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NFSv4.1: Make nfs4_setup_sequence take a nfs_server argument
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 68static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 69static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 70static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 71static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 73static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
1da177e4 76
1da177e4 77/* Prevent leaks of NFSv4 errors into userland */
46f72f57 78static int nfs4_map_errors(int err)
1da177e4 79{
52567b03
TM		 80 if (err >= -1000)
81 return err;
82 switch (err) {
83 case -NFS4ERR_RESOURCE:
84 return -EREMOTEIO;
85 default:
1da177e4 86 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 87 __func__, -err);
52567b03 88 break;
1da177e4 89 }
52567b03 90 return -EIO;
1da177e4
LT		 91}
92
93/*
94 * This is our standard bitmap for GETATTR requests.
95 */
96const u32 nfs4_fattr_bitmap[2] = {
97 FATTR4_WORD0_TYPE
98 | FATTR4_WORD0_CHANGE
99 | FATTR4_WORD0_SIZE
100 | FATTR4_WORD0_FSID
101 | FATTR4_WORD0_FILEID,
102 FATTR4_WORD1_MODE
103 | FATTR4_WORD1_NUMLINKS
104 | FATTR4_WORD1_OWNER
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
111};
112
113const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
120};
121
4ce79717 122const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 123 FATTR4_WORD0_MAXLINK
124 | FATTR4_WORD0_MAXNAME,
125 0
126};
127
128const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
132 0
133};
134
830b8e33
MN		 135const u32 nfs4_fs_locations_bitmap[2] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
152};
153
bc4785cd 154static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 155 struct nfs4_readdir_arg *readdir)
156{
0dbb4c67 157 __be32 *start, *p;
1da177e4
LT		 158
159 BUG_ON(readdir->count < 80);
160 if (cookie > 2) {
b7ef1956 161 readdir->cookie = cookie;
1da177e4
LT		 162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
163 return;
164 }
165
166 readdir->cookie = 0;
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
168 if (cookie == 2)
169 return;
170
171 /*
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
176 * instead of 1 or 2.
177 */
0dbb4c67 178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 179
180 if (cookie == 0) {
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
186 p++;
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
4e769b93 190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 191 }
192
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
198 p++;
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
4e769b93 202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 203
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
207}
208
65de872e
TM		 209static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210{
211 int res;
212
213 might_sleep();
214
e005e804 215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 216 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 217 return res;
218}
219
220static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
221{
222 int res = 0;
223
224 might_sleep();
225
226 if (*timeout <= 0)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
232 res = -ERESTARTSYS;
233 *timeout <<= 1;
234 return res;
235}
236
237/* This is the error handling routine for processes that are allowed
238 * to sleep.
239 */
240static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241{
242 struct nfs_client *clp = server->nfs_client;
9e33bed5 243 struct nfs4_state *state = exception->state;
65de872e
TM		 244 int ret = errorcode;
245
246 exception->retry = 0;
247 switch(errorcode) {
248 case 0:
249 return 0;
9e33bed5
TM		 250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
253 if (state == NULL)
254 break;
255 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 256 goto do_state_recovery;
65de872e 257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
65de872e 262 case -NFS4ERR_EXPIRED:
a2c0b9e2 263 goto do_state_recovery;
03391693 264#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 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;
03391693 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:
2c643488 288 case -EKEYEXPIRED:
65de872e
TM		 289 ret = nfs4_delay(server->client, &exception->timeout);
290 if (ret != 0)
291 break;
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
294 }
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
a2c0b9e2
TM		 297do_state_recovery:
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
300 if (ret == 0)
301 exception->retry = 1;
302 return ret;
65de872e
TM		 303}
304
305
26e976a8 306static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 307{
7539bbab 308 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 309 spin_lock(&clp->cl_lock);
310 if (time_before(clp->cl_last_renewal,timestamp))
311 clp->cl_last_renewal = timestamp;
312 spin_unlock(&clp->cl_lock);
313}
314
cccef3b9
AA		 315#if defined(CONFIG_NFS_V4_1)
316
e2c4ab3c
AA		 317/*
318 * nfs4_free_slot - free a slot and efficiently update slot table.
319 *
320 * freeing a slot is trivially done by clearing its respective bit
321 * in the bitmap.
322 * If the freed slotid equals highest_used_slotid we want to update it
323 * so that the server would be able to size down the slot table if needed,
324 * otherwise we know that the highest_used_slotid is still in use.
325 * When updating highest_used_slotid there may be "holes" in the bitmap
326 * so we need to scan down from highest_used_slotid to 0 looking for the now
327 * highest slotid in use.
328 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 329 *
330 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 331 */
332static void
333nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
334{
335 int slotid = free_slotid;
336
e2c4ab3c
AA		 337 /* clear used bit in bitmap */
338 __clear_bit(slotid, tbl->used_slots);
339
340 /* update highest_used_slotid when it is freed */
341 if (slotid == tbl->highest_used_slotid) {
342 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 343 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 344 tbl->highest_used_slotid = slotid;
345 else
346 tbl->highest_used_slotid = -1;
347 }
e2c4ab3c
AA		 348 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
349 free_slotid, tbl->highest_used_slotid);
350}
351
3bfb0fc5
AB		 352/*
353 * Signal state manager thread if session is drained
354 */
355static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
356{
689cf5c1
AB		 357 struct rpc_task *task;
358
3bfb0fc5 359 if (!test_bit(NFS4CLNT_SESSION_DRAINING, &ses->clp->cl_state)) {
689cf5c1
AB		 360 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
361 if (task)
362 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 363 return;
364 }
365
366 if (ses->fc_slot_table.highest_used_slotid != -1)
367 return;
368
369 dprintk("%s COMPLETE: Session Drained\n", __func__);
370 complete(&ses->complete);
371}
372
d185a334 373static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 374{
375 struct nfs4_slot_table *tbl;
376
d185a334 377 tbl = &res->sr_session->fc_slot_table;
13615871 378 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
13615871
AA		 379 /* just wake up the next guy waiting since
380 * we may have not consumed a slot after all */
691daf3b 381 dprintk("%s: No slot\n", __func__);
35dc1d74 382 return;
13615871 383 }
ea028ac9 384
35dc1d74
TM		 385 spin_lock(&tbl->slot_tbl_lock);
386 nfs4_free_slot(tbl, res->sr_slotid);
d185a334 387 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74
TM		 388 spin_unlock(&tbl->slot_tbl_lock);
389 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
13615871
AA		 390}
391
d185a334 392static void nfs41_sequence_done(struct nfs4_sequence_res *res)
b0df806c
AA		 393{
394 unsigned long timestamp;
395 struct nfs4_slot_table *tbl;
396 struct nfs4_slot *slot;
397
398 /*
399 * sr_status remains 1 if an RPC level error occurred. The server
400 * may or may not have processed the sequence operation..
401 * Proceed as if the server received and processed the sequence
402 * operation.
403 */
404 if (res->sr_status == 1)
405 res->sr_status = NFS_OK;
406
407 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
408 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
409 goto out;
410
691daf3b 411 /* Check the SEQUENCE operation status */
b0df806c 412 if (res->sr_status == 0) {
d185a334
TM		 413 struct nfs_client *clp = res->sr_session->clp;
414 tbl = &res->sr_session->fc_slot_table;
691daf3b 415 slot = tbl->slots + res->sr_slotid;
b0df806c
AA		 416 /* Update the slot's sequence and clientid lease timer */
417 ++slot->seq_nr;
418 timestamp = res->sr_renewal_time;
419 spin_lock(&clp->cl_lock);
420 if (time_before(clp->cl_last_renewal, timestamp))
421 clp->cl_last_renewal = timestamp;
422 spin_unlock(&clp->cl_lock);
0629e370 423 /* Check sequence flags */
7135840f
AB		 424 if (atomic_read(&clp->cl_count) > 1)
425 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
b0df806c
AA		 426 }
427out:
428 /* The session may be reset by one of the error handlers. */
429 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 430 nfs41_sequence_free_slot(res);
b0df806c
AA		 431}
432
510b8175
BH		 433/*
434 * nfs4_find_slot - efficiently look for a free slot
435 *
436 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
437 * If found, we mark the slot as used, update the highest_used_slotid,
438 * and respectively set up the sequence operation args.
439 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 440 *
441 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 442 */
443static u8
40ead580 444nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 445{
446 int slotid;
447 u8 ret_id = NFS4_MAX_SLOT_TABLE;
448 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
449
510b8175
BH		 450 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
451 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
452 tbl->max_slots);
453 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
454 if (slotid >= tbl->max_slots)
455 goto out;
456 __set_bit(slotid, tbl->used_slots);
457 if (slotid > tbl->highest_used_slotid)
458 tbl->highest_used_slotid = slotid;
459 ret_id = slotid;
460out:
461 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
462 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 463 return ret_id;
464}
465
ce5039c1
AA		 466static int nfs41_setup_sequence(struct nfs4_session *session,
467 struct nfs4_sequence_args *args,
468 struct nfs4_sequence_res *res,
469 int cache_reply,
470 struct rpc_task *task)
471{
fbcd4abc
AA		 472 struct nfs4_slot *slot;
473 struct nfs4_slot_table *tbl;
474 u8 slotid;
475
476 dprintk("--> %s\n", __func__);
ce5039c1
AA		 477 /* slot already allocated? */
478 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
479 return 0;
480
ce5039c1 481 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 482 tbl = &session->fc_slot_table;
483
484 spin_lock(&tbl->slot_tbl_lock);
5601a00d
AB		 485 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state) &&
486 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 487 /*
488 * The state manager will wait until the slot table is empty.
489 * Schedule the reset thread
490 */
05f0d236 491 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 492 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 493 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 494 return -EAGAIN;
b069d94a
AA		 495 }
496
689cf5c1
AB		 497 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
498 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
499 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
500 spin_unlock(&tbl->slot_tbl_lock);
501 dprintk("%s enforce FIFO order\n", __func__);
502 return -EAGAIN;
503 }
504
40ead580 505 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 506 if (slotid == NFS4_MAX_SLOT_TABLE) {
507 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
508 spin_unlock(&tbl->slot_tbl_lock);
509 dprintk("<-- %s: no free slots\n", __func__);
510 return -EAGAIN;
511 }
512 spin_unlock(&tbl->slot_tbl_lock);
513
689cf5c1 514 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 515 slot = tbl->slots + slotid;
99fe60d0 516 args->sa_session = session;
fbcd4abc
AA		 517 args->sa_slotid = slotid;
518 args->sa_cache_this = cache_reply;
519
520 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
521
99fe60d0 522 res->sr_session = session;
fbcd4abc
AA		 523 res->sr_slotid = slotid;
524 res->sr_renewal_time = jiffies;
2a6e26cd 525 res->sr_status_flags = 0;
fbcd4abc
AA		 526 /*
527 * sr_status is only set in decode_sequence, and so will remain
528 * set to 1 if an rpc level failure occurs.
529 */
530 res->sr_status = 1;
ce5039c1
AA		 531 return 0;
532}
533
035168ab 534int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 535 struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res,
537 int cache_reply,
538 struct rpc_task *task)
539{
035168ab 540 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 541 int ret = 0;
542
035168ab
TM		 543 if (session == NULL) {
544 args->sa_session = NULL;
545 res->sr_session = NULL;
546 goto out;
547 }
548
ce5039c1 549 dprintk("--> %s clp %p session %p sr_slotid %d\n",
035168ab 550 __func__, session->clp, session, res->sr_slotid);
ce5039c1 551
035168ab 552 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 553 task);
ce5039c1
AA		 554out:
555 dprintk("<-- %s status=%d\n", __func__, ret);
556 return ret;
557}
558
559struct nfs41_call_sync_data {
035168ab 560 const struct nfs_server *seq_server;
ce5039c1
AA		 561 struct nfs4_sequence_args *seq_args;
562 struct nfs4_sequence_res *seq_res;
563 int cache_reply;
564};
565
566static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
567{
568 struct nfs41_call_sync_data *data = calldata;
569
035168ab
TM		 570 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
571
572 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 573 data->seq_res, data->cache_reply, task))
574 return;
575 rpc_call_start(task);
576}
577
b257957e
AB		 578static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
579{
580 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
581 nfs41_call_sync_prepare(task, calldata);
582}
583
69ab40c4
AA		 584static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
585{
586 struct nfs41_call_sync_data *data = calldata;
587
d185a334 588 nfs41_sequence_done(data->seq_res);
69ab40c4
AA		 589}
590
ce5039c1
AA		 591struct rpc_call_ops nfs41_call_sync_ops = {
592 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 593 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 594};
595
b257957e
AB		 596struct rpc_call_ops nfs41_call_priv_sync_ops = {
597 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
598 .rpc_call_done = nfs41_call_sync_done,
599};
600
035168ab 601static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 602 struct rpc_message *msg,
603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
b257957e
AB		 605 int cache_reply,
606 int privileged)
ce5039c1
AA		 607{
608 int ret;
609 struct rpc_task *task;
610 struct nfs41_call_sync_data data = {
035168ab 611 .seq_server = server,
ce5039c1
AA		 612 .seq_args = args,
613 .seq_res = res,
614 .cache_reply = cache_reply,
615 };
616 struct rpc_task_setup task_setup = {
035168ab 617 .rpc_client = server->client,
ce5039c1
AA		 618 .rpc_message = msg,
619 .callback_ops = &nfs41_call_sync_ops,
620 .callback_data = &data
621 };
622
623 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
b257957e
AB		 624 if (privileged)
625 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 626 task = rpc_run_task(&task_setup);
627 if (IS_ERR(task))
628 ret = PTR_ERR(task);
629 else {
630 ret = task->tk_status;
631 rpc_put_task(task);
632 }
633 return ret;
634}
635
cccef3b9
AA		 636int _nfs4_call_sync_session(struct nfs_server *server,
637 struct rpc_message *msg,
638 struct nfs4_sequence_args *args,
639 struct nfs4_sequence_res *res,
640 int cache_reply)
641{
035168ab 642 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 643}
644
645#endif /* CONFIG_NFS_V4_1 */
646
647int _nfs4_call_sync(struct nfs_server *server,
648 struct rpc_message *msg,
649 struct nfs4_sequence_args *args,
650 struct nfs4_sequence_res *res,
651 int cache_reply)
652{
f3752975 653 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 654 return rpc_call_sync(server->client, msg, 0);
655}
656
657#define nfs4_call_sync(server, msg, args, res, cache_reply) \
658 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
659 &(res)->seq_res, (cache_reply))
660
b0df806c
AA		 661static void nfs4_sequence_done(const struct nfs_server *server,
662 struct nfs4_sequence_res *res, int rpc_status)
663{
664#ifdef CONFIG_NFS_V4_1
665 if (nfs4_has_session(server->nfs_client))
d185a334 666 nfs41_sequence_done(res);
b0df806c
AA		 667#endif /* CONFIG_NFS_V4_1 */
668}
669
38478b24 670static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 671{
38478b24 672 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 673
38478b24 674 spin_lock(&dir->i_lock);
40d24704
TM		 675 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
676 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 677 nfs_force_lookup_revalidate(dir);
40d24704 678 nfsi->change_attr = cinfo->after;
38478b24 679 spin_unlock(&dir->i_lock);
1da177e4
LT		 680}
681
e56e0b78 682struct nfs4_opendata {
c6d00e63 683 struct kref kref;
e56e0b78
TM		 684 struct nfs_openargs o_arg;
685 struct nfs_openres o_res;
cdd4e68b
TM		 686 struct nfs_open_confirmargs c_arg;
687 struct nfs_open_confirmres c_res;
e56e0b78
TM		 688 struct nfs_fattr f_attr;
689 struct nfs_fattr dir_attr;
ad389da7 690 struct path path;
e56e0b78
TM		 691 struct dentry *dir;
692 struct nfs4_state_owner *owner;
aac00a8d 693 struct nfs4_state *state;
e56e0b78 694 struct iattr attrs;
26e976a8 695 unsigned long timestamp;
3e309914 696 unsigned int rpc_done : 1;
24ac23ab
TM		 697 int rpc_status;
698 int cancelled;
e56e0b78
TM		 699};
700
2ced46c2
TM		 701
702static void nfs4_init_opendata_res(struct nfs4_opendata *p)
703{
704 p->o_res.f_attr = &p->f_attr;
705 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 706 p->o_res.seqid = p->o_arg.seqid;
707 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 708 p->o_res.server = p->o_arg.server;
709 nfs_fattr_init(&p->f_attr);
710 nfs_fattr_init(&p->dir_attr);
578e4585 711 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 712}
713
ad389da7 714static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 715 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 716 const struct iattr *attrs,
717 gfp_t gfp_mask)
e56e0b78 718{
ad389da7 719 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 720 struct inode *dir = parent->d_inode;
721 struct nfs_server *server = NFS_SERVER(dir);
722 struct nfs4_opendata *p;
723
8535b2be 724 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 725 if (p == NULL)
726 goto err;
8535b2be 727 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 728 if (p->o_arg.seqid == NULL)
729 goto err_free;
f6948697
AV		 730 path_get(path);
731 p->path = *path;
e56e0b78
TM		 732 p->dir = parent;
733 p->owner = sp;
734 atomic_inc(&sp->so_count);
735 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 736 p->o_arg.open_flags = flags;
737 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 738 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 739 p->o_arg.id = sp->so_owner_id.id;
ad389da7 740 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 741 p->o_arg.server = server;
742 p->o_arg.bitmask = server->attr_bitmask;
743 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78 744 if (flags & O_EXCL) {
4882ef72
AB		 745 if (nfs4_has_persistent_session(server->nfs_client)) {
746 /* GUARDED */
747 p->o_arg.u.attrs = &p->attrs;
748 memcpy(&p->attrs, attrs, sizeof(p->attrs));
749 } else { /* EXCLUSIVE4_1 */
750 u32 *s = (u32 *) p->o_arg.u.verifier.data;
751 s[0] = jiffies;
752 s[1] = current->pid;
753 }
e56e0b78
TM		 754 } else if (flags & O_CREAT) {
755 p->o_arg.u.attrs = &p->attrs;
756 memcpy(&p->attrs, attrs, sizeof(p->attrs));
757 }
cdd4e68b
TM		 758 p->c_arg.fh = &p->o_res.fh;
759 p->c_arg.stateid = &p->o_res.stateid;
760 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 761 nfs4_init_opendata_res(p);
c6d00e63 762 kref_init(&p->kref);
e56e0b78
TM		 763 return p;
764err_free:
765 kfree(p);
766err:
767 dput(parent);
768 return NULL;
769}
770
c6d00e63 771static void nfs4_opendata_free(struct kref *kref)
e56e0b78 772{
c6d00e63
TM		 773 struct nfs4_opendata *p = container_of(kref,
774 struct nfs4_opendata, kref);
775
776 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 777 if (p->state != NULL)
778 nfs4_put_open_state(p->state);
c6d00e63
TM		 779 nfs4_put_state_owner(p->owner);
780 dput(p->dir);
31f31db1 781 path_put(&p->path);
c6d00e63
TM		 782 kfree(p);
783}
784
785static void nfs4_opendata_put(struct nfs4_opendata *p)
786{
787 if (p != NULL)
788 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 789}
790
06f814a3
TM		 791static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
792{
06f814a3
TM		 793 int ret;
794
06f814a3 795 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 796 return ret;
797}
798
dc0b027d 799static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 800{
801 int ret = 0;
dc0b027d
TM		 802
803 if (open_mode & O_EXCL)
804 goto out;
805 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 806 case FMODE_READ:
88069f77
TM		 807 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
808 && state->n_rdonly != 0;
6ee41268
TM		 809 break;
810 case FMODE_WRITE:
88069f77
TM		 811 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
812 && state->n_wronly != 0;
6ee41268
TM		 813 break;
814 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 815 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
816 && state->n_rdwr != 0;
6ee41268 817 }
dc0b027d 818out:
6ee41268
TM		 819 return ret;
820}
821
dc0b027d 822static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 823{
dc0b027d 824 if ((delegation->type & fmode) != fmode)
aac00a8d 825 return 0;
15c831bf 826 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 827 return 0;
b7391f44 828 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 829 return 1;
830}
831
dc0b027d 832static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 833{
dc0b027d 834 switch (fmode) {
e7616923
TM		 835 case FMODE_WRITE:
836 state->n_wronly++;
837 break;
838 case FMODE_READ:
839 state->n_rdonly++;
840 break;
841 case FMODE_READ|FMODE_WRITE:
842 state->n_rdwr++;
843 }
dc0b027d 844 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 845}
846
dc0b027d 847static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 848{
849 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
850 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
851 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 852 switch (fmode) {
003707c7
TM		 853 case FMODE_READ:
854 set_bit(NFS_O_RDONLY_STATE, &state->flags);
855 break;
856 case FMODE_WRITE:
857 set_bit(NFS_O_WRONLY_STATE, &state->flags);
858 break;
859 case FMODE_READ|FMODE_WRITE:
860 set_bit(NFS_O_RDWR_STATE, &state->flags);
