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nfs41: nfs41_setup_state_renewal
[mirror_ubuntu-artful-kernel.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);
1da177e4 67static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 68static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 71
1da177e4 72/* Prevent leaks of NFSv4 errors into userland */
46f72f57 73static int nfs4_map_errors(int err)
1da177e4 74{
52567b03
TM		 75 if (err >= -1000)
76 return err;
77 switch (err) {
78 case -NFS4ERR_RESOURCE:
79 return -EREMOTEIO;
80 default:
1da177e4 81 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 82 __func__, -err);
52567b03 83 break;
1da177e4 84 }
52567b03 85 return -EIO;
1da177e4
LT		 86}
87
88/*
89 * This is our standard bitmap for GETATTR requests.
90 */
91const u32 nfs4_fattr_bitmap[2] = {
92 FATTR4_WORD0_TYPE
93 | FATTR4_WORD0_CHANGE
94 | FATTR4_WORD0_SIZE
95 | FATTR4_WORD0_FSID
96 | FATTR4_WORD0_FILEID,
97 FATTR4_WORD1_MODE
98 | FATTR4_WORD1_NUMLINKS
99 | FATTR4_WORD1_OWNER
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
106};
107
108const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
115};
116
4ce79717 117const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 118 FATTR4_WORD0_MAXLINK
119 | FATTR4_WORD0_MAXNAME,
120 0
121};
122
123const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
127 0
128};
129
830b8e33
MN		 130const u32 nfs4_fs_locations_bitmap[2] = {
131 FATTR4_WORD0_TYPE
132 | FATTR4_WORD0_CHANGE
133 | FATTR4_WORD0_SIZE
134 | FATTR4_WORD0_FSID
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
137 FATTR4_WORD1_MODE
138 | FATTR4_WORD1_NUMLINKS
139 | FATTR4_WORD1_OWNER
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
147};
148
bc4785cd 149static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 150 struct nfs4_readdir_arg *readdir)
151{
0dbb4c67 152 __be32 *start, *p;
1da177e4
LT		 153
154 BUG_ON(readdir->count < 80);
155 if (cookie > 2) {
b7ef1956 156 readdir->cookie = cookie;
1da177e4
LT		 157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
158 return;
159 }
160
161 readdir->cookie = 0;
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
163 if (cookie == 2)
164 return;
165
166 /*
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
171 * instead of 1 or 2.
172 */
0dbb4c67 173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 174
175 if (cookie == 0) {
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
181 p++;
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
4e769b93 185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 186 }
187
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
193 p++;
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
4e769b93 197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 198
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
202}
203
65de872e
TM		 204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
e005e804 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 211 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
9e33bed5 238 struct nfs4_state *state = exception->state;
65de872e
TM		 239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
9e33bed5
TM		 245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
4745e315 258#if !defined(CONFIG_NFS_V4_1)
65de872e 259 break;
4745e315
AA		 260#else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
262 break;
263 /* FALLTHROUGH */
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
0b9e2d41 273 nfs4_schedule_state_recovery(clp);
4745e315 274 exception->retry = 1;
b9179237 275 break;
4745e315 276#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e 277 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
65de872e
TM		 285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
287 ret = nfs4_delay(server->client, &exception->timeout);
288 if (ret != 0)
289 break;
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
292 }
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
295}
296
297
26e976a8 298static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 299{
7539bbab 300 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
305}
306
cccef3b9
AA		 307#if defined(CONFIG_NFS_V4_1)
308
e2c4ab3c
AA		 309/*
310 * nfs4_free_slot - free a slot and efficiently update slot table.
311 *
312 * freeing a slot is trivially done by clearing its respective bit
313 * in the bitmap.
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 321 *
322 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 323 */
324static void
325nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
326{
327 int slotid = free_slotid;
328
e2c4ab3c
AA		 329 /* clear used bit in bitmap */
330 __clear_bit(slotid, tbl->used_slots);
331
332 /* update highest_used_slotid when it is freed */
333 if (slotid == tbl->highest_used_slotid) {
334 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 335 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 336 tbl->highest_used_slotid = slotid;
337 else
338 tbl->highest_used_slotid = -1;
339 }
e2c4ab3c
AA		 340 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
341 free_slotid, tbl->highest_used_slotid);
342}
343
d61e612a 344static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 345 struct nfs4_sequence_res *res)
346{
347 struct nfs4_slot_table *tbl;
348
13615871
AA		 349 tbl = &clp->cl_session->fc_slot_table;
350 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 351 /* just wake up the next guy waiting since
352 * we may have not consumed a slot after all */
691daf3b 353 dprintk("%s: No slot\n", __func__);
35dc1d74 354 return;
13615871 355 }
ea028ac9 356
35dc1d74
TM		 357 spin_lock(&tbl->slot_tbl_lock);
358 nfs4_free_slot(tbl, res->sr_slotid);
359
ea028ac9
AA		 360 /* Signal state manager thread if session is drained */
361 if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
ea028ac9
AA		 362 if (tbl->highest_used_slotid == -1) {
363 dprintk("%s COMPLETE: Session Drained\n", __func__);
364 complete(&clp->cl_session->complete);
365 }
bcb56164 366 } else
691daf3b 367 rpc_wake_up_next(&tbl->slot_tbl_waitq);
35dc1d74
TM		 368 spin_unlock(&tbl->slot_tbl_lock);
369 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 370}
371
b0df806c
AA		 372static void nfs41_sequence_done(struct nfs_client *clp,
373 struct nfs4_sequence_res *res,
374 int rpc_status)
375{
376 unsigned long timestamp;
377 struct nfs4_slot_table *tbl;
378 struct nfs4_slot *slot;
379
380 /*
381 * sr_status remains 1 if an RPC level error occurred. The server
382 * may or may not have processed the sequence operation..
383 * Proceed as if the server received and processed the sequence
384 * operation.
385 */
386 if (res->sr_status == 1)
387 res->sr_status = NFS_OK;
388
389 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
390 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
391 goto out;
392
691daf3b 393 /* Check the SEQUENCE operation status */
b0df806c 394 if (res->sr_status == 0) {
691daf3b
AA		 395 tbl = &clp->cl_session->fc_slot_table;
396 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 397 /* Update the slot's sequence and clientid lease timer */
398 ++slot->seq_nr;
399 timestamp = res->sr_renewal_time;
400 spin_lock(&clp->cl_lock);
401 if (time_before(clp->cl_last_renewal, timestamp))
402 clp->cl_last_renewal = timestamp;
403 spin_unlock(&clp->cl_lock);
0629e370
AB		 404 /* Check sequence flags */
405 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 406 }
407out:
408 /* The session may be reset by one of the error handlers. */
409 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
410 nfs41_sequence_free_slot(clp, res);
411}
412
510b8175
BH		 413/*
414 * nfs4_find_slot - efficiently look for a free slot
415 *
416 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
417 * If found, we mark the slot as used, update the highest_used_slotid,
418 * and respectively set up the sequence operation args.
419 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 420 *
421 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 422 */
423static u8
424nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
425{
426 int slotid;
427 u8 ret_id = NFS4_MAX_SLOT_TABLE;
428 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
429
510b8175
BH		 430 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
431 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
432 tbl->max_slots);
433 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
434 if (slotid >= tbl->max_slots)
435 goto out;
436 __set_bit(slotid, tbl->used_slots);
437 if (slotid > tbl->highest_used_slotid)
438 tbl->highest_used_slotid = slotid;
439 ret_id = slotid;
440out:
441 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
442 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 443 return ret_id;
444}
445
ce5039c1
AA		 446static int nfs41_setup_sequence(struct nfs4_session *session,
447 struct nfs4_sequence_args *args,
448 struct nfs4_sequence_res *res,
449 int cache_reply,
450 struct rpc_task *task)
451{
fbcd4abc
AA		 452 struct nfs4_slot *slot;
453 struct nfs4_slot_table *tbl;
454 u8 slotid;
455
456 dprintk("--> %s\n", __func__);
ce5039c1
AA		 457 /* slot already allocated? */
458 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
459 return 0;
460
461 memset(res, 0, sizeof(*res));
462 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 463 tbl = &session->fc_slot_table;
464
465 spin_lock(&tbl->slot_tbl_lock);
0b9e2d41 466 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
ea028ac9
AA		 467 /*
468 * The state manager will wait until the slot table is empty.
469 * Schedule the reset thread
470 */
05f0d236 471 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 472 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 473 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 474 return -EAGAIN;
b069d94a
AA		 475 }
476
fbcd4abc
AA		 477 slotid = nfs4_find_slot(tbl, task);
478 if (slotid == NFS4_MAX_SLOT_TABLE) {
479 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
480 spin_unlock(&tbl->slot_tbl_lock);
481 dprintk("<-- %s: no free slots\n", __func__);
482 return -EAGAIN;
483 }
484 spin_unlock(&tbl->slot_tbl_lock);
485
486 slot = tbl->slots + slotid;
99fe60d0 487 args->sa_session = session;
fbcd4abc
AA		 488 args->sa_slotid = slotid;
489 args->sa_cache_this = cache_reply;
490
491 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
492
99fe60d0 493 res->sr_session = session;
fbcd4abc
AA		 494 res->sr_slotid = slotid;
495 res->sr_renewal_time = jiffies;
496 /*
497 * sr_status is only set in decode_sequence, and so will remain
498 * set to 1 if an rpc level failure occurs.
499 */
500 res->sr_status = 1;
ce5039c1
AA		 501 return 0;
502}
503
504int nfs4_setup_sequence(struct nfs_client *clp,
505 struct nfs4_sequence_args *args,
506 struct nfs4_sequence_res *res,
507 int cache_reply,
508 struct rpc_task *task)
509{
510 int ret = 0;
511
512 dprintk("--> %s clp %p session %p sr_slotid %d\n",
513 __func__, clp, clp->cl_session, res->sr_slotid);
514
515 if (!nfs4_has_session(clp))
516 goto out;
517 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
518 task);
2628eddf 519 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 520 /* terminate rpc task */
521 task->tk_status = ret;
522 task->tk_action = NULL;
523 }
524out:
525 dprintk("<-- %s status=%d\n", __func__, ret);
526 return ret;
527}
528
529struct nfs41_call_sync_data {
530 struct nfs_client *clp;
531 struct nfs4_sequence_args *seq_args;
532 struct nfs4_sequence_res *seq_res;
533 int cache_reply;
534};
535
536static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
537{
538 struct nfs41_call_sync_data *data = calldata;
539
540 dprintk("--> %s data->clp->cl_session %p\n", __func__,
541 data->clp->cl_session);
542 if (nfs4_setup_sequence(data->clp, data->seq_args,
543 data->seq_res, data->cache_reply, task))
544 return;
545 rpc_call_start(task);
546}
547
69ab40c4
AA		 548static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
549{
550 struct nfs41_call_sync_data *data = calldata;
551
552 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 553}
554
ce5039c1
AA		 555struct rpc_call_ops nfs41_call_sync_ops = {
556 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 557 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 558};
559
560static int nfs4_call_sync_sequence(struct nfs_client *clp,
561 struct rpc_clnt *clnt,
562 struct rpc_message *msg,
563 struct nfs4_sequence_args *args,
564 struct nfs4_sequence_res *res,
565 int cache_reply)
566{
567 int ret;
568 struct rpc_task *task;
569 struct nfs41_call_sync_data data = {
570 .clp = clp,
571 .seq_args = args,
572 .seq_res = res,
573 .cache_reply = cache_reply,
574 };
575 struct rpc_task_setup task_setup = {
576 .rpc_client = clnt,
577 .rpc_message = msg,
578 .callback_ops = &nfs41_call_sync_ops,
579 .callback_data = &data
580 };
581
582 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
583 task = rpc_run_task(&task_setup);
584 if (IS_ERR(task))
585 ret = PTR_ERR(task);
586 else {
587 ret = task->tk_status;
588 rpc_put_task(task);
589 }
590 return ret;
591}
592
cccef3b9
AA		 593int _nfs4_call_sync_session(struct nfs_server *server,
594 struct rpc_message *msg,
595 struct nfs4_sequence_args *args,
596 struct nfs4_sequence_res *res,
597 int cache_reply)
598{
ce5039c1
AA		 599 return nfs4_call_sync_sequence(server->nfs_client, server->client,
600 msg, args, res, cache_reply);
cccef3b9
AA		 601}
602
603#endif /* CONFIG_NFS_V4_1 */
604
605int _nfs4_call_sync(struct nfs_server *server,
606 struct rpc_message *msg,
607 struct nfs4_sequence_args *args,
608 struct nfs4_sequence_res *res,
609 int cache_reply)
610{
f3752975 611 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 612 return rpc_call_sync(server->client, msg, 0);
613}
614
615#define nfs4_call_sync(server, msg, args, res, cache_reply) \
616 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
617 &(res)->seq_res, (cache_reply))
618
b0df806c
AA		 619static void nfs4_sequence_done(const struct nfs_server *server,
620 struct nfs4_sequence_res *res, int rpc_status)
621{
622#ifdef CONFIG_NFS_V4_1
623 if (nfs4_has_session(server->nfs_client))
624 nfs41_sequence_done(server->nfs_client, res, rpc_status);
625#endif /* CONFIG_NFS_V4_1 */
626}
627
d61e612a 628void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp)
e608e79f
AA		 629{
630#ifdef CONFIG_NFS_V4_1
631 if (nfs4_has_session(clp)) {
e608e79f
AA		 632 rpc_restart_call_prepare(task);
633 return;
634 }
635#endif /* CONFIG_NFS_V4_1 */
636 rpc_restart_call(task);
637}
638
38478b24 639static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 640{
38478b24 641 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 642
38478b24 643 spin_lock(&dir->i_lock);
40d24704
TM		 644 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
645 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 646 nfs_force_lookup_revalidate(dir);
40d24704 647 nfsi->change_attr = cinfo->after;
38478b24 648 spin_unlock(&dir->i_lock);
1da177e4
LT		 649}
650
e56e0b78 651struct nfs4_opendata {
c6d00e63 652 struct kref kref;
e56e0b78
TM		 653 struct nfs_openargs o_arg;
654 struct nfs_openres o_res;
cdd4e68b
TM		 655 struct nfs_open_confirmargs c_arg;
656 struct nfs_open_confirmres c_res;
e56e0b78
TM		 657 struct nfs_fattr f_attr;
658 struct nfs_fattr dir_attr;
ad389da7 659 struct path path;
e56e0b78
TM		 660 struct dentry *dir;
661 struct nfs4_state_owner *owner;
aac00a8d 662 struct nfs4_state *state;
e56e0b78 663 struct iattr attrs;
26e976a8 664 unsigned long timestamp;
3e309914 665 unsigned int rpc_done : 1;
24ac23ab
TM		 666 int rpc_status;
667 int cancelled;
e56e0b78
TM		 668};
669
2ced46c2
TM		 670
671static void nfs4_init_opendata_res(struct nfs4_opendata *p)
672{
673 p->o_res.f_attr = &p->f_attr;
674 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 675 p->o_res.seqid = p->o_arg.seqid;
676 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 677 p->o_res.server = p->o_arg.server;
678 nfs_fattr_init(&p->f_attr);
679 nfs_fattr_init(&p->dir_attr);
578e4585 680 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 681}
682
ad389da7 683static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 684 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 685 const struct iattr *attrs)
686{
ad389da7 687 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 688 struct inode *dir = parent->d_inode;
689 struct nfs_server *server = NFS_SERVER(dir);
690 struct nfs4_opendata *p;
691
692 p = kzalloc(sizeof(*p), GFP_KERNEL);
693 if (p == NULL)
694 goto err;
695 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
696 if (p->o_arg.seqid == NULL)
697 goto err_free;
ad389da7
TM		 698 p->path.mnt = mntget(path->mnt);
699 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 700 p->dir = parent;
701 p->owner = sp;
702 atomic_inc(&sp->so_count);
703 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 704 p->o_arg.open_flags = flags;
705 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 706 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 707 p->o_arg.id = sp->so_owner_id.id;
ad389da7 708 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 709 p->o_arg.server = server;
710 p->o_arg.bitmask = server->attr_bitmask;
711 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 712 if (flags & O_EXCL) {
4882ef72
AB		 713 if (nfs4_has_persistent_session(server->nfs_client)) {
714 /* GUARDED */
715 p->o_arg.u.attrs = &p->attrs;
716 memcpy(&p->attrs, attrs, sizeof(p->attrs));
717 } else { /* EXCLUSIVE4_1 */
718 u32 *s = (u32 *) p->o_arg.u.verifier.data;
719 s[0] = jiffies;
720 s[1] = current->pid;
721 }
e56e0b78
TM		 722 } else if (flags & O_CREAT) {
723 p->o_arg.u.attrs = &p->attrs;
724 memcpy(&p->attrs, attrs, sizeof(p->attrs));
725 }
cdd4e68b
TM		 726 p->c_arg.fh = &p->o_res.fh;
727 p->c_arg.stateid = &p->o_res.stateid;
728 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 729 nfs4_init_opendata_res(p);
c6d00e63 730 kref_init(&p->kref);
e56e0b78
TM		 731 return p;
732err_free:
733 kfree(p);
734err:
735 dput(parent);
736 return NULL;
737}
738
c6d00e63 739static void nfs4_opendata_free(struct kref *kref)
e56e0b78 740{
c6d00e63
TM		 741 struct nfs4_opendata *p = container_of(kref,
742 struct nfs4_opendata, kref);
743
744 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 745 if (p->state != NULL)
746 nfs4_put_open_state(p->state);
c6d00e63
TM		 747 nfs4_put_state_owner(p->owner);
748 dput(p->dir);
31f31db1 749 path_put(&p->path);
c6d00e63
TM		 750 kfree(p);
751}
752
753static void nfs4_opendata_put(struct nfs4_opendata *p)
754{
755 if (p != NULL)
756 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 757}
758
06f814a3
TM		 759static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
760{
06f814a3
TM		 761 int ret;
762
06f814a3 763 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 764 return ret;
765}
766
dc0b027d 767static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 768{
769 int ret = 0;
dc0b027d
TM		 770
771 if (open_mode & O_EXCL)
772 goto out;
773 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 774 case FMODE_READ:
775 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 776 break;
777 case FMODE_WRITE:
778 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 779 break;
780 case FMODE_READ|FMODE_WRITE:
781 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
782 }
dc0b027d 783out:
6ee41268
TM		 784 return ret;
785}
786
dc0b027d 787static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 788{
dc0b027d 789 if ((delegation->type & fmode) != fmode)
aac00a8d 790 return 0;
15c831bf 791 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 792 return 0;
b7391f44 793 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 794 return 1;
795}
796
dc0b027d 797static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 798{
dc0b027d 799 switch (fmode) {
e7616923
TM		 800 case FMODE_WRITE:
801 state->n_wronly++;
802 break;
803 case FMODE_READ:
804 state->n_rdonly++;
805 break;
806 case FMODE_READ|FMODE_WRITE:
807 state->n_rdwr++;
808 }
dc0b027d 809 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 810}
811
dc0b027d 812static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 813{
814 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
815 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
816 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 817 switch (fmode) {
003707c7
TM		 818 case FMODE_READ:
819 set_bit(NFS_O_RDONLY_STATE, &state->flags);
820 break;
821 case FMODE_WRITE:
822 set_bit(NFS_O_WRONLY_STATE, &state->flags);
823 break;
824 case FMODE_READ|FMODE_WRITE:
825 set_bit(NFS_O_RDWR_STATE, &state->flags);
826 }
e7616923
TM		 827}
828
dc0b027d 829static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 830{
8bda4e4c 831 write_seqlock(&state->seqlock);
dc0b027d 832 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 833 write_sequnlock(&state->seqlock);
003707c7
TM		 834}
835
dc0b027d 836static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 837{
8bda4e4c
TM		 838 /*
839 * Protect the call to nfs4_state_set_mode_locked and
