projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS4: Fix open bug when pnfs module blacklisted
[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:
14977489 297 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
3114ea7a
TM		 298 nfs_inode_return_delegation(inode);
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();
1068 nfs_inode_return_delegation(inode);
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
1905 do {
82be417a
AA		 1906 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1907 &res, ctx_th);
1da177e4
LT		 1908 if (status == 0)
1909 break;
1910 /* NOTE: BAD_SEQID means the server and client disagree about the
1911 * book-keeping w.r.t. state-changing operations
1912 * (OPEN/CLOSE/LOCK/LOCKU...)
1913 * It is actually a sign of a bug on the client or on the server.
1914 *
1915 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1916 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1917 * have unhashed the old state_owner for us, and that we can
1918 * therefore safely retry using a new one. We should still warn
1919 * the user though...
1920 */
1921 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1922 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1923 " returned a bad sequence-id error!\n",
1924 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1925 exception.retry = 1;
1926 continue;
1927 }
550f5747
TM		 1928 /*
1929 * BAD_STATEID on OPEN means that the server cancelled our
1930 * state before it received the OPEN_CONFIRM.
1931 * Recover by retrying the request as per the discussion
1932 * on Page 181 of RFC3530.
1933 */
1934 if (status == -NFS4ERR_BAD_STATEID) {
1935 exception.retry = 1;
1936 continue;
1937 }
aac00a8d
TM		 1938 if (status == -EAGAIN) {
1939 /* We must have found a delegation */
1940 exception.retry = 1;
1941 continue;
1942 }
1da177e4
LT		 1943 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1944 status, &exception));
1945 } while (exception.retry);
1946 return res;
1947}
1948
659bfcd6
TM		 1949static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1950 struct nfs_fattr *fattr, struct iattr *sattr,
1951 struct nfs4_state *state)
1da177e4 1952{
3e4f6290 1953 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1954 struct nfs_setattrargs arg = {
3e4f6290 1955 .fh = NFS_FH(inode),
1da177e4
LT		 1956 .iap = sattr,
1957 .server = server,
1958 .bitmask = server->attr_bitmask,
1959 };
1960 struct nfs_setattrres res = {
1961 .fattr = fattr,
1962 .server = server,
1963 };
1964 struct rpc_message msg = {
659bfcd6
TM		 1965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1966 .rpc_argp = &arg,
1967 .rpc_resp = &res,
1968 .rpc_cred = cred,
1da177e4 1969 };
26e976a8 1970 unsigned long timestamp = jiffies;
65e4308d 1971 int status;
1da177e4 1972
0e574af1 1973 nfs_fattr_init(fattr);
1da177e4 1974
4fc8796d
TM		 1975 if (state != NULL) {
1976 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1977 current->files, current->tgid);
1978 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1979 FMODE_WRITE)) {
3e4f6290 1980 /* Use that stateid */
08e9eac4 1981 } else
f597c537 1982 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1983
7c513058 1984 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1985 if (status == 0 && state != NULL)
1986 renew_lease(server, timestamp);
65e4308d 1987 return status;
1da177e4
LT		 1988}
1989
659bfcd6
TM		 1990static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1991 struct nfs_fattr *fattr, struct iattr *sattr,
1992 struct nfs4_state *state)
1da177e4 1993{
3e4f6290 1994 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1995 struct nfs4_exception exception = {
1996 .state = state,
3114ea7a 1997 .inode = inode,
a1d0b5ee 1998 };
1da177e4
LT		 1999 int err;
2000 do {
451146be
TM		 2001 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2002 switch (err) {
2003 case -NFS4ERR_OPENMODE:
2004 if (state && !(state->state & FMODE_WRITE)) {
2005 err = -EBADF;
2006 if (sattr->ia_valid & ATTR_OPEN)
2007 err = -EACCES;
2008 goto out;
2009 }
2010 }
2011 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2012 } while (exception.retry);
451146be 2013out:
1da177e4
LT		 2014 return err;
2015}
2016
2017struct nfs4_closedata {
2018 struct inode *inode;
2019 struct nfs4_state *state;
2020 struct nfs_closeargs arg;
2021 struct nfs_closeres res;
516a6af6 2022 struct nfs_fattr fattr;
26e976a8 2023 unsigned long timestamp;
f7e8917a
FI		 2024 bool roc;
2025 u32 roc_barrier;
1da177e4
LT		 2026};
2027
963d8fe5 2028static void nfs4_free_closedata(void *data)
9512135d 2029{
963d8fe5
TM		 2030 struct nfs4_closedata *calldata = data;
2031 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2032 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2033
f7e8917a
FI		 2034 if (calldata->roc)
2035 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2036 nfs4_put_open_state(calldata->state);
2037 nfs_free_seqid(calldata->arg.seqid);
9512135d 2038 nfs4_put_state_owner(sp);
643168c2 2039 nfs_sb_deactive(sb);
9512135d
TM		 2040 kfree(calldata);
2041}
2042
88069f77
TM		 2043static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2044 fmode_t fmode)
2045{
2046 spin_lock(&state->owner->so_lock);
2047 if (!(fmode & FMODE_READ))
2048 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2049 if (!(fmode & FMODE_WRITE))
2050 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2051 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2052 spin_unlock(&state->owner->so_lock);
2053}
2054
963d8fe5 2055static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2056{
963d8fe5 2057 struct nfs4_closedata *calldata = data;
1da177e4 2058 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2059 struct nfs_server *server = NFS_SERVER(calldata->inode);
2060
a3ca5651 2061 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2062 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2063 return;
1da177e4
LT		 2064 /* hmm. we are done with the inode, and in the process of freeing
2065 * the state_owner. we keep this around to process errors
2066 */
1da177e4
LT		 2067 switch (task->tk_status) {
2068 case 0:
f7e8917a
FI		 2069 if (calldata->roc)
2070 pnfs_roc_set_barrier(state->inode,
2071 calldata->roc_barrier);
45328c35 2072 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2073 renew_lease(server, calldata->timestamp);
88069f77
TM		 2074 nfs4_close_clear_stateid_flags(state,
2075 calldata->arg.fmode);
1da177e4
LT		 2076 break;
2077 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2078 case -NFS4ERR_OLD_STATEID:
2079 case -NFS4ERR_BAD_STATEID:
1da177e4 2080 case -NFS4ERR_EXPIRED:
dc0b027d 2081 if (calldata->arg.fmode == 0)
9e33bed5 2082 break;
1da177e4 2083 default:
72211dbe
TM		 2084 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2085 rpc_restart_call_prepare(task);
1da177e4 2086 }
72211dbe 2087 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2088 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2089 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2090}
2091
4ce70ada 2092static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2093{
4ce70ada 2094 struct nfs4_closedata *calldata = data;
9512135d 2095 struct nfs4_state *state = calldata->state;
88069f77 2096 int call_close = 0;
9512135d 2097
a3ca5651 2098 dprintk("%s: begin!\n", __func__);
963d8fe5 2099 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2100 return;
003707c7 2101
88069f77
TM		 2102 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2103 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2104 spin_lock(&state->owner->so_lock);
003707c7 2105 /* Calculate the change in open mode */
e7616923 2106 if (state->n_rdwr == 0) {
003707c7 2107 if (state->n_rdonly == 0) {
88069f77
TM		 2108 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2109 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2110 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2111 }
2112 if (state->n_wronly == 0) {
88069f77
TM		 2113 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2114 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2115 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2116 }
e7616923 2117 }
4cecb76f 2118 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2119
2120 if (!call_close) {
963d8fe5
TM		 2121 /* Note: exit _without_ calling nfs4_close_done */
2122 task->tk_action = NULL;
a3ca5651 2123 goto out;
9512135d 2124 }
88069f77 2125
f7e8917a 2126 if (calldata->arg.fmode == 0) {
88069f77 2127 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2128 if (calldata->roc &&
2129 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2130 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2131 task, NULL);
a3ca5651 2132 goto out;
f7e8917a
FI		 2133 }
2134 }
88069f77 2135
516a6af6 2136 nfs_fattr_init(calldata->res.fattr);
26e976a8 2137 calldata->timestamp = jiffies;
035168ab 2138 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2139 &calldata->arg.seq_args,
2140 &calldata->res.seq_res,
2141 task))
a3ca5651 2142 goto out;
5138fde0 2143 rpc_call_start(task);
a3ca5651
CL		 2144out:
2145 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2146}
2147
963d8fe5 2148static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2149 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2150 .rpc_call_done = nfs4_close_done,
2151 .rpc_release = nfs4_free_closedata,
2152};
2153
1da177e4
LT		 2154/*
2155 * It is possible for data to be read/written from a mem-mapped file
2156 * after the sys_close call (which hits the vfs layer as a flush).
2157 * This means that we can't safely call nfsv4 close on a file until
2158 * the inode is cleared. This in turn means that we are not good
2159 * NFSv4 citizens - we do not indicate to the server to update the file's
2160 * share state even when we are done with one of the three share
2161 * stateid's in the inode.
2162 *
2163 * NOTE: Caller must be holding the sp->so_owner semaphore!
2164 */
643168c2 2165int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2166{
4a35bd41 2167 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2168 struct nfs4_closedata *calldata;
b39e625b
TM		 2169 struct nfs4_state_owner *sp = state->owner;
2170 struct rpc_task *task;
5138fde0
TM		 2171 struct rpc_message msg = {
2172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2173 .rpc_cred = state->owner->so_cred,
2174 };
c970aa85
TM		 2175 struct rpc_task_setup task_setup_data = {
2176 .rpc_client = server->client,
5138fde0 2177 .rpc_message = &msg,
c970aa85 2178 .callback_ops = &nfs4_close_ops,
101070ca 2179 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2180 .flags = RPC_TASK_ASYNC,
2181 };
9512135d 2182 int status = -ENOMEM;
1da177e4 2183
8535b2be 2184 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2185 if (calldata == NULL)
9512135d 2186 goto out;
9d12b216 2187 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2188 calldata->inode = state->inode;
1da177e4 2189 calldata->state = state;
4a35bd41 2190 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2191 calldata->arg.stateid = &state->open_stateid;
1da177e4 2192 /* Serialization for the sequence id */
8535b2be 2193 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2194 if (calldata->arg.seqid == NULL)
2195 goto out_free_calldata;
dc0b027d 2196 calldata->arg.fmode = 0;
a65318bf 2197 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2198 calldata->res.fattr = &calldata->fattr;
c1d51931 2199 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2200 calldata->res.server = server;
f7e8917a 2201 calldata->roc = roc;
643168c2 2202 nfs_sb_active(calldata->inode->i_sb);
9512135d 2203
1174dd1f
TM		 2204 msg.rpc_argp = &calldata->arg;
2205 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2206 task_setup_data.callback_data = calldata;
2207 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2208 if (IS_ERR(task))
2209 return PTR_ERR(task);
a49c3c77
TM		 2210 status = 0;
2211 if (wait)
2212 status = rpc_wait_for_completion_task(task);
b39e625b 2213 rpc_put_task(task);
a49c3c77 2214 return status;
9512135d
TM		 2215out_free_calldata:
2216 kfree(calldata);
2217out:
f7e8917a
FI		 2218 if (roc)
2219 pnfs_roc_release(state->inode);
b39e625b
TM		 2220 nfs4_put_open_state(state);
2221 nfs4_put_state_owner(sp);
9512135d 2222 return status;
1da177e4
LT		 2223}
2224
2b484297 2225static struct inode *
cd9a1c0e 2226nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2227{
1da177e4 2228 struct nfs4_state *state;
1da177e4 2229
565277f6 2230 /* Protect against concurrent sillydeletes */
82be417a
AA		 2231 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2232 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2233 if (IS_ERR(state))
2234 return ERR_CAST(state);
cd9a1c0e 2235 ctx->state = state;
f46e0bd3 2236 return igrab(state->inode);
1da177e4
LT		 2237}
2238
1185a552 2239static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2240{
2241 if (ctx->state == NULL)
2242 return;
2243 if (is_sync)
643168c2 2244 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2245 else
643168c2 2246 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2247}
1da177e4
LT		 2248
2249static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2250{
43652ad5
BH		 2251 struct nfs4_server_caps_arg args = {
2252 .fhandle = fhandle,
2253 };
1da177e4
LT		 2254 struct nfs4_server_caps_res res = {};
2255 struct rpc_message msg = {
2256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2257 .rpc_argp = &args,
1da177e4
LT		 2258 .rpc_resp = &res,
2259 };
2260 int status;
2261
7c513058 2262 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2263 if (status == 0) {
2264 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2265 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2266 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2267 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2268 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2269 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2270 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2271 server->caps |= NFS_CAP_ACLS;
2272 if (res.has_links != 0)
2273 server->caps |= NFS_CAP_HARDLINKS;
2274 if (res.has_symlinks != 0)
2275 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2276 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2277 server->caps |= NFS_CAP_FILEID;
2278 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2279 server->caps |= NFS_CAP_MODE;
2280 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2281 server->caps |= NFS_CAP_NLINK;
2282 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2283 server->caps |= NFS_CAP_OWNER;
2284 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2285 server->caps |= NFS_CAP_OWNER_GROUP;
2286 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2287 server->caps |= NFS_CAP_ATIME;
2288 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2289 server->caps |= NFS_CAP_CTIME;
2290 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2291 server->caps |= NFS_CAP_MTIME;
2292
a65318bf
TM		 2293 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2294 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2295 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2296 server->acl_bitmask = res.acl_bitmask;
264e6351 2297 server->fh_expire_type = res.fh_expire_type;
1da177e4 2298 }
cccef3b9 2299
1da177e4
LT		 2300 return status;
2301}
2302
55a97593 2303int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2304{
2305 struct nfs4_exception exception = { };
2306 int err;
2307 do {
2308 err = nfs4_handle_exception(server,
2309 _nfs4_server_capabilities(server, fhandle),
2310 &exception);
2311 } while (exception.retry);
2312 return err;
2313}
2314
2315static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2316 struct nfs_fsinfo *info)
2317{
1da177e4
LT		 2318 struct nfs4_lookup_root_arg args = {
2319 .bitmask = nfs4_fattr_bitmap,
2320 };
2321 struct nfs4_lookup_res res = {
2322 .server = server,
0e574af1 2323 .fattr = info->fattr,
1da177e4
LT		 2324 .fh = fhandle,
2325 };
2326 struct rpc_message msg = {
2327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2328 .rpc_argp = &args,
2329 .rpc_resp = &res,
2330 };
008f55d0 2331
0e574af1 2332 nfs_fattr_init(info->fattr);
7c513058 2333 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2334}
2335
2336static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2337 struct nfs_fsinfo *info)
2338{
2339 struct nfs4_exception exception = { };
2340 int err;
2341 do {
fb8a5ba8
BS		 2342 err = _nfs4_lookup_root(server, fhandle, info);
2343 switch (err) {
2344 case 0:
2345 case -NFS4ERR_WRONGSEC:
05e9cfb4 2346 goto out;
fb8a5ba8
BS		 2347 default:
2348 err = nfs4_handle_exception(server, err, &exception);
2349 }
1da177e4 2350 } while (exception.retry);
05e9cfb4 2351out:
1da177e4
LT		 2352 return err;
2353}
2354
8f70e95f
BS		 2355static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2356 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2357{
2358 struct rpc_auth *auth;
2359 int ret;
2360
2361 auth = rpcauth_create(flavor, server->client);
2362 if (!auth) {
2363 ret = -EIO;
2364 goto out;
2365 }
2366 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2367out:
2368 return ret;
2369}
2370
801a16dc 2371static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2372 struct nfs_fsinfo *info)
1da177e4 2373{
8f70e95f 2374 int i, len, status = 0;
0fabee24 2375 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2376
801a16dc
BS		 2377 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2378 flav_array[len] = RPC_AUTH_NULL;
2379 len += 1;
8f70e95f
BS		 2380
2381 for (i = 0; i < len; i++) {
2382 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2383 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2384 continue;
2385 break;
8f70e95f 2386 }
fb8a5ba8
BS		 2387 /*
2388 * -EACCESS could mean that the user doesn't have correct permissions
2389 * to access the mount. It could also mean that we tried to mount
2390 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2391 * existing mount programs don't handle -EACCES very well so it should
2392 * be mapped to -EPERM instead.
2393 */
2394 if (status == -EACCES)
2395 status = -EPERM;
801a16dc
BS		 2396 return status;
2397}
2398
2399/*
2400 * get the file handle for the "/" directory on the server
2401 */
3028eb2b
BS		 2402int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2403 struct nfs_fsinfo *info)
801a16dc 2404{
fca78d6d 2405 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2406 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2407 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2408 /*
2409 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2410 * by nfs4_map_errors() as this function exits.
2411 */
fca78d6d 2412 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2413 if (status == 0)
2414 status = nfs4_server_capabilities(server, fhandle);
2415 if (status == 0)
2416 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2417 return nfs4_map_errors(status);
1da177e4
LT		 2418}
2419
bae36241
BS		 2420static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2421 struct nfs_fsinfo *info)
2422{
2423 int error;
2424 struct nfs_fattr *fattr = info->fattr;
2425
2426 error = nfs4_server_capabilities(server, mntfh);
2427 if (error < 0) {
2428 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2429 return error;
2430 }
2431
2432 error = nfs4_proc_getattr(server, mntfh, fattr);
2433 if (error < 0) {
2434 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2435 return error;
2436 }
2437
2438 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2439 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2440 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2441
2442 return error;
2443}
2444
6b97fd3d
MN		 2445/*
2446 * Get locations and (maybe) other attributes of a referral.
2447 * Note that we'll actually follow the referral later when
2448 * we detect fsid mismatch in inode revalidation
2449 */
f05d147f
BS		 2450static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2451 const struct qstr *name, struct nfs_fattr *fattr,
2452 struct nfs_fh *fhandle)
6b97fd3d
MN		 2453{
2454 int status = -ENOMEM;
2455 struct page *page = NULL;
2456 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2457
2458 page = alloc_page(GFP_KERNEL);
2459 if (page == NULL)
2460 goto out;
2461 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2462 if (locations == NULL)
2463 goto out;
2464
f05d147f 2465 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2466 if (status != 0)
2467 goto out;
2468 /* Make sure server returned a different fsid for the referral */
2469 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2470 dprintk("%s: server did not return a different fsid for"
2471 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2472 status = -EIO;
2473 goto out;
2474 }
533eb461
AA		 2475 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2476 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2477
533eb461 2478 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2479 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2480 memset(fhandle, 0, sizeof(struct nfs_fh));
2481out:
2482 if (page)
2483 __free_page(page);
5d7ca35a 2484 kfree(locations);
6b97fd3d
MN		 2485 return status;
2486}
2487
1da177e4
LT		 2488static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2489{
2490 struct nfs4_getattr_arg args = {
2491 .fh = fhandle,
2492 .bitmask = server->attr_bitmask,
2493 };
2494 struct nfs4_getattr_res res = {
2495 .fattr = fattr,
2496 .server = server,
2497 };
2498 struct rpc_message msg = {
2499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2500 .rpc_argp = &args,
2501 .rpc_resp = &res,
2502 };
2503
0e574af1 2504 nfs_fattr_init(fattr);
7c513058 2505 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2506}
2507
2508static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2509{
2510 struct nfs4_exception exception = { };
2511 int err;
2512 do {
2513 err = nfs4_handle_exception(server,
2514 _nfs4_proc_getattr(server, fhandle, fattr),
2515 &exception);
2516 } while (exception.retry);
2517 return err;
2518}
2519
2520/*
2521 * The file is not closed if it is opened due to the a request to change
2522 * the size of the file. The open call will not be needed once the
2523 * VFS layer lookup-intents are implemented.
