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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
[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>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 52#include <linux/xattr.h>
c7a360b0 53#include <linux/utsname.h>
1da177e4 54
4ce79717 55#include "nfs4_fs.h"
1da177e4 56#include "delegation.h"
101070ca 57#include "internal.h"
006ea73e 58#include "iostat.h"
fc931582 59#include "callback.h"
b1f69b75 60#include "pnfs.h"
1da177e4
LT		 61
62#define NFSDBG_FACILITY NFSDBG_PROC
63
2066fe89 64#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 65#define NFS4_POLL_RETRY_MAX (15*HZ)
66
a78cb57a
TM		 67#define NFS4_MAX_LOOP_ON_RECOVER (10)
68
cdd4e68b 69struct nfs4_opendata;
864472e9 70static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 71static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 72static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 73static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 74static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
75static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 76static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
77 struct nfs_fattr *fattr, struct iattr *sattr,
78 struct nfs4_state *state);
1da177e4 79
1da177e4 80/* Prevent leaks of NFSv4 errors into userland */
46f72f57 81static int nfs4_map_errors(int err)
1da177e4 82{
52567b03
TM		 83 if (err >= -1000)
84 return err;
85 switch (err) {
86 case -NFS4ERR_RESOURCE:
87 return -EREMOTEIO;
3ddeb7c5
TM		 88 case -NFS4ERR_BADOWNER:
89 case -NFS4ERR_BADNAME:
90 return -EINVAL;
52567b03 91 default:
1da177e4 92 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 93 __func__, -err);
52567b03 94 break;
1da177e4 95 }
52567b03 96 return -EIO;
1da177e4
LT		 97}
98
99/*
100 * This is our standard bitmap for GETATTR requests.
101 */
102const u32 nfs4_fattr_bitmap[2] = {
103 FATTR4_WORD0_TYPE
104 | FATTR4_WORD0_CHANGE
105 | FATTR4_WORD0_SIZE
106 | FATTR4_WORD0_FSID
107 | FATTR4_WORD0_FILEID,
108 FATTR4_WORD1_MODE
109 | FATTR4_WORD1_NUMLINKS
110 | FATTR4_WORD1_OWNER
111 | FATTR4_WORD1_OWNER_GROUP
112 | FATTR4_WORD1_RAWDEV
113 | FATTR4_WORD1_SPACE_USED
114 | FATTR4_WORD1_TIME_ACCESS
115 | FATTR4_WORD1_TIME_METADATA
116 | FATTR4_WORD1_TIME_MODIFY
117};
118
119const u32 nfs4_statfs_bitmap[2] = {
120 FATTR4_WORD0_FILES_AVAIL
121 | FATTR4_WORD0_FILES_FREE
122 | FATTR4_WORD0_FILES_TOTAL,
123 FATTR4_WORD1_SPACE_AVAIL
124 | FATTR4_WORD1_SPACE_FREE
125 | FATTR4_WORD1_SPACE_TOTAL
126};
127
4ce79717 128const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 129 FATTR4_WORD0_MAXLINK
130 | FATTR4_WORD0_MAXNAME,
131 0
132};
133
134const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
135 | FATTR4_WORD0_MAXREAD
136 | FATTR4_WORD0_MAXWRITE
137 | FATTR4_WORD0_LEASE_TIME,
55b6e774 138 FATTR4_WORD1_TIME_DELTA
504913fb 139 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 140};
141
830b8e33
MN		 142const u32 nfs4_fs_locations_bitmap[2] = {
143 FATTR4_WORD0_TYPE
144 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_SIZE
146 | FATTR4_WORD0_FSID
147 | FATTR4_WORD0_FILEID
148 | FATTR4_WORD0_FS_LOCATIONS,
149 FATTR4_WORD1_MODE
150 | FATTR4_WORD1_NUMLINKS
151 | FATTR4_WORD1_OWNER
152 | FATTR4_WORD1_OWNER_GROUP
153 | FATTR4_WORD1_RAWDEV
154 | FATTR4_WORD1_SPACE_USED
155 | FATTR4_WORD1_TIME_ACCESS
156 | FATTR4_WORD1_TIME_METADATA
157 | FATTR4_WORD1_TIME_MODIFY
158 | FATTR4_WORD1_MOUNTED_ON_FILEID
159};
160
bc4785cd 161static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 162 struct nfs4_readdir_arg *readdir)
163{
0dbb4c67 164 __be32 *start, *p;
1da177e4
LT		 165
166 BUG_ON(readdir->count < 80);
167 if (cookie > 2) {
b7ef1956 168 readdir->cookie = cookie;
1da177e4
LT		 169 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
170 return;
171 }
172
173 readdir->cookie = 0;
174 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
175 if (cookie == 2)
176 return;
177
178 /*
179 * NFSv4 servers do not return entries for '.' and '..'
180 * Therefore, we fake these entries here. We let '.'
181 * have cookie 0 and '..' have cookie 1. Note that
182 * when talking to the server, we always send cookie 0
183 * instead of 1 or 2.
184 */
0dbb4c67 185 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 186
187 if (cookie == 0) {
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_one; /* cookie, second word */
191 *p++ = xdr_one; /* entry len */
192 memcpy(p, ".\0\0\0", 4); /* entry */
193 p++;
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
4e769b93 197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 198 }
199
200 *p++ = xdr_one; /* next */
201 *p++ = xdr_zero; /* cookie, first word */
202 *p++ = xdr_two; /* cookie, second word */
203 *p++ = xdr_two; /* entry len */
204 memcpy(p, "..\0\0", 4); /* entry */
205 p++;
206 *p++ = xdr_one; /* bitmap length */
207 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
208 *p++ = htonl(8); /* attribute buffer length */
4e769b93 209 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 210
211 readdir->pgbase = (char *)p - (char *)start;
212 readdir->count -= readdir->pgbase;
213 kunmap_atomic(start, KM_USER0);
214}
215
65de872e
TM		 216static int nfs4_wait_clnt_recover(struct nfs_client *clp)
217{
218 int res;
219
220 might_sleep();
221
e005e804 222 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 223 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 224 return res;
225}
226
227static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
228{
229 int res = 0;
230
231 might_sleep();
232
233 if (*timeout <= 0)
234 *timeout = NFS4_POLL_RETRY_MIN;
235 if (*timeout > NFS4_POLL_RETRY_MAX)
236 *timeout = NFS4_POLL_RETRY_MAX;
237 schedule_timeout_killable(*timeout);
238 if (fatal_signal_pending(current))
239 res = -ERESTARTSYS;
240 *timeout <<= 1;
241 return res;
242}
243
244/* This is the error handling routine for processes that are allowed
245 * to sleep.
246 */
b064eca2 247static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 248{
249 struct nfs_client *clp = server->nfs_client;
9e33bed5 250 struct nfs4_state *state = exception->state;
65de872e
TM		 251 int ret = errorcode;
252
253 exception->retry = 0;
254 switch(errorcode) {
255 case 0:
256 return 0;
9e33bed5
TM		 257 case -NFS4ERR_ADMIN_REVOKED:
258 case -NFS4ERR_BAD_STATEID:
259 case -NFS4ERR_OPENMODE:
260 if (state == NULL)
261 break;
0400a6b0
TM		 262 nfs4_schedule_stateid_recovery(server, state);
263 goto wait_on_recovery;
65de872e 264 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 265 case -NFS4ERR_STALE_CLIENTID:
65de872e 266 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 267 nfs4_schedule_lease_recovery(clp);
268 goto wait_on_recovery;
03391693 269#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 270 case -NFS4ERR_BADSESSION:
271 case -NFS4ERR_BADSLOT:
272 case -NFS4ERR_BAD_HIGH_SLOT:
273 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
274 case -NFS4ERR_DEADSESSION:
275 case -NFS4ERR_SEQ_FALSE_RETRY:
276 case -NFS4ERR_SEQ_MISORDERED:
277 dprintk("%s ERROR: %d Reset session\n", __func__,
278 errorcode);
0400a6b0 279 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 280 exception->retry = 1;
b9179237 281 break;
03391693 282#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 283 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 284 if (exception->timeout > HZ) {
285 /* We have retried a decent amount, time to
286 * fail
287 */
288 ret = -EBUSY;
289 break;
290 }
65de872e
TM		 291 case -NFS4ERR_GRACE:
292 case -NFS4ERR_DELAY:
2c643488 293 case -EKEYEXPIRED:
65de872e
TM		 294 ret = nfs4_delay(server->client, &exception->timeout);
295 if (ret != 0)
296 break;
297 case -NFS4ERR_OLD_STATEID:
298 exception->retry = 1;
b064eca2
TM		 299 break;
300 case -NFS4ERR_BADOWNER:
301 /* The following works around a Linux server bug! */
302 case -NFS4ERR_BADNAME:
303 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
304 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
305 exception->retry = 1;
306 printk(KERN_WARNING "NFS: v4 server %s "
307 "does not accept raw "
308 "uid/gids. "
309 "Reenabling the idmapper.\n",
310 server->nfs_client->cl_hostname);
311 }
65de872e
TM		 312 }
313 /* We failed to handle the error */
314 return nfs4_map_errors(ret);
0400a6b0 315wait_on_recovery:
a2c0b9e2
TM		 316 ret = nfs4_wait_clnt_recover(clp);
317 if (ret == 0)
318 exception->retry = 1;
319 return ret;
65de872e
TM		 320}
321
322
452e9352 323static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 324{
1da177e4
LT		 325 spin_lock(&clp->cl_lock);
326 if (time_before(clp->cl_last_renewal,timestamp))
327 clp->cl_last_renewal = timestamp;
328 spin_unlock(&clp->cl_lock);
329}
330
452e9352
TM		 331static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
332{
333 do_renew_lease(server->nfs_client, timestamp);
334}
335
cccef3b9
AA		 336#if defined(CONFIG_NFS_V4_1)
337
e2c4ab3c
AA		 338/*
339 * nfs4_free_slot - free a slot and efficiently update slot table.
340 *
341 * freeing a slot is trivially done by clearing its respective bit
342 * in the bitmap.
343 * If the freed slotid equals highest_used_slotid we want to update it
344 * so that the server would be able to size down the slot table if needed,
345 * otherwise we know that the highest_used_slotid is still in use.
346 * When updating highest_used_slotid there may be "holes" in the bitmap
347 * so we need to scan down from highest_used_slotid to 0 looking for the now
348 * highest slotid in use.
349 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 350 *
351 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 352 */
353static void
dfb4f309 354nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 355{
dfb4f309 356 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 357 int slotid = free_slotid;
358
dfb4f309 359 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 360 /* clear used bit in bitmap */
361 __clear_bit(slotid, tbl->used_slots);
362
363 /* update highest_used_slotid when it is freed */
364 if (slotid == tbl->highest_used_slotid) {
365 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 366 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 367 tbl->highest_used_slotid = slotid;
368 else
369 tbl->highest_used_slotid = -1;
370 }
e2c4ab3c
AA		 371 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
372 free_slotid, tbl->highest_used_slotid);
373}
374
3bfb0fc5 375/*
42acd021 376 * Signal state manager thread if session fore channel is drained
3bfb0fc5 377 */
42acd021 378static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 379{
689cf5c1
AB		 380 struct rpc_task *task;
381
a2118c33 382 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 383 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
384 if (task)
385 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 386 return;
387 }
388
389 if (ses->fc_slot_table.highest_used_slotid != -1)
390 return;
391
42acd021
AA		 392 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
393 complete(&ses->fc_slot_table.complete);
394}
395
396/*
397 * Signal state manager thread if session back channel is drained
398 */
399void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
400{
401 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
402 ses->bc_slot_table.highest_used_slotid != -1)
403 return;
404 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
405 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 406}
407
d185a334 408static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 409{
410 struct nfs4_slot_table *tbl;
411
d185a334 412 tbl = &res->sr_session->fc_slot_table;
dfb4f309 413 if (!res->sr_slot) {
13615871
AA		 414 /* just wake up the next guy waiting since
415 * we may have not consumed a slot after all */
691daf3b 416 dprintk("%s: No slot\n", __func__);
35dc1d74 417 return;
13615871 418 }
ea028ac9 419
35dc1d74 420 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 421 nfs4_free_slot(tbl, res->sr_slot);
42acd021 422 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 423 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 424 res->sr_slot = NULL;
13615871
AA		 425}
426
14516c3a 427static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 428{
429 unsigned long timestamp;
14516c3a 430 struct nfs_client *clp;
b0df806c
AA		 431
432 /*
433 * sr_status remains 1 if an RPC level error occurred. The server
434 * may or may not have processed the sequence operation..
435 * Proceed as if the server received and processed the sequence
436 * operation.
437 */
438 if (res->sr_status == 1)
439 res->sr_status = NFS_OK;
440
441 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 442 if (!res->sr_slot)
b0df806c
AA		 443 goto out;
444
691daf3b 445 /* Check the SEQUENCE operation status */
14516c3a
TM		 446 switch (res->sr_status) {
447 case 0:
b0df806c 448 /* Update the slot's sequence and clientid lease timer */
dfb4f309 449 ++res->sr_slot->seq_nr;
b0df806c 450 timestamp = res->sr_renewal_time;
14516c3a 451 clp = res->sr_session->clp;
452e9352 452 do_renew_lease(clp, timestamp);
0629e370 453 /* Check sequence flags */
b4410c2f
TM		 454 if (res->sr_status_flags != 0)
455 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 456 break;
457 case -NFS4ERR_DELAY:
458 /* The server detected a resend of the RPC call and
459 * returned NFS4ERR_DELAY as per Section 2.10.6.2
460 * of RFC5661.
461 */
12364a4f 462 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 463 __func__,
464 res->sr_slot - res->sr_session->fc_slot_table.slots,
465 res->sr_slot->seq_nr);
14516c3a
TM		 466 goto out_retry;
467 default:
468 /* Just update the slot sequence no. */
dfb4f309 469 ++res->sr_slot->seq_nr;
b0df806c
AA		 470 }
471out:
472 /* The session may be reset by one of the error handlers. */
473 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 474 nfs41_sequence_free_slot(res);
14516c3a
TM		 475 return 1;
476out_retry:
d05dd4e9 477 if (!rpc_restart_call(task))
14516c3a
TM		 478 goto out;
479 rpc_delay(task, NFS4_POLL_RETRY_MAX);
480 return 0;
b0df806c
AA		 481}
482
14516c3a
TM		 483static int nfs4_sequence_done(struct rpc_task *task,
484 struct nfs4_sequence_res *res)
df896455 485{
14516c3a
TM		 486 if (res->sr_session == NULL)
487 return 1;
488 return nfs41_sequence_done(task, res);
df896455
TM		 489}
490
510b8175
BH		 491/*
492 * nfs4_find_slot - efficiently look for a free slot
493 *
494 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
495 * If found, we mark the slot as used, update the highest_used_slotid,
496 * and respectively set up the sequence operation args.
497 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 498 *
499 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 500 */
501static u8
40ead580 502nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 503{
504 int slotid;
505 u8 ret_id = NFS4_MAX_SLOT_TABLE;
506 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
507
510b8175
BH		 508 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
509 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
510 tbl->max_slots);
511 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
512 if (slotid >= tbl->max_slots)
513 goto out;
514 __set_bit(slotid, tbl->used_slots);
515 if (slotid > tbl->highest_used_slotid)
516 tbl->highest_used_slotid = slotid;
517 ret_id = slotid;
518out:
519 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
520 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 521 return ret_id;
522}
523
dc70d7b3 524int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 525 struct nfs4_sequence_args *args,
526 struct nfs4_sequence_res *res,
527 int cache_reply,
528 struct rpc_task *task)
529{
fbcd4abc
AA		 530 struct nfs4_slot *slot;
531 struct nfs4_slot_table *tbl;
532 u8 slotid;
533
534 dprintk("--> %s\n", __func__);
ce5039c1 535 /* slot already allocated? */
dfb4f309 536 if (res->sr_slot != NULL)
ce5039c1
AA		 537 return 0;
538
fbcd4abc
AA		 539 tbl = &session->fc_slot_table;
540
541 spin_lock(&tbl->slot_tbl_lock);
a2118c33 542 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 543 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 544 /*
545 * The state manager will wait until the slot table is empty.
546 * Schedule the reset thread
547 */
05f0d236 548 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 549 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 550 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 551 return -EAGAIN;
b069d94a
AA		 552 }
553
689cf5c1
AB		 554 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
555 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
556 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
557 spin_unlock(&tbl->slot_tbl_lock);
558 dprintk("%s enforce FIFO order\n", __func__);
559 return -EAGAIN;
560 }
561
40ead580 562 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 563 if (slotid == NFS4_MAX_SLOT_TABLE) {
564 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
565 spin_unlock(&tbl->slot_tbl_lock);
566 dprintk("<-- %s: no free slots\n", __func__);
567 return -EAGAIN;
568 }
569 spin_unlock(&tbl->slot_tbl_lock);
570
689cf5c1 571 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 572 slot = tbl->slots + slotid;
99fe60d0 573 args->sa_session = session;
fbcd4abc
AA		 574 args->sa_slotid = slotid;
575 args->sa_cache_this = cache_reply;
576
577 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
578
99fe60d0 579 res->sr_session = session;
dfb4f309 580 res->sr_slot = slot;
fbcd4abc 581 res->sr_renewal_time = jiffies;
2a6e26cd 582 res->sr_status_flags = 0;
fbcd4abc
AA		 583 /*
584 * sr_status is only set in decode_sequence, and so will remain
585 * set to 1 if an rpc level failure occurs.
586 */
587 res->sr_status = 1;
ce5039c1
AA		 588 return 0;
589}
dc70d7b3 590EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 591
035168ab 592int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 593 struct nfs4_sequence_args *args,
594 struct nfs4_sequence_res *res,
595 int cache_reply,
596 struct rpc_task *task)
597{
035168ab 598 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 599 int ret = 0;
600
035168ab
TM		 601 if (session == NULL) {
602 args->sa_session = NULL;
603 res->sr_session = NULL;
604 goto out;
605 }
606
12364a4f 607 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 608 __func__, session->clp, session, res->sr_slot ?
