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NFSv4.1: pnfs_layout_io_set_failed must clear invalid lsegs
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
5a0ffe54 55#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 56#include <linux/xattr.h>
c7a360b0 57#include <linux/utsname.h>
d310310c 58#include <linux/freezer.h>
1da177e4 59
4ce79717 60#include "nfs4_fs.h"
1da177e4 61#include "delegation.h"
101070ca 62#include "internal.h"
006ea73e 63#include "iostat.h"
fc931582 64#include "callback.h"
b1f69b75 65#include "pnfs.h"
f092075d 66#include "netns.h"
1da177e4
LT		 67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
2066fe89 70#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
a78cb57a
TM		 73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
cdd4e68b 75struct nfs4_opendata;
864472e9 76static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 77static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 78static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 79static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 80static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 81static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 82static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
1da177e4 90/* Prevent leaks of NFSv4 errors into userland */
46f72f57 91static int nfs4_map_errors(int err)
1da177e4 92{
52567b03
TM		 93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
7ebb9315
BS		 98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
3ddeb7c5
TM		 100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
fb13bfa7
TM		 103 case -NFS4ERR_SHARE_DENIED:
104 return -EACCES;
f25efd85
SD		 105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
52567b03 107 default:
1da177e4 108 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 109 __func__, -err);
52567b03 110 break;
1da177e4 111 }
52567b03 112 return -EIO;
1da177e4
LT		 113}
114
115/*
116 * This is our standard bitmap for GETATTR requests.
117 */
1549210f 118const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 119 FATTR4_WORD0_TYPE
120 | FATTR4_WORD0_CHANGE
121 | FATTR4_WORD0_SIZE
122 | FATTR4_WORD0_FSID
123 | FATTR4_WORD0_FILEID,
124 FATTR4_WORD1_MODE
125 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
133};
134
1549210f
TM		 135static const u32 nfs4_pnfs_open_bitmap[3] = {
136 FATTR4_WORD0_TYPE
137 | FATTR4_WORD0_CHANGE
138 | FATTR4_WORD0_SIZE
139 | FATTR4_WORD0_FSID
140 | FATTR4_WORD0_FILEID,
141 FATTR4_WORD1_MODE
142 | FATTR4_WORD1_NUMLINKS
143 | FATTR4_WORD1_OWNER
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
151};
152
1da177e4
LT		 153const u32 nfs4_statfs_bitmap[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
160};
161
4ce79717 162const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 163 FATTR4_WORD0_MAXLINK
164 | FATTR4_WORD0_MAXNAME,
165 0
166};
167
dae100c2 168const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME,
55b6e774 172 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 173 | FATTR4_WORD1_FS_LAYOUT_TYPES,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 175};
176
830b8e33
MN		 177const u32 nfs4_fs_locations_bitmap[2] = {
178 FATTR4_WORD0_TYPE
179 | FATTR4_WORD0_CHANGE
180 | FATTR4_WORD0_SIZE
181 | FATTR4_WORD0_FSID
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
194};
195
bc4785cd 196static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 197 struct nfs4_readdir_arg *readdir)
198{
0dbb4c67 199 __be32 *start, *p;
1da177e4
LT		 200
201 BUG_ON(readdir->count < 80);
202 if (cookie > 2) {
b7ef1956 203 readdir->cookie = cookie;
1da177e4
LT		 204 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
205 return;
206 }
207
208 readdir->cookie = 0;
209 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
210 if (cookie == 2)
211 return;
212
213 /*
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
218 * instead of 1 or 2.
219 */
2b86ce2d 220 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 221
222 if (cookie == 0) {
223 *p++ = xdr_one; /* next */
224 *p++ = xdr_zero; /* cookie, first word */
225 *p++ = xdr_one; /* cookie, second word */
226 *p++ = xdr_one; /* entry len */
227 memcpy(p, ".\0\0\0", 4); /* entry */
228 p++;
229 *p++ = xdr_one; /* bitmap length */
230 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
231 *p++ = htonl(8); /* attribute buffer length */
4e769b93 232 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 233 }
234
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_two; /* cookie, second word */
238 *p++ = xdr_two; /* entry len */
239 memcpy(p, "..\0\0", 4); /* entry */
240 p++;
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
4e769b93 244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 245
246 readdir->pgbase = (char *)p - (char *)start;
247 readdir->count -= readdir->pgbase;
2b86ce2d 248 kunmap_atomic(start);
1da177e4
LT		 249}
250
65de872e
TM		 251static int nfs4_wait_clnt_recover(struct nfs_client *clp)
252{
253 int res;
254
255 might_sleep();
256
e005e804 257 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 258 nfs_wait_bit_killable, TASK_KILLABLE);
46a87b8a
CL		 259 if (res)
260 return res;
261
262 if (clp->cl_cons_state < 0)
263 return clp->cl_cons_state;
264 return 0;
65de872e
TM		 265}
266
267static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
268{
269 int res = 0;
270
271 might_sleep();
272
273 if (*timeout <= 0)
274 *timeout = NFS4_POLL_RETRY_MIN;
275 if (*timeout > NFS4_POLL_RETRY_MAX)
276 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 277 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 278 if (fatal_signal_pending(current))
279 res = -ERESTARTSYS;
280 *timeout <<= 1;
281 return res;
282}
283
284/* This is the error handling routine for processes that are allowed
285 * to sleep.
286 */
b064eca2 287static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 288{
289 struct nfs_client *clp = server->nfs_client;
9e33bed5 290 struct nfs4_state *state = exception->state;
3114ea7a 291 struct inode *inode = exception->inode;
65de872e
TM		 292 int ret = errorcode;
293
294 exception->retry = 0;
295 switch(errorcode) {
296 case 0:
297 return 0;
3114ea7a 298 case -NFS4ERR_OPENMODE:
011e2a7f 299 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 300 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 301 exception->retry = 1;
302 return 0;
303 }
304 if (state == NULL)
305 break;
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
a1d0b5ee 308 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 309 case -NFS4ERR_ADMIN_REVOKED:
310 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 311 if (state == NULL)
312 break;
14977489 313 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
0ced63d1
TM		 316 case -NFS4ERR_EXPIRED:
317 if (state != NULL)
318 nfs4_schedule_stateid_recovery(server, state);
65de872e 319 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 320 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 321 nfs4_schedule_lease_recovery(clp);
322 goto wait_on_recovery;
03391693 323#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 324 case -NFS4ERR_BADSESSION:
325 case -NFS4ERR_BADSLOT:
326 case -NFS4ERR_BAD_HIGH_SLOT:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
328 case -NFS4ERR_DEADSESSION:
329 case -NFS4ERR_SEQ_FALSE_RETRY:
330 case -NFS4ERR_SEQ_MISORDERED:
331 dprintk("%s ERROR: %d Reset session\n", __func__,
332 errorcode);
9f594791 333 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
4745e315 334 exception->retry = 1;
b9179237 335 break;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
2c643488 347 case -EKEYEXPIRED:
65de872e
TM		 348 ret = nfs4_delay(server->client, &exception->timeout);
349 if (ret != 0)
350 break;
a8a4ae3a 351 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 352 case -NFS4ERR_OLD_STATEID:
353 exception->retry = 1;
b064eca2
TM		 354 break;
355 case -NFS4ERR_BADOWNER:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME:
358 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
359 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
360 exception->retry = 1;
361 printk(KERN_WARNING "NFS: v4 server %s "
362 "does not accept raw "
363 "uid/gids. "
364 "Reenabling the idmapper.\n",
365 server->nfs_client->cl_hostname);
366 }
65de872e
TM		 367 }
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret);
0400a6b0 370wait_on_recovery:
a2c0b9e2
TM		 371 ret = nfs4_wait_clnt_recover(clp);
372 if (ret == 0)
373 exception->retry = 1;
374 return ret;
65de872e
TM		 375}
376
377
452e9352 378static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 379{
1da177e4
LT		 380 spin_lock(&clp->cl_lock);
381 if (time_before(clp->cl_last_renewal,timestamp))
382 clp->cl_last_renewal = timestamp;
383 spin_unlock(&clp->cl_lock);
384}
385
452e9352
TM		 386static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
387{
388 do_renew_lease(server->nfs_client, timestamp);
389}
390
cccef3b9
AA		 391#if defined(CONFIG_NFS_V4_1)
392
e2c4ab3c
AA		 393/*
394 * nfs4_free_slot - free a slot and efficiently update slot table.
395 *
396 * freeing a slot is trivially done by clearing its respective bit
397 * in the bitmap.
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
45d43c29 404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
35dc1d74
TM		 405 *
406 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 407 */
408static void
45d43c29 409nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
e2c4ab3c 410{
45d43c29 411 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 412 /* clear used bit in bitmap */
413 __clear_bit(slotid, tbl->used_slots);
414
415 /* update highest_used_slotid when it is freed */
416 if (slotid == tbl->highest_used_slotid) {
417 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 418 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 419 tbl->highest_used_slotid = slotid;
420 else
45d43c29 421 tbl->highest_used_slotid = NFS4_NO_SLOT;
e2c4ab3c 422 }
45d43c29
TM		 423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
424 slotid, tbl->highest_used_slotid);
e2c4ab3c
AA		 425}
426
961a828d
TM		 427bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
428{
429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
430 return true;
e2c4ab3c
AA		 431}
432
3bfb0fc5 433/*
42acd021 434 * Signal state manager thread if session fore channel is drained
3bfb0fc5 435 */
42acd021 436static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 437{
a2118c33 438 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
961a828d
TM		 439 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
440 nfs4_set_task_privileged, NULL);
3bfb0fc5
AB		 441 return;
442 }
443
45d43c29 444 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
3bfb0fc5
AB		 445 return;
446
42acd021
AA		 447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
448 complete(&ses->fc_slot_table.complete);
449}
450
451/*
452 * Signal state manager thread if session back channel is drained
453 */
454void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
455{
456 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
45d43c29 457 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
42acd021
AA		 458 return;
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
460 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 461}
462
d185a334 463static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 464{
465 struct nfs4_slot_table *tbl;
466
d185a334 467 tbl = &res->sr_session->fc_slot_table;
dfb4f309 468 if (!res->sr_slot) {
13615871
AA		 469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
691daf3b 471 dprintk("%s: No slot\n", __func__);
35dc1d74 472 return;
13615871 473 }
ea028ac9 474
35dc1d74 475 spin_lock(&tbl->slot_tbl_lock);
aabd0b40 476 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
42acd021 477 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 478 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 479 res->sr_slot = NULL;
13615871
AA		 480}
481
14516c3a 482static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 483{
484 unsigned long timestamp;
14516c3a 485 struct nfs_client *clp;
b0df806c
AA		 486
487 /*
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
491 * operation.
492 */
493 if (res->sr_status == 1)
494 res->sr_status = NFS_OK;
495
468f8613
BS		 496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task))
b0df806c
AA		 498 goto out;
499
691daf3b 500 /* Check the SEQUENCE operation status */
14516c3a
TM		 501 switch (res->sr_status) {
502 case 0:
b0df806c 503 /* Update the slot's sequence and clientid lease timer */
dfb4f309 504 ++res->sr_slot->seq_nr;
b0df806c 505 timestamp = res->sr_renewal_time;
14516c3a 506 clp = res->sr_session->clp;
452e9352 507 do_renew_lease(clp, timestamp);
0629e370 508 /* Check sequence flags */
b4410c2f
TM		 509 if (res->sr_status_flags != 0)
510 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 511 break;
512 case -NFS4ERR_DELAY:
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
515 * of RFC5661.
516 */
12364a4f 517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 518 __func__,
519 res->sr_slot - res->sr_session->fc_slot_table.slots,
520 res->sr_slot->seq_nr);
14516c3a
TM		 521 goto out_retry;
522 default:
523 /* Just update the slot sequence no. */
dfb4f309 524 ++res->sr_slot->seq_nr;
b0df806c
AA		 525 }
526out:
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 529 nfs41_sequence_free_slot(res);
14516c3a
TM		 530 return 1;
531out_retry:
d05dd4e9 532 if (!rpc_restart_call(task))
14516c3a
TM		 533 goto out;
534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
535 return 0;
b0df806c
AA		 536}
537
14516c3a
TM		 538static int nfs4_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
df896455 540{
14516c3a
TM		 541 if (res->sr_session == NULL)
542 return 1;
543 return nfs41_sequence_done(task, res);
df896455
TM		 544}
545
510b8175
BH		 546/*
547 * nfs4_find_slot - efficiently look for a free slot
548 *
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
45d43c29 552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
fbcd4abc
AA		 553 *
554 * Note: must be called with under the slot_tbl_lock.
510b8175 555 */
45d43c29 556static u32
40ead580 557nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175 558{
45d43c29
TM		 559 u32 slotid;
560 u32 ret_id = NFS4_NO_SLOT;
510b8175 561
45d43c29 562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
510b8175
BH		 563 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
564 tbl->max_slots);
565 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
566 if (slotid >= tbl->max_slots)
567 goto out;
568 __set_bit(slotid, tbl->used_slots);
45d43c29
TM		 569 if (slotid > tbl->highest_used_slotid ||
570 tbl->highest_used_slotid == NFS4_NO_SLOT)
510b8175
BH		 571 tbl->highest_used_slotid = slotid;
572 ret_id = slotid;
573out:
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 576 return ret_id;
577}
578
9d12b216
TM		 579static void nfs41_init_sequence(struct nfs4_sequence_args *args,
580 struct nfs4_sequence_res *res, int cache_reply)
581{
582 args->sa_session = NULL;
583 args->sa_cache_this = 0;
584 if (cache_reply)
585 args->sa_cache_this = 1;
586 res->sr_session = NULL;
587 res->sr_slot = NULL;
588}
589
dc70d7b3 590int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 591 struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res,
ce5039c1
AA		 593 struct rpc_task *task)
594{
fbcd4abc
AA		 595 struct nfs4_slot *slot;
596 struct nfs4_slot_table *tbl;
45d43c29 597 u32 slotid;
fbcd4abc
AA		 598
599 dprintk("--> %s\n", __func__);
ce5039c1 600 /* slot already allocated? */
dfb4f309 601 if (res->sr_slot != NULL)
ce5039c1
AA		 602 return 0;
603
fbcd4abc
AA		 604 tbl = &session->fc_slot_table;
605
606 spin_lock(&tbl->slot_tbl_lock);
a2118c33 607 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 608 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 609 /* The state manager will wait until the slot table is empty */
05f0d236 610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 611 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 612 dprintk("%s session is draining\n", __func__);
05f0d236 613 return -EAGAIN;
b069d94a
AA		 614 }
615
689cf5c1
AB		 616 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
617 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
618 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
619 spin_unlock(&tbl->slot_tbl_lock);
620 dprintk("%s enforce FIFO order\n", __func__);
621 return -EAGAIN;
622 }
623
40ead580 624 slotid = nfs4_find_slot(tbl);
45d43c29 625 if (slotid == NFS4_NO_SLOT) {
fbcd4abc
AA		 626 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
627 spin_unlock(&tbl->slot_tbl_lock);
628 dprintk("<-- %s: no free slots\n", __func__);
629 return -EAGAIN;
630 }
631 spin_unlock(&tbl->slot_tbl_lock);
632
689cf5c1 633 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 634 slot = tbl->slots + slotid;
99fe60d0 635 args->sa_session = session;
fbcd4abc 636 args->sa_slotid = slotid;
fbcd4abc
AA		 637
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
639
99fe60d0 640 res->sr_session = session;
dfb4f309 641 res->sr_slot = slot;
fbcd4abc 642 res->sr_renewal_time = jiffies;
2a6e26cd 643 res->sr_status_flags = 0;
fbcd4abc
AA		 644 /*
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
647 */
648 res->sr_status = 1;
ce5039c1
AA		 649 return 0;
650}
dc70d7b3 651EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 652
035168ab 653int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 654 struct nfs4_sequence_args *args,
655 struct nfs4_sequence_res *res,
ce5039c1
AA		 656 struct rpc_task *task)
657{
035168ab 658 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 659 int ret = 0;
660
9d12b216 661 if (session == NULL)
035168ab 662 goto out;
035168ab 663
12364a4f 664 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 665 __func__, session->clp, session, res->sr_slot ?
666 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 667
9d12b216 668 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 669out:
670 dprintk("<-- %s status=%d\n", __func__, ret);
671 return ret;
672}
673
674struct nfs41_call_sync_data {
035168ab 675 const struct nfs_server *seq_server;
ce5039c1
AA		 676 struct nfs4_sequence_args *seq_args;
677 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 678};
679
680static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
681{
682 struct nfs41_call_sync_data *data = calldata;
683
035168ab
TM		 684 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
685
686 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 687 data->seq_res, task))
ce5039c1
AA		 688 return;
689 rpc_call_start(task);
690}
691
b257957e
AB		 692static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
693{
694 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
695 nfs41_call_sync_prepare(task, calldata);
696}
697
69ab40c4
AA		 698static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
699{
700 struct nfs41_call_sync_data *data = calldata;
701
14516c3a 702 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 703}
704
17280175 705static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 706 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 707 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 708};
709
17280175 710static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 711 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
712 .rpc_call_done = nfs41_call_sync_done,
713};
714
7c513058
BS		 715static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
716 struct nfs_server *server,
ce5039c1
AA		 717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res,
b257957e 720 int privileged)
ce5039c1
AA		 721{
722 int ret;
723 struct rpc_task *task;
724 struct nfs41_call_sync_data data = {
035168ab 725 .seq_server = server,
ce5039c1
AA		 726 .seq_args = args,
727 .seq_res = res,
ce5039c1
AA		 728 };
729 struct rpc_task_setup task_setup = {
7c513058 730 .rpc_client = clnt,
ce5039c1
AA		 731 .rpc_message = msg,
732 .callback_ops = &nfs41_call_sync_ops,
733 .callback_data = &data
734 };
735
b257957e
AB		 736 if (privileged)
737 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 738 task = rpc_run_task(&task_setup);
739 if (IS_ERR(task))
740 ret = PTR_ERR(task);
741 else {
742 ret = task->tk_status;
743 rpc_put_task(task);
744 }
745 return ret;
746}
747
7c513058
BS		 748int _nfs4_call_sync_session(struct rpc_clnt *clnt,
749 struct nfs_server *server,
cccef3b9
AA		 750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
753 int cache_reply)
754{
9d12b216
TM		 755 nfs41_init_sequence(args, res, cache_reply);
756 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 757}
758
df896455 759#else
9d12b216
TM		 760static inline
761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
14516c3a
TM		 766static int nfs4_sequence_done(struct rpc_task *task,
767 struct nfs4_sequence_res *res)
df896455 768{
14516c3a 769 return 1;
df896455 770}
cccef3b9
AA		 771#endif /* CONFIG_NFS_V4_1 */
772
7c513058
BS		 773int _nfs4_call_sync(struct rpc_clnt *clnt,
774 struct nfs_server *server,
cccef3b9
AA		 775 struct rpc_message *msg,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
778 int cache_reply)
779{
9d12b216 780 nfs41_init_sequence(args, res, cache_reply);
7c513058 781 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 782}
783
e73b83f2 784static inline
7c513058
BS		 785int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
e73b83f2
BS		 787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
790 int cache_reply)
791{
7c513058
BS		 792 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
793 args, res, cache_reply);
e73b83f2 794}
cccef3b9 795
38478b24 796static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 797{
38478b24 798 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 799
38478b24 800 spin_lock(&dir->i_lock);
359d7d1c 801 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 802 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 803 nfs_force_lookup_revalidate(dir);
a9a4a87a 804 dir->i_version = cinfo->after;
38478b24 805 spin_unlock(&dir->i_lock);
1da177e4
LT		 806}
807
e56e0b78 808struct nfs4_opendata {
c6d00e63 809 struct kref kref;
e56e0b78
TM		 810 struct nfs_openargs o_arg;
811 struct nfs_openres o_res;
cdd4e68b
TM		 812 struct nfs_open_confirmargs c_arg;
813 struct nfs_open_confirmres c_res;
6926afd1
TM		 814 struct nfs4_string owner_name;
815 struct nfs4_string group_name;
e56e0b78 816 struct nfs_fattr f_attr;
e56e0b78 817 struct dentry *dir;
82a2c1b7 818 struct dentry *dentry;
e56e0b78 819 struct nfs4_state_owner *owner;
aac00a8d 820 struct nfs4_state *state;
e56e0b78 821 struct iattr attrs;
26e976a8 822 unsigned long timestamp;
3e309914 823 unsigned int rpc_done : 1;
24ac23ab
TM		 824 int rpc_status;
825 int cancelled;
e56e0b78
TM		 826};
827
2ced46c2
TM		 828
829static void nfs4_init_opendata_res(struct nfs4_opendata *p)
830{
831 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 832 p->o_res.seqid = p->o_arg.seqid;
833 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 834 p->o_res.server = p->o_arg.server;
835 nfs_fattr_init(&p->f_attr);
6926afd1 836 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 837}
838
82a2c1b7 839static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 840 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 841 const struct iattr *attrs,
842 gfp_t gfp_mask)
e56e0b78 843{
82a2c1b7 844 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 845 struct inode *dir = parent->d_inode;
846 struct nfs_server *server = NFS_SERVER(dir);
847 struct nfs4_opendata *p;
848
8535b2be 849 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 850 if (p == NULL)
851 goto err;
8535b2be 852 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 853 if (p->o_arg.seqid == NULL)
854 goto err_free;
82a2c1b7
AV		 855 nfs_sb_active(dentry->d_sb);
856 p->dentry = dget(dentry);
e56e0b78
TM		 857 p->dir = parent;
858 p->owner = sp;
859 atomic_inc(&sp->so_count);
860 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 861 p->o_arg.open_flags = flags;
862 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 863 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 864 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
865 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 866 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 867 p->o_arg.server = server;
868 p->o_arg.bitmask = server->attr_bitmask;
1549210f 869 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 870 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 871 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 872 __be32 verf[2];
d77d76ff 873
e56e0b78
TM		 874 p->o_arg.u.attrs = &p->attrs;
875 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 876
877 verf[0] = jiffies;
878 verf[1] = current->pid;
879 memcpy(p->o_arg.u.verifier.data, verf,
880 sizeof(p->o_arg.u.verifier.data));
e56e0b78 881 }
cdd4e68b
TM		 882 p->c_arg.fh = &p->o_res.fh;
883 p->c_arg.stateid = &p->o_res.stateid;
884 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 885 nfs4_init_opendata_res(p);
c6d00e63 886 kref_init(&p->kref);
e56e0b78
TM		 887 return p;
888err_free:
889 kfree(p);
890err:
891 dput(parent);
892 return NULL;
893}
894
c6d00e63 895static void nfs4_opendata_free(struct kref *kref)
e56e0b78 896{
c6d00e63
TM		 897 struct nfs4_opendata *p = container_of(kref,
898 struct nfs4_opendata, kref);
82a2c1b7 899 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 900
901 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 902 if (p->state != NULL)
903 nfs4_put_open_state(p->state);
c6d00e63
TM		 904 nfs4_put_state_owner(p->owner);
905 dput(p->dir);
82a2c1b7
AV		 906 dput(p->dentry);
907 nfs_sb_deactive(sb);
6926afd1 908 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 909 kfree(p);
910}
911
912static void nfs4_opendata_put(struct nfs4_opendata *p)
913{
914 if (p != NULL)
915 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 916}
917
06f814a3
TM		 918static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
919{
06f814a3
TM		 920 int ret;
921
06f814a3 922 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 923 return ret;
924}
925
dc0b027d 926static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 927{
928 int ret = 0;
dc0b027d 929
536e43d1 930 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 931 goto out;
932 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 933 case FMODE_READ:
88069f77
TM		 934 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
935 && state->n_rdonly != 0;
6ee41268
TM		 936 break;
937 case FMODE_WRITE:
88069f77
TM		 938 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
939 && state->n_wronly != 0;
6ee41268
TM		 940 break;
941 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 942 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
943 && state->n_rdwr != 0;
6ee41268 944 }
dc0b027d 945out:
6ee41268
TM		 946 return ret;
947}
948
dc0b027d 949static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 950{
652f89f6
TM		 951 if (delegation == NULL)
952 return 0;
dc0b027d 953 if ((delegation->type & fmode) != fmode)
aac00a8d 954 return 0;
15c831bf 955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 956 return 0;
b7391f44 957 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 958 return 1;
959}
960
dc0b027d 961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 962{
dc0b027d 963 switch (fmode) {
e7616923
TM		 964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
dc0b027d 973 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 974}
975
dc0b027d 976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 981 switch (fmode) {
003707c7
TM		 982 case FMODE_READ:
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 break;
985 case FMODE_WRITE:
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
990 }
e7616923
TM		 991}
992
dc0b027d 993static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 994{