861 }
e7616923
TM		 862}
863
dc0b027d 864static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 865{
8bda4e4c 866 write_seqlock(&state->seqlock);
dc0b027d 867 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 868 write_sequnlock(&state->seqlock);
003707c7
TM		 869}
870
dc0b027d 871static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 872{
8bda4e4c
TM		 873 /*
874 * Protect the call to nfs4_state_set_mode_locked and
875 * serialise the stateid update
876 */
877 write_seqlock(&state->seqlock);
003707c7
TM		 878 if (deleg_stateid != NULL) {
879 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
880 set_bit(NFS_DELEGATED_STATE, &state->flags);
881 }
882 if (open_stateid != NULL)
dc0b027d 883 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 884 write_sequnlock(&state->seqlock);
885 spin_lock(&state->owner->so_lock);
dc0b027d 886 update_open_stateflags(state, fmode);
ec073428 887 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 888}
889
dc0b027d 890static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 891{
892 struct nfs_inode *nfsi = NFS_I(state->inode);
893 struct nfs_delegation *deleg_cur;
894 int ret = 0;
895
dc0b027d 896 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 897
898 rcu_read_lock();
899 deleg_cur = rcu_dereference(nfsi->delegation);
900 if (deleg_cur == NULL)
901 goto no_delegation;
902
903 spin_lock(&deleg_cur->lock);
904 if (nfsi->delegation != deleg_cur ||
dc0b027d 905 (deleg_cur->type & fmode) != fmode)
34310430
TM		 906 goto no_delegation_unlock;
907
908 if (delegation == NULL)
909 delegation = &deleg_cur->stateid;
910 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
911 goto no_delegation_unlock;
912
b7391f44 913 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 914 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 915 ret = 1;
916no_delegation_unlock:
917 spin_unlock(&deleg_cur->lock);
918no_delegation:
919 rcu_read_unlock();
920
921 if (!ret && open_stateid != NULL) {
dc0b027d 922 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 923 ret = 1;
924 }
925
926 return ret;
927}
928
929
dc0b027d 930static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 931{
932 struct nfs_delegation *delegation;
933
934 rcu_read_lock();
935 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 936 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 937 rcu_read_unlock();
938 return;
939 }
940 rcu_read_unlock();
941 nfs_inode_return_delegation(inode);
942}
943
6ee41268 944static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 945{
946 struct nfs4_state *state = opendata->state;
947 struct nfs_inode *nfsi = NFS_I(state->inode);
948 struct nfs_delegation *delegation;
dc0b027d
TM		 949 int open_mode = opendata->o_arg.open_flags & O_EXCL;
950 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 951 nfs4_stateid stateid;
952 int ret = -EAGAIN;
953
aac00a8d 954 for (;;) {
dc0b027d 955 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 956 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 957 if (can_open_cached(state, fmode, open_mode)) {
958 update_open_stateflags(state, fmode);
6ee41268 959 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 960 goto out_return_state;
961 }
962 spin_unlock(&state->owner->so_lock);
963 }
34310430
TM		 964 rcu_read_lock();
965 delegation = rcu_dereference(nfsi->delegation);
966 if (delegation == NULL ||
dc0b027d 967 !can_open_delegated(delegation, fmode)) {
34310430 968 rcu_read_unlock();
aac00a8d 969 break;
34310430 970 }
aac00a8d
TM		 971 /* Save the delegation */
972 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
973 rcu_read_unlock();
af22f94a 974 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 975 if (ret != 0)
976 goto out;
977 ret = -EAGAIN;
34310430
TM		 978
979 /* Try to update the stateid using the delegation */
dc0b027d 980 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 981 goto out_return_state;
aac00a8d 982 }
aac00a8d
TM		 983out:
984 return ERR_PTR(ret);
985out_return_state:
986 atomic_inc(&state->count);
987 return state;
988}
989
24ac23ab
TM		 990static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
991{
992 struct inode *inode;
993 struct nfs4_state *state = NULL;
003707c7 994 struct nfs_delegation *delegation;
1b370bc2 995 int ret;
24ac23ab 996
aac00a8d 997 if (!data->rpc_done) {
6ee41268 998 state = nfs4_try_open_cached(data);
aac00a8d
TM		 999 goto out;
1000 }
1001
1b370bc2 1002 ret = -EAGAIN;
24ac23ab 1003 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1004 goto err;
24ac23ab 1005 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1006 ret = PTR_ERR(inode);
03f28e3a 1007 if (IS_ERR(inode))
1b370bc2
TM		 1008 goto err;
1009 ret = -ENOMEM;
24ac23ab
TM		 1010 state = nfs4_get_open_state(inode, data->owner);
1011 if (state == NULL)
1b370bc2 1012 goto err_put_inode;
549d6ed5 1013 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1014 int delegation_flags = 0;
1015
003707c7
TM		 1016 rcu_read_lock();
1017 delegation = rcu_dereference(NFS_I(inode)->delegation);
1018 if (delegation)
1019 delegation_flags = delegation->flags;
1020 rcu_read_unlock();
15c831bf 1021 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1022 nfs_inode_set_delegation(state->inode,
1023 data->owner->so_cred,
1024 &data->o_res);
1025 else
1026 nfs_inode_reclaim_delegation(state->inode,
1027 data->owner->so_cred,
1028 &data->o_res);
1029 }
34310430
TM		 1030
1031 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1032 data->o_arg.fmode);
24ac23ab 1033 iput(inode);
aac00a8d 1034out:
24ac23ab 1035 return state;
1b370bc2
TM		 1036err_put_inode:
1037 iput(inode);
1038err:
1039 return ERR_PTR(ret);
24ac23ab
TM		 1040}
1041
864472e9
TM		 1042static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1043{
1044 struct nfs_inode *nfsi = NFS_I(state->inode);
1045 struct nfs_open_context *ctx;
1046
1047 spin_lock(&state->inode->i_lock);
1048 list_for_each_entry(ctx, &nfsi->open_files, list) {
1049 if (ctx->state != state)
1050 continue;
1051 get_nfs_open_context(ctx);
1052 spin_unlock(&state->inode->i_lock);
1053 return ctx;
1054 }
1055 spin_unlock(&state->inode->i_lock);
1056 return ERR_PTR(-ENOENT);
1057}
1058
6f220ed5
TM		 1059static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1060{
1061 struct nfs4_opendata *opendata;
1062
8535b2be 1063 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1064 if (opendata == NULL)
1065 return ERR_PTR(-ENOMEM);
1066 opendata->state = state;
1067 atomic_inc(&state->count);
1068 return opendata;
1069}
1070
dc0b027d 1071static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1072{
2ced46c2 1073 struct nfs4_state *newstate;
864472e9
TM		 1074 int ret;
1075
dc0b027d
TM		 1076 opendata->o_arg.open_flags = 0;
1077 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1078 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1079 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1080 nfs4_init_opendata_res(opendata);
b257957e 1081 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1082 if (ret != 0)
1083 return ret;
2ced46c2 1084 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1085 if (IS_ERR(newstate))
1086 return PTR_ERR(newstate);
dc0b027d 1087 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1088 *res = newstate;
864472e9
TM		 1089 return 0;
1090}
1091
1092static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1093{
864472e9 1094 struct nfs4_state *newstate;
864472e9
TM		 1095 int ret;
1096
1097 /* memory barrier prior to reading state->n_* */
2ced46c2 1098 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1099 smp_rmb();
1100 if (state->n_rdwr != 0) {
2ced46c2 1101 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1102 if (ret != 0)
1103 return ret;
2ced46c2
TM		 1104 if (newstate != state)
1105 return -ESTALE;
864472e9
TM		 1106 }
1107 if (state->n_wronly != 0) {
2ced46c2 1108 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1109 if (ret != 0)
1110 return ret;
2ced46c2
TM		 1111 if (newstate != state)
1112 return -ESTALE;
864472e9
TM		 1113 }
1114 if (state->n_rdonly != 0) {
2ced46c2 1115 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1116 if (ret != 0)
1117 return ret;
2ced46c2
TM		 1118 if (newstate != state)
1119 return -ESTALE;
864472e9 1120 }
1ac7e2fd
TM		 1121 /*
1122 * We may have performed cached opens for all three recoveries.
1123 * Check if we need to update the current stateid.
1124 */
1125 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1126 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1127 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1128 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1129 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1130 write_sequnlock(&state->seqlock);
1ac7e2fd 1131 }
864472e9
TM		 1132 return 0;
1133}
1134
1da177e4
LT		 1135/*
1136 * OPEN_RECLAIM:
1137 * reclaim state on the server after a reboot.
1da177e4 1138 */
539cd03a 1139static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1140{
1ac7e2fd 1141 struct nfs_delegation *delegation;
864472e9 1142 struct nfs4_opendata *opendata;
dc0b027d 1143 fmode_t delegation_type = 0;
1da177e4
LT		 1144 int status;
1145
6f220ed5
TM		 1146 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1147 if (IS_ERR(opendata))
1148 return PTR_ERR(opendata);
864472e9
TM		 1149 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1150 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1151 rcu_read_lock();
1152 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1153 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1154 delegation_type = delegation->type;
1ac7e2fd 1155 rcu_read_unlock();
864472e9
TM		 1156 opendata->o_arg.u.delegation_type = delegation_type;
1157 status = nfs4_open_recover(opendata, state);
c6d00e63 1158 nfs4_opendata_put(opendata);
1da177e4
LT		 1159 return status;
1160}
1161
539cd03a 1162static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1163{
1164 struct nfs_server *server = NFS_SERVER(state->inode);
1165 struct nfs4_exception exception = { };
1166 int err;
1167 do {
539cd03a 1168 err = _nfs4_do_open_reclaim(ctx, state);
2c643488 1169 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 1170 break;
1171 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1172 } while (exception.retry);
1173 return err;
1174}
1175
864472e9
TM		 1176static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1177{
1178 struct nfs_open_context *ctx;
1179 int ret;
1180
1181 ctx = nfs4_state_find_open_context(state);
1182 if (IS_ERR(ctx))
1183 return PTR_ERR(ctx);
539cd03a 1184 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1185 put_nfs_open_context(ctx);
1186 return ret;
1187}
1188
13437e12 1189static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1190{
e56e0b78 1191 struct nfs4_opendata *opendata;
864472e9 1192 int ret;
1da177e4 1193
6f220ed5
TM		 1194 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1195 if (IS_ERR(opendata))
1196 return PTR_ERR(opendata);
e56e0b78 1197 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1198 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1199 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1200 ret = nfs4_open_recover(opendata, state);
c6d00e63 1201 nfs4_opendata_put(opendata);
864472e9 1202 return ret;
1da177e4
LT		 1203}
1204
13437e12 1205int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1206{
1207 struct nfs4_exception exception = { };
539cd03a 1208 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1209 int err;
1210 do {
13437e12 1211 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1212 switch (err) {
1213 case 0:
965b5d67
TM		 1214 case -ENOENT:
1215 case -ESTALE:
1216 goto out;
bcfa49f6
RL		 1217 case -NFS4ERR_BADSESSION:
1218 case -NFS4ERR_BADSLOT:
1219 case -NFS4ERR_BAD_HIGH_SLOT:
1220 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1221 case -NFS4ERR_DEADSESSION:
1222 nfs4_schedule_state_recovery(
1223 server->nfs_client);
1224 goto out;
1da177e4
LT		 1225 case -NFS4ERR_STALE_CLIENTID:
1226 case -NFS4ERR_STALE_STATEID:
1227 case -NFS4ERR_EXPIRED:
1228 /* Don't recall a delegation if it was lost */
7539bbab 1229 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1230 goto out;
1231 case -ERESTARTSYS:
1232 /*
1233 * The show must go on: exit, but mark the
1234 * stateid as needing recovery.
1235 */
1236 case -NFS4ERR_ADMIN_REVOKED:
1237 case -NFS4ERR_BAD_STATEID:
1238 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1239 case -ENOMEM:
1240 err = 0;
1241 goto out;
1da177e4
LT		 1242 }
1243 err = nfs4_handle_exception(server, err, &exception);
1244 } while (exception.retry);
965b5d67 1245out:
1da177e4
LT		 1246 return err;
1247}
1248
cdd4e68b
TM		 1249static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1250{
1251 struct nfs4_opendata *data = calldata;
1252
1253 data->rpc_status = task->tk_status;
1254 if (RPC_ASSASSINATED(task))
1255 return;
26e976a8 1256 if (data->rpc_status == 0) {
cdd4e68b
TM		 1257 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1258 sizeof(data->o_res.stateid.data));
bb22629e 1259 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1260 renew_lease(data->o_res.server, data->timestamp);
3e309914 1261 data->rpc_done = 1;
26e976a8 1262 }
cdd4e68b
TM		 1263}
1264
1265static void nfs4_open_confirm_release(void *calldata)
1266{
1267 struct nfs4_opendata *data = calldata;
1268 struct nfs4_state *state = NULL;
1269
1270 /* If this request hasn't been cancelled, do nothing */
1271 if (data->cancelled == 0)
1272 goto out_free;
1273 /* In case of error, no cleanup! */
3e309914 1274 if (!data->rpc_done)
cdd4e68b 1275 goto out_free;
cdd4e68b 1276 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1277 if (!IS_ERR(state))
dc0b027d 1278 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1279out_free:
c6d00e63 1280 nfs4_opendata_put(data);
cdd4e68b
TM		 1281}
1282
1283static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1284 .rpc_call_done = nfs4_open_confirm_done,
1285 .rpc_release = nfs4_open_confirm_release,
1286};
1287
1288/*
1289 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1290 */
1291static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1292{
1293 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1294 struct rpc_task *task;
5138fde0
TM		 1295 struct rpc_message msg = {
1296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1297 .rpc_argp = &data->c_arg,
1298 .rpc_resp = &data->c_res,
1299 .rpc_cred = data->owner->so_cred,
1300 };
c970aa85
TM		 1301 struct rpc_task_setup task_setup_data = {
1302 .rpc_client = server->client,
5138fde0 1303 .rpc_message = &msg,
c970aa85
TM		 1304 .callback_ops = &nfs4_open_confirm_ops,
1305 .callback_data = data,
101070ca 1306 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1307 .flags = RPC_TASK_ASYNC,
1308 };
1da177e4
LT		 1309 int status;
1310
c6d00e63 1311 kref_get(&data->kref);
3e309914
TM		 1312 data->rpc_done = 0;
1313 data->rpc_status = 0;
5138fde0 1314 data->timestamp = jiffies;
c970aa85 1315 task = rpc_run_task(&task_setup_data);
7a1218a2 1316 if (IS_ERR(task))
cdd4e68b 1317 return PTR_ERR(task);
cdd4e68b
TM		 1318 status = nfs4_wait_for_completion_rpc_task(task);
1319 if (status != 0) {
1320 data->cancelled = 1;
1321 smp_wmb();
1322 } else
1323 status = data->rpc_status;
e6b3c4db 1324 rpc_put_task(task);
1da177e4
LT		 1325 return status;
1326}
1327
24ac23ab 1328static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1329{
24ac23ab
TM		 1330 struct nfs4_opendata *data = calldata;
1331 struct nfs4_state_owner *sp = data->owner;
5138fde0 1332
24ac23ab
TM		 1333 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1334 return;
aac00a8d
TM		 1335 /*
1336 * Check if we still need to send an OPEN call, or if we can use
1337 * a delegation instead.
1338 */
1339 if (data->state != NULL) {
1340 struct nfs_delegation *delegation;
1341
dc0b027d 1342 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1343 goto out_no_action;
aac00a8d
TM		 1344 rcu_read_lock();
1345 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1346 if (delegation != NULL &&
15c831bf 1347 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1348 rcu_read_unlock();
6ee41268 1349 goto out_no_action;
aac00a8d
TM		 1350 }
1351 rcu_read_unlock();
1352 }
24ac23ab 1353 /* Update sequence id. */
9f958ab8 1354 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1355 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1356 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1357 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1358 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1359 }
26e976a8 1360 data->timestamp = jiffies;
035168ab 1361 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1362 &data->o_arg.seq_args,
1363 &data->o_res.seq_res, 1, task))
1364 return;
5138fde0 1365 rpc_call_start(task);
6ee41268
TM		 1366 return;
1367out_no_action:
1368 task->tk_action = NULL;
1369
24ac23ab 1370}
1da177e4 1371
b257957e
AB		 1372static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1373{
1374 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1375 nfs4_open_prepare(task, calldata);
1376}
1377
24ac23ab
TM		 1378static void nfs4_open_done(struct rpc_task *task, void *calldata)
1379{
1380 struct nfs4_opendata *data = calldata;
1da177e4 1381
24ac23ab 1382 data->rpc_status = task->tk_status;
d898528c 1383
d61e612a
TM		 1384 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1385 task->tk_status);
d898528c 1386
24ac23ab
TM		 1387 if (RPC_ASSASSINATED(task))
1388 return;
1389 if (task->tk_status == 0) {
1390 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1391 case S_IFREG:
1392 break;
1393 case S_IFLNK:
24ac23ab 1394 data->rpc_status = -ELOOP;
6f926b5b
TM		 1395 break;
1396 case S_IFDIR:
24ac23ab 1397 data->rpc_status = -EISDIR;
6f926b5b
TM		 1398 break;
1399 default:
24ac23ab 1400 data->rpc_status = -ENOTDIR;
6f926b5b 1401 }
26e976a8 1402 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1403 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1404 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1405 }
3e309914 1406 data->rpc_done = 1;
24ac23ab 1407}
6f926b5b 1408
24ac23ab
TM		 1409static void nfs4_open_release(void *calldata)
1410{
1411 struct nfs4_opendata *data = calldata;
1412 struct nfs4_state *state = NULL;
1413
1414 /* If this request hasn't been cancelled, do nothing */
1415 if (data->cancelled == 0)
1416 goto out_free;
1417 /* In case of error, no cleanup! */
3e309914 1418 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1419 goto out_free;
1420 /* In case we need an open_confirm, no cleanup! */
1421 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1422 goto out_free;
24ac23ab 1423 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1424 if (!IS_ERR(state))
dc0b027d 1425 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1426out_free:
c6d00e63 1427 nfs4_opendata_put(data);
24ac23ab
TM		 1428}
1429
1430static const struct rpc_call_ops nfs4_open_ops = {
1431 .rpc_call_prepare = nfs4_open_prepare,
1432 .rpc_call_done = nfs4_open_done,
1433 .rpc_release = nfs4_open_release,
1434};
1435
b257957e
AB		 1436static const struct rpc_call_ops nfs4_recover_open_ops = {
1437 .rpc_call_prepare = nfs4_recover_open_prepare,
1438 .rpc_call_done = nfs4_open_done,
1439 .rpc_release = nfs4_open_release,
1440};
1441
1442static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1443{
1444 struct inode *dir = data->dir->d_inode;
1445 struct nfs_server *server = NFS_SERVER(dir);
1446 struct nfs_openargs *o_arg = &data->o_arg;
1447 struct nfs_openres *o_res = &data->o_res;
1448 struct rpc_task *task;
5138fde0
TM		 1449 struct rpc_message msg = {
1450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1451 .rpc_argp = o_arg,
1452 .rpc_resp = o_res,
1453 .rpc_cred = data->owner->so_cred,
1454 };
c970aa85
TM		 1455 struct rpc_task_setup task_setup_data = {
1456 .rpc_client = server->client,
5138fde0 1457 .rpc_message = &msg,
c970aa85
TM		 1458 .callback_ops = &nfs4_open_ops,
1459 .callback_data = data,
101070ca 1460 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1461 .flags = RPC_TASK_ASYNC,
1462 };
24ac23ab
TM		 1463 int status;
1464
c6d00e63 1465 kref_get(&data->kref);
3e309914
TM		 1466 data->rpc_done = 0;
1467 data->rpc_status = 0;
2ced46c2 1468 data->cancelled = 0;
b257957e
AB		 1469 if (isrecover)
1470 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1471 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1472 if (IS_ERR(task))
1473 return PTR_ERR(task);
1474 status = nfs4_wait_for_completion_rpc_task(task);
1475 if (status != 0) {
1476 data->cancelled = 1;
1477 smp_wmb();
1478 } else
1479 status = data->rpc_status;
1480 rpc_put_task(task);
1481
1482 return status;
1483}
1484
1485static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1486{
1487 struct inode *dir = data->dir->d_inode;
1488 struct nfs_openres *o_res = &data->o_res;
1489 int status;
1490
1491 status = nfs4_run_open_task(data, 1);
1492 if (status != 0 || !data->rpc_done)
1493 return status;
1494
1495 nfs_refresh_inode(dir, o_res->dir_attr);
1496
1497 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1498 status = _nfs4_proc_open_confirm(data);
1499 if (status != 0)
1500 return status;
1501 }
1502
1503 return status;
1504}
1505
1506/*
1507 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1508 */
1509static int _nfs4_proc_open(struct nfs4_opendata *data)
1510{
1511 struct inode *dir = data->dir->d_inode;
1512 struct nfs_server *server = NFS_SERVER(dir);
1513 struct nfs_openargs *o_arg = &data->o_arg;
1514 struct nfs_openres *o_res = &data->o_res;
1515 int status;
1516
1517 status = nfs4_run_open_task(data, 0);
3e309914 1518 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1519 return status;
1520
56ae19f3
TM		 1521 if (o_arg->open_flags & O_CREAT) {
1522 update_changeattr(dir, &o_res->cinfo);
1523 nfs_post_op_update_inode(dir, o_res->dir_attr);
1524 } else
1525 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1526 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1527 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1528 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1529 status = _nfs4_proc_open_confirm(data);
1da177e4 1530 if (status != 0)
24ac23ab 1531 return status;
1da177e4
LT		 1532 }
1533 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1534 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1535 return 0;
1da177e4
LT		 1536}
1537
10afec90 1538static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1539{
7539bbab 1540 struct nfs_client *clp = server->nfs_client;
a78cb57a 1541 unsigned int loop;
6b30954e 1542 int ret;
58d9714a 1543
a78cb57a 1544 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1545 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1546 if (ret != 0)
a78cb57a 1547 break;
e598d843
TM		 1548 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1549 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1550 break;
58d9714a 1551 nfs4_schedule_state_recovery(clp);
a78cb57a 1552 ret = -EIO;
6b30954e 1553 }
a78cb57a 1554 return ret;
58d9714a
TM		 1555}
1556
1da177e4
LT		 1557/*
1558 * OPEN_EXPIRED:
1559 * reclaim state on the server after a network partition.