840 * serialise the stateid update
841 */
842 write_seqlock(&state->seqlock);
003707c7
TM		 843 if (deleg_stateid != NULL) {
844 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
845 set_bit(NFS_DELEGATED_STATE, &state->flags);
846 }
847 if (open_stateid != NULL)
dc0b027d 848 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 849 write_sequnlock(&state->seqlock);
850 spin_lock(&state->owner->so_lock);
dc0b027d 851 update_open_stateflags(state, fmode);
ec073428 852 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 853}
854
dc0b027d 855static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 856{
857 struct nfs_inode *nfsi = NFS_I(state->inode);
858 struct nfs_delegation *deleg_cur;
859 int ret = 0;
860
dc0b027d 861 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 862
863 rcu_read_lock();
864 deleg_cur = rcu_dereference(nfsi->delegation);
865 if (deleg_cur == NULL)
866 goto no_delegation;
867
868 spin_lock(&deleg_cur->lock);
869 if (nfsi->delegation != deleg_cur ||
dc0b027d 870 (deleg_cur->type & fmode) != fmode)
34310430
TM		 871 goto no_delegation_unlock;
872
873 if (delegation == NULL)
874 delegation = &deleg_cur->stateid;
875 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
876 goto no_delegation_unlock;
877
b7391f44 878 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 879 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 880 ret = 1;
881no_delegation_unlock:
882 spin_unlock(&deleg_cur->lock);
883no_delegation:
884 rcu_read_unlock();
885
886 if (!ret && open_stateid != NULL) {
dc0b027d 887 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 888 ret = 1;
889 }
890
891 return ret;
892}
893
894
dc0b027d 895static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 896{
897 struct nfs_delegation *delegation;
898
899 rcu_read_lock();
900 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 901 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 902 rcu_read_unlock();
903 return;
904 }
905 rcu_read_unlock();
906 nfs_inode_return_delegation(inode);
907}
908
6ee41268 909static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 910{
911 struct nfs4_state *state = opendata->state;
912 struct nfs_inode *nfsi = NFS_I(state->inode);
913 struct nfs_delegation *delegation;
dc0b027d
TM		 914 int open_mode = opendata->o_arg.open_flags & O_EXCL;
915 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 916 nfs4_stateid stateid;
917 int ret = -EAGAIN;
918
aac00a8d 919 for (;;) {
dc0b027d 920 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 921 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 922 if (can_open_cached(state, fmode, open_mode)) {
923 update_open_stateflags(state, fmode);
6ee41268 924 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 925 goto out_return_state;
926 }
927 spin_unlock(&state->owner->so_lock);
928 }
34310430
TM		 929 rcu_read_lock();
930 delegation = rcu_dereference(nfsi->delegation);
931 if (delegation == NULL ||
dc0b027d 932 !can_open_delegated(delegation, fmode)) {
34310430 933 rcu_read_unlock();
aac00a8d 934 break;
34310430 935 }
aac00a8d
TM		 936 /* Save the delegation */
937 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
938 rcu_read_unlock();
af22f94a 939 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 940 if (ret != 0)
941 goto out;
942 ret = -EAGAIN;
34310430
TM		 943
944 /* Try to update the stateid using the delegation */
dc0b027d 945 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 946 goto out_return_state;
aac00a8d 947 }
aac00a8d
TM		 948out:
949 return ERR_PTR(ret);
950out_return_state:
951 atomic_inc(&state->count);
952 return state;
953}
954
24ac23ab
TM		 955static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
956{
957 struct inode *inode;
958 struct nfs4_state *state = NULL;
003707c7 959 struct nfs_delegation *delegation;
1b370bc2 960 int ret;
24ac23ab 961
aac00a8d 962 if (!data->rpc_done) {
6ee41268 963 state = nfs4_try_open_cached(data);
aac00a8d
TM		 964 goto out;
965 }
966
1b370bc2 967 ret = -EAGAIN;
24ac23ab 968 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 969 goto err;
24ac23ab 970 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 971 ret = PTR_ERR(inode);
03f28e3a 972 if (IS_ERR(inode))
1b370bc2
TM		 973 goto err;
974 ret = -ENOMEM;
24ac23ab
TM		 975 state = nfs4_get_open_state(inode, data->owner);
976 if (state == NULL)
1b370bc2 977 goto err_put_inode;
549d6ed5 978 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 979 int delegation_flags = 0;
980
003707c7
TM		 981 rcu_read_lock();
982 delegation = rcu_dereference(NFS_I(inode)->delegation);
983 if (delegation)
984 delegation_flags = delegation->flags;
985 rcu_read_unlock();
15c831bf 986 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 987 nfs_inode_set_delegation(state->inode,
988 data->owner->so_cred,
989 &data->o_res);
990 else
991 nfs_inode_reclaim_delegation(state->inode,
992 data->owner->so_cred,
993 &data->o_res);
994 }
34310430
TM		 995
996 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 997 data->o_arg.fmode);
24ac23ab 998 iput(inode);
aac00a8d 999out:
24ac23ab 1000 return state;
1b370bc2
TM		 1001err_put_inode:
1002 iput(inode);
1003err:
1004 return ERR_PTR(ret);
24ac23ab
TM		 1005}
1006
864472e9
TM		 1007static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1008{
1009 struct nfs_inode *nfsi = NFS_I(state->inode);
1010 struct nfs_open_context *ctx;
1011
1012 spin_lock(&state->inode->i_lock);
1013 list_for_each_entry(ctx, &nfsi->open_files, list) {
1014 if (ctx->state != state)
1015 continue;
1016 get_nfs_open_context(ctx);
1017 spin_unlock(&state->inode->i_lock);
1018 return ctx;
1019 }
1020 spin_unlock(&state->inode->i_lock);
1021 return ERR_PTR(-ENOENT);
1022}
1023
6f220ed5
TM		 1024static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1025{
1026 struct nfs4_opendata *opendata;
1027
dc0b027d 1028 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1029 if (opendata == NULL)
1030 return ERR_PTR(-ENOMEM);
1031 opendata->state = state;
1032 atomic_inc(&state->count);
1033 return opendata;
1034}
1035
dc0b027d 1036static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1037{
2ced46c2 1038 struct nfs4_state *newstate;
864472e9
TM		 1039 int ret;
1040
dc0b027d
TM		 1041 opendata->o_arg.open_flags = 0;
1042 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1043 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1044 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1045 nfs4_init_opendata_res(opendata);
864472e9
TM		 1046 ret = _nfs4_proc_open(opendata);
1047 if (ret != 0)
1048 return ret;
2ced46c2 1049 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1050 if (IS_ERR(newstate))
1051 return PTR_ERR(newstate);
dc0b027d 1052 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1053 *res = newstate;
864472e9
TM		 1054 return 0;
1055}
1056
1057static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1058{
864472e9 1059 struct nfs4_state *newstate;
864472e9
TM		 1060 int ret;
1061
1062 /* memory barrier prior to reading state->n_* */
2ced46c2 1063 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1064 smp_rmb();
1065 if (state->n_rdwr != 0) {
2ced46c2 1066 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1067 if (ret != 0)
1068 return ret;
2ced46c2
TM		 1069 if (newstate != state)
1070 return -ESTALE;
864472e9
TM		 1071 }
1072 if (state->n_wronly != 0) {
2ced46c2 1073 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1074 if (ret != 0)
1075 return ret;
2ced46c2
TM		 1076 if (newstate != state)
1077 return -ESTALE;
864472e9
TM		 1078 }
1079 if (state->n_rdonly != 0) {
2ced46c2 1080 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1081 if (ret != 0)
1082 return ret;
2ced46c2
TM		 1083 if (newstate != state)
1084 return -ESTALE;
864472e9 1085 }
1ac7e2fd
TM		 1086 /*
1087 * We may have performed cached opens for all three recoveries.
1088 * Check if we need to update the current stateid.
1089 */
1090 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1091 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1092 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1093 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1094 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1095 write_sequnlock(&state->seqlock);
1ac7e2fd 1096 }
864472e9
TM		 1097 return 0;
1098}
1099
1da177e4
LT		 1100/*
1101 * OPEN_RECLAIM:
1102 * reclaim state on the server after a reboot.
1da177e4 1103 */
539cd03a 1104static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1105{
1ac7e2fd 1106 struct nfs_delegation *delegation;
864472e9 1107 struct nfs4_opendata *opendata;
dc0b027d 1108 fmode_t delegation_type = 0;
1da177e4
LT		 1109 int status;
1110
6f220ed5
TM		 1111 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1112 if (IS_ERR(opendata))
1113 return PTR_ERR(opendata);
864472e9
TM		 1114 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1115 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1116 rcu_read_lock();
1117 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1118 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1119 delegation_type = delegation->type;
1ac7e2fd 1120 rcu_read_unlock();
864472e9
TM		 1121 opendata->o_arg.u.delegation_type = delegation_type;
1122 status = nfs4_open_recover(opendata, state);
c6d00e63 1123 nfs4_opendata_put(opendata);
1da177e4
LT		 1124 return status;
1125}
1126
539cd03a 1127static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1128{
1129 struct nfs_server *server = NFS_SERVER(state->inode);
1130 struct nfs4_exception exception = { };
1131 int err;
1132 do {
539cd03a 1133 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1134 if (err != -NFS4ERR_DELAY)
1135 break;
1136 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1137 } while (exception.retry);
1138 return err;
1139}
1140
864472e9
TM		 1141static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1142{
1143 struct nfs_open_context *ctx;
1144 int ret;
1145
1146 ctx = nfs4_state_find_open_context(state);
1147 if (IS_ERR(ctx))
1148 return PTR_ERR(ctx);
539cd03a 1149 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1150 put_nfs_open_context(ctx);
1151 return ret;
1152}
1153
13437e12 1154static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1155{
e56e0b78 1156 struct nfs4_opendata *opendata;
864472e9 1157 int ret;
1da177e4 1158
6f220ed5
TM		 1159 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1160 if (IS_ERR(opendata))
1161 return PTR_ERR(opendata);
e56e0b78 1162 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1163 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1164 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1165 ret = nfs4_open_recover(opendata, state);
c6d00e63 1166 nfs4_opendata_put(opendata);
864472e9 1167 return ret;
1da177e4
LT		 1168}
1169
13437e12 1170int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1171{
1172 struct nfs4_exception exception = { };
539cd03a 1173 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1174 int err;
1175 do {
13437e12 1176 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1177 switch (err) {
1178 case 0:
965b5d67
TM		 1179 case -ENOENT:
1180 case -ESTALE:
1181 goto out;
1da177e4
LT		 1182 case -NFS4ERR_STALE_CLIENTID:
1183 case -NFS4ERR_STALE_STATEID:
1184 case -NFS4ERR_EXPIRED:
1185 /* Don't recall a delegation if it was lost */
7539bbab 1186 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1187 goto out;
1188 case -ERESTARTSYS:
1189 /*
1190 * The show must go on: exit, but mark the
1191 * stateid as needing recovery.
1192 */
1193 case -NFS4ERR_ADMIN_REVOKED:
1194 case -NFS4ERR_BAD_STATEID:
1195 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1196 case -ENOMEM:
1197 err = 0;
1198 goto out;
1da177e4
LT		 1199 }
1200 err = nfs4_handle_exception(server, err, &exception);
1201 } while (exception.retry);
965b5d67 1202out:
1da177e4
LT		 1203 return err;
1204}
1205
cdd4e68b
TM		 1206static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1207{
1208 struct nfs4_opendata *data = calldata;
1209
1210 data->rpc_status = task->tk_status;
1211 if (RPC_ASSASSINATED(task))
1212 return;
26e976a8 1213 if (data->rpc_status == 0) {
cdd4e68b
TM		 1214 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1215 sizeof(data->o_res.stateid.data));
bb22629e 1216 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1217 renew_lease(data->o_res.server, data->timestamp);
3e309914 1218 data->rpc_done = 1;
26e976a8 1219 }
cdd4e68b
TM		 1220}
1221
1222static void nfs4_open_confirm_release(void *calldata)
1223{
1224 struct nfs4_opendata *data = calldata;
1225 struct nfs4_state *state = NULL;
1226
1227 /* If this request hasn't been cancelled, do nothing */
1228 if (data->cancelled == 0)
1229 goto out_free;
1230 /* In case of error, no cleanup! */
3e309914 1231 if (!data->rpc_done)
cdd4e68b 1232 goto out_free;
cdd4e68b 1233 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1234 if (!IS_ERR(state))
dc0b027d 1235 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1236out_free:
c6d00e63 1237 nfs4_opendata_put(data);
cdd4e68b
TM		 1238}
1239
1240static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1241 .rpc_call_done = nfs4_open_confirm_done,
1242 .rpc_release = nfs4_open_confirm_release,
1243};
1244
1245/*
1246 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1247 */
1248static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1249{
1250 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1251 struct rpc_task *task;
5138fde0
TM		 1252 struct rpc_message msg = {
1253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1254 .rpc_argp = &data->c_arg,
1255 .rpc_resp = &data->c_res,
1256 .rpc_cred = data->owner->so_cred,
1257 };
c970aa85
TM		 1258 struct rpc_task_setup task_setup_data = {
1259 .rpc_client = server->client,
5138fde0 1260 .rpc_message = &msg,
c970aa85
TM		 1261 .callback_ops = &nfs4_open_confirm_ops,
1262 .callback_data = data,
101070ca 1263 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1264 .flags = RPC_TASK_ASYNC,
1265 };
1da177e4
LT		 1266 int status;
1267
c6d00e63 1268 kref_get(&data->kref);
3e309914
TM		 1269 data->rpc_done = 0;
1270 data->rpc_status = 0;
5138fde0 1271 data->timestamp = jiffies;
c970aa85 1272 task = rpc_run_task(&task_setup_data);
7a1218a2 1273 if (IS_ERR(task))
cdd4e68b 1274 return PTR_ERR(task);
cdd4e68b
TM		 1275 status = nfs4_wait_for_completion_rpc_task(task);
1276 if (status != 0) {
1277 data->cancelled = 1;
1278 smp_wmb();
1279 } else
1280 status = data->rpc_status;
e6b3c4db 1281 rpc_put_task(task);
1da177e4
LT		 1282 return status;
1283}
1284
24ac23ab 1285static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1286{
24ac23ab
TM		 1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state_owner *sp = data->owner;
5138fde0 1289
24ac23ab
TM		 1290 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1291 return;
aac00a8d
TM		 1292 /*
1293 * Check if we still need to send an OPEN call, or if we can use
1294 * a delegation instead.
1295 */
1296 if (data->state != NULL) {
1297 struct nfs_delegation *delegation;
1298
dc0b027d 1299 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1300 goto out_no_action;
aac00a8d
TM		 1301 rcu_read_lock();
1302 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1303 if (delegation != NULL &&
15c831bf 1304 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1305 rcu_read_unlock();
6ee41268 1306 goto out_no_action;
aac00a8d
TM		 1307 }
1308 rcu_read_unlock();
1309 }
24ac23ab 1310 /* Update sequence id. */
9f958ab8 1311 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1312 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1313 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1314 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1315 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1316 }
26e976a8 1317 data->timestamp = jiffies;
d898528c
AA		 1318 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1319 &data->o_arg.seq_args,
1320 &data->o_res.seq_res, 1, task))
1321 return;
5138fde0 1322 rpc_call_start(task);
6ee41268
TM		 1323 return;
1324out_no_action:
1325 task->tk_action = NULL;
1326
24ac23ab 1327}
1da177e4 1328
24ac23ab
TM		 1329static void nfs4_open_done(struct rpc_task *task, void *calldata)
1330{
1331 struct nfs4_opendata *data = calldata;
1da177e4 1332
24ac23ab 1333 data->rpc_status = task->tk_status;
d898528c 1334
d61e612a
TM		 1335 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1336 task->tk_status);
d898528c 1337
24ac23ab
TM		 1338 if (RPC_ASSASSINATED(task))
1339 return;
1340 if (task->tk_status == 0) {
1341 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1342 case S_IFREG:
1343 break;
1344 case S_IFLNK:
24ac23ab 1345 data->rpc_status = -ELOOP;
6f926b5b
TM		 1346 break;
1347 case S_IFDIR:
24ac23ab 1348 data->rpc_status = -EISDIR;
6f926b5b
TM		 1349 break;
1350 default:
24ac23ab 1351 data->rpc_status = -ENOTDIR;
6f926b5b 1352 }
26e976a8 1353 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1354 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1355 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1356 }
3e309914 1357 data->rpc_done = 1;
24ac23ab 1358}
6f926b5b 1359
24ac23ab
TM		 1360static void nfs4_open_release(void *calldata)
1361{
1362 struct nfs4_opendata *data = calldata;
1363 struct nfs4_state *state = NULL;
1364
1365 /* If this request hasn't been cancelled, do nothing */
1366 if (data->cancelled == 0)
1367 goto out_free;
1368 /* In case of error, no cleanup! */
3e309914 1369 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1370 goto out_free;
1371 /* In case we need an open_confirm, no cleanup! */
1372 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1373 goto out_free;
24ac23ab 1374 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1375 if (!IS_ERR(state))
dc0b027d 1376 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1377out_free:
c6d00e63 1378 nfs4_opendata_put(data);
24ac23ab
TM		 1379}
1380
1381static const struct rpc_call_ops nfs4_open_ops = {
1382 .rpc_call_prepare = nfs4_open_prepare,
1383 .rpc_call_done = nfs4_open_done,
1384 .rpc_release = nfs4_open_release,
1385};
1386
1387/*
1388 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1389 */
1390static int _nfs4_proc_open(struct nfs4_opendata *data)
1391{
1392 struct inode *dir = data->dir->d_inode;
1393 struct nfs_server *server = NFS_SERVER(dir);
1394 struct nfs_openargs *o_arg = &data->o_arg;
1395 struct nfs_openres *o_res = &data->o_res;
1396 struct rpc_task *task;
5138fde0
TM		 1397 struct rpc_message msg = {
1398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1399 .rpc_argp = o_arg,
1400 .rpc_resp = o_res,
1401 .rpc_cred = data->owner->so_cred,
1402 };
c970aa85
TM		 1403 struct rpc_task_setup task_setup_data = {
1404 .rpc_client = server->client,
5138fde0 1405 .rpc_message = &msg,
c970aa85
TM		 1406 .callback_ops = &nfs4_open_ops,
1407 .callback_data = data,
101070ca 1408 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1409 .flags = RPC_TASK_ASYNC,
1410 };
24ac23ab
TM		 1411 int status;
1412
c6d00e63 1413 kref_get(&data->kref);
3e309914
TM		 1414 data->rpc_done = 0;
1415 data->rpc_status = 0;
2ced46c2 1416 data->cancelled = 0;
c970aa85 1417 task = rpc_run_task(&task_setup_data);
7a1218a2 1418 if (IS_ERR(task))
24ac23ab 1419 return PTR_ERR(task);
24ac23ab
TM		 1420 status = nfs4_wait_for_completion_rpc_task(task);
1421 if (status != 0) {
1422 data->cancelled = 1;
1423 smp_wmb();
1424 } else
1425 status = data->rpc_status;
e6b3c4db 1426 rpc_put_task(task);
3e309914 1427 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1428 return status;
1429
9936781d
TM		 1430 if (o_res->fh.size == 0)
1431 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1432
56ae19f3
TM		 1433 if (o_arg->open_flags & O_CREAT) {
1434 update_changeattr(dir, &o_res->cinfo);
1435 nfs_post_op_update_inode(dir, o_res->dir_attr);
1436 } else
1437 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1438 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1439 status = _nfs4_proc_open_confirm(data);
1da177e4 1440 if (status != 0)
24ac23ab 1441 return status;
1da177e4
LT		 1442 }
1443 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1444 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1445 return 0;
1da177e4
LT		 1446}
1447
10afec90 1448static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1449{
7539bbab 1450 struct nfs_client *clp = server->nfs_client;
a78cb57a 1451 unsigned int loop;
6b30954e 1452 int ret;
58d9714a 1453
a78cb57a 1454 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1455 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1456 if (ret != 0)
a78cb57a 1457 break;
e598d843
TM		 1458 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1459 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1460 break;
58d9714a 1461 nfs4_schedule_state_recovery(clp);
a78cb57a 1462 ret = -EIO;
6b30954e 1463 }
a78cb57a 1464 return ret;
58d9714a
TM		 1465}
1466
1da177e4
LT		 1467/*
1468 * OPEN_EXPIRED:
1469 * reclaim state on the server after a network partition.
