of NFSv4 errors into userland */
46f72f57 74static int nfs4_map_errors(int err)
1da177e4 75{
52567b03
TM		 76 if (err >= -1000)
77 return err;
78 switch (err) {
79 case -NFS4ERR_RESOURCE:
80 return -EREMOTEIO;
81 default:
1da177e4 82 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 83 __func__, -err);
52567b03 84 break;
1da177e4 85 }
52567b03 86 return -EIO;
1da177e4
LT		 87}
88
89/*
90 * This is our standard bitmap for GETATTR requests.
91 */
92const u32 nfs4_fattr_bitmap[2] = {
93 FATTR4_WORD0_TYPE
94 | FATTR4_WORD0_CHANGE
95 | FATTR4_WORD0_SIZE
96 | FATTR4_WORD0_FSID
97 | FATTR4_WORD0_FILEID,
98 FATTR4_WORD1_MODE
99 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
107};
108
109const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
116};
117
4ce79717 118const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 119 FATTR4_WORD0_MAXLINK
120 | FATTR4_WORD0_MAXNAME,
121 0
122};
123
124const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
128 0
129};
130
830b8e33
MN		 131const u32 nfs4_fs_locations_bitmap[2] = {
132 FATTR4_WORD0_TYPE
133 | FATTR4_WORD0_CHANGE
134 | FATTR4_WORD0_SIZE
135 | FATTR4_WORD0_FSID
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
138 FATTR4_WORD1_MODE
139 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
148};
149
bc4785cd 150static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 151 struct nfs4_readdir_arg *readdir)
152{
0dbb4c67 153 __be32 *start, *p;
1da177e4
LT		 154
155 BUG_ON(readdir->count < 80);
156 if (cookie > 2) {
b7ef1956 157 readdir->cookie = cookie;
1da177e4
LT		 158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
159 return;
160 }
161
162 readdir->cookie = 0;
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
164 if (cookie == 2)
165 return;
166
167 /*
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
172 * instead of 1 or 2.
173 */
0dbb4c67 174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 175
176 if (cookie == 0) {
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
182 p++;
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
4e769b93 186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 187 }
188
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
194 p++;
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
4e769b93 198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 199
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
203}
204
65de872e
TM		 205static int nfs4_wait_clnt_recover(struct nfs_client *clp)
206{
207 int res;
208
209 might_sleep();
210
e005e804 211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 212 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 213 return res;
214}
215
216static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
217{
218 int res = 0;
219
220 might_sleep();
221
222 if (*timeout <= 0)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
228 res = -ERESTARTSYS;
229 *timeout <<= 1;
230 return res;
231}
232
233/* This is the error handling routine for processes that are allowed
234 * to sleep.
235 */
236static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237{
238 struct nfs_client *clp = server->nfs_client;
9e33bed5 239 struct nfs4_state *state = exception->state;
65de872e
TM		 240 int ret = errorcode;
241
242 exception->retry = 0;
243 switch(errorcode) {
244 case 0:
245 return 0;
9e33bed5
TM		 246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
249 if (state == NULL)
250 break;
251 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 252 case -NFS4ERR_STALE_CLIENTID:
253 case -NFS4ERR_STALE_STATEID:
254 case -NFS4ERR_EXPIRED:
255 nfs4_schedule_state_recovery(clp);
256 ret = nfs4_wait_clnt_recover(clp);
257 if (ret == 0)
258 exception->retry = 1;
259 break;
03391693 260#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 261 case -NFS4ERR_BADSESSION:
262 case -NFS4ERR_BADSLOT:
263 case -NFS4ERR_BAD_HIGH_SLOT:
264 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
265 case -NFS4ERR_DEADSESSION:
266 case -NFS4ERR_SEQ_FALSE_RETRY:
267 case -NFS4ERR_SEQ_MISORDERED:
268 dprintk("%s ERROR: %d Reset session\n", __func__,
269 errorcode);
0b9e2d41 270 nfs4_schedule_state_recovery(clp);
4745e315 271 exception->retry = 1;
b9179237 272 break;
03391693 273#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 274 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 275 if (exception->timeout > HZ) {
276 /* We have retried a decent amount, time to
277 * fail
278 */
279 ret = -EBUSY;
280 break;
281 }
65de872e
TM		 282 case -NFS4ERR_GRACE:
283 case -NFS4ERR_DELAY:
284 ret = nfs4_delay(server->client, &exception->timeout);
285 if (ret != 0)
286 break;
287 case -NFS4ERR_OLD_STATEID:
288 exception->retry = 1;
289 }
290 /* We failed to handle the error */
291 return nfs4_map_errors(ret);
292}
293
294
26e976a8 295static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 296{
7539bbab 297 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 298 spin_lock(&clp->cl_lock);
299 if (time_before(clp->cl_last_renewal,timestamp))
300 clp->cl_last_renewal = timestamp;
301 spin_unlock(&clp->cl_lock);
302}
303
cccef3b9
AA		 304#if defined(CONFIG_NFS_V4_1)
305
e2c4ab3c
AA		 306/*
307 * nfs4_free_slot - free a slot and efficiently update slot table.
308 *
309 * freeing a slot is trivially done by clearing its respective bit
310 * in the bitmap.
311 * If the freed slotid equals highest_used_slotid we want to update it
312 * so that the server would be able to size down the slot table if needed,
313 * otherwise we know that the highest_used_slotid is still in use.
314 * When updating highest_used_slotid there may be "holes" in the bitmap
315 * so we need to scan down from highest_used_slotid to 0 looking for the now
316 * highest slotid in use.
317 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 318 *
319 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 320 */
321static void
322nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
323{
324 int slotid = free_slotid;
325
e2c4ab3c
AA		 326 /* clear used bit in bitmap */
327 __clear_bit(slotid, tbl->used_slots);
328
329 /* update highest_used_slotid when it is freed */
330 if (slotid == tbl->highest_used_slotid) {
331 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 332 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 333 tbl->highest_used_slotid = slotid;
334 else
335 tbl->highest_used_slotid = -1;
336 }
e2c4ab3c
AA		 337 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
338 free_slotid, tbl->highest_used_slotid);
339}
340
3bfb0fc5
AB		 341/*
342 * Signal state manager thread if session is drained
343 */
344static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
345{
689cf5c1
AB		 346 struct rpc_task *task;
347
3bfb0fc5 348 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 349 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
350 if (task)
351 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 352 return;
353 }
354
355 if (ses->fc_slot_table.highest_used_slotid != -1)
356 return;
357
358 dprintk("%s COMPLETE: Session Drained\n", __func__);
359 complete(&ses->complete);
360}
361
d61e612a 362static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 363 struct nfs4_sequence_res *res)
364{
365 struct nfs4_slot_table *tbl;
366
13615871
AA		 367 tbl = &clp->cl_session->fc_slot_table;
368 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 369 /* just wake up the next guy waiting since
370 * we may have not consumed a slot after all */
691daf3b 371 dprintk("%s: No slot\n", __func__);
35dc1d74 372 return;
13615871 373 }
ea028ac9 374
35dc1d74
TM		 375 spin_lock(&tbl->slot_tbl_lock);
376 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 377 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 378 spin_unlock(&tbl->slot_tbl_lock);
379 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 380}
381
b0df806c
AA		 382static void nfs41_sequence_done(struct nfs_client *clp,
383 struct nfs4_sequence_res *res,
384 int rpc_status)
385{
386 unsigned long timestamp;
387 struct nfs4_slot_table *tbl;
388 struct nfs4_slot *slot;
389
390 /*
391 * sr_status remains 1 if an RPC level error occurred. The server
392 * may or may not have processed the sequence operation..
393 * Proceed as if the server received and processed the sequence
394 * operation.
395 */
396 if (res->sr_status == 1)
397 res->sr_status = NFS_OK;
398
399 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
400 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
401 goto out;
402
691daf3b 403 /* Check the SEQUENCE operation status */
b0df806c 404 if (res->sr_status == 0) {
691daf3b
AA		 405 tbl = &clp->cl_session->fc_slot_table;
406 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 407 /* Update the slot's sequence and clientid lease timer */
408 ++slot->seq_nr;
409 timestamp = res->sr_renewal_time;
410 spin_lock(&clp->cl_lock);
411 if (time_before(clp->cl_last_renewal, timestamp))
412 clp->cl_last_renewal = timestamp;
413 spin_unlock(&clp->cl_lock);
0629e370
AB		 414 /* Check sequence flags */
415 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 416 }
417out:
418 /* The session may be reset by one of the error handlers. */
419 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
420 nfs41_sequence_free_slot(clp, res);
421}
422
510b8175
BH		 423/*
424 * nfs4_find_slot - efficiently look for a free slot
425 *
426 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
427 * If found, we mark the slot as used, update the highest_used_slotid,
428 * and respectively set up the sequence operation args.
429 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 430 *
431 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 432 */
433static u8
40ead580 434nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 435{
436 int slotid;
437 u8 ret_id = NFS4_MAX_SLOT_TABLE;
438 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
439
510b8175
BH		 440 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
441 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
442 tbl->max_slots);
443 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
444 if (slotid >= tbl->max_slots)
445 goto out;
446 __set_bit(slotid, tbl->used_slots);
447 if (slotid > tbl->highest_used_slotid)
448 tbl->highest_used_slotid = slotid;
449 ret_id = slotid;
450out:
451 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
452 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 453 return ret_id;
454}
455
ce5039c1
AA		 456static int nfs41_setup_sequence(struct nfs4_session *session,
457 struct nfs4_sequence_args *args,
458 struct nfs4_sequence_res *res,
459 int cache_reply,
460 struct rpc_task *task)
461{
fbcd4abc
AA		 462 struct nfs4_slot *slot;
463 struct nfs4_slot_table *tbl;
464 u8 slotid;
465
466 dprintk("--> %s\n", __func__);
ce5039c1
AA		 467 /* slot already allocated? */
468 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
469 return 0;
470
471 memset(res, 0, sizeof(*res));
472 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 473 tbl = &session->fc_slot_table;
474
475 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 476 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
477 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 478 /*
479 * The state manager will wait until the slot table is empty.
480 * Schedule the reset thread
481 */
05f0d236 482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 483 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 484 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 485 return -EAGAIN;
b069d94a
AA		 486 }
487
689cf5c1
AB		 488 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
489 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
490 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
491 spin_unlock(&tbl->slot_tbl_lock);
492 dprintk("%s enforce FIFO order\n", __func__);
493 return -EAGAIN;
494 }
495
40ead580 496 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 497 if (slotid == NFS4_MAX_SLOT_TABLE) {
498 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
499 spin_unlock(&tbl->slot_tbl_lock);
500 dprintk("<-- %s: no free slots\n", __func__);
501 return -EAGAIN;
502 }
503 spin_unlock(&tbl->slot_tbl_lock);
504
689cf5c1 505 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 506 slot = tbl->slots + slotid;
99fe60d0 507 args->sa_session = session;
fbcd4abc
AA		 508 args->sa_slotid = slotid;
509 args->sa_cache_this = cache_reply;
510
511 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
512
99fe60d0 513 res->sr_session = session;
fbcd4abc
AA		 514 res->sr_slotid = slotid;
515 res->sr_renewal_time = jiffies;
516 /*
517 * sr_status is only set in decode_sequence, and so will remain
518 * set to 1 if an rpc level failure occurs.
519 */
520 res->sr_status = 1;
ce5039c1
AA		 521 return 0;
522}
523
524int nfs4_setup_sequence(struct nfs_client *clp,
525 struct nfs4_sequence_args *args,
526 struct nfs4_sequence_res *res,
527 int cache_reply,
528 struct rpc_task *task)
529{
530 int ret = 0;
531
532 dprintk("--> %s clp %p session %p sr_slotid %d\n",
533 __func__, clp, clp->cl_session, res->sr_slotid);
534
535 if (!nfs4_has_session(clp))
536 goto out;
537 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
538 task);
2628eddf 539 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 540 /* terminate rpc task */
541 task->tk_status = ret;
542 task->tk_action = NULL;
543 }
544out:
545 dprintk("<-- %s status=%d\n", __func__, ret);
546 return ret;
547}
548
549struct nfs41_call_sync_data {
550 struct nfs_client *clp;
551 struct nfs4_sequence_args *seq_args;
552 struct nfs4_sequence_res *seq_res;
553 int cache_reply;
554};
555
556static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
557{
558 struct nfs41_call_sync_data *data = calldata;
559
560 dprintk("--> %s data->clp->cl_session %p\n", __func__,
561 data->clp->cl_session);
562 if (nfs4_setup_sequence(data->clp, data->seq_args,
563 data->seq_res, data->cache_reply, task))
564 return;
565 rpc_call_start(task);
566}
567
b257957e
AB		 568static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
569{
570 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
571 nfs41_call_sync_prepare(task, calldata);
572}
573
69ab40c4
AA		 574static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
575{
576 struct nfs41_call_sync_data *data = calldata;
577
578 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 579}
580
ce5039c1
AA		 581struct rpc_call_ops nfs41_call_sync_ops = {
582 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 583 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 584};
585
b257957e
AB		 586struct rpc_call_ops nfs41_call_priv_sync_ops = {
587 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
588 .rpc_call_done = nfs41_call_sync_done,
589};
590
ce5039c1
AA		 591static int nfs4_call_sync_sequence(struct nfs_client *clp,
592 struct rpc_clnt *clnt,
593 struct rpc_message *msg,
594 struct nfs4_sequence_args *args,
595 struct nfs4_sequence_res *res,
b257957e
AB		 596 int cache_reply,
597 int privileged)
ce5039c1
AA		 598{
599 int ret;
600 struct rpc_task *task;
601 struct nfs41_call_sync_data data = {
602 .clp = clp,
603 .seq_args = args,
604 .seq_res = res,
605 .cache_reply = cache_reply,
606 };
607 struct rpc_task_setup task_setup = {
608 .rpc_client = clnt,
609 .rpc_message = msg,
610 .callback_ops = &nfs41_call_sync_ops,
611 .callback_data = &data
612 };
613
614 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 615 if (privileged)
616 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 617 task = rpc_run_task(&task_setup);
618 if (IS_ERR(task))
619 ret = PTR_ERR(task);
620 else {
621 ret = task->tk_status;
622 rpc_put_task(task);
623 }
624 return ret;
625}
626
cccef3b9
AA		 627int _nfs4_call_sync_session(struct nfs_server *server,
628 struct rpc_message *msg,
629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
631 int cache_reply)
632{
ce5039c1 633 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 634 msg, args, res, cache_reply, 0);
cccef3b9
AA		 635}
636
637#endif /* CONFIG_NFS_V4_1 */
638
639int _nfs4_call_sync(struct nfs_server *server,
640 struct rpc_message *msg,
641 struct nfs4_sequence_args *args,
642 struct nfs4_sequence_res *res,
643 int cache_reply)
644{
f3752975 645 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 646 return rpc_call_sync(server->client, msg, 0);
647}
648
649#define nfs4_call_sync(server, msg, args, res, cache_reply) \
650 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
651 &(res)->seq_res, (cache_reply))
652
b0df806c
AA		 653static void nfs4_sequence_done(const struct nfs_server *server,
654 struct nfs4_sequence_res *res, int rpc_status)
655{
656#ifdef CONFIG_NFS_V4_1
657 if (nfs4_has_session(server->nfs_client))
658 nfs41_sequence_done(server->nfs_client, res, rpc_status);
659#endif /* CONFIG_NFS_V4_1 */
660}
661
38478b24 662static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 663{
38478b24 664 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 665
38478b24 666 spin_lock(&dir->i_lock);
40d24704
TM		 667 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
668 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 669 nfs_force_lookup_revalidate(dir);
40d24704 670 nfsi->change_attr = cinfo->after;
38478b24 671 spin_unlock(&dir->i_lock);
1da177e4
LT		 672}
673
e56e0b78 674struct nfs4_opendata {
c6d00e63 675 struct kref kref;
e56e0b78
TM		 676 struct nfs_openargs o_arg;
677 struct nfs_openres o_res;
cdd4e68b
TM		 678 struct nfs_open_confirmargs c_arg;
679 struct nfs_open_confirmres c_res;
e56e0b78
TM		 680 struct nfs_fattr f_attr;
681 struct nfs_fattr dir_attr;
ad389da7 682 struct path path;
e56e0b78
TM		 683 struct dentry *dir;
684 struct nfs4_state_owner *owner;
aac00a8d 685 struct nfs4_state *state;
e56e0b78 686 struct iattr attrs;
26e976a8 687 unsigned long timestamp;
3e309914 688 unsigned int rpc_done : 1;
24ac23ab
TM		 689 int rpc_status;
690 int cancelled;
e56e0b78
TM		 691};
692
2ced46c2
TM		 693
694static void nfs4_init_opendata_res(struct nfs4_opendata *p)
695{
696 p->o_res.f_attr = &p->f_attr;
697 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 698 p->o_res.seqid = p->o_arg.seqid;
699 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 700 p->o_res.server = p->o_arg.server;
701 nfs_fattr_init(&p->f_attr);
702 nfs_fattr_init(&p->dir_attr);
578e4585 703 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 704}
705
ad389da7 706static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 707 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 708 const struct iattr *attrs)
709{
ad389da7 710 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 711 struct inode *dir = parent->d_inode;
712 struct nfs_server *server = NFS_SERVER(dir);
713 struct nfs4_opendata *p;
714
715 p = kzalloc(sizeof(*p), GFP_KERNEL);
716 if (p == NULL)
717 goto err;
718 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
719 if (p->o_arg.seqid == NULL)
720 goto err_free;
ad389da7
TM		 721 p->path.mnt = mntget(path->mnt);
722 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 723 p->dir = parent;
724 p->owner = sp;
725 atomic_inc(&sp->so_count);
726 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 727 p->o_arg.open_flags = flags;
728 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 729 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 730 p->o_arg.id = sp->so_owner_id.id;
ad389da7 731 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 732 p->o_arg.server = server;
