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NFSv4: Ensure correct locking when accessing the 'lock_states' list
[GitHub/mt8127/android_kernel_alcatel_ttab.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 43#include <linux/sunrpc/clnt.h>
8f70e95f 44#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
9b7160c5 49#include <linux/nfs_mount.h>
1da177e4 50#include <linux/namei.h>
02a913a7 51#include <linux/mount.h>
99fe60d0 52#include <linux/module.h>
5a0ffe54 53#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
1da177e4 56
4ce79717 57#include "nfs4_fs.h"
1da177e4 58#include "delegation.h"
101070ca 59#include "internal.h"
006ea73e 60#include "iostat.h"
fc931582 61#include "callback.h"
b1f69b75 62#include "pnfs.h"
1da177e4
LT		 63
64#define NFSDBG_FACILITY NFSDBG_PROC
65
2066fe89 66#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 67#define NFS4_POLL_RETRY_MAX (15*HZ)
68
a78cb57a
TM		 69#define NFS4_MAX_LOOP_ON_RECOVER (10)
70
cdd4e68b 71struct nfs4_opendata;
864472e9 72static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 73static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 74static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 75static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d 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);
f062eb6c
BS		 80#ifdef CONFIG_NFS_V4_1
81static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
82static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
83#endif
1da177e4 84/* Prevent leaks of NFSv4 errors into userland */
46f72f57 85static int nfs4_map_errors(int err)
1da177e4 86{
52567b03
TM		 87 if (err >= -1000)
88 return err;
89 switch (err) {
90 case -NFS4ERR_RESOURCE:
91 return -EREMOTEIO;
7ebb9315
BS		 92 case -NFS4ERR_WRONGSEC:
93 return -EPERM;
3ddeb7c5
TM		 94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
96 return -EINVAL;
52567b03 97 default:
1da177e4 98 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 99 __func__, -err);
52567b03 100 break;
1da177e4 101 }
52567b03 102 return -EIO;
1da177e4
LT		 103}
104
105/*
106 * This is our standard bitmap for GETATTR requests.
107 */
108const u32 nfs4_fattr_bitmap[2] = {
109 FATTR4_WORD0_TYPE
110 | FATTR4_WORD0_CHANGE
111 | FATTR4_WORD0_SIZE
112 | FATTR4_WORD0_FSID
113 | FATTR4_WORD0_FILEID,
114 FATTR4_WORD1_MODE
115 | FATTR4_WORD1_NUMLINKS
116 | FATTR4_WORD1_OWNER
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
123};
124
125const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
132};
133
4ce79717 134const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 135 FATTR4_WORD0_MAXLINK
136 | FATTR4_WORD0_MAXNAME,
137 0
138};
139
dae100c2 140const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
55b6e774 144 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 145 | FATTR4_WORD1_FS_LAYOUT_TYPES,
146 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 147};
148
830b8e33
MN		 149const u32 nfs4_fs_locations_bitmap[2] = {
150 FATTR4_WORD0_TYPE
151 | FATTR4_WORD0_CHANGE
152 | FATTR4_WORD0_SIZE
153 | FATTR4_WORD0_FSID
154 | FATTR4_WORD0_FILEID
155 | FATTR4_WORD0_FS_LOCATIONS,
156 FATTR4_WORD1_MODE
157 | FATTR4_WORD1_NUMLINKS
158 | FATTR4_WORD1_OWNER
159 | FATTR4_WORD1_OWNER_GROUP
160 | FATTR4_WORD1_RAWDEV
161 | FATTR4_WORD1_SPACE_USED
162 | FATTR4_WORD1_TIME_ACCESS
163 | FATTR4_WORD1_TIME_METADATA
164 | FATTR4_WORD1_TIME_MODIFY
165 | FATTR4_WORD1_MOUNTED_ON_FILEID
166};
167
bc4785cd 168static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 169 struct nfs4_readdir_arg *readdir)
170{
0dbb4c67 171 __be32 *start, *p;
1da177e4
LT		 172
173 BUG_ON(readdir->count < 80);
174 if (cookie > 2) {
b7ef1956 175 readdir->cookie = cookie;
1da177e4
LT		 176 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
177 return;
178 }
179
180 readdir->cookie = 0;
181 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
182 if (cookie == 2)
183 return;
184
185 /*
186 * NFSv4 servers do not return entries for '.' and '..'
187 * Therefore, we fake these entries here. We let '.'
188 * have cookie 0 and '..' have cookie 1. Note that
189 * when talking to the server, we always send cookie 0
190 * instead of 1 or 2.
191 */
0dbb4c67 192 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 193
194 if (cookie == 0) {
195 *p++ = xdr_one; /* next */
196 *p++ = xdr_zero; /* cookie, first word */
197 *p++ = xdr_one; /* cookie, second word */
198 *p++ = xdr_one; /* entry len */
199 memcpy(p, ".\0\0\0", 4); /* entry */
200 p++;
201 *p++ = xdr_one; /* bitmap length */
202 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
203 *p++ = htonl(8); /* attribute buffer length */
4e769b93 204 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 205 }
206
207 *p++ = xdr_one; /* next */
208 *p++ = xdr_zero; /* cookie, first word */
209 *p++ = xdr_two; /* cookie, second word */
210 *p++ = xdr_two; /* entry len */
211 memcpy(p, "..\0\0", 4); /* entry */
212 p++;
213 *p++ = xdr_one; /* bitmap length */
214 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
215 *p++ = htonl(8); /* attribute buffer length */
4e769b93 216 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 217
218 readdir->pgbase = (char *)p - (char *)start;
219 readdir->count -= readdir->pgbase;
220 kunmap_atomic(start, KM_USER0);
221}
222
65de872e
TM		 223static int nfs4_wait_clnt_recover(struct nfs_client *clp)
224{
225 int res;
226
227 might_sleep();
228
e005e804 229 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 230 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 231 return res;
232}
233
234static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
235{
236 int res = 0;
237
238 might_sleep();
239
240 if (*timeout <= 0)
241 *timeout = NFS4_POLL_RETRY_MIN;
242 if (*timeout > NFS4_POLL_RETRY_MAX)
243 *timeout = NFS4_POLL_RETRY_MAX;
244 schedule_timeout_killable(*timeout);
245 if (fatal_signal_pending(current))
246 res = -ERESTARTSYS;
247 *timeout <<= 1;
248 return res;
249}
250
251/* This is the error handling routine for processes that are allowed
252 * to sleep.
253 */
b064eca2 254static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 255{
256 struct nfs_client *clp = server->nfs_client;
9e33bed5 257 struct nfs4_state *state = exception->state;
65de872e
TM		 258 int ret = errorcode;
259
260 exception->retry = 0;
261 switch(errorcode) {
262 case 0:
263 return 0;
9e33bed5
TM		 264 case -NFS4ERR_ADMIN_REVOKED:
265 case -NFS4ERR_BAD_STATEID:
266 case -NFS4ERR_OPENMODE:
267 if (state == NULL)
268 break;
0400a6b0
TM		 269 nfs4_schedule_stateid_recovery(server, state);
270 goto wait_on_recovery;
0ced63d1
TM		 271 case -NFS4ERR_EXPIRED:
272 if (state != NULL)
273 nfs4_schedule_stateid_recovery(server, state);
65de872e 274 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 275 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 276 nfs4_schedule_lease_recovery(clp);
277 goto wait_on_recovery;
03391693 278#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 279 case -NFS4ERR_BADSESSION:
280 case -NFS4ERR_BADSLOT:
281 case -NFS4ERR_BAD_HIGH_SLOT:
282 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
283 case -NFS4ERR_DEADSESSION:
284 case -NFS4ERR_SEQ_FALSE_RETRY:
285 case -NFS4ERR_SEQ_MISORDERED:
286 dprintk("%s ERROR: %d Reset session\n", __func__,
287 errorcode);
0400a6b0 288 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 289 exception->retry = 1;
b9179237 290 break;
03391693 291#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 292 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 293 if (exception->timeout > HZ) {
294 /* We have retried a decent amount, time to
295 * fail
296 */
297 ret = -EBUSY;
298 break;
299 }
65de872e
TM		 300 case -NFS4ERR_GRACE:
301 case -NFS4ERR_DELAY:
2c643488 302 case -EKEYEXPIRED:
65de872e
TM		 303 ret = nfs4_delay(server->client, &exception->timeout);
304 if (ret != 0)
305 break;
a8a4ae3a 306 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 307 case -NFS4ERR_OLD_STATEID:
308 exception->retry = 1;
b064eca2
TM		 309 break;
310 case -NFS4ERR_BADOWNER:
311 /* The following works around a Linux server bug! */
312 case -NFS4ERR_BADNAME:
313 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
314 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
315 exception->retry = 1;
316 printk(KERN_WARNING "NFS: v4 server %s "
317 "does not accept raw "
318 "uid/gids. "
319 "Reenabling the idmapper.\n",
320 server->nfs_client->cl_hostname);
321 }
65de872e
TM		 322 }
323 /* We failed to handle the error */
324 return nfs4_map_errors(ret);
0400a6b0 325wait_on_recovery:
a2c0b9e2
TM		 326 ret = nfs4_wait_clnt_recover(clp);
327 if (ret == 0)
328 exception->retry = 1;
329 return ret;
65de872e
TM		 330}
331
332
452e9352 333static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 334{
1da177e4
LT		 335 spin_lock(&clp->cl_lock);
336 if (time_before(clp->cl_last_renewal,timestamp))
337 clp->cl_last_renewal = timestamp;
338 spin_unlock(&clp->cl_lock);
339}
340
452e9352
TM		 341static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
342{
343 do_renew_lease(server->nfs_client, timestamp);
344}
345
cccef3b9
AA		 346#if defined(CONFIG_NFS_V4_1)
347
e2c4ab3c
AA		 348/*
349 * nfs4_free_slot - free a slot and efficiently update slot table.
350 *
351 * freeing a slot is trivially done by clearing its respective bit
352 * in the bitmap.
353 * If the freed slotid equals highest_used_slotid we want to update it
354 * so that the server would be able to size down the slot table if needed,
355 * otherwise we know that the highest_used_slotid is still in use.
356 * When updating highest_used_slotid there may be "holes" in the bitmap
357 * so we need to scan down from highest_used_slotid to 0 looking for the now
358 * highest slotid in use.
359 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 360 *
361 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 362 */
363static void
dfb4f309 364nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 365{
dfb4f309 366 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 367 int slotid = free_slotid;
368
dfb4f309 369 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 370 /* clear used bit in bitmap */
371 __clear_bit(slotid, tbl->used_slots);
372
373 /* update highest_used_slotid when it is freed */
374 if (slotid == tbl->highest_used_slotid) {
375 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 376 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 377 tbl->highest_used_slotid = slotid;
378 else
379 tbl->highest_used_slotid = -1;
380 }
e2c4ab3c
AA		 381 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
382 free_slotid, tbl->highest_used_slotid);
383}
384
3bfb0fc5 385/*
42acd021 386 * Signal state manager thread if session fore channel is drained
3bfb0fc5 387 */
42acd021 388static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 389{
689cf5c1
AB		 390 struct rpc_task *task;
391
a2118c33 392 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 393 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
394 if (task)
395 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 396 return;
397 }
398
399 if (ses->fc_slot_table.highest_used_slotid != -1)
400 return;
401
42acd021
AA		 402 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
403 complete(&ses->fc_slot_table.complete);
404}
405
406/*
407 * Signal state manager thread if session back channel is drained
408 */
409void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
410{
411 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
412 ses->bc_slot_table.highest_used_slotid != -1)
413 return;
414 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
415 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 416}
417
d185a334 418static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 419{
420 struct nfs4_slot_table *tbl;
421
d185a334 422 tbl = &res->sr_session->fc_slot_table;
dfb4f309 423 if (!res->sr_slot) {
13615871
AA		 424 /* just wake up the next guy waiting since
425 * we may have not consumed a slot after all */
691daf3b 426 dprintk("%s: No slot\n", __func__);
35dc1d74 427 return;
13615871 428 }
ea028ac9 429
35dc1d74 430 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 431 nfs4_free_slot(tbl, res->sr_slot);
42acd021 432 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 433 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 434 res->sr_slot = NULL;
13615871
AA		 435}
436
14516c3a 437static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 438{
439 unsigned long timestamp;
14516c3a 440 struct nfs_client *clp;
b0df806c
AA		 441
442 /*
443 * sr_status remains 1 if an RPC level error occurred. The server
444 * may or may not have processed the sequence operation..
445 * Proceed as if the server received and processed the sequence
446 * operation.
447 */
448 if (res->sr_status == 1)
449 res->sr_status = NFS_OK;
450
468f8613
BS		 451 /* don't increment the sequence number if the task wasn't sent */
452 if (!RPC_WAS_SENT(task))
b0df806c
AA		 453 goto out;
454
691daf3b 455 /* Check the SEQUENCE operation status */
14516c3a
TM		 456 switch (res->sr_status) {
457 case 0:
b0df806c 458 /* Update the slot's sequence and clientid lease timer */
dfb4f309 459 ++res->sr_slot->seq_nr;
b0df806c 460 timestamp = res->sr_renewal_time;
14516c3a 461 clp = res->sr_session->clp;
452e9352 462 do_renew_lease(clp, timestamp);
0629e370 463 /* Check sequence flags */
b4410c2f
TM		 464 if (res->sr_status_flags != 0)
465 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 466 break;
467 case -NFS4ERR_DELAY:
468 /* The server detected a resend of the RPC call and
469 * returned NFS4ERR_DELAY as per Section 2.10.6.2
470 * of RFC5661.
471 */
12364a4f 472 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 473 __func__,
474 res->sr_slot - res->sr_session->fc_slot_table.slots,
475 res->sr_slot->seq_nr);
14516c3a
TM		 476 goto out_retry;
477 default:
478 /* Just update the slot sequence no. */
dfb4f309 479 ++res->sr_slot->seq_nr;
b0df806c
AA		 480 }
481out:
482 /* The session may be reset by one of the error handlers. */
483 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 484 nfs41_sequence_free_slot(res);
14516c3a
TM		 485 return 1;
486out_retry:
d05dd4e9 487 if (!rpc_restart_call(task))
14516c3a
TM		 488 goto out;
489 rpc_delay(task, NFS4_POLL_RETRY_MAX);
490 return 0;
b0df806c
AA		 491}
492
14516c3a
TM		 493static int nfs4_sequence_done(struct rpc_task *task,
494 struct nfs4_sequence_res *res)
df896455 495{
14516c3a
TM		 496 if (res->sr_session == NULL)
497 return 1;
498 return nfs41_sequence_done(task, res);
df896455
TM		 499}
500
510b8175
BH		 501/*
502 * nfs4_find_slot - efficiently look for a free slot
503 *
504 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
505 * If found, we mark the slot as used, update the highest_used_slotid,
506 * and respectively set up the sequence operation args.
507 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 508 *
509 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 510 */
511static u8
40ead580 512nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 513{
514 int slotid;
515 u8 ret_id = NFS4_MAX_SLOT_TABLE;
516 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
517
510b8175
BH		 518 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
519 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
520 tbl->max_slots);
521 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
522 if (slotid >= tbl->max_slots)
523 goto out;
524 __set_bit(slotid, tbl->used_slots);
525 if (slotid > tbl->highest_used_slotid)
526 tbl->highest_used_slotid = slotid;
527 ret_id = slotid;
528out:
529 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
530 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 531 return ret_id;
532}
533
dc70d7b3 534int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 535 struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res,
537 int cache_reply,
538 struct rpc_task *task)
539{
fbcd4abc
AA		 540 struct nfs4_slot *slot;
541 struct nfs4_slot_table *tbl;
542 u8 slotid;
543
544 dprintk("--> %s\n", __func__);
ce5039c1 545 /* slot already allocated? */
dfb4f309 546 if (res->sr_slot != NULL)
ce5039c1
AA		 547 return 0;
548
fbcd4abc
AA		 549 tbl = &session->fc_slot_table;
550
551 spin_lock(&tbl->slot_tbl_lock);
a2118c33 552 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 553 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 554 /*
555 * The state manager will wait until the slot table is empty.
556 * Schedule the reset thread
557 */
05f0d236 558 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 559 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 560 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 561 return -EAGAIN;
b069d94a
AA		 562 }
563
689cf5c1
AB		 564 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
565 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
566 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
567 spin_unlock(&tbl->slot_tbl_lock);
568 dprintk("%s enforce FIFO order\n", __func__);
569 return -EAGAIN;
570 }
571
40ead580 572 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 573 if (slotid == NFS4_MAX_SLOT_TABLE) {
574 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
575 spin_unlock(&tbl->slot_tbl_lock);
576 dprintk("<-- %s: no free slots\n", __func__);
577 return -EAGAIN;
578 }
579 spin_unlock(&tbl->slot_tbl_lock);
580
689cf5c1 581 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 582 slot = tbl->slots + slotid;
99fe60d0 583 args->sa_session = session;
fbcd4abc
AA		 584 args->sa_slotid = slotid;
585 args->sa_cache_this = cache_reply;
586
587 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
588
99fe60d0 589 res->sr_session = session;
dfb4f309 590 res->sr_slot = slot;
fbcd4abc 591 res->sr_renewal_time = jiffies;
2a6e26cd 592 res->sr_status_flags = 0;
fbcd4abc
AA		 593 /*
594 * sr_status is only set in decode_sequence, and so will remain
595 * set to 1 if an rpc level failure occurs.
596 */
597 res->sr_status = 1;
ce5039c1
AA		 598 return 0;
599}
dc70d7b3 600EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 601
035168ab 602int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
605 int cache_reply,
606 struct rpc_task *task)
607{
035168ab 608 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 609 int ret = 0;
610
035168ab
TM		 611 if (session == NULL) {
612 args->sa_session = NULL;
613 res->sr_session = NULL;
614 goto out;
615 }
616
12364a4f 617 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 618 __func__, session->clp, session, res->sr_slot ?
