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NFSv4.1 do not send LAYOUTRETURN on emtpy plh_segs list
[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) {
1767 nfs41_free_stateid(server, stateid);
1768 state->flags &= ~flags;
1769 }
1770 }
1771 return status;
1772}
1773
1774static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1775{
1776 int deleg_status, open_status;
1777 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1778 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1779
1780 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1781 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1782
1783 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1784 return NFS_OK;
f062eb6c
BS		 1785 return nfs4_open_expired(sp, state);
1786}
1787#endif
1788
aa53ed54
JL		 1789/*
1790 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1791 * fields corresponding to attributes that were used to store the verifier.
1792 * Make sure we clobber those fields in the later setattr call
1793 */
1794static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1795{
1796 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1797 !(sattr->ia_valid & ATTR_ATIME_SET))
1798 sattr->ia_valid |= ATTR_ATIME;
1799
1800 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1801 !(sattr->ia_valid & ATTR_MTIME_SET))
1802 sattr->ia_valid |= ATTR_MTIME;
1803}
1804
1da177e4 1805/*
24ac23ab 1806 * Returns a referenced nfs4_state
1da177e4 1807 */
82be417a
AA		 1808static int _nfs4_do_open(struct inode *dir,
1809 struct dentry *dentry,
1810 fmode_t fmode,
1811 int flags,
1812 struct iattr *sattr,
1813 struct rpc_cred *cred,
1814 struct nfs4_state **res,
1815 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1816{
1817 struct nfs4_state_owner *sp;
1818 struct nfs4_state *state = NULL;
1819 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1820 struct nfs4_opendata *opendata;
aac00a8d 1821 int status;
1da177e4
LT		 1822
1823 /* Protect against reboot recovery conflicts */
1da177e4 1824 status = -ENOMEM;
d1e284d5
TM		 1825 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1826 if (sp == NULL) {
1da177e4
LT		 1827 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1828 goto out_err;
1829 }
58d9714a
TM		 1830 status = nfs4_recover_expired_lease(server);
1831 if (status != 0)
b4454fe1 1832 goto err_put_state_owner;
82a2c1b7
AV		 1833 if (dentry->d_inode != NULL)
1834 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1835 status = -ENOMEM;
82a2c1b7 1836 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1837 if (opendata == NULL)
95d35cb4 1838 goto err_put_state_owner;
1da177e4 1839
82be417a
AA		 1840 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1841 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1842 if (!opendata->f_attr.mdsthreshold)
1843 goto err_opendata_put;
1549210f 1844 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1845 }
82a2c1b7
AV		 1846 if (dentry->d_inode != NULL)
1847 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1848
24ac23ab 1849 status = _nfs4_proc_open(opendata);
1da177e4 1850 if (status != 0)
c6d00e63 1851 goto err_opendata_put;
1da177e4 1852
24ac23ab 1853 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1854 status = PTR_ERR(state);
1855 if (IS_ERR(state))
c6d00e63 1856 goto err_opendata_put;
0df5dd4a 1857 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1858 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1859
1860 if (opendata->o_arg.open_flags & O_EXCL) {
1861 nfs4_exclusive_attrset(opendata, sattr);
1862
1863 nfs_fattr_init(opendata->o_res.f_attr);
1864 status = nfs4_do_setattr(state->inode, cred,
1865 opendata->o_res.f_attr, sattr,
1866 state);
1867 if (status == 0)
1868 nfs_setattr_update_inode(state->inode, sattr);
1869 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1870 }
82be417a
AA		 1871
1872 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1873 *ctx_th = opendata->f_attr.mdsthreshold;
1874 else
1875 kfree(opendata->f_attr.mdsthreshold);
1876 opendata->f_attr.mdsthreshold = NULL;
1877
c6d00e63 1878 nfs4_opendata_put(opendata);
1da177e4 1879 nfs4_put_state_owner(sp);
1da177e4
LT		 1880 *res = state;
1881 return 0;
c6d00e63 1882err_opendata_put:
82be417a 1883 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1884 nfs4_opendata_put(opendata);
e56e0b78
TM		 1885err_put_state_owner:
1886 nfs4_put_state_owner(sp);
1da177e4 1887out_err:
1da177e4
LT		 1888 *res = NULL;
1889 return status;
1890}
1891
1892
82be417a
AA		 1893static struct nfs4_state *nfs4_do_open(struct inode *dir,
1894 struct dentry *dentry,
1895 fmode_t fmode,
1896 int flags,
1897 struct iattr *sattr,
1898 struct rpc_cred *cred,
1899 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1900{
1901 struct nfs4_exception exception = { };
1902 struct nfs4_state *res;
1903 int status;
1904
2d0dbc6a 1905 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1906 do {
82be417a
AA		 1907 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1908 &res, ctx_th);
1da177e4
LT		 1909 if (status == 0)
1910 break;
1911 /* NOTE: BAD_SEQID means the server and client disagree about the
1912 * book-keeping w.r.t. state-changing operations
1913 * (OPEN/CLOSE/LOCK/LOCKU...)
1914 * It is actually a sign of a bug on the client or on the server.
1915 *
1916 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1917 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1918 * have unhashed the old state_owner for us, and that we can
1919 * therefore safely retry using a new one. We should still warn
1920 * the user though...
1921 */
1922 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1923 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1924 " returned a bad sequence-id error!\n",
1925 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1926 exception.retry = 1;
1927 continue;
1928 }
550f5747
TM		 1929 /*
1930 * BAD_STATEID on OPEN means that the server cancelled our
1931 * state before it received the OPEN_CONFIRM.
1932 * Recover by retrying the request as per the discussion
1933 * on Page 181 of RFC3530.
1934 */
1935 if (status == -NFS4ERR_BAD_STATEID) {
1936 exception.retry = 1;
1937 continue;
1938 }
aac00a8d
TM		 1939 if (status == -EAGAIN) {
1940 /* We must have found a delegation */
1941 exception.retry = 1;
1942 continue;
1943 }
1da177e4
LT		 1944 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1945 status, &exception));
1946 } while (exception.retry);
1947 return res;
1948}
1949
659bfcd6
TM		 1950static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1951 struct nfs_fattr *fattr, struct iattr *sattr,
1952 struct nfs4_state *state)
1da177e4 1953{
3e4f6290 1954 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1955 struct nfs_setattrargs arg = {
3e4f6290 1956 .fh = NFS_FH(inode),
1da177e4
LT		 1957 .iap = sattr,
1958 .server = server,
1959 .bitmask = server->attr_bitmask,
1960 };
1961 struct nfs_setattrres res = {
1962 .fattr = fattr,
1963 .server = server,
1964 };
1965 struct rpc_message msg = {
659bfcd6
TM		 1966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1967 .rpc_argp = &arg,
1968 .rpc_resp = &res,
1969 .rpc_cred = cred,
1da177e4 1970 };
26e976a8 1971 unsigned long timestamp = jiffies;
65e4308d 1972 int status;
1da177e4 1973
0e574af1 1974 nfs_fattr_init(fattr);
1da177e4 1975
4fc8796d
TM		 1976 if (state != NULL) {
1977 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1978 current->files, current->tgid);
1979 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1980 FMODE_WRITE)) {
3e4f6290 1981 /* Use that stateid */
08e9eac4 1982 } else
f597c537 1983 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1984
7c513058 1985 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1986 if (status == 0 && state != NULL)
1987 renew_lease(server, timestamp);
65e4308d 1988 return status;
1da177e4
LT		 1989}
1990
659bfcd6
TM		 1991static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1992 struct nfs_fattr *fattr, struct iattr *sattr,
1993 struct nfs4_state *state)
1da177e4 1994{
3e4f6290 1995 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1996 struct nfs4_exception exception = {
1997 .state = state,
3114ea7a 1998 .inode = inode,
a1d0b5ee 1999 };
1da177e4
LT		 2000 int err;
2001 do {
451146be
TM		 2002 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2003 switch (err) {
2004 case -NFS4ERR_OPENMODE:
2005 if (state && !(state->state & FMODE_WRITE)) {
2006 err = -EBADF;
2007 if (sattr->ia_valid & ATTR_OPEN)
2008 err = -EACCES;
2009 goto out;
2010 }
2011 }
2012 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2013 } while (exception.retry);
451146be 2014out:
1da177e4
LT		 2015 return err;
2016}
2017
2018struct nfs4_closedata {
2019 struct inode *inode;
2020 struct nfs4_state *state;
2021 struct nfs_closeargs arg;
2022 struct nfs_closeres res;
516a6af6 2023 struct nfs_fattr fattr;
26e976a8 2024 unsigned long timestamp;
f7e8917a
FI		 2025 bool roc;
2026 u32 roc_barrier;
1da177e4
LT		 2027};
2028
963d8fe5 2029static void nfs4_free_closedata(void *data)
9512135d 2030{
963d8fe5
TM		 2031 struct nfs4_closedata *calldata = data;
2032 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2033 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2034
f7e8917a
FI		 2035 if (calldata->roc)
2036 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2037 nfs4_put_open_state(calldata->state);
2038 nfs_free_seqid(calldata->arg.seqid);
9512135d 2039 nfs4_put_state_owner(sp);
643168c2 2040 nfs_sb_deactive(sb);
9512135d
TM		 2041 kfree(calldata);
2042}
2043
88069f77
TM		 2044static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2045 fmode_t fmode)
2046{
2047 spin_lock(&state->owner->so_lock);
2048 if (!(fmode & FMODE_READ))
2049 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2050 if (!(fmode & FMODE_WRITE))
2051 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2052 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2053 spin_unlock(&state->owner->so_lock);
2054}
2055
963d8fe5 2056static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2057{
963d8fe5 2058 struct nfs4_closedata *calldata = data;
1da177e4 2059 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2060 struct nfs_server *server = NFS_SERVER(calldata->inode);
2061
a3ca5651 2062 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2063 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2064 return;
1da177e4
LT		 2065 /* hmm. we are done with the inode, and in the process of freeing
2066 * the state_owner. we keep this around to process errors
2067 */
1da177e4
LT		 2068 switch (task->tk_status) {
2069 case 0:
f7e8917a
FI		 2070 if (calldata->roc)
2071 pnfs_roc_set_barrier(state->inode,
2072 calldata->roc_barrier);
45328c35 2073 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2074 renew_lease(server, calldata->timestamp);
88069f77
TM		 2075 nfs4_close_clear_stateid_flags(state,
2076 calldata->arg.fmode);
1da177e4
LT		 2077 break;
2078 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2079 case -NFS4ERR_OLD_STATEID:
2080 case -NFS4ERR_BAD_STATEID:
1da177e4 2081 case -NFS4ERR_EXPIRED:
dc0b027d 2082 if (calldata->arg.fmode == 0)
9e33bed5 2083 break;
1da177e4 2084 default:
72211dbe
TM		 2085 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2086 rpc_restart_call_prepare(task);
1da177e4 2087 }
72211dbe 2088 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2089 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2090 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2091}
2092
4ce70ada 2093static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2094{
4ce70ada 2095 struct nfs4_closedata *calldata = data;
9512135d 2096 struct nfs4_state *state = calldata->state;
88069f77 2097 int call_close = 0;
9512135d 2098
a3ca5651 2099 dprintk("%s: begin!\n", __func__);
963d8fe5 2100 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2101 return;
003707c7 2102
88069f77
TM		 2103 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2104 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2105 spin_lock(&state->owner->so_lock);
003707c7 2106 /* Calculate the change in open mode */
e7616923 2107 if (state->n_rdwr == 0) {
003707c7 2108 if (state->n_rdonly == 0) {
88069f77
TM		 2109 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2110 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2111 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2112 }
2113 if (state->n_wronly == 0) {
88069f77
TM		 2114 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2115 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2116 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2117 }
e7616923 2118 }
4cecb76f 2119 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2120
2121 if (!call_close) {
963d8fe5
TM		 2122 /* Note: exit _without_ calling nfs4_close_done */
2123 task->tk_action = NULL;
a3ca5651 2124 goto out;
9512135d 2125 }
88069f77 2126
f7e8917a 2127 if (calldata->arg.fmode == 0) {
88069f77 2128 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2129 if (calldata->roc &&
2130 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2131 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2132 task, NULL);
a3ca5651 2133 goto out;
f7e8917a
FI		 2134 }
2135 }
88069f77 2136
516a6af6 2137 nfs_fattr_init(calldata->res.fattr);
26e976a8 2138 calldata->timestamp = jiffies;
035168ab 2139 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2140 &calldata->arg.seq_args,
2141 &calldata->res.seq_res,
2142 task))
a3ca5651 2143 goto out;
5138fde0 2144 rpc_call_start(task);
a3ca5651
CL		 2145out:
2146 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2147}
2148
963d8fe5 2149static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2150 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2151 .rpc_call_done = nfs4_close_done,
2152 .rpc_release = nfs4_free_closedata,
2153};
2154
1da177e4
LT		 2155/*
2156 * It is possible for data to be read/written from a mem-mapped file
2157 * after the sys_close call (which hits the vfs layer as a flush).
2158 * This means that we can't safely call nfsv4 close on a file until
2159 * the inode is cleared. This in turn means that we are not good
2160 * NFSv4 citizens - we do not indicate to the server to update the file's
2161 * share state even when we are done with one of the three share
2162 * stateid's in the inode.
2163 *
2164 * NOTE: Caller must be holding the sp->so_owner semaphore!
2165 */
643168c2 2166int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2167{
4a35bd41 2168 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2169 struct nfs4_closedata *calldata;
b39e625b
TM		 2170 struct nfs4_state_owner *sp = state->owner;
2171 struct rpc_task *task;
5138fde0
TM		 2172 struct rpc_message msg = {
2173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2174 .rpc_cred = state->owner->so_cred,
2175 };
c970aa85
TM		 2176 struct rpc_task_setup task_setup_data = {
2177 .rpc_client = server->client,
5138fde0 2178 .rpc_message = &msg,
c970aa85 2179 .callback_ops = &nfs4_close_ops,
101070ca 2180 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2181 .flags = RPC_TASK_ASYNC,
2182 };
9512135d 2183 int status = -ENOMEM;
1da177e4 2184
8535b2be 2185 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2186 if (calldata == NULL)
9512135d 2187 goto out;
9d12b216 2188 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2189 calldata->inode = state->inode;
1da177e4 2190 calldata->state = state;
4a35bd41 2191 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2192 calldata->arg.stateid = &state->open_stateid;
1da177e4 2193 /* Serialization for the sequence id */
8535b2be 2194 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2195 if (calldata->arg.seqid == NULL)
2196 goto out_free_calldata;
dc0b027d 2197 calldata->arg.fmode = 0;
a65318bf 2198 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2199 calldata->res.fattr = &calldata->fattr;
c1d51931 2200 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2201 calldata->res.server = server;
f7e8917a 2202 calldata->roc = roc;
643168c2 2203 nfs_sb_active(calldata->inode->i_sb);
9512135d 2204
1174dd1f
TM		 2205 msg.rpc_argp = &calldata->arg;
2206 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2207 task_setup_data.callback_data = calldata;
2208 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2209 if (IS_ERR(task))
2210 return PTR_ERR(task);
a49c3c77
TM		 2211 status = 0;
2212 if (wait)
2213 status = rpc_wait_for_completion_task(task);
b39e625b 2214 rpc_put_task(task);
a49c3c77 2215 return status;
9512135d
TM		 2216out_free_calldata:
2217 kfree(calldata);
2218out:
f7e8917a
FI		 2219 if (roc)
2220 pnfs_roc_release(state->inode);
b39e625b
TM		 2221 nfs4_put_open_state(state);
2222 nfs4_put_state_owner(sp);
9512135d 2223 return status;
1da177e4
LT		 2224}
2225
2b484297 2226static struct inode *
cd9a1c0e 2227nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2228{
1da177e4 2229 struct nfs4_state *state;
1da177e4 2230
565277f6 2231 /* Protect against concurrent sillydeletes */
82be417a
AA		 2232 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2233 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2234 if (IS_ERR(state))
2235 return ERR_CAST(state);
cd9a1c0e 2236 ctx->state = state;
f46e0bd3 2237 return igrab(state->inode);
1da177e4
LT		 2238}
2239
1185a552 2240static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2241{
2242 if (ctx->state == NULL)
2243 return;
2244 if (is_sync)
643168c2 2245 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2246 else
643168c2 2247 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2248}
1da177e4
LT		 2249
2250static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2251{
43652ad5
BH		 2252 struct nfs4_server_caps_arg args = {
2253 .fhandle = fhandle,
2254 };
1da177e4
LT		 2255 struct nfs4_server_caps_res res = {};
2256 struct rpc_message msg = {
2257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2258 .rpc_argp = &args,
1da177e4
LT		 2259 .rpc_resp = &res,
2260 };
2261 int status;
2262
7c513058 2263 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2264 if (status == 0) {
2265 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2266 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2267 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2268 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2269 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2270 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2271 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2272 server->caps |= NFS_CAP_ACLS;
2273 if (res.has_links != 0)
2274 server->caps |= NFS_CAP_HARDLINKS;
2275 if (res.has_symlinks != 0)
2276 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2277 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2278 server->caps |= NFS_CAP_FILEID;
2279 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2280 server->caps |= NFS_CAP_MODE;
2281 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2282 server->caps |= NFS_CAP_NLINK;
2283 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2284 server->caps |= NFS_CAP_OWNER;
2285 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2286 server->caps |= NFS_CAP_OWNER_GROUP;
2287 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2288 server->caps |= NFS_CAP_ATIME;
2289 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2290 server->caps |= NFS_CAP_CTIME;
2291 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2292 server->caps |= NFS_CAP_MTIME;
2293
a65318bf
TM		 2294 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2295 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2296 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2297 server->acl_bitmask = res.acl_bitmask;
264e6351 2298 server->fh_expire_type = res.fh_expire_type;
1da177e4 2299 }
cccef3b9 2300
1da177e4
LT		 2301 return status;
2302}
2303
55a97593 2304int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2305{
2306 struct nfs4_exception exception = { };
2307 int err;
2308 do {
2309 err = nfs4_handle_exception(server,
2310 _nfs4_server_capabilities(server, fhandle),
2311 &exception);
2312 } while (exception.retry);
2313 return err;
2314}
2315
2316static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsinfo *info)
2318{
1da177e4
LT		 2319 struct nfs4_lookup_root_arg args = {
2320 .bitmask = nfs4_fattr_bitmap,
2321 };
2322 struct nfs4_lookup_res res = {
2323 .server = server,
0e574af1 2324 .fattr = info->fattr,
1da177e4
LT		 2325 .fh = fhandle,
2326 };
2327 struct rpc_message msg = {
2328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2329 .rpc_argp = &args,
2330 .rpc_resp = &res,
2331 };
008f55d0 2332
0e574af1 2333 nfs_fattr_init(info->fattr);
7c513058 2334 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2335}
2336
2337static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2338 struct nfs_fsinfo *info)
2339{
2340 struct nfs4_exception exception = { };
2341 int err;
2342 do {
fb8a5ba8
BS		 2343 err = _nfs4_lookup_root(server, fhandle, info);
2344 switch (err) {
2345 case 0:
2346 case -NFS4ERR_WRONGSEC:
05e9cfb4 2347 goto out;
fb8a5ba8
BS		 2348 default:
2349 err = nfs4_handle_exception(server, err, &exception);
2350 }
1da177e4 2351 } while (exception.retry);
05e9cfb4 2352out:
1da177e4
LT		 2353 return err;
2354}
2355
8f70e95f
BS		 2356static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2357 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2358{
2359 struct rpc_auth *auth;
2360 int ret;
2361
2362 auth = rpcauth_create(flavor, server->client);
2363 if (!auth) {
2364 ret = -EIO;
2365 goto out;
2366 }
2367 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2368out:
2369 return ret;
2370}
2371
801a16dc 2372static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2373 struct nfs_fsinfo *info)
1da177e4 2374{
8f70e95f 2375 int i, len, status = 0;
0fabee24 2376 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2377
801a16dc
BS		 2378 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2379 flav_array[len] = RPC_AUTH_NULL;
2380 len += 1;
8f70e95f
BS		 2381
2382 for (i = 0; i < len; i++) {
2383 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2384 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2385 continue;
2386 break;
8f70e95f 2387 }
fb8a5ba8
BS		 2388 /*
2389 * -EACCESS could mean that the user doesn't have correct permissions
2390 * to access the mount. It could also mean that we tried to mount
2391 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2392 * existing mount programs don't handle -EACCES very well so it should
2393 * be mapped to -EPERM instead.