733 p->o_arg.bitmask = server->attr_bitmask;
734 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 735 if (flags & O_EXCL) {
4882ef72
AB		 736 if (nfs4_has_persistent_session(server->nfs_client)) {
737 /* GUARDED */
738 p->o_arg.u.attrs = &p->attrs;
739 memcpy(&p->attrs, attrs, sizeof(p->attrs));
740 } else { /* EXCLUSIVE4_1 */
741 u32 *s = (u32 *) p->o_arg.u.verifier.data;
742 s[0] = jiffies;
743 s[1] = current->pid;
744 }
e56e0b78
TM		 745 } else if (flags & O_CREAT) {
746 p->o_arg.u.attrs = &p->attrs;
747 memcpy(&p->attrs, attrs, sizeof(p->attrs));
748 }
cdd4e68b
TM		 749 p->c_arg.fh = &p->o_res.fh;
750 p->c_arg.stateid = &p->o_res.stateid;
751 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 752 nfs4_init_opendata_res(p);
c6d00e63 753 kref_init(&p->kref);
e56e0b78
TM		 754 return p;
755err_free:
756 kfree(p);
757err:
758 dput(parent);
759 return NULL;
760}
761
c6d00e63 762static void nfs4_opendata_free(struct kref *kref)
e56e0b78 763{
c6d00e63
TM		 764 struct nfs4_opendata *p = container_of(kref,
765 struct nfs4_opendata, kref);
766
767 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 768 if (p->state != NULL)
769 nfs4_put_open_state(p->state);
c6d00e63
TM		 770 nfs4_put_state_owner(p->owner);
771 dput(p->dir);
31f31db1 772 path_put(&p->path);
c6d00e63
TM		 773 kfree(p);
774}
775
776static void nfs4_opendata_put(struct nfs4_opendata *p)
777{
778 if (p != NULL)
779 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 780}
781
06f814a3
TM		 782static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
783{
06f814a3
TM		 784 int ret;
785
06f814a3 786 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 787 return ret;
788}
789
dc0b027d 790static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 791{
792 int ret = 0;
dc0b027d
TM		 793
794 if (open_mode & O_EXCL)
795 goto out;
796 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 797 case FMODE_READ:
88069f77
TM		 798 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
799 && state->n_rdonly != 0;
6ee41268
TM		 800 break;
801 case FMODE_WRITE:
88069f77
TM		 802 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
803 && state->n_wronly != 0;
6ee41268
TM		 804 break;
805 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 806 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
807 && state->n_rdwr != 0;
6ee41268 808 }
dc0b027d 809out:
6ee41268
TM		 810 return ret;
811}
812
dc0b027d 813static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 814{
dc0b027d 815 if ((delegation->type & fmode) != fmode)
aac00a8d 816 return 0;
15c831bf 817 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 818 return 0;
b7391f44 819 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 820 return 1;
821}
822
dc0b027d 823static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 824{
dc0b027d 825 switch (fmode) {
e7616923
TM		 826 case FMODE_WRITE:
827 state->n_wronly++;
828 break;
829 case FMODE_READ:
830 state->n_rdonly++;
831 break;
832 case FMODE_READ|FMODE_WRITE:
833 state->n_rdwr++;
834 }
dc0b027d 835 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 836}
837
dc0b027d 838static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 839{
840 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
841 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
842 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 843 switch (fmode) {
003707c7
TM		 844 case FMODE_READ:
845 set_bit(NFS_O_RDONLY_STATE, &state->flags);
846 break;
847 case FMODE_WRITE:
848 set_bit(NFS_O_WRONLY_STATE, &state->flags);
849 break;
850 case FMODE_READ|FMODE_WRITE:
851 set_bit(NFS_O_RDWR_STATE, &state->flags);
852 }
e7616923
TM		 853}
854
dc0b027d 855static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 856{
8bda4e4c 857 write_seqlock(&state->seqlock);
dc0b027d 858 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 859 write_sequnlock(&state->seqlock);
003707c7
TM		 860}
861
dc0b027d 862static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 863{
8bda4e4c
TM		 864 /*
865 * Protect the call to nfs4_state_set_mode_locked and
866 * serialise the stateid update
867 */
868 write_seqlock(&state->seqlock);
003707c7
TM		 869 if (deleg_stateid != NULL) {
870 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
871 set_bit(NFS_DELEGATED_STATE, &state->flags);
872 }
873 if (open_stateid != NULL)
dc0b027d 874 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 875 write_sequnlock(&state->seqlock);
876 spin_lock(&state->owner->so_lock);
dc0b027d 877 update_open_stateflags(state, fmode);
ec073428 878 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 879}
880
dc0b027d 881static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 882{
883 struct nfs_inode *nfsi = NFS_I(state->inode);
884 struct nfs_delegation *deleg_cur;
885 int ret = 0;
886
dc0b027d 887 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 888
889 rcu_read_lock();
890 deleg_cur = rcu_dereference(nfsi->delegation);
891 if (deleg_cur == NULL)
892 goto no_delegation;
893
894 spin_lock(&deleg_cur->lock);
895 if (nfsi->delegation != deleg_cur ||
dc0b027d 896 (deleg_cur->type & fmode) != fmode)
34310430
TM		 897 goto no_delegation_unlock;
898
899 if (delegation == NULL)
900 delegation = &deleg_cur->stateid;
901 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
902 goto no_delegation_unlock;
903
b7391f44 904 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 905 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 906 ret = 1;
907no_delegation_unlock:
908 spin_unlock(&deleg_cur->lock);
909no_delegation:
910 rcu_read_unlock();
911
912 if (!ret && open_stateid != NULL) {
dc0b027d 913 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 914 ret = 1;
915 }
916
917 return ret;
918}
919
920
dc0b027d 921static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 922{
923 struct nfs_delegation *delegation;
924
925 rcu_read_lock();
926 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 927 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 928 rcu_read_unlock();
929 return;
930 }
931 rcu_read_unlock();
932 nfs_inode_return_delegation(inode);
933}
934
6ee41268 935static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 936{
937 struct nfs4_state *state = opendata->state;
938 struct nfs_inode *nfsi = NFS_I(state->inode);
939 struct nfs_delegation *delegation;
dc0b027d
TM		 940 int open_mode = opendata->o_arg.open_flags & O_EXCL;
941 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 942 nfs4_stateid stateid;
943 int ret = -EAGAIN;
944
aac00a8d 945 for (;;) {
dc0b027d 946 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 947 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 948 if (can_open_cached(state, fmode, open_mode)) {
949 update_open_stateflags(state, fmode);
6ee41268 950 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 951 goto out_return_state;
952 }
953 spin_unlock(&state->owner->so_lock);
954 }
34310430
TM		 955 rcu_read_lock();
956 delegation = rcu_dereference(nfsi->delegation);
957 if (delegation == NULL ||
dc0b027d 958 !can_open_delegated(delegation, fmode)) {
34310430 959 rcu_read_unlock();
aac00a8d 960 break;
34310430 961 }
aac00a8d
TM		 962 /* Save the delegation */
963 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
964 rcu_read_unlock();
af22f94a 965 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 966 if (ret != 0)
967 goto out;
968 ret = -EAGAIN;
34310430
TM		 969
970 /* Try to update the stateid using the delegation */
dc0b027d 971 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 972 goto out_return_state;
aac00a8d 973 }
aac00a8d
TM		 974out:
975 return ERR_PTR(ret);
976out_return_state:
977 atomic_inc(&state->count);
978 return state;
979}
980
24ac23ab
TM		 981static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
982{
983 struct inode *inode;
984 struct nfs4_state *state = NULL;
003707c7 985 struct nfs_delegation *delegation;
1b370bc2 986 int ret;
24ac23ab 987
aac00a8d 988 if (!data->rpc_done) {
6ee41268 989 state = nfs4_try_open_cached(data);
aac00a8d
TM		 990 goto out;
991 }
992
1b370bc2 993 ret = -EAGAIN;
24ac23ab 994 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 995 goto err;
24ac23ab 996 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 997 ret = PTR_ERR(inode);
03f28e3a 998 if (IS_ERR(inode))
1b370bc2
TM		 999 goto err;
1000 ret = -ENOMEM;
24ac23ab
TM		 1001 state = nfs4_get_open_state(inode, data->owner);
1002 if (state == NULL)
1b370bc2 1003 goto err_put_inode;
549d6ed5 1004 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1005 int delegation_flags = 0;
1006
003707c7
TM		 1007 rcu_read_lock();
1008 delegation = rcu_dereference(NFS_I(inode)->delegation);
1009 if (delegation)
1010 delegation_flags = delegation->flags;
1011 rcu_read_unlock();
15c831bf 1012 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1013 nfs_inode_set_delegation(state->inode,
1014 data->owner->so_cred,
1015 &data->o_res);
1016 else
1017 nfs_inode_reclaim_delegation(state->inode,
1018 data->owner->so_cred,
1019 &data->o_res);
1020 }
34310430
TM		 1021
1022 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1023 data->o_arg.fmode);
24ac23ab 1024 iput(inode);
aac00a8d 1025out:
24ac23ab 1026 return state;
1b370bc2
TM		 1027err_put_inode:
1028 iput(inode);
1029err:
1030 return ERR_PTR(ret);
24ac23ab
TM		 1031}
1032
864472e9
TM		 1033static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1034{
1035 struct nfs_inode *nfsi = NFS_I(state->inode);
1036 struct nfs_open_context *ctx;
1037
1038 spin_lock(&state->inode->i_lock);
1039 list_for_each_entry(ctx, &nfsi->open_files, list) {
1040 if (ctx->state != state)
1041 continue;
1042 get_nfs_open_context(ctx);
1043 spin_unlock(&state->inode->i_lock);
1044 return ctx;
1045 }
1046 spin_unlock(&state->inode->i_lock);
1047 return ERR_PTR(-ENOENT);
1048}
1049
6f220ed5
TM		 1050static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1051{
1052 struct nfs4_opendata *opendata;
1053
dc0b027d 1054 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1055 if (opendata == NULL)
1056 return ERR_PTR(-ENOMEM);
1057 opendata->state = state;
1058 atomic_inc(&state->count);
1059 return opendata;
1060}
1061
dc0b027d 1062static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1063{
2ced46c2 1064 struct nfs4_state *newstate;
864472e9
TM		 1065 int ret;
1066
dc0b027d
TM		 1067 opendata->o_arg.open_flags = 0;
1068 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1069 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1070 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1071 nfs4_init_opendata_res(opendata);
b257957e 1072 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1073 if (ret != 0)
1074 return ret;
2ced46c2 1075 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1076 if (IS_ERR(newstate))
1077 return PTR_ERR(newstate);
dc0b027d 1078 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1079 *res = newstate;
864472e9
TM		 1080 return 0;
1081}
1082
1083static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1084{
864472e9 1085 struct nfs4_state *newstate;
864472e9
TM		 1086 int ret;
1087
1088 /* memory barrier prior to reading state->n_* */
2ced46c2 1089 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1090 smp_rmb();
1091 if (state->n_rdwr != 0) {
2ced46c2 1092 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1093 if (ret != 0)
1094 return ret;
2ced46c2
TM		 1095 if (newstate != state)
1096 return -ESTALE;
864472e9
TM		 1097 }
1098 if (state->n_wronly != 0) {
2ced46c2 1099 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1100 if (ret != 0)
1101 return ret;
2ced46c2
TM		 1102 if (newstate != state)
1103 return -ESTALE;
864472e9
TM		 1104 }
1105 if (state->n_rdonly != 0) {
2ced46c2 1106 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1107 if (ret != 0)
1108 return ret;
2ced46c2
TM		 1109 if (newstate != state)
1110 return -ESTALE;
864472e9 1111 }
1ac7e2fd
TM		 1112 /*
1113 * We may have performed cached opens for all three recoveries.
1114 * Check if we need to update the current stateid.
1115 */
1116 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1117 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1118 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1119 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1120 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1121 write_sequnlock(&state->seqlock);
1ac7e2fd 1122 }
864472e9
TM		 1123 return 0;
1124}
1125
1da177e4
LT		 1126/*
1127 * OPEN_RECLAIM:
1128 * reclaim state on the server after a reboot.
1da177e4 1129 */
539cd03a 1130static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1131{
1ac7e2fd 1132 struct nfs_delegation *delegation;
864472e9 1133 struct nfs4_opendata *opendata;
dc0b027d 1134 fmode_t delegation_type = 0;
1da177e4
LT		 1135 int status;
1136
6f220ed5
TM		 1137 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1138 if (IS_ERR(opendata))
1139 return PTR_ERR(opendata);
864472e9
TM		 1140 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1141 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1142 rcu_read_lock();
1143 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1144 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1145 delegation_type = delegation->type;
1ac7e2fd 1146 rcu_read_unlock();
864472e9
TM		 1147 opendata->o_arg.u.delegation_type = delegation_type;
1148 status = nfs4_open_recover(opendata, state);
c6d00e63 1149 nfs4_opendata_put(opendata);
1da177e4
LT		 1150 return status;
1151}
1152
539cd03a 1153static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1154{
1155 struct nfs_server *server = NFS_SERVER(state->inode);
1156 struct nfs4_exception exception = { };
1157 int err;
1158 do {
539cd03a 1159 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1160 if (err != -NFS4ERR_DELAY)
1161 break;
1162 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1163 } while (exception.retry);
1164 return err;
1165}
1166
864472e9
TM		 1167static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1168{
1169 struct nfs_open_context *ctx;
1170 int ret;
1171
1172 ctx = nfs4_state_find_open_context(state);
1173 if (IS_ERR(ctx))
1174 return PTR_ERR(ctx);
539cd03a 1175 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1176 put_nfs_open_context(ctx);
1177 return ret;
1178}
1179
13437e12 1180static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1181{
e56e0b78 1182 struct nfs4_opendata *opendata;
864472e9 1183 int ret;
1da177e4 1184
6f220ed5
TM		 1185 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1186 if (IS_ERR(opendata))
1187 return PTR_ERR(opendata);
e56e0b78 1188 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1189 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1190 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1191 ret = nfs4_open_recover(opendata, state);
c6d00e63 1192 nfs4_opendata_put(opendata);
864472e9 1193 return ret;
1da177e4
LT		 1194}
1195
13437e12 1196int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1197{
1198 struct nfs4_exception exception = { };
539cd03a 1199 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1200 int err;
1201 do {
13437e12 1202 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1203 switch (err) {
1204 case 0:
965b5d67
TM		 1205 case -ENOENT:
1206 case -ESTALE:
1207 goto out;
bcfa49f6
RL		 1208 case -NFS4ERR_BADSESSION:
1209 case -NFS4ERR_BADSLOT:
1210 case -NFS4ERR_BAD_HIGH_SLOT:
1211 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1212 case -NFS4ERR_DEADSESSION:
1213 nfs4_schedule_state_recovery(
1214 server->nfs_client);
1215 goto out;
1da177e4
LT		 1216 case -NFS4ERR_STALE_CLIENTID:
1217 case -NFS4ERR_STALE_STATEID:
1218 case -NFS4ERR_EXPIRED:
1219 /* Don't recall a delegation if it was lost */
7539bbab 1220 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1221 goto out;
1222 case -ERESTARTSYS:
1223 /*
1224 * The show must go on: exit, but mark the
1225 * stateid as needing recovery.
1226 */
1227 case -NFS4ERR_ADMIN_REVOKED:
1228 case -NFS4ERR_BAD_STATEID:
1229 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1230 case -ENOMEM:
1231 err = 0;
1232 goto out;
1da177e4
LT		 1233 }
1234 err = nfs4_handle_exception(server, err, &exception);
1235 } while (exception.retry);
965b5d67 1236out:
1da177e4
LT		 1237 return err;
1238}
1239
cdd4e68b
TM		 1240static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1241{
1242 struct nfs4_opendata *data = calldata;
1243
1244 data->rpc_status = task->tk_status;
1245 if (RPC_ASSASSINATED(task))
1246 return;
26e976a8 1247 if (data->rpc_status == 0) {
cdd4e68b
TM		 1248 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1249 sizeof(data->o_res.stateid.data));
bb22629e 1250 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1251 renew_lease(data->o_res.server, data->timestamp);
3e309914 1252 data->rpc_done = 1;
26e976a8 1253 }
cdd4e68b
TM		 1254}
1255
1256static void nfs4_open_confirm_release(void *calldata)
1257{
1258 struct nfs4_opendata *data = calldata;
1259 struct nfs4_state *state = NULL;
1260
1261 /* If this request hasn't been cancelled, do nothing */
1262 if (data->cancelled == 0)
1263 goto out_free;
1264 /* In case of error, no cleanup! */
3e309914 1265 if (!data->rpc_done)
cdd4e68b 1266 goto out_free;
cdd4e68b 1267 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1268 if (!IS_ERR(state))
dc0b027d 1269 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1270out_free:
c6d00e63 1271 nfs4_opendata_put(data);
cdd4e68b
TM		 1272}
1273
1274static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1275 .rpc_call_done = nfs4_open_confirm_done,
1276 .rpc_release = nfs4_open_confirm_release,
1277};
1278
1279/*
1280 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1281 */
1282static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1283{
1284 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1285 struct rpc_task *task;
5138fde0
TM		 1286 struct rpc_message msg = {
1287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1288 .rpc_argp = &data->c_arg,
1289 .rpc_resp = &data->c_res,
1290 .rpc_cred = data->owner->so_cred,
1291 };
c970aa85
TM		 1292 struct rpc_task_setup task_setup_data = {
1293 .rpc_client = server->client,
5138fde0 1294 .rpc_message = &msg,
c970aa85
TM		 1295 .callback_ops = &nfs4_open_confirm_ops,
1296 .callback_data = data,
101070ca 1297 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1298 .flags = RPC_TASK_ASYNC,
1299 };
1da177e4
LT		 1300 int status;
1301
c6d00e63 1302 kref_get(&data->kref);
3e309914
TM		 1303 data->rpc_done = 0;
1304 data->rpc_status = 0;
5138fde0 1305 data->timestamp = jiffies;
c970aa85 1306 task = rpc_run_task(&task_setup_data);
7a1218a2 1307 if (IS_ERR(task))
cdd4e68b 1308 return PTR_ERR(task);
cdd4e68b
TM		 1309 status = nfs4_wait_for_completion_rpc_task(task);
1310 if (status != 0) {
1311 data->cancelled = 1;
1312 smp_wmb();
1313 } else
1314 status = data->rpc_status;
e6b3c4db 1315 rpc_put_task(task);
1da177e4
LT		 1316 return status;
1317}
1318
24ac23ab 1319static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1320{
24ac23ab
TM		 1321 struct nfs4_opendata *data = calldata;
1322 struct nfs4_state_owner *sp = data->owner;
5138fde0 1323
24ac23ab
TM		 1324 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1325 return;
aac00a8d
TM		 1326 /*
1327 * Check if we still need to send an OPEN call, or if we can use
1328 * a delegation instead.
