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NFS: Don't free a state ID the server does not recognize
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
f092075d 67#include "netns.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
a78cb57a
TM		 74#define NFS4_MAX_LOOP_ON_RECOVER (10)
75
ef159e91
TM		 76static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
77
cdd4e68b 78struct nfs4_opendata;
864472e9 79static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 80static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 81static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 82static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 83static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 84static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 85static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 86static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
87 struct nfs_fattr *fattr, struct iattr *sattr,
88 struct nfs4_state *state);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 92#endif
1da177e4 93/* Prevent leaks of NFSv4 errors into userland */
46f72f57 94static int nfs4_map_errors(int err)
1da177e4 95{
52567b03
TM		 96 if (err >= -1000)
97 return err;
98 switch (err) {
99 case -NFS4ERR_RESOURCE:
100 return -EREMOTEIO;
7ebb9315
BS		 101 case -NFS4ERR_WRONGSEC:
102 return -EPERM;
3ddeb7c5
TM		 103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
105 return -EINVAL;
fb13bfa7
TM		 106 case -NFS4ERR_SHARE_DENIED:
107 return -EACCES;
f25efd85
SD		 108 case -NFS4ERR_MINOR_VERS_MISMATCH:
109 return -EPROTONOSUPPORT;
52567b03 110 default:
1da177e4 111 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 112 __func__, -err);
52567b03 113 break;
1da177e4 114 }
52567b03 115 return -EIO;
1da177e4
LT		 116}
117
118/*
119 * This is our standard bitmap for GETATTR requests.
120 */
1549210f 121const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 122 FATTR4_WORD0_TYPE
123 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_SIZE
125 | FATTR4_WORD0_FSID
126 | FATTR4_WORD0_FILEID,
127 FATTR4_WORD1_MODE
128 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
136};
137
1549210f
TM		 138static const u32 nfs4_pnfs_open_bitmap[3] = {
139 FATTR4_WORD0_TYPE
140 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_SIZE
142 | FATTR4_WORD0_FSID
143 | FATTR4_WORD0_FILEID,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
154};
155
1da177e4
LT		 156const u32 nfs4_statfs_bitmap[2] = {
157 FATTR4_WORD0_FILES_AVAIL
158 | FATTR4_WORD0_FILES_FREE
159 | FATTR4_WORD0_FILES_TOTAL,
160 FATTR4_WORD1_SPACE_AVAIL
161 | FATTR4_WORD1_SPACE_FREE
162 | FATTR4_WORD1_SPACE_TOTAL
163};
164
4ce79717 165const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 166 FATTR4_WORD0_MAXLINK
167 | FATTR4_WORD0_MAXNAME,
168 0
169};
170
dae100c2 171const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 172 | FATTR4_WORD0_MAXREAD
173 | FATTR4_WORD0_MAXWRITE
174 | FATTR4_WORD0_LEASE_TIME,
55b6e774 175 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 176 | FATTR4_WORD1_FS_LAYOUT_TYPES,
177 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 178};
179
830b8e33
MN		 180const u32 nfs4_fs_locations_bitmap[2] = {
181 FATTR4_WORD0_TYPE
182 | FATTR4_WORD0_CHANGE
183 | FATTR4_WORD0_SIZE
184 | FATTR4_WORD0_FSID
185 | FATTR4_WORD0_FILEID
186 | FATTR4_WORD0_FS_LOCATIONS,
187 FATTR4_WORD1_MODE
188 | FATTR4_WORD1_NUMLINKS
189 | FATTR4_WORD1_OWNER
190 | FATTR4_WORD1_OWNER_GROUP
191 | FATTR4_WORD1_RAWDEV
192 | FATTR4_WORD1_SPACE_USED
193 | FATTR4_WORD1_TIME_ACCESS
194 | FATTR4_WORD1_TIME_METADATA
195 | FATTR4_WORD1_TIME_MODIFY
196 | FATTR4_WORD1_MOUNTED_ON_FILEID
197};
198
bc4785cd 199static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 200 struct nfs4_readdir_arg *readdir)
201{
0dbb4c67 202 __be32 *start, *p;
1da177e4
LT		 203
204 BUG_ON(readdir->count < 80);
205 if (cookie > 2) {
b7ef1956 206 readdir->cookie = cookie;
1da177e4
LT		 207 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
208 return;
209 }
210
211 readdir->cookie = 0;
212 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
213 if (cookie == 2)
214 return;
215
216 /*
217 * NFSv4 servers do not return entries for '.' and '..'
218 * Therefore, we fake these entries here. We let '.'
219 * have cookie 0 and '..' have cookie 1. Note that
220 * when talking to the server, we always send cookie 0
221 * instead of 1 or 2.
222 */
2b86ce2d 223 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 224
225 if (cookie == 0) {
226 *p++ = xdr_one; /* next */
227 *p++ = xdr_zero; /* cookie, first word */
228 *p++ = xdr_one; /* cookie, second word */
229 *p++ = xdr_one; /* entry len */
230 memcpy(p, ".\0\0\0", 4); /* entry */
231 p++;
232 *p++ = xdr_one; /* bitmap length */
233 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
234 *p++ = htonl(8); /* attribute buffer length */
4e769b93 235 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 236 }
237
238 *p++ = xdr_one; /* next */
239 *p++ = xdr_zero; /* cookie, first word */
240 *p++ = xdr_two; /* cookie, second word */
241 *p++ = xdr_two; /* entry len */
242 memcpy(p, "..\0\0", 4); /* entry */
243 p++;
244 *p++ = xdr_one; /* bitmap length */
245 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
246 *p++ = htonl(8); /* attribute buffer length */
4e769b93 247 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 248
249 readdir->pgbase = (char *)p - (char *)start;
250 readdir->count -= readdir->pgbase;
2b86ce2d 251 kunmap_atomic(start);
1da177e4
LT		 252}
253
65de872e
TM		 254static int nfs4_wait_clnt_recover(struct nfs_client *clp)
255{
256 int res;
257
258 might_sleep();
259
e005e804 260 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 261 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 262 return res;
263}
264
265static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
266{
267 int res = 0;
268
269 might_sleep();
270
271 if (*timeout <= 0)
272 *timeout = NFS4_POLL_RETRY_MIN;
273 if (*timeout > NFS4_POLL_RETRY_MAX)
274 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 275 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 276 if (fatal_signal_pending(current))
277 res = -ERESTARTSYS;
278 *timeout <<= 1;
279 return res;
280}
281
282/* This is the error handling routine for processes that are allowed
283 * to sleep.
284 */
b064eca2 285static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 286{
287 struct nfs_client *clp = server->nfs_client;
9e33bed5 288 struct nfs4_state *state = exception->state;
3114ea7a 289 struct inode *inode = exception->inode;
65de872e
TM		 290 int ret = errorcode;
291
292 exception->retry = 0;
293 switch(errorcode) {
294 case 0:
295 return 0;
3114ea7a 296 case -NFS4ERR_OPENMODE:
011e2a7f 297 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 298 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 299 exception->retry = 1;
300 return 0;
301 }
302 if (state == NULL)
303 break;
304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
a1d0b5ee 306 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 307 case -NFS4ERR_ADMIN_REVOKED:
308 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 309 if (state == NULL)
310 break;
14977489 311 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 312 nfs4_schedule_stateid_recovery(server, state);
313 goto wait_on_recovery;
0ced63d1
TM		 314 case -NFS4ERR_EXPIRED:
315 if (state != NULL)
316 nfs4_schedule_stateid_recovery(server, state);
65de872e 317 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 318 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 319 nfs4_schedule_lease_recovery(clp);
320 goto wait_on_recovery;
03391693 321#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 322 case -NFS4ERR_BADSESSION:
323 case -NFS4ERR_BADSLOT:
324 case -NFS4ERR_BAD_HIGH_SLOT:
325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
326 case -NFS4ERR_DEADSESSION:
327 case -NFS4ERR_SEQ_FALSE_RETRY:
328 case -NFS4ERR_SEQ_MISORDERED:
329 dprintk("%s ERROR: %d Reset session\n", __func__,
330 errorcode);
9f594791 331 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 332 exception->retry = 1;
b9179237 333 break;
03391693 334#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 335 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
338 * fail
339 */
340 ret = -EBUSY;
341 break;
342 }
65de872e
TM		 343 case -NFS4ERR_GRACE:
344 case -NFS4ERR_DELAY:
2c643488 345 case -EKEYEXPIRED:
65de872e
TM		 346 ret = nfs4_delay(server->client, &exception->timeout);
347 if (ret != 0)
348 break;
a8a4ae3a 349 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 350 case -NFS4ERR_OLD_STATEID:
351 exception->retry = 1;
b064eca2
TM		 352 break;
353 case -NFS4ERR_BADOWNER:
354 /* The following works around a Linux server bug! */
355 case -NFS4ERR_BADNAME:
356 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
357 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
358 exception->retry = 1;
359 printk(KERN_WARNING "NFS: v4 server %s "
360 "does not accept raw "
361 "uid/gids. "
362 "Reenabling the idmapper.\n",
363 server->nfs_client->cl_hostname);
364 }
65de872e
TM		 365 }
366 /* We failed to handle the error */
367 return nfs4_map_errors(ret);
0400a6b0 368wait_on_recovery:
a2c0b9e2
TM		 369 ret = nfs4_wait_clnt_recover(clp);
370 if (ret == 0)
371 exception->retry = 1;
372 return ret;
65de872e
TM		 373}
374
375
452e9352 376static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 377{
1da177e4
LT		 378 spin_lock(&clp->cl_lock);
379 if (time_before(clp->cl_last_renewal,timestamp))
380 clp->cl_last_renewal = timestamp;
381 spin_unlock(&clp->cl_lock);
382}
383
452e9352
TM		 384static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
385{
386 do_renew_lease(server->nfs_client, timestamp);
387}
388
cccef3b9
AA		 389#if defined(CONFIG_NFS_V4_1)
390
e2c4ab3c
AA		 391/*
392 * nfs4_free_slot - free a slot and efficiently update slot table.
393 *
394 * freeing a slot is trivially done by clearing its respective bit
395 * in the bitmap.
396 * If the freed slotid equals highest_used_slotid we want to update it
397 * so that the server would be able to size down the slot table if needed,
398 * otherwise we know that the highest_used_slotid is still in use.
399 * When updating highest_used_slotid there may be "holes" in the bitmap
400 * so we need to scan down from highest_used_slotid to 0 looking for the now
401 * highest slotid in use.
45d43c29 402 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 403 *
404 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 405 */
406static void
45d43c29 407nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 408{
45d43c29 409 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 410 /* clear used bit in bitmap */
411 __clear_bit(slotid, tbl->used_slots);
412
413 /* update highest_used_slotid when it is freed */
414 if (slotid == tbl->highest_used_slotid) {
415 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 416 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 417 tbl->highest_used_slotid = slotid;
418 else
45d43c29 419 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 420 }
45d43c29
TM		 421 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
422 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 423}
424
961a828d
TM		 425bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
426{
427 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
428 return true;
e2c4ab3c
AA		 429}
430
3bfb0fc5 431/*
42acd021 432 * Signal state manager thread if session fore channel is drained
3bfb0fc5 433 */
42acd021 434static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 435{
a2118c33 436 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 437 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
438 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 439 return;
440 }
441
45d43c29 442 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 443 return;
444
42acd021
AA		 445 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
446 complete(&ses->fc_slot_table.complete);
447}
448
449/*
450 * Signal state manager thread if session back channel is drained
451 */
452void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
453{
454 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 455 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 456 return;
457 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
458 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 459}
460
d185a334 461static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 462{
463 struct nfs4_slot_table *tbl;
464
d185a334 465 tbl = &res->sr_session->fc_slot_table;
dfb4f309 466 if (!res->sr_slot) {
13615871
AA		 467 /* just wake up the next guy waiting since
468 * we may have not consumed a slot after all */
691daf3b 469 dprintk("%s: No slot\n", __func__);
35dc1d74 470 return;
13615871 471 }
ea028ac9 472
35dc1d74 473 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 474 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 475 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 476 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 477 res->sr_slot = NULL;
13615871
AA		 478}
479
14516c3a 480static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 481{
482 unsigned long timestamp;
14516c3a 483 struct nfs_client *clp;
b0df806c
AA		 484
485 /*
486 * sr_status remains 1 if an RPC level error occurred. The server
487 * may or may not have processed the sequence operation..
488 * Proceed as if the server received and processed the sequence
489 * operation.
490 */
491 if (res->sr_status == 1)
492 res->sr_status = NFS_OK;
493
468f8613
BS		 494 /* don't increment the sequence number if the task wasn't sent */
495 if (!RPC_WAS_SENT(task))
b0df806c
AA		 496 goto out;
497
691daf3b 498 /* Check the SEQUENCE operation status */
14516c3a
TM		 499 switch (res->sr_status) {
500 case 0:
b0df806c 501 /* Update the slot's sequence and clientid lease timer */
dfb4f309 502 ++res->sr_slot->seq_nr;
b0df806c 503 timestamp = res->sr_renewal_time;
14516c3a 504 clp = res->sr_session->clp;
452e9352 505 do_renew_lease(clp, timestamp);
0629e370 506 /* Check sequence flags */
b4410c2f
TM		 507 if (res->sr_status_flags != 0)
508 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 509 break;
510 case -NFS4ERR_DELAY:
511 /* The server detected a resend of the RPC call and
512 * returned NFS4ERR_DELAY as per Section 2.10.6.2
513 * of RFC5661.
514 */
12364a4f 515 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 516 __func__,
517 res->sr_slot - res->sr_session->fc_slot_table.slots,
518 res->sr_slot->seq_nr);
14516c3a
TM		 519 goto out_retry;
520 default:
521 /* Just update the slot sequence no. */
dfb4f309 522 ++res->sr_slot->seq_nr;
b0df806c
AA		 523 }
524out:
525 /* The session may be reset by one of the error handlers. */
526 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 527 nfs41_sequence_free_slot(res);
14516c3a
TM		 528 return 1;
529out_retry:
d05dd4e9 530 if (!rpc_restart_call(task))
14516c3a
TM		 531 goto out;
532 rpc_delay(task, NFS4_POLL_RETRY_MAX);
533 return 0;
b0df806c
AA		 534}
535
14516c3a
TM		 536static int nfs4_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
df896455 538{
14516c3a
TM		 539 if (res->sr_session == NULL)
540 return 1;
541 return nfs41_sequence_done(task, res);
df896455
TM		 542}
543
510b8175
BH		 544/*
545 * nfs4_find_slot - efficiently look for a free slot
546 *
547 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
548 * If found, we mark the slot as used, update the highest_used_slotid,
549 * and respectively set up the sequence operation args.
45d43c29 550 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 551 *
552 * Note: must be called with under the slot_tbl_lock.
510b8175 553 */
45d43c29 554static u32
40ead580 555nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 556{
45d43c29
TM		 557 u32 slotid;
558 u32 ret_id = NFS4_NO_SLOT;
510b8175 559
45d43c29 560 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 561 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
562 tbl->max_slots);
563 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
564 if (slotid >= tbl->max_slots)
565 goto out;
566 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 567 if (slotid > tbl->highest_used_slotid ||
568 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 569 tbl->highest_used_slotid = slotid;
570 ret_id = slotid;
571out:
572 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
573 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 574 return ret_id;
575}
576
9d12b216
TM		 577static void nfs41_init_sequence(struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res, int cache_reply)
579{
580 args->sa_session = NULL;
581 args->sa_cache_this = 0;
582 if (cache_reply)
583 args->sa_cache_this = 1;
584 res->sr_session = NULL;
585 res->sr_slot = NULL;
586}
587
dc70d7b3 588int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 589 struct nfs4_sequence_args *args,
590 struct nfs4_sequence_res *res,
ce5039c1
AA		 591 struct rpc_task *task)
592{
fbcd4abc
AA		 593 struct nfs4_slot *slot;
594 struct nfs4_slot_table *tbl;
45d43c29 595 u32 slotid;
fbcd4abc
AA		 596
597 dprintk("--> %s\n", __func__);
ce5039c1 598 /* slot already allocated? */
dfb4f309 599 if (res->sr_slot != NULL)
ce5039c1
AA		 600 return 0;
601
fbcd4abc
AA		 602 tbl = &session->fc_slot_table;
603
604 spin_lock(&tbl->slot_tbl_lock);
a2118c33 605 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 606 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 607 /* The state manager will wait until the slot table is empty */
05f0d236 608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 609 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 610 dprintk("%s session is draining\n", __func__);
05f0d236 611 return -EAGAIN;
b069d94a
AA		 612 }
613
689cf5c1
AB		 614 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
615 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
616 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
617 spin_unlock(&tbl->slot_tbl_lock);
618 dprintk("%s enforce FIFO order\n", __func__);
619 return -EAGAIN;
620 }
621
40ead580 622 slotid = nfs4_find_slot(tbl);
45d43c29 623 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 624 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
625 spin_unlock(&tbl->slot_tbl_lock);
626 dprintk("<-- %s: no free slots\n", __func__);
627 return -EAGAIN;
628 }
629 spin_unlock(&tbl->slot_tbl_lock);
630
689cf5c1 631 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 632 slot = tbl->slots + slotid;
99fe60d0 633 args->sa_session = session;
fbcd4abc 634 args->sa_slotid = slotid;
fbcd4abc
AA		 635
636 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
637
99fe60d0 638 res->sr_session = session;
dfb4f309 639 res->sr_slot = slot;
fbcd4abc 640 res->sr_renewal_time = jiffies;
2a6e26cd 641 res->sr_status_flags = 0;
fbcd4abc
AA		 642 /*
643 * sr_status is only set in decode_sequence, and so will remain
644 * set to 1 if an rpc level failure occurs.
645 */
646 res->sr_status = 1;
ce5039c1
AA		 647 return 0;
648}
dc70d7b3 649EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 650
035168ab 651int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 652 struct nfs4_sequence_args *args,
653 struct nfs4_sequence_res *res,
ce5039c1
AA		 654 struct rpc_task *task)
655{
035168ab 656 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 657 int ret = 0;
658
9d12b216 659 if (session == NULL)
035168ab 660 goto out;
035168ab 661
12364a4f 662 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 663 __func__, session->clp, session, res->sr_slot ?
