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[mirror_ubuntu-hirsute-kernel.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 272 case -NFS4ERR_OPENMODE:
14977489 273 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
3114ea7a
TM		 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:
9e33bed5
TM		 285 if (state == NULL)
286 break;
14977489 287 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 288 nfs4_schedule_stateid_recovery(server, state);
289 goto wait_on_recovery;
0ced63d1
TM		 290 case -NFS4ERR_EXPIRED:
291 if (state != NULL)
292 nfs4_schedule_stateid_recovery(server, state);
65de872e 293 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 294 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 295 nfs4_schedule_lease_recovery(clp);
296 goto wait_on_recovery;
03391693 297#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 298 case -NFS4ERR_BADSESSION:
299 case -NFS4ERR_BADSLOT:
300 case -NFS4ERR_BAD_HIGH_SLOT:
301 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
302 case -NFS4ERR_DEADSESSION:
303 case -NFS4ERR_SEQ_FALSE_RETRY:
304 case -NFS4ERR_SEQ_MISORDERED:
305 dprintk("%s ERROR: %d Reset session\n", __func__,
306 errorcode);
0400a6b0 307 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 308 exception->retry = 1;
b9179237 309 break;
03391693 310#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 311 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 312 if (exception->timeout > HZ) {
313 /* We have retried a decent amount, time to
314 * fail
315 */
316 ret = -EBUSY;
317 break;
318 }
65de872e
TM		 319 case -NFS4ERR_GRACE:
320 case -NFS4ERR_DELAY:
2c643488 321 case -EKEYEXPIRED:
65de872e
TM		 322 ret = nfs4_delay(server->client, &exception->timeout);
323 if (ret != 0)
324 break;
a8a4ae3a 325 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 326 case -NFS4ERR_OLD_STATEID:
327 exception->retry = 1;
b064eca2
TM		 328 break;
329 case -NFS4ERR_BADOWNER:
330 /* The following works around a Linux server bug! */
331 case -NFS4ERR_BADNAME:
332 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
333 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
334 exception->retry = 1;
335 printk(KERN_WARNING "NFS: v4 server %s "
336 "does not accept raw "
337 "uid/gids. "
338 "Reenabling the idmapper.\n",
339 server->nfs_client->cl_hostname);
340 }
65de872e
TM		 341 }
342 /* We failed to handle the error */
343 return nfs4_map_errors(ret);
0400a6b0 344wait_on_recovery:
a2c0b9e2
TM		 345 ret = nfs4_wait_clnt_recover(clp);
346 if (ret == 0)
347 exception->retry = 1;
348 return ret;
65de872e
TM		 349}
350
351
452e9352 352static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 353{
1da177e4
LT		 354 spin_lock(&clp->cl_lock);
355 if (time_before(clp->cl_last_renewal,timestamp))
356 clp->cl_last_renewal = timestamp;
357 spin_unlock(&clp->cl_lock);
358}
359
452e9352
TM		 360static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
361{
362 do_renew_lease(server->nfs_client, timestamp);
363}
364
cccef3b9
AA		 365#if defined(CONFIG_NFS_V4_1)
366
e2c4ab3c
AA		 367/*
368 * nfs4_free_slot - free a slot and efficiently update slot table.
369 *
370 * freeing a slot is trivially done by clearing its respective bit
371 * in the bitmap.
372 * If the freed slotid equals highest_used_slotid we want to update it
373 * so that the server would be able to size down the slot table if needed,
374 * otherwise we know that the highest_used_slotid is still in use.
375 * When updating highest_used_slotid there may be "holes" in the bitmap
376 * so we need to scan down from highest_used_slotid to 0 looking for the now
377 * highest slotid in use.
45d43c29 378 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 379 *
380 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 381 */
382static void
45d43c29 383nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 384{
45d43c29 385 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 386 /* clear used bit in bitmap */
387 __clear_bit(slotid, tbl->used_slots);
388
389 /* update highest_used_slotid when it is freed */
390 if (slotid == tbl->highest_used_slotid) {
391 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 392 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 393 tbl->highest_used_slotid = slotid;
394 else
45d43c29 395 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 396 }
45d43c29
TM		 397 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
398 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 399}
400
961a828d
TM		 401bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
402{
403 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
404 return true;
e2c4ab3c
AA		 405}
406
3bfb0fc5 407/*
42acd021 408 * Signal state manager thread if session fore channel is drained
3bfb0fc5 409 */
42acd021 410static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 411{
a2118c33 412 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 413 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
414 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 415 return;
416 }
417
45d43c29 418 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 419 return;
420
42acd021
AA		 421 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
422 complete(&ses->fc_slot_table.complete);
423}
424
425/*
426 * Signal state manager thread if session back channel is drained
427 */
428void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
429{
430 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 431 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 432 return;
433 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
434 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 435}
436
d185a334 437static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 438{
439 struct nfs4_slot_table *tbl;
440
d185a334 441 tbl = &res->sr_session->fc_slot_table;
dfb4f309 442 if (!res->sr_slot) {
13615871
AA		 443 /* just wake up the next guy waiting since
444 * we may have not consumed a slot after all */
691daf3b 445 dprintk("%s: No slot\n", __func__);
35dc1d74 446 return;
13615871 447 }
ea028ac9 448
35dc1d74 449 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 450 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 451 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 452 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 453 res->sr_slot = NULL;
13615871
AA		 454}
455
14516c3a 456static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 457{
458 unsigned long timestamp;
14516c3a 459 struct nfs_client *clp;
b0df806c
AA		 460
461 /*
462 * sr_status remains 1 if an RPC level error occurred. The server
463 * may or may not have processed the sequence operation..
464 * Proceed as if the server received and processed the sequence
465 * operation.
466 */
467 if (res->sr_status == 1)
468 res->sr_status = NFS_OK;
469
468f8613
BS		 470 /* don't increment the sequence number if the task wasn't sent */
471 if (!RPC_WAS_SENT(task))
b0df806c
AA		 472 goto out;
473
691daf3b 474 /* Check the SEQUENCE operation status */
14516c3a
TM		 475 switch (res->sr_status) {
476 case 0:
b0df806c 477 /* Update the slot's sequence and clientid lease timer */
dfb4f309 478 ++res->sr_slot->seq_nr;
b0df806c 479 timestamp = res->sr_renewal_time;
14516c3a 480 clp = res->sr_session->clp;
452e9352 481 do_renew_lease(clp, timestamp);
0629e370 482 /* Check sequence flags */
b4410c2f
TM		 483 if (res->sr_status_flags != 0)
484 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 485 break;
486 case -NFS4ERR_DELAY:
487 /* The server detected a resend of the RPC call and
488 * returned NFS4ERR_DELAY as per Section 2.10.6.2
489 * of RFC5661.
490 */
12364a4f 491 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 492 __func__,
493 res->sr_slot - res->sr_session->fc_slot_table.slots,
494 res->sr_slot->seq_nr);
14516c3a
TM		 495 goto out_retry;
496 default:
497 /* Just update the slot sequence no. */
dfb4f309 498 ++res->sr_slot->seq_nr;
b0df806c
AA		 499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 503 nfs41_sequence_free_slot(res);
14516c3a
TM		 504 return 1;
505out_retry:
d05dd4e9 506 if (!rpc_restart_call(task))
14516c3a
TM		 507 goto out;
508 rpc_delay(task, NFS4_POLL_RETRY_MAX);
509 return 0;
b0df806c
AA		 510}
511
14516c3a
TM		 512static int nfs4_sequence_done(struct rpc_task *task,
513 struct nfs4_sequence_res *res)
df896455 514{
14516c3a
TM		 515 if (res->sr_session == NULL)
516 return 1;
517 return nfs41_sequence_done(task, res);
df896455
TM		 518}
519
510b8175
BH		 520/*
521 * nfs4_find_slot - efficiently look for a free slot
522 *
523 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
524 * If found, we mark the slot as used, update the highest_used_slotid,
525 * and respectively set up the sequence operation args.
45d43c29 526 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 527 *
528 * Note: must be called with under the slot_tbl_lock.
510b8175 529 */
45d43c29 530static u32
40ead580 531nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 532{
45d43c29
TM		 533 u32 slotid;
534 u32 ret_id = NFS4_NO_SLOT;
510b8175 535
45d43c29 536 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 537 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
538 tbl->max_slots);
539 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
540 if (slotid >= tbl->max_slots)
541 goto out;
542 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 543 if (slotid > tbl->highest_used_slotid ||
544 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 545 tbl->highest_used_slotid = slotid;
546 ret_id = slotid;
547out:
548 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
549 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 550 return ret_id;
551}
552
9d12b216
TM		 553static void nfs41_init_sequence(struct nfs4_sequence_args *args,
554 struct nfs4_sequence_res *res, int cache_reply)
555{
556 args->sa_session = NULL;
557 args->sa_cache_this = 0;
558 if (cache_reply)
559 args->sa_cache_this = 1;
560 res->sr_session = NULL;
561 res->sr_slot = NULL;
562}
563
dc70d7b3 564int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
ce5039c1
AA		 567 struct rpc_task *task)
568{
fbcd4abc
AA		 569 struct nfs4_slot *slot;
570 struct nfs4_slot_table *tbl;
45d43c29 571 u32 slotid;
fbcd4abc
AA		 572
573 dprintk("--> %s\n", __func__);
ce5039c1 574 /* slot already allocated? */
dfb4f309 575 if (res->sr_slot != NULL)
ce5039c1
AA		 576 return 0;
577
fbcd4abc
AA		 578 tbl = &session->fc_slot_table;
579
580 spin_lock(&tbl->slot_tbl_lock);
a2118c33 581 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 582 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 583 /* The state manager will wait until the slot table is empty */
05f0d236 584 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 585 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 586 dprintk("%s session is draining\n", __func__);
05f0d236 587 return -EAGAIN;
b069d94a
AA		 588 }
589
689cf5c1
AB		 590 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
591 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
592 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
593 spin_unlock(&tbl->slot_tbl_lock);
594 dprintk("%s enforce FIFO order\n", __func__);
595 return -EAGAIN;
596 }
597
40ead580 598 slotid = nfs4_find_slot(tbl);
45d43c29 599 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 600 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
601 spin_unlock(&tbl->slot_tbl_lock);
602 dprintk("<-- %s: no free slots\n", __func__);
603 return -EAGAIN;
604 }
605 spin_unlock(&tbl->slot_tbl_lock);
606
689cf5c1 607 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 608 slot = tbl->slots + slotid;
99fe60d0 609 args->sa_session = session;
fbcd4abc 610 args->sa_slotid = slotid;
fbcd4abc
AA		 611
612 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
613
99fe60d0 614 res->sr_session = session;
dfb4f309 615 res->sr_slot = slot;
fbcd4abc 616 res->sr_renewal_time = jiffies;
2a6e26cd 617 res->sr_status_flags = 0;
fbcd4abc
AA		 618 /*
619 * sr_status is only set in decode_sequence, and so will remain
620 * set to 1 if an rpc level failure occurs.
621 */
622 res->sr_status = 1;
ce5039c1
AA		 623 return 0;
624}
dc70d7b3 625EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 626
035168ab 627int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 628 struct nfs4_sequence_args *args,
629 struct nfs4_sequence_res *res,
ce5039c1
AA		 630 struct rpc_task *task)
631{
035168ab 632 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 633 int ret = 0;
634
9d12b216 635 if (session == NULL)
035168ab 636 goto out;
035168ab 637
12364a4f 638 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 639 __func__, session->clp, session, res->sr_slot ?
640 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 641
9d12b216 642 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 643out:
644 dprintk("<-- %s status=%d\n", __func__, ret);
645 return ret;
646}
647
648struct nfs41_call_sync_data {
035168ab 649 const struct nfs_server *seq_server;
ce5039c1
AA		 650 struct nfs4_sequence_args *seq_args;
651 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 652};
653
654static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
655{
656 struct nfs41_call_sync_data *data = calldata;
657
035168ab
TM		 658 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
659
660 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 661 data->seq_res, task))
ce5039c1
AA		 662 return;
663 rpc_call_start(task);
664}
665
b257957e
AB		 666static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
667{
668 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
669 nfs41_call_sync_prepare(task, calldata);
670}
671
69ab40c4
AA		 672static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
673{
674 struct nfs41_call_sync_data *data = calldata;
675
14516c3a 676 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 677}
678
17280175 679static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 680 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 681 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 682};
683
17280175 684static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 685 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
686 .rpc_call_done = nfs41_call_sync_done,
687};
688
7c513058
BS		 689static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
690 struct nfs_server *server,
ce5039c1
AA		 691 struct rpc_message *msg,
692 struct nfs4_sequence_args *args,
693 struct nfs4_sequence_res *res,
b257957e 694 int privileged)
ce5039c1
AA		 695{
696 int ret;
697 struct rpc_task *task;
698 struct nfs41_call_sync_data data = {
035168ab 699 .seq_server = server,
ce5039c1
AA		 700 .seq_args = args,
701 .seq_res = res,
ce5039c1
AA		 702 };
703 struct rpc_task_setup task_setup = {
7c513058 704 .rpc_client = clnt,
ce5039c1
AA		 705 .rpc_message = msg,
706 .callback_ops = &nfs41_call_sync_ops,
707 .callback_data = &data
708 };
709
b257957e
AB		 710 if (privileged)
711 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 712 task = rpc_run_task(&task_setup);
713 if (IS_ERR(task))
714 ret = PTR_ERR(task);
715 else {
716 ret = task->tk_status;
717 rpc_put_task(task);
718 }
719 return ret;
720}
721
7c513058
BS		 722int _nfs4_call_sync_session(struct rpc_clnt *clnt,
723 struct nfs_server *server,
cccef3b9
AA		 724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
727 int cache_reply)
728{
9d12b216
TM		 729 nfs41_init_sequence(args, res, cache_reply);
730 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 731}
732
df896455 733#else
9d12b216
TM		 734static inline
735void nfs41_init_sequence(struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res, int cache_reply)
737{
738}
739
14516c3a
TM		 740static int nfs4_sequence_done(struct rpc_task *task,
741 struct nfs4_sequence_res *res)
df896455 742{
14516c3a 743 return 1;
df896455 744}
cccef3b9
AA		 745#endif /* CONFIG_NFS_V4_1 */
746
7c513058
BS		 747int _nfs4_call_sync(struct rpc_clnt *clnt,
748 struct nfs_server *server,
cccef3b9
AA		 749 struct rpc_message *msg,
750 struct nfs4_sequence_args *args,
751 struct nfs4_sequence_res *res,
752 int cache_reply)
753{
9d12b216 754 nfs41_init_sequence(args, res, cache_reply);
7c513058 755 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 756}
757
e73b83f2 758static inline
7c513058
BS		 759int nfs4_call_sync(struct rpc_clnt *clnt,
760 struct nfs_server *server,
e73b83f2
BS		 761 struct rpc_message *msg,
762 struct nfs4_sequence_args *args,
763 struct nfs4_sequence_res *res,
764 int cache_reply)
765{
7c513058
BS		 766 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
767 args, res, cache_reply);
e73b83f2 768}
cccef3b9 769
38478b24 770static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 771{
38478b24 772 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 773
38478b24 774 spin_lock(&dir->i_lock);
40d24704 775 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
a9a4a87a 776 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 777 nfs_force_lookup_revalidate(dir);
a9a4a87a 778 dir->i_version = cinfo->after;
38478b24 779 spin_unlock(&dir->i_lock);
1da177e4
LT		 780}
781
e56e0b78 782struct nfs4_opendata {
c6d00e63 783 struct kref kref;
e56e0b78
TM		 784 struct nfs_openargs o_arg;
785 struct nfs_openres o_res;
cdd4e68b
TM		 786 struct nfs_open_confirmargs c_arg;
787 struct nfs_open_confirmres c_res;
6926afd1
TM		 788 struct nfs4_string owner_name;
789 struct nfs4_string group_name;
e56e0b78
TM		 790 struct nfs_fattr f_attr;
791 struct nfs_fattr dir_attr;
e56e0b78 792 struct dentry *dir;
82a2c1b7 793 struct dentry *dentry;
e56e0b78 794 struct nfs4_state_owner *owner;
aac00a8d 795 struct nfs4_state *state;
e56e0b78 796 struct iattr attrs;
26e976a8 797 unsigned long timestamp;
3e309914 798 unsigned int rpc_done : 1;
24ac23ab
TM		 799 int rpc_status;
800 int cancelled;
e56e0b78
TM		 801};
802
2ced46c2
TM		 803
804static void nfs4_init_opendata_res(struct nfs4_opendata *p)
805{
806 p->o_res.f_attr = &p->f_attr;
807 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 808 p->o_res.seqid = p->o_arg.seqid;
809 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 810 p->o_res.server = p->o_arg.server;
811 nfs_fattr_init(&p->f_attr);
812 nfs_fattr_init(&p->dir_attr);
6926afd1 813 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 814}
815
82a2c1b7 816static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 817 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 818 const struct iattr *attrs,
819 gfp_t gfp_mask)
e56e0b78 820{
82a2c1b7 821 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 822 struct inode *dir = parent->d_inode;
823 struct nfs_server *server = NFS_SERVER(dir);
824 struct nfs4_opendata *p;
825
8535b2be 826 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 827 if (p == NULL)
828 goto err;
8535b2be 829 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 830 if (p->o_arg.seqid == NULL)
831 goto err_free;
82a2c1b7
AV		 832 nfs_sb_active(dentry->d_sb);
833 p->dentry = dget(dentry);
e56e0b78
TM		 834 p->dir = parent;
835 p->owner = sp;
836 atomic_inc(&sp->so_count);
837 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 838 p->o_arg.open_flags = flags;
839 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 840 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 841 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
842 p->o_arg.id.uniquifier = 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 }
95b72eb0 1470 /* Update client id. */
1f0e890d 1471 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1472 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1473 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1474 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1475 }
26e976a8 1476 data->timestamp = jiffies;
035168ab 1477 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1478 &data->o_arg.seq_args,
9d12b216 1479 &data->o_res.seq_res, task))
d898528c 1480 return;
5138fde0 1481 rpc_call_start(task);
6ee41268 1482 return;
652f89f6
TM		 1483unlock_no_action:
1484 rcu_read_unlock();
6ee41268
TM		 1485out_no_action:
1486 task->tk_action = NULL;
1487
24ac23ab 1488}
1da177e4 1489
b257957e
AB		 1490static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1491{
1492 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1493 nfs4_open_prepare(task, calldata);
1494}
1495
24ac23ab
TM		 1496static void nfs4_open_done(struct rpc_task *task, void *calldata)
1497{
1498 struct nfs4_opendata *data = calldata;
1da177e4 1499
24ac23ab 1500 data->rpc_status = task->tk_status;
d898528c 1501
14516c3a
TM		 1502 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1503 return;
d898528c 1504
24ac23ab
TM		 1505 if (task->tk_status == 0) {
1506 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1507 case S_IFREG:
1508 break;
1509 case S_IFLNK:
24ac23ab 1510 data->rpc_status = -ELOOP;
6f926b5b
TM		 1511 break;
1512 case S_IFDIR:
24ac23ab 1513 data->rpc_status = -EISDIR;
6f926b5b
TM		 1514 break;
1515 default:
24ac23ab 1516 data->rpc_status = -ENOTDIR;
6f926b5b 1517 }
26e976a8 1518 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1519 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1520 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1521 }
3e309914 1522 data->rpc_done = 1;
24ac23ab 1523}
6f926b5b 1524
24ac23ab
TM		 1525static void nfs4_open_release(void *calldata)
1526{
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state *state = NULL;
1529
1530 /* If this request hasn't been cancelled, do nothing */
1531 if (data->cancelled == 0)
1532 goto out_free;
1533 /* In case of error, no cleanup! */
3e309914 1534 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1535 goto out_free;
1536 /* In case we need an open_confirm, no cleanup! */
1537 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1538 goto out_free;
24ac23ab 1539 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1540 if (!IS_ERR(state))
643168c2 1541 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1542out_free:
c6d00e63 1543 nfs4_opendata_put(data);
24ac23ab
TM		 1544}
1545
1546static const struct rpc_call_ops nfs4_open_ops = {
1547 .rpc_call_prepare = nfs4_open_prepare,
1548 .rpc_call_done = nfs4_open_done,
1549 .rpc_release = nfs4_open_release,
1550};
1551
b257957e
AB		 1552static const struct rpc_call_ops nfs4_recover_open_ops = {
1553 .rpc_call_prepare = nfs4_recover_open_prepare,
1554 .rpc_call_done = nfs4_open_done,
1555 .rpc_release = nfs4_open_release,
1556};
1557
1558static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1559{
1560 struct inode *dir = data->dir->d_inode;
1561 struct nfs_server *server = NFS_SERVER(dir);
1562 struct nfs_openargs *o_arg = &data->o_arg;
1563 struct nfs_openres *o_res = &data->o_res;
1564 struct rpc_task *task;
5138fde0
TM		 1565 struct rpc_message msg = {
1566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1567 .rpc_argp = o_arg,
1568 .rpc_resp = o_res,
1569 .rpc_cred = data->owner->so_cred,
1570 };
c970aa85
TM		 1571 struct rpc_task_setup task_setup_data = {
1572 .rpc_client = server->client,
5138fde0 1573 .rpc_message = &msg,
c970aa85
TM		 1574 .callback_ops = &nfs4_open_ops,
1575 .callback_data = data,
101070ca 1576 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1577 .flags = RPC_TASK_ASYNC,
1578 };
24ac23ab
TM		 1579 int status;
1580
9d12b216 1581 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1582 kref_get(&data->kref);
3e309914
TM		 1583 data->rpc_done = 0;
1584 data->rpc_status = 0;
2ced46c2 1585 data->cancelled = 0;
b257957e
AB		 1586 if (isrecover)
1587 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1588 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1589 if (IS_ERR(task))
1590 return PTR_ERR(task);
1591 status = nfs4_wait_for_completion_rpc_task(task);
1592 if (status != 0) {
1593 data->cancelled = 1;
1594 smp_wmb();
1595 } else
1596 status = data->rpc_status;
1597 rpc_put_task(task);
1598
1599 return status;
1600}
1601
1602static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1603{
1604 struct inode *dir = data->dir->d_inode;
1605 struct nfs_openres *o_res = &data->o_res;
1606 int status;
1607
1608 status = nfs4_run_open_task(data, 1);
1609 if (status != 0 || !data->rpc_done)
1610 return status;
1611
6926afd1
TM		 1612 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1613
b257957e
AB		 1614 nfs_refresh_inode(dir, o_res->dir_attr);
1615
1616 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1617 status = _nfs4_proc_open_confirm(data);
1618 if (status != 0)
1619 return status;
1620 }
1621
1622 return status;
1623}
1624
1625/*
1626 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1627 */
1628static int _nfs4_proc_open(struct nfs4_opendata *data)
1629{
1630 struct inode *dir = data->dir->d_inode;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs_openargs *o_arg = &data->o_arg;
1633 struct nfs_openres *o_res = &data->o_res;
1634 int status;
1635
1636 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1637 if (!data->rpc_done)
1638 return status;
1639 if (status != 0) {
1640 if (status == -NFS4ERR_BADNAME &&
1641 !(o_arg->open_flags & O_CREAT))
1642 return -ENOENT;
24ac23ab 1643 return status;
08ef7bd3 1644 }
24ac23ab 1645
6926afd1
TM		 1646 nfs_fattr_map_and_free_names(server, &data->f_attr);
1647
56ae19f3
TM		 1648 if (o_arg->open_flags & O_CREAT) {
1649 update_changeattr(dir, &o_res->cinfo);
1650 nfs_post_op_update_inode(dir, o_res->dir_attr);
1651 } else
1652 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1653 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1654 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1655 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1656 status = _nfs4_proc_open_confirm(data);
1da177e4 1657 if (status != 0)
24ac23ab 1658 return status;
1da177e4
LT		 1659 }
1660 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1661 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1662 return 0;
1da177e4
LT		 1663}
1664
d83217c1 1665static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1666{
a78cb57a 1667 unsigned int loop;
6b30954e 1668 int ret;
58d9714a 1669
a78cb57a 1670 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1671 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1672 if (ret != 0)
a78cb57a 1673 break;
e598d843
TM		 1674 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1675 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1676 break;
0400a6b0 1677 nfs4_schedule_state_manager(clp);
a78cb57a 1678 ret = -EIO;
6b30954e 1679 }
a78cb57a 1680 return ret;
58d9714a
TM		 1681}
1682
d83217c1
AA		 1683static int nfs4_recover_expired_lease(struct nfs_server *server)
1684{
1685 return nfs4_client_recover_expired_lease(server->nfs_client);
1686}
1687
1da177e4
LT		 1688/*
1689 * OPEN_EXPIRED:
1690 * reclaim state on the server after a network partition.