2394 */
2395 if (status == -EACCES)
2396 status = -EPERM;
801a16dc
BS		 2397 return status;
2398}
2399
2400/*
2401 * get the file handle for the "/" directory on the server
2402 */
3028eb2b
BS		 2403int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_fsinfo *info)
801a16dc 2405{
fca78d6d 2406 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2407 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2408 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2409 /*
2410 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2411 * by nfs4_map_errors() as this function exits.
2412 */
fca78d6d 2413 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2414 if (status == 0)
2415 status = nfs4_server_capabilities(server, fhandle);
2416 if (status == 0)
2417 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2418 return nfs4_map_errors(status);
1da177e4
LT		 2419}
2420
bae36241
BS		 2421static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2422 struct nfs_fsinfo *info)
2423{
2424 int error;
2425 struct nfs_fattr *fattr = info->fattr;
2426
2427 error = nfs4_server_capabilities(server, mntfh);
2428 if (error < 0) {
2429 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2430 return error;
2431 }
2432
2433 error = nfs4_proc_getattr(server, mntfh, fattr);
2434 if (error < 0) {
2435 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2436 return error;
2437 }
2438
2439 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2440 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2441 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2442
2443 return error;
2444}
2445
6b97fd3d
MN		 2446/*
2447 * Get locations and (maybe) other attributes of a referral.
2448 * Note that we'll actually follow the referral later when
2449 * we detect fsid mismatch in inode revalidation
2450 */
f05d147f
BS		 2451static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2452 const struct qstr *name, struct nfs_fattr *fattr,
2453 struct nfs_fh *fhandle)
6b97fd3d
MN		 2454{
2455 int status = -ENOMEM;
2456 struct page *page = NULL;
2457 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2458
2459 page = alloc_page(GFP_KERNEL);
2460 if (page == NULL)
2461 goto out;
2462 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2463 if (locations == NULL)
2464 goto out;
2465
f05d147f 2466 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2467 if (status != 0)
2468 goto out;
2469 /* Make sure server returned a different fsid for the referral */
2470 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2471 dprintk("%s: server did not return a different fsid for"
2472 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2473 status = -EIO;
2474 goto out;
2475 }
533eb461
AA		 2476 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2477 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2478
533eb461 2479 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2480 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2481 memset(fhandle, 0, sizeof(struct nfs_fh));
2482out:
2483 if (page)
2484 __free_page(page);
5d7ca35a 2485 kfree(locations);
6b97fd3d
MN		 2486 return status;
2487}
2488
1da177e4
LT		 2489static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2490{
2491 struct nfs4_getattr_arg args = {
2492 .fh = fhandle,
2493 .bitmask = server->attr_bitmask,
2494 };
2495 struct nfs4_getattr_res res = {
2496 .fattr = fattr,
2497 .server = server,
2498 };
2499 struct rpc_message msg = {
2500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2501 .rpc_argp = &args,
2502 .rpc_resp = &res,
2503 };
2504
0e574af1 2505 nfs_fattr_init(fattr);
7c513058 2506 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2507}
2508
2509static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2510{
2511 struct nfs4_exception exception = { };
2512 int err;
2513 do {
2514 err = nfs4_handle_exception(server,
2515 _nfs4_proc_getattr(server, fhandle, fattr),
2516 &exception);
2517 } while (exception.retry);
2518 return err;
2519}
2520
2521/*
2522 * The file is not closed if it is opened due to the a request to change
2523 * the size of the file. The open call will not be needed once the
2524 * VFS layer lookup-intents are implemented.
2525 *
2526 * Close is called when the inode is destroyed.
2527 * If we haven't opened the file for O_WRONLY, we
2528 * need to in the size_change case to obtain a stateid.
2529 *
2530 * Got race?
2531 * Because OPEN is always done by name in nfsv4, it is
2532 * possible that we opened a different file by the same
2533 * name. We can recognize this race condition, but we
2534 * can't do anything about it besides returning an error.
2535 *
2536 * This will be fixed with VFS changes (lookup-intent).
2537 */
2538static int
2539nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2540 struct iattr *sattr)
2541{
08e9eac4 2542 struct inode *inode = dentry->d_inode;
659bfcd6 2543 struct rpc_cred *cred = NULL;
d530838b 2544 struct nfs4_state *state = NULL;
1da177e4
LT		 2545 int status;
2546
8a1636c4
BH		 2547 if (pnfs_ld_layoutret_on_setattr(inode))
2548 pnfs_return_layout(inode);
2549
0e574af1 2550 nfs_fattr_init(fattr);
1da177e4 2551
2669940d
AA		 2552 /* Deal with open(O_TRUNC) */
2553 if (sattr->ia_valid & ATTR_OPEN)
2554 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2555
2556 /* Optimization: if the end result is no change, don't RPC */
2557 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2558 return 0;
2559
d530838b 2560 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2561 if (sattr->ia_valid & ATTR_FILE) {
2562 struct nfs_open_context *ctx;
2563
2564 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2565 if (ctx) {
2566 cred = ctx->cred;
2567 state = ctx->state;
2568 }
659bfcd6 2569 }
08e9eac4 2570
659bfcd6 2571 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2572 if (status == 0)
2573 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2574 return status;
2575}
2576
0c2e53f1
TM		 2577static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2578 const struct qstr *name, struct nfs_fh *fhandle,
2579 struct nfs_fattr *fattr)
2b3de441 2580{
0c2e53f1 2581 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2582 int status;
2583 struct nfs4_lookup_arg args = {
2584 .bitmask = server->attr_bitmask,
0c2e53f1 2585 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2586 .name = name,
2587 };
2588 struct nfs4_lookup_res res = {
2589 .server = server,
2590 .fattr = fattr,
2591 .fh = fhandle,
2592 };
2593 struct rpc_message msg = {
2594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2595 .rpc_argp = &args,
2596 .rpc_resp = &res,
2597 };
2598
2599 nfs_fattr_init(fattr);
2600
1da177e4 2601 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2602 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2603 dprintk("NFS reply lookup: %d\n", status);
2604 return status;
2605}
2606
72de53ec 2607static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2608{
7ebb9315 2609 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2610 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2611 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2612 fattr->nlink = 2;
2613}
2614
72de53ec
BS		 2615static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2616 struct qstr *name, struct nfs_fh *fhandle,
2617 struct nfs_fattr *fattr)
1da177e4
LT		 2618{
2619 struct nfs4_exception exception = { };
72de53ec 2620 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2621 int err;
2622 do {
72de53ec
BS		 2623 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2624 switch (err) {
08ef7bd3 2625 case -NFS4ERR_BADNAME:
72de53ec
BS		 2626 err = -ENOENT;
2627 goto out;
0c2e53f1 2628 case -NFS4ERR_MOVED:
f05d147f 2629 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2630 goto out;
0c2e53f1 2631 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2632 err = -EPERM;
2633 if (client != *clnt)
2634 goto out;
2635
2636 client = nfs4_create_sec_client(client, dir, name);
2637 if (IS_ERR(client))
2638 return PTR_ERR(client);
2639
2640 exception.retry = 1;
2641 break;
2642 default:
2643 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2644 }
1da177e4 2645 } while (exception.retry);
72de53ec
BS		 2646
2647out:
2648 if (err == 0)
2649 *clnt = client;
2650 else if (client != *clnt)
2651 rpc_shutdown_client(client);
2652
1da177e4
LT		 2653 return err;
2654}
2655
80a16b21 2656static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2657 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2658{
2659 int status;
2660 struct rpc_clnt *client = NFS_CLIENT(dir);
2661
2662 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2663 if (client != NFS_CLIENT(dir)) {
2664 rpc_shutdown_client(client);
2665 nfs_fixup_secinfo_attributes(fattr);
2666 }
2667 return status;
2668}
2669
f05d147f
BS		 2670struct rpc_clnt *
2671nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2672 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2673{
2674 int status;
2675 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2676
2677 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2678 if (status < 0) {
2679 rpc_shutdown_client(client);
2680 return ERR_PTR(status);
2681 }
2682 return client;
2683}
2684
1da177e4
LT		 2685static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2686{
76b32999 2687 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2688 struct nfs4_accessargs args = {
2689 .fh = NFS_FH(inode),
a4980e78 2690 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2691 };
2692 struct nfs4_accessres res = {
2693 .server = server,
1da177e4 2694 };
1da177e4
LT		 2695 struct rpc_message msg = {
2696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2697 .rpc_argp = &args,
2698 .rpc_resp = &res,
2699 .rpc_cred = entry->cred,
2700 };
2701 int mode = entry->mask;
2702 int status;
2703
2704 /*
2705 * Determine which access bits we want to ask for...
2706 */
2707 if (mode & MAY_READ)
2708 args.access |= NFS4_ACCESS_READ;
2709 if (S_ISDIR(inode->i_mode)) {
2710 if (mode & MAY_WRITE)
2711 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2712 if (mode & MAY_EXEC)
2713 args.access |= NFS4_ACCESS_LOOKUP;
2714 } else {
2715 if (mode & MAY_WRITE)
2716 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2717 if (mode & MAY_EXEC)
2718 args.access |= NFS4_ACCESS_EXECUTE;
2719 }
c407d41a
TM		 2720
2721 res.fattr = nfs_alloc_fattr();
2722 if (res.fattr == NULL)
2723 return -ENOMEM;
2724
7c513058 2725 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2726 if (!status) {
2727 entry->mask = 0;
2728 if (res.access & NFS4_ACCESS_READ)
2729 entry->mask |= MAY_READ;
2730 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2731 entry->mask |= MAY_WRITE;
2732 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2733 entry->mask |= MAY_EXEC;
c407d41a 2734 nfs_refresh_inode(inode, res.fattr);
1da177e4 2735 }
c407d41a 2736 nfs_free_fattr(res.fattr);
1da177e4
LT		 2737 return status;
2738}
2739
2740static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2741{
2742 struct nfs4_exception exception = { };
2743 int err;
2744 do {
2745 err = nfs4_handle_exception(NFS_SERVER(inode),
2746 _nfs4_proc_access(inode, entry),
2747 &exception);
2748 } while (exception.retry);
2749 return err;
2750}
2751
2752/*
2753 * TODO: For the time being, we don't try to get any attributes
2754 * along with any of the zero-copy operations READ, READDIR,
2755 * READLINK, WRITE.
2756 *
2757 * In the case of the first three, we want to put the GETATTR
2758 * after the read-type operation -- this is because it is hard
2759 * to predict the length of a GETATTR response in v4, and thus
2760 * align the READ data correctly. This means that the GETATTR
2761 * may end up partially falling into the page cache, and we should
2762 * shift it into the 'tail' of the xdr_buf before processing.
2763 * To do this efficiently, we need to know the total length
2764 * of data received, which doesn't seem to be available outside
2765 * of the RPC layer.
2766 *
2767 * In the case of WRITE, we also want to put the GETATTR after
2768 * the operation -- in this case because we want to make sure
140150db 2769 * we get the post-operation mtime and size.
1da177e4
LT		 2770 *
2771 * Both of these changes to the XDR layer would in fact be quite
2772 * minor, but I decided to leave them for a subsequent patch.
2773 */
2774static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2775 unsigned int pgbase, unsigned int pglen)
2776{
2777 struct nfs4_readlink args = {
2778 .fh = NFS_FH(inode),
2779 .pgbase = pgbase,
2780 .pglen = pglen,
2781 .pages = &page,
2782 };
f50c7000 2783 struct nfs4_readlink_res res;
1da177e4
LT		 2784 struct rpc_message msg = {
2785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2786 .rpc_argp = &args,
f50c7000 2787 .rpc_resp = &res,
1da177e4
LT		 2788 };
2789
7c513058 2790 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2791}
2792
2793static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2794 unsigned int pgbase, unsigned int pglen)
2795{
2796 struct nfs4_exception exception = { };
2797 int err;
2798 do {
2799 err = nfs4_handle_exception(NFS_SERVER(inode),
2800 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2801 &exception);
2802 } while (exception.retry);
2803 return err;
2804}
2805
1da177e4 2806/*
8867fe58 2807 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2808 */
1da177e4
LT		 2809static int
2810nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2811 int flags)
1da177e4 2812{
8867fe58 2813 struct nfs_open_context *ctx;
1da177e4 2814 struct nfs4_state *state;
1da177e4
LT		 2815 int status = 0;
2816
8867fe58
MS		 2817 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2818 if (IS_ERR(ctx))
2819 return PTR_ERR(ctx);
2820
a8a5da99 2821 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2822 state = nfs4_do_open(dir, dentry, ctx->mode,
2823 flags, sattr, ctx->cred,
2824 &ctx->mdsthreshold);
d4d9cdcb 2825 d_drop(dentry);
1da177e4
LT		 2826 if (IS_ERR(state)) {
2827 status = PTR_ERR(state);
c0204fd2 2828 goto out;
1da177e4 2829 }
d4d9cdcb 2830 d_add(dentry, igrab(state->inode));
d75340cc 2831 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2832 ctx->state = state;
1da177e4 2833out:
8867fe58 2834 put_nfs_open_context(ctx);
1da177e4
LT		 2835 return status;
2836}
2837
2838static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2839{
16e42959 2840 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2841 struct nfs_removeargs args = {
1da177e4 2842 .fh = NFS_FH(dir),
26fe5750 2843 .name = *name,
16e42959 2844 };
4fdc17b2 2845 struct nfs_removeres res = {
16e42959 2846 .server = server,
1da177e4 2847 };
1da177e4 2848 struct rpc_message msg = {
4fdc17b2
TM		 2849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2850 .rpc_argp = &args,
2851 .rpc_resp = &res,
1da177e4 2852 };
778d2817 2853 int status;
1da177e4 2854
7c513058 2855 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2856 if (status == 0)
16e42959 2857 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2858 return status;
2859}
2860
2861static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2862{
2863 struct nfs4_exception exception = { };
2864 int err;
2865 do {
2866 err = nfs4_handle_exception(NFS_SERVER(dir),
2867 _nfs4_proc_remove(dir, name),
2868 &exception);
2869 } while (exception.retry);
2870 return err;
2871}
2872
e4eff1a6 2873static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2874{
e4eff1a6
TM		 2875 struct nfs_server *server = NFS_SERVER(dir);
2876 struct nfs_removeargs *args = msg->rpc_argp;
2877 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2878
e4eff1a6 2879 res->server = server;
1da177e4 2880 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2881 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2882}
2883
34e137cc
BS		 2884static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2885{
2886 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2887 &data->args.seq_args,
2888 &data->res.seq_res,
2889 task))
2890 return;
2891 rpc_call_start(task);
1da177e4
LT		 2892}
2893
e4eff1a6 2894static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2895{
e4eff1a6
TM		 2896 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2897
14516c3a
TM		 2898 if (!nfs4_sequence_done(task, &res->seq_res))
2899 return 0;
9e33bed5 2900 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2901 return 0;
2902 update_changeattr(dir, &res->cinfo);
e4eff1a6 2903 return 1;
1da177e4
LT		 2904}
2905
d3d4152a
JL		 2906static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2907{
2908 struct nfs_server *server = NFS_SERVER(dir);
2909 struct nfs_renameargs *arg = msg->rpc_argp;
2910 struct nfs_renameres *res = msg->rpc_resp;
2911
2912 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2913 res->server = server;
9d12b216 2914 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2915}
2916
c6bfa1a1
BS		 2917static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2918{
2919 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2920 &data->args.seq_args,
2921 &data->res.seq_res,
2922 task))
2923 return;
2924 rpc_call_start(task);
d3d4152a
JL		 2925}
2926
2927static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2928 struct inode *new_dir)
2929{
2930 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2931
2932 if (!nfs4_sequence_done(task, &res->seq_res))
2933 return 0;
2934 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2935 return 0;
2936
2937 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2938 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2939 return 1;
2940}
2941
1da177e4
LT		 2942static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2943 struct inode *new_dir, struct qstr *new_name)
2944{
6caf2c82 2945 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2946 struct nfs_renameargs arg = {
1da177e4
LT		 2947 .old_dir = NFS_FH(old_dir),
2948 .new_dir = NFS_FH(new_dir),
2949 .old_name = old_name,
2950 .new_name = new_name,
6caf2c82 2951 };
e8582a8b 2952 struct nfs_renameres res = {
6caf2c82 2953 .server = server,
1da177e4 2954 };
1da177e4
LT		 2955 struct rpc_message msg = {
2956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2957 .rpc_argp = &arg,
2958 .rpc_resp = &res,
2959 };
011fff72 2960 int status = -ENOMEM;
1da177e4 2961
7c513058 2962 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2963 if (!status) {
2964 update_changeattr(old_dir, &res.old_cinfo);
2965 update_changeattr(new_dir, &res.new_cinfo);
2966 }
2967 return status;
2968}
2969
2970static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2971 struct inode *new_dir, struct qstr *new_name)
2972{
2973 struct nfs4_exception exception = { };
2974 int err;
2975 do {
2976 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2977 _nfs4_proc_rename(old_dir, old_name,
2978 new_dir, new_name),
2979 &exception);
2980 } while (exception.retry);
2981 return err;
2982}
2983
2984static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2985{
91ba2eee 2986 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2987 struct nfs4_link_arg arg = {
2988 .fh = NFS_FH(inode),
2989 .dir_fh = NFS_FH(dir),
2990 .name = name,
91ba2eee
TM		 2991 .bitmask = server->attr_bitmask,
2992 };
91ba2eee
TM		 2993 struct nfs4_link_res res = {
2994 .server = server,
1da177e4 2995 };
1da177e4
LT		 2996 struct rpc_message msg = {
2997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2998 .rpc_argp = &arg,
91ba2eee 2999 .rpc_resp = &res,
1da177e4 3000 };
136f2627
TM		 3001 int status = -ENOMEM;
3002
3003 res.fattr = nfs_alloc_fattr();
778d2817 3004 if (res.fattr == NULL)
136f2627 3005 goto out;
1da177e4 3006
7c513058 3007 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3008 if (!status) {
3009 update_changeattr(dir, &res.cinfo);
73a3d07c 3010 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3011 }
136f2627 3012out:
136f2627 3013 nfs_free_fattr(res.fattr);
1da177e4
LT		 3014 return status;
3015}
3016
3017static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3018{
3019 struct nfs4_exception exception = { };
3020 int err;
3021 do {
3022 err = nfs4_handle_exception(NFS_SERVER(inode),
3023 _nfs4_proc_link(inode, dir, name),
3024 &exception);
3025 } while (exception.retry);
3026 return err;
3027}
3028
57dc9a57
TM		 3029struct nfs4_createdata {
3030 struct rpc_message msg;
3031 struct nfs4_create_arg arg;
3032 struct nfs4_create_res res;
3033 struct nfs_fh fh;
3034 struct nfs_fattr fattr;
57dc9a57
TM		 3035};
3036
3037static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3038 struct qstr *name, struct iattr *sattr, u32 ftype)
3039{
3040 struct nfs4_createdata *data;
3041
3042 data = kzalloc(sizeof(*data), GFP_KERNEL);
3043 if (data != NULL) {
3044 struct nfs_server *server = NFS_SERVER(dir);
3045
3046 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3047 data->msg.rpc_argp = &data->arg;
