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NFSv4.1: Fix layoutcommit error handling
[deliverable/linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
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
ef159e91
TM		 75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
9936781d 83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
f062eb6c 87#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 88static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 90#endif
1da177e4 91/* Prevent leaks of NFSv4 errors into userland */
46f72f57 92static int nfs4_map_errors(int err)
1da177e4 93{
52567b03
TM		 94 if (err >= -1000)
95 return err;
96 switch (err) {
97 case -NFS4ERR_RESOURCE:
98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
52567b03 104 default:
1da177e4 105 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 106 __func__, -err);
52567b03 107 break;
1da177e4 108 }
52567b03 109 return -EIO;
1da177e4
LT		 110}
111
112/*
113 * This is our standard bitmap for GETATTR requests.
114 */
115const u32 nfs4_fattr_bitmap[2] = {
116 FATTR4_WORD0_TYPE
117 | FATTR4_WORD0_CHANGE
118 | FATTR4_WORD0_SIZE
119 | FATTR4_WORD0_FSID
120 | FATTR4_WORD0_FILEID,
121 FATTR4_WORD1_MODE
122 | FATTR4_WORD1_NUMLINKS
123 | FATTR4_WORD1_OWNER
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
130};
131
132const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
139};
140
4ce79717 141const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 142 FATTR4_WORD0_MAXLINK
143 | FATTR4_WORD0_MAXNAME,
144 0
145};
146
dae100c2 147const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
55b6e774 151 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 154};
155
830b8e33
MN		 156const u32 nfs4_fs_locations_bitmap[2] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_SIZE
160 | FATTR4_WORD0_FSID
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
163 FATTR4_WORD1_MODE
164 | FATTR4_WORD1_NUMLINKS
165 | FATTR4_WORD1_OWNER
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
173};
174
bc4785cd 175static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 176 struct nfs4_readdir_arg *readdir)
177{
0dbb4c67 178 __be32 *start, *p;
1da177e4
LT		 179
180 BUG_ON(readdir->count < 80);
181 if (cookie > 2) {
b7ef1956 182 readdir->cookie = cookie;
1da177e4
LT		 183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
184 return;
185 }
186
187 readdir->cookie = 0;
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
189 if (cookie == 2)
190 return;
191
192 /*
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
197 * instead of 1 or 2.
198 */
2b86ce2d 199 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 200
201 if (cookie == 0) {
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
207 p++;
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
4e769b93 211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 212 }
213
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
219 p++;
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
4e769b93 223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 224
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
2b86ce2d 227 kunmap_atomic(start);
1da177e4
LT		 228}
229
65de872e
TM		 230static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231{
232 int res;
233
234 might_sleep();
235
e005e804 236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 237 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 238 return res;
239}
240
241static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
242{
243 int res = 0;
244
245 might_sleep();
246
247 if (*timeout <= 0)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 251 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 252 if (fatal_signal_pending(current))
253 res = -ERESTARTSYS;
254 *timeout <<= 1;
255 return res;
256}
257
258/* This is the error handling routine for processes that are allowed
259 * to sleep.
260 */
b064eca2 261static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 262{
263 struct nfs_client *clp = server->nfs_client;
9e33bed5 264 struct nfs4_state *state = exception->state;
3114ea7a 265 struct inode *inode = exception->inode;
65de872e
TM		 266 int ret = errorcode;
267
268 exception->retry = 0;
269 switch(errorcode) {
270 case 0:
271 return 0;
3114ea7a
TM		 272 case -NFS4ERR_OPENMODE:
273 if (nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
276 return 0;
277 }
278 if (state == NULL)
279 break;
280 nfs4_schedule_stateid_recovery(server, state);
281 goto wait_on_recovery;
a1d0b5ee 282 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 283 case -NFS4ERR_ADMIN_REVOKED:
284 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 285 if (state != NULL)
286 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 287 if (state == NULL)
288 break;
0400a6b0
TM		 289 nfs4_schedule_stateid_recovery(server, state);
290 goto wait_on_recovery;
0ced63d1
TM		 291 case -NFS4ERR_EXPIRED:
292 if (state != NULL)
293 nfs4_schedule_stateid_recovery(server, state);
65de872e 294 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 295 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 296 nfs4_schedule_lease_recovery(clp);
297 goto wait_on_recovery;
03391693 298#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 299 case -NFS4ERR_BADSESSION:
300 case -NFS4ERR_BADSLOT:
301 case -NFS4ERR_BAD_HIGH_SLOT:
302 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
303 case -NFS4ERR_DEADSESSION:
304 case -NFS4ERR_SEQ_FALSE_RETRY:
305 case -NFS4ERR_SEQ_MISORDERED:
306 dprintk("%s ERROR: %d Reset session\n", __func__,
307 errorcode);
0400a6b0 308 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 309 exception->retry = 1;
b9179237 310 break;
03391693 311#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 312 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 313 if (exception->timeout > HZ) {
314 /* We have retried a decent amount, time to
315 * fail
316 */
317 ret = -EBUSY;
318 break;
319 }
65de872e
TM		 320 case -NFS4ERR_GRACE:
321 case -NFS4ERR_DELAY:
2c643488 322 case -EKEYEXPIRED:
65de872e
TM		 323 ret = nfs4_delay(server->client, &exception->timeout);
324 if (ret != 0)
325 break;
a8a4ae3a 326 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 327 case -NFS4ERR_OLD_STATEID:
328 exception->retry = 1;
b064eca2
TM		 329 break;
330 case -NFS4ERR_BADOWNER:
331 /* The following works around a Linux server bug! */
332 case -NFS4ERR_BADNAME:
333 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
334 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
335 exception->retry = 1;
336 printk(KERN_WARNING "NFS: v4 server %s "
337 "does not accept raw "
338 "uid/gids. "
339 "Reenabling the idmapper.\n",
340 server->nfs_client->cl_hostname);
341 }
65de872e
TM		 342 }
343 /* We failed to handle the error */
344 return nfs4_map_errors(ret);
0400a6b0 345wait_on_recovery:
a2c0b9e2
TM		 346 ret = nfs4_wait_clnt_recover(clp);
347 if (ret == 0)
348 exception->retry = 1;
349 return ret;
65de872e
TM		 350}
351
352
452e9352 353static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 354{
1da177e4
LT		 355 spin_lock(&clp->cl_lock);
356 if (time_before(clp->cl_last_renewal,timestamp))
357 clp->cl_last_renewal = timestamp;
358 spin_unlock(&clp->cl_lock);
359}
360
452e9352
TM		 361static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
362{
363 do_renew_lease(server->nfs_client, timestamp);
364}
365
cccef3b9
AA		 366#if defined(CONFIG_NFS_V4_1)
367
e2c4ab3c
AA		 368/*
369 * nfs4_free_slot - free a slot and efficiently update slot table.
370 *
371 * freeing a slot is trivially done by clearing its respective bit
372 * in the bitmap.
373 * If the freed slotid equals highest_used_slotid we want to update it
374 * so that the server would be able to size down the slot table if needed,
375 * otherwise we know that the highest_used_slotid is still in use.
376 * When updating highest_used_slotid there may be "holes" in the bitmap
377 * so we need to scan down from highest_used_slotid to 0 looking for the now
378 * highest slotid in use.
45d43c29 379 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 380 *
381 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 382 */
383static void
45d43c29 384nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 385{
45d43c29 386 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 387 /* clear used bit in bitmap */
388 __clear_bit(slotid, tbl->used_slots);
389
390 /* update highest_used_slotid when it is freed */
391 if (slotid == tbl->highest_used_slotid) {
392 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 393 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 394 tbl->highest_used_slotid = slotid;
395 else
45d43c29 396 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 397 }
45d43c29
TM		 398 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
399 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 400}
401
961a828d
TM		 402bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
403{
404 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
405 return true;
e2c4ab3c
AA		 406}
407
3bfb0fc5 408/*
42acd021 409 * Signal state manager thread if session fore channel is drained
3bfb0fc5 410 */
42acd021 411static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 412{
a2118c33 413 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 414 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
415 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 416 return;
417 }
418
45d43c29 419 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 420 return;
421
42acd021
AA		 422 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
423 complete(&ses->fc_slot_table.complete);
424}
425
426/*
427 * Signal state manager thread if session back channel is drained
428 */
429void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
430{
431 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 432 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 433 return;
434 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
435 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 436}
437
d185a334 438static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 439{
440 struct nfs4_slot_table *tbl;
441
d185a334 442 tbl = &res->sr_session->fc_slot_table;
dfb4f309 443 if (!res->sr_slot) {
13615871
AA		 444 /* just wake up the next guy waiting since
445 * we may have not consumed a slot after all */
691daf3b 446 dprintk("%s: No slot\n", __func__);
35dc1d74 447 return;
13615871 448 }
ea028ac9 449
35dc1d74 450 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 451 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 452 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 453 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 454 res->sr_slot = NULL;
13615871
AA		 455}
456
14516c3a 457static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 458{
459 unsigned long timestamp;
14516c3a 460 struct nfs_client *clp;
b0df806c
AA		 461
462 /*
463 * sr_status remains 1 if an RPC level error occurred. The server
464 * may or may not have processed the sequence operation..
465 * Proceed as if the server received and processed the sequence
466 * operation.
467 */
468 if (res->sr_status == 1)
469 res->sr_status = NFS_OK;
470
468f8613
BS		 471 /* don't increment the sequence number if the task wasn't sent */
472 if (!RPC_WAS_SENT(task))
b0df806c
AA		 473 goto out;
474
691daf3b 475 /* Check the SEQUENCE operation status */
14516c3a
TM		 476 switch (res->sr_status) {
477 case 0:
b0df806c 478 /* Update the slot's sequence and clientid lease timer */
dfb4f309 479 ++res->sr_slot->seq_nr;
b0df806c 480 timestamp = res->sr_renewal_time;
14516c3a 481 clp = res->sr_session->clp;
452e9352 482 do_renew_lease(clp, timestamp);
0629e370 483 /* Check sequence flags */
b4410c2f
TM		 484 if (res->sr_status_flags != 0)
485 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 486 break;
487 case -NFS4ERR_DELAY:
488 /* The server detected a resend of the RPC call and
489 * returned NFS4ERR_DELAY as per Section 2.10.6.2
490 * of RFC5661.
491 */
12364a4f 492 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 493 __func__,
494 res->sr_slot - res->sr_session->fc_slot_table.slots,
495 res->sr_slot->seq_nr);
14516c3a
TM		 496 goto out_retry;
497 default:
498 /* Just update the slot sequence no. */
dfb4f309 499 ++res->sr_slot->seq_nr;
b0df806c
AA		 500 }
501out:
502 /* The session may be reset by one of the error handlers. */
503 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 504 nfs41_sequence_free_slot(res);
14516c3a
TM		 505 return 1;
506out_retry:
d05dd4e9 507 if (!rpc_restart_call(task))
14516c3a
TM		 508 goto out;
509 rpc_delay(task, NFS4_POLL_RETRY_MAX);
510 return 0;
b0df806c
AA		 511}
512
14516c3a
TM		 513static int nfs4_sequence_done(struct rpc_task *task,
514 struct nfs4_sequence_res *res)
df896455 515{
14516c3a
TM		 516 if (res->sr_session == NULL)
517 return 1;
518 return nfs41_sequence_done(task, res);
df896455
TM		 519}
520
510b8175
BH		 521/*
522 * nfs4_find_slot - efficiently look for a free slot
523 *
524 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
525 * If found, we mark the slot as used, update the highest_used_slotid,
526 * and respectively set up the sequence operation args.
45d43c29 527 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 528 *
529 * Note: must be called with under the slot_tbl_lock.
510b8175 530 */
45d43c29 531static u32
40ead580 532nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 533{
45d43c29
TM		 534 u32 slotid;
535 u32 ret_id = NFS4_NO_SLOT;
510b8175 536
45d43c29 537 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 538 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
539 tbl->max_slots);
540 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
541 if (slotid >= tbl->max_slots)
542 goto out;
543 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 544 if (slotid > tbl->highest_used_slotid ||
545 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 546 tbl->highest_used_slotid = slotid;
547 ret_id = slotid;
548out:
549 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
550 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 551 return ret_id;
552}
553
9d12b216
TM		 554static void nfs41_init_sequence(struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res, int cache_reply)
556{
557 args->sa_session = NULL;
558 args->sa_cache_this = 0;
559 if (cache_reply)
560 args->sa_cache_this = 1;
561 res->sr_session = NULL;
562 res->sr_slot = NULL;
563}
564
dc70d7b3 565int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 566 struct nfs4_sequence_args *args,
567 struct nfs4_sequence_res *res,
ce5039c1
AA		 568 struct rpc_task *task)
569{
fbcd4abc
AA		 570 struct nfs4_slot *slot;
571 struct nfs4_slot_table *tbl;
45d43c29 572 u32 slotid;
fbcd4abc
AA		 573
574 dprintk("--> %s\n", __func__);
ce5039c1 575 /* slot already allocated? */
dfb4f309 576 if (res->sr_slot != NULL)
ce5039c1
AA		 577 return 0;
578
fbcd4abc
AA		 579 tbl = &session->fc_slot_table;
580
581 spin_lock(&tbl->slot_tbl_lock);
a2118c33 582 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 583 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 584 /* The state manager will wait until the slot table is empty */
05f0d236 585 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 586 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 587 dprintk("%s session is draining\n", __func__);
05f0d236 588 return -EAGAIN;
b069d94a
AA		 589 }
590
689cf5c1
AB		 591 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
592 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
593 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
594 spin_unlock(&tbl->slot_tbl_lock);
595 dprintk("%s enforce FIFO order\n", __func__);
596 return -EAGAIN;
597 }
598
40ead580 599 slotid = nfs4_find_slot(tbl);
45d43c29 600 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 601 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
602 spin_unlock(&tbl->slot_tbl_lock);
603 dprintk("<-- %s: no free slots\n", __func__);
604 return -EAGAIN;
605 }
606 spin_unlock(&tbl->slot_tbl_lock);
607
689cf5c1 608 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 609 slot = tbl->slots + slotid;
99fe60d0 610 args->sa_session = session;
fbcd4abc 611 args->sa_slotid = slotid;
fbcd4abc
AA		 612
613 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
614
99fe60d0 615 res->sr_session = session;
dfb4f309 616 res->sr_slot = slot;
fbcd4abc 617 res->sr_renewal_time = jiffies;
2a6e26cd 618 res->sr_status_flags = 0;
fbcd4abc
AA		 619 /*
620 * sr_status is only set in decode_sequence, and so will remain
621 * set to 1 if an rpc level failure occurs.
622 */
623 res->sr_status = 1;
ce5039c1
AA		 624 return 0;
625}
dc70d7b3 626EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 627
035168ab 628int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
ce5039c1
AA		 631 struct rpc_task *task)
632{
035168ab 633 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 634 int ret = 0;
635
9d12b216 636 if (session == NULL)
035168ab 637 goto out;
035168ab 638
12364a4f 639 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 640 __func__, session->clp, session, res->sr_slot ?
641 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 642
9d12b216 643 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 644out:
645 dprintk("<-- %s status=%d\n", __func__, ret);
646 return ret;
647}
648
649struct nfs41_call_sync_data {
035168ab 650 const struct nfs_server *seq_server;
ce5039c1
AA		 651 struct nfs4_sequence_args *seq_args;
652 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 653};
654
655static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
035168ab
TM		 659 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
660
661 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 662 data->seq_res, task))
ce5039c1
AA		 663 return;
664 rpc_call_start(task);
665}
666
b257957e
AB		 667static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
668{
669 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
670 nfs41_call_sync_prepare(task, calldata);
671}
672
69ab40c4
AA		 673static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
674{
675 struct nfs41_call_sync_data *data = calldata;
676
14516c3a 677 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 678}
679
17280175 680static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 681 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 682 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 683};
684
17280175 685static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 686 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
687 .rpc_call_done = nfs41_call_sync_done,
688};
689
7c513058
BS		 690static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
691 struct nfs_server *server,
ce5039c1
AA		 692 struct rpc_message *msg,
693 struct nfs4_sequence_args *args,
694 struct nfs4_sequence_res *res,
b257957e 695 int privileged)
ce5039c1
AA		 696{
697 int ret;
698 struct rpc_task *task;
699 struct nfs41_call_sync_data data = {
035168ab 700 .seq_server = server,
ce5039c1
AA		 701 .seq_args = args,
702 .seq_res = res,
ce5039c1
AA		 703 };
704 struct rpc_task_setup task_setup = {
7c513058 705 .rpc_client = clnt,
ce5039c1
AA		 706 .rpc_message = msg,
707 .callback_ops = &nfs41_call_sync_ops,
708 .callback_data = &data
709 };
710
b257957e
AB		 711 if (privileged)
712 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 713 task = rpc_run_task(&task_setup);
714 if (IS_ERR(task))
715 ret = PTR_ERR(task);
716 else {
717 ret = task->tk_status;
718 rpc_put_task(task);
719 }
720 return ret;
721}
722
7c513058
BS		 723int _nfs4_call_sync_session(struct rpc_clnt *clnt,
724 struct nfs_server *server,
cccef3b9
AA		 725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res,
728 int cache_reply)
729{
9d12b216
TM		 730 nfs41_init_sequence(args, res, cache_reply);
731 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 732}
733
df896455 734#else
9d12b216
TM		 735static inline
736void nfs41_init_sequence(struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res, int cache_reply)
738{
739}
740
14516c3a
TM		 741static int nfs4_sequence_done(struct rpc_task *task,
742 struct nfs4_sequence_res *res)
df896455 743{
14516c3a 744 return 1;
df896455 745}
cccef3b9
AA		 746#endif /* CONFIG_NFS_V4_1 */
747
7c513058
BS		 748int _nfs4_call_sync(struct rpc_clnt *clnt,
749 struct nfs_server *server,
cccef3b9
AA		 750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
753 int cache_reply)
754{
9d12b216 755 nfs41_init_sequence(args, res, cache_reply);
7c513058 756 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 757}
758
e73b83f2 759static inline
7c513058
BS		 760int nfs4_call_sync(struct rpc_clnt *clnt,
761 struct nfs_server *server,
e73b83f2
BS		 762 struct rpc_message *msg,
763 struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res,
765 int cache_reply)
766{
7c513058
BS		 767 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
768 args, res, cache_reply);
e73b83f2 769}
cccef3b9 770
38478b24 771static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 772{
38478b24 773 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 774
38478b24 775 spin_lock(&dir->i_lock);
40d24704 776 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
a9a4a87a 777 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 778 nfs_force_lookup_revalidate(dir);
a9a4a87a 779 dir->i_version = cinfo->after;
38478b24 780 spin_unlock(&dir->i_lock);
1da177e4
LT		 781}
782
e56e0b78 783struct nfs4_opendata {
c6d00e63 784 struct kref kref;
e56e0b78
TM		 785 struct nfs_openargs o_arg;
786 struct nfs_openres o_res;
cdd4e68b
TM		 787 struct nfs_open_confirmargs c_arg;
788 struct nfs_open_confirmres c_res;
6926afd1
TM		 789 struct nfs4_string owner_name;
790 struct nfs4_string group_name;
e56e0b78
TM		 791 struct nfs_fattr f_attr;
792 struct nfs_fattr dir_attr;
e56e0b78 793 struct dentry *dir;
82a2c1b7 794 struct dentry *dentry;
e56e0b78 795 struct nfs4_state_owner *owner;
aac00a8d 796 struct nfs4_state *state;
e56e0b78 797 struct iattr attrs;
26e976a8 798 unsigned long timestamp;
3e309914 799 unsigned int rpc_done : 1;
24ac23ab
TM		 800 int rpc_status;
801 int cancelled;
e56e0b78
TM		 802};
803
2ced46c2
TM		 804
805static void nfs4_init_opendata_res(struct nfs4_opendata *p)
806{
807 p->o_res.f_attr = &p->f_attr;
808 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 811 p->o_res.server = p->o_arg.server;
812 nfs_fattr_init(&p->f_attr);
813 nfs_fattr_init(&p->dir_attr);
6926afd1 814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 815}
816
82a2c1b7 817static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 819 const struct iattr *attrs,
820 gfp_t gfp_mask)
e56e0b78 821{
82a2c1b7 822 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 823 struct inode *dir = parent->d_inode;
824 struct nfs_server *server = NFS_SERVER(dir);
825 struct nfs4_opendata *p;
826
8535b2be 827 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 828 if (p == NULL)
829 goto err;
8535b2be 830 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 831 if (p->o_arg.seqid == NULL)
832 goto err_free;
82a2c1b7
AV		 833 nfs_sb_active(dentry->d_sb);
834 p->dentry = dget(dentry);
e56e0b78
TM		 835 p->dir = parent;
836 p->owner = sp;
837 atomic_inc(&sp->so_count);
838 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 841 p->o_arg.clientid = server->nfs_client->cl_clientid;
48c22eb2 842 p->o_arg.id = sp->so_seqid.owner_id;
82a2c1b7 843 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 844 p->o_arg.server = server;
845 p->o_arg.bitmask = server->attr_bitmask;
6926afd1 846 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
e56e0b78 847 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 848 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 849 __be32 verf[2];
d77d76ff 850
e56e0b78
TM		 851 p->o_arg.u.attrs = &p->attrs;
852 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 853
854 verf[0] = jiffies;
855 verf[1] = current->pid;
856 memcpy(p->o_arg.u.verifier.data, verf,
857 sizeof(p->o_arg.u.verifier.data));
e56e0b78 858 }
cdd4e68b
TM		 859 p->c_arg.fh = &p->o_res.fh;
860 p->c_arg.stateid = &p->o_res.stateid;
861 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 862 nfs4_init_opendata_res(p);
c6d00e63 863 kref_init(&p->kref);
e56e0b78
TM		 864 return p;
865err_free:
866 kfree(p);
867err:
868 dput(parent);
869 return NULL;
870}
871
c6d00e63 872static void nfs4_opendata_free(struct kref *kref)
e56e0b78 873{
c6d00e63
TM		 874 struct nfs4_opendata *p = container_of(kref,
875 struct nfs4_opendata, kref);
82a2c1b7 876 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 877
878 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 879 if (p->state != NULL)
880 nfs4_put_open_state(p->state);
c6d00e63
TM		 881 nfs4_put_state_owner(p->owner);
882 dput(p->dir);
82a2c1b7
AV		 883 dput(p->dentry);
884 nfs_sb_deactive(sb);
6926afd1 885 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 886 kfree(p);
887}
888
889static void nfs4_opendata_put(struct nfs4_opendata *p)
890{
891 if (p != NULL)
892 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 893}
894
06f814a3
TM		 895static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
896{
06f814a3
TM		 897 int ret;
898
06f814a3 899 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 900 return ret;
901}
902
dc0b027d 903static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 904{
905 int ret = 0;
dc0b027d 906
536e43d1 907 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 908 goto out;
909 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 910 case FMODE_READ:
88069f77
TM		 911 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
912 && state->n_rdonly != 0;
6ee41268
TM		 913 break;
914 case FMODE_WRITE:
88069f77
TM		 915 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
916 && state->n_wronly != 0;
6ee41268
TM		 917 break;
918 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 919 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
920 && state->n_rdwr != 0;
6ee41268 921 }
dc0b027d 922out:
6ee41268
TM		 923 return ret;
924}
925
dc0b027d 926static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 927{
652f89f6
TM		 928 if (delegation == NULL)
929 return 0;
dc0b027d 930 if ((delegation->type & fmode) != fmode)
aac00a8d 931 return 0;
15c831bf 932 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 933 return 0;
b7391f44 934 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 935 return 1;
936}
937
dc0b027d 938static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 939{
dc0b027d 940 switch (fmode) {
e7616923
TM		 941 case FMODE_WRITE:
942 state->n_wronly++;
943 break;
944 case FMODE_READ:
945 state->n_rdonly++;
946 break;
947 case FMODE_READ|FMODE_WRITE:
948 state->n_rdwr++;
949 }
dc0b027d 950 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 951}
952
