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NFSv4.1: Clean up nfs4_free_slot
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
6168f62c
WAA		 107 case -NFS4ERR_ACCESS:
108 return -EACCES;
52567b03 109 default:
1da177e4 110 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 111 __func__, -err);
52567b03 112 break;
1da177e4 113 }
52567b03 114 return -EIO;
1da177e4
LT		 115}
116
117/*
118 * This is our standard bitmap for GETATTR requests.
119 */
1549210f 120const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 121 FATTR4_WORD0_TYPE
122 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_SIZE
124 | FATTR4_WORD0_FSID
125 | FATTR4_WORD0_FILEID,
126 FATTR4_WORD1_MODE
127 | FATTR4_WORD1_NUMLINKS
128 | FATTR4_WORD1_OWNER
129 | FATTR4_WORD1_OWNER_GROUP
130 | FATTR4_WORD1_RAWDEV
131 | FATTR4_WORD1_SPACE_USED
132 | FATTR4_WORD1_TIME_ACCESS
133 | FATTR4_WORD1_TIME_METADATA
134 | FATTR4_WORD1_TIME_MODIFY
135};
136
1549210f
TM		 137static const u32 nfs4_pnfs_open_bitmap[3] = {
138 FATTR4_WORD0_TYPE
139 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_SIZE
141 | FATTR4_WORD0_FSID
142 | FATTR4_WORD0_FILEID,
143 FATTR4_WORD1_MODE
144 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER
146 | FATTR4_WORD1_OWNER_GROUP
147 | FATTR4_WORD1_RAWDEV
148 | FATTR4_WORD1_SPACE_USED
149 | FATTR4_WORD1_TIME_ACCESS
150 | FATTR4_WORD1_TIME_METADATA
151 | FATTR4_WORD1_TIME_MODIFY,
152 FATTR4_WORD2_MDSTHRESHOLD
153};
154
e23008ec
AA		 155static const u32 nfs4_open_noattr_bitmap[3] = {
156 FATTR4_WORD0_TYPE
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID,
159};
160
1da177e4
LT		 161const u32 nfs4_statfs_bitmap[2] = {
162 FATTR4_WORD0_FILES_AVAIL
163 | FATTR4_WORD0_FILES_FREE
164 | FATTR4_WORD0_FILES_TOTAL,
165 FATTR4_WORD1_SPACE_AVAIL
166 | FATTR4_WORD1_SPACE_FREE
167 | FATTR4_WORD1_SPACE_TOTAL
168};
169
4ce79717 170const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 171 FATTR4_WORD0_MAXLINK
172 | FATTR4_WORD0_MAXNAME,
173 0
174};
175
dae100c2 176const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 177 | FATTR4_WORD0_MAXREAD
178 | FATTR4_WORD0_MAXWRITE
179 | FATTR4_WORD0_LEASE_TIME,
55b6e774 180 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 181 | FATTR4_WORD1_FS_LAYOUT_TYPES,
182 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 183};
184
830b8e33
MN		 185const u32 nfs4_fs_locations_bitmap[2] = {
186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID
191 | FATTR4_WORD0_FS_LOCATIONS,
192 FATTR4_WORD1_MODE
193 | FATTR4_WORD1_NUMLINKS
194 | FATTR4_WORD1_OWNER
195 | FATTR4_WORD1_OWNER_GROUP
196 | FATTR4_WORD1_RAWDEV
197 | FATTR4_WORD1_SPACE_USED
198 | FATTR4_WORD1_TIME_ACCESS
199 | FATTR4_WORD1_TIME_METADATA
200 | FATTR4_WORD1_TIME_MODIFY
201 | FATTR4_WORD1_MOUNTED_ON_FILEID
202};
203
bc4785cd 204static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 205 struct nfs4_readdir_arg *readdir)
206{
0dbb4c67 207 __be32 *start, *p;
1da177e4 208
1da177e4 209 if (cookie > 2) {
b7ef1956 210 readdir->cookie = cookie;
1da177e4
LT		 211 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
212 return;
213 }
214
215 readdir->cookie = 0;
216 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
217 if (cookie == 2)
218 return;
219
220 /*
221 * NFSv4 servers do not return entries for '.' and '..'
222 * Therefore, we fake these entries here. We let '.'
223 * have cookie 0 and '..' have cookie 1. Note that
224 * when talking to the server, we always send cookie 0
225 * instead of 1 or 2.
226 */
2b86ce2d 227 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 228
229 if (cookie == 0) {
230 *p++ = xdr_one; /* next */
231 *p++ = xdr_zero; /* cookie, first word */
232 *p++ = xdr_one; /* cookie, second word */
233 *p++ = xdr_one; /* entry len */
234 memcpy(p, ".\0\0\0", 4); /* entry */
235 p++;
236 *p++ = xdr_one; /* bitmap length */
237 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
238 *p++ = htonl(8); /* attribute buffer length */
4e769b93 239 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 240 }
241
242 *p++ = xdr_one; /* next */
243 *p++ = xdr_zero; /* cookie, first word */
244 *p++ = xdr_two; /* cookie, second word */
245 *p++ = xdr_two; /* entry len */
246 memcpy(p, "..\0\0", 4); /* entry */
247 p++;
248 *p++ = xdr_one; /* bitmap length */
249 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
250 *p++ = htonl(8); /* attribute buffer length */
4e769b93 251 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 252
253 readdir->pgbase = (char *)p - (char *)start;
254 readdir->count -= readdir->pgbase;
2b86ce2d 255 kunmap_atomic(start);
1da177e4
LT		 256}
257
65de872e
TM		 258static int nfs4_wait_clnt_recover(struct nfs_client *clp)
259{
260 int res;
261
262 might_sleep();
263
e005e804 264 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 265 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 266 if (res)
267 return res;
268
269 if (clp->cl_cons_state < 0)
270 return clp->cl_cons_state;
271 return 0;
65de872e
TM		 272}
273
274static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
275{
276 int res = 0;
277
278 might_sleep();
279
280 if (*timeout <= 0)
281 *timeout = NFS4_POLL_RETRY_MIN;
282 if (*timeout > NFS4_POLL_RETRY_MAX)
283 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 284 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 285 if (fatal_signal_pending(current))
286 res = -ERESTARTSYS;
287 *timeout <<= 1;
288 return res;
289}
290
291/* This is the error handling routine for processes that are allowed
292 * to sleep.
293 */
b064eca2 294static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 295{
296 struct nfs_client *clp = server->nfs_client;
9e33bed5 297 struct nfs4_state *state = exception->state;
3114ea7a 298 struct inode *inode = exception->inode;
65de872e
TM		 299 int ret = errorcode;
300
301 exception->retry = 0;
302 switch(errorcode) {
303 case 0:
304 return 0;
3114ea7a 305 case -NFS4ERR_OPENMODE:
011e2a7f 306 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 307 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 308 exception->retry = 1;
309 return 0;
310 }
311 if (state == NULL)
312 break;
313 nfs4_schedule_stateid_recovery(server, state);
314 goto wait_on_recovery;
a1d0b5ee 315 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 316 case -NFS4ERR_ADMIN_REVOKED:
317 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 318 if (state == NULL)
319 break;
14977489 320 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 321 nfs4_schedule_stateid_recovery(server, state);
322 goto wait_on_recovery;
0ced63d1
TM		 323 case -NFS4ERR_EXPIRED:
324 if (state != NULL)
325 nfs4_schedule_stateid_recovery(server, state);
65de872e 326 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 327 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 328 nfs4_schedule_lease_recovery(clp);
329 goto wait_on_recovery;
03391693 330#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 331 case -NFS4ERR_BADSESSION:
332 case -NFS4ERR_BADSLOT:
333 case -NFS4ERR_BAD_HIGH_SLOT:
334 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
335 case -NFS4ERR_DEADSESSION:
336 case -NFS4ERR_SEQ_FALSE_RETRY:
337 case -NFS4ERR_SEQ_MISORDERED:
338 dprintk("%s ERROR: %d Reset session\n", __func__,
339 errorcode);
9f594791 340 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 341 goto wait_on_recovery;
03391693 342#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 343 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 344 if (exception->timeout > HZ) {
345 /* We have retried a decent amount, time to
346 * fail
347 */
348 ret = -EBUSY;
349 break;
350 }
65de872e
TM		 351 case -NFS4ERR_GRACE:
352 case -NFS4ERR_DELAY:
2c643488 353 case -EKEYEXPIRED:
65de872e
TM		 354 ret = nfs4_delay(server->client, &exception->timeout);
355 if (ret != 0)
356 break;
a8a4ae3a 357 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 358 case -NFS4ERR_OLD_STATEID:
359 exception->retry = 1;
b064eca2
TM		 360 break;
361 case -NFS4ERR_BADOWNER:
362 /* The following works around a Linux server bug! */
363 case -NFS4ERR_BADNAME:
364 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
365 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
366 exception->retry = 1;
367 printk(KERN_WARNING "NFS: v4 server %s "
368 "does not accept raw "
369 "uid/gids. "
370 "Reenabling the idmapper.\n",
371 server->nfs_client->cl_hostname);
372 }
65de872e
TM		 373 }
374 /* We failed to handle the error */
375 return nfs4_map_errors(ret);
0400a6b0 376wait_on_recovery:
a2c0b9e2
TM		 377 ret = nfs4_wait_clnt_recover(clp);
378 if (ret == 0)
379 exception->retry = 1;
380 return ret;
65de872e
TM		 381}
382
383
452e9352 384static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 385{
1da177e4
LT		 386 spin_lock(&clp->cl_lock);
387 if (time_before(clp->cl_last_renewal,timestamp))
388 clp->cl_last_renewal = timestamp;
389 spin_unlock(&clp->cl_lock);
390}
391
452e9352
TM		 392static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
393{
394 do_renew_lease(server->nfs_client, timestamp);
395}
396
cccef3b9
AA		 397#if defined(CONFIG_NFS_V4_1)
398
e2c4ab3c
AA		 399/*
400 * nfs4_free_slot - free a slot and efficiently update slot table.
401 *
402 * freeing a slot is trivially done by clearing its respective bit
403 * in the bitmap.
404 * If the freed slotid equals highest_used_slotid we want to update it
405 * so that the server would be able to size down the slot table if needed,
406 * otherwise we know that the highest_used_slotid is still in use.
407 * When updating highest_used_slotid there may be "holes" in the bitmap
408 * so we need to scan down from highest_used_slotid to 0 looking for the now
409 * highest slotid in use.
45d43c29 410 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 411 *
412 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 413 */
414static void
f4af6e2a 415nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *slot)
e2c4ab3c 416{
f4af6e2a
TM		 417 u32 slotid = slot->slot_nr;
418
e2c4ab3c
AA		 419 /* clear used bit in bitmap */
420 __clear_bit(slotid, tbl->used_slots);
421
422 /* update highest_used_slotid when it is freed */
423 if (slotid == tbl->highest_used_slotid) {
f4af6e2a
TM		 424 u32 new_max = find_last_bit(tbl->used_slots, slotid);
425 if (new_max < slotid)
426 tbl->highest_used_slotid = new_max;
e2c4ab3c 427 else
45d43c29 428 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 429 }
45d43c29
TM		 430 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
431 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 432}
433
961a828d
TM		 434bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
435{
436 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
437 return true;
e2c4ab3c
AA		 438}
439
3bfb0fc5 440/*
42acd021 441 * Signal state manager thread if session fore channel is drained
3bfb0fc5 442 */
42acd021 443static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 444{
a2118c33 445 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 446 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
447 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 448 return;
449 }
450
45d43c29 451 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 452 return;
453
42acd021
AA		 454 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
455 complete(&ses->fc_slot_table.complete);
456}
457
458/*
459 * Signal state manager thread if session back channel is drained
460 */
461void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
462{
463 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 464 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 465 return;
466 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
467 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 468}
469
d185a334 470static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 471{
e3725ec0 472 struct nfs4_session *session;
13615871
AA		 473 struct nfs4_slot_table *tbl;
474
dfb4f309 475 if (!res->sr_slot) {
13615871
AA		 476 /* just wake up the next guy waiting since
477 * we may have not consumed a slot after all */
691daf3b 478 dprintk("%s: No slot\n", __func__);
35dc1d74 479 return;
13615871 480 }
e3725ec0
TM		 481 tbl = res->sr_slot->table;
482 session = tbl->session;
ea028ac9 483
35dc1d74 484 spin_lock(&tbl->slot_tbl_lock);
f4af6e2a 485 nfs4_free_slot(tbl, res->sr_slot);
e3725ec0 486 nfs4_check_drain_fc_complete(session);
35dc1d74 487 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 488 res->sr_slot = NULL;
13615871
AA		 489}
490
14516c3a 491static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 492{
e3725ec0 493 struct nfs4_session *session;
933602e3 494 struct nfs4_slot *slot;
b0df806c 495 unsigned long timestamp;
14516c3a 496 struct nfs_client *clp;
b0df806c
AA		 497
498 /*
499 * sr_status remains 1 if an RPC level error occurred. The server
500 * may or may not have processed the sequence operation..
501 * Proceed as if the server received and processed the sequence
502 * operation.
503 */
504 if (res->sr_status == 1)
505 res->sr_status = NFS_OK;
506
468f8613
BS		 507 /* don't increment the sequence number if the task wasn't sent */
508 if (!RPC_WAS_SENT(task))
b0df806c
AA		 509 goto out;
510
933602e3 511 slot = res->sr_slot;
e3725ec0 512 session = slot->table->session;
933602e3 513
691daf3b 514 /* Check the SEQUENCE operation status */
14516c3a
TM		 515 switch (res->sr_status) {
516 case 0:
b0df806c 517 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 518 ++slot->seq_nr;
519 timestamp = slot->renewal_time;
e3725ec0 520 clp = session->clp;
452e9352 521 do_renew_lease(clp, timestamp);
0629e370 522 /* Check sequence flags */
b4410c2f
TM		 523 if (res->sr_status_flags != 0)
524 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 525 break;
526 case -NFS4ERR_DELAY:
527 /* The server detected a resend of the RPC call and
528 * returned NFS4ERR_DELAY as per Section 2.10.6.2
529 * of RFC5661.
530 */
df2fabff 531 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 532 __func__,
df2fabff 533 slot->slot_nr,
933602e3 534 slot->seq_nr);
14516c3a
TM		 535 goto out_retry;
536 default:
537 /* Just update the slot sequence no. */
933602e3 538 ++slot->seq_nr;
b0df806c
AA		 539 }
540out:
541 /* The session may be reset by one of the error handlers. */
542 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 543 nfs41_sequence_free_slot(res);
14516c3a
TM		 544 return 1;
545out_retry:
d05dd4e9 546 if (!rpc_restart_call(task))
14516c3a
TM		 547 goto out;
548 rpc_delay(task, NFS4_POLL_RETRY_MAX);
549 return 0;
b0df806c
AA		 550}
551
14516c3a
TM		 552static int nfs4_sequence_done(struct rpc_task *task,
553 struct nfs4_sequence_res *res)
df896455 554{
e3725ec0 555 if (res->sr_slot == NULL)
14516c3a
TM		 556 return 1;
557 return nfs41_sequence_done(task, res);
df896455
TM		 558}
559
510b8175 560/*
2dc03b7f 561 * nfs4_alloc_slot - efficiently look for a free slot
510b8175 562 *
2dc03b7f 563 * nfs4_alloc_slot looks for an unset bit in the used_slots bitmap.
510b8175
BH		 564 * If found, we mark the slot as used, update the highest_used_slotid,
565 * and respectively set up the sequence operation args.
fbcd4abc
AA		 566 *
567 * Note: must be called with under the slot_tbl_lock.
510b8175 568 */
2dc03b7f 569static struct nfs4_slot *nfs4_alloc_slot(struct nfs4_slot_table *tbl)
510b8175 570{
2dc03b7f 571 struct nfs4_slot *ret = NULL;
45d43c29 572 u32 slotid;
510b8175 573
45d43c29 574 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 575 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
576 tbl->max_slots);
577 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
578 if (slotid >= tbl->max_slots)
579 goto out;
580 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 581 if (slotid > tbl->highest_used_slotid ||
582 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175 583 tbl->highest_used_slotid = slotid;
2dc03b7f
TM		 584 ret = &tbl->slots[slotid];
585 ret->renewal_time = jiffies;
586
510b8175
BH		 587out:
588 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
2dc03b7f
TM		 589 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
590 ret ? ret->slot_nr : -1);
591 return ret;
510b8175
BH		 592}
593
9d12b216
TM		 594static void nfs41_init_sequence(struct nfs4_sequence_args *args,
595 struct nfs4_sequence_res *res, int cache_reply)
596{
2b2fa717 597 args->sa_slot = NULL;
9d12b216
TM		 598 args->sa_cache_this = 0;
599 if (cache_reply)
600 args->sa_cache_this = 1;
9d12b216
TM		 601 res->sr_slot = NULL;
602}
603
dc70d7b3 604int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 605 struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res,
ce5039c1
AA		 607 struct rpc_task *task)
608{
fbcd4abc
AA		 609 struct nfs4_slot *slot;
610 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 611
612 dprintk("--> %s\n", __func__);
ce5039c1 613 /* slot already allocated? */
dfb4f309 614 if (res->sr_slot != NULL)
ce5039c1
AA		 615 return 0;
616
fbcd4abc
AA		 617 tbl = &session->fc_slot_table;
618
619 spin_lock(&tbl->slot_tbl_lock);
a2118c33 620 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 621 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 622 /* The state manager will wait until the slot table is empty */
05f0d236 623 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 624 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 625 dprintk("%s session is draining\n", __func__);
05f0d236 626 return -EAGAIN;
b069d94a
AA		 627 }
628
689cf5c1
AB		 629 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
630 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
631 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
632 spin_unlock(&tbl->slot_tbl_lock);
633 dprintk("%s enforce FIFO order\n", __func__);
634 return -EAGAIN;
635 }
636
2dc03b7f
TM		 637 slot = nfs4_alloc_slot(tbl);
638 if (slot == NULL) {
fbcd4abc
AA		 639 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
640 spin_unlock(&tbl->slot_tbl_lock);
641 dprintk("<-- %s: no free slots\n", __func__);
642 return -EAGAIN;
643 }
644 spin_unlock(&tbl->slot_tbl_lock);
645
689cf5c1 646 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
2b2fa717
TM		 647
648 args->sa_slot = slot;
fbcd4abc 649
2dc03b7f
TM		 650 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
651 slot->slot_nr, slot->seq_nr);
fbcd4abc 652
dfb4f309 653 res->sr_slot = slot;
2a6e26cd 654 res->sr_status_flags = 0;
fbcd4abc
AA		 655 /*
656 * sr_status is only set in decode_sequence, and so will remain
657 * set to 1 if an rpc level failure occurs.
658 */
659 res->sr_status = 1;
ce5039c1
AA		 660 return 0;
661}
dc70d7b3 662EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 663
035168ab 664int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 665 struct nfs4_sequence_args *args,
666 struct nfs4_sequence_res *res,
ce5039c1
AA		 667 struct rpc_task *task)
668{
035168ab 669 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 670 int ret = 0;
671
9d12b216 672 if (session == NULL)
035168ab 673 goto out;
035168ab 674
df2fabff 675 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 676 __func__, session->clp, session, res->sr_slot ?
df2fabff 677 res->sr_slot->slot_nr : -1);
ce5039c1 678
9d12b216 679 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 680out:
681 dprintk("<-- %s status=%d\n", __func__, ret);
682 return ret;
683}
684
685struct nfs41_call_sync_data {
035168ab 686 const struct nfs_server *seq_server;
ce5039c1
AA		 687 struct nfs4_sequence_args *seq_args;
688 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 689};
690
691static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
692{
693 struct nfs41_call_sync_data *data = calldata;
694
035168ab
TM		 695 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
696
697 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 698 data->seq_res, task))
ce5039c1
AA		 699 return;
700 rpc_call_start(task);
701}
702
b257957e
AB		 703static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
704{
705 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
706 nfs41_call_sync_prepare(task, calldata);
707}
708
69ab40c4
AA		 709static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
710{
711 struct nfs41_call_sync_data *data = calldata;
712
14516c3a 713 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 714}
715
17280175 716static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 717 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 718 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 719};
720
17280175 721static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 722 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
723 .rpc_call_done = nfs41_call_sync_done,
724};
725
7c513058
BS		 726static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
727 struct nfs_server *server,
ce5039c1
AA		 728 struct rpc_message *msg,
729 struct nfs4_sequence_args *args,
730 struct nfs4_sequence_res *res,
b257957e 731 int privileged)
ce5039c1
AA		 732{
733 int ret;
734 struct rpc_task *task;
735 struct nfs41_call_sync_data data = {
035168ab 736 .seq_server = server,
ce5039c1
AA		 737 .seq_args = args,
738 .seq_res = res,
ce5039c1
AA		 739 };
740 struct rpc_task_setup task_setup = {
7c513058 741 .rpc_client = clnt,
ce5039c1
AA		 742 .rpc_message = msg,
743 .callback_ops = &nfs41_call_sync_ops,
744 .callback_data = &data
745 };
746
b257957e
AB		 747 if (privileged)
748 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 749 task = rpc_run_task(&task_setup);
750 if (IS_ERR(task))
751 ret = PTR_ERR(task);
752 else {
753 ret = task->tk_status;
754 rpc_put_task(task);
755 }
756 return ret;
757}
758
7c513058
BS		 759int _nfs4_call_sync_session(struct rpc_clnt *clnt,
760 struct nfs_server *server,
cccef3b9
AA		 761 struct rpc_message *msg,
762 struct nfs4_sequence_args *args,
763 struct nfs4_sequence_res *res,
764 int cache_reply)
765{
9d12b216
TM		 766 nfs41_init_sequence(args, res, cache_reply);
767 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 768}
769
df896455 770#else
9d12b216
TM		 771static inline
772void nfs41_init_sequence(struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res, int cache_reply)
774{
775}
776
14516c3a
TM		 777static int nfs4_sequence_done(struct rpc_task *task,
778 struct nfs4_sequence_res *res)
df896455 779{
14516c3a 780 return 1;
df896455 781}
cccef3b9
AA		 782#endif /* CONFIG_NFS_V4_1 */
783
7c513058
BS		 784int _nfs4_call_sync(struct rpc_clnt *clnt,
785 struct nfs_server *server,
cccef3b9
AA		 786 struct rpc_message *msg,
787 struct nfs4_sequence_args *args,
788 struct nfs4_sequence_res *res,
789 int cache_reply)
790{
9d12b216 791 nfs41_init_sequence(args, res, cache_reply);
7c513058 792 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 793}
794
e73b83f2 795static inline
7c513058
BS		 796int nfs4_call_sync(struct rpc_clnt *clnt,
797 struct nfs_server *server,
e73b83f2
BS		 798 struct rpc_message *msg,
799 struct nfs4_sequence_args *args,
800 struct nfs4_sequence_res *res,
801 int cache_reply)
802{
7c513058
BS		 803 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
804 args, res, cache_reply);
e73b83f2 805}
cccef3b9 806
38478b24 807static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 808{
38478b24 809 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 810
38478b24 811 spin_lock(&dir->i_lock);
359d7d1c 812 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 813 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 814 nfs_force_lookup_revalidate(dir);
a9a4a87a 815 dir->i_version = cinfo->after;
38478b24 816 spin_unlock(&dir->i_lock);
1da177e4
LT		 817}
818
e56e0b78 819struct nfs4_opendata {
c6d00e63 820 struct kref kref;
e56e0b78
TM		 821 struct nfs_openargs o_arg;
822 struct nfs_openres o_res;
cdd4e68b
TM		 823 struct nfs_open_confirmargs c_arg;
824 struct nfs_open_confirmres c_res;
6926afd1
TM		 825 struct nfs4_string owner_name;
826 struct nfs4_string group_name;
e56e0b78 827 struct nfs_fattr f_attr;
e56e0b78 828 struct dentry *dir;
82a2c1b7 829 struct dentry *dentry;
e56e0b78 830 struct nfs4_state_owner *owner;
aac00a8d 831 struct nfs4_state *state;
e56e0b78 832 struct iattr attrs;
26e976a8 833 unsigned long timestamp;
3e309914 834 unsigned int rpc_done : 1;
24ac23ab
TM		 835 int rpc_status;
836 int cancelled;
e56e0b78
TM		 837};
838
2ced46c2
TM		 839
840static void nfs4_init_opendata_res(struct nfs4_opendata *p)
841{
842 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 843 p->o_res.seqid = p->o_arg.seqid;
844 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 845 p->o_res.server = p->o_arg.server;
5f657530 846 p->o_res.access_request = p->o_arg.access;
2ced46c2 847 nfs_fattr_init(&p->f_attr);
6926afd1 848 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 849}
850
82a2c1b7 851static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 852 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 853 const struct iattr *attrs,
854 gfp_t gfp_mask)
e56e0b78 855{
82a2c1b7 856 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 857 struct inode *dir = parent->d_inode;
858 struct nfs_server *server = NFS_SERVER(dir);
859 struct nfs4_opendata *p;
860
8535b2be 861 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 862 if (p == NULL)
863 goto err;
8535b2be 864 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 865 if (p->o_arg.seqid == NULL)
866 goto err_free;
82a2c1b7
AV		 867 nfs_sb_active(dentry->d_sb);
868 p->dentry = dget(dentry);
e56e0b78
TM		 869 p->dir = parent;
870 p->owner = sp;
871 atomic_inc(&sp->so_count);
872 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 873 p->o_arg.open_flags = flags;
874 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 875 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
876 * will return permission denied for all bits until close */
877 if (!(flags & O_EXCL)) {
878 /* ask server to check for all possible rights as results
879 * are cached */
880 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
881 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 882 }
7539bbab 883 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 884 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
885 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 886 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 887 p->o_arg.server = server;
888 p->o_arg.bitmask = server->attr_bitmask;
1549210f 889 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 890 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 891 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 892 __be32 verf[2];
d77d76ff 893
e56e0b78
TM		 894 p->o_arg.u.attrs = &p->attrs;
895 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 896
897 verf[0] = jiffies;
898 verf[1] = current->pid;
899 memcpy(p->o_arg.u.verifier.data, verf,
900 sizeof(p->o_arg.u.verifier.data));
e56e0b78 901 }
cdd4e68b
TM		 902 p->c_arg.fh = &p->o_res.fh;
903 p->c_arg.stateid = &p->o_res.stateid;
904 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 905 nfs4_init_opendata_res(p);
c6d00e63 906 kref_init(&p->kref);
e56e0b78
TM		 907 return p;
908err_free:
909 kfree(p);
910err:
911 dput(parent);
912 return NULL;
913}
914
c6d00e63 915static void nfs4_opendata_free(struct kref *kref)
e56e0b78 916{
c6d00e63
TM		 917 struct nfs4_opendata *p = container_of(kref,
918 struct nfs4_opendata, kref);
82a2c1b7 919 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 920
921 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 922 if (p->state != NULL)
923 nfs4_put_open_state(p->state);
c6d00e63
TM		 924 nfs4_put_state_owner(p->owner);
925 dput(p->dir);
82a2c1b7
AV		 926 dput(p->dentry);
927 nfs_sb_deactive(sb);
6926afd1 928 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 929 kfree(p);
930}
931
932static void nfs4_opendata_put(struct nfs4_opendata *p)
933{
934 if (p != NULL)
935 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 936}
937
06f814a3
TM		 938static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
939{
06f814a3
TM		 940 int ret;
941
06f814a3 942 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 943 return ret;
944}
945
dc0b027d 946static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 947{
948 int ret = 0;
dc0b027d 949
536e43d1 950 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 951 goto out;
952 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 953 case FMODE_READ:
88069f77
TM		 954 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
955 && state->n_rdonly != 0;
6ee41268
TM		 956 break;
957 case FMODE_WRITE:
88069f77
TM		 958 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
959 && state->n_wronly != 0;
6ee41268
TM		 960 break;
961 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 962 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
963 && state->n_rdwr != 0;
6ee41268 964 }
dc0b027d 965out:
6ee41268
TM		 966 return ret;
967}
968
dc0b027d 969static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 970{
652f89f6
TM		 971 if (delegation == NULL)
972 return 0;
dc0b027d 973 if ((delegation->type & fmode) != fmode)
aac00a8d 974 return 0;
15c831bf 975 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 976 return 0;
b7391f44 977 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 978 return 1;
979}
980
dc0b027d 981static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 982{
dc0b027d 983 switch (fmode) {
e7616923
TM		 984 case FMODE_WRITE:
985 state->n_wronly++;
986 break;
987 case FMODE_READ:
988 state->n_rdonly++;
989 break;
990 case FMODE_READ|FMODE_WRITE:
991 state->n_rdwr++;
992 }
dc0b027d 993 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 994}
995
dc0b027d 996static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 997{
998 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 999 nfs4_stateid_copy(&state->stateid, stateid);
1000 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 1001 switch (fmode) {
003707c7
TM		 1002 case FMODE_READ:
1003 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1004 break;
1005 case FMODE_WRITE:
1006 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1007 break;
1008 case FMODE_READ|FMODE_WRITE:
1009 set_bit(NFS_O_RDWR_STATE, &state->flags);
1010 }
e7616923
TM		 1011}
1012
dc0b027d 1013static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1014{
8bda4e4c 1015 write_seqlock(&state->seqlock);
dc0b027d 1016 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1017 write_sequnlock(&state->seqlock);
003707c7
TM		 1018}
1019
dc0b027d 1020static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1021{
8bda4e4c
TM		 1022 /*
1023 * Protect the call to nfs4_state_set_mode_locked and
1024 * serialise the stateid update
1025 */
1026 write_seqlock(&state->seqlock);
003707c7 1027 if (deleg_stateid != NULL) {
f597c537 1028 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1029 set_bit(NFS_DELEGATED_STATE, &state->flags);
1030 }
1031 if (open_stateid != NULL)
dc0b027d 1032 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1033 write_sequnlock(&state->seqlock);
1034 spin_lock(&state->owner->so_lock);
dc0b027d 1035 update_open_stateflags(state, fmode);
ec073428 1036 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1037}
1038
dc0b027d 1039static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1040{
1041 struct nfs_inode *nfsi = NFS_I(state->inode);
1042 struct nfs_delegation *deleg_cur;
1043 int ret = 0;
1044
dc0b027d 1045 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1046
1047 rcu_read_lock();
1048 deleg_cur = rcu_dereference(nfsi->delegation);
1049 if (deleg_cur == NULL)
1050 goto no_delegation;
1051
1052 spin_lock(&deleg_cur->lock);
1053 if (nfsi->delegation != deleg_cur ||
dc0b027d 1054 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1055 goto no_delegation_unlock;
1056
1057 if (delegation == NULL)
1058 delegation = &deleg_cur->stateid;
f597c537 1059 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1060 goto no_delegation_unlock;
1061
b7391f44 1062 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1063 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1064 ret = 1;
1065no_delegation_unlock:
1066 spin_unlock(&deleg_cur->lock);
1067no_delegation:
1068 rcu_read_unlock();
1069
1070 if (!ret && open_stateid != NULL) {
dc0b027d 1071 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1072 ret = 1;
1073 }
1074
1075 return ret;
1076}
1077
1078
dc0b027d 1079static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1080{
1081 struct nfs_delegation *delegation;
1082
1083 rcu_read_lock();
1084 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1085 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1086 rcu_read_unlock();
1087 return;
1088 }
1089 rcu_read_unlock();
57ec14c5 1090 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1091}
1092
6ee41268 1093static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1094{
1095 struct nfs4_state *state = opendata->state;
1096 struct nfs_inode *nfsi = NFS_I(state->inode);
1097 struct nfs_delegation *delegation;
536e43d1 1098 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1099 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1100 nfs4_stateid stateid;
1101 int ret = -EAGAIN;
1102
aac00a8d 1103 for (;;) {
dc0b027d 1104 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1105 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1106 if (can_open_cached(state, fmode, open_mode)) {
1107 update_open_stateflags(state, fmode);
6ee41268 1108 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1109 goto out_return_state;
1110 }
1111 spin_unlock(&state->owner->so_lock);
1112 }
34310430
TM		 1113 rcu_read_lock();
1114 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1115 if (!can_open_delegated(delegation, fmode)) {
34310430 1116 rcu_read_unlock();
aac00a8d 1117 break;
34310430 1118 }
aac00a8d 1119 /* Save the delegation */
f597c537 1120 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1121 rcu_read_unlock();
af22f94a 1122 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1123 if (ret != 0)
1124 goto out;
1125 ret = -EAGAIN;
34310430
TM		 1126
1127 /* Try to update the stateid using the delegation */
dc0b027d 1128 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1129 goto out_return_state;
aac00a8d 1130 }
aac00a8d
TM		 1131out:
1132 return ERR_PTR(ret);
1133out_return_state:
1134 atomic_inc(&state->count);
1135 return state;
1136}
1137
e23008ec
AA		 1138static void
1139nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1140{
1141 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1142 struct nfs_delegation *delegation;
1143 int delegation_flags = 0;
1144
1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1147 if (delegation)
1148 delegation_flags = delegation->flags;
1149 rcu_read_unlock();
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",
1154 clp->cl_hostname);
1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
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}
1164
1165/*
1166 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1167 * and update the nfs4_state.