1329 */
1330 if (data->state != NULL) {
1331 struct nfs_delegation *delegation;
1332
dc0b027d 1333 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1334 goto out_no_action;
aac00a8d
TM		 1335 rcu_read_lock();
1336 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1337 if (delegation != NULL &&
15c831bf 1338 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1339 rcu_read_unlock();
6ee41268 1340 goto out_no_action;
aac00a8d
TM		 1341 }
1342 rcu_read_unlock();
1343 }
24ac23ab 1344 /* Update sequence id. */
9f958ab8 1345 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1346 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1347 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1348 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1349 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1350 }
26e976a8 1351 data->timestamp = jiffies;
d898528c
AA		 1352 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1353 &data->o_arg.seq_args,
1354 &data->o_res.seq_res, 1, task))
1355 return;
5138fde0 1356 rpc_call_start(task);
6ee41268
TM		 1357 return;
1358out_no_action:
1359 task->tk_action = NULL;
1360
24ac23ab 1361}
1da177e4 1362
b257957e
AB		 1363static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1364{
1365 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1366 nfs4_open_prepare(task, calldata);
1367}
1368
24ac23ab
TM		 1369static void nfs4_open_done(struct rpc_task *task, void *calldata)
1370{
1371 struct nfs4_opendata *data = calldata;
1da177e4 1372
24ac23ab 1373 data->rpc_status = task->tk_status;
d898528c 1374
d61e612a
TM		 1375 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1376 task->tk_status);
d898528c 1377
24ac23ab
TM		 1378 if (RPC_ASSASSINATED(task))
1379 return;
1380 if (task->tk_status == 0) {
1381 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1382 case S_IFREG:
1383 break;
1384 case S_IFLNK:
24ac23ab 1385 data->rpc_status = -ELOOP;
6f926b5b
TM		 1386 break;
1387 case S_IFDIR:
24ac23ab 1388 data->rpc_status = -EISDIR;
6f926b5b
TM		 1389 break;
1390 default:
24ac23ab 1391 data->rpc_status = -ENOTDIR;
6f926b5b 1392 }
26e976a8 1393 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1394 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1395 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1396 }
3e309914 1397 data->rpc_done = 1;
24ac23ab 1398}
6f926b5b 1399
24ac23ab
TM		 1400static void nfs4_open_release(void *calldata)
1401{
1402 struct nfs4_opendata *data = calldata;
1403 struct nfs4_state *state = NULL;
1404
1405 /* If this request hasn't been cancelled, do nothing */
1406 if (data->cancelled == 0)
1407 goto out_free;
1408 /* In case of error, no cleanup! */
3e309914 1409 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1410 goto out_free;
1411 /* In case we need an open_confirm, no cleanup! */
1412 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1413 goto out_free;
24ac23ab 1414 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1415 if (!IS_ERR(state))
dc0b027d 1416 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1417out_free:
c6d00e63 1418 nfs4_opendata_put(data);
24ac23ab
TM		 1419}
1420
1421static const struct rpc_call_ops nfs4_open_ops = {
1422 .rpc_call_prepare = nfs4_open_prepare,
1423 .rpc_call_done = nfs4_open_done,
1424 .rpc_release = nfs4_open_release,
1425};
1426
b257957e
AB		 1427static const struct rpc_call_ops nfs4_recover_open_ops = {
1428 .rpc_call_prepare = nfs4_recover_open_prepare,
1429 .rpc_call_done = nfs4_open_done,
1430 .rpc_release = nfs4_open_release,
1431};
1432
1433static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1434{
1435 struct inode *dir = data->dir->d_inode;
1436 struct nfs_server *server = NFS_SERVER(dir);
1437 struct nfs_openargs *o_arg = &data->o_arg;
1438 struct nfs_openres *o_res = &data->o_res;
1439 struct rpc_task *task;
5138fde0
TM		 1440 struct rpc_message msg = {
1441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1442 .rpc_argp = o_arg,
1443 .rpc_resp = o_res,
1444 .rpc_cred = data->owner->so_cred,
1445 };
c970aa85
TM		 1446 struct rpc_task_setup task_setup_data = {
1447 .rpc_client = server->client,
5138fde0 1448 .rpc_message = &msg,
c970aa85
TM		 1449 .callback_ops = &nfs4_open_ops,
1450 .callback_data = data,
101070ca 1451 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1452 .flags = RPC_TASK_ASYNC,
1453 };
24ac23ab
TM		 1454 int status;
1455
c6d00e63 1456 kref_get(&data->kref);
3e309914
TM		 1457 data->rpc_done = 0;
1458 data->rpc_status = 0;
2ced46c2 1459 data->cancelled = 0;
b257957e
AB		 1460 if (isrecover)
1461 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1462 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1463 if (IS_ERR(task))
1464 return PTR_ERR(task);
1465 status = nfs4_wait_for_completion_rpc_task(task);
1466 if (status != 0) {
1467 data->cancelled = 1;
1468 smp_wmb();
1469 } else
1470 status = data->rpc_status;
1471 rpc_put_task(task);
1472
1473 return status;
1474}
1475
1476static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1477{
1478 struct inode *dir = data->dir->d_inode;
1479 struct nfs_openres *o_res = &data->o_res;
1480 int status;
1481
1482 status = nfs4_run_open_task(data, 1);
1483 if (status != 0 || !data->rpc_done)
1484 return status;
1485
1486 nfs_refresh_inode(dir, o_res->dir_attr);
1487
1488 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1489 status = _nfs4_proc_open_confirm(data);
1490 if (status != 0)
1491 return status;
1492 }
1493
1494 return status;
1495}
1496
1497/*
1498 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1499 */
1500static int _nfs4_proc_open(struct nfs4_opendata *data)
1501{
1502 struct inode *dir = data->dir->d_inode;
1503 struct nfs_server *server = NFS_SERVER(dir);
1504 struct nfs_openargs *o_arg = &data->o_arg;
1505 struct nfs_openres *o_res = &data->o_res;
1506 int status;
1507
1508 status = nfs4_run_open_task(data, 0);
3e309914 1509 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1510 return status;
1511
56ae19f3
TM		 1512 if (o_arg->open_flags & O_CREAT) {
1513 update_changeattr(dir, &o_res->cinfo);
1514 nfs_post_op_update_inode(dir, o_res->dir_attr);
1515 } else
1516 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1517 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1518 status = _nfs4_proc_open_confirm(data);
1da177e4 1519 if (status != 0)
24ac23ab 1520 return status;
1da177e4
LT		 1521 }
1522 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1523 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1524 return 0;
1da177e4
LT		 1525}
1526
10afec90 1527static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1528{
7539bbab 1529 struct nfs_client *clp = server->nfs_client;
a78cb57a 1530 unsigned int loop;
6b30954e 1531 int ret;
58d9714a 1532
a78cb57a 1533 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1534 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1535 if (ret != 0)
a78cb57a 1536 break;
e598d843
TM		 1537 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1538 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1539 break;
58d9714a 1540 nfs4_schedule_state_recovery(clp);
a78cb57a 1541 ret = -EIO;
6b30954e 1542 }
a78cb57a 1543 return ret;
58d9714a
TM		 1544}
1545
1da177e4
LT		 1546/*
1547 * OPEN_EXPIRED:
1548 * reclaim state on the server after a network partition.
1549 * Assumes caller holds the appropriate lock
1550 */
539cd03a 1551static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1552{
e56e0b78 1553 struct nfs4_opendata *opendata;
864472e9 1554 int ret;
1da177e4 1555
6f220ed5
TM		 1556 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1557 if (IS_ERR(opendata))
1558 return PTR_ERR(opendata);
864472e9 1559 ret = nfs4_open_recover(opendata, state);
35d05778 1560 if (ret == -ESTALE)
539cd03a 1561 d_drop(ctx->path.dentry);
c6d00e63 1562 nfs4_opendata_put(opendata);
864472e9 1563 return ret;
1da177e4
LT		 1564}
1565
a9ed2e25 1566static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1567{
539cd03a 1568 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1569 struct nfs4_exception exception = { };
1570 int err;
1571
1572 do {
539cd03a 1573 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1574 switch (err) {
1575 default:
1576 goto out;
1577 case -NFS4ERR_GRACE:
1578 case -NFS4ERR_DELAY:
1579 nfs4_handle_exception(server, err, &exception);
1580 err = 0;
1581 }
202b50dc 1582 } while (exception.retry);
a9ed2e25 1583out:
202b50dc
TM		 1584 return err;
1585}
1586
1da177e4
LT		 1587static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1588{
1da177e4 1589 struct nfs_open_context *ctx;
864472e9 1590 int ret;
1da177e4 1591
864472e9
TM		 1592 ctx = nfs4_state_find_open_context(state);
1593 if (IS_ERR(ctx))
1594 return PTR_ERR(ctx);
539cd03a 1595 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1596 put_nfs_open_context(ctx);
1597 return ret;
1da177e4
LT		 1598}
1599
aa53ed54
JL		 1600/*
1601 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1602 * fields corresponding to attributes that were used to store the verifier.
1603 * Make sure we clobber those fields in the later setattr call
1604 */
1605static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1606{
1607 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1608 !(sattr->ia_valid & ATTR_ATIME_SET))
1609 sattr->ia_valid |= ATTR_ATIME;
1610
1611 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1612 !(sattr->ia_valid & ATTR_MTIME_SET))
1613 sattr->ia_valid |= ATTR_MTIME;
1614}
1615
1da177e4 1616/*
24ac23ab 1617 * Returns a referenced nfs4_state
1da177e4 1618 */
dc0b027d 1619static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1620{
1621 struct nfs4_state_owner *sp;
1622 struct nfs4_state *state = NULL;
1623 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1624 struct nfs4_opendata *opendata;
aac00a8d 1625 int status;
1da177e4
LT		 1626
1627 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1628 status = -ENOMEM;
1629 if (!(sp = nfs4_get_state_owner(server, cred))) {
1630 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1631 goto out_err;
1632 }
58d9714a
TM		 1633 status = nfs4_recover_expired_lease(server);
1634 if (status != 0)
b4454fe1 1635 goto err_put_state_owner;
aac00a8d 1636 if (path->dentry->d_inode != NULL)
dc0b027d 1637 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1638 status = -ENOMEM;
dc0b027d 1639 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1640 if (opendata == NULL)
95d35cb4 1641 goto err_put_state_owner;
1da177e4 1642
aac00a8d
TM		 1643 if (path->dentry->d_inode != NULL)
1644 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1645
24ac23ab 1646 status = _nfs4_proc_open(opendata);
1da177e4 1647 if (status != 0)
c6d00e63 1648 goto err_opendata_put;
1da177e4 1649
aa53ed54
JL		 1650 if (opendata->o_arg.open_flags & O_EXCL)
1651 nfs4_exclusive_attrset(opendata, sattr);
1652
24ac23ab 1653 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1654 status = PTR_ERR(state);
1655 if (IS_ERR(state))
c6d00e63 1656 goto err_opendata_put;
8e469ebd
TM		 1657 if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
1658 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
c6d00e63 1659 nfs4_opendata_put(opendata);
1da177e4 1660 nfs4_put_state_owner(sp);
1da177e4
LT		 1661 *res = state;
1662 return 0;
c6d00e63
TM		 1663err_opendata_put:
1664 nfs4_opendata_put(opendata);
e56e0b78
TM		 1665err_put_state_owner:
1666 nfs4_put_state_owner(sp);
1da177e4 1667out_err:
1da177e4
LT		 1668 *res = NULL;
1669 return status;
1670}
1671
1672
dc0b027d 1673static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1674{
1675 struct nfs4_exception exception = { };
1676 struct nfs4_state *res;
1677 int status;
1678
1679 do {
dc0b027d 1680 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1681 if (status == 0)
1682 break;
1683 /* NOTE: BAD_SEQID means the server and client disagree about the
1684 * book-keeping w.r.t. state-changing operations
1685 * (OPEN/CLOSE/LOCK/LOCKU...)
1686 * It is actually a sign of a bug on the client or on the server.
1687 *
1688 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1689 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1690 * have unhashed the old state_owner for us, and that we can
1691 * therefore safely retry using a new one. We should still warn
1692 * the user though...
1693 */
1694 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1695 printk(KERN_WARNING "NFS: v4 server %s "
1696 " returned a bad sequence-id error!\n",
1697 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1698 exception.retry = 1;
1699 continue;
1700 }
550f5747
TM		 1701 /*
1702 * BAD_STATEID on OPEN means that the server cancelled our
1703 * state before it received the OPEN_CONFIRM.
1704 * Recover by retrying the request as per the discussion
1705 * on Page 181 of RFC3530.
1706 */
1707 if (status == -NFS4ERR_BAD_STATEID) {
1708 exception.retry = 1;
1709 continue;
1710 }
aac00a8d
TM		 1711 if (status == -EAGAIN) {
1712 /* We must have found a delegation */
1713 exception.retry = 1;
1714 continue;
1715 }
1da177e4
LT		 1716 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1717 status, &exception));
1718 } while (exception.retry);
1719 return res;
1720}
1721
659bfcd6
TM		 1722static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1723 struct nfs_fattr *fattr, struct iattr *sattr,
1724 struct nfs4_state *state)
1da177e4 1725{
3e4f6290 1726 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1727 struct nfs_setattrargs arg = {
3e4f6290 1728 .fh = NFS_FH(inode),
1da177e4
LT		 1729 .iap = sattr,
1730 .server = server,
1731 .bitmask = server->attr_bitmask,
1732 };
1733 struct nfs_setattrres res = {
1734 .fattr = fattr,
1735 .server = server,
1736 };
1737 struct rpc_message msg = {
659bfcd6
TM		 1738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1739 .rpc_argp = &arg,
1740 .rpc_resp = &res,
1741 .rpc_cred = cred,
1da177e4 1742 };
26e976a8 1743 unsigned long timestamp = jiffies;
65e4308d 1744 int status;
1da177e4 1745
0e574af1 1746 nfs_fattr_init(fattr);
1da177e4 1747
3e4f6290
TM		 1748 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1749 /* Use that stateid */
1750 } else if (state != NULL) {
08e9eac4
TM		 1751 nfs4_copy_stateid(&arg.stateid, state, current->files);
1752 } else
1da177e4
LT		 1753 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1754
cccef3b9 1755 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1756 if (status == 0 && state != NULL)
1757 renew_lease(server, timestamp);
65e4308d 1758 return status;
1da177e4
LT		 1759}
1760
659bfcd6
TM		 1761static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1762 struct nfs_fattr *fattr, struct iattr *sattr,
1763 struct nfs4_state *state)
1da177e4 1764{
3e4f6290 1765 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1766 struct nfs4_exception exception = { };
1767 int err;
1768 do {
1769 err = nfs4_handle_exception(server,
659bfcd6 1770 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1771 &exception);
1772 } while (exception.retry);
1773 return err;
1774}
1775
1776struct nfs4_closedata {
4a35bd41 1777 struct path path;
1da177e4
LT		 1778 struct inode *inode;
1779 struct nfs4_state *state;
1780 struct nfs_closeargs arg;
1781 struct nfs_closeres res;
516a6af6 1782 struct nfs_fattr fattr;
26e976a8 1783 unsigned long timestamp;
1da177e4
LT		 1784};
1785
963d8fe5 1786static void nfs4_free_closedata(void *data)
9512135d 1787{
963d8fe5
TM		 1788 struct nfs4_closedata *calldata = data;
1789 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1790
1791 nfs4_put_open_state(calldata->state);
1792 nfs_free_seqid(calldata->arg.seqid);
9512135d 1793 nfs4_put_state_owner(sp);
31f31db1 1794 path_put(&calldata->path);
9512135d
TM		 1795 kfree(calldata);
1796}
1797
88069f77
TM		 1798static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1799 fmode_t fmode)
1800{
1801 spin_lock(&state->owner->so_lock);
1802 if (!(fmode & FMODE_READ))
1803 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1804 if (!(fmode & FMODE_WRITE))
1805 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1806 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1807 spin_unlock(&state->owner->so_lock);
1808}
1809
963d8fe5 1810static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1811{
963d8fe5 1812 struct nfs4_closedata *calldata = data;
1da177e4 1813 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1814 struct nfs_server *server = NFS_SERVER(calldata->inode);
1815
19ddab06 1816 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1817 if (RPC_ASSASSINATED(task))
1818 return;
1da177e4
LT		 1819 /* hmm. we are done with the inode, and in the process of freeing
1820 * the state_owner. we keep this around to process errors
1821 */
1da177e4
LT		 1822 switch (task->tk_status) {
1823 case 0:
45328c35 1824 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1825 renew_lease(server, calldata->timestamp);
88069f77
TM		 1826 nfs4_close_clear_stateid_flags(state,
1827 calldata->arg.fmode);
1da177e4
LT		 1828 break;
1829 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1830 case -NFS4ERR_OLD_STATEID:
1831 case -NFS4ERR_BAD_STATEID:
1da177e4 1832 case -NFS4ERR_EXPIRED:
dc0b027d 1833 if (calldata->arg.fmode == 0)
9e33bed5 1834 break;
1da177e4 1835 default:
72211dbe
TM		 1836 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1837 rpc_restart_call_prepare(task);
1da177e4 1838 }
72211dbe 1839 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1840 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1841}
1842
4ce70ada 1843static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1844{
4ce70ada 1845 struct nfs4_closedata *calldata = data;
9512135d 1846 struct nfs4_state *state = calldata->state;
88069f77 1847 int call_close = 0;
9512135d 1848
963d8fe5 1849 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1850 return;
003707c7 1851
88069f77
TM		 1852 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1853 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1854 spin_lock(&state->owner->so_lock);
003707c7 1855 /* Calculate the change in open mode */
e7616923 1856 if (state->n_rdwr == 0) {
003707c7 1857 if (state->n_rdonly == 0) {
88069f77
TM		 1858 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1859 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1860 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1861 }
1862 if (state->n_wronly == 0) {
88069f77
TM		 1863 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1864 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1865 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1866 }
e7616923 1867 }
4cecb76f 1868 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1869
1870 if (!call_close) {
963d8fe5
TM		 1871 /* Note: exit _without_ calling nfs4_close_done */
1872 task->tk_action = NULL;
9512135d
TM		 1873 return;
1874 }
88069f77
TM		 1875
1876 if (calldata->arg.fmode == 0)
1877 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1878
516a6af6 1879 nfs_fattr_init(calldata->res.fattr);
26e976a8 1880 calldata->timestamp = jiffies;
19ddab06
AA		 1881 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1882 &calldata->arg.seq_args, &calldata->res.seq_res,
1883 1, task))
1884 return;
5138fde0 1885 rpc_call_start(task);
1da177e4
LT		 1886}
1887
963d8fe5 1888static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1889 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1890 .rpc_call_done = nfs4_close_done,
1891 .rpc_release = nfs4_free_closedata,
1892};
1893
1da177e4
LT		 1894/*
1895 * It is possible for data to be read/written from a mem-mapped file
1896 * after the sys_close call (which hits the vfs layer as a flush).
1897 * This means that we can't safely call nfsv4 close on a file until
1898 * the inode is cleared. This in turn means that we are not good
1899 * NFSv4 citizens - we do not indicate to the server to update the file's
1900 * share state even when we are done with one of the three share
1901 * stateid's in the inode.
1902 *
1903 * NOTE: Caller must be holding the sp->so_owner semaphore!