664 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 665
9d12b216 666 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 667out:
668 dprintk("<-- %s status=%d\n", __func__, ret);
669 return ret;
670}
671
672struct nfs41_call_sync_data {
035168ab 673 const struct nfs_server *seq_server;
ce5039c1
AA		 674 struct nfs4_sequence_args *seq_args;
675 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 676};
677
678static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
679{
680 struct nfs41_call_sync_data *data = calldata;
681
035168ab
TM		 682 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
683
684 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 685 data->seq_res, task))
ce5039c1
AA		 686 return;
687 rpc_call_start(task);
688}
689
b257957e
AB		 690static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
691{
692 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
693 nfs41_call_sync_prepare(task, calldata);
694}
695
69ab40c4
AA		 696static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
697{
698 struct nfs41_call_sync_data *data = calldata;
699
14516c3a 700 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 701}
702
17280175 703static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 704 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 705 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 706};
707
17280175 708static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 709 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
710 .rpc_call_done = nfs41_call_sync_done,
711};
712
7c513058
BS		 713static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
714 struct nfs_server *server,
ce5039c1
AA		 715 struct rpc_message *msg,
716 struct nfs4_sequence_args *args,
717 struct nfs4_sequence_res *res,
b257957e 718 int privileged)
ce5039c1
AA		 719{
720 int ret;
721 struct rpc_task *task;
722 struct nfs41_call_sync_data data = {
035168ab 723 .seq_server = server,
ce5039c1
AA		 724 .seq_args = args,
725 .seq_res = res,
ce5039c1
AA		 726 };
727 struct rpc_task_setup task_setup = {
7c513058 728 .rpc_client = clnt,
ce5039c1
AA		 729 .rpc_message = msg,
730 .callback_ops = &nfs41_call_sync_ops,
731 .callback_data = &data
732 };
733
b257957e
AB		 734 if (privileged)
735 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 736 task = rpc_run_task(&task_setup);
737 if (IS_ERR(task))
738 ret = PTR_ERR(task);
739 else {
740 ret = task->tk_status;
741 rpc_put_task(task);
742 }
743 return ret;
744}
745
7c513058
BS		 746int _nfs4_call_sync_session(struct rpc_clnt *clnt,
747 struct nfs_server *server,
cccef3b9
AA		 748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
751 int cache_reply)
752{
9d12b216
TM		 753 nfs41_init_sequence(args, res, cache_reply);
754 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 755}
756
df896455 757#else
9d12b216
TM		 758static inline
759void nfs41_init_sequence(struct nfs4_sequence_args *args,
760 struct nfs4_sequence_res *res, int cache_reply)
761{
762}
763
14516c3a
TM		 764static int nfs4_sequence_done(struct rpc_task *task,
765 struct nfs4_sequence_res *res)
df896455 766{
14516c3a 767 return 1;
df896455 768}
cccef3b9
AA		 769#endif /* CONFIG_NFS_V4_1 */
770
7c513058
BS		 771int _nfs4_call_sync(struct rpc_clnt *clnt,
772 struct nfs_server *server,
cccef3b9
AA		 773 struct rpc_message *msg,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 int cache_reply)
777{
9d12b216 778 nfs41_init_sequence(args, res, cache_reply);
7c513058 779 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 780}
781
e73b83f2 782static inline
7c513058
BS		 783int nfs4_call_sync(struct rpc_clnt *clnt,
784 struct nfs_server *server,
e73b83f2
BS		 785 struct rpc_message *msg,
786 struct nfs4_sequence_args *args,
787 struct nfs4_sequence_res *res,
788 int cache_reply)
789{
7c513058
BS		 790 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
791 args, res, cache_reply);
e73b83f2 792}
cccef3b9 793
38478b24 794static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 795{
38478b24 796 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 797
38478b24 798 spin_lock(&dir->i_lock);
359d7d1c 799 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 800 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 801 nfs_force_lookup_revalidate(dir);
a9a4a87a 802 dir->i_version = cinfo->after;
38478b24 803 spin_unlock(&dir->i_lock);
1da177e4
LT		 804}
805
e56e0b78 806struct nfs4_opendata {
c6d00e63 807 struct kref kref;
e56e0b78
TM		 808 struct nfs_openargs o_arg;
809 struct nfs_openres o_res;
cdd4e68b
TM		 810 struct nfs_open_confirmargs c_arg;
811 struct nfs_open_confirmres c_res;
6926afd1
TM		 812 struct nfs4_string owner_name;
813 struct nfs4_string group_name;
e56e0b78 814 struct nfs_fattr f_attr;
e56e0b78 815 struct dentry *dir;
82a2c1b7 816 struct dentry *dentry;
e56e0b78 817 struct nfs4_state_owner *owner;
aac00a8d 818 struct nfs4_state *state;
e56e0b78 819 struct iattr attrs;
26e976a8 820 unsigned long timestamp;
3e309914 821 unsigned int rpc_done : 1;
24ac23ab
TM		 822 int rpc_status;
823 int cancelled;
e56e0b78
TM		 824};
825
2ced46c2
TM		 826
827static void nfs4_init_opendata_res(struct nfs4_opendata *p)
828{
829 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 830 p->o_res.seqid = p->o_arg.seqid;
831 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 832 p->o_res.server = p->o_arg.server;
833 nfs_fattr_init(&p->f_attr);
6926afd1 834 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 835}
836
82a2c1b7 837static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 838 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 839 const struct iattr *attrs,
840 gfp_t gfp_mask)
e56e0b78 841{
82a2c1b7 842 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 843 struct inode *dir = parent->d_inode;
844 struct nfs_server *server = NFS_SERVER(dir);
845 struct nfs4_opendata *p;
846
8535b2be 847 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 848 if (p == NULL)
849 goto err;
8535b2be 850 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 851 if (p->o_arg.seqid == NULL)
852 goto err_free;
82a2c1b7
AV		 853 nfs_sb_active(dentry->d_sb);
854 p->dentry = dget(dentry);
e56e0b78
TM		 855 p->dir = parent;
856 p->owner = sp;
857 atomic_inc(&sp->so_count);
858 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 859 p->o_arg.open_flags = flags;
860 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 861 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 862 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
863 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 864 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 865 p->o_arg.server = server;
866 p->o_arg.bitmask = server->attr_bitmask;
1549210f 867 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 868 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 869 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 870 __be32 verf[2];
d77d76ff 871
e56e0b78
TM		 872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 874
875 verf[0] = jiffies;
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
e56e0b78 879 }
cdd4e68b
TM		 880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 883 nfs4_init_opendata_res(p);
c6d00e63 884 kref_init(&p->kref);
e56e0b78
TM		 885 return p;
886err_free:
887 kfree(p);
888err:
889 dput(parent);
890 return NULL;
891}
892
c6d00e63 893static void nfs4_opendata_free(struct kref *kref)
e56e0b78 894{
c6d00e63
TM		 895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
82a2c1b7 897 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 898
899 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
c6d00e63
TM		 902 nfs4_put_state_owner(p->owner);
903 dput(p->dir);
82a2c1b7
AV		 904 dput(p->dentry);
905 nfs_sb_deactive(sb);
6926afd1 906 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 907 kfree(p);
908}
909
910static void nfs4_opendata_put(struct nfs4_opendata *p)
911{
912 if (p != NULL)
913 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 914}
915
06f814a3
TM		 916static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
917{
06f814a3
TM		 918 int ret;
919
06f814a3 920 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 921 return ret;
922}
923
dc0b027d 924static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 925{
926 int ret = 0;
dc0b027d 927
536e43d1 928 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 929 goto out;
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 931 case FMODE_READ:
88069f77
TM		 932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
6ee41268
TM		 934 break;
935 case FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
6ee41268
TM		 938 break;
939 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
6ee41268 942 }
dc0b027d 943out:
6ee41268
TM		 944 return ret;
945}
946
dc0b027d 947static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 948{
652f89f6
TM		 949 if (delegation == NULL)
950 return 0;
dc0b027d 951 if ((delegation->type & fmode) != fmode)
aac00a8d 952 return 0;
15c831bf 953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 954 return 0;
b7391f44 955 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 956 return 1;
957}
958
dc0b027d 959static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 960{
dc0b027d 961 switch (fmode) {
e7616923
TM		 962 case FMODE_WRITE:
963 state->n_wronly++;
964 break;
965 case FMODE_READ:
966 state->n_rdonly++;
967 break;
968 case FMODE_READ|FMODE_WRITE:
969 state->n_rdwr++;
970 }
dc0b027d 971 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 972}
973
dc0b027d 974static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 975{
976 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 977 nfs4_stateid_copy(&state->stateid, stateid);
978 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 979 switch (fmode) {
003707c7
TM		 980 case FMODE_READ:
981 set_bit(NFS_O_RDONLY_STATE, &state->flags);
982 break;
983 case FMODE_WRITE:
984 set_bit(NFS_O_WRONLY_STATE, &state->flags);
985 break;
986 case FMODE_READ|FMODE_WRITE:
987 set_bit(NFS_O_RDWR_STATE, &state->flags);
988 }
e7616923
TM		 989}
990
dc0b027d 991static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 992{
8bda4e4c 993 write_seqlock(&state->seqlock);
dc0b027d 994 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 995 write_sequnlock(&state->seqlock);
003707c7
TM		 996}
997
dc0b027d 998static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 999{
8bda4e4c
TM		 1000 /*
1001 * Protect the call to nfs4_state_set_mode_locked and
1002 * serialise the stateid update
1003 */
1004 write_seqlock(&state->seqlock);
003707c7 1005 if (deleg_stateid != NULL) {
f597c537 1006 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1007 set_bit(NFS_DELEGATED_STATE, &state->flags);
1008 }
1009 if (open_stateid != NULL)
dc0b027d 1010 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1011 write_sequnlock(&state->seqlock);
1012 spin_lock(&state->owner->so_lock);
dc0b027d 1013 update_open_stateflags(state, fmode);
ec073428 1014 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1015}
1016
dc0b027d 1017static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1018{
1019 struct nfs_inode *nfsi = NFS_I(state->inode);
1020 struct nfs_delegation *deleg_cur;
1021 int ret = 0;
1022
dc0b027d 1023 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1024
1025 rcu_read_lock();
1026 deleg_cur = rcu_dereference(nfsi->delegation);
1027 if (deleg_cur == NULL)
1028 goto no_delegation;
1029
1030 spin_lock(&deleg_cur->lock);
1031 if (nfsi->delegation != deleg_cur ||
dc0b027d 1032 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1033 goto no_delegation_unlock;
1034
1035 if (delegation == NULL)
1036 delegation = &deleg_cur->stateid;
f597c537 1037 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1038 goto no_delegation_unlock;
1039
b7391f44 1040 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1041 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1042 ret = 1;
1043no_delegation_unlock:
1044 spin_unlock(&deleg_cur->lock);
1045no_delegation:
1046 rcu_read_unlock();
1047
1048 if (!ret && open_stateid != NULL) {
dc0b027d 1049 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1050 ret = 1;
1051 }
1052
1053 return ret;
1054}
1055
1056
dc0b027d 1057static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1058{
1059 struct nfs_delegation *delegation;
1060
1061 rcu_read_lock();
1062 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1063 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1064 rcu_read_unlock();
1065 return;
1066 }
1067 rcu_read_unlock();
57ec14c5 1068 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1069}
1070
6ee41268 1071static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1072{
1073 struct nfs4_state *state = opendata->state;
1074 struct nfs_inode *nfsi = NFS_I(state->inode);
1075 struct nfs_delegation *delegation;
536e43d1 1076 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1077 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1078 nfs4_stateid stateid;
1079 int ret = -EAGAIN;
1080
aac00a8d 1081 for (;;) {
dc0b027d 1082 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1083 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1084 if (can_open_cached(state, fmode, open_mode)) {
1085 update_open_stateflags(state, fmode);
6ee41268 1086 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1087 goto out_return_state;
1088 }
1089 spin_unlock(&state->owner->so_lock);
1090 }
34310430
TM		 1091 rcu_read_lock();
1092 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1093 if (!can_open_delegated(delegation, fmode)) {
34310430 1094 rcu_read_unlock();
aac00a8d 1095 break;
34310430 1096 }
aac00a8d 1097 /* Save the delegation */
f597c537 1098 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1099 rcu_read_unlock();
af22f94a 1100 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1101 if (ret != 0)
1102 goto out;
1103 ret = -EAGAIN;
34310430
TM		 1104
1105 /* Try to update the stateid using the delegation */
dc0b027d 1106 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1107 goto out_return_state;
aac00a8d 1108 }
aac00a8d
TM		 1109out:
1110 return ERR_PTR(ret);
1111out_return_state:
1112 atomic_inc(&state->count);
1113 return state;
1114}
1115
24ac23ab
TM		 1116static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1117{
1118 struct inode *inode;
1119 struct nfs4_state *state = NULL;
003707c7 1120 struct nfs_delegation *delegation;
1b370bc2 1121 int ret;
24ac23ab 1122
aac00a8d 1123 if (!data->rpc_done) {
6ee41268 1124 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1125 goto out;
1126 }
1127
1b370bc2 1128 ret = -EAGAIN;
24ac23ab 1129 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1130 goto err;
24ac23ab 1131 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1132 ret = PTR_ERR(inode);
03f28e3a 1133 if (IS_ERR(inode))
1b370bc2
TM		 1134 goto err;
1135 ret = -ENOMEM;
24ac23ab
TM		 1136 state = nfs4_get_open_state(inode, data->owner);
1137 if (state == NULL)
1b370bc2 1138 goto err_put_inode;
549d6ed5 1139 if (data->o_res.delegation_type != 0) {
4e0038b6 1140 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1141 int delegation_flags = 0;
1142
003707c7
TM		 1143 rcu_read_lock();
1144 delegation = rcu_dereference(NFS_I(inode)->delegation);
1145 if (delegation)
1146 delegation_flags = delegation->flags;
1147 rcu_read_unlock();
652f89f6
TM		 1148 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1149 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1150 "returning a delegation for "
1151 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1152 clp->cl_hostname);
652f89f6 1153 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1154 nfs_inode_set_delegation(state->inode,
1155 data->owner->so_cred,
1156 &data->o_res);
1157 else
1158 nfs_inode_reclaim_delegation(state->inode,
1159 data->owner->so_cred,
1160 &data->o_res);
1161 }
34310430
TM		 1162
1163 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1164 data->o_arg.fmode);
24ac23ab 1165 iput(inode);
aac00a8d 1166out:
24ac23ab 1167 return state;
1b370bc2
TM		 1168err_put_inode:
1169 iput(inode);
1170err:
1171 return ERR_PTR(ret);
24ac23ab
TM		 1172}
1173
864472e9
TM		 1174static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1175{
1176 struct nfs_inode *nfsi = NFS_I(state->inode);
1177 struct nfs_open_context *ctx;
1178
1179 spin_lock(&state->inode->i_lock);
1180 list_for_each_entry(ctx, &nfsi->open_files, list) {
1181 if (ctx->state != state)
1182 continue;
1183 get_nfs_open_context(ctx);
1184 spin_unlock(&state->inode->i_lock);
1185 return ctx;
1186 }
1187 spin_unlock(&state->inode->i_lock);
1188 return ERR_PTR(-ENOENT);
1189}
1190
6f220ed5
TM		 1191static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1192{
1193 struct nfs4_opendata *opendata;
1194
3d4ff43d 1195 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1196 if (opendata == NULL)
1197 return ERR_PTR(-ENOMEM);
1198 opendata->state = state;
1199 atomic_inc(&state->count);
1200 return opendata;
1201}
1202
dc0b027d 1203static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1204{
2ced46c2 1205 struct nfs4_state *newstate;
864472e9
TM		 1206 int ret;
1207
dc0b027d
TM		 1208 opendata->o_arg.open_flags = 0;
1209 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1210 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1211 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1212 nfs4_init_opendata_res(opendata);
b257957e 1213 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1214 if (ret != 0)
1215 return ret;
2ced46c2 1216 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1217 if (IS_ERR(newstate))
1218 return PTR_ERR(newstate);
643168c2 1219 nfs4_close_state(newstate, fmode);
2ced46c2 1220 *res = newstate;
864472e9
TM		 1221 return 0;
1222}
1223
1224static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1225{
864472e9 1226 struct nfs4_state *newstate;
864472e9
TM		 1227 int ret;
1228
1229 /* memory barrier prior to reading state->n_* */
2ced46c2 1230 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1231 smp_rmb();
1232 if (state->n_rdwr != 0) {
b0ed9dbc 1233 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1234 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1235 if (ret != 0)
1236 return ret;
2ced46c2
TM		 1237 if (newstate != state)
1238 return -ESTALE;
864472e9
TM		 1239 }
1240 if (state->n_wronly != 0) {
b0ed9dbc 1241 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1242 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1243 if (ret != 0)
1244 return ret;
2ced46c2
TM		 1245 if (newstate != state)
1246 return -ESTALE;
864472e9
TM		 1247 }
1248 if (state->n_rdonly != 0) {
b0ed9dbc 1249 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1250 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1251 if (ret != 0)
1252 return ret;
2ced46c2
TM		 1253 if (newstate != state)
1254 return -ESTALE;
864472e9 1255 }
1ac7e2fd
TM		 1256 /*
1257 * We may have performed cached opens for all three recoveries.
1258 * Check if we need to update the current stateid.
1259 */
1260 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1261 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1262 write_seqlock(&state->seqlock);
1ac7e2fd 1263 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1264 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1265 write_sequnlock(&state->seqlock);
1ac7e2fd 1266 }
864472e9
TM		 1267 return 0;
1268}
1269
1da177e4
LT		 1270/*
1271 * OPEN_RECLAIM:
1272 * reclaim state on the server after a reboot.
1da177e4 1273 */
539cd03a 1274static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1275{
1ac7e2fd 1276 struct nfs_delegation *delegation;
864472e9 1277 struct nfs4_opendata *opendata;
dc0b027d 1278 fmode_t delegation_type = 0;
1da177e4
LT		 1279 int status;
1280
6f220ed5
TM		 1281 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1282 if (IS_ERR(opendata))
1283 return PTR_ERR(opendata);
864472e9
TM		 1284 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1285 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1286 rcu_read_lock();
1287 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1288 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1289 delegation_type = delegation->type;
1ac7e2fd 1290 rcu_read_unlock();
864472e9
TM		 1291 opendata->o_arg.u.delegation_type = delegation_type;
1292 status = nfs4_open_recover(opendata, state);
c6d00e63 1293 nfs4_opendata_put(opendata);
1da177e4
LT		 1294 return status;
1295}
1296
539cd03a 1297static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1298{
1299 struct nfs_server *server = NFS_SERVER(state->inode);
1300 struct nfs4_exception exception = { };
1301 int err;
1302 do {
539cd03a 1303 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1304 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1305 break;
1306 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1307 } while (exception.retry);
1308 return err;
1309}
1310
864472e9
TM		 1311static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1312{
1313 struct nfs_open_context *ctx;
1314 int ret;
1315
1316 ctx = nfs4_state_find_open_context(state);
1317 if (IS_ERR(ctx))
1318 return PTR_ERR(ctx);
539cd03a 1319 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1320 put_nfs_open_context(ctx);
1321 return ret;
1322}
1323
13437e12 1324static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1325{
e56e0b78 1326 struct nfs4_opendata *opendata;
864472e9 1327 int ret;
1da177e4 1328
6f220ed5
TM		 1329 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1330 if (IS_ERR(opendata))
1331 return PTR_ERR(opendata);
e56e0b78 1332 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1333 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1334 ret = nfs4_open_recover(opendata, state);
c6d00e63 1335 nfs4_opendata_put(opendata);
864472e9 1336 return ret;
1da177e4
LT		 1337}
1338
13437e12 1339int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1340{
1341 struct nfs4_exception exception = { };
539cd03a 1342 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1343 int err;
1344 do {
13437e12 1345 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1346 switch (err) {
1347 case 0:
965b5d67
TM		 1348 case -ENOENT:
1349 case -ESTALE:
1350 goto out;
bcfa49f6
RL		 1351 case -NFS4ERR_BADSESSION:
1352 case -NFS4ERR_BADSLOT:
1353 case -NFS4ERR_BAD_HIGH_SLOT:
1354 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1355 case -NFS4ERR_DEADSESSION:
9f594791 1356 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1357 goto out;
1da177e4
LT		 1358 case -NFS4ERR_STALE_CLIENTID:
1359 case -NFS4ERR_STALE_STATEID:
1360 case -NFS4ERR_EXPIRED:
1361 /* Don't recall a delegation if it was lost */
0400a6b0 1362 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1363 goto out;
1364 case -ERESTARTSYS:
1365 /*
1366 * The show must go on: exit, but mark the
1367 * stateid as needing recovery.
1368 */
a1d0b5ee 1369 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1370 case -NFS4ERR_ADMIN_REVOKED:
1371 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1372 nfs_inode_find_state_and_recover(state->inode,
1373 stateid);
0400a6b0 1374 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1375 case -EKEYEXPIRED:
1376 /*
1377 * User RPCSEC_GSS context has expired.
1378 * We cannot recover this stateid now, so
1379 * skip it and allow recovery thread to
1380 * proceed.
1381 */
965b5d67
TM		 1382 case -ENOMEM:
1383 err = 0;
1384 goto out;
1da177e4
LT		 1385 }
1386 err = nfs4_handle_exception(server, err, &exception);
1387 } while (exception.retry);
965b5d67 1388out:
1da177e4
LT		 1389 return err;
1390}
1391
cdd4e68b
TM		 1392static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1393{
1394 struct nfs4_opendata *data = calldata;
1395
1396 data->rpc_status = task->tk_status;
26e976a8 1397 if (data->rpc_status == 0) {
f597c537 1398 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1399 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1400 renew_lease(data->o_res.server, data->timestamp);
3e309914 1401 data->rpc_done = 1;
26e976a8 1402 }
cdd4e68b
TM		 1403}
1404
1405static void nfs4_open_confirm_release(void *calldata)
1406{
1407 struct nfs4_opendata *data = calldata;
1408 struct nfs4_state *state = NULL;
1409
1410 /* If this request hasn't been cancelled, do nothing */
1411 if (data->cancelled == 0)
1412 goto out_free;
1413 /* In case of error, no cleanup! */
3e309914 1414 if (!data->rpc_done)
cdd4e68b 1415 goto out_free;
cdd4e68b 1416 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1417 if (!IS_ERR(state))
643168c2 1418 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1419out_free:
c6d00e63 1420 nfs4_opendata_put(data);
cdd4e68b
TM		 1421}
1422
1423static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1424 .rpc_call_done = nfs4_open_confirm_done,
1425 .rpc_release = nfs4_open_confirm_release,
1426};
1427
1428/*
1429 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1430 */
1431static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1432{
1433 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1434 struct rpc_task *task;
5138fde0
TM		 1435 struct rpc_message msg = {
1436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1437 .rpc_argp = &data->c_arg,
1438 .rpc_resp = &data->c_res,
1439 .rpc_cred = data->owner->so_cred,
1440 };
c970aa85
TM		 1441 struct rpc_task_setup task_setup_data = {
1442 .rpc_client = server->client,
5138fde0 1443 .rpc_message = &msg,
c970aa85
TM		 1444 .callback_ops = &nfs4_open_confirm_ops,
1445 .callback_data = data,
101070ca 1446 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1447 .flags = RPC_TASK_ASYNC,
1448 };
1da177e4
LT		 1449 int status;
1450
c6d00e63 1451 kref_get(&data->kref);
3e309914
TM		 1452 data->rpc_done = 0;
1453 data->rpc_status = 0;
5138fde0 1454 data->timestamp = jiffies;
c970aa85 1455 task = rpc_run_task(&task_setup_data);
7a1218a2 1456 if (IS_ERR(task))
cdd4e68b 1457 return PTR_ERR(task);
cdd4e68b
TM		 1458 status = nfs4_wait_for_completion_rpc_task(task);
1459 if (status != 0) {
1460 data->cancelled = 1;
1461 smp_wmb();
1462 } else
1463 status = data->rpc_status;
e6b3c4db 1464 rpc_put_task(task);
1da177e4
LT		 1465 return status;
1466}
1467
24ac23ab 1468static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1469{
24ac23ab
TM		 1470 struct nfs4_opendata *data = calldata;
1471 struct nfs4_state_owner *sp = data->owner;
5138fde0 1472
24ac23ab
TM		 1473 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1474 return;
aac00a8d
TM		 1475 /*
1476 * Check if we still need to send an OPEN call, or if we can use
1477 * a delegation instead.
1478 */
1479 if (data->state != NULL) {
1480 struct nfs_delegation *delegation;
1481
dc0b027d 1482 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1483 goto out_no_action;
aac00a8d
TM		 1484 rcu_read_lock();
1485 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1486 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1487 can_open_delegated(delegation, data->o_arg.fmode))
1488 goto unlock_no_action;
aac00a8d
TM		 1489 rcu_read_unlock();
1490 }
95b72eb0 1491 /* Update client id. */
1f0e890d 1492 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1493 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1494 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1495 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1496 }
26e976a8 1497 data->timestamp = jiffies;
035168ab 1498 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1499 &data->o_arg.seq_args,
9d12b216 1500 &data->o_res.seq_res, task))
d898528c 1501 return;
5138fde0 1502 rpc_call_start(task);
6ee41268 1503 return;
652f89f6
TM		 1504unlock_no_action:
1505 rcu_read_unlock();
6ee41268
TM		 1506out_no_action:
1507 task->tk_action = NULL;
1508
24ac23ab 1509}
1da177e4 1510
b257957e
AB		 1511static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1512{
1513 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1514 nfs4_open_prepare(task, calldata);
1515}
1516
24ac23ab
TM		 1517static void nfs4_open_done(struct rpc_task *task, void *calldata)
1518{
1519 struct nfs4_opendata *data = calldata;
1da177e4 1520
24ac23ab 1521 data->rpc_status = task->tk_status;
d898528c 1522
14516c3a
TM		 1523 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1524 return;
d898528c 1525
24ac23ab
TM		 1526 if (task->tk_status == 0) {
1527 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1528 case S_IFREG:
1529 break;
1530 case S_IFLNK:
24ac23ab 1531 data->rpc_status = -ELOOP;
6f926b5b
TM		 1532 break;
1533 case S_IFDIR:
24ac23ab 1534 data->rpc_status = -EISDIR;
6f926b5b
TM		 1535 break;
1536 default:
24ac23ab 1537 data->rpc_status = -ENOTDIR;
6f926b5b 1538 }
26e976a8 1539 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1540 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1541 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1542 }
3e309914 1543 data->rpc_done = 1;
24ac23ab 1544}
6f926b5b 1545
24ac23ab
TM		 1546static void nfs4_open_release(void *calldata)
1547{
1548 struct nfs4_opendata *data = calldata;
1549 struct nfs4_state *state = NULL;
1550
1551 /* If this request hasn't been cancelled, do nothing */
1552 if (data->cancelled == 0)
1553 goto out_free;
1554 /* In case of error, no cleanup! */
3e309914 1555 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1556 goto out_free;
1557 /* In case we need an open_confirm, no cleanup! */
1558 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1559 goto out_free;
24ac23ab 1560 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1561 if (!IS_ERR(state))
643168c2 1562 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1563out_free:
c6d00e63 1564 nfs4_opendata_put(data);
24ac23ab
TM		 1565}
1566
1567static const struct rpc_call_ops nfs4_open_ops = {
1568 .rpc_call_prepare = nfs4_open_prepare,
1569 .rpc_call_done = nfs4_open_done,
1570 .rpc_release = nfs4_open_release,
1571};
1572
b257957e
AB		 1573static const struct rpc_call_ops nfs4_recover_open_ops = {
1574 .rpc_call_prepare = nfs4_recover_open_prepare,
1575 .rpc_call_done = nfs4_open_done,
1576 .rpc_release = nfs4_open_release,
1577};
1578
1579static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1580{
1581 struct inode *dir = data->dir->d_inode;
1582 struct nfs_server *server = NFS_SERVER(dir);
1583 struct nfs_openargs *o_arg = &data->o_arg;
1584 struct nfs_openres *o_res = &data->o_res;
1585 struct rpc_task *task;
5138fde0
TM		 1586 struct rpc_message msg = {
1587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1588 .rpc_argp = o_arg,
1589 .rpc_resp = o_res,
1590 .rpc_cred = data->owner->so_cred,
1591 };
c970aa85
TM		 1592 struct rpc_task_setup task_setup_data = {
1593 .rpc_client = server->client,
5138fde0 1594 .rpc_message = &msg,
c970aa85
TM		 1595 .callback_ops = &nfs4_open_ops,
1596 .callback_data = data,
101070ca 1597 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1598 .flags = RPC_TASK_ASYNC,
1599 };
24ac23ab
TM		 1600 int status;
1601
9d12b216 1602 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1603 kref_get(&data->kref);
3e309914
TM		 1604 data->rpc_done = 0;
1605 data->rpc_status = 0;
2ced46c2 1606 data->cancelled = 0;
b257957e
AB		 1607 if (isrecover)
1608 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1609 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1610 if (IS_ERR(task))
1611 return PTR_ERR(task);
1612 status = nfs4_wait_for_completion_rpc_task(task);
1613 if (status != 0) {
1614 data->cancelled = 1;
1615 smp_wmb();
1616 } else
1617 status = data->rpc_status;
1618 rpc_put_task(task);
1619
1620 return status;
1621}
1622
1623static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1624{
1625 struct inode *dir = data->dir->d_inode;
1626 struct nfs_openres *o_res = &data->o_res;
1627 int status;
1628
1629 status = nfs4_run_open_task(data, 1);
1630 if (status != 0 || !data->rpc_done)
1631 return status;
1632
6926afd1
TM		 1633 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1634
b257957e
AB		 1635 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1636 status = _nfs4_proc_open_confirm(data);
1637 if (status != 0)
1638 return status;
1639 }
1640
1641 return status;
1642}
1643
1644/*
1645 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1646 */
1647static int _nfs4_proc_open(struct nfs4_opendata *data)
1648{
1649 struct inode *dir = data->dir->d_inode;
1650 struct nfs_server *server = NFS_SERVER(dir);
1651 struct nfs_openargs *o_arg = &data->o_arg;
1652 struct nfs_openres *o_res = &data->o_res;
1653 int status;
1654
1655 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1656 if (!data->rpc_done)
1657 return status;
1658 if (status != 0) {
1659 if (status == -NFS4ERR_BADNAME &&
1660 !(o_arg->open_flags & O_CREAT))
1661 return -ENOENT;
24ac23ab 1662 return status;
08ef7bd3 1663 }
24ac23ab 1664
6926afd1
TM		 1665 nfs_fattr_map_and_free_names(server, &data->f_attr);
1666
90ff0c54 1667 if (o_arg->open_flags & O_CREAT)
56ae19f3 1668 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1669 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1670 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1671 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1672 status = _nfs4_proc_open_confirm(data);
1da177e4 1673 if (status != 0)
24ac23ab 1674 return status;
1da177e4
LT		 1675 }
1676 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1677 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1678 return 0;
1da177e4
LT		 1679}
1680
d83217c1 1681static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1682{
a78cb57a 1683 unsigned int loop;
6b30954e 1684 int ret;
58d9714a 1685
a78cb57a 1686 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1687 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1688 if (ret != 0)
a78cb57a 1689 break;
e598d843
TM		 1690 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1691 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1692 break;
0400a6b0 1693 nfs4_schedule_state_manager(clp);
a78cb57a 1694 ret = -EIO;
6b30954e 1695 }
a78cb57a 1696 return ret;
58d9714a
TM		 1697}
1698
d83217c1
AA		 1699static int nfs4_recover_expired_lease(struct nfs_server *server)
1700{
1701 return nfs4_client_recover_expired_lease(server->nfs_client);
1702}
1703
1da177e4
LT		 1704/*
1705 * OPEN_EXPIRED:
1706 * reclaim state on the server after a network partition.
1707 * Assumes caller holds the appropriate lock
1708 */
539cd03a 1709static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1710{
e56e0b78 1711 struct nfs4_opendata *opendata;
864472e9 1712 int ret;
1da177e4 1713
6f220ed5
TM		 1714 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1715 if (IS_ERR(opendata))
1716 return PTR_ERR(opendata);
864472e9 1717 ret = nfs4_open_recover(opendata, state);
35d05778 1718 if (ret == -ESTALE)
3d4ff43d 1719 d_drop(ctx->dentry);
c6d00e63 1720 nfs4_opendata_put(opendata);
864472e9 1721 return ret;
1da177e4
LT		 1722}
1723
a9ed2e25 1724static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1725{
539cd03a 1726 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1727 struct nfs4_exception exception = { };
1728 int err;
1729
1730 do {
539cd03a 1731 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1732 switch (err) {
1733 default:
1734 goto out;
1735 case -NFS4ERR_GRACE:
1736 case -NFS4ERR_DELAY:
1737 nfs4_handle_exception(server, err, &exception);
1738 err = 0;
1739 }
202b50dc 1740 } while (exception.retry);
a9ed2e25 1741out:
202b50dc
TM		 1742 return err;
1743}
1744
1da177e4
LT		 1745static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1746{
1da177e4 1747 struct nfs_open_context *ctx;
864472e9 1748 int ret;
1da177e4 1749
864472e9
TM		 1750 ctx = nfs4_state_find_open_context(state);
1751 if (IS_ERR(ctx))
1752 return PTR_ERR(ctx);
539cd03a 1753 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1754 put_nfs_open_context(ctx);
1755 return ret;
1da177e4
LT		 1756}
1757
f062eb6c 1758#if defined(CONFIG_NFS_V4_1)
b01dd1d8 1759static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
f062eb6c 1760{
b01dd1d8 1761 int status = NFS_OK;
f062eb6c
BS		 1762 struct nfs_server *server = NFS_SERVER(state->inode);
1763
b01dd1d8
BS		 1764 if (state->flags & flags) {
1765 status = nfs41_test_stateid(server, stateid);
1766 if (status != NFS_OK) {
89af2739
CL		 1767 if (status != -NFS4ERR_BAD_STATEID)
1768 nfs41_free_stateid(server, stateid);
b01dd1d8
BS		 1769 state->flags &= ~flags;
1770 }
1771 }
1772 return status;
1773}
1774
1775static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1776{
1777 int deleg_status, open_status;
1778 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1779 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1780
1781 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1782 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1783
1784 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1785 return NFS_OK;
f062eb6c
BS		 1786 return nfs4_open_expired(sp, state);
1787}
1788#endif
1789
aa53ed54
JL		 1790/*
1791 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1792 * fields corresponding to attributes that were used to store the verifier.
