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NFSv4.1: Fix a race in the pNFS return-on-close 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
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
52567b03 107 default:
1da177e4 108 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 109 __func__, -err);
52567b03 110 break;
1da177e4 111 }
52567b03 112 return -EIO;
1da177e4
LT		 113}
114
115/*
116 * This is our standard bitmap for GETATTR requests.
117 */
1549210f 118const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 119 FATTR4_WORD0_TYPE
120 | FATTR4_WORD0_CHANGE
121 | FATTR4_WORD0_SIZE
122 | FATTR4_WORD0_FSID
123 | FATTR4_WORD0_FILEID,
124 FATTR4_WORD1_MODE
125 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
133};
134
1549210f
TM		 135static const u32 nfs4_pnfs_open_bitmap[3] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID,
141 FATTR4_WORD1_MODE
142 | FATTR4_WORD1_NUMLINKS
143 | FATTR4_WORD1_OWNER
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
151};
152
1da177e4
LT		 153const u32 nfs4_statfs_bitmap[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
160};
161
4ce79717 162const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 163 FATTR4_WORD0_MAXLINK
164 | FATTR4_WORD0_MAXNAME,
165 0
166};
167
dae100c2 168const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME,
55b6e774 172 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 173 | FATTR4_WORD1_FS_LAYOUT_TYPES,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 175};
176
830b8e33
MN		 177const u32 nfs4_fs_locations_bitmap[2] = {
178 FATTR4_WORD0_TYPE
179 | FATTR4_WORD0_CHANGE
180 | FATTR4_WORD0_SIZE
181 | FATTR4_WORD0_FSID
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
194};
195
bc4785cd 196static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 197 struct nfs4_readdir_arg *readdir)
198{
0dbb4c67 199 __be32 *start, *p;
1da177e4
LT		 200
201 BUG_ON(readdir->count < 80);
202 if (cookie > 2) {
b7ef1956 203 readdir->cookie = cookie;
1da177e4
LT		 204 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
205 return;
206 }
207
208 readdir->cookie = 0;
209 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
210 if (cookie == 2)
211 return;
212
213 /*
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
218 * instead of 1 or 2.
219 */
2b86ce2d 220 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 221
222 if (cookie == 0) {
223 *p++ = xdr_one; /* next */
224 *p++ = xdr_zero; /* cookie, first word */
225 *p++ = xdr_one; /* cookie, second word */
226 *p++ = xdr_one; /* entry len */
227 memcpy(p, ".\0\0\0", 4); /* entry */
228 p++;
229 *p++ = xdr_one; /* bitmap length */
230 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
231 *p++ = htonl(8); /* attribute buffer length */
4e769b93 232 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 233 }
234
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_two; /* cookie, second word */
238 *p++ = xdr_two; /* entry len */
239 memcpy(p, "..\0\0", 4); /* entry */
240 p++;
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
4e769b93 244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 245
246 readdir->pgbase = (char *)p - (char *)start;
247 readdir->count -= readdir->pgbase;
2b86ce2d 248 kunmap_atomic(start);
1da177e4
LT		 249}
250
65de872e
TM		 251static int nfs4_wait_clnt_recover(struct nfs_client *clp)
252{
253 int res;
254
255 might_sleep();
256
e005e804 257 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 258 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 259 if (res)
260 return res;
261
262 if (clp->cl_cons_state < 0)
263 return clp->cl_cons_state;
264 return 0;
65de872e
TM		 265}
266
267static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268{
269 int res = 0;
270
271 might_sleep();
272
273 if (*timeout <= 0)
274 *timeout = NFS4_POLL_RETRY_MIN;
275 if (*timeout > NFS4_POLL_RETRY_MAX)
276 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 277 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 278 if (fatal_signal_pending(current))
279 res = -ERESTARTSYS;
280 *timeout <<= 1;
281 return res;
282}
283
284/* This is the error handling routine for processes that are allowed
285 * to sleep.
286 */
b064eca2 287static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 288{
289 struct nfs_client *clp = server->nfs_client;
9e33bed5 290 struct nfs4_state *state = exception->state;
3114ea7a 291 struct inode *inode = exception->inode;
65de872e
TM		 292 int ret = errorcode;
293
294 exception->retry = 0;
295 switch(errorcode) {
296 case 0:
297 return 0;
3114ea7a 298 case -NFS4ERR_OPENMODE:
011e2a7f 299 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 300 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 301 exception->retry = 1;
302 return 0;
303 }
304 if (state == NULL)
305 break;
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
a1d0b5ee 308 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 309 case -NFS4ERR_ADMIN_REVOKED:
310 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 311 if (state == NULL)
312 break;
14977489 313 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
0ced63d1
TM		 316 case -NFS4ERR_EXPIRED:
317 if (state != NULL)
318 nfs4_schedule_stateid_recovery(server, state);
65de872e 319 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 320 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 321 nfs4_schedule_lease_recovery(clp);
322 goto wait_on_recovery;
03391693 323#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 324 case -NFS4ERR_BADSESSION:
325 case -NFS4ERR_BADSLOT:
326 case -NFS4ERR_BAD_HIGH_SLOT:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
328 case -NFS4ERR_DEADSESSION:
329 case -NFS4ERR_SEQ_FALSE_RETRY:
330 case -NFS4ERR_SEQ_MISORDERED:
331 dprintk("%s ERROR: %d Reset session\n", __func__,
332 errorcode);
9f594791 333 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 334 exception->retry = 1;
b9179237 335 break;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
2c643488 347 case -EKEYEXPIRED:
65de872e
TM		 348 ret = nfs4_delay(server->client, &exception->timeout);
349 if (ret != 0)
350 break;
a8a4ae3a 351 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 352 case -NFS4ERR_OLD_STATEID:
353 exception->retry = 1;
b064eca2
TM		 354 break;
355 case -NFS4ERR_BADOWNER:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME:
358 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
359 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
360 exception->retry = 1;
361 printk(KERN_WARNING "NFS: v4 server %s "
362 "does not accept raw "
363 "uid/gids. "
364 "Reenabling the idmapper.\n",
365 server->nfs_client->cl_hostname);
366 }
65de872e
TM		 367 }
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret);
0400a6b0 370wait_on_recovery:
a2c0b9e2
TM		 371 ret = nfs4_wait_clnt_recover(clp);
372 if (ret == 0)
373 exception->retry = 1;
374 return ret;
65de872e
TM		 375}
376
377
452e9352 378static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 379{
1da177e4
LT		 380 spin_lock(&clp->cl_lock);
381 if (time_before(clp->cl_last_renewal,timestamp))
382 clp->cl_last_renewal = timestamp;
383 spin_unlock(&clp->cl_lock);
384}
385
452e9352
TM		 386static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
387{
388 do_renew_lease(server->nfs_client, timestamp);
389}
390
cccef3b9
AA		 391#if defined(CONFIG_NFS_V4_1)
392
e2c4ab3c
AA		 393/*
394 * nfs4_free_slot - free a slot and efficiently update slot table.
395 *
396 * freeing a slot is trivially done by clearing its respective bit
397 * in the bitmap.
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
45d43c29 404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 405 *
406 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 407 */
408static void
45d43c29 409nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 410{
45d43c29 411 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 412 /* clear used bit in bitmap */
413 __clear_bit(slotid, tbl->used_slots);
414
415 /* update highest_used_slotid when it is freed */
416 if (slotid == tbl->highest_used_slotid) {
417 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 418 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 419 tbl->highest_used_slotid = slotid;
420 else
45d43c29 421 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 422 }
45d43c29
TM		 423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
424 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 425}
426
961a828d
TM		 427bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
428{
429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
430 return true;
e2c4ab3c
AA		 431}
432
3bfb0fc5 433/*
42acd021 434 * Signal state manager thread if session fore channel is drained
3bfb0fc5 435 */
42acd021 436static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 437{
a2118c33 438 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 439 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
440 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 441 return;
442 }
443
45d43c29 444 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 445 return;
446
42acd021
AA		 447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
448 complete(&ses->fc_slot_table.complete);
449}
450
451/*
452 * Signal state manager thread if session back channel is drained
453 */
454void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
455{
456 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 457 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 458 return;
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
460 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 461}
462
d185a334 463static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 464{
465 struct nfs4_slot_table *tbl;
466
d185a334 467 tbl = &res->sr_session->fc_slot_table;
dfb4f309 468 if (!res->sr_slot) {
13615871
AA		 469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
691daf3b 471 dprintk("%s: No slot\n", __func__);
35dc1d74 472 return;
13615871 473 }
ea028ac9 474
35dc1d74 475 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 476 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 477 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 478 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 479 res->sr_slot = NULL;
13615871
AA		 480}
481
14516c3a 482static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 483{
484 unsigned long timestamp;
14516c3a 485 struct nfs_client *clp;
b0df806c
AA		 486
487 /*
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
491 * operation.
492 */
493 if (res->sr_status == 1)
494 res->sr_status = NFS_OK;
495
468f8613
BS		 496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task))
b0df806c
AA		 498 goto out;
499
691daf3b 500 /* Check the SEQUENCE operation status */
14516c3a
TM		 501 switch (res->sr_status) {
502 case 0:
b0df806c 503 /* Update the slot's sequence and clientid lease timer */
dfb4f309 504 ++res->sr_slot->seq_nr;
b0df806c 505 timestamp = res->sr_renewal_time;
14516c3a 506 clp = res->sr_session->clp;
452e9352 507 do_renew_lease(clp, timestamp);
0629e370 508 /* Check sequence flags */
b4410c2f
TM		 509 if (res->sr_status_flags != 0)
510 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 511 break;
512 case -NFS4ERR_DELAY:
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 * of RFC5661.
516 */
12364a4f 517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 518 __func__,
519 res->sr_slot - res->sr_session->fc_slot_table.slots,
520 res->sr_slot->seq_nr);
14516c3a
TM		 521 goto out_retry;
522 default:
523 /* Just update the slot sequence no. */
dfb4f309 524 ++res->sr_slot->seq_nr;
b0df806c
AA		 525 }
526out:
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 529 nfs41_sequence_free_slot(res);
14516c3a
TM		 530 return 1;
531out_retry:
d05dd4e9 532 if (!rpc_restart_call(task))
14516c3a
TM		 533 goto out;
534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
535 return 0;
b0df806c
AA		 536}
537
14516c3a
TM		 538static int nfs4_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
df896455 540{
14516c3a
TM		 541 if (res->sr_session == NULL)
542 return 1;
543 return nfs41_sequence_done(task, res);
df896455
TM		 544}
545
510b8175
BH		 546/*
547 * nfs4_find_slot - efficiently look for a free slot
548 *
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
45d43c29 552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 553 *
554 * Note: must be called with under the slot_tbl_lock.
510b8175 555 */
45d43c29 556static u32
40ead580 557nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 558{
45d43c29
TM		 559 u32 slotid;
560 u32 ret_id = NFS4_NO_SLOT;
510b8175 561
45d43c29 562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 563 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
564 tbl->max_slots);
565 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
566 if (slotid >= tbl->max_slots)
567 goto out;
568 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 569 if (slotid > tbl->highest_used_slotid ||
570 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 571 tbl->highest_used_slotid = slotid;
572 ret_id = slotid;
573out:
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 576 return ret_id;
577}
578
9d12b216
TM		 579static void nfs41_init_sequence(struct nfs4_sequence_args *args,
580 struct nfs4_sequence_res *res, int cache_reply)
581{
582 args->sa_session = NULL;
583 args->sa_cache_this = 0;
584 if (cache_reply)
585 args->sa_cache_this = 1;
586 res->sr_session = NULL;
587 res->sr_slot = NULL;
588}
589
dc70d7b3 590int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 591 struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res,
ce5039c1
AA		 593 struct rpc_task *task)
594{
fbcd4abc
AA		 595 struct nfs4_slot *slot;
596 struct nfs4_slot_table *tbl;
45d43c29 597 u32 slotid;
fbcd4abc
AA		 598
599 dprintk("--> %s\n", __func__);
ce5039c1 600 /* slot already allocated? */
dfb4f309 601 if (res->sr_slot != NULL)
ce5039c1
AA		 602 return 0;
603
fbcd4abc
AA		 604 tbl = &session->fc_slot_table;
605
606 spin_lock(&tbl->slot_tbl_lock);
a2118c33 607 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 608 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 609 /* The state manager will wait until the slot table is empty */
05f0d236 610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 611 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 612 dprintk("%s session is draining\n", __func__);
05f0d236 613 return -EAGAIN;
b069d94a
AA		 614 }
615
689cf5c1
AB		 616 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
617 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
618 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
619 spin_unlock(&tbl->slot_tbl_lock);
620 dprintk("%s enforce FIFO order\n", __func__);
621 return -EAGAIN;
622 }
623
40ead580 624 slotid = nfs4_find_slot(tbl);
45d43c29 625 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 626 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
627 spin_unlock(&tbl->slot_tbl_lock);
628 dprintk("<-- %s: no free slots\n", __func__);
629 return -EAGAIN;
630 }
631 spin_unlock(&tbl->slot_tbl_lock);
632
689cf5c1 633 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 634 slot = tbl->slots + slotid;
99fe60d0 635 args->sa_session = session;
fbcd4abc 636 args->sa_slotid = slotid;
fbcd4abc
AA		 637
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
639
99fe60d0 640 res->sr_session = session;
dfb4f309 641 res->sr_slot = slot;
fbcd4abc 642 res->sr_renewal_time = jiffies;
2a6e26cd 643 res->sr_status_flags = 0;
fbcd4abc
AA		 644 /*
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
647 */
648 res->sr_status = 1;
ce5039c1
AA		 649 return 0;
650}
dc70d7b3 651EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 652
035168ab 653int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 654 struct nfs4_sequence_args *args,
655 struct nfs4_sequence_res *res,
ce5039c1
AA		 656 struct rpc_task *task)
657{
035168ab 658 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 659 int ret = 0;
660
9d12b216 661 if (session == NULL)
035168ab 662 goto out;
035168ab 663
12364a4f 664 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 665 __func__, session->clp, session, res->sr_slot ?
666 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 667
9d12b216 668 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 669out:
670 dprintk("<-- %s status=%d\n", __func__, ret);
671 return ret;
672}
673
674struct nfs41_call_sync_data {
035168ab 675 const struct nfs_server *seq_server;
ce5039c1
AA		 676 struct nfs4_sequence_args *seq_args;
677 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 678};
679
680static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
681{
682 struct nfs41_call_sync_data *data = calldata;
683
035168ab
TM		 684 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
685
686 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 687 data->seq_res, task))
ce5039c1
AA		 688 return;
689 rpc_call_start(task);
690}
691
b257957e
AB		 692static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
693{
694 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
695 nfs41_call_sync_prepare(task, calldata);
696}
697
69ab40c4
AA		 698static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
699{
700 struct nfs41_call_sync_data *data = calldata;
701
14516c3a 702 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 703}
704
17280175 705static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 706 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 707 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 708};
709
17280175 710static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 711 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
712 .rpc_call_done = nfs41_call_sync_done,
713};
714
7c513058
BS		 715static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
716 struct nfs_server *server,
ce5039c1
AA		 717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res,
b257957e 720 int privileged)
ce5039c1
AA		 721{
722 int ret;
723 struct rpc_task *task;
724 struct nfs41_call_sync_data data = {
035168ab 725 .seq_server = server,
ce5039c1
AA		 726 .seq_args = args,
727 .seq_res = res,
ce5039c1
AA		 728 };
729 struct rpc_task_setup task_setup = {
7c513058 730 .rpc_client = clnt,
ce5039c1
AA		 731 .rpc_message = msg,
732 .callback_ops = &nfs41_call_sync_ops,
733 .callback_data = &data
734 };
735
b257957e
AB		 736 if (privileged)
737 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 738 task = rpc_run_task(&task_setup);
739 if (IS_ERR(task))
740 ret = PTR_ERR(task);
741 else {
742 ret = task->tk_status;
743 rpc_put_task(task);
744 }
745 return ret;
746}
747
7c513058
BS		 748int _nfs4_call_sync_session(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
TM		 755 nfs41_init_sequence(args, res, cache_reply);
756 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 757}
758
df896455 759#else
9d12b216
TM		 760static inline
761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
14516c3a
TM		 766static int nfs4_sequence_done(struct rpc_task *task,
767 struct nfs4_sequence_res *res)
df896455 768{
14516c3a 769 return 1;
df896455 770}
cccef3b9
AA		 771#endif /* CONFIG_NFS_V4_1 */
772
7c513058
BS		 773int _nfs4_call_sync(struct rpc_clnt *clnt,
774 struct nfs_server *server,
cccef3b9
AA		 775 struct rpc_message *msg,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 int cache_reply)
779{
9d12b216 780 nfs41_init_sequence(args, res, cache_reply);
7c513058 781 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 782}
783
e73b83f2 784static inline
7c513058
BS		 785int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
e73b83f2
BS		 787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
790 int cache_reply)
791{
7c513058
BS		 792 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
793 args, res, cache_reply);
e73b83f2 794}
cccef3b9 795
38478b24 796static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 797{
38478b24 798 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 799
38478b24 800 spin_lock(&dir->i_lock);
359d7d1c 801 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 802 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 803 nfs_force_lookup_revalidate(dir);
a9a4a87a 804 dir->i_version = cinfo->after;
38478b24 805 spin_unlock(&dir->i_lock);
1da177e4
LT		 806}
807
e56e0b78 808struct nfs4_opendata {
c6d00e63 809 struct kref kref;
e56e0b78
TM		 810 struct nfs_openargs o_arg;
811 struct nfs_openres o_res;
cdd4e68b
TM		 812 struct nfs_open_confirmargs c_arg;
813 struct nfs_open_confirmres c_res;
6926afd1
TM		 814 struct nfs4_string owner_name;
815 struct nfs4_string group_name;
e56e0b78 816 struct nfs_fattr f_attr;
e56e0b78 817 struct dentry *dir;
82a2c1b7 818 struct dentry *dentry;
e56e0b78 819 struct nfs4_state_owner *owner;
aac00a8d 820 struct nfs4_state *state;
e56e0b78 821 struct iattr attrs;
26e976a8 822 unsigned long timestamp;
3e309914 823 unsigned int rpc_done : 1;
24ac23ab
TM		 824 int rpc_status;
825 int cancelled;
e56e0b78
TM		 826};
827
2ced46c2
TM		 828
829static void nfs4_init_opendata_res(struct nfs4_opendata *p)
830{
831 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 832 p->o_res.seqid = p->o_arg.seqid;
833 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 834 p->o_res.server = p->o_arg.server;
835 nfs_fattr_init(&p->f_attr);
6926afd1 836 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 837}
838
82a2c1b7 839static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 840 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 841 const struct iattr *attrs,
842 gfp_t gfp_mask)
e56e0b78 843{
82a2c1b7 844 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 845 struct inode *dir = parent->d_inode;
846 struct nfs_server *server = NFS_SERVER(dir);
847 struct nfs4_opendata *p;
848
8535b2be 849 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 850 if (p == NULL)
851 goto err;
8535b2be 852 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 853 if (p->o_arg.seqid == NULL)
854 goto err_free;
82a2c1b7
AV		 855 nfs_sb_active(dentry->d_sb);
856 p->dentry = dget(dentry);
e56e0b78
TM		 857 p->dir = parent;
858 p->owner = sp;
859 atomic_inc(&sp->so_count);
860 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 861 p->o_arg.open_flags = flags;
862 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 863 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 864 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
865 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 866 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 867 p->o_arg.server = server;
868 p->o_arg.bitmask = server->attr_bitmask;
1549210f 869 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 870 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 871 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 872 __be32 verf[2];
d77d76ff 873
e56e0b78
TM		 874 p->o_arg.u.attrs = &p->attrs;
875 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 876
877 verf[0] = jiffies;
878 verf[1] = current->pid;
879 memcpy(p->o_arg.u.verifier.data, verf,
880 sizeof(p->o_arg.u.verifier.data));
e56e0b78 881 }
cdd4e68b
TM		 882 p->c_arg.fh = &p->o_res.fh;
883 p->c_arg.stateid = &p->o_res.stateid;
884 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 885 nfs4_init_opendata_res(p);
c6d00e63 886 kref_init(&p->kref);
e56e0b78
TM		 887 return p;
888err_free:
889 kfree(p);
890err:
891 dput(parent);
892 return NULL;
893}
894
c6d00e63 895static void nfs4_opendata_free(struct kref *kref)
e56e0b78 896{
c6d00e63
TM		 897 struct nfs4_opendata *p = container_of(kref,
898 struct nfs4_opendata, kref);
82a2c1b7 899 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 900
901 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 902 if (p->state != NULL)
903 nfs4_put_open_state(p->state);
c6d00e63
TM		 904 nfs4_put_state_owner(p->owner);
905 dput(p->dir);
82a2c1b7
AV		 906 dput(p->dentry);
907 nfs_sb_deactive(sb);
6926afd1 908 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 909 kfree(p);
910}
911
912static void nfs4_opendata_put(struct nfs4_opendata *p)
913{
914 if (p != NULL)
915 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 916}
917
06f814a3
TM		 918static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
919{
06f814a3
TM		 920 int ret;
921
06f814a3 922 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 923 return ret;
924}
925
dc0b027d 926static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 927{
928 int ret = 0;
dc0b027d 929
536e43d1 930 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 931 goto out;
932 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 933 case FMODE_READ:
88069f77
TM		 934 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
935 && state->n_rdonly != 0;
6ee41268
TM		 936 break;
937 case FMODE_WRITE:
88069f77
TM		 938 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
939 && state->n_wronly != 0;
6ee41268
TM		 940 break;
941 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 942 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
943 && state->n_rdwr != 0;
6ee41268 944 }
dc0b027d 945out:
6ee41268
TM		 946 return ret;
947}
948
dc0b027d 949static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 950{
652f89f6
TM		 951 if (delegation == NULL)
952 return 0;
dc0b027d 953 if ((delegation->type & fmode) != fmode)
aac00a8d 954 return 0;
15c831bf 955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 956 return 0;
b7391f44 957 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 958 return 1;
959}
960
dc0b027d 961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 962{
dc0b027d 963 switch (fmode) {
e7616923
TM		 964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
dc0b027d 973 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 974}
975
dc0b027d 976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 981 switch (fmode) {
003707c7
TM		 982 case FMODE_READ:
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 break;
985 case FMODE_WRITE:
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
990 }
e7616923
TM		 991}
992
dc0b027d 993static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 994{
8bda4e4c 995 write_seqlock(&state->seqlock);
dc0b027d 996 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 997 write_sequnlock(&state->seqlock);
003707c7
TM		 998}
999
dc0b027d 1000static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1001{
8bda4e4c
TM		 1002 /*
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1005 */
1006 write_seqlock(&state->seqlock);
003707c7 1007 if (deleg_stateid != NULL) {
f597c537 1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1010 }
1011 if (open_stateid != NULL)
dc0b027d 1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
dc0b027d 1015 update_open_stateflags(state, fmode);
ec073428 1016 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1017}
1018
dc0b027d 1019static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1020{
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1023 int ret = 0;
1024
dc0b027d 1025 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1026
1027 rcu_read_lock();
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1030 goto no_delegation;
1031
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
dc0b027d 1034 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1035 goto no_delegation_unlock;
1036
1037 if (delegation == NULL)
1038 delegation = &deleg_cur->stateid;
f597c537 1039 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1040 goto no_delegation_unlock;
1041
b7391f44 1042 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1043 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1044 ret = 1;
1045no_delegation_unlock:
1046 spin_unlock(&deleg_cur->lock);
1047no_delegation:
1048 rcu_read_unlock();
1049
1050 if (!ret && open_stateid != NULL) {
dc0b027d 1051 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1052 ret = 1;
1053 }
1054
1055 return ret;
1056}
1057
1058
dc0b027d 1059static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1060{
1061 struct nfs_delegation *delegation;
1062
1063 rcu_read_lock();
1064 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1065 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1066 rcu_read_unlock();
1067 return;
1068 }
1069 rcu_read_unlock();
57ec14c5 1070 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1071}
1072
6ee41268 1073static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1074{
1075 struct nfs4_state *state = opendata->state;
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_delegation *delegation;
536e43d1 1078 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1079 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1080 nfs4_stateid stateid;
1081 int ret = -EAGAIN;
1082
aac00a8d 1083 for (;;) {
dc0b027d 1084 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1085 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1086 if (can_open_cached(state, fmode, open_mode)) {
1087 update_open_stateflags(state, fmode);
6ee41268 1088 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1089 goto out_return_state;
1090 }
1091 spin_unlock(&state->owner->so_lock);
1092 }
34310430
TM		 1093 rcu_read_lock();
1094 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1095 if (!can_open_delegated(delegation, fmode)) {
34310430 1096 rcu_read_unlock();
aac00a8d 1097 break;
34310430 1098 }
aac00a8d 1099 /* Save the delegation */
f597c537 1100 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1101 rcu_read_unlock();
af22f94a 1102 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1103 if (ret != 0)
1104 goto out;
1105 ret = -EAGAIN;
34310430
TM		 1106
1107 /* Try to update the stateid using the delegation */
dc0b027d 1108 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1109 goto out_return_state;
aac00a8d 1110 }
aac00a8d
TM		 1111out:
1112 return ERR_PTR(ret);
1113out_return_state:
1114 atomic_inc(&state->count);
1115 return state;
1116}
1117
24ac23ab
TM		 1118static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1119{
1120 struct inode *inode;
1121 struct nfs4_state *state = NULL;
003707c7 1122 struct nfs_delegation *delegation;
1b370bc2 1123 int ret;
24ac23ab 1124
aac00a8d 1125 if (!data->rpc_done) {
6ee41268 1126 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1127 goto out;
1128 }
1129
1b370bc2 1130 ret = -EAGAIN;
24ac23ab 1131 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1132 goto err;
24ac23ab 1133 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1134 ret = PTR_ERR(inode);
03f28e3a 1135 if (IS_ERR(inode))
1b370bc2
TM		 1136 goto err;
1137 ret = -ENOMEM;
24ac23ab
TM		 1138 state = nfs4_get_open_state(inode, data->owner);
1139 if (state == NULL)
1b370bc2 1140 goto err_put_inode;
549d6ed5 1141 if (data->o_res.delegation_type != 0) {
4e0038b6 1142 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1143 int delegation_flags = 0;
1144
003707c7
TM		 1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(inode)->delegation);
1147 if (delegation)
1148 delegation_flags = delegation->flags;
1149 rcu_read_unlock();
652f89f6
TM		 1150 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1154 clp->cl_hostname);
652f89f6 1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1156 nfs_inode_set_delegation(state->inode,
1157 data->owner->so_cred,
1158 &data->o_res);
1159 else
1160 nfs_inode_reclaim_delegation(state->inode,
1161 data->owner->so_cred,
1162 &data->o_res);
1163 }
34310430
TM		 1164
1165 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1166 data->o_arg.fmode);
24ac23ab 1167 iput(inode);
aac00a8d 1168out:
24ac23ab 1169 return state;
1b370bc2
TM		 1170err_put_inode:
1171 iput(inode);
1172err:
1173 return ERR_PTR(ret);
24ac23ab
TM		 1174}
1175
864472e9
TM		 1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
6f220ed5
TM		 1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
3d4ff43d 1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
dc0b027d 1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1206{
2ced46c2 1207 struct nfs4_state *newstate;
864472e9
TM		 1208 int ret;
1209
dc0b027d
TM		 1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
b257957e 1215 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1216 if (ret != 0)
1217 return ret;
2ced46c2 1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
643168c2 1221 nfs4_close_state(newstate, fmode);
2ced46c2 1222 *res = newstate;
864472e9
TM		 1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
864472e9 1228 struct nfs4_state *newstate;
864472e9
TM		 1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
2ced46c2 1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
b0ed9dbc 1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1237 if (ret != 0)
1238 return ret;
2ced46c2
TM		 1239 if (newstate != state)
1240 return -ESTALE;
864472e9
TM		 1241 }
1242 if (state->n_wronly != 0) {
b0ed9dbc 1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1245 if (ret != 0)
1246 return ret;
2ced46c2
TM		 1247 if (newstate != state)
1248 return -ESTALE;
864472e9
TM		 1249 }
1250 if (state->n_rdonly != 0) {
b0ed9dbc 1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1253 if (ret != 0)
1254 return ret;
2ced46c2
TM		 1255 if (newstate != state)
1256 return -ESTALE;
864472e9 1257 }
1ac7e2fd
TM		 1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1264 write_seqlock(&state->seqlock);
1ac7e2fd 1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1267 write_sequnlock(&state->seqlock);
1ac7e2fd 1268 }
864472e9
TM		 1269 return 0;
1270}
1271
1da177e4
LT		 1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1da177e4 1275 */
539cd03a 1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1277{
1ac7e2fd 1278 struct nfs_delegation *delegation;
864472e9 1279 struct nfs4_opendata *opendata;
dc0b027d 1280 fmode_t delegation_type = 0;
1da177e4
LT		 1281 int status;
1282
6f220ed5
TM		 1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
864472e9
TM		 1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1291 delegation_type = delegation->type;
1ac7e2fd 1292 rcu_read_unlock();
864472e9
TM		 1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
c6d00e63 1295 nfs4_opendata_put(opendata);
1da177e4
LT		 1296 return status;
1297}
1298
539cd03a 1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
539cd03a 1305 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1306 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1309 } while (exception.retry);
1310 return err;
1311}
1312
864472e9
TM		 1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
539cd03a 1321 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
13437e12 1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1327{
e56e0b78 1328 struct nfs4_opendata *opendata;
864472e9 1329 int ret;
1da177e4 1330
6f220ed5
TM		 1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
e56e0b78 1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1336 ret = nfs4_open_recover(opendata, state);
c6d00e63 1337 nfs4_opendata_put(opendata);
864472e9 1338 return ret;
1da177e4
LT		 1339}
1340
13437e12 1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1342{
1343 struct nfs4_exception exception = { };
539cd03a 1344 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1345 int err;
1346 do {
13437e12 1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1348 switch (err) {
1349 case 0:
965b5d67
TM		 1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
bcfa49f6
RL		 1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
9f594791 1358 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1359 goto out;
1da177e4
LT		 1360 case -NFS4ERR_STALE_CLIENTID:
1361 case -NFS4ERR_STALE_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 /* Don't recall a delegation if it was lost */
0400a6b0 1364 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1365 goto out;
1366 case -ERESTARTSYS:
1367 /*
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1370 */
a1d0b5ee 1371 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1372 case -NFS4ERR_ADMIN_REVOKED:
1373 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1374 nfs_inode_find_state_and_recover(state->inode,
1375 stateid);
0400a6b0 1376 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1377 case -EKEYEXPIRED:
1378 /*
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1382 * proceed.