1904 */
a49c3c77 1905int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1906{
4a35bd41 1907 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1908 struct nfs4_closedata *calldata;
b39e625b
TM		 1909 struct nfs4_state_owner *sp = state->owner;
1910 struct rpc_task *task;
5138fde0
TM		 1911 struct rpc_message msg = {
1912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1913 .rpc_cred = state->owner->so_cred,
1914 };
c970aa85
TM		 1915 struct rpc_task_setup task_setup_data = {
1916 .rpc_client = server->client,
5138fde0 1917 .rpc_message = &msg,
c970aa85 1918 .callback_ops = &nfs4_close_ops,
101070ca 1919 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1920 .flags = RPC_TASK_ASYNC,
1921 };
9512135d 1922 int status = -ENOMEM;
1da177e4 1923
19ddab06 1924 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1925 if (calldata == NULL)
9512135d 1926 goto out;
4a35bd41 1927 calldata->inode = state->inode;
1da177e4 1928 calldata->state = state;
4a35bd41 1929 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1930 calldata->arg.stateid = &state->open_stateid;
1da177e4 1931 /* Serialization for the sequence id */
cee54fc9 1932 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1933 if (calldata->arg.seqid == NULL)
1934 goto out_free_calldata;
dc0b027d 1935 calldata->arg.fmode = 0;
a65318bf 1936 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1937 calldata->res.fattr = &calldata->fattr;
c1d51931 1938 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1939 calldata->res.server = server;
5f7dbd5c 1940 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1941 calldata->path.mnt = mntget(path->mnt);
1942 calldata->path.dentry = dget(path->dentry);
9512135d 1943
5138fde0
TM		 1944 msg.rpc_argp = &calldata->arg,
1945 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1946 task_setup_data.callback_data = calldata;
1947 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1948 if (IS_ERR(task))
1949 return PTR_ERR(task);
a49c3c77
TM		 1950 status = 0;
1951 if (wait)
1952 status = rpc_wait_for_completion_task(task);
b39e625b 1953 rpc_put_task(task);
a49c3c77 1954 return status;
9512135d
TM		 1955out_free_calldata:
1956 kfree(calldata);
1957out:
b39e625b
TM		 1958 nfs4_put_open_state(state);
1959 nfs4_put_state_owner(sp);
9512135d 1960 return status;
1da177e4
LT		 1961}
1962
dc0b027d 1963static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1964{
1965 struct file *filp;
1b45c46c 1966 int ret;
02a913a7 1967
1b45c46c 1968 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1969 if (fmode & FMODE_EXEC) {
af22f94a 1970 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1971 state->owner->so_cred,
1972 nd->intent.open.flags);
1973 if (ret < 0)
1974 goto out_close;
1975 }
4a35bd41 1976 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1977 if (!IS_ERR(filp)) {
1978 struct nfs_open_context *ctx;
cd3758e3 1979 ctx = nfs_file_open_context(filp);
02a913a7 1980 ctx->state = state;
95cf959b
TM		 1981 return 0;
1982 }
1b45c46c
TM		 1983 ret = PTR_ERR(filp);
1984out_close:
dc0b027d 1985 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1986 return ret;
02a913a7
TM		 1987}
1988
1989struct dentry *
1da177e4
LT		 1990nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1991{
ad389da7 1992 struct path path = {
4ac91378 1993 .mnt = nd->path.mnt,
ad389da7
TM		 1994 .dentry = dentry,
1995 };
4ac91378 1996 struct dentry *parent;
1da177e4
LT		 1997 struct iattr attr;
1998 struct rpc_cred *cred;
1999 struct nfs4_state *state;
02a913a7 2000 struct dentry *res;
dc0b027d 2001 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2002
2003 if (nd->flags & LOOKUP_CREATE) {
2004 attr.ia_mode = nd->intent.open.create_mode;
2005 attr.ia_valid = ATTR_MODE;
2006 if (!IS_POSIXACL(dir))
ce3b0f8d 2007 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2008 } else {
2009 attr.ia_valid = 0;
2010 BUG_ON(nd->intent.open.flags & O_CREAT);
2011 }
2012
98a8e323 2013 cred = rpc_lookup_cred();
1da177e4 2014 if (IS_ERR(cred))
02a913a7 2015 return (struct dentry *)cred;
565277f6
TM		 2016 parent = dentry->d_parent;
2017 /* Protect against concurrent sillydeletes */
2018 nfs_block_sillyrename(parent);
dc0b027d 2019 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2020 put_rpccred(cred);
02a913a7 2021 if (IS_ERR(state)) {
d75340cc 2022 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2023 d_add(dentry, NULL);
d75340cc
TM		 2024 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2025 }
565277f6 2026 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2027 return (struct dentry *)state;
2028 }
24ac23ab 2029 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2030 if (res != NULL)
deee9369 2031 path.dentry = res;
d75340cc 2032 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2033 nfs_unblock_sillyrename(parent);
dc0b027d 2034 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2035 return res;
1da177e4
LT		 2036}
2037
2038int
02a913a7 2039nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2040{
ad389da7 2041 struct path path = {
4ac91378 2042 .mnt = nd->path.mnt,
ad389da7
TM		 2043 .dentry = dentry,
2044 };
1da177e4
LT		 2045 struct rpc_cred *cred;
2046 struct nfs4_state *state;
dc0b027d 2047 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2048
98a8e323 2049 cred = rpc_lookup_cred();
1da177e4
LT		 2050 if (IS_ERR(cred))
2051 return PTR_ERR(cred);
dc0b027d 2052 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2053 put_rpccred(cred);
02a913a7
TM		 2054 if (IS_ERR(state)) {
2055 switch (PTR_ERR(state)) {
2056 case -EPERM:
2057 case -EACCES:
2058 case -EDQUOT:
2059 case -ENOSPC:
2060 case -EROFS:
2061 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2062 return 1;
b87c0adf
CL		 2063 default:
2064 goto out_drop;
02a913a7 2065 }
02a913a7 2066 }
24ac23ab 2067 if (state->inode == dentry->d_inode) {
d75340cc 2068 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2069 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2070 return 1;
2071 }
dc0b027d 2072 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2073out_drop:
2074 d_drop(dentry);
1da177e4
LT		 2075 return 0;
2076}
2077
1185a552 2078static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2079{
2080 if (ctx->state == NULL)
2081 return;
2082 if (is_sync)
2083 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2084 else
2085 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2086}
1da177e4
LT		 2087
2088static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2089{
43652ad5
BH		 2090 struct nfs4_server_caps_arg args = {
2091 .fhandle = fhandle,
2092 };
1da177e4
LT		 2093 struct nfs4_server_caps_res res = {};
2094 struct rpc_message msg = {
2095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2096 .rpc_argp = &args,
1da177e4
LT		 2097 .rpc_resp = &res,
2098 };
2099 int status;
2100
cccef3b9 2101 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2102 if (status == 0) {
2103 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2104 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2105 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2106 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2107 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2108 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2109 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2110 server->caps |= NFS_CAP_ACLS;
2111 if (res.has_links != 0)
2112 server->caps |= NFS_CAP_HARDLINKS;
2113 if (res.has_symlinks != 0)
2114 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2115 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2116 server->caps |= NFS_CAP_FILEID;
2117 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2118 server->caps |= NFS_CAP_MODE;
2119 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2120 server->caps |= NFS_CAP_NLINK;
2121 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2122 server->caps |= NFS_CAP_OWNER;
2123 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2124 server->caps |= NFS_CAP_OWNER_GROUP;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2126 server->caps |= NFS_CAP_ATIME;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2128 server->caps |= NFS_CAP_CTIME;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2130 server->caps |= NFS_CAP_MTIME;
2131
a65318bf
TM		 2132 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2133 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2134 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2135 server->acl_bitmask = res.acl_bitmask;
2136 }
cccef3b9 2137
1da177e4
LT		 2138 return status;
2139}
2140
55a97593 2141int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2142{
2143 struct nfs4_exception exception = { };
2144 int err;
2145 do {
2146 err = nfs4_handle_exception(server,
2147 _nfs4_server_capabilities(server, fhandle),
2148 &exception);
2149 } while (exception.retry);
2150 return err;
2151}
2152
2153static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2154 struct nfs_fsinfo *info)
2155{
1da177e4
LT		 2156 struct nfs4_lookup_root_arg args = {
2157 .bitmask = nfs4_fattr_bitmap,
2158 };
2159 struct nfs4_lookup_res res = {
2160 .server = server,
0e574af1 2161 .fattr = info->fattr,
1da177e4
LT		 2162 .fh = fhandle,
2163 };
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2166 .rpc_argp = &args,
2167 .rpc_resp = &res,
2168 };
008f55d0 2169
0e574af1 2170 nfs_fattr_init(info->fattr);
fccba804 2171 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2172}
2173
2174static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2175 struct nfs_fsinfo *info)
2176{
2177 struct nfs4_exception exception = { };
2178 int err;
2179 do {
2180 err = nfs4_handle_exception(server,
2181 _nfs4_lookup_root(server, fhandle, info),
2182 &exception);
2183 } while (exception.retry);
2184 return err;
2185}
2186
54ceac45
DH		 2187/*
2188 * get the file handle for the "/" directory on the server
2189 */
1da177e4 2190static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2191 struct nfs_fsinfo *info)
1da177e4 2192{
1da177e4
LT		 2193 int status;
2194
1da177e4 2195 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2196 if (status == 0)
2197 status = nfs4_server_capabilities(server, fhandle);
2198 if (status == 0)
2199 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2200 return nfs4_map_errors(status);
1da177e4
LT		 2201}
2202
6b97fd3d
MN		 2203/*
2204 * Get locations and (maybe) other attributes of a referral.
2205 * Note that we'll actually follow the referral later when
2206 * we detect fsid mismatch in inode revalidation
2207 */
56659e99 2208static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2209{
2210 int status = -ENOMEM;
2211 struct page *page = NULL;
2212 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2213
2214 page = alloc_page(GFP_KERNEL);
2215 if (page == NULL)
2216 goto out;
2217 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2218 if (locations == NULL)
2219 goto out;
2220
c228fd3a 2221 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2222 if (status != 0)
2223 goto out;
2224 /* Make sure server returned a different fsid for the referral */
2225 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2226 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2227 status = -EIO;
2228 goto out;
2229 }
2230
2231 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2232 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2233 if (!fattr->mode)
2234 fattr->mode = S_IFDIR;
2235 memset(fhandle, 0, sizeof(struct nfs_fh));
2236out:
2237 if (page)
2238 __free_page(page);
2239 if (locations)
2240 kfree(locations);
2241 return status;
2242}
2243
1da177e4
LT		 2244static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2245{
2246 struct nfs4_getattr_arg args = {
2247 .fh = fhandle,
2248 .bitmask = server->attr_bitmask,
2249 };
2250 struct nfs4_getattr_res res = {
2251 .fattr = fattr,
2252 .server = server,
2253 };
2254 struct rpc_message msg = {
2255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2256 .rpc_argp = &args,
2257 .rpc_resp = &res,
2258 };
2259
0e574af1 2260 nfs_fattr_init(fattr);
cccef3b9 2261 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2262}
2263
2264static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2265{
2266 struct nfs4_exception exception = { };
2267 int err;
2268 do {
2269 err = nfs4_handle_exception(server,
2270 _nfs4_proc_getattr(server, fhandle, fattr),
2271 &exception);
2272 } while (exception.retry);
2273 return err;
2274}
2275
2276/*
2277 * The file is not closed if it is opened due to the a request to change
2278 * the size of the file. The open call will not be needed once the
2279 * VFS layer lookup-intents are implemented.
2280 *
2281 * Close is called when the inode is destroyed.
2282 * If we haven't opened the file for O_WRONLY, we
2283 * need to in the size_change case to obtain a stateid.
2284 *
2285 * Got race?
2286 * Because OPEN is always done by name in nfsv4, it is
2287 * possible that we opened a different file by the same
2288 * name. We can recognize this race condition, but we
2289 * can't do anything about it besides returning an error.
2290 *
2291 * This will be fixed with VFS changes (lookup-intent).
2292 */
2293static int
2294nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2295 struct iattr *sattr)
2296{
08e9eac4 2297 struct inode *inode = dentry->d_inode;
659bfcd6 2298 struct rpc_cred *cred = NULL;
d530838b 2299 struct nfs4_state *state = NULL;
1da177e4
LT		 2300 int status;
2301
0e574af1 2302 nfs_fattr_init(fattr);
1da177e4 2303
d530838b 2304 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2305 if (sattr->ia_valid & ATTR_FILE) {
2306 struct nfs_open_context *ctx;
2307
2308 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2309 if (ctx) {
2310 cred = ctx->cred;
2311 state = ctx->state;
2312 }
659bfcd6 2313 }
08e9eac4 2314
659bfcd6 2315 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2316 if (status == 0)
2317 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2318 return status;
2319}
2320
56659e99
TM		 2321static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2322 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2323 struct nfs_fattr *fattr)
2324{
2325 int status;
2326 struct nfs4_lookup_arg args = {
2327 .bitmask = server->attr_bitmask,
2328 .dir_fh = dirfh,
2329 .name = name,
2330 };
2331 struct nfs4_lookup_res res = {
2332 .server = server,
2333 .fattr = fattr,
2334 .fh = fhandle,
2335 };
2336 struct rpc_message msg = {
2337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2338 .rpc_argp = &args,
2339 .rpc_resp = &res,
2340 };
2341
2342 nfs_fattr_init(fattr);
2343
2344 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2345 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2346 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2347 return status;
2348}
2349
2350static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2351 struct qstr *name, struct nfs_fh *fhandle,
2352 struct nfs_fattr *fattr)
2353{
2354 struct nfs4_exception exception = { };
2355 int err;
2356 do {
4e56e082
TM		 2357 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2358 /* FIXME: !!!! */
2359 if (err == -NFS4ERR_MOVED) {
2360 err = -EREMOTE;
2361 break;
2362 }
2363 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2364 } while (exception.retry);
2365 return err;
2366}
2367
56659e99 2368static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2369 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2370{
4e56e082 2371 int status;
1da177e4
LT		 2372
2373 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2374 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2375 if (status == -NFS4ERR_MOVED)
2376 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2377 dprintk("NFS reply lookup: %d\n", status);
2378 return status;
2379}
2380
2381static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2382{
2383 struct nfs4_exception exception = { };
2384 int err;
2385 do {
2386 err = nfs4_handle_exception(NFS_SERVER(dir),
2387 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2388 &exception);
2389 } while (exception.retry);
2390 return err;
2391}
2392
2393static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2394{
76b32999
TM		 2395 struct nfs_server *server = NFS_SERVER(inode);
2396 struct nfs_fattr fattr;
1da177e4
LT		 2397 struct nfs4_accessargs args = {
2398 .fh = NFS_FH(inode),
76b32999
TM		 2399 .bitmask = server->attr_bitmask,
2400 };
2401 struct nfs4_accessres res = {
2402 .server = server,
2403 .fattr = &fattr,
1da177e4 2404 };
1da177e4
LT		 2405 struct rpc_message msg = {
2406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2407 .rpc_argp = &args,
2408 .rpc_resp = &res,
2409 .rpc_cred = entry->cred,
2410 };
2411 int mode = entry->mask;
2412 int status;
2413
2414 /*
2415 * Determine which access bits we want to ask for...
2416 */
2417 if (mode & MAY_READ)
2418 args.access |= NFS4_ACCESS_READ;
2419 if (S_ISDIR(inode->i_mode)) {
2420 if (mode & MAY_WRITE)
2421 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2422 if (mode & MAY_EXEC)
2423 args.access |= NFS4_ACCESS_LOOKUP;
2424 } else {
2425 if (mode & MAY_WRITE)
2426 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2427 if (mode & MAY_EXEC)
2428 args.access |= NFS4_ACCESS_EXECUTE;
2429 }
76b32999 2430 nfs_fattr_init(&fattr);
cccef3b9 2431 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2432 if (!status) {
2433 entry->mask = 0;
2434 if (res.access & NFS4_ACCESS_READ)
2435 entry->mask |= MAY_READ;
2436 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2437 entry->mask |= MAY_WRITE;
2438 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2439 entry->mask |= MAY_EXEC;
76b32999 2440 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2441 }
2442 return status;
2443}
2444
2445static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2446{
2447 struct nfs4_exception exception = { };
2448 int err;
2449 do {
2450 err = nfs4_handle_exception(NFS_SERVER(inode),
2451 _nfs4_proc_access(inode, entry),
2452 &exception);
2453 } while (exception.retry);
2454 return err;
2455}
2456
2457/*
2458 * TODO: For the time being, we don't try to get any attributes
2459 * along with any of the zero-copy operations READ, READDIR,
2460 * READLINK, WRITE.
2461 *
2462 * In the case of the first three, we want to put the GETATTR
2463 * after the read-type operation -- this is because it is hard
2464 * to predict the length of a GETATTR response in v4, and thus
2465 * align the READ data correctly. This means that the GETATTR
2466 * may end up partially falling into the page cache, and we should
2467 * shift it into the 'tail' of the xdr_buf before processing.
2468 * To do this efficiently, we need to know the total length
2469 * of data received, which doesn't seem to be available outside
2470 * of the RPC layer.
2471 *
2472 * In the case of WRITE, we also want to put the GETATTR after
2473 * the operation -- in this case because we want to make sure
2474 * we get the post-operation mtime and size. This means that
2475 * we can't use xdr_encode_pages() as written: we need a variant
2476 * of it which would leave room in the 'tail' iovec.
2477 *
2478 * Both of these changes to the XDR layer would in fact be quite
2479 * minor, but I decided to leave them for a subsequent patch.
2480 */
2481static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2482 unsigned int pgbase, unsigned int pglen)
2483{
2484 struct nfs4_readlink args = {
2485 .fh = NFS_FH(inode),
2486 .pgbase = pgbase,
2487 .pglen = pglen,
2488 .pages = &page,
2489 };
f50c7000 2490 struct nfs4_readlink_res res;
1da177e4
LT		 2491 struct rpc_message msg = {
2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2493 .rpc_argp = &args,
f50c7000 2494 .rpc_resp = &res,
1da177e4
LT		 2495 };
2496
cccef3b9 2497 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2498}
2499
2500static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2501 unsigned int pgbase, unsigned int pglen)
2502{
2503 struct nfs4_exception exception = { };
2504 int err;
2505 do {
2506 err = nfs4_handle_exception(NFS_SERVER(inode),
2507 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2508 &exception);
2509 } while (exception.retry);
2510 return err;
2511}
2512
1da177e4
LT		 2513/*
2514 * Got race?
2515 * We will need to arrange for the VFS layer to provide an atomic open.
2516 * Until then, this create/open method is prone to inefficiency and race
2517 * conditions due to the lookup, create, and open VFS calls from sys_open()
2518 * placed on the wire.
2519 *
2520 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2521 * The file will be opened again in the subsequent VFS open call
2522 * (nfs4_proc_file_open).