1470 * Assumes caller holds the appropriate lock
1471 */
539cd03a 1472static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1473{
e56e0b78 1474 struct nfs4_opendata *opendata;
864472e9 1475 int ret;
1da177e4 1476
6f220ed5
TM		 1477 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1478 if (IS_ERR(opendata))
1479 return PTR_ERR(opendata);
864472e9 1480 ret = nfs4_open_recover(opendata, state);
35d05778 1481 if (ret == -ESTALE)
539cd03a 1482 d_drop(ctx->path.dentry);
c6d00e63 1483 nfs4_opendata_put(opendata);
864472e9 1484 return ret;
1da177e4
LT		 1485}
1486
a9ed2e25 1487static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1488{
539cd03a 1489 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1490 struct nfs4_exception exception = { };
1491 int err;
1492
1493 do {
539cd03a 1494 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1495 switch (err) {
1496 default:
1497 goto out;
1498 case -NFS4ERR_GRACE:
1499 case -NFS4ERR_DELAY:
1500 nfs4_handle_exception(server, err, &exception);
1501 err = 0;
1502 }
202b50dc 1503 } while (exception.retry);
a9ed2e25 1504out:
202b50dc
TM		 1505 return err;
1506}
1507
1da177e4
LT		 1508static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1509{
1da177e4 1510 struct nfs_open_context *ctx;
864472e9 1511 int ret;
1da177e4 1512
864472e9
TM		 1513 ctx = nfs4_state_find_open_context(state);
1514 if (IS_ERR(ctx))
1515 return PTR_ERR(ctx);
539cd03a 1516 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1517 put_nfs_open_context(ctx);
1518 return ret;
1da177e4
LT		 1519}
1520
aa53ed54
JL		 1521/*
1522 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1523 * fields corresponding to attributes that were used to store the verifier.
1524 * Make sure we clobber those fields in the later setattr call
1525 */
1526static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1527{
1528 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1529 !(sattr->ia_valid & ATTR_ATIME_SET))
1530 sattr->ia_valid |= ATTR_ATIME;
1531
1532 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1533 !(sattr->ia_valid & ATTR_MTIME_SET))
1534 sattr->ia_valid |= ATTR_MTIME;
1535}
1536
1da177e4 1537/*
24ac23ab 1538 * Returns a referenced nfs4_state
1da177e4 1539 */
dc0b027d 1540static 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		 1541{
1542 struct nfs4_state_owner *sp;
1543 struct nfs4_state *state = NULL;
1544 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1545 struct nfs4_opendata *opendata;
aac00a8d 1546 int status;
1da177e4
LT		 1547
1548 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1549 status = -ENOMEM;
1550 if (!(sp = nfs4_get_state_owner(server, cred))) {
1551 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1552 goto out_err;
1553 }
58d9714a
TM		 1554 status = nfs4_recover_expired_lease(server);
1555 if (status != 0)
b4454fe1 1556 goto err_put_state_owner;
aac00a8d 1557 if (path->dentry->d_inode != NULL)
dc0b027d 1558 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1559 status = -ENOMEM;
dc0b027d 1560 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1561 if (opendata == NULL)
95d35cb4 1562 goto err_put_state_owner;
1da177e4 1563
aac00a8d
TM		 1564 if (path->dentry->d_inode != NULL)
1565 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1566
24ac23ab 1567 status = _nfs4_proc_open(opendata);
1da177e4 1568 if (status != 0)
c6d00e63 1569 goto err_opendata_put;
1da177e4 1570
aa53ed54
JL		 1571 if (opendata->o_arg.open_flags & O_EXCL)
1572 nfs4_exclusive_attrset(opendata, sattr);
1573
24ac23ab 1574 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1575 status = PTR_ERR(state);
1576 if (IS_ERR(state))
c6d00e63 1577 goto err_opendata_put;
c6d00e63 1578 nfs4_opendata_put(opendata);
1da177e4 1579 nfs4_put_state_owner(sp);
1da177e4
LT		 1580 *res = state;
1581 return 0;
c6d00e63
TM		 1582err_opendata_put:
1583 nfs4_opendata_put(opendata);
e56e0b78
TM		 1584err_put_state_owner:
1585 nfs4_put_state_owner(sp);
1da177e4 1586out_err:
1da177e4
LT		 1587 *res = NULL;
1588 return status;
1589}
1590
1591
dc0b027d 1592static 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		 1593{
1594 struct nfs4_exception exception = { };
1595 struct nfs4_state *res;
1596 int status;
1597
1598 do {
dc0b027d 1599 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1600 if (status == 0)
1601 break;
1602 /* NOTE: BAD_SEQID means the server and client disagree about the
1603 * book-keeping w.r.t. state-changing operations
1604 * (OPEN/CLOSE/LOCK/LOCKU...)
1605 * It is actually a sign of a bug on the client or on the server.
1606 *
1607 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1608 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1609 * have unhashed the old state_owner for us, and that we can
1610 * therefore safely retry using a new one. We should still warn
1611 * the user though...
1612 */
1613 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1614 printk(KERN_WARNING "NFS: v4 server %s "
1615 " returned a bad sequence-id error!\n",
1616 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1617 exception.retry = 1;
1618 continue;
1619 }
550f5747
TM		 1620 /*
1621 * BAD_STATEID on OPEN means that the server cancelled our
1622 * state before it received the OPEN_CONFIRM.
1623 * Recover by retrying the request as per the discussion
1624 * on Page 181 of RFC3530.
1625 */
1626 if (status == -NFS4ERR_BAD_STATEID) {
1627 exception.retry = 1;
1628 continue;
1629 }
aac00a8d
TM		 1630 if (status == -EAGAIN) {
1631 /* We must have found a delegation */
1632 exception.retry = 1;
1633 continue;
1634 }
1da177e4
LT		 1635 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1636 status, &exception));
1637 } while (exception.retry);
1638 return res;
1639}
1640
659bfcd6
TM		 1641static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1642 struct nfs_fattr *fattr, struct iattr *sattr,
1643 struct nfs4_state *state)
1da177e4 1644{
3e4f6290 1645 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1646 struct nfs_setattrargs arg = {
3e4f6290 1647 .fh = NFS_FH(inode),
1da177e4
LT		 1648 .iap = sattr,
1649 .server = server,
1650 .bitmask = server->attr_bitmask,
1651 };
1652 struct nfs_setattrres res = {
1653 .fattr = fattr,
1654 .server = server,
1655 };
1656 struct rpc_message msg = {
659bfcd6
TM		 1657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1658 .rpc_argp = &arg,
1659 .rpc_resp = &res,
1660 .rpc_cred = cred,
1da177e4 1661 };
26e976a8 1662 unsigned long timestamp = jiffies;
65e4308d 1663 int status;
1da177e4 1664
0e574af1 1665 nfs_fattr_init(fattr);
1da177e4 1666
3e4f6290
TM		 1667 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1668 /* Use that stateid */
1669 } else if (state != NULL) {
08e9eac4
TM		 1670 nfs4_copy_stateid(&arg.stateid, state, current->files);
1671 } else
1da177e4
LT		 1672 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1673
cccef3b9 1674 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1675 if (status == 0 && state != NULL)
1676 renew_lease(server, timestamp);
65e4308d 1677 return status;
1da177e4
LT		 1678}
1679
659bfcd6
TM		 1680static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1681 struct nfs_fattr *fattr, struct iattr *sattr,
1682 struct nfs4_state *state)
1da177e4 1683{
3e4f6290 1684 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1685 struct nfs4_exception exception = { };
1686 int err;
1687 do {
1688 err = nfs4_handle_exception(server,
659bfcd6 1689 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1690 &exception);
1691 } while (exception.retry);
1692 return err;
1693}
1694
1695struct nfs4_closedata {
4a35bd41 1696 struct path path;
1da177e4
LT		 1697 struct inode *inode;
1698 struct nfs4_state *state;
1699 struct nfs_closeargs arg;
1700 struct nfs_closeres res;
516a6af6 1701 struct nfs_fattr fattr;
26e976a8 1702 unsigned long timestamp;
1da177e4
LT		 1703};
1704
963d8fe5 1705static void nfs4_free_closedata(void *data)
9512135d 1706{
963d8fe5
TM		 1707 struct nfs4_closedata *calldata = data;
1708 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1709
1710 nfs4_put_open_state(calldata->state);
1711 nfs_free_seqid(calldata->arg.seqid);
9512135d 1712 nfs4_put_state_owner(sp);
31f31db1 1713 path_put(&calldata->path);
9512135d
TM		 1714 kfree(calldata);
1715}
1716
963d8fe5 1717static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1718{
963d8fe5 1719 struct nfs4_closedata *calldata = data;
1da177e4 1720 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1721 struct nfs_server *server = NFS_SERVER(calldata->inode);
1722
19ddab06 1723 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1724 if (RPC_ASSASSINATED(task))
1725 return;
1da177e4
LT		 1726 /* hmm. we are done with the inode, and in the process of freeing
1727 * the state_owner. we keep this around to process errors
1728 */
1da177e4
LT		 1729 switch (task->tk_status) {
1730 case 0:
45328c35 1731 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1732 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1733 break;
1734 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1735 case -NFS4ERR_OLD_STATEID:
1736 case -NFS4ERR_BAD_STATEID:
1da177e4 1737 case -NFS4ERR_EXPIRED:
dc0b027d 1738 if (calldata->arg.fmode == 0)
9e33bed5 1739 break;
1da177e4 1740 default:
9e33bed5 1741 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
d61e612a 1742 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1743 return;
1744 }
1745 }
516a6af6 1746 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1747}
1748
4ce70ada 1749static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1750{
4ce70ada 1751 struct nfs4_closedata *calldata = data;
9512135d 1752 struct nfs4_state *state = calldata->state;
003707c7 1753 int clear_rd, clear_wr, clear_rdwr;
9512135d 1754
963d8fe5 1755 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1756 return;
003707c7 1757
003707c7 1758 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1759 spin_lock(&state->owner->so_lock);
003707c7 1760 /* Calculate the change in open mode */
e7616923 1761 if (state->n_rdwr == 0) {
003707c7 1762 if (state->n_rdonly == 0) {
003707c7
TM		 1763 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1764 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1765 }
1766 if (state->n_wronly == 0) {
003707c7
TM		 1767 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1768 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1769 }
e7616923 1770 }
4cecb76f 1771 spin_unlock(&state->owner->so_lock);
003707c7 1772 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1773 /* Note: exit _without_ calling nfs4_close_done */
1774 task->tk_action = NULL;
9512135d
TM		 1775 return;
1776 }
516a6af6 1777 nfs_fattr_init(calldata->res.fattr);
45328c35 1778 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1779 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1780 calldata->arg.fmode = FMODE_READ;
45328c35 1781 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1782 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1783 calldata->arg.fmode = FMODE_WRITE;
45328c35 1784 }
26e976a8 1785 calldata->timestamp = jiffies;
19ddab06
AA		 1786 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1787 &calldata->arg.seq_args, &calldata->res.seq_res,
1788 1, task))
1789 return;
5138fde0 1790 rpc_call_start(task);
1da177e4
LT		 1791}
1792
963d8fe5 1793static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1794 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1795 .rpc_call_done = nfs4_close_done,
1796 .rpc_release = nfs4_free_closedata,
1797};
1798
1da177e4
LT		 1799/*
1800 * It is possible for data to be read/written from a mem-mapped file
1801 * after the sys_close call (which hits the vfs layer as a flush).
1802 * This means that we can't safely call nfsv4 close on a file until
1803 * the inode is cleared. This in turn means that we are not good
1804 * NFSv4 citizens - we do not indicate to the server to update the file's
1805 * share state even when we are done with one of the three share
1806 * stateid's in the inode.
1807 *
1808 * NOTE: Caller must be holding the sp->so_owner semaphore!
1809 */
a49c3c77 1810int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1811{
4a35bd41 1812 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1813 struct nfs4_closedata *calldata;
b39e625b
TM		 1814 struct nfs4_state_owner *sp = state->owner;
1815 struct rpc_task *task;
5138fde0
TM		 1816 struct rpc_message msg = {
1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1818 .rpc_cred = state->owner->so_cred,
1819 };
c970aa85
TM		 1820 struct rpc_task_setup task_setup_data = {
1821 .rpc_client = server->client,
5138fde0 1822 .rpc_message = &msg,
c970aa85 1823 .callback_ops = &nfs4_close_ops,
101070ca 1824 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1825 .flags = RPC_TASK_ASYNC,
1826 };
9512135d 1827 int status = -ENOMEM;
1da177e4 1828
19ddab06 1829 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1830 if (calldata == NULL)
9512135d 1831 goto out;
4a35bd41 1832 calldata->inode = state->inode;
1da177e4 1833 calldata->state = state;
4a35bd41 1834 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1835 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1836 if (nfs4_has_session(server->nfs_client))
1837 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1838 /* Serialization for the sequence id */
cee54fc9 1839 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1840 if (calldata->arg.seqid == NULL)
1841 goto out_free_calldata;
dc0b027d 1842 calldata->arg.fmode = 0;
a65318bf 1843 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1844 calldata->res.fattr = &calldata->fattr;
c1d51931 1845 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1846 calldata->res.server = server;
5f7dbd5c 1847 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1848 calldata->path.mnt = mntget(path->mnt);
1849 calldata->path.dentry = dget(path->dentry);
9512135d 1850
5138fde0
TM		 1851 msg.rpc_argp = &calldata->arg,
1852 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1853 task_setup_data.callback_data = calldata;
1854 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1855 if (IS_ERR(task))
1856 return PTR_ERR(task);
a49c3c77
TM		 1857 status = 0;
1858 if (wait)
1859 status = rpc_wait_for_completion_task(task);
b39e625b 1860 rpc_put_task(task);
a49c3c77 1861 return status;
9512135d
TM		 1862out_free_calldata:
1863 kfree(calldata);
1864out:
b39e625b
TM		 1865 nfs4_put_open_state(state);
1866 nfs4_put_state_owner(sp);
9512135d 1867 return status;
1da177e4
LT		 1868}
1869
dc0b027d 1870static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1871{
1872 struct file *filp;
1b45c46c 1873 int ret;
02a913a7 1874
1b45c46c 1875 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1876 if (fmode & FMODE_EXEC) {
af22f94a 1877 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1878 state->owner->so_cred,
1879 nd->intent.open.flags);
1880 if (ret < 0)
1881 goto out_close;
1882 }
4a35bd41 1883 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1884 if (!IS_ERR(filp)) {
1885 struct nfs_open_context *ctx;
cd3758e3 1886 ctx = nfs_file_open_context(filp);
02a913a7 1887 ctx->state = state;
95cf959b
TM		 1888 return 0;
1889 }
1b45c46c
TM		 1890 ret = PTR_ERR(filp);
1891out_close:
dc0b027d 1892 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1893 return ret;
02a913a7
TM		 1894}
1895
1896struct dentry *
1da177e4
LT		 1897nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1898{
ad389da7 1899 struct path path = {
4ac91378 1900 .mnt = nd->path.mnt,
ad389da7
TM		 1901 .dentry = dentry,
1902 };
4ac91378 1903 struct dentry *parent;
1da177e4
LT		 1904 struct iattr attr;
1905 struct rpc_cred *cred;
1906 struct nfs4_state *state;
02a913a7 1907 struct dentry *res;
dc0b027d 1908 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1909
1910 if (nd->flags & LOOKUP_CREATE) {
1911 attr.ia_mode = nd->intent.open.create_mode;
1912 attr.ia_valid = ATTR_MODE;
1913 if (!IS_POSIXACL(dir))
ce3b0f8d 1914 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1915 } else {
1916 attr.ia_valid = 0;
1917 BUG_ON(nd->intent.open.flags & O_CREAT);
1918 }
1919
98a8e323 1920 cred = rpc_lookup_cred();
1da177e4 1921 if (IS_ERR(cred))
02a913a7 1922 return (struct dentry *)cred;
565277f6
TM		 1923 parent = dentry->d_parent;
1924 /* Protect against concurrent sillydeletes */
1925 nfs_block_sillyrename(parent);
dc0b027d 1926 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1927 put_rpccred(cred);
02a913a7 1928 if (IS_ERR(state)) {
d75340cc 1929 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1930 d_add(dentry, NULL);
d75340cc
TM		 1931 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1932 }
565277f6 1933 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1934 return (struct dentry *)state;
1935 }
24ac23ab 1936 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1937 if (res != NULL)
deee9369 1938 path.dentry = res;
d75340cc 1939 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1940 nfs_unblock_sillyrename(parent);
dc0b027d 1941 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1942 return res;
1da177e4
LT		 1943}
1944
1945int
02a913a7 1946nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1947{
ad389da7 1948 struct path path = {
4ac91378 1949 .mnt = nd->path.mnt,
ad389da7
TM		 1950 .dentry = dentry,
1951 };
1da177e4
LT		 1952 struct rpc_cred *cred;
1953 struct nfs4_state *state;
dc0b027d 1954 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1955
98a8e323 1956 cred = rpc_lookup_cred();
1da177e4
LT		 1957 if (IS_ERR(cred))
1958 return PTR_ERR(cred);
dc0b027d 1959 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1960 put_rpccred(cred);
02a913a7
TM		 1961 if (IS_ERR(state)) {
1962 switch (PTR_ERR(state)) {
1963 case -EPERM:
1964 case -EACCES:
1965 case -EDQUOT:
1966 case -ENOSPC:
1967 case -EROFS:
1968 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1969 return 1;
b87c0adf
CL		 1970 default:
1971 goto out_drop;
02a913a7 1972 }
02a913a7 1973 }
24ac23ab 1974 if (state->inode == dentry->d_inode) {
d75340cc 1975 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1976 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1977 return 1;
1978 }
dc0b027d 1979 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1980out_drop:
1981 d_drop(dentry);
1da177e4
LT		 1982 return 0;
1983}
1984
1185a552 1985static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 1986{
1987 if (ctx->state == NULL)
1988 return;
1989 if (is_sync)
1990 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1991 else
1992 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1993}
1da177e4
LT		 1994
1995static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1996{
43652ad5
BH		 1997 struct nfs4_server_caps_arg args = {
1998 .fhandle = fhandle,
1999 };
1da177e4
LT		 2000 struct nfs4_server_caps_res res = {};
2001 struct rpc_message msg = {
2002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2003 .rpc_argp = &args,
1da177e4
LT		 2004 .rpc_resp = &res,
2005 };
2006 int status;
2007
cccef3b9 2008 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2009 if (status == 0) {
2010 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2011 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2012 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2013 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2014 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2015 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2016 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2017 server->caps |= NFS_CAP_ACLS;
2018 if (res.has_links != 0)
2019 server->caps |= NFS_CAP_HARDLINKS;
2020 if (res.has_symlinks != 0)
2021 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2022 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2023 server->caps |= NFS_CAP_FILEID;
2024 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2025 server->caps |= NFS_CAP_MODE;
2026 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2027 server->caps |= NFS_CAP_NLINK;
2028 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2029 server->caps |= NFS_CAP_OWNER;
2030 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2031 server->caps |= NFS_CAP_OWNER_GROUP;
2032 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2033 server->caps |= NFS_CAP_ATIME;
2034 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2035 server->caps |= NFS_CAP_CTIME;
2036 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2037 server->caps |= NFS_CAP_MTIME;
2038
a65318bf
TM		 2039 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2040 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2041 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2042 server->acl_bitmask = res.acl_bitmask;
2043 }
cccef3b9 2044
1da177e4
LT		 2045 return status;
2046}
2047
55a97593 2048int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2049{
2050 struct nfs4_exception exception = { };
2051 int err;
2052 do {
2053 err = nfs4_handle_exception(server,
2054 _nfs4_server_capabilities(server, fhandle),
2055 &exception);
2056 } while (exception.retry);
2057 return err;
2058}
2059
2060static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2061 struct nfs_fsinfo *info)
2062{
1da177e4
LT		 2063 struct nfs4_lookup_root_arg args = {
2064 .bitmask = nfs4_fattr_bitmap,
2065 };
2066 struct nfs4_lookup_res res = {
2067 .server = server,
0e574af1 2068 .fattr = info->fattr,
1da177e4
LT		 2069 .fh = fhandle,
2070 };
2071 struct rpc_message msg = {
2072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2073 .rpc_argp = &args,
2074 .rpc_resp = &res,
2075 };
008f55d0 2076
0e574af1 2077 nfs_fattr_init(info->fattr);
fccba804 2078 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2079}
2080
2081static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2082 struct nfs_fsinfo *info)
2083{
2084 struct nfs4_exception exception = { };
2085 int err;
2086 do {
2087 err = nfs4_handle_exception(server,
2088 _nfs4_lookup_root(server, fhandle, info),
2089 &exception);
2090 } while (exception.retry);
2091 return err;
2092}
2093
54ceac45
DH		 2094/*
2095 * get the file handle for the "/" directory on the server
2096 */
1da177e4 2097static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2098 struct nfs_fsinfo *info)
1da177e4 2099{
1da177e4
LT		 2100 int status;
2101
1da177e4 2102 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2103 if (status == 0)
2104 status = nfs4_server_capabilities(server, fhandle);
2105 if (status == 0)
2106 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2107 return nfs4_map_errors(status);
1da177e4
LT		 2108}
2109
6b97fd3d
MN		 2110/*
2111 * Get locations and (maybe) other attributes of a referral.