1691 * Assumes caller holds the appropriate lock
1692 */
539cd03a 1693static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1694{
e56e0b78 1695 struct nfs4_opendata *opendata;
864472e9 1696 int ret;
1da177e4 1697
6f220ed5
TM		 1698 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1699 if (IS_ERR(opendata))
1700 return PTR_ERR(opendata);
864472e9 1701 ret = nfs4_open_recover(opendata, state);
35d05778 1702 if (ret == -ESTALE)
3d4ff43d 1703 d_drop(ctx->dentry);
c6d00e63 1704 nfs4_opendata_put(opendata);
864472e9 1705 return ret;
1da177e4
LT		 1706}
1707
a9ed2e25 1708static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1709{
539cd03a 1710 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1711 struct nfs4_exception exception = { };
1712 int err;
1713
1714 do {
539cd03a 1715 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1716 switch (err) {
1717 default:
1718 goto out;
1719 case -NFS4ERR_GRACE:
1720 case -NFS4ERR_DELAY:
1721 nfs4_handle_exception(server, err, &exception);
1722 err = 0;
1723 }
202b50dc 1724 } while (exception.retry);
a9ed2e25 1725out:
202b50dc
TM		 1726 return err;
1727}
1728
1da177e4
LT		 1729static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1730{
1da177e4 1731 struct nfs_open_context *ctx;
864472e9 1732 int ret;
1da177e4 1733
864472e9
TM		 1734 ctx = nfs4_state_find_open_context(state);
1735 if (IS_ERR(ctx))
1736 return PTR_ERR(ctx);
539cd03a 1737 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1738 put_nfs_open_context(ctx);
1739 return ret;
1da177e4
LT		 1740}
1741
f062eb6c 1742#if defined(CONFIG_NFS_V4_1)
b01dd1d8 1743static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
f062eb6c 1744{
b01dd1d8 1745 int status = NFS_OK;
f062eb6c
BS		 1746 struct nfs_server *server = NFS_SERVER(state->inode);
1747
b01dd1d8
BS		 1748 if (state->flags & flags) {
1749 status = nfs41_test_stateid(server, stateid);
1750 if (status != NFS_OK) {
1751 nfs41_free_stateid(server, stateid);
1752 state->flags &= ~flags;
1753 }
1754 }
1755 return status;
1756}
1757
1758static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1759{
1760 int deleg_status, open_status;
1761 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1762 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1763
1764 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1765 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1766
1767 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1768 return NFS_OK;
f062eb6c
BS		 1769 return nfs4_open_expired(sp, state);
1770}
1771#endif
1772
aa53ed54
JL		 1773/*
1774 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1775 * fields corresponding to attributes that were used to store the verifier.
1776 * Make sure we clobber those fields in the later setattr call
1777 */
1778static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1779{
1780 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1781 !(sattr->ia_valid & ATTR_ATIME_SET))
1782 sattr->ia_valid |= ATTR_ATIME;
1783
1784 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1785 !(sattr->ia_valid & ATTR_MTIME_SET))
1786 sattr->ia_valid |= ATTR_MTIME;
1787}
1788
1da177e4 1789/*
24ac23ab 1790 * Returns a referenced nfs4_state
1da177e4 1791 */
82a2c1b7 1792static 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		 1793{
1794 struct nfs4_state_owner *sp;
1795 struct nfs4_state *state = NULL;
1796 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1797 struct nfs4_opendata *opendata;
aac00a8d 1798 int status;
1da177e4
LT		 1799
1800 /* Protect against reboot recovery conflicts */
1da177e4 1801 status = -ENOMEM;
d1e284d5
TM		 1802 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1803 if (sp == NULL) {
1da177e4
LT		 1804 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1805 goto out_err;
1806 }
58d9714a
TM		 1807 status = nfs4_recover_expired_lease(server);
1808 if (status != 0)
b4454fe1 1809 goto err_put_state_owner;
82a2c1b7
AV		 1810 if (dentry->d_inode != NULL)
1811 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1812 status = -ENOMEM;
82a2c1b7 1813 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1814 if (opendata == NULL)
95d35cb4 1815 goto err_put_state_owner;
1da177e4 1816
82a2c1b7
AV		 1817 if (dentry->d_inode != NULL)
1818 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1819
24ac23ab 1820 status = _nfs4_proc_open(opendata);
1da177e4 1821 if (status != 0)
c6d00e63 1822 goto err_opendata_put;
1da177e4 1823
24ac23ab 1824 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1825 status = PTR_ERR(state);
1826 if (IS_ERR(state))
c6d00e63 1827 goto err_opendata_put;
0df5dd4a 1828 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1829 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1830
1831 if (opendata->o_arg.open_flags & O_EXCL) {
1832 nfs4_exclusive_attrset(opendata, sattr);
1833
1834 nfs_fattr_init(opendata->o_res.f_attr);
1835 status = nfs4_do_setattr(state->inode, cred,
1836 opendata->o_res.f_attr, sattr,
1837 state);
1838 if (status == 0)
1839 nfs_setattr_update_inode(state->inode, sattr);
1840 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1841 }
c6d00e63 1842 nfs4_opendata_put(opendata);
1da177e4 1843 nfs4_put_state_owner(sp);
1da177e4
LT		 1844 *res = state;
1845 return 0;
c6d00e63
TM		 1846err_opendata_put:
1847 nfs4_opendata_put(opendata);
e56e0b78
TM		 1848err_put_state_owner:
1849 nfs4_put_state_owner(sp);
1da177e4 1850out_err:
1da177e4
LT		 1851 *res = NULL;
1852 return status;
1853}
1854
1855
82a2c1b7 1856static 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		 1857{
1858 struct nfs4_exception exception = { };
1859 struct nfs4_state *res;
1860 int status;
1861
1862 do {
82a2c1b7 1863 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1864 if (status == 0)
1865 break;
1866 /* NOTE: BAD_SEQID means the server and client disagree about the
1867 * book-keeping w.r.t. state-changing operations
1868 * (OPEN/CLOSE/LOCK/LOCKU...)
1869 * It is actually a sign of a bug on the client or on the server.
1870 *
1871 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1872 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1873 * have unhashed the old state_owner for us, and that we can
1874 * therefore safely retry using a new one. We should still warn
1875 * the user though...
1876 */
1877 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1878 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1879 " returned a bad sequence-id error!\n",
1880 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1881 exception.retry = 1;
1882 continue;
1883 }
550f5747
TM		 1884 /*
1885 * BAD_STATEID on OPEN means that the server cancelled our
1886 * state before it received the OPEN_CONFIRM.
1887 * Recover by retrying the request as per the discussion
1888 * on Page 181 of RFC3530.
1889 */
1890 if (status == -NFS4ERR_BAD_STATEID) {
1891 exception.retry = 1;
1892 continue;
1893 }
aac00a8d
TM		 1894 if (status == -EAGAIN) {
1895 /* We must have found a delegation */
1896 exception.retry = 1;
1897 continue;
1898 }
1da177e4
LT		 1899 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1900 status, &exception));
1901 } while (exception.retry);
1902 return res;
1903}
1904
659bfcd6
TM		 1905static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1906 struct nfs_fattr *fattr, struct iattr *sattr,
1907 struct nfs4_state *state)
1da177e4 1908{
3e4f6290 1909 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1910 struct nfs_setattrargs arg = {
3e4f6290 1911 .fh = NFS_FH(inode),
1da177e4
LT		 1912 .iap = sattr,
1913 .server = server,
1914 .bitmask = server->attr_bitmask,
1915 };
1916 struct nfs_setattrres res = {
1917 .fattr = fattr,
1918 .server = server,
1919 };
1920 struct rpc_message msg = {
659bfcd6
TM		 1921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1922 .rpc_argp = &arg,
1923 .rpc_resp = &res,
1924 .rpc_cred = cred,
1da177e4 1925 };
26e976a8 1926 unsigned long timestamp = jiffies;
65e4308d 1927 int status;
1da177e4 1928
0e574af1 1929 nfs_fattr_init(fattr);
1da177e4 1930
4fc8796d
TM		 1931 if (state != NULL) {
1932 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1933 current->files, current->tgid);
1934 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1935 FMODE_WRITE)) {
3e4f6290 1936 /* Use that stateid */
08e9eac4 1937 } else
f597c537 1938 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1939
7c513058 1940 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1941 if (status == 0 && state != NULL)
1942 renew_lease(server, timestamp);
65e4308d 1943 return status;
1da177e4
LT		 1944}
1945
659bfcd6
TM		 1946static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1947 struct nfs_fattr *fattr, struct iattr *sattr,
1948 struct nfs4_state *state)
1da177e4 1949{
3e4f6290 1950 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1951 struct nfs4_exception exception = {
1952 .state = state,
3114ea7a 1953 .inode = inode,
a1d0b5ee 1954 };
1da177e4
LT		 1955 int err;
1956 do {
451146be
TM		 1957 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
1958 switch (err) {
1959 case -NFS4ERR_OPENMODE:
1960 if (state && !(state->state & FMODE_WRITE)) {
1961 err = -EBADF;
1962 if (sattr->ia_valid & ATTR_OPEN)
1963 err = -EACCES;
1964 goto out;
1965 }
1966 }
1967 err = nfs4_handle_exception(server, err, &exception);
1da177e4 1968 } while (exception.retry);
451146be 1969out:
1da177e4
LT		 1970 return err;
1971}
1972
1973struct nfs4_closedata {
1974 struct inode *inode;
1975 struct nfs4_state *state;
1976 struct nfs_closeargs arg;
1977 struct nfs_closeres res;
516a6af6 1978 struct nfs_fattr fattr;
26e976a8 1979 unsigned long timestamp;
f7e8917a
FI		 1980 bool roc;
1981 u32 roc_barrier;
1da177e4
LT		 1982};
1983
963d8fe5 1984static void nfs4_free_closedata(void *data)
9512135d 1985{
963d8fe5
TM		 1986 struct nfs4_closedata *calldata = data;
1987 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1988 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1989
f7e8917a
FI		 1990 if (calldata->roc)
1991 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1992 nfs4_put_open_state(calldata->state);
1993 nfs_free_seqid(calldata->arg.seqid);
9512135d 1994 nfs4_put_state_owner(sp);
643168c2 1995 nfs_sb_deactive(sb);
9512135d
TM		 1996 kfree(calldata);
1997}
1998
88069f77
TM		 1999static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2000 fmode_t fmode)
2001{
2002 spin_lock(&state->owner->so_lock);
2003 if (!(fmode & FMODE_READ))
2004 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2005 if (!(fmode & FMODE_WRITE))
2006 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2007 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2008 spin_unlock(&state->owner->so_lock);
2009}
2010
963d8fe5 2011static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2012{
963d8fe5 2013 struct nfs4_closedata *calldata = data;
1da177e4 2014 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2015 struct nfs_server *server = NFS_SERVER(calldata->inode);
2016
a3ca5651 2017 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2018 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2019 return;
1da177e4
LT		 2020 /* hmm. we are done with the inode, and in the process of freeing
2021 * the state_owner. we keep this around to process errors
2022 */
1da177e4
LT		 2023 switch (task->tk_status) {
2024 case 0:
f7e8917a
FI		 2025 if (calldata->roc)
2026 pnfs_roc_set_barrier(state->inode,
2027 calldata->roc_barrier);
45328c35 2028 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2029 renew_lease(server, calldata->timestamp);
88069f77
TM		 2030 nfs4_close_clear_stateid_flags(state,
2031 calldata->arg.fmode);
1da177e4
LT		 2032 break;
2033 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2034 case -NFS4ERR_OLD_STATEID:
2035 case -NFS4ERR_BAD_STATEID:
1da177e4 2036 case -NFS4ERR_EXPIRED:
dc0b027d 2037 if (calldata->arg.fmode == 0)
9e33bed5 2038 break;
1da177e4 2039 default:
72211dbe
TM		 2040 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2041 rpc_restart_call_prepare(task);
1da177e4 2042 }
72211dbe 2043 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2044 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2045 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2046}
2047
4ce70ada 2048static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2049{
4ce70ada 2050 struct nfs4_closedata *calldata = data;
9512135d 2051 struct nfs4_state *state = calldata->state;
88069f77 2052 int call_close = 0;
9512135d 2053
a3ca5651 2054 dprintk("%s: begin!\n", __func__);
963d8fe5 2055 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2056 return;
003707c7 2057
88069f77
TM		 2058 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2059 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2060 spin_lock(&state->owner->so_lock);
003707c7 2061 /* Calculate the change in open mode */
e7616923 2062 if (state->n_rdwr == 0) {
003707c7 2063 if (state->n_rdonly == 0) {
88069f77
TM		 2064 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2065 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2066 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2067 }
2068 if (state->n_wronly == 0) {
88069f77
TM		 2069 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2070 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2071 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2072 }
e7616923 2073 }
4cecb76f 2074 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2075
2076 if (!call_close) {
963d8fe5
TM		 2077 /* Note: exit _without_ calling nfs4_close_done */
2078 task->tk_action = NULL;
a3ca5651 2079 goto out;
9512135d 2080 }
88069f77 2081
f7e8917a 2082 if (calldata->arg.fmode == 0) {
88069f77 2083 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2084 if (calldata->roc &&
2085 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2086 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2087 task, NULL);
a3ca5651 2088 goto out;
f7e8917a
FI		 2089 }
2090 }
88069f77 2091
516a6af6 2092 nfs_fattr_init(calldata->res.fattr);
26e976a8 2093 calldata->timestamp = jiffies;
035168ab 2094 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2095 &calldata->arg.seq_args,
2096 &calldata->res.seq_res,
2097 task))
a3ca5651 2098 goto out;
5138fde0 2099 rpc_call_start(task);
a3ca5651
CL		 2100out:
2101 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2102}
2103
963d8fe5 2104static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2105 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2106 .rpc_call_done = nfs4_close_done,
2107 .rpc_release = nfs4_free_closedata,
2108};
2109
1da177e4
LT		 2110/*
2111 * It is possible for data to be read/written from a mem-mapped file
2112 * after the sys_close call (which hits the vfs layer as a flush).
2113 * This means that we can't safely call nfsv4 close on a file until
2114 * the inode is cleared. This in turn means that we are not good
2115 * NFSv4 citizens - we do not indicate to the server to update the file's
2116 * share state even when we are done with one of the three share
2117 * stateid's in the inode.
2118 *
2119 * NOTE: Caller must be holding the sp->so_owner semaphore!
2120 */
643168c2 2121int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2122{
4a35bd41 2123 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2124 struct nfs4_closedata *calldata;
b39e625b
TM		 2125 struct nfs4_state_owner *sp = state->owner;
2126 struct rpc_task *task;
5138fde0
TM		 2127 struct rpc_message msg = {
2128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2129 .rpc_cred = state->owner->so_cred,
2130 };
c970aa85
TM		 2131 struct rpc_task_setup task_setup_data = {
2132 .rpc_client = server->client,
5138fde0 2133 .rpc_message = &msg,
c970aa85 2134 .callback_ops = &nfs4_close_ops,
101070ca 2135 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2136 .flags = RPC_TASK_ASYNC,
2137 };
9512135d 2138 int status = -ENOMEM;
1da177e4 2139
8535b2be 2140 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2141 if (calldata == NULL)
9512135d 2142 goto out;
9d12b216 2143 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2144 calldata->inode = state->inode;
1da177e4 2145 calldata->state = state;
4a35bd41 2146 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2147 calldata->arg.stateid = &state->open_stateid;
1da177e4 2148 /* Serialization for the sequence id */
8535b2be 2149 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2150 if (calldata->arg.seqid == NULL)
2151 goto out_free_calldata;
dc0b027d 2152 calldata->arg.fmode = 0;
a65318bf 2153 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2154 calldata->res.fattr = &calldata->fattr;
c1d51931 2155 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2156 calldata->res.server = server;
f7e8917a 2157 calldata->roc = roc;
643168c2 2158 nfs_sb_active(calldata->inode->i_sb);
9512135d 2159
1174dd1f
TM		 2160 msg.rpc_argp = &calldata->arg;
2161 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2162 task_setup_data.callback_data = calldata;
2163 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2164 if (IS_ERR(task))
2165 return PTR_ERR(task);
a49c3c77
TM		 2166 status = 0;
2167 if (wait)
2168 status = rpc_wait_for_completion_task(task);
b39e625b 2169 rpc_put_task(task);
a49c3c77 2170 return status;
9512135d
TM		 2171out_free_calldata:
2172 kfree(calldata);
2173out:
f7e8917a
FI		 2174 if (roc)
2175 pnfs_roc_release(state->inode);
b39e625b
TM		 2176 nfs4_put_open_state(state);
2177 nfs4_put_state_owner(sp);
9512135d 2178 return status;
1da177e4
LT		 2179}
2180
2b484297 2181static struct inode *
cd9a1c0e 2182nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2183{
1da177e4 2184 struct nfs4_state *state;
1da177e4 2185
565277f6 2186 /* Protect against concurrent sillydeletes */
3d4ff43d 2187 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2188 if (IS_ERR(state))
2189 return ERR_CAST(state);
cd9a1c0e 2190 ctx->state = state;
f46e0bd3 2191 return igrab(state->inode);
1da177e4
LT		 2192}
2193
1185a552 2194static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2195{
2196 if (ctx->state == NULL)
2197 return;
2198 if (is_sync)
643168c2 2199 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2200 else
643168c2 2201 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2202}
1da177e4
LT		 2203
2204static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2205{
43652ad5
BH		 2206 struct nfs4_server_caps_arg args = {
2207 .fhandle = fhandle,
2208 };
1da177e4
LT		 2209 struct nfs4_server_caps_res res = {};
2210 struct rpc_message msg = {
2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2212 .rpc_argp = &args,
1da177e4
LT		 2213 .rpc_resp = &res,
2214 };
2215 int status;
2216
7c513058 2217 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2218 if (status == 0) {
2219 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2220 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2221 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2222 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2223 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2224 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2225 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2226 server->caps |= NFS_CAP_ACLS;
2227 if (res.has_links != 0)
2228 server->caps |= NFS_CAP_HARDLINKS;
2229 if (res.has_symlinks != 0)
2230 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2231 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2232 server->caps |= NFS_CAP_FILEID;
2233 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2234 server->caps |= NFS_CAP_MODE;
2235 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2236 server->caps |= NFS_CAP_NLINK;
2237 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2238 server->caps |= NFS_CAP_OWNER;
2239 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2240 server->caps |= NFS_CAP_OWNER_GROUP;
2241 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2242 server->caps |= NFS_CAP_ATIME;
2243 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2244 server->caps |= NFS_CAP_CTIME;
2245 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2246 server->caps |= NFS_CAP_MTIME;
2247
a65318bf
TM		 2248 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2249 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2250 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2251 server->acl_bitmask = res.acl_bitmask;
264e6351 2252 server->fh_expire_type = res.fh_expire_type;
1da177e4 2253 }
cccef3b9 2254
1da177e4
LT		 2255 return status;
2256}
2257
55a97593 2258int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2259{
2260 struct nfs4_exception exception = { };
2261 int err;
2262 do {
2263 err = nfs4_handle_exception(server,
2264 _nfs4_server_capabilities(server, fhandle),
2265 &exception);
2266 } while (exception.retry);
2267 return err;
2268}
2269
2270static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2271 struct nfs_fsinfo *info)
2272{
1da177e4
LT		 2273 struct nfs4_lookup_root_arg args = {
2274 .bitmask = nfs4_fattr_bitmap,
2275 };
2276 struct nfs4_lookup_res res = {
2277 .server = server,
0e574af1 2278 .fattr = info->fattr,
1da177e4
LT		 2279 .fh = fhandle,
2280 };
2281 struct rpc_message msg = {
2282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2283 .rpc_argp = &args,
2284 .rpc_resp = &res,
2285 };
008f55d0 2286
0e574af1 2287 nfs_fattr_init(info->fattr);
7c513058 2288 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2289}
2290
2291static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2292 struct nfs_fsinfo *info)
2293{
2294 struct nfs4_exception exception = { };
2295 int err;
2296 do {
fb8a5ba8
BS		 2297 err = _nfs4_lookup_root(server, fhandle, info);
2298 switch (err) {
2299 case 0:
2300 case -NFS4ERR_WRONGSEC:
05e9cfb4 2301 goto out;
fb8a5ba8
BS		 2302 default:
2303 err = nfs4_handle_exception(server, err, &exception);
2304 }
1da177e4 2305 } while (exception.retry);
05e9cfb4 2306out:
1da177e4
LT		 2307 return err;
2308}
2309
8f70e95f
BS		 2310static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2311 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2312{
2313 struct rpc_auth *auth;
2314 int ret;
2315
2316 auth = rpcauth_create(flavor, server->client);
2317 if (!auth) {
2318 ret = -EIO;
2319 goto out;
2320 }
2321 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2322out:
2323 return ret;
2324}
2325
801a16dc 2326static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2327 struct nfs_fsinfo *info)
1da177e4 2328{
8f70e95f 2329 int i, len, status = 0;
0fabee24 2330 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2331
801a16dc
BS		 2332 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2333 flav_array[len] = RPC_AUTH_NULL;
2334 len += 1;
8f70e95f
BS		 2335
2336 for (i = 0; i < len; i++) {
2337 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2338 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2339 continue;
2340 break;
8f70e95f 2341 }
fb8a5ba8
BS		 2342 /*
2343 * -EACCESS could mean that the user doesn't have correct permissions
2344 * to access the mount. It could also mean that we tried to mount
2345 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2346 * existing mount programs don't handle -EACCES very well so it should
2347 * be mapped to -EPERM instead.