1383 */
965b5d67
TM		 1384 case -ENOMEM:
1385 err = 0;
1386 goto out;
1da177e4
LT		 1387 }
1388 err = nfs4_handle_exception(server, err, &exception);
1389 } while (exception.retry);
965b5d67 1390out:
1da177e4
LT		 1391 return err;
1392}
1393
cdd4e68b
TM		 1394static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1395{
1396 struct nfs4_opendata *data = calldata;
1397
1398 data->rpc_status = task->tk_status;
26e976a8 1399 if (data->rpc_status == 0) {
f597c537 1400 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1401 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1402 renew_lease(data->o_res.server, data->timestamp);
3e309914 1403 data->rpc_done = 1;
26e976a8 1404 }
cdd4e68b
TM		 1405}
1406
1407static void nfs4_open_confirm_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
3e309914 1416 if (!data->rpc_done)
cdd4e68b 1417 goto out_free;
cdd4e68b 1418 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1419 if (!IS_ERR(state))
643168c2 1420 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1421out_free:
c6d00e63 1422 nfs4_opendata_put(data);
cdd4e68b
TM		 1423}
1424
1425static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1426 .rpc_call_done = nfs4_open_confirm_done,
1427 .rpc_release = nfs4_open_confirm_release,
1428};
1429
1430/*
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1432 */
1433static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1434{
1435 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1436 struct rpc_task *task;
5138fde0
TM		 1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1439 .rpc_argp = &data->c_arg,
1440 .rpc_resp = &data->c_res,
1441 .rpc_cred = data->owner->so_cred,
1442 };
c970aa85
TM		 1443 struct rpc_task_setup task_setup_data = {
1444 .rpc_client = server->client,
5138fde0 1445 .rpc_message = &msg,
c970aa85
TM		 1446 .callback_ops = &nfs4_open_confirm_ops,
1447 .callback_data = data,
101070ca 1448 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1449 .flags = RPC_TASK_ASYNC,
1450 };
1da177e4
LT		 1451 int status;
1452
c6d00e63 1453 kref_get(&data->kref);
3e309914
TM		 1454 data->rpc_done = 0;
1455 data->rpc_status = 0;
5138fde0 1456 data->timestamp = jiffies;
c970aa85 1457 task = rpc_run_task(&task_setup_data);
7a1218a2 1458 if (IS_ERR(task))
cdd4e68b 1459 return PTR_ERR(task);
cdd4e68b
TM		 1460 status = nfs4_wait_for_completion_rpc_task(task);
1461 if (status != 0) {
1462 data->cancelled = 1;
1463 smp_wmb();
1464 } else
1465 status = data->rpc_status;
e6b3c4db 1466 rpc_put_task(task);
1da177e4
LT		 1467 return status;
1468}
1469
24ac23ab 1470static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1471{
24ac23ab
TM		 1472 struct nfs4_opendata *data = calldata;
1473 struct nfs4_state_owner *sp = data->owner;
5138fde0 1474
24ac23ab
TM		 1475 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1476 return;
aac00a8d
TM		 1477 /*
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1480 */
1481 if (data->state != NULL) {
1482 struct nfs_delegation *delegation;
1483
dc0b027d 1484 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1485 goto out_no_action;
aac00a8d
TM		 1486 rcu_read_lock();
1487 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1488 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1489 can_open_delegated(delegation, data->o_arg.fmode))
1490 goto unlock_no_action;
aac00a8d
TM		 1491 rcu_read_unlock();
1492 }
95b72eb0 1493 /* Update client id. */
1f0e890d 1494 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1495 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1496 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1497 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1498 }
26e976a8 1499 data->timestamp = jiffies;
035168ab 1500 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1501 &data->o_arg.seq_args,
9d12b216 1502 &data->o_res.seq_res, task))
d898528c 1503 return;
5138fde0 1504 rpc_call_start(task);
6ee41268 1505 return;
652f89f6
TM		 1506unlock_no_action:
1507 rcu_read_unlock();
6ee41268
TM		 1508out_no_action:
1509 task->tk_action = NULL;
1510
24ac23ab 1511}
1da177e4 1512
b257957e
AB		 1513static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1514{
1515 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1516 nfs4_open_prepare(task, calldata);
1517}
1518
24ac23ab
TM		 1519static void nfs4_open_done(struct rpc_task *task, void *calldata)
1520{
1521 struct nfs4_opendata *data = calldata;
1da177e4 1522
24ac23ab 1523 data->rpc_status = task->tk_status;
d898528c 1524
14516c3a
TM		 1525 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1526 return;
d898528c 1527
24ac23ab
TM		 1528 if (task->tk_status == 0) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1530 case S_IFREG:
1531 break;
1532 case S_IFLNK:
24ac23ab 1533 data->rpc_status = -ELOOP;
6f926b5b
TM		 1534 break;
1535 case S_IFDIR:
24ac23ab 1536 data->rpc_status = -EISDIR;
6f926b5b
TM		 1537 break;
1538 default:
24ac23ab 1539 data->rpc_status = -ENOTDIR;
6f926b5b 1540 }
26e976a8 1541 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1542 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1543 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1544 }
3e309914 1545 data->rpc_done = 1;
24ac23ab 1546}
6f926b5b 1547
24ac23ab
TM		 1548static void nfs4_open_release(void *calldata)
1549{
1550 struct nfs4_opendata *data = calldata;
1551 struct nfs4_state *state = NULL;
1552
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data->cancelled == 0)
1555 goto out_free;
1556 /* In case of error, no cleanup! */
3e309914 1557 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1558 goto out_free;
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1561 goto out_free;
24ac23ab 1562 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1563 if (!IS_ERR(state))
643168c2 1564 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1565out_free:
c6d00e63 1566 nfs4_opendata_put(data);
24ac23ab
TM		 1567}
1568
1569static const struct rpc_call_ops nfs4_open_ops = {
1570 .rpc_call_prepare = nfs4_open_prepare,
1571 .rpc_call_done = nfs4_open_done,
1572 .rpc_release = nfs4_open_release,
1573};
1574
b257957e
AB		 1575static const struct rpc_call_ops nfs4_recover_open_ops = {
1576 .rpc_call_prepare = nfs4_recover_open_prepare,
1577 .rpc_call_done = nfs4_open_done,
1578 .rpc_release = nfs4_open_release,
1579};
1580
1581static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1582{
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 struct rpc_task *task;
5138fde0
TM		 1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1590 .rpc_argp = o_arg,
1591 .rpc_resp = o_res,
1592 .rpc_cred = data->owner->so_cred,
1593 };
c970aa85
TM		 1594 struct rpc_task_setup task_setup_data = {
1595 .rpc_client = server->client,
5138fde0 1596 .rpc_message = &msg,
c970aa85
TM		 1597 .callback_ops = &nfs4_open_ops,
1598 .callback_data = data,
101070ca 1599 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1600 .flags = RPC_TASK_ASYNC,
1601 };
24ac23ab
TM		 1602 int status;
1603
9d12b216 1604 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1605 kref_get(&data->kref);
3e309914
TM		 1606 data->rpc_done = 0;
1607 data->rpc_status = 0;
2ced46c2 1608 data->cancelled = 0;
b257957e
AB		 1609 if (isrecover)
1610 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1611 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1612 if (IS_ERR(task))
1613 return PTR_ERR(task);
1614 status = nfs4_wait_for_completion_rpc_task(task);
1615 if (status != 0) {
1616 data->cancelled = 1;
1617 smp_wmb();
1618 } else
1619 status = data->rpc_status;
1620 rpc_put_task(task);
1621
1622 return status;
1623}
1624
1625static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1626{
1627 struct inode *dir = data->dir->d_inode;
1628 struct nfs_openres *o_res = &data->o_res;
1629 int status;
1630
1631 status = nfs4_run_open_task(data, 1);
1632 if (status != 0 || !data->rpc_done)
1633 return status;
1634
6926afd1
TM		 1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1636
b257957e
AB		 1637 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1639 if (status != 0)
1640 return status;
1641 }
1642
1643 return status;
1644}
1645
1646/*
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1648 */
1649static int _nfs4_proc_open(struct nfs4_opendata *data)
1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 int status;
1656
1657 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1658 if (!data->rpc_done)
1659 return status;
1660 if (status != 0) {
1661 if (status == -NFS4ERR_BADNAME &&
1662 !(o_arg->open_flags & O_CREAT))
1663 return -ENOENT;
24ac23ab 1664 return status;
08ef7bd3 1665 }
24ac23ab 1666
6926afd1
TM		 1667 nfs_fattr_map_and_free_names(server, &data->f_attr);
1668
90ff0c54 1669 if (o_arg->open_flags & O_CREAT)
56ae19f3 1670 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1671 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1672 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1673 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1674 status = _nfs4_proc_open_confirm(data);
1da177e4 1675 if (status != 0)
24ac23ab 1676 return status;
1da177e4
LT		 1677 }
1678 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1679 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1680 return 0;
1da177e4
LT		 1681}
1682
d83217c1 1683static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1684{
a78cb57a 1685 unsigned int loop;
6b30954e 1686 int ret;
58d9714a 1687
a78cb57a 1688 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1689 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1690 if (ret != 0)
a78cb57a 1691 break;
e598d843
TM		 1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1694 break;
0400a6b0 1695 nfs4_schedule_state_manager(clp);
a78cb57a 1696 ret = -EIO;
6b30954e 1697 }
a78cb57a 1698 return ret;
58d9714a
TM		 1699}
1700
d83217c1
AA		 1701static int nfs4_recover_expired_lease(struct nfs_server *server)
1702{
1703 return nfs4_client_recover_expired_lease(server->nfs_client);
1704}
1705
1da177e4
LT		 1706/*
1707 * OPEN_EXPIRED:
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1710 */
539cd03a 1711static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1712{
e56e0b78 1713 struct nfs4_opendata *opendata;
864472e9 1714 int ret;
1da177e4 1715
6f220ed5
TM		 1716 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1717 if (IS_ERR(opendata))
1718 return PTR_ERR(opendata);
864472e9 1719 ret = nfs4_open_recover(opendata, state);
35d05778 1720 if (ret == -ESTALE)
3d4ff43d 1721 d_drop(ctx->dentry);
c6d00e63 1722 nfs4_opendata_put(opendata);
864472e9 1723 return ret;
1da177e4
LT		 1724}
1725
a9ed2e25 1726static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1727{
539cd03a 1728 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1729 struct nfs4_exception exception = { };
1730 int err;
1731
1732 do {
539cd03a 1733 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1734 switch (err) {
1735 default:
1736 goto out;
1737 case -NFS4ERR_GRACE:
1738 case -NFS4ERR_DELAY:
1739 nfs4_handle_exception(server, err, &exception);
1740 err = 0;
1741 }
202b50dc 1742 } while (exception.retry);
a9ed2e25 1743out:
202b50dc
TM		 1744 return err;
1745}
1746
1da177e4
LT		 1747static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1748{
1da177e4 1749 struct nfs_open_context *ctx;
864472e9 1750 int ret;
1da177e4 1751
864472e9
TM		 1752 ctx = nfs4_state_find_open_context(state);
1753 if (IS_ERR(ctx))
1754 return PTR_ERR(ctx);
539cd03a 1755 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1756 put_nfs_open_context(ctx);
1757 return ret;
1da177e4
LT		 1758}
1759
f062eb6c 1760#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1761static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1762{
f062eb6c 1763 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1764 nfs4_stateid *stateid = &state->stateid;
1765 int status;
1766
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1769 return;
1770
1771 status = nfs41_test_stateid(server, stateid);
1772 if (status != NFS_OK) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status != -NFS4ERR_BAD_STATEID)
1776 nfs41_free_stateid(server, stateid);
1777
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1779 }
1780}
1781
1782/**
1783 * nfs41_check_open_stateid - possibly free an open stateid
1784 *
1785 * @state: NFSv4 state for an inode
1786 *
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1789 */
1790static int nfs41_check_open_stateid(struct nfs4_state *state)
1791{
1792 struct nfs_server *server = NFS_SERVER(state->inode);
1793 nfs4_stateid *stateid = &state->stateid;
1794 int status;
1795
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1801
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1808
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1812 }
1813 return status;
1814}
1815
1816static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1817{
eb64cf96 1818 int status;
b01dd1d8 1819
3e60ffdd
CL		 1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1824 return status;
f062eb6c
BS		 1825}
1826#endif
1827
aa53ed54
JL		 1828/*
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1832 */
1833static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1834{
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1838
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1842}
1843
1da177e4 1844/*
24ac23ab 1845 * Returns a referenced nfs4_state
1da177e4 1846 */
82be417a
AA		 1847static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1849 fmode_t fmode,
1850 int flags,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1855{
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1859 struct nfs4_opendata *opendata;
aac00a8d 1860 int status;
1da177e4
LT		 1861
1862 /* Protect against reboot recovery conflicts */
1da177e4 1863 status = -ENOMEM;
d1e284d5
TM		 1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1865 if (sp == NULL) {
1da177e4
LT		 1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1867 goto out_err;
1868 }
58d9714a
TM		 1869 status = nfs4_recover_expired_lease(server);
1870 if (status != 0)
b4454fe1 1871 goto err_put_state_owner;
82a2c1b7
AV		 1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1874 status = -ENOMEM;
82a2c1b7 1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1876 if (opendata == NULL)
95d35cb4 1877 goto err_put_state_owner;
1da177e4 1878
82be417a
AA		 1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1549210f 1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1884 }
82a2c1b7
AV		 1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1887
24ac23ab 1888 status = _nfs4_proc_open(opendata);
1da177e4 1889 if (status != 0)
c6d00e63 1890 goto err_opendata_put;
1da177e4 1891
24ac23ab 1892 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1893 status = PTR_ERR(state);
1894 if (IS_ERR(state))
c6d00e63 1895 goto err_opendata_put;
0df5dd4a 1896 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1898
1899 if (opendata->o_arg.open_flags & O_EXCL) {
1900 nfs4_exclusive_attrset(opendata, sattr);
1901
1902 nfs_fattr_init(opendata->o_res.f_attr);
1903 status = nfs4_do_setattr(state->inode, cred,
1904 opendata->o_res.f_attr, sattr,
1905 state);
1906 if (status == 0)
1907 nfs_setattr_update_inode(state->inode, sattr);
1908 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1909 }
82be417a
AA		 1910
1911 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1912 *ctx_th = opendata->f_attr.mdsthreshold;
1913 else
1914 kfree(opendata->f_attr.mdsthreshold);
1915 opendata->f_attr.mdsthreshold = NULL;
1916
c6d00e63 1917 nfs4_opendata_put(opendata);
1da177e4 1918 nfs4_put_state_owner(sp);
1da177e4
LT		 1919 *res = state;
1920 return 0;
c6d00e63 1921err_opendata_put:
82be417a 1922 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1923 nfs4_opendata_put(opendata);
e56e0b78
TM		 1924err_put_state_owner:
1925 nfs4_put_state_owner(sp);
1da177e4 1926out_err:
1da177e4
LT		 1927 *res = NULL;
1928 return status;
1929}
1930
1931
82be417a
AA		 1932static struct nfs4_state *nfs4_do_open(struct inode *dir,
1933 struct dentry *dentry,
1934 fmode_t fmode,
1935 int flags,
1936 struct iattr *sattr,
1937 struct rpc_cred *cred,
1938 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1939{
1940 struct nfs4_exception exception = { };
1941 struct nfs4_state *res;
1942 int status;
1943
2d0dbc6a 1944 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1945 do {
82be417a
AA		 1946 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1947 &res, ctx_th);
1da177e4
LT		 1948 if (status == 0)
1949 break;
1950 /* NOTE: BAD_SEQID means the server and client disagree about the
1951 * book-keeping w.r.t. state-changing operations
1952 * (OPEN/CLOSE/LOCK/LOCKU...)
1953 * It is actually a sign of a bug on the client or on the server.
1954 *
1955 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1956 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1957 * have unhashed the old state_owner for us, and that we can
1958 * therefore safely retry using a new one. We should still warn
1959 * the user though...
1960 */
1961 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1962 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1963 " returned a bad sequence-id error!\n",
1964 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1965 exception.retry = 1;
1966 continue;
1967 }
550f5747
TM		 1968 /*
1969 * BAD_STATEID on OPEN means that the server cancelled our
1970 * state before it received the OPEN_CONFIRM.
1971 * Recover by retrying the request as per the discussion
1972 * on Page 181 of RFC3530.