8bda4e4c 995 write_seqlock(&state->seqlock);
dc0b027d 996 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 997 write_sequnlock(&state->seqlock);
003707c7
TM		 998}
999
dc0b027d 1000static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1001{
8bda4e4c
TM		 1002 /*
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1005 */
1006 write_seqlock(&state->seqlock);
003707c7 1007 if (deleg_stateid != NULL) {
f597c537 1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1010 }
1011 if (open_stateid != NULL)
dc0b027d 1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
dc0b027d 1015 update_open_stateflags(state, fmode);
ec073428 1016 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1017}
1018
dc0b027d 1019static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1020{
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1023 int ret = 0;
1024
dc0b027d 1025 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1026
1027 rcu_read_lock();
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1030 goto no_delegation;
1031
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
dc0b027d 1034 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1035 goto no_delegation_unlock;
1036
1037 if (delegation == NULL)
1038 delegation = &deleg_cur->stateid;
f597c537 1039 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1040 goto no_delegation_unlock;
1041
b7391f44 1042 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1043 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1044 ret = 1;
1045no_delegation_unlock:
1046 spin_unlock(&deleg_cur->lock);
1047no_delegation:
1048 rcu_read_unlock();
1049
1050 if (!ret && open_stateid != NULL) {
dc0b027d 1051 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1052 ret = 1;
1053 }
1054
1055 return ret;
1056}
1057
1058
dc0b027d 1059static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1060{
1061 struct nfs_delegation *delegation;
1062
1063 rcu_read_lock();
1064 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1065 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1066 rcu_read_unlock();
1067 return;
1068 }
1069 rcu_read_unlock();
57ec14c5 1070 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1071}
1072
6ee41268 1073static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1074{
1075 struct nfs4_state *state = opendata->state;
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_delegation *delegation;
536e43d1 1078 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1079 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1080 nfs4_stateid stateid;
1081 int ret = -EAGAIN;
1082
aac00a8d 1083 for (;;) {
dc0b027d 1084 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1085 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1086 if (can_open_cached(state, fmode, open_mode)) {
1087 update_open_stateflags(state, fmode);
6ee41268 1088 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1089 goto out_return_state;
1090 }
1091 spin_unlock(&state->owner->so_lock);
1092 }
34310430
TM		 1093 rcu_read_lock();
1094 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1095 if (!can_open_delegated(delegation, fmode)) {
34310430 1096 rcu_read_unlock();
aac00a8d 1097 break;
34310430 1098 }
aac00a8d 1099 /* Save the delegation */
f597c537 1100 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1101 rcu_read_unlock();
af22f94a 1102 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1103 if (ret != 0)
1104 goto out;
1105 ret = -EAGAIN;
34310430
TM		 1106
1107 /* Try to update the stateid using the delegation */
dc0b027d 1108 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1109 goto out_return_state;
aac00a8d 1110 }
aac00a8d
TM		 1111out:
1112 return ERR_PTR(ret);
1113out_return_state:
1114 atomic_inc(&state->count);
1115 return state;
1116}
1117
24ac23ab
TM		 1118static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1119{
1120 struct inode *inode;
1121 struct nfs4_state *state = NULL;
003707c7 1122 struct nfs_delegation *delegation;
1b370bc2 1123 int ret;
24ac23ab 1124
aac00a8d 1125 if (!data->rpc_done) {
6ee41268 1126 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1127 goto out;
1128 }
1129
1b370bc2 1130 ret = -EAGAIN;
24ac23ab 1131 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1132 goto err;
24ac23ab 1133 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1134 ret = PTR_ERR(inode);
03f28e3a 1135 if (IS_ERR(inode))
1b370bc2
TM		 1136 goto err;
1137 ret = -ENOMEM;
24ac23ab
TM		 1138 state = nfs4_get_open_state(inode, data->owner);
1139 if (state == NULL)
1b370bc2 1140 goto err_put_inode;
549d6ed5 1141 if (data->o_res.delegation_type != 0) {
4e0038b6 1142 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
549d6ed5
TM		 1143 int delegation_flags = 0;
1144
003707c7
TM		 1145 rcu_read_lock();
1146 delegation = rcu_dereference(NFS_I(inode)->delegation);
1147 if (delegation)
1148 delegation_flags = delegation->flags;
1149 rcu_read_unlock();
652f89f6
TM		 1150 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
4e0038b6 1154 clp->cl_hostname);
652f89f6 1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1156 nfs_inode_set_delegation(state->inode,
1157 data->owner->so_cred,
1158 &data->o_res);
1159 else
1160 nfs_inode_reclaim_delegation(state->inode,
1161 data->owner->so_cred,
1162 &data->o_res);
1163 }
34310430
TM		 1164
1165 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1166 data->o_arg.fmode);
24ac23ab 1167 iput(inode);
aac00a8d 1168out:
24ac23ab 1169 return state;
1b370bc2
TM		 1170err_put_inode:
1171 iput(inode);
1172err:
1173 return ERR_PTR(ret);
24ac23ab
TM		 1174}
1175
864472e9
TM		 1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
6f220ed5
TM		 1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
3d4ff43d 1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
dc0b027d 1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1206{
2ced46c2 1207 struct nfs4_state *newstate;
864472e9
TM		 1208 int ret;
1209
dc0b027d
TM		 1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
b257957e 1215 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1216 if (ret != 0)
1217 return ret;
2ced46c2 1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
643168c2 1221 nfs4_close_state(newstate, fmode);
2ced46c2 1222 *res = newstate;
864472e9
TM		 1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
864472e9 1228 struct nfs4_state *newstate;
864472e9
TM		 1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
2ced46c2 1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
b0ed9dbc 1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1237 if (ret != 0)
1238 return ret;
2ced46c2
TM		 1239 if (newstate != state)
1240 return -ESTALE;
864472e9
TM		 1241 }
1242 if (state->n_wronly != 0) {
b0ed9dbc 1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1245 if (ret != 0)
1246 return ret;
2ced46c2
TM		 1247 if (newstate != state)
1248 return -ESTALE;
864472e9
TM		 1249 }
1250 if (state->n_rdonly != 0) {
b0ed9dbc 1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1253 if (ret != 0)
1254 return ret;
2ced46c2
TM		 1255 if (newstate != state)
1256 return -ESTALE;
864472e9 1257 }
1ac7e2fd
TM		 1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1264 write_seqlock(&state->seqlock);
1ac7e2fd 1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1267 write_sequnlock(&state->seqlock);
1ac7e2fd 1268 }
864472e9
TM		 1269 return 0;
1270}
1271
1da177e4
LT		 1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1da177e4 1275 */
539cd03a 1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1277{
1ac7e2fd 1278 struct nfs_delegation *delegation;
864472e9 1279 struct nfs4_opendata *opendata;
dc0b027d 1280 fmode_t delegation_type = 0;
1da177e4
LT		 1281 int status;
1282
6f220ed5
TM		 1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
864472e9
TM		 1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1291 delegation_type = delegation->type;
1ac7e2fd 1292 rcu_read_unlock();
864472e9
TM		 1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
c6d00e63 1295 nfs4_opendata_put(opendata);
1da177e4
LT		 1296 return status;
1297}
1298
539cd03a 1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
539cd03a 1305 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1306 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1309 } while (exception.retry);
1310 return err;
1311}
1312
864472e9
TM		 1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
539cd03a 1321 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
13437e12 1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1327{
e56e0b78 1328 struct nfs4_opendata *opendata;
864472e9 1329 int ret;
1da177e4 1330
6f220ed5
TM		 1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
e56e0b78 1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1336 ret = nfs4_open_recover(opendata, state);
c6d00e63 1337 nfs4_opendata_put(opendata);
864472e9 1338 return ret;
1da177e4
LT		 1339}
1340
13437e12 1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1342{
1343 struct nfs4_exception exception = { };
539cd03a 1344 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1345 int err;
1346 do {
13437e12 1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1348 switch (err) {
1349 case 0:
965b5d67
TM		 1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
bcfa49f6
RL		 1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
9f594791 1358 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1359 goto out;
1da177e4
LT		 1360 case -NFS4ERR_STALE_CLIENTID:
1361 case -NFS4ERR_STALE_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 /* Don't recall a delegation if it was lost */
0400a6b0 1364 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1365 goto out;
1366 case -ERESTARTSYS:
1367 /*
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1370 */
a1d0b5ee 1371 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1372 case -NFS4ERR_ADMIN_REVOKED:
1373 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1374 nfs_inode_find_state_and_recover(state->inode,
1375 stateid);
0400a6b0 1376 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1377 case -EKEYEXPIRED:
1378 /*
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1382 * proceed.
1383 */
965b5d67
TM		 1384 case -ENOMEM:
1385 err = 0;
1386 goto out;
1da177e4
LT		 1387 }
1388 err = nfs4_handle_exception(server, err, &exception);
1389 } while (exception.retry);
965b5d67 1390out:
1da177e4
LT		 1391 return err;
1392}
1393
cdd4e68b
TM		 1394static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1395{
1396 struct nfs4_opendata *data = calldata;
1397
1398 data->rpc_status = task->tk_status;
26e976a8 1399 if (data->rpc_status == 0) {
f597c537 1400 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1401 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1402 renew_lease(data->o_res.server, data->timestamp);
3e309914 1403 data->rpc_done = 1;
26e976a8 1404 }
cdd4e68b
TM		 1405}
1406
1407static void nfs4_open_confirm_release(void *calldata)
1408{
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1411
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1414 goto out_free;
1415 /* In case of error, no cleanup! */
3e309914 1416 if (!data->rpc_done)
cdd4e68b 1417 goto out_free;
cdd4e68b 1418 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1419 if (!IS_ERR(state))
643168c2 1420 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1421out_free:
c6d00e63 1422 nfs4_opendata_put(data);
cdd4e68b
TM		 1423}
1424
1425static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1426 .rpc_call_done = nfs4_open_confirm_done,
1427 .rpc_release = nfs4_open_confirm_release,
1428};
1429
1430/*
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1432 */
1433static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1434{
1435 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1436 struct rpc_task *task;
5138fde0
TM		 1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1439 .rpc_argp = &data->c_arg,
1440 .rpc_resp = &data->c_res,
1441 .rpc_cred = data->owner->so_cred,
1442 };
c970aa85
TM		 1443 struct rpc_task_setup task_setup_data = {
1444 .rpc_client = server->client,
5138fde0 1445 .rpc_message = &msg,
c970aa85
TM		 1446 .callback_ops = &nfs4_open_confirm_ops,
1447 .callback_data = data,
101070ca 1448 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1449 .flags = RPC_TASK_ASYNC,
1450 };
1da177e4
LT		 1451 int status;
1452
c6d00e63 1453 kref_get(&data->kref);
3e309914
TM		 1454 data->rpc_done = 0;
1455 data->rpc_status = 0;
5138fde0 1456 data->timestamp = jiffies;
c970aa85 1457 task = rpc_run_task(&task_setup_data);
7a1218a2 1458 if (IS_ERR(task))
cdd4e68b 1459 return PTR_ERR(task);
cdd4e68b
TM		 1460 status = nfs4_wait_for_completion_rpc_task(task);
1461 if (status != 0) {
1462 data->cancelled = 1;
1463 smp_wmb();
1464 } else
1465 status = data->rpc_status;
e6b3c4db 1466 rpc_put_task(task);
1da177e4
LT		 1467 return status;
1468}
1469
24ac23ab 1470static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1471{
24ac23ab
TM		 1472 struct nfs4_opendata *data = calldata;
1473 struct nfs4_state_owner *sp = data->owner;
5138fde0 1474
24ac23ab
TM		 1475 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1476 return;
aac00a8d
TM		 1477 /*
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1480 */
1481 if (data->state != NULL) {
1482 struct nfs_delegation *delegation;
1483
dc0b027d 1484 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1485 goto out_no_action;
aac00a8d
TM		 1486 rcu_read_lock();
1487 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1488 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1489 can_open_delegated(delegation, data->o_arg.fmode))
1490 goto unlock_no_action;
aac00a8d
TM		 1491 rcu_read_unlock();
1492 }
95b72eb0 1493 /* Update client id. */
1f0e890d 1494 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1495 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1496 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1497 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1498 }
26e976a8 1499 data->timestamp = jiffies;
035168ab 1500 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1501 &data->o_arg.seq_args,
9d12b216 1502 &data->o_res.seq_res, task))
d898528c 1503 return;
5138fde0 1504 rpc_call_start(task);
6ee41268 1505 return;
652f89f6
TM		 1506unlock_no_action:
1507 rcu_read_unlock();
6ee41268
TM		 1508out_no_action:
1509 task->tk_action = NULL;
1510
24ac23ab 1511}
1da177e4 1512
b257957e
AB		 1513static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1514{
1515 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1516 nfs4_open_prepare(task, calldata);
1517}
1518
24ac23ab
TM		 1519static void nfs4_open_done(struct rpc_task *task, void *calldata)
1520{
1521 struct nfs4_opendata *data = calldata;
1da177e4 1522
24ac23ab 1523 data->rpc_status = task->tk_status;
d898528c 1524
14516c3a
TM		 1525 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1526 return;
d898528c 1527
24ac23ab
TM		 1528 if (task->tk_status == 0) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1530 case S_IFREG:
1531 break;
1532 case S_IFLNK:
24ac23ab 1533 data->rpc_status = -ELOOP;
6f926b5b
TM		 1534 break;
1535 case S_IFDIR:
24ac23ab 1536 data->rpc_status = -EISDIR;
6f926b5b
TM		 1537 break;
1538 default:
24ac23ab 1539 data->rpc_status = -ENOTDIR;
6f926b5b 1540 }
26e976a8 1541 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1542 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1543 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1544 }
3e309914 1545 data->rpc_done = 1;
24ac23ab 1546}
6f926b5b 1547
24ac23ab
TM		 1548static void nfs4_open_release(void *calldata)
1549{
1550 struct nfs4_opendata *data = calldata;
1551 struct nfs4_state *state = NULL;
1552
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data->cancelled == 0)
1555 goto out_free;
1556 /* In case of error, no cleanup! */
3e309914 1557 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1558 goto out_free;
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1561 goto out_free;
24ac23ab 1562 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1563 if (!IS_ERR(state))
643168c2 1564 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1565out_free:
c6d00e63 1566 nfs4_opendata_put(data);
24ac23ab
TM		 1567}
1568
1569static const struct rpc_call_ops nfs4_open_ops = {
1570 .rpc_call_prepare = nfs4_open_prepare,
1571 .rpc_call_done = nfs4_open_done,
1572 .rpc_release = nfs4_open_release,
1573};
1574
b257957e
AB		 1575static const struct rpc_call_ops nfs4_recover_open_ops = {
1576 .rpc_call_prepare = nfs4_recover_open_prepare,
1577 .rpc_call_done = nfs4_open_done,
1578 .rpc_release = nfs4_open_release,
1579};
1580
1581static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1582{
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 struct rpc_task *task;
5138fde0
TM		 1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1590 .rpc_argp = o_arg,
1591 .rpc_resp = o_res,
1592 .rpc_cred = data->owner->so_cred,
1593 };
c970aa85
TM		 1594 struct rpc_task_setup task_setup_data = {
1595 .rpc_client = server->client,
5138fde0 1596 .rpc_message = &msg,
c970aa85
TM		 1597 .callback_ops = &nfs4_open_ops,
1598 .callback_data = data,
101070ca 1599 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1600 .flags = RPC_TASK_ASYNC,
1601 };
24ac23ab
TM		 1602 int status;
1603
9d12b216 1604 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1605 kref_get(&data->kref);
3e309914
TM		 1606 data->rpc_done = 0;
1607 data->rpc_status = 0;
2ced46c2 1608 data->cancelled = 0;
b257957e
AB		 1609 if (isrecover)
1610 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1611 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1612 if (IS_ERR(task))
1613 return PTR_ERR(task);
1614 status = nfs4_wait_for_completion_rpc_task(task);
1615 if (status != 0) {
1616 data->cancelled = 1;
1617 smp_wmb();
1618 } else
1619 status = data->rpc_status;
1620 rpc_put_task(task);
1621
1622 return status;
1623}
1624
1625static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1626{
1627 struct inode *dir = data->dir->d_inode;
1628 struct nfs_openres *o_res = &data->o_res;
1629 int status;
1630
1631 status = nfs4_run_open_task(data, 1);
1632 if (status != 0 || !data->rpc_done)
1633 return status;
1634
6926afd1
TM		 1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1636
b257957e
AB		 1637 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1639 if (status != 0)
1640 return status;
1641 }
1642
1643 return status;
1644}
1645
1646/*
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1648 */
1649static int _nfs4_proc_open(struct nfs4_opendata *data)
1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 int status;
1656
1657 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1658 if (!data->rpc_done)
1659 return status;
1660 if (status != 0) {
1661 if (status == -NFS4ERR_BADNAME &&
1662 !(o_arg->open_flags & O_CREAT))
1663 return -ENOENT;
24ac23ab 1664 return status;
08ef7bd3 1665 }
24ac23ab 1666
6926afd1
TM		 1667 nfs_fattr_map_and_free_names(server, &data->f_attr);
1668
90ff0c54 1669 if (o_arg->open_flags & O_CREAT)
56ae19f3 1670 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1671 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1672 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1673 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1674 status = _nfs4_proc_open_confirm(data);
1da177e4 1675 if (status != 0)
24ac23ab 1676 return status;
1da177e4
LT		 1677 }
1678 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1679 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1680 return 0;
1da177e4
LT		 1681}
1682
d83217c1 1683static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1684{
a78cb57a 1685 unsigned int loop;
6b30954e 1686 int ret;
58d9714a 1687
a78cb57a 1688 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1689 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1690 if (ret != 0)
a78cb57a 1691 break;
e598d843
TM		 1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1694 break;
0400a6b0 1695 nfs4_schedule_state_manager(clp);
a78cb57a 1696 ret = -EIO;
6b30954e 1697 }
a78cb57a 1698 return ret;
58d9714a
TM		 1699}
1700
d83217c1
AA		 1701static int nfs4_recover_expired_lease(struct nfs_server *server)
1702{
1703 return nfs4_client_recover_expired_lease(server->nfs_client);
1704}
1705
1da177e4
LT		 1706/*
1707 * OPEN_EXPIRED:
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1710 */
539cd03a 1711static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1712{
e56e0b78 1713 struct nfs4_opendata *opendata;
864472e9 1714 int ret;
1da177e4 1715
6f220ed5
TM		 1716 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1717 if (IS_ERR(opendata))
1718 return PTR_ERR(opendata);
864472e9 1719 ret = nfs4_open_recover(opendata, state);
35d05778 1720 if (ret == -ESTALE)
3d4ff43d 1721 d_drop(ctx->dentry);
c6d00e63 1722 nfs4_opendata_put(opendata);
864472e9 1723 return ret;
1da177e4
LT		 1724}
1725
a9ed2e25 1726static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1727{
539cd03a 1728 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1729 struct nfs4_exception exception = { };
1730 int err;
1731
1732 do {
539cd03a 1733 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1734 switch (err) {
1735 default:
1736 goto out;
1737 case -NFS4ERR_GRACE:
1738 case -NFS4ERR_DELAY:
1739 nfs4_handle_exception(server, err, &exception);
1740 err = 0;
1741 }
202b50dc 1742 } while (exception.retry);
a9ed2e25 1743out:
202b50dc
TM		 1744 return err;
1745}
1746
1da177e4
LT		 1747static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1748{
1da177e4 1749 struct nfs_open_context *ctx;
864472e9 1750 int ret;
1da177e4 1751
864472e9
TM		 1752 ctx = nfs4_state_find_open_context(state);
1753 if (IS_ERR(ctx))
1754 return PTR_ERR(ctx);
539cd03a 1755 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1756 put_nfs_open_context(ctx);
1757 return ret;
1da177e4
LT		 1758}
1759
f062eb6c 1760#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1761static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1762{
f062eb6c 1763 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1764 nfs4_stateid *stateid = &state->stateid;
1765 int status;
1766
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1769 return;
1770
1771 status = nfs41_test_stateid(server, stateid);
1772 if (status != NFS_OK) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status != -NFS4ERR_BAD_STATEID)
1776 nfs41_free_stateid(server, stateid);
1777
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1779 }
1780}
1781
1782/**
1783 * nfs41_check_open_stateid - possibly free an open stateid
1784 *
1785 * @state: NFSv4 state for an inode
1786 *
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1789 */
1790static int nfs41_check_open_stateid(struct nfs4_state *state)
1791{
1792 struct nfs_server *server = NFS_SERVER(state->inode);
1793 nfs4_stateid *stateid = &state->stateid;
1794 int status;
1795
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1801
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1808
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1812 }
1813 return status;
1814}
1815
1816static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1817{
eb64cf96 1818 int status;
b01dd1d8 1819
3e60ffdd
CL		 1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1824 return status;
f062eb6c
BS		 1825}
1826#endif
1827
aa53ed54
JL		 1828/*
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1832 */
1833static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1834{
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1838
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1842}
1843
1da177e4 1844/*
24ac23ab 1845 * Returns a referenced nfs4_state
1da177e4 1846 */
82be417a
AA		 1847static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1849 fmode_t fmode,
1850 int flags,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1855{
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1859 struct nfs4_opendata *opendata;
aac00a8d 1860 int status;
1da177e4
LT		 1861
1862 /* Protect against reboot recovery conflicts */
1da177e4 1863 status = -ENOMEM;
d1e284d5
TM		 1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1865 if (sp == NULL) {
1da177e4
LT		 1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1867 goto out_err;
1868 }
58d9714a
TM		 1869 status = nfs4_recover_expired_lease(server);
1870 if (status != 0)
b4454fe1 1871 goto err_put_state_owner;
82a2c1b7
AV		 1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1874 status = -ENOMEM;
82a2c1b7 1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1876 if (opendata == NULL)
95d35cb4 1877 goto err_put_state_owner;
1da177e4 1878
82be417a
AA		 1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1549210f 1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1884 }
82a2c1b7
AV		 1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1887
24ac23ab 1888 status = _nfs4_proc_open(opendata);
1da177e4 1889 if (status != 0)
c6d00e63 1890 goto err_opendata_put;
1da177e4 1891
24ac23ab 1892 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1893 status = PTR_ERR(state);
1894 if (IS_ERR(state))
c6d00e63 1895 goto err_opendata_put;
0df5dd4a 1896 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1898
1899 if (opendata->o_arg.open_flags & O_EXCL) {
1900 nfs4_exclusive_attrset(opendata, sattr);
1901
1902 nfs_fattr_init(opendata->o_res.f_attr);
1903 status = nfs4_do_setattr(state->inode, cred,
1904 opendata->o_res.f_attr, sattr,
1905 state);
1906 if (status == 0)
1907 nfs_setattr_update_inode(state->inode, sattr);
1908 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1909 }
82be417a
AA		 1910
1911 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1912 *ctx_th = opendata->f_attr.mdsthreshold;
1913 else
1914 kfree(opendata->f_attr.mdsthreshold);
1915 opendata->f_attr.mdsthreshold = NULL;
1916
c6d00e63 1917 nfs4_opendata_put(opendata);
1da177e4 1918 nfs4_put_state_owner(sp);
1da177e4
LT		 1919 *res = state;
1920 return 0;
c6d00e63 1921err_opendata_put:
82be417a 1922 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1923 nfs4_opendata_put(opendata);
e56e0b78
TM		 1924err_put_state_owner:
1925 nfs4_put_state_owner(sp);
1da177e4 1926out_err:
1da177e4
LT		 1927 *res = NULL;
1928 return status;
1929}
1930
1931
82be417a
AA		 1932static struct nfs4_state *nfs4_do_open(struct inode *dir,
1933 struct dentry *dentry,
1934 fmode_t fmode,
1935 int flags,
1936 struct iattr *sattr,
1937 struct rpc_cred *cred,
1938 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1939{
1940 struct nfs4_exception exception = { };
1941 struct nfs4_state *res;
1942 int status;
1943
2d0dbc6a 1944 fmode &= FMODE_READ|FMODE_WRITE;
1da177e4 1945 do {
82be417a
AA		 1946 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1947 &res, ctx_th);
1da177e4
LT		 1948 if (status == 0)
1949 break;
1950 /* NOTE: BAD_SEQID means the server and client disagree about the
1951 * book-keeping w.r.t. state-changing operations
1952 * (OPEN/CLOSE/LOCK/LOCKU...)
1953 * It is actually a sign of a bug on the client or on the server.
1954 *
1955 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1956 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1957 * have unhashed the old state_owner for us, and that we can
1958 * therefore safely retry using a new one. We should still warn
1959 * the user though...
1960 */
1961 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1962 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1963 " returned a bad sequence-id error!\n",
1964 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1965 exception.retry = 1;
1966 continue;
1967 }
550f5747
TM		 1968 /*
1969 * BAD_STATEID on OPEN means that the server cancelled our
1970 * state before it received the OPEN_CONFIRM.
1971 * Recover by retrying the request as per the discussion
1972 * on Page 181 of RFC3530.