dc0b027d 953static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 954{
955 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 956 nfs4_stateid_copy(&state->stateid, stateid);
957 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 958 switch (fmode) {
003707c7
TM		 959 case FMODE_READ:
960 set_bit(NFS_O_RDONLY_STATE, &state->flags);
961 break;
962 case FMODE_WRITE:
963 set_bit(NFS_O_WRONLY_STATE, &state->flags);
964 break;
965 case FMODE_READ|FMODE_WRITE:
966 set_bit(NFS_O_RDWR_STATE, &state->flags);
967 }
e7616923
TM		 968}
969
dc0b027d 970static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 971{
8bda4e4c 972 write_seqlock(&state->seqlock);
dc0b027d 973 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 974 write_sequnlock(&state->seqlock);
003707c7
TM		 975}
976
dc0b027d 977static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 978{
8bda4e4c
TM		 979 /*
980 * Protect the call to nfs4_state_set_mode_locked and
981 * serialise the stateid update
982 */
983 write_seqlock(&state->seqlock);
003707c7 984 if (deleg_stateid != NULL) {
f597c537 985 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 986 set_bit(NFS_DELEGATED_STATE, &state->flags);
987 }
988 if (open_stateid != NULL)
dc0b027d 989 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 990 write_sequnlock(&state->seqlock);
991 spin_lock(&state->owner->so_lock);
dc0b027d 992 update_open_stateflags(state, fmode);
ec073428 993 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 994}
995
dc0b027d 996static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 997{
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_delegation *deleg_cur;
1000 int ret = 0;
1001
dc0b027d 1002 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1003
1004 rcu_read_lock();
1005 deleg_cur = rcu_dereference(nfsi->delegation);
1006 if (deleg_cur == NULL)
1007 goto no_delegation;
1008
1009 spin_lock(&deleg_cur->lock);
1010 if (nfsi->delegation != deleg_cur ||
dc0b027d 1011 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1012 goto no_delegation_unlock;
1013
1014 if (delegation == NULL)
1015 delegation = &deleg_cur->stateid;
f597c537 1016 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1017 goto no_delegation_unlock;
1018
b7391f44 1019 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1020 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1021 ret = 1;
1022no_delegation_unlock:
1023 spin_unlock(&deleg_cur->lock);
1024no_delegation:
1025 rcu_read_unlock();
1026
1027 if (!ret && open_stateid != NULL) {
dc0b027d 1028 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1029 ret = 1;
1030 }
1031
1032 return ret;
1033}
1034
1035
dc0b027d 1036static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1037{
1038 struct nfs_delegation *delegation;
1039
1040 rcu_read_lock();
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1042 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1043 rcu_read_unlock();
1044 return;
1045 }
1046 rcu_read_unlock();
1047 nfs_inode_return_delegation(inode);
1048}
1049
6ee41268 1050static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1051{
1052 struct nfs4_state *state = opendata->state;
1053 struct nfs_inode *nfsi = NFS_I(state->inode);
1054 struct nfs_delegation *delegation;
536e43d1 1055 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1056 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1057 nfs4_stateid stateid;
1058 int ret = -EAGAIN;
1059
aac00a8d 1060 for (;;) {
dc0b027d 1061 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1062 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1063 if (can_open_cached(state, fmode, open_mode)) {
1064 update_open_stateflags(state, fmode);
6ee41268 1065 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1066 goto out_return_state;
1067 }
1068 spin_unlock(&state->owner->so_lock);
1069 }
34310430
TM		 1070 rcu_read_lock();
1071 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1072 if (!can_open_delegated(delegation, fmode)) {
34310430 1073 rcu_read_unlock();
aac00a8d 1074 break;
34310430 1075 }
aac00a8d 1076 /* Save the delegation */
f597c537 1077 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1078 rcu_read_unlock();
af22f94a 1079 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1080 if (ret != 0)
1081 goto out;
1082 ret = -EAGAIN;
34310430
TM		 1083
1084 /* Try to update the stateid using the delegation */
dc0b027d 1085 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1086 goto out_return_state;
aac00a8d 1087 }
aac00a8d
TM		 1088out:
1089 return ERR_PTR(ret);
1090out_return_state:
1091 atomic_inc(&state->count);
1092 return state;
1093}
1094
24ac23ab
TM		 1095static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1096{
1097 struct inode *inode;
1098 struct nfs4_state *state = NULL;
003707c7 1099 struct nfs_delegation *delegation;
1b370bc2 1100 int ret;
24ac23ab 1101
aac00a8d 1102 if (!data->rpc_done) {
6ee41268 1103 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1104 goto out;
1105 }
1106
1b370bc2 1107 ret = -EAGAIN;
24ac23ab 1108 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1109 goto err;
24ac23ab 1110 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1111 ret = PTR_ERR(inode);
03f28e3a 1112 if (IS_ERR(inode))
1b370bc2
TM		 1113 goto err;
1114 ret = -ENOMEM;
24ac23ab
TM		 1115 state = nfs4_get_open_state(inode, data->owner);
1116 if (state == NULL)
1b370bc2 1117 goto err_put_inode;
549d6ed5 1118 if (data->o_res.delegation_type != 0) {
4e0038b6 1119 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1120 int delegation_flags = 0;
1121
003707c7
TM		 1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
652f89f6
TM		 1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1131 clp->cl_hostname);
652f89f6 1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140 }
34310430
TM		 1141
1142 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1143 data->o_arg.fmode);
24ac23ab 1144 iput(inode);
aac00a8d 1145out:
24ac23ab 1146 return state;
1b370bc2
TM		 1147err_put_inode:
1148 iput(inode);
1149err:
1150 return ERR_PTR(ret);
24ac23ab
TM		 1151}
1152
864472e9
TM		 1153static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1154{
1155 struct nfs_inode *nfsi = NFS_I(state->inode);
1156 struct nfs_open_context *ctx;
1157
1158 spin_lock(&state->inode->i_lock);
1159 list_for_each_entry(ctx, &nfsi->open_files, list) {
1160 if (ctx->state != state)
1161 continue;
1162 get_nfs_open_context(ctx);
1163 spin_unlock(&state->inode->i_lock);
1164 return ctx;
1165 }
1166 spin_unlock(&state->inode->i_lock);
1167 return ERR_PTR(-ENOENT);
1168}
1169
6f220ed5
TM		 1170static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1171{
1172 struct nfs4_opendata *opendata;
1173
3d4ff43d 1174 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1175 if (opendata == NULL)
1176 return ERR_PTR(-ENOMEM);
1177 opendata->state = state;
1178 atomic_inc(&state->count);
1179 return opendata;
1180}
1181
dc0b027d 1182static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1183{
2ced46c2 1184 struct nfs4_state *newstate;
864472e9
TM		 1185 int ret;
1186
dc0b027d
TM		 1187 opendata->o_arg.open_flags = 0;
1188 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1189 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1190 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1191 nfs4_init_opendata_res(opendata);
b257957e 1192 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1193 if (ret != 0)
1194 return ret;
2ced46c2 1195 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1196 if (IS_ERR(newstate))
1197 return PTR_ERR(newstate);
643168c2 1198 nfs4_close_state(newstate, fmode);
2ced46c2 1199 *res = newstate;
864472e9
TM		 1200 return 0;
1201}
1202
1203static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1204{
864472e9 1205 struct nfs4_state *newstate;
864472e9
TM		 1206 int ret;
1207
1208 /* memory barrier prior to reading state->n_* */
2ced46c2 1209 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1210 smp_rmb();
1211 if (state->n_rdwr != 0) {
b0ed9dbc 1212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1214 if (ret != 0)
1215 return ret;
2ced46c2
TM		 1216 if (newstate != state)
1217 return -ESTALE;
864472e9
TM		 1218 }
1219 if (state->n_wronly != 0) {
b0ed9dbc 1220 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1221 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1222 if (ret != 0)
1223 return ret;
2ced46c2
TM		 1224 if (newstate != state)
1225 return -ESTALE;
864472e9
TM		 1226 }
1227 if (state->n_rdonly != 0) {
b0ed9dbc 1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1229 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1230 if (ret != 0)
1231 return ret;
2ced46c2
TM		 1232 if (newstate != state)
1233 return -ESTALE;
864472e9 1234 }
1ac7e2fd
TM		 1235 /*
1236 * We may have performed cached opens for all three recoveries.
1237 * Check if we need to update the current stateid.
1238 */
1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1240 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1241 write_seqlock(&state->seqlock);
1ac7e2fd 1242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1243 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1244 write_sequnlock(&state->seqlock);
1ac7e2fd 1245 }
864472e9
TM		 1246 return 0;
1247}
1248
1da177e4
LT		 1249/*
1250 * OPEN_RECLAIM:
1251 * reclaim state on the server after a reboot.
1da177e4 1252 */
539cd03a 1253static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1254{
1ac7e2fd 1255 struct nfs_delegation *delegation;
864472e9 1256 struct nfs4_opendata *opendata;
dc0b027d 1257 fmode_t delegation_type = 0;
1da177e4
LT		 1258 int status;
1259
6f220ed5
TM		 1260 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1261 if (IS_ERR(opendata))
1262 return PTR_ERR(opendata);
864472e9
TM		 1263 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1264 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1265 rcu_read_lock();
1266 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1267 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1268 delegation_type = delegation->type;
1ac7e2fd 1269 rcu_read_unlock();
864472e9
TM		 1270 opendata->o_arg.u.delegation_type = delegation_type;
1271 status = nfs4_open_recover(opendata, state);
c6d00e63 1272 nfs4_opendata_put(opendata);
1da177e4
LT		 1273 return status;
1274}
1275
539cd03a 1276static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1277{
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1279 struct nfs4_exception exception = { };
1280 int err;
1281 do {
539cd03a 1282 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1283 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1284 break;
1285 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1286 } while (exception.retry);
1287 return err;
1288}
1289
864472e9
TM		 1290static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1291{
1292 struct nfs_open_context *ctx;
1293 int ret;
1294
1295 ctx = nfs4_state_find_open_context(state);
1296 if (IS_ERR(ctx))
1297 return PTR_ERR(ctx);
539cd03a 1298 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1299 put_nfs_open_context(ctx);
1300 return ret;
1301}
1302
13437e12 1303static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1304{
e56e0b78 1305 struct nfs4_opendata *opendata;
864472e9 1306 int ret;
1da177e4 1307
6f220ed5
TM		 1308 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1309 if (IS_ERR(opendata))
1310 return PTR_ERR(opendata);
e56e0b78 1311 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1312 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1313 ret = nfs4_open_recover(opendata, state);
c6d00e63 1314 nfs4_opendata_put(opendata);
864472e9 1315 return ret;
1da177e4
LT		 1316}
1317
13437e12 1318int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1319{
1320 struct nfs4_exception exception = { };
539cd03a 1321 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1322 int err;
1323 do {
13437e12 1324 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1325 switch (err) {
1326 case 0:
965b5d67
TM		 1327 case -ENOENT:
1328 case -ESTALE:
1329 goto out;
bcfa49f6
RL		 1330 case -NFS4ERR_BADSESSION:
1331 case -NFS4ERR_BADSLOT:
1332 case -NFS4ERR_BAD_HIGH_SLOT:
1333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1334 case -NFS4ERR_DEADSESSION:
0400a6b0 1335 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1336 goto out;
1da177e4
LT		 1337 case -NFS4ERR_STALE_CLIENTID:
1338 case -NFS4ERR_STALE_STATEID:
1339 case -NFS4ERR_EXPIRED:
1340 /* Don't recall a delegation if it was lost */
0400a6b0 1341 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1342 goto out;
1343 case -ERESTARTSYS:
1344 /*
1345 * The show must go on: exit, but mark the
1346 * stateid as needing recovery.
1347 */
a1d0b5ee 1348 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1349 case -NFS4ERR_ADMIN_REVOKED:
1350 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1351 nfs_inode_find_state_and_recover(state->inode,
1352 stateid);
0400a6b0 1353 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1354 case -EKEYEXPIRED:
1355 /*
1356 * User RPCSEC_GSS context has expired.
1357 * We cannot recover this stateid now, so
1358 * skip it and allow recovery thread to
1359 * proceed.
1360 */
965b5d67
TM		 1361 case -ENOMEM:
1362 err = 0;
1363 goto out;
1da177e4
LT		 1364 }
1365 err = nfs4_handle_exception(server, err, &exception);
1366 } while (exception.retry);
965b5d67 1367out:
1da177e4
LT		 1368 return err;
1369}
1370
cdd4e68b
TM		 1371static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1372{
1373 struct nfs4_opendata *data = calldata;
1374
1375 data->rpc_status = task->tk_status;
26e976a8 1376 if (data->rpc_status == 0) {
f597c537 1377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1378 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1379 renew_lease(data->o_res.server, data->timestamp);
3e309914 1380 data->rpc_done = 1;
26e976a8 1381 }
cdd4e68b
TM		 1382}
1383
1384static void nfs4_open_confirm_release(void *calldata)
1385{
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1388
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1391 goto out_free;
1392 /* In case of error, no cleanup! */
3e309914 1393 if (!data->rpc_done)
cdd4e68b 1394 goto out_free;
cdd4e68b 1395 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1396 if (!IS_ERR(state))
643168c2 1397 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1398out_free:
c6d00e63 1399 nfs4_opendata_put(data);
cdd4e68b
TM		 1400}
1401
1402static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1403 .rpc_call_done = nfs4_open_confirm_done,
1404 .rpc_release = nfs4_open_confirm_release,
1405};
1406
1407/*
1408 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1409 */
1410static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1411{
1412 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1413 struct rpc_task *task;
5138fde0
TM		 1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1416 .rpc_argp = &data->c_arg,
1417 .rpc_resp = &data->c_res,
1418 .rpc_cred = data->owner->so_cred,
1419 };
c970aa85
TM		 1420 struct rpc_task_setup task_setup_data = {
1421 .rpc_client = server->client,
5138fde0 1422 .rpc_message = &msg,
c970aa85
TM		 1423 .callback_ops = &nfs4_open_confirm_ops,
1424 .callback_data = data,
101070ca 1425 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1426 .flags = RPC_TASK_ASYNC,
1427 };
1da177e4
LT		 1428 int status;
1429
c6d00e63 1430 kref_get(&data->kref);
3e309914
TM		 1431 data->rpc_done = 0;
1432 data->rpc_status = 0;
5138fde0 1433 data->timestamp = jiffies;
c970aa85 1434 task = rpc_run_task(&task_setup_data);
7a1218a2 1435 if (IS_ERR(task))
cdd4e68b 1436 return PTR_ERR(task);
cdd4e68b
TM		 1437 status = nfs4_wait_for_completion_rpc_task(task);
1438 if (status != 0) {
1439 data->cancelled = 1;
1440 smp_wmb();
1441 } else
1442 status = data->rpc_status;
e6b3c4db 1443 rpc_put_task(task);
1da177e4
LT		 1444 return status;
1445}
1446
24ac23ab 1447static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1448{
24ac23ab
TM		 1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state_owner *sp = data->owner;
5138fde0 1451
24ac23ab
TM		 1452 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 return;
aac00a8d
TM		 1454 /*
1455 * Check if we still need to send an OPEN call, or if we can use
1456 * a delegation instead.
1457 */
1458 if (data->state != NULL) {
1459 struct nfs_delegation *delegation;
1460
dc0b027d 1461 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1462 goto out_no_action;
aac00a8d
TM		 1463 rcu_read_lock();
1464 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1465 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1466 can_open_delegated(delegation, data->o_arg.fmode))
1467 goto unlock_no_action;
aac00a8d
TM		 1468 rcu_read_unlock();
1469 }
24ac23ab 1470 /* Update sequence id. */
48c22eb2 1471 data->o_arg.id = sp->so_seqid.owner_id;
1f0e890d 1472 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1473 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1474 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1475 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1476 }
26e976a8 1477 data->timestamp = jiffies;
035168ab 1478 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1479 &data->o_arg.seq_args,
9d12b216 1480 &data->o_res.seq_res, task))
d898528c 1481 return;
5138fde0 1482 rpc_call_start(task);
6ee41268 1483 return;
652f89f6
TM		 1484unlock_no_action:
1485 rcu_read_unlock();
6ee41268
TM		 1486out_no_action:
1487 task->tk_action = NULL;
1488
24ac23ab 1489}
1da177e4 1490
b257957e
AB		 1491static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1492{
1493 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1494 nfs4_open_prepare(task, calldata);
1495}
1496
24ac23ab
TM		 1497static void nfs4_open_done(struct rpc_task *task, void *calldata)
1498{
1499 struct nfs4_opendata *data = calldata;
1da177e4 1500
24ac23ab 1501 data->rpc_status = task->tk_status;
d898528c 1502
14516c3a
TM		 1503 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1504 return;
d898528c 1505
24ac23ab
TM		 1506 if (task->tk_status == 0) {
1507 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1508 case S_IFREG:
1509 break;
1510 case S_IFLNK:
24ac23ab 1511 data->rpc_status = -ELOOP;
6f926b5b
TM		 1512 break;
1513 case S_IFDIR:
24ac23ab 1514 data->rpc_status = -EISDIR;
6f926b5b
TM		 1515 break;
1516 default:
24ac23ab 1517 data->rpc_status = -ENOTDIR;
6f926b5b 1518 }
26e976a8 1519 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1520 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1521 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1522 }
3e309914 1523 data->rpc_done = 1;
24ac23ab 1524}
6f926b5b 1525
24ac23ab
TM		 1526static void nfs4_open_release(void *calldata)
1527{
1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state *state = NULL;
1530
1531 /* If this request hasn't been cancelled, do nothing */
1532 if (data->cancelled == 0)
1533 goto out_free;
1534 /* In case of error, no cleanup! */
3e309914 1535 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1536 goto out_free;
1537 /* In case we need an open_confirm, no cleanup! */
1538 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1539 goto out_free;
24ac23ab 1540 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1541 if (!IS_ERR(state))
643168c2 1542 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1543out_free:
c6d00e63 1544 nfs4_opendata_put(data);
24ac23ab
TM		 1545}
1546
1547static const struct rpc_call_ops nfs4_open_ops = {
1548 .rpc_call_prepare = nfs4_open_prepare,
1549 .rpc_call_done = nfs4_open_done,
1550 .rpc_release = nfs4_open_release,
1551};
1552
b257957e
AB		 1553static const struct rpc_call_ops nfs4_recover_open_ops = {
1554 .rpc_call_prepare = nfs4_recover_open_prepare,
1555 .rpc_call_done = nfs4_open_done,
1556 .rpc_release = nfs4_open_release,
1557};
1558
1559static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1560{
1561 struct inode *dir = data->dir->d_inode;
1562 struct nfs_server *server = NFS_SERVER(dir);
1563 struct nfs_openargs *o_arg = &data->o_arg;
1564 struct nfs_openres *o_res = &data->o_res;
1565 struct rpc_task *task;
5138fde0
TM		 1566 struct rpc_message msg = {
1567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1568 .rpc_argp = o_arg,
1569 .rpc_resp = o_res,
1570 .rpc_cred = data->owner->so_cred,
1571 };
c970aa85
TM		 1572 struct rpc_task_setup task_setup_data = {
1573 .rpc_client = server->client,
5138fde0 1574 .rpc_message = &msg,
c970aa85
TM		 1575 .callback_ops = &nfs4_open_ops,
1576 .callback_data = data,
101070ca 1577 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1578 .flags = RPC_TASK_ASYNC,
1579 };
24ac23ab
TM		 1580 int status;
1581
9d12b216 1582 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1583 kref_get(&data->kref);
3e309914
TM		 1584 data->rpc_done = 0;
1585 data->rpc_status = 0;
2ced46c2 1586 data->cancelled = 0;
b257957e
AB		 1587 if (isrecover)
1588 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1589 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1590 if (IS_ERR(task))
1591 return PTR_ERR(task);
1592 status = nfs4_wait_for_completion_rpc_task(task);
1593 if (status != 0) {
1594 data->cancelled = 1;
1595 smp_wmb();
1596 } else
1597 status = data->rpc_status;
1598 rpc_put_task(task);
1599
1600 return status;
1601}
1602
1603static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1604{
1605 struct inode *dir = data->dir->d_inode;
1606 struct nfs_openres *o_res = &data->o_res;
1607 int status;
1608
1609 status = nfs4_run_open_task(data, 1);
1610 if (status != 0 || !data->rpc_done)
1611 return status;
1612
6926afd1
TM		 1613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1614
b257957e
AB		 1615 nfs_refresh_inode(dir, o_res->dir_attr);
1616
1617 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1618 status = _nfs4_proc_open_confirm(data);
1619 if (status != 0)
1620 return status;
1621 }
1622
1623 return status;
1624}
1625
1626/*
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1628 */
1629static int _nfs4_proc_open(struct nfs4_opendata *data)
1630{
1631 struct inode *dir = data->dir->d_inode;
1632 struct nfs_server *server = NFS_SERVER(dir);
1633 struct nfs_openargs *o_arg = &data->o_arg;
1634 struct nfs_openres *o_res = &data->o_res;
1635 int status;
1636
1637 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1638 if (!data->rpc_done)
1639 return status;
1640 if (status != 0) {
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1643 return -ENOENT;
24ac23ab 1644 return status;
08ef7bd3 1645 }
24ac23ab 1646
6926afd1
TM		 1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
1648
56ae19f3
TM		 1649 if (o_arg->open_flags & O_CREAT) {
1650 update_changeattr(dir, &o_res->cinfo);
1651 nfs_post_op_update_inode(dir, o_res->dir_attr);
1652 } else
1653 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1654 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1655 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1656 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1657 status = _nfs4_proc_open_confirm(data);
1da177e4 1658 if (status != 0)
24ac23ab 1659 return status;
1da177e4
LT		 1660 }
1661 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1662 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1663 return 0;
1da177e4
LT		 1664}
1665
d83217c1 1666static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1667{
a78cb57a 1668 unsigned int loop;
6b30954e 1669 int ret;
58d9714a 1670
a78cb57a 1671 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1672 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1673 if (ret != 0)
a78cb57a 1674 break;
e598d843
TM		 1675 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1676 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1677 break;
0400a6b0 1678 nfs4_schedule_state_manager(clp);
a78cb57a 1679 ret = -EIO;
6b30954e 1680 }
a78cb57a 1681 return ret;
58d9714a
TM		 1682}
1683
d83217c1
AA		 1684static int nfs4_recover_expired_lease(struct nfs_server *server)
1685{
1686 return nfs4_client_recover_expired_lease(server->nfs_client);
1687}
1688
1da177e4
LT		 1689/*
1690 * OPEN_EXPIRED:
1691 * reclaim state on the server after a network partition.
1692 * Assumes caller holds the appropriate lock
1693 */
539cd03a 1694static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1695{
e56e0b78 1696 struct nfs4_opendata *opendata;
864472e9 1697 int ret;
1da177e4 1698
6f220ed5
TM		 1699 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1700 if (IS_ERR(opendata))
1701 return PTR_ERR(opendata);
864472e9 1702 ret = nfs4_open_recover(opendata, state);
35d05778 1703 if (ret == -ESTALE)
3d4ff43d 1704 d_drop(ctx->dentry);
c6d00e63 1705 nfs4_opendata_put(opendata);
864472e9 1706 return ret;
1da177e4
LT		 1707}
1708
a9ed2e25 1709static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1710{
539cd03a 1711 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1712 struct nfs4_exception exception = { };
1713 int err;
1714
1715 do {
539cd03a 1716 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1717 switch (err) {
1718 default:
1719 goto out;
1720 case -NFS4ERR_GRACE:
1721 case -NFS4ERR_DELAY:
1722 nfs4_handle_exception(server, err, &exception);
1723 err = 0;
1724 }
202b50dc 1725 } while (exception.retry);
a9ed2e25 1726out:
202b50dc
TM		 1727 return err;
1728}
1729
1da177e4
LT		 1730static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1731{
1da177e4 1732 struct nfs_open_context *ctx;
864472e9 1733 int ret;
1da177e4 1734
864472e9
TM		 1735 ctx = nfs4_state_find_open_context(state);
1736 if (IS_ERR(ctx))
1737 return PTR_ERR(ctx);
539cd03a 1738 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1739 put_nfs_open_context(ctx);
1740 return ret;
1da177e4
LT		 1741}
1742
f062eb6c 1743#if defined(CONFIG_NFS_V4_1)
b01dd1d8 1744static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
f062eb6c 1745{
b01dd1d8 1746 int status = NFS_OK;
f062eb6c
BS		 1747 struct nfs_server *server = NFS_SERVER(state->inode);
1748
b01dd1d8
BS		 1749 if (state->flags & flags) {
1750 status = nfs41_test_stateid(server, stateid);
1751 if (status != NFS_OK) {
1752 nfs41_free_stateid(server, stateid);
1753 state->flags &= ~flags;
1754 }
1755 }
1756 return status;
1757}
1758
1759static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1760{
1761 int deleg_status, open_status;
1762 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1763 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1764
1765 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1766 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1767
1768 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1769 return NFS_OK;
f062eb6c
BS		 1770 return nfs4_open_expired(sp, state);
1771}
1772#endif
1773
aa53ed54
JL		 1774/*
1775 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1776 * fields corresponding to attributes that were used to store the verifier.