1560 * Assumes caller holds the appropriate lock
1561 */
539cd03a 1562static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1563{
e56e0b78 1564 struct nfs4_opendata *opendata;
864472e9 1565 int ret;
1da177e4 1566
6f220ed5
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1568 if (IS_ERR(opendata))
1569 return PTR_ERR(opendata);
864472e9 1570 ret = nfs4_open_recover(opendata, state);
35d05778 1571 if (ret == -ESTALE)
539cd03a 1572 d_drop(ctx->path.dentry);
c6d00e63 1573 nfs4_opendata_put(opendata);
864472e9 1574 return ret;
1da177e4
LT		 1575}
1576
a9ed2e25 1577static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1578{
539cd03a 1579 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1580 struct nfs4_exception exception = { };
1581 int err;
1582
1583 do {
539cd03a 1584 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1585 switch (err) {
1586 default:
1587 goto out;
1588 case -NFS4ERR_GRACE:
1589 case -NFS4ERR_DELAY:
2c643488 1590 case -EKEYEXPIRED:
a9ed2e25
TM		 1591 nfs4_handle_exception(server, err, &exception);
1592 err = 0;
1593 }
202b50dc 1594 } while (exception.retry);
a9ed2e25 1595out:
202b50dc
TM		 1596 return err;
1597}
1598
1da177e4
LT		 1599static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1da177e4 1601 struct nfs_open_context *ctx;
864472e9 1602 int ret;
1da177e4 1603
864472e9
TM		 1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
1606 return PTR_ERR(ctx);
539cd03a 1607 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1da177e4
LT		 1610}
1611
aa53ed54
JL		 1612/*
1613 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1614 * fields corresponding to attributes that were used to store the verifier.
1615 * Make sure we clobber those fields in the later setattr call
1616 */
1617static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1618{
1619 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1620 !(sattr->ia_valid & ATTR_ATIME_SET))
1621 sattr->ia_valid |= ATTR_ATIME;
1622
1623 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1624 !(sattr->ia_valid & ATTR_MTIME_SET))
1625 sattr->ia_valid |= ATTR_MTIME;
1626}
1627
1da177e4 1628/*
24ac23ab 1629 * Returns a referenced nfs4_state
1da177e4 1630 */
dc0b027d 1631static 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		 1632{
1633 struct nfs4_state_owner *sp;
1634 struct nfs4_state *state = NULL;
1635 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1636 struct nfs4_opendata *opendata;
aac00a8d 1637 int status;
1da177e4
LT		 1638
1639 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1640 status = -ENOMEM;
1641 if (!(sp = nfs4_get_state_owner(server, cred))) {
1642 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1643 goto out_err;
1644 }
58d9714a
TM		 1645 status = nfs4_recover_expired_lease(server);
1646 if (status != 0)
b4454fe1 1647 goto err_put_state_owner;
aac00a8d 1648 if (path->dentry->d_inode != NULL)
dc0b027d 1649 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1650 status = -ENOMEM;
8535b2be 1651 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1652 if (opendata == NULL)
95d35cb4 1653 goto err_put_state_owner;
1da177e4 1654
aac00a8d
TM		 1655 if (path->dentry->d_inode != NULL)
1656 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1657
24ac23ab 1658 status = _nfs4_proc_open(opendata);
1da177e4 1659 if (status != 0)
c6d00e63 1660 goto err_opendata_put;
1da177e4 1661
24ac23ab 1662 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1663 status = PTR_ERR(state);
1664 if (IS_ERR(state))
c6d00e63 1665 goto err_opendata_put;
0df5dd4a 1666 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1667 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1668
1669 if (opendata->o_arg.open_flags & O_EXCL) {
1670 nfs4_exclusive_attrset(opendata, sattr);
1671
1672 nfs_fattr_init(opendata->o_res.f_attr);
1673 status = nfs4_do_setattr(state->inode, cred,
1674 opendata->o_res.f_attr, sattr,
1675 state);
1676 if (status == 0)
1677 nfs_setattr_update_inode(state->inode, sattr);
1678 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1679 }
c6d00e63 1680 nfs4_opendata_put(opendata);
1da177e4 1681 nfs4_put_state_owner(sp);
1da177e4
LT		 1682 *res = state;
1683 return 0;
c6d00e63
TM		 1684err_opendata_put:
1685 nfs4_opendata_put(opendata);
e56e0b78
TM		 1686err_put_state_owner:
1687 nfs4_put_state_owner(sp);
1da177e4 1688out_err:
1da177e4
LT		 1689 *res = NULL;
1690 return status;
1691}
1692
1693
dc0b027d 1694static 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		 1695{
1696 struct nfs4_exception exception = { };
1697 struct nfs4_state *res;
1698 int status;
1699
1700 do {
dc0b027d 1701 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1702 if (status == 0)
1703 break;
1704 /* NOTE: BAD_SEQID means the server and client disagree about the
1705 * book-keeping w.r.t. state-changing operations
1706 * (OPEN/CLOSE/LOCK/LOCKU...)
1707 * It is actually a sign of a bug on the client or on the server.
1708 *
1709 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1710 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1711 * have unhashed the old state_owner for us, and that we can
1712 * therefore safely retry using a new one. We should still warn
1713 * the user though...
1714 */
1715 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1716 printk(KERN_WARNING "NFS: v4 server %s "
1717 " returned a bad sequence-id error!\n",
1718 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1719 exception.retry = 1;
1720 continue;
1721 }
550f5747
TM		 1722 /*
1723 * BAD_STATEID on OPEN means that the server cancelled our
1724 * state before it received the OPEN_CONFIRM.
1725 * Recover by retrying the request as per the discussion
1726 * on Page 181 of RFC3530.
1727 */
1728 if (status == -NFS4ERR_BAD_STATEID) {
1729 exception.retry = 1;
1730 continue;
1731 }
aac00a8d
TM		 1732 if (status == -EAGAIN) {
1733 /* We must have found a delegation */
1734 exception.retry = 1;
1735 continue;
1736 }
1da177e4
LT		 1737 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1738 status, &exception));
1739 } while (exception.retry);
1740 return res;
1741}
1742
659bfcd6
TM		 1743static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1744 struct nfs_fattr *fattr, struct iattr *sattr,
1745 struct nfs4_state *state)
1da177e4 1746{
3e4f6290 1747 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1748 struct nfs_setattrargs arg = {
3e4f6290 1749 .fh = NFS_FH(inode),
1da177e4
LT		 1750 .iap = sattr,
1751 .server = server,
1752 .bitmask = server->attr_bitmask,
1753 };
1754 struct nfs_setattrres res = {
1755 .fattr = fattr,
1756 .server = server,
1757 };
1758 struct rpc_message msg = {
659bfcd6
TM		 1759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1760 .rpc_argp = &arg,
1761 .rpc_resp = &res,
1762 .rpc_cred = cred,
1da177e4 1763 };
26e976a8 1764 unsigned long timestamp = jiffies;
65e4308d 1765 int status;
1da177e4 1766
0e574af1 1767 nfs_fattr_init(fattr);
1da177e4 1768
3e4f6290
TM		 1769 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1770 /* Use that stateid */
1771 } else if (state != NULL) {
08e9eac4
TM		 1772 nfs4_copy_stateid(&arg.stateid, state, current->files);
1773 } else
1da177e4
LT		 1774 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1775
cccef3b9 1776 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1777 if (status == 0 && state != NULL)
1778 renew_lease(server, timestamp);
65e4308d 1779 return status;
1da177e4
LT		 1780}
1781
659bfcd6
TM		 1782static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1783 struct nfs_fattr *fattr, struct iattr *sattr,
1784 struct nfs4_state *state)
1da177e4 1785{
3e4f6290 1786 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1787 struct nfs4_exception exception = { };
1788 int err;
1789 do {
1790 err = nfs4_handle_exception(server,
659bfcd6 1791 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1792 &exception);
1793 } while (exception.retry);
1794 return err;
1795}
1796
1797struct nfs4_closedata {
4a35bd41 1798 struct path path;
1da177e4
LT		 1799 struct inode *inode;
1800 struct nfs4_state *state;
1801 struct nfs_closeargs arg;
1802 struct nfs_closeres res;
516a6af6 1803 struct nfs_fattr fattr;
26e976a8 1804 unsigned long timestamp;
1da177e4
LT		 1805};
1806
963d8fe5 1807static void nfs4_free_closedata(void *data)
9512135d 1808{
963d8fe5
TM		 1809 struct nfs4_closedata *calldata = data;
1810 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1811
1812 nfs4_put_open_state(calldata->state);
1813 nfs_free_seqid(calldata->arg.seqid);
9512135d 1814 nfs4_put_state_owner(sp);
31f31db1 1815 path_put(&calldata->path);
9512135d
TM		 1816 kfree(calldata);
1817}
1818
88069f77
TM		 1819static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1820 fmode_t fmode)
1821{
1822 spin_lock(&state->owner->so_lock);
1823 if (!(fmode & FMODE_READ))
1824 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1825 if (!(fmode & FMODE_WRITE))
1826 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1827 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1828 spin_unlock(&state->owner->so_lock);
1829}
1830
963d8fe5 1831static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1832{
963d8fe5 1833 struct nfs4_closedata *calldata = data;
1da177e4 1834 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1835 struct nfs_server *server = NFS_SERVER(calldata->inode);
1836
19ddab06 1837 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1838 if (RPC_ASSASSINATED(task))
1839 return;
1da177e4
LT		 1840 /* hmm. we are done with the inode, and in the process of freeing
1841 * the state_owner. we keep this around to process errors
1842 */
1da177e4
LT		 1843 switch (task->tk_status) {
1844 case 0:
45328c35 1845 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1846 renew_lease(server, calldata->timestamp);
88069f77
TM		 1847 nfs4_close_clear_stateid_flags(state,
1848 calldata->arg.fmode);
1da177e4
LT		 1849 break;
1850 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1851 case -NFS4ERR_OLD_STATEID:
1852 case -NFS4ERR_BAD_STATEID:
1da177e4 1853 case -NFS4ERR_EXPIRED:
dc0b027d 1854 if (calldata->arg.fmode == 0)
9e33bed5 1855 break;
1da177e4 1856 default:
72211dbe
TM		 1857 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1858 rpc_restart_call_prepare(task);
1da177e4 1859 }
72211dbe 1860 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1861 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1862}
1863
4ce70ada 1864static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1865{
4ce70ada 1866 struct nfs4_closedata *calldata = data;
9512135d 1867 struct nfs4_state *state = calldata->state;
88069f77 1868 int call_close = 0;
9512135d 1869
963d8fe5 1870 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1871 return;
003707c7 1872
88069f77
TM		 1873 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1874 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1875 spin_lock(&state->owner->so_lock);
003707c7 1876 /* Calculate the change in open mode */
e7616923 1877 if (state->n_rdwr == 0) {
003707c7 1878 if (state->n_rdonly == 0) {
88069f77
TM		 1879 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1880 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1881 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1882 }
1883 if (state->n_wronly == 0) {
88069f77
TM		 1884 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1885 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1886 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1887 }
e7616923 1888 }
4cecb76f 1889 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1890
1891 if (!call_close) {
963d8fe5
TM		 1892 /* Note: exit _without_ calling nfs4_close_done */
1893 task->tk_action = NULL;
9512135d
TM		 1894 return;
1895 }
88069f77
TM		 1896
1897 if (calldata->arg.fmode == 0)
1898 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1899
516a6af6 1900 nfs_fattr_init(calldata->res.fattr);
26e976a8 1901 calldata->timestamp = jiffies;
035168ab 1902 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1903 &calldata->arg.seq_args, &calldata->res.seq_res,
1904 1, task))
1905 return;
5138fde0 1906 rpc_call_start(task);
1da177e4
LT		 1907}
1908
963d8fe5 1909static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1910 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1911 .rpc_call_done = nfs4_close_done,
1912 .rpc_release = nfs4_free_closedata,
1913};
1914
1da177e4
LT		 1915/*
1916 * It is possible for data to be read/written from a mem-mapped file
1917 * after the sys_close call (which hits the vfs layer as a flush).
1918 * This means that we can't safely call nfsv4 close on a file until
1919 * the inode is cleared. This in turn means that we are not good
1920 * NFSv4 citizens - we do not indicate to the server to update the file's
1921 * share state even when we are done with one of the three share
1922 * stateid's in the inode.
1923 *
1924 * NOTE: Caller must be holding the sp->so_owner semaphore!
1925 */
8535b2be 1926int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1927{
4a35bd41 1928 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1929 struct nfs4_closedata *calldata;
b39e625b
TM		 1930 struct nfs4_state_owner *sp = state->owner;
1931 struct rpc_task *task;
5138fde0
TM		 1932 struct rpc_message msg = {
1933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1934 .rpc_cred = state->owner->so_cred,
1935 };
c970aa85
TM		 1936 struct rpc_task_setup task_setup_data = {
1937 .rpc_client = server->client,
5138fde0 1938 .rpc_message = &msg,
c970aa85 1939 .callback_ops = &nfs4_close_ops,
101070ca 1940 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1941 .flags = RPC_TASK_ASYNC,
1942 };
9512135d 1943 int status = -ENOMEM;
1da177e4 1944
8535b2be 1945 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1946 if (calldata == NULL)
9512135d 1947 goto out;
4a35bd41 1948 calldata->inode = state->inode;
1da177e4 1949 calldata->state = state;
4a35bd41 1950 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1951 calldata->arg.stateid = &state->open_stateid;
1da177e4 1952 /* Serialization for the sequence id */
8535b2be 1953 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1954 if (calldata->arg.seqid == NULL)
1955 goto out_free_calldata;
dc0b027d 1956 calldata->arg.fmode = 0;
a65318bf 1957 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1958 calldata->res.fattr = &calldata->fattr;
c1d51931 1959 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1960 calldata->res.server = server;
5f7dbd5c 1961 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
f6948697
AV		 1962 path_get(path);
1963 calldata->path = *path;
9512135d 1964
5138fde0
TM		 1965 msg.rpc_argp = &calldata->arg,
1966 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1967 task_setup_data.callback_data = calldata;
1968 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1969 if (IS_ERR(task))
1970 return PTR_ERR(task);
a49c3c77
TM		 1971 status = 0;
1972 if (wait)
1973 status = rpc_wait_for_completion_task(task);
b39e625b 1974 rpc_put_task(task);
a49c3c77 1975 return status;
9512135d
TM		 1976out_free_calldata:
1977 kfree(calldata);
1978out:
b39e625b
TM		 1979 nfs4_put_open_state(state);
1980 nfs4_put_state_owner(sp);
9512135d 1981 return status;
1da177e4
LT		 1982}
1983
dc0b027d 1984static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1985{
1986 struct file *filp;
1b45c46c 1987 int ret;
02a913a7 1988
1b45c46c 1989 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1990 if (fmode & FMODE_EXEC) {
af22f94a 1991 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1992 state->owner->so_cred,
1993 nd->intent.open.flags);
1994 if (ret < 0)
1995 goto out_close;
1996 }
4a35bd41 1997 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1998 if (!IS_ERR(filp)) {
1999 struct nfs_open_context *ctx;
cd3758e3 2000 ctx = nfs_file_open_context(filp);
02a913a7 2001 ctx->state = state;
95cf959b
TM		 2002 return 0;
2003 }
1b45c46c
TM		 2004 ret = PTR_ERR(filp);
2005out_close:
dc0b027d 2006 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 2007 return ret;
02a913a7
TM		 2008}
2009
2010struct dentry *
1da177e4
LT		 2011nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2012{
ad389da7 2013 struct path path = {
4ac91378 2014 .mnt = nd->path.mnt,
ad389da7
TM		 2015 .dentry = dentry,
2016 };
4ac91378 2017 struct dentry *parent;
1da177e4
LT		 2018 struct iattr attr;
2019 struct rpc_cred *cred;
2020 struct nfs4_state *state;
02a913a7 2021 struct dentry *res;
dc0b027d 2022 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 2023
2024 if (nd->flags & LOOKUP_CREATE) {
2025 attr.ia_mode = nd->intent.open.create_mode;
2026 attr.ia_valid = ATTR_MODE;
2027 if (!IS_POSIXACL(dir))
ce3b0f8d 2028 attr.ia_mode &= ~current_umask();
1da177e4
LT		 2029 } else {
2030 attr.ia_valid = 0;
2031 BUG_ON(nd->intent.open.flags & O_CREAT);
2032 }
2033
98a8e323 2034 cred = rpc_lookup_cred();
1da177e4 2035 if (IS_ERR(cred))
02a913a7 2036 return (struct dentry *)cred;
565277f6
TM		 2037 parent = dentry->d_parent;
2038 /* Protect against concurrent sillydeletes */
2039 nfs_block_sillyrename(parent);
dc0b027d 2040 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 2041 put_rpccred(cred);
02a913a7 2042 if (IS_ERR(state)) {
d75340cc 2043 if (PTR_ERR(state) == -ENOENT) {
02a913a7 2044 d_add(dentry, NULL);
d75340cc
TM		 2045 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2046 }
565277f6 2047 nfs_unblock_sillyrename(parent);
02a913a7
TM		 2048 return (struct dentry *)state;
2049 }
24ac23ab 2050 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 2051 if (res != NULL)
deee9369 2052 path.dentry = res;
d75340cc 2053 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 2054 nfs_unblock_sillyrename(parent);
dc0b027d 2055 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2056 return res;
1da177e4
LT		 2057}
2058
2059int
02a913a7 2060nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 2061{
ad389da7 2062 struct path path = {
4ac91378 2063 .mnt = nd->path.mnt,
ad389da7
TM		 2064 .dentry = dentry,
2065 };
1da177e4
LT		 2066 struct rpc_cred *cred;
2067 struct nfs4_state *state;
dc0b027d 2068 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 2069
98a8e323 2070 cred = rpc_lookup_cred();
1da177e4
LT		 2071 if (IS_ERR(cred))
2072 return PTR_ERR(cred);
dc0b027d 2073 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 2074 put_rpccred(cred);
02a913a7
TM		 2075 if (IS_ERR(state)) {
2076 switch (PTR_ERR(state)) {
2077 case -EPERM:
2078 case -EACCES:
2079 case -EDQUOT:
2080 case -ENOSPC:
2081 case -EROFS:
04287f97 2082 return PTR_ERR(state);
b87c0adf
CL		 2083 default:
2084 goto out_drop;
02a913a7 2085 }
02a913a7 2086 }
24ac23ab 2087 if (state->inode == dentry->d_inode) {
d75340cc 2088 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 2089 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 2090 return 1;
2091 }
dc0b027d 2092 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 2093out_drop:
2094 d_drop(dentry);
1da177e4
LT		 2095 return 0;
2096}
2097
1185a552 2098static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2099{
2100 if (ctx->state == NULL)
2101 return;
2102 if (is_sync)
2103 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2104 else
2105 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2106}
1da177e4
LT		 2107
2108static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2109{
43652ad5
BH		 2110 struct nfs4_server_caps_arg args = {
2111 .fhandle = fhandle,
2112 };
1da177e4
LT		 2113 struct nfs4_server_caps_res res = {};
2114 struct rpc_message msg = {
2115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2116 .rpc_argp = &args,
1da177e4
LT		 2117 .rpc_resp = &res,
2118 };
2119 int status;
2120
cccef3b9 2121 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2122 if (status == 0) {
2123 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2124 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2125 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2126 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2127 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2128 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2129 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2130 server->caps |= NFS_CAP_ACLS;
2131 if (res.has_links != 0)
2132 server->caps |= NFS_CAP_HARDLINKS;
2133 if (res.has_symlinks != 0)
2134 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2135 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2136 server->caps |= NFS_CAP_FILEID;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2138 server->caps |= NFS_CAP_MODE;
2139 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2140 server->caps |= NFS_CAP_NLINK;
2141 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2142 server->caps |= NFS_CAP_OWNER;
2143 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2144 server->caps |= NFS_CAP_OWNER_GROUP;
2145 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2146 server->caps |= NFS_CAP_ATIME;
2147 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2148 server->caps |= NFS_CAP_CTIME;
2149 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2150 server->caps |= NFS_CAP_MTIME;
2151
a65318bf
TM		 2152 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2153 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2154 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2155 server->acl_bitmask = res.acl_bitmask;
2156 }
cccef3b9 2157
1da177e4
LT		 2158 return status;
2159}
2160
55a97593 2161int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2162{
2163 struct nfs4_exception exception = { };
2164 int err;
2165 do {
2166 err = nfs4_handle_exception(server,
2167 _nfs4_server_capabilities(server, fhandle),
2168 &exception);
2169 } while (exception.retry);
2170 return err;
2171}
2172
2173static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2174 struct nfs_fsinfo *info)
2175{
1da177e4
LT		 2176 struct nfs4_lookup_root_arg args = {
2177 .bitmask = nfs4_fattr_bitmap,
2178 };
2179 struct nfs4_lookup_res res = {
2180 .server = server,
0e574af1 2181 .fattr = info->fattr,
1da177e4
LT		 2182 .fh = fhandle,
2183 };
2184 struct rpc_message msg = {
2185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2186 .rpc_argp = &args,
2187 .rpc_resp = &res,
2188 };
008f55d0 2189
0e574af1 2190 nfs_fattr_init(info->fattr);
fccba804 2191 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2192}
2193
2194static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2195 struct nfs_fsinfo *info)
2196{
2197 struct nfs4_exception exception = { };
2198 int err;
2199 do {
2200 err = nfs4_handle_exception(server,
2201 _nfs4_lookup_root(server, fhandle, info),
2202 &exception);
2203 } while (exception.retry);
2204 return err;
2205}
2206
54ceac45
DH		 2207/*
2208 * get the file handle for the "/" directory on the server
2209 */
1da177e4 2210static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2211 struct nfs_fsinfo *info)
1da177e4 2212{
1da177e4
LT		 2213 int status;
2214
1da177e4 2215 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2216 if (status == 0)
2217 status = nfs4_server_capabilities(server, fhandle);
2218 if (status == 0)
2219 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2220 return nfs4_map_errors(status);
1da177e4
LT		 2221}
2222
6b97fd3d
MN		 2223/*
2224 * Get locations and (maybe) other attributes of a referral.
