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NFS: Remove nfs4_setup_sequence from generic unlink code
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4 45#include <linux/sunrpc/clnt.h>
8f70e95f 46#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
6926afd1 55#include <linux/nfs_idmap.h>
5a0ffe54 56#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 57#include <linux/xattr.h>
c7a360b0 58#include <linux/utsname.h>
d310310c 59#include <linux/freezer.h>
1da177e4 60
4ce79717 61#include "nfs4_fs.h"
1da177e4 62#include "delegation.h"
101070ca 63#include "internal.h"
006ea73e 64#include "iostat.h"
fc931582 65#include "callback.h"
b1f69b75 66#include "pnfs.h"
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 */
0dbb4c67 199 start = p = kmap_atomic(*readdir->pages, KM_USER0);
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;
227 kunmap_atomic(start, KM_USER0);
228}
229
65de872e
TM		 230static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231{
232 int res;
233
234 might_sleep();
235
e005e804 236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 237 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 238 return res;
239}
240
241static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
242{
243 int res = 0;
244
245 might_sleep();
246
247 if (*timeout <= 0)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 251 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 252 if (fatal_signal_pending(current))
253 res = -ERESTARTSYS;
254 *timeout <<= 1;
255 return res;
256}
257
258/* This is the error handling routine for processes that are allowed
259 * to sleep.
260 */
b064eca2 261static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 262{
263 struct nfs_client *clp = server->nfs_client;
9e33bed5 264 struct nfs4_state *state = exception->state;
3114ea7a 265 struct inode *inode = exception->inode;
65de872e
TM		 266 int ret = errorcode;
267
268 exception->retry = 0;
269 switch(errorcode) {
270 case 0:
271 return 0;
3114ea7a
TM		 272 case -NFS4ERR_OPENMODE:
273 if (nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
276 return 0;
277 }
278 if (state == NULL)
279 break;
280 nfs4_schedule_stateid_recovery(server, state);
281 goto wait_on_recovery;
a1d0b5ee 282 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 283 case -NFS4ERR_ADMIN_REVOKED:
284 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 285 if (state != NULL)
286 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 287 if (state == NULL)
288 break;
0400a6b0
TM		 289 nfs4_schedule_stateid_recovery(server, state);
290 goto wait_on_recovery;
0ced63d1
TM		 291 case -NFS4ERR_EXPIRED:
292 if (state != NULL)
293 nfs4_schedule_stateid_recovery(server, state);
65de872e 294 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 295 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 296 nfs4_schedule_lease_recovery(clp);
297 goto wait_on_recovery;
03391693 298#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 299 case -NFS4ERR_BADSESSION:
300 case -NFS4ERR_BADSLOT:
301 case -NFS4ERR_BAD_HIGH_SLOT:
302 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
303 case -NFS4ERR_DEADSESSION:
304 case -NFS4ERR_SEQ_FALSE_RETRY:
305 case -NFS4ERR_SEQ_MISORDERED:
306 dprintk("%s ERROR: %d Reset session\n", __func__,
307 errorcode);
0400a6b0 308 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 309 exception->retry = 1;
b9179237 310 break;
03391693 311#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 312 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 313 if (exception->timeout > HZ) {
314 /* We have retried a decent amount, time to
315 * fail
316 */
317 ret = -EBUSY;
318 break;
319 }
65de872e
TM		 320 case -NFS4ERR_GRACE:
321 case -NFS4ERR_DELAY:
2c643488 322 case -EKEYEXPIRED:
65de872e
TM		 323 ret = nfs4_delay(server->client, &exception->timeout);
324 if (ret != 0)
325 break;
a8a4ae3a 326 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 327 case -NFS4ERR_OLD_STATEID:
328 exception->retry = 1;
b064eca2
TM		 329 break;
330 case -NFS4ERR_BADOWNER:
331 /* The following works around a Linux server bug! */
332 case -NFS4ERR_BADNAME:
333 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
334 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
335 exception->retry = 1;
336 printk(KERN_WARNING "NFS: v4 server %s "
337 "does not accept raw "
338 "uid/gids. "
339 "Reenabling the idmapper.\n",
340 server->nfs_client->cl_hostname);
341 }
65de872e
TM		 342 }
343 /* We failed to handle the error */
344 return nfs4_map_errors(ret);
0400a6b0 345wait_on_recovery:
a2c0b9e2
TM		 346 ret = nfs4_wait_clnt_recover(clp);
347 if (ret == 0)
348 exception->retry = 1;
349 return ret;
65de872e
TM		 350}
351
352
452e9352 353static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 354{
1da177e4
LT		 355 spin_lock(&clp->cl_lock);
356 if (time_before(clp->cl_last_renewal,timestamp))
357 clp->cl_last_renewal = timestamp;
358 spin_unlock(&clp->cl_lock);
359}
360
452e9352
TM		 361static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
362{
363 do_renew_lease(server->nfs_client, timestamp);
364}
365
cccef3b9
AA		 366#if defined(CONFIG_NFS_V4_1)
367
e2c4ab3c
AA		 368/*
369 * nfs4_free_slot - free a slot and efficiently update slot table.
370 *
371 * freeing a slot is trivially done by clearing its respective bit
372 * in the bitmap.
373 * If the freed slotid equals highest_used_slotid we want to update it
374 * so that the server would be able to size down the slot table if needed,
375 * otherwise we know that the highest_used_slotid is still in use.
376 * When updating highest_used_slotid there may be "holes" in the bitmap
377 * so we need to scan down from highest_used_slotid to 0 looking for the now
378 * highest slotid in use.
45d43c29 379 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 380 *
381 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 382 */
383static void
45d43c29 384nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 385{
45d43c29 386 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 387 /* clear used bit in bitmap */
388 __clear_bit(slotid, tbl->used_slots);
389
390 /* update highest_used_slotid when it is freed */
391 if (slotid == tbl->highest_used_slotid) {
392 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 393 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 394 tbl->highest_used_slotid = slotid;
395 else
45d43c29 396 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 397 }
45d43c29
TM		 398 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
399 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 400}
401
961a828d
TM		 402bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
403{
404 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
405 return true;
406}
407
3bfb0fc5 408/*
42acd021 409 * Signal state manager thread if session fore channel is drained
3bfb0fc5 410 */
42acd021 411static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 412{
a2118c33 413 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 414 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
415 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 416 return;
417 }
418
45d43c29 419 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 420 return;
421
42acd021
AA		 422 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
423 complete(&ses->fc_slot_table.complete);
424}
425
426/*
427 * Signal state manager thread if session back channel is drained
428 */
429void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
430{
431 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 432 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 433 return;
434 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
435 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 436}
437
d185a334 438static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 439{
440 struct nfs4_slot_table *tbl;
441
d185a334 442 tbl = &res->sr_session->fc_slot_table;
dfb4f309 443 if (!res->sr_slot) {
13615871
AA		 444 /* just wake up the next guy waiting since
445 * we may have not consumed a slot after all */
691daf3b 446 dprintk("%s: No slot\n", __func__);
35dc1d74 447 return;
13615871 448 }
ea028ac9 449
35dc1d74 450 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 451 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 452 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 453 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 454 res->sr_slot = NULL;
13615871
AA		 455}
456
14516c3a 457static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 458{
459 unsigned long timestamp;
14516c3a 460 struct nfs_client *clp;
b0df806c
AA		 461
462 /*
463 * sr_status remains 1 if an RPC level error occurred. The server
464 * may or may not have processed the sequence operation..
465 * Proceed as if the server received and processed the sequence
466 * operation.
467 */
468 if (res->sr_status == 1)
469 res->sr_status = NFS_OK;
470
468f8613
BS		 471 /* don't increment the sequence number if the task wasn't sent */
472 if (!RPC_WAS_SENT(task))
b0df806c
AA		 473 goto out;
474
691daf3b 475 /* Check the SEQUENCE operation status */
14516c3a
TM		 476 switch (res->sr_status) {
477 case 0:
b0df806c 478 /* Update the slot's sequence and clientid lease timer */
dfb4f309 479 ++res->sr_slot->seq_nr;
b0df806c 480 timestamp = res->sr_renewal_time;
14516c3a 481 clp = res->sr_session->clp;
452e9352 482 do_renew_lease(clp, timestamp);
0629e370 483 /* Check sequence flags */
b4410c2f
TM		 484 if (res->sr_status_flags != 0)
485 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 486 break;
487 case -NFS4ERR_DELAY:
488 /* The server detected a resend of the RPC call and
489 * returned NFS4ERR_DELAY as per Section 2.10.6.2
490 * of RFC5661.
491 */
12364a4f 492 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 493 __func__,
494 res->sr_slot - res->sr_session->fc_slot_table.slots,
495 res->sr_slot->seq_nr);
14516c3a
TM		 496 goto out_retry;
497 default:
498 /* Just update the slot sequence no. */
dfb4f309 499 ++res->sr_slot->seq_nr;
b0df806c
AA		 500 }
501out:
502 /* The session may be reset by one of the error handlers. */
503 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 504 nfs41_sequence_free_slot(res);
14516c3a
TM		 505 return 1;
506out_retry:
d05dd4e9 507 if (!rpc_restart_call(task))
14516c3a
TM		 508 goto out;
509 rpc_delay(task, NFS4_POLL_RETRY_MAX);
510 return 0;
b0df806c
AA		 511}
512
14516c3a
TM		 513static int nfs4_sequence_done(struct rpc_task *task,
514 struct nfs4_sequence_res *res)
df896455 515{
14516c3a
TM		 516 if (res->sr_session == NULL)
517 return 1;
518 return nfs41_sequence_done(task, res);
df896455
TM		 519}
520
510b8175
BH		 521/*
522 * nfs4_find_slot - efficiently look for a free slot
523 *
524 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
525 * If found, we mark the slot as used, update the highest_used_slotid,
526 * and respectively set up the sequence operation args.
45d43c29 527 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 528 *
529 * Note: must be called with under the slot_tbl_lock.
510b8175 530 */
45d43c29 531static u32
40ead580 532nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 533{
45d43c29
TM		 534 u32 slotid;
535 u32 ret_id = NFS4_NO_SLOT;
510b8175 536
45d43c29 537 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 538 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
539 tbl->max_slots);
540 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
541 if (slotid >= tbl->max_slots)
542 goto out;
543 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 544 if (slotid > tbl->highest_used_slotid ||
545 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 546 tbl->highest_used_slotid = slotid;
547 ret_id = slotid;
548out:
549 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
550 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 551 return ret_id;
552}
553
9d12b216
TM		 554static void nfs41_init_sequence(struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res, int cache_reply)
556{
557 args->sa_session = NULL;
558 args->sa_cache_this = 0;
559 if (cache_reply)
560 args->sa_cache_this = 1;
561 res->sr_session = NULL;
562 res->sr_slot = NULL;
563}
564
dc70d7b3 565int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 566 struct nfs4_sequence_args *args,
567 struct nfs4_sequence_res *res,
ce5039c1
AA		 568 struct rpc_task *task)
569{
fbcd4abc
AA		 570 struct nfs4_slot *slot;
571 struct nfs4_slot_table *tbl;
45d43c29 572 u32 slotid;
fbcd4abc
AA		 573
574 dprintk("--> %s\n", __func__);
ce5039c1 575 /* slot already allocated? */
dfb4f309 576 if (res->sr_slot != NULL)
ce5039c1
AA		 577 return 0;
578
fbcd4abc
AA		 579 tbl = &session->fc_slot_table;
580
581 spin_lock(&tbl->slot_tbl_lock);
a2118c33 582 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 583 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 584 /* The state manager will wait until the slot table is empty */
05f0d236 585 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 586 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 587 dprintk("%s session is draining\n", __func__);
05f0d236 588 return -EAGAIN;
b069d94a
AA		 589 }
590
689cf5c1
AB		 591 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
592 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
593 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
594 spin_unlock(&tbl->slot_tbl_lock);
595 dprintk("%s enforce FIFO order\n", __func__);
596 return -EAGAIN;
597 }
598
40ead580 599 slotid = nfs4_find_slot(tbl);
45d43c29 600 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 601 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
602 spin_unlock(&tbl->slot_tbl_lock);
603 dprintk("<-- %s: no free slots\n", __func__);
604 return -EAGAIN;
605 }
606 spin_unlock(&tbl->slot_tbl_lock);
607
689cf5c1 608 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 609 slot = tbl->slots + slotid;
99fe60d0 610 args->sa_session = session;
fbcd4abc 611 args->sa_slotid = slotid;
fbcd4abc
AA		 612
613 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
614
99fe60d0 615 res->sr_session = session;
dfb4f309 616 res->sr_slot = slot;
fbcd4abc 617 res->sr_renewal_time = jiffies;
2a6e26cd 618 res->sr_status_flags = 0;
fbcd4abc
AA		 619 /*
620 * sr_status is only set in decode_sequence, and so will remain
621 * set to 1 if an rpc level failure occurs.
622 */
623 res->sr_status = 1;
ce5039c1
AA		 624 return 0;
625}
dc70d7b3 626EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 627
035168ab 628int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 629 struct nfs4_sequence_args *args,
630 struct nfs4_sequence_res *res,
ce5039c1
AA		 631 struct rpc_task *task)
632{
035168ab 633 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 634 int ret = 0;
635
9d12b216 636 if (session == NULL)
035168ab 637 goto out;
035168ab 638
12364a4f 639 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 640 __func__, session->clp, session, res->sr_slot ?
641 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 642
9d12b216 643 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 644out:
645 dprintk("<-- %s status=%d\n", __func__, ret);
646 return ret;
647}
648
649struct nfs41_call_sync_data {
035168ab 650 const struct nfs_server *seq_server;
ce5039c1
AA		 651 struct nfs4_sequence_args *seq_args;
652 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 653};
654
655static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
035168ab
TM		 659 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
660
661 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 662 data->seq_res, task))
ce5039c1
AA		 663 return;
664 rpc_call_start(task);
665}
666
b257957e
AB		 667static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
668{
669 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
670 nfs41_call_sync_prepare(task, calldata);
671}
672
69ab40c4
AA		 673static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
674{
675 struct nfs41_call_sync_data *data = calldata;
676
14516c3a 677 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 678}
679
17280175 680static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 681 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 682 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 683};
684
17280175 685static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 686 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
687 .rpc_call_done = nfs41_call_sync_done,
688};
689
7c513058
BS		 690static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
691 struct nfs_server *server,
ce5039c1
AA		 692 struct rpc_message *msg,
693 struct nfs4_sequence_args *args,
694 struct nfs4_sequence_res *res,
b257957e 695 int privileged)
ce5039c1
AA		 696{
697 int ret;
698 struct rpc_task *task;
699 struct nfs41_call_sync_data data = {
035168ab 700 .seq_server = server,
ce5039c1
AA		 701 .seq_args = args,
702 .seq_res = res,
ce5039c1
AA		 703 };
704 struct rpc_task_setup task_setup = {
7c513058 705 .rpc_client = clnt,
ce5039c1
AA		 706 .rpc_message = msg,
707 .callback_ops = &nfs41_call_sync_ops,
708 .callback_data = &data
709 };
710
b257957e
AB		 711 if (privileged)
712 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 713 task = rpc_run_task(&task_setup);
714 if (IS_ERR(task))
715 ret = PTR_ERR(task);
716 else {
717 ret = task->tk_status;
718 rpc_put_task(task);
719 }
720 return ret;
721}
722
7c513058
BS		 723int _nfs4_call_sync_session(struct rpc_clnt *clnt,
724 struct nfs_server *server,
cccef3b9
AA		 725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res,
728 int cache_reply)
729{
9d12b216
TM		 730 nfs41_init_sequence(args, res, cache_reply);
731 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 732}
733
df896455 734#else
9d12b216
TM		 735static inline
736void nfs41_init_sequence(struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res, int cache_reply)
738{
739}
740
14516c3a
TM		 741static int nfs4_sequence_done(struct rpc_task *task,
742 struct nfs4_sequence_res *res)
df896455 743{
14516c3a 744 return 1;
df896455 745}
cccef3b9
AA		 746#endif /* CONFIG_NFS_V4_1 */
747
7c513058
BS		 748int _nfs4_call_sync(struct rpc_clnt *clnt,
749 struct nfs_server *server,
cccef3b9
AA		 750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
753 int cache_reply)
754{
9d12b216 755 nfs41_init_sequence(args, res, cache_reply);
7c513058 756 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 757}
758
e73b83f2 759static inline
7c513058
BS		 760int nfs4_call_sync(struct rpc_clnt *clnt,
761 struct nfs_server *server,
e73b83f2
BS		 762 struct rpc_message *msg,
763 struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res,
765 int cache_reply)
766{
7c513058
BS		 767 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
768 args, res, cache_reply);
e73b83f2 769}
cccef3b9 770
38478b24 771static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 772{
38478b24 773 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 774
38478b24 775 spin_lock(&dir->i_lock);
40d24704 776 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
a9a4a87a 777 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 778 nfs_force_lookup_revalidate(dir);
a9a4a87a 779 dir->i_version = cinfo->after;
38478b24 780 spin_unlock(&dir->i_lock);
1da177e4
LT		 781}
782
e56e0b78 783struct nfs4_opendata {
c6d00e63 784 struct kref kref;
e56e0b78
TM		 785 struct nfs_openargs o_arg;
786 struct nfs_openres o_res;
cdd4e68b
TM		 787 struct nfs_open_confirmargs c_arg;
788 struct nfs_open_confirmres c_res;
6926afd1
TM		 789 struct nfs4_string owner_name;
790 struct nfs4_string group_name;
e56e0b78
TM		 791 struct nfs_fattr f_attr;
792 struct nfs_fattr dir_attr;
e56e0b78 793 struct dentry *dir;
82a2c1b7 794 struct dentry *dentry;
e56e0b78 795 struct nfs4_state_owner *owner;
aac00a8d 796 struct nfs4_state *state;
e56e0b78 797 struct iattr attrs;
26e976a8 798 unsigned long timestamp;
3e309914 799 unsigned int rpc_done : 1;
24ac23ab
TM		 800 int rpc_status;
801 int cancelled;
e56e0b78
TM		 802};
803
2ced46c2
TM		 804
805static void nfs4_init_opendata_res(struct nfs4_opendata *p)
806{
807 p->o_res.f_attr = &p->f_attr;
808 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 811 p->o_res.server = p->o_arg.server;
812 nfs_fattr_init(&p->f_attr);
813 nfs_fattr_init(&p->dir_attr);
6926afd1 814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 815}
816
82a2c1b7 817static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 819 const struct iattr *attrs,
820 gfp_t gfp_mask)
e56e0b78 821{
82a2c1b7 822 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 823 struct inode *dir = parent->d_inode;
824 struct nfs_server *server = NFS_SERVER(dir);
825 struct nfs4_opendata *p;
826
8535b2be 827 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 828 if (p == NULL)
829 goto err;
8535b2be 830 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 831 if (p->o_arg.seqid == NULL)
832 goto err_free;
82a2c1b7
AV		 833 nfs_sb_active(dentry->d_sb);
834 p->dentry = dget(dentry);
e56e0b78
TM		 835 p->dir = parent;
836 p->owner = sp;
837 atomic_inc(&sp->so_count);
838 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 841 p->o_arg.clientid = server->nfs_client->cl_clientid;
48c22eb2 842 p->o_arg.id = sp->so_seqid.owner_id;
82a2c1b7 843 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 844 p->o_arg.server = server;
845 p->o_arg.bitmask = server->attr_bitmask;
6926afd1 846 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
e56e0b78 847 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 848 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 849 __be32 verf[2];
d77d76ff 850
e56e0b78
TM		 851 p->o_arg.u.attrs = &p->attrs;
852 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 853
854 verf[0] = jiffies;
855 verf[1] = current->pid;
856 memcpy(p->o_arg.u.verifier.data, verf,
857 sizeof(p->o_arg.u.verifier.data));
e56e0b78 858 }
cdd4e68b
TM		 859 p->c_arg.fh = &p->o_res.fh;
860 p->c_arg.stateid = &p->o_res.stateid;
861 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 862 nfs4_init_opendata_res(p);
c6d00e63 863 kref_init(&p->kref);
e56e0b78
TM		 864 return p;
865err_free:
866 kfree(p);
867err:
868 dput(parent);
869 return NULL;
870}
871
c6d00e63 872static void nfs4_opendata_free(struct kref *kref)
e56e0b78 873{
c6d00e63
TM		 874 struct nfs4_opendata *p = container_of(kref,
875 struct nfs4_opendata, kref);
82a2c1b7 876 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 877
878 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 879 if (p->state != NULL)
880 nfs4_put_open_state(p->state);
c6d00e63
TM		 881 nfs4_put_state_owner(p->owner);
882 dput(p->dir);
82a2c1b7
AV		 883 dput(p->dentry);
884 nfs_sb_deactive(sb);
6926afd1 885 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 886 kfree(p);
887}
888
889static void nfs4_opendata_put(struct nfs4_opendata *p)
890{
891 if (p != NULL)
892 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 893}
894
06f814a3
TM		 895static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
896{
06f814a3
TM		 897 int ret;
898
06f814a3 899 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 900 return ret;
901}
902
dc0b027d 903static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 904{
905 int ret = 0;
dc0b027d 906
536e43d1 907 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 908 goto out;
909 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 910 case FMODE_READ:
88069f77
TM		 911 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
912 && state->n_rdonly != 0;
6ee41268
TM		 913 break;
914 case FMODE_WRITE:
88069f77
TM		 915 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
916 && state->n_wronly != 0;
6ee41268
TM		 917 break;
918 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 919 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
920 && state->n_rdwr != 0;
6ee41268 921 }
dc0b027d 922out:
6ee41268
TM		 923 return ret;
924}
925
dc0b027d 926static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 927{
652f89f6
TM		 928 if (delegation == NULL)
929 return 0;
dc0b027d 930 if ((delegation->type & fmode) != fmode)
aac00a8d 931 return 0;
15c831bf 932 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 933 return 0;
b7391f44 934 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 935 return 1;
936}
937
dc0b027d 938static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 939{
dc0b027d 940 switch (fmode) {
e7616923
TM		 941 case FMODE_WRITE:
942 state->n_wronly++;
943 break;
944 case FMODE_READ:
945 state->n_rdonly++;
946 break;
947 case FMODE_READ|FMODE_WRITE:
948 state->n_rdwr++;
949 }
dc0b027d 950 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 951}
952
dc0b027d 953static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 954{
955 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 956 nfs4_stateid_copy(&state->stateid, stateid);
957 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 958 switch (fmode) {
003707c7
TM		 959 case FMODE_READ:
960 set_bit(NFS_O_RDONLY_STATE, &state->flags);
961 break;
962 case FMODE_WRITE:
963 set_bit(NFS_O_WRONLY_STATE, &state->flags);
964 break;
965 case FMODE_READ|FMODE_WRITE:
966 set_bit(NFS_O_RDWR_STATE, &state->flags);
967 }
e7616923
TM		 968}
969
dc0b027d 970static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 971{
8bda4e4c 972 write_seqlock(&state->seqlock);
dc0b027d 973 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 974 write_sequnlock(&state->seqlock);
003707c7
TM		 975}
976
dc0b027d 977static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 978{
8bda4e4c
TM		 979 /*
980 * Protect the call to nfs4_state_set_mode_locked and
981 * serialise the stateid update
982 */
983 write_seqlock(&state->seqlock);
003707c7 984 if (deleg_stateid != NULL) {
f597c537 985 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 986 set_bit(NFS_DELEGATED_STATE, &state->flags);
987 }
988 if (open_stateid != NULL)
dc0b027d 989 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 990 write_sequnlock(&state->seqlock);
991 spin_lock(&state->owner->so_lock);
dc0b027d 992 update_open_stateflags(state, fmode);
ec073428 993 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 994}
995
dc0b027d 996static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 997{
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_delegation *deleg_cur;
1000 int ret = 0;
1001
dc0b027d 1002 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1003
1004 rcu_read_lock();
1005 deleg_cur = rcu_dereference(nfsi->delegation);
1006 if (deleg_cur == NULL)
1007 goto no_delegation;
1008
1009 spin_lock(&deleg_cur->lock);
1010 if (nfsi->delegation != deleg_cur ||
dc0b027d 1011 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1012 goto no_delegation_unlock;
1013
1014 if (delegation == NULL)
1015 delegation = &deleg_cur->stateid;
f597c537 1016 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1017 goto no_delegation_unlock;
1018
b7391f44 1019 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1020 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1021 ret = 1;
1022no_delegation_unlock:
1023 spin_unlock(&deleg_cur->lock);
1024no_delegation:
1025 rcu_read_unlock();
1026
1027 if (!ret && open_stateid != NULL) {
dc0b027d 1028 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1029 ret = 1;
1030 }
1031
1032 return ret;
1033}
1034
1035
dc0b027d 1036static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1037{
1038 struct nfs_delegation *delegation;
1039
1040 rcu_read_lock();
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1042 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1043 rcu_read_unlock();
1044 return;
1045 }
1046 rcu_read_unlock();
1047 nfs_inode_return_delegation(inode);
1048}
1049
6ee41268 1050static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1051{
1052 struct nfs4_state *state = opendata->state;
1053 struct nfs_inode *nfsi = NFS_I(state->inode);
1054 struct nfs_delegation *delegation;
536e43d1 1055 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1056 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1057 nfs4_stateid stateid;
1058 int ret = -EAGAIN;
1059
aac00a8d 1060 for (;;) {
dc0b027d 1061 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1062 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1063 if (can_open_cached(state, fmode, open_mode)) {
1064 update_open_stateflags(state, fmode);
6ee41268 1065 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1066 goto out_return_state;
1067 }
1068 spin_unlock(&state->owner->so_lock);
1069 }
34310430
TM		 1070 rcu_read_lock();
1071 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1072 if (!can_open_delegated(delegation, fmode)) {
34310430 1073 rcu_read_unlock();
aac00a8d 1074 break;
34310430 1075 }
aac00a8d 1076 /* Save the delegation */
f597c537 1077 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1078 rcu_read_unlock();
af22f94a 1079 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1080 if (ret != 0)
1081 goto out;
1082 ret = -EAGAIN;
34310430
TM		 1083
1084 /* Try to update the stateid using the delegation */
dc0b027d 1085 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1086 goto out_return_state;
aac00a8d 1087 }
aac00a8d
TM		 1088out:
1089 return ERR_PTR(ret);
1090out_return_state:
1091 atomic_inc(&state->count);
1092 return state;
1093}
1094
24ac23ab
TM		 1095static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1096{
1097 struct inode *inode;
1098 struct nfs4_state *state = NULL;
003707c7 1099 struct nfs_delegation *delegation;
1b370bc2 1100 int ret;
24ac23ab 1101
aac00a8d 1102 if (!data->rpc_done) {
6ee41268 1103 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1104 goto out;
1105 }
1106
1b370bc2 1107 ret = -EAGAIN;
24ac23ab 1108 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1109 goto err;
24ac23ab 1110 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1111 ret = PTR_ERR(inode);
03f28e3a 1112 if (IS_ERR(inode))
1b370bc2
TM		 1113 goto err;
1114 ret = -ENOMEM;
24ac23ab
TM		 1115 state = nfs4_get_open_state(inode, data->owner);
1116 if (state == NULL)
1b370bc2 1117 goto err_put_inode;
549d6ed5 1118 if (data->o_res.delegation_type != 0) {
4e0038b6 1119 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1120 int delegation_flags = 0;
1121
003707c7
TM		 1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
652f89f6
TM		 1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1131 clp->cl_hostname);
652f89f6 1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140 }
34310430
TM		 1141
1142 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1143 data->o_arg.fmode);
24ac23ab 1144 iput(inode);
aac00a8d 1145out:
24ac23ab 1146 return state;
1b370bc2
TM		 1147err_put_inode:
1148 iput(inode);
1149err:
1150 return ERR_PTR(ret);
24ac23ab
TM		 1151}
1152
864472e9
TM		 1153static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1154{
1155 struct nfs_inode *nfsi = NFS_I(state->inode);
1156 struct nfs_open_context *ctx;
1157
1158 spin_lock(&state->inode->i_lock);
1159 list_for_each_entry(ctx, &nfsi->open_files, list) {
1160 if (ctx->state != state)
1161 continue;
1162 get_nfs_open_context(ctx);
1163 spin_unlock(&state->inode->i_lock);
1164 return ctx;
1165 }
1166 spin_unlock(&state->inode->i_lock);
1167 return ERR_PTR(-ENOENT);
1168}
1169
6f220ed5
TM		 1170static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1171{
1172 struct nfs4_opendata *opendata;
1173
3d4ff43d 1174 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1175 if (opendata == NULL)
1176 return ERR_PTR(-ENOMEM);
1177 opendata->state = state;
1178 atomic_inc(&state->count);
1179 return opendata;
1180}
1181
dc0b027d 1182static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1183{
2ced46c2 1184 struct nfs4_state *newstate;
864472e9
TM		 1185 int ret;
1186
dc0b027d
TM		 1187 opendata->o_arg.open_flags = 0;
1188 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1189 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1190 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1191 nfs4_init_opendata_res(opendata);
b257957e 1192 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1193 if (ret != 0)
1194 return ret;
2ced46c2 1195 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1196 if (IS_ERR(newstate))
1197 return PTR_ERR(newstate);
643168c2 1198 nfs4_close_state(newstate, fmode);
2ced46c2 1199 *res = newstate;
864472e9
TM		 1200 return 0;
1201}
1202
1203static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1204{
864472e9 1205 struct nfs4_state *newstate;
864472e9
TM		 1206 int ret;
1207
1208 /* memory barrier prior to reading state->n_* */
2ced46c2 1209 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1210 smp_rmb();
1211 if (state->n_rdwr != 0) {
b0ed9dbc 1212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1214 if (ret != 0)
1215 return ret;
2ced46c2
TM		 1216 if (newstate != state)
1217 return -ESTALE;
864472e9
TM		 1218 }
1219 if (state->n_wronly != 0) {
b0ed9dbc 1220 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1221 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1222 if (ret != 0)
1223 return ret;
2ced46c2
TM		 1224 if (newstate != state)
1225 return -ESTALE;
864472e9
TM		 1226 }
1227 if (state->n_rdonly != 0) {
b0ed9dbc 1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1229 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1230 if (ret != 0)
1231 return ret;
2ced46c2
TM		 1232 if (newstate != state)
1233 return -ESTALE;
864472e9 1234 }
1ac7e2fd
TM		 1235 /*
1236 * We may have performed cached opens for all three recoveries.
