projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1: filelayout read
[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;
88 default:
1da177e4 89 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 90 __func__, -err);
52567b03 91 break;
1da177e4 92 }
52567b03 93 return -EIO;
1da177e4
LT		 94}
95
96/*
97 * This is our standard bitmap for GETATTR requests.
98 */
99const u32 nfs4_fattr_bitmap[2] = {
100 FATTR4_WORD0_TYPE
101 | FATTR4_WORD0_CHANGE
102 | FATTR4_WORD0_SIZE
103 | FATTR4_WORD0_FSID
104 | FATTR4_WORD0_FILEID,
105 FATTR4_WORD1_MODE
106 | FATTR4_WORD1_NUMLINKS
107 | FATTR4_WORD1_OWNER
108 | FATTR4_WORD1_OWNER_GROUP
109 | FATTR4_WORD1_RAWDEV
110 | FATTR4_WORD1_SPACE_USED
111 | FATTR4_WORD1_TIME_ACCESS
112 | FATTR4_WORD1_TIME_METADATA
113 | FATTR4_WORD1_TIME_MODIFY
114};
115
116const u32 nfs4_statfs_bitmap[2] = {
117 FATTR4_WORD0_FILES_AVAIL
118 | FATTR4_WORD0_FILES_FREE
119 | FATTR4_WORD0_FILES_TOTAL,
120 FATTR4_WORD1_SPACE_AVAIL
121 | FATTR4_WORD1_SPACE_FREE
122 | FATTR4_WORD1_SPACE_TOTAL
123};
124
4ce79717 125const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 126 FATTR4_WORD0_MAXLINK
127 | FATTR4_WORD0_MAXNAME,
128 0
129};
130
131const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
132 | FATTR4_WORD0_MAXREAD
133 | FATTR4_WORD0_MAXWRITE
134 | FATTR4_WORD0_LEASE_TIME,
55b6e774 135 FATTR4_WORD1_TIME_DELTA
504913fb 136 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 137};
138
830b8e33
MN		 139const u32 nfs4_fs_locations_bitmap[2] = {
140 FATTR4_WORD0_TYPE
141 | FATTR4_WORD0_CHANGE
142 | FATTR4_WORD0_SIZE
143 | FATTR4_WORD0_FSID
144 | FATTR4_WORD0_FILEID
145 | FATTR4_WORD0_FS_LOCATIONS,
146 FATTR4_WORD1_MODE
147 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY
155 | FATTR4_WORD1_MOUNTED_ON_FILEID
156};
157
bc4785cd 158static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 159 struct nfs4_readdir_arg *readdir)
160{
0dbb4c67 161 __be32 *start, *p;
1da177e4
LT		 162
163 BUG_ON(readdir->count < 80);
164 if (cookie > 2) {
b7ef1956 165 readdir->cookie = cookie;
1da177e4
LT		 166 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
167 return;
168 }
169
170 readdir->cookie = 0;
171 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
172 if (cookie == 2)
173 return;
174
175 /*
176 * NFSv4 servers do not return entries for '.' and '..'
177 * Therefore, we fake these entries here. We let '.'
178 * have cookie 0 and '..' have cookie 1. Note that
179 * when talking to the server, we always send cookie 0
180 * instead of 1 or 2.
181 */
0dbb4c67 182 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 183
184 if (cookie == 0) {
185 *p++ = xdr_one; /* next */
186 *p++ = xdr_zero; /* cookie, first word */
187 *p++ = xdr_one; /* cookie, second word */
188 *p++ = xdr_one; /* entry len */
189 memcpy(p, ".\0\0\0", 4); /* entry */
190 p++;
191 *p++ = xdr_one; /* bitmap length */
192 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
193 *p++ = htonl(8); /* attribute buffer length */
4e769b93 194 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 195 }
196
197 *p++ = xdr_one; /* next */
198 *p++ = xdr_zero; /* cookie, first word */
199 *p++ = xdr_two; /* cookie, second word */
200 *p++ = xdr_two; /* entry len */
201 memcpy(p, "..\0\0", 4); /* entry */
202 p++;
203 *p++ = xdr_one; /* bitmap length */
204 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
205 *p++ = htonl(8); /* attribute buffer length */
4e769b93 206 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 207
208 readdir->pgbase = (char *)p - (char *)start;
209 readdir->count -= readdir->pgbase;
210 kunmap_atomic(start, KM_USER0);
211}
212
65de872e
TM		 213static int nfs4_wait_clnt_recover(struct nfs_client *clp)
214{
215 int res;
216
217 might_sleep();
218
e005e804 219 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 220 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 221 return res;
222}
223
224static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
225{
226 int res = 0;
227
228 might_sleep();
229
230 if (*timeout <= 0)
231 *timeout = NFS4_POLL_RETRY_MIN;
232 if (*timeout > NFS4_POLL_RETRY_MAX)
233 *timeout = NFS4_POLL_RETRY_MAX;
234 schedule_timeout_killable(*timeout);
235 if (fatal_signal_pending(current))
236 res = -ERESTARTSYS;
237 *timeout <<= 1;
238 return res;
239}
240
241/* This is the error handling routine for processes that are allowed
242 * to sleep.
243 */
244static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
245{
246 struct nfs_client *clp = server->nfs_client;
9e33bed5 247 struct nfs4_state *state = exception->state;
65de872e
TM		 248 int ret = errorcode;
249
250 exception->retry = 0;
251 switch(errorcode) {
252 case 0:
253 return 0;
9e33bed5
TM		 254 case -NFS4ERR_ADMIN_REVOKED:
255 case -NFS4ERR_BAD_STATEID:
256 case -NFS4ERR_OPENMODE:
257 if (state == NULL)
258 break;
0400a6b0
TM		 259 nfs4_schedule_stateid_recovery(server, state);
260 goto wait_on_recovery;
65de872e 261 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 262 case -NFS4ERR_STALE_CLIENTID:
65de872e 263 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 264 nfs4_schedule_lease_recovery(clp);
265 goto wait_on_recovery;
03391693 266#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 267 case -NFS4ERR_BADSESSION:
268 case -NFS4ERR_BADSLOT:
269 case -NFS4ERR_BAD_HIGH_SLOT:
270 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
271 case -NFS4ERR_DEADSESSION:
272 case -NFS4ERR_SEQ_FALSE_RETRY:
273 case -NFS4ERR_SEQ_MISORDERED:
274 dprintk("%s ERROR: %d Reset session\n", __func__,
275 errorcode);
0400a6b0 276 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 277 exception->retry = 1;
b9179237 278 break;
03391693 279#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 280 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 281 if (exception->timeout > HZ) {
282 /* We have retried a decent amount, time to
283 * fail
284 */
285 ret = -EBUSY;
286 break;
287 }
65de872e
TM		 288 case -NFS4ERR_GRACE:
289 case -NFS4ERR_DELAY:
2c643488 290 case -EKEYEXPIRED:
65de872e
TM		 291 ret = nfs4_delay(server->client, &exception->timeout);
292 if (ret != 0)
293 break;
294 case -NFS4ERR_OLD_STATEID:
295 exception->retry = 1;
296 }
297 /* We failed to handle the error */
298 return nfs4_map_errors(ret);
0400a6b0 299wait_on_recovery:
a2c0b9e2
TM		 300 ret = nfs4_wait_clnt_recover(clp);
301 if (ret == 0)
302 exception->retry = 1;
303 return ret;
65de872e
TM		 304}
305
306
452e9352 307static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 308{
1da177e4
LT		 309 spin_lock(&clp->cl_lock);
310 if (time_before(clp->cl_last_renewal,timestamp))
311 clp->cl_last_renewal = timestamp;
312 spin_unlock(&clp->cl_lock);
313}
314
452e9352
TM		 315static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
316{
317 do_renew_lease(server->nfs_client, timestamp);
318}
319
cccef3b9
AA		 320#if defined(CONFIG_NFS_V4_1)
321
e2c4ab3c
AA		 322/*
323 * nfs4_free_slot - free a slot and efficiently update slot table.