1777 * Make sure we clobber those fields in the later setattr call
1778 */
1779static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1780{
1781 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1782 !(sattr->ia_valid & ATTR_ATIME_SET))
1783 sattr->ia_valid |= ATTR_ATIME;
1784
1785 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1786 !(sattr->ia_valid & ATTR_MTIME_SET))
1787 sattr->ia_valid |= ATTR_MTIME;
1788}
1789
1da177e4 1790/*
24ac23ab 1791 * Returns a referenced nfs4_state
1da177e4 1792 */
82a2c1b7 1793static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1794{
1795 struct nfs4_state_owner *sp;
1796 struct nfs4_state *state = NULL;
1797 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1798 struct nfs4_opendata *opendata;
aac00a8d 1799 int status;
1da177e4
LT		 1800
1801 /* Protect against reboot recovery conflicts */
1da177e4 1802 status = -ENOMEM;
d1e284d5
TM		 1803 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1804 if (sp == NULL) {
1da177e4
LT		 1805 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1806 goto out_err;
1807 }
58d9714a
TM		 1808 status = nfs4_recover_expired_lease(server);
1809 if (status != 0)
b4454fe1 1810 goto err_put_state_owner;
82a2c1b7
AV		 1811 if (dentry->d_inode != NULL)
1812 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1813 status = -ENOMEM;
82a2c1b7 1814 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1815 if (opendata == NULL)
95d35cb4 1816 goto err_put_state_owner;
1da177e4 1817
82a2c1b7
AV		 1818 if (dentry->d_inode != NULL)
1819 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1820
24ac23ab 1821 status = _nfs4_proc_open(opendata);
1da177e4 1822 if (status != 0)
c6d00e63 1823 goto err_opendata_put;
1da177e4 1824
24ac23ab 1825 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1826 status = PTR_ERR(state);
1827 if (IS_ERR(state))
c6d00e63 1828 goto err_opendata_put;
0df5dd4a 1829 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1830 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1831
1832 if (opendata->o_arg.open_flags & O_EXCL) {
1833 nfs4_exclusive_attrset(opendata, sattr);
1834
1835 nfs_fattr_init(opendata->o_res.f_attr);
1836 status = nfs4_do_setattr(state->inode, cred,
1837 opendata->o_res.f_attr, sattr,
1838 state);
1839 if (status == 0)
1840 nfs_setattr_update_inode(state->inode, sattr);
1841 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1842 }
c6d00e63 1843 nfs4_opendata_put(opendata);
1da177e4 1844 nfs4_put_state_owner(sp);
1da177e4
LT		 1845 *res = state;
1846 return 0;
c6d00e63
TM		 1847err_opendata_put:
1848 nfs4_opendata_put(opendata);
e56e0b78
TM		 1849err_put_state_owner:
1850 nfs4_put_state_owner(sp);
1da177e4 1851out_err:
1da177e4
LT		 1852 *res = NULL;
1853 return status;
1854}
1855
1856
82a2c1b7 1857static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1858{
1859 struct nfs4_exception exception = { };
1860 struct nfs4_state *res;
1861 int status;
1862
1863 do {
82a2c1b7 1864 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1865 if (status == 0)
1866 break;
1867 /* NOTE: BAD_SEQID means the server and client disagree about the
1868 * book-keeping w.r.t. state-changing operations
1869 * (OPEN/CLOSE/LOCK/LOCKU...)
1870 * It is actually a sign of a bug on the client or on the server.
1871 *
1872 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1873 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1874 * have unhashed the old state_owner for us, and that we can
1875 * therefore safely retry using a new one. We should still warn
1876 * the user though...
1877 */
1878 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1879 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1880 " returned a bad sequence-id error!\n",
1881 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1882 exception.retry = 1;
1883 continue;
1884 }
550f5747
TM		 1885 /*
1886 * BAD_STATEID on OPEN means that the server cancelled our
1887 * state before it received the OPEN_CONFIRM.
1888 * Recover by retrying the request as per the discussion
1889 * on Page 181 of RFC3530.
1890 */
1891 if (status == -NFS4ERR_BAD_STATEID) {
1892 exception.retry = 1;
1893 continue;
1894 }
aac00a8d
TM		 1895 if (status == -EAGAIN) {
1896 /* We must have found a delegation */
1897 exception.retry = 1;
1898 continue;
1899 }
1da177e4
LT		 1900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1901 status, &exception));
1902 } while (exception.retry);
1903 return res;
1904}
1905
659bfcd6
TM		 1906static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1907 struct nfs_fattr *fattr, struct iattr *sattr,
1908 struct nfs4_state *state)
1da177e4 1909{
3e4f6290 1910 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1911 struct nfs_setattrargs arg = {
3e4f6290 1912 .fh = NFS_FH(inode),
1da177e4
LT		 1913 .iap = sattr,
1914 .server = server,
1915 .bitmask = server->attr_bitmask,
1916 };
1917 struct nfs_setattrres res = {
1918 .fattr = fattr,
1919 .server = server,
1920 };
1921 struct rpc_message msg = {
659bfcd6
TM		 1922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1923 .rpc_argp = &arg,
1924 .rpc_resp = &res,
1925 .rpc_cred = cred,
1da177e4 1926 };
26e976a8 1927 unsigned long timestamp = jiffies;
65e4308d 1928 int status;
1da177e4 1929
0e574af1 1930 nfs_fattr_init(fattr);
1da177e4 1931
4fc8796d
TM		 1932 if (state != NULL) {
1933 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1934 current->files, current->tgid);
1935 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1936 FMODE_WRITE)) {
3e4f6290 1937 /* Use that stateid */
08e9eac4 1938 } else
f597c537 1939 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1940
7c513058 1941 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1942 if (status == 0 && state != NULL)
1943 renew_lease(server, timestamp);
65e4308d 1944 return status;
1da177e4
LT		 1945}
1946
659bfcd6
TM		 1947static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1948 struct nfs_fattr *fattr, struct iattr *sattr,
1949 struct nfs4_state *state)
1da177e4 1950{
3e4f6290 1951 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1952 struct nfs4_exception exception = {
1953 .state = state,
3114ea7a 1954 .inode = inode,
a1d0b5ee 1955 };
1da177e4
LT		 1956 int err;
1957 do {
1958 err = nfs4_handle_exception(server,
659bfcd6 1959 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1960 &exception);
1961 } while (exception.retry);
1962 return err;
1963}
1964
1965struct nfs4_closedata {
1966 struct inode *inode;
1967 struct nfs4_state *state;
1968 struct nfs_closeargs arg;
1969 struct nfs_closeres res;
516a6af6 1970 struct nfs_fattr fattr;
26e976a8 1971 unsigned long timestamp;
f7e8917a
FI		 1972 bool roc;
1973 u32 roc_barrier;
1da177e4
LT		 1974};
1975
963d8fe5 1976static void nfs4_free_closedata(void *data)
9512135d 1977{
963d8fe5
TM		 1978 struct nfs4_closedata *calldata = data;
1979 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1980 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1981
f7e8917a
FI		 1982 if (calldata->roc)
1983 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1984 nfs4_put_open_state(calldata->state);
1985 nfs_free_seqid(calldata->arg.seqid);
9512135d 1986 nfs4_put_state_owner(sp);
643168c2 1987 nfs_sb_deactive(sb);
9512135d
TM		 1988 kfree(calldata);
1989}
1990
88069f77
TM		 1991static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1992 fmode_t fmode)
1993{
1994 spin_lock(&state->owner->so_lock);
1995 if (!(fmode & FMODE_READ))
1996 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1997 if (!(fmode & FMODE_WRITE))
1998 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1999 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2000 spin_unlock(&state->owner->so_lock);
2001}
2002
963d8fe5 2003static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2004{
963d8fe5 2005 struct nfs4_closedata *calldata = data;
1da177e4 2006 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2007 struct nfs_server *server = NFS_SERVER(calldata->inode);
2008
a3ca5651 2009 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2010 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2011 return;
1da177e4
LT		 2012 /* hmm. we are done with the inode, and in the process of freeing
2013 * the state_owner. we keep this around to process errors
2014 */
1da177e4
LT		 2015 switch (task->tk_status) {
2016 case 0:
f7e8917a
FI		 2017 if (calldata->roc)
2018 pnfs_roc_set_barrier(state->inode,
2019 calldata->roc_barrier);
45328c35 2020 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2021 renew_lease(server, calldata->timestamp);
88069f77
TM		 2022 nfs4_close_clear_stateid_flags(state,
2023 calldata->arg.fmode);
1da177e4
LT		 2024 break;
2025 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2026 case -NFS4ERR_OLD_STATEID:
2027 case -NFS4ERR_BAD_STATEID:
1da177e4 2028 case -NFS4ERR_EXPIRED:
dc0b027d 2029 if (calldata->arg.fmode == 0)
9e33bed5 2030 break;
1da177e4 2031 default:
72211dbe
TM		 2032 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2033 rpc_restart_call_prepare(task);
1da177e4 2034 }
72211dbe 2035 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2036 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2037 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2038}
2039
4ce70ada 2040static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2041{
4ce70ada 2042 struct nfs4_closedata *calldata = data;
9512135d 2043 struct nfs4_state *state = calldata->state;
88069f77 2044 int call_close = 0;
9512135d 2045
a3ca5651 2046 dprintk("%s: begin!\n", __func__);
963d8fe5 2047 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2048 return;
003707c7 2049
88069f77
TM		 2050 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2051 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2052 spin_lock(&state->owner->so_lock);
003707c7 2053 /* Calculate the change in open mode */
e7616923 2054 if (state->n_rdwr == 0) {
003707c7 2055 if (state->n_rdonly == 0) {
88069f77
TM		 2056 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2057 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2058 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2059 }
2060 if (state->n_wronly == 0) {
88069f77
TM		 2061 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2062 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2063 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2064 }
e7616923 2065 }
4cecb76f 2066 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2067
2068 if (!call_close) {
963d8fe5
TM		 2069 /* Note: exit _without_ calling nfs4_close_done */
2070 task->tk_action = NULL;
a3ca5651 2071 goto out;
9512135d 2072 }
88069f77 2073
f7e8917a 2074 if (calldata->arg.fmode == 0) {
88069f77 2075 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2076 if (calldata->roc &&
2077 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2078 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2079 task, NULL);
a3ca5651 2080 goto out;
f7e8917a
FI		 2081 }
2082 }
88069f77 2083
516a6af6 2084 nfs_fattr_init(calldata->res.fattr);
26e976a8 2085 calldata->timestamp = jiffies;
035168ab 2086 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2087 &calldata->arg.seq_args,
2088 &calldata->res.seq_res,
2089 task))
a3ca5651 2090 goto out;
5138fde0 2091 rpc_call_start(task);
a3ca5651
CL		 2092out:
2093 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2094}
2095
963d8fe5 2096static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2097 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2098 .rpc_call_done = nfs4_close_done,
2099 .rpc_release = nfs4_free_closedata,
2100};
2101
1da177e4
LT		 2102/*
2103 * It is possible for data to be read/written from a mem-mapped file
2104 * after the sys_close call (which hits the vfs layer as a flush).
2105 * This means that we can't safely call nfsv4 close on a file until
2106 * the inode is cleared. This in turn means that we are not good
2107 * NFSv4 citizens - we do not indicate to the server to update the file's
2108 * share state even when we are done with one of the three share
2109 * stateid's in the inode.
2110 *
2111 * NOTE: Caller must be holding the sp->so_owner semaphore!
2112 */
643168c2 2113int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2114{
4a35bd41 2115 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2116 struct nfs4_closedata *calldata;
b39e625b
TM		 2117 struct nfs4_state_owner *sp = state->owner;
2118 struct rpc_task *task;
5138fde0
TM		 2119 struct rpc_message msg = {
2120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2121 .rpc_cred = state->owner->so_cred,
2122 };
c970aa85
TM		 2123 struct rpc_task_setup task_setup_data = {
2124 .rpc_client = server->client,
5138fde0 2125 .rpc_message = &msg,
c970aa85 2126 .callback_ops = &nfs4_close_ops,
101070ca 2127 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2128 .flags = RPC_TASK_ASYNC,
2129 };
9512135d 2130 int status = -ENOMEM;
1da177e4 2131
8535b2be 2132 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2133 if (calldata == NULL)
9512135d 2134 goto out;
9d12b216 2135 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2136 calldata->inode = state->inode;
1da177e4 2137 calldata->state = state;
4a35bd41 2138 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2139 calldata->arg.stateid = &state->open_stateid;
1da177e4 2140 /* Serialization for the sequence id */
8535b2be 2141 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2142 if (calldata->arg.seqid == NULL)
2143 goto out_free_calldata;
dc0b027d 2144 calldata->arg.fmode = 0;
a65318bf 2145 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2146 calldata->res.fattr = &calldata->fattr;
c1d51931 2147 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2148 calldata->res.server = server;
f7e8917a 2149 calldata->roc = roc;
643168c2 2150 nfs_sb_active(calldata->inode->i_sb);
9512135d 2151
1174dd1f
TM		 2152 msg.rpc_argp = &calldata->arg;
2153 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2154 task_setup_data.callback_data = calldata;
2155 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2156 if (IS_ERR(task))
2157 return PTR_ERR(task);
a49c3c77
TM		 2158 status = 0;
2159 if (wait)
2160 status = rpc_wait_for_completion_task(task);
b39e625b 2161 rpc_put_task(task);
a49c3c77 2162 return status;
9512135d
TM		 2163out_free_calldata:
2164 kfree(calldata);
2165out:
f7e8917a
FI		 2166 if (roc)
2167 pnfs_roc_release(state->inode);
b39e625b
TM		 2168 nfs4_put_open_state(state);
2169 nfs4_put_state_owner(sp);
9512135d 2170 return status;
1da177e4
LT		 2171}
2172
2b484297 2173static struct inode *
cd9a1c0e 2174nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2175{
1da177e4 2176 struct nfs4_state *state;
1da177e4 2177
565277f6 2178 /* Protect against concurrent sillydeletes */
3d4ff43d 2179 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2180 if (IS_ERR(state))
2181 return ERR_CAST(state);
cd9a1c0e 2182 ctx->state = state;
f46e0bd3 2183 return igrab(state->inode);
1da177e4
LT		 2184}
2185
1185a552 2186static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2187{
2188 if (ctx->state == NULL)
2189 return;
2190 if (is_sync)
643168c2 2191 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2192 else
643168c2 2193 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2194}
1da177e4
LT		 2195
2196static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2197{
43652ad5
BH		 2198 struct nfs4_server_caps_arg args = {
2199 .fhandle = fhandle,
2200 };
1da177e4
LT		 2201 struct nfs4_server_caps_res res = {};
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2204 .rpc_argp = &args,
1da177e4
LT		 2205 .rpc_resp = &res,
2206 };
2207 int status;
2208
7c513058 2209 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2210 if (status == 0) {
2211 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2212 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2213 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2214 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2215 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2216 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2217 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2218 server->caps |= NFS_CAP_ACLS;
2219 if (res.has_links != 0)
2220 server->caps |= NFS_CAP_HARDLINKS;
2221 if (res.has_symlinks != 0)
2222 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2223 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2224 server->caps |= NFS_CAP_FILEID;
2225 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2226 server->caps |= NFS_CAP_MODE;
2227 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2228 server->caps |= NFS_CAP_NLINK;
2229 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2230 server->caps |= NFS_CAP_OWNER;
2231 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2232 server->caps |= NFS_CAP_OWNER_GROUP;
2233 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2234 server->caps |= NFS_CAP_ATIME;
2235 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2236 server->caps |= NFS_CAP_CTIME;
2237 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2238 server->caps |= NFS_CAP_MTIME;
2239
a65318bf
TM		 2240 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2241 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2242 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2243 server->acl_bitmask = res.acl_bitmask;
264e6351 2244 server->fh_expire_type = res.fh_expire_type;
1da177e4 2245 }
cccef3b9 2246
1da177e4
LT		 2247 return status;
2248}
2249
55a97593 2250int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2251{
2252 struct nfs4_exception exception = { };
2253 int err;
2254 do {
2255 err = nfs4_handle_exception(server,
2256 _nfs4_server_capabilities(server, fhandle),
2257 &exception);
2258 } while (exception.retry);
2259 return err;
2260}
2261
2262static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2263 struct nfs_fsinfo *info)
2264{
1da177e4
LT		 2265 struct nfs4_lookup_root_arg args = {
2266 .bitmask = nfs4_fattr_bitmap,
2267 };
2268 struct nfs4_lookup_res res = {
2269 .server = server,
0e574af1 2270 .fattr = info->fattr,
1da177e4
LT		 2271 .fh = fhandle,
2272 };
2273 struct rpc_message msg = {
2274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2275 .rpc_argp = &args,
2276 .rpc_resp = &res,
2277 };
008f55d0 2278
0e574af1 2279 nfs_fattr_init(info->fattr);
7c513058 2280 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2281}
2282
2283static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *info)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
fb8a5ba8
BS		 2289 err = _nfs4_lookup_root(server, fhandle, info);
2290 switch (err) {
2291 case 0:
2292 case -NFS4ERR_WRONGSEC:
05e9cfb4 2293 goto out;
fb8a5ba8
BS		 2294 default:
2295 err = nfs4_handle_exception(server, err, &exception);
2296 }
1da177e4 2297 } while (exception.retry);
05e9cfb4 2298out:
1da177e4
LT		 2299 return err;
2300}
2301
8f70e95f
BS		 2302static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2303 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2304{
2305 struct rpc_auth *auth;
2306 int ret;
2307
2308 auth = rpcauth_create(flavor, server->client);
2309 if (!auth) {
2310 ret = -EIO;
2311 goto out;
2312 }
2313 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2314out:
2315 return ret;
2316}
2317
801a16dc 2318static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2319 struct nfs_fsinfo *info)
1da177e4 2320{
8f70e95f 2321 int i, len, status = 0;
0fabee24 2322 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2323
801a16dc
BS		 2324 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2325 flav_array[len] = RPC_AUTH_NULL;
2326 len += 1;
8f70e95f
BS		 2327
2328 for (i = 0; i < len; i++) {
2329 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2330 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2331 continue;
2332 break;
8f70e95f 2333 }
fb8a5ba8
BS		 2334 /*
2335 * -EACCESS could mean that the user doesn't have correct permissions
2336 * to access the mount. It could also mean that we tried to mount
2337 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2338 * existing mount programs don't handle -EACCES very well so it should
2339 * be mapped to -EPERM instead.
2340 */
2341 if (status == -EACCES)
2342 status = -EPERM;
801a16dc
BS		 2343 return status;
2344}
2345
2346/*
2347 * get the file handle for the "/" directory on the server
2348 */
2349static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2350 struct nfs_fsinfo *info)
2351{
fca78d6d 2352 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2353 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2354 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2355 /*
2356 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2357 * by nfs4_map_errors() as this function exits.
2358 */
fca78d6d 2359 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2360 if (status == 0)
2361 status = nfs4_server_capabilities(server, fhandle);
2362 if (status == 0)
2363 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2364 return nfs4_map_errors(status);
1da177e4
LT		 2365}
2366
6b97fd3d
MN		 2367/*
2368 * Get locations and (maybe) other attributes of a referral.
2369 * Note that we'll actually follow the referral later when
2370 * we detect fsid mismatch in inode revalidation
2371 */
533eb461
AA		 2372static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2373 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2374{
2375 int status = -ENOMEM;
2376 struct page *page = NULL;
2377 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2378
2379 page = alloc_page(GFP_KERNEL);
2380 if (page == NULL)
2381 goto out;
2382 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2383 if (locations == NULL)
2384 goto out;
2385
c228fd3a 2386 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2387 if (status != 0)
2388 goto out;
2389 /* Make sure server returned a different fsid for the referral */
2390 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2391 dprintk("%s: server did not return a different fsid for"
2392 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2393 status = -EIO;
2394 goto out;
2395 }
533eb461
AA		 2396 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2397 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2398
533eb461 2399 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2400 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2401 memset(fhandle, 0, sizeof(struct nfs_fh));
2402out:
2403 if (page)
2404 __free_page(page);
5d7ca35a 2405 kfree(locations);
6b97fd3d
MN		 2406 return status;
2407}
2408
1da177e4
LT		 2409static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2410{
2411 struct nfs4_getattr_arg args = {
2412 .fh = fhandle,
2413 .bitmask = server->attr_bitmask,
2414 };
2415 struct nfs4_getattr_res res = {
2416 .fattr = fattr,
2417 .server = server,
2418 };
2419 struct rpc_message msg = {
2420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2421 .rpc_argp = &args,
2422 .rpc_resp = &res,
2423 };
2424
0e574af1 2425 nfs_fattr_init(fattr);
7c513058 2426 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2427}
2428
2429static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2430{
2431 struct nfs4_exception exception = { };
2432 int err;
2433 do {
2434 err = nfs4_handle_exception(server,
2435 _nfs4_proc_getattr(server, fhandle, fattr),
2436 &exception);
2437 } while (exception.retry);
2438 return err;
2439}
2440
2441/*
2442 * The file is not closed if it is opened due to the a request to change
2443 * the size of the file. The open call will not be needed once the
2444 * VFS layer lookup-intents are implemented.
2445 *
2446 * Close is called when the inode is destroyed.
2447 * If we haven't opened the file for O_WRONLY, we
2448 * need to in the size_change case to obtain a stateid.
2449 *
2450 * Got race?
2451 * Because OPEN is always done by name in nfsv4, it is
2452 * possible that we opened a different file by the same
2453 * name. We can recognize this race condition, but we
2454 * can't do anything about it besides returning an error.
2455 *
2456 * This will be fixed with VFS changes (lookup-intent).
2457 */
2458static int
2459nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2460 struct iattr *sattr)
2461{
08e9eac4 2462 struct inode *inode = dentry->d_inode;
659bfcd6 2463 struct rpc_cred *cred = NULL;
d530838b 2464 struct nfs4_state *state = NULL;
1da177e4
LT		 2465 int status;
2466
8a1636c4
BH		 2467 if (pnfs_ld_layoutret_on_setattr(inode))
2468 pnfs_return_layout(inode);
2469
0e574af1 2470 nfs_fattr_init(fattr);
1da177e4 2471
d530838b 2472 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2473 if (sattr->ia_valid & ATTR_FILE) {
2474 struct nfs_open_context *ctx;
2475
2476 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2477 if (ctx) {
2478 cred = ctx->cred;
2479 state = ctx->state;
2480 }
659bfcd6 2481 }
08e9eac4 2482
536e43d1
TM		 2483 /* Deal with open(O_TRUNC) */
2484 if (sattr->ia_valid & ATTR_OPEN)
2485 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2486
659bfcd6 2487 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2488 if (status == 0)
2489 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2490 return status;
2491}
2492
0c2e53f1
TM		 2493static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2494 const struct qstr *name, struct nfs_fh *fhandle,
2495 struct nfs_fattr *fattr)
2b3de441 2496{
0c2e53f1 2497 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2498 int status;
2499 struct nfs4_lookup_arg args = {
2500 .bitmask = server->attr_bitmask,
0c2e53f1 2501 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2502 .name = name,
2503 };
2504 struct nfs4_lookup_res res = {
2505 .server = server,
2506 .fattr = fattr,
2507 .fh = fhandle,
2508 };
2509 struct rpc_message msg = {
2510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2511 .rpc_argp = &args,
2512 .rpc_resp = &res,
2513 };
2514
2515 nfs_fattr_init(fattr);
2516
1da177e4 2517 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2518 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2519 dprintk("NFS reply lookup: %d\n", status);
2520 return status;
2521}
2522
7ebb9315
BS		 2523void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2524{
2525 memset(fh, 0, sizeof(struct nfs_fh));
2526 fattr->fsid.major = 1;
2527 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2528 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2529 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2530 fattr->nlink = 2;
2531}
2532
7c513058
BS		 2533static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2534 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2535{
2536 struct nfs4_exception exception = { };
2537 int err;
2538 do {
0c2e53f1
TM		 2539 int status;
2540
2541 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2542 switch (status) {
08ef7bd3
TM		 2543 case -NFS4ERR_BADNAME:
2544 return -ENOENT;
0c2e53f1 2545 case -NFS4ERR_MOVED:
a6f498a8 2546 return nfs4_get_referral(dir, name, fattr, fhandle);
0c2e53f1 2547 case -NFS4ERR_WRONGSEC:
7ebb9315 2548 nfs_fixup_secinfo_attributes(fattr, fhandle);
0c2e53f1
TM		 2549 }
2550 err = nfs4_handle_exception(NFS_SERVER(dir),
2551 status, &exception);
1da177e4
LT		 2552 } while (exception.retry);
2553 return err;
2554}
2555
2556static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2557{
76b32999 2558 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2559 struct nfs4_accessargs args = {
2560 .fh = NFS_FH(inode),
a4980e78 2561 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2562 };
2563 struct nfs4_accessres res = {
2564 .server = server,
1da177e4 2565 };
1da177e4
LT		 2566 struct rpc_message msg = {
2567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2568 .rpc_argp = &args,
2569 .rpc_resp = &res,
2570 .rpc_cred = entry->cred,
2571 };
2572 int mode = entry->mask;
2573 int status;
2574
2575 /*
2576 * Determine which access bits we want to ask for...
