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NFSv4.1: Simplify slot allocation
[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
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
6168f62c
WAA		 107 case -NFS4ERR_ACCESS:
108 return -EACCES;
52567b03 109 default:
1da177e4 110 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 111 __func__, -err);
52567b03 112 break;
1da177e4 113 }
52567b03 114 return -EIO;
1da177e4
LT		 115}
116
117/*
118 * This is our standard bitmap for GETATTR requests.
119 */
1549210f 120const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 121 FATTR4_WORD0_TYPE
122 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_SIZE
124 | FATTR4_WORD0_FSID
125 | FATTR4_WORD0_FILEID,
126 FATTR4_WORD1_MODE
127 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
135};
136
1549210f
TM		 137static const u32 nfs4_pnfs_open_bitmap[3] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID,
143 FATTR4_WORD1_MODE
144 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
153};
154
e23008ec
AA		 155static const u32 nfs4_open_noattr_bitmap[3] = {
156 FATTR4_WORD0_TYPE
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID,
159};
160
1da177e4
LT		 161const u32 nfs4_statfs_bitmap[2] = {
162 FATTR4_WORD0_FILES_AVAIL
163 | FATTR4_WORD0_FILES_FREE
164 | FATTR4_WORD0_FILES_TOTAL,
165 FATTR4_WORD1_SPACE_AVAIL
166 | FATTR4_WORD1_SPACE_FREE
167 | FATTR4_WORD1_SPACE_TOTAL
168};
169
4ce79717 170const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 171 FATTR4_WORD0_MAXLINK
172 | FATTR4_WORD0_MAXNAME,
173 0
174};
175
dae100c2 176const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 177 | FATTR4_WORD0_MAXREAD
178 | FATTR4_WORD0_MAXWRITE
179 | FATTR4_WORD0_LEASE_TIME,
55b6e774 180 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 181 | FATTR4_WORD1_FS_LAYOUT_TYPES,
182 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 183};
184
830b8e33
MN		 185const u32 nfs4_fs_locations_bitmap[2] = {
186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID
191 | FATTR4_WORD0_FS_LOCATIONS,
192 FATTR4_WORD1_MODE
193 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER
195 | FATTR4_WORD1_OWNER_GROUP
196 | FATTR4_WORD1_RAWDEV
197 | FATTR4_WORD1_SPACE_USED
198 | FATTR4_WORD1_TIME_ACCESS
199 | FATTR4_WORD1_TIME_METADATA
200 | FATTR4_WORD1_TIME_MODIFY
201 | FATTR4_WORD1_MOUNTED_ON_FILEID
202};
203
bc4785cd 204static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 205 struct nfs4_readdir_arg *readdir)
206{
0dbb4c67 207 __be32 *start, *p;
1da177e4 208
1da177e4 209 if (cookie > 2) {
b7ef1956 210 readdir->cookie = cookie;
1da177e4
LT		 211 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
212 return;
213 }
214
215 readdir->cookie = 0;
216 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
217 if (cookie == 2)
218 return;
219
220 /*
221 * NFSv4 servers do not return entries for '.' and '..'
222 * Therefore, we fake these entries here. We let '.'
223 * have cookie 0 and '..' have cookie 1. Note that
224 * when talking to the server, we always send cookie 0
225 * instead of 1 or 2.
226 */
2b86ce2d 227 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 228
229 if (cookie == 0) {
230 *p++ = xdr_one; /* next */
231 *p++ = xdr_zero; /* cookie, first word */
232 *p++ = xdr_one; /* cookie, second word */
233 *p++ = xdr_one; /* entry len */
234 memcpy(p, ".\0\0\0", 4); /* entry */
235 p++;
236 *p++ = xdr_one; /* bitmap length */
237 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
238 *p++ = htonl(8); /* attribute buffer length */
4e769b93 239 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 240 }
241
242 *p++ = xdr_one; /* next */
243 *p++ = xdr_zero; /* cookie, first word */
244 *p++ = xdr_two; /* cookie, second word */
245 *p++ = xdr_two; /* entry len */
246 memcpy(p, "..\0\0", 4); /* entry */
247 p++;
248 *p++ = xdr_one; /* bitmap length */
249 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
250 *p++ = htonl(8); /* attribute buffer length */
4e769b93 251 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 252
253 readdir->pgbase = (char *)p - (char *)start;
254 readdir->count -= readdir->pgbase;
2b86ce2d 255 kunmap_atomic(start);
1da177e4
LT		 256}
257
65de872e
TM		 258static int nfs4_wait_clnt_recover(struct nfs_client *clp)
259{
260 int res;
261
262 might_sleep();
263
e005e804 264 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 265 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 266 if (res)
267 return res;
268
269 if (clp->cl_cons_state < 0)
270 return clp->cl_cons_state;
271 return 0;
65de872e
TM		 272}
273
274static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
275{
276 int res = 0;
277
278 might_sleep();
279
280 if (*timeout <= 0)
281 *timeout = NFS4_POLL_RETRY_MIN;
282 if (*timeout > NFS4_POLL_RETRY_MAX)
283 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 284 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 285 if (fatal_signal_pending(current))
286 res = -ERESTARTSYS;
287 *timeout <<= 1;
288 return res;
289}
290
291/* This is the error handling routine for processes that are allowed
292 * to sleep.
293 */
b064eca2 294static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 295{
296 struct nfs_client *clp = server->nfs_client;
9e33bed5 297 struct nfs4_state *state = exception->state;
3114ea7a 298 struct inode *inode = exception->inode;
65de872e
TM		 299 int ret = errorcode;
300
301 exception->retry = 0;
302 switch(errorcode) {
303 case 0:
304 return 0;
3114ea7a 305 case -NFS4ERR_OPENMODE:
011e2a7f 306 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 307 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 308 exception->retry = 1;
309 return 0;
310 }
311 if (state == NULL)
312 break;
313 nfs4_schedule_stateid_recovery(server, state);
314 goto wait_on_recovery;
a1d0b5ee 315 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 316 case -NFS4ERR_ADMIN_REVOKED:
317 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 318 if (state == NULL)
319 break;
14977489 320 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 321 nfs4_schedule_stateid_recovery(server, state);
322 goto wait_on_recovery;
0ced63d1
TM		 323 case -NFS4ERR_EXPIRED:
324 if (state != NULL)
325 nfs4_schedule_stateid_recovery(server, state);
65de872e 326 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 327 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
03391693 330#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
339 errorcode);
9f594791 340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 341 goto wait_on_recovery;
03391693 342#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 343 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
346 * fail
347 */
348 ret = -EBUSY;
349 break;
350 }
65de872e
TM		 351 case -NFS4ERR_GRACE:
352 case -NFS4ERR_DELAY:
2c643488 353 case -EKEYEXPIRED:
65de872e
TM		 354 ret = nfs4_delay(server->client, &exception->timeout);
355 if (ret != 0)
356 break;
a8a4ae3a 357 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 358 case -NFS4ERR_OLD_STATEID:
359 exception->retry = 1;
b064eca2
TM		 360 break;
361 case -NFS4ERR_BADOWNER:
362 /* The following works around a Linux server bug! */
363 case -NFS4ERR_BADNAME:
364 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
365 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
366 exception->retry = 1;
367 printk(KERN_WARNING "NFS: v4 server %s "
368 "does not accept raw "
369 "uid/gids. "
370 "Reenabling the idmapper.\n",
371 server->nfs_client->cl_hostname);
372 }
65de872e
TM		 373 }
374 /* We failed to handle the error */
375 return nfs4_map_errors(ret);
0400a6b0 376wait_on_recovery:
a2c0b9e2
TM		 377 ret = nfs4_wait_clnt_recover(clp);
378 if (ret == 0)
379 exception->retry = 1;
380 return ret;
65de872e
TM		 381}
382
383
452e9352 384static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 385{
1da177e4
LT		 386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal,timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
390}
391
452e9352
TM		 392static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
393{
394 do_renew_lease(server->nfs_client, timestamp);
395}
396
cccef3b9
AA		 397#if defined(CONFIG_NFS_V4_1)
398
e2c4ab3c
AA		 399/*
400 * nfs4_free_slot - free a slot and efficiently update slot table.
401 *
402 * freeing a slot is trivially done by clearing its respective bit
403 * in the bitmap.
404 * If the freed slotid equals highest_used_slotid we want to update it
405 * so that the server would be able to size down the slot table if needed,
406 * otherwise we know that the highest_used_slotid is still in use.
407 * When updating highest_used_slotid there may be "holes" in the bitmap
408 * so we need to scan down from highest_used_slotid to 0 looking for the now
409 * highest slotid in use.
45d43c29 410 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 411 *
412 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 413 */
414static void
45d43c29 415nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 416{
e2c4ab3c
AA		 417 /* clear used bit in bitmap */
418 __clear_bit(slotid, tbl->used_slots);
419
420 /* update highest_used_slotid when it is freed */
421 if (slotid == tbl->highest_used_slotid) {
422 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 423 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 424 tbl->highest_used_slotid = slotid;
425 else
45d43c29 426 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 427 }
45d43c29
TM		 428 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
429 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 430}
431
961a828d
TM		 432bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
433{
434 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
435 return true;
e2c4ab3c
AA		 436}
437
3bfb0fc5 438/*
42acd021 439 * Signal state manager thread if session fore channel is drained
3bfb0fc5 440 */
42acd021 441static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 442{
a2118c33 443 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 444 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
445 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 446 return;
447 }
448
45d43c29 449 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 450 return;
451
42acd021
AA		 452 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
453 complete(&ses->fc_slot_table.complete);
454}
455
456/*
457 * Signal state manager thread if session back channel is drained
458 */
459void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
460{
461 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 462 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 463 return;
464 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
465 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 466}
467
d185a334 468static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 469{
e3725ec0 470 struct nfs4_session *session;
13615871
AA		 471 struct nfs4_slot_table *tbl;
472
dfb4f309 473 if (!res->sr_slot) {
13615871
AA		 474 /* just wake up the next guy waiting since
475 * we may have not consumed a slot after all */
691daf3b 476 dprintk("%s: No slot\n", __func__);
35dc1d74 477 return;
13615871 478 }
e3725ec0
TM		 479 tbl = res->sr_slot->table;
480 session = tbl->session;
ea028ac9 481
35dc1d74 482 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 483 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
e3725ec0 484 nfs4_check_drain_fc_complete(session);
35dc1d74 485 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 486 res->sr_slot = NULL;
13615871
AA		 487}
488
14516c3a 489static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 490{
e3725ec0 491 struct nfs4_session *session;
933602e3 492 struct nfs4_slot *slot;
b0df806c 493 unsigned long timestamp;
14516c3a 494 struct nfs_client *clp;
b0df806c
AA		 495
496 /*
497 * sr_status remains 1 if an RPC level error occurred. The server
498 * may or may not have processed the sequence operation..
499 * Proceed as if the server received and processed the sequence
500 * operation.
501 */
502 if (res->sr_status == 1)
503 res->sr_status = NFS_OK;
504
468f8613
BS		 505 /* don't increment the sequence number if the task wasn't sent */
506 if (!RPC_WAS_SENT(task))
b0df806c
AA		 507 goto out;
508
933602e3 509 slot = res->sr_slot;
e3725ec0 510 session = slot->table->session;
933602e3 511
691daf3b 512 /* Check the SEQUENCE operation status */
14516c3a
TM		 513 switch (res->sr_status) {
514 case 0:
b0df806c 515 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 516 ++slot->seq_nr;
517 timestamp = slot->renewal_time;
e3725ec0 518 clp = session->clp;
452e9352 519 do_renew_lease(clp, timestamp);
0629e370 520 /* Check sequence flags */
b4410c2f
TM		 521 if (res->sr_status_flags != 0)
522 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 523 break;
524 case -NFS4ERR_DELAY:
525 /* The server detected a resend of the RPC call and
526 * returned NFS4ERR_DELAY as per Section 2.10.6.2
527 * of RFC5661.
528 */
df2fabff 529 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 530 __func__,
df2fabff 531 slot->slot_nr,
933602e3 532 slot->seq_nr);
14516c3a
TM		 533 goto out_retry;
534 default:
535 /* Just update the slot sequence no. */
933602e3 536 ++slot->seq_nr;
b0df806c
AA		 537 }
538out:
539 /* The session may be reset by one of the error handlers. */
540 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 541 nfs41_sequence_free_slot(res);
14516c3a
TM		 542 return 1;
543out_retry:
d05dd4e9 544 if (!rpc_restart_call(task))
14516c3a
TM		 545 goto out;
546 rpc_delay(task, NFS4_POLL_RETRY_MAX);
547 return 0;
b0df806c
AA		 548}
549
14516c3a
TM		 550static int nfs4_sequence_done(struct rpc_task *task,
551 struct nfs4_sequence_res *res)
df896455 552{
e3725ec0 553 if (res->sr_slot == NULL)
14516c3a
TM		 554 return 1;
555 return nfs41_sequence_done(task, res);
df896455
TM		 556}
557
510b8175 558/*
2dc03b7f 559 * nfs4_alloc_slot - efficiently look for a free slot
510b8175 560 *
2dc03b7f 561 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
510b8175
BH		 562 * If found, we mark the slot as used, update the highest_used_slotid,
563 * and respectively set up the sequence operation args.
fbcd4abc
AA		 564 *
565 * Note: must be called with under the slot_tbl_lock.
510b8175 566 */
2dc03b7f 567static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
510b8175 568{
2dc03b7f 569 struct nfs4_slot *ret = NULL;
45d43c29 570 u32 slotid;
510b8175 571
45d43c29 572 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 573 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
574 tbl->max_slots);
575 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
576 if (slotid >= tbl->max_slots)
577 goto out;
578 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 579 if (slotid > tbl->highest_used_slotid ||
580 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175 581 tbl->highest_used_slotid = slotid;
2dc03b7f
TM		 582 ret = &tbl->slots[slotid];
583 ret->renewal_time = jiffies;
584
510b8175
BH		 585out:
586 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
2dc03b7f
TM		 587 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
588 ret ? ret->slot_nr : -1);
589 return ret;
510b8175
BH		 590}
591
9d12b216
TM		 592static void nfs41_init_sequence(struct nfs4_sequence_args *args,
593 struct nfs4_sequence_res *res, int cache_reply)
594{
2b2fa717 595 args->sa_slot = NULL;
9d12b216
TM		 596 args->sa_cache_this = 0;
597 if (cache_reply)
598 args->sa_cache_this = 1;
9d12b216
TM		 599 res->sr_slot = NULL;
600}
601
dc70d7b3 602int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
ce5039c1
AA		 605 struct rpc_task *task)
606{
fbcd4abc
AA		 607 struct nfs4_slot *slot;
608 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 609
610 dprintk("--> %s\n", __func__);
ce5039c1 611 /* slot already allocated? */
dfb4f309 612 if (res->sr_slot != NULL)
ce5039c1
AA		 613 return 0;
614
fbcd4abc
AA		 615 tbl = &session->fc_slot_table;
616
617 spin_lock(&tbl->slot_tbl_lock);
a2118c33 618 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 619 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 620 /* The state manager will wait until the slot table is empty */
05f0d236 621 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 622 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 623 dprintk("%s session is draining\n", __func__);
05f0d236 624 return -EAGAIN;
b069d94a
AA		 625 }
626
689cf5c1
AB		 627 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
628 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
629 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
630 spin_unlock(&tbl->slot_tbl_lock);
631 dprintk("%s enforce FIFO order\n", __func__);
632 return -EAGAIN;
633 }
634
2dc03b7f
TM		 635 slot = nfs4_alloc_slot(tbl);
636 if (slot == NULL) {
fbcd4abc
AA		 637 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
638 spin_unlock(&tbl->slot_tbl_lock);
639 dprintk("<-- %s: no free slots\n", __func__);
640 return -EAGAIN;
641 }
642 spin_unlock(&tbl->slot_tbl_lock);
643
689cf5c1 644 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
2b2fa717
TM		 645
646 args->sa_slot = slot;
fbcd4abc 647
2dc03b7f
TM		 648 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
649 slot->slot_nr, slot->seq_nr);
fbcd4abc 650
dfb4f309 651 res->sr_slot = slot;
2a6e26cd 652 res->sr_status_flags = 0;
fbcd4abc
AA		 653 /*
654 * sr_status is only set in decode_sequence, and so will remain
655 * set to 1 if an rpc level failure occurs.
656 */
657 res->sr_status = 1;
ce5039c1
AA		 658 return 0;
659}
dc70d7b3 660EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 661
035168ab 662int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 663 struct nfs4_sequence_args *args,
664 struct nfs4_sequence_res *res,
ce5039c1
AA		 665 struct rpc_task *task)
666{
035168ab 667 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 668 int ret = 0;
669
9d12b216 670 if (session == NULL)
035168ab 671 goto out;
035168ab 672
df2fabff 673 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 674 __func__, session->clp, session, res->sr_slot ?
df2fabff 675 res->sr_slot->slot_nr : -1);
ce5039c1 676
9d12b216 677 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 678out:
679 dprintk("<-- %s status=%d\n", __func__, ret);
680 return ret;
681}
682
683struct nfs41_call_sync_data {
035168ab 684 const struct nfs_server *seq_server;
ce5039c1
AA		 685 struct nfs4_sequence_args *seq_args;
686 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 687};
688
689static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
690{
691 struct nfs41_call_sync_data *data = calldata;
692
035168ab
TM		 693 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
694
695 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 696 data->seq_res, task))
ce5039c1
AA		 697 return;
698 rpc_call_start(task);
699}
700
b257957e
AB		 701static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
702{
703 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
704 nfs41_call_sync_prepare(task, calldata);
705}
706
69ab40c4
AA		 707static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
708{
709 struct nfs41_call_sync_data *data = calldata;
710
14516c3a 711 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 712}
713
17280175 714static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 715 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 716 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 717};
718
17280175 719static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 720 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
721 .rpc_call_done = nfs41_call_sync_done,
722};
723
7c513058
BS		 724static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
725 struct nfs_server *server,
ce5039c1
AA		 726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
b257957e 729 int privileged)
ce5039c1
AA		 730{
731 int ret;
732 struct rpc_task *task;
733 struct nfs41_call_sync_data data = {
035168ab 734 .seq_server = server,
ce5039c1
AA		 735 .seq_args = args,
736 .seq_res = res,
ce5039c1
AA		 737 };
738 struct rpc_task_setup task_setup = {
7c513058 739 .rpc_client = clnt,
ce5039c1
AA		 740 .rpc_message = msg,
741 .callback_ops = &nfs41_call_sync_ops,
742 .callback_data = &data
743 };
744
b257957e
AB		 745 if (privileged)
746 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 747 task = rpc_run_task(&task_setup);
748 if (IS_ERR(task))
749 ret = PTR_ERR(task);
750 else {
751 ret = task->tk_status;
752 rpc_put_task(task);
753 }
754 return ret;
755}
756
7c513058
BS		 757int _nfs4_call_sync_session(struct rpc_clnt *clnt,
758 struct nfs_server *server,
cccef3b9
AA		 759 struct rpc_message *msg,
760 struct nfs4_sequence_args *args,
761 struct nfs4_sequence_res *res,
762 int cache_reply)
763{
9d12b216
TM		 764 nfs41_init_sequence(args, res, cache_reply);
765 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 766}
767
df896455 768#else
9d12b216
TM		 769static inline
770void nfs41_init_sequence(struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res, int cache_reply)
772{
773}
774
14516c3a
TM		 775static int nfs4_sequence_done(struct rpc_task *task,
776 struct nfs4_sequence_res *res)
df896455 777{
14516c3a 778 return 1;
df896455 779}
cccef3b9
AA		 780#endif /* CONFIG_NFS_V4_1 */
781
7c513058
BS		 782int _nfs4_call_sync(struct rpc_clnt *clnt,
783 struct nfs_server *server,
cccef3b9
AA		 784 struct rpc_message *msg,
785 struct nfs4_sequence_args *args,
786 struct nfs4_sequence_res *res,
787 int cache_reply)
788{
9d12b216 789 nfs41_init_sequence(args, res, cache_reply);
7c513058 790 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 791}
792
e73b83f2 793static inline
7c513058
BS		 794int nfs4_call_sync(struct rpc_clnt *clnt,
795 struct nfs_server *server,
e73b83f2
BS		 796 struct rpc_message *msg,
797 struct nfs4_sequence_args *args,
798 struct nfs4_sequence_res *res,
799 int cache_reply)
800{
7c513058
BS		 801 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
802 args, res, cache_reply);
e73b83f2 803}
cccef3b9 804
38478b24 805static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 806{
38478b24 807 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 808
38478b24 809 spin_lock(&dir->i_lock);
359d7d1c 810 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 811 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 812 nfs_force_lookup_revalidate(dir);
a9a4a87a 813 dir->i_version = cinfo->after;
38478b24 814 spin_unlock(&dir->i_lock);
1da177e4
LT		 815}
816
e56e0b78 817struct nfs4_opendata {
c6d00e63 818 struct kref kref;
e56e0b78
TM		 819 struct nfs_openargs o_arg;
820 struct nfs_openres o_res;
cdd4e68b
TM		 821 struct nfs_open_confirmargs c_arg;
822 struct nfs_open_confirmres c_res;
6926afd1
TM		 823 struct nfs4_string owner_name;
824 struct nfs4_string group_name;
e56e0b78 825 struct nfs_fattr f_attr;
e56e0b78 826 struct dentry *dir;
82a2c1b7 827 struct dentry *dentry;
e56e0b78 828 struct nfs4_state_owner *owner;
aac00a8d 829 struct nfs4_state *state;
e56e0b78 830 struct iattr attrs;
26e976a8 831 unsigned long timestamp;
3e309914 832 unsigned int rpc_done : 1;
24ac23ab
TM		 833 int rpc_status;
834 int cancelled;
e56e0b78
TM		 835};
836
2ced46c2
TM		 837
838static void nfs4_init_opendata_res(struct nfs4_opendata *p)
839{
840 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 841 p->o_res.seqid = p->o_arg.seqid;
842 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 843 p->o_res.server = p->o_arg.server;
5f657530 844 p->o_res.access_request = p->o_arg.access;
2ced46c2 845 nfs_fattr_init(&p->f_attr);
6926afd1 846 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 847}
848
82a2c1b7 849static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 850 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 851 const struct iattr *attrs,
852 gfp_t gfp_mask)
e56e0b78 853{
82a2c1b7 854 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 855 struct inode *dir = parent->d_inode;
856 struct nfs_server *server = NFS_SERVER(dir);
857 struct nfs4_opendata *p;
858
8535b2be 859 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 860 if (p == NULL)
861 goto err;
8535b2be 862 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 863 if (p->o_arg.seqid == NULL)
864 goto err_free;
82a2c1b7
AV		 865 nfs_sb_active(dentry->d_sb);
866 p->dentry = dget(dentry);
e56e0b78
TM		 867 p->dir = parent;
868 p->owner = sp;
869 atomic_inc(&sp->so_count);
870 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 871 p->o_arg.open_flags = flags;
872 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 873 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
874 * will return permission denied for all bits until close */
875 if (!(flags & O_EXCL)) {
876 /* ask server to check for all possible rights as results
877 * are cached */
878 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
879 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 880 }
7539bbab 881 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 882 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
883 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 884 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 885 p->o_arg.server = server;
886 p->o_arg.bitmask = server->attr_bitmask;
1549210f 887 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 888 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 889 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 890 __be32 verf[2];
d77d76ff 891
e56e0b78
TM		 892 p->o_arg.u.attrs = &p->attrs;
893 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 894
895 verf[0] = jiffies;
896 verf[1] = current->pid;
897 memcpy(p->o_arg.u.verifier.data, verf,
898 sizeof(p->o_arg.u.verifier.data));
e56e0b78 899 }
cdd4e68b
TM		 900 p->c_arg.fh = &p->o_res.fh;
901 p->c_arg.stateid = &p->o_res.stateid;
902 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 903 nfs4_init_opendata_res(p);
c6d00e63 904 kref_init(&p->kref);
e56e0b78
TM		 905 return p;
906err_free:
907 kfree(p);
908err:
909 dput(parent);
910 return NULL;
911}
912
c6d00e63 913static void nfs4_opendata_free(struct kref *kref)
e56e0b78 914{
c6d00e63
TM		 915 struct nfs4_opendata *p = container_of(kref,
916 struct nfs4_opendata, kref);
82a2c1b7 917 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 918
919 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 920 if (p->state != NULL)
921 nfs4_put_open_state(p->state);
c6d00e63
TM		 922 nfs4_put_state_owner(p->owner);
923 dput(p->dir);
82a2c1b7
AV		 924 dput(p->dentry);
925 nfs_sb_deactive(sb);
6926afd1 926 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 927 kfree(p);
928}
929
930static void nfs4_opendata_put(struct nfs4_opendata *p)
931{
932 if (p != NULL)
933 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 934}
935
06f814a3
TM		 936static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
937{
06f814a3
TM		 938 int ret;
939
06f814a3 940 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 941 return ret;
942}
943
dc0b027d 944static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 945{
946 int ret = 0;
dc0b027d 947
536e43d1 948 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 949 goto out;
950 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 951 case FMODE_READ:
88069f77
TM		 952 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
953 && state->n_rdonly != 0;
6ee41268
TM		 954 break;
955 case FMODE_WRITE:
88069f77
TM		 956 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
957 && state->n_wronly != 0;
6ee41268
TM		 958 break;
959 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 960 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
961 && state->n_rdwr != 0;
6ee41268 962 }
dc0b027d 963out:
6ee41268
TM		 964 return ret;
965}
966
dc0b027d 967static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 968{
652f89f6
TM		 969 if (delegation == NULL)
970 return 0;
dc0b027d 971 if ((delegation->type & fmode) != fmode)
aac00a8d 972 return 0;
15c831bf 973 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 974 return 0;
b7391f44 975 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 976 return 1;
977}
978
dc0b027d 979static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 980{
dc0b027d 981 switch (fmode) {
e7616923
TM		 982 case FMODE_WRITE:
983 state->n_wronly++;
984 break;
985 case FMODE_READ:
986 state->n_rdonly++;
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 state->n_rdwr++;
990 }
dc0b027d 991 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 992}
993
dc0b027d 994static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 995{
996 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 997 nfs4_stateid_copy(&state->stateid, stateid);
998 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 999 switch (fmode) {
003707c7
TM		 1000 case FMODE_READ:
1001 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1002 break;
1003 case FMODE_WRITE:
1004 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1005 break;
1006 case FMODE_READ|FMODE_WRITE:
1007 set_bit(NFS_O_RDWR_STATE, &state->flags);
1008 }
e7616923
TM		 1009}
1010
dc0b027d 1011static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1012{
8bda4e4c 1013 write_seqlock(&state->seqlock);
dc0b027d 1014 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1015 write_sequnlock(&state->seqlock);
003707c7
TM		 1016}
1017
dc0b027d 1018static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1019{
8bda4e4c
TM		 1020 /*
1021 * Protect the call to nfs4_state_set_mode_locked and
1022 * serialise the stateid update
1023 */
1024 write_seqlock(&state->seqlock);
003707c7 1025 if (deleg_stateid != NULL) {
f597c537 1026 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1027 set_bit(NFS_DELEGATED_STATE, &state->flags);
1028 }
1029 if (open_stateid != NULL)
dc0b027d 1030 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1031 write_sequnlock(&state->seqlock);
1032 spin_lock(&state->owner->so_lock);
dc0b027d 1033 update_open_stateflags(state, fmode);
ec073428 1034 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1035}
1036
dc0b027d 1037static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1038{
1039 struct nfs_inode *nfsi = NFS_I(state->inode);
1040 struct nfs_delegation *deleg_cur;
1041 int ret = 0;
1042
dc0b027d 1043 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1044
1045 rcu_read_lock();
1046 deleg_cur = rcu_dereference(nfsi->delegation);
1047 if (deleg_cur == NULL)
1048 goto no_delegation;
1049
1050 spin_lock(&deleg_cur->lock);
1051 if (nfsi->delegation != deleg_cur ||
dc0b027d 1052 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1053 goto no_delegation_unlock;
1054
1055 if (delegation == NULL)
1056 delegation = &deleg_cur->stateid;
f597c537 1057 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1058 goto no_delegation_unlock;
1059
b7391f44 1060 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1061 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1062 ret = 1;
1063no_delegation_unlock:
1064 spin_unlock(&deleg_cur->lock);
1065no_delegation:
1066 rcu_read_unlock();
1067
1068 if (!ret && open_stateid != NULL) {
dc0b027d 1069 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1070 ret = 1;
1071 }
1072
1073 return ret;
1074}
1075
1076
dc0b027d 1077static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1078{
1079 struct nfs_delegation *delegation;
1080
1081 rcu_read_lock();
1082 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1083 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1084 rcu_read_unlock();
1085 return;
1086 }
1087 rcu_read_unlock();
57ec14c5 1088 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1089}
1090
6ee41268 1091static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1092{
1093 struct nfs4_state *state = opendata->state;
1094 struct nfs_inode *nfsi = NFS_I(state->inode);
1095 struct nfs_delegation *delegation;
536e43d1 1096 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1097 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1098 nfs4_stateid stateid;
1099 int ret = -EAGAIN;
1100
aac00a8d 1101 for (;;) {
dc0b027d 1102 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1103 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1104 if (can_open_cached(state, fmode, open_mode)) {
1105 update_open_stateflags(state, fmode);
6ee41268 1106 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1107 goto out_return_state;
1108 }
1109 spin_unlock(&state->owner->so_lock);
1110 }
34310430
TM		 1111 rcu_read_lock();
1112 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1113 if (!can_open_delegated(delegation, fmode)) {
34310430 1114 rcu_read_unlock();
aac00a8d 1115 break;
34310430 1116 }
aac00a8d 1117 /* Save the delegation */
f597c537 1118 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1119 rcu_read_unlock();
af22f94a 1120 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1121 if (ret != 0)
1122 goto out;
1123 ret = -EAGAIN;
34310430
TM		 1124
1125 /* Try to update the stateid using the delegation */
dc0b027d 1126 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1127 goto out_return_state;
aac00a8d 1128 }
aac00a8d
TM		 1129out:
1130 return ERR_PTR(ret);
1131out_return_state:
1132 atomic_inc(&state->count);
1133 return state;
1134}
1135
e23008ec
AA		 1136static void
1137nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1138{
1139 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1140 struct nfs_delegation *delegation;
1141 int delegation_flags = 0;
1142
1143 rcu_read_lock();
1144 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1145 if (delegation)
1146 delegation_flags = delegation->flags;
1147 rcu_read_unlock();
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",
1152 clp->cl_hostname);
1153 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
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}
1162
1163/*
1164 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1165 * and update the nfs4_state.