1168 */
1169static struct nfs4_state *
1170_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1171{
1172 struct inode *inode = data->state->inode;
1173 struct nfs4_state *state = data->state;
1174 int ret;
1175
1176 if (!data->rpc_done) {
1177 ret = data->rpc_status;
1178 goto err;
1179 }
1180
1181 ret = -ESTALE;
1182 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1183 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1184 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1185 goto err;
1186
1187 ret = -ENOMEM;
1188 state = nfs4_get_open_state(inode, data->owner);
1189 if (state == NULL)
1190 goto err;
1191
1192 ret = nfs_refresh_inode(inode, &data->f_attr);
1193 if (ret)
1194 goto err;
1195
1196 if (data->o_res.delegation_type != 0)
1197 nfs4_opendata_check_deleg(data, state);
1198 update_open_stateid(state, &data->o_res.stateid, NULL,
1199 data->o_arg.fmode);
1200
1201 return state;
1202err:
1203 return ERR_PTR(ret);
1204
1205}
1206
1207static struct nfs4_state *
1208_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1209{
1210 struct inode *inode;
1211 struct nfs4_state *state = NULL;
1b370bc2 1212 int ret;
24ac23ab 1213
aac00a8d 1214 if (!data->rpc_done) {
6ee41268 1215 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1216 goto out;
1217 }
1218
1b370bc2 1219 ret = -EAGAIN;
24ac23ab 1220 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1221 goto err;
24ac23ab 1222 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1223 ret = PTR_ERR(inode);
03f28e3a 1224 if (IS_ERR(inode))
1b370bc2
TM		 1225 goto err;
1226 ret = -ENOMEM;
24ac23ab
TM		 1227 state = nfs4_get_open_state(inode, data->owner);
1228 if (state == NULL)
1b370bc2 1229 goto err_put_inode;
e23008ec
AA		 1230 if (data->o_res.delegation_type != 0)
1231 nfs4_opendata_check_deleg(data, state);
34310430 1232 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1233 data->o_arg.fmode);
24ac23ab 1234 iput(inode);
aac00a8d 1235out:
24ac23ab 1236 return state;
1b370bc2
TM		 1237err_put_inode:
1238 iput(inode);
1239err:
1240 return ERR_PTR(ret);
24ac23ab
TM		 1241}
1242
e23008ec
AA		 1243static struct nfs4_state *
1244nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1245{
1246 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1247 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1248 return _nfs4_opendata_to_nfs4_state(data);
1249}
1250
864472e9
TM		 1251static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1252{
1253 struct nfs_inode *nfsi = NFS_I(state->inode);
1254 struct nfs_open_context *ctx;
1255
1256 spin_lock(&state->inode->i_lock);
1257 list_for_each_entry(ctx, &nfsi->open_files, list) {
1258 if (ctx->state != state)
1259 continue;
1260 get_nfs_open_context(ctx);
1261 spin_unlock(&state->inode->i_lock);
1262 return ctx;
1263 }
1264 spin_unlock(&state->inode->i_lock);
1265 return ERR_PTR(-ENOENT);
1266}
1267
6f220ed5
TM		 1268static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1269{
1270 struct nfs4_opendata *opendata;
1271
3d4ff43d 1272 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1273 if (opendata == NULL)
1274 return ERR_PTR(-ENOMEM);
1275 opendata->state = state;
1276 atomic_inc(&state->count);
1277 return opendata;
1278}
1279
dc0b027d 1280static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1281{
2ced46c2 1282 struct nfs4_state *newstate;
864472e9
TM		 1283 int ret;
1284
dc0b027d
TM		 1285 opendata->o_arg.open_flags = 0;
1286 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1287 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1288 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1289 nfs4_init_opendata_res(opendata);
b257957e 1290 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1291 if (ret != 0)
1292 return ret;
2ced46c2 1293 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1294 if (IS_ERR(newstate))
1295 return PTR_ERR(newstate);
643168c2 1296 nfs4_close_state(newstate, fmode);
2ced46c2 1297 *res = newstate;
864472e9
TM		 1298 return 0;
1299}
1300
1301static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1302{
864472e9 1303 struct nfs4_state *newstate;
864472e9
TM		 1304 int ret;
1305
1306 /* memory barrier prior to reading state->n_* */
2ced46c2 1307 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1308 smp_rmb();
1309 if (state->n_rdwr != 0) {
b0ed9dbc 1310 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1311 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1312 if (ret != 0)
1313 return ret;
2ced46c2
TM		 1314 if (newstate != state)
1315 return -ESTALE;
864472e9
TM		 1316 }
1317 if (state->n_wronly != 0) {
b0ed9dbc 1318 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1319 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1320 if (ret != 0)
1321 return ret;
2ced46c2
TM		 1322 if (newstate != state)
1323 return -ESTALE;
864472e9
TM		 1324 }
1325 if (state->n_rdonly != 0) {
b0ed9dbc 1326 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1327 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1328 if (ret != 0)
1329 return ret;
2ced46c2
TM		 1330 if (newstate != state)
1331 return -ESTALE;
864472e9 1332 }
1ac7e2fd
TM		 1333 /*
1334 * We may have performed cached opens for all three recoveries.
1335 * Check if we need to update the current stateid.
1336 */
1337 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1338 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1339 write_seqlock(&state->seqlock);
1ac7e2fd 1340 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1341 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1342 write_sequnlock(&state->seqlock);
1ac7e2fd 1343 }
864472e9
TM		 1344 return 0;
1345}
1346
1da177e4
LT		 1347/*
1348 * OPEN_RECLAIM:
1349 * reclaim state on the server after a reboot.
1da177e4 1350 */
539cd03a 1351static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1352{
1ac7e2fd 1353 struct nfs_delegation *delegation;
864472e9 1354 struct nfs4_opendata *opendata;
dc0b027d 1355 fmode_t delegation_type = 0;
1da177e4
LT		 1356 int status;
1357
6f220ed5
TM		 1358 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1359 if (IS_ERR(opendata))
1360 return PTR_ERR(opendata);
864472e9
TM		 1361 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1362 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1363 rcu_read_lock();
1364 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1365 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1366 delegation_type = delegation->type;
1ac7e2fd 1367 rcu_read_unlock();
864472e9
TM		 1368 opendata->o_arg.u.delegation_type = delegation_type;
1369 status = nfs4_open_recover(opendata, state);
c6d00e63 1370 nfs4_opendata_put(opendata);
1da177e4
LT		 1371 return status;
1372}
1373
539cd03a 1374static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1375{
1376 struct nfs_server *server = NFS_SERVER(state->inode);
1377 struct nfs4_exception exception = { };
1378 int err;
1379 do {
539cd03a 1380 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1381 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1382 break;
1383 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1384 } while (exception.retry);
1385 return err;
1386}
1387
864472e9
TM		 1388static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1389{
1390 struct nfs_open_context *ctx;
1391 int ret;
1392
1393 ctx = nfs4_state_find_open_context(state);
1394 if (IS_ERR(ctx))
1395 return PTR_ERR(ctx);
539cd03a 1396 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1397 put_nfs_open_context(ctx);
1398 return ret;
1399}
1400
13437e12 1401static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1402{
e56e0b78 1403 struct nfs4_opendata *opendata;
864472e9 1404 int ret;
1da177e4 1405
6f220ed5
TM		 1406 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1407 if (IS_ERR(opendata))
1408 return PTR_ERR(opendata);
e56e0b78 1409 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1410 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1411 ret = nfs4_open_recover(opendata, state);
c6d00e63 1412 nfs4_opendata_put(opendata);
864472e9 1413 return ret;
1da177e4
LT		 1414}
1415
13437e12 1416int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1417{
1418 struct nfs4_exception exception = { };
539cd03a 1419 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1420 int err;
1421 do {
13437e12 1422 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1423 switch (err) {
1424 case 0:
965b5d67
TM		 1425 case -ENOENT:
1426 case -ESTALE:
1427 goto out;
bcfa49f6
RL		 1428 case -NFS4ERR_BADSESSION:
1429 case -NFS4ERR_BADSLOT:
1430 case -NFS4ERR_BAD_HIGH_SLOT:
1431 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1432 case -NFS4ERR_DEADSESSION:
9f594791 1433 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1434 goto out;
1da177e4
LT		 1435 case -NFS4ERR_STALE_CLIENTID:
1436 case -NFS4ERR_STALE_STATEID:
1437 case -NFS4ERR_EXPIRED:
1438 /* Don't recall a delegation if it was lost */
0400a6b0 1439 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1440 goto out;
1441 case -ERESTARTSYS:
1442 /*
1443 * The show must go on: exit, but mark the
1444 * stateid as needing recovery.
1445 */
a1d0b5ee 1446 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1447 case -NFS4ERR_ADMIN_REVOKED:
1448 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1449 nfs_inode_find_state_and_recover(state->inode,
1450 stateid);
0400a6b0 1451 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1452 case -EKEYEXPIRED:
1453 /*
1454 * User RPCSEC_GSS context has expired.
1455 * We cannot recover this stateid now, so
1456 * skip it and allow recovery thread to
1457 * proceed.
1458 */
965b5d67
TM		 1459 case -ENOMEM:
1460 err = 0;
1461 goto out;
1da177e4
LT		 1462 }
1463 err = nfs4_handle_exception(server, err, &exception);
1464 } while (exception.retry);
965b5d67 1465out:
1da177e4
LT		 1466 return err;
1467}
1468
cdd4e68b
TM		 1469static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1470{
1471 struct nfs4_opendata *data = calldata;
1472
1473 data->rpc_status = task->tk_status;
26e976a8 1474 if (data->rpc_status == 0) {
f597c537 1475 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1476 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1477 renew_lease(data->o_res.server, data->timestamp);
3e309914 1478 data->rpc_done = 1;
26e976a8 1479 }
cdd4e68b
TM		 1480}
1481
1482static void nfs4_open_confirm_release(void *calldata)
1483{
1484 struct nfs4_opendata *data = calldata;
1485 struct nfs4_state *state = NULL;
1486
1487 /* If this request hasn't been cancelled, do nothing */
1488 if (data->cancelled == 0)
1489 goto out_free;
1490 /* In case of error, no cleanup! */
3e309914 1491 if (!data->rpc_done)
cdd4e68b 1492 goto out_free;
cdd4e68b 1493 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1494 if (!IS_ERR(state))
643168c2 1495 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1496out_free:
c6d00e63 1497 nfs4_opendata_put(data);
cdd4e68b
TM		 1498}
1499
1500static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1501 .rpc_call_done = nfs4_open_confirm_done,
1502 .rpc_release = nfs4_open_confirm_release,
1503};
1504
1505/*
1506 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1507 */
1508static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1509{
1510 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1511 struct rpc_task *task;
5138fde0
TM		 1512 struct rpc_message msg = {
1513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1514 .rpc_argp = &data->c_arg,
1515 .rpc_resp = &data->c_res,
1516 .rpc_cred = data->owner->so_cred,
1517 };
c970aa85
TM		 1518 struct rpc_task_setup task_setup_data = {
1519 .rpc_client = server->client,
5138fde0 1520 .rpc_message = &msg,
c970aa85
TM		 1521 .callback_ops = &nfs4_open_confirm_ops,
1522 .callback_data = data,
101070ca 1523 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1524 .flags = RPC_TASK_ASYNC,
1525 };
1da177e4
LT		 1526 int status;
1527
c6d00e63 1528 kref_get(&data->kref);
3e309914
TM		 1529 data->rpc_done = 0;
1530 data->rpc_status = 0;
5138fde0 1531 data->timestamp = jiffies;
c970aa85 1532 task = rpc_run_task(&task_setup_data);
7a1218a2 1533 if (IS_ERR(task))
cdd4e68b 1534 return PTR_ERR(task);
cdd4e68b
TM		 1535 status = nfs4_wait_for_completion_rpc_task(task);
1536 if (status != 0) {
1537 data->cancelled = 1;
1538 smp_wmb();
1539 } else
1540 status = data->rpc_status;
e6b3c4db 1541 rpc_put_task(task);
1da177e4
LT		 1542 return status;
1543}
1544
24ac23ab 1545static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1546{
24ac23ab
TM		 1547 struct nfs4_opendata *data = calldata;
1548 struct nfs4_state_owner *sp = data->owner;
5138fde0 1549
24ac23ab
TM		 1550 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1551 return;
aac00a8d
TM		 1552 /*
1553 * Check if we still need to send an OPEN call, or if we can use
1554 * a delegation instead.
1555 */
1556 if (data->state != NULL) {
1557 struct nfs_delegation *delegation;
1558
dc0b027d 1559 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1560 goto out_no_action;
aac00a8d
TM		 1561 rcu_read_lock();
1562 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1563 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1564 can_open_delegated(delegation, data->o_arg.fmode))
1565 goto unlock_no_action;
aac00a8d
TM		 1566 rcu_read_unlock();
1567 }
95b72eb0 1568 /* Update client id. */
1f0e890d 1569 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1570 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1571 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1572 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1573 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1574 }
26e976a8 1575 data->timestamp = jiffies;
035168ab 1576 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1577 &data->o_arg.seq_args,
2240a9e2
TM		 1578 &data->o_res.seq_res,
1579 task) != 0)
1580 nfs_release_seqid(data->o_arg.seqid);
1581 else
1582 rpc_call_start(task);
6ee41268 1583 return;
652f89f6
TM		 1584unlock_no_action:
1585 rcu_read_unlock();
6ee41268
TM		 1586out_no_action:
1587 task->tk_action = NULL;
1588
24ac23ab 1589}
1da177e4 1590
b257957e
AB		 1591static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1592{
1593 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1594 nfs4_open_prepare(task, calldata);
1595}
1596
24ac23ab
TM		 1597static void nfs4_open_done(struct rpc_task *task, void *calldata)
1598{
1599 struct nfs4_opendata *data = calldata;
1da177e4 1600
24ac23ab 1601 data->rpc_status = task->tk_status;
d898528c 1602
14516c3a
TM		 1603 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1604 return;
d898528c 1605
24ac23ab 1606 if (task->tk_status == 0) {
807d66d8
TM		 1607 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1608 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1609 case S_IFREG:
1610 break;
1611 case S_IFLNK:
24ac23ab 1612 data->rpc_status = -ELOOP;
6f926b5b
TM		 1613 break;
1614 case S_IFDIR:
24ac23ab 1615 data->rpc_status = -EISDIR;
6f926b5b
TM		 1616 break;
1617 default:
24ac23ab 1618 data->rpc_status = -ENOTDIR;
807d66d8 1619 }
6f926b5b 1620 }
26e976a8 1621 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1622 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1623 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1624 }
3e309914 1625 data->rpc_done = 1;
24ac23ab 1626}
6f926b5b 1627
24ac23ab
TM		 1628static void nfs4_open_release(void *calldata)
1629{
1630 struct nfs4_opendata *data = calldata;
1631 struct nfs4_state *state = NULL;
1632
1633 /* If this request hasn't been cancelled, do nothing */
1634 if (data->cancelled == 0)
1635 goto out_free;
1636 /* In case of error, no cleanup! */
3e309914 1637 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1638 goto out_free;
1639 /* In case we need an open_confirm, no cleanup! */
1640 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1641 goto out_free;
24ac23ab 1642 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1643 if (!IS_ERR(state))
643168c2 1644 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1645out_free:
c6d00e63 1646 nfs4_opendata_put(data);
24ac23ab
TM		 1647}
1648
1649static const struct rpc_call_ops nfs4_open_ops = {
1650 .rpc_call_prepare = nfs4_open_prepare,
1651 .rpc_call_done = nfs4_open_done,
1652 .rpc_release = nfs4_open_release,
1653};
1654
b257957e
AB		 1655static const struct rpc_call_ops nfs4_recover_open_ops = {
1656 .rpc_call_prepare = nfs4_recover_open_prepare,
1657 .rpc_call_done = nfs4_open_done,
1658 .rpc_release = nfs4_open_release,
1659};
1660
1661static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1662{
1663 struct inode *dir = data->dir->d_inode;
1664 struct nfs_server *server = NFS_SERVER(dir);
1665 struct nfs_openargs *o_arg = &data->o_arg;
1666 struct nfs_openres *o_res = &data->o_res;
1667 struct rpc_task *task;
5138fde0
TM		 1668 struct rpc_message msg = {
1669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1670 .rpc_argp = o_arg,
1671 .rpc_resp = o_res,
1672 .rpc_cred = data->owner->so_cred,
1673 };
c970aa85
TM		 1674 struct rpc_task_setup task_setup_data = {
1675 .rpc_client = server->client,
5138fde0 1676 .rpc_message = &msg,
c970aa85
TM		 1677 .callback_ops = &nfs4_open_ops,
1678 .callback_data = data,
101070ca 1679 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1680 .flags = RPC_TASK_ASYNC,
1681 };
24ac23ab
TM		 1682 int status;
1683
9d12b216 1684 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1685 kref_get(&data->kref);
3e309914
TM		 1686 data->rpc_done = 0;
1687 data->rpc_status = 0;
2ced46c2 1688 data->cancelled = 0;
b257957e
AB		 1689 if (isrecover)
1690 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1691 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1692 if (IS_ERR(task))
1693 return PTR_ERR(task);
1694 status = nfs4_wait_for_completion_rpc_task(task);
1695 if (status != 0) {
1696 data->cancelled = 1;
1697 smp_wmb();
1698 } else
1699 status = data->rpc_status;
1700 rpc_put_task(task);
1701
1702 return status;
1703}
1704
1705static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1706{
1707 struct inode *dir = data->dir->d_inode;
1708 struct nfs_openres *o_res = &data->o_res;
1709 int status;
1710
1711 status = nfs4_run_open_task(data, 1);
1712 if (status != 0 || !data->rpc_done)
1713 return status;
1714
6926afd1
TM		 1715 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1716
b257957e
AB		 1717 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1718 status = _nfs4_proc_open_confirm(data);
1719 if (status != 0)
1720 return status;
1721 }
1722
1723 return status;
1724}
1725
6168f62c
WAA		 1726static int nfs4_opendata_access(struct rpc_cred *cred,
1727 struct nfs4_opendata *opendata,
1728 struct nfs4_state *state, fmode_t fmode)
1729{
1730 struct nfs_access_entry cache;
1731 u32 mask;
1732
1733 /* access call failed or for some reason the server doesn't
1734 * support any access modes -- defer access call until later */
1735 if (opendata->o_res.access_supported == 0)
1736 return 0;
1737
1738 mask = 0;
bbd3a8ee
WAA		 1739 /* don't check MAY_WRITE - a newly created file may not have
1740 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1741 if (fmode & FMODE_READ)
1742 mask |= MAY_READ;
6168f62c
WAA		 1743 if (fmode & FMODE_EXEC)
1744 mask |= MAY_EXEC;
1745
1746 cache.cred = cred;
1747 cache.jiffies = jiffies;
1748 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1749 nfs_access_add_cache(state->inode, &cache);
1750
bbd3a8ee 1751 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1752 return 0;
1753
1754 /* even though OPEN succeeded, access is denied. Close the file */
1755 nfs4_close_state(state, fmode);
998f40b5 1756 return -EACCES;
6168f62c
WAA		 1757}
1758
b257957e
AB		 1759/*
1760 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1761 */
1762static int _nfs4_proc_open(struct nfs4_opendata *data)
1763{
1764 struct inode *dir = data->dir->d_inode;
1765 struct nfs_server *server = NFS_SERVER(dir);
1766 struct nfs_openargs *o_arg = &data->o_arg;
1767 struct nfs_openres *o_res = &data->o_res;
1768 int status;
1769
1770 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1771 if (!data->rpc_done)
1772 return status;
1773 if (status != 0) {
1774 if (status == -NFS4ERR_BADNAME &&
1775 !(o_arg->open_flags & O_CREAT))
1776 return -ENOENT;
24ac23ab 1777 return status;
08ef7bd3 1778 }
24ac23ab 1779
6926afd1
TM		 1780 nfs_fattr_map_and_free_names(server, &data->f_attr);
1781
90ff0c54 1782 if (o_arg->open_flags & O_CREAT)
56ae19f3 1783 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1784 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1785 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1786 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1787 status = _nfs4_proc_open_confirm(data);
1da177e4 1788 if (status != 0)
24ac23ab 1789 return status;
1da177e4
LT		 1790 }
1791 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1792 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1793 return 0;
1da177e4
LT		 1794}
1795
d83217c1 1796static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1797{
a78cb57a 1798 unsigned int loop;
6b30954e 1799 int ret;
58d9714a 1800
a78cb57a 1801 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1802 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1803 if (ret != 0)
a78cb57a 1804 break;
e598d843
TM		 1805 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1806 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1807 break;
0400a6b0 1808 nfs4_schedule_state_manager(clp);
a78cb57a 1809 ret = -EIO;
6b30954e 1810 }
a78cb57a 1811 return ret;
58d9714a
TM		 1812}
1813
d83217c1
AA		 1814static int nfs4_recover_expired_lease(struct nfs_server *server)
1815{
1816 return nfs4_client_recover_expired_lease(server->nfs_client);
1817}
1818
1da177e4
LT		 1819/*
1820 * OPEN_EXPIRED:
1821 * reclaim state on the server after a network partition.