609 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 610
035168ab 611 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 612 task);
ce5039c1
AA		 613out:
614 dprintk("<-- %s status=%d\n", __func__, ret);
615 return ret;
616}
617
618struct nfs41_call_sync_data {
035168ab 619 const struct nfs_server *seq_server;
ce5039c1
AA		 620 struct nfs4_sequence_args *seq_args;
621 struct nfs4_sequence_res *seq_res;
622 int cache_reply;
623};
624
625static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
626{
627 struct nfs41_call_sync_data *data = calldata;
628
035168ab
TM		 629 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
630
631 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 632 data->seq_res, data->cache_reply, task))
633 return;
634 rpc_call_start(task);
635}
636
b257957e
AB		 637static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
638{
639 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
640 nfs41_call_sync_prepare(task, calldata);
641}
642
69ab40c4
AA		 643static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
644{
645 struct nfs41_call_sync_data *data = calldata;
646
14516c3a 647 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 648}
649
ce5039c1
AA		 650struct rpc_call_ops nfs41_call_sync_ops = {
651 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 652 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 653};
654
b257957e
AB		 655struct rpc_call_ops nfs41_call_priv_sync_ops = {
656 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
657 .rpc_call_done = nfs41_call_sync_done,
658};
659
035168ab 660static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 661 struct rpc_message *msg,
662 struct nfs4_sequence_args *args,
663 struct nfs4_sequence_res *res,
b257957e
AB		 664 int cache_reply,
665 int privileged)
ce5039c1
AA		 666{
667 int ret;
668 struct rpc_task *task;
669 struct nfs41_call_sync_data data = {
035168ab 670 .seq_server = server,
ce5039c1
AA		 671 .seq_args = args,
672 .seq_res = res,
673 .cache_reply = cache_reply,
674 };
675 struct rpc_task_setup task_setup = {
035168ab 676 .rpc_client = server->client,
ce5039c1
AA		 677 .rpc_message = msg,
678 .callback_ops = &nfs41_call_sync_ops,
679 .callback_data = &data
680 };
681
dfb4f309 682 res->sr_slot = NULL;
b257957e
AB		 683 if (privileged)
684 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 685 task = rpc_run_task(&task_setup);
686 if (IS_ERR(task))
687 ret = PTR_ERR(task);
688 else {
689 ret = task->tk_status;
690 rpc_put_task(task);
691 }
692 return ret;
693}
694
cccef3b9
AA		 695int _nfs4_call_sync_session(struct nfs_server *server,
696 struct rpc_message *msg,
697 struct nfs4_sequence_args *args,
698 struct nfs4_sequence_res *res,
699 int cache_reply)
700{
035168ab 701 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 702}
703
df896455 704#else
14516c3a
TM		 705static int nfs4_sequence_done(struct rpc_task *task,
706 struct nfs4_sequence_res *res)
df896455 707{
14516c3a 708 return 1;
df896455 709}
cccef3b9
AA		 710#endif /* CONFIG_NFS_V4_1 */
711
712int _nfs4_call_sync(struct nfs_server *server,
713 struct rpc_message *msg,
714 struct nfs4_sequence_args *args,
715 struct nfs4_sequence_res *res,
716 int cache_reply)
717{
f3752975 718 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 719 return rpc_call_sync(server->client, msg, 0);
720}
721
722#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 723 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 724 &(res)->seq_res, (cache_reply))
725
38478b24 726static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 727{
38478b24 728 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 729
38478b24 730 spin_lock(&dir->i_lock);
40d24704
TM		 731 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
732 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 733 nfs_force_lookup_revalidate(dir);
40d24704 734 nfsi->change_attr = cinfo->after;
38478b24 735 spin_unlock(&dir->i_lock);
1da177e4
LT		 736}
737
e56e0b78 738struct nfs4_opendata {
c6d00e63 739 struct kref kref;
e56e0b78
TM		 740 struct nfs_openargs o_arg;
741 struct nfs_openres o_res;
cdd4e68b
TM		 742 struct nfs_open_confirmargs c_arg;
743 struct nfs_open_confirmres c_res;
e56e0b78
TM		 744 struct nfs_fattr f_attr;
745 struct nfs_fattr dir_attr;
ad389da7 746 struct path path;
e56e0b78
TM		 747 struct dentry *dir;
748 struct nfs4_state_owner *owner;
aac00a8d 749 struct nfs4_state *state;
e56e0b78 750 struct iattr attrs;
26e976a8 751 unsigned long timestamp;
3e309914 752 unsigned int rpc_done : 1;
24ac23ab
TM		 753 int rpc_status;
754 int cancelled;
e56e0b78
TM		 755};
756
2ced46c2
TM		 757
758static void nfs4_init_opendata_res(struct nfs4_opendata *p)
759{
760 p->o_res.f_attr = &p->f_attr;
761 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 762 p->o_res.seqid = p->o_arg.seqid;
763 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 764 p->o_res.server = p->o_arg.server;
765 nfs_fattr_init(&p->f_attr);
766 nfs_fattr_init(&p->dir_attr);
767}
768
ad389da7 769static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 770 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 771 const struct iattr *attrs,
772 gfp_t gfp_mask)
e56e0b78 773{
ad389da7 774 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 775 struct inode *dir = parent->d_inode;
776 struct nfs_server *server = NFS_SERVER(dir);
777 struct nfs4_opendata *p;
778
8535b2be 779 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 780 if (p == NULL)
781 goto err;
8535b2be 782 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 783 if (p->o_arg.seqid == NULL)
784 goto err_free;
f6948697
AV		 785 path_get(path);
786 p->path = *path;
e56e0b78
TM		 787 p->dir = parent;
788 p->owner = sp;
789 atomic_inc(&sp->so_count);
790 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 791 p->o_arg.open_flags = flags;
792 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 793 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 794 p->o_arg.id = sp->so_owner_id.id;
ad389da7 795 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 796 p->o_arg.server = server;
797 p->o_arg.bitmask = server->attr_bitmask;
798 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 799 if (flags & O_CREAT) {
800 u32 *s;
801
e56e0b78
TM		 802 p->o_arg.u.attrs = &p->attrs;
803 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 804 s = (u32 *) p->o_arg.u.verifier.data;
805 s[0] = jiffies;
806 s[1] = current->pid;
e56e0b78 807 }
cdd4e68b
TM		 808 p->c_arg.fh = &p->o_res.fh;
809 p->c_arg.stateid = &p->o_res.stateid;
810 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 811 nfs4_init_opendata_res(p);
c6d00e63 812 kref_init(&p->kref);
e56e0b78
TM		 813 return p;
814err_free:
815 kfree(p);
816err:
817 dput(parent);
818 return NULL;
819}
820
c6d00e63 821static void nfs4_opendata_free(struct kref *kref)
e56e0b78 822{
c6d00e63
TM		 823 struct nfs4_opendata *p = container_of(kref,
824 struct nfs4_opendata, kref);
825
826 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 827 if (p->state != NULL)
828 nfs4_put_open_state(p->state);
c6d00e63
TM		 829 nfs4_put_state_owner(p->owner);
830 dput(p->dir);
31f31db1 831 path_put(&p->path);
c6d00e63
TM		 832 kfree(p);
833}
834
835static void nfs4_opendata_put(struct nfs4_opendata *p)
836{
837 if (p != NULL)
838 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 839}
840
06f814a3
TM		 841static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
842{
06f814a3
TM		 843 int ret;
844
06f814a3 845 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 846 return ret;
847}
848
dc0b027d 849static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 850{
851 int ret = 0;
dc0b027d
TM		 852
853 if (open_mode & O_EXCL)
854 goto out;
855 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 856 case FMODE_READ:
88069f77
TM		 857 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
858 && state->n_rdonly != 0;
6ee41268
TM		 859 break;
860 case FMODE_WRITE:
88069f77
TM		 861 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
862 && state->n_wronly != 0;
6ee41268
TM		 863 break;
864 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 865 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
866 && state->n_rdwr != 0;
6ee41268 867 }
dc0b027d 868out:
6ee41268
TM		 869 return ret;
870}
871
dc0b027d 872static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 873{
dc0b027d 874 if ((delegation->type & fmode) != fmode)
aac00a8d 875 return 0;
15c831bf 876 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 877 return 0;
b7391f44 878 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 879 return 1;
880}
881
dc0b027d 882static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 883{
dc0b027d 884 switch (fmode) {
e7616923
TM		 885 case FMODE_WRITE:
886 state->n_wronly++;
887 break;
888 case FMODE_READ:
889 state->n_rdonly++;
890 break;
891 case FMODE_READ|FMODE_WRITE:
892 state->n_rdwr++;
893 }
dc0b027d 894 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 895}
896
dc0b027d 897static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 898{
899 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
900 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
901 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 902 switch (fmode) {
003707c7
TM		 903 case FMODE_READ:
904 set_bit(NFS_O_RDONLY_STATE, &state->flags);
905 break;
906 case FMODE_WRITE:
907 set_bit(NFS_O_WRONLY_STATE, &state->flags);
908 break;
909 case FMODE_READ|FMODE_WRITE:
910 set_bit(NFS_O_RDWR_STATE, &state->flags);
911 }
e7616923
TM		 912}
913
dc0b027d 914static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 915{
8bda4e4c 916 write_seqlock(&state->seqlock);
dc0b027d 917 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 918 write_sequnlock(&state->seqlock);
003707c7
TM		 919}
920
dc0b027d 921static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 922{
8bda4e4c
TM		 923 /*
924 * Protect the call to nfs4_state_set_mode_locked and
925 * serialise the stateid update
926 */
927 write_seqlock(&state->seqlock);
003707c7
TM		 928 if (deleg_stateid != NULL) {
929 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
930 set_bit(NFS_DELEGATED_STATE, &state->flags);
931 }
932 if (open_stateid != NULL)
dc0b027d 933 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 934 write_sequnlock(&state->seqlock);
935 spin_lock(&state->owner->so_lock);
dc0b027d 936 update_open_stateflags(state, fmode);
ec073428 937 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 938}
939
dc0b027d 940static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 941{
942 struct nfs_inode *nfsi = NFS_I(state->inode);
943 struct nfs_delegation *deleg_cur;
944 int ret = 0;
945
dc0b027d 946 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 947
948 rcu_read_lock();
949 deleg_cur = rcu_dereference(nfsi->delegation);
950 if (deleg_cur == NULL)
951 goto no_delegation;
952
953 spin_lock(&deleg_cur->lock);
954 if (nfsi->delegation != deleg_cur ||
dc0b027d 955 (deleg_cur->type & fmode) != fmode)
34310430
TM		 956 goto no_delegation_unlock;
957
958 if (delegation == NULL)
959 delegation = &deleg_cur->stateid;
960 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
961 goto no_delegation_unlock;
962
b7391f44 963 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 964 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 965 ret = 1;
966no_delegation_unlock:
967 spin_unlock(&deleg_cur->lock);
968no_delegation:
969 rcu_read_unlock();
970
971 if (!ret && open_stateid != NULL) {
dc0b027d 972 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 973 ret = 1;
974 }
975
976 return ret;
977}
978
979
dc0b027d 980static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 981{
982 struct nfs_delegation *delegation;
983
984 rcu_read_lock();
985 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 986 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 987 rcu_read_unlock();
988 return;
989 }
990 rcu_read_unlock();
991 nfs_inode_return_delegation(inode);
992}
993
6ee41268 994static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 995{
996 struct nfs4_state *state = opendata->state;
997 struct nfs_inode *nfsi = NFS_I(state->inode);
998 struct nfs_delegation *delegation;
dc0b027d
TM		 999 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1000 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1001 nfs4_stateid stateid;
1002 int ret = -EAGAIN;
1003
aac00a8d 1004 for (;;) {
dc0b027d 1005 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1006 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1007 if (can_open_cached(state, fmode, open_mode)) {
1008 update_open_stateflags(state, fmode);
6ee41268 1009 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1010 goto out_return_state;
1011 }
1012 spin_unlock(&state->owner->so_lock);
1013 }
34310430
TM		 1014 rcu_read_lock();
1015 delegation = rcu_dereference(nfsi->delegation);
1016 if (delegation == NULL ||
dc0b027d 1017 !can_open_delegated(delegation, fmode)) {
34310430 1018 rcu_read_unlock();
aac00a8d 1019 break;
34310430 1020 }
aac00a8d
TM		 1021 /* Save the delegation */
1022 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1023 rcu_read_unlock();
af22f94a 1024 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1025 if (ret != 0)
1026 goto out;
1027 ret = -EAGAIN;
34310430
TM		 1028
1029 /* Try to update the stateid using the delegation */
dc0b027d 1030 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1031 goto out_return_state;
aac00a8d 1032 }
aac00a8d
TM		 1033out:
1034 return ERR_PTR(ret);
1035out_return_state:
1036 atomic_inc(&state->count);
1037 return state;
1038}
1039
24ac23ab
TM		 1040static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1041{
1042 struct inode *inode;
1043 struct nfs4_state *state = NULL;
003707c7 1044 struct nfs_delegation *delegation;
1b370bc2 1045 int ret;
24ac23ab 1046
aac00a8d 1047 if (!data->rpc_done) {
6ee41268 1048 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1049 goto out;
1050 }
1051
1b370bc2 1052 ret = -EAGAIN;
24ac23ab 1053 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1054 goto err;
24ac23ab 1055 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1056 ret = PTR_ERR(inode);
03f28e3a 1057 if (IS_ERR(inode))
1b370bc2
TM		 1058 goto err;
1059 ret = -ENOMEM;
24ac23ab
TM		 1060 state = nfs4_get_open_state(inode, data->owner);
1061 if (state == NULL)
1b370bc2 1062 goto err_put_inode;
549d6ed5 1063 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1064 int delegation_flags = 0;
1065
003707c7
TM		 1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
1068 if (delegation)
1069 delegation_flags = delegation->flags;
1070 rcu_read_unlock();
15c831bf 1071 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1072 nfs_inode_set_delegation(state->inode,
1073 data->owner->so_cred,
1074 &data->o_res);
1075 else
1076 nfs_inode_reclaim_delegation(state->inode,
1077 data->owner->so_cred,
1078 &data->o_res);
1079 }
34310430
TM		 1080
1081 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1082 data->o_arg.fmode);
24ac23ab 1083 iput(inode);
aac00a8d 1084out:
24ac23ab 1085 return state;
1b370bc2
TM		 1086err_put_inode:
1087 iput(inode);
1088err:
1089 return ERR_PTR(ret);
24ac23ab
TM		 1090}
1091
864472e9
TM		 1092static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1093{
1094 struct nfs_inode *nfsi = NFS_I(state->inode);
1095 struct nfs_open_context *ctx;
1096
1097 spin_lock(&state->inode->i_lock);
1098 list_for_each_entry(ctx, &nfsi->open_files, list) {
1099 if (ctx->state != state)
1100 continue;
1101 get_nfs_open_context(ctx);
1102 spin_unlock(&state->inode->i_lock);
1103 return ctx;
1104 }
1105 spin_unlock(&state->inode->i_lock);
1106 return ERR_PTR(-ENOENT);
1107}
1108
6f220ed5
TM		 1109static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1110{
1111 struct nfs4_opendata *opendata;
1112
8535b2be 1113 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1114 if (opendata == NULL)
1115 return ERR_PTR(-ENOMEM);
1116 opendata->state = state;
1117 atomic_inc(&state->count);
1118 return opendata;
1119}
1120
dc0b027d 1121static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1122{
2ced46c2 1123 struct nfs4_state *newstate;
864472e9
TM		 1124 int ret;
1125
dc0b027d
TM		 1126 opendata->o_arg.open_flags = 0;
1127 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1128 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1129 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1130 nfs4_init_opendata_res(opendata);
b257957e 1131 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1132 if (ret != 0)
1133 return ret;
2ced46c2 1134 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1135 if (IS_ERR(newstate))
1136 return PTR_ERR(newstate);
dc0b027d 1137 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1138 *res = newstate;
864472e9
TM		 1139 return 0;
1140}
1141
1142static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1143{
864472e9 1144 struct nfs4_state *newstate;
864472e9
TM		 1145 int ret;
1146
1147 /* memory barrier prior to reading state->n_* */
2ced46c2 1148 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1149 smp_rmb();
1150 if (state->n_rdwr != 0) {
b0ed9dbc 1151 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1152 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1153 if (ret != 0)
1154 return ret;
2ced46c2
TM		 1155 if (newstate != state)
1156 return -ESTALE;
864472e9
TM		 1157 }
1158 if (state->n_wronly != 0) {
b0ed9dbc 1159 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1160 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1161 if (ret != 0)
1162 return ret;
2ced46c2
TM		 1163 if (newstate != state)
1164 return -ESTALE;
864472e9
TM		 1165 }
1166 if (state->n_rdonly != 0) {
b0ed9dbc 1167 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1168 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1169 if (ret != 0)
1170 return ret;
2ced46c2
TM		 1171 if (newstate != state)
1172 return -ESTALE;
864472e9 1173 }
1ac7e2fd
TM		 1174 /*
1175 * We may have performed cached opens for all three recoveries.
1176 * Check if we need to update the current stateid.
1177 */
1178 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1179 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1180 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1181 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1182 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1183 write_sequnlock(&state->seqlock);
1ac7e2fd 1184 }
864472e9
TM		 1185 return 0;
1186}
1187
1da177e4
LT		 1188/*
1189 * OPEN_RECLAIM:
1190 * reclaim state on the server after a reboot.
1da177e4 1191 */
539cd03a 1192static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1193{
1ac7e2fd 1194 struct nfs_delegation *delegation;
864472e9 1195 struct nfs4_opendata *opendata;
dc0b027d 1196 fmode_t delegation_type = 0;
1da177e4
LT		 1197 int status;
1198
6f220ed5
TM		 1199 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1200 if (IS_ERR(opendata))
1201 return PTR_ERR(opendata);
864472e9
TM		 1202 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1203 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1204 rcu_read_lock();
1205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1206 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1207 delegation_type = delegation->type;
1ac7e2fd 1208 rcu_read_unlock();
864472e9
TM		 1209 opendata->o_arg.u.delegation_type = delegation_type;
1210 status = nfs4_open_recover(opendata, state);
c6d00e63 1211 nfs4_opendata_put(opendata);
1da177e4
LT		 1212 return status;
1213}
1214
539cd03a 1215static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1216{
1217 struct nfs_server *server = NFS_SERVER(state->inode);
1218 struct nfs4_exception exception = { };
1219 int err;
1220 do {
539cd03a 1221 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1222 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1223 break;
1224 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1225 } while (exception.retry);
1226 return err;
1227}
1228
864472e9
TM		 1229static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1230{
1231 struct nfs_open_context *ctx;
1232 int ret;
1233
1234 ctx = nfs4_state_find_open_context(state);
1235 if (IS_ERR(ctx))
1236 return PTR_ERR(ctx);
539cd03a 1237 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1238 put_nfs_open_context(ctx);
1239 return ret;
1240}
1241
13437e12 1242static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1243{
e56e0b78 1244 struct nfs4_opendata *opendata;
864472e9 1245 int ret;
1da177e4 1246
6f220ed5
TM		 1247 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1248 if (IS_ERR(opendata))
1249 return PTR_ERR(opendata);
e56e0b78 1250 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1251 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1252 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1253 ret = nfs4_open_recover(opendata, state);
c6d00e63 1254 nfs4_opendata_put(opendata);
864472e9 1255 return ret;
1da177e4
LT		 1256}
1257
13437e12 1258int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1259{
1260 struct nfs4_exception exception = { };
539cd03a 1261 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1262 int err;
1263 do {
13437e12 1264 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1265 switch (err) {
1266 case 0:
965b5d67
TM		 1267 case -ENOENT:
1268 case -ESTALE:
1269 goto out;
bcfa49f6
RL		 1270 case -NFS4ERR_BADSESSION:
1271 case -NFS4ERR_BADSLOT:
1272 case -NFS4ERR_BAD_HIGH_SLOT:
1273 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1274 case -NFS4ERR_DEADSESSION:
0400a6b0 1275 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1276 goto out;
1da177e4
LT		 1277 case -NFS4ERR_STALE_CLIENTID:
1278 case -NFS4ERR_STALE_STATEID:
1279 case -NFS4ERR_EXPIRED:
1280 /* Don't recall a delegation if it was lost */
0400a6b0 1281 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1282 goto out;
1283 case -ERESTARTSYS:
1284 /*
1285 * The show must go on: exit, but mark the
1286 * stateid as needing recovery.
1287 */
1288 case -NFS4ERR_ADMIN_REVOKED:
1289 case -NFS4ERR_BAD_STATEID:
0400a6b0 1290 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1291 case -EKEYEXPIRED:
1292 /*
1293 * User RPCSEC_GSS context has expired.
1294 * We cannot recover this stateid now, so
1295 * skip it and allow recovery thread to
1296 * proceed.
1297 */
965b5d67
TM		 1298 case -ENOMEM:
1299 err = 0;
1300 goto out;
1da177e4
LT		 1301 }
1302 err = nfs4_handle_exception(server, err, &exception);
1303 } while (exception.retry);
965b5d67 1304out:
1da177e4
LT		 1305 return err;
1306}
1307
cdd4e68b
TM		 1308static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1309{
1310 struct nfs4_opendata *data = calldata;
1311
1312 data->rpc_status = task->tk_status;
26e976a8 1313 if (data->rpc_status == 0) {
cdd4e68b
TM		 1314 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1315 sizeof(data->o_res.stateid.data));
bb22629e 1316 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1317 renew_lease(data->o_res.server, data->timestamp);
3e309914 1318 data->rpc_done = 1;
26e976a8 1319 }
cdd4e68b
TM		 1320}
1321
1322static void nfs4_open_confirm_release(void *calldata)
1323{
1324 struct nfs4_opendata *data = calldata;
1325 struct nfs4_state *state = NULL;
1326
1327 /* If this request hasn't been cancelled, do nothing */
1328 if (data->cancelled == 0)
1329 goto out_free;
1330 /* In case of error, no cleanup! */
3e309914 1331 if (!data->rpc_done)
cdd4e68b 1332 goto out_free;
cdd4e68b 1333 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1334 if (!IS_ERR(state))
dc0b027d 1335 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1336out_free:
c6d00e63 1337 nfs4_opendata_put(data);
cdd4e68b
TM		 1338}
1339
1340static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1341 .rpc_call_done = nfs4_open_confirm_done,
1342 .rpc_release = nfs4_open_confirm_release,
1343};
1344
1345/*
1346 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1347 */
1348static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1349{
1350 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1351 struct rpc_task *task;
5138fde0
TM		 1352 struct rpc_message msg = {
1353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1354 .rpc_argp = &data->c_arg,
1355 .rpc_resp = &data->c_res,
1356 .rpc_cred = data->owner->so_cred,
1357 };
c970aa85
TM		 1358 struct rpc_task_setup task_setup_data = {
1359 .rpc_client = server->client,
5138fde0 1360 .rpc_message = &msg,
c970aa85
TM		 1361 .callback_ops = &nfs4_open_confirm_ops,
1362 .callback_data = data,
101070ca 1363 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1364 .flags = RPC_TASK_ASYNC,
1365 };
1da177e4
LT		 1366 int status;
1367
c6d00e63 1368 kref_get(&data->kref);
3e309914
TM		 1369 data->rpc_done = 0;
1370 data->rpc_status = 0;
5138fde0 1371 data->timestamp = jiffies;
c970aa85 1372 task = rpc_run_task(&task_setup_data);
7a1218a2 1373 if (IS_ERR(task))
cdd4e68b 1374 return PTR_ERR(task);
cdd4e68b
TM		 1375 status = nfs4_wait_for_completion_rpc_task(task);
1376 if (status != 0) {
1377 data->cancelled = 1;
1378 smp_wmb();
1379 } else
1380 status = data->rpc_status;
e6b3c4db 1381 rpc_put_task(task);
1da177e4
LT		 1382 return status;
1383}
1384
24ac23ab 1385static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1386{
24ac23ab
TM		 1387 struct nfs4_opendata *data = calldata;
1388 struct nfs4_state_owner *sp = data->owner;
5138fde0 1389
24ac23ab
TM		 1390 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1391 return;
aac00a8d
TM		 1392 /*
1393 * Check if we still need to send an OPEN call, or if we can use
1394 * a delegation instead.