1166 */
1167static struct nfs4_state *
1168_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1169{
1170 struct inode *inode = data->state->inode;
1171 struct nfs4_state *state = data->state;
1172 int ret;
1173
1174 if (!data->rpc_done) {
1175 ret = data->rpc_status;
1176 goto err;
1177 }
1178
1179 ret = -ESTALE;
1180 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1181 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1182 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1183 goto err;
1184
1185 ret = -ENOMEM;
1186 state = nfs4_get_open_state(inode, data->owner);
1187 if (state == NULL)
1188 goto err;
1189
1190 ret = nfs_refresh_inode(inode, &data->f_attr);
1191 if (ret)
1192 goto err;
1193
1194 if (data->o_res.delegation_type != 0)
1195 nfs4_opendata_check_deleg(data, state);
1196 update_open_stateid(state, &data->o_res.stateid, NULL,
1197 data->o_arg.fmode);
1198
1199 return state;
1200err:
1201 return ERR_PTR(ret);
1202
1203}
1204
1205static struct nfs4_state *
1206_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1207{
1208 struct inode *inode;
1209 struct nfs4_state *state = NULL;
1b370bc2 1210 int ret;
24ac23ab 1211
aac00a8d 1212 if (!data->rpc_done) {
6ee41268 1213 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1214 goto out;
1215 }
1216
1b370bc2 1217 ret = -EAGAIN;
24ac23ab 1218 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1219 goto err;
24ac23ab 1220 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1221 ret = PTR_ERR(inode);
03f28e3a 1222 if (IS_ERR(inode))
1b370bc2
TM		 1223 goto err;
1224 ret = -ENOMEM;
24ac23ab
TM		 1225 state = nfs4_get_open_state(inode, data->owner);
1226 if (state == NULL)
1b370bc2 1227 goto err_put_inode;
e23008ec
AA		 1228 if (data->o_res.delegation_type != 0)
1229 nfs4_opendata_check_deleg(data, state);
34310430 1230 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1231 data->o_arg.fmode);
24ac23ab 1232 iput(inode);
aac00a8d 1233out:
24ac23ab 1234 return state;
1b370bc2
TM		 1235err_put_inode:
1236 iput(inode);
1237err:
1238 return ERR_PTR(ret);
24ac23ab
TM		 1239}
1240
e23008ec
AA		 1241static struct nfs4_state *
1242nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1243{
1244 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1245 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1246 return _nfs4_opendata_to_nfs4_state(data);
1247}
1248
864472e9
TM		 1249static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1250{
1251 struct nfs_inode *nfsi = NFS_I(state->inode);
1252 struct nfs_open_context *ctx;
1253
1254 spin_lock(&state->inode->i_lock);
1255 list_for_each_entry(ctx, &nfsi->open_files, list) {
1256 if (ctx->state != state)
1257 continue;
1258 get_nfs_open_context(ctx);
1259 spin_unlock(&state->inode->i_lock);
1260 return ctx;
1261 }
1262 spin_unlock(&state->inode->i_lock);
1263 return ERR_PTR(-ENOENT);
1264}
1265
6f220ed5
TM		 1266static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1267{
1268 struct nfs4_opendata *opendata;
1269
3d4ff43d 1270 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1271 if (opendata == NULL)
1272 return ERR_PTR(-ENOMEM);
1273 opendata->state = state;
1274 atomic_inc(&state->count);
1275 return opendata;
1276}
1277
dc0b027d 1278static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1279{
2ced46c2 1280 struct nfs4_state *newstate;
864472e9
TM		 1281 int ret;
1282
dc0b027d
TM		 1283 opendata->o_arg.open_flags = 0;
1284 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1285 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1286 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1287 nfs4_init_opendata_res(opendata);
b257957e 1288 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1289 if (ret != 0)
1290 return ret;
2ced46c2 1291 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1292 if (IS_ERR(newstate))
1293 return PTR_ERR(newstate);
643168c2 1294 nfs4_close_state(newstate, fmode);
2ced46c2 1295 *res = newstate;
864472e9
TM		 1296 return 0;
1297}
1298
1299static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1300{
864472e9 1301 struct nfs4_state *newstate;
864472e9
TM		 1302 int ret;
1303
1304 /* memory barrier prior to reading state->n_* */
2ced46c2 1305 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1306 smp_rmb();
1307 if (state->n_rdwr != 0) {
b0ed9dbc 1308 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1309 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1310 if (ret != 0)
1311 return ret;
2ced46c2
TM		 1312 if (newstate != state)
1313 return -ESTALE;
864472e9
TM		 1314 }
1315 if (state->n_wronly != 0) {
b0ed9dbc 1316 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1317 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1318 if (ret != 0)
1319 return ret;
2ced46c2
TM		 1320 if (newstate != state)
1321 return -ESTALE;
864472e9
TM		 1322 }
1323 if (state->n_rdonly != 0) {
b0ed9dbc 1324 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1325 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1326 if (ret != 0)
1327 return ret;
2ced46c2
TM		 1328 if (newstate != state)
1329 return -ESTALE;
864472e9 1330 }
1ac7e2fd
TM		 1331 /*
1332 * We may have performed cached opens for all three recoveries.
1333 * Check if we need to update the current stateid.
1334 */
1335 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1336 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1337 write_seqlock(&state->seqlock);
1ac7e2fd 1338 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1339 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1340 write_sequnlock(&state->seqlock);
1ac7e2fd 1341 }
864472e9
TM		 1342 return 0;
1343}
1344
1da177e4
LT		 1345/*
1346 * OPEN_RECLAIM:
1347 * reclaim state on the server after a reboot.
1da177e4 1348 */
539cd03a 1349static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1350{
1ac7e2fd 1351 struct nfs_delegation *delegation;
864472e9 1352 struct nfs4_opendata *opendata;
dc0b027d 1353 fmode_t delegation_type = 0;
1da177e4
LT		 1354 int status;
1355
6f220ed5
TM		 1356 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1357 if (IS_ERR(opendata))
1358 return PTR_ERR(opendata);
864472e9
TM		 1359 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1360 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1361 rcu_read_lock();
1362 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1363 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1364 delegation_type = delegation->type;
1ac7e2fd 1365 rcu_read_unlock();
864472e9
TM		 1366 opendata->o_arg.u.delegation_type = delegation_type;
1367 status = nfs4_open_recover(opendata, state);
c6d00e63 1368 nfs4_opendata_put(opendata);
1da177e4
LT		 1369 return status;
1370}
1371
539cd03a 1372static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1373{
1374 struct nfs_server *server = NFS_SERVER(state->inode);
1375 struct nfs4_exception exception = { };
1376 int err;
1377 do {
539cd03a 1378 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1379 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1380 break;
1381 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1382 } while (exception.retry);
1383 return err;
1384}
1385
864472e9
TM		 1386static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1387{
1388 struct nfs_open_context *ctx;
1389 int ret;
1390
1391 ctx = nfs4_state_find_open_context(state);
1392 if (IS_ERR(ctx))
1393 return PTR_ERR(ctx);
539cd03a 1394 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1395 put_nfs_open_context(ctx);
1396 return ret;
1397}
1398
13437e12 1399static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1400{
e56e0b78 1401 struct nfs4_opendata *opendata;
864472e9 1402 int ret;
1da177e4 1403
6f220ed5
TM		 1404 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1405 if (IS_ERR(opendata))
1406 return PTR_ERR(opendata);
e56e0b78 1407 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1408 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1409 ret = nfs4_open_recover(opendata, state);
c6d00e63 1410 nfs4_opendata_put(opendata);
864472e9 1411 return ret;
1da177e4
LT		 1412}
1413
13437e12 1414int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1415{
1416 struct nfs4_exception exception = { };
539cd03a 1417 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1418 int err;
1419 do {
13437e12 1420 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1421 switch (err) {
1422 case 0:
965b5d67
TM		 1423 case -ENOENT:
1424 case -ESTALE:
1425 goto out;
bcfa49f6
RL		 1426 case -NFS4ERR_BADSESSION:
1427 case -NFS4ERR_BADSLOT:
1428 case -NFS4ERR_BAD_HIGH_SLOT:
1429 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1430 case -NFS4ERR_DEADSESSION:
9f594791 1431 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1432 goto out;
1da177e4
LT		 1433 case -NFS4ERR_STALE_CLIENTID:
1434 case -NFS4ERR_STALE_STATEID:
1435 case -NFS4ERR_EXPIRED:
1436 /* Don't recall a delegation if it was lost */
0400a6b0 1437 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1438 goto out;
1439 case -ERESTARTSYS:
1440 /*
1441 * The show must go on: exit, but mark the
1442 * stateid as needing recovery.
1443 */
a1d0b5ee 1444 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1445 case -NFS4ERR_ADMIN_REVOKED:
1446 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1447 nfs_inode_find_state_and_recover(state->inode,
1448 stateid);
0400a6b0 1449 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1450 case -EKEYEXPIRED:
1451 /*
1452 * User RPCSEC_GSS context has expired.
1453 * We cannot recover this stateid now, so
1454 * skip it and allow recovery thread to
1455 * proceed.
1456 */
965b5d67
TM		 1457 case -ENOMEM:
1458 err = 0;
1459 goto out;
1da177e4
LT		 1460 }
1461 err = nfs4_handle_exception(server, err, &exception);
1462 } while (exception.retry);
965b5d67 1463out:
1da177e4
LT		 1464 return err;
1465}
1466
cdd4e68b
TM		 1467static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1468{
1469 struct nfs4_opendata *data = calldata;
1470
1471 data->rpc_status = task->tk_status;
26e976a8 1472 if (data->rpc_status == 0) {
f597c537 1473 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1474 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1475 renew_lease(data->o_res.server, data->timestamp);
3e309914 1476 data->rpc_done = 1;
26e976a8 1477 }
cdd4e68b
TM		 1478}
1479
1480static void nfs4_open_confirm_release(void *calldata)
1481{
1482 struct nfs4_opendata *data = calldata;
1483 struct nfs4_state *state = NULL;
1484
1485 /* If this request hasn't been cancelled, do nothing */
1486 if (data->cancelled == 0)
1487 goto out_free;
1488 /* In case of error, no cleanup! */
3e309914 1489 if (!data->rpc_done)
cdd4e68b 1490 goto out_free;
cdd4e68b 1491 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1492 if (!IS_ERR(state))
643168c2 1493 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1494out_free:
c6d00e63 1495 nfs4_opendata_put(data);
cdd4e68b
TM		 1496}
1497
1498static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1499 .rpc_call_done = nfs4_open_confirm_done,
1500 .rpc_release = nfs4_open_confirm_release,
1501};
1502
1503/*
1504 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1505 */
1506static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1507{
1508 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1509 struct rpc_task *task;
5138fde0
TM		 1510 struct rpc_message msg = {
1511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1512 .rpc_argp = &data->c_arg,
1513 .rpc_resp = &data->c_res,
1514 .rpc_cred = data->owner->so_cred,
1515 };
c970aa85
TM		 1516 struct rpc_task_setup task_setup_data = {
1517 .rpc_client = server->client,
5138fde0 1518 .rpc_message = &msg,
c970aa85
TM		 1519 .callback_ops = &nfs4_open_confirm_ops,
1520 .callback_data = data,
101070ca 1521 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1522 .flags = RPC_TASK_ASYNC,
1523 };
1da177e4
LT		 1524 int status;
1525
c6d00e63 1526 kref_get(&data->kref);
3e309914
TM		 1527 data->rpc_done = 0;
1528 data->rpc_status = 0;
5138fde0 1529 data->timestamp = jiffies;
c970aa85 1530 task = rpc_run_task(&task_setup_data);
7a1218a2 1531 if (IS_ERR(task))
cdd4e68b 1532 return PTR_ERR(task);
cdd4e68b
TM		 1533 status = nfs4_wait_for_completion_rpc_task(task);
1534 if (status != 0) {
1535 data->cancelled = 1;
1536 smp_wmb();
1537 } else
1538 status = data->rpc_status;
e6b3c4db 1539 rpc_put_task(task);
1da177e4
LT		 1540 return status;
1541}
1542
24ac23ab 1543static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1544{
24ac23ab
TM		 1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state_owner *sp = data->owner;
5138fde0 1547
24ac23ab
TM		 1548 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1549 return;
aac00a8d
TM		 1550 /*
1551 * Check if we still need to send an OPEN call, or if we can use
1552 * a delegation instead.
1553 */
1554 if (data->state != NULL) {
1555 struct nfs_delegation *delegation;
1556
dc0b027d 1557 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1558 goto out_no_action;
aac00a8d
TM		 1559 rcu_read_lock();
1560 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1561 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1562 can_open_delegated(delegation, data->o_arg.fmode))
1563 goto unlock_no_action;
aac00a8d
TM		 1564 rcu_read_unlock();
1565 }
95b72eb0 1566 /* Update client id. */
1f0e890d 1567 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1568 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1569 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1570 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1571 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1572 }
26e976a8 1573 data->timestamp = jiffies;
035168ab 1574 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1575 &data->o_arg.seq_args,
2240a9e2
TM		 1576 &data->o_res.seq_res,
1577 task) != 0)
1578 nfs_release_seqid(data->o_arg.seqid);
1579 else
1580 rpc_call_start(task);
6ee41268 1581 return;
652f89f6
TM		 1582unlock_no_action:
1583 rcu_read_unlock();
6ee41268
TM		 1584out_no_action:
1585 task->tk_action = NULL;
1586
24ac23ab 1587}
1da177e4 1588
b257957e
AB		 1589static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1590{
1591 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1592 nfs4_open_prepare(task, calldata);
1593}
1594
24ac23ab
TM		 1595static void nfs4_open_done(struct rpc_task *task, void *calldata)
1596{
1597 struct nfs4_opendata *data = calldata;
1da177e4 1598
24ac23ab 1599 data->rpc_status = task->tk_status;
d898528c 1600
14516c3a
TM		 1601 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1602 return;
d898528c 1603
24ac23ab 1604 if (task->tk_status == 0) {
807d66d8
TM		 1605 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1606 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1607 case S_IFREG:
1608 break;
1609 case S_IFLNK:
24ac23ab 1610 data->rpc_status = -ELOOP;
6f926b5b
TM		 1611 break;
1612 case S_IFDIR:
24ac23ab 1613 data->rpc_status = -EISDIR;
6f926b5b
TM		 1614 break;
1615 default:
24ac23ab 1616 data->rpc_status = -ENOTDIR;
807d66d8 1617 }
6f926b5b 1618 }
26e976a8 1619 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1620 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1621 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1622 }
3e309914 1623 data->rpc_done = 1;
24ac23ab 1624}
6f926b5b 1625
24ac23ab
TM		 1626static void nfs4_open_release(void *calldata)
1627{
1628 struct nfs4_opendata *data = calldata;
1629 struct nfs4_state *state = NULL;
1630
1631 /* If this request hasn't been cancelled, do nothing */
1632 if (data->cancelled == 0)
1633 goto out_free;
1634 /* In case of error, no cleanup! */
3e309914 1635 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1636 goto out_free;
1637 /* In case we need an open_confirm, no cleanup! */
1638 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1639 goto out_free;
24ac23ab 1640 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1641 if (!IS_ERR(state))
643168c2 1642 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1643out_free:
c6d00e63 1644 nfs4_opendata_put(data);
24ac23ab
TM		 1645}
1646
1647static const struct rpc_call_ops nfs4_open_ops = {
1648 .rpc_call_prepare = nfs4_open_prepare,
1649 .rpc_call_done = nfs4_open_done,
1650 .rpc_release = nfs4_open_release,
1651};
1652
b257957e
AB		 1653static const struct rpc_call_ops nfs4_recover_open_ops = {
1654 .rpc_call_prepare = nfs4_recover_open_prepare,
1655 .rpc_call_done = nfs4_open_done,
1656 .rpc_release = nfs4_open_release,
1657};
1658
1659static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1660{
1661 struct inode *dir = data->dir->d_inode;
1662 struct nfs_server *server = NFS_SERVER(dir);
1663 struct nfs_openargs *o_arg = &data->o_arg;
1664 struct nfs_openres *o_res = &data->o_res;
1665 struct rpc_task *task;
5138fde0
TM		 1666 struct rpc_message msg = {
1667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1668 .rpc_argp = o_arg,
1669 .rpc_resp = o_res,
1670 .rpc_cred = data->owner->so_cred,
1671 };
c970aa85
TM		 1672 struct rpc_task_setup task_setup_data = {
1673 .rpc_client = server->client,
5138fde0 1674 .rpc_message = &msg,
c970aa85
TM		 1675 .callback_ops = &nfs4_open_ops,
1676 .callback_data = data,
101070ca 1677 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1678 .flags = RPC_TASK_ASYNC,
1679 };
24ac23ab
TM		 1680 int status;
1681
9d12b216 1682 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1683 kref_get(&data->kref);
3e309914
TM		 1684 data->rpc_done = 0;
1685 data->rpc_status = 0;
2ced46c2 1686 data->cancelled = 0;
b257957e
AB		 1687 if (isrecover)
1688 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1689 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1690 if (IS_ERR(task))
1691 return PTR_ERR(task);
1692 status = nfs4_wait_for_completion_rpc_task(task);
1693 if (status != 0) {
1694 data->cancelled = 1;
1695 smp_wmb();
1696 } else
1697 status = data->rpc_status;
1698 rpc_put_task(task);
1699
1700 return status;
1701}
1702
1703static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1704{
1705 struct inode *dir = data->dir->d_inode;
1706 struct nfs_openres *o_res = &data->o_res;
1707 int status;
1708
1709 status = nfs4_run_open_task(data, 1);
1710 if (status != 0 || !data->rpc_done)
1711 return status;
1712
6926afd1
TM		 1713 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1714
b257957e
AB		 1715 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1716 status = _nfs4_proc_open_confirm(data);
1717 if (status != 0)
1718 return status;
1719 }
1720
1721 return status;
1722}
1723
6168f62c
WAA		 1724static int nfs4_opendata_access(struct rpc_cred *cred,
1725 struct nfs4_opendata *opendata,
1726 struct nfs4_state *state, fmode_t fmode)
1727{
1728 struct nfs_access_entry cache;
1729 u32 mask;
1730
1731 /* access call failed or for some reason the server doesn't
1732 * support any access modes -- defer access call until later */
1733 if (opendata->o_res.access_supported == 0)
1734 return 0;
1735
1736 mask = 0;
bbd3a8ee
WAA		 1737 /* don't check MAY_WRITE - a newly created file may not have
1738 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1739 if (fmode & FMODE_READ)
1740 mask |= MAY_READ;
6168f62c
WAA		 1741 if (fmode & FMODE_EXEC)
1742 mask |= MAY_EXEC;
1743
1744 cache.cred = cred;
1745 cache.jiffies = jiffies;
1746 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1747 nfs_access_add_cache(state->inode, &cache);
1748
bbd3a8ee 1749 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1750 return 0;
1751
1752 /* even though OPEN succeeded, access is denied. Close the file */
1753 nfs4_close_state(state, fmode);
998f40b5 1754 return -EACCES;
6168f62c
WAA		 1755}
1756
b257957e
AB		 1757/*
1758 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1759 */
1760static int _nfs4_proc_open(struct nfs4_opendata *data)
1761{
1762 struct inode *dir = data->dir->d_inode;
1763 struct nfs_server *server = NFS_SERVER(dir);
1764 struct nfs_openargs *o_arg = &data->o_arg;
1765 struct nfs_openres *o_res = &data->o_res;
1766 int status;
1767
1768 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1769 if (!data->rpc_done)
1770 return status;
1771 if (status != 0) {
1772 if (status == -NFS4ERR_BADNAME &&
1773 !(o_arg->open_flags & O_CREAT))
1774 return -ENOENT;
24ac23ab 1775 return status;
08ef7bd3 1776 }
24ac23ab 1777
6926afd1
TM		 1778 nfs_fattr_map_and_free_names(server, &data->f_attr);
1779
90ff0c54 1780 if (o_arg->open_flags & O_CREAT)
56ae19f3 1781 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1782 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1783 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1784 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1785 status = _nfs4_proc_open_confirm(data);
1da177e4 1786 if (status != 0)
24ac23ab 1787 return status;
1da177e4
LT		 1788 }
1789 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1790 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1791 return 0;
1da177e4
LT		 1792}
1793
d83217c1 1794static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1795{
a78cb57a 1796 unsigned int loop;
6b30954e 1797 int ret;
58d9714a 1798
a78cb57a 1799 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1800 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1801 if (ret != 0)
a78cb57a 1802 break;
e598d843
TM		 1803 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1804 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1805 break;
0400a6b0 1806 nfs4_schedule_state_manager(clp);
a78cb57a 1807 ret = -EIO;
6b30954e 1808 }
a78cb57a 1809 return ret;
58d9714a
TM		 1810}
1811
d83217c1
AA		 1812static int nfs4_recover_expired_lease(struct nfs_server *server)
1813{
1814 return nfs4_client_recover_expired_lease(server->nfs_client);
1815}
1816
1da177e4
LT		 1817/*
1818 * OPEN_EXPIRED:
1819 * reclaim state on the server after a network partition.
1820 * Assumes caller holds the appropriate lock
1821 */
539cd03a 1822static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1823{
e56e0b78 1824 struct nfs4_opendata *opendata;
864472e9 1825 int ret;
1da177e4 1826
6f220ed5
TM		 1827 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1828 if (IS_ERR(opendata))
1829 return PTR_ERR(opendata);
864472e9 1830 ret = nfs4_open_recover(opendata, state);
35d05778 1831 if (ret == -ESTALE)
3d4ff43d 1832 d_drop(ctx->dentry);
c6d00e63 1833 nfs4_opendata_put(opendata);
864472e9 1834 return ret;
1da177e4
LT		 1835}
1836
a9ed2e25 1837static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1838{
539cd03a 1839 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1840 struct nfs4_exception exception = { };
1841 int err;
1842
1843 do {
539cd03a 1844 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1845 switch (err) {
1846 default:
1847 goto out;
1848 case -NFS4ERR_GRACE:
1849 case -NFS4ERR_DELAY:
1850 nfs4_handle_exception(server, err, &exception);
1851 err = 0;
1852 }
202b50dc 1853 } while (exception.retry);
a9ed2e25 1854out:
202b50dc
TM		 1855 return err;
1856}
1857
1da177e4
LT		 1858static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1859{
1da177e4 1860 struct nfs_open_context *ctx;
864472e9 1861 int ret;
1da177e4 1862
864472e9
TM		 1863 ctx = nfs4_state_find_open_context(state);
1864 if (IS_ERR(ctx))
1865 return PTR_ERR(ctx);
539cd03a 1866 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1867 put_nfs_open_context(ctx);
1868 return ret;
1da177e4
LT		 1869}
1870
f062eb6c 1871#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1872static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1873{
f062eb6c 1874 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1875 nfs4_stateid *stateid = &state->stateid;
1876 int status;
1877
1878 /* If a state reset has been done, test_stateid is unneeded */
1879 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1880 return;
1881
1882 status = nfs41_test_stateid(server, stateid);
1883 if (status != NFS_OK) {
1884 /* Free the stateid unless the server explicitly
1885 * informs us the stateid is unrecognized. */
1886 if (status != -NFS4ERR_BAD_STATEID)
1887 nfs41_free_stateid(server, stateid);
6938867e 1888 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1889
6938867e
BS		 1890 write_seqlock(&state->seqlock);
1891 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1892 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1893 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1894 }
1895}
1896
1897/**
1898 * nfs41_check_open_stateid - possibly free an open stateid
1899 *
1900 * @state: NFSv4 state for an inode
1901 *
1902 * Returns NFS_OK if recovery for this stateid is now finished.
1903 * Otherwise a negative NFS4ERR value is returned.
