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nfs: make recovery state manager operations privileged
[mirror_ubuntu-bionic-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);
b257957e 67static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 68static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 69static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 70static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 72
1da177e4 73/* Prevent leaks of NFSv4 errors into userland */
46f72f57 74static int nfs4_map_errors(int err)
1da177e4 75{
52567b03
TM		 76 if (err >= -1000)
77 return err;
78 switch (err) {
79 case -NFS4ERR_RESOURCE:
80 return -EREMOTEIO;
81 default:
1da177e4 82 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 83 __func__, -err);
52567b03 84 break;
1da177e4 85 }
52567b03 86 return -EIO;
1da177e4
LT		 87}
88
89/*
90 * This is our standard bitmap for GETATTR requests.
91 */
92const u32 nfs4_fattr_bitmap[2] = {
93 FATTR4_WORD0_TYPE
94 | FATTR4_WORD0_CHANGE
95 | FATTR4_WORD0_SIZE
96 | FATTR4_WORD0_FSID
97 | FATTR4_WORD0_FILEID,
98 FATTR4_WORD1_MODE
99 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER
101 | FATTR4_WORD1_OWNER_GROUP
102 | FATTR4_WORD1_RAWDEV
103 | FATTR4_WORD1_SPACE_USED
104 | FATTR4_WORD1_TIME_ACCESS
105 | FATTR4_WORD1_TIME_METADATA
106 | FATTR4_WORD1_TIME_MODIFY
107};
108
109const u32 nfs4_statfs_bitmap[2] = {
110 FATTR4_WORD0_FILES_AVAIL
111 | FATTR4_WORD0_FILES_FREE
112 | FATTR4_WORD0_FILES_TOTAL,
113 FATTR4_WORD1_SPACE_AVAIL
114 | FATTR4_WORD1_SPACE_FREE
115 | FATTR4_WORD1_SPACE_TOTAL
116};
117
4ce79717 118const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 119 FATTR4_WORD0_MAXLINK
120 | FATTR4_WORD0_MAXNAME,
121 0
122};
123
124const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
125 | FATTR4_WORD0_MAXREAD
126 | FATTR4_WORD0_MAXWRITE
127 | FATTR4_WORD0_LEASE_TIME,
128 0
129};
130
830b8e33
MN		 131const u32 nfs4_fs_locations_bitmap[2] = {
132 FATTR4_WORD0_TYPE
133 | FATTR4_WORD0_CHANGE
134 | FATTR4_WORD0_SIZE
135 | FATTR4_WORD0_FSID
136 | FATTR4_WORD0_FILEID
137 | FATTR4_WORD0_FS_LOCATIONS,
138 FATTR4_WORD1_MODE
139 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER
141 | FATTR4_WORD1_OWNER_GROUP
142 | FATTR4_WORD1_RAWDEV
143 | FATTR4_WORD1_SPACE_USED
144 | FATTR4_WORD1_TIME_ACCESS
145 | FATTR4_WORD1_TIME_METADATA
146 | FATTR4_WORD1_TIME_MODIFY
147 | FATTR4_WORD1_MOUNTED_ON_FILEID
148};
149
bc4785cd 150static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 151 struct nfs4_readdir_arg *readdir)
152{
0dbb4c67 153 __be32 *start, *p;
1da177e4
LT		 154
155 BUG_ON(readdir->count < 80);
156 if (cookie > 2) {
b7ef1956 157 readdir->cookie = cookie;
1da177e4
LT		 158 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
159 return;
160 }
161
162 readdir->cookie = 0;
163 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
164 if (cookie == 2)
165 return;
166
167 /*
168 * NFSv4 servers do not return entries for '.' and '..'
169 * Therefore, we fake these entries here. We let '.'
170 * have cookie 0 and '..' have cookie 1. Note that
171 * when talking to the server, we always send cookie 0
172 * instead of 1 or 2.
173 */
0dbb4c67 174 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 175
176 if (cookie == 0) {
177 *p++ = xdr_one; /* next */
178 *p++ = xdr_zero; /* cookie, first word */
179 *p++ = xdr_one; /* cookie, second word */
180 *p++ = xdr_one; /* entry len */
181 memcpy(p, ".\0\0\0", 4); /* entry */
182 p++;
183 *p++ = xdr_one; /* bitmap length */
184 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
185 *p++ = htonl(8); /* attribute buffer length */
4e769b93 186 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 187 }
188
189 *p++ = xdr_one; /* next */
190 *p++ = xdr_zero; /* cookie, first word */
191 *p++ = xdr_two; /* cookie, second word */
192 *p++ = xdr_two; /* entry len */
193 memcpy(p, "..\0\0", 4); /* entry */
194 p++;
195 *p++ = xdr_one; /* bitmap length */
196 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
197 *p++ = htonl(8); /* attribute buffer length */
4e769b93 198 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 199
200 readdir->pgbase = (char *)p - (char *)start;
201 readdir->count -= readdir->pgbase;
202 kunmap_atomic(start, KM_USER0);
203}
204
65de872e
TM		 205static int nfs4_wait_clnt_recover(struct nfs_client *clp)
206{
207 int res;
208
209 might_sleep();
210
e005e804 211 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 212 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 213 return res;
214}
215
216static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
217{
218 int res = 0;
219
220 might_sleep();
221
222 if (*timeout <= 0)
223 *timeout = NFS4_POLL_RETRY_MIN;
224 if (*timeout > NFS4_POLL_RETRY_MAX)
225 *timeout = NFS4_POLL_RETRY_MAX;
226 schedule_timeout_killable(*timeout);
227 if (fatal_signal_pending(current))
228 res = -ERESTARTSYS;
229 *timeout <<= 1;
230 return res;
231}
232
233/* This is the error handling routine for processes that are allowed
234 * to sleep.
235 */
236static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237{
238 struct nfs_client *clp = server->nfs_client;
9e33bed5 239 struct nfs4_state *state = exception->state;
65de872e
TM		 240 int ret = errorcode;
241
242 exception->retry = 0;
243 switch(errorcode) {
244 case 0:
245 return 0;
9e33bed5
TM		 246 case -NFS4ERR_ADMIN_REVOKED:
247 case -NFS4ERR_BAD_STATEID:
248 case -NFS4ERR_OPENMODE:
249 if (state == NULL)
250 break;
251 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 252 case -NFS4ERR_STALE_CLIENTID:
253 case -NFS4ERR_STALE_STATEID:
254 case -NFS4ERR_EXPIRED:
255 nfs4_schedule_state_recovery(clp);
256 ret = nfs4_wait_clnt_recover(clp);
257 if (ret == 0)
258 exception->retry = 1;
4745e315 259#if !defined(CONFIG_NFS_V4_1)
65de872e 260 break;
4745e315
AA		 261#else /* !defined(CONFIG_NFS_V4_1) */
262 if (!nfs4_has_session(server->nfs_client))
263 break;
264 /* FALLTHROUGH */
265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
273 errorcode);
0b9e2d41 274 nfs4_schedule_state_recovery(clp);
4745e315 275 exception->retry = 1;
b9179237 276 break;
4745e315 277#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e 278 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
281 * fail
282 */
283 ret = -EBUSY;
284 break;
285 }
65de872e
TM		 286 case -NFS4ERR_GRACE:
287 case -NFS4ERR_DELAY:
288 ret = nfs4_delay(server->client, &exception->timeout);
289 if (ret != 0)
290 break;
291 case -NFS4ERR_OLD_STATEID:
292 exception->retry = 1;
293 }
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret);
296}
297
298
26e976a8 299static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 300{
7539bbab 301 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 302 spin_lock(&clp->cl_lock);
303 if (time_before(clp->cl_last_renewal,timestamp))
304 clp->cl_last_renewal = timestamp;
305 spin_unlock(&clp->cl_lock);
306}
307
cccef3b9
AA		 308#if defined(CONFIG_NFS_V4_1)
309
e2c4ab3c
AA		 310/*
311 * nfs4_free_slot - free a slot and efficiently update slot table.
312 *
313 * freeing a slot is trivially done by clearing its respective bit
314 * in the bitmap.
315 * If the freed slotid equals highest_used_slotid we want to update it
316 * so that the server would be able to size down the slot table if needed,
317 * otherwise we know that the highest_used_slotid is still in use.
318 * When updating highest_used_slotid there may be "holes" in the bitmap
319 * so we need to scan down from highest_used_slotid to 0 looking for the now
320 * highest slotid in use.
321 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 322 *
323 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 324 */
325static void
326nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
327{
328 int slotid = free_slotid;
329
e2c4ab3c
AA		 330 /* clear used bit in bitmap */
331 __clear_bit(slotid, tbl->used_slots);
332
333 /* update highest_used_slotid when it is freed */
334 if (slotid == tbl->highest_used_slotid) {
335 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 336 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 337 tbl->highest_used_slotid = slotid;
338 else
339 tbl->highest_used_slotid = -1;
340 }
e2c4ab3c
AA		 341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
342 free_slotid, tbl->highest_used_slotid);
343}
344
3bfb0fc5
AB		 345/*
346 * Signal state manager thread if session is drained
347 */
348static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
349{
689cf5c1
AB		 350 struct rpc_task *task;
351
3bfb0fc5 352 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 353 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
354 if (task)
355 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 356 return;
357 }
358
359 if (ses->fc_slot_table.highest_used_slotid != -1)
360 return;
361
362 dprintk("%s COMPLETE: Session Drained\n", __func__);
363 complete(&ses->complete);
364}
365
d61e612a 366static void nfs41_sequence_free_slot(const struct nfs_client *clp,
13615871
AA		 367 struct nfs4_sequence_res *res)
368{
369 struct nfs4_slot_table *tbl;
370
13615871
AA		 371 tbl = &clp->cl_session->fc_slot_table;
372 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 373 /* just wake up the next guy waiting since
374 * we may have not consumed a slot after all */
691daf3b 375 dprintk("%s: No slot\n", __func__);
35dc1d74 376 return;
13615871 377 }
ea028ac9 378
35dc1d74
TM		 379 spin_lock(&tbl->slot_tbl_lock);
380 nfs4_free_slot(tbl, res->sr_slotid);
3bfb0fc5 381 nfs41_check_drain_session_complete(clp->cl_session);
35dc1d74
TM		 382 spin_unlock(&tbl->slot_tbl_lock);
383 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 384}
385
b0df806c
AA		 386static void nfs41_sequence_done(struct nfs_client *clp,
387 struct nfs4_sequence_res *res,
388 int rpc_status)
389{
390 unsigned long timestamp;
391 struct nfs4_slot_table *tbl;
392 struct nfs4_slot *slot;
393
394 /*
395 * sr_status remains 1 if an RPC level error occurred. The server
396 * may or may not have processed the sequence operation..
397 * Proceed as if the server received and processed the sequence
398 * operation.
399 */
400 if (res->sr_status == 1)
401 res->sr_status = NFS_OK;
402
403 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
404 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
405 goto out;
406
691daf3b 407 /* Check the SEQUENCE operation status */
b0df806c 408 if (res->sr_status == 0) {
691daf3b
AA		 409 tbl = &clp->cl_session->fc_slot_table;
410 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 411 /* Update the slot's sequence and clientid lease timer */
412 ++slot->seq_nr;
413 timestamp = res->sr_renewal_time;
414 spin_lock(&clp->cl_lock);
415 if (time_before(clp->cl_last_renewal, timestamp))
416 clp->cl_last_renewal = timestamp;
417 spin_unlock(&clp->cl_lock);
0629e370
AB		 418 /* Check sequence flags */
419 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 420 }
421out:
422 /* The session may be reset by one of the error handlers. */
423 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
424 nfs41_sequence_free_slot(clp, res);
425}
426
510b8175
BH		 427/*
428 * nfs4_find_slot - efficiently look for a free slot
429 *
430 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
431 * If found, we mark the slot as used, update the highest_used_slotid,
432 * and respectively set up the sequence operation args.
433 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 434 *
435 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 436 */
437static u8
40ead580 438nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 439{
440 int slotid;
441 u8 ret_id = NFS4_MAX_SLOT_TABLE;
442 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
443
510b8175
BH		 444 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
445 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
446 tbl->max_slots);
447 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
448 if (slotid >= tbl->max_slots)
449 goto out;
450 __set_bit(slotid, tbl->used_slots);
451 if (slotid > tbl->highest_used_slotid)
452 tbl->highest_used_slotid = slotid;
453 ret_id = slotid;
454out:
455 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
456 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 457 return ret_id;
458}
459
ce5039c1
AA		 460static int nfs41_setup_sequence(struct nfs4_session *session,
461 struct nfs4_sequence_args *args,
462 struct nfs4_sequence_res *res,
463 int cache_reply,
464 struct rpc_task *task)
465{
fbcd4abc
AA		 466 struct nfs4_slot *slot;
467 struct nfs4_slot_table *tbl;
468 u8 slotid;
469
470 dprintk("--> %s\n", __func__);
ce5039c1
AA		 471 /* slot already allocated? */
472 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
473 return 0;
474
475 memset(res, 0, sizeof(*res));
476 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 477 tbl = &session->fc_slot_table;
478
479 spin_lock(&tbl->slot_tbl_lock);
0b9e2d41 480 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
ea028ac9
AA		 481 /*
482 * The state manager will wait until the slot table is empty.
483 * Schedule the reset thread
484 */
05f0d236 485 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 486 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 487 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 488 return -EAGAIN;
b069d94a
AA		 489 }
490
689cf5c1
AB		 491 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
492 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
493 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
494 spin_unlock(&tbl->slot_tbl_lock);
495 dprintk("%s enforce FIFO order\n", __func__);
496 return -EAGAIN;
497 }
498
40ead580 499 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 500 if (slotid == NFS4_MAX_SLOT_TABLE) {
501 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
502 spin_unlock(&tbl->slot_tbl_lock);
503 dprintk("<-- %s: no free slots\n", __func__);
504 return -EAGAIN;
505 }
506 spin_unlock(&tbl->slot_tbl_lock);
507
689cf5c1 508 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 509 slot = tbl->slots + slotid;
99fe60d0 510 args->sa_session = session;
fbcd4abc
AA		 511 args->sa_slotid = slotid;
512 args->sa_cache_this = cache_reply;
513
514 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
515
99fe60d0 516 res->sr_session = session;
fbcd4abc
AA		 517 res->sr_slotid = slotid;
518 res->sr_renewal_time = jiffies;
519 /*
520 * sr_status is only set in decode_sequence, and so will remain
521 * set to 1 if an rpc level failure occurs.