1395 */
1396 if (data->state != NULL) {
1397 struct nfs_delegation *delegation;
1398
dc0b027d 1399 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1400 goto out_no_action;
aac00a8d
TM		 1401 rcu_read_lock();
1402 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1403 if (delegation != NULL &&
15c831bf 1404 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1405 rcu_read_unlock();
6ee41268 1406 goto out_no_action;
aac00a8d
TM		 1407 }
1408 rcu_read_unlock();
1409 }
24ac23ab 1410 /* Update sequence id. */
9f958ab8 1411 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1412 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1413 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1414 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1415 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1416 }
26e976a8 1417 data->timestamp = jiffies;
035168ab 1418 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1419 &data->o_arg.seq_args,
1420 &data->o_res.seq_res, 1, task))
1421 return;
5138fde0 1422 rpc_call_start(task);
6ee41268
TM		 1423 return;
1424out_no_action:
1425 task->tk_action = NULL;
1426
24ac23ab 1427}
1da177e4 1428
b257957e
AB		 1429static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1430{
1431 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1432 nfs4_open_prepare(task, calldata);
1433}
1434
24ac23ab
TM		 1435static void nfs4_open_done(struct rpc_task *task, void *calldata)
1436{
1437 struct nfs4_opendata *data = calldata;
1da177e4 1438
24ac23ab 1439 data->rpc_status = task->tk_status;
d898528c 1440
14516c3a
TM		 1441 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1442 return;
d898528c 1443
24ac23ab
TM		 1444 if (task->tk_status == 0) {
1445 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1446 case S_IFREG:
1447 break;
1448 case S_IFLNK:
24ac23ab 1449 data->rpc_status = -ELOOP;
6f926b5b
TM		 1450 break;
1451 case S_IFDIR:
24ac23ab 1452 data->rpc_status = -EISDIR;
6f926b5b
TM		 1453 break;
1454 default:
24ac23ab 1455 data->rpc_status = -ENOTDIR;
6f926b5b 1456 }
26e976a8 1457 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1458 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1459 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1460 }
3e309914 1461 data->rpc_done = 1;
24ac23ab 1462}
6f926b5b 1463
24ac23ab
TM		 1464static void nfs4_open_release(void *calldata)
1465{
1466 struct nfs4_opendata *data = calldata;
1467 struct nfs4_state *state = NULL;
1468
1469 /* If this request hasn't been cancelled, do nothing */
1470 if (data->cancelled == 0)
1471 goto out_free;
1472 /* In case of error, no cleanup! */
3e309914 1473 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1474 goto out_free;
1475 /* In case we need an open_confirm, no cleanup! */
1476 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1477 goto out_free;
24ac23ab 1478 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1479 if (!IS_ERR(state))
dc0b027d 1480 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1481out_free:
c6d00e63 1482 nfs4_opendata_put(data);
24ac23ab
TM		 1483}
1484
1485static const struct rpc_call_ops nfs4_open_ops = {
1486 .rpc_call_prepare = nfs4_open_prepare,
1487 .rpc_call_done = nfs4_open_done,
1488 .rpc_release = nfs4_open_release,
1489};
1490
b257957e
AB		 1491static const struct rpc_call_ops nfs4_recover_open_ops = {
1492 .rpc_call_prepare = nfs4_recover_open_prepare,
1493 .rpc_call_done = nfs4_open_done,
1494 .rpc_release = nfs4_open_release,
1495};
1496
1497static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1498{
1499 struct inode *dir = data->dir->d_inode;
1500 struct nfs_server *server = NFS_SERVER(dir);
1501 struct nfs_openargs *o_arg = &data->o_arg;
1502 struct nfs_openres *o_res = &data->o_res;
1503 struct rpc_task *task;
5138fde0
TM		 1504 struct rpc_message msg = {
1505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1506 .rpc_argp = o_arg,
1507 .rpc_resp = o_res,
1508 .rpc_cred = data->owner->so_cred,
1509 };
c970aa85
TM		 1510 struct rpc_task_setup task_setup_data = {
1511 .rpc_client = server->client,
5138fde0 1512 .rpc_message = &msg,
c970aa85
TM		 1513 .callback_ops = &nfs4_open_ops,
1514 .callback_data = data,
101070ca 1515 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1516 .flags = RPC_TASK_ASYNC,
1517 };
24ac23ab
TM		 1518 int status;
1519
c6d00e63 1520 kref_get(&data->kref);
3e309914
TM		 1521 data->rpc_done = 0;
1522 data->rpc_status = 0;
2ced46c2 1523 data->cancelled = 0;
b257957e
AB		 1524 if (isrecover)
1525 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1526 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1527 if (IS_ERR(task))
1528 return PTR_ERR(task);
1529 status = nfs4_wait_for_completion_rpc_task(task);
1530 if (status != 0) {
1531 data->cancelled = 1;
1532 smp_wmb();
1533 } else
1534 status = data->rpc_status;
1535 rpc_put_task(task);
1536
1537 return status;
1538}
1539
1540static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1541{
1542 struct inode *dir = data->dir->d_inode;
1543 struct nfs_openres *o_res = &data->o_res;
1544 int status;
1545
1546 status = nfs4_run_open_task(data, 1);
1547 if (status != 0 || !data->rpc_done)
1548 return status;
1549
1550 nfs_refresh_inode(dir, o_res->dir_attr);
1551
1552 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1553 status = _nfs4_proc_open_confirm(data);
1554 if (status != 0)
1555 return status;
1556 }
1557
1558 return status;
1559}
1560
1561/*
1562 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1563 */
1564static int _nfs4_proc_open(struct nfs4_opendata *data)
1565{
1566 struct inode *dir = data->dir->d_inode;
1567 struct nfs_server *server = NFS_SERVER(dir);
1568 struct nfs_openargs *o_arg = &data->o_arg;
1569 struct nfs_openres *o_res = &data->o_res;
1570 int status;
1571
1572 status = nfs4_run_open_task(data, 0);
3e309914 1573 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1574 return status;
1575
56ae19f3
TM		 1576 if (o_arg->open_flags & O_CREAT) {
1577 update_changeattr(dir, &o_res->cinfo);
1578 nfs_post_op_update_inode(dir, o_res->dir_attr);
1579 } else
1580 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1581 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1582 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1583 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1584 status = _nfs4_proc_open_confirm(data);
1da177e4 1585 if (status != 0)
24ac23ab 1586 return status;
1da177e4
LT		 1587 }
1588 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1589 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1590 return 0;
1da177e4
LT		 1591}
1592
d83217c1 1593static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1594{
a78cb57a 1595 unsigned int loop;
6b30954e 1596 int ret;
58d9714a 1597
a78cb57a 1598 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1599 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1600 if (ret != 0)
a78cb57a 1601 break;
e598d843
TM		 1602 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1603 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1604 break;
0400a6b0 1605 nfs4_schedule_state_manager(clp);
a78cb57a 1606 ret = -EIO;
6b30954e 1607 }
a78cb57a 1608 return ret;
58d9714a
TM		 1609}
1610
d83217c1
AA		 1611static int nfs4_recover_expired_lease(struct nfs_server *server)
1612{
1613 return nfs4_client_recover_expired_lease(server->nfs_client);
1614}
1615
1da177e4
LT		 1616/*
1617 * OPEN_EXPIRED:
1618 * reclaim state on the server after a network partition.
1619 * Assumes caller holds the appropriate lock
1620 */
539cd03a 1621static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1622{
e56e0b78 1623 struct nfs4_opendata *opendata;
864472e9 1624 int ret;
1da177e4 1625
6f220ed5
TM		 1626 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1627 if (IS_ERR(opendata))
1628 return PTR_ERR(opendata);
864472e9 1629 ret = nfs4_open_recover(opendata, state);
35d05778 1630 if (ret == -ESTALE)
539cd03a 1631 d_drop(ctx->path.dentry);
c6d00e63 1632 nfs4_opendata_put(opendata);
864472e9 1633 return ret;
1da177e4
LT		 1634}
1635
a9ed2e25 1636static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1637{
539cd03a 1638 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1639 struct nfs4_exception exception = { };
1640 int err;
1641
1642 do {
539cd03a 1643 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1644 switch (err) {
1645 default:
1646 goto out;
1647 case -NFS4ERR_GRACE:
1648 case -NFS4ERR_DELAY:
1649 nfs4_handle_exception(server, err, &exception);
1650 err = 0;
1651 }
202b50dc 1652 } while (exception.retry);
a9ed2e25 1653out:
202b50dc
TM		 1654 return err;
1655}
1656
1da177e4
LT		 1657static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1658{
1da177e4 1659 struct nfs_open_context *ctx;
864472e9 1660 int ret;
1da177e4 1661
864472e9
TM		 1662 ctx = nfs4_state_find_open_context(state);
1663 if (IS_ERR(ctx))
1664 return PTR_ERR(ctx);
539cd03a 1665 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1666 put_nfs_open_context(ctx);
1667 return ret;
1da177e4
LT		 1668}
1669
aa53ed54
JL		 1670/*
1671 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1672 * fields corresponding to attributes that were used to store the verifier.
1673 * Make sure we clobber those fields in the later setattr call
1674 */
1675static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1676{
1677 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1678 !(sattr->ia_valid & ATTR_ATIME_SET))
1679 sattr->ia_valid |= ATTR_ATIME;
1680
1681 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1682 !(sattr->ia_valid & ATTR_MTIME_SET))
1683 sattr->ia_valid |= ATTR_MTIME;
1684}
1685
1da177e4 1686/*
24ac23ab 1687 * Returns a referenced nfs4_state
1da177e4 1688 */
dc0b027d 1689static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1690{
1691 struct nfs4_state_owner *sp;
1692 struct nfs4_state *state = NULL;
1693 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1694 struct nfs4_opendata *opendata;
aac00a8d 1695 int status;
1da177e4
LT		 1696
1697 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1698 status = -ENOMEM;
1699 if (!(sp = nfs4_get_state_owner(server, cred))) {
1700 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1701 goto out_err;
1702 }
58d9714a
TM		 1703 status = nfs4_recover_expired_lease(server);
1704 if (status != 0)
b4454fe1 1705 goto err_put_state_owner;
aac00a8d 1706 if (path->dentry->d_inode != NULL)
dc0b027d 1707 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1708 status = -ENOMEM;
8535b2be 1709 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1710 if (opendata == NULL)
95d35cb4 1711 goto err_put_state_owner;
1da177e4 1712
aac00a8d
TM		 1713 if (path->dentry->d_inode != NULL)
1714 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1715
24ac23ab 1716 status = _nfs4_proc_open(opendata);
1da177e4 1717 if (status != 0)
c6d00e63 1718 goto err_opendata_put;
1da177e4 1719
24ac23ab 1720 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1721 status = PTR_ERR(state);
1722 if (IS_ERR(state))
c6d00e63 1723 goto err_opendata_put;
0df5dd4a 1724 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1725 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1726
1727 if (opendata->o_arg.open_flags & O_EXCL) {
1728 nfs4_exclusive_attrset(opendata, sattr);
1729
1730 nfs_fattr_init(opendata->o_res.f_attr);
1731 status = nfs4_do_setattr(state->inode, cred,
1732 opendata->o_res.f_attr, sattr,
1733 state);
1734 if (status == 0)
1735 nfs_setattr_update_inode(state->inode, sattr);
1736 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1737 }
c6d00e63 1738 nfs4_opendata_put(opendata);
1da177e4 1739 nfs4_put_state_owner(sp);
1da177e4
LT		 1740 *res = state;
1741 return 0;
c6d00e63
TM		 1742err_opendata_put:
1743 nfs4_opendata_put(opendata);
e56e0b78
TM		 1744err_put_state_owner:
1745 nfs4_put_state_owner(sp);
1da177e4 1746out_err:
1da177e4
LT		 1747 *res = NULL;
1748 return status;
1749}
1750
1751
dc0b027d 1752static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1753{
1754 struct nfs4_exception exception = { };
1755 struct nfs4_state *res;
1756 int status;
1757
1758 do {
dc0b027d 1759 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1760 if (status == 0)
1761 break;
1762 /* NOTE: BAD_SEQID means the server and client disagree about the
1763 * book-keeping w.r.t. state-changing operations
1764 * (OPEN/CLOSE/LOCK/LOCKU...)
1765 * It is actually a sign of a bug on the client or on the server.
1766 *
1767 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1768 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1769 * have unhashed the old state_owner for us, and that we can
1770 * therefore safely retry using a new one. We should still warn
1771 * the user though...
1772 */
1773 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1774 printk(KERN_WARNING "NFS: v4 server %s "
1775 " returned a bad sequence-id error!\n",
1776 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1777 exception.retry = 1;
1778 continue;
1779 }
550f5747
TM		 1780 /*
1781 * BAD_STATEID on OPEN means that the server cancelled our
1782 * state before it received the OPEN_CONFIRM.
1783 * Recover by retrying the request as per the discussion
1784 * on Page 181 of RFC3530.
1785 */
1786 if (status == -NFS4ERR_BAD_STATEID) {
1787 exception.retry = 1;
1788 continue;
1789 }
aac00a8d
TM		 1790 if (status == -EAGAIN) {
1791 /* We must have found a delegation */
1792 exception.retry = 1;
1793 continue;
1794 }
1da177e4
LT		 1795 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1796 status, &exception));
1797 } while (exception.retry);
1798 return res;
1799}
1800
659bfcd6
TM		 1801static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1802 struct nfs_fattr *fattr, struct iattr *sattr,
1803 struct nfs4_state *state)
1da177e4 1804{
3e4f6290 1805 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1806 struct nfs_setattrargs arg = {
3e4f6290 1807 .fh = NFS_FH(inode),
1da177e4
LT		 1808 .iap = sattr,
1809 .server = server,
1810 .bitmask = server->attr_bitmask,
1811 };
1812 struct nfs_setattrres res = {
1813 .fattr = fattr,
1814 .server = server,
1815 };
1816 struct rpc_message msg = {
659bfcd6
TM		 1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1818 .rpc_argp = &arg,
1819 .rpc_resp = &res,
1820 .rpc_cred = cred,
1da177e4 1821 };
26e976a8 1822 unsigned long timestamp = jiffies;
65e4308d 1823 int status;
1da177e4 1824
0e574af1 1825 nfs_fattr_init(fattr);
1da177e4 1826
3e4f6290
TM		 1827 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1828 /* Use that stateid */
1829 } else if (state != NULL) {
77041ed9 1830 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1831 } else
1da177e4
LT		 1832 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1833
cccef3b9 1834 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1835 if (status == 0 && state != NULL)
1836 renew_lease(server, timestamp);
65e4308d 1837 return status;
1da177e4
LT		 1838}
1839
659bfcd6
TM		 1840static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1841 struct nfs_fattr *fattr, struct iattr *sattr,
1842 struct nfs4_state *state)
1da177e4 1843{
3e4f6290 1844 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1845 struct nfs4_exception exception = { };
1846 int err;
1847 do {
1848 err = nfs4_handle_exception(server,
659bfcd6 1849 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1850 &exception);
1851 } while (exception.retry);
1852 return err;
1853}
1854
1855struct nfs4_closedata {
4a35bd41 1856 struct path path;
1da177e4
LT		 1857 struct inode *inode;
1858 struct nfs4_state *state;
1859 struct nfs_closeargs arg;
1860 struct nfs_closeres res;
516a6af6 1861 struct nfs_fattr fattr;
26e976a8 1862 unsigned long timestamp;
f7e8917a
FI		 1863 bool roc;
1864 u32 roc_barrier;
1da177e4
LT		 1865};
1866
963d8fe5 1867static void nfs4_free_closedata(void *data)
9512135d 1868{
963d8fe5
TM		 1869 struct nfs4_closedata *calldata = data;
1870 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1871
f7e8917a
FI		 1872 if (calldata->roc)
1873 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1874 nfs4_put_open_state(calldata->state);
1875 nfs_free_seqid(calldata->arg.seqid);
9512135d 1876 nfs4_put_state_owner(sp);
31f31db1 1877 path_put(&calldata->path);
9512135d
TM		 1878 kfree(calldata);
1879}
1880
88069f77
TM		 1881static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1882 fmode_t fmode)
1883{
1884 spin_lock(&state->owner->so_lock);
1885 if (!(fmode & FMODE_READ))
1886 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1887 if (!(fmode & FMODE_WRITE))
1888 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1889 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1890 spin_unlock(&state->owner->so_lock);
1891}
1892
963d8fe5 1893static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1894{
963d8fe5 1895 struct nfs4_closedata *calldata = data;
1da177e4 1896 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1897 struct nfs_server *server = NFS_SERVER(calldata->inode);
1898
14516c3a
TM		 1899 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1900 return;
1da177e4
LT		 1901 /* hmm. we are done with the inode, and in the process of freeing
1902 * the state_owner. we keep this around to process errors
1903 */
1da177e4
LT		 1904 switch (task->tk_status) {
1905 case 0:
f7e8917a
FI		 1906 if (calldata->roc)
1907 pnfs_roc_set_barrier(state->inode,
1908 calldata->roc_barrier);
45328c35 1909 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1910 renew_lease(server, calldata->timestamp);
88069f77
TM		 1911 nfs4_close_clear_stateid_flags(state,
1912 calldata->arg.fmode);
1da177e4
LT		 1913 break;
1914 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1915 case -NFS4ERR_OLD_STATEID:
1916 case -NFS4ERR_BAD_STATEID:
1da177e4 1917 case -NFS4ERR_EXPIRED:
dc0b027d 1918 if (calldata->arg.fmode == 0)
9e33bed5 1919 break;
1da177e4 1920 default:
72211dbe
TM		 1921 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1922 rpc_restart_call_prepare(task);
1da177e4 1923 }
72211dbe 1924 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1925 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1926}
1927
4ce70ada 1928static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1929{
4ce70ada 1930 struct nfs4_closedata *calldata = data;
9512135d 1931 struct nfs4_state *state = calldata->state;
88069f77 1932 int call_close = 0;
9512135d 1933
963d8fe5 1934 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1935 return;
003707c7 1936
88069f77
TM		 1937 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1938 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1939 spin_lock(&state->owner->so_lock);
003707c7 1940 /* Calculate the change in open mode */
e7616923 1941 if (state->n_rdwr == 0) {
003707c7 1942 if (state->n_rdonly == 0) {
88069f77
TM		 1943 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1944 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1945 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1946 }
1947 if (state->n_wronly == 0) {
88069f77
TM		 1948 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1949 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1950 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1951 }
e7616923 1952 }
4cecb76f 1953 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1954
1955 if (!call_close) {
963d8fe5
TM		 1956 /* Note: exit _without_ calling nfs4_close_done */
1957 task->tk_action = NULL;
9512135d
TM		 1958 return;
1959 }
88069f77 1960
f7e8917a 1961 if (calldata->arg.fmode == 0) {
88069f77 1962 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1963 if (calldata->roc &&
1964 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1965 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1966 task, NULL);
1967 return;
1968 }
1969 }
88069f77 1970
516a6af6 1971 nfs_fattr_init(calldata->res.fattr);
26e976a8 1972 calldata->timestamp = jiffies;
035168ab 1973 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1974 &calldata->arg.seq_args, &calldata->res.seq_res,
1975 1, task))
1976 return;
5138fde0 1977 rpc_call_start(task);
1da177e4
LT		 1978}
1979
963d8fe5 1980static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1981 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1982 .rpc_call_done = nfs4_close_done,
1983 .rpc_release = nfs4_free_closedata,
1984};
1985
1da177e4
LT		 1986/*
1987 * It is possible for data to be read/written from a mem-mapped file
1988 * after the sys_close call (which hits the vfs layer as a flush).
1989 * This means that we can't safely call nfsv4 close on a file until
1990 * the inode is cleared. This in turn means that we are not good
1991 * NFSv4 citizens - we do not indicate to the server to update the file's
1992 * share state even when we are done with one of the three share
1993 * stateid's in the inode.
1994 *
1995 * NOTE: Caller must be holding the sp->so_owner semaphore!
1996 */
f7e8917a 1997int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 1998{
4a35bd41 1999 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2000 struct nfs4_closedata *calldata;
b39e625b
TM		 2001 struct nfs4_state_owner *sp = state->owner;
2002 struct rpc_task *task;
5138fde0
TM		 2003 struct rpc_message msg = {
2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2005 .rpc_cred = state->owner->so_cred,
2006 };
c970aa85
TM		 2007 struct rpc_task_setup task_setup_data = {
2008 .rpc_client = server->client,
5138fde0 2009 .rpc_message = &msg,
c970aa85 2010 .callback_ops = &nfs4_close_ops,
101070ca 2011 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2012 .flags = RPC_TASK_ASYNC,
2013 };
9512135d 2014 int status = -ENOMEM;
1da177e4 2015
8535b2be 2016 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2017 if (calldata == NULL)
9512135d 2018 goto out;
4a35bd41 2019 calldata->inode = state->inode;
1da177e4 2020 calldata->state = state;
4a35bd41 2021 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2022 calldata->arg.stateid = &state->open_stateid;
1da177e4 2023 /* Serialization for the sequence id */
8535b2be 2024 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2025 if (calldata->arg.seqid == NULL)
2026 goto out_free_calldata;
dc0b027d 2027 calldata->arg.fmode = 0;
a65318bf 2028 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2029 calldata->res.fattr = &calldata->fattr;
c1d51931 2030 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2031 calldata->res.server = server;
f7e8917a 2032 calldata->roc = roc;
f6948697
AV		 2033 path_get(path);
2034 calldata->path = *path;
9512135d 2035
1174dd1f
TM		 2036 msg.rpc_argp = &calldata->arg;
2037 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2038 task_setup_data.callback_data = calldata;
2039 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2040 if (IS_ERR(task))
2041 return PTR_ERR(task);
a49c3c77
TM		 2042 status = 0;
2043 if (wait)
2044 status = rpc_wait_for_completion_task(task);
b39e625b 2045 rpc_put_task(task);
a49c3c77 2046 return status;
9512135d
TM		 2047out_free_calldata:
2048 kfree(calldata);
2049out:
f7e8917a
FI		 2050 if (roc)
2051 pnfs_roc_release(state->inode);
b39e625b
TM		 2052 nfs4_put_open_state(state);
2053 nfs4_put_state_owner(sp);
9512135d 2054 return status;
1da177e4
LT		 2055}
2056
2b484297 2057static struct inode *
cd9a1c0e 2058nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2059{
1da177e4 2060 struct nfs4_state *state;
1da177e4 2061
565277f6 2062 /* Protect against concurrent sillydeletes */
cd9a1c0e 2063 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2064 if (IS_ERR(state))
2065 return ERR_CAST(state);
cd9a1c0e 2066 ctx->state = state;
f46e0bd3 2067 return igrab(state->inode);
1da177e4
LT		 2068}
2069
1185a552 2070static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2071{
2072 if (ctx->state == NULL)
2073 return;
2074 if (is_sync)
2075 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2076 else
2077 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2078}
1da177e4
LT		 2079
2080static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2081{
43652ad5
BH		 2082 struct nfs4_server_caps_arg args = {
2083 .fhandle = fhandle,
2084 };
1da177e4
LT		 2085 struct nfs4_server_caps_res res = {};
2086 struct rpc_message msg = {
2087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2088 .rpc_argp = &args,
1da177e4
LT		 2089 .rpc_resp = &res,
2090 };
2091 int status;
2092
cccef3b9 2093 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2094 if (status == 0) {
2095 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2096 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2097 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2098 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2099 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2100 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2101 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2102 server->caps |= NFS_CAP_ACLS;
2103 if (res.has_links != 0)
2104 server->caps |= NFS_CAP_HARDLINKS;
2105 if (res.has_symlinks != 0)
2106 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2107 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2108 server->caps |= NFS_CAP_FILEID;
2109 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2110 server->caps |= NFS_CAP_MODE;
2111 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2112 server->caps |= NFS_CAP_NLINK;
2113 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2114 server->caps |= NFS_CAP_OWNER;
2115 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2116 server->caps |= NFS_CAP_OWNER_GROUP;
2117 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2118 server->caps |= NFS_CAP_ATIME;
2119 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2120 server->caps |= NFS_CAP_CTIME;
2121 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2122 server->caps |= NFS_CAP_MTIME;
2123
a65318bf
TM		 2124 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2125 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2126 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2127 server->acl_bitmask = res.acl_bitmask;
2128 }
cccef3b9 2129
1da177e4
LT		 2130 return status;
2131}
2132
55a97593 2133int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2134{
2135 struct nfs4_exception exception = { };
2136 int err;
2137 do {
2138 err = nfs4_handle_exception(server,
2139 _nfs4_server_capabilities(server, fhandle),
2140 &exception);
2141 } while (exception.retry);
2142 return err;
2143}
2144
2145static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2146 struct nfs_fsinfo *info)
2147{
1da177e4
LT		 2148 struct nfs4_lookup_root_arg args = {
2149 .bitmask = nfs4_fattr_bitmap,
2150 };
2151 struct nfs4_lookup_res res = {
2152 .server = server,
0e574af1 2153 .fattr = info->fattr,
1da177e4
LT		 2154 .fh = fhandle,
2155 };
2156 struct rpc_message msg = {
2157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2158 .rpc_argp = &args,
2159 .rpc_resp = &res,
2160 };
008f55d0 2161
0e574af1 2162 nfs_fattr_init(info->fattr);
fccba804 2163 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2164}
2165
2166static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2167 struct nfs_fsinfo *info)
2168{
2169 struct nfs4_exception exception = { };
2170 int err;
2171 do {
2172 err = nfs4_handle_exception(server,
2173 _nfs4_lookup_root(server, fhandle, info),
2174 &exception);
2175 } while (exception.retry);
2176 return err;
2177}
2178
54ceac45
DH		 2179/*
2180 * get the file handle for the "/" directory on the server
2181 */
1da177e4 2182static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2183 struct nfs_fsinfo *info)
1da177e4 2184{
1da177e4
LT		 2185 int status;
2186
1da177e4 2187 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2188 if (status == 0)
2189 status = nfs4_server_capabilities(server, fhandle);
2190 if (status == 0)
2191 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2192 return nfs4_map_errors(status);
1da177e4
LT		 2193}
2194
6b97fd3d
MN		 2195/*
2196 * Get locations and (maybe) other attributes of a referral.