2348 */
2349 if (status == -EACCES)
2350 status = -EPERM;
801a16dc
BS		 2351 return status;
2352}
2353
2354/*
2355 * get the file handle for the "/" directory on the server
2356 */
2357static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2358 struct nfs_fsinfo *info)
2359{
fca78d6d 2360 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2361 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2362 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2363 /*
2364 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2365 * by nfs4_map_errors() as this function exits.
2366 */
fca78d6d 2367 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2368 if (status == 0)
2369 status = nfs4_server_capabilities(server, fhandle);
2370 if (status == 0)
2371 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2372 return nfs4_map_errors(status);
1da177e4
LT		 2373}
2374
6b97fd3d
MN		 2375/*
2376 * Get locations and (maybe) other attributes of a referral.
2377 * Note that we'll actually follow the referral later when
2378 * we detect fsid mismatch in inode revalidation
2379 */
f05d147f
BS		 2380static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2381 const struct qstr *name, struct nfs_fattr *fattr,
2382 struct nfs_fh *fhandle)
6b97fd3d
MN		 2383{
2384 int status = -ENOMEM;
2385 struct page *page = NULL;
2386 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2387
2388 page = alloc_page(GFP_KERNEL);
2389 if (page == NULL)
2390 goto out;
2391 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2392 if (locations == NULL)
2393 goto out;
2394
f05d147f 2395 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2396 if (status != 0)
2397 goto out;
2398 /* Make sure server returned a different fsid for the referral */
2399 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2400 dprintk("%s: server did not return a different fsid for"
2401 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2402 status = -EIO;
2403 goto out;
2404 }
533eb461
AA		 2405 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2406 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2407
533eb461 2408 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2409 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2410 memset(fhandle, 0, sizeof(struct nfs_fh));
2411out:
2412 if (page)
2413 __free_page(page);
5d7ca35a 2414 kfree(locations);
6b97fd3d
MN		 2415 return status;
2416}
2417
1da177e4
LT		 2418static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2419{
2420 struct nfs4_getattr_arg args = {
2421 .fh = fhandle,
2422 .bitmask = server->attr_bitmask,
2423 };
2424 struct nfs4_getattr_res res = {
2425 .fattr = fattr,
2426 .server = server,
2427 };
2428 struct rpc_message msg = {
2429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2430 .rpc_argp = &args,
2431 .rpc_resp = &res,
2432 };
2433
0e574af1 2434 nfs_fattr_init(fattr);
7c513058 2435 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2436}
2437
2438static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2439{
2440 struct nfs4_exception exception = { };
2441 int err;
2442 do {
2443 err = nfs4_handle_exception(server,
2444 _nfs4_proc_getattr(server, fhandle, fattr),
2445 &exception);
2446 } while (exception.retry);
2447 return err;
2448}
2449
2450/*
2451 * The file is not closed if it is opened due to the a request to change
2452 * the size of the file. The open call will not be needed once the
2453 * VFS layer lookup-intents are implemented.
2454 *
2455 * Close is called when the inode is destroyed.
2456 * If we haven't opened the file for O_WRONLY, we
2457 * need to in the size_change case to obtain a stateid.
2458 *
2459 * Got race?
2460 * Because OPEN is always done by name in nfsv4, it is
2461 * possible that we opened a different file by the same
2462 * name. We can recognize this race condition, but we
2463 * can't do anything about it besides returning an error.
2464 *
2465 * This will be fixed with VFS changes (lookup-intent).
2466 */
2467static int
2468nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2469 struct iattr *sattr)
2470{
08e9eac4 2471 struct inode *inode = dentry->d_inode;
659bfcd6 2472 struct rpc_cred *cred = NULL;
d530838b 2473 struct nfs4_state *state = NULL;
1da177e4
LT		 2474 int status;
2475
8a1636c4
BH		 2476 if (pnfs_ld_layoutret_on_setattr(inode))
2477 pnfs_return_layout(inode);
2478
0e574af1 2479 nfs_fattr_init(fattr);
1da177e4 2480
d530838b 2481 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2482 if (sattr->ia_valid & ATTR_FILE) {
2483 struct nfs_open_context *ctx;
2484
2485 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2486 if (ctx) {
2487 cred = ctx->cred;
2488 state = ctx->state;
2489 }
659bfcd6 2490 }
08e9eac4 2491
536e43d1
TM		 2492 /* Deal with open(O_TRUNC) */
2493 if (sattr->ia_valid & ATTR_OPEN)
2494 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2495
659bfcd6 2496 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2497 if (status == 0)
2498 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2499 return status;
2500}
2501
0c2e53f1
TM		 2502static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2503 const struct qstr *name, struct nfs_fh *fhandle,
2504 struct nfs_fattr *fattr)
2b3de441 2505{
0c2e53f1 2506 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2507 int status;
2508 struct nfs4_lookup_arg args = {
2509 .bitmask = server->attr_bitmask,
0c2e53f1 2510 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2511 .name = name,
2512 };
2513 struct nfs4_lookup_res res = {
2514 .server = server,
2515 .fattr = fattr,
2516 .fh = fhandle,
2517 };
2518 struct rpc_message msg = {
2519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2520 .rpc_argp = &args,
2521 .rpc_resp = &res,
2522 };
2523
2524 nfs_fattr_init(fattr);
2525
1da177e4 2526 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2527 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2528 dprintk("NFS reply lookup: %d\n", status);
2529 return status;
2530}
2531
72de53ec 2532static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2533{
7ebb9315 2534 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2535 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2536 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2537 fattr->nlink = 2;
2538}
2539
72de53ec
BS		 2540static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2541 struct qstr *name, struct nfs_fh *fhandle,
2542 struct nfs_fattr *fattr)
1da177e4
LT		 2543{
2544 struct nfs4_exception exception = { };
72de53ec 2545 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2546 int err;
2547 do {
72de53ec
BS		 2548 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2549 switch (err) {
08ef7bd3 2550 case -NFS4ERR_BADNAME:
72de53ec
BS		 2551 err = -ENOENT;
2552 goto out;
0c2e53f1 2553 case -NFS4ERR_MOVED:
f05d147f 2554 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2555 goto out;
0c2e53f1 2556 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2557 err = -EPERM;
2558 if (client != *clnt)
2559 goto out;
2560
2561 client = nfs4_create_sec_client(client, dir, name);
2562 if (IS_ERR(client))
2563 return PTR_ERR(client);
2564
2565 exception.retry = 1;
2566 break;
2567 default:
2568 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2569 }
1da177e4 2570 } while (exception.retry);
72de53ec
BS		 2571
2572out:
2573 if (err == 0)
2574 *clnt = client;
2575 else if (client != *clnt)
2576 rpc_shutdown_client(client);
2577
1da177e4
LT		 2578 return err;
2579}
2580
72de53ec
BS		 2581static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2582 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2583{
2584 int status;
2585 struct rpc_clnt *client = NFS_CLIENT(dir);
2586
2587 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2588 if (client != NFS_CLIENT(dir)) {
2589 rpc_shutdown_client(client);
2590 nfs_fixup_secinfo_attributes(fattr);
2591 }
2592 return status;
2593}
2594
f05d147f
BS		 2595struct rpc_clnt *
2596nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2597 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2598{
2599 int status;
2600 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2601
2602 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2603 if (status < 0) {
2604 rpc_shutdown_client(client);
2605 return ERR_PTR(status);
2606 }
2607 return client;
2608}
2609
1da177e4
LT		 2610static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2611{
76b32999 2612 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2613 struct nfs4_accessargs args = {
2614 .fh = NFS_FH(inode),
a4980e78 2615 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2616 };
2617 struct nfs4_accessres res = {
2618 .server = server,
1da177e4 2619 };
1da177e4
LT		 2620 struct rpc_message msg = {
2621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2622 .rpc_argp = &args,
2623 .rpc_resp = &res,
2624 .rpc_cred = entry->cred,
2625 };
2626 int mode = entry->mask;
2627 int status;
2628
2629 /*
2630 * Determine which access bits we want to ask for...
2631 */
2632 if (mode & MAY_READ)
2633 args.access |= NFS4_ACCESS_READ;
2634 if (S_ISDIR(inode->i_mode)) {
2635 if (mode & MAY_WRITE)
2636 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2637 if (mode & MAY_EXEC)
2638 args.access |= NFS4_ACCESS_LOOKUP;
2639 } else {
2640 if (mode & MAY_WRITE)
2641 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2642 if (mode & MAY_EXEC)
2643 args.access |= NFS4_ACCESS_EXECUTE;
2644 }
c407d41a
TM		 2645
2646 res.fattr = nfs_alloc_fattr();
2647 if (res.fattr == NULL)
2648 return -ENOMEM;
2649
7c513058 2650 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2651 if (!status) {
2652 entry->mask = 0;
2653 if (res.access & NFS4_ACCESS_READ)
2654 entry->mask |= MAY_READ;
2655 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2656 entry->mask |= MAY_WRITE;
2657 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2658 entry->mask |= MAY_EXEC;
c407d41a 2659 nfs_refresh_inode(inode, res.fattr);
1da177e4 2660 }
c407d41a 2661 nfs_free_fattr(res.fattr);
1da177e4
LT		 2662 return status;
2663}
2664
2665static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2666{
2667 struct nfs4_exception exception = { };
2668 int err;
2669 do {
2670 err = nfs4_handle_exception(NFS_SERVER(inode),
2671 _nfs4_proc_access(inode, entry),
2672 &exception);
2673 } while (exception.retry);
2674 return err;
2675}
2676
2677/*
2678 * TODO: For the time being, we don't try to get any attributes
2679 * along with any of the zero-copy operations READ, READDIR,
2680 * READLINK, WRITE.
2681 *
2682 * In the case of the first three, we want to put the GETATTR
2683 * after the read-type operation -- this is because it is hard
2684 * to predict the length of a GETATTR response in v4, and thus
2685 * align the READ data correctly. This means that the GETATTR
2686 * may end up partially falling into the page cache, and we should
2687 * shift it into the 'tail' of the xdr_buf before processing.
2688 * To do this efficiently, we need to know the total length
2689 * of data received, which doesn't seem to be available outside
2690 * of the RPC layer.
2691 *
2692 * In the case of WRITE, we also want to put the GETATTR after
2693 * the operation -- in this case because we want to make sure
2694 * we get the post-operation mtime and size. This means that
2695 * we can't use xdr_encode_pages() as written: we need a variant
2696 * of it which would leave room in the 'tail' iovec.
2697 *
2698 * Both of these changes to the XDR layer would in fact be quite
2699 * minor, but I decided to leave them for a subsequent patch.
2700 */
2701static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2702 unsigned int pgbase, unsigned int pglen)
2703{
2704 struct nfs4_readlink args = {
2705 .fh = NFS_FH(inode),
2706 .pgbase = pgbase,
2707 .pglen = pglen,
2708 .pages = &page,
2709 };
f50c7000 2710 struct nfs4_readlink_res res;
1da177e4
LT		 2711 struct rpc_message msg = {
2712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2713 .rpc_argp = &args,
f50c7000 2714 .rpc_resp = &res,
1da177e4
LT		 2715 };
2716
7c513058 2717 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2718}
2719
2720static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2721 unsigned int pgbase, unsigned int pglen)
2722{
2723 struct nfs4_exception exception = { };
2724 int err;
2725 do {
2726 err = nfs4_handle_exception(NFS_SERVER(inode),
2727 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2728 &exception);
2729 } while (exception.retry);
2730 return err;
2731}
2732
1da177e4
LT		 2733/*
2734 * Got race?
2735 * We will need to arrange for the VFS layer to provide an atomic open.
2736 * Until then, this create/open method is prone to inefficiency and race
2737 * conditions due to the lookup, create, and open VFS calls from sys_open()
2738 * placed on the wire.
2739 *
2740 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2741 * The file will be opened again in the subsequent VFS open call
2742 * (nfs4_proc_file_open).
2743 *
2744 * The open for read will just hang around to be used by any process that
2745 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2746 */
2747
2748static int
2749nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2750 int flags, struct nfs_open_context *ctx)
1da177e4 2751{
82a2c1b7 2752 struct dentry *de = dentry;
1da177e4 2753 struct nfs4_state *state;
c0204fd2
TM		 2754 struct rpc_cred *cred = NULL;
2755 fmode_t fmode = 0;
1da177e4
LT		 2756 int status = 0;
2757
c0204fd2
TM		 2758 if (ctx != NULL) {
2759 cred = ctx->cred;
3d4ff43d 2760 de = ctx->dentry;
c0204fd2 2761 fmode = ctx->mode;
1da177e4 2762 }
a8a5da99 2763 sattr->ia_mode &= ~current_umask();
82a2c1b7 2764 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2765 d_drop(dentry);
1da177e4
LT		 2766 if (IS_ERR(state)) {
2767 status = PTR_ERR(state);
c0204fd2 2768 goto out;
1da177e4 2769 }
d4d9cdcb 2770 d_add(dentry, igrab(state->inode));
d75340cc 2771 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2772 if (ctx != NULL)
2773 ctx->state = state;
02a913a7 2774 else
643168c2 2775 nfs4_close_sync(state, fmode);
1da177e4
LT		 2776out:
2777 return status;
2778}
2779
2780static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2781{
16e42959 2782 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2783 struct nfs_removeargs args = {
1da177e4 2784 .fh = NFS_FH(dir),
26fe5750 2785 .name = *name,
16e42959
TM		 2786 .bitmask = server->attr_bitmask,
2787 };
4fdc17b2 2788 struct nfs_removeres res = {
16e42959 2789 .server = server,
1da177e4 2790 };
1da177e4 2791 struct rpc_message msg = {
4fdc17b2
TM		 2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2793 .rpc_argp = &args,
2794 .rpc_resp = &res,
1da177e4 2795 };
d346890b
TM		 2796 int status = -ENOMEM;
2797
2798 res.dir_attr = nfs_alloc_fattr();
2799 if (res.dir_attr == NULL)
2800 goto out;
1da177e4 2801
7c513058 2802 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2803 if (status == 0) {
2804 update_changeattr(dir, &res.cinfo);
d346890b 2805 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2806 }
d346890b
TM		 2807 nfs_free_fattr(res.dir_attr);
2808out:
1da177e4
LT		 2809 return status;
2810}
2811
2812static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2813{
2814 struct nfs4_exception exception = { };
2815 int err;
2816 do {
2817 err = nfs4_handle_exception(NFS_SERVER(dir),
2818 _nfs4_proc_remove(dir, name),
2819 &exception);
2820 } while (exception.retry);
2821 return err;
2822}
2823
e4eff1a6 2824static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2825{
e4eff1a6
TM		 2826 struct nfs_server *server = NFS_SERVER(dir);
2827 struct nfs_removeargs *args = msg->rpc_argp;
2828 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2829
a65318bf 2830 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2831 res->server = server;
1da177e4 2832 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2833 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2834}
2835
34e137cc
BS		 2836static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2837{
2838 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2839 &data->args.seq_args,
2840 &data->res.seq_res,
2841 task))
2842 return;
2843 rpc_call_start(task);
1da177e4
LT		 2844}
2845
e4eff1a6 2846static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2847{
e4eff1a6
TM		 2848 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2849
14516c3a
TM		 2850 if (!nfs4_sequence_done(task, &res->seq_res))
2851 return 0;
9e33bed5 2852 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2853 return 0;
2854 update_changeattr(dir, &res->cinfo);
d346890b 2855 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2856 return 1;
1da177e4
LT		 2857}
2858
d3d4152a
JL		 2859static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2860{
2861 struct nfs_server *server = NFS_SERVER(dir);
2862 struct nfs_renameargs *arg = msg->rpc_argp;
2863 struct nfs_renameres *res = msg->rpc_resp;
2864
2865 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2866 arg->bitmask = server->attr_bitmask;
2867 res->server = server;
9d12b216 2868 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2869}
2870
c6bfa1a1
BS		 2871static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2872{
2873 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2874 &data->args.seq_args,
2875 &data->res.seq_res,
2876 task))
2877 return;
2878 rpc_call_start(task);
d3d4152a
JL		 2879}
2880
2881static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2882 struct inode *new_dir)
2883{
2884 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2885
2886 if (!nfs4_sequence_done(task, &res->seq_res))
2887 return 0;
2888 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2889 return 0;
2890
2891 update_changeattr(old_dir, &res->old_cinfo);
2892 nfs_post_op_update_inode(old_dir, res->old_fattr);
2893 update_changeattr(new_dir, &res->new_cinfo);
2894 nfs_post_op_update_inode(new_dir, res->new_fattr);
2895 return 1;
2896}
2897
1da177e4
LT		 2898static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2899 struct inode *new_dir, struct qstr *new_name)
2900{
6caf2c82 2901 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2902 struct nfs_renameargs arg = {
1da177e4
LT		 2903 .old_dir = NFS_FH(old_dir),
2904 .new_dir = NFS_FH(new_dir),
2905 .old_name = old_name,
2906 .new_name = new_name,
6caf2c82
TM		 2907 .bitmask = server->attr_bitmask,
2908 };
e8582a8b 2909 struct nfs_renameres res = {
6caf2c82 2910 .server = server,
1da177e4 2911 };
1da177e4
LT		 2912 struct rpc_message msg = {
2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2914 .rpc_argp = &arg,
2915 .rpc_resp = &res,
2916 };
011fff72 2917 int status = -ENOMEM;
1da177e4 2918
011fff72
TM		 2919 res.old_fattr = nfs_alloc_fattr();
2920 res.new_fattr = nfs_alloc_fattr();
2921 if (res.old_fattr == NULL || res.new_fattr == NULL)
2922 goto out;
1da177e4 2923
7c513058 2924 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2925 if (!status) {
2926 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2927 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2928 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2929 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2930 }
011fff72
TM		 2931out:
2932 nfs_free_fattr(res.new_fattr);
2933 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2934 return status;
2935}
2936
2937static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2938 struct inode *new_dir, struct qstr *new_name)
2939{
2940 struct nfs4_exception exception = { };
2941 int err;
2942 do {
2943 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2944 _nfs4_proc_rename(old_dir, old_name,
2945 new_dir, new_name),
2946 &exception);
2947 } while (exception.retry);
2948 return err;
2949}
2950
2951static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2952{
91ba2eee 2953 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2954 struct nfs4_link_arg arg = {
2955 .fh = NFS_FH(inode),
2956 .dir_fh = NFS_FH(dir),
2957 .name = name,
91ba2eee
TM		 2958 .bitmask = server->attr_bitmask,
2959 };
91ba2eee
TM		 2960 struct nfs4_link_res res = {
2961 .server = server,
1da177e4 2962 };
1da177e4
LT		 2963 struct rpc_message msg = {
2964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2965 .rpc_argp = &arg,
91ba2eee 2966 .rpc_resp = &res,
1da177e4 2967 };
136f2627
TM		 2968 int status = -ENOMEM;
2969
2970 res.fattr = nfs_alloc_fattr();
2971 res.dir_attr = nfs_alloc_fattr();
2972 if (res.fattr == NULL || res.dir_attr == NULL)
2973 goto out;
1da177e4 2974
7c513058 2975 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2976 if (!status) {
2977 update_changeattr(dir, &res.cinfo);
2978 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2979 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2980 }
136f2627
TM		 2981out:
2982 nfs_free_fattr(res.dir_attr);
2983 nfs_free_fattr(res.fattr);
1da177e4
LT		 2984 return status;
2985}
2986
2987static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991 do {
2992 err = nfs4_handle_exception(NFS_SERVER(inode),
2993 _nfs4_proc_link(inode, dir, name),
2994 &exception);
2995 } while (exception.retry);
2996 return err;
2997}
2998
57dc9a57
TM		 2999struct nfs4_createdata {
3000 struct rpc_message msg;
3001 struct nfs4_create_arg arg;
3002 struct nfs4_create_res res;
3003 struct nfs_fh fh;
3004 struct nfs_fattr fattr;
3005 struct nfs_fattr dir_fattr;
3006};
3007
3008static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3009 struct qstr *name, struct iattr *sattr, u32 ftype)
3010{
3011 struct nfs4_createdata *data;
3012