1904 */
1905static int nfs41_check_open_stateid(struct nfs4_state *state)
1906{
1907 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1908 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1909 int status;
1910
1911 /* If a state reset has been done, test_stateid is unneeded */
1912 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1913 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1914 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1915 return -NFS4ERR_BAD_STATEID;
1916
1917 status = nfs41_test_stateid(server, stateid);
1918 if (status != NFS_OK) {
1919 /* Free the stateid unless the server explicitly
1920 * informs us the stateid is unrecognized. */
1921 if (status != -NFS4ERR_BAD_STATEID)
1922 nfs41_free_stateid(server, stateid);
1923
1924 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1925 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1926 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1927 }
1928 return status;
1929}
1930
1931static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1932{
eb64cf96 1933 int status;
b01dd1d8 1934
3e60ffdd
CL		 1935 nfs41_clear_delegation_stateid(state);
1936 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1937 if (status != NFS_OK)
1938 status = nfs4_open_expired(sp, state);
1939 return status;
f062eb6c
BS		 1940}
1941#endif
1942
aa53ed54
JL		 1943/*
1944 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1945 * fields corresponding to attributes that were used to store the verifier.
1946 * Make sure we clobber those fields in the later setattr call
1947 */
1948static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1949{
1950 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1951 !(sattr->ia_valid & ATTR_ATIME_SET))
1952 sattr->ia_valid |= ATTR_ATIME;
1953
1954 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1955 !(sattr->ia_valid & ATTR_MTIME_SET))
1956 sattr->ia_valid |= ATTR_MTIME;
1957}
1958
1da177e4 1959/*
24ac23ab 1960 * Returns a referenced nfs4_state
1da177e4 1961 */
82be417a
AA		 1962static int _nfs4_do_open(struct inode *dir,
1963 struct dentry *dentry,
1964 fmode_t fmode,
1965 int flags,
1966 struct iattr *sattr,
1967 struct rpc_cred *cred,
1968 struct nfs4_state **res,
1969 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1970{
1971 struct nfs4_state_owner *sp;
1972 struct nfs4_state *state = NULL;
1973 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1974 struct nfs4_opendata *opendata;
aac00a8d 1975 int status;
1da177e4
LT		 1976
1977 /* Protect against reboot recovery conflicts */
1da177e4 1978 status = -ENOMEM;
d1e284d5
TM		 1979 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1980 if (sp == NULL) {
1da177e4
LT		 1981 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1982 goto out_err;
1983 }
58d9714a
TM		 1984 status = nfs4_recover_expired_lease(server);
1985 if (status != 0)
b4454fe1 1986 goto err_put_state_owner;
82a2c1b7
AV		 1987 if (dentry->d_inode != NULL)
1988 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1989 status = -ENOMEM;
82a2c1b7 1990 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1991 if (opendata == NULL)
95d35cb4 1992 goto err_put_state_owner;
1da177e4 1993
82be417a
AA		 1994 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1995 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1996 if (!opendata->f_attr.mdsthreshold)
1997 goto err_opendata_put;
1549210f 1998 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1999 }
82a2c1b7
AV		 2000 if (dentry->d_inode != NULL)
2001 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2002
24ac23ab 2003 status = _nfs4_proc_open(opendata);
1da177e4 2004 if (status != 0)
c6d00e63 2005 goto err_opendata_put;
1da177e4 2006
24ac23ab 2007 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2008 status = PTR_ERR(state);
2009 if (IS_ERR(state))
c6d00e63 2010 goto err_opendata_put;
0df5dd4a 2011 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 2012 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 2013
6168f62c
WAA		 2014 status = nfs4_opendata_access(cred, opendata, state, fmode);
2015 if (status != 0)
2016 goto err_opendata_put;
2017
0ab64e0e
TM		 2018 if (opendata->o_arg.open_flags & O_EXCL) {
2019 nfs4_exclusive_attrset(opendata, sattr);
2020
2021 nfs_fattr_init(opendata->o_res.f_attr);
2022 status = nfs4_do_setattr(state->inode, cred,
2023 opendata->o_res.f_attr, sattr,
2024 state);
2025 if (status == 0)
2026 nfs_setattr_update_inode(state->inode, sattr);
2027 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2028 }
82be417a
AA		 2029
2030 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2031 *ctx_th = opendata->f_attr.mdsthreshold;
2032 else
2033 kfree(opendata->f_attr.mdsthreshold);
2034 opendata->f_attr.mdsthreshold = NULL;
2035
c6d00e63 2036 nfs4_opendata_put(opendata);
1da177e4 2037 nfs4_put_state_owner(sp);
1da177e4
LT		 2038 *res = state;
2039 return 0;
c6d00e63 2040err_opendata_put:
82be417a 2041 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2042 nfs4_opendata_put(opendata);
e56e0b78
TM		 2043err_put_state_owner:
2044 nfs4_put_state_owner(sp);
1da177e4 2045out_err:
1da177e4
LT		 2046 *res = NULL;
2047 return status;
2048}
2049
2050
82be417a
AA		 2051static struct nfs4_state *nfs4_do_open(struct inode *dir,
2052 struct dentry *dentry,
2053 fmode_t fmode,
2054 int flags,
2055 struct iattr *sattr,
2056 struct rpc_cred *cred,
2057 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2058{
2059 struct nfs4_exception exception = { };
2060 struct nfs4_state *res;
2061 int status;
2062
6168f62c 2063 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2064 do {
82be417a
AA		 2065 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2066 &res, ctx_th);
1da177e4
LT		 2067 if (status == 0)
2068 break;
2069 /* NOTE: BAD_SEQID means the server and client disagree about the
2070 * book-keeping w.r.t. state-changing operations
2071 * (OPEN/CLOSE/LOCK/LOCKU...)
2072 * It is actually a sign of a bug on the client or on the server.
2073 *
2074 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2075 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2076 * have unhashed the old state_owner for us, and that we can
2077 * therefore safely retry using a new one. We should still warn
2078 * the user though...
2079 */
2080 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2081 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2082 " returned a bad sequence-id error!\n",
2083 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2084 exception.retry = 1;
2085 continue;
2086 }
550f5747
TM		 2087 /*
2088 * BAD_STATEID on OPEN means that the server cancelled our
2089 * state before it received the OPEN_CONFIRM.
2090 * Recover by retrying the request as per the discussion
2091 * on Page 181 of RFC3530.
2092 */
2093 if (status == -NFS4ERR_BAD_STATEID) {
2094 exception.retry = 1;
2095 continue;
2096 }
aac00a8d
TM		 2097 if (status == -EAGAIN) {
2098 /* We must have found a delegation */
2099 exception.retry = 1;
2100 continue;
2101 }
1da177e4
LT		 2102 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2103 status, &exception));
2104 } while (exception.retry);
2105 return res;
2106}
2107
659bfcd6
TM		 2108static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2109 struct nfs_fattr *fattr, struct iattr *sattr,
2110 struct nfs4_state *state)
1da177e4 2111{
3e4f6290 2112 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2113 struct nfs_setattrargs arg = {
3e4f6290 2114 .fh = NFS_FH(inode),
1da177e4
LT		 2115 .iap = sattr,
2116 .server = server,
2117 .bitmask = server->attr_bitmask,
2118 };
2119 struct nfs_setattrres res = {
2120 .fattr = fattr,
2121 .server = server,
2122 };
2123 struct rpc_message msg = {
659bfcd6
TM		 2124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2125 .rpc_argp = &arg,
2126 .rpc_resp = &res,
2127 .rpc_cred = cred,
1da177e4 2128 };
26e976a8 2129 unsigned long timestamp = jiffies;
65e4308d 2130 int status;
1da177e4 2131
0e574af1 2132 nfs_fattr_init(fattr);
1da177e4 2133
4fc8796d 2134 if (state != NULL) {
2a369153
TM		 2135 struct nfs_lockowner lockowner = {
2136 .l_owner = current->files,
2137 .l_pid = current->tgid,
2138 };
4fc8796d 2139 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2140 &lockowner);
4fc8796d
TM		 2141 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2142 FMODE_WRITE)) {
3e4f6290 2143 /* Use that stateid */
08e9eac4 2144 } else
f597c537 2145 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2146
7c513058 2147 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2148 if (status == 0 && state != NULL)
2149 renew_lease(server, timestamp);
65e4308d 2150 return status;
1da177e4
LT		 2151}
2152
659bfcd6
TM		 2153static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2154 struct nfs_fattr *fattr, struct iattr *sattr,
2155 struct nfs4_state *state)
1da177e4 2156{
3e4f6290 2157 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2158 struct nfs4_exception exception = {
2159 .state = state,
3114ea7a 2160 .inode = inode,
a1d0b5ee 2161 };
1da177e4
LT		 2162 int err;
2163 do {
451146be
TM		 2164 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2165 switch (err) {
2166 case -NFS4ERR_OPENMODE:
2167 if (state && !(state->state & FMODE_WRITE)) {
2168 err = -EBADF;
2169 if (sattr->ia_valid & ATTR_OPEN)
2170 err = -EACCES;
2171 goto out;
2172 }
2173 }
2174 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2175 } while (exception.retry);
451146be 2176out:
1da177e4
LT		 2177 return err;
2178}
2179
2180struct nfs4_closedata {
2181 struct inode *inode;
2182 struct nfs4_state *state;
2183 struct nfs_closeargs arg;
2184 struct nfs_closeres res;
516a6af6 2185 struct nfs_fattr fattr;
26e976a8 2186 unsigned long timestamp;
f7e8917a
FI		 2187 bool roc;
2188 u32 roc_barrier;
1da177e4
LT		 2189};
2190
963d8fe5 2191static void nfs4_free_closedata(void *data)
9512135d 2192{
963d8fe5
TM		 2193 struct nfs4_closedata *calldata = data;
2194 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2195 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2196
f7e8917a
FI		 2197 if (calldata->roc)
2198 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2199 nfs4_put_open_state(calldata->state);
2200 nfs_free_seqid(calldata->arg.seqid);
9512135d 2201 nfs4_put_state_owner(sp);
324d003b 2202 nfs_sb_deactive_async(sb);
9512135d
TM		 2203 kfree(calldata);
2204}
2205
88069f77
TM		 2206static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2207 fmode_t fmode)
2208{
2209 spin_lock(&state->owner->so_lock);
2210 if (!(fmode & FMODE_READ))
2211 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2212 if (!(fmode & FMODE_WRITE))
2213 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2214 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2215 spin_unlock(&state->owner->so_lock);
2216}
2217
963d8fe5 2218static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2219{
963d8fe5 2220 struct nfs4_closedata *calldata = data;
1da177e4 2221 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2222 struct nfs_server *server = NFS_SERVER(calldata->inode);
2223
a3ca5651 2224 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2225 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2226 return;
1da177e4
LT		 2227 /* hmm. we are done with the inode, and in the process of freeing
2228 * the state_owner. we keep this around to process errors
2229 */
1da177e4
LT		 2230 switch (task->tk_status) {
2231 case 0:
f7e8917a
FI		 2232 if (calldata->roc)
2233 pnfs_roc_set_barrier(state->inode,
2234 calldata->roc_barrier);
45328c35 2235 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2236 renew_lease(server, calldata->timestamp);
88069f77
TM		 2237 nfs4_close_clear_stateid_flags(state,
2238 calldata->arg.fmode);
1da177e4
LT		 2239 break;
2240 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2241 case -NFS4ERR_OLD_STATEID:
2242 case -NFS4ERR_BAD_STATEID:
1da177e4 2243 case -NFS4ERR_EXPIRED:
dc0b027d 2244 if (calldata->arg.fmode == 0)
9e33bed5 2245 break;
1da177e4 2246 default:
72211dbe
TM		 2247 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2248 rpc_restart_call_prepare(task);
1da177e4 2249 }
72211dbe 2250 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2251 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2252 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2253}
2254
4ce70ada 2255static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2256{
4ce70ada 2257 struct nfs4_closedata *calldata = data;
9512135d 2258 struct nfs4_state *state = calldata->state;
7fdab069 2259 struct inode *inode = calldata->inode;
88069f77 2260 int call_close = 0;
9512135d 2261
a3ca5651 2262 dprintk("%s: begin!\n", __func__);
963d8fe5 2263 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2264 return;
003707c7 2265
88069f77
TM		 2266 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2267 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2268 spin_lock(&state->owner->so_lock);
003707c7 2269 /* Calculate the change in open mode */
e7616923 2270 if (state->n_rdwr == 0) {
003707c7 2271 if (state->n_rdonly == 0) {
88069f77
TM		 2272 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2273 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2274 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2275 }
2276 if (state->n_wronly == 0) {
88069f77
TM		 2277 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2278 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2279 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2280 }
e7616923 2281 }
4cecb76f 2282 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2283
2284 if (!call_close) {
963d8fe5
TM		 2285 /* Note: exit _without_ calling nfs4_close_done */
2286 task->tk_action = NULL;
a3ca5651 2287 goto out;
9512135d 2288 }
88069f77 2289
f7e8917a 2290 if (calldata->arg.fmode == 0) {
88069f77 2291 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2292 if (calldata->roc &&
7fdab069 2293 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2294 goto out;
f7e8917a 2295 }
88069f77 2296
516a6af6 2297 nfs_fattr_init(calldata->res.fattr);
26e976a8 2298 calldata->timestamp = jiffies;
7fdab069 2299 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2300 &calldata->arg.seq_args,
2301 &calldata->res.seq_res,
2240a9e2
TM		 2302 task) != 0)
2303 nfs_release_seqid(calldata->arg.seqid);
2304 else
2305 rpc_call_start(task);
a3ca5651
CL		 2306out:
2307 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2308}
2309
963d8fe5 2310static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2311 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2312 .rpc_call_done = nfs4_close_done,
2313 .rpc_release = nfs4_free_closedata,
2314};
2315
1da177e4
LT		 2316/*
2317 * It is possible for data to be read/written from a mem-mapped file
2318 * after the sys_close call (which hits the vfs layer as a flush).
2319 * This means that we can't safely call nfsv4 close on a file until
2320 * the inode is cleared. This in turn means that we are not good
2321 * NFSv4 citizens - we do not indicate to the server to update the file's
2322 * share state even when we are done with one of the three share
2323 * stateid's in the inode.
2324 *
2325 * NOTE: Caller must be holding the sp->so_owner semaphore!
2326 */
1f7977c1 2327int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2328{
4a35bd41 2329 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2330 struct nfs4_closedata *calldata;
b39e625b
TM		 2331 struct nfs4_state_owner *sp = state->owner;
2332 struct rpc_task *task;
5138fde0
TM		 2333 struct rpc_message msg = {
2334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2335 .rpc_cred = state->owner->so_cred,
2336 };
c970aa85
TM		 2337 struct rpc_task_setup task_setup_data = {
2338 .rpc_client = server->client,
5138fde0 2339 .rpc_message = &msg,
c970aa85 2340 .callback_ops = &nfs4_close_ops,
101070ca 2341 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2342 .flags = RPC_TASK_ASYNC,
2343 };
9512135d 2344 int status = -ENOMEM;
1da177e4 2345
8535b2be 2346 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2347 if (calldata == NULL)
9512135d 2348 goto out;
9d12b216 2349 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2350 calldata->inode = state->inode;
1da177e4 2351 calldata->state = state;
4a35bd41 2352 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2353 calldata->arg.stateid = &state->open_stateid;
1da177e4 2354 /* Serialization for the sequence id */
8535b2be 2355 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2356 if (calldata->arg.seqid == NULL)
2357 goto out_free_calldata;
dc0b027d 2358 calldata->arg.fmode = 0;
a65318bf 2359 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2360 calldata->res.fattr = &calldata->fattr;
c1d51931 2361 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2362 calldata->res.server = server;
1f7977c1 2363 calldata->roc = pnfs_roc(state->inode);
643168c2 2364 nfs_sb_active(calldata->inode->i_sb);
9512135d 2365
1174dd1f
TM		 2366 msg.rpc_argp = &calldata->arg;
2367 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2368 task_setup_data.callback_data = calldata;
2369 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2370 if (IS_ERR(task))
2371 return PTR_ERR(task);
a49c3c77
TM		 2372 status = 0;
2373 if (wait)
2374 status = rpc_wait_for_completion_task(task);
b39e625b 2375 rpc_put_task(task);
a49c3c77 2376 return status;
9512135d
TM		 2377out_free_calldata:
2378 kfree(calldata);
2379out:
b39e625b
TM		 2380 nfs4_put_open_state(state);
2381 nfs4_put_state_owner(sp);
9512135d 2382 return status;
1da177e4
LT		 2383}
2384
2b484297 2385static struct inode *
cd9a1c0e 2386nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2387{
1da177e4 2388 struct nfs4_state *state;
1da177e4 2389
565277f6 2390 /* Protect against concurrent sillydeletes */
82be417a
AA		 2391 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2392 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2393 if (IS_ERR(state))
2394 return ERR_CAST(state);
cd9a1c0e 2395 ctx->state = state;
f46e0bd3 2396 return igrab(state->inode);
1da177e4
LT		 2397}
2398
1185a552 2399static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2400{
2401 if (ctx->state == NULL)
2402 return;
2403 if (is_sync)
643168c2 2404 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2405 else
643168c2 2406 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2407}
1da177e4
LT		 2408
2409static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2410{
43652ad5
BH		 2411 struct nfs4_server_caps_arg args = {
2412 .fhandle = fhandle,
2413 };
1da177e4
LT		 2414 struct nfs4_server_caps_res res = {};
2415 struct rpc_message msg = {
2416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2417 .rpc_argp = &args,
1da177e4
LT		 2418 .rpc_resp = &res,
2419 };
2420 int status;
2421
7c513058 2422 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2423 if (status == 0) {
2424 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2425 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2426 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2427 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2428 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2429 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2430 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2431 server->caps |= NFS_CAP_ACLS;
2432 if (res.has_links != 0)
2433 server->caps |= NFS_CAP_HARDLINKS;
2434 if (res.has_symlinks != 0)
2435 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2436 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2437 server->caps |= NFS_CAP_FILEID;
2438 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2439 server->caps |= NFS_CAP_MODE;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2441 server->caps |= NFS_CAP_NLINK;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2443 server->caps |= NFS_CAP_OWNER;
2444 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2445 server->caps |= NFS_CAP_OWNER_GROUP;
2446 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2447 server->caps |= NFS_CAP_ATIME;
2448 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2449 server->caps |= NFS_CAP_CTIME;
2450 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2451 server->caps |= NFS_CAP_MTIME;
2452
a65318bf
TM		 2453 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2454 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2455 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2456 server->acl_bitmask = res.acl_bitmask;
264e6351 2457 server->fh_expire_type = res.fh_expire_type;
1da177e4 2458 }
cccef3b9 2459
1da177e4
LT		 2460 return status;
2461}
2462
55a97593 2463int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2464{
2465 struct nfs4_exception exception = { };
2466 int err;
2467 do {
2468 err = nfs4_handle_exception(server,
2469 _nfs4_server_capabilities(server, fhandle),
2470 &exception);
2471 } while (exception.retry);
2472 return err;
2473}
2474
2475static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2476 struct nfs_fsinfo *info)
2477{
1da177e4
LT		 2478 struct nfs4_lookup_root_arg args = {
2479 .bitmask = nfs4_fattr_bitmap,
2480 };
2481 struct nfs4_lookup_res res = {
2482 .server = server,
0e574af1 2483 .fattr = info->fattr,
1da177e4
LT		 2484 .fh = fhandle,
2485 };
2486 struct rpc_message msg = {
2487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2488 .rpc_argp = &args,
2489 .rpc_resp = &res,
2490 };
008f55d0 2491
0e574af1 2492 nfs_fattr_init(info->fattr);
7c513058 2493 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2494}
2495
2496static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2497 struct nfs_fsinfo *info)
2498{
2499 struct nfs4_exception exception = { };
2500 int err;
2501 do {
fb8a5ba8
BS		 2502 err = _nfs4_lookup_root(server, fhandle, info);
2503 switch (err) {
2504 case 0:
2505 case -NFS4ERR_WRONGSEC:
05e9cfb4 2506 goto out;
fb8a5ba8
BS		 2507 default:
2508 err = nfs4_handle_exception(server, err, &exception);
2509 }
1da177e4 2510 } while (exception.retry);
05e9cfb4 2511out:
1da177e4
LT		 2512 return err;
2513}
2514
8f70e95f
BS		 2515static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2516 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2517{
2518 struct rpc_auth *auth;
2519 int ret;
2520
2521 auth = rpcauth_create(flavor, server->client);
e8d920c5 2522 if (IS_ERR(auth)) {
8f70e95f
BS		 2523 ret = -EIO;
2524 goto out;
2525 }
2526 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2527out:
2528 return ret;
2529}
2530
801a16dc 2531static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2532 struct nfs_fsinfo *info)
1da177e4 2533{
8f70e95f 2534 int i, len, status = 0;
0fabee24 2535 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2536
6a1a1e34 2537 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2538 if (len < 0)
2539 return len;
8f70e95f
BS		 2540
2541 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2542 /* AUTH_UNIX is the default flavor if none was specified,
2543 * thus has already been tried. */
2544 if (flav_array[i] == RPC_AUTH_UNIX)
2545 continue;
2546
8f70e95f 2547 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2548 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2549 continue;
2550 break;
8f70e95f 2551 }
fb8a5ba8
BS		 2552 /*
2553 * -EACCESS could mean that the user doesn't have correct permissions
2554 * to access the mount. It could also mean that we tried to mount
2555 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2556 * existing mount programs don't handle -EACCES very well so it should
2557 * be mapped to -EPERM instead.
2558 */
2559 if (status == -EACCES)
2560 status = -EPERM;
801a16dc
BS		 2561 return status;
2562}
2563
2564/*
2565 * get the file handle for the "/" directory on the server
2566 */
3028eb2b
BS		 2567int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2568 struct nfs_fsinfo *info)
801a16dc 2569{
fca78d6d 2570 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2571 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2572 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2573 /*
2574 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2575 * by nfs4_map_errors() as this function exits.
2576 */
fca78d6d 2577 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2578 if (status == 0)
2579 status = nfs4_server_capabilities(server, fhandle);
2580 if (status == 0)
2581 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2582 return nfs4_map_errors(status);
1da177e4
LT		 2583}
2584
bae36241
BS		 2585static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2586 struct nfs_fsinfo *info)
2587{
2588 int error;
2589 struct nfs_fattr *fattr = info->fattr;
2590
2591 error = nfs4_server_capabilities(server, mntfh);
2592 if (error < 0) {
2593 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2594 return error;
2595 }
2596
2597 error = nfs4_proc_getattr(server, mntfh, fattr);
2598 if (error < 0) {
2599 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2600 return error;
2601 }
2602
2603 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2604 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2605 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2606
2607 return error;
2608}
2609
6b97fd3d
MN		 2610/*
2611 * Get locations and (maybe) other attributes of a referral.
2612 * Note that we'll actually follow the referral later when
2613 * we detect fsid mismatch in inode revalidation
2614 */
f05d147f
BS		 2615static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2616 const struct qstr *name, struct nfs_fattr *fattr,
2617 struct nfs_fh *fhandle)
6b97fd3d
MN		 2618{
2619 int status = -ENOMEM;
2620 struct page *page = NULL;
2621 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2622
2623 page = alloc_page(GFP_KERNEL);
2624 if (page == NULL)
2625 goto out;
2626 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2627 if (locations == NULL)
2628 goto out;
2629
f05d147f 2630 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2631 if (status != 0)
2632 goto out;
2633 /* Make sure server returned a different fsid for the referral */
2634 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2635 dprintk("%s: server did not return a different fsid for"
2636 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2637 status = -EIO;
2638 goto out;
2639 }
533eb461
AA		 2640 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2641 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2642
533eb461 2643 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2644 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2645 memset(fhandle, 0, sizeof(struct nfs_fh));
2646out:
2647 if (page)
2648 __free_page(page);
5d7ca35a 2649 kfree(locations);
6b97fd3d
MN		 2650 return status;
2651}
2652
1da177e4
LT		 2653static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2654{
2655 struct nfs4_getattr_arg args = {
2656 .fh = fhandle,
2657 .bitmask = server->attr_bitmask,
2658 };
2659 struct nfs4_getattr_res res = {
2660 .fattr = fattr,
2661 .server = server,
2662 };
2663 struct rpc_message msg = {
2664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2665 .rpc_argp = &args,
2666 .rpc_resp = &res,
2667 };
2668
0e574af1 2669 nfs_fattr_init(fattr);
7c513058 2670 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2671}
2672
2673static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2674{
2675 struct nfs4_exception exception = { };
2676 int err;
2677 do {
2678 err = nfs4_handle_exception(server,
2679 _nfs4_proc_getattr(server, fhandle, fattr),
2680 &exception);
2681 } while (exception.retry);
2682 return err;
2683}
2684
2685/*
2686 * The file is not closed if it is opened due to the a request to change
2687 * the size of the file. The open call will not be needed once the
2688 * VFS layer lookup-intents are implemented.
2689 *
2690 * Close is called when the inode is destroyed.
2691 * If we haven't opened the file for O_WRONLY, we
2692 * need to in the size_change case to obtain a stateid.
2693 *
2694 * Got race?
2695 * Because OPEN is always done by name in nfsv4, it is
2696 * possible that we opened a different file by the same
2697 * name. We can recognize this race condition, but we
2698 * can't do anything about it besides returning an error.
2699 *
2700 * This will be fixed with VFS changes (lookup-intent).