3048 data->msg.rpc_resp = &data->res;
3049 data->arg.dir_fh = NFS_FH(dir);
3050 data->arg.server = server;
3051 data->arg.name = name;
3052 data->arg.attrs = sattr;
3053 data->arg.ftype = ftype;
3054 data->arg.bitmask = server->attr_bitmask;
3055 data->res.server = server;
3056 data->res.fh = &data->fh;
3057 data->res.fattr = &data->fattr;
57dc9a57 3058 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3059 }
3060 return data;
3061}
3062
3063static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3064{
7c513058 3065 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3066 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3067 if (status == 0) {
3068 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3069 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3070 }
3071 return status;
3072}
3073
3074static void nfs4_free_createdata(struct nfs4_createdata *data)
3075{
3076 kfree(data);
3077}
3078
4f390c15 3079static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3080 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3081{
57dc9a57
TM		 3082 struct nfs4_createdata *data;
3083 int status = -ENAMETOOLONG;
1da177e4 3084
94a6d753 3085 if (len > NFS4_MAXPATHLEN)
57dc9a57 3086 goto out;
4f390c15 3087
57dc9a57
TM		 3088 status = -ENOMEM;
3089 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3090 if (data == NULL)
3091 goto out;
3092
3093 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3094 data->arg.u.symlink.pages = &page;
3095 data->arg.u.symlink.len = len;
1da177e4 3096
57dc9a57
TM		 3097 status = nfs4_do_create(dir, dentry, data);
3098
3099 nfs4_free_createdata(data);
3100out:
1da177e4
LT		 3101 return status;
3102}
3103
4f390c15 3104static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3105 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3106{
3107 struct nfs4_exception exception = { };
3108 int err;
3109 do {
3110 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3111 _nfs4_proc_symlink(dir, dentry, page,
3112 len, sattr),
1da177e4
LT		 3113 &exception);
3114 } while (exception.retry);
3115 return err;
3116}
3117
3118static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3119 struct iattr *sattr)
3120{
57dc9a57
TM		 3121 struct nfs4_createdata *data;
3122 int status = -ENOMEM;
1da177e4 3123
57dc9a57
TM		 3124 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3125 if (data == NULL)
3126 goto out;
3127
3128 status = nfs4_do_create(dir, dentry, data);
3129
3130 nfs4_free_createdata(data);
3131out:
1da177e4
LT		 3132 return status;
3133}
3134
3135static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3136 struct iattr *sattr)
3137{
3138 struct nfs4_exception exception = { };
3139 int err;
a8a5da99
AK		 3140
3141 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3142 do {
3143 err = nfs4_handle_exception(NFS_SERVER(dir),
3144 _nfs4_proc_mkdir(dir, dentry, sattr),
3145 &exception);
3146 } while (exception.retry);
3147 return err;
3148}
3149
3150static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3151 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3152{
3153 struct inode *dir = dentry->d_inode;
3154 struct nfs4_readdir_arg args = {
3155 .fh = NFS_FH(dir),
56e4ebf8 3156 .pages = pages,
1da177e4
LT		 3157 .pgbase = 0,
3158 .count = count,
96d25e53 3159 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3160 .plus = plus,
1da177e4
LT		 3161 };
3162 struct nfs4_readdir_res res;
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3165 .rpc_argp = &args,
3166 .rpc_resp = &res,
3167 .rpc_cred = cred,
3168 };
3169 int status;
3170
3110ff80 3171 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3172 dentry->d_parent->d_name.name,
3173 dentry->d_name.name,
3174 (unsigned long long)cookie);
1da177e4
LT		 3175 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3176 res.pgbase = args.pgbase;
7c513058 3177 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3178 if (status >= 0) {
1da177e4 3179 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3180 status += args.pgbase;
3181 }
c4812998
TM		 3182
3183 nfs_invalidate_atime(dir);
3184
3110ff80 3185 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3186 return status;
3187}
3188
3189static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3190 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3191{
3192 struct nfs4_exception exception = { };
3193 int err;
3194 do {
3195 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3196 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3197 pages, count, plus),
1da177e4
LT		 3198 &exception);
3199 } while (exception.retry);
3200 return err;
3201}
3202
3203static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3204 struct iattr *sattr, dev_t rdev)
3205{
57dc9a57
TM		 3206 struct nfs4_createdata *data;
3207 int mode = sattr->ia_mode;
3208 int status = -ENOMEM;
1da177e4
LT		 3209
3210 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3211 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3212
3213 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3214 if (data == NULL)
3215 goto out;
3216
1da177e4 3217 if (S_ISFIFO(mode))
57dc9a57 3218 data->arg.ftype = NF4FIFO;
1da177e4 3219 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3220 data->arg.ftype = NF4BLK;
3221 data->arg.u.device.specdata1 = MAJOR(rdev);
3222 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3223 }
3224 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3225 data->arg.ftype = NF4CHR;
3226 data->arg.u.device.specdata1 = MAJOR(rdev);
3227 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3228 }
1da177e4 3229
57dc9a57
TM		 3230 status = nfs4_do_create(dir, dentry, data);
3231
3232 nfs4_free_createdata(data);
3233out:
1da177e4
LT		 3234 return status;
3235}
3236
3237static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3238 struct iattr *sattr, dev_t rdev)
3239{
3240 struct nfs4_exception exception = { };
3241 int err;
a8a5da99
AK		 3242
3243 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3244 do {
3245 err = nfs4_handle_exception(NFS_SERVER(dir),
3246 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3247 &exception);
3248 } while (exception.retry);
3249 return err;
3250}
3251
3252static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3253 struct nfs_fsstat *fsstat)
3254{
3255 struct nfs4_statfs_arg args = {
3256 .fh = fhandle,
3257 .bitmask = server->attr_bitmask,
3258 };
24ad148a
BH		 3259 struct nfs4_statfs_res res = {
3260 .fsstat = fsstat,
3261 };
1da177e4
LT		 3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3264 .rpc_argp = &args,
24ad148a 3265 .rpc_resp = &res,
1da177e4
LT		 3266 };
3267
0e574af1 3268 nfs_fattr_init(fsstat->fattr);
7c513058 3269 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3270}
3271
3272static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3273{
3274 struct nfs4_exception exception = { };
3275 int err;
3276 do {
3277 err = nfs4_handle_exception(server,
3278 _nfs4_proc_statfs(server, fhandle, fsstat),
3279 &exception);
3280 } while (exception.retry);
3281 return err;
3282}
3283
3284static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3285 struct nfs_fsinfo *fsinfo)
3286{
3287 struct nfs4_fsinfo_arg args = {
3288 .fh = fhandle,
3289 .bitmask = server->attr_bitmask,
3290 };
3dda5e43
BH		 3291 struct nfs4_fsinfo_res res = {
3292 .fsinfo = fsinfo,
3293 };
1da177e4
LT		 3294 struct rpc_message msg = {
3295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3296 .rpc_argp = &args,
3dda5e43 3297 .rpc_resp = &res,
1da177e4
LT		 3298 };
3299
7c513058 3300 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3301}
3302
3303static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3304{
3305 struct nfs4_exception exception = { };
3306 int err;
3307
3308 do {
3309 err = nfs4_handle_exception(server,
3310 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3311 &exception);
3312 } while (exception.retry);
3313 return err;
3314}
3315
3316static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3317{
e38eb650
BS		 3318 int error;
3319
0e574af1 3320 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3321 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3322 if (error == 0)
3323 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3324
3325 return error;
1da177e4
LT		 3326}
3327
3328static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3329 struct nfs_pathconf *pathconf)
3330{
3331 struct nfs4_pathconf_arg args = {
3332 .fh = fhandle,
3333 .bitmask = server->attr_bitmask,
3334 };
d45b2989
BH		 3335 struct nfs4_pathconf_res res = {
3336 .pathconf = pathconf,
3337 };
1da177e4
LT		 3338 struct rpc_message msg = {
3339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3340 .rpc_argp = &args,
d45b2989 3341 .rpc_resp = &res,
1da177e4
LT		 3342 };
3343
3344 /* None of the pathconf attributes are mandatory to implement */
3345 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3346 memset(pathconf, 0, sizeof(*pathconf));
3347 return 0;
3348 }
3349
0e574af1 3350 nfs_fattr_init(pathconf->fattr);
7c513058 3351 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3352}
3353
3354static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_pathconf *pathconf)
3356{
3357 struct nfs4_exception exception = { };
3358 int err;
3359
3360 do {
3361 err = nfs4_handle_exception(server,
3362 _nfs4_proc_pathconf(server, fhandle, pathconf),
3363 &exception);
3364 } while (exception.retry);
3365 return err;
3366}
3367
d20581aa
BH		 3368void __nfs4_read_done_cb(struct nfs_read_data *data)
3369{
cd841605 3370 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3371}
3372
cbdabc7f 3373static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3374{
cd841605 3375 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3376
9e33bed5 3377 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3378 rpc_restart_call_prepare(task);
ec06c096 3379 return -EAGAIN;
1da177e4 3380 }
8850df99 3381
d20581aa 3382 __nfs4_read_done_cb(data);
1da177e4 3383 if (task->tk_status > 0)
ec06c096
TM		 3384 renew_lease(server, data->timestamp);
3385 return 0;
1da177e4
LT		 3386}
3387
cbdabc7f
AA		 3388static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3389{
3390
3391 dprintk("--> %s\n", __func__);
3392
3393 if (!nfs4_sequence_done(task, &data->res.seq_res))
3394 return -EAGAIN;
3395
d20581aa
BH		 3396 return data->read_done_cb ? data->read_done_cb(task, data) :
3397 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3398}
3399
bdc7f021 3400static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3401{
1da177e4 3402 data->timestamp = jiffies;
cbdabc7f 3403 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3404 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3405 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3406}
3407
ea7c3303
BS		 3408static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3409{
cd841605 3410 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3411 &data->args.seq_args,
3412 &data->res.seq_res,
3413 task))
3414 return;
3415 rpc_call_start(task);
1da177e4
LT		 3416}
3417
b029bc9b 3418static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3419{
cd841605 3420 struct inode *inode = data->header->inode;
1da177e4 3421
9e33bed5 3422 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3423 rpc_restart_call_prepare(task);
788e7a89 3424 return -EAGAIN;
1da177e4 3425 }
4f9838c7 3426 if (task->tk_status >= 0) {
1da177e4 3427 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3428 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3429 }
788e7a89 3430 return 0;
1da177e4
LT		 3431}
3432
b029bc9b
FI		 3433static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3434{
3435 if (!nfs4_sequence_done(task, &data->res.seq_res))
3436 return -EAGAIN;
d20581aa
BH		 3437 return data->write_done_cb ? data->write_done_cb(task, data) :
3438 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3439}
3440
5a37f851
TM		 3441static
3442bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3443{
5a37f851
TM		 3444 const struct nfs_pgio_header *hdr = data->header;
3445
3446 /* Don't request attributes for pNFS or O_DIRECT writes */
3447 if (data->ds_clp != NULL || hdr->dreq != NULL)
3448 return false;
3449 /* Otherwise, request attributes if and only if we don't hold
3450 * a delegation
3451 */
011e2a7f 3452 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3453}
a69aef14 3454
bdc7f021 3455static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3456{
cd841605 3457 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3458
5a37f851 3459 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3460 data->args.bitmask = NULL;
3461 data->res.fattr = NULL;
3462 } else
3463 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3464
b029bc9b
FI		 3465 if (!data->write_done_cb)
3466 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3467 data->res.server = server;
1da177e4
LT		 3468 data->timestamp = jiffies;
3469
bdc7f021 3470 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3471 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3472}
3473
c6cb80d0
BS		 3474static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3475{
cd841605 3476 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3477 &data->args.seq_args,
3478 &data->res.seq_res,
3479 task))
3480 return;
3481 rpc_call_start(task);
1da177e4
LT		 3482}
3483
0b7c0153 3484static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3485{
3486 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3487 &data->args.seq_args,
3488 &data->res.seq_res,
3489 task))
3490 return;
3491 rpc_call_start(task);
1da177e4
LT		 3492}
3493
0b7c0153 3494static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3495{
1da177e4 3496 struct inode *inode = data->inode;
14516c3a 3497
9e33bed5 3498 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3499 rpc_restart_call_prepare(task);
788e7a89 3500 return -EAGAIN;
1da177e4 3501 }
788e7a89 3502 return 0;
1da177e4
LT		 3503}
3504
0b7c0153 3505static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3506{
3507 if (!nfs4_sequence_done(task, &data->res.seq_res))
3508 return -EAGAIN;
0b7c0153 3509 return data->commit_done_cb(task, data);
5f452431
FI		 3510}
3511
0b7c0153 3512static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3513{
788e7a89 3514 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3515
0b7c0153
FI		 3516 if (data->commit_done_cb == NULL)
3517 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3518 data->res.server = server;
bdc7f021 3519 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3520 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3521}
3522
9bc4e3ca
CL		 3523struct nfs4_renewdata {
3524 struct nfs_client *client;
3525 unsigned long timestamp;
3526};
3527
1da177e4
LT		 3528/*
3529 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3530 * standalone procedure for queueing an asynchronous RENEW.
3531 */
9bc4e3ca 3532static void nfs4_renew_release(void *calldata)
dc96aef9 3533{
9bc4e3ca
CL		 3534 struct nfs4_renewdata *data = calldata;
3535 struct nfs_client *clp = data->client;
dc96aef9 3536
0851de06
AB		 3537 if (atomic_read(&clp->cl_count) > 1)
3538 nfs4_schedule_state_renewal(clp);
3539 nfs_put_client(clp);
9bc4e3ca 3540 kfree(data);
dc96aef9
AB		 3541}
3542
9bc4e3ca 3543static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3544{
9bc4e3ca
CL		 3545 struct nfs4_renewdata *data = calldata;
3546 struct nfs_client *clp = data->client;
3547 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3548
3549 if (task->tk_status < 0) {
95baa25c 3550 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3551 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3552 return;
3553 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3554 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3555 return;
3556 }
3557 nfs4_schedule_path_down_recovery(clp);
1da177e4 3558 }
452e9352 3559 do_renew_lease(clp, timestamp);
1da177e4
LT		 3560}
3561
963d8fe5
TM		 3562static const struct rpc_call_ops nfs4_renew_ops = {
3563 .rpc_call_done = nfs4_renew_done,
dc96aef9 3564 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3565};
3566
2f60ea6b 3567static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3568{
3569 struct rpc_message msg = {
3570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3571 .rpc_argp = clp,
b4454fe1 3572 .rpc_cred = cred,
1da177e4 3573 };
9bc4e3ca 3574 struct nfs4_renewdata *data;
1da177e4 3575
2f60ea6b
TM		 3576 if (renew_flags == 0)
3577 return 0;
0851de06
AB		 3578 if (!atomic_inc_not_zero(&clp->cl_count))
3579 return -EIO;
b569ad34 3580 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3581 if (data == NULL)
3582 return -ENOMEM;
3583 data->client = clp;
3584 data->timestamp = jiffies;
1da177e4 3585 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3586 &nfs4_renew_ops, data);
1da177e4
LT		 3587}
3588
8534d4ec 3589static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3590{
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3593 .rpc_argp = clp,
b4454fe1 3594 .rpc_cred = cred,
1da177e4
LT		 3595 };
3596 unsigned long now = jiffies;
3597 int status;
3598
3599 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3600 if (status < 0)
3601 return status;
452e9352 3602 do_renew_lease(clp, now);
1da177e4
LT		 3603 return 0;
3604}
3605
aa1870af
BF		 3606static inline int nfs4_server_supports_acls(struct nfs_server *server)
3607{
3608 return (server->caps & NFS_CAP_ACLS)
3609 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3610 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3611}
3612
3613/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3614 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3615 * the stack.
3616 */
3617#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3618
e9e3d724
NH		 3619static int buf_to_pages_noslab(const void *buf, size_t buflen,
3620 struct page **pages, unsigned int *pgbase)
3621{
3622 struct page *newpage, **spages;
3623 int rc = 0;
3624 size_t len;
3625 spages = pages;
3626
3627 do {
43b7c3f0 3628 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3629 newpage = alloc_page(GFP_KERNEL);
3630
3631 if (newpage == NULL)
3632 goto unwind;
3633 memcpy(page_address(newpage), buf, len);
3634 buf += len;
3635 buflen -= len;
3636 *pages++ = newpage;
3637 rc++;
3638 } while (buflen != 0);
3639
3640 return rc;
3641
3642unwind:
3643 for(; rc > 0; rc--)
3644 __free_page(spages[rc-1]);
3645 return -ENOMEM;
3646}
3647
e50a1c2e
BF		 3648struct nfs4_cached_acl {
3649 int cached;
3650 size_t len;
3e9d4154 3651 char data[0];
e50a1c2e
BF		 3652};
3653
3654static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3655{
3656 struct nfs_inode *nfsi = NFS_I(inode);
3657
3658 spin_lock(&inode->i_lock);
3659 kfree(nfsi->nfs4_acl);
3660 nfsi->nfs4_acl = acl;
3661 spin_unlock(&inode->i_lock);
3662}
3663
3664static void nfs4_zap_acl_attr(struct inode *inode)
3665{
3666 nfs4_set_cached_acl(inode, NULL);
3667}
3668
3669static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3670{
3671 struct nfs_inode *nfsi = NFS_I(inode);
3672 struct nfs4_cached_acl *acl;
3673 int ret = -ENOENT;
3674
3675 spin_lock(&inode->i_lock);
3676 acl = nfsi->nfs4_acl;
3677 if (acl == NULL)
3678 goto out;
3679 if (buf == NULL) /* user is just asking for length */
3680 goto out_len;
3681 if (acl->cached == 0)
3682 goto out;
3683 ret = -ERANGE; /* see getxattr(2) man page */
3684 if (acl->len > buflen)
3685 goto out;
3686 memcpy(buf, acl->data, acl->len);
3687out_len:
3688 ret = acl->len;
3689out:
3690 spin_unlock(&inode->i_lock);
3691 return ret;
3692}
3693
5794d21e 3694static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3695{
3696 struct nfs4_cached_acl *acl;
3697
5794d21e 3698 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3699 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3700 if (acl == NULL)
3701 goto out;
3702 acl->cached = 1;
5794d21e 3703 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3704 } else {
3705 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3706 if (acl == NULL)
3707 goto out;
3708 acl->cached = 0;
3709 }
3710 acl->len = acl_len;
3711out:
3712 nfs4_set_cached_acl(inode, acl);
3713}
3714
bf118a34
AA		 3715/*
3716 * The getxattr API returns the required buffer length when called with a
3717 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3718 * the required buf. On a NULL buf, we send a page of data to the server
3719 * guessing that the ACL request can be serviced by a page. If so, we cache
3720 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3721 * the cache. If not so, we throw away the page, and cache the required
3722 * length. The next getxattr call will then produce another round trip to
3723 * the server, this time with the input buf of the required size.