2577 */
2578 if (mode & MAY_READ)
2579 args.access |= NFS4_ACCESS_READ;
2580 if (S_ISDIR(inode->i_mode)) {
2581 if (mode & MAY_WRITE)
2582 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2583 if (mode & MAY_EXEC)
2584 args.access |= NFS4_ACCESS_LOOKUP;
2585 } else {
2586 if (mode & MAY_WRITE)
2587 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2588 if (mode & MAY_EXEC)
2589 args.access |= NFS4_ACCESS_EXECUTE;
2590 }
c407d41a
TM		 2591
2592 res.fattr = nfs_alloc_fattr();
2593 if (res.fattr == NULL)
2594 return -ENOMEM;
2595
7c513058 2596 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2597 if (!status) {
2598 entry->mask = 0;
2599 if (res.access & NFS4_ACCESS_READ)
2600 entry->mask |= MAY_READ;
2601 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2602 entry->mask |= MAY_WRITE;
2603 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2604 entry->mask |= MAY_EXEC;
c407d41a 2605 nfs_refresh_inode(inode, res.fattr);
1da177e4 2606 }
c407d41a 2607 nfs_free_fattr(res.fattr);
1da177e4
LT		 2608 return status;
2609}
2610
2611static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2612{
2613 struct nfs4_exception exception = { };
2614 int err;
2615 do {
2616 err = nfs4_handle_exception(NFS_SERVER(inode),
2617 _nfs4_proc_access(inode, entry),
2618 &exception);
2619 } while (exception.retry);
2620 return err;
2621}
2622
2623/*
2624 * TODO: For the time being, we don't try to get any attributes
2625 * along with any of the zero-copy operations READ, READDIR,
2626 * READLINK, WRITE.
2627 *
2628 * In the case of the first three, we want to put the GETATTR
2629 * after the read-type operation -- this is because it is hard
2630 * to predict the length of a GETATTR response in v4, and thus
2631 * align the READ data correctly. This means that the GETATTR
2632 * may end up partially falling into the page cache, and we should
2633 * shift it into the 'tail' of the xdr_buf before processing.
2634 * To do this efficiently, we need to know the total length
2635 * of data received, which doesn't seem to be available outside
2636 * of the RPC layer.
2637 *
2638 * In the case of WRITE, we also want to put the GETATTR after
2639 * the operation -- in this case because we want to make sure
2640 * we get the post-operation mtime and size. This means that
2641 * we can't use xdr_encode_pages() as written: we need a variant
2642 * of it which would leave room in the 'tail' iovec.
2643 *
2644 * Both of these changes to the XDR layer would in fact be quite
2645 * minor, but I decided to leave them for a subsequent patch.
2646 */
2647static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2648 unsigned int pgbase, unsigned int pglen)
2649{
2650 struct nfs4_readlink args = {
2651 .fh = NFS_FH(inode),
2652 .pgbase = pgbase,
2653 .pglen = pglen,
2654 .pages = &page,
2655 };
f50c7000 2656 struct nfs4_readlink_res res;
1da177e4
LT		 2657 struct rpc_message msg = {
2658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2659 .rpc_argp = &args,
f50c7000 2660 .rpc_resp = &res,
1da177e4
LT		 2661 };
2662
7c513058 2663 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2664}
2665
2666static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2667 unsigned int pgbase, unsigned int pglen)
2668{
2669 struct nfs4_exception exception = { };
2670 int err;
2671 do {
2672 err = nfs4_handle_exception(NFS_SERVER(inode),
2673 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2674 &exception);
2675 } while (exception.retry);
2676 return err;
2677}
2678
1da177e4
LT		 2679/*
2680 * Got race?
2681 * We will need to arrange for the VFS layer to provide an atomic open.
2682 * Until then, this create/open method is prone to inefficiency and race
2683 * conditions due to the lookup, create, and open VFS calls from sys_open()
2684 * placed on the wire.
2685 *
2686 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2687 * The file will be opened again in the subsequent VFS open call
2688 * (nfs4_proc_file_open).
2689 *
2690 * The open for read will just hang around to be used by any process that
2691 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2692 */
2693
2694static int
2695nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2696 int flags, struct nfs_open_context *ctx)
1da177e4 2697{
82a2c1b7 2698 struct dentry *de = dentry;
1da177e4 2699 struct nfs4_state *state;
c0204fd2
TM		 2700 struct rpc_cred *cred = NULL;
2701 fmode_t fmode = 0;
1da177e4
LT		 2702 int status = 0;
2703
c0204fd2
TM		 2704 if (ctx != NULL) {
2705 cred = ctx->cred;
3d4ff43d 2706 de = ctx->dentry;
c0204fd2 2707 fmode = ctx->mode;
1da177e4 2708 }
a8a5da99 2709 sattr->ia_mode &= ~current_umask();
82a2c1b7 2710 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2711 d_drop(dentry);
1da177e4
LT		 2712 if (IS_ERR(state)) {
2713 status = PTR_ERR(state);
c0204fd2 2714 goto out;
1da177e4 2715 }
d4d9cdcb 2716 d_add(dentry, igrab(state->inode));
d75340cc 2717 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2718 if (ctx != NULL)
2719 ctx->state = state;
02a913a7 2720 else
643168c2 2721 nfs4_close_sync(state, fmode);
1da177e4
LT		 2722out:
2723 return status;
2724}
2725
2726static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2727{
16e42959 2728 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2729 struct nfs_removeargs args = {
1da177e4 2730 .fh = NFS_FH(dir),
4fdc17b2
TM		 2731 .name.len = name->len,
2732 .name.name = name->name,
16e42959
TM		 2733 .bitmask = server->attr_bitmask,
2734 };
4fdc17b2 2735 struct nfs_removeres res = {
16e42959 2736 .server = server,
1da177e4 2737 };
1da177e4 2738 struct rpc_message msg = {
4fdc17b2
TM		 2739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2740 .rpc_argp = &args,
2741 .rpc_resp = &res,
1da177e4 2742 };
d346890b
TM		 2743 int status = -ENOMEM;
2744
2745 res.dir_attr = nfs_alloc_fattr();
2746 if (res.dir_attr == NULL)
2747 goto out;
1da177e4 2748
7c513058 2749 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2750 if (status == 0) {
2751 update_changeattr(dir, &res.cinfo);
d346890b 2752 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2753 }
d346890b
TM		 2754 nfs_free_fattr(res.dir_attr);
2755out:
1da177e4
LT		 2756 return status;
2757}
2758
2759static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2760{
2761 struct nfs4_exception exception = { };
2762 int err;
2763 do {
2764 err = nfs4_handle_exception(NFS_SERVER(dir),
2765 _nfs4_proc_remove(dir, name),
2766 &exception);
2767 } while (exception.retry);
2768 return err;
2769}
2770
e4eff1a6 2771static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2772{
e4eff1a6
TM		 2773 struct nfs_server *server = NFS_SERVER(dir);
2774 struct nfs_removeargs *args = msg->rpc_argp;
2775 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2776
a65318bf 2777 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2778 res->server = server;
1da177e4 2779 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2780 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2781}
2782
34e137cc
BS		 2783static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2784{
2785 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2786 &data->args.seq_args,
2787 &data->res.seq_res,
2788 task))
2789 return;
2790 rpc_call_start(task);
1da177e4
LT		 2791}
2792
e4eff1a6 2793static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2794{
e4eff1a6
TM		 2795 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2796
14516c3a
TM		 2797 if (!nfs4_sequence_done(task, &res->seq_res))
2798 return 0;
9e33bed5 2799 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2800 return 0;
2801 update_changeattr(dir, &res->cinfo);
d346890b 2802 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2803 return 1;
1da177e4
LT		 2804}
2805
d3d4152a
JL		 2806static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2807{
2808 struct nfs_server *server = NFS_SERVER(dir);
2809 struct nfs_renameargs *arg = msg->rpc_argp;
2810 struct nfs_renameres *res = msg->rpc_resp;
2811
2812 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2813 arg->bitmask = server->attr_bitmask;
2814 res->server = server;
9d12b216 2815 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2816}
2817
c6bfa1a1
BS		 2818static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2819{
2820 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2821 &data->args.seq_args,
2822 &data->res.seq_res,
2823 task))
2824 return;
2825 rpc_call_start(task);
d3d4152a
JL		 2826}
2827
2828static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2829 struct inode *new_dir)
2830{
2831 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2832
2833 if (!nfs4_sequence_done(task, &res->seq_res))
2834 return 0;
2835 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2836 return 0;
2837
2838 update_changeattr(old_dir, &res->old_cinfo);
2839 nfs_post_op_update_inode(old_dir, res->old_fattr);
2840 update_changeattr(new_dir, &res->new_cinfo);
2841 nfs_post_op_update_inode(new_dir, res->new_fattr);
2842 return 1;
2843}
2844
1da177e4
LT		 2845static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2846 struct inode *new_dir, struct qstr *new_name)
2847{
6caf2c82 2848 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2849 struct nfs_renameargs arg = {
1da177e4
LT		 2850 .old_dir = NFS_FH(old_dir),
2851 .new_dir = NFS_FH(new_dir),
2852 .old_name = old_name,
2853 .new_name = new_name,
6caf2c82
TM		 2854 .bitmask = server->attr_bitmask,
2855 };
e8582a8b 2856 struct nfs_renameres res = {
6caf2c82 2857 .server = server,
1da177e4 2858 };
1da177e4
LT		 2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2861 .rpc_argp = &arg,
2862 .rpc_resp = &res,
2863 };
011fff72 2864 int status = -ENOMEM;
1da177e4 2865
011fff72
TM		 2866 res.old_fattr = nfs_alloc_fattr();
2867 res.new_fattr = nfs_alloc_fattr();
2868 if (res.old_fattr == NULL || res.new_fattr == NULL)
2869 goto out;
1da177e4 2870
7c513058 2871 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2872 if (!status) {
2873 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2874 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2875 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2876 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2877 }
011fff72
TM		 2878out:
2879 nfs_free_fattr(res.new_fattr);
2880 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2881 return status;
2882}
2883
2884static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2885 struct inode *new_dir, struct qstr *new_name)
2886{
2887 struct nfs4_exception exception = { };
2888 int err;
2889 do {
2890 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2891 _nfs4_proc_rename(old_dir, old_name,
2892 new_dir, new_name),
2893 &exception);
2894 } while (exception.retry);
2895 return err;
2896}
2897
2898static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2899{
91ba2eee 2900 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2901 struct nfs4_link_arg arg = {
2902 .fh = NFS_FH(inode),
2903 .dir_fh = NFS_FH(dir),
2904 .name = name,
91ba2eee
TM		 2905 .bitmask = server->attr_bitmask,
2906 };
91ba2eee
TM		 2907 struct nfs4_link_res res = {
2908 .server = server,
1da177e4 2909 };
1da177e4
LT		 2910 struct rpc_message msg = {
2911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2912 .rpc_argp = &arg,
91ba2eee 2913 .rpc_resp = &res,
1da177e4 2914 };
136f2627
TM		 2915 int status = -ENOMEM;
2916
2917 res.fattr = nfs_alloc_fattr();
2918 res.dir_attr = nfs_alloc_fattr();
2919 if (res.fattr == NULL || res.dir_attr == NULL)
2920 goto out;
1da177e4 2921
7c513058 2922 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2923 if (!status) {
2924 update_changeattr(dir, &res.cinfo);
2925 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2926 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2927 }
136f2627
TM		 2928out:
2929 nfs_free_fattr(res.dir_attr);
2930 nfs_free_fattr(res.fattr);
1da177e4
LT		 2931 return status;
2932}
2933
2934static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2935{
2936 struct nfs4_exception exception = { };
2937 int err;
2938 do {
2939 err = nfs4_handle_exception(NFS_SERVER(inode),
2940 _nfs4_proc_link(inode, dir, name),
2941 &exception);
2942 } while (exception.retry);
2943 return err;
2944}
2945
57dc9a57
TM		 2946struct nfs4_createdata {
2947 struct rpc_message msg;
2948 struct nfs4_create_arg arg;
2949 struct nfs4_create_res res;
2950 struct nfs_fh fh;
2951 struct nfs_fattr fattr;
2952 struct nfs_fattr dir_fattr;
2953};
2954
2955static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2956 struct qstr *name, struct iattr *sattr, u32 ftype)
2957{
2958 struct nfs4_createdata *data;
2959
2960 data = kzalloc(sizeof(*data), GFP_KERNEL);
2961 if (data != NULL) {
2962 struct nfs_server *server = NFS_SERVER(dir);
2963
2964 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2965 data->msg.rpc_argp = &data->arg;
2966 data->msg.rpc_resp = &data->res;
2967 data->arg.dir_fh = NFS_FH(dir);
2968 data->arg.server = server;
2969 data->arg.name = name;
2970 data->arg.attrs = sattr;
2971 data->arg.ftype = ftype;
2972 data->arg.bitmask = server->attr_bitmask;
2973 data->res.server = server;
2974 data->res.fh = &data->fh;
2975 data->res.fattr = &data->fattr;
2976 data->res.dir_fattr = &data->dir_fattr;
2977 nfs_fattr_init(data->res.fattr);
2978 nfs_fattr_init(data->res.dir_fattr);
2979 }
2980 return data;
2981}
2982
2983static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2984{
7c513058 2985 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2986 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2987 if (status == 0) {
2988 update_changeattr(dir, &data->res.dir_cinfo);
2989 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2990 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2991 }
2992 return status;
2993}
2994
2995static void nfs4_free_createdata(struct nfs4_createdata *data)
2996{
2997 kfree(data);
2998}
2999
4f390c15 3000static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3001 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3002{
57dc9a57
TM		 3003 struct nfs4_createdata *data;
3004 int status = -ENAMETOOLONG;
1da177e4 3005
94a6d753 3006 if (len > NFS4_MAXPATHLEN)
57dc9a57 3007 goto out;
4f390c15 3008
57dc9a57
TM		 3009 status = -ENOMEM;
3010 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3011 if (data == NULL)
3012 goto out;
3013
3014 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3015 data->arg.u.symlink.pages = &page;
3016 data->arg.u.symlink.len = len;
1da177e4 3017
57dc9a57
TM		 3018 status = nfs4_do_create(dir, dentry, data);
3019
3020 nfs4_free_createdata(data);
3021out:
1da177e4
LT		 3022 return status;
3023}
3024
4f390c15 3025static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3026 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3027{
3028 struct nfs4_exception exception = { };
3029 int err;
3030 do {
3031 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3032 _nfs4_proc_symlink(dir, dentry, page,
3033 len, sattr),
1da177e4
LT		 3034 &exception);
3035 } while (exception.retry);
3036 return err;
3037}
3038
3039static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3040 struct iattr *sattr)
3041{
57dc9a57
TM		 3042 struct nfs4_createdata *data;
3043 int status = -ENOMEM;
1da177e4 3044
57dc9a57
TM		 3045 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3046 if (data == NULL)
3047 goto out;
3048
3049 status = nfs4_do_create(dir, dentry, data);
3050
3051 nfs4_free_createdata(data);
3052out:
1da177e4
LT		 3053 return status;
3054}
3055
3056static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3057 struct iattr *sattr)
3058{
3059 struct nfs4_exception exception = { };
3060 int err;
a8a5da99
AK		 3061
3062 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3063 do {
3064 err = nfs4_handle_exception(NFS_SERVER(dir),
3065 _nfs4_proc_mkdir(dir, dentry, sattr),
3066 &exception);
3067 } while (exception.retry);
3068 return err;
3069}
3070
3071static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3072 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3073{
3074 struct inode *dir = dentry->d_inode;
3075 struct nfs4_readdir_arg args = {
3076 .fh = NFS_FH(dir),
56e4ebf8 3077 .pages = pages,
1da177e4
LT		 3078 .pgbase = 0,
3079 .count = count,
96d25e53 3080 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3081 .plus = plus,
1da177e4
LT		 3082 };
3083 struct nfs4_readdir_res res;
3084 struct rpc_message msg = {
3085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3086 .rpc_argp = &args,
3087 .rpc_resp = &res,
3088 .rpc_cred = cred,
3089 };
3090 int status;
3091
3110ff80 3092 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3093 dentry->d_parent->d_name.name,
3094 dentry->d_name.name,
3095 (unsigned long long)cookie);
1da177e4
LT		 3096 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3097 res.pgbase = args.pgbase;
7c513058 3098 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3099 if (status >= 0) {
1da177e4 3100 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3101 status += args.pgbase;
3102 }
c4812998
TM		 3103
3104 nfs_invalidate_atime(dir);
3105
3110ff80 3106 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3107 return status;
3108}
3109
3110static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3111 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3112{
3113 struct nfs4_exception exception = { };
3114 int err;
3115 do {
3116 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3117 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3118 pages, count, plus),
1da177e4
LT		 3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3125 struct iattr *sattr, dev_t rdev)
3126{
57dc9a57
TM		 3127 struct nfs4_createdata *data;
3128 int mode = sattr->ia_mode;
3129 int status = -ENOMEM;
1da177e4
LT		 3130
3131 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3132 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3133
3134 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3135 if (data == NULL)
3136 goto out;
3137
1da177e4 3138 if (S_ISFIFO(mode))
57dc9a57 3139 data->arg.ftype = NF4FIFO;
1da177e4 3140 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3141 data->arg.ftype = NF4BLK;
3142 data->arg.u.device.specdata1 = MAJOR(rdev);
3143 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3144 }
3145 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3146 data->arg.ftype = NF4CHR;
3147 data->arg.u.device.specdata1 = MAJOR(rdev);
3148 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3149 }
1da177e4 3150
57dc9a57
TM		 3151 status = nfs4_do_create(dir, dentry, data);
3152
3153 nfs4_free_createdata(data);
3154out:
1da177e4
LT		 3155 return status;
3156}
3157
3158static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3159 struct iattr *sattr, dev_t rdev)
3160{
3161 struct nfs4_exception exception = { };
3162 int err;
a8a5da99
AK		 3163
3164 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3165 do {
3166 err = nfs4_handle_exception(NFS_SERVER(dir),
3167 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3168 &exception);
3169 } while (exception.retry);
3170 return err;
3171}
3172
3173static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3174 struct nfs_fsstat *fsstat)
3175{
3176 struct nfs4_statfs_arg args = {
3177 .fh = fhandle,
3178 .bitmask = server->attr_bitmask,
3179 };
24ad148a
BH		 3180 struct nfs4_statfs_res res = {
3181 .fsstat = fsstat,
3182 };
1da177e4
LT		 3183 struct rpc_message msg = {
3184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3185 .rpc_argp = &args,
24ad148a 3186 .rpc_resp = &res,
1da177e4
LT		 3187 };
3188
0e574af1 3189 nfs_fattr_init(fsstat->fattr);
7c513058 3190 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3191}
3192
3193static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3194{
3195 struct nfs4_exception exception = { };
3196 int err;
3197 do {
3198 err = nfs4_handle_exception(server,
3199 _nfs4_proc_statfs(server, fhandle, fsstat),
3200 &exception);
3201 } while (exception.retry);
3202 return err;
3203}
3204
3205static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3206 struct nfs_fsinfo *fsinfo)
3207{
3208 struct nfs4_fsinfo_arg args = {
3209 .fh = fhandle,
3210 .bitmask = server->attr_bitmask,
3211 };
3dda5e43
BH		 3212 struct nfs4_fsinfo_res res = {
3213 .fsinfo = fsinfo,
3214 };
1da177e4
LT		 3215 struct rpc_message msg = {
3216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3217 .rpc_argp = &args,
3dda5e43 3218 .rpc_resp = &res,
1da177e4
LT		 3219 };
3220
7c513058 3221 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3222}
3223
3224static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3225{
3226 struct nfs4_exception exception = { };
3227 int err;
3228
3229 do {
3230 err = nfs4_handle_exception(server,
3231 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3232 &exception);
3233 } while (exception.retry);
3234 return err;
3235}
3236
3237static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3238{
0e574af1 3239 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3240 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3241}
3242
3243static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3244 struct nfs_pathconf *pathconf)
3245{
3246 struct nfs4_pathconf_arg args = {
3247 .fh = fhandle,
3248 .bitmask = server->attr_bitmask,
3249 };
d45b2989
BH		 3250 struct nfs4_pathconf_res res = {
3251 .pathconf = pathconf,
3252 };
1da177e4
LT		 3253 struct rpc_message msg = {
3254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3255 .rpc_argp = &args,
d45b2989 3256 .rpc_resp = &res,
1da177e4
LT		 3257 };
3258
3259 /* None of the pathconf attributes are mandatory to implement */
3260 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3261 memset(pathconf, 0, sizeof(*pathconf));
3262 return 0;
3263 }
3264
0e574af1 3265 nfs_fattr_init(pathconf->fattr);
7c513058 3266 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3267}
3268
3269static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3270 struct nfs_pathconf *pathconf)
3271{
3272 struct nfs4_exception exception = { };
3273 int err;
3274
3275 do {
3276 err = nfs4_handle_exception(server,
3277 _nfs4_proc_pathconf(server, fhandle, pathconf),
3278 &exception);
3279 } while (exception.retry);
3280 return err;
3281}
3282
d20581aa
BH		 3283void __nfs4_read_done_cb(struct nfs_read_data *data)
3284{
3285 nfs_invalidate_atime(data->inode);
3286}
3287
cbdabc7f 3288static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3289{
ec06c096 3290 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3291
9e33bed5 3292 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3293 rpc_restart_call_prepare(task);
ec06c096 3294 return -EAGAIN;
1da177e4 3295 }
8850df99 3296
d20581aa 3297 __nfs4_read_done_cb(data);
1da177e4 3298 if (task->tk_status > 0)
ec06c096
TM		 3299 renew_lease(server, data->timestamp);
3300 return 0;
1da177e4
LT		 3301}
3302
cbdabc7f
AA		 3303static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3304{
3305
3306 dprintk("--> %s\n", __func__);
3307
3308 if (!nfs4_sequence_done(task, &data->res.seq_res))
3309 return -EAGAIN;
3310
d20581aa
BH		 3311 return data->read_done_cb ? data->read_done_cb(task, data) :
3312 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3313}
3314
bdc7f021 3315static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3316{
1da177e4 3317 data->timestamp = jiffies;
cbdabc7f 3318 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3319 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3320 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3321}
3322
ea7c3303
BS		 3323static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3324{
3325 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3326 &data->args.seq_args,
3327 &data->res.seq_res,
3328 task))
3329 return;
3330 rpc_call_start(task);
1da177e4
LT		 3331}
3332
cbdabc7f
AA		 3333/* Reset the the nfs_read_data to send the read to the MDS. */
3334void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3335{
3336 dprintk("%s Reset task for i/o through\n", __func__);
3337 put_lseg(data->lseg);
3338 data->lseg = NULL;
3339 /* offsets will differ in the dense stripe case */
3340 data->args.offset = data->mds_offset;
3341 data->ds_clp = NULL;
3342 data->args.fh = NFS_FH(data->inode);
3343 data->read_done_cb = nfs4_read_done_cb;
3344 task->tk_ops = data->mds_ops;
3345 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3346}
3347EXPORT_SYMBOL_GPL(nfs4_reset_read);
3348
b029bc9b 3349static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3350{
1da177e4
LT		 3351 struct inode *inode = data->inode;
3352
9e33bed5 3353 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3354 rpc_restart_call_prepare(task);
788e7a89 3355 return -EAGAIN;
1da177e4 3356 }
4f9838c7 3357 if (task->tk_status >= 0) {
1da177e4 3358 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3359 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3360 }
788e7a89 3361 return 0;
1da177e4
LT		 3362}
3363
b029bc9b
FI		 3364static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3365{
3366 if (!nfs4_sequence_done(task, &data->res.seq_res))
3367 return -EAGAIN;
d20581aa
BH		 3368 return data->write_done_cb ? data->write_done_cb(task, data) :
3369 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3370}
3371
a69aef14
FI		 3372/* Reset the the nfs_write_data to send the write to the MDS. */
3373void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3374{
3375 dprintk("%s Reset task for i/o through\n", __func__);
3376 put_lseg(data->lseg);
3377 data->lseg = NULL;
3378 data->ds_clp = NULL;
3379 data->write_done_cb = nfs4_write_done_cb;
3380 data->args.fh = NFS_FH(data->inode);
3381 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3382 data->args.offset = data->mds_offset;
3383 data->res.fattr = &data->fattr;
3384 task->tk_ops = data->mds_ops;
3385 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3386}
3387EXPORT_SYMBOL_GPL(nfs4_reset_write);
3388
bdc7f021 3389static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3390{
bdc7f021
TM		 3391 struct nfs_server *server = NFS_SERVER(data->inode);
3392
7ffd1064
FI		 3393 if (data->lseg) {
3394 data->args.bitmask = NULL;
3395 data->res.fattr = NULL;
3396 } else
3397 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3398 if (!data->write_done_cb)
3399 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3400 data->res.server = server;
1da177e4
LT		 3401 data->timestamp = jiffies;
3402
bdc7f021 3403 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3404 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3405}
3406
c6cb80d0
BS		 3407static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3408{
3409 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3410 &data->args.seq_args,
3411 &data->res.seq_res,
3412 task))
3413 return;
3414 rpc_call_start(task);
1da177e4
LT		 3415}
3416
5f452431 3417static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3418{
1da177e4 3419 struct inode *inode = data->inode;
14516c3a 3420
9e33bed5 3421 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3422 rpc_restart_call_prepare(task);
788e7a89 3423 return -EAGAIN;
1da177e4 3424 }
9e08a3c5 3425 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3426 return 0;
1da177e4
LT		 3427}
3428
5f452431
FI		 3429static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3430{
3431 if (!nfs4_sequence_done(task, &data->res.seq_res))
3432 return -EAGAIN;
3433 return data->write_done_cb(task, data);
3434}
3435
bdc7f021 3436static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3437{
788e7a89 3438 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3439
3440 if (data->lseg) {
3441 data->args.bitmask = NULL;
3442 data->res.fattr = NULL;
3443 } else
3444 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3445 if (!data->write_done_cb)
3446 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3447 data->res.server = server;
bdc7f021 3448 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3449 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3450}
3451
9bc4e3ca
CL		 3452struct nfs4_renewdata {
3453 struct nfs_client *client;
3454 unsigned long timestamp;
3455};
3456
1da177e4
LT		 3457/*
3458 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3459 * standalone procedure for queueing an asynchronous RENEW.