1973 */
1974 if (status == -NFS4ERR_BAD_STATEID) {
1975 exception.retry = 1;
1976 continue;
1977 }
aac00a8d
TM		 1978 if (status == -EAGAIN) {
1979 /* We must have found a delegation */
1980 exception.retry = 1;
1981 continue;
1982 }
1da177e4
LT		 1983 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1984 status, &exception));
1985 } while (exception.retry);
1986 return res;
1987}
1988
659bfcd6
TM		 1989static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1990 struct nfs_fattr *fattr, struct iattr *sattr,
1991 struct nfs4_state *state)
1da177e4 1992{
3e4f6290 1993 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1994 struct nfs_setattrargs arg = {
3e4f6290 1995 .fh = NFS_FH(inode),
1da177e4
LT		 1996 .iap = sattr,
1997 .server = server,
1998 .bitmask = server->attr_bitmask,
1999 };
2000 struct nfs_setattrres res = {
2001 .fattr = fattr,
2002 .server = server,
2003 };
2004 struct rpc_message msg = {
659bfcd6
TM		 2005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2006 .rpc_argp = &arg,
2007 .rpc_resp = &res,
2008 .rpc_cred = cred,
1da177e4 2009 };
26e976a8 2010 unsigned long timestamp = jiffies;
65e4308d 2011 int status;
1da177e4 2012
0e574af1 2013 nfs_fattr_init(fattr);
1da177e4 2014
4fc8796d 2015 if (state != NULL) {
2a369153
TM		 2016 struct nfs_lockowner lockowner = {
2017 .l_owner = current->files,
2018 .l_pid = current->tgid,
2019 };
4fc8796d 2020 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2021 &lockowner);
4fc8796d
TM		 2022 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2023 FMODE_WRITE)) {
3e4f6290 2024 /* Use that stateid */
08e9eac4 2025 } else
f597c537 2026 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2027
7c513058 2028 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2029 if (status == 0 && state != NULL)
2030 renew_lease(server, timestamp);
65e4308d 2031 return status;
1da177e4
LT		 2032}
2033
659bfcd6
TM		 2034static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2035 struct nfs_fattr *fattr, struct iattr *sattr,
2036 struct nfs4_state *state)
1da177e4 2037{
3e4f6290 2038 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2039 struct nfs4_exception exception = {
2040 .state = state,
3114ea7a 2041 .inode = inode,
a1d0b5ee 2042 };
1da177e4
LT		 2043 int err;
2044 do {
451146be
TM		 2045 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2046 switch (err) {
2047 case -NFS4ERR_OPENMODE:
2048 if (state && !(state->state & FMODE_WRITE)) {
2049 err = -EBADF;
2050 if (sattr->ia_valid & ATTR_OPEN)
2051 err = -EACCES;
2052 goto out;
2053 }
2054 }
2055 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2056 } while (exception.retry);
451146be 2057out:
1da177e4
LT		 2058 return err;
2059}
2060
2061struct nfs4_closedata {
2062 struct inode *inode;
2063 struct nfs4_state *state;
2064 struct nfs_closeargs arg;
2065 struct nfs_closeres res;
516a6af6 2066 struct nfs_fattr fattr;
26e976a8 2067 unsigned long timestamp;
f7e8917a
FI		 2068 bool roc;
2069 u32 roc_barrier;
1da177e4
LT		 2070};
2071
963d8fe5 2072static void nfs4_free_closedata(void *data)
9512135d 2073{
963d8fe5
TM		 2074 struct nfs4_closedata *calldata = data;
2075 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2076 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2077
f7e8917a
FI		 2078 if (calldata->roc)
2079 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2080 nfs4_put_open_state(calldata->state);
2081 nfs_free_seqid(calldata->arg.seqid);
9512135d 2082 nfs4_put_state_owner(sp);
643168c2 2083 nfs_sb_deactive(sb);
9512135d
TM		 2084 kfree(calldata);
2085}
2086
88069f77
TM		 2087static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2088 fmode_t fmode)
2089{
2090 spin_lock(&state->owner->so_lock);
2091 if (!(fmode & FMODE_READ))
2092 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2093 if (!(fmode & FMODE_WRITE))
2094 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2095 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2096 spin_unlock(&state->owner->so_lock);
2097}
2098
963d8fe5 2099static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2100{
963d8fe5 2101 struct nfs4_closedata *calldata = data;
1da177e4 2102 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2103 struct nfs_server *server = NFS_SERVER(calldata->inode);
2104
a3ca5651 2105 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2106 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2107 return;
1da177e4
LT		 2108 /* hmm. we are done with the inode, and in the process of freeing
2109 * the state_owner. we keep this around to process errors
2110 */
1da177e4
LT		 2111 switch (task->tk_status) {
2112 case 0:
f7e8917a
FI		 2113 if (calldata->roc)
2114 pnfs_roc_set_barrier(state->inode,
2115 calldata->roc_barrier);
45328c35 2116 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2117 renew_lease(server, calldata->timestamp);
88069f77
TM		 2118 nfs4_close_clear_stateid_flags(state,
2119 calldata->arg.fmode);
1da177e4
LT		 2120 break;
2121 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2122 case -NFS4ERR_OLD_STATEID:
2123 case -NFS4ERR_BAD_STATEID:
1da177e4 2124 case -NFS4ERR_EXPIRED:
dc0b027d 2125 if (calldata->arg.fmode == 0)
9e33bed5 2126 break;
1da177e4 2127 default:
72211dbe
TM		 2128 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2129 rpc_restart_call_prepare(task);
1da177e4 2130 }
72211dbe 2131 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2132 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2133 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2134}
2135
4ce70ada 2136static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2137{
4ce70ada 2138 struct nfs4_closedata *calldata = data;
9512135d 2139 struct nfs4_state *state = calldata->state;
7fdab069 2140 struct inode *inode = calldata->inode;
88069f77 2141 int call_close = 0;
9512135d 2142
a3ca5651 2143 dprintk("%s: begin!\n", __func__);
963d8fe5 2144 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2145 return;
003707c7 2146
88069f77
TM		 2147 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2148 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2149 spin_lock(&state->owner->so_lock);
003707c7 2150 /* Calculate the change in open mode */
e7616923 2151 if (state->n_rdwr == 0) {
003707c7 2152 if (state->n_rdonly == 0) {
88069f77
TM		 2153 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2154 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2155 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2156 }
2157 if (state->n_wronly == 0) {
88069f77
TM		 2158 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2159 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2160 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2161 }
e7616923 2162 }
4cecb76f 2163 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2164
2165 if (!call_close) {
963d8fe5
TM		 2166 /* Note: exit _without_ calling nfs4_close_done */
2167 task->tk_action = NULL;
a3ca5651 2168 goto out;
9512135d 2169 }
88069f77 2170
f7e8917a 2171 if (calldata->arg.fmode == 0) {
88069f77 2172 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2173 if (calldata->roc &&
7fdab069 2174 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2175 goto out;
f7e8917a 2176 }
88069f77 2177
516a6af6 2178 nfs_fattr_init(calldata->res.fattr);
26e976a8 2179 calldata->timestamp = jiffies;
7fdab069 2180 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2181 &calldata->arg.seq_args,
2182 &calldata->res.seq_res,
2183 task))
a3ca5651 2184 goto out;
5138fde0 2185 rpc_call_start(task);
a3ca5651
CL		 2186out:
2187 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2188}
2189
963d8fe5 2190static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2191 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2192 .rpc_call_done = nfs4_close_done,
2193 .rpc_release = nfs4_free_closedata,
2194};
2195
1da177e4
LT		 2196/*
2197 * It is possible for data to be read/written from a mem-mapped file
2198 * after the sys_close call (which hits the vfs layer as a flush).
2199 * This means that we can't safely call nfsv4 close on a file until
2200 * the inode is cleared. This in turn means that we are not good
2201 * NFSv4 citizens - we do not indicate to the server to update the file's
2202 * share state even when we are done with one of the three share
2203 * stateid's in the inode.
2204 *
2205 * NOTE: Caller must be holding the sp->so_owner semaphore!
2206 */
643168c2 2207int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2208{
4a35bd41 2209 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2210 struct nfs4_closedata *calldata;
b39e625b
TM		 2211 struct nfs4_state_owner *sp = state->owner;
2212 struct rpc_task *task;
5138fde0
TM		 2213 struct rpc_message msg = {
2214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2215 .rpc_cred = state->owner->so_cred,
2216 };
c970aa85
TM		 2217 struct rpc_task_setup task_setup_data = {
2218 .rpc_client = server->client,
5138fde0 2219 .rpc_message = &msg,
c970aa85 2220 .callback_ops = &nfs4_close_ops,
101070ca 2221 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2222 .flags = RPC_TASK_ASYNC,
2223 };
9512135d 2224 int status = -ENOMEM;
1da177e4 2225
8535b2be 2226 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2227 if (calldata == NULL)
9512135d 2228 goto out;
9d12b216 2229 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2230 calldata->inode = state->inode;
1da177e4 2231 calldata->state = state;
4a35bd41 2232 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2233 calldata->arg.stateid = &state->open_stateid;
1da177e4 2234 /* Serialization for the sequence id */
8535b2be 2235 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2236 if (calldata->arg.seqid == NULL)
2237 goto out_free_calldata;
dc0b027d 2238 calldata->arg.fmode = 0;
a65318bf 2239 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2240 calldata->res.fattr = &calldata->fattr;
c1d51931 2241 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2242 calldata->res.server = server;
f7e8917a 2243 calldata->roc = roc;
643168c2 2244 nfs_sb_active(calldata->inode->i_sb);
9512135d 2245
1174dd1f
TM		 2246 msg.rpc_argp = &calldata->arg;
2247 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2248 task_setup_data.callback_data = calldata;
2249 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2250 if (IS_ERR(task))
2251 return PTR_ERR(task);
a49c3c77
TM		 2252 status = 0;
2253 if (wait)
2254 status = rpc_wait_for_completion_task(task);
b39e625b 2255 rpc_put_task(task);
a49c3c77 2256 return status;
9512135d
TM		 2257out_free_calldata:
2258 kfree(calldata);
2259out:
f7e8917a
FI		 2260 if (roc)
2261 pnfs_roc_release(state->inode);
b39e625b
TM		 2262 nfs4_put_open_state(state);
2263 nfs4_put_state_owner(sp);
9512135d 2264 return status;
1da177e4
LT		 2265}
2266
2b484297 2267static struct inode *
cd9a1c0e 2268nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2269{
1da177e4 2270 struct nfs4_state *state;
1da177e4 2271
565277f6 2272 /* Protect against concurrent sillydeletes */
82be417a
AA		 2273 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2274 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2275 if (IS_ERR(state))
2276 return ERR_CAST(state);
cd9a1c0e 2277 ctx->state = state;
f46e0bd3 2278 return igrab(state->inode);
1da177e4
LT		 2279}
2280
1185a552 2281static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2282{
2283 if (ctx->state == NULL)
2284 return;
2285 if (is_sync)
643168c2 2286 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2287 else
643168c2 2288 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2289}
1da177e4
LT		 2290
2291static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2292{
43652ad5
BH		 2293 struct nfs4_server_caps_arg args = {
2294 .fhandle = fhandle,
2295 };
1da177e4
LT		 2296 struct nfs4_server_caps_res res = {};
2297 struct rpc_message msg = {
2298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2299 .rpc_argp = &args,
1da177e4
LT		 2300 .rpc_resp = &res,
2301 };
2302 int status;
2303
7c513058 2304 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2305 if (status == 0) {
2306 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2307 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2308 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2309 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2310 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2311 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2312 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2313 server->caps |= NFS_CAP_ACLS;
2314 if (res.has_links != 0)
2315 server->caps |= NFS_CAP_HARDLINKS;
2316 if (res.has_symlinks != 0)
2317 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2318 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2319 server->caps |= NFS_CAP_FILEID;
2320 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2321 server->caps |= NFS_CAP_MODE;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2323 server->caps |= NFS_CAP_NLINK;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2325 server->caps |= NFS_CAP_OWNER;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2327 server->caps |= NFS_CAP_OWNER_GROUP;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2329 server->caps |= NFS_CAP_ATIME;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2331 server->caps |= NFS_CAP_CTIME;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2333 server->caps |= NFS_CAP_MTIME;
2334
a65318bf
TM		 2335 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2336 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2337 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2338 server->acl_bitmask = res.acl_bitmask;
264e6351 2339 server->fh_expire_type = res.fh_expire_type;
1da177e4 2340 }
cccef3b9 2341
1da177e4
LT		 2342 return status;
2343}
2344
55a97593 2345int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2346{
2347 struct nfs4_exception exception = { };
2348 int err;
2349 do {
2350 err = nfs4_handle_exception(server,
2351 _nfs4_server_capabilities(server, fhandle),
2352 &exception);
2353 } while (exception.retry);
2354 return err;
2355}
2356
2357static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2358 struct nfs_fsinfo *info)
2359{
1da177e4
LT		 2360 struct nfs4_lookup_root_arg args = {
2361 .bitmask = nfs4_fattr_bitmap,
2362 };
2363 struct nfs4_lookup_res res = {
2364 .server = server,
0e574af1 2365 .fattr = info->fattr,
1da177e4
LT		 2366 .fh = fhandle,
2367 };
2368 struct rpc_message msg = {
2369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2370 .rpc_argp = &args,
2371 .rpc_resp = &res,
2372 };
008f55d0 2373
0e574af1 2374 nfs_fattr_init(info->fattr);
7c513058 2375 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2376}
2377
2378static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2379 struct nfs_fsinfo *info)
2380{
2381 struct nfs4_exception exception = { };
2382 int err;
2383 do {
fb8a5ba8
BS		 2384 err = _nfs4_lookup_root(server, fhandle, info);
2385 switch (err) {
2386 case 0:
2387 case -NFS4ERR_WRONGSEC:
05e9cfb4 2388 goto out;
fb8a5ba8
BS		 2389 default:
2390 err = nfs4_handle_exception(server, err, &exception);
2391 }
1da177e4 2392 } while (exception.retry);
05e9cfb4 2393out:
1da177e4
LT		 2394 return err;
2395}
2396
8f70e95f
BS		 2397static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2398 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2399{
2400 struct rpc_auth *auth;
2401 int ret;
2402
2403 auth = rpcauth_create(flavor, server->client);
e8d920c5 2404 if (IS_ERR(auth)) {
8f70e95f
BS		 2405 ret = -EIO;
2406 goto out;
2407 }
2408 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2409out:
2410 return ret;
2411}
2412
801a16dc 2413static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2414 struct nfs_fsinfo *info)
1da177e4 2415{
8f70e95f 2416 int i, len, status = 0;
0fabee24 2417 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2418
6a1a1e34
CL		 2419 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2420 BUG_ON(len < 0);
8f70e95f
BS		 2421
2422 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2423 /* AUTH_UNIX is the default flavor if none was specified,
2424 * thus has already been tried. */
2425 if (flav_array[i] == RPC_AUTH_UNIX)
2426 continue;
2427
8f70e95f 2428 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2429 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2430 continue;
2431 break;
8f70e95f 2432 }
fb8a5ba8
BS		 2433 /*
2434 * -EACCESS could mean that the user doesn't have correct permissions
2435 * to access the mount. It could also mean that we tried to mount
2436 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2437 * existing mount programs don't handle -EACCES very well so it should
2438 * be mapped to -EPERM instead.
2439 */
2440 if (status == -EACCES)
2441 status = -EPERM;
801a16dc
BS		 2442 return status;
2443}
2444
2445/*
2446 * get the file handle for the "/" directory on the server
2447 */
3028eb2b
BS		 2448int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2449 struct nfs_fsinfo *info)
801a16dc 2450{
fca78d6d 2451 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2452 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2453 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2454 /*
2455 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2456 * by nfs4_map_errors() as this function exits.
2457 */
fca78d6d 2458 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2459 if (status == 0)
2460 status = nfs4_server_capabilities(server, fhandle);
2461 if (status == 0)
2462 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2463 return nfs4_map_errors(status);
1da177e4
LT		 2464}
2465
bae36241
BS		 2466static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2467 struct nfs_fsinfo *info)
2468{
2469 int error;
2470 struct nfs_fattr *fattr = info->fattr;
2471
2472 error = nfs4_server_capabilities(server, mntfh);
2473 if (error < 0) {
2474 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2475 return error;
2476 }
2477
2478 error = nfs4_proc_getattr(server, mntfh, fattr);
2479 if (error < 0) {
2480 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2481 return error;
2482 }
2483
2484 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2485 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2486 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2487
2488 return error;
2489}
2490
6b97fd3d
MN		 2491/*
2492 * Get locations and (maybe) other attributes of a referral.
2493 * Note that we'll actually follow the referral later when
2494 * we detect fsid mismatch in inode revalidation
2495 */
f05d147f
BS		 2496static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2497 const struct qstr *name, struct nfs_fattr *fattr,
2498 struct nfs_fh *fhandle)
6b97fd3d
MN		 2499{
2500 int status = -ENOMEM;
2501 struct page *page = NULL;
2502 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2503
2504 page = alloc_page(GFP_KERNEL);
2505 if (page == NULL)
2506 goto out;
2507 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2508 if (locations == NULL)
2509 goto out;
2510
f05d147f 2511 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2512 if (status != 0)
2513 goto out;
2514 /* Make sure server returned a different fsid for the referral */
2515 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2516 dprintk("%s: server did not return a different fsid for"
2517 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2518 status = -EIO;
2519 goto out;
2520 }
533eb461
AA		 2521 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2522 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2523
533eb461 2524 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2525 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2526 memset(fhandle, 0, sizeof(struct nfs_fh));
2527out:
2528 if (page)
2529 __free_page(page);
5d7ca35a 2530 kfree(locations);
6b97fd3d
MN		 2531 return status;
2532}
2533
1da177e4
LT		 2534static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2535{
2536 struct nfs4_getattr_arg args = {
2537 .fh = fhandle,
2538 .bitmask = server->attr_bitmask,
2539 };
2540 struct nfs4_getattr_res res = {
2541 .fattr = fattr,
2542 .server = server,
2543 };
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2546 .rpc_argp = &args,
2547 .rpc_resp = &res,
2548 };
2549
0e574af1 2550 nfs_fattr_init(fattr);
7c513058 2551 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2552}
2553
2554static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2555{
2556 struct nfs4_exception exception = { };
2557 int err;
2558 do {
2559 err = nfs4_handle_exception(server,
2560 _nfs4_proc_getattr(server, fhandle, fattr),
2561 &exception);
2562 } while (exception.retry);
2563 return err;
2564}
2565
2566/*
2567 * The file is not closed if it is opened due to the a request to change
2568 * the size of the file. The open call will not be needed once the
2569 * VFS layer lookup-intents are implemented.
2570 *
2571 * Close is called when the inode is destroyed.
2572 * If we haven't opened the file for O_WRONLY, we
2573 * need to in the size_change case to obtain a stateid.
2574 *
2575 * Got race?
2576 * Because OPEN is always done by name in nfsv4, it is
2577 * possible that we opened a different file by the same
2578 * name. We can recognize this race condition, but we
2579 * can't do anything about it besides returning an error.
2580 *
2581 * This will be fixed with VFS changes (lookup-intent).
2582 */
2583static int
2584nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2585 struct iattr *sattr)
2586{
08e9eac4 2587 struct inode *inode = dentry->d_inode;
659bfcd6 2588 struct rpc_cred *cred = NULL;
d530838b 2589 struct nfs4_state *state = NULL;
1da177e4
LT		 2590 int status;
2591
8a1636c4
BH		 2592 if (pnfs_ld_layoutret_on_setattr(inode))
2593 pnfs_return_layout(inode);
2594
0e574af1 2595 nfs_fattr_init(fattr);
1da177e4 2596
2669940d
AA		 2597 /* Deal with open(O_TRUNC) */
2598 if (sattr->ia_valid & ATTR_OPEN)
2599 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2600
2601 /* Optimization: if the end result is no change, don't RPC */
2602 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2603 return 0;
2604
d530838b 2605 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2606 if (sattr->ia_valid & ATTR_FILE) {
2607 struct nfs_open_context *ctx;
2608
2609 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2610 if (ctx) {
2611 cred = ctx->cred;
2612 state = ctx->state;
2613 }
659bfcd6 2614 }
08e9eac4 2615
659bfcd6 2616 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2617 if (status == 0)
2618 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2619 return status;
2620}
2621
0c2e53f1
TM		 2622static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2623 const struct qstr *name, struct nfs_fh *fhandle,
2624 struct nfs_fattr *fattr)
2b3de441 2625{
0c2e53f1 2626 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2627 int status;
2628 struct nfs4_lookup_arg args = {
2629 .bitmask = server->attr_bitmask,
0c2e53f1 2630 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2631 .name = name,
2632 };
2633 struct nfs4_lookup_res res = {
2634 .server = server,
2635 .fattr = fattr,
2636 .fh = fhandle,
2637 };
2638 struct rpc_message msg = {
2639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2640 .rpc_argp = &args,
2641 .rpc_resp = &res,
2642 };
2643
2644 nfs_fattr_init(fattr);
2645
1da177e4 2646 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2647 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2648 dprintk("NFS reply lookup: %d\n", status);
2649 return status;
2650}
2651
72de53ec 2652static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2653{
7ebb9315 2654 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2655 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2656 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2657 fattr->nlink = 2;
2658}
2659
72de53ec
BS		 2660static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2661 struct qstr *name, struct nfs_fh *fhandle,
2662 struct nfs_fattr *fattr)
1da177e4
LT		 2663{
2664 struct nfs4_exception exception = { };
72de53ec 2665 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2666 int err;
2667 do {
72de53ec
BS		 2668 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2669 switch (err) {
08ef7bd3 2670 case -NFS4ERR_BADNAME:
72de53ec
BS		 2671 err = -ENOENT;
2672 goto out;
0c2e53f1 2673 case -NFS4ERR_MOVED:
f05d147f 2674 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2675 goto out;
0c2e53f1 2676 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2677 err = -EPERM;
2678 if (client != *clnt)
2679 goto out;
2680
2681 client = nfs4_create_sec_client(client, dir, name);
2682 if (IS_ERR(client))
2683 return PTR_ERR(client);
2684
2685 exception.retry = 1;
2686 break;
2687 default:
2688 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2689 }
1da177e4 2690 } while (exception.retry);
72de53ec
BS		 2691
2692out:
2693 if (err == 0)
2694 *clnt = client;
2695 else if (client != *clnt)
2696 rpc_shutdown_client(client);
2697
1da177e4
LT		 2698 return err;
2699}
2700
80a16b21 2701static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2702 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2703{
2704 int status;
2705 struct rpc_clnt *client = NFS_CLIENT(dir);
2706
2707 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2708 if (client != NFS_CLIENT(dir)) {
2709 rpc_shutdown_client(client);
2710 nfs_fixup_secinfo_attributes(fattr);
2711 }
2712 return status;
2713}
2714
f05d147f
BS		 2715struct rpc_clnt *
2716nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2717 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2718{
2719 int status;
2720 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2721
2722 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2723 if (status < 0) {
2724 rpc_shutdown_client(client);
2725 return ERR_PTR(status);
2726 }
2727 return client;
2728}
2729
1da177e4
LT		 2730static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2731{
76b32999 2732 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2733 struct nfs4_accessargs args = {
2734 .fh = NFS_FH(inode),
a4980e78 2735 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2736 };
2737 struct nfs4_accessres res = {
2738 .server = server,
1da177e4 2739 };
1da177e4
LT		 2740 struct rpc_message msg = {
2741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2742 .rpc_argp = &args,
2743 .rpc_resp = &res,
2744 .rpc_cred = entry->cred,
2745 };
2746 int mode = entry->mask;
2747 int status;
2748
2749 /*
2750 * Determine which access bits we want to ask for...
2751 */
2752 if (mode & MAY_READ)
2753 args.access |= NFS4_ACCESS_READ;
2754 if (S_ISDIR(inode->i_mode)) {
2755 if (mode & MAY_WRITE)
2756 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2757 if (mode & MAY_EXEC)
2758 args.access |= NFS4_ACCESS_LOOKUP;
2759 } else {
2760 if (mode & MAY_WRITE)
2761 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2762 if (mode & MAY_EXEC)
2763 args.access |= NFS4_ACCESS_EXECUTE;
2764 }
c407d41a
TM		 2765
2766 res.fattr = nfs_alloc_fattr();
2767 if (res.fattr == NULL)
2768 return -ENOMEM;
2769
7c513058 2770 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2771 if (!status) {
2772 entry->mask = 0;
2773 if (res.access & NFS4_ACCESS_READ)
2774 entry->mask |= MAY_READ;
2775 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2776 entry->mask |= MAY_WRITE;
2777 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2778 entry->mask |= MAY_EXEC;
c407d41a 2779 nfs_refresh_inode(inode, res.fattr);
1da177e4 2780 }
c407d41a 2781 nfs_free_fattr(res.fattr);
1da177e4
LT		 2782 return status;
2783}
2784
2785static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2786{
2787 struct nfs4_exception exception = { };
2788 int err;
2789 do {
2790 err = nfs4_handle_exception(NFS_SERVER(inode),
2791 _nfs4_proc_access(inode, entry),
2792 &exception);
2793 } while (exception.retry);
2794 return err;
2795}
2796
2797/*
2798 * TODO: For the time being, we don't try to get any attributes
2799 * along with any of the zero-copy operations READ, READDIR,
2800 * READLINK, WRITE.
2801 *
2802 * In the case of the first three, we want to put the GETATTR
2803 * after the read-type operation -- this is because it is hard
2804 * to predict the length of a GETATTR response in v4, and thus
2805 * align the READ data correctly. This means that the GETATTR
2806 * may end up partially falling into the page cache, and we should
2807 * shift it into the 'tail' of the xdr_buf before processing.
2808 * To do this efficiently, we need to know the total length
2809 * of data received, which doesn't seem to be available outside
2810 * of the RPC layer.
2811 *
2812 * In the case of WRITE, we also want to put the GETATTR after
2813 * the operation -- in this case because we want to make sure
140150db 2814 * we get the post-operation mtime and size.
1da177e4
LT		 2815 *
2816 * Both of these changes to the XDR layer would in fact be quite
2817 * minor, but I decided to leave them for a subsequent patch.