1822 * Assumes caller holds the appropriate lock
1823 */
539cd03a 1824static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1825{
e56e0b78 1826 struct nfs4_opendata *opendata;
864472e9 1827 int ret;
1da177e4 1828
6f220ed5
TM		 1829 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1830 if (IS_ERR(opendata))
1831 return PTR_ERR(opendata);
864472e9 1832 ret = nfs4_open_recover(opendata, state);
35d05778 1833 if (ret == -ESTALE)
3d4ff43d 1834 d_drop(ctx->dentry);
c6d00e63 1835 nfs4_opendata_put(opendata);
864472e9 1836 return ret;
1da177e4
LT		 1837}
1838
a9ed2e25 1839static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1840{
539cd03a 1841 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1842 struct nfs4_exception exception = { };
1843 int err;
1844
1845 do {
539cd03a 1846 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1847 switch (err) {
1848 default:
1849 goto out;
1850 case -NFS4ERR_GRACE:
1851 case -NFS4ERR_DELAY:
1852 nfs4_handle_exception(server, err, &exception);
1853 err = 0;
1854 }
202b50dc 1855 } while (exception.retry);
a9ed2e25 1856out:
202b50dc
TM		 1857 return err;
1858}
1859
1da177e4
LT		 1860static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1861{
1da177e4 1862 struct nfs_open_context *ctx;
864472e9 1863 int ret;
1da177e4 1864
864472e9
TM		 1865 ctx = nfs4_state_find_open_context(state);
1866 if (IS_ERR(ctx))
1867 return PTR_ERR(ctx);
539cd03a 1868 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1869 put_nfs_open_context(ctx);
1870 return ret;
1da177e4
LT		 1871}
1872
f062eb6c 1873#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1874static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1875{
f062eb6c 1876 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1877 nfs4_stateid *stateid = &state->stateid;
1878 int status;
1879
1880 /* If a state reset has been done, test_stateid is unneeded */
1881 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1882 return;
1883
1884 status = nfs41_test_stateid(server, stateid);
1885 if (status != NFS_OK) {
1886 /* Free the stateid unless the server explicitly
1887 * informs us the stateid is unrecognized. */
1888 if (status != -NFS4ERR_BAD_STATEID)
1889 nfs41_free_stateid(server, stateid);
6938867e 1890 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1891
6938867e
BS		 1892 write_seqlock(&state->seqlock);
1893 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1894 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1895 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1896 }
1897}
1898
1899/**
1900 * nfs41_check_open_stateid - possibly free an open stateid
1901 *
1902 * @state: NFSv4 state for an inode
1903 *
1904 * Returns NFS_OK if recovery for this stateid is now finished.
1905 * Otherwise a negative NFS4ERR value is returned.
1906 */
1907static int nfs41_check_open_stateid(struct nfs4_state *state)
1908{
1909 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1910 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1911 int status;
1912
1913 /* If a state reset has been done, test_stateid is unneeded */
1914 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1915 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1916 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1917 return -NFS4ERR_BAD_STATEID;
1918
1919 status = nfs41_test_stateid(server, stateid);
1920 if (status != NFS_OK) {
1921 /* Free the stateid unless the server explicitly
1922 * informs us the stateid is unrecognized. */
1923 if (status != -NFS4ERR_BAD_STATEID)
1924 nfs41_free_stateid(server, stateid);
1925
1926 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1927 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1928 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1929 }
1930 return status;
1931}
1932
1933static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1934{
eb64cf96 1935 int status;
b01dd1d8 1936
3e60ffdd
CL		 1937 nfs41_clear_delegation_stateid(state);
1938 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1939 if (status != NFS_OK)
1940 status = nfs4_open_expired(sp, state);
1941 return status;
f062eb6c
BS		 1942}
1943#endif
1944
aa53ed54
JL		 1945/*
1946 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1947 * fields corresponding to attributes that were used to store the verifier.
1948 * Make sure we clobber those fields in the later setattr call
1949 */
1950static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1951{
1952 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1953 !(sattr->ia_valid & ATTR_ATIME_SET))
1954 sattr->ia_valid |= ATTR_ATIME;
1955
1956 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1957 !(sattr->ia_valid & ATTR_MTIME_SET))
1958 sattr->ia_valid |= ATTR_MTIME;
1959}
1960
1da177e4 1961/*
24ac23ab 1962 * Returns a referenced nfs4_state
1da177e4 1963 */
82be417a
AA		 1964static int _nfs4_do_open(struct inode *dir,
1965 struct dentry *dentry,
1966 fmode_t fmode,
1967 int flags,
1968 struct iattr *sattr,
1969 struct rpc_cred *cred,
1970 struct nfs4_state **res,
1971 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1972{
1973 struct nfs4_state_owner *sp;
1974 struct nfs4_state *state = NULL;
1975 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1976 struct nfs4_opendata *opendata;
aac00a8d 1977 int status;
1da177e4
LT		 1978
1979 /* Protect against reboot recovery conflicts */
1da177e4 1980 status = -ENOMEM;
d1e284d5
TM		 1981 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1982 if (sp == NULL) {
1da177e4
LT		 1983 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1984 goto out_err;
1985 }
58d9714a
TM		 1986 status = nfs4_recover_expired_lease(server);
1987 if (status != 0)
b4454fe1 1988 goto err_put_state_owner;
82a2c1b7
AV		 1989 if (dentry->d_inode != NULL)
1990 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1991 status = -ENOMEM;
82a2c1b7 1992 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1993 if (opendata == NULL)
95d35cb4 1994 goto err_put_state_owner;
1da177e4 1995
82be417a
AA		 1996 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1997 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1998 if (!opendata->f_attr.mdsthreshold)
1999 goto err_opendata_put;
1549210f 2000 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2001 }
82a2c1b7
AV		 2002 if (dentry->d_inode != NULL)
2003 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2004
24ac23ab 2005 status = _nfs4_proc_open(opendata);
1da177e4 2006 if (status != 0)
c6d00e63 2007 goto err_opendata_put;
1da177e4 2008
24ac23ab 2009 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 2010 status = PTR_ERR(state);
2011 if (IS_ERR(state))
c6d00e63 2012 goto err_opendata_put;
0df5dd4a 2013 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 2014 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 2015
6168f62c
WAA		 2016 status = nfs4_opendata_access(cred, opendata, state, fmode);
2017 if (status != 0)
2018 goto err_opendata_put;
2019
0ab64e0e
TM		 2020 if (opendata->o_arg.open_flags & O_EXCL) {
2021 nfs4_exclusive_attrset(opendata, sattr);
2022
2023 nfs_fattr_init(opendata->o_res.f_attr);
2024 status = nfs4_do_setattr(state->inode, cred,
2025 opendata->o_res.f_attr, sattr,
2026 state);
2027 if (status == 0)
2028 nfs_setattr_update_inode(state->inode, sattr);
2029 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2030 }
82be417a
AA		 2031
2032 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2033 *ctx_th = opendata->f_attr.mdsthreshold;
2034 else
2035 kfree(opendata->f_attr.mdsthreshold);
2036 opendata->f_attr.mdsthreshold = NULL;
2037
c6d00e63 2038 nfs4_opendata_put(opendata);
1da177e4 2039 nfs4_put_state_owner(sp);
1da177e4
LT		 2040 *res = state;
2041 return 0;
c6d00e63 2042err_opendata_put:
82be417a 2043 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2044 nfs4_opendata_put(opendata);
e56e0b78
TM		 2045err_put_state_owner:
2046 nfs4_put_state_owner(sp);
1da177e4 2047out_err:
1da177e4
LT		 2048 *res = NULL;
2049 return status;
2050}
2051
2052
82be417a
AA		 2053static struct nfs4_state *nfs4_do_open(struct inode *dir,
2054 struct dentry *dentry,
2055 fmode_t fmode,
2056 int flags,
2057 struct iattr *sattr,
2058 struct rpc_cred *cred,
2059 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2060{
2061 struct nfs4_exception exception = { };
2062 struct nfs4_state *res;
2063 int status;
2064
6168f62c 2065 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2066 do {
82be417a
AA		 2067 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2068 &res, ctx_th);
1da177e4
LT		 2069 if (status == 0)
2070 break;
2071 /* NOTE: BAD_SEQID means the server and client disagree about the
2072 * book-keeping w.r.t. state-changing operations
2073 * (OPEN/CLOSE/LOCK/LOCKU...)
2074 * It is actually a sign of a bug on the client or on the server.
2075 *
2076 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2077 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2078 * have unhashed the old state_owner for us, and that we can
2079 * therefore safely retry using a new one. We should still warn
2080 * the user though...
2081 */
2082 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2083 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2084 " returned a bad sequence-id error!\n",
2085 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2086 exception.retry = 1;
2087 continue;
2088 }
550f5747
TM		 2089 /*
2090 * BAD_STATEID on OPEN means that the server cancelled our
2091 * state before it received the OPEN_CONFIRM.
2092 * Recover by retrying the request as per the discussion
2093 * on Page 181 of RFC3530.
2094 */
2095 if (status == -NFS4ERR_BAD_STATEID) {
2096 exception.retry = 1;
2097 continue;
2098 }
aac00a8d
TM		 2099 if (status == -EAGAIN) {
2100 /* We must have found a delegation */
2101 exception.retry = 1;
2102 continue;
2103 }
1da177e4
LT		 2104 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2105 status, &exception));
2106 } while (exception.retry);
2107 return res;
2108}
2109
659bfcd6
TM		 2110static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2111 struct nfs_fattr *fattr, struct iattr *sattr,
2112 struct nfs4_state *state)
1da177e4 2113{
3e4f6290 2114 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2115 struct nfs_setattrargs arg = {
3e4f6290 2116 .fh = NFS_FH(inode),
1da177e4
LT		 2117 .iap = sattr,
2118 .server = server,
2119 .bitmask = server->attr_bitmask,
2120 };
2121 struct nfs_setattrres res = {
2122 .fattr = fattr,
2123 .server = server,
2124 };
2125 struct rpc_message msg = {
659bfcd6
TM		 2126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2127 .rpc_argp = &arg,
2128 .rpc_resp = &res,
2129 .rpc_cred = cred,
1da177e4 2130 };
26e976a8 2131 unsigned long timestamp = jiffies;
65e4308d 2132 int status;
1da177e4 2133
0e574af1 2134 nfs_fattr_init(fattr);
1da177e4 2135
4fc8796d 2136 if (state != NULL) {
2a369153
TM		 2137 struct nfs_lockowner lockowner = {
2138 .l_owner = current->files,
2139 .l_pid = current->tgid,
2140 };
4fc8796d 2141 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2142 &lockowner);
4fc8796d
TM		 2143 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2144 FMODE_WRITE)) {
3e4f6290 2145 /* Use that stateid */
08e9eac4 2146 } else
f597c537 2147 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2148
7c513058 2149 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2150 if (status == 0 && state != NULL)
2151 renew_lease(server, timestamp);
65e4308d 2152 return status;
1da177e4
LT		 2153}
2154
659bfcd6
TM		 2155static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2156 struct nfs_fattr *fattr, struct iattr *sattr,
2157 struct nfs4_state *state)
1da177e4 2158{
3e4f6290 2159 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2160 struct nfs4_exception exception = {
2161 .state = state,
3114ea7a 2162 .inode = inode,
a1d0b5ee 2163 };
1da177e4
LT		 2164 int err;
2165 do {
451146be
TM		 2166 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2167 switch (err) {
2168 case -NFS4ERR_OPENMODE:
2169 if (state && !(state->state & FMODE_WRITE)) {
2170 err = -EBADF;
2171 if (sattr->ia_valid & ATTR_OPEN)
2172 err = -EACCES;
2173 goto out;
2174 }
2175 }
2176 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2177 } while (exception.retry);
451146be 2178out:
1da177e4
LT		 2179 return err;
2180}
2181
2182struct nfs4_closedata {
2183 struct inode *inode;
2184 struct nfs4_state *state;
2185 struct nfs_closeargs arg;
2186 struct nfs_closeres res;
516a6af6 2187 struct nfs_fattr fattr;
26e976a8 2188 unsigned long timestamp;
f7e8917a
FI		 2189 bool roc;
2190 u32 roc_barrier;
1da177e4
LT		 2191};
2192
963d8fe5 2193static void nfs4_free_closedata(void *data)
9512135d 2194{
963d8fe5
TM		 2195 struct nfs4_closedata *calldata = data;
2196 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2197 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2198
f7e8917a
FI		 2199 if (calldata->roc)
2200 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2201 nfs4_put_open_state(calldata->state);
2202 nfs_free_seqid(calldata->arg.seqid);
9512135d 2203 nfs4_put_state_owner(sp);
324d003b 2204 nfs_sb_deactive_async(sb);
9512135d
TM		 2205 kfree(calldata);
2206}
2207
88069f77
TM		 2208static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2209 fmode_t fmode)
2210{
2211 spin_lock(&state->owner->so_lock);
2212 if (!(fmode & FMODE_READ))
2213 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2214 if (!(fmode & FMODE_WRITE))
2215 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2216 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2217 spin_unlock(&state->owner->so_lock);
2218}
2219
963d8fe5 2220static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2221{
963d8fe5 2222 struct nfs4_closedata *calldata = data;
1da177e4 2223 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2224 struct nfs_server *server = NFS_SERVER(calldata->inode);
2225
a3ca5651 2226 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2227 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2228 return;
1da177e4
LT		 2229 /* hmm. we are done with the inode, and in the process of freeing
2230 * the state_owner. we keep this around to process errors
2231 */
1da177e4
LT		 2232 switch (task->tk_status) {
2233 case 0:
f7e8917a
FI		 2234 if (calldata->roc)
2235 pnfs_roc_set_barrier(state->inode,
2236 calldata->roc_barrier);
45328c35 2237 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2238 renew_lease(server, calldata->timestamp);
88069f77
TM		 2239 nfs4_close_clear_stateid_flags(state,
2240 calldata->arg.fmode);
1da177e4
LT		 2241 break;
2242 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2243 case -NFS4ERR_OLD_STATEID:
2244 case -NFS4ERR_BAD_STATEID:
1da177e4 2245 case -NFS4ERR_EXPIRED:
dc0b027d 2246 if (calldata->arg.fmode == 0)
9e33bed5 2247 break;
1da177e4 2248 default:
72211dbe
TM		 2249 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2250 rpc_restart_call_prepare(task);
1da177e4 2251 }
72211dbe 2252 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2253 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2254 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2255}
2256
4ce70ada 2257static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2258{
4ce70ada 2259 struct nfs4_closedata *calldata = data;
9512135d 2260 struct nfs4_state *state = calldata->state;
7fdab069 2261 struct inode *inode = calldata->inode;
88069f77 2262 int call_close = 0;
9512135d 2263
a3ca5651 2264 dprintk("%s: begin!\n", __func__);
963d8fe5 2265 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2266 return;
003707c7 2267
88069f77
TM		 2268 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2269 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2270 spin_lock(&state->owner->so_lock);
003707c7 2271 /* Calculate the change in open mode */
e7616923 2272 if (state->n_rdwr == 0) {
003707c7 2273 if (state->n_rdonly == 0) {
88069f77
TM		 2274 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2275 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2276 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2277 }
2278 if (state->n_wronly == 0) {
88069f77
TM		 2279 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2280 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2281 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2282 }
e7616923 2283 }
4cecb76f 2284 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2285
2286 if (!call_close) {
963d8fe5
TM		 2287 /* Note: exit _without_ calling nfs4_close_done */
2288 task->tk_action = NULL;
a3ca5651 2289 goto out;
9512135d 2290 }
88069f77 2291
f7e8917a 2292 if (calldata->arg.fmode == 0) {
88069f77 2293 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2294 if (calldata->roc &&
7fdab069 2295 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2296 goto out;
f7e8917a 2297 }
88069f77 2298
516a6af6 2299 nfs_fattr_init(calldata->res.fattr);
26e976a8 2300 calldata->timestamp = jiffies;
7fdab069 2301 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2302 &calldata->arg.seq_args,
2303 &calldata->res.seq_res,
2240a9e2
TM		 2304 task) != 0)
2305 nfs_release_seqid(calldata->arg.seqid);
2306 else
2307 rpc_call_start(task);
a3ca5651
CL		 2308out:
2309 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2310}
2311
963d8fe5 2312static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2313 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2314 .rpc_call_done = nfs4_close_done,
2315 .rpc_release = nfs4_free_closedata,
2316};
2317
1da177e4
LT		 2318/*
2319 * It is possible for data to be read/written from a mem-mapped file
2320 * after the sys_close call (which hits the vfs layer as a flush).
2321 * This means that we can't safely call nfsv4 close on a file until
2322 * the inode is cleared. This in turn means that we are not good
2323 * NFSv4 citizens - we do not indicate to the server to update the file's
2324 * share state even when we are done with one of the three share
2325 * stateid's in the inode.
2326 *
2327 * NOTE: Caller must be holding the sp->so_owner semaphore!
2328 */
1f7977c1 2329int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2330{
4a35bd41 2331 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2332 struct nfs4_closedata *calldata;
b39e625b
TM		 2333 struct nfs4_state_owner *sp = state->owner;
2334 struct rpc_task *task;
5138fde0
TM		 2335 struct rpc_message msg = {
2336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2337 .rpc_cred = state->owner->so_cred,
2338 };
c970aa85
TM		 2339 struct rpc_task_setup task_setup_data = {
2340 .rpc_client = server->client,
5138fde0 2341 .rpc_message = &msg,
c970aa85 2342 .callback_ops = &nfs4_close_ops,
101070ca 2343 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2344 .flags = RPC_TASK_ASYNC,
2345 };
9512135d 2346 int status = -ENOMEM;
1da177e4 2347
8535b2be 2348 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2349 if (calldata == NULL)
9512135d 2350 goto out;
9d12b216 2351 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2352 calldata->inode = state->inode;
1da177e4 2353 calldata->state = state;
4a35bd41 2354 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2355 calldata->arg.stateid = &state->open_stateid;
1da177e4 2356 /* Serialization for the sequence id */
8535b2be 2357 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2358 if (calldata->arg.seqid == NULL)
2359 goto out_free_calldata;
dc0b027d 2360 calldata->arg.fmode = 0;
a65318bf 2361 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2362 calldata->res.fattr = &calldata->fattr;
c1d51931 2363 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2364 calldata->res.server = server;
1f7977c1 2365 calldata->roc = pnfs_roc(state->inode);
643168c2 2366 nfs_sb_active(calldata->inode->i_sb);
9512135d 2367
1174dd1f
TM		 2368 msg.rpc_argp = &calldata->arg;
2369 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2370 task_setup_data.callback_data = calldata;
2371 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2372 if (IS_ERR(task))
2373 return PTR_ERR(task);
a49c3c77
TM		 2374 status = 0;
2375 if (wait)
2376 status = rpc_wait_for_completion_task(task);
b39e625b 2377 rpc_put_task(task);
a49c3c77 2378 return status;
9512135d
TM		 2379out_free_calldata:
2380 kfree(calldata);
2381out:
b39e625b
TM		 2382 nfs4_put_open_state(state);
2383 nfs4_put_state_owner(sp);
9512135d 2384 return status;
1da177e4
LT		 2385}
2386
2b484297 2387static struct inode *
cd9a1c0e 2388nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2389{
1da177e4 2390 struct nfs4_state *state;
1da177e4 2391
565277f6 2392 /* Protect against concurrent sillydeletes */
82be417a
AA		 2393 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2394 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2395 if (IS_ERR(state))
2396 return ERR_CAST(state);
cd9a1c0e 2397 ctx->state = state;
f46e0bd3 2398 return igrab(state->inode);
1da177e4
LT		 2399}
2400
1185a552 2401static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2402{
2403 if (ctx->state == NULL)
2404 return;
2405 if (is_sync)
643168c2 2406 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2407 else
643168c2 2408 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2409}
1da177e4
LT		 2410
2411static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2412{
43652ad5
BH		 2413 struct nfs4_server_caps_arg args = {
2414 .fhandle = fhandle,
2415 };
1da177e4
LT		 2416 struct nfs4_server_caps_res res = {};
2417 struct rpc_message msg = {
2418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2419 .rpc_argp = &args,
1da177e4
LT		 2420 .rpc_resp = &res,
2421 };
2422 int status;
2423
7c513058 2424 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2425 if (status == 0) {
2426 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2427 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2428 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2429 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2430 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2431 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2432 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2433 server->caps |= NFS_CAP_ACLS;
2434 if (res.has_links != 0)
2435 server->caps |= NFS_CAP_HARDLINKS;
2436 if (res.has_symlinks != 0)
2437 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2438 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2439 server->caps |= NFS_CAP_FILEID;
2440 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2441 server->caps |= NFS_CAP_MODE;
2442 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2443 server->caps |= NFS_CAP_NLINK;
2444 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2445 server->caps |= NFS_CAP_OWNER;
2446 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2447 server->caps |= NFS_CAP_OWNER_GROUP;
2448 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2449 server->caps |= NFS_CAP_ATIME;
2450 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2451 server->caps |= NFS_CAP_CTIME;
2452 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2453 server->caps |= NFS_CAP_MTIME;
2454
a65318bf
TM		 2455 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2456 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2457 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2458 server->acl_bitmask = res.acl_bitmask;
264e6351 2459 server->fh_expire_type = res.fh_expire_type;
1da177e4 2460 }
cccef3b9 2461
1da177e4
LT		 2462 return status;
2463}
2464
55a97593 2465int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2466{
2467 struct nfs4_exception exception = { };
2468 int err;
2469 do {
2470 err = nfs4_handle_exception(server,
2471 _nfs4_server_capabilities(server, fhandle),
2472 &exception);
2473 } while (exception.retry);
2474 return err;
2475}
2476
2477static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2478 struct nfs_fsinfo *info)
2479{
1da177e4
LT		 2480 struct nfs4_lookup_root_arg args = {
2481 .bitmask = nfs4_fattr_bitmap,
2482 };
2483 struct nfs4_lookup_res res = {
2484 .server = server,
0e574af1 2485 .fattr = info->fattr,
1da177e4
LT		 2486 .fh = fhandle,
2487 };
2488 struct rpc_message msg = {
2489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2490 .rpc_argp = &args,
2491 .rpc_resp = &res,
2492 };
008f55d0 2493
0e574af1 2494 nfs_fattr_init(info->fattr);
7c513058 2495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2496}
2497
2498static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2499 struct nfs_fsinfo *info)
2500{
2501 struct nfs4_exception exception = { };
2502 int err;
2503 do {
fb8a5ba8
BS		 2504 err = _nfs4_lookup_root(server, fhandle, info);
2505 switch (err) {
2506 case 0:
2507 case -NFS4ERR_WRONGSEC:
05e9cfb4 2508 goto out;
fb8a5ba8
BS		 2509 default:
2510 err = nfs4_handle_exception(server, err, &exception);
2511 }
1da177e4 2512 } while (exception.retry);
05e9cfb4 2513out:
1da177e4
LT		 2514 return err;
2515}
2516
8f70e95f
BS		 2517static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2518 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2519{
2520 struct rpc_auth *auth;
2521 int ret;
2522
2523 auth = rpcauth_create(flavor, server->client);
e8d920c5 2524 if (IS_ERR(auth)) {
8f70e95f
BS		 2525 ret = -EIO;
2526 goto out;
2527 }
2528 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2529out:
2530 return ret;
2531}
2532
801a16dc 2533static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2534 struct nfs_fsinfo *info)
1da177e4 2535{
8f70e95f 2536 int i, len, status = 0;
0fabee24 2537 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2538
6a1a1e34 2539 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2540 if (len < 0)
2541 return len;
8f70e95f
BS		 2542
2543 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2544 /* AUTH_UNIX is the default flavor if none was specified,
2545 * thus has already been tried. */
2546 if (flav_array[i] == RPC_AUTH_UNIX)
2547 continue;
2548
8f70e95f 2549 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2550 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2551 continue;
2552 break;
8f70e95f 2553 }
fb8a5ba8
BS		 2554 /*
2555 * -EACCESS could mean that the user doesn't have correct permissions
2556 * to access the mount. It could also mean that we tried to mount
2557 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2558 * existing mount programs don't handle -EACCES very well so it should
2559 * be mapped to -EPERM instead.
2560 */
2561 if (status == -EACCES)
2562 status = -EPERM;
801a16dc
BS		 2563 return status;
2564}
2565
2566/*
2567 * get the file handle for the "/" directory on the server
2568 */
3028eb2b
BS		 2569int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2570 struct nfs_fsinfo *info)
801a16dc 2571{
fca78d6d 2572 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2573 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2574 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2575 /*
2576 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2577 * by nfs4_map_errors() as this function exits.
2578 */
fca78d6d 2579 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2580 if (status == 0)
2581 status = nfs4_server_capabilities(server, fhandle);
2582 if (status == 0)
2583 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2584 return nfs4_map_errors(status);
1da177e4
LT		 2585}
2586
bae36241
BS		 2587static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2588 struct nfs_fsinfo *info)
2589{
2590 int error;
2591 struct nfs_fattr *fattr = info->fattr;
2592
2593 error = nfs4_server_capabilities(server, mntfh);
2594 if (error < 0) {
2595 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2596 return error;
2597 }
2598
2599 error = nfs4_proc_getattr(server, mntfh, fattr);
2600 if (error < 0) {
2601 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2602 return error;
2603 }
2604
2605 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2606 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2607 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2608
2609 return error;
2610}
2611
6b97fd3d
MN		 2612/*
2613 * Get locations and (maybe) other attributes of a referral.
2614 * Note that we'll actually follow the referral later when
2615 * we detect fsid mismatch in inode revalidation
2616 */
f05d147f
BS		 2617static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2618 const struct qstr *name, struct nfs_fattr *fattr,
2619 struct nfs_fh *fhandle)
6b97fd3d
MN		 2620{
2621 int status = -ENOMEM;
2622 struct page *page = NULL;
2623 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2624
2625 page = alloc_page(GFP_KERNEL);
2626 if (page == NULL)
2627 goto out;
2628 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2629 if (locations == NULL)
2630 goto out;
2631
f05d147f 2632 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2633 if (status != 0)
2634 goto out;
2635 /* Make sure server returned a different fsid for the referral */
2636 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2637 dprintk("%s: server did not return a different fsid for"
2638 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2639 status = -EIO;
2640 goto out;
2641 }
533eb461
AA		 2642 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2643 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2644
533eb461 2645 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2646 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2647 memset(fhandle, 0, sizeof(struct nfs_fh));
2648out:
2649 if (page)
2650 __free_page(page);
5d7ca35a 2651 kfree(locations);
6b97fd3d
MN		 2652 return status;
2653}
2654
1da177e4
LT		 2655static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2656{
2657 struct nfs4_getattr_arg args = {
2658 .fh = fhandle,
2659 .bitmask = server->attr_bitmask,
2660 };
2661 struct nfs4_getattr_res res = {
2662 .fattr = fattr,
2663 .server = server,
2664 };
2665 struct rpc_message msg = {
2666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2667 .rpc_argp = &args,
2668 .rpc_resp = &res,
2669 };
2670
0e574af1 2671 nfs_fattr_init(fattr);
7c513058 2672 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2673}
2674
2675static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2676{
2677 struct nfs4_exception exception = { };
2678 int err;
2679 do {
2680 err = nfs4_handle_exception(server,
2681 _nfs4_proc_getattr(server, fhandle, fattr),
2682 &exception);
2683 } while (exception.retry);
2684 return err;
2685}
2686
2687/*
2688 * The file is not closed if it is opened due to the a request to change
2689 * the size of the file. The open call will not be needed once the
2690 * VFS layer lookup-intents are implemented.
2691 *
2692 * Close is called when the inode is destroyed.
2693 * If we haven't opened the file for O_WRONLY, we
2694 * need to in the size_change case to obtain a stateid.
2695 *
2696 * Got race?
2697 * Because OPEN is always done by name in nfsv4, it is
2698 * possible that we opened a different file by the same
2699 * name. We can recognize this race condition, but we
2700 * can't do anything about it besides returning an error.
2701 *
2702 * This will be fixed with VFS changes (lookup-intent).