1973 */
1974 if (status == -NFS4ERR_BAD_STATEID) {
1975 exception.retry = 1;
1976 continue;
1977 }
aac00a8d
TM		 1978 if (status == -EAGAIN) {
1979 /* We must have found a delegation */
1980 exception.retry = 1;
1981 continue;
1982 }
1da177e4
LT		 1983 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1984 status, &exception));
1985 } while (exception.retry);
1986 return res;
1987}
1988
659bfcd6
TM		 1989static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1990 struct nfs_fattr *fattr, struct iattr *sattr,
1991 struct nfs4_state *state)
1da177e4 1992{
3e4f6290 1993 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1994 struct nfs_setattrargs arg = {
3e4f6290 1995 .fh = NFS_FH(inode),
1da177e4
LT		 1996 .iap = sattr,
1997 .server = server,
1998 .bitmask = server->attr_bitmask,
1999 };
2000 struct nfs_setattrres res = {
2001 .fattr = fattr,
2002 .server = server,
2003 };
2004 struct rpc_message msg = {
659bfcd6
TM		 2005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2006 .rpc_argp = &arg,
2007 .rpc_resp = &res,
2008 .rpc_cred = cred,
1da177e4 2009 };
26e976a8 2010 unsigned long timestamp = jiffies;
65e4308d 2011 int status;
1da177e4 2012
0e574af1 2013 nfs_fattr_init(fattr);
1da177e4 2014
4fc8796d 2015 if (state != NULL) {
2a369153
TM		 2016 struct nfs_lockowner lockowner = {
2017 .l_owner = current->files,
2018 .l_pid = current->tgid,
2019 };
4fc8796d 2020 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2021 &lockowner);
4fc8796d
TM		 2022 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2023 FMODE_WRITE)) {
3e4f6290 2024 /* Use that stateid */
08e9eac4 2025 } else
f597c537 2026 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2027
7c513058 2028 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2029 if (status == 0 && state != NULL)
2030 renew_lease(server, timestamp);
65e4308d 2031 return status;
1da177e4
LT		 2032}
2033
659bfcd6
TM		 2034static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2035 struct nfs_fattr *fattr, struct iattr *sattr,
2036 struct nfs4_state *state)
1da177e4 2037{
3e4f6290 2038 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2039 struct nfs4_exception exception = {
2040 .state = state,
3114ea7a 2041 .inode = inode,
a1d0b5ee 2042 };
1da177e4
LT		 2043 int err;
2044 do {
451146be
TM		 2045 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2046 switch (err) {
2047 case -NFS4ERR_OPENMODE:
2048 if (state && !(state->state & FMODE_WRITE)) {
2049 err = -EBADF;
2050 if (sattr->ia_valid & ATTR_OPEN)
2051 err = -EACCES;
2052 goto out;
2053 }
2054 }
2055 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2056 } while (exception.retry);
451146be 2057out:
1da177e4
LT		 2058 return err;
2059}
2060
2061struct nfs4_closedata {
2062 struct inode *inode;
2063 struct nfs4_state *state;
2064 struct nfs_closeargs arg;
2065 struct nfs_closeres res;
516a6af6 2066 struct nfs_fattr fattr;
26e976a8 2067 unsigned long timestamp;
f7e8917a
FI		 2068 bool roc;
2069 u32 roc_barrier;
1da177e4
LT		 2070};
2071
963d8fe5 2072static void nfs4_free_closedata(void *data)
9512135d 2073{
963d8fe5
TM		 2074 struct nfs4_closedata *calldata = data;
2075 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2076 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2077
f7e8917a
FI		 2078 if (calldata->roc)
2079 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2080 nfs4_put_open_state(calldata->state);
2081 nfs_free_seqid(calldata->arg.seqid);
9512135d 2082 nfs4_put_state_owner(sp);
643168c2 2083 nfs_sb_deactive(sb);
9512135d
TM		 2084 kfree(calldata);
2085}
2086
88069f77
TM		 2087static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2088 fmode_t fmode)
2089{
2090 spin_lock(&state->owner->so_lock);
2091 if (!(fmode & FMODE_READ))
2092 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2093 if (!(fmode & FMODE_WRITE))
2094 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2095 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2096 spin_unlock(&state->owner->so_lock);
2097}
2098
963d8fe5 2099static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2100{
963d8fe5 2101 struct nfs4_closedata *calldata = data;
1da177e4 2102 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2103 struct nfs_server *server = NFS_SERVER(calldata->inode);
2104
a3ca5651 2105 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2106 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2107 return;
1da177e4
LT		 2108 /* hmm. we are done with the inode, and in the process of freeing
2109 * the state_owner. we keep this around to process errors
2110 */
1da177e4
LT		 2111 switch (task->tk_status) {
2112 case 0:
f7e8917a
FI		 2113 if (calldata->roc)
2114 pnfs_roc_set_barrier(state->inode,
2115 calldata->roc_barrier);
45328c35 2116 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2117 renew_lease(server, calldata->timestamp);
88069f77
TM		 2118 nfs4_close_clear_stateid_flags(state,
2119 calldata->arg.fmode);
1da177e4
LT		 2120 break;
2121 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2122 case -NFS4ERR_OLD_STATEID:
2123 case -NFS4ERR_BAD_STATEID:
1da177e4 2124 case -NFS4ERR_EXPIRED:
dc0b027d 2125 if (calldata->arg.fmode == 0)
9e33bed5 2126 break;
1da177e4 2127 default:
72211dbe
TM		 2128 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2129 rpc_restart_call_prepare(task);
1da177e4 2130 }
72211dbe 2131 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2132 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2133 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2134}
2135
4ce70ada 2136static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2137{
4ce70ada 2138 struct nfs4_closedata *calldata = data;
9512135d 2139 struct nfs4_state *state = calldata->state;
88069f77 2140 int call_close = 0;
9512135d 2141
a3ca5651 2142 dprintk("%s: begin!\n", __func__);
963d8fe5 2143 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2144 return;
003707c7 2145
88069f77
TM		 2146 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2147 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2148 spin_lock(&state->owner->so_lock);
003707c7 2149 /* Calculate the change in open mode */
e7616923 2150 if (state->n_rdwr == 0) {
003707c7 2151 if (state->n_rdonly == 0) {
88069f77
TM		 2152 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2153 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2154 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2155 }
2156 if (state->n_wronly == 0) {
88069f77
TM		 2157 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2158 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2159 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2160 }
e7616923 2161 }
4cecb76f 2162 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2163
2164 if (!call_close) {
963d8fe5
TM		 2165 /* Note: exit _without_ calling nfs4_close_done */
2166 task->tk_action = NULL;
a3ca5651 2167 goto out;
9512135d 2168 }
88069f77 2169
f7e8917a 2170 if (calldata->arg.fmode == 0) {
88069f77 2171 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2172 if (calldata->roc &&
2173 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2174 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2175 task, NULL);
a3ca5651 2176 goto out;
f7e8917a
FI		 2177 }
2178 }
88069f77 2179
516a6af6 2180 nfs_fattr_init(calldata->res.fattr);
26e976a8 2181 calldata->timestamp = jiffies;
035168ab 2182 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
9d12b216
TM		 2183 &calldata->arg.seq_args,
2184 &calldata->res.seq_res,
2185 task))
a3ca5651 2186 goto out;
5138fde0 2187 rpc_call_start(task);
a3ca5651
CL		 2188out:
2189 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2190}
2191
963d8fe5 2192static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2193 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2194 .rpc_call_done = nfs4_close_done,
2195 .rpc_release = nfs4_free_closedata,
2196};
2197
1da177e4
LT		 2198/*
2199 * It is possible for data to be read/written from a mem-mapped file
2200 * after the sys_close call (which hits the vfs layer as a flush).
2201 * This means that we can't safely call nfsv4 close on a file until
2202 * the inode is cleared. This in turn means that we are not good
2203 * NFSv4 citizens - we do not indicate to the server to update the file's
2204 * share state even when we are done with one of the three share
2205 * stateid's in the inode.
2206 *
2207 * NOTE: Caller must be holding the sp->so_owner semaphore!
2208 */
643168c2 2209int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2210{
4a35bd41 2211 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2212 struct nfs4_closedata *calldata;
b39e625b
TM		 2213 struct nfs4_state_owner *sp = state->owner;
2214 struct rpc_task *task;
5138fde0
TM		 2215 struct rpc_message msg = {
2216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2217 .rpc_cred = state->owner->so_cred,
2218 };
c970aa85
TM		 2219 struct rpc_task_setup task_setup_data = {
2220 .rpc_client = server->client,
5138fde0 2221 .rpc_message = &msg,
c970aa85 2222 .callback_ops = &nfs4_close_ops,
101070ca 2223 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2224 .flags = RPC_TASK_ASYNC,
2225 };
9512135d 2226 int status = -ENOMEM;
1da177e4 2227
8535b2be 2228 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2229 if (calldata == NULL)
9512135d 2230 goto out;
9d12b216 2231 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2232 calldata->inode = state->inode;
1da177e4 2233 calldata->state = state;
4a35bd41 2234 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2235 calldata->arg.stateid = &state->open_stateid;
1da177e4 2236 /* Serialization for the sequence id */
8535b2be 2237 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2238 if (calldata->arg.seqid == NULL)
2239 goto out_free_calldata;
dc0b027d 2240 calldata->arg.fmode = 0;
a65318bf 2241 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2242 calldata->res.fattr = &calldata->fattr;
c1d51931 2243 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2244 calldata->res.server = server;
f7e8917a 2245 calldata->roc = roc;
643168c2 2246 nfs_sb_active(calldata->inode->i_sb);
9512135d 2247
1174dd1f
TM		 2248 msg.rpc_argp = &calldata->arg;
2249 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2250 task_setup_data.callback_data = calldata;
2251 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2252 if (IS_ERR(task))
2253 return PTR_ERR(task);
a49c3c77
TM		 2254 status = 0;
2255 if (wait)
2256 status = rpc_wait_for_completion_task(task);
b39e625b 2257 rpc_put_task(task);
a49c3c77 2258 return status;
9512135d
TM		 2259out_free_calldata:
2260 kfree(calldata);
2261out:
f7e8917a
FI		 2262 if (roc)
2263 pnfs_roc_release(state->inode);
b39e625b
TM		 2264 nfs4_put_open_state(state);
2265 nfs4_put_state_owner(sp);
9512135d 2266 return status;
1da177e4
LT		 2267}
2268
2b484297 2269static struct inode *
cd9a1c0e 2270nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2271{
1da177e4 2272 struct nfs4_state *state;
1da177e4 2273
565277f6 2274 /* Protect against concurrent sillydeletes */
82be417a
AA		 2275 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2276 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2277 if (IS_ERR(state))
2278 return ERR_CAST(state);
cd9a1c0e 2279 ctx->state = state;
f46e0bd3 2280 return igrab(state->inode);
1da177e4
LT		 2281}
2282
1185a552 2283static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2284{
2285 if (ctx->state == NULL)
2286 return;
2287 if (is_sync)
643168c2 2288 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2289 else
643168c2 2290 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2291}
1da177e4
LT		 2292
2293static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2294{
43652ad5
BH		 2295 struct nfs4_server_caps_arg args = {
2296 .fhandle = fhandle,
2297 };
1da177e4
LT		 2298 struct nfs4_server_caps_res res = {};
2299 struct rpc_message msg = {
2300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2301 .rpc_argp = &args,
1da177e4
LT		 2302 .rpc_resp = &res,
2303 };
2304 int status;
2305
7c513058 2306 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2307 if (status == 0) {
2308 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2309 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2310 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2311 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2312 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2313 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2314 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2315 server->caps |= NFS_CAP_ACLS;
2316 if (res.has_links != 0)
2317 server->caps |= NFS_CAP_HARDLINKS;
2318 if (res.has_symlinks != 0)
2319 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2320 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2321 server->caps |= NFS_CAP_FILEID;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2323 server->caps |= NFS_CAP_MODE;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2325 server->caps |= NFS_CAP_NLINK;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2327 server->caps |= NFS_CAP_OWNER;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2329 server->caps |= NFS_CAP_OWNER_GROUP;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2331 server->caps |= NFS_CAP_ATIME;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2333 server->caps |= NFS_CAP_CTIME;
2334 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2335 server->caps |= NFS_CAP_MTIME;
2336
a65318bf
TM		 2337 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2338 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2339 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2340 server->acl_bitmask = res.acl_bitmask;
264e6351 2341 server->fh_expire_type = res.fh_expire_type;
1da177e4 2342 }
cccef3b9 2343
1da177e4
LT		 2344 return status;
2345}
2346
55a97593 2347int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2348{
2349 struct nfs4_exception exception = { };
2350 int err;
2351 do {
2352 err = nfs4_handle_exception(server,
2353 _nfs4_server_capabilities(server, fhandle),
2354 &exception);
2355 } while (exception.retry);
2356 return err;
2357}
2358
2359static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2360 struct nfs_fsinfo *info)
2361{
1da177e4
LT		 2362 struct nfs4_lookup_root_arg args = {
2363 .bitmask = nfs4_fattr_bitmap,
2364 };
2365 struct nfs4_lookup_res res = {
2366 .server = server,
0e574af1 2367 .fattr = info->fattr,
1da177e4
LT		 2368 .fh = fhandle,
2369 };
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
2374 };
008f55d0 2375
0e574af1 2376 nfs_fattr_init(info->fattr);
7c513058 2377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2378}
2379
2380static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2382{
2383 struct nfs4_exception exception = { };
2384 int err;
2385 do {
fb8a5ba8
BS		 2386 err = _nfs4_lookup_root(server, fhandle, info);
2387 switch (err) {
2388 case 0:
2389 case -NFS4ERR_WRONGSEC:
05e9cfb4 2390 goto out;
fb8a5ba8
BS		 2391 default:
2392 err = nfs4_handle_exception(server, err, &exception);
2393 }
1da177e4 2394 } while (exception.retry);
05e9cfb4 2395out:
1da177e4
LT		 2396 return err;
2397}
2398
8f70e95f
BS		 2399static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2401{
2402 struct rpc_auth *auth;
2403 int ret;
2404
2405 auth = rpcauth_create(flavor, server->client);
e8d920c5 2406 if (IS_ERR(auth)) {
8f70e95f
BS		 2407 ret = -EIO;
2408 goto out;
2409 }
2410 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2411out:
2412 return ret;
2413}
2414
801a16dc 2415static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2416 struct nfs_fsinfo *info)
1da177e4 2417{
8f70e95f 2418 int i, len, status = 0;
0fabee24 2419 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2420
6a1a1e34
CL		 2421 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2422 BUG_ON(len < 0);
8f70e95f
BS		 2423
2424 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2425 /* AUTH_UNIX is the default flavor if none was specified,
2426 * thus has already been tried. */
2427 if (flav_array[i] == RPC_AUTH_UNIX)
2428 continue;
2429
8f70e95f 2430 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2431 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2432 continue;
2433 break;
8f70e95f 2434 }
fb8a5ba8
BS		 2435 /*
2436 * -EACCESS could mean that the user doesn't have correct permissions
2437 * to access the mount. It could also mean that we tried to mount
2438 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2439 * existing mount programs don't handle -EACCES very well so it should
2440 * be mapped to -EPERM instead.
2441 */
2442 if (status == -EACCES)
2443 status = -EPERM;
801a16dc
BS		 2444 return status;
2445}
2446
2447/*
2448 * get the file handle for the "/" directory on the server
2449 */
3028eb2b
BS		 2450int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2451 struct nfs_fsinfo *info)
801a16dc 2452{
fca78d6d 2453 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2454 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2455 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2456 /*
2457 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2458 * by nfs4_map_errors() as this function exits.
2459 */
fca78d6d 2460 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2461 if (status == 0)
2462 status = nfs4_server_capabilities(server, fhandle);
2463 if (status == 0)
2464 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2465 return nfs4_map_errors(status);
1da177e4
LT		 2466}
2467
bae36241
BS		 2468static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2469 struct nfs_fsinfo *info)
2470{
2471 int error;
2472 struct nfs_fattr *fattr = info->fattr;
2473
2474 error = nfs4_server_capabilities(server, mntfh);
2475 if (error < 0) {
2476 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2477 return error;
2478 }
2479
2480 error = nfs4_proc_getattr(server, mntfh, fattr);
2481 if (error < 0) {
2482 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2483 return error;
2484 }
2485
2486 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2487 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2488 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2489
2490 return error;
2491}
2492
6b97fd3d
MN		 2493/*
2494 * Get locations and (maybe) other attributes of a referral.
2495 * Note that we'll actually follow the referral later when
2496 * we detect fsid mismatch in inode revalidation
2497 */
f05d147f
BS		 2498static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2499 const struct qstr *name, struct nfs_fattr *fattr,
2500 struct nfs_fh *fhandle)
6b97fd3d
MN		 2501{
2502 int status = -ENOMEM;
2503 struct page *page = NULL;
2504 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2505
2506 page = alloc_page(GFP_KERNEL);
2507 if (page == NULL)
2508 goto out;
2509 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2510 if (locations == NULL)
2511 goto out;
2512
f05d147f 2513 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2514 if (status != 0)
2515 goto out;
2516 /* Make sure server returned a different fsid for the referral */
2517 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2518 dprintk("%s: server did not return a different fsid for"
2519 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2520 status = -EIO;
2521 goto out;
2522 }
533eb461
AA		 2523 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2524 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2525
533eb461 2526 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2527 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2528 memset(fhandle, 0, sizeof(struct nfs_fh));
2529out:
2530 if (page)
2531 __free_page(page);
5d7ca35a 2532 kfree(locations);
6b97fd3d
MN		 2533 return status;
2534}
2535
1da177e4
LT		 2536static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2537{
2538 struct nfs4_getattr_arg args = {
2539 .fh = fhandle,
2540 .bitmask = server->attr_bitmask,
2541 };
2542 struct nfs4_getattr_res res = {
2543 .fattr = fattr,
2544 .server = server,
2545 };
2546 struct rpc_message msg = {
2547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2548 .rpc_argp = &args,
2549 .rpc_resp = &res,
2550 };
2551
0e574af1 2552 nfs_fattr_init(fattr);
7c513058 2553 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2554}
2555
2556static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2557{
2558 struct nfs4_exception exception = { };
2559 int err;
2560 do {
2561 err = nfs4_handle_exception(server,
2562 _nfs4_proc_getattr(server, fhandle, fattr),
2563 &exception);
2564 } while (exception.retry);
2565 return err;
2566}
2567
2568/*
2569 * The file is not closed if it is opened due to the a request to change
2570 * the size of the file. The open call will not be needed once the
2571 * VFS layer lookup-intents are implemented.
2572 *
2573 * Close is called when the inode is destroyed.
2574 * If we haven't opened the file for O_WRONLY, we
2575 * need to in the size_change case to obtain a stateid.
2576 *
2577 * Got race?
2578 * Because OPEN is always done by name in nfsv4, it is
2579 * possible that we opened a different file by the same
2580 * name. We can recognize this race condition, but we
2581 * can't do anything about it besides returning an error.
2582 *
2583 * This will be fixed with VFS changes (lookup-intent).
2584 */
2585static int
2586nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2587 struct iattr *sattr)
2588{
08e9eac4 2589 struct inode *inode = dentry->d_inode;
659bfcd6 2590 struct rpc_cred *cred = NULL;
d530838b 2591 struct nfs4_state *state = NULL;
1da177e4
LT		 2592 int status;
2593
8a1636c4
BH		 2594 if (pnfs_ld_layoutret_on_setattr(inode))
2595 pnfs_return_layout(inode);
2596
0e574af1 2597 nfs_fattr_init(fattr);
1da177e4 2598
2669940d
AA		 2599 /* Deal with open(O_TRUNC) */
2600 if (sattr->ia_valid & ATTR_OPEN)
2601 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2602
2603 /* Optimization: if the end result is no change, don't RPC */
2604 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2605 return 0;
2606
d530838b 2607 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2608 if (sattr->ia_valid & ATTR_FILE) {
2609 struct nfs_open_context *ctx;
2610
2611 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2612 if (ctx) {
2613 cred = ctx->cred;
2614 state = ctx->state;
2615 }
659bfcd6 2616 }
08e9eac4 2617
659bfcd6 2618 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2619 if (status == 0)
2620 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2621 return status;
2622}
2623
0c2e53f1
TM		 2624static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2625 const struct qstr *name, struct nfs_fh *fhandle,
2626 struct nfs_fattr *fattr)
2b3de441 2627{
0c2e53f1 2628 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2629 int status;
2630 struct nfs4_lookup_arg args = {
2631 .bitmask = server->attr_bitmask,
0c2e53f1 2632 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2633 .name = name,
2634 };
2635 struct nfs4_lookup_res res = {
2636 .server = server,
2637 .fattr = fattr,
2638 .fh = fhandle,
2639 };
2640 struct rpc_message msg = {
2641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2642 .rpc_argp = &args,
2643 .rpc_resp = &res,
2644 };
2645
2646 nfs_fattr_init(fattr);
2647
1da177e4 2648 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2649 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2650 dprintk("NFS reply lookup: %d\n", status);
2651 return status;
2652}
2653
72de53ec 2654static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2655{
7ebb9315 2656 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2657 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2658 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2659 fattr->nlink = 2;
2660}
2661
72de53ec
BS		 2662static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2663 struct qstr *name, struct nfs_fh *fhandle,
2664 struct nfs_fattr *fattr)
1da177e4
LT		 2665{
2666 struct nfs4_exception exception = { };
72de53ec 2667 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2668 int err;
2669 do {
72de53ec
BS		 2670 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2671 switch (err) {
08ef7bd3 2672 case -NFS4ERR_BADNAME:
72de53ec
BS		 2673 err = -ENOENT;
2674 goto out;
0c2e53f1 2675 case -NFS4ERR_MOVED:
f05d147f 2676 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2677 goto out;
0c2e53f1 2678 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2679 err = -EPERM;
2680 if (client != *clnt)
2681 goto out;
2682
2683 client = nfs4_create_sec_client(client, dir, name);
2684 if (IS_ERR(client))
2685 return PTR_ERR(client);
2686
2687 exception.retry = 1;
2688 break;
2689 default:
2690 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2691 }
1da177e4 2692 } while (exception.retry);
72de53ec
BS		 2693
2694out:
2695 if (err == 0)
2696 *clnt = client;
2697 else if (client != *clnt)
2698 rpc_shutdown_client(client);
2699
1da177e4
LT		 2700 return err;
2701}
2702
80a16b21 2703static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2704 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2705{
2706 int status;
2707 struct rpc_clnt *client = NFS_CLIENT(dir);
2708
2709 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2710 if (client != NFS_CLIENT(dir)) {
2711 rpc_shutdown_client(client);
2712 nfs_fixup_secinfo_attributes(fattr);
2713 }
2714 return status;
2715}
2716
f05d147f
BS		 2717struct rpc_clnt *
2718nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2719 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2720{
2721 int status;
2722 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2723
2724 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2725 if (status < 0) {
2726 rpc_shutdown_client(client);
2727 return ERR_PTR(status);
2728 }
2729 return client;
2730}
2731
1da177e4
LT		 2732static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2733{
76b32999 2734 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2735 struct nfs4_accessargs args = {
2736 .fh = NFS_FH(inode),
a4980e78 2737 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2738 };
2739 struct nfs4_accessres res = {
2740 .server = server,
1da177e4 2741 };
1da177e4
LT		 2742 struct rpc_message msg = {
2743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2744 .rpc_argp = &args,
2745 .rpc_resp = &res,
2746 .rpc_cred = entry->cred,
2747 };
2748 int mode = entry->mask;
2749 int status;
2750
2751 /*
2752 * Determine which access bits we want to ask for...
2753 */
2754 if (mode & MAY_READ)
2755 args.access |= NFS4_ACCESS_READ;
2756 if (S_ISDIR(inode->i_mode)) {
2757 if (mode & MAY_WRITE)
2758 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2759 if (mode & MAY_EXEC)
2760 args.access |= NFS4_ACCESS_LOOKUP;
2761 } else {
2762 if (mode & MAY_WRITE)
2763 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2764 if (mode & MAY_EXEC)
2765 args.access |= NFS4_ACCESS_EXECUTE;
2766 }
c407d41a
TM		 2767
2768 res.fattr = nfs_alloc_fattr();
2769 if (res.fattr == NULL)
2770 return -ENOMEM;
2771
7c513058 2772 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2773 if (!status) {
2774 entry->mask = 0;
2775 if (res.access & NFS4_ACCESS_READ)
2776 entry->mask |= MAY_READ;
2777 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2778 entry->mask |= MAY_WRITE;
2779 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2780 entry->mask |= MAY_EXEC;
c407d41a 2781 nfs_refresh_inode(inode, res.fattr);
1da177e4 2782 }
c407d41a 2783 nfs_free_fattr(res.fattr);
1da177e4
LT		 2784 return status;
2785}
2786
2787static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2788{
2789 struct nfs4_exception exception = { };
2790 int err;
2791 do {
2792 err = nfs4_handle_exception(NFS_SERVER(inode),
2793 _nfs4_proc_access(inode, entry),
2794 &exception);
2795 } while (exception.retry);
2796 return err;
2797}
2798
2799/*
2800 * TODO: For the time being, we don't try to get any attributes
2801 * along with any of the zero-copy operations READ, READDIR,
2802 * READLINK, WRITE.
2803 *
2804 * In the case of the first three, we want to put the GETATTR
2805 * after the read-type operation -- this is because it is hard
2806 * to predict the length of a GETATTR response in v4, and thus
2807 * align the READ data correctly. This means that the GETATTR
2808 * may end up partially falling into the page cache, and we should
2809 * shift it into the 'tail' of the xdr_buf before processing.
2810 * To do this efficiently, we need to know the total length
2811 * of data received, which doesn't seem to be available outside
2812 * of the RPC layer.
2813 *
2814 * In the case of WRITE, we also want to put the GETATTR after
2815 * the operation -- in this case because we want to make sure
140150db 2816 * we get the post-operation mtime and size.
1da177e4
LT		 2817 *
2818 * Both of these changes to the XDR layer would in fact be quite
2819 * minor, but I decided to leave them for a subsequent patch.