619 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 620
035168ab 621 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 622 task);
ce5039c1
AA		 623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
035168ab 629 const struct nfs_server *seq_server;
ce5039c1
AA		 630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
632 int cache_reply;
633};
634
635static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
636{
637 struct nfs41_call_sync_data *data = calldata;
638
035168ab
TM		 639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
641 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 642 data->seq_res, data->cache_reply, task))
643 return;
644 rpc_call_start(task);
645}
646
b257957e
AB		 647static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
648{
649 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
650 nfs41_call_sync_prepare(task, calldata);
651}
652
69ab40c4
AA		 653static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
654{
655 struct nfs41_call_sync_data *data = calldata;
656
14516c3a 657 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 658}
659
ce5039c1
AA		 660struct rpc_call_ops nfs41_call_sync_ops = {
661 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 662 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 663};
664
b257957e
AB		 665struct rpc_call_ops nfs41_call_priv_sync_ops = {
666 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
667 .rpc_call_done = nfs41_call_sync_done,
668};
669
7c513058
BS		 670static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
671 struct nfs_server *server,
ce5039c1
AA		 672 struct rpc_message *msg,
673 struct nfs4_sequence_args *args,
674 struct nfs4_sequence_res *res,
b257957e
AB		 675 int cache_reply,
676 int privileged)
ce5039c1
AA		 677{
678 int ret;
679 struct rpc_task *task;
680 struct nfs41_call_sync_data data = {
035168ab 681 .seq_server = server,
ce5039c1
AA		 682 .seq_args = args,
683 .seq_res = res,
684 .cache_reply = cache_reply,
685 };
686 struct rpc_task_setup task_setup = {
7c513058 687 .rpc_client = clnt,
ce5039c1
AA		 688 .rpc_message = msg,
689 .callback_ops = &nfs41_call_sync_ops,
690 .callback_data = &data
691 };
692
dfb4f309 693 res->sr_slot = NULL;
b257957e
AB		 694 if (privileged)
695 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 696 task = rpc_run_task(&task_setup);
697 if (IS_ERR(task))
698 ret = PTR_ERR(task);
699 else {
700 ret = task->tk_status;
701 rpc_put_task(task);
702 }
703 return ret;
704}
705
7c513058
BS		 706int _nfs4_call_sync_session(struct rpc_clnt *clnt,
707 struct nfs_server *server,
cccef3b9
AA		 708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
710 struct nfs4_sequence_res *res,
711 int cache_reply)
712{
7c513058 713 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 714}
715
df896455 716#else
14516c3a
TM		 717static int nfs4_sequence_done(struct rpc_task *task,
718 struct nfs4_sequence_res *res)
df896455 719{
14516c3a 720 return 1;
df896455 721}
cccef3b9
AA		 722#endif /* CONFIG_NFS_V4_1 */
723
7c513058
BS		 724int _nfs4_call_sync(struct rpc_clnt *clnt,
725 struct nfs_server *server,
cccef3b9
AA		 726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
729 int cache_reply)
730{
f3752975 731 args->sa_session = res->sr_session = NULL;
7c513058 732 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 733}
734
e73b83f2 735static inline
7c513058
BS		 736int nfs4_call_sync(struct rpc_clnt *clnt,
737 struct nfs_server *server,
e73b83f2
BS		 738 struct rpc_message *msg,
739 struct nfs4_sequence_args *args,
740 struct nfs4_sequence_res *res,
741 int cache_reply)
742{
7c513058
BS		 743 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
744 args, res, cache_reply);
e73b83f2 745}
cccef3b9 746
38478b24 747static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 748{
38478b24 749 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 750
38478b24 751 spin_lock(&dir->i_lock);
40d24704 752 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
a9a4a87a 753 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 754 nfs_force_lookup_revalidate(dir);
a9a4a87a 755 dir->i_version = cinfo->after;
38478b24 756 spin_unlock(&dir->i_lock);
1da177e4
LT		 757}
758
e56e0b78 759struct nfs4_opendata {
c6d00e63 760 struct kref kref;
e56e0b78
TM		 761 struct nfs_openargs o_arg;
762 struct nfs_openres o_res;
cdd4e68b
TM		 763 struct nfs_open_confirmargs c_arg;
764 struct nfs_open_confirmres c_res;
e56e0b78
TM		 765 struct nfs_fattr f_attr;
766 struct nfs_fattr dir_attr;
e56e0b78 767 struct dentry *dir;
82a2c1b7 768 struct dentry *dentry;
e56e0b78 769 struct nfs4_state_owner *owner;
aac00a8d 770 struct nfs4_state *state;
e56e0b78 771 struct iattr attrs;
26e976a8 772 unsigned long timestamp;
3e309914 773 unsigned int rpc_done : 1;
24ac23ab
TM		 774 int rpc_status;
775 int cancelled;
e56e0b78
TM		 776};
777
2ced46c2
TM		 778
779static void nfs4_init_opendata_res(struct nfs4_opendata *p)
780{
781 p->o_res.f_attr = &p->f_attr;
782 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 783 p->o_res.seqid = p->o_arg.seqid;
784 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 785 p->o_res.server = p->o_arg.server;
786 nfs_fattr_init(&p->f_attr);
787 nfs_fattr_init(&p->dir_attr);
788}
789
82a2c1b7 790static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 791 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 792 const struct iattr *attrs,
793 gfp_t gfp_mask)
e56e0b78 794{
82a2c1b7 795 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 796 struct inode *dir = parent->d_inode;
797 struct nfs_server *server = NFS_SERVER(dir);
798 struct nfs4_opendata *p;
799
8535b2be 800 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 801 if (p == NULL)
802 goto err;
8535b2be 803 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 804 if (p->o_arg.seqid == NULL)
805 goto err_free;
82a2c1b7
AV		 806 nfs_sb_active(dentry->d_sb);
807 p->dentry = dget(dentry);
e56e0b78
TM		 808 p->dir = parent;
809 p->owner = sp;
810 atomic_inc(&sp->so_count);
811 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 812 p->o_arg.open_flags = flags;
813 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 814 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 815 p->o_arg.id = sp->so_owner_id.id;
82a2c1b7 816 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 817 p->o_arg.server = server;
818 p->o_arg.bitmask = server->attr_bitmask;
819 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 820 if (flags & O_CREAT) {
821 u32 *s;
822
e56e0b78
TM		 823 p->o_arg.u.attrs = &p->attrs;
824 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 825 s = (u32 *) p->o_arg.u.verifier.data;
826 s[0] = jiffies;
827 s[1] = current->pid;
e56e0b78 828 }
cdd4e68b
TM		 829 p->c_arg.fh = &p->o_res.fh;
830 p->c_arg.stateid = &p->o_res.stateid;
831 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 832 nfs4_init_opendata_res(p);
c6d00e63 833 kref_init(&p->kref);
e56e0b78
TM		 834 return p;
835err_free:
836 kfree(p);
837err:
838 dput(parent);
839 return NULL;
840}
841
c6d00e63 842static void nfs4_opendata_free(struct kref *kref)
e56e0b78 843{
c6d00e63
TM		 844 struct nfs4_opendata *p = container_of(kref,
845 struct nfs4_opendata, kref);
82a2c1b7 846 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 847
848 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 849 if (p->state != NULL)
850 nfs4_put_open_state(p->state);
c6d00e63
TM		 851 nfs4_put_state_owner(p->owner);
852 dput(p->dir);
82a2c1b7
AV		 853 dput(p->dentry);
854 nfs_sb_deactive(sb);
c6d00e63
TM		 855 kfree(p);
856}
857
858static void nfs4_opendata_put(struct nfs4_opendata *p)
859{
860 if (p != NULL)
861 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 862}
863
06f814a3
TM		 864static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
865{
06f814a3
TM		 866 int ret;
867
06f814a3 868 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 869 return ret;
870}
871
dc0b027d 872static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 873{
874 int ret = 0;
dc0b027d
TM		 875
876 if (open_mode & O_EXCL)
877 goto out;
878 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 879 case FMODE_READ:
88069f77
TM		 880 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
881 && state->n_rdonly != 0;
6ee41268
TM		 882 break;
883 case FMODE_WRITE:
88069f77
TM		 884 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
885 && state->n_wronly != 0;
6ee41268
TM		 886 break;
887 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 888 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
889 && state->n_rdwr != 0;
6ee41268 890 }
dc0b027d 891out:
6ee41268
TM		 892 return ret;
893}
894
dc0b027d 895static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 896{
dc0b027d 897 if ((delegation->type & fmode) != fmode)
aac00a8d 898 return 0;
15c831bf 899 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 900 return 0;
b7391f44 901 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 902 return 1;
903}
904
dc0b027d 905static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 906{
dc0b027d 907 switch (fmode) {
e7616923
TM		 908 case FMODE_WRITE:
909 state->n_wronly++;
910 break;
911 case FMODE_READ:
912 state->n_rdonly++;
913 break;
914 case FMODE_READ|FMODE_WRITE:
915 state->n_rdwr++;
916 }
dc0b027d 917 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 918}
919
dc0b027d 920static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 921{
922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
923 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
924 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 925 switch (fmode) {
003707c7
TM		 926 case FMODE_READ:
927 set_bit(NFS_O_RDONLY_STATE, &state->flags);
928 break;
929 case FMODE_WRITE:
930 set_bit(NFS_O_WRONLY_STATE, &state->flags);
931 break;
932 case FMODE_READ|FMODE_WRITE:
933 set_bit(NFS_O_RDWR_STATE, &state->flags);
934 }
e7616923
TM		 935}
936
dc0b027d 937static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 938{
8bda4e4c 939 write_seqlock(&state->seqlock);
dc0b027d 940 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 941 write_sequnlock(&state->seqlock);
003707c7
TM		 942}
943
dc0b027d 944static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 945{
8bda4e4c
TM		 946 /*
947 * Protect the call to nfs4_state_set_mode_locked and
948 * serialise the stateid update
949 */
950 write_seqlock(&state->seqlock);
003707c7
TM		 951 if (deleg_stateid != NULL) {
952 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
953 set_bit(NFS_DELEGATED_STATE, &state->flags);
954 }
955 if (open_stateid != NULL)
dc0b027d 956 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 957 write_sequnlock(&state->seqlock);
958 spin_lock(&state->owner->so_lock);
dc0b027d 959 update_open_stateflags(state, fmode);
ec073428 960 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 961}
962
dc0b027d 963static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 964{
965 struct nfs_inode *nfsi = NFS_I(state->inode);
966 struct nfs_delegation *deleg_cur;
967 int ret = 0;
968
dc0b027d 969 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 970
971 rcu_read_lock();
972 deleg_cur = rcu_dereference(nfsi->delegation);
973 if (deleg_cur == NULL)
974 goto no_delegation;
975
976 spin_lock(&deleg_cur->lock);
977 if (nfsi->delegation != deleg_cur ||
dc0b027d 978 (deleg_cur->type & fmode) != fmode)
34310430
TM		 979 goto no_delegation_unlock;
980
981 if (delegation == NULL)
982 delegation = &deleg_cur->stateid;
983 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
984 goto no_delegation_unlock;
985
b7391f44 986 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 987 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 988 ret = 1;
989no_delegation_unlock:
990 spin_unlock(&deleg_cur->lock);
991no_delegation:
992 rcu_read_unlock();
993
994 if (!ret && open_stateid != NULL) {
dc0b027d 995 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 996 ret = 1;
997 }
998
999 return ret;
1000}
1001
1002
dc0b027d 1003static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1004{
1005 struct nfs_delegation *delegation;
1006
1007 rcu_read_lock();
1008 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1009 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1010 rcu_read_unlock();
1011 return;
1012 }
1013 rcu_read_unlock();
1014 nfs_inode_return_delegation(inode);
1015}
1016
6ee41268 1017static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1018{
1019 struct nfs4_state *state = opendata->state;
1020 struct nfs_inode *nfsi = NFS_I(state->inode);
1021 struct nfs_delegation *delegation;
dc0b027d
TM		 1022 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1023 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1024 nfs4_stateid stateid;
1025 int ret = -EAGAIN;
1026
aac00a8d 1027 for (;;) {
dc0b027d 1028 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1029 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1030 if (can_open_cached(state, fmode, open_mode)) {
1031 update_open_stateflags(state, fmode);
6ee41268 1032 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1033 goto out_return_state;
1034 }
1035 spin_unlock(&state->owner->so_lock);
1036 }
34310430
TM		 1037 rcu_read_lock();
1038 delegation = rcu_dereference(nfsi->delegation);
1039 if (delegation == NULL ||
dc0b027d 1040 !can_open_delegated(delegation, fmode)) {
34310430 1041 rcu_read_unlock();
aac00a8d 1042 break;
34310430 1043 }
aac00a8d
TM		 1044 /* Save the delegation */
1045 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1046 rcu_read_unlock();
af22f94a 1047 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1048 if (ret != 0)
1049 goto out;
1050 ret = -EAGAIN;
34310430
TM		 1051
1052 /* Try to update the stateid using the delegation */
dc0b027d 1053 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1054 goto out_return_state;
aac00a8d 1055 }
aac00a8d
TM		 1056out:
1057 return ERR_PTR(ret);
1058out_return_state:
1059 atomic_inc(&state->count);
1060 return state;
1061}
1062
24ac23ab
TM		 1063static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1064{
1065 struct inode *inode;
1066 struct nfs4_state *state = NULL;
003707c7 1067 struct nfs_delegation *delegation;
1b370bc2 1068 int ret;
24ac23ab 1069
aac00a8d 1070 if (!data->rpc_done) {
6ee41268 1071 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1072 goto out;
1073 }
1074
1b370bc2 1075 ret = -EAGAIN;
24ac23ab 1076 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1077 goto err;
24ac23ab 1078 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1079 ret = PTR_ERR(inode);
03f28e3a 1080 if (IS_ERR(inode))
1b370bc2
TM		 1081 goto err;
1082 ret = -ENOMEM;
24ac23ab
TM		 1083 state = nfs4_get_open_state(inode, data->owner);
1084 if (state == NULL)
1b370bc2 1085 goto err_put_inode;
549d6ed5 1086 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1087 int delegation_flags = 0;
1088
003707c7
TM		 1089 rcu_read_lock();
1090 delegation = rcu_dereference(NFS_I(inode)->delegation);
1091 if (delegation)
1092 delegation_flags = delegation->flags;
1093 rcu_read_unlock();
15c831bf 1094 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1095 nfs_inode_set_delegation(state->inode,
1096 data->owner->so_cred,
1097 &data->o_res);
1098 else
1099 nfs_inode_reclaim_delegation(state->inode,
1100 data->owner->so_cred,
1101 &data->o_res);
1102 }
34310430
TM		 1103
1104 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1105 data->o_arg.fmode);
24ac23ab 1106 iput(inode);
aac00a8d 1107out:
24ac23ab 1108 return state;
1b370bc2
TM		 1109err_put_inode:
1110 iput(inode);
1111err:
1112 return ERR_PTR(ret);
24ac23ab
TM		 1113}
1114
864472e9
TM		 1115static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1116{
1117 struct nfs_inode *nfsi = NFS_I(state->inode);
1118 struct nfs_open_context *ctx;
1119
1120 spin_lock(&state->inode->i_lock);
1121 list_for_each_entry(ctx, &nfsi->open_files, list) {
1122 if (ctx->state != state)
1123 continue;
1124 get_nfs_open_context(ctx);
1125 spin_unlock(&state->inode->i_lock);
1126 return ctx;
1127 }
1128 spin_unlock(&state->inode->i_lock);
1129 return ERR_PTR(-ENOENT);
1130}
1131
6f220ed5
TM		 1132static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1133{
1134 struct nfs4_opendata *opendata;
1135
3d4ff43d 1136 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1137 if (opendata == NULL)
1138 return ERR_PTR(-ENOMEM);
1139 opendata->state = state;
1140 atomic_inc(&state->count);
1141 return opendata;
1142}
1143
dc0b027d 1144static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1145{
2ced46c2 1146 struct nfs4_state *newstate;
864472e9
TM		 1147 int ret;
1148
dc0b027d
TM		 1149 opendata->o_arg.open_flags = 0;
1150 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1151 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1152 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1153 nfs4_init_opendata_res(opendata);
b257957e 1154 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1155 if (ret != 0)
1156 return ret;
2ced46c2 1157 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1158 if (IS_ERR(newstate))
1159 return PTR_ERR(newstate);
643168c2 1160 nfs4_close_state(newstate, fmode);
2ced46c2 1161 *res = newstate;
864472e9
TM		 1162 return 0;
1163}
1164
1165static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1166{
864472e9 1167 struct nfs4_state *newstate;
864472e9
TM		 1168 int ret;
1169
1170 /* memory barrier prior to reading state->n_* */
2ced46c2 1171 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1172 smp_rmb();
1173 if (state->n_rdwr != 0) {
b0ed9dbc 1174 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1175 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1176 if (ret != 0)
1177 return ret;
2ced46c2
TM		 1178 if (newstate != state)
1179 return -ESTALE;
864472e9
TM		 1180 }
1181 if (state->n_wronly != 0) {
b0ed9dbc 1182 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1183 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1184 if (ret != 0)
1185 return ret;
2ced46c2
TM		 1186 if (newstate != state)
1187 return -ESTALE;
864472e9
TM		 1188 }
1189 if (state->n_rdonly != 0) {
b0ed9dbc 1190 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1191 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1192 if (ret != 0)
1193 return ret;
2ced46c2
TM		 1194 if (newstate != state)
1195 return -ESTALE;
864472e9 1196 }
1ac7e2fd
TM		 1197 /*
1198 * We may have performed cached opens for all three recoveries.
1199 * Check if we need to update the current stateid.
1200 */
1201 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1202 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1203 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1205 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1206 write_sequnlock(&state->seqlock);
1ac7e2fd 1207 }
864472e9
TM		 1208 return 0;
1209}
1210
1da177e4
LT		 1211/*
1212 * OPEN_RECLAIM:
1213 * reclaim state on the server after a reboot.
1da177e4 1214 */
539cd03a 1215static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1216{
1ac7e2fd 1217 struct nfs_delegation *delegation;
864472e9 1218 struct nfs4_opendata *opendata;
dc0b027d 1219 fmode_t delegation_type = 0;
1da177e4
LT		 1220 int status;
1221
6f220ed5
TM		 1222 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1223 if (IS_ERR(opendata))
1224 return PTR_ERR(opendata);
864472e9
TM		 1225 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1226 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1227 rcu_read_lock();
1228 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1229 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1230 delegation_type = delegation->type;
1ac7e2fd 1231 rcu_read_unlock();
864472e9
TM		 1232 opendata->o_arg.u.delegation_type = delegation_type;
1233 status = nfs4_open_recover(opendata, state);
c6d00e63 1234 nfs4_opendata_put(opendata);
1da177e4
LT		 1235 return status;
1236}
1237
539cd03a 1238static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1239{
1240 struct nfs_server *server = NFS_SERVER(state->inode);
1241 struct nfs4_exception exception = { };
1242 int err;
1243 do {
539cd03a 1244 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1245 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1246 break;
1247 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1248 } while (exception.retry);
1249 return err;
1250}
1251
864472e9
TM		 1252static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1253{
1254 struct nfs_open_context *ctx;
1255 int ret;
1256
1257 ctx = nfs4_state_find_open_context(state);
1258 if (IS_ERR(ctx))
1259 return PTR_ERR(ctx);
539cd03a 1260 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1261 put_nfs_open_context(ctx);
1262 return ret;
1263}
1264
13437e12 1265static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1266{
e56e0b78 1267 struct nfs4_opendata *opendata;
864472e9 1268 int ret;
1da177e4 1269
6f220ed5
TM		 1270 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1271 if (IS_ERR(opendata))
1272 return PTR_ERR(opendata);
e56e0b78 1273 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1274 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1275 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1276 ret = nfs4_open_recover(opendata, state);
c6d00e63 1277 nfs4_opendata_put(opendata);
864472e9 1278 return ret;
1da177e4
LT		 1279}
1280
13437e12 1281int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1282{
1283 struct nfs4_exception exception = { };
539cd03a 1284 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1285 int err;
1286 do {
13437e12 1287 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1288 switch (err) {
1289 case 0:
965b5d67
TM		 1290 case -ENOENT:
1291 case -ESTALE:
1292 goto out;
bcfa49f6
RL		 1293 case -NFS4ERR_BADSESSION:
1294 case -NFS4ERR_BADSLOT:
1295 case -NFS4ERR_BAD_HIGH_SLOT:
1296 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1297 case -NFS4ERR_DEADSESSION:
0400a6b0 1298 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1299 goto out;
1da177e4
LT		 1300 case -NFS4ERR_STALE_CLIENTID:
1301 case -NFS4ERR_STALE_STATEID:
1302 case -NFS4ERR_EXPIRED:
1303 /* Don't recall a delegation if it was lost */
0400a6b0 1304 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1305 goto out;
1306 case -ERESTARTSYS:
1307 /*
1308 * The show must go on: exit, but mark the
1309 * stateid as needing recovery.
1310 */
1311 case -NFS4ERR_ADMIN_REVOKED:
1312 case -NFS4ERR_BAD_STATEID:
0400a6b0 1313 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1314 case -EKEYEXPIRED:
1315 /*
1316 * User RPCSEC_GSS context has expired.
1317 * We cannot recover this stateid now, so
1318 * skip it and allow recovery thread to
1319 * proceed.
1320 */
965b5d67
TM		 1321 case -ENOMEM:
1322 err = 0;
1323 goto out;
1da177e4
LT		 1324 }
1325 err = nfs4_handle_exception(server, err, &exception);
1326 } while (exception.retry);
965b5d67 1327out:
1da177e4
LT		 1328 return err;
1329}
1330
cdd4e68b
TM		 1331static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1332{
1333 struct nfs4_opendata *data = calldata;
1334
1335 data->rpc_status = task->tk_status;
26e976a8 1336 if (data->rpc_status == 0) {
cdd4e68b
TM		 1337 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1338 sizeof(data->o_res.stateid.data));
bb22629e 1339 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1340 renew_lease(data->o_res.server, data->timestamp);
3e309914 1341 data->rpc_done = 1;
26e976a8 1342 }
cdd4e68b
TM		 1343}
1344
1345static void nfs4_open_confirm_release(void *calldata)
1346{
1347 struct nfs4_opendata *data = calldata;
1348 struct nfs4_state *state = NULL;
1349
1350 /* If this request hasn't been cancelled, do nothing */
1351 if (data->cancelled == 0)
1352 goto out_free;
1353 /* In case of error, no cleanup! */
3e309914 1354 if (!data->rpc_done)
cdd4e68b 1355 goto out_free;
cdd4e68b 1356 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1357 if (!IS_ERR(state))
643168c2 1358 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1359out_free:
c6d00e63 1360 nfs4_opendata_put(data);
cdd4e68b
TM		 1361}
1362
1363static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1364 .rpc_call_done = nfs4_open_confirm_done,
1365 .rpc_release = nfs4_open_confirm_release,
1366};
1367
1368/*
1369 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1370 */
1371static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1372{
1373 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1374 struct rpc_task *task;
5138fde0
TM		 1375 struct rpc_message msg = {
1376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1377 .rpc_argp = &data->c_arg,
1378 .rpc_resp = &data->c_res,
1379 .rpc_cred = data->owner->so_cred,
1380 };
c970aa85
TM		 1381 struct rpc_task_setup task_setup_data = {
1382 .rpc_client = server->client,
5138fde0 1383 .rpc_message = &msg,
c970aa85
TM		 1384 .callback_ops = &nfs4_open_confirm_ops,
1385 .callback_data = data,
101070ca 1386 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1387 .flags = RPC_TASK_ASYNC,
1388 };
1da177e4
LT		 1389 int status;
1390
c6d00e63 1391 kref_get(&data->kref);
3e309914
TM		 1392 data->rpc_done = 0;
1393 data->rpc_status = 0;
5138fde0 1394 data->timestamp = jiffies;
c970aa85 1395 task = rpc_run_task(&task_setup_data);
7a1218a2 1396 if (IS_ERR(task))
cdd4e68b 1397 return PTR_ERR(task);
cdd4e68b
TM		 1398 status = nfs4_wait_for_completion_rpc_task(task);
1399 if (status != 0) {
1400 data->cancelled = 1;
1401 smp_wmb();
1402 } else
1403 status = data->rpc_status;
e6b3c4db 1404 rpc_put_task(task);
1da177e4
LT		 1405 return status;
1406}
1407
24ac23ab 1408static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1409{
24ac23ab
TM		 1410 struct nfs4_opendata *data = calldata;
1411 struct nfs4_state_owner *sp = data->owner;
5138fde0 1412
24ac23ab
TM		 1413 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1414 return;
aac00a8d
TM		 1415 /*
1416 * Check if we still need to send an OPEN call, or if we can use
1417 * a delegation instead.
1418 */
1419 if (data->state != NULL) {
1420 struct nfs_delegation *delegation;
1421
dc0b027d 1422 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1423 goto out_no_action;
aac00a8d
TM		 1424 rcu_read_lock();
1425 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1426 if (delegation != NULL &&
15c831bf 1427 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1428 rcu_read_unlock();
6ee41268 1429 goto out_no_action;
aac00a8d
TM		 1430 }
1431 rcu_read_unlock();
1432 }
24ac23ab 1433 /* Update sequence id. */
9f958ab8 1434 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1435 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1436 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1437 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1438 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1439 }
26e976a8 1440 data->timestamp = jiffies;
035168ab 1441 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1442 &data->o_arg.seq_args,
1443 &data->o_res.seq_res, 1, task))
1444 return;
5138fde0 1445 rpc_call_start(task);
6ee41268
TM		 1446 return;
1447out_no_action:
1448 task->tk_action = NULL;
1449
24ac23ab 1450}
1da177e4 1451
b257957e
AB		 1452static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1453{
1454 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1455 nfs4_open_prepare(task, calldata);
1456}
1457
24ac23ab
TM		 1458static void nfs4_open_done(struct rpc_task *task, void *calldata)
1459{
1460 struct nfs4_opendata *data = calldata;
1da177e4 1461
24ac23ab 1462 data->rpc_status = task->tk_status;
d898528c 1463
14516c3a
TM		 1464 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1465 return;
d898528c 1466
24ac23ab
TM		 1467 if (task->tk_status == 0) {
1468 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1469 case S_IFREG:
1470 break;
1471 case S_IFLNK:
24ac23ab 1472 data->rpc_status = -ELOOP;
6f926b5b
TM		 1473 break;
1474 case S_IFDIR:
24ac23ab 1475 data->rpc_status = -EISDIR;
6f926b5b
TM		 1476 break;
1477 default:
24ac23ab 1478 data->rpc_status = -ENOTDIR;
6f926b5b 1479 }
26e976a8 1480 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1481 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1482 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1483 }
3e309914 1484 data->rpc_done = 1;
24ac23ab 1485}
6f926b5b 1486
24ac23ab
TM		 1487static void nfs4_open_release(void *calldata)
1488{
1489 struct nfs4_opendata *data = calldata;
1490 struct nfs4_state *state = NULL;
1491
1492 /* If this request hasn't been cancelled, do nothing */
1493 if (data->cancelled == 0)
1494 goto out_free;
1495 /* In case of error, no cleanup! */
3e309914 1496 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1497 goto out_free;
1498 /* In case we need an open_confirm, no cleanup! */
1499 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1500 goto out_free;
24ac23ab 1501 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1502 if (!IS_ERR(state))
643168c2 1503 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1504out_free:
c6d00e63 1505 nfs4_opendata_put(data);
24ac23ab
TM		 1506}
1507
1508static const struct rpc_call_ops nfs4_open_ops = {
1509 .rpc_call_prepare = nfs4_open_prepare,
1510 .rpc_call_done = nfs4_open_done,
1511 .rpc_release = nfs4_open_release,
1512};
1513
b257957e
AB		 1514static const struct rpc_call_ops nfs4_recover_open_ops = {
1515 .rpc_call_prepare = nfs4_recover_open_prepare,
1516 .rpc_call_done = nfs4_open_done,
1517 .rpc_release = nfs4_open_release,
1518};
1519
1520static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1521{
1522 struct inode *dir = data->dir->d_inode;
1523 struct nfs_server *server = NFS_SERVER(dir);
1524 struct nfs_openargs *o_arg = &data->o_arg;
1525 struct nfs_openres *o_res = &data->o_res;
1526 struct rpc_task *task;
5138fde0
TM		 1527 struct rpc_message msg = {
1528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1529 .rpc_argp = o_arg,
1530 .rpc_resp = o_res,
1531 .rpc_cred = data->owner->so_cred,
1532 };
c970aa85
TM		 1533 struct rpc_task_setup task_setup_data = {
1534 .rpc_client = server->client,
5138fde0 1535 .rpc_message = &msg,
c970aa85
TM		 1536 .callback_ops = &nfs4_open_ops,
1537 .callback_data = data,
101070ca 1538 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1539 .flags = RPC_TASK_ASYNC,
1540 };
24ac23ab
TM		 1541 int status;
1542
c6d00e63 1543 kref_get(&data->kref);
3e309914
TM		 1544 data->rpc_done = 0;
1545 data->rpc_status = 0;
2ced46c2 1546 data->cancelled = 0;
b257957e
AB		 1547 if (isrecover)
1548 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1549 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1550 if (IS_ERR(task))
1551 return PTR_ERR(task);
1552 status = nfs4_wait_for_completion_rpc_task(task);
1553 if (status != 0) {
1554 data->cancelled = 1;
1555 smp_wmb();
1556 } else
1557 status = data->rpc_status;
1558 rpc_put_task(task);
1559
1560 return status;
1561}
1562
1563static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1564{
1565 struct inode *dir = data->dir->d_inode;
1566 struct nfs_openres *o_res = &data->o_res;
1567 int status;
1568
1569 status = nfs4_run_open_task(data, 1);
1570 if (status != 0 || !data->rpc_done)
1571 return status;
1572
1573 nfs_refresh_inode(dir, o_res->dir_attr);
1574
1575 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1576 status = _nfs4_proc_open_confirm(data);
1577 if (status != 0)
1578 return status;
1579 }
1580
1581 return status;
1582}
1583
1584/*
1585 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1586 */
1587static int _nfs4_proc_open(struct nfs4_opendata *data)
1588{
1589 struct inode *dir = data->dir->d_inode;
1590 struct nfs_server *server = NFS_SERVER(dir);
1591 struct nfs_openargs *o_arg = &data->o_arg;
1592 struct nfs_openres *o_res = &data->o_res;
1593 int status;
1594
1595 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1596 if (!data->rpc_done)
1597 return status;
1598 if (status != 0) {
1599 if (status == -NFS4ERR_BADNAME &&
1600 !(o_arg->open_flags & O_CREAT))
1601 return -ENOENT;
24ac23ab 1602 return status;
08ef7bd3 1603 }
24ac23ab 1604
56ae19f3
TM		 1605 if (o_arg->open_flags & O_CREAT) {
1606 update_changeattr(dir, &o_res->cinfo);
1607 nfs_post_op_update_inode(dir, o_res->dir_attr);
1608 } else
1609 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1610 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1611 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1612 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1613 status = _nfs4_proc_open_confirm(data);
1da177e4 1614 if (status != 0)
24ac23ab 1615 return status;
1da177e4
LT		 1616 }
1617 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1618 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1619 return 0;
1da177e4
LT		 1620}
1621
d83217c1 1622static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1623{
a78cb57a 1624 unsigned int loop;
6b30954e 1625 int ret;
58d9714a 1626
a78cb57a 1627 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1628 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1629 if (ret != 0)
a78cb57a 1630 break;
e598d843
TM		 1631 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1632 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1633 break;
0400a6b0 1634 nfs4_schedule_state_manager(clp);
a78cb57a 1635 ret = -EIO;
6b30954e 1636 }
a78cb57a 1637 return ret;
58d9714a
TM		 1638}
1639
d83217c1
AA		 1640static int nfs4_recover_expired_lease(struct nfs_server *server)
1641{
1642 return nfs4_client_recover_expired_lease(server->nfs_client);
1643}
1644
1da177e4
LT		 1645/*
1646 * OPEN_EXPIRED:
1647 * reclaim state on the server after a network partition.