2524 *
2525 * Close is called when the inode is destroyed.
2526 * If we haven't opened the file for O_WRONLY, we
2527 * need to in the size_change case to obtain a stateid.
2528 *
2529 * Got race?
2530 * Because OPEN is always done by name in nfsv4, it is
2531 * possible that we opened a different file by the same
2532 * name. We can recognize this race condition, but we
2533 * can't do anything about it besides returning an error.
2534 *
2535 * This will be fixed with VFS changes (lookup-intent).
2536 */
2537static int
2538nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2539 struct iattr *sattr)
2540{
08e9eac4 2541 struct inode *inode = dentry->d_inode;
659bfcd6 2542 struct rpc_cred *cred = NULL;
d530838b 2543 struct nfs4_state *state = NULL;
1da177e4
LT		 2544 int status;
2545
8a1636c4
BH		 2546 if (pnfs_ld_layoutret_on_setattr(inode))
2547 pnfs_return_layout(inode);
2548
0e574af1 2549 nfs_fattr_init(fattr);
1da177e4 2550
d530838b 2551 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2552 if (sattr->ia_valid & ATTR_FILE) {
2553 struct nfs_open_context *ctx;
2554
2555 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2556 if (ctx) {
2557 cred = ctx->cred;
2558 state = ctx->state;
2559 }
659bfcd6 2560 }
08e9eac4 2561
536e43d1
TM		 2562 /* Deal with open(O_TRUNC) */
2563 if (sattr->ia_valid & ATTR_OPEN)
2564 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2565
659bfcd6 2566 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2567 if (status == 0)
2568 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2569 return status;
2570}
2571
0c2e53f1
TM		 2572static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2573 const struct qstr *name, struct nfs_fh *fhandle,
2574 struct nfs_fattr *fattr)
2b3de441 2575{
0c2e53f1 2576 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2577 int status;
2578 struct nfs4_lookup_arg args = {
2579 .bitmask = server->attr_bitmask,
0c2e53f1 2580 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2581 .name = name,
2582 };
2583 struct nfs4_lookup_res res = {
2584 .server = server,
2585 .fattr = fattr,
2586 .fh = fhandle,
2587 };
2588 struct rpc_message msg = {
2589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2590 .rpc_argp = &args,
2591 .rpc_resp = &res,
2592 };
2593
2594 nfs_fattr_init(fattr);
2595
1da177e4 2596 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2597 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2598 dprintk("NFS reply lookup: %d\n", status);
2599 return status;
2600}
2601
72de53ec 2602static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2603{
7ebb9315 2604 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2605 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2606 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2607 fattr->nlink = 2;
2608}
2609
72de53ec
BS		 2610static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2611 struct qstr *name, struct nfs_fh *fhandle,
2612 struct nfs_fattr *fattr)
1da177e4
LT		 2613{
2614 struct nfs4_exception exception = { };
72de53ec 2615 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2616 int err;
2617 do {
72de53ec
BS		 2618 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2619 switch (err) {
08ef7bd3 2620 case -NFS4ERR_BADNAME:
72de53ec
BS		 2621 err = -ENOENT;
2622 goto out;
0c2e53f1 2623 case -NFS4ERR_MOVED:
f05d147f 2624 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2625 goto out;
0c2e53f1 2626 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2627 err = -EPERM;
2628 if (client != *clnt)
2629 goto out;
2630
2631 client = nfs4_create_sec_client(client, dir, name);
2632 if (IS_ERR(client))
2633 return PTR_ERR(client);
2634
2635 exception.retry = 1;
2636 break;
2637 default:
2638 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2639 }
1da177e4 2640 } while (exception.retry);
72de53ec
BS		 2641
2642out:
2643 if (err == 0)
2644 *clnt = client;
2645 else if (client != *clnt)
2646 rpc_shutdown_client(client);
2647
1da177e4
LT		 2648 return err;
2649}
2650
80a16b21 2651static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2652 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2653{
2654 int status;
2655 struct rpc_clnt *client = NFS_CLIENT(dir);
2656
2657 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2658 if (client != NFS_CLIENT(dir)) {
2659 rpc_shutdown_client(client);
2660 nfs_fixup_secinfo_attributes(fattr);
2661 }
2662 return status;
2663}
2664
f05d147f
BS		 2665struct rpc_clnt *
2666nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2667 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2668{
2669 int status;
2670 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2671
2672 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2673 if (status < 0) {
2674 rpc_shutdown_client(client);
2675 return ERR_PTR(status);
2676 }
2677 return client;
2678}
2679
1da177e4
LT		 2680static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2681{
76b32999 2682 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2683 struct nfs4_accessargs args = {
2684 .fh = NFS_FH(inode),
a4980e78 2685 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2686 };
2687 struct nfs4_accessres res = {
2688 .server = server,
1da177e4 2689 };
1da177e4
LT		 2690 struct rpc_message msg = {
2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2692 .rpc_argp = &args,
2693 .rpc_resp = &res,
2694 .rpc_cred = entry->cred,
2695 };
2696 int mode = entry->mask;
2697 int status;
2698
2699 /*
2700 * Determine which access bits we want to ask for...
2701 */
2702 if (mode & MAY_READ)
2703 args.access |= NFS4_ACCESS_READ;
2704 if (S_ISDIR(inode->i_mode)) {
2705 if (mode & MAY_WRITE)
2706 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2707 if (mode & MAY_EXEC)
2708 args.access |= NFS4_ACCESS_LOOKUP;
2709 } else {
2710 if (mode & MAY_WRITE)
2711 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2712 if (mode & MAY_EXEC)
2713 args.access |= NFS4_ACCESS_EXECUTE;
2714 }
c407d41a
TM		 2715
2716 res.fattr = nfs_alloc_fattr();
2717 if (res.fattr == NULL)
2718 return -ENOMEM;
2719
7c513058 2720 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2721 if (!status) {
2722 entry->mask = 0;
2723 if (res.access & NFS4_ACCESS_READ)
2724 entry->mask |= MAY_READ;
2725 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2726 entry->mask |= MAY_WRITE;
2727 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2728 entry->mask |= MAY_EXEC;
c407d41a 2729 nfs_refresh_inode(inode, res.fattr);
1da177e4 2730 }
c407d41a 2731 nfs_free_fattr(res.fattr);
1da177e4
LT		 2732 return status;
2733}
2734
2735static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2736{
2737 struct nfs4_exception exception = { };
2738 int err;
2739 do {
2740 err = nfs4_handle_exception(NFS_SERVER(inode),
2741 _nfs4_proc_access(inode, entry),
2742 &exception);
2743 } while (exception.retry);
2744 return err;
2745}
2746
2747/*
2748 * TODO: For the time being, we don't try to get any attributes
2749 * along with any of the zero-copy operations READ, READDIR,
2750 * READLINK, WRITE.
2751 *
2752 * In the case of the first three, we want to put the GETATTR
2753 * after the read-type operation -- this is because it is hard
2754 * to predict the length of a GETATTR response in v4, and thus
2755 * align the READ data correctly. This means that the GETATTR
2756 * may end up partially falling into the page cache, and we should
2757 * shift it into the 'tail' of the xdr_buf before processing.
2758 * To do this efficiently, we need to know the total length
2759 * of data received, which doesn't seem to be available outside
2760 * of the RPC layer.
2761 *
2762 * In the case of WRITE, we also want to put the GETATTR after
2763 * the operation -- in this case because we want to make sure
2764 * we get the post-operation mtime and size. This means that
2765 * we can't use xdr_encode_pages() as written: we need a variant
2766 * of it which would leave room in the 'tail' iovec.
2767 *
2768 * Both of these changes to the XDR layer would in fact be quite
2769 * minor, but I decided to leave them for a subsequent patch.
2770 */
2771static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2772 unsigned int pgbase, unsigned int pglen)
2773{
2774 struct nfs4_readlink args = {
2775 .fh = NFS_FH(inode),
2776 .pgbase = pgbase,
2777 .pglen = pglen,
2778 .pages = &page,
2779 };
f50c7000 2780 struct nfs4_readlink_res res;
1da177e4
LT		 2781 struct rpc_message msg = {
2782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2783 .rpc_argp = &args,
f50c7000 2784 .rpc_resp = &res,
1da177e4
LT		 2785 };
2786
7c513058 2787 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2788}
2789
2790static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2791 unsigned int pgbase, unsigned int pglen)
2792{
2793 struct nfs4_exception exception = { };
2794 int err;
2795 do {
2796 err = nfs4_handle_exception(NFS_SERVER(inode),
2797 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2798 &exception);
2799 } while (exception.retry);
2800 return err;
2801}
2802
1da177e4
LT		 2803/*
2804 * Got race?
2805 * We will need to arrange for the VFS layer to provide an atomic open.
2806 * Until then, this create/open method is prone to inefficiency and race
2807 * conditions due to the lookup, create, and open VFS calls from sys_open()
2808 * placed on the wire.
2809 *
2810 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2811 * The file will be opened again in the subsequent VFS open call
2812 * (nfs4_proc_file_open).
2813 *
2814 * The open for read will just hang around to be used by any process that
2815 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2816 */
2817
2818static int
2819nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2820 int flags, struct nfs_open_context *ctx)
1da177e4 2821{
82a2c1b7 2822 struct dentry *de = dentry;
1da177e4 2823 struct nfs4_state *state;
c0204fd2
TM		 2824 struct rpc_cred *cred = NULL;
2825 fmode_t fmode = 0;
1da177e4
LT		 2826 int status = 0;
2827
c0204fd2
TM		 2828 if (ctx != NULL) {
2829 cred = ctx->cred;
3d4ff43d 2830 de = ctx->dentry;
c0204fd2 2831 fmode = ctx->mode;
1da177e4 2832 }
a8a5da99 2833 sattr->ia_mode &= ~current_umask();
82be417a 2834 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
d4d9cdcb 2835 d_drop(dentry);
1da177e4
LT		 2836 if (IS_ERR(state)) {
2837 status = PTR_ERR(state);
c0204fd2 2838 goto out;
1da177e4 2839 }
d4d9cdcb 2840 d_add(dentry, igrab(state->inode));
d75340cc 2841 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2842 if (ctx != NULL)
2843 ctx->state = state;
02a913a7 2844 else
643168c2 2845 nfs4_close_sync(state, fmode);
1da177e4
LT		 2846out:
2847 return status;
2848}
2849
2850static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2851{
16e42959 2852 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2853 struct nfs_removeargs args = {
1da177e4 2854 .fh = NFS_FH(dir),
26fe5750 2855 .name = *name,
16e42959 2856 };
4fdc17b2 2857 struct nfs_removeres res = {
16e42959 2858 .server = server,
1da177e4 2859 };
1da177e4 2860 struct rpc_message msg = {
4fdc17b2
TM		 2861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2862 .rpc_argp = &args,
2863 .rpc_resp = &res,
1da177e4 2864 };
778d2817 2865 int status;
1da177e4 2866
7c513058 2867 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2868 if (status == 0)
16e42959 2869 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2870 return status;
2871}
2872
2873static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2874{
2875 struct nfs4_exception exception = { };
2876 int err;
2877 do {
2878 err = nfs4_handle_exception(NFS_SERVER(dir),
2879 _nfs4_proc_remove(dir, name),
2880 &exception);
2881 } while (exception.retry);
2882 return err;
2883}
2884
e4eff1a6 2885static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2886{
e4eff1a6
TM		 2887 struct nfs_server *server = NFS_SERVER(dir);
2888 struct nfs_removeargs *args = msg->rpc_argp;
2889 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2890
e4eff1a6 2891 res->server = server;
1da177e4 2892 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2893 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2894}
2895
34e137cc
BS		 2896static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2897{
2898 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2899 &data->args.seq_args,
2900 &data->res.seq_res,
2901 task))
2902 return;
2903 rpc_call_start(task);
1da177e4
LT		 2904}
2905
e4eff1a6 2906static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2907{
e4eff1a6
TM		 2908 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2909
14516c3a
TM		 2910 if (!nfs4_sequence_done(task, &res->seq_res))
2911 return 0;
9e33bed5 2912 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2913 return 0;
2914 update_changeattr(dir, &res->cinfo);
e4eff1a6 2915 return 1;
1da177e4
LT		 2916}
2917
d3d4152a
JL		 2918static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2919{
2920 struct nfs_server *server = NFS_SERVER(dir);
2921 struct nfs_renameargs *arg = msg->rpc_argp;
2922 struct nfs_renameres *res = msg->rpc_resp;
2923
2924 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2925 res->server = server;
9d12b216 2926 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2927}
2928
c6bfa1a1
BS		 2929static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2930{
2931 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2932 &data->args.seq_args,
2933 &data->res.seq_res,
2934 task))
2935 return;
2936 rpc_call_start(task);
d3d4152a
JL		 2937}
2938
2939static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2940 struct inode *new_dir)
2941{
2942 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2943
2944 if (!nfs4_sequence_done(task, &res->seq_res))
2945 return 0;
2946 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2947 return 0;
2948
2949 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2950 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2951 return 1;
2952}
2953
1da177e4
LT		 2954static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2955 struct inode *new_dir, struct qstr *new_name)
2956{
6caf2c82 2957 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2958 struct nfs_renameargs arg = {
1da177e4
LT		 2959 .old_dir = NFS_FH(old_dir),
2960 .new_dir = NFS_FH(new_dir),
2961 .old_name = old_name,
2962 .new_name = new_name,
6caf2c82 2963 };
e8582a8b 2964 struct nfs_renameres res = {
6caf2c82 2965 .server = server,
1da177e4 2966 };
1da177e4
LT		 2967 struct rpc_message msg = {
2968 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2969 .rpc_argp = &arg,
2970 .rpc_resp = &res,
2971 };
011fff72 2972 int status = -ENOMEM;
1da177e4 2973
7c513058 2974 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2975 if (!status) {
2976 update_changeattr(old_dir, &res.old_cinfo);
2977 update_changeattr(new_dir, &res.new_cinfo);
2978 }
2979 return status;
2980}
2981
2982static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2983 struct inode *new_dir, struct qstr *new_name)
2984{
2985 struct nfs4_exception exception = { };
2986 int err;
2987 do {
2988 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2989 _nfs4_proc_rename(old_dir, old_name,
2990 new_dir, new_name),
2991 &exception);
2992 } while (exception.retry);
2993 return err;
2994}
2995
2996static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2997{
91ba2eee 2998 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2999 struct nfs4_link_arg arg = {
3000 .fh = NFS_FH(inode),
3001 .dir_fh = NFS_FH(dir),
3002 .name = name,
91ba2eee
TM		 3003 .bitmask = server->attr_bitmask,
3004 };
91ba2eee
TM		 3005 struct nfs4_link_res res = {
3006 .server = server,
1da177e4 3007 };
1da177e4
LT		 3008 struct rpc_message msg = {
3009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3010 .rpc_argp = &arg,
91ba2eee 3011 .rpc_resp = &res,
1da177e4 3012 };
136f2627
TM		 3013 int status = -ENOMEM;
3014
3015 res.fattr = nfs_alloc_fattr();
778d2817 3016 if (res.fattr == NULL)
136f2627 3017 goto out;
1da177e4 3018
7c513058 3019 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3020 if (!status) {
3021 update_changeattr(dir, &res.cinfo);
73a3d07c 3022 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3023 }
136f2627 3024out:
136f2627 3025 nfs_free_fattr(res.fattr);
1da177e4
LT		 3026 return status;
3027}
3028
3029static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3030{
3031 struct nfs4_exception exception = { };
3032 int err;
3033 do {
3034 err = nfs4_handle_exception(NFS_SERVER(inode),
3035 _nfs4_proc_link(inode, dir, name),
3036 &exception);
3037 } while (exception.retry);
3038 return err;
3039}
3040
57dc9a57
TM		 3041struct nfs4_createdata {
3042 struct rpc_message msg;
3043 struct nfs4_create_arg arg;
3044 struct nfs4_create_res res;
3045 struct nfs_fh fh;
3046 struct nfs_fattr fattr;
57dc9a57
TM		 3047};
3048
3049static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3050 struct qstr *name, struct iattr *sattr, u32 ftype)
3051{
3052 struct nfs4_createdata *data;
3053
3054 data = kzalloc(sizeof(*data), GFP_KERNEL);
3055 if (data != NULL) {
3056 struct nfs_server *server = NFS_SERVER(dir);
3057
3058 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3059 data->msg.rpc_argp = &data->arg;
3060 data->msg.rpc_resp = &data->res;
3061 data->arg.dir_fh = NFS_FH(dir);
3062 data->arg.server = server;
3063 data->arg.name = name;
3064 data->arg.attrs = sattr;
3065 data->arg.ftype = ftype;
3066 data->arg.bitmask = server->attr_bitmask;
3067 data->res.server = server;
3068 data->res.fh = &data->fh;
3069 data->res.fattr = &data->fattr;
57dc9a57 3070 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3071 }
3072 return data;
3073}
3074
3075static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3076{
7c513058 3077 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3078 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3079 if (status == 0) {
3080 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3081 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3082 }
3083 return status;
3084}
3085
3086static void nfs4_free_createdata(struct nfs4_createdata *data)
3087{
3088 kfree(data);
3089}
3090
4f390c15 3091static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3092 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3093{
57dc9a57
TM		 3094 struct nfs4_createdata *data;
3095 int status = -ENAMETOOLONG;
1da177e4 3096
94a6d753 3097 if (len > NFS4_MAXPATHLEN)
57dc9a57 3098 goto out;
4f390c15 3099
57dc9a57
TM		 3100 status = -ENOMEM;
3101 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3102 if (data == NULL)
3103 goto out;
3104
3105 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3106 data->arg.u.symlink.pages = &page;
3107 data->arg.u.symlink.len = len;
1da177e4 3108
57dc9a57
TM		 3109 status = nfs4_do_create(dir, dentry, data);
3110
3111 nfs4_free_createdata(data);
3112out:
1da177e4
LT		 3113 return status;
3114}
3115
