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NFS: use ERR_CAST()
[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"
b1f69b75 58#include "pnfs.h"
1da177e4
LT		 59
60#define NFSDBG_FACILITY NFSDBG_PROC
61
2066fe89 62#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 63#define NFS4_POLL_RETRY_MAX (15*HZ)
64
a78cb57a
TM		 65#define NFS4_MAX_LOOP_ON_RECOVER (10)
66
cdd4e68b 67struct nfs4_opendata;
864472e9 68static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 69static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 70static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 71static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 72static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
73static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 74static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
75 struct nfs_fattr *fattr, struct iattr *sattr,
76 struct nfs4_state *state);
1da177e4 77
1da177e4 78/* Prevent leaks of NFSv4 errors into userland */
46f72f57 79static int nfs4_map_errors(int err)
1da177e4 80{
52567b03
TM		 81 if (err >= -1000)
82 return err;
83 switch (err) {
84 case -NFS4ERR_RESOURCE:
85 return -EREMOTEIO;
86 default:
1da177e4 87 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 88 __func__, -err);
52567b03 89 break;
1da177e4 90 }
52567b03 91 return -EIO;
1da177e4
LT		 92}
93
94/*
95 * This is our standard bitmap for GETATTR requests.
96 */
97const u32 nfs4_fattr_bitmap[2] = {
98 FATTR4_WORD0_TYPE
99 | FATTR4_WORD0_CHANGE
100 | FATTR4_WORD0_SIZE
101 | FATTR4_WORD0_FSID
102 | FATTR4_WORD0_FILEID,
103 FATTR4_WORD1_MODE
104 | FATTR4_WORD1_NUMLINKS
105 | FATTR4_WORD1_OWNER
106 | FATTR4_WORD1_OWNER_GROUP
107 | FATTR4_WORD1_RAWDEV
108 | FATTR4_WORD1_SPACE_USED
109 | FATTR4_WORD1_TIME_ACCESS
110 | FATTR4_WORD1_TIME_METADATA
111 | FATTR4_WORD1_TIME_MODIFY
112};
113
114const u32 nfs4_statfs_bitmap[2] = {
115 FATTR4_WORD0_FILES_AVAIL
116 | FATTR4_WORD0_FILES_FREE
117 | FATTR4_WORD0_FILES_TOTAL,
118 FATTR4_WORD1_SPACE_AVAIL
119 | FATTR4_WORD1_SPACE_FREE
120 | FATTR4_WORD1_SPACE_TOTAL
121};
122
4ce79717 123const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 124 FATTR4_WORD0_MAXLINK
125 | FATTR4_WORD0_MAXNAME,
126 0
127};
128
129const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
130 | FATTR4_WORD0_MAXREAD
131 | FATTR4_WORD0_MAXWRITE
132 | FATTR4_WORD0_LEASE_TIME,
55b6e774 133 FATTR4_WORD1_TIME_DELTA
504913fb 134 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 135};
136
830b8e33
MN		 137const u32 nfs4_fs_locations_bitmap[2] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID
143 | FATTR4_WORD0_FS_LOCATIONS,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY
153 | FATTR4_WORD1_MOUNTED_ON_FILEID
154};
155
bc4785cd 156static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 157 struct nfs4_readdir_arg *readdir)
158{
0dbb4c67 159 __be32 *start, *p;
1da177e4
LT		 160
161 BUG_ON(readdir->count < 80);
162 if (cookie > 2) {
b7ef1956 163 readdir->cookie = cookie;
1da177e4
LT		 164 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
165 return;
166 }
167
168 readdir->cookie = 0;
169 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
170 if (cookie == 2)
171 return;
172
173 /*
174 * NFSv4 servers do not return entries for '.' and '..'
175 * Therefore, we fake these entries here. We let '.'
176 * have cookie 0 and '..' have cookie 1. Note that
177 * when talking to the server, we always send cookie 0
178 * instead of 1 or 2.
179 */
0dbb4c67 180 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 181
182 if (cookie == 0) {
183 *p++ = xdr_one; /* next */
184 *p++ = xdr_zero; /* cookie, first word */
185 *p++ = xdr_one; /* cookie, second word */
186 *p++ = xdr_one; /* entry len */
187 memcpy(p, ".\0\0\0", 4); /* entry */
188 p++;
189 *p++ = xdr_one; /* bitmap length */
190 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
191 *p++ = htonl(8); /* attribute buffer length */
4e769b93 192 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 193 }
194
195 *p++ = xdr_one; /* next */
196 *p++ = xdr_zero; /* cookie, first word */
197 *p++ = xdr_two; /* cookie, second word */
198 *p++ = xdr_two; /* entry len */
199 memcpy(p, "..\0\0", 4); /* entry */
200 p++;
201 *p++ = xdr_one; /* bitmap length */
202 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
203 *p++ = htonl(8); /* attribute buffer length */
4e769b93 204 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 205
206 readdir->pgbase = (char *)p - (char *)start;
207 readdir->count -= readdir->pgbase;
208 kunmap_atomic(start, KM_USER0);
209}
210
65de872e
TM		 211static int nfs4_wait_clnt_recover(struct nfs_client *clp)
212{
213 int res;
214
215 might_sleep();
216
e005e804 217 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 218 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 219 return res;
220}
221
222static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
223{
224 int res = 0;
225
226 might_sleep();
227
228 if (*timeout <= 0)
229 *timeout = NFS4_POLL_RETRY_MIN;
230 if (*timeout > NFS4_POLL_RETRY_MAX)
231 *timeout = NFS4_POLL_RETRY_MAX;
232 schedule_timeout_killable(*timeout);
233 if (fatal_signal_pending(current))
234 res = -ERESTARTSYS;
235 *timeout <<= 1;
236 return res;
237}
238
239/* This is the error handling routine for processes that are allowed
240 * to sleep.
241 */
242static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
243{
244 struct nfs_client *clp = server->nfs_client;
9e33bed5 245 struct nfs4_state *state = exception->state;
65de872e
TM		 246 int ret = errorcode;
247
248 exception->retry = 0;
249 switch(errorcode) {
250 case 0:
251 return 0;
9e33bed5
TM		 252 case -NFS4ERR_ADMIN_REVOKED:
253 case -NFS4ERR_BAD_STATEID:
254 case -NFS4ERR_OPENMODE:
255 if (state == NULL)
256 break;
257 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 258 goto do_state_recovery;
65de872e 259 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 260 case -NFS4ERR_STALE_CLIENTID:
65de872e 261 case -NFS4ERR_EXPIRED:
a2c0b9e2 262 goto do_state_recovery;
03391693 263#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
0b9e2d41 273 nfs4_schedule_state_recovery(clp);
4745e315 274 exception->retry = 1;
b9179237 275 break;
03391693 276#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 277 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
65de872e
TM		 285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
2c643488 287 case -EKEYEXPIRED:
65de872e
TM		 288 ret = nfs4_delay(server->client, &exception->timeout);
289 if (ret != 0)
290 break;
291 case -NFS4ERR_OLD_STATEID:
292 exception->retry = 1;
293 }
294 /* We failed to handle the error */
295 return nfs4_map_errors(ret);
a2c0b9e2
TM		 296do_state_recovery:
297 nfs4_schedule_state_recovery(clp);
298 ret = nfs4_wait_clnt_recover(clp);
299 if (ret == 0)
300 exception->retry = 1;
301 return ret;
65de872e
TM		 302}
303
304
452e9352 305static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 306{
1da177e4
LT		 307 spin_lock(&clp->cl_lock);
308 if (time_before(clp->cl_last_renewal,timestamp))
309 clp->cl_last_renewal = timestamp;
310 spin_unlock(&clp->cl_lock);
311}
312
452e9352
TM		 313static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
314{
315 do_renew_lease(server->nfs_client, timestamp);
316}
317
cccef3b9
AA		 318#if defined(CONFIG_NFS_V4_1)
319
e2c4ab3c
AA		 320/*
321 * nfs4_free_slot - free a slot and efficiently update slot table.
322 *
323 * freeing a slot is trivially done by clearing its respective bit
324 * in the bitmap.
325 * If the freed slotid equals highest_used_slotid we want to update it
326 * so that the server would be able to size down the slot table if needed,
327 * otherwise we know that the highest_used_slotid is still in use.
328 * When updating highest_used_slotid there may be "holes" in the bitmap
329 * so we need to scan down from highest_used_slotid to 0 looking for the now
330 * highest slotid in use.
331 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 332 *
333 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 334 */
335static void
dfb4f309 336nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 337{
dfb4f309 338 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 339 int slotid = free_slotid;
340
dfb4f309 341 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 342 /* clear used bit in bitmap */
343 __clear_bit(slotid, tbl->used_slots);
344
345 /* update highest_used_slotid when it is freed */
346 if (slotid == tbl->highest_used_slotid) {
347 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 348 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 349 tbl->highest_used_slotid = slotid;
350 else
351 tbl->highest_used_slotid = -1;
352 }
e2c4ab3c
AA		 353 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
354 free_slotid, tbl->highest_used_slotid);
355}
356
3bfb0fc5
AB		 357/*
358 * Signal state manager thread if session is drained
359 */
360static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
361{
689cf5c1
AB		 362 struct rpc_task *task;
363
a2118c33 364 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 365 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
366 if (task)
367 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 368 return;
369 }
370
371 if (ses->fc_slot_table.highest_used_slotid != -1)
372 return;
373
374 dprintk("%s COMPLETE: Session Drained\n", __func__);
375 complete(&ses->complete);
376}
377
d185a334 378static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 379{
380 struct nfs4_slot_table *tbl;
381
d185a334 382 tbl = &res->sr_session->fc_slot_table;
dfb4f309 383 if (!res->sr_slot) {
13615871
AA		 384 /* just wake up the next guy waiting since
385 * we may have not consumed a slot after all */
691daf3b 386 dprintk("%s: No slot\n", __func__);
35dc1d74 387 return;
13615871 388 }
ea028ac9 389
35dc1d74 390 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 391 nfs4_free_slot(tbl, res->sr_slot);
d185a334 392 nfs41_check_drain_session_complete(res->sr_session);
35dc1d74 393 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 394 res->sr_slot = NULL;
13615871
AA		 395}
396
14516c3a 397static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 398{
399 unsigned long timestamp;
14516c3a 400 struct nfs_client *clp;
b0df806c
AA		 401
402 /*
403 * sr_status remains 1 if an RPC level error occurred. The server
404 * may or may not have processed the sequence operation..
405 * Proceed as if the server received and processed the sequence
406 * operation.
407 */
408 if (res->sr_status == 1)
409 res->sr_status = NFS_OK;
410
411 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 412 if (!res->sr_slot)
b0df806c
AA		 413 goto out;
414
691daf3b 415 /* Check the SEQUENCE operation status */
14516c3a
TM		 416 switch (res->sr_status) {
417 case 0:
b0df806c 418 /* Update the slot's sequence and clientid lease timer */
dfb4f309 419 ++res->sr_slot->seq_nr;
b0df806c 420 timestamp = res->sr_renewal_time;
14516c3a 421 clp = res->sr_session->clp;
452e9352 422 do_renew_lease(clp, timestamp);
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);
14516c3a
TM		 426 break;
427 case -NFS4ERR_DELAY:
428 /* The server detected a resend of the RPC call and
429 * returned NFS4ERR_DELAY as per Section 2.10.6.2
430 * of RFC5661.
431 */
12364a4f 432 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 433 __func__,
434 res->sr_slot - res->sr_session->fc_slot_table.slots,
435 res->sr_slot->seq_nr);
14516c3a
TM		 436 goto out_retry;
437 default:
438 /* Just update the slot sequence no. */
dfb4f309 439 ++res->sr_slot->seq_nr;
b0df806c
AA		 440 }
441out:
442 /* The session may be reset by one of the error handlers. */
443 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 444 nfs41_sequence_free_slot(res);
14516c3a
TM		 445 return 1;
446out_retry:
d05dd4e9 447 if (!rpc_restart_call(task))
14516c3a
TM		 448 goto out;
449 rpc_delay(task, NFS4_POLL_RETRY_MAX);
450 return 0;
b0df806c
AA		 451}
452
14516c3a
TM		 453static int nfs4_sequence_done(struct rpc_task *task,
454 struct nfs4_sequence_res *res)
df896455 455{
14516c3a
TM		 456 if (res->sr_session == NULL)
457 return 1;
458 return nfs41_sequence_done(task, res);
df896455
TM		 459}
460
510b8175
BH		 461/*
462 * nfs4_find_slot - efficiently look for a free slot
463 *
464 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
465 * If found, we mark the slot as used, update the highest_used_slotid,
466 * and respectively set up the sequence operation args.
467 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 468 *
469 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 470 */
471static u8
40ead580 472nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 473{
474 int slotid;
475 u8 ret_id = NFS4_MAX_SLOT_TABLE;
476 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
477
510b8175
BH		 478 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
479 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
480 tbl->max_slots);
481 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
482 if (slotid >= tbl->max_slots)
483 goto out;
484 __set_bit(slotid, tbl->used_slots);
485 if (slotid > tbl->highest_used_slotid)
486 tbl->highest_used_slotid = slotid;
487 ret_id = slotid;
488out:
489 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
490 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 491 return ret_id;
492}
493
ce5039c1
AA		 494static int nfs41_setup_sequence(struct nfs4_session *session,
495 struct nfs4_sequence_args *args,
496 struct nfs4_sequence_res *res,
497 int cache_reply,
498 struct rpc_task *task)
499{
fbcd4abc
AA		 500 struct nfs4_slot *slot;
501 struct nfs4_slot_table *tbl;
502 u8 slotid;
503
504 dprintk("--> %s\n", __func__);
ce5039c1 505 /* slot already allocated? */
dfb4f309 506 if (res->sr_slot != NULL)
ce5039c1
AA		 507 return 0;
508
fbcd4abc
AA		 509 tbl = &session->fc_slot_table;
510
511 spin_lock(&tbl->slot_tbl_lock);
a2118c33 512 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 513 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 514 /*
515 * The state manager will wait until the slot table is empty.
516 * Schedule the reset thread
517 */
05f0d236 518 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 519 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 520 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 521 return -EAGAIN;
b069d94a
AA		 522 }
523
689cf5c1
AB		 524 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
525 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
526 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
527 spin_unlock(&tbl->slot_tbl_lock);
528 dprintk("%s enforce FIFO order\n", __func__);
529 return -EAGAIN;
530 }
531
40ead580 532 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 533 if (slotid == NFS4_MAX_SLOT_TABLE) {
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 dprintk("<-- %s: no free slots\n", __func__);
537 return -EAGAIN;
538 }
539 spin_unlock(&tbl->slot_tbl_lock);
540
689cf5c1 541 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 542 slot = tbl->slots + slotid;
99fe60d0 543 args->sa_session = session;
fbcd4abc
AA		 544 args->sa_slotid = slotid;
545 args->sa_cache_this = cache_reply;
546
547 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
548
99fe60d0 549 res->sr_session = session;
dfb4f309 550 res->sr_slot = slot;
fbcd4abc 551 res->sr_renewal_time = jiffies;
2a6e26cd 552 res->sr_status_flags = 0;
fbcd4abc
AA		 553 /*
554 * sr_status is only set in decode_sequence, and so will remain
555 * set to 1 if an rpc level failure occurs.
556 */
557 res->sr_status = 1;
ce5039c1
AA		 558 return 0;
559}
560
035168ab 561int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 562 struct nfs4_sequence_args *args,
563 struct nfs4_sequence_res *res,
564 int cache_reply,
565 struct rpc_task *task)
566{
035168ab 567 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 568 int ret = 0;
569
035168ab
TM		 570 if (session == NULL) {
571 args->sa_session = NULL;
572 res->sr_session = NULL;
573 goto out;
574 }
575
12364a4f 576 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 577 __func__, session->clp, session, res->sr_slot ?