2818 */
2819static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2820 unsigned int pgbase, unsigned int pglen)
2821{
2822 struct nfs4_readlink args = {
2823 .fh = NFS_FH(inode),
2824 .pgbase = pgbase,
2825 .pglen = pglen,
2826 .pages = &page,
2827 };
f50c7000 2828 struct nfs4_readlink_res res;
1da177e4
LT		 2829 struct rpc_message msg = {
2830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2831 .rpc_argp = &args,
f50c7000 2832 .rpc_resp = &res,
1da177e4
LT		 2833 };
2834
7c513058 2835 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2836}
2837
2838static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2839 unsigned int pgbase, unsigned int pglen)
2840{
2841 struct nfs4_exception exception = { };
2842 int err;
2843 do {
2844 err = nfs4_handle_exception(NFS_SERVER(inode),
2845 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2846 &exception);
2847 } while (exception.retry);
2848 return err;
2849}
2850
1da177e4 2851/*
8867fe58 2852 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2853 */
1da177e4
LT		 2854static int
2855nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2856 int flags)
1da177e4 2857{
8867fe58 2858 struct nfs_open_context *ctx;
1da177e4 2859 struct nfs4_state *state;
1da177e4
LT		 2860 int status = 0;
2861
8867fe58
MS		 2862 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2863 if (IS_ERR(ctx))
2864 return PTR_ERR(ctx);
2865
a8a5da99 2866 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2867 state = nfs4_do_open(dir, dentry, ctx->mode,
2868 flags, sattr, ctx->cred,
2869 &ctx->mdsthreshold);
d4d9cdcb 2870 d_drop(dentry);
1da177e4
LT		 2871 if (IS_ERR(state)) {
2872 status = PTR_ERR(state);
c0204fd2 2873 goto out;
1da177e4 2874 }
d4d9cdcb 2875 d_add(dentry, igrab(state->inode));
d75340cc 2876 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2877 ctx->state = state;
1da177e4 2878out:
8867fe58 2879 put_nfs_open_context(ctx);
1da177e4
LT		 2880 return status;
2881}
2882
2883static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2884{
16e42959 2885 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2886 struct nfs_removeargs args = {
1da177e4 2887 .fh = NFS_FH(dir),
26fe5750 2888 .name = *name,
16e42959 2889 };
4fdc17b2 2890 struct nfs_removeres res = {
16e42959 2891 .server = server,
1da177e4 2892 };
1da177e4 2893 struct rpc_message msg = {
4fdc17b2
TM		 2894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2895 .rpc_argp = &args,
2896 .rpc_resp = &res,
1da177e4 2897 };
778d2817 2898 int status;
1da177e4 2899
7c513058 2900 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2901 if (status == 0)
16e42959 2902 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2903 return status;
2904}
2905
2906static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2907{
2908 struct nfs4_exception exception = { };
2909 int err;
2910 do {
2911 err = nfs4_handle_exception(NFS_SERVER(dir),
2912 _nfs4_proc_remove(dir, name),
2913 &exception);
2914 } while (exception.retry);
2915 return err;
2916}
2917
e4eff1a6 2918static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2919{
e4eff1a6
TM		 2920 struct nfs_server *server = NFS_SERVER(dir);
2921 struct nfs_removeargs *args = msg->rpc_argp;
2922 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2923
e4eff1a6 2924 res->server = server;
1da177e4 2925 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2926 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2927}
2928
34e137cc
BS		 2929static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2930{
2931 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2932 &data->args.seq_args,
2933 &data->res.seq_res,
2934 task))
2935 return;
2936 rpc_call_start(task);
1da177e4
LT		 2937}
2938
e4eff1a6 2939static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2940{
e4eff1a6
TM		 2941 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2942
14516c3a
TM		 2943 if (!nfs4_sequence_done(task, &res->seq_res))
2944 return 0;
9e33bed5 2945 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2946 return 0;
2947 update_changeattr(dir, &res->cinfo);
e4eff1a6 2948 return 1;
1da177e4
LT		 2949}
2950
d3d4152a
JL		 2951static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2952{
2953 struct nfs_server *server = NFS_SERVER(dir);
2954 struct nfs_renameargs *arg = msg->rpc_argp;
2955 struct nfs_renameres *res = msg->rpc_resp;
2956
2957 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2958 res->server = server;
9d12b216 2959 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2960}
2961
c6bfa1a1
BS		 2962static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2963{
2964 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2965 &data->args.seq_args,
2966 &data->res.seq_res,
2967 task))
2968 return;
2969 rpc_call_start(task);
d3d4152a
JL		 2970}
2971
2972static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2973 struct inode *new_dir)
2974{
2975 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2976
2977 if (!nfs4_sequence_done(task, &res->seq_res))
2978 return 0;
2979 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2980 return 0;
2981
2982 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2983 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2984 return 1;
2985}
2986
1da177e4
LT		 2987static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2988 struct inode *new_dir, struct qstr *new_name)
2989{
6caf2c82 2990 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2991 struct nfs_renameargs arg = {
1da177e4
LT		 2992 .old_dir = NFS_FH(old_dir),
2993 .new_dir = NFS_FH(new_dir),
2994 .old_name = old_name,
2995 .new_name = new_name,
6caf2c82 2996 };
e8582a8b 2997 struct nfs_renameres res = {
6caf2c82 2998 .server = server,
1da177e4 2999 };
1da177e4
LT		 3000 struct rpc_message msg = {
3001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3002 .rpc_argp = &arg,
3003 .rpc_resp = &res,
3004 };
011fff72 3005 int status = -ENOMEM;
1da177e4 3006
7c513058 3007 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3008 if (!status) {
3009 update_changeattr(old_dir, &res.old_cinfo);
3010 update_changeattr(new_dir, &res.new_cinfo);
3011 }
3012 return status;
3013}
3014
3015static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3016 struct inode *new_dir, struct qstr *new_name)
3017{
3018 struct nfs4_exception exception = { };
3019 int err;
3020 do {
3021 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3022 _nfs4_proc_rename(old_dir, old_name,
3023 new_dir, new_name),
3024 &exception);
3025 } while (exception.retry);
3026 return err;
3027}
3028
3029static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3030{
91ba2eee 3031 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3032 struct nfs4_link_arg arg = {
3033 .fh = NFS_FH(inode),
3034 .dir_fh = NFS_FH(dir),
3035 .name = name,
91ba2eee
TM		 3036 .bitmask = server->attr_bitmask,
3037 };
91ba2eee
TM		 3038 struct nfs4_link_res res = {
3039 .server = server,
1da177e4 3040 };
1da177e4
LT		 3041 struct rpc_message msg = {
3042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3043 .rpc_argp = &arg,
91ba2eee 3044 .rpc_resp = &res,
1da177e4 3045 };
136f2627
TM		 3046 int status = -ENOMEM;
3047
3048 res.fattr = nfs_alloc_fattr();
778d2817 3049 if (res.fattr == NULL)
136f2627 3050 goto out;
1da177e4 3051
7c513058 3052 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3053 if (!status) {
3054 update_changeattr(dir, &res.cinfo);
73a3d07c 3055 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3056 }
136f2627 3057out:
136f2627 3058 nfs_free_fattr(res.fattr);
1da177e4
LT		 3059 return status;
3060}
3061
3062static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3063{
3064 struct nfs4_exception exception = { };
3065 int err;
3066 do {
3067 err = nfs4_handle_exception(NFS_SERVER(inode),
3068 _nfs4_proc_link(inode, dir, name),
3069 &exception);
3070 } while (exception.retry);
3071 return err;
3072}
3073
57dc9a57
TM		 3074struct nfs4_createdata {
3075 struct rpc_message msg;
3076 struct nfs4_create_arg arg;
3077 struct nfs4_create_res res;
3078 struct nfs_fh fh;
3079 struct nfs_fattr fattr;
57dc9a57
TM		 3080};
3081
3082static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3083 struct qstr *name, struct iattr *sattr, u32 ftype)
3084{
3085 struct nfs4_createdata *data;
3086
3087 data = kzalloc(sizeof(*data), GFP_KERNEL);
3088 if (data != NULL) {
3089 struct nfs_server *server = NFS_SERVER(dir);
3090
3091 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3092 data->msg.rpc_argp = &data->arg;
3093 data->msg.rpc_resp = &data->res;
3094 data->arg.dir_fh = NFS_FH(dir);
3095 data->arg.server = server;
3096 data->arg.name = name;
3097 data->arg.attrs = sattr;
3098 data->arg.ftype = ftype;
3099 data->arg.bitmask = server->attr_bitmask;
3100 data->res.server = server;
3101 data->res.fh = &data->fh;
3102 data->res.fattr = &data->fattr;
57dc9a57 3103 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3104 }
3105 return data;
3106}
3107
3108static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3109{
7c513058 3110 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3111 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3112 if (status == 0) {
3113 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3114 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3115 }
3116 return status;
3117}
3118
3119static void nfs4_free_createdata(struct nfs4_createdata *data)
3120{
3121 kfree(data);
3122}
3123
4f390c15 3124static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3125 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3126{
57dc9a57
TM		 3127 struct nfs4_createdata *data;
3128 int status = -ENAMETOOLONG;
1da177e4 3129
94a6d753 3130 if (len > NFS4_MAXPATHLEN)
57dc9a57 3131 goto out;
4f390c15 3132
57dc9a57
TM		 3133 status = -ENOMEM;
3134 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3135 if (data == NULL)
3136 goto out;
3137
3138 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3139 data->arg.u.symlink.pages = &page;
3140 data->arg.u.symlink.len = len;
1da177e4 3141
57dc9a57
TM		 3142 status = nfs4_do_create(dir, dentry, data);
3143
3144 nfs4_free_createdata(data);
3145out:
1da177e4
LT		 3146 return status;
3147}
3148
4f390c15 3149static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3150 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3151{
3152 struct nfs4_exception exception = { };
3153 int err;
3154 do {
3155 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3156 _nfs4_proc_symlink(dir, dentry, page,
3157 len, sattr),
1da177e4
LT		 3158 &exception);
3159 } while (exception.retry);
3160 return err;
3161}
3162
3163static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3164 struct iattr *sattr)
3165{
57dc9a57
TM		 3166 struct nfs4_createdata *data;
3167 int status = -ENOMEM;
1da177e4 3168
57dc9a57
TM		 3169 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3170 if (data == NULL)
3171 goto out;
3172
3173 status = nfs4_do_create(dir, dentry, data);
3174
3175 nfs4_free_createdata(data);
3176out:
1da177e4
LT		 3177 return status;
3178}
3179
3180static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3181 struct iattr *sattr)
3182{
3183 struct nfs4_exception exception = { };
3184 int err;
a8a5da99
AK		 3185
3186 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3187 do {
3188 err = nfs4_handle_exception(NFS_SERVER(dir),
3189 _nfs4_proc_mkdir(dir, dentry, sattr),
3190 &exception);
3191 } while (exception.retry);
3192 return err;
3193}
3194
3195static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3196 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3197{
3198 struct inode *dir = dentry->d_inode;
3199 struct nfs4_readdir_arg args = {
3200 .fh = NFS_FH(dir),
56e4ebf8 3201 .pages = pages,
1da177e4
LT		 3202 .pgbase = 0,
3203 .count = count,
96d25e53 3204 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3205 .plus = plus,
1da177e4
LT		 3206 };
3207 struct nfs4_readdir_res res;
3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3210 .rpc_argp = &args,
3211 .rpc_resp = &res,
3212 .rpc_cred = cred,
3213 };
3214 int status;
3215
3110ff80 3216 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3217 dentry->d_parent->d_name.name,
3218 dentry->d_name.name,
3219 (unsigned long long)cookie);
c3f52af3 3220 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3221 res.pgbase = args.pgbase;
7c513058 3222 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3223 if (status >= 0) {
c3f52af3 3224 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3225 status += args.pgbase;
3226 }
c4812998
TM		 3227
3228 nfs_invalidate_atime(dir);
3229
3110ff80 3230 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3231 return status;
3232}
3233
3234static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3235 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3236{
3237 struct nfs4_exception exception = { };
3238 int err;
3239 do {
3240 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3241 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3242 pages, count, plus),
1da177e4
LT		 3243 &exception);
3244 } while (exception.retry);
3245 return err;
3246}
3247
3248static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3249 struct iattr *sattr, dev_t rdev)
3250{
57dc9a57
TM		 3251 struct nfs4_createdata *data;
3252 int mode = sattr->ia_mode;
3253 int status = -ENOMEM;
1da177e4
LT		 3254
3255 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3256 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3257
3258 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3259 if (data == NULL)
3260 goto out;
3261
1da177e4 3262 if (S_ISFIFO(mode))
57dc9a57 3263 data->arg.ftype = NF4FIFO;
1da177e4 3264 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3265 data->arg.ftype = NF4BLK;
3266 data->arg.u.device.specdata1 = MAJOR(rdev);
3267 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3268 }
3269 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3270 data->arg.ftype = NF4CHR;
3271 data->arg.u.device.specdata1 = MAJOR(rdev);
3272 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3273 }
1da177e4 3274
57dc9a57
TM		 3275 status = nfs4_do_create(dir, dentry, data);
3276
3277 nfs4_free_createdata(data);
3278out:
1da177e4
LT		 3279 return status;
3280}
3281
3282static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3283 struct iattr *sattr, dev_t rdev)
3284{
3285 struct nfs4_exception exception = { };
3286 int err;
a8a5da99
AK		 3287
3288 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3289 do {
3290 err = nfs4_handle_exception(NFS_SERVER(dir),
3291 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3292 &exception);
3293 } while (exception.retry);
3294 return err;
3295}
3296
3297static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3298 struct nfs_fsstat *fsstat)
3299{
3300 struct nfs4_statfs_arg args = {
3301 .fh = fhandle,
3302 .bitmask = server->attr_bitmask,
3303 };
24ad148a
BH		 3304 struct nfs4_statfs_res res = {
3305 .fsstat = fsstat,
3306 };
1da177e4
LT		 3307 struct rpc_message msg = {
3308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3309 .rpc_argp = &args,
24ad148a 3310 .rpc_resp = &res,
1da177e4
LT		 3311 };
3312
0e574af1 3313 nfs_fattr_init(fsstat->fattr);
7c513058 3314 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3315}
3316
3317static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3318{
3319 struct nfs4_exception exception = { };
3320 int err;
3321 do {
3322 err = nfs4_handle_exception(server,
3323 _nfs4_proc_statfs(server, fhandle, fsstat),
3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327}
3328
3329static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3330 struct nfs_fsinfo *fsinfo)
3331{
3332 struct nfs4_fsinfo_arg args = {
3333 .fh = fhandle,
3334 .bitmask = server->attr_bitmask,
3335 };
3dda5e43
BH		 3336 struct nfs4_fsinfo_res res = {
3337 .fsinfo = fsinfo,
3338 };
1da177e4
LT		 3339 struct rpc_message msg = {
3340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3341 .rpc_argp = &args,
3dda5e43 3342 .rpc_resp = &res,
1da177e4
LT		 3343 };
3344
7c513058 3345 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3346}
3347
3348static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3349{
3350 struct nfs4_exception exception = { };
3351 int err;
3352
3353 do {
3354 err = nfs4_handle_exception(server,
3355 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3356 &exception);
3357 } while (exception.retry);
3358 return err;
3359}
3360
3361static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3362{
e38eb650
BS		 3363 int error;
3364
0e574af1 3365 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3366 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3367 if (error == 0)
3368 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3369
3370 return error;
1da177e4
LT		 3371}
3372
3373static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3374 struct nfs_pathconf *pathconf)
3375{
3376 struct nfs4_pathconf_arg args = {
3377 .fh = fhandle,
3378 .bitmask = server->attr_bitmask,
3379 };
d45b2989
BH		 3380 struct nfs4_pathconf_res res = {
3381 .pathconf = pathconf,
3382 };
1da177e4
LT		 3383 struct rpc_message msg = {
3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3385 .rpc_argp = &args,
d45b2989 3386 .rpc_resp = &res,
1da177e4
LT		 3387 };
3388
3389 /* None of the pathconf attributes are mandatory to implement */
3390 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3391 memset(pathconf, 0, sizeof(*pathconf));
3392 return 0;
3393 }
3394
0e574af1 3395 nfs_fattr_init(pathconf->fattr);
7c513058 3396 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3397}
3398
3399static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3400 struct nfs_pathconf *pathconf)
3401{
3402 struct nfs4_exception exception = { };
3403 int err;
3404
3405 do {
3406 err = nfs4_handle_exception(server,
3407 _nfs4_proc_pathconf(server, fhandle, pathconf),
3408 &exception);
3409 } while (exception.retry);
3410 return err;
3411}
3412
d20581aa
BH		 3413void __nfs4_read_done_cb(struct nfs_read_data *data)
3414{
cd841605 3415 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3416}
3417
cbdabc7f 3418static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3419{
cd841605 3420 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3421
9e33bed5 3422 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3423 rpc_restart_call_prepare(task);
ec06c096 3424 return -EAGAIN;
1da177e4 3425 }
8850df99 3426
d20581aa 3427 __nfs4_read_done_cb(data);
1da177e4 3428 if (task->tk_status > 0)
ec06c096
TM		 3429 renew_lease(server, data->timestamp);
3430 return 0;
1da177e4
LT		 3431}
3432
cbdabc7f
AA		 3433static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3434{
3435
3436 dprintk("--> %s\n", __func__);
3437
3438 if (!nfs4_sequence_done(task, &data->res.seq_res))
3439 return -EAGAIN;
3440
d20581aa
BH		 3441 return data->read_done_cb ? data->read_done_cb(task, data) :
3442 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3443}
3444
bdc7f021 3445static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3446{
1da177e4 3447 data->timestamp = jiffies;
cbdabc7f 3448 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3449 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3450 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3451}
3452
ea7c3303
BS		 3453static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3454{
cd841605 3455 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3456 &data->args.seq_args,
3457 &data->res.seq_res,
3458 task))
3459 return;
3460 rpc_call_start(task);
1da177e4
LT		 3461}
3462
b029bc9b 3463static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3464{
cd841605 3465 struct inode *inode = data->header->inode;
1da177e4 3466
9e33bed5 3467 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3468 rpc_restart_call_prepare(task);
788e7a89 3469 return -EAGAIN;
1da177e4 3470 }
4f9838c7 3471 if (task->tk_status >= 0) {
1da177e4 3472 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3473 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3474 }
788e7a89 3475 return 0;
1da177e4
LT		 3476}
3477
b029bc9b
FI		 3478static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3479{
3480 if (!nfs4_sequence_done(task, &data->res.seq_res))
3481 return -EAGAIN;
d20581aa
BH		 3482 return data->write_done_cb ? data->write_done_cb(task, data) :
3483 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3484}
3485
5a37f851
TM		 3486static
3487bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3488{
5a37f851
TM		 3489 const struct nfs_pgio_header *hdr = data->header;
3490
3491 /* Don't request attributes for pNFS or O_DIRECT writes */
3492 if (data->ds_clp != NULL || hdr->dreq != NULL)
3493 return false;
3494 /* Otherwise, request attributes if and only if we don't hold
3495 * a delegation
3496 */
011e2a7f 3497 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3498}
a69aef14 3499
bdc7f021 3500static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3501{
cd841605 3502 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3503
5a37f851 3504 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3505 data->args.bitmask = NULL;
3506 data->res.fattr = NULL;
3507 } else
3508 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3509
b029bc9b
FI		 3510 if (!data->write_done_cb)
3511 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3512 data->res.server = server;
1da177e4
LT		 3513 data->timestamp = jiffies;
3514
bdc7f021 3515 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3516 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3517}
3518
c6cb80d0
BS		 3519static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3520{
cd841605 3521 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3522 &data->args.seq_args,
3523 &data->res.seq_res,
3524 task))
3525 return;
3526 rpc_call_start(task);
1da177e4
LT		 3527}
3528
0b7c0153 3529static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3530{
3531 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3532 &data->args.seq_args,
3533 &data->res.seq_res,
3534 task))
3535 return;
3536 rpc_call_start(task);
1da177e4
LT		 3537}
3538
0b7c0153 3539static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3540{
1da177e4 3541 struct inode *inode = data->inode;
14516c3a 3542
9e33bed5 3543 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3544 rpc_restart_call_prepare(task);
788e7a89 3545 return -EAGAIN;
1da177e4 3546 }
788e7a89 3547 return 0;
1da177e4
LT		 3548}
3549
0b7c0153 3550static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3551{
3552 if (!nfs4_sequence_done(task, &data->res.seq_res))
3553 return -EAGAIN;
0b7c0153 3554 return data->commit_done_cb(task, data);
5f452431
FI		 3555}
3556
0b7c0153 3557static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3558{
788e7a89 3559 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3560
0b7c0153
FI		 3561 if (data->commit_done_cb == NULL)
3562 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3563 data->res.server = server;
bdc7f021 3564 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3565 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3566}
3567
9bc4e3ca
CL		 3568struct nfs4_renewdata {
3569 struct nfs_client *client;
3570 unsigned long timestamp;
3571};
3572
1da177e4
LT		 3573/*
3574 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3575 * standalone procedure for queueing an asynchronous RENEW.
3576 */
9bc4e3ca 3577static void nfs4_renew_release(void *calldata)
dc96aef9 3578{
9bc4e3ca
CL		 3579 struct nfs4_renewdata *data = calldata;
3580 struct nfs_client *clp = data->client;
dc96aef9 3581
0851de06
AB		 3582 if (atomic_read(&clp->cl_count) > 1)
3583 nfs4_schedule_state_renewal(clp);
3584 nfs_put_client(clp);
9bc4e3ca 3585 kfree(data);
dc96aef9
AB		 3586}
3587
9bc4e3ca 3588static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3589{
9bc4e3ca
CL		 3590 struct nfs4_renewdata *data = calldata;
3591 struct nfs_client *clp = data->client;
3592 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3593
3594 if (task->tk_status < 0) {
95baa25c 3595 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3596 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3597 return;
3598 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3599 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3600 return;
3601 }
3602 nfs4_schedule_path_down_recovery(clp);
1da177e4 3603 }
452e9352 3604 do_renew_lease(clp, timestamp);
1da177e4
LT		 3605}
3606
963d8fe5
TM		 3607static const struct rpc_call_ops nfs4_renew_ops = {
3608 .rpc_call_done = nfs4_renew_done,
dc96aef9 3609 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3610};
3611
2f60ea6b 3612static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3613{
3614 struct rpc_message msg = {
3615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3616 .rpc_argp = clp,
b4454fe1 3617 .rpc_cred = cred,
1da177e4 3618 };
9bc4e3ca 3619 struct nfs4_renewdata *data;
1da177e4 3620
2f60ea6b
TM		 3621 if (renew_flags == 0)
3622 return 0;
0851de06
AB		 3623 if (!atomic_inc_not_zero(&clp->cl_count))
3624 return -EIO;
b569ad34 3625 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3626 if (data == NULL)
3627 return -ENOMEM;
3628 data->client = clp;
3629 data->timestamp = jiffies;
1da177e4 3630 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3631 &nfs4_renew_ops, data);
1da177e4
LT		 3632}
3633
8534d4ec 3634static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3635{
3636 struct rpc_message msg = {
3637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3638 .rpc_argp = clp,
b4454fe1 3639 .rpc_cred = cred,
1da177e4
LT		 3640 };
3641 unsigned long now = jiffies;
3642 int status;
3643
3644 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3645 if (status < 0)
3646 return status;
452e9352 3647 do_renew_lease(clp, now);
1da177e4
LT		 3648 return 0;
3649}
3650
aa1870af
BF		 3651static inline int nfs4_server_supports_acls(struct nfs_server *server)
3652{
3653 return (server->caps & NFS_CAP_ACLS)
3654 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3655 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3656}
3657
21f498c2
TM		 3658/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3659 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3660 * the stack.
3661 */
21f498c2 3662#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3663
e9e3d724
NH		 3664static int buf_to_pages_noslab(const void *buf, size_t buflen,
3665 struct page **pages, unsigned int *pgbase)
3666{
3667 struct page *newpage, **spages;
3668 int rc = 0;
3669 size_t len;
3670 spages = pages;
3671
3672 do {
21f498c2 3673 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3674 newpage = alloc_page(GFP_KERNEL);
3675
3676 if (newpage == NULL)
3677 goto unwind;
3678 memcpy(page_address(newpage), buf, len);
3679 buf += len;
3680 buflen -= len;
3681 *pages++ = newpage;
3682 rc++;
3683 } while (buflen != 0);
3684
3685 return rc;
3686
3687unwind:
3688 for(; rc > 0; rc--)
3689 __free_page(spages[rc-1]);
3690 return -ENOMEM;
3691}
3692
e50a1c2e
BF		 3693struct nfs4_cached_acl {
3694 int cached;
3695 size_t len;
3e9d4154 3696 char data[0];
e50a1c2e
BF		 3697};
3698
3699static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3700{
3701 struct nfs_inode *nfsi = NFS_I(inode);
3702
3703 spin_lock(&inode->i_lock);
3704 kfree(nfsi->nfs4_acl);
3705 nfsi->nfs4_acl = acl;
3706 spin_unlock(&inode->i_lock);
3707}
3708
3709static void nfs4_zap_acl_attr(struct inode *inode)
3710{
3711 nfs4_set_cached_acl(inode, NULL);
3712}
3713
3714static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3715{
3716 struct nfs_inode *nfsi = NFS_I(inode);
3717 struct nfs4_cached_acl *acl;
3718 int ret = -ENOENT;
3719
3720 spin_lock(&inode->i_lock);
3721 acl = nfsi->nfs4_acl;
3722 if (acl == NULL)
3723 goto out;
3724 if (buf == NULL) /* user is just asking for length */
3725 goto out_len;
3726 if (acl->cached == 0)
3727 goto out;
3728 ret = -ERANGE; /* see getxattr(2) man page */
3729 if (acl->len > buflen)
3730 goto out;
3731 memcpy(buf, acl->data, acl->len);
3732out_len:
3733 ret = acl->len;
3734out:
3735 spin_unlock(&inode->i_lock);
3736 return ret;
3737}
3738
5794d21e 3739static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3740{
3741 struct nfs4_cached_acl *acl;
b291f1b1 3742 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3743
1f1ea6c2 3744 if (buflen <= PAGE_SIZE) {
b291f1b1 3745 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3746 if (acl == NULL)
3747 goto out;
3748 acl->cached = 1;
5794d21e 3749 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3750 } else {
3751 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3752 if (acl == NULL)
3753 goto out;
3754 acl->cached = 0;
3755 }
3756 acl->len = acl_len;
3757out:
3758 nfs4_set_cached_acl(inode, acl);
3759}
3760
bf118a34
AA		 3761/*
3762 * The getxattr API returns the required buffer length when called with a
3763 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3764 * the required buf. On a NULL buf, we send a page of data to the server
3765 * guessing that the ACL request can be serviced by a page. If so, we cache
3766 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3767 * the cache. If not so, we throw away the page, and cache the required
3768 * length. The next getxattr call will then produce another round trip to
3769 * the server, this time with the input buf of the required size.