2112 * Note that we'll actually follow the referral later when
2113 * we detect fsid mismatch in inode revalidation
2114 */
56659e99 2115static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2116{
2117 int status = -ENOMEM;
2118 struct page *page = NULL;
2119 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2120
2121 page = alloc_page(GFP_KERNEL);
2122 if (page == NULL)
2123 goto out;
2124 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2125 if (locations == NULL)
2126 goto out;
2127
c228fd3a 2128 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2129 if (status != 0)
2130 goto out;
2131 /* Make sure server returned a different fsid for the referral */
2132 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2133 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2134 status = -EIO;
2135 goto out;
2136 }
2137
2138 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2139 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2140 if (!fattr->mode)
2141 fattr->mode = S_IFDIR;
2142 memset(fhandle, 0, sizeof(struct nfs_fh));
2143out:
2144 if (page)
2145 __free_page(page);
2146 if (locations)
2147 kfree(locations);
2148 return status;
2149}
2150
1da177e4
LT		 2151static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2152{
2153 struct nfs4_getattr_arg args = {
2154 .fh = fhandle,
2155 .bitmask = server->attr_bitmask,
2156 };
2157 struct nfs4_getattr_res res = {
2158 .fattr = fattr,
2159 .server = server,
2160 };
2161 struct rpc_message msg = {
2162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2163 .rpc_argp = &args,
2164 .rpc_resp = &res,
2165 };
2166
0e574af1 2167 nfs_fattr_init(fattr);
cccef3b9 2168 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2169}
2170
2171static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2172{
2173 struct nfs4_exception exception = { };
2174 int err;
2175 do {
2176 err = nfs4_handle_exception(server,
2177 _nfs4_proc_getattr(server, fhandle, fattr),
2178 &exception);
2179 } while (exception.retry);
2180 return err;
2181}
2182
2183/*
2184 * The file is not closed if it is opened due to the a request to change
2185 * the size of the file. The open call will not be needed once the
2186 * VFS layer lookup-intents are implemented.
2187 *
2188 * Close is called when the inode is destroyed.
2189 * If we haven't opened the file for O_WRONLY, we
2190 * need to in the size_change case to obtain a stateid.
2191 *
2192 * Got race?
2193 * Because OPEN is always done by name in nfsv4, it is
2194 * possible that we opened a different file by the same
2195 * name. We can recognize this race condition, but we
2196 * can't do anything about it besides returning an error.
2197 *
2198 * This will be fixed with VFS changes (lookup-intent).
2199 */
2200static int
2201nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2202 struct iattr *sattr)
2203{
08e9eac4 2204 struct inode *inode = dentry->d_inode;
659bfcd6 2205 struct rpc_cred *cred = NULL;
d530838b 2206 struct nfs4_state *state = NULL;
1da177e4
LT		 2207 int status;
2208
0e574af1 2209 nfs_fattr_init(fattr);
1da177e4 2210
d530838b 2211 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2212 if (sattr->ia_valid & ATTR_FILE) {
2213 struct nfs_open_context *ctx;
2214
2215 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2216 if (ctx) {
2217 cred = ctx->cred;
2218 state = ctx->state;
2219 }
659bfcd6 2220 }
08e9eac4 2221
659bfcd6 2222 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2223 if (status == 0)
2224 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2225 return status;
2226}
2227
56659e99
TM		 2228static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2229 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2230 struct nfs_fattr *fattr)
2231{
2232 int status;
2233 struct nfs4_lookup_arg args = {
2234 .bitmask = server->attr_bitmask,
2235 .dir_fh = dirfh,
2236 .name = name,
2237 };
2238 struct nfs4_lookup_res res = {
2239 .server = server,
2240 .fattr = fattr,
2241 .fh = fhandle,
2242 };
2243 struct rpc_message msg = {
2244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2245 .rpc_argp = &args,
2246 .rpc_resp = &res,
2247 };
2248
2249 nfs_fattr_init(fattr);
2250
2251 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2252 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2253 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2254 return status;
2255}
2256
2257static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2258 struct qstr *name, struct nfs_fh *fhandle,
2259 struct nfs_fattr *fattr)
2260{
2261 struct nfs4_exception exception = { };
2262 int err;
2263 do {
4e56e082
TM		 2264 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2265 /* FIXME: !!!! */
2266 if (err == -NFS4ERR_MOVED) {
2267 err = -EREMOTE;
2268 break;
2269 }
2270 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2271 } while (exception.retry);
2272 return err;
2273}
2274
56659e99 2275static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2276 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2277{
4e56e082 2278 int status;
1da177e4
LT		 2279
2280 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2281 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2282 if (status == -NFS4ERR_MOVED)
2283 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2284 dprintk("NFS reply lookup: %d\n", status);
2285 return status;
2286}
2287
2288static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2289{
2290 struct nfs4_exception exception = { };
2291 int err;
2292 do {
2293 err = nfs4_handle_exception(NFS_SERVER(dir),
2294 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2295 &exception);
2296 } while (exception.retry);
2297 return err;
2298}
2299
2300static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2301{
76b32999
TM		 2302 struct nfs_server *server = NFS_SERVER(inode);
2303 struct nfs_fattr fattr;
1da177e4
LT		 2304 struct nfs4_accessargs args = {
2305 .fh = NFS_FH(inode),
76b32999
TM		 2306 .bitmask = server->attr_bitmask,
2307 };
2308 struct nfs4_accessres res = {
2309 .server = server,
2310 .fattr = &fattr,
1da177e4 2311 };
1da177e4
LT		 2312 struct rpc_message msg = {
2313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2314 .rpc_argp = &args,
2315 .rpc_resp = &res,
2316 .rpc_cred = entry->cred,
2317 };
2318 int mode = entry->mask;
2319 int status;
2320
2321 /*
2322 * Determine which access bits we want to ask for...
2323 */
2324 if (mode & MAY_READ)
2325 args.access |= NFS4_ACCESS_READ;
2326 if (S_ISDIR(inode->i_mode)) {
2327 if (mode & MAY_WRITE)
2328 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2329 if (mode & MAY_EXEC)
2330 args.access |= NFS4_ACCESS_LOOKUP;
2331 } else {
2332 if (mode & MAY_WRITE)
2333 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2334 if (mode & MAY_EXEC)
2335 args.access |= NFS4_ACCESS_EXECUTE;
2336 }
76b32999 2337 nfs_fattr_init(&fattr);
cccef3b9 2338 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2339 if (!status) {
2340 entry->mask = 0;
2341 if (res.access & NFS4_ACCESS_READ)
2342 entry->mask |= MAY_READ;
2343 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2344 entry->mask |= MAY_WRITE;
2345 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2346 entry->mask |= MAY_EXEC;
76b32999 2347 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2348 }
2349 return status;
2350}
2351
2352static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2353{
2354 struct nfs4_exception exception = { };
2355 int err;
2356 do {
2357 err = nfs4_handle_exception(NFS_SERVER(inode),
2358 _nfs4_proc_access(inode, entry),
2359 &exception);
2360 } while (exception.retry);
2361 return err;
2362}
2363
2364/*
2365 * TODO: For the time being, we don't try to get any attributes
2366 * along with any of the zero-copy operations READ, READDIR,
2367 * READLINK, WRITE.
2368 *
2369 * In the case of the first three, we want to put the GETATTR
2370 * after the read-type operation -- this is because it is hard
2371 * to predict the length of a GETATTR response in v4, and thus
2372 * align the READ data correctly. This means that the GETATTR
2373 * may end up partially falling into the page cache, and we should
2374 * shift it into the 'tail' of the xdr_buf before processing.
2375 * To do this efficiently, we need to know the total length
2376 * of data received, which doesn't seem to be available outside
2377 * of the RPC layer.
2378 *
2379 * In the case of WRITE, we also want to put the GETATTR after
2380 * the operation -- in this case because we want to make sure
2381 * we get the post-operation mtime and size. This means that
2382 * we can't use xdr_encode_pages() as written: we need a variant
2383 * of it which would leave room in the 'tail' iovec.
2384 *
2385 * Both of these changes to the XDR layer would in fact be quite
2386 * minor, but I decided to leave them for a subsequent patch.
2387 */
2388static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2389 unsigned int pgbase, unsigned int pglen)
2390{
2391 struct nfs4_readlink args = {
2392 .fh = NFS_FH(inode),
2393 .pgbase = pgbase,
2394 .pglen = pglen,
2395 .pages = &page,
2396 };
f50c7000 2397 struct nfs4_readlink_res res;
1da177e4
LT		 2398 struct rpc_message msg = {
2399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2400 .rpc_argp = &args,
f50c7000 2401 .rpc_resp = &res,
1da177e4
LT		 2402 };
2403
cccef3b9 2404 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2405}
2406
2407static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2408 unsigned int pgbase, unsigned int pglen)
2409{
2410 struct nfs4_exception exception = { };
2411 int err;
2412 do {
2413 err = nfs4_handle_exception(NFS_SERVER(inode),
2414 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2415 &exception);
2416 } while (exception.retry);
2417 return err;
2418}
2419
1da177e4
LT		 2420/*
2421 * Got race?
2422 * We will need to arrange for the VFS layer to provide an atomic open.
2423 * Until then, this create/open method is prone to inefficiency and race
2424 * conditions due to the lookup, create, and open VFS calls from sys_open()
2425 * placed on the wire.
2426 *
2427 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2428 * The file will be opened again in the subsequent VFS open call
2429 * (nfs4_proc_file_open).
2430 *
2431 * The open for read will just hang around to be used by any process that
2432 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2433 */
2434
2435static int
2436nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2437 int flags, struct nameidata *nd)
1da177e4 2438{
ad389da7 2439 struct path path = {
4ac91378 2440 .mnt = nd->path.mnt,
ad389da7
TM		 2441 .dentry = dentry,
2442 };
1da177e4
LT		 2443 struct nfs4_state *state;
2444 struct rpc_cred *cred;
dc0b027d 2445 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2446 int status = 0;
2447
98a8e323 2448 cred = rpc_lookup_cred();
1da177e4
LT		 2449 if (IS_ERR(cred)) {
2450 status = PTR_ERR(cred);
2451 goto out;
2452 }
dc0b027d 2453 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2454 d_drop(dentry);
1da177e4
LT		 2455 if (IS_ERR(state)) {
2456 status = PTR_ERR(state);
659bfcd6 2457 goto out_putcred;
1da177e4 2458 }
d4d9cdcb 2459 d_add(dentry, igrab(state->inode));
d75340cc 2460 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2461 if (flags & O_EXCL) {
2462 struct nfs_fattr fattr;
659bfcd6 2463 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2464 if (status == 0)
65e4308d 2465 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2466 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2467 }
ad389da7 2468 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2469 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2470 else
dc0b027d 2471 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2472out_putcred:
2473 put_rpccred(cred);
1da177e4
LT		 2474out:
2475 return status;
2476}
2477
2478static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2479{
16e42959 2480 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2481 struct nfs_removeargs args = {
1da177e4 2482 .fh = NFS_FH(dir),
4fdc17b2
TM		 2483 .name.len = name->len,
2484 .name.name = name->name,
16e42959
TM		 2485 .bitmask = server->attr_bitmask,
2486 };
4fdc17b2 2487 struct nfs_removeres res = {
16e42959 2488 .server = server,
1da177e4 2489 };
1da177e4 2490 struct rpc_message msg = {
4fdc17b2
TM		 2491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2492 .rpc_argp = &args,
2493 .rpc_resp = &res,
1da177e4
LT		 2494 };
2495 int status;
2496
4fdc17b2 2497 nfs_fattr_init(&res.dir_attr);
cccef3b9 2498 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2499 if (status == 0) {
2500 update_changeattr(dir, &res.cinfo);
4fdc17b2 2501 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2502 }
1da177e4
LT		 2503 return status;
2504}
2505
2506static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2507{
2508 struct nfs4_exception exception = { };
2509 int err;
2510 do {
2511 err = nfs4_handle_exception(NFS_SERVER(dir),
2512 _nfs4_proc_remove(dir, name),
2513 &exception);
2514 } while (exception.retry);
2515 return err;
2516}
2517
e4eff1a6 2518static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2519{
e4eff1a6
TM		 2520 struct nfs_server *server = NFS_SERVER(dir);
2521 struct nfs_removeargs *args = msg->rpc_argp;
2522 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2523
a65318bf 2524 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2525 res->server = server;
1da177e4 2526 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2527}
2528
e4eff1a6 2529static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2530{
e4eff1a6
TM		 2531 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2532
472cfbd9 2533 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2534 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2535 return 0;
2536 update_changeattr(dir, &res->cinfo);
2537 nfs_post_op_update_inode(dir, &res->dir_attr);
2538 return 1;
1da177e4
LT		 2539}
2540
2541static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2542 struct inode *new_dir, struct qstr *new_name)
2543{
6caf2c82 2544 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2545 struct nfs4_rename_arg arg = {
2546 .old_dir = NFS_FH(old_dir),
2547 .new_dir = NFS_FH(new_dir),
2548 .old_name = old_name,
2549 .new_name = new_name,
6caf2c82
TM		 2550 .bitmask = server->attr_bitmask,
2551 };
2552 struct nfs_fattr old_fattr, new_fattr;
2553 struct nfs4_rename_res res = {
2554 .server = server,
2555 .old_fattr = &old_fattr,
2556 .new_fattr = &new_fattr,
1da177e4 2557 };
1da177e4
LT		 2558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2560 .rpc_argp = &arg,
2561 .rpc_resp = &res,
2562 };
2563 int status;
2564
6caf2c82
TM		 2565 nfs_fattr_init(res.old_fattr);
2566 nfs_fattr_init(res.new_fattr);
cccef3b9 2567 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2568
2569 if (!status) {
2570 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2571 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2572 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2573 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2574 }
2575 return status;
2576}
2577
2578static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2579 struct inode *new_dir, struct qstr *new_name)
2580{
2581 struct nfs4_exception exception = { };
2582 int err;
2583 do {
2584 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2585 _nfs4_proc_rename(old_dir, old_name,
2586 new_dir, new_name),
2587 &exception);
2588 } while (exception.retry);
2589 return err;
2590}
2591
2592static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2593{
91ba2eee 2594 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2595 struct nfs4_link_arg arg = {
2596 .fh = NFS_FH(inode),
2597 .dir_fh = NFS_FH(dir),
2598 .name = name,
91ba2eee
TM		 2599 .bitmask = server->attr_bitmask,
2600 };
2601 struct nfs_fattr fattr, dir_attr;
2602 struct nfs4_link_res res = {
2603 .server = server,
2604 .fattr = &fattr,
2605 .dir_attr = &dir_attr,
1da177e4 2606 };
1da177e4
LT		 2607 struct rpc_message msg = {
2608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2609 .rpc_argp = &arg,
91ba2eee 2610 .rpc_resp = &res,
1da177e4
LT		 2611 };
2612 int status;
2613
91ba2eee
TM		 2614 nfs_fattr_init(res.fattr);
2615 nfs_fattr_init(res.dir_attr);
cccef3b9 2616 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2617 if (!status) {
2618 update_changeattr(dir, &res.cinfo);
2619 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2620 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2621 }
1da177e4
LT		 2622
2623 return status;
2624}
2625
2626static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2627{
2628 struct nfs4_exception exception = { };
2629 int err;
2630 do {
2631 err = nfs4_handle_exception(NFS_SERVER(inode),
2632 _nfs4_proc_link(inode, dir, name),
2633 &exception);
2634 } while (exception.retry);
2635 return err;
2636}
2637
57dc9a57
TM		 2638struct nfs4_createdata {
2639 struct rpc_message msg;
2640 struct nfs4_create_arg arg;
2641 struct nfs4_create_res res;
2642 struct nfs_fh fh;
2643 struct nfs_fattr fattr;
2644 struct nfs_fattr dir_fattr;
2645};
2646
2647static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2648 struct qstr *name, struct iattr *sattr, u32 ftype)
2649{
2650 struct nfs4_createdata *data;
2651
2652 data = kzalloc(sizeof(*data), GFP_KERNEL);
2653 if (data != NULL) {
2654 struct nfs_server *server = NFS_SERVER(dir);
2655
2656 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2657 data->msg.rpc_argp = &data->arg;
2658 data->msg.rpc_resp = &data->res;