1237 * Check if we need to update the current stateid.
1238 */
1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1240 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1241 write_seqlock(&state->seqlock);
1ac7e2fd 1242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1243 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1244 write_sequnlock(&state->seqlock);
1ac7e2fd 1245 }
864472e9
TM		 1246 return 0;
1247}
1248
1da177e4
LT		 1249/*
1250 * OPEN_RECLAIM:
1251 * reclaim state on the server after a reboot.
1da177e4 1252 */
539cd03a 1253static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1254{
1ac7e2fd 1255 struct nfs_delegation *delegation;
864472e9 1256 struct nfs4_opendata *opendata;
dc0b027d 1257 fmode_t delegation_type = 0;
1da177e4
LT		 1258 int status;
1259
6f220ed5
TM		 1260 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1261 if (IS_ERR(opendata))
1262 return PTR_ERR(opendata);
864472e9
TM		 1263 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1264 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1265 rcu_read_lock();
1266 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1267 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1268 delegation_type = delegation->type;
1ac7e2fd 1269 rcu_read_unlock();
864472e9
TM		 1270 opendata->o_arg.u.delegation_type = delegation_type;
1271 status = nfs4_open_recover(opendata, state);
c6d00e63 1272 nfs4_opendata_put(opendata);
1da177e4
LT		 1273 return status;
1274}
1275
539cd03a 1276static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1277{
1278 struct nfs_server *server = NFS_SERVER(state->inode);
1279 struct nfs4_exception exception = { };
1280 int err;
1281 do {
539cd03a 1282 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1283 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1284 break;
1285 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1286 } while (exception.retry);
1287 return err;
1288}
1289
864472e9
TM		 1290static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1291{
1292 struct nfs_open_context *ctx;
1293 int ret;
1294
1295 ctx = nfs4_state_find_open_context(state);
1296 if (IS_ERR(ctx))
1297 return PTR_ERR(ctx);
539cd03a 1298 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1299 put_nfs_open_context(ctx);
1300 return ret;
1301}
1302
13437e12 1303static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1304{
e56e0b78 1305 struct nfs4_opendata *opendata;
864472e9 1306 int ret;
1da177e4 1307
6f220ed5
TM		 1308 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1309 if (IS_ERR(opendata))
1310 return PTR_ERR(opendata);
e56e0b78 1311 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1312 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1313 ret = nfs4_open_recover(opendata, state);
c6d00e63 1314 nfs4_opendata_put(opendata);
864472e9 1315 return ret;
1da177e4
LT		 1316}
1317
13437e12 1318int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1319{
1320 struct nfs4_exception exception = { };
539cd03a 1321 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1322 int err;
1323 do {
13437e12 1324 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1325 switch (err) {
1326 case 0:
965b5d67
TM		 1327 case -ENOENT:
1328 case -ESTALE:
1329 goto out;
bcfa49f6
RL		 1330 case -NFS4ERR_BADSESSION:
1331 case -NFS4ERR_BADSLOT:
1332 case -NFS4ERR_BAD_HIGH_SLOT:
1333 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1334 case -NFS4ERR_DEADSESSION:
0400a6b0 1335 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1336 goto out;
1da177e4
LT		 1337 case -NFS4ERR_STALE_CLIENTID:
1338 case -NFS4ERR_STALE_STATEID:
1339 case -NFS4ERR_EXPIRED:
1340 /* Don't recall a delegation if it was lost */
0400a6b0 1341 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1342 goto out;
1343 case -ERESTARTSYS:
1344 /*
1345 * The show must go on: exit, but mark the
1346 * stateid as needing recovery.
1347 */
a1d0b5ee 1348 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1349 case -NFS4ERR_ADMIN_REVOKED:
1350 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1351 nfs_inode_find_state_and_recover(state->inode,
1352 stateid);
0400a6b0 1353 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1354 case -EKEYEXPIRED:
1355 /*
1356 * User RPCSEC_GSS context has expired.
1357 * We cannot recover this stateid now, so
1358 * skip it and allow recovery thread to
1359 * proceed.
1360 */
965b5d67
TM		 1361 case -ENOMEM:
1362 err = 0;
1363 goto out;
1da177e4
LT		 1364 }
1365 err = nfs4_handle_exception(server, err, &exception);
1366 } while (exception.retry);
965b5d67 1367out:
1da177e4
LT		 1368 return err;
1369}
1370
cdd4e68b
TM		 1371static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1372{
1373 struct nfs4_opendata *data = calldata;
1374
1375 data->rpc_status = task->tk_status;
26e976a8 1376 if (data->rpc_status == 0) {
f597c537 1377 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1378 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1379 renew_lease(data->o_res.server, data->timestamp);
3e309914 1380 data->rpc_done = 1;
26e976a8 1381 }
cdd4e68b
TM		 1382}
1383
1384static void nfs4_open_confirm_release(void *calldata)
1385{
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1388
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1391 goto out_free;
1392 /* In case of error, no cleanup! */
3e309914 1393 if (!data->rpc_done)
cdd4e68b 1394 goto out_free;
cdd4e68b 1395 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1396 if (!IS_ERR(state))
643168c2 1397 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1398out_free:
c6d00e63 1399 nfs4_opendata_put(data);
cdd4e68b
TM		 1400}
1401
1402static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1403 .rpc_call_done = nfs4_open_confirm_done,
1404 .rpc_release = nfs4_open_confirm_release,
1405};
1406
1407/*
1408 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1409 */
1410static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1411{
1412 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1413 struct rpc_task *task;
5138fde0
TM		 1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1416 .rpc_argp = &data->c_arg,
1417 .rpc_resp = &data->c_res,
1418 .rpc_cred = data->owner->so_cred,
1419 };
c970aa85
TM		 1420 struct rpc_task_setup task_setup_data = {
1421 .rpc_client = server->client,
5138fde0 1422 .rpc_message = &msg,
c970aa85
TM		 1423 .callback_ops = &nfs4_open_confirm_ops,
1424 .callback_data = data,
101070ca 1425 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1426 .flags = RPC_TASK_ASYNC,
1427 };
1da177e4
LT		 1428 int status;
1429
c6d00e63 1430 kref_get(&data->kref);
3e309914
TM		 1431 data->rpc_done = 0;
1432 data->rpc_status = 0;
5138fde0 1433 data->timestamp = jiffies;
c970aa85 1434 task = rpc_run_task(&task_setup_data);
7a1218a2 1435 if (IS_ERR(task))
cdd4e68b 1436 return PTR_ERR(task);
cdd4e68b
TM		 1437 status = nfs4_wait_for_completion_rpc_task(task);
1438 if (status != 0) {
1439 data->cancelled = 1;
1440 smp_wmb();
1441 } else
1442 status = data->rpc_status;
e6b3c4db 1443 rpc_put_task(task);
1da177e4
LT		 1444 return status;
1445}
1446
24ac23ab 1447static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1448{
24ac23ab
TM		 1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state_owner *sp = data->owner;
5138fde0 1451
24ac23ab
TM		 1452 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 return;
aac00a8d
TM		 1454 /*
1455 * Check if we still need to send an OPEN call, or if we can use
1456 * a delegation instead.
1457 */
1458 if (data->state != NULL) {
1459 struct nfs_delegation *delegation;
1460
dc0b027d 1461 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1462 goto out_no_action;
aac00a8d
TM		 1463 rcu_read_lock();
1464 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1465 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1466 can_open_delegated(delegation, data->o_arg.fmode))
1467 goto unlock_no_action;
aac00a8d
TM		 1468 rcu_read_unlock();
1469 }
24ac23ab 1470 /* Update sequence id. */
48c22eb2 1471 data->o_arg.id = sp->so_seqid.owner_id;
1f0e890d 1472 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1473 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1474 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1475 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1476 }
26e976a8 1477 data->timestamp = jiffies;
035168ab 1478 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1479 &data->o_arg.seq_args,
9d12b216 1480 &data->o_res.seq_res, task))
d898528c 1481 return;
5138fde0 1482 rpc_call_start(task);
6ee41268 1483 return;
652f89f6
TM		 1484unlock_no_action:
1485 rcu_read_unlock();
6ee41268
TM		 1486out_no_action:
1487 task->tk_action = NULL;
1488
24ac23ab 1489}
1da177e4 1490
b257957e
AB		 1491static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1492{
1493 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1494 nfs4_open_prepare(task, calldata);
1495}
1496
24ac23ab
TM		 1497static void nfs4_open_done(struct rpc_task *task, void *calldata)
1498{
1499 struct nfs4_opendata *data = calldata;
1da177e4 1500
24ac23ab 1501 data->rpc_status = task->tk_status;
d898528c 1502
14516c3a
TM		 1503 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1504 return;
d898528c 1505
24ac23ab
TM		 1506 if (task->tk_status == 0) {
1507 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1508 case S_IFREG:
1509 break;
1510 case S_IFLNK:
24ac23ab 1511 data->rpc_status = -ELOOP;
6f926b5b
TM		 1512 break;
1513 case S_IFDIR:
24ac23ab 1514 data->rpc_status = -EISDIR;
6f926b5b
TM		 1515 break;
1516 default:
24ac23ab 1517 data->rpc_status = -ENOTDIR;
6f926b5b 1518 }
26e976a8 1519 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1520 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1521 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1522 }
3e309914 1523 data->rpc_done = 1;
24ac23ab 1524}
6f926b5b 1525
24ac23ab
TM		 1526static void nfs4_open_release(void *calldata)
1527{
1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state *state = NULL;
1530
1531 /* If this request hasn't been cancelled, do nothing */
1532 if (data->cancelled == 0)
1533 goto out_free;
1534 /* In case of error, no cleanup! */
3e309914 1535 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1536 goto out_free;
1537 /* In case we need an open_confirm, no cleanup! */
1538 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1539 goto out_free;
24ac23ab 1540 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1541 if (!IS_ERR(state))
643168c2 1542 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1543out_free:
c6d00e63 1544 nfs4_opendata_put(data);
24ac23ab
TM		 1545}
1546
1547static const struct rpc_call_ops nfs4_open_ops = {
1548 .rpc_call_prepare = nfs4_open_prepare,
1549 .rpc_call_done = nfs4_open_done,
1550 .rpc_release = nfs4_open_release,
1551};
1552
b257957e
AB		 1553static const struct rpc_call_ops nfs4_recover_open_ops = {
1554 .rpc_call_prepare = nfs4_recover_open_prepare,
1555 .rpc_call_done = nfs4_open_done,
1556 .rpc_release = nfs4_open_release,
1557};
1558
1559static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1560{
1561 struct inode *dir = data->dir->d_inode;
1562 struct nfs_server *server = NFS_SERVER(dir);
1563 struct nfs_openargs *o_arg = &data->o_arg;
1564 struct nfs_openres *o_res = &data->o_res;
1565 struct rpc_task *task;
5138fde0
TM		 1566 struct rpc_message msg = {
1567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1568 .rpc_argp = o_arg,
1569 .rpc_resp = o_res,
1570 .rpc_cred = data->owner->so_cred,
1571 };
c970aa85
TM		 1572 struct rpc_task_setup task_setup_data = {
1573 .rpc_client = server->client,
5138fde0 1574 .rpc_message = &msg,
c970aa85
TM		 1575 .callback_ops = &nfs4_open_ops,
1576 .callback_data = data,
101070ca 1577 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1578 .flags = RPC_TASK_ASYNC,
1579 };
24ac23ab
TM		 1580 int status;
1581
9d12b216 1582 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1583 kref_get(&data->kref);
3e309914
TM		 1584 data->rpc_done = 0;
1585 data->rpc_status = 0;
2ced46c2 1586 data->cancelled = 0;
b257957e
AB		 1587 if (isrecover)
1588 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1589 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1590 if (IS_ERR(task))
1591 return PTR_ERR(task);
1592 status = nfs4_wait_for_completion_rpc_task(task);
1593 if (status != 0) {
1594 data->cancelled = 1;
1595 smp_wmb();
1596 } else
1597 status = data->rpc_status;
1598 rpc_put_task(task);
1599
1600 return status;
1601}
1602
1603static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1604{
1605 struct inode *dir = data->dir->d_inode;
1606 struct nfs_openres *o_res = &data->o_res;
1607 int status;
1608
1609 status = nfs4_run_open_task(data, 1);
1610 if (status != 0 || !data->rpc_done)
1611 return status;
1612
6926afd1
TM		 1613 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1614
b257957e
AB		 1615 nfs_refresh_inode(dir, o_res->dir_attr);
1616
1617 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1618 status = _nfs4_proc_open_confirm(data);
1619 if (status != 0)
1620 return status;
1621 }
1622
1623 return status;
1624}
1625
1626/*
1627 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1628 */
1629static int _nfs4_proc_open(struct nfs4_opendata *data)
1630{
1631 struct inode *dir = data->dir->d_inode;
1632 struct nfs_server *server = NFS_SERVER(dir);
1633 struct nfs_openargs *o_arg = &data->o_arg;
1634 struct nfs_openres *o_res = &data->o_res;
1635 int status;
1636
1637 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1638 if (!data->rpc_done)
1639 return status;
1640 if (status != 0) {
1641 if (status == -NFS4ERR_BADNAME &&
1642 !(o_arg->open_flags & O_CREAT))
1643 return -ENOENT;
24ac23ab 1644 return status;
08ef7bd3 1645 }
24ac23ab 1646
6926afd1
TM		 1647 nfs_fattr_map_and_free_names(server, &data->f_attr);
1648
56ae19f3
TM		 1649 if (o_arg->open_flags & O_CREAT) {
1650 update_changeattr(dir, &o_res->cinfo);
1651 nfs_post_op_update_inode(dir, o_res->dir_attr);
1652 } else
1653 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1654 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1655 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1656 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1657 status = _nfs4_proc_open_confirm(data);
1da177e4 1658 if (status != 0)
24ac23ab 1659 return status;
1da177e4
LT		 1660 }
1661 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1662 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1663 return 0;
1da177e4
LT		 1664}
1665
d83217c1 1666static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1667{
a78cb57a 1668 unsigned int loop;
6b30954e 1669 int ret;
58d9714a 1670
a78cb57a 1671 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1672 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1673 if (ret != 0)
a78cb57a 1674 break;
e598d843
TM		 1675 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1676 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1677 break;
0400a6b0 1678 nfs4_schedule_state_manager(clp);
a78cb57a 1679 ret = -EIO;
6b30954e 1680 }
a78cb57a 1681 return ret;
58d9714a
TM		 1682}
1683
d83217c1
AA		 1684static int nfs4_recover_expired_lease(struct nfs_server *server)
1685{
1686 return nfs4_client_recover_expired_lease(server->nfs_client);
1687}
1688
1da177e4
LT		 1689/*
1690 * OPEN_EXPIRED:
1691 * reclaim state on the server after a network partition.
1692 * Assumes caller holds the appropriate lock
1693 */
539cd03a 1694static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1695{
e56e0b78 1696 struct nfs4_opendata *opendata;
864472e9 1697 int ret;
1da177e4 1698
6f220ed5
TM		 1699 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1700 if (IS_ERR(opendata))
1701 return PTR_ERR(opendata);
864472e9 1702 ret = nfs4_open_recover(opendata, state);
35d05778 1703 if (ret == -ESTALE)
3d4ff43d 1704 d_drop(ctx->dentry);
c6d00e63 1705 nfs4_opendata_put(opendata);
864472e9 1706 return ret;
1da177e4
LT		 1707}
1708
a9ed2e25 1709static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1710{
539cd03a 1711 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1712 struct nfs4_exception exception = { };
1713 int err;
1714
1715 do {
539cd03a 1716 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1717 switch (err) {
1718 default:
1719 goto out;
1720 case -NFS4ERR_GRACE:
1721 case -NFS4ERR_DELAY:
1722 nfs4_handle_exception(server, err, &exception);
1723 err = 0;
1724 }
202b50dc 1725 } while (exception.retry);
a9ed2e25 1726out:
202b50dc
TM		 1727 return err;
1728}
1729
1da177e4
LT		 1730static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1731{
1da177e4 1732 struct nfs_open_context *ctx;
864472e9 1733 int ret;
1da177e4 1734
864472e9
TM		 1735 ctx = nfs4_state_find_open_context(state);
1736 if (IS_ERR(ctx))
1737 return PTR_ERR(ctx);
539cd03a 1738 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1739 put_nfs_open_context(ctx);
1740 return ret;
1da177e4
LT		 1741}
1742
f062eb6c 1743#if defined(CONFIG_NFS_V4_1)
b01dd1d8 1744static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
f062eb6c 1745{
b01dd1d8 1746 int status = NFS_OK;
f062eb6c
BS		 1747 struct nfs_server *server = NFS_SERVER(state->inode);
1748
b01dd1d8
BS		 1749 if (state->flags & flags) {
1750 status = nfs41_test_stateid(server, stateid);
1751 if (status != NFS_OK) {
1752 nfs41_free_stateid(server, stateid);
1753 state->flags &= ~flags;
1754 }
1755 }
1756 return status;
1757}
1758
1759static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1760{
1761 int deleg_status, open_status;
1762 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1763 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1764
1765 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1766 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1767
1768 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1769 return NFS_OK;
f062eb6c
BS		 1770 return nfs4_open_expired(sp, state);
1771}
1772#endif
1773
aa53ed54
JL		 1774/*
1775 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1776 * fields corresponding to attributes that were used to store the verifier.