2703 */
2704static int
2705nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2706 struct iattr *sattr)
2707{
08e9eac4 2708 struct inode *inode = dentry->d_inode;
659bfcd6 2709 struct rpc_cred *cred = NULL;
d530838b 2710 struct nfs4_state *state = NULL;
1da177e4
LT		 2711 int status;
2712
8a1636c4
BH		 2713 if (pnfs_ld_layoutret_on_setattr(inode))
2714 pnfs_return_layout(inode);
2715
0e574af1 2716 nfs_fattr_init(fattr);
1da177e4 2717
2669940d
AA		 2718 /* Deal with open(O_TRUNC) */
2719 if (sattr->ia_valid & ATTR_OPEN)
2720 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2721
2722 /* Optimization: if the end result is no change, don't RPC */
2723 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2724 return 0;
2725
d530838b 2726 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2727 if (sattr->ia_valid & ATTR_FILE) {
2728 struct nfs_open_context *ctx;
2729
2730 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2731 if (ctx) {
2732 cred = ctx->cred;
2733 state = ctx->state;
2734 }
659bfcd6 2735 }
08e9eac4 2736
659bfcd6 2737 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2738 if (status == 0)
2739 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2740 return status;
2741}
2742
0c2e53f1
TM		 2743static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2744 const struct qstr *name, struct nfs_fh *fhandle,
2745 struct nfs_fattr *fattr)
2b3de441 2746{
0c2e53f1 2747 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2748 int status;
2749 struct nfs4_lookup_arg args = {
2750 .bitmask = server->attr_bitmask,
0c2e53f1 2751 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2752 .name = name,
2753 };
2754 struct nfs4_lookup_res res = {
2755 .server = server,
2756 .fattr = fattr,
2757 .fh = fhandle,
2758 };
2759 struct rpc_message msg = {
2760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2761 .rpc_argp = &args,
2762 .rpc_resp = &res,
2763 };
2764
2765 nfs_fattr_init(fattr);
2766
1da177e4 2767 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2768 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2769 dprintk("NFS reply lookup: %d\n", status);
2770 return status;
2771}
2772
72de53ec 2773static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2774{
7ebb9315 2775 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2776 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2777 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2778 fattr->nlink = 2;
2779}
2780
72de53ec
BS		 2781static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2782 struct qstr *name, struct nfs_fh *fhandle,
2783 struct nfs_fattr *fattr)
1da177e4
LT		 2784{
2785 struct nfs4_exception exception = { };
72de53ec 2786 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2787 int err;
2788 do {
72de53ec
BS		 2789 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2790 switch (err) {
08ef7bd3 2791 case -NFS4ERR_BADNAME:
72de53ec
BS		 2792 err = -ENOENT;
2793 goto out;
0c2e53f1 2794 case -NFS4ERR_MOVED:
f05d147f 2795 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2796 goto out;
0c2e53f1 2797 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2798 err = -EPERM;
2799 if (client != *clnt)
2800 goto out;
2801
2802 client = nfs4_create_sec_client(client, dir, name);
2803 if (IS_ERR(client))
2804 return PTR_ERR(client);
2805
2806 exception.retry = 1;
2807 break;
2808 default:
2809 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2810 }
1da177e4 2811 } while (exception.retry);
72de53ec
BS		 2812
2813out:
2814 if (err == 0)
2815 *clnt = client;
2816 else if (client != *clnt)
2817 rpc_shutdown_client(client);
2818
1da177e4
LT		 2819 return err;
2820}
2821
80a16b21 2822static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2823 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2824{
2825 int status;
2826 struct rpc_clnt *client = NFS_CLIENT(dir);
2827
2828 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2829 if (client != NFS_CLIENT(dir)) {
2830 rpc_shutdown_client(client);
2831 nfs_fixup_secinfo_attributes(fattr);
2832 }
2833 return status;
2834}
2835
f05d147f
BS		 2836struct rpc_clnt *
2837nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2838 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2839{
2840 int status;
2841 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2842
2843 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2844 if (status < 0) {
2845 rpc_shutdown_client(client);
2846 return ERR_PTR(status);
2847 }
2848 return client;
2849}
2850
1da177e4
LT		 2851static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2852{
76b32999 2853 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2854 struct nfs4_accessargs args = {
2855 .fh = NFS_FH(inode),
a4980e78 2856 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2857 };
2858 struct nfs4_accessres res = {
2859 .server = server,
1da177e4 2860 };
1da177e4
LT		 2861 struct rpc_message msg = {
2862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2863 .rpc_argp = &args,
2864 .rpc_resp = &res,
2865 .rpc_cred = entry->cred,
2866 };
2867 int mode = entry->mask;
2868 int status;
2869
2870 /*
2871 * Determine which access bits we want to ask for...
2872 */
2873 if (mode & MAY_READ)
2874 args.access |= NFS4_ACCESS_READ;
2875 if (S_ISDIR(inode->i_mode)) {
2876 if (mode & MAY_WRITE)
2877 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2878 if (mode & MAY_EXEC)
2879 args.access |= NFS4_ACCESS_LOOKUP;
2880 } else {
2881 if (mode & MAY_WRITE)
2882 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2883 if (mode & MAY_EXEC)
2884 args.access |= NFS4_ACCESS_EXECUTE;
2885 }
c407d41a
TM		 2886
2887 res.fattr = nfs_alloc_fattr();
2888 if (res.fattr == NULL)
2889 return -ENOMEM;
2890
7c513058 2891 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2892 if (!status) {
6168f62c 2893 nfs_access_set_mask(entry, res.access);
c407d41a 2894 nfs_refresh_inode(inode, res.fattr);
1da177e4 2895 }
c407d41a 2896 nfs_free_fattr(res.fattr);
1da177e4
LT		 2897 return status;
2898}
2899
2900static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2901{
2902 struct nfs4_exception exception = { };
2903 int err;
2904 do {
2905 err = nfs4_handle_exception(NFS_SERVER(inode),
2906 _nfs4_proc_access(inode, entry),
2907 &exception);
2908 } while (exception.retry);
2909 return err;
2910}
2911
2912/*
2913 * TODO: For the time being, we don't try to get any attributes
2914 * along with any of the zero-copy operations READ, READDIR,
2915 * READLINK, WRITE.
2916 *
2917 * In the case of the first three, we want to put the GETATTR
2918 * after the read-type operation -- this is because it is hard
2919 * to predict the length of a GETATTR response in v4, and thus
2920 * align the READ data correctly. This means that the GETATTR
2921 * may end up partially falling into the page cache, and we should
2922 * shift it into the 'tail' of the xdr_buf before processing.
2923 * To do this efficiently, we need to know the total length
2924 * of data received, which doesn't seem to be available outside
2925 * of the RPC layer.
2926 *
2927 * In the case of WRITE, we also want to put the GETATTR after
2928 * the operation -- in this case because we want to make sure
140150db 2929 * we get the post-operation mtime and size.
1da177e4
LT		 2930 *
2931 * Both of these changes to the XDR layer would in fact be quite
2932 * minor, but I decided to leave them for a subsequent patch.
2933 */
2934static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2935 unsigned int pgbase, unsigned int pglen)
2936{
2937 struct nfs4_readlink args = {
2938 .fh = NFS_FH(inode),
2939 .pgbase = pgbase,
2940 .pglen = pglen,
2941 .pages = &page,
2942 };
f50c7000 2943 struct nfs4_readlink_res res;
1da177e4
LT		 2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2946 .rpc_argp = &args,
f50c7000 2947 .rpc_resp = &res,
1da177e4
LT		 2948 };
2949
7c513058 2950 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2951}
2952
2953static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2954 unsigned int pgbase, unsigned int pglen)
2955{
2956 struct nfs4_exception exception = { };
2957 int err;
2958 do {
2959 err = nfs4_handle_exception(NFS_SERVER(inode),
2960 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2961 &exception);
2962 } while (exception.retry);
2963 return err;
2964}
2965
1da177e4 2966/*
8867fe58 2967 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2968 */
1da177e4
LT		 2969static int
2970nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2971 int flags)
1da177e4 2972{
8867fe58 2973 struct nfs_open_context *ctx;
1da177e4 2974 struct nfs4_state *state;
1da177e4
LT		 2975 int status = 0;
2976
8867fe58
MS		 2977 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2978 if (IS_ERR(ctx))
2979 return PTR_ERR(ctx);
2980
a8a5da99 2981 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2982 state = nfs4_do_open(dir, dentry, ctx->mode,
2983 flags, sattr, ctx->cred,
2984 &ctx->mdsthreshold);
d4d9cdcb 2985 d_drop(dentry);
1da177e4
LT		 2986 if (IS_ERR(state)) {
2987 status = PTR_ERR(state);
c0204fd2 2988 goto out;
1da177e4 2989 }
d4d9cdcb 2990 d_add(dentry, igrab(state->inode));
d75340cc 2991 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2992 ctx->state = state;
1da177e4 2993out:
8867fe58 2994 put_nfs_open_context(ctx);
1da177e4
LT		 2995 return status;
2996}
2997
2998static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2999{
16e42959 3000 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3001 struct nfs_removeargs args = {
1da177e4 3002 .fh = NFS_FH(dir),
26fe5750 3003 .name = *name,
16e42959 3004 };
4fdc17b2 3005 struct nfs_removeres res = {
16e42959 3006 .server = server,
1da177e4 3007 };
1da177e4 3008 struct rpc_message msg = {
4fdc17b2
TM		 3009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3010 .rpc_argp = &args,
3011 .rpc_resp = &res,
1da177e4 3012 };
778d2817 3013 int status;
1da177e4 3014
7c513058 3015 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3016 if (status == 0)
16e42959 3017 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3018 return status;
3019}
3020
3021static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3022{
3023 struct nfs4_exception exception = { };
3024 int err;
3025 do {
3026 err = nfs4_handle_exception(NFS_SERVER(dir),
3027 _nfs4_proc_remove(dir, name),
3028 &exception);
3029 } while (exception.retry);
3030 return err;
3031}
3032
e4eff1a6 3033static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3034{
e4eff1a6
TM		 3035 struct nfs_server *server = NFS_SERVER(dir);
3036 struct nfs_removeargs *args = msg->rpc_argp;
3037 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3038
e4eff1a6 3039 res->server = server;
1da177e4 3040 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3041 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3042}
3043
34e137cc
BS		 3044static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3045{
3046 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
3047 &data->args.seq_args,
3048 &data->res.seq_res,
3049 task))
3050 return;
3051 rpc_call_start(task);
1da177e4
LT		 3052}
3053
e4eff1a6 3054static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3055{
e4eff1a6
TM		 3056 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3057
14516c3a
TM		 3058 if (!nfs4_sequence_done(task, &res->seq_res))
3059 return 0;
9e33bed5 3060 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3061 return 0;
3062 update_changeattr(dir, &res->cinfo);
e4eff1a6 3063 return 1;
1da177e4
LT		 3064}
3065
d3d4152a
JL		 3066static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3067{
3068 struct nfs_server *server = NFS_SERVER(dir);
3069 struct nfs_renameargs *arg = msg->rpc_argp;
3070 struct nfs_renameres *res = msg->rpc_resp;
3071
3072 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3073 res->server = server;
9d12b216 3074 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3075}
3076
c6bfa1a1
BS		 3077static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3078{
3079 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3080 &data->args.seq_args,
3081 &data->res.seq_res,
3082 task))
3083 return;
3084 rpc_call_start(task);
d3d4152a
JL		 3085}
3086
3087static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3088 struct inode *new_dir)
3089{
3090 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3091
3092 if (!nfs4_sequence_done(task, &res->seq_res))
3093 return 0;
3094 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3095 return 0;
3096
3097 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3098 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3099 return 1;
3100}
3101
1da177e4
LT		 3102static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3103 struct inode *new_dir, struct qstr *new_name)
3104{
6caf2c82 3105 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3106 struct nfs_renameargs arg = {
1da177e4
LT		 3107 .old_dir = NFS_FH(old_dir),
3108 .new_dir = NFS_FH(new_dir),
3109 .old_name = old_name,
3110 .new_name = new_name,
6caf2c82 3111 };
e8582a8b 3112 struct nfs_renameres res = {
6caf2c82 3113 .server = server,
1da177e4 3114 };
1da177e4
LT		 3115 struct rpc_message msg = {
3116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3117 .rpc_argp = &arg,
3118 .rpc_resp = &res,
3119 };
011fff72 3120 int status = -ENOMEM;
1da177e4 3121
7c513058 3122 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3123 if (!status) {
3124 update_changeattr(old_dir, &res.old_cinfo);
3125 update_changeattr(new_dir, &res.new_cinfo);
3126 }
3127 return status;
3128}
3129
3130static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3131 struct inode *new_dir, struct qstr *new_name)
3132{
3133 struct nfs4_exception exception = { };
3134 int err;
3135 do {
3136 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3137 _nfs4_proc_rename(old_dir, old_name,
3138 new_dir, new_name),
3139 &exception);
3140 } while (exception.retry);
3141 return err;
3142}
3143
3144static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3145{
91ba2eee 3146 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3147 struct nfs4_link_arg arg = {
3148 .fh = NFS_FH(inode),
3149 .dir_fh = NFS_FH(dir),
3150 .name = name,
91ba2eee
TM		 3151 .bitmask = server->attr_bitmask,
3152 };
91ba2eee
TM		 3153 struct nfs4_link_res res = {
3154 .server = server,
1da177e4 3155 };
1da177e4
LT		 3156 struct rpc_message msg = {
3157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3158 .rpc_argp = &arg,
91ba2eee 3159 .rpc_resp = &res,
1da177e4 3160 };
136f2627
TM		 3161 int status = -ENOMEM;
3162
3163 res.fattr = nfs_alloc_fattr();
778d2817 3164 if (res.fattr == NULL)
136f2627 3165 goto out;
1da177e4 3166
7c513058 3167 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3168 if (!status) {
3169 update_changeattr(dir, &res.cinfo);
73a3d07c 3170 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3171 }
136f2627 3172out:
136f2627 3173 nfs_free_fattr(res.fattr);
1da177e4
LT		 3174 return status;
3175}
3176
3177static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3178{
3179 struct nfs4_exception exception = { };
3180 int err;
3181 do {
3182 err = nfs4_handle_exception(NFS_SERVER(inode),
3183 _nfs4_proc_link(inode, dir, name),
3184 &exception);
3185 } while (exception.retry);
3186 return err;
3187}
3188
57dc9a57
TM		 3189struct nfs4_createdata {
3190 struct rpc_message msg;
3191 struct nfs4_create_arg arg;
3192 struct nfs4_create_res res;
3193 struct nfs_fh fh;
3194 struct nfs_fattr fattr;
57dc9a57
TM		 3195};
3196
3197static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3198 struct qstr *name, struct iattr *sattr, u32 ftype)
3199{
3200 struct nfs4_createdata *data;
3201
3202 data = kzalloc(sizeof(*data), GFP_KERNEL);
3203 if (data != NULL) {
3204 struct nfs_server *server = NFS_SERVER(dir);
3205
3206 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3207 data->msg.rpc_argp = &data->arg;
3208 data->msg.rpc_resp = &data->res;
3209 data->arg.dir_fh = NFS_FH(dir);
3210 data->arg.server = server;
3211 data->arg.name = name;
3212 data->arg.attrs = sattr;
3213 data->arg.ftype = ftype;
3214 data->arg.bitmask = server->attr_bitmask;
3215 data->res.server = server;
3216 data->res.fh = &data->fh;
3217 data->res.fattr = &data->fattr;
57dc9a57 3218 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3219 }
3220 return data;
3221}
3222
3223static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3224{
7c513058 3225 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3226 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3227 if (status == 0) {
3228 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3229 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3230 }
3231 return status;
3232}
3233
3234static void nfs4_free_createdata(struct nfs4_createdata *data)
3235{
3236 kfree(data);
3237}
3238
4f390c15 3239static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3240 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3241{
57dc9a57
TM		 3242 struct nfs4_createdata *data;
3243 int status = -ENAMETOOLONG;
1da177e4 3244
94a6d753 3245 if (len > NFS4_MAXPATHLEN)
57dc9a57 3246 goto out;
4f390c15 3247
57dc9a57
TM		 3248 status = -ENOMEM;
3249 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3250 if (data == NULL)
3251 goto out;
3252
3253 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3254 data->arg.u.symlink.pages = &page;
3255 data->arg.u.symlink.len = len;
1da177e4 3256
57dc9a57
TM		 3257 status = nfs4_do_create(dir, dentry, data);
3258
3259 nfs4_free_createdata(data);
3260out:
1da177e4
LT		 3261 return status;
3262}
3263
4f390c15 3264static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3265 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3266{
3267 struct nfs4_exception exception = { };
3268 int err;
3269 do {
3270 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3271 _nfs4_proc_symlink(dir, dentry, page,
3272 len, sattr),
1da177e4
LT		 3273 &exception);
3274 } while (exception.retry);
3275 return err;
3276}
3277
3278static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3279 struct iattr *sattr)
3280{
57dc9a57
TM		 3281 struct nfs4_createdata *data;
3282 int status = -ENOMEM;
1da177e4 3283
57dc9a57
TM		 3284 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3285 if (data == NULL)
3286 goto out;
3287
3288 status = nfs4_do_create(dir, dentry, data);
3289
3290 nfs4_free_createdata(data);
3291out:
1da177e4
LT		 3292 return status;
3293}
3294
3295static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3296 struct iattr *sattr)
3297{
3298 struct nfs4_exception exception = { };
3299 int err;
a8a5da99
AK		 3300
3301 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3302 do {
3303 err = nfs4_handle_exception(NFS_SERVER(dir),
3304 _nfs4_proc_mkdir(dir, dentry, sattr),
3305 &exception);
3306 } while (exception.retry);
3307 return err;
3308}
3309
3310static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3311 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3312{
3313 struct inode *dir = dentry->d_inode;
3314 struct nfs4_readdir_arg args = {
3315 .fh = NFS_FH(dir),
56e4ebf8 3316 .pages = pages,
1da177e4
LT		 3317 .pgbase = 0,
3318 .count = count,
96d25e53 3319 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3320 .plus = plus,
1da177e4
LT		 3321 };
3322 struct nfs4_readdir_res res;
3323 struct rpc_message msg = {
3324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3325 .rpc_argp = &args,
3326 .rpc_resp = &res,
3327 .rpc_cred = cred,
3328 };
3329 int status;
3330
3110ff80 3331 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3332 dentry->d_parent->d_name.name,
3333 dentry->d_name.name,
3334 (unsigned long long)cookie);
c3f52af3 3335 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3336 res.pgbase = args.pgbase;
7c513058 3337 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3338 if (status >= 0) {
c3f52af3 3339 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3340 status += args.pgbase;
3341 }
c4812998
TM		 3342
3343 nfs_invalidate_atime(dir);
3344
3110ff80 3345 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3346 return status;
3347}
3348
3349static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3350 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3351{
3352 struct nfs4_exception exception = { };
3353 int err;
3354 do {
3355 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3356 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3357 pages, count, plus),
1da177e4
LT		 3358 &exception);
3359 } while (exception.retry);
3360 return err;
3361}
3362
3363static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3364 struct iattr *sattr, dev_t rdev)
3365{
57dc9a57
TM		 3366 struct nfs4_createdata *data;
3367 int mode = sattr->ia_mode;
3368 int status = -ENOMEM;
1da177e4 3369
57dc9a57
TM		 3370 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3371 if (data == NULL)
3372 goto out;
3373
1da177e4 3374 if (S_ISFIFO(mode))
57dc9a57 3375 data->arg.ftype = NF4FIFO;
1da177e4 3376 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3377 data->arg.ftype = NF4BLK;
3378 data->arg.u.device.specdata1 = MAJOR(rdev);
3379 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3380 }
3381 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3382 data->arg.ftype = NF4CHR;
3383 data->arg.u.device.specdata1 = MAJOR(rdev);
3384 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3385 } else if (!S_ISSOCK(mode)) {
3386 status = -EINVAL;
3387 goto out_free;
1da177e4 3388 }
1da177e4 3389
57dc9a57 3390 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3391out_free:
57dc9a57
TM		 3392 nfs4_free_createdata(data);
3393out:
1da177e4
LT		 3394 return status;
3395}
3396
3397static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3398 struct iattr *sattr, dev_t rdev)
3399{
3400 struct nfs4_exception exception = { };
3401 int err;
a8a5da99
AK		 3402
3403 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3404 do {
3405 err = nfs4_handle_exception(NFS_SERVER(dir),
3406 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3407 &exception);
3408 } while (exception.retry);
3409 return err;
3410}
3411
3412static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3413 struct nfs_fsstat *fsstat)
3414{
3415 struct nfs4_statfs_arg args = {
3416 .fh = fhandle,
3417 .bitmask = server->attr_bitmask,
3418 };
24ad148a
BH		 3419 struct nfs4_statfs_res res = {
3420 .fsstat = fsstat,
3421 };
1da177e4
LT		 3422 struct rpc_message msg = {
3423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3424 .rpc_argp = &args,
24ad148a 3425 .rpc_resp = &res,
1da177e4
LT		 3426 };
3427
0e574af1 3428 nfs_fattr_init(fsstat->fattr);
7c513058 3429 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3430}
3431
3432static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3433{
3434 struct nfs4_exception exception = { };
3435 int err;
3436 do {
3437 err = nfs4_handle_exception(server,
3438 _nfs4_proc_statfs(server, fhandle, fsstat),
3439 &exception);
3440 } while (exception.retry);
3441 return err;
3442}
3443
3444static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3445 struct nfs_fsinfo *fsinfo)
3446{
3447 struct nfs4_fsinfo_arg args = {
3448 .fh = fhandle,
3449 .bitmask = server->attr_bitmask,
3450 };
3dda5e43
BH		 3451 struct nfs4_fsinfo_res res = {
3452 .fsinfo = fsinfo,
3453 };
1da177e4
LT		 3454 struct rpc_message msg = {
3455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3456 .rpc_argp = &args,
3dda5e43 3457 .rpc_resp = &res,
1da177e4
LT		 3458 };
3459
7c513058 3460 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3461}
3462
3463static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3464{
3465 struct nfs4_exception exception = { };
3466 int err;
3467
3468 do {
3469 err = nfs4_handle_exception(server,
3470 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3471 &exception);
3472 } while (exception.retry);
3473 return err;
3474}
3475
3476static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3477{
e38eb650
BS		 3478 int error;
3479
0e574af1 3480 nfs_fattr_init(fsinfo->fattr);
e38eb650 3481 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3482 if (error == 0) {
3483 /* block layout checks this! */
3484 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3485 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3486 }
e38eb650
BS		 3487
3488 return error;
1da177e4
LT		 3489}
3490
3491static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3492 struct nfs_pathconf *pathconf)
3493{
3494 struct nfs4_pathconf_arg args = {
3495 .fh = fhandle,
3496 .bitmask = server->attr_bitmask,
3497 };
d45b2989
BH		 3498 struct nfs4_pathconf_res res = {
3499 .pathconf = pathconf,
3500 };
1da177e4
LT		 3501 struct rpc_message msg = {
3502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3503 .rpc_argp = &args,
d45b2989 3504 .rpc_resp = &res,
1da177e4
LT		 3505 };
3506
3507 /* None of the pathconf attributes are mandatory to implement */
3508 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3509 memset(pathconf, 0, sizeof(*pathconf));
3510 return 0;
3511 }
3512
0e574af1 3513 nfs_fattr_init(pathconf->fattr);
7c513058 3514 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3515}
3516
3517static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3518 struct nfs_pathconf *pathconf)
3519{
3520 struct nfs4_exception exception = { };
3521 int err;
3522
3523 do {
3524 err = nfs4_handle_exception(server,
3525 _nfs4_proc_pathconf(server, fhandle, pathconf),
3526 &exception);
3527 } while (exception.retry);
3528 return err;
3529}
3530
d20581aa
BH		 3531void __nfs4_read_done_cb(struct nfs_read_data *data)
3532{
cd841605 3533 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3534}
3535
cbdabc7f 3536static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3537{
cd841605 3538 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3539
9e33bed5 3540 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3541 rpc_restart_call_prepare(task);
ec06c096 3542 return -EAGAIN;
1da177e4 3543 }
8850df99 3544
d20581aa 3545 __nfs4_read_done_cb(data);
1da177e4 3546 if (task->tk_status > 0)
ec06c096
TM		 3547 renew_lease(server, data->timestamp);
3548 return 0;
1da177e4
LT		 3549}
3550
cbdabc7f
AA		 3551static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3552{
3553
3554 dprintk("--> %s\n", __func__);
3555
3556 if (!nfs4_sequence_done(task, &data->res.seq_res))
3557 return -EAGAIN;
3558
d20581aa
BH		 3559 return data->read_done_cb ? data->read_done_cb(task, data) :
3560 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3561}
3562
bdc7f021 3563static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3564{
1da177e4 3565 data->timestamp = jiffies;
cbdabc7f 3566 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3567 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3568 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3569}
3570
ea7c3303
BS		 3571static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3572{
cd841605 3573 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3574 &data->args.seq_args,
3575 &data->res.seq_res,
3576 task))
3577 return;
3578 rpc_call_start(task);
1da177e4
LT		 3579}
3580
b029bc9b 3581static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3582{
cd841605 3583 struct inode *inode = data->header->inode;
1da177e4 3584
9e33bed5 3585 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3586 rpc_restart_call_prepare(task);
788e7a89 3587 return -EAGAIN;
1da177e4 3588 }
4f9838c7 3589 if (task->tk_status >= 0) {
1da177e4 3590 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3591 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3592 }
788e7a89 3593 return 0;
1da177e4
LT		 3594}
3595
b029bc9b
FI		 3596static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3597{
3598 if (!nfs4_sequence_done(task, &data->res.seq_res))
3599 return -EAGAIN;
d20581aa
BH		 3600 return data->write_done_cb ? data->write_done_cb(task, data) :
3601 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3602}
3603
5a37f851
TM		 3604static
3605bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3606{
5a37f851
TM		 3607 const struct nfs_pgio_header *hdr = data->header;
3608
3609 /* Don't request attributes for pNFS or O_DIRECT writes */
3610 if (data->ds_clp != NULL || hdr->dreq != NULL)
3611 return false;
3612 /* Otherwise, request attributes if and only if we don't hold
3613 * a delegation
3614 */
011e2a7f 3615 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3616}
a69aef14 3617
bdc7f021 3618static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3619{
cd841605 3620 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3621
5a37f851 3622 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3623 data->args.bitmask = NULL;
3624 data->res.fattr = NULL;
3625 } else
3626 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3627
b029bc9b
FI		 3628 if (!data->write_done_cb)
3629 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3630 data->res.server = server;
1da177e4
LT		 3631 data->timestamp = jiffies;
3632
bdc7f021 3633 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3634 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3635}
3636
c6cb80d0
BS		 3637static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3638{
cd841605 3639 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3640 &data->args.seq_args,
3641 &data->res.seq_res,
3642 task))
3643 return;
3644 rpc_call_start(task);
1da177e4
LT		 3645}
3646
0b7c0153 3647static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3648{
3649 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3650 &data->args.seq_args,
3651 &data->res.seq_res,
3652 task))
3653 return;
3654 rpc_call_start(task);
1da177e4
LT		 3655}
3656
0b7c0153 3657static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3658{
1da177e4 3659 struct inode *inode = data->inode;
14516c3a 3660
9e33bed5 3661 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3662 rpc_restart_call_prepare(task);
788e7a89 3663 return -EAGAIN;
1da177e4 3664 }
788e7a89 3665 return 0;
1da177e4
LT		 3666}
3667
0b7c0153 3668static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3669{
3670 if (!nfs4_sequence_done(task, &data->res.seq_res))
3671 return -EAGAIN;
0b7c0153 3672 return data->commit_done_cb(task, data);
5f452431
FI		 3673}
3674
0b7c0153 3675static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3676{
788e7a89 3677 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3678
0b7c0153
FI		 3679 if (data->commit_done_cb == NULL)
3680 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3681 data->res.server = server;
bdc7f021 3682 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3683 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3684}
3685
9bc4e3ca
CL		 3686struct nfs4_renewdata {
3687 struct nfs_client *client;
3688 unsigned long timestamp;
3689};
3690
1da177e4
LT		 3691/*
3692 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3693 * standalone procedure for queueing an asynchronous RENEW.