2659 data->arg.dir_fh = NFS_FH(dir);
2660 data->arg.server = server;
2661 data->arg.name = name;
2662 data->arg.attrs = sattr;
2663 data->arg.ftype = ftype;
2664 data->arg.bitmask = server->attr_bitmask;
2665 data->res.server = server;
2666 data->res.fh = &data->fh;
2667 data->res.fattr = &data->fattr;
2668 data->res.dir_fattr = &data->dir_fattr;
2669 nfs_fattr_init(data->res.fattr);
2670 nfs_fattr_init(data->res.dir_fattr);
2671 }
2672 return data;
2673}
2674
2675static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2676{
cccef3b9
AA		 2677 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2678 &data->arg, &data->res, 1);
57dc9a57
TM		 2679 if (status == 0) {
2680 update_changeattr(dir, &data->res.dir_cinfo);
2681 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2682 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2683 }
2684 return status;
2685}
2686
2687static void nfs4_free_createdata(struct nfs4_createdata *data)
2688{
2689 kfree(data);
2690}
2691
4f390c15 2692static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2693 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2694{
57dc9a57
TM		 2695 struct nfs4_createdata *data;
2696 int status = -ENAMETOOLONG;
1da177e4 2697
94a6d753 2698 if (len > NFS4_MAXPATHLEN)
57dc9a57 2699 goto out;
4f390c15 2700
57dc9a57
TM		 2701 status = -ENOMEM;
2702 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2703 if (data == NULL)
2704 goto out;
2705
2706 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2707 data->arg.u.symlink.pages = &page;
2708 data->arg.u.symlink.len = len;
1da177e4 2709
57dc9a57
TM		 2710 status = nfs4_do_create(dir, dentry, data);
2711
2712 nfs4_free_createdata(data);
2713out:
1da177e4
LT		 2714 return status;
2715}
2716
4f390c15 2717static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2718 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2719{
2720 struct nfs4_exception exception = { };
2721 int err;
2722 do {
2723 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2724 _nfs4_proc_symlink(dir, dentry, page,
2725 len, sattr),
1da177e4
LT		 2726 &exception);
2727 } while (exception.retry);
2728 return err;
2729}
2730
2731static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2732 struct iattr *sattr)
2733{
57dc9a57
TM		 2734 struct nfs4_createdata *data;
2735 int status = -ENOMEM;
1da177e4 2736
57dc9a57
TM		 2737 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2738 if (data == NULL)
2739 goto out;
2740
2741 status = nfs4_do_create(dir, dentry, data);
2742
2743 nfs4_free_createdata(data);
2744out:
1da177e4
LT		 2745 return status;
2746}
2747
2748static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2749 struct iattr *sattr)
2750{
2751 struct nfs4_exception exception = { };
2752 int err;
2753 do {
2754 err = nfs4_handle_exception(NFS_SERVER(dir),
2755 _nfs4_proc_mkdir(dir, dentry, sattr),
2756 &exception);
2757 } while (exception.retry);
2758 return err;
2759}
2760
2761static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2762 u64 cookie, struct page *page, unsigned int count, int plus)
2763{
2764 struct inode *dir = dentry->d_inode;
2765 struct nfs4_readdir_arg args = {
2766 .fh = NFS_FH(dir),
2767 .pages = &page,
2768 .pgbase = 0,
2769 .count = count,
96d25e53 2770 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2771 };
2772 struct nfs4_readdir_res res;
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2775 .rpc_argp = &args,
2776 .rpc_resp = &res,
2777 .rpc_cred = cred,
2778 };
2779 int status;
2780
3110ff80 2781 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2782 dentry->d_parent->d_name.name,
2783 dentry->d_name.name,
2784 (unsigned long long)cookie);
1da177e4
LT		 2785 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2786 res.pgbase = args.pgbase;
cccef3b9 2787 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2788 if (status == 0)
2789 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2790
2791 nfs_invalidate_atime(dir);
2792
3110ff80 2793 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2794 return status;
2795}
2796
2797static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2798 u64 cookie, struct page *page, unsigned int count, int plus)
2799{
2800 struct nfs4_exception exception = { };
2801 int err;
2802 do {
2803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2804 _nfs4_proc_readdir(dentry, cred, cookie,
2805 page, count, plus),
2806 &exception);
2807 } while (exception.retry);
2808 return err;
2809}
2810
2811static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2812 struct iattr *sattr, dev_t rdev)
2813{
57dc9a57
TM		 2814 struct nfs4_createdata *data;
2815 int mode = sattr->ia_mode;
2816 int status = -ENOMEM;
1da177e4
LT		 2817
2818 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2819 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2820
2821 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2822 if (data == NULL)
2823 goto out;
2824
1da177e4 2825 if (S_ISFIFO(mode))
57dc9a57 2826 data->arg.ftype = NF4FIFO;
1da177e4 2827 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2828 data->arg.ftype = NF4BLK;
2829 data->arg.u.device.specdata1 = MAJOR(rdev);
2830 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2831 }
2832 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2833 data->arg.ftype = NF4CHR;
2834 data->arg.u.device.specdata1 = MAJOR(rdev);
2835 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2836 }
1da177e4 2837
57dc9a57
TM		 2838 status = nfs4_do_create(dir, dentry, data);
2839
2840 nfs4_free_createdata(data);
2841out:
1da177e4
LT		 2842 return status;
2843}
2844
2845static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2846 struct iattr *sattr, dev_t rdev)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(NFS_SERVER(dir),
2852 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
2858static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2859 struct nfs_fsstat *fsstat)
2860{
2861 struct nfs4_statfs_arg args = {
2862 .fh = fhandle,
2863 .bitmask = server->attr_bitmask,
2864 };
24ad148a
BH		 2865 struct nfs4_statfs_res res = {
2866 .fsstat = fsstat,
2867 };
1da177e4
LT		 2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2870 .rpc_argp = &args,
24ad148a 2871 .rpc_resp = &res,
1da177e4
LT		 2872 };
2873
0e574af1 2874 nfs_fattr_init(fsstat->fattr);
cccef3b9 2875 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2876}
2877
2878static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2879{
2880 struct nfs4_exception exception = { };
2881 int err;
2882 do {
2883 err = nfs4_handle_exception(server,
2884 _nfs4_proc_statfs(server, fhandle, fsstat),
2885 &exception);
2886 } while (exception.retry);
2887 return err;
2888}
2889
2890static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2891 struct nfs_fsinfo *fsinfo)
2892{
2893 struct nfs4_fsinfo_arg args = {
2894 .fh = fhandle,
2895 .bitmask = server->attr_bitmask,
2896 };
3dda5e43
BH		 2897 struct nfs4_fsinfo_res res = {
2898 .fsinfo = fsinfo,
2899 };
1da177e4
LT		 2900 struct rpc_message msg = {
2901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2902 .rpc_argp = &args,
3dda5e43 2903 .rpc_resp = &res,
1da177e4
LT		 2904 };
2905
cccef3b9 2906 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2907}
2908
2909static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2910{
2911 struct nfs4_exception exception = { };
2912 int err;
2913
2914 do {
2915 err = nfs4_handle_exception(server,
2916 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2923{
0e574af1 2924 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2925 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2926}
2927
2928static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2929 struct nfs_pathconf *pathconf)
2930{
2931 struct nfs4_pathconf_arg args = {
2932 .fh = fhandle,
2933 .bitmask = server->attr_bitmask,
2934 };
d45b2989
BH		 2935 struct nfs4_pathconf_res res = {
2936 .pathconf = pathconf,
2937 };
1da177e4
LT		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2940 .rpc_argp = &args,
d45b2989 2941 .rpc_resp = &res,
1da177e4
LT		 2942 };
2943
2944 /* None of the pathconf attributes are mandatory to implement */
2945 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2946 memset(pathconf, 0, sizeof(*pathconf));
2947 return 0;
2948 }
2949
0e574af1 2950 nfs_fattr_init(pathconf->fattr);
cccef3b9 2951 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2952}
2953
2954static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_pathconf *pathconf)
2956{
2957 struct nfs4_exception exception = { };
2958 int err;
2959
2960 do {
2961 err = nfs4_handle_exception(server,
2962 _nfs4_proc_pathconf(server, fhandle, pathconf),
2963 &exception);
2964 } while (exception.retry);
2965 return err;
2966}
2967
ec06c096 2968static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2969{
ec06c096 2970 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2971
f11c88af
AA		 2972 dprintk("--> %s\n", __func__);
2973
f11c88af
AA		 2974 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2975
9e33bed5 2976 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d61e612a 2977 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2978 return -EAGAIN;
1da177e4 2979 }
8850df99
TM		 2980
2981 nfs_invalidate_atime(data->inode);
1da177e4 2982 if (task->tk_status > 0)
ec06c096
TM		 2983 renew_lease(server, data->timestamp);
2984 return 0;
1da177e4
LT		 2985}
2986
bdc7f021 2987static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2988{
1da177e4 2989 data->timestamp = jiffies;
bdc7f021 2990 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2991}
2992
788e7a89 2993static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2994{
1da177e4
LT		 2995 struct inode *inode = data->inode;
2996
def6ed7e
AA		 2997 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2998 task->tk_status);
2999
9e33bed5 3000 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d61e612a 3001 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3002 return -EAGAIN;
1da177e4 3003 }
4f9838c7 3004 if (task->tk_status >= 0) {
1da177e4 3005 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3006 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3007 }
788e7a89 3008 return 0;
1da177e4
LT		 3009}
3010
bdc7f021 3011static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3012{
bdc7f021
TM		 3013 struct nfs_server *server = NFS_SERVER(data->inode);
3014
a65318bf 3015 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3016 data->res.server = server;
1da177e4
LT		 3017 data->timestamp = jiffies;
3018
bdc7f021 3019 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3020}
3021
788e7a89 3022static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3023{
1da177e4
LT		 3024 struct inode *inode = data->inode;
3025
21d9a851
AA		 3026 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3027 task->tk_status);
9e33bed5 3028 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d61e612a 3029 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3030 return -EAGAIN;
1da177e4 3031 }
9e08a3c5 3032 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3033 return 0;
1da177e4
LT		 3034}
3035
bdc7f021 3036static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3037{
788e7a89 3038 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3039
a65318bf 3040 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3041 data->res.server = server;
bdc7f021 3042 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3043}
3044
3045/*
3046 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3047 * standalone procedure for queueing an asynchronous RENEW.
3048 */
963d8fe5 3049static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3050{
adfa6f98 3051 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3052 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3053
3054 if (task->tk_status < 0) {
95baa25c
TM		 3055 /* Unless we're shutting down, schedule state recovery! */
3056 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3057 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3058 return;
3059 }
3060 spin_lock(&clp->cl_lock);
3061 if (time_before(clp->cl_last_renewal,timestamp))
3062 clp->cl_last_renewal = timestamp;
3063 spin_unlock(&clp->cl_lock);
3064}
3065
963d8fe5
TM		 3066static const struct rpc_call_ops nfs4_renew_ops = {
3067 .rpc_call_done = nfs4_renew_done,
3068};
3069
adfa6f98 3070int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3071{
3072 struct rpc_message msg = {
3073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3074 .rpc_argp = clp,
b4454fe1 3075 .rpc_cred = cred,
1da177e4
LT		 3076 };
3077
3078 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3079 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3080}
3081
adfa6f98 3082int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3083{
3084 struct rpc_message msg = {
3085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3086 .rpc_argp = clp,
b4454fe1 3087 .rpc_cred = cred,
1da177e4
LT		 3088 };
3089 unsigned long now = jiffies;
3090 int status;
3091
3092 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3093 if (status < 0)
3094 return status;
3095 spin_lock(&clp->cl_lock);
3096 if (time_before(clp->cl_last_renewal,now))
3097 clp->cl_last_renewal = now;
3098 spin_unlock(&clp->cl_lock);
3099 return 0;
3100}
3101
aa1870af
BF		 3102static inline int nfs4_server_supports_acls(struct nfs_server *server)
3103{
3104 return (server->caps & NFS_CAP_ACLS)
3105 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3106 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3107}
3108
3109/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3110 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3111 * the stack.
3112 */
3113#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3114
3115static void buf_to_pages(const void *buf, size_t buflen,
3116 struct page **pages, unsigned int *pgbase)
3117{
3118 const void *p = buf;
3119
3120 *pgbase = offset_in_page(buf);
3121 p -= *pgbase;
3122 while (p < buf + buflen) {
3123 *(pages++) = virt_to_page(p);
3124 p += PAGE_CACHE_SIZE;
3125 }
3126}
3127
e50a1c2e
BF		 3128struct nfs4_cached_acl {
3129 int cached;
3130 size_t len;
3e9d4154 3131 char data[0];
e50a1c2e
BF		 3132};
3133
3134static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3135{
3136 struct nfs_inode *nfsi = NFS_I(inode);
3137
3138 spin_lock(&inode->i_lock);
3139 kfree(nfsi->nfs4_acl);
3140 nfsi->nfs4_acl = acl;
3141 spin_unlock(&inode->i_lock);
3142}
3143
3144static void nfs4_zap_acl_attr(struct inode *inode)
3145{
3146 nfs4_set_cached_acl(inode, NULL);
3147}
3148
3149static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3150{
3151 struct nfs_inode *nfsi = NFS_I(inode);
3152 struct nfs4_cached_acl *acl;
3153 int ret = -ENOENT;
3154
3155 spin_lock(&inode->i_lock);
3156 acl = nfsi->nfs4_acl;
3157 if (acl == NULL)
3158 goto out;
3159 if (buf == NULL) /* user is just asking for length */
3160 goto out_len;
3161 if (acl->cached == 0)
3162 goto out;
3163 ret = -ERANGE; /* see getxattr(2) man page */
3164 if (acl->len > buflen)
3165 goto out;
3166 memcpy(buf, acl->data, acl->len);
3167out_len:
3168 ret = acl->len;
3169out:
3170 spin_unlock(&inode->i_lock);
3171 return ret;
3172}
3173
3174static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3175{
3176 struct nfs4_cached_acl *acl;
3177
3178 if (buf && acl_len <= PAGE_SIZE) {
3179 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3180 if (acl == NULL)
3181 goto out;
3182 acl->cached = 1;
3183 memcpy(acl->data, buf, acl_len);
3184 } else {
3185 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3186 if (acl == NULL)
3187 goto out;
3188 acl->cached = 0;
3189 }
3190 acl->len = acl_len;
3191out:
3192 nfs4_set_cached_acl(inode, acl);
3193}
3194
16b4289c 3195static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3196{
aa1870af
BF		 3197 struct page *pages[NFS4ACL_MAXPAGES];
3198 struct nfs_getaclargs args = {
3199 .fh = NFS_FH(inode),
3200 .acl_pages = pages,
3201 .acl_len = buflen,
3202 };
663c79b3
BH		 3203 struct nfs_getaclres res = {
3204 .acl_len = buflen,
3205 };
e50a1c2e 3206 void *resp_buf;
aa1870af
BF		 3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3209 .rpc_argp = &args,
663c79b3 3210 .rpc_resp = &res,
aa1870af 3211 };
e50a1c2e 3212 struct page *localpage = NULL;
aa1870af
BF		 3213 int ret;
3214
e50a1c2e
BF		 3215 if (buflen < PAGE_SIZE) {
3216 /* As long as we're doing a round trip to the server anyway,
3217 * let's be prepared for a page of acl data. */
3218 localpage = alloc_page(GFP_KERNEL);
3219 resp_buf = page_address(localpage);
3220 if (localpage == NULL)
3221 return -ENOMEM;
3222 args.acl_pages[0] = localpage;
3223 args.acl_pgbase = 0;
663c79b3 3224 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3225 } else {
3226 resp_buf = buf;
3227 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3228 }
cccef3b9 3229 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3230 if (ret)
3231 goto out_free;
663c79b3
BH		 3232 if (res.acl_len > args.acl_len)
3233 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3234 else
663c79b3 3235 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3236 if (buf) {
3237 ret = -ERANGE;
663c79b3 3238 if (res.acl_len > buflen)
e50a1c2e
BF		 3239 goto out_free;
3240 if (localpage)
663c79b3 3241 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3242 }
663c79b3 3243 ret = res.acl_len;
e50a1c2e
BF		 3244out_free:
3245 if (localpage)
3246 __free_page(localpage);
aa1870af
BF		 3247 return ret;
3248}
3249
16b4289c