2701 */
2702static int
2703nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2704 struct iattr *sattr)
2705{
08e9eac4 2706 struct inode *inode = dentry->d_inode;
659bfcd6 2707 struct rpc_cred *cred = NULL;
d530838b 2708 struct nfs4_state *state = NULL;
1da177e4
LT		 2709 int status;
2710
8a1636c4
BH		 2711 if (pnfs_ld_layoutret_on_setattr(inode))
2712 pnfs_return_layout(inode);
2713
0e574af1 2714 nfs_fattr_init(fattr);
1da177e4 2715
2669940d
AA		 2716 /* Deal with open(O_TRUNC) */
2717 if (sattr->ia_valid & ATTR_OPEN)
2718 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2719
2720 /* Optimization: if the end result is no change, don't RPC */
2721 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2722 return 0;
2723
d530838b 2724 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2725 if (sattr->ia_valid & ATTR_FILE) {
2726 struct nfs_open_context *ctx;
2727
2728 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2729 if (ctx) {
2730 cred = ctx->cred;
2731 state = ctx->state;
2732 }
659bfcd6 2733 }
08e9eac4 2734
659bfcd6 2735 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2736 if (status == 0)
2737 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2738 return status;
2739}
2740
0c2e53f1
TM		 2741static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2742 const struct qstr *name, struct nfs_fh *fhandle,
2743 struct nfs_fattr *fattr)
2b3de441 2744{
0c2e53f1 2745 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2746 int status;
2747 struct nfs4_lookup_arg args = {
2748 .bitmask = server->attr_bitmask,
0c2e53f1 2749 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2750 .name = name,
2751 };
2752 struct nfs4_lookup_res res = {
2753 .server = server,
2754 .fattr = fattr,
2755 .fh = fhandle,
2756 };
2757 struct rpc_message msg = {
2758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2759 .rpc_argp = &args,
2760 .rpc_resp = &res,
2761 };
2762
2763 nfs_fattr_init(fattr);
2764
1da177e4 2765 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2766 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2767 dprintk("NFS reply lookup: %d\n", status);
2768 return status;
2769}
2770
72de53ec 2771static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2772{
7ebb9315 2773 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2774 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2775 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2776 fattr->nlink = 2;
2777}
2778
72de53ec
BS		 2779static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2780 struct qstr *name, struct nfs_fh *fhandle,
2781 struct nfs_fattr *fattr)
1da177e4
LT		 2782{
2783 struct nfs4_exception exception = { };
72de53ec 2784 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2785 int err;
2786 do {
72de53ec
BS		 2787 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2788 switch (err) {
08ef7bd3 2789 case -NFS4ERR_BADNAME:
72de53ec
BS		 2790 err = -ENOENT;
2791 goto out;
0c2e53f1 2792 case -NFS4ERR_MOVED:
f05d147f 2793 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2794 goto out;
0c2e53f1 2795 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2796 err = -EPERM;
2797 if (client != *clnt)
2798 goto out;
2799
2800 client = nfs4_create_sec_client(client, dir, name);
2801 if (IS_ERR(client))
2802 return PTR_ERR(client);
2803
2804 exception.retry = 1;
2805 break;
2806 default:
2807 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2808 }
1da177e4 2809 } while (exception.retry);
72de53ec
BS		 2810
2811out:
2812 if (err == 0)
2813 *clnt = client;
2814 else if (client != *clnt)
2815 rpc_shutdown_client(client);
2816
1da177e4
LT		 2817 return err;
2818}
2819
80a16b21 2820static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2821 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2822{
2823 int status;
2824 struct rpc_clnt *client = NFS_CLIENT(dir);
2825
2826 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2827 if (client != NFS_CLIENT(dir)) {
2828 rpc_shutdown_client(client);
2829 nfs_fixup_secinfo_attributes(fattr);
2830 }
2831 return status;
2832}
2833
f05d147f
BS		 2834struct rpc_clnt *
2835nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2836 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2837{
2838 int status;
2839 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2840
2841 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2842 if (status < 0) {
2843 rpc_shutdown_client(client);
2844 return ERR_PTR(status);
2845 }
2846 return client;
2847}
2848
1da177e4
LT		 2849static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2850{
76b32999 2851 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2852 struct nfs4_accessargs args = {
2853 .fh = NFS_FH(inode),
a4980e78 2854 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2855 };
2856 struct nfs4_accessres res = {
2857 .server = server,
1da177e4 2858 };
1da177e4
LT		 2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2861 .rpc_argp = &args,
2862 .rpc_resp = &res,
2863 .rpc_cred = entry->cred,
2864 };
2865 int mode = entry->mask;
2866 int status;
2867
2868 /*
2869 * Determine which access bits we want to ask for...
2870 */
2871 if (mode & MAY_READ)
2872 args.access |= NFS4_ACCESS_READ;
2873 if (S_ISDIR(inode->i_mode)) {
2874 if (mode & MAY_WRITE)
2875 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2876 if (mode & MAY_EXEC)
2877 args.access |= NFS4_ACCESS_LOOKUP;
2878 } else {
2879 if (mode & MAY_WRITE)
2880 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2881 if (mode & MAY_EXEC)
2882 args.access |= NFS4_ACCESS_EXECUTE;
2883 }
c407d41a
TM		 2884
2885 res.fattr = nfs_alloc_fattr();
2886 if (res.fattr == NULL)
2887 return -ENOMEM;
2888
7c513058 2889 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2890 if (!status) {
6168f62c 2891 nfs_access_set_mask(entry, res.access);
c407d41a 2892 nfs_refresh_inode(inode, res.fattr);
1da177e4 2893 }
c407d41a 2894 nfs_free_fattr(res.fattr);
1da177e4
LT		 2895 return status;
2896}
2897
2898static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2899{
2900 struct nfs4_exception exception = { };
2901 int err;
2902 do {
2903 err = nfs4_handle_exception(NFS_SERVER(inode),
2904 _nfs4_proc_access(inode, entry),
2905 &exception);
2906 } while (exception.retry);
2907 return err;
2908}
2909
2910/*
2911 * TODO: For the time being, we don't try to get any attributes
2912 * along with any of the zero-copy operations READ, READDIR,
2913 * READLINK, WRITE.
2914 *
2915 * In the case of the first three, we want to put the GETATTR
2916 * after the read-type operation -- this is because it is hard
2917 * to predict the length of a GETATTR response in v4, and thus
2918 * align the READ data correctly. This means that the GETATTR
2919 * may end up partially falling into the page cache, and we should
2920 * shift it into the 'tail' of the xdr_buf before processing.
2921 * To do this efficiently, we need to know the total length
2922 * of data received, which doesn't seem to be available outside
2923 * of the RPC layer.
2924 *
2925 * In the case of WRITE, we also want to put the GETATTR after
2926 * the operation -- in this case because we want to make sure
140150db 2927 * we get the post-operation mtime and size.
1da177e4
LT		 2928 *
2929 * Both of these changes to the XDR layer would in fact be quite
2930 * minor, but I decided to leave them for a subsequent patch.
2931 */
2932static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2933 unsigned int pgbase, unsigned int pglen)
2934{
2935 struct nfs4_readlink args = {
2936 .fh = NFS_FH(inode),
2937 .pgbase = pgbase,
2938 .pglen = pglen,
2939 .pages = &page,
2940 };
f50c7000 2941 struct nfs4_readlink_res res;
1da177e4
LT		 2942 struct rpc_message msg = {
2943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2944 .rpc_argp = &args,
f50c7000 2945 .rpc_resp = &res,
1da177e4
LT		 2946 };
2947
7c513058 2948 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2949}
2950
2951static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2952 unsigned int pgbase, unsigned int pglen)
2953{
2954 struct nfs4_exception exception = { };
2955 int err;
2956 do {
2957 err = nfs4_handle_exception(NFS_SERVER(inode),
2958 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
1da177e4 2964/*
8867fe58 2965 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2966 */
1da177e4
LT		 2967static int
2968nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2969 int flags)
1da177e4 2970{
8867fe58 2971 struct nfs_open_context *ctx;
1da177e4 2972 struct nfs4_state *state;
1da177e4
LT		 2973 int status = 0;
2974
8867fe58
MS		 2975 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2976 if (IS_ERR(ctx))
2977 return PTR_ERR(ctx);
2978
a8a5da99 2979 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2980 state = nfs4_do_open(dir, dentry, ctx->mode,
2981 flags, sattr, ctx->cred,
2982 &ctx->mdsthreshold);
d4d9cdcb 2983 d_drop(dentry);
1da177e4
LT		 2984 if (IS_ERR(state)) {
2985 status = PTR_ERR(state);
c0204fd2 2986 goto out;
1da177e4 2987 }
d4d9cdcb 2988 d_add(dentry, igrab(state->inode));
d75340cc 2989 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2990 ctx->state = state;
1da177e4 2991out:
8867fe58 2992 put_nfs_open_context(ctx);
1da177e4
LT		 2993 return status;
2994}
2995
2996static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2997{
16e42959 2998 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2999 struct nfs_removeargs args = {
1da177e4 3000 .fh = NFS_FH(dir),
26fe5750 3001 .name = *name,
16e42959 3002 };
4fdc17b2 3003 struct nfs_removeres res = {
16e42959 3004 .server = server,
1da177e4 3005 };
1da177e4 3006 struct rpc_message msg = {
4fdc17b2
TM		 3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3008 .rpc_argp = &args,
3009 .rpc_resp = &res,
1da177e4 3010 };
778d2817 3011 int status;
1da177e4 3012
7c513058 3013 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3014 if (status == 0)
16e42959 3015 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3016 return status;
3017}
3018
3019static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3020{
3021 struct nfs4_exception exception = { };
3022 int err;
3023 do {
3024 err = nfs4_handle_exception(NFS_SERVER(dir),
3025 _nfs4_proc_remove(dir, name),
3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
e4eff1a6 3031static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3032{
e4eff1a6
TM		 3033 struct nfs_server *server = NFS_SERVER(dir);
3034 struct nfs_removeargs *args = msg->rpc_argp;
3035 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3036
e4eff1a6 3037 res->server = server;
1da177e4 3038 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3039 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3040}
3041
34e137cc
BS		 3042static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3043{
3044 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3045 &data->args.seq_args,
3046 &data->res.seq_res,
3047 task))
3048 return;
3049 rpc_call_start(task);
1da177e4
LT		 3050}
3051
e4eff1a6 3052static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3053{
e4eff1a6
TM		 3054 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3055
14516c3a
TM		 3056 if (!nfs4_sequence_done(task, &res->seq_res))
3057 return 0;
9e33bed5 3058 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3059 return 0;
3060 update_changeattr(dir, &res->cinfo);
e4eff1a6 3061 return 1;
1da177e4
LT		 3062}
3063
d3d4152a
JL		 3064static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3065{
3066 struct nfs_server *server = NFS_SERVER(dir);
3067 struct nfs_renameargs *arg = msg->rpc_argp;
3068 struct nfs_renameres *res = msg->rpc_resp;
3069
3070 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3071 res->server = server;
9d12b216 3072 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3073}
3074
c6bfa1a1
BS		 3075static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3076{
3077 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3078 &data->args.seq_args,
3079 &data->res.seq_res,
3080 task))
3081 return;
3082 rpc_call_start(task);
d3d4152a
JL		 3083}
3084
3085static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3086 struct inode *new_dir)
3087{
3088 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3089
3090 if (!nfs4_sequence_done(task, &res->seq_res))
3091 return 0;
3092 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3093 return 0;
3094
3095 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3096 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3097 return 1;
3098}
3099
1da177e4
LT		 3100static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3101 struct inode *new_dir, struct qstr *new_name)
3102{
6caf2c82 3103 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3104 struct nfs_renameargs arg = {
1da177e4
LT		 3105 .old_dir = NFS_FH(old_dir),
3106 .new_dir = NFS_FH(new_dir),
3107 .old_name = old_name,
3108 .new_name = new_name,
6caf2c82 3109 };
e8582a8b 3110 struct nfs_renameres res = {
6caf2c82 3111 .server = server,
1da177e4 3112 };
1da177e4
LT		 3113 struct rpc_message msg = {
3114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3115 .rpc_argp = &arg,
3116 .rpc_resp = &res,
3117 };
011fff72 3118 int status = -ENOMEM;
1da177e4 3119
7c513058 3120 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3121 if (!status) {
3122 update_changeattr(old_dir, &res.old_cinfo);
3123 update_changeattr(new_dir, &res.new_cinfo);
3124 }
3125 return status;
3126}
3127
3128static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3129 struct inode *new_dir, struct qstr *new_name)
3130{
3131 struct nfs4_exception exception = { };
3132 int err;
3133 do {
3134 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3135 _nfs4_proc_rename(old_dir, old_name,
3136 new_dir, new_name),
3137 &exception);
3138 } while (exception.retry);
3139 return err;
3140}
3141
3142static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3143{
91ba2eee 3144 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3145 struct nfs4_link_arg arg = {
3146 .fh = NFS_FH(inode),
3147 .dir_fh = NFS_FH(dir),
3148 .name = name,
91ba2eee
TM		 3149 .bitmask = server->attr_bitmask,
3150 };
91ba2eee
TM		 3151 struct nfs4_link_res res = {
3152 .server = server,
1da177e4 3153 };
1da177e4
LT		 3154 struct rpc_message msg = {
3155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3156 .rpc_argp = &arg,
91ba2eee 3157 .rpc_resp = &res,
1da177e4 3158 };
136f2627
TM		 3159 int status = -ENOMEM;
3160
3161 res.fattr = nfs_alloc_fattr();
778d2817 3162 if (res.fattr == NULL)
136f2627 3163 goto out;
1da177e4 3164
7c513058 3165 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3166 if (!status) {
3167 update_changeattr(dir, &res.cinfo);
73a3d07c 3168 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3169 }
136f2627 3170out:
136f2627 3171 nfs_free_fattr(res.fattr);
1da177e4
LT		 3172 return status;
3173}
3174
3175static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3176{
3177 struct nfs4_exception exception = { };
3178 int err;
3179 do {
3180 err = nfs4_handle_exception(NFS_SERVER(inode),
3181 _nfs4_proc_link(inode, dir, name),
3182 &exception);
3183 } while (exception.retry);
3184 return err;
3185}
3186
57dc9a57
TM		 3187struct nfs4_createdata {
3188 struct rpc_message msg;
3189 struct nfs4_create_arg arg;
3190 struct nfs4_create_res res;
3191 struct nfs_fh fh;
3192 struct nfs_fattr fattr;
57dc9a57
TM		 3193};
3194
3195static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3196 struct qstr *name, struct iattr *sattr, u32 ftype)
3197{
3198 struct nfs4_createdata *data;
3199
3200 data = kzalloc(sizeof(*data), GFP_KERNEL);
3201 if (data != NULL) {
3202 struct nfs_server *server = NFS_SERVER(dir);
3203
3204 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3205 data->msg.rpc_argp = &data->arg;
3206 data->msg.rpc_resp = &data->res;
3207 data->arg.dir_fh = NFS_FH(dir);
3208 data->arg.server = server;
3209 data->arg.name = name;
3210 data->arg.attrs = sattr;
3211 data->arg.ftype = ftype;
3212 data->arg.bitmask = server->attr_bitmask;
3213 data->res.server = server;
3214 data->res.fh = &data->fh;
3215 data->res.fattr = &data->fattr;
57dc9a57 3216 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3217 }
3218 return data;
3219}
3220
3221static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3222{
7c513058 3223 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3224 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3225 if (status == 0) {
3226 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3227 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3228 }
3229 return status;
3230}
3231
3232static void nfs4_free_createdata(struct nfs4_createdata *data)
3233{
3234 kfree(data);
3235}
3236
4f390c15 3237static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3238 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3239{
57dc9a57
TM		 3240 struct nfs4_createdata *data;
3241 int status = -ENAMETOOLONG;
1da177e4 3242
94a6d753 3243 if (len > NFS4_MAXPATHLEN)
57dc9a57 3244 goto out;
4f390c15 3245
57dc9a57
TM		 3246 status = -ENOMEM;
3247 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3248 if (data == NULL)
3249 goto out;
3250
3251 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3252 data->arg.u.symlink.pages = &page;
3253 data->arg.u.symlink.len = len;
1da177e4 3254
57dc9a57
TM		 3255 status = nfs4_do_create(dir, dentry, data);
3256
3257 nfs4_free_createdata(data);
3258out:
1da177e4
LT		 3259 return status;
3260}
3261
4f390c15 3262static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3263 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3264{
3265 struct nfs4_exception exception = { };
3266 int err;
3267 do {
3268 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3269 _nfs4_proc_symlink(dir, dentry, page,
3270 len, sattr),
1da177e4
LT		 3271 &exception);
3272 } while (exception.retry);
3273 return err;
3274}
3275
3276static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3277 struct iattr *sattr)
3278{
57dc9a57
TM		 3279 struct nfs4_createdata *data;
3280 int status = -ENOMEM;
1da177e4 3281
57dc9a57
TM		 3282 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3283 if (data == NULL)
3284 goto out;
3285
3286 status = nfs4_do_create(dir, dentry, data);
3287
3288 nfs4_free_createdata(data);
3289out:
1da177e4
LT		 3290 return status;
3291}
3292
3293static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3294 struct iattr *sattr)
3295{
3296 struct nfs4_exception exception = { };
3297 int err;
a8a5da99
AK		 3298
3299 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3300 do {
3301 err = nfs4_handle_exception(NFS_SERVER(dir),
3302 _nfs4_proc_mkdir(dir, dentry, sattr),
3303 &exception);
3304 } while (exception.retry);
3305 return err;
3306}
3307
3308static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3309 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3310{
3311 struct inode *dir = dentry->d_inode;
3312 struct nfs4_readdir_arg args = {
3313 .fh = NFS_FH(dir),
56e4ebf8 3314 .pages = pages,
1da177e4
LT		 3315 .pgbase = 0,
3316 .count = count,
96d25e53 3317 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3318 .plus = plus,
1da177e4
LT		 3319 };
3320 struct nfs4_readdir_res res;
3321 struct rpc_message msg = {
3322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3323 .rpc_argp = &args,
3324 .rpc_resp = &res,
3325 .rpc_cred = cred,
3326 };
3327 int status;
3328
3110ff80 3329 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3330 dentry->d_parent->d_name.name,
3331 dentry->d_name.name,
3332 (unsigned long long)cookie);
c3f52af3 3333 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3334 res.pgbase = args.pgbase;
7c513058 3335 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3336 if (status >= 0) {
c3f52af3 3337 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3338 status += args.pgbase;
3339 }
c4812998
TM		 3340
3341 nfs_invalidate_atime(dir);
3342
3110ff80 3343 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3344 return status;
3345}
3346
3347static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3348 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3349{
3350 struct nfs4_exception exception = { };
3351 int err;
3352 do {
3353 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3354 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3355 pages, count, plus),
1da177e4
LT		 3356 &exception);
3357 } while (exception.retry);
3358 return err;
3359}
3360
3361static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3362 struct iattr *sattr, dev_t rdev)
3363{
57dc9a57
TM		 3364 struct nfs4_createdata *data;
3365 int mode = sattr->ia_mode;
3366 int status = -ENOMEM;
1da177e4 3367
57dc9a57
TM		 3368 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3369 if (data == NULL)
3370 goto out;
3371
1da177e4 3372 if (S_ISFIFO(mode))
57dc9a57 3373 data->arg.ftype = NF4FIFO;
1da177e4 3374 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3375 data->arg.ftype = NF4BLK;
3376 data->arg.u.device.specdata1 = MAJOR(rdev);
3377 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3378 }
3379 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3380 data->arg.ftype = NF4CHR;
3381 data->arg.u.device.specdata1 = MAJOR(rdev);
3382 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3383 } else if (!S_ISSOCK(mode)) {
3384 status = -EINVAL;
3385 goto out_free;
1da177e4 3386 }
1da177e4 3387
57dc9a57 3388 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3389out_free:
57dc9a57
TM		 3390 nfs4_free_createdata(data);
3391out:
1da177e4
LT		 3392 return status;
3393}
3394
3395static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3396 struct iattr *sattr, dev_t rdev)
3397{
3398 struct nfs4_exception exception = { };
3399 int err;
a8a5da99
AK		 3400
3401 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3402 do {
3403 err = nfs4_handle_exception(NFS_SERVER(dir),
3404 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3405 &exception);
3406 } while (exception.retry);
3407 return err;
3408}
3409
3410static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3411 struct nfs_fsstat *fsstat)
3412{
3413 struct nfs4_statfs_arg args = {
3414 .fh = fhandle,
3415 .bitmask = server->attr_bitmask,
3416 };
24ad148a
BH		 3417 struct nfs4_statfs_res res = {
3418 .fsstat = fsstat,
3419 };
1da177e4
LT		 3420 struct rpc_message msg = {
3421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3422 .rpc_argp = &args,
24ad148a 3423 .rpc_resp = &res,
1da177e4
LT		 3424 };
3425
0e574af1 3426 nfs_fattr_init(fsstat->fattr);
7c513058 3427 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3428}
3429
3430static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3431{
3432 struct nfs4_exception exception = { };
3433 int err;
3434 do {
3435 err = nfs4_handle_exception(server,
3436 _nfs4_proc_statfs(server, fhandle, fsstat),
3437 &exception);
3438 } while (exception.retry);
3439 return err;
3440}
3441
3442static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3443 struct nfs_fsinfo *fsinfo)
3444{
3445 struct nfs4_fsinfo_arg args = {
3446 .fh = fhandle,
3447 .bitmask = server->attr_bitmask,
3448 };
3dda5e43
BH		 3449 struct nfs4_fsinfo_res res = {
3450 .fsinfo = fsinfo,
3451 };
1da177e4
LT		 3452 struct rpc_message msg = {
3453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3454 .rpc_argp = &args,
3dda5e43 3455 .rpc_resp = &res,
1da177e4
LT		 3456 };
3457
7c513058 3458 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3459}
3460
3461static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3462{
3463 struct nfs4_exception exception = { };
3464 int err;
3465
3466 do {
3467 err = nfs4_handle_exception(server,
3468 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3469 &exception);
3470 } while (exception.retry);
3471 return err;
3472}
3473
3474static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3475{
e38eb650
BS		 3476 int error;
3477
0e574af1 3478 nfs_fattr_init(fsinfo->fattr);
e38eb650 3479 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3480 if (error == 0) {
3481 /* block layout checks this! */
3482 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3483 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3484 }
e38eb650
BS		 3485
3486 return error;
1da177e4
LT		 3487}
3488
3489static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3490 struct nfs_pathconf *pathconf)
3491{
3492 struct nfs4_pathconf_arg args = {
3493 .fh = fhandle,
3494 .bitmask = server->attr_bitmask,
3495 };
d45b2989
BH		 3496 struct nfs4_pathconf_res res = {
3497 .pathconf = pathconf,
3498 };
1da177e4
LT		 3499 struct rpc_message msg = {
3500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3501 .rpc_argp = &args,
d45b2989 3502 .rpc_resp = &res,
1da177e4
LT		 3503 };
3504
3505 /* None of the pathconf attributes are mandatory to implement */
3506 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3507 memset(pathconf, 0, sizeof(*pathconf));
3508 return 0;
3509 }
3510
0e574af1 3511 nfs_fattr_init(pathconf->fattr);
7c513058 3512 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3513}
3514
3515static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3516 struct nfs_pathconf *pathconf)
3517{
3518 struct nfs4_exception exception = { };
3519 int err;
3520
3521 do {
3522 err = nfs4_handle_exception(server,
3523 _nfs4_proc_pathconf(server, fhandle, pathconf),
3524 &exception);
3525 } while (exception.retry);
3526 return err;
3527}
3528
d20581aa
BH		 3529void __nfs4_read_done_cb(struct nfs_read_data *data)
3530{
cd841605 3531 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3532}
3533
cbdabc7f 3534static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3535{
cd841605 3536 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3537
9e33bed5 3538 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3539 rpc_restart_call_prepare(task);
ec06c096 3540 return -EAGAIN;
1da177e4 3541 }
8850df99 3542
d20581aa 3543 __nfs4_read_done_cb(data);
1da177e4 3544 if (task->tk_status > 0)
ec06c096
TM		 3545 renew_lease(server, data->timestamp);
3546 return 0;
1da177e4
LT		 3547}
3548
cbdabc7f
AA		 3549static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3550{
3551
3552 dprintk("--> %s\n", __func__);
3553
3554 if (!nfs4_sequence_done(task, &data->res.seq_res))
3555 return -EAGAIN;
3556
d20581aa
BH		 3557 return data->read_done_cb ? data->read_done_cb(task, data) :
3558 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3559}
3560
bdc7f021 3561static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3562{
1da177e4 3563 data->timestamp = jiffies;
cbdabc7f 3564 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3565 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3566 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3567}
3568
ea7c3303
BS		 3569static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3570{
cd841605 3571 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3572 &data->args.seq_args,
3573 &data->res.seq_res,
3574 task))
3575 return;
3576 rpc_call_start(task);
1da177e4
LT		 3577}
3578
b029bc9b 3579static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3580{
cd841605 3581 struct inode *inode = data->header->inode;
1da177e4 3582
9e33bed5 3583 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3584 rpc_restart_call_prepare(task);
788e7a89 3585 return -EAGAIN;
1da177e4 3586 }
4f9838c7 3587 if (task->tk_status >= 0) {
1da177e4 3588 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3589 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3590 }
788e7a89 3591 return 0;
1da177e4
LT		 3592}
3593
b029bc9b
FI		 3594static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3595{
3596 if (!nfs4_sequence_done(task, &data->res.seq_res))
3597 return -EAGAIN;
d20581aa
BH		 3598 return data->write_done_cb ? data->write_done_cb(task, data) :
3599 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3600}
3601
5a37f851
TM		 3602static
3603bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3604{
5a37f851
TM		 3605 const struct nfs_pgio_header *hdr = data->header;
3606
3607 /* Don't request attributes for pNFS or O_DIRECT writes */
3608 if (data->ds_clp != NULL || hdr->dreq != NULL)
3609 return false;
3610 /* Otherwise, request attributes if and only if we don't hold
3611 * a delegation
3612 */
011e2a7f 3613 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3614}
a69aef14 3615
bdc7f021 3616static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3617{
cd841605 3618 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3619
5a37f851 3620 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3621 data->args.bitmask = NULL;
3622 data->res.fattr = NULL;
3623 } else
3624 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3625
b029bc9b
FI		 3626 if (!data->write_done_cb)
3627 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3628 data->res.server = server;
1da177e4
LT		 3629 data->timestamp = jiffies;
3630
bdc7f021 3631 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3632 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3633}
3634
c6cb80d0
BS		 3635static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3636{
cd841605 3637 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3638 &data->args.seq_args,
3639 &data->res.seq_res,
3640 task))
3641 return;
3642 rpc_call_start(task);
1da177e4
LT		 3643}
3644
0b7c0153 3645static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3646{
3647 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3648 &data->args.seq_args,
3649 &data->res.seq_res,
3650 task))
3651 return;
3652 rpc_call_start(task);
1da177e4
LT		 3653}
3654
0b7c0153 3655static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3656{
1da177e4 3657 struct inode *inode = data->inode;
14516c3a 3658
9e33bed5 3659 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3660 rpc_restart_call_prepare(task);
788e7a89 3661 return -EAGAIN;
1da177e4 3662 }
788e7a89 3663 return 0;
1da177e4
LT		 3664}
3665
0b7c0153 3666static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3667{
3668 if (!nfs4_sequence_done(task, &data->res.seq_res))
3669 return -EAGAIN;
0b7c0153 3670 return data->commit_done_cb(task, data);
5f452431
FI		 3671}
3672
0b7c0153 3673static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3674{
788e7a89 3675 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3676
0b7c0153
FI		 3677 if (data->commit_done_cb == NULL)
3678 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3679 data->res.server = server;
bdc7f021 3680 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3681 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3682}
3683
9bc4e3ca
CL		 3684struct nfs4_renewdata {
3685 struct nfs_client *client;
3686 unsigned long timestamp;
3687};
3688
1da177e4
LT		 3689/*
3690 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3691 * standalone procedure for queueing an asynchronous RENEW.