324 *
325 * freeing a slot is trivially done by clearing its respective bit
326 * in the bitmap.
327 * If the freed slotid equals highest_used_slotid we want to update it
328 * so that the server would be able to size down the slot table if needed,
329 * otherwise we know that the highest_used_slotid is still in use.
330 * When updating highest_used_slotid there may be "holes" in the bitmap
331 * so we need to scan down from highest_used_slotid to 0 looking for the now
332 * highest slotid in use.
333 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 334 *
335 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 336 */
337static void
dfb4f309 338nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 339{
dfb4f309 340 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 341 int slotid = free_slotid;
342
dfb4f309 343 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 344 /* clear used bit in bitmap */
345 __clear_bit(slotid, tbl->used_slots);
346
347 /* update highest_used_slotid when it is freed */
348 if (slotid == tbl->highest_used_slotid) {
349 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 350 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 351 tbl->highest_used_slotid = slotid;
352 else
353 tbl->highest_used_slotid = -1;
354 }
e2c4ab3c
AA		 355 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
356 free_slotid, tbl->highest_used_slotid);
357}
358
3bfb0fc5 359/*
42acd021 360 * Signal state manager thread if session fore channel is drained
3bfb0fc5 361 */
42acd021 362static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 363{
689cf5c1
AB		 364 struct rpc_task *task;
365
a2118c33 366 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 367 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
368 if (task)
369 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 370 return;
371 }
372
373 if (ses->fc_slot_table.highest_used_slotid != -1)
374 return;
375
42acd021
AA		 376 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
377 complete(&ses->fc_slot_table.complete);
378}
379
380/*
381 * Signal state manager thread if session back channel is drained
382 */
383void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
384{
385 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
386 ses->bc_slot_table.highest_used_slotid != -1)
387 return;
388 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
389 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 390}
391
d185a334 392static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 393{
394 struct nfs4_slot_table *tbl;
395
d185a334 396 tbl = &res->sr_session->fc_slot_table;
dfb4f309 397 if (!res->sr_slot) {
13615871
AA		 398 /* just wake up the next guy waiting since
399 * we may have not consumed a slot after all */
691daf3b 400 dprintk("%s: No slot\n", __func__);
35dc1d74 401 return;
13615871 402 }
ea028ac9 403
35dc1d74 404 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 405 nfs4_free_slot(tbl, res->sr_slot);
42acd021 406 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 407 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 408 res->sr_slot = NULL;
13615871
AA		 409}
410
14516c3a 411static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 412{
413 unsigned long timestamp;
14516c3a 414 struct nfs_client *clp;
b0df806c
AA		 415
416 /*
417 * sr_status remains 1 if an RPC level error occurred. The server
418 * may or may not have processed the sequence operation..
419 * Proceed as if the server received and processed the sequence
420 * operation.
421 */
422 if (res->sr_status == 1)
423 res->sr_status = NFS_OK;
424
425 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 426 if (!res->sr_slot)
b0df806c
AA		 427 goto out;
428
691daf3b 429 /* Check the SEQUENCE operation status */
14516c3a
TM		 430 switch (res->sr_status) {
431 case 0:
b0df806c 432 /* Update the slot's sequence and clientid lease timer */
dfb4f309 433 ++res->sr_slot->seq_nr;
b0df806c 434 timestamp = res->sr_renewal_time;
14516c3a 435 clp = res->sr_session->clp;
452e9352 436 do_renew_lease(clp, timestamp);
0629e370 437 /* Check sequence flags */
b4410c2f
TM		 438 if (res->sr_status_flags != 0)
439 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 440 break;
441 case -NFS4ERR_DELAY:
442 /* The server detected a resend of the RPC call and
443 * returned NFS4ERR_DELAY as per Section 2.10.6.2
444 * of RFC5661.
445 */
12364a4f 446 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 447 __func__,
448 res->sr_slot - res->sr_session->fc_slot_table.slots,
449 res->sr_slot->seq_nr);
14516c3a
TM		 450 goto out_retry;
451 default:
452 /* Just update the slot sequence no. */
dfb4f309 453 ++res->sr_slot->seq_nr;
b0df806c
AA		 454 }
455out:
456 /* The session may be reset by one of the error handlers. */
457 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 458 nfs41_sequence_free_slot(res);
14516c3a
TM		 459 return 1;
460out_retry:
d05dd4e9 461 if (!rpc_restart_call(task))
14516c3a
TM		 462 goto out;
463 rpc_delay(task, NFS4_POLL_RETRY_MAX);
464 return 0;
b0df806c
AA		 465}
466
14516c3a
TM		 467static int nfs4_sequence_done(struct rpc_task *task,
468 struct nfs4_sequence_res *res)
df896455 469{
14516c3a
TM		 470 if (res->sr_session == NULL)
471 return 1;
472 return nfs41_sequence_done(task, res);
df896455
TM		 473}
474
510b8175
BH		 475/*
476 * nfs4_find_slot - efficiently look for a free slot
477 *
478 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
479 * If found, we mark the slot as used, update the highest_used_slotid,
480 * and respectively set up the sequence operation args.
481 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 482 *
483 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 484 */
485static u8
40ead580 486nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 487{
488 int slotid;
489 u8 ret_id = NFS4_MAX_SLOT_TABLE;
490 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
491
510b8175
BH		 492 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
493 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
494 tbl->max_slots);
495 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
496 if (slotid >= tbl->max_slots)
497 goto out;
498 __set_bit(slotid, tbl->used_slots);
499 if (slotid > tbl->highest_used_slotid)
500 tbl->highest_used_slotid = slotid;
501 ret_id = slotid;
502out:
503 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
504 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 505 return ret_id;
506}
507
dc70d7b3 508int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 509 struct nfs4_sequence_args *args,
510 struct nfs4_sequence_res *res,
511 int cache_reply,
512 struct rpc_task *task)
513{
fbcd4abc
AA		 514 struct nfs4_slot *slot;
515 struct nfs4_slot_table *tbl;
516 u8 slotid;
517
518 dprintk("--> %s\n", __func__);
ce5039c1 519 /* slot already allocated? */
dfb4f309 520 if (res->sr_slot != NULL)
ce5039c1
AA		 521 return 0;
522
fbcd4abc
AA		 523 tbl = &session->fc_slot_table;
524
525 spin_lock(&tbl->slot_tbl_lock);
a2118c33 526 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 527 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 528 /*
529 * The state manager will wait until the slot table is empty.