2225 * Note that we'll actually follow the referral later when
2226 * we detect fsid mismatch in inode revalidation
2227 */
56659e99 2228static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2229{
2230 int status = -ENOMEM;
2231 struct page *page = NULL;
2232 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2233
2234 page = alloc_page(GFP_KERNEL);
2235 if (page == NULL)
2236 goto out;
2237 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2238 if (locations == NULL)
2239 goto out;
2240
c228fd3a 2241 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2242 if (status != 0)
2243 goto out;
2244 /* Make sure server returned a different fsid for the referral */
2245 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2246 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2247 status = -EIO;
2248 goto out;
2249 }
2250
2251 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2252 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2253 if (!fattr->mode)
2254 fattr->mode = S_IFDIR;
2255 memset(fhandle, 0, sizeof(struct nfs_fh));
2256out:
2257 if (page)
2258 __free_page(page);
2259 if (locations)
2260 kfree(locations);
2261 return status;
2262}
2263
1da177e4
LT		 2264static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2265{
2266 struct nfs4_getattr_arg args = {
2267 .fh = fhandle,
2268 .bitmask = server->attr_bitmask,
2269 };
2270 struct nfs4_getattr_res res = {
2271 .fattr = fattr,
2272 .server = server,
2273 };
2274 struct rpc_message msg = {
2275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2276 .rpc_argp = &args,
2277 .rpc_resp = &res,
2278 };
2279
0e574af1 2280 nfs_fattr_init(fattr);
cccef3b9 2281 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2282}
2283
2284static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
2289 err = nfs4_handle_exception(server,
2290 _nfs4_proc_getattr(server, fhandle, fattr),
2291 &exception);
2292 } while (exception.retry);
2293 return err;
2294}
2295
2296/*
2297 * The file is not closed if it is opened due to the a request to change
2298 * the size of the file. The open call will not be needed once the
2299 * VFS layer lookup-intents are implemented.
2300 *
2301 * Close is called when the inode is destroyed.
2302 * If we haven't opened the file for O_WRONLY, we
2303 * need to in the size_change case to obtain a stateid.
2304 *
2305 * Got race?
2306 * Because OPEN is always done by name in nfsv4, it is
2307 * possible that we opened a different file by the same
2308 * name. We can recognize this race condition, but we
2309 * can't do anything about it besides returning an error.
2310 *
2311 * This will be fixed with VFS changes (lookup-intent).
2312 */
2313static int
2314nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2315 struct iattr *sattr)
2316{
08e9eac4 2317 struct inode *inode = dentry->d_inode;
659bfcd6 2318 struct rpc_cred *cred = NULL;
d530838b 2319 struct nfs4_state *state = NULL;
1da177e4
LT		 2320 int status;
2321
0e574af1 2322 nfs_fattr_init(fattr);
1da177e4 2323
d530838b 2324 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2325 if (sattr->ia_valid & ATTR_FILE) {
2326 struct nfs_open_context *ctx;
2327
2328 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2329 if (ctx) {
2330 cred = ctx->cred;
2331 state = ctx->state;
2332 }
659bfcd6 2333 }
08e9eac4 2334
659bfcd6 2335 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2336 if (status == 0)
2337 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2338 return status;
2339}
2340
56659e99
TM		 2341static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2342 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2343 struct nfs_fattr *fattr)
2344{
2345 int status;
2346 struct nfs4_lookup_arg args = {
2347 .bitmask = server->attr_bitmask,
2348 .dir_fh = dirfh,
2349 .name = name,
2350 };
2351 struct nfs4_lookup_res res = {
2352 .server = server,
2353 .fattr = fattr,
2354 .fh = fhandle,
2355 };
2356 struct rpc_message msg = {
2357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2358 .rpc_argp = &args,
2359 .rpc_resp = &res,
2360 };
2361
2362 nfs_fattr_init(fattr);
2363
2364 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2365 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2366 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2367 return status;
2368}
2369
2370static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2371 struct qstr *name, struct nfs_fh *fhandle,
2372 struct nfs_fattr *fattr)
2373{
2374 struct nfs4_exception exception = { };
2375 int err;
2376 do {
4e56e082
TM		 2377 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2378 /* FIXME: !!!! */
2379 if (err == -NFS4ERR_MOVED) {
2380 err = -EREMOTE;
2381 break;
2382 }
2383 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2384 } while (exception.retry);
2385 return err;
2386}
2387
56659e99 2388static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2389 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2390{
4e56e082 2391 int status;
1da177e4
LT		 2392
2393 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2394 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2395 if (status == -NFS4ERR_MOVED)
2396 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2397 dprintk("NFS reply lookup: %d\n", status);
2398 return status;
2399}
2400
2401static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2402{
2403 struct nfs4_exception exception = { };
2404 int err;
2405 do {
2406 err = nfs4_handle_exception(NFS_SERVER(dir),
2407 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2408 &exception);
2409 } while (exception.retry);
2410 return err;
2411}
2412
2413static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2414{
76b32999 2415 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2416 struct nfs4_accessargs args = {
2417 .fh = NFS_FH(inode),
76b32999
TM		 2418 .bitmask = server->attr_bitmask,
2419 };
2420 struct nfs4_accessres res = {
2421 .server = server,
1da177e4 2422 };
1da177e4
LT		 2423 struct rpc_message msg = {
2424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2425 .rpc_argp = &args,
2426 .rpc_resp = &res,
2427 .rpc_cred = entry->cred,
2428 };
2429 int mode = entry->mask;
2430 int status;
2431
2432 /*
2433 * Determine which access bits we want to ask for...
2434 */
2435 if (mode & MAY_READ)
2436 args.access |= NFS4_ACCESS_READ;
2437 if (S_ISDIR(inode->i_mode)) {
2438 if (mode & MAY_WRITE)
2439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2440 if (mode & MAY_EXEC)
2441 args.access |= NFS4_ACCESS_LOOKUP;
2442 } else {
2443 if (mode & MAY_WRITE)
2444 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2445 if (mode & MAY_EXEC)
2446 args.access |= NFS4_ACCESS_EXECUTE;
2447 }
c407d41a
TM		 2448
2449 res.fattr = nfs_alloc_fattr();
2450 if (res.fattr == NULL)
2451 return -ENOMEM;
2452
cccef3b9 2453 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2454 if (!status) {
2455 entry->mask = 0;
2456 if (res.access & NFS4_ACCESS_READ)
2457 entry->mask |= MAY_READ;
2458 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2459 entry->mask |= MAY_WRITE;
2460 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2461 entry->mask |= MAY_EXEC;
c407d41a 2462 nfs_refresh_inode(inode, res.fattr);
1da177e4 2463 }
c407d41a 2464 nfs_free_fattr(res.fattr);
1da177e4
LT		 2465 return status;
2466}
2467
2468static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2469{
2470 struct nfs4_exception exception = { };
2471 int err;
2472 do {
2473 err = nfs4_handle_exception(NFS_SERVER(inode),
2474 _nfs4_proc_access(inode, entry),
2475 &exception);
2476 } while (exception.retry);
2477 return err;
2478}
2479
2480/*
2481 * TODO: For the time being, we don't try to get any attributes
2482 * along with any of the zero-copy operations READ, READDIR,
2483 * READLINK, WRITE.
2484 *
2485 * In the case of the first three, we want to put the GETATTR
2486 * after the read-type operation -- this is because it is hard
2487 * to predict the length of a GETATTR response in v4, and thus
2488 * align the READ data correctly. This means that the GETATTR
2489 * may end up partially falling into the page cache, and we should
2490 * shift it into the 'tail' of the xdr_buf before processing.
2491 * To do this efficiently, we need to know the total length
2492 * of data received, which doesn't seem to be available outside
2493 * of the RPC layer.
2494 *
2495 * In the case of WRITE, we also want to put the GETATTR after
2496 * the operation -- in this case because we want to make sure
2497 * we get the post-operation mtime and size. This means that
2498 * we can't use xdr_encode_pages() as written: we need a variant
2499 * of it which would leave room in the 'tail' iovec.
2500 *
2501 * Both of these changes to the XDR layer would in fact be quite
2502 * minor, but I decided to leave them for a subsequent patch.
2503 */
2504static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2505 unsigned int pgbase, unsigned int pglen)
2506{
2507 struct nfs4_readlink args = {
2508 .fh = NFS_FH(inode),
2509 .pgbase = pgbase,
2510 .pglen = pglen,
2511 .pages = &page,
2512 };
f50c7000 2513 struct nfs4_readlink_res res;
1da177e4
LT		 2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2516 .rpc_argp = &args,
f50c7000 2517 .rpc_resp = &res,
1da177e4
LT		 2518 };
2519
cccef3b9 2520 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2521}
2522
2523static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2524 unsigned int pgbase, unsigned int pglen)
2525{
2526 struct nfs4_exception exception = { };
2527 int err;
2528 do {
2529 err = nfs4_handle_exception(NFS_SERVER(inode),
2530 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2531 &exception);
2532 } while (exception.retry);
2533 return err;
2534}
2535
1da177e4
LT		 2536/*
2537 * Got race?
2538 * We will need to arrange for the VFS layer to provide an atomic open.
2539 * Until then, this create/open method is prone to inefficiency and race
2540 * conditions due to the lookup, create, and open VFS calls from sys_open()
2541 * placed on the wire.
2542 *
2543 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2544 * The file will be opened again in the subsequent VFS open call
2545 * (nfs4_proc_file_open).
2546 *
2547 * The open for read will just hang around to be used by any process that
2548 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2549 */
2550
2551static int
2552nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2553 int flags, struct nameidata *nd)
1da177e4 2554{
ad389da7 2555 struct path path = {
4ac91378 2556 .mnt = nd->path.mnt,
ad389da7
TM		 2557 .dentry = dentry,
2558 };
1da177e4
LT		 2559 struct nfs4_state *state;
2560 struct rpc_cred *cred;
dc0b027d 2561 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2562 int status = 0;
2563
98a8e323 2564 cred = rpc_lookup_cred();
1da177e4
LT		 2565 if (IS_ERR(cred)) {
2566 status = PTR_ERR(cred);
2567 goto out;
2568 }
dc0b027d 2569 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2570 d_drop(dentry);
1da177e4
LT		 2571 if (IS_ERR(state)) {
2572 status = PTR_ERR(state);
659bfcd6 2573 goto out_putcred;
1da177e4 2574 }
d4d9cdcb 2575 d_add(dentry, igrab(state->inode));
d75340cc 2576 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
ad389da7 2577 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2578 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2579 else
dc0b027d 2580 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2581out_putcred:
2582 put_rpccred(cred);
1da177e4
LT		 2583out:
2584 return status;
2585}
2586
2587static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2588{
16e42959 2589 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2590 struct nfs_removeargs args = {
1da177e4 2591 .fh = NFS_FH(dir),
4fdc17b2
TM		 2592 .name.len = name->len,
2593 .name.name = name->name,
16e42959
TM		 2594 .bitmask = server->attr_bitmask,
2595 };
4fdc17b2 2596 struct nfs_removeres res = {
16e42959 2597 .server = server,
1da177e4 2598 };
1da177e4 2599 struct rpc_message msg = {
4fdc17b2
TM		 2600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2601 .rpc_argp = &args,
2602 .rpc_resp = &res,
1da177e4 2603 };
d346890b
TM		 2604 int status = -ENOMEM;
2605
2606 res.dir_attr = nfs_alloc_fattr();
2607 if (res.dir_attr == NULL)
2608 goto out;
1da177e4 2609
cccef3b9 2610 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2611 if (status == 0) {
2612 update_changeattr(dir, &res.cinfo);
d346890b 2613 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2614 }
d346890b
TM		 2615 nfs_free_fattr(res.dir_attr);
2616out:
1da177e4
LT		 2617 return status;
2618}
2619
2620static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2621{
2622 struct nfs4_exception exception = { };
2623 int err;
2624 do {
2625 err = nfs4_handle_exception(NFS_SERVER(dir),
2626 _nfs4_proc_remove(dir, name),
2627 &exception);
2628 } while (exception.retry);
2629 return err;
2630}
2631
e4eff1a6 2632static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2633{
e4eff1a6
TM		 2634 struct nfs_server *server = NFS_SERVER(dir);
2635 struct nfs_removeargs *args = msg->rpc_argp;
2636 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2637
a65318bf 2638 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2639 res->server = server;
1da177e4 2640 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2641}
2642
e4eff1a6 2643static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2644{
e4eff1a6
TM		 2645 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2646
472cfbd9 2647 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2648 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2649 return 0;
2650 update_changeattr(dir, &res->cinfo);
d346890b 2651 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2652 return 1;
1da177e4
LT		 2653}
2654
2655static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2656 struct inode *new_dir, struct qstr *new_name)
2657{
6caf2c82 2658 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2659 struct nfs4_rename_arg arg = {
2660 .old_dir = NFS_FH(old_dir),
2661 .new_dir = NFS_FH(new_dir),
2662 .old_name = old_name,
2663 .new_name = new_name,
6caf2c82
TM		 2664 .bitmask = server->attr_bitmask,
2665 };
6caf2c82
TM		 2666 struct nfs4_rename_res res = {
2667 .server = server,
1da177e4 2668 };
1da177e4
LT		 2669 struct rpc_message msg = {
2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2671 .rpc_argp = &arg,
2672 .rpc_resp = &res,
2673 };
011fff72 2674 int status = -ENOMEM;
1da177e4 2675
011fff72
TM		 2676 res.old_fattr = nfs_alloc_fattr();
2677 res.new_fattr = nfs_alloc_fattr();
2678 if (res.old_fattr == NULL || res.new_fattr == NULL)
2679 goto out;
1da177e4 2680
011fff72 2681 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2682 if (!status) {
2683 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2684 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2685 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2686 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2687 }
011fff72
TM		 2688out:
2689 nfs_free_fattr(res.new_fattr);
2690 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2691 return status;
2692}
2693
2694static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2695 struct inode *new_dir, struct qstr *new_name)
2696{
2697 struct nfs4_exception exception = { };
2698 int err;
2699 do {
2700 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2701 _nfs4_proc_rename(old_dir, old_name,
2702 new_dir, new_name),
2703 &exception);
2704 } while (exception.retry);
2705 return err;
2706}
2707
2708static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2709{
91ba2eee 2710 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2711 struct nfs4_link_arg arg = {
2712 .fh = NFS_FH(inode),
2713 .dir_fh = NFS_FH(dir),
2714 .name = name,
91ba2eee
TM		 2715 .bitmask = server->attr_bitmask,
2716 };
91ba2eee
TM		 2717 struct nfs4_link_res res = {
2718 .server = server,
1da177e4 2719 };
1da177e4
LT		 2720 struct rpc_message msg = {
2721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2722 .rpc_argp = &arg,
91ba2eee 2723 .rpc_resp = &res,
1da177e4 2724 };
136f2627
TM		 2725 int status = -ENOMEM;
2726
2727 res.fattr = nfs_alloc_fattr();
2728 res.dir_attr = nfs_alloc_fattr();
2729 if (res.fattr == NULL || res.dir_attr == NULL)
2730 goto out;
1da177e4 2731
cccef3b9 2732 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2733 if (!status) {
2734 update_changeattr(dir, &res.cinfo);
2735 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2736 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2737 }
136f2627
TM		 2738out:
2739 nfs_free_fattr(res.dir_attr);
2740 nfs_free_fattr(res.fattr);
1da177e4
LT		 2741 return status;
2742}
2743
2744static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2745{
2746 struct nfs4_exception exception = { };
2747 int err;
2748 do {
2749 err = nfs4_handle_exception(NFS_SERVER(inode),
2750 _nfs4_proc_link(inode, dir, name),
2751 &exception);
2752 } while (exception.retry);
2753 return err;
2754}
2755
57dc9a57
TM		 2756struct nfs4_createdata {
2757 struct rpc_message msg;
2758 struct nfs4_create_arg arg;
2759 struct nfs4_create_res res;
2760 struct nfs_fh fh;
2761 struct nfs_fattr fattr;
2762 struct nfs_fattr dir_fattr;
2763};
2764
2765static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2766 struct qstr *name, struct iattr *sattr, u32 ftype)
2767{
2768 struct nfs4_createdata *data;
2769
2770 data = kzalloc(sizeof(*data), GFP_KERNEL);
2771 if (data != NULL) {
2772 struct nfs_server *server = NFS_SERVER(dir);
2773
2774 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2775 data->msg.rpc_argp = &data->arg;
2776 data->msg.rpc_resp = &data->res;
2777 data->arg.dir_fh = NFS_FH(dir);
2778 data->arg.server = server;
2779 data->arg.name = name;
2780 data->arg.attrs = sattr;
2781 data->arg.ftype = ftype;
2782 data->arg.bitmask = server->attr_bitmask;
2783 data->res.server = server;
2784 data->res.fh = &data->fh;
2785 data->res.fattr = &data->fattr;
2786 data->res.dir_fattr = &data->dir_fattr;
2787 nfs_fattr_init(data->res.fattr);
2788 nfs_fattr_init(data->res.dir_fattr);
2789 }
2790 return data;
2791}
2792
2793static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2794{
cccef3b9
