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Merge branch 'omap-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[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>
64c2ce8b 52#include <linux/xattr.h>
c7a360b0 53#include <linux/utsname.h>
e9e3d724 54#include <linux/mm.h>
1da177e4 55
4ce79717 56#include "nfs4_fs.h"
1da177e4 57#include "delegation.h"
101070ca 58#include "internal.h"
006ea73e 59#include "iostat.h"
fc931582 60#include "callback.h"
b1f69b75 61#include "pnfs.h"
1da177e4
LT		 62
63#define NFSDBG_FACILITY NFSDBG_PROC
64
2066fe89 65#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 66#define NFS4_POLL_RETRY_MAX (15*HZ)
67
a78cb57a
TM		 68#define NFS4_MAX_LOOP_ON_RECOVER (10)
69
cdd4e68b 70struct nfs4_opendata;
864472e9 71static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 72static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 73static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 74static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 75static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
76static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 77static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
78 struct nfs_fattr *fattr, struct iattr *sattr,
79 struct nfs4_state *state);
1da177e4 80
1da177e4 81/* Prevent leaks of NFSv4 errors into userland */
46f72f57 82static int nfs4_map_errors(int err)
1da177e4 83{
52567b03
TM		 84 if (err >= -1000)
85 return err;
86 switch (err) {
87 case -NFS4ERR_RESOURCE:
88 return -EREMOTEIO;
89 default:
1da177e4 90 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 91 __func__, -err);
52567b03 92 break;
1da177e4 93 }
52567b03 94 return -EIO;
1da177e4
LT		 95}
96
97/*
98 * This is our standard bitmap for GETATTR requests.
99 */
100const u32 nfs4_fattr_bitmap[2] = {
101 FATTR4_WORD0_TYPE
102 | FATTR4_WORD0_CHANGE
103 | FATTR4_WORD0_SIZE
104 | FATTR4_WORD0_FSID
105 | FATTR4_WORD0_FILEID,
106 FATTR4_WORD1_MODE
107 | FATTR4_WORD1_NUMLINKS
108 | FATTR4_WORD1_OWNER
109 | FATTR4_WORD1_OWNER_GROUP
110 | FATTR4_WORD1_RAWDEV
111 | FATTR4_WORD1_SPACE_USED
112 | FATTR4_WORD1_TIME_ACCESS
113 | FATTR4_WORD1_TIME_METADATA
114 | FATTR4_WORD1_TIME_MODIFY
115};
116
117const u32 nfs4_statfs_bitmap[2] = {
118 FATTR4_WORD0_FILES_AVAIL
119 | FATTR4_WORD0_FILES_FREE
120 | FATTR4_WORD0_FILES_TOTAL,
121 FATTR4_WORD1_SPACE_AVAIL
122 | FATTR4_WORD1_SPACE_FREE
123 | FATTR4_WORD1_SPACE_TOTAL
124};
125
4ce79717 126const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 127 FATTR4_WORD0_MAXLINK
128 | FATTR4_WORD0_MAXNAME,
129 0
130};
131
132const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
133 | FATTR4_WORD0_MAXREAD
134 | FATTR4_WORD0_MAXWRITE
135 | FATTR4_WORD0_LEASE_TIME,
55b6e774 136 FATTR4_WORD1_TIME_DELTA
504913fb 137 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 138};
139
830b8e33
MN		 140const u32 nfs4_fs_locations_bitmap[2] = {
141 FATTR4_WORD0_TYPE
142 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_SIZE
144 | FATTR4_WORD0_FSID
145 | FATTR4_WORD0_FILEID
146 | FATTR4_WORD0_FS_LOCATIONS,
147 FATTR4_WORD1_MODE
148 | FATTR4_WORD1_NUMLINKS
149 | FATTR4_WORD1_OWNER
150 | FATTR4_WORD1_OWNER_GROUP
151 | FATTR4_WORD1_RAWDEV
152 | FATTR4_WORD1_SPACE_USED
153 | FATTR4_WORD1_TIME_ACCESS
154 | FATTR4_WORD1_TIME_METADATA
155 | FATTR4_WORD1_TIME_MODIFY
156 | FATTR4_WORD1_MOUNTED_ON_FILEID
157};
158
bc4785cd 159static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 160 struct nfs4_readdir_arg *readdir)
161{
0dbb4c67 162 __be32 *start, *p;
1da177e4
LT		 163
164 BUG_ON(readdir->count < 80);
165 if (cookie > 2) {
b7ef1956 166 readdir->cookie = cookie;
1da177e4
LT		 167 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
168 return;
169 }
170
171 readdir->cookie = 0;
172 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
173 if (cookie == 2)
174 return;
175
176 /*
177 * NFSv4 servers do not return entries for '.' and '..'
178 * Therefore, we fake these entries here. We let '.'
179 * have cookie 0 and '..' have cookie 1. Note that
180 * when talking to the server, we always send cookie 0
181 * instead of 1 or 2.
182 */
0dbb4c67 183 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 184
185 if (cookie == 0) {
186 *p++ = xdr_one; /* next */
187 *p++ = xdr_zero; /* cookie, first word */
188 *p++ = xdr_one; /* cookie, second word */
189 *p++ = xdr_one; /* entry len */
190 memcpy(p, ".\0\0\0", 4); /* entry */
191 p++;
192 *p++ = xdr_one; /* bitmap length */
193 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
194 *p++ = htonl(8); /* attribute buffer length */
4e769b93 195 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 196 }
197
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_two; /* cookie, second word */
201 *p++ = xdr_two; /* entry len */
202 memcpy(p, "..\0\0", 4); /* entry */
203 p++;
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
4e769b93 207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 208
209 readdir->pgbase = (char *)p - (char *)start;
210 readdir->count -= readdir->pgbase;
211 kunmap_atomic(start, KM_USER0);
212}
213
65de872e
TM		 214static int nfs4_wait_clnt_recover(struct nfs_client *clp)
215{
216 int res;
217
218 might_sleep();
219
e005e804 220 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 221 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 222 return res;
223}
224
225static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
226{
227 int res = 0;
228
229 might_sleep();
230
231 if (*timeout <= 0)
232 *timeout = NFS4_POLL_RETRY_MIN;
233 if (*timeout > NFS4_POLL_RETRY_MAX)
234 *timeout = NFS4_POLL_RETRY_MAX;
235 schedule_timeout_killable(*timeout);
236 if (fatal_signal_pending(current))
237 res = -ERESTARTSYS;
238 *timeout <<= 1;
239 return res;
240}
241
242/* This is the error handling routine for processes that are allowed
243 * to sleep.
244 */
245static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
246{
247 struct nfs_client *clp = server->nfs_client;
9e33bed5 248 struct nfs4_state *state = exception->state;
65de872e
TM		 249 int ret = errorcode;
250
251 exception->retry = 0;
252 switch(errorcode) {
253 case 0:
254 return 0;
9e33bed5
TM		 255 case -NFS4ERR_ADMIN_REVOKED:
256 case -NFS4ERR_BAD_STATEID:
257 case -NFS4ERR_OPENMODE:
258 if (state == NULL)
259 break;
260 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 261 goto do_state_recovery;
65de872e 262 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 263 case -NFS4ERR_STALE_CLIENTID:
65de872e 264 case -NFS4ERR_EXPIRED:
a2c0b9e2 265 goto do_state_recovery;
03391693 266#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 267 case -NFS4ERR_BADSESSION:
268 case -NFS4ERR_BADSLOT:
269 case -NFS4ERR_BAD_HIGH_SLOT:
270 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
271 case -NFS4ERR_DEADSESSION:
272 case -NFS4ERR_SEQ_FALSE_RETRY:
273 case -NFS4ERR_SEQ_MISORDERED:
274 dprintk("%s ERROR: %d Reset session\n", __func__,
275 errorcode);
0b9e2d41 276 nfs4_schedule_state_recovery(clp);
4745e315 277 exception->retry = 1;
b9179237 278 break;
03391693 279#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 280 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 281 if (exception->timeout > HZ) {
282 /* We have retried a decent amount, time to
283 * fail
284 */
285 ret = -EBUSY;
286 break;
287 }
65de872e
TM		 288 case -NFS4ERR_GRACE:
289 case -NFS4ERR_DELAY:
2c643488 290 case -EKEYEXPIRED:
65de872e
TM		 291 ret = nfs4_delay(server->client, &exception->timeout);
292 if (ret != 0)
293 break;
294 case -NFS4ERR_OLD_STATEID:
295 exception->retry = 1;
296 }
297 /* We failed to handle the error */
298 return nfs4_map_errors(ret);
a2c0b9e2
TM		 299do_state_recovery:
300 nfs4_schedule_state_recovery(clp);
301 ret = nfs4_wait_clnt_recover(clp);
302 if (ret == 0)
303 exception->retry = 1;
304 return ret;
65de872e
TM		 305}
306
307
452e9352 308static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 309{
1da177e4
LT		 310 spin_lock(&clp->cl_lock);
311 if (time_before(clp->cl_last_renewal,timestamp))
312 clp->cl_last_renewal = timestamp;
313 spin_unlock(&clp->cl_lock);
314}
315
452e9352
TM		 316static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
317{
318 do_renew_lease(server->nfs_client, timestamp);
319}
320
cccef3b9
AA		 321#if defined(CONFIG_NFS_V4_1)
322
e2c4ab3c
AA		 323/*
324 * nfs4_free_slot - free a slot and efficiently update slot table.
325 *
326 * freeing a slot is trivially done by clearing its respective bit
327 * in the bitmap.
328 * If the freed slotid equals highest_used_slotid we want to update it
329 * so that the server would be able to size down the slot table if needed,
330 * otherwise we know that the highest_used_slotid is still in use.
331 * When updating highest_used_slotid there may be "holes" in the bitmap
332 * so we need to scan down from highest_used_slotid to 0 looking for the now
333 * highest slotid in use.
334 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 335 *
336 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 337 */
338static void
dfb4f309 339nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 340{
dfb4f309 341 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 342 int slotid = free_slotid;
343
dfb4f309 344 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 345 /* clear used bit in bitmap */
346 __clear_bit(slotid, tbl->used_slots);
347
348 /* update highest_used_slotid when it is freed */
349 if (slotid == tbl->highest_used_slotid) {
350 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 351 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 352 tbl->highest_used_slotid = slotid;
353 else
354 tbl->highest_used_slotid = -1;
355 }
e2c4ab3c
AA		 356 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
357 free_slotid, tbl->highest_used_slotid);
358}
359
3bfb0fc5 360/*
42acd021 361 * Signal state manager thread if session fore channel is drained
3bfb0fc5 362 */
42acd021 363static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 364{
689cf5c1
AB		 365 struct rpc_task *task;
366
a2118c33 367 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 368 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
369 if (task)
370 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 371 return;
372 }
373
374 if (ses->fc_slot_table.highest_used_slotid != -1)
375 return;
376
42acd021
AA		 377 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
378 complete(&ses->fc_slot_table.complete);
379}
380
381/*
382 * Signal state manager thread if session back channel is drained
383 */
384void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
385{
386 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
387 ses->bc_slot_table.highest_used_slotid != -1)
388 return;
389 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
390 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 391}
392
d185a334 393static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 394{
395 struct nfs4_slot_table *tbl;
396
d185a334 397 tbl = &res->sr_session->fc_slot_table;
dfb4f309 398 if (!res->sr_slot) {
13615871
AA		 399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
691daf3b 401 dprintk("%s: No slot\n", __func__);
35dc1d74 402 return;
13615871 403 }
ea028ac9 404
35dc1d74 405 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 406 nfs4_free_slot(tbl, res->sr_slot);
42acd021 407 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 408 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 409 res->sr_slot = NULL;
13615871
AA		 410}
411
14516c3a 412static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 413{
414 unsigned long timestamp;
14516c3a 415 struct nfs_client *clp;
b0df806c
AA		 416
417 /*
418 * sr_status remains 1 if an RPC level error occurred. The server
419 * may or may not have processed the sequence operation..
420 * Proceed as if the server received and processed the sequence
421 * operation.
422 */
423 if (res->sr_status == 1)
424 res->sr_status = NFS_OK;
425
426 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 427 if (!res->sr_slot)
b0df806c
AA		 428 goto out;
429
691daf3b 430 /* Check the SEQUENCE operation status */
14516c3a
TM		 431 switch (res->sr_status) {
432 case 0:
b0df806c 433 /* Update the slot's sequence and clientid lease timer */
dfb4f309 434 ++res->sr_slot->seq_nr;
b0df806c 435 timestamp = res->sr_renewal_time;
14516c3a 436 clp = res->sr_session->clp;
452e9352 437 do_renew_lease(clp, timestamp);
0629e370 438 /* Check sequence flags */
7135840f
AB		 439 if (atomic_read(&clp->cl_count) > 1)
440 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
14516c3a
TM		 441 break;
442 case -NFS4ERR_DELAY:
443 /* The server detected a resend of the RPC call and
444 * returned NFS4ERR_DELAY as per Section 2.10.6.2
445 * of RFC5661.
446 */
12364a4f 447 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 448 __func__,
449 res->sr_slot - res->sr_session->fc_slot_table.slots,
450 res->sr_slot->seq_nr);
14516c3a
TM		 451 goto out_retry;
452 default:
453 /* Just update the slot sequence no. */
dfb4f309 454 ++res->sr_slot->seq_nr;
b0df806c
AA		 455 }
456out:
457 /* The session may be reset by one of the error handlers. */
458 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 459 nfs41_sequence_free_slot(res);
14516c3a
TM		 460 return 1;
461out_retry:
d05dd4e9 462 if (!rpc_restart_call(task))
14516c3a
TM		 463 goto out;
464 rpc_delay(task, NFS4_POLL_RETRY_MAX);
465 return 0;
b0df806c
AA		 466}
467
14516c3a
TM		 468static int nfs4_sequence_done(struct rpc_task *task,
469 struct nfs4_sequence_res *res)
df896455 470{
14516c3a
TM		 471 if (res->sr_session == NULL)
472 return 1;
473 return nfs41_sequence_done(task, res);
df896455
TM		 474}
475
510b8175
BH		 476/*
477 * nfs4_find_slot - efficiently look for a free slot
478 *
479 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
480 * If found, we mark the slot as used, update the highest_used_slotid,
481 * and respectively set up the sequence operation args.
482 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 483 *
484 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 485 */
486static u8
40ead580 487nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 488{
489 int slotid;
490 u8 ret_id = NFS4_MAX_SLOT_TABLE;
491 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
492
510b8175
BH		 493 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
494 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
495 tbl->max_slots);
496 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
497 if (slotid >= tbl->max_slots)
498 goto out;
499 __set_bit(slotid, tbl->used_slots);
500 if (slotid > tbl->highest_used_slotid)
501 tbl->highest_used_slotid = slotid;
502 ret_id = slotid;
503out:
504 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
505 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 506 return ret_id;
507}
508
ce5039c1
AA		 509static int nfs41_setup_sequence(struct nfs4_session *session,
510 struct nfs4_sequence_args *args,
511 struct nfs4_sequence_res *res,
512 int cache_reply,
513 struct rpc_task *task)
514{
fbcd4abc
AA		 515 struct nfs4_slot *slot;
516 struct nfs4_slot_table *tbl;
517 u8 slotid;
518
519 dprintk("--> %s\n", __func__);
ce5039c1 520 /* slot already allocated? */
dfb4f309 521 if (res->sr_slot != NULL)
ce5039c1
AA		 522 return 0;
523
fbcd4abc
AA		 524 tbl = &session->fc_slot_table;
525
526 spin_lock(&tbl->slot_tbl_lock);
a2118c33 527 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 529 /*
530 * The state manager will wait until the slot table is empty.
531 * Schedule the reset thread
532 */
05f0d236 533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 534 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 535 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 536 return -EAGAIN;
b069d94a
AA		 537 }
538
689cf5c1
AB		 539 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
540 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 dprintk("%s enforce FIFO order\n", __func__);
544 return -EAGAIN;
545 }
546
40ead580 547 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 548 if (slotid == NFS4_MAX_SLOT_TABLE) {
549 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
550 spin_unlock(&tbl->slot_tbl_lock);
551 dprintk("<-- %s: no free slots\n", __func__);
552 return -EAGAIN;
553 }
554 spin_unlock(&tbl->slot_tbl_lock);
555
689cf5c1 556 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 557 slot = tbl->slots + slotid;
99fe60d0 558 args->sa_session = session;
fbcd4abc
AA		 559 args->sa_slotid = slotid;
560 args->sa_cache_this = cache_reply;
561
562 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
563
99fe60d0 564 res->sr_session = session;
dfb4f309 565 res->sr_slot = slot;
fbcd4abc 566 res->sr_renewal_time = jiffies;
2a6e26cd 567 res->sr_status_flags = 0;
fbcd4abc
AA		 568 /*
569 * sr_status is only set in decode_sequence, and so will remain
570 * set to 1 if an rpc level failure occurs.
571 */
572 res->sr_status = 1;
ce5039c1
AA		 573 return 0;
574}
575
035168ab 576int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 577 struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res,
579 int cache_reply,
580 struct rpc_task *task)
581{
035168ab 582 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 583 int ret = 0;
584
035168ab
TM		 585 if (session == NULL) {
586 args->sa_session = NULL;
587 res->sr_session = NULL;
588 goto out;
589 }
590
12364a4f 591 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 592 __func__, session->clp, session, res->sr_slot ?