530 * Schedule the reset thread
531 */
05f0d236 532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 533 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 534 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 535 return -EAGAIN;
b069d94a
AA		 536 }
537
689cf5c1
AB		 538 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
539 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
540 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
541 spin_unlock(&tbl->slot_tbl_lock);
542 dprintk("%s enforce FIFO order\n", __func__);
543 return -EAGAIN;
544 }
545
40ead580 546 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 547 if (slotid == NFS4_MAX_SLOT_TABLE) {
548 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
549 spin_unlock(&tbl->slot_tbl_lock);
550 dprintk("<-- %s: no free slots\n", __func__);
551 return -EAGAIN;
552 }
553 spin_unlock(&tbl->slot_tbl_lock);
554
689cf5c1 555 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 556 slot = tbl->slots + slotid;
99fe60d0 557 args->sa_session = session;
fbcd4abc
AA		 558 args->sa_slotid = slotid;
559 args->sa_cache_this = cache_reply;
560
561 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
562
99fe60d0 563 res->sr_session = session;
dfb4f309 564 res->sr_slot = slot;
fbcd4abc 565 res->sr_renewal_time = jiffies;
2a6e26cd 566 res->sr_status_flags = 0;
fbcd4abc
AA		 567 /*
568 * sr_status is only set in decode_sequence, and so will remain
569 * set to 1 if an rpc level failure occurs.
570 */
571 res->sr_status = 1;
ce5039c1
AA		 572 return 0;
573}
dc70d7b3 574EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 575
035168ab 576int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 577 struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res,
579 int cache_reply,
580 struct rpc_task *task)
581{
035168ab 582 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 583 int ret = 0;
584
035168ab
TM		 585 if (session == NULL) {
586 args->sa_session = NULL;
587 res->sr_session = NULL;
588 goto out;
589 }
590
12364a4f 591 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 592 __func__, session->clp, session, res->sr_slot ?
593 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 594
035168ab 595 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 596 task);
ce5039c1
AA		 597out:
598 dprintk("<-- %s status=%d\n", __func__, ret);
599 return ret;
600}
601
602struct nfs41_call_sync_data {
035168ab 603 const struct nfs_server *seq_server;
ce5039c1
AA		 604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606 int cache_reply;
607};
608
609static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
610{
611 struct nfs41_call_sync_data *data = calldata;
612
035168ab
TM		 613 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
614
615 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 616 data->seq_res, data->cache_reply, task))
617 return;
618 rpc_call_start(task);
619}
620
b257957e
AB		 621static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
622{
623 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
624 nfs41_call_sync_prepare(task, calldata);
625}
626
69ab40c4
AA		 627static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
628{
629 struct nfs41_call_sync_data *data = calldata;
630
14516c3a 631 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 632}
633
ce5039c1
AA		 634struct rpc_call_ops nfs41_call_sync_ops = {
635 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 636 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 637};
638
b257957e
AB		 639struct rpc_call_ops nfs41_call_priv_sync_ops = {
640 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
641 .rpc_call_done = nfs41_call_sync_done,
642};
643
035168ab 644static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 645 struct rpc_message *msg,
646 struct nfs4_sequence_args *args,
647 struct nfs4_sequence_res *res,
b257957e
AB		 648 int cache_reply,
649 int privileged)
ce5039c1
AA		 650{
651 int ret;
652 struct rpc_task *task;
653 struct nfs41_call_sync_data data = {
035168ab 654 .seq_server = server,
ce5039c1
AA		 655 .seq_args = args,
656 .seq_res = res,
657 .cache_reply = cache_reply,
658 };
659 struct rpc_task_setup task_setup = {
035168ab 660 .rpc_client = server->client,
ce5039c1
AA		 661 .rpc_message = msg,
662 .callback_ops = &nfs41_call_sync_ops,
663 .callback_data = &data
664 };
665
dfb4f309 666 res->sr_slot = NULL;
b257957e
AB		 667 if (privileged)
668 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 669 task = rpc_run_task(&task_setup);
670 if (IS_ERR(task))
671 ret = PTR_ERR(task);
672 else {
673 ret = task->tk_status;
674 rpc_put_task(task);
675 }
676 return ret;
677}
678
cccef3b9
AA		 679int _nfs4_call_sync_session(struct nfs_server *server,
680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
683 int cache_reply)
684{
035168ab 685 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 686}
687
df896455 688#else
14516c3a
TM		 689static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
df896455 691{
14516c3a 692 return 1;
df896455 693}
cccef3b9
AA		 694#endif /* CONFIG_NFS_V4_1 */
695
696int _nfs4_call_sync(struct nfs_server *server,
697 struct rpc_message *msg,
698 struct nfs4_sequence_args *args,
699 struct nfs4_sequence_res *res,
700 int cache_reply)
701{
f3752975 702 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 703 return rpc_call_sync(server->client, msg, 0);
704}
705
706#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 707 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 708 &(res)->seq_res, (cache_reply))
709
38478b24 710static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 711{
38478b24 712 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 713
38478b24 714 spin_lock(&dir->i_lock);
40d24704
TM		 715 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
716 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 717 nfs_force_lookup_revalidate(dir);
40d24704 718 nfsi->change_attr = cinfo->after;
38478b24 719 spin_unlock(&dir->i_lock);
1da177e4
LT		 720}
721
e56e0b78 722struct nfs4_opendata {
c6d00e63 723 struct kref kref;
e56e0b78
TM		 724 struct nfs_openargs o_arg;
725 struct nfs_openres o_res;
cdd4e68b
TM		 726 struct nfs_open_confirmargs c_arg;
727 struct nfs_open_confirmres c_res;
e56e0b78
TM		 728 struct nfs_fattr f_attr;
729 struct nfs_fattr dir_attr;
ad389da7 730 struct path path;
e56e0b78
TM		 731 struct dentry *dir;
732 struct nfs4_state_owner *owner;
aac00a8d 733 struct nfs4_state *state;
e56e0b78 734 struct iattr attrs;
26e976a8 735 unsigned long timestamp;
3e309914 736 unsigned int rpc_done : 1;
24ac23ab
TM		 737 int rpc_status;
738 int cancelled;
e56e0b78
TM		 739};
740
2ced46c2
TM		 741
742static void nfs4_init_opendata_res(struct nfs4_opendata *p)
743{
744 p->o_res.f_attr = &p->f_attr;
745 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 746 p->o_res.seqid = p->o_arg.seqid;
747 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 748 p->o_res.server = p->o_arg.server;
749 nfs_fattr_init(&p->f_attr);
750 nfs_fattr_init(&p->dir_attr);
751}
752
ad389da7 753static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 754 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 755 const struct iattr *attrs,
756 gfp_t gfp_mask)
e56e0b78 757{
ad389da7 758 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 759 struct inode *dir = parent->d_inode;
760 struct nfs_server *server = NFS_SERVER(dir);
761 struct nfs4_opendata *p;
762
8535b2be 763 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 764 if (p == NULL)
765 goto err;
8535b2be 766 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 767 if (p->o_arg.seqid == NULL)
768 goto err_free;
f6948697
AV		 769 path_get(path);
770 p->path = *path;
e56e0b78
TM		 771 p->dir = parent;
772 p->owner = sp;
773 atomic_inc(&sp->so_count);
774 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 775 p->o_arg.open_flags = flags;
776 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 777 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 778 p->o_arg.id = sp->so_owner_id.id;