AA		 2795 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2796 &data->arg, &data->res, 1);
57dc9a57
TM		 2797 if (status == 0) {
2798 update_changeattr(dir, &data->res.dir_cinfo);
2799 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2800 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2801 }
2802 return status;
2803}
2804
2805static void nfs4_free_createdata(struct nfs4_createdata *data)
2806{
2807 kfree(data);
2808}
2809
4f390c15 2810static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2811 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2812{
57dc9a57
TM		 2813 struct nfs4_createdata *data;
2814 int status = -ENAMETOOLONG;
1da177e4 2815
94a6d753 2816 if (len > NFS4_MAXPATHLEN)
57dc9a57 2817 goto out;
4f390c15 2818
57dc9a57
TM		 2819 status = -ENOMEM;
2820 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2821 if (data == NULL)
2822 goto out;
2823
2824 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2825 data->arg.u.symlink.pages = &page;
2826 data->arg.u.symlink.len = len;
1da177e4 2827
57dc9a57
TM		 2828 status = nfs4_do_create(dir, dentry, data);
2829
2830 nfs4_free_createdata(data);
2831out:
1da177e4
LT		 2832 return status;
2833}
2834
4f390c15 2835static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2836 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2837{
2838 struct nfs4_exception exception = { };
2839 int err;
2840 do {
2841 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2842 _nfs4_proc_symlink(dir, dentry, page,
2843 len, sattr),
1da177e4
LT		 2844 &exception);
2845 } while (exception.retry);
2846 return err;
2847}
2848
2849static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2850 struct iattr *sattr)
2851{
57dc9a57
TM		 2852 struct nfs4_createdata *data;
2853 int status = -ENOMEM;
1da177e4 2854
57dc9a57
TM		 2855 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2856 if (data == NULL)
2857 goto out;
2858
2859 status = nfs4_do_create(dir, dentry, data);
2860
2861 nfs4_free_createdata(data);
2862out:
1da177e4
LT		 2863 return status;
2864}
2865
2866static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2867 struct iattr *sattr)
2868{
2869 struct nfs4_exception exception = { };
2870 int err;
2871 do {
2872 err = nfs4_handle_exception(NFS_SERVER(dir),
2873 _nfs4_proc_mkdir(dir, dentry, sattr),
2874 &exception);
2875 } while (exception.retry);
2876 return err;
2877}
2878
2879static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2880 u64 cookie, struct page *page, unsigned int count, int plus)
2881{
2882 struct inode *dir = dentry->d_inode;
2883 struct nfs4_readdir_arg args = {
2884 .fh = NFS_FH(dir),
2885 .pages = &page,
2886 .pgbase = 0,
2887 .count = count,
96d25e53 2888 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2889 };
2890 struct nfs4_readdir_res res;
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2893 .rpc_argp = &args,
2894 .rpc_resp = &res,
2895 .rpc_cred = cred,
2896 };
2897 int status;
2898
3110ff80 2899 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2900 dentry->d_parent->d_name.name,
2901 dentry->d_name.name,
2902 (unsigned long long)cookie);
1da177e4
LT		 2903 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2904 res.pgbase = args.pgbase;
cccef3b9 2905 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2906 if (status == 0)
2907 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2908
2909 nfs_invalidate_atime(dir);
2910
3110ff80 2911 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2912 return status;
2913}
2914
2915static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2916 u64 cookie, struct page *page, unsigned int count, int plus)
2917{
2918 struct nfs4_exception exception = { };
2919 int err;
2920 do {
2921 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2922 _nfs4_proc_readdir(dentry, cred, cookie,
2923 page, count, plus),
2924 &exception);
2925 } while (exception.retry);
2926 return err;
2927}
2928
2929static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2930 struct iattr *sattr, dev_t rdev)
2931{
57dc9a57
TM		 2932 struct nfs4_createdata *data;
2933 int mode = sattr->ia_mode;
2934 int status = -ENOMEM;
1da177e4
LT		 2935
2936 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2937 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2938
2939 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2940 if (data == NULL)
2941 goto out;
2942
1da177e4 2943 if (S_ISFIFO(mode))
57dc9a57 2944 data->arg.ftype = NF4FIFO;
1da177e4 2945 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2946 data->arg.ftype = NF4BLK;
2947 data->arg.u.device.specdata1 = MAJOR(rdev);
2948 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2949 }
2950 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2951 data->arg.ftype = NF4CHR;
2952 data->arg.u.device.specdata1 = MAJOR(rdev);
2953 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2954 }
1da177e4 2955
57dc9a57
TM		 2956 status = nfs4_do_create(dir, dentry, data);
2957
2958 nfs4_free_createdata(data);
2959out:
1da177e4
LT		 2960 return status;
2961}
2962
2963static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2964 struct iattr *sattr, dev_t rdev)
2965{
2966 struct nfs4_exception exception = { };
2967 int err;
2968 do {
2969 err = nfs4_handle_exception(NFS_SERVER(dir),
2970 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2971 &exception);
2972 } while (exception.retry);
2973 return err;
2974}
2975
2976static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2977 struct nfs_fsstat *fsstat)
2978{
2979 struct nfs4_statfs_arg args = {
2980 .fh = fhandle,
2981 .bitmask = server->attr_bitmask,
2982 };
24ad148a
BH		 2983 struct nfs4_statfs_res res = {
2984 .fsstat = fsstat,
2985 };
1da177e4
LT		 2986 struct rpc_message msg = {
2987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2988 .rpc_argp = &args,
24ad148a 2989 .rpc_resp = &res,
1da177e4
LT		 2990 };
2991
0e574af1 2992 nfs_fattr_init(fsstat->fattr);
cccef3b9 2993 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2994}
2995
2996static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2997{
2998 struct nfs4_exception exception = { };
2999 int err;
3000 do {
3001 err = nfs4_handle_exception(server,
3002 _nfs4_proc_statfs(server, fhandle, fsstat),
3003 &exception);
3004 } while (exception.retry);
3005 return err;
3006}
3007
3008static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3009 struct nfs_fsinfo *fsinfo)
3010{
3011 struct nfs4_fsinfo_arg args = {
3012 .fh = fhandle,
3013 .bitmask = server->attr_bitmask,
3014 };
3dda5e43
BH		 3015 struct nfs4_fsinfo_res res = {
3016 .fsinfo = fsinfo,
3017 };
1da177e4
LT		 3018 struct rpc_message msg = {
3019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3020 .rpc_argp = &args,
3dda5e43 3021 .rpc_resp = &res,
1da177e4
LT		 3022 };
3023
cccef3b9 3024 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3025}
3026
3027static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3028{
3029 struct nfs4_exception exception = { };
3030 int err;
3031
3032 do {
3033 err = nfs4_handle_exception(server,
3034 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3035 &exception);
3036 } while (exception.retry);
3037 return err;
3038}
3039
3040static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3041{
0e574af1 3042 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3043 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3044}
3045
3046static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3047 struct nfs_pathconf *pathconf)
3048{
3049 struct nfs4_pathconf_arg args = {
3050 .fh = fhandle,
3051 .bitmask = server->attr_bitmask,
3052 };
d45b2989
BH		 3053 struct nfs4_pathconf_res res = {
3054 .pathconf = pathconf,
3055 };
1da177e4
LT		 3056 struct rpc_message msg = {
3057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3058 .rpc_argp = &args,
d45b2989 3059 .rpc_resp = &res,
1da177e4
LT		 3060 };
3061
3062 /* None of the pathconf attributes are mandatory to implement */
3063 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3064 memset(pathconf, 0, sizeof(*pathconf));
3065 return 0;
3066 }
3067
0e574af1 3068 nfs_fattr_init(pathconf->fattr);
cccef3b9 3069 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3070}
3071
3072static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3073 struct nfs_pathconf *pathconf)
3074{
3075 struct nfs4_exception exception = { };
3076 int err;
3077
3078 do {
3079 err = nfs4_handle_exception(server,
3080 _nfs4_proc_pathconf(server, fhandle, pathconf),
3081 &exception);
3082 } while (exception.retry);
3083 return err;
3084}
3085
ec06c096 3086static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3087{
ec06c096 3088 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3089
f11c88af
AA		 3090 dprintk("--> %s\n", __func__);
3091
f11c88af
AA		 3092 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3093
9e33bed5 3094 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3095 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3096 return -EAGAIN;
1da177e4 3097 }
8850df99
TM		 3098
3099 nfs_invalidate_atime(data->inode);
1da177e4 3100 if (task->tk_status > 0)
ec06c096
TM		 3101 renew_lease(server, data->timestamp);
3102 return 0;
1da177e4
LT		 3103}
3104
bdc7f021 3105static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3106{
1da177e4 3107 data->timestamp = jiffies;
bdc7f021 3108 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3109}
3110
788e7a89 3111static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3112{
1da177e4
LT		 3113 struct inode *inode = data->inode;
3114
def6ed7e
AA		 3115 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3116 task->tk_status);
3117
9e33bed5 3118 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3119 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3120 return -EAGAIN;
1da177e4 3121 }
4f9838c7 3122 if (task->tk_status >= 0) {
1da177e4 3123 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3124 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3125 }
788e7a89 3126 return 0;
1da177e4
LT		 3127}
3128
bdc7f021 3129static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3130{
bdc7f021
TM		 3131 struct nfs_server *server = NFS_SERVER(data->inode);
3132
a65318bf 3133 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3134 data->res.server = server;
1da177e4
LT		 3135 data->timestamp = jiffies;
3136
bdc7f021 3137 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3138}
3139
788e7a89 3140static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3141{
1da177e4
LT		 3142 struct inode *inode = data->inode;
3143
21d9a851
AA		 3144 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3145 task->tk_status);
9e33bed5 3146 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3147 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3148 return -EAGAIN;
1da177e4 3149 }
9e08a3c5 3150 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3151 return 0;
1da177e4
LT		 3152}
3153
bdc7f021 3154static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3155{
788e7a89 3156 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3157
a65318bf 3158 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3159 data->res.server = server;
bdc7f021 3160 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3161}
3162
9bc4e3ca
CL		 3163struct nfs4_renewdata {
3164 struct nfs_client *client;
3165 unsigned long timestamp;
3166};
3167
1da177e4
LT		 3168/*
3169 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3170 * standalone procedure for queueing an asynchronous RENEW.
3171 */
9bc4e3ca 3172static void nfs4_renew_release(void *calldata)
dc96aef9 3173{
9bc4e3ca
CL		 3174 struct nfs4_renewdata *data = calldata;
3175 struct nfs_client *clp = data->client;
dc96aef9 3176
0851de06
AB		 3177 if (atomic_read(&clp->cl_count) > 1)
3178 nfs4_schedule_state_renewal(clp);
3179 nfs_put_client(clp);
9bc4e3ca 3180 kfree(data);
dc96aef9
AB		 3181}
3182
9bc4e3ca 3183static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3184{
9bc4e3ca
CL		 3185 struct nfs4_renewdata *data = calldata;
3186 struct nfs_client *clp = data->client;
3187 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3188
3189 if (task->tk_status < 0) {
95baa25c
TM		 3190 /* Unless we're shutting down, schedule state recovery! */
3191 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3192 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3193 return;
3194 }
3195 spin_lock(&clp->cl_lock);
3196 if (time_before(clp->cl_last_renewal,timestamp))
3197 clp->cl_last_renewal = timestamp;
3198 spin_unlock(&clp->cl_lock);
3199}
3200
963d8fe5
TM		 3201static const struct rpc_call_ops nfs4_renew_ops = {
3202 .rpc_call_done = nfs4_renew_done,
dc96aef9 3203 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3204};
3205
adfa6f98 3206int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3207{
3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3210 .rpc_argp = clp,
b4454fe1 3211 .rpc_cred = cred,
1da177e4 3212 };
9bc4e3ca 3213 struct nfs4_renewdata *data;
1da177e4 3214
0851de06
AB		 3215 if (!atomic_inc_not_zero(&clp->cl_count))
3216 return -EIO;
9bc4e3ca
CL		 3217 data = kmalloc(sizeof(*data), GFP_KERNEL);
3218 if (data == NULL)
3219 return -ENOMEM;
3220 data->client = clp;
3221 data->timestamp = jiffies;
1da177e4 3222 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3223 &nfs4_renew_ops, data);
1da177e4
LT		 3224}
3225
adfa6f98 3226int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3227{
3228 struct rpc_message msg = {
3229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3230 .rpc_argp = clp,
b4454fe1 3231 .rpc_cred = cred,
1da177e4
LT		 3232 };
3233 unsigned long now = jiffies;
3234 int status;
3235
3236 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3237 if (status < 0)
3238 return status;
3239 spin_lock(&clp->cl_lock);
3240 if (time_before(clp->cl_last_renewal,now))
3241 clp->cl_last_renewal = now;
3242 spin_unlock(&clp->cl_lock);
3243 return 0;
3244}
3245
aa1870af
BF		 3246static inline int nfs4_server_supports_acls(struct nfs_server *server)
3247{
3248 return (server->caps & NFS_CAP_ACLS)
3249 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3250 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3251}
3252
3253/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3254 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3255 * the stack.
3256 */
3257#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3258
3259static void buf_to_pages(const void *buf, size_t buflen,
3260 struct page **pages, unsigned int *pgbase)
3261{
3262 const void *p = buf;
3263
3264 *pgbase = offset_in_page(buf);
3265 p -= *pgbase;
3266 while (p < buf + buflen) {
3267 *(pages++) = virt_to_page(p);
3268 p += PAGE_CACHE_SIZE;
3269 }
3270}
3271
e50a1c2e
BF		 3272struct nfs4_cached_acl {
3273 int cached;
3274 size_t len;
3e9d4154 3275 char data[0];
e50a1c2e
BF		 3276};
3277
3278static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3279{
3280 struct nfs_inode *nfsi = NFS_I(inode);
3281
3282 spin_lock(&inode->i_lock);
3283 kfree(nfsi->nfs4_acl);
3284 nfsi->nfs4_acl = acl;
3285 spin_unlock(&inode->i_lock);
3286}
3287
3288static void nfs4_zap_acl_attr(struct inode *inode)
3289{
3290 nfs4_set_cached_acl(inode, NULL);
3291}
3292
3293static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3294{
3295 struct nfs_inode *nfsi = NFS_I(inode);
3296 struct nfs4_cached_acl *acl;
3297 int ret = -ENOENT;
3298
3299 spin_lock(&inode->i_lock);
3300 acl = nfsi->nfs4_acl;
3301 if (acl == NULL)
3302 goto out;
3303 if (buf == NULL) /* user is just asking for length */
3304 goto out_len;
3305 if (acl->cached == 0)
3306 goto out;
3307 ret = -ERANGE; /* see getxattr(2) man page */
3308 if (acl->len > buflen)
3309 goto out;
3310 memcpy(buf, acl->data, acl->len);
3311out_len:
3312 ret = acl->len;
3313out:
3314 spin_unlock(&inode->i_lock);
3315 return ret;
3316}
3317
3318static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3319{
3320 struct nfs4_cached_acl *acl;
3321
3322 if (buf && acl_len <= PAGE_SIZE) {
3323 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3324 if (acl == NULL)
3325 goto out;
3326 acl->cached = 1;
3327 memcpy(acl->data, buf, acl_len);
3328 } else {
3329 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3330 if (acl == NULL)
3331 goto out;
3332 acl->cached = 0;
3333 }
3334 acl->len = acl_len;
3335out:
3336 nfs4_set_cached_acl(inode, acl);
3337}
3338
16b4289c 3339static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3340{
aa1870af
BF		 3341 struct page *pages[NFS4ACL_MAXPAGES];
3342 struct nfs_getaclargs args = {
3343 .fh = NFS_FH(inode),
3344 .acl_pages = pages,
3345 .acl_len = buflen,
3346 };
663c79b3
BH		 3347 struct nfs_getaclres res = {
3348 .acl_len = buflen,
3349 };
e50a1c2e 3350 void *resp_buf;
aa1870af
BF		 3351 struct rpc_message msg = {
3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3353 .rpc_argp = &args,
663c79b3 3354 .rpc_resp = &res,
aa1870af 3355 };
e50a1c2e 3356 struct page *localpage = NULL;
aa1870af
BF		 3357 int ret;
3358
e50a1c2e
BF		 3359 if (buflen < PAGE_SIZE) {
3360 /* As long as we're doing a round trip to the server anyway,
3361 * let's be prepared for a page of acl data. */
3362 localpage = alloc_page(GFP_KERNEL);
3363 resp_buf = page_address(localpage);
3364 if (localpage == NULL)
3365 return -ENOMEM;
3366 args.acl_pages[0] = localpage;
3367 args.acl_pgbase = 0;
663c79b3 3368 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3369 } else {
3370 resp_buf = buf;
3371 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3372 }
cccef3b9 3373 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3374 if (ret)
3375 goto out_free;
663c79b3
BH		 3376 if (res.acl_len > args.acl_len)
3377 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3378 else
663c79b3 3379 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3380 if (buf) {
3381 ret = -ERANGE;
663c79b3 3382 if (res.acl_len > buflen)
e50a1c2e
BF		 3383 goto out_free;
3384 if (localpage)
663c79b3 3385 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3386 }
663c79b3 3387 ret = res.acl_len;
e50a1c2e
BF		 3388out_free:
3389 if (localpage)
3390 __free_page(localpage);
aa1870af
BF		 3391 return ret;
3392}
3393
16b4289c
TM		 3394static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3395{