522 */
523 res->sr_status = 1;
ce5039c1
AA		 524 return 0;
525}
526
527int nfs4_setup_sequence(struct nfs_client *clp,
528 struct nfs4_sequence_args *args,
529 struct nfs4_sequence_res *res,
530 int cache_reply,
531 struct rpc_task *task)
532{
533 int ret = 0;
534
535 dprintk("--> %s clp %p session %p sr_slotid %d\n",
536 __func__, clp, clp->cl_session, res->sr_slotid);
537
538 if (!nfs4_has_session(clp))
539 goto out;
540 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
541 task);
2628eddf 542 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 543 /* terminate rpc task */
544 task->tk_status = ret;
545 task->tk_action = NULL;
546 }
547out:
548 dprintk("<-- %s status=%d\n", __func__, ret);
549 return ret;
550}
551
552struct nfs41_call_sync_data {
553 struct nfs_client *clp;
554 struct nfs4_sequence_args *seq_args;
555 struct nfs4_sequence_res *seq_res;
556 int cache_reply;
557};
558
559static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
560{
561 struct nfs41_call_sync_data *data = calldata;
562
563 dprintk("--> %s data->clp->cl_session %p\n", __func__,
564 data->clp->cl_session);
565 if (nfs4_setup_sequence(data->clp, data->seq_args,
566 data->seq_res, data->cache_reply, task))
567 return;
568 rpc_call_start(task);
569}
570
b257957e
AB		 571static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
572{
573 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
574 nfs41_call_sync_prepare(task, calldata);
575}
576
69ab40c4
AA		 577static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
578{
579 struct nfs41_call_sync_data *data = calldata;
580
581 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
69ab40c4
AA		 582}
583
ce5039c1
AA		 584struct rpc_call_ops nfs41_call_sync_ops = {
585 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 586 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 587};
588
b257957e
AB		 589struct rpc_call_ops nfs41_call_priv_sync_ops = {
590 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
591 .rpc_call_done = nfs41_call_sync_done,
592};
593
ce5039c1
AA		 594static int nfs4_call_sync_sequence(struct nfs_client *clp,
595 struct rpc_clnt *clnt,
596 struct rpc_message *msg,
597 struct nfs4_sequence_args *args,
598 struct nfs4_sequence_res *res,
b257957e
AB		 599 int cache_reply,
600 int privileged)
ce5039c1
AA		 601{
602 int ret;
603 struct rpc_task *task;
604 struct nfs41_call_sync_data data = {
605 .clp = clp,
606 .seq_args = args,
607 .seq_res = res,
608 .cache_reply = cache_reply,
609 };
610 struct rpc_task_setup task_setup = {
611 .rpc_client = clnt,
612 .rpc_message = msg,
613 .callback_ops = &nfs41_call_sync_ops,
614 .callback_data = &data
615 };
616
617 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 618 if (privileged)
619 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 620 task = rpc_run_task(&task_setup);
621 if (IS_ERR(task))
622 ret = PTR_ERR(task);
623 else {
624 ret = task->tk_status;
625 rpc_put_task(task);
626 }
627 return ret;
628}
629
cccef3b9
AA		 630int _nfs4_call_sync_session(struct nfs_server *server,
631 struct rpc_message *msg,
632 struct nfs4_sequence_args *args,
633 struct nfs4_sequence_res *res,
634 int cache_reply)
635{
ce5039c1 636 return nfs4_call_sync_sequence(server->nfs_client, server->client,
b257957e 637 msg, args, res, cache_reply, 0);
cccef3b9
AA		 638}
639
640#endif /* CONFIG_NFS_V4_1 */
641
642int _nfs4_call_sync(struct nfs_server *server,
643 struct rpc_message *msg,
644 struct nfs4_sequence_args *args,
645 struct nfs4_sequence_res *res,
646 int cache_reply)
647{
f3752975 648 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 649 return rpc_call_sync(server->client, msg, 0);
650}
651
652#define nfs4_call_sync(server, msg, args, res, cache_reply) \
653 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
654 &(res)->seq_res, (cache_reply))
655
b0df806c
AA		 656static void nfs4_sequence_done(const struct nfs_server *server,
657 struct nfs4_sequence_res *res, int rpc_status)
658{
659#ifdef CONFIG_NFS_V4_1
660 if (nfs4_has_session(server->nfs_client))
661 nfs41_sequence_done(server->nfs_client, res, rpc_status);
662#endif /* CONFIG_NFS_V4_1 */
663}
664
38478b24 665static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 666{
38478b24 667 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 668
38478b24 669 spin_lock(&dir->i_lock);
40d24704
TM		 670 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
671 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 672 nfs_force_lookup_revalidate(dir);
40d24704 673 nfsi->change_attr = cinfo->after;
38478b24 674 spin_unlock(&dir->i_lock);
1da177e4
LT		 675}
676
e56e0b78 677struct nfs4_opendata {
c6d00e63 678 struct kref kref;
e56e0b78
TM		 679 struct nfs_openargs o_arg;
680 struct nfs_openres o_res;
cdd4e68b
TM		 681 struct nfs_open_confirmargs c_arg;
682 struct nfs_open_confirmres c_res;
e56e0b78
TM		 683 struct nfs_fattr f_attr;
684 struct nfs_fattr dir_attr;
ad389da7 685 struct path path;
e56e0b78
TM		 686 struct dentry *dir;
687 struct nfs4_state_owner *owner;
aac00a8d 688 struct nfs4_state *state;
e56e0b78 689 struct iattr attrs;
26e976a8 690 unsigned long timestamp;
3e309914 691 unsigned int rpc_done : 1;
24ac23ab
TM		 692 int rpc_status;
693 int cancelled;
e56e0b78
TM		 694};
695
2ced46c2
TM		 696
697static void nfs4_init_opendata_res(struct nfs4_opendata *p)
698{
699 p->o_res.f_attr = &p->f_attr;
700 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 701 p->o_res.seqid = p->o_arg.seqid;
702 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 703 p->o_res.server = p->o_arg.server;
704 nfs_fattr_init(&p->f_attr);
705 nfs_fattr_init(&p->dir_attr);
578e4585 706 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 707}
708
ad389da7 709static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 710 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 711 const struct iattr *attrs)
712{
ad389da7 713 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 714 struct inode *dir = parent->d_inode;
715 struct nfs_server *server = NFS_SERVER(dir);
716 struct nfs4_opendata *p;
717
718 p = kzalloc(sizeof(*p), GFP_KERNEL);
719 if (p == NULL)
720 goto err;
721 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
722 if (p->o_arg.seqid == NULL)
723 goto err_free;
ad389da7
TM		 724 p->path.mnt = mntget(path->mnt);
725 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 726 p->dir = parent;
727 p->owner = sp;
728 atomic_inc(&sp->so_count);
729 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 730 p->o_arg.open_flags = flags;
731 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 732 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 733 p->o_arg.id = sp->so_owner_id.id;
ad389da7 734 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 735 p->o_arg.server = server;
736 p->o_arg.bitmask = server->attr_bitmask;
737 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 738 if (flags & O_EXCL) {
4882ef72
AB		 739 if (nfs4_has_persistent_session(server->nfs_client)) {
740 /* GUARDED */
741 p->o_arg.u.attrs = &p->attrs;
742 memcpy(&p->attrs, attrs, sizeof(p->attrs));
743 } else { /* EXCLUSIVE4_1 */
744 u32 *s = (u32 *) p->o_arg.u.verifier.data;
745 s[0] = jiffies;
746 s[1] = current->pid;
747 }
e56e0b78
TM		 748 } else if (flags & O_CREAT) {
749 p->o_arg.u.attrs = &p->attrs;
750 memcpy(&p->attrs, attrs, sizeof(p->attrs));
751 }
cdd4e68b
TM		 752 p->c_arg.fh = &p->o_res.fh;
753 p->c_arg.stateid = &p->o_res.stateid;
754 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 755 nfs4_init_opendata_res(p);
c6d00e63 756 kref_init(&p->kref);
e56e0b78
TM		 757 return p;
758err_free:
759 kfree(p);
760err:
761 dput(parent);
762 return NULL;
763}
764
c6d00e63 765static void nfs4_opendata_free(struct kref *kref)
e56e0b78 766{
c6d00e63
TM		 767 struct nfs4_opendata *p = container_of(kref,
768 struct nfs4_opendata, kref);
769
770 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 771 if (p->state != NULL)
772 nfs4_put_open_state(p->state);
c6d00e63
TM		 773 nfs4_put_state_owner(p->owner);
774 dput(p->dir);
31f31db1 775 path_put(&p->path);
c6d00e63
TM		 776 kfree(p);
777}
778
779static void nfs4_opendata_put(struct nfs4_opendata *p)
780{
781 if (p != NULL)
782 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 783}
784
06f814a3
TM		 785static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
786{
06f814a3
TM		 787 int ret;
788
06f814a3 789 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 790 return ret;
791}
792
dc0b027d 793static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 794{
795 int ret = 0;
dc0b027d
TM		 796
797 if (open_mode & O_EXCL)
798 goto out;
799 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 800 case FMODE_READ:
88069f77
TM		 801 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
802 && state->n_rdonly != 0;
6ee41268
TM		 803 break;
804 case FMODE_WRITE:
88069f77
TM		 805 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
806 && state->n_wronly != 0;
6ee41268
TM		 807 break;
808 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 809 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
810 && state->n_rdwr != 0;
6ee41268 811 }
dc0b027d 812out:
6ee41268
TM		 813 return ret;
814}
815
dc0b027d 816static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 817{
dc0b027d 818 if ((delegation->type & fmode) != fmode)
aac00a8d 819 return 0;
15c831bf 820 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 821 return 0;
b7391f44 822 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 823 return 1;
824}
825
dc0b027d 826static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 827{
dc0b027d 828 switch (fmode) {
e7616923
TM		 829 case FMODE_WRITE:
830 state->n_wronly++;
831 break;
832 case FMODE_READ:
833 state->n_rdonly++;
834 break;
835 case FMODE_READ|FMODE_WRITE:
836 state->n_rdwr++;
837 }
dc0b027d 838 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 839}
840
dc0b027d 841static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 842{
843 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
844 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
845 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 846 switch (fmode) {
003707c7
TM		 847 case FMODE_READ:
848 set_bit(NFS_O_RDONLY_STATE, &state->flags);
849 break;
850 case FMODE_WRITE:
851 set_bit(NFS_O_WRONLY_STATE, &state->flags);
852 break;
853 case FMODE_READ|FMODE_WRITE:
854 set_bit(NFS_O_RDWR_STATE, &state->flags);
855 }
e7616923
TM		 856}
857
dc0b027d 858static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 859{
8bda4e4c 860 write_seqlock(&state->seqlock);
dc0b027d 861 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 862 write_sequnlock(&state->seqlock);
003707c7
TM		 863}
864
dc0b027d 865static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 866{
8bda4e4c
TM		 867 /*
868 * Protect the call to nfs4_state_set_mode_locked and
869 * serialise the stateid update
870 */
871 write_seqlock(&state->seqlock);
003707c7
TM		 872 if (deleg_stateid != NULL) {
873 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
874 set_bit(NFS_DELEGATED_STATE, &state->flags);
875 }
876 if (open_stateid != NULL)
dc0b027d 877 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 878 write_sequnlock(&state->seqlock);
879 spin_lock(&state->owner->so_lock);
dc0b027d 880 update_open_stateflags(state, fmode);
ec073428 881 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 882}
883
dc0b027d 884static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 885{
886 struct nfs_inode *nfsi = NFS_I(state->inode);
887 struct nfs_delegation *deleg_cur;
888 int ret = 0;
889
dc0b027d 890 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 891
892 rcu_read_lock();
893 deleg_cur = rcu_dereference(nfsi->delegation);
894 if (deleg_cur == NULL)
895 goto no_delegation;
896
897 spin_lock(&deleg_cur->lock);
898 if (nfsi->delegation != deleg_cur ||
dc0b027d 899 (deleg_cur->type & fmode) != fmode)
34310430
TM		 900 goto no_delegation_unlock;
901
902 if (delegation == NULL)
903 delegation = &deleg_cur->stateid;
904 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
905 goto no_delegation_unlock;
906
b7391f44 907 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 908 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 909 ret = 1;
910no_delegation_unlock:
911 spin_unlock(&deleg_cur->lock);
912no_delegation:
913 rcu_read_unlock();
914
915 if (!ret && open_stateid != NULL) {
dc0b027d 916 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 917 ret = 1;
918 }
919
920 return ret;
921}
922
923
dc0b027d 924static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 925{
926 struct nfs_delegation *delegation;
927
928 rcu_read_lock();
929 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 930 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 931 rcu_read_unlock();
932 return;
933 }
934 rcu_read_unlock();
935 nfs_inode_return_delegation(inode);
936}
937
6ee41268 938static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 939{
940 struct nfs4_state *state = opendata->state;
941 struct nfs_inode *nfsi = NFS_I(state->inode);
942 struct nfs_delegation *delegation;
dc0b027d
TM		 943 int open_mode = opendata->o_arg.open_flags & O_EXCL;
944 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 945 nfs4_stateid stateid;
946 int ret = -EAGAIN;
947
aac00a8d 948 for (;;) {
dc0b027d 949 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 950 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 951 if (can_open_cached(state, fmode, open_mode)) {
952 update_open_stateflags(state, fmode);
6ee41268 953 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 954 goto out_return_state;
955 }
956 spin_unlock(&state->owner->so_lock);
957 }
34310430
TM		 958 rcu_read_lock();
959 delegation = rcu_dereference(nfsi->delegation);
960 if (delegation == NULL ||
dc0b027d 961 !can_open_delegated(delegation, fmode)) {
34310430 962 rcu_read_unlock();
aac00a8d 963 break;
34310430 964 }
aac00a8d
TM		 965 /* Save the delegation */
966 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
967 rcu_read_unlock();
af22f94a 968 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 969 if (ret != 0)
970 goto out;
971 ret = -EAGAIN;
34310430
TM		 972
973 /* Try to update the stateid using the delegation */
dc0b027d 974 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 975 goto out_return_state;
aac00a8d 976 }
aac00a8d
TM		 977out:
978 return ERR_PTR(ret);
979out_return_state:
980 atomic_inc(&state->count);
981 return state;
982}
983
24ac23ab
TM		 984static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
985{
986 struct inode *inode;
987 struct nfs4_state *state = NULL;
003707c7 988 struct nfs_delegation *delegation;
1b370bc2 989 int ret;
24ac23ab 990
aac00a8d 991 if (!data->rpc_done) {
6ee41268 992 state = nfs4_try_open_cached(data);
aac00a8d
TM		 993 goto out;
994 }
995
1b370bc2 996 ret = -EAGAIN;
24ac23ab 997 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 998 goto err;
24ac23ab 999 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1000 ret = PTR_ERR(inode);
03f28e3a 1001 if (IS_ERR(inode))
1b370bc2
TM		 1002 goto err;
1003 ret = -ENOMEM;
24ac23ab
TM		 1004 state = nfs4_get_open_state(inode, data->owner);
1005 if (state == NULL)
1b370bc2 1006 goto err_put_inode;
549d6ed5 1007 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1008 int delegation_flags = 0;
1009
003707c7
TM		 1010 rcu_read_lock();
1011 delegation = rcu_dereference(NFS_I(inode)->delegation);
1012 if (delegation)
1013 delegation_flags = delegation->flags;
1014 rcu_read_unlock();
15c831bf 1015 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1016 nfs_inode_set_delegation(state->inode,
1017 data->owner->so_cred,
1018 &data->o_res);
1019 else
1020 nfs_inode_reclaim_delegation(state->inode,
1021 data->owner->so_cred,
1022 &data->o_res);
1023 }
34310430
TM		 1024
1025 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1026 data->o_arg.fmode);
24ac23ab 1027 iput(inode);
aac00a8d 1028out:
24ac23ab 1029 return state;
1b370bc2
TM		 1030err_put_inode:
1031 iput(inode);
1032err:
1033 return ERR_PTR(ret);
24ac23ab
TM		 1034}
1035
864472e9
TM		 1036static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1037{
1038 struct nfs_inode *nfsi = NFS_I(state->inode);
1039 struct nfs_open_context *ctx;
1040
1041 spin_lock(&state->inode->i_lock);
1042 list_for_each_entry(ctx, &nfsi->open_files, list) {
1043 if (ctx->state != state)
1044 continue;
1045 get_nfs_open_context(ctx);
1046 spin_unlock(&state->inode->i_lock);
1047 return ctx;
1048 }
1049 spin_unlock(&state->inode->i_lock);
1050 return ERR_PTR(-ENOENT);
1051}
1052
6f220ed5
TM		 1053static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1054{
1055 struct nfs4_opendata *opendata;
1056
dc0b027d 1057 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1058 if (opendata == NULL)
1059 return ERR_PTR(-ENOMEM);
1060 opendata->state = state;
1061 atomic_inc(&state->count);
1062 return opendata;
1063}
1064
dc0b027d 1065static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1066{
2ced46c2 1067 struct nfs4_state *newstate;
864472e9
TM		 1068 int ret;
1069
dc0b027d
TM		 1070 opendata->o_arg.open_flags = 0;
1071 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1072 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1073 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1074 nfs4_init_opendata_res(opendata);
b257957e 1075 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1076 if (ret != 0)
1077 return ret;
2ced46c2 1078 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1079 if (IS_ERR(newstate))
1080 return PTR_ERR(newstate);
dc0b027d 1081 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1082 *res = newstate;
864472e9
TM		 1083 return 0;
1084}
1085
1086static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1087{
864472e9 1088 struct nfs4_state *newstate;
864472e9
TM		 1089 int ret;
1090
1091 /* memory barrier prior to reading state->n_* */
2ced46c2 1092 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1093 smp_rmb();
1094 if (state->n_rdwr != 0) {
2ced46c2 1095 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1096 if (ret != 0)
1097 return ret;
2ced46c2
TM		 1098 if (newstate != state)
1099 return -ESTALE;
864472e9
TM		 1100 }
1101 if (state->n_wronly != 0) {
2ced46c2 1102 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1103 if (ret != 0)
1104 return ret;
2ced46c2
TM		 1105 if (newstate != state)
1106 return -ESTALE;
864472e9
TM		 1107 }
1108 if (state->n_rdonly != 0) {
2ced46c2 1109 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1110 if (ret != 0)
1111 return ret;
2ced46c2
TM		 1112 if (newstate != state)
1113 return -ESTALE;
864472e9 1114 }
1ac7e2fd
TM		 1115 /*
1116 * We may have performed cached opens for all three recoveries.
1117 * Check if we need to update the current stateid.
1118 */
1119 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1120 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1121 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1122 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1123 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1124 write_sequnlock(&state->seqlock);
1ac7e2fd 1125 }
864472e9
TM		 1126 return 0;
1127}
1128
1da177e4
LT		 1129/*
1130 * OPEN_RECLAIM:
1131 * reclaim state on the server after a reboot.
1da177e4 1132 */
539cd03a 1133static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1134{
1ac7e2fd 1135 struct nfs_delegation *delegation;
864472e9 1136 struct nfs4_opendata *opendata;
dc0b027d 1137 fmode_t delegation_type = 0;
1da177e4
LT		 1138 int status;
1139
6f220ed5
TM		 1140 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1141 if (IS_ERR(opendata))
1142 return PTR_ERR(opendata);
864472e9
TM		 1143 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1144 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1147 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1148 delegation_type = delegation->type;
1ac7e2fd 1149 rcu_read_unlock();
864472e9
TM		 1150 opendata->o_arg.u.delegation_type = delegation_type;
1151 status = nfs4_open_recover(opendata, state);
c6d00e63 1152 nfs4_opendata_put(opendata);
1da177e4
LT		 1153 return status;
1154}
1155
539cd03a 1156static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1157{
1158 struct nfs_server *server = NFS_SERVER(state->inode);
1159 struct nfs4_exception exception = { };
1160 int err;
1161 do {
539cd03a 1162 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1163 if (err != -NFS4ERR_DELAY)
1164 break;
1165 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1166 } while (exception.retry);
1167 return err;
1168}
1169
864472e9
TM		 1170static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1171{
1172 struct nfs_open_context *ctx;
1173 int ret;
1174
1175 ctx = nfs4_state_find_open_context(state);
1176 if (IS_ERR(ctx))
1177 return PTR_ERR(ctx);
539cd03a 1178 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1179 put_nfs_open_context(ctx);
1180 return ret;
1181}
1182
13437e12 1183static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1184{
e56e0b78 1185 struct nfs4_opendata *opendata;
864472e9 1186 int ret;
1da177e4 1187
6f220ed5
TM		 1188 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1189 if (IS_ERR(opendata))
1190 return PTR_ERR(opendata);
e56e0b78 1191 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1192 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1193 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1194 ret = nfs4_open_recover(opendata, state);
c6d00e63 1195 nfs4_opendata_put(opendata);
864472e9 1196 return ret;
1da177e4
LT		 1197}
1198
13437e12 1199int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1200{
1201 struct nfs4_exception exception = { };
539cd03a 1202 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1203 int err;
1204 do {
13437e12 1205 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1206 switch (err) {
1207 case 0:
965b5d67
TM		 1208 case -ENOENT:
1209 case -ESTALE:
1210 goto out;
bcfa49f6
RL		 1211 case -NFS4ERR_BADSESSION:
1212 case -NFS4ERR_BADSLOT:
1213 case -NFS4ERR_BAD_HIGH_SLOT:
1214 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1215 case -NFS4ERR_DEADSESSION:
1216 nfs4_schedule_state_recovery(
1217 server->nfs_client);
1218 goto out;
1da177e4
LT		 1219 case -NFS4ERR_STALE_CLIENTID:
1220 case -NFS4ERR_STALE_STATEID:
1221 case -NFS4ERR_EXPIRED:
1222 /* Don't recall a delegation if it was lost */
7539bbab 1223 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1224 goto out;
1225 case -ERESTARTSYS:
1226 /*
1227 * The show must go on: exit, but mark the
1228 * stateid as needing recovery.
1229 */
1230 case -NFS4ERR_ADMIN_REVOKED:
1231 case -NFS4ERR_BAD_STATEID:
1232 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1233 case -ENOMEM:
1234 err = 0;
1235 goto out;
1da177e4
LT		 1236 }
1237 err = nfs4_handle_exception(server, err, &exception);
1238 } while (exception.retry);
965b5d67 1239out:
1da177e4
LT		 1240 return err;
1241}
1242
cdd4e68b
TM		 1243static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1244{
1245 struct nfs4_opendata *data = calldata;
1246
1247 data->rpc_status = task->tk_status;
1248 if (RPC_ASSASSINATED(task))
1249 return;
26e976a8 1250 if (data->rpc_status == 0) {
cdd4e68b
TM		 1251 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1252 sizeof(data->o_res.stateid.data));
bb22629e 1253 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1254 renew_lease(data->o_res.server, data->timestamp);
3e309914 1255 data->rpc_done = 1;
26e976a8 1256 }
cdd4e68b
TM		 1257}
1258
1259static void nfs4_open_confirm_release(void *calldata)
1260{
1261 struct nfs4_opendata *data = calldata;
1262 struct nfs4_state *state = NULL;
1263
1264 /* If this request hasn't been cancelled, do nothing */
1265 if (data->cancelled == 0)
1266 goto out_free;
1267 /* In case of error, no cleanup! */
3e309914 1268 if (!data->rpc_done)
cdd4e68b 1269 goto out_free;
cdd4e68b 1270 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1271 if (!IS_ERR(state))
dc0b027d 1272 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1273out_free:
c6d00e63 1274 nfs4_opendata_put(data);
cdd4e68b
TM		 1275}
1276
1277static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1278 .rpc_call_done = nfs4_open_confirm_done,
1279 .rpc_release = nfs4_open_confirm_release,
1280};
1281
1282/*
1283 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1284 */
1285static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1286{
1287 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1288 struct rpc_task *task;
5138fde0
TM		 1289 struct rpc_message msg = {
1290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1291 .rpc_argp = &data->c_arg,
1292 .rpc_resp = &data->c_res,
1293 .rpc_cred = data->owner->so_cred,
1294 };
c970aa85
TM		 1295 struct rpc_task_setup task_setup_data = {
1296 .rpc_client = server->client,
5138fde0 1297 .rpc_message = &msg,
c970aa85
TM		 1298 .callback_ops = &nfs4_open_confirm_ops,
1299 .callback_data = data,
101070ca 1300 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1301 .flags = RPC_TASK_ASYNC,
1302 };
1da177e4
LT		 1303 int status;
1304
c6d00e63 1305 kref_get(&data->kref);
3e309914
TM		 1306 data->rpc_done = 0;
1307 data->rpc_status = 0;
5138fde0 1308 data->timestamp = jiffies;
c970aa85 1309 task = rpc_run_task(&task_setup_data);
7a1218a2 1310 if (IS_ERR(task))
cdd4e68b 1311 return PTR_ERR(task);
cdd4e68b
TM		 1312 status = nfs4_wait_for_completion_rpc_task(task);
1313 if (status != 0) {
1314 data->cancelled = 1;
1315 smp_wmb();
1316 } else
1317 status = data->rpc_status;
e6b3c4db 1318 rpc_put_task(task);
1da177e4
LT		 1319 return status;
1320}
1321
24ac23ab 1322static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1323{
24ac23ab
TM		 1324 struct nfs4_opendata *data = calldata;
1325 struct nfs4_state_owner *sp = data->owner;
5138fde0 1326
24ac23ab
TM		 1327 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1328 return;
aac00a8d
TM		 1329 /*
1330 * Check if we still need to send an OPEN call, or if we can use
1331 * a delegation instead.