ad389da7 779 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 780 p->o_arg.server = server;
781 p->o_arg.bitmask = server->attr_bitmask;
782 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 783 if (flags & O_CREAT) {
784 u32 *s;
785
e56e0b78
TM		 786 p->o_arg.u.attrs = &p->attrs;
787 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 788 s = (u32 *) p->o_arg.u.verifier.data;
789 s[0] = jiffies;
790 s[1] = current->pid;
e56e0b78 791 }
cdd4e68b
TM		 792 p->c_arg.fh = &p->o_res.fh;
793 p->c_arg.stateid = &p->o_res.stateid;
794 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 795 nfs4_init_opendata_res(p);
c6d00e63 796 kref_init(&p->kref);
e56e0b78
TM		 797 return p;
798err_free:
799 kfree(p);
800err:
801 dput(parent);
802 return NULL;
803}
804
c6d00e63 805static void nfs4_opendata_free(struct kref *kref)
e56e0b78 806{
c6d00e63
TM		 807 struct nfs4_opendata *p = container_of(kref,
808 struct nfs4_opendata, kref);
809
810 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 811 if (p->state != NULL)
812 nfs4_put_open_state(p->state);
c6d00e63
TM		 813 nfs4_put_state_owner(p->owner);
814 dput(p->dir);
31f31db1 815 path_put(&p->path);
c6d00e63
TM		 816 kfree(p);
817}
818
819static void nfs4_opendata_put(struct nfs4_opendata *p)
820{
821 if (p != NULL)
822 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 823}
824
06f814a3
TM		 825static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
826{
06f814a3
TM		 827 int ret;
828
06f814a3 829 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 830 return ret;
831}
832
dc0b027d 833static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 834{
835 int ret = 0;
dc0b027d
TM		 836
837 if (open_mode & O_EXCL)
838 goto out;
839 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 840 case FMODE_READ:
88069f77
TM		 841 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
842 && state->n_rdonly != 0;
6ee41268
TM		 843 break;
844 case FMODE_WRITE:
88069f77
TM		 845 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
846 && state->n_wronly != 0;
6ee41268
TM		 847 break;
848 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 849 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
850 && state->n_rdwr != 0;
6ee41268 851 }
dc0b027d 852out:
6ee41268
TM		 853 return ret;
854}
855
dc0b027d 856static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 857{
dc0b027d 858 if ((delegation->type & fmode) != fmode)
aac00a8d 859 return 0;
15c831bf 860 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 861 return 0;
b7391f44 862 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 863 return 1;
864}
865
dc0b027d 866static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 867{
dc0b027d 868 switch (fmode) {
e7616923
TM		 869 case FMODE_WRITE:
870 state->n_wronly++;
871 break;
872 case FMODE_READ:
873 state->n_rdonly++;
874 break;
875 case FMODE_READ|FMODE_WRITE:
876 state->n_rdwr++;
877 }
dc0b027d 878 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 879}
880
dc0b027d 881static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 882{
883 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
884 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
885 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 886 switch (fmode) {
003707c7
TM		 887 case FMODE_READ:
888 set_bit(NFS_O_RDONLY_STATE, &state->flags);
889 break;
890 case FMODE_WRITE:
891 set_bit(NFS_O_WRONLY_STATE, &state->flags);
892 break;
893 case FMODE_READ|FMODE_WRITE:
894 set_bit(NFS_O_RDWR_STATE, &state->flags);
895 }
e7616923
TM		 896}
897
dc0b027d 898static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 899{
8bda4e4c 900 write_seqlock(&state->seqlock);
dc0b027d 901 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 902 write_sequnlock(&state->seqlock);
003707c7
TM		 903}
904
dc0b027d 905static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 906{
8bda4e4c
TM		 907 /*
908 * Protect the call to nfs4_state_set_mode_locked and
909 * serialise the stateid update
910 */
911 write_seqlock(&state->seqlock);
003707c7
TM		 912 if (deleg_stateid != NULL) {
913 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
914 set_bit(NFS_DELEGATED_STATE, &state->flags);
915 }
916 if (open_stateid != NULL)
dc0b027d 917 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 918 write_sequnlock(&state->seqlock);
919 spin_lock(&state->owner->so_lock);
dc0b027d 920 update_open_stateflags(state, fmode);
ec073428 921 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 922}
923
dc0b027d 924static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 925{
926 struct nfs_inode *nfsi = NFS_I(state->inode);
927 struct nfs_delegation *deleg_cur;
928 int ret = 0;
929
dc0b027d 930 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 931
932 rcu_read_lock();
933 deleg_cur = rcu_dereference(nfsi->delegation);
934 if (deleg_cur == NULL)
935 goto no_delegation;
936
937 spin_lock(&deleg_cur->lock);
938 if (nfsi->delegation != deleg_cur ||
dc0b027d 939 (deleg_cur->type & fmode) != fmode)
34310430
TM		 940 goto no_delegation_unlock;
941
942 if (delegation == NULL)
943 delegation = &deleg_cur->stateid;
944 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
945 goto no_delegation_unlock;
946
b7391f44 947 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 948 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 949 ret = 1;
950no_delegation_unlock:
951 spin_unlock(&deleg_cur->lock);
952no_delegation:
953 rcu_read_unlock();
954
955 if (!ret && open_stateid != NULL) {
dc0b027d 956 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 957 ret = 1;
958 }
959
960 return ret;
961}
962
963
dc0b027d 964static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 965{
966 struct nfs_delegation *delegation;
967
968 rcu_read_lock();
969 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 970 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 971 rcu_read_unlock();
972 return;
973 }
974 rcu_read_unlock();
975 nfs_inode_return_delegation(inode);
976}
977
6ee41268 978static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 979{
980 struct nfs4_state *state = opendata->state;
981 struct nfs_inode *nfsi = NFS_I(state->inode);
982 struct nfs_delegation *delegation;
dc0b027d
TM		 983 int open_mode = opendata->o_arg.open_flags & O_EXCL;
984 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 985 nfs4_stateid stateid;
986 int ret = -EAGAIN;
987
aac00a8d 988 for (;;) {
dc0b027d 989 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 990 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 991 if (can_open_cached(state, fmode, open_mode)) {
992 update_open_stateflags(state, fmode);
6ee41268 993 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 994 goto out_return_state;
995 }
996 spin_unlock(&state->owner->so_lock);
997 }
34310430
TM		 998 rcu_read_lock();
999 delegation = rcu_dereference(nfsi->delegation);
1000 if (delegation == NULL ||
dc0b027d 1001 !can_open_delegated(delegation, fmode)) {
34310430 1002 rcu_read_unlock();
aac00a8d 1003 break;
34310430 1004 }
aac00a8d
TM		 1005 /* Save the delegation */
1006 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1007 rcu_read_unlock();
af22f94a 1008 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1009 if (ret != 0)
1010 goto out;
1011 ret = -EAGAIN;
34310430
TM		 1012
1013 /* Try to update the stateid using the delegation */
dc0b027d 1014 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1015 goto out_return_state;
aac00a8d 1016 }
aac00a8d
TM		 1017out:
1018 return ERR_PTR(ret);
1019out_return_state:
1020 atomic_inc(&state->count);
1021 return state;
1022}
1023
24ac23ab
TM		 1024static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1025{
1026 struct inode *inode;
1027 struct nfs4_state *state = NULL;
003707c7 1028 struct nfs_delegation *delegation;
1b370bc2 1029 int ret;
24ac23ab 1030
aac00a8d 1031 if (!data->rpc_done) {
6ee41268 1032 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1033 goto out;