3013 data = kzalloc(sizeof(*data), GFP_KERNEL);
3014 if (data != NULL) {
3015 struct nfs_server *server = NFS_SERVER(dir);
3016
3017 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3018 data->msg.rpc_argp = &data->arg;
3019 data->msg.rpc_resp = &data->res;
3020 data->arg.dir_fh = NFS_FH(dir);
3021 data->arg.server = server;
3022 data->arg.name = name;
3023 data->arg.attrs = sattr;
3024 data->arg.ftype = ftype;
3025 data->arg.bitmask = server->attr_bitmask;
3026 data->res.server = server;
3027 data->res.fh = &data->fh;
3028 data->res.fattr = &data->fattr;
3029 data->res.dir_fattr = &data->dir_fattr;
3030 nfs_fattr_init(data->res.fattr);
3031 nfs_fattr_init(data->res.dir_fattr);
3032 }
3033 return data;
3034}
3035
3036static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3037{
7c513058 3038 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3039 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3040 if (status == 0) {
3041 update_changeattr(dir, &data->res.dir_cinfo);
3042 nfs_post_op_update_inode(dir, data->res.dir_fattr);
3043 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3044 }
3045 return status;
3046}
3047
3048static void nfs4_free_createdata(struct nfs4_createdata *data)
3049{
3050 kfree(data);
3051}
3052
4f390c15 3053static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3054 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3055{
57dc9a57
TM		 3056 struct nfs4_createdata *data;
3057 int status = -ENAMETOOLONG;
1da177e4 3058
94a6d753 3059 if (len > NFS4_MAXPATHLEN)
57dc9a57 3060 goto out;
4f390c15 3061
57dc9a57
TM		 3062 status = -ENOMEM;
3063 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3064 if (data == NULL)
3065 goto out;
3066
3067 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3068 data->arg.u.symlink.pages = &page;
3069 data->arg.u.symlink.len = len;
1da177e4 3070
57dc9a57
TM		 3071 status = nfs4_do_create(dir, dentry, data);
3072
3073 nfs4_free_createdata(data);
3074out:
1da177e4
LT		 3075 return status;
3076}
3077
4f390c15 3078static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3079 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3080{
3081 struct nfs4_exception exception = { };
3082 int err;
3083 do {
3084 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3085 _nfs4_proc_symlink(dir, dentry, page,
3086 len, sattr),
1da177e4
LT		 3087 &exception);
3088 } while (exception.retry);
3089 return err;
3090}
3091
3092static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3093 struct iattr *sattr)
3094{
57dc9a57
TM		 3095 struct nfs4_createdata *data;
3096 int status = -ENOMEM;
1da177e4 3097
57dc9a57
TM		 3098 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3099 if (data == NULL)
3100 goto out;
3101
3102 status = nfs4_do_create(dir, dentry, data);
3103
3104 nfs4_free_createdata(data);
3105out:
1da177e4
LT		 3106 return status;
3107}
3108
3109static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3110 struct iattr *sattr)
3111{
3112 struct nfs4_exception exception = { };
3113 int err;
a8a5da99
AK		 3114
3115 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3116 do {
3117 err = nfs4_handle_exception(NFS_SERVER(dir),
3118 _nfs4_proc_mkdir(dir, dentry, sattr),
3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3125 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3126{
3127 struct inode *dir = dentry->d_inode;
3128 struct nfs4_readdir_arg args = {
3129 .fh = NFS_FH(dir),
56e4ebf8 3130 .pages = pages,
1da177e4
LT		 3131 .pgbase = 0,
3132 .count = count,
96d25e53 3133 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3134 .plus = plus,
1da177e4
LT		 3135 };
3136 struct nfs4_readdir_res res;
3137 struct rpc_message msg = {
3138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3139 .rpc_argp = &args,
3140 .rpc_resp = &res,
3141 .rpc_cred = cred,
3142 };
3143 int status;
3144
3110ff80 3145 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3146 dentry->d_parent->d_name.name,
3147 dentry->d_name.name,
3148 (unsigned long long)cookie);
1da177e4
LT		 3149 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3150 res.pgbase = args.pgbase;
7c513058 3151 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3152 if (status >= 0) {
1da177e4 3153 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3154 status += args.pgbase;
3155 }
c4812998
TM		 3156
3157 nfs_invalidate_atime(dir);
3158
3110ff80 3159 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3160 return status;
3161}
3162
3163static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3164 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3165{
3166 struct nfs4_exception exception = { };
3167 int err;
3168 do {
3169 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3170 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3171 pages, count, plus),
1da177e4
LT		 3172 &exception);
3173 } while (exception.retry);
3174 return err;
3175}
3176
3177static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3178 struct iattr *sattr, dev_t rdev)
3179{
57dc9a57
TM		 3180 struct nfs4_createdata *data;
3181 int mode = sattr->ia_mode;
3182 int status = -ENOMEM;
1da177e4
LT		 3183
3184 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3185 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3186
3187 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3188 if (data == NULL)
3189 goto out;
3190
1da177e4 3191 if (S_ISFIFO(mode))
57dc9a57 3192 data->arg.ftype = NF4FIFO;
1da177e4 3193 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3194 data->arg.ftype = NF4BLK;
3195 data->arg.u.device.specdata1 = MAJOR(rdev);
3196 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3197 }
3198 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3199 data->arg.ftype = NF4CHR;
3200 data->arg.u.device.specdata1 = MAJOR(rdev);
3201 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3202 }
1da177e4 3203
57dc9a57
TM		 3204 status = nfs4_do_create(dir, dentry, data);
3205
3206 nfs4_free_createdata(data);
3207out:
1da177e4
LT		 3208 return status;
3209}
3210
3211static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3212 struct iattr *sattr, dev_t rdev)
3213{
3214 struct nfs4_exception exception = { };
3215 int err;
a8a5da99
AK		 3216
3217 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3218 do {
3219 err = nfs4_handle_exception(NFS_SERVER(dir),
3220 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3221 &exception);
3222 } while (exception.retry);
3223 return err;
3224}
3225
3226static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3227 struct nfs_fsstat *fsstat)
3228{
3229 struct nfs4_statfs_arg args = {
3230 .fh = fhandle,
3231 .bitmask = server->attr_bitmask,
3232 };
24ad148a
BH		 3233 struct nfs4_statfs_res res = {
3234 .fsstat = fsstat,
3235 };
1da177e4
LT		 3236 struct rpc_message msg = {
3237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3238 .rpc_argp = &args,
24ad148a 3239 .rpc_resp = &res,
1da177e4
LT		 3240 };
3241
0e574af1 3242 nfs_fattr_init(fsstat->fattr);
7c513058 3243 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3244}
3245
3246static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3247{
3248 struct nfs4_exception exception = { };
3249 int err;
3250 do {
3251 err = nfs4_handle_exception(server,
3252 _nfs4_proc_statfs(server, fhandle, fsstat),
3253 &exception);
3254 } while (exception.retry);
3255 return err;
3256}
3257
3258static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3259 struct nfs_fsinfo *fsinfo)
3260{
3261 struct nfs4_fsinfo_arg args = {
3262 .fh = fhandle,
3263 .bitmask = server->attr_bitmask,
3264 };
3dda5e43
BH		 3265 struct nfs4_fsinfo_res res = {
3266 .fsinfo = fsinfo,
3267 };
1da177e4
LT		 3268 struct rpc_message msg = {
3269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3270 .rpc_argp = &args,
3dda5e43 3271 .rpc_resp = &res,
1da177e4
LT		 3272 };
3273
7c513058 3274 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3275}
3276
3277static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3278{
3279 struct nfs4_exception exception = { };
3280 int err;
3281
3282 do {
3283 err = nfs4_handle_exception(server,
3284 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3285 &exception);
3286 } while (exception.retry);
3287 return err;
3288}
3289
3290static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3291{
0e574af1 3292 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3293 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3294}
3295
3296static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3297 struct nfs_pathconf *pathconf)
3298{
3299 struct nfs4_pathconf_arg args = {
3300 .fh = fhandle,
3301 .bitmask = server->attr_bitmask,
3302 };
d45b2989
BH		 3303 struct nfs4_pathconf_res res = {
3304 .pathconf = pathconf,
3305 };
1da177e4
LT		 3306 struct rpc_message msg = {
3307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3308 .rpc_argp = &args,
d45b2989 3309 .rpc_resp = &res,
1da177e4
LT		 3310 };
3311
3312 /* None of the pathconf attributes are mandatory to implement */
3313 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3314 memset(pathconf, 0, sizeof(*pathconf));
3315 return 0;
3316 }
3317
0e574af1 3318 nfs_fattr_init(pathconf->fattr);
7c513058 3319 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3320}
3321
3322static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3323 struct nfs_pathconf *pathconf)
3324{
3325 struct nfs4_exception exception = { };
3326 int err;
3327
3328 do {
3329 err = nfs4_handle_exception(server,
3330 _nfs4_proc_pathconf(server, fhandle, pathconf),
3331 &exception);
3332 } while (exception.retry);
3333 return err;
3334}
3335
d20581aa
BH		 3336void __nfs4_read_done_cb(struct nfs_read_data *data)
3337{
3338 nfs_invalidate_atime(data->inode);
3339}
3340
cbdabc7f 3341static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3342{
ec06c096 3343 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3344
9e33bed5 3345 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3346 rpc_restart_call_prepare(task);
ec06c096 3347 return -EAGAIN;
1da177e4 3348 }
8850df99 3349
d20581aa 3350 __nfs4_read_done_cb(data);
1da177e4 3351 if (task->tk_status > 0)
ec06c096
TM		 3352 renew_lease(server, data->timestamp);
3353 return 0;
1da177e4
LT		 3354}
3355
cbdabc7f
AA		 3356static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3357{
3358
3359 dprintk("--> %s\n", __func__);
3360
3361 if (!nfs4_sequence_done(task, &data->res.seq_res))
3362 return -EAGAIN;
3363
d20581aa
BH		 3364 return data->read_done_cb ? data->read_done_cb(task, data) :
3365 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3366}
3367
bdc7f021 3368static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3369{
1da177e4 3370 data->timestamp = jiffies;
cbdabc7f 3371 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3372 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3373 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3374}
3375
ea7c3303
BS		 3376static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3377{
3378 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3379 &data->args.seq_args,
3380 &data->res.seq_res,
3381 task))
3382 return;
3383 rpc_call_start(task);
1da177e4
LT		 3384}
3385
cbdabc7f
AA		 3386/* Reset the the nfs_read_data to send the read to the MDS. */
3387void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3388{
3389 dprintk("%s Reset task for i/o through\n", __func__);
3390 put_lseg(data->lseg);
3391 data->lseg = NULL;
3392 /* offsets will differ in the dense stripe case */
3393 data->args.offset = data->mds_offset;
3394 data->ds_clp = NULL;
3395 data->args.fh = NFS_FH(data->inode);
3396 data->read_done_cb = nfs4_read_done_cb;
3397 task->tk_ops = data->mds_ops;
3398 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3399}
3400EXPORT_SYMBOL_GPL(nfs4_reset_read);
3401
b029bc9b 3402static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3403{
1da177e4
LT		 3404 struct inode *inode = data->inode;
3405
9e33bed5 3406 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3407 rpc_restart_call_prepare(task);
788e7a89 3408 return -EAGAIN;
1da177e4 3409 }
4f9838c7 3410 if (task->tk_status >= 0) {
1da177e4 3411 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3412 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3413 }
788e7a89 3414 return 0;
1da177e4
LT		 3415}
3416
b029bc9b
FI		 3417static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3418{
3419 if (!nfs4_sequence_done(task, &data->res.seq_res))
3420 return -EAGAIN;
d20581aa
BH		 3421 return data->write_done_cb ? data->write_done_cb(task, data) :
3422 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3423}
3424
a69aef14
FI		 3425/* Reset the the nfs_write_data to send the write to the MDS. */
3426void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3427{
3428 dprintk("%s Reset task for i/o through\n", __func__);
3429 put_lseg(data->lseg);
3430 data->lseg = NULL;
3431 data->ds_clp = NULL;
3432 data->write_done_cb = nfs4_write_done_cb;
3433 data->args.fh = NFS_FH(data->inode);
3434 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3435 data->args.offset = data->mds_offset;
3436 data->res.fattr = &data->fattr;
3437 task->tk_ops = data->mds_ops;
3438 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3439}
3440EXPORT_SYMBOL_GPL(nfs4_reset_write);
3441
bdc7f021 3442static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3443{
bdc7f021
TM		 3444 struct nfs_server *server = NFS_SERVER(data->inode);
3445
7ffd1064
FI		 3446 if (data->lseg) {
3447 data->args.bitmask = NULL;
3448 data->res.fattr = NULL;
3449 } else
3450 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3451 if (!data->write_done_cb)
3452 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3453 data->res.server = server;
1da177e4
LT		 3454 data->timestamp = jiffies;
3455
bdc7f021 3456 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3457 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3458}
3459
c6cb80d0
BS		 3460static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3461{
3462 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3463 &data->args.seq_args,
3464 &data->res.seq_res,
3465 task))
3466 return;
3467 rpc_call_start(task);
1da177e4
LT		 3468}
3469
5f452431 3470static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3471{
1da177e4 3472 struct inode *inode = data->inode;
14516c3a 3473
9e33bed5 3474 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3475 rpc_restart_call_prepare(task);
788e7a89 3476 return -EAGAIN;
1da177e4 3477 }
9e08a3c5 3478 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3479 return 0;
1da177e4
LT		 3480}
3481
5f452431
FI		 3482static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3483{
3484 if (!nfs4_sequence_done(task, &data->res.seq_res))
3485 return -EAGAIN;
3486 return data->write_done_cb(task, data);
3487}
3488
bdc7f021 3489static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3490{
788e7a89 3491 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3492
3493 if (data->lseg) {
3494 data->args.bitmask = NULL;
3495 data->res.fattr = NULL;
3496 } else
3497 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3498 if (!data->write_done_cb)
3499 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3500 data->res.server = server;
bdc7f021 3501 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3502 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3503}
3504
9bc4e3ca
CL		 3505struct nfs4_renewdata {
3506 struct nfs_client *client;
3507 unsigned long timestamp;
3508};
3509
1da177e4
LT		 3510/*
3511 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3512 * standalone procedure for queueing an asynchronous RENEW.
3513 */
9bc4e3ca 3514static void nfs4_renew_release(void *calldata)
dc96aef9 3515{
9bc4e3ca
CL		 3516 struct nfs4_renewdata *data = calldata;
3517 struct nfs_client *clp = data->client;
dc96aef9 3518
0851de06
AB		 3519 if (atomic_read(&clp->cl_count) > 1)
3520 nfs4_schedule_state_renewal(clp);
3521 nfs_put_client(clp);
9bc4e3ca 3522 kfree(data);
dc96aef9
AB		 3523}
3524
9bc4e3ca 3525static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3526{
9bc4e3ca
CL		 3527 struct nfs4_renewdata *data = calldata;
3528 struct nfs_client *clp = data->client;
3529 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3530
3531 if (task->tk_status < 0) {
95baa25c 3532 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3533 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3534 return;
3535 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3536 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3537 return;
3538 }
3539 nfs4_schedule_path_down_recovery(clp);
1da177e4 3540 }
452e9352 3541 do_renew_lease(clp, timestamp);
1da177e4
LT		 3542}
3543
963d8fe5
TM		 3544static const struct rpc_call_ops nfs4_renew_ops = {
3545 .rpc_call_done = nfs4_renew_done,
dc96aef9 3546 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3547};
3548
2f60ea6b 3549static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3550{
3551 struct rpc_message msg = {
3552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3553 .rpc_argp = clp,
b4454fe1 3554 .rpc_cred = cred,
1da177e4 3555 };
9bc4e3ca 3556 struct nfs4_renewdata *data;
1da177e4 3557
2f60ea6b
TM		 3558 if (renew_flags == 0)
3559 return 0;
0851de06
AB		 3560 if (!atomic_inc_not_zero(&clp->cl_count))
3561 return -EIO;
b569ad34 3562 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3563 if (data == NULL)
3564 return -ENOMEM;
3565 data->client = clp;
3566 data->timestamp = jiffies;
1da177e4 3567 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3568 &nfs4_renew_ops, data);
1da177e4
LT		 3569}
3570
8534d4ec 3571static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3572{
3573 struct rpc_message msg = {
3574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3575 .rpc_argp = clp,
b4454fe1 3576 .rpc_cred = cred,
1da177e4
LT		 3577 };
3578 unsigned long now = jiffies;
3579 int status;
3580
3581 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3582 if (status < 0)
3583 return status;
452e9352 3584 do_renew_lease(clp, now);
1da177e4
LT		 3585 return 0;
3586}
3587
aa1870af
BF		 3588static inline int nfs4_server_supports_acls(struct nfs_server *server)
3589{
3590 return (server->caps & NFS_CAP_ACLS)
3591 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3592 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3593}
3594
3595/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3596 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3597 * the stack.
3598 */
3599#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3600
e9e3d724
NH		 3601static int buf_to_pages_noslab(const void *buf, size_t buflen,
3602 struct page **pages, unsigned int *pgbase)
3603{
3604 struct page *newpage, **spages;
3605 int rc = 0;
3606 size_t len;
3607 spages = pages;
3608
3609 do {
43b7c3f0 3610 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3611 newpage = alloc_page(GFP_KERNEL);
3612
3613 if (newpage == NULL)
3614 goto unwind;
3615 memcpy(page_address(newpage), buf, len);
3616 buf += len;
3617 buflen -= len;
3618 *pages++ = newpage;
3619 rc++;
3620 } while (buflen != 0);
3621
3622 return rc;
3623
3624unwind:
3625 for(; rc > 0; rc--)
3626 __free_page(spages[rc-1]);
3627 return -ENOMEM;
3628}
3629
e50a1c2e
BF		 3630struct nfs4_cached_acl {
3631 int cached;
3632 size_t len;
3e9d4154 3633 char data[0];
e50a1c2e
BF		 3634};
3635
3636static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3637{
3638 struct nfs_inode *nfsi = NFS_I(inode);
3639
3640 spin_lock(&inode->i_lock);
3641 kfree(nfsi->nfs4_acl);
3642 nfsi->nfs4_acl = acl;
3643 spin_unlock(&inode->i_lock);
3644}
3645
3646static void nfs4_zap_acl_attr(struct inode *inode)
3647{
3648 nfs4_set_cached_acl(inode, NULL);
3649}
3650
3651static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3652{
3653 struct nfs_inode *nfsi = NFS_I(inode);
3654 struct nfs4_cached_acl *acl;
3655 int ret = -ENOENT;
3656
3657 spin_lock(&inode->i_lock);
3658 acl = nfsi->nfs4_acl;
3659 if (acl == NULL)
3660 goto out;
3661 if (buf == NULL) /* user is just asking for length */
3662 goto out_len;
3663 if (acl->cached == 0)
3664 goto out;
3665 ret = -ERANGE; /* see getxattr(2) man page */
3666 if (acl->len > buflen)
3667 goto out;
3668 memcpy(buf, acl->data, acl->len);
3669out_len:
3670 ret = acl->len;
3671out:
3672 spin_unlock(&inode->i_lock);
3673 return ret;
3674}
3675
5794d21e 3676static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3677{
3678 struct nfs4_cached_acl *acl;
3679
5794d21e 3680 if (pages && acl_len <= PAGE_SIZE) {
e50a1c2e
BF		 3681 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3682 if (acl == NULL)
3683 goto out;
3684 acl->cached = 1;
5794d21e 3685 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3686 } else {
3687 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3688 if (acl == NULL)
3689 goto out;
3690 acl->cached = 0;
3691 }
3692 acl->len = acl_len;
3693out:
3694 nfs4_set_cached_acl(inode, acl);
3695}
3696
bf118a34
AA		 3697/*
3698 * The getxattr API returns the required buffer length when called with a
3699 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3700 * the required buf. On a NULL buf, we send a page of data to the server
3701 * guessing that the ACL request can be serviced by a page. If so, we cache
3702 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3703 * the cache. If not so, we throw away the page, and cache the required
3704 * length. The next getxattr call will then produce another round trip to
3705 * the server, this time with the input buf of the required size.