3694 */
9bc4e3ca 3695static void nfs4_renew_release(void *calldata)
dc96aef9 3696{
9bc4e3ca
CL		 3697 struct nfs4_renewdata *data = calldata;
3698 struct nfs_client *clp = data->client;
dc96aef9 3699
0851de06
AB		 3700 if (atomic_read(&clp->cl_count) > 1)
3701 nfs4_schedule_state_renewal(clp);
3702 nfs_put_client(clp);
9bc4e3ca 3703 kfree(data);
dc96aef9
AB		 3704}
3705
9bc4e3ca 3706static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3707{
9bc4e3ca
CL		 3708 struct nfs4_renewdata *data = calldata;
3709 struct nfs_client *clp = data->client;
3710 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3711
3712 if (task->tk_status < 0) {
95baa25c 3713 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3714 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3715 return;
3716 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3717 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3718 return;
3719 }
3720 nfs4_schedule_path_down_recovery(clp);
1da177e4 3721 }
452e9352 3722 do_renew_lease(clp, timestamp);
1da177e4
LT		 3723}
3724
963d8fe5
TM		 3725static const struct rpc_call_ops nfs4_renew_ops = {
3726 .rpc_call_done = nfs4_renew_done,
dc96aef9 3727 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3728};
3729
2f60ea6b 3730static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3731{
3732 struct rpc_message msg = {
3733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3734 .rpc_argp = clp,
b4454fe1 3735 .rpc_cred = cred,
1da177e4 3736 };
9bc4e3ca 3737 struct nfs4_renewdata *data;
1da177e4 3738
2f60ea6b
TM		 3739 if (renew_flags == 0)
3740 return 0;
0851de06
AB		 3741 if (!atomic_inc_not_zero(&clp->cl_count))
3742 return -EIO;
b569ad34 3743 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3744 if (data == NULL)
3745 return -ENOMEM;
3746 data->client = clp;
3747 data->timestamp = jiffies;
1da177e4 3748 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3749 &nfs4_renew_ops, data);
1da177e4
LT		 3750}
3751
8534d4ec 3752static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3753{
3754 struct rpc_message msg = {
3755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3756 .rpc_argp = clp,
b4454fe1 3757 .rpc_cred = cred,
1da177e4
LT		 3758 };
3759 unsigned long now = jiffies;
3760 int status;
3761
3762 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3763 if (status < 0)
3764 return status;
452e9352 3765 do_renew_lease(clp, now);
1da177e4
LT		 3766 return 0;
3767}
3768
aa1870af
BF		 3769static inline int nfs4_server_supports_acls(struct nfs_server *server)
3770{
3771 return (server->caps & NFS_CAP_ACLS)
3772 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3773 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3774}
3775
21f498c2
TM		 3776/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3777 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3778 * the stack.
3779 */
21f498c2 3780#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3781
e9e3d724
NH		 3782static int buf_to_pages_noslab(const void *buf, size_t buflen,
3783 struct page **pages, unsigned int *pgbase)
3784{
3785 struct page *newpage, **spages;
3786 int rc = 0;
3787 size_t len;
3788 spages = pages;
3789
3790 do {
21f498c2 3791 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3792 newpage = alloc_page(GFP_KERNEL);
3793
3794 if (newpage == NULL)
3795 goto unwind;
3796 memcpy(page_address(newpage), buf, len);
3797 buf += len;
3798 buflen -= len;
3799 *pages++ = newpage;
3800 rc++;
3801 } while (buflen != 0);
3802
3803 return rc;
3804
3805unwind:
3806 for(; rc > 0; rc--)
3807 __free_page(spages[rc-1]);
3808 return -ENOMEM;
3809}
3810
e50a1c2e
BF		 3811struct nfs4_cached_acl {
3812 int cached;
3813 size_t len;
3e9d4154 3814 char data[0];
e50a1c2e
BF		 3815};
3816
3817static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3818{
3819 struct nfs_inode *nfsi = NFS_I(inode);
3820
3821 spin_lock(&inode->i_lock);
3822 kfree(nfsi->nfs4_acl);
3823 nfsi->nfs4_acl = acl;
3824 spin_unlock(&inode->i_lock);
3825}
3826
3827static void nfs4_zap_acl_attr(struct inode *inode)
3828{
3829 nfs4_set_cached_acl(inode, NULL);
3830}
3831
3832static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3833{
3834 struct nfs_inode *nfsi = NFS_I(inode);
3835 struct nfs4_cached_acl *acl;
3836 int ret = -ENOENT;
3837
3838 spin_lock(&inode->i_lock);
3839 acl = nfsi->nfs4_acl;
3840 if (acl == NULL)
3841 goto out;
3842 if (buf == NULL) /* user is just asking for length */
3843 goto out_len;
3844 if (acl->cached == 0)
3845 goto out;
3846 ret = -ERANGE; /* see getxattr(2) man page */
3847 if (acl->len > buflen)
3848 goto out;
3849 memcpy(buf, acl->data, acl->len);
3850out_len:
3851 ret = acl->len;
3852out:
3853 spin_unlock(&inode->i_lock);
3854 return ret;
3855}
3856
5794d21e 3857static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3858{
3859 struct nfs4_cached_acl *acl;
b291f1b1 3860 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3861
1f1ea6c2 3862 if (buflen <= PAGE_SIZE) {
b291f1b1 3863 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3864 if (acl == NULL)
3865 goto out;
3866 acl->cached = 1;
5794d21e 3867 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3868 } else {
3869 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3870 if (acl == NULL)
3871 goto out;
3872 acl->cached = 0;
3873 }
3874 acl->len = acl_len;
3875out:
3876 nfs4_set_cached_acl(inode, acl);
3877}
3878
bf118a34
AA		 3879/*
3880 * The getxattr API returns the required buffer length when called with a
3881 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3882 * the required buf. On a NULL buf, we send a page of data to the server
3883 * guessing that the ACL request can be serviced by a page. If so, we cache
3884 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3885 * the cache. If not so, we throw away the page, and cache the required
3886 * length. The next getxattr call will then produce another round trip to
3887 * the server, this time with the input buf of the required size.
3888 */
16b4289c 3889static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3890{
bf118a34 3891 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3892 struct nfs_getaclargs args = {
3893 .fh = NFS_FH(inode),
3894 .acl_pages = pages,
3895 .acl_len = buflen,
3896 };
663c79b3
BH		 3897 struct nfs_getaclres res = {
3898 .acl_len = buflen,
3899 };
aa1870af
BF		 3900 struct rpc_message msg = {
3901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3902 .rpc_argp = &args,
663c79b3 3903 .rpc_resp = &res,
aa1870af 3904 };
21f498c2
TM		 3905 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3906 int ret = -ENOMEM, i;
aa1870af 3907
bf118a34
AA		 3908 /* As long as we're doing a round trip to the server anyway,
3909 * let's be prepared for a page of acl data. */
3910 if (npages == 0)
3911 npages = 1;
21f498c2
TM		 3912 if (npages > ARRAY_SIZE(pages))
3913 return -ERANGE;
5a006899 3914
bf118a34
AA		 3915 for (i = 0; i < npages; i++) {
3916 pages[i] = alloc_page(GFP_KERNEL);
3917 if (!pages[i])
3918 goto out_free;
e50a1c2e 3919 }
5a006899
SP		 3920
3921 /* for decoding across pages */
3922 res.acl_scratch = alloc_page(GFP_KERNEL);
3923 if (!res.acl_scratch)
3924 goto out_free;
3925
bf118a34
AA		 3926 args.acl_len = npages * PAGE_SIZE;
3927 args.acl_pgbase = 0;
5a006899 3928
de040bec 3929 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3930 __func__, buf, buflen, npages, args.acl_len);
3931 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3932 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3933 if (ret)
3934 goto out_free;
bf118a34 3935
1f1ea6c2
TM		 3936 /* Handle the case where the passed-in buffer is too short */
3937 if (res.acl_flags & NFS4_ACL_TRUNC) {
3938 /* Did the user only issue a request for the acl length? */
3939 if (buf == NULL)
3940 goto out_ok;
e50a1c2e 3941 ret = -ERANGE;
1f1ea6c2 3942 goto out_free;
e50a1c2e 3943 }
1f1ea6c2
TM		 3944 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3945 if (buf)
3946 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3947out_ok:
3948 ret = res.acl_len;
e50a1c2e 3949out_free:
bf118a34
AA		 3950 for (i = 0; i < npages; i++)
3951 if (pages[i])
3952 __free_page(pages[i]);
331818f1
TM		 3953 if (res.acl_scratch)
3954 __free_page(res.acl_scratch);
aa1870af
BF		 3955 return ret;
3956}
3957
16b4289c
TM		 3958static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3959{
3960 struct nfs4_exception exception = { };
3961 ssize_t ret;
3962 do {
3963 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3964 if (ret >= 0)
3965 break;
3966 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3967 } while (exception.retry);
3968 return ret;
3969}
3970
e50a1c2e
BF		 3971static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3972{
3973 struct nfs_server *server = NFS_SERVER(inode);
3974 int ret;
3975
3976 if (!nfs4_server_supports_acls(server))
3977 return -EOPNOTSUPP;
3978 ret = nfs_revalidate_inode(server, inode);
3979 if (ret < 0)
3980 return ret;
08a22b39
AK		 3981 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3982 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3983 ret = nfs4_read_cached_acl(inode, buf, buflen);
3984 if (ret != -ENOENT)
bf118a34
AA		 3985 /* -ENOENT is returned if there is no ACL or if there is an ACL
3986 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3987 return ret;
3988 return nfs4_get_acl_uncached(inode, buf, buflen);
3989}
3990
16b4289c 3991static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3992{
3993 struct nfs_server *server = NFS_SERVER(inode);
3994 struct page *pages[NFS4ACL_MAXPAGES];
3995 struct nfs_setaclargs arg = {
3996 .fh = NFS_FH(inode),
3997 .acl_pages = pages,
3998 .acl_len = buflen,
3999 };
73c403a9 4000 struct nfs_setaclres res;
4b580ee3
BF		 4001 struct rpc_message msg = {
4002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4003 .rpc_argp = &arg,
73c403a9 4004 .rpc_resp = &res,
4b580ee3 4005 };
21f498c2 4006 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4007 int ret, i;
4b580ee3
BF		 4008
4009 if (!nfs4_server_supports_acls(server))
4010 return -EOPNOTSUPP;
21f498c2
TM		 4011 if (npages > ARRAY_SIZE(pages))
4012 return -ERANGE;
e9e3d724
NH		 4013 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4014 if (i < 0)
4015 return i;
57ec14c5 4016 nfs4_inode_return_delegation(inode);
7c513058 4017 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4018
4019 /*
4020 * Free each page after tx, so the only ref left is
4021 * held by the network stack
4022 */
4023 for (; i > 0; i--)
4024 put_page(pages[i-1]);
4025
08a22b39
AK		 4026 /*
4027 * Acl update can result in inode attribute update.
4028 * so mark the attribute cache invalid.
4029 */
4030 spin_lock(&inode->i_lock);
4031 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4032 spin_unlock(&inode->i_lock);
f41f7418
TM		 4033 nfs_access_zap_cache(inode);
4034 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4035 return ret;
4036}
4037
16b4289c
TM		 4038static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4039{
4040 struct nfs4_exception exception = { };
4041 int err;
4042 do {
4043 err = nfs4_handle_exception(NFS_SERVER(inode),
4044 __nfs4_proc_set_acl(inode, buf, buflen),
4045 &exception);
4046 } while (exception.retry);
4047 return err;
4048}
4049
1da177e4 4050static int
aa5190d0 4051nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4052{
aa5190d0
TM		 4053 struct nfs_client *clp = server->nfs_client;
4054
4055 if (task->tk_status >= 0)
1da177e4
LT		 4056 return 0;
4057 switch(task->tk_status) {
a1d0b5ee 4058 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4059 case -NFS4ERR_ADMIN_REVOKED:
4060 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4061 if (state == NULL)
4062 break;
4063 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4064 case -NFS4ERR_OPENMODE:
4065 if (state == NULL)
4066 break;
0400a6b0
TM		 4067 nfs4_schedule_stateid_recovery(server, state);
4068 goto wait_on_recovery;
0ced63d1
TM		 4069 case -NFS4ERR_EXPIRED:
4070 if (state != NULL)
4071 nfs4_schedule_stateid_recovery(server, state);
1da177e4 4072 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4073 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4074 nfs4_schedule_lease_recovery(clp);
4075 goto wait_on_recovery;
4745e315
AA		 4076#if defined(CONFIG_NFS_V4_1)
4077 case -NFS4ERR_BADSESSION:
4078 case -NFS4ERR_BADSLOT:
4079 case -NFS4ERR_BAD_HIGH_SLOT:
4080 case -NFS4ERR_DEADSESSION:
4081 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4082 case -NFS4ERR_SEQ_FALSE_RETRY:
4083 case -NFS4ERR_SEQ_MISORDERED:
4084 dprintk("%s ERROR %d, Reset session\n", __func__,
4085 task->tk_status);
9f594791 4086 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4087 task->tk_status = 0;
4088 return -EAGAIN;
4089#endif /* CONFIG_NFS_V4_1 */
1da177e4 4090 case -NFS4ERR_DELAY:
aa5190d0 4091 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4092 case -NFS4ERR_GRACE:
2c643488 4093 case -EKEYEXPIRED:
1da177e4
LT		 4094 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4095 task->tk_status = 0;
4096 return -EAGAIN;
a8a4ae3a 4097 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4098 case -NFS4ERR_OLD_STATEID:
4099 task->tk_status = 0;
4100 return -EAGAIN;
4101 }
4102 task->tk_status = nfs4_map_errors(task->tk_status);
4103 return 0;
0400a6b0 4104wait_on_recovery:
a2c0b9e2 4105 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4106 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4107 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4108 task->tk_status = 0;
4109 return -EAGAIN;
1da177e4
LT		 4110}
4111
f092075d
CL		 4112static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4113 nfs4_verifier *bootverf)
cd93710e
CL		 4114{
4115 __be32 verf[2];
4116
2c820d9a
CL		 4117 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4118 /* An impossible timestamp guarantees this value
4119 * will never match a generated boot time. */
4120 verf[0] = 0;
4121 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4122 } else {
f092075d
CL		 4123 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4124 verf[0] = (__be32)nn->boot_time.tv_sec;
4125 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4126 }
cd93710e
CL		 4127 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4128}
4129
e984a55a
CL		 4130static unsigned int
4131nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4132 char *buf, size_t len)
4133{
4134 unsigned int result;
4135
4136 rcu_read_lock();
4137 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4138 clp->cl_ipaddr,
4139 rpc_peeraddr2str(clp->cl_rpcclient,
4140 RPC_DISPLAY_ADDR),
4141 rpc_peeraddr2str(clp->cl_rpcclient,
4142 RPC_DISPLAY_PROTO));
4143 rcu_read_unlock();
4144 return result;
4145}
4146
4147static unsigned int
4148nfs4_init_uniform_client_string(const struct nfs_client *clp,
4149 char *buf, size_t len)
4150{
6f2ea7f2
CL		 4151 char *nodename = clp->cl_rpcclient->cl_nodename;
4152
4153 if (nfs4_client_id_uniquifier[0] != '\0')
4154 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4155 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4156 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4157 nodename);
e984a55a
CL		 4158}
4159
6bbb4ae8
CL		 4160/**
4161 * nfs4_proc_setclientid - Negotiate client ID
4162 * @clp: state data structure
4163 * @program: RPC program for NFSv4 callback service
4164 * @port: IP port number for NFS4 callback service
4165 * @cred: RPC credential to use for this call
4166 * @res: where to place the result
4167 *
4168 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4169 */
bb8b27e5
TM		 4170int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4171 unsigned short port, struct rpc_cred *cred,
4172 struct nfs4_setclientid_res *res)
1da177e4
LT		 4173{
4174 nfs4_verifier sc_verifier;
4175 struct nfs4_setclientid setclientid = {
4176 .sc_verifier = &sc_verifier,
4177 .sc_prog = program,
f4eecd5d 4178 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4179 };
4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4182 .rpc_argp = &setclientid,
bb8b27e5 4183 .rpc_resp = res,
286d7d6a 4184 .rpc_cred = cred,
1da177e4 4185 };
6bbb4ae8 4186 int status;
1da177e4 4187
de734831 4188 /* nfs_client_id4 */
f092075d 4189 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4190 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4191 setclientid.sc_name_len =
4192 nfs4_init_uniform_client_string(clp,
4193 setclientid.sc_name,
4194 sizeof(setclientid.sc_name));
4195 else
4196 setclientid.sc_name_len =
4197 nfs4_init_nonuniform_client_string(clp,
4198 setclientid.sc_name,
4199 sizeof(setclientid.sc_name));
de734831 4200 /* cb_client4 */
e984a55a 4201 rcu_read_lock();
de734831 4202 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4203 sizeof(setclientid.sc_netid),
4204 rpc_peeraddr2str(clp->cl_rpcclient,
4205 RPC_DISPLAY_NETID));
de734831
CL		 4206 rcu_read_unlock();
4207 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4208 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4209 clp->cl_ipaddr, port >> 8, port & 255);
4210
6bbb4ae8
CL		 4211 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4212 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4213 setclientid.sc_name_len, setclientid.sc_name);
4214 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4215 dprintk("NFS reply setclientid: %d\n", status);
4216 return status;
1da177e4
LT		 4217}
4218
6bbb4ae8
CL		 4219/**
4220 * nfs4_proc_setclientid_confirm - Confirm client ID
4221 * @clp: state data structure
4222 * @res: result of a previous SETCLIENTID
4223 * @cred: RPC credential to use for this call
4224 *
4225 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4226 */
fd954ae1 4227int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4228 struct nfs4_setclientid_res *arg,
4229 struct rpc_cred *cred)
1da177e4
LT		 4230{
4231 struct nfs_fsinfo fsinfo;
4232 struct rpc_message msg = {
4233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4234 .rpc_argp = arg,
1da177e4 4235 .rpc_resp = &fsinfo,
286d7d6a 4236 .rpc_cred = cred,
1da177e4
LT		 4237 };
4238 unsigned long now;
4239 int status;
4240
6bbb4ae8
CL		 4241 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4242 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4243 clp->cl_clientid);
1da177e4 4244 now = jiffies;
1bd714f2 4245 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4246 if (status == 0) {
4247 spin_lock(&clp->cl_lock);
4248 clp->cl_lease_time = fsinfo.lease_time * HZ;
4249 clp->cl_last_renewal = now;
4250 spin_unlock(&clp->cl_lock);
4251 }
6bbb4ae8 4252 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4253 return status;
4254}
4255
fe650407
TM		 4256struct nfs4_delegreturndata {
4257 struct nfs4_delegreturnargs args;
fa178f29 4258 struct nfs4_delegreturnres res;
fe650407
TM		 4259 struct nfs_fh fh;
4260 nfs4_stateid stateid;
26e976a8 4261 unsigned long timestamp;
fa178f29 4262 struct nfs_fattr fattr;
fe650407
TM		 4263 int rpc_status;
4264};
4265
fe650407
TM		 4266static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4267{
4268 struct nfs4_delegreturndata *data = calldata;
938e1010 4269
14516c3a
TM		 4270 if (!nfs4_sequence_done(task, &data->res.seq_res))
4271 return;
938e1010 4272
79708861
RL		 4273 switch (task->tk_status) {
4274 case -NFS4ERR_STALE_STATEID:
4275 case -NFS4ERR_EXPIRED:
4276 case 0:
fa178f29 4277 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4278 break;
4279 default:
4280 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4281 -EAGAIN) {
d00c5d43 4282 rpc_restart_call_prepare(task);
79708861
RL		 4283 return;
4284 }
4285 }
4286 data->rpc_status = task->tk_status;
fe650407
TM		 4287}
4288
4289static void nfs4_delegreturn_release(void *calldata)
4290{
fe650407
TM		 4291 kfree(calldata);
4292}
4293
938e1010
AA		 4294#if defined(CONFIG_NFS_V4_1)
4295static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4296{
4297 struct nfs4_delegreturndata *d_data;
4298
4299 d_data = (struct nfs4_delegreturndata *)data;
4300
035168ab 4301 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4302 &d_data->args.seq_args,
9d12b216 4303 &d_data->res.seq_res, task))
938e1010
AA		 4304 return;
4305 rpc_call_start(task);
4306}
4307#endif /* CONFIG_NFS_V4_1 */
4308
c8d149f3 4309static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4310#if defined(CONFIG_NFS_V4_1)
4311 .rpc_call_prepare = nfs4_delegreturn_prepare,
4312#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4313 .rpc_call_done = nfs4_delegreturn_done,
4314 .rpc_release = nfs4_delegreturn_release,
4315};
4316
e6f81075 4317static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4318{
4319 struct nfs4_delegreturndata *data;
fa178f29 4320 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4321 struct rpc_task *task;
5138fde0
TM		 4322 struct rpc_message msg = {
4323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4324 .rpc_cred = cred,
4325 };
c970aa85
TM		 4326 struct rpc_task_setup task_setup_data = {
4327 .rpc_client = server->client,
5138fde0 4328 .rpc_message = &msg,
c970aa85
TM		 4329 .callback_ops = &nfs4_delegreturn_ops,
4330 .flags = RPC_TASK_ASYNC,
4331 };
e6f81075 4332 int status = 0;
fe650407 4333
8535b2be 4334 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4335 if (data == NULL)
4336 return -ENOMEM;
9d12b216 4337 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4338 data->args.fhandle = &data->fh;
4339 data->args.stateid = &data->stateid;
9e907fec 4340 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4341 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4342 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4343 data->res.fattr = &data->fattr;
4344 data->res.server = server;
5138fde0 4345 nfs_fattr_init(data->res.fattr);
26e976a8 4346 data->timestamp = jiffies;
fe650407
TM		 4347 data->rpc_status = 0;
4348
c970aa85 4349 task_setup_data.callback_data = data;
1174dd1f
TM		 4350 msg.rpc_argp = &data->args;
4351 msg.rpc_resp = &data->res;
c970aa85 4352 task = rpc_run_task(&task_setup_data);
7a1218a2 4353 if (IS_ERR(task))
fe650407 4354 return PTR_ERR(task);
e6f81075
TM		 4355 if (!issync)
4356 goto out;
fe650407 4357 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4358 if (status != 0)
4359 goto out;
4360 status = data->rpc_status;
e144cbcc
TM		 4361 if (status == 0)
4362 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4363 else
4364 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4365out:
e6b3c4db 4366 rpc_put_task(task);
fe650407 4367 return status;
1da177e4
LT		 4368}
4369
e6f81075 4370int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4371{
4372 struct nfs_server *server = NFS_SERVER(inode);
4373 struct nfs4_exception exception = { };
4374 int err;
4375 do {
e6f81075 4376 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4377 switch (err) {
4378 case -NFS4ERR_STALE_STATEID:
4379 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4380 case 0:
4381 return 0;
4382 }
4383 err = nfs4_handle_exception(server, err, &exception);
4384 } while (exception.retry);
4385 return err;
4386}
4387
4388#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4389#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4390
4391/*
4392 * sleep, with exponential backoff, and retry the LOCK operation.
4393 */
4394static unsigned long
4395nfs4_set_lock_task_retry(unsigned long timeout)
4396{
d310310c 4397 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4398 timeout <<= 1;
4399 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4400 return NFS4_LOCK_MAXTIMEOUT;
4401 return timeout;
4402}
4403
1da177e4
LT		 4404static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4405{
4406 struct inode *inode = state->inode;
4407 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4408 struct nfs_client *clp = server->nfs_client;
911d1aaf 4409 struct nfs_lockt_args arg = {
1da177e4 4410 .fh = NFS_FH(inode),
911d1aaf 4411 .fl = request,
1da177e4 4412 };
911d1aaf
TM		 4413 struct nfs_lockt_res res = {
4414 .denied = request,
1da177e4
LT		 4415 };
4416 struct rpc_message msg = {
4417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4418 .rpc_argp = &arg,
4419 .rpc_resp = &res,
4420 .rpc_cred = state->owner->so_cred,
4421 };
1da177e4
LT		 4422 struct nfs4_lock_state *lsp;
4423 int status;
4424
911d1aaf 4425 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4426 status = nfs4_set_lock_state(state, request);
4427 if (status != 0)
4428 goto out;
4429 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4430 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4431 arg.lock_owner.s_dev = server->s_dev;
7c513058 4432 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4433 switch (status) {
4434 case 0:
4435 request->fl_type = F_UNLCK;
4436 break;
4437 case -NFS4ERR_DENIED:
4438 status = 0;
1da177e4 4439 }
70cc6487 4440 request->fl_ops->fl_release_private(request);
8d0a8a9d 4441out:
1da177e4
LT		 4442 return status;
4443}
4444
4445static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4446{
4447 struct nfs4_exception exception = { };
4448 int err;
4449
4450 do {
4451 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4452 _nfs4_proc_getlk(state, cmd, request),
4453 &exception);
4454 } while (exception.retry);
4455 return err;
4456}
4457
4458static int do_vfs_lock(struct file *file, struct file_lock *fl)
4459{
4460 int res = 0;
4461 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4462 case FL_POSIX:
4463 res = posix_lock_file_wait(file, fl);
4464 break;
4465 case FL_FLOCK:
4466 res = flock_lock_file_wait(file, fl);
4467 break;
4468 default:
4469 BUG();
4470 }
1da177e4
LT		 4471 return res;
4472}
4473
faf5f49c 4474struct nfs4_unlockdata {
911d1aaf
TM		 4475 struct nfs_locku_args arg;
4476 struct nfs_locku_res res;
faf5f49c
TM		 4477 struct nfs4_lock_state *lsp;
4478 struct nfs_open_context *ctx;
911d1aaf
TM		 4479 struct file_lock fl;
4480 const struct nfs_server *server;
26e976a8 4481 unsigned long timestamp;
faf5f49c
TM		 4482};
4483
911d1aaf
TM		 4484static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4485 struct nfs_open_context *ctx,
4486 struct nfs4_lock_state *lsp,
4487 struct nfs_seqid *seqid)
4488{
4489 struct nfs4_unlockdata *p;
4490 struct inode *inode = lsp->ls_state->inode;
4491
8535b2be 4492 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4493 if (p == NULL)
4494 return NULL;
4495 p->arg.fh = NFS_FH(inode);
4496 p->arg.fl = &p->fl;
4497 p->arg.seqid = seqid;
c1d51931 4498 p->res.seqid = seqid;
911d1aaf
TM		 4499 p->arg.stateid = &lsp->ls_stateid;
4500 p->lsp = lsp;
4501 atomic_inc(&lsp->ls_count);
4502 /* Ensure we don't close file until we're done freeing locks! */
4503 p->ctx = get_nfs_open_context(ctx);
4504 memcpy(&p->fl, fl, sizeof(p->fl));
4505 p->server = NFS_SERVER(inode);
4506 return p;
4507}
4508
06f814a3 4509static void nfs4_locku_release_calldata(void *data)
faf5f49c 4510{
963d8fe5 4511 struct nfs4_unlockdata *calldata = data;
911d1aaf 4512 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4513 nfs4_put_lock_state(calldata->lsp);
4514 put_nfs_open_context(calldata->ctx);
4515 kfree(calldata);
faf5f49c
TM		 4516}
4517
963d8fe5 4518static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4519{
963d8fe5 4520 struct nfs4_unlockdata *calldata = data;
faf5f49c 4521
14516c3a
TM		 4522 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4523 return;
faf5f49c
TM		 4524 switch (task->tk_status) {
4525 case 0:
f597c537
TM		 4526 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4527 &calldata->res.stateid);
26e976a8 4528 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4529 break;
9e33bed5
TM		 4530 case -NFS4ERR_BAD_STATEID:
4531 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4532 case -NFS4ERR_STALE_STATEID:
4533 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4534 break;
4535 default:
9e33bed5 4536 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4537 rpc_restart_call_prepare(task);
faf5f49c 4538 }
2b1bc308 4539 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4540}
4541
4ce70ada 4542static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4543{
4ce70ada 4544 struct nfs4_unlockdata *calldata = data;
faf5f49c 4545
911d1aaf 4546 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4547 return;
795a88c9 4548 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4549 /* Note: exit _without_ running nfs4_locku_done */
4550 task->tk_action = NULL;
faf5f49c
TM		 4551 return;
4552 }
26e976a8 4553 calldata->timestamp = jiffies;
035168ab 4554 if (nfs4_setup_sequence(calldata->server,
a893693c 4555 &calldata->arg.seq_args,
2240a9e2
TM		 4556 &calldata->res.seq_res,
4557 task) != 0)
4558 nfs_release_seqid(calldata->arg.seqid);
4559 else
4560 rpc_call_start(task);
faf5f49c
TM		 4561}
4562
963d8fe5 4563static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4564 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4565 .rpc_call_done = nfs4_locku_done,
06f814a3 4566 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4567};
4568
a5d16a4d
TM		 4569static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4570 struct nfs_open_context *ctx,
4571 struct nfs4_lock_state *lsp,
4572 struct nfs_seqid *seqid)
4573{
4574 struct nfs4_unlockdata *data;
5138fde0
TM		 4575 struct rpc_message msg = {
4576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4577 .rpc_cred = ctx->cred,
4578 };
c970aa85
TM		 4579 struct rpc_task_setup task_setup_data = {
4580 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4581 .rpc_message = &msg,
c970aa85 4582 .callback_ops = &nfs4_locku_ops,
101070ca 4583 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4584 .flags = RPC_TASK_ASYNC,
4585 };
a5d16a4d 4586
137d6aca
FF		 4587 /* Ensure this is an unlock - when canceling a lock, the
4588 * canceled lock is passed in, and it won't be an unlock.