1332 */
1333 if (data->state != NULL) {
1334 struct nfs_delegation *delegation;
1335
dc0b027d 1336 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1337 goto out_no_action;
aac00a8d
TM		 1338 rcu_read_lock();
1339 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1340 if (delegation != NULL &&
15c831bf 1341 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1342 rcu_read_unlock();
6ee41268 1343 goto out_no_action;
aac00a8d
TM		 1344 }
1345 rcu_read_unlock();
1346 }
24ac23ab 1347 /* Update sequence id. */
9f958ab8 1348 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1349 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1350 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1351 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1352 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1353 }
26e976a8 1354 data->timestamp = jiffies;
d898528c
AA		 1355 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1356 &data->o_arg.seq_args,
1357 &data->o_res.seq_res, 1, task))
1358 return;
5138fde0 1359 rpc_call_start(task);
6ee41268
TM		 1360 return;
1361out_no_action:
1362 task->tk_action = NULL;
1363
24ac23ab 1364}
1da177e4 1365
b257957e
AB		 1366static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1367{
1368 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1369 nfs4_open_prepare(task, calldata);
1370}
1371
24ac23ab
TM		 1372static void nfs4_open_done(struct rpc_task *task, void *calldata)
1373{
1374 struct nfs4_opendata *data = calldata;
1da177e4 1375
24ac23ab 1376 data->rpc_status = task->tk_status;
d898528c 1377
d61e612a
TM		 1378 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1379 task->tk_status);
d898528c 1380
24ac23ab
TM		 1381 if (RPC_ASSASSINATED(task))
1382 return;
1383 if (task->tk_status == 0) {
1384 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1385 case S_IFREG:
1386 break;
1387 case S_IFLNK:
24ac23ab 1388 data->rpc_status = -ELOOP;
6f926b5b
TM		 1389 break;
1390 case S_IFDIR:
24ac23ab 1391 data->rpc_status = -EISDIR;
6f926b5b
TM		 1392 break;
1393 default:
24ac23ab 1394 data->rpc_status = -ENOTDIR;
6f926b5b 1395 }
26e976a8 1396 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1397 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1398 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1399 }
3e309914 1400 data->rpc_done = 1;
24ac23ab 1401}
6f926b5b 1402
24ac23ab
TM		 1403static void nfs4_open_release(void *calldata)
1404{
1405 struct nfs4_opendata *data = calldata;
1406 struct nfs4_state *state = NULL;
1407
1408 /* If this request hasn't been cancelled, do nothing */
1409 if (data->cancelled == 0)
1410 goto out_free;
1411 /* In case of error, no cleanup! */
3e309914 1412 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1413 goto out_free;
1414 /* In case we need an open_confirm, no cleanup! */
1415 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1416 goto out_free;
24ac23ab 1417 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1418 if (!IS_ERR(state))
dc0b027d 1419 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1420out_free:
c6d00e63 1421 nfs4_opendata_put(data);
24ac23ab
TM		 1422}
1423
1424static const struct rpc_call_ops nfs4_open_ops = {
1425 .rpc_call_prepare = nfs4_open_prepare,
1426 .rpc_call_done = nfs4_open_done,
1427 .rpc_release = nfs4_open_release,
1428};
1429
b257957e
AB		 1430static const struct rpc_call_ops nfs4_recover_open_ops = {
1431 .rpc_call_prepare = nfs4_recover_open_prepare,
1432 .rpc_call_done = nfs4_open_done,
1433 .rpc_release = nfs4_open_release,
1434};
1435
1436static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1437{
1438 struct inode *dir = data->dir->d_inode;
1439 struct nfs_server *server = NFS_SERVER(dir);
1440 struct nfs_openargs *o_arg = &data->o_arg;
1441 struct nfs_openres *o_res = &data->o_res;
1442 struct rpc_task *task;
5138fde0
TM		 1443 struct rpc_message msg = {
1444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1445 .rpc_argp = o_arg,
1446 .rpc_resp = o_res,
1447 .rpc_cred = data->owner->so_cred,
1448 };
c970aa85
TM		 1449 struct rpc_task_setup task_setup_data = {
1450 .rpc_client = server->client,
5138fde0 1451 .rpc_message = &msg,
c970aa85
TM		 1452 .callback_ops = &nfs4_open_ops,
1453 .callback_data = data,
101070ca 1454 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1455 .flags = RPC_TASK_ASYNC,
1456 };
24ac23ab
TM		 1457 int status;
1458
c6d00e63 1459 kref_get(&data->kref);
3e309914
TM		 1460 data->rpc_done = 0;
1461 data->rpc_status = 0;
2ced46c2 1462 data->cancelled = 0;
b257957e
AB		 1463 if (isrecover)
1464 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1465 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1466 if (IS_ERR(task))
1467 return PTR_ERR(task);
1468 status = nfs4_wait_for_completion_rpc_task(task);
1469 if (status != 0) {
1470 data->cancelled = 1;
1471 smp_wmb();
1472 } else
1473 status = data->rpc_status;
1474 rpc_put_task(task);
1475
1476 return status;
1477}
1478
1479static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1480{
1481 struct inode *dir = data->dir->d_inode;
1482 struct nfs_openres *o_res = &data->o_res;
1483 int status;
1484
1485 status = nfs4_run_open_task(data, 1);
1486 if (status != 0 || !data->rpc_done)
1487 return status;
1488
1489 nfs_refresh_inode(dir, o_res->dir_attr);
1490
1491 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1492 status = _nfs4_proc_open_confirm(data);
1493 if (status != 0)
1494 return status;
1495 }
1496
1497 return status;
1498}
1499
1500/*
1501 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1502 */
1503static int _nfs4_proc_open(struct nfs4_opendata *data)
1504{
1505 struct inode *dir = data->dir->d_inode;
1506 struct nfs_server *server = NFS_SERVER(dir);
1507 struct nfs_openargs *o_arg = &data->o_arg;
1508 struct nfs_openres *o_res = &data->o_res;
1509 int status;
1510
1511 status = nfs4_run_open_task(data, 0);
3e309914 1512 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1513 return status;
1514
56ae19f3
TM		 1515 if (o_arg->open_flags & O_CREAT) {
1516 update_changeattr(dir, &o_res->cinfo);
1517 nfs_post_op_update_inode(dir, o_res->dir_attr);
1518 } else
1519 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1520 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1521 status = _nfs4_proc_open_confirm(data);
1da177e4 1522 if (status != 0)
24ac23ab 1523 return status;
1da177e4
LT		 1524 }
1525 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1526 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1527 return 0;
1da177e4
LT		 1528}
1529
10afec90 1530static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1531{
7539bbab 1532 struct nfs_client *clp = server->nfs_client;
a78cb57a 1533 unsigned int loop;
6b30954e 1534 int ret;
58d9714a 1535
a78cb57a 1536 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1537 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1538 if (ret != 0)
a78cb57a 1539 break;
e598d843
TM		 1540 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1541 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1542 break;
58d9714a 1543 nfs4_schedule_state_recovery(clp);
a78cb57a 1544 ret = -EIO;
6b30954e 1545 }
a78cb57a 1546 return ret;
58d9714a
TM		 1547}
1548
1da177e4
LT		 1549/*
1550 * OPEN_EXPIRED:
1551 * reclaim state on the server after a network partition.
1552 * Assumes caller holds the appropriate lock
1553 */
539cd03a 1554static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1555{
e56e0b78 1556 struct nfs4_opendata *opendata;
864472e9 1557 int ret;
1da177e4 1558
6f220ed5
TM		 1559 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1560 if (IS_ERR(opendata))
1561 return PTR_ERR(opendata);
864472e9 1562 ret = nfs4_open_recover(opendata, state);
35d05778 1563 if (ret == -ESTALE)
539cd03a 1564 d_drop(ctx->path.dentry);
c6d00e63 1565 nfs4_opendata_put(opendata);
864472e9 1566 return ret;
1da177e4
LT		 1567}
1568
a9ed2e25 1569static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1570{
539cd03a 1571 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1572 struct nfs4_exception exception = { };
1573 int err;
1574
1575 do {
539cd03a 1576 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1577 switch (err) {
1578 default:
1579 goto out;
1580 case -NFS4ERR_GRACE:
1581 case -NFS4ERR_DELAY:
1582 nfs4_handle_exception(server, err, &exception);
1583 err = 0;
1584 }
202b50dc 1585 } while (exception.retry);
a9ed2e25 1586out:
202b50dc
TM		 1587 return err;
1588}
1589
1da177e4
LT		 1590static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1591{
1da177e4 1592 struct nfs_open_context *ctx;
864472e9 1593 int ret;
1da177e4 1594
864472e9
TM		 1595 ctx = nfs4_state_find_open_context(state);
1596 if (IS_ERR(ctx))
1597 return PTR_ERR(ctx);
539cd03a 1598 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1599 put_nfs_open_context(ctx);
1600 return ret;
1da177e4
LT		 1601}
1602
aa53ed54
JL		 1603/*
1604 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1605 * fields corresponding to attributes that were used to store the verifier.
1606 * Make sure we clobber those fields in the later setattr call
1607 */
1608static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1609{
1610 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1611 !(sattr->ia_valid & ATTR_ATIME_SET))
1612 sattr->ia_valid |= ATTR_ATIME;
1613
1614 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1615 !(sattr->ia_valid & ATTR_MTIME_SET))
1616 sattr->ia_valid |= ATTR_MTIME;
1617}
1618
1da177e4 1619/*
24ac23ab 1620 * Returns a referenced nfs4_state
1da177e4 1621 */
dc0b027d 1622static 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		 1623{
1624 struct nfs4_state_owner *sp;
1625 struct nfs4_state *state = NULL;
1626 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1627 struct nfs4_opendata *opendata;
aac00a8d 1628 int status;
1da177e4
LT		 1629
1630 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1631 status = -ENOMEM;
1632 if (!(sp = nfs4_get_state_owner(server, cred))) {
1633 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1634 goto out_err;
1635 }
58d9714a
TM		 1636 status = nfs4_recover_expired_lease(server);
1637 if (status != 0)
b4454fe1 1638 goto err_put_state_owner;
aac00a8d 1639 if (path->dentry->d_inode != NULL)
dc0b027d 1640 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1641 status = -ENOMEM;
dc0b027d 1642 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1643 if (opendata == NULL)
95d35cb4 1644 goto err_put_state_owner;
1da177e4 1645
aac00a8d
TM		 1646 if (path->dentry->d_inode != NULL)
1647 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1648
24ac23ab 1649 status = _nfs4_proc_open(opendata);
1da177e4 1650 if (status != 0)
c6d00e63 1651 goto err_opendata_put;
1da177e4 1652
aa53ed54
JL		 1653 if (opendata->o_arg.open_flags & O_EXCL)
1654 nfs4_exclusive_attrset(opendata, sattr);
1655
24ac23ab 1656 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1657 status = PTR_ERR(state);
1658 if (IS_ERR(state))
c6d00e63 1659 goto err_opendata_put;
c6d00e63 1660 nfs4_opendata_put(opendata);
1da177e4 1661 nfs4_put_state_owner(sp);
1da177e4
LT		 1662 *res = state;
1663 return 0;
c6d00e63
TM		 1664err_opendata_put:
1665 nfs4_opendata_put(opendata);
e56e0b78
TM		 1666err_put_state_owner:
1667 nfs4_put_state_owner(sp);
1da177e4 1668out_err:
1da177e4
LT		 1669 *res = NULL;
1670 return status;
1671}
1672
1673
dc0b027d 1674static 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		 1675{
1676 struct nfs4_exception exception = { };
1677 struct nfs4_state *res;
1678 int status;
1679
1680 do {
dc0b027d 1681 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1682 if (status == 0)
1683 break;
1684 /* NOTE: BAD_SEQID means the server and client disagree about the
1685 * book-keeping w.r.t. state-changing operations
1686 * (OPEN/CLOSE/LOCK/LOCKU...)
1687 * It is actually a sign of a bug on the client or on the server.
1688 *
1689 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1690 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1691 * have unhashed the old state_owner for us, and that we can
1692 * therefore safely retry using a new one. We should still warn
1693 * the user though...
1694 */
1695 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1696 printk(KERN_WARNING "NFS: v4 server %s "
1697 " returned a bad sequence-id error!\n",
1698 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1699 exception.retry = 1;
1700 continue;
1701 }
550f5747
TM		 1702 /*
1703 * BAD_STATEID on OPEN means that the server cancelled our
1704 * state before it received the OPEN_CONFIRM.
1705 * Recover by retrying the request as per the discussion
1706 * on Page 181 of RFC3530.
1707 */
1708 if (status == -NFS4ERR_BAD_STATEID) {
1709 exception.retry = 1;
1710 continue;
1711 }
aac00a8d
TM		 1712 if (status == -EAGAIN) {
1713 /* We must have found a delegation */
1714 exception.retry = 1;
1715 continue;
1716 }
1da177e4
LT		 1717 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1718 status, &exception));
1719 } while (exception.retry);
1720 return res;
1721}
1722
659bfcd6
TM		 1723static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1724 struct nfs_fattr *fattr, struct iattr *sattr,
1725 struct nfs4_state *state)
1da177e4 1726{
3e4f6290 1727 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1728 struct nfs_setattrargs arg = {
3e4f6290 1729 .fh = NFS_FH(inode),
1da177e4
LT		 1730 .iap = sattr,
1731 .server = server,
1732 .bitmask = server->attr_bitmask,
1733 };
1734 struct nfs_setattrres res = {
1735 .fattr = fattr,
1736 .server = server,
1737 };
1738 struct rpc_message msg = {
659bfcd6
TM		 1739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1740 .rpc_argp = &arg,
1741 .rpc_resp = &res,
1742 .rpc_cred = cred,
1da177e4 1743 };
26e976a8 1744 unsigned long timestamp = jiffies;
65e4308d 1745 int status;
1da177e4 1746
0e574af1 1747 nfs_fattr_init(fattr);
1da177e4 1748
3e4f6290
TM		 1749 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1750 /* Use that stateid */
1751 } else if (state != NULL) {
08e9eac4
TM		 1752 nfs4_copy_stateid(&arg.stateid, state, current->files);
1753 } else
1da177e4
LT		 1754 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1755
cccef3b9 1756 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1757 if (status == 0 && state != NULL)
1758 renew_lease(server, timestamp);
65e4308d 1759 return status;
1da177e4
LT		 1760}
1761
659bfcd6
TM		 1762static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1763 struct nfs_fattr *fattr, struct iattr *sattr,
1764 struct nfs4_state *state)
1da177e4 1765{
3e4f6290 1766 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1767 struct nfs4_exception exception = { };
1768 int err;
1769 do {
1770 err = nfs4_handle_exception(server,
659bfcd6 1771 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1772 &exception);
1773 } while (exception.retry);
1774 return err;
1775}
1776
1777struct nfs4_closedata {
4a35bd41 1778 struct path path;
1da177e4
LT		 1779 struct inode *inode;
1780 struct nfs4_state *state;
1781 struct nfs_closeargs arg;
1782 struct nfs_closeres res;
516a6af6 1783 struct nfs_fattr fattr;
26e976a8 1784 unsigned long timestamp;
1da177e4
LT		 1785};
1786
963d8fe5 1787static void nfs4_free_closedata(void *data)
9512135d 1788{
963d8fe5
TM		 1789 struct nfs4_closedata *calldata = data;
1790 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1791
1792 nfs4_put_open_state(calldata->state);
1793 nfs_free_seqid(calldata->arg.seqid);
9512135d 1794 nfs4_put_state_owner(sp);
31f31db1 1795 path_put(&calldata->path);
9512135d
TM		 1796 kfree(calldata);
1797}
1798
88069f77
TM		 1799static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1800 fmode_t fmode)
1801{
1802 spin_lock(&state->owner->so_lock);
1803 if (!(fmode & FMODE_READ))
1804 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1805 if (!(fmode & FMODE_WRITE))
1806 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1807 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1808 spin_unlock(&state->owner->so_lock);
1809}
1810
963d8fe5 1811static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1812{
963d8fe5 1813 struct nfs4_closedata *calldata = data;
1da177e4 1814 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1815 struct nfs_server *server = NFS_SERVER(calldata->inode);
1816
19ddab06 1817 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1818 if (RPC_ASSASSINATED(task))
1819 return;
1da177e4
LT		 1820 /* hmm. we are done with the inode, and in the process of freeing
1821 * the state_owner. we keep this around to process errors
1822 */
1da177e4
LT		 1823 switch (task->tk_status) {
1824 case 0:
45328c35 1825 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1826 renew_lease(server, calldata->timestamp);
88069f77
TM		 1827 nfs4_close_clear_stateid_flags(state,
1828 calldata->arg.fmode);
1da177e4
LT		 1829 break;
1830 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1831 case -NFS4ERR_OLD_STATEID:
1832 case -NFS4ERR_BAD_STATEID:
1da177e4 1833 case -NFS4ERR_EXPIRED:
dc0b027d 1834 if (calldata->arg.fmode == 0)
9e33bed5 1835 break;
1da177e4 1836 default:
9e33bed5 1837 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
0110ee15 1838 nfs_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1839 return;
1840 }
1841 }
516a6af6 1842 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1843}
1844
4ce70ada 1845static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1846{
4ce70ada 1847 struct nfs4_closedata *calldata = data;
9512135d 1848 struct nfs4_state *state = calldata->state;
88069f77 1849 int call_close = 0;
9512135d 1850
963d8fe5 1851 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1852 return;
003707c7 1853
88069f77
TM		 1854 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1855 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1856 spin_lock(&state->owner->so_lock);
003707c7 1857 /* Calculate the change in open mode */
e7616923 1858 if (state->n_rdwr == 0) {
003707c7 1859 if (state->n_rdonly == 0) {
88069f77
TM		 1860 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1861 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1862 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1863 }
1864 if (state->n_wronly == 0) {
88069f77
TM		 1865 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1866 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1867 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1868 }
e7616923 1869 }
4cecb76f 1870 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1871
1872 if (!call_close) {
963d8fe5
TM		 1873 /* Note: exit _without_ calling nfs4_close_done */
1874 task->tk_action = NULL;
9512135d
TM		 1875 return;
1876 }
88069f77
TM		 1877
1878 if (calldata->arg.fmode == 0)
1879 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1880
516a6af6 1881 nfs_fattr_init(calldata->res.fattr);
26e976a8 1882 calldata->timestamp = jiffies;
19ddab06
AA		 1883 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1884 &calldata->arg.seq_args, &calldata->res.seq_res,
1885 1, task))
1886 return;
5138fde0 1887 rpc_call_start(task);
1da177e4
LT		 1888}
1889
963d8fe5 1890static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1891 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1892 .rpc_call_done = nfs4_close_done,
1893 .rpc_release = nfs4_free_closedata,
1894};
1895
1da177e4
LT		 1896/*
1897 * It is possible for data to be read/written from a mem-mapped file
1898 * after the sys_close call (which hits the vfs layer as a flush).
1899 * This means that we can't safely call nfsv4 close on a file until
1900 * the inode is cleared. This in turn means that we are not good
1901 * NFSv4 citizens - we do not indicate to the server to update the file's
1902 * share state even when we are done with one of the three share
1903 * stateid's in the inode.
1904 *
1905 * NOTE: Caller must be holding the sp->so_owner semaphore!