3706 */
16b4289c 3707static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3708{
bf118a34 3709 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3710 struct nfs_getaclargs args = {
3711 .fh = NFS_FH(inode),
3712 .acl_pages = pages,
3713 .acl_len = buflen,
3714 };
663c79b3
BH		 3715 struct nfs_getaclres res = {
3716 .acl_len = buflen,
3717 };
aa1870af
BF		 3718 struct rpc_message msg = {
3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3720 .rpc_argp = &args,
663c79b3 3721 .rpc_resp = &res,
aa1870af 3722 };
bf118a34 3723 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3724
bf118a34
AA		 3725 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3726 /* As long as we're doing a round trip to the server anyway,
3727 * let's be prepared for a page of acl data. */
3728 if (npages == 0)
3729 npages = 1;
3730
5a006899
SP		 3731 /* Add an extra page to handle the bitmap returned */
3732 npages++;
3733
bf118a34
AA		 3734 for (i = 0; i < npages; i++) {
3735 pages[i] = alloc_page(GFP_KERNEL);
3736 if (!pages[i])
3737 goto out_free;
e50a1c2e 3738 }
5a006899
SP		 3739
3740 /* for decoding across pages */
3741 res.acl_scratch = alloc_page(GFP_KERNEL);
3742 if (!res.acl_scratch)
3743 goto out_free;
3744
bf118a34
AA		 3745 args.acl_len = npages * PAGE_SIZE;
3746 args.acl_pgbase = 0;
5a006899 3747
bf118a34
AA		 3748 /* Let decode_getfacl know not to fail if the ACL data is larger than
3749 * the page we send as a guess */
3750 if (buf == NULL)
3751 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
bf118a34 3752
de040bec 3753 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3754 __func__, buf, buflen, npages, args.acl_len);
3755 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3756 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3757 if (ret)
3758 goto out_free;
bf118a34
AA		 3759
3760 acl_len = res.acl_len - res.acl_data_offset;
3761 if (acl_len > args.acl_len)
5794d21e 3762 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
e50a1c2e 3763 else
5794d21e 3764 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
bf118a34 3765 acl_len);
e50a1c2e
BF		 3766 if (buf) {
3767 ret = -ERANGE;
bf118a34 3768 if (acl_len > buflen)
e50a1c2e 3769 goto out_free;
bf118a34 3770 _copy_from_pages(buf, pages, res.acl_data_offset,
20e0fa98 3771 acl_len);
e50a1c2e 3772 }
bf118a34 3773 ret = acl_len;
e50a1c2e 3774out_free:
bf118a34
AA		 3775 for (i = 0; i < npages; i++)
3776 if (pages[i])
3777 __free_page(pages[i]);
331818f1
TM		 3778 if (res.acl_scratch)
3779 __free_page(res.acl_scratch);
aa1870af
BF		 3780 return ret;
3781}
3782
16b4289c
TM		 3783static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3784{
3785 struct nfs4_exception exception = { };
3786 ssize_t ret;
3787 do {
3788 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3789 if (ret >= 0)
3790 break;
3791 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3792 } while (exception.retry);
3793 return ret;
3794}
3795
e50a1c2e
BF		 3796static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3797{
3798 struct nfs_server *server = NFS_SERVER(inode);
3799 int ret;
3800
3801 if (!nfs4_server_supports_acls(server))
3802 return -EOPNOTSUPP;
3803 ret = nfs_revalidate_inode(server, inode);
3804 if (ret < 0)
3805 return ret;
08a22b39
AK		 3806 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3807 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3808 ret = nfs4_read_cached_acl(inode, buf, buflen);
3809 if (ret != -ENOENT)
bf118a34
AA		 3810 /* -ENOENT is returned if there is no ACL or if there is an ACL
3811 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3812 return ret;
3813 return nfs4_get_acl_uncached(inode, buf, buflen);
3814}
3815
16b4289c 3816static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3817{
3818 struct nfs_server *server = NFS_SERVER(inode);
3819 struct page *pages[NFS4ACL_MAXPAGES];
3820 struct nfs_setaclargs arg = {
3821 .fh = NFS_FH(inode),
3822 .acl_pages = pages,
3823 .acl_len = buflen,
3824 };
73c403a9 3825 struct nfs_setaclres res;
4b580ee3
BF		 3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3828 .rpc_argp = &arg,
73c403a9 3829 .rpc_resp = &res,
4b580ee3 3830 };
e9e3d724 3831 int ret, i;
4b580ee3
BF		 3832
3833 if (!nfs4_server_supports_acls(server))
3834 return -EOPNOTSUPP;
e9e3d724
NH		 3835 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3836 if (i < 0)
3837 return i;
642ac549 3838 nfs_inode_return_delegation(inode);
7c513058 3839 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3840
3841 /*
3842 * Free each page after tx, so the only ref left is
3843 * held by the network stack
3844 */
3845 for (; i > 0; i--)
3846 put_page(pages[i-1]);
3847
08a22b39
AK		 3848 /*
3849 * Acl update can result in inode attribute update.
3850 * so mark the attribute cache invalid.
3851 */
3852 spin_lock(&inode->i_lock);
3853 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3854 spin_unlock(&inode->i_lock);
f41f7418
TM		 3855 nfs_access_zap_cache(inode);
3856 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3857 return ret;
3858}
3859
16b4289c
TM		 3860static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3861{
3862 struct nfs4_exception exception = { };
3863 int err;
3864 do {
3865 err = nfs4_handle_exception(NFS_SERVER(inode),
3866 __nfs4_proc_set_acl(inode, buf, buflen),
3867 &exception);
3868 } while (exception.retry);
3869 return err;
3870}
3871
1da177e4 3872static int
aa5190d0 3873nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3874{
aa5190d0
TM		 3875 struct nfs_client *clp = server->nfs_client;
3876
3877 if (task->tk_status >= 0)
1da177e4
LT		 3878 return 0;
3879 switch(task->tk_status) {
a1d0b5ee 3880 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3881 case -NFS4ERR_ADMIN_REVOKED:
3882 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3883 if (state == NULL)
3884 break;
3885 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3886 case -NFS4ERR_OPENMODE:
3887 if (state == NULL)
3888 break;
0400a6b0
TM		 3889 nfs4_schedule_stateid_recovery(server, state);
3890 goto wait_on_recovery;
0ced63d1
TM		 3891 case -NFS4ERR_EXPIRED:
3892 if (state != NULL)
3893 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3894 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3895 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3896 nfs4_schedule_lease_recovery(clp);
3897 goto wait_on_recovery;
4745e315
AA		 3898#if defined(CONFIG_NFS_V4_1)
3899 case -NFS4ERR_BADSESSION:
3900 case -NFS4ERR_BADSLOT:
3901 case -NFS4ERR_BAD_HIGH_SLOT:
3902 case -NFS4ERR_DEADSESSION:
3903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3904 case -NFS4ERR_SEQ_FALSE_RETRY:
3905 case -NFS4ERR_SEQ_MISORDERED:
3906 dprintk("%s ERROR %d, Reset session\n", __func__,
3907 task->tk_status);
0400a6b0 3908 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3909 task->tk_status = 0;
3910 return -EAGAIN;
3911#endif /* CONFIG_NFS_V4_1 */
1da177e4 3912 case -NFS4ERR_DELAY:
aa5190d0 3913 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3914 case -NFS4ERR_GRACE:
2c643488 3915 case -EKEYEXPIRED:
1da177e4
LT		 3916 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3917 task->tk_status = 0;
3918 return -EAGAIN;
a8a4ae3a 3919 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3920 case -NFS4ERR_OLD_STATEID:
3921 task->tk_status = 0;
3922 return -EAGAIN;
3923 }
3924 task->tk_status = nfs4_map_errors(task->tk_status);
3925 return 0;
0400a6b0 3926wait_on_recovery:
a2c0b9e2 3927 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3928 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3929 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3930 task->tk_status = 0;
3931 return -EAGAIN;
1da177e4
LT		 3932}
3933
cd93710e
CL		 3934static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3935 nfs4_verifier *bootverf)
3936{
3937 __be32 verf[2];
3938
3939 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3940 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3941 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3942}
3943
bb8b27e5
TM		 3944int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3945 unsigned short port, struct rpc_cred *cred,
3946 struct nfs4_setclientid_res *res)
1da177e4
LT		 3947{
3948 nfs4_verifier sc_verifier;
3949 struct nfs4_setclientid setclientid = {
3950 .sc_verifier = &sc_verifier,
3951 .sc_prog = program,
f4eecd5d 3952 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3953 };
3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3956 .rpc_argp = &setclientid,
bb8b27e5 3957 .rpc_resp = res,
286d7d6a 3958 .rpc_cred = cred,
1da177e4 3959 };
1da177e4
LT		 3960 int loop = 0;
3961 int status;
3962
cd93710e 3963 nfs4_construct_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3964
3965 for(;;) {
2446ab60 3966 rcu_read_lock();
1da177e4 3967 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3968 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3969 clp->cl_ipaddr,
3970 rpc_peeraddr2str(clp->cl_rpcclient,
3971 RPC_DISPLAY_ADDR),
69dd716c
TM		 3972 rpc_peeraddr2str(clp->cl_rpcclient,
3973 RPC_DISPLAY_PROTO),
78ea323b 3974 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3975 clp->cl_id_uniquifier);
3976 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3977 sizeof(setclientid.sc_netid),
3978 rpc_peeraddr2str(clp->cl_rpcclient,
3979 RPC_DISPLAY_NETID));
1da177e4 3980 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3981 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 3982 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 3983 rcu_read_unlock();
1da177e4 3984
1bd714f2 3985 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3986 if (status != -NFS4ERR_CLID_INUSE)
3987 break;
fd954ae1
TM		 3988 if (loop != 0) {
3989 ++clp->cl_id_uniquifier;
1da177e4 3990 break;
fd954ae1
TM		 3991 }
3992 ++loop;
3993 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3994 }
3995 return status;
3996}
3997
fd954ae1 3998int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3999 struct nfs4_setclientid_res *arg,
4000 struct rpc_cred *cred)
1da177e4
LT		 4001{
4002 struct nfs_fsinfo fsinfo;
4003 struct rpc_message msg = {
4004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4005 .rpc_argp = arg,
1da177e4 4006 .rpc_resp = &fsinfo,
286d7d6a 4007 .rpc_cred = cred,
1da177e4
LT		 4008 };
4009 unsigned long now;
4010 int status;
4011
4012 now = jiffies;
1bd714f2 4013 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4014 if (status == 0) {
4015 spin_lock(&clp->cl_lock);
4016 clp->cl_lease_time = fsinfo.lease_time * HZ;
4017 clp->cl_last_renewal = now;
4018 spin_unlock(&clp->cl_lock);
4019 }
4020 return status;
4021}
4022
fe650407
TM		 4023struct nfs4_delegreturndata {
4024 struct nfs4_delegreturnargs args;
fa178f29 4025 struct nfs4_delegreturnres res;
fe650407
TM		 4026 struct nfs_fh fh;
4027 nfs4_stateid stateid;
26e976a8 4028 unsigned long timestamp;
fa178f29 4029 struct nfs_fattr fattr;
fe650407
TM		 4030 int rpc_status;
4031};
4032
fe650407
TM		 4033static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4034{
4035 struct nfs4_delegreturndata *data = calldata;
938e1010 4036
14516c3a
TM		 4037 if (!nfs4_sequence_done(task, &data->res.seq_res))
4038 return;
938e1010 4039
79708861
RL		 4040 switch (task->tk_status) {
4041 case -NFS4ERR_STALE_STATEID:
4042 case -NFS4ERR_EXPIRED:
4043 case 0:
fa178f29 4044 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4045 break;
4046 default:
4047 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4048 -EAGAIN) {
d00c5d43 4049 rpc_restart_call_prepare(task);
79708861
RL		 4050 return;
4051 }
4052 }
4053 data->rpc_status = task->tk_status;
fe650407
TM		 4054}
4055
4056static void nfs4_delegreturn_release(void *calldata)
4057{
fe650407
TM		 4058 kfree(calldata);
4059}
4060
938e1010
AA		 4061#if defined(CONFIG_NFS_V4_1)
4062static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4063{
4064 struct nfs4_delegreturndata *d_data;
4065
4066 d_data = (struct nfs4_delegreturndata *)data;
4067
035168ab 4068 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4069 &d_data->args.seq_args,
9d12b216 4070 &d_data->res.seq_res, task))
938e1010
AA		 4071 return;
4072 rpc_call_start(task);
4073}
4074#endif /* CONFIG_NFS_V4_1 */
4075
c8d149f3 4076static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4077#if defined(CONFIG_NFS_V4_1)
4078 .rpc_call_prepare = nfs4_delegreturn_prepare,
4079#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4080 .rpc_call_done = nfs4_delegreturn_done,
4081 .rpc_release = nfs4_delegreturn_release,
4082};
4083
e6f81075 4084static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4085{
4086 struct nfs4_delegreturndata *data;
fa178f29 4087 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4088 struct rpc_task *task;
5138fde0
TM		 4089 struct rpc_message msg = {
4090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4091 .rpc_cred = cred,
4092 };
c970aa85
TM		 4093 struct rpc_task_setup task_setup_data = {
4094 .rpc_client = server->client,
5138fde0 4095 .rpc_message = &msg,
c970aa85
TM		 4096 .callback_ops = &nfs4_delegreturn_ops,
4097 .flags = RPC_TASK_ASYNC,
4098 };
e6f81075 4099 int status = 0;
fe650407 4100
8535b2be 4101 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4102 if (data == NULL)
4103 return -ENOMEM;
9d12b216 4104 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4105 data->args.fhandle = &data->fh;
4106 data->args.stateid = &data->stateid;
fa178f29 4107 data->args.bitmask = server->attr_bitmask;
fe650407 4108 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4109 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4110 data->res.fattr = &data->fattr;
4111 data->res.server = server;
5138fde0 4112 nfs_fattr_init(data->res.fattr);
26e976a8 4113 data->timestamp = jiffies;
fe650407
TM		 4114 data->rpc_status = 0;
4115
c970aa85 4116 task_setup_data.callback_data = data;
1174dd1f
TM		 4117 msg.rpc_argp = &data->args;
4118 msg.rpc_resp = &data->res;
c970aa85 4119 task = rpc_run_task(&task_setup_data);
7a1218a2 4120 if (IS_ERR(task))
fe650407 4121 return PTR_ERR(task);
e6f81075
TM		 4122 if (!issync)
4123 goto out;
fe650407 4124 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4125 if (status != 0)
4126 goto out;
4127 status = data->rpc_status;
4128 if (status != 0)
4129 goto out;
4130 nfs_refresh_inode(inode, &data->fattr);
4131out:
e6b3c4db 4132 rpc_put_task(task);
fe650407 4133 return status;
1da177e4
LT		 4134}
4135
e6f81075 4136int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4137{
4138 struct nfs_server *server = NFS_SERVER(inode);
4139 struct nfs4_exception exception = { };
4140 int err;
4141 do {
e6f81075 4142 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4143 switch (err) {
4144 case -NFS4ERR_STALE_STATEID:
4145 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4146 case 0:
4147 return 0;
4148 }
4149 err = nfs4_handle_exception(server, err, &exception);
4150 } while (exception.retry);
4151 return err;
4152}
4153
4154#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4155#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4156
4157/*
4158 * sleep, with exponential backoff, and retry the LOCK operation.
4159 */
4160static unsigned long
4161nfs4_set_lock_task_retry(unsigned long timeout)
4162{
d310310c 4163 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4164 timeout <<= 1;
4165 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4166 return NFS4_LOCK_MAXTIMEOUT;
4167 return timeout;
4168}
4169
1da177e4
LT		 4170static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4171{
4172 struct inode *inode = state->inode;
4173 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4174 struct nfs_client *clp = server->nfs_client;
911d1aaf 4175 struct nfs_lockt_args arg = {
1da177e4 4176 .fh = NFS_FH(inode),
911d1aaf 4177 .fl = request,
1da177e4 4178 };
911d1aaf
TM		 4179 struct nfs_lockt_res res = {
4180 .denied = request,
1da177e4
LT		 4181 };
4182 struct rpc_message msg = {
4183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4184 .rpc_argp = &arg,
4185 .rpc_resp = &res,
4186 .rpc_cred = state->owner->so_cred,
4187 };
1da177e4
LT		 4188 struct nfs4_lock_state *lsp;
4189 int status;
4190
911d1aaf 4191 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4192 status = nfs4_set_lock_state(state, request);
4193 if (status != 0)
4194 goto out;
4195 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4196 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4197 arg.lock_owner.s_dev = server->s_dev;
7c513058 4198 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4199 switch (status) {
4200 case 0:
4201 request->fl_type = F_UNLCK;
4202 break;
4203 case -NFS4ERR_DENIED:
4204 status = 0;
1da177e4 4205 }
70cc6487 4206 request->fl_ops->fl_release_private(request);
8d0a8a9d 4207out:
1da177e4
LT		 4208 return status;
4209}
4210
4211static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4212{
4213 struct nfs4_exception exception = { };
4214 int err;
4215
4216 do {
4217 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4218 _nfs4_proc_getlk(state, cmd, request),
4219 &exception);
4220 } while (exception.retry);
4221 return err;
4222}
4223
4224static int do_vfs_lock(struct file *file, struct file_lock *fl)
4225{
4226 int res = 0;
4227 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4228 case FL_POSIX:
4229 res = posix_lock_file_wait(file, fl);
4230 break;
4231 case FL_FLOCK:
4232 res = flock_lock_file_wait(file, fl);
4233 break;
4234 default:
4235 BUG();
4236 }
1da177e4
LT		 4237 return res;
4238}
4239
faf5f49c 4240struct nfs4_unlockdata {
911d1aaf
TM		 4241 struct nfs_locku_args arg;
4242 struct nfs_locku_res res;
faf5f49c
TM		 4243 struct nfs4_lock_state *lsp;
4244 struct nfs_open_context *ctx;
911d1aaf
TM		 4245 struct file_lock fl;
4246 const struct nfs_server *server;
26e976a8 4247 unsigned long timestamp;
faf5f49c
TM		 4248};
4249
911d1aaf
TM		 4250static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4251 struct nfs_open_context *ctx,
4252 struct nfs4_lock_state *lsp,
4253 struct nfs_seqid *seqid)
4254{
4255 struct nfs4_unlockdata *p;
4256 struct inode *inode = lsp->ls_state->inode;
4257
8535b2be 4258 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4259 if (p == NULL)
4260 return NULL;
4261 p->arg.fh = NFS_FH(inode);
4262 p->arg.fl = &p->fl;
4263 p->arg.seqid = seqid;
c1d51931 4264 p->res.seqid = seqid;
911d1aaf
TM		 4265 p->arg.stateid = &lsp->ls_stateid;
4266 p->lsp = lsp;
4267 atomic_inc(&lsp->ls_count);
4268 /* Ensure we don't close file until we're done freeing locks! */
4269 p->ctx = get_nfs_open_context(ctx);
4270 memcpy(&p->fl, fl, sizeof(p->fl));
4271 p->server = NFS_SERVER(inode);
4272 return p;
4273}
4274
06f814a3 4275static void nfs4_locku_release_calldata(void *data)
faf5f49c 4276{
963d8fe5 4277 struct nfs4_unlockdata *calldata = data;
911d1aaf 4278 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4279 nfs4_put_lock_state(calldata->lsp);
4280 put_nfs_open_context(calldata->ctx);
4281 kfree(calldata);
faf5f49c
TM		 4282}
4283
963d8fe5 4284static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4285{
963d8fe5 4286 struct nfs4_unlockdata *calldata = data;
faf5f49c 4287
14516c3a
TM		 4288 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4289 return;
faf5f49c
TM		 4290 switch (task->tk_status) {
4291 case 0:
f597c537
TM		 4292 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4293 &calldata->res.stateid);
26e976a8 4294 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4295 break;
9e33bed5
TM		 4296 case -NFS4ERR_BAD_STATEID:
4297 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4298 case -NFS4ERR_STALE_STATEID:
4299 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4300 break;
4301 default:
9e33bed5 4302 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4303 rpc_restart_call_prepare(task);
faf5f49c 4304 }
faf5f49c
TM		 4305}
4306
4ce70ada 4307static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4308{
4ce70ada 4309 struct nfs4_unlockdata *calldata = data;
faf5f49c 4310
911d1aaf 4311 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4312 return;
4313 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4314 /* Note: exit _without_ running nfs4_locku_done */
4315 task->tk_action = NULL;
faf5f49c
TM		 4316 return;
4317 }
26e976a8 4318 calldata->timestamp = jiffies;
035168ab 4319 if (nfs4_setup_sequence(calldata->server,
a893693c 4320 &calldata->arg.seq_args,
9d12b216 4321 &calldata->res.seq_res, task))
a893693c 4322 return;
5138fde0 4323 rpc_call_start(task);
faf5f49c
TM		 4324}
4325
963d8fe5 4326static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4327 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4328 .rpc_call_done = nfs4_locku_done,
06f814a3 4329 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4330};
4331
a5d16a4d
TM		 4332static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4333 struct nfs_open_context *ctx,
4334 struct nfs4_lock_state *lsp,
4335 struct nfs_seqid *seqid)
4336{
4337 struct nfs4_unlockdata *data;
5138fde0
TM		 4338 struct rpc_message msg = {
4339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4340 .rpc_cred = ctx->cred,
4341 };
c970aa85
TM		 4342 struct rpc_task_setup task_setup_data = {
4343 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4344 .rpc_message = &msg,
c970aa85 4345 .callback_ops = &nfs4_locku_ops,
101070ca 4346 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4347 .flags = RPC_TASK_ASYNC,
4348 };
a5d16a4d 4349
137d6aca
FF		 4350 /* Ensure this is an unlock - when canceling a lock, the
4351 * canceled lock is passed in, and it won't be an unlock.