4f390c15 3116static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3117 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3118{
3119 struct nfs4_exception exception = { };
3120 int err;
3121 do {
3122 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3123 _nfs4_proc_symlink(dir, dentry, page,
3124 len, sattr),
1da177e4
LT		 3125 &exception);
3126 } while (exception.retry);
3127 return err;
3128}
3129
3130static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3131 struct iattr *sattr)
3132{
57dc9a57
TM		 3133 struct nfs4_createdata *data;
3134 int status = -ENOMEM;
1da177e4 3135
57dc9a57
TM		 3136 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3137 if (data == NULL)
3138 goto out;
3139
3140 status = nfs4_do_create(dir, dentry, data);
3141
3142 nfs4_free_createdata(data);
3143out:
1da177e4
LT		 3144 return status;
3145}
3146
3147static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3148 struct iattr *sattr)
3149{
3150 struct nfs4_exception exception = { };
3151 int err;
a8a5da99
AK		 3152
3153 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3154 do {
3155 err = nfs4_handle_exception(NFS_SERVER(dir),
3156 _nfs4_proc_mkdir(dir, dentry, sattr),
3157 &exception);
3158 } while (exception.retry);
3159 return err;
3160}
3161
3162static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3163 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3164{
3165 struct inode *dir = dentry->d_inode;
3166 struct nfs4_readdir_arg args = {
3167 .fh = NFS_FH(dir),
56e4ebf8 3168 .pages = pages,
1da177e4
LT		 3169 .pgbase = 0,
3170 .count = count,
96d25e53 3171 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3172 .plus = plus,
1da177e4
LT		 3173 };
3174 struct nfs4_readdir_res res;
3175 struct rpc_message msg = {
3176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3177 .rpc_argp = &args,
3178 .rpc_resp = &res,
3179 .rpc_cred = cred,
3180 };
3181 int status;
3182
3110ff80 3183 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3184 dentry->d_parent->d_name.name,
3185 dentry->d_name.name,
3186 (unsigned long long)cookie);
1da177e4
LT		 3187 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3188 res.pgbase = args.pgbase;
7c513058 3189 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3190 if (status >= 0) {
1da177e4 3191 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3192 status += args.pgbase;
3193 }
c4812998
TM		 3194
3195 nfs_invalidate_atime(dir);
3196
3110ff80 3197 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3198 return status;
3199}
3200
3201static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3202 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3203{
3204 struct nfs4_exception exception = { };
3205 int err;
3206 do {
3207 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3208 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3209 pages, count, plus),
1da177e4
LT		 3210 &exception);
3211 } while (exception.retry);
3212 return err;
3213}
3214
3215static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3216 struct iattr *sattr, dev_t rdev)
3217{
57dc9a57
TM		 3218 struct nfs4_createdata *data;
3219 int mode = sattr->ia_mode;
3220 int status = -ENOMEM;
1da177e4
LT		 3221
3222 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3223 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3224
3225 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3226 if (data == NULL)
3227 goto out;
3228
1da177e4 3229 if (S_ISFIFO(mode))
57dc9a57 3230 data->arg.ftype = NF4FIFO;
1da177e4 3231 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3232 data->arg.ftype = NF4BLK;
3233 data->arg.u.device.specdata1 = MAJOR(rdev);
3234 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3235 }
3236 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3237 data->arg.ftype = NF4CHR;
3238 data->arg.u.device.specdata1 = MAJOR(rdev);
3239 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3240 }
1da177e4 3241
57dc9a57
TM		 3242 status = nfs4_do_create(dir, dentry, data);
3243
3244 nfs4_free_createdata(data);
3245out:
1da177e4
LT		 3246 return status;
3247}
3248
3249static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3250 struct iattr *sattr, dev_t rdev)
3251{
3252 struct nfs4_exception exception = { };
3253 int err;
a8a5da99
AK		 3254
3255 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3256 do {
3257 err = nfs4_handle_exception(NFS_SERVER(dir),
3258 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3259 &exception);
3260 } while (exception.retry);
3261 return err;
3262}
3263
3264static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3265 struct nfs_fsstat *fsstat)
3266{
3267 struct nfs4_statfs_arg args = {
3268 .fh = fhandle,
3269 .bitmask = server->attr_bitmask,
3270 };
24ad148a
BH		 3271 struct nfs4_statfs_res res = {
3272 .fsstat = fsstat,
3273 };
1da177e4
LT		 3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3276 .rpc_argp = &args,
24ad148a 3277 .rpc_resp = &res,
1da177e4
LT		 3278 };
3279
0e574af1 3280 nfs_fattr_init(fsstat->fattr);
7c513058 3281 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3282}
3283
3284static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3285{
3286 struct nfs4_exception exception = { };
3287 int err;
3288 do {
3289 err = nfs4_handle_exception(server,
3290 _nfs4_proc_statfs(server, fhandle, fsstat),
3291 &exception);
3292 } while (exception.retry);
3293 return err;
3294}
3295
3296static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3297 struct nfs_fsinfo *fsinfo)
3298{
3299 struct nfs4_fsinfo_arg args = {
3300 .fh = fhandle,
3301 .bitmask = server->attr_bitmask,
3302 };
3dda5e43
BH		 3303 struct nfs4_fsinfo_res res = {
3304 .fsinfo = fsinfo,
3305 };
1da177e4
LT		 3306 struct rpc_message msg = {
3307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3308 .rpc_argp = &args,
3dda5e43 3309 .rpc_resp = &res,
1da177e4
LT		 3310 };
3311
7c513058 3312 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3313}
3314
3315static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3316{
3317 struct nfs4_exception exception = { };
3318 int err;
3319
3320 do {
3321 err = nfs4_handle_exception(server,
3322 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3323 &exception);
3324 } while (exception.retry);
3325 return err;
3326}
3327
3328static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3329{
0e574af1 3330 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3331 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3332}
3333
3334static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3335 struct nfs_pathconf *pathconf)
3336{
3337 struct nfs4_pathconf_arg args = {
3338 .fh = fhandle,
3339 .bitmask = server->attr_bitmask,
3340 };
d45b2989
BH		 3341 struct nfs4_pathconf_res res = {
3342 .pathconf = pathconf,
3343 };
1da177e4
LT		 3344 struct rpc_message msg = {
3345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3346 .rpc_argp = &args,
d45b2989 3347 .rpc_resp = &res,
1da177e4
LT		 3348 };
3349
3350 /* None of the pathconf attributes are mandatory to implement */
3351 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3352 memset(pathconf, 0, sizeof(*pathconf));
3353 return 0;
3354 }
3355
0e574af1 3356 nfs_fattr_init(pathconf->fattr);
7c513058 3357 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3358}
3359
3360static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_pathconf *pathconf)
3362{
3363 struct nfs4_exception exception = { };
3364 int err;
3365
3366 do {
3367 err = nfs4_handle_exception(server,
3368 _nfs4_proc_pathconf(server, fhandle, pathconf),
3369 &exception);
3370 } while (exception.retry);
3371 return err;
3372}
3373
d20581aa
BH		 3374void __nfs4_read_done_cb(struct nfs_read_data *data)
3375{
cd841605 3376 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3377}
3378
cbdabc7f 3379static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3380{
cd841605 3381 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3382
9e33bed5 3383 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3384 rpc_restart_call_prepare(task);
ec06c096 3385 return -EAGAIN;
1da177e4 3386 }
8850df99 3387
d20581aa 3388 __nfs4_read_done_cb(data);
1da177e4 3389 if (task->tk_status > 0)
ec06c096
TM		 3390 renew_lease(server, data->timestamp);
3391 return 0;
1da177e4
LT		 3392}
3393
cbdabc7f
AA		 3394static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3395{
3396
3397 dprintk("--> %s\n", __func__);
3398
3399 if (!nfs4_sequence_done(task, &data->res.seq_res))
3400 return -EAGAIN;
3401
d20581aa
BH		 3402 return data->read_done_cb ? data->read_done_cb(task, data) :
3403 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3404}
3405
bdc7f021 3406static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3407{
1da177e4 3408 data->timestamp = jiffies;
cbdabc7f 3409 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3410 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3411 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3412}
3413
ea7c3303
BS		 3414static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3415{
cd841605 3416 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3417 &data->args.seq_args,
3418 &data->res.seq_res,
3419 task))
3420 return;
3421 rpc_call_start(task);
1da177e4
LT		 3422}
3423
b029bc9b 3424static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3425{
cd841605 3426 struct inode *inode = data->header->inode;
1da177e4 3427
9e33bed5 3428 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3429 rpc_restart_call_prepare(task);
788e7a89 3430 return -EAGAIN;
1da177e4 3431 }
4f9838c7 3432 if (task->tk_status >= 0) {
1da177e4 3433 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3434 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3435 }
788e7a89 3436 return 0;
1da177e4
LT		 3437}
3438
b029bc9b
FI		 3439static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3440{
3441 if (!nfs4_sequence_done(task, &data->res.seq_res))
3442 return -EAGAIN;
d20581aa
BH		 3443 return data->write_done_cb ? data->write_done_cb(task, data) :
3444 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3445}
3446
5a37f851
TM		 3447static
3448bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3449{
5a37f851
TM		 3450 const struct nfs_pgio_header *hdr = data->header;
3451
3452 /* Don't request attributes for pNFS or O_DIRECT writes */
3453 if (data->ds_clp != NULL || hdr->dreq != NULL)
3454 return false;
3455 /* Otherwise, request attributes if and only if we don't hold
3456 * a delegation
3457 */
3458 return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3459}
a69aef14 3460
bdc7f021 3461static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3462{
cd841605 3463 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3464
5a37f851 3465 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3466 data->args.bitmask = NULL;
3467 data->res.fattr = NULL;
3468 } else
3469 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3470
b029bc9b
FI		 3471 if (!data->write_done_cb)
3472 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3473 data->res.server = server;
1da177e4
LT		 3474 data->timestamp = jiffies;
3475
bdc7f021 3476 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3477 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3478}
3479
c6cb80d0
BS		 3480static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3481{
cd841605 3482 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3483 &data->args.seq_args,
3484 &data->res.seq_res,
3485 task))
3486 return;
3487 rpc_call_start(task);
1da177e4
LT		 3488}
3489
0b7c0153 3490static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3491{
3492 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3493 &data->args.seq_args,
3494 &data->res.seq_res,
3495 task))
3496 return;
3497 rpc_call_start(task);
1da177e4
LT		 3498}
3499
0b7c0153 3500static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3501{
1da177e4 3502 struct inode *inode = data->inode;
14516c3a 3503
9e33bed5 3504 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3505 rpc_restart_call_prepare(task);
788e7a89 3506 return -EAGAIN;
1da177e4 3507 }
788e7a89 3508 return 0;
1da177e4
LT		 3509}
3510
0b7c0153 3511static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3512{
3513 if (!nfs4_sequence_done(task, &data->res.seq_res))
3514 return -EAGAIN;
0b7c0153 3515 return data->commit_done_cb(task, data);
5f452431
FI		 3516}
3517
0b7c0153 3518static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3519{
788e7a89 3520 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3521
0b7c0153
FI		 3522 if (data->commit_done_cb == NULL)
3523 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3524 data->res.server = server;
bdc7f021 3525 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3526 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3527}
3528
9bc4e3ca
CL		 3529struct nfs4_renewdata {
3530 struct nfs_client *client;
3531 unsigned long timestamp;
3532};
3533
1da177e4
LT		 3534/*
3535 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3536 * standalone procedure for queueing an asynchronous RENEW.
3537 */
9bc4e3ca 3538static void nfs4_renew_release(void *calldata)
dc96aef9 3539{
9bc4e3ca
CL		 3540 struct nfs4_renewdata *data = calldata;
3541 struct nfs_client *clp = data->client;
dc96aef9 3542
0851de06
AB		 3543 if (atomic_read(&clp->cl_count) > 1)
3544 nfs4_schedule_state_renewal(clp);
3545 nfs_put_client(clp);
9bc4e3ca 3546 kfree(data);
dc96aef9
AB		 3547}
3548
9bc4e3ca 3549static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3550{
9bc4e3ca
CL		 3551 struct nfs4_renewdata *data = calldata;
3552 struct nfs_client *clp = data->client;
3553 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3554
3555 if (task->tk_status < 0) {
95baa25c 3556 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3557 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3558 return;
3559 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3560 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3561 return;
3562 }
3563 nfs4_schedule_path_down_recovery(clp);
1da177e4 3564 }
452e9352 3565 do_renew_lease(clp, timestamp);
1da177e4
LT		 3566}
3567
963d8fe5
TM		 3568static const struct rpc_call_ops nfs4_renew_ops = {
3569 .rpc_call_done = nfs4_renew_done,
dc96aef9 3570 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3571};
3572
2f60ea6b 3573static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3574{
3575 struct rpc_message msg = {
3576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3577 .rpc_argp = clp,
b4454fe1 3578 .rpc_cred = cred,
1da177e4 3579 };
9bc4e3ca 3580 struct nfs4_renewdata *data;
1da177e4 3581
2f60ea6b
TM		 3582 if (renew_flags == 0)
3583 return 0;
0851de06
AB		 3584 if (!atomic_inc_not_zero(&clp->cl_count))
3585 return -EIO;
b569ad34 3586 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3587 if (data == NULL)
3588 return -ENOMEM;
3589 data->client = clp;
3590 data->timestamp = jiffies;
1da177e4 3591 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3592 &nfs4_renew_ops, data);
1da177e4
LT		 3593}
3594
8534d4ec 3595static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3596{
3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3599 .rpc_argp = clp,
b4454fe1 3600 .rpc_cred = cred,
1da177e4
LT		 3601 };
3602 unsigned long now = jiffies;
3603 int status;
3604
3605 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3606 if (status < 0)
3607 return status;
452e9352 3608 do_renew_lease(clp, now);
1da177e4
LT		 3609 return 0;
3610}
3611
aa1870af
BF		 3612static inline int nfs4_server_supports_acls(struct nfs_server *server)
3613{
3614 return (server->caps & NFS_CAP_ACLS)
3615 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3616 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3617}
3618
3619/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3620 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3621 * the stack.
3622 */
3623#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3624
e9e3d724
NH		 3625static int buf_to_pages_noslab(const void *buf, size_t buflen,
3626 struct page **pages, unsigned int *pgbase)
3627{
3628 struct page *newpage, **spages;
3629 int rc = 0;
3630 size_t len;
3631 spages = pages;
3632
3633 do {
43b7c3f0 3634 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3635 newpage = alloc_page(GFP_KERNEL);
3636
3637 if (newpage == NULL)
3638 goto unwind;
3639 memcpy(page_address(newpage), buf, len);
3640 buf += len;
3641 buflen -= len;
3642 *pages++ = newpage;
3643 rc++;
3644 } while (buflen != 0);
3645
3646 return rc;
3647
3648unwind:
3649 for(; rc > 0; rc--)
3650 __free_page(spages[rc-1]);
3651 return -ENOMEM;
3652}
3653
e50a1c2e
BF		 3654struct nfs4_cached_acl {
3655 int cached;
3656 size_t len;
3e9d4154 3657 char data[0];
e50a1c2e
BF		 3658};
3659
3660static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3661{
3662 struct nfs_inode *nfsi = NFS_I(inode);
3663
3664 spin_lock(&inode->i_lock);
3665 kfree(nfsi->nfs4_acl);
3666 nfsi->nfs4_acl = acl;
3667 spin_unlock(&inode->i_lock);
3668}
3669
3670static void nfs4_zap_acl_attr(struct inode *inode)
3671{
3672 nfs4_set_cached_acl(inode, NULL);
3673}
3674
3675static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3676{
3677 struct nfs_inode *nfsi = NFS_I(inode);
3678 struct nfs4_cached_acl *acl;
3679 int ret = -ENOENT;
3680
3681 spin_lock(&inode->i_lock);
3682 acl = nfsi->nfs4_acl;
3683 if (acl == NULL)
3684 goto out;
3685 if (buf == NULL) /* user is just asking for length */
3686 goto out_len;
3687 if (acl->cached == 0)
3688 goto out;
3689 ret = -ERANGE; /* see getxattr(2) man page */
3690 if (acl->len > buflen)
3691 goto out;
3692 memcpy(buf, acl->data, acl->len);
3693out_len:
3694 ret = acl->len;
3695out:
3696 spin_unlock(&inode->i_lock);
3697 return ret;
3698}
3699
5794d21e 3700static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3701{
3702 struct nfs4_cached_acl *acl;
3703
5794d21e 3704 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3705 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3706 if (acl == NULL)
3707 goto out;
3708 acl->cached = 1;
5794d21e 3709 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3710 } else {
3711 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3712 if (acl == NULL)
3713 goto out;
3714 acl->cached = 0;
3715 }
3716 acl->len = acl_len;
3717out:
3718 nfs4_set_cached_acl(inode, acl);
3719}
3720
bf118a34
AA		 3721/*
3722 * The getxattr API returns the required buffer length when called with a
3723 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3724 * the required buf. On a NULL buf, we send a page of data to the server
3725 * guessing that the ACL request can be serviced by a page. If so, we cache
3726 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3727 * the cache. If not so, we throw away the page, and cache the required
3728 * length. The next getxattr call will then produce another round trip to
3729 * the server, this time with the input buf of the required size.