1034 }
1035
1b370bc2 1036 ret = -EAGAIN;
24ac23ab 1037 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1038 goto err;
24ac23ab 1039 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1040 ret = PTR_ERR(inode);
03f28e3a 1041 if (IS_ERR(inode))
1b370bc2
TM		 1042 goto err;
1043 ret = -ENOMEM;
24ac23ab
TM		 1044 state = nfs4_get_open_state(inode, data->owner);
1045 if (state == NULL)
1b370bc2 1046 goto err_put_inode;
549d6ed5 1047 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1048 int delegation_flags = 0;
1049
003707c7
TM		 1050 rcu_read_lock();
1051 delegation = rcu_dereference(NFS_I(inode)->delegation);
1052 if (delegation)
1053 delegation_flags = delegation->flags;
1054 rcu_read_unlock();
15c831bf 1055 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1056 nfs_inode_set_delegation(state->inode,
1057 data->owner->so_cred,
1058 &data->o_res);
1059 else
1060 nfs_inode_reclaim_delegation(state->inode,
1061 data->owner->so_cred,
1062 &data->o_res);
1063 }
34310430
TM		 1064
1065 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1066 data->o_arg.fmode);
24ac23ab 1067 iput(inode);
aac00a8d 1068out:
24ac23ab 1069 return state;
1b370bc2
TM		 1070err_put_inode:
1071 iput(inode);
1072err:
1073 return ERR_PTR(ret);
24ac23ab
TM		 1074}
1075
864472e9
TM		 1076static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1077{
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_open_context *ctx;
1080
1081 spin_lock(&state->inode->i_lock);
1082 list_for_each_entry(ctx, &nfsi->open_files, list) {
1083 if (ctx->state != state)
1084 continue;
1085 get_nfs_open_context(ctx);
1086 spin_unlock(&state->inode->i_lock);
1087 return ctx;
1088 }
1089 spin_unlock(&state->inode->i_lock);
1090 return ERR_PTR(-ENOENT);
1091}
1092
6f220ed5
TM		 1093static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1094{
1095 struct nfs4_opendata *opendata;
1096
8535b2be 1097 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1098 if (opendata == NULL)
1099 return ERR_PTR(-ENOMEM);
1100 opendata->state = state;
1101 atomic_inc(&state->count);
1102 return opendata;
1103}
1104
dc0b027d 1105static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1106{
2ced46c2 1107 struct nfs4_state *newstate;
864472e9
TM		 1108 int ret;
1109
dc0b027d
TM		 1110 opendata->o_arg.open_flags = 0;
1111 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1112 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1113 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1114 nfs4_init_opendata_res(opendata);
b257957e 1115 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1116 if (ret != 0)
1117 return ret;
2ced46c2 1118 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1119 if (IS_ERR(newstate))
1120 return PTR_ERR(newstate);
dc0b027d 1121 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1122 *res = newstate;
864472e9
TM		 1123 return 0;
1124}
1125
1126static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1127{
864472e9 1128 struct nfs4_state *newstate;
864472e9
TM		 1129 int ret;
1130
1131 /* memory barrier prior to reading state->n_* */
2ced46c2 1132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1133 smp_rmb();
1134 if (state->n_rdwr != 0) {
b0ed9dbc 1135 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1136 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1137 if (ret != 0)
1138 return ret;
2ced46c2
TM		 1139 if (newstate != state)
1140 return -ESTALE;
864472e9
TM		 1141 }
1142 if (state->n_wronly != 0) {
b0ed9dbc 1143 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1144 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1145 if (ret != 0)
1146 return ret;
2ced46c2
TM		 1147 if (newstate != state)
1148 return -ESTALE;
864472e9
TM		 1149 }
1150 if (state->n_rdonly != 0) {
b0ed9dbc 1151 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1152 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1153 if (ret != 0)
1154 return ret;
2ced46c2
TM		 1155 if (newstate != state)
1156 return -ESTALE;
864472e9 1157 }
1ac7e2fd
TM		 1158 /*
1159 * We may have performed cached opens for all three recoveries.
1160 * Check if we need to update the current stateid.
1161 */
1162 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1163 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1164 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1166 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1167 write_sequnlock(&state->seqlock);
1ac7e2fd 1168 }
864472e9
TM		 1169 return 0;
1170}
1171
1da177e4
LT		 1172/*
1173 * OPEN_RECLAIM:
1174 * reclaim state on the server after a reboot.
1da177e4 1175 */
539cd03a 1176static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1177{
1ac7e2fd 1178 struct nfs_delegation *delegation;
864472e9 1179 struct nfs4_opendata *opendata;
dc0b027d 1180 fmode_t delegation_type = 0;
1da177e4
LT		 1181 int status;
1182
6f220ed5
TM		 1183 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1184 if (IS_ERR(opendata))
1185 return PTR_ERR(opendata);
864472e9
TM		 1186 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1187 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1188 rcu_read_lock();
1189 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1190 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1191 delegation_type = delegation->type;
1ac7e2fd 1192 rcu_read_unlock();
864472e9
TM		 1193 opendata->o_arg.u.delegation_type = delegation_type;
1194 status = nfs4_open_recover(opendata, state);
c6d00e63 1195 nfs4_opendata_put(opendata);
1da177e4
LT		 1196 return status;
1197}
1198
539cd03a 1199static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1200{
1201 struct nfs_server *server = NFS_SERVER(state->inode);
1202 struct nfs4_exception exception = { };
1203 int err;
1204 do {
539cd03a 1205 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1206 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1207 break;
1208 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1209 } while (exception.retry);
1210 return err;
1211}
1212
864472e9
TM		 1213static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1214{
1215 struct nfs_open_context *ctx;
1216 int ret;
1217
1218 ctx = nfs4_state_find_open_context(state);
1219 if (IS_ERR(ctx))
1220 return PTR_ERR(ctx);
539cd03a 1221 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1222 put_nfs_open_context(ctx);
1223 return ret;
1224}
1225
13437e12 1226static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1227{
e56e0b78 1228 struct nfs4_opendata *opendata;
864472e9 1229 int ret;
1da177e4 1230
6f220ed5
TM		 1231 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1232 if (IS_ERR(opendata))
1233 return PTR_ERR(opendata);
e56e0b78 1234 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1235 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1236 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1237 ret = nfs4_open_recover(opendata, state);
c6d00e63 1238 nfs4_opendata_put(opendata);
864472e9 1239 return ret;
1da177e4
LT		 1240}
1241
13437e12 1242int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1243{
1244 struct nfs4_exception exception = { };
539cd03a 1245 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1246 int err;
1247 do {
13437e12 1248 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1249 switch (err) {
1250 case 0:
965b5d67
TM		 1251 case -ENOENT:
1252 case -ESTALE:
1253 goto out;
bcfa49f6
RL		 1254 case -NFS4ERR_BADSESSION:
1255 case -NFS4ERR_BADSLOT:
1256 case -NFS4ERR_BAD_HIGH_SLOT:
1257 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1258 case -NFS4ERR_DEADSESSION:
0400a6b0 1259 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1260 goto out;
1da177e4
LT		 1261 case -NFS4ERR_STALE_CLIENTID:
1262 case -NFS4ERR_STALE_STATEID:
1263 case -NFS4ERR_EXPIRED:
1264 /* Don't recall a delegation if it was lost */
0400a6b0 1265 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1266 goto out;
1267 case -ERESTARTSYS:
1268 /*
1269 * The show must go on: exit, but mark the
1270 * stateid as needing recovery.