4589 */
4590 fl->fl_type = F_UNLCK;
4591
a5d16a4d
TM		 4592 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4593 if (data == NULL) {
4594 nfs_free_seqid(seqid);
4595 return ERR_PTR(-ENOMEM);
4596 }
4597
9d12b216 4598 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4599 msg.rpc_argp = &data->arg;
4600 msg.rpc_resp = &data->res;
c970aa85
TM		 4601 task_setup_data.callback_data = data;
4602 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4603}
4604
faf5f49c
TM		 4605static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4606{
19e03c57 4607 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4608 struct nfs_seqid *seqid;
1da177e4 4609 struct nfs4_lock_state *lsp;
06f814a3
TM		 4610 struct rpc_task *task;
4611 int status = 0;
536ff0f8 4612 unsigned char fl_flags = request->fl_flags;
faf5f49c 4613
8d0a8a9d 4614 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4615 /* Unlock _before_ we do the RPC call */
4616 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4617 down_read(&nfsi->rwsem);
4618 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4619 up_read(&nfsi->rwsem);
9b073574 4620 goto out;
19e03c57
TM		 4621 }
4622 up_read(&nfsi->rwsem);
8d0a8a9d 4623 if (status != 0)
9b073574
TM		 4624 goto out;
4625 /* Is this a delegated lock? */
4626 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4627 goto out;
8d0a8a9d 4628 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4629 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4630 status = -ENOMEM;
911d1aaf 4631 if (seqid == NULL)
9b073574 4632 goto out;
cd3758e3 4633 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4634 status = PTR_ERR(task);
4635 if (IS_ERR(task))
9b073574 4636 goto out;
a5d16a4d 4637 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4638 rpc_put_task(task);
9b073574 4639out:
536ff0f8 4640 request->fl_flags = fl_flags;
1da177e4
LT		 4641 return status;
4642}
4643
a5d16a4d
TM		 4644struct nfs4_lockdata {
4645 struct nfs_lock_args arg;
4646 struct nfs_lock_res res;
4647 struct nfs4_lock_state *lsp;
4648 struct nfs_open_context *ctx;
4649 struct file_lock fl;
26e976a8 4650 unsigned long timestamp;
a5d16a4d
TM		 4651 int rpc_status;
4652 int cancelled;
66179efe 4653 struct nfs_server *server;
a5d16a4d
TM		 4654};
4655
4656static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4657 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4658 gfp_t gfp_mask)
1da177e4 4659{
a5d16a4d
TM		 4660 struct nfs4_lockdata *p;
4661 struct inode *inode = lsp->ls_state->inode;
1da177e4 4662 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4663
8535b2be 4664 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4665 if (p == NULL)
4666 return NULL;
4667
4668 p->arg.fh = NFS_FH(inode);
4669 p->arg.fl = &p->fl;
8535b2be 4670 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4671 if (p->arg.open_seqid == NULL)
4672 goto out_free;
8535b2be 4673 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4674 if (p->arg.lock_seqid == NULL)
2f74c0a0 4675 goto out_free_seqid;
a5d16a4d 4676 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4677 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4678 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4679 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4680 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4681 p->lsp = lsp;
66179efe 4682 p->server = server;
a5d16a4d
TM		 4683 atomic_inc(&lsp->ls_count);
4684 p->ctx = get_nfs_open_context(ctx);
4685 memcpy(&p->fl, fl, sizeof(p->fl));
4686 return p;
2f74c0a0
TM		 4687out_free_seqid:
4688 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4689out_free:
4690 kfree(p);
4691 return NULL;
4692}
4693
4694static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4695{
4696 struct nfs4_lockdata *data = calldata;
4697 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4698
3110ff80 4699 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4700 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4701 return;
a5d16a4d
TM		 4702 /* Do we need to do an open_to_lock_owner? */
4703 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970 4704 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
2240a9e2 4705 goto out_release_lock_seqid;
a5d16a4d
TM		 4706 data->arg.open_stateid = &state->stateid;
4707 data->arg.new_lock_owner = 1;
c1d51931 4708 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4709 } else
4710 data->arg.new_lock_owner = 0;
26e976a8 4711 data->timestamp = jiffies;
035168ab
TM		 4712 if (nfs4_setup_sequence(data->server,
4713 &data->arg.seq_args,
2240a9e2
TM		 4714 &data->res.seq_res,
4715 task) == 0) {
4716 rpc_call_start(task);
66179efe 4717 return;
2240a9e2
TM		 4718 }
4719 nfs_release_seqid(data->arg.open_seqid);
4720out_release_lock_seqid:
4721 nfs_release_seqid(data->arg.lock_seqid);
4722 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
a5d16a4d
TM		 4723}
4724
b257957e
AB		 4725static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4726{
4727 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4728 nfs4_lock_prepare(task, calldata);
4729}
4730
a5d16a4d
TM		 4731static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4732{
4733 struct nfs4_lockdata *data = calldata;
4734
3110ff80 4735 dprintk("%s: begin!\n", __func__);
a5d16a4d 4736
14516c3a
TM		 4737 if (!nfs4_sequence_done(task, &data->res.seq_res))
4738 return;
66179efe 4739
a5d16a4d 4740 data->rpc_status = task->tk_status;
a5d16a4d 4741 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4742 if (data->rpc_status == 0)
4743 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4744 else
4745 goto out;
4746 }
4747 if (data->rpc_status == 0) {
f597c537 4748 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4749 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4750 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4751 }
a5d16a4d 4752out:
3110ff80 4753 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4754}
4755
4756static void nfs4_lock_release(void *calldata)
4757{
4758 struct nfs4_lockdata *data = calldata;
4759
3110ff80 4760 dprintk("%s: begin!\n", __func__);
2f74c0a0 4761 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4762 if (data->cancelled != 0) {
4763 struct rpc_task *task;
4764 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4765 data->arg.lock_seqid);
4766 if (!IS_ERR(task))
bf294b41 4767 rpc_put_task_async(task);
3110ff80 4768 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4769 } else
4770 nfs_free_seqid(data->arg.lock_seqid);
4771 nfs4_put_lock_state(data->lsp);
4772 put_nfs_open_context(data->ctx);
4773 kfree(data);
3110ff80 4774 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4775}
4776
4777static const struct rpc_call_ops nfs4_lock_ops = {
4778 .rpc_call_prepare = nfs4_lock_prepare,
4779 .rpc_call_done = nfs4_lock_done,
4780 .rpc_release = nfs4_lock_release,
4781};
4782
b257957e
AB		 4783static const struct rpc_call_ops nfs4_recover_lock_ops = {
4784 .rpc_call_prepare = nfs4_recover_lock_prepare,
4785 .rpc_call_done = nfs4_lock_done,
4786 .rpc_release = nfs4_lock_release,
4787};
4788
2bee72a6
TM		 4789static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4790{
2bee72a6
TM		 4791 switch (error) {
4792 case -NFS4ERR_ADMIN_REVOKED:
4793 case -NFS4ERR_BAD_STATEID:
ecac799a 4794 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4795 if (new_lock_owner != 0 ||
795a88c9 4796 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4797 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4798 break;
4799 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4800 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4801 case -NFS4ERR_EXPIRED:
4802 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4803 };
4804}
4805
afe6c27c 4806static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4807{
4808 struct nfs4_lockdata *data;
4809 struct rpc_task *task;
5138fde0
TM		 4810 struct rpc_message msg = {
4811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4812 .rpc_cred = state->owner->so_cred,
4813 };
c970aa85
TM		 4814 struct rpc_task_setup task_setup_data = {
4815 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4816 .rpc_message = &msg,
c970aa85 4817 .callback_ops = &nfs4_lock_ops,
101070ca 4818 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4819 .flags = RPC_TASK_ASYNC,
4820 };
a5d16a4d
TM		 4821 int ret;
4822
3110ff80 4823 dprintk("%s: begin!\n", __func__);
cd3758e3 4824 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4825 fl->fl_u.nfs4_fl.owner,
4826 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4827 if (data == NULL)
4828 return -ENOMEM;
4829 if (IS_SETLKW(cmd))
4830 data->arg.block = 1;
b257957e
AB		 4831 if (recovery_type > NFS_LOCK_NEW) {
4832 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4833 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4834 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4835 }
9d12b216 4836 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4837 msg.rpc_argp = &data->arg;
4838 msg.rpc_resp = &data->res;
c970aa85
TM		 4839 task_setup_data.callback_data = data;
4840 task = rpc_run_task(&task_setup_data);
7a1218a2 4841 if (IS_ERR(task))
a5d16a4d 4842 return PTR_ERR(task);
a5d16a4d
TM		 4843 ret = nfs4_wait_for_completion_rpc_task(task);
4844 if (ret == 0) {
4845 ret = data->rpc_status;
2bee72a6
TM		 4846 if (ret)
4847 nfs4_handle_setlk_error(data->server, data->lsp,
4848 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4849 } else
4850 data->cancelled = 1;
e6b3c4db 4851 rpc_put_task(task);
3110ff80 4852 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4853 return ret;
1da177e4
LT		 4854}
4855
4856static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4857{
202b50dc 4858 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4859 struct nfs4_exception exception = {
4860 .inode = state->inode,
4861 };
202b50dc
TM		 4862 int err;
4863
4864 do {
42a2d13e
TM		 4865 /* Cache the lock if possible... */
4866 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4867 return 0;
afe6c27c 4868 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4869 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4870 break;
4871 nfs4_handle_exception(server, err, &exception);
4872 } while (exception.retry);
4873 return err;
1da177e4
LT		 4874}
4875
4876static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4877{
202b50dc 4878 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4879 struct nfs4_exception exception = {
4880 .inode = state->inode,
4881 };
202b50dc
TM		 4882 int err;
4883
6bfc93ef
TM		 4884 err = nfs4_set_lock_state(state, request);
4885 if (err != 0)
4886 return err;
202b50dc 4887 do {
42a2d13e
TM		 4888 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4889 return 0;
afe6c27c 4890 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4891 switch (err) {
4892 default:
4893 goto out;
4894 case -NFS4ERR_GRACE:
4895 case -NFS4ERR_DELAY:
4896 nfs4_handle_exception(server, err, &exception);
4897 err = 0;
4898 }
202b50dc 4899 } while (exception.retry);
a9ed2e25 4900out:
202b50dc 4901 return err;
1da177e4
LT		 4902}
4903
f062eb6c 4904#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4905/**
4906 * nfs41_check_expired_locks - possibly free a lock stateid
4907 *
4908 * @state: NFSv4 state for an inode
4909 *
4910 * Returns NFS_OK if recovery for this stateid is now finished.
4911 * Otherwise a negative NFS4ERR value is returned.
4912 */
b01dd1d8 4913static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4914{
eb64cf96 4915 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4916 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4917 struct nfs_server *server = NFS_SERVER(state->inode);
4918
b01dd1d8 4919 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4920 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4921 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4922 if (status != NFS_OK) {
3e60ffdd
CL		 4923 /* Free the stateid unless the server
4924 * informs us the stateid is unrecognized. */
89af2739
CL		 4925 if (status != -NFS4ERR_BAD_STATEID)
4926 nfs41_free_stateid(server,
4927 &lsp->ls_stateid);
795a88c9 4928 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4929 ret = status;
4930 }
4931 }
4932 };
4933
4934 return ret;
4935}
4936
4937static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4938{
4939 int status = NFS_OK;
4940
4941 if (test_bit(LK_STATE_IN_USE, &state->flags))
4942 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4943 if (status != NFS_OK)
4944 status = nfs4_lock_expired(state, request);
4945 return status;
f062eb6c
BS		 4946}
4947#endif
4948
1da177e4
LT		 4949static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4950{
19e03c57 4951 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4952 unsigned char fl_flags = request->fl_flags;
8e469ebd 4953 int status = -ENOLCK;
1da177e4 4954
8e469ebd
TM		 4955 if ((fl_flags & FL_POSIX) &&
4956 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4957 goto out;
6bfc93ef 4958 /* Is this a delegated open? */
6bfc93ef
TM		 4959 status = nfs4_set_lock_state(state, request);
4960 if (status != 0)
4961 goto out;
01c3b861
TM		 4962 request->fl_flags |= FL_ACCESS;
4963 status = do_vfs_lock(request->fl_file, request);
4964 if (status < 0)
4965 goto out;
19e03c57 4966 down_read(&nfsi->rwsem);
01c3b861 4967 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4968 /* Yes: cache locks! */
01c3b861 4969 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4970 request->fl_flags = fl_flags & ~FL_SLEEP;
4971 status = do_vfs_lock(request->fl_file, request);
4972 goto out_unlock;
01c3b861 4973 }
afe6c27c 4974 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4975 if (status != 0)
01c3b861 4976 goto out_unlock;
6bfc93ef 4977 /* Note: we always want to sleep here! */
01c3b861 4978 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4979 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4980 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4981 "manager!\n", __func__);
01c3b861 4982out_unlock:
19e03c57 4983 up_read(&nfsi->rwsem);
01c3b861
TM		 4984out:
4985 request->fl_flags = fl_flags;
1da177e4
LT		 4986 return status;
4987}
4988
4989static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4990{
a1d0b5ee
TM		 4991 struct nfs4_exception exception = {
4992 .state = state,
05ffe24f 4993 .inode = state->inode,
a1d0b5ee 4994 };
1da177e4
LT		 4995 int err;
4996
4997 do {
965b5d67
TM		 4998 err = _nfs4_proc_setlk(state, cmd, request);
4999 if (err == -NFS4ERR_DENIED)
5000 err = -EAGAIN;
1da177e4 5001 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5002 err, &exception);
1da177e4
LT		 5003 } while (exception.retry);
5004 return err;
5005}
5006
5007static int
5008nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5009{
5010 struct nfs_open_context *ctx;
5011 struct nfs4_state *state;
5012 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5013 int status;
5014
5015 /* verify open state */
cd3758e3 5016 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5017 state = ctx->state;
5018
5019 if (request->fl_start < 0 || request->fl_end < 0)
5020 return -EINVAL;
5021
d953126a
TM		 5022 if (IS_GETLK(cmd)) {
5023 if (state != NULL)
5024 return nfs4_proc_getlk(state, F_GETLK, request);
5025 return 0;
5026 }
1da177e4
LT		 5027
5028 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5029 return -EINVAL;
5030
d953126a
TM		 5031 if (request->fl_type == F_UNLCK) {
5032 if (state != NULL)
5033 return nfs4_proc_unlck(state, cmd, request);
5034 return 0;
5035 }
1da177e4 5036
d953126a
TM		 5037 if (state == NULL)
5038 return -ENOLCK;
55725513
TM		 5039 /*
5040 * Don't rely on the VFS having checked the file open mode,
5041 * since it won't do this for flock() locks.
5042 */
f44106e2 5043 switch (request->fl_type) {
55725513
TM		 5044 case F_RDLCK:
5045 if (!(filp->f_mode & FMODE_READ))
5046 return -EBADF;
5047 break;
5048 case F_WRLCK:
5049 if (!(filp->f_mode & FMODE_WRITE))
5050 return -EBADF;
5051 }
5052
1da177e4
LT		 5053 do {
5054 status = nfs4_proc_setlk(state, cmd, request);
5055 if ((status != -EAGAIN) || IS_SETLK(cmd))
5056 break;
5057 timeout = nfs4_set_lock_task_retry(timeout);
5058 status = -ERESTARTSYS;
5059 if (signalled())
5060 break;
5061 } while(status < 0);
1da177e4
LT		 5062 return status;
5063}
5064
888e694c
TM		 5065int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5066{
5067 struct nfs_server *server = NFS_SERVER(state->inode);
5068 struct nfs4_exception exception = { };
5069 int err;
5070
5071 err = nfs4_set_lock_state(state, fl);
5072 if (err != 0)
5073 goto out;
5074 do {
afe6c27c 5075 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5076 switch (err) {
5077 default:
a030889a
WAA		 5078 printk(KERN_ERR "NFS: %s: unhandled error "
5079 "%d.\n", __func__, err);
d5122201 5080 case 0:
965b5d67 5081 case -ESTALE:
d5122201
TM		 5082 goto out;
5083 case -NFS4ERR_EXPIRED:
0ced63d1 5084 nfs4_schedule_stateid_recovery(server, state);
d5122201 5085 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5086 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 5087 nfs4_schedule_lease_recovery(server->nfs_client);
5088 goto out;
74e7bb73
RL		 5089 case -NFS4ERR_BADSESSION:
5090 case -NFS4ERR_BADSLOT:
5091 case -NFS4ERR_BAD_HIGH_SLOT:
5092 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5093 case -NFS4ERR_DEADSESSION:
9f594791 5094 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 5095 goto out;
965b5d67
TM		 5096 case -ERESTARTSYS:
5097 /*
5098 * The show must go on: exit, but mark the
5099 * stateid as needing recovery.
5100 */
a1d0b5ee 5101 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5102 case -NFS4ERR_ADMIN_REVOKED:
5103 case -NFS4ERR_BAD_STATEID:
5104 case -NFS4ERR_OPENMODE:
0400a6b0 5105 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5106 err = 0;
5107 goto out;
168667c4
TM		 5108 case -EKEYEXPIRED:
5109 /*
5110 * User RPCSEC_GSS context has expired.
5111 * We cannot recover this stateid now, so
5112 * skip it and allow recovery thread to
5113 * proceed.
5114 */
5115 err = 0;
5116 goto out;
965b5d67
TM		 5117 case -ENOMEM:
5118 case -NFS4ERR_DENIED:
5119 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5120 err = 0;
5121 goto out;
d5122201
TM		 5122 case -NFS4ERR_DELAY:
5123 break;
5124 }
888e694c
TM		 5125 err = nfs4_handle_exception(server, err, &exception);
5126 } while (exception.retry);
5127out:
5128 return err;
5129}
6b3b5496 5130
cf470c3e
TM		 5131struct nfs_release_lockowner_data {
5132 struct nfs4_lock_state *lsp;
5ae67c4f 5133 struct nfs_server *server;
cf470c3e
TM		 5134 struct nfs_release_lockowner_args args;
5135};
5136
d3c7b7cc
TM		 5137static void nfs4_release_lockowner_release(void *calldata)
5138{
cf470c3e 5139 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5140 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5141 kfree(calldata);
5142}
5143
17280175 5144static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5145 .rpc_release = nfs4_release_lockowner_release,
5146};
5147
cf470c3e 5148int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5149{
5150 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5151 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5152 struct rpc_message msg = {
5153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5154 };
5155
5156 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5157 return -EINVAL;
5158 data = kmalloc(sizeof(*data), GFP_NOFS);
5159 if (!data)
5160 return -ENOMEM;
5161 data->lsp = lsp;
5ae67c4f 5162 data->server = server;
cf470c3e
TM		 5163 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5164 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5165 data->args.lock_owner.s_dev = server->s_dev;
5166 msg.rpc_argp = &data->args;
5167 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5168 return 0;
d3c7b7cc
TM		 5169}
5170
aa1870af
BF		 5171#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5172
64c2ce8b
AK		 5173static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5174 const void *buf, size_t buflen,
5175 int flags, int type)
6b3b5496 5176{
64c2ce8b
AK		 5177 if (strcmp(key, "") != 0)
5178 return -EINVAL;
4b580ee3 5179
64c2ce8b 5180 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5181}
5182
64c2ce8b
AK		 5183static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5184 void *buf, size_t buflen, int type)
6b3b5496 5185{
64c2ce8b
AK		 5186 if (strcmp(key, "") != 0)
5187 return -EINVAL;
aa1870af 5188
64c2ce8b 5189 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5190}
5191
64c2ce8b
AK		 5192static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5193 size_t list_len, const char *name,
5194 size_t name_len, int type)
6b3b5496 5195{
64c2ce8b 5196 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5197
096455a2
BF		 5198 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5199 return 0;
64c2ce8b
AK		 5200
5201 if (list && len <= list_len)
5202 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5203 return len;
6b3b5496
BF		 5204}
5205
533eb461
AA		 5206/*
5207 * nfs_fhget will use either the mounted_on_fileid or the fileid
5208 */
69aaaae1
TM		 5209static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5210{
533eb461
AA		 5211 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5212 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5213 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5214 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5215 return;
5216
5217 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5218 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5219 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5220 fattr->nlink = 2;
5221}
5222
f05d147f
BS		 5223static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5224 const struct qstr *name,
5225 struct nfs4_fs_locations *fs_locations,
5226 struct page *page)
683b57b4
TM		 5227{
5228 struct nfs_server *server = NFS_SERVER(dir);
5229 u32 bitmask[2] = {
361e624f 5230 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5231 };
5232 struct nfs4_fs_locations_arg args = {
5233 .dir_fh = NFS_FH(dir),
c228fd3a 5234 .name = name,
683b57b4
TM		 5235 .page = page,
5236 .bitmask = bitmask,
5237 };
22958463
BH		 5238 struct nfs4_fs_locations_res res = {
5239 .fs_locations = fs_locations,
5240 };
683b57b4
TM		 5241 struct rpc_message msg = {
5242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5243 .rpc_argp = &args,
22958463 5244 .rpc_resp = &res,
683b57b4
TM		 5245 };
5246 int status;
5247
3110ff80 5248 dprintk("%s: start\n", __func__);
533eb461
AA		 5249
5250 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5251 * is not supported */
5252 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5253 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5254 else
5255 bitmask[0] |= FATTR4_WORD0_FILEID;
5256
c228fd3a 5257 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5258 fs_locations->server = server;
830b8e33 5259 fs_locations->nlocations = 0;
f05d147f 5260 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5261 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5262 return status;
5263}
5264
f05d147f
BS		 5265int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5266 const struct qstr *name,
5267 struct nfs4_fs_locations *fs_locations,
5268 struct page *page)
db0a9593
BS		 5269{
5270 struct nfs4_exception exception = { };
5271 int err;
5272 do {
5273 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5274 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5275 &exception);
5276 } while (exception.retry);
5277 return err;
5278}
5279
5a5ea0d4
BS		 5280static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5281{
5282 int status;
5283 struct nfs4_secinfo_arg args = {
5284 .dir_fh = NFS_FH(dir),
5285 .name = name,
5286 };
5287 struct nfs4_secinfo_res res = {
5288 .flavors = flavors,
5289 };
5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5292 .rpc_argp = &args,
5293 .rpc_resp = &res,
5294 };
5295
5296 dprintk("NFS call secinfo %s\n", name->name);
5297 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5298 dprintk("NFS reply secinfo: %d\n", status);
5299 return status;
5300}
5301
72de53ec
BS		 5302int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5303 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5304{
5305 struct nfs4_exception exception = { };
5306 int err;
5307 do {
5308 err = nfs4_handle_exception(NFS_SERVER(dir),
5309 _nfs4_proc_secinfo(dir, name, flavors),
5310 &exception);
5311 } while (exception.retry);
5312 return err;
5313}
5314
557134a3 5315#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5316/*
5317 * Check the exchange flags returned by the server for invalid flags, having
5318 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5319 * DS flags set.
5320 */
5321static int nfs4_check_cl_exchange_flags(u32 flags)
5322{
5323 if (flags & ~EXCHGID4_FLAG_MASK_R)
5324 goto out_inval;
5325 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5326 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5327 goto out_inval;
5328 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5329 goto out_inval;
5330 return NFS_OK;
5331out_inval:
5332 return -NFS4ERR_INVAL;
5333}
5334
78fe0f41 5335static bool
79d4e1f0
CL		 5336nfs41_same_server_scope(struct nfs41_server_scope *a,
5337 struct nfs41_server_scope *b)
78fe0f41
WAA		 5338{
5339 if (a->server_scope_sz == b->server_scope_sz &&
5340 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5341 return true;
5342
5343 return false;
5344}
5345
7c44f1ae
WAA		 5346/*
5347 * nfs4_proc_bind_conn_to_session()
5348 *
5349 * The 4.1 client currently uses the same TCP connection for the
5350 * fore and backchannel.
5351 */
2cf047c9 5352int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5353{
5354 int status;
5355 struct nfs41_bind_conn_to_session_res res;
5356 struct rpc_message msg = {
5357 .rpc_proc =
5358 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5359 .rpc_argp = clp,
5360 .rpc_resp = &res,
2cf047c9 5361 .rpc_cred = cred,
7c44f1ae
WAA		 5362 };
5363
5364 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5365
5366 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5367 if (unlikely(res.session == NULL)) {
5368 status = -ENOMEM;
5369 goto out;
5370 }
5371
5372 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5373 if (status == 0) {
5374 if (memcmp(res.session->sess_id.data,
5375 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5376 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5377 status = -EIO;
5378 goto out_session;
5379 }
5380 if (res.dir != NFS4_CDFS4_BOTH) {
5381 dprintk("NFS: %s: Unexpected direction from server\n",
5382 __func__);
5383 status = -EIO;
5384 goto out_session;
5385 }
5386 if (res.use_conn_in_rdma_mode) {
5387 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5388 __func__);
5389 status = -EIO;
5390 goto out_session;
5391 }
5392 }
5393out_session:
5394 kfree(res.session);
5395out:
5396 dprintk("<-- %s status= %d\n", __func__, status);
5397 return status;
5398}
5399
99fe60d0
BH		 5400/*
5401 * nfs4_proc_exchange_id()
5402 *
6bbb4ae8
CL		 5403 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5404 *
99fe60d0
BH		 5405 * Since the clientid has expired, all compounds using sessions
5406 * associated with the stale clientid will be returning
5407 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5408 * be in some phase of session reset.