593 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 594
035168ab 595 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 596 task);
ce5039c1
AA		 597out:
598 dprintk("<-- %s status=%d\n", __func__, ret);
599 return ret;
600}
601
602struct nfs41_call_sync_data {
035168ab 603 const struct nfs_server *seq_server;
ce5039c1
AA		 604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606 int cache_reply;
607};
608
609static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
610{
611 struct nfs41_call_sync_data *data = calldata;
612
035168ab
TM		 613 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
614
615 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 616 data->seq_res, data->cache_reply, task))
617 return;
618 rpc_call_start(task);
619}
620
b257957e
AB		 621static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
622{
623 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
624 nfs41_call_sync_prepare(task, calldata);
625}
626
69ab40c4
AA		 627static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
628{
629 struct nfs41_call_sync_data *data = calldata;
630
14516c3a 631 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 632}
633
ce5039c1
AA		 634struct rpc_call_ops nfs41_call_sync_ops = {
635 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 636 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 637};
638
b257957e
AB		 639struct rpc_call_ops nfs41_call_priv_sync_ops = {
640 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
641 .rpc_call_done = nfs41_call_sync_done,
642};
643
035168ab 644static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 645 struct rpc_message *msg,
646 struct nfs4_sequence_args *args,
647 struct nfs4_sequence_res *res,
b257957e
AB		 648 int cache_reply,
649 int privileged)
ce5039c1
AA		 650{
651 int ret;
652 struct rpc_task *task;
653 struct nfs41_call_sync_data data = {
035168ab 654 .seq_server = server,
ce5039c1
AA		 655 .seq_args = args,
656 .seq_res = res,
657 .cache_reply = cache_reply,
658 };
659 struct rpc_task_setup task_setup = {
035168ab 660 .rpc_client = server->client,
ce5039c1
AA		 661 .rpc_message = msg,
662 .callback_ops = &nfs41_call_sync_ops,
663 .callback_data = &data
664 };
665
dfb4f309 666 res->sr_slot = NULL;
b257957e
AB		 667 if (privileged)
668 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 669 task = rpc_run_task(&task_setup);
670 if (IS_ERR(task))
671 ret = PTR_ERR(task);
672 else {
673 ret = task->tk_status;
674 rpc_put_task(task);
675 }
676 return ret;
677}
678
cccef3b9
AA		 679int _nfs4_call_sync_session(struct nfs_server *server,
680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
683 int cache_reply)
684{
035168ab 685 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 686}
687
df896455 688#else
14516c3a
TM		 689static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
df896455 691{
14516c3a 692 return 1;
df896455 693}
cccef3b9
AA		 694#endif /* CONFIG_NFS_V4_1 */
695
696int _nfs4_call_sync(struct nfs_server *server,
697 struct rpc_message *msg,
698 struct nfs4_sequence_args *args,
699 struct nfs4_sequence_res *res,
700 int cache_reply)
701{
f3752975 702 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 703 return rpc_call_sync(server->client, msg, 0);
704}
705
706#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 707 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 708 &(res)->seq_res, (cache_reply))
709
38478b24 710static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 711{
38478b24 712 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 713
38478b24 714 spin_lock(&dir->i_lock);
40d24704
TM		 715 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
716 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 717 nfs_force_lookup_revalidate(dir);
40d24704 718 nfsi->change_attr = cinfo->after;
38478b24 719 spin_unlock(&dir->i_lock);
1da177e4
LT		 720}
721
e56e0b78 722struct nfs4_opendata {
c6d00e63 723 struct kref kref;
e56e0b78
TM		 724 struct nfs_openargs o_arg;
725 struct nfs_openres o_res;
cdd4e68b
TM		 726 struct nfs_open_confirmargs c_arg;
727 struct nfs_open_confirmres c_res;
e56e0b78
TM		 728 struct nfs_fattr f_attr;
729 struct nfs_fattr dir_attr;
ad389da7 730 struct path path;
e56e0b78
TM		 731 struct dentry *dir;
732 struct nfs4_state_owner *owner;
aac00a8d 733 struct nfs4_state *state;
e56e0b78 734 struct iattr attrs;
26e976a8 735 unsigned long timestamp;
3e309914 736 unsigned int rpc_done : 1;
24ac23ab
TM		 737 int rpc_status;
738 int cancelled;
e56e0b78
TM		 739};
740
2ced46c2
TM		 741
742static void nfs4_init_opendata_res(struct nfs4_opendata *p)
743{
744 p->o_res.f_attr = &p->f_attr;
745 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 746 p->o_res.seqid = p->o_arg.seqid;
747 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 748 p->o_res.server = p->o_arg.server;
749 nfs_fattr_init(&p->f_attr);
750 nfs_fattr_init(&p->dir_attr);
751}
752
ad389da7 753static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 754 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 755 const struct iattr *attrs,
756 gfp_t gfp_mask)
e56e0b78 757{
ad389da7 758 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 759 struct inode *dir = parent->d_inode;
760 struct nfs_server *server = NFS_SERVER(dir);
761 struct nfs4_opendata *p;
762
8535b2be 763 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 764 if (p == NULL)
765 goto err;
8535b2be 766 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 767 if (p->o_arg.seqid == NULL)
768 goto err_free;
f6948697
AV		 769 path_get(path);
770 p->path = *path;
e56e0b78
TM		 771 p->dir = parent;
772 p->owner = sp;
773 atomic_inc(&sp->so_count);
774 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 775 p->o_arg.open_flags = flags;
776 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 777 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 778 p->o_arg.id = sp->so_owner_id.id;
ad389da7 779 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 780 p->o_arg.server = server;
781 p->o_arg.bitmask = server->attr_bitmask;
782 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 783 if (flags & O_CREAT) {
784 u32 *s;
785
e56e0b78
TM		 786 p->o_arg.u.attrs = &p->attrs;
787 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 788 s = (u32 *) p->o_arg.u.verifier.data;
789 s[0] = jiffies;
790 s[1] = current->pid;
e56e0b78 791 }
cdd4e68b
TM		 792 p->c_arg.fh = &p->o_res.fh;
793 p->c_arg.stateid = &p->o_res.stateid;
794 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 795 nfs4_init_opendata_res(p);
c6d00e63 796 kref_init(&p->kref);
e56e0b78
TM		 797 return p;
798err_free:
799 kfree(p);
800err:
801 dput(parent);
802 return NULL;
803}
804
c6d00e63 805static void nfs4_opendata_free(struct kref *kref)
e56e0b78 806{
c6d00e63
TM		 807 struct nfs4_opendata *p = container_of(kref,
808 struct nfs4_opendata, kref);
809
810 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 811 if (p->state != NULL)
812 nfs4_put_open_state(p->state);
c6d00e63
TM		 813 nfs4_put_state_owner(p->owner);
814 dput(p->dir);
31f31db1 815 path_put(&p->path);
c6d00e63
TM		 816 kfree(p);
817}
818
819static void nfs4_opendata_put(struct nfs4_opendata *p)
820{
821 if (p != NULL)
822 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 823}
824
06f814a3
TM		 825static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
826{
06f814a3
TM		 827 int ret;
828
06f814a3 829 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 830 return ret;
831}
832
dc0b027d 833static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 834{
835 int ret = 0;
dc0b027d
TM		 836
837 if (open_mode & O_EXCL)
838 goto out;
839 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 840 case FMODE_READ:
88069f77
TM		 841 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
842 && state->n_rdonly != 0;
6ee41268
TM		 843 break;
844 case FMODE_WRITE:
88069f77
TM		 845 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
846 && state->n_wronly != 0;
6ee41268
TM		 847 break;
848 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 849 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
850 && state->n_rdwr != 0;
6ee41268 851 }
dc0b027d 852out:
6ee41268
TM		 853 return ret;
854}
855
dc0b027d 856static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 857{
dc0b027d 858 if ((delegation->type & fmode) != fmode)
aac00a8d 859 return 0;
15c831bf 860 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 861 return 0;
b7391f44 862 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 863 return 1;
864}
865
dc0b027d 866static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 867{
dc0b027d 868 switch (fmode) {
e7616923
TM		 869 case FMODE_WRITE:
870 state->n_wronly++;
871 break;
872 case FMODE_READ:
873 state->n_rdonly++;
874 break;
875 case FMODE_READ|FMODE_WRITE:
876 state->n_rdwr++;
877 }
dc0b027d 878 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 879}
880
dc0b027d 881static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 882{
883 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
884 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
885 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 886 switch (fmode) {
003707c7
TM		 887 case FMODE_READ:
888 set_bit(NFS_O_RDONLY_STATE, &state->flags);
889 break;
890 case FMODE_WRITE:
891 set_bit(NFS_O_WRONLY_STATE, &state->flags);
892 break;
893 case FMODE_READ|FMODE_WRITE:
894 set_bit(NFS_O_RDWR_STATE, &state->flags);
895 }
e7616923
TM		 896}
897
dc0b027d 898static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 899{
8bda4e4c 900 write_seqlock(&state->seqlock);
dc0b027d 901 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 902 write_sequnlock(&state->seqlock);
003707c7
TM		 903}
904
dc0b027d 905static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 906{
8bda4e4c
TM		 907 /*
908 * Protect the call to nfs4_state_set_mode_locked and
909 * serialise the stateid update
910 */
911 write_seqlock(&state->seqlock);
003707c7
TM		 912 if (deleg_stateid != NULL) {
913 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
914 set_bit(NFS_DELEGATED_STATE, &state->flags);
915 }
916 if (open_stateid != NULL)
dc0b027d 917 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 918 write_sequnlock(&state->seqlock);
919 spin_lock(&state->owner->so_lock);
dc0b027d 920 update_open_stateflags(state, fmode);
ec073428 921 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 922}
923
dc0b027d 924static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 925{
926 struct nfs_inode *nfsi = NFS_I(state->inode);
927 struct nfs_delegation *deleg_cur;
928 int ret = 0;
929
dc0b027d 930 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 931
932 rcu_read_lock();
933 deleg_cur = rcu_dereference(nfsi->delegation);
934 if (deleg_cur == NULL)
935 goto no_delegation;
936
937 spin_lock(&deleg_cur->lock);
938 if (nfsi->delegation != deleg_cur ||
dc0b027d 939 (deleg_cur->type & fmode) != fmode)
34310430
TM		 940 goto no_delegation_unlock;
941
942 if (delegation == NULL)
943 delegation = &deleg_cur->stateid;
944 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
945 goto no_delegation_unlock;
946
b7391f44 947 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 948 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 949 ret = 1;
950no_delegation_unlock:
951 spin_unlock(&deleg_cur->lock);
952no_delegation:
953 rcu_read_unlock();
954
955 if (!ret && open_stateid != NULL) {
dc0b027d 956 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 957 ret = 1;
958 }
959
960 return ret;
961}
962
963
dc0b027d 964static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 965{
966 struct nfs_delegation *delegation;
967
968 rcu_read_lock();
969 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 970 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 971 rcu_read_unlock();
972 return;
973 }
974 rcu_read_unlock();
975 nfs_inode_return_delegation(inode);
976}
977
6ee41268 978static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 979{
980 struct nfs4_state *state = opendata->state;
981 struct nfs_inode *nfsi = NFS_I(state->inode);
982 struct nfs_delegation *delegation;
dc0b027d
TM		 983 int open_mode = opendata->o_arg.open_flags & O_EXCL;
984 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 985 nfs4_stateid stateid;
986 int ret = -EAGAIN;
987
aac00a8d 988 for (;;) {
dc0b027d 989 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 990 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 991 if (can_open_cached(state, fmode, open_mode)) {
992 update_open_stateflags(state, fmode);
6ee41268 993 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 994 goto out_return_state;
995 }
996 spin_unlock(&state->owner->so_lock);
997 }
34310430
TM		 998 rcu_read_lock();
999 delegation = rcu_dereference(nfsi->delegation);
1000 if (delegation == NULL ||
dc0b027d 1001 !can_open_delegated(delegation, fmode)) {
34310430 1002 rcu_read_unlock();
aac00a8d 1003 break;
34310430 1004 }
aac00a8d
TM		 1005 /* Save the delegation */
1006 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1007 rcu_read_unlock();
af22f94a 1008 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1009 if (ret != 0)
1010 goto out;
1011 ret = -EAGAIN;
34310430
TM		 1012
1013 /* Try to update the stateid using the delegation */
dc0b027d 1014 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1015 goto out_return_state;
aac00a8d 1016 }
aac00a8d
TM		 1017out:
1018 return ERR_PTR(ret);
1019out_return_state:
1020 atomic_inc(&state->count);
1021 return state;
1022}
1023
24ac23ab
TM		 1024static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1025{
1026 struct inode *inode;
1027 struct nfs4_state *state = NULL;
003707c7 1028 struct nfs_delegation *delegation;
1b370bc2 1029 int ret;
24ac23ab 1030
aac00a8d 1031 if (!data->rpc_done) {
6ee41268 1032 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1033 goto out;
1034 }
1035
1b370bc2 1036 ret = -EAGAIN;
24ac23ab 1037 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1038 goto err;
24ac23ab 1039 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1040 ret = PTR_ERR(inode);
03f28e3a 1041 if (IS_ERR(inode))
1b370bc2
TM		 1042 goto err;
1043 ret = -ENOMEM;
24ac23ab
TM		 1044 state = nfs4_get_open_state(inode, data->owner);
1045 if (state == NULL)
1b370bc2 1046 goto err_put_inode;
549d6ed5 1047 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1048 int delegation_flags = 0;
1049
003707c7
TM		 1050 rcu_read_lock();
1051 delegation = rcu_dereference(NFS_I(inode)->delegation);
1052 if (delegation)
1053 delegation_flags = delegation->flags;
1054 rcu_read_unlock();
15c831bf 1055 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1056 nfs_inode_set_delegation(state->inode,
1057 data->owner->so_cred,
1058 &data->o_res);
1059 else
1060 nfs_inode_reclaim_delegation(state->inode,
1061 data->owner->so_cred,
1062 &data->o_res);
1063 }
34310430
TM		 1064
1065 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1066 data->o_arg.fmode);
24ac23ab 1067 iput(inode);
aac00a8d 1068out:
24ac23ab 1069 return state;
1b370bc2
TM		 1070err_put_inode:
1071 iput(inode);
1072err:
1073 return ERR_PTR(ret);
24ac23ab
TM		 1074}
1075
864472e9
TM		 1076static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1077{
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_open_context *ctx;
1080
1081 spin_lock(&state->inode->i_lock);
1082 list_for_each_entry(ctx, &nfsi->open_files, list) {
1083 if (ctx->state != state)
1084 continue;
1085 get_nfs_open_context(ctx);
1086 spin_unlock(&state->inode->i_lock);
1087 return ctx;
1088 }
1089 spin_unlock(&state->inode->i_lock);
1090 return ERR_PTR(-ENOENT);
1091}
1092
6f220ed5
TM		 1093static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1094{
1095 struct nfs4_opendata *opendata;
1096
8535b2be 1097 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1098 if (opendata == NULL)
1099 return ERR_PTR(-ENOMEM);
1100 opendata->state = state;
1101 atomic_inc(&state->count);
1102 return opendata;
1103}
1104
dc0b027d 1105static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1106{
2ced46c2 1107 struct nfs4_state *newstate;
864472e9
TM		 1108 int ret;
1109
dc0b027d
TM		 1110 opendata->o_arg.open_flags = 0;
1111 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1112 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1113 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1114 nfs4_init_opendata_res(opendata);
b257957e 1115 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1116 if (ret != 0)
1117 return ret;
2ced46c2 1118 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1119 if (IS_ERR(newstate))
1120 return PTR_ERR(newstate);
dc0b027d 1121 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1122 *res = newstate;
864472e9
TM		 1123 return 0;
1124}
1125
1126static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1127{
864472e9 1128 struct nfs4_state *newstate;
864472e9
TM		 1129 int ret;
1130
1131 /* memory barrier prior to reading state->n_* */
2ced46c2 1132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1133 smp_rmb();
1134 if (state->n_rdwr != 0) {
b0ed9dbc 1135 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1136 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1137 if (ret != 0)
1138 return ret;
2ced46c2
TM		 1139 if (newstate != state)
1140 return -ESTALE;
864472e9
TM		 1141 }
1142 if (state->n_wronly != 0) {
b0ed9dbc 1143 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1144 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1145 if (ret != 0)
1146 return ret;
2ced46c2
TM		 1147 if (newstate != state)
1148 return -ESTALE;
864472e9
TM		 1149 }
1150 if (state->n_rdonly != 0) {
b0ed9dbc 1151 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1152 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1153 if (ret != 0)
1154 return ret;
2ced46c2
TM		 1155 if (newstate != state)
1156 return -ESTALE;
864472e9 1157 }
1ac7e2fd
TM		 1158 /*
1159 * We may have performed cached opens for all three recoveries.
1160 * Check if we need to update the current stateid.
1161 */
1162 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1163 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1164 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1166 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1167 write_sequnlock(&state->seqlock);
1ac7e2fd 1168 }
864472e9
TM		 1169 return 0;
1170}
1171
1da177e4
LT		 1172/*
1173 * OPEN_RECLAIM:
1174 * reclaim state on the server after a reboot.
1da177e4 1175 */
539cd03a 1176static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1177{
1ac7e2fd 1178 struct nfs_delegation *delegation;
864472e9 1179 struct nfs4_opendata *opendata;
dc0b027d 1180 fmode_t delegation_type = 0;
1da177e4
LT		 1181 int status;
1182
6f220ed5
TM		 1183 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1184 if (IS_ERR(opendata))
1185 return PTR_ERR(opendata);
864472e9
TM		 1186 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1187 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1188 rcu_read_lock();
1189 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1190 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1191 delegation_type = delegation->type;
1ac7e2fd 1192 rcu_read_unlock();
864472e9
TM		 1193 opendata->o_arg.u.delegation_type = delegation_type;
1194 status = nfs4_open_recover(opendata, state);
c6d00e63 1195 nfs4_opendata_put(opendata);
1da177e4
LT		 1196 return status;
1197}
1198
539cd03a 1199static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1200{
1201 struct nfs_server *server = NFS_SERVER(state->inode);
1202 struct nfs4_exception exception = { };
1203 int err;
1204 do {
539cd03a 1205 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1206 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1207 break;
1208 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1209 } while (exception.retry);
1210 return err;
1211}
1212
864472e9
TM		 1213static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1214{
1215 struct nfs_open_context *ctx;
1216 int ret;
1217
1218 ctx = nfs4_state_find_open_context(state);
1219 if (IS_ERR(ctx))
1220 return PTR_ERR(ctx);
539cd03a 1221 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1222 put_nfs_open_context(ctx);
1223 return ret;
1224}
1225
13437e12 1226static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1227{
e56e0b78 1228 struct nfs4_opendata *opendata;
864472e9 1229 int ret;
1da177e4 1230
6f220ed5
TM		 1231 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1232 if (IS_ERR(opendata))
1233 return PTR_ERR(opendata);
e56e0b78 1234 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1235 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1236 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1237 ret = nfs4_open_recover(opendata, state);
c6d00e63 1238 nfs4_opendata_put(opendata);
864472e9 1239 return ret;
1da177e4
LT		 1240}
1241
13437e12 1242int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1243{
1244 struct nfs4_exception exception = { };
539cd03a 1245 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1246 int err;
1247 do {
13437e12 1248 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1249 switch (err) {
1250 case 0:
965b5d67
TM		 1251 case -ENOENT:
1252 case -ESTALE:
1253 goto out;
bcfa49f6
RL		 1254 case -NFS4ERR_BADSESSION:
1255 case -NFS4ERR_BADSLOT:
1256 case -NFS4ERR_BAD_HIGH_SLOT:
1257 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1258 case -NFS4ERR_DEADSESSION:
1259 nfs4_schedule_state_recovery(
1260 server->nfs_client);
1261 goto out;
1da177e4
LT		 1262 case -NFS4ERR_STALE_CLIENTID:
1263 case -NFS4ERR_STALE_STATEID:
1264 case -NFS4ERR_EXPIRED:
1265 /* Don't recall a delegation if it was lost */
7539bbab 1266 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1267 goto out;
1268 case -ERESTARTSYS:
1269 /*
1270 * The show must go on: exit, but mark the
1271 * stateid as needing recovery.
1272 */
1273 case -NFS4ERR_ADMIN_REVOKED:
1274 case -NFS4ERR_BAD_STATEID:
1275 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
168667c4
TM		 1276 case -EKEYEXPIRED:
1277 /*
1278 * User RPCSEC_GSS context has expired.
1279 * We cannot recover this stateid now, so
1280 * skip it and allow recovery thread to
1281 * proceed.
1282 */
965b5d67
TM		 1283 case -ENOMEM:
1284 err = 0;
1285 goto out;
1da177e4
LT		 1286 }
1287 err = nfs4_handle_exception(server, err, &exception);
1288 } while (exception.retry);
965b5d67 1289out:
1da177e4
LT		 1290 return err;
1291}
1292
cdd4e68b
TM		 1293static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1294{
1295 struct nfs4_opendata *data = calldata;
1296
1297 data->rpc_status = task->tk_status;
26e976a8 1298 if (data->rpc_status == 0) {
cdd4e68b
TM		 1299 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1300 sizeof(data->o_res.stateid.data));
bb22629e 1301 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1302 renew_lease(data->o_res.server, data->timestamp);
3e309914 1303 data->rpc_done = 1;
26e976a8 1304 }
cdd4e68b
TM		 1305}
1306
1307static void nfs4_open_confirm_release(void *calldata)
1308{
1309 struct nfs4_opendata *data = calldata;
1310 struct nfs4_state *state = NULL;
1311
1312 /* If this request hasn't been cancelled, do nothing */
1313 if (data->cancelled == 0)
1314 goto out_free;
1315 /* In case of error, no cleanup! */
3e309914 1316 if (!data->rpc_done)
cdd4e68b 1317 goto out_free;
cdd4e68b 1318 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1319 if (!IS_ERR(state))
dc0b027d 1320 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1321out_free:
c6d00e63 1322 nfs4_opendata_put(data);
cdd4e68b
TM		 1323}
1324
1325static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1326 .rpc_call_done = nfs4_open_confirm_done,
1327 .rpc_release = nfs4_open_confirm_release,
1328};
1329
1330/*
1331 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1332 */
1333static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1334{
1335 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1336 struct rpc_task *task;
5138fde0
TM		 1337 struct rpc_message msg = {
1338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1339 .rpc_argp = &data->c_arg,
1340 .rpc_resp = &data->c_res,
1341 .rpc_cred = data->owner->so_cred,
1342 };
c970aa85
TM		 1343 struct rpc_task_setup task_setup_data = {
1344 .rpc_client = server->client,
5138fde0 1345 .rpc_message = &msg,
c970aa85
TM		 1346 .callback_ops = &nfs4_open_confirm_ops,
1347 .callback_data = data,
101070ca 1348 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1349 .flags = RPC_TASK_ASYNC,
1350 };
1da177e4
LT		 1351 int status;
1352
c6d00e63 1353 kref_get(&data->kref);
3e309914
TM		 1354 data->rpc_done = 0;
1355 data->rpc_status = 0;
5138fde0 1356 data->timestamp = jiffies;
c970aa85 1357 task = rpc_run_task(&task_setup_data);
7a1218a2 1358 if (IS_ERR(task))
cdd4e68b 1359 return PTR_ERR(task);
cdd4e68b
TM		 1360 status = nfs4_wait_for_completion_rpc_task(task);
1361 if (status != 0) {
1362 data->cancelled = 1;
1363 smp_wmb();
1364 } else
1365 status = data->rpc_status;
e6b3c4db 1366 rpc_put_task(task);
1da177e4
LT		 1367 return status;
1368}
1369
24ac23ab 1370static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1371{
24ac23ab
TM		 1372 struct nfs4_opendata *data = calldata;
1373 struct nfs4_state_owner *sp = data->owner;
5138fde0 1374
24ac23ab
TM		 1375 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1376 return;
aac00a8d
TM		 1377 /*
1378 * Check if we still need to send an OPEN call, or if we can use
1379 * a delegation instead.