3724 */
16b4289c 3725static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3726{
bf118a34 3727 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3728 struct nfs_getaclargs args = {
3729 .fh = NFS_FH(inode),
3730 .acl_pages = pages,
3731 .acl_len = buflen,
3732 };
663c79b3
BH		 3733 struct nfs_getaclres res = {
3734 .acl_len = buflen,
3735 };
aa1870af
BF		 3736 struct rpc_message msg = {
3737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3738 .rpc_argp = &args,
663c79b3 3739 .rpc_resp = &res,
aa1870af 3740 };
bf118a34 3741 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3742
bf118a34
AA		 3743 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3744 /* As long as we're doing a round trip to the server anyway,
3745 * let's be prepared for a page of acl data. */
3746 if (npages == 0)
3747 npages = 1;
3748
5a006899
SP		 3749 /* Add an extra page to handle the bitmap returned */
3750 npages++;
3751
bf118a34
AA		 3752 for (i = 0; i < npages; i++) {
3753 pages[i] = alloc_page(GFP_KERNEL);
3754 if (!pages[i])
3755 goto out_free;
e50a1c2e 3756 }
5a006899
SP		 3757
3758 /* for decoding across pages */
3759 res.acl_scratch = alloc_page(GFP_KERNEL);
3760 if (!res.acl_scratch)
3761 goto out_free;
3762
bf118a34
AA		 3763 args.acl_len = npages * PAGE_SIZE;
3764 args.acl_pgbase = 0;
5a006899 3765
bf118a34
AA		 3766 /* Let decode_getfacl know not to fail if the ACL data is larger than
3767 * the page we send as a guess */
3768 if (buf == NULL)
3769 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3770
de040bec 3771 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3772 __func__, buf, buflen, npages, args.acl_len);
3773 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3774 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3775 if (ret)
3776 goto out_free;
bf118a34
AA		 3777
3778 acl_len = res.acl_len - res.acl_data_offset;
3779 if (acl_len > args.acl_len)
5794d21e 3780 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3781 else
5794d21e 3782 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3783 acl_len);
e50a1c2e
BF		 3784 if (buf) {
3785 ret = -ERANGE;
bf118a34 3786 if (acl_len > buflen)
e50a1c2e 3787 goto out_free;
bf118a34 3788 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3789 acl_len);
e50a1c2e 3790 }
bf118a34 3791 ret = acl_len;
e50a1c2e 3792out_free:
bf118a34
AA		 3793 for (i = 0; i < npages; i++)
3794 if (pages[i])
3795 __free_page(pages[i]);
331818f1
TM		 3796 if (res.acl_scratch)
3797 __free_page(res.acl_scratch);
aa1870af
BF		 3798 return ret;
3799}
3800
16b4289c
TM		 3801static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3802{
3803 struct nfs4_exception exception = { };
3804 ssize_t ret;
3805 do {
3806 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3807 if (ret >= 0)
3808 break;
3809 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3810 } while (exception.retry);
3811 return ret;
3812}
3813
e50a1c2e
BF		 3814static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3815{
3816 struct nfs_server *server = NFS_SERVER(inode);
3817 int ret;
3818
3819 if (!nfs4_server_supports_acls(server))
3820 return -EOPNOTSUPP;
3821 ret = nfs_revalidate_inode(server, inode);
3822 if (ret < 0)
3823 return ret;
08a22b39
AK		 3824 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3825 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3826 ret = nfs4_read_cached_acl(inode, buf, buflen);
3827 if (ret != -ENOENT)
bf118a34
AA		 3828 /* -ENOENT is returned if there is no ACL or if there is an ACL
3829 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3830 return ret;
3831 return nfs4_get_acl_uncached(inode, buf, buflen);
3832}
3833
16b4289c 3834static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3835{
3836 struct nfs_server *server = NFS_SERVER(inode);
3837 struct page *pages[NFS4ACL_MAXPAGES];
3838 struct nfs_setaclargs arg = {
3839 .fh = NFS_FH(inode),
3840 .acl_pages = pages,
3841 .acl_len = buflen,
3842 };
73c403a9 3843 struct nfs_setaclres res;
4b580ee3
BF		 3844 struct rpc_message msg = {
3845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3846 .rpc_argp = &arg,
73c403a9 3847 .rpc_resp = &res,
4b580ee3 3848 };
e9e3d724 3849 int ret, i;
4b580ee3
BF		 3850
3851 if (!nfs4_server_supports_acls(server))
3852 return -EOPNOTSUPP;
e9e3d724
NH		 3853 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3854 if (i < 0)
3855 return i;
57ec14c5 3856 nfs4_inode_return_delegation(inode);
7c513058 3857 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3858
3859 /*
3860 * Free each page after tx, so the only ref left is
3861 * held by the network stack
3862 */
3863 for (; i > 0; i--)
3864 put_page(pages[i-1]);
3865
08a22b39
AK		 3866 /*
3867 * Acl update can result in inode attribute update.
3868 * so mark the attribute cache invalid.
3869 */
3870 spin_lock(&inode->i_lock);
3871 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3872 spin_unlock(&inode->i_lock);
f41f7418
TM		 3873 nfs_access_zap_cache(inode);
3874 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3875 return ret;
3876}
3877
16b4289c
TM		 3878static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3879{
3880 struct nfs4_exception exception = { };
3881 int err;
3882 do {
3883 err = nfs4_handle_exception(NFS_SERVER(inode),
3884 __nfs4_proc_set_acl(inode, buf, buflen),
3885 &exception);
3886 } while (exception.retry);
3887 return err;
3888}
3889
1da177e4 3890static int
aa5190d0 3891nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3892{
aa5190d0
TM		 3893 struct nfs_client *clp = server->nfs_client;
3894
3895 if (task->tk_status >= 0)
1da177e4
LT		 3896 return 0;
3897 switch(task->tk_status) {
a1d0b5ee 3898 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3899 case -NFS4ERR_ADMIN_REVOKED:
3900 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3901 if (state == NULL)
3902 break;
3903 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3904 case -NFS4ERR_OPENMODE:
3905 if (state == NULL)
3906 break;
0400a6b0
TM		 3907 nfs4_schedule_stateid_recovery(server, state);
3908 goto wait_on_recovery;
0ced63d1
TM		 3909 case -NFS4ERR_EXPIRED:
3910 if (state != NULL)
3911 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3912 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3913 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3914 nfs4_schedule_lease_recovery(clp);
3915 goto wait_on_recovery;
4745e315
AA		 3916#if defined(CONFIG_NFS_V4_1)
3917 case -NFS4ERR_BADSESSION:
3918 case -NFS4ERR_BADSLOT:
3919 case -NFS4ERR_BAD_HIGH_SLOT:
3920 case -NFS4ERR_DEADSESSION:
3921 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3922 case -NFS4ERR_SEQ_FALSE_RETRY:
3923 case -NFS4ERR_SEQ_MISORDERED:
3924 dprintk("%s ERROR %d, Reset session\n", __func__,
3925 task->tk_status);
9f594791 3926 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3927 task->tk_status = 0;
3928 return -EAGAIN;
3929#endif /* CONFIG_NFS_V4_1 */
1da177e4 3930 case -NFS4ERR_DELAY:
aa5190d0 3931 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3932 case -NFS4ERR_GRACE:
2c643488 3933 case -EKEYEXPIRED:
1da177e4
LT		 3934 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3935 task->tk_status = 0;
3936 return -EAGAIN;
a8a4ae3a 3937 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3938 case -NFS4ERR_OLD_STATEID:
3939 task->tk_status = 0;
3940 return -EAGAIN;
3941 }
3942 task->tk_status = nfs4_map_errors(task->tk_status);
3943 return 0;
0400a6b0 3944wait_on_recovery:
a2c0b9e2 3945 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3946 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3947 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3948 task->tk_status = 0;
3949 return -EAGAIN;
1da177e4
LT		 3950}
3951
f092075d
CL		 3952static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3953 nfs4_verifier *bootverf)
cd93710e
CL		 3954{
3955 __be32 verf[2];
3956
2c820d9a
CL		 3957 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3958 /* An impossible timestamp guarantees this value
3959 * will never match a generated boot time. */
3960 verf[0] = 0;
3961 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3962 } else {
f092075d
CL		 3963 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3964 verf[0] = (__be32)nn->boot_time.tv_sec;
3965 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3966 }
cd93710e
CL		 3967 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3968}
3969
bb8b27e5
TM		 3970int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3971 unsigned short port, struct rpc_cred *cred,
3972 struct nfs4_setclientid_res *res)
1da177e4
LT		 3973{
3974 nfs4_verifier sc_verifier;
3975 struct nfs4_setclientid setclientid = {
3976 .sc_verifier = &sc_verifier,
3977 .sc_prog = program,
f4eecd5d 3978 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3979 };
3980 struct rpc_message msg = {
3981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3982 .rpc_argp = &setclientid,
bb8b27e5 3983 .rpc_resp = res,
286d7d6a 3984 .rpc_cred = cred,
1da177e4 3985 };
1da177e4
LT		 3986 int loop = 0;
3987 int status;
3988
f092075d 3989 nfs4_init_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3990
3991 for(;;) {
2446ab60 3992 rcu_read_lock();
1da177e4 3993 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3994 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3995 clp->cl_ipaddr,
3996 rpc_peeraddr2str(clp->cl_rpcclient,
3997 RPC_DISPLAY_ADDR),
69dd716c
TM		 3998 rpc_peeraddr2str(clp->cl_rpcclient,
3999 RPC_DISPLAY_PROTO),
78ea323b 4000 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 4001 clp->cl_id_uniquifier);
4002 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4003 sizeof(setclientid.sc_netid),
4004 rpc_peeraddr2str(clp->cl_rpcclient,
4005 RPC_DISPLAY_NETID));
1da177e4 4006 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4007 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 4008 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 4009 rcu_read_unlock();
1da177e4 4010
1bd714f2 4011 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4012 if (status != -NFS4ERR_CLID_INUSE)
4013 break;
fd954ae1
TM		 4014 if (loop != 0) {
4015 ++clp->cl_id_uniquifier;
1da177e4 4016 break;
fd954ae1
TM		 4017 }
4018 ++loop;
4019 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 4020 }
4021 return status;
4022}
4023
fd954ae1 4024int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4025 struct nfs4_setclientid_res *arg,
4026 struct rpc_cred *cred)
1da177e4
LT		 4027{
4028 struct nfs_fsinfo fsinfo;
4029 struct rpc_message msg = {
4030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4031 .rpc_argp = arg,
1da177e4 4032 .rpc_resp = &fsinfo,
286d7d6a 4033 .rpc_cred = cred,
1da177e4
LT		 4034 };
4035 unsigned long now;
4036 int status;
4037
4038 now = jiffies;
1bd714f2 4039 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4040 if (status == 0) {
4041 spin_lock(&clp->cl_lock);
4042 clp->cl_lease_time = fsinfo.lease_time * HZ;
4043 clp->cl_last_renewal = now;
4044 spin_unlock(&clp->cl_lock);
4045 }
4046 return status;
4047}
4048
fe650407
TM		 4049struct nfs4_delegreturndata {
4050 struct nfs4_delegreturnargs args;
fa178f29 4051 struct nfs4_delegreturnres res;
fe650407
TM		 4052 struct nfs_fh fh;
4053 nfs4_stateid stateid;
26e976a8 4054 unsigned long timestamp;
fa178f29 4055 struct nfs_fattr fattr;
fe650407
TM		 4056 int rpc_status;
4057};
4058
fe650407
TM		 4059static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4060{
4061 struct nfs4_delegreturndata *data = calldata;
938e1010 4062
14516c3a
TM		 4063 if (!nfs4_sequence_done(task, &data->res.seq_res))
4064 return;
938e1010 4065
79708861
RL		 4066 switch (task->tk_status) {
4067 case -NFS4ERR_STALE_STATEID:
4068 case -NFS4ERR_EXPIRED:
4069 case 0:
fa178f29 4070 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4071 break;
4072 default:
4073 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4074 -EAGAIN) {
d00c5d43 4075 rpc_restart_call_prepare(task);
79708861
RL		 4076 return;
4077 }
4078 }
4079 data->rpc_status = task->tk_status;
fe650407
TM		 4080}
4081
4082static void nfs4_delegreturn_release(void *calldata)
4083{
fe650407
TM		 4084 kfree(calldata);
4085}
4086
938e1010
AA		 4087#if defined(CONFIG_NFS_V4_1)
4088static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4089{
4090 struct nfs4_delegreturndata *d_data;
4091
4092 d_data = (struct nfs4_delegreturndata *)data;
4093
035168ab 4094 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4095 &d_data->args.seq_args,
9d12b216 4096 &d_data->res.seq_res, task))
938e1010
AA		 4097 return;
4098 rpc_call_start(task);
4099}
4100#endif /* CONFIG_NFS_V4_1 */
4101
c8d149f3 4102static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4103#if defined(CONFIG_NFS_V4_1)
4104 .rpc_call_prepare = nfs4_delegreturn_prepare,
4105#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4106 .rpc_call_done = nfs4_delegreturn_done,
4107 .rpc_release = nfs4_delegreturn_release,
4108};
4109
e6f81075 4110static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4111{
4112 struct nfs4_delegreturndata *data;
fa178f29 4113 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4114 struct rpc_task *task;
5138fde0
TM		 4115 struct rpc_message msg = {
4116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4117 .rpc_cred = cred,
4118 };
c970aa85
TM		 4119 struct rpc_task_setup task_setup_data = {
4120 .rpc_client = server->client,
5138fde0 4121 .rpc_message = &msg,
c970aa85
TM		 4122 .callback_ops = &nfs4_delegreturn_ops,
4123 .flags = RPC_TASK_ASYNC,
4124 };
e6f81075 4125 int status = 0;
fe650407 4126
8535b2be 4127 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4128 if (data == NULL)
4129 return -ENOMEM;
9d12b216 4130 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4131 data->args.fhandle = &data->fh;
4132 data->args.stateid = &data->stateid;
9e907fec 4133 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4134 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4135 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4136 data->res.fattr = &data->fattr;
4137 data->res.server = server;
5138fde0 4138 nfs_fattr_init(data->res.fattr);
26e976a8 4139 data->timestamp = jiffies;
fe650407
TM		 4140 data->rpc_status = 0;
4141
c970aa85 4142 task_setup_data.callback_data = data;
1174dd1f
TM		 4143 msg.rpc_argp = &data->args;
4144 msg.rpc_resp = &data->res;
c970aa85 4145 task = rpc_run_task(&task_setup_data);
7a1218a2 4146 if (IS_ERR(task))
fe650407 4147 return PTR_ERR(task);
e6f81075
TM		 4148 if (!issync)
4149 goto out;
fe650407 4150 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4151 if (status != 0)
4152 goto out;
4153 status = data->rpc_status;
e144cbcc
TM		 4154 if (status == 0)
4155 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4156 else
4157 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4158out:
e6b3c4db 4159 rpc_put_task(task);
fe650407 4160 return status;
1da177e4
LT		 4161}
4162
e6f81075 4163int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4164{
4165 struct nfs_server *server = NFS_SERVER(inode);
4166 struct nfs4_exception exception = { };
4167 int err;
4168 do {
e6f81075 4169 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4170 switch (err) {
4171 case -NFS4ERR_STALE_STATEID:
4172 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4173 case 0:
4174 return 0;
4175 }
4176 err = nfs4_handle_exception(server, err, &exception);
4177 } while (exception.retry);
4178 return err;
4179}
4180
4181#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4182#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4183
4184/*
4185 * sleep, with exponential backoff, and retry the LOCK operation.
4186 */
4187static unsigned long
4188nfs4_set_lock_task_retry(unsigned long timeout)
4189{
d310310c 4190 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4191 timeout <<= 1;
4192 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4193 return NFS4_LOCK_MAXTIMEOUT;
4194 return timeout;
4195}
4196
1da177e4
LT		 4197static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4198{
4199 struct inode *inode = state->inode;
4200 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4201 struct nfs_client *clp = server->nfs_client;
911d1aaf 4202 struct nfs_lockt_args arg = {
1da177e4 4203 .fh = NFS_FH(inode),
911d1aaf 4204 .fl = request,
1da177e4 4205 };
911d1aaf
TM		 4206 struct nfs_lockt_res res = {
4207 .denied = request,
1da177e4
LT		 4208 };
4209 struct rpc_message msg = {
4210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4211 .rpc_argp = &arg,
4212 .rpc_resp = &res,
4213 .rpc_cred = state->owner->so_cred,
4214 };
1da177e4
LT		 4215 struct nfs4_lock_state *lsp;
4216 int status;
4217
911d1aaf 4218 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4219 status = nfs4_set_lock_state(state, request);
4220 if (status != 0)
4221 goto out;
4222 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4223 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4224 arg.lock_owner.s_dev = server->s_dev;
7c513058 4225 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4226 switch (status) {
4227 case 0:
4228 request->fl_type = F_UNLCK;
4229 break;
4230 case -NFS4ERR_DENIED:
4231 status = 0;
1da177e4 4232 }
70cc6487 4233 request->fl_ops->fl_release_private(request);
8d0a8a9d 4234out:
1da177e4
LT		 4235 return status;
4236}
4237
4238static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4239{
4240 struct nfs4_exception exception = { };
4241 int err;
4242
4243 do {
4244 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4245 _nfs4_proc_getlk(state, cmd, request),
4246 &exception);
4247 } while (exception.retry);
4248 return err;
4249}
4250
4251static int do_vfs_lock(struct file *file, struct file_lock *fl)
4252{
4253 int res = 0;
4254 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4255 case FL_POSIX:
4256 res = posix_lock_file_wait(file, fl);
4257 break;
4258 case FL_FLOCK:
4259 res = flock_lock_file_wait(file, fl);
4260 break;
4261 default:
4262 BUG();
4263 }
1da177e4
LT		 4264 return res;
4265}
4266
faf5f49c 4267struct nfs4_unlockdata {
911d1aaf
TM		 4268 struct nfs_locku_args arg;
4269 struct nfs_locku_res res;
faf5f49c
TM		 4270 struct nfs4_lock_state *lsp;
4271 struct nfs_open_context *ctx;
911d1aaf
TM		 4272 struct file_lock fl;
4273 const struct nfs_server *server;
26e976a8 4274 unsigned long timestamp;
faf5f49c
TM		 4275};
4276
911d1aaf
TM		 4277static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4278 struct nfs_open_context *ctx,
4279 struct nfs4_lock_state *lsp,
4280 struct nfs_seqid *seqid)
4281{
4282 struct nfs4_unlockdata *p;
4283 struct inode *inode = lsp->ls_state->inode;
4284
8535b2be 4285 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4286 if (p == NULL)
4287 return NULL;
4288 p->arg.fh = NFS_FH(inode);
4289 p->arg.fl = &p->fl;
4290 p->arg.seqid = seqid;
c1d51931 4291 p->res.seqid = seqid;
911d1aaf
TM		 4292 p->arg.stateid = &lsp->ls_stateid;
4293 p->lsp = lsp;
4294 atomic_inc(&lsp->ls_count);
4295 /* Ensure we don't close file until we're done freeing locks! */
4296 p->ctx = get_nfs_open_context(ctx);
4297 memcpy(&p->fl, fl, sizeof(p->fl));
4298 p->server = NFS_SERVER(inode);
4299 return p;
4300}
4301
06f814a3 4302static void nfs4_locku_release_calldata(void *data)
faf5f49c 4303{
963d8fe5 4304 struct nfs4_unlockdata *calldata = data;
911d1aaf 4305 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4306 nfs4_put_lock_state(calldata->lsp);
4307 put_nfs_open_context(calldata->ctx);
4308 kfree(calldata);
faf5f49c
TM		 4309}
4310
963d8fe5 4311static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4312{
963d8fe5 4313 struct nfs4_unlockdata *calldata = data;
faf5f49c 4314
14516c3a
TM		 4315 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4316 return;
faf5f49c
TM		 4317 switch (task->tk_status) {
4318 case 0:
f597c537
TM		 4319 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4320 &calldata->res.stateid);
26e976a8 4321 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4322 break;
9e33bed5
TM		 4323 case -NFS4ERR_BAD_STATEID:
4324 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4325 case -NFS4ERR_STALE_STATEID:
4326 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4327 break;
4328 default:
9e33bed5 4329 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4330 rpc_restart_call_prepare(task);
faf5f49c 4331 }
faf5f49c
TM		 4332}
4333
4ce70ada 4334static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4335{
4ce70ada 4336 struct nfs4_unlockdata *calldata = data;
faf5f49c 4337
911d1aaf 4338 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4339 return;
4340 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4341 /* Note: exit _without_ running nfs4_locku_done */
4342 task->tk_action = NULL;
faf5f49c
TM		 4343 return;
4344 }
26e976a8 4345 calldata->timestamp = jiffies;
035168ab 4346 if (nfs4_setup_sequence(calldata->server,
a893693c 4347 &calldata->arg.seq_args,
9d12b216 4348 &calldata->res.seq_res, task))
a893693c 4349 return;
5138fde0 4350 rpc_call_start(task);
faf5f49c
TM		 4351}
4352
963d8fe5 4353static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4354 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4355 .rpc_call_done = nfs4_locku_done,
06f814a3 4356 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4357};
4358
a5d16a4d
TM		 4359static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4360 struct nfs_open_context *ctx,
4361 struct nfs4_lock_state *lsp,
4362 struct nfs_seqid *seqid)
4363{
4364 struct nfs4_unlockdata *data;
5138fde0
TM		 4365 struct rpc_message msg = {
4366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4367 .rpc_cred = ctx->cred,
4368 };
c970aa85
TM		 4369 struct rpc_task_setup task_setup_data = {
4370 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4371 .rpc_message = &msg,
c970aa85 4372 .callback_ops = &nfs4_locku_ops,
101070ca 4373 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4374 .flags = RPC_TASK_ASYNC,
4375 };
a5d16a4d 4376
137d6aca
FF		 4377 /* Ensure this is an unlock - when canceling a lock, the
4378 * canceled lock is passed in, and it won't be an unlock.