1777 * Make sure we clobber those fields in the later setattr call
1778 */
1779static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1780{
1781 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1782 !(sattr->ia_valid & ATTR_ATIME_SET))
1783 sattr->ia_valid |= ATTR_ATIME;
1784
1785 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1786 !(sattr->ia_valid & ATTR_MTIME_SET))
1787 sattr->ia_valid |= ATTR_MTIME;
1788}
1789
1da177e4 1790/*
24ac23ab 1791 * Returns a referenced nfs4_state
1da177e4 1792 */
82a2c1b7 1793static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1794{
1795 struct nfs4_state_owner *sp;
1796 struct nfs4_state *state = NULL;
1797 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1798 struct nfs4_opendata *opendata;
aac00a8d 1799 int status;
1da177e4
LT		 1800
1801 /* Protect against reboot recovery conflicts */
1da177e4 1802 status = -ENOMEM;
d1e284d5
TM		 1803 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1804 if (sp == NULL) {
1da177e4
LT		 1805 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1806 goto out_err;
1807 }
58d9714a
TM		 1808 status = nfs4_recover_expired_lease(server);
1809 if (status != 0)
b4454fe1 1810 goto err_put_state_owner;
82a2c1b7
AV		 1811 if (dentry->d_inode != NULL)
1812 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1813 status = -ENOMEM;
82a2c1b7 1814 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1815 if (opendata == NULL)
95d35cb4 1816 goto err_put_state_owner;
1da177e4 1817
82a2c1b7
AV		 1818 if (dentry->d_inode != NULL)
1819 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1820
24ac23ab 1821 status = _nfs4_proc_open(opendata);
1da177e4 1822 if (status != 0)
c6d00e63 1823 goto err_opendata_put;
1da177e4 1824
24ac23ab 1825 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1826 status = PTR_ERR(state);
1827 if (IS_ERR(state))
c6d00e63 1828 goto err_opendata_put;
0df5dd4a 1829 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1830 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1831
1832 if (opendata->o_arg.open_flags & O_EXCL) {
1833 nfs4_exclusive_attrset(opendata, sattr);
1834
1835 nfs_fattr_init(opendata->o_res.f_attr);
1836 status = nfs4_do_setattr(state->inode, cred,
1837 opendata->o_res.f_attr, sattr,
1838 state);
1839 if (status == 0)
1840 nfs_setattr_update_inode(state->inode, sattr);
1841 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1842 }
c6d00e63 1843 nfs4_opendata_put(opendata);
1da177e4 1844 nfs4_put_state_owner(sp);
1da177e4
LT		 1845 *res = state;
1846 return 0;
c6d00e63
TM		 1847err_opendata_put:
1848 nfs4_opendata_put(opendata);
e56e0b78
TM		 1849err_put_state_owner:
1850 nfs4_put_state_owner(sp);
1da177e4 1851out_err:
1da177e4
LT		 1852 *res = NULL;
1853 return status;
1854}
1855
1856
82a2c1b7 1857static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1858{
1859 struct nfs4_exception exception = { };
1860 struct nfs4_state *res;
1861 int status;
1862
1863 do {
82a2c1b7 1864 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1865 if (status == 0)
1866 break;
1867 /* NOTE: BAD_SEQID means the server and client disagree about the
1868 * book-keeping w.r.t. state-changing operations
1869 * (OPEN/CLOSE/LOCK/LOCKU...)
1870 * It is actually a sign of a bug on the client or on the server.
1871 *
1872 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1873 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1874 * have unhashed the old state_owner for us, and that we can
1875 * therefore safely retry using a new one. We should still warn
1876 * the user though...
1877 */
1878 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1879 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1880 " returned a bad sequence-id error!\n",
1881 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1882 exception.retry = 1;
1883 continue;
1884 }
550f5747
TM		 1885 /*
1886 * BAD_STATEID on OPEN means that the server cancelled our
1887 * state before it received the OPEN_CONFIRM.
1888 * Recover by retrying the request as per the discussion
1889 * on Page 181 of RFC3530.
1890 */
1891 if (status == -NFS4ERR_BAD_STATEID) {
1892 exception.retry = 1;
1893 continue;
1894 }
aac00a8d
TM		 1895 if (status == -EAGAIN) {
1896 /* We must have found a delegation */
1897 exception.retry = 1;
1898 continue;
1899 }
1da177e4
LT		 1900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1901 status, &exception));
1902 } while (exception.retry);
1903 return res;
1904}
1905
659bfcd6
TM		 1906static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1907 struct nfs_fattr *fattr, struct iattr *sattr,
1908 struct nfs4_state *state)
1da177e4 1909{
3e4f6290 1910 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1911 struct nfs_setattrargs arg = {
3e4f6290 1912 .fh = NFS_FH(inode),
1da177e4
LT		 1913 .iap = sattr,
1914 .server = server,
1915 .bitmask = server->attr_bitmask,
1916 };
1917 struct nfs_setattrres res = {
1918 .fattr = fattr,
1919 .server = server,
1920 };
1921 struct rpc_message msg = {
659bfcd6
TM		 1922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1923 .rpc_argp = &arg,
1924 .rpc_resp = &res,
1925 .rpc_cred = cred,
1da177e4 1926 };
26e976a8 1927 unsigned long timestamp = jiffies;
65e4308d 1928 int status;
1da177e4 1929
0e574af1 1930 nfs_fattr_init(fattr);
1da177e4 1931
4fc8796d
TM		 1932 if (state != NULL) {
1933 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1934 current->files, current->tgid);
1935 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1936 FMODE_WRITE)) {
3e4f6290 1937 /* Use that stateid */
08e9eac4 1938 } else
f597c537 1939 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 1940
7c513058 1941 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1942 if (status == 0 && state != NULL)
1943 renew_lease(server, timestamp);
65e4308d 1944 return status;
1da177e4
LT		 1945}
1946
659bfcd6
TM		 1947static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1948 struct nfs_fattr *fattr, struct iattr *sattr,
1949 struct nfs4_state *state)
1da177e4 1950{
3e4f6290 1951 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 1952 struct nfs4_exception exception = {
1953 .state = state,
3114ea7a 1954 .inode = inode,
a1d0b5ee 1955 };
1da177e4
LT		 1956 int err;
1957 do {
1958 err = nfs4_handle_exception(server,
659bfcd6 1959 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1960 &exception);
1961 } while (exception.retry);
1962 return err;
1963}
1964
1965struct nfs4_closedata {
1966 struct inode *inode;
1967 struct nfs4_state *state;
1968 struct nfs_closeargs arg;
1969 struct nfs_closeres res;
516a6af6 1970 struct nfs_fattr fattr;
26e976a8 1971 unsigned long timestamp;
f7e8917a
FI		 1972 bool roc;
1973 u32 roc_barrier;
1da177e4
LT		 1974};
1975
963d8fe5 1976static void nfs4_free_closedata(void *data)
9512135d 1977{
963d8fe5
TM		 1978 struct nfs4_closedata *calldata = data;
1979 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1980 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1981
f7e8917a
FI		 1982 if (calldata->roc)
1983 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1984 nfs4_put_open_state(calldata->state);
1985 nfs_free_seqid(calldata->arg.seqid);
9512135d 1986 nfs4_put_state_owner(sp);
643168c2 1987 nfs_sb_deactive(sb);
9512135d
TM		 1988 kfree(calldata);
1989}
1990
88069f77
TM		 1991static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1992 fmode_t fmode)
1993{
1994 spin_lock(&state->owner->so_lock);
1995 if (!(fmode & FMODE_READ))
1996 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1997 if (!(fmode & FMODE_WRITE))
1998 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1999 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2000 spin_unlock(&state->owner->so_lock);
2001}
2002
963d8fe5 2003static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2004{
963d8fe5 2005 struct nfs4_closedata *calldata = data;
1da177e4 2006 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2007 struct nfs_server *server = NFS_SERVER(calldata->inode);
2008
a3ca5651 2009 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2010 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2011 return;
1da177e4
LT		 2012 /* hmm. we are done with the inode, and in the process of freeing
2013 * the state_owner. we keep this around to process errors
2014 */
1da177e4
LT		 2015 switch (task->tk_status) {
2016 case 0:
f7e8917a
FI		 2017 if (calldata->roc)
2018 pnfs_roc_set_barrier(state->inode,
2019 calldata->roc_barrier);
45328c35 2020 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2021 renew_lease(server, calldata->timestamp);
88069f77
TM		 2022 nfs4_close_clear_stateid_flags(state,
2023 calldata->arg.fmode);
1da177e4
LT		 2024 break;
2025 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2026 case -NFS4ERR_OLD_STATEID:
2027 case -NFS4ERR_BAD_STATEID:
1da177e4 2028 case -NFS4ERR_EXPIRED:
dc0b027d 2029 if (calldata->arg.fmode == 0)
9e33bed5 2030 break;
1da177e4 2031 default:
72211dbe
TM		 2032 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2033 rpc_restart_call_prepare(task);
1da177e4 2034 }
72211dbe 2035 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2036 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2037 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2038}
2039
4ce70ada 2040static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2041{
4ce70ada 2042 struct nfs4_closedata *calldata = data;
9512135d 2043 struct nfs4_state *state = calldata->state;
88069f77 2044 int call_close = 0;
9512135d 2045
a3ca5651 2046 dprintk("%s: begin!\n", __func__);
963d8fe5 2047 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2048 return;
003707c7 2049
88069f77
TM		 2050 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2051 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2052 spin_lock(&state->owner->so_lock);
003707c7 2053 /* Calculate the change in open mode */
e7616923 2054 if (state->n_rdwr == 0) {
003707c7 2055 if (state->n_rdonly == 0) {
88069f77
TM		 2056 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2057 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2058 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2059 }
2060 if (state->n_wronly == 0) {
88069f77
TM		 2061 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2062 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2063 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2064 }
e7616923 2065 }
4cecb76f 2066 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2067
2068 if (!call_close) {
963d8fe5
TM		 2069 /* Note: exit _without_ calling nfs4_close_done */
2070 task->tk_action = NULL;
a3ca5651 2071 goto out;
9512135d 2072 }
88069f77 2073
f7e8917a 2074 if (calldata->arg.fmode == 0) {
88069f77 2075 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2076 if (calldata->roc &&
2077 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2078 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2079 task, NULL);
a3ca5651 2080 goto out;
f7e8917a
FI		 2081 }
2082 }
88069f77 2083
516a6af6 2084 nfs_fattr_init(calldata->res.fattr);
26e976a8 2085 calldata->timestamp = jiffies;
035168ab 2086 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2087 &calldata->arg.seq_args,
2088 &calldata->res.seq_res,
2089 task))
a3ca5651 2090 goto out;
5138fde0 2091 rpc_call_start(task);
a3ca5651
CL		 2092out:
2093 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2094}
2095
963d8fe5 2096static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2097 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2098 .rpc_call_done = nfs4_close_done,
2099 .rpc_release = nfs4_free_closedata,
2100};
2101
1da177e4
LT		 2102/*
2103 * It is possible for data to be read/written from a mem-mapped file
2104 * after the sys_close call (which hits the vfs layer as a flush).
2105 * This means that we can't safely call nfsv4 close on a file until
2106 * the inode is cleared. This in turn means that we are not good
2107 * NFSv4 citizens - we do not indicate to the server to update the file's
2108 * share state even when we are done with one of the three share
2109 * stateid's in the inode.
2110 *
2111 * NOTE: Caller must be holding the sp->so_owner semaphore!
2112 */
643168c2 2113int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2114{
4a35bd41 2115 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2116 struct nfs4_closedata *calldata;
b39e625b
TM		 2117 struct nfs4_state_owner *sp = state->owner;
2118 struct rpc_task *task;
5138fde0
TM		 2119 struct rpc_message msg = {
2120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2121 .rpc_cred = state->owner->so_cred,
2122 };
c970aa85
TM		 2123 struct rpc_task_setup task_setup_data = {
2124 .rpc_client = server->client,
5138fde0 2125 .rpc_message = &msg,
c970aa85 2126 .callback_ops = &nfs4_close_ops,
101070ca 2127 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2128 .flags = RPC_TASK_ASYNC,
2129 };
9512135d 2130 int status = -ENOMEM;
1da177e4 2131
8535b2be 2132 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2133 if (calldata == NULL)
9512135d 2134 goto out;
9d12b216 2135 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2136 calldata->inode = state->inode;
1da177e4 2137 calldata->state = state;
4a35bd41 2138 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2139 calldata->arg.stateid = &state->open_stateid;
1da177e4 2140 /* Serialization for the sequence id */
8535b2be 2141 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2142 if (calldata->arg.seqid == NULL)
2143 goto out_free_calldata;
dc0b027d 2144 calldata->arg.fmode = 0;
a65318bf 2145 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2146 calldata->res.fattr = &calldata->fattr;
c1d51931 2147 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2148 calldata->res.server = server;
f7e8917a 2149 calldata->roc = roc;
643168c2 2150 nfs_sb_active(calldata->inode->i_sb);
9512135d 2151
1174dd1f
TM		 2152 msg.rpc_argp = &calldata->arg;
2153 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2154 task_setup_data.callback_data = calldata;
2155 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2156 if (IS_ERR(task))
2157 return PTR_ERR(task);
a49c3c77
TM		 2158 status = 0;
2159 if (wait)
2160 status = rpc_wait_for_completion_task(task);
b39e625b 2161 rpc_put_task(task);
a49c3c77 2162 return status;
9512135d
TM		 2163out_free_calldata:
2164 kfree(calldata);
2165out:
f7e8917a
FI		 2166 if (roc)
2167 pnfs_roc_release(state->inode);
b39e625b
TM		 2168 nfs4_put_open_state(state);
2169 nfs4_put_state_owner(sp);
9512135d 2170 return status;
1da177e4
LT		 2171}
2172
2b484297 2173static struct inode *
cd9a1c0e 2174nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2175{
1da177e4 2176 struct nfs4_state *state;
1da177e4 2177
565277f6 2178 /* Protect against concurrent sillydeletes */
3d4ff43d 2179 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2180 if (IS_ERR(state))
2181 return ERR_CAST(state);
cd9a1c0e 2182 ctx->state = state;
f46e0bd3 2183 return igrab(state->inode);
1da177e4
LT		 2184}
2185
1185a552 2186static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2187{
2188 if (ctx->state == NULL)
2189 return;
2190 if (is_sync)
643168c2 2191 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2192 else
643168c2 2193 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2194}
1da177e4
LT		 2195
2196static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2197{
43652ad5
BH		 2198 struct nfs4_server_caps_arg args = {
2199 .fhandle = fhandle,
2200 };
1da177e4
LT		 2201 struct nfs4_server_caps_res res = {};
2202 struct rpc_message msg = {
2203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2204 .rpc_argp = &args,
1da177e4
LT		 2205 .rpc_resp = &res,
2206 };
2207 int status;
2208
7c513058 2209 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2210 if (status == 0) {
2211 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2212 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2213 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2214 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2215 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2216 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2217 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2218 server->caps |= NFS_CAP_ACLS;
2219 if (res.has_links != 0)
2220 server->caps |= NFS_CAP_HARDLINKS;
2221 if (res.has_symlinks != 0)
2222 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2223 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2224 server->caps |= NFS_CAP_FILEID;
2225 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2226 server->caps |= NFS_CAP_MODE;
2227 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2228 server->caps |= NFS_CAP_NLINK;
2229 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2230 server->caps |= NFS_CAP_OWNER;
2231 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2232 server->caps |= NFS_CAP_OWNER_GROUP;
2233 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2234 server->caps |= NFS_CAP_ATIME;
2235 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2236 server->caps |= NFS_CAP_CTIME;
2237 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2238 server->caps |= NFS_CAP_MTIME;
2239
a65318bf
TM		 2240 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2241 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2242 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2243 server->acl_bitmask = res.acl_bitmask;
264e6351 2244 server->fh_expire_type = res.fh_expire_type;
1da177e4 2245 }
cccef3b9 2246
1da177e4
LT		 2247 return status;
2248}
2249
55a97593 2250int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2251{
2252 struct nfs4_exception exception = { };
2253 int err;
2254 do {
2255 err = nfs4_handle_exception(server,
2256 _nfs4_server_capabilities(server, fhandle),
2257 &exception);
2258 } while (exception.retry);
2259 return err;
2260}
2261
2262static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2263 struct nfs_fsinfo *info)
2264{
1da177e4
LT		 2265 struct nfs4_lookup_root_arg args = {
2266 .bitmask = nfs4_fattr_bitmap,
2267 };
2268 struct nfs4_lookup_res res = {
2269 .server = server,
0e574af1 2270 .fattr = info->fattr,
1da177e4
LT		 2271 .fh = fhandle,
2272 };
2273 struct rpc_message msg = {
2274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2275 .rpc_argp = &args,
2276 .rpc_resp = &res,
2277 };
008f55d0 2278
0e574af1 2279 nfs_fattr_init(info->fattr);
7c513058 2280 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2281}
2282
2283static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *info)
2285{
2286 struct nfs4_exception exception = { };
2287 int err;
2288 do {
fb8a5ba8
BS		 2289 err = _nfs4_lookup_root(server, fhandle, info);
2290 switch (err) {
2291 case 0:
2292 case -NFS4ERR_WRONGSEC:
2293 break;
2294 default:
2295 err = nfs4_handle_exception(server, err, &exception);
2296 }
1da177e4
LT		 2297 } while (exception.retry);
2298 return err;
2299}
2300
8f70e95f
BS		 2301static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2302 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2303{
2304 struct rpc_auth *auth;
2305 int ret;
2306
2307 auth = rpcauth_create(flavor, server->client);
2308 if (!auth) {
2309 ret = -EIO;
2310 goto out;
2311 }
2312 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2313out:
2314 return ret;
2315}
2316
801a16dc 2317static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2318 struct nfs_fsinfo *info)
1da177e4 2319{
8f70e95f 2320 int i, len, status = 0;
0fabee24 2321 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2322
801a16dc
BS		 2323 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2324 flav_array[len] = RPC_AUTH_NULL;
2325 len += 1;
8f70e95f
BS		 2326
2327 for (i = 0; i < len; i++) {
2328 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2329 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2330 continue;
2331 break;
8f70e95f 2332 }
fb8a5ba8
BS		 2333 /*
2334 * -EACCESS could mean that the user doesn't have correct permissions
2335 * to access the mount. It could also mean that we tried to mount
2336 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2337 * existing mount programs don't handle -EACCES very well so it should
2338 * be mapped to -EPERM instead.
2339 */
2340 if (status == -EACCES)
2341 status = -EPERM;
801a16dc
BS		 2342 return status;
2343}
2344
2345/*
2346 * get the file handle for the "/" directory on the server
2347 */
2348static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *info)
2350{
fca78d6d 2351 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2352 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2353 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2354 /*
2355 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2356 * by nfs4_map_errors() as this function exits.
2357 */
fca78d6d 2358 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2359 if (status == 0)
2360 status = nfs4_server_capabilities(server, fhandle);
2361 if (status == 0)
2362 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2363 return nfs4_map_errors(status);
1da177e4
LT		 2364}
2365
6b97fd3d
MN		 2366/*
2367 * Get locations and (maybe) other attributes of a referral.
2368 * Note that we'll actually follow the referral later when
2369 * we detect fsid mismatch in inode revalidation
2370 */
533eb461
AA		 2371static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2372 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2373{
2374 int status = -ENOMEM;
2375 struct page *page = NULL;
2376 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2377
2378 page = alloc_page(GFP_KERNEL);
2379 if (page == NULL)
2380 goto out;
2381 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2382 if (locations == NULL)
2383 goto out;
2384
c228fd3a 2385 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2386 if (status != 0)
2387 goto out;
2388 /* Make sure server returned a different fsid for the referral */
2389 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2390 dprintk("%s: server did not return a different fsid for"
2391 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2392 status = -EIO;
2393 goto out;
2394 }
533eb461
AA		 2395 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2396 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2397
533eb461 2398 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2399 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2400 memset(fhandle, 0, sizeof(struct nfs_fh));
2401out:
2402 if (page)
2403 __free_page(page);
5d7ca35a 2404 kfree(locations);
6b97fd3d
MN		 2405 return status;
2406}
2407
1da177e4
LT		 2408static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2409{
2410 struct nfs4_getattr_arg args = {
2411 .fh = fhandle,
2412 .bitmask = server->attr_bitmask,
2413 };
2414 struct nfs4_getattr_res res = {
2415 .fattr = fattr,
2416 .server = server,
2417 };
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2420 .rpc_argp = &args,
2421 .rpc_resp = &res,
2422 };
2423
0e574af1 2424 nfs_fattr_init(fattr);
7c513058 2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2426}
2427
2428static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2429{
2430 struct nfs4_exception exception = { };
2431 int err;
2432 do {
2433 err = nfs4_handle_exception(server,
2434 _nfs4_proc_getattr(server, fhandle, fattr),
2435 &exception);
2436 } while (exception.retry);
2437 return err;
2438}
2439
2440/*
2441 * The file is not closed if it is opened due to the a request to change
2442 * the size of the file. The open call will not be needed once the
2443 * VFS layer lookup-intents are implemented.
2444 *
2445 * Close is called when the inode is destroyed.
2446 * If we haven't opened the file for O_WRONLY, we
2447 * need to in the size_change case to obtain a stateid.
2448 *
2449 * Got race?
2450 * Because OPEN is always done by name in nfsv4, it is
2451 * possible that we opened a different file by the same
2452 * name. We can recognize this race condition, but we
2453 * can't do anything about it besides returning an error.
2454 *
2455 * This will be fixed with VFS changes (lookup-intent).
2456 */
2457static int
2458nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2459 struct iattr *sattr)
2460{
08e9eac4 2461 struct inode *inode = dentry->d_inode;
659bfcd6 2462 struct rpc_cred *cred = NULL;
d530838b 2463 struct nfs4_state *state = NULL;
1da177e4
LT		 2464 int status;
2465
8a1636c4
BH		 2466 if (pnfs_ld_layoutret_on_setattr(inode))
2467 pnfs_return_layout(inode);
2468
0e574af1 2469 nfs_fattr_init(fattr);
1da177e4 2470
d530838b 2471 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2472 if (sattr->ia_valid & ATTR_FILE) {
2473 struct nfs_open_context *ctx;
2474
2475 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2476 if (ctx) {
2477 cred = ctx->cred;
2478 state = ctx->state;
2479 }
659bfcd6 2480 }
08e9eac4 2481
536e43d1
TM		 2482 /* Deal with open(O_TRUNC) */
2483 if (sattr->ia_valid & ATTR_OPEN)
2484 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2485
659bfcd6 2486 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2487 if (status == 0)
2488 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2489 return status;
2490}
2491
0c2e53f1
TM		 2492static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2493 const struct qstr *name, struct nfs_fh *fhandle,
2494 struct nfs_fattr *fattr)
2b3de441 2495{
0c2e53f1 2496 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2497 int status;
2498 struct nfs4_lookup_arg args = {
2499 .bitmask = server->attr_bitmask,
0c2e53f1 2500 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2501 .name = name,
2502 };
2503 struct nfs4_lookup_res res = {
2504 .server = server,
2505 .fattr = fattr,
2506 .fh = fhandle,
2507 };
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2510 .rpc_argp = &args,
2511 .rpc_resp = &res,
2512 };
2513
2514 nfs_fattr_init(fattr);
2515
1da177e4 2516 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2517 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2518 dprintk("NFS reply lookup: %d\n", status);
2519 return status;
2520}
2521
7ebb9315
BS		 2522void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2523{
2524 memset(fh, 0, sizeof(struct nfs_fh));
2525 fattr->fsid.major = 1;
2526 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2527 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2528 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2529 fattr->nlink = 2;
2530}
2531
7c513058
BS		 2532static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2533 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
0c2e53f1
TM		 2538 int status;
2539
2540 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2541 switch (status) {
08ef7bd3
TM		 2542 case -NFS4ERR_BADNAME:
2543 return -ENOENT;
0c2e53f1 2544 case -NFS4ERR_MOVED:
a6f498a8 2545 return nfs4_get_referral(dir, name, fattr, fhandle);
0c2e53f1 2546 case -NFS4ERR_WRONGSEC:
7ebb9315 2547 nfs_fixup_secinfo_attributes(fattr, fhandle);
0c2e53f1
TM		 2548 }
2549 err = nfs4_handle_exception(NFS_SERVER(dir),
2550 status, &exception);
1da177e4
LT		 2551 } while (exception.retry);
2552 return err;
2553}
2554
2555static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2556{
76b32999 2557 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2558 struct nfs4_accessargs args = {
2559 .fh = NFS_FH(inode),
a4980e78 2560 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2561 };
2562 struct nfs4_accessres res = {
2563 .server = server,
1da177e4 2564 };
1da177e4
LT		 2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2567 .rpc_argp = &args,
2568 .rpc_resp = &res,
2569 .rpc_cred = entry->cred,
2570 };
2571 int mode = entry->mask;
2572 int status;
2573
2574 /*
2575 * Determine which access bits we want to ask for...