1380 */
1381 if (data->state != NULL) {
1382 struct nfs_delegation *delegation;
1383
dc0b027d 1384 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1385 goto out_no_action;
aac00a8d
TM		 1386 rcu_read_lock();
1387 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1388 if (delegation != NULL &&
15c831bf 1389 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1390 rcu_read_unlock();
6ee41268 1391 goto out_no_action;
aac00a8d
TM		 1392 }
1393 rcu_read_unlock();
1394 }
24ac23ab 1395 /* Update sequence id. */
9f958ab8 1396 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1397 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1398 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1399 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1400 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1401 }
26e976a8 1402 data->timestamp = jiffies;
035168ab 1403 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1404 &data->o_arg.seq_args,
1405 &data->o_res.seq_res, 1, task))
1406 return;
5138fde0 1407 rpc_call_start(task);
6ee41268
TM		 1408 return;
1409out_no_action:
1410 task->tk_action = NULL;
1411
24ac23ab 1412}
1da177e4 1413
b257957e
AB		 1414static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1415{
1416 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1417 nfs4_open_prepare(task, calldata);
1418}
1419
24ac23ab
TM		 1420static void nfs4_open_done(struct rpc_task *task, void *calldata)
1421{
1422 struct nfs4_opendata *data = calldata;
1da177e4 1423
24ac23ab 1424 data->rpc_status = task->tk_status;
d898528c 1425
14516c3a
TM		 1426 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1427 return;
d898528c 1428
24ac23ab
TM		 1429 if (task->tk_status == 0) {
1430 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1431 case S_IFREG:
1432 break;
1433 case S_IFLNK:
24ac23ab 1434 data->rpc_status = -ELOOP;
6f926b5b
TM		 1435 break;
1436 case S_IFDIR:
24ac23ab 1437 data->rpc_status = -EISDIR;
6f926b5b
TM		 1438 break;
1439 default:
24ac23ab 1440 data->rpc_status = -ENOTDIR;
6f926b5b 1441 }
26e976a8 1442 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1443 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1444 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1445 }
3e309914 1446 data->rpc_done = 1;
24ac23ab 1447}
6f926b5b 1448
24ac23ab
TM		 1449static void nfs4_open_release(void *calldata)
1450{
1451 struct nfs4_opendata *data = calldata;
1452 struct nfs4_state *state = NULL;
1453
1454 /* If this request hasn't been cancelled, do nothing */
1455 if (data->cancelled == 0)
1456 goto out_free;
1457 /* In case of error, no cleanup! */
3e309914 1458 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1459 goto out_free;
1460 /* In case we need an open_confirm, no cleanup! */
1461 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1462 goto out_free;
24ac23ab 1463 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1464 if (!IS_ERR(state))
dc0b027d 1465 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1466out_free:
c6d00e63 1467 nfs4_opendata_put(data);
24ac23ab
TM		 1468}
1469
1470static const struct rpc_call_ops nfs4_open_ops = {
1471 .rpc_call_prepare = nfs4_open_prepare,
1472 .rpc_call_done = nfs4_open_done,
1473 .rpc_release = nfs4_open_release,
1474};
1475
b257957e
AB		 1476static const struct rpc_call_ops nfs4_recover_open_ops = {
1477 .rpc_call_prepare = nfs4_recover_open_prepare,
1478 .rpc_call_done = nfs4_open_done,
1479 .rpc_release = nfs4_open_release,
1480};
1481
1482static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1483{
1484 struct inode *dir = data->dir->d_inode;
1485 struct nfs_server *server = NFS_SERVER(dir);
1486 struct nfs_openargs *o_arg = &data->o_arg;
1487 struct nfs_openres *o_res = &data->o_res;
1488 struct rpc_task *task;
5138fde0
TM		 1489 struct rpc_message msg = {
1490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1491 .rpc_argp = o_arg,
1492 .rpc_resp = o_res,
1493 .rpc_cred = data->owner->so_cred,
1494 };
c970aa85
TM		 1495 struct rpc_task_setup task_setup_data = {
1496 .rpc_client = server->client,
5138fde0 1497 .rpc_message = &msg,
c970aa85
TM		 1498 .callback_ops = &nfs4_open_ops,
1499 .callback_data = data,
101070ca 1500 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1501 .flags = RPC_TASK_ASYNC,
1502 };
24ac23ab
TM		 1503 int status;
1504
c6d00e63 1505 kref_get(&data->kref);
3e309914
TM		 1506 data->rpc_done = 0;
1507 data->rpc_status = 0;
2ced46c2 1508 data->cancelled = 0;
b257957e
AB		 1509 if (isrecover)
1510 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1511 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1512 if (IS_ERR(task))
1513 return PTR_ERR(task);
1514 status = nfs4_wait_for_completion_rpc_task(task);
1515 if (status != 0) {
1516 data->cancelled = 1;
1517 smp_wmb();
1518 } else
1519 status = data->rpc_status;
1520 rpc_put_task(task);
1521
1522 return status;
1523}
1524
1525static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1526{
1527 struct inode *dir = data->dir->d_inode;
1528 struct nfs_openres *o_res = &data->o_res;
1529 int status;
1530
1531 status = nfs4_run_open_task(data, 1);
1532 if (status != 0 || !data->rpc_done)
1533 return status;
1534
1535 nfs_refresh_inode(dir, o_res->dir_attr);
1536
1537 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1538 status = _nfs4_proc_open_confirm(data);
1539 if (status != 0)
1540 return status;
1541 }
1542
1543 return status;
1544}
1545
1546/*
1547 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1548 */
1549static int _nfs4_proc_open(struct nfs4_opendata *data)
1550{
1551 struct inode *dir = data->dir->d_inode;
1552 struct nfs_server *server = NFS_SERVER(dir);
1553 struct nfs_openargs *o_arg = &data->o_arg;
1554 struct nfs_openres *o_res = &data->o_res;
1555 int status;
1556
1557 status = nfs4_run_open_task(data, 0);
3e309914 1558 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1559 return status;
1560
56ae19f3
TM		 1561 if (o_arg->open_flags & O_CREAT) {
1562 update_changeattr(dir, &o_res->cinfo);
1563 nfs_post_op_update_inode(dir, o_res->dir_attr);
1564 } else
1565 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1566 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1567 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1568 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1569 status = _nfs4_proc_open_confirm(data);
1da177e4 1570 if (status != 0)
24ac23ab 1571 return status;
1da177e4
LT		 1572 }
1573 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1574 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1575 return 0;
1da177e4
LT		 1576}
1577
10afec90 1578static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1579{
7539bbab 1580 struct nfs_client *clp = server->nfs_client;
a78cb57a 1581 unsigned int loop;
6b30954e 1582 int ret;
58d9714a 1583
a78cb57a 1584 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1585 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1586 if (ret != 0)
a78cb57a 1587 break;
e598d843
TM		 1588 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1589 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1590 break;
58d9714a 1591 nfs4_schedule_state_recovery(clp);
a78cb57a 1592 ret = -EIO;
6b30954e 1593 }
a78cb57a 1594 return ret;
58d9714a
TM		 1595}
1596
1da177e4
LT		 1597/*
1598 * OPEN_EXPIRED:
1599 * reclaim state on the server after a network partition.
1600 * Assumes caller holds the appropriate lock
1601 */
539cd03a 1602static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1603{
e56e0b78 1604 struct nfs4_opendata *opendata;
864472e9 1605 int ret;
1da177e4 1606
6f220ed5
TM		 1607 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1608 if (IS_ERR(opendata))
1609 return PTR_ERR(opendata);
864472e9 1610 ret = nfs4_open_recover(opendata, state);
35d05778 1611 if (ret == -ESTALE)
539cd03a 1612 d_drop(ctx->path.dentry);
c6d00e63 1613 nfs4_opendata_put(opendata);
864472e9 1614 return ret;
1da177e4
LT		 1615}
1616
a9ed2e25 1617static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1618{
539cd03a 1619 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1620 struct nfs4_exception exception = { };
1621 int err;
1622
1623 do {
539cd03a 1624 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1625 switch (err) {
1626 default:
1627 goto out;
1628 case -NFS4ERR_GRACE:
1629 case -NFS4ERR_DELAY:
1630 nfs4_handle_exception(server, err, &exception);
1631 err = 0;
1632 }
202b50dc 1633 } while (exception.retry);
a9ed2e25 1634out:
202b50dc
TM		 1635 return err;
1636}
1637
1da177e4
LT		 1638static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1639{
1da177e4 1640 struct nfs_open_context *ctx;
864472e9 1641 int ret;
1da177e4 1642
864472e9
TM		 1643 ctx = nfs4_state_find_open_context(state);
1644 if (IS_ERR(ctx))
1645 return PTR_ERR(ctx);
539cd03a 1646 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1647 put_nfs_open_context(ctx);
1648 return ret;
1da177e4
LT		 1649}
1650
aa53ed54
JL		 1651/*
1652 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1653 * fields corresponding to attributes that were used to store the verifier.
1654 * Make sure we clobber those fields in the later setattr call
1655 */
1656static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1657{
1658 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1659 !(sattr->ia_valid & ATTR_ATIME_SET))
1660 sattr->ia_valid |= ATTR_ATIME;
1661
1662 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1663 !(sattr->ia_valid & ATTR_MTIME_SET))
1664 sattr->ia_valid |= ATTR_MTIME;
1665}
1666
1da177e4 1667/*
24ac23ab 1668 * Returns a referenced nfs4_state
1da177e4 1669 */
dc0b027d 1670static 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		 1671{
1672 struct nfs4_state_owner *sp;
1673 struct nfs4_state *state = NULL;
1674 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1675 struct nfs4_opendata *opendata;
aac00a8d 1676 int status;
1da177e4
LT		 1677
1678 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1679 status = -ENOMEM;
1680 if (!(sp = nfs4_get_state_owner(server, cred))) {
1681 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1682 goto out_err;
1683 }
58d9714a
TM		 1684 status = nfs4_recover_expired_lease(server);
1685 if (status != 0)
b4454fe1 1686 goto err_put_state_owner;
aac00a8d 1687 if (path->dentry->d_inode != NULL)
dc0b027d 1688 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1689 status = -ENOMEM;
8535b2be 1690 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1691 if (opendata == NULL)
95d35cb4 1692 goto err_put_state_owner;
1da177e4 1693
aac00a8d
TM		 1694 if (path->dentry->d_inode != NULL)
1695 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1696
24ac23ab 1697 status = _nfs4_proc_open(opendata);
1da177e4 1698 if (status != 0)
c6d00e63 1699 goto err_opendata_put;
1da177e4 1700
24ac23ab 1701 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1702 status = PTR_ERR(state);
1703 if (IS_ERR(state))
c6d00e63 1704 goto err_opendata_put;
0df5dd4a 1705 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1706 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1707
1708 if (opendata->o_arg.open_flags & O_EXCL) {
1709 nfs4_exclusive_attrset(opendata, sattr);
1710
1711 nfs_fattr_init(opendata->o_res.f_attr);
1712 status = nfs4_do_setattr(state->inode, cred,
1713 opendata->o_res.f_attr, sattr,
1714 state);
1715 if (status == 0)
1716 nfs_setattr_update_inode(state->inode, sattr);
1717 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1718 }
c6d00e63 1719 nfs4_opendata_put(opendata);
1da177e4 1720 nfs4_put_state_owner(sp);
1da177e4
LT		 1721 *res = state;
1722 return 0;
c6d00e63
TM		 1723err_opendata_put:
1724 nfs4_opendata_put(opendata);
e56e0b78
TM		 1725err_put_state_owner:
1726 nfs4_put_state_owner(sp);
1da177e4 1727out_err:
1da177e4
LT		 1728 *res = NULL;
1729 return status;
1730}
1731
1732
dc0b027d 1733static 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		 1734{
1735 struct nfs4_exception exception = { };
1736 struct nfs4_state *res;
1737 int status;
1738
1739 do {
dc0b027d 1740 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1741 if (status == 0)
1742 break;
1743 /* NOTE: BAD_SEQID means the server and client disagree about the
1744 * book-keeping w.r.t. state-changing operations
1745 * (OPEN/CLOSE/LOCK/LOCKU...)
1746 * It is actually a sign of a bug on the client or on the server.
1747 *
1748 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1749 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1750 * have unhashed the old state_owner for us, and that we can
1751 * therefore safely retry using a new one. We should still warn
1752 * the user though...
1753 */
1754 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1755 printk(KERN_WARNING "NFS: v4 server %s "
1756 " returned a bad sequence-id error!\n",
1757 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1758 exception.retry = 1;
1759 continue;
1760 }
550f5747
TM		 1761 /*
1762 * BAD_STATEID on OPEN means that the server cancelled our
1763 * state before it received the OPEN_CONFIRM.
1764 * Recover by retrying the request as per the discussion
1765 * on Page 181 of RFC3530.
1766 */
1767 if (status == -NFS4ERR_BAD_STATEID) {
1768 exception.retry = 1;
1769 continue;
1770 }
aac00a8d
TM		 1771 if (status == -EAGAIN) {
1772 /* We must have found a delegation */
1773 exception.retry = 1;
1774 continue;
1775 }
1da177e4
LT		 1776 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1777 status, &exception));
1778 } while (exception.retry);
1779 return res;
1780}
1781
659bfcd6
TM		 1782static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1783 struct nfs_fattr *fattr, struct iattr *sattr,
1784 struct nfs4_state *state)
1da177e4 1785{
3e4f6290 1786 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1787 struct nfs_setattrargs arg = {
3e4f6290 1788 .fh = NFS_FH(inode),
1da177e4
LT		 1789 .iap = sattr,
1790 .server = server,
1791 .bitmask = server->attr_bitmask,
1792 };
1793 struct nfs_setattrres res = {
1794 .fattr = fattr,
1795 .server = server,
1796 };
1797 struct rpc_message msg = {
659bfcd6
TM		 1798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1799 .rpc_argp = &arg,
1800 .rpc_resp = &res,
1801 .rpc_cred = cred,
1da177e4 1802 };
26e976a8 1803 unsigned long timestamp = jiffies;
65e4308d 1804 int status;
1da177e4 1805
0e574af1 1806 nfs_fattr_init(fattr);
1da177e4 1807
3e4f6290
TM		 1808 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1809 /* Use that stateid */
1810 } else if (state != NULL) {
77041ed9 1811 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1812 } else
1da177e4
LT		 1813 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1814
cccef3b9 1815 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1816 if (status == 0 && state != NULL)
1817 renew_lease(server, timestamp);
65e4308d 1818 return status;
1da177e4
LT		 1819}
1820
659bfcd6
TM		 1821static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1822 struct nfs_fattr *fattr, struct iattr *sattr,
1823 struct nfs4_state *state)
1da177e4 1824{
3e4f6290 1825 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1826 struct nfs4_exception exception = { };
1827 int err;
1828 do {
1829 err = nfs4_handle_exception(server,
659bfcd6 1830 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1831 &exception);
1832 } while (exception.retry);
1833 return err;
1834}
1835
1836struct nfs4_closedata {
4a35bd41 1837 struct path path;
1da177e4
LT		 1838 struct inode *inode;
1839 struct nfs4_state *state;
1840 struct nfs_closeargs arg;
1841 struct nfs_closeres res;
516a6af6 1842 struct nfs_fattr fattr;
26e976a8 1843 unsigned long timestamp;
f7e8917a
FI		 1844 bool roc;
1845 u32 roc_barrier;
1da177e4
LT		 1846};
1847
963d8fe5 1848static void nfs4_free_closedata(void *data)
9512135d 1849{
963d8fe5
TM		 1850 struct nfs4_closedata *calldata = data;
1851 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1852
f7e8917a
FI		 1853 if (calldata->roc)
1854 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1855 nfs4_put_open_state(calldata->state);
1856 nfs_free_seqid(calldata->arg.seqid);
9512135d 1857 nfs4_put_state_owner(sp);
31f31db1 1858 path_put(&calldata->path);
9512135d
TM		 1859 kfree(calldata);
1860}
1861
88069f77
TM		 1862static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1863 fmode_t fmode)
1864{
1865 spin_lock(&state->owner->so_lock);
1866 if (!(fmode & FMODE_READ))
1867 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1868 if (!(fmode & FMODE_WRITE))
1869 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1870 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1871 spin_unlock(&state->owner->so_lock);
1872}
1873
963d8fe5 1874static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1875{
963d8fe5 1876 struct nfs4_closedata *calldata = data;
1da177e4 1877 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1878 struct nfs_server *server = NFS_SERVER(calldata->inode);
1879
14516c3a
TM		 1880 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1881 return;
1da177e4
LT		 1882 /* hmm. we are done with the inode, and in the process of freeing
1883 * the state_owner. we keep this around to process errors
1884 */
1da177e4
LT		 1885 switch (task->tk_status) {
1886 case 0:
f7e8917a
FI		 1887 if (calldata->roc)
1888 pnfs_roc_set_barrier(state->inode,
1889 calldata->roc_barrier);
45328c35 1890 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1891 renew_lease(server, calldata->timestamp);
88069f77
TM		 1892 nfs4_close_clear_stateid_flags(state,
1893 calldata->arg.fmode);
1da177e4
LT		 1894 break;
1895 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1896 case -NFS4ERR_OLD_STATEID:
1897 case -NFS4ERR_BAD_STATEID:
1da177e4 1898 case -NFS4ERR_EXPIRED:
dc0b027d 1899 if (calldata->arg.fmode == 0)
9e33bed5 1900 break;
1da177e4 1901 default:
72211dbe
TM		 1902 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1903 rpc_restart_call_prepare(task);
1da177e4 1904 }
72211dbe 1905 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1906 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1907}
1908
4ce70ada 1909static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1910{
4ce70ada 1911 struct nfs4_closedata *calldata = data;
9512135d 1912 struct nfs4_state *state = calldata->state;
88069f77 1913 int call_close = 0;
9512135d 1914
963d8fe5 1915 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1916 return;
003707c7 1917
88069f77
TM		 1918 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1919 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1920 spin_lock(&state->owner->so_lock);
003707c7 1921 /* Calculate the change in open mode */
e7616923 1922 if (state->n_rdwr == 0) {
003707c7 1923 if (state->n_rdonly == 0) {
88069f77
TM		 1924 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1925 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1926 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1927 }
1928 if (state->n_wronly == 0) {
88069f77
TM		 1929 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1930 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1931 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1932 }
e7616923 1933 }
4cecb76f 1934 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1935
1936 if (!call_close) {
963d8fe5
TM		 1937 /* Note: exit _without_ calling nfs4_close_done */
1938 task->tk_action = NULL;
9512135d
TM		 1939 return;
1940 }
88069f77 1941
f7e8917a 1942 if (calldata->arg.fmode == 0) {
88069f77 1943 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1944 if (calldata->roc &&
1945 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1946 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1947 task, NULL);
1948 return;
1949 }
1950 }
88069f77 1951
516a6af6 1952 nfs_fattr_init(calldata->res.fattr);
26e976a8 1953 calldata->timestamp = jiffies;
035168ab 1954 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1955 &calldata->arg.seq_args, &calldata->res.seq_res,
1956 1, task))
1957 return;
5138fde0 1958 rpc_call_start(task);
1da177e4
LT		 1959}
1960
963d8fe5 1961static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1962 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1963 .rpc_call_done = nfs4_close_done,
1964 .rpc_release = nfs4_free_closedata,
1965};
1966
1da177e4
LT		 1967/*
1968 * It is possible for data to be read/written from a mem-mapped file
1969 * after the sys_close call (which hits the vfs layer as a flush).
1970 * This means that we can't safely call nfsv4 close on a file until
1971 * the inode is cleared. This in turn means that we are not good
1972 * NFSv4 citizens - we do not indicate to the server to update the file's
1973 * share state even when we are done with one of the three share
1974 * stateid's in the inode.
1975 *
1976 * NOTE: Caller must be holding the sp->so_owner semaphore!
1977 */
f7e8917a 1978int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 1979{
4a35bd41 1980 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1981 struct nfs4_closedata *calldata;
b39e625b
TM		 1982 struct nfs4_state_owner *sp = state->owner;
1983 struct rpc_task *task;
5138fde0
TM		 1984 struct rpc_message msg = {
1985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1986 .rpc_cred = state->owner->so_cred,
1987 };
c970aa85
TM		 1988 struct rpc_task_setup task_setup_data = {
1989 .rpc_client = server->client,
5138fde0 1990 .rpc_message = &msg,
c970aa85 1991 .callback_ops = &nfs4_close_ops,
101070ca 1992 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1993 .flags = RPC_TASK_ASYNC,
1994 };
9512135d 1995 int status = -ENOMEM;
1da177e4 1996
8535b2be 1997 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1998 if (calldata == NULL)
9512135d 1999 goto out;
4a35bd41 2000 calldata->inode = state->inode;
1da177e4 2001 calldata->state = state;
4a35bd41 2002 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2003 calldata->arg.stateid = &state->open_stateid;
1da177e4 2004 /* Serialization for the sequence id */
8535b2be 2005 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2006 if (calldata->arg.seqid == NULL)
2007 goto out_free_calldata;
dc0b027d 2008 calldata->arg.fmode = 0;
a65318bf 2009 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2010 calldata->res.fattr = &calldata->fattr;
c1d51931 2011 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2012 calldata->res.server = server;
f7e8917a 2013 calldata->roc = roc;
f6948697
AV		 2014 path_get(path);
2015 calldata->path = *path;
9512135d 2016
1174dd1f
TM		 2017 msg.rpc_argp = &calldata->arg;
2018 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2019 task_setup_data.callback_data = calldata;
2020 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2021 if (IS_ERR(task))
2022 return PTR_ERR(task);
a49c3c77
TM		 2023 status = 0;
2024 if (wait)
2025 status = rpc_wait_for_completion_task(task);
b39e625b 2026 rpc_put_task(task);
a49c3c77 2027 return status;
9512135d
TM		 2028out_free_calldata:
2029 kfree(calldata);
2030out:
f7e8917a
FI		 2031 if (roc)
2032 pnfs_roc_release(state->inode);
b39e625b
TM		 2033 nfs4_put_open_state(state);
2034 nfs4_put_state_owner(sp);
9512135d 2035 return status;
1da177e4
LT		 2036}
2037
2b484297 2038static struct inode *
cd9a1c0e 2039nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2040{
1da177e4 2041 struct nfs4_state *state;
1da177e4 2042
565277f6 2043 /* Protect against concurrent sillydeletes */
cd9a1c0e 2044 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2045 if (IS_ERR(state))
2046 return ERR_CAST(state);
cd9a1c0e 2047 ctx->state = state;
f46e0bd3 2048 return igrab(state->inode);
1da177e4
LT		 2049}
2050
1185a552 2051static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2052{
2053 if (ctx->state == NULL)
2054 return;
2055 if (is_sync)
2056 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2057 else
2058 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2059}
1da177e4
LT		 2060
2061static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2062{
43652ad5
BH		 2063 struct nfs4_server_caps_arg args = {
2064 .fhandle = fhandle,
2065 };
1da177e4
LT		 2066 struct nfs4_server_caps_res res = {};
2067 struct rpc_message msg = {
2068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2069 .rpc_argp = &args,
1da177e4
LT		 2070 .rpc_resp = &res,
2071 };
2072 int status;
2073
cccef3b9 2074 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2075 if (status == 0) {
2076 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2077 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2078 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2079 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2080 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2081 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2082 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2083 server->caps |= NFS_CAP_ACLS;
2084 if (res.has_links != 0)
2085 server->caps |= NFS_CAP_HARDLINKS;
2086 if (res.has_symlinks != 0)
2087 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2088 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2089 server->caps |= NFS_CAP_FILEID;
2090 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2091 server->caps |= NFS_CAP_MODE;
2092 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2093 server->caps |= NFS_CAP_NLINK;
2094 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2095 server->caps |= NFS_CAP_OWNER;
2096 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2097 server->caps |= NFS_CAP_OWNER_GROUP;
2098 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2099 server->caps |= NFS_CAP_ATIME;
2100 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2101 server->caps |= NFS_CAP_CTIME;
2102 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2103 server->caps |= NFS_CAP_MTIME;
2104
a65318bf
TM		 2105 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2106 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2107 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2108 server->acl_bitmask = res.acl_bitmask;
2109 }
cccef3b9 2110
1da177e4
LT		 2111 return status;
2112}
2113
55a97593 2114int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2115{
2116 struct nfs4_exception exception = { };
2117 int err;
2118 do {
2119 err = nfs4_handle_exception(server,
2120 _nfs4_server_capabilities(server, fhandle),
2121 &exception);
2122 } while (exception.retry);
2123 return err;
2124}
2125
2126static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2127 struct nfs_fsinfo *info)
2128{
1da177e4
LT		 2129 struct nfs4_lookup_root_arg args = {
2130 .bitmask = nfs4_fattr_bitmap,
2131 };
2132 struct nfs4_lookup_res res = {
2133 .server = server,
0e574af1 2134 .fattr = info->fattr,
1da177e4
LT		 2135 .fh = fhandle,
2136 };
2137 struct rpc_message msg = {
2138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2139 .rpc_argp = &args,
2140 .rpc_resp = &res,
2141 };
008f55d0 2142
0e574af1 2143 nfs_fattr_init(info->fattr);
fccba804 2144 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2145}
2146
2147static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2148 struct nfs_fsinfo *info)
2149{
2150 struct nfs4_exception exception = { };
2151 int err;
2152 do {
2153 err = nfs4_handle_exception(server,
2154 _nfs4_lookup_root(server, fhandle, info),
2155 &exception);
2156 } while (exception.retry);
2157 return err;
2158}
2159
54ceac45
DH		 2160/*
2161 * get the file handle for the "/" directory on the server
2162 */
1da177e4 2163static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2164 struct nfs_fsinfo *info)
1da177e4 2165{
1da177e4
LT		 2166 int status;
2167
1da177e4 2168 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2169 if (status == 0)
2170 status = nfs4_server_capabilities(server, fhandle);
2171 if (status == 0)
2172 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2173 return nfs4_map_errors(status);
1da177e4
LT		 2174}
2175
6b97fd3d
MN		 2176/*
2177 * Get locations and (maybe) other attributes of a referral.