2820 */
2821static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2822 unsigned int pgbase, unsigned int pglen)
2823{
2824 struct nfs4_readlink args = {
2825 .fh = NFS_FH(inode),
2826 .pgbase = pgbase,
2827 .pglen = pglen,
2828 .pages = &page,
2829 };
f50c7000 2830 struct nfs4_readlink_res res;
1da177e4
LT		 2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2833 .rpc_argp = &args,
f50c7000 2834 .rpc_resp = &res,
1da177e4
LT		 2835 };
2836
7c513058 2837 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2838}
2839
2840static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2841 unsigned int pgbase, unsigned int pglen)
2842{
2843 struct nfs4_exception exception = { };
2844 int err;
2845 do {
2846 err = nfs4_handle_exception(NFS_SERVER(inode),
2847 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2848 &exception);
2849 } while (exception.retry);
2850 return err;
2851}
2852
1da177e4 2853/*
8867fe58 2854 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2855 */
1da177e4
LT		 2856static int
2857nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2858 int flags)
1da177e4 2859{
8867fe58 2860 struct nfs_open_context *ctx;
1da177e4 2861 struct nfs4_state *state;
1da177e4
LT		 2862 int status = 0;
2863
8867fe58
MS		 2864 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2865 if (IS_ERR(ctx))
2866 return PTR_ERR(ctx);
2867
a8a5da99 2868 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2869 state = nfs4_do_open(dir, dentry, ctx->mode,
2870 flags, sattr, ctx->cred,
2871 &ctx->mdsthreshold);
d4d9cdcb 2872 d_drop(dentry);
1da177e4
LT		 2873 if (IS_ERR(state)) {
2874 status = PTR_ERR(state);
c0204fd2 2875 goto out;
1da177e4 2876 }
d4d9cdcb 2877 d_add(dentry, igrab(state->inode));
d75340cc 2878 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2879 ctx->state = state;
1da177e4 2880out:
8867fe58 2881 put_nfs_open_context(ctx);
1da177e4
LT		 2882 return status;
2883}
2884
2885static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2886{
16e42959 2887 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2888 struct nfs_removeargs args = {
1da177e4 2889 .fh = NFS_FH(dir),
26fe5750 2890 .name = *name,
16e42959 2891 };
4fdc17b2 2892 struct nfs_removeres res = {
16e42959 2893 .server = server,
1da177e4 2894 };
1da177e4 2895 struct rpc_message msg = {
4fdc17b2
TM		 2896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2897 .rpc_argp = &args,
2898 .rpc_resp = &res,
1da177e4 2899 };
778d2817 2900 int status;
1da177e4 2901
7c513058 2902 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2903 if (status == 0)
16e42959 2904 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2905 return status;
2906}
2907
2908static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2909{
2910 struct nfs4_exception exception = { };
2911 int err;
2912 do {
2913 err = nfs4_handle_exception(NFS_SERVER(dir),
2914 _nfs4_proc_remove(dir, name),
2915 &exception);
2916 } while (exception.retry);
2917 return err;
2918}
2919
e4eff1a6 2920static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2921{
e4eff1a6
TM		 2922 struct nfs_server *server = NFS_SERVER(dir);
2923 struct nfs_removeargs *args = msg->rpc_argp;
2924 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2925
e4eff1a6 2926 res->server = server;
1da177e4 2927 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2928 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2929}
2930
34e137cc
BS		 2931static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2932{
2933 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2934 &data->args.seq_args,
2935 &data->res.seq_res,
2936 task))
2937 return;
2938 rpc_call_start(task);
1da177e4
LT		 2939}
2940
e4eff1a6 2941static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2942{
e4eff1a6
TM		 2943 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2944
14516c3a
TM		 2945 if (!nfs4_sequence_done(task, &res->seq_res))
2946 return 0;
9e33bed5 2947 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2948 return 0;
2949 update_changeattr(dir, &res->cinfo);
e4eff1a6 2950 return 1;
1da177e4
LT		 2951}
2952
d3d4152a
JL		 2953static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2954{
2955 struct nfs_server *server = NFS_SERVER(dir);
2956 struct nfs_renameargs *arg = msg->rpc_argp;
2957 struct nfs_renameres *res = msg->rpc_resp;
2958
2959 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2960 res->server = server;
9d12b216 2961 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2962}
2963
c6bfa1a1
BS		 2964static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2965{
2966 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2967 &data->args.seq_args,
2968 &data->res.seq_res,
2969 task))
2970 return;
2971 rpc_call_start(task);
d3d4152a
JL		 2972}
2973
2974static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2975 struct inode *new_dir)
2976{
2977 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2978
2979 if (!nfs4_sequence_done(task, &res->seq_res))
2980 return 0;
2981 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2982 return 0;
2983
2984 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2985 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2986 return 1;
2987}
2988
1da177e4
LT		 2989static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2990 struct inode *new_dir, struct qstr *new_name)
2991{
6caf2c82 2992 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2993 struct nfs_renameargs arg = {
1da177e4
LT		 2994 .old_dir = NFS_FH(old_dir),
2995 .new_dir = NFS_FH(new_dir),
2996 .old_name = old_name,
2997 .new_name = new_name,
6caf2c82 2998 };
e8582a8b 2999 struct nfs_renameres res = {
6caf2c82 3000 .server = server,
1da177e4 3001 };
1da177e4
LT		 3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3004 .rpc_argp = &arg,
3005 .rpc_resp = &res,
3006 };
011fff72 3007 int status = -ENOMEM;
1da177e4 3008
7c513058 3009 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3010 if (!status) {
3011 update_changeattr(old_dir, &res.old_cinfo);
3012 update_changeattr(new_dir, &res.new_cinfo);
3013 }
3014 return status;
3015}
3016
3017static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3018 struct inode *new_dir, struct qstr *new_name)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022 do {
3023 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3024 _nfs4_proc_rename(old_dir, old_name,
3025 new_dir, new_name),
3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
3031static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3032{
91ba2eee 3033 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3034 struct nfs4_link_arg arg = {
3035 .fh = NFS_FH(inode),
3036 .dir_fh = NFS_FH(dir),
3037 .name = name,
91ba2eee
TM		 3038 .bitmask = server->attr_bitmask,
3039 };
91ba2eee
TM		 3040 struct nfs4_link_res res = {
3041 .server = server,
1da177e4 3042 };
1da177e4
LT		 3043 struct rpc_message msg = {
3044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3045 .rpc_argp = &arg,
91ba2eee 3046 .rpc_resp = &res,
1da177e4 3047 };
136f2627
TM		 3048 int status = -ENOMEM;
3049
3050 res.fattr = nfs_alloc_fattr();
778d2817 3051 if (res.fattr == NULL)
136f2627 3052 goto out;
1da177e4 3053
7c513058 3054 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3055 if (!status) {
3056 update_changeattr(dir, &res.cinfo);
73a3d07c 3057 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3058 }
136f2627 3059out:
136f2627 3060 nfs_free_fattr(res.fattr);
1da177e4
LT		 3061 return status;
3062}
3063
3064static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3065{
3066 struct nfs4_exception exception = { };
3067 int err;
3068 do {
3069 err = nfs4_handle_exception(NFS_SERVER(inode),
3070 _nfs4_proc_link(inode, dir, name),
3071 &exception);
3072 } while (exception.retry);
3073 return err;
3074}
3075
57dc9a57
TM		 3076struct nfs4_createdata {
3077 struct rpc_message msg;
3078 struct nfs4_create_arg arg;
3079 struct nfs4_create_res res;
3080 struct nfs_fh fh;
3081 struct nfs_fattr fattr;
57dc9a57
TM		 3082};
3083
3084static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3085 struct qstr *name, struct iattr *sattr, u32 ftype)
3086{
3087 struct nfs4_createdata *data;
3088
3089 data = kzalloc(sizeof(*data), GFP_KERNEL);
3090 if (data != NULL) {
3091 struct nfs_server *server = NFS_SERVER(dir);
3092
3093 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3094 data->msg.rpc_argp = &data->arg;
3095 data->msg.rpc_resp = &data->res;
3096 data->arg.dir_fh = NFS_FH(dir);
3097 data->arg.server = server;
3098 data->arg.name = name;
3099 data->arg.attrs = sattr;
3100 data->arg.ftype = ftype;
3101 data->arg.bitmask = server->attr_bitmask;
3102 data->res.server = server;
3103 data->res.fh = &data->fh;
3104 data->res.fattr = &data->fattr;
57dc9a57 3105 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3106 }
3107 return data;
3108}
3109
3110static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3111{
7c513058 3112 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3113 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3114 if (status == 0) {
3115 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3116 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3117 }
3118 return status;
3119}
3120
3121static void nfs4_free_createdata(struct nfs4_createdata *data)
3122{
3123 kfree(data);
3124}
3125
4f390c15 3126static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3127 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3128{
57dc9a57
TM		 3129 struct nfs4_createdata *data;
3130 int status = -ENAMETOOLONG;
1da177e4 3131
94a6d753 3132 if (len > NFS4_MAXPATHLEN)
57dc9a57 3133 goto out;
4f390c15 3134
57dc9a57
TM		 3135 status = -ENOMEM;
3136 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3137 if (data == NULL)
3138 goto out;
3139
3140 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3141 data->arg.u.symlink.pages = &page;
3142 data->arg.u.symlink.len = len;
1da177e4 3143
57dc9a57
TM		 3144 status = nfs4_do_create(dir, dentry, data);
3145
3146 nfs4_free_createdata(data);
3147out:
1da177e4
LT		 3148 return status;
3149}
3150
4f390c15 3151static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3152 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3153{
3154 struct nfs4_exception exception = { };
3155 int err;
3156 do {
3157 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3158 _nfs4_proc_symlink(dir, dentry, page,
3159 len, sattr),
1da177e4
LT		 3160 &exception);
3161 } while (exception.retry);
3162 return err;
3163}
3164
3165static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3166 struct iattr *sattr)
3167{
57dc9a57
TM		 3168 struct nfs4_createdata *data;
3169 int status = -ENOMEM;
1da177e4 3170
57dc9a57
TM		 3171 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3172 if (data == NULL)
3173 goto out;
3174
3175 status = nfs4_do_create(dir, dentry, data);
3176
3177 nfs4_free_createdata(data);
3178out:
1da177e4
LT		 3179 return status;
3180}
3181
3182static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3183 struct iattr *sattr)
3184{
3185 struct nfs4_exception exception = { };
3186 int err;
a8a5da99
AK		 3187
3188 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3189 do {
3190 err = nfs4_handle_exception(NFS_SERVER(dir),
3191 _nfs4_proc_mkdir(dir, dentry, sattr),
3192 &exception);
3193 } while (exception.retry);
3194 return err;
3195}
3196
3197static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3198 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3199{
3200 struct inode *dir = dentry->d_inode;
3201 struct nfs4_readdir_arg args = {
3202 .fh = NFS_FH(dir),
56e4ebf8 3203 .pages = pages,
1da177e4
LT		 3204 .pgbase = 0,
3205 .count = count,
96d25e53 3206 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3207 .plus = plus,
1da177e4
LT		 3208 };
3209 struct nfs4_readdir_res res;
3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3212 .rpc_argp = &args,
3213 .rpc_resp = &res,
3214 .rpc_cred = cred,
3215 };
3216 int status;
3217
3110ff80 3218 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3219 dentry->d_parent->d_name.name,
3220 dentry->d_name.name,
3221 (unsigned long long)cookie);
c3f52af3 3222 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3223 res.pgbase = args.pgbase;
7c513058 3224 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3225 if (status >= 0) {
c3f52af3 3226 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3227 status += args.pgbase;
3228 }
c4812998
TM		 3229
3230 nfs_invalidate_atime(dir);
3231
3110ff80 3232 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3233 return status;
3234}
3235
3236static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3237 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3238{
3239 struct nfs4_exception exception = { };
3240 int err;
3241 do {
3242 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3243 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3244 pages, count, plus),
1da177e4
LT		 3245 &exception);
3246 } while (exception.retry);
3247 return err;
3248}
3249
3250static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3251 struct iattr *sattr, dev_t rdev)
3252{
57dc9a57
TM		 3253 struct nfs4_createdata *data;
3254 int mode = sattr->ia_mode;
3255 int status = -ENOMEM;
1da177e4
LT		 3256
3257 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3258 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3259
3260 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3261 if (data == NULL)
3262 goto out;
3263
1da177e4 3264 if (S_ISFIFO(mode))
57dc9a57 3265 data->arg.ftype = NF4FIFO;
1da177e4 3266 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3267 data->arg.ftype = NF4BLK;
3268 data->arg.u.device.specdata1 = MAJOR(rdev);
3269 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3270 }
3271 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3272 data->arg.ftype = NF4CHR;
3273 data->arg.u.device.specdata1 = MAJOR(rdev);
3274 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3275 }
1da177e4 3276
57dc9a57
TM		 3277 status = nfs4_do_create(dir, dentry, data);
3278
3279 nfs4_free_createdata(data);
3280out:
1da177e4
LT		 3281 return status;
3282}
3283
3284static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3285 struct iattr *sattr, dev_t rdev)
3286{
3287 struct nfs4_exception exception = { };
3288 int err;
a8a5da99
AK		 3289
3290 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3291 do {
3292 err = nfs4_handle_exception(NFS_SERVER(dir),
3293 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3294 &exception);
3295 } while (exception.retry);
3296 return err;
3297}
3298
3299static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3300 struct nfs_fsstat *fsstat)
3301{
3302 struct nfs4_statfs_arg args = {
3303 .fh = fhandle,
3304 .bitmask = server->attr_bitmask,
3305 };
24ad148a
BH		 3306 struct nfs4_statfs_res res = {
3307 .fsstat = fsstat,
3308 };
1da177e4
LT		 3309 struct rpc_message msg = {
3310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3311 .rpc_argp = &args,
24ad148a 3312 .rpc_resp = &res,
1da177e4
LT		 3313 };
3314
0e574af1 3315 nfs_fattr_init(fsstat->fattr);
7c513058 3316 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3317}
3318
3319static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3320{
3321 struct nfs4_exception exception = { };
3322 int err;
3323 do {
3324 err = nfs4_handle_exception(server,
3325 _nfs4_proc_statfs(server, fhandle, fsstat),
3326 &exception);
3327 } while (exception.retry);
3328 return err;
3329}
3330
3331static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3332 struct nfs_fsinfo *fsinfo)
3333{
3334 struct nfs4_fsinfo_arg args = {
3335 .fh = fhandle,
3336 .bitmask = server->attr_bitmask,
3337 };
3dda5e43
BH		 3338 struct nfs4_fsinfo_res res = {
3339 .fsinfo = fsinfo,
3340 };
1da177e4
LT		 3341 struct rpc_message msg = {
3342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3343 .rpc_argp = &args,
3dda5e43 3344 .rpc_resp = &res,
1da177e4
LT		 3345 };
3346
7c513058 3347 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3348}
3349
3350static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3351{
3352 struct nfs4_exception exception = { };
3353 int err;
3354
3355 do {
3356 err = nfs4_handle_exception(server,
3357 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3358 &exception);
3359 } while (exception.retry);
3360 return err;
3361}
3362
3363static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3364{
e38eb650
BS		 3365 int error;
3366
0e574af1 3367 nfs_fattr_init(fsinfo->fattr);
e38eb650
BS		 3368 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3369 if (error == 0)
3370 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3371
3372 return error;
1da177e4
LT		 3373}
3374
3375static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3376 struct nfs_pathconf *pathconf)
3377{
3378 struct nfs4_pathconf_arg args = {
3379 .fh = fhandle,
3380 .bitmask = server->attr_bitmask,
3381 };
d45b2989
BH		 3382 struct nfs4_pathconf_res res = {
3383 .pathconf = pathconf,
3384 };
1da177e4
LT		 3385 struct rpc_message msg = {
3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3387 .rpc_argp = &args,
d45b2989 3388 .rpc_resp = &res,
1da177e4
LT		 3389 };
3390
3391 /* None of the pathconf attributes are mandatory to implement */
3392 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3393 memset(pathconf, 0, sizeof(*pathconf));
3394 return 0;
3395 }
3396
0e574af1 3397 nfs_fattr_init(pathconf->fattr);
7c513058 3398 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3399}
3400
3401static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3402 struct nfs_pathconf *pathconf)
3403{
3404 struct nfs4_exception exception = { };
3405 int err;
3406
3407 do {
3408 err = nfs4_handle_exception(server,
3409 _nfs4_proc_pathconf(server, fhandle, pathconf),
3410 &exception);
3411 } while (exception.retry);
3412 return err;
3413}
3414
d20581aa
BH		 3415void __nfs4_read_done_cb(struct nfs_read_data *data)
3416{
cd841605 3417 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3418}
3419
cbdabc7f 3420static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3421{
cd841605 3422 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3423
9e33bed5 3424 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3425 rpc_restart_call_prepare(task);
ec06c096 3426 return -EAGAIN;
1da177e4 3427 }
8850df99 3428
d20581aa 3429 __nfs4_read_done_cb(data);
1da177e4 3430 if (task->tk_status > 0)
ec06c096
TM		 3431 renew_lease(server, data->timestamp);
3432 return 0;
1da177e4
LT		 3433}
3434
cbdabc7f
AA		 3435static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3436{
3437
3438 dprintk("--> %s\n", __func__);
3439
3440 if (!nfs4_sequence_done(task, &data->res.seq_res))
3441 return -EAGAIN;
3442
d20581aa
BH		 3443 return data->read_done_cb ? data->read_done_cb(task, data) :
3444 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3445}
3446
bdc7f021 3447static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3448{
1da177e4 3449 data->timestamp = jiffies;
cbdabc7f 3450 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3451 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3452 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3453}
3454
ea7c3303
BS		 3455static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3456{
cd841605 3457 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3458 &data->args.seq_args,
3459 &data->res.seq_res,
3460 task))
3461 return;
3462 rpc_call_start(task);
1da177e4
LT		 3463}
3464
b029bc9b 3465static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3466{
cd841605 3467 struct inode *inode = data->header->inode;
1da177e4 3468
9e33bed5 3469 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3470 rpc_restart_call_prepare(task);
788e7a89 3471 return -EAGAIN;
1da177e4 3472 }
4f9838c7 3473 if (task->tk_status >= 0) {
1da177e4 3474 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3475 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3476 }
788e7a89 3477 return 0;
1da177e4
LT		 3478}
3479
b029bc9b
FI		 3480static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3481{
3482 if (!nfs4_sequence_done(task, &data->res.seq_res))
3483 return -EAGAIN;
d20581aa
BH		 3484 return data->write_done_cb ? data->write_done_cb(task, data) :
3485 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3486}
3487
5a37f851
TM		 3488static
3489bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3490{
5a37f851
TM		 3491 const struct nfs_pgio_header *hdr = data->header;
3492
3493 /* Don't request attributes for pNFS or O_DIRECT writes */
3494 if (data->ds_clp != NULL || hdr->dreq != NULL)
3495 return false;
3496 /* Otherwise, request attributes if and only if we don't hold
3497 * a delegation
3498 */
011e2a7f 3499 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3500}
a69aef14 3501
bdc7f021 3502static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3503{
cd841605 3504 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3505
5a37f851 3506 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3507 data->args.bitmask = NULL;
3508 data->res.fattr = NULL;
3509 } else
3510 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3511
b029bc9b
FI		 3512 if (!data->write_done_cb)
3513 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3514 data->res.server = server;
1da177e4
LT		 3515 data->timestamp = jiffies;
3516
bdc7f021 3517 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3518 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3519}
3520
c6cb80d0
BS		 3521static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3522{
cd841605 3523 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3524 &data->args.seq_args,
3525 &data->res.seq_res,
3526 task))
3527 return;
3528 rpc_call_start(task);
1da177e4
LT		 3529}
3530
0b7c0153 3531static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3532{
3533 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3534 &data->args.seq_args,
3535 &data->res.seq_res,
3536 task))
3537 return;
3538 rpc_call_start(task);
1da177e4
LT		 3539}
3540
0b7c0153 3541static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3542{
1da177e4 3543 struct inode *inode = data->inode;
14516c3a 3544
9e33bed5 3545 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3546 rpc_restart_call_prepare(task);
788e7a89 3547 return -EAGAIN;
1da177e4 3548 }
788e7a89 3549 return 0;
1da177e4
LT		 3550}
3551
0b7c0153 3552static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3553{
3554 if (!nfs4_sequence_done(task, &data->res.seq_res))
3555 return -EAGAIN;
0b7c0153 3556 return data->commit_done_cb(task, data);
5f452431
FI		 3557}
3558
0b7c0153 3559static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3560{
788e7a89 3561 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3562
0b7c0153
FI		 3563 if (data->commit_done_cb == NULL)
3564 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3565 data->res.server = server;
bdc7f021 3566 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3567 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3568}
3569
9bc4e3ca
CL		 3570struct nfs4_renewdata {
3571 struct nfs_client *client;
3572 unsigned long timestamp;
3573};
3574
1da177e4
LT		 3575/*
3576 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3577 * standalone procedure for queueing an asynchronous RENEW.
3578 */
9bc4e3ca 3579static void nfs4_renew_release(void *calldata)
dc96aef9 3580{
9bc4e3ca
CL		 3581 struct nfs4_renewdata *data = calldata;
3582 struct nfs_client *clp = data->client;
dc96aef9 3583
0851de06
AB		 3584 if (atomic_read(&clp->cl_count) > 1)
3585 nfs4_schedule_state_renewal(clp);
3586 nfs_put_client(clp);
9bc4e3ca 3587 kfree(data);
dc96aef9
AB		 3588}
3589
9bc4e3ca 3590static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3591{
9bc4e3ca
CL		 3592 struct nfs4_renewdata *data = calldata;
3593 struct nfs_client *clp = data->client;
3594 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3595
3596 if (task->tk_status < 0) {
95baa25c 3597 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3598 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3599 return;
3600 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3601 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3602 return;
3603 }
3604 nfs4_schedule_path_down_recovery(clp);
1da177e4 3605 }
452e9352 3606 do_renew_lease(clp, timestamp);
1da177e4
LT		 3607}
3608
963d8fe5
TM		 3609static const struct rpc_call_ops nfs4_renew_ops = {
3610 .rpc_call_done = nfs4_renew_done,
dc96aef9 3611 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3612};
3613
2f60ea6b 3614static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3615{
3616 struct rpc_message msg = {
3617 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3618 .rpc_argp = clp,
b4454fe1 3619 .rpc_cred = cred,
1da177e4 3620 };
9bc4e3ca 3621 struct nfs4_renewdata *data;
1da177e4 3622
2f60ea6b
TM		 3623 if (renew_flags == 0)
3624 return 0;
0851de06
AB		 3625 if (!atomic_inc_not_zero(&clp->cl_count))
3626 return -EIO;
b569ad34 3627 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3628 if (data == NULL)
3629 return -ENOMEM;
3630 data->client = clp;
3631 data->timestamp = jiffies;
1da177e4 3632 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3633 &nfs4_renew_ops, data);
1da177e4
LT		 3634}
3635
8534d4ec 3636static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3637{
3638 struct rpc_message msg = {
3639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3640 .rpc_argp = clp,
b4454fe1 3641 .rpc_cred = cred,
1da177e4
LT		 3642 };
3643 unsigned long now = jiffies;
3644 int status;
3645
3646 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3647 if (status < 0)
3648 return status;
452e9352 3649 do_renew_lease(clp, now);
1da177e4
LT		 3650 return 0;
3651}
3652
aa1870af
BF		 3653static inline int nfs4_server_supports_acls(struct nfs_server *server)
3654{
3655 return (server->caps & NFS_CAP_ACLS)
3656 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3657 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3658}
3659
21f498c2
TM		 3660/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3661 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3662 * the stack.
3663 */
21f498c2 3664#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3665
e9e3d724
NH		 3666static int buf_to_pages_noslab(const void *buf, size_t buflen,
3667 struct page **pages, unsigned int *pgbase)
3668{
3669 struct page *newpage, **spages;
3670 int rc = 0;
3671 size_t len;
3672 spages = pages;
3673
3674 do {
21f498c2 3675 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3676 newpage = alloc_page(GFP_KERNEL);
3677
3678 if (newpage == NULL)
3679 goto unwind;
3680 memcpy(page_address(newpage), buf, len);
3681 buf += len;
3682 buflen -= len;
3683 *pages++ = newpage;
3684 rc++;
3685 } while (buflen != 0);
3686
3687 return rc;
3688
3689unwind:
3690 for(; rc > 0; rc--)
3691 __free_page(spages[rc-1]);
3692 return -ENOMEM;
3693}
3694
e50a1c2e
BF		 3695struct nfs4_cached_acl {
3696 int cached;
3697 size_t len;
3e9d4154 3698 char data[0];
e50a1c2e
BF		 3699};
3700
3701static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3702{
3703 struct nfs_inode *nfsi = NFS_I(inode);
3704
3705 spin_lock(&inode->i_lock);
3706 kfree(nfsi->nfs4_acl);
3707 nfsi->nfs4_acl = acl;
3708 spin_unlock(&inode->i_lock);
3709}
3710
3711static void nfs4_zap_acl_attr(struct inode *inode)
3712{
3713 nfs4_set_cached_acl(inode, NULL);
3714}
3715
3716static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3717{
3718 struct nfs_inode *nfsi = NFS_I(inode);
3719 struct nfs4_cached_acl *acl;
3720 int ret = -ENOENT;
3721
3722 spin_lock(&inode->i_lock);
3723 acl = nfsi->nfs4_acl;
3724 if (acl == NULL)
3725 goto out;
3726 if (buf == NULL) /* user is just asking for length */
3727 goto out_len;
3728 if (acl->cached == 0)
3729 goto out;
3730 ret = -ERANGE; /* see getxattr(2) man page */
3731 if (acl->len > buflen)
3732 goto out;
3733 memcpy(buf, acl->data, acl->len);
3734out_len:
3735 ret = acl->len;
3736out:
3737 spin_unlock(&inode->i_lock);
3738 return ret;
3739}
3740
5794d21e 3741static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3742{
3743 struct nfs4_cached_acl *acl;
b291f1b1 3744 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3745
1f1ea6c2 3746 if (buflen <= PAGE_SIZE) {
b291f1b1 3747 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3748 if (acl == NULL)
3749 goto out;
3750 acl->cached = 1;
5794d21e 3751 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3752 } else {
3753 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3754 if (acl == NULL)
3755 goto out;
3756 acl->cached = 0;
3757 }
3758 acl->len = acl_len;
3759out:
3760 nfs4_set_cached_acl(inode, acl);
3761}
3762
bf118a34
AA		 3763/*
3764 * The getxattr API returns the required buffer length when called with a
3765 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3766 * the required buf. On a NULL buf, we send a page of data to the server
3767 * guessing that the ACL request can be serviced by a page. If so, we cache
3768 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3769 * the cache. If not so, we throw away the page, and cache the required
3770 * length. The next getxattr call will then produce another round trip to
3771 * the server, this time with the input buf of the required size.