2197 * Note that we'll actually follow the referral later when
2198 * we detect fsid mismatch in inode revalidation
2199 */
56659e99 2200static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2201{
2202 int status = -ENOMEM;
2203 struct page *page = NULL;
2204 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2205
2206 page = alloc_page(GFP_KERNEL);
2207 if (page == NULL)
2208 goto out;
2209 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2210 if (locations == NULL)
2211 goto out;
2212
c228fd3a 2213 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2214 if (status != 0)
2215 goto out;
2216 /* Make sure server returned a different fsid for the referral */
2217 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2218 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2219 status = -EIO;
2220 goto out;
2221 }
2222
2223 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2224 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2225 if (!fattr->mode)
2226 fattr->mode = S_IFDIR;
2227 memset(fhandle, 0, sizeof(struct nfs_fh));
2228out:
2229 if (page)
2230 __free_page(page);
5d7ca35a 2231 kfree(locations);
6b97fd3d
MN		 2232 return status;
2233}
2234
1da177e4
LT		 2235static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2236{
2237 struct nfs4_getattr_arg args = {
2238 .fh = fhandle,
2239 .bitmask = server->attr_bitmask,
2240 };
2241 struct nfs4_getattr_res res = {
2242 .fattr = fattr,
2243 .server = server,
2244 };
2245 struct rpc_message msg = {
2246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2247 .rpc_argp = &args,
2248 .rpc_resp = &res,
2249 };
2250
0e574af1 2251 nfs_fattr_init(fattr);
cccef3b9 2252 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2253}
2254
2255static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2256{
2257 struct nfs4_exception exception = { };
2258 int err;
2259 do {
2260 err = nfs4_handle_exception(server,
2261 _nfs4_proc_getattr(server, fhandle, fattr),
2262 &exception);
2263 } while (exception.retry);
2264 return err;
2265}
2266
2267/*
2268 * The file is not closed if it is opened due to the a request to change
2269 * the size of the file. The open call will not be needed once the
2270 * VFS layer lookup-intents are implemented.
2271 *
2272 * Close is called when the inode is destroyed.
2273 * If we haven't opened the file for O_WRONLY, we
2274 * need to in the size_change case to obtain a stateid.
2275 *
2276 * Got race?
2277 * Because OPEN is always done by name in nfsv4, it is
2278 * possible that we opened a different file by the same
2279 * name. We can recognize this race condition, but we
2280 * can't do anything about it besides returning an error.
2281 *
2282 * This will be fixed with VFS changes (lookup-intent).
2283 */
2284static int
2285nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2286 struct iattr *sattr)
2287{
08e9eac4 2288 struct inode *inode = dentry->d_inode;
659bfcd6 2289 struct rpc_cred *cred = NULL;
d530838b 2290 struct nfs4_state *state = NULL;
1da177e4
LT		 2291 int status;
2292
0e574af1 2293 nfs_fattr_init(fattr);
1da177e4 2294
d530838b 2295 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2296 if (sattr->ia_valid & ATTR_FILE) {
2297 struct nfs_open_context *ctx;
2298
2299 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2300 if (ctx) {
2301 cred = ctx->cred;
2302 state = ctx->state;
2303 }
659bfcd6 2304 }
08e9eac4 2305
659bfcd6 2306 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2307 if (status == 0)
2308 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2309 return status;
2310}
2311
56659e99
TM		 2312static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2313 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2314 struct nfs_fattr *fattr)
2315{
2316 int status;
2317 struct nfs4_lookup_arg args = {
2318 .bitmask = server->attr_bitmask,
2319 .dir_fh = dirfh,
2320 .name = name,
2321 };
2322 struct nfs4_lookup_res res = {
2323 .server = server,
2324 .fattr = fattr,
2325 .fh = fhandle,
2326 };
2327 struct rpc_message msg = {
2328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2329 .rpc_argp = &args,
2330 .rpc_resp = &res,
2331 };
2332
2333 nfs_fattr_init(fattr);
2334
2335 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2336 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2337 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2338 return status;
2339}
2340
2341static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2342 struct qstr *name, struct nfs_fh *fhandle,
2343 struct nfs_fattr *fattr)
2344{
2345 struct nfs4_exception exception = { };
2346 int err;
2347 do {
4e56e082
TM		 2348 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2349 /* FIXME: !!!! */
2350 if (err == -NFS4ERR_MOVED) {
2351 err = -EREMOTE;
2352 break;
2353 }
2354 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2355 } while (exception.retry);
2356 return err;
2357}
2358
56659e99 2359static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2360 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2361{
4e56e082 2362 int status;
1da177e4
LT		 2363
2364 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2365 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2366 if (status == -NFS4ERR_MOVED)
2367 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2368 dprintk("NFS reply lookup: %d\n", status);
2369 return status;
2370}
2371
2372static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2373{
2374 struct nfs4_exception exception = { };
2375 int err;
2376 do {
2377 err = nfs4_handle_exception(NFS_SERVER(dir),
2378 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2379 &exception);
2380 } while (exception.retry);
2381 return err;
2382}
2383
2384static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2385{
76b32999 2386 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2387 struct nfs4_accessargs args = {
2388 .fh = NFS_FH(inode),
76b32999
TM		 2389 .bitmask = server->attr_bitmask,
2390 };
2391 struct nfs4_accessres res = {
2392 .server = server,
1da177e4 2393 };
1da177e4
LT		 2394 struct rpc_message msg = {
2395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2396 .rpc_argp = &args,
2397 .rpc_resp = &res,
2398 .rpc_cred = entry->cred,
2399 };
2400 int mode = entry->mask;
2401 int status;
2402
2403 /*
2404 * Determine which access bits we want to ask for...
2405 */
2406 if (mode & MAY_READ)
2407 args.access |= NFS4_ACCESS_READ;
2408 if (S_ISDIR(inode->i_mode)) {
2409 if (mode & MAY_WRITE)
2410 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2411 if (mode & MAY_EXEC)
2412 args.access |= NFS4_ACCESS_LOOKUP;
2413 } else {
2414 if (mode & MAY_WRITE)
2415 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2416 if (mode & MAY_EXEC)
2417 args.access |= NFS4_ACCESS_EXECUTE;
2418 }
c407d41a
TM		 2419
2420 res.fattr = nfs_alloc_fattr();
2421 if (res.fattr == NULL)
2422 return -ENOMEM;
2423
cccef3b9 2424 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2425 if (!status) {
2426 entry->mask = 0;
2427 if (res.access & NFS4_ACCESS_READ)
2428 entry->mask |= MAY_READ;
2429 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2430 entry->mask |= MAY_WRITE;
2431 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2432 entry->mask |= MAY_EXEC;
c407d41a 2433 nfs_refresh_inode(inode, res.fattr);
1da177e4 2434 }
c407d41a 2435 nfs_free_fattr(res.fattr);
1da177e4
LT		 2436 return status;
2437}
2438
2439static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2440{
2441 struct nfs4_exception exception = { };
2442 int err;
2443 do {
2444 err = nfs4_handle_exception(NFS_SERVER(inode),
2445 _nfs4_proc_access(inode, entry),
2446 &exception);
2447 } while (exception.retry);
2448 return err;
2449}
2450
2451/*
2452 * TODO: For the time being, we don't try to get any attributes
2453 * along with any of the zero-copy operations READ, READDIR,
2454 * READLINK, WRITE.
2455 *
2456 * In the case of the first three, we want to put the GETATTR
2457 * after the read-type operation -- this is because it is hard
2458 * to predict the length of a GETATTR response in v4, and thus
2459 * align the READ data correctly. This means that the GETATTR
2460 * may end up partially falling into the page cache, and we should
2461 * shift it into the 'tail' of the xdr_buf before processing.
2462 * To do this efficiently, we need to know the total length
2463 * of data received, which doesn't seem to be available outside
2464 * of the RPC layer.
2465 *
2466 * In the case of WRITE, we also want to put the GETATTR after
2467 * the operation -- in this case because we want to make sure
2468 * we get the post-operation mtime and size. This means that
2469 * we can't use xdr_encode_pages() as written: we need a variant
2470 * of it which would leave room in the 'tail' iovec.
2471 *
2472 * Both of these changes to the XDR layer would in fact be quite
2473 * minor, but I decided to leave them for a subsequent patch.
2474 */
2475static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2476 unsigned int pgbase, unsigned int pglen)
2477{
2478 struct nfs4_readlink args = {
2479 .fh = NFS_FH(inode),
2480 .pgbase = pgbase,
2481 .pglen = pglen,
2482 .pages = &page,
2483 };
f50c7000 2484 struct nfs4_readlink_res res;
1da177e4
LT		 2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2487 .rpc_argp = &args,
f50c7000 2488 .rpc_resp = &res,
1da177e4
LT		 2489 };
2490
cccef3b9 2491 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2492}
2493
2494static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2495 unsigned int pgbase, unsigned int pglen)
2496{
2497 struct nfs4_exception exception = { };
2498 int err;
2499 do {
2500 err = nfs4_handle_exception(NFS_SERVER(inode),
2501 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2502 &exception);
2503 } while (exception.retry);
2504 return err;
2505}
2506
1da177e4
LT		 2507/*
2508 * Got race?
2509 * We will need to arrange for the VFS layer to provide an atomic open.
2510 * Until then, this create/open method is prone to inefficiency and race
2511 * conditions due to the lookup, create, and open VFS calls from sys_open()
2512 * placed on the wire.
2513 *
2514 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2515 * The file will be opened again in the subsequent VFS open call
2516 * (nfs4_proc_file_open).
2517 *
2518 * The open for read will just hang around to be used by any process that
2519 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2520 */
2521
2522static int
2523nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2524 int flags, struct nfs_open_context *ctx)
1da177e4 2525{
c0204fd2 2526 struct path my_path = {
ad389da7
TM		 2527 .dentry = dentry,
2528 };
c0204fd2 2529 struct path *path = &my_path;
1da177e4 2530 struct nfs4_state *state;
c0204fd2
TM		 2531 struct rpc_cred *cred = NULL;
2532 fmode_t fmode = 0;
1da177e4
LT		 2533 int status = 0;
2534
c0204fd2
TM		 2535 if (ctx != NULL) {
2536 cred = ctx->cred;
2537 path = &ctx->path;
2538 fmode = ctx->mode;
1da177e4 2539 }
a8a5da99 2540 sattr->ia_mode &= ~current_umask();
c0204fd2 2541 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2542 d_drop(dentry);
1da177e4
LT		 2543 if (IS_ERR(state)) {
2544 status = PTR_ERR(state);
c0204fd2 2545 goto out;
1da177e4 2546 }
d4d9cdcb 2547 d_add(dentry, igrab(state->inode));
d75340cc 2548 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2549 if (ctx != NULL)
2550 ctx->state = state;
02a913a7 2551 else
c0204fd2 2552 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2553out:
2554 return status;
2555}
2556
2557static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2558{
16e42959 2559 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2560 struct nfs_removeargs args = {
1da177e4 2561 .fh = NFS_FH(dir),
4fdc17b2
TM		 2562 .name.len = name->len,
2563 .name.name = name->name,
16e42959
TM		 2564 .bitmask = server->attr_bitmask,
2565 };
4fdc17b2 2566 struct nfs_removeres res = {
16e42959 2567 .server = server,
1da177e4 2568 };
1da177e4 2569 struct rpc_message msg = {
4fdc17b2
TM		 2570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2571 .rpc_argp = &args,
2572 .rpc_resp = &res,
1da177e4 2573 };
d346890b
TM		 2574 int status = -ENOMEM;
2575
2576 res.dir_attr = nfs_alloc_fattr();
2577 if (res.dir_attr == NULL)
2578 goto out;
1da177e4 2579
cccef3b9 2580 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2581 if (status == 0) {
2582 update_changeattr(dir, &res.cinfo);
d346890b 2583 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2584 }
d346890b
TM		 2585 nfs_free_fattr(res.dir_attr);
2586out:
1da177e4
LT		 2587 return status;
2588}
2589
2590static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2591{
2592 struct nfs4_exception exception = { };
2593 int err;
2594 do {
2595 err = nfs4_handle_exception(NFS_SERVER(dir),
2596 _nfs4_proc_remove(dir, name),
2597 &exception);
2598 } while (exception.retry);
2599 return err;
2600}
2601
e4eff1a6 2602static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2603{
e4eff1a6
TM		 2604 struct nfs_server *server = NFS_SERVER(dir);
2605 struct nfs_removeargs *args = msg->rpc_argp;
2606 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2607
a65318bf 2608 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2609 res->server = server;
dfb4f309 2610 res->seq_res.sr_slot = NULL;
1da177e4 2611 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2612}
2613
e4eff1a6 2614static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2615{
e4eff1a6
TM		 2616 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2617
14516c3a
TM		 2618 if (!nfs4_sequence_done(task, &res->seq_res))
2619 return 0;
9e33bed5 2620 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2621 return 0;
2622 update_changeattr(dir, &res->cinfo);
d346890b 2623 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2624 return 1;
1da177e4
LT		 2625}
2626
d3d4152a
JL		 2627static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2628{
2629 struct nfs_server *server = NFS_SERVER(dir);
2630 struct nfs_renameargs *arg = msg->rpc_argp;
2631 struct nfs_renameres *res = msg->rpc_resp;
2632
2633 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2634 arg->bitmask = server->attr_bitmask;
2635 res->server = server;
2636}
2637
2638static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2639 struct inode *new_dir)
2640{
2641 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2642
2643 if (!nfs4_sequence_done(task, &res->seq_res))
2644 return 0;
2645 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2646 return 0;
2647
2648 update_changeattr(old_dir, &res->old_cinfo);
2649 nfs_post_op_update_inode(old_dir, res->old_fattr);
2650 update_changeattr(new_dir, &res->new_cinfo);
2651 nfs_post_op_update_inode(new_dir, res->new_fattr);
2652 return 1;
2653}
2654
1da177e4
LT		 2655static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2656 struct inode *new_dir, struct qstr *new_name)
2657{
6caf2c82 2658 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2659 struct nfs_renameargs arg = {
1da177e4
LT		 2660 .old_dir = NFS_FH(old_dir),
2661 .new_dir = NFS_FH(new_dir),
2662 .old_name = old_name,
2663 .new_name = new_name,
6caf2c82
TM		 2664 .bitmask = server->attr_bitmask,
2665 };
e8582a8b 2666 struct nfs_renameres res = {
6caf2c82 2667 .server = server,
1da177e4 2668 };
1da177e4
LT		 2669 struct rpc_message msg = {
2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2671 .rpc_argp = &arg,
2672 .rpc_resp = &res,
2673 };
011fff72 2674 int status = -ENOMEM;
1da177e4 2675
011fff72
TM		 2676 res.old_fattr = nfs_alloc_fattr();
2677 res.new_fattr = nfs_alloc_fattr();
2678 if (res.old_fattr == NULL || res.new_fattr == NULL)
2679 goto out;
1da177e4 2680
011fff72 2681 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2682 if (!status) {
2683 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2684 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2685 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2686 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2687 }
011fff72
TM		 2688out:
2689 nfs_free_fattr(res.new_fattr);
2690 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2691 return status;
2692}
2693
2694static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2695 struct inode *new_dir, struct qstr *new_name)
2696{
2697 struct nfs4_exception exception = { };
2698 int err;
2699 do {
2700 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2701 _nfs4_proc_rename(old_dir, old_name,
2702 new_dir, new_name),
2703 &exception);
2704 } while (exception.retry);
2705 return err;
2706}
2707
2708static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2709{
91ba2eee 2710 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2711 struct nfs4_link_arg arg = {
2712 .fh = NFS_FH(inode),
2713 .dir_fh = NFS_FH(dir),
2714 .name = name,
91ba2eee
TM		 2715 .bitmask = server->attr_bitmask,
2716 };
91ba2eee
TM		 2717 struct nfs4_link_res res = {
2718 .server = server,
1da177e4 2719 };
1da177e4
LT		 2720 struct rpc_message msg = {
2721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2722 .rpc_argp = &arg,
91ba2eee 2723 .rpc_resp = &res,
1da177e4 2724 };
136f2627
TM		 2725 int status = -ENOMEM;
2726
2727 res.fattr = nfs_alloc_fattr();
2728 res.dir_attr = nfs_alloc_fattr();
2729 if (res.fattr == NULL || res.dir_attr == NULL)
2730 goto out;
1da177e4 2731
cccef3b9 2732 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2733 if (!status) {
2734 update_changeattr(dir, &res.cinfo);
2735 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2736 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2737 }
136f2627
TM		 2738out:
2739 nfs_free_fattr(res.dir_attr);
2740 nfs_free_fattr(res.fattr);
1da177e4
LT		 2741 return status;
2742}
2743
2744static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2745{
2746 struct nfs4_exception exception = { };
2747 int err;
2748 do {
2749 err = nfs4_handle_exception(NFS_SERVER(inode),
2750 _nfs4_proc_link(inode, dir, name),
2751 &exception);
2752 } while (exception.retry);
2753 return err;
2754}
2755
57dc9a57
TM		 2756struct nfs4_createdata {
2757 struct rpc_message msg;
2758 struct nfs4_create_arg arg;
2759 struct nfs4_create_res res;
2760 struct nfs_fh fh;
2761 struct nfs_fattr fattr;
2762 struct nfs_fattr dir_fattr;
2763};
2764
2765static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2766 struct qstr *name, struct iattr *sattr, u32 ftype)
2767{
2768 struct nfs4_createdata *data;
2769
2770 data = kzalloc(sizeof(*data), GFP_KERNEL);
2771 if (data != NULL) {
2772 struct nfs_server *server = NFS_SERVER(dir);
2773
2774 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2775 data->msg.rpc_argp = &data->arg;
2776 data->msg.rpc_resp = &data->res;
2777 data->arg.dir_fh = NFS_FH(dir);
2778 data->arg.server = server;
2779 data->arg.name = name;
2780 data->arg.attrs = sattr;
2781 data->arg.ftype = ftype;
2782 data->arg.bitmask = server->attr_bitmask;
2783 data->res.server = server;
2784 data->res.fh = &data->fh;
2785 data->res.fattr = &data->fattr;
2786 data->res.dir_fattr = &data->dir_fattr;
2787 nfs_fattr_init(data->res.fattr);
2788 nfs_fattr_init(data->res.dir_fattr);
2789 }
2790 return data;
2791}
2792
2793static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2794{
cccef3b9
AA		 2795 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2796 &data->arg, &data->res, 1);
57dc9a57
TM		 2797 if (status == 0) {
2798 update_changeattr(dir, &data->res.dir_cinfo);
2799 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2800 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2801 }
2802 return status;
2803}
2804
2805static void nfs4_free_createdata(struct nfs4_createdata *data)
2806{
2807 kfree(data);
2808}
2809
4f390c15 2810static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2811 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2812{
57dc9a57
TM		 2813 struct nfs4_createdata *data;
2814 int status = -ENAMETOOLONG;
1da177e4 2815
94a6d753 2816 if (len > NFS4_MAXPATHLEN)
57dc9a57 2817 goto out;
4f390c15 2818
57dc9a57
TM		 2819 status = -ENOMEM;
2820 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2821 if (data == NULL)
2822 goto out;
2823
2824 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2825 data->arg.u.symlink.pages = &page;
2826 data->arg.u.symlink.len = len;
1da177e4 2827
57dc9a57
TM		 2828 status = nfs4_do_create(dir, dentry, data);
2829
2830 nfs4_free_createdata(data);
2831out:
1da177e4
LT		 2832 return status;
2833}
2834
4f390c15 2835static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2836 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2837{
2838 struct nfs4_exception exception = { };
2839 int err;
2840 do {
2841 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2842 _nfs4_proc_symlink(dir, dentry, page,
2843 len, sattr),
1da177e4
LT		 2844 &exception);
2845 } while (exception.retry);
2846 return err;
2847}
2848
2849static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2850 struct iattr *sattr)
2851{
57dc9a57
TM		 2852 struct nfs4_createdata *data;
2853 int status = -ENOMEM;
1da177e4 2854
57dc9a57