3770 */
16b4289c 3771static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3772{
bf118a34 3773 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3774 struct nfs_getaclargs args = {
3775 .fh = NFS_FH(inode),
3776 .acl_pages = pages,
3777 .acl_len = buflen,
3778 };
663c79b3
BH		 3779 struct nfs_getaclres res = {
3780 .acl_len = buflen,
3781 };
aa1870af
BF		 3782 struct rpc_message msg = {
3783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3784 .rpc_argp = &args,
663c79b3 3785 .rpc_resp = &res,
aa1870af 3786 };
21f498c2
TM		 3787 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3788 int ret = -ENOMEM, i;
aa1870af 3789
bf118a34
AA		 3790 /* As long as we're doing a round trip to the server anyway,
3791 * let's be prepared for a page of acl data. */
3792 if (npages == 0)
3793 npages = 1;
21f498c2
TM		 3794 if (npages > ARRAY_SIZE(pages))
3795 return -ERANGE;
5a006899 3796
bf118a34
AA		 3797 for (i = 0; i < npages; i++) {
3798 pages[i] = alloc_page(GFP_KERNEL);
3799 if (!pages[i])
3800 goto out_free;
e50a1c2e 3801 }
5a006899
SP		 3802
3803 /* for decoding across pages */
3804 res.acl_scratch = alloc_page(GFP_KERNEL);
3805 if (!res.acl_scratch)
3806 goto out_free;
3807
bf118a34
AA		 3808 args.acl_len = npages * PAGE_SIZE;
3809 args.acl_pgbase = 0;
5a006899 3810
de040bec 3811 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3812 __func__, buf, buflen, npages, args.acl_len);
3813 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3814 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3815 if (ret)
3816 goto out_free;
bf118a34 3817
1f1ea6c2
TM		 3818 /* Handle the case where the passed-in buffer is too short */
3819 if (res.acl_flags & NFS4_ACL_TRUNC) {
3820 /* Did the user only issue a request for the acl length? */
3821 if (buf == NULL)
3822 goto out_ok;
e50a1c2e 3823 ret = -ERANGE;
1f1ea6c2 3824 goto out_free;
e50a1c2e 3825 }
1f1ea6c2
TM		 3826 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3827 if (buf)
3828 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3829out_ok:
3830 ret = res.acl_len;
e50a1c2e 3831out_free:
bf118a34
AA		 3832 for (i = 0; i < npages; i++)
3833 if (pages[i])
3834 __free_page(pages[i]);
331818f1
TM		 3835 if (res.acl_scratch)
3836 __free_page(res.acl_scratch);
aa1870af
BF		 3837 return ret;
3838}
3839
16b4289c
TM		 3840static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3841{
3842 struct nfs4_exception exception = { };
3843 ssize_t ret;
3844 do {
3845 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3846 if (ret >= 0)
3847 break;
3848 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3849 } while (exception.retry);
3850 return ret;
3851}
3852
e50a1c2e
BF		 3853static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3854{
3855 struct nfs_server *server = NFS_SERVER(inode);
3856 int ret;
3857
3858 if (!nfs4_server_supports_acls(server))
3859 return -EOPNOTSUPP;
3860 ret = nfs_revalidate_inode(server, inode);
3861 if (ret < 0)
3862 return ret;
08a22b39
AK		 3863 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3864 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3865 ret = nfs4_read_cached_acl(inode, buf, buflen);
3866 if (ret != -ENOENT)
bf118a34
AA		 3867 /* -ENOENT is returned if there is no ACL or if there is an ACL
3868 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3869 return ret;
3870 return nfs4_get_acl_uncached(inode, buf, buflen);
3871}
3872
16b4289c 3873static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3874{
3875 struct nfs_server *server = NFS_SERVER(inode);
3876 struct page *pages[NFS4ACL_MAXPAGES];
3877 struct nfs_setaclargs arg = {
3878 .fh = NFS_FH(inode),
3879 .acl_pages = pages,
3880 .acl_len = buflen,
3881 };
73c403a9 3882 struct nfs_setaclres res;
4b580ee3
BF		 3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3885 .rpc_argp = &arg,
73c403a9 3886 .rpc_resp = &res,
4b580ee3 3887 };
21f498c2 3888 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3889 int ret, i;
4b580ee3
BF		 3890
3891 if (!nfs4_server_supports_acls(server))
3892 return -EOPNOTSUPP;
21f498c2
TM		 3893 if (npages > ARRAY_SIZE(pages))
3894 return -ERANGE;
e9e3d724
NH		 3895 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3896 if (i < 0)
3897 return i;
57ec14c5 3898 nfs4_inode_return_delegation(inode);
7c513058 3899 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3900
3901 /*
3902 * Free each page after tx, so the only ref left is
3903 * held by the network stack
3904 */
3905 for (; i > 0; i--)
3906 put_page(pages[i-1]);
3907
08a22b39
AK		 3908 /*
3909 * Acl update can result in inode attribute update.
3910 * so mark the attribute cache invalid.
3911 */
3912 spin_lock(&inode->i_lock);
3913 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3914 spin_unlock(&inode->i_lock);
f41f7418
TM		 3915 nfs_access_zap_cache(inode);
3916 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3917 return ret;
3918}
3919
16b4289c
TM		 3920static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3921{
3922 struct nfs4_exception exception = { };
3923 int err;
3924 do {
3925 err = nfs4_handle_exception(NFS_SERVER(inode),
3926 __nfs4_proc_set_acl(inode, buf, buflen),
3927 &exception);
3928 } while (exception.retry);
3929 return err;
3930}
3931
1da177e4 3932static int
aa5190d0 3933nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3934{
aa5190d0
TM		 3935 struct nfs_client *clp = server->nfs_client;
3936
3937 if (task->tk_status >= 0)
1da177e4
LT		 3938 return 0;
3939 switch(task->tk_status) {
a1d0b5ee 3940 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3941 case -NFS4ERR_ADMIN_REVOKED:
3942 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3943 if (state == NULL)
3944 break;
3945 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3946 case -NFS4ERR_OPENMODE:
3947 if (state == NULL)
3948 break;
0400a6b0
TM		 3949 nfs4_schedule_stateid_recovery(server, state);
3950 goto wait_on_recovery;
0ced63d1
TM		 3951 case -NFS4ERR_EXPIRED:
3952 if (state != NULL)
3953 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3954 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3955 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3956 nfs4_schedule_lease_recovery(clp);
3957 goto wait_on_recovery;
4745e315
AA		 3958#if defined(CONFIG_NFS_V4_1)
3959 case -NFS4ERR_BADSESSION:
3960 case -NFS4ERR_BADSLOT:
3961 case -NFS4ERR_BAD_HIGH_SLOT:
3962 case -NFS4ERR_DEADSESSION:
3963 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3964 case -NFS4ERR_SEQ_FALSE_RETRY:
3965 case -NFS4ERR_SEQ_MISORDERED:
3966 dprintk("%s ERROR %d, Reset session\n", __func__,
3967 task->tk_status);
9f594791 3968 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3969 task->tk_status = 0;
3970 return -EAGAIN;
3971#endif /* CONFIG_NFS_V4_1 */
1da177e4 3972 case -NFS4ERR_DELAY:
aa5190d0 3973 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3974 case -NFS4ERR_GRACE:
2c643488 3975 case -EKEYEXPIRED:
1da177e4
LT		 3976 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3977 task->tk_status = 0;
3978 return -EAGAIN;
a8a4ae3a 3979 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3980 case -NFS4ERR_OLD_STATEID:
3981 task->tk_status = 0;
3982 return -EAGAIN;
3983 }
3984 task->tk_status = nfs4_map_errors(task->tk_status);
3985 return 0;
0400a6b0 3986wait_on_recovery:
a2c0b9e2 3987 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3988 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3989 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3990 task->tk_status = 0;
3991 return -EAGAIN;
1da177e4
LT		 3992}
3993
f092075d
CL		 3994static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3995 nfs4_verifier *bootverf)
cd93710e
CL		 3996{
3997 __be32 verf[2];
3998
2c820d9a
CL		 3999 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4000 /* An impossible timestamp guarantees this value
4001 * will never match a generated boot time. */
4002 verf[0] = 0;
4003 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4004 } else {
f092075d
CL		 4005 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4006 verf[0] = (__be32)nn->boot_time.tv_sec;
4007 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4008 }
cd93710e
CL		 4009 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4010}
4011
6bbb4ae8
CL		 4012/**
4013 * nfs4_proc_setclientid - Negotiate client ID
4014 * @clp: state data structure
4015 * @program: RPC program for NFSv4 callback service
4016 * @port: IP port number for NFS4 callback service
4017 * @cred: RPC credential to use for this call
4018 * @res: where to place the result
4019 *
4020 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4021 */
bb8b27e5
TM		 4022int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4023 unsigned short port, struct rpc_cred *cred,
4024 struct nfs4_setclientid_res *res)
1da177e4
LT		 4025{
4026 nfs4_verifier sc_verifier;
4027 struct nfs4_setclientid setclientid = {
4028 .sc_verifier = &sc_verifier,
4029 .sc_prog = program,
f4eecd5d 4030 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4031 };
4032 struct rpc_message msg = {
4033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4034 .rpc_argp = &setclientid,
bb8b27e5 4035 .rpc_resp = res,
286d7d6a 4036 .rpc_cred = cred,
1da177e4 4037 };
6bbb4ae8 4038 int status;
1da177e4 4039
de734831 4040 /* nfs_client_id4 */
f092075d 4041 nfs4_init_boot_verifier(clp, &sc_verifier);
de734831
CL		 4042 rcu_read_lock();
4043 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4044 sizeof(setclientid.sc_name), "%s/%s %s",
4045 clp->cl_ipaddr,
4046 rpc_peeraddr2str(clp->cl_rpcclient,
4047 RPC_DISPLAY_ADDR),
4048 rpc_peeraddr2str(clp->cl_rpcclient,
4049 RPC_DISPLAY_PROTO));
4050 /* cb_client4 */
4051 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4052 sizeof(setclientid.sc_netid),
4053 rpc_peeraddr2str(clp->cl_rpcclient,
4054 RPC_DISPLAY_NETID));
de734831
CL		 4055 rcu_read_unlock();
4056 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4057 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4058 clp->cl_ipaddr, port >> 8, port & 255);
4059
6bbb4ae8
CL		 4060 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4061 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4062 setclientid.sc_name_len, setclientid.sc_name);
4063 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4064 dprintk("NFS reply setclientid: %d\n", status);
4065 return status;
1da177e4
LT		 4066}
4067
6bbb4ae8
CL		 4068/**
4069 * nfs4_proc_setclientid_confirm - Confirm client ID
4070 * @clp: state data structure
4071 * @res: result of a previous SETCLIENTID
4072 * @cred: RPC credential to use for this call
4073 *
4074 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4075 */
fd954ae1 4076int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4077 struct nfs4_setclientid_res *arg,
4078 struct rpc_cred *cred)
1da177e4
LT		 4079{
4080 struct nfs_fsinfo fsinfo;
4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4083 .rpc_argp = arg,
1da177e4 4084 .rpc_resp = &fsinfo,
286d7d6a 4085 .rpc_cred = cred,
1da177e4
LT		 4086 };
4087 unsigned long now;
4088 int status;
4089
6bbb4ae8
CL		 4090 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4091 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4092 clp->cl_clientid);
1da177e4 4093 now = jiffies;
1bd714f2 4094 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4095 if (status == 0) {
4096 spin_lock(&clp->cl_lock);
4097 clp->cl_lease_time = fsinfo.lease_time * HZ;
4098 clp->cl_last_renewal = now;
4099 spin_unlock(&clp->cl_lock);
4100 }
6bbb4ae8 4101 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4102 return status;
4103}
4104
fe650407
TM		 4105struct nfs4_delegreturndata {
4106 struct nfs4_delegreturnargs args;
fa178f29 4107 struct nfs4_delegreturnres res;
fe650407
TM		 4108 struct nfs_fh fh;
4109 nfs4_stateid stateid;
26e976a8 4110 unsigned long timestamp;
fa178f29 4111 struct nfs_fattr fattr;
fe650407
TM		 4112 int rpc_status;
4113};
4114
fe650407
TM		 4115static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4116{
4117 struct nfs4_delegreturndata *data = calldata;
938e1010 4118
14516c3a
TM		 4119 if (!nfs4_sequence_done(task, &data->res.seq_res))
4120 return;
938e1010 4121
79708861
RL		 4122 switch (task->tk_status) {
4123 case -NFS4ERR_STALE_STATEID:
4124 case -NFS4ERR_EXPIRED:
4125 case 0:
fa178f29 4126 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4127 break;
4128 default:
4129 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4130 -EAGAIN) {
d00c5d43 4131 rpc_restart_call_prepare(task);
79708861
RL		 4132 return;
4133 }
4134 }
4135 data->rpc_status = task->tk_status;
fe650407
TM		 4136}
4137
4138static void nfs4_delegreturn_release(void *calldata)
4139{
fe650407
TM		 4140 kfree(calldata);
4141}
4142
938e1010
AA		 4143#if defined(CONFIG_NFS_V4_1)
4144static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4145{
4146 struct nfs4_delegreturndata *d_data;
4147
4148 d_data = (struct nfs4_delegreturndata *)data;
4149
035168ab 4150 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4151 &d_data->args.seq_args,
9d12b216 4152 &d_data->res.seq_res, task))
938e1010
AA		 4153 return;
4154 rpc_call_start(task);
4155}
4156#endif /* CONFIG_NFS_V4_1 */
4157
c8d149f3 4158static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4159#if defined(CONFIG_NFS_V4_1)
4160 .rpc_call_prepare = nfs4_delegreturn_prepare,
4161#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4162 .rpc_call_done = nfs4_delegreturn_done,
4163 .rpc_release = nfs4_delegreturn_release,
4164};
4165
e6f81075 4166static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4167{
4168 struct nfs4_delegreturndata *data;
fa178f29 4169 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4170 struct rpc_task *task;
5138fde0
TM		 4171 struct rpc_message msg = {
4172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4173 .rpc_cred = cred,
4174 };
c970aa85
TM		 4175 struct rpc_task_setup task_setup_data = {
4176 .rpc_client = server->client,
5138fde0 4177 .rpc_message = &msg,
c970aa85
TM		 4178 .callback_ops = &nfs4_delegreturn_ops,
4179 .flags = RPC_TASK_ASYNC,
4180 };
e6f81075 4181 int status = 0;
fe650407 4182
8535b2be 4183 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4184 if (data == NULL)
4185 return -ENOMEM;
9d12b216 4186 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4187 data->args.fhandle = &data->fh;
4188 data->args.stateid = &data->stateid;
9e907fec 4189 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4190 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4191 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4192 data->res.fattr = &data->fattr;
4193 data->res.server = server;
5138fde0 4194 nfs_fattr_init(data->res.fattr);
26e976a8 4195 data->timestamp = jiffies;
fe650407
TM		 4196 data->rpc_status = 0;
4197
c970aa85 4198 task_setup_data.callback_data = data;
1174dd1f
TM		 4199 msg.rpc_argp = &data->args;
4200 msg.rpc_resp = &data->res;
c970aa85 4201 task = rpc_run_task(&task_setup_data);
7a1218a2 4202 if (IS_ERR(task))
fe650407 4203 return PTR_ERR(task);
e6f81075
TM		 4204 if (!issync)
4205 goto out;
fe650407 4206 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4207 if (status != 0)
4208 goto out;
4209 status = data->rpc_status;
e144cbcc
TM		 4210 if (status == 0)
4211 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4212 else
4213 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4214out:
e6b3c4db 4215 rpc_put_task(task);
fe650407 4216 return status;
1da177e4
LT		 4217}
4218
e6f81075 4219int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4220{
4221 struct nfs_server *server = NFS_SERVER(inode);
4222 struct nfs4_exception exception = { };
4223 int err;
4224 do {
e6f81075 4225 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4226 switch (err) {
4227 case -NFS4ERR_STALE_STATEID:
4228 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4229 case 0:
4230 return 0;
4231 }
4232 err = nfs4_handle_exception(server, err, &exception);
4233 } while (exception.retry);
4234 return err;
4235}
4236
4237#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4238#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4239
4240/*
4241 * sleep, with exponential backoff, and retry the LOCK operation.
4242 */
4243static unsigned long
4244nfs4_set_lock_task_retry(unsigned long timeout)
4245{
d310310c 4246 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4247 timeout <<= 1;
4248 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4249 return NFS4_LOCK_MAXTIMEOUT;
4250 return timeout;
4251}
4252
1da177e4
LT		 4253static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4254{
4255 struct inode *inode = state->inode;
4256 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4257 struct nfs_client *clp = server->nfs_client;
911d1aaf 4258 struct nfs_lockt_args arg = {
1da177e4 4259 .fh = NFS_FH(inode),
911d1aaf 4260 .fl = request,
1da177e4 4261 };
911d1aaf
TM		 4262 struct nfs_lockt_res res = {
4263 .denied = request,
1da177e4
LT		 4264 };
4265 struct rpc_message msg = {
4266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4267 .rpc_argp = &arg,
4268 .rpc_resp = &res,
4269 .rpc_cred = state->owner->so_cred,
4270 };
1da177e4
LT		 4271 struct nfs4_lock_state *lsp;
4272 int status;
4273
911d1aaf 4274 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4275 status = nfs4_set_lock_state(state, request);
4276 if (status != 0)
4277 goto out;
4278 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4279 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4280 arg.lock_owner.s_dev = server->s_dev;
7c513058 4281 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4282 switch (status) {
4283 case 0:
4284 request->fl_type = F_UNLCK;
4285 break;
4286 case -NFS4ERR_DENIED:
4287 status = 0;
1da177e4 4288 }
70cc6487 4289 request->fl_ops->fl_release_private(request);
8d0a8a9d 4290out:
1da177e4
LT		 4291 return status;
4292}
4293
4294static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4295{
4296 struct nfs4_exception exception = { };
4297 int err;
4298
4299 do {
4300 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4301 _nfs4_proc_getlk(state, cmd, request),
4302 &exception);
4303 } while (exception.retry);
4304 return err;
4305}
4306
4307static int do_vfs_lock(struct file *file, struct file_lock *fl)
4308{
4309 int res = 0;
4310 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4311 case FL_POSIX:
4312 res = posix_lock_file_wait(file, fl);
4313 break;
4314 case FL_FLOCK:
4315 res = flock_lock_file_wait(file, fl);
4316 break;
4317 default:
4318 BUG();
4319 }
1da177e4
LT		 4320 return res;
4321}
4322
faf5f49c 4323struct nfs4_unlockdata {
911d1aaf
TM		 4324 struct nfs_locku_args arg;
4325 struct nfs_locku_res res;
faf5f49c
TM		 4326 struct nfs4_lock_state *lsp;
4327 struct nfs_open_context *ctx;
911d1aaf
TM		 4328 struct file_lock fl;
4329 const struct nfs_server *server;
26e976a8 4330 unsigned long timestamp;
faf5f49c
TM		 4331};
4332
911d1aaf
TM		 4333static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4334 struct nfs_open_context *ctx,
4335 struct nfs4_lock_state *lsp,
4336 struct nfs_seqid *seqid)
4337{
4338 struct nfs4_unlockdata *p;
4339 struct inode *inode = lsp->ls_state->inode;
4340
8535b2be 4341 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4342 if (p == NULL)
4343 return NULL;
4344 p->arg.fh = NFS_FH(inode);
4345 p->arg.fl = &p->fl;
4346 p->arg.seqid = seqid;
c1d51931 4347 p->res.seqid = seqid;
911d1aaf
TM		 4348 p->arg.stateid = &lsp->ls_stateid;
4349 p->lsp = lsp;
4350 atomic_inc(&lsp->ls_count);
4351 /* Ensure we don't close file until we're done freeing locks! */
4352 p->ctx = get_nfs_open_context(ctx);
4353 memcpy(&p->fl, fl, sizeof(p->fl));
4354 p->server = NFS_SERVER(inode);
4355 return p;
4356}
4357
06f814a3 4358static void nfs4_locku_release_calldata(void *data)
faf5f49c 4359{
963d8fe5 4360 struct nfs4_unlockdata *calldata = data;
911d1aaf 4361 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4362 nfs4_put_lock_state(calldata->lsp);
4363 put_nfs_open_context(calldata->ctx);
4364 kfree(calldata);
faf5f49c
TM		 4365}
4366
963d8fe5 4367static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4368{
963d8fe5 4369 struct nfs4_unlockdata *calldata = data;
faf5f49c 4370
14516c3a
TM		 4371 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4372 return;
faf5f49c
TM		 4373 switch (task->tk_status) {
4374 case 0:
f597c537
TM		 4375 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4376 &calldata->res.stateid);
26e976a8 4377 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4378 break;
9e33bed5
TM		 4379 case -NFS4ERR_BAD_STATEID:
4380 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4381 case -NFS4ERR_STALE_STATEID:
4382 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4383 break;
4384 default:
9e33bed5 4385 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4386 rpc_restart_call_prepare(task);
faf5f49c 4387 }
faf5f49c
TM		 4388}
4389
4ce70ada 4390static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4391{
4ce70ada 4392 struct nfs4_unlockdata *calldata = data;
faf5f49c 4393
911d1aaf 4394 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4395 return;
795a88c9 4396 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4397 /* Note: exit _without_ running nfs4_locku_done */
4398 task->tk_action = NULL;
faf5f49c
TM		 4399 return;
4400 }
26e976a8 4401 calldata->timestamp = jiffies;
035168ab 4402 if (nfs4_setup_sequence(calldata->server,
a893693c 4403 &calldata->arg.seq_args,
9d12b216 4404 &calldata->res.seq_res, task))
a893693c 4405 return;
5138fde0 4406 rpc_call_start(task);
faf5f49c
TM		 4407}
4408
963d8fe5 4409static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4410 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4411 .rpc_call_done = nfs4_locku_done,
06f814a3 4412 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4413};
4414
a5d16a4d
TM		 4415static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4416 struct nfs_open_context *ctx,
4417 struct nfs4_lock_state *lsp,
4418 struct nfs_seqid *seqid)
4419{
4420 struct nfs4_unlockdata *data;
5138fde0
TM		 4421 struct rpc_message msg = {
4422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4423 .rpc_cred = ctx->cred,
4424 };
c970aa85
TM		 4425 struct rpc_task_setup task_setup_data = {
4426 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4427 .rpc_message = &msg,
c970aa85 4428 .callback_ops = &nfs4_locku_ops,
101070ca 4429 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4430 .flags = RPC_TASK_ASYNC,
4431 };
a5d16a4d 4432
137d6aca
FF		 4433 /* Ensure this is an unlock - when canceling a lock, the
4434 * canceled lock is passed in, and it won't be an unlock.