3772 */
16b4289c 3773static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3774{
bf118a34 3775 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3776 struct nfs_getaclargs args = {
3777 .fh = NFS_FH(inode),
3778 .acl_pages = pages,
3779 .acl_len = buflen,
3780 };
663c79b3
BH		 3781 struct nfs_getaclres res = {
3782 .acl_len = buflen,
3783 };
aa1870af
BF		 3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3786 .rpc_argp = &args,
663c79b3 3787 .rpc_resp = &res,
aa1870af 3788 };
21f498c2
TM		 3789 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3790 int ret = -ENOMEM, i;
aa1870af 3791
bf118a34
AA		 3792 /* As long as we're doing a round trip to the server anyway,
3793 * let's be prepared for a page of acl data. */
3794 if (npages == 0)
3795 npages = 1;
21f498c2
TM		 3796 if (npages > ARRAY_SIZE(pages))
3797 return -ERANGE;
5a006899 3798
bf118a34
AA		 3799 for (i = 0; i < npages; i++) {
3800 pages[i] = alloc_page(GFP_KERNEL);
3801 if (!pages[i])
3802 goto out_free;
e50a1c2e 3803 }
5a006899
SP		 3804
3805 /* for decoding across pages */
3806 res.acl_scratch = alloc_page(GFP_KERNEL);
3807 if (!res.acl_scratch)
3808 goto out_free;
3809
bf118a34
AA		 3810 args.acl_len = npages * PAGE_SIZE;
3811 args.acl_pgbase = 0;
5a006899 3812
de040bec 3813 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3814 __func__, buf, buflen, npages, args.acl_len);
3815 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3816 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3817 if (ret)
3818 goto out_free;
bf118a34 3819
1f1ea6c2
TM		 3820 /* Handle the case where the passed-in buffer is too short */
3821 if (res.acl_flags & NFS4_ACL_TRUNC) {
3822 /* Did the user only issue a request for the acl length? */
3823 if (buf == NULL)
3824 goto out_ok;
e50a1c2e 3825 ret = -ERANGE;
1f1ea6c2 3826 goto out_free;
e50a1c2e 3827 }
1f1ea6c2
TM		 3828 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3829 if (buf)
3830 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3831out_ok:
3832 ret = res.acl_len;
e50a1c2e 3833out_free:
bf118a34
AA		 3834 for (i = 0; i < npages; i++)
3835 if (pages[i])
3836 __free_page(pages[i]);
331818f1
TM		 3837 if (res.acl_scratch)
3838 __free_page(res.acl_scratch);
aa1870af
BF		 3839 return ret;
3840}
3841
16b4289c
TM		 3842static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3843{
3844 struct nfs4_exception exception = { };
3845 ssize_t ret;
3846 do {
3847 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3848 if (ret >= 0)
3849 break;
3850 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3851 } while (exception.retry);
3852 return ret;
3853}
3854
e50a1c2e
BF		 3855static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3856{
3857 struct nfs_server *server = NFS_SERVER(inode);
3858 int ret;
3859
3860 if (!nfs4_server_supports_acls(server))
3861 return -EOPNOTSUPP;
3862 ret = nfs_revalidate_inode(server, inode);
3863 if (ret < 0)
3864 return ret;
08a22b39
AK		 3865 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3866 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3867 ret = nfs4_read_cached_acl(inode, buf, buflen);
3868 if (ret != -ENOENT)
bf118a34
AA		 3869 /* -ENOENT is returned if there is no ACL or if there is an ACL
3870 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3871 return ret;
3872 return nfs4_get_acl_uncached(inode, buf, buflen);
3873}
3874
16b4289c 3875static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3876{
3877 struct nfs_server *server = NFS_SERVER(inode);
3878 struct page *pages[NFS4ACL_MAXPAGES];
3879 struct nfs_setaclargs arg = {
3880 .fh = NFS_FH(inode),
3881 .acl_pages = pages,
3882 .acl_len = buflen,
3883 };
73c403a9 3884 struct nfs_setaclres res;
4b580ee3
BF		 3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3887 .rpc_argp = &arg,
73c403a9 3888 .rpc_resp = &res,
4b580ee3 3889 };
21f498c2 3890 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3891 int ret, i;
4b580ee3
BF		 3892
3893 if (!nfs4_server_supports_acls(server))
3894 return -EOPNOTSUPP;
21f498c2
TM		 3895 if (npages > ARRAY_SIZE(pages))
3896 return -ERANGE;
e9e3d724
NH		 3897 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3898 if (i < 0)
3899 return i;
57ec14c5 3900 nfs4_inode_return_delegation(inode);
7c513058 3901 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3902
3903 /*
3904 * Free each page after tx, so the only ref left is
3905 * held by the network stack
3906 */
3907 for (; i > 0; i--)
3908 put_page(pages[i-1]);
3909
08a22b39
AK		 3910 /*
3911 * Acl update can result in inode attribute update.
3912 * so mark the attribute cache invalid.
3913 */
3914 spin_lock(&inode->i_lock);
3915 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3916 spin_unlock(&inode->i_lock);
f41f7418
TM		 3917 nfs_access_zap_cache(inode);
3918 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3919 return ret;
3920}
3921
16b4289c
TM		 3922static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3923{
3924 struct nfs4_exception exception = { };
3925 int err;
3926 do {
3927 err = nfs4_handle_exception(NFS_SERVER(inode),
3928 __nfs4_proc_set_acl(inode, buf, buflen),
3929 &exception);
3930 } while (exception.retry);
3931 return err;
3932}
3933
1da177e4 3934static int
aa5190d0 3935nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3936{
aa5190d0
TM		 3937 struct nfs_client *clp = server->nfs_client;
3938
3939 if (task->tk_status >= 0)
1da177e4
LT		 3940 return 0;
3941 switch(task->tk_status) {
a1d0b5ee 3942 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3943 case -NFS4ERR_ADMIN_REVOKED:
3944 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3945 if (state == NULL)
3946 break;
3947 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3948 case -NFS4ERR_OPENMODE:
3949 if (state == NULL)
3950 break;
0400a6b0
TM		 3951 nfs4_schedule_stateid_recovery(server, state);
3952 goto wait_on_recovery;
0ced63d1
TM		 3953 case -NFS4ERR_EXPIRED:
3954 if (state != NULL)
3955 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3956 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3957 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3958 nfs4_schedule_lease_recovery(clp);
3959 goto wait_on_recovery;
4745e315
AA		 3960#if defined(CONFIG_NFS_V4_1)
3961 case -NFS4ERR_BADSESSION:
3962 case -NFS4ERR_BADSLOT:
3963 case -NFS4ERR_BAD_HIGH_SLOT:
3964 case -NFS4ERR_DEADSESSION:
3965 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3966 case -NFS4ERR_SEQ_FALSE_RETRY:
3967 case -NFS4ERR_SEQ_MISORDERED:
3968 dprintk("%s ERROR %d, Reset session\n", __func__,
3969 task->tk_status);
9f594791 3970 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3971 task->tk_status = 0;
3972 return -EAGAIN;
3973#endif /* CONFIG_NFS_V4_1 */
1da177e4 3974 case -NFS4ERR_DELAY:
aa5190d0 3975 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3976 case -NFS4ERR_GRACE:
2c643488 3977 case -EKEYEXPIRED:
1da177e4
LT		 3978 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3979 task->tk_status = 0;
3980 return -EAGAIN;
a8a4ae3a 3981 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3982 case -NFS4ERR_OLD_STATEID:
3983 task->tk_status = 0;
3984 return -EAGAIN;
3985 }
3986 task->tk_status = nfs4_map_errors(task->tk_status);
3987 return 0;
0400a6b0 3988wait_on_recovery:
a2c0b9e2 3989 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3990 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3991 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3992 task->tk_status = 0;
3993 return -EAGAIN;
1da177e4
LT		 3994}
3995
f092075d
CL		 3996static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3997 nfs4_verifier *bootverf)
cd93710e
CL		 3998{
3999 __be32 verf[2];
4000
2c820d9a
CL		 4001 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4002 /* An impossible timestamp guarantees this value
4003 * will never match a generated boot time. */
4004 verf[0] = 0;
4005 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4006 } else {
f092075d
CL		 4007 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4008 verf[0] = (__be32)nn->boot_time.tv_sec;
4009 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4010 }
cd93710e
CL		 4011 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4012}
4013
6bbb4ae8
CL		 4014/**
4015 * nfs4_proc_setclientid - Negotiate client ID
4016 * @clp: state data structure
4017 * @program: RPC program for NFSv4 callback service
4018 * @port: IP port number for NFS4 callback service
4019 * @cred: RPC credential to use for this call
4020 * @res: where to place the result
4021 *
4022 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4023 */
bb8b27e5
TM		 4024int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4025 unsigned short port, struct rpc_cred *cred,
4026 struct nfs4_setclientid_res *res)
1da177e4
LT		 4027{
4028 nfs4_verifier sc_verifier;
4029 struct nfs4_setclientid setclientid = {
4030 .sc_verifier = &sc_verifier,
4031 .sc_prog = program,
f4eecd5d 4032 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4033 };
4034 struct rpc_message msg = {
4035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4036 .rpc_argp = &setclientid,
bb8b27e5 4037 .rpc_resp = res,
286d7d6a 4038 .rpc_cred = cred,
1da177e4 4039 };
6bbb4ae8 4040 int status;
1da177e4 4041
de734831 4042 /* nfs_client_id4 */
f092075d 4043 nfs4_init_boot_verifier(clp, &sc_verifier);
de734831
CL		 4044 rcu_read_lock();
4045 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4046 sizeof(setclientid.sc_name), "%s/%s %s",
4047 clp->cl_ipaddr,
4048 rpc_peeraddr2str(clp->cl_rpcclient,
4049 RPC_DISPLAY_ADDR),
4050 rpc_peeraddr2str(clp->cl_rpcclient,
4051 RPC_DISPLAY_PROTO));
4052 /* cb_client4 */
4053 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4054 sizeof(setclientid.sc_netid),
4055 rpc_peeraddr2str(clp->cl_rpcclient,
4056 RPC_DISPLAY_NETID));
de734831
CL		 4057 rcu_read_unlock();
4058 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4059 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4060 clp->cl_ipaddr, port >> 8, port & 255);
4061
6bbb4ae8
CL		 4062 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4063 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4064 setclientid.sc_name_len, setclientid.sc_name);
4065 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4066 dprintk("NFS reply setclientid: %d\n", status);
4067 return status;
1da177e4
LT		 4068}
4069
6bbb4ae8
CL		 4070/**
4071 * nfs4_proc_setclientid_confirm - Confirm client ID
4072 * @clp: state data structure
4073 * @res: result of a previous SETCLIENTID
4074 * @cred: RPC credential to use for this call
4075 *
4076 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4077 */
fd954ae1 4078int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4079 struct nfs4_setclientid_res *arg,
4080 struct rpc_cred *cred)
1da177e4
LT		 4081{
4082 struct nfs_fsinfo fsinfo;
4083 struct rpc_message msg = {
4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4085 .rpc_argp = arg,
1da177e4 4086 .rpc_resp = &fsinfo,
286d7d6a 4087 .rpc_cred = cred,
1da177e4
LT		 4088 };
4089 unsigned long now;
4090 int status;
4091
6bbb4ae8
CL		 4092 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4093 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4094 clp->cl_clientid);
1da177e4 4095 now = jiffies;
1bd714f2 4096 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4097 if (status == 0) {
4098 spin_lock(&clp->cl_lock);
4099 clp->cl_lease_time = fsinfo.lease_time * HZ;
4100 clp->cl_last_renewal = now;
4101 spin_unlock(&clp->cl_lock);
4102 }
6bbb4ae8 4103 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4104 return status;
4105}
4106
fe650407
TM		 4107struct nfs4_delegreturndata {
4108 struct nfs4_delegreturnargs args;
fa178f29 4109 struct nfs4_delegreturnres res;
fe650407
TM		 4110 struct nfs_fh fh;
4111 nfs4_stateid stateid;
26e976a8 4112 unsigned long timestamp;
fa178f29 4113 struct nfs_fattr fattr;
fe650407
TM		 4114 int rpc_status;
4115};
4116
fe650407
TM		 4117static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4118{
4119 struct nfs4_delegreturndata *data = calldata;
938e1010 4120
14516c3a
TM		 4121 if (!nfs4_sequence_done(task, &data->res.seq_res))
4122 return;
938e1010 4123
79708861
RL		 4124 switch (task->tk_status) {
4125 case -NFS4ERR_STALE_STATEID:
4126 case -NFS4ERR_EXPIRED:
4127 case 0:
fa178f29 4128 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4129 break;
4130 default:
4131 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4132 -EAGAIN) {
d00c5d43 4133 rpc_restart_call_prepare(task);
79708861
RL		 4134 return;
4135 }
4136 }
4137 data->rpc_status = task->tk_status;
fe650407
TM		 4138}
4139
4140static void nfs4_delegreturn_release(void *calldata)
4141{
fe650407
TM		 4142 kfree(calldata);
4143}
4144
938e1010
AA		 4145#if defined(CONFIG_NFS_V4_1)
4146static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4147{
4148 struct nfs4_delegreturndata *d_data;
4149
4150 d_data = (struct nfs4_delegreturndata *)data;
4151
035168ab 4152 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4153 &d_data->args.seq_args,
9d12b216 4154 &d_data->res.seq_res, task))
938e1010
AA		 4155 return;
4156 rpc_call_start(task);
4157}
4158#endif /* CONFIG_NFS_V4_1 */
4159
c8d149f3 4160static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4161#if defined(CONFIG_NFS_V4_1)
4162 .rpc_call_prepare = nfs4_delegreturn_prepare,
4163#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4164 .rpc_call_done = nfs4_delegreturn_done,
4165 .rpc_release = nfs4_delegreturn_release,
4166};
4167
e6f81075 4168static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4169{
4170 struct nfs4_delegreturndata *data;
fa178f29 4171 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4172 struct rpc_task *task;
5138fde0
TM		 4173 struct rpc_message msg = {
4174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4175 .rpc_cred = cred,
4176 };
c970aa85
TM		 4177 struct rpc_task_setup task_setup_data = {
4178 .rpc_client = server->client,
5138fde0 4179 .rpc_message = &msg,
c970aa85
TM		 4180 .callback_ops = &nfs4_delegreturn_ops,
4181 .flags = RPC_TASK_ASYNC,
4182 };
e6f81075 4183 int status = 0;
fe650407 4184
8535b2be 4185 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4186 if (data == NULL)
4187 return -ENOMEM;
9d12b216 4188 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4189 data->args.fhandle = &data->fh;
4190 data->args.stateid = &data->stateid;
9e907fec 4191 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4192 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4193 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4194 data->res.fattr = &data->fattr;
4195 data->res.server = server;
5138fde0 4196 nfs_fattr_init(data->res.fattr);
26e976a8 4197 data->timestamp = jiffies;
fe650407
TM		 4198 data->rpc_status = 0;
4199
c970aa85 4200 task_setup_data.callback_data = data;
1174dd1f
TM		 4201 msg.rpc_argp = &data->args;
4202 msg.rpc_resp = &data->res;
c970aa85 4203 task = rpc_run_task(&task_setup_data);
7a1218a2 4204 if (IS_ERR(task))
fe650407 4205 return PTR_ERR(task);
e6f81075
TM		 4206 if (!issync)
4207 goto out;
fe650407 4208 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4209 if (status != 0)
4210 goto out;
4211 status = data->rpc_status;
e144cbcc
TM		 4212 if (status == 0)
4213 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4214 else
4215 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4216out:
e6b3c4db 4217 rpc_put_task(task);
fe650407 4218 return status;
1da177e4
LT		 4219}
4220
e6f81075 4221int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4222{
4223 struct nfs_server *server = NFS_SERVER(inode);
4224 struct nfs4_exception exception = { };
4225 int err;
4226 do {
e6f81075 4227 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4228 switch (err) {
4229 case -NFS4ERR_STALE_STATEID:
4230 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4231 case 0:
4232 return 0;
4233 }
4234 err = nfs4_handle_exception(server, err, &exception);
4235 } while (exception.retry);
4236 return err;
4237}
4238
4239#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4240#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4241
4242/*
4243 * sleep, with exponential backoff, and retry the LOCK operation.
4244 */
4245static unsigned long
4246nfs4_set_lock_task_retry(unsigned long timeout)
4247{
d310310c 4248 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4249 timeout <<= 1;
4250 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4251 return NFS4_LOCK_MAXTIMEOUT;
4252 return timeout;
4253}
4254
1da177e4
LT		 4255static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4256{
4257 struct inode *inode = state->inode;
4258 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4259 struct nfs_client *clp = server->nfs_client;
911d1aaf 4260 struct nfs_lockt_args arg = {
1da177e4 4261 .fh = NFS_FH(inode),
911d1aaf 4262 .fl = request,
1da177e4 4263 };
911d1aaf
TM		 4264 struct nfs_lockt_res res = {
4265 .denied = request,
1da177e4
LT		 4266 };
4267 struct rpc_message msg = {
4268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4269 .rpc_argp = &arg,
4270 .rpc_resp = &res,
4271 .rpc_cred = state->owner->so_cred,
4272 };
1da177e4
LT		 4273 struct nfs4_lock_state *lsp;
4274 int status;
4275
911d1aaf 4276 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4277 status = nfs4_set_lock_state(state, request);
4278 if (status != 0)
4279 goto out;
4280 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4281 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4282 arg.lock_owner.s_dev = server->s_dev;
7c513058 4283 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4284 switch (status) {
4285 case 0:
4286 request->fl_type = F_UNLCK;
4287 break;
4288 case -NFS4ERR_DENIED:
4289 status = 0;
1da177e4 4290 }
70cc6487 4291 request->fl_ops->fl_release_private(request);
8d0a8a9d 4292out:
1da177e4
LT		 4293 return status;
4294}
4295
4296static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4297{
4298 struct nfs4_exception exception = { };
4299 int err;
4300
4301 do {
4302 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4303 _nfs4_proc_getlk(state, cmd, request),
4304 &exception);
4305 } while (exception.retry);
4306 return err;
4307}
4308
4309static int do_vfs_lock(struct file *file, struct file_lock *fl)
4310{
4311 int res = 0;
4312 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4313 case FL_POSIX:
4314 res = posix_lock_file_wait(file, fl);
4315 break;
4316 case FL_FLOCK:
4317 res = flock_lock_file_wait(file, fl);
4318 break;
4319 default:
4320 BUG();
4321 }
1da177e4
LT		 4322 return res;
4323}
4324
faf5f49c 4325struct nfs4_unlockdata {
911d1aaf
TM		 4326 struct nfs_locku_args arg;
4327 struct nfs_locku_res res;
faf5f49c
TM		 4328 struct nfs4_lock_state *lsp;
4329 struct nfs_open_context *ctx;
911d1aaf
TM		 4330 struct file_lock fl;
4331 const struct nfs_server *server;
26e976a8 4332 unsigned long timestamp;
faf5f49c
TM		 4333};
4334
911d1aaf
TM		 4335static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4336 struct nfs_open_context *ctx,
4337 struct nfs4_lock_state *lsp,
4338 struct nfs_seqid *seqid)
4339{
4340 struct nfs4_unlockdata *p;
4341 struct inode *inode = lsp->ls_state->inode;
4342
8535b2be 4343 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4344 if (p == NULL)
4345 return NULL;
4346 p->arg.fh = NFS_FH(inode);
4347 p->arg.fl = &p->fl;
4348 p->arg.seqid = seqid;
c1d51931 4349 p->res.seqid = seqid;
911d1aaf
TM		 4350 p->arg.stateid = &lsp->ls_stateid;
4351 p->lsp = lsp;
4352 atomic_inc(&lsp->ls_count);
4353 /* Ensure we don't close file until we're done freeing locks! */
4354 p->ctx = get_nfs_open_context(ctx);
4355 memcpy(&p->fl, fl, sizeof(p->fl));
4356 p->server = NFS_SERVER(inode);
4357 return p;
4358}
4359
06f814a3 4360static void nfs4_locku_release_calldata(void *data)
faf5f49c 4361{
963d8fe5 4362 struct nfs4_unlockdata *calldata = data;
911d1aaf 4363 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4364 nfs4_put_lock_state(calldata->lsp);
4365 put_nfs_open_context(calldata->ctx);
4366 kfree(calldata);
faf5f49c
TM		 4367}
4368
963d8fe5 4369static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4370{
963d8fe5 4371 struct nfs4_unlockdata *calldata = data;
faf5f49c 4372
14516c3a
TM		 4373 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4374 return;
faf5f49c
TM		 4375 switch (task->tk_status) {
4376 case 0:
f597c537
TM		 4377 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4378 &calldata->res.stateid);
26e976a8 4379 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4380 break;
9e33bed5
TM		 4381 case -NFS4ERR_BAD_STATEID:
4382 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4383 case -NFS4ERR_STALE_STATEID:
4384 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4385 break;
4386 default:
9e33bed5 4387 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4388 rpc_restart_call_prepare(task);
faf5f49c 4389 }
faf5f49c
TM		 4390}
4391
4ce70ada 4392static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4393{
4ce70ada 4394 struct nfs4_unlockdata *calldata = data;
faf5f49c 4395
911d1aaf 4396 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4397 return;
795a88c9 4398 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4399 /* Note: exit _without_ running nfs4_locku_done */
4400 task->tk_action = NULL;
faf5f49c
TM		 4401 return;
4402 }
26e976a8 4403 calldata->timestamp = jiffies;
035168ab 4404 if (nfs4_setup_sequence(calldata->server,
a893693c 4405 &calldata->arg.seq_args,
9d12b216 4406 &calldata->res.seq_res, task))
a893693c 4407 return;
5138fde0 4408 rpc_call_start(task);
faf5f49c
TM		 4409}
4410
963d8fe5 4411static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4412 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4413 .rpc_call_done = nfs4_locku_done,
06f814a3 4414 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4415};
4416
a5d16a4d
TM		 4417static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4418 struct nfs_open_context *ctx,
4419 struct nfs4_lock_state *lsp,
4420 struct nfs_seqid *seqid)
4421{
4422 struct nfs4_unlockdata *data;
5138fde0
TM		 4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4425 .rpc_cred = ctx->cred,
4426 };
c970aa85
TM		 4427 struct rpc_task_setup task_setup_data = {
4428 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4429 .rpc_message = &msg,
c970aa85 4430 .callback_ops = &nfs4_locku_ops,
101070ca 4431 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4432 .flags = RPC_TASK_ASYNC,
4433 };
a5d16a4d 4434
137d6aca
FF		 4435 /* Ensure this is an unlock - when canceling a lock, the
4436 * canceled lock is passed in, and it won't be an unlock.