3692 */
9bc4e3ca 3693static void nfs4_renew_release(void *calldata)
dc96aef9 3694{
9bc4e3ca
CL		 3695 struct nfs4_renewdata *data = calldata;
3696 struct nfs_client *clp = data->client;
dc96aef9 3697
0851de06
AB		 3698 if (atomic_read(&clp->cl_count) > 1)
3699 nfs4_schedule_state_renewal(clp);
3700 nfs_put_client(clp);
9bc4e3ca 3701 kfree(data);
dc96aef9
AB		 3702}
3703
9bc4e3ca 3704static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3705{
9bc4e3ca
CL		 3706 struct nfs4_renewdata *data = calldata;
3707 struct nfs_client *clp = data->client;
3708 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3709
3710 if (task->tk_status < 0) {
95baa25c 3711 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3712 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3713 return;
3714 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3715 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3716 return;
3717 }
3718 nfs4_schedule_path_down_recovery(clp);
1da177e4 3719 }
452e9352 3720 do_renew_lease(clp, timestamp);
1da177e4
LT		 3721}
3722
963d8fe5
TM		 3723static const struct rpc_call_ops nfs4_renew_ops = {
3724 .rpc_call_done = nfs4_renew_done,
dc96aef9 3725 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3726};
3727
2f60ea6b 3728static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3729{
3730 struct rpc_message msg = {
3731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3732 .rpc_argp = clp,
b4454fe1 3733 .rpc_cred = cred,
1da177e4 3734 };
9bc4e3ca 3735 struct nfs4_renewdata *data;
1da177e4 3736
2f60ea6b
TM		 3737 if (renew_flags == 0)
3738 return 0;
0851de06
AB		 3739 if (!atomic_inc_not_zero(&clp->cl_count))
3740 return -EIO;
b569ad34 3741 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3742 if (data == NULL)
3743 return -ENOMEM;
3744 data->client = clp;
3745 data->timestamp = jiffies;
1da177e4 3746 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3747 &nfs4_renew_ops, data);
1da177e4
LT		 3748}
3749
8534d4ec 3750static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3751{
3752 struct rpc_message msg = {
3753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3754 .rpc_argp = clp,
b4454fe1 3755 .rpc_cred = cred,
1da177e4
LT		 3756 };
3757 unsigned long now = jiffies;
3758 int status;
3759
3760 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3761 if (status < 0)
3762 return status;
452e9352 3763 do_renew_lease(clp, now);
1da177e4
LT		 3764 return 0;
3765}
3766
aa1870af
BF		 3767static inline int nfs4_server_supports_acls(struct nfs_server *server)
3768{
3769 return (server->caps & NFS_CAP_ACLS)
3770 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3771 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3772}
3773
21f498c2
TM		 3774/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3775 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3776 * the stack.
3777 */
21f498c2 3778#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3779
e9e3d724
NH		 3780static int buf_to_pages_noslab(const void *buf, size_t buflen,
3781 struct page **pages, unsigned int *pgbase)
3782{
3783 struct page *newpage, **spages;
3784 int rc = 0;
3785 size_t len;
3786 spages = pages;
3787
3788 do {
21f498c2 3789 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3790 newpage = alloc_page(GFP_KERNEL);
3791
3792 if (newpage == NULL)
3793 goto unwind;
3794 memcpy(page_address(newpage), buf, len);
3795 buf += len;
3796 buflen -= len;
3797 *pages++ = newpage;
3798 rc++;
3799 } while (buflen != 0);
3800
3801 return rc;
3802
3803unwind:
3804 for(; rc > 0; rc--)
3805 __free_page(spages[rc-1]);
3806 return -ENOMEM;
3807}
3808
e50a1c2e
BF		 3809struct nfs4_cached_acl {
3810 int cached;
3811 size_t len;
3e9d4154 3812 char data[0];
e50a1c2e
BF		 3813};
3814
3815static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3816{
3817 struct nfs_inode *nfsi = NFS_I(inode);
3818
3819 spin_lock(&inode->i_lock);
3820 kfree(nfsi->nfs4_acl);
3821 nfsi->nfs4_acl = acl;
3822 spin_unlock(&inode->i_lock);
3823}
3824
3825static void nfs4_zap_acl_attr(struct inode *inode)
3826{
3827 nfs4_set_cached_acl(inode, NULL);
3828}
3829
3830static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3831{
3832 struct nfs_inode *nfsi = NFS_I(inode);
3833 struct nfs4_cached_acl *acl;
3834 int ret = -ENOENT;
3835
3836 spin_lock(&inode->i_lock);
3837 acl = nfsi->nfs4_acl;
3838 if (acl == NULL)
3839 goto out;
3840 if (buf == NULL) /* user is just asking for length */
3841 goto out_len;
3842 if (acl->cached == 0)
3843 goto out;
3844 ret = -ERANGE; /* see getxattr(2) man page */
3845 if (acl->len > buflen)
3846 goto out;
3847 memcpy(buf, acl->data, acl->len);
3848out_len:
3849 ret = acl->len;
3850out:
3851 spin_unlock(&inode->i_lock);
3852 return ret;
3853}
3854
5794d21e 3855static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3856{
3857 struct nfs4_cached_acl *acl;
b291f1b1 3858 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3859
1f1ea6c2 3860 if (buflen <= PAGE_SIZE) {
b291f1b1 3861 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3862 if (acl == NULL)
3863 goto out;
3864 acl->cached = 1;
5794d21e 3865 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3866 } else {
3867 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3868 if (acl == NULL)
3869 goto out;
3870 acl->cached = 0;
3871 }
3872 acl->len = acl_len;
3873out:
3874 nfs4_set_cached_acl(inode, acl);
3875}
3876
bf118a34
AA		 3877/*
3878 * The getxattr API returns the required buffer length when called with a
3879 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3880 * the required buf. On a NULL buf, we send a page of data to the server
3881 * guessing that the ACL request can be serviced by a page. If so, we cache
3882 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3883 * the cache. If not so, we throw away the page, and cache the required
3884 * length. The next getxattr call will then produce another round trip to
3885 * the server, this time with the input buf of the required size.
3886 */
16b4289c 3887static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3888{
bf118a34 3889 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3890 struct nfs_getaclargs args = {
3891 .fh = NFS_FH(inode),
3892 .acl_pages = pages,
3893 .acl_len = buflen,
3894 };
663c79b3
BH		 3895 struct nfs_getaclres res = {
3896 .acl_len = buflen,
3897 };
aa1870af
BF		 3898 struct rpc_message msg = {
3899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3900 .rpc_argp = &args,
663c79b3 3901 .rpc_resp = &res,
aa1870af 3902 };
21f498c2
TM		 3903 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3904 int ret = -ENOMEM, i;
aa1870af 3905
bf118a34
AA		 3906 /* As long as we're doing a round trip to the server anyway,
3907 * let's be prepared for a page of acl data. */
3908 if (npages == 0)
3909 npages = 1;
21f498c2
TM		 3910 if (npages > ARRAY_SIZE(pages))
3911 return -ERANGE;
5a006899 3912
bf118a34
AA		 3913 for (i = 0; i < npages; i++) {
3914 pages[i] = alloc_page(GFP_KERNEL);
3915 if (!pages[i])
3916 goto out_free;
e50a1c2e 3917 }
5a006899
SP		 3918
3919 /* for decoding across pages */
3920 res.acl_scratch = alloc_page(GFP_KERNEL);
3921 if (!res.acl_scratch)
3922 goto out_free;
3923
bf118a34
AA		 3924 args.acl_len = npages * PAGE_SIZE;
3925 args.acl_pgbase = 0;
5a006899 3926
de040bec 3927 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3928 __func__, buf, buflen, npages, args.acl_len);
3929 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3930 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3931 if (ret)
3932 goto out_free;
bf118a34 3933
1f1ea6c2
TM		 3934 /* Handle the case where the passed-in buffer is too short */
3935 if (res.acl_flags & NFS4_ACL_TRUNC) {
3936 /* Did the user only issue a request for the acl length? */
3937 if (buf == NULL)
3938 goto out_ok;
e50a1c2e 3939 ret = -ERANGE;
1f1ea6c2 3940 goto out_free;
e50a1c2e 3941 }
1f1ea6c2
TM		 3942 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3943 if (buf)
3944 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3945out_ok:
3946 ret = res.acl_len;
e50a1c2e 3947out_free:
bf118a34
AA		 3948 for (i = 0; i < npages; i++)
3949 if (pages[i])
3950 __free_page(pages[i]);
331818f1
TM		 3951 if (res.acl_scratch)
3952 __free_page(res.acl_scratch);
aa1870af
BF		 3953 return ret;
3954}
3955
16b4289c
TM		 3956static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3957{
3958 struct nfs4_exception exception = { };
3959 ssize_t ret;
3960 do {
3961 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3962 if (ret >= 0)
3963 break;
3964 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3965 } while (exception.retry);
3966 return ret;
3967}
3968
e50a1c2e
BF		 3969static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3970{
3971 struct nfs_server *server = NFS_SERVER(inode);
3972 int ret;
3973
3974 if (!nfs4_server_supports_acls(server))
3975 return -EOPNOTSUPP;
3976 ret = nfs_revalidate_inode(server, inode);
3977 if (ret < 0)
3978 return ret;
08a22b39
AK		 3979 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3980 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3981 ret = nfs4_read_cached_acl(inode, buf, buflen);
3982 if (ret != -ENOENT)
bf118a34
AA		 3983 /* -ENOENT is returned if there is no ACL or if there is an ACL
3984 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3985 return ret;
3986 return nfs4_get_acl_uncached(inode, buf, buflen);
3987}
3988
16b4289c 3989static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3990{
3991 struct nfs_server *server = NFS_SERVER(inode);
3992 struct page *pages[NFS4ACL_MAXPAGES];
3993 struct nfs_setaclargs arg = {
3994 .fh = NFS_FH(inode),
3995 .acl_pages = pages,
3996 .acl_len = buflen,
3997 };
73c403a9 3998 struct nfs_setaclres res;
4b580ee3
BF		 3999 struct rpc_message msg = {
4000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4001 .rpc_argp = &arg,
73c403a9 4002 .rpc_resp = &res,
4b580ee3 4003 };
21f498c2 4004 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4005 int ret, i;
4b580ee3
BF		 4006
4007 if (!nfs4_server_supports_acls(server))
4008 return -EOPNOTSUPP;
21f498c2
TM		 4009 if (npages > ARRAY_SIZE(pages))
4010 return -ERANGE;
e9e3d724
NH		 4011 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4012 if (i < 0)
4013 return i;
57ec14c5 4014 nfs4_inode_return_delegation(inode);
7c513058 4015 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4016
4017 /*
4018 * Free each page after tx, so the only ref left is
4019 * held by the network stack
4020 */
4021 for (; i > 0; i--)
4022 put_page(pages[i-1]);
4023
08a22b39
AK		 4024 /*
4025 * Acl update can result in inode attribute update.
4026 * so mark the attribute cache invalid.
4027 */
4028 spin_lock(&inode->i_lock);
4029 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4030 spin_unlock(&inode->i_lock);
f41f7418
TM		 4031 nfs_access_zap_cache(inode);
4032 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4033 return ret;
4034}
4035
16b4289c
TM		 4036static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4037{
4038 struct nfs4_exception exception = { };
4039 int err;
4040 do {
4041 err = nfs4_handle_exception(NFS_SERVER(inode),
4042 __nfs4_proc_set_acl(inode, buf, buflen),
4043 &exception);
4044 } while (exception.retry);
4045 return err;
4046}
4047
1da177e4 4048static int
aa5190d0 4049nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4050{
aa5190d0
TM		 4051 struct nfs_client *clp = server->nfs_client;
4052
4053 if (task->tk_status >= 0)
1da177e4
LT		 4054 return 0;
4055 switch(task->tk_status) {
a1d0b5ee 4056 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4057 case -NFS4ERR_ADMIN_REVOKED:
4058 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4059 if (state == NULL)
4060 break;
4061 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4062 case -NFS4ERR_OPENMODE:
4063 if (state == NULL)
4064 break;
0400a6b0
TM		 4065 nfs4_schedule_stateid_recovery(server, state);
4066 goto wait_on_recovery;
0ced63d1
TM		 4067 case -NFS4ERR_EXPIRED:
4068 if (state != NULL)
4069 nfs4_schedule_stateid_recovery(server, state);
1da177e4 4070 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4071 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4072 nfs4_schedule_lease_recovery(clp);
4073 goto wait_on_recovery;
4745e315
AA		 4074#if defined(CONFIG_NFS_V4_1)
4075 case -NFS4ERR_BADSESSION:
4076 case -NFS4ERR_BADSLOT:
4077 case -NFS4ERR_BAD_HIGH_SLOT:
4078 case -NFS4ERR_DEADSESSION:
4079 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4080 case -NFS4ERR_SEQ_FALSE_RETRY:
4081 case -NFS4ERR_SEQ_MISORDERED:
4082 dprintk("%s ERROR %d, Reset session\n", __func__,
4083 task->tk_status);
9f594791 4084 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4085 task->tk_status = 0;
4086 return -EAGAIN;
4087#endif /* CONFIG_NFS_V4_1 */
1da177e4 4088 case -NFS4ERR_DELAY:
aa5190d0 4089 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4090 case -NFS4ERR_GRACE:
2c643488 4091 case -EKEYEXPIRED:
1da177e4
LT		 4092 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4093 task->tk_status = 0;
4094 return -EAGAIN;
a8a4ae3a 4095 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4096 case -NFS4ERR_OLD_STATEID:
4097 task->tk_status = 0;
4098 return -EAGAIN;
4099 }
4100 task->tk_status = nfs4_map_errors(task->tk_status);
4101 return 0;
0400a6b0 4102wait_on_recovery:
a2c0b9e2 4103 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4104 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4105 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4106 task->tk_status = 0;
4107 return -EAGAIN;
1da177e4
LT		 4108}
4109
f092075d
CL		 4110static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4111 nfs4_verifier *bootverf)
cd93710e
CL		 4112{
4113 __be32 verf[2];
4114
2c820d9a
CL		 4115 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4116 /* An impossible timestamp guarantees this value
4117 * will never match a generated boot time. */
4118 verf[0] = 0;
4119 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4120 } else {
f092075d
CL		 4121 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4122 verf[0] = (__be32)nn->boot_time.tv_sec;
4123 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4124 }
cd93710e
CL		 4125 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4126}
4127
e984a55a
CL		 4128static unsigned int
4129nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4130 char *buf, size_t len)
4131{
4132 unsigned int result;
4133
4134 rcu_read_lock();
4135 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4136 clp->cl_ipaddr,
4137 rpc_peeraddr2str(clp->cl_rpcclient,
4138 RPC_DISPLAY_ADDR),
4139 rpc_peeraddr2str(clp->cl_rpcclient,
4140 RPC_DISPLAY_PROTO));
4141 rcu_read_unlock();
4142 return result;
4143}
4144
4145static unsigned int
4146nfs4_init_uniform_client_string(const struct nfs_client *clp,
4147 char *buf, size_t len)
4148{
6f2ea7f2
CL		 4149 char *nodename = clp->cl_rpcclient->cl_nodename;
4150
4151 if (nfs4_client_id_uniquifier[0] != '\0')
4152 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4153 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4154 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4155 nodename);
e984a55a
CL		 4156}
4157
6bbb4ae8
CL		 4158/**
4159 * nfs4_proc_setclientid - Negotiate client ID
4160 * @clp: state data structure
4161 * @program: RPC program for NFSv4 callback service
4162 * @port: IP port number for NFS4 callback service
4163 * @cred: RPC credential to use for this call
4164 * @res: where to place the result
4165 *
4166 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4167 */
bb8b27e5
TM		 4168int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4169 unsigned short port, struct rpc_cred *cred,
4170 struct nfs4_setclientid_res *res)
1da177e4
LT		 4171{
4172 nfs4_verifier sc_verifier;
4173 struct nfs4_setclientid setclientid = {
4174 .sc_verifier = &sc_verifier,
4175 .sc_prog = program,
f4eecd5d 4176 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4177 };
4178 struct rpc_message msg = {
4179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4180 .rpc_argp = &setclientid,
bb8b27e5 4181 .rpc_resp = res,
286d7d6a 4182 .rpc_cred = cred,
1da177e4 4183 };
6bbb4ae8 4184 int status;
1da177e4 4185
de734831 4186 /* nfs_client_id4 */
f092075d 4187 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4188 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4189 setclientid.sc_name_len =
4190 nfs4_init_uniform_client_string(clp,
4191 setclientid.sc_name,
4192 sizeof(setclientid.sc_name));
4193 else
4194 setclientid.sc_name_len =
4195 nfs4_init_nonuniform_client_string(clp,
4196 setclientid.sc_name,
4197 sizeof(setclientid.sc_name));
de734831 4198 /* cb_client4 */
e984a55a 4199 rcu_read_lock();
de734831 4200 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4201 sizeof(setclientid.sc_netid),
4202 rpc_peeraddr2str(clp->cl_rpcclient,
4203 RPC_DISPLAY_NETID));
de734831
CL		 4204 rcu_read_unlock();
4205 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4206 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4207 clp->cl_ipaddr, port >> 8, port & 255);
4208
6bbb4ae8
CL		 4209 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4210 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4211 setclientid.sc_name_len, setclientid.sc_name);
4212 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4213 dprintk("NFS reply setclientid: %d\n", status);
4214 return status;
1da177e4
LT		 4215}
4216
6bbb4ae8
CL		 4217/**
4218 * nfs4_proc_setclientid_confirm - Confirm client ID
4219 * @clp: state data structure
4220 * @res: result of a previous SETCLIENTID
4221 * @cred: RPC credential to use for this call
4222 *
4223 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4224 */
fd954ae1 4225int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4226 struct nfs4_setclientid_res *arg,
4227 struct rpc_cred *cred)
1da177e4
LT		 4228{
4229 struct nfs_fsinfo fsinfo;
4230 struct rpc_message msg = {
4231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4232 .rpc_argp = arg,
1da177e4 4233 .rpc_resp = &fsinfo,
286d7d6a 4234 .rpc_cred = cred,
1da177e4
LT		 4235 };
4236 unsigned long now;
4237 int status;
4238
6bbb4ae8
CL		 4239 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4240 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4241 clp->cl_clientid);
1da177e4 4242 now = jiffies;
1bd714f2 4243 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4244 if (status == 0) {
4245 spin_lock(&clp->cl_lock);
4246 clp->cl_lease_time = fsinfo.lease_time * HZ;
4247 clp->cl_last_renewal = now;
4248 spin_unlock(&clp->cl_lock);
4249 }
6bbb4ae8 4250 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4251 return status;
4252}
4253
fe650407
TM		 4254struct nfs4_delegreturndata {
4255 struct nfs4_delegreturnargs args;
fa178f29 4256 struct nfs4_delegreturnres res;
fe650407
TM		 4257 struct nfs_fh fh;
4258 nfs4_stateid stateid;
26e976a8 4259 unsigned long timestamp;
fa178f29 4260 struct nfs_fattr fattr;
fe650407
TM		 4261 int rpc_status;
4262};
4263
fe650407
TM		 4264static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4265{
4266 struct nfs4_delegreturndata *data = calldata;
938e1010 4267
14516c3a
TM		 4268 if (!nfs4_sequence_done(task, &data->res.seq_res))
4269 return;
938e1010 4270
79708861
RL		 4271 switch (task->tk_status) {
4272 case -NFS4ERR_STALE_STATEID:
4273 case -NFS4ERR_EXPIRED:
4274 case 0:
fa178f29 4275 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4276 break;
4277 default:
4278 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4279 -EAGAIN) {
d00c5d43 4280 rpc_restart_call_prepare(task);
79708861
RL		 4281 return;
4282 }
4283 }
4284 data->rpc_status = task->tk_status;
fe650407
TM		 4285}
4286
4287static void nfs4_delegreturn_release(void *calldata)
4288{
fe650407
TM		 4289 kfree(calldata);
4290}
4291
938e1010
AA		 4292#if defined(CONFIG_NFS_V4_1)
4293static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4294{
4295 struct nfs4_delegreturndata *d_data;
4296
4297 d_data = (struct nfs4_delegreturndata *)data;
4298
035168ab 4299 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4300 &d_data->args.seq_args,
9d12b216 4301 &d_data->res.seq_res, task))
938e1010
AA		 4302 return;
4303 rpc_call_start(task);
4304}
4305#endif /* CONFIG_NFS_V4_1 */
4306
c8d149f3 4307static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4308#if defined(CONFIG_NFS_V4_1)
4309 .rpc_call_prepare = nfs4_delegreturn_prepare,
4310#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4311 .rpc_call_done = nfs4_delegreturn_done,
4312 .rpc_release = nfs4_delegreturn_release,
4313};
4314
e6f81075 4315static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4316{
4317 struct nfs4_delegreturndata *data;
fa178f29 4318 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4319 struct rpc_task *task;
5138fde0
TM		 4320 struct rpc_message msg = {
4321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4322 .rpc_cred = cred,
4323 };
c970aa85
TM		 4324 struct rpc_task_setup task_setup_data = {
4325 .rpc_client = server->client,
5138fde0 4326 .rpc_message = &msg,
c970aa85
TM		 4327 .callback_ops = &nfs4_delegreturn_ops,
4328 .flags = RPC_TASK_ASYNC,
4329 };
e6f81075 4330 int status = 0;
fe650407 4331
8535b2be 4332 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4333 if (data == NULL)
4334 return -ENOMEM;
9d12b216 4335 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4336 data->args.fhandle = &data->fh;
4337 data->args.stateid = &data->stateid;
9e907fec 4338 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4339 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4340 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4341 data->res.fattr = &data->fattr;
4342 data->res.server = server;
5138fde0 4343 nfs_fattr_init(data->res.fattr);
26e976a8 4344 data->timestamp = jiffies;
fe650407
TM		 4345 data->rpc_status = 0;
4346
c970aa85 4347 task_setup_data.callback_data = data;
1174dd1f
TM		 4348 msg.rpc_argp = &data->args;
4349 msg.rpc_resp = &data->res;
c970aa85 4350 task = rpc_run_task(&task_setup_data);
7a1218a2 4351 if (IS_ERR(task))
fe650407 4352 return PTR_ERR(task);
e6f81075
TM		 4353 if (!issync)
4354 goto out;
fe650407 4355 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4356 if (status != 0)
4357 goto out;
4358 status = data->rpc_status;
e144cbcc
TM		 4359 if (status == 0)
4360 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4361 else
4362 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4363out:
e6b3c4db 4364 rpc_put_task(task);
fe650407 4365 return status;
1da177e4
LT		 4366}
4367
e6f81075 4368int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4369{
4370 struct nfs_server *server = NFS_SERVER(inode);
4371 struct nfs4_exception exception = { };
4372 int err;
4373 do {
e6f81075 4374 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4375 switch (err) {
4376 case -NFS4ERR_STALE_STATEID:
4377 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4378 case 0:
4379 return 0;
4380 }
4381 err = nfs4_handle_exception(server, err, &exception);
4382 } while (exception.retry);
4383 return err;
4384}
4385
4386#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4387#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4388
4389/*
4390 * sleep, with exponential backoff, and retry the LOCK operation.
4391 */
4392static unsigned long
4393nfs4_set_lock_task_retry(unsigned long timeout)
4394{
d310310c 4395 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4396 timeout <<= 1;
4397 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4398 return NFS4_LOCK_MAXTIMEOUT;
4399 return timeout;
4400}
4401
1da177e4
LT		 4402static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4403{
4404 struct inode *inode = state->inode;
4405 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4406 struct nfs_client *clp = server->nfs_client;
911d1aaf 4407 struct nfs_lockt_args arg = {
1da177e4 4408 .fh = NFS_FH(inode),
911d1aaf 4409 .fl = request,
1da177e4 4410 };
911d1aaf
TM		 4411 struct nfs_lockt_res res = {
4412 .denied = request,
1da177e4
LT		 4413 };
4414 struct rpc_message msg = {
4415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4416 .rpc_argp = &arg,
4417 .rpc_resp = &res,
4418 .rpc_cred = state->owner->so_cred,
4419 };
1da177e4
LT		 4420 struct nfs4_lock_state *lsp;
4421 int status;
4422
911d1aaf 4423 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4424 status = nfs4_set_lock_state(state, request);
4425 if (status != 0)
4426 goto out;
4427 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4428 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4429 arg.lock_owner.s_dev = server->s_dev;
7c513058 4430 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4431 switch (status) {
4432 case 0:
4433 request->fl_type = F_UNLCK;
4434 break;
4435 case -NFS4ERR_DENIED:
4436 status = 0;
1da177e4 4437 }
70cc6487 4438 request->fl_ops->fl_release_private(request);
8d0a8a9d 4439out:
1da177e4
LT		 4440 return status;
4441}
4442
4443static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4444{
4445 struct nfs4_exception exception = { };
4446 int err;
4447
4448 do {
4449 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4450 _nfs4_proc_getlk(state, cmd, request),
4451 &exception);
4452 } while (exception.retry);
4453 return err;
4454}
4455
4456static int do_vfs_lock(struct file *file, struct file_lock *fl)
4457{
4458 int res = 0;
4459 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4460 case FL_POSIX:
4461 res = posix_lock_file_wait(file, fl);
4462 break;
4463 case FL_FLOCK:
4464 res = flock_lock_file_wait(file, fl);
4465 break;
4466 default:
4467 BUG();
4468 }
1da177e4
LT		 4469 return res;
4470}
4471
faf5f49c 4472struct nfs4_unlockdata {
911d1aaf
TM		 4473 struct nfs_locku_args arg;
4474 struct nfs_locku_res res;
faf5f49c
TM		 4475 struct nfs4_lock_state *lsp;
4476 struct nfs_open_context *ctx;
911d1aaf
TM		 4477 struct file_lock fl;
4478 const struct nfs_server *server;
26e976a8 4479 unsigned long timestamp;
faf5f49c
TM		 4480};
4481
911d1aaf
TM		 4482static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4483 struct nfs_open_context *ctx,
4484 struct nfs4_lock_state *lsp,
4485 struct nfs_seqid *seqid)
4486{
4487 struct nfs4_unlockdata *p;
4488 struct inode *inode = lsp->ls_state->inode;
4489
8535b2be 4490 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4491 if (p == NULL)
4492 return NULL;
4493 p->arg.fh = NFS_FH(inode);
4494 p->arg.fl = &p->fl;
4495 p->arg.seqid = seqid;
c1d51931 4496 p->res.seqid = seqid;
911d1aaf
TM		 4497 p->arg.stateid = &lsp->ls_stateid;
4498 p->lsp = lsp;
4499 atomic_inc(&lsp->ls_count);
4500 /* Ensure we don't close file until we're done freeing locks! */
4501 p->ctx = get_nfs_open_context(ctx);
4502 memcpy(&p->fl, fl, sizeof(p->fl));
4503 p->server = NFS_SERVER(inode);
4504 return p;
4505}
4506
06f814a3 4507static void nfs4_locku_release_calldata(void *data)
faf5f49c 4508{
963d8fe5 4509 struct nfs4_unlockdata *calldata = data;
911d1aaf 4510 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4511 nfs4_put_lock_state(calldata->lsp);
4512 put_nfs_open_context(calldata->ctx);
4513 kfree(calldata);
faf5f49c
TM		 4514}
4515
963d8fe5 4516static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4517{
963d8fe5 4518 struct nfs4_unlockdata *calldata = data;
faf5f49c 4519
14516c3a
TM		 4520 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4521 return;
faf5f49c
TM		 4522 switch (task->tk_status) {
4523 case 0:
f597c537
TM		 4524 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4525 &calldata->res.stateid);
26e976a8 4526 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4527 break;
9e33bed5
TM		 4528 case -NFS4ERR_BAD_STATEID:
4529 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4530 case -NFS4ERR_STALE_STATEID:
4531 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4532 break;
4533 default:
9e33bed5 4534 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4535 rpc_restart_call_prepare(task);
faf5f49c 4536 }
2b1bc308 4537 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4538}
4539
4ce70ada 4540static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4541{
4ce70ada 4542 struct nfs4_unlockdata *calldata = data;
faf5f49c 4543
911d1aaf 4544 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4545 return;
795a88c9 4546 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4547 /* Note: exit _without_ running nfs4_locku_done */
4548 task->tk_action = NULL;
faf5f49c
TM		 4549 return;
4550 }
26e976a8 4551 calldata->timestamp = jiffies;
035168ab 4552 if (nfs4_setup_sequence(calldata->server,
a893693c 4553 &calldata->arg.seq_args,
2240a9e2
TM		 4554 &calldata->res.seq_res,
4555 task) != 0)
4556 nfs_release_seqid(calldata->arg.seqid);
4557 else
4558 rpc_call_start(task);
faf5f49c
TM		 4559}
4560
963d8fe5 4561static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4562 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4563 .rpc_call_done = nfs4_locku_done,
06f814a3 4564 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4565};
4566
a5d16a4d
TM		 4567static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4568 struct nfs_open_context *ctx,
4569 struct nfs4_lock_state *lsp,
4570 struct nfs_seqid *seqid)
4571{
4572 struct nfs4_unlockdata *data;
5138fde0
TM		 4573 struct rpc_message msg = {
4574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4575 .rpc_cred = ctx->cred,
4576 };
c970aa85
TM		 4577 struct rpc_task_setup task_setup_data = {
4578 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4579 .rpc_message = &msg,
c970aa85 4580 .callback_ops = &nfs4_locku_ops,
101070ca 4581 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4582 .flags = RPC_TASK_ASYNC,
4583 };
a5d16a4d 4584
137d6aca
FF		 4585 /* Ensure this is an unlock - when canceling a lock, the
4586 * canceled lock is passed in, and it won't be an unlock.