2523 *
2524 * The open for read will just hang around to be used by any process that
2525 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2526 */
2527
2528static int
2529nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2530 int flags, struct nameidata *nd)
1da177e4 2531{
ad389da7 2532 struct path path = {
4ac91378 2533 .mnt = nd->path.mnt,
ad389da7
TM		 2534 .dentry = dentry,
2535 };
1da177e4
LT		 2536 struct nfs4_state *state;
2537 struct rpc_cred *cred;
dc0b027d 2538 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2539 int status = 0;
2540
98a8e323 2541 cred = rpc_lookup_cred();
1da177e4
LT		 2542 if (IS_ERR(cred)) {
2543 status = PTR_ERR(cred);
2544 goto out;
2545 }
dc0b027d 2546 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2547 d_drop(dentry);
1da177e4
LT		 2548 if (IS_ERR(state)) {
2549 status = PTR_ERR(state);
659bfcd6 2550 goto out_putcred;
1da177e4 2551 }
d4d9cdcb 2552 d_add(dentry, igrab(state->inode));
d75340cc 2553 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2554 if (flags & O_EXCL) {
2555 struct nfs_fattr fattr;
659bfcd6 2556 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2557 if (status == 0)
65e4308d 2558 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2559 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2560 }
ad389da7 2561 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2562 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2563 else
dc0b027d 2564 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2565out_putcred:
2566 put_rpccred(cred);
1da177e4
LT		 2567out:
2568 return status;
2569}
2570
2571static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2572{
16e42959 2573 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2574 struct nfs_removeargs args = {
1da177e4 2575 .fh = NFS_FH(dir),
4fdc17b2
TM		 2576 .name.len = name->len,
2577 .name.name = name->name,
16e42959
TM		 2578 .bitmask = server->attr_bitmask,
2579 };
4fdc17b2 2580 struct nfs_removeres res = {
16e42959 2581 .server = server,
1da177e4 2582 };
1da177e4 2583 struct rpc_message msg = {
4fdc17b2
TM		 2584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2585 .rpc_argp = &args,
2586 .rpc_resp = &res,
1da177e4
LT		 2587 };
2588 int status;
2589
4fdc17b2 2590 nfs_fattr_init(&res.dir_attr);
cccef3b9 2591 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2592 if (status == 0) {
2593 update_changeattr(dir, &res.cinfo);
4fdc17b2 2594 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2595 }
1da177e4
LT		 2596 return status;
2597}
2598
2599static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2600{
2601 struct nfs4_exception exception = { };
2602 int err;
2603 do {
2604 err = nfs4_handle_exception(NFS_SERVER(dir),
2605 _nfs4_proc_remove(dir, name),
2606 &exception);
2607 } while (exception.retry);
2608 return err;
2609}
2610
e4eff1a6 2611static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2612{
e4eff1a6
TM		 2613 struct nfs_server *server = NFS_SERVER(dir);
2614 struct nfs_removeargs *args = msg->rpc_argp;
2615 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2616
a65318bf 2617 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2618 res->server = server;
1da177e4 2619 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2620}
2621
e4eff1a6 2622static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2623{
e4eff1a6
TM		 2624 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2625
472cfbd9 2626 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2627 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2628 return 0;
2629 update_changeattr(dir, &res->cinfo);
2630 nfs_post_op_update_inode(dir, &res->dir_attr);
2631 return 1;
1da177e4
LT		 2632}
2633
2634static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2635 struct inode *new_dir, struct qstr *new_name)
2636{
6caf2c82 2637 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2638 struct nfs4_rename_arg arg = {
2639 .old_dir = NFS_FH(old_dir),
2640 .new_dir = NFS_FH(new_dir),
2641 .old_name = old_name,
2642 .new_name = new_name,
6caf2c82
TM		 2643 .bitmask = server->attr_bitmask,
2644 };
2645 struct nfs_fattr old_fattr, new_fattr;
2646 struct nfs4_rename_res res = {
2647 .server = server,
2648 .old_fattr = &old_fattr,
2649 .new_fattr = &new_fattr,
1da177e4 2650 };
1da177e4
LT		 2651 struct rpc_message msg = {
2652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2653 .rpc_argp = &arg,
2654 .rpc_resp = &res,
2655 };
2656 int status;
2657
6caf2c82
TM		 2658 nfs_fattr_init(res.old_fattr);
2659 nfs_fattr_init(res.new_fattr);
cccef3b9 2660 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2661
2662 if (!status) {
2663 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2664 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2665 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2666 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2667 }
2668 return status;
2669}
2670
2671static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2672 struct inode *new_dir, struct qstr *new_name)
2673{
2674 struct nfs4_exception exception = { };
2675 int err;
2676 do {
2677 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2678 _nfs4_proc_rename(old_dir, old_name,
2679 new_dir, new_name),
2680 &exception);
2681 } while (exception.retry);
2682 return err;
2683}
2684
2685static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2686{
91ba2eee 2687 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2688 struct nfs4_link_arg arg = {
2689 .fh = NFS_FH(inode),
2690 .dir_fh = NFS_FH(dir),
2691 .name = name,
91ba2eee
TM		 2692 .bitmask = server->attr_bitmask,
2693 };
2694 struct nfs_fattr fattr, dir_attr;
2695 struct nfs4_link_res res = {
2696 .server = server,
2697 .fattr = &fattr,
2698 .dir_attr = &dir_attr,
1da177e4 2699 };
1da177e4
LT		 2700 struct rpc_message msg = {
2701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2702 .rpc_argp = &arg,
91ba2eee 2703 .rpc_resp = &res,
1da177e4
LT		 2704 };
2705 int status;
2706
91ba2eee
TM		 2707 nfs_fattr_init(res.fattr);
2708 nfs_fattr_init(res.dir_attr);
cccef3b9 2709 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2710 if (!status) {
2711 update_changeattr(dir, &res.cinfo);
2712 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2713 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2714 }
1da177e4
LT		 2715
2716 return status;
2717}
2718
2719static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2720{
2721 struct nfs4_exception exception = { };
2722 int err;
2723 do {
2724 err = nfs4_handle_exception(NFS_SERVER(inode),
2725 _nfs4_proc_link(inode, dir, name),
2726 &exception);
2727 } while (exception.retry);
2728 return err;
2729}
2730
57dc9a57
TM		 2731struct nfs4_createdata {
2732 struct rpc_message msg;
2733 struct nfs4_create_arg arg;
2734 struct nfs4_create_res res;
2735 struct nfs_fh fh;
2736 struct nfs_fattr fattr;
2737 struct nfs_fattr dir_fattr;
2738};
2739
2740static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2741 struct qstr *name, struct iattr *sattr, u32 ftype)
2742{
2743 struct nfs4_createdata *data;
2744
2745 data = kzalloc(sizeof(*data), GFP_KERNEL);
2746 if (data != NULL) {
2747 struct nfs_server *server = NFS_SERVER(dir);
2748
2749 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2750 data->msg.rpc_argp = &data->arg;
2751 data->msg.rpc_resp = &data->res;
2752 data->arg.dir_fh = NFS_FH(dir);
2753 data->arg.server = server;
2754 data->arg.name = name;
2755 data->arg.attrs = sattr;
2756 data->arg.ftype = ftype;
2757 data->arg.bitmask = server->attr_bitmask;
2758 data->res.server = server;
2759 data->res.fh = &data->fh;
2760 data->res.fattr = &data->fattr;
2761 data->res.dir_fattr = &data->dir_fattr;
2762 nfs_fattr_init(data->res.fattr);
2763 nfs_fattr_init(data->res.dir_fattr);
2764 }
2765 return data;
2766}
2767
2768static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2769{
cccef3b9
AA		 2770 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2771 &data->arg, &data->res, 1);
57dc9a57
TM		 2772 if (status == 0) {
2773 update_changeattr(dir, &data->res.dir_cinfo);
2774 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2775 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2776 }
2777 return status;
2778}
2779
2780static void nfs4_free_createdata(struct nfs4_createdata *data)
2781{
2782 kfree(data);
2783}
2784
4f390c15 2785static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2786 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2787{
57dc9a57
TM		 2788 struct nfs4_createdata *data;
2789 int status = -ENAMETOOLONG;
1da177e4 2790
94a6d753 2791 if (len > NFS4_MAXPATHLEN)
57dc9a57 2792 goto out;
4f390c15 2793
57dc9a57
TM		 2794 status = -ENOMEM;
2795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2796 if (data == NULL)
2797 goto out;
2798
2799 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2800 data->arg.u.symlink.pages = &page;
2801 data->arg.u.symlink.len = len;
1da177e4 2802
57dc9a57
TM		 2803 status = nfs4_do_create(dir, dentry, data);
2804
2805 nfs4_free_createdata(data);
2806out:
1da177e4
LT		 2807 return status;
2808}
2809
4f390c15 2810static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2811 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2812{
2813 struct nfs4_exception exception = { };
2814 int err;
2815 do {
2816 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2817 _nfs4_proc_symlink(dir, dentry, page,
2818 len, sattr),
1da177e4
LT		 2819 &exception);
2820 } while (exception.retry);
2821 return err;
2822}
2823
2824static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2825 struct iattr *sattr)
2826{
57dc9a57
TM		 2827 struct nfs4_createdata *data;
2828 int status = -ENOMEM;
1da177e4 2829
57dc9a57
TM		 2830 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2831 if (data == NULL)
2832 goto out;
2833
2834 status = nfs4_do_create(dir, dentry, data);
2835
2836 nfs4_free_createdata(data);
2837out:
1da177e4
LT		 2838 return status;
2839}
2840
2841static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2842 struct iattr *sattr)
2843{
2844 struct nfs4_exception exception = { };
2845 int err;
2846 do {
2847 err = nfs4_handle_exception(NFS_SERVER(dir),
2848 _nfs4_proc_mkdir(dir, dentry, sattr),
2849 &exception);
2850 } while (exception.retry);
2851 return err;
2852}
2853
2854static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2855 u64 cookie, struct page *page, unsigned int count, int plus)
2856{
2857 struct inode *dir = dentry->d_inode;
2858 struct nfs4_readdir_arg args = {
2859 .fh = NFS_FH(dir),
2860 .pages = &page,
2861 .pgbase = 0,
2862 .count = count,
96d25e53 2863 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2864 };
2865 struct nfs4_readdir_res res;
2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2868 .rpc_argp = &args,
2869 .rpc_resp = &res,
2870 .rpc_cred = cred,
2871 };
2872 int status;
2873
3110ff80 2874 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2875 dentry->d_parent->d_name.name,
2876 dentry->d_name.name,
2877 (unsigned long long)cookie);
1da177e4
LT		 2878 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2879 res.pgbase = args.pgbase;
cccef3b9 2880 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2881 if (status == 0)
2882 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2883
2884 nfs_invalidate_atime(dir);
2885
3110ff80 2886 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2887 return status;
2888}
2889
2890static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2891 u64 cookie, struct page *page, unsigned int count, int plus)
2892{
2893 struct nfs4_exception exception = { };
2894 int err;
2895 do {
2896 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2897 _nfs4_proc_readdir(dentry, cred, cookie,
2898 page, count, plus),
2899 &exception);
2900 } while (exception.retry);
2901 return err;
2902}
2903
2904static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2905 struct iattr *sattr, dev_t rdev)
2906{
57dc9a57
TM		 2907 struct nfs4_createdata *data;
2908 int mode = sattr->ia_mode;
2909 int status = -ENOMEM;
1da177e4
LT		 2910
2911 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2912 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2913
2914 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2915 if (data == NULL)
2916 goto out;
2917
1da177e4 2918 if (S_ISFIFO(mode))
57dc9a57 2919 data->arg.ftype = NF4FIFO;
1da177e4 2920 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2921 data->arg.ftype = NF4BLK;
2922 data->arg.u.device.specdata1 = MAJOR(rdev);
2923 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2924 }
2925 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2926 data->arg.ftype = NF4CHR;
2927 data->arg.u.device.specdata1 = MAJOR(rdev);
2928 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2929 }
1da177e4 2930
57dc9a57
TM		 2931 status = nfs4_do_create(dir, dentry, data);
2932
2933 nfs4_free_createdata(data);
2934out:
1da177e4
LT		 2935 return status;
2936}
2937
2938static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2939 struct iattr *sattr, dev_t rdev)
2940{
2941 struct nfs4_exception exception = { };
2942 int err;
2943 do {
2944 err = nfs4_handle_exception(NFS_SERVER(dir),
2945 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2946 &exception);
2947 } while (exception.retry);
2948 return err;
2949}
2950
2951static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_fsstat *fsstat)
2953{
2954 struct nfs4_statfs_arg args = {
2955 .fh = fhandle,
2956 .bitmask = server->attr_bitmask,
2957 };
24ad148a
BH		 2958 struct nfs4_statfs_res res = {
2959 .fsstat = fsstat,
2960 };
1da177e4
LT		 2961 struct rpc_message msg = {
2962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2963 .rpc_argp = &args,
24ad148a 2964 .rpc_resp = &res,
1da177e4
LT		 2965 };
2966
0e574af1 2967 nfs_fattr_init(fsstat->fattr);
cccef3b9 2968 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2969}
2970
2971static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2972{
2973 struct nfs4_exception exception = { };
2974 int err;
2975 do {
2976 err = nfs4_handle_exception(server,
2977 _nfs4_proc_statfs(server, fhandle, fsstat),
2978 &exception);
2979 } while (exception.retry);
2980 return err;
2981}
2982
2983static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2984 struct nfs_fsinfo *fsinfo)
2985{
2986 struct nfs4_fsinfo_arg args = {
2987 .fh = fhandle,
2988 .bitmask = server->attr_bitmask,
2989 };
3dda5e43
BH		 2990 struct nfs4_fsinfo_res res = {
2991 .fsinfo = fsinfo,
2992 };
1da177e4
LT		 2993 struct rpc_message msg = {
2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2995 .rpc_argp = &args,
3dda5e43 2996 .rpc_resp = &res,
1da177e4
LT		 2997 };
2998
cccef3b9 2999 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3000}
3001
3002static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3003{
3004 struct nfs4_exception exception = { };
3005 int err;
3006
3007 do {
3008 err = nfs4_handle_exception(server,
3009 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3010 &exception);
3011 } while (exception.retry);
3012 return err;
3013}
3014
3015static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3016{
0e574af1 3017 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3018 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3019}
3020
3021static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3022 struct nfs_pathconf *pathconf)
3023{
3024 struct nfs4_pathconf_arg args = {
3025 .fh = fhandle,
3026 .bitmask = server->attr_bitmask,
3027 };
d45b2989
BH		 3028 struct nfs4_pathconf_res res = {
3029 .pathconf = pathconf,
3030 };
1da177e4
LT		 3031 struct rpc_message msg = {
3032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3033 .rpc_argp = &args,
d45b2989 3034 .rpc_resp = &res,
1da177e4
LT		 3035 };
3036
3037 /* None of the pathconf attributes are mandatory to implement */
3038 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3039 memset(pathconf, 0, sizeof(*pathconf));
3040 return 0;
3041 }
3042
0e574af1 3043 nfs_fattr_init(pathconf->fattr);
cccef3b9 3044 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3045}
3046
3047static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3048 struct nfs_pathconf *pathconf)
3049{
3050 struct nfs4_exception exception = { };
3051 int err;
3052
3053 do {
3054 err = nfs4_handle_exception(server,
3055 _nfs4_proc_pathconf(server, fhandle, pathconf),
3056 &exception);
3057 } while (exception.retry);
3058 return err;
3059}
3060
ec06c096 3061static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3062{
ec06c096 3063 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3064
f11c88af
AA		 3065 dprintk("--> %s\n", __func__);
3066
f11c88af
AA		 3067 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3068
9e33bed5 3069 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3070 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3071 return -EAGAIN;
1da177e4 3072 }
8850df99
TM		 3073
3074 nfs_invalidate_atime(data->inode);
1da177e4 3075 if (task->tk_status > 0)
ec06c096
TM		 3076 renew_lease(server, data->timestamp);
3077 return 0;
1da177e4
LT		 3078}
3079
bdc7f021 3080static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3081{
1da177e4 3082 data->timestamp = jiffies;
bdc7f021 3083 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3084}
3085
788e7a89 3086static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3087{
1da177e4
LT		 3088 struct inode *inode = data->inode;
3089
def6ed7e
AA		 3090 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3091 task->tk_status);
3092
9e33bed5 3093 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3094 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3095 return -EAGAIN;
1da177e4 3096 }
4f9838c7 3097 if (task->tk_status >= 0) {
1da177e4 3098 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3099 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3100 }
788e7a89 3101 return 0;
1da177e4
LT		 3102}
3103
bdc7f021 3104static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3105{
bdc7f021
TM		 3106 struct nfs_server *server = NFS_SERVER(data->inode);
3107
a65318bf 3108 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3109 data->res.server = server;
1da177e4
LT		 3110 data->timestamp = jiffies;
3111
bdc7f021 3112 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3113}
3114
788e7a89 3115static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3116{
1da177e4
LT		 3117 struct inode *inode = data->inode;
3118
21d9a851
AA		 3119 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3120 task->tk_status);
9e33bed5 3121 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3122 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3123 return -EAGAIN;
1da177e4 3124 }
9e08a3c5 3125 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3126 return 0;
1da177e4
LT		 3127}
3128
bdc7f021 3129static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3130{
788e7a89 3131 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3132
a65318bf 3133 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3134 data->res.server = server;
bdc7f021 3135 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3136}
3137
3138/*
3139 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3140 * standalone procedure for queueing an asynchronous RENEW.
3141 */
963d8fe5 3142static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3143{
adfa6f98 3144 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3145 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3146
3147 if (task->tk_status < 0) {
95baa25c
TM		 3148 /* Unless we're shutting down, schedule state recovery! */
3149 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3150 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3151 return;
3152 }
3153 spin_lock(&clp->cl_lock);
3154 if (time_before(clp->cl_last_renewal,timestamp))
3155 clp->cl_last_renewal = timestamp;
3156 spin_unlock(&clp->cl_lock);
3157}
3158
963d8fe5
TM		 3159static const struct rpc_call_ops nfs4_renew_ops = {
3160 .rpc_call_done = nfs4_renew_done,
3161};
3162
adfa6f98 3163int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3164{
3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3167 .rpc_argp = clp,
b4454fe1 3168 .rpc_cred = cred,
1da177e4
LT		 3169 };
3170
3171 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3172 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3173}
3174
adfa6f98 3175int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3176{
3177 struct rpc_message msg = {
3178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3179 .rpc_argp = clp,
b4454fe1 3180 .rpc_cred = cred,
1da177e4
LT		 3181 };
3182 unsigned long now = jiffies;
3183 int status;
3184
3185 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3186 if (status < 0)
3187 return status;
3188 spin_lock(&clp->cl_lock);
3189 if (time_before(clp->cl_last_renewal,now))
3190 clp->cl_last_renewal = now;
3191 spin_unlock(&clp->cl_lock);
3192 return 0;
3193}
3194
aa1870af
BF		 3195static inline int nfs4_server_supports_acls(struct nfs_server *server)
3196{
3197 return (server->caps & NFS_CAP_ACLS)
3198 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3199 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3200}
3201
3202/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3203 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3204 * the stack.
3205 */
3206#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3207
3208static void buf_to_pages(const void *buf, size_t buflen,