578 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 579
035168ab 580 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 581 task);
ce5039c1
AA		 582out:
583 dprintk("<-- %s status=%d\n", __func__, ret);
584 return ret;
585}
586
587struct nfs41_call_sync_data {
035168ab 588 const struct nfs_server *seq_server;
ce5039c1
AA		 589 struct nfs4_sequence_args *seq_args;
590 struct nfs4_sequence_res *seq_res;
591 int cache_reply;
592};
593
594static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
595{
596 struct nfs41_call_sync_data *data = calldata;
597
035168ab
TM		 598 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
599
600 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 601 data->seq_res, data->cache_reply, task))
602 return;
603 rpc_call_start(task);
604}
605
b257957e
AB		 606static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
607{
608 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
609 nfs41_call_sync_prepare(task, calldata);
610}
611
69ab40c4
AA		 612static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
613{
614 struct nfs41_call_sync_data *data = calldata;
615
14516c3a 616 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 617}
618
ce5039c1
AA		 619struct rpc_call_ops nfs41_call_sync_ops = {
620 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 621 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 622};
623
b257957e
AB		 624struct rpc_call_ops nfs41_call_priv_sync_ops = {
625 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
626 .rpc_call_done = nfs41_call_sync_done,
627};
628
035168ab 629static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 630 struct rpc_message *msg,
631 struct nfs4_sequence_args *args,
632 struct nfs4_sequence_res *res,
b257957e
AB		 633 int cache_reply,
634 int privileged)
ce5039c1
AA		 635{
636 int ret;
637 struct rpc_task *task;
638 struct nfs41_call_sync_data data = {
035168ab 639 .seq_server = server,
ce5039c1
AA		 640 .seq_args = args,
641 .seq_res = res,
642 .cache_reply = cache_reply,
643 };
644 struct rpc_task_setup task_setup = {
035168ab 645 .rpc_client = server->client,
ce5039c1
AA		 646 .rpc_message = msg,
647 .callback_ops = &nfs41_call_sync_ops,
648 .callback_data = &data
649 };
650
dfb4f309 651 res->sr_slot = NULL;
b257957e
AB		 652 if (privileged)
653 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 654 task = rpc_run_task(&task_setup);
655 if (IS_ERR(task))
656 ret = PTR_ERR(task);
657 else {
658 ret = task->tk_status;
659 rpc_put_task(task);
660 }
661 return ret;
662}
663
cccef3b9
AA		 664int _nfs4_call_sync_session(struct nfs_server *server,
665 struct rpc_message *msg,
666 struct nfs4_sequence_args *args,
667 struct nfs4_sequence_res *res,
668 int cache_reply)
669{
035168ab 670 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 671}
672
df896455 673#else
14516c3a
TM		 674static int nfs4_sequence_done(struct rpc_task *task,
675 struct nfs4_sequence_res *res)
df896455 676{
14516c3a 677 return 1;
df896455 678}
cccef3b9
AA		 679#endif /* CONFIG_NFS_V4_1 */
680
681int _nfs4_call_sync(struct nfs_server *server,
682 struct rpc_message *msg,
683 struct nfs4_sequence_args *args,
684 struct nfs4_sequence_res *res,
685 int cache_reply)
686{
f3752975 687 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 688 return rpc_call_sync(server->client, msg, 0);
689}
690
691#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 692 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 693 &(res)->seq_res, (cache_reply))
694
38478b24 695static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 696{
38478b24 697 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 698
38478b24 699 spin_lock(&dir->i_lock);
40d24704
TM		 700 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
701 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 702 nfs_force_lookup_revalidate(dir);
40d24704 703 nfsi->change_attr = cinfo->after;
38478b24 704 spin_unlock(&dir->i_lock);
1da177e4
LT		 705}
706
e56e0b78 707struct nfs4_opendata {
c6d00e63 708 struct kref kref;
e56e0b78
TM		 709 struct nfs_openargs o_arg;
710 struct nfs_openres o_res;
cdd4e68b
TM		 711 struct nfs_open_confirmargs c_arg;
712 struct nfs_open_confirmres c_res;
e56e0b78
TM		 713 struct nfs_fattr f_attr;
714 struct nfs_fattr dir_attr;
ad389da7 715 struct path path;
e56e0b78
TM		 716 struct dentry *dir;
717 struct nfs4_state_owner *owner;
aac00a8d 718 struct nfs4_state *state;
e56e0b78 719 struct iattr attrs;
26e976a8 720 unsigned long timestamp;
3e309914 721 unsigned int rpc_done : 1;
24ac23ab
TM		 722 int rpc_status;
723 int cancelled;
e56e0b78
TM		 724};
725
2ced46c2
TM		 726
727static void nfs4_init_opendata_res(struct nfs4_opendata *p)
728{
729 p->o_res.f_attr = &p->f_attr;
730 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 731 p->o_res.seqid = p->o_arg.seqid;
732 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 733 p->o_res.server = p->o_arg.server;
734 nfs_fattr_init(&p->f_attr);
735 nfs_fattr_init(&p->dir_attr);
736}
737
ad389da7 738static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 739 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 740 const struct iattr *attrs,
741 gfp_t gfp_mask)
e56e0b78 742{
ad389da7 743 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 744 struct inode *dir = parent->d_inode;
745 struct nfs_server *server = NFS_SERVER(dir);
746 struct nfs4_opendata *p;
747
8535b2be 748 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 749 if (p == NULL)
750 goto err;
8535b2be 751 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 752 if (p->o_arg.seqid == NULL)
753 goto err_free;
f6948697
AV		 754 path_get(path);
755 p->path = *path;
e56e0b78
TM		 756 p->dir = parent;
757 p->owner = sp;
758 atomic_inc(&sp->so_count);
759 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 760 p->o_arg.open_flags = flags;
761 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 762 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 763 p->o_arg.id = sp->so_owner_id.id;
ad389da7 764 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 765 p->o_arg.server = server;
766 p->o_arg.bitmask = server->attr_bitmask;
767 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 768 if (flags & O_CREAT) {
769 u32 *s;
770
e56e0b78
TM		 771 p->o_arg.u.attrs = &p->attrs;
772 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 773 s = (u32 *) p->o_arg.u.verifier.data;
774 s[0] = jiffies;
775 s[1] = current->pid;
e56e0b78 776 }
cdd4e68b
TM		 777 p->c_arg.fh = &p->o_res.fh;
778 p->c_arg.stateid = &p->o_res.stateid;
779 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 780 nfs4_init_opendata_res(p);
c6d00e63 781 kref_init(&p->kref);
e56e0b78
TM		 782 return p;
783err_free:
784 kfree(p);
785err:
786 dput(parent);
787 return NULL;
788}
789
c6d00e63 790static void nfs4_opendata_free(struct kref *kref)
e56e0b78 791{
c6d00e63
TM		 792 struct nfs4_opendata *p = container_of(kref,
793 struct nfs4_opendata, kref);
794
795 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 796 if (p->state != NULL)
797 nfs4_put_open_state(p->state);
c6d00e63
TM		 798 nfs4_put_state_owner(p->owner);
799 dput(p->dir);
31f31db1 800 path_put(&p->path);
c6d00e63
TM		 801 kfree(p);
802}
803
804static void nfs4_opendata_put(struct nfs4_opendata *p)
805{
806 if (p != NULL)
807 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 808}
809
06f814a3
TM		 810static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
811{
06f814a3
TM		 812 int ret;
813
06f814a3 814 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 815 return ret;
816}
817
dc0b027d 818static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 819{
820 int ret = 0;
dc0b027d
TM		 821
822 if (open_mode & O_EXCL)
823 goto out;
824 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 825 case FMODE_READ:
88069f77
TM		 826 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
827 && state->n_rdonly != 0;
6ee41268
TM		 828 break;
829 case FMODE_WRITE:
88069f77
TM		 830 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
831 && state->n_wronly != 0;
6ee41268
TM		 832 break;
833 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 834 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
835 && state->n_rdwr != 0;
6ee41268 836 }
dc0b027d 837out:
6ee41268
TM		 838 return ret;
839}
840
dc0b027d 841static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 842{
dc0b027d 843 if ((delegation->type & fmode) != fmode)
aac00a8d 844 return 0;
15c831bf 845 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 846 return 0;
b7391f44 847 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 848 return 1;
849}
850
dc0b027d 851static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 852{
dc0b027d 853 switch (fmode) {
e7616923
TM		 854 case FMODE_WRITE:
855 state->n_wronly++;
856 break;
857 case FMODE_READ:
858 state->n_rdonly++;
859 break;
860 case FMODE_READ|FMODE_WRITE:
861 state->n_rdwr++;
862 }
dc0b027d 863 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 864}
865
dc0b027d 866static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 867{
868 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
869 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
870 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 871 switch (fmode) {
003707c7
TM		 872 case FMODE_READ:
873 set_bit(NFS_O_RDONLY_STATE, &state->flags);
874 break;
875 case FMODE_WRITE:
876 set_bit(NFS_O_WRONLY_STATE, &state->flags);
877 break;
878 case FMODE_READ|FMODE_WRITE:
879 set_bit(NFS_O_RDWR_STATE, &state->flags);
880 }
e7616923
TM		 881}
882
dc0b027d 883static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 884{
8bda4e4c 885 write_seqlock(&state->seqlock);
dc0b027d 886 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 887 write_sequnlock(&state->seqlock);
003707c7
TM		 888}
889
dc0b027d 890static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 891{
8bda4e4c
TM		 892 /*
893 * Protect the call to nfs4_state_set_mode_locked and
894 * serialise the stateid update
895 */
896 write_seqlock(&state->seqlock);
003707c7
TM		 897 if (deleg_stateid != NULL) {
898 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
899 set_bit(NFS_DELEGATED_STATE, &state->flags);
900 }
901 if (open_stateid != NULL)
dc0b027d 902 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 903 write_sequnlock(&state->seqlock);
904 spin_lock(&state->owner->so_lock);
dc0b027d 905 update_open_stateflags(state, fmode);
ec073428 906 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 907}
908
dc0b027d 909static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 910{
911 struct nfs_inode *nfsi = NFS_I(state->inode);
912 struct nfs_delegation *deleg_cur;
913 int ret = 0;
914
dc0b027d 915 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 916
917 rcu_read_lock();
918 deleg_cur = rcu_dereference(nfsi->delegation);
919 if (deleg_cur == NULL)
920 goto no_delegation;
921
922 spin_lock(&deleg_cur->lock);
923 if (nfsi->delegation != deleg_cur ||
dc0b027d 924 (deleg_cur->type & fmode) != fmode)
34310430
TM		 925 goto no_delegation_unlock;
926
927 if (delegation == NULL)
928 delegation = &deleg_cur->stateid;
929 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
930 goto no_delegation_unlock;
931
b7391f44 932 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 933 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 934 ret = 1;
935no_delegation_unlock:
936 spin_unlock(&deleg_cur->lock);
937no_delegation:
938 rcu_read_unlock();
939
940 if (!ret && open_stateid != NULL) {
dc0b027d 941 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 942 ret = 1;
943 }
944
945 return ret;
946}
947
948
dc0b027d 949static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 950{
951 struct nfs_delegation *delegation;
952
953 rcu_read_lock();
954 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 955 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 956 rcu_read_unlock();
957 return;
958 }
959 rcu_read_unlock();
960 nfs_inode_return_delegation(inode);
961}
962
6ee41268 963static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 964{
965 struct nfs4_state *state = opendata->state;
966 struct nfs_inode *nfsi = NFS_I(state->inode);
967 struct nfs_delegation *delegation;
dc0b027d
TM		 968 int open_mode = opendata->o_arg.open_flags & O_EXCL;
969 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 970 nfs4_stateid stateid;
971 int ret = -EAGAIN;
972
aac00a8d 973 for (;;) {
dc0b027d 974 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 975 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 976 if (can_open_cached(state, fmode, open_mode)) {
977 update_open_stateflags(state, fmode);
6ee41268 978 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 979 goto out_return_state;
980 }
981 spin_unlock(&state->owner->so_lock);
982 }
34310430
TM		 983 rcu_read_lock();
984 delegation = rcu_dereference(nfsi->delegation);
985 if (delegation == NULL ||
dc0b027d 986 !can_open_delegated(delegation, fmode)) {
34310430 987 rcu_read_unlock();
aac00a8d 988 break;
34310430 989 }
aac00a8d
TM		 990 /* Save the delegation */
991 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
992 rcu_read_unlock();
af22f94a 993 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 994 if (ret != 0)
995 goto out;
996 ret = -EAGAIN;
34310430
TM		 997
998 /* Try to update the stateid using the delegation */
dc0b027d 999 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1000 goto out_return_state;
aac00a8d 1001 }
aac00a8d
TM		 1002out:
1003 return ERR_PTR(ret);
1004out_return_state:
1005 atomic_inc(&state->count);
1006 return state;
1007}
1008
24ac23ab
TM		 1009static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1010{
1011 struct inode *inode;
1012 struct nfs4_state *state = NULL;
003707c7 1013 struct nfs_delegation *delegation;
1b370bc2 1014 int ret;
24ac23ab 1015
aac00a8d 1016 if (!data->rpc_done) {
6ee41268 1017 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1018 goto out;
1019 }
1020
1b370bc2 1021 ret = -EAGAIN;
24ac23ab 1022 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1023 goto err;
24ac23ab 1024 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1025 ret = PTR_ERR(inode);
03f28e3a 1026 if (IS_ERR(inode))
1b370bc2
TM		 1027 goto err;
1028 ret = -ENOMEM;
24ac23ab
TM		 1029 state = nfs4_get_open_state(inode, data->owner);
1030 if (state == NULL)
1b370bc2 1031 goto err_put_inode;
549d6ed5 1032 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1033 int delegation_flags = 0;
1034
003707c7
TM		 1035 rcu_read_lock();
1036 delegation = rcu_dereference(NFS_I(inode)->delegation);
1037 if (delegation)
1038 delegation_flags = delegation->flags;
1039 rcu_read_unlock();
15c831bf 1040 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1041 nfs_inode_set_delegation(state->inode,
1042 data->owner->so_cred,
1043 &data->o_res);
1044 else
1045 nfs_inode_reclaim_delegation(state->inode,
1046 data->owner->so_cred,
1047 &data->o_res);
1048 }
34310430
TM		 1049
1050 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1051 data->o_arg.fmode);
24ac23ab 1052 iput(inode);
aac00a8d 1053out:
24ac23ab 1054 return state;
1b370bc2
TM		 1055err_put_inode:
1056 iput(inode);
1057err:
1058 return ERR_PTR(ret);
24ac23ab
TM		 1059}
1060
864472e9
TM		 1061static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1062{
1063 struct nfs_inode *nfsi = NFS_I(state->inode);
1064 struct nfs_open_context *ctx;
1065
1066 spin_lock(&state->inode->i_lock);
1067 list_for_each_entry(ctx, &nfsi->open_files, list) {
1068 if (ctx->state != state)
1069 continue;
1070 get_nfs_open_context(ctx);
1071 spin_unlock(&state->inode->i_lock);
1072 return ctx;
1073 }
1074 spin_unlock(&state->inode->i_lock);
1075 return ERR_PTR(-ENOENT);
1076}
1077
6f220ed5
TM		 1078static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1079{
1080 struct nfs4_opendata *opendata;
1081
8535b2be 1082 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1083 if (opendata == NULL)
1084 return ERR_PTR(-ENOMEM);
1085 opendata->state = state;
1086 atomic_inc(&state->count);
1087 return opendata;
1088}
1089
dc0b027d 1090static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1091{
2ced46c2 1092 struct nfs4_state *newstate;
864472e9
TM		 1093 int ret;
1094
dc0b027d
TM		 1095 opendata->o_arg.open_flags = 0;
1096 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1097 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1098 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1099 nfs4_init_opendata_res(opendata);
b257957e 1100 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1101 if (ret != 0)
1102 return ret;
2ced46c2 1103 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1104 if (IS_ERR(newstate))
1105 return PTR_ERR(newstate);
dc0b027d 1106 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1107 *res = newstate;
864472e9
TM		 1108 return 0;
1109}
1110
1111static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1112{
864472e9 1113 struct nfs4_state *newstate;
864472e9
TM		 1114 int ret;
1115
1116 /* memory barrier prior to reading state->n_* */
2ced46c2 1117 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1118 smp_rmb();
1119 if (state->n_rdwr != 0) {
b0ed9dbc 1120 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1121 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1122 if (ret != 0)
1123 return ret;
2ced46c2
TM		 1124 if (newstate != state)
1125 return -ESTALE;
864472e9
TM		 1126 }
1127 if (state->n_wronly != 0) {
b0ed9dbc 1128 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1129 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1130 if (ret != 0)
1131 return ret;
2ced46c2
TM		 1132 if (newstate != state)
1133 return -ESTALE;
864472e9
TM		 1134 }
1135 if (state->n_rdonly != 0) {
b0ed9dbc 1136 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1137 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1138 if (ret != 0)
1139 return ret;
2ced46c2
TM		 1140 if (newstate != state)
1141 return -ESTALE;
864472e9 1142 }
1ac7e2fd
TM		 1143 /*
1144 * We may have performed cached opens for all three recoveries.
1145 * Check if we need to update the current stateid.
1146 */
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1148 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1149 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1150 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1151 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1152 write_sequnlock(&state->seqlock);
1ac7e2fd 1153 }
864472e9
TM		 1154 return 0;
1155}
1156
1da177e4
LT		 1157/*
1158 * OPEN_RECLAIM:
1159 * reclaim state on the server after a reboot.
1da177e4 1160 */
539cd03a 1161static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1162{
1ac7e2fd 1163 struct nfs_delegation *delegation;
864472e9 1164 struct nfs4_opendata *opendata;
dc0b027d 1165 fmode_t delegation_type = 0;
1da177e4
LT		 1166 int status;
1167
6f220ed5
TM		 1168 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1169 if (IS_ERR(opendata))
1170 return PTR_ERR(opendata);
864472e9
TM		 1171 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1172 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1173 rcu_read_lock();
1174 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1175 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1176 delegation_type = delegation->type;
1ac7e2fd 1177 rcu_read_unlock();
864472e9
TM		 1178 opendata->o_arg.u.delegation_type = delegation_type;
1179 status = nfs4_open_recover(opendata, state);
c6d00e63 1180 nfs4_opendata_put(opendata);
1da177e4
LT		 1181 return status;
1182}
1183
539cd03a 1184static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1185{
1186 struct nfs_server *server = NFS_SERVER(state->inode);
1187 struct nfs4_exception exception = { };
1188 int err;
1189 do {
539cd03a 1190 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1191 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1192 break;
1193 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1194 } while (exception.retry);
1195 return err;
1196}
1197
864472e9
TM		 1198static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1199{
1200 struct nfs_open_context *ctx;
1201 int ret;
1202
1203 ctx = nfs4_state_find_open_context(state);
1204 if (IS_ERR(ctx))
1205 return PTR_ERR(ctx);
539cd03a 1206 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1207 put_nfs_open_context(ctx);
1208 return ret;
1209}
1210
13437e12 1211static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1212{
e56e0b78 1213 struct nfs4_opendata *opendata;
864472e9 1214 int ret;
1da177e4 1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
e56e0b78 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1220 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1221 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1222 ret = nfs4_open_recover(opendata, state);
c6d00e63 1223 nfs4_opendata_put(opendata);
864472e9 1224 return ret;
1da177e4
LT		 1225}
1226
13437e12 1227int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1228{
1229 struct nfs4_exception exception = { };
539cd03a 1230 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1231 int err;
1232 do {
13437e12 1233 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1234 switch (err) {
1235 case 0:
965b5d67
TM		 1236 case -ENOENT:
1237 case -ESTALE:
1238 goto out;
bcfa49f6
RL		 1239 case -NFS4ERR_BADSESSION:
1240 case -NFS4ERR_BADSLOT:
1241 case -NFS4ERR_BAD_HIGH_SLOT:
1242 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1243 case -NFS4ERR_DEADSESSION:
1244 nfs4_schedule_state_recovery(
1245 server->nfs_client);
1246 goto out;
1da177e4
LT		 1247 case -NFS4ERR_STALE_CLIENTID:
1248 case -NFS4ERR_STALE_STATEID:
1249 case -NFS4ERR_EXPIRED:
1250 /* Don't recall a delegation if it was lost */
7539bbab 1251 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1252 goto out;
1253 case -ERESTARTSYS:
1254 /*
1255 * The show must go on: exit, but mark the
1256 * stateid as needing recovery.
1257 */
1258 case -NFS4ERR_ADMIN_REVOKED:
1259 case -NFS4ERR_BAD_STATEID:
1260 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
168667c4
TM		 1261 case -EKEYEXPIRED:
1262 /*
1263 * User RPCSEC_GSS context has expired.
1264 * We cannot recover this stateid now, so
1265 * skip it and allow recovery thread to
1266 * proceed.
1267 */
965b5d67
TM		 1268 case -ENOMEM:
1269 err = 0;
1270 goto out;
1da177e4
LT		 1271 }
1272 err = nfs4_handle_exception(server, err, &exception);
1273 } while (exception.retry);
965b5d67 1274out:
1da177e4
LT		 1275 return err;
1276}
1277
cdd4e68b
TM		 1278static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1279{
1280 struct nfs4_opendata *data = calldata;
1281
1282 data->rpc_status = task->tk_status;
26e976a8 1283 if (data->rpc_status == 0) {
cdd4e68b
TM		 1284 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1285 sizeof(data->o_res.stateid.data));
bb22629e 1286 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1287 renew_lease(data->o_res.server, data->timestamp);
3e309914 1288 data->rpc_done = 1;
26e976a8 1289 }
cdd4e68b
TM		 1290}
1291
1292static void nfs4_open_confirm_release(void *calldata)
1293{
1294 struct nfs4_opendata *data = calldata;
1295 struct nfs4_state *state = NULL;
1296
1297 /* If this request hasn't been cancelled, do nothing */
1298 if (data->cancelled == 0)
1299 goto out_free;
1300 /* In case of error, no cleanup! */
3e309914 1301 if (!data->rpc_done)
cdd4e68b 1302 goto out_free;
cdd4e68b 1303 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1304 if (!IS_ERR(state))
dc0b027d 1305 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1306out_free:
c6d00e63 1307 nfs4_opendata_put(data);
cdd4e68b
TM		 1308}
1309
1310static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1311 .rpc_call_done = nfs4_open_confirm_done,
1312 .rpc_release = nfs4_open_confirm_release,
1313};
1314
1315/*
1316 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1317 */
1318static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1319{
1320 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1321 struct rpc_task *task;
5138fde0
TM		 1322 struct rpc_message msg = {
1323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1324 .rpc_argp = &data->c_arg,
1325 .rpc_resp = &data->c_res,
1326 .rpc_cred = data->owner->so_cred,
1327 };
c970aa85
TM		 1328 struct rpc_task_setup task_setup_data = {
1329 .rpc_client = server->client,
5138fde0 1330 .rpc_message = &msg,
c970aa85
TM		 1331 .callback_ops = &nfs4_open_confirm_ops,
1332 .callback_data = data,
101070ca 1333 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1334 .flags = RPC_TASK_ASYNC,
1335 };
1da177e4
LT		 1336 int status;
1337
c6d00e63 1338 kref_get(&data->kref);
3e309914
TM		 1339 data->rpc_done = 0;
1340 data->rpc_status = 0;
5138fde0 1341 data->timestamp = jiffies;
c970aa85 1342 task = rpc_run_task(&task_setup_data);
7a1218a2 1343 if (IS_ERR(task))
cdd4e68b 1344 return PTR_ERR(task);
cdd4e68b
TM		 1345 status = nfs4_wait_for_completion_rpc_task(task);
1346 if (status != 0) {
1347 data->cancelled = 1;
1348 smp_wmb();
1349 } else
1350 status = data->rpc_status;
e6b3c4db 1351 rpc_put_task(task);
1da177e4
LT		 1352 return status;
1353}
1354
24ac23ab 1355static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1356{
24ac23ab
TM		 1357 struct nfs4_opendata *data = calldata;
1358 struct nfs4_state_owner *sp = data->owner;
5138fde0 1359
24ac23ab
TM		 1360 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1361 return;
aac00a8d
TM		 1362 /*
1363 * Check if we still need to send an OPEN call, or if we can use
1364 * a delegation instead.