TM		 3250static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3251{
3252 struct nfs4_exception exception = { };
3253 ssize_t ret;
3254 do {
3255 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3256 if (ret >= 0)
3257 break;
3258 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3259 } while (exception.retry);
3260 return ret;
3261}
3262
e50a1c2e
BF		 3263static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3264{
3265 struct nfs_server *server = NFS_SERVER(inode);
3266 int ret;
3267
3268 if (!nfs4_server_supports_acls(server))
3269 return -EOPNOTSUPP;
3270 ret = nfs_revalidate_inode(server, inode);
3271 if (ret < 0)
3272 return ret;
3273 ret = nfs4_read_cached_acl(inode, buf, buflen);
3274 if (ret != -ENOENT)
3275 return ret;
3276 return nfs4_get_acl_uncached(inode, buf, buflen);
3277}
3278
16b4289c 3279static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3280{
3281 struct nfs_server *server = NFS_SERVER(inode);
3282 struct page *pages[NFS4ACL_MAXPAGES];
3283 struct nfs_setaclargs arg = {
3284 .fh = NFS_FH(inode),
3285 .acl_pages = pages,
3286 .acl_len = buflen,
3287 };
73c403a9 3288 struct nfs_setaclres res;
4b580ee3
BF		 3289 struct rpc_message msg = {
3290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3291 .rpc_argp = &arg,
73c403a9 3292 .rpc_resp = &res,
4b580ee3
BF		 3293 };
3294 int ret;
3295
3296 if (!nfs4_server_supports_acls(server))
3297 return -EOPNOTSUPP;
642ac549 3298 nfs_inode_return_delegation(inode);
4b580ee3 3299 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3300 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3301 nfs_access_zap_cache(inode);
3302 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3303 return ret;
3304}
3305
16b4289c
TM		 3306static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3307{
3308 struct nfs4_exception exception = { };
3309 int err;
3310 do {
3311 err = nfs4_handle_exception(NFS_SERVER(inode),
3312 __nfs4_proc_set_acl(inode, buf, buflen),
3313 &exception);
3314 } while (exception.retry);
3315 return err;
3316}
3317
1da177e4 3318static int
8328d59f 3319_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3320{
1da177e4
LT		 3321 if (!clp || task->tk_status >= 0)
3322 return 0;
3323 switch(task->tk_status) {
9e33bed5
TM		 3324 case -NFS4ERR_ADMIN_REVOKED:
3325 case -NFS4ERR_BAD_STATEID:
3326 case -NFS4ERR_OPENMODE:
3327 if (state == NULL)
3328 break;
3329 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3330 case -NFS4ERR_STALE_CLIENTID:
3331 case -NFS4ERR_STALE_STATEID:
3332 case -NFS4ERR_EXPIRED:
5d00837b 3333 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3334 nfs4_schedule_state_recovery(clp);
e005e804 3335 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3336 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3337 task->tk_status = 0;
3338 return -EAGAIN;
4745e315
AA		 3339#if defined(CONFIG_NFS_V4_1)
3340 case -NFS4ERR_BADSESSION:
3341 case -NFS4ERR_BADSLOT:
3342 case -NFS4ERR_BAD_HIGH_SLOT:
3343 case -NFS4ERR_DEADSESSION:
3344 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3345 case -NFS4ERR_SEQ_FALSE_RETRY:
3346 case -NFS4ERR_SEQ_MISORDERED:
3347 dprintk("%s ERROR %d, Reset session\n", __func__,
3348 task->tk_status);
0b9e2d41 3349 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3350 task->tk_status = 0;
3351 return -EAGAIN;
3352#endif /* CONFIG_NFS_V4_1 */
1da177e4 3353 case -NFS4ERR_DELAY:
8328d59f
AA		 3354 if (server)
3355 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3356 case -NFS4ERR_GRACE:
1da177e4
LT		 3357 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3358 task->tk_status = 0;
3359 return -EAGAIN;
3360 case -NFS4ERR_OLD_STATEID:
3361 task->tk_status = 0;
3362 return -EAGAIN;
3363 }
3364 task->tk_status = nfs4_map_errors(task->tk_status);
3365 return 0;
3366}
3367
8328d59f
AA		 3368static int
3369nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3370{
3371 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3372}
3373
adfa6f98 3374int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3375{
3376 nfs4_verifier sc_verifier;
3377 struct nfs4_setclientid setclientid = {
3378 .sc_verifier = &sc_verifier,
3379 .sc_prog = program,
3380 };
3381 struct rpc_message msg = {
3382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3383 .rpc_argp = &setclientid,
3384 .rpc_resp = clp,
286d7d6a 3385 .rpc_cred = cred,
1da177e4 3386 };
bc4785cd 3387 __be32 *p;
1da177e4
LT		 3388 int loop = 0;
3389 int status;
3390
bc4785cd 3391 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3392 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3393 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3394
3395 for(;;) {
3396 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3397 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3398 clp->cl_ipaddr,
3399 rpc_peeraddr2str(clp->cl_rpcclient,
3400 RPC_DISPLAY_ADDR),
69dd716c
TM		 3401 rpc_peeraddr2str(clp->cl_rpcclient,
3402 RPC_DISPLAY_PROTO),
78ea323b 3403 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3404 clp->cl_id_uniquifier);
3405 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3406 sizeof(setclientid.sc_netid),
3407 rpc_peeraddr2str(clp->cl_rpcclient,
3408 RPC_DISPLAY_NETID));
1da177e4 3409 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3410 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3411 clp->cl_ipaddr, port >> 8, port & 255);
3412
3413 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3414 if (status != -NFS4ERR_CLID_INUSE)
3415 break;
3416 if (signalled())
3417 break;
3418 if (loop++ & 1)
3419 ssleep(clp->cl_lease_time + 1);
3420 else
3421 if (++clp->cl_id_uniquifier == 0)
3422 break;
3423 }
3424 return status;
3425}
3426
adfa6f98 3427static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3428{
3429 struct nfs_fsinfo fsinfo;
3430 struct rpc_message msg = {
3431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3432 .rpc_argp = clp,
3433 .rpc_resp = &fsinfo,
286d7d6a 3434 .rpc_cred = cred,
1da177e4
LT		 3435 };
3436 unsigned long now;
3437 int status;
3438
3439 now = jiffies;
3440 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3441 if (status == 0) {
3442 spin_lock(&clp->cl_lock);
3443 clp->cl_lease_time = fsinfo.lease_time * HZ;
3444 clp->cl_last_renewal = now;
3445 spin_unlock(&clp->cl_lock);
3446 }
3447 return status;
3448}
3449
adfa6f98 3450int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3451{
77e03677 3452 long timeout = 0;
51581f3b
TM		 3453 int err;
3454 do {
3455 err = _nfs4_proc_setclientid_confirm(clp, cred);
3456 switch (err) {
3457 case 0:
3458 return err;
3459 case -NFS4ERR_RESOURCE:
3460 /* The IBM lawyers misread another document! */
3461 case -NFS4ERR_DELAY:
3462 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3463 }
3464 } while (err == 0);
3465 return err;
3466}
3467
fe650407
TM		 3468struct nfs4_delegreturndata {
3469 struct nfs4_delegreturnargs args;
fa178f29 3470 struct nfs4_delegreturnres res;
fe650407
TM		 3471 struct nfs_fh fh;
3472 nfs4_stateid stateid;
26e976a8 3473 unsigned long timestamp;
fa178f29 3474 struct nfs_fattr fattr;
fe650407
TM		 3475 int rpc_status;
3476};
3477
fe650407
TM		 3478static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3479{
3480 struct nfs4_delegreturndata *data = calldata;
938e1010 3481
d61e612a
TM		 3482 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3483 task->tk_status);
938e1010 3484
fe650407 3485 data->rpc_status = task->tk_status;
26e976a8 3486 if (data->rpc_status == 0)
fa178f29 3487 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3488}
3489
3490static void nfs4_delegreturn_release(void *calldata)
3491{
fe650407
TM		 3492 kfree(calldata);
3493}
3494
938e1010
AA		 3495#if defined(CONFIG_NFS_V4_1)
3496static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3497{
3498 struct nfs4_delegreturndata *d_data;
3499
3500 d_data = (struct nfs4_delegreturndata *)data;
3501
3502 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3503 &d_data->args.seq_args,
3504 &d_data->res.seq_res, 1, task))
3505 return;
3506 rpc_call_start(task);
3507}
3508#endif /* CONFIG_NFS_V4_1 */
3509
c8d149f3 3510static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3511#if defined(CONFIG_NFS_V4_1)
3512 .rpc_call_prepare = nfs4_delegreturn_prepare,
3513#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3514 .rpc_call_done = nfs4_delegreturn_done,
3515 .rpc_release = nfs4_delegreturn_release,
3516};
3517
e6f81075 3518static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3519{
3520 struct nfs4_delegreturndata *data;
fa178f29 3521 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3522 struct rpc_task *task;
5138fde0
TM		 3523 struct rpc_message msg = {
3524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3525 .rpc_cred = cred,
3526 };
c970aa85
TM		 3527 struct rpc_task_setup task_setup_data = {
3528 .rpc_client = server->client,
5138fde0 3529 .rpc_message = &msg,
c970aa85
TM		 3530 .callback_ops = &nfs4_delegreturn_ops,
3531 .flags = RPC_TASK_ASYNC,
3532 };
e6f81075 3533 int status = 0;
fe650407 3534
938e1010 3535 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3536 if (data == NULL)
3537 return -ENOMEM;
3538 data->args.fhandle = &data->fh;
3539 data->args.stateid = &data->stateid;
fa178f29 3540 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3541 nfs_copy_fh(&data->fh, NFS_FH(inode));
3542 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3543 data->res.fattr = &data->fattr;
3544 data->res.server = server;
5f7dbd5c 3545 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3546 nfs_fattr_init(data->res.fattr);
26e976a8 3547 data->timestamp = jiffies;
fe650407
TM		 3548 data->rpc_status = 0;
3549
c970aa85 3550 task_setup_data.callback_data = data;
5138fde0
TM		 3551 msg.rpc_argp = &data->args,
3552 msg.rpc_resp = &data->res,
c970aa85 3553 task = rpc_run_task(&task_setup_data);
7a1218a2 3554 if (IS_ERR(task))
fe650407 3555 return PTR_ERR(task);
e6f81075
TM		 3556 if (!issync)
3557 goto out;
fe650407 3558 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3559 if (status != 0)
3560 goto out;
3561 status = data->rpc_status;
3562 if (status != 0)
3563 goto out;
3564 nfs_refresh_inode(inode, &data->fattr);
3565out:
e6b3c4db 3566 rpc_put_task(task);
fe650407 3567 return status;
1da177e4
LT		 3568}
3569
e6f81075 3570int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3571{
3572 struct nfs_server *server = NFS_SERVER(inode);
3573 struct nfs4_exception exception = { };
3574 int err;
3575 do {
e6f81075 3576 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3577 switch (err) {
3578 case -NFS4ERR_STALE_STATEID:
3579 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3580 case 0:
3581 return 0;
3582 }
3583 err = nfs4_handle_exception(server, err, &exception);
3584 } while (exception.retry);
3585 return err;
3586}
3587
3588#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3589#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3590
3591/*
3592 * sleep, with exponential backoff, and retry the LOCK operation.
3593 */
3594static unsigned long
3595nfs4_set_lock_task_retry(unsigned long timeout)
3596{
150030b7 3597 schedule_timeout_killable(timeout);
1da177e4
LT		 3598 timeout <<= 1;
3599 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3600 return NFS4_LOCK_MAXTIMEOUT;
3601 return timeout;
3602}
3603
1da177e4
LT		 3604static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3605{
3606 struct inode *inode = state->inode;
3607 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3608 struct nfs_client *clp = server->nfs_client;
911d1aaf 3609 struct nfs_lockt_args arg = {
1da177e4 3610 .fh = NFS_FH(inode),
911d1aaf 3611 .fl = request,
1da177e4 3612 };
911d1aaf
TM		 3613 struct nfs_lockt_res res = {
3614 .denied = request,
1da177e4
LT		 3615 };
3616 struct rpc_message msg = {
3617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3618 .rpc_argp = &arg,
3619 .rpc_resp = &res,
3620 .rpc_cred = state->owner->so_cred,
3621 };
1da177e4
LT		 3622 struct nfs4_lock_state *lsp;
3623 int status;
3624
911d1aaf 3625 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3626 status = nfs4_set_lock_state(state, request);
3627 if (status != 0)
3628 goto out;
3629 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3630 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3631 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3632 switch (status) {
3633 case 0:
3634 request->fl_type = F_UNLCK;
3635 break;
3636 case -NFS4ERR_DENIED:
3637 status = 0;
1da177e4 3638 }
70cc6487 3639 request->fl_ops->fl_release_private(request);
8d0a8a9d 3640out:
1da177e4
LT		 3641 return status;
3642}
3643
3644static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3645{
3646 struct nfs4_exception exception = { };
3647 int err;
3648
3649 do {
3650 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3651 _nfs4_proc_getlk(state, cmd, request),
3652 &exception);
3653 } while (exception.retry);
3654 return err;
3655}
3656
3657static int do_vfs_lock(struct file *file, struct file_lock *fl)
3658{
3659 int res = 0;
3660 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3661 case FL_POSIX:
3662 res = posix_lock_file_wait(file, fl);
3663 break;
3664 case FL_FLOCK:
3665 res = flock_lock_file_wait(file, fl);
3666 break;
3667 default:
3668 BUG();
3669 }
1da177e4
LT		 3670 return res;
3671}
3672
faf5f49c 3673struct nfs4_unlockdata {
911d1aaf
TM		 3674 struct nfs_locku_args arg;
3675 struct nfs_locku_res res;
faf5f49c
TM		 3676 struct nfs4_lock_state *lsp;
3677 struct nfs_open_context *ctx;
911d1aaf
TM		 3678 struct file_lock fl;
3679 const struct nfs_server *server;
26e976a8 3680 unsigned long timestamp;
faf5f49c
TM		 3681};
3682
911d1aaf
TM		 3683static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3684 struct nfs_open_context *ctx,
3685 struct nfs4_lock_state *lsp,
3686 struct nfs_seqid *seqid)
3687{
3688 struct nfs4_unlockdata *p;
3689 struct inode *inode = lsp->ls_state->inode;
3690
a893693c 3691 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3692 if (p == NULL)
3693 return NULL;
3694 p->arg.fh = NFS_FH(inode);
3695 p->arg.fl = &p->fl;
3696 p->arg.seqid = seqid;
c1d51931 3697 p->res.seqid = seqid;
5f7dbd5c 3698 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3699 p->arg.stateid = &lsp->ls_stateid;
3700 p->lsp = lsp;
3701 atomic_inc(&lsp->ls_count);
3702 /* Ensure we don't close file until we're done freeing locks! */
3703 p->ctx = get_nfs_open_context(ctx);
3704 memcpy(&p->fl, fl, sizeof(p->fl));
3705 p->server = NFS_SERVER(inode);
3706 return p;
3707}
3708
06f814a3 3709static void nfs4_locku_release_calldata(void *data)
faf5f49c 3710{
963d8fe5 3711 struct nfs4_unlockdata *calldata = data;
911d1aaf 3712 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3713 nfs4_put_lock_state(calldata->lsp);
3714 put_nfs_open_context(calldata->ctx);
3715 kfree(calldata);
faf5f49c
TM		 3716}
3717
963d8fe5 3718static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3719{
963d8fe5 3720 struct nfs4_unlockdata *calldata = data;
faf5f49c 3721
a893693c
AA		 3722 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3723 task->tk_status);
06f814a3
TM		 3724 if (RPC_ASSASSINATED(task))
3725 return;
faf5f49c
TM		 3726 switch (task->tk_status) {
3727 case 0:
3728 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3729 calldata->res.stateid.data,
faf5f49c 3730 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3731 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3732 break;
9e33bed5
TM		 3733 case -NFS4ERR_BAD_STATEID:
3734 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3735 case -NFS4ERR_STALE_STATEID:
3736 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3737 break;
3738 default:
9e33bed5 3739 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e 3740 nfs4_restart_rpc(task,
d61e612a 3741 calldata->server->nfs_client);
faf5f49c 3742 }
faf5f49c
TM		 3743}
3744
4ce70ada 3745static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3746{
4ce70ada 3747 struct nfs4_unlockdata *calldata = data;
faf5f49c 3748
911d1aaf 3749 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3750 return;
3751 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3752 /* Note: exit _without_ running nfs4_locku_done */
3753 task->tk_action = NULL;
faf5f49c
TM		 3754 return;
3755 }
26e976a8 3756 calldata->timestamp = jiffies;
a893693c
AA		 3757 if (nfs4_setup_sequence(calldata->server->nfs_client,
3758 &calldata->arg.seq_args,
3759 &calldata->res.seq_res, 1, task))
3760 return;
5138fde0 3761 rpc_call_start(task);
faf5f49c
TM		 3762}
3763
963d8fe5 3764static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3765 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3766 .rpc_call_done = nfs4_locku_done,
06f814a3 3767 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3768};
3769
a5d16a4d
TM		 3770static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3771 struct nfs_open_context *ctx,
3772 struct nfs4_lock_state *lsp,
3773 struct nfs_seqid *seqid)
3774{
3775 struct nfs4_unlockdata *data;
5138fde0
TM		 3776 struct rpc_message msg = {
3777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3778 .rpc_cred = ctx->cred,
3779 };
c970aa85
TM		 3780 struct rpc_task_setup task_setup_data = {
3781 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3782 .rpc_message = &msg,
c970aa85 3783 .callback_ops = &nfs4_locku_ops,
101070ca 3784 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3785 .flags = RPC_TASK_ASYNC,
3786 };
a5d16a4d 3787
137d6aca
FF		 3788 /* Ensure this is an unlock - when canceling a lock, the
3789 * canceled lock is passed in, and it won't be an unlock.