4437 */
4438 fl->fl_type = F_UNLCK;
4439
a5d16a4d
TM		 4440 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4441 if (data == NULL) {
4442 nfs_free_seqid(seqid);
4443 return ERR_PTR(-ENOMEM);
4444 }
4445
9d12b216 4446 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4447 msg.rpc_argp = &data->arg;
4448 msg.rpc_resp = &data->res;
c970aa85
TM		 4449 task_setup_data.callback_data = data;
4450 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4451}
4452
faf5f49c
TM		 4453static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4454{
19e03c57 4455 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4456 struct nfs_seqid *seqid;
1da177e4 4457 struct nfs4_lock_state *lsp;
06f814a3
TM		 4458 struct rpc_task *task;
4459 int status = 0;
536ff0f8 4460 unsigned char fl_flags = request->fl_flags;
faf5f49c 4461
8d0a8a9d 4462 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4463 /* Unlock _before_ we do the RPC call */
4464 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4465 down_read(&nfsi->rwsem);
4466 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4467 up_read(&nfsi->rwsem);
9b073574 4468 goto out;
19e03c57
TM		 4469 }
4470 up_read(&nfsi->rwsem);
8d0a8a9d 4471 if (status != 0)
9b073574
TM		 4472 goto out;
4473 /* Is this a delegated lock? */
4474 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4475 goto out;
8d0a8a9d 4476 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4477 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4478 status = -ENOMEM;
911d1aaf 4479 if (seqid == NULL)
9b073574 4480 goto out;
cd3758e3 4481 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4482 status = PTR_ERR(task);
4483 if (IS_ERR(task))
9b073574 4484 goto out;
a5d16a4d 4485 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4486 rpc_put_task(task);
9b073574 4487out:
536ff0f8 4488 request->fl_flags = fl_flags;
1da177e4
LT		 4489 return status;
4490}
4491
a5d16a4d
TM		 4492struct nfs4_lockdata {
4493 struct nfs_lock_args arg;
4494 struct nfs_lock_res res;
4495 struct nfs4_lock_state *lsp;
4496 struct nfs_open_context *ctx;
4497 struct file_lock fl;
26e976a8 4498 unsigned long timestamp;
a5d16a4d
TM		 4499 int rpc_status;
4500 int cancelled;
66179efe 4501 struct nfs_server *server;
a5d16a4d
TM		 4502};
4503
4504static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4505 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4506 gfp_t gfp_mask)
1da177e4 4507{
a5d16a4d
TM		 4508 struct nfs4_lockdata *p;
4509 struct inode *inode = lsp->ls_state->inode;
1da177e4 4510 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4511
8535b2be 4512 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4513 if (p == NULL)
4514 return NULL;
4515
4516 p->arg.fh = NFS_FH(inode);
4517 p->arg.fl = &p->fl;
8535b2be 4518 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4519 if (p->arg.open_seqid == NULL)
4520 goto out_free;
8535b2be 4521 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4522 if (p->arg.lock_seqid == NULL)
2f74c0a0 4523 goto out_free_seqid;
a5d16a4d 4524 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4525 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4526 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4527 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4528 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4529 p->lsp = lsp;
66179efe 4530 p->server = server;
a5d16a4d
TM		 4531 atomic_inc(&lsp->ls_count);
4532 p->ctx = get_nfs_open_context(ctx);
4533 memcpy(&p->fl, fl, sizeof(p->fl));
4534 return p;
2f74c0a0
TM		 4535out_free_seqid:
4536 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4537out_free:
4538 kfree(p);
4539 return NULL;
4540}
4541
4542static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4543{
4544 struct nfs4_lockdata *data = calldata;
4545 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4546
3110ff80 4547 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4548 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4549 return;
a5d16a4d
TM		 4550 /* Do we need to do an open_to_lock_owner? */
4551 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4552 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4553 return;
a5d16a4d
TM		 4554 data->arg.open_stateid = &state->stateid;
4555 data->arg.new_lock_owner = 1;
c1d51931 4556 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4557 } else
4558 data->arg.new_lock_owner = 0;
26e976a8 4559 data->timestamp = jiffies;
035168ab
TM		 4560 if (nfs4_setup_sequence(data->server,
4561 &data->arg.seq_args,
9d12b216 4562 &data->res.seq_res, task))
66179efe 4563 return;
5138fde0 4564 rpc_call_start(task);
3110ff80 4565 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4566}
4567
b257957e
AB		 4568static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4569{
4570 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4571 nfs4_lock_prepare(task, calldata);
4572}
4573
a5d16a4d
TM		 4574static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4575{
4576 struct nfs4_lockdata *data = calldata;
4577
3110ff80 4578 dprintk("%s: begin!\n", __func__);
a5d16a4d 4579
14516c3a
TM		 4580 if (!nfs4_sequence_done(task, &data->res.seq_res))
4581 return;
66179efe 4582
a5d16a4d 4583 data->rpc_status = task->tk_status;
a5d16a4d 4584 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4585 if (data->rpc_status == 0)
4586 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4587 else
4588 goto out;
4589 }
4590 if (data->rpc_status == 0) {
f597c537 4591 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4592 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4593 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4594 }
a5d16a4d 4595out:
3110ff80 4596 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4597}
4598
4599static void nfs4_lock_release(void *calldata)
4600{
4601 struct nfs4_lockdata *data = calldata;
4602
3110ff80 4603 dprintk("%s: begin!\n", __func__);
2f74c0a0 4604 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4605 if (data->cancelled != 0) {
4606 struct rpc_task *task;
4607 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4608 data->arg.lock_seqid);
4609 if (!IS_ERR(task))
bf294b41 4610 rpc_put_task_async(task);
3110ff80 4611 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4612 } else
4613 nfs_free_seqid(data->arg.lock_seqid);
4614 nfs4_put_lock_state(data->lsp);
4615 put_nfs_open_context(data->ctx);
4616 kfree(data);
3110ff80 4617 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4618}
4619
4620static const struct rpc_call_ops nfs4_lock_ops = {
4621 .rpc_call_prepare = nfs4_lock_prepare,
4622 .rpc_call_done = nfs4_lock_done,
4623 .rpc_release = nfs4_lock_release,
4624};
4625
b257957e
AB		 4626static const struct rpc_call_ops nfs4_recover_lock_ops = {
4627 .rpc_call_prepare = nfs4_recover_lock_prepare,
4628 .rpc_call_done = nfs4_lock_done,
4629 .rpc_release = nfs4_lock_release,
4630};
4631
2bee72a6
TM		 4632static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4633{
2bee72a6
TM		 4634 switch (error) {
4635 case -NFS4ERR_ADMIN_REVOKED:
4636 case -NFS4ERR_BAD_STATEID:
ecac799a 4637 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4638 if (new_lock_owner != 0 ||
795a88c9 4639 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4640 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4641 break;
4642 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4643 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4644 case -NFS4ERR_EXPIRED:
4645 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4646 };
4647}
4648
afe6c27c 4649static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4650{
4651 struct nfs4_lockdata *data;
4652 struct rpc_task *task;
5138fde0
TM		 4653 struct rpc_message msg = {
4654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4655 .rpc_cred = state->owner->so_cred,
4656 };
c970aa85
TM		 4657 struct rpc_task_setup task_setup_data = {
4658 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4659 .rpc_message = &msg,
c970aa85 4660 .callback_ops = &nfs4_lock_ops,
101070ca 4661 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4662 .flags = RPC_TASK_ASYNC,
4663 };
a5d16a4d
TM		 4664 int ret;
4665
3110ff80 4666 dprintk("%s: begin!\n", __func__);
cd3758e3 4667 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4668 fl->fl_u.nfs4_fl.owner,
4669 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4670 if (data == NULL)
4671 return -ENOMEM;
4672 if (IS_SETLKW(cmd))
4673 data->arg.block = 1;
b257957e
AB		 4674 if (recovery_type > NFS_LOCK_NEW) {
4675 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4676 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4677 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4678 }
9d12b216 4679 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4680 msg.rpc_argp = &data->arg;
4681 msg.rpc_resp = &data->res;
c970aa85
TM		 4682 task_setup_data.callback_data = data;
4683 task = rpc_run_task(&task_setup_data);
7a1218a2 4684 if (IS_ERR(task))
a5d16a4d 4685 return PTR_ERR(task);
a5d16a4d
TM		 4686 ret = nfs4_wait_for_completion_rpc_task(task);
4687 if (ret == 0) {
4688 ret = data->rpc_status;
2bee72a6
TM		 4689 if (ret)
4690 nfs4_handle_setlk_error(data->server, data->lsp,
4691 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4692 } else
4693 data->cancelled = 1;
e6b3c4db 4694 rpc_put_task(task);
3110ff80 4695 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4696 return ret;
1da177e4
LT		 4697}
4698
4699static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4700{
202b50dc 4701 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4702 struct nfs4_exception exception = {
4703 .inode = state->inode,
4704 };
202b50dc
TM		 4705 int err;
4706
4707 do {
42a2d13e
TM		 4708 /* Cache the lock if possible... */
4709 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4710 return 0;
afe6c27c 4711 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4712 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4713 break;
4714 nfs4_handle_exception(server, err, &exception);
4715 } while (exception.retry);
4716 return err;
1da177e4
LT		 4717}
4718
4719static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4720{
202b50dc 4721 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4722 struct nfs4_exception exception = {
4723 .inode = state->inode,
4724 };
202b50dc
TM		 4725 int err;
4726
6bfc93ef
TM		 4727 err = nfs4_set_lock_state(state, request);
4728 if (err != 0)
4729 return err;
202b50dc 4730 do {
42a2d13e
TM		 4731 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4732 return 0;
afe6c27c 4733 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4734 switch (err) {
4735 default:
4736 goto out;
4737 case -NFS4ERR_GRACE:
4738 case -NFS4ERR_DELAY:
4739 nfs4_handle_exception(server, err, &exception);
4740 err = 0;
4741 }
202b50dc 4742 } while (exception.retry);
a9ed2e25 4743out:
202b50dc 4744 return err;
1da177e4
LT		 4745}
4746
f062eb6c 4747#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4748/**
4749 * nfs41_check_expired_locks - possibly free a lock stateid
4750 *
4751 * @state: NFSv4 state for an inode
4752 *
4753 * Returns NFS_OK if recovery for this stateid is now finished.
4754 * Otherwise a negative NFS4ERR value is returned.
4755 */
b01dd1d8 4756static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4757{
eb64cf96 4758 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4759 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4760 struct nfs_server *server = NFS_SERVER(state->inode);
4761
b01dd1d8 4762 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4763 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4764 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4765 if (status != NFS_OK) {
3e60ffdd
CL		 4766 /* Free the stateid unless the server
4767 * informs us the stateid is unrecognized. */
89af2739
CL		 4768 if (status != -NFS4ERR_BAD_STATEID)
4769 nfs41_free_stateid(server,
4770 &lsp->ls_stateid);
795a88c9 4771 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4772 ret = status;
4773 }
4774 }
4775 };
4776
4777 return ret;
4778}
4779
4780static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4781{
4782 int status = NFS_OK;
4783
4784 if (test_bit(LK_STATE_IN_USE, &state->flags))
4785 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4786 if (status != NFS_OK)
4787 status = nfs4_lock_expired(state, request);
4788 return status;
f062eb6c
BS		 4789}
4790#endif
4791
1da177e4
LT		 4792static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4793{
19e03c57 4794 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4795 unsigned char fl_flags = request->fl_flags;
8e469ebd 4796 int status = -ENOLCK;
1da177e4 4797
8e469ebd
TM		 4798 if ((fl_flags & FL_POSIX) &&
4799 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4800 goto out;
6bfc93ef 4801 /* Is this a delegated open? */
6bfc93ef
TM		 4802 status = nfs4_set_lock_state(state, request);
4803 if (status != 0)
4804 goto out;
01c3b861
TM		 4805 request->fl_flags |= FL_ACCESS;
4806 status = do_vfs_lock(request->fl_file, request);
4807 if (status < 0)
4808 goto out;
19e03c57 4809 down_read(&nfsi->rwsem);
01c3b861 4810 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4811 /* Yes: cache locks! */
01c3b861 4812 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4813 request->fl_flags = fl_flags & ~FL_SLEEP;
4814 status = do_vfs_lock(request->fl_file, request);
4815 goto out_unlock;
01c3b861 4816 }
afe6c27c 4817 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4818 if (status != 0)
01c3b861 4819 goto out_unlock;
6bfc93ef 4820 /* Note: we always want to sleep here! */
01c3b861 4821 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4822 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4823 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4824 "manager!\n", __func__);
01c3b861 4825out_unlock:
19e03c57 4826 up_read(&nfsi->rwsem);
01c3b861
TM		 4827out:
4828 request->fl_flags = fl_flags;
1da177e4
LT		 4829 return status;
4830}
4831
4832static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4833{
a1d0b5ee
TM		 4834 struct nfs4_exception exception = {
4835 .state = state,
05ffe24f 4836 .inode = state->inode,
a1d0b5ee 4837 };
1da177e4
LT		 4838 int err;
4839
4840 do {
965b5d67
TM		 4841 err = _nfs4_proc_setlk(state, cmd, request);
4842 if (err == -NFS4ERR_DENIED)
4843 err = -EAGAIN;
1da177e4 4844 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4845 err, &exception);
1da177e4
LT		 4846 } while (exception.retry);
4847 return err;
4848}
4849
4850static int
4851nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4852{
4853 struct nfs_open_context *ctx;
4854 struct nfs4_state *state;
4855 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4856 int status;
4857
4858 /* verify open state */
cd3758e3 4859 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4860 state = ctx->state;
4861
4862 if (request->fl_start < 0 || request->fl_end < 0)
4863 return -EINVAL;
4864
d953126a
TM		 4865 if (IS_GETLK(cmd)) {
4866 if (state != NULL)
4867 return nfs4_proc_getlk(state, F_GETLK, request);
4868 return 0;
4869 }
1da177e4
LT		 4870
4871 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4872 return -EINVAL;
4873
d953126a
TM		 4874 if (request->fl_type == F_UNLCK) {
4875 if (state != NULL)
4876 return nfs4_proc_unlck(state, cmd, request);
4877 return 0;
4878 }
1da177e4 4879
d953126a
TM		 4880 if (state == NULL)
4881 return -ENOLCK;
55725513
TM		 4882 /*
4883 * Don't rely on the VFS having checked the file open mode,
4884 * since it won't do this for flock() locks.
4885 */
f44106e2 4886 switch (request->fl_type) {
55725513
TM		 4887 case F_RDLCK:
4888 if (!(filp->f_mode & FMODE_READ))
4889 return -EBADF;
4890 break;
4891 case F_WRLCK:
4892 if (!(filp->f_mode & FMODE_WRITE))
4893 return -EBADF;
4894 }
4895
1da177e4
LT		 4896 do {
4897 status = nfs4_proc_setlk(state, cmd, request);
4898 if ((status != -EAGAIN) || IS_SETLK(cmd))
4899 break;
4900 timeout = nfs4_set_lock_task_retry(timeout);
4901 status = -ERESTARTSYS;
4902 if (signalled())
4903 break;
4904 } while(status < 0);
1da177e4
LT		 4905 return status;
4906}
4907
888e694c
TM		 4908int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4909{
4910 struct nfs_server *server = NFS_SERVER(state->inode);
4911 struct nfs4_exception exception = { };
4912 int err;
4913
4914 err = nfs4_set_lock_state(state, fl);
4915 if (err != 0)
4916 goto out;
4917 do {
afe6c27c 4918 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4919 switch (err) {
4920 default:
a030889a
WAA		 4921 printk(KERN_ERR "NFS: %s: unhandled error "
4922 "%d.\n", __func__, err);
d5122201 4923 case 0:
965b5d67 4924 case -ESTALE:
d5122201
TM		 4925 goto out;
4926 case -NFS4ERR_EXPIRED:
0ced63d1 4927 nfs4_schedule_stateid_recovery(server, state);
d5122201 4928 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4929 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4930 nfs4_schedule_lease_recovery(server->nfs_client);
4931 goto out;
74e7bb73
RL		 4932 case -NFS4ERR_BADSESSION:
4933 case -NFS4ERR_BADSLOT:
4934 case -NFS4ERR_BAD_HIGH_SLOT:
4935 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4936 case -NFS4ERR_DEADSESSION:
9f594791 4937 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4938 goto out;
965b5d67
TM		 4939 case -ERESTARTSYS:
4940 /*
4941 * The show must go on: exit, but mark the
4942 * stateid as needing recovery.
4943 */
a1d0b5ee 4944 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4945 case -NFS4ERR_ADMIN_REVOKED:
4946 case -NFS4ERR_BAD_STATEID:
4947 case -NFS4ERR_OPENMODE:
0400a6b0 4948 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4949 err = 0;
4950 goto out;
168667c4
TM		 4951 case -EKEYEXPIRED:
4952 /*
4953 * User RPCSEC_GSS context has expired.
4954 * We cannot recover this stateid now, so
4955 * skip it and allow recovery thread to
4956 * proceed.
4957 */
4958 err = 0;
4959 goto out;
965b5d67
TM		 4960 case -ENOMEM:
4961 case -NFS4ERR_DENIED:
4962 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4963 err = 0;
4964 goto out;
d5122201
TM		 4965 case -NFS4ERR_DELAY:
4966 break;
4967 }
888e694c
TM		 4968 err = nfs4_handle_exception(server, err, &exception);
4969 } while (exception.retry);
4970out:
4971 return err;
4972}
6b3b5496 4973
cf470c3e
TM		 4974struct nfs_release_lockowner_data {
4975 struct nfs4_lock_state *lsp;
5ae67c4f 4976 struct nfs_server *server;
cf470c3e
TM		 4977 struct nfs_release_lockowner_args args;
4978};
4979
d3c7b7cc
TM		 4980static void nfs4_release_lockowner_release(void *calldata)
4981{
cf470c3e 4982 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4983 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4984 kfree(calldata);
4985}
4986
17280175 4987static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4988 .rpc_release = nfs4_release_lockowner_release,
4989};
4990
cf470c3e 4991int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 4992{
4993 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 4994 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 4995 struct rpc_message msg = {
4996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4997 };
4998
4999 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5000 return -EINVAL;
5001 data = kmalloc(sizeof(*data), GFP_NOFS);
5002 if (!data)
5003 return -ENOMEM;
5004 data->lsp = lsp;
5ae67c4f 5005 data->server = server;
cf470c3e
TM		 5006 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5007 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5008 data->args.lock_owner.s_dev = server->s_dev;
5009 msg.rpc_argp = &data->args;
5010 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5011 return 0;
d3c7b7cc
TM		 5012}
5013
aa1870af
BF		 5014#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5015
64c2ce8b
AK		 5016static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5017 const void *buf, size_t buflen,
5018 int flags, int type)
6b3b5496 5019{
64c2ce8b
AK		 5020 if (strcmp(key, "") != 0)
5021 return -EINVAL;
4b580ee3 5022
64c2ce8b 5023 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5024}
5025
64c2ce8b
AK		 5026static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5027 void *buf, size_t buflen, int type)
6b3b5496 5028{
64c2ce8b
AK		 5029 if (strcmp(key, "") != 0)
5030 return -EINVAL;
aa1870af 5031
64c2ce8b 5032 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5033}
5034
64c2ce8b
AK		 5035static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5036 size_t list_len, const char *name,
5037 size_t name_len, int type)
6b3b5496 5038{
64c2ce8b 5039 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5040
096455a2
BF		 5041 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5042 return 0;
64c2ce8b
AK		 5043
5044 if (list && len <= list_len)
5045 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5046 return len;
6b3b5496
BF		 5047}
5048
533eb461
AA		 5049/*
5050 * nfs_fhget will use either the mounted_on_fileid or the fileid
5051 */
69aaaae1
TM		 5052static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5053{
533eb461
AA		 5054 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5055 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5056 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5057 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5058 return;
5059
5060 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5061 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5062 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5063 fattr->nlink = 2;
5064}
5065
f05d147f
BS		 5066static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5067 const struct qstr *name,
5068 struct nfs4_fs_locations *fs_locations,
5069 struct page *page)
683b57b4
TM		 5070{
5071 struct nfs_server *server = NFS_SERVER(dir);
5072 u32 bitmask[2] = {
361e624f 5073 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5074 };
5075 struct nfs4_fs_locations_arg args = {
5076 .dir_fh = NFS_FH(dir),
c228fd3a 5077 .name = name,
683b57b4
TM		 5078 .page = page,
5079 .bitmask = bitmask,
5080 };
22958463
BH		 5081 struct nfs4_fs_locations_res res = {
5082 .fs_locations = fs_locations,
5083 };
683b57b4
TM		 5084 struct rpc_message msg = {
5085 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5086 .rpc_argp = &args,
22958463 5087 .rpc_resp = &res,
683b57b4
TM		 5088 };
5089 int status;
5090
3110ff80 5091 dprintk("%s: start\n", __func__);
533eb461
AA		 5092
5093 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5094 * is not supported */
5095 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5096 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5097 else
5098 bitmask[0] |= FATTR4_WORD0_FILEID;
5099
c228fd3a 5100 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5101 fs_locations->server = server;
830b8e33 5102 fs_locations->nlocations = 0;
f05d147f 5103 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5104 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5105 return status;
5106}
5107
f05d147f
BS		 5108int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5109 const struct qstr *name,
5110 struct nfs4_fs_locations *fs_locations,
5111 struct page *page)
db0a9593
BS		 5112{
5113 struct nfs4_exception exception = { };
5114 int err;
5115 do {
5116 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5117 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5118 &exception);
5119 } while (exception.retry);
5120 return err;
5121}
5122
5a5ea0d4
BS		 5123static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5124{
5125 int status;
5126 struct nfs4_secinfo_arg args = {
5127 .dir_fh = NFS_FH(dir),
5128 .name = name,
5129 };
5130 struct nfs4_secinfo_res res = {
5131 .flavors = flavors,
5132 };
5133 struct rpc_message msg = {
5134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5135 .rpc_argp = &args,
5136 .rpc_resp = &res,
5137 };
5138
5139 dprintk("NFS call secinfo %s\n", name->name);
5140 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5141 dprintk("NFS reply secinfo: %d\n", status);
5142 return status;
5143}
5144
72de53ec
BS		 5145int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5146 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5147{
5148 struct nfs4_exception exception = { };
5149 int err;
5150 do {
5151 err = nfs4_handle_exception(NFS_SERVER(dir),
5152 _nfs4_proc_secinfo(dir, name, flavors),
5153 &exception);
5154 } while (exception.retry);
5155 return err;
5156}
5157
557134a3 5158#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5159/*
5160 * Check the exchange flags returned by the server for invalid flags, having
5161 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5162 * DS flags set.
5163 */
5164static int nfs4_check_cl_exchange_flags(u32 flags)
5165{
5166 if (flags & ~EXCHGID4_FLAG_MASK_R)
5167 goto out_inval;
5168 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5169 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5170 goto out_inval;
5171 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5172 goto out_inval;
5173 return NFS_OK;
5174out_inval:
5175 return -NFS4ERR_INVAL;
5176}
5177
78fe0f41 5178static bool
79d4e1f0
CL		 5179nfs41_same_server_scope(struct nfs41_server_scope *a,
5180 struct nfs41_server_scope *b)
78fe0f41
WAA		 5181{
5182 if (a->server_scope_sz == b->server_scope_sz &&
5183 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5184 return true;
5185
5186 return false;
5187}
5188
7c44f1ae
WAA		 5189/*
5190 * nfs4_proc_bind_conn_to_session()
5191 *
5192 * The 4.1 client currently uses the same TCP connection for the
5193 * fore and backchannel.
5194 */
2cf047c9 5195int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5196{
5197 int status;
5198 struct nfs41_bind_conn_to_session_res res;
5199 struct rpc_message msg = {
5200 .rpc_proc =
5201 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5202 .rpc_argp = clp,
5203 .rpc_resp = &res,
2cf047c9 5204 .rpc_cred = cred,
7c44f1ae
WAA		 5205 };
5206
5207 dprintk("--> %s\n", __func__);
5208 BUG_ON(clp == NULL);
5209
5210 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5211 if (unlikely(res.session == NULL)) {
5212 status = -ENOMEM;
5213 goto out;
5214 }
5215
5216 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5217 if (status == 0) {
5218 if (memcmp(res.session->sess_id.data,
5219 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5220 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5221 status = -EIO;
5222 goto out_session;
5223 }
5224 if (res.dir != NFS4_CDFS4_BOTH) {
5225 dprintk("NFS: %s: Unexpected direction from server\n",
5226 __func__);
5227 status = -EIO;
5228 goto out_session;
5229 }
5230 if (res.use_conn_in_rdma_mode) {
5231 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5232 __func__);
5233 status = -EIO;
5234 goto out_session;
5235 }
5236 }
5237out_session:
5238 kfree(res.session);
5239out:
5240 dprintk("<-- %s status= %d\n", __func__, status);
5241 return status;
5242}
5243
99fe60d0
BH		 5244/*
5245 * nfs4_proc_exchange_id()
5246 *
6bbb4ae8
CL		 5247 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5248 *
99fe60d0
BH		 5249 * Since the clientid has expired, all compounds using sessions
5250 * associated with the stale clientid will be returning
5251 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5252 * be in some phase of session reset.