1365 */
1366 if (data->state != NULL) {
1367 struct nfs_delegation *delegation;
1368
dc0b027d 1369 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1370 goto out_no_action;
aac00a8d
TM		 1371 rcu_read_lock();
1372 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1373 if (delegation != NULL &&
15c831bf 1374 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1375 rcu_read_unlock();
6ee41268 1376 goto out_no_action;
aac00a8d
TM		 1377 }
1378 rcu_read_unlock();
1379 }
24ac23ab 1380 /* Update sequence id. */
9f958ab8 1381 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1382 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1383 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1384 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1385 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1386 }
26e976a8 1387 data->timestamp = jiffies;
035168ab 1388 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1389 &data->o_arg.seq_args,
1390 &data->o_res.seq_res, 1, task))
1391 return;
5138fde0 1392 rpc_call_start(task);
6ee41268
TM		 1393 return;
1394out_no_action:
1395 task->tk_action = NULL;
1396
24ac23ab 1397}
1da177e4 1398
b257957e
AB		 1399static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1400{
1401 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1402 nfs4_open_prepare(task, calldata);
1403}
1404
24ac23ab
TM		 1405static void nfs4_open_done(struct rpc_task *task, void *calldata)
1406{
1407 struct nfs4_opendata *data = calldata;
1da177e4 1408
24ac23ab 1409 data->rpc_status = task->tk_status;
d898528c 1410
14516c3a
TM		 1411 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1412 return;
d898528c 1413
24ac23ab
TM		 1414 if (task->tk_status == 0) {
1415 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1416 case S_IFREG:
1417 break;
1418 case S_IFLNK:
24ac23ab 1419 data->rpc_status = -ELOOP;
6f926b5b
TM		 1420 break;
1421 case S_IFDIR:
24ac23ab 1422 data->rpc_status = -EISDIR;
6f926b5b
TM		 1423 break;
1424 default:
24ac23ab 1425 data->rpc_status = -ENOTDIR;
6f926b5b 1426 }
26e976a8 1427 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1428 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1429 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1430 }
3e309914 1431 data->rpc_done = 1;
24ac23ab 1432}
6f926b5b 1433
24ac23ab
TM		 1434static void nfs4_open_release(void *calldata)
1435{
1436 struct nfs4_opendata *data = calldata;
1437 struct nfs4_state *state = NULL;
1438
1439 /* If this request hasn't been cancelled, do nothing */
1440 if (data->cancelled == 0)
1441 goto out_free;
1442 /* In case of error, no cleanup! */
3e309914 1443 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1444 goto out_free;
1445 /* In case we need an open_confirm, no cleanup! */
1446 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1447 goto out_free;
24ac23ab 1448 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1449 if (!IS_ERR(state))
dc0b027d 1450 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1451out_free:
c6d00e63 1452 nfs4_opendata_put(data);
24ac23ab
TM		 1453}
1454
1455static const struct rpc_call_ops nfs4_open_ops = {
1456 .rpc_call_prepare = nfs4_open_prepare,
1457 .rpc_call_done = nfs4_open_done,
1458 .rpc_release = nfs4_open_release,
1459};
1460
b257957e
AB		 1461static const struct rpc_call_ops nfs4_recover_open_ops = {
1462 .rpc_call_prepare = nfs4_recover_open_prepare,
1463 .rpc_call_done = nfs4_open_done,
1464 .rpc_release = nfs4_open_release,
1465};
1466
1467static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1468{
1469 struct inode *dir = data->dir->d_inode;
1470 struct nfs_server *server = NFS_SERVER(dir);
1471 struct nfs_openargs *o_arg = &data->o_arg;
1472 struct nfs_openres *o_res = &data->o_res;
1473 struct rpc_task *task;
5138fde0
TM		 1474 struct rpc_message msg = {
1475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1476 .rpc_argp = o_arg,
1477 .rpc_resp = o_res,
1478 .rpc_cred = data->owner->so_cred,
1479 };
c970aa85
TM		 1480 struct rpc_task_setup task_setup_data = {
1481 .rpc_client = server->client,
5138fde0 1482 .rpc_message = &msg,
c970aa85
TM		 1483 .callback_ops = &nfs4_open_ops,
1484 .callback_data = data,
101070ca 1485 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1486 .flags = RPC_TASK_ASYNC,
1487 };
24ac23ab
TM		 1488 int status;
1489
c6d00e63 1490 kref_get(&data->kref);
3e309914
TM		 1491 data->rpc_done = 0;
1492 data->rpc_status = 0;
2ced46c2 1493 data->cancelled = 0;
b257957e
AB		 1494 if (isrecover)
1495 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1496 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1497 if (IS_ERR(task))
1498 return PTR_ERR(task);
1499 status = nfs4_wait_for_completion_rpc_task(task);
1500 if (status != 0) {
1501 data->cancelled = 1;
1502 smp_wmb();
1503 } else
1504 status = data->rpc_status;
1505 rpc_put_task(task);
1506
1507 return status;
1508}
1509
1510static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1511{
1512 struct inode *dir = data->dir->d_inode;
1513 struct nfs_openres *o_res = &data->o_res;
1514 int status;
1515
1516 status = nfs4_run_open_task(data, 1);
1517 if (status != 0 || !data->rpc_done)
1518 return status;
1519
1520 nfs_refresh_inode(dir, o_res->dir_attr);
1521
1522 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1523 status = _nfs4_proc_open_confirm(data);
1524 if (status != 0)
1525 return status;
1526 }
1527
1528 return status;
1529}
1530
1531/*
1532 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1533 */
1534static int _nfs4_proc_open(struct nfs4_opendata *data)
1535{
1536 struct inode *dir = data->dir->d_inode;
1537 struct nfs_server *server = NFS_SERVER(dir);
1538 struct nfs_openargs *o_arg = &data->o_arg;
1539 struct nfs_openres *o_res = &data->o_res;
1540 int status;
1541
1542 status = nfs4_run_open_task(data, 0);
3e309914 1543 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1544 return status;
1545
56ae19f3
TM		 1546 if (o_arg->open_flags & O_CREAT) {
1547 update_changeattr(dir, &o_res->cinfo);
1548 nfs_post_op_update_inode(dir, o_res->dir_attr);
1549 } else
1550 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1551 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1552 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1553 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1554 status = _nfs4_proc_open_confirm(data);
1da177e4 1555 if (status != 0)
24ac23ab 1556 return status;
1da177e4
LT		 1557 }
1558 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1559 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1560 return 0;
1da177e4
LT		 1561}
1562
10afec90 1563static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1564{
7539bbab 1565 struct nfs_client *clp = server->nfs_client;
a78cb57a 1566 unsigned int loop;
6b30954e 1567 int ret;
58d9714a 1568
a78cb57a 1569 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1570 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1571 if (ret != 0)
a78cb57a 1572 break;
e598d843
TM		 1573 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1574 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1575 break;
58d9714a 1576 nfs4_schedule_state_recovery(clp);
a78cb57a 1577 ret = -EIO;
6b30954e 1578 }
a78cb57a 1579 return ret;
58d9714a
TM		 1580}
1581
1da177e4
LT		 1582/*
1583 * OPEN_EXPIRED:
1584 * reclaim state on the server after a network partition.
1585 * Assumes caller holds the appropriate lock
1586 */
539cd03a 1587static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1588{
e56e0b78 1589 struct nfs4_opendata *opendata;
864472e9 1590 int ret;
1da177e4 1591
6f220ed5
TM		 1592 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1593 if (IS_ERR(opendata))
1594 return PTR_ERR(opendata);
864472e9 1595 ret = nfs4_open_recover(opendata, state);
35d05778 1596 if (ret == -ESTALE)
539cd03a 1597 d_drop(ctx->path.dentry);
c6d00e63 1598 nfs4_opendata_put(opendata);
864472e9 1599 return ret;
1da177e4
LT		 1600}
1601
a9ed2e25 1602static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1603{
539cd03a 1604 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1605 struct nfs4_exception exception = { };
1606 int err;
1607
1608 do {
539cd03a 1609 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1610 switch (err) {
1611 default:
1612 goto out;
1613 case -NFS4ERR_GRACE:
1614 case -NFS4ERR_DELAY:
1615 nfs4_handle_exception(server, err, &exception);
1616 err = 0;
1617 }
202b50dc 1618 } while (exception.retry);
a9ed2e25 1619out:
202b50dc
TM		 1620 return err;
1621}
1622
1da177e4
LT		 1623static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1624{
1da177e4 1625 struct nfs_open_context *ctx;
864472e9 1626 int ret;
1da177e4 1627
864472e9
TM		 1628 ctx = nfs4_state_find_open_context(state);
1629 if (IS_ERR(ctx))
1630 return PTR_ERR(ctx);
539cd03a 1631 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1632 put_nfs_open_context(ctx);
1633 return ret;
1da177e4
LT		 1634}
1635
aa53ed54
JL		 1636/*
1637 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1638 * fields corresponding to attributes that were used to store the verifier.
1639 * Make sure we clobber those fields in the later setattr call
1640 */
1641static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1642{
1643 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1644 !(sattr->ia_valid & ATTR_ATIME_SET))
1645 sattr->ia_valid |= ATTR_ATIME;
1646
1647 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1648 !(sattr->ia_valid & ATTR_MTIME_SET))
1649 sattr->ia_valid |= ATTR_MTIME;
1650}
1651
1da177e4 1652/*
24ac23ab 1653 * Returns a referenced nfs4_state
1da177e4 1654 */
dc0b027d 1655static 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		 1656{
1657 struct nfs4_state_owner *sp;
1658 struct nfs4_state *state = NULL;
1659 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1660 struct nfs4_opendata *opendata;
aac00a8d 1661 int status;
1da177e4
LT		 1662
1663 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1664 status = -ENOMEM;
1665 if (!(sp = nfs4_get_state_owner(server, cred))) {
1666 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1667 goto out_err;
1668 }
58d9714a
TM		 1669 status = nfs4_recover_expired_lease(server);
1670 if (status != 0)
b4454fe1 1671 goto err_put_state_owner;
aac00a8d 1672 if (path->dentry->d_inode != NULL)
dc0b027d 1673 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1674 status = -ENOMEM;
8535b2be 1675 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1676 if (opendata == NULL)
95d35cb4 1677 goto err_put_state_owner;
1da177e4 1678
aac00a8d
TM		 1679 if (path->dentry->d_inode != NULL)
1680 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1681
24ac23ab 1682 status = _nfs4_proc_open(opendata);
1da177e4 1683 if (status != 0)
c6d00e63 1684 goto err_opendata_put;
1da177e4 1685
24ac23ab 1686 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1687 status = PTR_ERR(state);
1688 if (IS_ERR(state))
c6d00e63 1689 goto err_opendata_put;
0df5dd4a 1690 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1691 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1692
1693 if (opendata->o_arg.open_flags & O_EXCL) {
1694 nfs4_exclusive_attrset(opendata, sattr);
1695
1696 nfs_fattr_init(opendata->o_res.f_attr);
1697 status = nfs4_do_setattr(state->inode, cred,
1698 opendata->o_res.f_attr, sattr,
1699 state);
1700 if (status == 0)
1701 nfs_setattr_update_inode(state->inode, sattr);
1702 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1703 }
c6d00e63 1704 nfs4_opendata_put(opendata);
1da177e4 1705 nfs4_put_state_owner(sp);
1da177e4
LT		 1706 *res = state;
1707 return 0;
c6d00e63
TM		 1708err_opendata_put:
1709 nfs4_opendata_put(opendata);
e56e0b78
TM		 1710err_put_state_owner:
1711 nfs4_put_state_owner(sp);
1da177e4 1712out_err:
1da177e4
LT		 1713 *res = NULL;
1714 return status;
1715}
1716
1717
dc0b027d 1718static 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		 1719{
1720 struct nfs4_exception exception = { };
1721 struct nfs4_state *res;
1722 int status;
1723
1724 do {
dc0b027d 1725 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1726 if (status == 0)
1727 break;
1728 /* NOTE: BAD_SEQID means the server and client disagree about the
1729 * book-keeping w.r.t. state-changing operations
1730 * (OPEN/CLOSE/LOCK/LOCKU...)
1731 * It is actually a sign of a bug on the client or on the server.
1732 *
1733 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1734 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1735 * have unhashed the old state_owner for us, and that we can
1736 * therefore safely retry using a new one. We should still warn
1737 * the user though...
1738 */
1739 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1740 printk(KERN_WARNING "NFS: v4 server %s "
1741 " returned a bad sequence-id error!\n",
1742 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1743 exception.retry = 1;
1744 continue;
1745 }
550f5747
TM		 1746 /*
1747 * BAD_STATEID on OPEN means that the server cancelled our
1748 * state before it received the OPEN_CONFIRM.
1749 * Recover by retrying the request as per the discussion
1750 * on Page 181 of RFC3530.
1751 */
1752 if (status == -NFS4ERR_BAD_STATEID) {
1753 exception.retry = 1;
1754 continue;
1755 }
aac00a8d
TM		 1756 if (status == -EAGAIN) {
1757 /* We must have found a delegation */
1758 exception.retry = 1;
1759 continue;
1760 }
1da177e4
LT		 1761 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1762 status, &exception));
1763 } while (exception.retry);
1764 return res;
1765}
1766
659bfcd6
TM		 1767static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1768 struct nfs_fattr *fattr, struct iattr *sattr,
1769 struct nfs4_state *state)
1da177e4 1770{
3e4f6290 1771 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1772 struct nfs_setattrargs arg = {
3e4f6290 1773 .fh = NFS_FH(inode),
1da177e4
LT		 1774 .iap = sattr,
1775 .server = server,
1776 .bitmask = server->attr_bitmask,
1777 };
1778 struct nfs_setattrres res = {
1779 .fattr = fattr,
1780 .server = server,
1781 };
1782 struct rpc_message msg = {
659bfcd6
TM		 1783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1784 .rpc_argp = &arg,
1785 .rpc_resp = &res,
1786 .rpc_cred = cred,
1da177e4 1787 };
26e976a8 1788 unsigned long timestamp = jiffies;
65e4308d 1789 int status;
1da177e4 1790
0e574af1 1791 nfs_fattr_init(fattr);
1da177e4 1792
3e4f6290
TM		 1793 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1794 /* Use that stateid */
1795 } else if (state != NULL) {
77041ed9 1796 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1797 } else
1da177e4
LT		 1798 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1799
cccef3b9 1800 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1801 if (status == 0 && state != NULL)
1802 renew_lease(server, timestamp);
65e4308d 1803 return status;
1da177e4
LT		 1804}
1805
659bfcd6
TM		 1806static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1807 struct nfs_fattr *fattr, struct iattr *sattr,
1808 struct nfs4_state *state)
1da177e4 1809{
3e4f6290 1810 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1811 struct nfs4_exception exception = { };
1812 int err;
1813 do {
1814 err = nfs4_handle_exception(server,
659bfcd6 1815 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1816 &exception);
1817 } while (exception.retry);
1818 return err;
1819}
1820
1821struct nfs4_closedata {
4a35bd41 1822 struct path path;
1da177e4
LT		 1823 struct inode *inode;
1824 struct nfs4_state *state;
1825 struct nfs_closeargs arg;
1826 struct nfs_closeres res;
516a6af6 1827 struct nfs_fattr fattr;
26e976a8 1828 unsigned long timestamp;
1da177e4
LT		 1829};
1830
963d8fe5 1831static void nfs4_free_closedata(void *data)
9512135d 1832{
963d8fe5
TM		 1833 struct nfs4_closedata *calldata = data;
1834 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1835
1836 nfs4_put_open_state(calldata->state);
1837 nfs_free_seqid(calldata->arg.seqid);
9512135d 1838 nfs4_put_state_owner(sp);
31f31db1 1839 path_put(&calldata->path);
9512135d
TM		 1840 kfree(calldata);
1841}
1842
88069f77
TM		 1843static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1844 fmode_t fmode)
1845{
1846 spin_lock(&state->owner->so_lock);
1847 if (!(fmode & FMODE_READ))
1848 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1849 if (!(fmode & FMODE_WRITE))
1850 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1851 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1852 spin_unlock(&state->owner->so_lock);
1853}
1854
963d8fe5 1855static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1856{
963d8fe5 1857 struct nfs4_closedata *calldata = data;
1da177e4 1858 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1859 struct nfs_server *server = NFS_SERVER(calldata->inode);
1860
14516c3a
TM		 1861 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1862 return;
1da177e4
LT		 1863 /* hmm. we are done with the inode, and in the process of freeing
1864 * the state_owner. we keep this around to process errors
1865 */
1da177e4
LT		 1866 switch (task->tk_status) {
1867 case 0:
45328c35 1868 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1869 renew_lease(server, calldata->timestamp);
88069f77
TM		 1870 nfs4_close_clear_stateid_flags(state,
1871 calldata->arg.fmode);
1da177e4
LT		 1872 break;
1873 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1874 case -NFS4ERR_OLD_STATEID:
1875 case -NFS4ERR_BAD_STATEID:
1da177e4 1876 case -NFS4ERR_EXPIRED:
dc0b027d 1877 if (calldata->arg.fmode == 0)
9e33bed5 1878 break;
1da177e4 1879 default:
72211dbe
TM		 1880 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1881 rpc_restart_call_prepare(task);
1da177e4 1882 }
72211dbe 1883 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1884 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1885}
1886
4ce70ada 1887static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1888{
4ce70ada 1889 struct nfs4_closedata *calldata = data;
9512135d 1890 struct nfs4_state *state = calldata->state;
88069f77 1891 int call_close = 0;
9512135d 1892
963d8fe5 1893 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1894 return;
003707c7 1895
88069f77
TM		 1896 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1897 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1898 spin_lock(&state->owner->so_lock);
003707c7 1899 /* Calculate the change in open mode */
e7616923 1900 if (state->n_rdwr == 0) {
003707c7 1901 if (state->n_rdonly == 0) {
88069f77
TM		 1902 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1903 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1904 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1905 }
1906 if (state->n_wronly == 0) {
88069f77
TM		 1907 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1908 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1909 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1910 }
e7616923 1911 }
4cecb76f 1912 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1913
1914 if (!call_close) {
963d8fe5
TM		 1915 /* Note: exit _without_ calling nfs4_close_done */
1916 task->tk_action = NULL;
9512135d
TM		 1917 return;
1918 }
88069f77
TM		 1919
1920 if (calldata->arg.fmode == 0)
1921 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1922
516a6af6 1923 nfs_fattr_init(calldata->res.fattr);
26e976a8 1924 calldata->timestamp = jiffies;
035168ab 1925 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1926 &calldata->arg.seq_args, &calldata->res.seq_res,
1927 1, task))
1928 return;
5138fde0 1929 rpc_call_start(task);
1da177e4
LT		 1930}
1931
963d8fe5 1932static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1933 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1934 .rpc_call_done = nfs4_close_done,
1935 .rpc_release = nfs4_free_closedata,
1936};
1937
1da177e4
LT		 1938/*
1939 * It is possible for data to be read/written from a mem-mapped file
1940 * after the sys_close call (which hits the vfs layer as a flush).
1941 * This means that we can't safely call nfsv4 close on a file until
1942 * the inode is cleared. This in turn means that we are not good
1943 * NFSv4 citizens - we do not indicate to the server to update the file's
1944 * share state even when we are done with one of the three share
1945 * stateid's in the inode.
1946 *
1947 * NOTE: Caller must be holding the sp->so_owner semaphore!
1948 */
8535b2be 1949int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 1950{
4a35bd41 1951 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1952 struct nfs4_closedata *calldata;
b39e625b
TM		 1953 struct nfs4_state_owner *sp = state->owner;
1954 struct rpc_task *task;
5138fde0
TM		 1955 struct rpc_message msg = {
1956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1957 .rpc_cred = state->owner->so_cred,
1958 };
c970aa85
TM		 1959 struct rpc_task_setup task_setup_data = {
1960 .rpc_client = server->client,
5138fde0 1961 .rpc_message = &msg,
c970aa85 1962 .callback_ops = &nfs4_close_ops,
101070ca 1963 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1964 .flags = RPC_TASK_ASYNC,
1965 };
9512135d 1966 int status = -ENOMEM;
1da177e4 1967
8535b2be 1968 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1969 if (calldata == NULL)
9512135d 1970 goto out;
4a35bd41 1971 calldata->inode = state->inode;
1da177e4 1972 calldata->state = state;
4a35bd41 1973 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1974 calldata->arg.stateid = &state->open_stateid;
1da177e4 1975 /* Serialization for the sequence id */
8535b2be 1976 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 1977 if (calldata->arg.seqid == NULL)
1978 goto out_free_calldata;
dc0b027d 1979 calldata->arg.fmode = 0;
a65318bf 1980 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1981 calldata->res.fattr = &calldata->fattr;
c1d51931 1982 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1983 calldata->res.server = server;
f6948697
AV		 1984 path_get(path);
1985 calldata->path = *path;
9512135d 1986
1174dd1f
TM		 1987 msg.rpc_argp = &calldata->arg;
1988 msg.rpc_resp = &calldata->res;
c970aa85
TM		 1989 task_setup_data.callback_data = calldata;
1990 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1991 if (IS_ERR(task))
1992 return PTR_ERR(task);
a49c3c77
TM		 1993 status = 0;
1994 if (wait)
1995 status = rpc_wait_for_completion_task(task);
b39e625b 1996 rpc_put_task(task);
a49c3c77 1997 return status;
9512135d
TM		 1998out_free_calldata:
1999 kfree(calldata);
2000out:
b39e625b
TM		 2001 nfs4_put_open_state(state);
2002 nfs4_put_state_owner(sp);
9512135d 2003 return status;
1da177e4
LT		 2004}
2005
2b484297 2006static struct inode *
cd9a1c0e 2007nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2008{
1da177e4 2009 struct nfs4_state *state;
1da177e4 2010
565277f6 2011 /* Protect against concurrent sillydeletes */
cd9a1c0e 2012 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2013 if (IS_ERR(state))
2014 return ERR_CAST(state);
cd9a1c0e 2015 ctx->state = state;
f46e0bd3 2016 return igrab(state->inode);
1da177e4
LT		 2017}
2018
1185a552 2019static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2020{
2021 if (ctx->state == NULL)
2022 return;
2023 if (is_sync)
2024 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2025 else
2026 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2027}
1da177e4
LT		 2028
2029static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2030{
43652ad5
BH		 2031 struct nfs4_server_caps_arg args = {
2032 .fhandle = fhandle,
2033 };
1da177e4
LT		 2034 struct nfs4_server_caps_res res = {};
2035 struct rpc_message msg = {
2036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2037 .rpc_argp = &args,
1da177e4
LT		 2038 .rpc_resp = &res,
2039 };
2040 int status;
2041
cccef3b9 2042 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2043 if (status == 0) {
2044 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2045 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2046 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2047 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2048 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2049 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2050 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2051 server->caps |= NFS_CAP_ACLS;
2052 if (res.has_links != 0)
2053 server->caps |= NFS_CAP_HARDLINKS;
2054 if (res.has_symlinks != 0)
2055 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2056 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2057 server->caps |= NFS_CAP_FILEID;
2058 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2059 server->caps |= NFS_CAP_MODE;
2060 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2061 server->caps |= NFS_CAP_NLINK;
2062 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2063 server->caps |= NFS_CAP_OWNER;
2064 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2065 server->caps |= NFS_CAP_OWNER_GROUP;
2066 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2067 server->caps |= NFS_CAP_ATIME;
2068 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2069 server->caps |= NFS_CAP_CTIME;
2070 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2071 server->caps |= NFS_CAP_MTIME;
2072
a65318bf
TM		 2073 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2074 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2075 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2076 server->acl_bitmask = res.acl_bitmask;
2077 }
cccef3b9 2078
1da177e4
LT		 2079 return status;
2080}
2081
55a97593 2082int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2083{
2084 struct nfs4_exception exception = { };
2085 int err;
2086 do {
2087 err = nfs4_handle_exception(server,
2088 _nfs4_server_capabilities(server, fhandle),
2089 &exception);
2090 } while (exception.retry);
2091 return err;
2092}
2093
2094static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2095 struct nfs_fsinfo *info)
2096{
1da177e4
LT		 2097 struct nfs4_lookup_root_arg args = {
2098 .bitmask = nfs4_fattr_bitmap,
2099 };
2100 struct nfs4_lookup_res res = {
2101 .server = server,
0e574af1 2102 .fattr = info->fattr,
1da177e4
LT		 2103 .fh = fhandle,
2104 };
2105 struct rpc_message msg = {
2106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2107 .rpc_argp = &args,
2108 .rpc_resp = &res,
2109 };
008f55d0 2110
0e574af1 2111 nfs_fattr_init(info->fattr);
fccba804 2112 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2113}
2114
2115static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2116 struct nfs_fsinfo *info)
2117{
2118 struct nfs4_exception exception = { };
2119 int err;
2120 do {
2121 err = nfs4_handle_exception(server,
2122 _nfs4_lookup_root(server, fhandle, info),
2123 &exception);
2124 } while (exception.retry);
2125 return err;
2126}
2127
54ceac45
DH		 2128/*
2129 * get the file handle for the "/" directory on the server
2130 */
1da177e4 2131static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2132 struct nfs_fsinfo *info)
1da177e4 2133{
1da177e4
LT		 2134 int status;
2135
1da177e4 2136 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2137 if (status == 0)
2138 status = nfs4_server_capabilities(server, fhandle);
2139 if (status == 0)
2140 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2141 return nfs4_map_errors(status);
1da177e4
LT		 2142}
2143
6b97fd3d
MN		 2144/*
2145 * Get locations and (maybe) other attributes of a referral.