1648 * Assumes caller holds the appropriate lock
1649 */
539cd03a 1650static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1651{
e56e0b78 1652 struct nfs4_opendata *opendata;
864472e9 1653 int ret;
1da177e4 1654
6f220ed5
TM		 1655 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1656 if (IS_ERR(opendata))
1657 return PTR_ERR(opendata);
864472e9 1658 ret = nfs4_open_recover(opendata, state);
35d05778 1659 if (ret == -ESTALE)
3d4ff43d 1660 d_drop(ctx->dentry);
c6d00e63 1661 nfs4_opendata_put(opendata);
864472e9 1662 return ret;
1da177e4
LT		 1663}
1664
a9ed2e25 1665static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1666{
539cd03a 1667 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1668 struct nfs4_exception exception = { };
1669 int err;
1670
1671 do {
539cd03a 1672 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1673 switch (err) {
1674 default:
1675 goto out;
1676 case -NFS4ERR_GRACE:
1677 case -NFS4ERR_DELAY:
1678 nfs4_handle_exception(server, err, &exception);
1679 err = 0;
1680 }
202b50dc 1681 } while (exception.retry);
a9ed2e25 1682out:
202b50dc
TM		 1683 return err;
1684}
1685
1da177e4
LT		 1686static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1687{
1da177e4 1688 struct nfs_open_context *ctx;
864472e9 1689 int ret;
1da177e4 1690
864472e9
TM		 1691 ctx = nfs4_state_find_open_context(state);
1692 if (IS_ERR(ctx))
1693 return PTR_ERR(ctx);
539cd03a 1694 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1695 put_nfs_open_context(ctx);
1696 return ret;
1da177e4
LT		 1697}
1698
f062eb6c
BS		 1699#if defined(CONFIG_NFS_V4_1)
1700static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1701{
1702 int status;
1703 struct nfs_server *server = NFS_SERVER(state->inode);
1704
1705 status = nfs41_test_stateid(server, state);
1706 if (status == NFS_OK)
1707 return 0;
1708 nfs41_free_stateid(server, state);
1709 return nfs4_open_expired(sp, state);
1710}
1711#endif
1712
aa53ed54
JL		 1713/*
1714 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1715 * fields corresponding to attributes that were used to store the verifier.
1716 * Make sure we clobber those fields in the later setattr call
1717 */
1718static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1719{
1720 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1721 !(sattr->ia_valid & ATTR_ATIME_SET))
1722 sattr->ia_valid |= ATTR_ATIME;
1723
1724 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1725 !(sattr->ia_valid & ATTR_MTIME_SET))
1726 sattr->ia_valid |= ATTR_MTIME;
1727}
1728
1da177e4 1729/*
24ac23ab 1730 * Returns a referenced nfs4_state
1da177e4 1731 */
82a2c1b7 1732static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1733{
1734 struct nfs4_state_owner *sp;
1735 struct nfs4_state *state = NULL;
1736 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1737 struct nfs4_opendata *opendata;
aac00a8d 1738 int status;
1da177e4
LT		 1739
1740 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1741 status = -ENOMEM;
1742 if (!(sp = nfs4_get_state_owner(server, cred))) {
1743 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1744 goto out_err;
1745 }
58d9714a
TM		 1746 status = nfs4_recover_expired_lease(server);
1747 if (status != 0)
b4454fe1 1748 goto err_put_state_owner;
82a2c1b7
AV		 1749 if (dentry->d_inode != NULL)
1750 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1751 status = -ENOMEM;
82a2c1b7 1752 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1753 if (opendata == NULL)
95d35cb4 1754 goto err_put_state_owner;
1da177e4 1755
82a2c1b7
AV		 1756 if (dentry->d_inode != NULL)
1757 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1758
24ac23ab 1759 status = _nfs4_proc_open(opendata);
1da177e4 1760 if (status != 0)
c6d00e63 1761 goto err_opendata_put;
1da177e4 1762
24ac23ab 1763 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1764 status = PTR_ERR(state);
1765 if (IS_ERR(state))
c6d00e63 1766 goto err_opendata_put;
0df5dd4a 1767 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1768 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1769
1770 if (opendata->o_arg.open_flags & O_EXCL) {
1771 nfs4_exclusive_attrset(opendata, sattr);
1772
1773 nfs_fattr_init(opendata->o_res.f_attr);
1774 status = nfs4_do_setattr(state->inode, cred,
1775 opendata->o_res.f_attr, sattr,
1776 state);
1777 if (status == 0)
1778 nfs_setattr_update_inode(state->inode, sattr);
1779 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1780 }
c6d00e63 1781 nfs4_opendata_put(opendata);
1da177e4 1782 nfs4_put_state_owner(sp);
1da177e4
LT		 1783 *res = state;
1784 return 0;
c6d00e63
TM		 1785err_opendata_put:
1786 nfs4_opendata_put(opendata);
e56e0b78
TM		 1787err_put_state_owner:
1788 nfs4_put_state_owner(sp);
1da177e4 1789out_err:
1da177e4
LT		 1790 *res = NULL;
1791 return status;
1792}
1793
1794
82a2c1b7 1795static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1796{
1797 struct nfs4_exception exception = { };
1798 struct nfs4_state *res;
1799 int status;
1800
1801 do {
82a2c1b7 1802 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1803 if (status == 0)
1804 break;
1805 /* NOTE: BAD_SEQID means the server and client disagree about the
1806 * book-keeping w.r.t. state-changing operations
1807 * (OPEN/CLOSE/LOCK/LOCKU...)
1808 * It is actually a sign of a bug on the client or on the server.
1809 *
1810 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1811 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1812 * have unhashed the old state_owner for us, and that we can
1813 * therefore safely retry using a new one. We should still warn
1814 * the user though...
1815 */
1816 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1817 printk(KERN_WARNING "NFS: v4 server %s "
1818 " returned a bad sequence-id error!\n",
1819 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1820 exception.retry = 1;
1821 continue;
1822 }
550f5747
TM		 1823 /*
1824 * BAD_STATEID on OPEN means that the server cancelled our
1825 * state before it received the OPEN_CONFIRM.
1826 * Recover by retrying the request as per the discussion
1827 * on Page 181 of RFC3530.
1828 */
1829 if (status == -NFS4ERR_BAD_STATEID) {
1830 exception.retry = 1;
1831 continue;
1832 }
aac00a8d
TM		 1833 if (status == -EAGAIN) {
1834 /* We must have found a delegation */
1835 exception.retry = 1;
1836 continue;
1837 }
1da177e4
LT		 1838 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1839 status, &exception));
1840 } while (exception.retry);
1841 return res;
1842}
1843
659bfcd6
TM		 1844static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1845 struct nfs_fattr *fattr, struct iattr *sattr,
1846 struct nfs4_state *state)
1da177e4 1847{
3e4f6290 1848 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1849 struct nfs_setattrargs arg = {
3e4f6290 1850 .fh = NFS_FH(inode),
1da177e4
LT		 1851 .iap = sattr,
1852 .server = server,
1853 .bitmask = server->attr_bitmask,
1854 };
1855 struct nfs_setattrres res = {
1856 .fattr = fattr,
1857 .server = server,
1858 };
1859 struct rpc_message msg = {
659bfcd6
TM		 1860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1861 .rpc_argp = &arg,
1862 .rpc_resp = &res,
1863 .rpc_cred = cred,
1da177e4 1864 };
26e976a8 1865 unsigned long timestamp = jiffies;
65e4308d 1866 int status;
1da177e4 1867
0e574af1 1868 nfs_fattr_init(fattr);
1da177e4 1869
3e4f6290
TM		 1870 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1871 /* Use that stateid */
1872 } else if (state != NULL) {
77041ed9 1873 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1874 } else
1da177e4
LT		 1875 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1876
7c513058 1877 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1878 if (status == 0 && state != NULL)
1879 renew_lease(server, timestamp);
65e4308d 1880 return status;
1da177e4
LT		 1881}
1882
659bfcd6
TM		 1883static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1884 struct nfs_fattr *fattr, struct iattr *sattr,
1885 struct nfs4_state *state)
1da177e4 1886{
3e4f6290 1887 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1888 struct nfs4_exception exception = { };
1889 int err;
1890 do {
1891 err = nfs4_handle_exception(server,
659bfcd6 1892 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1893 &exception);
1894 } while (exception.retry);
1895 return err;
1896}
1897
1898struct nfs4_closedata {
1899 struct inode *inode;
1900 struct nfs4_state *state;
1901 struct nfs_closeargs arg;
1902 struct nfs_closeres res;
516a6af6 1903 struct nfs_fattr fattr;
26e976a8 1904 unsigned long timestamp;
f7e8917a
FI		 1905 bool roc;
1906 u32 roc_barrier;
1da177e4
LT		 1907};
1908
963d8fe5 1909static void nfs4_free_closedata(void *data)
9512135d 1910{
963d8fe5
TM		 1911 struct nfs4_closedata *calldata = data;
1912 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1913 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1914
f7e8917a
FI		 1915 if (calldata->roc)
1916 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1917 nfs4_put_open_state(calldata->state);
1918 nfs_free_seqid(calldata->arg.seqid);
9512135d 1919 nfs4_put_state_owner(sp);
643168c2 1920 nfs_sb_deactive(sb);
9512135d
TM		 1921 kfree(calldata);
1922}
1923
88069f77
TM		 1924static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1925 fmode_t fmode)
1926{
1927 spin_lock(&state->owner->so_lock);
1928 if (!(fmode & FMODE_READ))
1929 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1930 if (!(fmode & FMODE_WRITE))
1931 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1932 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1933 spin_unlock(&state->owner->so_lock);
1934}
1935
963d8fe5 1936static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1937{
963d8fe5 1938 struct nfs4_closedata *calldata = data;
1da177e4 1939 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1940 struct nfs_server *server = NFS_SERVER(calldata->inode);
1941
14516c3a
TM		 1942 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1943 return;
1da177e4
LT		 1944 /* hmm. we are done with the inode, and in the process of freeing
1945 * the state_owner. we keep this around to process errors
1946 */
1da177e4
LT		 1947 switch (task->tk_status) {
1948 case 0:
f7e8917a
FI		 1949 if (calldata->roc)
1950 pnfs_roc_set_barrier(state->inode,
1951 calldata->roc_barrier);
45328c35 1952 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1953 renew_lease(server, calldata->timestamp);
88069f77
TM		 1954 nfs4_close_clear_stateid_flags(state,
1955 calldata->arg.fmode);
1da177e4
LT		 1956 break;
1957 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1958 case -NFS4ERR_OLD_STATEID:
1959 case -NFS4ERR_BAD_STATEID:
1da177e4 1960 case -NFS4ERR_EXPIRED:
dc0b027d 1961 if (calldata->arg.fmode == 0)
9e33bed5 1962 break;
1da177e4 1963 default:
72211dbe
TM		 1964 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1965 rpc_restart_call_prepare(task);
1da177e4 1966 }
72211dbe 1967 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1968 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1969}
1970
4ce70ada 1971static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1972{
4ce70ada 1973 struct nfs4_closedata *calldata = data;
9512135d 1974 struct nfs4_state *state = calldata->state;
88069f77 1975 int call_close = 0;
9512135d 1976
963d8fe5 1977 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1978 return;
003707c7 1979
88069f77
TM		 1980 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1981 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1982 spin_lock(&state->owner->so_lock);
003707c7 1983 /* Calculate the change in open mode */
e7616923 1984 if (state->n_rdwr == 0) {
003707c7 1985 if (state->n_rdonly == 0) {
88069f77
TM		 1986 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1987 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1988 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1989 }
1990 if (state->n_wronly == 0) {
88069f77
TM		 1991 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1992 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1993 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1994 }
e7616923 1995 }
4cecb76f 1996 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1997
1998 if (!call_close) {
963d8fe5
TM		 1999 /* Note: exit _without_ calling nfs4_close_done */
2000 task->tk_action = NULL;
9512135d
TM		 2001 return;
2002 }
88069f77 2003
f7e8917a 2004 if (calldata->arg.fmode == 0) {
88069f77 2005 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2006 if (calldata->roc &&
2007 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2008 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2009 task, NULL);
2010 return;
2011 }
2012 }
88069f77 2013
516a6af6 2014 nfs_fattr_init(calldata->res.fattr);
26e976a8 2015 calldata->timestamp = jiffies;
035168ab 2016 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 2017 &calldata->arg.seq_args, &calldata->res.seq_res,
2018 1, task))
2019 return;
5138fde0 2020 rpc_call_start(task);
1da177e4
LT		 2021}
2022
963d8fe5 2023static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2024 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2025 .rpc_call_done = nfs4_close_done,
2026 .rpc_release = nfs4_free_closedata,
2027};
2028
1da177e4
LT		 2029/*
2030 * It is possible for data to be read/written from a mem-mapped file
2031 * after the sys_close call (which hits the vfs layer as a flush).
2032 * This means that we can't safely call nfsv4 close on a file until
2033 * the inode is cleared. This in turn means that we are not good
2034 * NFSv4 citizens - we do not indicate to the server to update the file's
2035 * share state even when we are done with one of the three share
2036 * stateid's in the inode.
2037 *
2038 * NOTE: Caller must be holding the sp->so_owner semaphore!
2039 */
643168c2 2040int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2041{
4a35bd41 2042 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2043 struct nfs4_closedata *calldata;
b39e625b
TM		 2044 struct nfs4_state_owner *sp = state->owner;
2045 struct rpc_task *task;
5138fde0
TM		 2046 struct rpc_message msg = {
2047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2048 .rpc_cred = state->owner->so_cred,
2049 };
c970aa85
TM		 2050 struct rpc_task_setup task_setup_data = {
2051 .rpc_client = server->client,
5138fde0 2052 .rpc_message = &msg,
c970aa85 2053 .callback_ops = &nfs4_close_ops,
101070ca 2054 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2055 .flags = RPC_TASK_ASYNC,
2056 };
9512135d 2057 int status = -ENOMEM;
1da177e4 2058
8535b2be 2059 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2060 if (calldata == NULL)
9512135d 2061 goto out;
4a35bd41 2062 calldata->inode = state->inode;
1da177e4 2063 calldata->state = state;
4a35bd41 2064 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2065 calldata->arg.stateid = &state->open_stateid;
1da177e4 2066 /* Serialization for the sequence id */
8535b2be 2067 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2068 if (calldata->arg.seqid == NULL)
2069 goto out_free_calldata;
dc0b027d 2070 calldata->arg.fmode = 0;
a65318bf 2071 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2072 calldata->res.fattr = &calldata->fattr;
c1d51931 2073 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2074 calldata->res.server = server;
f7e8917a 2075 calldata->roc = roc;
643168c2 2076 nfs_sb_active(calldata->inode->i_sb);
9512135d 2077
1174dd1f
TM		 2078 msg.rpc_argp = &calldata->arg;
2079 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2080 task_setup_data.callback_data = calldata;
2081 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2082 if (IS_ERR(task))
2083 return PTR_ERR(task);
a49c3c77
TM		 2084 status = 0;
2085 if (wait)
2086 status = rpc_wait_for_completion_task(task);
b39e625b 2087 rpc_put_task(task);
a49c3c77 2088 return status;
9512135d
TM		 2089out_free_calldata:
2090 kfree(calldata);
2091out:
f7e8917a
FI		 2092 if (roc)
2093 pnfs_roc_release(state->inode);
b39e625b
TM		 2094 nfs4_put_open_state(state);
2095 nfs4_put_state_owner(sp);
9512135d 2096 return status;
1da177e4
LT		 2097}
2098
2b484297 2099static struct inode *
cd9a1c0e 2100nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2101{
1da177e4 2102 struct nfs4_state *state;
1da177e4 2103
565277f6 2104 /* Protect against concurrent sillydeletes */
3d4ff43d 2105 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2106 if (IS_ERR(state))
2107 return ERR_CAST(state);
cd9a1c0e 2108 ctx->state = state;
f46e0bd3 2109 return igrab(state->inode);
1da177e4
LT		 2110}
2111
1185a552 2112static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2113{
2114 if (ctx->state == NULL)
2115 return;
2116 if (is_sync)
643168c2 2117 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2118 else
643168c2 2119 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2120}
1da177e4
LT		 2121
2122static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2123{
43652ad5
BH		 2124 struct nfs4_server_caps_arg args = {
2125 .fhandle = fhandle,
2126 };
1da177e4
LT		 2127 struct nfs4_server_caps_res res = {};
2128 struct rpc_message msg = {
2129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2130 .rpc_argp = &args,
1da177e4
LT		 2131 .rpc_resp = &res,
2132 };
2133 int status;
2134
7c513058 2135 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2136 if (status == 0) {
2137 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2138 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2139 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2140 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2141 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2142 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2143 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2144 server->caps |= NFS_CAP_ACLS;
2145 if (res.has_links != 0)
2146 server->caps |= NFS_CAP_HARDLINKS;
2147 if (res.has_symlinks != 0)
2148 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2149 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2150 server->caps |= NFS_CAP_FILEID;
2151 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2152 server->caps |= NFS_CAP_MODE;
2153 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2154 server->caps |= NFS_CAP_NLINK;
2155 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2156 server->caps |= NFS_CAP_OWNER;
2157 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2158 server->caps |= NFS_CAP_OWNER_GROUP;
2159 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2160 server->caps |= NFS_CAP_ATIME;
2161 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2162 server->caps |= NFS_CAP_CTIME;
2163 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2164 server->caps |= NFS_CAP_MTIME;
2165
a65318bf
TM		 2166 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2167 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2168 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2169 server->acl_bitmask = res.acl_bitmask;
2170 }
cccef3b9 2171
1da177e4
LT		 2172 return status;
2173}
2174
55a97593 2175int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2176{
2177 struct nfs4_exception exception = { };
2178 int err;
2179 do {
2180 err = nfs4_handle_exception(server,
2181 _nfs4_server_capabilities(server, fhandle),
2182 &exception);
2183 } while (exception.retry);
2184 return err;
2185}
2186
2187static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2188 struct nfs_fsinfo *info)
2189{
1da177e4
LT		 2190 struct nfs4_lookup_root_arg args = {
2191 .bitmask = nfs4_fattr_bitmap,
2192 };
2193 struct nfs4_lookup_res res = {
2194 .server = server,
0e574af1 2195 .fattr = info->fattr,
1da177e4
LT		 2196 .fh = fhandle,
2197 };
2198 struct rpc_message msg = {
2199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2200 .rpc_argp = &args,
2201 .rpc_resp = &res,
2202 };
008f55d0 2203
0e574af1 2204 nfs_fattr_init(info->fattr);
7c513058 2205 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2206}
2207
2208static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2209 struct nfs_fsinfo *info)
2210{
2211 struct nfs4_exception exception = { };
2212 int err;
2213 do {
fb8a5ba8
BS		 2214 err = _nfs4_lookup_root(server, fhandle, info);
2215 switch (err) {
2216 case 0:
2217 case -NFS4ERR_WRONGSEC:
2218 break;
2219 default:
2220 err = nfs4_handle_exception(server, err, &exception);
2221 }
1da177e4
LT		 2222 } while (exception.retry);
2223 return err;
2224}
2225
8f70e95f
BS		 2226static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2227 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2228{
2229 struct rpc_auth *auth;
2230 int ret;
2231
2232 auth = rpcauth_create(flavor, server->client);
2233 if (!auth) {
2234 ret = -EIO;
2235 goto out;
2236 }
2237 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2238out:
2239 return ret;
2240}
2241
801a16dc 2242static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2243 struct nfs_fsinfo *info)
1da177e4 2244{
8f70e95f 2245 int i, len, status = 0;
0fabee24 2246 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2247
801a16dc
BS		 2248 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2249 flav_array[len] = RPC_AUTH_NULL;
2250 len += 1;
8f70e95f
BS		 2251
2252 for (i = 0; i < len; i++) {
2253 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2254 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2255 continue;
2256 break;
8f70e95f 2257 }
fb8a5ba8
BS		 2258 /*
2259 * -EACCESS could mean that the user doesn't have correct permissions
2260 * to access the mount. It could also mean that we tried to mount
2261 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2262 * existing mount programs don't handle -EACCES very well so it should
2263 * be mapped to -EPERM instead.
2264 */
2265 if (status == -EACCES)
2266 status = -EPERM;
801a16dc
BS		 2267 return status;
2268}
2269
2270/*
2271 * get the file handle for the "/" directory on the server
2272 */
2273static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2274 struct nfs_fsinfo *info)
2275{
fca78d6d 2276 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2277 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2278 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2279 /*
2280 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2281 * by nfs4_map_errors() as this function exits.
2282 */
fca78d6d 2283 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2284 if (status == 0)
2285 status = nfs4_server_capabilities(server, fhandle);
2286 if (status == 0)
2287 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2288 return nfs4_map_errors(status);
1da177e4
LT		 2289}
2290
533eb461 2291static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
6b97fd3d
MN		 2292/*
2293 * Get locations and (maybe) other attributes of a referral.
2294 * Note that we'll actually follow the referral later when
2295 * we detect fsid mismatch in inode revalidation
2296 */
533eb461
AA		 2297static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2298 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2299{
2300 int status = -ENOMEM;
2301 struct page *page = NULL;
2302 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2303
2304 page = alloc_page(GFP_KERNEL);
2305 if (page == NULL)
2306 goto out;
2307 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2308 if (locations == NULL)
2309 goto out;
2310
c228fd3a 2311 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2312 if (status != 0)
2313 goto out;
2314 /* Make sure server returned a different fsid for the referral */
2315 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2316 dprintk("%s: server did not return a different fsid for"
2317 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2318 status = -EIO;
2319 goto out;
2320 }
533eb461
AA		 2321 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2322 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2323
533eb461 2324 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2325 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2326 memset(fhandle, 0, sizeof(struct nfs_fh));
2327out:
2328 if (page)
2329 __free_page(page);
5d7ca35a 2330 kfree(locations);
6b97fd3d
MN		 2331 return status;
2332}
2333
1da177e4
LT		 2334static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2335{
2336 struct nfs4_getattr_arg args = {
2337 .fh = fhandle,
2338 .bitmask = server->attr_bitmask,
2339 };
2340 struct nfs4_getattr_res res = {
2341 .fattr = fattr,
2342 .server = server,
2343 };
2344 struct rpc_message msg = {
2345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2346 .rpc_argp = &args,
2347 .rpc_resp = &res,
2348 };
2349
0e574af1 2350 nfs_fattr_init(fattr);
7c513058 2351 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2352}
2353
2354static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2355{
2356 struct nfs4_exception exception = { };
2357 int err;
2358 do {
2359 err = nfs4_handle_exception(server,
2360 _nfs4_proc_getattr(server, fhandle, fattr),
2361 &exception);
2362 } while (exception.retry);
2363 return err;
2364}
2365
2366/*
2367 * The file is not closed if it is opened due to the a request to change
2368 * the size of the file. The open call will not be needed once the
2369 * VFS layer lookup-intents are implemented.
2370 *
2371 * Close is called when the inode is destroyed.