TM		 2855 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2856 if (data == NULL)
2857 goto out;
2858
2859 status = nfs4_do_create(dir, dentry, data);
2860
2861 nfs4_free_createdata(data);
2862out:
1da177e4
LT		 2863 return status;
2864}
2865
2866static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2867 struct iattr *sattr)
2868{
2869 struct nfs4_exception exception = { };
2870 int err;
a8a5da99
AK		 2871
2872 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2873 do {
2874 err = nfs4_handle_exception(NFS_SERVER(dir),
2875 _nfs4_proc_mkdir(dir, dentry, sattr),
2876 &exception);
2877 } while (exception.retry);
2878 return err;
2879}
2880
2881static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2882 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2883{
2884 struct inode *dir = dentry->d_inode;
2885 struct nfs4_readdir_arg args = {
2886 .fh = NFS_FH(dir),
56e4ebf8 2887 .pages = pages,
1da177e4
LT		 2888 .pgbase = 0,
2889 .count = count,
96d25e53 2890 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2891 .plus = plus,
1da177e4
LT		 2892 };
2893 struct nfs4_readdir_res res;
2894 struct rpc_message msg = {
2895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2896 .rpc_argp = &args,
2897 .rpc_resp = &res,
2898 .rpc_cred = cred,
2899 };
2900 int status;
2901
3110ff80 2902 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2903 dentry->d_parent->d_name.name,
2904 dentry->d_name.name,
2905 (unsigned long long)cookie);
1da177e4
LT		 2906 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2907 res.pgbase = args.pgbase;
cccef3b9 2908 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
ac396128 2909 if (status >= 0) {
1da177e4 2910 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2911 status += args.pgbase;
2912 }
c4812998
TM		 2913
2914 nfs_invalidate_atime(dir);
2915
3110ff80 2916 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2917 return status;
2918}
2919
2920static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2921 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2922{
2923 struct nfs4_exception exception = { };
2924 int err;
2925 do {
2926 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2927 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2928 pages, count, plus),
1da177e4
LT		 2929 &exception);
2930 } while (exception.retry);
2931 return err;
2932}
2933
2934static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2935 struct iattr *sattr, dev_t rdev)
2936{
57dc9a57
TM		 2937 struct nfs4_createdata *data;
2938 int mode = sattr->ia_mode;
2939 int status = -ENOMEM;
1da177e4
LT		 2940
2941 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2942 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2943
2944 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2945 if (data == NULL)
2946 goto out;
2947
1da177e4 2948 if (S_ISFIFO(mode))
57dc9a57 2949 data->arg.ftype = NF4FIFO;
1da177e4 2950 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2951 data->arg.ftype = NF4BLK;
2952 data->arg.u.device.specdata1 = MAJOR(rdev);
2953 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2954 }
2955 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2956 data->arg.ftype = NF4CHR;
2957 data->arg.u.device.specdata1 = MAJOR(rdev);
2958 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2959 }
1da177e4 2960
57dc9a57
TM		 2961 status = nfs4_do_create(dir, dentry, data);
2962
2963 nfs4_free_createdata(data);
2964out:
1da177e4
LT		 2965 return status;
2966}
2967
2968static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2969 struct iattr *sattr, dev_t rdev)
2970{
2971 struct nfs4_exception exception = { };
2972 int err;
a8a5da99
AK		 2973
2974 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2975 do {
2976 err = nfs4_handle_exception(NFS_SERVER(dir),
2977 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2978 &exception);
2979 } while (exception.retry);
2980 return err;
2981}
2982
2983static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2984 struct nfs_fsstat *fsstat)
2985{
2986 struct nfs4_statfs_arg args = {
2987 .fh = fhandle,
2988 .bitmask = server->attr_bitmask,
2989 };
24ad148a
BH		 2990 struct nfs4_statfs_res res = {
2991 .fsstat = fsstat,
2992 };
1da177e4
LT		 2993 struct rpc_message msg = {
2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2995 .rpc_argp = &args,
24ad148a 2996 .rpc_resp = &res,
1da177e4
LT		 2997 };
2998
0e574af1 2999 nfs_fattr_init(fsstat->fattr);
cccef3b9 3000 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3001}
3002
3003static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3004{
3005 struct nfs4_exception exception = { };
3006 int err;
3007 do {
3008 err = nfs4_handle_exception(server,
3009 _nfs4_proc_statfs(server, fhandle, fsstat),
3010 &exception);
3011 } while (exception.retry);
3012 return err;
3013}
3014
3015static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3016 struct nfs_fsinfo *fsinfo)
3017{
3018 struct nfs4_fsinfo_arg args = {
3019 .fh = fhandle,
3020 .bitmask = server->attr_bitmask,
3021 };
3dda5e43
BH		 3022 struct nfs4_fsinfo_res res = {
3023 .fsinfo = fsinfo,
3024 };
1da177e4
LT		 3025 struct rpc_message msg = {
3026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3027 .rpc_argp = &args,
3dda5e43 3028 .rpc_resp = &res,
1da177e4
LT		 3029 };
3030
cccef3b9 3031 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3032}
3033
3034static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3035{
3036 struct nfs4_exception exception = { };
3037 int err;
3038
3039 do {
3040 err = nfs4_handle_exception(server,
3041 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3042 &exception);
3043 } while (exception.retry);
3044 return err;
3045}
3046
3047static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3048{
0e574af1 3049 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3050 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3051}
3052
3053static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3054 struct nfs_pathconf *pathconf)
3055{
3056 struct nfs4_pathconf_arg args = {
3057 .fh = fhandle,
3058 .bitmask = server->attr_bitmask,
3059 };
d45b2989
BH		 3060 struct nfs4_pathconf_res res = {
3061 .pathconf = pathconf,
3062 };
1da177e4
LT		 3063 struct rpc_message msg = {
3064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3065 .rpc_argp = &args,
d45b2989 3066 .rpc_resp = &res,
1da177e4
LT		 3067 };
3068
3069 /* None of the pathconf attributes are mandatory to implement */
3070 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3071 memset(pathconf, 0, sizeof(*pathconf));
3072 return 0;
3073 }
3074
0e574af1 3075 nfs_fattr_init(pathconf->fattr);
cccef3b9 3076 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3077}
3078
3079static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3080 struct nfs_pathconf *pathconf)
3081{
3082 struct nfs4_exception exception = { };
3083 int err;
3084
3085 do {
3086 err = nfs4_handle_exception(server,
3087 _nfs4_proc_pathconf(server, fhandle, pathconf),
3088 &exception);
3089 } while (exception.retry);
3090 return err;
3091}
3092
cbdabc7f 3093static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3094{
ec06c096 3095 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3096
9e33bed5 3097 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3098 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3099 return -EAGAIN;
1da177e4 3100 }
8850df99
TM		 3101
3102 nfs_invalidate_atime(data->inode);
1da177e4 3103 if (task->tk_status > 0)
ec06c096
TM		 3104 renew_lease(server, data->timestamp);
3105 return 0;
1da177e4
LT		 3106}
3107
cbdabc7f
AA		 3108static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3109{
3110
3111 dprintk("--> %s\n", __func__);
3112
3113 if (!nfs4_sequence_done(task, &data->res.seq_res))
3114 return -EAGAIN;
3115
3116 return data->read_done_cb(task, data);
3117}
3118
bdc7f021 3119static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3120{
1da177e4 3121 data->timestamp = jiffies;
cbdabc7f 3122 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3123 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3124}
3125
cbdabc7f
AA		 3126/* Reset the the nfs_read_data to send the read to the MDS. */
3127void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3128{
3129 dprintk("%s Reset task for i/o through\n", __func__);
3130 put_lseg(data->lseg);
3131 data->lseg = NULL;
3132 /* offsets will differ in the dense stripe case */
3133 data->args.offset = data->mds_offset;
3134 data->ds_clp = NULL;
3135 data->args.fh = NFS_FH(data->inode);
3136 data->read_done_cb = nfs4_read_done_cb;
3137 task->tk_ops = data->mds_ops;
3138 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3139}
3140EXPORT_SYMBOL_GPL(nfs4_reset_read);
3141
b029bc9b 3142static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3143{
1da177e4
LT		 3144 struct inode *inode = data->inode;
3145
9e33bed5 3146 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3147 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3148 return -EAGAIN;
1da177e4 3149 }
4f9838c7 3150 if (task->tk_status >= 0) {
1da177e4 3151 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3152 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3153 }
788e7a89 3154 return 0;
1da177e4
LT		 3155}
3156
b029bc9b
FI		 3157static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3158{
3159 if (!nfs4_sequence_done(task, &data->res.seq_res))
3160 return -EAGAIN;
3161 return data->write_done_cb(task, data);
3162}
3163
a69aef14
FI		 3164/* Reset the the nfs_write_data to send the write to the MDS. */
3165void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3166{
3167 dprintk("%s Reset task for i/o through\n", __func__);
3168 put_lseg(data->lseg);
3169 data->lseg = NULL;
3170 data->ds_clp = NULL;
3171 data->write_done_cb = nfs4_write_done_cb;
3172 data->args.fh = NFS_FH(data->inode);
3173 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3174 data->args.offset = data->mds_offset;
3175 data->res.fattr = &data->fattr;
3176 task->tk_ops = data->mds_ops;
3177 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3178}
3179EXPORT_SYMBOL_GPL(nfs4_reset_write);
3180
bdc7f021 3181static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3182{
bdc7f021
TM		 3183 struct nfs_server *server = NFS_SERVER(data->inode);
3184
7ffd1064
FI		 3185 if (data->lseg) {
3186 data->args.bitmask = NULL;
3187 data->res.fattr = NULL;
3188 } else
3189 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3190 if (!data->write_done_cb)
3191 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3192 data->res.server = server;
1da177e4
LT		 3193 data->timestamp = jiffies;
3194
bdc7f021 3195 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3196}
3197
788e7a89 3198static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3199{
1da177e4
LT		 3200 struct inode *inode = data->inode;
3201
14516c3a
TM		 3202 if (!nfs4_sequence_done(task, &data->res.seq_res))
3203 return -EAGAIN;
3204
9e33bed5 3205 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3206 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3207 return -EAGAIN;
1da177e4 3208 }
9e08a3c5 3209 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3210 return 0;
1da177e4
LT		 3211}
3212
bdc7f021 3213static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3214{
788e7a89 3215 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3216
a65318bf 3217 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3218 data->res.server = server;
bdc7f021 3219 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3220}
3221
9bc4e3ca
CL		 3222struct nfs4_renewdata {
3223 struct nfs_client *client;
3224 unsigned long timestamp;
3225};
3226
1da177e4
LT		 3227/*
3228 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3229 * standalone procedure for queueing an asynchronous RENEW.
3230 */
9bc4e3ca 3231static void nfs4_renew_release(void *calldata)
dc96aef9 3232{
9bc4e3ca
CL		 3233 struct nfs4_renewdata *data = calldata;
3234 struct nfs_client *clp = data->client;
dc96aef9 3235
0851de06
AB		 3236 if (atomic_read(&clp->cl_count) > 1)
3237 nfs4_schedule_state_renewal(clp);
3238 nfs_put_client(clp);
9bc4e3ca 3239 kfree(data);
dc96aef9
AB		 3240}
3241
9bc4e3ca 3242static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3243{
9bc4e3ca
CL		 3244 struct nfs4_renewdata *data = calldata;
3245 struct nfs_client *clp = data->client;
3246 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3247
3248 if (task->tk_status < 0) {
95baa25c
TM		 3249 /* Unless we're shutting down, schedule state recovery! */
3250 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3251 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3252 return;
3253 }
452e9352 3254 do_renew_lease(clp, timestamp);
1da177e4
LT		 3255}
3256
963d8fe5
TM		 3257static const struct rpc_call_ops nfs4_renew_ops = {
3258 .rpc_call_done = nfs4_renew_done,
dc96aef9 3259 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3260};
3261
adfa6f98 3262int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3263{
3264 struct rpc_message msg = {
3265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3266 .rpc_argp = clp,
b4454fe1 3267 .rpc_cred = cred,
1da177e4 3268 };
9bc4e3ca 3269 struct nfs4_renewdata *data;
1da177e4 3270
0851de06
AB		 3271 if (!atomic_inc_not_zero(&clp->cl_count))
3272 return -EIO;
9bc4e3ca
CL		 3273 data = kmalloc(sizeof(*data), GFP_KERNEL);
3274 if (data == NULL)
3275 return -ENOMEM;
3276 data->client = clp;
3277 data->timestamp = jiffies;
1da177e4 3278 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3279 &nfs4_renew_ops, data);
1da177e4
LT		 3280}
3281
adfa6f98 3282int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3283{
3284 struct rpc_message msg = {
3285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3286 .rpc_argp = clp,
b4454fe1 3287 .rpc_cred = cred,
1da177e4
LT		 3288 };
3289 unsigned long now = jiffies;
3290 int status;
3291
3292 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3293 if (status < 0)
3294 return status;
452e9352 3295 do_renew_lease(clp, now);
1da177e4
LT		 3296 return 0;
3297}
3298
aa1870af
BF		 3299static inline int nfs4_server_supports_acls(struct nfs_server *server)
3300{
3301 return (server->caps & NFS_CAP_ACLS)
3302 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3303 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3304}
3305
3306/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3307 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3308 * the stack.
3309 */
3310#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3311
3312static void buf_to_pages(const void *buf, size_t buflen,
3313 struct page **pages, unsigned int *pgbase)
3314{
3315 const void *p = buf;
3316
3317 *pgbase = offset_in_page(buf);
3318 p -= *pgbase;
3319 while (p < buf + buflen) {
3320 *(pages++) = virt_to_page(p);
3321 p += PAGE_CACHE_SIZE;
3322 }
3323}
3324
e9e3d724
NH		 3325static int buf_to_pages_noslab(const void *buf, size_t buflen,
3326 struct page **pages, unsigned int *pgbase)
3327{
3328 struct page *newpage, **spages;
3329 int rc = 0;
3330 size_t len;
3331 spages = pages;
3332
3333 do {
43b7c3f0 3334 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3335 newpage = alloc_page(GFP_KERNEL);
3336
3337 if (newpage == NULL)
3338 goto unwind;
3339 memcpy(page_address(newpage), buf, len);
3340 buf += len;
3341 buflen -= len;
3342 *pages++ = newpage;
3343 rc++;
3344 } while (buflen != 0);
3345
3346 return rc;
3347
3348unwind:
3349 for(; rc > 0; rc--)
3350 __free_page(spages[rc-1]);
3351 return -ENOMEM;
3352}
3353
e50a1c2e
BF		 3354struct nfs4_cached_acl {
3355 int cached;
3356 size_t len;
3e9d4154 3357 char data[0];
e50a1c2e
BF		 3358};
3359
3360static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3361{
3362 struct nfs_inode *nfsi = NFS_I(inode);
3363
3364 spin_lock(&inode->i_lock);
3365 kfree(nfsi->nfs4_acl);
3366 nfsi->nfs4_acl = acl;
3367 spin_unlock(&inode->i_lock);
3368}
3369
3370static void nfs4_zap_acl_attr(struct inode *inode)
3371{
3372 nfs4_set_cached_acl(inode, NULL);
3373}
3374
3375static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3376{
3377 struct nfs_inode *nfsi = NFS_I(inode);
3378 struct nfs4_cached_acl *acl;
3379 int ret = -ENOENT;
3380
3381 spin_lock(&inode->i_lock);
3382 acl = nfsi->nfs4_acl;
3383 if (acl == NULL)
3384 goto out;
3385 if (buf == NULL) /* user is just asking for length */
3386 goto out_len;
3387 if (acl->cached == 0)
3388 goto out;
3389 ret = -ERANGE; /* see getxattr(2) man page */
3390 if (acl->len > buflen)
3391 goto out;
3392 memcpy(buf, acl->data, acl->len);
3393out_len:
3394 ret = acl->len;
3395out:
3396 spin_unlock(&inode->i_lock);
3397 return ret;
3398}
3399
3400static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3401{
3402 struct nfs4_cached_acl *acl;
3403
3404 if (buf && acl_len <= PAGE_SIZE) {
3405 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3406 if (acl == NULL)
3407 goto out;
3408 acl->cached = 1;
3409 memcpy(acl->data, buf, acl_len);
3410 } else {
3411 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3412 if (acl == NULL)
3413 goto out;
3414 acl->cached = 0;
3415 }
3416 acl->len = acl_len;
3417out:
3418 nfs4_set_cached_acl(inode, acl);
3419}
3420
16b4289c 3421static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3422{
aa1870af
BF		 3423 struct page *pages[NFS4ACL_MAXPAGES];
3424 struct nfs_getaclargs args = {
3425 .fh = NFS_FH(inode),
3426 .acl_pages = pages,
3427 .acl_len = buflen,
3428 };
663c79b3
BH		 3429 struct nfs_getaclres res = {
3430 .acl_len = buflen,
3431 };
e50a1c2e 3432 void *resp_buf;
aa1870af
BF		 3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3435 .rpc_argp = &args,
663c79b3 3436 .rpc_resp = &res,
aa1870af 3437 };
e50a1c2e 3438 struct page *localpage = NULL;
aa1870af
BF		 3439 int ret;
3440
e50a1c2e
BF		 3441 if (buflen < PAGE_SIZE) {
3442 /* As long as we're doing a round trip to the server anyway,
3443 * let's be prepared for a page of acl data. */
3444 localpage = alloc_page(GFP_KERNEL);
3445 resp_buf = page_address(localpage);
3446 if (localpage == NULL)
3447 return -ENOMEM;
3448 args.acl_pages[0] = localpage;
3449 args.acl_pgbase = 0;
663c79b3 3450 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3451 } else {
3452 resp_buf = buf;
3453 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3454 }
cccef3b9 3455 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3456 if (ret)
3457 goto out_free;
663c79b3
BH		 3458 if (res.acl_len > args.acl_len)
3459 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3460 else
663c79b3 3461 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3462 if (buf) {
3463 ret = -ERANGE;
663c79b3 3464 if (res.acl_len > buflen)
e50a1c2e
BF		 3465 goto out_free;
3466 if (localpage)
663c79b3 3467 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3468 }
663c79b3 3469 ret = res.acl_len;
e50a1c2e
BF		 3470out_free:
3471 if (localpage)
3472 __free_page(localpage);
aa1870af
BF		 3473 return ret;
3474}
3475
16b4289c
TM		 3476static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3477{
3478 struct nfs4_exception exception = { };
3479 ssize_t ret;
3480 do {
3481 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3482 if (ret >= 0)
3483 break;
3484 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3485 } while (exception.retry);
3486 return ret;
3487}
3488
e50a1c2e
BF		 3489static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3490{
3491 struct nfs_server *server = NFS_SERVER(inode);
3492 int ret;
3493
3494 if (!nfs4_server_supports_acls(server))
3495 return -EOPNOTSUPP;
3496 ret = nfs_revalidate_inode(server, inode);
3497 if (ret < 0)
3498 return ret;
08a22b39
AK		 3499 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3500 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3501 ret = nfs4_read_cached_acl(inode, buf, buflen);
3502 if (ret != -ENOENT)
3503 return ret;
3504 return nfs4_get_acl_uncached(inode, buf, buflen);
3505}
3506
16b4289c 3507static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3508{
3509 struct nfs_server *server = NFS_SERVER(inode);
3510 struct page *pages[NFS4ACL_MAXPAGES];
3511 struct nfs_setaclargs arg = {
3512 .fh = NFS_FH(inode),
3513 .acl_pages = pages,
3514 .acl_len = buflen,
3515 };
73c403a9 3516 struct nfs_setaclres res;
4b580ee3
BF		 3517 struct rpc_message msg = {
3518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3519 .rpc_argp = &arg,
73c403a9 3520 .rpc_resp = &res,
4b580ee3 3521 };
e9e3d724 3522 int ret, i;
4b580ee3
BF		 3523
3524 if (!nfs4_server_supports_acls(server))
3525 return -EOPNOTSUPP;
e9e3d724
NH		 3526 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3527 if (i < 0)
3528 return i;
642ac549 3529 nfs_inode_return_delegation(inode);
cccef3b9 3530 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
e9e3d724
NH		 3531
3532 /*
3533 * Free each page after tx, so the only ref left is
3534 * held by the network stack
3535 */
3536 for (; i > 0; i--)
3537 put_page(pages[i-1]);
3538
08a22b39
AK		 3539 /*
3540 * Acl update can result in inode attribute update.
3541 * so mark the attribute cache invalid.