1271 */
1272 case -NFS4ERR_ADMIN_REVOKED:
1273 case -NFS4ERR_BAD_STATEID:
0400a6b0 1274 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1275 case -EKEYEXPIRED:
1276 /*
1277 * User RPCSEC_GSS context has expired.
1278 * We cannot recover this stateid now, so
1279 * skip it and allow recovery thread to
1280 * proceed.
1281 */
965b5d67
TM		 1282 case -ENOMEM:
1283 err = 0;
1284 goto out;
1da177e4
LT		 1285 }
1286 err = nfs4_handle_exception(server, err, &exception);
1287 } while (exception.retry);
965b5d67 1288out:
1da177e4
LT		 1289 return err;
1290}
1291
cdd4e68b
TM		 1292static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1293{
1294 struct nfs4_opendata *data = calldata;
1295
1296 data->rpc_status = task->tk_status;
26e976a8 1297 if (data->rpc_status == 0) {
cdd4e68b
TM		 1298 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1299 sizeof(data->o_res.stateid.data));
bb22629e 1300 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1301 renew_lease(data->o_res.server, data->timestamp);
3e309914 1302 data->rpc_done = 1;
26e976a8 1303 }
cdd4e68b
TM		 1304}
1305
1306static void nfs4_open_confirm_release(void *calldata)
1307{
1308 struct nfs4_opendata *data = calldata;
1309 struct nfs4_state *state = NULL;
1310
1311 /* If this request hasn't been cancelled, do nothing */
1312 if (data->cancelled == 0)
1313 goto out_free;
1314 /* In case of error, no cleanup! */
3e309914 1315 if (!data->rpc_done)
cdd4e68b 1316 goto out_free;
cdd4e68b 1317 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1318 if (!IS_ERR(state))
dc0b027d 1319 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1320out_free:
c6d00e63 1321 nfs4_opendata_put(data);
cdd4e68b
TM		 1322}
1323
1324static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1325 .rpc_call_done = nfs4_open_confirm_done,
1326 .rpc_release = nfs4_open_confirm_release,
1327};
1328
1329/*
1330 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1331 */
1332static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1333{
1334 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1335 struct rpc_task *task;
5138fde0
TM		 1336 struct rpc_message msg = {
1337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1338 .rpc_argp = &data->c_arg,
1339 .rpc_resp = &data->c_res,
1340 .rpc_cred = data->owner->so_cred,
1341 };
c970aa85
TM		 1342 struct rpc_task_setup task_setup_data = {
1343 .rpc_client = server->client,
5138fde0 1344 .rpc_message = &msg,
c970aa85
TM		 1345 .callback_ops = &nfs4_open_confirm_ops,
1346 .callback_data = data,
101070ca 1347 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1348 .flags = RPC_TASK_ASYNC,
1349 };
1da177e4
LT		 1350 int status;
1351
c6d00e63 1352 kref_get(&data->kref);
3e309914
TM		 1353 data->rpc_done = 0;
1354 data->rpc_status = 0;
5138fde0 1355 data->timestamp = jiffies;
c970aa85 1356 task = rpc_run_task(&task_setup_data);
7a1218a2 1357 if (IS_ERR(task))
cdd4e68b 1358 return PTR_ERR(task);
cdd4e68b
TM		 1359 status = nfs4_wait_for_completion_rpc_task(task);
1360 if (status != 0) {
1361 data->cancelled = 1;
1362 smp_wmb();
1363 } else
1364 status = data->rpc_status;
e6b3c4db 1365 rpc_put_task(task);
1da177e4
LT		 1366 return status;
1367}
1368
24ac23ab 1369static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1370{
24ac23ab
TM		 1371 struct nfs4_opendata *data = calldata;
1372 struct nfs4_state_owner *sp = data->owner;
5138fde0 1373
24ac23ab
TM		 1374 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1375 return;
aac00a8d
TM		 1376 /*
1377 * Check if we still need to send an OPEN call, or if we can use
1378 * a delegation instead.