2146 * Note that we'll actually follow the referral later when
2147 * we detect fsid mismatch in inode revalidation
2148 */
56659e99 2149static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2150{
2151 int status = -ENOMEM;
2152 struct page *page = NULL;
2153 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2154
2155 page = alloc_page(GFP_KERNEL);
2156 if (page == NULL)
2157 goto out;
2158 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2159 if (locations == NULL)
2160 goto out;
2161
c228fd3a 2162 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2163 if (status != 0)
2164 goto out;
2165 /* Make sure server returned a different fsid for the referral */
2166 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2167 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2168 status = -EIO;
2169 goto out;
2170 }
2171
2172 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2173 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2174 if (!fattr->mode)
2175 fattr->mode = S_IFDIR;
2176 memset(fhandle, 0, sizeof(struct nfs_fh));
2177out:
2178 if (page)
2179 __free_page(page);
5d7ca35a 2180 kfree(locations);
6b97fd3d
MN		 2181 return status;
2182}
2183
1da177e4
LT		 2184static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2185{
2186 struct nfs4_getattr_arg args = {
2187 .fh = fhandle,
2188 .bitmask = server->attr_bitmask,
2189 };
2190 struct nfs4_getattr_res res = {
2191 .fattr = fattr,
2192 .server = server,
2193 };
2194 struct rpc_message msg = {
2195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2196 .rpc_argp = &args,
2197 .rpc_resp = &res,
2198 };
2199
0e574af1 2200 nfs_fattr_init(fattr);
cccef3b9 2201 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2202}
2203
2204static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2205{
2206 struct nfs4_exception exception = { };
2207 int err;
2208 do {
2209 err = nfs4_handle_exception(server,
2210 _nfs4_proc_getattr(server, fhandle, fattr),
2211 &exception);
2212 } while (exception.retry);
2213 return err;
2214}
2215
2216/*
2217 * The file is not closed if it is opened due to the a request to change
2218 * the size of the file. The open call will not be needed once the
2219 * VFS layer lookup-intents are implemented.
2220 *
2221 * Close is called when the inode is destroyed.
2222 * If we haven't opened the file for O_WRONLY, we
2223 * need to in the size_change case to obtain a stateid.
2224 *
2225 * Got race?
2226 * Because OPEN is always done by name in nfsv4, it is
2227 * possible that we opened a different file by the same
2228 * name. We can recognize this race condition, but we
2229 * can't do anything about it besides returning an error.
2230 *
2231 * This will be fixed with VFS changes (lookup-intent).
2232 */
2233static int
2234nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2235 struct iattr *sattr)
2236{
08e9eac4 2237 struct inode *inode = dentry->d_inode;
659bfcd6 2238 struct rpc_cred *cred = NULL;
d530838b 2239 struct nfs4_state *state = NULL;
1da177e4
LT		 2240 int status;
2241
0e574af1 2242 nfs_fattr_init(fattr);
1da177e4 2243
d530838b 2244 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2245 if (sattr->ia_valid & ATTR_FILE) {
2246 struct nfs_open_context *ctx;
2247
2248 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2249 if (ctx) {
2250 cred = ctx->cred;
2251 state = ctx->state;
2252 }
659bfcd6 2253 }
08e9eac4 2254
659bfcd6 2255 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2256 if (status == 0)
2257 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2258 return status;
2259}
2260
56659e99
TM		 2261static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2262 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2263 struct nfs_fattr *fattr)
2264{
2265 int status;
2266 struct nfs4_lookup_arg args = {
2267 .bitmask = server->attr_bitmask,
2268 .dir_fh = dirfh,
2269 .name = name,
2270 };
2271 struct nfs4_lookup_res res = {
2272 .server = server,
2273 .fattr = fattr,
2274 .fh = fhandle,
2275 };
2276 struct rpc_message msg = {
2277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2278 .rpc_argp = &args,
2279 .rpc_resp = &res,
2280 };
2281
2282 nfs_fattr_init(fattr);
2283
2284 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2285 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2286 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2287 return status;
2288}
2289
2290static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2291 struct qstr *name, struct nfs_fh *fhandle,
2292 struct nfs_fattr *fattr)
2293{
2294 struct nfs4_exception exception = { };
2295 int err;
2296 do {
4e56e082
TM		 2297 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2298 /* FIXME: !!!! */
2299 if (err == -NFS4ERR_MOVED) {
2300 err = -EREMOTE;
2301 break;
2302 }
2303 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2304 } while (exception.retry);
2305 return err;
2306}
2307
56659e99 2308static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2309 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2310{
4e56e082 2311 int status;
1da177e4
LT		 2312
2313 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2314 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2315 if (status == -NFS4ERR_MOVED)
2316 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2317 dprintk("NFS reply lookup: %d\n", status);
2318 return status;
2319}
2320
2321static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2322{
2323 struct nfs4_exception exception = { };
2324 int err;
2325 do {
2326 err = nfs4_handle_exception(NFS_SERVER(dir),
2327 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2328 &exception);
2329 } while (exception.retry);
2330 return err;
2331}
2332
2333static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2334{
76b32999 2335 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2336 struct nfs4_accessargs args = {
2337 .fh = NFS_FH(inode),
76b32999
TM		 2338 .bitmask = server->attr_bitmask,
2339 };
2340 struct nfs4_accessres res = {
2341 .server = server,
1da177e4 2342 };
1da177e4
LT		 2343 struct rpc_message msg = {
2344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2345 .rpc_argp = &args,
2346 .rpc_resp = &res,
2347 .rpc_cred = entry->cred,
2348 };
2349 int mode = entry->mask;
2350 int status;
2351
2352 /*
2353 * Determine which access bits we want to ask for...
2354 */
2355 if (mode & MAY_READ)
2356 args.access |= NFS4_ACCESS_READ;
2357 if (S_ISDIR(inode->i_mode)) {
2358 if (mode & MAY_WRITE)
2359 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2360 if (mode & MAY_EXEC)
2361 args.access |= NFS4_ACCESS_LOOKUP;
2362 } else {
2363 if (mode & MAY_WRITE)
2364 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2365 if (mode & MAY_EXEC)
2366 args.access |= NFS4_ACCESS_EXECUTE;
2367 }
c407d41a
TM		 2368
2369 res.fattr = nfs_alloc_fattr();
2370 if (res.fattr == NULL)
2371 return -ENOMEM;
2372
cccef3b9 2373 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2374 if (!status) {
2375 entry->mask = 0;
2376 if (res.access & NFS4_ACCESS_READ)
2377 entry->mask |= MAY_READ;
2378 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2379 entry->mask |= MAY_WRITE;
2380 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2381 entry->mask |= MAY_EXEC;
c407d41a 2382 nfs_refresh_inode(inode, res.fattr);
1da177e4 2383 }
c407d41a 2384 nfs_free_fattr(res.fattr);
1da177e4
LT		 2385 return status;
2386}
2387
2388static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2389{
2390 struct nfs4_exception exception = { };
2391 int err;
2392 do {
2393 err = nfs4_handle_exception(NFS_SERVER(inode),
2394 _nfs4_proc_access(inode, entry),
2395 &exception);
2396 } while (exception.retry);
2397 return err;
2398}
2399
2400/*
2401 * TODO: For the time being, we don't try to get any attributes
2402 * along with any of the zero-copy operations READ, READDIR,
2403 * READLINK, WRITE.
2404 *
2405 * In the case of the first three, we want to put the GETATTR
2406 * after the read-type operation -- this is because it is hard
2407 * to predict the length of a GETATTR response in v4, and thus
2408 * align the READ data correctly. This means that the GETATTR
2409 * may end up partially falling into the page cache, and we should
2410 * shift it into the 'tail' of the xdr_buf before processing.
2411 * To do this efficiently, we need to know the total length
2412 * of data received, which doesn't seem to be available outside
2413 * of the RPC layer.
2414 *
2415 * In the case of WRITE, we also want to put the GETATTR after
2416 * the operation -- in this case because we want to make sure
2417 * we get the post-operation mtime and size. This means that
2418 * we can't use xdr_encode_pages() as written: we need a variant
2419 * of it which would leave room in the 'tail' iovec.
2420 *
2421 * Both of these changes to the XDR layer would in fact be quite
2422 * minor, but I decided to leave them for a subsequent patch.
2423 */
2424static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2425 unsigned int pgbase, unsigned int pglen)
2426{
2427 struct nfs4_readlink args = {
2428 .fh = NFS_FH(inode),
2429 .pgbase = pgbase,
2430 .pglen = pglen,
2431 .pages = &page,
2432 };
f50c7000 2433 struct nfs4_readlink_res res;
1da177e4
LT		 2434 struct rpc_message msg = {
2435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2436 .rpc_argp = &args,
f50c7000 2437 .rpc_resp = &res,
1da177e4
LT		 2438 };
2439
cccef3b9 2440 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2441}
2442
2443static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2444 unsigned int pgbase, unsigned int pglen)
2445{
2446 struct nfs4_exception exception = { };
2447 int err;
2448 do {
2449 err = nfs4_handle_exception(NFS_SERVER(inode),
2450 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2451 &exception);
2452 } while (exception.retry);
2453 return err;
2454}
2455
1da177e4
LT		 2456/*
2457 * Got race?
2458 * We will need to arrange for the VFS layer to provide an atomic open.
2459 * Until then, this create/open method is prone to inefficiency and race
2460 * conditions due to the lookup, create, and open VFS calls from sys_open()
2461 * placed on the wire.
2462 *
2463 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2464 * The file will be opened again in the subsequent VFS open call
2465 * (nfs4_proc_file_open).
2466 *
2467 * The open for read will just hang around to be used by any process that
2468 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2469 */
2470
2471static int
2472nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2473 int flags, struct nfs_open_context *ctx)
1da177e4 2474{
c0204fd2 2475 struct path my_path = {
ad389da7
TM		 2476 .dentry = dentry,
2477 };
c0204fd2 2478 struct path *path = &my_path;
1da177e4 2479 struct nfs4_state *state;
c0204fd2
TM		 2480 struct rpc_cred *cred = NULL;
2481 fmode_t fmode = 0;
1da177e4
LT		 2482 int status = 0;
2483
c0204fd2
TM		 2484 if (ctx != NULL) {
2485 cred = ctx->cred;
2486 path = &ctx->path;
2487 fmode = ctx->mode;
1da177e4 2488 }
c0204fd2 2489 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2490 d_drop(dentry);
1da177e4
LT		 2491 if (IS_ERR(state)) {
2492 status = PTR_ERR(state);
c0204fd2 2493 goto out;
1da177e4 2494 }
d4d9cdcb 2495 d_add(dentry, igrab(state->inode));
d75340cc 2496 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2497 if (ctx != NULL)
2498 ctx->state = state;
02a913a7 2499 else
c0204fd2 2500 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2501out:
2502 return status;
2503}
2504
2505static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2506{
16e42959 2507 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2508 struct nfs_removeargs args = {
1da177e4 2509 .fh = NFS_FH(dir),
4fdc17b2
TM		 2510 .name.len = name->len,
2511 .name.name = name->name,
16e42959
TM		 2512 .bitmask = server->attr_bitmask,
2513 };
4fdc17b2 2514 struct nfs_removeres res = {
16e42959 2515 .server = server,
1da177e4 2516 };
1da177e4 2517 struct rpc_message msg = {
4fdc17b2
TM		 2518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2519 .rpc_argp = &args,
2520 .rpc_resp = &res,
1da177e4 2521 };
d346890b
TM		 2522 int status = -ENOMEM;
2523
2524 res.dir_attr = nfs_alloc_fattr();
2525 if (res.dir_attr == NULL)
2526 goto out;
1da177e4 2527
cccef3b9 2528 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2529 if (status == 0) {
2530 update_changeattr(dir, &res.cinfo);
d346890b 2531 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2532 }
d346890b
TM		 2533 nfs_free_fattr(res.dir_attr);
2534out:
1da177e4
LT		 2535 return status;
2536}
2537
2538static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2539{
2540 struct nfs4_exception exception = { };
2541 int err;
2542 do {
2543 err = nfs4_handle_exception(NFS_SERVER(dir),
2544 _nfs4_proc_remove(dir, name),
2545 &exception);
2546 } while (exception.retry);
2547 return err;
2548}
2549
e4eff1a6 2550static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2551{
e4eff1a6
TM		 2552 struct nfs_server *server = NFS_SERVER(dir);
2553 struct nfs_removeargs *args = msg->rpc_argp;
2554 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2555
a65318bf 2556 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2557 res->server = server;
dfb4f309 2558 res->seq_res.sr_slot = NULL;
1da177e4 2559 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2560}
2561
e4eff1a6 2562static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2563{
e4eff1a6
TM		 2564 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2565
14516c3a
TM		 2566 if (!nfs4_sequence_done(task, &res->seq_res))
2567 return 0;
9e33bed5 2568 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2569 return 0;
2570 update_changeattr(dir, &res->cinfo);
d346890b 2571 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2572 return 1;
1da177e4
LT		 2573}
2574
d3d4152a
JL		 2575static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2576{
2577 struct nfs_server *server = NFS_SERVER(dir);
2578 struct nfs_renameargs *arg = msg->rpc_argp;
2579 struct nfs_renameres *res = msg->rpc_resp;
2580
2581 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2582 arg->bitmask = server->attr_bitmask;
2583 res->server = server;
2584}
2585
2586static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2587 struct inode *new_dir)
2588{
2589 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2590
2591 if (!nfs4_sequence_done(task, &res->seq_res))
2592 return 0;
2593 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2594 return 0;
2595
2596 update_changeattr(old_dir, &res->old_cinfo);
2597 nfs_post_op_update_inode(old_dir, res->old_fattr);
2598 update_changeattr(new_dir, &res->new_cinfo);
2599 nfs_post_op_update_inode(new_dir, res->new_fattr);
2600 return 1;
2601}
2602
1da177e4
LT		 2603static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2604 struct inode *new_dir, struct qstr *new_name)
2605{
6caf2c82 2606 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2607 struct nfs_renameargs arg = {
1da177e4
LT		 2608 .old_dir = NFS_FH(old_dir),
2609 .new_dir = NFS_FH(new_dir),
2610 .old_name = old_name,
2611 .new_name = new_name,
6caf2c82
TM		 2612 .bitmask = server->attr_bitmask,
2613 };
e8582a8b 2614 struct nfs_renameres res = {
6caf2c82 2615 .server = server,
1da177e4 2616 };
1da177e4
LT		 2617 struct rpc_message msg = {
2618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2619 .rpc_argp = &arg,
2620 .rpc_resp = &res,
2621 };
011fff72 2622 int status = -ENOMEM;
1da177e4 2623
011fff72
TM		 2624 res.old_fattr = nfs_alloc_fattr();
2625 res.new_fattr = nfs_alloc_fattr();
2626 if (res.old_fattr == NULL || res.new_fattr == NULL)
2627 goto out;
1da177e4 2628
011fff72 2629 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2630 if (!status) {
2631 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2632 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2633 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2634 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2635 }
011fff72
TM		 2636out:
2637 nfs_free_fattr(res.new_fattr);
2638 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2639 return status;
2640}
2641
2642static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643 struct inode *new_dir, struct qstr *new_name)
2644{
2645 struct nfs4_exception exception = { };
2646 int err;
2647 do {
2648 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2649 _nfs4_proc_rename(old_dir, old_name,
2650 new_dir, new_name),
2651 &exception);
2652 } while (exception.retry);
2653 return err;
2654}
2655
2656static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2657{
91ba2eee 2658 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2659 struct nfs4_link_arg arg = {
2660 .fh = NFS_FH(inode),
2661 .dir_fh = NFS_FH(dir),
2662 .name = name,
91ba2eee
TM		 2663 .bitmask = server->attr_bitmask,
2664 };
91ba2eee
TM		 2665 struct nfs4_link_res res = {
2666 .server = server,
1da177e4 2667 };
1da177e4
LT		 2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2670 .rpc_argp = &arg,
91ba2eee 2671 .rpc_resp = &res,
1da177e4 2672 };
136f2627
TM		 2673 int status = -ENOMEM;
2674
2675 res.fattr = nfs_alloc_fattr();
2676 res.dir_attr = nfs_alloc_fattr();
2677 if (res.fattr == NULL || res.dir_attr == NULL)
2678 goto out;
1da177e4 2679
cccef3b9 2680 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2681 if (!status) {
2682 update_changeattr(dir, &res.cinfo);
2683 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2684 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2685 }
136f2627
TM		 2686out:
2687 nfs_free_fattr(res.dir_attr);
2688 nfs_free_fattr(res.fattr);
1da177e4
LT		 2689 return status;
2690}
2691
2692static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2693{
2694 struct nfs4_exception exception = { };
2695 int err;
2696 do {
2697 err = nfs4_handle_exception(NFS_SERVER(inode),
2698 _nfs4_proc_link(inode, dir, name),
2699 &exception);
2700 } while (exception.retry);
2701 return err;
2702}
2703
57dc9a57
TM		 2704struct nfs4_createdata {
2705 struct rpc_message msg;
2706 struct nfs4_create_arg arg;
2707 struct nfs4_create_res res;
2708 struct nfs_fh fh;
2709 struct nfs_fattr fattr;
2710 struct nfs_fattr dir_fattr;
2711};
2712
2713static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2714 struct qstr *name, struct iattr *sattr, u32 ftype)
2715{
2716 struct nfs4_createdata *data;
2717
2718 data = kzalloc(sizeof(*data), GFP_KERNEL);
2719 if (data != NULL) {
2720 struct nfs_server *server = NFS_SERVER(dir);
2721
2722 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2723 data->msg.rpc_argp = &data->arg;
2724 data->msg.rpc_resp = &data->res;
2725 data->arg.dir_fh = NFS_FH(dir);
2726 data->arg.server = server;
2727 data->arg.name = name;
2728 data->arg.attrs = sattr;
2729 data->arg.ftype = ftype;
2730 data->arg.bitmask = server->attr_bitmask;
2731 data->res.server = server;
2732 data->res.fh = &data->fh;
2733 data->res.fattr = &data->fattr;
2734 data->res.dir_fattr = &data->dir_fattr;
2735 nfs_fattr_init(data->res.fattr);
2736 nfs_fattr_init(data->res.dir_fattr);
2737 }
2738 return data;
2739}
2740
2741static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2742{
cccef3b9
AA		 2743 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2744 &data->arg, &data->res, 1);
57dc9a57
TM		 2745 if (status == 0) {
2746 update_changeattr(dir, &data->res.dir_cinfo);
2747 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2748 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2749 }
2750 return status;
2751}
2752
2753static void nfs4_free_createdata(struct nfs4_createdata *data)