3730 */
16b4289c 3731static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3732{
bf118a34 3733 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3734 struct nfs_getaclargs args = {
3735 .fh = NFS_FH(inode),
3736 .acl_pages = pages,
3737 .acl_len = buflen,
3738 };
663c79b3
BH		 3739 struct nfs_getaclres res = {
3740 .acl_len = buflen,
3741 };
aa1870af
BF		 3742 struct rpc_message msg = {
3743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3744 .rpc_argp = &args,
663c79b3 3745 .rpc_resp = &res,
aa1870af 3746 };
bf118a34 3747 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3748
bf118a34
AA		 3749 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3750 /* As long as we're doing a round trip to the server anyway,
3751 * let's be prepared for a page of acl data. */
3752 if (npages == 0)
3753 npages = 1;
3754
5a006899
SP		 3755 /* Add an extra page to handle the bitmap returned */
3756 npages++;
3757
bf118a34
AA		 3758 for (i = 0; i < npages; i++) {
3759 pages[i] = alloc_page(GFP_KERNEL);
3760 if (!pages[i])
3761 goto out_free;
e50a1c2e 3762 }
5a006899
SP		 3763
3764 /* for decoding across pages */
3765 res.acl_scratch = alloc_page(GFP_KERNEL);
3766 if (!res.acl_scratch)
3767 goto out_free;
3768
bf118a34
AA		 3769 args.acl_len = npages * PAGE_SIZE;
3770 args.acl_pgbase = 0;
5a006899 3771
bf118a34
AA		 3772 /* Let decode_getfacl know not to fail if the ACL data is larger than
3773 * the page we send as a guess */
3774 if (buf == NULL)
3775 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3776
de040bec 3777 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3778 __func__, buf, buflen, npages, args.acl_len);
3779 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3780 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3781 if (ret)
3782 goto out_free;
bf118a34
AA		 3783
3784 acl_len = res.acl_len - res.acl_data_offset;
3785 if (acl_len > args.acl_len)
5794d21e 3786 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3787 else
5794d21e 3788 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3789 acl_len);
e50a1c2e
BF		 3790 if (buf) {
3791 ret = -ERANGE;
bf118a34 3792 if (acl_len > buflen)
e50a1c2e 3793 goto out_free;
bf118a34 3794 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3795 acl_len);
e50a1c2e 3796 }
bf118a34 3797 ret = acl_len;
e50a1c2e 3798out_free:
bf118a34
AA		 3799 for (i = 0; i < npages; i++)
3800 if (pages[i])
3801 __free_page(pages[i]);
331818f1
TM		 3802 if (res.acl_scratch)
3803 __free_page(res.acl_scratch);
aa1870af
BF		 3804 return ret;
3805}
3806
16b4289c
TM		 3807static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3808{
3809 struct nfs4_exception exception = { };
3810 ssize_t ret;
3811 do {
3812 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3813 if (ret >= 0)
3814 break;
3815 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3816 } while (exception.retry);
3817 return ret;
3818}
3819
e50a1c2e
BF		 3820static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3821{
3822 struct nfs_server *server = NFS_SERVER(inode);
3823 int ret;
3824
3825 if (!nfs4_server_supports_acls(server))
3826 return -EOPNOTSUPP;
3827 ret = nfs_revalidate_inode(server, inode);
3828 if (ret < 0)
3829 return ret;
08a22b39
AK		 3830 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3831 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3832 ret = nfs4_read_cached_acl(inode, buf, buflen);
3833 if (ret != -ENOENT)
bf118a34
AA		 3834 /* -ENOENT is returned if there is no ACL or if there is an ACL
3835 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3836 return ret;
3837 return nfs4_get_acl_uncached(inode, buf, buflen);
3838}
3839
16b4289c 3840static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3841{
3842 struct nfs_server *server = NFS_SERVER(inode);
3843 struct page *pages[NFS4ACL_MAXPAGES];
3844 struct nfs_setaclargs arg = {
3845 .fh = NFS_FH(inode),
3846 .acl_pages = pages,
3847 .acl_len = buflen,
3848 };
73c403a9 3849 struct nfs_setaclres res;
4b580ee3
BF		 3850 struct rpc_message msg = {
3851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3852 .rpc_argp = &arg,
73c403a9 3853 .rpc_resp = &res,
4b580ee3 3854 };
e9e3d724 3855 int ret, i;
4b580ee3
BF		 3856
3857 if (!nfs4_server_supports_acls(server))
3858 return -EOPNOTSUPP;
e9e3d724
NH		 3859 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3860 if (i < 0)
3861 return i;
642ac549 3862 nfs_inode_return_delegation(inode);
7c513058 3863 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3864
3865 /*
3866 * Free each page after tx, so the only ref left is
3867 * held by the network stack
3868 */
3869 for (; i > 0; i--)
3870 put_page(pages[i-1]);
3871
08a22b39
AK		 3872 /*
3873 * Acl update can result in inode attribute update.
3874 * so mark the attribute cache invalid.
3875 */
3876 spin_lock(&inode->i_lock);
3877 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3878 spin_unlock(&inode->i_lock);
f41f7418
TM		 3879 nfs_access_zap_cache(inode);
3880 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3881 return ret;
3882}
3883
16b4289c
TM		 3884static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3885{
3886 struct nfs4_exception exception = { };
3887 int err;
3888 do {
3889 err = nfs4_handle_exception(NFS_SERVER(inode),
3890 __nfs4_proc_set_acl(inode, buf, buflen),
3891 &exception);
3892 } while (exception.retry);
3893 return err;
3894}
3895
1da177e4 3896static int
aa5190d0 3897nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3898{
aa5190d0
TM		 3899 struct nfs_client *clp = server->nfs_client;
3900
3901 if (task->tk_status >= 0)
1da177e4
LT		 3902 return 0;
3903 switch(task->tk_status) {
a1d0b5ee 3904 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3905 case -NFS4ERR_ADMIN_REVOKED:
3906 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3907 if (state == NULL)
3908 break;
3909 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3910 case -NFS4ERR_OPENMODE:
3911 if (state == NULL)
3912 break;
0400a6b0
TM		 3913 nfs4_schedule_stateid_recovery(server, state);
3914 goto wait_on_recovery;
0ced63d1
TM		 3915 case -NFS4ERR_EXPIRED:
3916 if (state != NULL)
3917 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3918 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3919 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3920 nfs4_schedule_lease_recovery(clp);
3921 goto wait_on_recovery;
4745e315
AA		 3922#if defined(CONFIG_NFS_V4_1)
3923 case -NFS4ERR_BADSESSION:
3924 case -NFS4ERR_BADSLOT:
3925 case -NFS4ERR_BAD_HIGH_SLOT:
3926 case -NFS4ERR_DEADSESSION:
3927 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3928 case -NFS4ERR_SEQ_FALSE_RETRY:
3929 case -NFS4ERR_SEQ_MISORDERED:
3930 dprintk("%s ERROR %d, Reset session\n", __func__,
3931 task->tk_status);
9f594791 3932 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3933 task->tk_status = 0;
3934 return -EAGAIN;
3935#endif /* CONFIG_NFS_V4_1 */
1da177e4 3936 case -NFS4ERR_DELAY:
aa5190d0 3937 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3938 case -NFS4ERR_GRACE:
2c643488 3939 case -EKEYEXPIRED:
1da177e4
LT		 3940 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3941 task->tk_status = 0;
3942 return -EAGAIN;
a8a4ae3a 3943 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3944 case -NFS4ERR_OLD_STATEID:
3945 task->tk_status = 0;
3946 return -EAGAIN;
3947 }
3948 task->tk_status = nfs4_map_errors(task->tk_status);
3949 return 0;
0400a6b0 3950wait_on_recovery:
a2c0b9e2 3951 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3952 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3953 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3954 task->tk_status = 0;
3955 return -EAGAIN;
1da177e4
LT		 3956}
3957
f092075d
CL		 3958static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3959 nfs4_verifier *bootverf)
cd93710e
CL		 3960{
3961 __be32 verf[2];
3962
2c820d9a
CL		 3963 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3964 /* An impossible timestamp guarantees this value
3965 * will never match a generated boot time. */
3966 verf[0] = 0;
3967 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3968 } else {
f092075d
CL		 3969 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3970 verf[0] = (__be32)nn->boot_time.tv_sec;
3971 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 3972 }
cd93710e
CL		 3973 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3974}
3975
bb8b27e5
TM		 3976int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3977 unsigned short port, struct rpc_cred *cred,
3978 struct nfs4_setclientid_res *res)
1da177e4
LT		 3979{
3980 nfs4_verifier sc_verifier;
3981 struct nfs4_setclientid setclientid = {
3982 .sc_verifier = &sc_verifier,
3983 .sc_prog = program,
f4eecd5d 3984 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3985 };
3986 struct rpc_message msg = {
3987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3988 .rpc_argp = &setclientid,
bb8b27e5 3989 .rpc_resp = res,
286d7d6a 3990 .rpc_cred = cred,
1da177e4 3991 };
1da177e4
LT		 3992 int loop = 0;
3993 int status;
3994
f092075d 3995 nfs4_init_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3996
3997 for(;;) {
2446ab60 3998 rcu_read_lock();
1da177e4 3999 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 4000 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 4001 clp->cl_ipaddr,
4002 rpc_peeraddr2str(clp->cl_rpcclient,
4003 RPC_DISPLAY_ADDR),
69dd716c
TM		 4004 rpc_peeraddr2str(clp->cl_rpcclient,
4005 RPC_DISPLAY_PROTO),
78ea323b 4006 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 4007 clp->cl_id_uniquifier);
4008 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4009 sizeof(setclientid.sc_netid),
4010 rpc_peeraddr2str(clp->cl_rpcclient,
4011 RPC_DISPLAY_NETID));
1da177e4 4012 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4013 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 4014 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 4015 rcu_read_unlock();
1da177e4 4016
1bd714f2 4017 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4018 if (status != -NFS4ERR_CLID_INUSE)
4019 break;
fd954ae1
TM		 4020 if (loop != 0) {
4021 ++clp->cl_id_uniquifier;
1da177e4 4022 break;
fd954ae1
TM		 4023 }
4024 ++loop;
4025 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 4026 }
4027 return status;
4028}
4029
fd954ae1 4030int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4031 struct nfs4_setclientid_res *arg,
4032 struct rpc_cred *cred)
1da177e4
LT		 4033{
4034 struct nfs_fsinfo fsinfo;
4035 struct rpc_message msg = {
4036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4037 .rpc_argp = arg,
1da177e4 4038 .rpc_resp = &fsinfo,
286d7d6a 4039 .rpc_cred = cred,
1da177e4
LT		 4040 };
4041 unsigned long now;
4042 int status;
4043
4044 now = jiffies;
1bd714f2 4045 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4046 if (status == 0) {
4047 spin_lock(&clp->cl_lock);
4048 clp->cl_lease_time = fsinfo.lease_time * HZ;
4049 clp->cl_last_renewal = now;
4050 spin_unlock(&clp->cl_lock);
4051 }
4052 return status;
4053}
4054
fe650407
TM		 4055struct nfs4_delegreturndata {
4056 struct nfs4_delegreturnargs args;
fa178f29 4057 struct nfs4_delegreturnres res;
fe650407
TM		 4058 struct nfs_fh fh;
4059 nfs4_stateid stateid;
26e976a8 4060 unsigned long timestamp;
fa178f29 4061 struct nfs_fattr fattr;
fe650407
TM		 4062 int rpc_status;
4063};
4064
fe650407
TM		 4065static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4066{
4067 struct nfs4_delegreturndata *data = calldata;
938e1010 4068
14516c3a
TM		 4069 if (!nfs4_sequence_done(task, &data->res.seq_res))
4070 return;
938e1010 4071
79708861
RL		 4072 switch (task->tk_status) {
4073 case -NFS4ERR_STALE_STATEID:
4074 case -NFS4ERR_EXPIRED:
4075 case 0:
fa178f29 4076 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4077 break;
4078 default:
4079 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4080 -EAGAIN) {
d00c5d43 4081 rpc_restart_call_prepare(task);
79708861
RL		 4082 return;
4083 }
4084 }
4085 data->rpc_status = task->tk_status;
fe650407
TM		 4086}
4087
4088static void nfs4_delegreturn_release(void *calldata)
4089{
fe650407
TM		 4090 kfree(calldata);
4091}
4092
938e1010
AA		 4093#if defined(CONFIG_NFS_V4_1)
4094static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4095{
4096 struct nfs4_delegreturndata *d_data;
4097
4098 d_data = (struct nfs4_delegreturndata *)data;
4099
035168ab 4100 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4101 &d_data->args.seq_args,
9d12b216 4102 &d_data->res.seq_res, task))
938e1010
AA		 4103 return;
4104 rpc_call_start(task);
4105}
4106#endif /* CONFIG_NFS_V4_1 */
4107
c8d149f3 4108static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4109#if defined(CONFIG_NFS_V4_1)
4110 .rpc_call_prepare = nfs4_delegreturn_prepare,
4111#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4112 .rpc_call_done = nfs4_delegreturn_done,
4113 .rpc_release = nfs4_delegreturn_release,
4114};
4115
e6f81075 4116static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4117{
4118 struct nfs4_delegreturndata *data;
fa178f29 4119 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4120 struct rpc_task *task;
5138fde0
TM		 4121 struct rpc_message msg = {
4122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4123 .rpc_cred = cred,
4124 };
c970aa85
TM		 4125 struct rpc_task_setup task_setup_data = {
4126 .rpc_client = server->client,
5138fde0 4127 .rpc_message = &msg,
c970aa85
TM		 4128 .callback_ops = &nfs4_delegreturn_ops,
4129 .flags = RPC_TASK_ASYNC,
4130 };
e6f81075 4131 int status = 0;
fe650407 4132
8535b2be 4133 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4134 if (data == NULL)
4135 return -ENOMEM;
9d12b216 4136 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4137 data->args.fhandle = &data->fh;
4138 data->args.stateid = &data->stateid;
9e907fec 4139 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4140 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4141 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4142 data->res.fattr = &data->fattr;
4143 data->res.server = server;
5138fde0 4144 nfs_fattr_init(data->res.fattr);
26e976a8 4145 data->timestamp = jiffies;
fe650407
TM		 4146 data->rpc_status = 0;
4147
c970aa85 4148 task_setup_data.callback_data = data;
1174dd1f
TM		 4149 msg.rpc_argp = &data->args;
4150 msg.rpc_resp = &data->res;
c970aa85 4151 task = rpc_run_task(&task_setup_data);
7a1218a2 4152 if (IS_ERR(task))
fe650407 4153 return PTR_ERR(task);
e6f81075
TM		 4154 if (!issync)
4155 goto out;
fe650407 4156 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4157 if (status != 0)
4158 goto out;
4159 status = data->rpc_status;
e144cbcc
TM		 4160 if (status == 0)
4161 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4162 else
4163 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4164out:
e6b3c4db 4165 rpc_put_task(task);
fe650407 4166 return status;
1da177e4
LT		 4167}
4168
e6f81075 4169int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4170{
4171 struct nfs_server *server = NFS_SERVER(inode);
4172 struct nfs4_exception exception = { };
4173 int err;
4174 do {
e6f81075 4175 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4176 switch (err) {
4177 case -NFS4ERR_STALE_STATEID:
4178 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4179 case 0:
4180 return 0;
4181 }
4182 err = nfs4_handle_exception(server, err, &exception);
4183 } while (exception.retry);
4184 return err;
4185}
4186
4187#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4188#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4189
4190/*
4191 * sleep, with exponential backoff, and retry the LOCK operation.
4192 */
4193static unsigned long
4194nfs4_set_lock_task_retry(unsigned long timeout)
4195{
d310310c 4196 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4197 timeout <<= 1;
4198 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4199 return NFS4_LOCK_MAXTIMEOUT;
4200 return timeout;
4201}
4202
1da177e4
LT		 4203static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4204{
4205 struct inode *inode = state->inode;
4206 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4207 struct nfs_client *clp = server->nfs_client;
911d1aaf 4208 struct nfs_lockt_args arg = {
1da177e4 4209 .fh = NFS_FH(inode),
911d1aaf 4210 .fl = request,
1da177e4 4211 };
911d1aaf
TM		 4212 struct nfs_lockt_res res = {
4213 .denied = request,
1da177e4
LT		 4214 };
4215 struct rpc_message msg = {
4216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4217 .rpc_argp = &arg,
4218 .rpc_resp = &res,
4219 .rpc_cred = state->owner->so_cred,
4220 };
1da177e4
LT		 4221 struct nfs4_lock_state *lsp;
4222 int status;
4223
911d1aaf 4224 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4225 status = nfs4_set_lock_state(state, request);
4226 if (status != 0)
4227 goto out;
4228 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4229 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4230 arg.lock_owner.s_dev = server->s_dev;
7c513058 4231 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4232 switch (status) {
4233 case 0:
4234 request->fl_type = F_UNLCK;
4235 break;
4236 case -NFS4ERR_DENIED:
4237 status = 0;
1da177e4 4238 }
70cc6487 4239 request->fl_ops->fl_release_private(request);
8d0a8a9d 4240out:
1da177e4
LT		 4241 return status;
4242}
4243
4244static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4245{
4246 struct nfs4_exception exception = { };
4247 int err;
4248
4249 do {
4250 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4251 _nfs4_proc_getlk(state, cmd, request),
4252 &exception);
4253 } while (exception.retry);
4254 return err;
4255}
4256
4257static int do_vfs_lock(struct file *file, struct file_lock *fl)
4258{
4259 int res = 0;
4260 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4261 case FL_POSIX:
4262 res = posix_lock_file_wait(file, fl);
4263 break;
4264 case FL_FLOCK:
4265 res = flock_lock_file_wait(file, fl);
4266 break;
4267 default:
4268 BUG();
4269 }
1da177e4
LT		 4270 return res;
4271}
4272
faf5f49c 4273struct nfs4_unlockdata {
911d1aaf
TM		 4274 struct nfs_locku_args arg;
4275 struct nfs_locku_res res;
faf5f49c
TM		 4276 struct nfs4_lock_state *lsp;
4277 struct nfs_open_context *ctx;
911d1aaf
TM		 4278 struct file_lock fl;
4279 const struct nfs_server *server;
26e976a8 4280 unsigned long timestamp;
faf5f49c
TM		 4281};
4282
911d1aaf
TM		 4283static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4284 struct nfs_open_context *ctx,
4285 struct nfs4_lock_state *lsp,
4286 struct nfs_seqid *seqid)
4287{
4288 struct nfs4_unlockdata *p;
4289 struct inode *inode = lsp->ls_state->inode;
4290
8535b2be 4291 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4292 if (p == NULL)
4293 return NULL;
4294 p->arg.fh = NFS_FH(inode);
4295 p->arg.fl = &p->fl;
4296 p->arg.seqid = seqid;
c1d51931 4297 p->res.seqid = seqid;
911d1aaf
TM		 4298 p->arg.stateid = &lsp->ls_stateid;
4299 p->lsp = lsp;
4300 atomic_inc(&lsp->ls_count);
4301 /* Ensure we don't close file until we're done freeing locks! */
4302 p->ctx = get_nfs_open_context(ctx);
4303 memcpy(&p->fl, fl, sizeof(p->fl));
4304 p->server = NFS_SERVER(inode);
4305 return p;
4306}
4307
06f814a3 4308static void nfs4_locku_release_calldata(void *data)
faf5f49c 4309{
963d8fe5 4310 struct nfs4_unlockdata *calldata = data;
911d1aaf 4311 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4312 nfs4_put_lock_state(calldata->lsp);
4313 put_nfs_open_context(calldata->ctx);
4314 kfree(calldata);
faf5f49c
TM		 4315}
4316
963d8fe5 4317static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4318{
963d8fe5 4319 struct nfs4_unlockdata *calldata = data;
faf5f49c 4320
14516c3a
TM		 4321 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4322 return;
faf5f49c
TM		 4323 switch (task->tk_status) {
4324 case 0:
f597c537
TM		 4325 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4326 &calldata->res.stateid);
26e976a8 4327 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4328 break;
9e33bed5
TM		 4329 case -NFS4ERR_BAD_STATEID:
4330 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4331 case -NFS4ERR_STALE_STATEID:
4332 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4333 break;
4334 default:
9e33bed5 4335 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4336 rpc_restart_call_prepare(task);
faf5f49c 4337 }
faf5f49c
TM		 4338}
4339
4ce70ada 4340static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4341{
4ce70ada 4342 struct nfs4_unlockdata *calldata = data;
faf5f49c 4343
911d1aaf 4344 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4345 return;
4346 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4347 /* Note: exit _without_ running nfs4_locku_done */
4348 task->tk_action = NULL;
faf5f49c
TM		 4349 return;
4350 }
26e976a8 4351 calldata->timestamp = jiffies;
035168ab 4352 if (nfs4_setup_sequence(calldata->server,
a893693c 4353 &calldata->arg.seq_args,
9d12b216 4354 &calldata->res.seq_res, task))
a893693c 4355 return;
5138fde0 4356 rpc_call_start(task);
faf5f49c
TM		 4357}
4358
963d8fe5 4359static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4360 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4361 .rpc_call_done = nfs4_locku_done,
06f814a3 4362 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4363};
4364
a5d16a4d
TM		 4365static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4366 struct nfs_open_context *ctx,
4367 struct nfs4_lock_state *lsp,
4368 struct nfs_seqid *seqid)
4369{
4370 struct nfs4_unlockdata *data;
5138fde0
TM		 4371 struct rpc_message msg = {
4372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4373 .rpc_cred = ctx->cred,
4374 };
c970aa85
TM		 4375 struct rpc_task_setup task_setup_data = {
4376 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4377 .rpc_message = &msg,
c970aa85 4378 .callback_ops = &nfs4_locku_ops,
101070ca 4379 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4380 .flags = RPC_TASK_ASYNC,
4381 };
a5d16a4d 4382
137d6aca
FF		 4383 /* Ensure this is an unlock - when canceling a lock, the
4384 * canceled lock is passed in, and it won't be an unlock.