4352 */
4353 fl->fl_type = F_UNLCK;
4354
a5d16a4d
TM		 4355 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4356 if (data == NULL) {
4357 nfs_free_seqid(seqid);
4358 return ERR_PTR(-ENOMEM);
4359 }
4360
9d12b216 4361 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4362 msg.rpc_argp = &data->arg;
4363 msg.rpc_resp = &data->res;
c970aa85
TM		 4364 task_setup_data.callback_data = data;
4365 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4366}
4367
faf5f49c
TM		 4368static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4369{
19e03c57 4370 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4371 struct nfs_seqid *seqid;
1da177e4 4372 struct nfs4_lock_state *lsp;
06f814a3
TM		 4373 struct rpc_task *task;
4374 int status = 0;
536ff0f8 4375 unsigned char fl_flags = request->fl_flags;
faf5f49c 4376
8d0a8a9d 4377 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4378 /* Unlock _before_ we do the RPC call */
4379 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4380 down_read(&nfsi->rwsem);
4381 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4382 up_read(&nfsi->rwsem);
9b073574 4383 goto out;
19e03c57
TM		 4384 }
4385 up_read(&nfsi->rwsem);
8d0a8a9d 4386 if (status != 0)
9b073574
TM		 4387 goto out;
4388 /* Is this a delegated lock? */
4389 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4390 goto out;
8d0a8a9d 4391 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4392 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4393 status = -ENOMEM;
911d1aaf 4394 if (seqid == NULL)
9b073574 4395 goto out;
cd3758e3 4396 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4397 status = PTR_ERR(task);
4398 if (IS_ERR(task))
9b073574 4399 goto out;
a5d16a4d 4400 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4401 rpc_put_task(task);
9b073574 4402out:
536ff0f8 4403 request->fl_flags = fl_flags;
1da177e4
LT		 4404 return status;
4405}
4406
a5d16a4d
TM		 4407struct nfs4_lockdata {
4408 struct nfs_lock_args arg;
4409 struct nfs_lock_res res;
4410 struct nfs4_lock_state *lsp;
4411 struct nfs_open_context *ctx;
4412 struct file_lock fl;
26e976a8 4413 unsigned long timestamp;
a5d16a4d
TM		 4414 int rpc_status;
4415 int cancelled;
66179efe 4416 struct nfs_server *server;
a5d16a4d
TM		 4417};
4418
4419static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4420 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4421 gfp_t gfp_mask)
1da177e4 4422{
a5d16a4d
TM		 4423 struct nfs4_lockdata *p;
4424 struct inode *inode = lsp->ls_state->inode;
1da177e4 4425 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4426
8535b2be 4427 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4428 if (p == NULL)
4429 return NULL;
4430
4431 p->arg.fh = NFS_FH(inode);
4432 p->arg.fl = &p->fl;
8535b2be 4433 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4434 if (p->arg.open_seqid == NULL)
4435 goto out_free;
8535b2be 4436 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4437 if (p->arg.lock_seqid == NULL)
2f74c0a0 4438 goto out_free_seqid;
a5d16a4d 4439 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4440 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4441 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4442 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4443 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4444 p->lsp = lsp;
66179efe 4445 p->server = server;
a5d16a4d
TM		 4446 atomic_inc(&lsp->ls_count);
4447 p->ctx = get_nfs_open_context(ctx);
4448 memcpy(&p->fl, fl, sizeof(p->fl));
4449 return p;
2f74c0a0
TM		 4450out_free_seqid:
4451 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4452out_free:
4453 kfree(p);
4454 return NULL;
4455}
4456
4457static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4458{
4459 struct nfs4_lockdata *data = calldata;
4460 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4461
3110ff80 4462 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4463 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4464 return;
a5d16a4d
TM		 4465 /* Do we need to do an open_to_lock_owner? */
4466 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4467 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4468 return;
a5d16a4d
TM		 4469 data->arg.open_stateid = &state->stateid;
4470 data->arg.new_lock_owner = 1;
c1d51931 4471 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4472 } else
4473 data->arg.new_lock_owner = 0;
26e976a8 4474 data->timestamp = jiffies;
035168ab
TM		 4475 if (nfs4_setup_sequence(data->server,
4476 &data->arg.seq_args,
9d12b216 4477 &data->res.seq_res, task))
66179efe 4478 return;
5138fde0 4479 rpc_call_start(task);
3110ff80 4480 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4481}
4482
b257957e
AB		 4483static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4484{
4485 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4486 nfs4_lock_prepare(task, calldata);
4487}
4488
a5d16a4d
TM		 4489static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4490{
4491 struct nfs4_lockdata *data = calldata;
4492
3110ff80 4493 dprintk("%s: begin!\n", __func__);
a5d16a4d 4494
14516c3a
TM		 4495 if (!nfs4_sequence_done(task, &data->res.seq_res))
4496 return;
66179efe 4497
a5d16a4d 4498 data->rpc_status = task->tk_status;
a5d16a4d 4499 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4500 if (data->rpc_status == 0)
4501 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4502 else
4503 goto out;
4504 }
4505 if (data->rpc_status == 0) {
f597c537 4506 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4507 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4508 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4509 }
a5d16a4d 4510out:
3110ff80 4511 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4512}
4513
4514static void nfs4_lock_release(void *calldata)
4515{
4516 struct nfs4_lockdata *data = calldata;
4517
3110ff80 4518 dprintk("%s: begin!\n", __func__);
2f74c0a0 4519 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4520 if (data->cancelled != 0) {
4521 struct rpc_task *task;
4522 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4523 data->arg.lock_seqid);
4524 if (!IS_ERR(task))
bf294b41 4525 rpc_put_task_async(task);
3110ff80 4526 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4527 } else
4528 nfs_free_seqid(data->arg.lock_seqid);
4529 nfs4_put_lock_state(data->lsp);
4530 put_nfs_open_context(data->ctx);
4531 kfree(data);
3110ff80 4532 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4533}
4534
4535static const struct rpc_call_ops nfs4_lock_ops = {
4536 .rpc_call_prepare = nfs4_lock_prepare,
4537 .rpc_call_done = nfs4_lock_done,
4538 .rpc_release = nfs4_lock_release,
4539};
4540
b257957e
AB		 4541static const struct rpc_call_ops nfs4_recover_lock_ops = {
4542 .rpc_call_prepare = nfs4_recover_lock_prepare,
4543 .rpc_call_done = nfs4_lock_done,
4544 .rpc_release = nfs4_lock_release,
4545};
4546
2bee72a6
TM		 4547static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4548{
2bee72a6
TM		 4549 switch (error) {
4550 case -NFS4ERR_ADMIN_REVOKED:
4551 case -NFS4ERR_BAD_STATEID:
ecac799a 4552 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4553 if (new_lock_owner != 0 ||
4554 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4555 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4556 break;
4557 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4558 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4559 case -NFS4ERR_EXPIRED:
4560 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4561 };
4562}
4563
afe6c27c 4564static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4565{
4566 struct nfs4_lockdata *data;
4567 struct rpc_task *task;
5138fde0
TM		 4568 struct rpc_message msg = {
4569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4570 .rpc_cred = state->owner->so_cred,
4571 };
c970aa85
TM		 4572 struct rpc_task_setup task_setup_data = {
4573 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4574 .rpc_message = &msg,
c970aa85 4575 .callback_ops = &nfs4_lock_ops,
101070ca 4576 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4577 .flags = RPC_TASK_ASYNC,
4578 };
a5d16a4d
TM		 4579 int ret;
4580
3110ff80 4581 dprintk("%s: begin!\n", __func__);
cd3758e3 4582 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4583 fl->fl_u.nfs4_fl.owner,
4584 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4585 if (data == NULL)
4586 return -ENOMEM;
4587 if (IS_SETLKW(cmd))
4588 data->arg.block = 1;
b257957e
AB		 4589 if (recovery_type > NFS_LOCK_NEW) {
4590 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4591 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4592 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4593 }
9d12b216 4594 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4595 msg.rpc_argp = &data->arg;
4596 msg.rpc_resp = &data->res;
c970aa85
TM		 4597 task_setup_data.callback_data = data;
4598 task = rpc_run_task(&task_setup_data);
7a1218a2 4599 if (IS_ERR(task))
a5d16a4d 4600 return PTR_ERR(task);
a5d16a4d
TM		 4601 ret = nfs4_wait_for_completion_rpc_task(task);
4602 if (ret == 0) {
4603 ret = data->rpc_status;
2bee72a6
TM		 4604 if (ret)
4605 nfs4_handle_setlk_error(data->server, data->lsp,
4606 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4607 } else
4608 data->cancelled = 1;
e6b3c4db 4609 rpc_put_task(task);
3110ff80 4610 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4611 return ret;
1da177e4
LT		 4612}
4613
4614static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4615{
202b50dc 4616 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4617 struct nfs4_exception exception = {
4618 .inode = state->inode,
4619 };
202b50dc
TM		 4620 int err;
4621
4622 do {
42a2d13e
TM		 4623 /* Cache the lock if possible... */
4624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4625 return 0;
afe6c27c 4626 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4627 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4628 break;
4629 nfs4_handle_exception(server, err, &exception);
4630 } while (exception.retry);
4631 return err;
1da177e4
LT		 4632}
4633
4634static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4635{
202b50dc 4636 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4637 struct nfs4_exception exception = {
4638 .inode = state->inode,
4639 };
202b50dc
TM		 4640 int err;
4641
6bfc93ef
TM		 4642 err = nfs4_set_lock_state(state, request);
4643 if (err != 0)
4644 return err;
202b50dc 4645 do {
42a2d13e
TM		 4646 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4647 return 0;
afe6c27c 4648 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4649 switch (err) {
4650 default:
4651 goto out;
4652 case -NFS4ERR_GRACE:
4653 case -NFS4ERR_DELAY:
4654 nfs4_handle_exception(server, err, &exception);
4655 err = 0;
4656 }
202b50dc 4657 } while (exception.retry);
a9ed2e25 4658out:
202b50dc 4659 return err;
1da177e4
LT		 4660}
4661
f062eb6c 4662#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4663static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4664{
b01dd1d8
BS		 4665 int status, ret = NFS_OK;
4666 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4667 struct nfs_server *server = NFS_SERVER(state->inode);
4668
b01dd1d8
BS		 4669 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4670 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4671 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4672 if (status != NFS_OK) {
4673 nfs41_free_stateid(server, &lsp->ls_stateid);
4674 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4675 ret = status;
4676 }
4677 }
4678 };
4679
4680 return ret;
4681}
4682
4683static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4684{
4685 int status = NFS_OK;
4686
4687 if (test_bit(LK_STATE_IN_USE, &state->flags))
4688 status = nfs41_check_expired_locks(state);
f062eb6c 4689 if (status == NFS_OK)
b01dd1d8 4690 return status;
f062eb6c
BS		 4691 return nfs4_lock_expired(state, request);
4692}
4693#endif
4694
1da177e4
LT		 4695static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4696{
19e03c57 4697 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4698 unsigned char fl_flags = request->fl_flags;
8e469ebd 4699 int status = -ENOLCK;
1da177e4 4700
8e469ebd
TM		 4701 if ((fl_flags & FL_POSIX) &&
4702 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4703 goto out;
6bfc93ef 4704 /* Is this a delegated open? */
6bfc93ef
TM		 4705 status = nfs4_set_lock_state(state, request);
4706 if (status != 0)
4707 goto out;
01c3b861
TM		 4708 request->fl_flags |= FL_ACCESS;
4709 status = do_vfs_lock(request->fl_file, request);
4710 if (status < 0)
4711 goto out;
19e03c57 4712 down_read(&nfsi->rwsem);
01c3b861 4713 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4714 /* Yes: cache locks! */
01c3b861 4715 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4716 request->fl_flags = fl_flags & ~FL_SLEEP;
4717 status = do_vfs_lock(request->fl_file, request);
4718 goto out_unlock;
01c3b861 4719 }
afe6c27c 4720 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4721 if (status != 0)
01c3b861 4722 goto out_unlock;
6bfc93ef 4723 /* Note: we always want to sleep here! */
01c3b861 4724 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4725 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4726 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4727 "manager!\n", __func__);
01c3b861 4728out_unlock:
19e03c57 4729 up_read(&nfsi->rwsem);
01c3b861
TM		 4730out:
4731 request->fl_flags = fl_flags;
1da177e4
LT		 4732 return status;
4733}
4734
4735static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4736{
a1d0b5ee
TM		 4737 struct nfs4_exception exception = {
4738 .state = state,
05ffe24f 4739 .inode = state->inode,
a1d0b5ee 4740 };
1da177e4
LT		 4741 int err;
4742
4743 do {
965b5d67
TM		 4744 err = _nfs4_proc_setlk(state, cmd, request);
4745 if (err == -NFS4ERR_DENIED)
4746 err = -EAGAIN;
1da177e4 4747 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4748 err, &exception);
1da177e4
LT		 4749 } while (exception.retry);
4750 return err;
4751}
4752
4753static int
4754nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4755{
4756 struct nfs_open_context *ctx;
4757 struct nfs4_state *state;
4758 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4759 int status;
4760
4761 /* verify open state */
cd3758e3 4762 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4763 state = ctx->state;
4764
4765 if (request->fl_start < 0 || request->fl_end < 0)
4766 return -EINVAL;
4767
d953126a
TM		 4768 if (IS_GETLK(cmd)) {
4769 if (state != NULL)
4770 return nfs4_proc_getlk(state, F_GETLK, request);
4771 return 0;
4772 }
1da177e4
LT		 4773
4774 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4775 return -EINVAL;
4776
d953126a
TM		 4777 if (request->fl_type == F_UNLCK) {
4778 if (state != NULL)
4779 return nfs4_proc_unlck(state, cmd, request);
4780 return 0;
4781 }
1da177e4 4782
d953126a
TM		 4783 if (state == NULL)
4784 return -ENOLCK;
55725513
TM		 4785 /*
4786 * Don't rely on the VFS having checked the file open mode,
4787 * since it won't do this for flock() locks.
4788 */
4789 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4790 case F_RDLCK:
4791 if (!(filp->f_mode & FMODE_READ))
4792 return -EBADF;
4793 break;
4794 case F_WRLCK:
4795 if (!(filp->f_mode & FMODE_WRITE))
4796 return -EBADF;
4797 }
4798
1da177e4
LT		 4799 do {
4800 status = nfs4_proc_setlk(state, cmd, request);
4801 if ((status != -EAGAIN) || IS_SETLK(cmd))
4802 break;
4803 timeout = nfs4_set_lock_task_retry(timeout);
4804 status = -ERESTARTSYS;
4805 if (signalled())
4806 break;
4807 } while(status < 0);
1da177e4
LT		 4808 return status;
4809}
4810
888e694c
TM		 4811int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4812{
4813 struct nfs_server *server = NFS_SERVER(state->inode);
4814 struct nfs4_exception exception = { };
4815 int err;
4816
4817 err = nfs4_set_lock_state(state, fl);
4818 if (err != 0)
4819 goto out;
4820 do {
afe6c27c 4821 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4822 switch (err) {
4823 default:
a030889a
WAA		 4824 printk(KERN_ERR "NFS: %s: unhandled error "
4825 "%d.\n", __func__, err);
d5122201 4826 case 0:
965b5d67 4827 case -ESTALE:
d5122201
TM		 4828 goto out;
4829 case -NFS4ERR_EXPIRED:
0ced63d1 4830 nfs4_schedule_stateid_recovery(server, state);
d5122201 4831 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4832 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4833 nfs4_schedule_lease_recovery(server->nfs_client);
4834 goto out;
74e7bb73
RL		 4835 case -NFS4ERR_BADSESSION:
4836 case -NFS4ERR_BADSLOT:
4837 case -NFS4ERR_BAD_HIGH_SLOT:
4838 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4839 case -NFS4ERR_DEADSESSION:
0400a6b0 4840 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4841 goto out;
965b5d67
TM		 4842 case -ERESTARTSYS:
4843 /*
4844 * The show must go on: exit, but mark the
4845 * stateid as needing recovery.
4846 */
a1d0b5ee 4847 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4848 case -NFS4ERR_ADMIN_REVOKED:
4849 case -NFS4ERR_BAD_STATEID:
4850 case -NFS4ERR_OPENMODE:
0400a6b0 4851 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4852 err = 0;
4853 goto out;
168667c4
TM		 4854 case -EKEYEXPIRED:
4855 /*
4856 * User RPCSEC_GSS context has expired.
4857 * We cannot recover this stateid now, so
4858 * skip it and allow recovery thread to
4859 * proceed.
4860 */
4861 err = 0;
4862 goto out;
965b5d67
TM		 4863 case -ENOMEM:
4864 case -NFS4ERR_DENIED:
4865 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4866 err = 0;
4867 goto out;
d5122201
TM		 4868 case -NFS4ERR_DELAY:
4869 break;
4870 }
888e694c
TM		 4871 err = nfs4_handle_exception(server, err, &exception);
4872 } while (exception.retry);
4873out:
4874 return err;
4875}
6b3b5496 4876
cf470c3e
TM		 4877struct nfs_release_lockowner_data {
4878 struct nfs4_lock_state *lsp;
5ae67c4f 4879 struct nfs_server *server;
cf470c3e
TM		 4880 struct nfs_release_lockowner_args args;
4881};
4882
d3c7b7cc
TM		 4883static void nfs4_release_lockowner_release(void *calldata)
4884{
cf470c3e 4885 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4886 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4887 kfree(calldata);
4888}
4889
17280175 4890static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4891 .rpc_release = nfs4_release_lockowner_release,
4892};
4893
cf470c3e 4894int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4895{
4896 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4897 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4898 struct rpc_message msg = {
4899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4900 };
4901
4902 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4903 return -EINVAL;
4904 data = kmalloc(sizeof(*data), GFP_NOFS);
4905 if (!data)
4906 return -ENOMEM;
4907 data->lsp = lsp;
5ae67c4f 4908 data->server = server;
cf470c3e
TM		 4909 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4910 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4911 data->args.lock_owner.s_dev = server->s_dev;
4912 msg.rpc_argp = &data->args;
4913 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4914 return 0;
d3c7b7cc
TM		 4915}
4916
aa1870af
BF		 4917#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4918
64c2ce8b
AK		 4919static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4920 const void *buf, size_t buflen,
4921 int flags, int type)
6b3b5496 4922{
64c2ce8b
AK		 4923 if (strcmp(key, "") != 0)
4924 return -EINVAL;
4b580ee3 4925
64c2ce8b 4926 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4927}
4928
64c2ce8b
AK		 4929static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4930 void *buf, size_t buflen, int type)
6b3b5496 4931{
64c2ce8b
AK		 4932 if (strcmp(key, "") != 0)
4933 return -EINVAL;
aa1870af 4934
64c2ce8b 4935 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4936}
4937
64c2ce8b
AK		 4938static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4939 size_t list_len, const char *name,
4940 size_t name_len, int type)
6b3b5496 4941{
64c2ce8b 4942 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4943
096455a2
BF		 4944 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4945 return 0;
64c2ce8b
AK		 4946
4947 if (list && len <= list_len)
4948 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4949 return len;
6b3b5496
BF		 4950}
4951
533eb461
AA		 4952/*
4953 * nfs_fhget will use either the mounted_on_fileid or the fileid
4954 */
69aaaae1
TM		 4955static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4956{
533eb461
AA		 4957 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4958 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4959 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4960 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4961 return;
4962
4963 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4964 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4965 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4966 fattr->nlink = 2;
4967}
4968
f05d147f
BS		 4969static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4970 const struct qstr *name,
4971 struct nfs4_fs_locations *fs_locations,
4972 struct page *page)
683b57b4
TM		 4973{
4974 struct nfs_server *server = NFS_SERVER(dir);
4975 u32 bitmask[2] = {
361e624f 4976 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4977 };
4978 struct nfs4_fs_locations_arg args = {
4979 .dir_fh = NFS_FH(dir),
c228fd3a 4980 .name = name,
683b57b4
TM		 4981 .page = page,
4982 .bitmask = bitmask,
4983 };
22958463
BH		 4984 struct nfs4_fs_locations_res res = {
4985 .fs_locations = fs_locations,
4986 };
683b57b4
TM		 4987 struct rpc_message msg = {
4988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4989 .rpc_argp = &args,
22958463 4990 .rpc_resp = &res,
683b57b4
TM		 4991 };
4992 int status;
4993
3110ff80 4994 dprintk("%s: start\n", __func__);
533eb461
AA		 4995
4996 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4997 * is not supported */
4998 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4999 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5000 else
5001 bitmask[0] |= FATTR4_WORD0_FILEID;
5002
c228fd3a 5003 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5004 fs_locations->server = server;
830b8e33 5005 fs_locations->nlocations = 0;
f05d147f 5006 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5007 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5008 return status;
5009}
5010
f05d147f
BS		 5011int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5012 const struct qstr *name,
5013 struct nfs4_fs_locations *fs_locations,
5014 struct page *page)
db0a9593
BS		 5015{
5016 struct nfs4_exception exception = { };
5017 int err;
5018 do {
5019 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5020 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5021 &exception);
5022 } while (exception.retry);
5023 return err;
5024}
5025
5a5ea0d4
BS		 5026static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5027{
5028 int status;
5029 struct nfs4_secinfo_arg args = {
5030 .dir_fh = NFS_FH(dir),
5031 .name = name,
5032 };
5033 struct nfs4_secinfo_res res = {
5034 .flavors = flavors,
5035 };
5036 struct rpc_message msg = {
5037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5038 .rpc_argp = &args,
5039 .rpc_resp = &res,
5040 };
5041
5042 dprintk("NFS call secinfo %s\n", name->name);
5043 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5044 dprintk("NFS reply secinfo: %d\n", status);
5045 return status;
5046}
5047
72de53ec
BS		 5048int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5049 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5050{
5051 struct nfs4_exception exception = { };
5052 int err;
5053 do {
5054 err = nfs4_handle_exception(NFS_SERVER(dir),
5055 _nfs4_proc_secinfo(dir, name, flavors),
5056 &exception);
5057 } while (exception.retry);
5058 return err;
5059}
5060
557134a3 5061#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5062/*
5063 * Check the exchange flags returned by the server for invalid flags, having
5064 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5065 * DS flags set.
5066 */
5067static int nfs4_check_cl_exchange_flags(u32 flags)
5068{
5069 if (flags & ~EXCHGID4_FLAG_MASK_R)
5070 goto out_inval;
5071 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5072 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5073 goto out_inval;
5074 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5075 goto out_inval;
5076 return NFS_OK;
5077out_inval:
5078 return -NFS4ERR_INVAL;
5079}
5080
78fe0f41
WAA		 5081static bool
5082nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
5083{
5084 if (a->server_scope_sz == b->server_scope_sz &&
5085 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5086 return true;
5087
5088 return false;
5089}
5090
99fe60d0
BH		 5091/*
5092 * nfs4_proc_exchange_id()
5093 *
5094 * Since the clientid has expired, all compounds using sessions
5095 * associated with the stale clientid will be returning
5096 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5097 * be in some phase of session reset.