2754{
2755 kfree(data);
2756}
2757
4f390c15 2758static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2759 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2760{
57dc9a57
TM		 2761 struct nfs4_createdata *data;
2762 int status = -ENAMETOOLONG;
1da177e4 2763
94a6d753 2764 if (len > NFS4_MAXPATHLEN)
57dc9a57 2765 goto out;
4f390c15 2766
57dc9a57
TM		 2767 status = -ENOMEM;
2768 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2769 if (data == NULL)
2770 goto out;
2771
2772 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2773 data->arg.u.symlink.pages = &page;
2774 data->arg.u.symlink.len = len;
1da177e4 2775
57dc9a57
TM		 2776 status = nfs4_do_create(dir, dentry, data);
2777
2778 nfs4_free_createdata(data);
2779out:
1da177e4
LT		 2780 return status;
2781}
2782
4f390c15 2783static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2784 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2785{
2786 struct nfs4_exception exception = { };
2787 int err;
2788 do {
2789 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2790 _nfs4_proc_symlink(dir, dentry, page,
2791 len, sattr),
1da177e4
LT		 2792 &exception);
2793 } while (exception.retry);
2794 return err;
2795}
2796
2797static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2798 struct iattr *sattr)
2799{
57dc9a57
TM		 2800 struct nfs4_createdata *data;
2801 int status = -ENOMEM;
1da177e4 2802
57dc9a57
TM		 2803 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2804 if (data == NULL)
2805 goto out;
2806
2807 status = nfs4_do_create(dir, dentry, data);
2808
2809 nfs4_free_createdata(data);
2810out:
1da177e4
LT		 2811 return status;
2812}
2813
2814static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2815 struct iattr *sattr)
2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
2820 err = nfs4_handle_exception(NFS_SERVER(dir),
2821 _nfs4_proc_mkdir(dir, dentry, sattr),
2822 &exception);
2823 } while (exception.retry);
2824 return err;
2825}
2826
2827static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2828 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2829{
2830 struct inode *dir = dentry->d_inode;
2831 struct nfs4_readdir_arg args = {
2832 .fh = NFS_FH(dir),
56e4ebf8 2833 .pages = pages,
1da177e4
LT		 2834 .pgbase = 0,
2835 .count = count,
96d25e53 2836 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2837 .plus = plus,
1da177e4
LT		 2838 };
2839 struct nfs4_readdir_res res;
2840 struct rpc_message msg = {
2841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2842 .rpc_argp = &args,
2843 .rpc_resp = &res,
2844 .rpc_cred = cred,
2845 };
2846 int status;
2847
3110ff80 2848 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2849 dentry->d_parent->d_name.name,
2850 dentry->d_name.name,
2851 (unsigned long long)cookie);
1da177e4
LT		 2852 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2853 res.pgbase = args.pgbase;
cccef3b9 2854 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
ac396128 2855 if (status >= 0) {
1da177e4 2856 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2857 status += args.pgbase;
2858 }
c4812998
TM		 2859
2860 nfs_invalidate_atime(dir);
2861
3110ff80 2862 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2863 return status;
2864}
2865
2866static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2867 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2868{
2869 struct nfs4_exception exception = { };
2870 int err;
2871 do {
2872 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2873 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2874 pages, count, plus),
1da177e4
LT		 2875 &exception);
2876 } while (exception.retry);
2877 return err;
2878}
2879
2880static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2881 struct iattr *sattr, dev_t rdev)
2882{
57dc9a57
TM		 2883 struct nfs4_createdata *data;
2884 int mode = sattr->ia_mode;
2885 int status = -ENOMEM;
1da177e4
LT		 2886
2887 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2888 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2889
2890 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2891 if (data == NULL)
2892 goto out;
2893
1da177e4 2894 if (S_ISFIFO(mode))
57dc9a57 2895 data->arg.ftype = NF4FIFO;
1da177e4 2896 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2897 data->arg.ftype = NF4BLK;
2898 data->arg.u.device.specdata1 = MAJOR(rdev);
2899 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2900 }
2901 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2902 data->arg.ftype = NF4CHR;
2903 data->arg.u.device.specdata1 = MAJOR(rdev);
2904 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2905 }
1da177e4 2906
57dc9a57
TM		 2907 status = nfs4_do_create(dir, dentry, data);
2908
2909 nfs4_free_createdata(data);
2910out:
1da177e4
LT		 2911 return status;
2912}
2913
2914static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2915 struct iattr *sattr, dev_t rdev)
2916{
2917 struct nfs4_exception exception = { };
2918 int err;
2919 do {
2920 err = nfs4_handle_exception(NFS_SERVER(dir),
2921 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2922 &exception);
2923 } while (exception.retry);
2924 return err;
2925}
2926
2927static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2928 struct nfs_fsstat *fsstat)
2929{
2930 struct nfs4_statfs_arg args = {
2931 .fh = fhandle,
2932 .bitmask = server->attr_bitmask,
2933 };
24ad148a
BH		 2934 struct nfs4_statfs_res res = {
2935 .fsstat = fsstat,
2936 };
1da177e4
LT		 2937 struct rpc_message msg = {
2938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2939 .rpc_argp = &args,
24ad148a 2940 .rpc_resp = &res,
1da177e4
LT		 2941 };
2942
0e574af1 2943 nfs_fattr_init(fsstat->fattr);
cccef3b9 2944 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2945}
2946
2947static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2948{
2949 struct nfs4_exception exception = { };
2950 int err;
2951 do {
2952 err = nfs4_handle_exception(server,
2953 _nfs4_proc_statfs(server, fhandle, fsstat),
2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2960 struct nfs_fsinfo *fsinfo)
2961{
2962 struct nfs4_fsinfo_arg args = {
2963 .fh = fhandle,
2964 .bitmask = server->attr_bitmask,
2965 };
3dda5e43
BH		 2966 struct nfs4_fsinfo_res res = {
2967 .fsinfo = fsinfo,
2968 };
1da177e4
LT		 2969 struct rpc_message msg = {
2970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2971 .rpc_argp = &args,
3dda5e43 2972 .rpc_resp = &res,
1da177e4
LT		 2973 };
2974
cccef3b9 2975 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2976}
2977
2978static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2979{
2980 struct nfs4_exception exception = { };
2981 int err;
2982
2983 do {
2984 err = nfs4_handle_exception(server,
2985 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2986 &exception);
2987 } while (exception.retry);
2988 return err;
2989}
2990
2991static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2992{
0e574af1 2993 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2994 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2995}
2996
2997static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2998 struct nfs_pathconf *pathconf)
2999{
3000 struct nfs4_pathconf_arg args = {
3001 .fh = fhandle,
3002 .bitmask = server->attr_bitmask,
3003 };
d45b2989
BH		 3004 struct nfs4_pathconf_res res = {
3005 .pathconf = pathconf,
3006 };
1da177e4
LT		 3007 struct rpc_message msg = {
3008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3009 .rpc_argp = &args,
d45b2989 3010 .rpc_resp = &res,
1da177e4
LT		 3011 };
3012
3013 /* None of the pathconf attributes are mandatory to implement */
3014 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3015 memset(pathconf, 0, sizeof(*pathconf));
3016 return 0;
3017 }
3018
0e574af1 3019 nfs_fattr_init(pathconf->fattr);
cccef3b9 3020 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3021}
3022
3023static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3024 struct nfs_pathconf *pathconf)
3025{
3026 struct nfs4_exception exception = { };
3027 int err;
3028
3029 do {
3030 err = nfs4_handle_exception(server,
3031 _nfs4_proc_pathconf(server, fhandle, pathconf),
3032 &exception);
3033 } while (exception.retry);
3034 return err;
3035}
3036
ec06c096 3037static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3038{
ec06c096 3039 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3040
f11c88af
AA		 3041 dprintk("--> %s\n", __func__);
3042
14516c3a
TM		 3043 if (!nfs4_sequence_done(task, &data->res.seq_res))
3044 return -EAGAIN;
f11c88af 3045
9e33bed5 3046 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3047 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3048 return -EAGAIN;
1da177e4 3049 }
8850df99
TM		 3050
3051 nfs_invalidate_atime(data->inode);
1da177e4 3052 if (task->tk_status > 0)
ec06c096
TM		 3053 renew_lease(server, data->timestamp);
3054 return 0;
1da177e4
LT		 3055}
3056
bdc7f021 3057static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3058{
1da177e4 3059 data->timestamp = jiffies;
bdc7f021 3060 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3061}
3062
788e7a89 3063static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3064{
1da177e4
LT		 3065 struct inode *inode = data->inode;
3066
14516c3a
TM		 3067 if (!nfs4_sequence_done(task, &data->res.seq_res))
3068 return -EAGAIN;
def6ed7e 3069
9e33bed5 3070 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3071 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3072 return -EAGAIN;
1da177e4 3073 }
4f9838c7 3074 if (task->tk_status >= 0) {
1da177e4 3075 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3076 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3077 }
788e7a89 3078 return 0;
1da177e4
LT		 3079}
3080
bdc7f021 3081static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3082{
bdc7f021
TM		 3083 struct nfs_server *server = NFS_SERVER(data->inode);
3084
a65318bf 3085 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3086 data->res.server = server;
1da177e4
LT		 3087 data->timestamp = jiffies;
3088
bdc7f021 3089 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3090}
3091
788e7a89 3092static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3093{
1da177e4
LT		 3094 struct inode *inode = data->inode;
3095
14516c3a
TM		 3096 if (!nfs4_sequence_done(task, &data->res.seq_res))
3097 return -EAGAIN;
3098
9e33bed5 3099 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3100 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3101 return -EAGAIN;
1da177e4 3102 }
9e08a3c5 3103 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3104 return 0;
1da177e4
LT		 3105}
3106
bdc7f021 3107static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3108{
788e7a89 3109 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3110
a65318bf 3111 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3112 data->res.server = server;
bdc7f021 3113 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3114}
3115
9bc4e3ca
CL		 3116struct nfs4_renewdata {
3117 struct nfs_client *client;
3118 unsigned long timestamp;
3119};
3120
1da177e4
LT		 3121/*
3122 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3123 * standalone procedure for queueing an asynchronous RENEW.
3124 */
9bc4e3ca 3125static void nfs4_renew_release(void *calldata)
dc96aef9 3126{
9bc4e3ca
CL		 3127 struct nfs4_renewdata *data = calldata;
3128 struct nfs_client *clp = data->client;
dc96aef9 3129
0851de06
AB		 3130 if (atomic_read(&clp->cl_count) > 1)
3131 nfs4_schedule_state_renewal(clp);
3132 nfs_put_client(clp);
9bc4e3ca 3133 kfree(data);
dc96aef9
AB		 3134}
3135
9bc4e3ca 3136static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3137{
9bc4e3ca
CL		 3138 struct nfs4_renewdata *data = calldata;
3139 struct nfs_client *clp = data->client;
3140 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3141
3142 if (task->tk_status < 0) {
95baa25c
TM		 3143 /* Unless we're shutting down, schedule state recovery! */
3144 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3145 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3146 return;
3147 }
452e9352 3148 do_renew_lease(clp, timestamp);
1da177e4
LT		 3149}
3150
963d8fe5
TM		 3151static const struct rpc_call_ops nfs4_renew_ops = {
3152 .rpc_call_done = nfs4_renew_done,
dc96aef9 3153 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3154};
3155
adfa6f98 3156int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3157{
3158 struct rpc_message msg = {
3159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3160 .rpc_argp = clp,
b4454fe1 3161 .rpc_cred = cred,
1da177e4 3162 };
9bc4e3ca 3163 struct nfs4_renewdata *data;
1da177e4 3164
0851de06
AB		 3165 if (!atomic_inc_not_zero(&clp->cl_count))
3166 return -EIO;
9bc4e3ca
CL		 3167 data = kmalloc(sizeof(*data), GFP_KERNEL);
3168 if (data == NULL)
3169 return -ENOMEM;
3170 data->client = clp;
3171 data->timestamp = jiffies;
1da177e4 3172 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3173 &nfs4_renew_ops, data);
1da177e4
LT		 3174}
3175
adfa6f98 3176int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3177{
3178 struct rpc_message msg = {
3179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3180 .rpc_argp = clp,
b4454fe1 3181 .rpc_cred = cred,
1da177e4
LT		 3182 };
3183 unsigned long now = jiffies;
3184 int status;
3185
3186 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3187 if (status < 0)
3188 return status;
452e9352 3189 do_renew_lease(clp, now);
1da177e4
LT		 3190 return 0;
3191}
3192
aa1870af
BF		 3193static inline int nfs4_server_supports_acls(struct nfs_server *server)
3194{
3195 return (server->caps & NFS_CAP_ACLS)
3196 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3197 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3198}
3199
3200/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3201 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3202 * the stack.
3203 */
3204#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3205
3206static void buf_to_pages(const void *buf, size_t buflen,
3207 struct page **pages, unsigned int *pgbase)
3208{
3209 const void *p = buf;
3210
3211 *pgbase = offset_in_page(buf);
3212 p -= *pgbase;
3213 while (p < buf + buflen) {
3214 *(pages++) = virt_to_page(p);
3215 p += PAGE_CACHE_SIZE;
3216 }
3217}
3218
e50a1c2e
BF		 3219struct nfs4_cached_acl {
3220 int cached;
3221 size_t len;
3e9d4154 3222 char data[0];
e50a1c2e
BF		 3223};
3224
3225static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3226{
3227 struct nfs_inode *nfsi = NFS_I(inode);
3228
3229 spin_lock(&inode->i_lock);
3230 kfree(nfsi->nfs4_acl);
3231 nfsi->nfs4_acl = acl;
3232 spin_unlock(&inode->i_lock);
3233}
3234
3235static void nfs4_zap_acl_attr(struct inode *inode)
3236{
3237 nfs4_set_cached_acl(inode, NULL);
3238}
3239
3240static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3241{
3242 struct nfs_inode *nfsi = NFS_I(inode);
3243 struct nfs4_cached_acl *acl;
3244 int ret = -ENOENT;
3245
3246 spin_lock(&inode->i_lock);
3247 acl = nfsi->nfs4_acl;
3248 if (acl == NULL)
3249 goto out;
3250 if (buf == NULL) /* user is just asking for length */
3251 goto out_len;
3252 if (acl->cached == 0)
3253 goto out;
3254 ret = -ERANGE; /* see getxattr(2) man page */
3255 if (acl->len > buflen)
3256 goto out;
3257 memcpy(buf, acl->data, acl->len);
3258out_len:
3259 ret = acl->len;
3260out:
3261 spin_unlock(&inode->i_lock);
3262 return ret;
3263}
3264
3265static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3266{
3267 struct nfs4_cached_acl *acl;
3268
3269 if (buf && acl_len <= PAGE_SIZE) {
3270 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3271 if (acl == NULL)
3272 goto out;
3273 acl->cached = 1;
3274 memcpy(acl->data, buf, acl_len);
3275 } else {
3276 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3277 if (acl == NULL)
3278 goto out;
3279 acl->cached = 0;
3280 }
3281 acl->len = acl_len;
3282out:
3283 nfs4_set_cached_acl(inode, acl);
3284}
3285
16b4289c 3286static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3287{
aa1870af
BF		 3288 struct page *pages[NFS4ACL_MAXPAGES];
3289 struct nfs_getaclargs args = {
3290 .fh = NFS_FH(inode),
3291 .acl_pages = pages,
3292 .acl_len = buflen,
3293 };
663c79b3
BH		 3294 struct nfs_getaclres res = {
3295 .acl_len = buflen,
3296 };
e50a1c2e 3297 void *resp_buf;
aa1870af
BF		 3298 struct rpc_message msg = {
3299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3300 .rpc_argp = &args,
663c79b3 3301 .rpc_resp = &res,
aa1870af 3302 };
e50a1c2e 3303 struct page *localpage = NULL;
aa1870af
BF		 3304 int ret;
3305
e50a1c2e
BF		 3306 if (buflen < PAGE_SIZE) {
3307 /* As long as we're doing a round trip to the server anyway,
3308 * let's be prepared for a page of acl data. */
3309 localpage = alloc_page(GFP_KERNEL);
3310 resp_buf = page_address(localpage);
3311 if (localpage == NULL)
3312 return -ENOMEM;
3313 args.acl_pages[0] = localpage;
3314 args.acl_pgbase = 0;
663c79b3 3315 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3316 } else {
3317 resp_buf = buf;
3318 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3319 }
cccef3b9 3320 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3321 if (ret)
3322 goto out_free;
663c79b3
BH		 3323 if (res.acl_len > args.acl_len)
3324 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3325 else
663c79b3 3326 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3327 if (buf) {
3328 ret = -ERANGE;
663c79b3 3329 if (res.acl_len > buflen)
e50a1c2e
BF		 3330 goto out_free;
3331 if (localpage)
663c79b3 3332 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3333 }
663c79b3 3334 ret = res.acl_len;
e50a1c2e
BF		 3335out_free:
3336 if (localpage)
3337 __free_page(localpage);
aa1870af
BF		 3338 return ret;
3339}
3340
16b4289c
TM		 3341static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3342{
3343 struct nfs4_exception exception = { };
3344 ssize_t ret;
3345 do {
3346 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3347 if (ret >= 0)
3348 break;
3349 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3350 } while (exception.retry);
3351 return ret;
3352}
3353
e50a1c2e
BF		 3354static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3355{
3356 struct nfs_server *server = NFS_SERVER(inode);
3357 int ret;
3358
3359 if (!nfs4_server_supports_acls(server))
3360 return -EOPNOTSUPP;
3361 ret = nfs_revalidate_inode(server, inode);
3362 if (ret < 0)
3363 return ret;
08a22b39
AK		 3364 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3365 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3366 ret = nfs4_read_cached_acl(inode, buf, buflen);
3367 if (ret != -ENOENT)
3368 return ret;
3369 return nfs4_get_acl_uncached(inode, buf, buflen);
3370}
3371
16b4289c 3372static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3373{
3374 struct nfs_server *server = NFS_SERVER(inode);
3375 struct page *pages[NFS4ACL_MAXPAGES];
3376 struct nfs_setaclargs arg = {
3377 .fh = NFS_FH(inode),
3378 .acl_pages = pages,
3379 .acl_len = buflen,
3380 };
73c403a9 3381 struct nfs_setaclres res;
4b580ee3
BF		 3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3384 .rpc_argp = &arg,
73c403a9 3385 .rpc_resp = &res,
4b580ee3
BF		 3386 };
3387 int ret;
3388
3389 if (!nfs4_server_supports_acls(server))
3390 return -EOPNOTSUPP;
642ac549 3391 nfs_inode_return_delegation(inode);
4b580ee3 3392 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3393 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
08a22b39
AK		 3394 /*
3395 * Acl update can result in inode attribute update.
3396 * so mark the attribute cache invalid.