2576 */
2577 if (mode & MAY_READ)
2578 args.access |= NFS4_ACCESS_READ;
2579 if (S_ISDIR(inode->i_mode)) {
2580 if (mode & MAY_WRITE)
2581 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2582 if (mode & MAY_EXEC)
2583 args.access |= NFS4_ACCESS_LOOKUP;
2584 } else {
2585 if (mode & MAY_WRITE)
2586 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2587 if (mode & MAY_EXEC)
2588 args.access |= NFS4_ACCESS_EXECUTE;
2589 }
c407d41a
TM		 2590
2591 res.fattr = nfs_alloc_fattr();
2592 if (res.fattr == NULL)
2593 return -ENOMEM;
2594
7c513058 2595 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2596 if (!status) {
2597 entry->mask = 0;
2598 if (res.access & NFS4_ACCESS_READ)
2599 entry->mask |= MAY_READ;
2600 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2601 entry->mask |= MAY_WRITE;
2602 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2603 entry->mask |= MAY_EXEC;
c407d41a 2604 nfs_refresh_inode(inode, res.fattr);
1da177e4 2605 }
c407d41a 2606 nfs_free_fattr(res.fattr);
1da177e4
LT		 2607 return status;
2608}
2609
2610static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2611{
2612 struct nfs4_exception exception = { };
2613 int err;
2614 do {
2615 err = nfs4_handle_exception(NFS_SERVER(inode),
2616 _nfs4_proc_access(inode, entry),
2617 &exception);
2618 } while (exception.retry);
2619 return err;
2620}
2621
2622/*
2623 * TODO: For the time being, we don't try to get any attributes
2624 * along with any of the zero-copy operations READ, READDIR,
2625 * READLINK, WRITE.
2626 *
2627 * In the case of the first three, we want to put the GETATTR
2628 * after the read-type operation -- this is because it is hard
2629 * to predict the length of a GETATTR response in v4, and thus
2630 * align the READ data correctly. This means that the GETATTR
2631 * may end up partially falling into the page cache, and we should
2632 * shift it into the 'tail' of the xdr_buf before processing.
2633 * To do this efficiently, we need to know the total length
2634 * of data received, which doesn't seem to be available outside
2635 * of the RPC layer.
2636 *
2637 * In the case of WRITE, we also want to put the GETATTR after
2638 * the operation -- in this case because we want to make sure
2639 * we get the post-operation mtime and size. This means that
2640 * we can't use xdr_encode_pages() as written: we need a variant
2641 * of it which would leave room in the 'tail' iovec.
2642 *
2643 * Both of these changes to the XDR layer would in fact be quite
2644 * minor, but I decided to leave them for a subsequent patch.
2645 */
2646static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2647 unsigned int pgbase, unsigned int pglen)
2648{
2649 struct nfs4_readlink args = {
2650 .fh = NFS_FH(inode),
2651 .pgbase = pgbase,
2652 .pglen = pglen,
2653 .pages = &page,
2654 };
f50c7000 2655 struct nfs4_readlink_res res;
1da177e4
LT		 2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2658 .rpc_argp = &args,
f50c7000 2659 .rpc_resp = &res,
1da177e4
LT		 2660 };
2661
7c513058 2662 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2663}
2664
2665static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2666 unsigned int pgbase, unsigned int pglen)
2667{
2668 struct nfs4_exception exception = { };
2669 int err;
2670 do {
2671 err = nfs4_handle_exception(NFS_SERVER(inode),
2672 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2673 &exception);
2674 } while (exception.retry);
2675 return err;
2676}
2677
1da177e4
LT		 2678/*
2679 * Got race?
2680 * We will need to arrange for the VFS layer to provide an atomic open.
2681 * Until then, this create/open method is prone to inefficiency and race
2682 * conditions due to the lookup, create, and open VFS calls from sys_open()
2683 * placed on the wire.
2684 *
2685 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2686 * The file will be opened again in the subsequent VFS open call
2687 * (nfs4_proc_file_open).
2688 *
2689 * The open for read will just hang around to be used by any process that
2690 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2691 */
2692
2693static int
2694nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2695 int flags, struct nfs_open_context *ctx)
1da177e4 2696{
82a2c1b7 2697 struct dentry *de = dentry;
1da177e4 2698 struct nfs4_state *state;
c0204fd2
TM		 2699 struct rpc_cred *cred = NULL;
2700 fmode_t fmode = 0;
1da177e4
LT		 2701 int status = 0;
2702
c0204fd2
TM		 2703 if (ctx != NULL) {
2704 cred = ctx->cred;
3d4ff43d 2705 de = ctx->dentry;
c0204fd2 2706 fmode = ctx->mode;
1da177e4 2707 }
a8a5da99 2708 sattr->ia_mode &= ~current_umask();
82a2c1b7 2709 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2710 d_drop(dentry);
1da177e4
LT		 2711 if (IS_ERR(state)) {
2712 status = PTR_ERR(state);
c0204fd2 2713 goto out;
1da177e4 2714 }
d4d9cdcb 2715 d_add(dentry, igrab(state->inode));
d75340cc 2716 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2717 if (ctx != NULL)
2718 ctx->state = state;
02a913a7 2719 else
643168c2 2720 nfs4_close_sync(state, fmode);
1da177e4
LT		 2721out:
2722 return status;
2723}
2724
2725static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2726{
16e42959 2727 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2728 struct nfs_removeargs args = {
1da177e4 2729 .fh = NFS_FH(dir),
4fdc17b2
TM		 2730 .name.len = name->len,
2731 .name.name = name->name,
16e42959
TM		 2732 .bitmask = server->attr_bitmask,
2733 };
4fdc17b2 2734 struct nfs_removeres res = {
16e42959 2735 .server = server,
1da177e4 2736 };
1da177e4 2737 struct rpc_message msg = {
4fdc17b2
TM		 2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2739 .rpc_argp = &args,
2740 .rpc_resp = &res,
1da177e4 2741 };
d346890b
TM		 2742 int status = -ENOMEM;
2743
2744 res.dir_attr = nfs_alloc_fattr();
2745 if (res.dir_attr == NULL)
2746 goto out;
1da177e4 2747
7c513058 2748 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2749 if (status == 0) {
2750 update_changeattr(dir, &res.cinfo);
d346890b 2751 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2752 }
d346890b
TM		 2753 nfs_free_fattr(res.dir_attr);
2754out:
1da177e4
LT		 2755 return status;
2756}
2757
2758static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(NFS_SERVER(dir),
2764 _nfs4_proc_remove(dir, name),
2765 &exception);
2766 } while (exception.retry);
2767 return err;
2768}
2769
e4eff1a6 2770static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2771{
e4eff1a6
TM		 2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs_removeargs *args = msg->rpc_argp;
2774 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2775
a65318bf 2776 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2777 res->server = server;
1da177e4 2778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2779 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2780}
2781
34e137cc
BS		 2782static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2783{
2784 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2785 &data->args.seq_args,
2786 &data->res.seq_res,
2787 task))
2788 return;
2789 rpc_call_start(task);
2790}
2791
e4eff1a6 2792static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2793{
e4eff1a6
TM		 2794 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2795
14516c3a
TM		 2796 if (!nfs4_sequence_done(task, &res->seq_res))
2797 return 0;
9e33bed5 2798 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2799 return 0;
2800 update_changeattr(dir, &res->cinfo);
d346890b 2801 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2802 return 1;
1da177e4
LT		 2803}
2804
d3d4152a
JL		 2805static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2806{
2807 struct nfs_server *server = NFS_SERVER(dir);
2808 struct nfs_renameargs *arg = msg->rpc_argp;
2809 struct nfs_renameres *res = msg->rpc_resp;
2810
2811 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2812 arg->bitmask = server->attr_bitmask;
2813 res->server = server;
9d12b216 2814 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2815}
2816
2817static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2818 struct inode *new_dir)
2819{
2820 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2821
2822 if (!nfs4_sequence_done(task, &res->seq_res))
2823 return 0;
2824 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2825 return 0;
2826
2827 update_changeattr(old_dir, &res->old_cinfo);
2828 nfs_post_op_update_inode(old_dir, res->old_fattr);
2829 update_changeattr(new_dir, &res->new_cinfo);
2830 nfs_post_op_update_inode(new_dir, res->new_fattr);
2831 return 1;
2832}
2833
1da177e4
LT		 2834static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2835 struct inode *new_dir, struct qstr *new_name)
2836{
6caf2c82 2837 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2838 struct nfs_renameargs arg = {
1da177e4
LT		 2839 .old_dir = NFS_FH(old_dir),
2840 .new_dir = NFS_FH(new_dir),
2841 .old_name = old_name,
2842 .new_name = new_name,
6caf2c82
TM		 2843 .bitmask = server->attr_bitmask,
2844 };
e8582a8b 2845 struct nfs_renameres res = {
6caf2c82 2846 .server = server,
1da177e4 2847 };
1da177e4
LT		 2848 struct rpc_message msg = {
2849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2850 .rpc_argp = &arg,
2851 .rpc_resp = &res,
2852 };
011fff72 2853 int status = -ENOMEM;
1da177e4 2854
011fff72
TM		 2855 res.old_fattr = nfs_alloc_fattr();
2856 res.new_fattr = nfs_alloc_fattr();
2857 if (res.old_fattr == NULL || res.new_fattr == NULL)
2858 goto out;
1da177e4 2859
7c513058 2860 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2861 if (!status) {
2862 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2863 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2864 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2865 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2866 }
011fff72
TM		 2867out:
2868 nfs_free_fattr(res.new_fattr);
2869 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2870 return status;
2871}
2872
2873static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2874 struct inode *new_dir, struct qstr *new_name)
2875{
2876 struct nfs4_exception exception = { };
2877 int err;
2878 do {
2879 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2880 _nfs4_proc_rename(old_dir, old_name,
2881 new_dir, new_name),
2882 &exception);
2883 } while (exception.retry);
2884 return err;
2885}
2886
2887static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2888{
91ba2eee 2889 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2890 struct nfs4_link_arg arg = {
2891 .fh = NFS_FH(inode),
2892 .dir_fh = NFS_FH(dir),
2893 .name = name,
91ba2eee
TM		 2894 .bitmask = server->attr_bitmask,
2895 };
91ba2eee
TM		 2896 struct nfs4_link_res res = {
2897 .server = server,
1da177e4 2898 };
1da177e4
LT		 2899 struct rpc_message msg = {
2900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2901 .rpc_argp = &arg,
91ba2eee 2902 .rpc_resp = &res,
1da177e4 2903 };
136f2627
TM		 2904 int status = -ENOMEM;
2905
2906 res.fattr = nfs_alloc_fattr();
2907 res.dir_attr = nfs_alloc_fattr();
2908 if (res.fattr == NULL || res.dir_attr == NULL)
2909 goto out;
1da177e4 2910
7c513058 2911 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2912 if (!status) {
2913 update_changeattr(dir, &res.cinfo);
2914 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2915 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2916 }
136f2627
TM		 2917out:
2918 nfs_free_fattr(res.dir_attr);
2919 nfs_free_fattr(res.fattr);
1da177e4
LT		 2920 return status;
2921}
2922
2923static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2924{
2925 struct nfs4_exception exception = { };
2926 int err;
2927 do {
2928 err = nfs4_handle_exception(NFS_SERVER(inode),
2929 _nfs4_proc_link(inode, dir, name),
2930 &exception);
2931 } while (exception.retry);
2932 return err;
2933}
2934
57dc9a57
TM		 2935struct nfs4_createdata {
2936 struct rpc_message msg;
2937 struct nfs4_create_arg arg;
2938 struct nfs4_create_res res;
2939 struct nfs_fh fh;
2940 struct nfs_fattr fattr;
2941 struct nfs_fattr dir_fattr;
2942};
2943
2944static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2945 struct qstr *name, struct iattr *sattr, u32 ftype)
2946{
2947 struct nfs4_createdata *data;
2948
2949 data = kzalloc(sizeof(*data), GFP_KERNEL);
2950 if (data != NULL) {
2951 struct nfs_server *server = NFS_SERVER(dir);
2952
2953 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2954 data->msg.rpc_argp = &data->arg;
2955 data->msg.rpc_resp = &data->res;
2956 data->arg.dir_fh = NFS_FH(dir);
2957 data->arg.server = server;
2958 data->arg.name = name;
2959 data->arg.attrs = sattr;
2960 data->arg.ftype = ftype;
2961 data->arg.bitmask = server->attr_bitmask;
2962 data->res.server = server;
2963 data->res.fh = &data->fh;
2964 data->res.fattr = &data->fattr;
2965 data->res.dir_fattr = &data->dir_fattr;
2966 nfs_fattr_init(data->res.fattr);
2967 nfs_fattr_init(data->res.dir_fattr);
2968 }
2969 return data;
2970}
2971
2972static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2973{
7c513058 2974 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2975 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2976 if (status == 0) {
2977 update_changeattr(dir, &data->res.dir_cinfo);
2978 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2979 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2980 }
2981 return status;
2982}
2983
2984static void nfs4_free_createdata(struct nfs4_createdata *data)
2985{
2986 kfree(data);
2987}
2988
4f390c15 2989static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2990 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2991{
57dc9a57
TM		 2992 struct nfs4_createdata *data;
2993 int status = -ENAMETOOLONG;
1da177e4 2994
94a6d753 2995 if (len > NFS4_MAXPATHLEN)
57dc9a57 2996 goto out;
4f390c15 2997
57dc9a57
TM		 2998 status = -ENOMEM;
2999 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3000 if (data == NULL)
3001 goto out;
3002
3003 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3004 data->arg.u.symlink.pages = &page;
3005 data->arg.u.symlink.len = len;
1da177e4 3006
57dc9a57
TM		 3007 status = nfs4_do_create(dir, dentry, data);
3008
3009 nfs4_free_createdata(data);
3010out:
1da177e4
LT		 3011 return status;
3012}
3013
4f390c15 3014static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3015 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3016{
3017 struct nfs4_exception exception = { };
3018 int err;
3019 do {
3020 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3021 _nfs4_proc_symlink(dir, dentry, page,
3022 len, sattr),
1da177e4
LT		 3023 &exception);
3024 } while (exception.retry);
3025 return err;
3026}
3027
3028static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3029 struct iattr *sattr)
3030{
57dc9a57
TM		 3031 struct nfs4_createdata *data;
3032 int status = -ENOMEM;
1da177e4 3033
57dc9a57
TM		 3034 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3035 if (data == NULL)
3036 goto out;
3037
3038 status = nfs4_do_create(dir, dentry, data);
3039
3040 nfs4_free_createdata(data);
3041out:
1da177e4
LT		 3042 return status;
3043}
3044
3045static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3046 struct iattr *sattr)
3047{
3048 struct nfs4_exception exception = { };
3049 int err;
a8a5da99
AK		 3050
3051 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3052 do {
3053 err = nfs4_handle_exception(NFS_SERVER(dir),
3054 _nfs4_proc_mkdir(dir, dentry, sattr),
3055 &exception);
3056 } while (exception.retry);
3057 return err;
3058}
3059
3060static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3061 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3062{
3063 struct inode *dir = dentry->d_inode;
3064 struct nfs4_readdir_arg args = {
3065 .fh = NFS_FH(dir),
56e4ebf8 3066 .pages = pages,
1da177e4
LT		 3067 .pgbase = 0,
3068 .count = count,
96d25e53 3069 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3070 .plus = plus,
1da177e4
LT		 3071 };
3072 struct nfs4_readdir_res res;
3073 struct rpc_message msg = {
3074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3075 .rpc_argp = &args,
3076 .rpc_resp = &res,
3077 .rpc_cred = cred,
3078 };
3079 int status;
3080
3110ff80 3081 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3082 dentry->d_parent->d_name.name,
3083 dentry->d_name.name,
3084 (unsigned long long)cookie);
1da177e4
LT		 3085 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3086 res.pgbase = args.pgbase;
7c513058 3087 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3088 if (status >= 0) {
1da177e4 3089 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3090 status += args.pgbase;
3091 }
c4812998
TM		 3092
3093 nfs_invalidate_atime(dir);
3094
3110ff80 3095 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3096 return status;
3097}
3098
3099static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3100 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3101{
3102 struct nfs4_exception exception = { };
3103 int err;
3104 do {
3105 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3106 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3107 pages, count, plus),
1da177e4
LT		 3108 &exception);
3109 } while (exception.retry);
3110 return err;
3111}
3112
3113static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3114 struct iattr *sattr, dev_t rdev)
3115{
57dc9a57
TM		 3116 struct nfs4_createdata *data;
3117 int mode = sattr->ia_mode;
3118 int status = -ENOMEM;
1da177e4
LT		 3119
3120 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3121 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3122
3123 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3124 if (data == NULL)
3125 goto out;
3126
1da177e4 3127 if (S_ISFIFO(mode))
57dc9a57 3128 data->arg.ftype = NF4FIFO;
1da177e4 3129 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3130 data->arg.ftype = NF4BLK;
3131 data->arg.u.device.specdata1 = MAJOR(rdev);
3132 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3133 }
3134 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3135 data->arg.ftype = NF4CHR;
3136 data->arg.u.device.specdata1 = MAJOR(rdev);
3137 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3138 }
1da177e4 3139
57dc9a57
TM		 3140 status = nfs4_do_create(dir, dentry, data);
3141
3142 nfs4_free_createdata(data);
3143out:
1da177e4
LT		 3144 return status;
3145}
3146
3147static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3148 struct iattr *sattr, dev_t rdev)
3149{
3150 struct nfs4_exception exception = { };
3151 int err;
a8a5da99
AK		 3152
3153 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3154 do {
3155 err = nfs4_handle_exception(NFS_SERVER(dir),
3156 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3157 &exception);
3158 } while (exception.retry);
3159 return err;
3160}
3161
3162static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3163 struct nfs_fsstat *fsstat)
3164{
3165 struct nfs4_statfs_arg args = {
3166 .fh = fhandle,
3167 .bitmask = server->attr_bitmask,
3168 };
24ad148a
BH		 3169 struct nfs4_statfs_res res = {
3170 .fsstat = fsstat,
3171 };
1da177e4
LT		 3172 struct rpc_message msg = {
3173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3174 .rpc_argp = &args,
24ad148a 3175 .rpc_resp = &res,
1da177e4
LT		 3176 };
3177
0e574af1 3178 nfs_fattr_init(fsstat->fattr);
7c513058 3179 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3180}
3181
3182static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3183{
3184 struct nfs4_exception exception = { };
3185 int err;
3186 do {
3187 err = nfs4_handle_exception(server,
3188 _nfs4_proc_statfs(server, fhandle, fsstat),
3189 &exception);
3190 } while (exception.retry);
3191 return err;
3192}
3193
3194static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3195 struct nfs_fsinfo *fsinfo)
3196{
3197 struct nfs4_fsinfo_arg args = {
3198 .fh = fhandle,
3199 .bitmask = server->attr_bitmask,
3200 };
3dda5e43
BH		 3201 struct nfs4_fsinfo_res res = {
3202 .fsinfo = fsinfo,
3203 };
1da177e4
LT		 3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3206 .rpc_argp = &args,
3dda5e43 3207 .rpc_resp = &res,
1da177e4
LT		 3208 };
3209
7c513058 3210 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3211}
3212
3213static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3214{
3215 struct nfs4_exception exception = { };
3216 int err;
3217
3218 do {
3219 err = nfs4_handle_exception(server,
3220 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3221 &exception);
3222 } while (exception.retry);
3223 return err;
3224}
3225
3226static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3227{
0e574af1 3228 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3229 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3230}
3231
3232static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3233 struct nfs_pathconf *pathconf)
3234{
3235 struct nfs4_pathconf_arg args = {
3236 .fh = fhandle,
3237 .bitmask = server->attr_bitmask,
3238 };
d45b2989
BH		 3239 struct nfs4_pathconf_res res = {
3240 .pathconf = pathconf,
3241 };
1da177e4
LT		 3242 struct rpc_message msg = {
3243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3244 .rpc_argp = &args,
d45b2989 3245 .rpc_resp = &res,
1da177e4
LT		 3246 };
3247
3248 /* None of the pathconf attributes are mandatory to implement */
3249 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3250 memset(pathconf, 0, sizeof(*pathconf));
3251 return 0;
3252 }
3253
0e574af1 3254 nfs_fattr_init(pathconf->fattr);
7c513058 3255 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3256}
3257
3258static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3259 struct nfs_pathconf *pathconf)
3260{
3261 struct nfs4_exception exception = { };
3262 int err;
3263
3264 do {
3265 err = nfs4_handle_exception(server,
3266 _nfs4_proc_pathconf(server, fhandle, pathconf),
3267 &exception);
3268 } while (exception.retry);
3269 return err;
3270}
3271
d20581aa
BH		 3272void __nfs4_read_done_cb(struct nfs_read_data *data)
3273{
3274 nfs_invalidate_atime(data->inode);
3275}
3276
cbdabc7f 3277static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3278{
ec06c096 3279 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3280
9e33bed5 3281 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3282 rpc_restart_call_prepare(task);
ec06c096 3283 return -EAGAIN;
1da177e4 3284 }
8850df99 3285
d20581aa 3286 __nfs4_read_done_cb(data);
1da177e4 3287 if (task->tk_status > 0)
ec06c096
TM		 3288 renew_lease(server, data->timestamp);
3289 return 0;
1da177e4
LT		 3290}
3291
cbdabc7f
AA		 3292static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3293{
3294
3295 dprintk("--> %s\n", __func__);
3296
3297 if (!nfs4_sequence_done(task, &data->res.seq_res))
3298 return -EAGAIN;
3299
d20581aa
BH		 3300 return data->read_done_cb ? data->read_done_cb(task, data) :
3301 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3302}
3303
bdc7f021 3304static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3305{
1da177e4 3306 data->timestamp = jiffies;
cbdabc7f 3307 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3308 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3309 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3310}
3311
ea7c3303
BS		 3312static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3313{
3314 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3315 &data->args.seq_args,
3316 &data->res.seq_res,
3317 task))
3318 return;
3319 rpc_call_start(task);
3320}
3321
cbdabc7f
AA		 3322/* Reset the the nfs_read_data to send the read to the MDS. */
3323void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3324{
3325 dprintk("%s Reset task for i/o through\n", __func__);
3326 put_lseg(data->lseg);
3327 data->lseg = NULL;
3328 /* offsets will differ in the dense stripe case */
3329 data->args.offset = data->mds_offset;
3330 data->ds_clp = NULL;
3331 data->args.fh = NFS_FH(data->inode);
3332 data->read_done_cb = nfs4_read_done_cb;
3333 task->tk_ops = data->mds_ops;
3334 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3335}
3336EXPORT_SYMBOL_GPL(nfs4_reset_read);
3337
b029bc9b 3338static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3339{
1da177e4
LT		 3340 struct inode *inode = data->inode;
3341
9e33bed5 3342 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3343 rpc_restart_call_prepare(task);
788e7a89 3344 return -EAGAIN;
1da177e4 3345 }
4f9838c7 3346 if (task->tk_status >= 0) {
1da177e4 3347 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3348 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3349 }
788e7a89 3350 return 0;
1da177e4
LT		 3351}
3352
b029bc9b
FI		 3353static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3354{
3355 if (!nfs4_sequence_done(task, &data->res.seq_res))
3356 return -EAGAIN;
d20581aa
BH		 3357 return data->write_done_cb ? data->write_done_cb(task, data) :
3358 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3359}
3360
a69aef14
FI		 3361/* Reset the the nfs_write_data to send the write to the MDS. */
3362void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3363{
3364 dprintk("%s Reset task for i/o through\n", __func__);
3365 put_lseg(data->lseg);
3366 data->lseg = NULL;
3367 data->ds_clp = NULL;
3368 data->write_done_cb = nfs4_write_done_cb;
3369 data->args.fh = NFS_FH(data->inode);
3370 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3371 data->args.offset = data->mds_offset;
3372 data->res.fattr = &data->fattr;
3373 task->tk_ops = data->mds_ops;
3374 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3375}
3376EXPORT_SYMBOL_GPL(nfs4_reset_write);
3377
bdc7f021 3378static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3379{
bdc7f021
TM		 3380 struct nfs_server *server = NFS_SERVER(data->inode);
3381
7ffd1064
FI		 3382 if (data->lseg) {
3383 data->args.bitmask = NULL;
3384 data->res.fattr = NULL;
3385 } else
3386 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3387 if (!data->write_done_cb)
3388 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3389 data->res.server = server;
1da177e4
LT		 3390 data->timestamp = jiffies;
3391
bdc7f021 3392 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3393 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3394}
3395
c6cb80d0
BS		 3396static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3397{
3398 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3399 &data->args.seq_args,
3400 &data->res.seq_res,
3401 task))
3402 return;
3403 rpc_call_start(task);
3404}
3405
5f452431 3406static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3407{
1da177e4 3408 struct inode *inode = data->inode;
14516c3a 3409
9e33bed5 3410 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3411 rpc_restart_call_prepare(task);
788e7a89 3412 return -EAGAIN;
1da177e4 3413 }
9e08a3c5 3414 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3415 return 0;
1da177e4
LT		 3416}
3417
5f452431
FI		 3418static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3419{
3420 if (!nfs4_sequence_done(task, &data->res.seq_res))
3421 return -EAGAIN;
3422 return data->write_done_cb(task, data);
3423}
3424
bdc7f021 3425static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3426{
788e7a89 3427 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3428
3429 if (data->lseg) {
3430 data->args.bitmask = NULL;
3431 data->res.fattr = NULL;
3432 } else
3433 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3434 if (!data->write_done_cb)
3435 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3436 data->res.server = server;
bdc7f021 3437 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3438 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3439}
3440
9bc4e3ca
CL		 3441struct nfs4_renewdata {
3442 struct nfs_client *client;
3443 unsigned long timestamp;
3444};
3445
1da177e4
LT		 3446/*
3447 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3448 * standalone procedure for queueing an asynchronous RENEW.