4379 */
4380 fl->fl_type = F_UNLCK;
4381
a5d16a4d
TM		 4382 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4383 if (data == NULL) {
4384 nfs_free_seqid(seqid);
4385 return ERR_PTR(-ENOMEM);
4386 }
4387
9d12b216 4388 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4389 msg.rpc_argp = &data->arg;
4390 msg.rpc_resp = &data->res;
c970aa85
TM		 4391 task_setup_data.callback_data = data;
4392 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4393}
4394
faf5f49c
TM		 4395static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4396{
19e03c57 4397 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4398 struct nfs_seqid *seqid;
1da177e4 4399 struct nfs4_lock_state *lsp;
06f814a3
TM		 4400 struct rpc_task *task;
4401 int status = 0;
536ff0f8 4402 unsigned char fl_flags = request->fl_flags;
faf5f49c 4403
8d0a8a9d 4404 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4405 /* Unlock _before_ we do the RPC call */
4406 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4407 down_read(&nfsi->rwsem);
4408 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4409 up_read(&nfsi->rwsem);
9b073574 4410 goto out;
19e03c57
TM		 4411 }
4412 up_read(&nfsi->rwsem);
8d0a8a9d 4413 if (status != 0)
9b073574
TM		 4414 goto out;
4415 /* Is this a delegated lock? */
4416 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4417 goto out;
8d0a8a9d 4418 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4419 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4420 status = -ENOMEM;
911d1aaf 4421 if (seqid == NULL)
9b073574 4422 goto out;
cd3758e3 4423 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4424 status = PTR_ERR(task);
4425 if (IS_ERR(task))
9b073574 4426 goto out;
a5d16a4d 4427 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4428 rpc_put_task(task);
9b073574 4429out:
536ff0f8 4430 request->fl_flags = fl_flags;
1da177e4
LT		 4431 return status;
4432}
4433
a5d16a4d
TM		 4434struct nfs4_lockdata {
4435 struct nfs_lock_args arg;
4436 struct nfs_lock_res res;
4437 struct nfs4_lock_state *lsp;
4438 struct nfs_open_context *ctx;
4439 struct file_lock fl;
26e976a8 4440 unsigned long timestamp;
a5d16a4d
TM		 4441 int rpc_status;
4442 int cancelled;
66179efe 4443 struct nfs_server *server;
a5d16a4d
TM		 4444};
4445
4446static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4447 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4448 gfp_t gfp_mask)
1da177e4 4449{
a5d16a4d
TM		 4450 struct nfs4_lockdata *p;
4451 struct inode *inode = lsp->ls_state->inode;
1da177e4 4452 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4453
8535b2be 4454 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4455 if (p == NULL)
4456 return NULL;
4457
4458 p->arg.fh = NFS_FH(inode);
4459 p->arg.fl = &p->fl;
8535b2be 4460 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4461 if (p->arg.open_seqid == NULL)
4462 goto out_free;
8535b2be 4463 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4464 if (p->arg.lock_seqid == NULL)
2f74c0a0 4465 goto out_free_seqid;
a5d16a4d 4466 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4467 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4468 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4469 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4470 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4471 p->lsp = lsp;
66179efe 4472 p->server = server;
a5d16a4d
TM		 4473 atomic_inc(&lsp->ls_count);
4474 p->ctx = get_nfs_open_context(ctx);
4475 memcpy(&p->fl, fl, sizeof(p->fl));
4476 return p;
2f74c0a0
TM		 4477out_free_seqid:
4478 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4479out_free:
4480 kfree(p);
4481 return NULL;
4482}
4483
4484static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4485{
4486 struct nfs4_lockdata *data = calldata;
4487 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4488
3110ff80 4489 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4490 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4491 return;
a5d16a4d
TM		 4492 /* Do we need to do an open_to_lock_owner? */
4493 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4494 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4495 return;
a5d16a4d
TM		 4496 data->arg.open_stateid = &state->stateid;
4497 data->arg.new_lock_owner = 1;
c1d51931 4498 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4499 } else
4500 data->arg.new_lock_owner = 0;
26e976a8 4501 data->timestamp = jiffies;
035168ab
TM		 4502 if (nfs4_setup_sequence(data->server,
4503 &data->arg.seq_args,
9d12b216 4504 &data->res.seq_res, task))
66179efe 4505 return;
5138fde0 4506 rpc_call_start(task);
3110ff80 4507 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4508}
4509
b257957e
AB		 4510static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4511{
4512 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4513 nfs4_lock_prepare(task, calldata);
4514}
4515
a5d16a4d
TM		 4516static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4517{
4518 struct nfs4_lockdata *data = calldata;
4519
3110ff80 4520 dprintk("%s: begin!\n", __func__);
a5d16a4d 4521
14516c3a
TM		 4522 if (!nfs4_sequence_done(task, &data->res.seq_res))
4523 return;
66179efe 4524
a5d16a4d 4525 data->rpc_status = task->tk_status;
a5d16a4d 4526 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4527 if (data->rpc_status == 0)
4528 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4529 else
4530 goto out;
4531 }
4532 if (data->rpc_status == 0) {
f597c537 4533 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4534 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4535 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4536 }
a5d16a4d 4537out:
3110ff80 4538 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4539}
4540
4541static void nfs4_lock_release(void *calldata)
4542{
4543 struct nfs4_lockdata *data = calldata;
4544
3110ff80 4545 dprintk("%s: begin!\n", __func__);
2f74c0a0 4546 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4547 if (data->cancelled != 0) {
4548 struct rpc_task *task;
4549 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4550 data->arg.lock_seqid);
4551 if (!IS_ERR(task))
bf294b41 4552 rpc_put_task_async(task);
3110ff80 4553 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4554 } else
4555 nfs_free_seqid(data->arg.lock_seqid);
4556 nfs4_put_lock_state(data->lsp);
4557 put_nfs_open_context(data->ctx);
4558 kfree(data);
3110ff80 4559 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4560}
4561
4562static const struct rpc_call_ops nfs4_lock_ops = {
4563 .rpc_call_prepare = nfs4_lock_prepare,
4564 .rpc_call_done = nfs4_lock_done,
4565 .rpc_release = nfs4_lock_release,
4566};
4567
b257957e
AB		 4568static const struct rpc_call_ops nfs4_recover_lock_ops = {
4569 .rpc_call_prepare = nfs4_recover_lock_prepare,
4570 .rpc_call_done = nfs4_lock_done,
4571 .rpc_release = nfs4_lock_release,
4572};
4573
2bee72a6
TM		 4574static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4575{
2bee72a6
TM		 4576 switch (error) {
4577 case -NFS4ERR_ADMIN_REVOKED:
4578 case -NFS4ERR_BAD_STATEID:
ecac799a 4579 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4580 if (new_lock_owner != 0 ||
4581 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4582 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4583 break;
4584 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4585 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4586 case -NFS4ERR_EXPIRED:
4587 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4588 };
4589}
4590
afe6c27c 4591static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4592{
4593 struct nfs4_lockdata *data;
4594 struct rpc_task *task;
5138fde0
TM		 4595 struct rpc_message msg = {
4596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4597 .rpc_cred = state->owner->so_cred,
4598 };
c970aa85
TM		 4599 struct rpc_task_setup task_setup_data = {
4600 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4601 .rpc_message = &msg,
c970aa85 4602 .callback_ops = &nfs4_lock_ops,
101070ca 4603 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4604 .flags = RPC_TASK_ASYNC,
4605 };
a5d16a4d
TM		 4606 int ret;
4607
3110ff80 4608 dprintk("%s: begin!\n", __func__);
cd3758e3 4609 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4610 fl->fl_u.nfs4_fl.owner,
4611 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4612 if (data == NULL)
4613 return -ENOMEM;
4614 if (IS_SETLKW(cmd))
4615 data->arg.block = 1;
b257957e
AB		 4616 if (recovery_type > NFS_LOCK_NEW) {
4617 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4618 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4619 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4620 }
9d12b216 4621 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4622 msg.rpc_argp = &data->arg;
4623 msg.rpc_resp = &data->res;
c970aa85
TM		 4624 task_setup_data.callback_data = data;
4625 task = rpc_run_task(&task_setup_data);
7a1218a2 4626 if (IS_ERR(task))
a5d16a4d 4627 return PTR_ERR(task);
a5d16a4d
TM		 4628 ret = nfs4_wait_for_completion_rpc_task(task);
4629 if (ret == 0) {
4630 ret = data->rpc_status;
2bee72a6
TM		 4631 if (ret)
4632 nfs4_handle_setlk_error(data->server, data->lsp,
4633 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4634 } else
4635 data->cancelled = 1;
e6b3c4db 4636 rpc_put_task(task);
3110ff80 4637 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4638 return ret;
1da177e4
LT		 4639}
4640
4641static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4642{
202b50dc 4643 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4644 struct nfs4_exception exception = {
4645 .inode = state->inode,
4646 };
202b50dc
TM		 4647 int err;
4648
4649 do {
42a2d13e
TM		 4650 /* Cache the lock if possible... */
4651 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4652 return 0;
afe6c27c 4653 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4654 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4655 break;
4656 nfs4_handle_exception(server, err, &exception);
4657 } while (exception.retry);
4658 return err;
1da177e4
LT		 4659}
4660
4661static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4662{
202b50dc 4663 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4664 struct nfs4_exception exception = {
4665 .inode = state->inode,
4666 };
202b50dc
TM		 4667 int err;
4668
6bfc93ef
TM		 4669 err = nfs4_set_lock_state(state, request);
4670 if (err != 0)
4671 return err;
202b50dc 4672 do {
42a2d13e
TM		 4673 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4674 return 0;
afe6c27c 4675 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4676 switch (err) {
4677 default:
4678 goto out;
4679 case -NFS4ERR_GRACE:
4680 case -NFS4ERR_DELAY:
4681 nfs4_handle_exception(server, err, &exception);
4682 err = 0;
4683 }
202b50dc 4684 } while (exception.retry);
a9ed2e25 4685out:
202b50dc 4686 return err;
1da177e4
LT		 4687}
4688
f062eb6c 4689#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4690static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4691{
b01dd1d8
BS		 4692 int status, ret = NFS_OK;
4693 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4694 struct nfs_server *server = NFS_SERVER(state->inode);
4695
b01dd1d8
BS		 4696 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4697 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4698 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4699 if (status != NFS_OK) {
4700 nfs41_free_stateid(server, &lsp->ls_stateid);
4701 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4702 ret = status;
4703 }
4704 }
4705 };
4706
4707 return ret;
4708}
4709
4710static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4711{
4712 int status = NFS_OK;
4713
4714 if (test_bit(LK_STATE_IN_USE, &state->flags))
4715 status = nfs41_check_expired_locks(state);
f062eb6c 4716 if (status == NFS_OK)
b01dd1d8 4717 return status;
f062eb6c
BS		 4718 return nfs4_lock_expired(state, request);
4719}
4720#endif
4721
1da177e4
LT		 4722static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4723{
19e03c57 4724 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4725 unsigned char fl_flags = request->fl_flags;
8e469ebd 4726 int status = -ENOLCK;
1da177e4 4727
8e469ebd
TM		 4728 if ((fl_flags & FL_POSIX) &&
4729 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4730 goto out;
6bfc93ef 4731 /* Is this a delegated open? */
6bfc93ef
TM		 4732 status = nfs4_set_lock_state(state, request);
4733 if (status != 0)
4734 goto out;
01c3b861
TM		 4735 request->fl_flags |= FL_ACCESS;
4736 status = do_vfs_lock(request->fl_file, request);
4737 if (status < 0)
4738 goto out;
19e03c57 4739 down_read(&nfsi->rwsem);
01c3b861 4740 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4741 /* Yes: cache locks! */
01c3b861 4742 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4743 request->fl_flags = fl_flags & ~FL_SLEEP;
4744 status = do_vfs_lock(request->fl_file, request);
4745 goto out_unlock;
01c3b861 4746 }
afe6c27c 4747 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4748 if (status != 0)
01c3b861 4749 goto out_unlock;
6bfc93ef 4750 /* Note: we always want to sleep here! */
01c3b861 4751 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4752 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4753 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4754 "manager!\n", __func__);
01c3b861 4755out_unlock:
19e03c57 4756 up_read(&nfsi->rwsem);
01c3b861
TM		 4757out:
4758 request->fl_flags = fl_flags;
1da177e4
LT		 4759 return status;
4760}
4761
4762static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4763{
a1d0b5ee
TM		 4764 struct nfs4_exception exception = {
4765 .state = state,
05ffe24f 4766 .inode = state->inode,
a1d0b5ee 4767 };
1da177e4
LT		 4768 int err;
4769
4770 do {
965b5d67
TM		 4771 err = _nfs4_proc_setlk(state, cmd, request);
4772 if (err == -NFS4ERR_DENIED)
4773 err = -EAGAIN;
1da177e4 4774 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4775 err, &exception);
1da177e4
LT		 4776 } while (exception.retry);
4777 return err;
4778}
4779
4780static int
4781nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4782{
4783 struct nfs_open_context *ctx;
4784 struct nfs4_state *state;
4785 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4786 int status;
4787
4788 /* verify open state */
cd3758e3 4789 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4790 state = ctx->state;
4791
4792 if (request->fl_start < 0 || request->fl_end < 0)
4793 return -EINVAL;
4794
d953126a
TM		 4795 if (IS_GETLK(cmd)) {
4796 if (state != NULL)
4797 return nfs4_proc_getlk(state, F_GETLK, request);
4798 return 0;
4799 }
1da177e4
LT		 4800
4801 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4802 return -EINVAL;
4803
d953126a
TM		 4804 if (request->fl_type == F_UNLCK) {
4805 if (state != NULL)
4806 return nfs4_proc_unlck(state, cmd, request);
4807 return 0;
4808 }
1da177e4 4809
d953126a
TM		 4810 if (state == NULL)
4811 return -ENOLCK;
55725513
TM		 4812 /*
4813 * Don't rely on the VFS having checked the file open mode,
4814 * since it won't do this for flock() locks.
4815 */
4816 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4817 case F_RDLCK:
4818 if (!(filp->f_mode & FMODE_READ))
4819 return -EBADF;
4820 break;
4821 case F_WRLCK:
4822 if (!(filp->f_mode & FMODE_WRITE))
4823 return -EBADF;
4824 }
4825
1da177e4
LT		 4826 do {
4827 status = nfs4_proc_setlk(state, cmd, request);
4828 if ((status != -EAGAIN) || IS_SETLK(cmd))
4829 break;
4830 timeout = nfs4_set_lock_task_retry(timeout);
4831 status = -ERESTARTSYS;
4832 if (signalled())
4833 break;
4834 } while(status < 0);
1da177e4
LT		 4835 return status;
4836}
4837
888e694c
TM		 4838int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4839{
4840 struct nfs_server *server = NFS_SERVER(state->inode);
4841 struct nfs4_exception exception = { };
4842 int err;
4843
4844 err = nfs4_set_lock_state(state, fl);
4845 if (err != 0)
4846 goto out;
4847 do {
afe6c27c 4848 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4849 switch (err) {
4850 default:
a030889a
WAA		 4851 printk(KERN_ERR "NFS: %s: unhandled error "
4852 "%d.\n", __func__, err);
d5122201 4853 case 0:
965b5d67 4854 case -ESTALE:
d5122201
TM		 4855 goto out;
4856 case -NFS4ERR_EXPIRED:
0ced63d1 4857 nfs4_schedule_stateid_recovery(server, state);
d5122201 4858 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4859 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4860 nfs4_schedule_lease_recovery(server->nfs_client);
4861 goto out;
74e7bb73
RL		 4862 case -NFS4ERR_BADSESSION:
4863 case -NFS4ERR_BADSLOT:
4864 case -NFS4ERR_BAD_HIGH_SLOT:
4865 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4866 case -NFS4ERR_DEADSESSION:
9f594791 4867 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4868 goto out;
965b5d67
TM		 4869 case -ERESTARTSYS:
4870 /*
4871 * The show must go on: exit, but mark the
4872 * stateid as needing recovery.