3397 */
3398 spin_lock(&inode->i_lock);
3399 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3400 spin_unlock(&inode->i_lock);
f41f7418
TM		 3401 nfs_access_zap_cache(inode);
3402 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3403 return ret;
3404}
3405
16b4289c
TM		 3406static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3407{
3408 struct nfs4_exception exception = { };
3409 int err;
3410 do {
3411 err = nfs4_handle_exception(NFS_SERVER(inode),
3412 __nfs4_proc_set_acl(inode, buf, buflen),
3413 &exception);
3414 } while (exception.retry);
3415 return err;
3416}
3417
1da177e4 3418static int
aa5190d0 3419nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3420{
aa5190d0
TM		 3421 struct nfs_client *clp = server->nfs_client;
3422
3423 if (task->tk_status >= 0)
1da177e4
LT		 3424 return 0;
3425 switch(task->tk_status) {
9e33bed5
TM		 3426 case -NFS4ERR_ADMIN_REVOKED:
3427 case -NFS4ERR_BAD_STATEID:
3428 case -NFS4ERR_OPENMODE:
3429 if (state == NULL)
3430 break;
3431 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3432 goto do_state_recovery;
1da177e4 3433 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3434 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3435 case -NFS4ERR_EXPIRED:
a2c0b9e2 3436 goto do_state_recovery;
4745e315
AA		 3437#if defined(CONFIG_NFS_V4_1)
3438 case -NFS4ERR_BADSESSION:
3439 case -NFS4ERR_BADSLOT:
3440 case -NFS4ERR_BAD_HIGH_SLOT:
3441 case -NFS4ERR_DEADSESSION:
3442 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3443 case -NFS4ERR_SEQ_FALSE_RETRY:
3444 case -NFS4ERR_SEQ_MISORDERED:
3445 dprintk("%s ERROR %d, Reset session\n", __func__,
3446 task->tk_status);
0b9e2d41 3447 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3448 task->tk_status = 0;
3449 return -EAGAIN;
3450#endif /* CONFIG_NFS_V4_1 */
1da177e4 3451 case -NFS4ERR_DELAY:
aa5190d0 3452 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3453 case -NFS4ERR_GRACE:
2c643488 3454 case -EKEYEXPIRED:
1da177e4
LT		 3455 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3456 task->tk_status = 0;
3457 return -EAGAIN;
3458 case -NFS4ERR_OLD_STATEID:
3459 task->tk_status = 0;
3460 return -EAGAIN;
3461 }
3462 task->tk_status = nfs4_map_errors(task->tk_status);
3463 return 0;
a2c0b9e2
TM		 3464do_state_recovery:
3465 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3466 nfs4_schedule_state_recovery(clp);
3467 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3468 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3469 task->tk_status = 0;
3470 return -EAGAIN;
1da177e4
LT		 3471}
3472
bb8b27e5
TM		 3473int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3474 unsigned short port, struct rpc_cred *cred,
3475 struct nfs4_setclientid_res *res)
1da177e4
LT		 3476{
3477 nfs4_verifier sc_verifier;
3478 struct nfs4_setclientid setclientid = {
3479 .sc_verifier = &sc_verifier,
3480 .sc_prog = program,
3481 };
3482 struct rpc_message msg = {
3483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3484 .rpc_argp = &setclientid,
bb8b27e5 3485 .rpc_resp = res,
286d7d6a 3486 .rpc_cred = cred,
1da177e4 3487 };
bc4785cd 3488 __be32 *p;
1da177e4
LT		 3489 int loop = 0;
3490 int status;
3491
bc4785cd 3492 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3493 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3494 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3495
3496 for(;;) {
3497 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3498 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3499 clp->cl_ipaddr,
3500 rpc_peeraddr2str(clp->cl_rpcclient,
3501 RPC_DISPLAY_ADDR),
69dd716c
TM		 3502 rpc_peeraddr2str(clp->cl_rpcclient,
3503 RPC_DISPLAY_PROTO),
78ea323b 3504 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3505 clp->cl_id_uniquifier);
3506 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3507 sizeof(setclientid.sc_netid),
3508 rpc_peeraddr2str(clp->cl_rpcclient,
3509 RPC_DISPLAY_NETID));
1da177e4 3510 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3511 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3512 clp->cl_ipaddr, port >> 8, port & 255);
3513
3514 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3515 if (status != -NFS4ERR_CLID_INUSE)
3516 break;
3517 if (signalled())
3518 break;
3519 if (loop++ & 1)
611c96c8 3520 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3521 else
3522 if (++clp->cl_id_uniquifier == 0)
3523 break;
3524 }
3525 return status;
3526}
3527
bb8b27e5
TM		 3528static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3529 struct nfs4_setclientid_res *arg,
3530 struct rpc_cred *cred)
1da177e4
LT		 3531{
3532 struct nfs_fsinfo fsinfo;
3533 struct rpc_message msg = {
3534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3535 .rpc_argp = arg,
1da177e4 3536 .rpc_resp = &fsinfo,
286d7d6a 3537 .rpc_cred = cred,
1da177e4
LT		 3538 };
3539 unsigned long now;
3540 int status;
3541
3542 now = jiffies;
3543 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3544 if (status == 0) {
3545 spin_lock(&clp->cl_lock);
3546 clp->cl_lease_time = fsinfo.lease_time * HZ;
3547 clp->cl_last_renewal = now;
3548 spin_unlock(&clp->cl_lock);
3549 }
3550 return status;
3551}
3552
bb8b27e5
TM		 3553int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3554 struct nfs4_setclientid_res *arg,
3555 struct rpc_cred *cred)
51581f3b 3556{
77e03677 3557 long timeout = 0;
51581f3b
TM		 3558 int err;
3559 do {
bb8b27e5 3560 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3561 switch (err) {
3562 case 0:
3563 return err;
3564 case -NFS4ERR_RESOURCE:
3565 /* The IBM lawyers misread another document! */
3566 case -NFS4ERR_DELAY:
3567 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3568 }
3569 } while (err == 0);
3570 return err;
3571}
3572
fe650407
TM		 3573struct nfs4_delegreturndata {
3574 struct nfs4_delegreturnargs args;
fa178f29 3575 struct nfs4_delegreturnres res;
fe650407
TM		 3576 struct nfs_fh fh;
3577 nfs4_stateid stateid;
26e976a8 3578 unsigned long timestamp;
fa178f29 3579 struct nfs_fattr fattr;
fe650407
TM		 3580 int rpc_status;
3581};
3582
fe650407
TM		 3583static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3584{
3585 struct nfs4_delegreturndata *data = calldata;
938e1010 3586
14516c3a
TM		 3587 if (!nfs4_sequence_done(task, &data->res.seq_res))
3588 return;
938e1010 3589
79708861
RL		 3590 switch (task->tk_status) {
3591 case -NFS4ERR_STALE_STATEID:
3592 case -NFS4ERR_EXPIRED:
3593 case 0:
fa178f29 3594 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3595 break;
3596 default:
3597 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3598 -EAGAIN) {
3599 nfs_restart_rpc(task, data->res.server->nfs_client);
3600 return;
3601 }
3602 }
3603 data->rpc_status = task->tk_status;
fe650407
TM		 3604}
3605
3606static void nfs4_delegreturn_release(void *calldata)
3607{
fe650407
TM		 3608 kfree(calldata);
3609}
3610
938e1010
AA		 3611#if defined(CONFIG_NFS_V4_1)
3612static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3613{
3614 struct nfs4_delegreturndata *d_data;
3615
3616 d_data = (struct nfs4_delegreturndata *)data;
3617
035168ab 3618 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3619 &d_data->args.seq_args,
3620 &d_data->res.seq_res, 1, task))
3621 return;
3622 rpc_call_start(task);
3623}
3624#endif /* CONFIG_NFS_V4_1 */
3625
c8d149f3 3626static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3627#if defined(CONFIG_NFS_V4_1)
3628 .rpc_call_prepare = nfs4_delegreturn_prepare,
3629#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3630 .rpc_call_done = nfs4_delegreturn_done,
3631 .rpc_release = nfs4_delegreturn_release,
3632};
3633
e6f81075 3634static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3635{
3636 struct nfs4_delegreturndata *data;
fa178f29 3637 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3638 struct rpc_task *task;
5138fde0
TM		 3639 struct rpc_message msg = {
3640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3641 .rpc_cred = cred,
3642 };
c970aa85
TM		 3643 struct rpc_task_setup task_setup_data = {
3644 .rpc_client = server->client,
5138fde0 3645 .rpc_message = &msg,
c970aa85
TM		 3646 .callback_ops = &nfs4_delegreturn_ops,
3647 .flags = RPC_TASK_ASYNC,
3648 };
e6f81075 3649 int status = 0;
fe650407 3650
8535b2be 3651 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3652 if (data == NULL)
3653 return -ENOMEM;
3654 data->args.fhandle = &data->fh;
3655 data->args.stateid = &data->stateid;
fa178f29 3656 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3657 nfs_copy_fh(&data->fh, NFS_FH(inode));
3658 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3659 data->res.fattr = &data->fattr;
3660 data->res.server = server;
5138fde0 3661 nfs_fattr_init(data->res.fattr);
26e976a8 3662 data->timestamp = jiffies;
fe650407
TM		 3663 data->rpc_status = 0;
3664
c970aa85 3665 task_setup_data.callback_data = data;
1174dd1f
TM		 3666 msg.rpc_argp = &data->args;
3667 msg.rpc_resp = &data->res;
c970aa85 3668 task = rpc_run_task(&task_setup_data);
7a1218a2 3669 if (IS_ERR(task))
fe650407 3670 return PTR_ERR(task);
e6f81075
TM		 3671 if (!issync)
3672 goto out;
fe650407 3673 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3674 if (status != 0)
3675 goto out;
3676 status = data->rpc_status;
3677 if (status != 0)
3678 goto out;
3679 nfs_refresh_inode(inode, &data->fattr);
3680out:
e6b3c4db 3681 rpc_put_task(task);
fe650407 3682 return status;
1da177e4
LT		 3683}
3684
e6f81075 3685int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3686{
3687 struct nfs_server *server = NFS_SERVER(inode);
3688 struct nfs4_exception exception = { };
3689 int err;
3690 do {
e6f81075 3691 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3692 switch (err) {
3693 case -NFS4ERR_STALE_STATEID:
3694 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3695 case 0:
3696 return 0;
3697 }
3698 err = nfs4_handle_exception(server, err, &exception);
3699 } while (exception.retry);
3700 return err;
3701}
3702
3703#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3704#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3705
3706/*
3707 * sleep, with exponential backoff, and retry the LOCK operation.
3708 */
3709static unsigned long
3710nfs4_set_lock_task_retry(unsigned long timeout)
3711{
150030b7 3712 schedule_timeout_killable(timeout);
1da177e4
LT		 3713 timeout <<= 1;
3714 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3715 return NFS4_LOCK_MAXTIMEOUT;
3716 return timeout;
3717}
3718
1da177e4
LT		 3719static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3720{
3721 struct inode *inode = state->inode;
3722 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3723 struct nfs_client *clp = server->nfs_client;
911d1aaf 3724 struct nfs_lockt_args arg = {
1da177e4 3725 .fh = NFS_FH(inode),
911d1aaf 3726 .fl = request,
1da177e4 3727 };
911d1aaf
TM		 3728 struct nfs_lockt_res res = {
3729 .denied = request,
1da177e4
LT		 3730 };
3731 struct rpc_message msg = {
3732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3733 .rpc_argp = &arg,
3734 .rpc_resp = &res,
3735 .rpc_cred = state->owner->so_cred,
3736 };
1da177e4
LT		 3737 struct nfs4_lock_state *lsp;
3738 int status;
3739
911d1aaf 3740 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3741 status = nfs4_set_lock_state(state, request);
3742 if (status != 0)
3743 goto out;
3744 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3745 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3746 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3747 switch (status) {
3748 case 0:
3749 request->fl_type = F_UNLCK;
3750 break;
3751 case -NFS4ERR_DENIED:
3752 status = 0;
1da177e4 3753 }
70cc6487 3754 request->fl_ops->fl_release_private(request);
8d0a8a9d 3755out:
1da177e4
LT		 3756 return status;
3757}
3758
3759static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3760{
3761 struct nfs4_exception exception = { };
3762 int err;
3763
3764 do {
3765 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3766 _nfs4_proc_getlk(state, cmd, request),
3767 &exception);
3768 } while (exception.retry);
3769 return err;
3770}
3771
3772static int do_vfs_lock(struct file *file, struct file_lock *fl)
3773{
3774 int res = 0;
3775 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3776 case FL_POSIX:
3777 res = posix_lock_file_wait(file, fl);
3778 break;
3779 case FL_FLOCK:
3780 res = flock_lock_file_wait(file, fl);
3781 break;
3782 default:
3783 BUG();
3784 }
1da177e4
LT		 3785 return res;
3786}
3787
faf5f49c 3788struct nfs4_unlockdata {
911d1aaf
TM		 3789 struct nfs_locku_args arg;
3790 struct nfs_locku_res res;
faf5f49c
TM		 3791 struct nfs4_lock_state *lsp;
3792 struct nfs_open_context *ctx;
911d1aaf
TM		 3793 struct file_lock fl;
3794 const struct nfs_server *server;
26e976a8 3795 unsigned long timestamp;
faf5f49c
TM		 3796};
3797
911d1aaf
TM		 3798static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3799 struct nfs_open_context *ctx,
3800 struct nfs4_lock_state *lsp,
3801 struct nfs_seqid *seqid)
3802{
3803 struct nfs4_unlockdata *p;
3804 struct inode *inode = lsp->ls_state->inode;
3805
8535b2be 3806 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3807 if (p == NULL)
3808 return NULL;
3809 p->arg.fh = NFS_FH(inode);
3810 p->arg.fl = &p->fl;
3811 p->arg.seqid = seqid;
c1d51931 3812 p->res.seqid = seqid;
911d1aaf
TM		 3813 p->arg.stateid = &lsp->ls_stateid;
3814 p->lsp = lsp;
3815 atomic_inc(&lsp->ls_count);
3816 /* Ensure we don't close file until we're done freeing locks! */
3817 p->ctx = get_nfs_open_context(ctx);
3818 memcpy(&p->fl, fl, sizeof(p->fl));
3819 p->server = NFS_SERVER(inode);
3820 return p;
3821}
3822
06f814a3 3823static void nfs4_locku_release_calldata(void *data)
faf5f49c 3824{
963d8fe5 3825 struct nfs4_unlockdata *calldata = data;
911d1aaf 3826 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3827 nfs4_put_lock_state(calldata->lsp);
3828 put_nfs_open_context(calldata->ctx);
3829 kfree(calldata);
faf5f49c
TM		 3830}
3831
963d8fe5 3832static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3833{
963d8fe5 3834 struct nfs4_unlockdata *calldata = data;
faf5f49c 3835
14516c3a
TM		 3836 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3837 return;
faf5f49c
TM		 3838 switch (task->tk_status) {
3839 case 0:
3840 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3841 calldata->res.stateid.data,
faf5f49c 3842 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3843 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3844 break;
9e33bed5
TM		 3845 case -NFS4ERR_BAD_STATEID:
3846 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3847 case -NFS4ERR_STALE_STATEID:
3848 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3849 break;
3850 default:
9e33bed5 3851 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3852 nfs_restart_rpc(task,
d61e612a 3853 calldata->server->nfs_client);
faf5f49c 3854 }
faf5f49c
TM		 3855}
3856
4ce70ada 3857static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3858{
4ce70ada 3859 struct nfs4_unlockdata *calldata = data;
faf5f49c 3860
911d1aaf 3861 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3862 return;
3863 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3864 /* Note: exit _without_ running nfs4_locku_done */
3865 task->tk_action = NULL;
faf5f49c
TM		 3866 return;
3867 }
26e976a8 3868 calldata->timestamp = jiffies;
035168ab 3869 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3870 &calldata->arg.seq_args,
3871 &calldata->res.seq_res, 1, task))
3872 return;
5138fde0 3873 rpc_call_start(task);
faf5f49c
TM		 3874}
3875
963d8fe5 3876static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3877 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3878 .rpc_call_done = nfs4_locku_done,
06f814a3 3879 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3880};
3881
a5d16a4d
TM		 3882static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3883 struct nfs_open_context *ctx,
3884 struct nfs4_lock_state *lsp,
3885 struct nfs_seqid *seqid)
3886{
3887 struct nfs4_unlockdata *data;
5138fde0
TM		 3888 struct rpc_message msg = {
3889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3890 .rpc_cred = ctx->cred,
3891 };
c970aa85
TM		 3892 struct rpc_task_setup task_setup_data = {
3893 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3894 .rpc_message = &msg,
c970aa85 3895 .callback_ops = &nfs4_locku_ops,
101070ca 3896 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3897 .flags = RPC_TASK_ASYNC,
3898 };
a5d16a4d 3899
137d6aca
FF		 3900 /* Ensure this is an unlock - when canceling a lock, the
3901 * canceled lock is passed in, and it won't be an unlock.
3902 */
3903 fl->fl_type = F_UNLCK;
3904
a5d16a4d
TM		 3905 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3906 if (data == NULL) {
3907 nfs_free_seqid(seqid);
3908 return ERR_PTR(-ENOMEM);
3909 }
3910
1174dd1f
TM		 3911 msg.rpc_argp = &data->arg;
3912 msg.rpc_resp = &data->res;
c970aa85
TM		 3913 task_setup_data.callback_data = data;
3914 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3915}
3916
faf5f49c
TM		 3917static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3918{
19e03c57 3919 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3920 struct nfs_seqid *seqid;
1da177e4 3921 struct nfs4_lock_state *lsp;
06f814a3
TM		 3922 struct rpc_task *task;
3923 int status = 0;
536ff0f8 3924 unsigned char fl_flags = request->fl_flags;
faf5f49c 3925
8d0a8a9d 3926 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3927 /* Unlock _before_ we do the RPC call */
3928 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3929 down_read(&nfsi->rwsem);
3930 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3931 up_read(&nfsi->rwsem);
9b073574 3932 goto out;
19e03c57
TM		 3933 }
3934 up_read(&nfsi->rwsem);
8d0a8a9d 3935 if (status != 0)
9b073574
TM		 3936 goto out;
3937 /* Is this a delegated lock? */
3938 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3939 goto out;
8d0a8a9d 3940 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 3941 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 3942 status = -ENOMEM;
911d1aaf 3943 if (seqid == NULL)
9b073574 3944 goto out;
cd3758e3 3945 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3946 status = PTR_ERR(task);
3947 if (IS_ERR(task))
9b073574 3948 goto out;
a5d16a4d 3949 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3950 rpc_put_task(task);
9b073574 3951out:
536ff0f8 3952 request->fl_flags = fl_flags;
1da177e4
LT		 3953 return status;
3954}
3955
a5d16a4d
TM		 3956struct nfs4_lockdata {
3957 struct nfs_lock_args arg;
3958 struct nfs_lock_res res;
3959 struct nfs4_lock_state *lsp;
3960 struct nfs_open_context *ctx;
3961 struct file_lock fl;
26e976a8 3962 unsigned long timestamp;
a5d16a4d
TM		 3963 int rpc_status;
3964 int cancelled;
66179efe 3965 struct nfs_server *server;
a5d16a4d
TM		 3966};
3967
3968static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 3969 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
3970 gfp_t gfp_mask)
1da177e4 3971{
a5d16a4d
TM		 3972 struct nfs4_lockdata *p;
3973 struct inode *inode = lsp->ls_state->inode;
1da177e4 3974 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 3975
8535b2be 3976 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 3977 if (p == NULL)
3978 return NULL;
3979
3980 p->arg.fh = NFS_FH(inode);
3981 p->arg.fl = &p->fl;
8535b2be 3982 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 3983 if (p->arg.open_seqid == NULL)
3984 goto out_free;
8535b2be 3985 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 3986 if (p->arg.lock_seqid == NULL)
2f74c0a0 3987 goto out_free_seqid;
a5d16a4d 3988 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3989 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3990 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3991 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 3992 p->lsp = lsp;
66179efe 3993 p->server = server;
a5d16a4d
TM		 3994 atomic_inc(&lsp->ls_count);
3995 p->ctx = get_nfs_open_context(ctx);
3996 memcpy(&p->fl, fl, sizeof(p->fl));
3997 return p;
2f74c0a0
TM		 3998out_free_seqid:
3999 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4000out_free:
4001 kfree(p);
4002 return NULL;
4003}
4004
4005static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4006{
4007 struct nfs4_lockdata *data = calldata;
4008 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4009
3110ff80 4010 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4011 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4012 return;
a5d16a4d
TM		 4013 /* Do we need to do an open_to_lock_owner? */
4014 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4015 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4016 return;
a5d16a4d
TM		 4017 data->arg.open_stateid = &state->stateid;
4018 data->arg.new_lock_owner = 1;
c1d51931 4019 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4020 } else
4021 data->arg.new_lock_owner = 0;
26e976a8 4022 data->timestamp = jiffies;
035168ab
TM		 4023 if (nfs4_setup_sequence(data->server,
4024 &data->arg.seq_args,
66179efe
AA		 4025 &data->res.seq_res, 1, task))
4026 return;
5138fde0 4027 rpc_call_start(task);
3110ff80 4028 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4029}
4030
b257957e
AB		 4031static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4032{
4033 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4034 nfs4_lock_prepare(task, calldata);
4035}
4036
a5d16a4d
TM		 4037static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4038{
4039 struct nfs4_lockdata *data = calldata;
4040
3110ff80 4041 dprintk("%s: begin!\n", __func__);
a5d16a4d 4042
14516c3a
TM		 4043 if (!nfs4_sequence_done(task, &data->res.seq_res))
4044 return;
66179efe 4045
a5d16a4d 4046 data->rpc_status = task->tk_status;
a5d16a4d 4047 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4048 if (data->rpc_status == 0)
4049 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4050 else
4051 goto out;
4052 }
4053 if (data->rpc_status == 0) {
4054 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4055 sizeof(data->lsp->ls_stateid.data));
4056 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4057 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4058 }
a5d16a4d 4059out:
3110ff80 4060 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4061}
4062
4063static void nfs4_lock_release(void *calldata)
4064{
4065 struct nfs4_lockdata *data = calldata;
4066
3110ff80 4067 dprintk("%s: begin!\n", __func__);
2f74c0a0 4068 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4069 if (data->cancelled != 0) {
4070 struct rpc_task *task;
4071 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4072 data->arg.lock_seqid);
4073 if (!IS_ERR(task))
e6b3c4db 4074 rpc_put_task(task);
3110ff80 4075 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4076 } else
4077 nfs_free_seqid(data->arg.lock_seqid);
4078 nfs4_put_lock_state(data->lsp);
4079 put_nfs_open_context(data->ctx);
4080 kfree(data);
3110ff80 4081 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4082}
4083
4084static const struct rpc_call_ops nfs4_lock_ops = {
4085 .rpc_call_prepare = nfs4_lock_prepare,
4086 .rpc_call_done = nfs4_lock_done,
4087 .rpc_release = nfs4_lock_release,
4088};
4089
b257957e
AB		 4090static const struct rpc_call_ops nfs4_recover_lock_ops = {
4091 .rpc_call_prepare = nfs4_recover_lock_prepare,
4092 .rpc_call_done = nfs4_lock_done,
4093 .rpc_release = nfs4_lock_release,
4094};
4095
2bee72a6
TM		 4096static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4097{
4098 struct nfs_client *clp = server->nfs_client;
4099 struct nfs4_state *state = lsp->ls_state;
4100
4101 switch (error) {
4102 case -NFS4ERR_ADMIN_REVOKED:
4103 case -NFS4ERR_BAD_STATEID:
4104 case -NFS4ERR_EXPIRED:
4105 if (new_lock_owner != 0 ||
4106 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4107 nfs4_state_mark_reclaim_nograce(clp, state);
4108 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4109 break;
4110 case -NFS4ERR_STALE_STATEID:
4111 if (new_lock_owner != 0 ||
4112 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4113 nfs4_state_mark_reclaim_reboot(clp, state);
4114 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4115 };
4116}
4117
afe6c27c 4118static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4119{
4120 struct nfs4_lockdata *data;
4121 struct rpc_task *task;
5138fde0
TM		 4122 struct rpc_message msg = {
4123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4124 .rpc_cred = state->owner->so_cred,
4125 };
c970aa85
TM		 4126 struct rpc_task_setup task_setup_data = {
4127 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4128 .rpc_message = &msg,
c970aa85 4129 .callback_ops = &nfs4_lock_ops,
101070ca 4130 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4131 .flags = RPC_TASK_ASYNC,
4132 };
a5d16a4d
TM		 4133 int ret;
4134
3110ff80 4135 dprintk("%s: begin!\n", __func__);
cd3758e3 4136 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4137 fl->fl_u.nfs4_fl.owner,
4138 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4139 if (data == NULL)
4140 return -ENOMEM;
4141 if (IS_SETLKW(cmd))
4142 data->arg.block = 1;
b257957e
AB		 4143 if (recovery_type > NFS_LOCK_NEW) {
4144 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4145 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4146 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4147 }
1174dd1f
TM		 4148 msg.rpc_argp = &data->arg;
4149 msg.rpc_resp = &data->res;
c970aa85
TM		 4150 task_setup_data.callback_data = data;
4151 task = rpc_run_task(&task_setup_data);
7a1218a2 4152 if (IS_ERR(task))
a5d16a4d 4153 return PTR_ERR(task);
a5d16a4d
TM		 4154 ret = nfs4_wait_for_completion_rpc_task(task);
4155 if (ret == 0) {
4156 ret = data->rpc_status;
2bee72a6
TM		 4157 if (ret)
4158 nfs4_handle_setlk_error(data->server, data->lsp,
4159 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4160 } else
4161 data->cancelled = 1;
e6b3c4db 4162 rpc_put_task(task);
3110ff80 4163 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4164 return ret;
1da177e4
LT		 4165}
4166
4167static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4168{
202b50dc
TM		 4169 struct nfs_server *server = NFS_SERVER(state->inode);
4170 struct nfs4_exception exception = { };
4171 int err;
4172
4173 do {
42a2d13e
TM		 4174 /* Cache the lock if possible... */
4175 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4176 return 0;
afe6c27c 4177 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4178 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4179 break;
4180 nfs4_handle_exception(server, err, &exception);
4181 } while (exception.retry);
4182 return err;
1da177e4
LT		 4183}
4184
4185static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4186{
202b50dc
TM		 4187 struct nfs_server *server = NFS_SERVER(state->inode);
4188 struct nfs4_exception exception = { };
4189 int err;
4190
6bfc93ef
TM		 4191 err = nfs4_set_lock_state(state, request);
4192 if (err != 0)
4193 return err;
202b50dc 4194 do {
42a2d13e
TM		 4195 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4196 return 0;
afe6c27c 4197 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4198 switch (err) {
4199 default:
4200 goto out;
4201 case -NFS4ERR_GRACE:
4202 case -NFS4ERR_DELAY:
4203 nfs4_handle_exception(server, err, &exception);
4204 err = 0;
4205 }
202b50dc 4206 } while (exception.retry);
a9ed2e25 4207out:
202b50dc 4208 return err;
1da177e4
LT		 4209}
4210
4211static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4212{
19e03c57 4213 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4214 unsigned char fl_flags = request->fl_flags;
8e469ebd 4215 int status = -ENOLCK;
1da177e4 4216
8e469ebd
TM		 4217 if ((fl_flags & FL_POSIX) &&
4218 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4219 goto out;
6bfc93ef 4220 /* Is this a delegated open? */
6bfc93ef
TM		 4221 status = nfs4_set_lock_state(state, request);
4222 if (status != 0)
4223 goto out;
01c3b861
TM		 4224 request->fl_flags |= FL_ACCESS;
4225 status = do_vfs_lock(request->fl_file, request);
4226 if (status < 0)
4227 goto out;
19e03c57 4228 down_read(&nfsi->rwsem);
01c3b861 4229 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4230 /* Yes: cache locks! */
01c3b861 4231 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4232 request->fl_flags = fl_flags & ~FL_SLEEP;
4233 status = do_vfs_lock(request->fl_file, request);
4234 goto out_unlock;
01c3b861 4235 }
afe6c27c 4236 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4237 if (status != 0)
01c3b861 4238 goto out_unlock;
6bfc93ef 4239 /* Note: we always want to sleep here! */
01c3b861 4240 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4241 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4242 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4243out_unlock:
19e03c57 4244 up_read(&nfsi->rwsem);
01c3b861
TM		 4245out:
4246 request->fl_flags = fl_flags;
1da177e4
LT		 4247 return status;
4248}
4249
4250static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4251{
4252 struct nfs4_exception exception = { };
4253 int err;
4254
4255 do {
965b5d67
TM		 4256 err = _nfs4_proc_setlk(state, cmd, request);
4257 if (err == -NFS4ERR_DENIED)
4258 err = -EAGAIN;
1da177e4 4259 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4260 err, &exception);
1da177e4
LT		 4261 } while (exception.retry);
4262 return err;
4263}
4264
4265static int
4266nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4267{
4268 struct nfs_open_context *ctx;
4269 struct nfs4_state *state;
4270 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4271 int status;
4272
4273 /* verify open state */
cd3758e3 4274 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4275 state = ctx->state;
4276
4277 if (request->fl_start < 0 || request->fl_end < 0)
4278 return -EINVAL;
4279
d953126a
TM		 4280 if (IS_GETLK(cmd)) {
4281 if (state != NULL)
4282 return nfs4_proc_getlk(state, F_GETLK, request);
4283 return 0;
4284 }
1da177e4
LT		 4285
4286 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4287 return -EINVAL;
4288
d953126a
TM		 4289 if (request->fl_type == F_UNLCK) {
4290 if (state != NULL)
4291 return nfs4_proc_unlck(state, cmd, request);
4292 return 0;
4293 }
1da177e4 4294
d953126a
TM		 4295 if (state == NULL)
4296 return -ENOLCK;
1da177e4
LT		 4297 do {
4298 status = nfs4_proc_setlk(state, cmd, request);
4299 if ((status != -EAGAIN) || IS_SETLK(cmd))
4300 break;
4301 timeout = nfs4_set_lock_task_retry(timeout);
4302 status = -ERESTARTSYS;
4303 if (signalled())
4304 break;
4305 } while(status < 0);
1da177e4
LT		 4306 return status;
4307}
4308
888e694c
TM		 4309int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4310{
4311 struct nfs_server *server = NFS_SERVER(state->inode);
4312 struct nfs4_exception exception = { };
4313 int err;
4314
4315 err = nfs4_set_lock_state(state, fl);
4316 if (err != 0)
4317 goto out;
4318 do {
afe6c27c 4319 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4320 switch (err) {
4321 default:
4322 printk(KERN_ERR "%s: unhandled error %d.\n",
4323 __func__, err);
4324 case 0:
965b5d67 4325 case -ESTALE:
d5122201
TM		 4326 goto out;
4327 case -NFS4ERR_EXPIRED:
4328 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4329 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4330 case -NFS4ERR_BADSESSION:
4331 case -NFS4ERR_BADSLOT:
4332 case -NFS4ERR_BAD_HIGH_SLOT:
4333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4334 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4335 nfs4_schedule_state_recovery(server->nfs_client);
4336 goto out;
965b5d67
TM		 4337 case -ERESTARTSYS:
4338 /*
4339 * The show must go on: exit, but mark the
4340 * stateid as needing recovery.