1906 */
a49c3c77 1907int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1908{
4a35bd41 1909 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1910 struct nfs4_closedata *calldata;
b39e625b
TM		 1911 struct nfs4_state_owner *sp = state->owner;
1912 struct rpc_task *task;
5138fde0
TM		 1913 struct rpc_message msg = {
1914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1915 .rpc_cred = state->owner->so_cred,
1916 };
c970aa85
TM		 1917 struct rpc_task_setup task_setup_data = {
1918 .rpc_client = server->client,
5138fde0 1919 .rpc_message = &msg,
c970aa85 1920 .callback_ops = &nfs4_close_ops,
101070ca 1921 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1922 .flags = RPC_TASK_ASYNC,
1923 };
9512135d 1924 int status = -ENOMEM;
1da177e4 1925
19ddab06 1926 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1927 if (calldata == NULL)
9512135d 1928 goto out;
4a35bd41 1929 calldata->inode = state->inode;
1da177e4 1930 calldata->state = state;
4a35bd41 1931 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1932 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1933 if (nfs4_has_session(server->nfs_client))
1934 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1935 /* Serialization for the sequence id */
cee54fc9 1936 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1937 if (calldata->arg.seqid == NULL)
1938 goto out_free_calldata;
dc0b027d 1939 calldata->arg.fmode = 0;
a65318bf 1940 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1941 calldata->res.fattr = &calldata->fattr;
c1d51931 1942 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1943 calldata->res.server = server;
5f7dbd5c 1944 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1945 calldata->path.mnt = mntget(path->mnt);
1946 calldata->path.dentry = dget(path->dentry);
9512135d 1947
5138fde0
TM		 1948 msg.rpc_argp = &calldata->arg,
1949 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1950 task_setup_data.callback_data = calldata;
1951 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1952 if (IS_ERR(task))
1953 return PTR_ERR(task);
a49c3c77
TM		 1954 status = 0;
1955 if (wait)
1956 status = rpc_wait_for_completion_task(task);
b39e625b 1957 rpc_put_task(task);
a49c3c77 1958 return status;
9512135d
TM		 1959out_free_calldata:
1960 kfree(calldata);
1961out:
b39e625b
TM		 1962 nfs4_put_open_state(state);
1963 nfs4_put_state_owner(sp);
9512135d 1964 return status;
1da177e4
LT		 1965}
1966
dc0b027d 1967static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1968{
1969 struct file *filp;
1b45c46c 1970 int ret;
02a913a7 1971
1b45c46c 1972 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1973 if (fmode & FMODE_EXEC) {
af22f94a 1974 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1975 state->owner->so_cred,
1976 nd->intent.open.flags);
1977 if (ret < 0)
1978 goto out_close;
1979 }
4a35bd41 1980 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1981 if (!IS_ERR(filp)) {
1982 struct nfs_open_context *ctx;
cd3758e3 1983 ctx = nfs_file_open_context(filp);
02a913a7 1984 ctx->state = state;
95cf959b
TM		 1985 return 0;
1986 }
1b45c46c
TM		 1987 ret = PTR_ERR(filp);
1988out_close:
dc0b027d 1989 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1990 return ret;
02a913a7
TM		 1991}
1992
1993struct dentry *
1da177e4
LT		 1994nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1995{
ad389da7 1996 struct path path = {
4ac91378 1997 .mnt = nd->path.mnt,
ad389da7
TM		 1998 .dentry = dentry,
1999 };
4ac91378 2000 struct dentry *parent;
1da177e4
LT		 2001 struct iattr attr;
2002 struct rpc_cred *cred;
2003 struct nfs4_state *state;
02a913a7 2004 struct dentry *res;
dc0b027d 2005 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2006
2007 if (nd->flags & LOOKUP_CREATE) {
2008 attr.ia_mode = nd->intent.open.create_mode;
2009 attr.ia_valid = ATTR_MODE;
2010 if (!IS_POSIXACL(dir))
ce3b0f8d 2011 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2012 } else {
2013 attr.ia_valid = 0;
2014 BUG_ON(nd->intent.open.flags & O_CREAT);
2015 }
2016
98a8e323 2017 cred = rpc_lookup_cred();
1da177e4 2018 if (IS_ERR(cred))
02a913a7 2019 return (struct dentry *)cred;
565277f6
TM		 2020 parent = dentry->d_parent;
2021 /* Protect against concurrent sillydeletes */
2022 nfs_block_sillyrename(parent);
dc0b027d 2023 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2024 put_rpccred(cred);
02a913a7 2025 if (IS_ERR(state)) {
d75340cc 2026 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2027 d_add(dentry, NULL);
d75340cc
TM		 2028 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2029 }
565277f6 2030 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2031 return (struct dentry *)state;
2032 }
24ac23ab 2033 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2034 if (res != NULL)
deee9369 2035 path.dentry = res;
d75340cc 2036 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2037 nfs_unblock_sillyrename(parent);
dc0b027d 2038 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2039 return res;
1da177e4
LT		 2040}
2041
2042int
02a913a7 2043nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2044{
ad389da7 2045 struct path path = {
4ac91378 2046 .mnt = nd->path.mnt,
ad389da7
TM		 2047 .dentry = dentry,
2048 };
1da177e4
LT		 2049 struct rpc_cred *cred;
2050 struct nfs4_state *state;
dc0b027d 2051 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2052
98a8e323 2053 cred = rpc_lookup_cred();
1da177e4
LT		 2054 if (IS_ERR(cred))
2055 return PTR_ERR(cred);
dc0b027d 2056 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2057 put_rpccred(cred);
02a913a7
TM		 2058 if (IS_ERR(state)) {
2059 switch (PTR_ERR(state)) {
2060 case -EPERM:
2061 case -EACCES:
2062 case -EDQUOT:
2063 case -ENOSPC:
2064 case -EROFS:
2065 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2066 return 1;
b87c0adf
CL		 2067 default:
2068 goto out_drop;
02a913a7 2069 }
02a913a7 2070 }
24ac23ab 2071 if (state->inode == dentry->d_inode) {
d75340cc 2072 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2073 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2074 return 1;
2075 }
dc0b027d 2076 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2077out_drop:
2078 d_drop(dentry);
1da177e4
LT		 2079 return 0;
2080}
2081
1185a552 2082static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2083{
2084 if (ctx->state == NULL)
2085 return;
2086 if (is_sync)
2087 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2088 else
2089 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2090}
1da177e4
LT		 2091
2092static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2093{
43652ad5
BH		 2094 struct nfs4_server_caps_arg args = {
2095 .fhandle = fhandle,
2096 };
1da177e4
LT		 2097 struct nfs4_server_caps_res res = {};
2098 struct rpc_message msg = {
2099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2100 .rpc_argp = &args,
1da177e4
LT		 2101 .rpc_resp = &res,
2102 };
2103 int status;
2104
cccef3b9 2105 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2106 if (status == 0) {
2107 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2108 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2109 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2110 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2111 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2112 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2113 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2114 server->caps |= NFS_CAP_ACLS;
2115 if (res.has_links != 0)
2116 server->caps |= NFS_CAP_HARDLINKS;
2117 if (res.has_symlinks != 0)
2118 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2119 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2120 server->caps |= NFS_CAP_FILEID;
2121 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2122 server->caps |= NFS_CAP_MODE;
2123 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2124 server->caps |= NFS_CAP_NLINK;
2125 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2126 server->caps |= NFS_CAP_OWNER;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2128 server->caps |= NFS_CAP_OWNER_GROUP;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2130 server->caps |= NFS_CAP_ATIME;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2132 server->caps |= NFS_CAP_CTIME;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2134 server->caps |= NFS_CAP_MTIME;
2135
a65318bf
TM		 2136 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2137 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2138 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2139 server->acl_bitmask = res.acl_bitmask;
2140 }
cccef3b9 2141
1da177e4
LT		 2142 return status;
2143}
2144
55a97593 2145int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2146{
2147 struct nfs4_exception exception = { };
2148 int err;
2149 do {
2150 err = nfs4_handle_exception(server,
2151 _nfs4_server_capabilities(server, fhandle),
2152 &exception);
2153 } while (exception.retry);
2154 return err;
2155}
2156
2157static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2158 struct nfs_fsinfo *info)
2159{
1da177e4
LT		 2160 struct nfs4_lookup_root_arg args = {
2161 .bitmask = nfs4_fattr_bitmap,
2162 };
2163 struct nfs4_lookup_res res = {
2164 .server = server,
0e574af1 2165 .fattr = info->fattr,
1da177e4
LT		 2166 .fh = fhandle,
2167 };
2168 struct rpc_message msg = {
2169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2170 .rpc_argp = &args,
2171 .rpc_resp = &res,
2172 };
008f55d0 2173
0e574af1 2174 nfs_fattr_init(info->fattr);
fccba804 2175 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2176}
2177
2178static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2179 struct nfs_fsinfo *info)
2180{
2181 struct nfs4_exception exception = { };
2182 int err;
2183 do {
2184 err = nfs4_handle_exception(server,
2185 _nfs4_lookup_root(server, fhandle, info),
2186 &exception);
2187 } while (exception.retry);
2188 return err;
2189}
2190
54ceac45
DH		 2191/*
2192 * get the file handle for the "/" directory on the server
2193 */
1da177e4 2194static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2195 struct nfs_fsinfo *info)
1da177e4 2196{
1da177e4
LT		 2197 int status;
2198
1da177e4 2199 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2200 if (status == 0)
2201 status = nfs4_server_capabilities(server, fhandle);
2202 if (status == 0)
2203 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2204 return nfs4_map_errors(status);
1da177e4
LT		 2205}
2206
6b97fd3d
MN		 2207/*
2208 * Get locations and (maybe) other attributes of a referral.
2209 * Note that we'll actually follow the referral later when
2210 * we detect fsid mismatch in inode revalidation
2211 */
56659e99 2212static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2213{
2214 int status = -ENOMEM;
2215 struct page *page = NULL;
2216 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2217
2218 page = alloc_page(GFP_KERNEL);
2219 if (page == NULL)
2220 goto out;
2221 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2222 if (locations == NULL)
2223 goto out;
2224
c228fd3a 2225 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2226 if (status != 0)
2227 goto out;
2228 /* Make sure server returned a different fsid for the referral */
2229 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2230 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2231 status = -EIO;
2232 goto out;
2233 }
2234
2235 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2236 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2237 if (!fattr->mode)
2238 fattr->mode = S_IFDIR;
2239 memset(fhandle, 0, sizeof(struct nfs_fh));
2240out:
2241 if (page)
2242 __free_page(page);
2243 if (locations)
2244 kfree(locations);
2245 return status;
2246}
2247
1da177e4
LT		 2248static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2249{
2250 struct nfs4_getattr_arg args = {
2251 .fh = fhandle,
2252 .bitmask = server->attr_bitmask,
2253 };
2254 struct nfs4_getattr_res res = {
2255 .fattr = fattr,
2256 .server = server,
2257 };
2258 struct rpc_message msg = {
2259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2260 .rpc_argp = &args,
2261 .rpc_resp = &res,
2262 };
2263
0e574af1 2264 nfs_fattr_init(fattr);
cccef3b9 2265 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2266}
2267
2268static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2269{
2270 struct nfs4_exception exception = { };
2271 int err;
2272 do {
2273 err = nfs4_handle_exception(server,
2274 _nfs4_proc_getattr(server, fhandle, fattr),
2275 &exception);
2276 } while (exception.retry);
2277 return err;
2278}
2279
2280/*
2281 * The file is not closed if it is opened due to the a request to change
2282 * the size of the file. The open call will not be needed once the
2283 * VFS layer lookup-intents are implemented.
2284 *
2285 * Close is called when the inode is destroyed.
2286 * If we haven't opened the file for O_WRONLY, we
2287 * need to in the size_change case to obtain a stateid.
2288 *
2289 * Got race?
2290 * Because OPEN is always done by name in nfsv4, it is
2291 * possible that we opened a different file by the same
2292 * name. We can recognize this race condition, but we
2293 * can't do anything about it besides returning an error.
2294 *
2295 * This will be fixed with VFS changes (lookup-intent).
2296 */
2297static int
2298nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2299 struct iattr *sattr)
2300{
08e9eac4 2301 struct inode *inode = dentry->d_inode;
659bfcd6 2302 struct rpc_cred *cred = NULL;
d530838b 2303 struct nfs4_state *state = NULL;
1da177e4
LT		 2304 int status;
2305
0e574af1 2306 nfs_fattr_init(fattr);
1da177e4 2307
d530838b 2308 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2309 if (sattr->ia_valid & ATTR_FILE) {
2310 struct nfs_open_context *ctx;
2311
2312 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2313 if (ctx) {
2314 cred = ctx->cred;
2315 state = ctx->state;
2316 }
659bfcd6 2317 }
08e9eac4 2318
659bfcd6 2319 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2320 if (status == 0)
2321 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2322 return status;
2323}
2324
56659e99
TM		 2325static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2326 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2327 struct nfs_fattr *fattr)
2328{
2329 int status;
2330 struct nfs4_lookup_arg args = {
2331 .bitmask = server->attr_bitmask,
2332 .dir_fh = dirfh,
2333 .name = name,
2334 };
2335 struct nfs4_lookup_res res = {
2336 .server = server,
2337 .fattr = fattr,
2338 .fh = fhandle,
2339 };
2340 struct rpc_message msg = {
2341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2342 .rpc_argp = &args,
2343 .rpc_resp = &res,
2344 };
2345
2346 nfs_fattr_init(fattr);
2347
2348 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2349 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2350 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2351 return status;
2352}
2353
2354static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2355 struct qstr *name, struct nfs_fh *fhandle,
2356 struct nfs_fattr *fattr)
2357{
2358 struct nfs4_exception exception = { };
2359 int err;
2360 do {
4e56e082
TM		 2361 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2362 /* FIXME: !!!! */
2363 if (err == -NFS4ERR_MOVED) {
2364 err = -EREMOTE;
2365 break;
2366 }
2367 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2368 } while (exception.retry);
2369 return err;
2370}
2371
56659e99 2372static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2373 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2374{
4e56e082 2375 int status;
1da177e4
LT		 2376
2377 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2378 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2379 if (status == -NFS4ERR_MOVED)
2380 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2381 dprintk("NFS reply lookup: %d\n", status);
2382 return status;
2383}
2384
2385static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2386{
2387 struct nfs4_exception exception = { };
2388 int err;
2389 do {
2390 err = nfs4_handle_exception(NFS_SERVER(dir),
2391 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2392 &exception);
2393 } while (exception.retry);
2394 return err;
2395}
2396
2397static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2398{
76b32999
TM		 2399 struct nfs_server *server = NFS_SERVER(inode);
2400 struct nfs_fattr fattr;
1da177e4
LT		 2401 struct nfs4_accessargs args = {
2402 .fh = NFS_FH(inode),
76b32999
TM		 2403 .bitmask = server->attr_bitmask,
2404 };
2405 struct nfs4_accessres res = {
2406 .server = server,
2407 .fattr = &fattr,
1da177e4 2408 };
1da177e4
LT		 2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2411 .rpc_argp = &args,
2412 .rpc_resp = &res,
2413 .rpc_cred = entry->cred,
2414 };
2415 int mode = entry->mask;
2416 int status;
2417
2418 /*
2419 * Determine which access bits we want to ask for...
2420 */
2421 if (mode & MAY_READ)
2422 args.access |= NFS4_ACCESS_READ;
2423 if (S_ISDIR(inode->i_mode)) {
2424 if (mode & MAY_WRITE)
2425 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2426 if (mode & MAY_EXEC)
2427 args.access |= NFS4_ACCESS_LOOKUP;
2428 } else {
2429 if (mode & MAY_WRITE)
2430 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2431 if (mode & MAY_EXEC)
2432 args.access |= NFS4_ACCESS_EXECUTE;
2433 }
76b32999 2434 nfs_fattr_init(&fattr);
cccef3b9 2435 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2436 if (!status) {
2437 entry->mask = 0;
2438 if (res.access & NFS4_ACCESS_READ)
2439 entry->mask |= MAY_READ;
2440 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2441 entry->mask |= MAY_WRITE;
2442 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2443 entry->mask |= MAY_EXEC;
76b32999 2444 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2445 }
2446 return status;
2447}
2448
2449static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2450{
2451 struct nfs4_exception exception = { };
2452 int err;
2453 do {
2454 err = nfs4_handle_exception(NFS_SERVER(inode),
2455 _nfs4_proc_access(inode, entry),
2456 &exception);
2457 } while (exception.retry);
2458 return err;
2459}
2460
2461/*
2462 * TODO: For the time being, we don't try to get any attributes
2463 * along with any of the zero-copy operations READ, READDIR,
2464 * READLINK, WRITE.
2465 *
2466 * In the case of the first three, we want to put the GETATTR
2467 * after the read-type operation -- this is because it is hard
2468 * to predict the length of a GETATTR response in v4, and thus
2469 * align the READ data correctly. This means that the GETATTR
2470 * may end up partially falling into the page cache, and we should
2471 * shift it into the 'tail' of the xdr_buf before processing.
2472 * To do this efficiently, we need to know the total length
2473 * of data received, which doesn't seem to be available outside
2474 * of the RPC layer.
2475 *
2476 * In the case of WRITE, we also want to put the GETATTR after
2477 * the operation -- in this case because we want to make sure
2478 * we get the post-operation mtime and size. This means that
2479 * we can't use xdr_encode_pages() as written: we need a variant
2480 * of it which would leave room in the 'tail' iovec.
2481 *
2482 * Both of these changes to the XDR layer would in fact be quite
2483 * minor, but I decided to leave them for a subsequent patch.
2484 */
2485static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2486 unsigned int pgbase, unsigned int pglen)
2487{
2488 struct nfs4_readlink args = {
2489 .fh = NFS_FH(inode),
2490 .pgbase = pgbase,
2491 .pglen = pglen,
2492 .pages = &page,
2493 };
f50c7000 2494 struct nfs4_readlink_res res;
1da177e4
LT		 2495 struct rpc_message msg = {
2496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2497 .rpc_argp = &args,
f50c7000 2498 .rpc_resp = &res,
1da177e4
LT		 2499 };
2500
cccef3b9 2501 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2502}
2503
2504static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2505 unsigned int pgbase, unsigned int pglen)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 err = nfs4_handle_exception(NFS_SERVER(inode),
2511 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2512 &exception);
2513 } while (exception.retry);
2514 return err;
2515}
2516
1da177e4
LT		 2517/*
2518 * Got race?
2519 * We will need to arrange for the VFS layer to provide an atomic open.
2520 * Until then, this create/open method is prone to inefficiency and race
2521 * conditions due to the lookup, create, and open VFS calls from sys_open()
2522 * placed on the wire.
2523 *
2524 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2525 * The file will be opened again in the subsequent VFS open call
2526 * (nfs4_proc_file_open).