2372 * If we haven't opened the file for O_WRONLY, we
2373 * need to in the size_change case to obtain a stateid.
2374 *
2375 * Got race?
2376 * Because OPEN is always done by name in nfsv4, it is
2377 * possible that we opened a different file by the same
2378 * name. We can recognize this race condition, but we
2379 * can't do anything about it besides returning an error.
2380 *
2381 * This will be fixed with VFS changes (lookup-intent).
2382 */
2383static int
2384nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2385 struct iattr *sattr)
2386{
08e9eac4 2387 struct inode *inode = dentry->d_inode;
659bfcd6 2388 struct rpc_cred *cred = NULL;
d530838b 2389 struct nfs4_state *state = NULL;
1da177e4
LT		 2390 int status;
2391
8a1636c4
BH		 2392 if (pnfs_ld_layoutret_on_setattr(inode))
2393 pnfs_return_layout(inode);
2394
0e574af1 2395 nfs_fattr_init(fattr);
1da177e4 2396
d530838b 2397 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2398 if (sattr->ia_valid & ATTR_FILE) {
2399 struct nfs_open_context *ctx;
2400
2401 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2402 if (ctx) {
2403 cred = ctx->cred;
2404 state = ctx->state;
2405 }
659bfcd6 2406 }
08e9eac4 2407
659bfcd6 2408 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2409 if (status == 0)
2410 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2411 return status;
2412}
2413
0c2e53f1
TM		 2414static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2415 const struct qstr *name, struct nfs_fh *fhandle,
2416 struct nfs_fattr *fattr)
2b3de441 2417{
0c2e53f1 2418 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2419 int status;
2420 struct nfs4_lookup_arg args = {
2421 .bitmask = server->attr_bitmask,
0c2e53f1 2422 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2423 .name = name,
2424 };
2425 struct nfs4_lookup_res res = {
2426 .server = server,
2427 .fattr = fattr,
2428 .fh = fhandle,
2429 };
2430 struct rpc_message msg = {
2431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2432 .rpc_argp = &args,
2433 .rpc_resp = &res,
2434 };
2435
2436 nfs_fattr_init(fattr);
2437
1da177e4 2438 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2439 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2440 dprintk("NFS reply lookup: %d\n", status);
2441 return status;
2442}
2443
7ebb9315
BS		 2444void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2445{
2446 memset(fh, 0, sizeof(struct nfs_fh));
2447 fattr->fsid.major = 1;
2448 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2449 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2450 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2451 fattr->nlink = 2;
2452}
2453
7c513058
BS		 2454static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2455 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2456{
2457 struct nfs4_exception exception = { };
2458 int err;
2459 do {
0c2e53f1
TM		 2460 int status;
2461
2462 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2463 switch (status) {
08ef7bd3
TM		 2464 case -NFS4ERR_BADNAME:
2465 return -ENOENT;
0c2e53f1 2466 case -NFS4ERR_MOVED:
a6f498a8 2467 return nfs4_get_referral(dir, name, fattr, fhandle);
0c2e53f1 2468 case -NFS4ERR_WRONGSEC:
7ebb9315 2469 nfs_fixup_secinfo_attributes(fattr, fhandle);
0c2e53f1
TM		 2470 }
2471 err = nfs4_handle_exception(NFS_SERVER(dir),
2472 status, &exception);
1da177e4
LT		 2473 } while (exception.retry);
2474 return err;
2475}
2476
2477static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2478{
76b32999 2479 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2480 struct nfs4_accessargs args = {
2481 .fh = NFS_FH(inode),
76b32999
TM		 2482 .bitmask = server->attr_bitmask,
2483 };
2484 struct nfs4_accessres res = {
2485 .server = server,
1da177e4 2486 };
1da177e4
LT		 2487 struct rpc_message msg = {
2488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2489 .rpc_argp = &args,
2490 .rpc_resp = &res,
2491 .rpc_cred = entry->cred,
2492 };
2493 int mode = entry->mask;
2494 int status;
2495
2496 /*
2497 * Determine which access bits we want to ask for...
2498 */
2499 if (mode & MAY_READ)
2500 args.access |= NFS4_ACCESS_READ;
2501 if (S_ISDIR(inode->i_mode)) {
2502 if (mode & MAY_WRITE)
2503 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2504 if (mode & MAY_EXEC)
2505 args.access |= NFS4_ACCESS_LOOKUP;
2506 } else {
2507 if (mode & MAY_WRITE)
2508 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2509 if (mode & MAY_EXEC)
2510 args.access |= NFS4_ACCESS_EXECUTE;
2511 }
c407d41a
TM		 2512
2513 res.fattr = nfs_alloc_fattr();
2514 if (res.fattr == NULL)
2515 return -ENOMEM;
2516
7c513058 2517 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2518 if (!status) {
2519 entry->mask = 0;
2520 if (res.access & NFS4_ACCESS_READ)
2521 entry->mask |= MAY_READ;
2522 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2523 entry->mask |= MAY_WRITE;
2524 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2525 entry->mask |= MAY_EXEC;
c407d41a 2526 nfs_refresh_inode(inode, res.fattr);
1da177e4 2527 }
c407d41a 2528 nfs_free_fattr(res.fattr);
1da177e4
LT		 2529 return status;
2530}
2531
2532static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2533{
2534 struct nfs4_exception exception = { };
2535 int err;
2536 do {
2537 err = nfs4_handle_exception(NFS_SERVER(inode),
2538 _nfs4_proc_access(inode, entry),
2539 &exception);
2540 } while (exception.retry);
2541 return err;
2542}
2543
2544/*
2545 * TODO: For the time being, we don't try to get any attributes
2546 * along with any of the zero-copy operations READ, READDIR,
2547 * READLINK, WRITE.
2548 *
2549 * In the case of the first three, we want to put the GETATTR
2550 * after the read-type operation -- this is because it is hard
2551 * to predict the length of a GETATTR response in v4, and thus
2552 * align the READ data correctly. This means that the GETATTR
2553 * may end up partially falling into the page cache, and we should
2554 * shift it into the 'tail' of the xdr_buf before processing.
2555 * To do this efficiently, we need to know the total length
2556 * of data received, which doesn't seem to be available outside
2557 * of the RPC layer.
2558 *
2559 * In the case of WRITE, we also want to put the GETATTR after
2560 * the operation -- in this case because we want to make sure
2561 * we get the post-operation mtime and size. This means that
2562 * we can't use xdr_encode_pages() as written: we need a variant
2563 * of it which would leave room in the 'tail' iovec.
2564 *
2565 * Both of these changes to the XDR layer would in fact be quite
2566 * minor, but I decided to leave them for a subsequent patch.
2567 */
2568static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2569 unsigned int pgbase, unsigned int pglen)
2570{
2571 struct nfs4_readlink args = {
2572 .fh = NFS_FH(inode),
2573 .pgbase = pgbase,
2574 .pglen = pglen,
2575 .pages = &page,
2576 };
f50c7000 2577 struct nfs4_readlink_res res;
1da177e4
LT		 2578 struct rpc_message msg = {
2579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2580 .rpc_argp = &args,
f50c7000 2581 .rpc_resp = &res,
1da177e4
LT		 2582 };
2583
7c513058 2584 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2585}
2586
2587static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2588 unsigned int pgbase, unsigned int pglen)
2589{
2590 struct nfs4_exception exception = { };
2591 int err;
2592 do {
2593 err = nfs4_handle_exception(NFS_SERVER(inode),
2594 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2595 &exception);
2596 } while (exception.retry);
2597 return err;
2598}
2599
1da177e4
LT		 2600/*
2601 * Got race?
2602 * We will need to arrange for the VFS layer to provide an atomic open.
2603 * Until then, this create/open method is prone to inefficiency and race
2604 * conditions due to the lookup, create, and open VFS calls from sys_open()
2605 * placed on the wire.
2606 *
2607 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2608 * The file will be opened again in the subsequent VFS open call
2609 * (nfs4_proc_file_open).
2610 *
2611 * The open for read will just hang around to be used by any process that
2612 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2613 */
2614
2615static int
2616nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2617 int flags, struct nfs_open_context *ctx)
1da177e4 2618{
82a2c1b7 2619 struct dentry *de = dentry;
1da177e4 2620 struct nfs4_state *state;
c0204fd2
TM		 2621 struct rpc_cred *cred = NULL;
2622 fmode_t fmode = 0;
1da177e4
LT		 2623 int status = 0;
2624
c0204fd2
TM		 2625 if (ctx != NULL) {
2626 cred = ctx->cred;
3d4ff43d 2627 de = ctx->dentry;
c0204fd2 2628 fmode = ctx->mode;
1da177e4 2629 }
a8a5da99 2630 sattr->ia_mode &= ~current_umask();
82a2c1b7 2631 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2632 d_drop(dentry);
1da177e4
LT		 2633 if (IS_ERR(state)) {
2634 status = PTR_ERR(state);
c0204fd2 2635 goto out;
1da177e4 2636 }
d4d9cdcb 2637 d_add(dentry, igrab(state->inode));
d75340cc 2638 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2639 if (ctx != NULL)
2640 ctx->state = state;
02a913a7 2641 else
643168c2 2642 nfs4_close_sync(state, fmode);
1da177e4
LT		 2643out:
2644 return status;
2645}
2646
2647static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2648{
16e42959 2649 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2650 struct nfs_removeargs args = {
1da177e4 2651 .fh = NFS_FH(dir),
4fdc17b2
TM		 2652 .name.len = name->len,
2653 .name.name = name->name,
16e42959
TM		 2654 .bitmask = server->attr_bitmask,
2655 };
4fdc17b2 2656 struct nfs_removeres res = {
16e42959 2657 .server = server,
1da177e4 2658 };
1da177e4 2659 struct rpc_message msg = {
4fdc17b2
TM		 2660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2661 .rpc_argp = &args,
2662 .rpc_resp = &res,
1da177e4 2663 };
d346890b
TM		 2664 int status = -ENOMEM;
2665
2666 res.dir_attr = nfs_alloc_fattr();
2667 if (res.dir_attr == NULL)
2668 goto out;
1da177e4 2669
7c513058 2670 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2671 if (status == 0) {
2672 update_changeattr(dir, &res.cinfo);
d346890b 2673 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2674 }
d346890b
TM		 2675 nfs_free_fattr(res.dir_attr);
2676out:
1da177e4
LT		 2677 return status;
2678}
2679
2680static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2681{
2682 struct nfs4_exception exception = { };
2683 int err;
2684 do {
2685 err = nfs4_handle_exception(NFS_SERVER(dir),
2686 _nfs4_proc_remove(dir, name),
2687 &exception);
2688 } while (exception.retry);
2689 return err;
2690}
2691
e4eff1a6 2692static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2693{
e4eff1a6
TM		 2694 struct nfs_server *server = NFS_SERVER(dir);
2695 struct nfs_removeargs *args = msg->rpc_argp;
2696 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2697
a65318bf 2698 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2699 res->server = server;
dfb4f309 2700 res->seq_res.sr_slot = NULL;
1da177e4 2701 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2702}
2703
e4eff1a6 2704static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2705{
e4eff1a6
TM		 2706 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2707
14516c3a
TM		 2708 if (!nfs4_sequence_done(task, &res->seq_res))
2709 return 0;
9e33bed5 2710 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2711 return 0;
2712 update_changeattr(dir, &res->cinfo);
d346890b 2713 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2714 return 1;
1da177e4
LT		 2715}
2716
d3d4152a
JL		 2717static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2718{
2719 struct nfs_server *server = NFS_SERVER(dir);
2720 struct nfs_renameargs *arg = msg->rpc_argp;
2721 struct nfs_renameres *res = msg->rpc_resp;
2722
2723 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2724 arg->bitmask = server->attr_bitmask;
2725 res->server = server;
2726}
2727
2728static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2729 struct inode *new_dir)
2730{
2731 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2732
2733 if (!nfs4_sequence_done(task, &res->seq_res))
2734 return 0;
2735 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2736 return 0;
2737
2738 update_changeattr(old_dir, &res->old_cinfo);
2739 nfs_post_op_update_inode(old_dir, res->old_fattr);
2740 update_changeattr(new_dir, &res->new_cinfo);
2741 nfs_post_op_update_inode(new_dir, res->new_fattr);
2742 return 1;
2743}
2744
1da177e4
LT		 2745static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2746 struct inode *new_dir, struct qstr *new_name)
2747{
6caf2c82 2748 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2749 struct nfs_renameargs arg = {
1da177e4
LT		 2750 .old_dir = NFS_FH(old_dir),
2751 .new_dir = NFS_FH(new_dir),
2752 .old_name = old_name,
2753 .new_name = new_name,
6caf2c82
TM		 2754 .bitmask = server->attr_bitmask,
2755 };
e8582a8b 2756 struct nfs_renameres res = {
6caf2c82 2757 .server = server,
1da177e4 2758 };
1da177e4
LT		 2759 struct rpc_message msg = {
2760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2761 .rpc_argp = &arg,
2762 .rpc_resp = &res,
2763 };
011fff72 2764 int status = -ENOMEM;
1da177e4 2765
011fff72
TM		 2766 res.old_fattr = nfs_alloc_fattr();
2767 res.new_fattr = nfs_alloc_fattr();
2768 if (res.old_fattr == NULL || res.new_fattr == NULL)
2769 goto out;
1da177e4 2770
7c513058 2771 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2772 if (!status) {
2773 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2774 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2775 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2776 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2777 }
011fff72
TM		 2778out:
2779 nfs_free_fattr(res.new_fattr);
2780 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2781 return status;
2782}
2783
2784static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2785 struct inode *new_dir, struct qstr *new_name)
2786{
2787 struct nfs4_exception exception = { };
2788 int err;
2789 do {
2790 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2791 _nfs4_proc_rename(old_dir, old_name,
2792 new_dir, new_name),
2793 &exception);
2794 } while (exception.retry);
2795 return err;
2796}
2797
2798static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2799{
91ba2eee 2800 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2801 struct nfs4_link_arg arg = {
2802 .fh = NFS_FH(inode),
2803 .dir_fh = NFS_FH(dir),
2804 .name = name,
91ba2eee
TM		 2805 .bitmask = server->attr_bitmask,
2806 };
91ba2eee
TM		 2807 struct nfs4_link_res res = {
2808 .server = server,
1da177e4 2809 };
1da177e4
LT		 2810 struct rpc_message msg = {
2811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2812 .rpc_argp = &arg,
91ba2eee 2813 .rpc_resp = &res,
1da177e4 2814 };
136f2627
TM		 2815 int status = -ENOMEM;
2816
2817 res.fattr = nfs_alloc_fattr();
2818 res.dir_attr = nfs_alloc_fattr();
2819 if (res.fattr == NULL || res.dir_attr == NULL)
2820 goto out;
1da177e4 2821
7c513058 2822 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2823 if (!status) {
2824 update_changeattr(dir, &res.cinfo);
2825 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2826 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2827 }
136f2627
TM		 2828out:
2829 nfs_free_fattr(res.dir_attr);
2830 nfs_free_fattr(res.fattr);
1da177e4
LT		 2831 return status;
2832}
2833
2834static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2835{
2836 struct nfs4_exception exception = { };
2837 int err;
2838 do {
2839 err = nfs4_handle_exception(NFS_SERVER(inode),
2840 _nfs4_proc_link(inode, dir, name),
2841 &exception);
2842 } while (exception.retry);
2843 return err;
2844}
2845
57dc9a57
TM		 2846struct nfs4_createdata {
2847 struct rpc_message msg;
2848 struct nfs4_create_arg arg;
2849 struct nfs4_create_res res;
2850 struct nfs_fh fh;
2851 struct nfs_fattr fattr;
2852 struct nfs_fattr dir_fattr;
2853};
2854
2855static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2856 struct qstr *name, struct iattr *sattr, u32 ftype)
2857{
2858 struct nfs4_createdata *data;
2859
2860 data = kzalloc(sizeof(*data), GFP_KERNEL);
2861 if (data != NULL) {
2862 struct nfs_server *server = NFS_SERVER(dir);
2863
2864 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2865 data->msg.rpc_argp = &data->arg;
2866 data->msg.rpc_resp = &data->res;
2867 data->arg.dir_fh = NFS_FH(dir);
2868 data->arg.server = server;
2869 data->arg.name = name;
2870 data->arg.attrs = sattr;
2871 data->arg.ftype = ftype;
2872 data->arg.bitmask = server->attr_bitmask;
2873 data->res.server = server;
2874 data->res.fh = &data->fh;
2875 data->res.fattr = &data->fattr;
2876 data->res.dir_fattr = &data->dir_fattr;
2877 nfs_fattr_init(data->res.fattr);
2878 nfs_fattr_init(data->res.dir_fattr);
2879 }
2880 return data;
2881}
2882
2883static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2884{
7c513058 2885 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2886 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2887 if (status == 0) {
2888 update_changeattr(dir, &data->res.dir_cinfo);
2889 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2890 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2891 }
2892 return status;
2893}
2894
2895static void nfs4_free_createdata(struct nfs4_createdata *data)
2896{
2897 kfree(data);
2898}
2899
4f390c15 2900static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2901 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2902{
57dc9a57
TM		 2903 struct nfs4_createdata *data;
2904 int status = -ENAMETOOLONG;
1da177e4 2905
94a6d753 2906 if (len > NFS4_MAXPATHLEN)
57dc9a57 2907 goto out;
4f390c15 2908
57dc9a57
TM		 2909 status = -ENOMEM;
2910 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2911 if (data == NULL)
2912 goto out;
2913
2914 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2915 data->arg.u.symlink.pages = &page;
2916 data->arg.u.symlink.len = len;
1da177e4 2917
57dc9a57
TM		 2918 status = nfs4_do_create(dir, dentry, data);
2919
2920 nfs4_free_createdata(data);
2921out:
1da177e4
LT		 2922 return status;
2923}
2924
4f390c15 2925static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2926 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2927{
2928 struct nfs4_exception exception = { };
2929 int err;
2930 do {
2931 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2932 _nfs4_proc_symlink(dir, dentry, page,
2933 len, sattr),
1da177e4
LT		 2934 &exception);
2935 } while (exception.retry);
2936 return err;
2937}
2938
2939static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2940 struct iattr *sattr)
2941{
57dc9a57
TM		 2942 struct nfs4_createdata *data;
2943 int status = -ENOMEM;
1da177e4 2944
57dc9a57
TM		 2945 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2946 if (data == NULL)
2947 goto out;
2948
2949 status = nfs4_do_create(dir, dentry, data);
2950
2951 nfs4_free_createdata(data);
2952out:
1da177e4
LT		 2953 return status;
2954}
2955
2956static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2957 struct iattr *sattr)
2958{
2959 struct nfs4_exception exception = { };
2960 int err;
a8a5da99
AK		 2961
2962 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2963 do {
2964 err = nfs4_handle_exception(NFS_SERVER(dir),
2965 _nfs4_proc_mkdir(dir, dentry, sattr),
2966 &exception);
2967 } while (exception.retry);
2968 return err;
2969}
2970
2971static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2972 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2973{
2974 struct inode *dir = dentry->d_inode;
2975 struct nfs4_readdir_arg args = {
2976 .fh = NFS_FH(dir),
56e4ebf8 2977 .pages = pages,
1da177e4
LT		 2978 .pgbase = 0,
2979 .count = count,
96d25e53 2980 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2981 .plus = plus,
1da177e4
LT		 2982 };
2983 struct nfs4_readdir_res res;
2984 struct rpc_message msg = {
2985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2986 .rpc_argp = &args,
2987 .rpc_resp = &res,
2988 .rpc_cred = cred,
2989 };
2990 int status;
2991
3110ff80 2992 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2993 dentry->d_parent->d_name.name,
2994 dentry->d_name.name,
2995 (unsigned long long)cookie);
1da177e4
LT		 2996 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2997 res.pgbase = args.pgbase;
7c513058 2998 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 2999 if (status >= 0) {
1da177e4 3000 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3001 status += args.pgbase;
3002 }
c4812998
TM		 3003
3004 nfs_invalidate_atime(dir);
3005
3110ff80 3006 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3007 return status;
3008}
3009
3010static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3011 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3012{
3013 struct nfs4_exception exception = { };
3014 int err;
3015 do {
3016 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3017 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3018 pages, count, plus),
1da177e4
LT		 3019 &exception);
3020 } while (exception.retry);
3021 return err;
3022}
3023
3024static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3025 struct iattr *sattr, dev_t rdev)
3026{
57dc9a57
TM		 3027 struct nfs4_createdata *data;
3028 int mode = sattr->ia_mode;
3029 int status = -ENOMEM;
1da177e4
LT		 3030
3031 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3032 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3033
3034 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3035 if (data == NULL)
3036 goto out;
3037
1da177e4 3038 if (S_ISFIFO(mode))
57dc9a57 3039 data->arg.ftype = NF4FIFO;
1da177e4 3040 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3041 data->arg.ftype = NF4BLK;
3042 data->arg.u.device.specdata1 = MAJOR(rdev);
3043 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3044 }
3045 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3046 data->arg.ftype = NF4CHR;
3047 data->arg.u.device.specdata1 = MAJOR(rdev);
3048 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3049 }
1da177e4 3050
57dc9a57
TM		 3051 status = nfs4_do_create(dir, dentry, data);
3052
3053 nfs4_free_createdata(data);
3054out:
1da177e4
LT		 3055 return status;
3056}
3057
3058static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3059 struct iattr *sattr, dev_t rdev)
3060{
3061 struct nfs4_exception exception = { };
3062 int err;
a8a5da99
AK		 3063
3064 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3065 do {
3066 err = nfs4_handle_exception(NFS_SERVER(dir),
3067 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3068 &exception);
3069 } while (exception.retry);
3070 return err;
3071}
3072
3073static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3074 struct nfs_fsstat *fsstat)
3075{
3076 struct nfs4_statfs_arg args = {
3077 .fh = fhandle,
3078 .bitmask = server->attr_bitmask,
3079 };
24ad148a
BH		 3080 struct nfs4_statfs_res res = {
3081 .fsstat = fsstat,
3082 };
1da177e4
LT		 3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3085 .rpc_argp = &args,
24ad148a 3086 .rpc_resp = &res,
1da177e4
LT		 3087 };
3088
0e574af1 3089 nfs_fattr_init(fsstat->fattr);
7c513058 3090 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3091}
3092
3093static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3094{
3095 struct nfs4_exception exception = { };
3096 int err;
3097 do {
3098 err = nfs4_handle_exception(server,
3099 _nfs4_proc_statfs(server, fhandle, fsstat),
3100 &exception);
3101 } while (exception.retry);
3102 return err;
3103}
3104
3105static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3106 struct nfs_fsinfo *fsinfo)
3107{
3108 struct nfs4_fsinfo_arg args = {
3109 .fh = fhandle,
3110 .bitmask = server->attr_bitmask,
3111 };
3dda5e43
BH		 3112 struct nfs4_fsinfo_res res = {
3113 .fsinfo = fsinfo,
3114 };
1da177e4
LT		 3115 struct rpc_message msg = {
3116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3117 .rpc_argp = &args,
3dda5e43 3118 .rpc_resp = &res,
1da177e4
LT		 3119 };
3120
7c513058 3121 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3122}
3123
3124static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3125{
3126 struct nfs4_exception exception = { };
3127 int err;
3128
3129 do {
3130 err = nfs4_handle_exception(server,
3131 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3132 &exception);
3133 } while (exception.retry);
3134 return err;
3135}
3136
3137static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3138{
0e574af1 3139 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3140 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3141}
3142
3143static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3144 struct nfs_pathconf *pathconf)
3145{
3146 struct nfs4_pathconf_arg args = {
3147 .fh = fhandle,
3148 .bitmask = server->attr_bitmask,
3149 };
d45b2989
BH		 3150 struct nfs4_pathconf_res res = {
3151 .pathconf = pathconf,
3152 };
1da177e4
LT		 3153 struct rpc_message msg = {
3154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3155 .rpc_argp = &args,
d45b2989 3156 .rpc_resp = &res,
1da177e4
LT		 3157 };
3158
3159 /* None of the pathconf attributes are mandatory to implement */
3160 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3161 memset(pathconf, 0, sizeof(*pathconf));
3162 return 0;
3163 }
3164
0e574af1 3165 nfs_fattr_init(pathconf->fattr);
7c513058 3166 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3167}
3168
3169static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3170 struct nfs_pathconf *pathconf)
3171{
3172 struct nfs4_exception exception = { };
3173 int err;
3174
3175 do {
3176 err = nfs4_handle_exception(server,
3177 _nfs4_proc_pathconf(server, fhandle, pathconf),
3178 &exception);
3179 } while (exception.retry);
3180 return err;
3181}
3182
d20581aa
BH		 3183void __nfs4_read_done_cb(struct nfs_read_data *data)
3184{
3185 nfs_invalidate_atime(data->inode);
3186}
3187
cbdabc7f 3188static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3189{
ec06c096 3190 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3191
9e33bed5 3192 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3193 rpc_restart_call_prepare(task);
ec06c096 3194 return -EAGAIN;
1da177e4 3195 }
8850df99 3196
d20581aa 3197 __nfs4_read_done_cb(data);
1da177e4 3198 if (task->tk_status > 0)
ec06c096
TM		 3199 renew_lease(server, data->timestamp);
3200 return 0;
1da177e4
LT		 3201}
3202
cbdabc7f
AA		 3203static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3204{
3205
3206 dprintk("--> %s\n", __func__);
3207
3208 if (!nfs4_sequence_done(task, &data->res.seq_res))
3209 return -EAGAIN;
3210
d20581aa
BH		 3211 return data->read_done_cb ? data->read_done_cb(task, data) :
3212 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3213}
3214
bdc7f021 3215static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3216{
1da177e4 3217 data->timestamp = jiffies;
cbdabc7f 3218 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3219 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3220}
3221
cbdabc7f
AA		 3222/* Reset the the nfs_read_data to send the read to the MDS. */
3223void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3224{
3225 dprintk("%s Reset task for i/o through\n", __func__);
3226 put_lseg(data->lseg);
3227 data->lseg = NULL;
3228 /* offsets will differ in the dense stripe case */
3229 data->args.offset = data->mds_offset;
3230 data->ds_clp = NULL;
3231 data->args.fh = NFS_FH(data->inode);
3232 data->read_done_cb = nfs4_read_done_cb;
3233 task->tk_ops = data->mds_ops;
3234 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3235}
3236EXPORT_SYMBOL_GPL(nfs4_reset_read);
3237
b029bc9b 3238static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3239{
1da177e4
LT		 3240 struct inode *inode = data->inode;
3241
9e33bed5 3242 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3243 rpc_restart_call_prepare(task);
788e7a89 3244 return -EAGAIN;
1da177e4 3245 }
4f9838c7 3246 if (task->tk_status >= 0) {
1da177e4 3247 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3248 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3249 }
788e7a89 3250 return 0;
1da177e4
LT		 3251}
3252
b029bc9b
FI		 3253static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3254{
3255 if (!nfs4_sequence_done(task, &data->res.seq_res))
3256 return -EAGAIN;
d20581aa
BH		 3257 return data->write_done_cb ? data->write_done_cb(task, data) :
3258 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3259}
3260
a69aef14
FI		 3261/* Reset the the nfs_write_data to send the write to the MDS. */
3262void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3263{
3264 dprintk("%s Reset task for i/o through\n", __func__);
3265 put_lseg(data->lseg);
3266 data->lseg = NULL;
3267 data->ds_clp = NULL;
3268 data->write_done_cb = nfs4_write_done_cb;
3269 data->args.fh = NFS_FH(data->inode);
3270 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3271 data->args.offset = data->mds_offset;
3272 data->res.fattr = &data->fattr;
3273 task->tk_ops = data->mds_ops;
3274 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3275}
3276EXPORT_SYMBOL_GPL(nfs4_reset_write);
3277
bdc7f021 3278static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3279{
bdc7f021
TM		 3280 struct nfs_server *server = NFS_SERVER(data->inode);
3281
7ffd1064
FI		 3282 if (data->lseg) {
3283 data->args.bitmask = NULL;
3284 data->res.fattr = NULL;
3285 } else
3286 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3287 if (!data->write_done_cb)
3288 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3289 data->res.server = server;
1da177e4
LT		 3290 data->timestamp = jiffies;
3291
bdc7f021 3292 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3293}
3294
5f452431 3295static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3296{
1da177e4 3297 struct inode *inode = data->inode;
14516c3a 3298
9e33bed5 3299 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3300 rpc_restart_call_prepare(task);
788e7a89 3301 return -EAGAIN;
1da177e4 3302 }
9e08a3c5 3303 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3304 return 0;
1da177e4
LT		 3305}
3306
5f452431
FI		 3307static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3308{
3309 if (!nfs4_sequence_done(task, &data->res.seq_res))
3310 return -EAGAIN;
3311 return data->write_done_cb(task, data);
3312}
3313
bdc7f021 3314static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3315{
788e7a89 3316 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3317
3318 if (data->lseg) {
3319 data->args.bitmask = NULL;
3320 data->res.fattr = NULL;
3321 } else
3322 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3323 if (!data->write_done_cb)
3324 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3325 data->res.server = server;
bdc7f021 3326 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3327}
3328
9bc4e3ca
CL		 3329struct nfs4_renewdata {
3330 struct nfs_client *client;
3331 unsigned long timestamp;
3332};
3333
1da177e4
LT		 3334/*
3335 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3336 * standalone procedure for queueing an asynchronous RENEW.