3460 */
9bc4e3ca 3461static void nfs4_renew_release(void *calldata)
dc96aef9 3462{
9bc4e3ca
CL		 3463 struct nfs4_renewdata *data = calldata;
3464 struct nfs_client *clp = data->client;
dc96aef9 3465
0851de06
AB		 3466 if (atomic_read(&clp->cl_count) > 1)
3467 nfs4_schedule_state_renewal(clp);
3468 nfs_put_client(clp);
9bc4e3ca 3469 kfree(data);
dc96aef9
AB		 3470}
3471
9bc4e3ca 3472static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3473{
9bc4e3ca
CL		 3474 struct nfs4_renewdata *data = calldata;
3475 struct nfs_client *clp = data->client;
3476 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3477
3478 if (task->tk_status < 0) {
95baa25c 3479 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3480 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3481 return;
3482 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3483 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3484 return;
3485 }
3486 nfs4_schedule_path_down_recovery(clp);
1da177e4 3487 }
452e9352 3488 do_renew_lease(clp, timestamp);
1da177e4
LT		 3489}
3490
963d8fe5
TM		 3491static const struct rpc_call_ops nfs4_renew_ops = {
3492 .rpc_call_done = nfs4_renew_done,
dc96aef9 3493 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3494};
3495
2f60ea6b 3496static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3497{
3498 struct rpc_message msg = {
3499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3500 .rpc_argp = clp,
b4454fe1 3501 .rpc_cred = cred,
1da177e4 3502 };
9bc4e3ca 3503 struct nfs4_renewdata *data;
1da177e4 3504
2f60ea6b
TM		 3505 if (renew_flags == 0)
3506 return 0;
0851de06
AB		 3507 if (!atomic_inc_not_zero(&clp->cl_count))
3508 return -EIO;
b569ad34 3509 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3510 if (data == NULL)
3511 return -ENOMEM;
3512 data->client = clp;
3513 data->timestamp = jiffies;
1da177e4 3514 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3515 &nfs4_renew_ops, data);
1da177e4
LT		 3516}
3517
8534d4ec 3518static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3519{
3520 struct rpc_message msg = {
3521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3522 .rpc_argp = clp,
b4454fe1 3523 .rpc_cred = cred,
1da177e4
LT		 3524 };
3525 unsigned long now = jiffies;
3526 int status;
3527
3528 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3529 if (status < 0)
3530 return status;
452e9352 3531 do_renew_lease(clp, now);
1da177e4
LT		 3532 return 0;
3533}
3534
aa1870af
BF		 3535static inline int nfs4_server_supports_acls(struct nfs_server *server)
3536{
3537 return (server->caps & NFS_CAP_ACLS)
3538 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3539 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3540}
3541
3542/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3543 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3544 * the stack.
3545 */
3546#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3547
e9e3d724
NH		 3548static int buf_to_pages_noslab(const void *buf, size_t buflen,
3549 struct page **pages, unsigned int *pgbase)
3550{
3551 struct page *newpage, **spages;
3552 int rc = 0;
3553 size_t len;
3554 spages = pages;
3555
3556 do {
43b7c3f0 3557 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3558 newpage = alloc_page(GFP_KERNEL);
3559
3560 if (newpage == NULL)
3561 goto unwind;
3562 memcpy(page_address(newpage), buf, len);
3563 buf += len;
3564 buflen -= len;
3565 *pages++ = newpage;
3566 rc++;
3567 } while (buflen != 0);
3568
3569 return rc;
3570
3571unwind:
3572 for(; rc > 0; rc--)
3573 __free_page(spages[rc-1]);
3574 return -ENOMEM;
3575}
3576
e50a1c2e
BF		 3577struct nfs4_cached_acl {
3578 int cached;
3579 size_t len;
3e9d4154 3580 char data[0];
e50a1c2e
BF		 3581};
3582
3583static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3584{
3585 struct nfs_inode *nfsi = NFS_I(inode);
3586
3587 spin_lock(&inode->i_lock);
3588 kfree(nfsi->nfs4_acl);
3589 nfsi->nfs4_acl = acl;
3590 spin_unlock(&inode->i_lock);
3591}
3592
3593static void nfs4_zap_acl_attr(struct inode *inode)
3594{
3595 nfs4_set_cached_acl(inode, NULL);
3596}
3597
3598static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3599{
3600 struct nfs_inode *nfsi = NFS_I(inode);
3601 struct nfs4_cached_acl *acl;
3602 int ret = -ENOENT;
3603
3604 spin_lock(&inode->i_lock);
3605 acl = nfsi->nfs4_acl;
3606 if (acl == NULL)
3607 goto out;
3608 if (buf == NULL) /* user is just asking for length */
3609 goto out_len;
3610 if (acl->cached == 0)
3611 goto out;
3612 ret = -ERANGE; /* see getxattr(2) man page */
3613 if (acl->len > buflen)
3614 goto out;
3615 memcpy(buf, acl->data, acl->len);
3616out_len:
3617 ret = acl->len;
3618out:
3619 spin_unlock(&inode->i_lock);
3620 return ret;
3621}
3622
3623static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3624{
3625 struct nfs4_cached_acl *acl;
3626
3627 if (buf && acl_len <= PAGE_SIZE) {
3628 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3629 if (acl == NULL)
3630 goto out;
3631 acl->cached = 1;
3632 memcpy(acl->data, buf, acl_len);
3633 } else {
3634 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3635 if (acl == NULL)
3636 goto out;
3637 acl->cached = 0;
3638 }
3639 acl->len = acl_len;
3640out:
3641 nfs4_set_cached_acl(inode, acl);
3642}
3643
bf118a34
AA		 3644/*
3645 * The getxattr API returns the required buffer length when called with a
3646 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3647 * the required buf. On a NULL buf, we send a page of data to the server
3648 * guessing that the ACL request can be serviced by a page. If so, we cache
3649 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3650 * the cache. If not so, we throw away the page, and cache the required
3651 * length. The next getxattr call will then produce another round trip to
3652 * the server, this time with the input buf of the required size.
3653 */
16b4289c 3654static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3655{
bf118a34 3656 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3657 struct nfs_getaclargs args = {
3658 .fh = NFS_FH(inode),
3659 .acl_pages = pages,
3660 .acl_len = buflen,
3661 };
663c79b3
BH		 3662 struct nfs_getaclres res = {
3663 .acl_len = buflen,
3664 };
e50a1c2e 3665 void *resp_buf;
aa1870af
BF		 3666 struct rpc_message msg = {
3667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3668 .rpc_argp = &args,
663c79b3 3669 .rpc_resp = &res,
aa1870af 3670 };
bf118a34 3671 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3672
bf118a34
AA		 3673 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3674 /* As long as we're doing a round trip to the server anyway,
3675 * let's be prepared for a page of acl data. */
3676 if (npages == 0)
3677 npages = 1;
3678
3679 for (i = 0; i < npages; i++) {
3680 pages[i] = alloc_page(GFP_KERNEL);
3681 if (!pages[i])
3682 goto out_free;
e50a1c2e 3683 }
bf118a34
AA		 3684 if (npages > 1) {
3685 /* for decoding across pages */
331818f1
TM		 3686 res.acl_scratch = alloc_page(GFP_KERNEL);
3687 if (!res.acl_scratch)
bf118a34 3688 goto out_free;
e50a1c2e 3689 }
bf118a34
AA		 3690 args.acl_len = npages * PAGE_SIZE;
3691 args.acl_pgbase = 0;
3692 /* Let decode_getfacl know not to fail if the ACL data is larger than
3693 * the page we send as a guess */
3694 if (buf == NULL)
3695 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3696 resp_buf = page_address(pages[0]);
3697
de040bec 3698 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3699 __func__, buf, buflen, npages, args.acl_len);
3700 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3701 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3702 if (ret)
3703 goto out_free;
bf118a34
AA		 3704
3705 acl_len = res.acl_len - res.acl_data_offset;
3706 if (acl_len > args.acl_len)
3707 nfs4_write_cached_acl(inode, NULL, acl_len);
e50a1c2e 3708 else
bf118a34
AA		 3709 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3710 acl_len);
e50a1c2e
BF		 3711 if (buf) {
3712 ret = -ERANGE;
bf118a34 3713 if (acl_len > buflen)
e50a1c2e 3714 goto out_free;
bf118a34 3715 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3716 acl_len);
e50a1c2e 3717 }
bf118a34 3718 ret = acl_len;
e50a1c2e 3719out_free:
bf118a34
AA		 3720 for (i = 0; i < npages; i++)
3721 if (pages[i])
3722 __free_page(pages[i]);
331818f1
TM		 3723 if (res.acl_scratch)
3724 __free_page(res.acl_scratch);
aa1870af
BF		 3725 return ret;
3726}
3727
16b4289c
TM		 3728static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3729{
3730 struct nfs4_exception exception = { };
3731 ssize_t ret;
3732 do {
3733 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3734 if (ret >= 0)
3735 break;
3736 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3737 } while (exception.retry);
3738 return ret;
3739}
3740
e50a1c2e
BF		 3741static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3742{
3743 struct nfs_server *server = NFS_SERVER(inode);
3744 int ret;
3745
3746 if (!nfs4_server_supports_acls(server))
3747 return -EOPNOTSUPP;
3748 ret = nfs_revalidate_inode(server, inode);
3749 if (ret < 0)
3750 return ret;
08a22b39
AK		 3751 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3752 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3753 ret = nfs4_read_cached_acl(inode, buf, buflen);
3754 if (ret != -ENOENT)
bf118a34
AA		 3755 /* -ENOENT is returned if there is no ACL or if there is an ACL
3756 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3757 return ret;
3758 return nfs4_get_acl_uncached(inode, buf, buflen);
3759}
3760
16b4289c 3761static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3762{
3763 struct nfs_server *server = NFS_SERVER(inode);
3764 struct page *pages[NFS4ACL_MAXPAGES];
3765 struct nfs_setaclargs arg = {
3766 .fh = NFS_FH(inode),
3767 .acl_pages = pages,
3768 .acl_len = buflen,
3769 };
73c403a9 3770 struct nfs_setaclres res;
4b580ee3
BF		 3771 struct rpc_message msg = {
3772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3773 .rpc_argp = &arg,
73c403a9 3774 .rpc_resp = &res,
4b580ee3 3775 };
e9e3d724 3776 int ret, i;
4b580ee3
BF		 3777
3778 if (!nfs4_server_supports_acls(server))
3779 return -EOPNOTSUPP;
e9e3d724
NH		 3780 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3781 if (i < 0)
3782 return i;
642ac549 3783 nfs_inode_return_delegation(inode);
7c513058 3784 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3785
3786 /*
3787 * Free each page after tx, so the only ref left is
3788 * held by the network stack
3789 */
3790 for (; i > 0; i--)
3791 put_page(pages[i-1]);
3792
08a22b39
AK		 3793 /*
3794 * Acl update can result in inode attribute update.
3795 * so mark the attribute cache invalid.
3796 */
3797 spin_lock(&inode->i_lock);
3798 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3799 spin_unlock(&inode->i_lock);
f41f7418
TM		 3800 nfs_access_zap_cache(inode);
3801 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3802 return ret;
3803}
3804
16b4289c
TM		 3805static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3806{
3807 struct nfs4_exception exception = { };
3808 int err;
3809 do {
3810 err = nfs4_handle_exception(NFS_SERVER(inode),
3811 __nfs4_proc_set_acl(inode, buf, buflen),
3812 &exception);
3813 } while (exception.retry);
3814 return err;
3815}
3816
1da177e4 3817static int
aa5190d0 3818nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3819{
aa5190d0
TM		 3820 struct nfs_client *clp = server->nfs_client;
3821
3822 if (task->tk_status >= 0)
1da177e4
LT		 3823 return 0;
3824 switch(task->tk_status) {
a1d0b5ee 3825 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3826 case -NFS4ERR_ADMIN_REVOKED:
3827 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 3828 if (state != NULL)
3829 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3830 case -NFS4ERR_OPENMODE:
3831 if (state == NULL)
3832 break;
0400a6b0
TM		 3833 nfs4_schedule_stateid_recovery(server, state);
3834 goto wait_on_recovery;
0ced63d1
TM		 3835 case -NFS4ERR_EXPIRED:
3836 if (state != NULL)
3837 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3838 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3839 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3840 nfs4_schedule_lease_recovery(clp);
3841 goto wait_on_recovery;
4745e315
AA		 3842#if defined(CONFIG_NFS_V4_1)
3843 case -NFS4ERR_BADSESSION:
3844 case -NFS4ERR_BADSLOT:
3845 case -NFS4ERR_BAD_HIGH_SLOT:
3846 case -NFS4ERR_DEADSESSION:
3847 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3848 case -NFS4ERR_SEQ_FALSE_RETRY:
3849 case -NFS4ERR_SEQ_MISORDERED:
3850 dprintk("%s ERROR %d, Reset session\n", __func__,
3851 task->tk_status);
0400a6b0 3852 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3853 task->tk_status = 0;
3854 return -EAGAIN;
3855#endif /* CONFIG_NFS_V4_1 */
1da177e4 3856 case -NFS4ERR_DELAY:
aa5190d0 3857 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3858 case -NFS4ERR_GRACE:
2c643488 3859 case -EKEYEXPIRED:
1da177e4
LT		 3860 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3861 task->tk_status = 0;
3862 return -EAGAIN;
a8a4ae3a 3863 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3864 case -NFS4ERR_OLD_STATEID:
3865 task->tk_status = 0;
3866 return -EAGAIN;
3867 }
3868 task->tk_status = nfs4_map_errors(task->tk_status);
3869 return 0;
0400a6b0 3870wait_on_recovery:
a2c0b9e2 3871 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3872 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3873 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3874 task->tk_status = 0;
3875 return -EAGAIN;
1da177e4
LT		 3876}
3877
cd93710e
CL		 3878static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3879 nfs4_verifier *bootverf)
3880{
3881 __be32 verf[2];
3882
3883 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3884 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3885 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3886}
3887
bb8b27e5
TM		 3888int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3889 unsigned short port, struct rpc_cred *cred,
3890 struct nfs4_setclientid_res *res)
1da177e4
LT		 3891{
3892 nfs4_verifier sc_verifier;
3893 struct nfs4_setclientid setclientid = {
3894 .sc_verifier = &sc_verifier,
3895 .sc_prog = program,
f4eecd5d 3896 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3897 };
3898 struct rpc_message msg = {
3899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3900 .rpc_argp = &setclientid,
bb8b27e5 3901 .rpc_resp = res,
286d7d6a 3902 .rpc_cred = cred,
1da177e4 3903 };
1da177e4
LT		 3904 int loop = 0;
3905 int status;
3906
cd93710e 3907 nfs4_construct_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3908
3909 for(;;) {
2446ab60 3910 rcu_read_lock();
1da177e4 3911 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3912 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3913 clp->cl_ipaddr,
3914 rpc_peeraddr2str(clp->cl_rpcclient,
3915 RPC_DISPLAY_ADDR),
69dd716c
TM		 3916 rpc_peeraddr2str(clp->cl_rpcclient,
3917 RPC_DISPLAY_PROTO),
78ea323b 3918 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3919 clp->cl_id_uniquifier);
3920 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3921 sizeof(setclientid.sc_netid),
3922 rpc_peeraddr2str(clp->cl_rpcclient,
3923 RPC_DISPLAY_NETID));
1da177e4 3924 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3925 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 3926 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 3927 rcu_read_unlock();
1da177e4 3928
1bd714f2 3929 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3930 if (status != -NFS4ERR_CLID_INUSE)
3931 break;
fd954ae1
TM		 3932 if (loop != 0) {
3933 ++clp->cl_id_uniquifier;
1da177e4 3934 break;
fd954ae1
TM		 3935 }
3936 ++loop;
3937 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3938 }
3939 return status;
3940}
3941
fd954ae1 3942int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3943 struct nfs4_setclientid_res *arg,
3944 struct rpc_cred *cred)
1da177e4
LT		 3945{
3946 struct nfs_fsinfo fsinfo;
3947 struct rpc_message msg = {
3948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3949 .rpc_argp = arg,
1da177e4 3950 .rpc_resp = &fsinfo,
286d7d6a 3951 .rpc_cred = cred,
1da177e4
LT		 3952 };
3953 unsigned long now;
3954 int status;
3955
3956 now = jiffies;
1bd714f2 3957 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3958 if (status == 0) {
3959 spin_lock(&clp->cl_lock);
3960 clp->cl_lease_time = fsinfo.lease_time * HZ;
3961 clp->cl_last_renewal = now;
3962 spin_unlock(&clp->cl_lock);
3963 }
3964 return status;
3965}
3966
fe650407
TM		 3967struct nfs4_delegreturndata {
3968 struct nfs4_delegreturnargs args;
fa178f29 3969 struct nfs4_delegreturnres res;
fe650407
TM		 3970 struct nfs_fh fh;
3971 nfs4_stateid stateid;
26e976a8 3972 unsigned long timestamp;
fa178f29 3973 struct nfs_fattr fattr;
fe650407
TM		 3974 int rpc_status;
3975};
3976
fe650407
TM		 3977static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3978{
3979 struct nfs4_delegreturndata *data = calldata;
938e1010 3980
14516c3a
TM		 3981 if (!nfs4_sequence_done(task, &data->res.seq_res))
3982 return;
938e1010 3983
79708861
RL		 3984 switch (task->tk_status) {
3985 case -NFS4ERR_STALE_STATEID:
3986 case -NFS4ERR_EXPIRED:
3987 case 0:
fa178f29 3988 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3989 break;
3990 default:
3991 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3992 -EAGAIN) {
d00c5d43 3993 rpc_restart_call_prepare(task);
79708861
RL		 3994 return;
3995 }
3996 }
3997 data->rpc_status = task->tk_status;
fe650407
TM		 3998}
3999
4000static void nfs4_delegreturn_release(void *calldata)
4001{
fe650407
TM		 4002 kfree(calldata);
4003}
4004
938e1010
AA		 4005#if defined(CONFIG_NFS_V4_1)
4006static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4007{
4008 struct nfs4_delegreturndata *d_data;
4009
4010 d_data = (struct nfs4_delegreturndata *)data;
4011
035168ab 4012 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4013 &d_data->args.seq_args,
9d12b216 4014 &d_data->res.seq_res, task))
938e1010
AA		 4015 return;
4016 rpc_call_start(task);
4017}
4018#endif /* CONFIG_NFS_V4_1 */
4019
c8d149f3 4020static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4021#if defined(CONFIG_NFS_V4_1)
4022 .rpc_call_prepare = nfs4_delegreturn_prepare,
4023#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4024 .rpc_call_done = nfs4_delegreturn_done,
4025 .rpc_release = nfs4_delegreturn_release,
4026};
4027
e6f81075 4028static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4029{
4030 struct nfs4_delegreturndata *data;
fa178f29 4031 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4032 struct rpc_task *task;
5138fde0
TM		 4033 struct rpc_message msg = {
4034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4035 .rpc_cred = cred,
4036 };
c970aa85
TM		 4037 struct rpc_task_setup task_setup_data = {
4038 .rpc_client = server->client,
5138fde0 4039 .rpc_message = &msg,
c970aa85
TM		 4040 .callback_ops = &nfs4_delegreturn_ops,
4041 .flags = RPC_TASK_ASYNC,
4042 };
e6f81075 4043 int status = 0;
fe650407 4044
8535b2be 4045 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4046 if (data == NULL)
4047 return -ENOMEM;
9d12b216 4048 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4049 data->args.fhandle = &data->fh;
4050 data->args.stateid = &data->stateid;
fa178f29 4051 data->args.bitmask = server->attr_bitmask;
fe650407 4052 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4053 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4054 data->res.fattr = &data->fattr;
4055 data->res.server = server;
5138fde0 4056 nfs_fattr_init(data->res.fattr);
26e976a8 4057 data->timestamp = jiffies;
fe650407
TM		 4058 data->rpc_status = 0;
4059
c970aa85 4060 task_setup_data.callback_data = data;
1174dd1f
TM		 4061 msg.rpc_argp = &data->args;
4062 msg.rpc_resp = &data->res;
c970aa85 4063 task = rpc_run_task(&task_setup_data);
7a1218a2 4064 if (IS_ERR(task))
fe650407 4065 return PTR_ERR(task);
e6f81075
TM		 4066 if (!issync)
4067 goto out;
fe650407 4068 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4069 if (status != 0)
4070 goto out;
4071 status = data->rpc_status;
4072 if (status != 0)
4073 goto out;
4074 nfs_refresh_inode(inode, &data->fattr);
4075out:
e6b3c4db 4076 rpc_put_task(task);
fe650407 4077 return status;
1da177e4
LT		 4078}
4079
e6f81075 4080int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4081{
4082 struct nfs_server *server = NFS_SERVER(inode);
4083 struct nfs4_exception exception = { };
4084 int err;
4085 do {
e6f81075 4086 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4087 switch (err) {
4088 case -NFS4ERR_STALE_STATEID:
4089 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4090 case 0:
4091 return 0;
4092 }
4093 err = nfs4_handle_exception(server, err, &exception);
4094 } while (exception.retry);
4095 return err;
4096}
4097
4098#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4099#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4100
4101/*
4102 * sleep, with exponential backoff, and retry the LOCK operation.