2178 * Note that we'll actually follow the referral later when
2179 * we detect fsid mismatch in inode revalidation
2180 */
56659e99 2181static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2182{
2183 int status = -ENOMEM;
2184 struct page *page = NULL;
2185 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2186
2187 page = alloc_page(GFP_KERNEL);
2188 if (page == NULL)
2189 goto out;
2190 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2191 if (locations == NULL)
2192 goto out;
2193
c228fd3a 2194 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2195 if (status != 0)
2196 goto out;
2197 /* Make sure server returned a different fsid for the referral */
2198 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2199 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2200 status = -EIO;
2201 goto out;
2202 }
2203
2204 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2205 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2206 if (!fattr->mode)
2207 fattr->mode = S_IFDIR;
2208 memset(fhandle, 0, sizeof(struct nfs_fh));
2209out:
2210 if (page)
2211 __free_page(page);
5d7ca35a 2212 kfree(locations);
6b97fd3d
MN		 2213 return status;
2214}
2215
1da177e4
LT		 2216static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2217{
2218 struct nfs4_getattr_arg args = {
2219 .fh = fhandle,
2220 .bitmask = server->attr_bitmask,
2221 };
2222 struct nfs4_getattr_res res = {
2223 .fattr = fattr,
2224 .server = server,
2225 };
2226 struct rpc_message msg = {
2227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2228 .rpc_argp = &args,
2229 .rpc_resp = &res,
2230 };
2231
0e574af1 2232 nfs_fattr_init(fattr);
cccef3b9 2233 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2234}
2235
2236static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2237{
2238 struct nfs4_exception exception = { };
2239 int err;
2240 do {
2241 err = nfs4_handle_exception(server,
2242 _nfs4_proc_getattr(server, fhandle, fattr),
2243 &exception);
2244 } while (exception.retry);
2245 return err;
2246}
2247
2248/*
2249 * The file is not closed if it is opened due to the a request to change
2250 * the size of the file. The open call will not be needed once the
2251 * VFS layer lookup-intents are implemented.
2252 *
2253 * Close is called when the inode is destroyed.
2254 * If we haven't opened the file for O_WRONLY, we
2255 * need to in the size_change case to obtain a stateid.
2256 *
2257 * Got race?
2258 * Because OPEN is always done by name in nfsv4, it is
2259 * possible that we opened a different file by the same
2260 * name. We can recognize this race condition, but we
2261 * can't do anything about it besides returning an error.
2262 *
2263 * This will be fixed with VFS changes (lookup-intent).
2264 */
2265static int
2266nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2267 struct iattr *sattr)
2268{
08e9eac4 2269 struct inode *inode = dentry->d_inode;
659bfcd6 2270 struct rpc_cred *cred = NULL;
d530838b 2271 struct nfs4_state *state = NULL;
1da177e4
LT		 2272 int status;
2273
0e574af1 2274 nfs_fattr_init(fattr);
1da177e4 2275
d530838b 2276 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2277 if (sattr->ia_valid & ATTR_FILE) {
2278 struct nfs_open_context *ctx;
2279
2280 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2281 if (ctx) {
2282 cred = ctx->cred;
2283 state = ctx->state;
2284 }
659bfcd6 2285 }
08e9eac4 2286
659bfcd6 2287 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2288 if (status == 0)
2289 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2290 return status;
2291}
2292
56659e99
TM		 2293static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2294 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2295 struct nfs_fattr *fattr)
2296{
2297 int status;
2298 struct nfs4_lookup_arg args = {
2299 .bitmask = server->attr_bitmask,
2300 .dir_fh = dirfh,
2301 .name = name,
2302 };
2303 struct nfs4_lookup_res res = {
2304 .server = server,
2305 .fattr = fattr,
2306 .fh = fhandle,
2307 };
2308 struct rpc_message msg = {
2309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2310 .rpc_argp = &args,
2311 .rpc_resp = &res,
2312 };
2313
2314 nfs_fattr_init(fattr);
2315
2316 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2317 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2318 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2319 return status;
2320}
2321
2322static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2323 struct qstr *name, struct nfs_fh *fhandle,
2324 struct nfs_fattr *fattr)
2325{
2326 struct nfs4_exception exception = { };
2327 int err;
2328 do {
4e56e082
TM		 2329 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2330 /* FIXME: !!!! */
2331 if (err == -NFS4ERR_MOVED) {
2332 err = -EREMOTE;
2333 break;
2334 }
2335 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2336 } while (exception.retry);
2337 return err;
2338}
2339
56659e99 2340static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2341 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2342{
4e56e082 2343 int status;
1da177e4
LT		 2344
2345 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2346 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2347 if (status == -NFS4ERR_MOVED)
2348 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2349 dprintk("NFS reply lookup: %d\n", status);
2350 return status;
2351}
2352
2353static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2354{
2355 struct nfs4_exception exception = { };
2356 int err;
2357 do {
2358 err = nfs4_handle_exception(NFS_SERVER(dir),
2359 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2360 &exception);
2361 } while (exception.retry);
2362 return err;
2363}
2364
2365static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2366{
76b32999 2367 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2368 struct nfs4_accessargs args = {
2369 .fh = NFS_FH(inode),
76b32999
TM		 2370 .bitmask = server->attr_bitmask,
2371 };
2372 struct nfs4_accessres res = {
2373 .server = server,
1da177e4 2374 };
1da177e4
LT		 2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2377 .rpc_argp = &args,
2378 .rpc_resp = &res,
2379 .rpc_cred = entry->cred,
2380 };
2381 int mode = entry->mask;
2382 int status;
2383
2384 /*
2385 * Determine which access bits we want to ask for...
2386 */
2387 if (mode & MAY_READ)
2388 args.access |= NFS4_ACCESS_READ;
2389 if (S_ISDIR(inode->i_mode)) {
2390 if (mode & MAY_WRITE)
2391 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2392 if (mode & MAY_EXEC)
2393 args.access |= NFS4_ACCESS_LOOKUP;
2394 } else {
2395 if (mode & MAY_WRITE)
2396 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2397 if (mode & MAY_EXEC)
2398 args.access |= NFS4_ACCESS_EXECUTE;
2399 }
c407d41a
TM		 2400
2401 res.fattr = nfs_alloc_fattr();
2402 if (res.fattr == NULL)
2403 return -ENOMEM;
2404
cccef3b9 2405 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2406 if (!status) {
2407 entry->mask = 0;
2408 if (res.access & NFS4_ACCESS_READ)
2409 entry->mask |= MAY_READ;
2410 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2411 entry->mask |= MAY_WRITE;
2412 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2413 entry->mask |= MAY_EXEC;
c407d41a 2414 nfs_refresh_inode(inode, res.fattr);
1da177e4 2415 }
c407d41a 2416 nfs_free_fattr(res.fattr);
1da177e4
LT		 2417 return status;
2418}
2419
2420static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2421{
2422 struct nfs4_exception exception = { };
2423 int err;
2424 do {
2425 err = nfs4_handle_exception(NFS_SERVER(inode),
2426 _nfs4_proc_access(inode, entry),
2427 &exception);
2428 } while (exception.retry);
2429 return err;
2430}
2431
2432/*
2433 * TODO: For the time being, we don't try to get any attributes
2434 * along with any of the zero-copy operations READ, READDIR,
2435 * READLINK, WRITE.
2436 *
2437 * In the case of the first three, we want to put the GETATTR
2438 * after the read-type operation -- this is because it is hard
2439 * to predict the length of a GETATTR response in v4, and thus
2440 * align the READ data correctly. This means that the GETATTR
2441 * may end up partially falling into the page cache, and we should
2442 * shift it into the 'tail' of the xdr_buf before processing.
2443 * To do this efficiently, we need to know the total length
2444 * of data received, which doesn't seem to be available outside
2445 * of the RPC layer.
2446 *
2447 * In the case of WRITE, we also want to put the GETATTR after
2448 * the operation -- in this case because we want to make sure
2449 * we get the post-operation mtime and size. This means that
2450 * we can't use xdr_encode_pages() as written: we need a variant
2451 * of it which would leave room in the 'tail' iovec.
2452 *
2453 * Both of these changes to the XDR layer would in fact be quite
2454 * minor, but I decided to leave them for a subsequent patch.
2455 */
2456static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2457 unsigned int pgbase, unsigned int pglen)
2458{
2459 struct nfs4_readlink args = {
2460 .fh = NFS_FH(inode),
2461 .pgbase = pgbase,
2462 .pglen = pglen,
2463 .pages = &page,
2464 };
f50c7000 2465 struct nfs4_readlink_res res;
1da177e4
LT		 2466 struct rpc_message msg = {
2467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2468 .rpc_argp = &args,
f50c7000 2469 .rpc_resp = &res,
1da177e4
LT		 2470 };
2471
cccef3b9 2472 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2473}
2474
2475static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2476 unsigned int pgbase, unsigned int pglen)
2477{
2478 struct nfs4_exception exception = { };
2479 int err;
2480 do {
2481 err = nfs4_handle_exception(NFS_SERVER(inode),
2482 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2483 &exception);
2484 } while (exception.retry);
2485 return err;
2486}
2487
1da177e4
LT		 2488/*
2489 * Got race?
2490 * We will need to arrange for the VFS layer to provide an atomic open.
2491 * Until then, this create/open method is prone to inefficiency and race
2492 * conditions due to the lookup, create, and open VFS calls from sys_open()
2493 * placed on the wire.
2494 *
2495 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2496 * The file will be opened again in the subsequent VFS open call
2497 * (nfs4_proc_file_open).
2498 *
2499 * The open for read will just hang around to be used by any process that
2500 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2501 */
2502
2503static int
2504nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2505 int flags, struct nfs_open_context *ctx)
1da177e4 2506{
c0204fd2 2507 struct path my_path = {
ad389da7
TM		 2508 .dentry = dentry,
2509 };
c0204fd2 2510 struct path *path = &my_path;
1da177e4 2511 struct nfs4_state *state;
c0204fd2
TM		 2512 struct rpc_cred *cred = NULL;
2513 fmode_t fmode = 0;
1da177e4
LT		 2514 int status = 0;
2515
c0204fd2
TM		 2516 if (ctx != NULL) {
2517 cred = ctx->cred;
2518 path = &ctx->path;
2519 fmode = ctx->mode;
1da177e4 2520 }
a8a5da99 2521 sattr->ia_mode &= ~current_umask();
c0204fd2 2522 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2523 d_drop(dentry);
1da177e4
LT		 2524 if (IS_ERR(state)) {
2525 status = PTR_ERR(state);
c0204fd2 2526 goto out;
1da177e4 2527 }
d4d9cdcb 2528 d_add(dentry, igrab(state->inode));
d75340cc 2529 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2530 if (ctx != NULL)
2531 ctx->state = state;
02a913a7 2532 else
c0204fd2 2533 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2534out:
2535 return status;
2536}
2537
2538static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2539{
16e42959 2540 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2541 struct nfs_removeargs args = {
1da177e4 2542 .fh = NFS_FH(dir),
4fdc17b2
TM		 2543 .name.len = name->len,
2544 .name.name = name->name,
16e42959
TM		 2545 .bitmask = server->attr_bitmask,
2546 };
4fdc17b2 2547 struct nfs_removeres res = {
16e42959 2548 .server = server,
1da177e4 2549 };
1da177e4 2550 struct rpc_message msg = {
4fdc17b2
TM		 2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2552 .rpc_argp = &args,
2553 .rpc_resp = &res,
1da177e4 2554 };
d346890b
TM		 2555 int status = -ENOMEM;
2556
2557 res.dir_attr = nfs_alloc_fattr();
2558 if (res.dir_attr == NULL)
2559 goto out;
1da177e4 2560
cccef3b9 2561 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2562 if (status == 0) {
2563 update_changeattr(dir, &res.cinfo);
d346890b 2564 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2565 }
d346890b
TM		 2566 nfs_free_fattr(res.dir_attr);
2567out:
1da177e4
LT		 2568 return status;
2569}
2570
2571static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2572{
2573 struct nfs4_exception exception = { };
2574 int err;
2575 do {
2576 err = nfs4_handle_exception(NFS_SERVER(dir),
2577 _nfs4_proc_remove(dir, name),
2578 &exception);
2579 } while (exception.retry);
2580 return err;
2581}
2582
e4eff1a6 2583static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2584{
e4eff1a6
TM		 2585 struct nfs_server *server = NFS_SERVER(dir);
2586 struct nfs_removeargs *args = msg->rpc_argp;
2587 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2588
a65318bf 2589 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2590 res->server = server;
dfb4f309 2591 res->seq_res.sr_slot = NULL;
1da177e4 2592 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2593}
2594
e4eff1a6 2595static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2596{
e4eff1a6
TM		 2597 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2598
14516c3a
TM		 2599 if (!nfs4_sequence_done(task, &res->seq_res))
2600 return 0;
9e33bed5 2601 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2602 return 0;
2603 update_changeattr(dir, &res->cinfo);
d346890b 2604 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2605 return 1;
1da177e4
LT		 2606}
2607
d3d4152a
JL		 2608static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2609{
2610 struct nfs_server *server = NFS_SERVER(dir);
2611 struct nfs_renameargs *arg = msg->rpc_argp;
2612 struct nfs_renameres *res = msg->rpc_resp;
2613
2614 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2615 arg->bitmask = server->attr_bitmask;
2616 res->server = server;
2617}
2618
2619static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2620 struct inode *new_dir)
2621{
2622 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2623
2624 if (!nfs4_sequence_done(task, &res->seq_res))
2625 return 0;
2626 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2627 return 0;
2628
2629 update_changeattr(old_dir, &res->old_cinfo);
2630 nfs_post_op_update_inode(old_dir, res->old_fattr);
2631 update_changeattr(new_dir, &res->new_cinfo);
2632 nfs_post_op_update_inode(new_dir, res->new_fattr);
2633 return 1;
2634}
2635
1da177e4
LT		 2636static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2637 struct inode *new_dir, struct qstr *new_name)
2638{
6caf2c82 2639 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2640 struct nfs_renameargs arg = {
1da177e4
LT		 2641 .old_dir = NFS_FH(old_dir),
2642 .new_dir = NFS_FH(new_dir),
2643 .old_name = old_name,
2644 .new_name = new_name,
6caf2c82
TM		 2645 .bitmask = server->attr_bitmask,
2646 };
e8582a8b 2647 struct nfs_renameres res = {
6caf2c82 2648 .server = server,
1da177e4 2649 };
1da177e4
LT		 2650 struct rpc_message msg = {
2651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2652 .rpc_argp = &arg,
2653 .rpc_resp = &res,
2654 };
011fff72 2655 int status = -ENOMEM;
1da177e4 2656
011fff72
TM		 2657 res.old_fattr = nfs_alloc_fattr();
2658 res.new_fattr = nfs_alloc_fattr();
2659 if (res.old_fattr == NULL || res.new_fattr == NULL)
2660 goto out;
1da177e4 2661
011fff72 2662 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2663 if (!status) {
2664 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2665 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2666 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2667 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2668 }
011fff72
TM		 2669out:
2670 nfs_free_fattr(res.new_fattr);
2671 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2672 return status;
2673}
2674
2675static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2676 struct inode *new_dir, struct qstr *new_name)
2677{
2678 struct nfs4_exception exception = { };
2679 int err;
2680 do {
2681 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2682 _nfs4_proc_rename(old_dir, old_name,
2683 new_dir, new_name),
2684 &exception);
2685 } while (exception.retry);
2686 return err;
2687}
2688
2689static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2690{
91ba2eee 2691 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2692 struct nfs4_link_arg arg = {
2693 .fh = NFS_FH(inode),
2694 .dir_fh = NFS_FH(dir),
2695 .name = name,
91ba2eee
TM		 2696 .bitmask = server->attr_bitmask,
2697 };
91ba2eee
TM		 2698 struct nfs4_link_res res = {
2699 .server = server,
1da177e4 2700 };
1da177e4
LT		 2701 struct rpc_message msg = {
2702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2703 .rpc_argp = &arg,
91ba2eee 2704 .rpc_resp = &res,
1da177e4 2705 };
136f2627
TM		 2706 int status = -ENOMEM;
2707
2708 res.fattr = nfs_alloc_fattr();
2709 res.dir_attr = nfs_alloc_fattr();
2710 if (res.fattr == NULL || res.dir_attr == NULL)
2711 goto out;
1da177e4 2712
cccef3b9 2713 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2714 if (!status) {
2715 update_changeattr(dir, &res.cinfo);
2716 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2717 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2718 }
136f2627
TM		 2719out:
2720 nfs_free_fattr(res.dir_attr);
2721 nfs_free_fattr(res.fattr);
1da177e4
LT		 2722 return status;
2723}
2724
2725static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2726{
2727 struct nfs4_exception exception = { };
2728 int err;
2729 do {
2730 err = nfs4_handle_exception(NFS_SERVER(inode),
2731 _nfs4_proc_link(inode, dir, name),
2732 &exception);
2733 } while (exception.retry);
2734 return err;
2735}
2736
57dc9a57
TM		 2737struct nfs4_createdata {
2738 struct rpc_message msg;
2739 struct nfs4_create_arg arg;
2740 struct nfs4_create_res res;
2741 struct nfs_fh fh;
2742 struct nfs_fattr fattr;
2743 struct nfs_fattr dir_fattr;
2744};
2745
2746static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2747 struct qstr *name, struct iattr *sattr, u32 ftype)
2748{
2749 struct nfs4_createdata *data;
2750
2751 data = kzalloc(sizeof(*data), GFP_KERNEL);
2752 if (data != NULL) {
2753 struct nfs_server *server = NFS_SERVER(dir);
2754
2755 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2756 data->msg.rpc_argp = &data->arg;
2757 data->msg.rpc_resp = &data->res;
2758 data->arg.dir_fh = NFS_FH(dir);
2759 data->arg.server = server;
2760 data->arg.name = name;
2761 data->arg.attrs = sattr;
2762 data->arg.ftype = ftype;
2763 data->arg.bitmask = server->attr_bitmask;
2764 data->res.server = server;
2765 data->res.fh = &data->fh;
2766 data->res.fattr = &data->fattr;
2767 data->res.dir_fattr = &data->dir_fattr;
2768 nfs_fattr_init(data->res.fattr);
2769 nfs_fattr_init(data->res.dir_fattr);
2770 }
2771 return data;
2772}
2773
2774static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2775{
cccef3b9
AA		 2776 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2777 &data->arg, &data->res, 1);
57dc9a57
TM		 2778 if (status == 0) {
2779 update_changeattr(dir, &data->res.dir_cinfo);
2780 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2781 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2782 }
2783 return status;
2784}
2785
2786static void nfs4_free_createdata(struct nfs4_createdata *data)
2787{
2788 kfree(data);
2789}
2790
4f390c15 2791static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2792 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2793{
57dc9a57
TM		 2794 struct nfs4_createdata *data;
2795 int status = -ENAMETOOLONG;
1da177e4 2796
94a6d753 2797 if (len > NFS4_MAXPATHLEN)
57dc9a57 2798 goto out;
4f390c15 2799
57dc9a57
TM		 2800 status = -ENOMEM;