3209 struct page **pages, unsigned int *pgbase)
3210{
3211 const void *p = buf;
3212
3213 *pgbase = offset_in_page(buf);
3214 p -= *pgbase;
3215 while (p < buf + buflen) {
3216 *(pages++) = virt_to_page(p);
3217 p += PAGE_CACHE_SIZE;
3218 }
3219}
3220
e50a1c2e
BF		 3221struct nfs4_cached_acl {
3222 int cached;
3223 size_t len;
3e9d4154 3224 char data[0];
e50a1c2e
BF		 3225};
3226
3227static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3228{
3229 struct nfs_inode *nfsi = NFS_I(inode);
3230
3231 spin_lock(&inode->i_lock);
3232 kfree(nfsi->nfs4_acl);
3233 nfsi->nfs4_acl = acl;
3234 spin_unlock(&inode->i_lock);
3235}
3236
3237static void nfs4_zap_acl_attr(struct inode *inode)
3238{
3239 nfs4_set_cached_acl(inode, NULL);
3240}
3241
3242static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3243{
3244 struct nfs_inode *nfsi = NFS_I(inode);
3245 struct nfs4_cached_acl *acl;
3246 int ret = -ENOENT;
3247
3248 spin_lock(&inode->i_lock);
3249 acl = nfsi->nfs4_acl;
3250 if (acl == NULL)
3251 goto out;
3252 if (buf == NULL) /* user is just asking for length */
3253 goto out_len;
3254 if (acl->cached == 0)
3255 goto out;
3256 ret = -ERANGE; /* see getxattr(2) man page */
3257 if (acl->len > buflen)
3258 goto out;
3259 memcpy(buf, acl->data, acl->len);
3260out_len:
3261 ret = acl->len;
3262out:
3263 spin_unlock(&inode->i_lock);
3264 return ret;
3265}
3266
3267static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3268{
3269 struct nfs4_cached_acl *acl;
3270
3271 if (buf && acl_len <= PAGE_SIZE) {
3272 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3273 if (acl == NULL)
3274 goto out;
3275 acl->cached = 1;
3276 memcpy(acl->data, buf, acl_len);
3277 } else {
3278 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3279 if (acl == NULL)
3280 goto out;
3281 acl->cached = 0;
3282 }
3283 acl->len = acl_len;
3284out:
3285 nfs4_set_cached_acl(inode, acl);
3286}
3287
16b4289c 3288static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3289{
aa1870af
BF		 3290 struct page *pages[NFS4ACL_MAXPAGES];
3291 struct nfs_getaclargs args = {
3292 .fh = NFS_FH(inode),
3293 .acl_pages = pages,
3294 .acl_len = buflen,
3295 };
663c79b3
BH		 3296 struct nfs_getaclres res = {
3297 .acl_len = buflen,
3298 };
e50a1c2e 3299 void *resp_buf;
aa1870af
BF		 3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3302 .rpc_argp = &args,
663c79b3 3303 .rpc_resp = &res,
aa1870af 3304 };
e50a1c2e 3305 struct page *localpage = NULL;
aa1870af
BF		 3306 int ret;
3307
e50a1c2e
BF		 3308 if (buflen < PAGE_SIZE) {
3309 /* As long as we're doing a round trip to the server anyway,
3310 * let's be prepared for a page of acl data. */
3311 localpage = alloc_page(GFP_KERNEL);
3312 resp_buf = page_address(localpage);
3313 if (localpage == NULL)
3314 return -ENOMEM;
3315 args.acl_pages[0] = localpage;
3316 args.acl_pgbase = 0;
663c79b3 3317 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3318 } else {
3319 resp_buf = buf;
3320 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3321 }
cccef3b9 3322 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3323 if (ret)
3324 goto out_free;
663c79b3
BH		 3325 if (res.acl_len > args.acl_len)
3326 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3327 else
663c79b3 3328 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3329 if (buf) {
3330 ret = -ERANGE;
663c79b3 3331 if (res.acl_len > buflen)
e50a1c2e
BF		 3332 goto out_free;
3333 if (localpage)
663c79b3 3334 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3335 }
663c79b3 3336 ret = res.acl_len;
e50a1c2e
BF		 3337out_free:
3338 if (localpage)
3339 __free_page(localpage);
aa1870af
BF		 3340 return ret;
3341}
3342
16b4289c
TM		 3343static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3344{
3345 struct nfs4_exception exception = { };
3346 ssize_t ret;
3347 do {
3348 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3349 if (ret >= 0)
3350 break;
3351 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3352 } while (exception.retry);
3353 return ret;
3354}
3355
e50a1c2e
BF		 3356static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3357{
3358 struct nfs_server *server = NFS_SERVER(inode);
3359 int ret;
3360
3361 if (!nfs4_server_supports_acls(server))
3362 return -EOPNOTSUPP;
3363 ret = nfs_revalidate_inode(server, inode);
3364 if (ret < 0)
3365 return ret;
3366 ret = nfs4_read_cached_acl(inode, buf, buflen);
3367 if (ret != -ENOENT)
3368 return ret;
3369 return nfs4_get_acl_uncached(inode, buf, buflen);
3370}
3371
16b4289c 3372static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3373{
3374 struct nfs_server *server = NFS_SERVER(inode);
3375 struct page *pages[NFS4ACL_MAXPAGES];
3376 struct nfs_setaclargs arg = {
3377 .fh = NFS_FH(inode),
3378 .acl_pages = pages,
3379 .acl_len = buflen,
3380 };
73c403a9 3381 struct nfs_setaclres res;
4b580ee3
BF		 3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3384 .rpc_argp = &arg,
73c403a9 3385 .rpc_resp = &res,
4b580ee3
BF		 3386 };
3387 int ret;
3388
3389 if (!nfs4_server_supports_acls(server))
3390 return -EOPNOTSUPP;
642ac549 3391 nfs_inode_return_delegation(inode);
4b580ee3 3392 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3393 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3394 nfs_access_zap_cache(inode);
3395 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3396 return ret;
3397}
3398
16b4289c
TM		 3399static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3400{
3401 struct nfs4_exception exception = { };
3402 int err;
3403 do {
3404 err = nfs4_handle_exception(NFS_SERVER(inode),
3405 __nfs4_proc_set_acl(inode, buf, buflen),
3406 &exception);
3407 } while (exception.retry);
3408 return err;
3409}
3410
1da177e4 3411static int
8328d59f 3412_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3413{
1da177e4
LT		 3414 if (!clp || task->tk_status >= 0)
3415 return 0;
3416 switch(task->tk_status) {
9e33bed5
TM		 3417 case -NFS4ERR_ADMIN_REVOKED:
3418 case -NFS4ERR_BAD_STATEID:
3419 case -NFS4ERR_OPENMODE:
3420 if (state == NULL)
3421 break;
3422 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3423 case -NFS4ERR_STALE_CLIENTID:
3424 case -NFS4ERR_STALE_STATEID:
3425 case -NFS4ERR_EXPIRED:
5d00837b 3426 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3427 nfs4_schedule_state_recovery(clp);
e005e804 3428 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3429 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3430 task->tk_status = 0;
3431 return -EAGAIN;
4745e315
AA		 3432#if defined(CONFIG_NFS_V4_1)
3433 case -NFS4ERR_BADSESSION:
3434 case -NFS4ERR_BADSLOT:
3435 case -NFS4ERR_BAD_HIGH_SLOT:
3436 case -NFS4ERR_DEADSESSION:
3437 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3438 case -NFS4ERR_SEQ_FALSE_RETRY:
3439 case -NFS4ERR_SEQ_MISORDERED:
3440 dprintk("%s ERROR %d, Reset session\n", __func__,
3441 task->tk_status);
0b9e2d41 3442 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3443 task->tk_status = 0;
3444 return -EAGAIN;
3445#endif /* CONFIG_NFS_V4_1 */
1da177e4 3446 case -NFS4ERR_DELAY:
8328d59f
AA		 3447 if (server)
3448 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3449 case -NFS4ERR_GRACE:
1da177e4
LT		 3450 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3451 task->tk_status = 0;
3452 return -EAGAIN;
3453 case -NFS4ERR_OLD_STATEID:
3454 task->tk_status = 0;
3455 return -EAGAIN;
3456 }
3457 task->tk_status = nfs4_map_errors(task->tk_status);
3458 return 0;
3459}
3460
8328d59f
AA		 3461static int
3462nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3463{
3464 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3465}
3466
adfa6f98 3467int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3468{
3469 nfs4_verifier sc_verifier;
3470 struct nfs4_setclientid setclientid = {
3471 .sc_verifier = &sc_verifier,
3472 .sc_prog = program,
3473 };
3474 struct rpc_message msg = {
3475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3476 .rpc_argp = &setclientid,
3477 .rpc_resp = clp,
286d7d6a 3478 .rpc_cred = cred,
1da177e4 3479 };
bc4785cd 3480 __be32 *p;
1da177e4
LT		 3481 int loop = 0;
3482 int status;
3483
bc4785cd 3484 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3485 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3486 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3487
3488 for(;;) {
3489 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3490 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3491 clp->cl_ipaddr,
3492 rpc_peeraddr2str(clp->cl_rpcclient,
3493 RPC_DISPLAY_ADDR),
69dd716c
TM		 3494 rpc_peeraddr2str(clp->cl_rpcclient,
3495 RPC_DISPLAY_PROTO),
78ea323b 3496 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3497 clp->cl_id_uniquifier);
3498 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3499 sizeof(setclientid.sc_netid),
3500 rpc_peeraddr2str(clp->cl_rpcclient,
3501 RPC_DISPLAY_NETID));
1da177e4 3502 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3503 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3504 clp->cl_ipaddr, port >> 8, port & 255);
3505
3506 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3507 if (status != -NFS4ERR_CLID_INUSE)
3508 break;
3509 if (signalled())
3510 break;
3511 if (loop++ & 1)
3512 ssleep(clp->cl_lease_time + 1);
3513 else
3514 if (++clp->cl_id_uniquifier == 0)
3515 break;
3516 }
3517 return status;
3518}
3519
adfa6f98 3520static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3521{
3522 struct nfs_fsinfo fsinfo;
3523 struct rpc_message msg = {
3524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3525 .rpc_argp = clp,
3526 .rpc_resp = &fsinfo,
286d7d6a 3527 .rpc_cred = cred,
1da177e4
LT		 3528 };
3529 unsigned long now;
3530 int status;
3531
3532 now = jiffies;
3533 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3534 if (status == 0) {
3535 spin_lock(&clp->cl_lock);
3536 clp->cl_lease_time = fsinfo.lease_time * HZ;
3537 clp->cl_last_renewal = now;
3538 spin_unlock(&clp->cl_lock);
3539 }
3540 return status;
3541}
3542
adfa6f98 3543int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3544{
77e03677 3545 long timeout = 0;
51581f3b
TM		 3546 int err;
3547 do {
3548 err = _nfs4_proc_setclientid_confirm(clp, cred);
3549 switch (err) {
3550 case 0:
3551 return err;
3552 case -NFS4ERR_RESOURCE:
3553 /* The IBM lawyers misread another document! */
3554 case -NFS4ERR_DELAY:
3555 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3556 }
3557 } while (err == 0);
3558 return err;
3559}
3560
fe650407
TM		 3561struct nfs4_delegreturndata {
3562 struct nfs4_delegreturnargs args;
fa178f29 3563 struct nfs4_delegreturnres res;
fe650407
TM		 3564 struct nfs_fh fh;
3565 nfs4_stateid stateid;
26e976a8 3566 unsigned long timestamp;
fa178f29 3567 struct nfs_fattr fattr;
fe650407
TM		 3568 int rpc_status;
3569};
3570
fe650407
TM		 3571static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3572{
3573 struct nfs4_delegreturndata *data = calldata;
938e1010 3574
d61e612a
TM		 3575 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3576 task->tk_status);
938e1010 3577
79708861
RL		 3578 switch (task->tk_status) {
3579 case -NFS4ERR_STALE_STATEID:
3580 case -NFS4ERR_EXPIRED:
3581 case 0:
fa178f29 3582 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3583 break;
3584 default:
3585 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3586 -EAGAIN) {
3587 nfs_restart_rpc(task, data->res.server->nfs_client);
3588 return;
3589 }
3590 }
3591 data->rpc_status = task->tk_status;
fe650407
TM		 3592}
3593
3594static void nfs4_delegreturn_release(void *calldata)
3595{
fe650407
TM		 3596 kfree(calldata);
3597}
3598
938e1010
AA		 3599#if defined(CONFIG_NFS_V4_1)
3600static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3601{
3602 struct nfs4_delegreturndata *d_data;
3603
3604 d_data = (struct nfs4_delegreturndata *)data;
3605
3606 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3607 &d_data->args.seq_args,
3608 &d_data->res.seq_res, 1, task))
3609 return;
3610 rpc_call_start(task);
3611}
3612#endif /* CONFIG_NFS_V4_1 */
3613
c8d149f3 3614static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3615#if defined(CONFIG_NFS_V4_1)
3616 .rpc_call_prepare = nfs4_delegreturn_prepare,
3617#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3618 .rpc_call_done = nfs4_delegreturn_done,
3619 .rpc_release = nfs4_delegreturn_release,
3620};
3621
e6f81075 3622static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3623{
3624 struct nfs4_delegreturndata *data;
fa178f29 3625 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3626 struct rpc_task *task;
5138fde0
TM		 3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3629 .rpc_cred = cred,
3630 };
c970aa85
TM		 3631 struct rpc_task_setup task_setup_data = {
3632 .rpc_client = server->client,
5138fde0 3633 .rpc_message = &msg,
c970aa85
TM		 3634 .callback_ops = &nfs4_delegreturn_ops,
3635 .flags = RPC_TASK_ASYNC,
3636 };
e6f81075 3637 int status = 0;
fe650407 3638
938e1010 3639 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3640 if (data == NULL)
3641 return -ENOMEM;
3642 data->args.fhandle = &data->fh;
3643 data->args.stateid = &data->stateid;
fa178f29 3644 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3645 nfs_copy_fh(&data->fh, NFS_FH(inode));
3646 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3647 data->res.fattr = &data->fattr;
3648 data->res.server = server;
5f7dbd5c 3649 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3650 nfs_fattr_init(data->res.fattr);
26e976a8 3651 data->timestamp = jiffies;
fe650407
TM		 3652 data->rpc_status = 0;
3653
c970aa85 3654 task_setup_data.callback_data = data;
5138fde0
TM		 3655 msg.rpc_argp = &data->args,
3656 msg.rpc_resp = &data->res,
c970aa85 3657 task = rpc_run_task(&task_setup_data);
7a1218a2 3658 if (IS_ERR(task))
fe650407 3659 return PTR_ERR(task);
e6f81075
TM		 3660 if (!issync)
3661 goto out;
fe650407 3662 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3663 if (status != 0)
3664 goto out;
3665 status = data->rpc_status;
3666 if (status != 0)
3667 goto out;
3668 nfs_refresh_inode(inode, &data->fattr);
3669out:
e6b3c4db 3670 rpc_put_task(task);
fe650407 3671 return status;
1da177e4
LT		 3672}
3673
e6f81075 3674int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3675{
3676 struct nfs_server *server = NFS_SERVER(inode);
3677 struct nfs4_exception exception = { };
3678 int err;
3679 do {
e6f81075 3680 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3681 switch (err) {
3682 case -NFS4ERR_STALE_STATEID:
3683 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3684 case 0:
3685 return 0;
3686 }
3687 err = nfs4_handle_exception(server, err, &exception);
3688 } while (exception.retry);
3689 return err;
3690}
3691
3692#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3693#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3694
3695/*
3696 * sleep, with exponential backoff, and retry the LOCK operation.
3697 */
3698static unsigned long
3699nfs4_set_lock_task_retry(unsigned long timeout)
3700{
150030b7 3701 schedule_timeout_killable(timeout);
1da177e4
LT		 3702 timeout <<= 1;
3703 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3704 return NFS4_LOCK_MAXTIMEOUT;
3705 return timeout;
3706}
3707
1da177e4
LT		 3708static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3709{
3710 struct inode *inode = state->inode;
3711 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3712 struct nfs_client *clp = server->nfs_client;
911d1aaf 3713 struct nfs_lockt_args arg = {
1da177e4 3714 .fh = NFS_FH(inode),
911d1aaf 3715 .fl = request,
1da177e4 3716 };
911d1aaf
TM		 3717 struct nfs_lockt_res res = {
3718 .denied = request,
1da177e4
LT		 3719 };
3720 struct rpc_message msg = {
3721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3722 .rpc_argp = &arg,
3723 .rpc_resp = &res,
3724 .rpc_cred = state->owner->so_cred,
3725 };
1da177e4
LT		 3726 struct nfs4_lock_state *lsp;
3727 int status;
3728
911d1aaf 3729 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3730 status = nfs4_set_lock_state(state, request);
3731 if (status != 0)
3732 goto out;
3733 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3734 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3735 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3736 switch (status) {
3737 case 0:
3738 request->fl_type = F_UNLCK;
3739 break;
3740 case -NFS4ERR_DENIED:
3741 status = 0;
1da177e4 3742 }
70cc6487 3743 request->fl_ops->fl_release_private(request);
8d0a8a9d 3744out:
1da177e4
LT		 3745 return status;
3746}
3747
3748static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3749{
3750 struct nfs4_exception exception = { };
3751 int err;
3752
3753 do {
3754 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3755 _nfs4_proc_getlk(state, cmd, request),
3756 &exception);
3757 } while (exception.retry);
3758 return err;
3759}
3760
3761static int do_vfs_lock(struct file *file, struct file_lock *fl)
3762{
3763 int res = 0;
3764 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3765 case FL_POSIX:
3766 res = posix_lock_file_wait(file, fl);
3767 break;
3768 case FL_FLOCK:
3769 res = flock_lock_file_wait(file, fl);
3770 break;
3771 default:
3772 BUG();
3773 }
1da177e4
LT		 3774 return res;
3775}
3776
faf5f49c 3777struct nfs4_unlockdata {
911d1aaf
TM		 3778 struct nfs_locku_args arg;
3779 struct nfs_locku_res res;
faf5f49c
TM		 3780 struct nfs4_lock_state *lsp;
3781 struct nfs_open_context *ctx;
911d1aaf
TM		 3782 struct file_lock fl;
3783 const struct nfs_server *server;
26e976a8 3784 unsigned long timestamp;
faf5f49c
TM		 3785};
3786
911d1aaf
TM		 3787static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3788 struct nfs_open_context *ctx,
3789 struct nfs4_lock_state *lsp,
3790 struct nfs_seqid *seqid)
3791{
3792 struct nfs4_unlockdata *p;
3793 struct inode *inode = lsp->ls_state->inode;
3794
a893693c 3795 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3796 if (p == NULL)
3797 return NULL;
3798 p->arg.fh = NFS_FH(inode);
3799 p->arg.fl = &p->fl;
3800 p->arg.seqid = seqid;
c1d51931 3801 p->res.seqid = seqid;
5f7dbd5c 3802 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3803 p->arg.stateid = &lsp->ls_stateid;
3804 p->lsp = lsp;
3805 atomic_inc(&lsp->ls_count);
3806 /* Ensure we don't close file until we're done freeing locks! */
3807 p->ctx = get_nfs_open_context(ctx);
3808 memcpy(&p->fl, fl, sizeof(p->fl));
3809 p->server = NFS_SERVER(inode);
3810 return p;
3811}
3812
06f814a3 3813static void nfs4_locku_release_calldata(void *data)
faf5f49c 3814{
963d8fe5 3815 struct nfs4_unlockdata *calldata = data;
911d1aaf 3816 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3817 nfs4_put_lock_state(calldata->lsp);
3818 put_nfs_open_context(calldata->ctx);
3819 kfree(calldata);
faf5f49c
TM		 3820}
3821
963d8fe5 3822static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3823{
963d8fe5 3824 struct nfs4_unlockdata *calldata = data;
faf5f49c 3825
a893693c
AA		 3826 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3827 task->tk_status);
06f814a3
TM		 3828 if (RPC_ASSASSINATED(task))
3829 return;
faf5f49c
TM		 3830 switch (task->tk_status) {
3831 case 0:
3832 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3833 calldata->res.stateid.data,
faf5f49c 3834 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3835 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3836 break;
9e33bed5
TM		 3837 case -NFS4ERR_BAD_STATEID:
3838 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3839 case -NFS4ERR_STALE_STATEID:
3840 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3841 break;
3842 default:
9e33bed5 3843 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3844 nfs_restart_rpc(task,
d61e612a 3845 calldata->server->nfs_client);
faf5f49c 3846 }
faf5f49c
TM		 3847}
3848
4ce70ada 3849static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3850{
4ce70ada 3851 struct nfs4_unlockdata *calldata = data;
faf5f49c 3852
911d1aaf 3853 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3854 return;
3855 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3856 /* Note: exit _without_ running nfs4_locku_done */
3857 task->tk_action = NULL;
faf5f49c
TM		 3858 return;
3859 }
26e976a8 3860 calldata->timestamp = jiffies;
a893693c
AA		 3861 if (nfs4_setup_sequence(calldata->server->nfs_client,
3862 &calldata->arg.seq_args,
3863 &calldata->res.seq_res, 1, task))
3864 return;
5138fde0 3865 rpc_call_start(task);
faf5f49c
TM		 3866}
3867
963d8fe5 3868static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3869 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3870 .rpc_call_done = nfs4_locku_done,
06f814a3 3871 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3872};
3873
a5d16a4d
TM		 3874static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3875 struct nfs_open_context *ctx,
3876 struct nfs4_lock_state *lsp,
3877 struct nfs_seqid *seqid)
3878{
3879 struct nfs4_unlockdata *data;
5138fde0
TM		 3880 struct rpc_message msg = {
3881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3882 .rpc_cred = ctx->cred,
3883 };
c970aa85
TM		 3884 struct rpc_task_setup task_setup_data = {
3885 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3886 .rpc_message = &msg,
c970aa85 3887 .callback_ops = &nfs4_locku_ops,
101070ca 3888 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3889 .flags = RPC_TASK_ASYNC,
3890 };
a5d16a4d 3891
137d6aca
FF		 3892 /* Ensure this is an unlock - when canceling a lock, the
3893 * canceled lock is passed in, and it won't be an unlock.