3337 */
9bc4e3ca 3338static void nfs4_renew_release(void *calldata)
dc96aef9 3339{
9bc4e3ca
CL		 3340 struct nfs4_renewdata *data = calldata;
3341 struct nfs_client *clp = data->client;
dc96aef9 3342
0851de06
AB		 3343 if (atomic_read(&clp->cl_count) > 1)
3344 nfs4_schedule_state_renewal(clp);
3345 nfs_put_client(clp);
9bc4e3ca 3346 kfree(data);
dc96aef9
AB		 3347}
3348
9bc4e3ca 3349static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3350{
9bc4e3ca
CL		 3351 struct nfs4_renewdata *data = calldata;
3352 struct nfs_client *clp = data->client;
3353 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3354
3355 if (task->tk_status < 0) {
95baa25c 3356 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3357 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3358 return;
3359 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3360 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3361 return;
3362 }
3363 nfs4_schedule_path_down_recovery(clp);
1da177e4 3364 }
452e9352 3365 do_renew_lease(clp, timestamp);
1da177e4
LT		 3366}
3367
963d8fe5
TM		 3368static const struct rpc_call_ops nfs4_renew_ops = {
3369 .rpc_call_done = nfs4_renew_done,
dc96aef9 3370 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3371};
3372
2f60ea6b 3373static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3374{
3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3377 .rpc_argp = clp,
b4454fe1 3378 .rpc_cred = cred,
1da177e4 3379 };
9bc4e3ca 3380 struct nfs4_renewdata *data;
1da177e4 3381
2f60ea6b
TM		 3382 if (renew_flags == 0)
3383 return 0;
0851de06
AB		 3384 if (!atomic_inc_not_zero(&clp->cl_count))
3385 return -EIO;
b569ad34 3386 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3387 if (data == NULL)
3388 return -ENOMEM;
3389 data->client = clp;
3390 data->timestamp = jiffies;
1da177e4 3391 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3392 &nfs4_renew_ops, data);
1da177e4
LT		 3393}
3394
8534d4ec 3395static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3396{
3397 struct rpc_message msg = {
3398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3399 .rpc_argp = clp,
b4454fe1 3400 .rpc_cred = cred,
1da177e4
LT		 3401 };
3402 unsigned long now = jiffies;
3403 int status;
3404
3405 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3406 if (status < 0)
3407 return status;
452e9352 3408 do_renew_lease(clp, now);
1da177e4
LT		 3409 return 0;
3410}
3411
aa1870af
BF		 3412static inline int nfs4_server_supports_acls(struct nfs_server *server)
3413{
3414 return (server->caps & NFS_CAP_ACLS)
3415 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3416 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3417}
3418
3419/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3420 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3421 * the stack.
3422 */
3423#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3424
3425static void buf_to_pages(const void *buf, size_t buflen,
3426 struct page **pages, unsigned int *pgbase)
3427{
3428 const void *p = buf;
3429
3430 *pgbase = offset_in_page(buf);
3431 p -= *pgbase;
3432 while (p < buf + buflen) {
3433 *(pages++) = virt_to_page(p);
3434 p += PAGE_CACHE_SIZE;
3435 }
3436}
3437
e9e3d724
NH		 3438static int buf_to_pages_noslab(const void *buf, size_t buflen,
3439 struct page **pages, unsigned int *pgbase)
3440{
3441 struct page *newpage, **spages;
3442 int rc = 0;
3443 size_t len;
3444 spages = pages;
3445
3446 do {
43b7c3f0 3447 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3448 newpage = alloc_page(GFP_KERNEL);
3449
3450 if (newpage == NULL)
3451 goto unwind;
3452 memcpy(page_address(newpage), buf, len);
3453 buf += len;
3454 buflen -= len;
3455 *pages++ = newpage;
3456 rc++;
3457 } while (buflen != 0);
3458
3459 return rc;
3460
3461unwind:
3462 for(; rc > 0; rc--)
3463 __free_page(spages[rc-1]);
3464 return -ENOMEM;
3465}
3466
e50a1c2e
BF		 3467struct nfs4_cached_acl {
3468 int cached;
3469 size_t len;
3e9d4154 3470 char data[0];
e50a1c2e
BF		 3471};
3472
3473static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3474{
3475 struct nfs_inode *nfsi = NFS_I(inode);
3476
3477 spin_lock(&inode->i_lock);
3478 kfree(nfsi->nfs4_acl);
3479 nfsi->nfs4_acl = acl;
3480 spin_unlock(&inode->i_lock);
3481}
3482
3483static void nfs4_zap_acl_attr(struct inode *inode)
3484{
3485 nfs4_set_cached_acl(inode, NULL);
3486}
3487
3488static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3489{
3490 struct nfs_inode *nfsi = NFS_I(inode);
3491 struct nfs4_cached_acl *acl;
3492 int ret = -ENOENT;
3493
3494 spin_lock(&inode->i_lock);
3495 acl = nfsi->nfs4_acl;
3496 if (acl == NULL)
3497 goto out;
3498 if (buf == NULL) /* user is just asking for length */
3499 goto out_len;
3500 if (acl->cached == 0)
3501 goto out;
3502 ret = -ERANGE; /* see getxattr(2) man page */
3503 if (acl->len > buflen)
3504 goto out;
3505 memcpy(buf, acl->data, acl->len);
3506out_len:
3507 ret = acl->len;
3508out:
3509 spin_unlock(&inode->i_lock);
3510 return ret;
3511}
3512
3513static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3514{
3515 struct nfs4_cached_acl *acl;
3516
3517 if (buf && acl_len <= PAGE_SIZE) {
3518 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3519 if (acl == NULL)
3520 goto out;
3521 acl->cached = 1;
3522 memcpy(acl->data, buf, acl_len);
3523 } else {
3524 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3525 if (acl == NULL)
3526 goto out;
3527 acl->cached = 0;
3528 }
3529 acl->len = acl_len;
3530out:
3531 nfs4_set_cached_acl(inode, acl);
3532}
3533
16b4289c 3534static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3535{
aa1870af
BF		 3536 struct page *pages[NFS4ACL_MAXPAGES];
3537 struct nfs_getaclargs args = {
3538 .fh = NFS_FH(inode),
3539 .acl_pages = pages,
3540 .acl_len = buflen,
3541 };
663c79b3
BH		 3542 struct nfs_getaclres res = {
3543 .acl_len = buflen,
3544 };
e50a1c2e 3545 void *resp_buf;
aa1870af
BF		 3546 struct rpc_message msg = {
3547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3548 .rpc_argp = &args,
663c79b3 3549 .rpc_resp = &res,
aa1870af 3550 };
e50a1c2e 3551 struct page *localpage = NULL;
aa1870af
BF		 3552 int ret;
3553
e50a1c2e
BF		 3554 if (buflen < PAGE_SIZE) {
3555 /* As long as we're doing a round trip to the server anyway,
3556 * let's be prepared for a page of acl data. */
3557 localpage = alloc_page(GFP_KERNEL);
3558 resp_buf = page_address(localpage);
3559 if (localpage == NULL)
3560 return -ENOMEM;
3561 args.acl_pages[0] = localpage;
3562 args.acl_pgbase = 0;
663c79b3 3563 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3564 } else {
3565 resp_buf = buf;
3566 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3567 }
7c513058 3568 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3569 if (ret)
3570 goto out_free;
663c79b3
BH		 3571 if (res.acl_len > args.acl_len)
3572 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3573 else
663c79b3 3574 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3575 if (buf) {
3576 ret = -ERANGE;
663c79b3 3577 if (res.acl_len > buflen)
e50a1c2e
BF		 3578 goto out_free;
3579 if (localpage)
663c79b3 3580 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3581 }
663c79b3 3582 ret = res.acl_len;
e50a1c2e
BF		 3583out_free:
3584 if (localpage)
3585 __free_page(localpage);
aa1870af
BF		 3586 return ret;
3587}
3588
16b4289c
TM		 3589static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3590{
3591 struct nfs4_exception exception = { };
3592 ssize_t ret;
3593 do {
3594 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3595 if (ret >= 0)
3596 break;
3597 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3598 } while (exception.retry);
3599 return ret;
3600}
3601
e50a1c2e
BF		 3602static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3603{
3604 struct nfs_server *server = NFS_SERVER(inode);
3605 int ret;
3606
3607 if (!nfs4_server_supports_acls(server))
3608 return -EOPNOTSUPP;
3609 ret = nfs_revalidate_inode(server, inode);
3610 if (ret < 0)
3611 return ret;
08a22b39
AK		 3612 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3613 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3614 ret = nfs4_read_cached_acl(inode, buf, buflen);
3615 if (ret != -ENOENT)
3616 return ret;
3617 return nfs4_get_acl_uncached(inode, buf, buflen);
3618}
3619
16b4289c 3620static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3621{
3622 struct nfs_server *server = NFS_SERVER(inode);
3623 struct page *pages[NFS4ACL_MAXPAGES];
3624 struct nfs_setaclargs arg = {
3625 .fh = NFS_FH(inode),
3626 .acl_pages = pages,
3627 .acl_len = buflen,
3628 };
73c403a9 3629 struct nfs_setaclres res;
4b580ee3
BF		 3630 struct rpc_message msg = {
3631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3632 .rpc_argp = &arg,
73c403a9 3633 .rpc_resp = &res,
4b580ee3 3634 };
e9e3d724 3635 int ret, i;
4b580ee3
BF		 3636
3637 if (!nfs4_server_supports_acls(server))
3638 return -EOPNOTSUPP;
e9e3d724
NH		 3639 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3640 if (i < 0)
3641 return i;
642ac549 3642 nfs_inode_return_delegation(inode);
7c513058 3643 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3644
3645 /*
3646 * Free each page after tx, so the only ref left is
3647 * held by the network stack
3648 */
3649 for (; i > 0; i--)
3650 put_page(pages[i-1]);
3651
08a22b39
AK		 3652 /*
3653 * Acl update can result in inode attribute update.
3654 * so mark the attribute cache invalid.
3655 */
3656 spin_lock(&inode->i_lock);
3657 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3658 spin_unlock(&inode->i_lock);
f41f7418
TM		 3659 nfs_access_zap_cache(inode);
3660 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3661 return ret;
3662}
3663
16b4289c
TM		 3664static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3665{
3666 struct nfs4_exception exception = { };
3667 int err;
3668 do {
3669 err = nfs4_handle_exception(NFS_SERVER(inode),
3670 __nfs4_proc_set_acl(inode, buf, buflen),
3671 &exception);
3672 } while (exception.retry);
3673 return err;
3674}
3675
1da177e4 3676static int
aa5190d0 3677nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3678{
aa5190d0
TM		 3679 struct nfs_client *clp = server->nfs_client;
3680
3681 if (task->tk_status >= 0)
1da177e4
LT		 3682 return 0;
3683 switch(task->tk_status) {
9e33bed5
TM		 3684 case -NFS4ERR_ADMIN_REVOKED:
3685 case -NFS4ERR_BAD_STATEID:
3686 case -NFS4ERR_OPENMODE:
3687 if (state == NULL)
3688 break;
0400a6b0
TM		 3689 nfs4_schedule_stateid_recovery(server, state);
3690 goto wait_on_recovery;
0ced63d1
TM		 3691 case -NFS4ERR_EXPIRED:
3692 if (state != NULL)
3693 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3694 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3695 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3696 nfs4_schedule_lease_recovery(clp);
3697 goto wait_on_recovery;
4745e315
AA		 3698#if defined(CONFIG_NFS_V4_1)
3699 case -NFS4ERR_BADSESSION:
3700 case -NFS4ERR_BADSLOT:
3701 case -NFS4ERR_BAD_HIGH_SLOT:
3702 case -NFS4ERR_DEADSESSION:
3703 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3704 case -NFS4ERR_SEQ_FALSE_RETRY:
3705 case -NFS4ERR_SEQ_MISORDERED:
3706 dprintk("%s ERROR %d, Reset session\n", __func__,
3707 task->tk_status);
0400a6b0 3708 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3709 task->tk_status = 0;
3710 return -EAGAIN;
3711#endif /* CONFIG_NFS_V4_1 */
1da177e4 3712 case -NFS4ERR_DELAY:
aa5190d0 3713 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3714 case -NFS4ERR_GRACE:
2c643488 3715 case -EKEYEXPIRED:
1da177e4
LT		 3716 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3717 task->tk_status = 0;
3718 return -EAGAIN;
a8a4ae3a 3719 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3720 case -NFS4ERR_OLD_STATEID:
3721 task->tk_status = 0;
3722 return -EAGAIN;
3723 }
3724 task->tk_status = nfs4_map_errors(task->tk_status);
3725 return 0;
0400a6b0 3726wait_on_recovery:
a2c0b9e2 3727 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3728 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3729 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3730 task->tk_status = 0;
3731 return -EAGAIN;
1da177e4
LT		 3732}
3733
bb8b27e5
TM		 3734int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3735 unsigned short port, struct rpc_cred *cred,
3736 struct nfs4_setclientid_res *res)
1da177e4
LT		 3737{
3738 nfs4_verifier sc_verifier;
3739 struct nfs4_setclientid setclientid = {
3740 .sc_verifier = &sc_verifier,
3741 .sc_prog = program,
f4eecd5d 3742 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3743 };
3744 struct rpc_message msg = {
3745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3746 .rpc_argp = &setclientid,
bb8b27e5 3747 .rpc_resp = res,
286d7d6a 3748 .rpc_cred = cred,
1da177e4 3749 };
bc4785cd 3750 __be32 *p;
1da177e4
LT		 3751 int loop = 0;
3752 int status;
3753
bc4785cd 3754 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3755 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3756 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3757
3758 for(;;) {
3759 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3760 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3761 clp->cl_ipaddr,
3762 rpc_peeraddr2str(clp->cl_rpcclient,
3763 RPC_DISPLAY_ADDR),
69dd716c
TM		 3764 rpc_peeraddr2str(clp->cl_rpcclient,
3765 RPC_DISPLAY_PROTO),
78ea323b 3766 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3767 clp->cl_id_uniquifier);
3768 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3769 sizeof(setclientid.sc_netid),
3770 rpc_peeraddr2str(clp->cl_rpcclient,
3771 RPC_DISPLAY_NETID));
1da177e4 3772 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3773 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3774 clp->cl_ipaddr, port >> 8, port & 255);
3775
1bd714f2 3776 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3777 if (status != -NFS4ERR_CLID_INUSE)
3778 break;
fd954ae1
TM		 3779 if (loop != 0) {
3780 ++clp->cl_id_uniquifier;
1da177e4 3781 break;
fd954ae1
TM		 3782 }
3783 ++loop;
3784 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3785 }
3786 return status;
3787}
3788
fd954ae1 3789int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3790 struct nfs4_setclientid_res *arg,
3791 struct rpc_cred *cred)
1da177e4
LT		 3792{
3793 struct nfs_fsinfo fsinfo;
3794 struct rpc_message msg = {
3795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3796 .rpc_argp = arg,
1da177e4 3797 .rpc_resp = &fsinfo,
286d7d6a 3798 .rpc_cred = cred,
1da177e4
LT		 3799 };
3800 unsigned long now;
3801 int status;
3802
3803 now = jiffies;
1bd714f2 3804 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3805 if (status == 0) {
3806 spin_lock(&clp->cl_lock);
3807 clp->cl_lease_time = fsinfo.lease_time * HZ;
3808 clp->cl_last_renewal = now;
3809 spin_unlock(&clp->cl_lock);
3810 }
3811 return status;
3812}
3813
fe650407
TM		 3814struct nfs4_delegreturndata {
3815 struct nfs4_delegreturnargs args;
fa178f29 3816 struct nfs4_delegreturnres res;
fe650407
TM		 3817 struct nfs_fh fh;
3818 nfs4_stateid stateid;
26e976a8 3819 unsigned long timestamp;
fa178f29 3820 struct nfs_fattr fattr;
fe650407
TM		 3821 int rpc_status;
3822};
3823
fe650407
TM		 3824static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3825{
3826 struct nfs4_delegreturndata *data = calldata;
938e1010 3827
14516c3a
TM		 3828 if (!nfs4_sequence_done(task, &data->res.seq_res))
3829 return;
938e1010 3830
79708861
RL		 3831 switch (task->tk_status) {
3832 case -NFS4ERR_STALE_STATEID:
3833 case -NFS4ERR_EXPIRED:
3834 case 0:
fa178f29 3835 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3836 break;
3837 default:
3838 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3839 -EAGAIN) {
d00c5d43 3840 rpc_restart_call_prepare(task);
79708861
RL		 3841 return;
3842 }
3843 }
3844 data->rpc_status = task->tk_status;
fe650407
TM		 3845}
3846
3847static void nfs4_delegreturn_release(void *calldata)
3848{
fe650407
TM		 3849 kfree(calldata);
3850}
3851
938e1010
AA		 3852#if defined(CONFIG_NFS_V4_1)
3853static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3854{
3855 struct nfs4_delegreturndata *d_data;
3856
3857 d_data = (struct nfs4_delegreturndata *)data;
3858
035168ab 3859 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3860 &d_data->args.seq_args,
3861 &d_data->res.seq_res, 1, task))
3862 return;
3863 rpc_call_start(task);
3864}
3865#endif /* CONFIG_NFS_V4_1 */
3866
c8d149f3 3867static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3868#if defined(CONFIG_NFS_V4_1)
3869 .rpc_call_prepare = nfs4_delegreturn_prepare,
3870#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3871 .rpc_call_done = nfs4_delegreturn_done,
3872 .rpc_release = nfs4_delegreturn_release,
3873};
3874
e6f81075 3875static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3876{
3877 struct nfs4_delegreturndata *data;
fa178f29 3878 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3879 struct rpc_task *task;
5138fde0
TM		 3880 struct rpc_message msg = {
3881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3882 .rpc_cred = cred,
3883 };
c970aa85
TM		 3884 struct rpc_task_setup task_setup_data = {
3885 .rpc_client = server->client,
5138fde0 3886 .rpc_message = &msg,
c970aa85
TM		 3887 .callback_ops = &nfs4_delegreturn_ops,
3888 .flags = RPC_TASK_ASYNC,
3889 };
e6f81075 3890 int status = 0;
fe650407 3891
8535b2be 3892 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3893 if (data == NULL)
3894 return -ENOMEM;
3895 data->args.fhandle = &data->fh;
3896 data->args.stateid = &data->stateid;
fa178f29 3897 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3898 nfs_copy_fh(&data->fh, NFS_FH(inode));
3899 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3900 data->res.fattr = &data->fattr;
3901 data->res.server = server;
5138fde0 3902 nfs_fattr_init(data->res.fattr);
26e976a8 3903 data->timestamp = jiffies;
fe650407
TM		 3904 data->rpc_status = 0;
3905
c970aa85 3906 task_setup_data.callback_data = data;
1174dd1f
TM		 3907 msg.rpc_argp = &data->args;
3908 msg.rpc_resp = &data->res;
c970aa85 3909 task = rpc_run_task(&task_setup_data);
7a1218a2 3910 if (IS_ERR(task))
fe650407 3911 return PTR_ERR(task);
e6f81075
TM		 3912 if (!issync)
3913 goto out;
fe650407 3914 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3915 if (status != 0)
3916 goto out;
3917 status = data->rpc_status;
3918 if (status != 0)
3919 goto out;
3920 nfs_refresh_inode(inode, &data->fattr);
3921out:
e6b3c4db 3922 rpc_put_task(task);
fe650407 3923 return status;
1da177e4
LT		 3924}
3925
e6f81075 3926int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3927{
3928 struct nfs_server *server = NFS_SERVER(inode);
3929 struct nfs4_exception exception = { };
3930 int err;
3931 do {
e6f81075 3932 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3933 switch (err) {
3934 case -NFS4ERR_STALE_STATEID:
3935 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3936 case 0:
3937 return 0;
3938 }
3939 err = nfs4_handle_exception(server, err, &exception);
3940 } while (exception.retry);
3941 return err;
3942}
3943
3944#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3945#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3946
3947/*
3948 * sleep, with exponential backoff, and retry the LOCK operation.