4385 */
4386 fl->fl_type = F_UNLCK;
4387
a5d16a4d
TM		 4388 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4389 if (data == NULL) {
4390 nfs_free_seqid(seqid);
4391 return ERR_PTR(-ENOMEM);
4392 }
4393
9d12b216 4394 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4395 msg.rpc_argp = &data->arg;
4396 msg.rpc_resp = &data->res;
c970aa85
TM		 4397 task_setup_data.callback_data = data;
4398 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4399}
4400
faf5f49c
TM		 4401static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4402{
19e03c57 4403 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4404 struct nfs_seqid *seqid;
1da177e4 4405 struct nfs4_lock_state *lsp;
06f814a3
TM		 4406 struct rpc_task *task;
4407 int status = 0;
536ff0f8 4408 unsigned char fl_flags = request->fl_flags;
faf5f49c 4409
8d0a8a9d 4410 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4411 /* Unlock _before_ we do the RPC call */
4412 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4413 down_read(&nfsi->rwsem);
4414 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4415 up_read(&nfsi->rwsem);
9b073574 4416 goto out;
19e03c57
TM		 4417 }
4418 up_read(&nfsi->rwsem);
8d0a8a9d 4419 if (status != 0)
9b073574
TM		 4420 goto out;
4421 /* Is this a delegated lock? */
4422 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4423 goto out;
8d0a8a9d 4424 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4425 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4426 status = -ENOMEM;
911d1aaf 4427 if (seqid == NULL)
9b073574 4428 goto out;
cd3758e3 4429 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4430 status = PTR_ERR(task);
4431 if (IS_ERR(task))
9b073574 4432 goto out;
a5d16a4d 4433 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4434 rpc_put_task(task);
9b073574 4435out:
536ff0f8 4436 request->fl_flags = fl_flags;
1da177e4
LT		 4437 return status;
4438}
4439
a5d16a4d
TM		 4440struct nfs4_lockdata {
4441 struct nfs_lock_args arg;
4442 struct nfs_lock_res res;
4443 struct nfs4_lock_state *lsp;
4444 struct nfs_open_context *ctx;
4445 struct file_lock fl;
26e976a8 4446 unsigned long timestamp;
a5d16a4d
TM		 4447 int rpc_status;
4448 int cancelled;
66179efe 4449 struct nfs_server *server;
a5d16a4d
TM		 4450};
4451
4452static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4453 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4454 gfp_t gfp_mask)
1da177e4 4455{
a5d16a4d
TM		 4456 struct nfs4_lockdata *p;
4457 struct inode *inode = lsp->ls_state->inode;
1da177e4 4458 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4459
8535b2be 4460 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4461 if (p == NULL)
4462 return NULL;
4463
4464 p->arg.fh = NFS_FH(inode);
4465 p->arg.fl = &p->fl;
8535b2be 4466 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4467 if (p->arg.open_seqid == NULL)
4468 goto out_free;
8535b2be 4469 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4470 if (p->arg.lock_seqid == NULL)
2f74c0a0 4471 goto out_free_seqid;
a5d16a4d 4472 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4473 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4474 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4475 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4476 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4477 p->lsp = lsp;
66179efe 4478 p->server = server;
a5d16a4d
TM		 4479 atomic_inc(&lsp->ls_count);
4480 p->ctx = get_nfs_open_context(ctx);
4481 memcpy(&p->fl, fl, sizeof(p->fl));
4482 return p;
2f74c0a0
TM		 4483out_free_seqid:
4484 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4485out_free:
4486 kfree(p);
4487 return NULL;
4488}
4489
4490static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4491{
4492 struct nfs4_lockdata *data = calldata;
4493 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4494
3110ff80 4495 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4496 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4497 return;
a5d16a4d
TM		 4498 /* Do we need to do an open_to_lock_owner? */
4499 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4500 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4501 return;
a5d16a4d
TM		 4502 data->arg.open_stateid = &state->stateid;
4503 data->arg.new_lock_owner = 1;
c1d51931 4504 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4505 } else
4506 data->arg.new_lock_owner = 0;
26e976a8 4507 data->timestamp = jiffies;
035168ab
TM		 4508 if (nfs4_setup_sequence(data->server,
4509 &data->arg.seq_args,
9d12b216 4510 &data->res.seq_res, task))
66179efe 4511 return;
5138fde0 4512 rpc_call_start(task);
3110ff80 4513 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4514}
4515
b257957e
AB		 4516static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4517{
4518 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4519 nfs4_lock_prepare(task, calldata);
4520}
4521
a5d16a4d
TM		 4522static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4523{
4524 struct nfs4_lockdata *data = calldata;
4525
3110ff80 4526 dprintk("%s: begin!\n", __func__);
a5d16a4d 4527
14516c3a
TM		 4528 if (!nfs4_sequence_done(task, &data->res.seq_res))
4529 return;
66179efe 4530
a5d16a4d 4531 data->rpc_status = task->tk_status;
a5d16a4d 4532 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4533 if (data->rpc_status == 0)
4534 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4535 else
4536 goto out;
4537 }
4538 if (data->rpc_status == 0) {
f597c537 4539 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4540 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4541 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4542 }
a5d16a4d 4543out:
3110ff80 4544 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4545}
4546
4547static void nfs4_lock_release(void *calldata)
4548{
4549 struct nfs4_lockdata *data = calldata;
4550
3110ff80 4551 dprintk("%s: begin!\n", __func__);
2f74c0a0 4552 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4553 if (data->cancelled != 0) {
4554 struct rpc_task *task;
4555 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4556 data->arg.lock_seqid);
4557 if (!IS_ERR(task))
bf294b41 4558 rpc_put_task_async(task);
3110ff80 4559 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4560 } else
4561 nfs_free_seqid(data->arg.lock_seqid);
4562 nfs4_put_lock_state(data->lsp);
4563 put_nfs_open_context(data->ctx);
4564 kfree(data);
3110ff80 4565 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4566}
4567
4568static const struct rpc_call_ops nfs4_lock_ops = {
4569 .rpc_call_prepare = nfs4_lock_prepare,
4570 .rpc_call_done = nfs4_lock_done,
4571 .rpc_release = nfs4_lock_release,
4572};
4573
b257957e
AB		 4574static const struct rpc_call_ops nfs4_recover_lock_ops = {
4575 .rpc_call_prepare = nfs4_recover_lock_prepare,
4576 .rpc_call_done = nfs4_lock_done,
4577 .rpc_release = nfs4_lock_release,
4578};
4579
2bee72a6
TM		 4580static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4581{
2bee72a6
TM		 4582 switch (error) {
4583 case -NFS4ERR_ADMIN_REVOKED:
4584 case -NFS4ERR_BAD_STATEID:
ecac799a 4585 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4586 if (new_lock_owner != 0 ||
4587 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4588 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4589 break;
4590 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4591 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4592 case -NFS4ERR_EXPIRED:
4593 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4594 };
4595}
4596
afe6c27c 4597static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4598{
4599 struct nfs4_lockdata *data;
4600 struct rpc_task *task;
5138fde0
TM		 4601 struct rpc_message msg = {
4602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4603 .rpc_cred = state->owner->so_cred,
4604 };
c970aa85
TM		 4605 struct rpc_task_setup task_setup_data = {
4606 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4607 .rpc_message = &msg,
c970aa85 4608 .callback_ops = &nfs4_lock_ops,
101070ca 4609 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4610 .flags = RPC_TASK_ASYNC,
4611 };
a5d16a4d
TM		 4612 int ret;
4613
3110ff80 4614 dprintk("%s: begin!\n", __func__);
cd3758e3 4615 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4616 fl->fl_u.nfs4_fl.owner,
4617 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4618 if (data == NULL)
4619 return -ENOMEM;
4620 if (IS_SETLKW(cmd))
4621 data->arg.block = 1;
b257957e
AB		 4622 if (recovery_type > NFS_LOCK_NEW) {
4623 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4624 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4625 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4626 }
9d12b216 4627 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4628 msg.rpc_argp = &data->arg;
4629 msg.rpc_resp = &data->res;
c970aa85
TM		 4630 task_setup_data.callback_data = data;
4631 task = rpc_run_task(&task_setup_data);
7a1218a2 4632 if (IS_ERR(task))
a5d16a4d 4633 return PTR_ERR(task);
a5d16a4d
TM		 4634 ret = nfs4_wait_for_completion_rpc_task(task);
4635 if (ret == 0) {
4636 ret = data->rpc_status;
2bee72a6
TM		 4637 if (ret)
4638 nfs4_handle_setlk_error(data->server, data->lsp,
4639 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4640 } else
4641 data->cancelled = 1;
e6b3c4db 4642 rpc_put_task(task);
3110ff80 4643 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4644 return ret;
1da177e4
LT		 4645}
4646
4647static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4648{
202b50dc 4649 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4650 struct nfs4_exception exception = {
4651 .inode = state->inode,
4652 };
202b50dc
TM		 4653 int err;
4654
4655 do {
42a2d13e
TM		 4656 /* Cache the lock if possible... */
4657 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4658 return 0;
afe6c27c 4659 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4660 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4661 break;
4662 nfs4_handle_exception(server, err, &exception);
4663 } while (exception.retry);
4664 return err;
1da177e4
LT		 4665}
4666
4667static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4668{
202b50dc 4669 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4670 struct nfs4_exception exception = {
4671 .inode = state->inode,
4672 };
202b50dc
TM		 4673 int err;
4674
6bfc93ef
TM		 4675 err = nfs4_set_lock_state(state, request);
4676 if (err != 0)
4677 return err;
202b50dc 4678 do {
42a2d13e
TM		 4679 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4680 return 0;
afe6c27c 4681 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4682 switch (err) {
4683 default:
4684 goto out;
4685 case -NFS4ERR_GRACE:
4686 case -NFS4ERR_DELAY:
4687 nfs4_handle_exception(server, err, &exception);
4688 err = 0;
4689 }
202b50dc 4690 } while (exception.retry);
a9ed2e25 4691out:
202b50dc 4692 return err;
1da177e4
LT		 4693}
4694
f062eb6c 4695#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4696static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4697{
b01dd1d8
BS		 4698 int status, ret = NFS_OK;
4699 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4700 struct nfs_server *server = NFS_SERVER(state->inode);
4701
b01dd1d8
BS		 4702 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4703 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4704 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4705 if (status != NFS_OK) {
4706 nfs41_free_stateid(server, &lsp->ls_stateid);
4707 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4708 ret = status;
4709 }
4710 }
4711 };
4712
4713 return ret;
4714}
4715
4716static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4717{
4718 int status = NFS_OK;
4719
4720 if (test_bit(LK_STATE_IN_USE, &state->flags))
4721 status = nfs41_check_expired_locks(state);
f062eb6c 4722 if (status == NFS_OK)
b01dd1d8 4723 return status;
f062eb6c
BS		 4724 return nfs4_lock_expired(state, request);
4725}
4726#endif
4727
1da177e4
LT		 4728static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4729{
19e03c57 4730 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4731 unsigned char fl_flags = request->fl_flags;
8e469ebd 4732 int status = -ENOLCK;
1da177e4 4733
8e469ebd
TM		 4734 if ((fl_flags & FL_POSIX) &&
4735 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4736 goto out;
6bfc93ef 4737 /* Is this a delegated open? */
6bfc93ef
TM		 4738 status = nfs4_set_lock_state(state, request);
4739 if (status != 0)
4740 goto out;
01c3b861
TM		 4741 request->fl_flags |= FL_ACCESS;
4742 status = do_vfs_lock(request->fl_file, request);
4743 if (status < 0)
4744 goto out;
19e03c57 4745 down_read(&nfsi->rwsem);
01c3b861 4746 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4747 /* Yes: cache locks! */
01c3b861 4748 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4749 request->fl_flags = fl_flags & ~FL_SLEEP;
4750 status = do_vfs_lock(request->fl_file, request);
4751 goto out_unlock;
01c3b861 4752 }
afe6c27c 4753 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4754 if (status != 0)
01c3b861 4755 goto out_unlock;
6bfc93ef 4756 /* Note: we always want to sleep here! */
01c3b861 4757 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4758 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4759 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4760 "manager!\n", __func__);
01c3b861 4761out_unlock:
19e03c57 4762 up_read(&nfsi->rwsem);
01c3b861
TM		 4763out:
4764 request->fl_flags = fl_flags;
1da177e4
LT		 4765 return status;
4766}
4767
4768static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4769{
a1d0b5ee
TM		 4770 struct nfs4_exception exception = {
4771 .state = state,
05ffe24f 4772 .inode = state->inode,
a1d0b5ee 4773 };
1da177e4
LT		 4774 int err;
4775
4776 do {
965b5d67
TM		 4777 err = _nfs4_proc_setlk(state, cmd, request);
4778 if (err == -NFS4ERR_DENIED)
4779 err = -EAGAIN;
1da177e4 4780 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4781 err, &exception);
1da177e4
LT		 4782 } while (exception.retry);
4783 return err;
4784}
4785
4786static int
4787nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4788{
4789 struct nfs_open_context *ctx;
4790 struct nfs4_state *state;
4791 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4792 int status;
4793
4794 /* verify open state */
cd3758e3 4795 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4796 state = ctx->state;
4797
4798 if (request->fl_start < 0 || request->fl_end < 0)
4799 return -EINVAL;
4800
d953126a
TM		 4801 if (IS_GETLK(cmd)) {
4802 if (state != NULL)
4803 return nfs4_proc_getlk(state, F_GETLK, request);
4804 return 0;
4805 }
1da177e4
LT		 4806
4807 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4808 return -EINVAL;
4809
d953126a
TM		 4810 if (request->fl_type == F_UNLCK) {
4811 if (state != NULL)
4812 return nfs4_proc_unlck(state, cmd, request);
4813 return 0;
4814 }
1da177e4 4815
d953126a
TM		 4816 if (state == NULL)
4817 return -ENOLCK;
55725513
TM		 4818 /*
4819 * Don't rely on the VFS having checked the file open mode,
4820 * since it won't do this for flock() locks.
4821 */
4822 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4823 case F_RDLCK:
4824 if (!(filp->f_mode & FMODE_READ))
4825 return -EBADF;
4826 break;
4827 case F_WRLCK:
4828 if (!(filp->f_mode & FMODE_WRITE))
4829 return -EBADF;
4830 }
4831
1da177e4
LT		 4832 do {
4833 status = nfs4_proc_setlk(state, cmd, request);
4834 if ((status != -EAGAIN) || IS_SETLK(cmd))
4835 break;
4836 timeout = nfs4_set_lock_task_retry(timeout);
4837 status = -ERESTARTSYS;
4838 if (signalled())
4839 break;
4840 } while(status < 0);
1da177e4
LT		 4841 return status;
4842}
4843
888e694c
TM		 4844int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4845{
4846 struct nfs_server *server = NFS_SERVER(state->inode);
4847 struct nfs4_exception exception = { };
4848 int err;
4849
4850 err = nfs4_set_lock_state(state, fl);
4851 if (err != 0)
4852 goto out;
4853 do {
afe6c27c 4854 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4855 switch (err) {
4856 default:
a030889a
WAA		 4857 printk(KERN_ERR "NFS: %s: unhandled error "
4858 "%d.\n", __func__, err);
d5122201 4859 case 0:
965b5d67 4860 case -ESTALE:
d5122201
TM		 4861 goto out;
4862 case -NFS4ERR_EXPIRED:
0ced63d1 4863 nfs4_schedule_stateid_recovery(server, state);
d5122201 4864 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4865 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4866 nfs4_schedule_lease_recovery(server->nfs_client);
4867 goto out;
74e7bb73
RL		 4868 case -NFS4ERR_BADSESSION:
4869 case -NFS4ERR_BADSLOT:
4870 case -NFS4ERR_BAD_HIGH_SLOT:
4871 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4872 case -NFS4ERR_DEADSESSION:
9f594791 4873 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4874 goto out;
965b5d67
TM		 4875 case -ERESTARTSYS:
4876 /*
4877 * The show must go on: exit, but mark the
4878 * stateid as needing recovery.
4879 */
a1d0b5ee 4880 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4881 case -NFS4ERR_ADMIN_REVOKED:
4882 case -NFS4ERR_BAD_STATEID:
4883 case -NFS4ERR_OPENMODE:
0400a6b0 4884 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4885 err = 0;
4886 goto out;
168667c4
TM		 4887 case -EKEYEXPIRED:
4888 /*
4889 * User RPCSEC_GSS context has expired.
4890 * We cannot recover this stateid now, so
4891 * skip it and allow recovery thread to
4892 * proceed.