3542 */
3543 spin_lock(&inode->i_lock);
3544 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3545 spin_unlock(&inode->i_lock);
f41f7418
TM		 3546 nfs_access_zap_cache(inode);
3547 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3548 return ret;
3549}
3550
16b4289c
TM		 3551static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3552{
3553 struct nfs4_exception exception = { };
3554 int err;
3555 do {
3556 err = nfs4_handle_exception(NFS_SERVER(inode),
3557 __nfs4_proc_set_acl(inode, buf, buflen),
3558 &exception);
3559 } while (exception.retry);
3560 return err;
3561}
3562
1da177e4 3563static int
aa5190d0 3564nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3565{
aa5190d0
TM		 3566 struct nfs_client *clp = server->nfs_client;
3567
3568 if (task->tk_status >= 0)
1da177e4
LT		 3569 return 0;
3570 switch(task->tk_status) {
9e33bed5
TM		 3571 case -NFS4ERR_ADMIN_REVOKED:
3572 case -NFS4ERR_BAD_STATEID:
3573 case -NFS4ERR_OPENMODE:
3574 if (state == NULL)
3575 break;
0400a6b0
TM		 3576 nfs4_schedule_stateid_recovery(server, state);
3577 goto wait_on_recovery;
1da177e4 3578 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3579 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3580 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3581 nfs4_schedule_lease_recovery(clp);
3582 goto wait_on_recovery;
4745e315
AA		 3583#if defined(CONFIG_NFS_V4_1)
3584 case -NFS4ERR_BADSESSION:
3585 case -NFS4ERR_BADSLOT:
3586 case -NFS4ERR_BAD_HIGH_SLOT:
3587 case -NFS4ERR_DEADSESSION:
3588 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3589 case -NFS4ERR_SEQ_FALSE_RETRY:
3590 case -NFS4ERR_SEQ_MISORDERED:
3591 dprintk("%s ERROR %d, Reset session\n", __func__,
3592 task->tk_status);
0400a6b0 3593 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3594 task->tk_status = 0;
3595 return -EAGAIN;
3596#endif /* CONFIG_NFS_V4_1 */
1da177e4 3597 case -NFS4ERR_DELAY:
aa5190d0 3598 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3599 case -NFS4ERR_GRACE:
2c643488 3600 case -EKEYEXPIRED:
1da177e4
LT		 3601 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3602 task->tk_status = 0;
3603 return -EAGAIN;
3604 case -NFS4ERR_OLD_STATEID:
3605 task->tk_status = 0;
3606 return -EAGAIN;
3607 }
3608 task->tk_status = nfs4_map_errors(task->tk_status);
3609 return 0;
0400a6b0 3610wait_on_recovery:
a2c0b9e2 3611 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3612 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3613 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3614 task->tk_status = 0;
3615 return -EAGAIN;
1da177e4
LT		 3616}
3617
bb8b27e5
TM		 3618int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3619 unsigned short port, struct rpc_cred *cred,
3620 struct nfs4_setclientid_res *res)
1da177e4
LT		 3621{
3622 nfs4_verifier sc_verifier;
3623 struct nfs4_setclientid setclientid = {
3624 .sc_verifier = &sc_verifier,
3625 .sc_prog = program,
f4eecd5d 3626 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3627 };
3628 struct rpc_message msg = {
3629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3630 .rpc_argp = &setclientid,
bb8b27e5 3631 .rpc_resp = res,
286d7d6a 3632 .rpc_cred = cred,
1da177e4 3633 };
bc4785cd 3634 __be32 *p;
1da177e4
LT		 3635 int loop = 0;
3636 int status;
3637
bc4785cd 3638 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3639 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3640 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3641
3642 for(;;) {
3643 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3644 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3645 clp->cl_ipaddr,
3646 rpc_peeraddr2str(clp->cl_rpcclient,
3647 RPC_DISPLAY_ADDR),
69dd716c
TM		 3648 rpc_peeraddr2str(clp->cl_rpcclient,
3649 RPC_DISPLAY_PROTO),
78ea323b 3650 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3651 clp->cl_id_uniquifier);
3652 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3653 sizeof(setclientid.sc_netid),
3654 rpc_peeraddr2str(clp->cl_rpcclient,
3655 RPC_DISPLAY_NETID));
1da177e4 3656 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3657 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3658 clp->cl_ipaddr, port >> 8, port & 255);
3659
3660 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3661 if (status != -NFS4ERR_CLID_INUSE)
3662 break;
3663 if (signalled())
3664 break;
3665 if (loop++ & 1)
611c96c8 3666 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3667 else
3668 if (++clp->cl_id_uniquifier == 0)
3669 break;
3670 }
3671 return status;
3672}
3673
bb8b27e5
TM		 3674static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3675 struct nfs4_setclientid_res *arg,
3676 struct rpc_cred *cred)
1da177e4
LT		 3677{
3678 struct nfs_fsinfo fsinfo;
3679 struct rpc_message msg = {
3680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3681 .rpc_argp = arg,
1da177e4 3682 .rpc_resp = &fsinfo,
286d7d6a 3683 .rpc_cred = cred,
1da177e4
LT		 3684 };
3685 unsigned long now;
3686 int status;
3687
3688 now = jiffies;
3689 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3690 if (status == 0) {
3691 spin_lock(&clp->cl_lock);
3692 clp->cl_lease_time = fsinfo.lease_time * HZ;
3693 clp->cl_last_renewal = now;
3694 spin_unlock(&clp->cl_lock);
3695 }
3696 return status;
3697}
3698
bb8b27e5
TM		 3699int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3700 struct nfs4_setclientid_res *arg,
3701 struct rpc_cred *cred)
51581f3b 3702{
77e03677 3703 long timeout = 0;
51581f3b
TM		 3704 int err;
3705 do {
bb8b27e5 3706 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3707 switch (err) {
3708 case 0:
3709 return err;
3710 case -NFS4ERR_RESOURCE:
3711 /* The IBM lawyers misread another document! */
3712 case -NFS4ERR_DELAY:
3713 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3714 }
3715 } while (err == 0);
3716 return err;
3717}
3718
fe650407
TM		 3719struct nfs4_delegreturndata {
3720 struct nfs4_delegreturnargs args;
fa178f29 3721 struct nfs4_delegreturnres res;
fe650407
TM		 3722 struct nfs_fh fh;
3723 nfs4_stateid stateid;
26e976a8 3724 unsigned long timestamp;
fa178f29 3725 struct nfs_fattr fattr;
fe650407
TM		 3726 int rpc_status;
3727};
3728
fe650407
TM		 3729static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3730{
3731 struct nfs4_delegreturndata *data = calldata;
938e1010 3732
14516c3a
TM		 3733 if (!nfs4_sequence_done(task, &data->res.seq_res))
3734 return;
938e1010 3735
79708861
RL		 3736 switch (task->tk_status) {
3737 case -NFS4ERR_STALE_STATEID:
3738 case -NFS4ERR_EXPIRED:
3739 case 0:
fa178f29 3740 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3741 break;
3742 default:
3743 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3744 -EAGAIN) {
3745 nfs_restart_rpc(task, data->res.server->nfs_client);
3746 return;
3747 }
3748 }
3749 data->rpc_status = task->tk_status;
fe650407
TM		 3750}
3751
3752static void nfs4_delegreturn_release(void *calldata)
3753{
fe650407
TM		 3754 kfree(calldata);
3755}
3756
938e1010
AA		 3757#if defined(CONFIG_NFS_V4_1)
3758static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3759{
3760 struct nfs4_delegreturndata *d_data;
3761
3762 d_data = (struct nfs4_delegreturndata *)data;
3763
035168ab 3764 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3765 &d_data->args.seq_args,
3766 &d_data->res.seq_res, 1, task))
3767 return;
3768 rpc_call_start(task);
3769}
3770#endif /* CONFIG_NFS_V4_1 */
3771
c8d149f3 3772static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3773#if defined(CONFIG_NFS_V4_1)
3774 .rpc_call_prepare = nfs4_delegreturn_prepare,
3775#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3776 .rpc_call_done = nfs4_delegreturn_done,
3777 .rpc_release = nfs4_delegreturn_release,
3778};
3779
e6f81075 3780static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3781{
3782 struct nfs4_delegreturndata *data;
fa178f29 3783 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3784 struct rpc_task *task;
5138fde0
TM		 3785 struct rpc_message msg = {
3786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3787 .rpc_cred = cred,
3788 };
c970aa85
TM		 3789 struct rpc_task_setup task_setup_data = {
3790 .rpc_client = server->client,
5138fde0 3791 .rpc_message = &msg,
c970aa85
TM		 3792 .callback_ops = &nfs4_delegreturn_ops,
3793 .flags = RPC_TASK_ASYNC,
3794 };
e6f81075 3795 int status = 0;
fe650407 3796
8535b2be 3797 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3798 if (data == NULL)
3799 return -ENOMEM;
3800 data->args.fhandle = &data->fh;
3801 data->args.stateid = &data->stateid;
fa178f29 3802 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3803 nfs_copy_fh(&data->fh, NFS_FH(inode));
3804 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3805 data->res.fattr = &data->fattr;
3806 data->res.server = server;
5138fde0 3807 nfs_fattr_init(data->res.fattr);
26e976a8 3808 data->timestamp = jiffies;
fe650407
TM		 3809 data->rpc_status = 0;
3810
c970aa85 3811 task_setup_data.callback_data = data;
1174dd1f
TM		 3812 msg.rpc_argp = &data->args;
3813 msg.rpc_resp = &data->res;
c970aa85 3814 task = rpc_run_task(&task_setup_data);
7a1218a2 3815 if (IS_ERR(task))
fe650407 3816 return PTR_ERR(task);
e6f81075
TM		 3817 if (!issync)
3818 goto out;
fe650407 3819 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3820 if (status != 0)
3821 goto out;
3822 status = data->rpc_status;
3823 if (status != 0)
3824 goto out;
3825 nfs_refresh_inode(inode, &data->fattr);
3826out:
e6b3c4db 3827 rpc_put_task(task);
fe650407 3828 return status;
1da177e4
LT		 3829}
3830
e6f81075 3831int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3832{
3833 struct nfs_server *server = NFS_SERVER(inode);
3834 struct nfs4_exception exception = { };
3835 int err;
3836 do {
e6f81075 3837 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3838 switch (err) {
3839 case -NFS4ERR_STALE_STATEID:
3840 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3841 case 0:
3842 return 0;
3843 }
3844 err = nfs4_handle_exception(server, err, &exception);
3845 } while (exception.retry);
3846 return err;
3847}
3848
3849#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3850#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3851
3852/*
3853 * sleep, with exponential backoff, and retry the LOCK operation.
3854 */
3855static unsigned long
3856nfs4_set_lock_task_retry(unsigned long timeout)
3857{
150030b7 3858 schedule_timeout_killable(timeout);
1da177e4
LT		 3859 timeout <<= 1;
3860 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3861 return NFS4_LOCK_MAXTIMEOUT;
3862 return timeout;
3863}
3864
1da177e4
LT		 3865static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3866{
3867 struct inode *inode = state->inode;
3868 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3869 struct nfs_client *clp = server->nfs_client;
911d1aaf 3870 struct nfs_lockt_args arg = {
1da177e4 3871 .fh = NFS_FH(inode),
911d1aaf 3872 .fl = request,
1da177e4 3873 };
911d1aaf
TM		 3874 struct nfs_lockt_res res = {
3875 .denied = request,
1da177e4
LT		 3876 };
3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3879 .rpc_argp = &arg,
3880 .rpc_resp = &res,
3881 .rpc_cred = state->owner->so_cred,
3882 };
1da177e4
LT		 3883 struct nfs4_lock_state *lsp;
3884 int status;
3885
911d1aaf 3886 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3887 status = nfs4_set_lock_state(state, request);
3888 if (status != 0)
3889 goto out;
3890 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3891 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3892 arg.lock_owner.s_dev = server->s_dev;
cccef3b9 3893 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3894 switch (status) {
3895 case 0:
3896 request->fl_type = F_UNLCK;
3897 break;
3898 case -NFS4ERR_DENIED:
3899 status = 0;
1da177e4 3900 }
70cc6487 3901 request->fl_ops->fl_release_private(request);
8d0a8a9d 3902out:
1da177e4
LT		 3903 return status;
3904}
3905
3906static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3907{
3908 struct nfs4_exception exception = { };
3909 int err;
3910
3911 do {
3912 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3913 _nfs4_proc_getlk(state, cmd, request),
3914 &exception);
3915 } while (exception.retry);
3916 return err;
3917}
3918
3919static int do_vfs_lock(struct file *file, struct file_lock *fl)
3920{
3921 int res = 0;
3922 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3923 case FL_POSIX:
3924 res = posix_lock_file_wait(file, fl);
3925 break;
3926 case FL_FLOCK:
3927 res = flock_lock_file_wait(file, fl);
3928 break;
3929 default:
3930 BUG();
3931 }
1da177e4
LT		 3932 return res;
3933}
3934
faf5f49c 3935struct nfs4_unlockdata {
911d1aaf
TM		 3936 struct nfs_locku_args arg;
3937 struct nfs_locku_res res;
faf5f49c
TM		 3938 struct nfs4_lock_state *lsp;
3939 struct nfs_open_context *ctx;
911d1aaf
TM		 3940 struct file_lock fl;
3941 const struct nfs_server *server;
26e976a8 3942 unsigned long timestamp;
faf5f49c
TM		 3943};
3944
911d1aaf
TM		 3945static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3946 struct nfs_open_context *ctx,
3947 struct nfs4_lock_state *lsp,
3948 struct nfs_seqid *seqid)
3949{
3950 struct nfs4_unlockdata *p;
3951 struct inode *inode = lsp->ls_state->inode;
3952
8535b2be 3953 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3954 if (p == NULL)
3955 return NULL;
3956 p->arg.fh = NFS_FH(inode);
3957 p->arg.fl = &p->fl;
3958 p->arg.seqid = seqid;
c1d51931 3959 p->res.seqid = seqid;
911d1aaf
TM		 3960 p->arg.stateid = &lsp->ls_stateid;
3961 p->lsp = lsp;
3962 atomic_inc(&lsp->ls_count);
3963 /* Ensure we don't close file until we're done freeing locks! */
3964 p->ctx = get_nfs_open_context(ctx);
3965 memcpy(&p->fl, fl, sizeof(p->fl));
3966 p->server = NFS_SERVER(inode);
3967 return p;
3968}
3969
06f814a3 3970static void nfs4_locku_release_calldata(void *data)
faf5f49c 3971{
963d8fe5 3972 struct nfs4_unlockdata *calldata = data;
911d1aaf 3973 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3974 nfs4_put_lock_state(calldata->lsp);
3975 put_nfs_open_context(calldata->ctx);
3976 kfree(calldata);
faf5f49c
TM		 3977}
3978
963d8fe5 3979static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3980{
963d8fe5 3981 struct nfs4_unlockdata *calldata = data;
faf5f49c 3982
14516c3a
TM		 3983 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3984 return;
faf5f49c
TM		 3985 switch (task->tk_status) {
3986 case 0:
3987 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3988 calldata->res.stateid.data,
faf5f49c 3989 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3990 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3991 break;
9e33bed5
TM		 3992 case -NFS4ERR_BAD_STATEID:
3993 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3994 case -NFS4ERR_STALE_STATEID:
3995 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3996 break;
3997 default:
9e33bed5 3998 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3999 nfs_restart_rpc(task,
d61e612a 4000 calldata->server->nfs_client);
faf5f49c 4001 }
faf5f49c
TM		 4002}
4003
4ce70ada 4004static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4005{
4ce70ada 4006 struct nfs4_unlockdata *calldata = data;
faf5f49c 4007
911d1aaf 4008 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4009 return;
4010 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4011 /* Note: exit _without_ running nfs4_locku_done */
4012 task->tk_action = NULL;
faf5f49c
TM		 4013 return;
4014 }
26e976a8 4015 calldata->timestamp = jiffies;
035168ab 4016 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4017 &calldata->arg.seq_args,
4018 &calldata->res.seq_res, 1, task))
4019 return;
5138fde0 4020 rpc_call_start(task);
faf5f49c
TM		 4021}
4022
963d8fe5 4023static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4024 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4025 .rpc_call_done = nfs4_locku_done,
06f814a3 4026 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4027};
4028
a5d16a4d
TM		 4029static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4030 struct nfs_open_context *ctx,
4031 struct nfs4_lock_state *lsp,
4032 struct nfs_seqid *seqid)
4033{
4034 struct nfs4_unlockdata *data;
5138fde0
TM		 4035 struct rpc_message msg = {
4036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4037 .rpc_cred = ctx->cred,
4038 };
c970aa85
TM		 4039 struct rpc_task_setup task_setup_data = {
4040 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4041 .rpc_message = &msg,
c970aa85 4042 .callback_ops = &nfs4_locku_ops,
101070ca 4043 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4044 .flags = RPC_TASK_ASYNC,
4045 };
a5d16a4d 4046
137d6aca
FF		 4047 /* Ensure this is an unlock - when canceling a lock, the
4048 * canceled lock is passed in, and it won't be an unlock.
4049 */
4050 fl->fl_type = F_UNLCK;
4051
a5d16a4d
TM		 4052 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4053 if (data == NULL) {
4054 nfs_free_seqid(seqid);
4055 return ERR_PTR(-ENOMEM);
4056 }
4057
1174dd1f
TM		 4058 msg.rpc_argp = &data->arg;
4059 msg.rpc_resp = &data->res;
c970aa85
TM		 4060 task_setup_data.callback_data = data;
4061 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4062}
4063
faf5f49c
TM		 4064static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4065{
19e03c57 4066 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4067 struct nfs_seqid *seqid;
1da177e4 4068 struct nfs4_lock_state *lsp;
06f814a3
TM		 4069 struct rpc_task *task;
4070 int status = 0;
536ff0f8 4071 unsigned char fl_flags = request->fl_flags;
faf5f49c 4072
8d0a8a9d 4073 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4074 /* Unlock _before_ we do the RPC call */
4075 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4076 down_read(&nfsi->rwsem);
4077 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4078 up_read(&nfsi->rwsem);
9b073574 4079 goto out;
19e03c57
TM		 4080 }
4081 up_read(&nfsi->rwsem);
8d0a8a9d 4082 if (status != 0)
9b073574
TM		 4083 goto out;
4084 /* Is this a delegated lock? */
4085 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4086 goto out;
8d0a8a9d 4087 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4088 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4089 status = -ENOMEM;
911d1aaf 4090 if (seqid == NULL)
9b073574 4091 goto out;
cd3758e3 4092 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4093 status = PTR_ERR(task);
4094 if (IS_ERR(task))
9b073574 4095 goto out;
a5d16a4d 4096 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4097 rpc_put_task(task);
9b073574 4098out:
536ff0f8 4099 request->fl_flags = fl_flags;
1da177e4
LT		 4100 return status;
4101}
4102
a5d16a4d
TM		 4103struct nfs4_lockdata {
4104 struct nfs_lock_args arg;
4105 struct nfs_lock_res res;
4106 struct nfs4_lock_state *lsp;
4107 struct nfs_open_context *ctx;
4108 struct file_lock fl;
26e976a8 4109 unsigned long timestamp;
a5d16a4d
TM		 4110 int rpc_status;
4111 int cancelled;
66179efe 4112 struct nfs_server *server;
a5d16a4d
TM		 4113};
4114
4115static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4116 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4117 gfp_t gfp_mask)
1da177e4 4118{
a5d16a4d
TM		 4119 struct nfs4_lockdata *p;
4120 struct inode *inode = lsp->ls_state->inode;
1da177e4 4121 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4122
8535b2be 4123 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4124 if (p == NULL)
4125 return NULL;
4126
4127 p->arg.fh = NFS_FH(inode);
4128 p->arg.fl = &p->fl;
8535b2be 4129 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4130 if (p->arg.open_seqid == NULL)
4131 goto out_free;
8535b2be 4132 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4133 if (p->arg.lock_seqid == NULL)
2f74c0a0 4134 goto out_free_seqid;
a5d16a4d 4135 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4136 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4137 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4138 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4139 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4140 p->lsp = lsp;
66179efe 4141 p->server = server;
a5d16a4d
TM		 4142 atomic_inc(&lsp->ls_count);
4143 p->ctx = get_nfs_open_context(ctx);
4144 memcpy(&p->fl, fl, sizeof(p->fl));
4145 return p;
2f74c0a0
TM		 4146out_free_seqid:
4147 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4148out_free:
4149 kfree(p);
4150 return NULL;
4151}
4152
4153static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4154{
4155 struct nfs4_lockdata *data = calldata;
4156 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4157
3110ff80 4158 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4159 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4160 return;
a5d16a4d
TM		 4161 /* Do we need to do an open_to_lock_owner? */
4162 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4163 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4164 return;
a5d16a4d
TM		 4165 data->arg.open_stateid = &state->stateid;
4166 data->arg.new_lock_owner = 1;
c1d51931 4167 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4168 } else
4169 data->arg.new_lock_owner = 0;
26e976a8 4170 data->timestamp = jiffies;
035168ab
TM		 4171 if (nfs4_setup_sequence(data->server,
4172 &data->arg.seq_args,
66179efe
AA		 4173 &data->res.seq_res, 1, task))
4174 return;
5138fde0 4175 rpc_call_start(task);
3110ff80 4176 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4177}
4178
b257957e
AB		 4179static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4180{
4181 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4182 nfs4_lock_prepare(task, calldata);
4183}
4184
a5d16a4d
TM		 4185static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4186{
4187 struct nfs4_lockdata *data = calldata;
4188
3110ff80 4189 dprintk("%s: begin!\n", __func__);
a5d16a4d 4190
14516c3a
TM		 4191 if (!nfs4_sequence_done(task, &data->res.seq_res))
4192 return;
66179efe 4193
a5d16a4d 4194 data->rpc_status = task->tk_status;
a5d16a4d 4195 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4196 if (data->rpc_status == 0)
4197 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4198 else
4199 goto out;
4200 }
4201 if (data->rpc_status == 0) {
4202 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4203 sizeof(data->lsp->ls_stateid.data));
4204 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4205 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4206 }
a5d16a4d 4207out:
3110ff80 4208 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4209}
4210
4211static void nfs4_lock_release(void *calldata)
4212{
4213 struct nfs4_lockdata *data = calldata;
4214
3110ff80 4215 dprintk("%s: begin!\n", __func__);
2f74c0a0 4216 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4217 if (data->cancelled != 0) {
4218 struct rpc_task *task;
4219 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4220 data->arg.lock_seqid);
4221 if (!IS_ERR(task))
bf294b41 4222 rpc_put_task_async(task);
3110ff80 4223 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4224 } else
4225 nfs_free_seqid(data->arg.lock_seqid);
4226 nfs4_put_lock_state(data->lsp);
4227 put_nfs_open_context(data->ctx);
4228 kfree(data);
3110ff80 4229 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4230}
4231
4232static const struct rpc_call_ops nfs4_lock_ops = {
4233 .rpc_call_prepare = nfs4_lock_prepare,
4234 .rpc_call_done = nfs4_lock_done,
4235 .rpc_release = nfs4_lock_release,
4236};
4237
b257957e
AB		 4238static const struct rpc_call_ops nfs4_recover_lock_ops = {
4239 .rpc_call_prepare = nfs4_recover_lock_prepare,
4240 .rpc_call_done = nfs4_lock_done,
4241 .rpc_release = nfs4_lock_release,
4242};
4243
2bee72a6
TM		 4244static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4245{
2bee72a6
TM		 4246 switch (error) {
4247 case -NFS4ERR_ADMIN_REVOKED:
4248 case -NFS4ERR_BAD_STATEID:
ecac799a 4249 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4250 if (new_lock_owner != 0 ||
4251 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4252 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4253 break;
4254 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4255 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4256 case -NFS4ERR_EXPIRED:
4257 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4258 };
4259}
4260
afe6c27c 4261static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4262{
4263 struct nfs4_lockdata *data;
4264 struct rpc_task *task;
5138fde0
TM		 4265 struct rpc_message msg = {
4266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4267 .rpc_cred = state->owner->so_cred,
4268 };
c970aa85
TM		 4269 struct rpc_task_setup task_setup_data = {
4270 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4271 .rpc_message = &msg,
c970aa85 4272 .callback_ops = &nfs4_lock_ops,
101070ca 4273 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4274 .flags = RPC_TASK_ASYNC,
4275 };
a5d16a4d
TM		 4276 int ret;
4277
3110ff80 4278 dprintk("%s: begin!\n", __func__);
cd3758e3 4279 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4280 fl->fl_u.nfs4_fl.owner,
4281 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4282 if (data == NULL)
4283 return -ENOMEM;
4284 if (IS_SETLKW(cmd))
4285 data->arg.block = 1;
b257957e
AB		 4286 if (recovery_type > NFS_LOCK_NEW) {
4287 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4288 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4289 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4290 }
1174dd1f
TM		 4291 msg.rpc_argp = &data->arg;
4292 msg.rpc_resp = &data->res;
c970aa85
TM		 4293 task_setup_data.callback_data = data;
4294 task = rpc_run_task(&task_setup_data);
7a1218a2 4295 if (IS_ERR(task))
a5d16a4d 4296 return PTR_ERR(task);
a5d16a4d
TM		 4297 ret = nfs4_wait_for_completion_rpc_task(task);
4298 if (ret == 0) {
4299 ret = data->rpc_status;
2bee72a6
TM		 4300 if (ret)
4301 nfs4_handle_setlk_error(data->server, data->lsp,
4302 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4303 } else
4304 data->cancelled = 1;
e6b3c4db 4305 rpc_put_task(task);
3110ff80 4306 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4307 return ret;
1da177e4
LT		 4308}
4309
4310static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4311{
202b50dc
TM		 4312 struct nfs_server *server = NFS_SERVER(state->inode);
4313 struct nfs4_exception exception = { };
4314 int err;
4315
4316 do {
42a2d13e
TM		 4317 /* Cache the lock if possible... */
4318 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4319 return 0;
afe6c27c 4320 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4321 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4322 break;
4323 nfs4_handle_exception(server, err, &exception);
4324 } while (exception.retry);
4325 return err;
1da177e4
LT		 4326}
4327
4328static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4329{
202b50dc
TM		 4330 struct nfs_server *server = NFS_SERVER(state->inode);
4331 struct nfs4_exception exception = { };
4332 int err;
4333
6bfc93ef
TM		 4334 err = nfs4_set_lock_state(state, request);
4335 if (err != 0)
4336 return err;
202b50dc 4337 do {
42a2d13e
TM		 4338 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4339 return 0;
afe6c27c 4340 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4341 switch (err) {
4342 default:
4343 goto out;
4344 case -NFS4ERR_GRACE:
4345 case -NFS4ERR_DELAY:
4346 nfs4_handle_exception(server, err, &exception);
4347 err = 0;
4348 }
202b50dc 4349 } while (exception.retry);
a9ed2e25 4350out:
202b50dc 4351 return err;
1da177e4
LT		 4352}
4353
4354static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4355{
19e03c57 4356 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4357 unsigned char fl_flags = request->fl_flags;
8e469ebd 4358 int status = -ENOLCK;
1da177e4 4359
8e469ebd
TM		 4360 if ((fl_flags & FL_POSIX) &&
4361 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4362 goto out;
6bfc93ef 4363 /* Is this a delegated open? */
6bfc93ef
TM		 4364 status = nfs4_set_lock_state(state, request);
4365 if (status != 0)
4366 goto out;
01c3b861
TM		 4367 request->fl_flags |= FL_ACCESS;
4368 status = do_vfs_lock(request->fl_file, request);
4369 if (status < 0)
4370 goto out;
19e03c57 4371 down_read(&nfsi->rwsem);
01c3b861 4372 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4373 /* Yes: cache locks! */
01c3b861 4374 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4375 request->fl_flags = fl_flags & ~FL_SLEEP;
4376 status = do_vfs_lock(request->fl_file, request);
4377 goto out_unlock;
01c3b861 4378 }
afe6c27c 4379 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4380 if (status != 0)
01c3b861 4381 goto out_unlock;
6bfc93ef 4382 /* Note: we always want to sleep here! */
01c3b861 4383 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4384 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4385 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4386out_unlock:
19e03c57 4387 up_read(&nfsi->rwsem);
01c3b861
TM		 4388out:
4389 request->fl_flags = fl_flags;
1da177e4
LT		 4390 return status;
4391}
4392
4393static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4394{
4395 struct nfs4_exception exception = { };
4396 int err;
4397
4398 do {
965b5d67
TM		 4399 err = _nfs4_proc_setlk(state, cmd, request);
4400 if (err == -NFS4ERR_DENIED)
4401 err = -EAGAIN;
1da177e4 4402 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4403 err, &exception);
1da177e4
LT		 4404 } while (exception.retry);
4405 return err;
4406}
4407
4408static int
4409nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4410{
4411 struct nfs_open_context *ctx;
4412 struct nfs4_state *state;
4413 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4414 int status;
4415
4416 /* verify open state */
cd3758e3 4417 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4418 state = ctx->state;
4419
4420 if (request->fl_start < 0 || request->fl_end < 0)
4421 return -EINVAL;
4422
d953126a
TM		 4423 if (IS_GETLK(cmd)) {
4424 if (state != NULL)
4425 return nfs4_proc_getlk(state, F_GETLK, request);
4426 return 0;
4427 }
1da177e4
LT		 4428
4429 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4430 return -EINVAL;
4431
d953126a
TM		 4432 if (request->fl_type == F_UNLCK) {
4433 if (state != NULL)
4434 return nfs4_proc_unlck(state, cmd, request);
4435 return 0;
4436 }
1da177e4 4437
d953126a
TM		 4438 if (state == NULL)
4439 return -ENOLCK;
1da177e4
LT		 4440 do {
4441 status = nfs4_proc_setlk(state, cmd, request);
4442 if ((status != -EAGAIN) || IS_SETLK(cmd))
4443 break;
4444 timeout = nfs4_set_lock_task_retry(timeout);
4445 status = -ERESTARTSYS;
4446 if (signalled())
4447 break;
4448 } while(status < 0);
1da177e4
LT		 4449 return status;
4450}
4451
888e694c
TM		 4452int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4453{
4454 struct nfs_server *server = NFS_SERVER(state->inode);
4455 struct nfs4_exception exception = { };
4456 int err;
4457
4458 err = nfs4_set_lock_state(state, fl);
4459 if (err != 0)
4460 goto out;
4461 do {
afe6c27c 4462 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4463 switch (err) {
4464 default:
4465 printk(KERN_ERR "%s: unhandled error %d.\n",
4466 __func__, err);
4467 case 0:
965b5d67 4468 case -ESTALE:
d5122201
TM		 4469 goto out;
4470 case -NFS4ERR_EXPIRED:
4471 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4472 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4473 nfs4_schedule_lease_recovery(server->nfs_client);
4474 goto out;
74e7bb73
RL		 4475 case -NFS4ERR_BADSESSION:
4476 case -NFS4ERR_BADSLOT:
4477 case -NFS4ERR_BAD_HIGH_SLOT:
4478 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4479 case -NFS4ERR_DEADSESSION:
0400a6b0 4480 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4481 goto out;
965b5d67
TM		 4482 case -ERESTARTSYS:
4483 /*
4484 * The show must go on: exit, but mark the
4485 * stateid as needing recovery.
