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