2527 *
2528 * The open for read will just hang around to be used by any process that
2529 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2530 */
2531
2532static int
2533nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2534 int flags, struct nameidata *nd)
1da177e4 2535{
ad389da7 2536 struct path path = {
4ac91378 2537 .mnt = nd->path.mnt,
ad389da7
TM		 2538 .dentry = dentry,
2539 };
1da177e4
LT		 2540 struct nfs4_state *state;
2541 struct rpc_cred *cred;
dc0b027d 2542 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2543 int status = 0;
2544
98a8e323 2545 cred = rpc_lookup_cred();
1da177e4
LT		 2546 if (IS_ERR(cred)) {
2547 status = PTR_ERR(cred);
2548 goto out;
2549 }
dc0b027d 2550 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2551 d_drop(dentry);
1da177e4
LT		 2552 if (IS_ERR(state)) {
2553 status = PTR_ERR(state);
659bfcd6 2554 goto out_putcred;
1da177e4 2555 }
d4d9cdcb 2556 d_add(dentry, igrab(state->inode));
d75340cc 2557 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2558 if (flags & O_EXCL) {
2559 struct nfs_fattr fattr;
659bfcd6 2560 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2561 if (status == 0)
65e4308d 2562 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2563 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2564 }
ad389da7 2565 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2566 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2567 else
dc0b027d 2568 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2569out_putcred:
2570 put_rpccred(cred);
1da177e4
LT		 2571out:
2572 return status;
2573}
2574
2575static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2576{
16e42959 2577 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2578 struct nfs_removeargs args = {
1da177e4 2579 .fh = NFS_FH(dir),
4fdc17b2
TM		 2580 .name.len = name->len,
2581 .name.name = name->name,
16e42959
TM		 2582 .bitmask = server->attr_bitmask,
2583 };
4fdc17b2 2584 struct nfs_removeres res = {
16e42959 2585 .server = server,
1da177e4 2586 };
1da177e4 2587 struct rpc_message msg = {
4fdc17b2
TM		 2588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2589 .rpc_argp = &args,
2590 .rpc_resp = &res,
1da177e4
LT		 2591 };
2592 int status;
2593
4fdc17b2 2594 nfs_fattr_init(&res.dir_attr);
cccef3b9 2595 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2596 if (status == 0) {
2597 update_changeattr(dir, &res.cinfo);
4fdc17b2 2598 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2599 }
1da177e4
LT		 2600 return status;
2601}
2602
2603static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2604{
2605 struct nfs4_exception exception = { };
2606 int err;
2607 do {
2608 err = nfs4_handle_exception(NFS_SERVER(dir),
2609 _nfs4_proc_remove(dir, name),
2610 &exception);
2611 } while (exception.retry);
2612 return err;
2613}
2614
e4eff1a6 2615static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2616{
e4eff1a6
TM		 2617 struct nfs_server *server = NFS_SERVER(dir);
2618 struct nfs_removeargs *args = msg->rpc_argp;
2619 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2620
a65318bf 2621 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2622 res->server = server;
1da177e4 2623 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2624}
2625
e4eff1a6 2626static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2627{
e4eff1a6
TM		 2628 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2629
472cfbd9 2630 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2631 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2632 return 0;
2633 update_changeattr(dir, &res->cinfo);
2634 nfs_post_op_update_inode(dir, &res->dir_attr);
2635 return 1;
1da177e4
LT		 2636}
2637
2638static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2639 struct inode *new_dir, struct qstr *new_name)
2640{
6caf2c82 2641 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2642 struct nfs4_rename_arg arg = {
2643 .old_dir = NFS_FH(old_dir),
2644 .new_dir = NFS_FH(new_dir),
2645 .old_name = old_name,
2646 .new_name = new_name,
6caf2c82
TM		 2647 .bitmask = server->attr_bitmask,
2648 };
2649 struct nfs_fattr old_fattr, new_fattr;
2650 struct nfs4_rename_res res = {
2651 .server = server,
2652 .old_fattr = &old_fattr,
2653 .new_fattr = &new_fattr,
1da177e4 2654 };
1da177e4
LT		 2655 struct rpc_message msg = {
2656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2657 .rpc_argp = &arg,
2658 .rpc_resp = &res,
2659 };
2660 int status;
2661
6caf2c82
TM		 2662 nfs_fattr_init(res.old_fattr);
2663 nfs_fattr_init(res.new_fattr);
cccef3b9 2664 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2665
2666 if (!status) {
2667 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2668 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2669 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2670 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2671 }
2672 return status;
2673}
2674
2675static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2676 struct inode *new_dir, struct qstr *new_name)
2677{
2678 struct nfs4_exception exception = { };
2679 int err;
2680 do {
2681 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2682 _nfs4_proc_rename(old_dir, old_name,
2683 new_dir, new_name),
2684 &exception);
2685 } while (exception.retry);
2686 return err;
2687}
2688
2689static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2690{
91ba2eee 2691 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2692 struct nfs4_link_arg arg = {
2693 .fh = NFS_FH(inode),
2694 .dir_fh = NFS_FH(dir),
2695 .name = name,
91ba2eee
TM		 2696 .bitmask = server->attr_bitmask,
2697 };
2698 struct nfs_fattr fattr, dir_attr;
2699 struct nfs4_link_res res = {
2700 .server = server,
2701 .fattr = &fattr,
2702 .dir_attr = &dir_attr,
1da177e4 2703 };
1da177e4
LT		 2704 struct rpc_message msg = {
2705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2706 .rpc_argp = &arg,
91ba2eee 2707 .rpc_resp = &res,
1da177e4
LT		 2708 };
2709 int status;
2710
91ba2eee
TM		 2711 nfs_fattr_init(res.fattr);
2712 nfs_fattr_init(res.dir_attr);
cccef3b9 2713 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2714 if (!status) {
2715 update_changeattr(dir, &res.cinfo);
2716 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2717 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2718 }
1da177e4
LT		 2719
2720 return status;
2721}
2722
2723static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2724{
2725 struct nfs4_exception exception = { };
2726 int err;
2727 do {
2728 err = nfs4_handle_exception(NFS_SERVER(inode),
2729 _nfs4_proc_link(inode, dir, name),
2730 &exception);
2731 } while (exception.retry);
2732 return err;
2733}
2734
57dc9a57
TM		 2735struct nfs4_createdata {
2736 struct rpc_message msg;
2737 struct nfs4_create_arg arg;
2738 struct nfs4_create_res res;
2739 struct nfs_fh fh;
2740 struct nfs_fattr fattr;
2741 struct nfs_fattr dir_fattr;
2742};
2743
2744static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2745 struct qstr *name, struct iattr *sattr, u32 ftype)
2746{
2747 struct nfs4_createdata *data;
2748
2749 data = kzalloc(sizeof(*data), GFP_KERNEL);
2750 if (data != NULL) {
2751 struct nfs_server *server = NFS_SERVER(dir);
2752
2753 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2754 data->msg.rpc_argp = &data->arg;
2755 data->msg.rpc_resp = &data->res;
2756 data->arg.dir_fh = NFS_FH(dir);
2757 data->arg.server = server;
2758 data->arg.name = name;
2759 data->arg.attrs = sattr;
2760 data->arg.ftype = ftype;
2761 data->arg.bitmask = server->attr_bitmask;
2762 data->res.server = server;
2763 data->res.fh = &data->fh;
2764 data->res.fattr = &data->fattr;
2765 data->res.dir_fattr = &data->dir_fattr;
2766 nfs_fattr_init(data->res.fattr);
2767 nfs_fattr_init(data->res.dir_fattr);
2768 }
2769 return data;
2770}
2771
2772static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2773{
cccef3b9
AA		 2774 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2775 &data->arg, &data->res, 1);
57dc9a57
TM		 2776 if (status == 0) {
2777 update_changeattr(dir, &data->res.dir_cinfo);
2778 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2779 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2780 }
2781 return status;
2782}
2783
2784static void nfs4_free_createdata(struct nfs4_createdata *data)
2785{
2786 kfree(data);
2787}
2788
4f390c15 2789static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2790 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2791{
57dc9a57
TM		 2792 struct nfs4_createdata *data;
2793 int status = -ENAMETOOLONG;
1da177e4 2794
94a6d753 2795 if (len > NFS4_MAXPATHLEN)
57dc9a57 2796 goto out;
4f390c15 2797
57dc9a57
TM		 2798 status = -ENOMEM;
2799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2800 if (data == NULL)
2801 goto out;
2802
2803 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2804 data->arg.u.symlink.pages = &page;
2805 data->arg.u.symlink.len = len;
1da177e4 2806
57dc9a57
TM		 2807 status = nfs4_do_create(dir, dentry, data);
2808
2809 nfs4_free_createdata(data);
2810out:
1da177e4
LT		 2811 return status;
2812}
2813
4f390c15 2814static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2815 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
2820 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2821 _nfs4_proc_symlink(dir, dentry, page,
2822 len, sattr),
1da177e4
LT		 2823 &exception);
2824 } while (exception.retry);
2825 return err;
2826}
2827
2828static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2829 struct iattr *sattr)
2830{
57dc9a57
TM		 2831 struct nfs4_createdata *data;
2832 int status = -ENOMEM;
1da177e4 2833
57dc9a57
TM		 2834 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2835 if (data == NULL)
2836 goto out;
2837
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_mkdir(struct inode *dir, struct dentry *dentry,
2846 struct iattr *sattr)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(NFS_SERVER(dir),
2852 _nfs4_proc_mkdir(dir, dentry, sattr),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
2858static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2859 u64 cookie, struct page *page, unsigned int count, int plus)
2860{
2861 struct inode *dir = dentry->d_inode;
2862 struct nfs4_readdir_arg args = {
2863 .fh = NFS_FH(dir),
2864 .pages = &page,
2865 .pgbase = 0,
2866 .count = count,
96d25e53 2867 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2868 };
2869 struct nfs4_readdir_res res;
2870 struct rpc_message msg = {
2871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2872 .rpc_argp = &args,
2873 .rpc_resp = &res,
2874 .rpc_cred = cred,
2875 };
2876 int status;
2877
3110ff80 2878 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2879 dentry->d_parent->d_name.name,
2880 dentry->d_name.name,
2881 (unsigned long long)cookie);
1da177e4
LT		 2882 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2883 res.pgbase = args.pgbase;
cccef3b9 2884 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2885 if (status == 0)
2886 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2887
2888 nfs_invalidate_atime(dir);
2889
3110ff80 2890 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2891 return status;
2892}
2893
2894static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2895 u64 cookie, struct page *page, unsigned int count, int plus)
2896{
2897 struct nfs4_exception exception = { };
2898 int err;
2899 do {
2900 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2901 _nfs4_proc_readdir(dentry, cred, cookie,
2902 page, count, plus),
2903 &exception);
2904 } while (exception.retry);
2905 return err;
2906}
2907
2908static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2909 struct iattr *sattr, dev_t rdev)
2910{
57dc9a57
TM		 2911 struct nfs4_createdata *data;
2912 int mode = sattr->ia_mode;
2913 int status = -ENOMEM;
1da177e4
LT		 2914
2915 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2916 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2917
2918 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2919 if (data == NULL)
2920 goto out;
2921
1da177e4 2922 if (S_ISFIFO(mode))
57dc9a57 2923 data->arg.ftype = NF4FIFO;
1da177e4 2924 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2925 data->arg.ftype = NF4BLK;
2926 data->arg.u.device.specdata1 = MAJOR(rdev);
2927 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2928 }
2929 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2930 data->arg.ftype = NF4CHR;
2931 data->arg.u.device.specdata1 = MAJOR(rdev);
2932 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2933 }
1da177e4 2934
57dc9a57
TM		 2935 status = nfs4_do_create(dir, dentry, data);
2936
2937 nfs4_free_createdata(data);
2938out:
1da177e4
LT		 2939 return status;
2940}
2941
2942static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2943 struct iattr *sattr, dev_t rdev)
2944{
2945 struct nfs4_exception exception = { };
2946 int err;
2947 do {
2948 err = nfs4_handle_exception(NFS_SERVER(dir),
2949 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2950 &exception);
2951 } while (exception.retry);
2952 return err;
2953}
2954
2955static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_fsstat *fsstat)
2957{
2958 struct nfs4_statfs_arg args = {
2959 .fh = fhandle,
2960 .bitmask = server->attr_bitmask,
2961 };
24ad148a
BH		 2962 struct nfs4_statfs_res res = {
2963 .fsstat = fsstat,
2964 };
1da177e4
LT		 2965 struct rpc_message msg = {
2966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2967 .rpc_argp = &args,
24ad148a 2968 .rpc_resp = &res,
1da177e4
LT		 2969 };
2970
0e574af1 2971 nfs_fattr_init(fsstat->fattr);
cccef3b9 2972 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2973}
2974
2975static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2976{
2977 struct nfs4_exception exception = { };
2978 int err;
2979 do {
2980 err = nfs4_handle_exception(server,
2981 _nfs4_proc_statfs(server, fhandle, fsstat),
2982 &exception);
2983 } while (exception.retry);
2984 return err;
2985}
2986
2987static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2988 struct nfs_fsinfo *fsinfo)
2989{
2990 struct nfs4_fsinfo_arg args = {
2991 .fh = fhandle,
2992 .bitmask = server->attr_bitmask,
2993 };
3dda5e43
BH		 2994 struct nfs4_fsinfo_res res = {
2995 .fsinfo = fsinfo,
2996 };
1da177e4
LT		 2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2999 .rpc_argp = &args,
3dda5e43 3000 .rpc_resp = &res,
1da177e4
LT		 3001 };
3002
cccef3b9 3003 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3004}
3005
3006static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3007{
3008 struct nfs4_exception exception = { };
3009 int err;
3010
3011 do {
3012 err = nfs4_handle_exception(server,
3013 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3014 &exception);
3015 } while (exception.retry);
3016 return err;
3017}
3018
3019static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3020{
0e574af1 3021 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3022 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3023}
3024
3025static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3026 struct nfs_pathconf *pathconf)
3027{
3028 struct nfs4_pathconf_arg args = {
3029 .fh = fhandle,
3030 .bitmask = server->attr_bitmask,
3031 };
d45b2989
BH		 3032 struct nfs4_pathconf_res res = {
3033 .pathconf = pathconf,
3034 };
1da177e4
LT		 3035 struct rpc_message msg = {
3036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3037 .rpc_argp = &args,
d45b2989 3038 .rpc_resp = &res,
1da177e4
LT		 3039 };
3040
3041 /* None of the pathconf attributes are mandatory to implement */
3042 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3043 memset(pathconf, 0, sizeof(*pathconf));
3044 return 0;
3045 }
3046
0e574af1 3047 nfs_fattr_init(pathconf->fattr);
cccef3b9 3048 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3049}
3050
3051static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3052 struct nfs_pathconf *pathconf)
3053{
3054 struct nfs4_exception exception = { };
3055 int err;
3056
3057 do {
3058 err = nfs4_handle_exception(server,
3059 _nfs4_proc_pathconf(server, fhandle, pathconf),
3060 &exception);
3061 } while (exception.retry);
3062 return err;
3063}
3064
ec06c096 3065static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3066{
ec06c096 3067 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3068
f11c88af
AA		 3069 dprintk("--> %s\n", __func__);
3070
f11c88af
AA		 3071 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3072
9e33bed5 3073 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3074 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3075 return -EAGAIN;
1da177e4 3076 }
8850df99
TM		 3077
3078 nfs_invalidate_atime(data->inode);
1da177e4 3079 if (task->tk_status > 0)
ec06c096
TM		 3080 renew_lease(server, data->timestamp);
3081 return 0;
1da177e4
LT		 3082}
3083
bdc7f021 3084static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3085{
1da177e4 3086 data->timestamp = jiffies;
bdc7f021 3087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3088}
3089
788e7a89 3090static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3091{
1da177e4
LT		 3092 struct inode *inode = data->inode;
3093
def6ed7e
AA		 3094 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3095 task->tk_status);
3096
9e33bed5 3097 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3098 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3099 return -EAGAIN;
1da177e4 3100 }
4f9838c7 3101 if (task->tk_status >= 0) {
1da177e4 3102 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3103 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3104 }
788e7a89 3105 return 0;
1da177e4
LT		 3106}
3107
bdc7f021 3108static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3109{
bdc7f021
TM		 3110 struct nfs_server *server = NFS_SERVER(data->inode);
3111
a65318bf 3112 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3113 data->res.server = server;
1da177e4
LT		 3114 data->timestamp = jiffies;
3115
bdc7f021 3116 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3117}
3118
788e7a89 3119static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3120{
1da177e4
LT		 3121 struct inode *inode = data->inode;
3122
21d9a851
AA		 3123 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3124 task->tk_status);
9e33bed5 3125 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3126 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3127 return -EAGAIN;
1da177e4 3128 }
9e08a3c5 3129 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3130 return 0;
1da177e4
LT		 3131}
3132
bdc7f021 3133static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3134{
788e7a89 3135 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3136
a65318bf 3137 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3138 data->res.server = server;
bdc7f021 3139 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3140}
3141
3142/*
3143 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3144 * standalone procedure for queueing an asynchronous RENEW.
3145 */
963d8fe5 3146static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3147{
adfa6f98 3148 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3149 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3150
3151 if (task->tk_status < 0) {
95baa25c
TM		 3152 /* Unless we're shutting down, schedule state recovery! */
3153 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3154 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3155 return;
3156 }
3157 spin_lock(&clp->cl_lock);
3158 if (time_before(clp->cl_last_renewal,timestamp))
3159 clp->cl_last_renewal = timestamp;
3160 spin_unlock(&clp->cl_lock);
3161}
3162
963d8fe5
TM		 3163static const struct rpc_call_ops nfs4_renew_ops = {
3164 .rpc_call_done = nfs4_renew_done,
3165};
3166
adfa6f98 3167int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3168{
3169 struct rpc_message msg = {
3170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3171 .rpc_argp = clp,
b4454fe1 3172 .rpc_cred = cred,
1da177e4
LT		 3173 };
3174
3175 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3176 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3177}
3178
adfa6f98 3179int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3180{
3181 struct rpc_message msg = {
3182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3183 .rpc_argp = clp,
b4454fe1 3184 .rpc_cred = cred,
1da177e4
LT		 3185 };
3186 unsigned long now = jiffies;
3187 int status;
3188
3189 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3190 if (status < 0)
3191 return status;
3192 spin_lock(&clp->cl_lock);
3193 if (time_before(clp->cl_last_renewal,now))
3194 clp->cl_last_renewal = now;
3195 spin_unlock(&clp->cl_lock);
3196 return 0;
3197}
3198
aa1870af
BF		 3199static inline int nfs4_server_supports_acls(struct nfs_server *server)
3200{
3201 return (server->caps & NFS_CAP_ACLS)
3202 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3203 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3204}
3205
3206/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3207 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3208 * the stack.