5098 */
4d643d1d 5099int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5100{
5101 nfs4_verifier verifier;
5102 struct nfs41_exchange_id_args args = {
cd93710e 5103 .verifier = &verifier,
99fe60d0 5104 .client = clp,
357f54d6 5105 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5106 };
5107 struct nfs41_exchange_id_res res = {
5108 .client = clp,
5109 };
5110 int status;
5111 struct rpc_message msg = {
5112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5113 .rpc_argp = &args,
5114 .rpc_resp = &res,
5115 .rpc_cred = cred,
5116 };
99fe60d0
BH		 5117
5118 dprintk("--> %s\n", __func__);
5119 BUG_ON(clp == NULL);
a7b72103 5120
cd93710e 5121 nfs4_construct_boot_verifier(clp, &verifier);
99fe60d0 5122
c7a360b0 5123 args.id_len = scnprintf(args.id, sizeof(args.id),
3617e503 5124 "%s/%s/%u",
c7a360b0 5125 clp->cl_ipaddr,
3617e503 5126 clp->cl_rpcclient->cl_nodename,
c7a360b0 5127 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5128
78fe0f41 5129 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
abe9a6d5
WAA		 5130 if (unlikely(!res.server_scope)) {
5131 status = -ENOMEM;
5132 goto out;
5133 }
78fe0f41 5134
7d2ed9ac
WAA		 5135 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5136 if (unlikely(!res.impl_id)) {
5137 status = -ENOMEM;
5138 goto out_server_scope;
5139 }
5140
1bd714f2 5141 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 5142 if (!status)
5143 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41 5144
7d2ed9ac
WAA		 5145 if (!status) {
5146 /* use the most recent implementation id */
5147 kfree(clp->impl_id);
5148 clp->impl_id = res.impl_id;
5149 } else
5150 kfree(res.impl_id);
5151
78fe0f41
WAA		 5152 if (!status) {
5153 if (clp->server_scope &&
5154 !nfs41_same_server_scope(clp->server_scope,
5155 res.server_scope)) {
5156 dprintk("%s: server_scope mismatch detected\n",
5157 __func__);
5158 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5159 kfree(clp->server_scope);
5160 clp->server_scope = NULL;
5161 }
5162
abe9a6d5 5163 if (!clp->server_scope) {
78fe0f41 5164 clp->server_scope = res.server_scope;
abe9a6d5
WAA		 5165 goto out;
5166 }
78fe0f41 5167 }
7d2ed9ac
WAA		 5168
5169out_server_scope:
abe9a6d5
WAA		 5170 kfree(res.server_scope);
5171out:
7d2ed9ac
WAA		 5172 if (clp->impl_id)
5173 dprintk("%s: Server Implementation ID: "
5174 "domain: %s, name: %s, date: %llu,%u\n",
5175 __func__, clp->impl_id->domain, clp->impl_id->name,
5176 clp->impl_id->date.seconds,
5177 clp->impl_id->date.nseconds);
99fe60d0
BH		 5178 dprintk("<-- %s status= %d\n", __func__, status);
5179 return status;
5180}
5181
2050f0cc
AA		 5182struct nfs4_get_lease_time_data {
5183 struct nfs4_get_lease_time_args *args;
5184 struct nfs4_get_lease_time_res *res;
5185 struct nfs_client *clp;
5186};
5187
5188static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5189 void *calldata)
5190{
5191 int ret;
5192 struct nfs4_get_lease_time_data *data =
5193 (struct nfs4_get_lease_time_data *)calldata;
5194
5195 dprintk("--> %s\n", __func__);
689cf5c1 5196 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5197 /* just setup sequence, do not trigger session recovery
5198 since we're invoked within one */
5199 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5200 &data->args->la_seq_args,
9d12b216 5201 &data->res->lr_seq_res, task);
2050f0cc
AA		 5202
5203 BUG_ON(ret == -EAGAIN);
5204 rpc_call_start(task);
5205 dprintk("<-- %s\n", __func__);
5206}
5207
5208/*
5209 * Called from nfs4_state_manager thread for session setup, so don't recover
5210 * from sequence operation or clientid errors.
5211 */
5212static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5213{
5214 struct nfs4_get_lease_time_data *data =
5215 (struct nfs4_get_lease_time_data *)calldata;
5216
5217 dprintk("--> %s\n", __func__);
14516c3a
TM		 5218 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5219 return;
2050f0cc
AA		 5220 switch (task->tk_status) {
5221 case -NFS4ERR_DELAY:
5222 case -NFS4ERR_GRACE:
5223 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5224 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5225 task->tk_status = 0;
a8a4ae3a
AA		 5226 /* fall through */
5227 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5228 rpc_restart_call_prepare(task);
2050f0cc
AA		 5229 return;
5230 }
2050f0cc
AA		 5231 dprintk("<-- %s\n", __func__);
5232}
5233
17280175 5234static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5235 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5236 .rpc_call_done = nfs4_get_lease_time_done,
5237};
5238
5239int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5240{
5241 struct rpc_task *task;
5242 struct nfs4_get_lease_time_args args;
5243 struct nfs4_get_lease_time_res res = {
5244 .lr_fsinfo = fsinfo,
5245 };
5246 struct nfs4_get_lease_time_data data = {
5247 .args = &args,
5248 .res = &res,
5249 .clp = clp,
5250 };
5251 struct rpc_message msg = {
5252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5253 .rpc_argp = &args,
5254 .rpc_resp = &res,
5255 };
5256 struct rpc_task_setup task_setup = {
5257 .rpc_client = clp->cl_rpcclient,
5258 .rpc_message = &msg,
5259 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5260 .callback_data = &data,
5261 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5262 };
5263 int status;
5264
9d12b216 5265 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5266 dprintk("--> %s\n", __func__);
5267 task = rpc_run_task(&task_setup);
5268
5269 if (IS_ERR(task))
5270 status = PTR_ERR(task);
5271 else {
5272 status = task->tk_status;
5273 rpc_put_task(task);
5274 }
5275 dprintk("<-- %s return %d\n", __func__, status);
5276
5277 return status;
5278}
5279
f86f36a6
TM		 5280static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5281{
5282 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5283}
5284
5285static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5286 struct nfs4_slot *new,
5287 u32 max_slots,
5288 u32 ivalue)
5289{
5290 struct nfs4_slot *old = NULL;
5291 u32 i;
5292
5293 spin_lock(&tbl->slot_tbl_lock);
5294 if (new) {
5295 old = tbl->slots;
5296 tbl->slots = new;
5297 tbl->max_slots = max_slots;
5298 }
5299 tbl->highest_used_slotid = -1; /* no slot is currently used */
5300 for (i = 0; i < tbl->max_slots; i++)
5301 tbl->slots[i].seq_nr = ivalue;
5302 spin_unlock(&tbl->slot_tbl_lock);
5303 kfree(old);
5304}
5305
b73dafa7 5306/*
f86f36a6 5307 * (re)Initialise a slot table
b73dafa7 5308 */
f86f36a6
TM		 5309static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5310 u32 ivalue)
ac72b7b3 5311{
104aeba4 5312 struct nfs4_slot *new = NULL;
f86f36a6 5313 int ret = -ENOMEM;
ac72b7b3 5314
104aeba4
AA		 5315 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5316 max_reqs, tbl->max_slots);
ac72b7b3 5317
104aeba4
AA		 5318 /* Does the newly negotiated max_reqs match the existing slot table? */
5319 if (max_reqs != tbl->max_slots) {
f86f36a6 5320 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5321 if (!new)
5322 goto out;
104aeba4 5323 }
f86f36a6
TM		 5324 ret = 0;
5325
5326 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5327 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5328 tbl, tbl->slots, tbl->max_slots);
5329out:
5330 dprintk("<-- %s: return %d\n", __func__, ret);
5331 return ret;
5332}
5333
f8625a6a
RL		 5334/* Destroy the slot table */
5335static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5336{
5337 if (session->fc_slot_table.slots != NULL) {
5338 kfree(session->fc_slot_table.slots);
5339 session->fc_slot_table.slots = NULL;
5340 }
5341 if (session->bc_slot_table.slots != NULL) {
5342 kfree(session->bc_slot_table.slots);
5343 session->bc_slot_table.slots = NULL;
5344 }
5345 return;
5346}
5347
050047ce 5348/*
aacd5537 5349 * Initialize or reset the forechannel and backchannel tables
050047ce 5350 */
aacd5537 5351static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5352{
f26468fb 5353 struct nfs4_slot_table *tbl;
aacd5537 5354 int status;
050047ce 5355
aacd5537
AA		 5356 dprintk("--> %s\n", __func__);
5357 /* Fore channel */
5358 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5359 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5360 if (status) /* -ENOMEM */
5361 return status;
aacd5537
AA		 5362 /* Back channel */
5363 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5364 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5365 if (status && tbl->slots == NULL)
5366 /* Fore and back channel share a connection so get
5367 * both slot tables or neither */
5368 nfs4_destroy_slot_tables(ses);
f8625a6a 5369 return status;
557134a3
AA		 5370}
5371
5372struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5373{
5374 struct nfs4_session *session;
5375 struct nfs4_slot_table *tbl;
5376
8535b2be 5377 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5378 if (!session)
5379 return NULL;
76db6d95 5380
557134a3 5381 tbl = &session->fc_slot_table;
45d43c29 5382 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5383 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5384 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5385 init_completion(&tbl->complete);
f8625a6a
RL		 5386
5387 tbl = &session->bc_slot_table;
45d43c29 5388 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5389 spin_lock_init(&tbl->slot_tbl_lock);
5390 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5391 init_completion(&tbl->complete);
f8625a6a 5392
1055d76d
TM		 5393 session->session_state = 1<<NFS4_SESSION_INITING;
5394
557134a3
AA		 5395 session->clp = clp;
5396 return session;
5397}
5398
5399void nfs4_destroy_session(struct nfs4_session *session)
5400{
2446ab60
TM		 5401 struct rpc_xprt *xprt;
5402
5a0ffe54 5403 nfs4_proc_destroy_session(session);
2446ab60
TM		 5404
5405 rcu_read_lock();
5406 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5407 rcu_read_unlock();
5a0ffe54 5408 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5409 __func__, xprt);
5410 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5411 nfs4_destroy_slot_tables(session);
557134a3
AA		 5412 kfree(session);
5413}
5414
fc931582
AA		 5415/*
5416 * Initialize the values to be used by the client in CREATE_SESSION
5417 * If nfs4_init_session set the fore channel request and response sizes,
5418 * use them.
5419 *
5420 * Set the back channel max_resp_sz_cached to zero to force the client to
5421 * always set csa_cachethis to FALSE because the current implementation
5422 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5423 */
5424static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5425{
5426 struct nfs4_session *session = args->client->cl_session;
5427 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5428 mxresp_sz = session->fc_attrs.max_resp_sz;
5429
5430 if (mxrqst_sz == 0)
5431 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5432 if (mxresp_sz == 0)
5433 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5434 /* Fore channel attributes */
fc931582
AA		 5435 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5436 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5437 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5438 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5439
5440 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5441 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5442 __func__,
5443 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5444 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5445
5446 /* Back channel attributes */
fc931582
AA		 5447 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5448 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5449 args->bc_attrs.max_resp_sz_cached = 0;
5450 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5451 args->bc_attrs.max_reqs = 1;
5452
5453 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5454 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5455 __func__,
5456 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5457 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5458 args->bc_attrs.max_reqs);
5459}
5460
43c2e885 5461static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5462{
43c2e885
BF		 5463 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5464 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5465
43c2e885
BF		 5466 if (rcvd->max_resp_sz > sent->max_resp_sz)
5467 return -EINVAL;
5468 /*
5469 * Our requested max_ops is the minimum we need; we're not
5470 * prepared to break up compounds into smaller pieces than that.
5471 * So, no point even trying to continue if the server won't
5472 * cooperate:
5473 */
5474 if (rcvd->max_ops < sent->max_ops)
5475 return -EINVAL;
5476 if (rcvd->max_reqs == 0)
5477 return -EINVAL;
b4b9a0c1
VG		 5478 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5479 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5480 return 0;
8d35301d
AA		 5481}
5482
43c2e885
BF		 5483static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5484{
5485 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5486 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5487
43c2e885
BF		 5488 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5489 return -EINVAL;
5490 if (rcvd->max_resp_sz < sent->max_resp_sz)
5491 return -EINVAL;
5492 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5493 return -EINVAL;
5494 /* These would render the backchannel useless: */
b4b9a0c1 5495 if (rcvd->max_ops != sent->max_ops)
43c2e885 5496 return -EINVAL;
b4b9a0c1 5497 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5498 return -EINVAL;
5499 return 0;
5500}
8d35301d 5501
8d35301d
AA		 5502static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5503 struct nfs4_session *session)
5504{
43c2e885 5505 int ret;
8d35301d 5506
43c2e885
BF		 5507 ret = nfs4_verify_fore_channel_attrs(args, session);
5508 if (ret)
5509 return ret;
5510 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5511}
5512
fc931582
AA		 5513static int _nfs4_proc_create_session(struct nfs_client *clp)
5514{
5515 struct nfs4_session *session = clp->cl_session;
5516 struct nfs41_create_session_args args = {
5517 .client = clp,
5518 .cb_program = NFS4_CALLBACK,
5519 };
5520 struct nfs41_create_session_res res = {
5521 .client = clp,
5522 };
5523 struct rpc_message msg = {
5524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5525 .rpc_argp = &args,
5526 .rpc_resp = &res,
5527 };
5528 int status;
5529
5530 nfs4_init_channel_attrs(&args);
0f91421e 5531 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5532
1bd714f2 5533 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5534
8d35301d
AA		 5535 if (!status)
5536 /* Verify the session's negotiated channel_attrs values */
5537 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5538 if (!status) {
5539 /* Increment the clientid slot sequence id */
5540 clp->cl_seqid++;
5541 }
5542
5543 return status;
5544}
5545
5546/*
5547 * Issues a CREATE_SESSION operation to the server.
5548 * It is the responsibility of the caller to verify the session is
5549 * expired before calling this routine.
5550 */
f26468fb 5551int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5552{
5553 int status;
5554 unsigned *ptr;
fc931582
AA		 5555 struct nfs4_session *session = clp->cl_session;
5556
5557 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5558
fd954ae1 5559 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5560 if (status)
5561 goto out;
5562
aacd5537
AA		 5563 /* Init or reset the session slot tables */
5564 status = nfs4_setup_session_slot_tables(session);
5565 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5566 if (status)
5567 goto out;
5568
5569 ptr = (unsigned *)&session->sess_id.data[0];
5570 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5571 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5572out:
5573 dprintk("<-- %s\n", __func__);
5574 return status;
5575}
5576
0f3e66c6
AA		 5577/*
5578 * Issue the over-the-wire RPC DESTROY_SESSION.
5579 * The caller must serialize access to this routine.
5580 */
5581int nfs4_proc_destroy_session(struct nfs4_session *session)
5582{
5583 int status = 0;
5584 struct rpc_message msg;
5585
5586 dprintk("--> nfs4_proc_destroy_session\n");
5587
5588 /* session is still being setup */
5589 if (session->clp->cl_cons_state != NFS_CS_READY)
5590 return status;
5591
5592 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5593 msg.rpc_argp = session;
5594 msg.rpc_resp = NULL;
5595 msg.rpc_cred = NULL;
1bd714f2 5596 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5597
5598 if (status)
5599 printk(KERN_WARNING
f9fd2d9c 5600 "NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5601 "Session has been destroyed regardless...\n", status);
5602
5603 dprintk("<-- nfs4_proc_destroy_session\n");
5604 return status;
5605}
5606
fccba804
TM		 5607int nfs4_init_session(struct nfs_server *server)
5608{
5609 struct nfs_client *clp = server->nfs_client;
2449ea2e 5610 struct nfs4_session *session;
68bf05ef 5611 unsigned int rsize, wsize;
fccba804
TM		 5612 int ret;
5613
5614 if (!nfs4_has_session(clp))
5615 return 0;
5616
1055d76d
TM		 5617 session = clp->cl_session;
5618 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5619 return 0;
5620
68bf05ef
AA		 5621 rsize = server->rsize;
5622 if (rsize == 0)
5623 rsize = NFS_MAX_FILE_IO_SIZE;
5624 wsize = server->wsize;
5625 if (wsize == 0)
5626 wsize = NFS_MAX_FILE_IO_SIZE;
5627
68bf05ef
AA		 5628 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5629 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5630
fccba804
TM		 5631 ret = nfs4_recover_expired_lease(server);
5632 if (!ret)
5633 ret = nfs4_check_client_ready(clp);
5634 return ret;
5635}
5636
d83217c1
AA		 5637int nfs4_init_ds_session(struct nfs_client *clp)
5638{
5639 struct nfs4_session *session = clp->cl_session;
5640 int ret;
5641
5642 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5643 return 0;
5644
5645 ret = nfs4_client_recover_expired_lease(clp);
5646 if (!ret)
5647 /* Test for the DS role */
5648 if (!is_ds_client(clp))
5649 ret = -ENODEV;
5650 if (!ret)
5651 ret = nfs4_check_client_ready(clp);
5652 return ret;
5653
5654}
5655EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5656
5657
fc01cea9
AA		 5658/*
5659 * Renew the cl_session lease.
5660 */
d5f8d3fe
TM		 5661struct nfs4_sequence_data {
5662 struct nfs_client *clp;
5663 struct nfs4_sequence_args args;
5664 struct nfs4_sequence_res res;
5665};
5666
dc96aef9
AB		 5667static void nfs41_sequence_release(void *data)
5668{
d5f8d3fe
TM		 5669 struct nfs4_sequence_data *calldata = data;
5670 struct nfs_client *clp = calldata->clp;
dc96aef9 5671
7135840f
AB		 5672 if (atomic_read(&clp->cl_count) > 1)
5673 nfs4_schedule_state_renewal(clp);
5674 nfs_put_client(clp);
d5f8d3fe 5675 kfree(calldata);
dc96aef9
AB		 5676}
5677
aa5190d0
TM		 5678static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5679{
5680 switch(task->tk_status) {
5681 case -NFS4ERR_DELAY:
aa5190d0
TM		 5682 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5683 return -EAGAIN;
5684 default:
0400a6b0 5685 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5686 }
5687 return 0;
5688}
5689
dc96aef9 5690static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5691{
d5f8d3fe
TM		 5692 struct nfs4_sequence_data *calldata = data;
5693 struct nfs_client *clp = calldata->clp;
fc01cea9 5694
14516c3a
TM		 5695 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5696 return;
fc01cea9
AA		 5697
5698 if (task->tk_status < 0) {
5699 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5700 if (atomic_read(&clp->cl_count) == 1)
5701 goto out;
fc01cea9 5702
aa5190d0
TM		 5703 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5704 rpc_restart_call_prepare(task);
fc01cea9
AA		 5705 return;
5706 }
5707 }
fc01cea9 5708 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5709out:
fc01cea9
AA		 5710 dprintk("<-- %s\n", __func__);
5711}
5712
5713static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5714{
d5f8d3fe
TM		 5715 struct nfs4_sequence_data *calldata = data;
5716 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5717 struct nfs4_sequence_args *args;
5718 struct nfs4_sequence_res *res;
5719
fc01cea9
AA		 5720 args = task->tk_msg.rpc_argp;
5721 res = task->tk_msg.rpc_resp;
5722
9d12b216 5723 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5724 return;
5725 rpc_call_start(task);
5726}
5727
5728static const struct rpc_call_ops nfs41_sequence_ops = {
5729 .rpc_call_done = nfs41_sequence_call_done,
5730 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5731 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5732};
5733
71ac6da9 5734static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5735{
d5f8d3fe 5736 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5737 struct rpc_message msg = {
5738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5739 .rpc_cred = cred,
5740 };
71ac6da9
TM		 5741 struct rpc_task_setup task_setup_data = {
5742 .rpc_client = clp->cl_rpcclient,
5743 .rpc_message = &msg,
5744 .callback_ops = &nfs41_sequence_ops,
5745 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5746 };
fc01cea9 5747
7135840f 5748 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5749 return ERR_PTR(-EIO);
dfb4f309 5750 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5751 if (calldata == NULL) {
7135840f 5752 nfs_put_client(clp);
71ac6da9 5753 return ERR_PTR(-ENOMEM);
fc01cea9 5754 }
9d12b216 5755 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5756 msg.rpc_argp = &calldata->args;
5757 msg.rpc_resp = &calldata->res;
5758 calldata->clp = clp;
71ac6da9 5759 task_setup_data.callback_data = calldata;
fc01cea9 5760
71ac6da9
TM		 5761 return rpc_run_task(&task_setup_data);
5762}
5763
2f60ea6b 5764static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5765{
5766 struct rpc_task *task;
5767 int ret = 0;
5768
2f60ea6b
TM		 5769 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5770 return 0;
71ac6da9
TM		 5771 task = _nfs41_proc_sequence(clp, cred);
5772 if (IS_ERR(task))
5773 ret = PTR_ERR(task);
5774 else
bf294b41 5775 rpc_put_task_async(task);
71ac6da9
TM		 5776 dprintk("<-- %s status=%d\n", __func__, ret);
5777 return ret;
5778}
5779
5780static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5781{
5782 struct rpc_task *task;
5783 int ret;
5784
5785 task = _nfs41_proc_sequence(clp, cred);
5786 if (IS_ERR(task)) {
5787 ret = PTR_ERR(task);
5788 goto out;
5789 }
5790 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5791 if (!ret) {
5792 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5793
5794 if (task->tk_status == 0)
5795 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5796 ret = task->tk_status;
b4410c2f 5797 }
71ac6da9
TM		 5798 rpc_put_task(task);
5799out:
5800 dprintk("<-- %s status=%d\n", __func__, ret);
5801 return ret;
fc01cea9
AA		 5802}
5803
fce5c838
RL		 5804struct nfs4_reclaim_complete_data {
5805 struct nfs_client *clp;
5806 struct nfs41_reclaim_complete_args arg;
5807 struct nfs41_reclaim_complete_res res;
5808};
5809
5810static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5811{
5812 struct nfs4_reclaim_complete_data *calldata = data;
5813
b257957e 5814 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5815 if (nfs41_setup_sequence(calldata->clp->cl_session,
5816 &calldata->arg.seq_args,
9d12b216 5817 &calldata->res.seq_res, task))
fce5c838
RL		 5818 return;
5819
5820 rpc_call_start(task);
5821}
5822
aa5190d0
TM		 5823static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5824{
5825 switch(task->tk_status) {
5826 case 0:
5827 case -NFS4ERR_COMPLETE_ALREADY:
5828 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5829 break;
5830 case -NFS4ERR_DELAY:
aa5190d0 5831 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5832 /* fall through */
5833 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5834 return -EAGAIN;
5835 default:
0400a6b0 5836 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5837 }
5838 return 0;
5839}
5840
fce5c838
RL		 5841static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5842{
5843 struct nfs4_reclaim_complete_data *calldata = data;
5844 struct nfs_client *clp = calldata->clp;
5845 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5846
5847 dprintk("--> %s\n", __func__);
14516c3a
TM		 5848 if (!nfs41_sequence_done(task, res))
5849 return;
fce5c838 5850
aa5190d0
TM		 5851 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5852 rpc_restart_call_prepare(task);
5853 return;
5854 }
fce5c838
RL		 5855 dprintk("<-- %s\n", __func__);
5856}
5857
5858static void nfs4_free_reclaim_complete_data(void *data)
5859{
5860 struct nfs4_reclaim_complete_data *calldata = data;
5861
5862 kfree(calldata);
5863}
5864
5865static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5866 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5867 .rpc_call_done = nfs4_reclaim_complete_done,
5868 .rpc_release = nfs4_free_reclaim_complete_data,
5869};
5870
5871/*
5872 * Issue a global reclaim complete.