1793 * Make sure we clobber those fields in the later setattr call
1794 */
1795static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1796{
1797 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1798 !(sattr->ia_valid & ATTR_ATIME_SET))
1799 sattr->ia_valid |= ATTR_ATIME;
1800
1801 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1802 !(sattr->ia_valid & ATTR_MTIME_SET))
1803 sattr->ia_valid |= ATTR_MTIME;
1804}
1805
1da177e4 1806/*
24ac23ab 1807 * Returns a referenced nfs4_state
1da177e4 1808 */
82be417a
AA		 1809static int _nfs4_do_open(struct inode *dir,
1810 struct dentry *dentry,
1811 fmode_t fmode,
1812 int flags,
1813 struct iattr *sattr,
1814 struct rpc_cred *cred,
1815 struct nfs4_state **res,
1816 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1817{
1818 struct nfs4_state_owner *sp;
1819 struct nfs4_state *state = NULL;
1820 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1821 struct nfs4_opendata *opendata;
aac00a8d 1822 int status;
1da177e4
LT		 1823
1824 /* Protect against reboot recovery conflicts */
1da177e4 1825 status = -ENOMEM;
d1e284d5
TM		 1826 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1827 if (sp == NULL) {
1da177e4
LT		 1828 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1829 goto out_err;
1830 }
58d9714a
TM		 1831 status = nfs4_recover_expired_lease(server);
1832 if (status != 0)
b4454fe1 1833 goto err_put_state_owner;
82a2c1b7
AV		 1834 if (dentry->d_inode != NULL)
1835 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1836 status = -ENOMEM;
82a2c1b7 1837 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1838 if (opendata == NULL)
95d35cb4 1839 goto err_put_state_owner;
1da177e4 1840
82be417a
AA		 1841 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1842 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1843 if (!opendata->f_attr.mdsthreshold)
1844 goto err_opendata_put;
1549210f 1845 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1846 }
82a2c1b7
AV		 1847 if (dentry->d_inode != NULL)
1848 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1849
24ac23ab 1850 status = _nfs4_proc_open(opendata);
1da177e4 1851 if (status != 0)
c6d00e63 1852 goto err_opendata_put;
1da177e4 1853
24ac23ab 1854 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1855 status = PTR_ERR(state);
1856 if (IS_ERR(state))
c6d00e63 1857 goto err_opendata_put;
0df5dd4a 1858 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1859 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1860
1861 if (opendata->o_arg.open_flags & O_EXCL) {
1862 nfs4_exclusive_attrset(opendata, sattr);
1863
1864 nfs_fattr_init(opendata->o_res.f_attr);
1865 status = nfs4_do_setattr(state->inode, cred,
1866 opendata->o_res.f_attr, sattr,
1867 state);
1868 if (status == 0)
1869 nfs_setattr_update_inode(state->inode, sattr);
1870 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1871 }
82be417a
AA		 1872
1873 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1874 *ctx_th = opendata->f_attr.mdsthreshold;
1875 else
1876 kfree(opendata->f_attr.mdsthreshold);
1877 opendata->f_attr.mdsthreshold = NULL;
1878
c6d00e63 1879 nfs4_opendata_put(opendata);
1da177e4 1880 nfs4_put_state_owner(sp);
1da177e4
LT		 1881 *res = state;
1882 return 0;
c6d00e63 1883err_opendata_put:
82be417a 1884 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1885 nfs4_opendata_put(opendata);
e56e0b78
TM		 1886err_put_state_owner:
1887 nfs4_put_state_owner(sp);
1da177e4 1888out_err:
1da177e4
LT		 1889 *res = NULL;
1890 return status;
1891}
1892
1893
82be417a
AA		 1894static struct nfs4_state *nfs4_do_open(struct inode *dir,
1895 struct dentry *dentry,
1896 fmode_t fmode,
1897 int flags,
1898 struct iattr *sattr,
1899 struct rpc_cred *cred,
1900 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1901{
1902 struct nfs4_exception exception = { };
1903 struct nfs4_state *res;
1904 int status;
1905
2d0dbc6a 1906 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1907 do {
82be417a
AA		 1908 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1909 &res, ctx_th);
1da177e4
LT		 1910 if (status == 0)
1911 break;
1912 /* NOTE: BAD_SEQID means the server and client disagree about the
1913 * book-keeping w.r.t. state-changing operations
1914 * (OPEN/CLOSE/LOCK/LOCKU...)
1915 * It is actually a sign of a bug on the client or on the server.
1916 *
1917 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1918 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1919 * have unhashed the old state_owner for us, and that we can
1920 * therefore safely retry using a new one. We should still warn
1921 * the user though...
1922 */
1923 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1924 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1925 " returned a bad sequence-id error!\n",
1926 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1927 exception.retry = 1;
1928 continue;
1929 }
550f5747
TM		 1930 /*
1931 * BAD_STATEID on OPEN means that the server cancelled our
1932 * state before it received the OPEN_CONFIRM.
1933 * Recover by retrying the request as per the discussion
1934 * on Page 181 of RFC3530.
1935 */
1936 if (status == -NFS4ERR_BAD_STATEID) {
1937 exception.retry = 1;
1938 continue;
1939 }
aac00a8d
TM		 1940 if (status == -EAGAIN) {
1941 /* We must have found a delegation */
1942 exception.retry = 1;
1943 continue;
1944 }
1da177e4
LT		 1945 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1946 status, &exception));
1947 } while (exception.retry);
1948 return res;
1949}
1950
659bfcd6
TM		 1951static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1952 struct nfs_fattr *fattr, struct iattr *sattr,
1953 struct nfs4_state *state)
1da177e4 1954{
3e4f6290 1955 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1956 struct nfs_setattrargs arg = {
3e4f6290 1957 .fh = NFS_FH(inode),
1da177e4
LT		 1958 .iap = sattr,
1959 .server = server,
1960 .bitmask = server->attr_bitmask,
1961 };
1962 struct nfs_setattrres res = {
1963 .fattr = fattr,
1964 .server = server,
1965 };
1966 struct rpc_message msg = {
659bfcd6
TM		 1967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1968 .rpc_argp = &arg,
1969 .rpc_resp = &res,
1970 .rpc_cred = cred,
1da177e4 1971 };
26e976a8 1972 unsigned long timestamp = jiffies;
65e4308d 1973 int status;
1da177e4 1974
0e574af1 1975 nfs_fattr_init(fattr);
1da177e4 1976
4fc8796d
TM		 1977 if (state != NULL) {
1978 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1979 current->files, current->tgid);
1980 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1981 FMODE_WRITE)) {
3e4f6290 1982 /* Use that stateid */
08e9eac4 1983 } else
f597c537 1984 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1985
7c513058 1986 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1987 if (status == 0 && state != NULL)
1988 renew_lease(server, timestamp);
65e4308d 1989 return status;
1da177e4
LT		 1990}
1991
659bfcd6
TM		 1992static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1993 struct nfs_fattr *fattr, struct iattr *sattr,
1994 struct nfs4_state *state)
1da177e4 1995{
3e4f6290 1996 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1997 struct nfs4_exception exception = {
1998 .state = state,
3114ea7a 1999 .inode = inode,
a1d0b5ee 2000 };
1da177e4
LT		 2001 int err;
2002 do {
451146be
TM		 2003 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2004 switch (err) {
2005 case -NFS4ERR_OPENMODE:
2006 if (state && !(state->state & FMODE_WRITE)) {
2007 err = -EBADF;
2008 if (sattr->ia_valid & ATTR_OPEN)
2009 err = -EACCES;
2010 goto out;
2011 }
2012 }
2013 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2014 } while (exception.retry);
451146be 2015out:
1da177e4
LT		 2016 return err;
2017}
2018
2019struct nfs4_closedata {
2020 struct inode *inode;
2021 struct nfs4_state *state;
2022 struct nfs_closeargs arg;
2023 struct nfs_closeres res;
516a6af6 2024 struct nfs_fattr fattr;
26e976a8 2025 unsigned long timestamp;
f7e8917a
FI		 2026 bool roc;
2027 u32 roc_barrier;
1da177e4
LT		 2028};
2029
963d8fe5 2030static void nfs4_free_closedata(void *data)
9512135d 2031{
963d8fe5
TM		 2032 struct nfs4_closedata *calldata = data;
2033 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2034 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2035
f7e8917a
FI		 2036 if (calldata->roc)
2037 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2038 nfs4_put_open_state(calldata->state);
2039 nfs_free_seqid(calldata->arg.seqid);
9512135d 2040 nfs4_put_state_owner(sp);
643168c2 2041 nfs_sb_deactive(sb);
9512135d
TM		 2042 kfree(calldata);
2043}
2044
88069f77
TM		 2045static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2046 fmode_t fmode)
2047{
2048 spin_lock(&state->owner->so_lock);
2049 if (!(fmode & FMODE_READ))
2050 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2051 if (!(fmode & FMODE_WRITE))
2052 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2053 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2054 spin_unlock(&state->owner->so_lock);
2055}
2056
963d8fe5 2057static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2058{
963d8fe5 2059 struct nfs4_closedata *calldata = data;
1da177e4 2060 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2061 struct nfs_server *server = NFS_SERVER(calldata->inode);
2062
a3ca5651 2063 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2064 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2065 return;
1da177e4
LT		 2066 /* hmm. we are done with the inode, and in the process of freeing
2067 * the state_owner. we keep this around to process errors
2068 */
1da177e4
LT		 2069 switch (task->tk_status) {
2070 case 0:
f7e8917a
FI		 2071 if (calldata->roc)
2072 pnfs_roc_set_barrier(state->inode,
2073 calldata->roc_barrier);
45328c35 2074 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2075 renew_lease(server, calldata->timestamp);
88069f77
TM		 2076 nfs4_close_clear_stateid_flags(state,
2077 calldata->arg.fmode);
1da177e4
LT		 2078 break;
2079 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2080 case -NFS4ERR_OLD_STATEID:
2081 case -NFS4ERR_BAD_STATEID:
1da177e4 2082 case -NFS4ERR_EXPIRED:
dc0b027d 2083 if (calldata->arg.fmode == 0)
9e33bed5 2084 break;
1da177e4 2085 default:
72211dbe
TM		 2086 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2087 rpc_restart_call_prepare(task);
1da177e4 2088 }
72211dbe 2089 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2090 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2091 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2092}
2093
4ce70ada 2094static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2095{
4ce70ada 2096 struct nfs4_closedata *calldata = data;
9512135d 2097 struct nfs4_state *state = calldata->state;
88069f77 2098 int call_close = 0;
9512135d 2099
a3ca5651 2100 dprintk("%s: begin!\n", __func__);
963d8fe5 2101 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2102 return;
003707c7 2103
88069f77
TM		 2104 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2105 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2106 spin_lock(&state->owner->so_lock);
003707c7 2107 /* Calculate the change in open mode */
e7616923 2108 if (state->n_rdwr == 0) {
003707c7 2109 if (state->n_rdonly == 0) {
88069f77
TM		 2110 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2111 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2112 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2113 }
2114 if (state->n_wronly == 0) {
88069f77
TM		 2115 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2116 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2117 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2118 }
e7616923 2119 }
4cecb76f 2120 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2121
2122 if (!call_close) {
963d8fe5
TM		 2123 /* Note: exit _without_ calling nfs4_close_done */
2124 task->tk_action = NULL;
a3ca5651 2125 goto out;
9512135d 2126 }
88069f77 2127
f7e8917a 2128 if (calldata->arg.fmode == 0) {
88069f77 2129 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2130 if (calldata->roc &&
2131 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2132 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2133 task, NULL);
a3ca5651 2134 goto out;
f7e8917a
FI		 2135 }
2136 }
88069f77 2137
516a6af6 2138 nfs_fattr_init(calldata->res.fattr);
26e976a8 2139 calldata->timestamp = jiffies;
035168ab 2140 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2141 &calldata->arg.seq_args,
2142 &calldata->res.seq_res,
2143 task))
a3ca5651 2144 goto out;
5138fde0 2145 rpc_call_start(task);
a3ca5651
CL		 2146out:
2147 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2148}
2149
963d8fe5 2150static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2151 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2152 .rpc_call_done = nfs4_close_done,
2153 .rpc_release = nfs4_free_closedata,
2154};
2155
1da177e4
LT		 2156/*
2157 * It is possible for data to be read/written from a mem-mapped file
2158 * after the sys_close call (which hits the vfs layer as a flush).
2159 * This means that we can't safely call nfsv4 close on a file until
2160 * the inode is cleared. This in turn means that we are not good
2161 * NFSv4 citizens - we do not indicate to the server to update the file's
2162 * share state even when we are done with one of the three share
2163 * stateid's in the inode.
2164 *
2165 * NOTE: Caller must be holding the sp->so_owner semaphore!
2166 */
643168c2 2167int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2168{
4a35bd41 2169 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2170 struct nfs4_closedata *calldata;
b39e625b
TM		 2171 struct nfs4_state_owner *sp = state->owner;
2172 struct rpc_task *task;
5138fde0
TM		 2173 struct rpc_message msg = {
2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2175 .rpc_cred = state->owner->so_cred,
2176 };
c970aa85
TM		 2177 struct rpc_task_setup task_setup_data = {
2178 .rpc_client = server->client,
5138fde0 2179 .rpc_message = &msg,
c970aa85 2180 .callback_ops = &nfs4_close_ops,
101070ca 2181 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2182 .flags = RPC_TASK_ASYNC,
2183 };
9512135d 2184 int status = -ENOMEM;
1da177e4 2185
8535b2be 2186 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2187 if (calldata == NULL)
9512135d 2188 goto out;
9d12b216 2189 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2190 calldata->inode = state->inode;
1da177e4 2191 calldata->state = state;
4a35bd41 2192 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2193 calldata->arg.stateid = &state->open_stateid;
1da177e4 2194 /* Serialization for the sequence id */
8535b2be 2195 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2196 if (calldata->arg.seqid == NULL)
2197 goto out_free_calldata;
dc0b027d 2198 calldata->arg.fmode = 0;
a65318bf 2199 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2200 calldata->res.fattr = &calldata->fattr;
c1d51931 2201 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2202 calldata->res.server = server;
f7e8917a 2203 calldata->roc = roc;
643168c2 2204 nfs_sb_active(calldata->inode->i_sb);
9512135d 2205
1174dd1f
TM		 2206 msg.rpc_argp = &calldata->arg;
2207 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2208 task_setup_data.callback_data = calldata;
2209 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2210 if (IS_ERR(task))
2211 return PTR_ERR(task);
a49c3c77
TM		 2212 status = 0;
2213 if (wait)
2214 status = rpc_wait_for_completion_task(task);
b39e625b 2215 rpc_put_task(task);
a49c3c77 2216 return status;
9512135d
TM		 2217out_free_calldata:
2218 kfree(calldata);
2219out:
f7e8917a
FI		 2220 if (roc)
2221 pnfs_roc_release(state->inode);
b39e625b
TM		 2222 nfs4_put_open_state(state);
2223 nfs4_put_state_owner(sp);
9512135d 2224 return status;
1da177e4
LT		 2225}
2226
2b484297 2227static struct inode *
cd9a1c0e 2228nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2229{
1da177e4 2230 struct nfs4_state *state;
1da177e4 2231
565277f6 2232 /* Protect against concurrent sillydeletes */
82be417a
AA		 2233 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2234 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2235 if (IS_ERR(state))
2236 return ERR_CAST(state);
cd9a1c0e 2237 ctx->state = state;
f46e0bd3 2238 return igrab(state->inode);
1da177e4
LT		 2239}
2240
1185a552 2241static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2242{
2243 if (ctx->state == NULL)
2244 return;
2245 if (is_sync)
643168c2 2246 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2247 else
643168c2 2248 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2249}
1da177e4
LT		 2250
2251static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2252{
43652ad5
BH		 2253 struct nfs4_server_caps_arg args = {
2254 .fhandle = fhandle,
2255 };
1da177e4
LT		 2256 struct nfs4_server_caps_res res = {};
2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2259 .rpc_argp = &args,
1da177e4
LT		 2260 .rpc_resp = &res,
2261 };
2262 int status;
2263
7c513058 2264 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2265 if (status == 0) {
2266 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2267 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2268 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2269 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2270 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2271 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2272 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2273 server->caps |= NFS_CAP_ACLS;
2274 if (res.has_links != 0)
2275 server->caps |= NFS_CAP_HARDLINKS;
2276 if (res.has_symlinks != 0)
2277 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2278 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2279 server->caps |= NFS_CAP_FILEID;
2280 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2281 server->caps |= NFS_CAP_MODE;
2282 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2283 server->caps |= NFS_CAP_NLINK;
2284 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2285 server->caps |= NFS_CAP_OWNER;
2286 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2287 server->caps |= NFS_CAP_OWNER_GROUP;
2288 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2289 server->caps |= NFS_CAP_ATIME;
2290 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2291 server->caps |= NFS_CAP_CTIME;
2292 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2293 server->caps |= NFS_CAP_MTIME;
2294
a65318bf
TM		 2295 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2296 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2297 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2298 server->acl_bitmask = res.acl_bitmask;
264e6351 2299 server->fh_expire_type = res.fh_expire_type;
1da177e4 2300 }
cccef3b9 2301
1da177e4
LT		 2302 return status;
2303}
2304
55a97593 2305int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2306{
2307 struct nfs4_exception exception = { };
2308 int err;
2309 do {
2310 err = nfs4_handle_exception(server,
2311 _nfs4_server_capabilities(server, fhandle),
2312 &exception);
2313 } while (exception.retry);
2314 return err;
2315}
2316
2317static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2318 struct nfs_fsinfo *info)
2319{
1da177e4
LT		 2320 struct nfs4_lookup_root_arg args = {
2321 .bitmask = nfs4_fattr_bitmap,
2322 };
2323 struct nfs4_lookup_res res = {
2324 .server = server,
0e574af1 2325 .fattr = info->fattr,
1da177e4
LT		 2326 .fh = fhandle,
2327 };
2328 struct rpc_message msg = {
2329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2330 .rpc_argp = &args,
2331 .rpc_resp = &res,
2332 };
008f55d0 2333
0e574af1 2334 nfs_fattr_init(info->fattr);
7c513058 2335 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2336}
2337
2338static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2339 struct nfs_fsinfo *info)
2340{
2341 struct nfs4_exception exception = { };
2342 int err;
2343 do {
fb8a5ba8
BS		 2344 err = _nfs4_lookup_root(server, fhandle, info);
2345 switch (err) {
2346 case 0:
2347 case -NFS4ERR_WRONGSEC:
05e9cfb4 2348 goto out;
fb8a5ba8
BS		 2349 default:
2350 err = nfs4_handle_exception(server, err, &exception);
2351 }
1da177e4 2352 } while (exception.retry);
05e9cfb4 2353out:
1da177e4
LT		 2354 return err;
2355}
2356
8f70e95f
BS		 2357static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2358 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2359{
2360 struct rpc_auth *auth;
2361 int ret;
2362
2363 auth = rpcauth_create(flavor, server->client);
2364 if (!auth) {
2365 ret = -EIO;
2366 goto out;
2367 }
2368 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2369out:
2370 return ret;
2371}
2372
801a16dc 2373static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2374 struct nfs_fsinfo *info)
1da177e4 2375{
8f70e95f 2376 int i, len, status = 0;
0fabee24 2377 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2378
801a16dc
BS		 2379 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2380 flav_array[len] = RPC_AUTH_NULL;
2381 len += 1;
8f70e95f
BS		 2382
2383 for (i = 0; i < len; i++) {
2384 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2385 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2386 continue;
2387 break;
8f70e95f 2388 }
fb8a5ba8
BS		 2389 /*
2390 * -EACCESS could mean that the user doesn't have correct permissions
2391 * to access the mount. It could also mean that we tried to mount
2392 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2393 * existing mount programs don't handle -EACCES very well so it should
2394 * be mapped to -EPERM instead.
2395 */
2396 if (status == -EACCES)
2397 status = -EPERM;
801a16dc
BS		 2398 return status;
2399}
2400
2401/*
2402 * get the file handle for the "/" directory on the server
2403 */
3028eb2b
BS		 2404int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2405 struct nfs_fsinfo *info)
801a16dc 2406{
fca78d6d 2407 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2408 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2409 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2410 /*
2411 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2412 * by nfs4_map_errors() as this function exits.
2413 */
fca78d6d 2414 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2415 if (status == 0)
2416 status = nfs4_server_capabilities(server, fhandle);
2417 if (status == 0)
2418 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2419 return nfs4_map_errors(status);
1da177e4
LT		 2420}
2421
bae36241
BS		 2422static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2423 struct nfs_fsinfo *info)
2424{
2425 int error;
2426 struct nfs_fattr *fattr = info->fattr;
2427
2428 error = nfs4_server_capabilities(server, mntfh);
2429 if (error < 0) {
2430 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2431 return error;
2432 }
2433
2434 error = nfs4_proc_getattr(server, mntfh, fattr);
2435 if (error < 0) {
2436 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2437 return error;
2438 }
2439
2440 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2441 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2442 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2443
2444 return error;
2445}
2446
6b97fd3d
MN		 2447/*
2448 * Get locations and (maybe) other attributes of a referral.
2449 * Note that we'll actually follow the referral later when
2450 * we detect fsid mismatch in inode revalidation
2451 */
f05d147f
BS		 2452static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2453 const struct qstr *name, struct nfs_fattr *fattr,
2454 struct nfs_fh *fhandle)
6b97fd3d
MN		 2455{
2456 int status = -ENOMEM;
2457 struct page *page = NULL;
2458 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2459
2460 page = alloc_page(GFP_KERNEL);
2461 if (page == NULL)
2462 goto out;
2463 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2464 if (locations == NULL)
2465 goto out;
2466
f05d147f 2467 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2468 if (status != 0)
2469 goto out;
2470 /* Make sure server returned a different fsid for the referral */
2471 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2472 dprintk("%s: server did not return a different fsid for"
2473 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2474 status = -EIO;
2475 goto out;
2476 }
533eb461
AA		 2477 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2478 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2479
533eb461 2480 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2481 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2482 memset(fhandle, 0, sizeof(struct nfs_fh));
2483out:
2484 if (page)
2485 __free_page(page);
5d7ca35a 2486 kfree(locations);
6b97fd3d
MN		 2487 return status;
2488}
2489
1da177e4
LT		 2490static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2491{
2492 struct nfs4_getattr_arg args = {
2493 .fh = fhandle,
2494 .bitmask = server->attr_bitmask,
2495 };
2496 struct nfs4_getattr_res res = {
2497 .fattr = fattr,
2498 .server = server,
2499 };
2500 struct rpc_message msg = {
2501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2502 .rpc_argp = &args,
2503 .rpc_resp = &res,
2504 };
2505
0e574af1 2506 nfs_fattr_init(fattr);
7c513058 2507 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2508}
2509
2510static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2511{
2512 struct nfs4_exception exception = { };
2513 int err;
2514 do {
2515 err = nfs4_handle_exception(server,
2516 _nfs4_proc_getattr(server, fhandle, fattr),
2517 &exception);
2518 } while (exception.retry);
2519 return err;
2520}
2521
2522/*
2523 * The file is not closed if it is opened due to the a request to change
2524 * the size of the file. The open call will not be needed once the
2525 * VFS layer lookup-intents are implemented.
2526 *
2527 * Close is called when the inode is destroyed.
2528 * If we haven't opened the file for O_WRONLY, we
2529 * need to in the size_change case to obtain a stateid.
2530 *
2531 * Got race?
2532 * Because OPEN is always done by name in nfsv4, it is
2533 * possible that we opened a different file by the same
2534 * name. We can recognize this race condition, but we
2535 * can't do anything about it besides returning an error.
2536 *
2537 * This will be fixed with VFS changes (lookup-intent).