4435 */
4436 fl->fl_type = F_UNLCK;
4437
a5d16a4d
TM		 4438 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4439 if (data == NULL) {
4440 nfs_free_seqid(seqid);
4441 return ERR_PTR(-ENOMEM);
4442 }
4443
9d12b216 4444 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4445 msg.rpc_argp = &data->arg;
4446 msg.rpc_resp = &data->res;
c970aa85
TM		 4447 task_setup_data.callback_data = data;
4448 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4449}
4450
faf5f49c
TM		 4451static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4452{
19e03c57 4453 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4454 struct nfs_seqid *seqid;
1da177e4 4455 struct nfs4_lock_state *lsp;
06f814a3
TM		 4456 struct rpc_task *task;
4457 int status = 0;
536ff0f8 4458 unsigned char fl_flags = request->fl_flags;
faf5f49c 4459
8d0a8a9d 4460 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4461 /* Unlock _before_ we do the RPC call */
4462 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4463 down_read(&nfsi->rwsem);
4464 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4465 up_read(&nfsi->rwsem);
9b073574 4466 goto out;
19e03c57
TM		 4467 }
4468 up_read(&nfsi->rwsem);
8d0a8a9d 4469 if (status != 0)
9b073574
TM		 4470 goto out;
4471 /* Is this a delegated lock? */
4472 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4473 goto out;
8d0a8a9d 4474 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4475 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4476 status = -ENOMEM;
911d1aaf 4477 if (seqid == NULL)
9b073574 4478 goto out;
cd3758e3 4479 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4480 status = PTR_ERR(task);
4481 if (IS_ERR(task))
9b073574 4482 goto out;
a5d16a4d 4483 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4484 rpc_put_task(task);
9b073574 4485out:
536ff0f8 4486 request->fl_flags = fl_flags;
1da177e4
LT		 4487 return status;
4488}
4489
a5d16a4d
TM		 4490struct nfs4_lockdata {
4491 struct nfs_lock_args arg;
4492 struct nfs_lock_res res;
4493 struct nfs4_lock_state *lsp;
4494 struct nfs_open_context *ctx;
4495 struct file_lock fl;
26e976a8 4496 unsigned long timestamp;
a5d16a4d
TM		 4497 int rpc_status;
4498 int cancelled;
66179efe 4499 struct nfs_server *server;
a5d16a4d
TM		 4500};
4501
4502static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4503 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4504 gfp_t gfp_mask)
1da177e4 4505{
a5d16a4d
TM		 4506 struct nfs4_lockdata *p;
4507 struct inode *inode = lsp->ls_state->inode;
1da177e4 4508 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4509
8535b2be 4510 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4511 if (p == NULL)
4512 return NULL;
4513
4514 p->arg.fh = NFS_FH(inode);
4515 p->arg.fl = &p->fl;
8535b2be 4516 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4517 if (p->arg.open_seqid == NULL)
4518 goto out_free;
8535b2be 4519 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4520 if (p->arg.lock_seqid == NULL)
2f74c0a0 4521 goto out_free_seqid;
a5d16a4d 4522 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4523 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4524 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4525 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4526 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4527 p->lsp = lsp;
66179efe 4528 p->server = server;
a5d16a4d
TM		 4529 atomic_inc(&lsp->ls_count);
4530 p->ctx = get_nfs_open_context(ctx);
4531 memcpy(&p->fl, fl, sizeof(p->fl));
4532 return p;
2f74c0a0
TM		 4533out_free_seqid:
4534 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4535out_free:
4536 kfree(p);
4537 return NULL;
4538}
4539
4540static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4541{
4542 struct nfs4_lockdata *data = calldata;
4543 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4544
3110ff80 4545 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4546 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4547 return;
a5d16a4d
TM		 4548 /* Do we need to do an open_to_lock_owner? */
4549 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4550 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4551 return;
a5d16a4d
TM		 4552 data->arg.open_stateid = &state->stateid;
4553 data->arg.new_lock_owner = 1;
c1d51931 4554 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4555 } else
4556 data->arg.new_lock_owner = 0;
26e976a8 4557 data->timestamp = jiffies;
035168ab
TM		 4558 if (nfs4_setup_sequence(data->server,
4559 &data->arg.seq_args,
9d12b216 4560 &data->res.seq_res, task))
66179efe 4561 return;
5138fde0 4562 rpc_call_start(task);
3110ff80 4563 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4564}
4565
b257957e
AB		 4566static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4567{
4568 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4569 nfs4_lock_prepare(task, calldata);
4570}
4571
a5d16a4d
TM		 4572static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4573{
4574 struct nfs4_lockdata *data = calldata;
4575
3110ff80 4576 dprintk("%s: begin!\n", __func__);
a5d16a4d 4577
14516c3a
TM		 4578 if (!nfs4_sequence_done(task, &data->res.seq_res))
4579 return;
66179efe 4580
a5d16a4d 4581 data->rpc_status = task->tk_status;
a5d16a4d 4582 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4583 if (data->rpc_status == 0)
4584 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4585 else
4586 goto out;
4587 }
4588 if (data->rpc_status == 0) {
f597c537 4589 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4590 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4591 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4592 }
a5d16a4d 4593out:
3110ff80 4594 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4595}
4596
4597static void nfs4_lock_release(void *calldata)
4598{
4599 struct nfs4_lockdata *data = calldata;
4600
3110ff80 4601 dprintk("%s: begin!\n", __func__);
2f74c0a0 4602 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4603 if (data->cancelled != 0) {
4604 struct rpc_task *task;
4605 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4606 data->arg.lock_seqid);
4607 if (!IS_ERR(task))
bf294b41 4608 rpc_put_task_async(task);
3110ff80 4609 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4610 } else
4611 nfs_free_seqid(data->arg.lock_seqid);
4612 nfs4_put_lock_state(data->lsp);
4613 put_nfs_open_context(data->ctx);
4614 kfree(data);
3110ff80 4615 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4616}
4617
4618static const struct rpc_call_ops nfs4_lock_ops = {
4619 .rpc_call_prepare = nfs4_lock_prepare,
4620 .rpc_call_done = nfs4_lock_done,
4621 .rpc_release = nfs4_lock_release,
4622};
4623
b257957e
AB		 4624static const struct rpc_call_ops nfs4_recover_lock_ops = {
4625 .rpc_call_prepare = nfs4_recover_lock_prepare,
4626 .rpc_call_done = nfs4_lock_done,
4627 .rpc_release = nfs4_lock_release,
4628};
4629
2bee72a6
TM		 4630static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4631{
2bee72a6
TM		 4632 switch (error) {
4633 case -NFS4ERR_ADMIN_REVOKED:
4634 case -NFS4ERR_BAD_STATEID:
ecac799a 4635 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4636 if (new_lock_owner != 0 ||
795a88c9 4637 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4638 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4639 break;
4640 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4641 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4642 case -NFS4ERR_EXPIRED:
4643 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4644 };
4645}
4646
afe6c27c 4647static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4648{
4649 struct nfs4_lockdata *data;
4650 struct rpc_task *task;
5138fde0
TM		 4651 struct rpc_message msg = {
4652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4653 .rpc_cred = state->owner->so_cred,
4654 };
c970aa85
TM		 4655 struct rpc_task_setup task_setup_data = {
4656 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4657 .rpc_message = &msg,
c970aa85 4658 .callback_ops = &nfs4_lock_ops,
101070ca 4659 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4660 .flags = RPC_TASK_ASYNC,
4661 };
a5d16a4d
TM		 4662 int ret;
4663
3110ff80 4664 dprintk("%s: begin!\n", __func__);
cd3758e3 4665 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4666 fl->fl_u.nfs4_fl.owner,
4667 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4668 if (data == NULL)
4669 return -ENOMEM;
4670 if (IS_SETLKW(cmd))
4671 data->arg.block = 1;
b257957e
AB		 4672 if (recovery_type > NFS_LOCK_NEW) {
4673 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4674 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4675 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4676 }
9d12b216 4677 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4678 msg.rpc_argp = &data->arg;
4679 msg.rpc_resp = &data->res;
c970aa85
TM		 4680 task_setup_data.callback_data = data;
4681 task = rpc_run_task(&task_setup_data);
7a1218a2 4682 if (IS_ERR(task))
a5d16a4d 4683 return PTR_ERR(task);
a5d16a4d
TM		 4684 ret = nfs4_wait_for_completion_rpc_task(task);
4685 if (ret == 0) {
4686 ret = data->rpc_status;
2bee72a6
TM		 4687 if (ret)
4688 nfs4_handle_setlk_error(data->server, data->lsp,
4689 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4690 } else
4691 data->cancelled = 1;
e6b3c4db 4692 rpc_put_task(task);
3110ff80 4693 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4694 return ret;
1da177e4
LT		 4695}
4696
4697static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4698{
202b50dc 4699 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4700 struct nfs4_exception exception = {
4701 .inode = state->inode,
4702 };
202b50dc
TM		 4703 int err;
4704
4705 do {
42a2d13e
TM		 4706 /* Cache the lock if possible... */
4707 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4708 return 0;
afe6c27c 4709 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4710 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4711 break;
4712 nfs4_handle_exception(server, err, &exception);
4713 } while (exception.retry);
4714 return err;
1da177e4
LT		 4715}
4716
4717static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4718{
202b50dc 4719 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4720 struct nfs4_exception exception = {
4721 .inode = state->inode,
4722 };
202b50dc
TM		 4723 int err;
4724
6bfc93ef
TM		 4725 err = nfs4_set_lock_state(state, request);
4726 if (err != 0)
4727 return err;
202b50dc 4728 do {
42a2d13e
TM		 4729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4730 return 0;
afe6c27c 4731 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4732 switch (err) {
4733 default:
4734 goto out;
4735 case -NFS4ERR_GRACE:
4736 case -NFS4ERR_DELAY:
4737 nfs4_handle_exception(server, err, &exception);
4738 err = 0;
4739 }
202b50dc 4740 } while (exception.retry);
a9ed2e25 4741out:
202b50dc 4742 return err;
1da177e4
LT		 4743}
4744
f062eb6c 4745#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4746/**
4747 * nfs41_check_expired_locks - possibly free a lock stateid
4748 *
4749 * @state: NFSv4 state for an inode
4750 *
4751 * Returns NFS_OK if recovery for this stateid is now finished.
4752 * Otherwise a negative NFS4ERR value is returned.
4753 */
b01dd1d8 4754static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4755{
eb64cf96 4756 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4757 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4758 struct nfs_server *server = NFS_SERVER(state->inode);
4759
b01dd1d8 4760 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4761 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4762 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4763 if (status != NFS_OK) {
3e60ffdd
CL		 4764 /* Free the stateid unless the server
4765 * informs us the stateid is unrecognized. */
89af2739
CL		 4766 if (status != -NFS4ERR_BAD_STATEID)
4767 nfs41_free_stateid(server,
4768 &lsp->ls_stateid);
795a88c9 4769 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4770 ret = status;
4771 }
4772 }
4773 };
4774
4775 return ret;
4776}
4777
4778static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4779{
4780 int status = NFS_OK;
4781
4782 if (test_bit(LK_STATE_IN_USE, &state->flags))
4783 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4784 if (status != NFS_OK)
4785 status = nfs4_lock_expired(state, request);
4786 return status;
f062eb6c
BS		 4787}
4788#endif
4789
1da177e4
LT		 4790static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4791{
19e03c57 4792 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4793 unsigned char fl_flags = request->fl_flags;
8e469ebd 4794 int status = -ENOLCK;
1da177e4 4795
8e469ebd
TM		 4796 if ((fl_flags & FL_POSIX) &&
4797 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4798 goto out;
6bfc93ef 4799 /* Is this a delegated open? */
6bfc93ef
TM		 4800 status = nfs4_set_lock_state(state, request);
4801 if (status != 0)
4802 goto out;
01c3b861
TM		 4803 request->fl_flags |= FL_ACCESS;
4804 status = do_vfs_lock(request->fl_file, request);
4805 if (status < 0)
4806 goto out;
19e03c57 4807 down_read(&nfsi->rwsem);
01c3b861 4808 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4809 /* Yes: cache locks! */
01c3b861 4810 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4811 request->fl_flags = fl_flags & ~FL_SLEEP;
4812 status = do_vfs_lock(request->fl_file, request);
4813 goto out_unlock;
01c3b861 4814 }
afe6c27c 4815 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4816 if (status != 0)
01c3b861 4817 goto out_unlock;
6bfc93ef 4818 /* Note: we always want to sleep here! */
01c3b861 4819 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4820 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4821 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4822 "manager!\n", __func__);
01c3b861 4823out_unlock:
19e03c57 4824 up_read(&nfsi->rwsem);
01c3b861
TM		 4825out:
4826 request->fl_flags = fl_flags;
1da177e4
LT		 4827 return status;
4828}
4829
4830static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4831{
a1d0b5ee
TM		 4832 struct nfs4_exception exception = {
4833 .state = state,
05ffe24f 4834 .inode = state->inode,
a1d0b5ee 4835 };
1da177e4
LT		 4836 int err;
4837
4838 do {
965b5d67
TM		 4839 err = _nfs4_proc_setlk(state, cmd, request);
4840 if (err == -NFS4ERR_DENIED)
4841 err = -EAGAIN;
1da177e4 4842 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4843 err, &exception);
1da177e4
LT		 4844 } while (exception.retry);
4845 return err;
4846}
4847
4848static int
4849nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4850{
4851 struct nfs_open_context *ctx;
4852 struct nfs4_state *state;
4853 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4854 int status;
4855
4856 /* verify open state */
cd3758e3 4857 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4858 state = ctx->state;
4859
4860 if (request->fl_start < 0 || request->fl_end < 0)
4861 return -EINVAL;
4862
d953126a
TM		 4863 if (IS_GETLK(cmd)) {
4864 if (state != NULL)
4865 return nfs4_proc_getlk(state, F_GETLK, request);
4866 return 0;
4867 }
1da177e4
LT		 4868
4869 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4870 return -EINVAL;
4871
d953126a
TM		 4872 if (request->fl_type == F_UNLCK) {
4873 if (state != NULL)
4874 return nfs4_proc_unlck(state, cmd, request);
4875 return 0;
4876 }
1da177e4 4877
d953126a
TM		 4878 if (state == NULL)
4879 return -ENOLCK;
55725513
TM		 4880 /*
4881 * Don't rely on the VFS having checked the file open mode,
4882 * since it won't do this for flock() locks.
4883 */
f44106e2 4884 switch (request->fl_type) {
55725513
TM		 4885 case F_RDLCK:
4886 if (!(filp->f_mode & FMODE_READ))
4887 return -EBADF;
4888 break;
4889 case F_WRLCK:
4890 if (!(filp->f_mode & FMODE_WRITE))
4891 return -EBADF;
4892 }
4893
1da177e4
LT		 4894 do {
4895 status = nfs4_proc_setlk(state, cmd, request);
4896 if ((status != -EAGAIN) || IS_SETLK(cmd))
4897 break;
4898 timeout = nfs4_set_lock_task_retry(timeout);
4899 status = -ERESTARTSYS;
4900 if (signalled())
4901 break;
4902 } while(status < 0);
1da177e4
LT		 4903 return status;
4904}
4905
888e694c
TM		 4906int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4907{
4908 struct nfs_server *server = NFS_SERVER(state->inode);
4909 struct nfs4_exception exception = { };
4910 int err;
4911
4912 err = nfs4_set_lock_state(state, fl);
4913 if (err != 0)
4914 goto out;
4915 do {
afe6c27c 4916 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4917 switch (err) {
4918 default:
a030889a
WAA		 4919 printk(KERN_ERR "NFS: %s: unhandled error "
4920 "%d.\n", __func__, err);
d5122201 4921 case 0:
965b5d67 4922 case -ESTALE:
d5122201
TM		 4923 goto out;
4924 case -NFS4ERR_EXPIRED:
0ced63d1 4925 nfs4_schedule_stateid_recovery(server, state);
d5122201 4926 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4927 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4928 nfs4_schedule_lease_recovery(server->nfs_client);
4929 goto out;
74e7bb73
RL		 4930 case -NFS4ERR_BADSESSION:
4931 case -NFS4ERR_BADSLOT:
4932 case -NFS4ERR_BAD_HIGH_SLOT:
4933 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4934 case -NFS4ERR_DEADSESSION:
9f594791 4935 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4936 goto out;
965b5d67
TM		 4937 case -ERESTARTSYS:
4938 /*
4939 * The show must go on: exit, but mark the
4940 * stateid as needing recovery.
4941 */
a1d0b5ee 4942 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4943 case -NFS4ERR_ADMIN_REVOKED:
4944 case -NFS4ERR_BAD_STATEID:
4945 case -NFS4ERR_OPENMODE:
0400a6b0 4946 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4947 err = 0;
4948 goto out;
168667c4
TM		 4949 case -EKEYEXPIRED:
4950 /*
4951 * User RPCSEC_GSS context has expired.
4952 * We cannot recover this stateid now, so
4953 * skip it and allow recovery thread to
4954 * proceed.
4955 */
4956 err = 0;
4957 goto out;
965b5d67
TM		 4958 case -ENOMEM:
4959 case -NFS4ERR_DENIED:
4960 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4961 err = 0;
4962 goto out;
d5122201
TM		 4963 case -NFS4ERR_DELAY:
4964 break;
4965 }
888e694c
TM		 4966 err = nfs4_handle_exception(server, err, &exception);
4967 } while (exception.retry);
4968out:
4969 return err;
4970}
6b3b5496 4971
cf470c3e
TM		 4972struct nfs_release_lockowner_data {
4973 struct nfs4_lock_state *lsp;
5ae67c4f 4974 struct nfs_server *server;
cf470c3e
TM		 4975 struct nfs_release_lockowner_args args;
4976};
4977
d3c7b7cc
TM		 4978static void nfs4_release_lockowner_release(void *calldata)
4979{
cf470c3e 4980 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4981 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4982 kfree(calldata);
4983}
4984
17280175 4985static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4986 .rpc_release = nfs4_release_lockowner_release,
4987};
4988
cf470c3e 4989int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4990{
4991 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4992 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4993 struct rpc_message msg = {
4994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4995 };
4996
4997 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 4998 return -EINVAL;
4999 data = kmalloc(sizeof(*data), GFP_NOFS);
5000 if (!data)
5001 return -ENOMEM;
5002 data->lsp = lsp;
5ae67c4f 5003 data->server = server;
cf470c3e
TM		 5004 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5005 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5006 data->args.lock_owner.s_dev = server->s_dev;
5007 msg.rpc_argp = &data->args;
5008 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5009 return 0;
d3c7b7cc
TM		 5010}
5011
aa1870af
BF		 5012#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5013
64c2ce8b
AK		 5014static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5015 const void *buf, size_t buflen,
5016 int flags, int type)
6b3b5496 5017{
64c2ce8b
AK		 5018 if (strcmp(key, "") != 0)
5019 return -EINVAL;
4b580ee3 5020
64c2ce8b 5021 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5022}
5023
64c2ce8b
AK		 5024static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5025 void *buf, size_t buflen, int type)
6b3b5496 5026{
64c2ce8b
AK		 5027 if (strcmp(key, "") != 0)
5028 return -EINVAL;
aa1870af 5029
64c2ce8b 5030 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5031}
5032
64c2ce8b
AK		 5033static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5034 size_t list_len, const char *name,
5035 size_t name_len, int type)
6b3b5496 5036{
64c2ce8b 5037 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5038
096455a2
BF		 5039 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5040 return 0;
64c2ce8b
AK		 5041
5042 if (list && len <= list_len)
5043 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5044 return len;
6b3b5496
BF		 5045}
5046
533eb461
AA		 5047/*
5048 * nfs_fhget will use either the mounted_on_fileid or the fileid
5049 */
69aaaae1
TM		 5050static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5051{
533eb461
AA		 5052 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5053 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5054 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5055 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5056 return;
5057
5058 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5059 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5060 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5061 fattr->nlink = 2;
5062}
5063
f05d147f
BS		 5064static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5065 const struct qstr *name,
5066 struct nfs4_fs_locations *fs_locations,
5067 struct page *page)
683b57b4
TM		 5068{
5069 struct nfs_server *server = NFS_SERVER(dir);
5070 u32 bitmask[2] = {
361e624f 5071 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5072 };
5073 struct nfs4_fs_locations_arg args = {
5074 .dir_fh = NFS_FH(dir),
c228fd3a 5075 .name = name,
683b57b4
TM		 5076 .page = page,
5077 .bitmask = bitmask,
5078 };
22958463
BH		 5079 struct nfs4_fs_locations_res res = {
5080 .fs_locations = fs_locations,
5081 };
683b57b4
TM		 5082 struct rpc_message msg = {
5083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5084 .rpc_argp = &args,
22958463 5085 .rpc_resp = &res,
683b57b4
TM		 5086 };
5087 int status;
5088
3110ff80 5089 dprintk("%s: start\n", __func__);
533eb461
AA		 5090
5091 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5092 * is not supported */
5093 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5094 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5095 else
5096 bitmask[0] |= FATTR4_WORD0_FILEID;
5097
c228fd3a 5098 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5099 fs_locations->server = server;
830b8e33 5100 fs_locations->nlocations = 0;
f05d147f 5101 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5102 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5103 return status;
5104}
5105
f05d147f
BS		 5106int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5107 const struct qstr *name,
5108 struct nfs4_fs_locations *fs_locations,
5109 struct page *page)
db0a9593
BS		 5110{
5111 struct nfs4_exception exception = { };
5112 int err;
5113 do {
5114 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5115 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5116 &exception);
5117 } while (exception.retry);
5118 return err;
5119}
5120
5a5ea0d4
BS		 5121static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5122{
5123 int status;
5124 struct nfs4_secinfo_arg args = {
5125 .dir_fh = NFS_FH(dir),
5126 .name = name,
5127 };
5128 struct nfs4_secinfo_res res = {
5129 .flavors = flavors,
5130 };
5131 struct rpc_message msg = {
5132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5133 .rpc_argp = &args,
5134 .rpc_resp = &res,
5135 };
5136
5137 dprintk("NFS call secinfo %s\n", name->name);
5138 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5139 dprintk("NFS reply secinfo: %d\n", status);
5140 return status;
5141}
5142
72de53ec
BS		 5143int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5144 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5145{
5146 struct nfs4_exception exception = { };
5147 int err;
5148 do {
5149 err = nfs4_handle_exception(NFS_SERVER(dir),
5150 _nfs4_proc_secinfo(dir, name, flavors),
5151 &exception);
5152 } while (exception.retry);
5153 return err;
5154}
5155
557134a3 5156#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5157/*
5158 * Check the exchange flags returned by the server for invalid flags, having
5159 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5160 * DS flags set.
5161 */
5162static int nfs4_check_cl_exchange_flags(u32 flags)
5163{
5164 if (flags & ~EXCHGID4_FLAG_MASK_R)
5165 goto out_inval;
5166 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5167 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5168 goto out_inval;
5169 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5170 goto out_inval;
5171 return NFS_OK;
5172out_inval:
5173 return -NFS4ERR_INVAL;
5174}
5175
78fe0f41 5176static bool
79d4e1f0
CL		 5177nfs41_same_server_scope(struct nfs41_server_scope *a,
5178 struct nfs41_server_scope *b)
78fe0f41
WAA		 5179{
5180 if (a->server_scope_sz == b->server_scope_sz &&
5181 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5182 return true;
5183
5184 return false;
5185}
5186
7c44f1ae
WAA		 5187/*
5188 * nfs4_proc_bind_conn_to_session()
5189 *
5190 * The 4.1 client currently uses the same TCP connection for the
5191 * fore and backchannel.
5192 */
2cf047c9 5193int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5194{
5195 int status;
5196 struct nfs41_bind_conn_to_session_res res;
5197 struct rpc_message msg = {
5198 .rpc_proc =
5199 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5200 .rpc_argp = clp,
5201 .rpc_resp = &res,
2cf047c9 5202 .rpc_cred = cred,
7c44f1ae
WAA		 5203 };
5204
5205 dprintk("--> %s\n", __func__);
5206 BUG_ON(clp == NULL);
5207
5208 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5209 if (unlikely(res.session == NULL)) {
5210 status = -ENOMEM;
5211 goto out;
5212 }
5213
5214 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5215 if (status == 0) {
5216 if (memcmp(res.session->sess_id.data,
5217 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5218 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5219 status = -EIO;
5220 goto out_session;
5221 }
5222 if (res.dir != NFS4_CDFS4_BOTH) {
5223 dprintk("NFS: %s: Unexpected direction from server\n",
5224 __func__);
5225 status = -EIO;
5226 goto out_session;
5227 }
5228 if (res.use_conn_in_rdma_mode) {
5229 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5230 __func__);
5231 status = -EIO;
5232 goto out_session;
5233 }
5234 }
5235out_session:
5236 kfree(res.session);
5237out:
5238 dprintk("<-- %s status= %d\n", __func__, status);
5239 return status;
5240}
5241
99fe60d0
BH		 5242/*
5243 * nfs4_proc_exchange_id()
5244 *
6bbb4ae8
CL		 5245 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5246 *
99fe60d0
BH		 5247 * Since the clientid has expired, all compounds using sessions
5248 * associated with the stale clientid will be returning
5249 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5250 * be in some phase of session reset.