4587 */
4588 fl->fl_type = F_UNLCK;
4589
a5d16a4d
TM		 4590 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4591 if (data == NULL) {
4592 nfs_free_seqid(seqid);
4593 return ERR_PTR(-ENOMEM);
4594 }
4595
9d12b216 4596 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4597 msg.rpc_argp = &data->arg;
4598 msg.rpc_resp = &data->res;
c970aa85
TM		 4599 task_setup_data.callback_data = data;
4600 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4601}
4602
faf5f49c
TM		 4603static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4604{
19e03c57 4605 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4606 struct nfs_seqid *seqid;
1da177e4 4607 struct nfs4_lock_state *lsp;
06f814a3
TM		 4608 struct rpc_task *task;
4609 int status = 0;
536ff0f8 4610 unsigned char fl_flags = request->fl_flags;
faf5f49c 4611
8d0a8a9d 4612 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4613 /* Unlock _before_ we do the RPC call */
4614 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4615 down_read(&nfsi->rwsem);
4616 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4617 up_read(&nfsi->rwsem);
9b073574 4618 goto out;
19e03c57
TM		 4619 }
4620 up_read(&nfsi->rwsem);
8d0a8a9d 4621 if (status != 0)
9b073574
TM		 4622 goto out;
4623 /* Is this a delegated lock? */
4624 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4625 goto out;
8d0a8a9d 4626 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4627 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4628 status = -ENOMEM;
911d1aaf 4629 if (seqid == NULL)
9b073574 4630 goto out;
cd3758e3 4631 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4632 status = PTR_ERR(task);
4633 if (IS_ERR(task))
9b073574 4634 goto out;
a5d16a4d 4635 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4636 rpc_put_task(task);
9b073574 4637out:
536ff0f8 4638 request->fl_flags = fl_flags;
1da177e4
LT		 4639 return status;
4640}
4641
a5d16a4d
TM		 4642struct nfs4_lockdata {
4643 struct nfs_lock_args arg;
4644 struct nfs_lock_res res;
4645 struct nfs4_lock_state *lsp;
4646 struct nfs_open_context *ctx;
4647 struct file_lock fl;
26e976a8 4648 unsigned long timestamp;
a5d16a4d
TM		 4649 int rpc_status;
4650 int cancelled;
66179efe 4651 struct nfs_server *server;
a5d16a4d
TM		 4652};
4653
4654static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4655 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4656 gfp_t gfp_mask)
1da177e4 4657{
a5d16a4d
TM		 4658 struct nfs4_lockdata *p;
4659 struct inode *inode = lsp->ls_state->inode;
1da177e4 4660 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4661
8535b2be 4662 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4663 if (p == NULL)
4664 return NULL;
4665
4666 p->arg.fh = NFS_FH(inode);
4667 p->arg.fl = &p->fl;
8535b2be 4668 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4669 if (p->arg.open_seqid == NULL)
4670 goto out_free;
8535b2be 4671 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4672 if (p->arg.lock_seqid == NULL)
2f74c0a0 4673 goto out_free_seqid;
a5d16a4d 4674 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4675 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4676 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4677 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4678 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4679 p->lsp = lsp;
66179efe 4680 p->server = server;
a5d16a4d
TM		 4681 atomic_inc(&lsp->ls_count);
4682 p->ctx = get_nfs_open_context(ctx);
4683 memcpy(&p->fl, fl, sizeof(p->fl));
4684 return p;
2f74c0a0
TM		 4685out_free_seqid:
4686 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4687out_free:
4688 kfree(p);
4689 return NULL;
4690}
4691
4692static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4693{
4694 struct nfs4_lockdata *data = calldata;
4695 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4696
3110ff80 4697 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4698 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4699 return;
a5d16a4d
TM		 4700 /* Do we need to do an open_to_lock_owner? */
4701 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970 4702 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
2240a9e2 4703 goto out_release_lock_seqid;
a5d16a4d
TM		 4704 data->arg.open_stateid = &state->stateid;
4705 data->arg.new_lock_owner = 1;
c1d51931 4706 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4707 } else
4708 data->arg.new_lock_owner = 0;
26e976a8 4709 data->timestamp = jiffies;
035168ab
TM		 4710 if (nfs4_setup_sequence(data->server,
4711 &data->arg.seq_args,
2240a9e2
TM		 4712 &data->res.seq_res,
4713 task) == 0) {
4714 rpc_call_start(task);
66179efe 4715 return;
2240a9e2
TM		 4716 }
4717 nfs_release_seqid(data->arg.open_seqid);
4718out_release_lock_seqid:
4719 nfs_release_seqid(data->arg.lock_seqid);
4720 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
a5d16a4d
TM		 4721}
4722
b257957e
AB		 4723static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4724{
4725 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4726 nfs4_lock_prepare(task, calldata);
4727}
4728
a5d16a4d
TM		 4729static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4730{
4731 struct nfs4_lockdata *data = calldata;
4732
3110ff80 4733 dprintk("%s: begin!\n", __func__);
a5d16a4d 4734
14516c3a
TM		 4735 if (!nfs4_sequence_done(task, &data->res.seq_res))
4736 return;
66179efe 4737
a5d16a4d 4738 data->rpc_status = task->tk_status;
a5d16a4d 4739 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4740 if (data->rpc_status == 0)
4741 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4742 else
4743 goto out;
4744 }
4745 if (data->rpc_status == 0) {
f597c537 4746 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4747 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4748 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4749 }
a5d16a4d 4750out:
3110ff80 4751 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4752}
4753
4754static void nfs4_lock_release(void *calldata)
4755{
4756 struct nfs4_lockdata *data = calldata;
4757
3110ff80 4758 dprintk("%s: begin!\n", __func__);
2f74c0a0 4759 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4760 if (data->cancelled != 0) {
4761 struct rpc_task *task;
4762 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4763 data->arg.lock_seqid);
4764 if (!IS_ERR(task))
bf294b41 4765 rpc_put_task_async(task);
3110ff80 4766 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4767 } else
4768 nfs_free_seqid(data->arg.lock_seqid);
4769 nfs4_put_lock_state(data->lsp);
4770 put_nfs_open_context(data->ctx);
4771 kfree(data);
3110ff80 4772 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4773}
4774
4775static const struct rpc_call_ops nfs4_lock_ops = {
4776 .rpc_call_prepare = nfs4_lock_prepare,
4777 .rpc_call_done = nfs4_lock_done,
4778 .rpc_release = nfs4_lock_release,
4779};
4780
b257957e
AB		 4781static const struct rpc_call_ops nfs4_recover_lock_ops = {
4782 .rpc_call_prepare = nfs4_recover_lock_prepare,
4783 .rpc_call_done = nfs4_lock_done,
4784 .rpc_release = nfs4_lock_release,
4785};
4786
2bee72a6
TM		 4787static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4788{
2bee72a6
TM		 4789 switch (error) {
4790 case -NFS4ERR_ADMIN_REVOKED:
4791 case -NFS4ERR_BAD_STATEID:
ecac799a 4792 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4793 if (new_lock_owner != 0 ||
795a88c9 4794 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4795 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4796 break;
4797 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4798 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4799 case -NFS4ERR_EXPIRED:
4800 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4801 };
4802}
4803
afe6c27c 4804static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4805{
4806 struct nfs4_lockdata *data;
4807 struct rpc_task *task;
5138fde0
TM		 4808 struct rpc_message msg = {
4809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4810 .rpc_cred = state->owner->so_cred,
4811 };
c970aa85
TM		 4812 struct rpc_task_setup task_setup_data = {
4813 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4814 .rpc_message = &msg,
c970aa85 4815 .callback_ops = &nfs4_lock_ops,
101070ca 4816 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4817 .flags = RPC_TASK_ASYNC,
4818 };
a5d16a4d
TM		 4819 int ret;
4820
3110ff80 4821 dprintk("%s: begin!\n", __func__);
cd3758e3 4822 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4823 fl->fl_u.nfs4_fl.owner,
4824 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4825 if (data == NULL)
4826 return -ENOMEM;
4827 if (IS_SETLKW(cmd))
4828 data->arg.block = 1;
b257957e
AB		 4829 if (recovery_type > NFS_LOCK_NEW) {
4830 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4831 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4832 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4833 }
9d12b216 4834 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4835 msg.rpc_argp = &data->arg;
4836 msg.rpc_resp = &data->res;
c970aa85
TM		 4837 task_setup_data.callback_data = data;
4838 task = rpc_run_task(&task_setup_data);
7a1218a2 4839 if (IS_ERR(task))
a5d16a4d 4840 return PTR_ERR(task);
a5d16a4d
TM		 4841 ret = nfs4_wait_for_completion_rpc_task(task);
4842 if (ret == 0) {
4843 ret = data->rpc_status;
2bee72a6
TM		 4844 if (ret)
4845 nfs4_handle_setlk_error(data->server, data->lsp,
4846 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4847 } else
4848 data->cancelled = 1;
e6b3c4db 4849 rpc_put_task(task);
3110ff80 4850 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4851 return ret;
1da177e4
LT		 4852}
4853
4854static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4855{
202b50dc 4856 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4857 struct nfs4_exception exception = {
4858 .inode = state->inode,
4859 };
202b50dc
TM		 4860 int err;
4861
4862 do {
42a2d13e
TM		 4863 /* Cache the lock if possible... */
4864 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4865 return 0;
afe6c27c 4866 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4867 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4868 break;
4869 nfs4_handle_exception(server, err, &exception);
4870 } while (exception.retry);
4871 return err;
1da177e4
LT		 4872}
4873
4874static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4875{
202b50dc 4876 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4877 struct nfs4_exception exception = {
4878 .inode = state->inode,
4879 };
202b50dc
TM		 4880 int err;
4881
6bfc93ef
TM		 4882 err = nfs4_set_lock_state(state, request);
4883 if (err != 0)
4884 return err;
202b50dc 4885 do {
42a2d13e
TM		 4886 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4887 return 0;
afe6c27c 4888 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4889 switch (err) {
4890 default:
4891 goto out;
4892 case -NFS4ERR_GRACE:
4893 case -NFS4ERR_DELAY:
4894 nfs4_handle_exception(server, err, &exception);
4895 err = 0;
4896 }
202b50dc 4897 } while (exception.retry);
a9ed2e25 4898out:
202b50dc 4899 return err;
1da177e4
LT		 4900}
4901
f062eb6c 4902#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4903/**
4904 * nfs41_check_expired_locks - possibly free a lock stateid
4905 *
4906 * @state: NFSv4 state for an inode
4907 *
4908 * Returns NFS_OK if recovery for this stateid is now finished.
4909 * Otherwise a negative NFS4ERR value is returned.
4910 */
b01dd1d8 4911static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4912{
eb64cf96 4913 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4914 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4915 struct nfs_server *server = NFS_SERVER(state->inode);
4916
b01dd1d8 4917 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4918 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4919 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4920 if (status != NFS_OK) {
3e60ffdd
CL		 4921 /* Free the stateid unless the server
4922 * informs us the stateid is unrecognized. */
89af2739
CL		 4923 if (status != -NFS4ERR_BAD_STATEID)
4924 nfs41_free_stateid(server,
4925 &lsp->ls_stateid);
795a88c9 4926 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4927 ret = status;
4928 }
4929 }
4930 };
4931
4932 return ret;
4933}
4934
4935static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4936{
4937 int status = NFS_OK;
4938
4939 if (test_bit(LK_STATE_IN_USE, &state->flags))
4940 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4941 if (status != NFS_OK)
4942 status = nfs4_lock_expired(state, request);
4943 return status;
f062eb6c
BS		 4944}
4945#endif
4946
1da177e4
LT		 4947static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4948{
19e03c57 4949 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4950 unsigned char fl_flags = request->fl_flags;
8e469ebd 4951 int status = -ENOLCK;
1da177e4 4952
8e469ebd
TM		 4953 if ((fl_flags & FL_POSIX) &&
4954 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4955 goto out;
6bfc93ef 4956 /* Is this a delegated open? */
6bfc93ef
TM		 4957 status = nfs4_set_lock_state(state, request);
4958 if (status != 0)
4959 goto out;
01c3b861
TM		 4960 request->fl_flags |= FL_ACCESS;
4961 status = do_vfs_lock(request->fl_file, request);
4962 if (status < 0)
4963 goto out;
19e03c57 4964 down_read(&nfsi->rwsem);
01c3b861 4965 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4966 /* Yes: cache locks! */
01c3b861 4967 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4968 request->fl_flags = fl_flags & ~FL_SLEEP;
4969 status = do_vfs_lock(request->fl_file, request);
4970 goto out_unlock;
01c3b861 4971 }
afe6c27c 4972 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4973 if (status != 0)
01c3b861 4974 goto out_unlock;
6bfc93ef 4975 /* Note: we always want to sleep here! */
01c3b861 4976 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4977 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4978 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4979 "manager!\n", __func__);
01c3b861 4980out_unlock:
19e03c57 4981 up_read(&nfsi->rwsem);
01c3b861
TM		 4982out:
4983 request->fl_flags = fl_flags;
1da177e4
LT		 4984 return status;
4985}
4986
4987static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4988{
a1d0b5ee
TM		 4989 struct nfs4_exception exception = {
4990 .state = state,
05ffe24f 4991 .inode = state->inode,
a1d0b5ee 4992 };
1da177e4
LT		 4993 int err;
4994
4995 do {
965b5d67
TM		 4996 err = _nfs4_proc_setlk(state, cmd, request);
4997 if (err == -NFS4ERR_DENIED)
4998 err = -EAGAIN;
1da177e4 4999 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5000 err, &exception);
1da177e4
LT		 5001 } while (exception.retry);
5002 return err;
5003}
5004
5005static int
5006nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5007{
5008 struct nfs_open_context *ctx;
5009 struct nfs4_state *state;
5010 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5011 int status;
5012
5013 /* verify open state */
cd3758e3 5014 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5015 state = ctx->state;
5016
5017 if (request->fl_start < 0 || request->fl_end < 0)
5018 return -EINVAL;
5019
d953126a
TM		 5020 if (IS_GETLK(cmd)) {
5021 if (state != NULL)
5022 return nfs4_proc_getlk(state, F_GETLK, request);
5023 return 0;
5024 }
1da177e4
LT		 5025
5026 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5027 return -EINVAL;
5028
d953126a
TM		 5029 if (request->fl_type == F_UNLCK) {
5030 if (state != NULL)
5031 return nfs4_proc_unlck(state, cmd, request);
5032 return 0;
5033 }
1da177e4 5034
d953126a
TM		 5035 if (state == NULL)
5036 return -ENOLCK;
55725513
TM		 5037 /*
5038 * Don't rely on the VFS having checked the file open mode,
5039 * since it won't do this for flock() locks.
5040 */
f44106e2 5041 switch (request->fl_type) {
55725513
TM		 5042 case F_RDLCK:
5043 if (!(filp->f_mode & FMODE_READ))
5044 return -EBADF;
5045 break;
5046 case F_WRLCK:
5047 if (!(filp->f_mode & FMODE_WRITE))
5048 return -EBADF;
5049 }
5050
1da177e4
LT		 5051 do {
5052 status = nfs4_proc_setlk(state, cmd, request);
5053 if ((status != -EAGAIN) || IS_SETLK(cmd))
5054 break;
5055 timeout = nfs4_set_lock_task_retry(timeout);
5056 status = -ERESTARTSYS;
5057 if (signalled())
5058 break;
5059 } while(status < 0);
1da177e4
LT		 5060 return status;
5061}
5062
888e694c
TM		 5063int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5064{
5065 struct nfs_server *server = NFS_SERVER(state->inode);
5066 struct nfs4_exception exception = { };
5067 int err;
5068
5069 err = nfs4_set_lock_state(state, fl);
5070 if (err != 0)
5071 goto out;
5072 do {
afe6c27c 5073 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5074 switch (err) {
5075 default:
a030889a
WAA		 5076 printk(KERN_ERR "NFS: %s: unhandled error "
5077 "%d.\n", __func__, err);
d5122201 5078 case 0:
965b5d67 5079 case -ESTALE:
d5122201
TM		 5080 goto out;
5081 case -NFS4ERR_EXPIRED:
0ced63d1 5082 nfs4_schedule_stateid_recovery(server, state);
d5122201 5083 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5084 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 5085 nfs4_schedule_lease_recovery(server->nfs_client);
5086 goto out;
74e7bb73
RL		 5087 case -NFS4ERR_BADSESSION:
5088 case -NFS4ERR_BADSLOT:
5089 case -NFS4ERR_BAD_HIGH_SLOT:
5090 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5091 case -NFS4ERR_DEADSESSION:
9f594791 5092 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 5093 goto out;
965b5d67
TM		 5094 case -ERESTARTSYS:
5095 /*
5096 * The show must go on: exit, but mark the
5097 * stateid as needing recovery.
5098 */
a1d0b5ee 5099 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5100 case -NFS4ERR_ADMIN_REVOKED:
5101 case -NFS4ERR_BAD_STATEID:
5102 case -NFS4ERR_OPENMODE:
0400a6b0 5103 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5104 err = 0;
5105 goto out;
168667c4
TM		 5106 case -EKEYEXPIRED:
5107 /*
5108 * User RPCSEC_GSS context has expired.
5109 * We cannot recover this stateid now, so
5110 * skip it and allow recovery thread to
5111 * proceed.
5112 */
5113 err = 0;
5114 goto out;
965b5d67
TM		 5115 case -ENOMEM:
5116 case -NFS4ERR_DENIED:
5117 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5118 err = 0;
5119 goto out;
d5122201
TM		 5120 case -NFS4ERR_DELAY:
5121 break;
5122 }
888e694c
TM		 5123 err = nfs4_handle_exception(server, err, &exception);
5124 } while (exception.retry);
5125out:
5126 return err;
5127}
6b3b5496 5128
cf470c3e
TM		 5129struct nfs_release_lockowner_data {
5130 struct nfs4_lock_state *lsp;
5ae67c4f 5131 struct nfs_server *server;
cf470c3e
TM		 5132 struct nfs_release_lockowner_args args;
5133};
5134
d3c7b7cc
TM		 5135static void nfs4_release_lockowner_release(void *calldata)
5136{
cf470c3e 5137 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5138 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5139 kfree(calldata);
5140}
5141
17280175 5142static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5143 .rpc_release = nfs4_release_lockowner_release,
5144};
5145
cf470c3e 5146int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5147{
5148 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5149 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5150 struct rpc_message msg = {
5151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5152 };
5153
5154 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5155 return -EINVAL;
5156 data = kmalloc(sizeof(*data), GFP_NOFS);
5157 if (!data)
5158 return -ENOMEM;
5159 data->lsp = lsp;
5ae67c4f 5160 data->server = server;
cf470c3e
TM		 5161 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5162 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5163 data->args.lock_owner.s_dev = server->s_dev;
5164 msg.rpc_argp = &data->args;
5165 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5166 return 0;
d3c7b7cc
TM		 5167}
5168
aa1870af
BF		 5169#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5170
64c2ce8b
AK		 5171static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5172 const void *buf, size_t buflen,
5173 int flags, int type)
6b3b5496 5174{
64c2ce8b
AK		 5175 if (strcmp(key, "") != 0)
5176 return -EINVAL;
4b580ee3 5177
64c2ce8b 5178 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5179}
5180
64c2ce8b
AK		 5181static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5182 void *buf, size_t buflen, int type)
6b3b5496 5183{
64c2ce8b
AK		 5184 if (strcmp(key, "") != 0)
5185 return -EINVAL;
aa1870af 5186
64c2ce8b 5187 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5188}
5189
64c2ce8b
AK		 5190static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5191 size_t list_len, const char *name,
5192 size_t name_len, int type)
6b3b5496 5193{
64c2ce8b 5194 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5195
096455a2
BF		 5196 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5197 return 0;
64c2ce8b
AK		 5198
5199 if (list && len <= list_len)
5200 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5201 return len;
6b3b5496
BF		 5202}
5203
533eb461
AA		 5204/*
5205 * nfs_fhget will use either the mounted_on_fileid or the fileid
5206 */
69aaaae1
TM		 5207static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5208{
533eb461
AA		 5209 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5210 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5211 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5212 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5213 return;
5214
5215 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5216 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5217 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5218 fattr->nlink = 2;
5219}
5220
f05d147f
BS		 5221static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5222 const struct qstr *name,
5223 struct nfs4_fs_locations *fs_locations,
5224 struct page *page)
683b57b4
TM		 5225{
5226 struct nfs_server *server = NFS_SERVER(dir);
5227 u32 bitmask[2] = {
361e624f 5228 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5229 };
5230 struct nfs4_fs_locations_arg args = {
5231 .dir_fh = NFS_FH(dir),
c228fd3a 5232 .name = name,
683b57b4
TM		 5233 .page = page,
5234 .bitmask = bitmask,
5235 };
22958463
BH		 5236 struct nfs4_fs_locations_res res = {
5237 .fs_locations = fs_locations,
5238 };
683b57b4
TM		 5239 struct rpc_message msg = {
5240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5241 .rpc_argp = &args,
22958463 5242 .rpc_resp = &res,
683b57b4
TM		 5243 };
5244 int status;
5245
3110ff80 5246 dprintk("%s: start\n", __func__);
533eb461
AA		 5247
5248 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5249 * is not supported */
5250 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5251 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5252 else
5253 bitmask[0] |= FATTR4_WORD0_FILEID;
5254
c228fd3a 5255 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5256 fs_locations->server = server;
830b8e33 5257 fs_locations->nlocations = 0;
f05d147f 5258 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5259 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5260 return status;
5261}
5262
f05d147f
BS		 5263int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5264 const struct qstr *name,
5265 struct nfs4_fs_locations *fs_locations,
5266 struct page *page)
db0a9593
BS		 5267{
5268 struct nfs4_exception exception = { };
5269 int err;
5270 do {
5271 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5272 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5273 &exception);
5274 } while (exception.retry);
5275 return err;
5276}
5277
5a5ea0d4
BS		 5278static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5279{
5280 int status;
5281 struct nfs4_secinfo_arg args = {
5282 .dir_fh = NFS_FH(dir),
5283 .name = name,
5284 };
5285 struct nfs4_secinfo_res res = {
5286 .flavors = flavors,
5287 };
5288 struct rpc_message msg = {
5289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5290 .rpc_argp = &args,
5291 .rpc_resp = &res,
5292 };
5293
5294 dprintk("NFS call secinfo %s\n", name->name);
5295 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5296 dprintk("NFS reply secinfo: %d\n", status);
5297 return status;
5298}
5299
72de53ec
BS		 5300int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5301 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5302{
5303 struct nfs4_exception exception = { };
5304 int err;
5305 do {
5306 err = nfs4_handle_exception(NFS_SERVER(dir),
5307 _nfs4_proc_secinfo(dir, name, flavors),
5308 &exception);
5309 } while (exception.retry);
5310 return err;
5311}
5312
557134a3 5313#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5314/*
5315 * Check the exchange flags returned by the server for invalid flags, having
5316 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5317 * DS flags set.
5318 */
5319static int nfs4_check_cl_exchange_flags(u32 flags)
5320{
5321 if (flags & ~EXCHGID4_FLAG_MASK_R)
5322 goto out_inval;
5323 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5324 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5325 goto out_inval;
5326 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5327 goto out_inval;
5328 return NFS_OK;
5329out_inval:
5330 return -NFS4ERR_INVAL;
5331}
5332
78fe0f41 5333static bool
79d4e1f0
CL		 5334nfs41_same_server_scope(struct nfs41_server_scope *a,
5335 struct nfs41_server_scope *b)
78fe0f41
WAA		 5336{
5337 if (a->server_scope_sz == b->server_scope_sz &&
5338 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5339 return true;
5340
5341 return false;
5342}
5343
7c44f1ae
WAA		 5344/*
5345 * nfs4_proc_bind_conn_to_session()
5346 *
5347 * The 4.1 client currently uses the same TCP connection for the
5348 * fore and backchannel.
5349 */
2cf047c9 5350int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5351{
5352 int status;
5353 struct nfs41_bind_conn_to_session_res res;
5354 struct rpc_message msg = {
5355 .rpc_proc =
5356 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5357 .rpc_argp = clp,
5358 .rpc_resp = &res,
2cf047c9 5359 .rpc_cred = cred,
7c44f1ae
WAA		 5360 };
5361
5362 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5363
5364 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5365 if (unlikely(res.session == NULL)) {
5366 status = -ENOMEM;
5367 goto out;
5368 }
5369
5370 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5371 if (status == 0) {
5372 if (memcmp(res.session->sess_id.data,
5373 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5374 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5375 status = -EIO;
5376 goto out_session;
5377 }
5378 if (res.dir != NFS4_CDFS4_BOTH) {
5379 dprintk("NFS: %s: Unexpected direction from server\n",
5380 __func__);
5381 status = -EIO;
5382 goto out_session;
5383 }
5384 if (res.use_conn_in_rdma_mode) {
5385 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5386 __func__);
5387 status = -EIO;
5388 goto out_session;
5389 }
5390 }
5391out_session:
5392 kfree(res.session);
5393out:
5394 dprintk("<-- %s status= %d\n", __func__, status);
5395 return status;
5396}
5397
99fe60d0
BH		 5398/*
5399 * nfs4_proc_exchange_id()
5400 *
6bbb4ae8
CL		 5401 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5402 *
99fe60d0
BH		 5403 * Since the clientid has expired, all compounds using sessions
5404 * associated with the stale clientid will be returning
5405 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5406 * be in some phase of session reset.