2538 */
2539static int
2540nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2541 struct iattr *sattr)
2542{
08e9eac4 2543 struct inode *inode = dentry->d_inode;
659bfcd6 2544 struct rpc_cred *cred = NULL;
d530838b 2545 struct nfs4_state *state = NULL;
1da177e4
LT		 2546 int status;
2547
8a1636c4
BH		 2548 if (pnfs_ld_layoutret_on_setattr(inode))
2549 pnfs_return_layout(inode);
2550
0e574af1 2551 nfs_fattr_init(fattr);
1da177e4 2552
2669940d
AA		 2553 /* Deal with open(O_TRUNC) */
2554 if (sattr->ia_valid & ATTR_OPEN)
2555 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2556
2557 /* Optimization: if the end result is no change, don't RPC */
2558 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2559 return 0;
2560
d530838b 2561 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2562 if (sattr->ia_valid & ATTR_FILE) {
2563 struct nfs_open_context *ctx;
2564
2565 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2566 if (ctx) {
2567 cred = ctx->cred;
2568 state = ctx->state;
2569 }
659bfcd6 2570 }
08e9eac4 2571
659bfcd6 2572 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2573 if (status == 0)
2574 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2575 return status;
2576}
2577
0c2e53f1
TM		 2578static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2579 const struct qstr *name, struct nfs_fh *fhandle,
2580 struct nfs_fattr *fattr)
2b3de441 2581{
0c2e53f1 2582 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2583 int status;
2584 struct nfs4_lookup_arg args = {
2585 .bitmask = server->attr_bitmask,
0c2e53f1 2586 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2587 .name = name,
2588 };
2589 struct nfs4_lookup_res res = {
2590 .server = server,
2591 .fattr = fattr,
2592 .fh = fhandle,
2593 };
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2596 .rpc_argp = &args,
2597 .rpc_resp = &res,
2598 };
2599
2600 nfs_fattr_init(fattr);
2601
1da177e4 2602 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2603 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2604 dprintk("NFS reply lookup: %d\n", status);
2605 return status;
2606}
2607
72de53ec 2608static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2609{
7ebb9315 2610 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2611 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2612 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2613 fattr->nlink = 2;
2614}
2615
72de53ec
BS		 2616static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2617 struct qstr *name, struct nfs_fh *fhandle,
2618 struct nfs_fattr *fattr)
1da177e4
LT		 2619{
2620 struct nfs4_exception exception = { };
72de53ec 2621 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2622 int err;
2623 do {
72de53ec
BS		 2624 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2625 switch (err) {
08ef7bd3 2626 case -NFS4ERR_BADNAME:
72de53ec
BS		 2627 err = -ENOENT;
2628 goto out;
0c2e53f1 2629 case -NFS4ERR_MOVED:
f05d147f 2630 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2631 goto out;
0c2e53f1 2632 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2633 err = -EPERM;
2634 if (client != *clnt)
2635 goto out;
2636
2637 client = nfs4_create_sec_client(client, dir, name);
2638 if (IS_ERR(client))
2639 return PTR_ERR(client);
2640
2641 exception.retry = 1;
2642 break;
2643 default:
2644 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2645 }
1da177e4 2646 } while (exception.retry);
72de53ec
BS		 2647
2648out:
2649 if (err == 0)
2650 *clnt = client;
2651 else if (client != *clnt)
2652 rpc_shutdown_client(client);
2653
1da177e4
LT		 2654 return err;
2655}
2656
80a16b21 2657static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2658 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2659{
2660 int status;
2661 struct rpc_clnt *client = NFS_CLIENT(dir);
2662
2663 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2664 if (client != NFS_CLIENT(dir)) {
2665 rpc_shutdown_client(client);
2666 nfs_fixup_secinfo_attributes(fattr);
2667 }
2668 return status;
2669}
2670
f05d147f
BS		 2671struct rpc_clnt *
2672nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2673 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2674{
2675 int status;
2676 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2677
2678 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2679 if (status < 0) {
2680 rpc_shutdown_client(client);
2681 return ERR_PTR(status);
2682 }
2683 return client;
2684}
2685
1da177e4
LT		 2686static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2687{
76b32999 2688 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2689 struct nfs4_accessargs args = {
2690 .fh = NFS_FH(inode),
a4980e78 2691 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2692 };
2693 struct nfs4_accessres res = {
2694 .server = server,
1da177e4 2695 };
1da177e4
LT		 2696 struct rpc_message msg = {
2697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2698 .rpc_argp = &args,
2699 .rpc_resp = &res,
2700 .rpc_cred = entry->cred,
2701 };
2702 int mode = entry->mask;
2703 int status;
2704
2705 /*
2706 * Determine which access bits we want to ask for...
2707 */
2708 if (mode & MAY_READ)
2709 args.access |= NFS4_ACCESS_READ;
2710 if (S_ISDIR(inode->i_mode)) {
2711 if (mode & MAY_WRITE)
2712 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2713 if (mode & MAY_EXEC)
2714 args.access |= NFS4_ACCESS_LOOKUP;
2715 } else {
2716 if (mode & MAY_WRITE)
2717 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2718 if (mode & MAY_EXEC)
2719 args.access |= NFS4_ACCESS_EXECUTE;
2720 }
c407d41a
TM		 2721
2722 res.fattr = nfs_alloc_fattr();
2723 if (res.fattr == NULL)
2724 return -ENOMEM;
2725
7c513058 2726 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2727 if (!status) {
2728 entry->mask = 0;
2729 if (res.access & NFS4_ACCESS_READ)
2730 entry->mask |= MAY_READ;
2731 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2732 entry->mask |= MAY_WRITE;
2733 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2734 entry->mask |= MAY_EXEC;
c407d41a 2735 nfs_refresh_inode(inode, res.fattr);
1da177e4 2736 }
c407d41a 2737 nfs_free_fattr(res.fattr);
1da177e4
LT		 2738 return status;
2739}
2740
2741static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2742{
2743 struct nfs4_exception exception = { };
2744 int err;
2745 do {
2746 err = nfs4_handle_exception(NFS_SERVER(inode),
2747 _nfs4_proc_access(inode, entry),
2748 &exception);
2749 } while (exception.retry);
2750 return err;
2751}
2752
2753/*
2754 * TODO: For the time being, we don't try to get any attributes
2755 * along with any of the zero-copy operations READ, READDIR,
2756 * READLINK, WRITE.
2757 *
2758 * In the case of the first three, we want to put the GETATTR
2759 * after the read-type operation -- this is because it is hard
2760 * to predict the length of a GETATTR response in v4, and thus
2761 * align the READ data correctly. This means that the GETATTR
2762 * may end up partially falling into the page cache, and we should
2763 * shift it into the 'tail' of the xdr_buf before processing.
2764 * To do this efficiently, we need to know the total length
2765 * of data received, which doesn't seem to be available outside
2766 * of the RPC layer.
2767 *
2768 * In the case of WRITE, we also want to put the GETATTR after
2769 * the operation -- in this case because we want to make sure
140150db 2770 * we get the post-operation mtime and size.
1da177e4
LT		 2771 *
2772 * Both of these changes to the XDR layer would in fact be quite
2773 * minor, but I decided to leave them for a subsequent patch.
2774 */
2775static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2776 unsigned int pgbase, unsigned int pglen)
2777{
2778 struct nfs4_readlink args = {
2779 .fh = NFS_FH(inode),
2780 .pgbase = pgbase,
2781 .pglen = pglen,
2782 .pages = &page,
2783 };
f50c7000 2784 struct nfs4_readlink_res res;
1da177e4
LT		 2785 struct rpc_message msg = {
2786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2787 .rpc_argp = &args,
f50c7000 2788 .rpc_resp = &res,
1da177e4
LT		 2789 };
2790
7c513058 2791 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2792}
2793
2794static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2795 unsigned int pgbase, unsigned int pglen)
2796{
2797 struct nfs4_exception exception = { };
2798 int err;
2799 do {
2800 err = nfs4_handle_exception(NFS_SERVER(inode),
2801 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2802 &exception);
2803 } while (exception.retry);
2804 return err;
2805}
2806
1da177e4 2807/*
8867fe58 2808 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2809 */
1da177e4
LT		 2810static int
2811nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2812 int flags)
1da177e4 2813{
8867fe58 2814 struct nfs_open_context *ctx;
1da177e4 2815 struct nfs4_state *state;
1da177e4
LT		 2816 int status = 0;
2817
8867fe58
MS		 2818 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2819 if (IS_ERR(ctx))
2820 return PTR_ERR(ctx);
2821
a8a5da99 2822 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2823 state = nfs4_do_open(dir, dentry, ctx->mode,
2824 flags, sattr, ctx->cred,
2825 &ctx->mdsthreshold);
d4d9cdcb 2826 d_drop(dentry);
1da177e4
LT		 2827 if (IS_ERR(state)) {
2828 status = PTR_ERR(state);
c0204fd2 2829 goto out;
1da177e4 2830 }
d4d9cdcb 2831 d_add(dentry, igrab(state->inode));
d75340cc 2832 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2833 ctx->state = state;
1da177e4 2834out:
8867fe58 2835 put_nfs_open_context(ctx);
1da177e4
LT		 2836 return status;
2837}
2838
2839static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2840{
16e42959 2841 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2842 struct nfs_removeargs args = {
1da177e4 2843 .fh = NFS_FH(dir),
26fe5750 2844 .name = *name,
16e42959 2845 };
4fdc17b2 2846 struct nfs_removeres res = {
16e42959 2847 .server = server,
1da177e4 2848 };
1da177e4 2849 struct rpc_message msg = {
4fdc17b2
TM		 2850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2851 .rpc_argp = &args,
2852 .rpc_resp = &res,
1da177e4 2853 };
778d2817 2854 int status;
1da177e4 2855
7c513058 2856 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2857 if (status == 0)
16e42959 2858 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2859 return status;
2860}
2861
2862static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2863{
2864 struct nfs4_exception exception = { };
2865 int err;
2866 do {
2867 err = nfs4_handle_exception(NFS_SERVER(dir),
2868 _nfs4_proc_remove(dir, name),
2869 &exception);
2870 } while (exception.retry);
2871 return err;
2872}
2873
e4eff1a6 2874static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2875{
e4eff1a6
TM		 2876 struct nfs_server *server = NFS_SERVER(dir);
2877 struct nfs_removeargs *args = msg->rpc_argp;
2878 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2879
e4eff1a6 2880 res->server = server;
1da177e4 2881 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2882 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2883}
2884
34e137cc
BS		 2885static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2886{
2887 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2888 &data->args.seq_args,
2889 &data->res.seq_res,
2890 task))
2891 return;
2892 rpc_call_start(task);
1da177e4
LT		 2893}
2894
e4eff1a6 2895static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2896{
e4eff1a6
TM		 2897 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2898
14516c3a
TM		 2899 if (!nfs4_sequence_done(task, &res->seq_res))
2900 return 0;
9e33bed5 2901 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2902 return 0;
2903 update_changeattr(dir, &res->cinfo);
e4eff1a6 2904 return 1;
1da177e4
LT		 2905}
2906
d3d4152a
JL		 2907static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2908{
2909 struct nfs_server *server = NFS_SERVER(dir);
2910 struct nfs_renameargs *arg = msg->rpc_argp;
2911 struct nfs_renameres *res = msg->rpc_resp;
2912
2913 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2914 res->server = server;
9d12b216 2915 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2916}
2917
c6bfa1a1
BS		 2918static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2919{
2920 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2921 &data->args.seq_args,
2922 &data->res.seq_res,
2923 task))
2924 return;
2925 rpc_call_start(task);
d3d4152a
JL		 2926}
2927
2928static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2929 struct inode *new_dir)
2930{
2931 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2932
2933 if (!nfs4_sequence_done(task, &res->seq_res))
2934 return 0;
2935 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2936 return 0;
2937
2938 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2939 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2940 return 1;
2941}
2942
1da177e4
LT		 2943static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2944 struct inode *new_dir, struct qstr *new_name)
2945{
6caf2c82 2946 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2947 struct nfs_renameargs arg = {
1da177e4
LT		 2948 .old_dir = NFS_FH(old_dir),
2949 .new_dir = NFS_FH(new_dir),
2950 .old_name = old_name,
2951 .new_name = new_name,
6caf2c82 2952 };
e8582a8b 2953 struct nfs_renameres res = {
6caf2c82 2954 .server = server,
1da177e4 2955 };
1da177e4
LT		 2956 struct rpc_message msg = {
2957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2958 .rpc_argp = &arg,
2959 .rpc_resp = &res,
2960 };
011fff72 2961 int status = -ENOMEM;
1da177e4 2962
7c513058 2963 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2964 if (!status) {
2965 update_changeattr(old_dir, &res.old_cinfo);
2966 update_changeattr(new_dir, &res.new_cinfo);
2967 }
2968 return status;
2969}
2970
2971static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2972 struct inode *new_dir, struct qstr *new_name)
2973{
2974 struct nfs4_exception exception = { };
2975 int err;
2976 do {
2977 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2978 _nfs4_proc_rename(old_dir, old_name,
2979 new_dir, new_name),
2980 &exception);
2981 } while (exception.retry);
2982 return err;
2983}
2984
2985static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2986{
91ba2eee 2987 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2988 struct nfs4_link_arg arg = {
2989 .fh = NFS_FH(inode),
2990 .dir_fh = NFS_FH(dir),
2991 .name = name,
91ba2eee
TM		 2992 .bitmask = server->attr_bitmask,
2993 };
91ba2eee
TM		 2994 struct nfs4_link_res res = {
2995 .server = server,
1da177e4 2996 };
1da177e4
LT		 2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2999 .rpc_argp = &arg,
91ba2eee 3000 .rpc_resp = &res,
1da177e4 3001 };
136f2627
TM		 3002 int status = -ENOMEM;
3003
3004 res.fattr = nfs_alloc_fattr();
778d2817 3005 if (res.fattr == NULL)
136f2627 3006 goto out;
1da177e4 3007
7c513058 3008 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3009 if (!status) {
3010 update_changeattr(dir, &res.cinfo);
73a3d07c 3011 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3012 }
136f2627 3013out:
136f2627 3014 nfs_free_fattr(res.fattr);
1da177e4
LT		 3015 return status;
3016}
3017
3018static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022 do {
3023 err = nfs4_handle_exception(NFS_SERVER(inode),
3024 _nfs4_proc_link(inode, dir, name),
3025 &exception);
3026 } while (exception.retry);
3027 return err;
3028}
3029
57dc9a57
TM		 3030struct nfs4_createdata {
3031 struct rpc_message msg;
3032 struct nfs4_create_arg arg;
3033 struct nfs4_create_res res;
3034 struct nfs_fh fh;
3035 struct nfs_fattr fattr;
57dc9a57
TM		 3036};
3037
3038static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3039 struct qstr *name, struct iattr *sattr, u32 ftype)
3040{
3041 struct nfs4_createdata *data;
3042
3043 data = kzalloc(sizeof(*data), GFP_KERNEL);
3044 if (data != NULL) {
3045 struct nfs_server *server = NFS_SERVER(dir);
3046
3047 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3048 data->msg.rpc_argp = &data->arg;
3049 data->msg.rpc_resp = &data->res;
3050 data->arg.dir_fh = NFS_FH(dir);
3051 data->arg.server = server;
3052 data->arg.name = name;
3053 data->arg.attrs = sattr;
3054 data->arg.ftype = ftype;
3055 data->arg.bitmask = server->attr_bitmask;
3056 data->res.server = server;
3057 data->res.fh = &data->fh;
3058 data->res.fattr = &data->fattr;
57dc9a57 3059 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3060 }
3061 return data;
3062}
3063
3064static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3065{
7c513058 3066 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3067 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3068 if (status == 0) {
3069 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3070 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3071 }
3072 return status;
3073}
3074
3075static void nfs4_free_createdata(struct nfs4_createdata *data)
3076{
3077 kfree(data);
3078}
3079
4f390c15 3080static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3081 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3082{
57dc9a57
TM		 3083 struct nfs4_createdata *data;
3084 int status = -ENAMETOOLONG;
1da177e4 3085
94a6d753 3086 if (len > NFS4_MAXPATHLEN)
57dc9a57 3087 goto out;
4f390c15 3088
57dc9a57
TM		 3089 status = -ENOMEM;
3090 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3091 if (data == NULL)
3092 goto out;
3093
3094 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3095 data->arg.u.symlink.pages = &page;
3096 data->arg.u.symlink.len = len;
1da177e4 3097
57dc9a57
TM		 3098 status = nfs4_do_create(dir, dentry, data);
3099
3100 nfs4_free_createdata(data);
3101out:
1da177e4
LT		 3102 return status;
3103}
3104
4f390c15 3105static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3106 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3107{
3108 struct nfs4_exception exception = { };
3109 int err;
3110 do {
3111 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3112 _nfs4_proc_symlink(dir, dentry, page,
3113 len, sattr),
1da177e4
LT		 3114 &exception);
3115 } while (exception.retry);
3116 return err;
3117}
3118
3119static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3120 struct iattr *sattr)
3121{
57dc9a57
TM		 3122 struct nfs4_createdata *data;
3123 int status = -ENOMEM;
1da177e4 3124
57dc9a57
TM		 3125 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3126 if (data == NULL)
3127 goto out;
3128
3129 status = nfs4_do_create(dir, dentry, data);
3130
3131 nfs4_free_createdata(data);
3132out:
1da177e4
LT		 3133 return status;
3134}
3135
3136static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3137 struct iattr *sattr)
3138{
3139 struct nfs4_exception exception = { };
3140 int err;
a8a5da99
AK		 3141
3142 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3143 do {
3144 err = nfs4_handle_exception(NFS_SERVER(dir),
3145 _nfs4_proc_mkdir(dir, dentry, sattr),
3146 &exception);
3147 } while (exception.retry);
3148 return err;
3149}
3150
3151static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3152 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3153{
3154 struct inode *dir = dentry->d_inode;
3155 struct nfs4_readdir_arg args = {
3156 .fh = NFS_FH(dir),
56e4ebf8 3157 .pages = pages,
1da177e4
LT		 3158 .pgbase = 0,
3159 .count = count,
96d25e53 3160 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3161 .plus = plus,
1da177e4
LT		 3162 };
3163 struct nfs4_readdir_res res;
3164 struct rpc_message msg = {
3165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3166 .rpc_argp = &args,
3167 .rpc_resp = &res,
3168 .rpc_cred = cred,
3169 };
3170 int status;
3171
3110ff80 3172 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3173 dentry->d_parent->d_name.name,
3174 dentry->d_name.name,
3175 (unsigned long long)cookie);
1da177e4
LT		 3176 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3177 res.pgbase = args.pgbase;
7c513058 3178 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3179 if (status >= 0) {
1da177e4 3180 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3181 status += args.pgbase;
3182 }
c4812998
TM		 3183
3184 nfs_invalidate_atime(dir);
3185
3110ff80 3186 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3187 return status;
3188}
3189
3190static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3191 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3192{
3193 struct nfs4_exception exception = { };
3194 int err;
3195 do {
3196 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3197 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3198 pages, count, plus),
1da177e4
LT		 3199 &exception);
3200 } while (exception.retry);
3201 return err;
3202}
3203
3204static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3205 struct iattr *sattr, dev_t rdev)
3206{
57dc9a57
TM		 3207 struct nfs4_createdata *data;
3208 int mode = sattr->ia_mode;
3209 int status = -ENOMEM;
1da177e4
LT		 3210
3211 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3212 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3213
3214 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3215 if (data == NULL)
3216 goto out;
3217
1da177e4 3218 if (S_ISFIFO(mode))
57dc9a57 3219 data->arg.ftype = NF4FIFO;
1da177e4 3220 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3221 data->arg.ftype = NF4BLK;
3222 data->arg.u.device.specdata1 = MAJOR(rdev);
3223 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3224 }
3225 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3226 data->arg.ftype = NF4CHR;
3227 data->arg.u.device.specdata1 = MAJOR(rdev);
3228 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3229 }
1da177e4 3230
57dc9a57
TM		 3231 status = nfs4_do_create(dir, dentry, data);
3232
3233 nfs4_free_createdata(data);
3234out:
1da177e4
LT		 3235 return status;
3236}
3237
3238static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3239 struct iattr *sattr, dev_t rdev)
3240{
3241 struct nfs4_exception exception = { };
3242 int err;
a8a5da99
AK		 3243
3244 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3245 do {
3246 err = nfs4_handle_exception(NFS_SERVER(dir),
3247 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3248 &exception);
3249 } while (exception.retry);
3250 return err;
3251}
3252
3253static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3254 struct nfs_fsstat *fsstat)
3255{
3256 struct nfs4_statfs_arg args = {
3257 .fh = fhandle,
3258 .bitmask = server->attr_bitmask,
3259 };
24ad148a
BH		 3260 struct nfs4_statfs_res res = {
3261 .fsstat = fsstat,
3262 };
1da177e4
LT		 3263 struct rpc_message msg = {
3264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3265 .rpc_argp = &args,
24ad148a 3266 .rpc_resp = &res,
1da177e4
LT		 3267 };
3268
0e574af1 3269 nfs_fattr_init(fsstat->fattr);
7c513058 3270 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3271}
3272
3273static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3274{
3275 struct nfs4_exception exception = { };
3276 int err;
3277 do {
3278 err = nfs4_handle_exception(server,
3279 _nfs4_proc_statfs(server, fhandle, fsstat),
3280 &exception);
3281 } while (exception.retry);
3282 return err;
3283}
3284
3285static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3286 struct nfs_fsinfo *fsinfo)
3287{
3288 struct nfs4_fsinfo_arg args = {
3289 .fh = fhandle,
3290 .bitmask = server->attr_bitmask,
3291 };
3dda5e43
BH		 3292 struct nfs4_fsinfo_res res = {
3293 .fsinfo = fsinfo,
3294 };
1da177e4
LT		 3295 struct rpc_message msg = {
3296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3297 .rpc_argp = &args,
3dda5e43 3298 .rpc_resp = &res,
1da177e4
LT		 3299 };
3300
7c513058 3301 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3302}
3303
3304static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3305{
3306 struct nfs4_exception exception = { };
3307 int err;
3308
3309 do {
3310 err = nfs4_handle_exception(server,
3311 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3312 &exception);
3313 } while (exception.retry);
3314 return err;
3315}
3316
3317static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3318{
e38eb650
BS		 3319 int error;
3320
0e574af1 3321 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3322 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3323 if (error == 0)
3324 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3325
3326 return error;
1da177e4
LT		 3327}
3328
3329static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3330 struct nfs_pathconf *pathconf)
3331{
3332 struct nfs4_pathconf_arg args = {
3333 .fh = fhandle,
3334 .bitmask = server->attr_bitmask,
3335 };
d45b2989
BH		 3336 struct nfs4_pathconf_res res = {
3337 .pathconf = pathconf,
3338 };
1da177e4
LT		 3339 struct rpc_message msg = {
3340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3341 .rpc_argp = &args,
d45b2989 3342 .rpc_resp = &res,
1da177e4
LT		 3343 };
3344
3345 /* None of the pathconf attributes are mandatory to implement */
3346 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3347 memset(pathconf, 0, sizeof(*pathconf));
3348 return 0;
3349 }
3350
0e574af1 3351 nfs_fattr_init(pathconf->fattr);
7c513058 3352 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3353}
3354
3355static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3356 struct nfs_pathconf *pathconf)
3357{
3358 struct nfs4_exception exception = { };
3359 int err;
3360
3361 do {
3362 err = nfs4_handle_exception(server,
3363 _nfs4_proc_pathconf(server, fhandle, pathconf),
3364 &exception);
3365 } while (exception.retry);
3366 return err;
3367}
3368
d20581aa
BH		 3369void __nfs4_read_done_cb(struct nfs_read_data *data)
3370{
cd841605 3371 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3372}
3373
cbdabc7f 3374static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3375{
cd841605 3376 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3377
9e33bed5 3378 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3379 rpc_restart_call_prepare(task);
ec06c096 3380 return -EAGAIN;
1da177e4 3381 }
8850df99 3382
d20581aa 3383 __nfs4_read_done_cb(data);
1da177e4 3384 if (task->tk_status > 0)
ec06c096
TM		 3385 renew_lease(server, data->timestamp);
3386 return 0;
1da177e4
LT		 3387}
3388
cbdabc7f
AA		 3389static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3390{
3391
3392 dprintk("--> %s\n", __func__);
3393
3394 if (!nfs4_sequence_done(task, &data->res.seq_res))
3395 return -EAGAIN;
3396
d20581aa
BH		 3397 return data->read_done_cb ? data->read_done_cb(task, data) :
3398 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3399}
3400
bdc7f021 3401static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3402{
1da177e4 3403 data->timestamp = jiffies;
cbdabc7f 3404 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3405 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3406 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3407}
3408
ea7c3303
BS		 3409static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3410{
cd841605 3411 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3412 &data->args.seq_args,
3413 &data->res.seq_res,
3414 task))
3415 return;
3416 rpc_call_start(task);
1da177e4
LT		 3417}
3418
b029bc9b 3419static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3420{
cd841605 3421 struct inode *inode = data->header->inode;
1da177e4 3422
9e33bed5 3423 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3424 rpc_restart_call_prepare(task);
788e7a89 3425 return -EAGAIN;
1da177e4 3426 }
4f9838c7 3427 if (task->tk_status >= 0) {
1da177e4 3428 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3429 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3430 }
788e7a89 3431 return 0;
1da177e4
LT		 3432}
3433
b029bc9b
FI		 3434static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3435{
3436 if (!nfs4_sequence_done(task, &data->res.seq_res))
3437 return -EAGAIN;
d20581aa
BH		 3438 return data->write_done_cb ? data->write_done_cb(task, data) :
3439 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3440}
3441
5a37f851
TM		 3442static
3443bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3444{
5a37f851
TM		 3445 const struct nfs_pgio_header *hdr = data->header;
3446
3447 /* Don't request attributes for pNFS or O_DIRECT writes */
3448 if (data->ds_clp != NULL || hdr->dreq != NULL)
3449 return false;
3450 /* Otherwise, request attributes if and only if we don't hold
3451 * a delegation
3452 */
011e2a7f 3453 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3454}
a69aef14 3455
bdc7f021 3456static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3457{
cd841605 3458 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3459
5a37f851 3460 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3461 data->args.bitmask = NULL;
3462 data->res.fattr = NULL;
3463 } else
3464 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3465
b029bc9b
FI		 3466 if (!data->write_done_cb)
3467 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3468 data->res.server = server;
1da177e4
LT		 3469 data->timestamp = jiffies;
3470
bdc7f021 3471 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3472 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3473}
3474
c6cb80d0
BS		 3475static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3476{
cd841605 3477 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3478 &data->args.seq_args,
3479 &data->res.seq_res,
3480 task))
3481 return;
3482 rpc_call_start(task);
1da177e4
LT		 3483}
3484
0b7c0153 3485static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3486{
3487 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3488 &data->args.seq_args,
3489 &data->res.seq_res,
3490 task))
3491 return;
3492 rpc_call_start(task);
1da177e4
LT		 3493}
3494
0b7c0153 3495static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3496{
1da177e4 3497 struct inode *inode = data->inode;
14516c3a 3498
9e33bed5 3499 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3500 rpc_restart_call_prepare(task);
788e7a89 3501 return -EAGAIN;
1da177e4 3502 }
788e7a89 3503 return 0;
1da177e4
LT		 3504}
3505
0b7c0153 3506static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3507{
3508 if (!nfs4_sequence_done(task, &data->res.seq_res))
3509 return -EAGAIN;
0b7c0153 3510 return data->commit_done_cb(task, data);
5f452431
FI		 3511}
3512
0b7c0153 3513static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3514{
788e7a89 3515 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3516
0b7c0153
FI		 3517 if (data->commit_done_cb == NULL)
3518 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3519 data->res.server = server;
bdc7f021 3520 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3521 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3522}
3523
9bc4e3ca
CL		 3524struct nfs4_renewdata {
3525 struct nfs_client *client;
3526 unsigned long timestamp;
3527};
3528
1da177e4
LT		 3529/*
3530 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3531 * standalone procedure for queueing an asynchronous RENEW.