3949 */
3950static unsigned long
3951nfs4_set_lock_task_retry(unsigned long timeout)
3952{
150030b7 3953 schedule_timeout_killable(timeout);
1da177e4
LT		 3954 timeout <<= 1;
3955 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3956 return NFS4_LOCK_MAXTIMEOUT;
3957 return timeout;
3958}
3959
1da177e4
LT		 3960static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3961{
3962 struct inode *inode = state->inode;
3963 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3964 struct nfs_client *clp = server->nfs_client;
911d1aaf 3965 struct nfs_lockt_args arg = {
1da177e4 3966 .fh = NFS_FH(inode),
911d1aaf 3967 .fl = request,
1da177e4 3968 };
911d1aaf
TM		 3969 struct nfs_lockt_res res = {
3970 .denied = request,
1da177e4
LT		 3971 };
3972 struct rpc_message msg = {
3973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3974 .rpc_argp = &arg,
3975 .rpc_resp = &res,
3976 .rpc_cred = state->owner->so_cred,
3977 };
1da177e4
LT		 3978 struct nfs4_lock_state *lsp;
3979 int status;
3980
911d1aaf 3981 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3982 status = nfs4_set_lock_state(state, request);
3983 if (status != 0)
3984 goto out;
3985 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3986 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3987 arg.lock_owner.s_dev = server->s_dev;
7c513058 3988 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 3989 switch (status) {
3990 case 0:
3991 request->fl_type = F_UNLCK;
3992 break;
3993 case -NFS4ERR_DENIED:
3994 status = 0;
1da177e4 3995 }
70cc6487 3996 request->fl_ops->fl_release_private(request);
8d0a8a9d 3997out:
1da177e4
LT		 3998 return status;
3999}
4000
4001static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4002{
4003 struct nfs4_exception exception = { };
4004 int err;
4005
4006 do {
4007 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4008 _nfs4_proc_getlk(state, cmd, request),
4009 &exception);
4010 } while (exception.retry);
4011 return err;
4012}
4013
4014static int do_vfs_lock(struct file *file, struct file_lock *fl)
4015{
4016 int res = 0;
4017 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4018 case FL_POSIX:
4019 res = posix_lock_file_wait(file, fl);
4020 break;
4021 case FL_FLOCK:
4022 res = flock_lock_file_wait(file, fl);
4023 break;
4024 default:
4025 BUG();
4026 }
1da177e4
LT		 4027 return res;
4028}
4029
faf5f49c 4030struct nfs4_unlockdata {
911d1aaf
TM		 4031 struct nfs_locku_args arg;
4032 struct nfs_locku_res res;
faf5f49c
TM		 4033 struct nfs4_lock_state *lsp;
4034 struct nfs_open_context *ctx;
911d1aaf
TM		 4035 struct file_lock fl;
4036 const struct nfs_server *server;
26e976a8 4037 unsigned long timestamp;
faf5f49c
TM		 4038};
4039
911d1aaf
TM		 4040static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4041 struct nfs_open_context *ctx,
4042 struct nfs4_lock_state *lsp,
4043 struct nfs_seqid *seqid)
4044{
4045 struct nfs4_unlockdata *p;
4046 struct inode *inode = lsp->ls_state->inode;
4047
8535b2be 4048 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4049 if (p == NULL)
4050 return NULL;
4051 p->arg.fh = NFS_FH(inode);
4052 p->arg.fl = &p->fl;
4053 p->arg.seqid = seqid;
c1d51931 4054 p->res.seqid = seqid;
911d1aaf
TM		 4055 p->arg.stateid = &lsp->ls_stateid;
4056 p->lsp = lsp;
4057 atomic_inc(&lsp->ls_count);
4058 /* Ensure we don't close file until we're done freeing locks! */
4059 p->ctx = get_nfs_open_context(ctx);
4060 memcpy(&p->fl, fl, sizeof(p->fl));
4061 p->server = NFS_SERVER(inode);
4062 return p;
4063}
4064
06f814a3 4065static void nfs4_locku_release_calldata(void *data)
faf5f49c 4066{
963d8fe5 4067 struct nfs4_unlockdata *calldata = data;
911d1aaf 4068 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4069 nfs4_put_lock_state(calldata->lsp);
4070 put_nfs_open_context(calldata->ctx);
4071 kfree(calldata);
faf5f49c
TM		 4072}
4073
963d8fe5 4074static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4075{
963d8fe5 4076 struct nfs4_unlockdata *calldata = data;
faf5f49c 4077
14516c3a
TM		 4078 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4079 return;
faf5f49c
TM		 4080 switch (task->tk_status) {
4081 case 0:
4082 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4083 calldata->res.stateid.data,
faf5f49c 4084 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4085 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4086 break;
9e33bed5
TM		 4087 case -NFS4ERR_BAD_STATEID:
4088 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4089 case -NFS4ERR_STALE_STATEID:
4090 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4091 break;
4092 default:
9e33bed5 4093 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4094 rpc_restart_call_prepare(task);
faf5f49c 4095 }
faf5f49c
TM		 4096}
4097
4ce70ada 4098static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4099{
4ce70ada 4100 struct nfs4_unlockdata *calldata = data;
faf5f49c 4101
911d1aaf 4102 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4103 return;
4104 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4105 /* Note: exit _without_ running nfs4_locku_done */
4106 task->tk_action = NULL;
faf5f49c
TM		 4107 return;
4108 }
26e976a8 4109 calldata->timestamp = jiffies;
035168ab 4110 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4111 &calldata->arg.seq_args,
4112 &calldata->res.seq_res, 1, task))
4113 return;
5138fde0 4114 rpc_call_start(task);
faf5f49c
TM		 4115}
4116
963d8fe5 4117static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4118 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4119 .rpc_call_done = nfs4_locku_done,
06f814a3 4120 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4121};
4122
a5d16a4d
TM		 4123static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4124 struct nfs_open_context *ctx,
4125 struct nfs4_lock_state *lsp,
4126 struct nfs_seqid *seqid)
4127{
4128 struct nfs4_unlockdata *data;
5138fde0
TM		 4129 struct rpc_message msg = {
4130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4131 .rpc_cred = ctx->cred,
4132 };
c970aa85
TM		 4133 struct rpc_task_setup task_setup_data = {
4134 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4135 .rpc_message = &msg,
c970aa85 4136 .callback_ops = &nfs4_locku_ops,
101070ca 4137 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4138 .flags = RPC_TASK_ASYNC,
4139 };
a5d16a4d 4140
137d6aca
FF		 4141 /* Ensure this is an unlock - when canceling a lock, the
4142 * canceled lock is passed in, and it won't be an unlock.
4143 */
4144 fl->fl_type = F_UNLCK;
4145
a5d16a4d
TM		 4146 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4147 if (data == NULL) {
4148 nfs_free_seqid(seqid);
4149 return ERR_PTR(-ENOMEM);
4150 }
4151
1174dd1f
TM		 4152 msg.rpc_argp = &data->arg;
4153 msg.rpc_resp = &data->res;
c970aa85
TM		 4154 task_setup_data.callback_data = data;
4155 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4156}
4157
faf5f49c
TM		 4158static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4159{
19e03c57 4160 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4161 struct nfs_seqid *seqid;
1da177e4 4162 struct nfs4_lock_state *lsp;
06f814a3
TM		 4163 struct rpc_task *task;
4164 int status = 0;
536ff0f8 4165 unsigned char fl_flags = request->fl_flags;
faf5f49c 4166
8d0a8a9d 4167 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4168 /* Unlock _before_ we do the RPC call */
4169 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4170 down_read(&nfsi->rwsem);
4171 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4172 up_read(&nfsi->rwsem);
9b073574 4173 goto out;
19e03c57
TM		 4174 }
4175 up_read(&nfsi->rwsem);
8d0a8a9d 4176 if (status != 0)
9b073574
TM		 4177 goto out;
4178 /* Is this a delegated lock? */
4179 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4180 goto out;
8d0a8a9d 4181 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4182 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4183 status = -ENOMEM;
911d1aaf 4184 if (seqid == NULL)
9b073574 4185 goto out;
cd3758e3 4186 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4187 status = PTR_ERR(task);
4188 if (IS_ERR(task))
9b073574 4189 goto out;
a5d16a4d 4190 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4191 rpc_put_task(task);
9b073574 4192out:
536ff0f8 4193 request->fl_flags = fl_flags;
1da177e4
LT		 4194 return status;
4195}
4196
a5d16a4d
TM		 4197struct nfs4_lockdata {
4198 struct nfs_lock_args arg;
4199 struct nfs_lock_res res;
4200 struct nfs4_lock_state *lsp;
4201 struct nfs_open_context *ctx;
4202 struct file_lock fl;
26e976a8 4203 unsigned long timestamp;
a5d16a4d
TM		 4204 int rpc_status;
4205 int cancelled;
66179efe 4206 struct nfs_server *server;
a5d16a4d
TM		 4207};
4208
4209static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4210 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4211 gfp_t gfp_mask)
1da177e4 4212{
a5d16a4d
TM		 4213 struct nfs4_lockdata *p;
4214 struct inode *inode = lsp->ls_state->inode;
1da177e4 4215 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4216
8535b2be 4217 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4218 if (p == NULL)
4219 return NULL;
4220
4221 p->arg.fh = NFS_FH(inode);
4222 p->arg.fl = &p->fl;
8535b2be 4223 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4224 if (p->arg.open_seqid == NULL)
4225 goto out_free;
8535b2be 4226 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4227 if (p->arg.lock_seqid == NULL)
2f74c0a0 4228 goto out_free_seqid;
a5d16a4d 4229 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4230 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4231 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4232 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4233 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4234 p->lsp = lsp;
66179efe 4235 p->server = server;
a5d16a4d
TM		 4236 atomic_inc(&lsp->ls_count);
4237 p->ctx = get_nfs_open_context(ctx);
4238 memcpy(&p->fl, fl, sizeof(p->fl));
4239 return p;
2f74c0a0
TM		 4240out_free_seqid:
4241 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4242out_free:
4243 kfree(p);
4244 return NULL;
4245}
4246
4247static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4248{
4249 struct nfs4_lockdata *data = calldata;
4250 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4251
3110ff80 4252 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4253 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4254 return;
a5d16a4d
TM		 4255 /* Do we need to do an open_to_lock_owner? */
4256 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4257 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4258 return;
a5d16a4d
TM		 4259 data->arg.open_stateid = &state->stateid;
4260 data->arg.new_lock_owner = 1;
c1d51931 4261 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4262 } else
4263 data->arg.new_lock_owner = 0;
26e976a8 4264 data->timestamp = jiffies;
035168ab
TM		 4265 if (nfs4_setup_sequence(data->server,
4266 &data->arg.seq_args,
66179efe
AA		 4267 &data->res.seq_res, 1, task))
4268 return;
5138fde0 4269 rpc_call_start(task);
3110ff80 4270 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4271}
4272
b257957e
AB		 4273static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4274{
4275 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4276 nfs4_lock_prepare(task, calldata);
4277}
4278
a5d16a4d
TM		 4279static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4280{
4281 struct nfs4_lockdata *data = calldata;
4282
3110ff80 4283 dprintk("%s: begin!\n", __func__);
a5d16a4d 4284
14516c3a
TM		 4285 if (!nfs4_sequence_done(task, &data->res.seq_res))
4286 return;
66179efe 4287
a5d16a4d 4288 data->rpc_status = task->tk_status;
a5d16a4d 4289 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4290 if (data->rpc_status == 0)
4291 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4292 else
4293 goto out;
4294 }
4295 if (data->rpc_status == 0) {
4296 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4297 sizeof(data->lsp->ls_stateid.data));
4298 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4299 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4300 }
a5d16a4d 4301out:
3110ff80 4302 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4303}
4304
4305static void nfs4_lock_release(void *calldata)
4306{
4307 struct nfs4_lockdata *data = calldata;
4308
3110ff80 4309 dprintk("%s: begin!\n", __func__);
2f74c0a0 4310 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4311 if (data->cancelled != 0) {
4312 struct rpc_task *task;
4313 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4314 data->arg.lock_seqid);
4315 if (!IS_ERR(task))
bf294b41 4316 rpc_put_task_async(task);
3110ff80 4317 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4318 } else
4319 nfs_free_seqid(data->arg.lock_seqid);
4320 nfs4_put_lock_state(data->lsp);
4321 put_nfs_open_context(data->ctx);
4322 kfree(data);
3110ff80 4323 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4324}
4325
4326static const struct rpc_call_ops nfs4_lock_ops = {
4327 .rpc_call_prepare = nfs4_lock_prepare,
4328 .rpc_call_done = nfs4_lock_done,
4329 .rpc_release = nfs4_lock_release,
4330};
4331
b257957e
AB		 4332static const struct rpc_call_ops nfs4_recover_lock_ops = {
4333 .rpc_call_prepare = nfs4_recover_lock_prepare,
4334 .rpc_call_done = nfs4_lock_done,
4335 .rpc_release = nfs4_lock_release,
4336};
4337
2bee72a6
TM		 4338static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4339{
2bee72a6
TM		 4340 switch (error) {
4341 case -NFS4ERR_ADMIN_REVOKED:
4342 case -NFS4ERR_BAD_STATEID:
ecac799a 4343 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4344 if (new_lock_owner != 0 ||
4345 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4346 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4347 break;
4348 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4349 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4350 case -NFS4ERR_EXPIRED:
4351 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4352 };
4353}
4354
afe6c27c 4355static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4356{
4357 struct nfs4_lockdata *data;
4358 struct rpc_task *task;
5138fde0
TM		 4359 struct rpc_message msg = {
4360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4361 .rpc_cred = state->owner->so_cred,
4362 };
c970aa85
TM		 4363 struct rpc_task_setup task_setup_data = {
4364 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4365 .rpc_message = &msg,
c970aa85 4366 .callback_ops = &nfs4_lock_ops,
101070ca 4367 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4368 .flags = RPC_TASK_ASYNC,
4369 };
a5d16a4d
TM		 4370 int ret;
4371
3110ff80 4372 dprintk("%s: begin!\n", __func__);
cd3758e3 4373 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4374 fl->fl_u.nfs4_fl.owner,
4375 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4376 if (data == NULL)
4377 return -ENOMEM;
4378 if (IS_SETLKW(cmd))
4379 data->arg.block = 1;
b257957e
AB		 4380 if (recovery_type > NFS_LOCK_NEW) {
4381 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4382 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4383 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4384 }
1174dd1f
TM		 4385 msg.rpc_argp = &data->arg;
4386 msg.rpc_resp = &data->res;
c970aa85
TM		 4387 task_setup_data.callback_data = data;
4388 task = rpc_run_task(&task_setup_data);
7a1218a2 4389 if (IS_ERR(task))
a5d16a4d 4390 return PTR_ERR(task);
a5d16a4d
TM		 4391 ret = nfs4_wait_for_completion_rpc_task(task);
4392 if (ret == 0) {
4393 ret = data->rpc_status;
2bee72a6
TM		 4394 if (ret)
4395 nfs4_handle_setlk_error(data->server, data->lsp,
4396 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4397 } else
4398 data->cancelled = 1;
e6b3c4db 4399 rpc_put_task(task);
3110ff80 4400 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4401 return ret;
1da177e4
LT		 4402}
4403
4404static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4405{
202b50dc
TM		 4406 struct nfs_server *server = NFS_SERVER(state->inode);
4407 struct nfs4_exception exception = { };
4408 int err;
4409
4410 do {
42a2d13e
TM		 4411 /* Cache the lock if possible... */
4412 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4413 return 0;
afe6c27c 4414 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4415 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4416 break;
4417 nfs4_handle_exception(server, err, &exception);
4418 } while (exception.retry);
4419 return err;
1da177e4
LT		 4420}
4421
4422static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4423{
202b50dc
TM		 4424 struct nfs_server *server = NFS_SERVER(state->inode);
4425 struct nfs4_exception exception = { };
4426 int err;
4427
6bfc93ef
TM		 4428 err = nfs4_set_lock_state(state, request);
4429 if (err != 0)
4430 return err;
202b50dc 4431 do {
42a2d13e
TM		 4432 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4433 return 0;
afe6c27c 4434 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4435 switch (err) {
4436 default:
4437 goto out;
4438 case -NFS4ERR_GRACE:
4439 case -NFS4ERR_DELAY:
4440 nfs4_handle_exception(server, err, &exception);
4441 err = 0;
4442 }
202b50dc 4443 } while (exception.retry);
a9ed2e25 4444out:
202b50dc 4445 return err;
1da177e4
LT		 4446}
4447
f062eb6c
BS		 4448#if defined(CONFIG_NFS_V4_1)
4449static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4450{
4451 int status;
4452 struct nfs_server *server = NFS_SERVER(state->inode);
4453
4454 status = nfs41_test_stateid(server, state);
4455 if (status == NFS_OK)
4456 return 0;
4457 nfs41_free_stateid(server, state);
4458 return nfs4_lock_expired(state, request);
4459}
4460#endif
4461
1da177e4
LT		 4462static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4463{
19e03c57 4464 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4465 unsigned char fl_flags = request->fl_flags;
8e469ebd 4466 int status = -ENOLCK;
1da177e4 4467
8e469ebd
TM		 4468 if ((fl_flags & FL_POSIX) &&
4469 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4470 goto out;
6bfc93ef 4471 /* Is this a delegated open? */
6bfc93ef
TM		 4472 status = nfs4_set_lock_state(state, request);
4473 if (status != 0)
4474 goto out;
01c3b861
TM		 4475 request->fl_flags |= FL_ACCESS;
4476 status = do_vfs_lock(request->fl_file, request);
4477 if (status < 0)
4478 goto out;
19e03c57 4479 down_read(&nfsi->rwsem);
01c3b861 4480 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4481 /* Yes: cache locks! */
01c3b861 4482 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4483 request->fl_flags = fl_flags & ~FL_SLEEP;
4484 status = do_vfs_lock(request->fl_file, request);
4485 goto out_unlock;
01c3b861 4486 }
afe6c27c 4487 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4488 if (status != 0)
01c3b861 4489 goto out_unlock;
6bfc93ef 4490 /* Note: we always want to sleep here! */
01c3b861 4491 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4492 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4493 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4494out_unlock:
19e03c57 4495 up_read(&nfsi->rwsem);
01c3b861
TM		 4496out:
4497 request->fl_flags = fl_flags;
1da177e4
LT		 4498 return status;
4499}
4500
4501static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4502{
4503 struct nfs4_exception exception = { };
4504 int err;
4505
4506 do {
965b5d67
TM		 4507 err = _nfs4_proc_setlk(state, cmd, request);
4508 if (err == -NFS4ERR_DENIED)
4509 err = -EAGAIN;
1da177e4 4510 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4511 err, &exception);
1da177e4
LT		 4512 } while (exception.retry);
4513 return err;
4514}
4515
4516static int
4517nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4518{
4519 struct nfs_open_context *ctx;
4520 struct nfs4_state *state;
4521 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4522 int status;
4523
4524 /* verify open state */
cd3758e3 4525 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4526 state = ctx->state;
4527
4528 if (request->fl_start < 0 || request->fl_end < 0)
4529 return -EINVAL;
4530
d953126a
TM		 4531 if (IS_GETLK(cmd)) {
4532 if (state != NULL)
4533 return nfs4_proc_getlk(state, F_GETLK, request);
4534 return 0;
4535 }
1da177e4
LT		 4536
4537 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4538 return -EINVAL;
4539
d953126a
TM		 4540 if (request->fl_type == F_UNLCK) {
4541 if (state != NULL)
4542 return nfs4_proc_unlck(state, cmd, request);
4543 return 0;
4544 }
1da177e4 4545
d953126a
TM		 4546 if (state == NULL)
4547 return -ENOLCK;
1da177e4
LT		 4548 do {
4549 status = nfs4_proc_setlk(state, cmd, request);
4550 if ((status != -EAGAIN) || IS_SETLK(cmd))
4551 break;
4552 timeout = nfs4_set_lock_task_retry(timeout);
4553 status = -ERESTARTSYS;
4554 if (signalled())
4555 break;
4556 } while(status < 0);
1da177e4
LT		 4557 return status;
4558}
4559
888e694c
TM		 4560int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4561{
4562 struct nfs_server *server = NFS_SERVER(state->inode);
4563 struct nfs4_exception exception = { };
4564 int err;
4565
4566 err = nfs4_set_lock_state(state, fl);
4567 if (err != 0)
4568 goto out;
4569 do {
afe6c27c 4570 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4571 switch (err) {
4572 default:
4573 printk(KERN_ERR "%s: unhandled error %d.\n",
4574 __func__, err);
4575 case 0:
965b5d67 4576 case -ESTALE:
d5122201
TM		 4577 goto out;
4578 case -NFS4ERR_EXPIRED:
0ced63d1 4579 nfs4_schedule_stateid_recovery(server, state);
d5122201 4580 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4581 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4582 nfs4_schedule_lease_recovery(server->nfs_client);
4583 goto out;
74e7bb73
RL		 4584 case -NFS4ERR_BADSESSION:
4585 case -NFS4ERR_BADSLOT:
4586 case -NFS4ERR_BAD_HIGH_SLOT:
4587 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4588 case -NFS4ERR_DEADSESSION:
0400a6b0 4589 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4590 goto out;
965b5d67
TM		 4591 case -ERESTARTSYS:
4592 /*
4593 * The show must go on: exit, but mark the
4594 * stateid as needing recovery.
4595 */
4596 case -NFS4ERR_ADMIN_REVOKED:
4597 case -NFS4ERR_BAD_STATEID:
4598 case -NFS4ERR_OPENMODE:
0400a6b0 4599 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4600 err = 0;
4601 goto out;
168667c4
TM		 4602 case -EKEYEXPIRED:
4603 /*
4604 * User RPCSEC_GSS context has expired.
4605 * We cannot recover this stateid now, so
4606 * skip it and allow recovery thread to
4607 * proceed.