5409 */
4d643d1d 5410int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5411{
5412 nfs4_verifier verifier;
5413 struct nfs41_exchange_id_args args = {
cd93710e 5414 .verifier = &verifier,
99fe60d0 5415 .client = clp,
357f54d6 5416 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5417 };
5418 struct nfs41_exchange_id_res res = {
32b01310 5419 0
99fe60d0
BH		 5420 };
5421 int status;
5422 struct rpc_message msg = {
5423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5424 .rpc_argp = &args,
5425 .rpc_resp = &res,
5426 .rpc_cred = cred,
5427 };
99fe60d0 5428
f092075d 5429 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5430 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5431 sizeof(args.id));
6bbb4ae8
CL		 5432 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5433 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5434 args.id_len, args.id);
99fe60d0 5435
acdeb69d 5436 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5437 GFP_NOFS);
acdeb69d 5438 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5439 status = -ENOMEM;
5440 goto out;
5441 }
78fe0f41 5442
79d4e1f0 5443 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5444 GFP_NOFS);
177313f1 5445 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5446 status = -ENOMEM;
acdeb69d 5447 goto out_server_owner;
abe9a6d5 5448 }
78fe0f41 5449
bbafffd2 5450 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5451 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5452 status = -ENOMEM;
5453 goto out_server_scope;
5454 }
5455
1bd714f2 5456 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5457 if (status == 0)
32b01310 5458 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5459
acdeb69d 5460 if (status == 0) {
32b01310
TM		 5461 clp->cl_clientid = res.clientid;
5462 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5463 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5464 clp->cl_seqid = res.seqid;
5465
acdeb69d
CL		 5466 kfree(clp->cl_serverowner);
5467 clp->cl_serverowner = res.server_owner;
5468 res.server_owner = NULL;
78fe0f41 5469
7d2ed9ac 5470 /* use the most recent implementation id */
59155546
CL		 5471 kfree(clp->cl_implid);
5472 clp->cl_implid = res.impl_id;
7d2ed9ac 5473
177313f1 5474 if (clp->cl_serverscope != NULL &&
79d4e1f0 5475 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5476 res.server_scope)) {
5477 dprintk("%s: server_scope mismatch detected\n",
5478 __func__);
5479 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5480 kfree(clp->cl_serverscope);
5481 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5482 }
5483
177313f1 5484 if (clp->cl_serverscope == NULL) {
79d4e1f0 5485 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5486 goto out;
5487 }
32b01310
TM		 5488 } else
5489 kfree(res.impl_id);
7d2ed9ac 5490
acdeb69d
CL		 5491out_server_owner:
5492 kfree(res.server_owner);
7d2ed9ac 5493out_server_scope:
abe9a6d5
WAA		 5494 kfree(res.server_scope);
5495out:
177313f1 5496 if (clp->cl_implid != NULL)
6bbb4ae8 5497 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5498 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5499 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5500 clp->cl_implid->date.seconds,
5501 clp->cl_implid->date.nseconds);
6bbb4ae8 5502 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5503 return status;
5504}
5505
66245539
TM		 5506static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5507 struct rpc_cred *cred)
5508{
5509 struct rpc_message msg = {
5510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5511 .rpc_argp = clp,
5512 .rpc_cred = cred,
5513 };
5514 int status;
5515
5516 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5517 if (status)
02c67525 5518 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5519 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5520 return status;
5521}
5522
5523static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5524 struct rpc_cred *cred)
5525{
5526 unsigned int loop;
5527 int ret;
5528
5529 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5530 ret = _nfs4_proc_destroy_clientid(clp, cred);
5531 switch (ret) {
5532 case -NFS4ERR_DELAY:
5533 case -NFS4ERR_CLIENTID_BUSY:
5534 ssleep(1);
5535 break;
5536 default:
5537 return ret;
5538 }
5539 }
5540 return 0;
5541}
5542
5543int nfs4_destroy_clientid(struct nfs_client *clp)
5544{
5545 struct rpc_cred *cred;
5546 int ret = 0;
5547
5548 if (clp->cl_mvops->minor_version < 1)
5549 goto out;
5550 if (clp->cl_exchange_flags == 0)
5551 goto out;
05f4c350
CL		 5552 if (clp->cl_preserve_clid)
5553 goto out;
66245539
TM		 5554 cred = nfs4_get_exchange_id_cred(clp);
5555 ret = nfs4_proc_destroy_clientid(clp, cred);
5556 if (cred)
5557 put_rpccred(cred);
5558 switch (ret) {
5559 case 0:
5560 case -NFS4ERR_STALE_CLIENTID:
5561 clp->cl_exchange_flags = 0;
5562 }
5563out:
5564 return ret;
5565}
5566
2050f0cc
AA		 5567struct nfs4_get_lease_time_data {
5568 struct nfs4_get_lease_time_args *args;
5569 struct nfs4_get_lease_time_res *res;
5570 struct nfs_client *clp;
5571};
5572
5573static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5574 void *calldata)
5575{
5576 int ret;
5577 struct nfs4_get_lease_time_data *data =
5578 (struct nfs4_get_lease_time_data *)calldata;
5579
5580 dprintk("--> %s\n", __func__);
689cf5c1 5581 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5582 /* just setup sequence, do not trigger session recovery
5583 since we're invoked within one */
5584 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5585 &data->args->la_seq_args,
9d12b216 5586 &data->res->lr_seq_res, task);
2050f0cc 5587
d3edcf96
TM		 5588 if (ret != -EAGAIN)
5589 rpc_call_start(task);
2050f0cc
AA		 5590 dprintk("<-- %s\n", __func__);
5591}
5592
5593/*
5594 * Called from nfs4_state_manager thread for session setup, so don't recover
5595 * from sequence operation or clientid errors.
5596 */
5597static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5598{
5599 struct nfs4_get_lease_time_data *data =
5600 (struct nfs4_get_lease_time_data *)calldata;
5601
5602 dprintk("--> %s\n", __func__);
14516c3a
TM		 5603 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5604 return;
2050f0cc
AA		 5605 switch (task->tk_status) {
5606 case -NFS4ERR_DELAY:
5607 case -NFS4ERR_GRACE:
5608 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5609 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5610 task->tk_status = 0;
a8a4ae3a
AA		 5611 /* fall through */
5612 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5613 rpc_restart_call_prepare(task);
2050f0cc
AA		 5614 return;
5615 }
2050f0cc
AA		 5616 dprintk("<-- %s\n", __func__);
5617}
5618
17280175 5619static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5620 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5621 .rpc_call_done = nfs4_get_lease_time_done,
5622};
5623
5624int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5625{
5626 struct rpc_task *task;
5627 struct nfs4_get_lease_time_args args;
5628 struct nfs4_get_lease_time_res res = {
5629 .lr_fsinfo = fsinfo,
5630 };
5631 struct nfs4_get_lease_time_data data = {
5632 .args = &args,
5633 .res = &res,
5634 .clp = clp,
5635 };
5636 struct rpc_message msg = {
5637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5638 .rpc_argp = &args,
5639 .rpc_resp = &res,
5640 };
5641 struct rpc_task_setup task_setup = {
5642 .rpc_client = clp->cl_rpcclient,
5643 .rpc_message = &msg,
5644 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5645 .callback_data = &data,
5646 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5647 };
5648 int status;
5649
9d12b216 5650 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5651 dprintk("--> %s\n", __func__);
5652 task = rpc_run_task(&task_setup);
5653
5654 if (IS_ERR(task))
5655 status = PTR_ERR(task);
5656 else {
5657 status = task->tk_status;
5658 rpc_put_task(task);
5659 }
5660 dprintk("<-- %s return %d\n", __func__, status);
5661
5662 return status;
5663}
5664
e3725ec0
TM		 5665struct nfs4_slot *nfs4_alloc_slots(struct nfs4_slot_table *table,
5666 u32 max_slots, gfp_t gfp_flags)
f86f36a6 5667{
e3725ec0
TM		 5668 struct nfs4_slot *tbl;
5669 u32 i;
5670
5671 tbl = kmalloc_array(max_slots, sizeof(*tbl), gfp_flags);
5672 if (tbl != NULL) {
df2fabff 5673 for (i = 0; i < max_slots; i++) {
e3725ec0 5674 tbl[i].table = table;
df2fabff
TM		 5675 tbl[i].slot_nr = i;
5676 }
e3725ec0
TM		 5677 }
5678 return tbl;
f86f36a6
TM		 5679}
5680
5681static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5682 struct nfs4_slot *new,
5683 u32 max_slots,
5684 u32 ivalue)
5685{
5686 struct nfs4_slot *old = NULL;
5687 u32 i;
5688
5689 spin_lock(&tbl->slot_tbl_lock);
5690 if (new) {
5691 old = tbl->slots;
5692 tbl->slots = new;
5693 tbl->max_slots = max_slots;
5694 }
f9b1ef5f 5695 tbl->highest_used_slotid = NFS4_NO_SLOT;
f86f36a6
TM		 5696 for (i = 0; i < tbl->max_slots; i++)
5697 tbl->slots[i].seq_nr = ivalue;
5698 spin_unlock(&tbl->slot_tbl_lock);
5699 kfree(old);
5700}
5701
b73dafa7 5702/*
f86f36a6 5703 * (re)Initialise a slot table
b73dafa7 5704 */
f86f36a6
TM		 5705static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5706 u32 ivalue)
ac72b7b3 5707{
104aeba4 5708 struct nfs4_slot *new = NULL;
f86f36a6 5709 int ret = -ENOMEM;
ac72b7b3 5710
104aeba4
AA		 5711 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5712 max_reqs, tbl->max_slots);
ac72b7b3 5713
104aeba4
AA		 5714 /* Does the newly negotiated max_reqs match the existing slot table? */
5715 if (max_reqs != tbl->max_slots) {
e3725ec0 5716 new = nfs4_alloc_slots(tbl, max_reqs, GFP_NOFS);
104aeba4
AA		 5717 if (!new)
5718 goto out;
104aeba4 5719 }
f86f36a6
TM		 5720 ret = 0;
5721
5722 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5723 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5724 tbl, tbl->slots, tbl->max_slots);
5725out:
5726 dprintk("<-- %s: return %d\n", __func__, ret);
5727 return ret;
5728}
5729
f8625a6a
RL		 5730/* Destroy the slot table */
5731static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5732{
5733 if (session->fc_slot_table.slots != NULL) {
5734 kfree(session->fc_slot_table.slots);
5735 session->fc_slot_table.slots = NULL;
5736 }
5737 if (session->bc_slot_table.slots != NULL) {
5738 kfree(session->bc_slot_table.slots);
5739 session->bc_slot_table.slots = NULL;
5740 }
5741 return;
5742}
5743
050047ce 5744/*
aacd5537 5745 * Initialize or reset the forechannel and backchannel tables
050047ce 5746 */
aacd5537 5747static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5748{
f26468fb 5749 struct nfs4_slot_table *tbl;
aacd5537 5750 int status;
050047ce 5751
aacd5537
AA		 5752 dprintk("--> %s\n", __func__);
5753 /* Fore channel */
5754 tbl = &ses->fc_slot_table;
e3725ec0 5755 tbl->session = ses;
f86f36a6
TM		 5756 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5757 if (status) /* -ENOMEM */
5758 return status;
aacd5537
AA		 5759 /* Back channel */
5760 tbl = &ses->bc_slot_table;
e3725ec0 5761 tbl->session = ses;
f86f36a6
TM		 5762 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5763 if (status && tbl->slots == NULL)
5764 /* Fore and back channel share a connection so get
5765 * both slot tables or neither */
5766 nfs4_destroy_slot_tables(ses);
f8625a6a 5767 return status;
557134a3
AA		 5768}
5769
5770struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5771{
5772 struct nfs4_session *session;
5773 struct nfs4_slot_table *tbl;
5774
8535b2be 5775 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5776 if (!session)
5777 return NULL;
76db6d95 5778
557134a3 5779 tbl = &session->fc_slot_table;
45d43c29 5780 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5781 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5782 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5783 init_completion(&tbl->complete);
f8625a6a
RL		 5784
5785 tbl = &session->bc_slot_table;
45d43c29 5786 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5787 spin_lock_init(&tbl->slot_tbl_lock);
5788 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5789 init_completion(&tbl->complete);
f8625a6a 5790
1055d76d
TM		 5791 session->session_state = 1<<NFS4_SESSION_INITING;
5792
557134a3
AA		 5793 session->clp = clp;
5794 return session;
5795}
5796
5797void nfs4_destroy_session(struct nfs4_session *session)
5798{
2446ab60 5799 struct rpc_xprt *xprt;
848f5bda 5800 struct rpc_cred *cred;
2446ab60 5801
848f5bda
TM		 5802 cred = nfs4_get_exchange_id_cred(session->clp);
5803 nfs4_proc_destroy_session(session, cred);
5804 if (cred)
5805 put_rpccred(cred);
2446ab60
TM		 5806
5807 rcu_read_lock();
5808 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5809 rcu_read_unlock();
5a0ffe54 5810 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5811 __func__, xprt);
5812 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5813 nfs4_destroy_slot_tables(session);
557134a3
AA		 5814 kfree(session);
5815}
5816
fc931582
AA		 5817/*
5818 * Initialize the values to be used by the client in CREATE_SESSION
5819 * If nfs4_init_session set the fore channel request and response sizes,
5820 * use them.
5821 *
5822 * Set the back channel max_resp_sz_cached to zero to force the client to
5823 * always set csa_cachethis to FALSE because the current implementation
5824 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5825 */
5826static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5827{
5828 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5829 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5830 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5831
5832 if (mxrqst_sz == 0)
5833 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5834 if (mxresp_sz == 0)
5835 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5836 /* Fore channel attributes */
fc931582
AA		 5837 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5838 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5839 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5840 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5841
5842 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5843 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5844 __func__,
5845 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5846 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5847
5848 /* Back channel attributes */
fc931582
AA		 5849 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5850 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5851 args->bc_attrs.max_resp_sz_cached = 0;
5852 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5853 args->bc_attrs.max_reqs = 1;
5854
5855 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5856 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5857 __func__,
5858 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5859 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5860 args->bc_attrs.max_reqs);
5861}
5862
43c2e885 5863static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5864{
43c2e885
BF		 5865 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5866 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5867
43c2e885
BF		 5868 if (rcvd->max_resp_sz > sent->max_resp_sz)
5869 return -EINVAL;
5870 /*
5871 * Our requested max_ops is the minimum we need; we're not
5872 * prepared to break up compounds into smaller pieces than that.
5873 * So, no point even trying to continue if the server won't
5874 * cooperate:
5875 */
5876 if (rcvd->max_ops < sent->max_ops)
5877 return -EINVAL;
5878 if (rcvd->max_reqs == 0)
5879 return -EINVAL;
b4b9a0c1
VG		 5880 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5881 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5882 return 0;
8d35301d
AA		 5883}
5884
43c2e885
BF		 5885static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5886{
5887 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5888 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5889
43c2e885
BF		 5890 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5891 return -EINVAL;
5892 if (rcvd->max_resp_sz < sent->max_resp_sz)
5893 return -EINVAL;
5894 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5895 return -EINVAL;
5896 /* These would render the backchannel useless: */
b4b9a0c1 5897 if (rcvd->max_ops != sent->max_ops)
43c2e885 5898 return -EINVAL;
b4b9a0c1 5899 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5900 return -EINVAL;
5901 return 0;
5902}
8d35301d 5903
8d35301d
AA		 5904static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5905 struct nfs4_session *session)
5906{
43c2e885 5907 int ret;
8d35301d 5908
43c2e885
BF		 5909 ret = nfs4_verify_fore_channel_attrs(args, session);
5910 if (ret)
5911 return ret;
5912 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5913}
5914
848f5bda
TM		 5915static int _nfs4_proc_create_session(struct nfs_client *clp,
5916 struct rpc_cred *cred)
fc931582
AA		 5917{
5918 struct nfs4_session *session = clp->cl_session;
5919 struct nfs41_create_session_args args = {
5920 .client = clp,
5921 .cb_program = NFS4_CALLBACK,
5922 };
5923 struct nfs41_create_session_res res = {
5924 .client = clp,
5925 };
5926 struct rpc_message msg = {
5927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5928 .rpc_argp = &args,
5929 .rpc_resp = &res,
848f5bda 5930 .rpc_cred = cred,
fc931582
AA		 5931 };
5932 int status;
5933
5934 nfs4_init_channel_attrs(&args);
0f91421e 5935 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5936
1bd714f2 5937 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5938
43095d39 5939 if (!status) {
8d35301d
AA		 5940 /* Verify the session's negotiated channel_attrs values */
5941 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5942 /* Increment the clientid slot sequence id */
5943 clp->cl_seqid++;
5944 }
5945
5946 return status;
5947}
5948
5949/*
5950 * Issues a CREATE_SESSION operation to the server.
5951 * It is the responsibility of the caller to verify the session is
5952 * expired before calling this routine.
5953 */
848f5bda 5954int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5955{
5956 int status;
5957 unsigned *ptr;
fc931582
AA		 5958 struct nfs4_session *session = clp->cl_session;
5959
5960 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5961
848f5bda 5962 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5963 if (status)
5964 goto out;
5965
aacd5537
AA		 5966 /* Init or reset the session slot tables */
5967 status = nfs4_setup_session_slot_tables(session);
5968 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5969 if (status)
5970 goto out;
5971
5972 ptr = (unsigned *)&session->sess_id.data[0];
5973 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5974 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5975out:
5976 dprintk("<-- %s\n", __func__);
5977 return status;
5978}
5979
0f3e66c6
AA		 5980/*
5981 * Issue the over-the-wire RPC DESTROY_SESSION.
5982 * The caller must serialize access to this routine.
5983 */
848f5bda
TM		 5984int nfs4_proc_destroy_session(struct nfs4_session *session,
5985 struct rpc_cred *cred)
0f3e66c6 5986{
848f5bda
TM		 5987 struct rpc_message msg = {
5988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5989 .rpc_argp = session,
5990 .rpc_cred = cred,
5991 };
0f3e66c6 5992 int status = 0;
0f3e66c6
AA		 5993
5994 dprintk("--> nfs4_proc_destroy_session\n");
5995
5996 /* session is still being setup */
5997 if (session->clp->cl_cons_state != NFS_CS_READY)
5998 return status;
5999
1bd714f2 6000 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 6001
6002 if (status)
08106ac7 6003 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6004 "Session has been destroyed regardless...\n", status);
6005
6006 dprintk("<-- nfs4_proc_destroy_session\n");
6007 return status;
6008}
6009
7b38c368
TM		 6010/*
6011 * With sessions, the client is not marked ready until after a
6012 * successful EXCHANGE_ID and CREATE_SESSION.
6013 *
6014 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
6015 * other versions of NFS can be tried.
6016 */
6017static int nfs41_check_session_ready(struct nfs_client *clp)
6018{
6019 int ret;
6020
6021 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
6022 ret = nfs4_client_recover_expired_lease(clp);
6023 if (ret)
6024 return ret;
6025 }
6026 if (clp->cl_cons_state < NFS_CS_READY)
6027 return -EPROTONOSUPPORT;
54ac471c 6028 smp_rmb();
7b38c368
TM		 6029 return 0;
6030}
6031
fccba804
TM		 6032int nfs4_init_session(struct nfs_server *server)
6033{
6034 struct nfs_client *clp = server->nfs_client;
2449ea2e 6035 struct nfs4_session *session;
ae72ae67
TM		 6036 unsigned int target_max_rqst_sz = NFS_MAX_FILE_IO_SIZE;
6037 unsigned int target_max_resp_sz = NFS_MAX_FILE_IO_SIZE;
fccba804
TM		 6038
6039 if (!nfs4_has_session(clp))
6040 return 0;
6041
ae72ae67
TM		 6042 if (server->rsize != 0)
6043 target_max_resp_sz = server->rsize;
6044 target_max_resp_sz += nfs41_maxread_overhead;
6045
6046 if (server->wsize != 0)
6047 target_max_rqst_sz = server->wsize;
6048 target_max_rqst_sz += nfs41_maxwrite_overhead;
6049
1055d76d 6050 session = clp->cl_session;
7b38c368
TM		 6051 spin_lock(&clp->cl_lock);
6052 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
ae72ae67
TM		 6053 /* Initialise targets and channel attributes */
6054 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6055 session->fc_attrs.max_rqst_sz = target_max_rqst_sz;
6056 session->fc_target_max_resp_sz = target_max_resp_sz;
6057 session->fc_attrs.max_resp_sz = target_max_resp_sz;
688a9024
TM		 6058 } else {
6059 /* Just adjust the targets */
6060 if (target_max_rqst_sz > session->fc_target_max_rqst_sz) {
6061 session->fc_target_max_rqst_sz = target_max_rqst_sz;
6062 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6063 }
6064 if (target_max_resp_sz > session->fc_target_max_resp_sz) {
6065 session->fc_target_max_resp_sz = target_max_resp_sz;
6066 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
6067 }
7b38c368
TM		 6068 }
6069 spin_unlock(&clp->cl_lock);
2449ea2e 6070
688a9024
TM		 6071 if (test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
6072 nfs4_schedule_lease_recovery(clp);
6073
7b38c368 6074 return nfs41_check_session_ready(clp);
fccba804
TM		 6075}
6076
7b38c368 6077int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 6078{
6079 struct nfs4_session *session = clp->cl_session;
6080 int ret;
6081
7b38c368
TM		 6082 spin_lock(&clp->cl_lock);
6083 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
6084 /*
6085 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
6086 * DS lease to be equal to the MDS lease.
6087 */
6088 clp->cl_lease_time = lease_time;
6089 clp->cl_last_renewal = jiffies;
6090 }
6091 spin_unlock(&clp->cl_lock);
d83217c1 6092
7b38c368
TM		 6093 ret = nfs41_check_session_ready(clp);
6094 if (ret)
6095 return ret;
6096 /* Test for the DS role */
6097 if (!is_ds_client(clp))
6098 return -ENODEV;
6099 return 0;
d83217c1
AA		 6100}
6101EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
6102
6103
fc01cea9
AA		 6104/*
6105 * Renew the cl_session lease.
6106 */
d5f8d3fe
TM		 6107struct nfs4_sequence_data {
6108 struct nfs_client *clp;
6109 struct nfs4_sequence_args args;
6110 struct nfs4_sequence_res res;
6111};
6112
dc96aef9
AB		 6113static void nfs41_sequence_release(void *data)
6114{
d5f8d3fe
TM		 6115 struct nfs4_sequence_data *calldata = data;
6116 struct nfs_client *clp = calldata->clp;
dc96aef9 6117
7135840f
AB		 6118 if (atomic_read(&clp->cl_count) > 1)
6119 nfs4_schedule_state_renewal(clp);
6120 nfs_put_client(clp);
d5f8d3fe 6121 kfree(calldata);
dc96aef9
AB		 6122}
6123
aa5190d0
TM		 6124static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6125{
6126 switch(task->tk_status) {
6127 case -NFS4ERR_DELAY:
aa5190d0
TM		 6128 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6129 return -EAGAIN;
6130 default:
0400a6b0 6131 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6132 }
6133 return 0;
6134}
6135
dc96aef9 6136static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6137{
d5f8d3fe
TM		 6138 struct nfs4_sequence_data *calldata = data;
6139 struct nfs_client *clp = calldata->clp;
fc01cea9 6140
14516c3a
TM		 6141 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6142 return;
fc01cea9
AA		 6143
6144 if (task->tk_status < 0) {
6145 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6146 if (atomic_read(&clp->cl_count) == 1)
6147 goto out;
fc01cea9 6148
aa5190d0
TM		 6149 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6150 rpc_restart_call_prepare(task);
fc01cea9
AA		 6151 return;
6152 }
6153 }
fc01cea9 6154 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6155out:
fc01cea9
AA		 6156 dprintk("<-- %s\n", __func__);
6157}
6158
6159static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6160{
d5f8d3fe
TM		 6161 struct nfs4_sequence_data *calldata = data;
6162 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6163 struct nfs4_sequence_args *args;
6164 struct nfs4_sequence_res *res;
6165
fc01cea9
AA		 6166 args = task->tk_msg.rpc_argp;
6167 res = task->tk_msg.rpc_resp;
6168
9d12b216 6169 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 6170 return;
6171 rpc_call_start(task);
6172}
6173
6bdb5f21
BS		 6174static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
6175{
6176 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6177 nfs41_sequence_prepare(task, data);
6178}
6179
fc01cea9
AA		 6180static const struct rpc_call_ops nfs41_sequence_ops = {
6181 .rpc_call_done = nfs41_sequence_call_done,
6182 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6183 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6184};
6185
6bdb5f21
BS		 6186static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
6187 .rpc_call_done = nfs41_sequence_call_done,
6188 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
6189 .rpc_release = nfs41_sequence_release,
6190};
6191
6192static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
6193 const struct rpc_call_ops *seq_ops)
fc01cea9 6194{
d5f8d3fe 6195 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6196 struct rpc_message msg = {
6197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6198 .rpc_cred = cred,
6199 };
71ac6da9
TM		 6200 struct rpc_task_setup task_setup_data = {
6201 .rpc_client = clp->cl_rpcclient,
6202 .rpc_message = &msg,
6bdb5f21 6203 .callback_ops = seq_ops,
71ac6da9
TM		 6204 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6205 };
fc01cea9 6206
7135840f 6207 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6208 return ERR_PTR(-EIO);
dfb4f309 6209 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6210 if (calldata == NULL) {
7135840f 6211 nfs_put_client(clp);
71ac6da9 6212 return ERR_PTR(-ENOMEM);
fc01cea9 6213 }
9d12b216 6214 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6215 msg.rpc_argp = &calldata->args;
6216 msg.rpc_resp = &calldata->res;
6217 calldata->clp = clp;
71ac6da9 6218 task_setup_data.callback_data = calldata;
fc01cea9 6219
71ac6da9
TM		 6220 return rpc_run_task(&task_setup_data);
6221}
6222
2f60ea6b 6223static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6224{
6225 struct rpc_task *task;
6226 int ret = 0;
6227
2f60ea6b
TM		 6228 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6229 return 0;
6bdb5f21 6230 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
71ac6da9
TM		 6231 if (IS_ERR(task))
6232 ret = PTR_ERR(task);
6233 else
bf294b41 6234 rpc_put_task_async(task);
71ac6da9
TM		 6235 dprintk("<-- %s status=%d\n", __func__, ret);
6236 return ret;
6237}
6238
6239static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6240{
6241 struct rpc_task *task;
6242 int ret;
6243
6bdb5f21 6244 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
71ac6da9
TM		 6245 if (IS_ERR(task)) {
6246 ret = PTR_ERR(task);
6247 goto out;
6248 }
6249 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6250 if (!ret) {
6251 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6252
6253 if (task->tk_status == 0)
6254 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6255 ret = task->tk_status;
b4410c2f 6256 }
71ac6da9
TM		 6257 rpc_put_task(task);
6258out:
6259 dprintk("<-- %s status=%d\n", __func__, ret);
6260 return ret;
fc01cea9
AA		 6261}
6262
fce5c838
RL		 6263struct nfs4_reclaim_complete_data {
6264 struct nfs_client *clp;
6265 struct nfs41_reclaim_complete_args arg;
6266 struct nfs41_reclaim_complete_res res;
6267};
6268
6269static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6270{
6271 struct nfs4_reclaim_complete_data *calldata = data;
6272
b257957e 6273 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6274 if (nfs41_setup_sequence(calldata->clp->cl_session,
6275 &calldata->arg.seq_args,
9d12b216 6276 &calldata->res.seq_res, task))
fce5c838
RL		 6277 return;
6278
6279 rpc_call_start(task);
6280}
6281
aa5190d0
TM		 6282static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6283{
6284 switch(task->tk_status) {
6285 case 0:
6286 case -NFS4ERR_COMPLETE_ALREADY:
6287 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6288 break;
6289 case -NFS4ERR_DELAY:
aa5190d0 6290 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6291 /* fall through */
6292 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6293 return -EAGAIN;
6294 default:
0400a6b0 6295 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6296 }
6297 return 0;
6298}
6299
fce5c838
RL		 6300static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6301{
6302 struct nfs4_reclaim_complete_data *calldata = data;
6303 struct nfs_client *clp = calldata->clp;
6304 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6305
6306 dprintk("--> %s\n", __func__);
14516c3a
TM		 6307 if (!nfs41_sequence_done(task, res))
6308 return;
fce5c838 6309
aa5190d0
TM		 6310 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6311 rpc_restart_call_prepare(task);
6312 return;
6313 }
fce5c838
RL		 6314 dprintk("<-- %s\n", __func__);
6315}
6316
6317static void nfs4_free_reclaim_complete_data(void *data)
6318{
6319 struct nfs4_reclaim_complete_data *calldata = data;
6320
6321 kfree(calldata);
6322}
6323
6324static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6325 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6326 .rpc_call_done = nfs4_reclaim_complete_done,
6327 .rpc_release = nfs4_free_reclaim_complete_data,
6328};
6329
6330/*
6331 * Issue a global reclaim complete.