2801 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2802 if (data == NULL)
2803 goto out;
2804
2805 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2806 data->arg.u.symlink.pages = &page;
2807 data->arg.u.symlink.len = len;
1da177e4 2808
57dc9a57
TM		 2809 status = nfs4_do_create(dir, dentry, data);
2810
2811 nfs4_free_createdata(data);
2812out:
1da177e4
LT		 2813 return status;
2814}
2815
4f390c15 2816static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2817 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2818{
2819 struct nfs4_exception exception = { };
2820 int err;
2821 do {
2822 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2823 _nfs4_proc_symlink(dir, dentry, page,
2824 len, sattr),
1da177e4
LT		 2825 &exception);
2826 } while (exception.retry);
2827 return err;
2828}
2829
2830static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2831 struct iattr *sattr)
2832{
57dc9a57
TM		 2833 struct nfs4_createdata *data;
2834 int status = -ENOMEM;
1da177e4 2835
57dc9a57
TM		 2836 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2837 if (data == NULL)
2838 goto out;
2839
2840 status = nfs4_do_create(dir, dentry, data);
2841
2842 nfs4_free_createdata(data);
2843out:
1da177e4
LT		 2844 return status;
2845}
2846
2847static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2848 struct iattr *sattr)
2849{
2850 struct nfs4_exception exception = { };
2851 int err;
a8a5da99
AK		 2852
2853 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2854 do {
2855 err = nfs4_handle_exception(NFS_SERVER(dir),
2856 _nfs4_proc_mkdir(dir, dentry, sattr),
2857 &exception);
2858 } while (exception.retry);
2859 return err;
2860}
2861
2862static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2863 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2864{
2865 struct inode *dir = dentry->d_inode;
2866 struct nfs4_readdir_arg args = {
2867 .fh = NFS_FH(dir),
56e4ebf8 2868 .pages = pages,
1da177e4
LT		 2869 .pgbase = 0,
2870 .count = count,
96d25e53 2871 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2872 .plus = plus,
1da177e4
LT		 2873 };
2874 struct nfs4_readdir_res res;
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2877 .rpc_argp = &args,
2878 .rpc_resp = &res,
2879 .rpc_cred = cred,
2880 };
2881 int status;
2882
3110ff80 2883 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2884 dentry->d_parent->d_name.name,
2885 dentry->d_name.name,
2886 (unsigned long long)cookie);
1da177e4
LT		 2887 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2888 res.pgbase = args.pgbase;
cccef3b9 2889 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
ac396128 2890 if (status >= 0) {
1da177e4 2891 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2892 status += args.pgbase;
2893 }
c4812998
TM		 2894
2895 nfs_invalidate_atime(dir);
2896
3110ff80 2897 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2898 return status;
2899}
2900
2901static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2902 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2903{
2904 struct nfs4_exception exception = { };
2905 int err;
2906 do {
2907 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2908 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2909 pages, count, plus),
1da177e4
LT		 2910 &exception);
2911 } while (exception.retry);
2912 return err;
2913}
2914
2915static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2916 struct iattr *sattr, dev_t rdev)
2917{
57dc9a57
TM		 2918 struct nfs4_createdata *data;
2919 int mode = sattr->ia_mode;
2920 int status = -ENOMEM;
1da177e4
LT		 2921
2922 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2923 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2924
2925 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2926 if (data == NULL)
2927 goto out;
2928
1da177e4 2929 if (S_ISFIFO(mode))
57dc9a57 2930 data->arg.ftype = NF4FIFO;
1da177e4 2931 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2932 data->arg.ftype = NF4BLK;
2933 data->arg.u.device.specdata1 = MAJOR(rdev);
2934 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2935 }
2936 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2937 data->arg.ftype = NF4CHR;
2938 data->arg.u.device.specdata1 = MAJOR(rdev);
2939 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2940 }
1da177e4 2941
57dc9a57
TM		 2942 status = nfs4_do_create(dir, dentry, data);
2943
2944 nfs4_free_createdata(data);
2945out:
1da177e4
LT		 2946 return status;
2947}
2948
2949static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr, dev_t rdev)
2951{
2952 struct nfs4_exception exception = { };
2953 int err;
a8a5da99
AK		 2954
2955 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2956 do {
2957 err = nfs4_handle_exception(NFS_SERVER(dir),
2958 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
2964static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2965 struct nfs_fsstat *fsstat)
2966{
2967 struct nfs4_statfs_arg args = {
2968 .fh = fhandle,
2969 .bitmask = server->attr_bitmask,
2970 };
24ad148a
BH		 2971 struct nfs4_statfs_res res = {
2972 .fsstat = fsstat,
2973 };
1da177e4
LT		 2974 struct rpc_message msg = {
2975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2976 .rpc_argp = &args,
24ad148a 2977 .rpc_resp = &res,
1da177e4
LT		 2978 };
2979
0e574af1 2980 nfs_fattr_init(fsstat->fattr);
cccef3b9 2981 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2982}
2983
2984static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2985{
2986 struct nfs4_exception exception = { };
2987 int err;
2988 do {
2989 err = nfs4_handle_exception(server,
2990 _nfs4_proc_statfs(server, fhandle, fsstat),
2991 &exception);
2992 } while (exception.retry);
2993 return err;
2994}
2995
2996static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2997 struct nfs_fsinfo *fsinfo)
2998{
2999 struct nfs4_fsinfo_arg args = {
3000 .fh = fhandle,
3001 .bitmask = server->attr_bitmask,
3002 };
3dda5e43
BH		 3003 struct nfs4_fsinfo_res res = {
3004 .fsinfo = fsinfo,
3005 };
1da177e4
LT		 3006 struct rpc_message msg = {
3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3008 .rpc_argp = &args,
3dda5e43 3009 .rpc_resp = &res,
1da177e4
LT		 3010 };
3011
cccef3b9 3012 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3013}
3014
3015static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019
3020 do {
3021 err = nfs4_handle_exception(server,
3022 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3023 &exception);
3024 } while (exception.retry);
3025 return err;
3026}
3027
3028static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3029{
0e574af1 3030 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3031 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3032}
3033
3034static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3035 struct nfs_pathconf *pathconf)
3036{
3037 struct nfs4_pathconf_arg args = {
3038 .fh = fhandle,
3039 .bitmask = server->attr_bitmask,
3040 };
d45b2989
BH		 3041 struct nfs4_pathconf_res res = {
3042 .pathconf = pathconf,
3043 };
1da177e4
LT		 3044 struct rpc_message msg = {
3045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3046 .rpc_argp = &args,
d45b2989 3047 .rpc_resp = &res,
1da177e4
LT		 3048 };
3049
3050 /* None of the pathconf attributes are mandatory to implement */
3051 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3052 memset(pathconf, 0, sizeof(*pathconf));
3053 return 0;
3054 }
3055
0e574af1 3056 nfs_fattr_init(pathconf->fattr);
cccef3b9 3057 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3058}
3059
3060static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3061 struct nfs_pathconf *pathconf)
3062{
3063 struct nfs4_exception exception = { };
3064 int err;
3065
3066 do {
3067 err = nfs4_handle_exception(server,
3068 _nfs4_proc_pathconf(server, fhandle, pathconf),
3069 &exception);
3070 } while (exception.retry);
3071 return err;
3072}
3073
ec06c096 3074static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3075{
ec06c096 3076 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3077
f11c88af
AA		 3078 dprintk("--> %s\n", __func__);
3079
14516c3a
TM		 3080 if (!nfs4_sequence_done(task, &data->res.seq_res))
3081 return -EAGAIN;
f11c88af 3082
9e33bed5 3083 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3084 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3085 return -EAGAIN;
1da177e4 3086 }
8850df99
TM		 3087
3088 nfs_invalidate_atime(data->inode);
1da177e4 3089 if (task->tk_status > 0)
ec06c096
TM		 3090 renew_lease(server, data->timestamp);
3091 return 0;
1da177e4
LT		 3092}
3093
bdc7f021 3094static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3095{
1da177e4 3096 data->timestamp = jiffies;
bdc7f021 3097 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3098}
3099
788e7a89 3100static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3101{
1da177e4
LT		 3102 struct inode *inode = data->inode;
3103
14516c3a
TM		 3104 if (!nfs4_sequence_done(task, &data->res.seq_res))
3105 return -EAGAIN;
def6ed7e 3106
9e33bed5 3107 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3108 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3109 return -EAGAIN;
1da177e4 3110 }
4f9838c7 3111 if (task->tk_status >= 0) {
1da177e4 3112 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3113 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3114 }
788e7a89 3115 return 0;
1da177e4
LT		 3116}
3117
bdc7f021 3118static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3119{
bdc7f021
TM		 3120 struct nfs_server *server = NFS_SERVER(data->inode);
3121
a65318bf 3122 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3123 data->res.server = server;
1da177e4
LT		 3124 data->timestamp = jiffies;
3125
bdc7f021 3126 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3127}
3128
788e7a89 3129static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3130{
1da177e4
LT		 3131 struct inode *inode = data->inode;
3132
14516c3a
TM		 3133 if (!nfs4_sequence_done(task, &data->res.seq_res))
3134 return -EAGAIN;
3135
9e33bed5 3136 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3137 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3138 return -EAGAIN;
1da177e4 3139 }
9e08a3c5 3140 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3141 return 0;
1da177e4
LT		 3142}
3143
bdc7f021 3144static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3145{
788e7a89 3146 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3147
a65318bf 3148 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3149 data->res.server = server;
bdc7f021 3150 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3151}
3152
9bc4e3ca
CL		 3153struct nfs4_renewdata {
3154 struct nfs_client *client;
3155 unsigned long timestamp;
3156};
3157
1da177e4
LT		 3158/*
3159 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3160 * standalone procedure for queueing an asynchronous RENEW.
3161 */
9bc4e3ca 3162static void nfs4_renew_release(void *calldata)
dc96aef9 3163{
9bc4e3ca
CL		 3164 struct nfs4_renewdata *data = calldata;
3165 struct nfs_client *clp = data->client;
dc96aef9 3166
0851de06
AB		 3167 if (atomic_read(&clp->cl_count) > 1)
3168 nfs4_schedule_state_renewal(clp);
3169 nfs_put_client(clp);
9bc4e3ca 3170 kfree(data);
dc96aef9
AB		 3171}
3172
9bc4e3ca 3173static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3174{
9bc4e3ca
CL		 3175 struct nfs4_renewdata *data = calldata;
3176 struct nfs_client *clp = data->client;
3177 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3178
3179 if (task->tk_status < 0) {
95baa25c
TM		 3180 /* Unless we're shutting down, schedule state recovery! */
3181 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3182 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3183 return;
3184 }
452e9352 3185 do_renew_lease(clp, timestamp);
1da177e4
LT		 3186}
3187
963d8fe5
TM		 3188static const struct rpc_call_ops nfs4_renew_ops = {
3189 .rpc_call_done = nfs4_renew_done,
dc96aef9 3190 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3191};
3192
adfa6f98 3193int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3194{
3195 struct rpc_message msg = {
3196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3197 .rpc_argp = clp,
b4454fe1 3198 .rpc_cred = cred,
1da177e4 3199 };
9bc4e3ca 3200 struct nfs4_renewdata *data;
1da177e4 3201
0851de06
AB		 3202 if (!atomic_inc_not_zero(&clp->cl_count))
3203 return -EIO;
9bc4e3ca
CL		 3204 data = kmalloc(sizeof(*data), GFP_KERNEL);
3205 if (data == NULL)
3206 return -ENOMEM;
3207 data->client = clp;
3208 data->timestamp = jiffies;
1da177e4 3209 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3210 &nfs4_renew_ops, data);
1da177e4
LT		 3211}
3212
adfa6f98 3213int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3214{
3215 struct rpc_message msg = {
3216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3217 .rpc_argp = clp,
b4454fe1 3218 .rpc_cred = cred,
1da177e4
LT		 3219 };
3220 unsigned long now = jiffies;
3221 int status;
3222
3223 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3224 if (status < 0)
3225 return status;
452e9352 3226 do_renew_lease(clp, now);
1da177e4
LT		 3227 return 0;
3228}
3229
aa1870af
BF		 3230static inline int nfs4_server_supports_acls(struct nfs_server *server)
3231{
3232 return (server->caps & NFS_CAP_ACLS)
3233 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3234 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3235}
3236
3237/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3238 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3239 * the stack.
3240 */
3241#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3242
3243static void buf_to_pages(const void *buf, size_t buflen,
3244 struct page **pages, unsigned int *pgbase)
3245{
3246 const void *p = buf;
3247
3248 *pgbase = offset_in_page(buf);
3249 p -= *pgbase;
3250 while (p < buf + buflen) {
3251 *(pages++) = virt_to_page(p);
3252 p += PAGE_CACHE_SIZE;
3253 }
3254}
3255
e9e3d724
NH		 3256static int buf_to_pages_noslab(const void *buf, size_t buflen,
3257 struct page **pages, unsigned int *pgbase)
3258{
3259 struct page *newpage, **spages;
3260 int rc = 0;
3261 size_t len;
3262 spages = pages;
3263
3264 do {
3265 len = min(PAGE_CACHE_SIZE, buflen);
3266 newpage = alloc_page(GFP_KERNEL);
3267
3268 if (newpage == NULL)
3269 goto unwind;
3270 memcpy(page_address(newpage), buf, len);
3271 buf += len;
3272 buflen -= len;
3273 *pages++ = newpage;
3274 rc++;
3275 } while (buflen != 0);
3276
3277 return rc;
3278
3279unwind:
3280 for(; rc > 0; rc--)
3281 __free_page(spages[rc-1]);
3282 return -ENOMEM;
3283}
3284
e50a1c2e
BF		 3285struct nfs4_cached_acl {
3286 int cached;
3287 size_t len;
3e9d4154 3288 char data[0];
e50a1c2e
BF		 3289};
3290
3291static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3292{
3293 struct nfs_inode *nfsi = NFS_I(inode);
3294
3295 spin_lock(&inode->i_lock);
3296 kfree(nfsi->nfs4_acl);
3297 nfsi->nfs4_acl = acl;
3298 spin_unlock(&inode->i_lock);
3299}
3300
3301static void nfs4_zap_acl_attr(struct inode *inode)
3302{
3303 nfs4_set_cached_acl(inode, NULL);
3304}
3305
3306static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3307{
3308 struct nfs_inode *nfsi = NFS_I(inode);
3309 struct nfs4_cached_acl *acl;
3310 int ret = -ENOENT;
3311
3312 spin_lock(&inode->i_lock);
3313 acl = nfsi->nfs4_acl;
3314 if (acl == NULL)
3315 goto out;
3316 if (buf == NULL) /* user is just asking for length */
3317 goto out_len;
3318 if (acl->cached == 0)
3319 goto out;
3320 ret = -ERANGE; /* see getxattr(2) man page */
3321 if (acl->len > buflen)
3322 goto out;
3323 memcpy(buf, acl->data, acl->len);
3324out_len:
3325 ret = acl->len;
3326out:
3327 spin_unlock(&inode->i_lock);
3328 return ret;
3329}
3330
3331static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3332{
3333 struct nfs4_cached_acl *acl;
3334
3335 if (buf && acl_len <= PAGE_SIZE) {
3336 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3337 if (acl == NULL)
3338 goto out;
3339 acl->cached = 1;
3340 memcpy(acl->data, buf, acl_len);
3341 } else {
3342 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3343 if (acl == NULL)
3344 goto out;
3345 acl->cached = 0;
3346 }
3347 acl->len = acl_len;
3348out:
3349 nfs4_set_cached_acl(inode, acl);
3350}
3351
16b4289c 3352static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3353{
aa1870af
BF		 3354 struct page *pages[NFS4ACL_MAXPAGES];
3355 struct nfs_getaclargs args = {
3356 .fh = NFS_FH(inode),
3357 .acl_pages = pages,
3358 .acl_len = buflen,
3359 };
663c79b3
BH		 3360 struct nfs_getaclres res = {
3361 .acl_len = buflen,
3362 };
e50a1c2e 3363 void *resp_buf;
aa1870af
BF		 3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3366 .rpc_argp = &args,
663c79b3 3367 .rpc_resp = &res,
aa1870af 3368 };
e50a1c2e 3369 struct page *localpage = NULL;
aa1870af
BF		 3370 int ret;
3371
e50a1c2e
BF		 3372 if (buflen < PAGE_SIZE) {
3373 /* As long as we're doing a round trip to the server anyway,
3374 * let's be prepared for a page of acl data. */
3375 localpage = alloc_page(GFP_KERNEL);
3376 resp_buf = page_address(localpage);
3377 if (localpage == NULL)
3378 return -ENOMEM;
3379 args.acl_pages[0] = localpage;
3380 args.acl_pgbase = 0;
663c79b3 3381 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3382 } else {
3383 resp_buf = buf;
3384 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3385 }
cccef3b9 3386 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3387 if (ret)
3388 goto out_free;
663c79b3
BH		 3389 if (res.acl_len > args.acl_len)
3390 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3391 else
663c79b3 3392 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3393 if (buf) {
3394 ret = -ERANGE;
663c79b3 3395 if (res.acl_len > buflen)
e50a1c2e
BF		 3396 goto out_free;
3397 if (localpage)
663c79b3 3398 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3399 }
663c79b3 3400 ret = res.acl_len;
e50a1c2e
BF		 3401out_free:
3402 if (localpage)
3403 __free_page(localpage);
aa1870af
BF		 3404 return ret;
3405}
3406
16b4289c
TM		 3407static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3408{
3409 struct nfs4_exception exception = { };
3410 ssize_t ret;
3411 do {
3412 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3413 if (ret >= 0)
3414 break;
3415 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3416 } while (exception.retry);
3417 return ret;
3418}
3419
e50a1c2e
BF		 3420static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3421{
3422 struct nfs_server *server = NFS_SERVER(inode);
3423 int ret;
3424
3425 if (!nfs4_server_supports_acls(server))
3426 return -EOPNOTSUPP;
3427 ret = nfs_revalidate_inode(server, inode);
3428 if (ret < 0)
3429 return ret;
08a22b39
AK		 3430 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3431 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3432 ret = nfs4_read_cached_acl(inode, buf, buflen);
3433 if (ret != -ENOENT)
3434 return ret;
3435 return nfs4_get_acl_uncached(inode, buf, buflen);
3436}
3437
16b4289c 3438static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3439{
3440 struct nfs_server *server = NFS_SERVER(inode);
3441 struct page *pages[NFS4ACL_MAXPAGES];
3442 struct nfs_setaclargs arg = {
3443 .fh = NFS_FH(inode),
3444 .acl_pages = pages,
3445 .acl_len = buflen,
3446 };
73c403a9 3447 struct nfs_setaclres res;
4b580ee3
BF		 3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3450 .rpc_argp = &arg,
73c403a9 3451 .rpc_resp = &res,
4b580ee3 3452 };
e9e3d724 3453 int ret, i;
4b580ee3
BF		 3454
3455 if (!nfs4_server_supports_acls(server))
3456 return -EOPNOTSUPP;
e9e3d724
NH		 3457 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3458 if (i < 0)
3459 return i;
642ac549 3460 nfs_inode_return_delegation(inode);
cccef3b9 3461 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
e9e3d724
NH		 3462
3463 /*
3464 * Free each page after tx, so the only ref left is
3465 * held by the network stack
3466 */
3467 for (; i > 0; i--)
3468 put_page(pages[i-1]);
3469
08a22b39
AK		 3470 /*
3471 * Acl update can result in inode attribute update.
3472 * so mark the attribute cache invalid.