4893 */
4894 err = 0;
4895 goto out;
965b5d67
TM		 4896 case -ENOMEM:
4897 case -NFS4ERR_DENIED:
4898 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4899 err = 0;
4900 goto out;
d5122201
TM		 4901 case -NFS4ERR_DELAY:
4902 break;
4903 }
888e694c
TM		 4904 err = nfs4_handle_exception(server, err, &exception);
4905 } while (exception.retry);
4906out:
4907 return err;
4908}
6b3b5496 4909
cf470c3e
TM		 4910struct nfs_release_lockowner_data {
4911 struct nfs4_lock_state *lsp;
5ae67c4f 4912 struct nfs_server *server;
cf470c3e
TM		 4913 struct nfs_release_lockowner_args args;
4914};
4915
d3c7b7cc
TM		 4916static void nfs4_release_lockowner_release(void *calldata)
4917{
cf470c3e 4918 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4919 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4920 kfree(calldata);
4921}
4922
17280175 4923static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4924 .rpc_release = nfs4_release_lockowner_release,
4925};
4926
cf470c3e 4927int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4928{
4929 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4930 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4933 };
4934
4935 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4936 return -EINVAL;
4937 data = kmalloc(sizeof(*data), GFP_NOFS);
4938 if (!data)
4939 return -ENOMEM;
4940 data->lsp = lsp;
5ae67c4f 4941 data->server = server;
cf470c3e
TM		 4942 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4943 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4944 data->args.lock_owner.s_dev = server->s_dev;
4945 msg.rpc_argp = &data->args;
4946 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4947 return 0;
d3c7b7cc
TM		 4948}
4949
aa1870af
BF		 4950#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4951
64c2ce8b
AK		 4952static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4953 const void *buf, size_t buflen,
4954 int flags, int type)
6b3b5496 4955{
64c2ce8b
AK		 4956 if (strcmp(key, "") != 0)
4957 return -EINVAL;
4b580ee3 4958
64c2ce8b 4959 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4960}
4961
64c2ce8b
AK		 4962static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4963 void *buf, size_t buflen, int type)
6b3b5496 4964{
64c2ce8b
AK		 4965 if (strcmp(key, "") != 0)
4966 return -EINVAL;
aa1870af 4967
64c2ce8b 4968 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4969}
4970
64c2ce8b
AK		 4971static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4972 size_t list_len, const char *name,
4973 size_t name_len, int type)
6b3b5496 4974{
64c2ce8b 4975 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4976
096455a2
BF		 4977 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4978 return 0;
64c2ce8b
AK		 4979
4980 if (list && len <= list_len)
4981 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4982 return len;
6b3b5496
BF		 4983}
4984
533eb461
AA		 4985/*
4986 * nfs_fhget will use either the mounted_on_fileid or the fileid
4987 */
69aaaae1
TM		 4988static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4989{
533eb461
AA		 4990 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4991 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4992 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4993 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4994 return;
4995
4996 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4997 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4998 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4999 fattr->nlink = 2;
5000}
5001
f05d147f
BS		 5002static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5003 const struct qstr *name,
5004 struct nfs4_fs_locations *fs_locations,
5005 struct page *page)
683b57b4
TM		 5006{
5007 struct nfs_server *server = NFS_SERVER(dir);
5008 u32 bitmask[2] = {
361e624f 5009 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5010 };
5011 struct nfs4_fs_locations_arg args = {
5012 .dir_fh = NFS_FH(dir),
c228fd3a 5013 .name = name,
683b57b4
TM		 5014 .page = page,
5015 .bitmask = bitmask,
5016 };
22958463
BH		 5017 struct nfs4_fs_locations_res res = {
5018 .fs_locations = fs_locations,
5019 };
683b57b4
TM		 5020 struct rpc_message msg = {
5021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5022 .rpc_argp = &args,
22958463 5023 .rpc_resp = &res,
683b57b4
TM		 5024 };
5025 int status;
5026
3110ff80 5027 dprintk("%s: start\n", __func__);
533eb461
AA		 5028
5029 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5030 * is not supported */
5031 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5032 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5033 else
5034 bitmask[0] |= FATTR4_WORD0_FILEID;
5035
c228fd3a 5036 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5037 fs_locations->server = server;
830b8e33 5038 fs_locations->nlocations = 0;
f05d147f 5039 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5040 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5041 return status;
5042}
5043
f05d147f
BS		 5044int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5045 const struct qstr *name,
5046 struct nfs4_fs_locations *fs_locations,
5047 struct page *page)
db0a9593
BS		 5048{
5049 struct nfs4_exception exception = { };
5050 int err;
5051 do {
5052 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5053 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5054 &exception);
5055 } while (exception.retry);
5056 return err;
5057}
5058
5a5ea0d4
BS		 5059static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5060{
5061 int status;
5062 struct nfs4_secinfo_arg args = {
5063 .dir_fh = NFS_FH(dir),
5064 .name = name,
5065 };
5066 struct nfs4_secinfo_res res = {
5067 .flavors = flavors,
5068 };
5069 struct rpc_message msg = {
5070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5071 .rpc_argp = &args,
5072 .rpc_resp = &res,
5073 };
5074
5075 dprintk("NFS call secinfo %s\n", name->name);
5076 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5077 dprintk("NFS reply secinfo: %d\n", status);
5078 return status;
5079}
5080
72de53ec
BS		 5081int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5082 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5083{
5084 struct nfs4_exception exception = { };
5085 int err;
5086 do {
5087 err = nfs4_handle_exception(NFS_SERVER(dir),
5088 _nfs4_proc_secinfo(dir, name, flavors),
5089 &exception);
5090 } while (exception.retry);
5091 return err;
5092}
5093
557134a3 5094#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5095/*
5096 * Check the exchange flags returned by the server for invalid flags, having
5097 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5098 * DS flags set.
5099 */
5100static int nfs4_check_cl_exchange_flags(u32 flags)
5101{
5102 if (flags & ~EXCHGID4_FLAG_MASK_R)
5103 goto out_inval;
5104 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5105 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5106 goto out_inval;
5107 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5108 goto out_inval;
5109 return NFS_OK;
5110out_inval:
5111 return -NFS4ERR_INVAL;
5112}
5113
78fe0f41 5114static bool
79d4e1f0
CL		 5115nfs41_same_server_scope(struct nfs41_server_scope *a,
5116 struct nfs41_server_scope *b)
78fe0f41
WAA		 5117{
5118 if (a->server_scope_sz == b->server_scope_sz &&
5119 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5120 return true;
5121
5122 return false;
5123}
5124
7c44f1ae
WAA		 5125/*
5126 * nfs4_proc_bind_conn_to_session()
5127 *
5128 * The 4.1 client currently uses the same TCP connection for the
5129 * fore and backchannel.
5130 */
2cf047c9 5131int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5132{
5133 int status;
5134 struct nfs41_bind_conn_to_session_res res;
5135 struct rpc_message msg = {
5136 .rpc_proc =
5137 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5138 .rpc_argp = clp,
5139 .rpc_resp = &res,
2cf047c9 5140 .rpc_cred = cred,
7c44f1ae
WAA		 5141 };
5142
5143 dprintk("--> %s\n", __func__);
5144 BUG_ON(clp == NULL);
5145
5146 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5147 if (unlikely(res.session == NULL)) {
5148 status = -ENOMEM;
5149 goto out;
5150 }
5151
5152 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5153 if (status == 0) {
5154 if (memcmp(res.session->sess_id.data,
5155 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5156 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5157 status = -EIO;
5158 goto out_session;
5159 }
5160 if (res.dir != NFS4_CDFS4_BOTH) {
5161 dprintk("NFS: %s: Unexpected direction from server\n",
5162 __func__);
5163 status = -EIO;
5164 goto out_session;
5165 }
5166 if (res.use_conn_in_rdma_mode) {
5167 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5168 __func__);
5169 status = -EIO;
5170 goto out_session;
5171 }
5172 }
5173out_session:
5174 kfree(res.session);
5175out:
5176 dprintk("<-- %s status= %d\n", __func__, status);
5177 return status;
5178}
5179
99fe60d0
BH		 5180/*
5181 * nfs4_proc_exchange_id()
5182 *
5183 * Since the clientid has expired, all compounds using sessions
5184 * associated with the stale clientid will be returning
5185 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5186 * be in some phase of session reset.
5187 */
4d643d1d 5188int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5189{
5190 nfs4_verifier verifier;
5191 struct nfs41_exchange_id_args args = {
cd93710e 5192 .verifier = &verifier,
99fe60d0 5193 .client = clp,
357f54d6 5194 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5195 };
5196 struct nfs41_exchange_id_res res = {
32b01310 5197 0
99fe60d0
BH		 5198 };
5199 int status;
5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5202 .rpc_argp = &args,
5203 .rpc_resp = &res,
5204 .rpc_cred = cred,
5205 };
99fe60d0
BH		 5206
5207 dprintk("--> %s\n", __func__);
5208 BUG_ON(clp == NULL);
a7b72103 5209
f092075d 5210 nfs4_init_boot_verifier(clp, &verifier);
99fe60d0 5211
c7a360b0 5212 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5213 "%s/%s/%u",
c7a360b0 5214 clp->cl_ipaddr,
3617e503 5215 clp->cl_rpcclient->cl_nodename,
c7a360b0 5216 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5217
acdeb69d 5218 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5219 GFP_NOFS);
acdeb69d 5220 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5221 status = -ENOMEM;
5222 goto out;
5223 }
78fe0f41 5224
79d4e1f0 5225 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5226 GFP_NOFS);
177313f1 5227 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5228 status = -ENOMEM;
acdeb69d 5229 goto out_server_owner;
abe9a6d5 5230 }
78fe0f41 5231
bbafffd2 5232 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5233 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5234 status = -ENOMEM;
5235 goto out_server_scope;
5236 }
5237
1bd714f2 5238 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5239 if (status == 0)
32b01310 5240 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5241
acdeb69d 5242 if (status == 0) {
32b01310
TM		 5243 clp->cl_clientid = res.clientid;
5244 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5245 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5246 clp->cl_seqid = res.seqid;
5247
acdeb69d
CL		 5248 kfree(clp->cl_serverowner);
5249 clp->cl_serverowner = res.server_owner;
5250 res.server_owner = NULL;
78fe0f41 5251
7d2ed9ac 5252 /* use the most recent implementation id */
59155546
CL		 5253 kfree(clp->cl_implid);
5254 clp->cl_implid = res.impl_id;
7d2ed9ac 5255
177313f1 5256 if (clp->cl_serverscope != NULL &&
79d4e1f0 5257 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5258 res.server_scope)) {
5259 dprintk("%s: server_scope mismatch detected\n",
5260 __func__);
5261 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5262 kfree(clp->cl_serverscope);
5263 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5264 }
5265
177313f1 5266 if (clp->cl_serverscope == NULL) {
79d4e1f0 5267 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5268 goto out;
5269 }
32b01310
TM		 5270 } else
5271 kfree(res.impl_id);
7d2ed9ac 5272
acdeb69d
CL		 5273out_server_owner:
5274 kfree(res.server_owner);
7d2ed9ac 5275out_server_scope:
abe9a6d5
WAA		 5276 kfree(res.server_scope);
5277out:
177313f1 5278 if (clp->cl_implid != NULL)
7d2ed9ac
WAA		 5279 dprintk("%s: Server Implementation ID: "
5280 "domain: %s, name: %s, date: %llu,%u\n",
59155546
CL		 5281 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5282 clp->cl_implid->date.seconds,
5283 clp->cl_implid->date.nseconds);
99fe60d0
BH		 5284 dprintk("<-- %s status= %d\n", __func__, status);
5285 return status;
5286}
5287
66245539
TM		 5288static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5289 struct rpc_cred *cred)
5290{
5291 struct rpc_message msg = {
5292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5293 .rpc_argp = clp,
5294 .rpc_cred = cred,
5295 };
5296 int status;
5297
5298 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5299 if (status)
5300 pr_warn("NFS: Got error %d from the server %s on "
5301 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5302 return status;
5303}
5304
5305static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5306 struct rpc_cred *cred)
5307{
5308 unsigned int loop;
5309 int ret;
5310
5311 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5312 ret = _nfs4_proc_destroy_clientid(clp, cred);
5313 switch (ret) {
5314 case -NFS4ERR_DELAY:
5315 case -NFS4ERR_CLIENTID_BUSY:
5316 ssleep(1);
5317 break;
5318 default:
5319 return ret;
5320 }
5321 }
5322 return 0;
5323}
5324
5325int nfs4_destroy_clientid(struct nfs_client *clp)
5326{
5327 struct rpc_cred *cred;
5328 int ret = 0;
5329
5330 if (clp->cl_mvops->minor_version < 1)
5331 goto out;
5332 if (clp->cl_exchange_flags == 0)
5333 goto out;
5334 cred = nfs4_get_exchange_id_cred(clp);
5335 ret = nfs4_proc_destroy_clientid(clp, cred);
5336 if (cred)
5337 put_rpccred(cred);
5338 switch (ret) {
5339 case 0:
5340 case -NFS4ERR_STALE_CLIENTID:
5341 clp->cl_exchange_flags = 0;
5342 }
5343out:
5344 return ret;
5345}
5346
2050f0cc
AA		 5347struct nfs4_get_lease_time_data {
5348 struct nfs4_get_lease_time_args *args;
5349 struct nfs4_get_lease_time_res *res;
5350 struct nfs_client *clp;
5351};
5352
5353static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5354 void *calldata)
5355{
5356 int ret;
5357 struct nfs4_get_lease_time_data *data =
5358 (struct nfs4_get_lease_time_data *)calldata;
5359
5360 dprintk("--> %s\n", __func__);
689cf5c1 5361 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5362 /* just setup sequence, do not trigger session recovery
5363 since we're invoked within one */
5364 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5365 &data->args->la_seq_args,
9d12b216 5366 &data->res->lr_seq_res, task);
2050f0cc
AA		 5367
5368 BUG_ON(ret == -EAGAIN);
5369 rpc_call_start(task);
5370 dprintk("<-- %s\n", __func__);
5371}
5372
5373/*
5374 * Called from nfs4_state_manager thread for session setup, so don't recover
5375 * from sequence operation or clientid errors.
5376 */
5377static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5378{
5379 struct nfs4_get_lease_time_data *data =
5380 (struct nfs4_get_lease_time_data *)calldata;
5381
5382 dprintk("--> %s\n", __func__);
14516c3a
TM		 5383 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5384 return;
2050f0cc
AA		 5385 switch (task->tk_status) {
5386 case -NFS4ERR_DELAY:
5387 case -NFS4ERR_GRACE:
5388 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5389 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5390 task->tk_status = 0;
a8a4ae3a
AA		 5391 /* fall through */
5392 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5393 rpc_restart_call_prepare(task);
2050f0cc
AA		 5394 return;
5395 }
2050f0cc
AA		 5396 dprintk("<-- %s\n", __func__);
5397}
5398
17280175 5399static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5400 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5401 .rpc_call_done = nfs4_get_lease_time_done,
5402};
5403
5404int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5405{
5406 struct rpc_task *task;
5407 struct nfs4_get_lease_time_args args;
5408 struct nfs4_get_lease_time_res res = {
5409 .lr_fsinfo = fsinfo,
5410 };
5411 struct nfs4_get_lease_time_data data = {
5412 .args = &args,
5413 .res = &res,
5414 .clp = clp,
5415 };
5416 struct rpc_message msg = {
5417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5418 .rpc_argp = &args,
5419 .rpc_resp = &res,
5420 };
5421 struct rpc_task_setup task_setup = {
5422 .rpc_client = clp->cl_rpcclient,
5423 .rpc_message = &msg,
5424 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5425 .callback_data = &data,
5426 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5427 };
5428 int status;
5429
9d12b216 5430 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5431 dprintk("--> %s\n", __func__);
5432 task = rpc_run_task(&task_setup);
5433
5434 if (IS_ERR(task))
5435 status = PTR_ERR(task);
5436 else {
5437 status = task->tk_status;
5438 rpc_put_task(task);
5439 }
5440 dprintk("<-- %s return %d\n", __func__, status);
5441
5442 return status;
5443}
5444
f86f36a6
TM		 5445static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5446{
5447 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5448}
5449
5450static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5451 struct nfs4_slot *new,
5452 u32 max_slots,
5453 u32 ivalue)
5454{
5455 struct nfs4_slot *old = NULL;
5456 u32 i;
5457
5458 spin_lock(&tbl->slot_tbl_lock);
5459 if (new) {
5460 old = tbl->slots;
5461 tbl->slots = new;
5462 tbl->max_slots = max_slots;
5463 }
5464 tbl->highest_used_slotid = -1; /* no slot is currently used */
5465 for (i = 0; i < tbl->max_slots; i++)
5466 tbl->slots[i].seq_nr = ivalue;
5467 spin_unlock(&tbl->slot_tbl_lock);
5468 kfree(old);
5469}
5470
b73dafa7 5471/*
f86f36a6 5472 * (re)Initialise a slot table
b73dafa7 5473 */
f86f36a6
TM		 5474static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5475 u32 ivalue)
ac72b7b3 5476{
104aeba4 5477 struct nfs4_slot *new = NULL;
f86f36a6 5478 int ret = -ENOMEM;
ac72b7b3 5479
104aeba4
AA		 5480 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5481 max_reqs, tbl->max_slots);
ac72b7b3 5482
104aeba4
AA		 5483 /* Does the newly negotiated max_reqs match the existing slot table? */
5484 if (max_reqs != tbl->max_slots) {
f86f36a6 5485 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5486 if (!new)
5487 goto out;
104aeba4 5488 }
f86f36a6
TM		 5489 ret = 0;
5490
5491 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5492 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5493 tbl, tbl->slots, tbl->max_slots);
5494out:
5495 dprintk("<-- %s: return %d\n", __func__, ret);
5496 return ret;
5497}
5498
f8625a6a
RL		 5499/* Destroy the slot table */
5500static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5501{
5502 if (session->fc_slot_table.slots != NULL) {
5503 kfree(session->fc_slot_table.slots);
5504 session->fc_slot_table.slots = NULL;
5505 }
5506 if (session->bc_slot_table.slots != NULL) {
5507 kfree(session->bc_slot_table.slots);
5508 session->bc_slot_table.slots = NULL;
5509 }
5510 return;
5511}
5512
050047ce 5513/*
aacd5537 5514 * Initialize or reset the forechannel and backchannel tables
050047ce 5515 */
aacd5537 5516static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5517{
f26468fb 5518 struct nfs4_slot_table *tbl;
aacd5537 5519 int status;
050047ce 5520
aacd5537
AA		 5521 dprintk("--> %s\n", __func__);
5522 /* Fore channel */
5523 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5524 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5525 if (status) /* -ENOMEM */
5526 return status;
aacd5537
AA		 5527 /* Back channel */
5528 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5529 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5530 if (status && tbl->slots == NULL)
5531 /* Fore and back channel share a connection so get
5532 * both slot tables or neither */
5533 nfs4_destroy_slot_tables(ses);
f8625a6a 5534 return status;
557134a3
AA		 5535}
5536
5537struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5538{
5539 struct nfs4_session *session;
5540 struct nfs4_slot_table *tbl;
5541
8535b2be 5542 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5543 if (!session)
5544 return NULL;
76db6d95 5545
557134a3 5546 tbl = &session->fc_slot_table;
45d43c29 5547 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5548 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5549 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5550 init_completion(&tbl->complete);
f8625a6a
RL		 5551
5552 tbl = &session->bc_slot_table;
45d43c29 5553 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5554 spin_lock_init(&tbl->slot_tbl_lock);
5555 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5556 init_completion(&tbl->complete);
f8625a6a 5557
1055d76d
TM		 5558 session->session_state = 1<<NFS4_SESSION_INITING;
5559
557134a3
AA		 5560 session->clp = clp;
5561 return session;
5562}
5563
5564void nfs4_destroy_session(struct nfs4_session *session)
5565{
2446ab60 5566 struct rpc_xprt *xprt;
848f5bda 5567 struct rpc_cred *cred;
2446ab60 5568
848f5bda
TM		 5569 cred = nfs4_get_exchange_id_cred(session->clp);
5570 nfs4_proc_destroy_session(session, cred);
5571 if (cred)
5572 put_rpccred(cred);
2446ab60
TM		 5573
5574 rcu_read_lock();
5575 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5576 rcu_read_unlock();
5a0ffe54 5577 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5578 __func__, xprt);
5579 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5580 nfs4_destroy_slot_tables(session);
557134a3
AA		 5581 kfree(session);
5582}
5583
fc931582
AA		 5584/*
5585 * Initialize the values to be used by the client in CREATE_SESSION
5586 * If nfs4_init_session set the fore channel request and response sizes,
5587 * use them.