5407 */
4d643d1d 5408int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5409{
5410 nfs4_verifier verifier;
5411 struct nfs41_exchange_id_args args = {
cd93710e 5412 .verifier = &verifier,
99fe60d0 5413 .client = clp,
357f54d6 5414 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5415 };
5416 struct nfs41_exchange_id_res res = {
32b01310 5417 0
99fe60d0
BH		 5418 };
5419 int status;
5420 struct rpc_message msg = {
5421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5422 .rpc_argp = &args,
5423 .rpc_resp = &res,
5424 .rpc_cred = cred,
5425 };
99fe60d0 5426
f092075d 5427 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5428 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5429 sizeof(args.id));
6bbb4ae8
CL		 5430 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5431 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5432 args.id_len, args.id);
99fe60d0 5433
acdeb69d 5434 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5435 GFP_NOFS);
acdeb69d 5436 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5437 status = -ENOMEM;
5438 goto out;
5439 }
78fe0f41 5440
79d4e1f0 5441 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5442 GFP_NOFS);
177313f1 5443 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5444 status = -ENOMEM;
acdeb69d 5445 goto out_server_owner;
abe9a6d5 5446 }
78fe0f41 5447
bbafffd2 5448 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5449 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5450 status = -ENOMEM;
5451 goto out_server_scope;
5452 }
5453
1bd714f2 5454 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5455 if (status == 0)
32b01310 5456 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5457
acdeb69d 5458 if (status == 0) {
32b01310
TM		 5459 clp->cl_clientid = res.clientid;
5460 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5461 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5462 clp->cl_seqid = res.seqid;
5463
acdeb69d
CL		 5464 kfree(clp->cl_serverowner);
5465 clp->cl_serverowner = res.server_owner;
5466 res.server_owner = NULL;
78fe0f41 5467
7d2ed9ac 5468 /* use the most recent implementation id */
59155546
CL		 5469 kfree(clp->cl_implid);
5470 clp->cl_implid = res.impl_id;
7d2ed9ac 5471
177313f1 5472 if (clp->cl_serverscope != NULL &&
79d4e1f0 5473 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5474 res.server_scope)) {
5475 dprintk("%s: server_scope mismatch detected\n",
5476 __func__);
5477 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5478 kfree(clp->cl_serverscope);
5479 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5480 }
5481
177313f1 5482 if (clp->cl_serverscope == NULL) {
79d4e1f0 5483 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5484 goto out;
5485 }
32b01310
TM		 5486 } else
5487 kfree(res.impl_id);
7d2ed9ac 5488
acdeb69d
CL		 5489out_server_owner:
5490 kfree(res.server_owner);
7d2ed9ac 5491out_server_scope:
abe9a6d5
WAA		 5492 kfree(res.server_scope);
5493out:
177313f1 5494 if (clp->cl_implid != NULL)
6bbb4ae8 5495 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5496 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5497 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5498 clp->cl_implid->date.seconds,
5499 clp->cl_implid->date.nseconds);
6bbb4ae8 5500 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5501 return status;
5502}
5503
66245539
TM		 5504static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5505 struct rpc_cred *cred)
5506{
5507 struct rpc_message msg = {
5508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5509 .rpc_argp = clp,
5510 .rpc_cred = cred,
5511 };
5512 int status;
5513
5514 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5515 if (status)
02c67525 5516 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5517 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5518 return status;
5519}
5520
5521static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5522 struct rpc_cred *cred)
5523{
5524 unsigned int loop;
5525 int ret;
5526
5527 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5528 ret = _nfs4_proc_destroy_clientid(clp, cred);
5529 switch (ret) {
5530 case -NFS4ERR_DELAY:
5531 case -NFS4ERR_CLIENTID_BUSY:
5532 ssleep(1);
5533 break;
5534 default:
5535 return ret;
5536 }
5537 }
5538 return 0;
5539}
5540
5541int nfs4_destroy_clientid(struct nfs_client *clp)
5542{
5543 struct rpc_cred *cred;
5544 int ret = 0;
5545
5546 if (clp->cl_mvops->minor_version < 1)
5547 goto out;
5548 if (clp->cl_exchange_flags == 0)
5549 goto out;
05f4c350
CL		 5550 if (clp->cl_preserve_clid)
5551 goto out;
66245539
TM		 5552 cred = nfs4_get_exchange_id_cred(clp);
5553 ret = nfs4_proc_destroy_clientid(clp, cred);
5554 if (cred)
5555 put_rpccred(cred);
5556 switch (ret) {
5557 case 0:
5558 case -NFS4ERR_STALE_CLIENTID:
5559 clp->cl_exchange_flags = 0;
5560 }
5561out:
5562 return ret;
5563}
5564
2050f0cc
AA		 5565struct nfs4_get_lease_time_data {
5566 struct nfs4_get_lease_time_args *args;
5567 struct nfs4_get_lease_time_res *res;
5568 struct nfs_client *clp;
5569};
5570
5571static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5572 void *calldata)
5573{
5574 int ret;
5575 struct nfs4_get_lease_time_data *data =
5576 (struct nfs4_get_lease_time_data *)calldata;
5577
5578 dprintk("--> %s\n", __func__);
689cf5c1 5579 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5580 /* just setup sequence, do not trigger session recovery
5581 since we're invoked within one */
5582 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5583 &data->args->la_seq_args,
9d12b216 5584 &data->res->lr_seq_res, task);
2050f0cc 5585
d3edcf96
TM		 5586 if (ret != -EAGAIN)
5587 rpc_call_start(task);
2050f0cc
AA		 5588 dprintk("<-- %s\n", __func__);
5589}
5590
5591/*
5592 * Called from nfs4_state_manager thread for session setup, so don't recover
5593 * from sequence operation or clientid errors.
5594 */
5595static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5596{
5597 struct nfs4_get_lease_time_data *data =
5598 (struct nfs4_get_lease_time_data *)calldata;
5599
5600 dprintk("--> %s\n", __func__);
14516c3a
TM		 5601 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5602 return;
2050f0cc
AA		 5603 switch (task->tk_status) {
5604 case -NFS4ERR_DELAY:
5605 case -NFS4ERR_GRACE:
5606 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5607 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5608 task->tk_status = 0;
a8a4ae3a
AA		 5609 /* fall through */
5610 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5611 rpc_restart_call_prepare(task);
2050f0cc
AA		 5612 return;
5613 }
2050f0cc
AA		 5614 dprintk("<-- %s\n", __func__);
5615}
5616
17280175 5617static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5618 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5619 .rpc_call_done = nfs4_get_lease_time_done,
5620};
5621
5622int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5623{
5624 struct rpc_task *task;
5625 struct nfs4_get_lease_time_args args;
5626 struct nfs4_get_lease_time_res res = {
5627 .lr_fsinfo = fsinfo,
5628 };
5629 struct nfs4_get_lease_time_data data = {
5630 .args = &args,
5631 .res = &res,
5632 .clp = clp,
5633 };
5634 struct rpc_message msg = {
5635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5636 .rpc_argp = &args,
5637 .rpc_resp = &res,
5638 };
5639 struct rpc_task_setup task_setup = {
5640 .rpc_client = clp->cl_rpcclient,
5641 .rpc_message = &msg,
5642 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5643 .callback_data = &data,
5644 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5645 };
5646 int status;
5647
9d12b216 5648 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5649 dprintk("--> %s\n", __func__);
5650 task = rpc_run_task(&task_setup);
5651
5652 if (IS_ERR(task))
5653 status = PTR_ERR(task);
5654 else {
5655 status = task->tk_status;
5656 rpc_put_task(task);
5657 }
5658 dprintk("<-- %s return %d\n", __func__, status);
5659
5660 return status;
5661}
5662
e3725ec0
TM		 5663struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
5664 u32 max_slots, gfp_t gfp_flags)
f86f36a6 5665{
e3725ec0
TM		 5666 struct nfs4_slot *tbl;
5667 u32 i;
5668
5669 tbl = kmalloc_array(max_slots, sizeof(*tbl), gfp_flags);
5670 if (tbl != NULL) {
df2fabff 5671 for (i = 0; i < max_slots; i++) {
e3725ec0 5672 tbl[i].table = table;
df2fabff
TM		 5673 tbl[i].slot_nr = i;
5674 }
e3725ec0
TM		 5675 }
5676 return tbl;
f86f36a6
TM		 5677}
5678
5679static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5680 struct nfs4_slot *new,
5681 u32 max_slots,
5682 u32 ivalue)
5683{
5684 struct nfs4_slot *old = NULL;
5685 u32 i;
5686
5687 spin_lock(&tbl->slot_tbl_lock);
5688 if (new) {
5689 old = tbl->slots;
5690 tbl->slots = new;
5691 tbl->max_slots = max_slots;
5692 }
f9b1ef5f 5693 tbl->highest_used_slotid = NFS4_NO_SLOT;
f86f36a6
TM		 5694 for (i = 0; i < tbl->max_slots; i++)
5695 tbl->slots[i].seq_nr = ivalue;
5696 spin_unlock(&tbl->slot_tbl_lock);
5697 kfree(old);
5698}
5699
b73dafa7 5700/*
f86f36a6 5701 * (re)Initialise a slot table
b73dafa7 5702 */
f86f36a6
TM		 5703static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5704 u32 ivalue)
ac72b7b3 5705{
104aeba4 5706 struct nfs4_slot *new = NULL;
f86f36a6 5707 int ret = -ENOMEM;
ac72b7b3 5708
104aeba4
AA		 5709 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5710 max_reqs, tbl->max_slots);
ac72b7b3 5711
104aeba4
AA		 5712 /* Does the newly negotiated max_reqs match the existing slot table? */
5713 if (max_reqs != tbl->max_slots) {
e3725ec0 5714 new = nfs4_alloc_slots(tbl, max_reqs, GFP_NOFS);
104aeba4
AA		 5715 if (!new)
5716 goto out;
104aeba4 5717 }
f86f36a6
TM		 5718 ret = 0;
5719
5720 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5721 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5722 tbl, tbl->slots, tbl->max_slots);
5723out:
5724 dprintk("<-- %s: return %d\n", __func__, ret);
5725 return ret;
5726}
5727
f8625a6a
RL		 5728/* Destroy the slot table */
5729static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5730{
5731 if (session->fc_slot_table.slots != NULL) {
5732 kfree(session->fc_slot_table.slots);
5733 session->fc_slot_table.slots = NULL;
5734 }
5735 if (session->bc_slot_table.slots != NULL) {
5736 kfree(session->bc_slot_table.slots);
5737 session->bc_slot_table.slots = NULL;
5738 }
5739 return;
5740}
5741
050047ce 5742/*
aacd5537 5743 * Initialize or reset the forechannel and backchannel tables
050047ce 5744 */
aacd5537 5745static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5746{
f26468fb 5747 struct nfs4_slot_table *tbl;
aacd5537 5748 int status;
050047ce 5749
aacd5537
AA		 5750 dprintk("--> %s\n", __func__);
5751 /* Fore channel */
5752 tbl = &ses->fc_slot_table;
e3725ec0 5753 tbl->session = ses;
f86f36a6
TM		 5754 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5755 if (status) /* -ENOMEM */
5756 return status;
aacd5537
AA		 5757 /* Back channel */
5758 tbl = &ses->bc_slot_table;
e3725ec0 5759 tbl->session = ses;
f86f36a6
TM		 5760 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5761 if (status && tbl->slots == NULL)
5762 /* Fore and back channel share a connection so get
5763 * both slot tables or neither */
5764 nfs4_destroy_slot_tables(ses);
f8625a6a 5765 return status;
557134a3
AA		 5766}
5767
5768struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5769{
5770 struct nfs4_session *session;
5771 struct nfs4_slot_table *tbl;
5772
8535b2be 5773 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5774 if (!session)
5775 return NULL;
76db6d95 5776
557134a3 5777 tbl = &session->fc_slot_table;
45d43c29 5778 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5779 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5780 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5781 init_completion(&tbl->complete);
f8625a6a
RL		 5782
5783 tbl = &session->bc_slot_table;
45d43c29 5784 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5785 spin_lock_init(&tbl->slot_tbl_lock);
5786 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5787 init_completion(&tbl->complete);
f8625a6a 5788
1055d76d
TM		 5789 session->session_state = 1<<NFS4_SESSION_INITING;
5790
557134a3
AA		 5791 session->clp = clp;
5792 return session;
5793}
5794
5795void nfs4_destroy_session(struct nfs4_session *session)
5796{
2446ab60 5797 struct rpc_xprt *xprt;
848f5bda 5798 struct rpc_cred *cred;
2446ab60 5799
848f5bda
TM		 5800 cred = nfs4_get_exchange_id_cred(session->clp);
5801 nfs4_proc_destroy_session(session, cred);
5802 if (cred)
5803 put_rpccred(cred);
2446ab60
TM		 5804
5805 rcu_read_lock();
5806 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5807 rcu_read_unlock();
5a0ffe54 5808 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5809 __func__, xprt);
5810 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5811 nfs4_destroy_slot_tables(session);
557134a3
AA		 5812 kfree(session);
5813}
5814
fc931582
AA		 5815/*
5816 * Initialize the values to be used by the client in CREATE_SESSION
5817 * If nfs4_init_session set the fore channel request and response sizes,
5818 * use them.
5819 *
5820 * Set the back channel max_resp_sz_cached to zero to force the client to
5821 * always set csa_cachethis to FALSE because the current implementation
5822 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5823 */
5824static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5825{
5826 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5827 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5828 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5829
5830 if (mxrqst_sz == 0)
5831 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5832 if (mxresp_sz == 0)
5833 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5834 /* Fore channel attributes */
fc931582
AA		 5835 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5836 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5837 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5838 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5839
5840 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5841 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5842 __func__,
5843 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5844 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5845
5846 /* Back channel attributes */
fc931582
AA		 5847 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5848 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5849 args->bc_attrs.max_resp_sz_cached = 0;
5850 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5851 args->bc_attrs.max_reqs = 1;
5852
5853 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5854 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5855 __func__,
5856 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5857 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5858 args->bc_attrs.max_reqs);
5859}
5860
43c2e885 5861static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5862{
43c2e885
BF		 5863 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5864 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5865
43c2e885
BF		 5866 if (rcvd->max_resp_sz > sent->max_resp_sz)
5867 return -EINVAL;
5868 /*
5869 * Our requested max_ops is the minimum we need; we're not
5870 * prepared to break up compounds into smaller pieces than that.
5871 * So, no point even trying to continue if the server won't
5872 * cooperate:
5873 */
5874 if (rcvd->max_ops < sent->max_ops)
5875 return -EINVAL;
5876 if (rcvd->max_reqs == 0)
5877 return -EINVAL;
b4b9a0c1
VG		 5878 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5879 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5880 return 0;
8d35301d
AA		 5881}
5882
43c2e885
BF		 5883static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5884{
5885 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5886 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5887
43c2e885
BF		 5888 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5889 return -EINVAL;
5890 if (rcvd->max_resp_sz < sent->max_resp_sz)
5891 return -EINVAL;
5892 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5893 return -EINVAL;
5894 /* These would render the backchannel useless: */
b4b9a0c1 5895 if (rcvd->max_ops != sent->max_ops)
43c2e885 5896 return -EINVAL;
b4b9a0c1 5897 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5898 return -EINVAL;
5899 return 0;
5900}
8d35301d 5901
8d35301d
AA		 5902static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5903 struct nfs4_session *session)
5904{
43c2e885 5905 int ret;
8d35301d 5906
43c2e885
BF		 5907 ret = nfs4_verify_fore_channel_attrs(args, session);
5908 if (ret)
5909 return ret;
5910 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5911}
5912
848f5bda
TM		 5913static int _nfs4_proc_create_session(struct nfs_client *clp,
5914 struct rpc_cred *cred)
fc931582
AA		 5915{
5916 struct nfs4_session *session = clp->cl_session;
5917 struct nfs41_create_session_args args = {
5918 .client = clp,
5919 .cb_program = NFS4_CALLBACK,
5920 };
5921 struct nfs41_create_session_res res = {
5922 .client = clp,
5923 };
5924 struct rpc_message msg = {
5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5926 .rpc_argp = &args,
5927 .rpc_resp = &res,
848f5bda 5928 .rpc_cred = cred,
fc931582
AA		 5929 };
5930 int status;
5931
5932 nfs4_init_channel_attrs(&args);
0f91421e 5933 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5934
1bd714f2 5935 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5936
43095d39 5937 if (!status) {
8d35301d
AA		 5938 /* Verify the session's negotiated channel_attrs values */
5939 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5940 /* Increment the clientid slot sequence id */
5941 clp->cl_seqid++;
5942 }
5943
5944 return status;
5945}
5946
5947/*
5948 * Issues a CREATE_SESSION operation to the server.
5949 * It is the responsibility of the caller to verify the session is
5950 * expired before calling this routine.
5951 */
848f5bda 5952int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5953{
5954 int status;
5955 unsigned *ptr;
fc931582
AA		 5956 struct nfs4_session *session = clp->cl_session;
5957
5958 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5959
848f5bda 5960 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5961 if (status)
5962 goto out;
5963
aacd5537
AA		 5964 /* Init or reset the session slot tables */
5965 status = nfs4_setup_session_slot_tables(session);
5966 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5967 if (status)
5968 goto out;
5969
5970 ptr = (unsigned *)&session->sess_id.data[0];
5971 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5972 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5973out:
5974 dprintk("<-- %s\n", __func__);
5975 return status;
5976}
5977
0f3e66c6
AA		 5978/*
5979 * Issue the over-the-wire RPC DESTROY_SESSION.
5980 * The caller must serialize access to this routine.
5981 */
848f5bda
TM		 5982int nfs4_proc_destroy_session(struct nfs4_session *session,
5983 struct rpc_cred *cred)
0f3e66c6 5984{
848f5bda
TM		 5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5987 .rpc_argp = session,
5988 .rpc_cred = cred,
5989 };
0f3e66c6 5990 int status = 0;
0f3e66c6
AA		 5991
5992 dprintk("--> nfs4_proc_destroy_session\n");
5993
5994 /* session is still being setup */
5995 if (session->clp->cl_cons_state != NFS_CS_READY)
5996 return status;
5997
1bd714f2 5998 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5999
6000 if (status)
08106ac7 6001 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6002 "Session has been destroyed regardless...\n", status);
6003
6004 dprintk("<-- nfs4_proc_destroy_session\n");
6005 return status;
6006}
6007
7b38c368
TM		 6008/*
6009 * With sessions, the client is not marked ready until after a
6010 * successful EXCHANGE_ID and CREATE_SESSION.
6011 *
6012 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6013 * other versions of NFS can be tried.
6014 */
6015static int nfs41_check_session_ready(struct nfs_client *clp)
6016{
6017 int ret;
6018
6019 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6020 ret = nfs4_client_recover_expired_lease(clp);
6021 if (ret)
6022 return ret;
6023 }
6024 if (clp->cl_cons_state < NFS_CS_READY)
6025 return -EPROTONOSUPPORT;
54ac471c 6026 smp_rmb();
7b38c368
TM		 6027 return 0;
6028}
6029
fccba804
TM		 6030int nfs4_init_session(struct nfs_server *server)
6031{
6032 struct nfs_client *clp = server->nfs_client;
2449ea2e 6033 struct nfs4_session *session;
ae72ae67
TM		 6034 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6035 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
fccba804
TM		 6036
6037 if (!nfs4_has_session(clp))
6038 return 0;
6039
ae72ae67
TM		 6040 if (server->rsize != 0)
6041 target_max_resp_sz = server->rsize;
6042 target_max_resp_sz += nfs41_maxread_overhead;
6043
6044 if (server->wsize != 0)
6045 target_max_rqst_sz = server->wsize;
6046 target_max_rqst_sz += nfs41_maxwrite_overhead;
6047
1055d76d 6048 session = clp->cl_session;
7b38c368
TM		 6049 spin_lock(&clp->cl_lock);
6050 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
ae72ae67
TM		 6051 /* Initialise targets and channel attributes */
6052 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6053 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6054 session->fc_target_max_resp_sz = target_max_resp_sz;
6055 session->fc_attrs.max_resp_sz = target_max_resp_sz;
688a9024
TM		 6056 } else {
6057 /* Just adjust the targets */
6058 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6059 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6060 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6061 }
6062 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6063 session->fc_target_max_resp_sz = target_max_resp_sz;
6064 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6065 }
7b38c368
TM		 6066 }
6067 spin_unlock(&clp->cl_lock);
2449ea2e 6068
688a9024
TM		 6069 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6070 nfs4_schedule_lease_recovery(clp);
6071
7b38c368 6072 return nfs41_check_session_ready(clp);
fccba804
TM		 6073}
6074
7b38c368 6075int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 6076{
6077 struct nfs4_session *session = clp->cl_session;
6078 int ret;
6079
7b38c368
TM		 6080 spin_lock(&clp->cl_lock);
6081 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6082 /*
6083 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6084 * DS lease to be equal to the MDS lease.
6085 */
6086 clp->cl_lease_time = lease_time;
6087 clp->cl_last_renewal = jiffies;
6088 }
6089 spin_unlock(&clp->cl_lock);
d83217c1 6090
7b38c368
TM		 6091 ret = nfs41_check_session_ready(clp);
6092 if (ret)
6093 return ret;
6094 /* Test for the DS role */
6095 if (!is_ds_client(clp))
6096 return -ENODEV;
6097 return 0;
d83217c1
AA		 6098}
6099EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6100
6101
fc01cea9
AA		 6102/*
6103 * Renew the cl_session lease.
6104 */
d5f8d3fe
TM		 6105struct nfs4_sequence_data {
6106 struct nfs_client *clp;
6107 struct nfs4_sequence_args args;
6108 struct nfs4_sequence_res res;
6109};
6110
dc96aef9
AB		 6111static void nfs41_sequence_release(void *data)
6112{
d5f8d3fe
TM		 6113 struct nfs4_sequence_data *calldata = data;
6114 struct nfs_client *clp = calldata->clp;
dc96aef9 6115
7135840f
AB		 6116 if (atomic_read(&clp->cl_count) > 1)
6117 nfs4_schedule_state_renewal(clp);
6118 nfs_put_client(clp);
d5f8d3fe 6119 kfree(calldata);
dc96aef9
AB		 6120}
6121
aa5190d0
TM		 6122static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6123{
6124 switch(task->tk_status) {
6125 case -NFS4ERR_DELAY:
aa5190d0
TM		 6126 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6127 return -EAGAIN;
6128 default:
0400a6b0 6129 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6130 }
6131 return 0;
6132}
6133
dc96aef9 6134static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6135{
d5f8d3fe
TM		 6136 struct nfs4_sequence_data *calldata = data;
6137 struct nfs_client *clp = calldata->clp;
fc01cea9 6138
14516c3a
TM		 6139 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6140 return;
fc01cea9
AA		 6141
6142 if (task->tk_status < 0) {
6143 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6144 if (atomic_read(&clp->cl_count) == 1)
6145 goto out;
fc01cea9 6146
aa5190d0
TM		 6147 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6148 rpc_restart_call_prepare(task);
fc01cea9
AA		 6149 return;
6150 }
6151 }
fc01cea9 6152 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6153out:
fc01cea9
AA		 6154 dprintk("<-- %s\n", __func__);
6155}
6156
6157static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6158{
d5f8d3fe
TM		 6159 struct nfs4_sequence_data *calldata = data;
6160 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6161 struct nfs4_sequence_args *args;
6162 struct nfs4_sequence_res *res;
6163
fc01cea9
AA		 6164 args = task->tk_msg.rpc_argp;
6165 res = task->tk_msg.rpc_resp;
6166
9d12b216 6167 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6168 return;
6169 rpc_call_start(task);
6170}
6171
6bdb5f21
BS		 6172static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6173{
6174 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6175 nfs41_sequence_prepare(task, data);
6176}
6177
fc01cea9
AA		 6178static const struct rpc_call_ops nfs41_sequence_ops = {
6179 .rpc_call_done = nfs41_sequence_call_done,
6180 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6181 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6182};
6183
6bdb5f21
BS		 6184static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6185 .rpc_call_done = nfs41_sequence_call_done,
6186 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6187 .rpc_release = nfs41_sequence_release,
6188};
6189
6190static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6191 const struct rpc_call_ops *seq_ops)
fc01cea9 6192{
d5f8d3fe 6193 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6194 struct rpc_message msg = {
6195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6196 .rpc_cred = cred,
6197 };
71ac6da9
TM		 6198 struct rpc_task_setup task_setup_data = {
6199 .rpc_client = clp->cl_rpcclient,
6200 .rpc_message = &msg,
6bdb5f21 6201 .callback_ops = seq_ops,
71ac6da9
TM		 6202 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6203 };
fc01cea9 6204
7135840f 6205 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6206 return ERR_PTR(-EIO);
dfb4f309 6207 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6208 if (calldata == NULL) {
7135840f 6209 nfs_put_client(clp);
71ac6da9 6210 return ERR_PTR(-ENOMEM);
fc01cea9 6211 }
9d12b216 6212 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6213 msg.rpc_argp = &calldata->args;
6214 msg.rpc_resp = &calldata->res;
6215 calldata->clp = clp;
71ac6da9 6216 task_setup_data.callback_data = calldata;
fc01cea9 6217
71ac6da9
TM		 6218 return rpc_run_task(&task_setup_data);
6219}
6220
2f60ea6b 6221static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6222{
6223 struct rpc_task *task;
6224 int ret = 0;
6225
2f60ea6b
TM		 6226 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6227 return 0;
6bdb5f21 6228 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
71ac6da9
TM		 6229 if (IS_ERR(task))
6230 ret = PTR_ERR(task);
6231 else
bf294b41 6232 rpc_put_task_async(task);
71ac6da9
TM		 6233 dprintk("<-- %s status=%d\n", __func__, ret);
6234 return ret;
6235}
6236
6237static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6238{
6239 struct rpc_task *task;
6240 int ret;
6241
6bdb5f21 6242 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
71ac6da9
TM		 6243 if (IS_ERR(task)) {
6244 ret = PTR_ERR(task);
6245 goto out;
6246 }
6247 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6248 if (!ret) {
6249 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6250
6251 if (task->tk_status == 0)
6252 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6253 ret = task->tk_status;
b4410c2f 6254 }
71ac6da9
TM		 6255 rpc_put_task(task);
6256out:
6257 dprintk("<-- %s status=%d\n", __func__, ret);
6258 return ret;
fc01cea9
AA		 6259}
6260
fce5c838
RL		 6261struct nfs4_reclaim_complete_data {
6262 struct nfs_client *clp;
6263 struct nfs41_reclaim_complete_args arg;
6264 struct nfs41_reclaim_complete_res res;
6265};
6266
6267static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6268{
6269 struct nfs4_reclaim_complete_data *calldata = data;
6270
b257957e 6271 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6272 if (nfs41_setup_sequence(calldata->clp->cl_session,
6273 &calldata->arg.seq_args,
9d12b216 6274 &calldata->res.seq_res, task))
fce5c838
RL		 6275 return;
6276
6277 rpc_call_start(task);
6278}
6279
aa5190d0
TM		 6280static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6281{
6282 switch(task->tk_status) {
6283 case 0:
6284 case -NFS4ERR_COMPLETE_ALREADY:
6285 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6286 break;
6287 case -NFS4ERR_DELAY:
aa5190d0 6288 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6289 /* fall through */
6290 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6291 return -EAGAIN;
6292 default:
0400a6b0 6293 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6294 }
6295 return 0;
6296}
6297
fce5c838
RL		 6298static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6299{
6300 struct nfs4_reclaim_complete_data *calldata = data;
6301 struct nfs_client *clp = calldata->clp;
6302 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6303
6304 dprintk("--> %s\n", __func__);
14516c3a
TM		 6305 if (!nfs41_sequence_done(task, res))
6306 return;
fce5c838 6307
aa5190d0
TM		 6308 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6309 rpc_restart_call_prepare(task);
6310 return;
6311 }
fce5c838
RL		 6312 dprintk("<-- %s\n", __func__);
6313}
6314
6315static void nfs4_free_reclaim_complete_data(void *data)
6316{
6317 struct nfs4_reclaim_complete_data *calldata = data;
6318
6319 kfree(calldata);
6320}
6321
6322static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6323 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6324 .rpc_call_done = nfs4_reclaim_complete_done,
6325 .rpc_release = nfs4_free_reclaim_complete_data,
6326};
6327
6328/*
6329 * Issue a global reclaim complete.