3473 */
3474 spin_lock(&inode->i_lock);
3475 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3476 spin_unlock(&inode->i_lock);
f41f7418
TM		 3477 nfs_access_zap_cache(inode);
3478 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3479 return ret;
3480}
3481
16b4289c
TM		 3482static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3483{
3484 struct nfs4_exception exception = { };
3485 int err;
3486 do {
3487 err = nfs4_handle_exception(NFS_SERVER(inode),
3488 __nfs4_proc_set_acl(inode, buf, buflen),
3489 &exception);
3490 } while (exception.retry);
3491 return err;
3492}
3493
1da177e4 3494static int
aa5190d0 3495nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3496{
aa5190d0
TM		 3497 struct nfs_client *clp = server->nfs_client;
3498
3499 if (task->tk_status >= 0)
1da177e4
LT		 3500 return 0;
3501 switch(task->tk_status) {
9e33bed5
TM		 3502 case -NFS4ERR_ADMIN_REVOKED:
3503 case -NFS4ERR_BAD_STATEID:
3504 case -NFS4ERR_OPENMODE:
3505 if (state == NULL)
3506 break;
3507 nfs4_state_mark_reclaim_nograce(clp, state);
a2c0b9e2 3508 goto do_state_recovery;
1da177e4 3509 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3510 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3511 case -NFS4ERR_EXPIRED:
a2c0b9e2 3512 goto do_state_recovery;
4745e315
AA		 3513#if defined(CONFIG_NFS_V4_1)
3514 case -NFS4ERR_BADSESSION:
3515 case -NFS4ERR_BADSLOT:
3516 case -NFS4ERR_BAD_HIGH_SLOT:
3517 case -NFS4ERR_DEADSESSION:
3518 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3519 case -NFS4ERR_SEQ_FALSE_RETRY:
3520 case -NFS4ERR_SEQ_MISORDERED:
3521 dprintk("%s ERROR %d, Reset session\n", __func__,
3522 task->tk_status);
0b9e2d41 3523 nfs4_schedule_state_recovery(clp);
4745e315
AA		 3524 task->tk_status = 0;
3525 return -EAGAIN;
3526#endif /* CONFIG_NFS_V4_1 */
1da177e4 3527 case -NFS4ERR_DELAY:
aa5190d0 3528 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3529 case -NFS4ERR_GRACE:
2c643488 3530 case -EKEYEXPIRED:
1da177e4
LT		 3531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3532 task->tk_status = 0;
3533 return -EAGAIN;
3534 case -NFS4ERR_OLD_STATEID:
3535 task->tk_status = 0;
3536 return -EAGAIN;
3537 }
3538 task->tk_status = nfs4_map_errors(task->tk_status);
3539 return 0;
a2c0b9e2
TM		 3540do_state_recovery:
3541 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3542 nfs4_schedule_state_recovery(clp);
3543 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3544 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3545 task->tk_status = 0;
3546 return -EAGAIN;
1da177e4
LT		 3547}
3548
bb8b27e5
TM		 3549int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3550 unsigned short port, struct rpc_cred *cred,
3551 struct nfs4_setclientid_res *res)
1da177e4
LT		 3552{
3553 nfs4_verifier sc_verifier;
3554 struct nfs4_setclientid setclientid = {
3555 .sc_verifier = &sc_verifier,
3556 .sc_prog = program,
f4eecd5d 3557 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3558 };
3559 struct rpc_message msg = {
3560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3561 .rpc_argp = &setclientid,
bb8b27e5 3562 .rpc_resp = res,
286d7d6a 3563 .rpc_cred = cred,
1da177e4 3564 };
bc4785cd 3565 __be32 *p;
1da177e4
LT		 3566 int loop = 0;
3567 int status;
3568
bc4785cd 3569 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3570 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3571 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3572
3573 for(;;) {
3574 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3575 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3576 clp->cl_ipaddr,
3577 rpc_peeraddr2str(clp->cl_rpcclient,
3578 RPC_DISPLAY_ADDR),
69dd716c
TM		 3579 rpc_peeraddr2str(clp->cl_rpcclient,
3580 RPC_DISPLAY_PROTO),
78ea323b 3581 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3582 clp->cl_id_uniquifier);
3583 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3584 sizeof(setclientid.sc_netid),
3585 rpc_peeraddr2str(clp->cl_rpcclient,
3586 RPC_DISPLAY_NETID));
1da177e4 3587 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3588 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3589 clp->cl_ipaddr, port >> 8, port & 255);
3590
3591 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3592 if (status != -NFS4ERR_CLID_INUSE)
3593 break;
3594 if (signalled())
3595 break;
3596 if (loop++ & 1)
611c96c8 3597 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3598 else
3599 if (++clp->cl_id_uniquifier == 0)
3600 break;
3601 }
3602 return status;
3603}
3604
bb8b27e5
TM		 3605static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3606 struct nfs4_setclientid_res *arg,
3607 struct rpc_cred *cred)
1da177e4
LT		 3608{
3609 struct nfs_fsinfo fsinfo;
3610 struct rpc_message msg = {
3611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3612 .rpc_argp = arg,
1da177e4 3613 .rpc_resp = &fsinfo,
286d7d6a 3614 .rpc_cred = cred,
1da177e4
LT		 3615 };
3616 unsigned long now;
3617 int status;
3618
3619 now = jiffies;
3620 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3621 if (status == 0) {
3622 spin_lock(&clp->cl_lock);
3623 clp->cl_lease_time = fsinfo.lease_time * HZ;
3624 clp->cl_last_renewal = now;
3625 spin_unlock(&clp->cl_lock);
3626 }
3627 return status;
3628}
3629
bb8b27e5
TM		 3630int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3631 struct nfs4_setclientid_res *arg,
3632 struct rpc_cred *cred)
51581f3b 3633{
77e03677 3634 long timeout = 0;
51581f3b
TM		 3635 int err;
3636 do {
bb8b27e5 3637 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3638 switch (err) {
3639 case 0:
3640 return err;
3641 case -NFS4ERR_RESOURCE:
3642 /* The IBM lawyers misread another document! */
3643 case -NFS4ERR_DELAY:
3644 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3645 }
3646 } while (err == 0);
3647 return err;
3648}
3649
fe650407
TM		 3650struct nfs4_delegreturndata {
3651 struct nfs4_delegreturnargs args;
fa178f29 3652 struct nfs4_delegreturnres res;
fe650407
TM		 3653 struct nfs_fh fh;
3654 nfs4_stateid stateid;
26e976a8 3655 unsigned long timestamp;
fa178f29 3656 struct nfs_fattr fattr;
fe650407
TM		 3657 int rpc_status;
3658};
3659
fe650407
TM		 3660static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3661{
3662 struct nfs4_delegreturndata *data = calldata;
938e1010 3663
14516c3a
TM		 3664 if (!nfs4_sequence_done(task, &data->res.seq_res))
3665 return;
938e1010 3666
79708861
RL		 3667 switch (task->tk_status) {
3668 case -NFS4ERR_STALE_STATEID:
3669 case -NFS4ERR_EXPIRED:
3670 case 0:
fa178f29 3671 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3672 break;
3673 default:
3674 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3675 -EAGAIN) {
3676 nfs_restart_rpc(task, data->res.server->nfs_client);
3677 return;
3678 }
3679 }
3680 data->rpc_status = task->tk_status;
fe650407
TM		 3681}
3682
3683static void nfs4_delegreturn_release(void *calldata)
3684{
fe650407
TM		 3685 kfree(calldata);
3686}
3687
938e1010
AA		 3688#if defined(CONFIG_NFS_V4_1)
3689static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3690{
3691 struct nfs4_delegreturndata *d_data;
3692
3693 d_data = (struct nfs4_delegreturndata *)data;
3694
035168ab 3695 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3696 &d_data->args.seq_args,
3697 &d_data->res.seq_res, 1, task))
3698 return;
3699 rpc_call_start(task);
3700}
3701#endif /* CONFIG_NFS_V4_1 */
3702
c8d149f3 3703static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3704#if defined(CONFIG_NFS_V4_1)
3705 .rpc_call_prepare = nfs4_delegreturn_prepare,
3706#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3707 .rpc_call_done = nfs4_delegreturn_done,
3708 .rpc_release = nfs4_delegreturn_release,
3709};
3710
e6f81075 3711static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3712{
3713 struct nfs4_delegreturndata *data;
fa178f29 3714 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3715 struct rpc_task *task;
5138fde0
TM		 3716 struct rpc_message msg = {
3717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3718 .rpc_cred = cred,
3719 };
c970aa85
TM		 3720 struct rpc_task_setup task_setup_data = {
3721 .rpc_client = server->client,
5138fde0 3722 .rpc_message = &msg,
c970aa85
TM		 3723 .callback_ops = &nfs4_delegreturn_ops,
3724 .flags = RPC_TASK_ASYNC,
3725 };
e6f81075 3726 int status = 0;
fe650407 3727
8535b2be 3728 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3729 if (data == NULL)
3730 return -ENOMEM;
3731 data->args.fhandle = &data->fh;
3732 data->args.stateid = &data->stateid;
fa178f29 3733 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3734 nfs_copy_fh(&data->fh, NFS_FH(inode));
3735 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3736 data->res.fattr = &data->fattr;
3737 data->res.server = server;
5138fde0 3738 nfs_fattr_init(data->res.fattr);
26e976a8 3739 data->timestamp = jiffies;
fe650407
TM		 3740 data->rpc_status = 0;
3741
c970aa85 3742 task_setup_data.callback_data = data;
1174dd1f
TM		 3743 msg.rpc_argp = &data->args;
3744 msg.rpc_resp = &data->res;
c970aa85 3745 task = rpc_run_task(&task_setup_data);
7a1218a2 3746 if (IS_ERR(task))
fe650407 3747 return PTR_ERR(task);
e6f81075
TM		 3748 if (!issync)
3749 goto out;
fe650407 3750 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3751 if (status != 0)
3752 goto out;
3753 status = data->rpc_status;
3754 if (status != 0)
3755 goto out;
3756 nfs_refresh_inode(inode, &data->fattr);
3757out:
e6b3c4db 3758 rpc_put_task(task);
fe650407 3759 return status;
1da177e4
LT		 3760}
3761
e6f81075 3762int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3763{
3764 struct nfs_server *server = NFS_SERVER(inode);
3765 struct nfs4_exception exception = { };
3766 int err;
3767 do {
e6f81075 3768 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3769 switch (err) {
3770 case -NFS4ERR_STALE_STATEID:
3771 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3772 case 0:
3773 return 0;
3774 }
3775 err = nfs4_handle_exception(server, err, &exception);
3776 } while (exception.retry);
3777 return err;
3778}
3779
3780#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3781#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3782
3783/*
3784 * sleep, with exponential backoff, and retry the LOCK operation.
3785 */
3786static unsigned long
3787nfs4_set_lock_task_retry(unsigned long timeout)
3788{
150030b7 3789 schedule_timeout_killable(timeout);
1da177e4
LT		 3790 timeout <<= 1;
3791 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3792 return NFS4_LOCK_MAXTIMEOUT;
3793 return timeout;
3794}
3795
1da177e4
LT		 3796static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3797{
3798 struct inode *inode = state->inode;
3799 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3800 struct nfs_client *clp = server->nfs_client;
911d1aaf 3801 struct nfs_lockt_args arg = {
1da177e4 3802 .fh = NFS_FH(inode),
911d1aaf 3803 .fl = request,
1da177e4 3804 };
911d1aaf
TM		 3805 struct nfs_lockt_res res = {
3806 .denied = request,
1da177e4
LT		 3807 };
3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3810 .rpc_argp = &arg,
3811 .rpc_resp = &res,
3812 .rpc_cred = state->owner->so_cred,
3813 };
1da177e4
LT		 3814 struct nfs4_lock_state *lsp;
3815 int status;
3816
911d1aaf 3817 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3818 status = nfs4_set_lock_state(state, request);
3819 if (status != 0)
3820 goto out;
3821 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3822 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3823 arg.lock_owner.s_dev = server->s_dev;
cccef3b9 3824 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3825 switch (status) {
3826 case 0:
3827 request->fl_type = F_UNLCK;
3828 break;
3829 case -NFS4ERR_DENIED:
3830 status = 0;
1da177e4 3831 }
70cc6487 3832 request->fl_ops->fl_release_private(request);
8d0a8a9d 3833out:
1da177e4
LT		 3834 return status;
3835}
3836
3837static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3838{
3839 struct nfs4_exception exception = { };
3840 int err;
3841
3842 do {
3843 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3844 _nfs4_proc_getlk(state, cmd, request),
3845 &exception);
3846 } while (exception.retry);
3847 return err;
3848}
3849
3850static int do_vfs_lock(struct file *file, struct file_lock *fl)
3851{
3852 int res = 0;
3853 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3854 case FL_POSIX:
3855 res = posix_lock_file_wait(file, fl);
3856 break;
3857 case FL_FLOCK:
3858 res = flock_lock_file_wait(file, fl);
3859 break;
3860 default:
3861 BUG();
3862 }
1da177e4
LT		 3863 return res;
3864}
3865
faf5f49c 3866struct nfs4_unlockdata {
911d1aaf
TM		 3867 struct nfs_locku_args arg;
3868 struct nfs_locku_res res;
faf5f49c
TM		 3869 struct nfs4_lock_state *lsp;
3870 struct nfs_open_context *ctx;
911d1aaf
TM		 3871 struct file_lock fl;
3872 const struct nfs_server *server;
26e976a8 3873 unsigned long timestamp;
faf5f49c
TM		 3874};
3875
911d1aaf
TM		 3876static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3877 struct nfs_open_context *ctx,
3878 struct nfs4_lock_state *lsp,
3879 struct nfs_seqid *seqid)
3880{
3881 struct nfs4_unlockdata *p;
3882 struct inode *inode = lsp->ls_state->inode;
3883
8535b2be 3884 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3885 if (p == NULL)
3886 return NULL;
3887 p->arg.fh = NFS_FH(inode);
3888 p->arg.fl = &p->fl;
3889 p->arg.seqid = seqid;
c1d51931 3890 p->res.seqid = seqid;
911d1aaf
TM		 3891 p->arg.stateid = &lsp->ls_stateid;
3892 p->lsp = lsp;
3893 atomic_inc(&lsp->ls_count);
3894 /* Ensure we don't close file until we're done freeing locks! */
3895 p->ctx = get_nfs_open_context(ctx);
3896 memcpy(&p->fl, fl, sizeof(p->fl));
3897 p->server = NFS_SERVER(inode);
3898 return p;
3899}
3900
06f814a3 3901static void nfs4_locku_release_calldata(void *data)
faf5f49c 3902{
963d8fe5 3903 struct nfs4_unlockdata *calldata = data;
911d1aaf 3904 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3905 nfs4_put_lock_state(calldata->lsp);
3906 put_nfs_open_context(calldata->ctx);
3907 kfree(calldata);
faf5f49c
TM		 3908}
3909
963d8fe5 3910static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3911{
963d8fe5 3912 struct nfs4_unlockdata *calldata = data;
faf5f49c 3913
14516c3a
TM		 3914 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3915 return;
faf5f49c
TM		 3916 switch (task->tk_status) {
3917 case 0:
3918 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3919 calldata->res.stateid.data,
faf5f49c 3920 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3921 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3922 break;
9e33bed5
TM		 3923 case -NFS4ERR_BAD_STATEID:
3924 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3925 case -NFS4ERR_STALE_STATEID:
3926 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3927 break;
3928 default:
9e33bed5 3929 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3930 nfs_restart_rpc(task,
d61e612a 3931 calldata->server->nfs_client);
faf5f49c 3932 }
faf5f49c
TM		 3933}
3934
4ce70ada 3935static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3936{
4ce70ada 3937 struct nfs4_unlockdata *calldata = data;
faf5f49c 3938
911d1aaf 3939 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3940 return;
3941 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3942 /* Note: exit _without_ running nfs4_locku_done */
3943 task->tk_action = NULL;
faf5f49c
TM		 3944 return;
3945 }
26e976a8 3946 calldata->timestamp = jiffies;
035168ab 3947 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3948 &calldata->arg.seq_args,
3949 &calldata->res.seq_res, 1, task))
3950 return;
5138fde0 3951 rpc_call_start(task);
faf5f49c
TM		 3952}
3953
963d8fe5 3954static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3955 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3956 .rpc_call_done = nfs4_locku_done,
06f814a3 3957 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3958};
3959
a5d16a4d
TM		 3960static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3961 struct nfs_open_context *ctx,
3962 struct nfs4_lock_state *lsp,
3963 struct nfs_seqid *seqid)
3964{
3965 struct nfs4_unlockdata *data;
5138fde0
TM		 3966 struct rpc_message msg = {
3967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3968 .rpc_cred = ctx->cred,
3969 };
c970aa85
TM		 3970 struct rpc_task_setup task_setup_data = {
3971 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3972 .rpc_message = &msg,
c970aa85 3973 .callback_ops = &nfs4_locku_ops,
101070ca 3974 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3975 .flags = RPC_TASK_ASYNC,
3976 };
a5d16a4d 3977
137d6aca
FF		 3978 /* Ensure this is an unlock - when canceling a lock, the
3979 * canceled lock is passed in, and it won't be an unlock.
3980 */
3981 fl->fl_type = F_UNLCK;
3982
a5d16a4d
TM		 3983 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3984 if (data == NULL) {
3985 nfs_free_seqid(seqid);
3986 return ERR_PTR(-ENOMEM);
3987 }
3988
1174dd1f
TM		 3989 msg.rpc_argp = &data->arg;
3990 msg.rpc_resp = &data->res;
c970aa85
TM		 3991 task_setup_data.callback_data = data;
3992 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3993}
3994
faf5f49c
TM		 3995static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3996{
19e03c57 3997 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3998 struct nfs_seqid *seqid;
1da177e4 3999 struct nfs4_lock_state *lsp;
06f814a3
TM		 4000 struct rpc_task *task;
4001 int status = 0;
536ff0f8 4002 unsigned char fl_flags = request->fl_flags;
faf5f49c 4003
8d0a8a9d 4004 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4005 /* Unlock _before_ we do the RPC call */
4006 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4007 down_read(&nfsi->rwsem);
4008 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4009 up_read(&nfsi->rwsem);
9b073574 4010 goto out;
19e03c57
TM		 4011 }
4012 up_read(&nfsi->rwsem);
8d0a8a9d 4013 if (status != 0)
9b073574
TM		 4014 goto out;
4015 /* Is this a delegated lock? */
4016 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4017 goto out;
8d0a8a9d 4018 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4019 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4020 status = -ENOMEM;
911d1aaf 4021 if (seqid == NULL)
9b073574 4022 goto out;
cd3758e3 4023 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4024 status = PTR_ERR(task);
4025 if (IS_ERR(task))
9b073574 4026 goto out;
a5d16a4d 4027 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4028 rpc_put_task(task);
9b073574 4029out:
536ff0f8 4030 request->fl_flags = fl_flags;
1da177e4
LT		 4031 return status;
4032}
4033
a5d16a4d
TM		 4034struct nfs4_lockdata {
4035 struct nfs_lock_args arg;
4036 struct nfs_lock_res res;
4037 struct nfs4_lock_state *lsp;
4038 struct nfs_open_context *ctx;
4039 struct file_lock fl;
26e976a8 4040 unsigned long timestamp;
a5d16a4d
TM		 4041 int rpc_status;
4042 int cancelled;
66179efe 4043 struct nfs_server *server;
a5d16a4d
TM		 4044};
4045
4046static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4047 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4048 gfp_t gfp_mask)
1da177e4 4049{
a5d16a4d
TM		 4050 struct nfs4_lockdata *p;
4051 struct inode *inode = lsp->ls_state->inode;
1da177e4 4052 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4053
8535b2be 4054 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4055 if (p == NULL)
4056 return NULL;
4057
4058 p->arg.fh = NFS_FH(inode);
4059 p->arg.fl = &p->fl;
8535b2be 4060 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4061 if (p->arg.open_seqid == NULL)
4062 goto out_free;
8535b2be 4063 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4064 if (p->arg.lock_seqid == NULL)
2f74c0a0 4065 goto out_free_seqid;
a5d16a4d 4066 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4067 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4068 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4069 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4070 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4071 p->lsp = lsp;
66179efe 4072 p->server = server;
a5d16a4d
TM		 4073 atomic_inc(&lsp->ls_count);
4074 p->ctx = get_nfs_open_context(ctx);
4075 memcpy(&p->fl, fl, sizeof(p->fl));
4076 return p;
2f74c0a0
TM		 4077out_free_seqid:
4078 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4079out_free:
4080 kfree(p);
4081 return NULL;
4082}
4083
4084static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4085{
4086 struct nfs4_lockdata *data = calldata;
4087 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4088
3110ff80 4089 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4090 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4091 return;
a5d16a4d
TM		 4092 /* Do we need to do an open_to_lock_owner? */
4093 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4094 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4095 return;
a5d16a4d
TM		 4096 data->arg.open_stateid = &state->stateid;
4097 data->arg.new_lock_owner = 1;
c1d51931 4098 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4099 } else
4100 data->arg.new_lock_owner = 0;
26e976a8 4101 data->timestamp = jiffies;
035168ab
TM		 4102 if (nfs4_setup_sequence(data->server,
4103 &data->arg.seq_args,
66179efe
AA		 4104 &data->res.seq_res, 1, task))
4105 return;
5138fde0 4106 rpc_call_start(task);
3110ff80 4107 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4108}
4109
b257957e
AB		 4110static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4111{
4112 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4113 nfs4_lock_prepare(task, calldata);
4114}
4115
a5d16a4d
TM		 4116static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4117{
4118 struct nfs4_lockdata *data = calldata;
4119
3110ff80 4120 dprintk("%s: begin!\n", __func__);
a5d16a4d 4121
14516c3a
TM		 4122 if (!nfs4_sequence_done(task, &data->res.seq_res))
4123 return;
66179efe 4124
a5d16a4d 4125 data->rpc_status = task->tk_status;
a5d16a4d 4126 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4127 if (data->rpc_status == 0)
4128 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4129 else
4130 goto out;
4131 }
4132 if (data->rpc_status == 0) {
4133 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4134 sizeof(data->lsp->ls_stateid.data));
4135 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4136 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4137 }
a5d16a4d 4138out:
3110ff80 4139 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4140}
4141
4142static void nfs4_lock_release(void *calldata)
4143{
4144 struct nfs4_lockdata *data = calldata;
4145
3110ff80 4146 dprintk("%s: begin!\n", __func__);
2f74c0a0 4147 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4148 if (data->cancelled != 0) {
4149 struct rpc_task *task;
4150 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4151 data->arg.lock_seqid);
4152 if (!IS_ERR(task))
e6b3c4db 4153 rpc_put_task(task);
3110ff80 4154 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4155 } else
4156 nfs_free_seqid(data->arg.lock_seqid);
4157 nfs4_put_lock_state(data->lsp);
4158 put_nfs_open_context(data->ctx);
4159 kfree(data);
3110ff80 4160 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4161}
4162
4163static const struct rpc_call_ops nfs4_lock_ops = {
4164 .rpc_call_prepare = nfs4_lock_prepare,
4165 .rpc_call_done = nfs4_lock_done,
4166 .rpc_release = nfs4_lock_release,
4167};
4168
b257957e
AB		 4169static const struct rpc_call_ops nfs4_recover_lock_ops = {
4170 .rpc_call_prepare = nfs4_recover_lock_prepare,
4171 .rpc_call_done = nfs4_lock_done,
4172 .rpc_release = nfs4_lock_release,
4173};
4174
2bee72a6
TM		 4175static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4176{
4177 struct nfs_client *clp = server->nfs_client;
4178 struct nfs4_state *state = lsp->ls_state;
4179
4180 switch (error) {
4181 case -NFS4ERR_ADMIN_REVOKED:
4182 case -NFS4ERR_BAD_STATEID:
4183 case -NFS4ERR_EXPIRED:
4184 if (new_lock_owner != 0 ||
4185 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4186 nfs4_state_mark_reclaim_nograce(clp, state);
4187 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
a2c0b9e2
TM		 4188 break;
4189 case -NFS4ERR_STALE_STATEID:
4190 if (new_lock_owner != 0 ||
4191 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4192 nfs4_state_mark_reclaim_reboot(clp, state);
4193 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4194 };
4195}
4196
afe6c27c 4197static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4198{
4199 struct nfs4_lockdata *data;
4200 struct rpc_task *task;
5138fde0
TM		 4201 struct rpc_message msg = {
4202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4203 .rpc_cred = state->owner->so_cred,
4204 };
c970aa85
TM		 4205 struct rpc_task_setup task_setup_data = {
4206 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4207 .rpc_message = &msg,
c970aa85 4208 .callback_ops = &nfs4_lock_ops,
101070ca 4209 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4210 .flags = RPC_TASK_ASYNC,
4211 };
a5d16a4d
TM		 4212 int ret;
4213
3110ff80 4214 dprintk("%s: begin!\n", __func__);
cd3758e3 4215 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4216 fl->fl_u.nfs4_fl.owner,
4217 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4218 if (data == NULL)
4219 return -ENOMEM;
4220 if (IS_SETLKW(cmd))
4221 data->arg.block = 1;
b257957e
AB		 4222 if (recovery_type > NFS_LOCK_NEW) {
4223 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4224 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4225 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4226 }
1174dd1f
TM		 4227 msg.rpc_argp = &data->arg;
4228 msg.rpc_resp = &data->res;
c970aa85
TM		 4229 task_setup_data.callback_data = data;
4230 task = rpc_run_task(&task_setup_data);
7a1218a2 4231 if (IS_ERR(task))
a5d16a4d 4232 return PTR_ERR(task);
a5d16a4d
TM		 4233 ret = nfs4_wait_for_completion_rpc_task(task);
4234 if (ret == 0) {
4235 ret = data->rpc_status;
2bee72a6
TM		 4236 if (ret)
4237 nfs4_handle_setlk_error(data->server, data->lsp,
4238 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4239 } else
4240 data->cancelled = 1;
e6b3c4db 4241 rpc_put_task(task);
3110ff80 4242 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4243 return ret;
1da177e4
LT		 4244}
4245
4246static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4247{
202b50dc
TM		 4248 struct nfs_server *server = NFS_SERVER(state->inode);
4249 struct nfs4_exception exception = { };
4250 int err;
4251
4252 do {
42a2d13e
TM		 4253 /* Cache the lock if possible... */
4254 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4255 return 0;
afe6c27c 4256 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4257 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4258 break;
4259 nfs4_handle_exception(server, err, &exception);
4260 } while (exception.retry);
4261 return err;
1da177e4
LT		 4262}
4263
4264static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4265{
202b50dc
TM		 4266 struct nfs_server *server = NFS_SERVER(state->inode);
4267 struct nfs4_exception exception = { };
4268 int err;
4269
6bfc93ef
TM		 4270 err = nfs4_set_lock_state(state, request);
4271 if (err != 0)
4272 return err;
202b50dc 4273 do {
42a2d13e
TM		 4274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4275 return 0;
afe6c27c 4276 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4277 switch (err) {
4278 default:
4279 goto out;
4280 case -NFS4ERR_GRACE:
4281 case -NFS4ERR_DELAY:
4282 nfs4_handle_exception(server, err, &exception);
4283 err = 0;
4284 }
202b50dc 4285 } while (exception.retry);
a9ed2e25 4286out:
202b50dc 4287 return err;
1da177e4
LT		 4288}
4289
4290static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4291{
19e03c57 4292 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4293 unsigned char fl_flags = request->fl_flags;
8e469ebd 4294 int status = -ENOLCK;
1da177e4 4295
8e469ebd
TM		 4296 if ((fl_flags & FL_POSIX) &&
4297 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4298 goto out;
6bfc93ef 4299 /* Is this a delegated open? */
6bfc93ef
TM		 4300 status = nfs4_set_lock_state(state, request);
4301 if (status != 0)
4302 goto out;
01c3b861
TM		 4303 request->fl_flags |= FL_ACCESS;
4304 status = do_vfs_lock(request->fl_file, request);
4305 if (status < 0)
4306 goto out;
19e03c57 4307 down_read(&nfsi->rwsem);
01c3b861 4308 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4309 /* Yes: cache locks! */
01c3b861 4310 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4311 request->fl_flags = fl_flags & ~FL_SLEEP;
4312 status = do_vfs_lock(request->fl_file, request);
4313 goto out_unlock;
01c3b861 4314 }
afe6c27c 4315 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4316 if (status != 0)
01c3b861 4317 goto out_unlock;
6bfc93ef 4318 /* Note: we always want to sleep here! */
01c3b861 4319 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4320 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4321 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4322out_unlock:
19e03c57 4323 up_read(&nfsi->rwsem);
01c3b861
TM		 4324out:
4325 request->fl_flags = fl_flags;
1da177e4
LT		 4326 return status;
4327}
4328
4329static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4330{
4331 struct nfs4_exception exception = { };
4332 int err;
4333
4334 do {
965b5d67
TM		 4335 err = _nfs4_proc_setlk(state, cmd, request);
4336 if (err == -NFS4ERR_DENIED)
4337 err = -EAGAIN;
1da177e4 4338 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4339 err, &exception);
1da177e4
LT		 4340 } while (exception.retry);
4341 return err;
4342}
4343
4344static int
4345nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4346{
4347 struct nfs_open_context *ctx;
4348 struct nfs4_state *state;
4349 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4350 int status;
4351
4352 /* verify open state */
cd3758e3 4353 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4354 state = ctx->state;
4355
4356 if (request->fl_start < 0 || request->fl_end < 0)
4357 return -EINVAL;
4358
d953126a
TM		 4359 if (IS_GETLK(cmd)) {
4360 if (state != NULL)
4361 return nfs4_proc_getlk(state, F_GETLK, request);
4362 return 0;
4363 }
1da177e4
LT		 4364
4365 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4366 return -EINVAL;
4367
d953126a
TM		 4368 if (request->fl_type == F_UNLCK) {
4369 if (state != NULL)
4370 return nfs4_proc_unlck(state, cmd, request);
4371 return 0;
4372 }
1da177e4 4373
d953126a
TM		 4374 if (state == NULL)
4375 return -ENOLCK;
1da177e4
LT		 4376 do {
4377 status = nfs4_proc_setlk(state, cmd, request);
4378 if ((status != -EAGAIN) || IS_SETLK(cmd))
4379 break;
4380 timeout = nfs4_set_lock_task_retry(timeout);
4381 status = -ERESTARTSYS;
4382 if (signalled())
4383 break;
4384 } while(status < 0);
1da177e4
LT		 4385 return status;
4386}
4387
888e694c
TM		 4388int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4389{
4390 struct nfs_server *server = NFS_SERVER(state->inode);
4391 struct nfs4_exception exception = { };
4392 int err;
4393
4394 err = nfs4_set_lock_state(state, fl);
4395 if (err != 0)
4396 goto out;
4397 do {
afe6c27c 4398 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4399 switch (err) {
4400 default:
4401 printk(KERN_ERR "%s: unhandled error %d.\n",
4402 __func__, err);
4403 case 0:
965b5d67 4404 case -ESTALE:
d5122201
TM		 4405 goto out;
4406 case -NFS4ERR_EXPIRED:
4407 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4408 case -NFS4ERR_STALE_STATEID:
74e7bb73
RL		 4409 case -NFS4ERR_BADSESSION:
4410 case -NFS4ERR_BADSLOT:
4411 case -NFS4ERR_BAD_HIGH_SLOT:
4412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4413 case -NFS4ERR_DEADSESSION:
d5122201
TM		 4414 nfs4_schedule_state_recovery(server->nfs_client);
4415 goto out;
965b5d67
TM		 4416 case -ERESTARTSYS:
4417 /*
4418 * The show must go on: exit, but mark the
4419 * stateid as needing recovery.