5588 *
5589 * Set the back channel max_resp_sz_cached to zero to force the client to
5590 * always set csa_cachethis to FALSE because the current implementation
5591 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5592 */
5593static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5594{
5595 struct nfs4_session *session = args->client->cl_session;
5596 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5597 mxresp_sz = session->fc_attrs.max_resp_sz;
5598
5599 if (mxrqst_sz == 0)
5600 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5601 if (mxresp_sz == 0)
5602 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5603 /* Fore channel attributes */
fc931582
AA		 5604 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5605 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5606 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5607 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5608
5609 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5610 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5611 __func__,
5612 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5613 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5614
5615 /* Back channel attributes */
fc931582
AA		 5616 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5617 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5618 args->bc_attrs.max_resp_sz_cached = 0;
5619 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5620 args->bc_attrs.max_reqs = 1;
5621
5622 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5623 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5624 __func__,
5625 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5626 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5627 args->bc_attrs.max_reqs);
5628}
5629
43c2e885 5630static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5631{
43c2e885
BF		 5632 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5633 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5634
43c2e885
BF		 5635 if (rcvd->max_resp_sz > sent->max_resp_sz)
5636 return -EINVAL;
5637 /*
5638 * Our requested max_ops is the minimum we need; we're not
5639 * prepared to break up compounds into smaller pieces than that.
5640 * So, no point even trying to continue if the server won't
5641 * cooperate:
5642 */
5643 if (rcvd->max_ops < sent->max_ops)
5644 return -EINVAL;
5645 if (rcvd->max_reqs == 0)
5646 return -EINVAL;
b4b9a0c1
VG		 5647 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5648 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5649 return 0;
8d35301d
AA		 5650}
5651
43c2e885
BF		 5652static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5653{
5654 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5655 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5656
43c2e885
BF		 5657 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5658 return -EINVAL;
5659 if (rcvd->max_resp_sz < sent->max_resp_sz)
5660 return -EINVAL;
5661 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5662 return -EINVAL;
5663 /* These would render the backchannel useless: */
b4b9a0c1 5664 if (rcvd->max_ops != sent->max_ops)
43c2e885 5665 return -EINVAL;
b4b9a0c1 5666 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5667 return -EINVAL;
5668 return 0;
5669}
8d35301d 5670
8d35301d
AA		 5671static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5672 struct nfs4_session *session)
5673{
43c2e885 5674 int ret;
8d35301d 5675
43c2e885
BF		 5676 ret = nfs4_verify_fore_channel_attrs(args, session);
5677 if (ret)
5678 return ret;
5679 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5680}
5681
848f5bda
TM		 5682static int _nfs4_proc_create_session(struct nfs_client *clp,
5683 struct rpc_cred *cred)
fc931582
AA		 5684{
5685 struct nfs4_session *session = clp->cl_session;
5686 struct nfs41_create_session_args args = {
5687 .client = clp,
5688 .cb_program = NFS4_CALLBACK,
5689 };
5690 struct nfs41_create_session_res res = {
5691 .client = clp,
5692 };
5693 struct rpc_message msg = {
5694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5695 .rpc_argp = &args,
5696 .rpc_resp = &res,
848f5bda 5697 .rpc_cred = cred,
fc931582
AA		 5698 };
5699 int status;
5700
5701 nfs4_init_channel_attrs(&args);
0f91421e 5702 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5703
1bd714f2 5704 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5705
8d35301d
AA		 5706 if (!status)
5707 /* Verify the session's negotiated channel_attrs values */
5708 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5709 if (!status) {
5710 /* Increment the clientid slot sequence id */
5711 clp->cl_seqid++;
5712 }
5713
5714 return status;
5715}
5716
5717/*
5718 * Issues a CREATE_SESSION operation to the server.
5719 * It is the responsibility of the caller to verify the session is
5720 * expired before calling this routine.
5721 */
848f5bda 5722int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5723{
5724 int status;
5725 unsigned *ptr;
fc931582
AA		 5726 struct nfs4_session *session = clp->cl_session;
5727
5728 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5729
848f5bda 5730 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5731 if (status)
5732 goto out;
5733
aacd5537
AA		 5734 /* Init or reset the session slot tables */
5735 status = nfs4_setup_session_slot_tables(session);
5736 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5737 if (status)
5738 goto out;
5739
5740 ptr = (unsigned *)&session->sess_id.data[0];
5741 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5742 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5743out:
5744 dprintk("<-- %s\n", __func__);
5745 return status;
5746}
5747
0f3e66c6
AA		 5748/*
5749 * Issue the over-the-wire RPC DESTROY_SESSION.
5750 * The caller must serialize access to this routine.
5751 */
848f5bda
TM		 5752int nfs4_proc_destroy_session(struct nfs4_session *session,
5753 struct rpc_cred *cred)
0f3e66c6 5754{
848f5bda
TM		 5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5757 .rpc_argp = session,
5758 .rpc_cred = cred,
5759 };
0f3e66c6 5760 int status = 0;
0f3e66c6
AA		 5761
5762 dprintk("--> nfs4_proc_destroy_session\n");
5763
5764 /* session is still being setup */
5765 if (session->clp->cl_cons_state != NFS_CS_READY)
5766 return status;
5767
1bd714f2 5768 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5769
5770 if (status)
08106ac7 5771 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5772 "Session has been destroyed regardless...\n", status);
5773
5774 dprintk("<-- nfs4_proc_destroy_session\n");
5775 return status;
5776}
5777
7b38c368
TM		 5778/*
5779 * With sessions, the client is not marked ready until after a
5780 * successful EXCHANGE_ID and CREATE_SESSION.
5781 *
5782 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5783 * other versions of NFS can be tried.
5784 */
5785static int nfs41_check_session_ready(struct nfs_client *clp)
5786{
5787 int ret;
5788
5789 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5790 ret = nfs4_client_recover_expired_lease(clp);
5791 if (ret)
5792 return ret;
5793 }
5794 if (clp->cl_cons_state < NFS_CS_READY)
5795 return -EPROTONOSUPPORT;
54ac471c 5796 smp_rmb();
7b38c368
TM		 5797 return 0;
5798}
5799
fccba804
TM		 5800int nfs4_init_session(struct nfs_server *server)
5801{
5802 struct nfs_client *clp = server->nfs_client;
2449ea2e 5803 struct nfs4_session *session;
68bf05ef 5804 unsigned int rsize, wsize;
fccba804
TM		 5805
5806 if (!nfs4_has_session(clp))
5807 return 0;
5808
1055d76d 5809 session = clp->cl_session;
7b38c368
TM		 5810 spin_lock(&clp->cl_lock);
5811 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5812
7b38c368
TM		 5813 rsize = server->rsize;
5814 if (rsize == 0)
5815 rsize = NFS_MAX_FILE_IO_SIZE;
5816 wsize = server->wsize;
5817 if (wsize == 0)
5818 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5819
7b38c368
TM		 5820 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5821 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5822 }
5823 spin_unlock(&clp->cl_lock);
2449ea2e 5824
7b38c368 5825 return nfs41_check_session_ready(clp);
fccba804
TM		 5826}
5827
7b38c368 5828int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5829{
5830 struct nfs4_session *session = clp->cl_session;
5831 int ret;
5832
7b38c368
TM		 5833 spin_lock(&clp->cl_lock);
5834 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5835 /*
5836 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5837 * DS lease to be equal to the MDS lease.
5838 */
5839 clp->cl_lease_time = lease_time;
5840 clp->cl_last_renewal = jiffies;
5841 }
5842 spin_unlock(&clp->cl_lock);
d83217c1 5843
7b38c368
TM		 5844 ret = nfs41_check_session_ready(clp);
5845 if (ret)
5846 return ret;
5847 /* Test for the DS role */
5848 if (!is_ds_client(clp))
5849 return -ENODEV;
5850 return 0;
d83217c1
AA		 5851}
5852EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5853
5854
fc01cea9
AA		 5855/*
5856 * Renew the cl_session lease.
5857 */
d5f8d3fe
TM		 5858struct nfs4_sequence_data {
5859 struct nfs_client *clp;
5860 struct nfs4_sequence_args args;
5861 struct nfs4_sequence_res res;
5862};
5863
dc96aef9
AB		 5864static void nfs41_sequence_release(void *data)
5865{
d5f8d3fe
TM		 5866 struct nfs4_sequence_data *calldata = data;
5867 struct nfs_client *clp = calldata->clp;
dc96aef9 5868
7135840f
AB		 5869 if (atomic_read(&clp->cl_count) > 1)
5870 nfs4_schedule_state_renewal(clp);
5871 nfs_put_client(clp);
d5f8d3fe 5872 kfree(calldata);
dc96aef9
AB		 5873}
5874
aa5190d0
TM		 5875static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5876{
5877 switch(task->tk_status) {
5878 case -NFS4ERR_DELAY:
aa5190d0
TM		 5879 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5880 return -EAGAIN;
5881 default:
0400a6b0 5882 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5883 }
5884 return 0;
5885}
5886
dc96aef9 5887static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5888{
d5f8d3fe
TM		 5889 struct nfs4_sequence_data *calldata = data;
5890 struct nfs_client *clp = calldata->clp;
fc01cea9 5891
14516c3a
TM		 5892 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5893 return;
fc01cea9
AA		 5894
5895 if (task->tk_status < 0) {
5896 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5897 if (atomic_read(&clp->cl_count) == 1)
5898 goto out;
fc01cea9 5899
aa5190d0
TM		 5900 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5901 rpc_restart_call_prepare(task);
fc01cea9
AA		 5902 return;
5903 }
5904 }
fc01cea9 5905 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5906out:
fc01cea9
AA		 5907 dprintk("<-- %s\n", __func__);
5908}
5909
5910static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5911{
d5f8d3fe
TM		 5912 struct nfs4_sequence_data *calldata = data;
5913 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5914 struct nfs4_sequence_args *args;
5915 struct nfs4_sequence_res *res;
5916
fc01cea9
AA		 5917 args = task->tk_msg.rpc_argp;
5918 res = task->tk_msg.rpc_resp;
5919
9d12b216 5920 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5921 return;
5922 rpc_call_start(task);
5923}
5924
5925static const struct rpc_call_ops nfs41_sequence_ops = {
5926 .rpc_call_done = nfs41_sequence_call_done,
5927 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5928 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5929};
5930
71ac6da9 5931static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5932{
d5f8d3fe 5933 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5934 struct rpc_message msg = {
5935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5936 .rpc_cred = cred,
5937 };
71ac6da9
TM		 5938 struct rpc_task_setup task_setup_data = {
5939 .rpc_client = clp->cl_rpcclient,
5940 .rpc_message = &msg,
5941 .callback_ops = &nfs41_sequence_ops,
5942 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5943 };
fc01cea9 5944
7135840f 5945 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5946 return ERR_PTR(-EIO);
dfb4f309 5947 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5948 if (calldata == NULL) {
7135840f 5949 nfs_put_client(clp);
71ac6da9 5950 return ERR_PTR(-ENOMEM);
fc01cea9 5951 }
9d12b216 5952 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5953 msg.rpc_argp = &calldata->args;
5954 msg.rpc_resp = &calldata->res;
5955 calldata->clp = clp;
71ac6da9 5956 task_setup_data.callback_data = calldata;
fc01cea9 5957
71ac6da9
TM		 5958 return rpc_run_task(&task_setup_data);
5959}
5960
2f60ea6b 5961static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5962{
5963 struct rpc_task *task;
5964 int ret = 0;
5965
2f60ea6b
TM		 5966 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5967 return 0;
71ac6da9
TM		 5968 task = _nfs41_proc_sequence(clp, cred);
5969 if (IS_ERR(task))
5970 ret = PTR_ERR(task);
5971 else
bf294b41 5972 rpc_put_task_async(task);
71ac6da9
TM		 5973 dprintk("<-- %s status=%d\n", __func__, ret);
5974 return ret;
5975}
5976
5977static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5978{
5979 struct rpc_task *task;
5980 int ret;
5981
5982 task = _nfs41_proc_sequence(clp, cred);
5983 if (IS_ERR(task)) {
5984 ret = PTR_ERR(task);
5985 goto out;
5986 }
5987 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5988 if (!ret) {
5989 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5990
5991 if (task->tk_status == 0)
5992 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5993 ret = task->tk_status;
b4410c2f 5994 }
71ac6da9
TM		 5995 rpc_put_task(task);
5996out:
5997 dprintk("<-- %s status=%d\n", __func__, ret);
5998 return ret;
fc01cea9
AA		 5999}
6000
fce5c838
RL		 6001struct nfs4_reclaim_complete_data {
6002 struct nfs_client *clp;
6003 struct nfs41_reclaim_complete_args arg;
6004 struct nfs41_reclaim_complete_res res;
6005};
6006
6007static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6008{
6009 struct nfs4_reclaim_complete_data *calldata = data;
6010
b257957e 6011 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6012 if (nfs41_setup_sequence(calldata->clp->cl_session,
6013 &calldata->arg.seq_args,
9d12b216 6014 &calldata->res.seq_res, task))
fce5c838
RL		 6015 return;
6016
6017 rpc_call_start(task);
6018}
6019
aa5190d0
TM		 6020static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6021{
6022 switch(task->tk_status) {
6023 case 0:
6024 case -NFS4ERR_COMPLETE_ALREADY:
6025 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6026 break;
6027 case -NFS4ERR_DELAY:
aa5190d0 6028 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6029 /* fall through */
6030 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6031 return -EAGAIN;
6032 default:
0400a6b0 6033 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6034 }
6035 return 0;
6036}
6037
fce5c838
RL		 6038static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6039{
6040 struct nfs4_reclaim_complete_data *calldata = data;
6041 struct nfs_client *clp = calldata->clp;
6042 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6043
6044 dprintk("--> %s\n", __func__);
14516c3a
TM		 6045 if (!nfs41_sequence_done(task, res))
6046 return;
fce5c838 6047
aa5190d0
TM		 6048 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6049 rpc_restart_call_prepare(task);
6050 return;
6051 }
fce5c838
RL		 6052 dprintk("<-- %s\n", __func__);
6053}
6054
6055static void nfs4_free_reclaim_complete_data(void *data)
6056{
6057 struct nfs4_reclaim_complete_data *calldata = data;
6058
6059 kfree(calldata);
6060}
6061
6062static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6063 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6064 .rpc_call_done = nfs4_reclaim_complete_done,
6065 .rpc_release = nfs4_free_reclaim_complete_data,
6066};
6067
6068/*
6069 * Issue a global reclaim complete.
6070 */
6071static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6072{
6073 struct nfs4_reclaim_complete_data *calldata;
6074 struct rpc_task *task;
6075 struct rpc_message msg = {
6076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6077 };
6078 struct rpc_task_setup task_setup_data = {
6079 .rpc_client = clp->cl_rpcclient,
6080 .rpc_message = &msg,
6081 .callback_ops = &nfs4_reclaim_complete_call_ops,
6082 .flags = RPC_TASK_ASYNC,
6083 };
6084 int status = -ENOMEM;
6085
6086 dprintk("--> %s\n", __func__);
8535b2be 6087 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6088 if (calldata == NULL)
6089 goto out;
6090 calldata->clp = clp;
6091 calldata->arg.one_fs = 0;
fce5c838 6092
9d12b216 6093 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6094 msg.rpc_argp = &calldata->arg;
6095 msg.rpc_resp = &calldata->res;
6096 task_setup_data.callback_data = calldata;
6097 task = rpc_run_task(&task_setup_data);
acf82b85 6098 if (IS_ERR(task)) {
fce5c838 6099 status = PTR_ERR(task);
acf82b85
DC		 6100 goto out;
6101 }
c34c32ea
AA		 6102 status = nfs4_wait_for_completion_rpc_task(task);
6103 if (status == 0)
6104 status = task->tk_status;
fce5c838 6105 rpc_put_task(task);
acf82b85 6106 return 0;
fce5c838
RL		 6107out:
6108 dprintk("<-- %s status=%d\n", __func__, status);
6109 return status;
6110}
b1f69b75
AA		 6111
6112static void
6113nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6114{
6115 struct nfs4_layoutget *lgp = calldata;
c31663d4 6116 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6117
6118 dprintk("--> %s\n", __func__);
c31663d4
FI		 6119 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6120 * right now covering the LAYOUTGET we are about to send.
6121 * However, that is not so catastrophic, and there seems
6122 * to be no way to prevent it completely.