6330 */
6331static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6332{
6333 struct nfs4_reclaim_complete_data *calldata;
6334 struct rpc_task *task;
6335 struct rpc_message msg = {
6336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6337 };
6338 struct rpc_task_setup task_setup_data = {
6339 .rpc_client = clp->cl_rpcclient,
6340 .rpc_message = &msg,
6341 .callback_ops = &nfs4_reclaim_complete_call_ops,
6342 .flags = RPC_TASK_ASYNC,
6343 };
6344 int status = -ENOMEM;
6345
6346 dprintk("--> %s\n", __func__);
8535b2be 6347 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6348 if (calldata == NULL)
6349 goto out;
6350 calldata->clp = clp;
6351 calldata->arg.one_fs = 0;
fce5c838 6352
9d12b216 6353 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6354 msg.rpc_argp = &calldata->arg;
6355 msg.rpc_resp = &calldata->res;
6356 task_setup_data.callback_data = calldata;
6357 task = rpc_run_task(&task_setup_data);
acf82b85 6358 if (IS_ERR(task)) {
fce5c838 6359 status = PTR_ERR(task);
acf82b85
DC		 6360 goto out;
6361 }
c34c32ea
AA		 6362 status = nfs4_wait_for_completion_rpc_task(task);
6363 if (status == 0)
6364 status = task->tk_status;
fce5c838 6365 rpc_put_task(task);
acf82b85 6366 return 0;
fce5c838
RL		 6367out:
6368 dprintk("<-- %s status=%d\n", __func__, status);
6369 return status;
6370}
b1f69b75
AA		 6371
6372static void
6373nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6374{
6375 struct nfs4_layoutget *lgp = calldata;
c31663d4 6376 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6377
6378 dprintk("--> %s\n", __func__);
c31663d4
FI		 6379 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6380 * right now covering the LAYOUTGET we are about to send.
6381 * However, that is not so catastrophic, and there seems
6382 * to be no way to prevent it completely.
6383 */
b1f69b75 6384 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6385 &lgp->res.seq_res, task))
b1f69b75 6386 return;
cf7d63f1
FI		 6387 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6388 NFS_I(lgp->args.inode)->layout,
6389 lgp->args.ctx->state)) {
6390 rpc_exit(task, NFS4_OK);
6391 return;
6392 }
b1f69b75
AA		 6393 rpc_call_start(task);
6394}
6395
6396static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6397{
6398 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6399 struct inode *inode = lgp->args.inode;
6400 struct nfs_server *server = NFS_SERVER(inode);
6401 struct pnfs_layout_hdr *lo;
6402 struct nfs4_state *state = NULL;
b1f69b75
AA		 6403
6404 dprintk("--> %s\n", __func__);
6405
6406 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6407 goto out;
b1f69b75
AA		 6408
6409 switch (task->tk_status) {
6410 case 0:
ee314c2a 6411 goto out;
b1f69b75
AA		 6412 case -NFS4ERR_LAYOUTTRYLATER:
6413 case -NFS4ERR_RECALLCONFLICT:
6414 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6415 break;
6416 case -NFS4ERR_EXPIRED:
6417 case -NFS4ERR_BAD_STATEID:
6418 spin_lock(&inode->i_lock);
6419 lo = NFS_I(inode)->layout;
6420 if (!lo || list_empty(&lo->plh_segs)) {
6421 spin_unlock(&inode->i_lock);
6422 /* If the open stateid was bad, then recover it. */
6423 state = lgp->args.ctx->state;
6424 } else {
6425 LIST_HEAD(head);
6426
6427 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6428 spin_unlock(&inode->i_lock);
6429 /* Mark the bad layout state as invalid, then
6430 * retry using the open stateid. */
6431 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6432 }
6433 }
ee314c2a
TM		 6434 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6435 rpc_restart_call_prepare(task);
6436out:
b1f69b75
AA		 6437 dprintk("<-- %s\n", __func__);
6438}
6439
8554116e
IK		 6440static size_t max_response_pages(struct nfs_server *server)
6441{
6442 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6443 return nfs_page_array_len(0, max_resp_sz);
6444}
6445
6446static void nfs4_free_pages(struct page **pages, size_t size)
6447{
6448 int i;
6449
6450 if (!pages)
6451 return;
6452
6453 for (i = 0; i < size; i++) {
6454 if (!pages[i])
6455 break;
6456 __free_page(pages[i]);
6457 }
6458 kfree(pages);
6459}
6460
6461static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6462{
6463 struct page **pages;
6464 int i;
6465
6466 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6467 if (!pages) {
6468 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6469 return NULL;
6470 }
6471
6472 for (i = 0; i < size; i++) {
6473 pages[i] = alloc_page(gfp_flags);
6474 if (!pages[i]) {
6475 dprintk("%s: failed to allocate page\n", __func__);
6476 nfs4_free_pages(pages, size);
6477 return NULL;
6478 }
6479 }
6480
6481 return pages;
6482}
6483
b1f69b75
AA		 6484static void nfs4_layoutget_release(void *calldata)
6485{
6486 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6487 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6488 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6489
6490 dprintk("--> %s\n", __func__);
8554116e 6491 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6492 put_nfs_open_context(lgp->args.ctx);
6493 kfree(calldata);
6494 dprintk("<-- %s\n", __func__);
6495}
6496
6497static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6498 .rpc_call_prepare = nfs4_layoutget_prepare,
6499 .rpc_call_done = nfs4_layoutget_done,
6500 .rpc_release = nfs4_layoutget_release,
6501};
6502
a0b0a6e3
TM		 6503struct pnfs_layout_segment *
6504nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6505{
6506 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6507 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6508 struct rpc_task *task;
6509 struct rpc_message msg = {
6510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6511 .rpc_argp = &lgp->args,
6512 .rpc_resp = &lgp->res,
6513 };
6514 struct rpc_task_setup task_setup_data = {
6515 .rpc_client = server->client,
6516 .rpc_message = &msg,
6517 .callback_ops = &nfs4_layoutget_call_ops,
6518 .callback_data = lgp,
6519 .flags = RPC_TASK_ASYNC,
6520 };
a0b0a6e3 6521 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6522 int status = 0;
6523
6524 dprintk("--> %s\n", __func__);
6525
8554116e
IK		 6526 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6527 if (!lgp->args.layout.pages) {
6528 nfs4_layoutget_release(lgp);
a0b0a6e3 6529 return ERR_PTR(-ENOMEM);
8554116e
IK		 6530 }
6531 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6532
35124a09 6533 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6534 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6535 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6536 task = rpc_run_task(&task_setup_data);
6537 if (IS_ERR(task))
a0b0a6e3 6538 return ERR_CAST(task);
b1f69b75 6539 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6540 if (status == 0)
6541 status = task->tk_status;
6542 if (status == 0)
a0b0a6e3 6543 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6544 rpc_put_task(task);
6545 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6546 if (status)
6547 return ERR_PTR(status);
6548 return lseg;
b1f69b75
AA		 6549}
6550
cbe82603
BH		 6551static void
6552nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6553{
6554 struct nfs4_layoutreturn *lrp = calldata;
6555
6556 dprintk("--> %s\n", __func__);
6557 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6558 &lrp->res.seq_res, task))
cbe82603
BH		 6559 return;
6560 rpc_call_start(task);
6561}
6562
6563static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6564{
6565 struct nfs4_layoutreturn *lrp = calldata;
6566 struct nfs_server *server;
6567
6568 dprintk("--> %s\n", __func__);
6569
6570 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6571 return;
6572
6573 server = NFS_SERVER(lrp->args.inode);
6574 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6575 rpc_restart_call_prepare(task);
cbe82603
BH		 6576 return;
6577 }
cbe82603
BH		 6578 dprintk("<-- %s\n", __func__);
6579}
6580
6581static void nfs4_layoutreturn_release(void *calldata)
6582{
6583 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6584 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6585
6586 dprintk("--> %s\n", __func__);
849b286f
TM		 6587 spin_lock(&lo->plh_inode->i_lock);
6588 if (lrp->res.lrs_present)
6589 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6590 lo->plh_block_lgets--;
6591 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6592 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6593 kfree(calldata);
6594 dprintk("<-- %s\n", __func__);
6595}
6596
6597static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6598 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6599 .rpc_call_done = nfs4_layoutreturn_done,
6600 .rpc_release = nfs4_layoutreturn_release,
6601};
6602
6603int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6604{
6605 struct rpc_task *task;
6606 struct rpc_message msg = {
6607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6608 .rpc_argp = &lrp->args,
6609 .rpc_resp = &lrp->res,
6610 };
6611 struct rpc_task_setup task_setup_data = {
6612 .rpc_client = lrp->clp->cl_rpcclient,
6613 .rpc_message = &msg,
6614 .callback_ops = &nfs4_layoutreturn_call_ops,
6615 .callback_data = lrp,
6616 };
6617 int status;
6618
6619 dprintk("--> %s\n", __func__);
9d12b216 6620 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6621 task = rpc_run_task(&task_setup_data);
6622 if (IS_ERR(task))
6623 return PTR_ERR(task);
6624 status = task->tk_status;
6625 dprintk("<-- %s status=%d\n", __func__, status);
6626 rpc_put_task(task);
6627 return status;
6628}
6629
7f11d8d3
AA		 6630/*
6631 * Retrieve the list of Data Server devices from the MDS.
6632 */
6633static int _nfs4_getdevicelist(struct nfs_server *server,
6634 const struct nfs_fh *fh,
6635 struct pnfs_devicelist *devlist)
6636{
6637 struct nfs4_getdevicelist_args args = {
6638 .fh = fh,
6639 .layoutclass = server->pnfs_curr_ld->id,
6640 };
6641 struct nfs4_getdevicelist_res res = {
6642 .devlist = devlist,
6643 };
6644 struct rpc_message msg = {
6645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6646 .rpc_argp = &args,
6647 .rpc_resp = &res,
6648 };
6649 int status;
6650
6651 dprintk("--> %s\n", __func__);
6652 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6653 &res.seq_res, 0);
6654 dprintk("<-- %s status=%d\n", __func__, status);
6655 return status;
6656}
6657
6658int nfs4_proc_getdevicelist(struct nfs_server *server,
6659 const struct nfs_fh *fh,
6660 struct pnfs_devicelist *devlist)
6661{
6662 struct nfs4_exception exception = { };
6663 int err;
6664
6665 do {
6666 err = nfs4_handle_exception(server,
6667 _nfs4_getdevicelist(server, fh, devlist),
6668 &exception);
6669 } while (exception.retry);
6670
6671 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6672 err, devlist->num_devs);
6673
6674 return err;
6675}
6676EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6677
b1f69b75
AA		 6678static int
6679_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6680{
6681 struct nfs4_getdeviceinfo_args args = {
6682 .pdev = pdev,
6683 };
6684 struct nfs4_getdeviceinfo_res res = {
6685 .pdev = pdev,
6686 };
6687 struct rpc_message msg = {
6688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6689 .rpc_argp = &args,
6690 .rpc_resp = &res,
6691 };
6692 int status;
6693
6694 dprintk("--> %s\n", __func__);
7c513058 6695 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6696 dprintk("<-- %s status=%d\n", __func__, status);
6697
6698 return status;
6699}
6700
6701int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6702{
6703 struct nfs4_exception exception = { };
6704 int err;
6705
6706 do {
6707 err = nfs4_handle_exception(server,
6708 _nfs4_proc_getdeviceinfo(server, pdev),
6709 &exception);
6710 } while (exception.retry);
6711 return err;
6712}
6713EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6714
863a3c6c
AA		 6715static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6716{
6717 struct nfs4_layoutcommit_data *data = calldata;
6718 struct nfs_server *server = NFS_SERVER(data->args.inode);
6719
6720 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6721 &data->res.seq_res, task))
863a3c6c
AA		 6722 return;
6723 rpc_call_start(task);
6724}
6725
6726static void
6727nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6728{
6729 struct nfs4_layoutcommit_data *data = calldata;
6730 struct nfs_server *server = NFS_SERVER(data->args.inode);
6731
6732 if (!nfs4_sequence_done(task, &data->res.seq_res))
6733 return;
6734
6735 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6736 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6737 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6738 case -NFS4ERR_BADLAYOUT: /* no layout */
6739 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6740 task->tk_status = 0;
e59d27e0
TM		 6741 break;
6742 case 0:
863a3c6c
AA		 6743 nfs_post_op_update_inode_force_wcc(data->args.inode,
6744 data->res.fattr);
e59d27e0
TM		 6745 break;
6746 default:
6747 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6748 rpc_restart_call_prepare(task);
6749 return;
6750 }
6751 }
863a3c6c
AA		 6752}
6753
6754static void nfs4_layoutcommit_release(void *calldata)
6755{
6756 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6757 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6758 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6759
db29c089 6760 pnfs_cleanup_layoutcommit(data);
863a3c6c 6761 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6762 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6763 list_del_init(&lseg->pls_lc_list);
6764 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6765 &lseg->pls_flags))
9369a431 6766 pnfs_put_lseg(lseg);
a9bae566 6767 }
92407e75
PT		 6768
6769 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6770 smp_mb__after_clear_bit();
6771 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6772
863a3c6c
AA		 6773 put_rpccred(data->cred);
6774 kfree(data);
6775}
6776
6777static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6778 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6779 .rpc_call_done = nfs4_layoutcommit_done,
6780 .rpc_release = nfs4_layoutcommit_release,
6781};
6782
6783int
ef311537 6784nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6785{
6786 struct rpc_message msg = {
6787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6788 .rpc_argp = &data->args,
6789 .rpc_resp = &data->res,
6790 .rpc_cred = data->cred,
6791 };
6792 struct rpc_task_setup task_setup_data = {
6793 .task = &data->task,
6794 .rpc_client = NFS_CLIENT(data->args.inode),
6795 .rpc_message = &msg,
6796 .callback_ops = &nfs4_layoutcommit_ops,
6797 .callback_data = data,
6798 .flags = RPC_TASK_ASYNC,
6799 };
6800 struct rpc_task *task;
6801 int status = 0;
6802
6803 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6804 "lbw: %llu inode %lu\n",
6805 data->task.tk_pid, sync,
6806 data->args.lastbytewritten,
6807 data->args.inode->i_ino);
6808
9d12b216 6809 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6810 task = rpc_run_task(&task_setup_data);
6811 if (IS_ERR(task))
6812 return PTR_ERR(task);
ef311537 6813 if (sync == false)
863a3c6c
AA		 6814 goto out;
6815 status = nfs4_wait_for_completion_rpc_task(task);
6816 if (status != 0)
6817 goto out;
6818 status = task->tk_status;
6819out:
6820 dprintk("%s: status %d\n", __func__, status);
6821 rpc_put_task(task);
6822 return status;
6823}
fca78d6d
BS		 6824
6825static int
6826_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6827 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6828{
6829 struct nfs41_secinfo_no_name_args args = {
6830 .style = SECINFO_STYLE_CURRENT_FH,
6831 };
6832 struct nfs4_secinfo_res res = {
6833 .flavors = flavors,
6834 };
6835 struct rpc_message msg = {
6836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6837 .rpc_argp = &args,
6838 .rpc_resp = &res,
6839 };
6840 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6841}
6842
6843static int
6844nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6845 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6846{
6847 struct nfs4_exception exception = { };
6848 int err;
6849 do {
6850 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6851 switch (err) {
6852 case 0:
6853 case -NFS4ERR_WRONGSEC:
6854 case -NFS4ERR_NOTSUPP:
05e9cfb4 6855 goto out;
fca78d6d
BS		 6856 default:
6857 err = nfs4_handle_exception(server, err, &exception);
6858 }
6859 } while (exception.retry);
05e9cfb4 6860out:
fca78d6d
BS		 6861 return err;
6862}
6863
6864static int
6865nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6866 struct nfs_fsinfo *info)
6867{
6868 int err;
6869 struct page *page;
6870 rpc_authflavor_t flavor;
6871 struct nfs4_secinfo_flavors *flavors;
6872
6873 page = alloc_page(GFP_KERNEL);
6874 if (!page) {
6875 err = -ENOMEM;
6876 goto out;
6877 }
6878
6879 flavors = page_address(page);
6880 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6881
6882 /*
6883 * Fall back on "guess and check" method if
6884 * the server doesn't support SECINFO_NO_NAME
6885 */
6886 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6887 err = nfs4_find_root_sec(server, fhandle, info);
6888 goto out_freepage;
6889 }
6890 if (err)
6891 goto out_freepage;
6892
6893 flavor = nfs_find_best_sec(flavors);
6894 if (err == 0)
6895 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6896
6897out_freepage:
6898 put_page(page);
6899 if (err == -EACCES)
6900 return -EPERM;
6901out:
6902 return err;
6903}
1cab0652
BS		 6904
6905static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6906{
6907 int status;
6908 struct nfs41_test_stateid_args args = {
1cab0652 6909 .stateid = stateid,
7d974794
BS		 6910 };
6911 struct nfs41_test_stateid_res res;
6912 struct rpc_message msg = {
6913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6914 .rpc_argp = &args,
6915 .rpc_resp = &res,
6916 };
1cab0652 6917
38527b15 6918 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6919 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6920 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6921 if (status != NFS_OK) {
6922 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6923 return status;
38527b15
CL		 6924 }
6925 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6926 return -res.status;
7d974794
BS		 6927}
6928
38527b15
CL		 6929/**
6930 * nfs41_test_stateid - perform a TEST_STATEID operation
6931 *
6932 * @server: server / transport on which to perform the operation
6933 * @stateid: state ID to test
6934 *
6935 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6936 * Otherwise a negative NFS4ERR value is returned if the operation
6937 * failed or the state ID is not currently valid.
6938 */
1cab0652 6939static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6940{
6941 struct nfs4_exception exception = { };
6942 int err;
6943 do {
377e507d
CL		 6944 err = _nfs41_test_stateid(server, stateid);
6945 if (err != -NFS4ERR_DELAY)
6946 break;
6947 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6948 } while (exception.retry);
6949 return err;
6950}
9aeda35f 6951
1cab0652 6952static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6953{
9aeda35f 6954 struct nfs41_free_stateid_args args = {
1cab0652 6955 .stateid = stateid,
9aeda35f
BS		 6956 };
6957 struct nfs41_free_stateid_res res;
6958 struct rpc_message msg = {
6959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6960 .rpc_argp = &args,
6961 .rpc_resp = &res,
6962 };
38527b15 6963 int status;
9aeda35f 6964
38527b15 6965 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6966 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6967 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6968 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6969 dprintk("NFS reply free_stateid: %d\n", status);
6970 return status;
9aeda35f
BS		 6971}
6972
38527b15
CL		 6973/**
6974 * nfs41_free_stateid - perform a FREE_STATEID operation
6975 *
6976 * @server: server / transport on which to perform the operation
6977 * @stateid: state ID to release
6978 *
6979 * Returns NFS_OK if the server freed "stateid". Otherwise a
6980 * negative NFS4ERR value is returned.
6981 */
1cab0652 6982static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6983{
6984 struct nfs4_exception exception = { };
6985 int err;
6986 do {
377e507d
CL		 6987 err = _nfs4_free_stateid(server, stateid);
6988 if (err != -NFS4ERR_DELAY)
6989 break;
6990 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6991 } while (exception.retry);
6992 return err;
6993}
36281caa
TM		 6994
6995static bool nfs41_match_stateid(const nfs4_stateid *s1,
6996 const nfs4_stateid *s2)
6997{
2d2f24ad 6998 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6999 return false;
7000
2d2f24ad 7001 if (s1->seqid == s2->seqid)
36281caa 7002 return true;
2d2f24ad 7003 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7004 return true;
7005
7006 return false;
7007}
7008
557134a3
AA		 7009#endif /* CONFIG_NFS_V4_1 */
7010
36281caa
TM		 7011static bool nfs4_match_stateid(const nfs4_stateid *s1,
7012 const nfs4_stateid *s2)
7013{
f597c537 7014 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7015}
7016
7017
17280175 7018static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7019 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7020 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7021 .recover_open = nfs4_open_reclaim,
7022 .recover_lock = nfs4_lock_reclaim,
591d71cb 7023 .establish_clid = nfs4_init_clientid,
90a16617 7024 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7025 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7026};
7027
591d71cb 7028#if defined(CONFIG_NFS_V4_1)
17280175 7029static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7030 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7031 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7032 .recover_open = nfs4_open_reclaim,
7033 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7034 .establish_clid = nfs41_init_clientid,
b4b82607 7035 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7036 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7037 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7038};
7039#endif /* CONFIG_NFS_V4_1 */
7040
17280175 7041static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7042 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7043 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7044 .recover_open = nfs4_open_expired,
7045 .recover_lock = nfs4_lock_expired,
7046 .establish_clid = nfs4_init_clientid,
90a16617 7047 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7048};
7049
7050#if defined(CONFIG_NFS_V4_1)
17280175 7051static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7052 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7053 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7054 .recover_open = nfs41_open_expired,
7055 .recover_lock = nfs41_lock_expired,
4d643d1d 7056 .establish_clid = nfs41_init_clientid,
b4b82607 7057 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7058};
591d71cb 7059#endif /* CONFIG_NFS_V4_1 */
1da177e4 7060
17280175 7061static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7062 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7063 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7064 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7065};
7066
7067#if defined(CONFIG_NFS_V4_1)
17280175 7068static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7069 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7070 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7071 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7072};
7073#endif
7074
97dc1359
TM		 7075static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7076 .minor_version = 0,
7077 .call_sync = _nfs4_call_sync,
36281caa 7078 .match_stateid = nfs4_match_stateid,
fca78d6d 7079 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 7080 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7081 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7082 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7083};
7084
7085#if defined(CONFIG_NFS_V4_1)
7086static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7087 .minor_version = 1,
7088 .call_sync = _nfs4_call_sync_session,
36281caa 7089 .match_stateid = nfs41_match_stateid,
fca78d6d 7090 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 7091 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7092 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7093 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7094};
7095#endif
7096
97dc1359
TM		 7097const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7098 [0] = &nfs_v4_0_minor_ops,
7099#if defined(CONFIG_NFS_V4_1)
7100 [1] = &nfs_v4_1_minor_ops,
7101#endif
7102};
7103
73a79706
BS		 7104const struct inode_operations nfs4_dir_inode_operations = {
7105 .create = nfs_create,
7106 .lookup = nfs_lookup,
7107 .atomic_open = nfs_atomic_open,
7108 .link = nfs_link,
7109 .unlink = nfs_unlink,
7110 .symlink = nfs_symlink,
7111 .mkdir = nfs_mkdir,
7112 .rmdir = nfs_rmdir,
7113 .mknod = nfs_mknod,
7114 .rename = nfs_rename,
7115 .permission = nfs_permission,
7116 .getattr = nfs_getattr,
7117 .setattr = nfs_setattr,
7118 .getxattr = generic_getxattr,
7119 .setxattr = generic_setxattr,
7120 .listxattr = generic_listxattr,
7121 .removexattr = generic_removexattr,
7122};
7123
92e1d5be 7124static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7125 .permission = nfs_permission,
7126 .getattr = nfs_getattr,
7127 .setattr = nfs_setattr,
64c2ce8b
AK		 7128 .getxattr = generic_getxattr,
7129 .setxattr = generic_setxattr,
7130 .listxattr = generic_listxattr,
7131 .removexattr = generic_removexattr,
6b3b5496
BF		 7132};
7133
509de811 7134const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7135 .version = 4, /* protocol version */
7136 .dentry_ops = &nfs4_dentry_operations,
7137 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7138 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7139 .file_ops = &nfs4_file_operations,
1da177e4 7140 .getroot = nfs4_proc_get_root,
281cad46 7141 .submount = nfs4_submount,
ff9099f2 7142 .try_mount = nfs4_try_mount,
1da177e4
LT		 7143 .getattr = nfs4_proc_getattr,
7144 .setattr = nfs4_proc_setattr,
7145 .lookup = nfs4_proc_lookup,
7146 .access = nfs4_proc_access,
7147 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7148 .create = nfs4_proc_create,
7149 .remove = nfs4_proc_remove,
7150 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7151 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7152 .unlink_done = nfs4_proc_unlink_done,
7153 .rename = nfs4_proc_rename,
d3d4152a 7154 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7155 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7156 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7157 .link = nfs4_proc_link,
7158 .symlink = nfs4_proc_symlink,
7159 .mkdir = nfs4_proc_mkdir,
7160 .rmdir = nfs4_proc_remove,
7161 .readdir = nfs4_proc_readdir,
7162 .mknod = nfs4_proc_mknod,
7163 .statfs = nfs4_proc_statfs,
7164 .fsinfo = nfs4_proc_fsinfo,
7165 .pathconf = nfs4_proc_pathconf,
e9326dca 7166 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7167 .decode_dirent = nfs4_decode_dirent,
7168 .read_setup = nfs4_proc_read_setup,
1abb5088 7169 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7170 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7171 .read_done = nfs4_read_done,
1da177e4 7172 .write_setup = nfs4_proc_write_setup,
57208fa7 7173 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7174 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7175 .write_done = nfs4_write_done,
1da177e4 7176 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7177 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7178 .commit_done = nfs4_commit_done,
1da177e4 7179 .lock = nfs4_proc_lock,
e50a1c2e 7180 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7181 .close_context = nfs4_close_context,
2b484297 7182 .open_context = nfs4_atomic_open,
011e2a7f 7183 .have_delegation = nfs4_have_delegation,
57ec14c5 7184 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7185 .alloc_client = nfs4_alloc_client,
45a52a02 7186 .init_client = nfs4_init_client,
cdb7eced 7187 .free_client = nfs4_free_client,
1179acc6
BS		 7188 .create_server = nfs4_create_server,
7189 .clone_server = nfs_clone_server,
1da177e4
LT		 7190};
7191
64c2ce8b
AK		 7192static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7193 .prefix = XATTR_NAME_NFSV4_ACL,
7194 .list = nfs4_xattr_list_nfs4_acl,
7195 .get = nfs4_xattr_get_nfs4_acl,
7196 .set = nfs4_xattr_set_nfs4_acl,
7197};
7198
7199const struct xattr_handler *nfs4_xattr_handlers[] = {
7200 &nfs4_xattr_nfs4_acl_handler,
7201 NULL
7202};
7203
1da177e4
LT		 7204/*
7205 * Local variables:
7206 * c-basic-offset: 8
7207 * End:
7208 */
Linux 6.x block layer and io_uring tree(s)