3209 */
3210#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3211
3212static void buf_to_pages(const void *buf, size_t buflen,
3213 struct page **pages, unsigned int *pgbase)
3214{
3215 const void *p = buf;
3216
3217 *pgbase = offset_in_page(buf);
3218 p -= *pgbase;
3219 while (p < buf + buflen) {
3220 *(pages++) = virt_to_page(p);
3221 p += PAGE_CACHE_SIZE;
3222 }
3223}
3224
e50a1c2e
BF		 3225struct nfs4_cached_acl {
3226 int cached;
3227 size_t len;
3e9d4154 3228 char data[0];
e50a1c2e
BF		 3229};
3230
3231static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3232{
3233 struct nfs_inode *nfsi = NFS_I(inode);
3234
3235 spin_lock(&inode->i_lock);
3236 kfree(nfsi->nfs4_acl);
3237 nfsi->nfs4_acl = acl;
3238 spin_unlock(&inode->i_lock);
3239}
3240
3241static void nfs4_zap_acl_attr(struct inode *inode)
3242{
3243 nfs4_set_cached_acl(inode, NULL);
3244}
3245
3246static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3247{
3248 struct nfs_inode *nfsi = NFS_I(inode);
3249 struct nfs4_cached_acl *acl;
3250 int ret = -ENOENT;
3251
3252 spin_lock(&inode->i_lock);
3253 acl = nfsi->nfs4_acl;
3254 if (acl == NULL)
3255 goto out;
3256 if (buf == NULL) /* user is just asking for length */
3257 goto out_len;
3258 if (acl->cached == 0)
3259 goto out;
3260 ret = -ERANGE; /* see getxattr(2) man page */
3261 if (acl->len > buflen)
3262 goto out;
3263 memcpy(buf, acl->data, acl->len);
3264out_len:
3265 ret = acl->len;
3266out:
3267 spin_unlock(&inode->i_lock);
3268 return ret;
3269}
3270
3271static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3272{
3273 struct nfs4_cached_acl *acl;
3274
3275 if (buf && acl_len <= PAGE_SIZE) {
3276 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3277 if (acl == NULL)
3278 goto out;
3279 acl->cached = 1;
3280 memcpy(acl->data, buf, acl_len);
3281 } else {
3282 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3283 if (acl == NULL)
3284 goto out;
3285 acl->cached = 0;
3286 }
3287 acl->len = acl_len;
3288out:
3289 nfs4_set_cached_acl(inode, acl);
3290}
3291
16b4289c 3292static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3293{
aa1870af
BF		 3294 struct page *pages[NFS4ACL_MAXPAGES];
3295 struct nfs_getaclargs args = {
3296 .fh = NFS_FH(inode),
3297 .acl_pages = pages,
3298 .acl_len = buflen,
3299 };
663c79b3
BH		 3300 struct nfs_getaclres res = {
3301 .acl_len = buflen,
3302 };
e50a1c2e 3303 void *resp_buf;
aa1870af
BF		 3304 struct rpc_message msg = {
3305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3306 .rpc_argp = &args,
663c79b3 3307 .rpc_resp = &res,
aa1870af 3308 };
e50a1c2e 3309 struct page *localpage = NULL;
aa1870af
BF		 3310 int ret;
3311
e50a1c2e
BF		 3312 if (buflen < PAGE_SIZE) {
3313 /* As long as we're doing a round trip to the server anyway,
3314 * let's be prepared for a page of acl data. */
3315 localpage = alloc_page(GFP_KERNEL);
3316 resp_buf = page_address(localpage);
3317 if (localpage == NULL)
3318 return -ENOMEM;
3319 args.acl_pages[0] = localpage;
3320 args.acl_pgbase = 0;
663c79b3 3321 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3322 } else {
3323 resp_buf = buf;
3324 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3325 }
cccef3b9 3326 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3327 if (ret)
3328 goto out_free;
663c79b3
BH		 3329 if (res.acl_len > args.acl_len)
3330 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3331 else
663c79b3 3332 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3333 if (buf) {
3334 ret = -ERANGE;
663c79b3 3335 if (res.acl_len > buflen)
e50a1c2e
BF		 3336 goto out_free;
3337 if (localpage)
663c79b3 3338 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3339 }
663c79b3 3340 ret = res.acl_len;
e50a1c2e
BF		 3341out_free:
3342 if (localpage)
3343 __free_page(localpage);
aa1870af
BF		 3344 return ret;
3345}
3346
16b4289c
TM		 3347static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3348{
3349 struct nfs4_exception exception = { };
3350 ssize_t ret;
3351 do {
3352 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3353 if (ret >= 0)
3354 break;
3355 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3356 } while (exception.retry);
3357 return ret;
3358}
3359
e50a1c2e
BF		 3360static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3361{
3362 struct nfs_server *server = NFS_SERVER(inode);
3363 int ret;
3364
3365 if (!nfs4_server_supports_acls(server))
3366 return -EOPNOTSUPP;
3367 ret = nfs_revalidate_inode(server, inode);
3368 if (ret < 0)
3369 return ret;
3370 ret = nfs4_read_cached_acl(inode, buf, buflen);
3371 if (ret != -ENOENT)
3372 return ret;
3373 return nfs4_get_acl_uncached(inode, buf, buflen);
3374}
3375
16b4289c 3376static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3377{
3378 struct nfs_server *server = NFS_SERVER(inode);
3379 struct page *pages[NFS4ACL_MAXPAGES];
3380 struct nfs_setaclargs arg = {
3381 .fh = NFS_FH(inode),
3382 .acl_pages = pages,
3383 .acl_len = buflen,
3384 };
73c403a9 3385 struct nfs_setaclres res;
4b580ee3
BF		 3386 struct rpc_message msg = {
3387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3388 .rpc_argp = &arg,
73c403a9 3389 .rpc_resp = &res,
4b580ee3
BF		 3390 };
3391 int ret;
3392
3393 if (!nfs4_server_supports_acls(server))
3394 return -EOPNOTSUPP;
642ac549 3395 nfs_inode_return_delegation(inode);
4b580ee3 3396 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3397 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3398 nfs_access_zap_cache(inode);
3399 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3400 return ret;
3401}
3402
16b4289c
TM		 3403static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3404{
3405 struct nfs4_exception exception = { };
3406 int err;
3407 do {
3408 err = nfs4_handle_exception(NFS_SERVER(inode),
3409 __nfs4_proc_set_acl(inode, buf, buflen),
3410 &exception);
3411 } while (exception.retry);
3412 return err;
3413}
3414
1da177e4 3415static int
8328d59f 3416_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3417{
1da177e4
LT		 3418 if (!clp || task->tk_status >= 0)
3419 return 0;
3420 switch(task->tk_status) {
9e33bed5
TM		 3421 case -NFS4ERR_ADMIN_REVOKED:
3422 case -NFS4ERR_BAD_STATEID:
3423 case -NFS4ERR_OPENMODE:
3424 if (state == NULL)
3425 break;
3426 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3427 case -NFS4ERR_STALE_CLIENTID:
3428 case -NFS4ERR_STALE_STATEID:
3429 case -NFS4ERR_EXPIRED:
5d00837b 3430 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3431 nfs4_schedule_state_recovery(clp);
e005e804 3432 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3433 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3434 task->tk_status = 0;
3435 return -EAGAIN;
4745e315
AA		 3436#if defined(CONFIG_NFS_V4_1)
3437 case -NFS4ERR_BADSESSION:
3438 case -NFS4ERR_BADSLOT:
3439 case -NFS4ERR_BAD_HIGH_SLOT:
3440 case -NFS4ERR_DEADSESSION:
3441 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3442 case -NFS4ERR_SEQ_FALSE_RETRY:
3443 case -NFS4ERR_SEQ_MISORDERED:
3444 dprintk("%s ERROR %d, Reset session\n", __func__,
3445 task->tk_status);
0b9e2d41 3446 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3447 task->tk_status = 0;
3448 return -EAGAIN;
3449#endif /* CONFIG_NFS_V4_1 */
1da177e4 3450 case -NFS4ERR_DELAY:
8328d59f
AA		 3451 if (server)
3452 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3453 case -NFS4ERR_GRACE:
1da177e4
LT		 3454 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3455 task->tk_status = 0;
3456 return -EAGAIN;
3457 case -NFS4ERR_OLD_STATEID:
3458 task->tk_status = 0;
3459 return -EAGAIN;
3460 }
3461 task->tk_status = nfs4_map_errors(task->tk_status);
3462 return 0;
3463}
3464
8328d59f
AA		 3465static int
3466nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3467{
3468 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3469}
3470
adfa6f98 3471int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3472{
3473 nfs4_verifier sc_verifier;
3474 struct nfs4_setclientid setclientid = {
3475 .sc_verifier = &sc_verifier,
3476 .sc_prog = program,
3477 };
3478 struct rpc_message msg = {
3479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3480 .rpc_argp = &setclientid,
3481 .rpc_resp = clp,
286d7d6a 3482 .rpc_cred = cred,
1da177e4 3483 };
bc4785cd 3484 __be32 *p;
1da177e4
LT		 3485 int loop = 0;
3486 int status;
3487
bc4785cd 3488 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3489 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3490 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3491
3492 for(;;) {
3493 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3494 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3495 clp->cl_ipaddr,
3496 rpc_peeraddr2str(clp->cl_rpcclient,
3497 RPC_DISPLAY_ADDR),
69dd716c
TM		 3498 rpc_peeraddr2str(clp->cl_rpcclient,
3499 RPC_DISPLAY_PROTO),
78ea323b 3500 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3501 clp->cl_id_uniquifier);
3502 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3503 sizeof(setclientid.sc_netid),
3504 rpc_peeraddr2str(clp->cl_rpcclient,
3505 RPC_DISPLAY_NETID));
1da177e4 3506 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3507 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3508 clp->cl_ipaddr, port >> 8, port & 255);
3509
3510 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3511 if (status != -NFS4ERR_CLID_INUSE)
3512 break;
3513 if (signalled())
3514 break;
3515 if (loop++ & 1)
3516 ssleep(clp->cl_lease_time + 1);
3517 else
3518 if (++clp->cl_id_uniquifier == 0)
3519 break;
3520 }
3521 return status;
3522}
3523
adfa6f98 3524static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3525{
3526 struct nfs_fsinfo fsinfo;
3527 struct rpc_message msg = {
3528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3529 .rpc_argp = clp,
3530 .rpc_resp = &fsinfo,
286d7d6a 3531 .rpc_cred = cred,
1da177e4
LT		 3532 };
3533 unsigned long now;
3534 int status;
3535
3536 now = jiffies;
3537 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3538 if (status == 0) {
3539 spin_lock(&clp->cl_lock);
3540 clp->cl_lease_time = fsinfo.lease_time * HZ;
3541 clp->cl_last_renewal = now;
3542 spin_unlock(&clp->cl_lock);
3543 }
3544 return status;
3545}
3546
adfa6f98 3547int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3548{
77e03677 3549 long timeout = 0;
51581f3b
TM		 3550 int err;
3551 do {
3552 err = _nfs4_proc_setclientid_confirm(clp, cred);
3553 switch (err) {
3554 case 0:
3555 return err;
3556 case -NFS4ERR_RESOURCE:
3557 /* The IBM lawyers misread another document! */
3558 case -NFS4ERR_DELAY:
3559 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3560 }
3561 } while (err == 0);
3562 return err;
3563}
3564
fe650407
TM		 3565struct nfs4_delegreturndata {
3566 struct nfs4_delegreturnargs args;
fa178f29 3567 struct nfs4_delegreturnres res;
fe650407
TM		 3568 struct nfs_fh fh;
3569 nfs4_stateid stateid;
26e976a8 3570 unsigned long timestamp;
fa178f29 3571 struct nfs_fattr fattr;
fe650407
TM		 3572 int rpc_status;
3573};
3574
fe650407
TM		 3575static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3576{
3577 struct nfs4_delegreturndata *data = calldata;
938e1010 3578
d61e612a
TM		 3579 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3580 task->tk_status);
938e1010 3581
79708861
RL		 3582 switch (task->tk_status) {
3583 case -NFS4ERR_STALE_STATEID:
3584 case -NFS4ERR_EXPIRED:
3585 case 0:
fa178f29 3586 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3587 break;
3588 default:
3589 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3590 -EAGAIN) {
3591 nfs_restart_rpc(task, data->res.server->nfs_client);
3592 return;
3593 }
3594 }
3595 data->rpc_status = task->tk_status;
fe650407
TM		 3596}
3597
3598static void nfs4_delegreturn_release(void *calldata)
3599{
fe650407
TM		 3600 kfree(calldata);
3601}
3602
938e1010
AA		 3603#if defined(CONFIG_NFS_V4_1)
3604static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3605{
3606 struct nfs4_delegreturndata *d_data;
3607
3608 d_data = (struct nfs4_delegreturndata *)data;
3609
3610 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3611 &d_data->args.seq_args,
3612 &d_data->res.seq_res, 1, task))
3613 return;
3614 rpc_call_start(task);
3615}
3616#endif /* CONFIG_NFS_V4_1 */
3617
c8d149f3 3618static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3619#if defined(CONFIG_NFS_V4_1)
3620 .rpc_call_prepare = nfs4_delegreturn_prepare,
3621#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3622 .rpc_call_done = nfs4_delegreturn_done,
3623 .rpc_release = nfs4_delegreturn_release,
3624};
3625
e6f81075 3626static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3627{
3628 struct nfs4_delegreturndata *data;
fa178f29 3629 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3630 struct rpc_task *task;
5138fde0
TM		 3631 struct rpc_message msg = {
3632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3633 .rpc_cred = cred,
3634 };
c970aa85
TM		 3635 struct rpc_task_setup task_setup_data = {
3636 .rpc_client = server->client,
5138fde0 3637 .rpc_message = &msg,
c970aa85
TM		 3638 .callback_ops = &nfs4_delegreturn_ops,
3639 .flags = RPC_TASK_ASYNC,
3640 };
e6f81075 3641 int status = 0;
fe650407 3642
938e1010 3643 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3644 if (data == NULL)
3645 return -ENOMEM;
3646 data->args.fhandle = &data->fh;
3647 data->args.stateid = &data->stateid;
fa178f29 3648 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3649 nfs_copy_fh(&data->fh, NFS_FH(inode));
3650 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3651 data->res.fattr = &data->fattr;
3652 data->res.server = server;
5f7dbd5c 3653 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3654 nfs_fattr_init(data->res.fattr);
26e976a8 3655 data->timestamp = jiffies;
fe650407
TM		 3656 data->rpc_status = 0;
3657
c970aa85 3658 task_setup_data.callback_data = data;
5138fde0
TM		 3659 msg.rpc_argp = &data->args,
3660 msg.rpc_resp = &data->res,
c970aa85 3661 task = rpc_run_task(&task_setup_data);
7a1218a2 3662 if (IS_ERR(task))
fe650407 3663 return PTR_ERR(task);
e6f81075
TM		 3664 if (!issync)
3665 goto out;
fe650407 3666 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3667 if (status != 0)
3668 goto out;
3669 status = data->rpc_status;
3670 if (status != 0)
3671 goto out;
3672 nfs_refresh_inode(inode, &data->fattr);
3673out:
e6b3c4db 3674 rpc_put_task(task);
fe650407 3675 return status;
1da177e4
LT		 3676}
3677
e6f81075 3678int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3679{
3680 struct nfs_server *server = NFS_SERVER(inode);
3681 struct nfs4_exception exception = { };
3682 int err;
3683 do {
e6f81075 3684 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3685 switch (err) {
3686 case -NFS4ERR_STALE_STATEID:
3687 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3688 case 0:
3689 return 0;
3690 }
3691 err = nfs4_handle_exception(server, err, &exception);
3692 } while (exception.retry);
3693 return err;
3694}
3695
3696#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3697#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3698
3699/*
3700 * sleep, with exponential backoff, and retry the LOCK operation.
3701 */
3702static unsigned long
3703nfs4_set_lock_task_retry(unsigned long timeout)
3704{
150030b7 3705 schedule_timeout_killable(timeout);
1da177e4
LT		 3706 timeout <<= 1;
3707 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3708 return NFS4_LOCK_MAXTIMEOUT;
3709 return timeout;
3710}
3711
1da177e4
LT		 3712static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3713{
3714 struct inode *inode = state->inode;
3715 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3716 struct nfs_client *clp = server->nfs_client;
911d1aaf 3717 struct nfs_lockt_args arg = {
1da177e4 3718 .fh = NFS_FH(inode),
911d1aaf 3719 .fl = request,
1da177e4 3720 };
911d1aaf
TM		 3721 struct nfs_lockt_res res = {
3722 .denied = request,
1da177e4
LT		 3723 };
3724 struct rpc_message msg = {
3725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3726 .rpc_argp = &arg,
3727 .rpc_resp = &res,
3728 .rpc_cred = state->owner->so_cred,
3729 };
1da177e4
LT		 3730 struct nfs4_lock_state *lsp;
3731 int status;
3732
911d1aaf 3733 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3734 status = nfs4_set_lock_state(state, request);
3735 if (status != 0)
3736 goto out;
3737 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3738 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3739 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3740 switch (status) {
3741 case 0:
3742 request->fl_type = F_UNLCK;
3743 break;
3744 case -NFS4ERR_DENIED:
3745 status = 0;
1da177e4 3746 }
70cc6487 3747 request->fl_ops->fl_release_private(request);
8d0a8a9d 3748out:
1da177e4
LT		 3749 return status;
3750}
3751
3752static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3753{
3754 struct nfs4_exception exception = { };
3755 int err;
3756
3757 do {
3758 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3759 _nfs4_proc_getlk(state, cmd, request),
3760 &exception);
3761 } while (exception.retry);
3762 return err;
3763}
3764
3765static int do_vfs_lock(struct file *file, struct file_lock *fl)
3766{
3767 int res = 0;
3768 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3769 case FL_POSIX:
3770 res = posix_lock_file_wait(file, fl);
3771 break;
3772 case FL_FLOCK:
3773 res = flock_lock_file_wait(file, fl);
3774 break;
3775 default:
3776 BUG();
3777 }
1da177e4
LT		 3778 return res;
3779}
3780
faf5f49c 3781struct nfs4_unlockdata {
911d1aaf
TM		 3782 struct nfs_locku_args arg;
3783 struct nfs_locku_res res;
faf5f49c
TM		 3784 struct nfs4_lock_state *lsp;
3785 struct nfs_open_context *ctx;
911d1aaf
TM		 3786 struct file_lock fl;
3787 const struct nfs_server *server;
26e976a8 3788 unsigned long timestamp;
faf5f49c
TM		 3789};
3790
911d1aaf
TM		 3791static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3792 struct nfs_open_context *ctx,
3793 struct nfs4_lock_state *lsp,
3794 struct nfs_seqid *seqid)
3795{
3796 struct nfs4_unlockdata *p;
3797 struct inode *inode = lsp->ls_state->inode;
3798
a893693c 3799 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3800 if (p == NULL)
3801 return NULL;
3802 p->arg.fh = NFS_FH(inode);
3803 p->arg.fl = &p->fl;
3804 p->arg.seqid = seqid;
c1d51931 3805 p->res.seqid = seqid;
5f7dbd5c 3806 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3807 p->arg.stateid = &lsp->ls_stateid;
3808 p->lsp = lsp;
3809 atomic_inc(&lsp->ls_count);
3810 /* Ensure we don't close file until we're done freeing locks! */
3811 p->ctx = get_nfs_open_context(ctx);
3812 memcpy(&p->fl, fl, sizeof(p->fl));
3813 p->server = NFS_SERVER(inode);
3814 return p;
3815}
3816
06f814a3 3817static void nfs4_locku_release_calldata(void *data)
faf5f49c 3818{
963d8fe5 3819 struct nfs4_unlockdata *calldata = data;
911d1aaf 3820 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3821 nfs4_put_lock_state(calldata->lsp);
3822 put_nfs_open_context(calldata->ctx);
3823 kfree(calldata);
faf5f49c
TM		 3824}
3825
963d8fe5 3826static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3827{
963d8fe5 3828 struct nfs4_unlockdata *calldata = data;
faf5f49c 3829
a893693c
AA		 3830 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3831 task->tk_status);
06f814a3
TM		 3832 if (RPC_ASSASSINATED(task))
3833 return;
faf5f49c
TM		 3834 switch (task->tk_status) {
3835 case 0:
3836 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3837 calldata->res.stateid.data,
faf5f49c 3838 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3839 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3840 break;
9e33bed5
TM		 3841 case -NFS4ERR_BAD_STATEID:
3842 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3843 case -NFS4ERR_STALE_STATEID:
3844 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3845 break;
3846 default:
9e33bed5 3847 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3848 nfs_restart_rpc(task,
d61e612a 3849 calldata->server->nfs_client);
faf5f49c 3850 }
faf5f49c
TM		 3851}
3852
4ce70ada 3853static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3854{
4ce70ada 3855 struct nfs4_unlockdata *calldata = data;
faf5f49c 3856
911d1aaf 3857 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3858 return;
3859 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3860 /* Note: exit _without_ running nfs4_locku_done */
3861 task->tk_action = NULL;
faf5f49c
TM		 3862 return;
3863 }
26e976a8 3864 calldata->timestamp = jiffies;
a893693c
AA		 3865 if (nfs4_setup_sequence(calldata->server->nfs_client,
3866 &calldata->arg.seq_args,
3867 &calldata->res.seq_res, 1, task))
3868 return;
5138fde0 3869 rpc_call_start(task);
faf5f49c
TM		 3870}
3871
963d8fe5 3872static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3873 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3874 .rpc_call_done = nfs4_locku_done,
06f814a3 3875 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3876};
3877
a5d16a4d
TM		 3878static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3879 struct nfs_open_context *ctx,
3880 struct nfs4_lock_state *lsp,
3881 struct nfs_seqid *seqid)
3882{
3883 struct nfs4_unlockdata *data;
5138fde0
TM		 3884 struct rpc_message msg = {
3885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3886 .rpc_cred = ctx->cred,
3887 };
c970aa85
TM		 3888 struct rpc_task_setup task_setup_data = {
3889 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3890 .rpc_message = &msg,
c970aa85 3891 .callback_ops = &nfs4_locku_ops,
101070ca 3892 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3893 .flags = RPC_TASK_ASYNC,
3894 };
a5d16a4d 3895
137d6aca
FF		 3896 /* Ensure this is an unlock - when canceling a lock, the
3897 * canceled lock is passed in, and it won't be an unlock.