3532 */
9bc4e3ca 3533static void nfs4_renew_release(void *calldata)
dc96aef9 3534{
9bc4e3ca
CL		 3535 struct nfs4_renewdata *data = calldata;
3536 struct nfs_client *clp = data->client;
dc96aef9 3537
0851de06
AB		 3538 if (atomic_read(&clp->cl_count) > 1)
3539 nfs4_schedule_state_renewal(clp);
3540 nfs_put_client(clp);
9bc4e3ca 3541 kfree(data);
dc96aef9
AB		 3542}
3543
9bc4e3ca 3544static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3545{
9bc4e3ca
CL		 3546 struct nfs4_renewdata *data = calldata;
3547 struct nfs_client *clp = data->client;
3548 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3549
3550 if (task->tk_status < 0) {
95baa25c 3551 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3552 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3553 return;
3554 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3555 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3556 return;
3557 }
3558 nfs4_schedule_path_down_recovery(clp);
1da177e4 3559 }
452e9352 3560 do_renew_lease(clp, timestamp);
1da177e4
LT		 3561}
3562
963d8fe5
TM		 3563static const struct rpc_call_ops nfs4_renew_ops = {
3564 .rpc_call_done = nfs4_renew_done,
dc96aef9 3565 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3566};
3567
2f60ea6b 3568static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3569{
3570 struct rpc_message msg = {
3571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3572 .rpc_argp = clp,
b4454fe1 3573 .rpc_cred = cred,
1da177e4 3574 };
9bc4e3ca 3575 struct nfs4_renewdata *data;
1da177e4 3576
2f60ea6b
TM		 3577 if (renew_flags == 0)
3578 return 0;
0851de06
AB		 3579 if (!atomic_inc_not_zero(&clp->cl_count))
3580 return -EIO;
b569ad34 3581 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3582 if (data == NULL)
3583 return -ENOMEM;
3584 data->client = clp;
3585 data->timestamp = jiffies;
1da177e4 3586 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3587 &nfs4_renew_ops, data);
1da177e4
LT		 3588}
3589
8534d4ec 3590static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3591{
3592 struct rpc_message msg = {
3593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3594 .rpc_argp = clp,
b4454fe1 3595 .rpc_cred = cred,
1da177e4
LT		 3596 };
3597 unsigned long now = jiffies;
3598 int status;
3599
3600 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3601 if (status < 0)
3602 return status;
452e9352 3603 do_renew_lease(clp, now);
1da177e4
LT		 3604 return 0;
3605}
3606
aa1870af
BF		 3607static inline int nfs4_server_supports_acls(struct nfs_server *server)
3608{
3609 return (server->caps & NFS_CAP_ACLS)
3610 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3611 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3612}
3613
3614/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3615 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3616 * the stack.
3617 */
3618#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3619
e9e3d724
NH		 3620static int buf_to_pages_noslab(const void *buf, size_t buflen,
3621 struct page **pages, unsigned int *pgbase)
3622{
3623 struct page *newpage, **spages;
3624 int rc = 0;
3625 size_t len;
3626 spages = pages;
3627
3628 do {
43b7c3f0 3629 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3630 newpage = alloc_page(GFP_KERNEL);
3631
3632 if (newpage == NULL)
3633 goto unwind;
3634 memcpy(page_address(newpage), buf, len);
3635 buf += len;
3636 buflen -= len;
3637 *pages++ = newpage;
3638 rc++;
3639 } while (buflen != 0);
3640
3641 return rc;
3642
3643unwind:
3644 for(; rc > 0; rc--)
3645 __free_page(spages[rc-1]);
3646 return -ENOMEM;
3647}
3648
e50a1c2e
BF		 3649struct nfs4_cached_acl {
3650 int cached;
3651 size_t len;
3e9d4154 3652 char data[0];
e50a1c2e
BF		 3653};
3654
3655static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3656{
3657 struct nfs_inode *nfsi = NFS_I(inode);
3658
3659 spin_lock(&inode->i_lock);
3660 kfree(nfsi->nfs4_acl);
3661 nfsi->nfs4_acl = acl;
3662 spin_unlock(&inode->i_lock);
3663}
3664
3665static void nfs4_zap_acl_attr(struct inode *inode)
3666{
3667 nfs4_set_cached_acl(inode, NULL);
3668}
3669
3670static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3671{
3672 struct nfs_inode *nfsi = NFS_I(inode);
3673 struct nfs4_cached_acl *acl;
3674 int ret = -ENOENT;
3675
3676 spin_lock(&inode->i_lock);
3677 acl = nfsi->nfs4_acl;
3678 if (acl == NULL)
3679 goto out;
3680 if (buf == NULL) /* user is just asking for length */
3681 goto out_len;
3682 if (acl->cached == 0)
3683 goto out;
3684 ret = -ERANGE; /* see getxattr(2) man page */
3685 if (acl->len > buflen)
3686 goto out;
3687 memcpy(buf, acl->data, acl->len);
3688out_len:
3689 ret = acl->len;
3690out:
3691 spin_unlock(&inode->i_lock);
3692 return ret;
3693}
3694
5794d21e 3695static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3696{
3697 struct nfs4_cached_acl *acl;
3698
5794d21e 3699 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3700 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3701 if (acl == NULL)
3702 goto out;
3703 acl->cached = 1;
5794d21e 3704 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3705 } else {
3706 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3707 if (acl == NULL)
3708 goto out;
3709 acl->cached = 0;
3710 }
3711 acl->len = acl_len;
3712out:
3713 nfs4_set_cached_acl(inode, acl);
3714}
3715
bf118a34
AA		 3716/*
3717 * The getxattr API returns the required buffer length when called with a
3718 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3719 * the required buf. On a NULL buf, we send a page of data to the server
3720 * guessing that the ACL request can be serviced by a page. If so, we cache
3721 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3722 * the cache. If not so, we throw away the page, and cache the required
3723 * length. The next getxattr call will then produce another round trip to
3724 * the server, this time with the input buf of the required size.
3725 */
16b4289c 3726static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3727{
bf118a34 3728 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3729 struct nfs_getaclargs args = {
3730 .fh = NFS_FH(inode),
3731 .acl_pages = pages,
3732 .acl_len = buflen,
3733 };
663c79b3
BH		 3734 struct nfs_getaclres res = {
3735 .acl_len = buflen,
3736 };
aa1870af
BF		 3737 struct rpc_message msg = {
3738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3739 .rpc_argp = &args,
663c79b3 3740 .rpc_resp = &res,
aa1870af 3741 };
bf118a34 3742 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3743
bf118a34
AA		 3744 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3745 /* As long as we're doing a round trip to the server anyway,
3746 * let's be prepared for a page of acl data. */
3747 if (npages == 0)
3748 npages = 1;
3749
5a006899
SP		 3750 /* Add an extra page to handle the bitmap returned */
3751 npages++;
3752
bf118a34
AA		 3753 for (i = 0; i < npages; i++) {
3754 pages[i] = alloc_page(GFP_KERNEL);
3755 if (!pages[i])
3756 goto out_free;
e50a1c2e 3757 }
5a006899
SP		 3758
3759 /* for decoding across pages */
3760 res.acl_scratch = alloc_page(GFP_KERNEL);
3761 if (!res.acl_scratch)
3762 goto out_free;
3763
bf118a34
AA		 3764 args.acl_len = npages * PAGE_SIZE;
3765 args.acl_pgbase = 0;
5a006899 3766
bf118a34
AA		 3767 /* Let decode_getfacl know not to fail if the ACL data is larger than
3768 * the page we send as a guess */
3769 if (buf == NULL)
3770 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3771
de040bec 3772 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3773 __func__, buf, buflen, npages, args.acl_len);
3774 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3775 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3776 if (ret)
3777 goto out_free;
bf118a34
AA		 3778
3779 acl_len = res.acl_len - res.acl_data_offset;
3780 if (acl_len > args.acl_len)
5794d21e 3781 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3782 else
5794d21e 3783 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3784 acl_len);
e50a1c2e
BF		 3785 if (buf) {
3786 ret = -ERANGE;
bf118a34 3787 if (acl_len > buflen)
e50a1c2e 3788 goto out_free;
bf118a34 3789 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3790 acl_len);
e50a1c2e 3791 }
bf118a34 3792 ret = acl_len;
e50a1c2e 3793out_free:
bf118a34
AA		 3794 for (i = 0; i < npages; i++)
3795 if (pages[i])
3796 __free_page(pages[i]);
331818f1
TM		 3797 if (res.acl_scratch)
3798 __free_page(res.acl_scratch);
aa1870af
BF		 3799 return ret;
3800}
3801
16b4289c
TM		 3802static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3803{
3804 struct nfs4_exception exception = { };
3805 ssize_t ret;
3806 do {
3807 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3808 if (ret >= 0)
3809 break;
3810 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3811 } while (exception.retry);
3812 return ret;
3813}
3814
e50a1c2e
BF		 3815static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3816{
3817 struct nfs_server *server = NFS_SERVER(inode);
3818 int ret;
3819
3820 if (!nfs4_server_supports_acls(server))
3821 return -EOPNOTSUPP;
3822 ret = nfs_revalidate_inode(server, inode);
3823 if (ret < 0)
3824 return ret;
08a22b39
AK		 3825 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3826 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3827 ret = nfs4_read_cached_acl(inode, buf, buflen);
3828 if (ret != -ENOENT)
bf118a34
AA		 3829 /* -ENOENT is returned if there is no ACL or if there is an ACL
3830 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3831 return ret;
3832 return nfs4_get_acl_uncached(inode, buf, buflen);
3833}
3834
16b4289c 3835static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3836{
3837 struct nfs_server *server = NFS_SERVER(inode);
3838 struct page *pages[NFS4ACL_MAXPAGES];
3839 struct nfs_setaclargs arg = {
3840 .fh = NFS_FH(inode),
3841 .acl_pages = pages,
3842 .acl_len = buflen,
3843 };
73c403a9 3844 struct nfs_setaclres res;
4b580ee3
BF		 3845 struct rpc_message msg = {
3846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3847 .rpc_argp = &arg,
73c403a9 3848 .rpc_resp = &res,
4b580ee3 3849 };
e9e3d724 3850 int ret, i;
4b580ee3
BF		 3851
3852 if (!nfs4_server_supports_acls(server))
3853 return -EOPNOTSUPP;
e9e3d724
NH		 3854 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3855 if (i < 0)
3856 return i;
57ec14c5 3857 nfs4_inode_return_delegation(inode);
7c513058 3858 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3859
3860 /*
3861 * Free each page after tx, so the only ref left is
3862 * held by the network stack
3863 */
3864 for (; i > 0; i--)
3865 put_page(pages[i-1]);
3866
08a22b39
AK		 3867 /*
3868 * Acl update can result in inode attribute update.
3869 * so mark the attribute cache invalid.
3870 */
3871 spin_lock(&inode->i_lock);
3872 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3873 spin_unlock(&inode->i_lock);
f41f7418
TM		 3874 nfs_access_zap_cache(inode);
3875 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3876 return ret;
3877}
3878
16b4289c
TM		 3879static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3880{
3881 struct nfs4_exception exception = { };
3882 int err;
3883 do {
3884 err = nfs4_handle_exception(NFS_SERVER(inode),
3885 __nfs4_proc_set_acl(inode, buf, buflen),
3886 &exception);
3887 } while (exception.retry);
3888 return err;
3889}
3890
1da177e4 3891static int
aa5190d0 3892nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3893{
aa5190d0
TM		 3894 struct nfs_client *clp = server->nfs_client;
3895
3896 if (task->tk_status >= 0)
1da177e4
LT		 3897 return 0;
3898 switch(task->tk_status) {
a1d0b5ee 3899 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3900 case -NFS4ERR_ADMIN_REVOKED:
3901 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3902 if (state == NULL)
3903 break;
3904 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3905 case -NFS4ERR_OPENMODE:
3906 if (state == NULL)
3907 break;
0400a6b0
TM		 3908 nfs4_schedule_stateid_recovery(server, state);
3909 goto wait_on_recovery;
0ced63d1
TM		 3910 case -NFS4ERR_EXPIRED:
3911 if (state != NULL)
3912 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3913 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3914 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3915 nfs4_schedule_lease_recovery(clp);
3916 goto wait_on_recovery;
4745e315
AA		 3917#if defined(CONFIG_NFS_V4_1)
3918 case -NFS4ERR_BADSESSION:
3919 case -NFS4ERR_BADSLOT:
3920 case -NFS4ERR_BAD_HIGH_SLOT:
3921 case -NFS4ERR_DEADSESSION:
3922 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3923 case -NFS4ERR_SEQ_FALSE_RETRY:
3924 case -NFS4ERR_SEQ_MISORDERED:
3925 dprintk("%s ERROR %d, Reset session\n", __func__,
3926 task->tk_status);
9f594791 3927 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3928 task->tk_status = 0;
3929 return -EAGAIN;
3930#endif /* CONFIG_NFS_V4_1 */
1da177e4 3931 case -NFS4ERR_DELAY:
aa5190d0 3932 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3933 case -NFS4ERR_GRACE:
2c643488 3934 case -EKEYEXPIRED:
1da177e4
LT		 3935 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3936 task->tk_status = 0;
3937 return -EAGAIN;
a8a4ae3a 3938 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3939 case -NFS4ERR_OLD_STATEID:
3940 task->tk_status = 0;
3941 return -EAGAIN;
3942 }
3943 task->tk_status = nfs4_map_errors(task->tk_status);
3944 return 0;
0400a6b0 3945wait_on_recovery:
a2c0b9e2 3946 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3947 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3948 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3949 task->tk_status = 0;
3950 return -EAGAIN;
1da177e4
LT		 3951}
3952
f092075d
CL		 3953static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3954 nfs4_verifier *bootverf)
cd93710e
CL		 3955{
3956 __be32 verf[2];
3957
2c820d9a
CL		 3958 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3959 /* An impossible timestamp guarantees this value
3960 * will never match a generated boot time. */
3961 verf[0] = 0;
3962 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3963 } else {
f092075d
CL		 3964 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3965 verf[0] = (__be32)nn->boot_time.tv_sec;
3966 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3967 }
cd93710e
CL		 3968 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3969}
3970
bb8b27e5
TM		 3971int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3972 unsigned short port, struct rpc_cred *cred,
3973 struct nfs4_setclientid_res *res)
1da177e4
LT		 3974{
3975 nfs4_verifier sc_verifier;
3976 struct nfs4_setclientid setclientid = {
3977 .sc_verifier = &sc_verifier,
3978 .sc_prog = program,
f4eecd5d 3979 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3980 };
3981 struct rpc_message msg = {
3982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3983 .rpc_argp = &setclientid,
bb8b27e5 3984 .rpc_resp = res,
286d7d6a 3985 .rpc_cred = cred,
1da177e4 3986 };
1da177e4
LT		 3987 int loop = 0;
3988 int status;
3989
f092075d 3990 nfs4_init_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3991
3992 for(;;) {
2446ab60 3993 rcu_read_lock();
1da177e4 3994 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3995 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3996 clp->cl_ipaddr,
3997 rpc_peeraddr2str(clp->cl_rpcclient,
3998 RPC_DISPLAY_ADDR),
69dd716c
TM		 3999 rpc_peeraddr2str(clp->cl_rpcclient,
4000 RPC_DISPLAY_PROTO),
78ea323b 4001 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 4002 clp->cl_id_uniquifier);
4003 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4004 sizeof(setclientid.sc_netid),
4005 rpc_peeraddr2str(clp->cl_rpcclient,
4006 RPC_DISPLAY_NETID));
1da177e4 4007 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4008 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 4009 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 4010 rcu_read_unlock();
1da177e4 4011
1bd714f2 4012 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4013 if (status != -NFS4ERR_CLID_INUSE)
4014 break;
fd954ae1
TM		 4015 if (loop != 0) {
4016 ++clp->cl_id_uniquifier;
1da177e4 4017 break;
fd954ae1
TM		 4018 }
4019 ++loop;
4020 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 4021 }
4022 return status;
4023}
4024
fd954ae1 4025int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4026 struct nfs4_setclientid_res *arg,
4027 struct rpc_cred *cred)
1da177e4
LT		 4028{
4029 struct nfs_fsinfo fsinfo;
4030 struct rpc_message msg = {
4031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4032 .rpc_argp = arg,
1da177e4 4033 .rpc_resp = &fsinfo,
286d7d6a 4034 .rpc_cred = cred,
1da177e4
LT		 4035 };
4036 unsigned long now;
4037 int status;
4038
4039 now = jiffies;
1bd714f2 4040 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4041 if (status == 0) {
4042 spin_lock(&clp->cl_lock);
4043 clp->cl_lease_time = fsinfo.lease_time * HZ;
4044 clp->cl_last_renewal = now;
4045 spin_unlock(&clp->cl_lock);
4046 }
4047 return status;
4048}
4049
fe650407
TM		 4050struct nfs4_delegreturndata {
4051 struct nfs4_delegreturnargs args;
fa178f29 4052 struct nfs4_delegreturnres res;
fe650407
TM		 4053 struct nfs_fh fh;
4054 nfs4_stateid stateid;
26e976a8 4055 unsigned long timestamp;
fa178f29 4056 struct nfs_fattr fattr;
fe650407
TM		 4057 int rpc_status;
4058};
4059
fe650407
TM		 4060static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4061{
4062 struct nfs4_delegreturndata *data = calldata;
938e1010 4063
14516c3a
TM		 4064 if (!nfs4_sequence_done(task, &data->res.seq_res))
4065 return;
938e1010 4066
79708861
RL		 4067 switch (task->tk_status) {
4068 case -NFS4ERR_STALE_STATEID:
4069 case -NFS4ERR_EXPIRED:
4070 case 0:
fa178f29 4071 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4072 break;
4073 default:
4074 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4075 -EAGAIN) {
d00c5d43 4076 rpc_restart_call_prepare(task);
79708861
RL		 4077 return;
4078 }
4079 }
4080 data->rpc_status = task->tk_status;
fe650407
TM		 4081}
4082
4083static void nfs4_delegreturn_release(void *calldata)
4084{
fe650407
TM		 4085 kfree(calldata);
4086}
4087
938e1010
AA		 4088#if defined(CONFIG_NFS_V4_1)
4089static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4090{
4091 struct nfs4_delegreturndata *d_data;
4092
4093 d_data = (struct nfs4_delegreturndata *)data;
4094
035168ab 4095 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4096 &d_data->args.seq_args,
9d12b216 4097 &d_data->res.seq_res, task))
938e1010
AA		 4098 return;
4099 rpc_call_start(task);
4100}
4101#endif /* CONFIG_NFS_V4_1 */
4102
c8d149f3 4103static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4104#if defined(CONFIG_NFS_V4_1)
4105 .rpc_call_prepare = nfs4_delegreturn_prepare,
4106#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4107 .rpc_call_done = nfs4_delegreturn_done,
4108 .rpc_release = nfs4_delegreturn_release,
4109};
4110
e6f81075 4111static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4112{
4113 struct nfs4_delegreturndata *data;
fa178f29 4114 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4115 struct rpc_task *task;
5138fde0
TM		 4116 struct rpc_message msg = {
4117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4118 .rpc_cred = cred,
4119 };
c970aa85
TM		 4120 struct rpc_task_setup task_setup_data = {
4121 .rpc_client = server->client,
5138fde0 4122 .rpc_message = &msg,
c970aa85
TM		 4123 .callback_ops = &nfs4_delegreturn_ops,
4124 .flags = RPC_TASK_ASYNC,
4125 };
e6f81075 4126 int status = 0;
fe650407 4127
8535b2be 4128 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4129 if (data == NULL)
4130 return -ENOMEM;
9d12b216 4131 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4132 data->args.fhandle = &data->fh;
4133 data->args.stateid = &data->stateid;
9e907fec 4134 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4135 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4136 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4137 data->res.fattr = &data->fattr;
4138 data->res.server = server;
5138fde0 4139 nfs_fattr_init(data->res.fattr);
26e976a8 4140 data->timestamp = jiffies;
fe650407
TM		 4141 data->rpc_status = 0;
4142
c970aa85 4143 task_setup_data.callback_data = data;
1174dd1f
TM		 4144 msg.rpc_argp = &data->args;
4145 msg.rpc_resp = &data->res;
c970aa85 4146 task = rpc_run_task(&task_setup_data);
7a1218a2 4147 if (IS_ERR(task))
fe650407 4148 return PTR_ERR(task);
e6f81075
TM		 4149 if (!issync)
4150 goto out;
fe650407 4151 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4152 if (status != 0)
4153 goto out;
4154 status = data->rpc_status;
e144cbcc
TM		 4155 if (status == 0)
4156 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4157 else
4158 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4159out:
e6b3c4db 4160 rpc_put_task(task);
fe650407 4161 return status;
1da177e4
LT		 4162}
4163
e6f81075 4164int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4165{
4166 struct nfs_server *server = NFS_SERVER(inode);
4167 struct nfs4_exception exception = { };
4168 int err;
4169 do {
e6f81075 4170 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4171 switch (err) {
4172 case -NFS4ERR_STALE_STATEID:
4173 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4174 case 0:
4175 return 0;
4176 }
4177 err = nfs4_handle_exception(server, err, &exception);
4178 } while (exception.retry);
4179 return err;
4180}
4181
4182#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4183#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4184
4185/*
4186 * sleep, with exponential backoff, and retry the LOCK operation.
4187 */
4188static unsigned long
4189nfs4_set_lock_task_retry(unsigned long timeout)
4190{
d310310c 4191 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4192 timeout <<= 1;
4193 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4194 return NFS4_LOCK_MAXTIMEOUT;
4195 return timeout;
4196}
4197
1da177e4
LT		 4198static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4199{
4200 struct inode *inode = state->inode;
4201 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4202 struct nfs_client *clp = server->nfs_client;
911d1aaf 4203 struct nfs_lockt_args arg = {
1da177e4 4204 .fh = NFS_FH(inode),
911d1aaf 4205 .fl = request,
1da177e4 4206 };
911d1aaf
TM		 4207 struct nfs_lockt_res res = {
4208 .denied = request,
1da177e4
LT		 4209 };
4210 struct rpc_message msg = {
4211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4212 .rpc_argp = &arg,
4213 .rpc_resp = &res,
4214 .rpc_cred = state->owner->so_cred,
4215 };
1da177e4
LT		 4216 struct nfs4_lock_state *lsp;
4217 int status;
4218
911d1aaf 4219 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4220 status = nfs4_set_lock_state(state, request);
4221 if (status != 0)
4222 goto out;
4223 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4224 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4225 arg.lock_owner.s_dev = server->s_dev;
7c513058 4226 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4227 switch (status) {
4228 case 0:
4229 request->fl_type = F_UNLCK;
4230 break;
4231 case -NFS4ERR_DENIED:
4232 status = 0;
1da177e4 4233 }
70cc6487 4234 request->fl_ops->fl_release_private(request);
8d0a8a9d 4235out:
1da177e4
LT		 4236 return status;
4237}
4238
4239static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4240{
4241 struct nfs4_exception exception = { };
4242 int err;
4243
4244 do {
4245 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4246 _nfs4_proc_getlk(state, cmd, request),
4247 &exception);
4248 } while (exception.retry);
4249 return err;
4250}
4251
4252static int do_vfs_lock(struct file *file, struct file_lock *fl)
4253{
4254 int res = 0;
4255 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4256 case FL_POSIX:
4257 res = posix_lock_file_wait(file, fl);
4258 break;
4259 case FL_FLOCK:
4260 res = flock_lock_file_wait(file, fl);
4261 break;
4262 default:
4263 BUG();
4264 }
1da177e4
LT		 4265 return res;
4266}
4267
faf5f49c 4268struct nfs4_unlockdata {
911d1aaf
TM		 4269 struct nfs_locku_args arg;
4270 struct nfs_locku_res res;
faf5f49c
TM		 4271 struct nfs4_lock_state *lsp;
4272 struct nfs_open_context *ctx;
911d1aaf
TM		 4273 struct file_lock fl;
4274 const struct nfs_server *server;
26e976a8 4275 unsigned long timestamp;
faf5f49c
TM		 4276};
4277
911d1aaf
TM		 4278static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4279 struct nfs_open_context *ctx,
4280 struct nfs4_lock_state *lsp,
4281 struct nfs_seqid *seqid)
4282{
4283 struct nfs4_unlockdata *p;
4284 struct inode *inode = lsp->ls_state->inode;
4285
8535b2be 4286 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4287 if (p == NULL)
4288 return NULL;
4289 p->arg.fh = NFS_FH(inode);
4290 p->arg.fl = &p->fl;
4291 p->arg.seqid = seqid;
c1d51931 4292 p->res.seqid = seqid;
911d1aaf
TM		 4293 p->arg.stateid = &lsp->ls_stateid;
4294 p->lsp = lsp;
4295 atomic_inc(&lsp->ls_count);
4296 /* Ensure we don't close file until we're done freeing locks! */
4297 p->ctx = get_nfs_open_context(ctx);
4298 memcpy(&p->fl, fl, sizeof(p->fl));
4299 p->server = NFS_SERVER(inode);
4300 return p;
4301}
4302
06f814a3 4303static void nfs4_locku_release_calldata(void *data)
faf5f49c 4304{
963d8fe5 4305 struct nfs4_unlockdata *calldata = data;
911d1aaf 4306 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4307 nfs4_put_lock_state(calldata->lsp);
4308 put_nfs_open_context(calldata->ctx);
4309 kfree(calldata);
faf5f49c
TM		 4310}
4311
963d8fe5 4312static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4313{
963d8fe5 4314 struct nfs4_unlockdata *calldata = data;
faf5f49c 4315
14516c3a
TM		 4316 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4317 return;
faf5f49c
TM		 4318 switch (task->tk_status) {
4319 case 0:
f597c537
TM		 4320 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4321 &calldata->res.stateid);
26e976a8 4322 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4323 break;
9e33bed5
TM		 4324 case -NFS4ERR_BAD_STATEID:
4325 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4326 case -NFS4ERR_STALE_STATEID:
4327 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4328 break;
4329 default:
9e33bed5 4330 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4331 rpc_restart_call_prepare(task);
faf5f49c 4332 }
faf5f49c
TM		 4333}
4334
4ce70ada 4335static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4336{
4ce70ada 4337 struct nfs4_unlockdata *calldata = data;
faf5f49c 4338
911d1aaf 4339 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4340 return;
4341 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4342 /* Note: exit _without_ running nfs4_locku_done */
4343 task->tk_action = NULL;
faf5f49c
TM		 4344 return;
4345 }
26e976a8 4346 calldata->timestamp = jiffies;
035168ab 4347 if (nfs4_setup_sequence(calldata->server,
a893693c 4348 &calldata->arg.seq_args,
9d12b216 4349 &calldata->res.seq_res, task))
a893693c 4350 return;
5138fde0 4351 rpc_call_start(task);
faf5f49c
TM		 4352}
4353
963d8fe5 4354static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4355 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4356 .rpc_call_done = nfs4_locku_done,
06f814a3 4357 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4358};
4359
a5d16a4d
TM		 4360static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4361 struct nfs_open_context *ctx,
4362 struct nfs4_lock_state *lsp,
4363 struct nfs_seqid *seqid)
4364{
4365 struct nfs4_unlockdata *data;
5138fde0
TM		 4366 struct rpc_message msg = {
4367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4368 .rpc_cred = ctx->cred,
4369 };
c970aa85
TM		 4370 struct rpc_task_setup task_setup_data = {
4371 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4372 .rpc_message = &msg,
c970aa85 4373 .callback_ops = &nfs4_locku_ops,
101070ca 4374 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4375 .flags = RPC_TASK_ASYNC,
4376 };
a5d16a4d 4377
137d6aca
FF		 4378 /* Ensure this is an unlock - when canceling a lock, the
4379 * canceled lock is passed in, and it won't be an unlock.