4420 */
4421 case -NFS4ERR_ADMIN_REVOKED:
4422 case -NFS4ERR_BAD_STATEID:
4423 case -NFS4ERR_OPENMODE:
4424 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4425 err = 0;
4426 goto out;
168667c4
TM		 4427 case -EKEYEXPIRED:
4428 /*
4429 * User RPCSEC_GSS context has expired.
4430 * We cannot recover this stateid now, so
4431 * skip it and allow recovery thread to
4432 * proceed.
4433 */
4434 err = 0;
4435 goto out;
965b5d67
TM		 4436 case -ENOMEM:
4437 case -NFS4ERR_DENIED:
4438 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4439 err = 0;
4440 goto out;
d5122201
TM		 4441 case -NFS4ERR_DELAY:
4442 break;
4443 }
888e694c
TM		 4444 err = nfs4_handle_exception(server, err, &exception);
4445 } while (exception.retry);
4446out:
4447 return err;
4448}
6b3b5496 4449
d3c7b7cc
TM		 4450static void nfs4_release_lockowner_release(void *calldata)
4451{
4452 kfree(calldata);
4453}
4454
4455const struct rpc_call_ops nfs4_release_lockowner_ops = {
4456 .rpc_release = nfs4_release_lockowner_release,
4457};
4458
4459void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4460{
4461 struct nfs_server *server = lsp->ls_state->owner->so_server;
4462 struct nfs_release_lockowner_args *args;
4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4465 };
4466
4467 if (server->nfs_client->cl_mvops->minor_version != 0)
4468 return;
4469 args = kmalloc(sizeof(*args), GFP_NOFS);
4470 if (!args)
4471 return;
4472 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4473 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4474 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4475 msg.rpc_argp = args;
4476 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4477}
4478
aa1870af
BF		 4479#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4480
64c2ce8b
AK		 4481static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4482 const void *buf, size_t buflen,
4483 int flags, int type)
6b3b5496 4484{
64c2ce8b
AK		 4485 if (strcmp(key, "") != 0)
4486 return -EINVAL;
4b580ee3 4487
64c2ce8b 4488 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4489}
4490
64c2ce8b
AK		 4491static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4492 void *buf, size_t buflen, int type)
6b3b5496 4493{
64c2ce8b
AK		 4494 if (strcmp(key, "") != 0)
4495 return -EINVAL;
aa1870af 4496
64c2ce8b 4497 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4498}
4499
64c2ce8b
AK		 4500static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4501 size_t list_len, const char *name,
4502 size_t name_len, int type)
6b3b5496 4503{
64c2ce8b 4504 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4505
096455a2
BF		 4506 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4507 return 0;
64c2ce8b
AK		 4508
4509 if (list && len <= list_len)
4510 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4511 return len;
6b3b5496
BF		 4512}
4513
69aaaae1
TM		 4514static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4515{
4516 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4517 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4518 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4519 return;
4520
4521 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4522 NFS_ATTR_FATTR_NLINK;
4523 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4524 fattr->nlink = 2;
4525}
4526
56659e99 4527int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4528 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4529{
4530 struct nfs_server *server = NFS_SERVER(dir);
4531 u32 bitmask[2] = {
361e624f
MN		 4532 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4533 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4534 };
4535 struct nfs4_fs_locations_arg args = {
4536 .dir_fh = NFS_FH(dir),
c228fd3a 4537 .name = name,
683b57b4
TM		 4538 .page = page,
4539 .bitmask = bitmask,
4540 };
22958463
BH		 4541 struct nfs4_fs_locations_res res = {
4542 .fs_locations = fs_locations,
4543 };
683b57b4
TM		 4544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4546 .rpc_argp = &args,
22958463 4547 .rpc_resp = &res,
683b57b4
TM		 4548 };
4549 int status;
4550
3110ff80 4551 dprintk("%s: start\n", __func__);
c228fd3a 4552 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4553 fs_locations->server = server;
830b8e33 4554 fs_locations->nlocations = 0;
cccef3b9 4555 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4556 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4557 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4558 return status;
4559}
4560
557134a3 4561#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4562/*
4563 * Check the exchange flags returned by the server for invalid flags, having
4564 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4565 * DS flags set.
4566 */
4567static int nfs4_check_cl_exchange_flags(u32 flags)
4568{
4569 if (flags & ~EXCHGID4_FLAG_MASK_R)
4570 goto out_inval;
4571 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4572 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4573 goto out_inval;
4574 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4575 goto out_inval;
4576 return NFS_OK;
4577out_inval:
4578 return -NFS4ERR_INVAL;
4579}
4580
99fe60d0
BH		 4581/*
4582 * nfs4_proc_exchange_id()
4583 *
4584 * Since the clientid has expired, all compounds using sessions
4585 * associated with the stale clientid will be returning
4586 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4587 * be in some phase of session reset.
4588 */
4d643d1d 4589int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4590{
4591 nfs4_verifier verifier;
4592 struct nfs41_exchange_id_args args = {
4593 .client = clp,
357f54d6 4594 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4595 };
4596 struct nfs41_exchange_id_res res = {
4597 .client = clp,
4598 };
4599 int status;
4600 struct rpc_message msg = {
4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4602 .rpc_argp = &args,
4603 .rpc_resp = &res,
4604 .rpc_cred = cred,
4605 };
4606 __be32 *p;
4607
4608 dprintk("--> %s\n", __func__);
4609 BUG_ON(clp == NULL);
a7b72103 4610
99fe60d0
BH		 4611 p = (u32 *)verifier.data;
4612 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4613 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4614 args.verifier = &verifier;
4615
c7a360b0
AA		 4616 args.id_len = scnprintf(args.id, sizeof(args.id),
4617 "%s/%s.%s/%u",
4618 clp->cl_ipaddr,
4619 init_utsname()->nodename,
4620 init_utsname()->domainname,
4621 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4622
c7a360b0
AA		 4623 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4624 if (!status)
4625 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4626 dprintk("<-- %s status= %d\n", __func__, status);
4627 return status;
4628}
4629
2050f0cc
AA		 4630struct nfs4_get_lease_time_data {
4631 struct nfs4_get_lease_time_args *args;
4632 struct nfs4_get_lease_time_res *res;
4633 struct nfs_client *clp;
4634};
4635
4636static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4637 void *calldata)
4638{
4639 int ret;
4640 struct nfs4_get_lease_time_data *data =
4641 (struct nfs4_get_lease_time_data *)calldata;
4642
4643 dprintk("--> %s\n", __func__);
689cf5c1 4644 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4645 /* just setup sequence, do not trigger session recovery
4646 since we're invoked within one */
4647 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4648 &data->args->la_seq_args,
4649 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4650
4651 BUG_ON(ret == -EAGAIN);
4652 rpc_call_start(task);
4653 dprintk("<-- %s\n", __func__);
4654}
4655
4656/*
4657 * Called from nfs4_state_manager thread for session setup, so don't recover
4658 * from sequence operation or clientid errors.
4659 */
4660static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4661{
4662 struct nfs4_get_lease_time_data *data =
4663 (struct nfs4_get_lease_time_data *)calldata;
4664
4665 dprintk("--> %s\n", __func__);
14516c3a
TM		 4666 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4667 return;
2050f0cc
AA		 4668 switch (task->tk_status) {
4669 case -NFS4ERR_DELAY:
4670 case -NFS4ERR_GRACE:
4671 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4672 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4673 task->tk_status = 0;
0110ee15 4674 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4675 return;
4676 }
2050f0cc
AA		 4677 dprintk("<-- %s\n", __func__);
4678}
4679
4680struct rpc_call_ops nfs4_get_lease_time_ops = {
4681 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4682 .rpc_call_done = nfs4_get_lease_time_done,
4683};
4684
4685int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4686{
4687 struct rpc_task *task;
4688 struct nfs4_get_lease_time_args args;
4689 struct nfs4_get_lease_time_res res = {
4690 .lr_fsinfo = fsinfo,
4691 };
4692 struct nfs4_get_lease_time_data data = {
4693 .args = &args,
4694 .res = &res,
4695 .clp = clp,
4696 };
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4699 .rpc_argp = &args,
4700 .rpc_resp = &res,
4701 };
4702 struct rpc_task_setup task_setup = {
4703 .rpc_client = clp->cl_rpcclient,
4704 .rpc_message = &msg,
4705 .callback_ops = &nfs4_get_lease_time_ops,
4706 .callback_data = &data
4707 };
4708 int status;
4709
2050f0cc
AA		 4710 dprintk("--> %s\n", __func__);
4711 task = rpc_run_task(&task_setup);
4712
4713 if (IS_ERR(task))
4714 status = PTR_ERR(task);
4715 else {
4716 status = task->tk_status;
4717 rpc_put_task(task);
4718 }
4719 dprintk("<-- %s return %d\n", __func__, status);
4720
4721 return status;
4722}
4723
b73dafa7
RL		 4724/*
4725 * Reset a slot table
4726 */
104aeba4
AA		 4727static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4728 int ivalue)
ac72b7b3 4729{
104aeba4 4730 struct nfs4_slot *new = NULL;
b73dafa7 4731 int i;
ac72b7b3
AA		 4732 int ret = 0;
4733
104aeba4
AA		 4734 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4735 max_reqs, tbl->max_slots);
ac72b7b3 4736
104aeba4
AA		 4737 /* Does the newly negotiated max_reqs match the existing slot table? */
4738 if (max_reqs != tbl->max_slots) {
4739 ret = -ENOMEM;
4740 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4741 GFP_NOFS);
104aeba4
AA		 4742 if (!new)
4743 goto out;
4744 ret = 0;
4745 kfree(tbl->slots);
ac72b7b3
AA		 4746 }
4747 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4748 if (new) {
4749 tbl->slots = new;
4750 tbl->max_slots = max_reqs;
4751 }
4752 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4753 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4754 spin_unlock(&tbl->slot_tbl_lock);
4755 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4756 tbl, tbl->slots, tbl->max_slots);
4757out:
4758 dprintk("<-- %s: return %d\n", __func__, ret);
4759 return ret;
4760}
4761
b73dafa7
RL		 4762/*
4763 * Reset the forechannel and backchannel slot tables
4764 */
4765static int nfs4_reset_slot_tables(struct nfs4_session *session)
4766{
4767 int status;
4768
4769 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4770 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4771 if (status)
4772 return status;
4773
4774 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4775 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4776 return status;
4777}
4778
f8625a6a
RL		 4779/* Destroy the slot table */
4780static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4781{
4782 if (session->fc_slot_table.slots != NULL) {
4783 kfree(session->fc_slot_table.slots);
4784 session->fc_slot_table.slots = NULL;
4785 }
4786 if (session->bc_slot_table.slots != NULL) {
4787 kfree(session->bc_slot_table.slots);
4788 session->bc_slot_table.slots = NULL;
4789 }
4790 return;
4791}
4792
fc931582
AA		 4793/*
4794 * Initialize slot table
4795 */
050047ce
RL		 4796static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4797 int max_slots, int ivalue)
fc931582 4798{
fc931582
AA		 4799 struct nfs4_slot *slot;
4800 int ret = -ENOMEM;
4801
4802 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4803
050047ce 4804 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4805
8535b2be 4806 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4807 if (!slot)
4808 goto out;
fc931582
AA		 4809 ret = 0;
4810
4811 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4812 tbl->max_slots = max_slots;
4813 tbl->slots = slot;
4814 tbl->highest_used_slotid = -1; /* no slot is currently used */
4815 spin_unlock(&tbl->slot_tbl_lock);
4816 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4817 tbl, tbl->slots, tbl->max_slots);
4818out:
4819 dprintk("<-- %s: return %d\n", __func__, ret);
4820 return ret;
fc931582
AA		 4821}
4822
050047ce
RL		 4823/*
4824 * Initialize the forechannel and backchannel tables
4825 */
4826static int nfs4_init_slot_tables(struct nfs4_session *session)
4827{
f26468fb
TM		 4828 struct nfs4_slot_table *tbl;
4829 int status = 0;
050047ce 4830
f26468fb
TM		 4831 tbl = &session->fc_slot_table;
4832 if (tbl->slots == NULL) {
4833 status = nfs4_init_slot_table(tbl,
4834 session->fc_attrs.max_reqs, 1);
4835 if (status)
4836 return status;
4837 }
050047ce 4838
f26468fb
TM		 4839 tbl = &session->bc_slot_table;
4840 if (tbl->slots == NULL) {
4841 status = nfs4_init_slot_table(tbl,
4842 session->bc_attrs.max_reqs, 0);
4843 if (status)
4844 nfs4_destroy_slot_tables(session);
4845 }
f8625a6a
RL		 4846
4847 return status;
557134a3
AA		 4848}
4849
4850struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4851{
4852 struct nfs4_session *session;
4853 struct nfs4_slot_table *tbl;
4854
8535b2be 4855 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4856 if (!session)
4857 return NULL;
76db6d95 4858
557134a3 4859 tbl = &session->fc_slot_table;
9dfdf404 4860 tbl->highest_used_slotid = -1;
557134a3 4861 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4862 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 4863 init_completion(&tbl->complete);
f8625a6a
RL		 4864
4865 tbl = &session->bc_slot_table;
9dfdf404 4866 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4867 spin_lock_init(&tbl->slot_tbl_lock);
4868 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 4869 init_completion(&tbl->complete);
f8625a6a 4870
1055d76d
TM		 4871 session->session_state = 1<<NFS4_SESSION_INITING;
4872
557134a3
AA		 4873 session->clp = clp;
4874 return session;
4875}
4876
4877void nfs4_destroy_session(struct nfs4_session *session)
4878{
5a0ffe54
AA		 4879 nfs4_proc_destroy_session(session);
4880 dprintk("%s Destroy backchannel for xprt %p\n",
4881 __func__, session->clp->cl_rpcclient->cl_xprt);
4882 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4883 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4884 nfs4_destroy_slot_tables(session);
557134a3
AA		 4885 kfree(session);
4886}
4887
fc931582
AA		 4888/*
4889 * Initialize the values to be used by the client in CREATE_SESSION
4890 * If nfs4_init_session set the fore channel request and response sizes,
4891 * use them.
4892 *
4893 * Set the back channel max_resp_sz_cached to zero to force the client to
4894 * always set csa_cachethis to FALSE because the current implementation
4895 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4896 */
4897static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4898{
4899 struct nfs4_session *session = args->client->cl_session;
4900 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4901 mxresp_sz = session->fc_attrs.max_resp_sz;
4902
4903 if (mxrqst_sz == 0)
4904 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4905 if (mxresp_sz == 0)
4906 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4907 /* Fore channel attributes */
4908 args->fc_attrs.headerpadsz = 0;
4909 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4910 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4911 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4912 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4913
4914 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4915 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4916 __func__,
4917 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4918 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4919
4920 /* Back channel attributes */
4921 args->bc_attrs.headerpadsz = 0;
4922 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4923 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4924 args->bc_attrs.max_resp_sz_cached = 0;
4925 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4926 args->bc_attrs.max_reqs = 1;
4927
4928 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4929 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4930 __func__,
4931 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4932 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4933 args->bc_attrs.max_reqs);
4934}
4935
43c2e885 4936static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 4937{
43c2e885
BF		 4938 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4939 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4940
4941 if (rcvd->headerpadsz > sent->headerpadsz)
4942 return -EINVAL;
4943 if (rcvd->max_resp_sz > sent->max_resp_sz)
4944 return -EINVAL;
4945 /*
4946 * Our requested max_ops is the minimum we need; we're not
4947 * prepared to break up compounds into smaller pieces than that.