1379 */
1380 if (data->state != NULL) {
1381 struct nfs_delegation *delegation;
1382
dc0b027d 1383 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1384 goto out_no_action;
aac00a8d
TM		 1385 rcu_read_lock();
1386 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1387 if (delegation != NULL &&
15c831bf 1388 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1389 rcu_read_unlock();
6ee41268 1390 goto out_no_action;
aac00a8d
TM		 1391 }
1392 rcu_read_unlock();
1393 }
24ac23ab 1394 /* Update sequence id. */
9f958ab8 1395 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1396 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1397 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1398 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1399 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1400 }
26e976a8 1401 data->timestamp = jiffies;
035168ab 1402 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1403 &data->o_arg.seq_args,
1404 &data->o_res.seq_res, 1, task))
1405 return;
5138fde0 1406 rpc_call_start(task);
6ee41268
TM		 1407 return;
1408out_no_action:
1409 task->tk_action = NULL;
1410
24ac23ab 1411}
1da177e4 1412
b257957e
AB		 1413static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1414{
1415 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1416 nfs4_open_prepare(task, calldata);
1417}
1418
24ac23ab
TM		 1419static void nfs4_open_done(struct rpc_task *task, void *calldata)
1420{
1421 struct nfs4_opendata *data = calldata;
1da177e4 1422
24ac23ab 1423 data->rpc_status = task->tk_status;
d898528c 1424
14516c3a
TM		 1425 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1426 return;
d898528c 1427
24ac23ab
TM		 1428 if (task->tk_status == 0) {
1429 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1430 case S_IFREG:
1431 break;
1432 case S_IFLNK:
24ac23ab 1433 data->rpc_status = -ELOOP;
6f926b5b
TM		 1434 break;
1435 case S_IFDIR:
24ac23ab 1436 data->rpc_status = -EISDIR;
6f926b5b
TM		 1437 break;
1438 default:
24ac23ab 1439 data->rpc_status = -ENOTDIR;
6f926b5b 1440 }
26e976a8 1441 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1442 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1443 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1444 }
3e309914 1445 data->rpc_done = 1;
24ac23ab 1446}
6f926b5b 1447
24ac23ab
TM		 1448static void nfs4_open_release(void *calldata)
1449{
1450 struct nfs4_opendata *data = calldata;
1451 struct nfs4_state *state = NULL;
1452
1453 /* If this request hasn't been cancelled, do nothing */
1454 if (data->cancelled == 0)
1455 goto out_free;
1456 /* In case of error, no cleanup! */
3e309914 1457 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1458 goto out_free;
1459 /* In case we need an open_confirm, no cleanup! */
1460 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1461 goto out_free;
24ac23ab 1462 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1463 if (!IS_ERR(state))
dc0b027d 1464 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1465out_free:
c6d00e63 1466 nfs4_opendata_put(data);
24ac23ab
TM		 1467}
1468
1469static const struct rpc_call_ops nfs4_open_ops = {
1470 .rpc_call_prepare = nfs4_open_prepare,
1471 .rpc_call_done = nfs4_open_done,
1472 .rpc_release = nfs4_open_release,
1473};
1474
b257957e
AB		 1475static const struct rpc_call_ops nfs4_recover_open_ops = {
1476 .rpc_call_prepare = nfs4_recover_open_prepare,
1477 .rpc_call_done = nfs4_open_done,
1478 .rpc_release = nfs4_open_release,
1479};
1480
1481static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1482{
1483 struct inode *dir = data->dir->d_inode;
1484 struct nfs_server *server = NFS_SERVER(dir);
1485 struct nfs_openargs *o_arg = &data->o_arg;
1486 struct nfs_openres *o_res = &data->o_res;
1487 struct rpc_task *task;
5138fde0
TM		 1488 struct rpc_message msg = {
1489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1490 .rpc_argp = o_arg,
1491 .rpc_resp = o_res,
1492 .rpc_cred = data->owner->so_cred,
1493 };
c970aa85
TM		 1494 struct rpc_task_setup task_setup_data = {
1495 .rpc_client = server->client,
5138fde0 1496 .rpc_message = &msg,
c970aa85
TM		 1497 .callback_ops = &nfs4_open_ops,
1498 .callback_data = data,
101070ca 1499 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1500 .flags = RPC_TASK_ASYNC,
1501 };
24ac23ab
TM		 1502 int status;
1503
c6d00e63 1504 kref_get(&data->kref);
3e309914
TM		 1505 data->rpc_done = 0;
1506 data->rpc_status = 0;
2ced46c2 1507 data->cancelled = 0;
b257957e
AB		 1508 if (isrecover)
1509 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1510 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1511 if (IS_ERR(task))
1512 return PTR_ERR(task);
1513 status = nfs4_wait_for_completion_rpc_task(task);
1514 if (status != 0) {
1515 data->cancelled = 1;
1516 smp_wmb();
1517 } else
1518 status = data->rpc_status;
1519 rpc_put_task(task);
1520
1521 return status;
1522}
1523
1524static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1525{
1526 struct inode *dir = data->dir->d_inode;
1527 struct nfs_openres *o_res = &data->o_res;
1528 int status;
1529
1530 status = nfs4_run_open_task(data, 1);
1531 if (status != 0 || !data->rpc_done)
1532 return status;
1533
1534 nfs_refresh_inode(dir, o_res->dir_attr);
1535
1536 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1537 status = _nfs4_proc_open_confirm(data);
1538 if (status != 0)
1539 return status;
1540 }
1541
1542 return status;
1543}
1544
1545/*
1546 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1547 */
1548static int _nfs4_proc_open(struct nfs4_opendata *data)
1549{
1550 struct inode *dir = data->dir->d_inode;
1551 struct nfs_server *server = NFS_SERVER(dir);
1552 struct nfs_openargs *o_arg = &data->o_arg;
1553 struct nfs_openres *o_res = &data->o_res;
1554 int status;
1555
1556 status = nfs4_run_open_task(data, 0);
3e309914 1557 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1558 return status;
1559
56ae19f3
TM		 1560 if (o_arg->open_flags & O_CREAT) {
1561 update_changeattr(dir, &o_res->cinfo);
1562 nfs_post_op_update_inode(dir, o_res->dir_attr);
1563 } else
1564 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1565 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1566 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1567 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1568 status = _nfs4_proc_open_confirm(data);
1da177e4 1569 if (status != 0)
24ac23ab 1570 return status;
1da177e4
LT		 1571 }
1572 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1573 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1574 return 0;
1da177e4
LT		 1575}
1576
d83217c1 1577static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1578{
a78cb57a 1579 unsigned int loop;
6b30954e 1580 int ret;
58d9714a 1581
a78cb57a 1582 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1583 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1584 if (ret != 0)
a78cb57a 1585 break;
e598d843
TM		 1586 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1587 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1588 break;
0400a6b0 1589 nfs4_schedule_state_manager(clp);
a78cb57a 1590 ret = -EIO;
6b30954e 1591 }
a78cb57a 1592 return ret;
58d9714a
TM		 1593}
1594
d83217c1
AA		 1595static int nfs4_recover_expired_lease(struct nfs_server *server)
1596{
1597 return nfs4_client_recover_expired_lease(server->nfs_client);
1598}
1599
1da177e4
LT		 1600/*
1601 * OPEN_EXPIRED:
1602 * reclaim state on the server after a network partition.
1603 * Assumes caller holds the appropriate lock
1604 */
539cd03a 1605static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1606{
e56e0b78 1607 struct nfs4_opendata *opendata;
864472e9 1608 int ret;
1da177e4 1609
6f220ed5
TM		 1610 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1611 if (IS_ERR(opendata))
1612 return PTR_ERR(opendata);
864472e9 1613 ret = nfs4_open_recover(opendata, state);
35d05778 1614 if (ret == -ESTALE)
539cd03a 1615 d_drop(ctx->path.dentry);
c6d00e63 1616 nfs4_opendata_put(opendata);
864472e9 1617 return ret;
1da177e4
LT		 1618}
1619
a9ed2e25 1620static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1621{
539cd03a 1622 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1623 struct nfs4_exception exception = { };
1624 int err;
1625
1626 do {
539cd03a 1627 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1628 switch (err) {
1629 default:
1630 goto out;
1631 case -NFS4ERR_GRACE:
1632 case -NFS4ERR_DELAY:
1633 nfs4_handle_exception(server, err, &exception);
1634 err = 0;
1635 }
202b50dc 1636 } while (exception.retry);
a9ed2e25 1637out:
202b50dc
TM		 1638 return err;
1639}
1640
1da177e4
LT		 1641static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1642{
1da177e4 1643 struct nfs_open_context *ctx;
864472e9 1644 int ret;
1da177e4 1645
864472e9
TM		 1646 ctx = nfs4_state_find_open_context(state);
1647 if (IS_ERR(ctx))
1648 return PTR_ERR(ctx);
539cd03a 1649 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1650 put_nfs_open_context(ctx);
1651 return ret;
1da177e4
LT		 1652}
1653
aa53ed54
JL		 1654/*
1655 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1656 * fields corresponding to attributes that were used to store the verifier.