3449 */
9bc4e3ca 3450static void nfs4_renew_release(void *calldata)
dc96aef9 3451{
9bc4e3ca
CL		 3452 struct nfs4_renewdata *data = calldata;
3453 struct nfs_client *clp = data->client;
dc96aef9 3454
0851de06
AB		 3455 if (atomic_read(&clp->cl_count) > 1)
3456 nfs4_schedule_state_renewal(clp);
3457 nfs_put_client(clp);
9bc4e3ca 3458 kfree(data);
dc96aef9
AB		 3459}
3460
9bc4e3ca 3461static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3462{
9bc4e3ca
CL		 3463 struct nfs4_renewdata *data = calldata;
3464 struct nfs_client *clp = data->client;
3465 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3466
3467 if (task->tk_status < 0) {
95baa25c 3468 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3469 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3470 return;
3471 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3472 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3473 return;
3474 }
3475 nfs4_schedule_path_down_recovery(clp);
1da177e4 3476 }
452e9352 3477 do_renew_lease(clp, timestamp);
1da177e4
LT		 3478}
3479
963d8fe5
TM		 3480static const struct rpc_call_ops nfs4_renew_ops = {
3481 .rpc_call_done = nfs4_renew_done,
dc96aef9 3482 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3483};
3484
2f60ea6b 3485static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3486{
3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3489 .rpc_argp = clp,
b4454fe1 3490 .rpc_cred = cred,
1da177e4 3491 };
9bc4e3ca 3492 struct nfs4_renewdata *data;
1da177e4 3493
2f60ea6b
TM		 3494 if (renew_flags == 0)
3495 return 0;
0851de06
AB		 3496 if (!atomic_inc_not_zero(&clp->cl_count))
3497 return -EIO;
b569ad34 3498 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3499 if (data == NULL)
3500 return -ENOMEM;
3501 data->client = clp;
3502 data->timestamp = jiffies;
1da177e4 3503 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3504 &nfs4_renew_ops, data);
1da177e4
LT		 3505}
3506
8534d4ec 3507static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3508{
3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3511 .rpc_argp = clp,
b4454fe1 3512 .rpc_cred = cred,
1da177e4
LT		 3513 };
3514 unsigned long now = jiffies;
3515 int status;
3516
3517 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3518 if (status < 0)
3519 return status;
452e9352 3520 do_renew_lease(clp, now);
1da177e4
LT		 3521 return 0;
3522}
3523
aa1870af
BF		 3524static inline int nfs4_server_supports_acls(struct nfs_server *server)
3525{
3526 return (server->caps & NFS_CAP_ACLS)
3527 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3528 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3529}
3530
3531/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3532 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3533 * the stack.
3534 */
3535#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3536
e9e3d724
NH		 3537static int buf_to_pages_noslab(const void *buf, size_t buflen,
3538 struct page **pages, unsigned int *pgbase)
3539{
3540 struct page *newpage, **spages;
3541 int rc = 0;
3542 size_t len;
3543 spages = pages;
3544
3545 do {
43b7c3f0 3546 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3547 newpage = alloc_page(GFP_KERNEL);
3548
3549 if (newpage == NULL)
3550 goto unwind;
3551 memcpy(page_address(newpage), buf, len);
3552 buf += len;
3553 buflen -= len;
3554 *pages++ = newpage;
3555 rc++;
3556 } while (buflen != 0);
3557
3558 return rc;
3559
3560unwind:
3561 for(; rc > 0; rc--)
3562 __free_page(spages[rc-1]);
3563 return -ENOMEM;
3564}
3565
e50a1c2e
BF		 3566struct nfs4_cached_acl {
3567 int cached;
3568 size_t len;
3e9d4154 3569 char data[0];
e50a1c2e
BF		 3570};
3571
3572static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3573{
3574 struct nfs_inode *nfsi = NFS_I(inode);
3575
3576 spin_lock(&inode->i_lock);
3577 kfree(nfsi->nfs4_acl);
3578 nfsi->nfs4_acl = acl;
3579 spin_unlock(&inode->i_lock);
3580}
3581
3582static void nfs4_zap_acl_attr(struct inode *inode)
3583{
3584 nfs4_set_cached_acl(inode, NULL);
3585}
3586
3587static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3588{
3589 struct nfs_inode *nfsi = NFS_I(inode);
3590 struct nfs4_cached_acl *acl;
3591 int ret = -ENOENT;
3592
3593 spin_lock(&inode->i_lock);
3594 acl = nfsi->nfs4_acl;
3595 if (acl == NULL)
3596 goto out;
3597 if (buf == NULL) /* user is just asking for length */
3598 goto out_len;
3599 if (acl->cached == 0)
3600 goto out;
3601 ret = -ERANGE; /* see getxattr(2) man page */
3602 if (acl->len > buflen)
3603 goto out;
3604 memcpy(buf, acl->data, acl->len);
3605out_len:
3606 ret = acl->len;
3607out:
3608 spin_unlock(&inode->i_lock);
3609 return ret;
3610}
3611
3612static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3613{
3614 struct nfs4_cached_acl *acl;
3615
3616 if (buf && acl_len <= PAGE_SIZE) {
3617 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3618 if (acl == NULL)
3619 goto out;
3620 acl->cached = 1;
3621 memcpy(acl->data, buf, acl_len);
3622 } else {
3623 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3624 if (acl == NULL)
3625 goto out;
3626 acl->cached = 0;
3627 }
3628 acl->len = acl_len;
3629out:
3630 nfs4_set_cached_acl(inode, acl);
3631}
3632
bf118a34
AA		 3633/*
3634 * The getxattr API returns the required buffer length when called with a
3635 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3636 * the required buf. On a NULL buf, we send a page of data to the server
3637 * guessing that the ACL request can be serviced by a page. If so, we cache
3638 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3639 * the cache. If not so, we throw away the page, and cache the required
3640 * length. The next getxattr call will then produce another round trip to
3641 * the server, this time with the input buf of the required size.
3642 */
16b4289c 3643static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3644{
bf118a34 3645 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3646 struct nfs_getaclargs args = {
3647 .fh = NFS_FH(inode),
3648 .acl_pages = pages,
3649 .acl_len = buflen,
3650 };
663c79b3
BH		 3651 struct nfs_getaclres res = {
3652 .acl_len = buflen,
3653 };
e50a1c2e 3654 void *resp_buf;
aa1870af
BF		 3655 struct rpc_message msg = {
3656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3657 .rpc_argp = &args,
663c79b3 3658 .rpc_resp = &res,
aa1870af 3659 };
bf118a34 3660 int ret = -ENOMEM, npages, i, acl_len = 0;
aa1870af 3661
bf118a34
AA		 3662 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3663 /* As long as we're doing a round trip to the server anyway,
3664 * let's be prepared for a page of acl data. */
3665 if (npages == 0)
3666 npages = 1;
3667
3668 for (i = 0; i < npages; i++) {
3669 pages[i] = alloc_page(GFP_KERNEL);
3670 if (!pages[i])
3671 goto out_free;
e50a1c2e 3672 }
bf118a34
AA		 3673 if (npages > 1) {
3674 /* for decoding across pages */
331818f1
TM		 3675 res.acl_scratch = alloc_page(GFP_KERNEL);
3676 if (!res.acl_scratch)
bf118a34 3677 goto out_free;
e50a1c2e 3678 }
bf118a34
AA		 3679 args.acl_len = npages * PAGE_SIZE;
3680 args.acl_pgbase = 0;
3681 /* Let decode_getfacl know not to fail if the ACL data is larger than
3682 * the page we send as a guess */
3683 if (buf == NULL)
3684 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3685 resp_buf = page_address(pages[0]);
3686
de040bec 3687 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3688 __func__, buf, buflen, npages, args.acl_len);
3689 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3690 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3691 if (ret)
3692 goto out_free;
bf118a34
AA		 3693
3694 acl_len = res.acl_len - res.acl_data_offset;
3695 if (acl_len > args.acl_len)
3696 nfs4_write_cached_acl(inode, NULL, acl_len);
e50a1c2e 3697 else
bf118a34
AA		 3698 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3699 acl_len);
e50a1c2e
BF		 3700 if (buf) {
3701 ret = -ERANGE;
bf118a34 3702 if (acl_len > buflen)
e50a1c2e 3703 goto out_free;
bf118a34
AA		 3704 _copy_from_pages(buf, pages, res.acl_data_offset,
3705 res.acl_len);
e50a1c2e 3706 }
bf118a34 3707 ret = acl_len;
e50a1c2e 3708out_free:
bf118a34
AA		 3709 for (i = 0; i < npages; i++)
3710 if (pages[i])
3711 __free_page(pages[i]);
331818f1
TM		 3712 if (res.acl_scratch)
3713 __free_page(res.acl_scratch);
aa1870af
BF		 3714 return ret;
3715}
3716
16b4289c
TM		 3717static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3718{
3719 struct nfs4_exception exception = { };
3720 ssize_t ret;
3721 do {
3722 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3723 if (ret >= 0)
3724 break;
3725 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3726 } while (exception.retry);
3727 return ret;
3728}
3729
e50a1c2e
BF		 3730static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3731{
3732 struct nfs_server *server = NFS_SERVER(inode);
3733 int ret;
3734
3735 if (!nfs4_server_supports_acls(server))
3736 return -EOPNOTSUPP;
3737 ret = nfs_revalidate_inode(server, inode);
3738 if (ret < 0)
3739 return ret;
08a22b39
AK		 3740 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3741 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3742 ret = nfs4_read_cached_acl(inode, buf, buflen);
3743 if (ret != -ENOENT)
bf118a34
AA		 3744 /* -ENOENT is returned if there is no ACL or if there is an ACL
3745 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3746 return ret;
3747 return nfs4_get_acl_uncached(inode, buf, buflen);
3748}
3749
16b4289c 3750static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3751{
3752 struct nfs_server *server = NFS_SERVER(inode);
3753 struct page *pages[NFS4ACL_MAXPAGES];
3754 struct nfs_setaclargs arg = {
3755 .fh = NFS_FH(inode),
3756 .acl_pages = pages,
3757 .acl_len = buflen,
3758 };
73c403a9 3759 struct nfs_setaclres res;
4b580ee3
BF		 3760 struct rpc_message msg = {
3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3762 .rpc_argp = &arg,
73c403a9 3763 .rpc_resp = &res,
4b580ee3 3764 };
e9e3d724 3765 int ret, i;
4b580ee3
BF		 3766
3767 if (!nfs4_server_supports_acls(server))
3768 return -EOPNOTSUPP;
e9e3d724
NH		 3769 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3770 if (i < 0)
3771 return i;
642ac549 3772 nfs_inode_return_delegation(inode);
7c513058 3773 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3774
3775 /*
3776 * Free each page after tx, so the only ref left is
3777 * held by the network stack
3778 */
3779 for (; i > 0; i--)
3780 put_page(pages[i-1]);
3781
08a22b39
AK		 3782 /*
3783 * Acl update can result in inode attribute update.
3784 * so mark the attribute cache invalid.
3785 */
3786 spin_lock(&inode->i_lock);
3787 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3788 spin_unlock(&inode->i_lock);
f41f7418
TM		 3789 nfs_access_zap_cache(inode);
3790 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3791 return ret;
3792}
3793
16b4289c
TM		 3794static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3795{
3796 struct nfs4_exception exception = { };
3797 int err;
3798 do {
3799 err = nfs4_handle_exception(NFS_SERVER(inode),
3800 __nfs4_proc_set_acl(inode, buf, buflen),
3801 &exception);
3802 } while (exception.retry);
3803 return err;
3804}
3805
1da177e4 3806static int
aa5190d0 3807nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3808{
aa5190d0
TM		 3809 struct nfs_client *clp = server->nfs_client;
3810
3811 if (task->tk_status >= 0)
1da177e4
LT		 3812 return 0;
3813 switch(task->tk_status) {
a1d0b5ee 3814 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3815 case -NFS4ERR_ADMIN_REVOKED:
3816 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 3817 if (state != NULL)
3818 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3819 case -NFS4ERR_OPENMODE:
3820 if (state == NULL)
3821 break;
0400a6b0
TM		 3822 nfs4_schedule_stateid_recovery(server, state);
3823 goto wait_on_recovery;
0ced63d1
TM		 3824 case -NFS4ERR_EXPIRED:
3825 if (state != NULL)
3826 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3827 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3828 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3829 nfs4_schedule_lease_recovery(clp);
3830 goto wait_on_recovery;
4745e315
AA		 3831#if defined(CONFIG_NFS_V4_1)
3832 case -NFS4ERR_BADSESSION:
3833 case -NFS4ERR_BADSLOT:
3834 case -NFS4ERR_BAD_HIGH_SLOT:
3835 case -NFS4ERR_DEADSESSION:
3836 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3837 case -NFS4ERR_SEQ_FALSE_RETRY:
3838 case -NFS4ERR_SEQ_MISORDERED:
3839 dprintk("%s ERROR %d, Reset session\n", __func__,
3840 task->tk_status);
0400a6b0 3841 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3842 task->tk_status = 0;
3843 return -EAGAIN;
3844#endif /* CONFIG_NFS_V4_1 */
1da177e4 3845 case -NFS4ERR_DELAY:
aa5190d0 3846 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3847 case -NFS4ERR_GRACE:
2c643488 3848 case -EKEYEXPIRED:
1da177e4
LT		 3849 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3850 task->tk_status = 0;
3851 return -EAGAIN;
a8a4ae3a 3852 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3853 case -NFS4ERR_OLD_STATEID:
3854 task->tk_status = 0;
3855 return -EAGAIN;
3856 }
3857 task->tk_status = nfs4_map_errors(task->tk_status);
3858 return 0;
0400a6b0 3859wait_on_recovery:
a2c0b9e2 3860 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3861 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3862 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3863 task->tk_status = 0;
3864 return -EAGAIN;
1da177e4
LT		 3865}
3866
cd93710e
CL		 3867static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3868 nfs4_verifier *bootverf)
3869{
3870 __be32 verf[2];
3871
3872 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3873 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3874 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3875}
3876
bb8b27e5
TM		 3877int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3878 unsigned short port, struct rpc_cred *cred,
3879 struct nfs4_setclientid_res *res)
1da177e4
LT		 3880{
3881 nfs4_verifier sc_verifier;
3882 struct nfs4_setclientid setclientid = {
3883 .sc_verifier = &sc_verifier,
3884 .sc_prog = program,
f4eecd5d 3885 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3886 };
3887 struct rpc_message msg = {
3888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3889 .rpc_argp = &setclientid,
bb8b27e5 3890 .rpc_resp = res,
286d7d6a 3891 .rpc_cred = cred,
1da177e4 3892 };
1da177e4
LT		 3893 int loop = 0;
3894 int status;
3895
cd93710e 3896 nfs4_construct_boot_verifier(clp, &sc_verifier);
1da177e4
LT		 3897
3898 for(;;) {
2446ab60 3899 rcu_read_lock();
1da177e4 3900 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3901 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3902 clp->cl_ipaddr,
3903 rpc_peeraddr2str(clp->cl_rpcclient,
3904 RPC_DISPLAY_ADDR),
69dd716c
TM		 3905 rpc_peeraddr2str(clp->cl_rpcclient,
3906 RPC_DISPLAY_PROTO),
78ea323b 3907 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3908 clp->cl_id_uniquifier);
3909 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3910 sizeof(setclientid.sc_netid),
3911 rpc_peeraddr2str(clp->cl_rpcclient,
3912 RPC_DISPLAY_NETID));
1da177e4 3913 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3914 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4 3915 clp->cl_ipaddr, port >> 8, port & 255);
2446ab60 3916 rcu_read_unlock();
1da177e4 3917
1bd714f2 3918 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3919 if (status != -NFS4ERR_CLID_INUSE)
3920 break;
fd954ae1
TM		 3921 if (loop != 0) {
3922 ++clp->cl_id_uniquifier;
1da177e4 3923 break;
fd954ae1
TM		 3924 }
3925 ++loop;
3926 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3927 }
3928 return status;
3929}
3930
fd954ae1 3931int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3932 struct nfs4_setclientid_res *arg,
3933 struct rpc_cred *cred)
1da177e4
LT		 3934{
3935 struct nfs_fsinfo fsinfo;
3936 struct rpc_message msg = {
3937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3938 .rpc_argp = arg,
1da177e4 3939 .rpc_resp = &fsinfo,
286d7d6a 3940 .rpc_cred = cred,
1da177e4
LT		 3941 };
3942 unsigned long now;
3943 int status;
3944
3945 now = jiffies;
1bd714f2 3946 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3947 if (status == 0) {
3948 spin_lock(&clp->cl_lock);
3949 clp->cl_lease_time = fsinfo.lease_time * HZ;
3950 clp->cl_last_renewal = now;
3951 spin_unlock(&clp->cl_lock);
3952 }
3953 return status;
3954}
3955
fe650407
TM		 3956struct nfs4_delegreturndata {
3957 struct nfs4_delegreturnargs args;
fa178f29 3958 struct nfs4_delegreturnres res;
fe650407
TM		 3959 struct nfs_fh fh;
3960 nfs4_stateid stateid;
26e976a8 3961 unsigned long timestamp;
fa178f29 3962 struct nfs_fattr fattr;
fe650407
TM		 3963 int rpc_status;
3964};
3965
fe650407
TM		 3966static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3967{
3968 struct nfs4_delegreturndata *data = calldata;
938e1010 3969
14516c3a
TM		 3970 if (!nfs4_sequence_done(task, &data->res.seq_res))
3971 return;
938e1010 3972
79708861
RL		 3973 switch (task->tk_status) {
3974 case -NFS4ERR_STALE_STATEID:
3975 case -NFS4ERR_EXPIRED:
3976 case 0:
fa178f29 3977 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3978 break;
3979 default:
3980 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3981 -EAGAIN) {
d00c5d43 3982 rpc_restart_call_prepare(task);
79708861
RL		 3983 return;
3984 }
3985 }
3986 data->rpc_status = task->tk_status;
fe650407
TM		 3987}
3988
3989static void nfs4_delegreturn_release(void *calldata)
3990{
fe650407
TM		 3991 kfree(calldata);
3992}
3993
938e1010
AA		 3994#if defined(CONFIG_NFS_V4_1)
3995static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3996{
3997 struct nfs4_delegreturndata *d_data;
3998
3999 d_data = (struct nfs4_delegreturndata *)data;
4000
035168ab 4001 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4002 &d_data->args.seq_args,
9d12b216 4003 &d_data->res.seq_res, task))
938e1010
AA		 4004 return;
4005 rpc_call_start(task);
4006}
4007#endif /* CONFIG_NFS_V4_1 */
4008
c8d149f3 4009static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4010#if defined(CONFIG_NFS_V4_1)
4011 .rpc_call_prepare = nfs4_delegreturn_prepare,
4012#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4013 .rpc_call_done = nfs4_delegreturn_done,
4014 .rpc_release = nfs4_delegreturn_release,
4015};
4016
e6f81075 4017static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4018{
4019 struct nfs4_delegreturndata *data;
fa178f29 4020 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4021 struct rpc_task *task;
5138fde0
TM		 4022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4024 .rpc_cred = cred,
4025 };
c970aa85
TM		 4026 struct rpc_task_setup task_setup_data = {
4027 .rpc_client = server->client,
5138fde0 4028 .rpc_message = &msg,
c970aa85
TM		 4029 .callback_ops = &nfs4_delegreturn_ops,
4030 .flags = RPC_TASK_ASYNC,
4031 };
e6f81075 4032 int status = 0;
fe650407 4033
8535b2be 4034 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4035 if (data == NULL)
4036 return -ENOMEM;
9d12b216 4037 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4038 data->args.fhandle = &data->fh;
4039 data->args.stateid = &data->stateid;
fa178f29 4040 data->args.bitmask = server->attr_bitmask;
fe650407 4041 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4042 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4043 data->res.fattr = &data->fattr;
4044 data->res.server = server;
5138fde0 4045 nfs_fattr_init(data->res.fattr);
26e976a8 4046 data->timestamp = jiffies;
fe650407
TM		 4047 data->rpc_status = 0;
4048
c970aa85 4049 task_setup_data.callback_data = data;
1174dd1f
TM		 4050 msg.rpc_argp = &data->args;
4051 msg.rpc_resp = &data->res;
c970aa85 4052 task = rpc_run_task(&task_setup_data);
7a1218a2 4053 if (IS_ERR(task))
fe650407 4054 return PTR_ERR(task);
e6f81075
TM		 4055 if (!issync)
4056 goto out;
fe650407 4057 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4058 if (status != 0)
4059 goto out;
4060 status = data->rpc_status;
4061 if (status != 0)
4062 goto out;
4063 nfs_refresh_inode(inode, &data->fattr);
4064out:
e6b3c4db 4065 rpc_put_task(task);
fe650407 4066 return status;
1da177e4
LT		 4067}
4068
e6f81075 4069int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4070{
4071 struct nfs_server *server = NFS_SERVER(inode);
4072 struct nfs4_exception exception = { };
4073 int err;
4074 do {
e6f81075 4075 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4076 switch (err) {
4077 case -NFS4ERR_STALE_STATEID:
4078 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4079 case 0:
4080 return 0;
4081 }
4082 err = nfs4_handle_exception(server, err, &exception);
4083 } while (exception.retry);
4084 return err;
4085}
4086
4087#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4088#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4089
4090/*
4091 * sleep, with exponential backoff, and retry the LOCK operation.