3790 */
3791 fl->fl_type = F_UNLCK;
3792
a5d16a4d
TM		 3793 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3794 if (data == NULL) {
3795 nfs_free_seqid(seqid);
3796 return ERR_PTR(-ENOMEM);
3797 }
3798
5138fde0
TM		 3799 msg.rpc_argp = &data->arg,
3800 msg.rpc_resp = &data->res,
c970aa85
TM		 3801 task_setup_data.callback_data = data;
3802 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3803}
3804
faf5f49c
TM		 3805static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3806{
19e03c57 3807 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3808 struct nfs_seqid *seqid;
1da177e4 3809 struct nfs4_lock_state *lsp;
06f814a3
TM		 3810 struct rpc_task *task;
3811 int status = 0;
536ff0f8 3812 unsigned char fl_flags = request->fl_flags;
faf5f49c 3813
8d0a8a9d 3814 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3815 /* Unlock _before_ we do the RPC call */
3816 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3817 down_read(&nfsi->rwsem);
3818 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3819 up_read(&nfsi->rwsem);
9b073574 3820 goto out;
19e03c57
TM		 3821 }
3822 up_read(&nfsi->rwsem);
8d0a8a9d 3823 if (status != 0)
9b073574
TM		 3824 goto out;
3825 /* Is this a delegated lock? */
3826 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3827 goto out;
8d0a8a9d 3828 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3829 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3830 status = -ENOMEM;
911d1aaf 3831 if (seqid == NULL)
9b073574 3832 goto out;
cd3758e3 3833 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3834 status = PTR_ERR(task);
3835 if (IS_ERR(task))
9b073574 3836 goto out;
a5d16a4d 3837 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3838 rpc_put_task(task);
9b073574 3839out:
536ff0f8 3840 request->fl_flags = fl_flags;
1da177e4
LT		 3841 return status;
3842}
3843
a5d16a4d
TM		 3844struct nfs4_lockdata {
3845 struct nfs_lock_args arg;
3846 struct nfs_lock_res res;
3847 struct nfs4_lock_state *lsp;
3848 struct nfs_open_context *ctx;
3849 struct file_lock fl;
26e976a8 3850 unsigned long timestamp;
a5d16a4d
TM		 3851 int rpc_status;
3852 int cancelled;
66179efe 3853 struct nfs_server *server;
a5d16a4d
TM		 3854};
3855
3856static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3857 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3858{
a5d16a4d
TM		 3859 struct nfs4_lockdata *p;
3860 struct inode *inode = lsp->ls_state->inode;
1da177e4 3861 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3862
3863 p = kzalloc(sizeof(*p), GFP_KERNEL);
3864 if (p == NULL)
3865 return NULL;
3866
3867 p->arg.fh = NFS_FH(inode);
3868 p->arg.fl = &p->fl;
2f74c0a0
TM		 3869 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3870 if (p->arg.open_seqid == NULL)
3871 goto out_free;
a5d16a4d
TM		 3872 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3873 if (p->arg.lock_seqid == NULL)
2f74c0a0 3874 goto out_free_seqid;
a5d16a4d 3875 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3876 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3877 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3878 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3879 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3880 p->lsp = lsp;
66179efe 3881 p->server = server;
a5d16a4d
TM		 3882 atomic_inc(&lsp->ls_count);
3883 p->ctx = get_nfs_open_context(ctx);
3884 memcpy(&p->fl, fl, sizeof(p->fl));
3885 return p;
2f74c0a0
TM		 3886out_free_seqid:
3887 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3888out_free:
3889 kfree(p);
3890 return NULL;
3891}
3892
3893static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3894{
3895 struct nfs4_lockdata *data = calldata;
3896 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3897
3110ff80 3898 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3899 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3900 return;
a5d16a4d
TM		 3901 /* Do we need to do an open_to_lock_owner? */
3902 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3903 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3904 return;
a5d16a4d
TM		 3905 data->arg.open_stateid = &state->stateid;
3906 data->arg.new_lock_owner = 1;
c1d51931 3907 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3908 } else
3909 data->arg.new_lock_owner = 0;
26e976a8 3910 data->timestamp = jiffies;
66179efe
AA		 3911 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3912 &data->res.seq_res, 1, task))
3913 return;
5138fde0 3914 rpc_call_start(task);
3110ff80 3915 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3916}
3917
3918static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3919{
3920 struct nfs4_lockdata *data = calldata;
3921
3110ff80 3922 dprintk("%s: begin!\n", __func__);
a5d16a4d 3923
d61e612a
TM		 3924 nfs4_sequence_done(data->server, &data->res.seq_res,
3925 task->tk_status);
66179efe 3926
a5d16a4d
TM		 3927 data->rpc_status = task->tk_status;
3928 if (RPC_ASSASSINATED(task))
3929 goto out;
3930 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3931 if (data->rpc_status == 0)
3932 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3933 else
3934 goto out;
3935 }
3936 if (data->rpc_status == 0) {
3937 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3938 sizeof(data->lsp->ls_stateid.data));
3939 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3940 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3941 }
a5d16a4d 3942out:
3110ff80 3943 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3944}
3945
3946static void nfs4_lock_release(void *calldata)
3947{
3948 struct nfs4_lockdata *data = calldata;
3949
3110ff80 3950 dprintk("%s: begin!\n", __func__);
2f74c0a0 3951 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3952 if (data->cancelled != 0) {
3953 struct rpc_task *task;
3954 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3955 data->arg.lock_seqid);
3956 if (!IS_ERR(task))
e6b3c4db 3957 rpc_put_task(task);
3110ff80 3958 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3959 } else
3960 nfs_free_seqid(data->arg.lock_seqid);
3961 nfs4_put_lock_state(data->lsp);
3962 put_nfs_open_context(data->ctx);
3963 kfree(data);
3110ff80 3964 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3965}
3966
3967static const struct rpc_call_ops nfs4_lock_ops = {
3968 .rpc_call_prepare = nfs4_lock_prepare,
3969 .rpc_call_done = nfs4_lock_done,
3970 .rpc_release = nfs4_lock_release,
3971};
3972
3973static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3974{
3975 struct nfs4_lockdata *data;
3976 struct rpc_task *task;
5138fde0
TM		 3977 struct rpc_message msg = {
3978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3979 .rpc_cred = state->owner->so_cred,
3980 };
c970aa85
TM		 3981 struct rpc_task_setup task_setup_data = {
3982 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3983 .rpc_message = &msg,
c970aa85 3984 .callback_ops = &nfs4_lock_ops,
101070ca 3985 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3986 .flags = RPC_TASK_ASYNC,
3987 };
a5d16a4d
TM		 3988 int ret;
3989
3110ff80 3990 dprintk("%s: begin!\n", __func__);
cd3758e3 3991 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3992 fl->fl_u.nfs4_fl.owner);
3993 if (data == NULL)
3994 return -ENOMEM;
3995 if (IS_SETLKW(cmd))
3996 data->arg.block = 1;
3997 if (reclaim != 0)
3998 data->arg.reclaim = 1;
5138fde0
TM		 3999 msg.rpc_argp = &data->arg,
4000 msg.rpc_resp = &data->res,
c970aa85
TM		 4001 task_setup_data.callback_data = data;
4002 task = rpc_run_task(&task_setup_data);
7a1218a2 4003 if (IS_ERR(task))
a5d16a4d 4004 return PTR_ERR(task);
a5d16a4d
TM		 4005 ret = nfs4_wait_for_completion_rpc_task(task);
4006 if (ret == 0) {
4007 ret = data->rpc_status;
a5d16a4d
TM		 4008 } else
4009 data->cancelled = 1;
e6b3c4db 4010 rpc_put_task(task);
3110ff80 4011 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4012 return ret;
1da177e4
LT		 4013}
4014
4015static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4016{
202b50dc
TM		 4017 struct nfs_server *server = NFS_SERVER(state->inode);
4018 struct nfs4_exception exception = { };
4019 int err;
4020
4021 do {
42a2d13e
TM		 4022 /* Cache the lock if possible... */
4023 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4024 return 0;
202b50dc
TM		 4025 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4026 if (err != -NFS4ERR_DELAY)
4027 break;
4028 nfs4_handle_exception(server, err, &exception);
4029 } while (exception.retry);
4030 return err;
1da177e4
LT		 4031}
4032
4033static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4034{
202b50dc
TM		 4035 struct nfs_server *server = NFS_SERVER(state->inode);
4036 struct nfs4_exception exception = { };
4037 int err;
4038
6bfc93ef
TM		 4039 err = nfs4_set_lock_state(state, request);
4040 if (err != 0)
4041 return err;
202b50dc 4042 do {
42a2d13e
TM		 4043 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4044 return 0;
202b50dc 4045 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
a9ed2e25
TM		 4046 switch (err) {
4047 default:
4048 goto out;
4049 case -NFS4ERR_GRACE:
4050 case -NFS4ERR_DELAY:
4051 nfs4_handle_exception(server, err, &exception);
4052 err = 0;
4053 }
202b50dc 4054 } while (exception.retry);
a9ed2e25 4055out:
202b50dc 4056 return err;
1da177e4
LT		 4057}
4058
4059static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4060{
19e03c57 4061 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4062 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4063 int status;
4064
6bfc93ef 4065 /* Is this a delegated open? */
6bfc93ef
TM		 4066 status = nfs4_set_lock_state(state, request);
4067 if (status != 0)
4068 goto out;
01c3b861
TM		 4069 request->fl_flags |= FL_ACCESS;
4070 status = do_vfs_lock(request->fl_file, request);
4071 if (status < 0)
4072 goto out;
19e03c57 4073 down_read(&nfsi->rwsem);
01c3b861 4074 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4075 /* Yes: cache locks! */
01c3b861 4076 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4077 request->fl_flags = fl_flags & ~FL_SLEEP;
4078 status = do_vfs_lock(request->fl_file, request);
4079 goto out_unlock;
01c3b861 4080 }
6bfc93ef
TM		 4081 status = _nfs4_do_setlk(state, cmd, request, 0);
4082 if (status != 0)
01c3b861 4083 goto out_unlock;
6bfc93ef 4084 /* Note: we always want to sleep here! */
01c3b861 4085 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4086 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4087 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4088out_unlock:
19e03c57 4089 up_read(&nfsi->rwsem);
01c3b861
TM		 4090out:
4091 request->fl_flags = fl_flags;
1da177e4
LT		 4092 return status;
4093}
4094
4095static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4096{
4097 struct nfs4_exception exception = { };
4098 int err;
4099
4100 do {
965b5d67
TM		 4101 err = _nfs4_proc_setlk(state, cmd, request);
4102 if (err == -NFS4ERR_DENIED)
4103 err = -EAGAIN;
1da177e4 4104 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4105 err, &exception);
1da177e4
LT		 4106 } while (exception.retry);
4107 return err;
4108}
4109
4110static int
4111nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4112{
4113 struct nfs_open_context *ctx;
4114 struct nfs4_state *state;
4115 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4116 int status;
4117
4118 /* verify open state */
cd3758e3 4119 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4120 state = ctx->state;
4121
4122 if (request->fl_start < 0 || request->fl_end < 0)
4123 return -EINVAL;
4124
d953126a
TM		 4125 if (IS_GETLK(cmd)) {
4126 if (state != NULL)
4127 return nfs4_proc_getlk(state, F_GETLK, request);
4128 return 0;
4129 }
1da177e4
LT		 4130
4131 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4132 return -EINVAL;
4133
d953126a
TM		 4134 if (request->fl_type == F_UNLCK) {
4135 if (state != NULL)
4136 return nfs4_proc_unlck(state, cmd, request);
4137 return 0;
4138 }
1da177e4 4139
d953126a
TM		 4140 if (state == NULL)
4141 return -ENOLCK;
1da177e4
LT		 4142 do {
4143 status = nfs4_proc_setlk(state, cmd, request);
4144 if ((status != -EAGAIN) || IS_SETLK(cmd))
4145 break;
4146 timeout = nfs4_set_lock_task_retry(timeout);
4147 status = -ERESTARTSYS;
4148 if (signalled())
4149 break;
4150 } while(status < 0);
1da177e4
LT		 4151 return status;
4152}
4153
888e694c
TM		 4154int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4155{
4156 struct nfs_server *server = NFS_SERVER(state->inode);
4157 struct nfs4_exception exception = { };
4158 int err;
4159
4160 err = nfs4_set_lock_state(state, fl);
4161 if (err != 0)
4162 goto out;
4163 do {
4164 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4165 switch (err) {
4166 default:
4167 printk(KERN_ERR "%s: unhandled error %d.\n",
4168 __func__, err);
4169 case 0:
965b5d67 4170 case -ESTALE:
d5122201
TM		 4171 goto out;
4172 case -NFS4ERR_EXPIRED:
4173 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4174 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4175 nfs4_schedule_state_recovery(server->nfs_client);
4176 goto out;
965b5d67
TM		 4177 case -ERESTARTSYS:
4178 /*
4179 * The show must go on: exit, but mark the
4180 * stateid as needing recovery.
4181 */
4182 case -NFS4ERR_ADMIN_REVOKED:
4183 case -NFS4ERR_BAD_STATEID:
4184 case -NFS4ERR_OPENMODE:
4185 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4186 err = 0;
4187 goto out;
4188 case -ENOMEM:
4189 case -NFS4ERR_DENIED:
4190 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4191 err = 0;
4192 goto out;
d5122201
TM		 4193 case -NFS4ERR_DELAY:
4194 break;
4195 }
888e694c
TM		 4196 err = nfs4_handle_exception(server, err, &exception);
4197 } while (exception.retry);
4198out:
4199 return err;
4200}
6b3b5496 4201
aa1870af
BF		 4202#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4203
6b3b5496
BF		 4204int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4205 size_t buflen, int flags)
4206{
4b580ee3
BF		 4207 struct inode *inode = dentry->d_inode;
4208
4209 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4210 return -EOPNOTSUPP;
4211
4b580ee3 4212 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4213}
4214
4215/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4216 * and that's what we'll do for e.g. user attributes that haven't been set.
4217 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4218 * attributes in kernel-managed attribute namespaces. */
4219ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4220 size_t buflen)
4221{
aa1870af
BF		 4222 struct inode *inode = dentry->d_inode;
4223
4224 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4225 return -EOPNOTSUPP;
4226
4227 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4228}
4229
4230ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4231{
aa1870af 4232 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4233
096455a2
BF		 4234 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4235 return 0;
6b3b5496
BF		 4236 if (buf && buflen < len)
4237 return -ERANGE;
4238 if (buf)
aa1870af
BF		 4239 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4240 return len;
6b3b5496
BF		 4241}
4242
69aaaae1
TM		 4243static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4244{
4245 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4246 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4247 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4248 return;
4249
4250 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4251 NFS_ATTR_FATTR_NLINK;
4252 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4253 fattr->nlink = 2;
4254}
4255
56659e99 4256int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4257 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4258{
4259 struct nfs_server *server = NFS_SERVER(dir);
4260 u32 bitmask[2] = {
361e624f
MN		 4261 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4262 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4263 };
4264 struct nfs4_fs_locations_arg args = {
4265 .dir_fh = NFS_FH(dir),
c228fd3a 4266 .name = name,
683b57b4
TM		 4267 .page = page,
4268 .bitmask = bitmask,
4269 };
22958463
BH		 4270 struct nfs4_fs_locations_res res = {
4271 .fs_locations = fs_locations,
4272 };
683b57b4
TM		 4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4275 .rpc_argp = &args,
22958463 4276 .rpc_resp = &res,
683b57b4
TM		 4277 };
4278 int status;
4279
3110ff80 4280 dprintk("%s: start\n", __func__);
c228fd3a 4281 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4282 fs_locations->server = server;
830b8e33 4283 fs_locations->nlocations = 0;
cccef3b9 4284 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4285 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4286 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4287 return status;
4288}
4289
557134a3 4290#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4291/*
4292 * nfs4_proc_exchange_id()
4293 *
4294 * Since the clientid has expired, all compounds using sessions
4295 * associated with the stale clientid will be returning
4296 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4297 * be in some phase of session reset.
4298 */
4d643d1d 4299int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4300{
4301 nfs4_verifier verifier;
4302 struct nfs41_exchange_id_args args = {
4303 .client = clp,
4304 .flags = clp->cl_exchange_flags,
4305 };
4306 struct nfs41_exchange_id_res res = {
4307 .client = clp,
4308 };
4309 int status;
4310 struct rpc_message msg = {
4311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4312 .rpc_argp = &args,
4313 .rpc_resp = &res,
4314 .rpc_cred = cred,
4315 };
4316 __be32 *p;
4317
4318 dprintk("--> %s\n", __func__);
4319 BUG_ON(clp == NULL);
a7b72103 4320
7b183d0d
AB		 4321 /* Remove server-only flags */
4322 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4323
99fe60d0
BH		 4324 p = (u32 *)verifier.data;
4325 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4326 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4327 args.verifier = &verifier;
4328
4329 while (1) {
4330 args.id_len = scnprintf(args.id, sizeof(args.id),
4331 "%s/%s %u",
4332 clp->cl_ipaddr,
4333 rpc_peeraddr2str(clp->cl_rpcclient,
4334 RPC_DISPLAY_ADDR),
4335 clp->cl_id_uniquifier);
4336
4337 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4338
4339 if (status != NFS4ERR_CLID_INUSE)
4340 break;
4341
4342 if (signalled())
4343 break;
4344
4345 if (++clp->cl_id_uniquifier == 0)
4346 break;
4347 }
4348
4349 dprintk("<-- %s status= %d\n", __func__, status);
4350 return status;
4351}
4352
2050f0cc
AA		 4353struct nfs4_get_lease_time_data {
4354 struct nfs4_get_lease_time_args *args;
4355 struct nfs4_get_lease_time_res *res;
4356 struct nfs_client *clp;
4357};
4358
4359static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4360 void *calldata)
4361{
4362 int ret;
4363 struct nfs4_get_lease_time_data *data =
4364 (struct nfs4_get_lease_time_data *)calldata;
4365
4366 dprintk("--> %s\n", __func__);
4367 /* just setup sequence, do not trigger session recovery
4368 since we're invoked within one */
4369 ret = nfs41_setup_sequence(data->clp->cl_session,
4370 &data->args->la_seq_args,
4371 &data->res->lr_seq_res, 0, task);
4372
4373 BUG_ON(ret == -EAGAIN);
4374 rpc_call_start(task);
4375 dprintk("<-- %s\n", __func__);
4376}
4377
4378/*
4379 * Called from nfs4_state_manager thread for session setup, so don't recover
4380 * from sequence operation or clientid errors.
4381 */
4382static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4383{
4384 struct nfs4_get_lease_time_data *data =
4385 (struct nfs4_get_lease_time_data *)calldata;
4386
4387 dprintk("--> %s\n", __func__);
4388 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4389 switch (task->tk_status) {
4390 case -NFS4ERR_DELAY:
4391 case -NFS4ERR_GRACE:
4392 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4393 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4394 task->tk_status = 0;
d61e612a 4395 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4396 return;
4397 }
2050f0cc
AA		 4398 dprintk("<-- %s\n", __func__);
4399}
4400
4401struct rpc_call_ops nfs4_get_lease_time_ops = {
4402 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4403 .rpc_call_done = nfs4_get_lease_time_done,
4404};
4405
4406int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4407{
4408 struct rpc_task *task;
4409 struct nfs4_get_lease_time_args args;
4410 struct nfs4_get_lease_time_res res = {
4411 .lr_fsinfo = fsinfo,
4412 };
4413 struct nfs4_get_lease_time_data data = {
4414 .args = &args,
4415 .res = &res,
4416 .clp = clp,
4417 };
4418 struct rpc_message msg = {
4419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4420 .rpc_argp = &args,
4421 .rpc_resp = &res,
4422 };
4423 struct rpc_task_setup task_setup = {
4424 .rpc_client = clp->cl_rpcclient,
4425 .rpc_message = &msg,
4426 .callback_ops = &nfs4_get_lease_time_ops,
4427 .callback_data = &data
4428 };
4429 int status;
4430
4431 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4432 dprintk("--> %s\n", __func__);
4433 task = rpc_run_task(&task_setup);
4434
4435 if (IS_ERR(task))
4436 status = PTR_ERR(task);
4437 else {
4438 status = task->tk_status;
4439 rpc_put_task(task);
4440 }
4441 dprintk("<-- %s return %d\n", __func__, status);
4442
4443 return status;
4444}
4445
b73dafa7
RL		 4446/*
4447 * Reset a slot table
4448 */
4449static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4450 int old_max_slots, int ivalue)
ac72b7b3 4451{
b73dafa7 4452 int i;
ac72b7b3
AA		 4453 int ret = 0;
4454
b73dafa7 4455 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4456
b73dafa7
RL		 4457 /*
4458 * Until we have dynamic slot table adjustment, insist
4459 * upon the same slot table size
4460 */
ac72b7b3
AA		 4461 if (max_slots != old_max_slots) {
4462 dprintk("%s reset slot table does't match old\n",
4463 __func__);
4464 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4465 goto out;
4466 }
4467 spin_lock(&tbl->slot_tbl_lock);
4468 for (i = 0; i < max_slots; ++i)
b73dafa7 4469 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4470 spin_unlock(&tbl->slot_tbl_lock);
4471 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4472 tbl, tbl->slots, tbl->max_slots);
4473out:
4474 dprintk("<-- %s: return %d\n", __func__, ret);
4475 return ret;
4476}
4477
b73dafa7
RL		 4478/*
4479 * Reset the forechannel and backchannel slot tables
4480 */
4481static int nfs4_reset_slot_tables(struct nfs4_session *session)
4482{
4483 int status;
4484
4485 status = nfs4_reset_slot_table(&session->fc_slot_table,
4486 session->fc_attrs.max_reqs,
4487 session->fc_slot_table.max_slots,
4488 1);
f8625a6a
RL		 4489 if (status)
4490 return status;
4491
4492 status = nfs4_reset_slot_table(&session->bc_slot_table,
4493 session->bc_attrs.max_reqs,
4494 session->bc_slot_table.max_slots,
4495 0);
b73dafa7
RL		 4496 return status;
4497}
4498
f8625a6a
RL		 4499/* Destroy the slot table */
4500static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4501{
4502 if (session->fc_slot_table.slots != NULL) {
4503 kfree(session->fc_slot_table.slots);
4504 session->fc_slot_table.slots = NULL;
4505 }
4506 if (session->bc_slot_table.slots != NULL) {
4507 kfree(session->bc_slot_table.slots);
4508 session->bc_slot_table.slots = NULL;
4509 }
4510 return;
4511}
4512
fc931582
AA		 4513/*
4514 * Initialize slot table
4515 */
050047ce
RL		 4516static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4517 int max_slots, int ivalue)
fc931582 4518{
fc931582
AA		 4519 struct nfs4_slot *slot;
4520 int ret = -ENOMEM;
4521
4522 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4523
050047ce 4524 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4525
4526 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4527 if (!slot)
4528 goto out;
fc931582
AA		 4529 ret = 0;
4530
4531 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4532 tbl->max_slots = max_slots;
4533 tbl->slots = slot;
4534 tbl->highest_used_slotid = -1; /* no slot is currently used */
4535 spin_unlock(&tbl->slot_tbl_lock);
4536 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4537 tbl, tbl->slots, tbl->max_slots);
4538out:
4539 dprintk("<-- %s: return %d\n", __func__, ret);
4540 return ret;
fc931582
AA		 4541}
4542
050047ce
RL		 4543/*
4544 * Initialize the forechannel and backchannel tables
4545 */
4546static int nfs4_init_slot_tables(struct nfs4_session *session)
4547{
f26468fb
TM		 4548 struct nfs4_slot_table *tbl;
4549 int status = 0;
050047ce 4550
f26468fb
TM		 4551 tbl = &session->fc_slot_table;
4552 if (tbl->slots == NULL) {
4553 status = nfs4_init_slot_table(tbl,
4554 session->fc_attrs.max_reqs, 1);
4555 if (status)
4556 return status;
4557 }
050047ce 4558
f26468fb
TM		 4559 tbl = &session->bc_slot_table;
4560 if (tbl->slots == NULL) {
4561 status = nfs4_init_slot_table(tbl,
4562 session->bc_attrs.max_reqs, 0);
4563 if (status)
4564 nfs4_destroy_slot_tables(session);
4565 }
f8625a6a
RL		 4566
4567 return status;
557134a3
AA		 4568}
4569
4570struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4571{
4572 struct nfs4_session *session;
4573 struct nfs4_slot_table *tbl;
4574
4575 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4576 if (!session)
4577 return NULL;
76db6d95 4578
76db6d95
AA		 4579 /*
4580 * The create session reply races with the server back
4581 * channel probe. Mark the client NFS_CS_SESSION_INITING
4582 * so that the client back channel can find the
4583 * nfs_client struct
4584 */
4585 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4586 init_completion(&session->complete);
76db6d95 4587
557134a3
AA		 4588 tbl = &session->fc_slot_table;
4589 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4590 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4591
4592 tbl = &session->bc_slot_table;
4593 spin_lock_init(&tbl->slot_tbl_lock);
4594 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4595
557134a3
AA		 4596 session->clp = clp;
4597 return session;
4598}
4599
4600void nfs4_destroy_session(struct nfs4_session *session)
4601{
5a0ffe54
AA		 4602 nfs4_proc_destroy_session(session);
4603 dprintk("%s Destroy backchannel for xprt %p\n",
4604 __func__, session->clp->cl_rpcclient->cl_xprt);
4605 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4606 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4607 nfs4_destroy_slot_tables(session);
557134a3
AA		 4608 kfree(session);
4609}
4610
fc931582
AA		 4611/*
4612 * Initialize the values to be used by the client in CREATE_SESSION
4613 * If nfs4_init_session set the fore channel request and response sizes,
4614 * use them.