4873 */
a1d0b5ee 4874 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4875 case -NFS4ERR_ADMIN_REVOKED:
4876 case -NFS4ERR_BAD_STATEID:
4877 case -NFS4ERR_OPENMODE:
0400a6b0 4878 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4879 err = 0;
4880 goto out;
168667c4
TM		 4881 case -EKEYEXPIRED:
4882 /*
4883 * User RPCSEC_GSS context has expired.
4884 * We cannot recover this stateid now, so
4885 * skip it and allow recovery thread to
4886 * proceed.
4887 */
4888 err = 0;
4889 goto out;
965b5d67
TM		 4890 case -ENOMEM:
4891 case -NFS4ERR_DENIED:
4892 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4893 err = 0;
4894 goto out;
d5122201
TM		 4895 case -NFS4ERR_DELAY:
4896 break;
4897 }
888e694c
TM		 4898 err = nfs4_handle_exception(server, err, &exception);
4899 } while (exception.retry);
4900out:
4901 return err;
4902}
6b3b5496 4903
cf470c3e
TM		 4904struct nfs_release_lockowner_data {
4905 struct nfs4_lock_state *lsp;
5ae67c4f 4906 struct nfs_server *server;
cf470c3e
TM		 4907 struct nfs_release_lockowner_args args;
4908};
4909
d3c7b7cc
TM		 4910static void nfs4_release_lockowner_release(void *calldata)
4911{
cf470c3e 4912 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4913 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4914 kfree(calldata);
4915}
4916
17280175 4917static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4918 .rpc_release = nfs4_release_lockowner_release,
4919};
4920
cf470c3e 4921int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4922{
4923 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4924 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4925 struct rpc_message msg = {
4926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4927 };
4928
4929 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4930 return -EINVAL;
4931 data = kmalloc(sizeof(*data), GFP_NOFS);
4932 if (!data)
4933 return -ENOMEM;
4934 data->lsp = lsp;
5ae67c4f 4935 data->server = server;
cf470c3e
TM		 4936 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4937 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4938 data->args.lock_owner.s_dev = server->s_dev;
4939 msg.rpc_argp = &data->args;
4940 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4941 return 0;
d3c7b7cc
TM		 4942}
4943
aa1870af
BF		 4944#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4945
64c2ce8b
AK		 4946static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4947 const void *buf, size_t buflen,
4948 int flags, int type)
6b3b5496 4949{
64c2ce8b
AK		 4950 if (strcmp(key, "") != 0)
4951 return -EINVAL;
4b580ee3 4952
64c2ce8b 4953 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4954}
4955
64c2ce8b
AK		 4956static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4957 void *buf, size_t buflen, int type)
6b3b5496 4958{
64c2ce8b
AK		 4959 if (strcmp(key, "") != 0)
4960 return -EINVAL;
aa1870af 4961
64c2ce8b 4962 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4963}
4964
64c2ce8b
AK		 4965static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4966 size_t list_len, const char *name,
4967 size_t name_len, int type)
6b3b5496 4968{
64c2ce8b 4969 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4970
096455a2
BF		 4971 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4972 return 0;
64c2ce8b
AK		 4973
4974 if (list && len <= list_len)
4975 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4976 return len;
6b3b5496
BF		 4977}
4978
533eb461
AA		 4979/*
4980 * nfs_fhget will use either the mounted_on_fileid or the fileid
4981 */
69aaaae1
TM		 4982static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4983{
533eb461
AA		 4984 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4985 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4986 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4987 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4988 return;
4989
4990 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4991 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4992 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4993 fattr->nlink = 2;
4994}
4995
f05d147f
BS		 4996static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4997 const struct qstr *name,
4998 struct nfs4_fs_locations *fs_locations,
4999 struct page *page)
683b57b4
TM		 5000{
5001 struct nfs_server *server = NFS_SERVER(dir);
5002 u32 bitmask[2] = {
361e624f 5003 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5004 };
5005 struct nfs4_fs_locations_arg args = {
5006 .dir_fh = NFS_FH(dir),
c228fd3a 5007 .name = name,
683b57b4
TM		 5008 .page = page,
5009 .bitmask = bitmask,
5010 };
22958463
BH		 5011 struct nfs4_fs_locations_res res = {
5012 .fs_locations = fs_locations,
5013 };
683b57b4
TM		 5014 struct rpc_message msg = {
5015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5016 .rpc_argp = &args,
22958463 5017 .rpc_resp = &res,
683b57b4
TM		 5018 };
5019 int status;
5020
3110ff80 5021 dprintk("%s: start\n", __func__);
533eb461
AA		 5022
5023 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5024 * is not supported */
5025 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5026 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5027 else
5028 bitmask[0] |= FATTR4_WORD0_FILEID;
5029
c228fd3a 5030 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5031 fs_locations->server = server;
830b8e33 5032 fs_locations->nlocations = 0;
f05d147f 5033 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5034 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5035 return status;
5036}
5037
f05d147f
BS		 5038int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5039 const struct qstr *name,
5040 struct nfs4_fs_locations *fs_locations,
5041 struct page *page)
db0a9593
BS		 5042{
5043 struct nfs4_exception exception = { };
5044 int err;
5045 do {
5046 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5047 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5048 &exception);
5049 } while (exception.retry);
5050 return err;
5051}
5052
5a5ea0d4
BS		 5053static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5054{
5055 int status;
5056 struct nfs4_secinfo_arg args = {
5057 .dir_fh = NFS_FH(dir),
5058 .name = name,
5059 };
5060 struct nfs4_secinfo_res res = {
5061 .flavors = flavors,
5062 };
5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5065 .rpc_argp = &args,
5066 .rpc_resp = &res,
5067 };
5068
5069 dprintk("NFS call secinfo %s\n", name->name);
5070 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5071 dprintk("NFS reply secinfo: %d\n", status);
5072 return status;
5073}
5074
72de53ec
BS		 5075int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5076 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5077{
5078 struct nfs4_exception exception = { };
5079 int err;
5080 do {
5081 err = nfs4_handle_exception(NFS_SERVER(dir),
5082 _nfs4_proc_secinfo(dir, name, flavors),
5083 &exception);
5084 } while (exception.retry);
5085 return err;
5086}
5087
557134a3 5088#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5089/*
5090 * Check the exchange flags returned by the server for invalid flags, having
5091 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5092 * DS flags set.
5093 */
5094static int nfs4_check_cl_exchange_flags(u32 flags)
5095{
5096 if (flags & ~EXCHGID4_FLAG_MASK_R)
5097 goto out_inval;
5098 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5099 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5100 goto out_inval;
5101 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5102 goto out_inval;
5103 return NFS_OK;
5104out_inval:
5105 return -NFS4ERR_INVAL;
5106}
5107
78fe0f41 5108static bool
79d4e1f0
CL		 5109nfs41_same_server_scope(struct nfs41_server_scope *a,
5110 struct nfs41_server_scope *b)
78fe0f41
WAA		 5111{
5112 if (a->server_scope_sz == b->server_scope_sz &&
5113 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5114 return true;
5115
5116 return false;
5117}
5118
7c44f1ae
WAA		 5119/*
5120 * nfs4_proc_bind_conn_to_session()
5121 *
5122 * The 4.1 client currently uses the same TCP connection for the
5123 * fore and backchannel.
5124 */
2cf047c9 5125int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5126{
5127 int status;
5128 struct nfs41_bind_conn_to_session_res res;
5129 struct rpc_message msg = {
5130 .rpc_proc =
5131 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5132 .rpc_argp = clp,
5133 .rpc_resp = &res,
2cf047c9 5134 .rpc_cred = cred,
7c44f1ae
WAA		 5135 };
5136
5137 dprintk("--> %s\n", __func__);
5138 BUG_ON(clp == NULL);
5139
5140 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5141 if (unlikely(res.session == NULL)) {
5142 status = -ENOMEM;
5143 goto out;
5144 }
5145
5146 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5147 if (status == 0) {
5148 if (memcmp(res.session->sess_id.data,
5149 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5150 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5151 status = -EIO;
5152 goto out_session;
5153 }
5154 if (res.dir != NFS4_CDFS4_BOTH) {
5155 dprintk("NFS: %s: Unexpected direction from server\n",
5156 __func__);
5157 status = -EIO;
5158 goto out_session;
5159 }
5160 if (res.use_conn_in_rdma_mode) {
5161 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5162 __func__);
5163 status = -EIO;
5164 goto out_session;
5165 }
5166 }
5167out_session:
5168 kfree(res.session);
5169out:
5170 dprintk("<-- %s status= %d\n", __func__, status);
5171 return status;
5172}
5173
99fe60d0
BH		 5174/*
5175 * nfs4_proc_exchange_id()
5176 *
5177 * Since the clientid has expired, all compounds using sessions
5178 * associated with the stale clientid will be returning
5179 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5180 * be in some phase of session reset.
5181 */
4d643d1d 5182int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5183{
5184 nfs4_verifier verifier;
5185 struct nfs41_exchange_id_args args = {
cd93710e 5186 .verifier = &verifier,
99fe60d0 5187 .client = clp,
357f54d6 5188 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5189 };
5190 struct nfs41_exchange_id_res res = {
32b01310 5191 0
99fe60d0
BH		 5192 };
5193 int status;
5194 struct rpc_message msg = {
5195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5196 .rpc_argp = &args,
5197 .rpc_resp = &res,
5198 .rpc_cred = cred,
5199 };
99fe60d0
BH		 5200
5201 dprintk("--> %s\n", __func__);
5202 BUG_ON(clp == NULL);
a7b72103 5203
f092075d 5204 nfs4_init_boot_verifier(clp, &verifier);
99fe60d0 5205
c7a360b0 5206 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5207 "%s/%s/%u",
c7a360b0 5208 clp->cl_ipaddr,
3617e503 5209 clp->cl_rpcclient->cl_nodename,
c7a360b0 5210 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5211
acdeb69d 5212 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5213 GFP_NOFS);
acdeb69d 5214 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5215 status = -ENOMEM;
5216 goto out;
5217 }
78fe0f41 5218
79d4e1f0 5219 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5220 GFP_NOFS);
177313f1 5221 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5222 status = -ENOMEM;
acdeb69d 5223 goto out_server_owner;
abe9a6d5 5224 }
78fe0f41 5225
bbafffd2 5226 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5227 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5228 status = -ENOMEM;
5229 goto out_server_scope;
5230 }
5231
1bd714f2 5232 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5233 if (status == 0)
32b01310 5234 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5235
acdeb69d 5236 if (status == 0) {
32b01310
TM		 5237 clp->cl_clientid = res.clientid;
5238 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5239 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5240 clp->cl_seqid = res.seqid;
5241
acdeb69d
CL		 5242 kfree(clp->cl_serverowner);
5243 clp->cl_serverowner = res.server_owner;
5244 res.server_owner = NULL;
78fe0f41 5245
7d2ed9ac 5246 /* use the most recent implementation id */
59155546
CL		 5247 kfree(clp->cl_implid);
5248 clp->cl_implid = res.impl_id;
7d2ed9ac 5249
177313f1 5250 if (clp->cl_serverscope != NULL &&
79d4e1f0 5251 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5252 res.server_scope)) {
5253 dprintk("%s: server_scope mismatch detected\n",
5254 __func__);
5255 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5256 kfree(clp->cl_serverscope);
5257 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5258 }
5259
177313f1 5260 if (clp->cl_serverscope == NULL) {
79d4e1f0 5261 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5262 goto out;
5263 }
32b01310
TM		 5264 } else
5265 kfree(res.impl_id);
7d2ed9ac 5266
acdeb69d
CL		 5267out_server_owner:
5268 kfree(res.server_owner);
7d2ed9ac 5269out_server_scope:
abe9a6d5
WAA		 5270 kfree(res.server_scope);
5271out:
177313f1 5272 if (clp->cl_implid != NULL)
7d2ed9ac
WAA		 5273 dprintk("%s: Server Implementation ID: "
5274 "domain: %s, name: %s, date: %llu,%u\n",
59155546
CL		 5275 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5276 clp->cl_implid->date.seconds,
5277 clp->cl_implid->date.nseconds);
99fe60d0
BH		 5278 dprintk("<-- %s status= %d\n", __func__, status);
5279 return status;
5280}
5281
66245539
TM		 5282static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5283 struct rpc_cred *cred)
5284{
5285 struct rpc_message msg = {
5286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5287 .rpc_argp = clp,
5288 .rpc_cred = cred,
5289 };
5290 int status;
5291
5292 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5293 if (status)
02c67525 5294 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5295 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5296 return status;
5297}
5298
5299static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5300 struct rpc_cred *cred)
5301{
5302 unsigned int loop;
5303 int ret;
5304
5305 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5306 ret = _nfs4_proc_destroy_clientid(clp, cred);
5307 switch (ret) {
5308 case -NFS4ERR_DELAY:
5309 case -NFS4ERR_CLIENTID_BUSY:
5310 ssleep(1);
5311 break;
5312 default:
5313 return ret;
5314 }
5315 }
5316 return 0;
5317}
5318
5319int nfs4_destroy_clientid(struct nfs_client *clp)
5320{
5321 struct rpc_cred *cred;
5322 int ret = 0;
5323
5324 if (clp->cl_mvops->minor_version < 1)
5325 goto out;
5326 if (clp->cl_exchange_flags == 0)
5327 goto out;
5328 cred = nfs4_get_exchange_id_cred(clp);
5329 ret = nfs4_proc_destroy_clientid(clp, cred);
5330 if (cred)
5331 put_rpccred(cred);
5332 switch (ret) {
5333 case 0:
5334 case -NFS4ERR_STALE_CLIENTID:
5335 clp->cl_exchange_flags = 0;
5336 }
5337out:
5338 return ret;
5339}
5340
2050f0cc
AA		 5341struct nfs4_get_lease_time_data {
5342 struct nfs4_get_lease_time_args *args;
5343 struct nfs4_get_lease_time_res *res;
5344 struct nfs_client *clp;
5345};
5346
5347static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5348 void *calldata)
5349{
5350 int ret;
5351 struct nfs4_get_lease_time_data *data =
5352 (struct nfs4_get_lease_time_data *)calldata;
5353
5354 dprintk("--> %s\n", __func__);
689cf5c1 5355 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5356 /* just setup sequence, do not trigger session recovery
5357 since we're invoked within one */
5358 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5359 &data->args->la_seq_args,
9d12b216 5360 &data->res->lr_seq_res, task);
2050f0cc
AA		 5361
5362 BUG_ON(ret == -EAGAIN);
5363 rpc_call_start(task);
5364 dprintk("<-- %s\n", __func__);
5365}
5366
5367/*
5368 * Called from nfs4_state_manager thread for session setup, so don't recover
5369 * from sequence operation or clientid errors.
5370 */
5371static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5372{
5373 struct nfs4_get_lease_time_data *data =
5374 (struct nfs4_get_lease_time_data *)calldata;
5375
5376 dprintk("--> %s\n", __func__);
14516c3a
TM		 5377 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5378 return;
2050f0cc
AA		 5379 switch (task->tk_status) {
5380 case -NFS4ERR_DELAY:
5381 case -NFS4ERR_GRACE:
5382 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5383 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5384 task->tk_status = 0;
a8a4ae3a
AA		 5385 /* fall through */
5386 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5387 rpc_restart_call_prepare(task);
2050f0cc
AA		 5388 return;
5389 }
2050f0cc
AA		 5390 dprintk("<-- %s\n", __func__);
5391}
5392
17280175 5393static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5394 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5395 .rpc_call_done = nfs4_get_lease_time_done,
5396};
5397
5398int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5399{
5400 struct rpc_task *task;
5401 struct nfs4_get_lease_time_args args;
5402 struct nfs4_get_lease_time_res res = {
5403 .lr_fsinfo = fsinfo,
5404 };
5405 struct nfs4_get_lease_time_data data = {
5406 .args = &args,
5407 .res = &res,
5408 .clp = clp,
5409 };
5410 struct rpc_message msg = {
5411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5412 .rpc_argp = &args,
5413 .rpc_resp = &res,
5414 };
5415 struct rpc_task_setup task_setup = {
5416 .rpc_client = clp->cl_rpcclient,
5417 .rpc_message = &msg,
5418 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5419 .callback_data = &data,
5420 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5421 };
5422 int status;
5423
9d12b216 5424 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5425 dprintk("--> %s\n", __func__);
5426 task = rpc_run_task(&task_setup);
5427
5428 if (IS_ERR(task))
5429 status = PTR_ERR(task);
5430 else {
5431 status = task->tk_status;
5432 rpc_put_task(task);
5433 }
5434 dprintk("<-- %s return %d\n", __func__, status);
5435
5436 return status;
5437}
5438
f86f36a6
TM		 5439static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5440{
5441 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5442}
5443
5444static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5445 struct nfs4_slot *new,
5446 u32 max_slots,
5447 u32 ivalue)
5448{
5449 struct nfs4_slot *old = NULL;
5450 u32 i;
5451
5452 spin_lock(&tbl->slot_tbl_lock);
5453 if (new) {
5454 old = tbl->slots;
5455 tbl->slots = new;
5456 tbl->max_slots = max_slots;
5457 }
5458 tbl->highest_used_slotid = -1; /* no slot is currently used */
5459 for (i = 0; i < tbl->max_slots; i++)
5460 tbl->slots[i].seq_nr = ivalue;
5461 spin_unlock(&tbl->slot_tbl_lock);
5462 kfree(old);
5463}
5464
b73dafa7 5465/*
f86f36a6 5466 * (re)Initialise a slot table
b73dafa7 5467 */
f86f36a6
TM		 5468static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5469 u32 ivalue)
ac72b7b3 5470{
104aeba4 5471 struct nfs4_slot *new = NULL;
f86f36a6 5472 int ret = -ENOMEM;
ac72b7b3 5473
104aeba4
AA		 5474 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5475 max_reqs, tbl->max_slots);
ac72b7b3 5476
104aeba4
AA		 5477 /* Does the newly negotiated max_reqs match the existing slot table? */
5478 if (max_reqs != tbl->max_slots) {
f86f36a6 5479 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5480 if (!new)
5481 goto out;
104aeba4 5482 }
f86f36a6
TM		 5483 ret = 0;
5484
5485 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5486 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5487 tbl, tbl->slots, tbl->max_slots);
5488out:
5489 dprintk("<-- %s: return %d\n", __func__, ret);
5490 return ret;
5491}
5492
f8625a6a
RL		 5493/* Destroy the slot table */
5494static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5495{
5496 if (session->fc_slot_table.slots != NULL) {
5497 kfree(session->fc_slot_table.slots);
5498 session->fc_slot_table.slots = NULL;
5499 }
5500 if (session->bc_slot_table.slots != NULL) {
5501 kfree(session->bc_slot_table.slots);
5502 session->bc_slot_table.slots = NULL;
5503 }
5504 return;
5505}
5506
050047ce 5507/*
aacd5537 5508 * Initialize or reset the forechannel and backchannel tables
050047ce 5509 */
aacd5537 5510static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5511{
f26468fb 5512 struct nfs4_slot_table *tbl;
aacd5537 5513 int status;
050047ce 5514
aacd5537
AA		 5515 dprintk("--> %s\n", __func__);
5516 /* Fore channel */
5517 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5518 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5519 if (status) /* -ENOMEM */
5520 return status;
aacd5537
AA		 5521 /* Back channel */
5522 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5523 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5524 if (status && tbl->slots == NULL)
5525 /* Fore and back channel share a connection so get
5526 * both slot tables or neither */
5527 nfs4_destroy_slot_tables(ses);
f8625a6a 5528 return status;
557134a3
AA		 5529}
5530
5531struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5532{
5533 struct nfs4_session *session;
5534 struct nfs4_slot_table *tbl;
5535
8535b2be 5536 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5537 if (!session)
5538 return NULL;
76db6d95 5539
557134a3 5540 tbl = &session->fc_slot_table;
45d43c29 5541 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5542 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5543 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5544 init_completion(&tbl->complete);
f8625a6a
RL		 5545
5546 tbl = &session->bc_slot_table;
45d43c29 5547 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5548 spin_lock_init(&tbl->slot_tbl_lock);
5549 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5550 init_completion(&tbl->complete);
f8625a6a 5551
1055d76d
TM		 5552 session->session_state = 1<<NFS4_SESSION_INITING;
5553
557134a3
AA		 5554 session->clp = clp;
5555 return session;
5556}
5557
5558void nfs4_destroy_session(struct nfs4_session *session)
5559{
2446ab60 5560 struct rpc_xprt *xprt;
848f5bda 5561 struct rpc_cred *cred;
2446ab60 5562
848f5bda
TM		 5563 cred = nfs4_get_exchange_id_cred(session->clp);
5564 nfs4_proc_destroy_session(session, cred);
5565 if (cred)
5566 put_rpccred(cred);
2446ab60
TM		 5567
5568 rcu_read_lock();
5569 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5570 rcu_read_unlock();
5a0ffe54 5571 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5572 __func__, xprt);
5573 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5574 nfs4_destroy_slot_tables(session);
557134a3
AA		 5575 kfree(session);
5576}
5577
fc931582
AA		 5578/*
5579 * Initialize the values to be used by the client in CREATE_SESSION
5580 * If nfs4_init_session set the fore channel request and response sizes,
5581 * use them.