4092 */
4093static unsigned long
4094nfs4_set_lock_task_retry(unsigned long timeout)
4095{
d310310c 4096 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4097 timeout <<= 1;
4098 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4099 return NFS4_LOCK_MAXTIMEOUT;
4100 return timeout;
4101}
4102
1da177e4
LT		 4103static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4104{
4105 struct inode *inode = state->inode;
4106 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4107 struct nfs_client *clp = server->nfs_client;
911d1aaf 4108 struct nfs_lockt_args arg = {
1da177e4 4109 .fh = NFS_FH(inode),
911d1aaf 4110 .fl = request,
1da177e4 4111 };
911d1aaf
TM		 4112 struct nfs_lockt_res res = {
4113 .denied = request,
1da177e4
LT		 4114 };
4115 struct rpc_message msg = {
4116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4117 .rpc_argp = &arg,
4118 .rpc_resp = &res,
4119 .rpc_cred = state->owner->so_cred,
4120 };
1da177e4
LT		 4121 struct nfs4_lock_state *lsp;
4122 int status;
4123
911d1aaf 4124 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4125 status = nfs4_set_lock_state(state, request);
4126 if (status != 0)
4127 goto out;
4128 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4129 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4130 arg.lock_owner.s_dev = server->s_dev;
7c513058 4131 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4132 switch (status) {
4133 case 0:
4134 request->fl_type = F_UNLCK;
4135 break;
4136 case -NFS4ERR_DENIED:
4137 status = 0;
1da177e4 4138 }
70cc6487 4139 request->fl_ops->fl_release_private(request);
8d0a8a9d 4140out:
1da177e4
LT		 4141 return status;
4142}
4143
4144static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4145{
4146 struct nfs4_exception exception = { };
4147 int err;
4148
4149 do {
4150 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4151 _nfs4_proc_getlk(state, cmd, request),
4152 &exception);
4153 } while (exception.retry);
4154 return err;
4155}
4156
4157static int do_vfs_lock(struct file *file, struct file_lock *fl)
4158{
4159 int res = 0;
4160 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4161 case FL_POSIX:
4162 res = posix_lock_file_wait(file, fl);
4163 break;
4164 case FL_FLOCK:
4165 res = flock_lock_file_wait(file, fl);
4166 break;
4167 default:
4168 BUG();
4169 }
1da177e4
LT		 4170 return res;
4171}
4172
faf5f49c 4173struct nfs4_unlockdata {
911d1aaf
TM		 4174 struct nfs_locku_args arg;
4175 struct nfs_locku_res res;
faf5f49c
TM		 4176 struct nfs4_lock_state *lsp;
4177 struct nfs_open_context *ctx;
911d1aaf
TM		 4178 struct file_lock fl;
4179 const struct nfs_server *server;
26e976a8 4180 unsigned long timestamp;
faf5f49c
TM		 4181};
4182
911d1aaf
TM		 4183static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4184 struct nfs_open_context *ctx,
4185 struct nfs4_lock_state *lsp,
4186 struct nfs_seqid *seqid)
4187{
4188 struct nfs4_unlockdata *p;
4189 struct inode *inode = lsp->ls_state->inode;
4190
8535b2be 4191 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4192 if (p == NULL)
4193 return NULL;
4194 p->arg.fh = NFS_FH(inode);
4195 p->arg.fl = &p->fl;
4196 p->arg.seqid = seqid;
c1d51931 4197 p->res.seqid = seqid;
911d1aaf
TM		 4198 p->arg.stateid = &lsp->ls_stateid;
4199 p->lsp = lsp;
4200 atomic_inc(&lsp->ls_count);
4201 /* Ensure we don't close file until we're done freeing locks! */
4202 p->ctx = get_nfs_open_context(ctx);
4203 memcpy(&p->fl, fl, sizeof(p->fl));
4204 p->server = NFS_SERVER(inode);
4205 return p;
4206}
4207
06f814a3 4208static void nfs4_locku_release_calldata(void *data)
faf5f49c 4209{
963d8fe5 4210 struct nfs4_unlockdata *calldata = data;
911d1aaf 4211 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4212 nfs4_put_lock_state(calldata->lsp);
4213 put_nfs_open_context(calldata->ctx);
4214 kfree(calldata);
faf5f49c
TM		 4215}
4216
963d8fe5 4217static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4218{
963d8fe5 4219 struct nfs4_unlockdata *calldata = data;
faf5f49c 4220
14516c3a
TM		 4221 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4222 return;
faf5f49c
TM		 4223 switch (task->tk_status) {
4224 case 0:
f597c537
TM		 4225 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4226 &calldata->res.stateid);
26e976a8 4227 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4228 break;
9e33bed5
TM		 4229 case -NFS4ERR_BAD_STATEID:
4230 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4231 case -NFS4ERR_STALE_STATEID:
4232 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4233 break;
4234 default:
9e33bed5 4235 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4236 rpc_restart_call_prepare(task);
faf5f49c 4237 }
faf5f49c
TM		 4238}
4239
4ce70ada 4240static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4241{
4ce70ada 4242 struct nfs4_unlockdata *calldata = data;
faf5f49c 4243
911d1aaf 4244 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4245 return;
4246 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4247 /* Note: exit _without_ running nfs4_locku_done */
4248 task->tk_action = NULL;
faf5f49c
TM		 4249 return;
4250 }
26e976a8 4251 calldata->timestamp = jiffies;
035168ab 4252 if (nfs4_setup_sequence(calldata->server,
a893693c 4253 &calldata->arg.seq_args,
9d12b216 4254 &calldata->res.seq_res, task))
a893693c 4255 return;
5138fde0 4256 rpc_call_start(task);
faf5f49c
TM		 4257}
4258
963d8fe5 4259static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4260 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4261 .rpc_call_done = nfs4_locku_done,
06f814a3 4262 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4263};
4264
a5d16a4d
TM		 4265static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4266 struct nfs_open_context *ctx,
4267 struct nfs4_lock_state *lsp,
4268 struct nfs_seqid *seqid)
4269{
4270 struct nfs4_unlockdata *data;
5138fde0
TM		 4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4273 .rpc_cred = ctx->cred,
4274 };
c970aa85
TM		 4275 struct rpc_task_setup task_setup_data = {
4276 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4277 .rpc_message = &msg,
c970aa85 4278 .callback_ops = &nfs4_locku_ops,
101070ca 4279 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4280 .flags = RPC_TASK_ASYNC,
4281 };
a5d16a4d 4282
137d6aca
FF		 4283 /* Ensure this is an unlock - when canceling a lock, the
4284 * canceled lock is passed in, and it won't be an unlock.
4285 */
4286 fl->fl_type = F_UNLCK;
4287
a5d16a4d
TM		 4288 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4289 if (data == NULL) {
4290 nfs_free_seqid(seqid);
4291 return ERR_PTR(-ENOMEM);
4292 }
4293
9d12b216 4294 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4295 msg.rpc_argp = &data->arg;
4296 msg.rpc_resp = &data->res;
c970aa85
TM		 4297 task_setup_data.callback_data = data;
4298 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4299}
4300
faf5f49c
TM		 4301static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4302{
19e03c57 4303 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4304 struct nfs_seqid *seqid;
1da177e4 4305 struct nfs4_lock_state *lsp;
06f814a3
TM		 4306 struct rpc_task *task;
4307 int status = 0;
536ff0f8 4308 unsigned char fl_flags = request->fl_flags;
faf5f49c 4309
8d0a8a9d 4310 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4311 /* Unlock _before_ we do the RPC call */
4312 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4313 down_read(&nfsi->rwsem);
4314 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4315 up_read(&nfsi->rwsem);
9b073574 4316 goto out;
19e03c57
TM		 4317 }
4318 up_read(&nfsi->rwsem);
8d0a8a9d 4319 if (status != 0)
9b073574
TM		 4320 goto out;
4321 /* Is this a delegated lock? */
4322 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4323 goto out;
8d0a8a9d 4324 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4325 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4326 status = -ENOMEM;
911d1aaf 4327 if (seqid == NULL)
9b073574 4328 goto out;
cd3758e3 4329 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4330 status = PTR_ERR(task);
4331 if (IS_ERR(task))
9b073574 4332 goto out;
a5d16a4d 4333 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4334 rpc_put_task(task);
9b073574 4335out:
536ff0f8 4336 request->fl_flags = fl_flags;
1da177e4
LT		 4337 return status;
4338}
4339
a5d16a4d
TM		 4340struct nfs4_lockdata {
4341 struct nfs_lock_args arg;
4342 struct nfs_lock_res res;
4343 struct nfs4_lock_state *lsp;
4344 struct nfs_open_context *ctx;
4345 struct file_lock fl;
26e976a8 4346 unsigned long timestamp;
a5d16a4d
TM		 4347 int rpc_status;
4348 int cancelled;
66179efe 4349 struct nfs_server *server;
a5d16a4d
TM		 4350};
4351
4352static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4353 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4354 gfp_t gfp_mask)
1da177e4 4355{
a5d16a4d
TM		 4356 struct nfs4_lockdata *p;
4357 struct inode *inode = lsp->ls_state->inode;
1da177e4 4358 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4359
8535b2be 4360 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4361 if (p == NULL)
4362 return NULL;
4363
4364 p->arg.fh = NFS_FH(inode);
4365 p->arg.fl = &p->fl;
8535b2be 4366 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4367 if (p->arg.open_seqid == NULL)
4368 goto out_free;
8535b2be 4369 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4370 if (p->arg.lock_seqid == NULL)
2f74c0a0 4371 goto out_free_seqid;
a5d16a4d 4372 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4373 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4374 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4375 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4376 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4377 p->lsp = lsp;
66179efe 4378 p->server = server;
a5d16a4d
TM		 4379 atomic_inc(&lsp->ls_count);
4380 p->ctx = get_nfs_open_context(ctx);
4381 memcpy(&p->fl, fl, sizeof(p->fl));
4382 return p;
2f74c0a0
TM		 4383out_free_seqid:
4384 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4385out_free:
4386 kfree(p);
4387 return NULL;
4388}
4389
4390static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4391{
4392 struct nfs4_lockdata *data = calldata;
4393 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4394
3110ff80 4395 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4396 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4397 return;
a5d16a4d
TM		 4398 /* Do we need to do an open_to_lock_owner? */
4399 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4400 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4401 return;
a5d16a4d
TM		 4402 data->arg.open_stateid = &state->stateid;
4403 data->arg.new_lock_owner = 1;
c1d51931 4404 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4405 } else
4406 data->arg.new_lock_owner = 0;
26e976a8 4407 data->timestamp = jiffies;
035168ab
TM		 4408 if (nfs4_setup_sequence(data->server,
4409 &data->arg.seq_args,
9d12b216 4410 &data->res.seq_res, task))
66179efe 4411 return;
5138fde0 4412 rpc_call_start(task);
3110ff80 4413 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4414}
4415
b257957e
AB		 4416static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4417{
4418 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4419 nfs4_lock_prepare(task, calldata);
4420}
4421
a5d16a4d
TM		 4422static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4423{
4424 struct nfs4_lockdata *data = calldata;
4425
3110ff80 4426 dprintk("%s: begin!\n", __func__);
a5d16a4d 4427
14516c3a
TM		 4428 if (!nfs4_sequence_done(task, &data->res.seq_res))
4429 return;
66179efe 4430
a5d16a4d 4431 data->rpc_status = task->tk_status;
a5d16a4d 4432 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4433 if (data->rpc_status == 0)
4434 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4435 else
4436 goto out;
4437 }
4438 if (data->rpc_status == 0) {
f597c537 4439 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
a5d16a4d 4440 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4441 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4442 }
a5d16a4d 4443out:
3110ff80 4444 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4445}
4446
4447static void nfs4_lock_release(void *calldata)
4448{
4449 struct nfs4_lockdata *data = calldata;
4450
3110ff80 4451 dprintk("%s: begin!\n", __func__);
2f74c0a0 4452 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4453 if (data->cancelled != 0) {
4454 struct rpc_task *task;
4455 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4456 data->arg.lock_seqid);
4457 if (!IS_ERR(task))
bf294b41 4458 rpc_put_task_async(task);
3110ff80 4459 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4460 } else
4461 nfs_free_seqid(data->arg.lock_seqid);
4462 nfs4_put_lock_state(data->lsp);
4463 put_nfs_open_context(data->ctx);
4464 kfree(data);
3110ff80 4465 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4466}
4467
4468static const struct rpc_call_ops nfs4_lock_ops = {
4469 .rpc_call_prepare = nfs4_lock_prepare,
4470 .rpc_call_done = nfs4_lock_done,
4471 .rpc_release = nfs4_lock_release,
4472};
4473
b257957e
AB		 4474static const struct rpc_call_ops nfs4_recover_lock_ops = {
4475 .rpc_call_prepare = nfs4_recover_lock_prepare,
4476 .rpc_call_done = nfs4_lock_done,
4477 .rpc_release = nfs4_lock_release,
4478};
4479
2bee72a6
TM		 4480static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4481{
2bee72a6
TM		 4482 switch (error) {
4483 case -NFS4ERR_ADMIN_REVOKED:
4484 case -NFS4ERR_BAD_STATEID:
ecac799a 4485 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4486 if (new_lock_owner != 0 ||
4487 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4488 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4489 break;
4490 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4491 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4492 case -NFS4ERR_EXPIRED:
4493 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4494 };
4495}
4496
afe6c27c 4497static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4498{
4499 struct nfs4_lockdata *data;
4500 struct rpc_task *task;
5138fde0
TM		 4501 struct rpc_message msg = {
4502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4503 .rpc_cred = state->owner->so_cred,
4504 };
c970aa85
TM		 4505 struct rpc_task_setup task_setup_data = {
4506 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4507 .rpc_message = &msg,
c970aa85 4508 .callback_ops = &nfs4_lock_ops,
101070ca 4509 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4510 .flags = RPC_TASK_ASYNC,
4511 };
a5d16a4d
TM		 4512 int ret;
4513
3110ff80 4514 dprintk("%s: begin!\n", __func__);
cd3758e3 4515 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4516 fl->fl_u.nfs4_fl.owner,
4517 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4518 if (data == NULL)
4519 return -ENOMEM;
4520 if (IS_SETLKW(cmd))
4521 data->arg.block = 1;
b257957e
AB		 4522 if (recovery_type > NFS_LOCK_NEW) {
4523 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4524 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4525 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4526 }
9d12b216 4527 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4528 msg.rpc_argp = &data->arg;
4529 msg.rpc_resp = &data->res;
c970aa85
TM		 4530 task_setup_data.callback_data = data;
4531 task = rpc_run_task(&task_setup_data);
7a1218a2 4532 if (IS_ERR(task))
a5d16a4d 4533 return PTR_ERR(task);
a5d16a4d
TM		 4534 ret = nfs4_wait_for_completion_rpc_task(task);
4535 if (ret == 0) {
4536 ret = data->rpc_status;
2bee72a6
TM		 4537 if (ret)
4538 nfs4_handle_setlk_error(data->server, data->lsp,
4539 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4540 } else
4541 data->cancelled = 1;
e6b3c4db 4542 rpc_put_task(task);
3110ff80 4543 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4544 return ret;
1da177e4
LT		 4545}
4546
4547static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4548{
202b50dc
TM		 4549 struct nfs_server *server = NFS_SERVER(state->inode);
4550 struct nfs4_exception exception = { };
4551 int err;
4552
4553 do {
42a2d13e
TM		 4554 /* Cache the lock if possible... */
4555 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4556 return 0;
afe6c27c 4557 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4558 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4559 break;
4560 nfs4_handle_exception(server, err, &exception);
4561 } while (exception.retry);
4562 return err;
1da177e4
LT		 4563}
4564
4565static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4566{
202b50dc
TM		 4567 struct nfs_server *server = NFS_SERVER(state->inode);
4568 struct nfs4_exception exception = { };
4569 int err;
4570
6bfc93ef
TM		 4571 err = nfs4_set_lock_state(state, request);
4572 if (err != 0)
4573 return err;
202b50dc 4574 do {
42a2d13e
TM		 4575 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4576 return 0;
afe6c27c 4577 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4578 switch (err) {
4579 default:
4580 goto out;
4581 case -NFS4ERR_GRACE:
4582 case -NFS4ERR_DELAY:
4583 nfs4_handle_exception(server, err, &exception);
4584 err = 0;
4585 }
202b50dc 4586 } while (exception.retry);
a9ed2e25 4587out:
202b50dc 4588 return err;
1da177e4
LT		 4589}
4590
f062eb6c 4591#if defined(CONFIG_NFS_V4_1)
b01dd1d8 4592static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4593{
b01dd1d8
BS		 4594 int status, ret = NFS_OK;
4595 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4596 struct nfs_server *server = NFS_SERVER(state->inode);
4597
b01dd1d8
BS		 4598 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4599 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4600 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4601 if (status != NFS_OK) {
4602 nfs41_free_stateid(server, &lsp->ls_stateid);
4603 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4604 ret = status;
4605 }
4606 }
4607 };
4608
4609 return ret;
4610}
4611
4612static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4613{
4614 int status = NFS_OK;
4615
4616 if (test_bit(LK_STATE_IN_USE, &state->flags))
4617 status = nfs41_check_expired_locks(state);
f062eb6c 4618 if (status == NFS_OK)
b01dd1d8 4619 return status;
f062eb6c
BS		 4620 return nfs4_lock_expired(state, request);
4621}
4622#endif
4623
1da177e4
LT		 4624static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4625{
19e03c57 4626 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4627 unsigned char fl_flags = request->fl_flags;
8e469ebd 4628 int status = -ENOLCK;
1da177e4 4629
8e469ebd
TM		 4630 if ((fl_flags & FL_POSIX) &&
4631 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4632 goto out;
6bfc93ef 4633 /* Is this a delegated open? */
6bfc93ef
TM		 4634 status = nfs4_set_lock_state(state, request);
4635 if (status != 0)
4636 goto out;
01c3b861
TM		 4637 request->fl_flags |= FL_ACCESS;
4638 status = do_vfs_lock(request->fl_file, request);
4639 if (status < 0)
4640 goto out;
19e03c57 4641 down_read(&nfsi->rwsem);
01c3b861 4642 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4643 /* Yes: cache locks! */
01c3b861 4644 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4645 request->fl_flags = fl_flags & ~FL_SLEEP;
4646 status = do_vfs_lock(request->fl_file, request);
4647 goto out_unlock;
01c3b861 4648 }
afe6c27c 4649 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4650 if (status != 0)
01c3b861 4651 goto out_unlock;
6bfc93ef 4652 /* Note: we always want to sleep here! */
01c3b861 4653 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4654 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4655 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4656 "manager!\n", __func__);
01c3b861 4657out_unlock:
19e03c57 4658 up_read(&nfsi->rwsem);
01c3b861
TM		 4659out:
4660 request->fl_flags = fl_flags;
1da177e4
LT		 4661 return status;
4662}
4663
4664static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4665{
a1d0b5ee
TM		 4666 struct nfs4_exception exception = {
4667 .state = state,
4668 };
1da177e4
LT		 4669 int err;
4670
4671 do {
965b5d67
TM		 4672 err = _nfs4_proc_setlk(state, cmd, request);
4673 if (err == -NFS4ERR_DENIED)
4674 err = -EAGAIN;
1da177e4 4675 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4676 err, &exception);
1da177e4
LT		 4677 } while (exception.retry);
4678 return err;
4679}
4680
4681static int
4682nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4683{
4684 struct nfs_open_context *ctx;
4685 struct nfs4_state *state;
4686 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4687 int status;
4688
4689 /* verify open state */
cd3758e3 4690 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4691 state = ctx->state;
4692
4693 if (request->fl_start < 0 || request->fl_end < 0)
4694 return -EINVAL;
4695
d953126a
TM		 4696 if (IS_GETLK(cmd)) {
4697 if (state != NULL)
4698 return nfs4_proc_getlk(state, F_GETLK, request);
4699 return 0;
4700 }
1da177e4
LT		 4701
4702 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4703 return -EINVAL;
4704
d953126a
TM		 4705 if (request->fl_type == F_UNLCK) {
4706 if (state != NULL)
4707 return nfs4_proc_unlck(state, cmd, request);
4708 return 0;
4709 }
1da177e4 4710
d953126a
TM		 4711 if (state == NULL)
4712 return -ENOLCK;
1da177e4
LT		 4713 do {
4714 status = nfs4_proc_setlk(state, cmd, request);
4715 if ((status != -EAGAIN) || IS_SETLK(cmd))
4716 break;
4717 timeout = nfs4_set_lock_task_retry(timeout);
4718 status = -ERESTARTSYS;
4719 if (signalled())
4720 break;
4721 } while(status < 0);
1da177e4
LT		 4722 return status;
4723}
4724
888e694c
TM		 4725int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4726{
4727 struct nfs_server *server = NFS_SERVER(state->inode);
4728 struct nfs4_exception exception = { };
4729 int err;
4730
4731 err = nfs4_set_lock_state(state, fl);
4732 if (err != 0)
4733 goto out;
4734 do {
afe6c27c 4735 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4736 switch (err) {
4737 default:
a030889a
WAA		 4738 printk(KERN_ERR "NFS: %s: unhandled error "
4739 "%d.\n", __func__, err);
d5122201 4740 case 0:
965b5d67 4741 case -ESTALE:
d5122201
TM		 4742 goto out;
4743 case -NFS4ERR_EXPIRED:
0ced63d1 4744 nfs4_schedule_stateid_recovery(server, state);
d5122201 4745 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4746 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4747 nfs4_schedule_lease_recovery(server->nfs_client);
4748 goto out;
74e7bb73
RL		 4749 case -NFS4ERR_BADSESSION:
4750 case -NFS4ERR_BADSLOT:
4751 case -NFS4ERR_BAD_HIGH_SLOT:
4752 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4753 case -NFS4ERR_DEADSESSION:
0400a6b0 4754 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4755 goto out;
965b5d67
TM		 4756 case -ERESTARTSYS:
4757 /*
4758 * The show must go on: exit, but mark the
4759 * stateid as needing recovery.
4760 */
a1d0b5ee 4761 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4762 case -NFS4ERR_ADMIN_REVOKED:
4763 case -NFS4ERR_BAD_STATEID:
4764 case -NFS4ERR_OPENMODE:
0400a6b0 4765 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4766 err = 0;
4767 goto out;
168667c4
TM		 4768 case -EKEYEXPIRED:
4769 /*
4770 * User RPCSEC_GSS context has expired.
4771 * We cannot recover this stateid now, so
4772 * skip it and allow recovery thread to
4773 * proceed.
4774 */
4775 err = 0;
4776 goto out;
965b5d67
TM		 4777 case -ENOMEM:
4778 case -NFS4ERR_DENIED:
4779 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4780 err = 0;
4781 goto out;
d5122201
TM		 4782 case -NFS4ERR_DELAY:
4783 break;
4784 }
888e694c
TM		 4785 err = nfs4_handle_exception(server, err, &exception);
4786 } while (exception.retry);
4787out:
4788 return err;
4789}
6b3b5496 4790
cf470c3e
TM		 4791struct nfs_release_lockowner_data {
4792 struct nfs4_lock_state *lsp;
5ae67c4f 4793 struct nfs_server *server;
cf470c3e
TM		 4794 struct nfs_release_lockowner_args args;
4795};
4796
d3c7b7cc
TM		 4797static void nfs4_release_lockowner_release(void *calldata)
4798{
cf470c3e 4799 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4800 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4801 kfree(calldata);
4802}
4803
17280175 4804static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4805 .rpc_release = nfs4_release_lockowner_release,
4806};
4807
cf470c3e 4808int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4809{
4810 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4811 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4812 struct rpc_message msg = {
4813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4814 };
4815
4816 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4817 return -EINVAL;
4818 data = kmalloc(sizeof(*data), GFP_NOFS);
4819 if (!data)
4820 return -ENOMEM;
4821 data->lsp = lsp;
5ae67c4f 4822 data->server = server;
cf470c3e
TM		 4823 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4824 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4825 data->args.lock_owner.s_dev = server->s_dev;
4826 msg.rpc_argp = &data->args;
4827 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4828 return 0;
d3c7b7cc
TM		 4829}
4830
aa1870af
BF		 4831#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4832
64c2ce8b
AK		 4833static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4834 const void *buf, size_t buflen,
4835 int flags, int type)
6b3b5496 4836{
64c2ce8b
AK		 4837 if (strcmp(key, "") != 0)
4838 return -EINVAL;
4b580ee3 4839
64c2ce8b 4840 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4841}
4842
64c2ce8b
AK		 4843static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4844 void *buf, size_t buflen, int type)
6b3b5496 4845{
64c2ce8b
AK		 4846 if (strcmp(key, "") != 0)
4847 return -EINVAL;
aa1870af 4848
64c2ce8b 4849 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4850}
4851
64c2ce8b
AK		 4852static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4853 size_t list_len, const char *name,
4854 size_t name_len, int type)
6b3b5496 4855{
64c2ce8b 4856 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4857
096455a2
BF		 4858 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4859 return 0;
64c2ce8b
AK		 4860
4861 if (list && len <= list_len)
4862 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4863 return len;
6b3b5496
BF		 4864}
4865
533eb461
AA		 4866/*
4867 * nfs_fhget will use either the mounted_on_fileid or the fileid
4868 */
69aaaae1
TM		 4869static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4870{
533eb461
AA		 4871 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4872 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4873 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 4874 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 4875 return;
4876
4877 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 4878 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 4879 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4880 fattr->nlink = 2;
4881}
4882
56659e99 4883int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4884 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4885{
4886 struct nfs_server *server = NFS_SERVER(dir);
4887 u32 bitmask[2] = {
361e624f 4888 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4889 };
4890 struct nfs4_fs_locations_arg args = {
4891 .dir_fh = NFS_FH(dir),
c228fd3a 4892 .name = name,
683b57b4
TM		 4893 .page = page,
4894 .bitmask = bitmask,
4895 };
22958463
BH		 4896 struct nfs4_fs_locations_res res = {
4897 .fs_locations = fs_locations,
4898 };
683b57b4
TM		 4899 struct rpc_message msg = {
4900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4901 .rpc_argp = &args,
22958463 4902 .rpc_resp = &res,
683b57b4
TM		 4903 };
4904 int status;
4905
3110ff80 4906 dprintk("%s: start\n", __func__);
533eb461
AA		 4907
4908 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4909 * is not supported */
4910 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4911 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4912 else
4913 bitmask[0] |= FATTR4_WORD0_FILEID;
4914
c228fd3a 4915 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4916 fs_locations->server = server;
830b8e33 4917 fs_locations->nlocations = 0;
7c513058 4918 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4919 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4920 return status;
4921}
4922
5a5ea0d4
BS		 4923static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4924{
4925 int status;
4926 struct nfs4_secinfo_arg args = {
4927 .dir_fh = NFS_FH(dir),
4928 .name = name,
4929 };
4930 struct nfs4_secinfo_res res = {
4931 .flavors = flavors,
4932 };
4933 struct rpc_message msg = {
4934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4935 .rpc_argp = &args,
4936 .rpc_resp = &res,
4937 };
4938
4939 dprintk("NFS call secinfo %s\n", name->name);
4940 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4941 dprintk("NFS reply secinfo: %d\n", status);
4942 return status;
4943}
4944
17280175
TM		 4945static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
4946 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 4947{
4948 struct nfs4_exception exception = { };
4949 int err;
4950 do {
4951 err = nfs4_handle_exception(NFS_SERVER(dir),
4952 _nfs4_proc_secinfo(dir, name, flavors),
4953 &exception);
4954 } while (exception.retry);
4955 return err;
4956}
4957
557134a3 4958#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4959/*
4960 * Check the exchange flags returned by the server for invalid flags, having
4961 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4962 * DS flags set.