5873 */
5874static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5875{
5876 struct nfs4_reclaim_complete_data *calldata;
5877 struct rpc_task *task;
5878 struct rpc_message msg = {
5879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5880 };
5881 struct rpc_task_setup task_setup_data = {
5882 .rpc_client = clp->cl_rpcclient,
5883 .rpc_message = &msg,
5884 .callback_ops = &nfs4_reclaim_complete_call_ops,
5885 .flags = RPC_TASK_ASYNC,
5886 };
5887 int status = -ENOMEM;
5888
5889 dprintk("--> %s\n", __func__);
8535b2be 5890 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5891 if (calldata == NULL)
5892 goto out;
5893 calldata->clp = clp;
5894 calldata->arg.one_fs = 0;
fce5c838 5895
9d12b216 5896 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5897 msg.rpc_argp = &calldata->arg;
5898 msg.rpc_resp = &calldata->res;
5899 task_setup_data.callback_data = calldata;
5900 task = rpc_run_task(&task_setup_data);
acf82b85 5901 if (IS_ERR(task)) {
fce5c838 5902 status = PTR_ERR(task);
acf82b85
DC		 5903 goto out;
5904 }
c34c32ea
AA		 5905 status = nfs4_wait_for_completion_rpc_task(task);
5906 if (status == 0)
5907 status = task->tk_status;
fce5c838 5908 rpc_put_task(task);
acf82b85 5909 return 0;
fce5c838
RL		 5910out:
5911 dprintk("<-- %s status=%d\n", __func__, status);
5912 return status;
5913}
b1f69b75
AA		 5914
5915static void
5916nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5917{
5918 struct nfs4_layoutget *lgp = calldata;
c31663d4 5919 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5920
5921 dprintk("--> %s\n", __func__);
c31663d4
FI		 5922 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5923 * right now covering the LAYOUTGET we are about to send.
5924 * However, that is not so catastrophic, and there seems
5925 * to be no way to prevent it completely.
5926 */
b1f69b75 5927 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 5928 &lgp->res.seq_res, task))
b1f69b75 5929 return;
cf7d63f1
FI		 5930 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5931 NFS_I(lgp->args.inode)->layout,
5932 lgp->args.ctx->state)) {
5933 rpc_exit(task, NFS4_OK);
5934 return;
5935 }
b1f69b75
AA		 5936 rpc_call_start(task);
5937}
5938
5939static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5940{
5941 struct nfs4_layoutget *lgp = calldata;
5942 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5943
5944 dprintk("--> %s\n", __func__);
5945
5946 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5947 return;
5948
5949 switch (task->tk_status) {
5950 case 0:
5951 break;
5952 case -NFS4ERR_LAYOUTTRYLATER:
5953 case -NFS4ERR_RECALLCONFLICT:
5954 task->tk_status = -NFS4ERR_DELAY;
5955 /* Fall through */
5956 default:
5957 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5958 rpc_restart_call_prepare(task);
5959 return;
5960 }
5961 }
b1f69b75
AA		 5962 dprintk("<-- %s\n", __func__);
5963}
5964
5965static void nfs4_layoutget_release(void *calldata)
5966{
5967 struct nfs4_layoutget *lgp = calldata;
5968
5969 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5970 put_nfs_open_context(lgp->args.ctx);
5971 kfree(calldata);
5972 dprintk("<-- %s\n", __func__);
5973}
5974
5975static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5976 .rpc_call_prepare = nfs4_layoutget_prepare,
5977 .rpc_call_done = nfs4_layoutget_done,
5978 .rpc_release = nfs4_layoutget_release,
5979};
5980
5981int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5982{
5983 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5984 struct rpc_task *task;
5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5987 .rpc_argp = &lgp->args,
5988 .rpc_resp = &lgp->res,
5989 };
5990 struct rpc_task_setup task_setup_data = {
5991 .rpc_client = server->client,
5992 .rpc_message = &msg,
5993 .callback_ops = &nfs4_layoutget_call_ops,
5994 .callback_data = lgp,
5995 .flags = RPC_TASK_ASYNC,
5996 };
5997 int status = 0;
5998
5999 dprintk("--> %s\n", __func__);
6000
35124a09 6001 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6002 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6003 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6004 task = rpc_run_task(&task_setup_data);
6005 if (IS_ERR(task))
6006 return PTR_ERR(task);
6007 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6008 if (status == 0)
6009 status = task->tk_status;
6010 if (status == 0)
6011 status = pnfs_layout_process(lgp);
b1f69b75
AA		 6012 rpc_put_task(task);
6013 dprintk("<-- %s status=%d\n", __func__, status);
6014 return status;
6015}
6016
cbe82603
BH		 6017static void
6018nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6019{
6020 struct nfs4_layoutreturn *lrp = calldata;
6021
6022 dprintk("--> %s\n", __func__);
6023 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6024 &lrp->res.seq_res, task))
cbe82603
BH		 6025 return;
6026 rpc_call_start(task);
6027}
6028
6029static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6030{
6031 struct nfs4_layoutreturn *lrp = calldata;
6032 struct nfs_server *server;
a56aaa02 6033 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6034
6035 dprintk("--> %s\n", __func__);
6036
6037 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6038 return;
6039
6040 server = NFS_SERVER(lrp->args.inode);
6041 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6042 rpc_restart_call_prepare(task);
cbe82603
BH		 6043 return;
6044 }
a2e1d4f2 6045 spin_lock(&lo->plh_inode->i_lock);
cbe82603 6046 if (task->tk_status == 0) {
cbe82603 6047 if (lrp->res.lrs_present) {
cbe82603 6048 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 6049 } else
6050 BUG_ON(!list_empty(&lo->plh_segs));
6051 }
a2e1d4f2
FI		 6052 lo->plh_block_lgets--;
6053 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6054 dprintk("<-- %s\n", __func__);
6055}
6056
6057static void nfs4_layoutreturn_release(void *calldata)
6058{
6059 struct nfs4_layoutreturn *lrp = calldata;
6060
6061 dprintk("--> %s\n", __func__);
a56aaa02 6062 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6063 kfree(calldata);
6064 dprintk("<-- %s\n", __func__);
6065}
6066
6067static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6068 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6069 .rpc_call_done = nfs4_layoutreturn_done,
6070 .rpc_release = nfs4_layoutreturn_release,
6071};
6072
6073int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6074{
6075 struct rpc_task *task;
6076 struct rpc_message msg = {
6077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6078 .rpc_argp = &lrp->args,
6079 .rpc_resp = &lrp->res,
6080 };
6081 struct rpc_task_setup task_setup_data = {
6082 .rpc_client = lrp->clp->cl_rpcclient,
6083 .rpc_message = &msg,
6084 .callback_ops = &nfs4_layoutreturn_call_ops,
6085 .callback_data = lrp,
6086 };
6087 int status;
6088
6089 dprintk("--> %s\n", __func__);
9d12b216 6090 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6091 task = rpc_run_task(&task_setup_data);
6092 if (IS_ERR(task))
6093 return PTR_ERR(task);
6094 status = task->tk_status;
6095 dprintk("<-- %s status=%d\n", __func__, status);
6096 rpc_put_task(task);
6097 return status;
6098}
6099
7f11d8d3
AA		 6100/*
6101 * Retrieve the list of Data Server devices from the MDS.
6102 */
6103static int _nfs4_getdevicelist(struct nfs_server *server,
6104 const struct nfs_fh *fh,
6105 struct pnfs_devicelist *devlist)
6106{
6107 struct nfs4_getdevicelist_args args = {
6108 .fh = fh,
6109 .layoutclass = server->pnfs_curr_ld->id,
6110 };
6111 struct nfs4_getdevicelist_res res = {
6112 .devlist = devlist,
6113 };
6114 struct rpc_message msg = {
6115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6116 .rpc_argp = &args,
6117 .rpc_resp = &res,
6118 };
6119 int status;
6120
6121 dprintk("--> %s\n", __func__);
6122 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6123 &res.seq_res, 0);
6124 dprintk("<-- %s status=%d\n", __func__, status);
6125 return status;
6126}
6127
6128int nfs4_proc_getdevicelist(struct nfs_server *server,
6129 const struct nfs_fh *fh,
6130 struct pnfs_devicelist *devlist)
6131{
6132 struct nfs4_exception exception = { };
6133 int err;
6134
6135 do {
6136 err = nfs4_handle_exception(server,
6137 _nfs4_getdevicelist(server, fh, devlist),
6138 &exception);
6139 } while (exception.retry);
6140
6141 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6142 err, devlist->num_devs);
6143
6144 return err;
6145}
6146EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6147
b1f69b75
AA		 6148static int
6149_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6150{
6151 struct nfs4_getdeviceinfo_args args = {
6152 .pdev = pdev,
6153 };
6154 struct nfs4_getdeviceinfo_res res = {
6155 .pdev = pdev,
6156 };
6157 struct rpc_message msg = {
6158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6159 .rpc_argp = &args,
6160 .rpc_resp = &res,
6161 };
6162 int status;
6163
6164 dprintk("--> %s\n", __func__);
7c513058 6165 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6166 dprintk("<-- %s status=%d\n", __func__, status);
6167
6168 return status;
6169}
6170
6171int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6172{
6173 struct nfs4_exception exception = { };
6174 int err;
6175
6176 do {
6177 err = nfs4_handle_exception(server,
6178 _nfs4_proc_getdeviceinfo(server, pdev),
6179 &exception);
6180 } while (exception.retry);
6181 return err;
6182}
6183EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6184
863a3c6c
AA		 6185static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6186{
6187 struct nfs4_layoutcommit_data *data = calldata;
6188 struct nfs_server *server = NFS_SERVER(data->args.inode);
6189
6190 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6191 &data->res.seq_res, task))
863a3c6c
AA		 6192 return;
6193 rpc_call_start(task);
6194}
6195
6196static void
6197nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6198{
6199 struct nfs4_layoutcommit_data *data = calldata;
6200 struct nfs_server *server = NFS_SERVER(data->args.inode);
6201
6202 if (!nfs4_sequence_done(task, &data->res.seq_res))
6203 return;
6204
6205 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6206 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6207 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6208 case -NFS4ERR_BADLAYOUT: /* no layout */
6209 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6210 task->tk_status = 0;
e59d27e0
TM		 6211 break;
6212 case 0:
863a3c6c
AA		 6213 nfs_post_op_update_inode_force_wcc(data->args.inode,
6214 data->res.fattr);
e59d27e0
TM		 6215 break;
6216 default:
6217 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6218 rpc_restart_call_prepare(task);
6219 return;
6220 }
6221 }
863a3c6c
AA		 6222}
6223
6224static void nfs4_layoutcommit_release(void *calldata)
6225{
6226 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6227 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6228 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6229
db29c089 6230 pnfs_cleanup_layoutcommit(data);
863a3c6c 6231 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6232 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6233 list_del_init(&lseg->pls_lc_list);
6234 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6235 &lseg->pls_flags))
6236 put_lseg(lseg);
6237 }
92407e75
PT		 6238
6239 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6240 smp_mb__after_clear_bit();
6241 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6242
863a3c6c
AA		 6243 put_rpccred(data->cred);
6244 kfree(data);
6245}
6246
6247static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6248 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6249 .rpc_call_done = nfs4_layoutcommit_done,
6250 .rpc_release = nfs4_layoutcommit_release,
6251};
6252
6253int
ef311537 6254nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6255{
6256 struct rpc_message msg = {
6257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6258 .rpc_argp = &data->args,
6259 .rpc_resp = &data->res,
6260 .rpc_cred = data->cred,
6261 };
6262 struct rpc_task_setup task_setup_data = {
6263 .task = &data->task,
6264 .rpc_client = NFS_CLIENT(data->args.inode),
6265 .rpc_message = &msg,
6266 .callback_ops = &nfs4_layoutcommit_ops,
6267 .callback_data = data,
6268 .flags = RPC_TASK_ASYNC,
6269 };
6270 struct rpc_task *task;
6271 int status = 0;
6272
6273 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6274 "lbw: %llu inode %lu\n",
6275 data->task.tk_pid, sync,
6276 data->args.lastbytewritten,
6277 data->args.inode->i_ino);
6278
9d12b216 6279 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6280 task = rpc_run_task(&task_setup_data);
6281 if (IS_ERR(task))
6282 return PTR_ERR(task);
ef311537 6283 if (sync == false)
863a3c6c
AA		 6284 goto out;
6285 status = nfs4_wait_for_completion_rpc_task(task);
6286 if (status != 0)
6287 goto out;
6288 status = task->tk_status;
6289out:
6290 dprintk("%s: status %d\n", __func__, status);
6291 rpc_put_task(task);
6292 return status;
6293}
fca78d6d
BS		 6294
6295static int
6296_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6297 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6298{
6299 struct nfs41_secinfo_no_name_args args = {
6300 .style = SECINFO_STYLE_CURRENT_FH,
6301 };
6302 struct nfs4_secinfo_res res = {
6303 .flavors = flavors,
6304 };
6305 struct rpc_message msg = {
6306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6307 .rpc_argp = &args,
6308 .rpc_resp = &res,
6309 };
6310 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6311}
6312
6313static int
6314nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6315 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6316{
6317 struct nfs4_exception exception = { };
6318 int err;
6319 do {
6320 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6321 switch (err) {
6322 case 0:
6323 case -NFS4ERR_WRONGSEC:
6324 case -NFS4ERR_NOTSUPP:
05e9cfb4 6325 goto out;
fca78d6d
BS		 6326 default:
6327 err = nfs4_handle_exception(server, err, &exception);
6328 }
6329 } while (exception.retry);
05e9cfb4 6330out:
fca78d6d
BS		 6331 return err;
6332}
6333
6334static int
6335nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6336 struct nfs_fsinfo *info)
6337{
6338 int err;
6339 struct page *page;
6340 rpc_authflavor_t flavor;
6341 struct nfs4_secinfo_flavors *flavors;
6342
6343 page = alloc_page(GFP_KERNEL);
6344 if (!page) {
6345 err = -ENOMEM;
6346 goto out;
6347 }
6348
6349 flavors = page_address(page);
6350 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6351
6352 /*
6353 * Fall back on "guess and check" method if
6354 * the server doesn't support SECINFO_NO_NAME
6355 */
6356 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6357 err = nfs4_find_root_sec(server, fhandle, info);
6358 goto out_freepage;
6359 }
6360 if (err)
6361 goto out_freepage;
6362
6363 flavor = nfs_find_best_sec(flavors);
6364 if (err == 0)
6365 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6366
6367out_freepage:
6368 put_page(page);
6369 if (err == -EACCES)
6370 return -EPERM;
6371out:
6372 return err;
6373}
1cab0652
BS		 6374
6375static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6376{
6377 int status;
6378 struct nfs41_test_stateid_args args = {
1cab0652 6379 .stateid = stateid,
7d974794
BS		 6380 };
6381 struct nfs41_test_stateid_res res;
6382 struct rpc_message msg = {
6383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6384 .rpc_argp = &args,
6385 .rpc_resp = &res,
6386 };
1cab0652 6387
9d12b216 6388 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6389 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6390
6391 if (status == NFS_OK)
6392 return res.status;
7d974794
BS		 6393 return status;
6394}
6395
1cab0652 6396static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6397{
6398 struct nfs4_exception exception = { };
6399 int err;
6400 do {
6401 err = nfs4_handle_exception(server,
1cab0652 6402 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6403 &exception);
6404 } while (exception.retry);
6405 return err;
6406}
9aeda35f 6407
1cab0652 6408static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6409{
9aeda35f 6410 struct nfs41_free_stateid_args args = {
1cab0652 6411 .stateid = stateid,
9aeda35f
BS		 6412 };
6413 struct nfs41_free_stateid_res res;
6414 struct rpc_message msg = {
6415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6416 .rpc_argp = &args,
6417 .rpc_resp = &res,
6418 };
6419
9d12b216
TM		 6420 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6421 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6422}
6423
1cab0652 6424static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6425{
6426 struct nfs4_exception exception = { };
6427 int err;
6428 do {
6429 err = nfs4_handle_exception(server,
1cab0652 6430 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6431 &exception);
6432 } while (exception.retry);
6433 return err;
6434}
36281caa
TM		 6435
6436static bool nfs41_match_stateid(const nfs4_stateid *s1,
6437 const nfs4_stateid *s2)
6438{
2d2f24ad 6439 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6440 return false;
6441
2d2f24ad 6442 if (s1->seqid == s2->seqid)
36281caa 6443 return true;
2d2f24ad 6444 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6445 return true;
6446
6447 return false;
6448}
6449
557134a3
AA		 6450#endif /* CONFIG_NFS_V4_1 */
6451
36281caa
TM		 6452static bool nfs4_match_stateid(const nfs4_stateid *s1,
6453 const nfs4_stateid *s2)
6454{
f597c537 6455 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6456}
6457
6458
17280175 6459static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6460 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6461 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6462 .recover_open = nfs4_open_reclaim,
6463 .recover_lock = nfs4_lock_reclaim,
591d71cb 6464 .establish_clid = nfs4_init_clientid,
90a16617 6465 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6466};
6467
591d71cb 6468#if defined(CONFIG_NFS_V4_1)
17280175 6469static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6470 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6471 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6472 .recover_open = nfs4_open_reclaim,
6473 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6474 .establish_clid = nfs41_init_clientid,
b4b82607 6475 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6476 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6477};
6478#endif /* CONFIG_NFS_V4_1 */
6479
17280175 6480static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6481 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6482 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6483 .recover_open = nfs4_open_expired,
6484 .recover_lock = nfs4_lock_expired,
6485 .establish_clid = nfs4_init_clientid,
90a16617 6486 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6487};
6488
6489#if defined(CONFIG_NFS_V4_1)
17280175 6490static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6491 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6492 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6493 .recover_open = nfs41_open_expired,
6494 .recover_lock = nfs41_lock_expired,
4d643d1d 6495 .establish_clid = nfs41_init_clientid,
b4b82607 6496 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6497};
591d71cb 6498#endif /* CONFIG_NFS_V4_1 */
1da177e4 6499
17280175 6500static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6501 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6502 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6503 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6504};
6505
6506#if defined(CONFIG_NFS_V4_1)
17280175 6507static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6508 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6509 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6510 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6511};
6512#endif
6513
97dc1359
TM		 6514static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6515 .minor_version = 0,
6516 .call_sync = _nfs4_call_sync,
36281caa 6517 .match_stateid = nfs4_match_stateid,
fca78d6d 6518 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6519 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6520 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6521 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6522};
6523
6524#if defined(CONFIG_NFS_V4_1)
6525static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6526 .minor_version = 1,
6527 .call_sync = _nfs4_call_sync_session,
36281caa 6528 .match_stateid = nfs41_match_stateid,
fca78d6d 6529 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6530 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6531 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6532 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6533};
6534#endif
6535
97dc1359
TM		 6536const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6537 [0] = &nfs_v4_0_minor_ops,
6538#if defined(CONFIG_NFS_V4_1)
6539 [1] = &nfs_v4_1_minor_ops,
6540#endif
6541};
6542
92e1d5be 6543static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6544 .permission = nfs_permission,
6545 .getattr = nfs_getattr,
6546 .setattr = nfs_setattr,
64c2ce8b
AK		 6547 .getxattr = generic_getxattr,
6548 .setxattr = generic_setxattr,
6549 .listxattr = generic_listxattr,
6550 .removexattr = generic_removexattr,
6b3b5496
BF		 6551};
6552
509de811 6553const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6554 .version = 4, /* protocol version */
6555 .dentry_ops = &nfs4_dentry_operations,
6556 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6557 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6558 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6559 .getroot = nfs4_proc_get_root,
6560 .getattr = nfs4_proc_getattr,
6561 .setattr = nfs4_proc_setattr,
6562 .lookup = nfs4_proc_lookup,
6563 .access = nfs4_proc_access,
6564 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6565 .create = nfs4_proc_create,
6566 .remove = nfs4_proc_remove,
6567 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6568 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6569 .unlink_done = nfs4_proc_unlink_done,
6570 .rename = nfs4_proc_rename,
d3d4152a 6571 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6572 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6573 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6574 .link = nfs4_proc_link,
6575 .symlink = nfs4_proc_symlink,
6576 .mkdir = nfs4_proc_mkdir,
6577 .rmdir = nfs4_proc_remove,
6578 .readdir = nfs4_proc_readdir,
6579 .mknod = nfs4_proc_mknod,
6580 .statfs = nfs4_proc_statfs,
6581 .fsinfo = nfs4_proc_fsinfo,
6582 .pathconf = nfs4_proc_pathconf,
e9326dca 6583 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6584 .decode_dirent = nfs4_decode_dirent,
6585 .read_setup = nfs4_proc_read_setup,
ea7c3303 6586 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6587 .read_done = nfs4_read_done,
1da177e4 6588 .write_setup = nfs4_proc_write_setup,
c6cb80d0 6589 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6590 .write_done = nfs4_write_done,
1da177e4 6591 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6592 .commit_done = nfs4_commit_done,
1da177e4 6593 .lock = nfs4_proc_lock,
e50a1c2e 6594 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6595 .close_context = nfs4_close_context,
2b484297 6596 .open_context = nfs4_atomic_open,
45a52a02 6597 .init_client = nfs4_init_client,
5a5ea0d4 6598 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6599};
6600
64c2ce8b
AK		 6601static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6602 .prefix = XATTR_NAME_NFSV4_ACL,
6603 .list = nfs4_xattr_list_nfs4_acl,
6604 .get = nfs4_xattr_get_nfs4_acl,
6605 .set = nfs4_xattr_set_nfs4_acl,
6606};
6607
6608const struct xattr_handler *nfs4_xattr_handlers[] = {
6609 &nfs4_xattr_nfs4_acl_handler,
6610 NULL
6611};
6612
ef159e91
TM		 6613module_param(max_session_slots, ushort, 0644);
6614MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6615 "requests the client will negotiate");
6616
1da177e4
LT		 6617/*
6618 * Local variables:
6619 * c-basic-offset: 8
6620 * End:
6621 */
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