4615 *
4616 * Set the back channel max_resp_sz_cached to zero to force the client to
4617 * always set csa_cachethis to FALSE because the current implementation
4618 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4619 */
4620static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4621{
4622 struct nfs4_session *session = args->client->cl_session;
4623 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4624 mxresp_sz = session->fc_attrs.max_resp_sz;
4625
4626 if (mxrqst_sz == 0)
4627 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4628 if (mxresp_sz == 0)
4629 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4630 /* Fore channel attributes */
4631 args->fc_attrs.headerpadsz = 0;
4632 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4633 args->fc_attrs.max_resp_sz = mxresp_sz;
4634 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4635 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4636 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4637
4638 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4639 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4640 __func__,
4641 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4642 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4643 args->fc_attrs.max_reqs);
4644
4645 /* Back channel attributes */
4646 args->bc_attrs.headerpadsz = 0;
4647 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4648 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4649 args->bc_attrs.max_resp_sz_cached = 0;
4650 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4651 args->bc_attrs.max_reqs = 1;
4652
4653 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4654 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4655 __func__,
4656 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4657 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4658 args->bc_attrs.max_reqs);
4659}
4660
8d35301d
AA		 4661static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4662{
4663 if (rcvd <= sent)
4664 return 0;
4665 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4666 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4667 return -EINVAL;
4668}
4669
4670#define _verify_fore_channel_attr(_name_) \
4671 _verify_channel_attr("fore", #_name_, \
4672 args->fc_attrs._name_, \
4673 session->fc_attrs._name_)
4674
4675#define _verify_back_channel_attr(_name_) \
4676 _verify_channel_attr("back", #_name_, \
4677 args->bc_attrs._name_, \
4678 session->bc_attrs._name_)
4679
4680/*
4681 * The server is not allowed to increase the fore channel header pad size,
4682 * maximum response size, or maximum number of operations.
4683 *
4684 * The back channel attributes are only negotiatied down: We send what the
4685 * (back channel) server insists upon.
4686 */
4687static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4688 struct nfs4_session *session)
4689{
4690 int ret = 0;
4691
4692 ret |= _verify_fore_channel_attr(headerpadsz);
4693 ret |= _verify_fore_channel_attr(max_resp_sz);
4694 ret |= _verify_fore_channel_attr(max_ops);
4695
4696 ret |= _verify_back_channel_attr(headerpadsz);
4697 ret |= _verify_back_channel_attr(max_rqst_sz);
4698 ret |= _verify_back_channel_attr(max_resp_sz);
4699 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4700 ret |= _verify_back_channel_attr(max_ops);
4701 ret |= _verify_back_channel_attr(max_reqs);
4702
4703 return ret;
4704}
4705
fc931582
AA		 4706static int _nfs4_proc_create_session(struct nfs_client *clp)
4707{
4708 struct nfs4_session *session = clp->cl_session;
4709 struct nfs41_create_session_args args = {
4710 .client = clp,
4711 .cb_program = NFS4_CALLBACK,
4712 };
4713 struct nfs41_create_session_res res = {
4714 .client = clp,
4715 };
4716 struct rpc_message msg = {
4717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4718 .rpc_argp = &args,
4719 .rpc_resp = &res,
4720 };
4721 int status;
4722
4723 nfs4_init_channel_attrs(&args);
0f91421e 4724 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4725
4726 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4727
8d35301d
AA		 4728 if (!status)
4729 /* Verify the session's negotiated channel_attrs values */
4730 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4731 if (!status) {
4732 /* Increment the clientid slot sequence id */
4733 clp->cl_seqid++;
4734 }
4735
4736 return status;
4737}
4738
4739/*
4740 * Issues a CREATE_SESSION operation to the server.
4741 * It is the responsibility of the caller to verify the session is
4742 * expired before calling this routine.
4743 */
f26468fb 4744int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4745{
4746 int status;
4747 unsigned *ptr;
fc931582
AA		 4748 struct nfs4_session *session = clp->cl_session;
4749
4750 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4751
4752 status = _nfs4_proc_create_session(clp);
4753 if (status)
4754 goto out;
4755
f26468fb
TM		 4756 /* Init and reset the fore channel */
4757 status = nfs4_init_slot_tables(session);
4758 dprintk("slot table initialization returned %d\n", status);
4759 if (status)
4760 goto out;
4761 status = nfs4_reset_slot_tables(session);
4762 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4763 if (status)
4764 goto out;
4765
4766 ptr = (unsigned *)&session->sess_id.data[0];
4767 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4768 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4769out:
4770 dprintk("<-- %s\n", __func__);
4771 return status;
4772}
4773
0f3e66c6
AA		 4774/*
4775 * Issue the over-the-wire RPC DESTROY_SESSION.
4776 * The caller must serialize access to this routine.
4777 */
4778int nfs4_proc_destroy_session(struct nfs4_session *session)
4779{
4780 int status = 0;
4781 struct rpc_message msg;
4782
4783 dprintk("--> nfs4_proc_destroy_session\n");
4784
4785 /* session is still being setup */
4786 if (session->clp->cl_cons_state != NFS_CS_READY)
4787 return status;
4788
4789 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4790 msg.rpc_argp = session;
4791 msg.rpc_resp = NULL;
4792 msg.rpc_cred = NULL;
4793 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4794
4795 if (status)
4796 printk(KERN_WARNING
4797 "Got error %d from the server on DESTROY_SESSION. "
4798 "Session has been destroyed regardless...\n", status);
4799
4800 dprintk("<-- nfs4_proc_destroy_session\n");
4801 return status;
4802}
4803
fccba804
TM		 4804int nfs4_init_session(struct nfs_server *server)
4805{
4806 struct nfs_client *clp = server->nfs_client;
2449ea2e 4807 struct nfs4_session *session;
fccba804
TM		 4808 int ret;
4809
4810 if (!nfs4_has_session(clp))
4811 return 0;
4812
2449ea2e
AB		 4813 session = clp->cl_session;
4814 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4815 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4816
fccba804
TM		 4817 ret = nfs4_recover_expired_lease(server);
4818 if (!ret)
4819 ret = nfs4_check_client_ready(clp);
4820 return ret;
4821}
4822
fc01cea9
AA		 4823/*
4824 * Renew the cl_session lease.
4825 */
4826static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4827{
4828 struct nfs4_sequence_args args;
4829 struct nfs4_sequence_res res;
4830
4831 struct rpc_message msg = {
4832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4833 .rpc_argp = &args,
4834 .rpc_resp = &res,
4835 .rpc_cred = cred,
4836 };
4837
4838 args.sa_cache_this = 0;
4839
4840 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4841 &res, 0);
4842}
4843
4844void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4845{
4846 struct nfs_client *clp = (struct nfs_client *)data;
4847
4848 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4849
4850 if (task->tk_status < 0) {
4851 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4852
4853 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4854 == -EAGAIN) {
d61e612a 4855 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4856 return;
4857 }
4858 }
fc01cea9
AA		 4859 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4860
fc01cea9
AA		 4861 kfree(task->tk_msg.rpc_argp);
4862 kfree(task->tk_msg.rpc_resp);
4863
4864 dprintk("<-- %s\n", __func__);
4865}
4866
4867static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4868{
4869 struct nfs_client *clp;
4870 struct nfs4_sequence_args *args;
4871 struct nfs4_sequence_res *res;
4872
4873 clp = (struct nfs_client *)data;
4874 args = task->tk_msg.rpc_argp;
4875 res = task->tk_msg.rpc_resp;
4876
4877 if (nfs4_setup_sequence(clp, args, res, 0, task))
4878 return;
4879 rpc_call_start(task);
4880}
4881
4882static const struct rpc_call_ops nfs41_sequence_ops = {
4883 .rpc_call_done = nfs41_sequence_call_done,
4884 .rpc_call_prepare = nfs41_sequence_prepare,
4885};
4886
4887static int nfs41_proc_async_sequence(struct nfs_client *clp,
4888 struct rpc_cred *cred)
4889{
4890 struct nfs4_sequence_args *args;
4891 struct nfs4_sequence_res *res;
4892 struct rpc_message msg = {
4893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4894 .rpc_cred = cred,
4895 };
4896
4897 args = kzalloc(sizeof(*args), GFP_KERNEL);
4898 if (!args)
4899 return -ENOMEM;
4900 res = kzalloc(sizeof(*res), GFP_KERNEL);
4901 if (!res) {
4902 kfree(args);
4903 return -ENOMEM;
4904 }
4905 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4906 msg.rpc_argp = args;
4907 msg.rpc_resp = res;
4908
4909 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4910 &nfs41_sequence_ops, (void *)clp);
4911}
4912
fce5c838
RL		 4913struct nfs4_reclaim_complete_data {
4914 struct nfs_client *clp;
4915 struct nfs41_reclaim_complete_args arg;
4916 struct nfs41_reclaim_complete_res res;
4917};
4918
4919static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4920{
4921 struct nfs4_reclaim_complete_data *calldata = data;
4922
4923 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4924 &calldata->res.seq_res, 0, task))
4925 return;
4926
4927 rpc_call_start(task);
4928}
4929
4930static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4931{
4932 struct nfs4_reclaim_complete_data *calldata = data;
4933 struct nfs_client *clp = calldata->clp;
4934 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4935
4936 dprintk("--> %s\n", __func__);
4937 nfs41_sequence_done(clp, res, task->tk_status);
4938 switch (task->tk_status) {
4939 case 0:
4940 case -NFS4ERR_COMPLETE_ALREADY:
4941 break;
4942 case -NFS4ERR_BADSESSION:
4943 case -NFS4ERR_DEADSESSION:
4944 /*
4945 * Handle the session error, but do not retry the operation, as
4946 * we have no way of telling whether the clientid had to be
4947 * reset before we got our reply. If reset, a new wave of
4948 * reclaim operations will follow, containing their own reclaim
4949 * complete. We don't want our retry to get on the way of
4950 * recovery by incorrectly indicating to the server that we're
4951 * done reclaiming state since the process had to be restarted.
4952 */
4953 _nfs4_async_handle_error(task, NULL, clp, NULL);
4954 break;
4955 default:
4956 if (_nfs4_async_handle_error(
4957 task, NULL, clp, NULL) == -EAGAIN) {
4958 rpc_restart_call_prepare(task);
4959 return;
4960 }
4961 }
fce5c838
RL		 4962
4963 dprintk("<-- %s\n", __func__);
4964}
4965
4966static void nfs4_free_reclaim_complete_data(void *data)
4967{
4968 struct nfs4_reclaim_complete_data *calldata = data;
4969
4970 kfree(calldata);
4971}
4972
4973static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4974 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4975 .rpc_call_done = nfs4_reclaim_complete_done,
4976 .rpc_release = nfs4_free_reclaim_complete_data,
4977};
4978
4979/*
4980 * Issue a global reclaim complete.
4981 */
4982static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4983{
4984 struct nfs4_reclaim_complete_data *calldata;
4985 struct rpc_task *task;
4986 struct rpc_message msg = {
4987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
4988 };
4989 struct rpc_task_setup task_setup_data = {
4990 .rpc_client = clp->cl_rpcclient,
4991 .rpc_message = &msg,
4992 .callback_ops = &nfs4_reclaim_complete_call_ops,
4993 .flags = RPC_TASK_ASYNC,
4994 };
4995 int status = -ENOMEM;
4996
4997 dprintk("--> %s\n", __func__);
4998 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
4999 if (calldata == NULL)
5000 goto out;
5001 calldata->clp = clp;
5002 calldata->arg.one_fs = 0;
5003 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5004
5005 msg.rpc_argp = &calldata->arg;
5006 msg.rpc_resp = &calldata->res;
5007 task_setup_data.callback_data = calldata;
5008 task = rpc_run_task(&task_setup_data);
5009 if (IS_ERR(task))
5010 status = PTR_ERR(task);
5011 rpc_put_task(task);
5012out:
5013 dprintk("<-- %s status=%d\n", __func__, status);
5014 return status;
5015}
557134a3
AA		 5016#endif /* CONFIG_NFS_V4_1 */
5017
591d71cb 5018struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5019 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5020 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5021 .recover_open = nfs4_open_reclaim,
5022 .recover_lock = nfs4_lock_reclaim,
591d71cb 5023 .establish_clid = nfs4_init_clientid,
90a16617 5024 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5025};
5026
591d71cb
AA		 5027#if defined(CONFIG_NFS_V4_1)
5028struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5029 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5030 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5031 .recover_open = nfs4_open_reclaim,
5032 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5033 .establish_clid = nfs41_init_clientid,
b4b82607 5034 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5035 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5036};
5037#endif /* CONFIG_NFS_V4_1 */
5038
5039struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5040 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5041 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5042 .recover_open = nfs4_open_expired,
5043 .recover_lock = nfs4_lock_expired,
5044 .establish_clid = nfs4_init_clientid,
90a16617 5045 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5046};
5047
5048#if defined(CONFIG_NFS_V4_1)
5049struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5050 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5051 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5052 .recover_open = nfs4_open_expired,
5053 .recover_lock = nfs4_lock_expired,
4d643d1d 5054 .establish_clid = nfs41_init_clientid,
b4b82607 5055 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5056};
591d71cb 5057#endif /* CONFIG_NFS_V4_1 */
1da177e4 5058
29fba38b
BH		 5059struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5060 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5061 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5062 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5063};
5064
5065#if defined(CONFIG_NFS_V4_1)
5066struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5067 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5068 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5069 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5070};
5071#endif
5072
5073/*
5074 * Per minor version reboot and network partition recovery ops
5075 */
5076
591d71cb
AA		 5077struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5078 &nfs40_reboot_recovery_ops,
5079#if defined(CONFIG_NFS_V4_1)
5080 &nfs41_reboot_recovery_ops,
5081#endif
5082};
5083
5084struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5085 &nfs40_nograce_recovery_ops,
5086#if defined(CONFIG_NFS_V4_1)
5087 &nfs41_nograce_recovery_ops,
5088#endif
5089};
5090
29fba38b
BH		 5091struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5092 &nfs40_state_renewal_ops,
5093#if defined(CONFIG_NFS_V4_1)
5094 &nfs41_state_renewal_ops,
5095#endif
5096};
5097
92e1d5be 5098static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5099 .permission = nfs_permission,
5100 .getattr = nfs_getattr,
5101 .setattr = nfs_setattr,
5102 .getxattr = nfs4_getxattr,
5103 .setxattr = nfs4_setxattr,
5104 .listxattr = nfs4_listxattr,
5105};
5106
509de811 5107const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5108 .version = 4, /* protocol version */
5109 .dentry_ops = &nfs4_dentry_operations,
5110 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5111 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5112 .getroot = nfs4_proc_get_root,
5113 .getattr = nfs4_proc_getattr,
5114 .setattr = nfs4_proc_setattr,
2b3de441 5115 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5116 .lookup = nfs4_proc_lookup,
5117 .access = nfs4_proc_access,
5118 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5119 .create = nfs4_proc_create,
5120 .remove = nfs4_proc_remove,
5121 .unlink_setup = nfs4_proc_unlink_setup,
5122 .unlink_done = nfs4_proc_unlink_done,
5123 .rename = nfs4_proc_rename,
5124 .link = nfs4_proc_link,
5125 .symlink = nfs4_proc_symlink,
5126 .mkdir = nfs4_proc_mkdir,
5127 .rmdir = nfs4_proc_remove,
5128 .readdir = nfs4_proc_readdir,
5129 .mknod = nfs4_proc_mknod,
5130 .statfs = nfs4_proc_statfs,
5131 .fsinfo = nfs4_proc_fsinfo,
5132 .pathconf = nfs4_proc_pathconf,
e9326dca 5133 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5134 .decode_dirent = nfs4_decode_dirent,
5135 .read_setup = nfs4_proc_read_setup,
ec06c096 5136 .read_done = nfs4_read_done,
1da177e4 5137 .write_setup = nfs4_proc_write_setup,
788e7a89 5138 .write_done = nfs4_write_done,
1da177e4 5139 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5140 .commit_done = nfs4_commit_done,
1da177e4 5141 .lock = nfs4_proc_lock,
e50a1c2e 5142 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5143 .close_context = nfs4_close_context,
1da177e4
LT		 5144};
5145
5146/*
5147 * Local variables:
5148 * c-basic-offset: 8
5149 * End:
5150 */
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