6332 */
6333static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6334{
6335 struct nfs4_reclaim_complete_data *calldata;
6336 struct rpc_task *task;
6337 struct rpc_message msg = {
6338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6339 };
6340 struct rpc_task_setup task_setup_data = {
6341 .rpc_client = clp->cl_rpcclient,
6342 .rpc_message = &msg,
6343 .callback_ops = &nfs4_reclaim_complete_call_ops,
6344 .flags = RPC_TASK_ASYNC,
6345 };
6346 int status = -ENOMEM;
6347
6348 dprintk("--> %s\n", __func__);
8535b2be 6349 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6350 if (calldata == NULL)
6351 goto out;
6352 calldata->clp = clp;
6353 calldata->arg.one_fs = 0;
fce5c838 6354
9d12b216 6355 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6356 msg.rpc_argp = &calldata->arg;
6357 msg.rpc_resp = &calldata->res;
6358 task_setup_data.callback_data = calldata;
6359 task = rpc_run_task(&task_setup_data);
acf82b85 6360 if (IS_ERR(task)) {
fce5c838 6361 status = PTR_ERR(task);
acf82b85
DC		 6362 goto out;
6363 }
c34c32ea
AA		 6364 status = nfs4_wait_for_completion_rpc_task(task);
6365 if (status == 0)
6366 status = task->tk_status;
fce5c838 6367 rpc_put_task(task);
acf82b85 6368 return 0;
fce5c838
RL		 6369out:
6370 dprintk("<-- %s status=%d\n", __func__, status);
6371 return status;
6372}
b1f69b75
AA		 6373
6374static void
6375nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6376{
6377 struct nfs4_layoutget *lgp = calldata;
c31663d4 6378 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6379
6380 dprintk("--> %s\n", __func__);
c31663d4
FI		 6381 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6382 * right now covering the LAYOUTGET we are about to send.
6383 * However, that is not so catastrophic, and there seems
6384 * to be no way to prevent it completely.
6385 */
b1f69b75 6386 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6387 &lgp->res.seq_res, task))
b1f69b75 6388 return;
cf7d63f1
FI		 6389 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6390 NFS_I(lgp->args.inode)->layout,
6391 lgp->args.ctx->state)) {
6392 rpc_exit(task, NFS4_OK);
6393 return;
6394 }
b1f69b75
AA		 6395 rpc_call_start(task);
6396}
6397
6398static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6399{
6400 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6401 struct inode *inode = lgp->args.inode;
6402 struct nfs_server *server = NFS_SERVER(inode);
6403 struct pnfs_layout_hdr *lo;
6404 struct nfs4_state *state = NULL;
b1f69b75
AA		 6405
6406 dprintk("--> %s\n", __func__);
6407
6408 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6409 goto out;
b1f69b75
AA		 6410
6411 switch (task->tk_status) {
6412 case 0:
ee314c2a 6413 goto out;
b1f69b75
AA		 6414 case -NFS4ERR_LAYOUTTRYLATER:
6415 case -NFS4ERR_RECALLCONFLICT:
6416 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6417 break;
6418 case -NFS4ERR_EXPIRED:
6419 case -NFS4ERR_BAD_STATEID:
6420 spin_lock(&inode->i_lock);
6421 lo = NFS_I(inode)->layout;
6422 if (!lo || list_empty(&lo->plh_segs)) {
6423 spin_unlock(&inode->i_lock);
6424 /* If the open stateid was bad, then recover it. */
6425 state = lgp->args.ctx->state;
6426 } else {
6427 LIST_HEAD(head);
6428
6429 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6430 spin_unlock(&inode->i_lock);
6431 /* Mark the bad layout state as invalid, then
6432 * retry using the open stateid. */
6433 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6434 }
6435 }
ee314c2a
TM		 6436 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6437 rpc_restart_call_prepare(task);
6438out:
b1f69b75
AA		 6439 dprintk("<-- %s\n", __func__);
6440}
6441
8554116e
IK		 6442static size_t max_response_pages(struct nfs_server *server)
6443{
6444 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6445 return nfs_page_array_len(0, max_resp_sz);
6446}
6447
6448static void nfs4_free_pages(struct page **pages, size_t size)
6449{
6450 int i;
6451
6452 if (!pages)
6453 return;
6454
6455 for (i = 0; i < size; i++) {
6456 if (!pages[i])
6457 break;
6458 __free_page(pages[i]);
6459 }
6460 kfree(pages);
6461}
6462
6463static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6464{
6465 struct page **pages;
6466 int i;
6467
6468 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6469 if (!pages) {
6470 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6471 return NULL;
6472 }
6473
6474 for (i = 0; i < size; i++) {
6475 pages[i] = alloc_page(gfp_flags);
6476 if (!pages[i]) {
6477 dprintk("%s: failed to allocate page\n", __func__);
6478 nfs4_free_pages(pages, size);
6479 return NULL;
6480 }
6481 }
6482
6483 return pages;
6484}
6485
b1f69b75
AA		 6486static void nfs4_layoutget_release(void *calldata)
6487{
6488 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6489 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6490 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6491
6492 dprintk("--> %s\n", __func__);
8554116e 6493 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6494 put_nfs_open_context(lgp->args.ctx);
6495 kfree(calldata);
6496 dprintk("<-- %s\n", __func__);
6497}
6498
6499static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6500 .rpc_call_prepare = nfs4_layoutget_prepare,
6501 .rpc_call_done = nfs4_layoutget_done,
6502 .rpc_release = nfs4_layoutget_release,
6503};
6504
a0b0a6e3
TM		 6505struct pnfs_layout_segment *
6506nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6507{
6508 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6509 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6510 struct rpc_task *task;
6511 struct rpc_message msg = {
6512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6513 .rpc_argp = &lgp->args,
6514 .rpc_resp = &lgp->res,
6515 };
6516 struct rpc_task_setup task_setup_data = {
6517 .rpc_client = server->client,
6518 .rpc_message = &msg,
6519 .callback_ops = &nfs4_layoutget_call_ops,
6520 .callback_data = lgp,
6521 .flags = RPC_TASK_ASYNC,
6522 };
a0b0a6e3 6523 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6524 int status = 0;
6525
6526 dprintk("--> %s\n", __func__);
6527
8554116e
IK		 6528 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6529 if (!lgp->args.layout.pages) {
6530 nfs4_layoutget_release(lgp);
a0b0a6e3 6531 return ERR_PTR(-ENOMEM);
8554116e
IK		 6532 }
6533 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6534
35124a09 6535 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6536 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6537 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6538 task = rpc_run_task(&task_setup_data);
6539 if (IS_ERR(task))
a0b0a6e3 6540 return ERR_CAST(task);
b1f69b75 6541 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6542 if (status == 0)
6543 status = task->tk_status;
6544 if (status == 0)
a0b0a6e3 6545 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6546 rpc_put_task(task);
6547 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6548 if (status)
6549 return ERR_PTR(status);
6550 return lseg;
b1f69b75
AA		 6551}
6552
cbe82603
BH		 6553static void
6554nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6555{
6556 struct nfs4_layoutreturn *lrp = calldata;
6557
6558 dprintk("--> %s\n", __func__);
6559 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6560 &lrp->res.seq_res, task))
cbe82603
BH		 6561 return;
6562 rpc_call_start(task);
6563}
6564
6565static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6566{
6567 struct nfs4_layoutreturn *lrp = calldata;
6568 struct nfs_server *server;
6569
6570 dprintk("--> %s\n", __func__);
6571
6572 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6573 return;
6574
6575 server = NFS_SERVER(lrp->args.inode);
6576 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6577 rpc_restart_call_prepare(task);
cbe82603
BH		 6578 return;
6579 }
cbe82603
BH		 6580 dprintk("<-- %s\n", __func__);
6581}
6582
6583static void nfs4_layoutreturn_release(void *calldata)
6584{
6585 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6586 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6587
6588 dprintk("--> %s\n", __func__);
849b286f
TM		 6589 spin_lock(&lo->plh_inode->i_lock);
6590 if (lrp->res.lrs_present)
6591 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6592 lo->plh_block_lgets--;
6593 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6594 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6595 kfree(calldata);
6596 dprintk("<-- %s\n", __func__);
6597}
6598
6599static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6600 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6601 .rpc_call_done = nfs4_layoutreturn_done,
6602 .rpc_release = nfs4_layoutreturn_release,
6603};
6604
6605int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6606{
6607 struct rpc_task *task;
6608 struct rpc_message msg = {
6609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6610 .rpc_argp = &lrp->args,
6611 .rpc_resp = &lrp->res,
6612 };
6613 struct rpc_task_setup task_setup_data = {
6614 .rpc_client = lrp->clp->cl_rpcclient,
6615 .rpc_message = &msg,
6616 .callback_ops = &nfs4_layoutreturn_call_ops,
6617 .callback_data = lrp,
6618 };
6619 int status;
6620
6621 dprintk("--> %s\n", __func__);
9d12b216 6622 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6623 task = rpc_run_task(&task_setup_data);
6624 if (IS_ERR(task))
6625 return PTR_ERR(task);
6626 status = task->tk_status;
6627 dprintk("<-- %s status=%d\n", __func__, status);
6628 rpc_put_task(task);
6629 return status;
6630}
6631
7f11d8d3
AA		 6632/*
6633 * Retrieve the list of Data Server devices from the MDS.
6634 */
6635static int _nfs4_getdevicelist(struct nfs_server *server,
6636 const struct nfs_fh *fh,
6637 struct pnfs_devicelist *devlist)
6638{
6639 struct nfs4_getdevicelist_args args = {
6640 .fh = fh,
6641 .layoutclass = server->pnfs_curr_ld->id,
6642 };
6643 struct nfs4_getdevicelist_res res = {
6644 .devlist = devlist,
6645 };
6646 struct rpc_message msg = {
6647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6648 .rpc_argp = &args,
6649 .rpc_resp = &res,
6650 };
6651 int status;
6652
6653 dprintk("--> %s\n", __func__);
6654 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6655 &res.seq_res, 0);
6656 dprintk("<-- %s status=%d\n", __func__, status);
6657 return status;
6658}
6659
6660int nfs4_proc_getdevicelist(struct nfs_server *server,
6661 const struct nfs_fh *fh,
6662 struct pnfs_devicelist *devlist)
6663{
6664 struct nfs4_exception exception = { };
6665 int err;
6666
6667 do {
6668 err = nfs4_handle_exception(server,
6669 _nfs4_getdevicelist(server, fh, devlist),
6670 &exception);
6671 } while (exception.retry);
6672
6673 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6674 err, devlist->num_devs);
6675
6676 return err;
6677}
6678EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6679
b1f69b75
AA		 6680static int
6681_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6682{
6683 struct nfs4_getdeviceinfo_args args = {
6684 .pdev = pdev,
6685 };
6686 struct nfs4_getdeviceinfo_res res = {
6687 .pdev = pdev,
6688 };
6689 struct rpc_message msg = {
6690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6691 .rpc_argp = &args,
6692 .rpc_resp = &res,
6693 };
6694 int status;
6695
6696 dprintk("--> %s\n", __func__);
7c513058 6697 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6698 dprintk("<-- %s status=%d\n", __func__, status);
6699
6700 return status;
6701}
6702
6703int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6704{
6705 struct nfs4_exception exception = { };
6706 int err;
6707
6708 do {
6709 err = nfs4_handle_exception(server,
6710 _nfs4_proc_getdeviceinfo(server, pdev),
6711 &exception);
6712 } while (exception.retry);
6713 return err;
6714}
6715EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6716
863a3c6c
AA		 6717static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6718{
6719 struct nfs4_layoutcommit_data *data = calldata;
6720 struct nfs_server *server = NFS_SERVER(data->args.inode);
6721
6722 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6723 &data->res.seq_res, task))
863a3c6c
AA		 6724 return;
6725 rpc_call_start(task);
6726}
6727
6728static void
6729nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6730{
6731 struct nfs4_layoutcommit_data *data = calldata;
6732 struct nfs_server *server = NFS_SERVER(data->args.inode);
6733
6734 if (!nfs4_sequence_done(task, &data->res.seq_res))
6735 return;
6736
6737 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6738 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6739 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6740 case -NFS4ERR_BADLAYOUT: /* no layout */
6741 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6742 task->tk_status = 0;
e59d27e0
TM		 6743 break;
6744 case 0:
863a3c6c
AA		 6745 nfs_post_op_update_inode_force_wcc(data->args.inode,
6746 data->res.fattr);
e59d27e0
TM		 6747 break;
6748 default:
6749 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6750 rpc_restart_call_prepare(task);
6751 return;
6752 }
6753 }
863a3c6c
AA		 6754}
6755
6756static void nfs4_layoutcommit_release(void *calldata)
6757{
6758 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6759 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6760 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6761
db29c089 6762 pnfs_cleanup_layoutcommit(data);
863a3c6c 6763 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6764 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6765 list_del_init(&lseg->pls_lc_list);
6766 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6767 &lseg->pls_flags))
9369a431 6768 pnfs_put_lseg(lseg);
a9bae566 6769 }
92407e75
PT		 6770
6771 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6772 smp_mb__after_clear_bit();
6773 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6774
863a3c6c
AA		 6775 put_rpccred(data->cred);
6776 kfree(data);
6777}
6778
6779static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6780 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6781 .rpc_call_done = nfs4_layoutcommit_done,
6782 .rpc_release = nfs4_layoutcommit_release,
6783};
6784
6785int
ef311537 6786nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6787{
6788 struct rpc_message msg = {
6789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6790 .rpc_argp = &data->args,
6791 .rpc_resp = &data->res,
6792 .rpc_cred = data->cred,
6793 };
6794 struct rpc_task_setup task_setup_data = {
6795 .task = &data->task,
6796 .rpc_client = NFS_CLIENT(data->args.inode),
6797 .rpc_message = &msg,
6798 .callback_ops = &nfs4_layoutcommit_ops,
6799 .callback_data = data,
6800 .flags = RPC_TASK_ASYNC,
6801 };
6802 struct rpc_task *task;
6803 int status = 0;
6804
6805 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6806 "lbw: %llu inode %lu\n",
6807 data->task.tk_pid, sync,
6808 data->args.lastbytewritten,
6809 data->args.inode->i_ino);
6810
9d12b216 6811 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6812 task = rpc_run_task(&task_setup_data);
6813 if (IS_ERR(task))
6814 return PTR_ERR(task);
ef311537 6815 if (sync == false)
863a3c6c
AA		 6816 goto out;
6817 status = nfs4_wait_for_completion_rpc_task(task);
6818 if (status != 0)
6819 goto out;
6820 status = task->tk_status;
6821out:
6822 dprintk("%s: status %d\n", __func__, status);
6823 rpc_put_task(task);
6824 return status;
6825}
fca78d6d
BS		 6826
6827static int
6828_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6829 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6830{
6831 struct nfs41_secinfo_no_name_args args = {
6832 .style = SECINFO_STYLE_CURRENT_FH,
6833 };
6834 struct nfs4_secinfo_res res = {
6835 .flavors = flavors,
6836 };
6837 struct rpc_message msg = {
6838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6839 .rpc_argp = &args,
6840 .rpc_resp = &res,
6841 };
6842 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6843}
6844
6845static int
6846nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6847 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6848{
6849 struct nfs4_exception exception = { };
6850 int err;
6851 do {
6852 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6853 switch (err) {
6854 case 0:
6855 case -NFS4ERR_WRONGSEC:
6856 case -NFS4ERR_NOTSUPP:
05e9cfb4 6857 goto out;
fca78d6d
BS		 6858 default:
6859 err = nfs4_handle_exception(server, err, &exception);
6860 }
6861 } while (exception.retry);
05e9cfb4 6862out:
fca78d6d
BS		 6863 return err;
6864}
6865
6866static int
6867nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6868 struct nfs_fsinfo *info)
6869{
6870 int err;
6871 struct page *page;
6872 rpc_authflavor_t flavor;
6873 struct nfs4_secinfo_flavors *flavors;
6874
6875 page = alloc_page(GFP_KERNEL);
6876 if (!page) {
6877 err = -ENOMEM;
6878 goto out;
6879 }
6880
6881 flavors = page_address(page);
6882 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6883
6884 /*
6885 * Fall back on "guess and check" method if
6886 * the server doesn't support SECINFO_NO_NAME
6887 */
6888 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6889 err = nfs4_find_root_sec(server, fhandle, info);
6890 goto out_freepage;
6891 }
6892 if (err)
6893 goto out_freepage;
6894
6895 flavor = nfs_find_best_sec(flavors);
6896 if (err == 0)
6897 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6898
6899out_freepage:
6900 put_page(page);
6901 if (err == -EACCES)
6902 return -EPERM;
6903out:
6904 return err;
6905}
1cab0652
BS		 6906
6907static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6908{
6909 int status;
6910 struct nfs41_test_stateid_args args = {
1cab0652 6911 .stateid = stateid,
7d974794
BS		 6912 };
6913 struct nfs41_test_stateid_res res;
6914 struct rpc_message msg = {
6915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6916 .rpc_argp = &args,
6917 .rpc_resp = &res,
6918 };
1cab0652 6919
38527b15 6920 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6921 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6922 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6923 if (status != NFS_OK) {
6924 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6925 return status;
38527b15
CL		 6926 }
6927 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6928 return -res.status;
7d974794
BS		 6929}
6930
38527b15
CL		 6931/**
6932 * nfs41_test_stateid - perform a TEST_STATEID operation
6933 *
6934 * @server: server / transport on which to perform the operation
6935 * @stateid: state ID to test
6936 *
6937 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6938 * Otherwise a negative NFS4ERR value is returned if the operation
6939 * failed or the state ID is not currently valid.
6940 */
1cab0652 6941static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6942{
6943 struct nfs4_exception exception = { };
6944 int err;
6945 do {
377e507d
CL		 6946 err = _nfs41_test_stateid(server, stateid);
6947 if (err != -NFS4ERR_DELAY)
6948 break;
6949 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6950 } while (exception.retry);
6951 return err;
6952}
9aeda35f 6953
1cab0652 6954static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6955{
9aeda35f 6956 struct nfs41_free_stateid_args args = {
1cab0652 6957 .stateid = stateid,
9aeda35f
BS		 6958 };
6959 struct nfs41_free_stateid_res res;
6960 struct rpc_message msg = {
6961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6962 .rpc_argp = &args,
6963 .rpc_resp = &res,
6964 };
38527b15 6965 int status;
9aeda35f 6966
38527b15 6967 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6968 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6969 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6970 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6971 dprintk("NFS reply free_stateid: %d\n", status);
6972 return status;
9aeda35f
BS		 6973}
6974
38527b15
CL		 6975/**
6976 * nfs41_free_stateid - perform a FREE_STATEID operation
6977 *
6978 * @server: server / transport on which to perform the operation
6979 * @stateid: state ID to release
6980 *
6981 * Returns NFS_OK if the server freed "stateid". Otherwise a
6982 * negative NFS4ERR value is returned.
6983 */
1cab0652 6984static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6985{
6986 struct nfs4_exception exception = { };
6987 int err;
6988 do {
377e507d
CL		 6989 err = _nfs4_free_stateid(server, stateid);
6990 if (err != -NFS4ERR_DELAY)
6991 break;
6992 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6993 } while (exception.retry);
6994 return err;
6995}
36281caa
TM		 6996
6997static bool nfs41_match_stateid(const nfs4_stateid *s1,
6998 const nfs4_stateid *s2)
6999{
2d2f24ad 7000 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7001 return false;
7002
2d2f24ad 7003 if (s1->seqid == s2->seqid)
36281caa 7004 return true;
2d2f24ad 7005 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7006 return true;
7007
7008 return false;
7009}
7010
557134a3
AA		 7011#endif /* CONFIG_NFS_V4_1 */
7012
36281caa
TM		 7013static bool nfs4_match_stateid(const nfs4_stateid *s1,
7014 const nfs4_stateid *s2)
7015{
f597c537 7016 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7017}
7018
7019
17280175 7020static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7021 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7022 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7023 .recover_open = nfs4_open_reclaim,
7024 .recover_lock = nfs4_lock_reclaim,
591d71cb 7025 .establish_clid = nfs4_init_clientid,
90a16617 7026 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7027 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7028};
7029
591d71cb 7030#if defined(CONFIG_NFS_V4_1)
17280175 7031static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7032 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7033 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7034 .recover_open = nfs4_open_reclaim,
7035 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7036 .establish_clid = nfs41_init_clientid,
b4b82607 7037 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7038 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7039 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7040};
7041#endif /* CONFIG_NFS_V4_1 */
7042
17280175 7043static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7044 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7045 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7046 .recover_open = nfs4_open_expired,
7047 .recover_lock = nfs4_lock_expired,
7048 .establish_clid = nfs4_init_clientid,
90a16617 7049 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7050};
7051
7052#if defined(CONFIG_NFS_V4_1)
17280175 7053static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7054 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7055 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7056 .recover_open = nfs41_open_expired,
7057 .recover_lock = nfs41_lock_expired,
4d643d1d 7058 .establish_clid = nfs41_init_clientid,
b4b82607 7059 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7060};
591d71cb 7061#endif /* CONFIG_NFS_V4_1 */
1da177e4 7062
17280175 7063static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7064 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7065 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7066 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7067};
7068
7069#if defined(CONFIG_NFS_V4_1)
17280175 7070static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7071 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7072 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7073 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7074};
7075#endif
7076
97dc1359
TM		 7077static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7078 .minor_version = 0,
7079 .call_sync = _nfs4_call_sync,
36281caa 7080 .match_stateid = nfs4_match_stateid,
fca78d6d 7081 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 7082 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7083 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7084 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7085};
7086
7087#if defined(CONFIG_NFS_V4_1)
7088static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7089 .minor_version = 1,
7090 .call_sync = _nfs4_call_sync_session,
36281caa 7091 .match_stateid = nfs41_match_stateid,
fca78d6d 7092 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 7093 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7094 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7095 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7096};
7097#endif
7098
97dc1359
TM		 7099const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7100 [0] = &nfs_v4_0_minor_ops,
7101#if defined(CONFIG_NFS_V4_1)
7102 [1] = &nfs_v4_1_minor_ops,
7103#endif
7104};
7105
73a79706
BS		 7106const struct inode_operations nfs4_dir_inode_operations = {
7107 .create = nfs_create,
7108 .lookup = nfs_lookup,
7109 .atomic_open = nfs_atomic_open,
7110 .link = nfs_link,
7111 .unlink = nfs_unlink,
7112 .symlink = nfs_symlink,
7113 .mkdir = nfs_mkdir,
7114 .rmdir = nfs_rmdir,
7115 .mknod = nfs_mknod,
7116 .rename = nfs_rename,
7117 .permission = nfs_permission,
7118 .getattr = nfs_getattr,
7119 .setattr = nfs_setattr,
7120 .getxattr = generic_getxattr,
7121 .setxattr = generic_setxattr,
7122 .listxattr = generic_listxattr,
7123 .removexattr = generic_removexattr,
7124};
7125
92e1d5be 7126static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7127 .permission = nfs_permission,
7128 .getattr = nfs_getattr,
7129 .setattr = nfs_setattr,
64c2ce8b
AK		 7130 .getxattr = generic_getxattr,
7131 .setxattr = generic_setxattr,
7132 .listxattr = generic_listxattr,
7133 .removexattr = generic_removexattr,
6b3b5496
BF		 7134};
7135
509de811 7136const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7137 .version = 4, /* protocol version */
7138 .dentry_ops = &nfs4_dentry_operations,
7139 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7140 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7141 .file_ops = &nfs4_file_operations,
1da177e4 7142 .getroot = nfs4_proc_get_root,
281cad46 7143 .submount = nfs4_submount,
ff9099f2 7144 .try_mount = nfs4_try_mount,
1da177e4
LT		 7145 .getattr = nfs4_proc_getattr,
7146 .setattr = nfs4_proc_setattr,
7147 .lookup = nfs4_proc_lookup,
7148 .access = nfs4_proc_access,
7149 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7150 .create = nfs4_proc_create,
7151 .remove = nfs4_proc_remove,
7152 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7153 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7154 .unlink_done = nfs4_proc_unlink_done,
7155 .rename = nfs4_proc_rename,
d3d4152a 7156 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7157 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7158 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7159 .link = nfs4_proc_link,
7160 .symlink = nfs4_proc_symlink,
7161 .mkdir = nfs4_proc_mkdir,
7162 .rmdir = nfs4_proc_remove,
7163 .readdir = nfs4_proc_readdir,
7164 .mknod = nfs4_proc_mknod,
7165 .statfs = nfs4_proc_statfs,
7166 .fsinfo = nfs4_proc_fsinfo,
7167 .pathconf = nfs4_proc_pathconf,
e9326dca 7168 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7169 .decode_dirent = nfs4_decode_dirent,
7170 .read_setup = nfs4_proc_read_setup,
1abb5088 7171 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7172 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7173 .read_done = nfs4_read_done,
1da177e4 7174 .write_setup = nfs4_proc_write_setup,
57208fa7 7175 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7176 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7177 .write_done = nfs4_write_done,
1da177e4 7178 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7179 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7180 .commit_done = nfs4_commit_done,
1da177e4 7181 .lock = nfs4_proc_lock,
e50a1c2e 7182 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7183 .close_context = nfs4_close_context,
2b484297 7184 .open_context = nfs4_atomic_open,
011e2a7f 7185 .have_delegation = nfs4_have_delegation,
57ec14c5 7186 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7187 .alloc_client = nfs4_alloc_client,
45a52a02 7188 .init_client = nfs4_init_client,
cdb7eced 7189 .free_client = nfs4_free_client,
1179acc6
BS		 7190 .create_server = nfs4_create_server,
7191 .clone_server = nfs_clone_server,
1da177e4
LT		 7192};
7193
64c2ce8b
AK		 7194static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7195 .prefix = XATTR_NAME_NFSV4_ACL,
7196 .list = nfs4_xattr_list_nfs4_acl,
7197 .get = nfs4_xattr_get_nfs4_acl,
7198 .set = nfs4_xattr_set_nfs4_acl,
7199};
7200
7201const struct xattr_handler *nfs4_xattr_handlers[] = {
7202 &nfs4_xattr_nfs4_acl_handler,
7203 NULL
7204};
7205
1da177e4
LT		 7206/*
7207 * Local variables:
7208 * c-basic-offset: 8
7209 * End:
7210 */
Linux 6.x block layer and io_uring tree(s)