4380 */
4381 fl->fl_type = F_UNLCK;
4382
a5d16a4d
TM		 4383 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4384 if (data == NULL) {
4385 nfs_free_seqid(seqid);
4386 return ERR_PTR(-ENOMEM);
4387 }
4388
9d12b216 4389 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4390 msg.rpc_argp = &data->arg;
4391 msg.rpc_resp = &data->res;
c970aa85
TM		 4392 task_setup_data.callback_data = data;
4393 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4394}
4395
faf5f49c
TM		 4396static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4397{
19e03c57 4398 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4399 struct nfs_seqid *seqid;
1da177e4 4400 struct nfs4_lock_state *lsp;
06f814a3
TM		 4401 struct rpc_task *task;
4402 int status = 0;
536ff0f8 4403 unsigned char fl_flags = request->fl_flags;
faf5f49c 4404
8d0a8a9d 4405 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4406 /* Unlock _before_ we do the RPC call */
4407 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4408 down_read(&nfsi->rwsem);
4409 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4410 up_read(&nfsi->rwsem);
9b073574 4411 goto out;
19e03c57
TM		 4412 }
4413 up_read(&nfsi->rwsem);
8d0a8a9d 4414 if (status != 0)
9b073574
TM		 4415 goto out;
4416 /* Is this a delegated lock? */
4417 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4418 goto out;
8d0a8a9d 4419 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4420 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4421 status = -ENOMEM;
911d1aaf 4422 if (seqid == NULL)
9b073574 4423 goto out;
cd3758e3 4424 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4425 status = PTR_ERR(task);
4426 if (IS_ERR(task))
9b073574 4427 goto out;
a5d16a4d 4428 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4429 rpc_put_task(task);
9b073574 4430out:
536ff0f8 4431 request->fl_flags = fl_flags;
1da177e4
LT		 4432 return status;
4433}
4434
a5d16a4d
TM		 4435struct nfs4_lockdata {
4436 struct nfs_lock_args arg;
4437 struct nfs_lock_res res;
4438 struct nfs4_lock_state *lsp;
4439 struct nfs_open_context *ctx;
4440 struct file_lock fl;
26e976a8 4441 unsigned long timestamp;
a5d16a4d
TM		 4442 int rpc_status;
4443 int cancelled;
66179efe 4444 struct nfs_server *server;
a5d16a4d
TM		 4445};
4446
4447static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4448 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4449 gfp_t gfp_mask)
1da177e4 4450{
a5d16a4d
TM		 4451 struct nfs4_lockdata *p;
4452 struct inode *inode = lsp->ls_state->inode;
1da177e4 4453 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4454
8535b2be 4455 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4456 if (p == NULL)
4457 return NULL;
4458
4459 p->arg.fh = NFS_FH(inode);
4460 p->arg.fl = &p->fl;
8535b2be 4461 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4462 if (p->arg.open_seqid == NULL)
4463 goto out_free;
8535b2be 4464 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4465 if (p->arg.lock_seqid == NULL)
2f74c0a0 4466 goto out_free_seqid;
a5d16a4d 4467 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4468 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4469 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4470 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4471 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4472 p->lsp = lsp;
66179efe 4473 p->server = server;
a5d16a4d
TM		 4474 atomic_inc(&lsp->ls_count);
4475 p->ctx = get_nfs_open_context(ctx);
4476 memcpy(&p->fl, fl, sizeof(p->fl));
4477 return p;
2f74c0a0
TM		 4478out_free_seqid:
4479 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4480out_free:
4481 kfree(p);
4482 return NULL;
4483}
4484
4485static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4486{
4487 struct nfs4_lockdata *data = calldata;
4488 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4489
3110ff80 4490 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4491 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4492 return;
a5d16a4d
TM		 4493 /* Do we need to do an open_to_lock_owner? */
4494 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4495 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4496 return;
a5d16a4d
TM		 4497 data->arg.open_stateid = &state->stateid;
4498 data->arg.new_lock_owner = 1;
c1d51931 4499 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4500 } else
4501 data->arg.new_lock_owner = 0;
26e976a8 4502 data->timestamp = jiffies;
035168ab
TM		 4503 if (nfs4_setup_sequence(data->server,
4504 &data->arg.seq_args,
9d12b216 4505 &data->res.seq_res, task))
66179efe 4506 return;
5138fde0 4507 rpc_call_start(task);
3110ff80 4508 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4509}
4510
b257957e
AB		 4511static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4512{
4513 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4514 nfs4_lock_prepare(task, calldata);
4515}
4516
a5d16a4d
TM		 4517static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4518{
4519 struct nfs4_lockdata *data = calldata;
4520
3110ff80 4521 dprintk("%s: begin!\n", __func__);
a5d16a4d 4522
14516c3a
TM		 4523 if (!nfs4_sequence_done(task, &data->res.seq_res))
4524 return;
66179efe 4525
a5d16a4d 4526 data->rpc_status = task->tk_status;
a5d16a4d 4527 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4528 if (data->rpc_status == 0)
4529 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4530 else
4531 goto out;
4532 }
4533 if (data->rpc_status == 0) {
f597c537 4534 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4535 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4536 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4537 }
a5d16a4d 4538out:
3110ff80 4539 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4540}
4541
4542static void nfs4_lock_release(void *calldata)
4543{
4544 struct nfs4_lockdata *data = calldata;
4545
3110ff80 4546 dprintk("%s: begin!\n", __func__);
2f74c0a0 4547 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4548 if (data->cancelled != 0) {
4549 struct rpc_task *task;
4550 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4551 data->arg.lock_seqid);
4552 if (!IS_ERR(task))
bf294b41 4553 rpc_put_task_async(task);
3110ff80 4554 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4555 } else
4556 nfs_free_seqid(data->arg.lock_seqid);
4557 nfs4_put_lock_state(data->lsp);
4558 put_nfs_open_context(data->ctx);
4559 kfree(data);
3110ff80 4560 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4561}
4562
4563static const struct rpc_call_ops nfs4_lock_ops = {
4564 .rpc_call_prepare = nfs4_lock_prepare,
4565 .rpc_call_done = nfs4_lock_done,
4566 .rpc_release = nfs4_lock_release,
4567};
4568
b257957e
AB		 4569static const struct rpc_call_ops nfs4_recover_lock_ops = {
4570 .rpc_call_prepare = nfs4_recover_lock_prepare,
4571 .rpc_call_done = nfs4_lock_done,
4572 .rpc_release = nfs4_lock_release,
4573};
4574
2bee72a6
TM		 4575static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4576{
2bee72a6
TM		 4577 switch (error) {
4578 case -NFS4ERR_ADMIN_REVOKED:
4579 case -NFS4ERR_BAD_STATEID:
ecac799a 4580 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4581 if (new_lock_owner != 0 ||
4582 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4583 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4584 break;
4585 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4586 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4587 case -NFS4ERR_EXPIRED:
4588 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4589 };
4590}
4591
afe6c27c 4592static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4593{
4594 struct nfs4_lockdata *data;
4595 struct rpc_task *task;
5138fde0
TM		 4596 struct rpc_message msg = {
4597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4598 .rpc_cred = state->owner->so_cred,
4599 };
c970aa85
TM		 4600 struct rpc_task_setup task_setup_data = {
4601 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4602 .rpc_message = &msg,
c970aa85 4603 .callback_ops = &nfs4_lock_ops,
101070ca 4604 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4605 .flags = RPC_TASK_ASYNC,
4606 };
a5d16a4d
TM		 4607 int ret;
4608
3110ff80 4609 dprintk("%s: begin!\n", __func__);
cd3758e3 4610 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4611 fl->fl_u.nfs4_fl.owner,
4612 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4613 if (data == NULL)
4614 return -ENOMEM;
4615 if (IS_SETLKW(cmd))
4616 data->arg.block = 1;
b257957e
AB		 4617 if (recovery_type > NFS_LOCK_NEW) {
4618 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4619 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4620 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4621 }
9d12b216 4622 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4623 msg.rpc_argp = &data->arg;
4624 msg.rpc_resp = &data->res;
c970aa85
TM		 4625 task_setup_data.callback_data = data;
4626 task = rpc_run_task(&task_setup_data);
7a1218a2 4627 if (IS_ERR(task))
a5d16a4d 4628 return PTR_ERR(task);
a5d16a4d
TM		 4629 ret = nfs4_wait_for_completion_rpc_task(task);
4630 if (ret == 0) {
4631 ret = data->rpc_status;
2bee72a6
TM		 4632 if (ret)
4633 nfs4_handle_setlk_error(data->server, data->lsp,
4634 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4635 } else
4636 data->cancelled = 1;
e6b3c4db 4637 rpc_put_task(task);
3110ff80 4638 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4639 return ret;
1da177e4
LT		 4640}
4641
4642static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4643{
202b50dc 4644 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4645 struct nfs4_exception exception = {
4646 .inode = state->inode,
4647 };
202b50dc
TM		 4648 int err;
4649
4650 do {
42a2d13e
TM		 4651 /* Cache the lock if possible... */
4652 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4653 return 0;
afe6c27c 4654 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4655 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4656 break;
4657 nfs4_handle_exception(server, err, &exception);
4658 } while (exception.retry);
4659 return err;
1da177e4
LT		 4660}
4661
4662static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4663{
202b50dc 4664 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4665 struct nfs4_exception exception = {
4666 .inode = state->inode,
4667 };
202b50dc
TM		 4668 int err;
4669
6bfc93ef
TM		 4670 err = nfs4_set_lock_state(state, request);
4671 if (err != 0)
4672 return err;
202b50dc 4673 do {
42a2d13e
TM		 4674 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4675 return 0;
afe6c27c 4676 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4677 switch (err) {
4678 default:
4679 goto out;
4680 case -NFS4ERR_GRACE:
4681 case -NFS4ERR_DELAY:
4682 nfs4_handle_exception(server, err, &exception);
4683 err = 0;
4684 }
202b50dc 4685 } while (exception.retry);
a9ed2e25 4686out:
202b50dc 4687 return err;
1da177e4
LT		 4688}
4689
f062eb6c 4690#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4691static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4692{
b01dd1d8
BS		 4693 int status, ret = NFS_OK;
4694 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4695 struct nfs_server *server = NFS_SERVER(state->inode);
4696
b01dd1d8
BS		 4697 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4698 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4699 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4700 if (status != NFS_OK) {
89af2739
CL		 4701 if (status != -NFS4ERR_BAD_STATEID)
4702 nfs41_free_stateid(server,
4703 &lsp->ls_stateid);
b01dd1d8
BS		 4704 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4705 ret = status;
4706 }
4707 }
4708 };
4709
4710 return ret;
4711}
4712
4713static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4714{
4715 int status = NFS_OK;
4716
4717 if (test_bit(LK_STATE_IN_USE, &state->flags))
4718 status = nfs41_check_expired_locks(state);
f062eb6c 4719 if (status == NFS_OK)
b01dd1d8 4720 return status;
f062eb6c
BS		 4721 return nfs4_lock_expired(state, request);
4722}
4723#endif
4724
1da177e4
LT		 4725static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4726{
19e03c57 4727 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4728 unsigned char fl_flags = request->fl_flags;
8e469ebd 4729 int status = -ENOLCK;
1da177e4 4730
8e469ebd
TM		 4731 if ((fl_flags & FL_POSIX) &&
4732 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4733 goto out;
6bfc93ef 4734 /* Is this a delegated open? */
6bfc93ef
TM		 4735 status = nfs4_set_lock_state(state, request);
4736 if (status != 0)
4737 goto out;
01c3b861
TM		 4738 request->fl_flags |= FL_ACCESS;
4739 status = do_vfs_lock(request->fl_file, request);
4740 if (status < 0)
4741 goto out;
19e03c57 4742 down_read(&nfsi->rwsem);
01c3b861 4743 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4744 /* Yes: cache locks! */
01c3b861 4745 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4746 request->fl_flags = fl_flags & ~FL_SLEEP;
4747 status = do_vfs_lock(request->fl_file, request);
4748 goto out_unlock;
01c3b861 4749 }
afe6c27c 4750 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4751 if (status != 0)
01c3b861 4752 goto out_unlock;
6bfc93ef 4753 /* Note: we always want to sleep here! */
01c3b861 4754 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4755 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4756 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4757 "manager!\n", __func__);
01c3b861 4758out_unlock:
19e03c57 4759 up_read(&nfsi->rwsem);
01c3b861
TM		 4760out:
4761 request->fl_flags = fl_flags;
1da177e4
LT		 4762 return status;
4763}
4764
4765static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4766{
a1d0b5ee
TM		 4767 struct nfs4_exception exception = {
4768 .state = state,
05ffe24f 4769 .inode = state->inode,
a1d0b5ee 4770 };
1da177e4
LT		 4771 int err;
4772
4773 do {
965b5d67
TM		 4774 err = _nfs4_proc_setlk(state, cmd, request);
4775 if (err == -NFS4ERR_DENIED)
4776 err = -EAGAIN;
1da177e4 4777 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4778 err, &exception);
1da177e4
LT		 4779 } while (exception.retry);
4780 return err;
4781}
4782
4783static int
4784nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4785{
4786 struct nfs_open_context *ctx;
4787 struct nfs4_state *state;
4788 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4789 int status;
4790
4791 /* verify open state */
cd3758e3 4792 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4793 state = ctx->state;
4794
4795 if (request->fl_start < 0 || request->fl_end < 0)
4796 return -EINVAL;
4797
d953126a
TM		 4798 if (IS_GETLK(cmd)) {
4799 if (state != NULL)
4800 return nfs4_proc_getlk(state, F_GETLK, request);
4801 return 0;
4802 }
1da177e4
LT		 4803
4804 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4805 return -EINVAL;
4806
d953126a
TM		 4807 if (request->fl_type == F_UNLCK) {
4808 if (state != NULL)
4809 return nfs4_proc_unlck(state, cmd, request);
4810 return 0;
4811 }
1da177e4 4812
d953126a
TM		 4813 if (state == NULL)
4814 return -ENOLCK;
55725513
TM		 4815 /*
4816 * Don't rely on the VFS having checked the file open mode,
4817 * since it won't do this for flock() locks.
4818 */
4819 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4820 case F_RDLCK:
4821 if (!(filp->f_mode & FMODE_READ))
4822 return -EBADF;
4823 break;
4824 case F_WRLCK:
4825 if (!(filp->f_mode & FMODE_WRITE))
4826 return -EBADF;
4827 }
4828
1da177e4
LT		 4829 do {
4830 status = nfs4_proc_setlk(state, cmd, request);
4831 if ((status != -EAGAIN) || IS_SETLK(cmd))
4832 break;
4833 timeout = nfs4_set_lock_task_retry(timeout);
4834 status = -ERESTARTSYS;
4835 if (signalled())
4836 break;
4837 } while(status < 0);
1da177e4
LT		 4838 return status;
4839}
4840
888e694c
TM		 4841int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4842{
4843 struct nfs_server *server = NFS_SERVER(state->inode);
4844 struct nfs4_exception exception = { };
4845 int err;
4846
4847 err = nfs4_set_lock_state(state, fl);
4848 if (err != 0)
4849 goto out;
4850 do {
afe6c27c 4851 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4852 switch (err) {
4853 default:
a030889a
WAA		 4854 printk(KERN_ERR "NFS: %s: unhandled error "
4855 "%d.\n", __func__, err);
d5122201 4856 case 0:
965b5d67 4857 case -ESTALE:
d5122201
TM		 4858 goto out;
4859 case -NFS4ERR_EXPIRED:
0ced63d1 4860 nfs4_schedule_stateid_recovery(server, state);
d5122201 4861 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4862 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4863 nfs4_schedule_lease_recovery(server->nfs_client);
4864 goto out;
74e7bb73
RL		 4865 case -NFS4ERR_BADSESSION:
4866 case -NFS4ERR_BADSLOT:
4867 case -NFS4ERR_BAD_HIGH_SLOT:
4868 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4869 case -NFS4ERR_DEADSESSION:
9f594791 4870 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4871 goto out;
965b5d67
TM		 4872 case -ERESTARTSYS:
4873 /*
4874 * The show must go on: exit, but mark the
4875 * stateid as needing recovery.
4876 */
a1d0b5ee 4877 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4878 case -NFS4ERR_ADMIN_REVOKED:
4879 case -NFS4ERR_BAD_STATEID:
4880 case -NFS4ERR_OPENMODE:
0400a6b0 4881 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4882 err = 0;
4883 goto out;
168667c4
TM		 4884 case -EKEYEXPIRED:
4885 /*
4886 * User RPCSEC_GSS context has expired.
4887 * We cannot recover this stateid now, so
4888 * skip it and allow recovery thread to
4889 * proceed.
4890 */
4891 err = 0;
4892 goto out;
965b5d67
TM		 4893 case -ENOMEM:
4894 case -NFS4ERR_DENIED:
4895 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4896 err = 0;
4897 goto out;
d5122201
TM		 4898 case -NFS4ERR_DELAY:
4899 break;
4900 }
888e694c
TM		 4901 err = nfs4_handle_exception(server, err, &exception);
4902 } while (exception.retry);
4903out:
4904 return err;
4905}
6b3b5496 4906
cf470c3e
TM		 4907struct nfs_release_lockowner_data {
4908 struct nfs4_lock_state *lsp;
5ae67c4f 4909 struct nfs_server *server;
cf470c3e
TM		 4910 struct nfs_release_lockowner_args args;
4911};
4912
d3c7b7cc
TM		 4913static void nfs4_release_lockowner_release(void *calldata)
4914{
cf470c3e 4915 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4916 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4917 kfree(calldata);
4918}
4919
17280175 4920static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4921 .rpc_release = nfs4_release_lockowner_release,
4922};
4923
cf470c3e 4924int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4925{
4926 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4927 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4928 struct rpc_message msg = {
4929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4930 };
4931
4932 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4933 return -EINVAL;
4934 data = kmalloc(sizeof(*data), GFP_NOFS);
4935 if (!data)
4936 return -ENOMEM;
4937 data->lsp = lsp;
5ae67c4f 4938 data->server = server;
cf470c3e
TM		 4939 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4940 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4941 data->args.lock_owner.s_dev = server->s_dev;
4942 msg.rpc_argp = &data->args;
4943 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4944 return 0;
d3c7b7cc
TM		 4945}
4946
aa1870af
BF		 4947#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4948
64c2ce8b
AK		 4949static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4950 const void *buf, size_t buflen,
4951 int flags, int type)
6b3b5496 4952{
64c2ce8b
AK		 4953 if (strcmp(key, "") != 0)
4954 return -EINVAL;
4b580ee3 4955
64c2ce8b 4956 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4957}
4958
64c2ce8b
AK		 4959static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4960 void *buf, size_t buflen, int type)
6b3b5496 4961{
64c2ce8b
AK		 4962 if (strcmp(key, "") != 0)
4963 return -EINVAL;
aa1870af 4964
64c2ce8b 4965 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4966}
4967
64c2ce8b
AK		 4968static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4969 size_t list_len, const char *name,
4970 size_t name_len, int type)
6b3b5496 4971{
64c2ce8b 4972 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4973
096455a2
BF		 4974 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4975 return 0;
64c2ce8b
AK		 4976
4977 if (list && len <= list_len)
4978 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4979 return len;
6b3b5496
BF		 4980}
4981
533eb461
AA		 4982/*
4983 * nfs_fhget will use either the mounted_on_fileid or the fileid
4984 */
69aaaae1
TM		 4985static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4986{
533eb461
AA		 4987 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4988 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4989 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4990 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4991 return;
4992
4993 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4994 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4995 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4996 fattr->nlink = 2;
4997}
4998
f05d147f
BS		 4999static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5000 const struct qstr *name,
5001 struct nfs4_fs_locations *fs_locations,
5002 struct page *page)
683b57b4
TM		 5003{
5004 struct nfs_server *server = NFS_SERVER(dir);
5005 u32 bitmask[2] = {
361e624f 5006 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5007 };
5008 struct nfs4_fs_locations_arg args = {
5009 .dir_fh = NFS_FH(dir),
c228fd3a 5010 .name = name,
683b57b4
TM		 5011 .page = page,
5012 .bitmask = bitmask,
5013 };
22958463
BH		 5014 struct nfs4_fs_locations_res res = {
5015 .fs_locations = fs_locations,
5016 };
683b57b4
TM		 5017 struct rpc_message msg = {
5018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5019 .rpc_argp = &args,
22958463 5020 .rpc_resp = &res,
683b57b4
TM		 5021 };
5022 int status;
5023
3110ff80 5024 dprintk("%s: start\n", __func__);
533eb461
AA		 5025
5026 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5027 * is not supported */
5028 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5029 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5030 else
5031 bitmask[0] |= FATTR4_WORD0_FILEID;
5032
c228fd3a 5033 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5034 fs_locations->server = server;
830b8e33 5035 fs_locations->nlocations = 0;
f05d147f 5036 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5037 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5038 return status;
5039}
5040
f05d147f
BS		 5041int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5042 const struct qstr *name,
5043 struct nfs4_fs_locations *fs_locations,
5044 struct page *page)
db0a9593
BS		 5045{
5046 struct nfs4_exception exception = { };
5047 int err;
5048 do {
5049 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5050 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5051 &exception);
5052 } while (exception.retry);
5053 return err;
5054}
5055
5a5ea0d4
BS		 5056static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5057{
5058 int status;
5059 struct nfs4_secinfo_arg args = {
5060 .dir_fh = NFS_FH(dir),
5061 .name = name,
5062 };
5063 struct nfs4_secinfo_res res = {
5064 .flavors = flavors,
5065 };
5066 struct rpc_message msg = {
5067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5068 .rpc_argp = &args,
5069 .rpc_resp = &res,
5070 };
5071
5072 dprintk("NFS call secinfo %s\n", name->name);
5073 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5074 dprintk("NFS reply secinfo: %d\n", status);
5075 return status;
5076}
5077
72de53ec
BS		 5078int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5079 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5080{
5081 struct nfs4_exception exception = { };
5082 int err;
5083 do {
5084 err = nfs4_handle_exception(NFS_SERVER(dir),
5085 _nfs4_proc_secinfo(dir, name, flavors),
5086 &exception);
5087 } while (exception.retry);
5088 return err;
5089}
5090
557134a3 5091#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5092/*
5093 * Check the exchange flags returned by the server for invalid flags, having
5094 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5095 * DS flags set.