4341 */
4342 case -NFS4ERR_ADMIN_REVOKED:
4343 case -NFS4ERR_BAD_STATEID:
4344 case -NFS4ERR_OPENMODE:
4345 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4346 err = 0;
4347 goto out;
168667c4
TM		 4348 case -EKEYEXPIRED:
4349 /*
4350 * User RPCSEC_GSS context has expired.
4351 * We cannot recover this stateid now, so
4352 * skip it and allow recovery thread to
4353 * proceed.
4354 */
4355 err = 0;
4356 goto out;
965b5d67
TM		 4357 case -ENOMEM:
4358 case -NFS4ERR_DENIED:
4359 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4360 err = 0;
4361 goto out;
d5122201
TM		 4362 case -NFS4ERR_DELAY:
4363 break;
4364 }
888e694c
TM		 4365 err = nfs4_handle_exception(server, err, &exception);
4366 } while (exception.retry);
4367out:
4368 return err;
4369}
6b3b5496 4370
d3c7b7cc
TM		 4371static void nfs4_release_lockowner_release(void *calldata)
4372{
4373 kfree(calldata);
4374}
4375
4376const struct rpc_call_ops nfs4_release_lockowner_ops = {
4377 .rpc_release = nfs4_release_lockowner_release,
4378};
4379
4380void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4381{
4382 struct nfs_server *server = lsp->ls_state->owner->so_server;
4383 struct nfs_release_lockowner_args *args;
4384 struct rpc_message msg = {
4385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4386 };
4387
4388 if (server->nfs_client->cl_mvops->minor_version != 0)
4389 return;
4390 args = kmalloc(sizeof(*args), GFP_NOFS);
4391 if (!args)
4392 return;
4393 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4394 args->lock_owner.id = lsp->ls_id.id;
4395 msg.rpc_argp = args;
4396 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4397}
4398
aa1870af
BF		 4399#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4400
6b3b5496
BF		 4401int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4402 size_t buflen, int flags)
4403{
4b580ee3
BF		 4404 struct inode *inode = dentry->d_inode;
4405
4406 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4407 return -EOPNOTSUPP;
4408
4b580ee3 4409 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4410}
4411
4412/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4413 * and that's what we'll do for e.g. user attributes that haven't been set.
4414 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4415 * attributes in kernel-managed attribute namespaces. */
4416ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4417 size_t buflen)
4418{
aa1870af
BF		 4419 struct inode *inode = dentry->d_inode;
4420
4421 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4422 return -EOPNOTSUPP;
4423
4424 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4425}
4426
4427ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4428{
aa1870af 4429 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4430
096455a2
BF		 4431 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4432 return 0;
6b3b5496
BF		 4433 if (buf && buflen < len)
4434 return -ERANGE;
4435 if (buf)
aa1870af
BF		 4436 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4437 return len;
6b3b5496
BF		 4438}
4439
69aaaae1
TM		 4440static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4441{
4442 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4443 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4444 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4445 return;
4446
4447 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4448 NFS_ATTR_FATTR_NLINK;
4449 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4450 fattr->nlink = 2;
4451}
4452
56659e99 4453int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4454 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4455{
4456 struct nfs_server *server = NFS_SERVER(dir);
4457 u32 bitmask[2] = {
361e624f
MN		 4458 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4459 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4460 };
4461 struct nfs4_fs_locations_arg args = {
4462 .dir_fh = NFS_FH(dir),
c228fd3a 4463 .name = name,
683b57b4
TM		 4464 .page = page,
4465 .bitmask = bitmask,
4466 };
22958463
BH		 4467 struct nfs4_fs_locations_res res = {
4468 .fs_locations = fs_locations,
4469 };
683b57b4
TM		 4470 struct rpc_message msg = {
4471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4472 .rpc_argp = &args,
22958463 4473 .rpc_resp = &res,
683b57b4
TM		 4474 };
4475 int status;
4476
3110ff80 4477 dprintk("%s: start\n", __func__);
c228fd3a 4478 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4479 fs_locations->server = server;
830b8e33 4480 fs_locations->nlocations = 0;
cccef3b9 4481 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4482 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4483 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4484 return status;
4485}
4486
557134a3 4487#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4488/*
4489 * nfs4_proc_exchange_id()
4490 *
4491 * Since the clientid has expired, all compounds using sessions
4492 * associated with the stale clientid will be returning
4493 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4494 * be in some phase of session reset.
4495 */
4d643d1d 4496int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4497{
4498 nfs4_verifier verifier;
4499 struct nfs41_exchange_id_args args = {
4500 .client = clp,
4501 .flags = clp->cl_exchange_flags,
4502 };
4503 struct nfs41_exchange_id_res res = {
4504 .client = clp,
4505 };
4506 int status;
4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4509 .rpc_argp = &args,
4510 .rpc_resp = &res,
4511 .rpc_cred = cred,
4512 };
4513 __be32 *p;
4514
4515 dprintk("--> %s\n", __func__);
4516 BUG_ON(clp == NULL);
a7b72103 4517
7b183d0d
AB		 4518 /* Remove server-only flags */
4519 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4520
99fe60d0
BH		 4521 p = (u32 *)verifier.data;
4522 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4523 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4524 args.verifier = &verifier;
4525
4526 while (1) {
4527 args.id_len = scnprintf(args.id, sizeof(args.id),
4528 "%s/%s %u",
4529 clp->cl_ipaddr,
4530 rpc_peeraddr2str(clp->cl_rpcclient,
4531 RPC_DISPLAY_ADDR),
4532 clp->cl_id_uniquifier);
4533
4534 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4535
180b62a3 4536 if (status != -NFS4ERR_CLID_INUSE)
99fe60d0
BH		 4537 break;
4538
4539 if (signalled())
4540 break;
4541
4542 if (++clp->cl_id_uniquifier == 0)
4543 break;
4544 }
4545
4546 dprintk("<-- %s status= %d\n", __func__, status);
4547 return status;
4548}
4549
2050f0cc
AA		 4550struct nfs4_get_lease_time_data {
4551 struct nfs4_get_lease_time_args *args;
4552 struct nfs4_get_lease_time_res *res;
4553 struct nfs_client *clp;
4554};
4555
4556static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4557 void *calldata)
4558{
4559 int ret;
4560 struct nfs4_get_lease_time_data *data =
4561 (struct nfs4_get_lease_time_data *)calldata;
4562
4563 dprintk("--> %s\n", __func__);
689cf5c1 4564 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4565 /* just setup sequence, do not trigger session recovery
4566 since we're invoked within one */
4567 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4568 &data->args->la_seq_args,
4569 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4570
4571 BUG_ON(ret == -EAGAIN);
4572 rpc_call_start(task);
4573 dprintk("<-- %s\n", __func__);
4574}
4575
4576/*
4577 * Called from nfs4_state_manager thread for session setup, so don't recover
4578 * from sequence operation or clientid errors.
4579 */
4580static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4581{
4582 struct nfs4_get_lease_time_data *data =
4583 (struct nfs4_get_lease_time_data *)calldata;
4584
4585 dprintk("--> %s\n", __func__);
14516c3a
TM		 4586 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4587 return;
2050f0cc
AA		 4588 switch (task->tk_status) {
4589 case -NFS4ERR_DELAY:
4590 case -NFS4ERR_GRACE:
4591 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4592 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4593 task->tk_status = 0;
0110ee15 4594 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4595 return;
4596 }
2050f0cc
AA		 4597 dprintk("<-- %s\n", __func__);
4598}
4599
4600struct rpc_call_ops nfs4_get_lease_time_ops = {
4601 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4602 .rpc_call_done = nfs4_get_lease_time_done,
4603};
4604
4605int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4606{
4607 struct rpc_task *task;
4608 struct nfs4_get_lease_time_args args;
4609 struct nfs4_get_lease_time_res res = {
4610 .lr_fsinfo = fsinfo,
4611 };
4612 struct nfs4_get_lease_time_data data = {
4613 .args = &args,
4614 .res = &res,
4615 .clp = clp,
4616 };
4617 struct rpc_message msg = {
4618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4619 .rpc_argp = &args,
4620 .rpc_resp = &res,
4621 };
4622 struct rpc_task_setup task_setup = {
4623 .rpc_client = clp->cl_rpcclient,
4624 .rpc_message = &msg,
4625 .callback_ops = &nfs4_get_lease_time_ops,
4626 .callback_data = &data
4627 };
4628 int status;
4629
2050f0cc
AA		 4630 dprintk("--> %s\n", __func__);
4631 task = rpc_run_task(&task_setup);
4632
4633 if (IS_ERR(task))
4634 status = PTR_ERR(task);
4635 else {
4636 status = task->tk_status;
4637 rpc_put_task(task);
4638 }
4639 dprintk("<-- %s return %d\n", __func__, status);
4640
4641 return status;
4642}
4643
b73dafa7
RL		 4644/*
4645 * Reset a slot table
4646 */
104aeba4
AA		 4647static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4648 int ivalue)
ac72b7b3 4649{
104aeba4 4650 struct nfs4_slot *new = NULL;
b73dafa7 4651 int i;
ac72b7b3
AA		 4652 int ret = 0;
4653
104aeba4
AA		 4654 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4655 max_reqs, tbl->max_slots);
ac72b7b3 4656
104aeba4
AA		 4657 /* Does the newly negotiated max_reqs match the existing slot table? */
4658 if (max_reqs != tbl->max_slots) {
4659 ret = -ENOMEM;
4660 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4661 GFP_NOFS);
104aeba4
AA		 4662 if (!new)
4663 goto out;
4664 ret = 0;
4665 kfree(tbl->slots);
ac72b7b3
AA		 4666 }
4667 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4668 if (new) {
4669 tbl->slots = new;
4670 tbl->max_slots = max_reqs;
4671 }
4672 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4673 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4674 spin_unlock(&tbl->slot_tbl_lock);
4675 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4676 tbl, tbl->slots, tbl->max_slots);
4677out:
4678 dprintk("<-- %s: return %d\n", __func__, ret);
4679 return ret;
4680}
4681
b73dafa7
RL		 4682/*
4683 * Reset the forechannel and backchannel slot tables
4684 */
4685static int nfs4_reset_slot_tables(struct nfs4_session *session)
4686{
4687 int status;
4688
4689 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4690 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4691 if (status)
4692 return status;
4693
4694 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4695 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4696 return status;
4697}
4698
f8625a6a
RL		 4699/* Destroy the slot table */
4700static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4701{
4702 if (session->fc_slot_table.slots != NULL) {
4703 kfree(session->fc_slot_table.slots);
4704 session->fc_slot_table.slots = NULL;
4705 }
4706 if (session->bc_slot_table.slots != NULL) {
4707 kfree(session->bc_slot_table.slots);
4708 session->bc_slot_table.slots = NULL;
4709 }
4710 return;
4711}
4712
fc931582
AA		 4713/*
4714 * Initialize slot table
4715 */
050047ce
RL		 4716static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4717 int max_slots, int ivalue)
fc931582 4718{
fc931582
AA		 4719 struct nfs4_slot *slot;
4720 int ret = -ENOMEM;
4721
4722 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4723
050047ce 4724 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4725
8535b2be 4726 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4727 if (!slot)
4728 goto out;
fc931582
AA		 4729 ret = 0;
4730
4731 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4732 tbl->max_slots = max_slots;
4733 tbl->slots = slot;
4734 tbl->highest_used_slotid = -1; /* no slot is currently used */
4735 spin_unlock(&tbl->slot_tbl_lock);
4736 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4737 tbl, tbl->slots, tbl->max_slots);
4738out:
4739 dprintk("<-- %s: return %d\n", __func__, ret);
4740 return ret;
fc931582
AA		 4741}
4742
050047ce
RL		 4743/*
4744 * Initialize the forechannel and backchannel tables
4745 */
4746static int nfs4_init_slot_tables(struct nfs4_session *session)
4747{
f26468fb
TM		 4748 struct nfs4_slot_table *tbl;
4749 int status = 0;
050047ce 4750
f26468fb
TM		 4751 tbl = &session->fc_slot_table;
4752 if (tbl->slots == NULL) {
4753 status = nfs4_init_slot_table(tbl,
4754 session->fc_attrs.max_reqs, 1);
4755 if (status)
4756 return status;
4757 }
050047ce 4758
f26468fb
TM		 4759 tbl = &session->bc_slot_table;
4760 if (tbl->slots == NULL) {
4761 status = nfs4_init_slot_table(tbl,
4762 session->bc_attrs.max_reqs, 0);
4763 if (status)
4764 nfs4_destroy_slot_tables(session);
4765 }
f8625a6a
RL		 4766
4767 return status;
557134a3
AA		 4768}
4769
4770struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4771{
4772 struct nfs4_session *session;
4773 struct nfs4_slot_table *tbl;
4774
8535b2be 4775 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4776 if (!session)
4777 return NULL;
76db6d95 4778
ea028ac9 4779 init_completion(&session->complete);
76db6d95 4780
557134a3 4781 tbl = &session->fc_slot_table;
9dfdf404 4782 tbl->highest_used_slotid = -1;
557134a3 4783 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4784 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
f8625a6a
RL		 4785
4786 tbl = &session->bc_slot_table;
9dfdf404 4787 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4788 spin_lock_init(&tbl->slot_tbl_lock);
4789 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4790
1055d76d
TM		 4791 session->session_state = 1<<NFS4_SESSION_INITING;
4792
557134a3
AA		 4793 session->clp = clp;
4794 return session;
4795}
4796
4797void nfs4_destroy_session(struct nfs4_session *session)
4798{
5a0ffe54
AA		 4799 nfs4_proc_destroy_session(session);
4800 dprintk("%s Destroy backchannel for xprt %p\n",
4801 __func__, session->clp->cl_rpcclient->cl_xprt);
4802 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4803 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4804 nfs4_destroy_slot_tables(session);
557134a3
AA		 4805 kfree(session);
4806}
4807
fc931582
AA		 4808/*
4809 * Initialize the values to be used by the client in CREATE_SESSION
4810 * If nfs4_init_session set the fore channel request and response sizes,
4811 * use them.
4812 *
4813 * Set the back channel max_resp_sz_cached to zero to force the client to
4814 * always set csa_cachethis to FALSE because the current implementation
4815 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4816 */
4817static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4818{
4819 struct nfs4_session *session = args->client->cl_session;
4820 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4821 mxresp_sz = session->fc_attrs.max_resp_sz;
4822
4823 if (mxrqst_sz == 0)
4824 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4825 if (mxresp_sz == 0)
4826 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4827 /* Fore channel attributes */
4828 args->fc_attrs.headerpadsz = 0;
4829 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4830 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4831 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4832 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4833
4834 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4835 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4836 __func__,
4837 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4838 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4839
4840 /* Back channel attributes */
4841 args->bc_attrs.headerpadsz = 0;
4842 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4843 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4844 args->bc_attrs.max_resp_sz_cached = 0;
4845 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4846 args->bc_attrs.max_reqs = 1;
4847
4848 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4849 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4850 __func__,
4851 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4852 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4853 args->bc_attrs.max_reqs);
4854}
4855
43c2e885 4856static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 4857{
43c2e885
BF		 4858 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4859 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4860
4861 if (rcvd->headerpadsz > sent->headerpadsz)
4862 return -EINVAL;
4863 if (rcvd->max_resp_sz > sent->max_resp_sz)
4864 return -EINVAL;
4865 /*
4866 * Our requested max_ops is the minimum we need; we're not
4867 * prepared to break up compounds into smaller pieces than that.