4103 */
4104static unsigned long
4105nfs4_set_lock_task_retry(unsigned long timeout)
4106{
d310310c 4107 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4108 timeout <<= 1;
4109 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4110 return NFS4_LOCK_MAXTIMEOUT;
4111 return timeout;
4112}
4113
1da177e4
LT		 4114static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4115{
4116 struct inode *inode = state->inode;
4117 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4118 struct nfs_client *clp = server->nfs_client;
911d1aaf 4119 struct nfs_lockt_args arg = {
1da177e4 4120 .fh = NFS_FH(inode),
911d1aaf 4121 .fl = request,
1da177e4 4122 };
911d1aaf
TM		 4123 struct nfs_lockt_res res = {
4124 .denied = request,
1da177e4
LT		 4125 };
4126 struct rpc_message msg = {
4127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4128 .rpc_argp = &arg,
4129 .rpc_resp = &res,
4130 .rpc_cred = state->owner->so_cred,
4131 };
1da177e4
LT		 4132 struct nfs4_lock_state *lsp;
4133 int status;
4134
911d1aaf 4135 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4136 status = nfs4_set_lock_state(state, request);
4137 if (status != 0)
4138 goto out;
4139 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4140 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4141 arg.lock_owner.s_dev = server->s_dev;
7c513058 4142 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4143 switch (status) {
4144 case 0:
4145 request->fl_type = F_UNLCK;
4146 break;
4147 case -NFS4ERR_DENIED:
4148 status = 0;
1da177e4 4149 }
70cc6487 4150 request->fl_ops->fl_release_private(request);
8d0a8a9d 4151out:
1da177e4
LT		 4152 return status;
4153}
4154
4155static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4156{
4157 struct nfs4_exception exception = { };
4158 int err;
4159
4160 do {
4161 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4162 _nfs4_proc_getlk(state, cmd, request),
4163 &exception);
4164 } while (exception.retry);
4165 return err;
4166}
4167
4168static int do_vfs_lock(struct file *file, struct file_lock *fl)
4169{
4170 int res = 0;
4171 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4172 case FL_POSIX:
4173 res = posix_lock_file_wait(file, fl);
4174 break;
4175 case FL_FLOCK:
4176 res = flock_lock_file_wait(file, fl);
4177 break;
4178 default:
4179 BUG();
4180 }
1da177e4
LT		 4181 return res;
4182}
4183
faf5f49c 4184struct nfs4_unlockdata {
911d1aaf
TM		 4185 struct nfs_locku_args arg;
4186 struct nfs_locku_res res;
faf5f49c
TM		 4187 struct nfs4_lock_state *lsp;
4188 struct nfs_open_context *ctx;
911d1aaf
TM		 4189 struct file_lock fl;
4190 const struct nfs_server *server;
26e976a8 4191 unsigned long timestamp;
faf5f49c
TM		 4192};
4193
911d1aaf
TM		 4194static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4195 struct nfs_open_context *ctx,
4196 struct nfs4_lock_state *lsp,
4197 struct nfs_seqid *seqid)
4198{
4199 struct nfs4_unlockdata *p;
4200 struct inode *inode = lsp->ls_state->inode;
4201
8535b2be 4202 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4203 if (p == NULL)
4204 return NULL;
4205 p->arg.fh = NFS_FH(inode);
4206 p->arg.fl = &p->fl;
4207 p->arg.seqid = seqid;
c1d51931 4208 p->res.seqid = seqid;
911d1aaf
TM		 4209 p->arg.stateid = &lsp->ls_stateid;
4210 p->lsp = lsp;
4211 atomic_inc(&lsp->ls_count);
4212 /* Ensure we don't close file until we're done freeing locks! */
4213 p->ctx = get_nfs_open_context(ctx);
4214 memcpy(&p->fl, fl, sizeof(p->fl));
4215 p->server = NFS_SERVER(inode);
4216 return p;
4217}
4218
06f814a3 4219static void nfs4_locku_release_calldata(void *data)
faf5f49c 4220{
963d8fe5 4221 struct nfs4_unlockdata *calldata = data;
911d1aaf 4222 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4223 nfs4_put_lock_state(calldata->lsp);
4224 put_nfs_open_context(calldata->ctx);
4225 kfree(calldata);
faf5f49c
TM		 4226}
4227
963d8fe5 4228static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4229{
963d8fe5 4230 struct nfs4_unlockdata *calldata = data;
faf5f49c 4231
14516c3a
TM		 4232 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4233 return;
faf5f49c
TM		 4234 switch (task->tk_status) {
4235 case 0:
f597c537
TM		 4236 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4237 &calldata->res.stateid);
26e976a8 4238 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4239 break;
9e33bed5
TM		 4240 case -NFS4ERR_BAD_STATEID:
4241 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4242 case -NFS4ERR_STALE_STATEID:
4243 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4244 break;
4245 default:
9e33bed5 4246 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4247 rpc_restart_call_prepare(task);
faf5f49c 4248 }
faf5f49c
TM		 4249}
4250
4ce70ada 4251static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4252{
4ce70ada 4253 struct nfs4_unlockdata *calldata = data;
faf5f49c 4254
911d1aaf 4255 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4256 return;
4257 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4258 /* Note: exit _without_ running nfs4_locku_done */
4259 task->tk_action = NULL;
faf5f49c
TM		 4260 return;
4261 }
26e976a8 4262 calldata->timestamp = jiffies;
035168ab 4263 if (nfs4_setup_sequence(calldata->server,
a893693c 4264 &calldata->arg.seq_args,
9d12b216 4265 &calldata->res.seq_res, task))
a893693c 4266 return;
5138fde0 4267 rpc_call_start(task);
faf5f49c
TM		 4268}
4269
963d8fe5 4270static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4271 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4272 .rpc_call_done = nfs4_locku_done,
06f814a3 4273 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4274};
4275
a5d16a4d
TM		 4276static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4277 struct nfs_open_context *ctx,
4278 struct nfs4_lock_state *lsp,
4279 struct nfs_seqid *seqid)
4280{
4281 struct nfs4_unlockdata *data;
5138fde0
TM		 4282 struct rpc_message msg = {
4283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4284 .rpc_cred = ctx->cred,
4285 };
c970aa85
TM		 4286 struct rpc_task_setup task_setup_data = {
4287 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4288 .rpc_message = &msg,
c970aa85 4289 .callback_ops = &nfs4_locku_ops,
101070ca 4290 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4291 .flags = RPC_TASK_ASYNC,
4292 };
a5d16a4d 4293
137d6aca
FF		 4294 /* Ensure this is an unlock - when canceling a lock, the
4295 * canceled lock is passed in, and it won't be an unlock.
4296 */
4297 fl->fl_type = F_UNLCK;
4298
a5d16a4d
TM		 4299 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4300 if (data == NULL) {
4301 nfs_free_seqid(seqid);
4302 return ERR_PTR(-ENOMEM);
4303 }
4304
9d12b216 4305 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4306 msg.rpc_argp = &data->arg;
4307 msg.rpc_resp = &data->res;
c970aa85
TM		 4308 task_setup_data.callback_data = data;
4309 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4310}
4311
faf5f49c
TM		 4312static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4313{
19e03c57 4314 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4315 struct nfs_seqid *seqid;
1da177e4 4316 struct nfs4_lock_state *lsp;
06f814a3
TM		 4317 struct rpc_task *task;
4318 int status = 0;
536ff0f8 4319 unsigned char fl_flags = request->fl_flags;
faf5f49c 4320
8d0a8a9d 4321 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4322 /* Unlock _before_ we do the RPC call */
4323 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4324 down_read(&nfsi->rwsem);
4325 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4326 up_read(&nfsi->rwsem);
9b073574 4327 goto out;
19e03c57
TM		 4328 }
4329 up_read(&nfsi->rwsem);
8d0a8a9d 4330 if (status != 0)
9b073574
TM		 4331 goto out;
4332 /* Is this a delegated lock? */
4333 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4334 goto out;
8d0a8a9d 4335 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4336 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4337 status = -ENOMEM;
911d1aaf 4338 if (seqid == NULL)
9b073574 4339 goto out;
cd3758e3 4340 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4341 status = PTR_ERR(task);
4342 if (IS_ERR(task))
9b073574 4343 goto out;
a5d16a4d 4344 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4345 rpc_put_task(task);
9b073574 4346out:
536ff0f8 4347 request->fl_flags = fl_flags;
1da177e4
LT		 4348 return status;
4349}
4350
a5d16a4d
TM		 4351struct nfs4_lockdata {
4352 struct nfs_lock_args arg;
4353 struct nfs_lock_res res;
4354 struct nfs4_lock_state *lsp;
4355 struct nfs_open_context *ctx;
4356 struct file_lock fl;
26e976a8 4357 unsigned long timestamp;
a5d16a4d
TM		 4358 int rpc_status;
4359 int cancelled;
66179efe 4360 struct nfs_server *server;
a5d16a4d
TM		 4361};
4362
4363static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4364 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4365 gfp_t gfp_mask)
1da177e4 4366{
a5d16a4d
TM		 4367 struct nfs4_lockdata *p;
4368 struct inode *inode = lsp->ls_state->inode;
1da177e4 4369 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4370
8535b2be 4371 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4372 if (p == NULL)
4373 return NULL;
4374
4375 p->arg.fh = NFS_FH(inode);
4376 p->arg.fl = &p->fl;
8535b2be 4377 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4378 if (p->arg.open_seqid == NULL)
4379 goto out_free;
8535b2be 4380 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4381 if (p->arg.lock_seqid == NULL)
2f74c0a0 4382 goto out_free_seqid;
a5d16a4d 4383 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4384 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4385 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4386 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4387 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4388 p->lsp = lsp;
66179efe 4389 p->server = server;
a5d16a4d
TM		 4390 atomic_inc(&lsp->ls_count);
4391 p->ctx = get_nfs_open_context(ctx);
4392 memcpy(&p->fl, fl, sizeof(p->fl));
4393 return p;
2f74c0a0
TM		 4394out_free_seqid:
4395 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4396out_free:
4397 kfree(p);
4398 return NULL;
4399}
4400
4401static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4402{
4403 struct nfs4_lockdata *data = calldata;
4404 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4405
3110ff80 4406 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4407 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4408 return;
a5d16a4d
TM		 4409 /* Do we need to do an open_to_lock_owner? */
4410 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4411 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4412 return;
a5d16a4d
TM		 4413 data->arg.open_stateid = &state->stateid;
4414 data->arg.new_lock_owner = 1;
c1d51931 4415 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4416 } else
4417 data->arg.new_lock_owner = 0;
26e976a8 4418 data->timestamp = jiffies;
035168ab
TM		 4419 if (nfs4_setup_sequence(data->server,
4420 &data->arg.seq_args,
9d12b216 4421 &data->res.seq_res, task))
66179efe 4422 return;
5138fde0 4423 rpc_call_start(task);
3110ff80 4424 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4425}
4426
b257957e
AB		 4427static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4428{
4429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4430 nfs4_lock_prepare(task, calldata);
4431}
4432
a5d16a4d
TM		 4433static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4434{
4435 struct nfs4_lockdata *data = calldata;
4436
3110ff80 4437 dprintk("%s: begin!\n", __func__);
a5d16a4d 4438
14516c3a
TM		 4439 if (!nfs4_sequence_done(task, &data->res.seq_res))
4440 return;
66179efe 4441
a5d16a4d 4442 data->rpc_status = task->tk_status;
a5d16a4d 4443 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4444 if (data->rpc_status == 0)
4445 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4446 else
4447 goto out;
4448 }
4449 if (data->rpc_status == 0) {
f597c537 4450 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4451 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4452 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4453 }
a5d16a4d 4454out:
3110ff80 4455 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4456}
4457
4458static void nfs4_lock_release(void *calldata)
4459{
4460 struct nfs4_lockdata *data = calldata;
4461
3110ff80 4462 dprintk("%s: begin!\n", __func__);
2f74c0a0 4463 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4464 if (data->cancelled != 0) {
4465 struct rpc_task *task;
4466 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4467 data->arg.lock_seqid);
4468 if (!IS_ERR(task))
bf294b41 4469 rpc_put_task_async(task);
3110ff80 4470 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4471 } else
4472 nfs_free_seqid(data->arg.lock_seqid);
4473 nfs4_put_lock_state(data->lsp);
4474 put_nfs_open_context(data->ctx);
4475 kfree(data);
3110ff80 4476 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4477}
4478
4479static const struct rpc_call_ops nfs4_lock_ops = {
4480 .rpc_call_prepare = nfs4_lock_prepare,
4481 .rpc_call_done = nfs4_lock_done,
4482 .rpc_release = nfs4_lock_release,
4483};
4484
b257957e
AB		 4485static const struct rpc_call_ops nfs4_recover_lock_ops = {
4486 .rpc_call_prepare = nfs4_recover_lock_prepare,
4487 .rpc_call_done = nfs4_lock_done,
4488 .rpc_release = nfs4_lock_release,
4489};
4490
2bee72a6
TM		 4491static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4492{
2bee72a6
TM		 4493 switch (error) {
4494 case -NFS4ERR_ADMIN_REVOKED:
4495 case -NFS4ERR_BAD_STATEID:
ecac799a 4496 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4497 if (new_lock_owner != 0 ||
4498 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4499 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4500 break;
4501 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4502 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4503 case -NFS4ERR_EXPIRED:
4504 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4505 };
4506}
4507
afe6c27c 4508static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4509{
4510 struct nfs4_lockdata *data;
4511 struct rpc_task *task;
5138fde0
TM		 4512 struct rpc_message msg = {
4513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4514 .rpc_cred = state->owner->so_cred,
4515 };
c970aa85
TM		 4516 struct rpc_task_setup task_setup_data = {
4517 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4518 .rpc_message = &msg,
c970aa85 4519 .callback_ops = &nfs4_lock_ops,
101070ca 4520 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4521 .flags = RPC_TASK_ASYNC,
4522 };
a5d16a4d
TM		 4523 int ret;
4524
3110ff80 4525 dprintk("%s: begin!\n", __func__);
cd3758e3 4526 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4527 fl->fl_u.nfs4_fl.owner,
4528 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4529 if (data == NULL)
4530 return -ENOMEM;
4531 if (IS_SETLKW(cmd))
4532 data->arg.block = 1;
b257957e
AB		 4533 if (recovery_type > NFS_LOCK_NEW) {
4534 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4535 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4536 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4537 }
9d12b216 4538 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4539 msg.rpc_argp = &data->arg;
4540 msg.rpc_resp = &data->res;
c970aa85
TM		 4541 task_setup_data.callback_data = data;
4542 task = rpc_run_task(&task_setup_data);
7a1218a2 4543 if (IS_ERR(task))
a5d16a4d 4544 return PTR_ERR(task);
a5d16a4d
TM		 4545 ret = nfs4_wait_for_completion_rpc_task(task);
4546 if (ret == 0) {
4547 ret = data->rpc_status;
2bee72a6
TM		 4548 if (ret)
4549 nfs4_handle_setlk_error(data->server, data->lsp,
4550 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4551 } else
4552 data->cancelled = 1;
e6b3c4db 4553 rpc_put_task(task);
3110ff80 4554 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4555 return ret;
1da177e4
LT		 4556}
4557
4558static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4559{
202b50dc
TM		 4560 struct nfs_server *server = NFS_SERVER(state->inode);
4561 struct nfs4_exception exception = { };
4562 int err;
4563
4564 do {
42a2d13e
TM		 4565 /* Cache the lock if possible... */
4566 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4567 return 0;
afe6c27c 4568 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4569 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4570 break;
4571 nfs4_handle_exception(server, err, &exception);
4572 } while (exception.retry);
4573 return err;
1da177e4
LT		 4574}
4575
4576static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4577{
202b50dc
TM		 4578 struct nfs_server *server = NFS_SERVER(state->inode);
4579 struct nfs4_exception exception = { };
4580 int err;
4581
6bfc93ef
TM		 4582 err = nfs4_set_lock_state(state, request);
4583 if (err != 0)
4584 return err;
202b50dc 4585 do {
42a2d13e
TM		 4586 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4587 return 0;
afe6c27c 4588 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4589 switch (err) {
4590 default:
4591 goto out;
4592 case -NFS4ERR_GRACE:
4593 case -NFS4ERR_DELAY:
4594 nfs4_handle_exception(server, err, &exception);
4595 err = 0;
4596 }
202b50dc 4597 } while (exception.retry);
a9ed2e25 4598out:
202b50dc 4599 return err;
1da177e4
LT		 4600}
4601
f062eb6c 4602#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4603static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4604{
b01dd1d8
BS		 4605 int status, ret = NFS_OK;
4606 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4607 struct nfs_server *server = NFS_SERVER(state->inode);
4608
b01dd1d8
BS		 4609 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4610 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4611 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4612 if (status != NFS_OK) {
4613 nfs41_free_stateid(server, &lsp->ls_stateid);
4614 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4615 ret = status;
4616 }
4617 }
4618 };
4619
4620 return ret;
4621}
4622
4623static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4624{
4625 int status = NFS_OK;
4626
4627 if (test_bit(LK_STATE_IN_USE, &state->flags))
4628 status = nfs41_check_expired_locks(state);
f062eb6c 4629 if (status == NFS_OK)
b01dd1d8 4630 return status;
f062eb6c
BS		 4631 return nfs4_lock_expired(state, request);
4632}
4633#endif
4634
1da177e4
LT		 4635static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4636{
19e03c57 4637 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4638 unsigned char fl_flags = request->fl_flags;
8e469ebd 4639 int status = -ENOLCK;
1da177e4 4640
8e469ebd
TM		 4641 if ((fl_flags & FL_POSIX) &&
4642 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4643 goto out;
6bfc93ef 4644 /* Is this a delegated open? */
6bfc93ef
TM		 4645 status = nfs4_set_lock_state(state, request);
4646 if (status != 0)
4647 goto out;
01c3b861
TM		 4648 request->fl_flags |= FL_ACCESS;
4649 status = do_vfs_lock(request->fl_file, request);
4650 if (status < 0)
4651 goto out;
19e03c57 4652 down_read(&nfsi->rwsem);
01c3b861 4653 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4654 /* Yes: cache locks! */
01c3b861 4655 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4656 request->fl_flags = fl_flags & ~FL_SLEEP;
4657 status = do_vfs_lock(request->fl_file, request);
4658 goto out_unlock;
01c3b861 4659 }
afe6c27c 4660 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4661 if (status != 0)
01c3b861 4662 goto out_unlock;
6bfc93ef 4663 /* Note: we always want to sleep here! */
01c3b861 4664 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4665 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4666 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4667 "manager!\n", __func__);
01c3b861 4668out_unlock:
19e03c57 4669 up_read(&nfsi->rwsem);
01c3b861
TM		 4670out:
4671 request->fl_flags = fl_flags;
1da177e4
LT		 4672 return status;
4673}
4674
4675static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4676{
a1d0b5ee
TM		 4677 struct nfs4_exception exception = {
4678 .state = state,
4679 };
1da177e4
LT		 4680 int err;
4681
4682 do {
965b5d67
TM		 4683 err = _nfs4_proc_setlk(state, cmd, request);
4684 if (err == -NFS4ERR_DENIED)
4685 err = -EAGAIN;
1da177e4 4686 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4687 err, &exception);
1da177e4
LT		 4688 } while (exception.retry);
4689 return err;
4690}
4691
4692static int
4693nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4694{
4695 struct nfs_open_context *ctx;
4696 struct nfs4_state *state;
4697 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4698 int status;
4699
4700 /* verify open state */
cd3758e3 4701 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4702 state = ctx->state;
4703
4704 if (request->fl_start < 0 || request->fl_end < 0)
4705 return -EINVAL;
4706
d953126a
TM		 4707 if (IS_GETLK(cmd)) {
4708 if (state != NULL)
4709 return nfs4_proc_getlk(state, F_GETLK, request);
4710 return 0;
4711 }
1da177e4
LT		 4712
4713 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4714 return -EINVAL;
4715
d953126a
TM		 4716 if (request->fl_type == F_UNLCK) {
4717 if (state != NULL)
4718 return nfs4_proc_unlck(state, cmd, request);
4719 return 0;
4720 }
1da177e4 4721
d953126a
TM		 4722 if (state == NULL)
4723 return -ENOLCK;
1da177e4
LT		 4724 do {
4725 status = nfs4_proc_setlk(state, cmd, request);
4726 if ((status != -EAGAIN) || IS_SETLK(cmd))
4727 break;
4728 timeout = nfs4_set_lock_task_retry(timeout);
4729 status = -ERESTARTSYS;
4730 if (signalled())
4731 break;
4732 } while(status < 0);
1da177e4
LT		 4733 return status;
4734}
4735
888e694c
TM		 4736int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4737{
4738 struct nfs_server *server = NFS_SERVER(state->inode);
4739 struct nfs4_exception exception = { };
4740 int err;
4741
4742 err = nfs4_set_lock_state(state, fl);
4743 if (err != 0)
4744 goto out;
4745 do {
afe6c27c 4746 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4747 switch (err) {
4748 default:
a030889a
WAA		 4749 printk(KERN_ERR "NFS: %s: unhandled error "
4750 "%d.\n", __func__, err);
d5122201 4751 case 0:
965b5d67 4752 case -ESTALE:
d5122201
TM		 4753 goto out;
4754 case -NFS4ERR_EXPIRED:
0ced63d1 4755 nfs4_schedule_stateid_recovery(server, state);
d5122201 4756 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4757 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4758 nfs4_schedule_lease_recovery(server->nfs_client);
4759 goto out;
74e7bb73
RL		 4760 case -NFS4ERR_BADSESSION:
4761 case -NFS4ERR_BADSLOT:
4762 case -NFS4ERR_BAD_HIGH_SLOT:
4763 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4764 case -NFS4ERR_DEADSESSION:
0400a6b0 4765 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4766 goto out;
965b5d67
TM		 4767 case -ERESTARTSYS:
4768 /*
4769 * The show must go on: exit, but mark the
4770 * stateid as needing recovery.
4771 */
a1d0b5ee 4772 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4773 case -NFS4ERR_ADMIN_REVOKED:
4774 case -NFS4ERR_BAD_STATEID:
4775 case -NFS4ERR_OPENMODE:
0400a6b0 4776 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4777 err = 0;
4778 goto out;
168667c4
TM		 4779 case -EKEYEXPIRED:
4780 /*
4781 * User RPCSEC_GSS context has expired.
4782 * We cannot recover this stateid now, so
4783 * skip it and allow recovery thread to
4784 * proceed.
4785 */
4786 err = 0;
4787 goto out;
965b5d67
TM		 4788 case -ENOMEM:
4789 case -NFS4ERR_DENIED:
4790 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4791 err = 0;
4792 goto out;
d5122201
TM		 4793 case -NFS4ERR_DELAY:
4794 break;
4795 }
888e694c
TM		 4796 err = nfs4_handle_exception(server, err, &exception);
4797 } while (exception.retry);
4798out:
4799 return err;
4800}
6b3b5496 4801
cf470c3e
TM		 4802struct nfs_release_lockowner_data {
4803 struct nfs4_lock_state *lsp;
5ae67c4f 4804 struct nfs_server *server;
cf470c3e
TM		 4805 struct nfs_release_lockowner_args args;
4806};
4807
d3c7b7cc
TM		 4808static void nfs4_release_lockowner_release(void *calldata)
4809{
cf470c3e 4810 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4811 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4812 kfree(calldata);
4813}
4814
17280175 4815static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4816 .rpc_release = nfs4_release_lockowner_release,
4817};
4818
cf470c3e 4819int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4820{
4821 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4822 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4823 struct rpc_message msg = {
4824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4825 };
4826
4827 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4828 return -EINVAL;
4829 data = kmalloc(sizeof(*data), GFP_NOFS);
4830 if (!data)
4831 return -ENOMEM;
4832 data->lsp = lsp;
5ae67c4f 4833 data->server = server;
cf470c3e
TM		 4834 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4835 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4836 data->args.lock_owner.s_dev = server->s_dev;
4837 msg.rpc_argp = &data->args;
4838 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4839 return 0;
d3c7b7cc
TM		 4840}
4841
aa1870af
BF		 4842#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4843
64c2ce8b
AK		 4844static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4845 const void *buf, size_t buflen,
4846 int flags, int type)
6b3b5496 4847{
64c2ce8b
AK		 4848 if (strcmp(key, "") != 0)
4849 return -EINVAL;
4b580ee3 4850
64c2ce8b 4851 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4852}
4853
64c2ce8b
AK		 4854static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4855 void *buf, size_t buflen, int type)
6b3b5496 4856{
64c2ce8b
AK		 4857 if (strcmp(key, "") != 0)
4858 return -EINVAL;
aa1870af 4859
64c2ce8b 4860 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4861}
4862
64c2ce8b
AK		 4863static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4864 size_t list_len, const char *name,
4865 size_t name_len, int type)
6b3b5496 4866{
64c2ce8b 4867 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4868
096455a2
BF		 4869 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4870 return 0;
64c2ce8b
AK		 4871
4872 if (list && len <= list_len)
4873 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4874 return len;
6b3b5496
BF		 4875}
4876
533eb461
AA		 4877/*
4878 * nfs_fhget will use either the mounted_on_fileid or the fileid
4879 */
69aaaae1
TM		 4880static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4881{
533eb461
AA		 4882 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4883 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4884 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4885 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4886 return;
4887
4888 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4889 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4890 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4891 fattr->nlink = 2;
4892}
4893
56659e99 4894int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4895 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4896{
4897 struct nfs_server *server = NFS_SERVER(dir);
4898 u32 bitmask[2] = {
361e624f 4899 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4900 };
4901 struct nfs4_fs_locations_arg args = {
4902 .dir_fh = NFS_FH(dir),
c228fd3a 4903 .name = name,
683b57b4
TM		 4904 .page = page,
4905 .bitmask = bitmask,
4906 };
22958463
BH		 4907 struct nfs4_fs_locations_res res = {
4908 .fs_locations = fs_locations,
4909 };
683b57b4
TM		 4910 struct rpc_message msg = {
4911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4912 .rpc_argp = &args,
22958463 4913 .rpc_resp = &res,
683b57b4
TM		 4914 };
4915 int status;
4916
3110ff80 4917 dprintk("%s: start\n", __func__);
533eb461
AA		 4918
4919 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4920 * is not supported */
4921 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4922 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4923 else
4924 bitmask[0] |= FATTR4_WORD0_FILEID;
4925
c228fd3a 4926 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4927 fs_locations->server = server;
830b8e33 4928 fs_locations->nlocations = 0;
7c513058 4929 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4930 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4931 return status;
4932}
4933
5a5ea0d4
BS		 4934static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4935{
4936 int status;
4937 struct nfs4_secinfo_arg args = {
4938 .dir_fh = NFS_FH(dir),
4939 .name = name,
4940 };
4941 struct nfs4_secinfo_res res = {
4942 .flavors = flavors,
4943 };
4944 struct rpc_message msg = {
4945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4946 .rpc_argp = &args,
4947 .rpc_resp = &res,
4948 };
4949
4950 dprintk("NFS call secinfo %s\n", name->name);
4951 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4952 dprintk("NFS reply secinfo: %d\n", status);
4953 return status;
4954}
4955
17280175
TM		 4956static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
4957 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 4958{
4959 struct nfs4_exception exception = { };
4960 int err;
4961 do {
4962 err = nfs4_handle_exception(NFS_SERVER(dir),
4963 _nfs4_proc_secinfo(dir, name, flavors),
4964 &exception);
4965 } while (exception.retry);
4966 return err;
4967}
4968
557134a3 4969#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4970/*
4971 * Check the exchange flags returned by the server for invalid flags, having
4972 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4973 * DS flags set.