5253 */
4d643d1d 5254int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5255{
5256 nfs4_verifier verifier;
5257 struct nfs41_exchange_id_args args = {
cd93710e 5258 .verifier = &verifier,
99fe60d0 5259 .client = clp,
357f54d6 5260 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5261 };
5262 struct nfs41_exchange_id_res res = {
32b01310 5263 0
99fe60d0
BH		 5264 };
5265 int status;
5266 struct rpc_message msg = {
5267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5268 .rpc_argp = &args,
5269 .rpc_resp = &res,
5270 .rpc_cred = cred,
5271 };
99fe60d0 5272
f092075d 5273 nfs4_init_boot_verifier(clp, &verifier);
c7a360b0 5274 args.id_len = scnprintf(args.id, sizeof(args.id),
de734831 5275 "%s/%s",
c7a360b0 5276 clp->cl_ipaddr,
de734831 5277 clp->cl_rpcclient->cl_nodename);
6bbb4ae8
CL		 5278 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5280 args.id_len, args.id);
99fe60d0 5281
acdeb69d 5282 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5283 GFP_NOFS);
acdeb69d 5284 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5285 status = -ENOMEM;
5286 goto out;
5287 }
78fe0f41 5288
79d4e1f0 5289 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5290 GFP_NOFS);
177313f1 5291 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5292 status = -ENOMEM;
acdeb69d 5293 goto out_server_owner;
abe9a6d5 5294 }
78fe0f41 5295
bbafffd2 5296 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5297 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5298 status = -ENOMEM;
5299 goto out_server_scope;
5300 }
5301
1bd714f2 5302 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5303 if (status == 0)
32b01310 5304 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5305
acdeb69d 5306 if (status == 0) {
32b01310
TM		 5307 clp->cl_clientid = res.clientid;
5308 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5309 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5310 clp->cl_seqid = res.seqid;
5311
acdeb69d
CL		 5312 kfree(clp->cl_serverowner);
5313 clp->cl_serverowner = res.server_owner;
5314 res.server_owner = NULL;
78fe0f41 5315
7d2ed9ac 5316 /* use the most recent implementation id */
59155546
CL		 5317 kfree(clp->cl_implid);
5318 clp->cl_implid = res.impl_id;
7d2ed9ac 5319
177313f1 5320 if (clp->cl_serverscope != NULL &&
79d4e1f0 5321 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5322 res.server_scope)) {
5323 dprintk("%s: server_scope mismatch detected\n",
5324 __func__);
5325 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5326 kfree(clp->cl_serverscope);
5327 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5328 }
5329
177313f1 5330 if (clp->cl_serverscope == NULL) {
79d4e1f0 5331 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5332 goto out;
5333 }
32b01310
TM		 5334 } else
5335 kfree(res.impl_id);
7d2ed9ac 5336
acdeb69d
CL		 5337out_server_owner:
5338 kfree(res.server_owner);
7d2ed9ac 5339out_server_scope:
abe9a6d5
WAA		 5340 kfree(res.server_scope);
5341out:
177313f1 5342 if (clp->cl_implid != NULL)
6bbb4ae8 5343 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5344 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5345 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5346 clp->cl_implid->date.seconds,
5347 clp->cl_implid->date.nseconds);
6bbb4ae8 5348 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5349 return status;
5350}
5351
66245539
TM		 5352static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5353 struct rpc_cred *cred)
5354{
5355 struct rpc_message msg = {
5356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5357 .rpc_argp = clp,
5358 .rpc_cred = cred,
5359 };
5360 int status;
5361
5362 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5363 if (status)
02c67525 5364 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5365 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5366 return status;
5367}
5368
5369static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5370 struct rpc_cred *cred)
5371{
5372 unsigned int loop;
5373 int ret;
5374
5375 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5376 ret = _nfs4_proc_destroy_clientid(clp, cred);
5377 switch (ret) {
5378 case -NFS4ERR_DELAY:
5379 case -NFS4ERR_CLIENTID_BUSY:
5380 ssleep(1);
5381 break;
5382 default:
5383 return ret;
5384 }
5385 }
5386 return 0;
5387}
5388
5389int nfs4_destroy_clientid(struct nfs_client *clp)
5390{
5391 struct rpc_cred *cred;
5392 int ret = 0;
5393
5394 if (clp->cl_mvops->minor_version < 1)
5395 goto out;
5396 if (clp->cl_exchange_flags == 0)
5397 goto out;
5398 cred = nfs4_get_exchange_id_cred(clp);
5399 ret = nfs4_proc_destroy_clientid(clp, cred);
5400 if (cred)
5401 put_rpccred(cred);
5402 switch (ret) {
5403 case 0:
5404 case -NFS4ERR_STALE_CLIENTID:
5405 clp->cl_exchange_flags = 0;
5406 }
5407out:
5408 return ret;
5409}
5410
2050f0cc
AA		 5411struct nfs4_get_lease_time_data {
5412 struct nfs4_get_lease_time_args *args;
5413 struct nfs4_get_lease_time_res *res;
5414 struct nfs_client *clp;
5415};
5416
5417static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5418 void *calldata)
5419{
5420 int ret;
5421 struct nfs4_get_lease_time_data *data =
5422 (struct nfs4_get_lease_time_data *)calldata;
5423
5424 dprintk("--> %s\n", __func__);
689cf5c1 5425 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5426 /* just setup sequence, do not trigger session recovery
5427 since we're invoked within one */
5428 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5429 &data->args->la_seq_args,
9d12b216 5430 &data->res->lr_seq_res, task);
2050f0cc
AA		 5431
5432 BUG_ON(ret == -EAGAIN);
5433 rpc_call_start(task);
5434 dprintk("<-- %s\n", __func__);
5435}
5436
5437/*
5438 * Called from nfs4_state_manager thread for session setup, so don't recover
5439 * from sequence operation or clientid errors.
5440 */
5441static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5442{
5443 struct nfs4_get_lease_time_data *data =
5444 (struct nfs4_get_lease_time_data *)calldata;
5445
5446 dprintk("--> %s\n", __func__);
14516c3a
TM		 5447 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5448 return;
2050f0cc
AA		 5449 switch (task->tk_status) {
5450 case -NFS4ERR_DELAY:
5451 case -NFS4ERR_GRACE:
5452 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5453 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5454 task->tk_status = 0;
a8a4ae3a
AA		 5455 /* fall through */
5456 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5457 rpc_restart_call_prepare(task);
2050f0cc
AA		 5458 return;
5459 }
2050f0cc
AA		 5460 dprintk("<-- %s\n", __func__);
5461}
5462
17280175 5463static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5464 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5465 .rpc_call_done = nfs4_get_lease_time_done,
5466};
5467
5468int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5469{
5470 struct rpc_task *task;
5471 struct nfs4_get_lease_time_args args;
5472 struct nfs4_get_lease_time_res res = {
5473 .lr_fsinfo = fsinfo,
5474 };
5475 struct nfs4_get_lease_time_data data = {
5476 .args = &args,
5477 .res = &res,
5478 .clp = clp,
5479 };
5480 struct rpc_message msg = {
5481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5482 .rpc_argp = &args,
5483 .rpc_resp = &res,
5484 };
5485 struct rpc_task_setup task_setup = {
5486 .rpc_client = clp->cl_rpcclient,
5487 .rpc_message = &msg,
5488 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5489 .callback_data = &data,
5490 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5491 };
5492 int status;
5493
9d12b216 5494 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5495 dprintk("--> %s\n", __func__);
5496 task = rpc_run_task(&task_setup);
5497
5498 if (IS_ERR(task))
5499 status = PTR_ERR(task);
5500 else {
5501 status = task->tk_status;
5502 rpc_put_task(task);
5503 }
5504 dprintk("<-- %s return %d\n", __func__, status);
5505
5506 return status;
5507}
5508
f86f36a6
TM		 5509static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5510{
5511 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5512}
5513
5514static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5515 struct nfs4_slot *new,
5516 u32 max_slots,
5517 u32 ivalue)
5518{
5519 struct nfs4_slot *old = NULL;
5520 u32 i;
5521
5522 spin_lock(&tbl->slot_tbl_lock);
5523 if (new) {
5524 old = tbl->slots;
5525 tbl->slots = new;
5526 tbl->max_slots = max_slots;
5527 }
5528 tbl->highest_used_slotid = -1; /* no slot is currently used */
5529 for (i = 0; i < tbl->max_slots; i++)
5530 tbl->slots[i].seq_nr = ivalue;
5531 spin_unlock(&tbl->slot_tbl_lock);
5532 kfree(old);
5533}
5534
b73dafa7 5535/*
f86f36a6 5536 * (re)Initialise a slot table
b73dafa7 5537 */
f86f36a6
TM		 5538static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5539 u32 ivalue)
ac72b7b3 5540{
104aeba4 5541 struct nfs4_slot *new = NULL;
f86f36a6 5542 int ret = -ENOMEM;
ac72b7b3 5543
104aeba4
AA		 5544 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5545 max_reqs, tbl->max_slots);
ac72b7b3 5546
104aeba4
AA		 5547 /* Does the newly negotiated max_reqs match the existing slot table? */
5548 if (max_reqs != tbl->max_slots) {
f86f36a6 5549 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
104aeba4
AA		 5550 if (!new)
5551 goto out;
104aeba4 5552 }
f86f36a6
TM		 5553 ret = 0;
5554
5555 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
ac72b7b3
AA		 5556 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5557 tbl, tbl->slots, tbl->max_slots);
5558out:
5559 dprintk("<-- %s: return %d\n", __func__, ret);
5560 return ret;
5561}
5562
f8625a6a
RL		 5563/* Destroy the slot table */
5564static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5565{
5566 if (session->fc_slot_table.slots != NULL) {
5567 kfree(session->fc_slot_table.slots);
5568 session->fc_slot_table.slots = NULL;
5569 }
5570 if (session->bc_slot_table.slots != NULL) {
5571 kfree(session->bc_slot_table.slots);
5572 session->bc_slot_table.slots = NULL;
5573 }
5574 return;
5575}
5576
050047ce 5577/*
aacd5537 5578 * Initialize or reset the forechannel and backchannel tables
050047ce 5579 */
aacd5537 5580static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
050047ce 5581{
f26468fb 5582 struct nfs4_slot_table *tbl;
aacd5537 5583 int status;
050047ce 5584
aacd5537
AA		 5585 dprintk("--> %s\n", __func__);
5586 /* Fore channel */
5587 tbl = &ses->fc_slot_table;
f86f36a6
TM		 5588 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5589 if (status) /* -ENOMEM */
5590 return status;
aacd5537
AA		 5591 /* Back channel */
5592 tbl = &ses->bc_slot_table;
f86f36a6
TM		 5593 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5594 if (status && tbl->slots == NULL)
5595 /* Fore and back channel share a connection so get
5596 * both slot tables or neither */
5597 nfs4_destroy_slot_tables(ses);
f8625a6a 5598 return status;
557134a3
AA		 5599}
5600
5601struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5602{
5603 struct nfs4_session *session;
5604 struct nfs4_slot_table *tbl;
5605
8535b2be 5606 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5607 if (!session)
5608 return NULL;
76db6d95 5609
557134a3 5610 tbl = &session->fc_slot_table;
45d43c29 5611 tbl->highest_used_slotid = NFS4_NO_SLOT;
557134a3 5612 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5613 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5614 init_completion(&tbl->complete);
f8625a6a
RL		 5615
5616 tbl = &session->bc_slot_table;
45d43c29 5617 tbl->highest_used_slotid = NFS4_NO_SLOT;
f8625a6a
RL		 5618 spin_lock_init(&tbl->slot_tbl_lock);
5619 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5620 init_completion(&tbl->complete);
f8625a6a 5621
1055d76d
TM		 5622 session->session_state = 1<<NFS4_SESSION_INITING;
5623
557134a3
AA		 5624 session->clp = clp;
5625 return session;
5626}
5627
5628void nfs4_destroy_session(struct nfs4_session *session)
5629{
2446ab60 5630 struct rpc_xprt *xprt;
848f5bda 5631 struct rpc_cred *cred;
2446ab60 5632
848f5bda
TM		 5633 cred = nfs4_get_exchange_id_cred(session->clp);
5634 nfs4_proc_destroy_session(session, cred);
5635 if (cred)
5636 put_rpccred(cred);
2446ab60
TM		 5637
5638 rcu_read_lock();
5639 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5640 rcu_read_unlock();
5a0ffe54 5641 dprintk("%s Destroy backchannel for xprt %p\n",
2446ab60
TM		 5642 __func__, xprt);
5643 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
f8625a6a 5644 nfs4_destroy_slot_tables(session);
557134a3
AA		 5645 kfree(session);
5646}
5647
fc931582
AA		 5648/*
5649 * Initialize the values to be used by the client in CREATE_SESSION
5650 * If nfs4_init_session set the fore channel request and response sizes,
5651 * use them.
5652 *
5653 * Set the back channel max_resp_sz_cached to zero to force the client to
5654 * always set csa_cachethis to FALSE because the current implementation
5655 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5656 */
5657static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5658{
5659 struct nfs4_session *session = args->client->cl_session;
5660 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5661 mxresp_sz = session->fc_attrs.max_resp_sz;
5662
5663 if (mxrqst_sz == 0)
5664 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5665 if (mxresp_sz == 0)
5666 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5667 /* Fore channel attributes */
fc931582
AA		 5668 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5669 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5670 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5671 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5672
5673 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5674 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5675 __func__,
5676 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5677 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5678
5679 /* Back channel attributes */
fc931582
AA		 5680 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5681 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5682 args->bc_attrs.max_resp_sz_cached = 0;
5683 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5684 args->bc_attrs.max_reqs = 1;
5685
5686 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5687 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5688 __func__,
5689 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5690 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5691 args->bc_attrs.max_reqs);
5692}
5693
43c2e885 5694static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5695{
43c2e885
BF		 5696 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5697 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5698
43c2e885
BF		 5699 if (rcvd->max_resp_sz > sent->max_resp_sz)
5700 return -EINVAL;
5701 /*
5702 * Our requested max_ops is the minimum we need; we're not
5703 * prepared to break up compounds into smaller pieces than that.
5704 * So, no point even trying to continue if the server won't
5705 * cooperate:
5706 */
5707 if (rcvd->max_ops < sent->max_ops)
5708 return -EINVAL;
5709 if (rcvd->max_reqs == 0)
5710 return -EINVAL;
b4b9a0c1
VG		 5711 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5712 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5713 return 0;
8d35301d
AA		 5714}
5715
43c2e885
BF		 5716static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5717{
5718 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5719 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5720
43c2e885
BF		 5721 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5722 return -EINVAL;
5723 if (rcvd->max_resp_sz < sent->max_resp_sz)
5724 return -EINVAL;
5725 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5726 return -EINVAL;
5727 /* These would render the backchannel useless: */
b4b9a0c1 5728 if (rcvd->max_ops != sent->max_ops)
43c2e885 5729 return -EINVAL;
b4b9a0c1 5730 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5731 return -EINVAL;
5732 return 0;
5733}
8d35301d 5734
8d35301d
AA		 5735static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5736 struct nfs4_session *session)
5737{
43c2e885 5738 int ret;
8d35301d 5739
43c2e885
BF		 5740 ret = nfs4_verify_fore_channel_attrs(args, session);
5741 if (ret)
5742 return ret;
5743 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5744}
5745
848f5bda
TM		 5746static int _nfs4_proc_create_session(struct nfs_client *clp,
5747 struct rpc_cred *cred)
fc931582
AA		 5748{
5749 struct nfs4_session *session = clp->cl_session;
5750 struct nfs41_create_session_args args = {
5751 .client = clp,
5752 .cb_program = NFS4_CALLBACK,
5753 };
5754 struct nfs41_create_session_res res = {
5755 .client = clp,
5756 };
5757 struct rpc_message msg = {
5758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5759 .rpc_argp = &args,
5760 .rpc_resp = &res,
848f5bda 5761 .rpc_cred = cred,
fc931582
AA		 5762 };
5763 int status;
5764
5765 nfs4_init_channel_attrs(&args);
0f91421e 5766 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5767
1bd714f2 5768 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5769
8d35301d
AA		 5770 if (!status)
5771 /* Verify the session's negotiated channel_attrs values */
5772 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5773 if (!status) {
5774 /* Increment the clientid slot sequence id */
5775 clp->cl_seqid++;
5776 }
5777
5778 return status;
5779}
5780
5781/*
5782 * Issues a CREATE_SESSION operation to the server.
5783 * It is the responsibility of the caller to verify the session is
5784 * expired before calling this routine.
5785 */
848f5bda 5786int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5787{
5788 int status;
5789 unsigned *ptr;
fc931582
AA		 5790 struct nfs4_session *session = clp->cl_session;
5791
5792 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5793
848f5bda 5794 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5795 if (status)
5796 goto out;
5797
aacd5537
AA		 5798 /* Init or reset the session slot tables */
5799 status = nfs4_setup_session_slot_tables(session);
5800 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5801 if (status)
5802 goto out;
5803
5804 ptr = (unsigned *)&session->sess_id.data[0];
5805 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5806 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5807out:
5808 dprintk("<-- %s\n", __func__);
5809 return status;
5810}
5811
0f3e66c6
AA		 5812/*
5813 * Issue the over-the-wire RPC DESTROY_SESSION.
5814 * The caller must serialize access to this routine.
5815 */
848f5bda
TM		 5816int nfs4_proc_destroy_session(struct nfs4_session *session,
5817 struct rpc_cred *cred)
0f3e66c6 5818{
848f5bda
TM		 5819 struct rpc_message msg = {
5820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5821 .rpc_argp = session,
5822 .rpc_cred = cred,
5823 };
0f3e66c6 5824 int status = 0;
0f3e66c6
AA		 5825
5826 dprintk("--> nfs4_proc_destroy_session\n");
5827
5828 /* session is still being setup */
5829 if (session->clp->cl_cons_state != NFS_CS_READY)
5830 return status;
5831
1bd714f2 5832 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5833
5834 if (status)
08106ac7 5835 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5836 "Session has been destroyed regardless...\n", status);
5837
5838 dprintk("<-- nfs4_proc_destroy_session\n");
5839 return status;
5840}
5841
7b38c368
TM		 5842/*
5843 * With sessions, the client is not marked ready until after a
5844 * successful EXCHANGE_ID and CREATE_SESSION.
5845 *
5846 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5847 * other versions of NFS can be tried.
5848 */
5849static int nfs41_check_session_ready(struct nfs_client *clp)
5850{
5851 int ret;
5852
5853 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5854 ret = nfs4_client_recover_expired_lease(clp);
5855 if (ret)
5856 return ret;
5857 }
5858 if (clp->cl_cons_state < NFS_CS_READY)
5859 return -EPROTONOSUPPORT;
54ac471c 5860 smp_rmb();
7b38c368
TM		 5861 return 0;
5862}
5863
fccba804
TM		 5864int nfs4_init_session(struct nfs_server *server)
5865{
5866 struct nfs_client *clp = server->nfs_client;
2449ea2e 5867 struct nfs4_session *session;
68bf05ef 5868 unsigned int rsize, wsize;
fccba804
TM		 5869
5870 if (!nfs4_has_session(clp))
5871 return 0;
5872
1055d76d 5873 session = clp->cl_session;
7b38c368
TM		 5874 spin_lock(&clp->cl_lock);
5875 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
1055d76d 5876
7b38c368
TM		 5877 rsize = server->rsize;
5878 if (rsize == 0)
5879 rsize = NFS_MAX_FILE_IO_SIZE;
5880 wsize = server->wsize;
5881 if (wsize == 0)
5882 wsize = NFS_MAX_FILE_IO_SIZE;
68bf05ef 5883
7b38c368
TM		 5884 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5885 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5886 }
5887 spin_unlock(&clp->cl_lock);
2449ea2e 5888
7b38c368 5889 return nfs41_check_session_ready(clp);
fccba804
TM		 5890}
5891
7b38c368 5892int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
d83217c1
AA		 5893{
5894 struct nfs4_session *session = clp->cl_session;
5895 int ret;
5896
7b38c368
TM		 5897 spin_lock(&clp->cl_lock);
5898 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5899 /*
5900 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5901 * DS lease to be equal to the MDS lease.
5902 */
5903 clp->cl_lease_time = lease_time;
5904 clp->cl_last_renewal = jiffies;
5905 }
5906 spin_unlock(&clp->cl_lock);
d83217c1 5907
7b38c368
TM		 5908 ret = nfs41_check_session_ready(clp);
5909 if (ret)
5910 return ret;
5911 /* Test for the DS role */
5912 if (!is_ds_client(clp))
5913 return -ENODEV;
5914 return 0;
d83217c1
AA		 5915}
5916EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5917
5918
fc01cea9
AA		 5919/*
5920 * Renew the cl_session lease.
5921 */
d5f8d3fe
TM		 5922struct nfs4_sequence_data {
5923 struct nfs_client *clp;
5924 struct nfs4_sequence_args args;
5925 struct nfs4_sequence_res res;
5926};
5927
dc96aef9
AB		 5928static void nfs41_sequence_release(void *data)
5929{
d5f8d3fe
TM		 5930 struct nfs4_sequence_data *calldata = data;
5931 struct nfs_client *clp = calldata->clp;
dc96aef9 5932
7135840f
AB		 5933 if (atomic_read(&clp->cl_count) > 1)
5934 nfs4_schedule_state_renewal(clp);
5935 nfs_put_client(clp);
d5f8d3fe 5936 kfree(calldata);
dc96aef9
AB		 5937}
5938
aa5190d0
TM		 5939static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5940{
5941 switch(task->tk_status) {
5942 case -NFS4ERR_DELAY:
aa5190d0
TM		 5943 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5944 return -EAGAIN;
5945 default:
0400a6b0 5946 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5947 }
5948 return 0;
5949}
5950
dc96aef9 5951static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5952{
d5f8d3fe
TM		 5953 struct nfs4_sequence_data *calldata = data;
5954 struct nfs_client *clp = calldata->clp;
fc01cea9 5955
14516c3a
TM		 5956 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5957 return;
fc01cea9
AA		 5958
5959 if (task->tk_status < 0) {
5960 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5961 if (atomic_read(&clp->cl_count) == 1)
5962 goto out;
fc01cea9 5963
aa5190d0
TM		 5964 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5965 rpc_restart_call_prepare(task);
fc01cea9
AA		 5966 return;
5967 }
5968 }
fc01cea9 5969 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5970out:
fc01cea9
AA		 5971 dprintk("<-- %s\n", __func__);
5972}
5973
5974static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5975{
d5f8d3fe
TM		 5976 struct nfs4_sequence_data *calldata = data;
5977 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5978 struct nfs4_sequence_args *args;
5979 struct nfs4_sequence_res *res;
5980
fc01cea9
AA		 5981 args = task->tk_msg.rpc_argp;
5982 res = task->tk_msg.rpc_resp;
5983
9d12b216 5984 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5985 return;
5986 rpc_call_start(task);
5987}
5988
5989static const struct rpc_call_ops nfs41_sequence_ops = {
5990 .rpc_call_done = nfs41_sequence_call_done,
5991 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5992 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5993};
5994
71ac6da9 5995static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5996{
d5f8d3fe 5997 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5998 struct rpc_message msg = {
5999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6000 .rpc_cred = cred,
6001 };
71ac6da9
TM		 6002 struct rpc_task_setup task_setup_data = {
6003 .rpc_client = clp->cl_rpcclient,
6004 .rpc_message = &msg,
6005 .callback_ops = &nfs41_sequence_ops,
6006 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6007 };
fc01cea9 6008
7135840f 6009 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6010 return ERR_PTR(-EIO);
dfb4f309 6011 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6012 if (calldata == NULL) {
7135840f 6013 nfs_put_client(clp);
71ac6da9 6014 return ERR_PTR(-ENOMEM);
fc01cea9 6015 }
9d12b216 6016 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 6017 msg.rpc_argp = &calldata->args;
6018 msg.rpc_resp = &calldata->res;
6019 calldata->clp = clp;
71ac6da9 6020 task_setup_data.callback_data = calldata;
fc01cea9 6021
71ac6da9
TM		 6022 return rpc_run_task(&task_setup_data);
6023}
6024
2f60ea6b 6025static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6026{
6027 struct rpc_task *task;
6028 int ret = 0;
6029
2f60ea6b
TM		 6030 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6031 return 0;
71ac6da9
TM		 6032 task = _nfs41_proc_sequence(clp, cred);
6033 if (IS_ERR(task))
6034 ret = PTR_ERR(task);
6035 else
bf294b41 6036 rpc_put_task_async(task);
71ac6da9
TM		 6037 dprintk("<-- %s status=%d\n", __func__, ret);
6038 return ret;
6039}
6040
6041static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6042{
6043 struct rpc_task *task;
6044 int ret;
6045
6046 task = _nfs41_proc_sequence(clp, cred);
6047 if (IS_ERR(task)) {
6048 ret = PTR_ERR(task);
6049 goto out;
6050 }
6051 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6052 if (!ret) {
6053 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6054
6055 if (task->tk_status == 0)
6056 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6057 ret = task->tk_status;
b4410c2f 6058 }
71ac6da9
TM		 6059 rpc_put_task(task);
6060out:
6061 dprintk("<-- %s status=%d\n", __func__, ret);
6062 return ret;
fc01cea9
AA		 6063}
6064
fce5c838
RL		 6065struct nfs4_reclaim_complete_data {
6066 struct nfs_client *clp;
6067 struct nfs41_reclaim_complete_args arg;
6068 struct nfs41_reclaim_complete_res res;
6069};
6070
6071static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6072{
6073 struct nfs4_reclaim_complete_data *calldata = data;
6074
b257957e 6075 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 6076 if (nfs41_setup_sequence(calldata->clp->cl_session,
6077 &calldata->arg.seq_args,
9d12b216 6078 &calldata->res.seq_res, task))
fce5c838
RL		 6079 return;
6080
6081 rpc_call_start(task);
6082}
6083
aa5190d0
TM		 6084static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6085{
6086 switch(task->tk_status) {
6087 case 0:
6088 case -NFS4ERR_COMPLETE_ALREADY:
6089 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6090 break;
6091 case -NFS4ERR_DELAY:
aa5190d0 6092 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6093 /* fall through */
6094 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6095 return -EAGAIN;
6096 default:
0400a6b0 6097 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6098 }
6099 return 0;
6100}
6101
fce5c838
RL		 6102static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6103{
6104 struct nfs4_reclaim_complete_data *calldata = data;
6105 struct nfs_client *clp = calldata->clp;
6106 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6107
6108 dprintk("--> %s\n", __func__);
14516c3a
TM		 6109 if (!nfs41_sequence_done(task, res))
6110 return;
fce5c838 6111
aa5190d0
TM		 6112 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6113 rpc_restart_call_prepare(task);
6114 return;
6115 }
fce5c838
RL		 6116 dprintk("<-- %s\n", __func__);
6117}
6118
6119static void nfs4_free_reclaim_complete_data(void *data)
6120{
6121 struct nfs4_reclaim_complete_data *calldata = data;
6122
6123 kfree(calldata);
6124}
6125
6126static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6127 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6128 .rpc_call_done = nfs4_reclaim_complete_done,
6129 .rpc_release = nfs4_free_reclaim_complete_data,
6130};
6131
6132/*
6133 * Issue a global reclaim complete.