3396 struct nfs4_exception exception = { };
3397 ssize_t ret;
3398 do {
3399 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3400 if (ret >= 0)
3401 break;
3402 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3403 } while (exception.retry);
3404 return ret;
3405}
3406
e50a1c2e
BF		 3407static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3408{
3409 struct nfs_server *server = NFS_SERVER(inode);
3410 int ret;
3411
3412 if (!nfs4_server_supports_acls(server))
3413 return -EOPNOTSUPP;
3414 ret = nfs_revalidate_inode(server, inode);
3415 if (ret < 0)
3416 return ret;
3417 ret = nfs4_read_cached_acl(inode, buf, buflen);
3418 if (ret != -ENOENT)
3419 return ret;
3420 return nfs4_get_acl_uncached(inode, buf, buflen);
3421}
3422
16b4289c 3423static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3424{
3425 struct nfs_server *server = NFS_SERVER(inode);
3426 struct page *pages[NFS4ACL_MAXPAGES];
3427 struct nfs_setaclargs arg = {
3428 .fh = NFS_FH(inode),
3429 .acl_pages = pages,
3430 .acl_len = buflen,
3431 };
73c403a9 3432 struct nfs_setaclres res;
4b580ee3
BF		 3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3435 .rpc_argp = &arg,
73c403a9 3436 .rpc_resp = &res,
4b580ee3
BF		 3437 };
3438 int ret;
3439
3440 if (!nfs4_server_supports_acls(server))
3441 return -EOPNOTSUPP;
642ac549 3442 nfs_inode_return_delegation(inode);
4b580ee3 3443 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3444 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3445 nfs_access_zap_cache(inode);
3446 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3447 return ret;
3448}
3449
16b4289c
TM		 3450static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3451{
3452 struct nfs4_exception exception = { };
3453 int err;
3454 do {
3455 err = nfs4_handle_exception(NFS_SERVER(inode),
3456 __nfs4_proc_set_acl(inode, buf, buflen),
3457 &exception);
3458 } while (exception.retry);
3459 return err;
3460}
3461
1da177e4 3462static int
aa5190d0 3463nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3464{
aa5190d0
TM		 3465 struct nfs_client *clp = server->nfs_client;
3466
3467 if (task->tk_status >= 0)
1da177e4
LT		 3468 return 0;
3469 switch(task->tk_status) {
9e33bed5
TM		 3470 case -NFS4ERR_ADMIN_REVOKED:
3471 case -NFS4ERR_BAD_STATEID:
3472 case -NFS4ERR_OPENMODE:
3473 if (state == NULL)
3474 break;
3475 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3476 goto do_state_recovery;
1da177e4 3477 case -NFS4ERR_STALE_STATEID:
a2c0b9e2
TM		 3478 if (state == NULL)
3479 break;
3480 nfs4_state_mark_reclaim_reboot(clp, state);
3481 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3482 case -NFS4ERR_EXPIRED:
a2c0b9e2 3483 goto do_state_recovery;
4745e315
AA		 3484#if defined(CONFIG_NFS_V4_1)
3485 case -NFS4ERR_BADSESSION:
3486 case -NFS4ERR_BADSLOT:
3487 case -NFS4ERR_BAD_HIGH_SLOT:
3488 case -NFS4ERR_DEADSESSION:
3489 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3490 case -NFS4ERR_SEQ_FALSE_RETRY:
3491 case -NFS4ERR_SEQ_MISORDERED:
3492 dprintk("%s ERROR %d, Reset session\n", __func__,
3493 task->tk_status);
0b9e2d41 3494 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3495 task->tk_status = 0;
3496 return -EAGAIN;
3497#endif /* CONFIG_NFS_V4_1 */
1da177e4 3498 case -NFS4ERR_DELAY:
aa5190d0 3499 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3500 case -NFS4ERR_GRACE:
2c643488 3501 case -EKEYEXPIRED:
1da177e4
LT		 3502 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3503 task->tk_status = 0;
3504 return -EAGAIN;
3505 case -NFS4ERR_OLD_STATEID:
3506 task->tk_status = 0;
3507 return -EAGAIN;
3508 }
3509 task->tk_status = nfs4_map_errors(task->tk_status);
3510 return 0;
a2c0b9e2
TM		 3511do_state_recovery:
3512 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3513 nfs4_schedule_state_recovery(clp);
3514 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3515 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3516 task->tk_status = 0;
3517 return -EAGAIN;
1da177e4
LT		 3518}
3519
bb8b27e5
TM		 3520int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3521 unsigned short port, struct rpc_cred *cred,
3522 struct nfs4_setclientid_res *res)
1da177e4
LT		 3523{
3524 nfs4_verifier sc_verifier;
3525 struct nfs4_setclientid setclientid = {
3526 .sc_verifier = &sc_verifier,
3527 .sc_prog = program,
3528 };
3529 struct rpc_message msg = {
3530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3531 .rpc_argp = &setclientid,
bb8b27e5 3532 .rpc_resp = res,
286d7d6a 3533 .rpc_cred = cred,
1da177e4 3534 };
bc4785cd 3535 __be32 *p;
1da177e4
LT		 3536 int loop = 0;
3537 int status;
3538
bc4785cd 3539 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3540 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3541 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3542
3543 for(;;) {
3544 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3545 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3546 clp->cl_ipaddr,
3547 rpc_peeraddr2str(clp->cl_rpcclient,
3548 RPC_DISPLAY_ADDR),
69dd716c
TM		 3549 rpc_peeraddr2str(clp->cl_rpcclient,
3550 RPC_DISPLAY_PROTO),
78ea323b 3551 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3552 clp->cl_id_uniquifier);
3553 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3554 sizeof(setclientid.sc_netid),
3555 rpc_peeraddr2str(clp->cl_rpcclient,
3556 RPC_DISPLAY_NETID));
1da177e4 3557 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3558 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3559 clp->cl_ipaddr, port >> 8, port & 255);
3560
3561 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3562 if (status != -NFS4ERR_CLID_INUSE)
3563 break;
3564 if (signalled())
3565 break;
3566 if (loop++ & 1)
3567 ssleep(clp->cl_lease_time + 1);
3568 else
3569 if (++clp->cl_id_uniquifier == 0)
3570 break;
3571 }
3572 return status;
3573}
3574
bb8b27e5
TM		 3575static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3576 struct nfs4_setclientid_res *arg,
3577 struct rpc_cred *cred)
1da177e4
LT		 3578{
3579 struct nfs_fsinfo fsinfo;
3580 struct rpc_message msg = {
3581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3582 .rpc_argp = arg,
1da177e4 3583 .rpc_resp = &fsinfo,
286d7d6a 3584 .rpc_cred = cred,
1da177e4
LT		 3585 };
3586 unsigned long now;
3587 int status;
3588
3589 now = jiffies;
3590 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3591 if (status == 0) {
3592 spin_lock(&clp->cl_lock);
3593 clp->cl_lease_time = fsinfo.lease_time * HZ;
3594 clp->cl_last_renewal = now;
3595 spin_unlock(&clp->cl_lock);
3596 }
3597 return status;
3598}
3599
bb8b27e5
TM		 3600int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3601 struct nfs4_setclientid_res *arg,
3602 struct rpc_cred *cred)
51581f3b 3603{
77e03677 3604 long timeout = 0;
51581f3b
TM		 3605 int err;
3606 do {
bb8b27e5 3607 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3608 switch (err) {
3609 case 0:
3610 return err;
3611 case -NFS4ERR_RESOURCE:
3612 /* The IBM lawyers misread another document! */
3613 case -NFS4ERR_DELAY:
2c643488 3614 case -EKEYEXPIRED:
51581f3b
TM		 3615 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3616 }
3617 } while (err == 0);
3618 return err;
3619}
3620
fe650407
TM		 3621struct nfs4_delegreturndata {
3622 struct nfs4_delegreturnargs args;
fa178f29 3623 struct nfs4_delegreturnres res;
fe650407
TM		 3624 struct nfs_fh fh;
3625 nfs4_stateid stateid;
26e976a8 3626 unsigned long timestamp;
fa178f29 3627 struct nfs_fattr fattr;
fe650407
TM		 3628 int rpc_status;
3629};
3630
fe650407
TM		 3631static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3632{
3633 struct nfs4_delegreturndata *data = calldata;
938e1010 3634
d61e612a
TM		 3635 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3636 task->tk_status);
938e1010 3637
79708861
RL		 3638 switch (task->tk_status) {
3639 case -NFS4ERR_STALE_STATEID:
3640 case -NFS4ERR_EXPIRED:
3641 case 0:
fa178f29 3642 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3643 break;
3644 default:
3645 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3646 -EAGAIN) {
3647 nfs_restart_rpc(task, data->res.server->nfs_client);
3648 return;
3649 }
3650 }
3651 data->rpc_status = task->tk_status;
fe650407
TM		 3652}
3653
3654static void nfs4_delegreturn_release(void *calldata)
3655{
fe650407
TM		 3656 kfree(calldata);
3657}
3658
938e1010
AA		 3659#if defined(CONFIG_NFS_V4_1)
3660static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3661{
3662 struct nfs4_delegreturndata *d_data;
3663
3664 d_data = (struct nfs4_delegreturndata *)data;
3665
035168ab 3666 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3667 &d_data->args.seq_args,
3668 &d_data->res.seq_res, 1, task))
3669 return;
3670 rpc_call_start(task);
3671}
3672#endif /* CONFIG_NFS_V4_1 */
3673
c8d149f3 3674static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3675#if defined(CONFIG_NFS_V4_1)
3676 .rpc_call_prepare = nfs4_delegreturn_prepare,
3677#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3678 .rpc_call_done = nfs4_delegreturn_done,
3679 .rpc_release = nfs4_delegreturn_release,
3680};
3681
e6f81075 3682static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3683{
3684 struct nfs4_delegreturndata *data;
fa178f29 3685 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3686 struct rpc_task *task;
5138fde0
TM		 3687 struct rpc_message msg = {
3688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3689 .rpc_cred = cred,
3690 };
c970aa85
TM		 3691 struct rpc_task_setup task_setup_data = {
3692 .rpc_client = server->client,
5138fde0 3693 .rpc_message = &msg,
c970aa85
TM		 3694 .callback_ops = &nfs4_delegreturn_ops,
3695 .flags = RPC_TASK_ASYNC,
3696 };
e6f81075 3697 int status = 0;
fe650407 3698
8535b2be 3699 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3700 if (data == NULL)
3701 return -ENOMEM;
3702 data->args.fhandle = &data->fh;
3703 data->args.stateid = &data->stateid;
fa178f29 3704 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3705 nfs_copy_fh(&data->fh, NFS_FH(inode));
3706 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3707 data->res.fattr = &data->fattr;
3708 data->res.server = server;
5f7dbd5c 3709 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3710 nfs_fattr_init(data->res.fattr);
26e976a8 3711 data->timestamp = jiffies;
fe650407
TM		 3712 data->rpc_status = 0;
3713
c970aa85 3714 task_setup_data.callback_data = data;
5138fde0
TM		 3715 msg.rpc_argp = &data->args,
3716 msg.rpc_resp = &data->res,
c970aa85 3717 task = rpc_run_task(&task_setup_data);
7a1218a2 3718 if (IS_ERR(task))
fe650407 3719 return PTR_ERR(task);
e6f81075
TM		 3720 if (!issync)
3721 goto out;
fe650407 3722 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3723 if (status != 0)
3724 goto out;
3725 status = data->rpc_status;
3726 if (status != 0)
3727 goto out;
3728 nfs_refresh_inode(inode, &data->fattr);
3729out:
e6b3c4db 3730 rpc_put_task(task);
fe650407 3731 return status;
1da177e4
LT		 3732}
3733
e6f81075 3734int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3735{
3736 struct nfs_server *server = NFS_SERVER(inode);
3737 struct nfs4_exception exception = { };
3738 int err;
3739 do {
e6f81075 3740 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3741 switch (err) {
3742 case -NFS4ERR_STALE_STATEID:
3743 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3744 case 0:
3745 return 0;
3746 }
3747 err = nfs4_handle_exception(server, err, &exception);
3748 } while (exception.retry);
3749 return err;
3750}
3751
3752#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3753#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3754
3755/*
3756 * sleep, with exponential backoff, and retry the LOCK operation.
3757 */
3758static unsigned long
3759nfs4_set_lock_task_retry(unsigned long timeout)
3760{
150030b7 3761 schedule_timeout_killable(timeout);
1da177e4
LT		 3762 timeout <<= 1;
3763 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3764 return NFS4_LOCK_MAXTIMEOUT;
3765 return timeout;
3766}
3767
1da177e4
LT		 3768static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3769{
3770 struct inode *inode = state->inode;
3771 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3772 struct nfs_client *clp = server->nfs_client;
911d1aaf 3773 struct nfs_lockt_args arg = {
1da177e4 3774 .fh = NFS_FH(inode),
911d1aaf 3775 .fl = request,
1da177e4 3776 };
911d1aaf
TM		 3777 struct nfs_lockt_res res = {
3778 .denied = request,
1da177e4
LT		 3779 };
3780 struct rpc_message msg = {
3781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3782 .rpc_argp = &arg,
3783 .rpc_resp = &res,
3784 .rpc_cred = state->owner->so_cred,
3785 };
1da177e4
LT		 3786 struct nfs4_lock_state *lsp;
3787 int status;
3788
911d1aaf 3789 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3790 status = nfs4_set_lock_state(state, request);
3791 if (status != 0)
3792 goto out;
3793 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3794 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3795 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3796 switch (status) {
3797 case 0:
3798 request->fl_type = F_UNLCK;
3799 break;
3800 case -NFS4ERR_DENIED:
3801 status = 0;
1da177e4 3802 }
70cc6487 3803 request->fl_ops->fl_release_private(request);
8d0a8a9d 3804out:
1da177e4
LT		 3805 return status;
3806}
3807
3808static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3809{
3810 struct nfs4_exception exception = { };
3811 int err;
3812
3813 do {
3814 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3815 _nfs4_proc_getlk(state, cmd, request),
3816 &exception);
3817 } while (exception.retry);
3818 return err;
3819}
3820
3821static int do_vfs_lock(struct file *file, struct file_lock *fl)
3822{
3823 int res = 0;
3824 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3825 case FL_POSIX:
3826 res = posix_lock_file_wait(file, fl);
3827 break;
3828 case FL_FLOCK:
3829 res = flock_lock_file_wait(file, fl);
3830 break;
3831 default:
3832 BUG();
3833 }
1da177e4
LT		 3834 return res;
3835}
3836
faf5f49c 3837struct nfs4_unlockdata {
911d1aaf
TM		 3838 struct nfs_locku_args arg;
3839 struct nfs_locku_res res;
faf5f49c
TM		 3840 struct nfs4_lock_state *lsp;
3841 struct nfs_open_context *ctx;
911d1aaf
TM		 3842 struct file_lock fl;
3843 const struct nfs_server *server;
26e976a8 3844 unsigned long timestamp;
faf5f49c
TM		 3845};
3846
911d1aaf
TM		 3847static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3848 struct nfs_open_context *ctx,
3849 struct nfs4_lock_state *lsp,
3850 struct nfs_seqid *seqid)
3851{
3852 struct nfs4_unlockdata *p;
3853 struct inode *inode = lsp->ls_state->inode;
3854
8535b2be 3855 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3856 if (p == NULL)
3857 return NULL;
3858 p->arg.fh = NFS_FH(inode);
3859 p->arg.fl = &p->fl;
3860 p->arg.seqid = seqid;
c1d51931 3861 p->res.seqid = seqid;
5f7dbd5c 3862 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3863 p->arg.stateid = &lsp->ls_stateid;
3864 p->lsp = lsp;
3865 atomic_inc(&lsp->ls_count);
3866 /* Ensure we don't close file until we're done freeing locks! */
3867 p->ctx = get_nfs_open_context(ctx);
3868 memcpy(&p->fl, fl, sizeof(p->fl));
3869 p->server = NFS_SERVER(inode);
3870 return p;
3871}
3872
06f814a3 3873static void nfs4_locku_release_calldata(void *data)
faf5f49c 3874{
963d8fe5 3875 struct nfs4_unlockdata *calldata = data;
911d1aaf 3876 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3877 nfs4_put_lock_state(calldata->lsp);
3878 put_nfs_open_context(calldata->ctx);
3879 kfree(calldata);
faf5f49c
TM		 3880}
3881
963d8fe5 3882static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3883{
963d8fe5 3884 struct nfs4_unlockdata *calldata = data;
faf5f49c 3885
a893693c
AA		 3886 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3887 task->tk_status);
06f814a3
TM		 3888 if (RPC_ASSASSINATED(task))
3889 return;
faf5f49c
TM		 3890 switch (task->tk_status) {
3891 case 0:
3892 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3893 calldata->res.stateid.data,
faf5f49c 3894 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3895 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3896 break;
9e33bed5
TM		 3897 case -NFS4ERR_BAD_STATEID:
3898 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3899 case -NFS4ERR_STALE_STATEID:
3900 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3901 break;
3902 default:
9e33bed5 3903 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3904 nfs_restart_rpc(task,
d61e612a 3905 calldata->server->nfs_client);
faf5f49c 3906 }
faf5f49c
TM		 3907}
3908
4ce70ada 3909static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3910{
4ce70ada 3911 struct nfs4_unlockdata *calldata = data;
faf5f49c 3912
911d1aaf 3913 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3914 return;
3915 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3916 /* Note: exit _without_ running nfs4_locku_done */
3917 task->tk_action = NULL;
faf5f49c
TM		 3918 return;
3919 }
26e976a8 3920 calldata->timestamp = jiffies;
035168ab 3921 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3922 &calldata->arg.seq_args,
3923 &calldata->res.seq_res, 1, task))
3924 return;
5138fde0 3925 rpc_call_start(task);
faf5f49c
TM		 3926}
3927
963d8fe5 3928static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3929 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3930 .rpc_call_done = nfs4_locku_done,
06f814a3 3931 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3932};
3933
a5d16a4d
TM		 3934static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3935 struct nfs_open_context *ctx,
3936 struct nfs4_lock_state *lsp,
3937 struct nfs_seqid *seqid)
3938{
3939 struct nfs4_unlockdata *data;
5138fde0
TM		 3940 struct rpc_message msg = {
3941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3942 .rpc_cred = ctx->cred,
3943 };
c970aa85
TM		 3944 struct rpc_task_setup task_setup_data = {
3945 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3946 .rpc_message = &msg,
c970aa85 3947 .callback_ops = &nfs4_locku_ops,
101070ca 3948 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3949 .flags = RPC_TASK_ASYNC,
3950 };
a5d16a4d 3951
137d6aca
FF		 3952 /* Ensure this is an unlock - when canceling a lock, the
3953 * canceled lock is passed in, and it won't be an unlock.