3894 */
3895 fl->fl_type = F_UNLCK;
3896
a5d16a4d
TM		 3897 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3898 if (data == NULL) {
3899 nfs_free_seqid(seqid);
3900 return ERR_PTR(-ENOMEM);
3901 }
3902
5138fde0
TM		 3903 msg.rpc_argp = &data->arg,
3904 msg.rpc_resp = &data->res,
c970aa85
TM		 3905 task_setup_data.callback_data = data;
3906 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3907}
3908
faf5f49c
TM		 3909static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3910{
19e03c57 3911 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3912 struct nfs_seqid *seqid;
1da177e4 3913 struct nfs4_lock_state *lsp;
06f814a3
TM		 3914 struct rpc_task *task;
3915 int status = 0;
536ff0f8 3916 unsigned char fl_flags = request->fl_flags;
faf5f49c 3917
8d0a8a9d 3918 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3919 /* Unlock _before_ we do the RPC call */
3920 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3921 down_read(&nfsi->rwsem);
3922 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3923 up_read(&nfsi->rwsem);
9b073574 3924 goto out;
19e03c57
TM		 3925 }
3926 up_read(&nfsi->rwsem);
8d0a8a9d 3927 if (status != 0)
9b073574
TM		 3928 goto out;
3929 /* Is this a delegated lock? */
3930 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3931 goto out;
8d0a8a9d 3932 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3933 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3934 status = -ENOMEM;
911d1aaf 3935 if (seqid == NULL)
9b073574 3936 goto out;
cd3758e3 3937 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3938 status = PTR_ERR(task);
3939 if (IS_ERR(task))
9b073574 3940 goto out;
a5d16a4d 3941 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3942 rpc_put_task(task);
9b073574 3943out:
536ff0f8 3944 request->fl_flags = fl_flags;
1da177e4
LT		 3945 return status;
3946}
3947
a5d16a4d
TM		 3948struct nfs4_lockdata {
3949 struct nfs_lock_args arg;
3950 struct nfs_lock_res res;
3951 struct nfs4_lock_state *lsp;
3952 struct nfs_open_context *ctx;
3953 struct file_lock fl;
26e976a8 3954 unsigned long timestamp;
a5d16a4d
TM		 3955 int rpc_status;
3956 int cancelled;
66179efe 3957 struct nfs_server *server;
a5d16a4d
TM		 3958};
3959
3960static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3961 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3962{
a5d16a4d
TM		 3963 struct nfs4_lockdata *p;
3964 struct inode *inode = lsp->ls_state->inode;
1da177e4 3965 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3966
3967 p = kzalloc(sizeof(*p), GFP_KERNEL);
3968 if (p == NULL)
3969 return NULL;
3970
3971 p->arg.fh = NFS_FH(inode);
3972 p->arg.fl = &p->fl;
2f74c0a0
TM		 3973 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3974 if (p->arg.open_seqid == NULL)
3975 goto out_free;
a5d16a4d
TM		 3976 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3977 if (p->arg.lock_seqid == NULL)
2f74c0a0 3978 goto out_free_seqid;
a5d16a4d 3979 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3980 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3981 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3982 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3983 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3984 p->lsp = lsp;
66179efe 3985 p->server = server;
a5d16a4d
TM		 3986 atomic_inc(&lsp->ls_count);
3987 p->ctx = get_nfs_open_context(ctx);
3988 memcpy(&p->fl, fl, sizeof(p->fl));
3989 return p;
2f74c0a0
TM		 3990out_free_seqid:
3991 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3992out_free:
3993 kfree(p);
3994 return NULL;
3995}
3996
3997static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3998{
3999 struct nfs4_lockdata *data = calldata;
4000 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4001
3110ff80 4002 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4003 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4004 return;
a5d16a4d
TM		 4005 /* Do we need to do an open_to_lock_owner? */
4006 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4007 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4008 return;
a5d16a4d
TM		 4009 data->arg.open_stateid = &state->stateid;
4010 data->arg.new_lock_owner = 1;
c1d51931 4011 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4012 } else
4013 data->arg.new_lock_owner = 0;
26e976a8 4014 data->timestamp = jiffies;
66179efe
AA		 4015 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4016 &data->res.seq_res, 1, task))
4017 return;
5138fde0 4018 rpc_call_start(task);
3110ff80 4019 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4020}
4021
b257957e
AB		 4022static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4023{
4024 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4025 nfs4_lock_prepare(task, calldata);
4026}
4027
a5d16a4d
TM		 4028static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4029{
4030 struct nfs4_lockdata *data = calldata;
4031
3110ff80 4032 dprintk("%s: begin!\n", __func__);
a5d16a4d 4033
d61e612a
TM		 4034 nfs4_sequence_done(data->server, &data->res.seq_res,
4035 task->tk_status);
66179efe 4036
a5d16a4d
TM		 4037 data->rpc_status = task->tk_status;
4038 if (RPC_ASSASSINATED(task))
4039 goto out;
4040 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4041 if (data->rpc_status == 0)
4042 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4043 else
4044 goto out;
4045 }
4046 if (data->rpc_status == 0) {
4047 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4048 sizeof(data->lsp->ls_stateid.data));
4049 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4050 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4051 }
a5d16a4d 4052out:
3110ff80 4053 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4054}
4055
4056static void nfs4_lock_release(void *calldata)
4057{
4058 struct nfs4_lockdata *data = calldata;
4059
3110ff80 4060 dprintk("%s: begin!\n", __func__);
2f74c0a0 4061 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4062 if (data->cancelled != 0) {
4063 struct rpc_task *task;
4064 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4065 data->arg.lock_seqid);
4066 if (!IS_ERR(task))
e6b3c4db 4067 rpc_put_task(task);
3110ff80 4068 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4069 } else
4070 nfs_free_seqid(data->arg.lock_seqid);
4071 nfs4_put_lock_state(data->lsp);
4072 put_nfs_open_context(data->ctx);
4073 kfree(data);
3110ff80 4074 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4075}
4076
4077static const struct rpc_call_ops nfs4_lock_ops = {
4078 .rpc_call_prepare = nfs4_lock_prepare,
4079 .rpc_call_done = nfs4_lock_done,
4080 .rpc_release = nfs4_lock_release,
4081};
4082
b257957e
AB		 4083static const struct rpc_call_ops nfs4_recover_lock_ops = {
4084 .rpc_call_prepare = nfs4_recover_lock_prepare,
4085 .rpc_call_done = nfs4_lock_done,
4086 .rpc_release = nfs4_lock_release,
4087};
4088
2bee72a6
TM		 4089static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4090{
4091 struct nfs_client *clp = server->nfs_client;
4092 struct nfs4_state *state = lsp->ls_state;
4093
4094 switch (error) {
4095 case -NFS4ERR_ADMIN_REVOKED:
4096 case -NFS4ERR_BAD_STATEID:
4097 case -NFS4ERR_EXPIRED:
4098 if (new_lock_owner != 0 ||
4099 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4100 nfs4_state_mark_reclaim_nograce(clp, state);
4101 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4102 };
4103}
4104
afe6c27c 4105static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4106{
4107 struct nfs4_lockdata *data;
4108 struct rpc_task *task;
5138fde0
TM		 4109 struct rpc_message msg = {
4110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4111 .rpc_cred = state->owner->so_cred,
4112 };
c970aa85
TM		 4113 struct rpc_task_setup task_setup_data = {
4114 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4115 .rpc_message = &msg,
c970aa85 4116 .callback_ops = &nfs4_lock_ops,
101070ca 4117 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4118 .flags = RPC_TASK_ASYNC,
4119 };
a5d16a4d
TM		 4120 int ret;
4121
3110ff80 4122 dprintk("%s: begin!\n", __func__);
cd3758e3 4123 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4124 fl->fl_u.nfs4_fl.owner);
4125 if (data == NULL)
4126 return -ENOMEM;
4127 if (IS_SETLKW(cmd))
4128 data->arg.block = 1;
b257957e
AB		 4129 if (recovery_type > NFS_LOCK_NEW) {
4130 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4131 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4132 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4133 }
5138fde0
TM		 4134 msg.rpc_argp = &data->arg,
4135 msg.rpc_resp = &data->res,
c970aa85
TM		 4136 task_setup_data.callback_data = data;
4137 task = rpc_run_task(&task_setup_data);
7a1218a2 4138 if (IS_ERR(task))
a5d16a4d 4139 return PTR_ERR(task);
a5d16a4d
TM		 4140 ret = nfs4_wait_for_completion_rpc_task(task);
4141 if (ret == 0) {
4142 ret = data->rpc_status;
2bee72a6
TM		 4143 if (ret)
4144 nfs4_handle_setlk_error(data->server, data->lsp,
4145 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4146 } else
4147 data->cancelled = 1;
e6b3c4db 4148 rpc_put_task(task);
3110ff80 4149 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4150 return ret;
1da177e4
LT		 4151}
4152
4153static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4154{
202b50dc
TM		 4155 struct nfs_server *server = NFS_SERVER(state->inode);
4156 struct nfs4_exception exception = { };
4157 int err;
4158
4159 do {
42a2d13e
TM		 4160 /* Cache the lock if possible... */
4161 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4162 return 0;
afe6c27c 4163 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
202b50dc
TM		 4164 if (err != -NFS4ERR_DELAY)
4165 break;
4166 nfs4_handle_exception(server, err, &exception);
4167 } while (exception.retry);
4168 return err;
1da177e4
LT		 4169}
4170
4171static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4172{
202b50dc
TM		 4173 struct nfs_server *server = NFS_SERVER(state->inode);
4174 struct nfs4_exception exception = { };
4175 int err;
4176
6bfc93ef
TM		 4177 err = nfs4_set_lock_state(state, request);
4178 if (err != 0)
4179 return err;
202b50dc 4180 do {
42a2d13e
TM		 4181 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4182 return 0;
afe6c27c 4183 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4184 switch (err) {
4185 default:
4186 goto out;
4187 case -NFS4ERR_GRACE:
4188 case -NFS4ERR_DELAY:
4189 nfs4_handle_exception(server, err, &exception);
4190 err = 0;
4191 }
202b50dc 4192 } while (exception.retry);
a9ed2e25 4193out:
202b50dc 4194 return err;
1da177e4
LT		 4195}
4196
4197static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4198{
19e03c57 4199 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4200 unsigned char fl_flags = request->fl_flags;
8e469ebd 4201 int status = -ENOLCK;
1da177e4 4202
8e469ebd
TM		 4203 if ((fl_flags & FL_POSIX) &&
4204 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4205 goto out;
6bfc93ef 4206 /* Is this a delegated open? */
6bfc93ef
TM		 4207 status = nfs4_set_lock_state(state, request);
4208 if (status != 0)
4209 goto out;
01c3b861
TM		 4210 request->fl_flags |= FL_ACCESS;
4211 status = do_vfs_lock(request->fl_file, request);
4212 if (status < 0)
4213 goto out;
19e03c57 4214 down_read(&nfsi->rwsem);
01c3b861 4215 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4216 /* Yes: cache locks! */
01c3b861 4217 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4218 request->fl_flags = fl_flags & ~FL_SLEEP;
4219 status = do_vfs_lock(request->fl_file, request);
4220 goto out_unlock;
01c3b861 4221 }
afe6c27c 4222 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4223 if (status != 0)
01c3b861 4224 goto out_unlock;
6bfc93ef 4225 /* Note: we always want to sleep here! */
01c3b861 4226 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4227 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4228 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4229out_unlock:
19e03c57 4230 up_read(&nfsi->rwsem);
01c3b861
TM		 4231out:
4232 request->fl_flags = fl_flags;
1da177e4
LT		 4233 return status;
4234}
4235
4236static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4237{
4238 struct nfs4_exception exception = { };
4239 int err;
4240
4241 do {
965b5d67
TM		 4242 err = _nfs4_proc_setlk(state, cmd, request);
4243 if (err == -NFS4ERR_DENIED)
4244 err = -EAGAIN;
1da177e4 4245 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4246 err, &exception);
1da177e4
LT		 4247 } while (exception.retry);
4248 return err;
4249}
4250
4251static int
4252nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4253{
4254 struct nfs_open_context *ctx;
4255 struct nfs4_state *state;
4256 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4257 int status;
4258
4259 /* verify open state */
cd3758e3 4260 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4261 state = ctx->state;
4262
4263 if (request->fl_start < 0 || request->fl_end < 0)
4264 return -EINVAL;
4265
d953126a
TM		 4266 if (IS_GETLK(cmd)) {
4267 if (state != NULL)
4268 return nfs4_proc_getlk(state, F_GETLK, request);
4269 return 0;
4270 }
1da177e4
LT		 4271
4272 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4273 return -EINVAL;
4274
d953126a
TM		 4275 if (request->fl_type == F_UNLCK) {
4276 if (state != NULL)
4277 return nfs4_proc_unlck(state, cmd, request);
4278 return 0;
4279 }
1da177e4 4280
d953126a
TM		 4281 if (state == NULL)
4282 return -ENOLCK;
1da177e4
LT		 4283 do {
4284 status = nfs4_proc_setlk(state, cmd, request);
4285 if ((status != -EAGAIN) || IS_SETLK(cmd))
4286 break;
4287 timeout = nfs4_set_lock_task_retry(timeout);
4288 status = -ERESTARTSYS;
4289 if (signalled())
4290 break;
4291 } while(status < 0);
1da177e4
LT		 4292 return status;
4293}
4294
888e694c
TM		 4295int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4296{
4297 struct nfs_server *server = NFS_SERVER(state->inode);
4298 struct nfs4_exception exception = { };
4299 int err;
4300
4301 err = nfs4_set_lock_state(state, fl);
4302 if (err != 0)
4303 goto out;
4304 do {
afe6c27c 4305 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4306 switch (err) {
4307 default:
4308 printk(KERN_ERR "%s: unhandled error %d.\n",
4309 __func__, err);
4310 case 0:
965b5d67 4311 case -ESTALE:
d5122201
TM		 4312 goto out;
4313 case -NFS4ERR_EXPIRED:
4314 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4315 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4316 case -NFS4ERR_BADSESSION:
4317 case -NFS4ERR_BADSLOT:
4318 case -NFS4ERR_BAD_HIGH_SLOT:
4319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4320 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4321 nfs4_schedule_state_recovery(server->nfs_client);
4322 goto out;
965b5d67
TM		 4323 case -ERESTARTSYS:
4324 /*
4325 * The show must go on: exit, but mark the
4326 * stateid as needing recovery.
4327 */
4328 case -NFS4ERR_ADMIN_REVOKED:
4329 case -NFS4ERR_BAD_STATEID:
4330 case -NFS4ERR_OPENMODE:
4331 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4332 err = 0;
4333 goto out;
4334 case -ENOMEM:
4335 case -NFS4ERR_DENIED:
4336 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4337 err = 0;
4338 goto out;
d5122201
TM		 4339 case -NFS4ERR_DELAY:
4340 break;
4341 }
888e694c
TM		 4342 err = nfs4_handle_exception(server, err, &exception);
4343 } while (exception.retry);
4344out:
4345 return err;
4346}
6b3b5496 4347
aa1870af
BF		 4348#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4349
6b3b5496
BF		 4350int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4351 size_t buflen, int flags)
4352{
4b580ee3
BF		 4353 struct inode *inode = dentry->d_inode;
4354
4355 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4356 return -EOPNOTSUPP;
4357
4b580ee3 4358 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4359}
4360
4361/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4362 * and that's what we'll do for e.g. user attributes that haven't been set.
4363 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4364 * attributes in kernel-managed attribute namespaces. */
4365ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4366 size_t buflen)
4367{
aa1870af
BF		 4368 struct inode *inode = dentry->d_inode;
4369
4370 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4371 return -EOPNOTSUPP;
4372
4373 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4374}
4375
4376ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4377{
aa1870af 4378 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4379
096455a2
BF		 4380 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4381 return 0;
6b3b5496
BF		 4382 if (buf && buflen < len)
4383 return -ERANGE;
4384 if (buf)
aa1870af
BF		 4385 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4386 return len;
6b3b5496
BF		 4387}
4388
69aaaae1
TM		 4389static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4390{
4391 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4392 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4393 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4394 return;
4395
4396 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4397 NFS_ATTR_FATTR_NLINK;
4398 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4399 fattr->nlink = 2;
4400}
4401
56659e99 4402int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4403 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4404{
4405 struct nfs_server *server = NFS_SERVER(dir);
4406 u32 bitmask[2] = {
361e624f
MN		 4407 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4408 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4409 };
4410 struct nfs4_fs_locations_arg args = {
4411 .dir_fh = NFS_FH(dir),
c228fd3a 4412 .name = name,
683b57b4
TM		 4413 .page = page,
4414 .bitmask = bitmask,
4415 };
22958463
BH		 4416 struct nfs4_fs_locations_res res = {
4417 .fs_locations = fs_locations,
4418 };
683b57b4
TM		 4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4421 .rpc_argp = &args,
22958463 4422 .rpc_resp = &res,
683b57b4
TM		 4423 };
4424 int status;
4425
3110ff80 4426 dprintk("%s: start\n", __func__);
c228fd3a 4427 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4428 fs_locations->server = server;
830b8e33 4429 fs_locations->nlocations = 0;
cccef3b9 4430 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4431 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4432 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4433 return status;
4434}
4435
557134a3 4436#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4437/*
4438 * nfs4_proc_exchange_id()
4439 *
4440 * Since the clientid has expired, all compounds using sessions
4441 * associated with the stale clientid will be returning
4442 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4443 * be in some phase of session reset.
4444 */
4d643d1d 4445int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4446{
4447 nfs4_verifier verifier;
4448 struct nfs41_exchange_id_args args = {
4449 .client = clp,
4450 .flags = clp->cl_exchange_flags,
4451 };
4452 struct nfs41_exchange_id_res res = {
4453 .client = clp,
4454 };
4455 int status;
4456 struct rpc_message msg = {
4457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4458 .rpc_argp = &args,
4459 .rpc_resp = &res,
4460 .rpc_cred = cred,
4461 };
4462 __be32 *p;
4463
4464 dprintk("--> %s\n", __func__);
4465 BUG_ON(clp == NULL);
a7b72103 4466
7b183d0d
AB		 4467 /* Remove server-only flags */
4468 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4469
99fe60d0
BH		 4470 p = (u32 *)verifier.data;
4471 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4472 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4473 args.verifier = &verifier;
4474
4475 while (1) {
4476 args.id_len = scnprintf(args.id, sizeof(args.id),
4477 "%s/%s %u",
4478 clp->cl_ipaddr,
4479 rpc_peeraddr2str(clp->cl_rpcclient,
4480 RPC_DISPLAY_ADDR),
4481 clp->cl_id_uniquifier);
4482
4483 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4484
4485 if (status != NFS4ERR_CLID_INUSE)
4486 break;
4487
4488 if (signalled())
4489 break;
4490
4491 if (++clp->cl_id_uniquifier == 0)
4492 break;
4493 }
4494
4495 dprintk("<-- %s status= %d\n", __func__, status);
4496 return status;
4497}
4498
2050f0cc
AA		 4499struct nfs4_get_lease_time_data {
4500 struct nfs4_get_lease_time_args *args;
4501 struct nfs4_get_lease_time_res *res;
4502 struct nfs_client *clp;
4503};
4504
4505static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4506 void *calldata)
4507{
4508 int ret;
4509 struct nfs4_get_lease_time_data *data =
4510 (struct nfs4_get_lease_time_data *)calldata;
4511
4512 dprintk("--> %s\n", __func__);
689cf5c1 4513 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4514 /* just setup sequence, do not trigger session recovery
4515 since we're invoked within one */
4516 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4517 &data->args->la_seq_args,
4518 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4519
4520 BUG_ON(ret == -EAGAIN);
4521 rpc_call_start(task);
4522 dprintk("<-- %s\n", __func__);
4523}
4524
4525/*
4526 * Called from nfs4_state_manager thread for session setup, so don't recover
4527 * from sequence operation or clientid errors.
4528 */
4529static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4530{
4531 struct nfs4_get_lease_time_data *data =
4532 (struct nfs4_get_lease_time_data *)calldata;
4533
4534 dprintk("--> %s\n", __func__);
4535 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4536 switch (task->tk_status) {
4537 case -NFS4ERR_DELAY:
4538 case -NFS4ERR_GRACE:
4539 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4540 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4541 task->tk_status = 0;
0110ee15 4542 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4543 return;
4544 }
2050f0cc
AA		 4545 dprintk("<-- %s\n", __func__);
4546}
4547
4548struct rpc_call_ops nfs4_get_lease_time_ops = {
4549 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4550 .rpc_call_done = nfs4_get_lease_time_done,
4551};
4552
4553int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4554{
4555 struct rpc_task *task;
4556 struct nfs4_get_lease_time_args args;
4557 struct nfs4_get_lease_time_res res = {
4558 .lr_fsinfo = fsinfo,
4559 };
4560 struct nfs4_get_lease_time_data data = {
4561 .args = &args,
4562 .res = &res,
4563 .clp = clp,
4564 };
4565 struct rpc_message msg = {
4566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4567 .rpc_argp = &args,
4568 .rpc_resp = &res,
4569 };
4570 struct rpc_task_setup task_setup = {
4571 .rpc_client = clp->cl_rpcclient,
4572 .rpc_message = &msg,
4573 .callback_ops = &nfs4_get_lease_time_ops,
4574 .callback_data = &data
4575 };
4576 int status;
4577
4578 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4579 dprintk("--> %s\n", __func__);
4580 task = rpc_run_task(&task_setup);
4581
4582 if (IS_ERR(task))
4583 status = PTR_ERR(task);
4584 else {
4585 status = task->tk_status;
4586 rpc_put_task(task);
4587 }
4588 dprintk("<-- %s return %d\n", __func__, status);
4589
4590 return status;
4591}
4592
b73dafa7
RL		 4593/*
4594 * Reset a slot table
4595 */
4596static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4597 int old_max_slots, int ivalue)
ac72b7b3 4598{
b73dafa7 4599 int i;
ac72b7b3
AA		 4600 int ret = 0;
4601
b73dafa7 4602 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4603
b73dafa7
RL		 4604 /*
4605 * Until we have dynamic slot table adjustment, insist
4606 * upon the same slot table size
4607 */
ac72b7b3
AA		 4608 if (max_slots != old_max_slots) {
4609 dprintk("%s reset slot table does't match old\n",
4610 __func__);
4611 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4612 goto out;
4613 }
4614 spin_lock(&tbl->slot_tbl_lock);
4615 for (i = 0; i < max_slots; ++i)
b73dafa7 4616 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4617 spin_unlock(&tbl->slot_tbl_lock);
4618 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4619 tbl, tbl->slots, tbl->max_slots);
4620out:
4621 dprintk("<-- %s: return %d\n", __func__, ret);
4622 return ret;
4623}
4624
b73dafa7
RL		 4625/*
4626 * Reset the forechannel and backchannel slot tables
4627 */
4628static int nfs4_reset_slot_tables(struct nfs4_session *session)
4629{
4630 int status;
4631
4632 status = nfs4_reset_slot_table(&session->fc_slot_table,
4633 session->fc_attrs.max_reqs,
4634 session->fc_slot_table.max_slots,
4635 1);
f8625a6a
RL		 4636 if (status)
4637 return status;
4638
4639 status = nfs4_reset_slot_table(&session->bc_slot_table,
4640 session->bc_attrs.max_reqs,
4641 session->bc_slot_table.max_slots,
4642 0);
b73dafa7
RL		 4643 return status;
4644}
4645
f8625a6a
RL		 4646/* Destroy the slot table */
4647static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4648{
4649 if (session->fc_slot_table.slots != NULL) {
4650 kfree(session->fc_slot_table.slots);
4651 session->fc_slot_table.slots = NULL;
4652 }
4653 if (session->bc_slot_table.slots != NULL) {
4654 kfree(session->bc_slot_table.slots);
4655 session->bc_slot_table.slots = NULL;
4656 }
4657 return;
4658}
4659
fc931582
AA		 4660/*
4661 * Initialize slot table
4662 */
050047ce
RL		 4663static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4664 int max_slots, int ivalue)
fc931582 4665{
fc931582
AA		 4666 struct nfs4_slot *slot;
4667 int ret = -ENOMEM;
4668
4669 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4670
050047ce 4671 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4672
4673 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4674 if (!slot)
4675 goto out;
fc931582
AA		 4676 ret = 0;
4677
4678 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4679 tbl->max_slots = max_slots;
4680 tbl->slots = slot;
4681 tbl->highest_used_slotid = -1; /* no slot is currently used */
4682 spin_unlock(&tbl->slot_tbl_lock);
4683 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4684 tbl, tbl->slots, tbl->max_slots);
4685out:
4686 dprintk("<-- %s: return %d\n", __func__, ret);
4687 return ret;
fc931582
AA		 4688}
4689
050047ce
RL		 4690/*
4691 * Initialize the forechannel and backchannel tables
4692 */
4693static int nfs4_init_slot_tables(struct nfs4_session *session)
4694{
f26468fb
TM		 4695 struct nfs4_slot_table *tbl;
4696 int status = 0;
050047ce 4697
f26468fb
TM		 4698 tbl = &session->fc_slot_table;
4699 if (tbl->slots == NULL) {
4700 status = nfs4_init_slot_table(tbl,
4701 session->fc_attrs.max_reqs, 1);
4702 if (status)
4703 return status;
4704 }
050047ce 4705
f26468fb
TM		 4706 tbl = &session->bc_slot_table;
4707 if (tbl->slots == NULL) {
4708 status = nfs4_init_slot_table(tbl,
4709 session->bc_attrs.max_reqs, 0);
4710 if (status)
4711 nfs4_destroy_slot_tables(session);
4712 }
f8625a6a
RL		 4713
4714 return status;
557134a3
AA		 4715}
4716
4717struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4718{
4719 struct nfs4_session *session;
4720 struct nfs4_slot_table *tbl;
4721
4722 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4723 if (!session)
4724 return NULL;
76db6d95 4725
76db6d95
AA		 4726 /*
4727 * The create session reply races with the server back
4728 * channel probe. Mark the client NFS_CS_SESSION_INITING
4729 * so that the client back channel can find the
4730 * nfs_client struct
4731 */
4732 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4733 init_completion(&session->complete);
76db6d95 4734
557134a3 4735 tbl = &session->fc_slot_table;
9dfdf404 4736 tbl->highest_used_slotid = -1;
557134a3 4737 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4738 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4739
4740 tbl = &session->bc_slot_table;
9dfdf404 4741 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4742 spin_lock_init(&tbl->slot_tbl_lock);
4743 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4744
557134a3
AA		 4745 session->clp = clp;
4746 return session;
4747}
4748
4749void nfs4_destroy_session(struct nfs4_session *session)
4750{
5a0ffe54
AA		 4751 nfs4_proc_destroy_session(session);
4752 dprintk("%s Destroy backchannel for xprt %p\n",
4753 __func__, session->clp->cl_rpcclient->cl_xprt);
4754 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4755 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4756 nfs4_destroy_slot_tables(session);
557134a3
AA		 4757 kfree(session);
4758}
4759
fc931582
AA		 4760/*
4761 * Initialize the values to be used by the client in CREATE_SESSION
4762 * If nfs4_init_session set the fore channel request and response sizes,
4763 * use them.