4974 */
4975static int nfs4_check_cl_exchange_flags(u32 flags)
4976{
4977 if (flags & ~EXCHGID4_FLAG_MASK_R)
4978 goto out_inval;
4979 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4980 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4981 goto out_inval;
4982 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4983 goto out_inval;
4984 return NFS_OK;
4985out_inval:
4986 return -NFS4ERR_INVAL;
4987}
4988
78fe0f41
WAA		 4989static bool
4990nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4991{
4992 if (a->server_scope_sz == b->server_scope_sz &&
4993 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4994 return true;
4995
4996 return false;
4997}
4998
99fe60d0
BH		 4999/*
5000 * nfs4_proc_exchange_id()
5001 *
5002 * Since the clientid has expired, all compounds using sessions
5003 * associated with the stale clientid will be returning
5004 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5005 * be in some phase of session reset.
5006 */
4d643d1d 5007int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5008{
5009 nfs4_verifier verifier;
5010 struct nfs41_exchange_id_args args = {
cd93710e 5011 .verifier = &verifier,
99fe60d0 5012 .client = clp,
357f54d6 5013 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5014 };
5015 struct nfs41_exchange_id_res res = {
5016 .client = clp,
5017 };
5018 int status;
5019 struct rpc_message msg = {
5020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5021 .rpc_argp = &args,
5022 .rpc_resp = &res,
5023 .rpc_cred = cred,
5024 };
99fe60d0
BH		 5025
5026 dprintk("--> %s\n", __func__);
5027 BUG_ON(clp == NULL);
a7b72103 5028
cd93710e 5029 nfs4_construct_boot_verifier(clp, &verifier);
99fe60d0 5030
c7a360b0
AA		 5031 args.id_len = scnprintf(args.id, sizeof(args.id),
5032 "%s/%s.%s/%u",
5033 clp->cl_ipaddr,
5034 init_utsname()->nodename,
5035 init_utsname()->domainname,
5036 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5037
78fe0f41 5038 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
abe9a6d5
WAA		 5039 if (unlikely(!res.server_scope)) {
5040 status = -ENOMEM;
5041 goto out;
5042 }
78fe0f41 5043
7d2ed9ac
WAA		 5044 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5045 if (unlikely(!res.impl_id)) {
5046 status = -ENOMEM;
5047 goto out_server_scope;
5048 }
5049
1bd714f2 5050 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 5051 if (!status)
5052 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41 5053
7d2ed9ac
WAA		 5054 if (!status) {
5055 /* use the most recent implementation id */
5056 kfree(clp->impl_id);
5057 clp->impl_id = res.impl_id;
5058 } else
5059 kfree(res.impl_id);
5060
78fe0f41
WAA		 5061 if (!status) {
5062 if (clp->server_scope &&
5063 !nfs41_same_server_scope(clp->server_scope,
5064 res.server_scope)) {
5065 dprintk("%s: server_scope mismatch detected\n",
5066 __func__);
5067 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5068 kfree(clp->server_scope);
5069 clp->server_scope = NULL;
5070 }
5071
abe9a6d5 5072 if (!clp->server_scope) {
78fe0f41 5073 clp->server_scope = res.server_scope;
abe9a6d5
WAA		 5074 goto out;
5075 }
78fe0f41 5076 }
7d2ed9ac
WAA		 5077
5078out_server_scope:
abe9a6d5
WAA		 5079 kfree(res.server_scope);
5080out:
7d2ed9ac
WAA		 5081 if (clp->impl_id)
5082 dprintk("%s: Server Implementation ID: "
5083 "domain: %s, name: %s, date: %llu,%u\n",
5084 __func__, clp->impl_id->domain, clp->impl_id->name,
5085 clp->impl_id->date.seconds,
5086 clp->impl_id->date.nseconds);
99fe60d0
BH		 5087 dprintk("<-- %s status= %d\n", __func__, status);
5088 return status;
5089}
5090
2050f0cc
AA		 5091struct nfs4_get_lease_time_data {
5092 struct nfs4_get_lease_time_args *args;
5093 struct nfs4_get_lease_time_res *res;
5094 struct nfs_client *clp;
5095};
5096
5097static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5098 void *calldata)
5099{
5100 int ret;
5101 struct nfs4_get_lease_time_data *data =
5102 (struct nfs4_get_lease_time_data *)calldata;
5103
5104 dprintk("--> %s\n", __func__);
689cf5c1 5105 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5106 /* just setup sequence, do not trigger session recovery
5107 since we're invoked within one */
5108 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5109 &data->args->la_seq_args,
9d12b216 5110 &data->res->lr_seq_res, task);
2050f0cc
AA		 5111
5112 BUG_ON(ret == -EAGAIN);
5113 rpc_call_start(task);
5114 dprintk("<-- %s\n", __func__);
5115}
5116
5117/*
5118 * Called from nfs4_state_manager thread for session setup, so don't recover
5119 * from sequence operation or clientid errors.
5120 */
5121static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5122{
5123 struct nfs4_get_lease_time_data *data =
5124 (struct nfs4_get_lease_time_data *)calldata;
5125
5126 dprintk("--> %s\n", __func__);
14516c3a
TM		 5127 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5128 return;
2050f0cc
AA		 5129 switch (task->tk_status) {
5130 case -NFS4ERR_DELAY:
5131 case -NFS4ERR_GRACE:
5132 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5133 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5134 task->tk_status = 0;
a8a4ae3a
AA		 5135 /* fall through */
5136 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5137 rpc_restart_call_prepare(task);
2050f0cc
AA		 5138 return;
5139 }
2050f0cc
AA		 5140 dprintk("<-- %s\n", __func__);
5141}
5142
17280175 5143static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5144 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5145 .rpc_call_done = nfs4_get_lease_time_done,
5146};
5147
5148int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5149{
5150 struct rpc_task *task;
5151 struct nfs4_get_lease_time_args args;
5152 struct nfs4_get_lease_time_res res = {
5153 .lr_fsinfo = fsinfo,
5154 };
5155 struct nfs4_get_lease_time_data data = {
5156 .args = &args,
5157 .res = &res,
5158 .clp = clp,
5159 };
5160 struct rpc_message msg = {
5161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5162 .rpc_argp = &args,
5163 .rpc_resp = &res,
5164 };
5165 struct rpc_task_setup task_setup = {
5166 .rpc_client = clp->cl_rpcclient,
5167 .rpc_message = &msg,
5168 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5169 .callback_data = &data,
5170 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5171 };
5172 int status;
5173
9d12b216 5174 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5175 dprintk("--> %s\n", __func__);
5176 task = rpc_run_task(&task_setup);
5177
5178 if (IS_ERR(task))
5179 status = PTR_ERR(task);
5180 else {
5181 status = task->tk_status;
5182 rpc_put_task(task);
5183 }
5184 dprintk("<-- %s return %d\n", __func__, status);
5185
5186 return status;
5187}
5188
f86f36a6
TM		 5189static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5190{
5191 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5192}
5193
5194static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5195 struct nfs4_slot *new,
5196 u32 max_slots,
5197 u32 ivalue)
5198{
5199 struct nfs4_slot *old = NULL;
5200 u32 i;
5201
5202 spin_lock(&tbl->slot_tbl_lock);
5203 if (new) {
5204 old = tbl->slots;
5205 tbl->slots = new;
5206 tbl->max_slots = max_slots;
5207 }
5208 tbl->highest_used_slotid = -1; /* no slot is currently used */
5209 for (i = 0; i < tbl->max_slots; i++)
5210 tbl->slots[i].seq_nr = ivalue;
5211 spin_unlock(&tbl->slot_tbl_lock);
5212 kfree(old);
5213}
5214
b73dafa7 5215/*
f86f36a6 5216 * (re)Initialise a slot table
b73dafa7 5217 */
f86f36a6
TM		 5218static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5219 u32 ivalue)
ac72b7b3 5220{
104aeba4 5221 struct nfs4_slot *new = NULL;
f86f36a6 5222 int ret = -ENOMEM;
ac72b7b3 5223
104aeba4
AA		 5224 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5225 max_reqs, tbl->max_slots);
ac72b7b3 5226
104aeba4
AA		 5227 /* Does the newly negotiated max_reqs match the existing slot table? */
5228 if (max_reqs != tbl->max_slots) {
f86f36a6 5229 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5230 if (!new)
5231 goto out;
104aeba4 5232 }
f86f36a6
TM		 5233 ret = 0;
5234
5235 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5236 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5237 tbl, tbl->slots, tbl->max_slots);
5238out:
5239 dprintk("<-- %s: return %d\n", __func__, ret);
5240 return ret;
5241}
5242
f8625a6a
RL		 5243/* Destroy the slot table */
5244static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5245{
5246 if (session->fc_slot_table.slots != NULL) {
5247 kfree(session->fc_slot_table.slots);
5248 session->fc_slot_table.slots = NULL;
5249 }
5250 if (session->bc_slot_table.slots != NULL) {
5251 kfree(session->bc_slot_table.slots);
5252 session->bc_slot_table.slots = NULL;
5253 }
5254 return;
5255}
5256
050047ce 5257/*
aacd5537 5258 * Initialize or reset the forechannel and backchannel tables
050047ce 5259 */
aacd5537 5260static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5261{
f26468fb 5262 struct nfs4_slot_table *tbl;
aacd5537 5263 int status;
050047ce 5264
aacd5537
AA		 5265 dprintk("--> %s\n", __func__);
5266 /* Fore channel */
5267 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5268 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5269 if (status) /* -ENOMEM */
5270 return status;
aacd5537
AA		 5271 /* Back channel */
5272 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5273 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5274 if (status && tbl->slots == NULL)
5275 /* Fore and back channel share a connection so get
5276 * both slot tables or neither */
5277 nfs4_destroy_slot_tables(ses);
f8625a6a 5278 return status;
557134a3
AA		 5279}
5280
5281struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5282{
5283 struct nfs4_session *session;
5284 struct nfs4_slot_table *tbl;
5285
8535b2be 5286 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5287 if (!session)
5288 return NULL;
76db6d95 5289
557134a3 5290 tbl = &session->fc_slot_table;
45d43c29 5291 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5292 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5293 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5294 init_completion(&tbl->complete);
f8625a6a
RL		 5295
5296 tbl = &session->bc_slot_table;
45d43c29 5297 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5298 spin_lock_init(&tbl->slot_tbl_lock);
5299 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5300 init_completion(&tbl->complete);
f8625a6a 5301
1055d76d
TM		 5302 session->session_state = 1<<NFS4_SESSION_INITING;
5303
557134a3
AA		 5304 session->clp = clp;
5305 return session;
5306}
5307
5308void nfs4_destroy_session(struct nfs4_session *session)
5309{
2446ab60
TM		 5310 struct rpc_xprt *xprt;
5311
5a0ffe54 5312 nfs4_proc_destroy_session(session);
2446ab60
TM		 5313
5314 rcu_read_lock();
5315 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5316 rcu_read_unlock();
5a0ffe54 5317 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5318 __func__, xprt);
5319 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5320 nfs4_destroy_slot_tables(session);
557134a3
AA		 5321 kfree(session);
5322}
5323
fc931582
AA		 5324/*
5325 * Initialize the values to be used by the client in CREATE_SESSION
5326 * If nfs4_init_session set the fore channel request and response sizes,
5327 * use them.
5328 *
5329 * Set the back channel max_resp_sz_cached to zero to force the client to
5330 * always set csa_cachethis to FALSE because the current implementation
5331 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5332 */
5333static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5334{
5335 struct nfs4_session *session = args->client->cl_session;
5336 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5337 mxresp_sz = session->fc_attrs.max_resp_sz;
5338
5339 if (mxrqst_sz == 0)
5340 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5341 if (mxresp_sz == 0)
5342 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5343 /* Fore channel attributes */
fc931582
AA		 5344 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5345 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5346 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5347 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5348
5349 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5350 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5351 __func__,
5352 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5353 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5354
5355 /* Back channel attributes */
fc931582
AA		 5356 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5357 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5358 args->bc_attrs.max_resp_sz_cached = 0;
5359 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5360 args->bc_attrs.max_reqs = 1;
5361
5362 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5363 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5364 __func__,
5365 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5366 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5367 args->bc_attrs.max_reqs);
5368}
5369
43c2e885 5370static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5371{
43c2e885
BF		 5372 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5373 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5374
43c2e885
BF		 5375 if (rcvd->max_resp_sz > sent->max_resp_sz)
5376 return -EINVAL;
5377 /*
5378 * Our requested max_ops is the minimum we need; we're not
5379 * prepared to break up compounds into smaller pieces than that.
5380 * So, no point even trying to continue if the server won't
5381 * cooperate:
5382 */
5383 if (rcvd->max_ops < sent->max_ops)
5384 return -EINVAL;
5385 if (rcvd->max_reqs == 0)
5386 return -EINVAL;
b4b9a0c1
VG		 5387 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5388 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5389 return 0;
8d35301d
AA		 5390}
5391
43c2e885
BF		 5392static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5393{
5394 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5395 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5396
43c2e885
BF		 5397 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5398 return -EINVAL;
5399 if (rcvd->max_resp_sz < sent->max_resp_sz)
5400 return -EINVAL;
5401 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5402 return -EINVAL;
5403 /* These would render the backchannel useless: */
b4b9a0c1 5404 if (rcvd->max_ops != sent->max_ops)
43c2e885 5405 return -EINVAL;
b4b9a0c1 5406 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5407 return -EINVAL;
5408 return 0;
5409}
8d35301d 5410
8d35301d
AA		 5411static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5412 struct nfs4_session *session)
5413{
43c2e885 5414 int ret;
8d35301d 5415
43c2e885
BF		 5416 ret = nfs4_verify_fore_channel_attrs(args, session);
5417 if (ret)
5418 return ret;
5419 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5420}
5421
fc931582
AA		 5422static int _nfs4_proc_create_session(struct nfs_client *clp)
5423{
5424 struct nfs4_session *session = clp->cl_session;
5425 struct nfs41_create_session_args args = {
5426 .client = clp,
5427 .cb_program = NFS4_CALLBACK,
5428 };
5429 struct nfs41_create_session_res res = {
5430 .client = clp,
5431 };
5432 struct rpc_message msg = {
5433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5434 .rpc_argp = &args,
5435 .rpc_resp = &res,
5436 };
5437 int status;
5438
5439 nfs4_init_channel_attrs(&args);
0f91421e 5440 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5441
1bd714f2 5442 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5443
8d35301d
AA		 5444 if (!status)
5445 /* Verify the session's negotiated channel_attrs values */
5446 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5447 if (!status) {
5448 /* Increment the clientid slot sequence id */
5449 clp->cl_seqid++;
5450 }
5451
5452 return status;
5453}
5454
5455/*
5456 * Issues a CREATE_SESSION operation to the server.
5457 * It is the responsibility of the caller to verify the session is
5458 * expired before calling this routine.
5459 */
f26468fb 5460int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5461{
5462 int status;
5463 unsigned *ptr;
fc931582
AA		 5464 struct nfs4_session *session = clp->cl_session;
5465
5466 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5467
fd954ae1 5468 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5469 if (status)
5470 goto out;
5471
aacd5537
AA		 5472 /* Init or reset the session slot tables */
5473 status = nfs4_setup_session_slot_tables(session);
5474 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5475 if (status)
5476 goto out;
5477
5478 ptr = (unsigned *)&session->sess_id.data[0];
5479 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5480 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5481out:
5482 dprintk("<-- %s\n", __func__);
5483 return status;
5484}
5485
0f3e66c6
AA		 5486/*
5487 * Issue the over-the-wire RPC DESTROY_SESSION.
5488 * The caller must serialize access to this routine.
5489 */
5490int nfs4_proc_destroy_session(struct nfs4_session *session)
5491{
5492 int status = 0;
5493 struct rpc_message msg;
5494
5495 dprintk("--> nfs4_proc_destroy_session\n");
5496
5497 /* session is still being setup */
5498 if (session->clp->cl_cons_state != NFS_CS_READY)
5499 return status;
5500
5501 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5502 msg.rpc_argp = session;
5503 msg.rpc_resp = NULL;
5504 msg.rpc_cred = NULL;
1bd714f2 5505 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5506
5507 if (status)
5508 printk(KERN_WARNING
f9fd2d9c 5509 "NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5510 "Session has been destroyed regardless...\n", status);
5511
5512 dprintk("<-- nfs4_proc_destroy_session\n");
5513 return status;
5514}
5515
fccba804
TM		 5516int nfs4_init_session(struct nfs_server *server)
5517{
5518 struct nfs_client *clp = server->nfs_client;
2449ea2e 5519 struct nfs4_session *session;
68bf05ef 5520 unsigned int rsize, wsize;
fccba804
TM		 5521 int ret;
5522
5523 if (!nfs4_has_session(clp))
5524 return 0;
5525
1055d76d
TM		 5526 session = clp->cl_session;
5527 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5528 return 0;
5529
68bf05ef
AA		 5530 rsize = server->rsize;
5531 if (rsize == 0)
5532 rsize = NFS_MAX_FILE_IO_SIZE;
5533 wsize = server->wsize;
5534 if (wsize == 0)
5535 wsize = NFS_MAX_FILE_IO_SIZE;
5536
68bf05ef
AA		 5537 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5538 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5539
fccba804
TM		 5540 ret = nfs4_recover_expired_lease(server);
5541 if (!ret)
5542 ret = nfs4_check_client_ready(clp);
5543 return ret;
5544}
5545
d83217c1
AA		 5546int nfs4_init_ds_session(struct nfs_client *clp)
5547{
5548 struct nfs4_session *session = clp->cl_session;
5549 int ret;
5550
5551 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5552 return 0;
5553
5554 ret = nfs4_client_recover_expired_lease(clp);
5555 if (!ret)
5556 /* Test for the DS role */
5557 if (!is_ds_client(clp))
5558 ret = -ENODEV;
5559 if (!ret)
5560 ret = nfs4_check_client_ready(clp);
5561 return ret;
5562
5563}
5564EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5565
5566
fc01cea9
AA		 5567/*
5568 * Renew the cl_session lease.
5569 */
d5f8d3fe
TM		 5570struct nfs4_sequence_data {
5571 struct nfs_client *clp;
5572 struct nfs4_sequence_args args;
5573 struct nfs4_sequence_res res;
5574};
5575
dc96aef9
AB		 5576static void nfs41_sequence_release(void *data)
5577{
d5f8d3fe
TM		 5578 struct nfs4_sequence_data *calldata = data;
5579 struct nfs_client *clp = calldata->clp;
dc96aef9 5580
7135840f
AB		 5581 if (atomic_read(&clp->cl_count) > 1)
5582 nfs4_schedule_state_renewal(clp);
5583 nfs_put_client(clp);
d5f8d3fe 5584 kfree(calldata);
dc96aef9
AB		 5585}
5586
aa5190d0
TM		 5587static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5588{
5589 switch(task->tk_status) {
5590 case -NFS4ERR_DELAY:
aa5190d0
TM		 5591 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5592 return -EAGAIN;
5593 default:
0400a6b0 5594 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5595 }
5596 return 0;
5597}
5598
dc96aef9 5599static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5600{
d5f8d3fe
TM		 5601 struct nfs4_sequence_data *calldata = data;
5602 struct nfs_client *clp = calldata->clp;
fc01cea9 5603
14516c3a
TM		 5604 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5605 return;
fc01cea9
AA		 5606
5607 if (task->tk_status < 0) {
5608 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5609 if (atomic_read(&clp->cl_count) == 1)
5610 goto out;
fc01cea9 5611
aa5190d0
TM		 5612 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5613 rpc_restart_call_prepare(task);
fc01cea9
AA		 5614 return;
5615 }
5616 }
fc01cea9 5617 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5618out:
fc01cea9
AA		 5619 dprintk("<-- %s\n", __func__);
5620}
5621
5622static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5623{
d5f8d3fe
TM		 5624 struct nfs4_sequence_data *calldata = data;
5625 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5626 struct nfs4_sequence_args *args;
5627 struct nfs4_sequence_res *res;
5628
fc01cea9
AA		 5629 args = task->tk_msg.rpc_argp;
5630 res = task->tk_msg.rpc_resp;
5631
9d12b216 5632 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5633 return;
5634 rpc_call_start(task);
5635}
5636
5637static const struct rpc_call_ops nfs41_sequence_ops = {
5638 .rpc_call_done = nfs41_sequence_call_done,
5639 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5640 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5641};
5642
71ac6da9 5643static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5644{
d5f8d3fe 5645 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5646 struct rpc_message msg = {
5647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5648 .rpc_cred = cred,
5649 };
71ac6da9
TM		 5650 struct rpc_task_setup task_setup_data = {
5651 .rpc_client = clp->cl_rpcclient,
5652 .rpc_message = &msg,
5653 .callback_ops = &nfs41_sequence_ops,
5654 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5655 };
fc01cea9 5656
7135840f 5657 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5658 return ERR_PTR(-EIO);
dfb4f309 5659 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5660 if (calldata == NULL) {
7135840f 5661 nfs_put_client(clp);
71ac6da9 5662 return ERR_PTR(-ENOMEM);
fc01cea9 5663 }
9d12b216 5664 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5665 msg.rpc_argp = &calldata->args;
5666 msg.rpc_resp = &calldata->res;
5667 calldata->clp = clp;
71ac6da9 5668 task_setup_data.callback_data = calldata;
fc01cea9 5669
71ac6da9
TM		 5670 return rpc_run_task(&task_setup_data);
5671}
5672
2f60ea6b 5673static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5674{
5675 struct rpc_task *task;
5676 int ret = 0;
5677
2f60ea6b
TM		 5678 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5679 return 0;
71ac6da9
TM		 5680 task = _nfs41_proc_sequence(clp, cred);
5681 if (IS_ERR(task))
5682 ret = PTR_ERR(task);
5683 else
bf294b41 5684 rpc_put_task_async(task);
71ac6da9
TM		 5685 dprintk("<-- %s status=%d\n", __func__, ret);
5686 return ret;
5687}
5688
5689static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5690{
5691 struct rpc_task *task;
5692 int ret;
5693
5694 task = _nfs41_proc_sequence(clp, cred);
5695 if (IS_ERR(task)) {
5696 ret = PTR_ERR(task);
5697 goto out;
5698 }
5699 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5700 if (!ret) {
5701 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5702
5703 if (task->tk_status == 0)
5704 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5705 ret = task->tk_status;
b4410c2f 5706 }
71ac6da9
TM		 5707 rpc_put_task(task);
5708out:
5709 dprintk("<-- %s status=%d\n", __func__, ret);
5710 return ret;
fc01cea9
AA		 5711}
5712
fce5c838
RL		 5713struct nfs4_reclaim_complete_data {
5714 struct nfs_client *clp;
5715 struct nfs41_reclaim_complete_args arg;
5716 struct nfs41_reclaim_complete_res res;
5717};
5718
5719static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5720{
5721 struct nfs4_reclaim_complete_data *calldata = data;
5722
b257957e 5723 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5724 if (nfs41_setup_sequence(calldata->clp->cl_session,
5725 &calldata->arg.seq_args,
9d12b216 5726 &calldata->res.seq_res, task))
fce5c838
RL		 5727 return;
5728
5729 rpc_call_start(task);
5730}
5731
aa5190d0
TM		 5732static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5733{
5734 switch(task->tk_status) {
5735 case 0:
5736 case -NFS4ERR_COMPLETE_ALREADY:
5737 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5738 break;
5739 case -NFS4ERR_DELAY:
aa5190d0 5740 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5741 /* fall through */
5742 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5743 return -EAGAIN;
5744 default:
0400a6b0 5745 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5746 }
5747 return 0;
5748}
5749
fce5c838
RL		 5750static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5751{
5752 struct nfs4_reclaim_complete_data *calldata = data;
5753 struct nfs_client *clp = calldata->clp;
5754 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5755
5756 dprintk("--> %s\n", __func__);
14516c3a
TM		 5757 if (!nfs41_sequence_done(task, res))
5758 return;
fce5c838 5759
aa5190d0
TM		 5760 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5761 rpc_restart_call_prepare(task);
5762 return;
5763 }
fce5c838
RL		 5764 dprintk("<-- %s\n", __func__);
5765}
5766
5767static void nfs4_free_reclaim_complete_data(void *data)
5768{
5769 struct nfs4_reclaim_complete_data *calldata = data;
5770
5771 kfree(calldata);
5772}
5773
5774static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5775 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5776 .rpc_call_done = nfs4_reclaim_complete_done,
5777 .rpc_release = nfs4_free_reclaim_complete_data,
5778};
5779
5780/*
5781 * Issue a global reclaim complete.