3954 */
3955 fl->fl_type = F_UNLCK;
3956
a5d16a4d
TM		 3957 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3958 if (data == NULL) {
3959 nfs_free_seqid(seqid);
3960 return ERR_PTR(-ENOMEM);
3961 }
3962
5138fde0
TM		 3963 msg.rpc_argp = &data->arg,
3964 msg.rpc_resp = &data->res,
c970aa85
TM		 3965 task_setup_data.callback_data = data;
3966 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3967}
3968
faf5f49c
TM		 3969static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3970{
19e03c57 3971 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3972 struct nfs_seqid *seqid;
1da177e4 3973 struct nfs4_lock_state *lsp;
06f814a3
TM		 3974 struct rpc_task *task;
3975 int status = 0;
536ff0f8 3976 unsigned char fl_flags = request->fl_flags;
faf5f49c 3977
8d0a8a9d 3978 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3979 /* Unlock _before_ we do the RPC call */
3980 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3981 down_read(&nfsi->rwsem);
3982 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3983 up_read(&nfsi->rwsem);
9b073574 3984 goto out;
19e03c57
TM		 3985 }
3986 up_read(&nfsi->rwsem);
8d0a8a9d 3987 if (status != 0)
9b073574
TM		 3988 goto out;
3989 /* Is this a delegated lock? */
3990 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3991 goto out;
8d0a8a9d 3992 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3993 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3994 status = -ENOMEM;
911d1aaf 3995 if (seqid == NULL)
9b073574 3996 goto out;
cd3758e3 3997 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3998 status = PTR_ERR(task);
3999 if (IS_ERR(task))
9b073574 4000 goto out;
a5d16a4d 4001 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4002 rpc_put_task(task);
9b073574 4003out:
536ff0f8 4004 request->fl_flags = fl_flags;
1da177e4
LT		 4005 return status;
4006}
4007
a5d16a4d
TM		 4008struct nfs4_lockdata {
4009 struct nfs_lock_args arg;
4010 struct nfs_lock_res res;
4011 struct nfs4_lock_state *lsp;
4012 struct nfs_open_context *ctx;
4013 struct file_lock fl;
26e976a8 4014 unsigned long timestamp;
a5d16a4d
TM		 4015 int rpc_status;
4016 int cancelled;
66179efe 4017 struct nfs_server *server;
a5d16a4d
TM		 4018};
4019
4020static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4021 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4022 gfp_t gfp_mask)
1da177e4 4023{
a5d16a4d
TM		 4024 struct nfs4_lockdata *p;
4025 struct inode *inode = lsp->ls_state->inode;
1da177e4 4026 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4027
8535b2be 4028 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4029 if (p == NULL)
4030 return NULL;
4031
4032 p->arg.fh = NFS_FH(inode);
4033 p->arg.fl = &p->fl;
8535b2be 4034 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4035 if (p->arg.open_seqid == NULL)
4036 goto out_free;
8535b2be 4037 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4038 if (p->arg.lock_seqid == NULL)
2f74c0a0 4039 goto out_free_seqid;
a5d16a4d 4040 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4041 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4042 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 4043 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 4044 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 4045 p->lsp = lsp;
66179efe 4046 p->server = server;
a5d16a4d
TM		 4047 atomic_inc(&lsp->ls_count);
4048 p->ctx = get_nfs_open_context(ctx);
4049 memcpy(&p->fl, fl, sizeof(p->fl));
4050 return p;
2f74c0a0
TM		 4051out_free_seqid:
4052 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4053out_free:
4054 kfree(p);
4055 return NULL;
4056}
4057
4058static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4059{
4060 struct nfs4_lockdata *data = calldata;
4061 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4062
3110ff80 4063 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4064 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4065 return;
a5d16a4d
TM		 4066 /* Do we need to do an open_to_lock_owner? */
4067 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4068 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4069 return;
a5d16a4d
TM		 4070 data->arg.open_stateid = &state->stateid;
4071 data->arg.new_lock_owner = 1;
c1d51931 4072 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4073 } else
4074 data->arg.new_lock_owner = 0;
26e976a8 4075 data->timestamp = jiffies;
035168ab
TM		 4076 if (nfs4_setup_sequence(data->server,
4077 &data->arg.seq_args,
66179efe
AA		 4078 &data->res.seq_res, 1, task))
4079 return;
5138fde0 4080 rpc_call_start(task);
3110ff80 4081 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4082}
4083
b257957e
AB		 4084static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4085{
4086 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4087 nfs4_lock_prepare(task, calldata);
4088}
4089
a5d16a4d
TM		 4090static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4091{
4092 struct nfs4_lockdata *data = calldata;
4093
3110ff80 4094 dprintk("%s: begin!\n", __func__);
a5d16a4d 4095
d61e612a
TM		 4096 nfs4_sequence_done(data->server, &data->res.seq_res,
4097 task->tk_status);
66179efe 4098
a5d16a4d
TM		 4099 data->rpc_status = task->tk_status;
4100 if (RPC_ASSASSINATED(task))
4101 goto out;
4102 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4103 if (data->rpc_status == 0)
4104 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4105 else
4106 goto out;
4107 }
4108 if (data->rpc_status == 0) {
4109 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4110 sizeof(data->lsp->ls_stateid.data));
4111 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4112 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4113 }
a5d16a4d 4114out:
3110ff80 4115 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4116}
4117
4118static void nfs4_lock_release(void *calldata)
4119{
4120 struct nfs4_lockdata *data = calldata;
4121
3110ff80 4122 dprintk("%s: begin!\n", __func__);
2f74c0a0 4123 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4124 if (data->cancelled != 0) {
4125 struct rpc_task *task;
4126 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4127 data->arg.lock_seqid);
4128 if (!IS_ERR(task))
e6b3c4db 4129 rpc_put_task(task);
3110ff80 4130 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4131 } else
4132 nfs_free_seqid(data->arg.lock_seqid);
4133 nfs4_put_lock_state(data->lsp);
4134 put_nfs_open_context(data->ctx);
4135 kfree(data);
3110ff80 4136 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4137}
4138
4139static const struct rpc_call_ops nfs4_lock_ops = {
4140 .rpc_call_prepare = nfs4_lock_prepare,
4141 .rpc_call_done = nfs4_lock_done,
4142 .rpc_release = nfs4_lock_release,
4143};
4144
b257957e
AB		 4145static const struct rpc_call_ops nfs4_recover_lock_ops = {
4146 .rpc_call_prepare = nfs4_recover_lock_prepare,
4147 .rpc_call_done = nfs4_lock_done,
4148 .rpc_release = nfs4_lock_release,
4149};
4150
2bee72a6
TM		 4151static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4152{
4153 struct nfs_client *clp = server->nfs_client;
4154 struct nfs4_state *state = lsp->ls_state;
4155
4156 switch (error) {
4157 case -NFS4ERR_ADMIN_REVOKED:
4158 case -NFS4ERR_BAD_STATEID:
4159 case -NFS4ERR_EXPIRED:
4160 if (new_lock_owner != 0 ||
4161 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4162 nfs4_state_mark_reclaim_nograce(clp, state);
4163 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4164 break;
4165 case -NFS4ERR_STALE_STATEID:
4166 if (new_lock_owner != 0 ||
4167 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4168 nfs4_state_mark_reclaim_reboot(clp, state);
4169 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4170 };
4171}
4172
afe6c27c 4173static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4174{
4175 struct nfs4_lockdata *data;
4176 struct rpc_task *task;
5138fde0
TM		 4177 struct rpc_message msg = {
4178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4179 .rpc_cred = state->owner->so_cred,
4180 };
c970aa85
TM		 4181 struct rpc_task_setup task_setup_data = {
4182 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4183 .rpc_message = &msg,
c970aa85 4184 .callback_ops = &nfs4_lock_ops,
101070ca 4185 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4186 .flags = RPC_TASK_ASYNC,
4187 };
a5d16a4d
TM		 4188 int ret;
4189
3110ff80 4190 dprintk("%s: begin!\n", __func__);
cd3758e3 4191 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4192 fl->fl_u.nfs4_fl.owner,
4193 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4194 if (data == NULL)
4195 return -ENOMEM;
4196 if (IS_SETLKW(cmd))
4197 data->arg.block = 1;
b257957e
AB		 4198 if (recovery_type > NFS_LOCK_NEW) {
4199 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4200 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4201 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4202 }
5138fde0
TM		 4203 msg.rpc_argp = &data->arg,
4204 msg.rpc_resp = &data->res,
c970aa85
TM		 4205 task_setup_data.callback_data = data;
4206 task = rpc_run_task(&task_setup_data);
7a1218a2 4207 if (IS_ERR(task))
a5d16a4d 4208 return PTR_ERR(task);
a5d16a4d
TM		 4209 ret = nfs4_wait_for_completion_rpc_task(task);
4210 if (ret == 0) {
4211 ret = data->rpc_status;
2bee72a6
TM		 4212 if (ret)
4213 nfs4_handle_setlk_error(data->server, data->lsp,
4214 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4215 } else
4216 data->cancelled = 1;
e6b3c4db 4217 rpc_put_task(task);
3110ff80 4218 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4219 return ret;
1da177e4
LT		 4220}
4221
4222static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4223{
202b50dc
TM		 4224 struct nfs_server *server = NFS_SERVER(state->inode);
4225 struct nfs4_exception exception = { };
4226 int err;
4227
4228 do {
42a2d13e
TM		 4229 /* Cache the lock if possible... */
4230 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4231 return 0;
afe6c27c 4232 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
2c643488 4233 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
202b50dc
TM		 4234 break;
4235 nfs4_handle_exception(server, err, &exception);
4236 } while (exception.retry);
4237 return err;
1da177e4
LT		 4238}
4239
4240static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4241{
202b50dc
TM		 4242 struct nfs_server *server = NFS_SERVER(state->inode);
4243 struct nfs4_exception exception = { };
4244 int err;
4245
6bfc93ef
TM		 4246 err = nfs4_set_lock_state(state, request);
4247 if (err != 0)
4248 return err;
202b50dc 4249 do {
42a2d13e
TM		 4250 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4251 return 0;
afe6c27c 4252 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4253 switch (err) {
4254 default:
4255 goto out;
4256 case -NFS4ERR_GRACE:
4257 case -NFS4ERR_DELAY:
2c643488 4258 case -EKEYEXPIRED:
a9ed2e25
TM		 4259 nfs4_handle_exception(server, err, &exception);
4260 err = 0;
4261 }
202b50dc 4262 } while (exception.retry);
a9ed2e25 4263out:
202b50dc 4264 return err;
1da177e4
LT		 4265}
4266
4267static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4268{
19e03c57 4269 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4270 unsigned char fl_flags = request->fl_flags;
8e469ebd 4271 int status = -ENOLCK;
1da177e4 4272
8e469ebd
TM		 4273 if ((fl_flags & FL_POSIX) &&
4274 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4275 goto out;
6bfc93ef 4276 /* Is this a delegated open? */
6bfc93ef
TM		 4277 status = nfs4_set_lock_state(state, request);
4278 if (status != 0)
4279 goto out;
01c3b861
TM		 4280 request->fl_flags |= FL_ACCESS;
4281 status = do_vfs_lock(request->fl_file, request);
4282 if (status < 0)
4283 goto out;
19e03c57 4284 down_read(&nfsi->rwsem);
01c3b861 4285 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4286 /* Yes: cache locks! */
01c3b861 4287 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4288 request->fl_flags = fl_flags & ~FL_SLEEP;
4289 status = do_vfs_lock(request->fl_file, request);
4290 goto out_unlock;
01c3b861 4291 }
afe6c27c 4292 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4293 if (status != 0)
01c3b861 4294 goto out_unlock;
6bfc93ef 4295 /* Note: we always want to sleep here! */
01c3b861 4296 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4297 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4298 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4299out_unlock:
19e03c57 4300 up_read(&nfsi->rwsem);
01c3b861
TM		 4301out:
4302 request->fl_flags = fl_flags;
1da177e4
LT		 4303 return status;
4304}
4305
4306static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4307{
4308 struct nfs4_exception exception = { };
4309 int err;
4310
4311 do {
965b5d67
TM		 4312 err = _nfs4_proc_setlk(state, cmd, request);
4313 if (err == -NFS4ERR_DENIED)
4314 err = -EAGAIN;
1da177e4 4315 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4316 err, &exception);
1da177e4
LT		 4317 } while (exception.retry);
4318 return err;
4319}
4320
4321static int
4322nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4323{
4324 struct nfs_open_context *ctx;
4325 struct nfs4_state *state;
4326 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4327 int status;
4328
4329 /* verify open state */
cd3758e3 4330 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4331 state = ctx->state;
4332
4333 if (request->fl_start < 0 || request->fl_end < 0)
4334 return -EINVAL;
4335
d953126a
TM		 4336 if (IS_GETLK(cmd)) {
4337 if (state != NULL)
4338 return nfs4_proc_getlk(state, F_GETLK, request);
4339 return 0;
4340 }
1da177e4
LT		 4341
4342 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4343 return -EINVAL;
4344
d953126a
TM		 4345 if (request->fl_type == F_UNLCK) {
4346 if (state != NULL)
4347 return nfs4_proc_unlck(state, cmd, request);
4348 return 0;
4349 }
1da177e4 4350
d953126a
TM		 4351 if (state == NULL)
4352 return -ENOLCK;
1da177e4
LT		 4353 do {
4354 status = nfs4_proc_setlk(state, cmd, request);
4355 if ((status != -EAGAIN) || IS_SETLK(cmd))
4356 break;
4357 timeout = nfs4_set_lock_task_retry(timeout);
4358 status = -ERESTARTSYS;
4359 if (signalled())
4360 break;
4361 } while(status < 0);
1da177e4
LT		 4362 return status;
4363}
4364
888e694c
TM		 4365int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4366{
4367 struct nfs_server *server = NFS_SERVER(state->inode);
4368 struct nfs4_exception exception = { };
4369 int err;
4370
4371 err = nfs4_set_lock_state(state, fl);
4372 if (err != 0)
4373 goto out;
4374 do {
afe6c27c 4375 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4376 switch (err) {
4377 default:
4378 printk(KERN_ERR "%s: unhandled error %d.\n",
4379 __func__, err);
4380 case 0:
965b5d67 4381 case -ESTALE:
d5122201
TM		 4382 goto out;
4383 case -NFS4ERR_EXPIRED:
4384 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4385 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4386 case -NFS4ERR_BADSESSION:
4387 case -NFS4ERR_BADSLOT:
4388 case -NFS4ERR_BAD_HIGH_SLOT:
4389 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4390 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4391 nfs4_schedule_state_recovery(server->nfs_client);
4392 goto out;
965b5d67
TM		 4393 case -ERESTARTSYS:
4394 /*
4395 * The show must go on: exit, but mark the
4396 * stateid as needing recovery.
4397 */
4398 case -NFS4ERR_ADMIN_REVOKED:
4399 case -NFS4ERR_BAD_STATEID:
4400 case -NFS4ERR_OPENMODE:
4401 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4402 err = 0;
4403 goto out;
4404 case -ENOMEM:
4405 case -NFS4ERR_DENIED:
4406 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4407 err = 0;
4408 goto out;
d5122201 4409 case -NFS4ERR_DELAY:
2c643488 4410 case -EKEYEXPIRED:
d5122201
TM		 4411 break;
4412 }
888e694c
TM		 4413 err = nfs4_handle_exception(server, err, &exception);
4414 } while (exception.retry);
4415out:
4416 return err;
4417}
6b3b5496 4418
aa1870af
BF		 4419#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4420
6b3b5496
BF		 4421int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4422 size_t buflen, int flags)
4423{
4b580ee3
BF		 4424 struct inode *inode = dentry->d_inode;
4425
4426 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4427 return -EOPNOTSUPP;
4428
4b580ee3 4429 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4430}
4431
4432/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4433 * and that's what we'll do for e.g. user attributes that haven't been set.
4434 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4435 * attributes in kernel-managed attribute namespaces. */
4436ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4437 size_t buflen)
4438{
aa1870af
BF		 4439 struct inode *inode = dentry->d_inode;
4440
4441 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4442 return -EOPNOTSUPP;
4443
4444 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4445}
4446
4447ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4448{
aa1870af 4449 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4450
096455a2
BF		 4451 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4452 return 0;
6b3b5496
BF		 4453 if (buf && buflen < len)
4454 return -ERANGE;
4455 if (buf)
aa1870af
BF		 4456 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4457 return len;
6b3b5496
BF		 4458}
4459
69aaaae1
TM		 4460static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4461{
4462 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4463 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4464 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4465 return;
4466
4467 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4468 NFS_ATTR_FATTR_NLINK;
4469 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4470 fattr->nlink = 2;
4471}
4472
56659e99 4473int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4474 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4475{
4476 struct nfs_server *server = NFS_SERVER(dir);
4477 u32 bitmask[2] = {
361e624f
MN		 4478 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4479 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4480 };
4481 struct nfs4_fs_locations_arg args = {
4482 .dir_fh = NFS_FH(dir),
c228fd3a 4483 .name = name,
683b57b4
TM		 4484 .page = page,
4485 .bitmask = bitmask,
4486 };
22958463
BH		 4487 struct nfs4_fs_locations_res res = {
4488 .fs_locations = fs_locations,
4489 };
683b57b4
TM		 4490 struct rpc_message msg = {
4491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4492 .rpc_argp = &args,
22958463 4493 .rpc_resp = &res,
683b57b4
TM		 4494 };
4495 int status;
4496
3110ff80 4497 dprintk("%s: start\n", __func__);
c228fd3a 4498 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4499 fs_locations->server = server;
830b8e33 4500 fs_locations->nlocations = 0;
cccef3b9 4501 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4502 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4503 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4504 return status;
4505}
4506
557134a3 4507#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4508/*
4509 * nfs4_proc_exchange_id()
4510 *
4511 * Since the clientid has expired, all compounds using sessions
4512 * associated with the stale clientid will be returning
4513 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4514 * be in some phase of session reset.
4515 */
4d643d1d 4516int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4517{
4518 nfs4_verifier verifier;
4519 struct nfs41_exchange_id_args args = {
4520 .client = clp,
4521 .flags = clp->cl_exchange_flags,
4522 };
4523 struct nfs41_exchange_id_res res = {
4524 .client = clp,
4525 };
4526 int status;
4527 struct rpc_message msg = {
4528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4529 .rpc_argp = &args,
4530 .rpc_resp = &res,
4531 .rpc_cred = cred,
4532 };
4533 __be32 *p;
4534
4535 dprintk("--> %s\n", __func__);
4536 BUG_ON(clp == NULL);
a7b72103 4537
7b183d0d
AB		 4538 /* Remove server-only flags */
4539 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4540
99fe60d0
BH		 4541 p = (u32 *)verifier.data;
4542 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4543 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4544 args.verifier = &verifier;
4545
4546 while (1) {
4547 args.id_len = scnprintf(args.id, sizeof(args.id),
4548 "%s/%s %u",
4549 clp->cl_ipaddr,
4550 rpc_peeraddr2str(clp->cl_rpcclient,
4551 RPC_DISPLAY_ADDR),
4552 clp->cl_id_uniquifier);
4553
4554 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4555
180b62a3 4556 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4557 break;
4558
4559 if (signalled())
4560 break;
4561
4562 if (++clp->cl_id_uniquifier == 0)
4563 break;
4564 }
4565
4566 dprintk("<-- %s status= %d\n", __func__, status);
4567 return status;
4568}
4569
2050f0cc
AA		 4570struct nfs4_get_lease_time_data {
4571 struct nfs4_get_lease_time_args *args;
4572 struct nfs4_get_lease_time_res *res;
4573 struct nfs_client *clp;
4574};
4575
4576static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4577 void *calldata)
4578{
4579 int ret;
4580 struct nfs4_get_lease_time_data *data =
4581 (struct nfs4_get_lease_time_data *)calldata;
4582
4583 dprintk("--> %s\n", __func__);
689cf5c1 4584 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4585 /* just setup sequence, do not trigger session recovery
4586 since we're invoked within one */
4587 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4588 &data->args->la_seq_args,
4589 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4590
4591 BUG_ON(ret == -EAGAIN);
4592 rpc_call_start(task);
4593 dprintk("<-- %s\n", __func__);
4594}
4595
4596/*
4597 * Called from nfs4_state_manager thread for session setup, so don't recover
4598 * from sequence operation or clientid errors.
4599 */
4600static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4601{
4602 struct nfs4_get_lease_time_data *data =
4603 (struct nfs4_get_lease_time_data *)calldata;
4604
4605 dprintk("--> %s\n", __func__);
d185a334 4606 nfs41_sequence_done(&data->res->lr_seq_res);
2050f0cc
AA		 4607 switch (task->tk_status) {
4608 case -NFS4ERR_DELAY:
4609 case -NFS4ERR_GRACE:
2c643488 4610 case -EKEYEXPIRED:
2050f0cc
AA		 4611 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4612 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4613 task->tk_status = 0;
0110ee15 4614 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4615 return;
4616 }
2050f0cc
AA		 4617 dprintk("<-- %s\n", __func__);
4618}
4619
4620struct rpc_call_ops nfs4_get_lease_time_ops = {
4621 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4622 .rpc_call_done = nfs4_get_lease_time_done,
4623};
4624
4625int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4626{
4627 struct rpc_task *task;
4628 struct nfs4_get_lease_time_args args;
4629 struct nfs4_get_lease_time_res res = {
4630 .lr_fsinfo = fsinfo,
4631 };
4632 struct nfs4_get_lease_time_data data = {
4633 .args = &args,
4634 .res = &res,
4635 .clp = clp,
4636 };
4637 struct rpc_message msg = {
4638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4639 .rpc_argp = &args,
4640 .rpc_resp = &res,
4641 };
4642 struct rpc_task_setup task_setup = {
4643 .rpc_client = clp->cl_rpcclient,
4644 .rpc_message = &msg,
4645 .callback_ops = &nfs4_get_lease_time_ops,
4646 .callback_data = &data
4647 };
4648 int status;
4649
4650 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4651 dprintk("--> %s\n", __func__);
4652 task = rpc_run_task(&task_setup);
4653
4654 if (IS_ERR(task))
4655 status = PTR_ERR(task);
4656 else {
4657 status = task->tk_status;
4658 rpc_put_task(task);
4659 }
4660 dprintk("<-- %s return %d\n", __func__, status);
4661
4662 return status;
4663}
4664
b73dafa7
RL		 4665/*
4666 * Reset a slot table
4667 */
104aeba4
AA		 4668static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4669 int ivalue)
ac72b7b3 4670{
104aeba4 4671 struct nfs4_slot *new = NULL;
b73dafa7 4672 int i;
ac72b7b3
AA		 4673 int ret = 0;
4674
104aeba4
AA		 4675 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4676 max_reqs, tbl->max_slots);
ac72b7b3 4677
104aeba4
AA		 4678 /* Does the newly negotiated max_reqs match the existing slot table? */
4679 if (max_reqs != tbl->max_slots) {
4680 ret = -ENOMEM;
4681 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4682 GFP_NOFS);
104aeba4
AA		 4683 if (!new)
4684 goto out;
4685 ret = 0;
4686 kfree(tbl->slots);
ac72b7b3
AA		 4687 }
4688 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4689 if (new) {
4690 tbl->slots = new;
4691 tbl->max_slots = max_reqs;
4692 }
4693 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4694 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4695 spin_unlock(&tbl->slot_tbl_lock);
4696 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4697 tbl, tbl->slots, tbl->max_slots);
4698out:
4699 dprintk("<-- %s: return %d\n", __func__, ret);
4700 return ret;
4701}
4702
b73dafa7
RL		 4703/*
4704 * Reset the forechannel and backchannel slot tables
4705 */
4706static int nfs4_reset_slot_tables(struct nfs4_session *session)
4707{
4708 int status;
4709
4710 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4711 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4712 if (status)
4713 return status;
4714
4715 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4716 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4717 return status;
4718}
4719
f8625a6a
RL		 4720/* Destroy the slot table */
4721static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4722{
4723 if (session->fc_slot_table.slots != NULL) {
4724 kfree(session->fc_slot_table.slots);
4725 session->fc_slot_table.slots = NULL;
4726 }
4727 if (session->bc_slot_table.slots != NULL) {
4728 kfree(session->bc_slot_table.slots);
4729 session->bc_slot_table.slots = NULL;
4730 }
4731 return;
4732}
4733
fc931582
AA		 4734/*
4735 * Initialize slot table
4736 */
050047ce
RL		 4737static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4738 int max_slots, int ivalue)
fc931582 4739{
fc931582
AA		 4740 struct nfs4_slot *slot;
4741 int ret = -ENOMEM;
4742
4743 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4744
050047ce 4745 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4746
8535b2be 4747 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4748 if (!slot)
4749 goto out;
fc931582
AA		 4750 ret = 0;
4751
4752 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4753 tbl->max_slots = max_slots;
4754 tbl->slots = slot;
4755 tbl->highest_used_slotid = -1; /* no slot is currently used */
4756 spin_unlock(&tbl->slot_tbl_lock);
4757 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4758 tbl, tbl->slots, tbl->max_slots);
4759out:
4760 dprintk("<-- %s: return %d\n", __func__, ret);
4761 return ret;
fc931582
AA		 4762}
4763
050047ce
RL		 4764/*
4765 * Initialize the forechannel and backchannel tables
4766 */
4767static int nfs4_init_slot_tables(struct nfs4_session *session)
4768{
f26468fb
TM		 4769 struct nfs4_slot_table *tbl;
4770 int status = 0;
050047ce 4771
f26468fb
TM		 4772 tbl = &session->fc_slot_table;
4773 if (tbl->slots == NULL) {
4774 status = nfs4_init_slot_table(tbl,
4775 session->fc_attrs.max_reqs, 1);
4776 if (status)
4777 return status;
4778 }
050047ce 4779
f26468fb
TM		 4780 tbl = &session->bc_slot_table;
4781 if (tbl->slots == NULL) {
4782 status = nfs4_init_slot_table(tbl,
4783 session->bc_attrs.max_reqs, 0);
4784 if (status)
4785 nfs4_destroy_slot_tables(session);
4786 }
f8625a6a
RL		 4787
4788 return status;
557134a3
AA		 4789}
4790
4791struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4792{
4793 struct nfs4_session *session;
4794 struct nfs4_slot_table *tbl;
4795
8535b2be 4796 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4797 if (!session)
4798 return NULL;
76db6d95 4799
76db6d95
AA		 4800 /*
4801 * The create session reply races with the server back
4802 * channel probe. Mark the client NFS_CS_SESSION_INITING
4803 * so that the client back channel can find the
4804 * nfs_client struct
4805 */
4806 clp->cl_cons_state = NFS_CS_SESSION_INITING;
ea028ac9 4807 init_completion(&session->complete);
76db6d95 4808
557134a3 4809 tbl = &session->fc_slot_table;
9dfdf404 4810 tbl->highest_used_slotid = -1;
557134a3 4811 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4812 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4813
4814 tbl = &session->bc_slot_table;
9dfdf404 4815 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4816 spin_lock_init(&tbl->slot_tbl_lock);
4817 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4818
557134a3
AA		 4819 session->clp = clp;
4820 return session;
4821}
4822
4823void nfs4_destroy_session(struct nfs4_session *session)
4824{
5a0ffe54
AA		 4825 nfs4_proc_destroy_session(session);
4826 dprintk("%s Destroy backchannel for xprt %p\n",
4827 __func__, session->clp->cl_rpcclient->cl_xprt);
4828 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4829 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4830 nfs4_destroy_slot_tables(session);
557134a3
AA		 4831 kfree(session);
4832}
4833
fc931582
AA		 4834/*
4835 * Initialize the values to be used by the client in CREATE_SESSION
4836 * If nfs4_init_session set the fore channel request and response sizes,
4837 * use them.