3898 */
3899 fl->fl_type = F_UNLCK;
3900
a5d16a4d
TM		 3901 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3902 if (data == NULL) {
3903 nfs_free_seqid(seqid);
3904 return ERR_PTR(-ENOMEM);
3905 }
3906
5138fde0
TM		 3907 msg.rpc_argp = &data->arg,
3908 msg.rpc_resp = &data->res,
c970aa85
TM		 3909 task_setup_data.callback_data = data;
3910 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3911}
3912
faf5f49c
TM		 3913static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3914{
19e03c57 3915 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3916 struct nfs_seqid *seqid;
1da177e4 3917 struct nfs4_lock_state *lsp;
06f814a3
TM		 3918 struct rpc_task *task;
3919 int status = 0;
536ff0f8 3920 unsigned char fl_flags = request->fl_flags;
faf5f49c 3921
8d0a8a9d 3922 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3923 /* Unlock _before_ we do the RPC call */
3924 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3925 down_read(&nfsi->rwsem);
3926 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3927 up_read(&nfsi->rwsem);
9b073574 3928 goto out;
19e03c57
TM		 3929 }
3930 up_read(&nfsi->rwsem);
8d0a8a9d 3931 if (status != 0)
9b073574
TM		 3932 goto out;
3933 /* Is this a delegated lock? */
3934 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3935 goto out;
8d0a8a9d 3936 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3937 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3938 status = -ENOMEM;
911d1aaf 3939 if (seqid == NULL)
9b073574 3940 goto out;
cd3758e3 3941 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3942 status = PTR_ERR(task);
3943 if (IS_ERR(task))
9b073574 3944 goto out;
a5d16a4d 3945 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3946 rpc_put_task(task);
9b073574 3947out:
536ff0f8 3948 request->fl_flags = fl_flags;
1da177e4
LT		 3949 return status;
3950}
3951
a5d16a4d
TM		 3952struct nfs4_lockdata {
3953 struct nfs_lock_args arg;
3954 struct nfs_lock_res res;
3955 struct nfs4_lock_state *lsp;
3956 struct nfs_open_context *ctx;
3957 struct file_lock fl;
26e976a8 3958 unsigned long timestamp;
a5d16a4d
TM		 3959 int rpc_status;
3960 int cancelled;
66179efe 3961 struct nfs_server *server;
a5d16a4d
TM		 3962};
3963
3964static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3965 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3966{
a5d16a4d
TM		 3967 struct nfs4_lockdata *p;
3968 struct inode *inode = lsp->ls_state->inode;
1da177e4 3969 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3970
3971 p = kzalloc(sizeof(*p), GFP_KERNEL);
3972 if (p == NULL)
3973 return NULL;
3974
3975 p->arg.fh = NFS_FH(inode);
3976 p->arg.fl = &p->fl;
2f74c0a0
TM		 3977 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3978 if (p->arg.open_seqid == NULL)
3979 goto out_free;
a5d16a4d
TM		 3980 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3981 if (p->arg.lock_seqid == NULL)
2f74c0a0 3982 goto out_free_seqid;
a5d16a4d 3983 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3984 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3985 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3986 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3987 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3988 p->lsp = lsp;
66179efe 3989 p->server = server;
a5d16a4d
TM		 3990 atomic_inc(&lsp->ls_count);
3991 p->ctx = get_nfs_open_context(ctx);
3992 memcpy(&p->fl, fl, sizeof(p->fl));
3993 return p;
2f74c0a0
TM		 3994out_free_seqid:
3995 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3996out_free:
3997 kfree(p);
3998 return NULL;
3999}
4000
4001static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4002{
4003 struct nfs4_lockdata *data = calldata;
4004 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4005
3110ff80 4006 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4007 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4008 return;
a5d16a4d
TM		 4009 /* Do we need to do an open_to_lock_owner? */
4010 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4011 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4012 return;
a5d16a4d
TM		 4013 data->arg.open_stateid = &state->stateid;
4014 data->arg.new_lock_owner = 1;
c1d51931 4015 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4016 } else
4017 data->arg.new_lock_owner = 0;
26e976a8 4018 data->timestamp = jiffies;
66179efe
AA		 4019 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
4020 &data->res.seq_res, 1, task))
4021 return;
5138fde0 4022 rpc_call_start(task);
3110ff80 4023 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4024}
4025
b257957e
AB		 4026static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4027{
4028 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4029 nfs4_lock_prepare(task, calldata);
4030}
4031
a5d16a4d
TM		 4032static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4033{
4034 struct nfs4_lockdata *data = calldata;
4035
3110ff80 4036 dprintk("%s: begin!\n", __func__);
a5d16a4d 4037
d61e612a
TM		 4038 nfs4_sequence_done(data->server, &data->res.seq_res,
4039 task->tk_status);
66179efe 4040
a5d16a4d
TM		 4041 data->rpc_status = task->tk_status;
4042 if (RPC_ASSASSINATED(task))
4043 goto out;
4044 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4045 if (data->rpc_status == 0)
4046 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4047 else
4048 goto out;
4049 }
4050 if (data->rpc_status == 0) {
4051 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4052 sizeof(data->lsp->ls_stateid.data));
4053 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4054 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4055 }
a5d16a4d 4056out:
3110ff80 4057 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4058}
4059
4060static void nfs4_lock_release(void *calldata)
4061{
4062 struct nfs4_lockdata *data = calldata;
4063
3110ff80 4064 dprintk("%s: begin!\n", __func__);
2f74c0a0 4065 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4066 if (data->cancelled != 0) {
4067 struct rpc_task *task;
4068 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4069 data->arg.lock_seqid);
4070 if (!IS_ERR(task))
e6b3c4db 4071 rpc_put_task(task);
3110ff80 4072 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4073 } else
4074 nfs_free_seqid(data->arg.lock_seqid);
4075 nfs4_put_lock_state(data->lsp);
4076 put_nfs_open_context(data->ctx);
4077 kfree(data);
3110ff80 4078 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4079}
4080
4081static const struct rpc_call_ops nfs4_lock_ops = {
4082 .rpc_call_prepare = nfs4_lock_prepare,
4083 .rpc_call_done = nfs4_lock_done,
4084 .rpc_release = nfs4_lock_release,
4085};
4086
b257957e
AB		 4087static const struct rpc_call_ops nfs4_recover_lock_ops = {
4088 .rpc_call_prepare = nfs4_recover_lock_prepare,
4089 .rpc_call_done = nfs4_lock_done,
4090 .rpc_release = nfs4_lock_release,
4091};
4092
afe6c27c 4093static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4094{
4095 struct nfs4_lockdata *data;
4096 struct rpc_task *task;
5138fde0
TM		 4097 struct rpc_message msg = {
4098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4099 .rpc_cred = state->owner->so_cred,
4100 };
c970aa85
TM		 4101 struct rpc_task_setup task_setup_data = {
4102 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4103 .rpc_message = &msg,
c970aa85 4104 .callback_ops = &nfs4_lock_ops,
101070ca 4105 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4106 .flags = RPC_TASK_ASYNC,
4107 };
a5d16a4d
TM		 4108 int ret;
4109
3110ff80 4110 dprintk("%s: begin!\n", __func__);
cd3758e3 4111 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4112 fl->fl_u.nfs4_fl.owner);
4113 if (data == NULL)
4114 return -ENOMEM;
4115 if (IS_SETLKW(cmd))
4116 data->arg.block = 1;
b257957e
AB		 4117 if (recovery_type > NFS_LOCK_NEW) {
4118 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4119 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4120 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4121 }
5138fde0
TM		 4122 msg.rpc_argp = &data->arg,
4123 msg.rpc_resp = &data->res,
c970aa85
TM		 4124 task_setup_data.callback_data = data;
4125 task = rpc_run_task(&task_setup_data);
7a1218a2 4126 if (IS_ERR(task))
a5d16a4d 4127 return PTR_ERR(task);
a5d16a4d
TM		 4128 ret = nfs4_wait_for_completion_rpc_task(task);
4129 if (ret == 0) {
4130 ret = data->rpc_status;
a5d16a4d
TM		 4131 } else
4132 data->cancelled = 1;
e6b3c4db 4133 rpc_put_task(task);
3110ff80 4134 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4135 return ret;
1da177e4
LT		 4136}
4137
4138static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4139{
202b50dc
TM		 4140 struct nfs_server *server = NFS_SERVER(state->inode);
4141 struct nfs4_exception exception = { };
4142 int err;
4143
4144 do {
42a2d13e
TM		 4145 /* Cache the lock if possible... */
4146 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4147 return 0;
afe6c27c 4148 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
202b50dc
TM		 4149 if (err != -NFS4ERR_DELAY)
4150 break;
4151 nfs4_handle_exception(server, err, &exception);
4152 } while (exception.retry);
4153 return err;
1da177e4
LT		 4154}
4155
4156static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4157{
202b50dc
TM		 4158 struct nfs_server *server = NFS_SERVER(state->inode);
4159 struct nfs4_exception exception = { };
4160 int err;
4161
6bfc93ef
TM		 4162 err = nfs4_set_lock_state(state, request);
4163 if (err != 0)
4164 return err;
202b50dc 4165 do {
42a2d13e
TM		 4166 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4167 return 0;
afe6c27c 4168 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4169 switch (err) {
4170 default:
4171 goto out;
4172 case -NFS4ERR_GRACE:
4173 case -NFS4ERR_DELAY:
4174 nfs4_handle_exception(server, err, &exception);
4175 err = 0;
4176 }
202b50dc 4177 } while (exception.retry);
a9ed2e25 4178out:
202b50dc 4179 return err;
1da177e4
LT		 4180}
4181
4182static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4183{
19e03c57 4184 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4185 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4186 int status;
4187
6bfc93ef 4188 /* Is this a delegated open? */
6bfc93ef
TM		 4189 status = nfs4_set_lock_state(state, request);
4190 if (status != 0)
4191 goto out;
01c3b861
TM		 4192 request->fl_flags |= FL_ACCESS;
4193 status = do_vfs_lock(request->fl_file, request);
4194 if (status < 0)
4195 goto out;
19e03c57 4196 down_read(&nfsi->rwsem);
01c3b861 4197 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4198 /* Yes: cache locks! */
01c3b861 4199 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4200 request->fl_flags = fl_flags & ~FL_SLEEP;
4201 status = do_vfs_lock(request->fl_file, request);
4202 goto out_unlock;
01c3b861 4203 }
afe6c27c 4204 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4205 if (status != 0)
01c3b861 4206 goto out_unlock;
6bfc93ef 4207 /* Note: we always want to sleep here! */
01c3b861 4208 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4209 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4210 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4211out_unlock:
19e03c57 4212 up_read(&nfsi->rwsem);
01c3b861
TM		 4213out:
4214 request->fl_flags = fl_flags;
1da177e4
LT		 4215 return status;
4216}
4217
4218static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4219{
4220 struct nfs4_exception exception = { };
4221 int err;
4222
4223 do {
965b5d67
TM		 4224 err = _nfs4_proc_setlk(state, cmd, request);
4225 if (err == -NFS4ERR_DENIED)
4226 err = -EAGAIN;
1da177e4 4227 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4228 err, &exception);
1da177e4
LT		 4229 } while (exception.retry);
4230 return err;
4231}
4232
4233static int
4234nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4235{
4236 struct nfs_open_context *ctx;
4237 struct nfs4_state *state;
4238 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4239 int status;
4240
4241 /* verify open state */
cd3758e3 4242 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4243 state = ctx->state;
4244
4245 if (request->fl_start < 0 || request->fl_end < 0)
4246 return -EINVAL;
4247
d953126a
TM		 4248 if (IS_GETLK(cmd)) {
4249 if (state != NULL)
4250 return nfs4_proc_getlk(state, F_GETLK, request);
4251 return 0;
4252 }
1da177e4
LT		 4253
4254 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4255 return -EINVAL;
4256
d953126a
TM		 4257 if (request->fl_type == F_UNLCK) {
4258 if (state != NULL)
4259 return nfs4_proc_unlck(state, cmd, request);
4260 return 0;
4261 }
1da177e4 4262
d953126a
TM		 4263 if (state == NULL)
4264 return -ENOLCK;
1da177e4
LT		 4265 do {
4266 status = nfs4_proc_setlk(state, cmd, request);
4267 if ((status != -EAGAIN) || IS_SETLK(cmd))
4268 break;
4269 timeout = nfs4_set_lock_task_retry(timeout);
4270 status = -ERESTARTSYS;
4271 if (signalled())
4272 break;
4273 } while(status < 0);
1da177e4
LT		 4274 return status;
4275}
4276
888e694c
TM		 4277int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4278{
4279 struct nfs_server *server = NFS_SERVER(state->inode);
4280 struct nfs4_exception exception = { };
4281 int err;
4282
4283 err = nfs4_set_lock_state(state, fl);
4284 if (err != 0)
4285 goto out;
4286 do {
afe6c27c 4287 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4288 switch (err) {
4289 default:
4290 printk(KERN_ERR "%s: unhandled error %d.\n",
4291 __func__, err);
4292 case 0:
965b5d67 4293 case -ESTALE:
d5122201
TM		 4294 goto out;
4295 case -NFS4ERR_EXPIRED:
4296 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4297 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4298 case -NFS4ERR_BADSESSION:
4299 case -NFS4ERR_BADSLOT:
4300 case -NFS4ERR_BAD_HIGH_SLOT:
4301 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4302 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4303 nfs4_schedule_state_recovery(server->nfs_client);
4304 goto out;
965b5d67
TM		 4305 case -ERESTARTSYS:
4306 /*
4307 * The show must go on: exit, but mark the
4308 * stateid as needing recovery.
4309 */
4310 case -NFS4ERR_ADMIN_REVOKED:
4311 case -NFS4ERR_BAD_STATEID:
4312 case -NFS4ERR_OPENMODE:
4313 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4314 err = 0;
4315 goto out;
4316 case -ENOMEM:
4317 case -NFS4ERR_DENIED:
4318 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4319 err = 0;
4320 goto out;
d5122201
TM		 4321 case -NFS4ERR_DELAY:
4322 break;
4323 }
888e694c
TM		 4324 err = nfs4_handle_exception(server, err, &exception);
4325 } while (exception.retry);
4326out:
4327 return err;
4328}
6b3b5496 4329
aa1870af
BF		 4330#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4331
6b3b5496
BF		 4332int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4333 size_t buflen, int flags)
4334{
4b580ee3
BF		 4335 struct inode *inode = dentry->d_inode;
4336
4337 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4338 return -EOPNOTSUPP;
4339
4b580ee3 4340 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4341}
4342
4343/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4344 * and that's what we'll do for e.g. user attributes that haven't been set.
4345 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4346 * attributes in kernel-managed attribute namespaces. */
4347ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4348 size_t buflen)
4349{
aa1870af
BF		 4350 struct inode *inode = dentry->d_inode;
4351
4352 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4353 return -EOPNOTSUPP;
4354
4355 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4356}
4357
4358ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4359{
aa1870af 4360 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4361
096455a2
BF		 4362 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4363 return 0;
6b3b5496
BF		 4364 if (buf && buflen < len)
4365 return -ERANGE;
4366 if (buf)
aa1870af
BF		 4367 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4368 return len;
6b3b5496
BF		 4369}
4370
69aaaae1
TM		 4371static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4372{
4373 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4374 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4375 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4376 return;
4377
4378 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4379 NFS_ATTR_FATTR_NLINK;
4380 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4381 fattr->nlink = 2;
4382}
4383
56659e99 4384int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4385 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4386{
4387 struct nfs_server *server = NFS_SERVER(dir);
4388 u32 bitmask[2] = {
361e624f
MN		 4389 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4390 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4391 };
4392 struct nfs4_fs_locations_arg args = {
4393 .dir_fh = NFS_FH(dir),
c228fd3a 4394 .name = name,
683b57b4
TM		 4395 .page = page,
4396 .bitmask = bitmask,
4397 };
22958463
BH		 4398 struct nfs4_fs_locations_res res = {
4399 .fs_locations = fs_locations,
4400 };
683b57b4
TM		 4401 struct rpc_message msg = {
4402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4403 .rpc_argp = &args,
22958463 4404 .rpc_resp = &res,
683b57b4
TM		 4405 };
4406 int status;
4407
3110ff80 4408 dprintk("%s: start\n", __func__);
c228fd3a 4409 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4410 fs_locations->server = server;
830b8e33 4411 fs_locations->nlocations = 0;
cccef3b9 4412 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4413 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4414 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4415 return status;
4416}
4417
557134a3 4418#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4419/*
4420 * nfs4_proc_exchange_id()
4421 *
4422 * Since the clientid has expired, all compounds using sessions
4423 * associated with the stale clientid will be returning
4424 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4425 * be in some phase of session reset.
4426 */
4d643d1d 4427int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4428{
4429 nfs4_verifier verifier;
4430 struct nfs41_exchange_id_args args = {
4431 .client = clp,
4432 .flags = clp->cl_exchange_flags,
4433 };
4434 struct nfs41_exchange_id_res res = {
4435 .client = clp,
4436 };
4437 int status;
4438 struct rpc_message msg = {
4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4440 .rpc_argp = &args,
4441 .rpc_resp = &res,
4442 .rpc_cred = cred,
4443 };
4444 __be32 *p;
4445
4446 dprintk("--> %s\n", __func__);
4447 BUG_ON(clp == NULL);
a7b72103 4448
7b183d0d
AB		 4449 /* Remove server-only flags */
4450 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4451
99fe60d0
BH		 4452 p = (u32 *)verifier.data;
4453 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4454 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4455 args.verifier = &verifier;
4456
4457 while (1) {
4458 args.id_len = scnprintf(args.id, sizeof(args.id),
4459 "%s/%s %u",
4460 clp->cl_ipaddr,
4461 rpc_peeraddr2str(clp->cl_rpcclient,
4462 RPC_DISPLAY_ADDR),
4463 clp->cl_id_uniquifier);
4464
4465 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4466
4467 if (status != NFS4ERR_CLID_INUSE)
4468 break;
4469
4470 if (signalled())
4471 break;
4472
4473 if (++clp->cl_id_uniquifier == 0)
4474 break;
4475 }
4476
4477 dprintk("<-- %s status= %d\n", __func__, status);
4478 return status;
4479}
4480
2050f0cc
AA		 4481struct nfs4_get_lease_time_data {
4482 struct nfs4_get_lease_time_args *args;
4483 struct nfs4_get_lease_time_res *res;
4484 struct nfs_client *clp;
4485};
4486
4487static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4488 void *calldata)
4489{
4490 int ret;
4491 struct nfs4_get_lease_time_data *data =
4492 (struct nfs4_get_lease_time_data *)calldata;
4493
4494 dprintk("--> %s\n", __func__);
689cf5c1 4495 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4496 /* just setup sequence, do not trigger session recovery
4497 since we're invoked within one */
4498 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4499 &data->args->la_seq_args,
4500 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4501
4502 BUG_ON(ret == -EAGAIN);
4503 rpc_call_start(task);
4504 dprintk("<-- %s\n", __func__);
4505}
4506
4507/*
4508 * Called from nfs4_state_manager thread for session setup, so don't recover
4509 * from sequence operation or clientid errors.