4486 */
4487 case -NFS4ERR_ADMIN_REVOKED:
4488 case -NFS4ERR_BAD_STATEID:
4489 case -NFS4ERR_OPENMODE:
0400a6b0 4490 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4491 err = 0;
4492 goto out;
168667c4
TM		 4493 case -EKEYEXPIRED:
4494 /*
4495 * User RPCSEC_GSS context has expired.
4496 * We cannot recover this stateid now, so
4497 * skip it and allow recovery thread to
4498 * proceed.
4499 */
4500 err = 0;
4501 goto out;
965b5d67
TM		 4502 case -ENOMEM:
4503 case -NFS4ERR_DENIED:
4504 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4505 err = 0;
4506 goto out;
d5122201
TM		 4507 case -NFS4ERR_DELAY:
4508 break;
4509 }
888e694c
TM		 4510 err = nfs4_handle_exception(server, err, &exception);
4511 } while (exception.retry);
4512out:
4513 return err;
4514}
6b3b5496 4515
d3c7b7cc
TM		 4516static void nfs4_release_lockowner_release(void *calldata)
4517{
4518 kfree(calldata);
4519}
4520
4521const struct rpc_call_ops nfs4_release_lockowner_ops = {
4522 .rpc_release = nfs4_release_lockowner_release,
4523};
4524
4525void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4526{
4527 struct nfs_server *server = lsp->ls_state->owner->so_server;
4528 struct nfs_release_lockowner_args *args;
4529 struct rpc_message msg = {
4530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4531 };
4532
4533 if (server->nfs_client->cl_mvops->minor_version != 0)
4534 return;
4535 args = kmalloc(sizeof(*args), GFP_NOFS);
4536 if (!args)
4537 return;
4538 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4539 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4540 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4541 msg.rpc_argp = args;
4542 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4543}
4544
aa1870af
BF		 4545#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4546
64c2ce8b
AK		 4547static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4548 const void *buf, size_t buflen,
4549 int flags, int type)
6b3b5496 4550{
64c2ce8b
AK		 4551 if (strcmp(key, "") != 0)
4552 return -EINVAL;
4b580ee3 4553
64c2ce8b 4554 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4555}
4556
64c2ce8b
AK		 4557static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4558 void *buf, size_t buflen, int type)
6b3b5496 4559{
64c2ce8b
AK		 4560 if (strcmp(key, "") != 0)
4561 return -EINVAL;
aa1870af 4562
64c2ce8b 4563 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4564}
4565
64c2ce8b
AK		 4566static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4567 size_t list_len, const char *name,
4568 size_t name_len, int type)
6b3b5496 4569{
64c2ce8b 4570 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4571
096455a2
BF		 4572 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4573 return 0;
64c2ce8b
AK		 4574
4575 if (list && len <= list_len)
4576 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4577 return len;
6b3b5496
BF		 4578}
4579
69aaaae1
TM		 4580static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4581{
4582 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4583 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4584 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4585 return;
4586
4587 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4588 NFS_ATTR_FATTR_NLINK;
4589 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4590 fattr->nlink = 2;
4591}
4592
56659e99 4593int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4594 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4595{
4596 struct nfs_server *server = NFS_SERVER(dir);
4597 u32 bitmask[2] = {
361e624f
MN		 4598 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4599 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4600 };
4601 struct nfs4_fs_locations_arg args = {
4602 .dir_fh = NFS_FH(dir),
c228fd3a 4603 .name = name,
683b57b4
TM		 4604 .page = page,
4605 .bitmask = bitmask,
4606 };
22958463
BH		 4607 struct nfs4_fs_locations_res res = {
4608 .fs_locations = fs_locations,
4609 };
683b57b4
TM		 4610 struct rpc_message msg = {
4611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4612 .rpc_argp = &args,
22958463 4613 .rpc_resp = &res,
683b57b4
TM		 4614 };
4615 int status;
4616
3110ff80 4617 dprintk("%s: start\n", __func__);
c228fd3a 4618 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4619 fs_locations->server = server;
830b8e33 4620 fs_locations->nlocations = 0;
cccef3b9 4621 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4622 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4623 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4624 return status;
4625}
4626
557134a3 4627#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4628/*
4629 * Check the exchange flags returned by the server for invalid flags, having
4630 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4631 * DS flags set.
4632 */
4633static int nfs4_check_cl_exchange_flags(u32 flags)
4634{
4635 if (flags & ~EXCHGID4_FLAG_MASK_R)
4636 goto out_inval;
4637 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4638 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4639 goto out_inval;
4640 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4641 goto out_inval;
4642 return NFS_OK;
4643out_inval:
4644 return -NFS4ERR_INVAL;
4645}
4646
99fe60d0
BH		 4647/*
4648 * nfs4_proc_exchange_id()
4649 *
4650 * Since the clientid has expired, all compounds using sessions
4651 * associated with the stale clientid will be returning
4652 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4653 * be in some phase of session reset.
4654 */
4d643d1d 4655int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4656{
4657 nfs4_verifier verifier;
4658 struct nfs41_exchange_id_args args = {
4659 .client = clp,
357f54d6 4660 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4661 };
4662 struct nfs41_exchange_id_res res = {
4663 .client = clp,
4664 };
4665 int status;
4666 struct rpc_message msg = {
4667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4668 .rpc_argp = &args,
4669 .rpc_resp = &res,
4670 .rpc_cred = cred,
4671 };
4672 __be32 *p;
4673
4674 dprintk("--> %s\n", __func__);
4675 BUG_ON(clp == NULL);
a7b72103 4676
99fe60d0
BH		 4677 p = (u32 *)verifier.data;
4678 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4679 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4680 args.verifier = &verifier;
4681
c7a360b0
AA		 4682 args.id_len = scnprintf(args.id, sizeof(args.id),
4683 "%s/%s.%s/%u",
4684 clp->cl_ipaddr,
4685 init_utsname()->nodename,
4686 init_utsname()->domainname,
4687 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4688
c7a360b0
AA		 4689 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4690 if (!status)
4691 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4692 dprintk("<-- %s status= %d\n", __func__, status);
4693 return status;
4694}
4695
2050f0cc
AA		 4696struct nfs4_get_lease_time_data {
4697 struct nfs4_get_lease_time_args *args;
4698 struct nfs4_get_lease_time_res *res;
4699 struct nfs_client *clp;
4700};
4701
4702static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4703 void *calldata)
4704{
4705 int ret;
4706 struct nfs4_get_lease_time_data *data =
4707 (struct nfs4_get_lease_time_data *)calldata;
4708
4709 dprintk("--> %s\n", __func__);
689cf5c1 4710 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4711 /* just setup sequence, do not trigger session recovery
4712 since we're invoked within one */
4713 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4714 &data->args->la_seq_args,
4715 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4716
4717 BUG_ON(ret == -EAGAIN);
4718 rpc_call_start(task);
4719 dprintk("<-- %s\n", __func__);
4720}
4721
4722/*
4723 * Called from nfs4_state_manager thread for session setup, so don't recover
4724 * from sequence operation or clientid errors.
4725 */
4726static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4727{
4728 struct nfs4_get_lease_time_data *data =
4729 (struct nfs4_get_lease_time_data *)calldata;
4730
4731 dprintk("--> %s\n", __func__);
14516c3a
TM		 4732 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4733 return;
2050f0cc
AA		 4734 switch (task->tk_status) {
4735 case -NFS4ERR_DELAY:
4736 case -NFS4ERR_GRACE:
4737 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4738 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4739 task->tk_status = 0;
0110ee15 4740 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4741 return;
4742 }
2050f0cc
AA		 4743 dprintk("<-- %s\n", __func__);
4744}
4745
4746struct rpc_call_ops nfs4_get_lease_time_ops = {
4747 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4748 .rpc_call_done = nfs4_get_lease_time_done,
4749};
4750
4751int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4752{
4753 struct rpc_task *task;
4754 struct nfs4_get_lease_time_args args;
4755 struct nfs4_get_lease_time_res res = {
4756 .lr_fsinfo = fsinfo,
4757 };
4758 struct nfs4_get_lease_time_data data = {
4759 .args = &args,
4760 .res = &res,
4761 .clp = clp,
4762 };
4763 struct rpc_message msg = {
4764 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4765 .rpc_argp = &args,
4766 .rpc_resp = &res,
4767 };
4768 struct rpc_task_setup task_setup = {
4769 .rpc_client = clp->cl_rpcclient,
4770 .rpc_message = &msg,
4771 .callback_ops = &nfs4_get_lease_time_ops,
4772 .callback_data = &data
4773 };
4774 int status;
4775
2050f0cc
AA		 4776 dprintk("--> %s\n", __func__);
4777 task = rpc_run_task(&task_setup);
4778
4779 if (IS_ERR(task))
4780 status = PTR_ERR(task);
4781 else {
4782 status = task->tk_status;
4783 rpc_put_task(task);
4784 }
4785 dprintk("<-- %s return %d\n", __func__, status);
4786
4787 return status;
4788}
4789
b73dafa7
RL		 4790/*
4791 * Reset a slot table
4792 */
104aeba4
AA		 4793static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4794 int ivalue)
ac72b7b3 4795{
104aeba4 4796 struct nfs4_slot *new = NULL;
b73dafa7 4797 int i;
ac72b7b3
AA		 4798 int ret = 0;
4799
104aeba4
AA		 4800 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4801 max_reqs, tbl->max_slots);
ac72b7b3 4802
104aeba4
AA		 4803 /* Does the newly negotiated max_reqs match the existing slot table? */
4804 if (max_reqs != tbl->max_slots) {
4805 ret = -ENOMEM;
4806 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4807 GFP_NOFS);
104aeba4
AA		 4808 if (!new)
4809 goto out;
4810 ret = 0;
4811 kfree(tbl->slots);
ac72b7b3
AA		 4812 }
4813 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4814 if (new) {
4815 tbl->slots = new;
4816 tbl->max_slots = max_reqs;
4817 }
4818 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4819 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4820 spin_unlock(&tbl->slot_tbl_lock);
4821 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4822 tbl, tbl->slots, tbl->max_slots);
4823out:
4824 dprintk("<-- %s: return %d\n", __func__, ret);
4825 return ret;
4826}
4827
b73dafa7
RL		 4828/*
4829 * Reset the forechannel and backchannel slot tables
4830 */
4831static int nfs4_reset_slot_tables(struct nfs4_session *session)
4832{
4833 int status;
4834
4835 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4836 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4837 if (status)
4838 return status;
4839
4840 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4841 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4842 return status;
4843}
4844
f8625a6a
RL		 4845/* Destroy the slot table */
4846static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4847{
4848 if (session->fc_slot_table.slots != NULL) {
4849 kfree(session->fc_slot_table.slots);
4850 session->fc_slot_table.slots = NULL;
4851 }
4852 if (session->bc_slot_table.slots != NULL) {
4853 kfree(session->bc_slot_table.slots);
4854 session->bc_slot_table.slots = NULL;
4855 }
4856 return;
4857}
4858
fc931582
AA		 4859/*
4860 * Initialize slot table
4861 */
050047ce
RL		 4862static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4863 int max_slots, int ivalue)
fc931582 4864{
fc931582
AA		 4865 struct nfs4_slot *slot;
4866 int ret = -ENOMEM;
4867
4868 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4869
050047ce 4870 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4871
8535b2be 4872 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4873 if (!slot)
4874 goto out;
fc931582
AA		 4875 ret = 0;
4876
4877 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4878 tbl->max_slots = max_slots;
4879 tbl->slots = slot;
4880 tbl->highest_used_slotid = -1; /* no slot is currently used */
4881 spin_unlock(&tbl->slot_tbl_lock);
4882 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4883 tbl, tbl->slots, tbl->max_slots);
4884out:
4885 dprintk("<-- %s: return %d\n", __func__, ret);
4886 return ret;
fc931582
AA		 4887}
4888
050047ce
RL		 4889/*
4890 * Initialize the forechannel and backchannel tables
4891 */
4892static int nfs4_init_slot_tables(struct nfs4_session *session)
4893{
f26468fb
TM		 4894 struct nfs4_slot_table *tbl;
4895 int status = 0;
050047ce 4896
f26468fb
TM		 4897 tbl = &session->fc_slot_table;
4898 if (tbl->slots == NULL) {
4899 status = nfs4_init_slot_table(tbl,
4900 session->fc_attrs.max_reqs, 1);
4901 if (status)
4902 return status;
4903 }
050047ce 4904
f26468fb
TM		 4905 tbl = &session->bc_slot_table;
4906 if (tbl->slots == NULL) {
4907 status = nfs4_init_slot_table(tbl,
4908 session->bc_attrs.max_reqs, 0);
4909 if (status)
4910 nfs4_destroy_slot_tables(session);
4911 }
f8625a6a
RL		 4912
4913 return status;
557134a3
AA		 4914}
4915
4916struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4917{
4918 struct nfs4_session *session;
4919 struct nfs4_slot_table *tbl;
4920
8535b2be 4921 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4922 if (!session)
4923 return NULL;
76db6d95 4924
557134a3 4925 tbl = &session->fc_slot_table;
9dfdf404 4926 tbl->highest_used_slotid = -1;
557134a3 4927 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4928 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 4929 init_completion(&tbl->complete);
f8625a6a
RL		 4930
4931 tbl = &session->bc_slot_table;
9dfdf404 4932 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4933 spin_lock_init(&tbl->slot_tbl_lock);
4934 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 4935 init_completion(&tbl->complete);
f8625a6a 4936
1055d76d
TM		 4937 session->session_state = 1<<NFS4_SESSION_INITING;
4938
557134a3
AA		 4939 session->clp = clp;
4940 return session;
4941}
4942
4943void nfs4_destroy_session(struct nfs4_session *session)
4944{
5a0ffe54
AA		 4945 nfs4_proc_destroy_session(session);
4946 dprintk("%s Destroy backchannel for xprt %p\n",
4947 __func__, session->clp->cl_rpcclient->cl_xprt);
4948 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4949 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4950 nfs4_destroy_slot_tables(session);
557134a3
AA		 4951 kfree(session);
4952}
4953
fc931582
AA		 4954/*
4955 * Initialize the values to be used by the client in CREATE_SESSION
4956 * If nfs4_init_session set the fore channel request and response sizes,
4957 * use them.
4958 *
4959 * Set the back channel max_resp_sz_cached to zero to force the client to
4960 * always set csa_cachethis to FALSE because the current implementation
4961 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4962 */
4963static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4964{
4965 struct nfs4_session *session = args->client->cl_session;
4966 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4967 mxresp_sz = session->fc_attrs.max_resp_sz;
4968
4969 if (mxrqst_sz == 0)
4970 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4971 if (mxresp_sz == 0)
4972 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4973 /* Fore channel attributes */
4974 args->fc_attrs.headerpadsz = 0;
4975 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4976 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4977 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4978 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4979
4980 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4981 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4982 __func__,
4983 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4984 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4985
4986 /* Back channel attributes */
4987 args->bc_attrs.headerpadsz = 0;
4988 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4989 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4990 args->bc_attrs.max_resp_sz_cached = 0;
4991 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4992 args->bc_attrs.max_reqs = 1;
4993
4994 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4995 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4996 __func__,
4997 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4998 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4999 args->bc_attrs.max_reqs);
5000}
5001
43c2e885 5002static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5003{
43c2e885
BF		 5004 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5005 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5006
5007 if (rcvd->headerpadsz > sent->headerpadsz)
5008 return -EINVAL;
5009 if (rcvd->max_resp_sz > sent->max_resp_sz)
5010 return -EINVAL;
5011 /*
5012 * Our requested max_ops is the minimum we need; we're not
5013 * prepared to break up compounds into smaller pieces than that.