4764 *
4765 * Set the back channel max_resp_sz_cached to zero to force the client to
4766 * always set csa_cachethis to FALSE because the current implementation
4767 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4768 */
4769static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4770{
4771 struct nfs4_session *session = args->client->cl_session;
4772 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4773 mxresp_sz = session->fc_attrs.max_resp_sz;
4774
4775 if (mxrqst_sz == 0)
4776 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4777 if (mxresp_sz == 0)
4778 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4779 /* Fore channel attributes */
4780 args->fc_attrs.headerpadsz = 0;
4781 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4782 args->fc_attrs.max_resp_sz = mxresp_sz;
4783 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4784 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4785 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4786
4787 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4788 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4789 __func__,
4790 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4791 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4792 args->fc_attrs.max_reqs);
4793
4794 /* Back channel attributes */
4795 args->bc_attrs.headerpadsz = 0;
4796 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4797 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4798 args->bc_attrs.max_resp_sz_cached = 0;
4799 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4800 args->bc_attrs.max_reqs = 1;
4801
4802 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4803 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4804 __func__,
4805 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4806 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4807 args->bc_attrs.max_reqs);
4808}
4809
8d35301d
AA		 4810static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4811{
4812 if (rcvd <= sent)
4813 return 0;
4814 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4815 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4816 return -EINVAL;
4817}
4818
4819#define _verify_fore_channel_attr(_name_) \
4820 _verify_channel_attr("fore", #_name_, \
4821 args->fc_attrs._name_, \
4822 session->fc_attrs._name_)
4823
4824#define _verify_back_channel_attr(_name_) \
4825 _verify_channel_attr("back", #_name_, \
4826 args->bc_attrs._name_, \
4827 session->bc_attrs._name_)
4828
4829/*
4830 * The server is not allowed to increase the fore channel header pad size,
4831 * maximum response size, or maximum number of operations.
4832 *
4833 * The back channel attributes are only negotiatied down: We send what the
4834 * (back channel) server insists upon.
4835 */
4836static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4837 struct nfs4_session *session)
4838{
4839 int ret = 0;
4840
4841 ret |= _verify_fore_channel_attr(headerpadsz);
4842 ret |= _verify_fore_channel_attr(max_resp_sz);
4843 ret |= _verify_fore_channel_attr(max_ops);
4844
4845 ret |= _verify_back_channel_attr(headerpadsz);
4846 ret |= _verify_back_channel_attr(max_rqst_sz);
4847 ret |= _verify_back_channel_attr(max_resp_sz);
4848 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4849 ret |= _verify_back_channel_attr(max_ops);
4850 ret |= _verify_back_channel_attr(max_reqs);
4851
4852 return ret;
4853}
4854
fc931582
AA		 4855static int _nfs4_proc_create_session(struct nfs_client *clp)
4856{
4857 struct nfs4_session *session = clp->cl_session;
4858 struct nfs41_create_session_args args = {
4859 .client = clp,
4860 .cb_program = NFS4_CALLBACK,
4861 };
4862 struct nfs41_create_session_res res = {
4863 .client = clp,
4864 };
4865 struct rpc_message msg = {
4866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4867 .rpc_argp = &args,
4868 .rpc_resp = &res,
4869 };
4870 int status;
4871
4872 nfs4_init_channel_attrs(&args);
0f91421e 4873 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4874
4875 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4876
8d35301d
AA		 4877 if (!status)
4878 /* Verify the session's negotiated channel_attrs values */
4879 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4880 if (!status) {
4881 /* Increment the clientid slot sequence id */
4882 clp->cl_seqid++;
4883 }
4884
4885 return status;
4886}
4887
4888/*
4889 * Issues a CREATE_SESSION operation to the server.
4890 * It is the responsibility of the caller to verify the session is
4891 * expired before calling this routine.
4892 */
f26468fb 4893int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4894{
4895 int status;
4896 unsigned *ptr;
fc931582
AA		 4897 struct nfs4_session *session = clp->cl_session;
4898
4899 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4900
4901 status = _nfs4_proc_create_session(clp);
4902 if (status)
4903 goto out;
4904
f26468fb
TM		 4905 /* Init and reset the fore channel */
4906 status = nfs4_init_slot_tables(session);
4907 dprintk("slot table initialization returned %d\n", status);
4908 if (status)
4909 goto out;
4910 status = nfs4_reset_slot_tables(session);
4911 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4912 if (status)
4913 goto out;
4914
4915 ptr = (unsigned *)&session->sess_id.data[0];
4916 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4917 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4918out:
4919 dprintk("<-- %s\n", __func__);
4920 return status;
4921}
4922
0f3e66c6
AA		 4923/*
4924 * Issue the over-the-wire RPC DESTROY_SESSION.
4925 * The caller must serialize access to this routine.
4926 */
4927int nfs4_proc_destroy_session(struct nfs4_session *session)
4928{
4929 int status = 0;
4930 struct rpc_message msg;
4931
4932 dprintk("--> nfs4_proc_destroy_session\n");
4933
4934 /* session is still being setup */
4935 if (session->clp->cl_cons_state != NFS_CS_READY)
4936 return status;
4937
4938 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4939 msg.rpc_argp = session;
4940 msg.rpc_resp = NULL;
4941 msg.rpc_cred = NULL;
4942 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4943
4944 if (status)
4945 printk(KERN_WARNING
4946 "Got error %d from the server on DESTROY_SESSION. "
4947 "Session has been destroyed regardless...\n", status);
4948
4949 dprintk("<-- nfs4_proc_destroy_session\n");
4950 return status;
4951}
4952
fccba804
TM		 4953int nfs4_init_session(struct nfs_server *server)
4954{
4955 struct nfs_client *clp = server->nfs_client;
2449ea2e 4956 struct nfs4_session *session;
68bf05ef 4957 unsigned int rsize, wsize;
fccba804
TM		 4958 int ret;
4959
4960 if (!nfs4_has_session(clp))
4961 return 0;
4962
68bf05ef
AA		 4963 rsize = server->rsize;
4964 if (rsize == 0)
4965 rsize = NFS_MAX_FILE_IO_SIZE;
4966 wsize = server->wsize;
4967 if (wsize == 0)
4968 wsize = NFS_MAX_FILE_IO_SIZE;
4969
2449ea2e 4970 session = clp->cl_session;
68bf05ef
AA		 4971 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
4972 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 4973
fccba804
TM		 4974 ret = nfs4_recover_expired_lease(server);
4975 if (!ret)
4976 ret = nfs4_check_client_ready(clp);
4977 return ret;
4978}
4979
fc01cea9
AA		 4980/*
4981 * Renew the cl_session lease.
4982 */
4983static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4984{
4985 struct nfs4_sequence_args args;
4986 struct nfs4_sequence_res res;
4987
4988 struct rpc_message msg = {
4989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4990 .rpc_argp = &args,
4991 .rpc_resp = &res,
4992 .rpc_cred = cred,
4993 };
4994
4995 args.sa_cache_this = 0;
4996
4997 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 4998 &res, args.sa_cache_this, 1);
fc01cea9
AA		 4999}
5000
5001void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5002{
5003 struct nfs_client *clp = (struct nfs_client *)data;
5004
5005 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
5006
5007 if (task->tk_status < 0) {
5008 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5009
5010 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
5011 == -EAGAIN) {
0110ee15 5012 nfs_restart_rpc(task, clp);
fc01cea9
AA		 5013 return;
5014 }
5015 }
fc01cea9
AA		 5016 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5017
fc01cea9
AA		 5018 kfree(task->tk_msg.rpc_argp);
5019 kfree(task->tk_msg.rpc_resp);
5020
5021 dprintk("<-- %s\n", __func__);
5022}
5023
5024static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5025{
5026 struct nfs_client *clp;
5027 struct nfs4_sequence_args *args;
5028 struct nfs4_sequence_res *res;
5029
5030 clp = (struct nfs_client *)data;
5031 args = task->tk_msg.rpc_argp;
5032 res = task->tk_msg.rpc_resp;
5033
5034 if (nfs4_setup_sequence(clp, args, res, 0, task))
5035 return;
5036 rpc_call_start(task);
5037}
5038
5039static const struct rpc_call_ops nfs41_sequence_ops = {
5040 .rpc_call_done = nfs41_sequence_call_done,
5041 .rpc_call_prepare = nfs41_sequence_prepare,
5042};
5043
5044static int nfs41_proc_async_sequence(struct nfs_client *clp,
5045 struct rpc_cred *cred)
5046{
5047 struct nfs4_sequence_args *args;
5048 struct nfs4_sequence_res *res;
5049 struct rpc_message msg = {
5050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5051 .rpc_cred = cred,
5052 };
5053
5054 args = kzalloc(sizeof(*args), GFP_KERNEL);
5055 if (!args)
5056 return -ENOMEM;
5057 res = kzalloc(sizeof(*res), GFP_KERNEL);
5058 if (!res) {
5059 kfree(args);
5060 return -ENOMEM;
5061 }
5062 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5063 msg.rpc_argp = args;
5064 msg.rpc_resp = res;
5065
5066 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5067 &nfs41_sequence_ops, (void *)clp);
5068}
5069
fce5c838
RL		 5070struct nfs4_reclaim_complete_data {
5071 struct nfs_client *clp;
5072 struct nfs41_reclaim_complete_args arg;
5073 struct nfs41_reclaim_complete_res res;
5074};
5075
5076static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5077{
5078 struct nfs4_reclaim_complete_data *calldata = data;
5079
b257957e 5080 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5081 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5082 &calldata->res.seq_res, 0, task))
5083 return;
5084
5085 rpc_call_start(task);
5086}
5087
5088static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5089{
5090 struct nfs4_reclaim_complete_data *calldata = data;
5091 struct nfs_client *clp = calldata->clp;
5092 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5093
5094 dprintk("--> %s\n", __func__);
5095 nfs41_sequence_done(clp, res, task->tk_status);
5096 switch (task->tk_status) {
5097 case 0:
5098 case -NFS4ERR_COMPLETE_ALREADY:
5099 break;
5100 case -NFS4ERR_BADSESSION:
5101 case -NFS4ERR_DEADSESSION:
5102 /*
5103 * Handle the session error, but do not retry the operation, as
5104 * we have no way of telling whether the clientid had to be
5105 * reset before we got our reply. If reset, a new wave of
5106 * reclaim operations will follow, containing their own reclaim
5107 * complete. We don't want our retry to get on the way of
5108 * recovery by incorrectly indicating to the server that we're
5109 * done reclaiming state since the process had to be restarted.
5110 */
5111 _nfs4_async_handle_error(task, NULL, clp, NULL);
5112 break;
5113 default:
5114 if (_nfs4_async_handle_error(
5115 task, NULL, clp, NULL) == -EAGAIN) {
5116 rpc_restart_call_prepare(task);
5117 return;
5118 }
5119 }
fce5c838
RL		 5120
5121 dprintk("<-- %s\n", __func__);
5122}
5123
5124static void nfs4_free_reclaim_complete_data(void *data)
5125{
5126 struct nfs4_reclaim_complete_data *calldata = data;
5127
5128 kfree(calldata);
5129}
5130
5131static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5132 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5133 .rpc_call_done = nfs4_reclaim_complete_done,
5134 .rpc_release = nfs4_free_reclaim_complete_data,
5135};
5136
5137/*
5138 * Issue a global reclaim complete.
5139 */
5140static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5141{
5142 struct nfs4_reclaim_complete_data *calldata;
5143 struct rpc_task *task;
5144 struct rpc_message msg = {
5145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5146 };
5147 struct rpc_task_setup task_setup_data = {
5148 .rpc_client = clp->cl_rpcclient,
5149 .rpc_message = &msg,
5150 .callback_ops = &nfs4_reclaim_complete_call_ops,
5151 .flags = RPC_TASK_ASYNC,
5152 };
5153 int status = -ENOMEM;
5154
5155 dprintk("--> %s\n", __func__);
5156 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5157 if (calldata == NULL)
5158 goto out;
5159 calldata->clp = clp;
5160 calldata->arg.one_fs = 0;
5161 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5162
5163 msg.rpc_argp = &calldata->arg;
5164 msg.rpc_resp = &calldata->res;
5165 task_setup_data.callback_data = calldata;
5166 task = rpc_run_task(&task_setup_data);
5167 if (IS_ERR(task))
5168 status = PTR_ERR(task);
5169 rpc_put_task(task);
5170out:
5171 dprintk("<-- %s status=%d\n", __func__, status);
5172 return status;
5173}
557134a3
AA		 5174#endif /* CONFIG_NFS_V4_1 */
5175
591d71cb 5176struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5177 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5178 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5179 .recover_open = nfs4_open_reclaim,
5180 .recover_lock = nfs4_lock_reclaim,
591d71cb 5181 .establish_clid = nfs4_init_clientid,
90a16617 5182 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5183};
5184
591d71cb
AA		 5185#if defined(CONFIG_NFS_V4_1)
5186struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5187 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5188 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5189 .recover_open = nfs4_open_reclaim,
5190 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5191 .establish_clid = nfs41_init_clientid,
b4b82607 5192 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5193 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5194};
5195#endif /* CONFIG_NFS_V4_1 */
5196
5197struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5198 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5199 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5200 .recover_open = nfs4_open_expired,
5201 .recover_lock = nfs4_lock_expired,
5202 .establish_clid = nfs4_init_clientid,
90a16617 5203 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5204};
5205
5206#if defined(CONFIG_NFS_V4_1)
5207struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5208 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5209 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5210 .recover_open = nfs4_open_expired,
5211 .recover_lock = nfs4_lock_expired,
4d643d1d 5212 .establish_clid = nfs41_init_clientid,
b4b82607 5213 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5214};
591d71cb 5215#endif /* CONFIG_NFS_V4_1 */
1da177e4 5216
29fba38b
BH		 5217struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5218 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5219 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5220 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5221};
5222
5223#if defined(CONFIG_NFS_V4_1)
5224struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5225 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5226 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5227 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5228};
5229#endif
5230
5231/*
5232 * Per minor version reboot and network partition recovery ops
5233 */
5234
591d71cb
AA		 5235struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5236 &nfs40_reboot_recovery_ops,
5237#if defined(CONFIG_NFS_V4_1)
5238 &nfs41_reboot_recovery_ops,
5239#endif
5240};
5241
5242struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5243 &nfs40_nograce_recovery_ops,
5244#if defined(CONFIG_NFS_V4_1)
5245 &nfs41_nograce_recovery_ops,
5246#endif
5247};
5248
29fba38b
BH		 5249struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5250 &nfs40_state_renewal_ops,
5251#if defined(CONFIG_NFS_V4_1)
5252 &nfs41_state_renewal_ops,
5253#endif
5254};
5255
92e1d5be 5256static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5257 .permission = nfs_permission,
5258 .getattr = nfs_getattr,
5259 .setattr = nfs_setattr,
5260 .getxattr = nfs4_getxattr,
5261 .setxattr = nfs4_setxattr,
5262 .listxattr = nfs4_listxattr,
5263};
5264
509de811 5265const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5266 .version = 4, /* protocol version */
5267 .dentry_ops = &nfs4_dentry_operations,
5268 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5269 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5270 .getroot = nfs4_proc_get_root,
5271 .getattr = nfs4_proc_getattr,
5272 .setattr = nfs4_proc_setattr,
2b3de441 5273 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5274 .lookup = nfs4_proc_lookup,
5275 .access = nfs4_proc_access,
5276 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5277 .create = nfs4_proc_create,
5278 .remove = nfs4_proc_remove,
5279 .unlink_setup = nfs4_proc_unlink_setup,
5280 .unlink_done = nfs4_proc_unlink_done,
5281 .rename = nfs4_proc_rename,
5282 .link = nfs4_proc_link,
5283 .symlink = nfs4_proc_symlink,
5284 .mkdir = nfs4_proc_mkdir,
5285 .rmdir = nfs4_proc_remove,
5286 .readdir = nfs4_proc_readdir,
5287 .mknod = nfs4_proc_mknod,
5288 .statfs = nfs4_proc_statfs,
5289 .fsinfo = nfs4_proc_fsinfo,
5290 .pathconf = nfs4_proc_pathconf,
e9326dca 5291 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5292 .decode_dirent = nfs4_decode_dirent,
5293 .read_setup = nfs4_proc_read_setup,
ec06c096 5294 .read_done = nfs4_read_done,
1da177e4 5295 .write_setup = nfs4_proc_write_setup,
788e7a89 5296 .write_done = nfs4_write_done,
1da177e4 5297 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5298 .commit_done = nfs4_commit_done,
1da177e4 5299 .lock = nfs4_proc_lock,
e50a1c2e 5300 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5301 .close_context = nfs4_close_context,
1da177e4
LT		 5302};
5303
5304/*
5305 * Local variables:
5306 * c-basic-offset: 8
5307 * End:
5308 */
Clone of davem's net-next-2.6 tree