4948 * So, no point even trying to continue if the server won't
4949 * cooperate:
4950 */
4951 if (rcvd->max_ops < sent->max_ops)
4952 return -EINVAL;
4953 if (rcvd->max_reqs == 0)
4954 return -EINVAL;
4955 return 0;
8d35301d
AA		 4956}
4957
43c2e885
BF		 4958static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4959{
4960 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4961 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 4962
43c2e885
BF		 4963 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4964 return -EINVAL;
4965 if (rcvd->max_resp_sz < sent->max_resp_sz)
4966 return -EINVAL;
4967 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4968 return -EINVAL;
4969 /* These would render the backchannel useless: */
4970 if (rcvd->max_ops == 0)
4971 return -EINVAL;
4972 if (rcvd->max_reqs == 0)
4973 return -EINVAL;
4974 return 0;
4975}
8d35301d 4976
8d35301d
AA		 4977static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4978 struct nfs4_session *session)
4979{
43c2e885 4980 int ret;
8d35301d 4981
43c2e885
BF		 4982 ret = nfs4_verify_fore_channel_attrs(args, session);
4983 if (ret)
4984 return ret;
4985 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 4986}
4987
fc931582
AA		 4988static int _nfs4_proc_create_session(struct nfs_client *clp)
4989{
4990 struct nfs4_session *session = clp->cl_session;
4991 struct nfs41_create_session_args args = {
4992 .client = clp,
4993 .cb_program = NFS4_CALLBACK,
4994 };
4995 struct nfs41_create_session_res res = {
4996 .client = clp,
4997 };
4998 struct rpc_message msg = {
4999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5000 .rpc_argp = &args,
5001 .rpc_resp = &res,
5002 };
5003 int status;
5004
5005 nfs4_init_channel_attrs(&args);
0f91421e 5006 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5007
5008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5009
8d35301d
AA		 5010 if (!status)
5011 /* Verify the session's negotiated channel_attrs values */
5012 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5013 if (!status) {
5014 /* Increment the clientid slot sequence id */
5015 clp->cl_seqid++;
5016 }
5017
5018 return status;
5019}
5020
5021/*
5022 * Issues a CREATE_SESSION operation to the server.
5023 * It is the responsibility of the caller to verify the session is
5024 * expired before calling this routine.
5025 */
f26468fb 5026int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5027{
5028 int status;
5029 unsigned *ptr;
fc931582
AA		 5030 struct nfs4_session *session = clp->cl_session;
5031
5032 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5033
5034 status = _nfs4_proc_create_session(clp);
5035 if (status)
5036 goto out;
5037
f26468fb
TM		 5038 /* Init and reset the fore channel */
5039 status = nfs4_init_slot_tables(session);
5040 dprintk("slot table initialization returned %d\n", status);
5041 if (status)
5042 goto out;
5043 status = nfs4_reset_slot_tables(session);
5044 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5045 if (status)
5046 goto out;
5047
5048 ptr = (unsigned *)&session->sess_id.data[0];
5049 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5050 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5051out:
5052 dprintk("<-- %s\n", __func__);
5053 return status;
5054}
5055
0f3e66c6
AA		 5056/*
5057 * Issue the over-the-wire RPC DESTROY_SESSION.
5058 * The caller must serialize access to this routine.
5059 */
5060int nfs4_proc_destroy_session(struct nfs4_session *session)
5061{
5062 int status = 0;
5063 struct rpc_message msg;
5064
5065 dprintk("--> nfs4_proc_destroy_session\n");
5066
5067 /* session is still being setup */
5068 if (session->clp->cl_cons_state != NFS_CS_READY)
5069 return status;
5070
5071 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5072 msg.rpc_argp = session;
5073 msg.rpc_resp = NULL;
5074 msg.rpc_cred = NULL;
5075 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5076
5077 if (status)
5078 printk(KERN_WARNING
5079 "Got error %d from the server on DESTROY_SESSION. "
5080 "Session has been destroyed regardless...\n", status);
5081
5082 dprintk("<-- nfs4_proc_destroy_session\n");
5083 return status;
5084}
5085
fccba804
TM		 5086int nfs4_init_session(struct nfs_server *server)
5087{
5088 struct nfs_client *clp = server->nfs_client;
2449ea2e 5089 struct nfs4_session *session;
68bf05ef 5090 unsigned int rsize, wsize;
fccba804
TM		 5091 int ret;
5092
5093 if (!nfs4_has_session(clp))
5094 return 0;
5095
1055d76d
TM		 5096 session = clp->cl_session;
5097 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5098 return 0;
5099
68bf05ef
AA		 5100 rsize = server->rsize;
5101 if (rsize == 0)
5102 rsize = NFS_MAX_FILE_IO_SIZE;
5103 wsize = server->wsize;
5104 if (wsize == 0)
5105 wsize = NFS_MAX_FILE_IO_SIZE;
5106
68bf05ef
AA		 5107 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5108 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5109
fccba804
TM		 5110 ret = nfs4_recover_expired_lease(server);
5111 if (!ret)
5112 ret = nfs4_check_client_ready(clp);
5113 return ret;
5114}
5115
fc01cea9
AA		 5116/*
5117 * Renew the cl_session lease.
5118 */
d5f8d3fe
TM		 5119struct nfs4_sequence_data {
5120 struct nfs_client *clp;
5121 struct nfs4_sequence_args args;
5122 struct nfs4_sequence_res res;
5123};
5124
dc96aef9
AB		 5125static void nfs41_sequence_release(void *data)
5126{
d5f8d3fe
TM		 5127 struct nfs4_sequence_data *calldata = data;
5128 struct nfs_client *clp = calldata->clp;
dc96aef9 5129
7135840f
AB		 5130 if (atomic_read(&clp->cl_count) > 1)
5131 nfs4_schedule_state_renewal(clp);
5132 nfs_put_client(clp);
d5f8d3fe 5133 kfree(calldata);
dc96aef9
AB		 5134}
5135
aa5190d0
TM		 5136static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5137{
5138 switch(task->tk_status) {
5139 case -NFS4ERR_DELAY:
aa5190d0
TM		 5140 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5141 return -EAGAIN;
5142 default:
5143 nfs4_schedule_state_recovery(clp);
5144 }
5145 return 0;
5146}
5147
dc96aef9 5148static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5149{
d5f8d3fe
TM		 5150 struct nfs4_sequence_data *calldata = data;
5151 struct nfs_client *clp = calldata->clp;
fc01cea9 5152
14516c3a
TM		 5153 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5154 return;
fc01cea9
AA		 5155
5156 if (task->tk_status < 0) {
5157 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5158 if (atomic_read(&clp->cl_count) == 1)
5159 goto out;
fc01cea9 5160
aa5190d0
TM		 5161 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5162 rpc_restart_call_prepare(task);
fc01cea9
AA		 5163 return;
5164 }
5165 }
fc01cea9 5166 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5167out:
fc01cea9
AA		 5168 dprintk("<-- %s\n", __func__);
5169}
5170
5171static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5172{
d5f8d3fe
TM		 5173 struct nfs4_sequence_data *calldata = data;
5174 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5175 struct nfs4_sequence_args *args;
5176 struct nfs4_sequence_res *res;
5177
fc01cea9
AA		 5178 args = task->tk_msg.rpc_argp;
5179 res = task->tk_msg.rpc_resp;
5180
035168ab 5181 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5182 return;
5183 rpc_call_start(task);
5184}
5185
5186static const struct rpc_call_ops nfs41_sequence_ops = {
5187 .rpc_call_done = nfs41_sequence_call_done,
5188 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5189 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5190};
5191
71ac6da9 5192static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5193{
d5f8d3fe 5194 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5195 struct rpc_message msg = {
5196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5197 .rpc_cred = cred,
5198 };
71ac6da9
TM		 5199 struct rpc_task_setup task_setup_data = {
5200 .rpc_client = clp->cl_rpcclient,
5201 .rpc_message = &msg,
5202 .callback_ops = &nfs41_sequence_ops,
5203 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5204 };
fc01cea9 5205
7135840f 5206 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5207 return ERR_PTR(-EIO);
dfb4f309 5208 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5209 if (calldata == NULL) {
7135840f 5210 nfs_put_client(clp);
71ac6da9 5211 return ERR_PTR(-ENOMEM);
fc01cea9 5212 }
d5f8d3fe
TM		 5213 msg.rpc_argp = &calldata->args;
5214 msg.rpc_resp = &calldata->res;
5215 calldata->clp = clp;
71ac6da9 5216 task_setup_data.callback_data = calldata;
fc01cea9 5217
71ac6da9
TM		 5218 return rpc_run_task(&task_setup_data);
5219}
5220
5221static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5222{
5223 struct rpc_task *task;
5224 int ret = 0;
5225
5226 task = _nfs41_proc_sequence(clp, cred);
5227 if (IS_ERR(task))
5228 ret = PTR_ERR(task);
5229 else
5230 rpc_put_task(task);
5231 dprintk("<-- %s status=%d\n", __func__, ret);
5232 return ret;
5233}
5234
5235static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5236{
5237 struct rpc_task *task;
5238 int ret;
5239
5240 task = _nfs41_proc_sequence(clp, cred);
5241 if (IS_ERR(task)) {
5242 ret = PTR_ERR(task);
5243 goto out;
5244 }
5245 ret = rpc_wait_for_completion_task(task);
5246 if (!ret)
5247 ret = task->tk_status;
5248 rpc_put_task(task);
5249out:
5250 dprintk("<-- %s status=%d\n", __func__, ret);
5251 return ret;
fc01cea9
AA		 5252}
5253
fce5c838
RL		 5254struct nfs4_reclaim_complete_data {
5255 struct nfs_client *clp;
5256 struct nfs41_reclaim_complete_args arg;
5257 struct nfs41_reclaim_complete_res res;
5258};
5259
5260static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5261{
5262 struct nfs4_reclaim_complete_data *calldata = data;
5263
b257957e 5264 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5265 if (nfs41_setup_sequence(calldata->clp->cl_session,
5266 &calldata->arg.seq_args,
fce5c838
RL		 5267 &calldata->res.seq_res, 0, task))
5268 return;
5269
5270 rpc_call_start(task);
5271}
5272
aa5190d0
TM		 5273static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5274{
5275 switch(task->tk_status) {
5276 case 0:
5277 case -NFS4ERR_COMPLETE_ALREADY:
5278 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5279 break;
5280 case -NFS4ERR_DELAY:
aa5190d0
TM		 5281 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5282 return -EAGAIN;
5283 default:
5284 nfs4_schedule_state_recovery(clp);
5285 }
5286 return 0;
5287}
5288
fce5c838
RL		 5289static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5290{
5291 struct nfs4_reclaim_complete_data *calldata = data;
5292 struct nfs_client *clp = calldata->clp;
5293 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5294
5295 dprintk("--> %s\n", __func__);
14516c3a
TM		 5296 if (!nfs41_sequence_done(task, res))
5297 return;
fce5c838 5298
aa5190d0
TM		 5299 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5300 rpc_restart_call_prepare(task);
5301 return;
5302 }
fce5c838
RL		 5303 dprintk("<-- %s\n", __func__);
5304}
5305
5306static void nfs4_free_reclaim_complete_data(void *data)
5307{
5308 struct nfs4_reclaim_complete_data *calldata = data;
5309
5310 kfree(calldata);
5311}
5312
5313static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5314 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5315 .rpc_call_done = nfs4_reclaim_complete_done,
5316 .rpc_release = nfs4_free_reclaim_complete_data,
5317};
5318
5319/*
5320 * Issue a global reclaim complete.
5321 */
5322static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5323{
5324 struct nfs4_reclaim_complete_data *calldata;
5325 struct rpc_task *task;
5326 struct rpc_message msg = {
5327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5328 };
5329 struct rpc_task_setup task_setup_data = {
5330 .rpc_client = clp->cl_rpcclient,
5331 .rpc_message = &msg,
5332 .callback_ops = &nfs4_reclaim_complete_call_ops,
5333 .flags = RPC_TASK_ASYNC,
5334 };
5335 int status = -ENOMEM;
5336
5337 dprintk("--> %s\n", __func__);
8535b2be 5338 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5339 if (calldata == NULL)
5340 goto out;
5341 calldata->clp = clp;
5342 calldata->arg.one_fs = 0;
fce5c838
RL		 5343
5344 msg.rpc_argp = &calldata->arg;
5345 msg.rpc_resp = &calldata->res;
5346 task_setup_data.callback_data = calldata;
5347 task = rpc_run_task(&task_setup_data);
acf82b85 5348 if (IS_ERR(task)) {
fce5c838 5349 status = PTR_ERR(task);
acf82b85
DC		 5350 goto out;
5351 }
fce5c838 5352 rpc_put_task(task);
acf82b85 5353 return 0;
fce5c838
RL		 5354out:
5355 dprintk("<-- %s status=%d\n", __func__, status);
5356 return status;
5357}
b1f69b75
AA		 5358
5359static void
5360nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5361{
5362 struct nfs4_layoutget *lgp = calldata;
c31663d4 5363 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5364
5365 dprintk("--> %s\n", __func__);
c31663d4
FI		 5366 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5367 * right now covering the LAYOUTGET we are about to send.
5368 * However, that is not so catastrophic, and there seems
5369 * to be no way to prevent it completely.
5370 */
b1f69b75
AA		 5371 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5372 &lgp->res.seq_res, 0, task))
5373 return;
cf7d63f1
FI		 5374 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5375 NFS_I(lgp->args.inode)->layout,
5376 lgp->args.ctx->state)) {
5377 rpc_exit(task, NFS4_OK);
5378 return;
5379 }
b1f69b75
AA		 5380 rpc_call_start(task);
5381}
5382
5383static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5384{
5385 struct nfs4_layoutget *lgp = calldata;
5386 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5387
5388 dprintk("--> %s\n", __func__);
5389
5390 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5391 return;
5392
5393 switch (task->tk_status) {
5394 case 0:
5395 break;
5396 case -NFS4ERR_LAYOUTTRYLATER:
5397 case -NFS4ERR_RECALLCONFLICT:
5398 task->tk_status = -NFS4ERR_DELAY;
5399 /* Fall through */
5400 default:
5401 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5402 rpc_restart_call_prepare(task);
5403 return;
5404 }
5405 }
b1f69b75
AA		 5406 dprintk("<-- %s\n", __func__);
5407}
5408
5409static void nfs4_layoutget_release(void *calldata)
5410{
5411 struct nfs4_layoutget *lgp = calldata;
5412
5413 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5414 if (lgp->res.layout.buf != NULL)
5415 free_page((unsigned long) lgp->res.layout.buf);
5416 put_nfs_open_context(lgp->args.ctx);
5417 kfree(calldata);
5418 dprintk("<-- %s\n", __func__);
5419}
5420
5421static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5422 .rpc_call_prepare = nfs4_layoutget_prepare,
5423 .rpc_call_done = nfs4_layoutget_done,
5424 .rpc_release = nfs4_layoutget_release,
5425};
5426
5427int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5428{
5429 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5430 struct rpc_task *task;
5431 struct rpc_message msg = {
5432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5433 .rpc_argp = &lgp->args,
5434 .rpc_resp = &lgp->res,
5435 };
5436 struct rpc_task_setup task_setup_data = {
5437 .rpc_client = server->client,
5438 .rpc_message = &msg,
5439 .callback_ops = &nfs4_layoutget_call_ops,
5440 .callback_data = lgp,
5441 .flags = RPC_TASK_ASYNC,
5442 };
5443 int status = 0;
5444
5445 dprintk("--> %s\n", __func__);
5446
5447 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5448 if (lgp->res.layout.buf == NULL) {
5449 nfs4_layoutget_release(lgp);
5450 return -ENOMEM;
5451 }
5452
5453 lgp->res.seq_res.sr_slot = NULL;
5454 task = rpc_run_task(&task_setup_data);
5455 if (IS_ERR(task))
5456 return PTR_ERR(task);
5457 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5458 if (status == 0)
5459 status = task->tk_status;
5460 if (status == 0)
5461 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5462 rpc_put_task(task);
5463 dprintk("<-- %s status=%d\n", __func__, status);
5464 return status;
5465}
5466
5467static int
5468_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5469{
5470 struct nfs4_getdeviceinfo_args args = {
5471 .pdev = pdev,
5472 };
5473 struct nfs4_getdeviceinfo_res res = {
5474 .pdev = pdev,
5475 };
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5478 .rpc_argp = &args,
5479 .rpc_resp = &res,
5480 };
5481 int status;
5482
5483 dprintk("--> %s\n", __func__);
5484 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5485 dprintk("<-- %s status=%d\n", __func__, status);
5486
5487 return status;
5488}
5489
5490int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5491{
5492 struct nfs4_exception exception = { };
5493 int err;
5494
5495 do {
5496 err = nfs4_handle_exception(server,
5497 _nfs4_proc_getdeviceinfo(server, pdev),
5498 &exception);
5499 } while (exception.retry);
5500 return err;
5501}
5502EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5503
557134a3
AA		 5504#endif /* CONFIG_NFS_V4_1 */
5505
591d71cb 5506struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5507 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5508 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5509 .recover_open = nfs4_open_reclaim,
5510 .recover_lock = nfs4_lock_reclaim,
591d71cb 5511 .establish_clid = nfs4_init_clientid,
90a16617 5512 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5513};
5514
591d71cb
AA		 5515#if defined(CONFIG_NFS_V4_1)
5516struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5517 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5518 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5519 .recover_open = nfs4_open_reclaim,
5520 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5521 .establish_clid = nfs41_init_clientid,
b4b82607 5522 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5523 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5524};
5525#endif /* CONFIG_NFS_V4_1 */
5526
5527struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5528 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5529 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5530 .recover_open = nfs4_open_expired,
5531 .recover_lock = nfs4_lock_expired,
5532 .establish_clid = nfs4_init_clientid,
90a16617 5533 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5534};
5535
5536#if defined(CONFIG_NFS_V4_1)
5537struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5538 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5539 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5540 .recover_open = nfs4_open_expired,
5541 .recover_lock = nfs4_lock_expired,
4d643d1d 5542 .establish_clid = nfs41_init_clientid,
b4b82607 5543 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5544};
591d71cb 5545#endif /* CONFIG_NFS_V4_1 */
1da177e4 5546
29fba38b
BH		 5547struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5548 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5549 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5550 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5551};
5552
5553#if defined(CONFIG_NFS_V4_1)
5554struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5555 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5556 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5557 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5558};
5559#endif
5560
97dc1359
TM		 5561static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5562 .minor_version = 0,
5563 .call_sync = _nfs4_call_sync,
e047a10c 5564 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5565 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5566 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5567 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5568};
5569
5570#if defined(CONFIG_NFS_V4_1)
5571static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5572 .minor_version = 1,
5573 .call_sync = _nfs4_call_sync_session,
e047a10c 5574 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5575 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5576 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5577 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5578};
5579#endif
5580
97dc1359
TM		 5581const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5582 [0] = &nfs_v4_0_minor_ops,
5583#if defined(CONFIG_NFS_V4_1)
5584 [1] = &nfs_v4_1_minor_ops,
5585#endif
5586};
5587
92e1d5be 5588static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5589 .permission = nfs_permission,
5590 .getattr = nfs_getattr,
5591 .setattr = nfs_setattr,
64c2ce8b
AK		 5592 .getxattr = generic_getxattr,
5593 .setxattr = generic_setxattr,
5594 .listxattr = generic_listxattr,
5595 .removexattr = generic_removexattr,
6b3b5496
BF		 5596};
5597
509de811 5598const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5599 .version = 4, /* protocol version */
5600 .dentry_ops = &nfs4_dentry_operations,
5601 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5602 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5603 .getroot = nfs4_proc_get_root,
5604 .getattr = nfs4_proc_getattr,
5605 .setattr = nfs4_proc_setattr,
2b3de441 5606 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5607 .lookup = nfs4_proc_lookup,
5608 .access = nfs4_proc_access,
5609 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5610 .create = nfs4_proc_create,
5611 .remove = nfs4_proc_remove,
5612 .unlink_setup = nfs4_proc_unlink_setup,
5613 .unlink_done = nfs4_proc_unlink_done,
5614 .rename = nfs4_proc_rename,
d3d4152a
JL		 5615 .rename_setup = nfs4_proc_rename_setup,
5616 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5617 .link = nfs4_proc_link,
5618 .symlink = nfs4_proc_symlink,
5619 .mkdir = nfs4_proc_mkdir,
5620 .rmdir = nfs4_proc_remove,
5621 .readdir = nfs4_proc_readdir,
5622 .mknod = nfs4_proc_mknod,
5623 .statfs = nfs4_proc_statfs,
5624 .fsinfo = nfs4_proc_fsinfo,
5625 .pathconf = nfs4_proc_pathconf,
e9326dca 5626 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5627 .decode_dirent = nfs4_decode_dirent,
5628 .read_setup = nfs4_proc_read_setup,
ec06c096 5629 .read_done = nfs4_read_done,
1da177e4 5630 .write_setup = nfs4_proc_write_setup,
788e7a89 5631 .write_done = nfs4_write_done,
1da177e4 5632 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5633 .commit_done = nfs4_commit_done,
1da177e4 5634 .lock = nfs4_proc_lock,
e50a1c2e 5635 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5636 .close_context = nfs4_close_context,
2b484297 5637 .open_context = nfs4_atomic_open,
1da177e4
LT		 5638};
5639
64c2ce8b
AK		 5640static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5641 .prefix = XATTR_NAME_NFSV4_ACL,
5642 .list = nfs4_xattr_list_nfs4_acl,
5643 .get = nfs4_xattr_get_nfs4_acl,
5644 .set = nfs4_xattr_set_nfs4_acl,
5645};
5646
5647const struct xattr_handler *nfs4_xattr_handlers[] = {
5648 &nfs4_xattr_nfs4_acl_handler,
5649 NULL
5650};
5651
1da177e4
LT		 5652/*
5653 * Local variables:
5654 * c-basic-offset: 8
5655 * End:
5656 */
Linux 6.x block layer and io_uring tree(s)