5251 */
4d643d1d 5252int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5253{
5254 nfs4_verifier verifier;
5255 struct nfs41_exchange_id_args args = {
cd93710e 5256 .verifier = &verifier,
99fe60d0 5257 .client = clp,
357f54d6 5258 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5259 };
5260 struct nfs41_exchange_id_res res = {
32b01310 5261 0
99fe60d0
BH		 5262 };
5263 int status;
5264 struct rpc_message msg = {
5265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5266 .rpc_argp = &args,
5267 .rpc_resp = &res,
5268 .rpc_cred = cred,
5269 };
99fe60d0 5270
f092075d 5271 nfs4_init_boot_verifier(clp, &verifier);
c7a360b0 5272 args.id_len = scnprintf(args.id, sizeof(args.id),
de734831 5273 "%s/%s",
c7a360b0 5274 clp->cl_ipaddr,
de734831 5275 clp->cl_rpcclient->cl_nodename);
6bbb4ae8
CL		 5276 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5277 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5278 args.id_len, args.id);
99fe60d0 5279
acdeb69d 5280 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5281 GFP_NOFS);
acdeb69d 5282 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5283 status = -ENOMEM;
5284 goto out;
5285 }
78fe0f41 5286
79d4e1f0 5287 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5288 GFP_NOFS);
177313f1 5289 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5290 status = -ENOMEM;
acdeb69d 5291 goto out_server_owner;
abe9a6d5 5292 }
78fe0f41 5293
bbafffd2 5294 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5295 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5296 status = -ENOMEM;
5297 goto out_server_scope;
5298 }
5299
1bd714f2 5300 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5301 if (status == 0)
32b01310 5302 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5303
acdeb69d 5304 if (status == 0) {
32b01310
TM		 5305 clp->cl_clientid = res.clientid;
5306 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5307 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5308 clp->cl_seqid = res.seqid;
5309
acdeb69d
CL		 5310 kfree(clp->cl_serverowner);
5311 clp->cl_serverowner = res.server_owner;
5312 res.server_owner = NULL;
78fe0f41 5313
7d2ed9ac 5314 /* use the most recent implementation id */
59155546
CL		 5315 kfree(clp->cl_implid);
5316 clp->cl_implid = res.impl_id;
7d2ed9ac 5317
177313f1 5318 if (clp->cl_serverscope != NULL &&
79d4e1f0 5319 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5320 res.server_scope)) {
5321 dprintk("%s: server_scope mismatch detected\n",
5322 __func__);
5323 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5324 kfree(clp->cl_serverscope);
5325 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5326 }
5327
177313f1 5328 if (clp->cl_serverscope == NULL) {
79d4e1f0 5329 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5330 goto out;
5331 }
32b01310
TM		 5332 } else
5333 kfree(res.impl_id);
7d2ed9ac 5334
acdeb69d
CL		 5335out_server_owner:
5336 kfree(res.server_owner);
7d2ed9ac 5337out_server_scope:
abe9a6d5
WAA		 5338 kfree(res.server_scope);
5339out:
177313f1 5340 if (clp->cl_implid != NULL)
6bbb4ae8 5341 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5342 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5343 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5344 clp->cl_implid->date.seconds,
5345 clp->cl_implid->date.nseconds);
6bbb4ae8 5346 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5347 return status;
5348}
5349
66245539
TM		 5350static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5351 struct rpc_cred *cred)
5352{
5353 struct rpc_message msg = {
5354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5355 .rpc_argp = clp,
5356 .rpc_cred = cred,
5357 };
5358 int status;
5359
5360 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5361 if (status)
02c67525 5362 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5363 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5364 return status;
5365}
5366
5367static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5368 struct rpc_cred *cred)
5369{
5370 unsigned int loop;
5371 int ret;
5372
5373 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5374 ret = _nfs4_proc_destroy_clientid(clp, cred);
5375 switch (ret) {
5376 case -NFS4ERR_DELAY:
5377 case -NFS4ERR_CLIENTID_BUSY:
5378 ssleep(1);
5379 break;
5380 default:
5381 return ret;
5382 }
5383 }
5384 return 0;
5385}
5386
5387int nfs4_destroy_clientid(struct nfs_client *clp)
5388{
5389 struct rpc_cred *cred;
5390 int ret = 0;
5391
5392 if (clp->cl_mvops->minor_version < 1)
5393 goto out;
5394 if (clp->cl_exchange_flags == 0)
5395 goto out;
5396 cred = nfs4_get_exchange_id_cred(clp);
5397 ret = nfs4_proc_destroy_clientid(clp, cred);
5398 if (cred)
5399 put_rpccred(cred);
5400 switch (ret) {
5401 case 0:
5402 case -NFS4ERR_STALE_CLIENTID:
5403 clp->cl_exchange_flags = 0;
5404 }
5405out:
5406 return ret;
5407}
5408
2050f0cc
AA		 5409struct nfs4_get_lease_time_data {
5410 struct nfs4_get_lease_time_args *args;
5411 struct nfs4_get_lease_time_res *res;
5412 struct nfs_client *clp;
5413};
5414
5415static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5416 void *calldata)
5417{
5418 int ret;
5419 struct nfs4_get_lease_time_data *data =
5420 (struct nfs4_get_lease_time_data *)calldata;
5421
5422 dprintk("--> %s\n", __func__);
689cf5c1 5423 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5424 /* just setup sequence, do not trigger session recovery
5425 since we're invoked within one */
5426 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5427 &data->args->la_seq_args,
9d12b216 5428 &data->res->lr_seq_res, task);
2050f0cc
AA		 5429
5430 BUG_ON(ret == -EAGAIN);
5431 rpc_call_start(task);
5432 dprintk("<-- %s\n", __func__);
5433}
5434
5435/*
5436 * Called from nfs4_state_manager thread for session setup, so don't recover
5437 * from sequence operation or clientid errors.
5438 */
5439static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5440{
5441 struct nfs4_get_lease_time_data *data =
5442 (struct nfs4_get_lease_time_data *)calldata;
5443
5444 dprintk("--> %s\n", __func__);
14516c3a
TM		 5445 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5446 return;
2050f0cc
AA		 5447 switch (task->tk_status) {
5448 case -NFS4ERR_DELAY:
5449 case -NFS4ERR_GRACE:
5450 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5451 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5452 task->tk_status = 0;
a8a4ae3a
AA		 5453 /* fall through */
5454 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5455 rpc_restart_call_prepare(task);
2050f0cc
AA		 5456 return;
5457 }
2050f0cc
AA		 5458 dprintk("<-- %s\n", __func__);
5459}
5460
17280175 5461static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5462 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5463 .rpc_call_done = nfs4_get_lease_time_done,
5464};
5465
5466int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5467{
5468 struct rpc_task *task;
5469 struct nfs4_get_lease_time_args args;
5470 struct nfs4_get_lease_time_res res = {
5471 .lr_fsinfo = fsinfo,
5472 };
5473 struct nfs4_get_lease_time_data data = {
5474 .args = &args,
5475 .res = &res,
5476 .clp = clp,
5477 };
5478 struct rpc_message msg = {
5479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5480 .rpc_argp = &args,
5481 .rpc_resp = &res,
5482 };
5483 struct rpc_task_setup task_setup = {
5484 .rpc_client = clp->cl_rpcclient,
5485 .rpc_message = &msg,
5486 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5487 .callback_data = &data,
5488 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5489 };
5490 int status;
5491
9d12b216 5492 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5493 dprintk("--> %s\n", __func__);
5494 task = rpc_run_task(&task_setup);
5495
5496 if (IS_ERR(task))
5497 status = PTR_ERR(task);
5498 else {
5499 status = task->tk_status;
5500 rpc_put_task(task);
5501 }
5502 dprintk("<-- %s return %d\n", __func__, status);
5503
5504 return status;
5505}
5506
f86f36a6
TM		 5507static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5508{
5509 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5510}
5511
5512static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5513 struct nfs4_slot *new,
5514 u32 max_slots,
5515 u32 ivalue)
5516{
5517 struct nfs4_slot *old = NULL;
5518 u32 i;
5519
5520 spin_lock(&tbl->slot_tbl_lock);
5521 if (new) {
5522 old = tbl->slots;
5523 tbl->slots = new;
5524 tbl->max_slots = max_slots;
5525 }
5526 tbl->highest_used_slotid = -1; /* no slot is currently used */
5527 for (i = 0; i < tbl->max_slots; i++)
5528 tbl->slots[i].seq_nr = ivalue;
5529 spin_unlock(&tbl->slot_tbl_lock);
5530 kfree(old);
5531}
5532
b73dafa7 5533/*
f86f36a6 5534 * (re)Initialise a slot table
b73dafa7 5535 */
f86f36a6
TM		 5536static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5537 u32 ivalue)
ac72b7b3 5538{
104aeba4 5539 struct nfs4_slot *new = NULL;
f86f36a6 5540 int ret = -ENOMEM;
ac72b7b3 5541
104aeba4
AA		 5542 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5543 max_reqs, tbl->max_slots);
ac72b7b3 5544
104aeba4
AA		 5545 /* Does the newly negotiated max_reqs match the existing slot table? */
5546 if (max_reqs != tbl->max_slots) {
f86f36a6 5547 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5548 if (!new)
5549 goto out;
104aeba4 5550 }
f86f36a6
TM		 5551 ret = 0;
5552
5553 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5554 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5555 tbl, tbl->slots, tbl->max_slots);
5556out:
5557 dprintk("<-- %s: return %d\n", __func__, ret);
5558 return ret;
5559}
5560
f8625a6a
RL		 5561/* Destroy the slot table */
5562static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5563{
5564 if (session->fc_slot_table.slots != NULL) {
5565 kfree(session->fc_slot_table.slots);
5566 session->fc_slot_table.slots = NULL;
5567 }
5568 if (session->bc_slot_table.slots != NULL) {
5569 kfree(session->bc_slot_table.slots);
5570 session->bc_slot_table.slots = NULL;
5571 }
5572 return;
5573}
5574
050047ce 5575/*
aacd5537 5576 * Initialize or reset the forechannel and backchannel tables
050047ce 5577 */
aacd5537 5578static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5579{
f26468fb 5580 struct nfs4_slot_table *tbl;
aacd5537 5581 int status;
050047ce 5582
aacd5537
AA		 5583 dprintk("--> %s\n", __func__);
5584 /* Fore channel */
5585 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5586 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5587 if (status) /* -ENOMEM */
5588 return status;
aacd5537
AA		 5589 /* Back channel */
5590 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5591 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5592 if (status && tbl->slots == NULL)
5593 /* Fore and back channel share a connection so get
5594 * both slot tables or neither */
5595 nfs4_destroy_slot_tables(ses);
f8625a6a 5596 return status;
557134a3
AA		 5597}
5598
5599struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5600{
5601 struct nfs4_session *session;
5602 struct nfs4_slot_table *tbl;
5603
8535b2be 5604 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5605 if (!session)
5606 return NULL;
76db6d95 5607
557134a3 5608 tbl = &session->fc_slot_table;
45d43c29 5609 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5610 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5611 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5612 init_completion(&tbl->complete);
f8625a6a
RL		 5613
5614 tbl = &session->bc_slot_table;
45d43c29 5615 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5616 spin_lock_init(&tbl->slot_tbl_lock);
5617 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5618 init_completion(&tbl->complete);
f8625a6a 5619
1055d76d
TM		 5620 session->session_state = 1<<NFS4_SESSION_INITING;
5621
557134a3
AA		 5622 session->clp = clp;
5623 return session;
5624}
5625
5626void nfs4_destroy_session(struct nfs4_session *session)
5627{
2446ab60 5628 struct rpc_xprt *xprt;
848f5bda 5629 struct rpc_cred *cred;
2446ab60 5630
848f5bda
TM		 5631 cred = nfs4_get_exchange_id_cred(session->clp);
5632 nfs4_proc_destroy_session(session, cred);
5633 if (cred)
5634 put_rpccred(cred);
2446ab60
TM		 5635
5636 rcu_read_lock();
5637 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5638 rcu_read_unlock();
5a0ffe54 5639 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5640 __func__, xprt);
5641 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5642 nfs4_destroy_slot_tables(session);
557134a3
AA		 5643 kfree(session);
5644}
5645
fc931582
AA		 5646/*
5647 * Initialize the values to be used by the client in CREATE_SESSION
5648 * If nfs4_init_session set the fore channel request and response sizes,
5649 * use them.
5650 *
5651 * Set the back channel max_resp_sz_cached to zero to force the client to
5652 * always set csa_cachethis to FALSE because the current implementation
5653 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5654 */
5655static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5656{
5657 struct nfs4_session *session = args->client->cl_session;
5658 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5659 mxresp_sz = session->fc_attrs.max_resp_sz;
5660
5661 if (mxrqst_sz == 0)
5662 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5663 if (mxresp_sz == 0)
5664 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5665 /* Fore channel attributes */
fc931582
AA		 5666 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5667 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5668 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5669 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5670
5671 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5672 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5673 __func__,
5674 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5675 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5676
5677 /* Back channel attributes */
fc931582
AA		 5678 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5679 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5680 args->bc_attrs.max_resp_sz_cached = 0;
5681 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5682 args->bc_attrs.max_reqs = 1;
5683
5684 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5685 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5686 __func__,
5687 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5688 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5689 args->bc_attrs.max_reqs);
5690}
5691
43c2e885 5692static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5693{
43c2e885
BF		 5694 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5695 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5696
43c2e885
BF		 5697 if (rcvd->max_resp_sz > sent->max_resp_sz)
5698 return -EINVAL;
5699 /*
5700 * Our requested max_ops is the minimum we need; we're not
5701 * prepared to break up compounds into smaller pieces than that.
5702 * So, no point even trying to continue if the server won't
5703 * cooperate:
5704 */
5705 if (rcvd->max_ops < sent->max_ops)
5706 return -EINVAL;
5707 if (rcvd->max_reqs == 0)
5708 return -EINVAL;
b4b9a0c1
VG		 5709 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5710 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5711 return 0;
8d35301d
AA		 5712}
5713
43c2e885
BF		 5714static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5715{
5716 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5717 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5718
43c2e885
BF		 5719 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5720 return -EINVAL;
5721 if (rcvd->max_resp_sz < sent->max_resp_sz)
5722 return -EINVAL;
5723 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5724 return -EINVAL;
5725 /* These would render the backchannel useless: */
b4b9a0c1 5726 if (rcvd->max_ops != sent->max_ops)
43c2e885 5727 return -EINVAL;
b4b9a0c1 5728 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5729 return -EINVAL;
5730 return 0;
5731}
8d35301d 5732
8d35301d
AA		 5733static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5734 struct nfs4_session *session)
5735{
43c2e885 5736 int ret;
8d35301d 5737
43c2e885
BF		 5738 ret = nfs4_verify_fore_channel_attrs(args, session);
5739 if (ret)
5740 return ret;
5741 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5742}
5743
848f5bda
TM		 5744static int _nfs4_proc_create_session(struct nfs_client *clp,
5745 struct rpc_cred *cred)
fc931582
AA		 5746{
5747 struct nfs4_session *session = clp->cl_session;
5748 struct nfs41_create_session_args args = {
5749 .client = clp,
5750 .cb_program = NFS4_CALLBACK,
5751 };
5752 struct nfs41_create_session_res res = {
5753 .client = clp,
5754 };
5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5757 .rpc_argp = &args,
5758 .rpc_resp = &res,
848f5bda 5759 .rpc_cred = cred,
fc931582
AA		 5760 };
5761 int status;
5762
5763 nfs4_init_channel_attrs(&args);
0f91421e 5764 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5765
1bd714f2 5766 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5767
8d35301d
AA		 5768 if (!status)
5769 /* Verify the session's negotiated channel_attrs values */
5770 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5771 if (!status) {
5772 /* Increment the clientid slot sequence id */
5773 clp->cl_seqid++;
5774 }
5775
5776 return status;
5777}
5778
5779/*
5780 * Issues a CREATE_SESSION operation to the server.
5781 * It is the responsibility of the caller to verify the session is
5782 * expired before calling this routine.
5783 */
848f5bda 5784int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5785{
5786 int status;
5787 unsigned *ptr;
fc931582
AA		 5788 struct nfs4_session *session = clp->cl_session;
5789
5790 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5791
848f5bda 5792 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5793 if (status)
5794 goto out;
5795
aacd5537
AA		 5796 /* Init or reset the session slot tables */
5797 status = nfs4_setup_session_slot_tables(session);
5798 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5799 if (status)
5800 goto out;
5801
5802 ptr = (unsigned *)&session->sess_id.data[0];
5803 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5804 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5805out:
5806 dprintk("<-- %s\n", __func__);
5807 return status;
5808}
5809
0f3e66c6
AA		 5810/*
5811 * Issue the over-the-wire RPC DESTROY_SESSION.
5812 * The caller must serialize access to this routine.
5813 */
848f5bda
TM		 5814int nfs4_proc_destroy_session(struct nfs4_session *session,
5815 struct rpc_cred *cred)
0f3e66c6 5816{
848f5bda
TM		 5817 struct rpc_message msg = {
5818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5819 .rpc_argp = session,
5820 .rpc_cred = cred,
5821 };
0f3e66c6 5822 int status = 0;
0f3e66c6
AA		 5823
5824 dprintk("--> nfs4_proc_destroy_session\n");
5825
5826 /* session is still being setup */
5827 if (session->clp->cl_cons_state != NFS_CS_READY)
5828 return status;
5829
1bd714f2 5830 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5831
5832 if (status)
08106ac7 5833 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5834 "Session has been destroyed regardless...\n", status);
5835
5836 dprintk("<-- nfs4_proc_destroy_session\n");
5837 return status;
5838}
5839
7b38c368
TM		 5840/*
5841 * With sessions, the client is not marked ready until after a
5842 * successful EXCHANGE_ID and CREATE_SESSION.
5843 *
5844 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5845 * other versions of NFS can be tried.
5846 */
5847static int nfs41_check_session_ready(struct nfs_client *clp)
5848{
5849 int ret;
5850
5851 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5852 ret = nfs4_client_recover_expired_lease(clp);
5853 if (ret)
5854 return ret;
5855 }
5856 if (clp->cl_cons_state < NFS_CS_READY)
5857 return -EPROTONOSUPPORT;
54ac471c 5858 smp_rmb();
7b38c368
TM		 5859 return 0;
5860}
5861
fccba804
TM		 5862int nfs4_init_session(struct nfs_server *server)
5863{
5864 struct nfs_client *clp = server->nfs_client;
2449ea2e 5865 struct nfs4_session *session;
68bf05ef 5866 unsigned int rsize, wsize;
fccba804
TM		 5867
5868 if (!nfs4_has_session(clp))
5869 return 0;
5870
1055d76d 5871 session = clp->cl_session;
7b38c368
TM		 5872 spin_lock(&clp->cl_lock);
5873 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5874
7b38c368
TM		 5875 rsize = server->rsize;
5876 if (rsize == 0)
5877 rsize = NFS_MAX_FILE_IO_SIZE;
5878 wsize = server->wsize;
5879 if (wsize == 0)
5880 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5881
7b38c368
TM		 5882 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5883 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5884 }
5885 spin_unlock(&clp->cl_lock);
2449ea2e 5886
7b38c368 5887 return nfs41_check_session_ready(clp);
fccba804
TM		 5888}
5889
7b38c368 5890int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5891{
5892 struct nfs4_session *session = clp->cl_session;
5893 int ret;
5894
7b38c368
TM		 5895 spin_lock(&clp->cl_lock);
5896 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5897 /*
5898 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5899 * DS lease to be equal to the MDS lease.
5900 */
5901 clp->cl_lease_time = lease_time;
5902 clp->cl_last_renewal = jiffies;
5903 }
5904 spin_unlock(&clp->cl_lock);
d83217c1 5905
7b38c368
TM		 5906 ret = nfs41_check_session_ready(clp);
5907 if (ret)
5908 return ret;
5909 /* Test for the DS role */
5910 if (!is_ds_client(clp))
5911 return -ENODEV;
5912 return 0;
d83217c1
AA		 5913}
5914EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5915
5916
fc01cea9
AA		 5917/*
5918 * Renew the cl_session lease.
5919 */
d5f8d3fe
TM		 5920struct nfs4_sequence_data {
5921 struct nfs_client *clp;
5922 struct nfs4_sequence_args args;
5923 struct nfs4_sequence_res res;
5924};
5925
dc96aef9
AB		 5926static void nfs41_sequence_release(void *data)
5927{
d5f8d3fe
TM		 5928 struct nfs4_sequence_data *calldata = data;
5929 struct nfs_client *clp = calldata->clp;
dc96aef9 5930
7135840f
AB		 5931 if (atomic_read(&clp->cl_count) > 1)
5932 nfs4_schedule_state_renewal(clp);
5933 nfs_put_client(clp);
d5f8d3fe 5934 kfree(calldata);
dc96aef9
AB		 5935}
5936
aa5190d0
TM		 5937static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5938{
5939 switch(task->tk_status) {
5940 case -NFS4ERR_DELAY:
aa5190d0
TM		 5941 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5942 return -EAGAIN;
5943 default:
0400a6b0 5944 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5945 }
5946 return 0;
5947}
5948
dc96aef9 5949static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5950{
d5f8d3fe
TM		 5951 struct nfs4_sequence_data *calldata = data;
5952 struct nfs_client *clp = calldata->clp;
fc01cea9 5953
14516c3a
TM		 5954 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5955 return;
fc01cea9
AA		 5956
5957 if (task->tk_status < 0) {
5958 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5959 if (atomic_read(&clp->cl_count) == 1)
5960 goto out;
fc01cea9 5961
aa5190d0
TM		 5962 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5963 rpc_restart_call_prepare(task);
fc01cea9
AA		 5964 return;
5965 }
5966 }
fc01cea9 5967 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5968out:
fc01cea9
AA		 5969 dprintk("<-- %s\n", __func__);
5970}
5971
5972static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5973{
d5f8d3fe
TM		 5974 struct nfs4_sequence_data *calldata = data;
5975 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5976 struct nfs4_sequence_args *args;
5977 struct nfs4_sequence_res *res;
5978
fc01cea9
AA		 5979 args = task->tk_msg.rpc_argp;
5980 res = task->tk_msg.rpc_resp;
5981
9d12b216 5982 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5983 return;
5984 rpc_call_start(task);
5985}
5986
5987static const struct rpc_call_ops nfs41_sequence_ops = {
5988 .rpc_call_done = nfs41_sequence_call_done,
5989 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5990 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5991};
5992
71ac6da9 5993static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5994{
d5f8d3fe 5995 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5996 struct rpc_message msg = {
5997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5998 .rpc_cred = cred,
5999 };
71ac6da9
TM		 6000 struct rpc_task_setup task_setup_data = {
6001 .rpc_client = clp->cl_rpcclient,
6002 .rpc_message = &msg,
6003 .callback_ops = &nfs41_sequence_ops,
6004 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6005 };
fc01cea9 6006
7135840f 6007 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6008 return ERR_PTR(-EIO);
dfb4f309 6009 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6010 if (calldata == NULL) {
7135840f 6011 nfs_put_client(clp);
71ac6da9 6012 return ERR_PTR(-ENOMEM);
fc01cea9 6013 }
9d12b216 6014 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6015 msg.rpc_argp = &calldata->args;
6016 msg.rpc_resp = &calldata->res;
6017 calldata->clp = clp;
71ac6da9 6018 task_setup_data.callback_data = calldata;
fc01cea9 6019
71ac6da9
TM		 6020 return rpc_run_task(&task_setup_data);
6021}
6022
2f60ea6b 6023static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6024{
6025 struct rpc_task *task;
6026 int ret = 0;
6027
2f60ea6b
TM		 6028 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6029 return 0;
71ac6da9
TM		 6030 task = _nfs41_proc_sequence(clp, cred);
6031 if (IS_ERR(task))
6032 ret = PTR_ERR(task);
6033 else
bf294b41 6034 rpc_put_task_async(task);
71ac6da9
TM		 6035 dprintk("<-- %s status=%d\n", __func__, ret);
6036 return ret;
6037}
6038
6039static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6040{
6041 struct rpc_task *task;
6042 int ret;
6043
6044 task = _nfs41_proc_sequence(clp, cred);
6045 if (IS_ERR(task)) {
6046 ret = PTR_ERR(task);
6047 goto out;
6048 }
6049 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6050 if (!ret) {
6051 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6052
6053 if (task->tk_status == 0)
6054 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6055 ret = task->tk_status;
b4410c2f 6056 }
71ac6da9
TM		 6057 rpc_put_task(task);
6058out:
6059 dprintk("<-- %s status=%d\n", __func__, ret);
6060 return ret;
fc01cea9
AA		 6061}
6062
fce5c838
RL		 6063struct nfs4_reclaim_complete_data {
6064 struct nfs_client *clp;
6065 struct nfs41_reclaim_complete_args arg;
6066 struct nfs41_reclaim_complete_res res;
6067};
6068
6069static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6070{
6071 struct nfs4_reclaim_complete_data *calldata = data;
6072
b257957e 6073 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6074 if (nfs41_setup_sequence(calldata->clp->cl_session,
6075 &calldata->arg.seq_args,
9d12b216 6076 &calldata->res.seq_res, task))
fce5c838
RL		 6077 return;
6078
6079 rpc_call_start(task);
6080}
6081
aa5190d0
TM		 6082static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6083{
6084 switch(task->tk_status) {
6085 case 0:
6086 case -NFS4ERR_COMPLETE_ALREADY:
6087 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6088 break;
6089 case -NFS4ERR_DELAY:
aa5190d0 6090 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6091 /* fall through */
6092 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6093 return -EAGAIN;
6094 default:
0400a6b0 6095 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6096 }
6097 return 0;
6098}
6099
fce5c838
RL		 6100static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6101{
6102 struct nfs4_reclaim_complete_data *calldata = data;
6103 struct nfs_client *clp = calldata->clp;
6104 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6105
6106 dprintk("--> %s\n", __func__);
14516c3a
TM		 6107 if (!nfs41_sequence_done(task, res))
6108 return;
fce5c838 6109
aa5190d0
TM		 6110 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6111 rpc_restart_call_prepare(task);
6112 return;
6113 }
fce5c838
RL		 6114 dprintk("<-- %s\n", __func__);
6115}
6116
6117static void nfs4_free_reclaim_complete_data(void *data)
6118{
6119 struct nfs4_reclaim_complete_data *calldata = data;
6120
6121 kfree(calldata);
6122}
6123
6124static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6125 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6126 .rpc_call_done = nfs4_reclaim_complete_done,
6127 .rpc_release = nfs4_free_reclaim_complete_data,
6128};
6129
6130/*
6131 * Issue a global reclaim complete.