5014 * So, no point even trying to continue if the server won't
5015 * cooperate:
5016 */
5017 if (rcvd->max_ops < sent->max_ops)
5018 return -EINVAL;
5019 if (rcvd->max_reqs == 0)
5020 return -EINVAL;
5021 return 0;
8d35301d
AA		 5022}
5023
43c2e885
BF		 5024static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5025{
5026 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5027 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5028
43c2e885
BF		 5029 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5030 return -EINVAL;
5031 if (rcvd->max_resp_sz < sent->max_resp_sz)
5032 return -EINVAL;
5033 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5034 return -EINVAL;
5035 /* These would render the backchannel useless: */
5036 if (rcvd->max_ops == 0)
5037 return -EINVAL;
5038 if (rcvd->max_reqs == 0)
5039 return -EINVAL;
5040 return 0;
5041}
8d35301d 5042
8d35301d
AA		 5043static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5044 struct nfs4_session *session)
5045{
43c2e885 5046 int ret;
8d35301d 5047
43c2e885
BF		 5048 ret = nfs4_verify_fore_channel_attrs(args, session);
5049 if (ret)
5050 return ret;
5051 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5052}
5053
fc931582
AA		 5054static int _nfs4_proc_create_session(struct nfs_client *clp)
5055{
5056 struct nfs4_session *session = clp->cl_session;
5057 struct nfs41_create_session_args args = {
5058 .client = clp,
5059 .cb_program = NFS4_CALLBACK,
5060 };
5061 struct nfs41_create_session_res res = {
5062 .client = clp,
5063 };
5064 struct rpc_message msg = {
5065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5066 .rpc_argp = &args,
5067 .rpc_resp = &res,
5068 };
5069 int status;
5070
5071 nfs4_init_channel_attrs(&args);
0f91421e 5072 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5073
5074 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5075
8d35301d
AA		 5076 if (!status)
5077 /* Verify the session's negotiated channel_attrs values */
5078 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5079 if (!status) {
5080 /* Increment the clientid slot sequence id */
5081 clp->cl_seqid++;
5082 }
5083
5084 return status;
5085}
5086
5087/*
5088 * Issues a CREATE_SESSION operation to the server.
5089 * It is the responsibility of the caller to verify the session is
5090 * expired before calling this routine.
5091 */
f26468fb 5092int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5093{
5094 int status;
5095 unsigned *ptr;
fc931582 5096 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5097 long timeout = 0;
5098 int err;
fc931582
AA		 5099
5100 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5101
7d6d63d6
RL		 5102 do {
5103 status = _nfs4_proc_create_session(clp);
5104 if (status == -NFS4ERR_DELAY) {
5105 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5106 if (err)
5107 status = err;
5108 }
5109 } while (status == -NFS4ERR_DELAY);
5110
fc931582
AA		 5111 if (status)
5112 goto out;
5113
f26468fb
TM		 5114 /* Init and reset the fore channel */
5115 status = nfs4_init_slot_tables(session);
5116 dprintk("slot table initialization returned %d\n", status);
5117 if (status)
5118 goto out;
5119 status = nfs4_reset_slot_tables(session);
5120 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5121 if (status)
5122 goto out;
5123
5124 ptr = (unsigned *)&session->sess_id.data[0];
5125 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5126 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5127out:
5128 dprintk("<-- %s\n", __func__);
5129 return status;
5130}
5131
0f3e66c6
AA		 5132/*
5133 * Issue the over-the-wire RPC DESTROY_SESSION.
5134 * The caller must serialize access to this routine.
5135 */
5136int nfs4_proc_destroy_session(struct nfs4_session *session)
5137{
5138 int status = 0;
5139 struct rpc_message msg;
5140
5141 dprintk("--> nfs4_proc_destroy_session\n");
5142
5143 /* session is still being setup */
5144 if (session->clp->cl_cons_state != NFS_CS_READY)
5145 return status;
5146
5147 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5148 msg.rpc_argp = session;
5149 msg.rpc_resp = NULL;
5150 msg.rpc_cred = NULL;
5151 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5152
5153 if (status)
5154 printk(KERN_WARNING
5155 "Got error %d from the server on DESTROY_SESSION. "
5156 "Session has been destroyed regardless...\n", status);
5157
5158 dprintk("<-- nfs4_proc_destroy_session\n");
5159 return status;
5160}
5161
fccba804
TM		 5162int nfs4_init_session(struct nfs_server *server)
5163{
5164 struct nfs_client *clp = server->nfs_client;
2449ea2e 5165 struct nfs4_session *session;
68bf05ef 5166 unsigned int rsize, wsize;
fccba804
TM		 5167 int ret;
5168
5169 if (!nfs4_has_session(clp))
5170 return 0;
5171
1055d76d
TM		 5172 session = clp->cl_session;
5173 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5174 return 0;
5175
68bf05ef
AA		 5176 rsize = server->rsize;
5177 if (rsize == 0)
5178 rsize = NFS_MAX_FILE_IO_SIZE;
5179 wsize = server->wsize;
5180 if (wsize == 0)
5181 wsize = NFS_MAX_FILE_IO_SIZE;
5182
68bf05ef
AA		 5183 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5184 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5185
fccba804
TM		 5186 ret = nfs4_recover_expired_lease(server);
5187 if (!ret)
5188 ret = nfs4_check_client_ready(clp);
5189 return ret;
5190}
5191
d83217c1
AA		 5192int nfs4_init_ds_session(struct nfs_client *clp)
5193{
5194 struct nfs4_session *session = clp->cl_session;
5195 int ret;
5196
5197 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5198 return 0;
5199
5200 ret = nfs4_client_recover_expired_lease(clp);
5201 if (!ret)
5202 /* Test for the DS role */
5203 if (!is_ds_client(clp))
5204 ret = -ENODEV;
5205 if (!ret)
5206 ret = nfs4_check_client_ready(clp);
5207 return ret;
5208
5209}
5210EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5211
5212
fc01cea9
AA		 5213/*
5214 * Renew the cl_session lease.
5215 */
d5f8d3fe
TM		 5216struct nfs4_sequence_data {
5217 struct nfs_client *clp;
5218 struct nfs4_sequence_args args;
5219 struct nfs4_sequence_res res;
5220};
5221
dc96aef9
AB		 5222static void nfs41_sequence_release(void *data)
5223{
d5f8d3fe
TM		 5224 struct nfs4_sequence_data *calldata = data;
5225 struct nfs_client *clp = calldata->clp;
dc96aef9 5226
7135840f
AB		 5227 if (atomic_read(&clp->cl_count) > 1)
5228 nfs4_schedule_state_renewal(clp);
5229 nfs_put_client(clp);
d5f8d3fe 5230 kfree(calldata);
dc96aef9
AB		 5231}
5232
aa5190d0
TM		 5233static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5234{
5235 switch(task->tk_status) {
5236 case -NFS4ERR_DELAY:
aa5190d0
TM		 5237 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5238 return -EAGAIN;
5239 default:
0400a6b0 5240 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5241 }
5242 return 0;
5243}
5244
dc96aef9 5245static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5246{
d5f8d3fe
TM		 5247 struct nfs4_sequence_data *calldata = data;
5248 struct nfs_client *clp = calldata->clp;
fc01cea9 5249
14516c3a
TM		 5250 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5251 return;
fc01cea9
AA		 5252
5253 if (task->tk_status < 0) {
5254 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5255 if (atomic_read(&clp->cl_count) == 1)
5256 goto out;
fc01cea9 5257
aa5190d0
TM		 5258 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5259 rpc_restart_call_prepare(task);
fc01cea9
AA		 5260 return;
5261 }
5262 }
fc01cea9 5263 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5264out:
fc01cea9
AA		 5265 dprintk("<-- %s\n", __func__);
5266}
5267
5268static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5269{
d5f8d3fe
TM		 5270 struct nfs4_sequence_data *calldata = data;
5271 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5272 struct nfs4_sequence_args *args;
5273 struct nfs4_sequence_res *res;
5274
fc01cea9
AA		 5275 args = task->tk_msg.rpc_argp;
5276 res = task->tk_msg.rpc_resp;
5277
035168ab 5278 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5279 return;
5280 rpc_call_start(task);
5281}
5282
5283static const struct rpc_call_ops nfs41_sequence_ops = {
5284 .rpc_call_done = nfs41_sequence_call_done,
5285 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5286 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5287};
5288
71ac6da9 5289static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5290{
d5f8d3fe 5291 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5292 struct rpc_message msg = {
5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5294 .rpc_cred = cred,
5295 };
71ac6da9
TM		 5296 struct rpc_task_setup task_setup_data = {
5297 .rpc_client = clp->cl_rpcclient,
5298 .rpc_message = &msg,
5299 .callback_ops = &nfs41_sequence_ops,
5300 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5301 };
fc01cea9 5302
7135840f 5303 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5304 return ERR_PTR(-EIO);
dfb4f309 5305 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5306 if (calldata == NULL) {
7135840f 5307 nfs_put_client(clp);
71ac6da9 5308 return ERR_PTR(-ENOMEM);
fc01cea9 5309 }
d5f8d3fe
TM		 5310 msg.rpc_argp = &calldata->args;
5311 msg.rpc_resp = &calldata->res;
5312 calldata->clp = clp;
71ac6da9 5313 task_setup_data.callback_data = calldata;
fc01cea9 5314
71ac6da9
TM		 5315 return rpc_run_task(&task_setup_data);
5316}
5317
5318static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5319{
5320 struct rpc_task *task;
5321 int ret = 0;
5322
5323 task = _nfs41_proc_sequence(clp, cred);
5324 if (IS_ERR(task))
5325 ret = PTR_ERR(task);
5326 else
bf294b41 5327 rpc_put_task_async(task);
71ac6da9
TM		 5328 dprintk("<-- %s status=%d\n", __func__, ret);
5329 return ret;
5330}
5331
5332static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5333{
5334 struct rpc_task *task;
5335 int ret;
5336
5337 task = _nfs41_proc_sequence(clp, cred);
5338 if (IS_ERR(task)) {
5339 ret = PTR_ERR(task);
5340 goto out;
5341 }
5342 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5343 if (!ret) {
5344 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5345
5346 if (task->tk_status == 0)
5347 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5348 ret = task->tk_status;
b4410c2f 5349 }
71ac6da9
TM		 5350 rpc_put_task(task);
5351out:
5352 dprintk("<-- %s status=%d\n", __func__, ret);
5353 return ret;
fc01cea9
AA		 5354}
5355
fce5c838
RL		 5356struct nfs4_reclaim_complete_data {
5357 struct nfs_client *clp;
5358 struct nfs41_reclaim_complete_args arg;
5359 struct nfs41_reclaim_complete_res res;
5360};
5361
5362static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5363{
5364 struct nfs4_reclaim_complete_data *calldata = data;
5365
b257957e 5366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5367 if (nfs41_setup_sequence(calldata->clp->cl_session,
5368 &calldata->arg.seq_args,
fce5c838
RL		 5369 &calldata->res.seq_res, 0, task))
5370 return;
5371
5372 rpc_call_start(task);
5373}
5374
aa5190d0
TM		 5375static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5376{
5377 switch(task->tk_status) {
5378 case 0:
5379 case -NFS4ERR_COMPLETE_ALREADY:
5380 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5381 break;
5382 case -NFS4ERR_DELAY:
aa5190d0
TM		 5383 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5384 return -EAGAIN;
5385 default:
0400a6b0 5386 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5387 }
5388 return 0;
5389}
5390
fce5c838
RL		 5391static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5392{
5393 struct nfs4_reclaim_complete_data *calldata = data;
5394 struct nfs_client *clp = calldata->clp;
5395 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5396
5397 dprintk("--> %s\n", __func__);
14516c3a
TM		 5398 if (!nfs41_sequence_done(task, res))
5399 return;
fce5c838 5400
aa5190d0
TM		 5401 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5402 rpc_restart_call_prepare(task);
5403 return;
5404 }
fce5c838
RL		 5405 dprintk("<-- %s\n", __func__);
5406}
5407
5408static void nfs4_free_reclaim_complete_data(void *data)
5409{
5410 struct nfs4_reclaim_complete_data *calldata = data;
5411
5412 kfree(calldata);
5413}
5414
5415static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5416 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5417 .rpc_call_done = nfs4_reclaim_complete_done,
5418 .rpc_release = nfs4_free_reclaim_complete_data,
5419};
5420
5421/*
5422 * Issue a global reclaim complete.
5423 */
5424static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5425{
5426 struct nfs4_reclaim_complete_data *calldata;
5427 struct rpc_task *task;
5428 struct rpc_message msg = {
5429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5430 };
5431 struct rpc_task_setup task_setup_data = {
5432 .rpc_client = clp->cl_rpcclient,
5433 .rpc_message = &msg,
5434 .callback_ops = &nfs4_reclaim_complete_call_ops,
5435 .flags = RPC_TASK_ASYNC,
5436 };
5437 int status = -ENOMEM;
5438
5439 dprintk("--> %s\n", __func__);
8535b2be 5440 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5441 if (calldata == NULL)
5442 goto out;
5443 calldata->clp = clp;
5444 calldata->arg.one_fs = 0;
fce5c838
RL		 5445
5446 msg.rpc_argp = &calldata->arg;
5447 msg.rpc_resp = &calldata->res;
5448 task_setup_data.callback_data = calldata;
5449 task = rpc_run_task(&task_setup_data);
acf82b85 5450 if (IS_ERR(task)) {
fce5c838 5451 status = PTR_ERR(task);
acf82b85
DC		 5452 goto out;
5453 }
c34c32ea
AA		 5454 status = nfs4_wait_for_completion_rpc_task(task);
5455 if (status == 0)
5456 status = task->tk_status;
fce5c838 5457 rpc_put_task(task);
acf82b85 5458 return 0;
fce5c838
RL		 5459out:
5460 dprintk("<-- %s status=%d\n", __func__, status);
5461 return status;
5462}
b1f69b75
AA		 5463
5464static void
5465nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5466{
5467 struct nfs4_layoutget *lgp = calldata;
c31663d4 5468 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5469
5470 dprintk("--> %s\n", __func__);
c31663d4
FI		 5471 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5472 * right now covering the LAYOUTGET we are about to send.
5473 * However, that is not so catastrophic, and there seems
5474 * to be no way to prevent it completely.
5475 */
b1f69b75
AA		 5476 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5477 &lgp->res.seq_res, 0, task))
5478 return;
cf7d63f1
FI		 5479 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5480 NFS_I(lgp->args.inode)->layout,
5481 lgp->args.ctx->state)) {
5482 rpc_exit(task, NFS4_OK);
5483 return;
5484 }
b1f69b75
AA		 5485 rpc_call_start(task);
5486}
5487
5488static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5489{
5490 struct nfs4_layoutget *lgp = calldata;
5491 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5492
5493 dprintk("--> %s\n", __func__);
5494
5495 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5496 return;
5497
5498 switch (task->tk_status) {
5499 case 0:
5500 break;
5501 case -NFS4ERR_LAYOUTTRYLATER:
5502 case -NFS4ERR_RECALLCONFLICT:
5503 task->tk_status = -NFS4ERR_DELAY;
5504 /* Fall through */
5505 default:
5506 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5507 rpc_restart_call_prepare(task);
5508 return;
5509 }
5510 }
b1f69b75
AA		 5511 dprintk("<-- %s\n", __func__);
5512}
5513
5514static void nfs4_layoutget_release(void *calldata)
5515{
5516 struct nfs4_layoutget *lgp = calldata;
5517
5518 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5519 if (lgp->res.layout.buf != NULL)
5520 free_page((unsigned long) lgp->res.layout.buf);
5521 put_nfs_open_context(lgp->args.ctx);
5522 kfree(calldata);
5523 dprintk("<-- %s\n", __func__);
5524}
5525
5526static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5527 .rpc_call_prepare = nfs4_layoutget_prepare,
5528 .rpc_call_done = nfs4_layoutget_done,
5529 .rpc_release = nfs4_layoutget_release,
5530};
5531
5532int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5533{
5534 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5535 struct rpc_task *task;
5536 struct rpc_message msg = {
5537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5538 .rpc_argp = &lgp->args,
5539 .rpc_resp = &lgp->res,
5540 };
5541 struct rpc_task_setup task_setup_data = {
5542 .rpc_client = server->client,
5543 .rpc_message = &msg,
5544 .callback_ops = &nfs4_layoutget_call_ops,
5545 .callback_data = lgp,
5546 .flags = RPC_TASK_ASYNC,
5547 };
5548 int status = 0;
5549
5550 dprintk("--> %s\n", __func__);
5551
5552 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5553 if (lgp->res.layout.buf == NULL) {
5554 nfs4_layoutget_release(lgp);
5555 return -ENOMEM;
5556 }
5557
5558 lgp->res.seq_res.sr_slot = NULL;
5559 task = rpc_run_task(&task_setup_data);
5560 if (IS_ERR(task))
5561 return PTR_ERR(task);
5562 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5563 if (status == 0)
5564 status = task->tk_status;
5565 if (status == 0)
5566 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5567 rpc_put_task(task);
5568 dprintk("<-- %s status=%d\n", __func__, status);
5569 return status;
5570}
5571
5572static int
5573_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5574{
5575 struct nfs4_getdeviceinfo_args args = {
5576 .pdev = pdev,
5577 };
5578 struct nfs4_getdeviceinfo_res res = {
5579 .pdev = pdev,
5580 };
5581 struct rpc_message msg = {
5582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5583 .rpc_argp = &args,
5584 .rpc_resp = &res,
5585 };
5586 int status;
5587
5588 dprintk("--> %s\n", __func__);
5589 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5590 dprintk("<-- %s status=%d\n", __func__, status);
5591
5592 return status;
5593}
5594
5595int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5596{
5597 struct nfs4_exception exception = { };
5598 int err;
5599
5600 do {
5601 err = nfs4_handle_exception(server,
5602 _nfs4_proc_getdeviceinfo(server, pdev),
5603 &exception);
5604 } while (exception.retry);
5605 return err;
5606}
5607EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5608
557134a3
AA		 5609#endif /* CONFIG_NFS_V4_1 */
5610
591d71cb 5611struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5612 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5613 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5614 .recover_open = nfs4_open_reclaim,
5615 .recover_lock = nfs4_lock_reclaim,
591d71cb 5616 .establish_clid = nfs4_init_clientid,
90a16617 5617 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5618};
5619
591d71cb
AA		 5620#if defined(CONFIG_NFS_V4_1)
5621struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5622 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5623 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5624 .recover_open = nfs4_open_reclaim,
5625 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5626 .establish_clid = nfs41_init_clientid,
b4b82607 5627 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5628 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5629};
5630#endif /* CONFIG_NFS_V4_1 */
5631
5632struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5633 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5634 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5635 .recover_open = nfs4_open_expired,
5636 .recover_lock = nfs4_lock_expired,
5637 .establish_clid = nfs4_init_clientid,
90a16617 5638 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5639};
5640
5641#if defined(CONFIG_NFS_V4_1)
5642struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5643 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5644 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5645 .recover_open = nfs4_open_expired,
5646 .recover_lock = nfs4_lock_expired,
4d643d1d 5647 .establish_clid = nfs41_init_clientid,
b4b82607 5648 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5649};
591d71cb 5650#endif /* CONFIG_NFS_V4_1 */
1da177e4 5651
29fba38b
BH		 5652struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5653 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5654 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5655 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5656};
5657
5658#if defined(CONFIG_NFS_V4_1)
5659struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5660 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5661 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5662 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5663};
5664#endif
5665
97dc1359
TM		 5666static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5667 .minor_version = 0,
5668 .call_sync = _nfs4_call_sync,
e047a10c 5669 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5670 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5671 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5672 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5673};
5674
5675#if defined(CONFIG_NFS_V4_1)
5676static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5677 .minor_version = 1,
5678 .call_sync = _nfs4_call_sync_session,
e047a10c 5679 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5680 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5681 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5682 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5683};
5684#endif
5685
97dc1359
TM		 5686const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5687 [0] = &nfs_v4_0_minor_ops,
5688#if defined(CONFIG_NFS_V4_1)
5689 [1] = &nfs_v4_1_minor_ops,
5690#endif
5691};
5692
92e1d5be 5693static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5694 .permission = nfs_permission,
5695 .getattr = nfs_getattr,
5696 .setattr = nfs_setattr,
64c2ce8b
AK		 5697 .getxattr = generic_getxattr,
5698 .setxattr = generic_setxattr,
5699 .listxattr = generic_listxattr,
5700 .removexattr = generic_removexattr,
6b3b5496
BF		 5701};
5702
509de811 5703const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5704 .version = 4, /* protocol version */
5705 .dentry_ops = &nfs4_dentry_operations,
5706 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5707 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5708 .getroot = nfs4_proc_get_root,
5709 .getattr = nfs4_proc_getattr,
5710 .setattr = nfs4_proc_setattr,
2b3de441 5711 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5712 .lookup = nfs4_proc_lookup,
5713 .access = nfs4_proc_access,
5714 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5715 .create = nfs4_proc_create,
5716 .remove = nfs4_proc_remove,
5717 .unlink_setup = nfs4_proc_unlink_setup,
5718 .unlink_done = nfs4_proc_unlink_done,
5719 .rename = nfs4_proc_rename,
d3d4152a
JL		 5720 .rename_setup = nfs4_proc_rename_setup,
5721 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5722 .link = nfs4_proc_link,
5723 .symlink = nfs4_proc_symlink,
5724 .mkdir = nfs4_proc_mkdir,
5725 .rmdir = nfs4_proc_remove,
5726 .readdir = nfs4_proc_readdir,
5727 .mknod = nfs4_proc_mknod,
5728 .statfs = nfs4_proc_statfs,
5729 .fsinfo = nfs4_proc_fsinfo,
5730 .pathconf = nfs4_proc_pathconf,
e9326dca 5731 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5732 .decode_dirent = nfs4_decode_dirent,
5733 .read_setup = nfs4_proc_read_setup,
ec06c096 5734 .read_done = nfs4_read_done,
1da177e4 5735 .write_setup = nfs4_proc_write_setup,
788e7a89 5736 .write_done = nfs4_write_done,
1da177e4 5737 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5738 .commit_done = nfs4_commit_done,
1da177e4 5739 .lock = nfs4_proc_lock,
e50a1c2e 5740 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5741 .close_context = nfs4_close_context,
2b484297 5742 .open_context = nfs4_atomic_open,
45a52a02 5743 .init_client = nfs4_init_client,
1da177e4
LT		 5744};
5745
64c2ce8b
AK		 5746static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5747 .prefix = XATTR_NAME_NFSV4_ACL,
5748 .list = nfs4_xattr_list_nfs4_acl,
5749 .get = nfs4_xattr_get_nfs4_acl,
5750 .set = nfs4_xattr_set_nfs4_acl,
5751};
5752
5753const struct xattr_handler *nfs4_xattr_handlers[] = {
5754 &nfs4_xattr_nfs4_acl_handler,
5755 NULL
5756};
5757
1da177e4
LT		 5758/*
5759 * Local variables:
5760 * c-basic-offset: 8
5761 * End:
5762 */
Linux 6.x block layer and io_uring tree(s)