4608 */
4609 err = 0;
4610 goto out;
965b5d67
TM		 4611 case -ENOMEM:
4612 case -NFS4ERR_DENIED:
4613 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4614 err = 0;
4615 goto out;
d5122201
TM		 4616 case -NFS4ERR_DELAY:
4617 break;
4618 }
888e694c
TM		 4619 err = nfs4_handle_exception(server, err, &exception);
4620 } while (exception.retry);
4621out:
4622 return err;
4623}
6b3b5496 4624
d3c7b7cc
TM		 4625static void nfs4_release_lockowner_release(void *calldata)
4626{
4627 kfree(calldata);
4628}
4629
4630const struct rpc_call_ops nfs4_release_lockowner_ops = {
4631 .rpc_release = nfs4_release_lockowner_release,
4632};
4633
4634void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4635{
4636 struct nfs_server *server = lsp->ls_state->owner->so_server;
4637 struct nfs_release_lockowner_args *args;
4638 struct rpc_message msg = {
4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4640 };
4641
4642 if (server->nfs_client->cl_mvops->minor_version != 0)
4643 return;
4644 args = kmalloc(sizeof(*args), GFP_NOFS);
4645 if (!args)
4646 return;
4647 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4648 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4649 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4650 msg.rpc_argp = args;
4651 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4652}
4653
aa1870af
BF		 4654#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4655
64c2ce8b
AK		 4656static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4657 const void *buf, size_t buflen,
4658 int flags, int type)
6b3b5496 4659{
64c2ce8b
AK		 4660 if (strcmp(key, "") != 0)
4661 return -EINVAL;
4b580ee3 4662
64c2ce8b 4663 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4664}
4665
64c2ce8b
AK		 4666static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4667 void *buf, size_t buflen, int type)
6b3b5496 4668{
64c2ce8b
AK		 4669 if (strcmp(key, "") != 0)
4670 return -EINVAL;
aa1870af 4671
64c2ce8b 4672 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4673}
4674
64c2ce8b
AK		 4675static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4676 size_t list_len, const char *name,
4677 size_t name_len, int type)
6b3b5496 4678{
64c2ce8b 4679 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4680
096455a2
BF		 4681 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4682 return 0;
64c2ce8b
AK		 4683
4684 if (list && len <= list_len)
4685 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4686 return len;
6b3b5496
BF		 4687}
4688
533eb461
AA		 4689/*
4690 * nfs_fhget will use either the mounted_on_fileid or the fileid
4691 */
69aaaae1
TM		 4692static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4693{
533eb461
AA		 4694 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4695 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4696 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4697 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
69aaaae1
TM		 4698 return;
4699
4700 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4701 NFS_ATTR_FATTR_NLINK;
4702 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4703 fattr->nlink = 2;
4704}
4705
56659e99 4706int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4707 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4708{
4709 struct nfs_server *server = NFS_SERVER(dir);
4710 u32 bitmask[2] = {
361e624f 4711 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4712 };
4713 struct nfs4_fs_locations_arg args = {
4714 .dir_fh = NFS_FH(dir),
c228fd3a 4715 .name = name,
683b57b4
TM		 4716 .page = page,
4717 .bitmask = bitmask,
4718 };
22958463
BH		 4719 struct nfs4_fs_locations_res res = {
4720 .fs_locations = fs_locations,
4721 };
683b57b4
TM		 4722 struct rpc_message msg = {
4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4724 .rpc_argp = &args,
22958463 4725 .rpc_resp = &res,
683b57b4
TM		 4726 };
4727 int status;
4728
3110ff80 4729 dprintk("%s: start\n", __func__);
533eb461
AA		 4730
4731 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4732 * is not supported */
4733 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4734 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4735 else
4736 bitmask[0] |= FATTR4_WORD0_FILEID;
4737
c228fd3a 4738 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4739 fs_locations->server = server;
830b8e33 4740 fs_locations->nlocations = 0;
7c513058 4741 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4742 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4743 return status;
4744}
4745
5a5ea0d4
BS		 4746static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4747{
4748 int status;
4749 struct nfs4_secinfo_arg args = {
4750 .dir_fh = NFS_FH(dir),
4751 .name = name,
4752 };
4753 struct nfs4_secinfo_res res = {
4754 .flavors = flavors,
4755 };
4756 struct rpc_message msg = {
4757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4758 .rpc_argp = &args,
4759 .rpc_resp = &res,
4760 };
4761
4762 dprintk("NFS call secinfo %s\n", name->name);
4763 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4764 dprintk("NFS reply secinfo: %d\n", status);
4765 return status;
4766}
4767
4768int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4769{
4770 struct nfs4_exception exception = { };
4771 int err;
4772 do {
4773 err = nfs4_handle_exception(NFS_SERVER(dir),
4774 _nfs4_proc_secinfo(dir, name, flavors),
4775 &exception);
4776 } while (exception.retry);
4777 return err;
4778}
4779
557134a3 4780#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4781/*
4782 * Check the exchange flags returned by the server for invalid flags, having
4783 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4784 * DS flags set.
4785 */
4786static int nfs4_check_cl_exchange_flags(u32 flags)
4787{
4788 if (flags & ~EXCHGID4_FLAG_MASK_R)
4789 goto out_inval;
4790 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4791 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4792 goto out_inval;
4793 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4794 goto out_inval;
4795 return NFS_OK;
4796out_inval:
4797 return -NFS4ERR_INVAL;
4798}
4799
78fe0f41
WAA		 4800static bool
4801nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4802{
4803 if (a->server_scope_sz == b->server_scope_sz &&
4804 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4805 return true;
4806
4807 return false;
4808}
4809
99fe60d0
BH		 4810/*
4811 * nfs4_proc_exchange_id()
4812 *
4813 * Since the clientid has expired, all compounds using sessions
4814 * associated with the stale clientid will be returning
4815 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4816 * be in some phase of session reset.
4817 */
4d643d1d 4818int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4819{
4820 nfs4_verifier verifier;
4821 struct nfs41_exchange_id_args args = {
4822 .client = clp,
357f54d6 4823 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4824 };
4825 struct nfs41_exchange_id_res res = {
4826 .client = clp,
4827 };
4828 int status;
4829 struct rpc_message msg = {
4830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4831 .rpc_argp = &args,
4832 .rpc_resp = &res,
4833 .rpc_cred = cred,
4834 };
4835 __be32 *p;
4836
4837 dprintk("--> %s\n", __func__);
4838 BUG_ON(clp == NULL);
a7b72103 4839
99fe60d0
BH		 4840 p = (u32 *)verifier.data;
4841 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4842 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4843 args.verifier = &verifier;
4844
c7a360b0
AA		 4845 args.id_len = scnprintf(args.id, sizeof(args.id),
4846 "%s/%s.%s/%u",
4847 clp->cl_ipaddr,
4848 init_utsname()->nodename,
4849 init_utsname()->domainname,
4850 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4851
78fe0f41
WAA		 4852 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4853 if (unlikely(!res.server_scope))
4854 return -ENOMEM;
4855
1bd714f2 4856 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4857 if (!status)
4858 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41
WAA		 4859
4860 if (!status) {
4861 if (clp->server_scope &&
4862 !nfs41_same_server_scope(clp->server_scope,
4863 res.server_scope)) {
4864 dprintk("%s: server_scope mismatch detected\n",
4865 __func__);
4866 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4867 kfree(clp->server_scope);
4868 clp->server_scope = NULL;
4869 }
4870
4871 if (!clp->server_scope)
4872 clp->server_scope = res.server_scope;
4873 else
4874 kfree(res.server_scope);
4875 }
4876
99fe60d0
BH		 4877 dprintk("<-- %s status= %d\n", __func__, status);
4878 return status;
4879}
4880
2050f0cc
AA		 4881struct nfs4_get_lease_time_data {
4882 struct nfs4_get_lease_time_args *args;
4883 struct nfs4_get_lease_time_res *res;
4884 struct nfs_client *clp;
4885};
4886
4887static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4888 void *calldata)
4889{
4890 int ret;
4891 struct nfs4_get_lease_time_data *data =
4892 (struct nfs4_get_lease_time_data *)calldata;
4893
4894 dprintk("--> %s\n", __func__);
689cf5c1 4895 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4896 /* just setup sequence, do not trigger session recovery
4897 since we're invoked within one */
4898 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4899 &data->args->la_seq_args,
4900 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4901
4902 BUG_ON(ret == -EAGAIN);
4903 rpc_call_start(task);
4904 dprintk("<-- %s\n", __func__);
4905}
4906
4907/*
4908 * Called from nfs4_state_manager thread for session setup, so don't recover
4909 * from sequence operation or clientid errors.
4910 */
4911static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4912{
4913 struct nfs4_get_lease_time_data *data =
4914 (struct nfs4_get_lease_time_data *)calldata;
4915
4916 dprintk("--> %s\n", __func__);
14516c3a
TM		 4917 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4918 return;
2050f0cc
AA		 4919 switch (task->tk_status) {
4920 case -NFS4ERR_DELAY:
4921 case -NFS4ERR_GRACE:
4922 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4923 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4924 task->tk_status = 0;
a8a4ae3a
AA		 4925 /* fall through */
4926 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 4927 rpc_restart_call_prepare(task);
2050f0cc
AA		 4928 return;
4929 }
2050f0cc
AA		 4930 dprintk("<-- %s\n", __func__);
4931}
4932
4933struct rpc_call_ops nfs4_get_lease_time_ops = {
4934 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4935 .rpc_call_done = nfs4_get_lease_time_done,
4936};
4937
4938int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4939{
4940 struct rpc_task *task;
4941 struct nfs4_get_lease_time_args args;
4942 struct nfs4_get_lease_time_res res = {
4943 .lr_fsinfo = fsinfo,
4944 };
4945 struct nfs4_get_lease_time_data data = {
4946 .args = &args,
4947 .res = &res,
4948 .clp = clp,
4949 };
4950 struct rpc_message msg = {
4951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4952 .rpc_argp = &args,
4953 .rpc_resp = &res,
4954 };
4955 struct rpc_task_setup task_setup = {
4956 .rpc_client = clp->cl_rpcclient,
4957 .rpc_message = &msg,
4958 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 4959 .callback_data = &data,
4960 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 4961 };
4962 int status;
4963
2050f0cc
AA		 4964 dprintk("--> %s\n", __func__);
4965 task = rpc_run_task(&task_setup);
4966
4967 if (IS_ERR(task))
4968 status = PTR_ERR(task);
4969 else {
4970 status = task->tk_status;
4971 rpc_put_task(task);
4972 }
4973 dprintk("<-- %s return %d\n", __func__, status);
4974
4975 return status;
4976}
4977
b73dafa7
RL		 4978/*
4979 * Reset a slot table
4980 */
104aeba4
AA		 4981static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4982 int ivalue)
ac72b7b3 4983{
104aeba4 4984 struct nfs4_slot *new = NULL;
b73dafa7 4985 int i;
ac72b7b3
AA		 4986 int ret = 0;
4987
104aeba4
AA		 4988 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4989 max_reqs, tbl->max_slots);
ac72b7b3 4990
104aeba4
AA		 4991 /* Does the newly negotiated max_reqs match the existing slot table? */
4992 if (max_reqs != tbl->max_slots) {
4993 ret = -ENOMEM;
4994 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4995 GFP_NOFS);
104aeba4
AA		 4996 if (!new)
4997 goto out;
4998 ret = 0;
4999 kfree(tbl->slots);
ac72b7b3
AA		 5000 }
5001 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 5002 if (new) {
5003 tbl->slots = new;
5004 tbl->max_slots = max_reqs;
5005 }
5006 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 5007 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 5008 spin_unlock(&tbl->slot_tbl_lock);
5009 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5010 tbl, tbl->slots, tbl->max_slots);
5011out:
5012 dprintk("<-- %s: return %d\n", __func__, ret);
5013 return ret;
5014}
5015
b73dafa7
RL		 5016/*
5017 * Reset the forechannel and backchannel slot tables
5018 */
5019static int nfs4_reset_slot_tables(struct nfs4_session *session)
5020{
5021 int status;
5022
5023 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 5024 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 5025 if (status)
5026 return status;
5027
5028 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 5029 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 5030 return status;
5031}
5032
f8625a6a
RL		 5033/* Destroy the slot table */
5034static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5035{
5036 if (session->fc_slot_table.slots != NULL) {
5037 kfree(session->fc_slot_table.slots);
5038 session->fc_slot_table.slots = NULL;
5039 }
5040 if (session->bc_slot_table.slots != NULL) {
5041 kfree(session->bc_slot_table.slots);
5042 session->bc_slot_table.slots = NULL;
5043 }
5044 return;
5045}
5046
fc931582
AA		 5047/*
5048 * Initialize slot table
5049 */
050047ce
RL		 5050static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5051 int max_slots, int ivalue)
fc931582 5052{
fc931582
AA		 5053 struct nfs4_slot *slot;
5054 int ret = -ENOMEM;
5055
5056 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5057
050047ce 5058 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 5059
8535b2be 5060 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 5061 if (!slot)
5062 goto out;
fc931582
AA		 5063 ret = 0;
5064
5065 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 5066 tbl->max_slots = max_slots;
5067 tbl->slots = slot;
5068 tbl->highest_used_slotid = -1; /* no slot is currently used */
5069 spin_unlock(&tbl->slot_tbl_lock);
5070 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5071 tbl, tbl->slots, tbl->max_slots);
5072out:
5073 dprintk("<-- %s: return %d\n", __func__, ret);
5074 return ret;
fc931582
AA		 5075}
5076
050047ce
RL		 5077/*
5078 * Initialize the forechannel and backchannel tables
5079 */
5080static int nfs4_init_slot_tables(struct nfs4_session *session)
5081{
f26468fb
TM		 5082 struct nfs4_slot_table *tbl;
5083 int status = 0;
050047ce 5084
f26468fb
TM		 5085 tbl = &session->fc_slot_table;
5086 if (tbl->slots == NULL) {
5087 status = nfs4_init_slot_table(tbl,
5088 session->fc_attrs.max_reqs, 1);
5089 if (status)
5090 return status;
5091 }
050047ce 5092
f26468fb
TM		 5093 tbl = &session->bc_slot_table;
5094 if (tbl->slots == NULL) {
5095 status = nfs4_init_slot_table(tbl,
5096 session->bc_attrs.max_reqs, 0);
5097 if (status)
5098 nfs4_destroy_slot_tables(session);
5099 }
f8625a6a
RL		 5100
5101 return status;
557134a3
AA		 5102}
5103
5104struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5105{
5106 struct nfs4_session *session;
5107 struct nfs4_slot_table *tbl;
5108
8535b2be 5109 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5110 if (!session)
5111 return NULL;
76db6d95 5112
557134a3 5113 tbl = &session->fc_slot_table;
9dfdf404 5114 tbl->highest_used_slotid = -1;
557134a3 5115 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5116 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5117 init_completion(&tbl->complete);
f8625a6a
RL		 5118
5119 tbl = &session->bc_slot_table;
9dfdf404 5120 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5121 spin_lock_init(&tbl->slot_tbl_lock);
5122 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5123 init_completion(&tbl->complete);
f8625a6a 5124
1055d76d
TM		 5125 session->session_state = 1<<NFS4_SESSION_INITING;
5126
557134a3
AA		 5127 session->clp = clp;
5128 return session;
5129}
5130
5131void nfs4_destroy_session(struct nfs4_session *session)
5132{
5a0ffe54
AA		 5133 nfs4_proc_destroy_session(session);
5134 dprintk("%s Destroy backchannel for xprt %p\n",
5135 __func__, session->clp->cl_rpcclient->cl_xprt);
5136 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5137 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5138 nfs4_destroy_slot_tables(session);
557134a3
AA		 5139 kfree(session);
5140}
5141
fc931582
AA		 5142/*
5143 * Initialize the values to be used by the client in CREATE_SESSION
5144 * If nfs4_init_session set the fore channel request and response sizes,
5145 * use them.
5146 *
5147 * Set the back channel max_resp_sz_cached to zero to force the client to
5148 * always set csa_cachethis to FALSE because the current implementation
5149 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5150 */
5151static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5152{
5153 struct nfs4_session *session = args->client->cl_session;
5154 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5155 mxresp_sz = session->fc_attrs.max_resp_sz;
5156
5157 if (mxrqst_sz == 0)
5158 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5159 if (mxresp_sz == 0)
5160 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5161 /* Fore channel attributes */
fc931582
AA		 5162 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5163 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5164 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5165 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5166
5167 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5168 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5169 __func__,
5170 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5171 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5172
5173 /* Back channel attributes */
fc931582
AA		 5174 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5175 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5176 args->bc_attrs.max_resp_sz_cached = 0;
5177 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5178 args->bc_attrs.max_reqs = 1;
5179
5180 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5181 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5182 __func__,
5183 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5184 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5185 args->bc_attrs.max_reqs);
5186}
5187
43c2e885 5188static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5189{
43c2e885
BF		 5190 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5191 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5192
43c2e885
BF		 5193 if (rcvd->max_resp_sz > sent->max_resp_sz)
5194 return -EINVAL;
5195 /*
5196 * Our requested max_ops is the minimum we need; we're not
5197 * prepared to break up compounds into smaller pieces than that.
5198 * So, no point even trying to continue if the server won't
5199 * cooperate:
5200 */
5201 if (rcvd->max_ops < sent->max_ops)
5202 return -EINVAL;
5203 if (rcvd->max_reqs == 0)
5204 return -EINVAL;
5205 return 0;
8d35301d
AA		 5206}
5207
43c2e885
BF		 5208static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5209{
5210 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5211 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5212
43c2e885
BF		 5213 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5214 return -EINVAL;
5215 if (rcvd->max_resp_sz < sent->max_resp_sz)
5216 return -EINVAL;
5217 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5218 return -EINVAL;
5219 /* These would render the backchannel useless: */
5220 if (rcvd->max_ops == 0)
5221 return -EINVAL;
5222 if (rcvd->max_reqs == 0)
5223 return -EINVAL;
5224 return 0;
5225}
8d35301d 5226
8d35301d
AA		 5227static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5228 struct nfs4_session *session)
5229{
43c2e885 5230 int ret;
8d35301d 5231
43c2e885
BF		 5232 ret = nfs4_verify_fore_channel_attrs(args, session);
5233 if (ret)
5234 return ret;
5235 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5236}
5237
fc931582
AA		 5238static int _nfs4_proc_create_session(struct nfs_client *clp)
5239{
5240 struct nfs4_session *session = clp->cl_session;
5241 struct nfs41_create_session_args args = {
5242 .client = clp,
5243 .cb_program = NFS4_CALLBACK,
5244 };
5245 struct nfs41_create_session_res res = {
5246 .client = clp,
5247 };
5248 struct rpc_message msg = {
5249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5250 .rpc_argp = &args,
5251 .rpc_resp = &res,
5252 };
5253 int status;
5254
5255 nfs4_init_channel_attrs(&args);
0f91421e 5256 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5257
1bd714f2 5258 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5259
8d35301d
AA		 5260 if (!status)
5261 /* Verify the session's negotiated channel_attrs values */
5262 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5263 if (!status) {
5264 /* Increment the clientid slot sequence id */
5265 clp->cl_seqid++;
5266 }
5267
5268 return status;
5269}
5270
5271/*
5272 * Issues a CREATE_SESSION operation to the server.
5273 * It is the responsibility of the caller to verify the session is
5274 * expired before calling this routine.
5275 */
f26468fb 5276int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5277{
5278 int status;
5279 unsigned *ptr;
fc931582
AA		 5280 struct nfs4_session *session = clp->cl_session;
5281
5282 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5283
fd954ae1 5284 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5285 if (status)
5286 goto out;
5287
f26468fb
TM		 5288 /* Init and reset the fore channel */
5289 status = nfs4_init_slot_tables(session);
5290 dprintk("slot table initialization returned %d\n", status);
5291 if (status)
5292 goto out;
5293 status = nfs4_reset_slot_tables(session);
5294 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5295 if (status)
5296 goto out;
5297
5298 ptr = (unsigned *)&session->sess_id.data[0];
5299 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5300 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5301out:
5302 dprintk("<-- %s\n", __func__);
5303 return status;
5304}
5305
0f3e66c6
AA		 5306/*
5307 * Issue the over-the-wire RPC DESTROY_SESSION.
5308 * The caller must serialize access to this routine.
5309 */
5310int nfs4_proc_destroy_session(struct nfs4_session *session)
5311{
5312 int status = 0;
5313 struct rpc_message msg;
5314
5315 dprintk("--> nfs4_proc_destroy_session\n");
5316
5317 /* session is still being setup */
5318 if (session->clp->cl_cons_state != NFS_CS_READY)
5319 return status;
5320
5321 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5322 msg.rpc_argp = session;
5323 msg.rpc_resp = NULL;
5324 msg.rpc_cred = NULL;
1bd714f2 5325 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5326
5327 if (status)
5328 printk(KERN_WARNING
5329 "Got error %d from the server on DESTROY_SESSION. "
5330 "Session has been destroyed regardless...\n", status);
5331
5332 dprintk("<-- nfs4_proc_destroy_session\n");
5333 return status;
5334}
5335
fccba804
TM		 5336int nfs4_init_session(struct nfs_server *server)
5337{
5338 struct nfs_client *clp = server->nfs_client;
2449ea2e 5339 struct nfs4_session *session;
68bf05ef 5340 unsigned int rsize, wsize;
fccba804
TM		 5341 int ret;
5342
5343 if (!nfs4_has_session(clp))
5344 return 0;
5345
1055d76d
TM		 5346 session = clp->cl_session;
5347 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5348 return 0;
5349
68bf05ef
AA		 5350 rsize = server->rsize;
5351 if (rsize == 0)
5352 rsize = NFS_MAX_FILE_IO_SIZE;
5353 wsize = server->wsize;
5354 if (wsize == 0)
5355 wsize = NFS_MAX_FILE_IO_SIZE;
5356
68bf05ef
AA		 5357 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5358 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5359
fccba804
TM		 5360 ret = nfs4_recover_expired_lease(server);
5361 if (!ret)
5362 ret = nfs4_check_client_ready(clp);
5363 return ret;
5364}
5365
d83217c1
AA		 5366int nfs4_init_ds_session(struct nfs_client *clp)
5367{
5368 struct nfs4_session *session = clp->cl_session;
5369 int ret;
5370
5371 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5372 return 0;
5373
5374 ret = nfs4_client_recover_expired_lease(clp);
5375 if (!ret)
5376 /* Test for the DS role */
5377 if (!is_ds_client(clp))
5378 ret = -ENODEV;
5379 if (!ret)
5380 ret = nfs4_check_client_ready(clp);
5381 return ret;
5382
5383}
5384EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5385
5386
fc01cea9
AA		 5387/*
5388 * Renew the cl_session lease.
5389 */
d5f8d3fe
TM		 5390struct nfs4_sequence_data {
5391 struct nfs_client *clp;
5392 struct nfs4_sequence_args args;
5393 struct nfs4_sequence_res res;
5394};
5395
dc96aef9
AB		 5396static void nfs41_sequence_release(void *data)
5397{
d5f8d3fe
TM		 5398 struct nfs4_sequence_data *calldata = data;
5399 struct nfs_client *clp = calldata->clp;
dc96aef9 5400
7135840f
AB		 5401 if (atomic_read(&clp->cl_count) > 1)
5402 nfs4_schedule_state_renewal(clp);
5403 nfs_put_client(clp);
d5f8d3fe 5404 kfree(calldata);
dc96aef9
AB		 5405}
5406
aa5190d0
TM		 5407static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5408{
5409 switch(task->tk_status) {
5410 case -NFS4ERR_DELAY:
aa5190d0
TM		 5411 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5412 return -EAGAIN;
5413 default:
0400a6b0 5414 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5415 }
5416 return 0;
5417}
5418
dc96aef9 5419static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5420{
d5f8d3fe
TM		 5421 struct nfs4_sequence_data *calldata = data;
5422 struct nfs_client *clp = calldata->clp;
fc01cea9 5423
14516c3a
TM		 5424 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5425 return;
fc01cea9
AA		 5426
5427 if (task->tk_status < 0) {
5428 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5429 if (atomic_read(&clp->cl_count) == 1)
5430 goto out;
fc01cea9 5431
aa5190d0
TM		 5432 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5433 rpc_restart_call_prepare(task);
fc01cea9
AA		 5434 return;
5435 }
5436 }
fc01cea9 5437 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5438out:
fc01cea9
AA		 5439 dprintk("<-- %s\n", __func__);
5440}
5441
5442static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5443{
d5f8d3fe
TM		 5444 struct nfs4_sequence_data *calldata = data;
5445 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5446 struct nfs4_sequence_args *args;
5447 struct nfs4_sequence_res *res;
5448
fc01cea9
AA		 5449 args = task->tk_msg.rpc_argp;
5450 res = task->tk_msg.rpc_resp;
5451
035168ab 5452 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5453 return;
5454 rpc_call_start(task);
5455}
5456
5457static const struct rpc_call_ops nfs41_sequence_ops = {
5458 .rpc_call_done = nfs41_sequence_call_done,
5459 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5460 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5461};
5462
71ac6da9 5463static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5464{
d5f8d3fe 5465 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5466 struct rpc_message msg = {
5467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5468 .rpc_cred = cred,
5469 };
71ac6da9
TM		 5470 struct rpc_task_setup task_setup_data = {
5471 .rpc_client = clp->cl_rpcclient,
5472 .rpc_message = &msg,
5473 .callback_ops = &nfs41_sequence_ops,
5474 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5475 };
fc01cea9 5476
7135840f 5477 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5478 return ERR_PTR(-EIO);
dfb4f309 5479 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5480 if (calldata == NULL) {
7135840f 5481 nfs_put_client(clp);
71ac6da9 5482 return ERR_PTR(-ENOMEM);
fc01cea9 5483 }
d5f8d3fe
TM		 5484 msg.rpc_argp = &calldata->args;
5485 msg.rpc_resp = &calldata->res;
5486 calldata->clp = clp;
71ac6da9 5487 task_setup_data.callback_data = calldata;
fc01cea9 5488
71ac6da9
TM		 5489 return rpc_run_task(&task_setup_data);
5490}
5491
2f60ea6b 5492static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5493{
5494 struct rpc_task *task;
5495 int ret = 0;
5496
2f60ea6b
TM		 5497 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5498 return 0;
71ac6da9
TM		 5499 task = _nfs41_proc_sequence(clp, cred);
5500 if (IS_ERR(task))
5501 ret = PTR_ERR(task);
5502 else
bf294b41 5503 rpc_put_task_async(task);
71ac6da9
TM		 5504 dprintk("<-- %s status=%d\n", __func__, ret);
5505 return ret;
5506}
5507
5508static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5509{
5510 struct rpc_task *task;
5511 int ret;
5512
5513 task = _nfs41_proc_sequence(clp, cred);
5514 if (IS_ERR(task)) {
5515 ret = PTR_ERR(task);
5516 goto out;
5517 }
5518 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5519 if (!ret) {
5520 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5521
5522 if (task->tk_status == 0)
5523 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5524 ret = task->tk_status;
b4410c2f 5525 }
71ac6da9
TM		 5526 rpc_put_task(task);
5527out:
5528 dprintk("<-- %s status=%d\n", __func__, ret);
5529 return ret;
fc01cea9
AA		 5530}
5531
fce5c838
RL		 5532struct nfs4_reclaim_complete_data {
5533 struct nfs_client *clp;
5534 struct nfs41_reclaim_complete_args arg;
5535 struct nfs41_reclaim_complete_res res;
5536};
5537
5538static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5539{
5540 struct nfs4_reclaim_complete_data *calldata = data;
5541
b257957e 5542 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5543 if (nfs41_setup_sequence(calldata->clp->cl_session,
5544 &calldata->arg.seq_args,
fce5c838
RL		 5545 &calldata->res.seq_res, 0, task))
5546 return;
5547
5548 rpc_call_start(task);
5549}
5550
aa5190d0
TM		 5551static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5552{
5553 switch(task->tk_status) {
5554 case 0:
5555 case -NFS4ERR_COMPLETE_ALREADY:
5556 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5557 break;
5558 case -NFS4ERR_DELAY:
aa5190d0 5559 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5560 /* fall through */
5561 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5562 return -EAGAIN;
5563 default:
0400a6b0 5564 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5565 }
5566 return 0;
5567}
5568
fce5c838
RL		 5569static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5570{
5571 struct nfs4_reclaim_complete_data *calldata = data;
5572 struct nfs_client *clp = calldata->clp;
5573 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5574
5575 dprintk("--> %s\n", __func__);
14516c3a
TM		 5576 if (!nfs41_sequence_done(task, res))
5577 return;
fce5c838 5578
aa5190d0
TM		 5579 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5580 rpc_restart_call_prepare(task);
5581 return;
5582 }
fce5c838
RL		 5583 dprintk("<-- %s\n", __func__);
5584}
5585
5586static void nfs4_free_reclaim_complete_data(void *data)
5587{
5588 struct nfs4_reclaim_complete_data *calldata = data;
5589
5590 kfree(calldata);
5591}
5592
5593static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5594 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5595 .rpc_call_done = nfs4_reclaim_complete_done,
5596 .rpc_release = nfs4_free_reclaim_complete_data,
5597};
5598
5599/*
5600 * Issue a global reclaim complete.