5096 */
5097static int nfs4_check_cl_exchange_flags(u32 flags)
5098{
5099 if (flags & ~EXCHGID4_FLAG_MASK_R)
5100 goto out_inval;
5101 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5102 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5103 goto out_inval;
5104 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5105 goto out_inval;
5106 return NFS_OK;
5107out_inval:
5108 return -NFS4ERR_INVAL;
5109}
5110
78fe0f41 5111static bool
79d4e1f0
CL		 5112nfs41_same_server_scope(struct nfs41_server_scope *a,
5113 struct nfs41_server_scope *b)
78fe0f41
WAA		 5114{
5115 if (a->server_scope_sz == b->server_scope_sz &&
5116 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5117 return true;
5118
5119 return false;
5120}
5121
7c44f1ae
WAA		 5122/*
5123 * nfs4_proc_bind_conn_to_session()
5124 *
5125 * The 4.1 client currently uses the same TCP connection for the
5126 * fore and backchannel.
5127 */
2cf047c9 5128int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5129{
5130 int status;
5131 struct nfs41_bind_conn_to_session_res res;
5132 struct rpc_message msg = {
5133 .rpc_proc =
5134 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5135 .rpc_argp = clp,
5136 .rpc_resp = &res,
2cf047c9 5137 .rpc_cred = cred,
7c44f1ae
WAA		 5138 };
5139
5140 dprintk("--> %s\n", __func__);
5141 BUG_ON(clp == NULL);
5142
5143 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5144 if (unlikely(res.session == NULL)) {
5145 status = -ENOMEM;
5146 goto out;
5147 }
5148
5149 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5150 if (status == 0) {
5151 if (memcmp(res.session->sess_id.data,
5152 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5153 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5154 status = -EIO;
5155 goto out_session;
5156 }
5157 if (res.dir != NFS4_CDFS4_BOTH) {
5158 dprintk("NFS: %s: Unexpected direction from server\n",
5159 __func__);
5160 status = -EIO;
5161 goto out_session;
5162 }
5163 if (res.use_conn_in_rdma_mode) {
5164 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5165 __func__);
5166 status = -EIO;
5167 goto out_session;
5168 }
5169 }
5170out_session:
5171 kfree(res.session);
5172out:
5173 dprintk("<-- %s status= %d\n", __func__, status);
5174 return status;
5175}
5176
99fe60d0
BH		 5177/*
5178 * nfs4_proc_exchange_id()
5179 *
5180 * Since the clientid has expired, all compounds using sessions
5181 * associated with the stale clientid will be returning
5182 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5183 * be in some phase of session reset.
5184 */
4d643d1d 5185int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5186{
5187 nfs4_verifier verifier;
5188 struct nfs41_exchange_id_args args = {
cd93710e 5189 .verifier = &verifier,
99fe60d0 5190 .client = clp,
357f54d6 5191 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5192 };
5193 struct nfs41_exchange_id_res res = {
32b01310 5194 0
99fe60d0
BH		 5195 };
5196 int status;
5197 struct rpc_message msg = {
5198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5199 .rpc_argp = &args,
5200 .rpc_resp = &res,
5201 .rpc_cred = cred,
5202 };
99fe60d0
BH		 5203
5204 dprintk("--> %s\n", __func__);
5205 BUG_ON(clp == NULL);
a7b72103 5206
f092075d 5207 nfs4_init_boot_verifier(clp, &verifier);
99fe60d0 5208
c7a360b0 5209 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5210 "%s/%s/%u",
c7a360b0 5211 clp->cl_ipaddr,
3617e503 5212 clp->cl_rpcclient->cl_nodename,
c7a360b0 5213 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5214
acdeb69d 5215 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5216 GFP_NOFS);
acdeb69d 5217 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5218 status = -ENOMEM;
5219 goto out;
5220 }
78fe0f41 5221
79d4e1f0 5222 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5223 GFP_NOFS);
177313f1 5224 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5225 status = -ENOMEM;
acdeb69d 5226 goto out_server_owner;
abe9a6d5 5227 }
78fe0f41 5228
bbafffd2 5229 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5230 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5231 status = -ENOMEM;
5232 goto out_server_scope;
5233 }
5234
1bd714f2 5235 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5236 if (status == 0)
32b01310 5237 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5238
acdeb69d 5239 if (status == 0) {
32b01310
TM		 5240 clp->cl_clientid = res.clientid;
5241 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5242 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5243 clp->cl_seqid = res.seqid;
5244
acdeb69d
CL		 5245 kfree(clp->cl_serverowner);
5246 clp->cl_serverowner = res.server_owner;
5247 res.server_owner = NULL;
78fe0f41 5248
7d2ed9ac 5249 /* use the most recent implementation id */
59155546
CL		 5250 kfree(clp->cl_implid);
5251 clp->cl_implid = res.impl_id;
7d2ed9ac 5252
177313f1 5253 if (clp->cl_serverscope != NULL &&
79d4e1f0 5254 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5255 res.server_scope)) {
5256 dprintk("%s: server_scope mismatch detected\n",
5257 __func__);
5258 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5259 kfree(clp->cl_serverscope);
5260 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5261 }
5262
177313f1 5263 if (clp->cl_serverscope == NULL) {
79d4e1f0 5264 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5265 goto out;
5266 }
32b01310
TM		 5267 } else
5268 kfree(res.impl_id);
7d2ed9ac 5269
acdeb69d
CL		 5270out_server_owner:
5271 kfree(res.server_owner);
7d2ed9ac 5272out_server_scope:
abe9a6d5
WAA		 5273 kfree(res.server_scope);
5274out:
177313f1 5275 if (clp->cl_implid != NULL)
7d2ed9ac
WAA		 5276 dprintk("%s: Server Implementation ID: "
5277 "domain: %s, name: %s, date: %llu,%u\n",
59155546
CL		 5278 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5279 clp->cl_implid->date.seconds,
5280 clp->cl_implid->date.nseconds);
99fe60d0
BH		 5281 dprintk("<-- %s status= %d\n", __func__, status);
5282 return status;
5283}
5284
66245539
TM		 5285static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5286 struct rpc_cred *cred)
5287{
5288 struct rpc_message msg = {
5289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5290 .rpc_argp = clp,
5291 .rpc_cred = cred,
5292 };
5293 int status;
5294
5295 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5296 if (status)
02c67525 5297 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5298 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5299 return status;
5300}
5301
5302static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5303 struct rpc_cred *cred)
5304{
5305 unsigned int loop;
5306 int ret;
5307
5308 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5309 ret = _nfs4_proc_destroy_clientid(clp, cred);
5310 switch (ret) {
5311 case -NFS4ERR_DELAY:
5312 case -NFS4ERR_CLIENTID_BUSY:
5313 ssleep(1);
5314 break;
5315 default:
5316 return ret;
5317 }
5318 }
5319 return 0;
5320}
5321
5322int nfs4_destroy_clientid(struct nfs_client *clp)
5323{
5324 struct rpc_cred *cred;
5325 int ret = 0;
5326
5327 if (clp->cl_mvops->minor_version < 1)
5328 goto out;
5329 if (clp->cl_exchange_flags == 0)
5330 goto out;
5331 cred = nfs4_get_exchange_id_cred(clp);
5332 ret = nfs4_proc_destroy_clientid(clp, cred);
5333 if (cred)
5334 put_rpccred(cred);
5335 switch (ret) {
5336 case 0:
5337 case -NFS4ERR_STALE_CLIENTID:
5338 clp->cl_exchange_flags = 0;
5339 }
5340out:
5341 return ret;
5342}
5343
2050f0cc
AA		 5344struct nfs4_get_lease_time_data {
5345 struct nfs4_get_lease_time_args *args;
5346 struct nfs4_get_lease_time_res *res;
5347 struct nfs_client *clp;
5348};
5349
5350static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5351 void *calldata)
5352{
5353 int ret;
5354 struct nfs4_get_lease_time_data *data =
5355 (struct nfs4_get_lease_time_data *)calldata;
5356
5357 dprintk("--> %s\n", __func__);
689cf5c1 5358 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5359 /* just setup sequence, do not trigger session recovery
5360 since we're invoked within one */
5361 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5362 &data->args->la_seq_args,
9d12b216 5363 &data->res->lr_seq_res, task);
2050f0cc
AA		 5364
5365 BUG_ON(ret == -EAGAIN);
5366 rpc_call_start(task);
5367 dprintk("<-- %s\n", __func__);
5368}
5369
5370/*
5371 * Called from nfs4_state_manager thread for session setup, so don't recover
5372 * from sequence operation or clientid errors.
5373 */
5374static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5375{
5376 struct nfs4_get_lease_time_data *data =
5377 (struct nfs4_get_lease_time_data *)calldata;
5378
5379 dprintk("--> %s\n", __func__);
14516c3a
TM		 5380 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5381 return;
2050f0cc
AA		 5382 switch (task->tk_status) {
5383 case -NFS4ERR_DELAY:
5384 case -NFS4ERR_GRACE:
5385 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5386 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5387 task->tk_status = 0;
a8a4ae3a
AA		 5388 /* fall through */
5389 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5390 rpc_restart_call_prepare(task);
2050f0cc
AA		 5391 return;
5392 }
2050f0cc
AA		 5393 dprintk("<-- %s\n", __func__);
5394}
5395
17280175 5396static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5397 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5398 .rpc_call_done = nfs4_get_lease_time_done,
5399};
5400
5401int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5402{
5403 struct rpc_task *task;
5404 struct nfs4_get_lease_time_args args;
5405 struct nfs4_get_lease_time_res res = {
5406 .lr_fsinfo = fsinfo,
5407 };
5408 struct nfs4_get_lease_time_data data = {
5409 .args = &args,
5410 .res = &res,
5411 .clp = clp,
5412 };
5413 struct rpc_message msg = {
5414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5415 .rpc_argp = &args,
5416 .rpc_resp = &res,
5417 };
5418 struct rpc_task_setup task_setup = {
5419 .rpc_client = clp->cl_rpcclient,
5420 .rpc_message = &msg,
5421 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5422 .callback_data = &data,
5423 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5424 };
5425 int status;
5426
9d12b216 5427 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5428 dprintk("--> %s\n", __func__);
5429 task = rpc_run_task(&task_setup);
5430
5431 if (IS_ERR(task))
5432 status = PTR_ERR(task);
5433 else {
5434 status = task->tk_status;
5435 rpc_put_task(task);
5436 }
5437 dprintk("<-- %s return %d\n", __func__, status);
5438
5439 return status;
5440}
5441
f86f36a6
TM		 5442static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5443{
5444 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5445}
5446
5447static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5448 struct nfs4_slot *new,
5449 u32 max_slots,
5450 u32 ivalue)
5451{
5452 struct nfs4_slot *old = NULL;
5453 u32 i;
5454
5455 spin_lock(&tbl->slot_tbl_lock);
5456 if (new) {
5457 old = tbl->slots;
5458 tbl->slots = new;
5459 tbl->max_slots = max_slots;
5460 }
5461 tbl->highest_used_slotid = -1; /* no slot is currently used */
5462 for (i = 0; i < tbl->max_slots; i++)
5463 tbl->slots[i].seq_nr = ivalue;
5464 spin_unlock(&tbl->slot_tbl_lock);
5465 kfree(old);
5466}
5467
b73dafa7 5468/*
f86f36a6 5469 * (re)Initialise a slot table
b73dafa7 5470 */
f86f36a6
TM		 5471static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5472 u32 ivalue)
ac72b7b3 5473{
104aeba4 5474 struct nfs4_slot *new = NULL;
f86f36a6 5475 int ret = -ENOMEM;
ac72b7b3 5476
104aeba4
AA		 5477 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5478 max_reqs, tbl->max_slots);
ac72b7b3 5479
104aeba4
AA		 5480 /* Does the newly negotiated max_reqs match the existing slot table? */
5481 if (max_reqs != tbl->max_slots) {
f86f36a6 5482 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5483 if (!new)
5484 goto out;
104aeba4 5485 }
f86f36a6
TM		 5486 ret = 0;
5487
5488 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5489 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5490 tbl, tbl->slots, tbl->max_slots);
5491out:
5492 dprintk("<-- %s: return %d\n", __func__, ret);
5493 return ret;
5494}
5495
f8625a6a
RL		 5496/* Destroy the slot table */
5497static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5498{
5499 if (session->fc_slot_table.slots != NULL) {
5500 kfree(session->fc_slot_table.slots);
5501 session->fc_slot_table.slots = NULL;
5502 }
5503 if (session->bc_slot_table.slots != NULL) {
5504 kfree(session->bc_slot_table.slots);
5505 session->bc_slot_table.slots = NULL;
5506 }
5507 return;
5508}
5509
050047ce 5510/*
aacd5537 5511 * Initialize or reset the forechannel and backchannel tables
050047ce 5512 */
aacd5537 5513static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5514{
f26468fb 5515 struct nfs4_slot_table *tbl;
aacd5537 5516 int status;
050047ce 5517
aacd5537
AA		 5518 dprintk("--> %s\n", __func__);
5519 /* Fore channel */
5520 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5521 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5522 if (status) /* -ENOMEM */
5523 return status;
aacd5537
AA		 5524 /* Back channel */
5525 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5526 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5527 if (status && tbl->slots == NULL)
5528 /* Fore and back channel share a connection so get
5529 * both slot tables or neither */
5530 nfs4_destroy_slot_tables(ses);
f8625a6a 5531 return status;
557134a3
AA		 5532}
5533
5534struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5535{
5536 struct nfs4_session *session;
5537 struct nfs4_slot_table *tbl;
5538
8535b2be 5539 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5540 if (!session)
5541 return NULL;
76db6d95 5542
557134a3 5543 tbl = &session->fc_slot_table;
45d43c29 5544 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5545 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5546 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5547 init_completion(&tbl->complete);
f8625a6a
RL		 5548
5549 tbl = &session->bc_slot_table;
45d43c29 5550 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5551 spin_lock_init(&tbl->slot_tbl_lock);
5552 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5553 init_completion(&tbl->complete);
f8625a6a 5554
1055d76d
TM		 5555 session->session_state = 1<<NFS4_SESSION_INITING;
5556
557134a3
AA		 5557 session->clp = clp;
5558 return session;
5559}
5560
5561void nfs4_destroy_session(struct nfs4_session *session)
5562{
2446ab60 5563 struct rpc_xprt *xprt;
848f5bda 5564 struct rpc_cred *cred;
2446ab60 5565
848f5bda
TM		 5566 cred = nfs4_get_exchange_id_cred(session->clp);
5567 nfs4_proc_destroy_session(session, cred);
5568 if (cred)
5569 put_rpccred(cred);
2446ab60
TM		 5570
5571 rcu_read_lock();
5572 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5573 rcu_read_unlock();
5a0ffe54 5574 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5575 __func__, xprt);
5576 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5577 nfs4_destroy_slot_tables(session);
557134a3
AA		 5578 kfree(session);
5579}
5580
fc931582
AA		 5581/*
5582 * Initialize the values to be used by the client in CREATE_SESSION
5583 * If nfs4_init_session set the fore channel request and response sizes,
5584 * use them.
5585 *
5586 * Set the back channel max_resp_sz_cached to zero to force the client to
5587 * always set csa_cachethis to FALSE because the current implementation
5588 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5589 */
5590static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5591{
5592 struct nfs4_session *session = args->client->cl_session;
5593 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5594 mxresp_sz = session->fc_attrs.max_resp_sz;
5595
5596 if (mxrqst_sz == 0)
5597 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5598 if (mxresp_sz == 0)
5599 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5600 /* Fore channel attributes */
fc931582
AA		 5601 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5602 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5603 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5604 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5605
5606 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5607 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5608 __func__,
5609 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5610 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5611
5612 /* Back channel attributes */
fc931582
AA		 5613 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5614 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5615 args->bc_attrs.max_resp_sz_cached = 0;
5616 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5617 args->bc_attrs.max_reqs = 1;
5618
5619 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5620 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5621 __func__,
5622 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5623 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5624 args->bc_attrs.max_reqs);
5625}
5626
43c2e885 5627static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5628{
43c2e885
BF		 5629 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5630 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5631
43c2e885
BF		 5632 if (rcvd->max_resp_sz > sent->max_resp_sz)
5633 return -EINVAL;
5634 /*
5635 * Our requested max_ops is the minimum we need; we're not
5636 * prepared to break up compounds into smaller pieces than that.
5637 * So, no point even trying to continue if the server won't
5638 * cooperate:
5639 */
5640 if (rcvd->max_ops < sent->max_ops)
5641 return -EINVAL;
5642 if (rcvd->max_reqs == 0)
5643 return -EINVAL;
b4b9a0c1
VG		 5644 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5645 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5646 return 0;
8d35301d
AA		 5647}
5648
43c2e885
BF		 5649static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5650{
5651 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5652 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5653
43c2e885
BF		 5654 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5655 return -EINVAL;
5656 if (rcvd->max_resp_sz < sent->max_resp_sz)
5657 return -EINVAL;
5658 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5659 return -EINVAL;
5660 /* These would render the backchannel useless: */
b4b9a0c1 5661 if (rcvd->max_ops != sent->max_ops)
43c2e885 5662 return -EINVAL;
b4b9a0c1 5663 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5664 return -EINVAL;
5665 return 0;
5666}
8d35301d 5667
8d35301d
AA		 5668static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5669 struct nfs4_session *session)
5670{
43c2e885 5671 int ret;
8d35301d 5672
43c2e885
BF		 5673 ret = nfs4_verify_fore_channel_attrs(args, session);
5674 if (ret)
5675 return ret;
5676 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5677}
5678
848f5bda
TM		 5679static int _nfs4_proc_create_session(struct nfs_client *clp,
5680 struct rpc_cred *cred)
fc931582
AA		 5681{
5682 struct nfs4_session *session = clp->cl_session;
5683 struct nfs41_create_session_args args = {
5684 .client = clp,
5685 .cb_program = NFS4_CALLBACK,
5686 };
5687 struct nfs41_create_session_res res = {
5688 .client = clp,
5689 };
5690 struct rpc_message msg = {
5691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5692 .rpc_argp = &args,
5693 .rpc_resp = &res,
848f5bda 5694 .rpc_cred = cred,
fc931582
AA		 5695 };
5696 int status;
5697
5698 nfs4_init_channel_attrs(&args);
0f91421e 5699 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5700
1bd714f2 5701 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5702
8d35301d
AA		 5703 if (!status)
5704 /* Verify the session's negotiated channel_attrs values */
5705 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5706 if (!status) {
5707 /* Increment the clientid slot sequence id */
5708 clp->cl_seqid++;
5709 }
5710
5711 return status;
5712}
5713
5714/*
5715 * Issues a CREATE_SESSION operation to the server.
5716 * It is the responsibility of the caller to verify the session is
5717 * expired before calling this routine.
5718 */
848f5bda 5719int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5720{
5721 int status;
5722 unsigned *ptr;
fc931582
AA		 5723 struct nfs4_session *session = clp->cl_session;
5724
5725 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5726
848f5bda 5727 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5728 if (status)
5729 goto out;
5730
aacd5537
AA		 5731 /* Init or reset the session slot tables */
5732 status = nfs4_setup_session_slot_tables(session);
5733 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5734 if (status)
5735 goto out;
5736
5737 ptr = (unsigned *)&session->sess_id.data[0];
5738 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5739 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5740out:
5741 dprintk("<-- %s\n", __func__);
5742 return status;
5743}
5744
0f3e66c6
AA		 5745/*
5746 * Issue the over-the-wire RPC DESTROY_SESSION.
5747 * The caller must serialize access to this routine.
5748 */
848f5bda
TM		 5749int nfs4_proc_destroy_session(struct nfs4_session *session,
5750 struct rpc_cred *cred)
0f3e66c6 5751{
848f5bda
TM		 5752 struct rpc_message msg = {
5753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5754 .rpc_argp = session,
5755 .rpc_cred = cred,
5756 };
0f3e66c6 5757 int status = 0;
0f3e66c6
AA		 5758
5759 dprintk("--> nfs4_proc_destroy_session\n");
5760
5761 /* session is still being setup */
5762 if (session->clp->cl_cons_state != NFS_CS_READY)
5763 return status;
5764
1bd714f2 5765 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5766
5767 if (status)
08106ac7 5768 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5769 "Session has been destroyed regardless...\n", status);
5770
5771 dprintk("<-- nfs4_proc_destroy_session\n");
5772 return status;
5773}
5774
7b38c368
TM		 5775/*
5776 * With sessions, the client is not marked ready until after a
5777 * successful EXCHANGE_ID and CREATE_SESSION.
5778 *
5779 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5780 * other versions of NFS can be tried.
5781 */
5782static int nfs41_check_session_ready(struct nfs_client *clp)
5783{
5784 int ret;
5785
5786 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5787 ret = nfs4_client_recover_expired_lease(clp);
5788 if (ret)
5789 return ret;
5790 }
5791 if (clp->cl_cons_state < NFS_CS_READY)
5792 return -EPROTONOSUPPORT;
54ac471c 5793 smp_rmb();
7b38c368
TM		 5794 return 0;
5795}
5796
fccba804
TM		 5797int nfs4_init_session(struct nfs_server *server)
5798{
5799 struct nfs_client *clp = server->nfs_client;
2449ea2e 5800 struct nfs4_session *session;
68bf05ef 5801 unsigned int rsize, wsize;
fccba804
TM		 5802
5803 if (!nfs4_has_session(clp))
5804 return 0;
5805
1055d76d 5806 session = clp->cl_session;
7b38c368
TM		 5807 spin_lock(&clp->cl_lock);
5808 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5809
7b38c368
TM		 5810 rsize = server->rsize;
5811 if (rsize == 0)
5812 rsize = NFS_MAX_FILE_IO_SIZE;
5813 wsize = server->wsize;
5814 if (wsize == 0)
5815 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5816
7b38c368
TM		 5817 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5818 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5819 }
5820 spin_unlock(&clp->cl_lock);
2449ea2e 5821
7b38c368 5822 return nfs41_check_session_ready(clp);
fccba804
TM		 5823}
5824
7b38c368 5825int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5826{
5827 struct nfs4_session *session = clp->cl_session;
5828 int ret;
5829
7b38c368
TM		 5830 spin_lock(&clp->cl_lock);
5831 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5832 /*
5833 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5834 * DS lease to be equal to the MDS lease.
5835 */
5836 clp->cl_lease_time = lease_time;
5837 clp->cl_last_renewal = jiffies;
5838 }
5839 spin_unlock(&clp->cl_lock);
d83217c1 5840
7b38c368
TM		 5841 ret = nfs41_check_session_ready(clp);
5842 if (ret)
5843 return ret;
5844 /* Test for the DS role */
5845 if (!is_ds_client(clp))
5846 return -ENODEV;
5847 return 0;
d83217c1
AA		 5848}
5849EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5850
5851
fc01cea9
AA		 5852/*
5853 * Renew the cl_session lease.
5854 */
d5f8d3fe
TM		 5855struct nfs4_sequence_data {
5856 struct nfs_client *clp;
5857 struct nfs4_sequence_args args;
5858 struct nfs4_sequence_res res;
5859};
5860
dc96aef9
AB		 5861static void nfs41_sequence_release(void *data)
5862{
d5f8d3fe
TM		 5863 struct nfs4_sequence_data *calldata = data;
5864 struct nfs_client *clp = calldata->clp;
dc96aef9 5865
7135840f
AB		 5866 if (atomic_read(&clp->cl_count) > 1)
5867 nfs4_schedule_state_renewal(clp);
5868 nfs_put_client(clp);
d5f8d3fe 5869 kfree(calldata);
dc96aef9
AB		 5870}
5871
aa5190d0
TM		 5872static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5873{
5874 switch(task->tk_status) {
5875 case -NFS4ERR_DELAY:
aa5190d0
TM		 5876 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5877 return -EAGAIN;
5878 default:
0400a6b0 5879 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5880 }
5881 return 0;
5882}
5883
dc96aef9 5884static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5885{
d5f8d3fe
TM		 5886 struct nfs4_sequence_data *calldata = data;
5887 struct nfs_client *clp = calldata->clp;
fc01cea9 5888
14516c3a
TM		 5889 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5890 return;
fc01cea9
AA		 5891
5892 if (task->tk_status < 0) {
5893 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5894 if (atomic_read(&clp->cl_count) == 1)
5895 goto out;
fc01cea9 5896
aa5190d0
TM		 5897 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5898 rpc_restart_call_prepare(task);
fc01cea9
AA		 5899 return;
5900 }
5901 }
fc01cea9 5902 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5903out:
fc01cea9
AA		 5904 dprintk("<-- %s\n", __func__);
5905}
5906
5907static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5908{
d5f8d3fe
TM		 5909 struct nfs4_sequence_data *calldata = data;
5910 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5911 struct nfs4_sequence_args *args;
5912 struct nfs4_sequence_res *res;
5913
fc01cea9
AA		 5914 args = task->tk_msg.rpc_argp;
5915 res = task->tk_msg.rpc_resp;
5916
9d12b216 5917 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5918 return;
5919 rpc_call_start(task);
5920}
5921
5922static const struct rpc_call_ops nfs41_sequence_ops = {
5923 .rpc_call_done = nfs41_sequence_call_done,
5924 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5925 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5926};
5927
71ac6da9 5928static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5929{
d5f8d3fe 5930 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5931 struct rpc_message msg = {
5932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5933 .rpc_cred = cred,
5934 };
71ac6da9
TM		 5935 struct rpc_task_setup task_setup_data = {
5936 .rpc_client = clp->cl_rpcclient,
5937 .rpc_message = &msg,
5938 .callback_ops = &nfs41_sequence_ops,
5939 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5940 };
fc01cea9 5941
7135840f 5942 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5943 return ERR_PTR(-EIO);
dfb4f309 5944 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5945 if (calldata == NULL) {
7135840f 5946 nfs_put_client(clp);
71ac6da9 5947 return ERR_PTR(-ENOMEM);
fc01cea9 5948 }
9d12b216 5949 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5950 msg.rpc_argp = &calldata->args;
5951 msg.rpc_resp = &calldata->res;
5952 calldata->clp = clp;
71ac6da9 5953 task_setup_data.callback_data = calldata;
fc01cea9 5954
71ac6da9
TM		 5955 return rpc_run_task(&task_setup_data);
5956}
5957
2f60ea6b 5958static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5959{
5960 struct rpc_task *task;
5961 int ret = 0;
5962
2f60ea6b
TM		 5963 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5964 return 0;
71ac6da9
TM		 5965 task = _nfs41_proc_sequence(clp, cred);
5966 if (IS_ERR(task))
5967 ret = PTR_ERR(task);
5968 else
bf294b41 5969 rpc_put_task_async(task);
71ac6da9
TM		 5970 dprintk("<-- %s status=%d\n", __func__, ret);
5971 return ret;
5972}
5973
5974static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5975{
5976 struct rpc_task *task;
5977 int ret;
5978
5979 task = _nfs41_proc_sequence(clp, cred);
5980 if (IS_ERR(task)) {
5981 ret = PTR_ERR(task);
5982 goto out;
5983 }
5984 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5985 if (!ret) {
5986 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5987
5988 if (task->tk_status == 0)
5989 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5990 ret = task->tk_status;
b4410c2f 5991 }
71ac6da9
TM		 5992 rpc_put_task(task);
5993out:
5994 dprintk("<-- %s status=%d\n", __func__, ret);
5995 return ret;
fc01cea9
AA		 5996}
5997
fce5c838
RL		 5998struct nfs4_reclaim_complete_data {
5999 struct nfs_client *clp;
6000 struct nfs41_reclaim_complete_args arg;
6001 struct nfs41_reclaim_complete_res res;
6002};
6003
6004static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6005{
6006 struct nfs4_reclaim_complete_data *calldata = data;
6007
b257957e 6008 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6009 if (nfs41_setup_sequence(calldata->clp->cl_session,
6010 &calldata->arg.seq_args,
9d12b216 6011 &calldata->res.seq_res, task))
fce5c838
RL		 6012 return;
6013
6014 rpc_call_start(task);
6015}
6016
aa5190d0
TM		 6017static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6018{
6019 switch(task->tk_status) {
6020 case 0:
6021 case -NFS4ERR_COMPLETE_ALREADY:
6022 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6023 break;
6024 case -NFS4ERR_DELAY:
aa5190d0 6025 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6026 /* fall through */
6027 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6028 return -EAGAIN;
6029 default:
0400a6b0 6030 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6031 }
6032 return 0;
6033}
6034
fce5c838
RL		 6035static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6036{
6037 struct nfs4_reclaim_complete_data *calldata = data;
6038 struct nfs_client *clp = calldata->clp;
6039 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6040
6041 dprintk("--> %s\n", __func__);
14516c3a
TM		 6042 if (!nfs41_sequence_done(task, res))
6043 return;
fce5c838 6044
aa5190d0
TM		 6045 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6046 rpc_restart_call_prepare(task);
6047 return;
6048 }
fce5c838
RL		 6049 dprintk("<-- %s\n", __func__);
6050}
6051
6052static void nfs4_free_reclaim_complete_data(void *data)
6053{
6054 struct nfs4_reclaim_complete_data *calldata = data;
6055
6056 kfree(calldata);
6057}
6058
6059static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6060 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6061 .rpc_call_done = nfs4_reclaim_complete_done,
6062 .rpc_release = nfs4_free_reclaim_complete_data,
6063};
6064
6065/*
6066 * Issue a global reclaim complete.