4510 */
4511static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4512{
4513 struct nfs4_get_lease_time_data *data =
4514 (struct nfs4_get_lease_time_data *)calldata;
4515
4516 dprintk("--> %s\n", __func__);
4517 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4518 switch (task->tk_status) {
4519 case -NFS4ERR_DELAY:
4520 case -NFS4ERR_GRACE:
4521 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4522 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4523 task->tk_status = 0;
0110ee15 4524 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4525 return;
4526 }
2050f0cc
AA		 4527 dprintk("<-- %s\n", __func__);
4528}
4529
4530struct rpc_call_ops nfs4_get_lease_time_ops = {
4531 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4532 .rpc_call_done = nfs4_get_lease_time_done,
4533};
4534
4535int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4536{
4537 struct rpc_task *task;
4538 struct nfs4_get_lease_time_args args;
4539 struct nfs4_get_lease_time_res res = {
4540 .lr_fsinfo = fsinfo,
4541 };
4542 struct nfs4_get_lease_time_data data = {
4543 .args = &args,
4544 .res = &res,
4545 .clp = clp,
4546 };
4547 struct rpc_message msg = {
4548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4549 .rpc_argp = &args,
4550 .rpc_resp = &res,
4551 };
4552 struct rpc_task_setup task_setup = {
4553 .rpc_client = clp->cl_rpcclient,
4554 .rpc_message = &msg,
4555 .callback_ops = &nfs4_get_lease_time_ops,
4556 .callback_data = &data
4557 };
4558 int status;
4559
4560 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4561 dprintk("--> %s\n", __func__);
4562 task = rpc_run_task(&task_setup);
4563
4564 if (IS_ERR(task))
4565 status = PTR_ERR(task);
4566 else {
4567 status = task->tk_status;
4568 rpc_put_task(task);
4569 }
4570 dprintk("<-- %s return %d\n", __func__, status);
4571
4572 return status;
4573}
4574
b73dafa7
RL		 4575/*
4576 * Reset a slot table
4577 */
4578static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4579 int old_max_slots, int ivalue)
ac72b7b3 4580{
b73dafa7 4581 int i;
ac72b7b3
AA		 4582 int ret = 0;
4583
b73dafa7 4584 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4585
b73dafa7
RL		 4586 /*
4587 * Until we have dynamic slot table adjustment, insist
4588 * upon the same slot table size
4589 */
ac72b7b3
AA		 4590 if (max_slots != old_max_slots) {
4591 dprintk("%s reset slot table does't match old\n",
4592 __func__);
4593 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4594 goto out;
4595 }
4596 spin_lock(&tbl->slot_tbl_lock);
4597 for (i = 0; i < max_slots; ++i)
b73dafa7 4598 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4599 spin_unlock(&tbl->slot_tbl_lock);
4600 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4601 tbl, tbl->slots, tbl->max_slots);
4602out:
4603 dprintk("<-- %s: return %d\n", __func__, ret);
4604 return ret;
4605}
4606
b73dafa7
RL		 4607/*
4608 * Reset the forechannel and backchannel slot tables
4609 */
4610static int nfs4_reset_slot_tables(struct nfs4_session *session)
4611{
4612 int status;
4613
4614 status = nfs4_reset_slot_table(&session->fc_slot_table,
4615 session->fc_attrs.max_reqs,
4616 session->fc_slot_table.max_slots,
4617 1);
f8625a6a
RL		 4618 if (status)
4619 return status;
4620
4621 status = nfs4_reset_slot_table(&session->bc_slot_table,
4622 session->bc_attrs.max_reqs,
4623 session->bc_slot_table.max_slots,
4624 0);
b73dafa7
RL		 4625 return status;
4626}
4627
f8625a6a
RL		 4628/* Destroy the slot table */
4629static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4630{
4631 if (session->fc_slot_table.slots != NULL) {
4632 kfree(session->fc_slot_table.slots);
4633 session->fc_slot_table.slots = NULL;
4634 }
4635 if (session->bc_slot_table.slots != NULL) {
4636 kfree(session->bc_slot_table.slots);
4637 session->bc_slot_table.slots = NULL;
4638 }
4639 return;
4640}
4641
fc931582
AA		 4642/*
4643 * Initialize slot table
4644 */
050047ce
RL		 4645static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4646 int max_slots, int ivalue)
fc931582 4647{
fc931582
AA		 4648 struct nfs4_slot *slot;
4649 int ret = -ENOMEM;
4650
4651 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4652
050047ce 4653 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4654
4655 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4656 if (!slot)
4657 goto out;
fc931582
AA		 4658 ret = 0;
4659
4660 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4661 tbl->max_slots = max_slots;
4662 tbl->slots = slot;
4663 tbl->highest_used_slotid = -1; /* no slot is currently used */
4664 spin_unlock(&tbl->slot_tbl_lock);
4665 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4666 tbl, tbl->slots, tbl->max_slots);
4667out:
4668 dprintk("<-- %s: return %d\n", __func__, ret);
4669 return ret;
fc931582
AA		 4670}
4671
050047ce
RL		 4672/*
4673 * Initialize the forechannel and backchannel tables
4674 */
4675static int nfs4_init_slot_tables(struct nfs4_session *session)
4676{
f26468fb
TM		 4677 struct nfs4_slot_table *tbl;
4678 int status = 0;
050047ce 4679
f26468fb
TM		 4680 tbl = &session->fc_slot_table;
4681 if (tbl->slots == NULL) {
4682 status = nfs4_init_slot_table(tbl,
4683 session->fc_attrs.max_reqs, 1);
4684 if (status)
4685 return status;
4686 }
050047ce 4687
f26468fb
TM		 4688 tbl = &session->bc_slot_table;
4689 if (tbl->slots == NULL) {
4690 status = nfs4_init_slot_table(tbl,
4691 session->bc_attrs.max_reqs, 0);
4692 if (status)
4693 nfs4_destroy_slot_tables(session);
4694 }
f8625a6a
RL		 4695
4696 return status;
557134a3
AA		 4697}
4698
4699struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4700{
4701 struct nfs4_session *session;
4702 struct nfs4_slot_table *tbl;
4703
4704 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4705 if (!session)
4706 return NULL;
76db6d95 4707
76db6d95
AA		 4708 /*
4709 * The create session reply races with the server back
4710 * channel probe. Mark the client NFS_CS_SESSION_INITING
4711 * so that the client back channel can find the
4712 * nfs_client struct
4713 */
4714 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4715 init_completion(&session->complete);
76db6d95 4716
557134a3 4717 tbl = &session->fc_slot_table;
9dfdf404 4718 tbl->highest_used_slotid = -1;
557134a3 4719 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4720 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4721
4722 tbl = &session->bc_slot_table;
9dfdf404 4723 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4724 spin_lock_init(&tbl->slot_tbl_lock);
4725 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4726
557134a3
AA		 4727 session->clp = clp;
4728 return session;
4729}
4730
4731void nfs4_destroy_session(struct nfs4_session *session)
4732{
5a0ffe54
AA		 4733 nfs4_proc_destroy_session(session);
4734 dprintk("%s Destroy backchannel for xprt %p\n",
4735 __func__, session->clp->cl_rpcclient->cl_xprt);
4736 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4737 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4738 nfs4_destroy_slot_tables(session);
557134a3
AA		 4739 kfree(session);
4740}
4741
fc931582
AA		 4742/*
4743 * Initialize the values to be used by the client in CREATE_SESSION
4744 * If nfs4_init_session set the fore channel request and response sizes,
4745 * use them.
4746 *
4747 * Set the back channel max_resp_sz_cached to zero to force the client to
4748 * always set csa_cachethis to FALSE because the current implementation
4749 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4750 */
4751static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4752{
4753 struct nfs4_session *session = args->client->cl_session;
4754 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4755 mxresp_sz = session->fc_attrs.max_resp_sz;
4756
4757 if (mxrqst_sz == 0)
4758 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4759 if (mxresp_sz == 0)
4760 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4761 /* Fore channel attributes */
4762 args->fc_attrs.headerpadsz = 0;
4763 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4764 args->fc_attrs.max_resp_sz = mxresp_sz;
4765 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4766 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4767 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4768
4769 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4770 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4771 __func__,
4772 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4773 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4774 args->fc_attrs.max_reqs);
4775
4776 /* Back channel attributes */
4777 args->bc_attrs.headerpadsz = 0;
4778 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4779 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4780 args->bc_attrs.max_resp_sz_cached = 0;
4781 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4782 args->bc_attrs.max_reqs = 1;
4783
4784 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4785 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4786 __func__,
4787 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4788 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4789 args->bc_attrs.max_reqs);
4790}
4791
8d35301d
AA		 4792static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4793{
4794 if (rcvd <= sent)
4795 return 0;
4796 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4797 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4798 return -EINVAL;
4799}
4800
4801#define _verify_fore_channel_attr(_name_) \
4802 _verify_channel_attr("fore", #_name_, \
4803 args->fc_attrs._name_, \
4804 session->fc_attrs._name_)
4805
4806#define _verify_back_channel_attr(_name_) \
4807 _verify_channel_attr("back", #_name_, \
4808 args->bc_attrs._name_, \
4809 session->bc_attrs._name_)
4810
4811/*
4812 * The server is not allowed to increase the fore channel header pad size,
4813 * maximum response size, or maximum number of operations.
4814 *
4815 * The back channel attributes are only negotiatied down: We send what the
4816 * (back channel) server insists upon.
4817 */
4818static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4819 struct nfs4_session *session)
4820{
4821 int ret = 0;
4822
4823 ret |= _verify_fore_channel_attr(headerpadsz);
4824 ret |= _verify_fore_channel_attr(max_resp_sz);
4825 ret |= _verify_fore_channel_attr(max_ops);
4826
4827 ret |= _verify_back_channel_attr(headerpadsz);
4828 ret |= _verify_back_channel_attr(max_rqst_sz);
4829 ret |= _verify_back_channel_attr(max_resp_sz);
4830 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4831 ret |= _verify_back_channel_attr(max_ops);
4832 ret |= _verify_back_channel_attr(max_reqs);
4833
4834 return ret;
4835}
4836
fc931582
AA		 4837static int _nfs4_proc_create_session(struct nfs_client *clp)
4838{
4839 struct nfs4_session *session = clp->cl_session;
4840 struct nfs41_create_session_args args = {
4841 .client = clp,
4842 .cb_program = NFS4_CALLBACK,
4843 };
4844 struct nfs41_create_session_res res = {
4845 .client = clp,
4846 };
4847 struct rpc_message msg = {
4848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4849 .rpc_argp = &args,
4850 .rpc_resp = &res,
4851 };
4852 int status;
4853
4854 nfs4_init_channel_attrs(&args);
0f91421e 4855 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4856
4857 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4858
8d35301d
AA		 4859 if (!status)
4860 /* Verify the session's negotiated channel_attrs values */
4861 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4862 if (!status) {
4863 /* Increment the clientid slot sequence id */
4864 clp->cl_seqid++;
4865 }
4866
4867 return status;
4868}
4869
4870/*
4871 * Issues a CREATE_SESSION operation to the server.
4872 * It is the responsibility of the caller to verify the session is
4873 * expired before calling this routine.
4874 */
f26468fb 4875int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4876{
4877 int status;
4878 unsigned *ptr;
fc931582
AA		 4879 struct nfs4_session *session = clp->cl_session;
4880
4881 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4882
4883 status = _nfs4_proc_create_session(clp);
4884 if (status)
4885 goto out;
4886
f26468fb
TM		 4887 /* Init and reset the fore channel */
4888 status = nfs4_init_slot_tables(session);
4889 dprintk("slot table initialization returned %d\n", status);
4890 if (status)
4891 goto out;
4892 status = nfs4_reset_slot_tables(session);
4893 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4894 if (status)
4895 goto out;
4896
4897 ptr = (unsigned *)&session->sess_id.data[0];
4898 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4899 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4900out:
4901 dprintk("<-- %s\n", __func__);
4902 return status;
4903}
4904
0f3e66c6
AA		 4905/*
4906 * Issue the over-the-wire RPC DESTROY_SESSION.
4907 * The caller must serialize access to this routine.
4908 */
4909int nfs4_proc_destroy_session(struct nfs4_session *session)
4910{
4911 int status = 0;
4912 struct rpc_message msg;
4913
4914 dprintk("--> nfs4_proc_destroy_session\n");
4915
4916 /* session is still being setup */
4917 if (session->clp->cl_cons_state != NFS_CS_READY)
4918 return status;
4919
4920 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4921 msg.rpc_argp = session;
4922 msg.rpc_resp = NULL;
4923 msg.rpc_cred = NULL;
4924 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4925
4926 if (status)
4927 printk(KERN_WARNING
4928 "Got error %d from the server on DESTROY_SESSION. "
4929 "Session has been destroyed regardless...\n", status);
4930
4931 dprintk("<-- nfs4_proc_destroy_session\n");
4932 return status;
4933}
4934
fccba804
TM		 4935int nfs4_init_session(struct nfs_server *server)
4936{
4937 struct nfs_client *clp = server->nfs_client;
2449ea2e 4938 struct nfs4_session *session;
fccba804
TM		 4939 int ret;
4940
4941 if (!nfs4_has_session(clp))
4942 return 0;
4943
2449ea2e
AB		 4944 session = clp->cl_session;
4945 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4946 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4947
fccba804
TM		 4948 ret = nfs4_recover_expired_lease(server);
4949 if (!ret)
4950 ret = nfs4_check_client_ready(clp);
4951 return ret;
4952}
4953
fc01cea9
AA		 4954/*
4955 * Renew the cl_session lease.
4956 */
4957static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4958{
4959 struct nfs4_sequence_args args;
4960 struct nfs4_sequence_res res;
4961
4962 struct rpc_message msg = {
4963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4964 .rpc_argp = &args,
4965 .rpc_resp = &res,
4966 .rpc_cred = cred,
4967 };
4968
4969 args.sa_cache_this = 0;
4970
4971 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
b257957e 4972 &res, args.sa_cache_this, 1);
fc01cea9
AA		 4973}
4974
4975void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4976{
4977 struct nfs_client *clp = (struct nfs_client *)data;
4978
4979 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4980
4981 if (task->tk_status < 0) {
4982 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4983
4984 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4985 == -EAGAIN) {
0110ee15 4986 nfs_restart_rpc(task, clp);
fc01cea9
AA		 4987 return;
4988 }
4989 }
fc01cea9
AA		 4990 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4991
fc01cea9
AA		 4992 kfree(task->tk_msg.rpc_argp);
4993 kfree(task->tk_msg.rpc_resp);
4994
4995 dprintk("<-- %s\n", __func__);
4996}
4997
4998static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4999{
5000 struct nfs_client *clp;
5001 struct nfs4_sequence_args *args;
5002 struct nfs4_sequence_res *res;
5003
5004 clp = (struct nfs_client *)data;
5005 args = task->tk_msg.rpc_argp;
5006 res = task->tk_msg.rpc_resp;
5007
5008 if (nfs4_setup_sequence(clp, args, res, 0, task))
5009 return;
5010 rpc_call_start(task);
5011}
5012
5013static const struct rpc_call_ops nfs41_sequence_ops = {
5014 .rpc_call_done = nfs41_sequence_call_done,
5015 .rpc_call_prepare = nfs41_sequence_prepare,
5016};
5017
5018static int nfs41_proc_async_sequence(struct nfs_client *clp,
5019 struct rpc_cred *cred)
5020{
5021 struct nfs4_sequence_args *args;
5022 struct nfs4_sequence_res *res;
5023 struct rpc_message msg = {
5024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5025 .rpc_cred = cred,
5026 };
5027
5028 args = kzalloc(sizeof(*args), GFP_KERNEL);
5029 if (!args)
5030 return -ENOMEM;
5031 res = kzalloc(sizeof(*res), GFP_KERNEL);
5032 if (!res) {
5033 kfree(args);
5034 return -ENOMEM;
5035 }
5036 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
5037 msg.rpc_argp = args;
5038 msg.rpc_resp = res;
5039
5040 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
5041 &nfs41_sequence_ops, (void *)clp);
5042}
5043
fce5c838
RL		 5044struct nfs4_reclaim_complete_data {
5045 struct nfs_client *clp;
5046 struct nfs41_reclaim_complete_args arg;
5047 struct nfs41_reclaim_complete_res res;
5048};
5049
5050static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5051{
5052 struct nfs4_reclaim_complete_data *calldata = data;
5053
b257957e 5054 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
fce5c838
RL		 5055 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
5056 &calldata->res.seq_res, 0, task))
5057 return;
5058
5059 rpc_call_start(task);
5060}
5061
5062static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5063{
5064 struct nfs4_reclaim_complete_data *calldata = data;
5065 struct nfs_client *clp = calldata->clp;
5066 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5067
5068 dprintk("--> %s\n", __func__);
5069 nfs41_sequence_done(clp, res, task->tk_status);
5070 switch (task->tk_status) {
5071 case 0:
5072 case -NFS4ERR_COMPLETE_ALREADY:
5073 break;
5074 case -NFS4ERR_BADSESSION:
5075 case -NFS4ERR_DEADSESSION:
5076 /*
5077 * Handle the session error, but do not retry the operation, as
5078 * we have no way of telling whether the clientid had to be
5079 * reset before we got our reply. If reset, a new wave of
5080 * reclaim operations will follow, containing their own reclaim
5081 * complete. We don't want our retry to get on the way of
5082 * recovery by incorrectly indicating to the server that we're
5083 * done reclaiming state since the process had to be restarted.
5084 */
5085 _nfs4_async_handle_error(task, NULL, clp, NULL);
5086 break;
5087 default:
5088 if (_nfs4_async_handle_error(
5089 task, NULL, clp, NULL) == -EAGAIN) {
5090 rpc_restart_call_prepare(task);
5091 return;
5092 }
5093 }
fce5c838
RL		 5094
5095 dprintk("<-- %s\n", __func__);
5096}
5097
5098static void nfs4_free_reclaim_complete_data(void *data)
5099{
5100 struct nfs4_reclaim_complete_data *calldata = data;
5101
5102 kfree(calldata);
5103}
5104
5105static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5106 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5107 .rpc_call_done = nfs4_reclaim_complete_done,
5108 .rpc_release = nfs4_free_reclaim_complete_data,
5109};
5110
5111/*
5112 * Issue a global reclaim complete.
5113 */
5114static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5115{
5116 struct nfs4_reclaim_complete_data *calldata;
5117 struct rpc_task *task;
5118 struct rpc_message msg = {
5119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5120 };
5121 struct rpc_task_setup task_setup_data = {
5122 .rpc_client = clp->cl_rpcclient,
5123 .rpc_message = &msg,
5124 .callback_ops = &nfs4_reclaim_complete_call_ops,
5125 .flags = RPC_TASK_ASYNC,
5126 };
5127 int status = -ENOMEM;
5128
5129 dprintk("--> %s\n", __func__);
5130 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
5131 if (calldata == NULL)
5132 goto out;
5133 calldata->clp = clp;
5134 calldata->arg.one_fs = 0;
5135 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5136
5137 msg.rpc_argp = &calldata->arg;
5138 msg.rpc_resp = &calldata->res;
5139 task_setup_data.callback_data = calldata;
5140 task = rpc_run_task(&task_setup_data);
5141 if (IS_ERR(task))
5142 status = PTR_ERR(task);
5143 rpc_put_task(task);
5144out:
5145 dprintk("<-- %s status=%d\n", __func__, status);
5146 return status;
5147}
557134a3
AA		 5148#endif /* CONFIG_NFS_V4_1 */
5149
591d71cb 5150struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5151 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5152 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5153 .recover_open = nfs4_open_reclaim,
5154 .recover_lock = nfs4_lock_reclaim,
591d71cb 5155 .establish_clid = nfs4_init_clientid,
90a16617 5156 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5157};
5158
591d71cb
AA		 5159#if defined(CONFIG_NFS_V4_1)
5160struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5161 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5162 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5163 .recover_open = nfs4_open_reclaim,
5164 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5165 .establish_clid = nfs41_init_clientid,
b4b82607 5166 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5167 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5168};
5169#endif /* CONFIG_NFS_V4_1 */
5170
5171struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5172 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5173 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5174 .recover_open = nfs4_open_expired,
5175 .recover_lock = nfs4_lock_expired,
5176 .establish_clid = nfs4_init_clientid,
90a16617 5177 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5178};
5179
5180#if defined(CONFIG_NFS_V4_1)
5181struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5182 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5183 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5184 .recover_open = nfs4_open_expired,
5185 .recover_lock = nfs4_lock_expired,
4d643d1d 5186 .establish_clid = nfs41_init_clientid,
b4b82607 5187 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5188};
591d71cb 5189#endif /* CONFIG_NFS_V4_1 */
1da177e4 5190
29fba38b
BH		 5191struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5192 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5193 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5194 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5195};
5196
5197#if defined(CONFIG_NFS_V4_1)
5198struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5199 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5200 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5201 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5202};
5203#endif
5204
5205/*
5206 * Per minor version reboot and network partition recovery ops
5207 */
5208
591d71cb
AA		 5209struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5210 &nfs40_reboot_recovery_ops,
5211#if defined(CONFIG_NFS_V4_1)
5212 &nfs41_reboot_recovery_ops,
5213#endif
5214};
5215
5216struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5217 &nfs40_nograce_recovery_ops,
5218#if defined(CONFIG_NFS_V4_1)
5219 &nfs41_nograce_recovery_ops,
5220#endif
5221};
5222
29fba38b
BH		 5223struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5224 &nfs40_state_renewal_ops,
5225#if defined(CONFIG_NFS_V4_1)
5226 &nfs41_state_renewal_ops,
5227#endif
5228};
5229
92e1d5be 5230static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5231 .permission = nfs_permission,
5232 .getattr = nfs_getattr,
5233 .setattr = nfs_setattr,
5234 .getxattr = nfs4_getxattr,
5235 .setxattr = nfs4_setxattr,
5236 .listxattr = nfs4_listxattr,
5237};
5238
509de811 5239const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5240 .version = 4, /* protocol version */
5241 .dentry_ops = &nfs4_dentry_operations,
5242 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5243 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5244 .getroot = nfs4_proc_get_root,
5245 .getattr = nfs4_proc_getattr,
5246 .setattr = nfs4_proc_setattr,
2b3de441 5247 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5248 .lookup = nfs4_proc_lookup,
5249 .access = nfs4_proc_access,
5250 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5251 .create = nfs4_proc_create,
5252 .remove = nfs4_proc_remove,
5253 .unlink_setup = nfs4_proc_unlink_setup,
5254 .unlink_done = nfs4_proc_unlink_done,
5255 .rename = nfs4_proc_rename,
5256 .link = nfs4_proc_link,
5257 .symlink = nfs4_proc_symlink,
5258 .mkdir = nfs4_proc_mkdir,
5259 .rmdir = nfs4_proc_remove,
5260 .readdir = nfs4_proc_readdir,
5261 .mknod = nfs4_proc_mknod,
5262 .statfs = nfs4_proc_statfs,
5263 .fsinfo = nfs4_proc_fsinfo,
5264 .pathconf = nfs4_proc_pathconf,
e9326dca 5265 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5266 .decode_dirent = nfs4_decode_dirent,
5267 .read_setup = nfs4_proc_read_setup,
ec06c096 5268 .read_done = nfs4_read_done,
1da177e4 5269 .write_setup = nfs4_proc_write_setup,
788e7a89 5270 .write_done = nfs4_write_done,
1da177e4 5271 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5272 .commit_done = nfs4_commit_done,
1da177e4 5273 .lock = nfs4_proc_lock,
e50a1c2e 5274 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5275 .close_context = nfs4_close_context,
1da177e4
LT		 5276};
5277
5278/*
5279 * Local variables:
5280 * c-basic-offset: 8
5281 * End:
5282 */
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