4868 * So, no point even trying to continue if the server won't
4869 * cooperate:
4870 */
4871 if (rcvd->max_ops < sent->max_ops)
4872 return -EINVAL;
4873 if (rcvd->max_reqs == 0)
4874 return -EINVAL;
4875 return 0;
8d35301d
AA		 4876}
4877
43c2e885
BF		 4878static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4879{
4880 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4881 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 4882
43c2e885
BF		 4883 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4884 return -EINVAL;
4885 if (rcvd->max_resp_sz < sent->max_resp_sz)
4886 return -EINVAL;
4887 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4888 return -EINVAL;
4889 /* These would render the backchannel useless: */
4890 if (rcvd->max_ops == 0)
4891 return -EINVAL;
4892 if (rcvd->max_reqs == 0)
4893 return -EINVAL;
4894 return 0;
4895}
8d35301d 4896
8d35301d
AA		 4897static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4898 struct nfs4_session *session)
4899{
43c2e885 4900 int ret;
8d35301d 4901
43c2e885
BF		 4902 ret = nfs4_verify_fore_channel_attrs(args, session);
4903 if (ret)
4904 return ret;
4905 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 4906}
4907
fc931582
AA		 4908static int _nfs4_proc_create_session(struct nfs_client *clp)
4909{
4910 struct nfs4_session *session = clp->cl_session;
4911 struct nfs41_create_session_args args = {
4912 .client = clp,
4913 .cb_program = NFS4_CALLBACK,
4914 };
4915 struct nfs41_create_session_res res = {
4916 .client = clp,
4917 };
4918 struct rpc_message msg = {
4919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4920 .rpc_argp = &args,
4921 .rpc_resp = &res,
4922 };
4923 int status;
4924
4925 nfs4_init_channel_attrs(&args);
0f91421e 4926 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4927
4928 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4929
8d35301d
AA		 4930 if (!status)
4931 /* Verify the session's negotiated channel_attrs values */
4932 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4933 if (!status) {
4934 /* Increment the clientid slot sequence id */
4935 clp->cl_seqid++;
4936 }
4937
4938 return status;
4939}
4940
4941/*
4942 * Issues a CREATE_SESSION operation to the server.
4943 * It is the responsibility of the caller to verify the session is
4944 * expired before calling this routine.
4945 */
f26468fb 4946int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 4947{
4948 int status;
4949 unsigned *ptr;
fc931582
AA		 4950 struct nfs4_session *session = clp->cl_session;
4951
4952 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4953
4954 status = _nfs4_proc_create_session(clp);
4955 if (status)
4956 goto out;
4957
f26468fb
TM		 4958 /* Init and reset the fore channel */
4959 status = nfs4_init_slot_tables(session);
4960 dprintk("slot table initialization returned %d\n", status);
4961 if (status)
4962 goto out;
4963 status = nfs4_reset_slot_tables(session);
4964 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 4965 if (status)
4966 goto out;
4967
4968 ptr = (unsigned *)&session->sess_id.data[0];
4969 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4970 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 4971out:
4972 dprintk("<-- %s\n", __func__);
4973 return status;
4974}
4975
0f3e66c6
AA		 4976/*
4977 * Issue the over-the-wire RPC DESTROY_SESSION.
4978 * The caller must serialize access to this routine.
4979 */
4980int nfs4_proc_destroy_session(struct nfs4_session *session)
4981{
4982 int status = 0;
4983 struct rpc_message msg;
4984
4985 dprintk("--> nfs4_proc_destroy_session\n");
4986
4987 /* session is still being setup */
4988 if (session->clp->cl_cons_state != NFS_CS_READY)
4989 return status;
4990
4991 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4992 msg.rpc_argp = session;
4993 msg.rpc_resp = NULL;
4994 msg.rpc_cred = NULL;
4995 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4996
4997 if (status)
4998 printk(KERN_WARNING
4999 "Got error %d from the server on DESTROY_SESSION. "
5000 "Session has been destroyed regardless...\n", status);
5001
5002 dprintk("<-- nfs4_proc_destroy_session\n");
5003 return status;
5004}
5005
fccba804
TM		 5006int nfs4_init_session(struct nfs_server *server)
5007{
5008 struct nfs_client *clp = server->nfs_client;
2449ea2e 5009 struct nfs4_session *session;
68bf05ef 5010 unsigned int rsize, wsize;
fccba804
TM		 5011 int ret;
5012
5013 if (!nfs4_has_session(clp))
5014 return 0;
5015
1055d76d
TM		 5016 session = clp->cl_session;
5017 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5018 return 0;
5019
68bf05ef
AA		 5020 rsize = server->rsize;
5021 if (rsize == 0)
5022 rsize = NFS_MAX_FILE_IO_SIZE;
5023 wsize = server->wsize;
5024 if (wsize == 0)
5025 wsize = NFS_MAX_FILE_IO_SIZE;
5026
68bf05ef
AA		 5027 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5028 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5029
fccba804
TM		 5030 ret = nfs4_recover_expired_lease(server);
5031 if (!ret)
5032 ret = nfs4_check_client_ready(clp);
5033 return ret;
5034}
5035
fc01cea9
AA		 5036/*
5037 * Renew the cl_session lease.
5038 */
d5f8d3fe
TM		 5039struct nfs4_sequence_data {
5040 struct nfs_client *clp;
5041 struct nfs4_sequence_args args;
5042 struct nfs4_sequence_res res;
5043};
5044
dc96aef9
AB		 5045static void nfs41_sequence_release(void *data)
5046{
d5f8d3fe
TM		 5047 struct nfs4_sequence_data *calldata = data;
5048 struct nfs_client *clp = calldata->clp;
dc96aef9 5049
7135840f
AB		 5050 if (atomic_read(&clp->cl_count) > 1)
5051 nfs4_schedule_state_renewal(clp);
5052 nfs_put_client(clp);
d5f8d3fe 5053 kfree(calldata);
dc96aef9
AB		 5054}
5055
aa5190d0
TM		 5056static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5057{
5058 switch(task->tk_status) {
5059 case -NFS4ERR_DELAY:
aa5190d0
TM		 5060 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5061 return -EAGAIN;
5062 default:
5063 nfs4_schedule_state_recovery(clp);
5064 }
5065 return 0;
5066}
5067
dc96aef9 5068static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5069{
d5f8d3fe
TM		 5070 struct nfs4_sequence_data *calldata = data;
5071 struct nfs_client *clp = calldata->clp;
fc01cea9 5072
14516c3a
TM		 5073 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5074 return;
fc01cea9
AA		 5075
5076 if (task->tk_status < 0) {
5077 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5078 if (atomic_read(&clp->cl_count) == 1)
5079 goto out;
fc01cea9 5080
aa5190d0
TM		 5081 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5082 rpc_restart_call_prepare(task);
fc01cea9
AA		 5083 return;
5084 }
5085 }
fc01cea9 5086 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5087out:
fc01cea9
AA		 5088 dprintk("<-- %s\n", __func__);
5089}
5090
5091static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5092{
d5f8d3fe
TM		 5093 struct nfs4_sequence_data *calldata = data;
5094 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5095 struct nfs4_sequence_args *args;
5096 struct nfs4_sequence_res *res;
5097
fc01cea9
AA		 5098 args = task->tk_msg.rpc_argp;
5099 res = task->tk_msg.rpc_resp;
5100
035168ab 5101 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5102 return;
5103 rpc_call_start(task);
5104}
5105
5106static const struct rpc_call_ops nfs41_sequence_ops = {
5107 .rpc_call_done = nfs41_sequence_call_done,
5108 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5109 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5110};
5111
71ac6da9 5112static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5113{
d5f8d3fe 5114 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5115 struct rpc_message msg = {
5116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5117 .rpc_cred = cred,
5118 };
71ac6da9
TM		 5119 struct rpc_task_setup task_setup_data = {
5120 .rpc_client = clp->cl_rpcclient,
5121 .rpc_message = &msg,
5122 .callback_ops = &nfs41_sequence_ops,
5123 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5124 };
fc01cea9 5125
7135840f 5126 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5127 return ERR_PTR(-EIO);
dfb4f309 5128 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5129 if (calldata == NULL) {
7135840f 5130 nfs_put_client(clp);
71ac6da9 5131 return ERR_PTR(-ENOMEM);
fc01cea9 5132 }
d5f8d3fe
TM		 5133 msg.rpc_argp = &calldata->args;
5134 msg.rpc_resp = &calldata->res;
5135 calldata->clp = clp;
71ac6da9 5136 task_setup_data.callback_data = calldata;
fc01cea9 5137
71ac6da9
TM		 5138 return rpc_run_task(&task_setup_data);
5139}
5140
5141static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5142{
5143 struct rpc_task *task;
5144 int ret = 0;
5145
5146 task = _nfs41_proc_sequence(clp, cred);
5147 if (IS_ERR(task))
5148 ret = PTR_ERR(task);
5149 else
5150 rpc_put_task(task);
5151 dprintk("<-- %s status=%d\n", __func__, ret);
5152 return ret;
5153}
5154
5155static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5156{
5157 struct rpc_task *task;
5158 int ret;
5159
5160 task = _nfs41_proc_sequence(clp, cred);
5161 if (IS_ERR(task)) {
5162 ret = PTR_ERR(task);
5163 goto out;
5164 }
5165 ret = rpc_wait_for_completion_task(task);
5166 if (!ret)
5167 ret = task->tk_status;
5168 rpc_put_task(task);
5169out:
5170 dprintk("<-- %s status=%d\n", __func__, ret);
5171 return ret;
fc01cea9
AA		 5172}
5173
fce5c838
RL		 5174struct nfs4_reclaim_complete_data {
5175 struct nfs_client *clp;
5176 struct nfs41_reclaim_complete_args arg;
5177 struct nfs41_reclaim_complete_res res;
5178};
5179
5180static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5181{
5182 struct nfs4_reclaim_complete_data *calldata = data;
5183
b257957e 5184 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5185 if (nfs41_setup_sequence(calldata->clp->cl_session,
5186 &calldata->arg.seq_args,
fce5c838
RL		 5187 &calldata->res.seq_res, 0, task))
5188 return;
5189
5190 rpc_call_start(task);
5191}
5192
aa5190d0
TM		 5193static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5194{
5195 switch(task->tk_status) {
5196 case 0:
5197 case -NFS4ERR_COMPLETE_ALREADY:
5198 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5199 break;
5200 case -NFS4ERR_DELAY:
aa5190d0
TM		 5201 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5202 return -EAGAIN;
5203 default:
5204 nfs4_schedule_state_recovery(clp);
5205 }
5206 return 0;
5207}
5208
fce5c838
RL		 5209static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5210{
5211 struct nfs4_reclaim_complete_data *calldata = data;
5212 struct nfs_client *clp = calldata->clp;
5213 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5214
5215 dprintk("--> %s\n", __func__);
14516c3a
TM		 5216 if (!nfs41_sequence_done(task, res))
5217 return;
fce5c838 5218
aa5190d0
TM		 5219 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5220 rpc_restart_call_prepare(task);
5221 return;
5222 }
fce5c838
RL		 5223 dprintk("<-- %s\n", __func__);
5224}
5225
5226static void nfs4_free_reclaim_complete_data(void *data)
5227{
5228 struct nfs4_reclaim_complete_data *calldata = data;
5229
5230 kfree(calldata);
5231}
5232
5233static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5234 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5235 .rpc_call_done = nfs4_reclaim_complete_done,
5236 .rpc_release = nfs4_free_reclaim_complete_data,
5237};
5238
5239/*
5240 * Issue a global reclaim complete.
5241 */
5242static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5243{
5244 struct nfs4_reclaim_complete_data *calldata;
5245 struct rpc_task *task;
5246 struct rpc_message msg = {
5247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5248 };
5249 struct rpc_task_setup task_setup_data = {
5250 .rpc_client = clp->cl_rpcclient,
5251 .rpc_message = &msg,
5252 .callback_ops = &nfs4_reclaim_complete_call_ops,
5253 .flags = RPC_TASK_ASYNC,
5254 };
5255 int status = -ENOMEM;
5256
5257 dprintk("--> %s\n", __func__);
8535b2be 5258 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5259 if (calldata == NULL)
5260 goto out;
5261 calldata->clp = clp;
5262 calldata->arg.one_fs = 0;
fce5c838
RL		 5263
5264 msg.rpc_argp = &calldata->arg;
5265 msg.rpc_resp = &calldata->res;
5266 task_setup_data.callback_data = calldata;
5267 task = rpc_run_task(&task_setup_data);
acf82b85 5268 if (IS_ERR(task)) {
fce5c838 5269 status = PTR_ERR(task);
acf82b85
DC		 5270 goto out;
5271 }
fce5c838 5272 rpc_put_task(task);
acf82b85 5273 return 0;
fce5c838
RL		 5274out:
5275 dprintk("<-- %s status=%d\n", __func__, status);
5276 return status;
5277}
b1f69b75
AA		 5278
5279static void
5280nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5281{
5282 struct nfs4_layoutget *lgp = calldata;
5283 struct inode *ino = lgp->args.inode;
5284 struct nfs_server *server = NFS_SERVER(ino);
5285
5286 dprintk("--> %s\n", __func__);
5287 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5288 &lgp->res.seq_res, 0, task))
5289 return;
5290 rpc_call_start(task);
5291}
5292
5293static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5294{
5295 struct nfs4_layoutget *lgp = calldata;
5296 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5297
5298 dprintk("--> %s\n", __func__);
5299
5300 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5301 return;
5302
5303 switch (task->tk_status) {
5304 case 0:
5305 break;
5306 case -NFS4ERR_LAYOUTTRYLATER:
5307 case -NFS4ERR_RECALLCONFLICT:
5308 task->tk_status = -NFS4ERR_DELAY;
5309 /* Fall through */
5310 default:
5311 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5312 rpc_restart_call_prepare(task);
5313 return;
5314 }
5315 }
5316 lgp->status = task->tk_status;
5317 dprintk("<-- %s\n", __func__);
5318}
5319
5320static void nfs4_layoutget_release(void *calldata)
5321{
5322 struct nfs4_layoutget *lgp = calldata;
5323
5324 dprintk("--> %s\n", __func__);
5325 put_layout_hdr(lgp->args.inode);
5326 if (lgp->res.layout.buf != NULL)
5327 free_page((unsigned long) lgp->res.layout.buf);
5328 put_nfs_open_context(lgp->args.ctx);
5329 kfree(calldata);
5330 dprintk("<-- %s\n", __func__);
5331}
5332
5333static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5334 .rpc_call_prepare = nfs4_layoutget_prepare,
5335 .rpc_call_done = nfs4_layoutget_done,
5336 .rpc_release = nfs4_layoutget_release,
5337};
5338
5339int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5340{
5341 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5342 struct rpc_task *task;
5343 struct rpc_message msg = {
5344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5345 .rpc_argp = &lgp->args,
5346 .rpc_resp = &lgp->res,
5347 };
5348 struct rpc_task_setup task_setup_data = {
5349 .rpc_client = server->client,
5350 .rpc_message = &msg,
5351 .callback_ops = &nfs4_layoutget_call_ops,
5352 .callback_data = lgp,
5353 .flags = RPC_TASK_ASYNC,
5354 };
5355 int status = 0;
5356
5357 dprintk("--> %s\n", __func__);
5358
5359 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5360 if (lgp->res.layout.buf == NULL) {
5361 nfs4_layoutget_release(lgp);
5362 return -ENOMEM;
5363 }
5364
5365 lgp->res.seq_res.sr_slot = NULL;
5366 task = rpc_run_task(&task_setup_data);
5367 if (IS_ERR(task))
5368 return PTR_ERR(task);
5369 status = nfs4_wait_for_completion_rpc_task(task);
5370 if (status != 0)
5371 goto out;
5372 status = lgp->status;
5373 if (status != 0)
5374 goto out;
5375 status = pnfs_layout_process(lgp);
5376out:
5377 rpc_put_task(task);
5378 dprintk("<-- %s status=%d\n", __func__, status);
5379 return status;
5380}
5381
5382static int
5383_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5384{
5385 struct nfs4_getdeviceinfo_args args = {
5386 .pdev = pdev,
5387 };
5388 struct nfs4_getdeviceinfo_res res = {
5389 .pdev = pdev,
5390 };
5391 struct rpc_message msg = {
5392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5393 .rpc_argp = &args,
5394 .rpc_resp = &res,
5395 };
5396 int status;
5397
5398 dprintk("--> %s\n", __func__);
5399 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5400 dprintk("<-- %s status=%d\n", __func__, status);
5401
5402 return status;
5403}
5404
5405int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5406{
5407 struct nfs4_exception exception = { };
5408 int err;
5409
5410 do {
5411 err = nfs4_handle_exception(server,
5412 _nfs4_proc_getdeviceinfo(server, pdev),
5413 &exception);
5414 } while (exception.retry);
5415 return err;
5416}
5417EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5418
557134a3
AA		 5419#endif /* CONFIG_NFS_V4_1 */
5420
591d71cb 5421struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5422 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5423 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5424 .recover_open = nfs4_open_reclaim,
5425 .recover_lock = nfs4_lock_reclaim,
591d71cb 5426 .establish_clid = nfs4_init_clientid,
90a16617 5427 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5428};
5429
591d71cb
AA		 5430#if defined(CONFIG_NFS_V4_1)
5431struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5432 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5433 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5434 .recover_open = nfs4_open_reclaim,
5435 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5436 .establish_clid = nfs41_init_clientid,
b4b82607 5437 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5438 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5439};
5440#endif /* CONFIG_NFS_V4_1 */
5441
5442struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5443 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5444 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5445 .recover_open = nfs4_open_expired,
5446 .recover_lock = nfs4_lock_expired,
5447 .establish_clid = nfs4_init_clientid,
90a16617 5448 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5449};
5450
5451#if defined(CONFIG_NFS_V4_1)
5452struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5453 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5454 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5455 .recover_open = nfs4_open_expired,
5456 .recover_lock = nfs4_lock_expired,
4d643d1d 5457 .establish_clid = nfs41_init_clientid,
b4b82607 5458 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5459};
591d71cb 5460#endif /* CONFIG_NFS_V4_1 */
1da177e4 5461
29fba38b
BH		 5462struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5463 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5464 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5465 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5466};
5467
5468#if defined(CONFIG_NFS_V4_1)
5469struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5470 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5471 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5472 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5473};
5474#endif
5475
97dc1359
TM		 5476static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5477 .minor_version = 0,
5478 .call_sync = _nfs4_call_sync,
e047a10c 5479 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5480 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5481 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5482 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5483};
5484
5485#if defined(CONFIG_NFS_V4_1)
5486static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5487 .minor_version = 1,
5488 .call_sync = _nfs4_call_sync_session,
e047a10c 5489 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5490 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5491 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5492 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5493};
5494#endif
5495
97dc1359
TM		 5496const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5497 [0] = &nfs_v4_0_minor_ops,
5498#if defined(CONFIG_NFS_V4_1)
5499 [1] = &nfs_v4_1_minor_ops,
5500#endif
5501};
5502
92e1d5be 5503static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5504 .permission = nfs_permission,
5505 .getattr = nfs_getattr,
5506 .setattr = nfs_setattr,
5507 .getxattr = nfs4_getxattr,
5508 .setxattr = nfs4_setxattr,
5509 .listxattr = nfs4_listxattr,
5510};
5511
509de811 5512const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5513 .version = 4, /* protocol version */
5514 .dentry_ops = &nfs4_dentry_operations,
5515 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5516 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5517 .getroot = nfs4_proc_get_root,
5518 .getattr = nfs4_proc_getattr,
5519 .setattr = nfs4_proc_setattr,
2b3de441 5520 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5521 .lookup = nfs4_proc_lookup,
5522 .access = nfs4_proc_access,
5523 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5524 .create = nfs4_proc_create,
5525 .remove = nfs4_proc_remove,
5526 .unlink_setup = nfs4_proc_unlink_setup,
5527 .unlink_done = nfs4_proc_unlink_done,
5528 .rename = nfs4_proc_rename,
d3d4152a
JL		 5529 .rename_setup = nfs4_proc_rename_setup,
5530 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5531 .link = nfs4_proc_link,
5532 .symlink = nfs4_proc_symlink,
5533 .mkdir = nfs4_proc_mkdir,
5534 .rmdir = nfs4_proc_remove,
5535 .readdir = nfs4_proc_readdir,
5536 .mknod = nfs4_proc_mknod,
5537 .statfs = nfs4_proc_statfs,
5538 .fsinfo = nfs4_proc_fsinfo,
5539 .pathconf = nfs4_proc_pathconf,
e9326dca 5540 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5541 .decode_dirent = nfs4_decode_dirent,
5542 .read_setup = nfs4_proc_read_setup,
ec06c096 5543 .read_done = nfs4_read_done,
1da177e4 5544 .write_setup = nfs4_proc_write_setup,
788e7a89 5545 .write_done = nfs4_write_done,
1da177e4 5546 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5547 .commit_done = nfs4_commit_done,
1da177e4 5548 .lock = nfs4_proc_lock,
e50a1c2e 5549 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5550 .close_context = nfs4_close_context,
2b484297 5551 .open_context = nfs4_atomic_open,
1da177e4
LT		 5552};
5553
5554/*
5555 * Local variables:
5556 * c-basic-offset: 8
5557 * End:
5558 */
Linux 6.x block layer and io_uring tree(s)