6123 */
b1f69b75 6124 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6125 &lgp->res.seq_res, task))
b1f69b75 6126 return;
cf7d63f1
FI		 6127 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6128 NFS_I(lgp->args.inode)->layout,
6129 lgp->args.ctx->state)) {
6130 rpc_exit(task, NFS4_OK);
6131 return;
6132 }
b1f69b75
AA		 6133 rpc_call_start(task);
6134}
6135
6136static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6137{
6138 struct nfs4_layoutget *lgp = calldata;
6139 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6140
6141 dprintk("--> %s\n", __func__);
6142
6143 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6144 return;
6145
6146 switch (task->tk_status) {
6147 case 0:
6148 break;
6149 case -NFS4ERR_LAYOUTTRYLATER:
6150 case -NFS4ERR_RECALLCONFLICT:
6151 task->tk_status = -NFS4ERR_DELAY;
6152 /* Fall through */
6153 default:
6154 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6155 rpc_restart_call_prepare(task);
6156 return;
6157 }
6158 }
b1f69b75
AA		 6159 dprintk("<-- %s\n", __func__);
6160}
6161
6162static void nfs4_layoutget_release(void *calldata)
6163{
6164 struct nfs4_layoutget *lgp = calldata;
6165
6166 dprintk("--> %s\n", __func__);
b1f69b75
AA		 6167 put_nfs_open_context(lgp->args.ctx);
6168 kfree(calldata);
6169 dprintk("<-- %s\n", __func__);
6170}
6171
6172static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6173 .rpc_call_prepare = nfs4_layoutget_prepare,
6174 .rpc_call_done = nfs4_layoutget_done,
6175 .rpc_release = nfs4_layoutget_release,
6176};
6177
6178int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6179{
6180 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6181 struct rpc_task *task;
6182 struct rpc_message msg = {
6183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6184 .rpc_argp = &lgp->args,
6185 .rpc_resp = &lgp->res,
6186 };
6187 struct rpc_task_setup task_setup_data = {
6188 .rpc_client = server->client,
6189 .rpc_message = &msg,
6190 .callback_ops = &nfs4_layoutget_call_ops,
6191 .callback_data = lgp,
6192 .flags = RPC_TASK_ASYNC,
6193 };
6194 int status = 0;
6195
6196 dprintk("--> %s\n", __func__);
6197
35124a09 6198 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6199 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6200 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6201 task = rpc_run_task(&task_setup_data);
6202 if (IS_ERR(task))
6203 return PTR_ERR(task);
6204 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6205 if (status == 0)
6206 status = task->tk_status;
6207 if (status == 0)
6208 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6209 rpc_put_task(task);
6210 dprintk("<-- %s status=%d\n", __func__, status);
6211 return status;
6212}
6213
cbe82603
BH		 6214static void
6215nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6216{
6217 struct nfs4_layoutreturn *lrp = calldata;
6218
6219 dprintk("--> %s\n", __func__);
6220 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6221 &lrp->res.seq_res, task))
cbe82603
BH		 6222 return;
6223 rpc_call_start(task);
6224}
6225
6226static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6227{
6228 struct nfs4_layoutreturn *lrp = calldata;
6229 struct nfs_server *server;
a56aaa02 6230 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6231
6232 dprintk("--> %s\n", __func__);
6233
6234 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6235 return;
6236
6237 server = NFS_SERVER(lrp->args.inode);
6238 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6239 rpc_restart_call_prepare(task);
cbe82603
BH		 6240 return;
6241 }
a2e1d4f2 6242 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6243 if (task->tk_status == 0) {
cbe82603 6244 if (lrp->res.lrs_present) {
cbe82603 6245 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6246 } else
6247 BUG_ON(!list_empty(&lo->plh_segs));
6248 }
a2e1d4f2
FI		 6249 lo->plh_block_lgets--;
6250 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6251 dprintk("<-- %s\n", __func__);
6252}
6253
6254static void nfs4_layoutreturn_release(void *calldata)
6255{
6256 struct nfs4_layoutreturn *lrp = calldata;
6257
6258 dprintk("--> %s\n", __func__);
a56aaa02 6259 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6260 kfree(calldata);
6261 dprintk("<-- %s\n", __func__);
6262}
6263
6264static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6265 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6266 .rpc_call_done = nfs4_layoutreturn_done,
6267 .rpc_release = nfs4_layoutreturn_release,
6268};
6269
6270int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6271{
6272 struct rpc_task *task;
6273 struct rpc_message msg = {
6274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6275 .rpc_argp = &lrp->args,
6276 .rpc_resp = &lrp->res,
6277 };
6278 struct rpc_task_setup task_setup_data = {
6279 .rpc_client = lrp->clp->cl_rpcclient,
6280 .rpc_message = &msg,
6281 .callback_ops = &nfs4_layoutreturn_call_ops,
6282 .callback_data = lrp,
6283 };
6284 int status;
6285
6286 dprintk("--> %s\n", __func__);
9d12b216 6287 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6288 task = rpc_run_task(&task_setup_data);
6289 if (IS_ERR(task))
6290 return PTR_ERR(task);
6291 status = task->tk_status;
6292 dprintk("<-- %s status=%d\n", __func__, status);
6293 rpc_put_task(task);
6294 return status;
6295}
6296
7f11d8d3
AA		 6297/*
6298 * Retrieve the list of Data Server devices from the MDS.
6299 */
6300static int _nfs4_getdevicelist(struct nfs_server *server,
6301 const struct nfs_fh *fh,
6302 struct pnfs_devicelist *devlist)
6303{
6304 struct nfs4_getdevicelist_args args = {
6305 .fh = fh,
6306 .layoutclass = server->pnfs_curr_ld->id,
6307 };
6308 struct nfs4_getdevicelist_res res = {
6309 .devlist = devlist,
6310 };
6311 struct rpc_message msg = {
6312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6313 .rpc_argp = &args,
6314 .rpc_resp = &res,
6315 };
6316 int status;
6317
6318 dprintk("--> %s\n", __func__);
6319 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6320 &res.seq_res, 0);
6321 dprintk("<-- %s status=%d\n", __func__, status);
6322 return status;
6323}
6324
6325int nfs4_proc_getdevicelist(struct nfs_server *server,
6326 const struct nfs_fh *fh,
6327 struct pnfs_devicelist *devlist)
6328{
6329 struct nfs4_exception exception = { };
6330 int err;
6331
6332 do {
6333 err = nfs4_handle_exception(server,
6334 _nfs4_getdevicelist(server, fh, devlist),
6335 &exception);
6336 } while (exception.retry);
6337
6338 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6339 err, devlist->num_devs);
6340
6341 return err;
6342}
6343EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6344
b1f69b75
AA		 6345static int
6346_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6347{
6348 struct nfs4_getdeviceinfo_args args = {
6349 .pdev = pdev,
6350 };
6351 struct nfs4_getdeviceinfo_res res = {
6352 .pdev = pdev,
6353 };
6354 struct rpc_message msg = {
6355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6356 .rpc_argp = &args,
6357 .rpc_resp = &res,
6358 };
6359 int status;
6360
6361 dprintk("--> %s\n", __func__);
7c513058 6362 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6363 dprintk("<-- %s status=%d\n", __func__, status);
6364
6365 return status;
6366}
6367
6368int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6369{
6370 struct nfs4_exception exception = { };
6371 int err;
6372
6373 do {
6374 err = nfs4_handle_exception(server,
6375 _nfs4_proc_getdeviceinfo(server, pdev),
6376 &exception);
6377 } while (exception.retry);
6378 return err;
6379}
6380EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6381
863a3c6c
AA		 6382static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6383{
6384 struct nfs4_layoutcommit_data *data = calldata;
6385 struct nfs_server *server = NFS_SERVER(data->args.inode);
6386
6387 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6388 &data->res.seq_res, task))
863a3c6c
AA		 6389 return;
6390 rpc_call_start(task);
6391}
6392
6393static void
6394nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6395{
6396 struct nfs4_layoutcommit_data *data = calldata;
6397 struct nfs_server *server = NFS_SERVER(data->args.inode);
6398
6399 if (!nfs4_sequence_done(task, &data->res.seq_res))
6400 return;
6401
6402 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6403 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6404 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6405 case -NFS4ERR_BADLAYOUT: /* no layout */
6406 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6407 task->tk_status = 0;
e59d27e0
TM		 6408 break;
6409 case 0:
863a3c6c
AA		 6410 nfs_post_op_update_inode_force_wcc(data->args.inode,
6411 data->res.fattr);
e59d27e0
TM		 6412 break;
6413 default:
6414 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6415 rpc_restart_call_prepare(task);
6416 return;
6417 }
6418 }
863a3c6c
AA		 6419}
6420
6421static void nfs4_layoutcommit_release(void *calldata)
6422{
6423 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6424 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6425 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6426
db29c089 6427 pnfs_cleanup_layoutcommit(data);
863a3c6c 6428 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6429 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6430 list_del_init(&lseg->pls_lc_list);
6431 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6432 &lseg->pls_flags))
6433 put_lseg(lseg);
6434 }
92407e75
PT		 6435
6436 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6437 smp_mb__after_clear_bit();
6438 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6439
863a3c6c
AA		 6440 put_rpccred(data->cred);
6441 kfree(data);
6442}
6443
6444static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6445 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6446 .rpc_call_done = nfs4_layoutcommit_done,
6447 .rpc_release = nfs4_layoutcommit_release,
6448};
6449
6450int
ef311537 6451nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6452{
6453 struct rpc_message msg = {
6454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6455 .rpc_argp = &data->args,
6456 .rpc_resp = &data->res,
6457 .rpc_cred = data->cred,
6458 };
6459 struct rpc_task_setup task_setup_data = {
6460 .task = &data->task,
6461 .rpc_client = NFS_CLIENT(data->args.inode),
6462 .rpc_message = &msg,
6463 .callback_ops = &nfs4_layoutcommit_ops,
6464 .callback_data = data,
6465 .flags = RPC_TASK_ASYNC,
6466 };
6467 struct rpc_task *task;
6468 int status = 0;
6469
6470 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6471 "lbw: %llu inode %lu\n",
6472 data->task.tk_pid, sync,
6473 data->args.lastbytewritten,
6474 data->args.inode->i_ino);
6475
9d12b216 6476 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6477 task = rpc_run_task(&task_setup_data);
6478 if (IS_ERR(task))
6479 return PTR_ERR(task);
ef311537 6480 if (sync == false)
863a3c6c
AA		 6481 goto out;
6482 status = nfs4_wait_for_completion_rpc_task(task);
6483 if (status != 0)
6484 goto out;
6485 status = task->tk_status;
6486out:
6487 dprintk("%s: status %d\n", __func__, status);
6488 rpc_put_task(task);
6489 return status;
6490}
fca78d6d
BS		 6491
6492static int
6493_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6494 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6495{
6496 struct nfs41_secinfo_no_name_args args = {
6497 .style = SECINFO_STYLE_CURRENT_FH,
6498 };
6499 struct nfs4_secinfo_res res = {
6500 .flavors = flavors,
6501 };
6502 struct rpc_message msg = {
6503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6504 .rpc_argp = &args,
6505 .rpc_resp = &res,
6506 };
6507 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6508}
6509
6510static int
6511nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6512 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6513{
6514 struct nfs4_exception exception = { };
6515 int err;
6516 do {
6517 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6518 switch (err) {
6519 case 0:
6520 case -NFS4ERR_WRONGSEC:
6521 case -NFS4ERR_NOTSUPP:
05e9cfb4 6522 goto out;
fca78d6d
BS		 6523 default:
6524 err = nfs4_handle_exception(server, err, &exception);
6525 }
6526 } while (exception.retry);
05e9cfb4 6527out:
fca78d6d
BS		 6528 return err;
6529}
6530
6531static int
6532nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6533 struct nfs_fsinfo *info)
6534{
6535 int err;
6536 struct page *page;
6537 rpc_authflavor_t flavor;
6538 struct nfs4_secinfo_flavors *flavors;
6539
6540 page = alloc_page(GFP_KERNEL);
6541 if (!page) {
6542 err = -ENOMEM;
6543 goto out;
6544 }
6545
6546 flavors = page_address(page);
6547 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6548
6549 /*
6550 * Fall back on "guess and check" method if
6551 * the server doesn't support SECINFO_NO_NAME
6552 */
6553 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6554 err = nfs4_find_root_sec(server, fhandle, info);
6555 goto out_freepage;
6556 }
6557 if (err)
6558 goto out_freepage;
6559
6560 flavor = nfs_find_best_sec(flavors);
6561 if (err == 0)
6562 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6563
6564out_freepage:
6565 put_page(page);
6566 if (err == -EACCES)
6567 return -EPERM;
6568out:
6569 return err;
6570}
1cab0652
BS		 6571
6572static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6573{
6574 int status;
6575 struct nfs41_test_stateid_args args = {
1cab0652 6576 .stateid = stateid,
7d974794
BS		 6577 };
6578 struct nfs41_test_stateid_res res;
6579 struct rpc_message msg = {
6580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6581 .rpc_argp = &args,
6582 .rpc_resp = &res,
6583 };
1cab0652 6584
9d12b216 6585 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6586 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6587
6588 if (status == NFS_OK)
6589 return res.status;
7d974794
BS		 6590 return status;
6591}
6592
1cab0652 6593static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6594{
6595 struct nfs4_exception exception = { };
6596 int err;
6597 do {
6598 err = nfs4_handle_exception(server,
1cab0652 6599 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6600 &exception);
6601 } while (exception.retry);
6602 return err;
6603}
9aeda35f 6604
1cab0652 6605static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6606{
9aeda35f 6607 struct nfs41_free_stateid_args args = {
1cab0652 6608 .stateid = stateid,
9aeda35f
BS		 6609 };
6610 struct nfs41_free_stateid_res res;
6611 struct rpc_message msg = {
6612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6613 .rpc_argp = &args,
6614 .rpc_resp = &res,
6615 };
6616
9d12b216
TM		 6617 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6618 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6619}
6620
1cab0652 6621static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6622{
6623 struct nfs4_exception exception = { };
6624 int err;
6625 do {
6626 err = nfs4_handle_exception(server,
1cab0652 6627 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6628 &exception);
6629 } while (exception.retry);
6630 return err;
6631}
36281caa
TM		 6632
6633static bool nfs41_match_stateid(const nfs4_stateid *s1,
6634 const nfs4_stateid *s2)
6635{
2d2f24ad 6636 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6637 return false;
6638
2d2f24ad 6639 if (s1->seqid == s2->seqid)
36281caa 6640 return true;
2d2f24ad 6641 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6642 return true;
6643
6644 return false;
6645}
6646
557134a3
AA		 6647#endif /* CONFIG_NFS_V4_1 */
6648
36281caa
TM		 6649static bool nfs4_match_stateid(const nfs4_stateid *s1,
6650 const nfs4_stateid *s2)
6651{
f597c537 6652 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6653}
6654
6655
17280175 6656static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6657 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6658 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6659 .recover_open = nfs4_open_reclaim,
6660 .recover_lock = nfs4_lock_reclaim,
591d71cb 6661 .establish_clid = nfs4_init_clientid,
90a16617 6662 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6663};
6664
591d71cb 6665#if defined(CONFIG_NFS_V4_1)
17280175 6666static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6667 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6668 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6669 .recover_open = nfs4_open_reclaim,
6670 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6671 .establish_clid = nfs41_init_clientid,
b4b82607 6672 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6673 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6674};
6675#endif /* CONFIG_NFS_V4_1 */
6676
17280175 6677static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6678 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6679 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6680 .recover_open = nfs4_open_expired,
6681 .recover_lock = nfs4_lock_expired,
6682 .establish_clid = nfs4_init_clientid,
90a16617 6683 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6684};
6685
6686#if defined(CONFIG_NFS_V4_1)
17280175 6687static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6688 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6689 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6690 .recover_open = nfs41_open_expired,
6691 .recover_lock = nfs41_lock_expired,
4d643d1d 6692 .establish_clid = nfs41_init_clientid,
b4b82607 6693 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6694};
591d71cb 6695#endif /* CONFIG_NFS_V4_1 */
1da177e4 6696
17280175 6697static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6698 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6699 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6700 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6701};
6702
6703#if defined(CONFIG_NFS_V4_1)
17280175 6704static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6705 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6706 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6707 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6708};
6709#endif
6710
97dc1359
TM		 6711static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6712 .minor_version = 0,
6713 .call_sync = _nfs4_call_sync,
36281caa 6714 .match_stateid = nfs4_match_stateid,
fca78d6d 6715 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6716 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6717 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6718 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6719};
6720
6721#if defined(CONFIG_NFS_V4_1)
6722static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6723 .minor_version = 1,
6724 .call_sync = _nfs4_call_sync_session,
36281caa 6725 .match_stateid = nfs41_match_stateid,
fca78d6d 6726 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6727 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6728 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6729 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6730};
6731#endif
6732
97dc1359
TM		 6733const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6734 [0] = &nfs_v4_0_minor_ops,
6735#if defined(CONFIG_NFS_V4_1)
6736 [1] = &nfs_v4_1_minor_ops,
6737#endif
6738};
6739
92e1d5be 6740static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6741 .permission = nfs_permission,
6742 .getattr = nfs_getattr,
6743 .setattr = nfs_setattr,
64c2ce8b
AK		 6744 .getxattr = generic_getxattr,
6745 .setxattr = generic_setxattr,
6746 .listxattr = generic_listxattr,
6747 .removexattr = generic_removexattr,
6b3b5496
BF		 6748};
6749
509de811 6750const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6751 .version = 4, /* protocol version */
6752 .dentry_ops = &nfs4_dentry_operations,
6753 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6754 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6755 .file_ops = &nfs4_file_operations,
1da177e4 6756 .getroot = nfs4_proc_get_root,
281cad46 6757 .submount = nfs4_submount,
1da177e4
LT		 6758 .getattr = nfs4_proc_getattr,
6759 .setattr = nfs4_proc_setattr,
6760 .lookup = nfs4_proc_lookup,
6761 .access = nfs4_proc_access,
6762 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6763 .create = nfs4_proc_create,
6764 .remove = nfs4_proc_remove,
6765 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6766 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6767 .unlink_done = nfs4_proc_unlink_done,
6768 .rename = nfs4_proc_rename,
d3d4152a 6769 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6770 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6771 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6772 .link = nfs4_proc_link,
6773 .symlink = nfs4_proc_symlink,
6774 .mkdir = nfs4_proc_mkdir,
6775 .rmdir = nfs4_proc_remove,
6776 .readdir = nfs4_proc_readdir,
6777 .mknod = nfs4_proc_mknod,
6778 .statfs = nfs4_proc_statfs,
6779 .fsinfo = nfs4_proc_fsinfo,
6780 .pathconf = nfs4_proc_pathconf,
e9326dca 6781 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6782 .decode_dirent = nfs4_decode_dirent,
6783 .read_setup = nfs4_proc_read_setup,
ea7c3303 6784 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6785 .read_done = nfs4_read_done,
1da177e4 6786 .write_setup = nfs4_proc_write_setup,
c6cb80d0 6787 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6788 .write_done = nfs4_write_done,
1da177e4 6789 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6790 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6791 .commit_done = nfs4_commit_done,
1da177e4 6792 .lock = nfs4_proc_lock,
e50a1c2e 6793 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6794 .close_context = nfs4_close_context,
2b484297 6795 .open_context = nfs4_atomic_open,
45a52a02 6796 .init_client = nfs4_init_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)