5601 */
5602static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5603{
5604 struct nfs4_reclaim_complete_data *calldata;
5605 struct rpc_task *task;
5606 struct rpc_message msg = {
5607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5608 };
5609 struct rpc_task_setup task_setup_data = {
5610 .rpc_client = clp->cl_rpcclient,
5611 .rpc_message = &msg,
5612 .callback_ops = &nfs4_reclaim_complete_call_ops,
5613 .flags = RPC_TASK_ASYNC,
5614 };
5615 int status = -ENOMEM;
5616
5617 dprintk("--> %s\n", __func__);
8535b2be 5618 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5619 if (calldata == NULL)
5620 goto out;
5621 calldata->clp = clp;
5622 calldata->arg.one_fs = 0;
fce5c838
RL		 5623
5624 msg.rpc_argp = &calldata->arg;
5625 msg.rpc_resp = &calldata->res;
5626 task_setup_data.callback_data = calldata;
5627 task = rpc_run_task(&task_setup_data);
acf82b85 5628 if (IS_ERR(task)) {
fce5c838 5629 status = PTR_ERR(task);
acf82b85
DC		 5630 goto out;
5631 }
c34c32ea
AA		 5632 status = nfs4_wait_for_completion_rpc_task(task);
5633 if (status == 0)
5634 status = task->tk_status;
fce5c838 5635 rpc_put_task(task);
acf82b85 5636 return 0;
fce5c838
RL		 5637out:
5638 dprintk("<-- %s status=%d\n", __func__, status);
5639 return status;
5640}
b1f69b75
AA		 5641
5642static void
5643nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5644{
5645 struct nfs4_layoutget *lgp = calldata;
c31663d4 5646 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5647
5648 dprintk("--> %s\n", __func__);
c31663d4
FI		 5649 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5650 * right now covering the LAYOUTGET we are about to send.
5651 * However, that is not so catastrophic, and there seems
5652 * to be no way to prevent it completely.
5653 */
b1f69b75
AA		 5654 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5655 &lgp->res.seq_res, 0, task))
5656 return;
cf7d63f1
FI		 5657 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5658 NFS_I(lgp->args.inode)->layout,
5659 lgp->args.ctx->state)) {
5660 rpc_exit(task, NFS4_OK);
5661 return;
5662 }
b1f69b75
AA		 5663 rpc_call_start(task);
5664}
5665
5666static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5667{
5668 struct nfs4_layoutget *lgp = calldata;
5669 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5670
5671 dprintk("--> %s\n", __func__);
5672
5673 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5674 return;
5675
5676 switch (task->tk_status) {
5677 case 0:
5678 break;
5679 case -NFS4ERR_LAYOUTTRYLATER:
5680 case -NFS4ERR_RECALLCONFLICT:
5681 task->tk_status = -NFS4ERR_DELAY;
5682 /* Fall through */
5683 default:
5684 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5685 rpc_restart_call_prepare(task);
5686 return;
5687 }
5688 }
b1f69b75
AA		 5689 dprintk("<-- %s\n", __func__);
5690}
5691
5692static void nfs4_layoutget_release(void *calldata)
5693{
5694 struct nfs4_layoutget *lgp = calldata;
5695
5696 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5697 put_nfs_open_context(lgp->args.ctx);
5698 kfree(calldata);
5699 dprintk("<-- %s\n", __func__);
5700}
5701
5702static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5703 .rpc_call_prepare = nfs4_layoutget_prepare,
5704 .rpc_call_done = nfs4_layoutget_done,
5705 .rpc_release = nfs4_layoutget_release,
5706};
5707
5708int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5709{
5710 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5711 struct rpc_task *task;
5712 struct rpc_message msg = {
5713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5714 .rpc_argp = &lgp->args,
5715 .rpc_resp = &lgp->res,
5716 };
5717 struct rpc_task_setup task_setup_data = {
5718 .rpc_client = server->client,
5719 .rpc_message = &msg,
5720 .callback_ops = &nfs4_layoutget_call_ops,
5721 .callback_data = lgp,
5722 .flags = RPC_TASK_ASYNC,
5723 };
5724 int status = 0;
5725
5726 dprintk("--> %s\n", __func__);
5727
35124a09 5728 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5729 lgp->res.seq_res.sr_slot = NULL;
5730 task = rpc_run_task(&task_setup_data);
5731 if (IS_ERR(task))
5732 return PTR_ERR(task);
5733 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5734 if (status == 0)
5735 status = task->tk_status;
5736 if (status == 0)
5737 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5738 rpc_put_task(task);
5739 dprintk("<-- %s status=%d\n", __func__, status);
5740 return status;
5741}
5742
cbe82603
BH		 5743static void
5744nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5745{
5746 struct nfs4_layoutreturn *lrp = calldata;
5747
5748 dprintk("--> %s\n", __func__);
5749 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5750 &lrp->res.seq_res, 0, task))
5751 return;
5752 rpc_call_start(task);
5753}
5754
5755static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5756{
5757 struct nfs4_layoutreturn *lrp = calldata;
5758 struct nfs_server *server;
a56aaa02 5759 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5760
5761 dprintk("--> %s\n", __func__);
5762
5763 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5764 return;
5765
5766 server = NFS_SERVER(lrp->args.inode);
5767 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5768 rpc_restart_call_prepare(task);
cbe82603
BH		 5769 return;
5770 }
a2e1d4f2 5771 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5772 if (task->tk_status == 0) {
cbe82603 5773 if (lrp->res.lrs_present) {
cbe82603 5774 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5775 } else
5776 BUG_ON(!list_empty(&lo->plh_segs));
5777 }
a2e1d4f2
FI		 5778 lo->plh_block_lgets--;
5779 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5780 dprintk("<-- %s\n", __func__);
5781}
5782
5783static void nfs4_layoutreturn_release(void *calldata)
5784{
5785 struct nfs4_layoutreturn *lrp = calldata;
5786
5787 dprintk("--> %s\n", __func__);
a56aaa02 5788 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5789 kfree(calldata);
5790 dprintk("<-- %s\n", __func__);
5791}
5792
5793static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5794 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5795 .rpc_call_done = nfs4_layoutreturn_done,
5796 .rpc_release = nfs4_layoutreturn_release,
5797};
5798
5799int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5800{
5801 struct rpc_task *task;
5802 struct rpc_message msg = {
5803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5804 .rpc_argp = &lrp->args,
5805 .rpc_resp = &lrp->res,
5806 };
5807 struct rpc_task_setup task_setup_data = {
5808 .rpc_client = lrp->clp->cl_rpcclient,
5809 .rpc_message = &msg,
5810 .callback_ops = &nfs4_layoutreturn_call_ops,
5811 .callback_data = lrp,
5812 };
5813 int status;
5814
5815 dprintk("--> %s\n", __func__);
5816 task = rpc_run_task(&task_setup_data);
5817 if (IS_ERR(task))
5818 return PTR_ERR(task);
5819 status = task->tk_status;
5820 dprintk("<-- %s status=%d\n", __func__, status);
5821 rpc_put_task(task);
5822 return status;
5823}
5824
7f11d8d3
AA		 5825/*
5826 * Retrieve the list of Data Server devices from the MDS.
5827 */
5828static int _nfs4_getdevicelist(struct nfs_server *server,
5829 const struct nfs_fh *fh,
5830 struct pnfs_devicelist *devlist)
5831{
5832 struct nfs4_getdevicelist_args args = {
5833 .fh = fh,
5834 .layoutclass = server->pnfs_curr_ld->id,
5835 };
5836 struct nfs4_getdevicelist_res res = {
5837 .devlist = devlist,
5838 };
5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5841 .rpc_argp = &args,
5842 .rpc_resp = &res,
5843 };
5844 int status;
5845
5846 dprintk("--> %s\n", __func__);
5847 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5848 &res.seq_res, 0);
5849 dprintk("<-- %s status=%d\n", __func__, status);
5850 return status;
5851}
5852
5853int nfs4_proc_getdevicelist(struct nfs_server *server,
5854 const struct nfs_fh *fh,
5855 struct pnfs_devicelist *devlist)
5856{
5857 struct nfs4_exception exception = { };
5858 int err;
5859
5860 do {
5861 err = nfs4_handle_exception(server,
5862 _nfs4_getdevicelist(server, fh, devlist),
5863 &exception);
5864 } while (exception.retry);
5865
5866 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5867 err, devlist->num_devs);
5868
5869 return err;
5870}
5871EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5872
b1f69b75
AA		 5873static int
5874_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5875{
5876 struct nfs4_getdeviceinfo_args args = {
5877 .pdev = pdev,
5878 };
5879 struct nfs4_getdeviceinfo_res res = {
5880 .pdev = pdev,
5881 };
5882 struct rpc_message msg = {
5883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5884 .rpc_argp = &args,
5885 .rpc_resp = &res,
5886 };
5887 int status;
5888
5889 dprintk("--> %s\n", __func__);
7c513058 5890 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5891 dprintk("<-- %s status=%d\n", __func__, status);
5892
5893 return status;
5894}
5895
5896int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5897{
5898 struct nfs4_exception exception = { };
5899 int err;
5900
5901 do {
5902 err = nfs4_handle_exception(server,
5903 _nfs4_proc_getdeviceinfo(server, pdev),
5904 &exception);
5905 } while (exception.retry);
5906 return err;
5907}
5908EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5909
863a3c6c
AA		 5910static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5911{
5912 struct nfs4_layoutcommit_data *data = calldata;
5913 struct nfs_server *server = NFS_SERVER(data->args.inode);
5914
5915 if (nfs4_setup_sequence(server, &data->args.seq_args,
5916 &data->res.seq_res, 1, task))
5917 return;
5918 rpc_call_start(task);
5919}
5920
5921static void
5922nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5923{
5924 struct nfs4_layoutcommit_data *data = calldata;
5925 struct nfs_server *server = NFS_SERVER(data->args.inode);
5926
5927 if (!nfs4_sequence_done(task, &data->res.seq_res))
5928 return;
5929
5930 switch (task->tk_status) { /* Just ignore these failures */
5931 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5932 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5933 case NFS4ERR_BADLAYOUT: /* no layout */
5934 case NFS4ERR_GRACE: /* loca_recalim always false */
5935 task->tk_status = 0;
5936 }
5937
5938 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5939 rpc_restart_call_prepare(task);
863a3c6c
AA		 5940 return;
5941 }
5942
5943 if (task->tk_status == 0)
5944 nfs_post_op_update_inode_force_wcc(data->args.inode,
5945 data->res.fattr);
5946}
5947
5948static void nfs4_layoutcommit_release(void *calldata)
5949{
5950 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 5951 struct pnfs_layout_segment *lseg, *tmp;
92407e75 5952 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 5953
db29c089 5954 pnfs_cleanup_layoutcommit(data);
863a3c6c 5955 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 5956 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5957 list_del_init(&lseg->pls_lc_list);
5958 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5959 &lseg->pls_flags))
5960 put_lseg(lseg);
5961 }
92407e75
PT		 5962
5963 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
5964 smp_mb__after_clear_bit();
5965 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
5966
863a3c6c
AA		 5967 put_rpccred(data->cred);
5968 kfree(data);
5969}
5970
5971static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5972 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5973 .rpc_call_done = nfs4_layoutcommit_done,
5974 .rpc_release = nfs4_layoutcommit_release,
5975};
5976
5977int
ef311537 5978nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5979{
5980 struct rpc_message msg = {
5981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5982 .rpc_argp = &data->args,
5983 .rpc_resp = &data->res,
5984 .rpc_cred = data->cred,
5985 };
5986 struct rpc_task_setup task_setup_data = {
5987 .task = &data->task,
5988 .rpc_client = NFS_CLIENT(data->args.inode),
5989 .rpc_message = &msg,
5990 .callback_ops = &nfs4_layoutcommit_ops,
5991 .callback_data = data,
5992 .flags = RPC_TASK_ASYNC,
5993 };
5994 struct rpc_task *task;
5995 int status = 0;
5996
5997 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5998 "lbw: %llu inode %lu\n",
5999 data->task.tk_pid, sync,
6000 data->args.lastbytewritten,
6001 data->args.inode->i_ino);
6002
6003 task = rpc_run_task(&task_setup_data);
6004 if (IS_ERR(task))
6005 return PTR_ERR(task);
ef311537 6006 if (sync == false)
863a3c6c
AA		 6007 goto out;
6008 status = nfs4_wait_for_completion_rpc_task(task);
6009 if (status != 0)
6010 goto out;
6011 status = task->tk_status;
6012out:
6013 dprintk("%s: status %d\n", __func__, status);
6014 rpc_put_task(task);
6015 return status;
6016}
fca78d6d
BS		 6017
6018static int
6019_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6020 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6021{
6022 struct nfs41_secinfo_no_name_args args = {
6023 .style = SECINFO_STYLE_CURRENT_FH,
6024 };
6025 struct nfs4_secinfo_res res = {
6026 .flavors = flavors,
6027 };
6028 struct rpc_message msg = {
6029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6030 .rpc_argp = &args,
6031 .rpc_resp = &res,
6032 };
6033 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6034}
6035
6036static int
6037nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6038 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6039{
6040 struct nfs4_exception exception = { };
6041 int err;
6042 do {
6043 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6044 switch (err) {
6045 case 0:
6046 case -NFS4ERR_WRONGSEC:
6047 case -NFS4ERR_NOTSUPP:
6048 break;
6049 default:
6050 err = nfs4_handle_exception(server, err, &exception);
6051 }
6052 } while (exception.retry);
6053 return err;
6054}
6055
6056static int
6057nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6058 struct nfs_fsinfo *info)
6059{
6060 int err;
6061 struct page *page;
6062 rpc_authflavor_t flavor;
6063 struct nfs4_secinfo_flavors *flavors;
6064
6065 page = alloc_page(GFP_KERNEL);
6066 if (!page) {
6067 err = -ENOMEM;
6068 goto out;
6069 }
6070
6071 flavors = page_address(page);
6072 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6073
6074 /*
6075 * Fall back on "guess and check" method if
6076 * the server doesn't support SECINFO_NO_NAME
6077 */
6078 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6079 err = nfs4_find_root_sec(server, fhandle, info);
6080 goto out_freepage;
6081 }
6082 if (err)
6083 goto out_freepage;
6084
6085 flavor = nfs_find_best_sec(flavors);
6086 if (err == 0)
6087 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6088
6089out_freepage:
6090 put_page(page);
6091 if (err == -EACCES)
6092 return -EPERM;
6093out:
6094 return err;
6095}
7d974794
BS		 6096static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6097{
6098 int status;
6099 struct nfs41_test_stateid_args args = {
6100 .stateid = &state->stateid,
6101 };
6102 struct nfs41_test_stateid_res res;
6103 struct rpc_message msg = {
6104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6105 .rpc_argp = &args,
6106 .rpc_resp = &res,
6107 };
6108 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6109 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6110 return status;
6111}
6112
6113static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6114{
6115 struct nfs4_exception exception = { };
6116 int err;
6117 do {
6118 err = nfs4_handle_exception(server,
6119 _nfs41_test_stateid(server, state),
6120 &exception);
6121 } while (exception.retry);
6122 return err;
6123}
9aeda35f
BS		 6124
6125static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6126{
6127 int status;
6128 struct nfs41_free_stateid_args args = {
6129 .stateid = &state->stateid,
6130 };
6131 struct nfs41_free_stateid_res res;
6132 struct rpc_message msg = {
6133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6134 .rpc_argp = &args,
6135 .rpc_resp = &res,
6136 };
6137
6138 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6139 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6140 return status;
6141}
6142
6143static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6144{
6145 struct nfs4_exception exception = { };
6146 int err;
6147 do {
6148 err = nfs4_handle_exception(server,
6149 _nfs4_free_stateid(server, state),
6150 &exception);
6151 } while (exception.retry);
6152 return err;
6153}
557134a3
AA		 6154#endif /* CONFIG_NFS_V4_1 */
6155
591d71cb 6156struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6157 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6158 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6159 .recover_open = nfs4_open_reclaim,
6160 .recover_lock = nfs4_lock_reclaim,
591d71cb 6161 .establish_clid = nfs4_init_clientid,
90a16617 6162 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6163};
6164
591d71cb
AA		 6165#if defined(CONFIG_NFS_V4_1)
6166struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6167 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6168 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6169 .recover_open = nfs4_open_reclaim,
6170 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6171 .establish_clid = nfs41_init_clientid,
b4b82607 6172 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6173 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6174};
6175#endif /* CONFIG_NFS_V4_1 */
6176
6177struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6178 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6179 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6180 .recover_open = nfs4_open_expired,
6181 .recover_lock = nfs4_lock_expired,
6182 .establish_clid = nfs4_init_clientid,
90a16617 6183 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6184};
6185
6186#if defined(CONFIG_NFS_V4_1)
6187struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6188 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6189 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6190 .recover_open = nfs41_open_expired,
6191 .recover_lock = nfs41_lock_expired,
4d643d1d 6192 .establish_clid = nfs41_init_clientid,
b4b82607 6193 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6194};
591d71cb 6195#endif /* CONFIG_NFS_V4_1 */
1da177e4 6196
29fba38b
BH		 6197struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6198 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6199 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6200 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6201};
6202
6203#if defined(CONFIG_NFS_V4_1)
6204struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6205 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6206 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6207 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6208};
6209#endif
6210
97dc1359
TM		 6211static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6212 .minor_version = 0,
6213 .call_sync = _nfs4_call_sync,
e047a10c 6214 .validate_stateid = nfs4_validate_delegation_stateid,
fca78d6d 6215 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6216 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6217 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6218 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6219};
6220
6221#if defined(CONFIG_NFS_V4_1)
6222static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6223 .minor_version = 1,
6224 .call_sync = _nfs4_call_sync_session,
e047a10c 6225 .validate_stateid = nfs41_validate_delegation_stateid,
fca78d6d 6226 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6227 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6228 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6229 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6230};
6231#endif
6232
97dc1359
TM		 6233const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6234 [0] = &nfs_v4_0_minor_ops,
6235#if defined(CONFIG_NFS_V4_1)
6236 [1] = &nfs_v4_1_minor_ops,
6237#endif
6238};
6239
92e1d5be 6240static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6241 .permission = nfs_permission,
6242 .getattr = nfs_getattr,
6243 .setattr = nfs_setattr,
64c2ce8b
AK		 6244 .getxattr = generic_getxattr,
6245 .setxattr = generic_setxattr,
6246 .listxattr = generic_listxattr,
6247 .removexattr = generic_removexattr,
6b3b5496
BF		 6248};
6249
509de811 6250const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6251 .version = 4, /* protocol version */
6252 .dentry_ops = &nfs4_dentry_operations,
6253 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6254 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6255 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6256 .getroot = nfs4_proc_get_root,
6257 .getattr = nfs4_proc_getattr,
6258 .setattr = nfs4_proc_setattr,
6259 .lookup = nfs4_proc_lookup,
6260 .access = nfs4_proc_access,
6261 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6262 .create = nfs4_proc_create,
6263 .remove = nfs4_proc_remove,
6264 .unlink_setup = nfs4_proc_unlink_setup,
6265 .unlink_done = nfs4_proc_unlink_done,
6266 .rename = nfs4_proc_rename,
d3d4152a
JL		 6267 .rename_setup = nfs4_proc_rename_setup,
6268 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6269 .link = nfs4_proc_link,
6270 .symlink = nfs4_proc_symlink,
6271 .mkdir = nfs4_proc_mkdir,
6272 .rmdir = nfs4_proc_remove,
6273 .readdir = nfs4_proc_readdir,
6274 .mknod = nfs4_proc_mknod,
6275 .statfs = nfs4_proc_statfs,
6276 .fsinfo = nfs4_proc_fsinfo,
6277 .pathconf = nfs4_proc_pathconf,
e9326dca 6278 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6279 .decode_dirent = nfs4_decode_dirent,
6280 .read_setup = nfs4_proc_read_setup,
ec06c096 6281 .read_done = nfs4_read_done,
1da177e4 6282 .write_setup = nfs4_proc_write_setup,
788e7a89 6283 .write_done = nfs4_write_done,
1da177e4 6284 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6285 .commit_done = nfs4_commit_done,
1da177e4 6286 .lock = nfs4_proc_lock,
e50a1c2e 6287 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6288 .close_context = nfs4_close_context,
2b484297 6289 .open_context = nfs4_atomic_open,
45a52a02 6290 .init_client = nfs4_init_client,
5a5ea0d4 6291 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6292};
6293
64c2ce8b
AK		 6294static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6295 .prefix = XATTR_NAME_NFSV4_ACL,
6296 .list = nfs4_xattr_list_nfs4_acl,
6297 .get = nfs4_xattr_get_nfs4_acl,
6298 .set = nfs4_xattr_set_nfs4_acl,
6299};
6300
6301const struct xattr_handler *nfs4_xattr_handlers[] = {
6302 &nfs4_xattr_nfs4_acl_handler,
6303 NULL
6304};
6305
1da177e4
LT		 6306/*
6307 * Local variables:
6308 * c-basic-offset: 8
6309 * End:
6310 */
kernel source for telekom puls (alcatel/mediatek)