4963 */
4964static int nfs4_check_cl_exchange_flags(u32 flags)
4965{
4966 if (flags & ~EXCHGID4_FLAG_MASK_R)
4967 goto out_inval;
4968 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4969 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4970 goto out_inval;
4971 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4972 goto out_inval;
4973 return NFS_OK;
4974out_inval:
4975 return -NFS4ERR_INVAL;
4976}
4977
78fe0f41
WAA		 4978static bool
4979nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4980{
4981 if (a->server_scope_sz == b->server_scope_sz &&
4982 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4983 return true;
4984
4985 return false;
4986}
4987
99fe60d0
BH		 4988/*
4989 * nfs4_proc_exchange_id()
4990 *
4991 * Since the clientid has expired, all compounds using sessions
4992 * associated with the stale clientid will be returning
4993 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4994 * be in some phase of session reset.
4995 */
4d643d1d 4996int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4997{
4998 nfs4_verifier verifier;
4999 struct nfs41_exchange_id_args args = {
cd93710e 5000 .verifier = &verifier,
99fe60d0 5001 .client = clp,
357f54d6 5002 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5003 };
5004 struct nfs41_exchange_id_res res = {
5005 .client = clp,
5006 };
5007 int status;
5008 struct rpc_message msg = {
5009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5010 .rpc_argp = &args,
5011 .rpc_resp = &res,
5012 .rpc_cred = cred,
5013 };
99fe60d0
BH		 5014
5015 dprintk("--> %s\n", __func__);
5016 BUG_ON(clp == NULL);
a7b72103 5017
cd93710e 5018 nfs4_construct_boot_verifier(clp, &verifier);
99fe60d0 5019
c7a360b0
AA		 5020 args.id_len = scnprintf(args.id, sizeof(args.id),
5021 "%s/%s.%s/%u",
5022 clp->cl_ipaddr,
5023 init_utsname()->nodename,
5024 init_utsname()->domainname,
5025 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 5026
78fe0f41 5027 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
9edbd953
WAA		 5028 if (unlikely(!res.server_scope)) {
5029 status = -ENOMEM;
5030 goto out;
5031 }
78fe0f41 5032
7d2ed9ac
WAA		 5033 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5034 if (unlikely(!res.impl_id)) {
5035 status = -ENOMEM;
5036 goto out_server_scope;
5037 }
5038
1bd714f2 5039 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 5040 if (!status)
5041 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41 5042
7d2ed9ac
WAA		 5043 if (!status) {
5044 /* use the most recent implementation id */
5045 kfree(clp->impl_id);
5046 clp->impl_id = res.impl_id;
5047 } else
5048 kfree(res.impl_id);
5049
78fe0f41
WAA		 5050 if (!status) {
5051 if (clp->server_scope &&
5052 !nfs41_same_server_scope(clp->server_scope,
5053 res.server_scope)) {
5054 dprintk("%s: server_scope mismatch detected\n",
5055 __func__);
5056 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5057 kfree(clp->server_scope);
5058 clp->server_scope = NULL;
5059 }
5060
9edbd953 5061 if (!clp->server_scope) {
78fe0f41 5062 clp->server_scope = res.server_scope;
9edbd953
WAA		 5063 goto out;
5064 }
78fe0f41 5065 }
7d2ed9ac
WAA		 5066
5067out_server_scope:
9edbd953
WAA		 5068 kfree(res.server_scope);
5069out:
7d2ed9ac
WAA		 5070 if (clp->impl_id)
5071 dprintk("%s: Server Implementation ID: "
5072 "domain: %s, name: %s, date: %llu,%u\n",
5073 __func__, clp->impl_id->domain, clp->impl_id->name,
5074 clp->impl_id->date.seconds,
5075 clp->impl_id->date.nseconds);
99fe60d0
BH		 5076 dprintk("<-- %s status= %d\n", __func__, status);
5077 return status;
5078}
5079
2050f0cc
AA		 5080struct nfs4_get_lease_time_data {
5081 struct nfs4_get_lease_time_args *args;
5082 struct nfs4_get_lease_time_res *res;
5083 struct nfs_client *clp;
5084};
5085
5086static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5087 void *calldata)
5088{
5089 int ret;
5090 struct nfs4_get_lease_time_data *data =
5091 (struct nfs4_get_lease_time_data *)calldata;
5092
5093 dprintk("--> %s\n", __func__);
689cf5c1 5094 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5095 /* just setup sequence, do not trigger session recovery
5096 since we're invoked within one */
5097 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5098 &data->args->la_seq_args,
9d12b216 5099 &data->res->lr_seq_res, task);
2050f0cc
AA		 5100
5101 BUG_ON(ret == -EAGAIN);
5102 rpc_call_start(task);
5103 dprintk("<-- %s\n", __func__);
5104}
5105
5106/*
5107 * Called from nfs4_state_manager thread for session setup, so don't recover
5108 * from sequence operation or clientid errors.
5109 */
5110static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5111{
5112 struct nfs4_get_lease_time_data *data =
5113 (struct nfs4_get_lease_time_data *)calldata;
5114
5115 dprintk("--> %s\n", __func__);
14516c3a
TM		 5116 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5117 return;
2050f0cc
AA		 5118 switch (task->tk_status) {
5119 case -NFS4ERR_DELAY:
5120 case -NFS4ERR_GRACE:
5121 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5122 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5123 task->tk_status = 0;
a8a4ae3a
AA		 5124 /* fall through */
5125 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5126 rpc_restart_call_prepare(task);
2050f0cc
AA		 5127 return;
5128 }
2050f0cc
AA		 5129 dprintk("<-- %s\n", __func__);
5130}
5131
17280175 5132static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5133 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5134 .rpc_call_done = nfs4_get_lease_time_done,
5135};
5136
5137int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5138{
5139 struct rpc_task *task;
5140 struct nfs4_get_lease_time_args args;
5141 struct nfs4_get_lease_time_res res = {
5142 .lr_fsinfo = fsinfo,
5143 };
5144 struct nfs4_get_lease_time_data data = {
5145 .args = &args,
5146 .res = &res,
5147 .clp = clp,
5148 };
5149 struct rpc_message msg = {
5150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5151 .rpc_argp = &args,
5152 .rpc_resp = &res,
5153 };
5154 struct rpc_task_setup task_setup = {
5155 .rpc_client = clp->cl_rpcclient,
5156 .rpc_message = &msg,
5157 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5158 .callback_data = &data,
5159 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5160 };
5161 int status;
5162
9d12b216 5163 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5164 dprintk("--> %s\n", __func__);
5165 task = rpc_run_task(&task_setup);
5166
5167 if (IS_ERR(task))
5168 status = PTR_ERR(task);
5169 else {
5170 status = task->tk_status;
5171 rpc_put_task(task);
5172 }
5173 dprintk("<-- %s return %d\n", __func__, status);
5174
5175 return status;
5176}
5177
f86f36a6
TM		 5178static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5179{
5180 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5181}
5182
5183static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5184 struct nfs4_slot *new,
5185 u32 max_slots,
5186 u32 ivalue)
5187{
5188 struct nfs4_slot *old = NULL;
5189 u32 i;
5190
5191 spin_lock(&tbl->slot_tbl_lock);
5192 if (new) {
5193 old = tbl->slots;
5194 tbl->slots = new;
5195 tbl->max_slots = max_slots;
5196 }
5197 tbl->highest_used_slotid = -1; /* no slot is currently used */
5198 for (i = 0; i < tbl->max_slots; i++)
5199 tbl->slots[i].seq_nr = ivalue;
5200 spin_unlock(&tbl->slot_tbl_lock);
5201 kfree(old);
5202}
5203
b73dafa7 5204/*
f86f36a6 5205 * (re)Initialise a slot table
b73dafa7 5206 */
f86f36a6
TM		 5207static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5208 u32 ivalue)
ac72b7b3 5209{
104aeba4 5210 struct nfs4_slot *new = NULL;
f86f36a6 5211 int ret = -ENOMEM;
ac72b7b3 5212
104aeba4
AA		 5213 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5214 max_reqs, tbl->max_slots);
ac72b7b3 5215
104aeba4
AA		 5216 /* Does the newly negotiated max_reqs match the existing slot table? */
5217 if (max_reqs != tbl->max_slots) {
f86f36a6 5218 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5219 if (!new)
5220 goto out;
104aeba4 5221 }
f86f36a6
TM		 5222 ret = 0;
5223
5224 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5225 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5226 tbl, tbl->slots, tbl->max_slots);
5227out:
5228 dprintk("<-- %s: return %d\n", __func__, ret);
5229 return ret;
5230}
5231
f8625a6a
RL		 5232/* Destroy the slot table */
5233static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5234{
5235 if (session->fc_slot_table.slots != NULL) {
5236 kfree(session->fc_slot_table.slots);
5237 session->fc_slot_table.slots = NULL;
5238 }
5239 if (session->bc_slot_table.slots != NULL) {
5240 kfree(session->bc_slot_table.slots);
5241 session->bc_slot_table.slots = NULL;
5242 }
5243 return;
5244}
5245
050047ce 5246/*
aacd5537 5247 * Initialize or reset the forechannel and backchannel tables
050047ce 5248 */
aacd5537 5249static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5250{
f26468fb 5251 struct nfs4_slot_table *tbl;
aacd5537 5252 int status;
050047ce 5253
aacd5537
AA		 5254 dprintk("--> %s\n", __func__);
5255 /* Fore channel */
5256 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5257 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5258 if (status) /* -ENOMEM */
5259 return status;
aacd5537
AA		 5260 /* Back channel */
5261 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5262 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5263 if (status && tbl->slots == NULL)
5264 /* Fore and back channel share a connection so get
5265 * both slot tables or neither */
5266 nfs4_destroy_slot_tables(ses);
f8625a6a 5267 return status;
557134a3
AA		 5268}
5269
5270struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5271{
5272 struct nfs4_session *session;
5273 struct nfs4_slot_table *tbl;
5274
8535b2be 5275 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5276 if (!session)
5277 return NULL;
76db6d95 5278
557134a3 5279 tbl = &session->fc_slot_table;
45d43c29 5280 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5281 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5282 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5283 init_completion(&tbl->complete);
f8625a6a
RL		 5284
5285 tbl = &session->bc_slot_table;
45d43c29 5286 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5287 spin_lock_init(&tbl->slot_tbl_lock);
5288 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5289 init_completion(&tbl->complete);
f8625a6a 5290
1055d76d
TM		 5291 session->session_state = 1<<NFS4_SESSION_INITING;
5292
557134a3
AA		 5293 session->clp = clp;
5294 return session;
5295}
5296
5297void nfs4_destroy_session(struct nfs4_session *session)
5298{
2446ab60
TM		 5299 struct rpc_xprt *xprt;
5300
5a0ffe54 5301 nfs4_proc_destroy_session(session);
2446ab60
TM		 5302
5303 rcu_read_lock();
5304 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5305 rcu_read_unlock();
5a0ffe54 5306 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5307 __func__, xprt);
5308 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5309 nfs4_destroy_slot_tables(session);
557134a3
AA		 5310 kfree(session);
5311}
5312
fc931582
AA		 5313/*
5314 * Initialize the values to be used by the client in CREATE_SESSION
5315 * If nfs4_init_session set the fore channel request and response sizes,
5316 * use them.
5317 *
5318 * Set the back channel max_resp_sz_cached to zero to force the client to
5319 * always set csa_cachethis to FALSE because the current implementation
5320 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5321 */
5322static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5323{
5324 struct nfs4_session *session = args->client->cl_session;
5325 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5326 mxresp_sz = session->fc_attrs.max_resp_sz;
5327
5328 if (mxrqst_sz == 0)
5329 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5330 if (mxresp_sz == 0)
5331 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5332 /* Fore channel attributes */
fc931582
AA		 5333 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5334 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5335 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5336 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5337
5338 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5339 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5340 __func__,
5341 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5342 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5343
5344 /* Back channel attributes */
fc931582
AA		 5345 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5346 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5347 args->bc_attrs.max_resp_sz_cached = 0;
5348 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5349 args->bc_attrs.max_reqs = 1;
5350
5351 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5352 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5353 __func__,
5354 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5355 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5356 args->bc_attrs.max_reqs);
5357}
5358
43c2e885 5359static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5360{
43c2e885
BF		 5361 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5362 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5363
43c2e885
BF		 5364 if (rcvd->max_resp_sz > sent->max_resp_sz)
5365 return -EINVAL;
5366 /*
5367 * Our requested max_ops is the minimum we need; we're not
5368 * prepared to break up compounds into smaller pieces than that.
5369 * So, no point even trying to continue if the server won't
5370 * cooperate:
5371 */
5372 if (rcvd->max_ops < sent->max_ops)
5373 return -EINVAL;
5374 if (rcvd->max_reqs == 0)
5375 return -EINVAL;
b4b9a0c1
VG		 5376 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5377 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5378 return 0;
8d35301d
AA		 5379}
5380
43c2e885
BF		 5381static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5382{
5383 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5384 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5385
43c2e885
BF		 5386 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5387 return -EINVAL;
5388 if (rcvd->max_resp_sz < sent->max_resp_sz)
5389 return -EINVAL;
5390 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5391 return -EINVAL;
5392 /* These would render the backchannel useless: */
b4b9a0c1 5393 if (rcvd->max_ops != sent->max_ops)
43c2e885 5394 return -EINVAL;
b4b9a0c1 5395 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5396 return -EINVAL;
5397 return 0;
5398}
8d35301d 5399
8d35301d
AA		 5400static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5401 struct nfs4_session *session)
5402{
43c2e885 5403 int ret;
8d35301d 5404
43c2e885
BF		 5405 ret = nfs4_verify_fore_channel_attrs(args, session);
5406 if (ret)
5407 return ret;
5408 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5409}
5410
fc931582
AA		 5411static int _nfs4_proc_create_session(struct nfs_client *clp)
5412{
5413 struct nfs4_session *session = clp->cl_session;
5414 struct nfs41_create_session_args args = {
5415 .client = clp,
5416 .cb_program = NFS4_CALLBACK,
5417 };
5418 struct nfs41_create_session_res res = {
5419 .client = clp,
5420 };
5421 struct rpc_message msg = {
5422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5423 .rpc_argp = &args,
5424 .rpc_resp = &res,
5425 };
5426 int status;
5427
5428 nfs4_init_channel_attrs(&args);
0f91421e 5429 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5430
1bd714f2 5431 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5432
8d35301d
AA		 5433 if (!status)
5434 /* Verify the session's negotiated channel_attrs values */
5435 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5436 if (!status) {
5437 /* Increment the clientid slot sequence id */
5438 clp->cl_seqid++;
5439 }
5440
5441 return status;
5442}
5443
5444/*
5445 * Issues a CREATE_SESSION operation to the server.
5446 * It is the responsibility of the caller to verify the session is
5447 * expired before calling this routine.
5448 */
f26468fb 5449int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5450{
5451 int status;
5452 unsigned *ptr;
fc931582
AA		 5453 struct nfs4_session *session = clp->cl_session;
5454
5455 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5456
fd954ae1 5457 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5458 if (status)
5459 goto out;
5460
aacd5537
AA		 5461 /* Init or reset the session slot tables */
5462 status = nfs4_setup_session_slot_tables(session);
5463 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5464 if (status)
5465 goto out;
5466
5467 ptr = (unsigned *)&session->sess_id.data[0];
5468 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5469 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5470out:
5471 dprintk("<-- %s\n", __func__);
5472 return status;
5473}
5474
0f3e66c6
AA		 5475/*
5476 * Issue the over-the-wire RPC DESTROY_SESSION.
5477 * The caller must serialize access to this routine.
5478 */
5479int nfs4_proc_destroy_session(struct nfs4_session *session)
5480{
5481 int status = 0;
5482 struct rpc_message msg;
5483
5484 dprintk("--> nfs4_proc_destroy_session\n");
5485
5486 /* session is still being setup */
5487 if (session->clp->cl_cons_state != NFS_CS_READY)
5488 return status;
5489
5490 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5491 msg.rpc_argp = session;
5492 msg.rpc_resp = NULL;
5493 msg.rpc_cred = NULL;
1bd714f2 5494 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5495
5496 if (status)
5497 printk(KERN_WARNING
f9fd2d9c 5498 "NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5499 "Session has been destroyed regardless...\n", status);
5500
5501 dprintk("<-- nfs4_proc_destroy_session\n");
5502 return status;
5503}
5504
fccba804
TM		 5505int nfs4_init_session(struct nfs_server *server)
5506{
5507 struct nfs_client *clp = server->nfs_client;
2449ea2e 5508 struct nfs4_session *session;
68bf05ef 5509 unsigned int rsize, wsize;
fccba804
TM		 5510 int ret;
5511
5512 if (!nfs4_has_session(clp))
5513 return 0;
5514
1055d76d
TM		 5515 session = clp->cl_session;
5516 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5517 return 0;
5518
68bf05ef
AA		 5519 rsize = server->rsize;
5520 if (rsize == 0)
5521 rsize = NFS_MAX_FILE_IO_SIZE;
5522 wsize = server->wsize;
5523 if (wsize == 0)
5524 wsize = NFS_MAX_FILE_IO_SIZE;
5525
68bf05ef
AA		 5526 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5527 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5528
fccba804
TM		 5529 ret = nfs4_recover_expired_lease(server);
5530 if (!ret)
5531 ret = nfs4_check_client_ready(clp);
5532 return ret;
5533}
5534
d83217c1
AA		 5535int nfs4_init_ds_session(struct nfs_client *clp)
5536{
5537 struct nfs4_session *session = clp->cl_session;
5538 int ret;
5539
5540 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5541 return 0;
5542
5543 ret = nfs4_client_recover_expired_lease(clp);
5544 if (!ret)
5545 /* Test for the DS role */
5546 if (!is_ds_client(clp))
5547 ret = -ENODEV;
5548 if (!ret)
5549 ret = nfs4_check_client_ready(clp);
5550 return ret;
5551
5552}
5553EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5554
5555
fc01cea9
AA		 5556/*
5557 * Renew the cl_session lease.
5558 */
d5f8d3fe
TM		 5559struct nfs4_sequence_data {
5560 struct nfs_client *clp;
5561 struct nfs4_sequence_args args;
5562 struct nfs4_sequence_res res;
5563};
5564
dc96aef9
AB		 5565static void nfs41_sequence_release(void *data)
5566{
d5f8d3fe
TM		 5567 struct nfs4_sequence_data *calldata = data;
5568 struct nfs_client *clp = calldata->clp;
dc96aef9 5569
7135840f
AB		 5570 if (atomic_read(&clp->cl_count) > 1)
5571 nfs4_schedule_state_renewal(clp);
5572 nfs_put_client(clp);
d5f8d3fe 5573 kfree(calldata);
dc96aef9
AB		 5574}
5575
aa5190d0
TM		 5576static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5577{
5578 switch(task->tk_status) {
5579 case -NFS4ERR_DELAY:
aa5190d0
TM		 5580 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5581 return -EAGAIN;
5582 default:
0400a6b0 5583 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5584 }
5585 return 0;
5586}
5587
dc96aef9 5588static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5589{
d5f8d3fe
TM		 5590 struct nfs4_sequence_data *calldata = data;
5591 struct nfs_client *clp = calldata->clp;
fc01cea9 5592
14516c3a
TM		 5593 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5594 return;
fc01cea9
AA		 5595
5596 if (task->tk_status < 0) {
5597 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5598 if (atomic_read(&clp->cl_count) == 1)
5599 goto out;
fc01cea9 5600
aa5190d0
TM		 5601 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5602 rpc_restart_call_prepare(task);
fc01cea9
AA		 5603 return;
5604 }
5605 }
fc01cea9 5606 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5607out:
fc01cea9
AA		 5608 dprintk("<-- %s\n", __func__);
5609}
5610
5611static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5612{
d5f8d3fe
TM		 5613 struct nfs4_sequence_data *calldata = data;
5614 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5615 struct nfs4_sequence_args *args;
5616 struct nfs4_sequence_res *res;
5617
fc01cea9
AA		 5618 args = task->tk_msg.rpc_argp;
5619 res = task->tk_msg.rpc_resp;
5620
9d12b216 5621 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5622 return;
5623 rpc_call_start(task);
5624}
5625
5626static const struct rpc_call_ops nfs41_sequence_ops = {
5627 .rpc_call_done = nfs41_sequence_call_done,
5628 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5629 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5630};
5631
71ac6da9 5632static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5633{
d5f8d3fe 5634 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5635 struct rpc_message msg = {
5636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5637 .rpc_cred = cred,
5638 };
71ac6da9
TM		 5639 struct rpc_task_setup task_setup_data = {
5640 .rpc_client = clp->cl_rpcclient,
5641 .rpc_message = &msg,
5642 .callback_ops = &nfs41_sequence_ops,
5643 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5644 };
fc01cea9 5645
7135840f 5646 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5647 return ERR_PTR(-EIO);
dfb4f309 5648 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5649 if (calldata == NULL) {
7135840f 5650 nfs_put_client(clp);
71ac6da9 5651 return ERR_PTR(-ENOMEM);
fc01cea9 5652 }
9d12b216 5653 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5654 msg.rpc_argp = &calldata->args;
5655 msg.rpc_resp = &calldata->res;
5656 calldata->clp = clp;
71ac6da9 5657 task_setup_data.callback_data = calldata;
fc01cea9 5658
71ac6da9
TM		 5659 return rpc_run_task(&task_setup_data);
5660}
5661
2f60ea6b 5662static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5663{
5664 struct rpc_task *task;
5665 int ret = 0;
5666
2f60ea6b
TM		 5667 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5668 return 0;
71ac6da9
TM		 5669 task = _nfs41_proc_sequence(clp, cred);
5670 if (IS_ERR(task))
5671 ret = PTR_ERR(task);
5672 else
bf294b41 5673 rpc_put_task_async(task);
71ac6da9
TM		 5674 dprintk("<-- %s status=%d\n", __func__, ret);
5675 return ret;
5676}
5677
5678static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5679{
5680 struct rpc_task *task;
5681 int ret;
5682
5683 task = _nfs41_proc_sequence(clp, cred);
5684 if (IS_ERR(task)) {
5685 ret = PTR_ERR(task);
5686 goto out;
5687 }
5688 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5689 if (!ret) {
5690 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5691
5692 if (task->tk_status == 0)
5693 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5694 ret = task->tk_status;
b4410c2f 5695 }
71ac6da9
TM		 5696 rpc_put_task(task);
5697out:
5698 dprintk("<-- %s status=%d\n", __func__, ret);
5699 return ret;
fc01cea9
AA		 5700}
5701
fce5c838
RL		 5702struct nfs4_reclaim_complete_data {
5703 struct nfs_client *clp;
5704 struct nfs41_reclaim_complete_args arg;
5705 struct nfs41_reclaim_complete_res res;
5706};
5707
5708static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5709{
5710 struct nfs4_reclaim_complete_data *calldata = data;
5711
b257957e 5712 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5713 if (nfs41_setup_sequence(calldata->clp->cl_session,
5714 &calldata->arg.seq_args,
9d12b216 5715 &calldata->res.seq_res, task))
fce5c838
RL		 5716 return;
5717
5718 rpc_call_start(task);
5719}
5720
aa5190d0
TM		 5721static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5722{
5723 switch(task->tk_status) {
5724 case 0:
5725 case -NFS4ERR_COMPLETE_ALREADY:
5726 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5727 break;
5728 case -NFS4ERR_DELAY:
aa5190d0 5729 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5730 /* fall through */
5731 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5732 return -EAGAIN;
5733 default:
0400a6b0 5734 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5735 }
5736 return 0;
5737}
5738
fce5c838
RL		 5739static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5740{
5741 struct nfs4_reclaim_complete_data *calldata = data;
5742 struct nfs_client *clp = calldata->clp;
5743 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5744
5745 dprintk("--> %s\n", __func__);
14516c3a
TM		 5746 if (!nfs41_sequence_done(task, res))
5747 return;
fce5c838 5748
aa5190d0
TM		 5749 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5750 rpc_restart_call_prepare(task);
5751 return;
5752 }
fce5c838
RL		 5753 dprintk("<-- %s\n", __func__);
5754}
5755
5756static void nfs4_free_reclaim_complete_data(void *data)
5757{
5758 struct nfs4_reclaim_complete_data *calldata = data;
5759
5760 kfree(calldata);
5761}
5762
5763static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5764 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5765 .rpc_call_done = nfs4_reclaim_complete_done,
5766 .rpc_release = nfs4_free_reclaim_complete_data,
5767};
5768
5769/*
5770 * Issue a global reclaim complete.