5582 *
5583 * Set the back channel max_resp_sz_cached to zero to force the client to
5584 * always set csa_cachethis to FALSE because the current implementation
5585 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5586 */
5587static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5588{
5589 struct nfs4_session *session = args->client->cl_session;
5590 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5591 mxresp_sz = session->fc_attrs.max_resp_sz;
5592
5593 if (mxrqst_sz == 0)
5594 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5595 if (mxresp_sz == 0)
5596 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5597 /* Fore channel attributes */
fc931582
AA		 5598 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5599 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5600 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5601 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5602
5603 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5604 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5605 __func__,
5606 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5607 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5608
5609 /* Back channel attributes */
fc931582
AA		 5610 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5611 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5612 args->bc_attrs.max_resp_sz_cached = 0;
5613 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5614 args->bc_attrs.max_reqs = 1;
5615
5616 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5617 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5618 __func__,
5619 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5620 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5621 args->bc_attrs.max_reqs);
5622}
5623
43c2e885 5624static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5625{
43c2e885
BF		 5626 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5627 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5628
43c2e885
BF		 5629 if (rcvd->max_resp_sz > sent->max_resp_sz)
5630 return -EINVAL;
5631 /*
5632 * Our requested max_ops is the minimum we need; we're not
5633 * prepared to break up compounds into smaller pieces than that.
5634 * So, no point even trying to continue if the server won't
5635 * cooperate:
5636 */
5637 if (rcvd->max_ops < sent->max_ops)
5638 return -EINVAL;
5639 if (rcvd->max_reqs == 0)
5640 return -EINVAL;
b4b9a0c1
VG		 5641 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5642 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5643 return 0;
8d35301d
AA		 5644}
5645
43c2e885
BF		 5646static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5647{
5648 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5649 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5650
43c2e885
BF		 5651 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5652 return -EINVAL;
5653 if (rcvd->max_resp_sz < sent->max_resp_sz)
5654 return -EINVAL;
5655 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5656 return -EINVAL;
5657 /* These would render the backchannel useless: */
b4b9a0c1 5658 if (rcvd->max_ops != sent->max_ops)
43c2e885 5659 return -EINVAL;
b4b9a0c1 5660 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5661 return -EINVAL;
5662 return 0;
5663}
8d35301d 5664
8d35301d
AA		 5665static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5666 struct nfs4_session *session)
5667{
43c2e885 5668 int ret;
8d35301d 5669
43c2e885
BF		 5670 ret = nfs4_verify_fore_channel_attrs(args, session);
5671 if (ret)
5672 return ret;
5673 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5674}
5675
848f5bda
TM		 5676static int _nfs4_proc_create_session(struct nfs_client *clp,
5677 struct rpc_cred *cred)
fc931582
AA		 5678{
5679 struct nfs4_session *session = clp->cl_session;
5680 struct nfs41_create_session_args args = {
5681 .client = clp,
5682 .cb_program = NFS4_CALLBACK,
5683 };
5684 struct nfs41_create_session_res res = {
5685 .client = clp,
5686 };
5687 struct rpc_message msg = {
5688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5689 .rpc_argp = &args,
5690 .rpc_resp = &res,
848f5bda 5691 .rpc_cred = cred,
fc931582
AA		 5692 };
5693 int status;
5694
5695 nfs4_init_channel_attrs(&args);
0f91421e 5696 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5697
1bd714f2 5698 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5699
8d35301d
AA		 5700 if (!status)
5701 /* Verify the session's negotiated channel_attrs values */
5702 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5703 if (!status) {
5704 /* Increment the clientid slot sequence id */
5705 clp->cl_seqid++;
5706 }
5707
5708 return status;
5709}
5710
5711/*
5712 * Issues a CREATE_SESSION operation to the server.
5713 * It is the responsibility of the caller to verify the session is
5714 * expired before calling this routine.
5715 */
848f5bda 5716int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5717{
5718 int status;
5719 unsigned *ptr;
fc931582
AA		 5720 struct nfs4_session *session = clp->cl_session;
5721
5722 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5723
848f5bda 5724 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5725 if (status)
5726 goto out;
5727
aacd5537
AA		 5728 /* Init or reset the session slot tables */
5729 status = nfs4_setup_session_slot_tables(session);
5730 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5731 if (status)
5732 goto out;
5733
5734 ptr = (unsigned *)&session->sess_id.data[0];
5735 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5736 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5737out:
5738 dprintk("<-- %s\n", __func__);
5739 return status;
5740}
5741
0f3e66c6
AA		 5742/*
5743 * Issue the over-the-wire RPC DESTROY_SESSION.
5744 * The caller must serialize access to this routine.
5745 */
848f5bda
TM		 5746int nfs4_proc_destroy_session(struct nfs4_session *session,
5747 struct rpc_cred *cred)
0f3e66c6 5748{
848f5bda
TM		 5749 struct rpc_message msg = {
5750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5751 .rpc_argp = session,
5752 .rpc_cred = cred,
5753 };
0f3e66c6 5754 int status = 0;
0f3e66c6
AA		 5755
5756 dprintk("--> nfs4_proc_destroy_session\n");
5757
5758 /* session is still being setup */
5759 if (session->clp->cl_cons_state != NFS_CS_READY)
5760 return status;
5761
1bd714f2 5762 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5763
5764 if (status)
08106ac7 5765 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5766 "Session has been destroyed regardless...\n", status);
5767
5768 dprintk("<-- nfs4_proc_destroy_session\n");
5769 return status;
5770}
5771
7b38c368
TM		 5772/*
5773 * With sessions, the client is not marked ready until after a
5774 * successful EXCHANGE_ID and CREATE_SESSION.
5775 *
5776 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5777 * other versions of NFS can be tried.
5778 */
5779static int nfs41_check_session_ready(struct nfs_client *clp)
5780{
5781 int ret;
5782
5783 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5784 ret = nfs4_client_recover_expired_lease(clp);
5785 if (ret)
5786 return ret;
5787 }
5788 if (clp->cl_cons_state < NFS_CS_READY)
5789 return -EPROTONOSUPPORT;
54ac471c 5790 smp_rmb();
7b38c368
TM		 5791 return 0;
5792}
5793
fccba804
TM		 5794int nfs4_init_session(struct nfs_server *server)
5795{
5796 struct nfs_client *clp = server->nfs_client;
2449ea2e 5797 struct nfs4_session *session;
68bf05ef 5798 unsigned int rsize, wsize;
fccba804
TM		 5799
5800 if (!nfs4_has_session(clp))
5801 return 0;
5802
1055d76d 5803 session = clp->cl_session;
7b38c368
TM		 5804 spin_lock(&clp->cl_lock);
5805 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5806
7b38c368
TM		 5807 rsize = server->rsize;
5808 if (rsize == 0)
5809 rsize = NFS_MAX_FILE_IO_SIZE;
5810 wsize = server->wsize;
5811 if (wsize == 0)
5812 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5813
7b38c368
TM		 5814 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5815 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5816 }
5817 spin_unlock(&clp->cl_lock);
2449ea2e 5818
7b38c368 5819 return nfs41_check_session_ready(clp);
fccba804
TM		 5820}
5821
7b38c368 5822int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5823{
5824 struct nfs4_session *session = clp->cl_session;
5825 int ret;
5826
7b38c368
TM		 5827 spin_lock(&clp->cl_lock);
5828 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5829 /*
5830 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5831 * DS lease to be equal to the MDS lease.
5832 */
5833 clp->cl_lease_time = lease_time;
5834 clp->cl_last_renewal = jiffies;
5835 }
5836 spin_unlock(&clp->cl_lock);
d83217c1 5837
7b38c368
TM		 5838 ret = nfs41_check_session_ready(clp);
5839 if (ret)
5840 return ret;
5841 /* Test for the DS role */
5842 if (!is_ds_client(clp))
5843 return -ENODEV;
5844 return 0;
d83217c1
AA		 5845}
5846EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5847
5848
fc01cea9
AA		 5849/*
5850 * Renew the cl_session lease.
5851 */
d5f8d3fe
TM		 5852struct nfs4_sequence_data {
5853 struct nfs_client *clp;
5854 struct nfs4_sequence_args args;
5855 struct nfs4_sequence_res res;
5856};
5857
dc96aef9
AB		 5858static void nfs41_sequence_release(void *data)
5859{
d5f8d3fe
TM		 5860 struct nfs4_sequence_data *calldata = data;
5861 struct nfs_client *clp = calldata->clp;
dc96aef9 5862
7135840f
AB		 5863 if (atomic_read(&clp->cl_count) > 1)
5864 nfs4_schedule_state_renewal(clp);
5865 nfs_put_client(clp);
d5f8d3fe 5866 kfree(calldata);
dc96aef9
AB		 5867}
5868
aa5190d0
TM		 5869static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5870{
5871 switch(task->tk_status) {
5872 case -NFS4ERR_DELAY:
aa5190d0
TM		 5873 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5874 return -EAGAIN;
5875 default:
0400a6b0 5876 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5877 }
5878 return 0;
5879}
5880
dc96aef9 5881static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5882{
d5f8d3fe
TM		 5883 struct nfs4_sequence_data *calldata = data;
5884 struct nfs_client *clp = calldata->clp;
fc01cea9 5885
14516c3a
TM		 5886 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5887 return;
fc01cea9
AA		 5888
5889 if (task->tk_status < 0) {
5890 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5891 if (atomic_read(&clp->cl_count) == 1)
5892 goto out;
fc01cea9 5893
aa5190d0
TM		 5894 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5895 rpc_restart_call_prepare(task);
fc01cea9
AA		 5896 return;
5897 }
5898 }
fc01cea9 5899 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5900out:
fc01cea9
AA		 5901 dprintk("<-- %s\n", __func__);
5902}
5903
5904static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5905{
d5f8d3fe
TM		 5906 struct nfs4_sequence_data *calldata = data;
5907 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5908 struct nfs4_sequence_args *args;
5909 struct nfs4_sequence_res *res;
5910
fc01cea9
AA		 5911 args = task->tk_msg.rpc_argp;
5912 res = task->tk_msg.rpc_resp;
5913
9d12b216 5914 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5915 return;
5916 rpc_call_start(task);
5917}
5918
5919static const struct rpc_call_ops nfs41_sequence_ops = {
5920 .rpc_call_done = nfs41_sequence_call_done,
5921 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5922 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5923};
5924
71ac6da9 5925static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5926{
d5f8d3fe 5927 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5928 struct rpc_message msg = {
5929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5930 .rpc_cred = cred,
5931 };
71ac6da9
TM		 5932 struct rpc_task_setup task_setup_data = {
5933 .rpc_client = clp->cl_rpcclient,
5934 .rpc_message = &msg,
5935 .callback_ops = &nfs41_sequence_ops,
5936 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5937 };
fc01cea9 5938
7135840f 5939 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5940 return ERR_PTR(-EIO);
dfb4f309 5941 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5942 if (calldata == NULL) {
7135840f 5943 nfs_put_client(clp);
71ac6da9 5944 return ERR_PTR(-ENOMEM);
fc01cea9 5945 }
9d12b216 5946 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5947 msg.rpc_argp = &calldata->args;
5948 msg.rpc_resp = &calldata->res;
5949 calldata->clp = clp;
71ac6da9 5950 task_setup_data.callback_data = calldata;
fc01cea9 5951
71ac6da9
TM		 5952 return rpc_run_task(&task_setup_data);
5953}
5954
2f60ea6b 5955static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5956{
5957 struct rpc_task *task;
5958 int ret = 0;
5959
2f60ea6b
TM		 5960 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5961 return 0;
71ac6da9
TM		 5962 task = _nfs41_proc_sequence(clp, cred);
5963 if (IS_ERR(task))
5964 ret = PTR_ERR(task);
5965 else
bf294b41 5966 rpc_put_task_async(task);
71ac6da9
TM		 5967 dprintk("<-- %s status=%d\n", __func__, ret);
5968 return ret;
5969}
5970
5971static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5972{
5973 struct rpc_task *task;
5974 int ret;
5975
5976 task = _nfs41_proc_sequence(clp, cred);
5977 if (IS_ERR(task)) {
5978 ret = PTR_ERR(task);
5979 goto out;
5980 }
5981 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5982 if (!ret) {
5983 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5984
5985 if (task->tk_status == 0)
5986 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5987 ret = task->tk_status;
b4410c2f 5988 }
71ac6da9
TM		 5989 rpc_put_task(task);
5990out:
5991 dprintk("<-- %s status=%d\n", __func__, ret);
5992 return ret;
fc01cea9
AA		 5993}
5994
fce5c838
RL		 5995struct nfs4_reclaim_complete_data {
5996 struct nfs_client *clp;
5997 struct nfs41_reclaim_complete_args arg;
5998 struct nfs41_reclaim_complete_res res;
5999};
6000
6001static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6002{
6003 struct nfs4_reclaim_complete_data *calldata = data;
6004
b257957e 6005 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6006 if (nfs41_setup_sequence(calldata->clp->cl_session,
6007 &calldata->arg.seq_args,
9d12b216 6008 &calldata->res.seq_res, task))
fce5c838
RL		 6009 return;
6010
6011 rpc_call_start(task);
6012}
6013
aa5190d0
TM		 6014static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6015{
6016 switch(task->tk_status) {
6017 case 0:
6018 case -NFS4ERR_COMPLETE_ALREADY:
6019 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6020 break;
6021 case -NFS4ERR_DELAY:
aa5190d0 6022 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6023 /* fall through */
6024 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6025 return -EAGAIN;
6026 default:
0400a6b0 6027 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6028 }
6029 return 0;
6030}
6031
fce5c838
RL		 6032static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6033{
6034 struct nfs4_reclaim_complete_data *calldata = data;
6035 struct nfs_client *clp = calldata->clp;
6036 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6037
6038 dprintk("--> %s\n", __func__);
14516c3a
TM		 6039 if (!nfs41_sequence_done(task, res))
6040 return;
fce5c838 6041
aa5190d0
TM		 6042 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6043 rpc_restart_call_prepare(task);
6044 return;
6045 }
fce5c838
RL		 6046 dprintk("<-- %s\n", __func__);
6047}
6048
6049static void nfs4_free_reclaim_complete_data(void *data)
6050{
6051 struct nfs4_reclaim_complete_data *calldata = data;
6052
6053 kfree(calldata);
6054}
6055
6056static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6057 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6058 .rpc_call_done = nfs4_reclaim_complete_done,
6059 .rpc_release = nfs4_free_reclaim_complete_data,
6060};
6061
6062/*
6063 * Issue a global reclaim complete.
6064 */
6065static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6066{
6067 struct nfs4_reclaim_complete_data *calldata;
6068 struct rpc_task *task;
6069 struct rpc_message msg = {
6070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6071 };
6072 struct rpc_task_setup task_setup_data = {
6073 .rpc_client = clp->cl_rpcclient,
6074 .rpc_message = &msg,
6075 .callback_ops = &nfs4_reclaim_complete_call_ops,
6076 .flags = RPC_TASK_ASYNC,
6077 };
6078 int status = -ENOMEM;
6079
6080 dprintk("--> %s\n", __func__);
8535b2be 6081 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6082 if (calldata == NULL)
6083 goto out;
6084 calldata->clp = clp;
6085 calldata->arg.one_fs = 0;
fce5c838 6086
9d12b216 6087 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6088 msg.rpc_argp = &calldata->arg;
6089 msg.rpc_resp = &calldata->res;
6090 task_setup_data.callback_data = calldata;
6091 task = rpc_run_task(&task_setup_data);
acf82b85 6092 if (IS_ERR(task)) {
fce5c838 6093 status = PTR_ERR(task);
acf82b85
DC		 6094 goto out;
6095 }
c34c32ea
AA		 6096 status = nfs4_wait_for_completion_rpc_task(task);
6097 if (status == 0)
6098 status = task->tk_status;
fce5c838 6099 rpc_put_task(task);
acf82b85 6100 return 0;
fce5c838
RL		 6101out:
6102 dprintk("<-- %s status=%d\n", __func__, status);
6103 return status;
6104}
b1f69b75
AA		 6105
6106static void
6107nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6108{
6109 struct nfs4_layoutget *lgp = calldata;
c31663d4 6110 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6111
6112 dprintk("--> %s\n", __func__);
c31663d4
FI		 6113 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6114 * right now covering the LAYOUTGET we are about to send.
6115 * However, that is not so catastrophic, and there seems
6116 * to be no way to prevent it completely.