6134 */
6135static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6136{
6137 struct nfs4_reclaim_complete_data *calldata;
6138 struct rpc_task *task;
6139 struct rpc_message msg = {
6140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6141 };
6142 struct rpc_task_setup task_setup_data = {
6143 .rpc_client = clp->cl_rpcclient,
6144 .rpc_message = &msg,
6145 .callback_ops = &nfs4_reclaim_complete_call_ops,
6146 .flags = RPC_TASK_ASYNC,
6147 };
6148 int status = -ENOMEM;
6149
6150 dprintk("--> %s\n", __func__);
8535b2be 6151 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6152 if (calldata == NULL)
6153 goto out;
6154 calldata->clp = clp;
6155 calldata->arg.one_fs = 0;
fce5c838 6156
9d12b216 6157 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 6158 msg.rpc_argp = &calldata->arg;
6159 msg.rpc_resp = &calldata->res;
6160 task_setup_data.callback_data = calldata;
6161 task = rpc_run_task(&task_setup_data);
acf82b85 6162 if (IS_ERR(task)) {
fce5c838 6163 status = PTR_ERR(task);
acf82b85
DC		 6164 goto out;
6165 }
c34c32ea
AA		 6166 status = nfs4_wait_for_completion_rpc_task(task);
6167 if (status == 0)
6168 status = task->tk_status;
fce5c838 6169 rpc_put_task(task);
acf82b85 6170 return 0;
fce5c838
RL		 6171out:
6172 dprintk("<-- %s status=%d\n", __func__, status);
6173 return status;
6174}
b1f69b75
AA		 6175
6176static void
6177nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6178{
6179 struct nfs4_layoutget *lgp = calldata;
c31663d4 6180 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6181
6182 dprintk("--> %s\n", __func__);
c31663d4
FI		 6183 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6184 * right now covering the LAYOUTGET we are about to send.
6185 * However, that is not so catastrophic, and there seems
6186 * to be no way to prevent it completely.
6187 */
b1f69b75 6188 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6189 &lgp->res.seq_res, task))
b1f69b75 6190 return;
cf7d63f1
FI		 6191 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6192 NFS_I(lgp->args.inode)->layout,
6193 lgp->args.ctx->state)) {
6194 rpc_exit(task, NFS4_OK);
6195 return;
6196 }
b1f69b75
AA		 6197 rpc_call_start(task);
6198}
6199
6200static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6201{
6202 struct nfs4_layoutget *lgp = calldata;
6203 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6204
6205 dprintk("--> %s\n", __func__);
6206
6207 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6208 return;
6209
6210 switch (task->tk_status) {
6211 case 0:
6212 break;
6213 case -NFS4ERR_LAYOUTTRYLATER:
6214 case -NFS4ERR_RECALLCONFLICT:
6215 task->tk_status = -NFS4ERR_DELAY;
6216 /* Fall through */
6217 default:
6218 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6219 rpc_restart_call_prepare(task);
6220 return;
6221 }
6222 }
b1f69b75
AA		 6223 dprintk("<-- %s\n", __func__);
6224}
6225
8554116e
IK		 6226static size_t max_response_pages(struct nfs_server *server)
6227{
6228 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6229 return nfs_page_array_len(0, max_resp_sz);
6230}
6231
6232static void nfs4_free_pages(struct page **pages, size_t size)
6233{
6234 int i;
6235
6236 if (!pages)
6237 return;
6238
6239 for (i = 0; i < size; i++) {
6240 if (!pages[i])
6241 break;
6242 __free_page(pages[i]);
6243 }
6244 kfree(pages);
6245}
6246
6247static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6248{
6249 struct page **pages;
6250 int i;
6251
6252 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6253 if (!pages) {
6254 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6255 return NULL;
6256 }
6257
6258 for (i = 0; i < size; i++) {
6259 pages[i] = alloc_page(gfp_flags);
6260 if (!pages[i]) {
6261 dprintk("%s: failed to allocate page\n", __func__);
6262 nfs4_free_pages(pages, size);
6263 return NULL;
6264 }
6265 }
6266
6267 return pages;
6268}
6269
b1f69b75
AA		 6270static void nfs4_layoutget_release(void *calldata)
6271{
6272 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6273 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6274 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6275
6276 dprintk("--> %s\n", __func__);
8554116e 6277 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6278 put_nfs_open_context(lgp->args.ctx);
6279 kfree(calldata);
6280 dprintk("<-- %s\n", __func__);
6281}
6282
6283static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6284 .rpc_call_prepare = nfs4_layoutget_prepare,
6285 .rpc_call_done = nfs4_layoutget_done,
6286 .rpc_release = nfs4_layoutget_release,
6287};
6288
a0b0a6e3
TM		 6289struct pnfs_layout_segment *
6290nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6291{
6292 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6293 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6294 struct rpc_task *task;
6295 struct rpc_message msg = {
6296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6297 .rpc_argp = &lgp->args,
6298 .rpc_resp = &lgp->res,
6299 };
6300 struct rpc_task_setup task_setup_data = {
6301 .rpc_client = server->client,
6302 .rpc_message = &msg,
6303 .callback_ops = &nfs4_layoutget_call_ops,
6304 .callback_data = lgp,
6305 .flags = RPC_TASK_ASYNC,
6306 };
a0b0a6e3 6307 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6308 int status = 0;
6309
6310 dprintk("--> %s\n", __func__);
6311
8554116e
IK		 6312 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6313 if (!lgp->args.layout.pages) {
6314 nfs4_layoutget_release(lgp);
a0b0a6e3 6315 return ERR_PTR(-ENOMEM);
8554116e
IK		 6316 }
6317 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6318
35124a09 6319 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6320 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6321 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6322 task = rpc_run_task(&task_setup_data);
6323 if (IS_ERR(task))
a0b0a6e3 6324 return ERR_CAST(task);
b1f69b75 6325 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6326 if (status == 0)
6327 status = task->tk_status;
6328 if (status == 0)
a0b0a6e3 6329 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6330 rpc_put_task(task);
6331 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6332 if (status)
6333 return ERR_PTR(status);
6334 return lseg;
b1f69b75
AA		 6335}
6336
cbe82603
BH		 6337static void
6338nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6339{
6340 struct nfs4_layoutreturn *lrp = calldata;
6341
6342 dprintk("--> %s\n", __func__);
6343 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6344 &lrp->res.seq_res, task))
cbe82603
BH		 6345 return;
6346 rpc_call_start(task);
6347}
6348
6349static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6350{
6351 struct nfs4_layoutreturn *lrp = calldata;
6352 struct nfs_server *server;
a56aaa02 6353 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6354
6355 dprintk("--> %s\n", __func__);
6356
6357 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6358 return;
6359
6360 server = NFS_SERVER(lrp->args.inode);
6361 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6362 rpc_restart_call_prepare(task);
cbe82603
BH		 6363 return;
6364 }
a2e1d4f2 6365 spin_lock(&lo->plh_inode->i_lock);
47fbf797
TM		 6366 if (task->tk_status == 0 && lrp->res.lrs_present)
6367 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
a2e1d4f2
FI		 6368 lo->plh_block_lgets--;
6369 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 6370 dprintk("<-- %s\n", __func__);
6371}
6372
6373static void nfs4_layoutreturn_release(void *calldata)
6374{
6375 struct nfs4_layoutreturn *lrp = calldata;
6376
6377 dprintk("--> %s\n", __func__);
70c3bd2b 6378 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6379 kfree(calldata);
6380 dprintk("<-- %s\n", __func__);
6381}
6382
6383static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6384 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6385 .rpc_call_done = nfs4_layoutreturn_done,
6386 .rpc_release = nfs4_layoutreturn_release,
6387};
6388
6389int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6390{
6391 struct rpc_task *task;
6392 struct rpc_message msg = {
6393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6394 .rpc_argp = &lrp->args,
6395 .rpc_resp = &lrp->res,
6396 };
6397 struct rpc_task_setup task_setup_data = {
6398 .rpc_client = lrp->clp->cl_rpcclient,
6399 .rpc_message = &msg,
6400 .callback_ops = &nfs4_layoutreturn_call_ops,
6401 .callback_data = lrp,
6402 };
6403 int status;
6404
6405 dprintk("--> %s\n", __func__);
9d12b216 6406 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6407 task = rpc_run_task(&task_setup_data);
6408 if (IS_ERR(task))
6409 return PTR_ERR(task);
6410 status = task->tk_status;
6411 dprintk("<-- %s status=%d\n", __func__, status);
6412 rpc_put_task(task);
6413 return status;
6414}
6415
7f11d8d3
AA		 6416/*
6417 * Retrieve the list of Data Server devices from the MDS.
6418 */
6419static int _nfs4_getdevicelist(struct nfs_server *server,
6420 const struct nfs_fh *fh,
6421 struct pnfs_devicelist *devlist)
6422{
6423 struct nfs4_getdevicelist_args args = {
6424 .fh = fh,
6425 .layoutclass = server->pnfs_curr_ld->id,
6426 };
6427 struct nfs4_getdevicelist_res res = {
6428 .devlist = devlist,
6429 };
6430 struct rpc_message msg = {
6431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6432 .rpc_argp = &args,
6433 .rpc_resp = &res,
6434 };
6435 int status;
6436
6437 dprintk("--> %s\n", __func__);
6438 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6439 &res.seq_res, 0);
6440 dprintk("<-- %s status=%d\n", __func__, status);
6441 return status;
6442}
6443
6444int nfs4_proc_getdevicelist(struct nfs_server *server,
6445 const struct nfs_fh *fh,
6446 struct pnfs_devicelist *devlist)
6447{
6448 struct nfs4_exception exception = { };
6449 int err;
6450
6451 do {
6452 err = nfs4_handle_exception(server,
6453 _nfs4_getdevicelist(server, fh, devlist),
6454 &exception);
6455 } while (exception.retry);
6456
6457 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6458 err, devlist->num_devs);
6459
6460 return err;
6461}
6462EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6463
b1f69b75
AA		 6464static int
6465_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6466{
6467 struct nfs4_getdeviceinfo_args args = {
6468 .pdev = pdev,
6469 };
6470 struct nfs4_getdeviceinfo_res res = {
6471 .pdev = pdev,
6472 };
6473 struct rpc_message msg = {
6474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6475 .rpc_argp = &args,
6476 .rpc_resp = &res,
6477 };
6478 int status;
6479
6480 dprintk("--> %s\n", __func__);
7c513058 6481 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6482 dprintk("<-- %s status=%d\n", __func__, status);
6483
6484 return status;
6485}
6486
6487int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6488{
6489 struct nfs4_exception exception = { };
6490 int err;
6491
6492 do {
6493 err = nfs4_handle_exception(server,
6494 _nfs4_proc_getdeviceinfo(server, pdev),
6495 &exception);
6496 } while (exception.retry);
6497 return err;
6498}
6499EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6500
863a3c6c
AA		 6501static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6502{
6503 struct nfs4_layoutcommit_data *data = calldata;
6504 struct nfs_server *server = NFS_SERVER(data->args.inode);
6505
6506 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6507 &data->res.seq_res, task))
863a3c6c
AA		 6508 return;
6509 rpc_call_start(task);
6510}
6511
6512static void
6513nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6514{
6515 struct nfs4_layoutcommit_data *data = calldata;
6516 struct nfs_server *server = NFS_SERVER(data->args.inode);
6517
6518 if (!nfs4_sequence_done(task, &data->res.seq_res))
6519 return;
6520
6521 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6522 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6523 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6524 case -NFS4ERR_BADLAYOUT: /* no layout */
6525 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6526 task->tk_status = 0;
e59d27e0
TM		 6527 break;
6528 case 0:
863a3c6c
AA		 6529 nfs_post_op_update_inode_force_wcc(data->args.inode,
6530 data->res.fattr);
e59d27e0
TM		 6531 break;
6532 default:
6533 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6534 rpc_restart_call_prepare(task);
6535 return;
6536 }
6537 }
863a3c6c
AA		 6538}
6539
6540static void nfs4_layoutcommit_release(void *calldata)
6541{
6542 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6543 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6544 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6545
db29c089 6546 pnfs_cleanup_layoutcommit(data);
863a3c6c 6547 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6548 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6549 list_del_init(&lseg->pls_lc_list);
6550 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6551 &lseg->pls_flags))
9369a431 6552 pnfs_put_lseg(lseg);
a9bae566 6553 }
92407e75
PT		 6554
6555 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6556 smp_mb__after_clear_bit();
6557 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6558
863a3c6c
AA		 6559 put_rpccred(data->cred);
6560 kfree(data);
6561}
6562
6563static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6564 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6565 .rpc_call_done = nfs4_layoutcommit_done,
6566 .rpc_release = nfs4_layoutcommit_release,
6567};
6568
6569int
ef311537 6570nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6571{
6572 struct rpc_message msg = {
6573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6574 .rpc_argp = &data->args,
6575 .rpc_resp = &data->res,
6576 .rpc_cred = data->cred,
6577 };
6578 struct rpc_task_setup task_setup_data = {
6579 .task = &data->task,
6580 .rpc_client = NFS_CLIENT(data->args.inode),
6581 .rpc_message = &msg,
6582 .callback_ops = &nfs4_layoutcommit_ops,
6583 .callback_data = data,
6584 .flags = RPC_TASK_ASYNC,
6585 };
6586 struct rpc_task *task;
6587 int status = 0;
6588
6589 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6590 "lbw: %llu inode %lu\n",
6591 data->task.tk_pid, sync,
6592 data->args.lastbytewritten,
6593 data->args.inode->i_ino);
6594
9d12b216 6595 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6596 task = rpc_run_task(&task_setup_data);
6597 if (IS_ERR(task))
6598 return PTR_ERR(task);
ef311537 6599 if (sync == false)
863a3c6c
AA		 6600 goto out;
6601 status = nfs4_wait_for_completion_rpc_task(task);
6602 if (status != 0)
6603 goto out;
6604 status = task->tk_status;
6605out:
6606 dprintk("%s: status %d\n", __func__, status);
6607 rpc_put_task(task);
6608 return status;
6609}
fca78d6d
BS		 6610
6611static int
6612_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6613 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6614{
6615 struct nfs41_secinfo_no_name_args args = {
6616 .style = SECINFO_STYLE_CURRENT_FH,
6617 };
6618 struct nfs4_secinfo_res res = {
6619 .flavors = flavors,
6620 };
6621 struct rpc_message msg = {
6622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6623 .rpc_argp = &args,
6624 .rpc_resp = &res,
6625 };
6626 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6627}
6628
6629static int
6630nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6631 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6632{
6633 struct nfs4_exception exception = { };
6634 int err;
6635 do {
6636 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6637 switch (err) {
6638 case 0:
6639 case -NFS4ERR_WRONGSEC:
6640 case -NFS4ERR_NOTSUPP:
05e9cfb4 6641 goto out;
fca78d6d
BS		 6642 default:
6643 err = nfs4_handle_exception(server, err, &exception);
6644 }
6645 } while (exception.retry);
05e9cfb4 6646out:
fca78d6d
BS		 6647 return err;
6648}
6649
6650static int
6651nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6652 struct nfs_fsinfo *info)
6653{
6654 int err;
6655 struct page *page;
6656 rpc_authflavor_t flavor;
6657 struct nfs4_secinfo_flavors *flavors;
6658
6659 page = alloc_page(GFP_KERNEL);
6660 if (!page) {
6661 err = -ENOMEM;
6662 goto out;
6663 }
6664
6665 flavors = page_address(page);
6666 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6667
6668 /*
6669 * Fall back on "guess and check" method if
6670 * the server doesn't support SECINFO_NO_NAME
6671 */
6672 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6673 err = nfs4_find_root_sec(server, fhandle, info);
6674 goto out_freepage;
6675 }
6676 if (err)
6677 goto out_freepage;
6678
6679 flavor = nfs_find_best_sec(flavors);
6680 if (err == 0)
6681 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6682
6683out_freepage:
6684 put_page(page);
6685 if (err == -EACCES)
6686 return -EPERM;
6687out:
6688 return err;
6689}
1cab0652
BS		 6690
6691static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6692{
6693 int status;
6694 struct nfs41_test_stateid_args args = {
1cab0652 6695 .stateid = stateid,
7d974794
BS		 6696 };
6697 struct nfs41_test_stateid_res res;
6698 struct rpc_message msg = {
6699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6700 .rpc_argp = &args,
6701 .rpc_resp = &res,
6702 };
1cab0652 6703
38527b15 6704 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6705 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6706 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6707 if (status != NFS_OK) {
6708 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6709 return status;
38527b15
CL		 6710 }
6711 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6712 return -res.status;
7d974794
BS		 6713}
6714
38527b15
CL		 6715/**
6716 * nfs41_test_stateid - perform a TEST_STATEID operation
6717 *
6718 * @server: server / transport on which to perform the operation
6719 * @stateid: state ID to test
6720 *
6721 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6722 * Otherwise a negative NFS4ERR value is returned if the operation
6723 * failed or the state ID is not currently valid.
6724 */
1cab0652 6725static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6726{
6727 struct nfs4_exception exception = { };
6728 int err;
6729 do {
377e507d
CL		 6730 err = _nfs41_test_stateid(server, stateid);
6731 if (err != -NFS4ERR_DELAY)
6732 break;
6733 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6734 } while (exception.retry);
6735 return err;
6736}
9aeda35f 6737
1cab0652 6738static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6739{
9aeda35f 6740 struct nfs41_free_stateid_args args = {
1cab0652 6741 .stateid = stateid,
9aeda35f
BS		 6742 };
6743 struct nfs41_free_stateid_res res;
6744 struct rpc_message msg = {
6745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6746 .rpc_argp = &args,
6747 .rpc_resp = &res,
6748 };
38527b15 6749 int status;
9aeda35f 6750
38527b15 6751 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6752 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6753 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6754 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6755 dprintk("NFS reply free_stateid: %d\n", status);
6756 return status;
9aeda35f
BS		 6757}
6758
38527b15
CL		 6759/**
6760 * nfs41_free_stateid - perform a FREE_STATEID operation
6761 *
6762 * @server: server / transport on which to perform the operation
6763 * @stateid: state ID to release
6764 *
6765 * Returns NFS_OK if the server freed "stateid". Otherwise a
6766 * negative NFS4ERR value is returned.
6767 */
1cab0652 6768static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6769{
6770 struct nfs4_exception exception = { };
6771 int err;
6772 do {
377e507d
CL		 6773 err = _nfs4_free_stateid(server, stateid);
6774 if (err != -NFS4ERR_DELAY)
6775 break;
6776 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6777 } while (exception.retry);
6778 return err;
6779}
36281caa
TM		 6780
6781static bool nfs41_match_stateid(const nfs4_stateid *s1,
6782 const nfs4_stateid *s2)
6783{
2d2f24ad 6784 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6785 return false;
6786
2d2f24ad 6787 if (s1->seqid == s2->seqid)
36281caa 6788 return true;
2d2f24ad 6789 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6790 return true;
6791
6792 return false;
6793}
6794
557134a3
AA		 6795#endif /* CONFIG_NFS_V4_1 */
6796
36281caa
TM		 6797static bool nfs4_match_stateid(const nfs4_stateid *s1,
6798 const nfs4_stateid *s2)
6799{
f597c537 6800 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6801}
6802
6803
17280175 6804static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6805 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6806 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6807 .recover_open = nfs4_open_reclaim,
6808 .recover_lock = nfs4_lock_reclaim,
591d71cb 6809 .establish_clid = nfs4_init_clientid,
90a16617 6810 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6811};
6812
591d71cb 6813#if defined(CONFIG_NFS_V4_1)
17280175 6814static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6815 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6816 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6817 .recover_open = nfs4_open_reclaim,
6818 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6819 .establish_clid = nfs41_init_clientid,
b4b82607 6820 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6821 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6822};
6823#endif /* CONFIG_NFS_V4_1 */
6824
17280175 6825static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6826 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6827 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6828 .recover_open = nfs4_open_expired,
6829 .recover_lock = nfs4_lock_expired,
6830 .establish_clid = nfs4_init_clientid,
90a16617 6831 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6832};
6833
6834#if defined(CONFIG_NFS_V4_1)
17280175 6835static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6836 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6837 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6838 .recover_open = nfs41_open_expired,
6839 .recover_lock = nfs41_lock_expired,
4d643d1d 6840 .establish_clid = nfs41_init_clientid,
b4b82607 6841 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6842};
591d71cb 6843#endif /* CONFIG_NFS_V4_1 */
1da177e4 6844
17280175 6845static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6846 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6847 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6848 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6849};
6850
6851#if defined(CONFIG_NFS_V4_1)
17280175 6852static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6853 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6854 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6855 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6856};
6857#endif
6858
97dc1359
TM		 6859static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6860 .minor_version = 0,
6861 .call_sync = _nfs4_call_sync,
36281caa 6862 .match_stateid = nfs4_match_stateid,
fca78d6d 6863 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6864 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6865 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6866 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6867};
6868
6869#if defined(CONFIG_NFS_V4_1)
6870static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6871 .minor_version = 1,
6872 .call_sync = _nfs4_call_sync_session,
36281caa 6873 .match_stateid = nfs41_match_stateid,
fca78d6d 6874 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6875 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6876 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6877 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6878};
6879#endif
6880
97dc1359
TM		 6881const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6882 [0] = &nfs_v4_0_minor_ops,
6883#if defined(CONFIG_NFS_V4_1)
6884 [1] = &nfs_v4_1_minor_ops,
6885#endif
6886};
6887
73a79706
BS		 6888const struct inode_operations nfs4_dir_inode_operations = {
6889 .create = nfs_create,
6890 .lookup = nfs_lookup,
6891 .atomic_open = nfs_atomic_open,
6892 .link = nfs_link,
6893 .unlink = nfs_unlink,
6894 .symlink = nfs_symlink,
6895 .mkdir = nfs_mkdir,
6896 .rmdir = nfs_rmdir,
6897 .mknod = nfs_mknod,
6898 .rename = nfs_rename,
6899 .permission = nfs_permission,
6900 .getattr = nfs_getattr,
6901 .setattr = nfs_setattr,
6902 .getxattr = generic_getxattr,
6903 .setxattr = generic_setxattr,
6904 .listxattr = generic_listxattr,
6905 .removexattr = generic_removexattr,
6906};
6907
92e1d5be 6908static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6909 .permission = nfs_permission,
6910 .getattr = nfs_getattr,
6911 .setattr = nfs_setattr,
64c2ce8b
AK		 6912 .getxattr = generic_getxattr,
6913 .setxattr = generic_setxattr,
6914 .listxattr = generic_listxattr,
6915 .removexattr = generic_removexattr,
6b3b5496
BF		 6916};
6917
509de811 6918const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6919 .version = 4, /* protocol version */
6920 .dentry_ops = &nfs4_dentry_operations,
6921 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6922 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6923 .file_ops = &nfs4_file_operations,
1da177e4 6924 .getroot = nfs4_proc_get_root,
281cad46 6925 .submount = nfs4_submount,
ff9099f2 6926 .try_mount = nfs4_try_mount,
1da177e4
LT		 6927 .getattr = nfs4_proc_getattr,
6928 .setattr = nfs4_proc_setattr,
6929 .lookup = nfs4_proc_lookup,
6930 .access = nfs4_proc_access,
6931 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6932 .create = nfs4_proc_create,
6933 .remove = nfs4_proc_remove,
6934 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6935 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6936 .unlink_done = nfs4_proc_unlink_done,
6937 .rename = nfs4_proc_rename,
d3d4152a 6938 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6939 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6940 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6941 .link = nfs4_proc_link,
6942 .symlink = nfs4_proc_symlink,
6943 .mkdir = nfs4_proc_mkdir,
6944 .rmdir = nfs4_proc_remove,
6945 .readdir = nfs4_proc_readdir,
6946 .mknod = nfs4_proc_mknod,
6947 .statfs = nfs4_proc_statfs,
6948 .fsinfo = nfs4_proc_fsinfo,
6949 .pathconf = nfs4_proc_pathconf,
e9326dca 6950 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6951 .decode_dirent = nfs4_decode_dirent,
6952 .read_setup = nfs4_proc_read_setup,
1abb5088 6953 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6954 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6955 .read_done = nfs4_read_done,
1da177e4 6956 .write_setup = nfs4_proc_write_setup,
57208fa7 6957 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6958 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6959 .write_done = nfs4_write_done,
1da177e4 6960 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6961 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6962 .commit_done = nfs4_commit_done,
1da177e4 6963 .lock = nfs4_proc_lock,
e50a1c2e 6964 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6965 .close_context = nfs4_close_context,
2b484297 6966 .open_context = nfs4_atomic_open,
011e2a7f 6967 .have_delegation = nfs4_have_delegation,
57ec14c5 6968 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6969 .alloc_client = nfs4_alloc_client,
45a52a02 6970 .init_client = nfs4_init_client,
cdb7eced 6971 .free_client = nfs4_free_client,
1179acc6
BS		 6972 .create_server = nfs4_create_server,
6973 .clone_server = nfs_clone_server,
1da177e4
LT		 6974};
6975
64c2ce8b
AK		 6976static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6977 .prefix = XATTR_NAME_NFSV4_ACL,
6978 .list = nfs4_xattr_list_nfs4_acl,
6979 .get = nfs4_xattr_get_nfs4_acl,
6980 .set = nfs4_xattr_set_nfs4_acl,
6981};
6982
6983const struct xattr_handler *nfs4_xattr_handlers[] = {
6984 &nfs4_xattr_nfs4_acl_handler,
6985 NULL
6986};
6987
1da177e4
LT		 6988/*
6989 * Local variables:
6990 * c-basic-offset: 8
6991 * End:
6992 */
Linux 6.x block layer and io_uring tree(s)