6067 */
6068static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6069{
6070 struct nfs4_reclaim_complete_data *calldata;
6071 struct rpc_task *task;
6072 struct rpc_message msg = {
6073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6074 };
6075 struct rpc_task_setup task_setup_data = {
6076 .rpc_client = clp->cl_rpcclient,
6077 .rpc_message = &msg,
6078 .callback_ops = &nfs4_reclaim_complete_call_ops,
6079 .flags = RPC_TASK_ASYNC,
6080 };
6081 int status = -ENOMEM;
6082
6083 dprintk("--> %s\n", __func__);
8535b2be 6084 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6085 if (calldata == NULL)
6086 goto out;
6087 calldata->clp = clp;
6088 calldata->arg.one_fs = 0;
fce5c838 6089
9d12b216 6090 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6091 msg.rpc_argp = &calldata->arg;
6092 msg.rpc_resp = &calldata->res;
6093 task_setup_data.callback_data = calldata;
6094 task = rpc_run_task(&task_setup_data);
acf82b85 6095 if (IS_ERR(task)) {
fce5c838 6096 status = PTR_ERR(task);
acf82b85
DC		 6097 goto out;
6098 }
c34c32ea
AA		 6099 status = nfs4_wait_for_completion_rpc_task(task);
6100 if (status == 0)
6101 status = task->tk_status;
fce5c838 6102 rpc_put_task(task);
acf82b85 6103 return 0;
fce5c838
RL		 6104out:
6105 dprintk("<-- %s status=%d\n", __func__, status);
6106 return status;
6107}
b1f69b75
AA		 6108
6109static void
6110nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6111{
6112 struct nfs4_layoutget *lgp = calldata;
c31663d4 6113 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6114
6115 dprintk("--> %s\n", __func__);
c31663d4
FI		 6116 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6117 * right now covering the LAYOUTGET we are about to send.
6118 * However, that is not so catastrophic, and there seems
6119 * to be no way to prevent it completely.
6120 */
b1f69b75 6121 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6122 &lgp->res.seq_res, task))
b1f69b75 6123 return;
cf7d63f1
FI		 6124 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6125 NFS_I(lgp->args.inode)->layout,
6126 lgp->args.ctx->state)) {
6127 rpc_exit(task, NFS4_OK);
6128 return;
6129 }
b1f69b75
AA		 6130 rpc_call_start(task);
6131}
6132
6133static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6134{
6135 struct nfs4_layoutget *lgp = calldata;
6136 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6137
6138 dprintk("--> %s\n", __func__);
6139
6140 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6141 return;
6142
6143 switch (task->tk_status) {
6144 case 0:
6145 break;
6146 case -NFS4ERR_LAYOUTTRYLATER:
6147 case -NFS4ERR_RECALLCONFLICT:
6148 task->tk_status = -NFS4ERR_DELAY;
6149 /* Fall through */
6150 default:
6151 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6152 rpc_restart_call_prepare(task);
6153 return;
6154 }
6155 }
b1f69b75
AA		 6156 dprintk("<-- %s\n", __func__);
6157}
6158
6159static void nfs4_layoutget_release(void *calldata)
6160{
6161 struct nfs4_layoutget *lgp = calldata;
6162
6163 dprintk("--> %s\n", __func__);
b1f69b75
AA		 6164 put_nfs_open_context(lgp->args.ctx);
6165 kfree(calldata);
6166 dprintk("<-- %s\n", __func__);
6167}
6168
6169static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6170 .rpc_call_prepare = nfs4_layoutget_prepare,
6171 .rpc_call_done = nfs4_layoutget_done,
6172 .rpc_release = nfs4_layoutget_release,
6173};
6174
6175int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6176{
6177 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6178 struct rpc_task *task;
6179 struct rpc_message msg = {
6180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6181 .rpc_argp = &lgp->args,
6182 .rpc_resp = &lgp->res,
6183 };
6184 struct rpc_task_setup task_setup_data = {
6185 .rpc_client = server->client,
6186 .rpc_message = &msg,
6187 .callback_ops = &nfs4_layoutget_call_ops,
6188 .callback_data = lgp,
6189 .flags = RPC_TASK_ASYNC,
6190 };
6191 int status = 0;
6192
6193 dprintk("--> %s\n", __func__);
6194
35124a09 6195 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6196 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6197 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6198 task = rpc_run_task(&task_setup_data);
6199 if (IS_ERR(task))
6200 return PTR_ERR(task);
6201 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6202 if (status == 0)
6203 status = task->tk_status;
6204 if (status == 0)
6205 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6206 rpc_put_task(task);
6207 dprintk("<-- %s status=%d\n", __func__, status);
6208 return status;
6209}
6210
cbe82603
BH		 6211static void
6212nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6213{
6214 struct nfs4_layoutreturn *lrp = calldata;
6215
6216 dprintk("--> %s\n", __func__);
6217 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6218 &lrp->res.seq_res, task))
cbe82603
BH		 6219 return;
6220 rpc_call_start(task);
6221}
6222
6223static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6224{
6225 struct nfs4_layoutreturn *lrp = calldata;
6226 struct nfs_server *server;
a56aaa02 6227 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6228
6229 dprintk("--> %s\n", __func__);
6230
6231 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6232 return;
6233
6234 server = NFS_SERVER(lrp->args.inode);
6235 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6236 rpc_restart_call_prepare(task);
cbe82603
BH		 6237 return;
6238 }
a2e1d4f2 6239 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6240 if (task->tk_status == 0) {
cbe82603 6241 if (lrp->res.lrs_present) {
cbe82603 6242 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6243 } else
6244 BUG_ON(!list_empty(&lo->plh_segs));
6245 }
a2e1d4f2
FI		 6246 lo->plh_block_lgets--;
6247 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6248 dprintk("<-- %s\n", __func__);
6249}
6250
6251static void nfs4_layoutreturn_release(void *calldata)
6252{
6253 struct nfs4_layoutreturn *lrp = calldata;
6254
6255 dprintk("--> %s\n", __func__);
a56aaa02 6256 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6257 kfree(calldata);
6258 dprintk("<-- %s\n", __func__);
6259}
6260
6261static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6262 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6263 .rpc_call_done = nfs4_layoutreturn_done,
6264 .rpc_release = nfs4_layoutreturn_release,
6265};
6266
6267int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6268{
6269 struct rpc_task *task;
6270 struct rpc_message msg = {
6271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6272 .rpc_argp = &lrp->args,
6273 .rpc_resp = &lrp->res,
6274 };
6275 struct rpc_task_setup task_setup_data = {
6276 .rpc_client = lrp->clp->cl_rpcclient,
6277 .rpc_message = &msg,
6278 .callback_ops = &nfs4_layoutreturn_call_ops,
6279 .callback_data = lrp,
6280 };
6281 int status;
6282
6283 dprintk("--> %s\n", __func__);
9d12b216 6284 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6285 task = rpc_run_task(&task_setup_data);
6286 if (IS_ERR(task))
6287 return PTR_ERR(task);
6288 status = task->tk_status;
6289 dprintk("<-- %s status=%d\n", __func__, status);
6290 rpc_put_task(task);
6291 return status;
6292}
6293
7f11d8d3
AA		 6294/*
6295 * Retrieve the list of Data Server devices from the MDS.
6296 */
6297static int _nfs4_getdevicelist(struct nfs_server *server,
6298 const struct nfs_fh *fh,
6299 struct pnfs_devicelist *devlist)
6300{
6301 struct nfs4_getdevicelist_args args = {
6302 .fh = fh,
6303 .layoutclass = server->pnfs_curr_ld->id,
6304 };
6305 struct nfs4_getdevicelist_res res = {
6306 .devlist = devlist,
6307 };
6308 struct rpc_message msg = {
6309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6310 .rpc_argp = &args,
6311 .rpc_resp = &res,
6312 };
6313 int status;
6314
6315 dprintk("--> %s\n", __func__);
6316 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6317 &res.seq_res, 0);
6318 dprintk("<-- %s status=%d\n", __func__, status);
6319 return status;
6320}
6321
6322int nfs4_proc_getdevicelist(struct nfs_server *server,
6323 const struct nfs_fh *fh,
6324 struct pnfs_devicelist *devlist)
6325{
6326 struct nfs4_exception exception = { };
6327 int err;
6328
6329 do {
6330 err = nfs4_handle_exception(server,
6331 _nfs4_getdevicelist(server, fh, devlist),
6332 &exception);
6333 } while (exception.retry);
6334
6335 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6336 err, devlist->num_devs);
6337
6338 return err;
6339}
6340EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6341
b1f69b75
AA		 6342static int
6343_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6344{
6345 struct nfs4_getdeviceinfo_args args = {
6346 .pdev = pdev,
6347 };
6348 struct nfs4_getdeviceinfo_res res = {
6349 .pdev = pdev,
6350 };
6351 struct rpc_message msg = {
6352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6353 .rpc_argp = &args,
6354 .rpc_resp = &res,
6355 };
6356 int status;
6357
6358 dprintk("--> %s\n", __func__);
7c513058 6359 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6360 dprintk("<-- %s status=%d\n", __func__, status);
6361
6362 return status;
6363}
6364
6365int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6366{
6367 struct nfs4_exception exception = { };
6368 int err;
6369
6370 do {
6371 err = nfs4_handle_exception(server,
6372 _nfs4_proc_getdeviceinfo(server, pdev),
6373 &exception);
6374 } while (exception.retry);
6375 return err;
6376}
6377EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6378
863a3c6c
AA		 6379static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6380{
6381 struct nfs4_layoutcommit_data *data = calldata;
6382 struct nfs_server *server = NFS_SERVER(data->args.inode);
6383
6384 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6385 &data->res.seq_res, task))
863a3c6c
AA		 6386 return;
6387 rpc_call_start(task);
6388}
6389
6390static void
6391nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6392{
6393 struct nfs4_layoutcommit_data *data = calldata;
6394 struct nfs_server *server = NFS_SERVER(data->args.inode);
6395
6396 if (!nfs4_sequence_done(task, &data->res.seq_res))
6397 return;
6398
6399 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6400 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6401 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6402 case -NFS4ERR_BADLAYOUT: /* no layout */
6403 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6404 task->tk_status = 0;
e59d27e0
TM		 6405 break;
6406 case 0:
863a3c6c
AA		 6407 nfs_post_op_update_inode_force_wcc(data->args.inode,
6408 data->res.fattr);
e59d27e0
TM		 6409 break;
6410 default:
6411 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6412 rpc_restart_call_prepare(task);
6413 return;
6414 }
6415 }
863a3c6c
AA		 6416}
6417
6418static void nfs4_layoutcommit_release(void *calldata)
6419{
6420 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6421 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6422 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6423
db29c089 6424 pnfs_cleanup_layoutcommit(data);
863a3c6c 6425 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6426 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6427 list_del_init(&lseg->pls_lc_list);
6428 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6429 &lseg->pls_flags))
6430 put_lseg(lseg);
6431 }
92407e75
PT		 6432
6433 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6434 smp_mb__after_clear_bit();
6435 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6436
863a3c6c
AA		 6437 put_rpccred(data->cred);
6438 kfree(data);
6439}
6440
6441static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6442 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6443 .rpc_call_done = nfs4_layoutcommit_done,
6444 .rpc_release = nfs4_layoutcommit_release,
6445};
6446
6447int
ef311537 6448nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6449{
6450 struct rpc_message msg = {
6451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6452 .rpc_argp = &data->args,
6453 .rpc_resp = &data->res,
6454 .rpc_cred = data->cred,
6455 };
6456 struct rpc_task_setup task_setup_data = {
6457 .task = &data->task,
6458 .rpc_client = NFS_CLIENT(data->args.inode),
6459 .rpc_message = &msg,
6460 .callback_ops = &nfs4_layoutcommit_ops,
6461 .callback_data = data,
6462 .flags = RPC_TASK_ASYNC,
6463 };
6464 struct rpc_task *task;
6465 int status = 0;
6466
6467 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6468 "lbw: %llu inode %lu\n",
6469 data->task.tk_pid, sync,
6470 data->args.lastbytewritten,
6471 data->args.inode->i_ino);
6472
9d12b216 6473 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6474 task = rpc_run_task(&task_setup_data);
6475 if (IS_ERR(task))
6476 return PTR_ERR(task);
ef311537 6477 if (sync == false)
863a3c6c
AA		 6478 goto out;
6479 status = nfs4_wait_for_completion_rpc_task(task);
6480 if (status != 0)
6481 goto out;
6482 status = task->tk_status;
6483out:
6484 dprintk("%s: status %d\n", __func__, status);
6485 rpc_put_task(task);
6486 return status;
6487}
fca78d6d
BS		 6488
6489static int
6490_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6491 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6492{
6493 struct nfs41_secinfo_no_name_args args = {
6494 .style = SECINFO_STYLE_CURRENT_FH,
6495 };
6496 struct nfs4_secinfo_res res = {
6497 .flavors = flavors,
6498 };
6499 struct rpc_message msg = {
6500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6501 .rpc_argp = &args,
6502 .rpc_resp = &res,
6503 };
6504 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6505}
6506
6507static int
6508nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6509 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6510{
6511 struct nfs4_exception exception = { };
6512 int err;
6513 do {
6514 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6515 switch (err) {
6516 case 0:
6517 case -NFS4ERR_WRONGSEC:
6518 case -NFS4ERR_NOTSUPP:
05e9cfb4 6519 goto out;
fca78d6d
BS		 6520 default:
6521 err = nfs4_handle_exception(server, err, &exception);
6522 }
6523 } while (exception.retry);
05e9cfb4 6524out:
fca78d6d
BS		 6525 return err;
6526}
6527
6528static int
6529nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6530 struct nfs_fsinfo *info)
6531{
6532 int err;
6533 struct page *page;
6534 rpc_authflavor_t flavor;
6535 struct nfs4_secinfo_flavors *flavors;
6536
6537 page = alloc_page(GFP_KERNEL);
6538 if (!page) {
6539 err = -ENOMEM;
6540 goto out;
6541 }
6542
6543 flavors = page_address(page);
6544 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6545
6546 /*
6547 * Fall back on "guess and check" method if
6548 * the server doesn't support SECINFO_NO_NAME
6549 */
6550 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6551 err = nfs4_find_root_sec(server, fhandle, info);
6552 goto out_freepage;
6553 }
6554 if (err)
6555 goto out_freepage;
6556
6557 flavor = nfs_find_best_sec(flavors);
6558 if (err == 0)
6559 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6560
6561out_freepage:
6562 put_page(page);
6563 if (err == -EACCES)
6564 return -EPERM;
6565out:
6566 return err;
6567}
1cab0652
BS		 6568
6569static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6570{
6571 int status;
6572 struct nfs41_test_stateid_args args = {
1cab0652 6573 .stateid = stateid,
7d974794
BS		 6574 };
6575 struct nfs41_test_stateid_res res;
6576 struct rpc_message msg = {
6577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6578 .rpc_argp = &args,
6579 .rpc_resp = &res,
6580 };
1cab0652 6581
9d12b216 6582 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6583 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
377e507d
CL		 6584 if (status != NFS_OK)
6585 return status;
6586 return -res.status;
7d974794
BS		 6587}
6588
1cab0652 6589static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6590{
6591 struct nfs4_exception exception = { };
6592 int err;
6593 do {
377e507d
CL		 6594 err = _nfs41_test_stateid(server, stateid);
6595 if (err != -NFS4ERR_DELAY)
6596 break;
6597 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6598 } while (exception.retry);
6599 return err;
6600}
9aeda35f 6601
1cab0652 6602static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6603{
9aeda35f 6604 struct nfs41_free_stateid_args args = {
1cab0652 6605 .stateid = stateid,
9aeda35f
BS		 6606 };
6607 struct nfs41_free_stateid_res res;
6608 struct rpc_message msg = {
6609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6610 .rpc_argp = &args,
6611 .rpc_resp = &res,
6612 };
6613
9d12b216 6614 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
377e507d
CL		 6615 return nfs4_call_sync_sequence(server->client, server, &msg,
6616 &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6617}
6618
1cab0652 6619static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6620{
6621 struct nfs4_exception exception = { };
6622 int err;
6623 do {
377e507d
CL		 6624 err = _nfs4_free_stateid(server, stateid);
6625 if (err != -NFS4ERR_DELAY)
6626 break;
6627 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6628 } while (exception.retry);
6629 return err;
6630}
36281caa
TM		 6631
6632static bool nfs41_match_stateid(const nfs4_stateid *s1,
6633 const nfs4_stateid *s2)
6634{
2d2f24ad 6635 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6636 return false;
6637
2d2f24ad 6638 if (s1->seqid == s2->seqid)
36281caa 6639 return true;
2d2f24ad 6640 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6641 return true;
6642
6643 return false;
6644}
6645
557134a3
AA		 6646#endif /* CONFIG_NFS_V4_1 */
6647
36281caa
TM		 6648static bool nfs4_match_stateid(const nfs4_stateid *s1,
6649 const nfs4_stateid *s2)
6650{
f597c537 6651 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6652}
6653
6654
17280175 6655static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6656 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6657 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6658 .recover_open = nfs4_open_reclaim,
6659 .recover_lock = nfs4_lock_reclaim,
591d71cb 6660 .establish_clid = nfs4_init_clientid,
90a16617 6661 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6662};
6663
591d71cb 6664#if defined(CONFIG_NFS_V4_1)
17280175 6665static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6666 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6667 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6668 .recover_open = nfs4_open_reclaim,
6669 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6670 .establish_clid = nfs41_init_clientid,
b4b82607 6671 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6672 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6673};
6674#endif /* CONFIG_NFS_V4_1 */
6675
17280175 6676static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6677 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6678 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6679 .recover_open = nfs4_open_expired,
6680 .recover_lock = nfs4_lock_expired,
6681 .establish_clid = nfs4_init_clientid,
90a16617 6682 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6683};
6684
6685#if defined(CONFIG_NFS_V4_1)
17280175 6686static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6687 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6688 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6689 .recover_open = nfs41_open_expired,
6690 .recover_lock = nfs41_lock_expired,
4d643d1d 6691 .establish_clid = nfs41_init_clientid,
b4b82607 6692 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6693};
591d71cb 6694#endif /* CONFIG_NFS_V4_1 */
1da177e4 6695
17280175 6696static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6697 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6698 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6699 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6700};
6701
6702#if defined(CONFIG_NFS_V4_1)
17280175 6703static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6704 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6705 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6706 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6707};
6708#endif
6709
97dc1359
TM		 6710static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6711 .minor_version = 0,
6712 .call_sync = _nfs4_call_sync,
36281caa 6713 .match_stateid = nfs4_match_stateid,
fca78d6d 6714 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6715 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6716 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6717 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6718};
6719
6720#if defined(CONFIG_NFS_V4_1)
6721static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6722 .minor_version = 1,
6723 .call_sync = _nfs4_call_sync_session,
36281caa 6724 .match_stateid = nfs41_match_stateid,
fca78d6d 6725 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6726 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6727 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6728 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6729};
6730#endif
6731
97dc1359
TM		 6732const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6733 [0] = &nfs_v4_0_minor_ops,
6734#if defined(CONFIG_NFS_V4_1)
6735 [1] = &nfs_v4_1_minor_ops,
6736#endif
6737};
6738
92e1d5be 6739static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6740 .permission = nfs_permission,
6741 .getattr = nfs_getattr,
6742 .setattr = nfs_setattr,
64c2ce8b
AK		 6743 .getxattr = generic_getxattr,
6744 .setxattr = generic_setxattr,
6745 .listxattr = generic_listxattr,
6746 .removexattr = generic_removexattr,
6b3b5496
BF		 6747};
6748
509de811 6749const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6750 .version = 4, /* protocol version */
6751 .dentry_ops = &nfs4_dentry_operations,
6752 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6753 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6754 .file_ops = &nfs4_file_operations,
1da177e4 6755 .getroot = nfs4_proc_get_root,
281cad46 6756 .submount = nfs4_submount,
1da177e4
LT		 6757 .getattr = nfs4_proc_getattr,
6758 .setattr = nfs4_proc_setattr,
6759 .lookup = nfs4_proc_lookup,
6760 .access = nfs4_proc_access,
6761 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6762 .create = nfs4_proc_create,
6763 .remove = nfs4_proc_remove,
6764 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6765 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6766 .unlink_done = nfs4_proc_unlink_done,
6767 .rename = nfs4_proc_rename,
d3d4152a 6768 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6769 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6770 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6771 .link = nfs4_proc_link,
6772 .symlink = nfs4_proc_symlink,
6773 .mkdir = nfs4_proc_mkdir,
6774 .rmdir = nfs4_proc_remove,
6775 .readdir = nfs4_proc_readdir,
6776 .mknod = nfs4_proc_mknod,
6777 .statfs = nfs4_proc_statfs,
6778 .fsinfo = nfs4_proc_fsinfo,
6779 .pathconf = nfs4_proc_pathconf,
e9326dca 6780 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6781 .decode_dirent = nfs4_decode_dirent,
6782 .read_setup = nfs4_proc_read_setup,
1abb5088 6783 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6784 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6785 .read_done = nfs4_read_done,
1da177e4 6786 .write_setup = nfs4_proc_write_setup,
57208fa7 6787 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6788 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6789 .write_done = nfs4_write_done,
1da177e4 6790 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6791 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6792 .commit_done = nfs4_commit_done,
1da177e4 6793 .lock = nfs4_proc_lock,
e50a1c2e 6794 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6795 .close_context = nfs4_close_context,
2b484297 6796 .open_context = nfs4_atomic_open,
011e2a7f 6797 .have_delegation = nfs4_have_delegation,
57ec14c5 6798 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6799 .alloc_client = nfs4_alloc_client,
45a52a02 6800 .init_client = nfs4_init_client,
cdb7eced 6801 .free_client = nfs4_free_client,
1da177e4
LT		 6802};
6803
64c2ce8b
AK		 6804static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6805 .prefix = XATTR_NAME_NFSV4_ACL,
6806 .list = nfs4_xattr_list_nfs4_acl,
6807 .get = nfs4_xattr_get_nfs4_acl,
6808 .set = nfs4_xattr_set_nfs4_acl,
6809};
6810
6811const struct xattr_handler *nfs4_xattr_handlers[] = {
6812 &nfs4_xattr_nfs4_acl_handler,
6813 NULL
6814};
6815
ef159e91
TM		 6816module_param(max_session_slots, ushort, 0644);
6817MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6818 "requests the client will negotiate");
6819
1da177e4
LT		 6820/*
6821 * Local variables:
6822 * c-basic-offset: 8
6823 * End:
6824 */
Linux 6.x block layer and io_uring tree(s)