5771 */
5772static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5773{
5774 struct nfs4_reclaim_complete_data *calldata;
5775 struct rpc_task *task;
5776 struct rpc_message msg = {
5777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5778 };
5779 struct rpc_task_setup task_setup_data = {
5780 .rpc_client = clp->cl_rpcclient,
5781 .rpc_message = &msg,
5782 .callback_ops = &nfs4_reclaim_complete_call_ops,
5783 .flags = RPC_TASK_ASYNC,
5784 };
5785 int status = -ENOMEM;
5786
5787 dprintk("--> %s\n", __func__);
8535b2be 5788 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5789 if (calldata == NULL)
5790 goto out;
5791 calldata->clp = clp;
5792 calldata->arg.one_fs = 0;
fce5c838 5793
9d12b216 5794 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5795 msg.rpc_argp = &calldata->arg;
5796 msg.rpc_resp = &calldata->res;
5797 task_setup_data.callback_data = calldata;
5798 task = rpc_run_task(&task_setup_data);
acf82b85 5799 if (IS_ERR(task)) {
fce5c838 5800 status = PTR_ERR(task);
acf82b85
DC		 5801 goto out;
5802 }
c34c32ea
AA		 5803 status = nfs4_wait_for_completion_rpc_task(task);
5804 if (status == 0)
5805 status = task->tk_status;
fce5c838 5806 rpc_put_task(task);
acf82b85 5807 return 0;
fce5c838
RL		 5808out:
5809 dprintk("<-- %s status=%d\n", __func__, status);
5810 return status;
5811}
b1f69b75
AA		 5812
5813static void
5814nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5815{
5816 struct nfs4_layoutget *lgp = calldata;
c31663d4 5817 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5818
5819 dprintk("--> %s\n", __func__);
c31663d4
FI		 5820 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5821 * right now covering the LAYOUTGET we are about to send.
5822 * However, that is not so catastrophic, and there seems
5823 * to be no way to prevent it completely.
5824 */
b1f69b75 5825 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 5826 &lgp->res.seq_res, task))
b1f69b75 5827 return;
cf7d63f1
FI		 5828 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5829 NFS_I(lgp->args.inode)->layout,
5830 lgp->args.ctx->state)) {
5831 rpc_exit(task, NFS4_OK);
5832 return;
5833 }
b1f69b75
AA		 5834 rpc_call_start(task);
5835}
5836
5837static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5838{
5839 struct nfs4_layoutget *lgp = calldata;
5840 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5841
5842 dprintk("--> %s\n", __func__);
5843
5844 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5845 return;
5846
5847 switch (task->tk_status) {
5848 case 0:
5849 break;
5850 case -NFS4ERR_LAYOUTTRYLATER:
5851 case -NFS4ERR_RECALLCONFLICT:
5852 task->tk_status = -NFS4ERR_DELAY;
5853 /* Fall through */
5854 default:
5855 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5856 rpc_restart_call_prepare(task);
5857 return;
5858 }
5859 }
b1f69b75
AA		 5860 dprintk("<-- %s\n", __func__);
5861}
5862
5863static void nfs4_layoutget_release(void *calldata)
5864{
5865 struct nfs4_layoutget *lgp = calldata;
5866
5867 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5868 put_nfs_open_context(lgp->args.ctx);
5869 kfree(calldata);
5870 dprintk("<-- %s\n", __func__);
5871}
5872
5873static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5874 .rpc_call_prepare = nfs4_layoutget_prepare,
5875 .rpc_call_done = nfs4_layoutget_done,
5876 .rpc_release = nfs4_layoutget_release,
5877};
5878
5879int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5880{
5881 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5882 struct rpc_task *task;
5883 struct rpc_message msg = {
5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5885 .rpc_argp = &lgp->args,
5886 .rpc_resp = &lgp->res,
5887 };
5888 struct rpc_task_setup task_setup_data = {
5889 .rpc_client = server->client,
5890 .rpc_message = &msg,
5891 .callback_ops = &nfs4_layoutget_call_ops,
5892 .callback_data = lgp,
5893 .flags = RPC_TASK_ASYNC,
5894 };
5895 int status = 0;
5896
5897 dprintk("--> %s\n", __func__);
5898
35124a09 5899 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 5900 lgp->res.seq_res.sr_slot = NULL;
9d12b216 5901 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 5902 task = rpc_run_task(&task_setup_data);
5903 if (IS_ERR(task))
5904 return PTR_ERR(task);
5905 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5906 if (status == 0)
5907 status = task->tk_status;
5908 if (status == 0)
5909 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5910 rpc_put_task(task);
5911 dprintk("<-- %s status=%d\n", __func__, status);
5912 return status;
5913}
5914
cbe82603
BH		 5915static void
5916nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5917{
5918 struct nfs4_layoutreturn *lrp = calldata;
5919
5920 dprintk("--> %s\n", __func__);
5921 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 5922 &lrp->res.seq_res, task))
cbe82603
BH		 5923 return;
5924 rpc_call_start(task);
5925}
5926
5927static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5928{
5929 struct nfs4_layoutreturn *lrp = calldata;
5930 struct nfs_server *server;
a56aaa02 5931 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5932
5933 dprintk("--> %s\n", __func__);
5934
5935 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5936 return;
5937
5938 server = NFS_SERVER(lrp->args.inode);
5939 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 5940 rpc_restart_call_prepare(task);
cbe82603
BH		 5941 return;
5942 }
a2e1d4f2 5943 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5944 if (task->tk_status == 0) {
cbe82603 5945 if (lrp->res.lrs_present) {
cbe82603 5946 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5947 } else
5948 BUG_ON(!list_empty(&lo->plh_segs));
5949 }
a2e1d4f2
FI		 5950 lo->plh_block_lgets--;
5951 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5952 dprintk("<-- %s\n", __func__);
5953}
5954
5955static void nfs4_layoutreturn_release(void *calldata)
5956{
5957 struct nfs4_layoutreturn *lrp = calldata;
5958
5959 dprintk("--> %s\n", __func__);
a56aaa02 5960 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5961 kfree(calldata);
5962 dprintk("<-- %s\n", __func__);
5963}
5964
5965static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5966 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5967 .rpc_call_done = nfs4_layoutreturn_done,
5968 .rpc_release = nfs4_layoutreturn_release,
5969};
5970
5971int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5972{
5973 struct rpc_task *task;
5974 struct rpc_message msg = {
5975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5976 .rpc_argp = &lrp->args,
5977 .rpc_resp = &lrp->res,
5978 };
5979 struct rpc_task_setup task_setup_data = {
5980 .rpc_client = lrp->clp->cl_rpcclient,
5981 .rpc_message = &msg,
5982 .callback_ops = &nfs4_layoutreturn_call_ops,
5983 .callback_data = lrp,
5984 };
5985 int status;
5986
5987 dprintk("--> %s\n", __func__);
9d12b216 5988 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 5989 task = rpc_run_task(&task_setup_data);
5990 if (IS_ERR(task))
5991 return PTR_ERR(task);
5992 status = task->tk_status;
5993 dprintk("<-- %s status=%d\n", __func__, status);
5994 rpc_put_task(task);
5995 return status;
5996}
5997
7f11d8d3
AA		 5998/*
5999 * Retrieve the list of Data Server devices from the MDS.
6000 */
6001static int _nfs4_getdevicelist(struct nfs_server *server,
6002 const struct nfs_fh *fh,
6003 struct pnfs_devicelist *devlist)
6004{
6005 struct nfs4_getdevicelist_args args = {
6006 .fh = fh,
6007 .layoutclass = server->pnfs_curr_ld->id,
6008 };
6009 struct nfs4_getdevicelist_res res = {
6010 .devlist = devlist,
6011 };
6012 struct rpc_message msg = {
6013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6014 .rpc_argp = &args,
6015 .rpc_resp = &res,
6016 };
6017 int status;
6018
6019 dprintk("--> %s\n", __func__);
6020 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6021 &res.seq_res, 0);
6022 dprintk("<-- %s status=%d\n", __func__, status);
6023 return status;
6024}
6025
6026int nfs4_proc_getdevicelist(struct nfs_server *server,
6027 const struct nfs_fh *fh,
6028 struct pnfs_devicelist *devlist)
6029{
6030 struct nfs4_exception exception = { };
6031 int err;
6032
6033 do {
6034 err = nfs4_handle_exception(server,
6035 _nfs4_getdevicelist(server, fh, devlist),
6036 &exception);
6037 } while (exception.retry);
6038
6039 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6040 err, devlist->num_devs);
6041
6042 return err;
6043}
6044EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6045
b1f69b75
AA		 6046static int
6047_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6048{
6049 struct nfs4_getdeviceinfo_args args = {
6050 .pdev = pdev,
6051 };
6052 struct nfs4_getdeviceinfo_res res = {
6053 .pdev = pdev,
6054 };
6055 struct rpc_message msg = {
6056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6057 .rpc_argp = &args,
6058 .rpc_resp = &res,
6059 };
6060 int status;
6061
6062 dprintk("--> %s\n", __func__);
7c513058 6063 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6064 dprintk("<-- %s status=%d\n", __func__, status);
6065
6066 return status;
6067}
6068
6069int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6070{
6071 struct nfs4_exception exception = { };
6072 int err;
6073
6074 do {
6075 err = nfs4_handle_exception(server,
6076 _nfs4_proc_getdeviceinfo(server, pdev),
6077 &exception);
6078 } while (exception.retry);
6079 return err;
6080}
6081EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6082
863a3c6c
AA		 6083static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6084{
6085 struct nfs4_layoutcommit_data *data = calldata;
6086 struct nfs_server *server = NFS_SERVER(data->args.inode);
6087
6088 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6089 &data->res.seq_res, task))
863a3c6c
AA		 6090 return;
6091 rpc_call_start(task);
6092}
6093
6094static void
6095nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6096{
6097 struct nfs4_layoutcommit_data *data = calldata;
6098 struct nfs_server *server = NFS_SERVER(data->args.inode);
6099
6100 if (!nfs4_sequence_done(task, &data->res.seq_res))
6101 return;
6102
6103 switch (task->tk_status) { /* Just ignore these failures */
6104 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6105 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6106 case NFS4ERR_BADLAYOUT: /* no layout */
6107 case NFS4ERR_GRACE: /* loca_recalim always false */
6108 task->tk_status = 0;
6109 }
6110
6111 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6112 rpc_restart_call_prepare(task);
863a3c6c
AA		 6113 return;
6114 }
6115
6116 if (task->tk_status == 0)
6117 nfs_post_op_update_inode_force_wcc(data->args.inode,
6118 data->res.fattr);
6119}
6120
6121static void nfs4_layoutcommit_release(void *calldata)
6122{
6123 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6124 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6125 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6126
db29c089 6127 pnfs_cleanup_layoutcommit(data);
863a3c6c 6128 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6129 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6130 list_del_init(&lseg->pls_lc_list);
6131 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6132 &lseg->pls_flags))
6133 put_lseg(lseg);
6134 }
92407e75
PT		 6135
6136 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6137 smp_mb__after_clear_bit();
6138 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6139
863a3c6c
AA		 6140 put_rpccred(data->cred);
6141 kfree(data);
6142}
6143
6144static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6145 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6146 .rpc_call_done = nfs4_layoutcommit_done,
6147 .rpc_release = nfs4_layoutcommit_release,
6148};
6149
6150int
ef311537 6151nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6152{
6153 struct rpc_message msg = {
6154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6155 .rpc_argp = &data->args,
6156 .rpc_resp = &data->res,
6157 .rpc_cred = data->cred,
6158 };
6159 struct rpc_task_setup task_setup_data = {
6160 .task = &data->task,
6161 .rpc_client = NFS_CLIENT(data->args.inode),
6162 .rpc_message = &msg,
6163 .callback_ops = &nfs4_layoutcommit_ops,
6164 .callback_data = data,
6165 .flags = RPC_TASK_ASYNC,
6166 };
6167 struct rpc_task *task;
6168 int status = 0;
6169
6170 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6171 "lbw: %llu inode %lu\n",
6172 data->task.tk_pid, sync,
6173 data->args.lastbytewritten,
6174 data->args.inode->i_ino);
6175
9d12b216 6176 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6177 task = rpc_run_task(&task_setup_data);
6178 if (IS_ERR(task))
6179 return PTR_ERR(task);
ef311537 6180 if (sync == false)
863a3c6c
AA		 6181 goto out;
6182 status = nfs4_wait_for_completion_rpc_task(task);
6183 if (status != 0)
6184 goto out;
6185 status = task->tk_status;
6186out:
6187 dprintk("%s: status %d\n", __func__, status);
6188 rpc_put_task(task);
6189 return status;
6190}
fca78d6d
BS		 6191
6192static int
6193_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6194 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6195{
6196 struct nfs41_secinfo_no_name_args args = {
6197 .style = SECINFO_STYLE_CURRENT_FH,
6198 };
6199 struct nfs4_secinfo_res res = {
6200 .flavors = flavors,
6201 };
6202 struct rpc_message msg = {
6203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6204 .rpc_argp = &args,
6205 .rpc_resp = &res,
6206 };
6207 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6208}
6209
6210static int
6211nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6212 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6213{
6214 struct nfs4_exception exception = { };
6215 int err;
6216 do {
6217 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6218 switch (err) {
6219 case 0:
6220 case -NFS4ERR_WRONGSEC:
6221 case -NFS4ERR_NOTSUPP:
6222 break;
6223 default:
6224 err = nfs4_handle_exception(server, err, &exception);
6225 }
6226 } while (exception.retry);
6227 return err;
6228}
6229
6230static int
6231nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6232 struct nfs_fsinfo *info)
6233{
6234 int err;
6235 struct page *page;
6236 rpc_authflavor_t flavor;
6237 struct nfs4_secinfo_flavors *flavors;
6238
6239 page = alloc_page(GFP_KERNEL);
6240 if (!page) {
6241 err = -ENOMEM;
6242 goto out;
6243 }
6244
6245 flavors = page_address(page);
6246 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6247
6248 /*
6249 * Fall back on "guess and check" method if
6250 * the server doesn't support SECINFO_NO_NAME
6251 */
6252 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6253 err = nfs4_find_root_sec(server, fhandle, info);
6254 goto out_freepage;
6255 }
6256 if (err)
6257 goto out_freepage;
6258
6259 flavor = nfs_find_best_sec(flavors);
6260 if (err == 0)
6261 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6262
6263out_freepage:
6264 put_page(page);
6265 if (err == -EACCES)
6266 return -EPERM;
6267out:
6268 return err;
6269}
1cab0652
BS		 6270
6271static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794 6272{
1cab0652 6273 int status;
7d974794 6274 struct nfs41_test_stateid_args args = {
1cab0652 6275 .stateid = stateid,
7d974794
BS		 6276 };
6277 struct nfs41_test_stateid_res res;
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6280 .rpc_argp = &args,
6281 .rpc_resp = &res,
6282 };
1cab0652 6283
9d12b216 6284 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652
BS		 6285 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6286
6287 if (status == NFS_OK)
6288 return res.status;
6289 return status;
7d974794
BS		 6290}
6291
1cab0652 6292static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6293{
6294 struct nfs4_exception exception = { };
6295 int err;
6296 do {
6297 err = nfs4_handle_exception(server,
1cab0652 6298 _nfs41_test_stateid(server, stateid),
7d974794
BS		 6299 &exception);
6300 } while (exception.retry);
6301 return err;
6302}
9aeda35f 6303
1cab0652 6304static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6305{
9aeda35f 6306 struct nfs41_free_stateid_args args = {
1cab0652 6307 .stateid = stateid,
9aeda35f
BS		 6308 };
6309 struct nfs41_free_stateid_res res;
6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6312 .rpc_argp = &args,
6313 .rpc_resp = &res,
6314 };
6315
9d12b216
TM		 6316 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6317 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
9aeda35f
BS		 6318}
6319
1cab0652 6320static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6321{
6322 struct nfs4_exception exception = { };
6323 int err;
6324 do {
6325 err = nfs4_handle_exception(server,
1cab0652 6326 _nfs4_free_stateid(server, stateid),
9aeda35f
BS		 6327 &exception);
6328 } while (exception.retry);
6329 return err;
6330}
36281caa
TM		 6331
6332static bool nfs41_match_stateid(const nfs4_stateid *s1,
6333 const nfs4_stateid *s2)
6334{
2d2f24ad 6335 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6336 return false;
6337
2d2f24ad 6338 if (s1->seqid == s2->seqid)
36281caa 6339 return true;
2d2f24ad 6340 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6341 return true;
6342
6343 return false;
6344}
6345
557134a3
AA		 6346#endif /* CONFIG_NFS_V4_1 */
6347
36281caa
TM		 6348static bool nfs4_match_stateid(const nfs4_stateid *s1,
6349 const nfs4_stateid *s2)
6350{
f597c537 6351 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6352}
6353
6354
17280175 6355static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6356 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6357 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6358 .recover_open = nfs4_open_reclaim,
6359 .recover_lock = nfs4_lock_reclaim,
591d71cb 6360 .establish_clid = nfs4_init_clientid,
90a16617 6361 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6362};
6363
591d71cb 6364#if defined(CONFIG_NFS_V4_1)
17280175 6365static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6366 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6367 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6368 .recover_open = nfs4_open_reclaim,
6369 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6370 .establish_clid = nfs41_init_clientid,
b4b82607 6371 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6372 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6373};
6374#endif /* CONFIG_NFS_V4_1 */
6375
17280175 6376static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6377 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6378 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6379 .recover_open = nfs4_open_expired,
6380 .recover_lock = nfs4_lock_expired,
6381 .establish_clid = nfs4_init_clientid,
90a16617 6382 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6383};
6384
6385#if defined(CONFIG_NFS_V4_1)
17280175 6386static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6387 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6388 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6389 .recover_open = nfs41_open_expired,
6390 .recover_lock = nfs41_lock_expired,
4d643d1d 6391 .establish_clid = nfs41_init_clientid,
b4b82607 6392 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6393};
591d71cb 6394#endif /* CONFIG_NFS_V4_1 */
1da177e4 6395
17280175 6396static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6397 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6398 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6399 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6400};
6401
6402#if defined(CONFIG_NFS_V4_1)
17280175 6403static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6404 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6405 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6406 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6407};
6408#endif
6409
97dc1359
TM		 6410static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6411 .minor_version = 0,
6412 .call_sync = _nfs4_call_sync,
36281caa 6413 .match_stateid = nfs4_match_stateid,
fca78d6d 6414 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6415 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6416 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6417 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6418};
6419
6420#if defined(CONFIG_NFS_V4_1)
6421static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6422 .minor_version = 1,
6423 .call_sync = _nfs4_call_sync_session,
36281caa 6424 .match_stateid = nfs41_match_stateid,
fca78d6d 6425 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6426 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6427 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6428 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6429};
6430#endif
6431
97dc1359
TM		 6432const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6433 [0] = &nfs_v4_0_minor_ops,
6434#if defined(CONFIG_NFS_V4_1)
6435 [1] = &nfs_v4_1_minor_ops,
6436#endif
6437};
6438
92e1d5be 6439static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6440 .permission = nfs_permission,
6441 .getattr = nfs_getattr,
6442 .setattr = nfs_setattr,
64c2ce8b
AK		 6443 .getxattr = generic_getxattr,
6444 .setxattr = generic_setxattr,
6445 .listxattr = generic_listxattr,
6446 .removexattr = generic_removexattr,
6b3b5496
BF		 6447};
6448
509de811 6449const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6450 .version = 4, /* protocol version */
6451 .dentry_ops = &nfs4_dentry_operations,
6452 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6453 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6454 .file_ops = &nfs4_file_operations,
1da177e4
LT		 6455 .getroot = nfs4_proc_get_root,
6456 .getattr = nfs4_proc_getattr,
6457 .setattr = nfs4_proc_setattr,
6458 .lookup = nfs4_proc_lookup,
6459 .access = nfs4_proc_access,
6460 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6461 .create = nfs4_proc_create,
6462 .remove = nfs4_proc_remove,
6463 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6464 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6465 .unlink_done = nfs4_proc_unlink_done,
6466 .rename = nfs4_proc_rename,
d3d4152a
JL		 6467 .rename_setup = nfs4_proc_rename_setup,
6468 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6469 .link = nfs4_proc_link,
6470 .symlink = nfs4_proc_symlink,
6471 .mkdir = nfs4_proc_mkdir,
6472 .rmdir = nfs4_proc_remove,
6473 .readdir = nfs4_proc_readdir,
6474 .mknod = nfs4_proc_mknod,
6475 .statfs = nfs4_proc_statfs,
6476 .fsinfo = nfs4_proc_fsinfo,
6477 .pathconf = nfs4_proc_pathconf,
e9326dca 6478 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6479 .decode_dirent = nfs4_decode_dirent,
6480 .read_setup = nfs4_proc_read_setup,
ea7c3303 6481 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6482 .read_done = nfs4_read_done,
1da177e4 6483 .write_setup = nfs4_proc_write_setup,
c6cb80d0 6484 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6485 .write_done = nfs4_write_done,
1da177e4 6486 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6487 .commit_done = nfs4_commit_done,
1da177e4 6488 .lock = nfs4_proc_lock,
e50a1c2e 6489 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6490 .close_context = nfs4_close_context,
2b484297 6491 .open_context = nfs4_atomic_open,
45a52a02 6492 .init_client = nfs4_init_client,
5a5ea0d4 6493 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6494};
6495
64c2ce8b
AK		 6496static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6497 .prefix = XATTR_NAME_NFSV4_ACL,
6498 .list = nfs4_xattr_list_nfs4_acl,
6499 .get = nfs4_xattr_get_nfs4_acl,
6500 .set = nfs4_xattr_set_nfs4_acl,
6501};
6502
6503const struct xattr_handler *nfs4_xattr_handlers[] = {
6504 &nfs4_xattr_nfs4_acl_handler,
6505 NULL
6506};
6507
ef159e91
TM		 6508module_param(max_session_slots, ushort, 0644);
6509MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6510 "requests the client will negotiate");
6511
1da177e4
LT		 6512/*
6513 * Local variables:
6514 * c-basic-offset: 8
6515 * End:
6516 */
Linux 6.x block layer and io_uring tree(s)