6132 */
6133static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6134{
6135 struct nfs4_reclaim_complete_data *calldata;
6136 struct rpc_task *task;
6137 struct rpc_message msg = {
6138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6139 };
6140 struct rpc_task_setup task_setup_data = {
6141 .rpc_client = clp->cl_rpcclient,
6142 .rpc_message = &msg,
6143 .callback_ops = &nfs4_reclaim_complete_call_ops,
6144 .flags = RPC_TASK_ASYNC,
6145 };
6146 int status = -ENOMEM;
6147
6148 dprintk("--> %s\n", __func__);
8535b2be 6149 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6150 if (calldata == NULL)
6151 goto out;
6152 calldata->clp = clp;
6153 calldata->arg.one_fs = 0;
fce5c838 6154
9d12b216 6155 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6156 msg.rpc_argp = &calldata->arg;
6157 msg.rpc_resp = &calldata->res;
6158 task_setup_data.callback_data = calldata;
6159 task = rpc_run_task(&task_setup_data);
acf82b85 6160 if (IS_ERR(task)) {
fce5c838 6161 status = PTR_ERR(task);
acf82b85
DC		 6162 goto out;
6163 }
c34c32ea
AA		 6164 status = nfs4_wait_for_completion_rpc_task(task);
6165 if (status == 0)
6166 status = task->tk_status;
fce5c838 6167 rpc_put_task(task);
acf82b85 6168 return 0;
fce5c838
RL		 6169out:
6170 dprintk("<-- %s status=%d\n", __func__, status);
6171 return status;
6172}
b1f69b75
AA		 6173
6174static void
6175nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6176{
6177 struct nfs4_layoutget *lgp = calldata;
c31663d4 6178 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6179
6180 dprintk("--> %s\n", __func__);
c31663d4
FI		 6181 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6182 * right now covering the LAYOUTGET we are about to send.
6183 * However, that is not so catastrophic, and there seems
6184 * to be no way to prevent it completely.
6185 */
b1f69b75 6186 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6187 &lgp->res.seq_res, task))
b1f69b75 6188 return;
cf7d63f1
FI		 6189 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6190 NFS_I(lgp->args.inode)->layout,
6191 lgp->args.ctx->state)) {
6192 rpc_exit(task, NFS4_OK);
6193 return;
6194 }
b1f69b75
AA		 6195 rpc_call_start(task);
6196}
6197
6198static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6199{
6200 struct nfs4_layoutget *lgp = calldata;
6201 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6202
6203 dprintk("--> %s\n", __func__);
6204
6205 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6206 return;
6207
6208 switch (task->tk_status) {
6209 case 0:
6210 break;
6211 case -NFS4ERR_LAYOUTTRYLATER:
6212 case -NFS4ERR_RECALLCONFLICT:
6213 task->tk_status = -NFS4ERR_DELAY;
6214 /* Fall through */
6215 default:
6216 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6217 rpc_restart_call_prepare(task);
6218 return;
6219 }
6220 }
b1f69b75
AA		 6221 dprintk("<-- %s\n", __func__);
6222}
6223
8554116e
IK		 6224static size_t max_response_pages(struct nfs_server *server)
6225{
6226 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6227 return nfs_page_array_len(0, max_resp_sz);
6228}
6229
6230static void nfs4_free_pages(struct page **pages, size_t size)
6231{
6232 int i;
6233
6234 if (!pages)
6235 return;
6236
6237 for (i = 0; i < size; i++) {
6238 if (!pages[i])
6239 break;
6240 __free_page(pages[i]);
6241 }
6242 kfree(pages);
6243}
6244
6245static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6246{
6247 struct page **pages;
6248 int i;
6249
6250 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6251 if (!pages) {
6252 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6253 return NULL;
6254 }
6255
6256 for (i = 0; i < size; i++) {
6257 pages[i] = alloc_page(gfp_flags);
6258 if (!pages[i]) {
6259 dprintk("%s: failed to allocate page\n", __func__);
6260 nfs4_free_pages(pages, size);
6261 return NULL;
6262 }
6263 }
6264
6265 return pages;
6266}
6267
b1f69b75
AA		 6268static void nfs4_layoutget_release(void *calldata)
6269{
6270 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6271 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6272 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6273
6274 dprintk("--> %s\n", __func__);
8554116e 6275 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6276 put_nfs_open_context(lgp->args.ctx);
6277 kfree(calldata);
6278 dprintk("<-- %s\n", __func__);
6279}
6280
6281static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6282 .rpc_call_prepare = nfs4_layoutget_prepare,
6283 .rpc_call_done = nfs4_layoutget_done,
6284 .rpc_release = nfs4_layoutget_release,
6285};
6286
a0b0a6e3
TM		 6287struct pnfs_layout_segment *
6288nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6289{
6290 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6291 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6292 struct rpc_task *task;
6293 struct rpc_message msg = {
6294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6295 .rpc_argp = &lgp->args,
6296 .rpc_resp = &lgp->res,
6297 };
6298 struct rpc_task_setup task_setup_data = {
6299 .rpc_client = server->client,
6300 .rpc_message = &msg,
6301 .callback_ops = &nfs4_layoutget_call_ops,
6302 .callback_data = lgp,
6303 .flags = RPC_TASK_ASYNC,
6304 };
a0b0a6e3 6305 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6306 int status = 0;
6307
6308 dprintk("--> %s\n", __func__);
6309
8554116e
IK		 6310 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6311 if (!lgp->args.layout.pages) {
6312 nfs4_layoutget_release(lgp);
a0b0a6e3 6313 return ERR_PTR(-ENOMEM);
8554116e
IK		 6314 }
6315 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6316
35124a09 6317 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6318 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6319 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6320 task = rpc_run_task(&task_setup_data);
6321 if (IS_ERR(task))
a0b0a6e3 6322 return ERR_CAST(task);
b1f69b75 6323 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6324 if (status == 0)
6325 status = task->tk_status;
6326 if (status == 0)
a0b0a6e3 6327 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6328 rpc_put_task(task);
6329 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6330 if (status)
6331 return ERR_PTR(status);
6332 return lseg;
b1f69b75
AA		 6333}
6334
cbe82603
BH		 6335static void
6336nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6337{
6338 struct nfs4_layoutreturn *lrp = calldata;
6339
6340 dprintk("--> %s\n", __func__);
6341 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6342 &lrp->res.seq_res, task))
cbe82603
BH		 6343 return;
6344 rpc_call_start(task);
6345}
6346
6347static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6348{
6349 struct nfs4_layoutreturn *lrp = calldata;
6350 struct nfs_server *server;
a56aaa02 6351 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6352
6353 dprintk("--> %s\n", __func__);
6354
6355 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6356 return;
6357
6358 server = NFS_SERVER(lrp->args.inode);
6359 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6360 rpc_restart_call_prepare(task);
cbe82603
BH		 6361 return;
6362 }
a2e1d4f2 6363 spin_lock(&lo->plh_inode->i_lock);
47fbf797
TM		 6364 if (task->tk_status == 0 && lrp->res.lrs_present)
6365 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
a2e1d4f2
FI		 6366 lo->plh_block_lgets--;
6367 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6368 dprintk("<-- %s\n", __func__);
6369}
6370
6371static void nfs4_layoutreturn_release(void *calldata)
6372{
6373 struct nfs4_layoutreturn *lrp = calldata;
6374
6375 dprintk("--> %s\n", __func__);
70c3bd2b 6376 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6377 kfree(calldata);
6378 dprintk("<-- %s\n", __func__);
6379}
6380
6381static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6382 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6383 .rpc_call_done = nfs4_layoutreturn_done,
6384 .rpc_release = nfs4_layoutreturn_release,
6385};
6386
6387int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6388{
6389 struct rpc_task *task;
6390 struct rpc_message msg = {
6391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6392 .rpc_argp = &lrp->args,
6393 .rpc_resp = &lrp->res,
6394 };
6395 struct rpc_task_setup task_setup_data = {
6396 .rpc_client = lrp->clp->cl_rpcclient,
6397 .rpc_message = &msg,
6398 .callback_ops = &nfs4_layoutreturn_call_ops,
6399 .callback_data = lrp,
6400 };
6401 int status;
6402
6403 dprintk("--> %s\n", __func__);
9d12b216 6404 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6405 task = rpc_run_task(&task_setup_data);
6406 if (IS_ERR(task))
6407 return PTR_ERR(task);
6408 status = task->tk_status;
6409 dprintk("<-- %s status=%d\n", __func__, status);
6410 rpc_put_task(task);
6411 return status;
6412}
6413
7f11d8d3
AA		 6414/*
6415 * Retrieve the list of Data Server devices from the MDS.
6416 */
6417static int _nfs4_getdevicelist(struct nfs_server *server,
6418 const struct nfs_fh *fh,
6419 struct pnfs_devicelist *devlist)
6420{
6421 struct nfs4_getdevicelist_args args = {
6422 .fh = fh,
6423 .layoutclass = server->pnfs_curr_ld->id,
6424 };
6425 struct nfs4_getdevicelist_res res = {
6426 .devlist = devlist,
6427 };
6428 struct rpc_message msg = {
6429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6430 .rpc_argp = &args,
6431 .rpc_resp = &res,
6432 };
6433 int status;
6434
6435 dprintk("--> %s\n", __func__);
6436 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6437 &res.seq_res, 0);
6438 dprintk("<-- %s status=%d\n", __func__, status);
6439 return status;
6440}
6441
6442int nfs4_proc_getdevicelist(struct nfs_server *server,
6443 const struct nfs_fh *fh,
6444 struct pnfs_devicelist *devlist)
6445{
6446 struct nfs4_exception exception = { };
6447 int err;
6448
6449 do {
6450 err = nfs4_handle_exception(server,
6451 _nfs4_getdevicelist(server, fh, devlist),
6452 &exception);
6453 } while (exception.retry);
6454
6455 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6456 err, devlist->num_devs);
6457
6458 return err;
6459}
6460EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6461
b1f69b75
AA		 6462static int
6463_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6464{
6465 struct nfs4_getdeviceinfo_args args = {
6466 .pdev = pdev,
6467 };
6468 struct nfs4_getdeviceinfo_res res = {
6469 .pdev = pdev,
6470 };
6471 struct rpc_message msg = {
6472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6473 .rpc_argp = &args,
6474 .rpc_resp = &res,
6475 };
6476 int status;
6477
6478 dprintk("--> %s\n", __func__);
7c513058 6479 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6480 dprintk("<-- %s status=%d\n", __func__, status);
6481
6482 return status;
6483}
6484
6485int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6486{
6487 struct nfs4_exception exception = { };
6488 int err;
6489
6490 do {
6491 err = nfs4_handle_exception(server,
6492 _nfs4_proc_getdeviceinfo(server, pdev),
6493 &exception);
6494 } while (exception.retry);
6495 return err;
6496}
6497EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6498
863a3c6c
AA		 6499static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6500{
6501 struct nfs4_layoutcommit_data *data = calldata;
6502 struct nfs_server *server = NFS_SERVER(data->args.inode);
6503
6504 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6505 &data->res.seq_res, task))
863a3c6c
AA		 6506 return;
6507 rpc_call_start(task);
6508}
6509
6510static void
6511nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6512{
6513 struct nfs4_layoutcommit_data *data = calldata;
6514 struct nfs_server *server = NFS_SERVER(data->args.inode);
6515
6516 if (!nfs4_sequence_done(task, &data->res.seq_res))
6517 return;
6518
6519 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6520 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6521 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6522 case -NFS4ERR_BADLAYOUT: /* no layout */
6523 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6524 task->tk_status = 0;
e59d27e0
TM		 6525 break;
6526 case 0:
863a3c6c
AA		 6527 nfs_post_op_update_inode_force_wcc(data->args.inode,
6528 data->res.fattr);
e59d27e0
TM		 6529 break;
6530 default:
6531 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6532 rpc_restart_call_prepare(task);
6533 return;
6534 }
6535 }
863a3c6c
AA		 6536}
6537
6538static void nfs4_layoutcommit_release(void *calldata)
6539{
6540 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6541 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6542 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6543
db29c089 6544 pnfs_cleanup_layoutcommit(data);
863a3c6c 6545 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6546 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6547 list_del_init(&lseg->pls_lc_list);
6548 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6549 &lseg->pls_flags))
9369a431 6550 pnfs_put_lseg(lseg);
a9bae566 6551 }
92407e75
PT		 6552
6553 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6554 smp_mb__after_clear_bit();
6555 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6556
863a3c6c
AA		 6557 put_rpccred(data->cred);
6558 kfree(data);
6559}
6560
6561static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6562 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6563 .rpc_call_done = nfs4_layoutcommit_done,
6564 .rpc_release = nfs4_layoutcommit_release,
6565};
6566
6567int
ef311537 6568nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6569{
6570 struct rpc_message msg = {
6571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6572 .rpc_argp = &data->args,
6573 .rpc_resp = &data->res,
6574 .rpc_cred = data->cred,
6575 };
6576 struct rpc_task_setup task_setup_data = {
6577 .task = &data->task,
6578 .rpc_client = NFS_CLIENT(data->args.inode),
6579 .rpc_message = &msg,
6580 .callback_ops = &nfs4_layoutcommit_ops,
6581 .callback_data = data,
6582 .flags = RPC_TASK_ASYNC,
6583 };
6584 struct rpc_task *task;
6585 int status = 0;
6586
6587 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6588 "lbw: %llu inode %lu\n",
6589 data->task.tk_pid, sync,
6590 data->args.lastbytewritten,
6591 data->args.inode->i_ino);
6592
9d12b216 6593 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6594 task = rpc_run_task(&task_setup_data);
6595 if (IS_ERR(task))
6596 return PTR_ERR(task);
ef311537 6597 if (sync == false)
863a3c6c
AA		 6598 goto out;
6599 status = nfs4_wait_for_completion_rpc_task(task);
6600 if (status != 0)
6601 goto out;
6602 status = task->tk_status;
6603out:
6604 dprintk("%s: status %d\n", __func__, status);
6605 rpc_put_task(task);
6606 return status;
6607}
fca78d6d
BS		 6608
6609static int
6610_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6611 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6612{
6613 struct nfs41_secinfo_no_name_args args = {
6614 .style = SECINFO_STYLE_CURRENT_FH,
6615 };
6616 struct nfs4_secinfo_res res = {
6617 .flavors = flavors,
6618 };
6619 struct rpc_message msg = {
6620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6621 .rpc_argp = &args,
6622 .rpc_resp = &res,
6623 };
6624 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6625}
6626
6627static int
6628nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6629 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6630{
6631 struct nfs4_exception exception = { };
6632 int err;
6633 do {
6634 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6635 switch (err) {
6636 case 0:
6637 case -NFS4ERR_WRONGSEC:
6638 case -NFS4ERR_NOTSUPP:
05e9cfb4 6639 goto out;
fca78d6d
BS		 6640 default:
6641 err = nfs4_handle_exception(server, err, &exception);
6642 }
6643 } while (exception.retry);
05e9cfb4 6644out:
fca78d6d
BS		 6645 return err;
6646}
6647
6648static int
6649nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6650 struct nfs_fsinfo *info)
6651{
6652 int err;
6653 struct page *page;
6654 rpc_authflavor_t flavor;
6655 struct nfs4_secinfo_flavors *flavors;
6656
6657 page = alloc_page(GFP_KERNEL);
6658 if (!page) {
6659 err = -ENOMEM;
6660 goto out;
6661 }
6662
6663 flavors = page_address(page);
6664 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6665
6666 /*
6667 * Fall back on "guess and check" method if
6668 * the server doesn't support SECINFO_NO_NAME
6669 */
6670 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6671 err = nfs4_find_root_sec(server, fhandle, info);
6672 goto out_freepage;
6673 }
6674 if (err)
6675 goto out_freepage;
6676
6677 flavor = nfs_find_best_sec(flavors);
6678 if (err == 0)
6679 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6680
6681out_freepage:
6682 put_page(page);
6683 if (err == -EACCES)
6684 return -EPERM;
6685out:
6686 return err;
6687}
1cab0652
BS		 6688
6689static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6690{
6691 int status;
6692 struct nfs41_test_stateid_args args = {
1cab0652 6693 .stateid = stateid,
7d974794
BS		 6694 };
6695 struct nfs41_test_stateid_res res;
6696 struct rpc_message msg = {
6697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6698 .rpc_argp = &args,
6699 .rpc_resp = &res,
6700 };
1cab0652 6701
38527b15 6702 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6703 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6704 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6705 if (status != NFS_OK) {
6706 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6707 return status;
38527b15
CL		 6708 }
6709 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6710 return -res.status;
7d974794
BS		 6711}
6712
38527b15
CL		 6713/**
6714 * nfs41_test_stateid - perform a TEST_STATEID operation
6715 *
6716 * @server: server / transport on which to perform the operation
6717 * @stateid: state ID to test
6718 *
6719 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6720 * Otherwise a negative NFS4ERR value is returned if the operation
6721 * failed or the state ID is not currently valid.
6722 */
1cab0652 6723static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6724{
6725 struct nfs4_exception exception = { };
6726 int err;
6727 do {
377e507d
CL		 6728 err = _nfs41_test_stateid(server, stateid);
6729 if (err != -NFS4ERR_DELAY)
6730 break;
6731 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6732 } while (exception.retry);
6733 return err;
6734}
9aeda35f 6735
1cab0652 6736static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6737{
9aeda35f 6738 struct nfs41_free_stateid_args args = {
1cab0652 6739 .stateid = stateid,
9aeda35f
BS		 6740 };
6741 struct nfs41_free_stateid_res res;
6742 struct rpc_message msg = {
6743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6744 .rpc_argp = &args,
6745 .rpc_resp = &res,
6746 };
38527b15 6747 int status;
9aeda35f 6748
38527b15 6749 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6750 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6751 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6752 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6753 dprintk("NFS reply free_stateid: %d\n", status);
6754 return status;
9aeda35f
BS		 6755}
6756
38527b15
CL		 6757/**
6758 * nfs41_free_stateid - perform a FREE_STATEID operation
6759 *
6760 * @server: server / transport on which to perform the operation
6761 * @stateid: state ID to release
6762 *
6763 * Returns NFS_OK if the server freed "stateid". Otherwise a
6764 * negative NFS4ERR value is returned.
6765 */
1cab0652 6766static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6767{
6768 struct nfs4_exception exception = { };
6769 int err;
6770 do {
377e507d
CL		 6771 err = _nfs4_free_stateid(server, stateid);
6772 if (err != -NFS4ERR_DELAY)
6773 break;
6774 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6775 } while (exception.retry);
6776 return err;
6777}
36281caa
TM		 6778
6779static bool nfs41_match_stateid(const nfs4_stateid *s1,
6780 const nfs4_stateid *s2)
6781{
2d2f24ad 6782 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6783 return false;
6784
2d2f24ad 6785 if (s1->seqid == s2->seqid)
36281caa 6786 return true;
2d2f24ad 6787 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6788 return true;
6789
6790 return false;
6791}
6792
557134a3
AA		 6793#endif /* CONFIG_NFS_V4_1 */
6794
36281caa
TM		 6795static bool nfs4_match_stateid(const nfs4_stateid *s1,
6796 const nfs4_stateid *s2)
6797{
f597c537 6798 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6799}
6800
6801
17280175 6802static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6803 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6804 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6805 .recover_open = nfs4_open_reclaim,
6806 .recover_lock = nfs4_lock_reclaim,
591d71cb 6807 .establish_clid = nfs4_init_clientid,
90a16617 6808 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6809};
6810
591d71cb 6811#if defined(CONFIG_NFS_V4_1)
17280175 6812static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6813 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6814 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6815 .recover_open = nfs4_open_reclaim,
6816 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6817 .establish_clid = nfs41_init_clientid,
b4b82607 6818 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6819 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6820};
6821#endif /* CONFIG_NFS_V4_1 */
6822
17280175 6823static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6824 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6825 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6826 .recover_open = nfs4_open_expired,
6827 .recover_lock = nfs4_lock_expired,
6828 .establish_clid = nfs4_init_clientid,
90a16617 6829 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6830};
6831
6832#if defined(CONFIG_NFS_V4_1)
17280175 6833static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6834 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6835 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6836 .recover_open = nfs41_open_expired,
6837 .recover_lock = nfs41_lock_expired,
4d643d1d 6838 .establish_clid = nfs41_init_clientid,
b4b82607 6839 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6840};
591d71cb 6841#endif /* CONFIG_NFS_V4_1 */
1da177e4 6842
17280175 6843static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6844 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6845 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6846 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6847};
6848
6849#if defined(CONFIG_NFS_V4_1)
17280175 6850static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6851 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6852 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6853 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6854};
6855#endif
6856
97dc1359
TM		 6857static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6858 .minor_version = 0,
6859 .call_sync = _nfs4_call_sync,
36281caa 6860 .match_stateid = nfs4_match_stateid,
fca78d6d 6861 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6862 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6863 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6864 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6865};
6866
6867#if defined(CONFIG_NFS_V4_1)
6868static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6869 .minor_version = 1,
6870 .call_sync = _nfs4_call_sync_session,
36281caa 6871 .match_stateid = nfs41_match_stateid,
fca78d6d 6872 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6873 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6874 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6875 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6876};
6877#endif
6878
97dc1359
TM		 6879const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6880 [0] = &nfs_v4_0_minor_ops,
6881#if defined(CONFIG_NFS_V4_1)
6882 [1] = &nfs_v4_1_minor_ops,
6883#endif
6884};
6885
73a79706
BS		 6886const struct inode_operations nfs4_dir_inode_operations = {
6887 .create = nfs_create,
6888 .lookup = nfs_lookup,
6889 .atomic_open = nfs_atomic_open,
6890 .link = nfs_link,
6891 .unlink = nfs_unlink,
6892 .symlink = nfs_symlink,
6893 .mkdir = nfs_mkdir,
6894 .rmdir = nfs_rmdir,
6895 .mknod = nfs_mknod,
6896 .rename = nfs_rename,
6897 .permission = nfs_permission,
6898 .getattr = nfs_getattr,
6899 .setattr = nfs_setattr,
6900 .getxattr = generic_getxattr,
6901 .setxattr = generic_setxattr,
6902 .listxattr = generic_listxattr,
6903 .removexattr = generic_removexattr,
6904};
6905
92e1d5be 6906static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6907 .permission = nfs_permission,
6908 .getattr = nfs_getattr,
6909 .setattr = nfs_setattr,
64c2ce8b
AK		 6910 .getxattr = generic_getxattr,
6911 .setxattr = generic_setxattr,
6912 .listxattr = generic_listxattr,
6913 .removexattr = generic_removexattr,
6b3b5496
BF		 6914};
6915
509de811 6916const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6917 .version = 4, /* protocol version */
6918 .dentry_ops = &nfs4_dentry_operations,
6919 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6920 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6921 .file_ops = &nfs4_file_operations,
1da177e4 6922 .getroot = nfs4_proc_get_root,
281cad46 6923 .submount = nfs4_submount,
ff9099f2 6924 .try_mount = nfs4_try_mount,
1da177e4
LT		 6925 .getattr = nfs4_proc_getattr,
6926 .setattr = nfs4_proc_setattr,
6927 .lookup = nfs4_proc_lookup,
6928 .access = nfs4_proc_access,
6929 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6930 .create = nfs4_proc_create,
6931 .remove = nfs4_proc_remove,
6932 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6933 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6934 .unlink_done = nfs4_proc_unlink_done,
6935 .rename = nfs4_proc_rename,
d3d4152a 6936 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6937 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6938 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6939 .link = nfs4_proc_link,
6940 .symlink = nfs4_proc_symlink,
6941 .mkdir = nfs4_proc_mkdir,
6942 .rmdir = nfs4_proc_remove,
6943 .readdir = nfs4_proc_readdir,
6944 .mknod = nfs4_proc_mknod,
6945 .statfs = nfs4_proc_statfs,
6946 .fsinfo = nfs4_proc_fsinfo,
6947 .pathconf = nfs4_proc_pathconf,
e9326dca 6948 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6949 .decode_dirent = nfs4_decode_dirent,
6950 .read_setup = nfs4_proc_read_setup,
1abb5088 6951 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6952 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6953 .read_done = nfs4_read_done,
1da177e4 6954 .write_setup = nfs4_proc_write_setup,
57208fa7 6955 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6956 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6957 .write_done = nfs4_write_done,
1da177e4 6958 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6959 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6960 .commit_done = nfs4_commit_done,
1da177e4 6961 .lock = nfs4_proc_lock,
e50a1c2e 6962 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6963 .close_context = nfs4_close_context,
2b484297 6964 .open_context = nfs4_atomic_open,
011e2a7f 6965 .have_delegation = nfs4_have_delegation,
57ec14c5 6966 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6967 .alloc_client = nfs4_alloc_client,
45a52a02 6968 .init_client = nfs4_init_client,
cdb7eced 6969 .free_client = nfs4_free_client,
1179acc6
BS		 6970 .create_server = nfs4_create_server,
6971 .clone_server = nfs_clone_server,
1da177e4
LT		 6972};
6973
64c2ce8b
AK		 6974static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6975 .prefix = XATTR_NAME_NFSV4_ACL,
6976 .list = nfs4_xattr_list_nfs4_acl,
6977 .get = nfs4_xattr_get_nfs4_acl,
6978 .set = nfs4_xattr_set_nfs4_acl,
6979};
6980
6981const struct xattr_handler *nfs4_xattr_handlers[] = {
6982 &nfs4_xattr_nfs4_acl_handler,
6983 NULL
6984};
6985
1da177e4
LT		 6986/*
6987 * Local variables:
6988 * c-basic-offset: 8
6989 * End:
6990 */
Linux 6.x block layer and io_uring tree(s)