6117 */
b1f69b75 6118 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6119 &lgp->res.seq_res, task))
b1f69b75 6120 return;
cf7d63f1
FI		 6121 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6122 NFS_I(lgp->args.inode)->layout,
6123 lgp->args.ctx->state)) {
6124 rpc_exit(task, NFS4_OK);
6125 return;
6126 }
b1f69b75
AA		 6127 rpc_call_start(task);
6128}
6129
6130static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6131{
6132 struct nfs4_layoutget *lgp = calldata;
6133 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6134
6135 dprintk("--> %s\n", __func__);
6136
6137 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6138 return;
6139
6140 switch (task->tk_status) {
6141 case 0:
6142 break;
6143 case -NFS4ERR_LAYOUTTRYLATER:
6144 case -NFS4ERR_RECALLCONFLICT:
6145 task->tk_status = -NFS4ERR_DELAY;
6146 /* Fall through */
6147 default:
6148 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6149 rpc_restart_call_prepare(task);
6150 return;
6151 }
6152 }
b1f69b75
AA		 6153 dprintk("<-- %s\n", __func__);
6154}
6155
6156static void nfs4_layoutget_release(void *calldata)
6157{
6158 struct nfs4_layoutget *lgp = calldata;
6159
6160 dprintk("--> %s\n", __func__);
b1f69b75
AA		 6161 put_nfs_open_context(lgp->args.ctx);
6162 kfree(calldata);
6163 dprintk("<-- %s\n", __func__);
6164}
6165
6166static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6167 .rpc_call_prepare = nfs4_layoutget_prepare,
6168 .rpc_call_done = nfs4_layoutget_done,
6169 .rpc_release = nfs4_layoutget_release,
6170};
6171
6172int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6173{
6174 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6175 struct rpc_task *task;
6176 struct rpc_message msg = {
6177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6178 .rpc_argp = &lgp->args,
6179 .rpc_resp = &lgp->res,
6180 };
6181 struct rpc_task_setup task_setup_data = {
6182 .rpc_client = server->client,
6183 .rpc_message = &msg,
6184 .callback_ops = &nfs4_layoutget_call_ops,
6185 .callback_data = lgp,
6186 .flags = RPC_TASK_ASYNC,
6187 };
6188 int status = 0;
6189
6190 dprintk("--> %s\n", __func__);
6191
35124a09 6192 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6193 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6194 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6195 task = rpc_run_task(&task_setup_data);
6196 if (IS_ERR(task))
6197 return PTR_ERR(task);
6198 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6199 if (status == 0)
6200 status = task->tk_status;
6201 if (status == 0)
6202 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6203 rpc_put_task(task);
6204 dprintk("<-- %s status=%d\n", __func__, status);
6205 return status;
6206}
6207
cbe82603
BH		 6208static void
6209nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6210{
6211 struct nfs4_layoutreturn *lrp = calldata;
6212
6213 dprintk("--> %s\n", __func__);
6214 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6215 &lrp->res.seq_res, task))
cbe82603
BH		 6216 return;
6217 rpc_call_start(task);
6218}
6219
6220static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6221{
6222 struct nfs4_layoutreturn *lrp = calldata;
6223 struct nfs_server *server;
a56aaa02 6224 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6225
6226 dprintk("--> %s\n", __func__);
6227
6228 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6229 return;
6230
6231 server = NFS_SERVER(lrp->args.inode);
6232 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6233 rpc_restart_call_prepare(task);
cbe82603
BH		 6234 return;
6235 }
a2e1d4f2 6236 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6237 if (task->tk_status == 0) {
cbe82603 6238 if (lrp->res.lrs_present) {
cbe82603 6239 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6240 } else
6241 BUG_ON(!list_empty(&lo->plh_segs));
6242 }
a2e1d4f2
FI		 6243 lo->plh_block_lgets--;
6244 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6245 dprintk("<-- %s\n", __func__);
6246}
6247
6248static void nfs4_layoutreturn_release(void *calldata)
6249{
6250 struct nfs4_layoutreturn *lrp = calldata;
6251
6252 dprintk("--> %s\n", __func__);
a56aaa02 6253 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6254 kfree(calldata);
6255 dprintk("<-- %s\n", __func__);
6256}
6257
6258static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6259 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6260 .rpc_call_done = nfs4_layoutreturn_done,
6261 .rpc_release = nfs4_layoutreturn_release,
6262};
6263
6264int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6265{
6266 struct rpc_task *task;
6267 struct rpc_message msg = {
6268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6269 .rpc_argp = &lrp->args,
6270 .rpc_resp = &lrp->res,
6271 };
6272 struct rpc_task_setup task_setup_data = {
6273 .rpc_client = lrp->clp->cl_rpcclient,
6274 .rpc_message = &msg,
6275 .callback_ops = &nfs4_layoutreturn_call_ops,
6276 .callback_data = lrp,
6277 };
6278 int status;
6279
6280 dprintk("--> %s\n", __func__);
9d12b216 6281 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6282 task = rpc_run_task(&task_setup_data);
6283 if (IS_ERR(task))
6284 return PTR_ERR(task);
6285 status = task->tk_status;
6286 dprintk("<-- %s status=%d\n", __func__, status);
6287 rpc_put_task(task);
6288 return status;
6289}
6290
7f11d8d3
AA		 6291/*
6292 * Retrieve the list of Data Server devices from the MDS.
6293 */
6294static int _nfs4_getdevicelist(struct nfs_server *server,
6295 const struct nfs_fh *fh,
6296 struct pnfs_devicelist *devlist)
6297{
6298 struct nfs4_getdevicelist_args args = {
6299 .fh = fh,
6300 .layoutclass = server->pnfs_curr_ld->id,
6301 };
6302 struct nfs4_getdevicelist_res res = {
6303 .devlist = devlist,
6304 };
6305 struct rpc_message msg = {
6306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6307 .rpc_argp = &args,
6308 .rpc_resp = &res,
6309 };
6310 int status;
6311
6312 dprintk("--> %s\n", __func__);
6313 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6314 &res.seq_res, 0);
6315 dprintk("<-- %s status=%d\n", __func__, status);
6316 return status;
6317}
6318
6319int nfs4_proc_getdevicelist(struct nfs_server *server,
6320 const struct nfs_fh *fh,
6321 struct pnfs_devicelist *devlist)
6322{
6323 struct nfs4_exception exception = { };
6324 int err;
6325
6326 do {
6327 err = nfs4_handle_exception(server,
6328 _nfs4_getdevicelist(server, fh, devlist),
6329 &exception);
6330 } while (exception.retry);
6331
6332 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6333 err, devlist->num_devs);
6334
6335 return err;
6336}
6337EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6338
b1f69b75
AA		 6339static int
6340_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6341{
6342 struct nfs4_getdeviceinfo_args args = {
6343 .pdev = pdev,
6344 };
6345 struct nfs4_getdeviceinfo_res res = {
6346 .pdev = pdev,
6347 };
6348 struct rpc_message msg = {
6349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6350 .rpc_argp = &args,
6351 .rpc_resp = &res,
6352 };
6353 int status;
6354
6355 dprintk("--> %s\n", __func__);
7c513058 6356 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6357 dprintk("<-- %s status=%d\n", __func__, status);
6358
6359 return status;
6360}
6361
6362int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6363{
6364 struct nfs4_exception exception = { };
6365 int err;
6366
6367 do {
6368 err = nfs4_handle_exception(server,
6369 _nfs4_proc_getdeviceinfo(server, pdev),
6370 &exception);
6371 } while (exception.retry);
6372 return err;
6373}
6374EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6375
863a3c6c
AA		 6376static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6377{
6378 struct nfs4_layoutcommit_data *data = calldata;
6379 struct nfs_server *server = NFS_SERVER(data->args.inode);
6380
6381 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6382 &data->res.seq_res, task))
863a3c6c
AA		 6383 return;
6384 rpc_call_start(task);
6385}
6386
6387static void
6388nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6389{
6390 struct nfs4_layoutcommit_data *data = calldata;
6391 struct nfs_server *server = NFS_SERVER(data->args.inode);
6392
6393 if (!nfs4_sequence_done(task, &data->res.seq_res))
6394 return;
6395
6396 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6397 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6398 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6399 case -NFS4ERR_BADLAYOUT: /* no layout */
6400 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6401 task->tk_status = 0;
e59d27e0
TM		 6402 break;
6403 case 0:
863a3c6c
AA		 6404 nfs_post_op_update_inode_force_wcc(data->args.inode,
6405 data->res.fattr);
e59d27e0
TM		 6406 break;
6407 default:
6408 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6409 rpc_restart_call_prepare(task);
6410 return;
6411 }
6412 }
863a3c6c
AA		 6413}
6414
6415static void nfs4_layoutcommit_release(void *calldata)
6416{
6417 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6418 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6419 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6420
db29c089 6421 pnfs_cleanup_layoutcommit(data);
863a3c6c 6422 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6423 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6424 list_del_init(&lseg->pls_lc_list);
6425 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6426 &lseg->pls_flags))
6427 put_lseg(lseg);
6428 }
92407e75
PT		 6429
6430 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6431 smp_mb__after_clear_bit();
6432 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6433
863a3c6c
AA		 6434 put_rpccred(data->cred);
6435 kfree(data);
6436}
6437
6438static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6439 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6440 .rpc_call_done = nfs4_layoutcommit_done,
6441 .rpc_release = nfs4_layoutcommit_release,
6442};
6443
6444int
ef311537 6445nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6446{
6447 struct rpc_message msg = {
6448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6449 .rpc_argp = &data->args,
6450 .rpc_resp = &data->res,
6451 .rpc_cred = data->cred,
6452 };
6453 struct rpc_task_setup task_setup_data = {
6454 .task = &data->task,
6455 .rpc_client = NFS_CLIENT(data->args.inode),
6456 .rpc_message = &msg,
6457 .callback_ops = &nfs4_layoutcommit_ops,
6458 .callback_data = data,
6459 .flags = RPC_TASK_ASYNC,
6460 };
6461 struct rpc_task *task;
6462 int status = 0;
6463
6464 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6465 "lbw: %llu inode %lu\n",
6466 data->task.tk_pid, sync,
6467 data->args.lastbytewritten,
6468 data->args.inode->i_ino);
6469
9d12b216 6470 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6471 task = rpc_run_task(&task_setup_data);
6472 if (IS_ERR(task))
6473 return PTR_ERR(task);
ef311537 6474 if (sync == false)
863a3c6c
AA		 6475 goto out;
6476 status = nfs4_wait_for_completion_rpc_task(task);
6477 if (status != 0)
6478 goto out;
6479 status = task->tk_status;
6480out:
6481 dprintk("%s: status %d\n", __func__, status);
6482 rpc_put_task(task);
6483 return status;
6484}
fca78d6d
BS		 6485
6486static int
6487_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6488 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6489{
6490 struct nfs41_secinfo_no_name_args args = {
6491 .style = SECINFO_STYLE_CURRENT_FH,
6492 };
6493 struct nfs4_secinfo_res res = {
6494 .flavors = flavors,
6495 };
6496 struct rpc_message msg = {
6497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6498 .rpc_argp = &args,
6499 .rpc_resp = &res,
6500 };
6501 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6502}
6503
6504static int
6505nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6506 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6507{
6508 struct nfs4_exception exception = { };
6509 int err;
6510 do {
6511 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6512 switch (err) {
6513 case 0:
6514 case -NFS4ERR_WRONGSEC:
6515 case -NFS4ERR_NOTSUPP:
05e9cfb4 6516 goto out;
fca78d6d
BS		 6517 default:
6518 err = nfs4_handle_exception(server, err, &exception);
6519 }
6520 } while (exception.retry);
05e9cfb4 6521out:
fca78d6d
BS		 6522 return err;
6523}
6524
6525static int
6526nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6527 struct nfs_fsinfo *info)
6528{
6529 int err;
6530 struct page *page;
6531 rpc_authflavor_t flavor;
6532 struct nfs4_secinfo_flavors *flavors;
6533
6534 page = alloc_page(GFP_KERNEL);
6535 if (!page) {
6536 err = -ENOMEM;
6537 goto out;
6538 }
6539
6540 flavors = page_address(page);
6541 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6542
6543 /*
6544 * Fall back on "guess and check" method if
6545 * the server doesn't support SECINFO_NO_NAME
6546 */
6547 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6548 err = nfs4_find_root_sec(server, fhandle, info);
6549 goto out_freepage;
6550 }
6551 if (err)
6552 goto out_freepage;
6553
6554 flavor = nfs_find_best_sec(flavors);
6555 if (err == 0)
6556 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6557
6558out_freepage:
6559 put_page(page);
6560 if (err == -EACCES)
6561 return -EPERM;
6562out:
6563 return err;
6564}
1cab0652
BS		 6565
6566static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6567{
6568 int status;
6569 struct nfs41_test_stateid_args args = {
1cab0652 6570 .stateid = stateid,
7d974794
BS		 6571 };
6572 struct nfs41_test_stateid_res res;
6573 struct rpc_message msg = {
6574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6575 .rpc_argp = &args,
6576 .rpc_resp = &res,
6577 };
1cab0652 6578
9d12b216 6579 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6580 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6581
6582 if (status == NFS_OK)
6583 return res.status;
7d974794
BS		 6584 return status;
6585}
6586
1cab0652 6587static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6588{
6589 struct nfs4_exception exception = { };
6590 int err;
6591 do {
6592 err = nfs4_handle_exception(server,
1cab0652 6593 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6594 &exception);
6595 } while (exception.retry);
6596 return err;
6597}
9aeda35f 6598
1cab0652 6599static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6600{
9aeda35f 6601 struct nfs41_free_stateid_args args = {
1cab0652 6602 .stateid = stateid,
9aeda35f
BS		 6603 };
6604 struct nfs41_free_stateid_res res;
6605 struct rpc_message msg = {
6606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6607 .rpc_argp = &args,
6608 .rpc_resp = &res,
6609 };
6610
9d12b216
TM		 6611 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6612 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6613}
6614
1cab0652 6615static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6616{
6617 struct nfs4_exception exception = { };
6618 int err;
6619 do {
6620 err = nfs4_handle_exception(server,
1cab0652 6621 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6622 &exception);
6623 } while (exception.retry);
6624 return err;
6625}
36281caa
TM		 6626
6627static bool nfs41_match_stateid(const nfs4_stateid *s1,
6628 const nfs4_stateid *s2)
6629{
2d2f24ad 6630 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6631 return false;
6632
2d2f24ad 6633 if (s1->seqid == s2->seqid)
36281caa 6634 return true;
2d2f24ad 6635 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6636 return true;
6637
6638 return false;
6639}
6640
557134a3
AA		 6641#endif /* CONFIG_NFS_V4_1 */
6642
36281caa
TM		 6643static bool nfs4_match_stateid(const nfs4_stateid *s1,
6644 const nfs4_stateid *s2)
6645{
f597c537 6646 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6647}
6648
6649
17280175 6650static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6651 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6652 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6653 .recover_open = nfs4_open_reclaim,
6654 .recover_lock = nfs4_lock_reclaim,
591d71cb 6655 .establish_clid = nfs4_init_clientid,
90a16617 6656 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6657};
6658
591d71cb 6659#if defined(CONFIG_NFS_V4_1)
17280175 6660static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6661 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6662 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6663 .recover_open = nfs4_open_reclaim,
6664 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6665 .establish_clid = nfs41_init_clientid,
b4b82607 6666 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6667 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6668};
6669#endif /* CONFIG_NFS_V4_1 */
6670
17280175 6671static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6672 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6673 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6674 .recover_open = nfs4_open_expired,
6675 .recover_lock = nfs4_lock_expired,
6676 .establish_clid = nfs4_init_clientid,
90a16617 6677 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6678};
6679
6680#if defined(CONFIG_NFS_V4_1)
17280175 6681static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6682 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6683 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6684 .recover_open = nfs41_open_expired,
6685 .recover_lock = nfs41_lock_expired,
4d643d1d 6686 .establish_clid = nfs41_init_clientid,
b4b82607 6687 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6688};
591d71cb 6689#endif /* CONFIG_NFS_V4_1 */
1da177e4 6690
17280175 6691static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6692 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6693 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6694 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6695};
6696
6697#if defined(CONFIG_NFS_V4_1)
17280175 6698static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6699 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6700 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6701 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6702};
6703#endif
6704
97dc1359
TM		 6705static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6706 .minor_version = 0,
6707 .call_sync = _nfs4_call_sync,
36281caa 6708 .match_stateid = nfs4_match_stateid,
fca78d6d 6709 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6710 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6711 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6712 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6713};
6714
6715#if defined(CONFIG_NFS_V4_1)
6716static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6717 .minor_version = 1,
6718 .call_sync = _nfs4_call_sync_session,
36281caa 6719 .match_stateid = nfs41_match_stateid,
fca78d6d 6720 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6721 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6722 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6723 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6724};
6725#endif
6726
97dc1359
TM		 6727const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6728 [0] = &nfs_v4_0_minor_ops,
6729#if defined(CONFIG_NFS_V4_1)
6730 [1] = &nfs_v4_1_minor_ops,
6731#endif
6732};
6733
92e1d5be 6734static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6735 .permission = nfs_permission,
6736 .getattr = nfs_getattr,
6737 .setattr = nfs_setattr,
64c2ce8b
AK		 6738 .getxattr = generic_getxattr,
6739 .setxattr = generic_setxattr,
6740 .listxattr = generic_listxattr,
6741 .removexattr = generic_removexattr,
6b3b5496
BF		 6742};
6743
509de811 6744const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6745 .version = 4, /* protocol version */
6746 .dentry_ops = &nfs4_dentry_operations,
6747 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6748 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6749 .file_ops = &nfs4_file_operations,
1da177e4 6750 .getroot = nfs4_proc_get_root,
281cad46 6751 .submount = nfs4_submount,
1da177e4
LT		 6752 .getattr = nfs4_proc_getattr,
6753 .setattr = nfs4_proc_setattr,
6754 .lookup = nfs4_proc_lookup,
6755 .access = nfs4_proc_access,
6756 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6757 .create = nfs4_proc_create,
6758 .remove = nfs4_proc_remove,
6759 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6760 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6761 .unlink_done = nfs4_proc_unlink_done,
6762 .rename = nfs4_proc_rename,
d3d4152a 6763 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6764 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6765 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6766 .link = nfs4_proc_link,
6767 .symlink = nfs4_proc_symlink,
6768 .mkdir = nfs4_proc_mkdir,
6769 .rmdir = nfs4_proc_remove,
6770 .readdir = nfs4_proc_readdir,
6771 .mknod = nfs4_proc_mknod,
6772 .statfs = nfs4_proc_statfs,
6773 .fsinfo = nfs4_proc_fsinfo,
6774 .pathconf = nfs4_proc_pathconf,
e9326dca 6775 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6776 .decode_dirent = nfs4_decode_dirent,
6777 .read_setup = nfs4_proc_read_setup,
1abb5088 6778 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6779 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6780 .read_done = nfs4_read_done,
1da177e4 6781 .write_setup = nfs4_proc_write_setup,
57208fa7 6782 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6783 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6784 .write_done = nfs4_write_done,
1da177e4 6785 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6786 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6787 .commit_done = nfs4_commit_done,
1da177e4 6788 .lock = nfs4_proc_lock,
e50a1c2e 6789 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6790 .close_context = nfs4_close_context,
2b484297 6791 .open_context = nfs4_atomic_open,
011e2a7f 6792 .have_delegation = nfs4_have_delegation,
57ec14c5 6793 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6794 .alloc_client = nfs4_alloc_client,
45a52a02 6795 .init_client = nfs4_init_client,
cdb7eced 6796 .free_client = nfs4_free_client,
1da177e4
LT		 6797};
6798
64c2ce8b
AK		 6799static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6800 .prefix = XATTR_NAME_NFSV4_ACL,
6801 .list = nfs4_xattr_list_nfs4_acl,
6802 .get = nfs4_xattr_get_nfs4_acl,
6803 .set = nfs4_xattr_set_nfs4_acl,
6804};
6805
6806const struct xattr_handler *nfs4_xattr_handlers[] = {
6807 &nfs4_xattr_nfs4_acl_handler,
6808 NULL
6809};
6810
ef159e91
TM		 6811module_param(max_session_slots, ushort, 0644);
6812MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6813 "requests the client will negotiate");
6814
1da177e4
LT		 6815/*
6816 * Local variables:
6817 * c-basic-offset: 8
6818 * End:
6819 */
Linux 6.x block layer and io_uring tree(s)