4838 *
4839 * Set the back channel max_resp_sz_cached to zero to force the client to
4840 * always set csa_cachethis to FALSE because the current implementation
4841 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4842 */
4843static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4844{
4845 struct nfs4_session *session = args->client->cl_session;
4846 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4847 mxresp_sz = session->fc_attrs.max_resp_sz;
4848
4849 if (mxrqst_sz == 0)
4850 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4851 if (mxresp_sz == 0)
4852 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4853 /* Fore channel attributes */
4854 args->fc_attrs.headerpadsz = 0;
4855 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4856 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4857 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4858 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4859
4860 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4861 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4862 __func__,
4863 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4864 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4865
4866 /* Back channel attributes */
4867 args->bc_attrs.headerpadsz = 0;
4868 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4869 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4870 args->bc_attrs.max_resp_sz_cached = 0;
4871 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4872 args->bc_attrs.max_reqs = 1;
4873
4874 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4875 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4876 __func__,
4877 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4878 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4879 args->bc_attrs.max_reqs);
4880}
4881
8d35301d
AA		 4882static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4883{
4884 if (rcvd <= sent)
4885 return 0;
4886 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4887 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4888 return -EINVAL;
4889}
4890
4891#define _verify_fore_channel_attr(_name_) \
4892 _verify_channel_attr("fore", #_name_, \
4893 args->fc_attrs._name_, \
4894 session->fc_attrs._name_)
4895
4896#define _verify_back_channel_attr(_name_) \
4897 _verify_channel_attr("back", #_name_, \
4898 args->bc_attrs._name_, \
4899 session->bc_attrs._name_)
4900
4901/*
4902 * The server is not allowed to increase the fore channel header pad size,
4903 * maximum response size, or maximum number of operations.
4904 *
4905 * The back channel attributes are only negotiatied down: We send what the
4906 * (back channel) server insists upon.
4907 */
4908static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4909 struct nfs4_session *session)
4910{
4911 int ret = 0;
4912
4913 ret |= _verify_fore_channel_attr(headerpadsz);
4914 ret |= _verify_fore_channel_attr(max_resp_sz);
4915 ret |= _verify_fore_channel_attr(max_ops);
4916
4917 ret |= _verify_back_channel_attr(headerpadsz);
4918 ret |= _verify_back_channel_attr(max_rqst_sz);
4919 ret |= _verify_back_channel_attr(max_resp_sz);
4920 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4921 ret |= _verify_back_channel_attr(max_ops);
4922 ret |= _verify_back_channel_attr(max_reqs);
4923
4924 return ret;
4925}
4926
fc931582
AA		 4927static int _nfs4_proc_create_session(struct nfs_client *clp)
4928{
4929 struct nfs4_session *session = clp->cl_session;
4930 struct nfs41_create_session_args args = {
4931 .client = clp,
4932 .cb_program = NFS4_CALLBACK,
4933 };
4934 struct nfs41_create_session_res res = {
4935 .client = clp,
4936 };
4937 struct rpc_message msg = {
4938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4939 .rpc_argp = &args,
4940 .rpc_resp = &res,
4941 };
4942 int status;
4943
4944 nfs4_init_channel_attrs(&args);
0f91421e 4945 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4946
4947 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4948
8d35301d
AA		 4949 if (!status)
4950 /* Verify the session's negotiated channel_attrs values */
4951 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4952 if (!status) {
4953 /* Increment the clientid slot sequence id */
4954 clp->cl_seqid++;
4955 }
4956
4957 return status;
4958}
4959
4960/*
4961 * Issues a CREATE_SESSION operation to the server.
4962 * It is the responsibility of the caller to verify the session is
4963 * expired before calling this routine.
4964 */
f26468fb 4965int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4966{
4967 int status;
4968 unsigned *ptr;
fc931582
AA		 4969 struct nfs4_session *session = clp->cl_session;
4970
4971 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4972
4973 status = _nfs4_proc_create_session(clp);
4974 if (status)
4975 goto out;
4976
f26468fb
TM		 4977 /* Init and reset the fore channel */
4978 status = nfs4_init_slot_tables(session);
4979 dprintk("slot table initialization returned %d\n", status);
4980 if (status)
4981 goto out;
4982 status = nfs4_reset_slot_tables(session);
4983 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4984 if (status)
4985 goto out;
4986
4987 ptr = (unsigned *)&session->sess_id.data[0];
4988 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4989 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4990out:
4991 dprintk("<-- %s\n", __func__);
4992 return status;
4993}
4994
0f3e66c6
AA		 4995/*
4996 * Issue the over-the-wire RPC DESTROY_SESSION.
4997 * The caller must serialize access to this routine.
4998 */
4999int nfs4_proc_destroy_session(struct nfs4_session *session)
5000{
5001 int status = 0;
5002 struct rpc_message msg;
5003
5004 dprintk("--> nfs4_proc_destroy_session\n");
5005
5006 /* session is still being setup */
5007 if (session->clp->cl_cons_state != NFS_CS_READY)
5008 return status;
5009
5010 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5011 msg.rpc_argp = session;
5012 msg.rpc_resp = NULL;
5013 msg.rpc_cred = NULL;
5014 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5015
5016 if (status)
5017 printk(KERN_WARNING
5018 "Got error %d from the server on DESTROY_SESSION. "
5019 "Session has been destroyed regardless...\n", status);
5020
5021 dprintk("<-- nfs4_proc_destroy_session\n");
5022 return status;
5023}
5024
fccba804
TM		 5025int nfs4_init_session(struct nfs_server *server)
5026{
5027 struct nfs_client *clp = server->nfs_client;
2449ea2e 5028 struct nfs4_session *session;
68bf05ef 5029 unsigned int rsize, wsize;
fccba804
TM		 5030 int ret;
5031
5032 if (!nfs4_has_session(clp))
5033 return 0;
5034
68bf05ef
AA		 5035 rsize = server->rsize;
5036 if (rsize == 0)
5037 rsize = NFS_MAX_FILE_IO_SIZE;
5038 wsize = server->wsize;
5039 if (wsize == 0)
5040 wsize = NFS_MAX_FILE_IO_SIZE;
5041
2449ea2e 5042 session = clp->cl_session;
68bf05ef
AA		 5043 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5044 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5045
fccba804
TM		 5046 ret = nfs4_recover_expired_lease(server);
5047 if (!ret)
5048 ret = nfs4_check_client_ready(clp);
5049 return ret;
5050}
5051
fc01cea9
AA		 5052/*
5053 * Renew the cl_session lease.
5054 */
d5f8d3fe
TM		 5055struct nfs4_sequence_data {
5056 struct nfs_client *clp;
5057 struct nfs4_sequence_args args;
5058 struct nfs4_sequence_res res;
5059};
5060
dc96aef9
AB		 5061static void nfs41_sequence_release(void *data)
5062{
d5f8d3fe
TM		 5063 struct nfs4_sequence_data *calldata = data;
5064 struct nfs_client *clp = calldata->clp;
dc96aef9 5065
7135840f
AB		 5066 if (atomic_read(&clp->cl_count) > 1)
5067 nfs4_schedule_state_renewal(clp);
5068 nfs_put_client(clp);
d5f8d3fe 5069 kfree(calldata);
dc96aef9
AB		 5070}
5071
aa5190d0
TM		 5072static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5073{
5074 switch(task->tk_status) {
5075 case -NFS4ERR_DELAY:
5076 case -EKEYEXPIRED:
5077 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5078 return -EAGAIN;
5079 default:
5080 nfs4_schedule_state_recovery(clp);
5081 }
5082 return 0;
5083}
5084
dc96aef9 5085static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5086{
d5f8d3fe
TM		 5087 struct nfs4_sequence_data *calldata = data;
5088 struct nfs_client *clp = calldata->clp;
fc01cea9 5089
d185a334 5090 nfs41_sequence_done(task->tk_msg.rpc_resp);
fc01cea9
AA		 5091
5092 if (task->tk_status < 0) {
5093 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5094 if (atomic_read(&clp->cl_count) == 1)
5095 goto out;
fc01cea9 5096
aa5190d0
TM		 5097 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5098 rpc_restart_call_prepare(task);
fc01cea9
AA		 5099 return;
5100 }
5101 }
fc01cea9 5102 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5103out:
fc01cea9
AA		 5104 dprintk("<-- %s\n", __func__);
5105}
5106
5107static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5108{
d5f8d3fe
TM		 5109 struct nfs4_sequence_data *calldata = data;
5110 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5111 struct nfs4_sequence_args *args;
5112 struct nfs4_sequence_res *res;
5113
fc01cea9
AA		 5114 args = task->tk_msg.rpc_argp;
5115 res = task->tk_msg.rpc_resp;
5116
035168ab 5117 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5118 return;
5119 rpc_call_start(task);
5120}
5121
5122static const struct rpc_call_ops nfs41_sequence_ops = {
5123 .rpc_call_done = nfs41_sequence_call_done,
5124 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5125 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5126};
5127
71ac6da9 5128static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5129{
d5f8d3fe 5130 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5131 struct rpc_message msg = {
5132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5133 .rpc_cred = cred,
5134 };
71ac6da9
TM		 5135 struct rpc_task_setup task_setup_data = {
5136 .rpc_client = clp->cl_rpcclient,
5137 .rpc_message = &msg,
5138 .callback_ops = &nfs41_sequence_ops,
5139 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5140 };
fc01cea9 5141
7135840f 5142 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5143 return ERR_PTR(-EIO);
d5f8d3fe
TM		 5144 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5145 if (calldata == NULL) {
7135840f 5146 nfs_put_client(clp);
71ac6da9 5147 return ERR_PTR(-ENOMEM);
fc01cea9 5148 }
d5f8d3fe
TM		 5149 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5150 msg.rpc_argp = &calldata->args;
5151 msg.rpc_resp = &calldata->res;
5152 calldata->clp = clp;
71ac6da9 5153 task_setup_data.callback_data = calldata;
fc01cea9 5154
71ac6da9
TM		 5155 return rpc_run_task(&task_setup_data);
5156}
5157
5158static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5159{
5160 struct rpc_task *task;
5161 int ret = 0;
5162
5163 task = _nfs41_proc_sequence(clp, cred);
5164 if (IS_ERR(task))
5165 ret = PTR_ERR(task);
5166 else
5167 rpc_put_task(task);
5168 dprintk("<-- %s status=%d\n", __func__, ret);
5169 return ret;
5170}
5171
5172static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5173{
5174 struct rpc_task *task;
5175 int ret;
5176
5177 task = _nfs41_proc_sequence(clp, cred);
5178 if (IS_ERR(task)) {
5179 ret = PTR_ERR(task);
5180 goto out;
5181 }
5182 ret = rpc_wait_for_completion_task(task);
5183 if (!ret)
5184 ret = task->tk_status;
5185 rpc_put_task(task);
5186out:
5187 dprintk("<-- %s status=%d\n", __func__, ret);
5188 return ret;
fc01cea9
AA		 5189}
5190
fce5c838
RL		 5191struct nfs4_reclaim_complete_data {
5192 struct nfs_client *clp;
5193 struct nfs41_reclaim_complete_args arg;
5194 struct nfs41_reclaim_complete_res res;
5195};
5196
5197static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5198{
5199 struct nfs4_reclaim_complete_data *calldata = data;
5200
b257957e 5201 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5202 if (nfs41_setup_sequence(calldata->clp->cl_session,
5203 &calldata->arg.seq_args,
fce5c838
RL		 5204 &calldata->res.seq_res, 0, task))
5205 return;
5206
5207 rpc_call_start(task);
5208}
5209
aa5190d0
TM		 5210static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5211{
5212 switch(task->tk_status) {
5213 case 0:
5214 case -NFS4ERR_COMPLETE_ALREADY:
5215 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5216 break;
5217 case -NFS4ERR_DELAY:
5218 case -EKEYEXPIRED:
5219 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5220 return -EAGAIN;
5221 default:
5222 nfs4_schedule_state_recovery(clp);
5223 }
5224 return 0;
5225}
5226
fce5c838
RL		 5227static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5228{
5229 struct nfs4_reclaim_complete_data *calldata = data;
5230 struct nfs_client *clp = calldata->clp;
5231 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5232
5233 dprintk("--> %s\n", __func__);
d185a334 5234 nfs41_sequence_done(res);
fce5c838 5235
aa5190d0
TM		 5236 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5237 rpc_restart_call_prepare(task);
5238 return;
5239 }
fce5c838
RL		 5240 dprintk("<-- %s\n", __func__);
5241}
5242
5243static void nfs4_free_reclaim_complete_data(void *data)
5244{
5245 struct nfs4_reclaim_complete_data *calldata = data;
5246
5247 kfree(calldata);
5248}
5249
5250static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5251 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5252 .rpc_call_done = nfs4_reclaim_complete_done,
5253 .rpc_release = nfs4_free_reclaim_complete_data,
5254};
5255
5256/*
5257 * Issue a global reclaim complete.
5258 */
5259static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5260{
5261 struct nfs4_reclaim_complete_data *calldata;
5262 struct rpc_task *task;
5263 struct rpc_message msg = {
5264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5265 };
5266 struct rpc_task_setup task_setup_data = {
5267 .rpc_client = clp->cl_rpcclient,
5268 .rpc_message = &msg,
5269 .callback_ops = &nfs4_reclaim_complete_call_ops,
5270 .flags = RPC_TASK_ASYNC,
5271 };
5272 int status = -ENOMEM;
5273
5274 dprintk("--> %s\n", __func__);
8535b2be 5275 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5276 if (calldata == NULL)
5277 goto out;
5278 calldata->clp = clp;
5279 calldata->arg.one_fs = 0;
5280 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5281
5282 msg.rpc_argp = &calldata->arg;
5283 msg.rpc_resp = &calldata->res;
5284 task_setup_data.callback_data = calldata;
5285 task = rpc_run_task(&task_setup_data);
acf82b85 5286 if (IS_ERR(task)) {
fce5c838 5287 status = PTR_ERR(task);
acf82b85
DC		 5288 goto out;
5289 }
fce5c838 5290 rpc_put_task(task);
acf82b85 5291 return 0;
fce5c838
RL		 5292out:
5293 dprintk("<-- %s status=%d\n", __func__, status);
5294 return status;
5295}
557134a3
AA		 5296#endif /* CONFIG_NFS_V4_1 */
5297
591d71cb 5298struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5299 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5300 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5301 .recover_open = nfs4_open_reclaim,
5302 .recover_lock = nfs4_lock_reclaim,
591d71cb 5303 .establish_clid = nfs4_init_clientid,
90a16617 5304 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5305};
5306
591d71cb
AA		 5307#if defined(CONFIG_NFS_V4_1)
5308struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5309 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5310 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5311 .recover_open = nfs4_open_reclaim,
5312 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5313 .establish_clid = nfs41_init_clientid,
b4b82607 5314 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5315 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5316};
5317#endif /* CONFIG_NFS_V4_1 */
5318
5319struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5320 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5321 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5322 .recover_open = nfs4_open_expired,
5323 .recover_lock = nfs4_lock_expired,
5324 .establish_clid = nfs4_init_clientid,
90a16617 5325 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5326};
5327
5328#if defined(CONFIG_NFS_V4_1)
5329struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5330 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5331 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5332 .recover_open = nfs4_open_expired,
5333 .recover_lock = nfs4_lock_expired,
4d643d1d 5334 .establish_clid = nfs41_init_clientid,
b4b82607 5335 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5336};
591d71cb 5337#endif /* CONFIG_NFS_V4_1 */
1da177e4 5338
29fba38b
BH		 5339struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5340 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5341 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5342 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5343};
5344
5345#if defined(CONFIG_NFS_V4_1)
5346struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5347 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5348 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5349 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5350};
5351#endif
5352
5353/*
5354 * Per minor version reboot and network partition recovery ops
5355 */
5356
591d71cb
AA		 5357struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5358 &nfs40_reboot_recovery_ops,
5359#if defined(CONFIG_NFS_V4_1)
5360 &nfs41_reboot_recovery_ops,
5361#endif
5362};
5363
5364struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5365 &nfs40_nograce_recovery_ops,
5366#if defined(CONFIG_NFS_V4_1)
5367 &nfs41_nograce_recovery_ops,
5368#endif
5369};
5370
29fba38b
BH		 5371struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5372 &nfs40_state_renewal_ops,
5373#if defined(CONFIG_NFS_V4_1)
5374 &nfs41_state_renewal_ops,
5375#endif
5376};
5377
92e1d5be 5378static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5379 .permission = nfs_permission,
5380 .getattr = nfs_getattr,
5381 .setattr = nfs_setattr,
5382 .getxattr = nfs4_getxattr,
5383 .setxattr = nfs4_setxattr,
5384 .listxattr = nfs4_listxattr,
5385};
5386
509de811 5387const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5388 .version = 4, /* protocol version */
5389 .dentry_ops = &nfs4_dentry_operations,
5390 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5391 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5392 .getroot = nfs4_proc_get_root,
5393 .getattr = nfs4_proc_getattr,
5394 .setattr = nfs4_proc_setattr,
2b3de441 5395 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5396 .lookup = nfs4_proc_lookup,
5397 .access = nfs4_proc_access,
5398 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5399 .create = nfs4_proc_create,
5400 .remove = nfs4_proc_remove,
5401 .unlink_setup = nfs4_proc_unlink_setup,
5402 .unlink_done = nfs4_proc_unlink_done,
5403 .rename = nfs4_proc_rename,
5404 .link = nfs4_proc_link,
5405 .symlink = nfs4_proc_symlink,
5406 .mkdir = nfs4_proc_mkdir,
5407 .rmdir = nfs4_proc_remove,
5408 .readdir = nfs4_proc_readdir,
5409 .mknod = nfs4_proc_mknod,
5410 .statfs = nfs4_proc_statfs,
5411 .fsinfo = nfs4_proc_fsinfo,
5412 .pathconf = nfs4_proc_pathconf,
e9326dca 5413 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5414 .decode_dirent = nfs4_decode_dirent,
5415 .read_setup = nfs4_proc_read_setup,
ec06c096 5416 .read_done = nfs4_read_done,
1da177e4 5417 .write_setup = nfs4_proc_write_setup,
788e7a89 5418 .write_done = nfs4_write_done,
1da177e4 5419 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5420 .commit_done = nfs4_commit_done,
1da177e4 5421 .lock = nfs4_proc_lock,
e50a1c2e 5422 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5423 .close_context = nfs4_close_context,
1da177e4
LT		 5424};
5425
5426/*
5427 * Local variables:
5428 * c-basic-offset: 8
5429 * End:
5430 */
Linux 6.x block layer and io_uring tree(s)