5782 */
5783static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5784{
5785 struct nfs4_reclaim_complete_data *calldata;
5786 struct rpc_task *task;
5787 struct rpc_message msg = {
5788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5789 };
5790 struct rpc_task_setup task_setup_data = {
5791 .rpc_client = clp->cl_rpcclient,
5792 .rpc_message = &msg,
5793 .callback_ops = &nfs4_reclaim_complete_call_ops,
5794 .flags = RPC_TASK_ASYNC,
5795 };
5796 int status = -ENOMEM;
5797
5798 dprintk("--> %s\n", __func__);
8535b2be 5799 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5800 if (calldata == NULL)
5801 goto out;
5802 calldata->clp = clp;
5803 calldata->arg.one_fs = 0;
fce5c838 5804
9d12b216 5805 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5806 msg.rpc_argp = &calldata->arg;
5807 msg.rpc_resp = &calldata->res;
5808 task_setup_data.callback_data = calldata;
5809 task = rpc_run_task(&task_setup_data);
acf82b85 5810 if (IS_ERR(task)) {
fce5c838 5811 status = PTR_ERR(task);
acf82b85
DC		 5812 goto out;
5813 }
c34c32ea
AA		 5814 status = nfs4_wait_for_completion_rpc_task(task);
5815 if (status == 0)
5816 status = task->tk_status;
fce5c838 5817 rpc_put_task(task);
acf82b85 5818 return 0;
fce5c838
RL		 5819out:
5820 dprintk("<-- %s status=%d\n", __func__, status);
5821 return status;
5822}
b1f69b75
AA		 5823
5824static void
5825nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5826{
5827 struct nfs4_layoutget *lgp = calldata;
c31663d4 5828 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5829
5830 dprintk("--> %s\n", __func__);
c31663d4
FI		 5831 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5832 * right now covering the LAYOUTGET we are about to send.
5833 * However, that is not so catastrophic, and there seems
5834 * to be no way to prevent it completely.
5835 */
b1f69b75 5836 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 5837 &lgp->res.seq_res, task))
b1f69b75 5838 return;
cf7d63f1
FI		 5839 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5840 NFS_I(lgp->args.inode)->layout,
5841 lgp->args.ctx->state)) {
5842 rpc_exit(task, NFS4_OK);
5843 return;
5844 }
b1f69b75
AA		 5845 rpc_call_start(task);
5846}
5847
5848static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5849{
5850 struct nfs4_layoutget *lgp = calldata;
5851 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5852
5853 dprintk("--> %s\n", __func__);
5854
5855 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5856 return;
5857
5858 switch (task->tk_status) {
5859 case 0:
5860 break;
5861 case -NFS4ERR_LAYOUTTRYLATER:
5862 case -NFS4ERR_RECALLCONFLICT:
5863 task->tk_status = -NFS4ERR_DELAY;
5864 /* Fall through */
5865 default:
5866 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5867 rpc_restart_call_prepare(task);
5868 return;
5869 }
5870 }
b1f69b75
AA		 5871 dprintk("<-- %s\n", __func__);
5872}
5873
5874static void nfs4_layoutget_release(void *calldata)
5875{
5876 struct nfs4_layoutget *lgp = calldata;
5877
5878 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5879 put_nfs_open_context(lgp->args.ctx);
5880 kfree(calldata);
5881 dprintk("<-- %s\n", __func__);
5882}
5883
5884static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5885 .rpc_call_prepare = nfs4_layoutget_prepare,
5886 .rpc_call_done = nfs4_layoutget_done,
5887 .rpc_release = nfs4_layoutget_release,
5888};
5889
5890int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5891{
5892 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5893 struct rpc_task *task;
5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5896 .rpc_argp = &lgp->args,
5897 .rpc_resp = &lgp->res,
5898 };
5899 struct rpc_task_setup task_setup_data = {
5900 .rpc_client = server->client,
5901 .rpc_message = &msg,
5902 .callback_ops = &nfs4_layoutget_call_ops,
5903 .callback_data = lgp,
5904 .flags = RPC_TASK_ASYNC,
5905 };
5906 int status = 0;
5907
5908 dprintk("--> %s\n", __func__);
5909
35124a09 5910 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 5911 lgp->res.seq_res.sr_slot = NULL;
9d12b216 5912 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 5913 task = rpc_run_task(&task_setup_data);
5914 if (IS_ERR(task))
5915 return PTR_ERR(task);
5916 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5917 if (status == 0)
5918 status = task->tk_status;
5919 if (status == 0)
5920 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5921 rpc_put_task(task);
5922 dprintk("<-- %s status=%d\n", __func__, status);
5923 return status;
5924}
5925
cbe82603
BH		 5926static void
5927nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5928{
5929 struct nfs4_layoutreturn *lrp = calldata;
5930
5931 dprintk("--> %s\n", __func__);
5932 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 5933 &lrp->res.seq_res, task))
cbe82603
BH		 5934 return;
5935 rpc_call_start(task);
5936}
5937
5938static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5939{
5940 struct nfs4_layoutreturn *lrp = calldata;
5941 struct nfs_server *server;
a56aaa02 5942 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5943
5944 dprintk("--> %s\n", __func__);
5945
5946 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5947 return;
5948
5949 server = NFS_SERVER(lrp->args.inode);
5950 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5951 rpc_restart_call_prepare(task);
cbe82603
BH		 5952 return;
5953 }
a2e1d4f2 5954 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5955 if (task->tk_status == 0) {
cbe82603 5956 if (lrp->res.lrs_present) {
cbe82603 5957 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5958 } else
5959 BUG_ON(!list_empty(&lo->plh_segs));
5960 }
a2e1d4f2
FI		 5961 lo->plh_block_lgets--;
5962 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5963 dprintk("<-- %s\n", __func__);
5964}
5965
5966static void nfs4_layoutreturn_release(void *calldata)
5967{
5968 struct nfs4_layoutreturn *lrp = calldata;
5969
5970 dprintk("--> %s\n", __func__);
a56aaa02 5971 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5972 kfree(calldata);
5973 dprintk("<-- %s\n", __func__);
5974}
5975
5976static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5977 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5978 .rpc_call_done = nfs4_layoutreturn_done,
5979 .rpc_release = nfs4_layoutreturn_release,
5980};
5981
5982int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5983{
5984 struct rpc_task *task;
5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5987 .rpc_argp = &lrp->args,
5988 .rpc_resp = &lrp->res,
5989 };
5990 struct rpc_task_setup task_setup_data = {
5991 .rpc_client = lrp->clp->cl_rpcclient,
5992 .rpc_message = &msg,
5993 .callback_ops = &nfs4_layoutreturn_call_ops,
5994 .callback_data = lrp,
5995 };
5996 int status;
5997
5998 dprintk("--> %s\n", __func__);
9d12b216 5999 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6000 task = rpc_run_task(&task_setup_data);
6001 if (IS_ERR(task))
6002 return PTR_ERR(task);
6003 status = task->tk_status;
6004 dprintk("<-- %s status=%d\n", __func__, status);
6005 rpc_put_task(task);
6006 return status;
6007}
6008
7f11d8d3
AA		 6009/*
6010 * Retrieve the list of Data Server devices from the MDS.
6011 */
6012static int _nfs4_getdevicelist(struct nfs_server *server,
6013 const struct nfs_fh *fh,
6014 struct pnfs_devicelist *devlist)
6015{
6016 struct nfs4_getdevicelist_args args = {
6017 .fh = fh,
6018 .layoutclass = server->pnfs_curr_ld->id,
6019 };
6020 struct nfs4_getdevicelist_res res = {
6021 .devlist = devlist,
6022 };
6023 struct rpc_message msg = {
6024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6025 .rpc_argp = &args,
6026 .rpc_resp = &res,
6027 };
6028 int status;
6029
6030 dprintk("--> %s\n", __func__);
6031 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6032 &res.seq_res, 0);
6033 dprintk("<-- %s status=%d\n", __func__, status);
6034 return status;
6035}
6036
6037int nfs4_proc_getdevicelist(struct nfs_server *server,
6038 const struct nfs_fh *fh,
6039 struct pnfs_devicelist *devlist)
6040{
6041 struct nfs4_exception exception = { };
6042 int err;
6043
6044 do {
6045 err = nfs4_handle_exception(server,
6046 _nfs4_getdevicelist(server, fh, devlist),
6047 &exception);
6048 } while (exception.retry);
6049
6050 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6051 err, devlist->num_devs);
6052
6053 return err;
6054}
6055EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6056
b1f69b75
AA		 6057static int
6058_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6059{
6060 struct nfs4_getdeviceinfo_args args = {
6061 .pdev = pdev,
6062 };
6063 struct nfs4_getdeviceinfo_res res = {
6064 .pdev = pdev,
6065 };
6066 struct rpc_message msg = {
6067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6068 .rpc_argp = &args,
6069 .rpc_resp = &res,
6070 };
6071 int status;
6072
6073 dprintk("--> %s\n", __func__);
7c513058 6074 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6075 dprintk("<-- %s status=%d\n", __func__, status);
6076
6077 return status;
6078}
6079
6080int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6081{
6082 struct nfs4_exception exception = { };
6083 int err;
6084
6085 do {
6086 err = nfs4_handle_exception(server,
6087 _nfs4_proc_getdeviceinfo(server, pdev),
6088 &exception);
6089 } while (exception.retry);
6090 return err;
6091}
6092EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6093
863a3c6c
AA		 6094static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6095{
6096 struct nfs4_layoutcommit_data *data = calldata;
6097 struct nfs_server *server = NFS_SERVER(data->args.inode);
6098
6099 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6100 &data->res.seq_res, task))
863a3c6c
AA		 6101 return;
6102 rpc_call_start(task);
6103}
6104
6105static void
6106nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6107{
6108 struct nfs4_layoutcommit_data *data = calldata;
6109 struct nfs_server *server = NFS_SERVER(data->args.inode);
6110
6111 if (!nfs4_sequence_done(task, &data->res.seq_res))
6112 return;
6113
6114 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6115 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6116 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6117 case -NFS4ERR_BADLAYOUT: /* no layout */
6118 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6119 task->tk_status = 0;
e59d27e0
TM		 6120 break;
6121 case 0:
863a3c6c
AA		 6122 nfs_post_op_update_inode_force_wcc(data->args.inode,
6123 data->res.fattr);
e59d27e0
TM		 6124 break;
6125 default:
6126 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6127 rpc_restart_call_prepare(task);
6128 return;
6129 }
6130 }
863a3c6c
AA		 6131}
6132
6133static void nfs4_layoutcommit_release(void *calldata)
6134{
6135 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6136 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6137 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6138
db29c089 6139 pnfs_cleanup_layoutcommit(data);
863a3c6c 6140 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6141 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6142 list_del_init(&lseg->pls_lc_list);
6143 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6144 &lseg->pls_flags))
6145 put_lseg(lseg);
6146 }
92407e75
PT		 6147
6148 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6149 smp_mb__after_clear_bit();
6150 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6151
863a3c6c
AA		 6152 put_rpccred(data->cred);
6153 kfree(data);
6154}
6155
6156static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6157 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6158 .rpc_call_done = nfs4_layoutcommit_done,
6159 .rpc_release = nfs4_layoutcommit_release,
6160};
6161
6162int
ef311537 6163nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6164{
6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6167 .rpc_argp = &data->args,
6168 .rpc_resp = &data->res,
6169 .rpc_cred = data->cred,
6170 };
6171 struct rpc_task_setup task_setup_data = {
6172 .task = &data->task,
6173 .rpc_client = NFS_CLIENT(data->args.inode),
6174 .rpc_message = &msg,
6175 .callback_ops = &nfs4_layoutcommit_ops,
6176 .callback_data = data,
6177 .flags = RPC_TASK_ASYNC,
6178 };
6179 struct rpc_task *task;
6180 int status = 0;
6181
6182 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6183 "lbw: %llu inode %lu\n",
6184 data->task.tk_pid, sync,
6185 data->args.lastbytewritten,
6186 data->args.inode->i_ino);
6187
9d12b216 6188 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6189 task = rpc_run_task(&task_setup_data);
6190 if (IS_ERR(task))
6191 return PTR_ERR(task);
ef311537 6192 if (sync == false)
863a3c6c
AA		 6193 goto out;
6194 status = nfs4_wait_for_completion_rpc_task(task);
6195 if (status != 0)
6196 goto out;
6197 status = task->tk_status;
6198out:
6199 dprintk("%s: status %d\n", __func__, status);
6200 rpc_put_task(task);
6201 return status;
6202}
fca78d6d
BS		 6203
6204static int
6205_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6206 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6207{
6208 struct nfs41_secinfo_no_name_args args = {
6209 .style = SECINFO_STYLE_CURRENT_FH,
6210 };
6211 struct nfs4_secinfo_res res = {
6212 .flavors = flavors,
6213 };
6214 struct rpc_message msg = {
6215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6216 .rpc_argp = &args,
6217 .rpc_resp = &res,
6218 };
6219 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6220}
6221
6222static int
6223nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6224 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6225{
6226 struct nfs4_exception exception = { };
6227 int err;
6228 do {
6229 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6230 switch (err) {
6231 case 0:
6232 case -NFS4ERR_WRONGSEC:
6233 case -NFS4ERR_NOTSUPP:
05e9cfb4 6234 goto out;
fca78d6d
BS		 6235 default:
6236 err = nfs4_handle_exception(server, err, &exception);
6237 }
6238 } while (exception.retry);
05e9cfb4 6239out:
fca78d6d
BS		 6240 return err;
6241}
6242
6243static int
6244nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6245 struct nfs_fsinfo *info)
6246{
6247 int err;
6248 struct page *page;
6249 rpc_authflavor_t flavor;
6250 struct nfs4_secinfo_flavors *flavors;
6251
6252 page = alloc_page(GFP_KERNEL);
6253 if (!page) {
6254 err = -ENOMEM;
6255 goto out;
6256 }
6257
6258 flavors = page_address(page);
6259 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6260
6261 /*
6262 * Fall back on "guess and check" method if
6263 * the server doesn't support SECINFO_NO_NAME
6264 */
6265 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6266 err = nfs4_find_root_sec(server, fhandle, info);
6267 goto out_freepage;
6268 }
6269 if (err)
6270 goto out_freepage;
6271
6272 flavor = nfs_find_best_sec(flavors);
6273 if (err == 0)
6274 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6275
6276out_freepage:
6277 put_page(page);
6278 if (err == -EACCES)
6279 return -EPERM;
6280out:
6281 return err;
6282}
1cab0652
BS		 6283
6284static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6285{
6286 int status;
6287 struct nfs41_test_stateid_args args = {
1cab0652 6288 .stateid = stateid,
7d974794
BS		 6289 };
6290 struct nfs41_test_stateid_res res;
6291 struct rpc_message msg = {
6292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6293 .rpc_argp = &args,
6294 .rpc_resp = &res,
6295 };
1cab0652 6296
9d12b216 6297 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6298 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6299
6300 if (status == NFS_OK)
6301 return res.status;
7d974794
BS		 6302 return status;
6303}
6304
1cab0652 6305static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6306{
6307 struct nfs4_exception exception = { };
6308 int err;
6309 do {
6310 err = nfs4_handle_exception(server,
1cab0652 6311 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6312 &exception);
6313 } while (exception.retry);
6314 return err;
6315}
9aeda35f 6316
1cab0652 6317static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6318{
9aeda35f 6319 struct nfs41_free_stateid_args args = {
1cab0652 6320 .stateid = stateid,
9aeda35f
BS		 6321 };
6322 struct nfs41_free_stateid_res res;
6323 struct rpc_message msg = {
6324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6325 .rpc_argp = &args,
6326 .rpc_resp = &res,
6327 };
6328
9d12b216
TM		 6329 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6330 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6331}
6332
1cab0652 6333static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6334{
6335 struct nfs4_exception exception = { };
6336 int err;
6337 do {
6338 err = nfs4_handle_exception(server,
1cab0652 6339 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6340 &exception);
6341 } while (exception.retry);
6342 return err;
6343}
36281caa
TM		 6344
6345static bool nfs41_match_stateid(const nfs4_stateid *s1,
6346 const nfs4_stateid *s2)
6347{
2d2f24ad 6348 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6349 return false;
6350
2d2f24ad 6351 if (s1->seqid == s2->seqid)
36281caa 6352 return true;
2d2f24ad 6353 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6354 return true;
6355
6356 return false;
6357}
6358
557134a3
AA		 6359#endif /* CONFIG_NFS_V4_1 */
6360
36281caa
TM		 6361static bool nfs4_match_stateid(const nfs4_stateid *s1,
6362 const nfs4_stateid *s2)
6363{
f597c537 6364 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6365}
6366
6367
17280175 6368static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6369 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6370 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6371 .recover_open = nfs4_open_reclaim,
6372 .recover_lock = nfs4_lock_reclaim,
591d71cb 6373 .establish_clid = nfs4_init_clientid,
90a16617 6374 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6375};
6376
591d71cb 6377#if defined(CONFIG_NFS_V4_1)
17280175 6378static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6379 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6380 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6381 .recover_open = nfs4_open_reclaim,
6382 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6383 .establish_clid = nfs41_init_clientid,
b4b82607 6384 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6385 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6386};
6387#endif /* CONFIG_NFS_V4_1 */
6388
17280175 6389static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6390 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6391 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6392 .recover_open = nfs4_open_expired,
6393 .recover_lock = nfs4_lock_expired,
6394 .establish_clid = nfs4_init_clientid,
90a16617 6395 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6396};
6397
6398#if defined(CONFIG_NFS_V4_1)
17280175 6399static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6400 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6401 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6402 .recover_open = nfs41_open_expired,
6403 .recover_lock = nfs41_lock_expired,
4d643d1d 6404 .establish_clid = nfs41_init_clientid,
b4b82607 6405 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6406};
591d71cb 6407#endif /* CONFIG_NFS_V4_1 */
1da177e4 6408
17280175 6409static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6410 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6411 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6412 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6413};
6414
6415#if defined(CONFIG_NFS_V4_1)
17280175 6416static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6417 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6418 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6419 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6420};
6421#endif
6422
97dc1359
TM		 6423static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6424 .minor_version = 0,
6425 .call_sync = _nfs4_call_sync,
36281caa 6426 .match_stateid = nfs4_match_stateid,
fca78d6d 6427 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6428 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6429 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6430 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6431};
6432
6433#if defined(CONFIG_NFS_V4_1)
6434static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6435 .minor_version = 1,
6436 .call_sync = _nfs4_call_sync_session,
36281caa 6437 .match_stateid = nfs41_match_stateid,
fca78d6d 6438 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6439 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6440 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6441 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6442};
6443#endif
6444
97dc1359
TM		 6445const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6446 [0] = &nfs_v4_0_minor_ops,
6447#if defined(CONFIG_NFS_V4_1)
6448 [1] = &nfs_v4_1_minor_ops,
6449#endif
6450};
6451
92e1d5be 6452static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6453 .permission = nfs_permission,
6454 .getattr = nfs_getattr,
6455 .setattr = nfs_setattr,
64c2ce8b
AK		 6456 .getxattr = generic_getxattr,
6457 .setxattr = generic_setxattr,
6458 .listxattr = generic_listxattr,
6459 .removexattr = generic_removexattr,
6b3b5496
BF		 6460};
6461
509de811 6462const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6463 .version = 4, /* protocol version */
6464 .dentry_ops = &nfs4_dentry_operations,
6465 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6466 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6467 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6468 .getroot = nfs4_proc_get_root,
6469 .getattr = nfs4_proc_getattr,
6470 .setattr = nfs4_proc_setattr,
6471 .lookup = nfs4_proc_lookup,
6472 .access = nfs4_proc_access,
6473 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6474 .create = nfs4_proc_create,
6475 .remove = nfs4_proc_remove,
6476 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6477 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6478 .unlink_done = nfs4_proc_unlink_done,
6479 .rename = nfs4_proc_rename,
d3d4152a 6480 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6481 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6482 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6483 .link = nfs4_proc_link,
6484 .symlink = nfs4_proc_symlink,
6485 .mkdir = nfs4_proc_mkdir,
6486 .rmdir = nfs4_proc_remove,
6487 .readdir = nfs4_proc_readdir,
6488 .mknod = nfs4_proc_mknod,
6489 .statfs = nfs4_proc_statfs,
6490 .fsinfo = nfs4_proc_fsinfo,
6491 .pathconf = nfs4_proc_pathconf,
e9326dca 6492 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6493 .decode_dirent = nfs4_decode_dirent,
6494 .read_setup = nfs4_proc_read_setup,
ea7c3303 6495 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6496 .read_done = nfs4_read_done,
1da177e4 6497 .write_setup = nfs4_proc_write_setup,
c6cb80d0 6498 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6499 .write_done = nfs4_write_done,
1da177e4 6500 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6501 .commit_done = nfs4_commit_done,
1da177e4 6502 .lock = nfs4_proc_lock,
e50a1c2e 6503 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6504 .close_context = nfs4_close_context,
2b484297 6505 .open_context = nfs4_atomic_open,
45a52a02 6506 .init_client = nfs4_init_client,
5a5ea0d4 6507 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6508};
6509
64c2ce8b
AK		 6510static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6511 .prefix = XATTR_NAME_NFSV4_ACL,
6512 .list = nfs4_xattr_list_nfs4_acl,
6513 .get = nfs4_xattr_get_nfs4_acl,
6514 .set = nfs4_xattr_set_nfs4_acl,
6515};
6516
6517const struct xattr_handler *nfs4_xattr_handlers[] = {
6518 &nfs4_xattr_nfs4_acl_handler,
6519 NULL
6520};
6521
ef159e91
TM		 6522module_param(max_session_slots, ushort, 0644);
6523MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6524 "requests the client will negotiate");
6525
1da177e4
LT		 6526/*
6527 * Local variables:
6528 * c-basic-offset: 8
6529 * End:
6530 */
Linux kernel - Deliverables
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