1657 * Make sure we clobber those fields in the later setattr call
1658 */
1659static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1660{
1661 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1662 !(sattr->ia_valid & ATTR_ATIME_SET))
1663 sattr->ia_valid |= ATTR_ATIME;
1664
1665 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1666 !(sattr->ia_valid & ATTR_MTIME_SET))
1667 sattr->ia_valid |= ATTR_MTIME;
1668}
1669
1da177e4 1670/*
24ac23ab 1671 * Returns a referenced nfs4_state
1da177e4 1672 */
dc0b027d 1673static 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		 1674{
1675 struct nfs4_state_owner *sp;
1676 struct nfs4_state *state = NULL;
1677 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1678 struct nfs4_opendata *opendata;
aac00a8d 1679 int status;
1da177e4
LT		 1680
1681 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1682 status = -ENOMEM;
1683 if (!(sp = nfs4_get_state_owner(server, cred))) {
1684 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1685 goto out_err;
1686 }
58d9714a
TM		 1687 status = nfs4_recover_expired_lease(server);
1688 if (status != 0)
b4454fe1 1689 goto err_put_state_owner;
aac00a8d 1690 if (path->dentry->d_inode != NULL)
dc0b027d 1691 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1692 status = -ENOMEM;
8535b2be 1693 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1694 if (opendata == NULL)
95d35cb4 1695 goto err_put_state_owner;
1da177e4 1696
aac00a8d
TM		 1697 if (path->dentry->d_inode != NULL)
1698 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1699
24ac23ab 1700 status = _nfs4_proc_open(opendata);
1da177e4 1701 if (status != 0)
c6d00e63 1702 goto err_opendata_put;
1da177e4 1703
24ac23ab 1704 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1705 status = PTR_ERR(state);
1706 if (IS_ERR(state))
c6d00e63 1707 goto err_opendata_put;
0df5dd4a 1708 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1709 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1710
1711 if (opendata->o_arg.open_flags & O_EXCL) {
1712 nfs4_exclusive_attrset(opendata, sattr);
1713
1714 nfs_fattr_init(opendata->o_res.f_attr);
1715 status = nfs4_do_setattr(state->inode, cred,
1716 opendata->o_res.f_attr, sattr,
1717 state);
1718 if (status == 0)
1719 nfs_setattr_update_inode(state->inode, sattr);
1720 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1721 }
c6d00e63 1722 nfs4_opendata_put(opendata);
1da177e4 1723 nfs4_put_state_owner(sp);
1da177e4
LT		 1724 *res = state;
1725 return 0;
c6d00e63
TM		 1726err_opendata_put:
1727 nfs4_opendata_put(opendata);
e56e0b78
TM		 1728err_put_state_owner:
1729 nfs4_put_state_owner(sp);
1da177e4 1730out_err:
1da177e4
LT		 1731 *res = NULL;
1732 return status;
1733}
1734
1735
dc0b027d 1736static 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		 1737{
1738 struct nfs4_exception exception = { };
1739 struct nfs4_state *res;
1740 int status;
1741
1742 do {
dc0b027d 1743 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1744 if (status == 0)
1745 break;
1746 /* NOTE: BAD_SEQID means the server and client disagree about the
1747 * book-keeping w.r.t. state-changing operations
1748 * (OPEN/CLOSE/LOCK/LOCKU...)
1749 * It is actually a sign of a bug on the client or on the server.
1750 *
1751 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1752 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1753 * have unhashed the old state_owner for us, and that we can
1754 * therefore safely retry using a new one. We should still warn
1755 * the user though...
1756 */
1757 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1758 printk(KERN_WARNING "NFS: v4 server %s "
1759 " returned a bad sequence-id error!\n",
1760 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1761 exception.retry = 1;
1762 continue;
1763 }
550f5747
TM		 1764 /*
1765 * BAD_STATEID on OPEN means that the server cancelled our
1766 * state before it received the OPEN_CONFIRM.
1767 * Recover by retrying the request as per the discussion
1768 * on Page 181 of RFC3530.
1769 */
1770 if (status == -NFS4ERR_BAD_STATEID) {
1771 exception.retry = 1;
1772 continue;
1773 }
aac00a8d
TM		 1774 if (status == -EAGAIN) {
1775 /* We must have found a delegation */
1776 exception.retry = 1;
1777 continue;
1778 }
1da177e4
LT		 1779 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1780 status, &exception));
1781 } while (exception.retry);
1782 return res;
1783}
1784
659bfcd6
TM		 1785static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1786 struct nfs_fattr *fattr, struct iattr *sattr,
1787 struct nfs4_state *state)
1da177e4 1788{
3e4f6290 1789 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1790 struct nfs_setattrargs arg = {
3e4f6290 1791 .fh = NFS_FH(inode),
1da177e4
LT		 1792 .iap = sattr,
1793 .server = server,
1794 .bitmask = server->attr_bitmask,
1795 };
1796 struct nfs_setattrres res = {
1797 .fattr = fattr,
1798 .server = server,
1799 };
1800 struct rpc_message msg = {
659bfcd6
TM		 1801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1802 .rpc_argp = &arg,
1803 .rpc_resp = &res,
1804 .rpc_cred = cred,
1da177e4 1805 };
26e976a8 1806 unsigned long timestamp = jiffies;
65e4308d 1807 int status;
1da177e4 1808
0e574af1 1809 nfs_fattr_init(fattr);
1da177e4 1810
3e4f6290
TM		 1811 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1812 /* Use that stateid */
1813 } else if (state != NULL) {
77041ed9 1814 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1815 } else
1da177e4
LT		 1816 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1817
cccef3b9 1818 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1819 if (status == 0 && state != NULL)
1820 renew_lease(server, timestamp);
65e4308d 1821 return status;
1da177e4
LT		 1822}
1823
659bfcd6
TM		 1824static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1825 struct nfs_fattr *fattr, struct iattr *sattr,
1826 struct nfs4_state *state)
1da177e4 1827{
3e4f6290 1828 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1829 struct nfs4_exception exception = { };
1830 int err;
1831 do {
1832 err = nfs4_handle_exception(server,
659bfcd6 1833 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1834 &exception);
1835 } while (exception.retry);
1836 return err;
1837}
1838
1839struct nfs4_closedata {
4a35bd41 1840 struct path path;
1da177e4
LT		 1841 struct inode *inode;
1842 struct nfs4_state *state;
1843 struct nfs_closeargs arg;
1844 struct nfs_closeres res;
516a6af6 1845 struct nfs_fattr fattr;
26e976a8 1846 unsigned long timestamp;
f7e8917a
FI		 1847 bool roc;
1848 u32 roc_barrier;
1da177e4
LT		 1849};
1850
963d8fe5 1851static void nfs4_free_closedata(void *data)
9512135d 1852{
963d8fe5
TM		 1853 struct nfs4_closedata *calldata = data;
1854 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1855
f7e8917a
FI		 1856 if (calldata->roc)
1857 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1858 nfs4_put_open_state(calldata->state);
1859 nfs_free_seqid(calldata->arg.seqid);
9512135d 1860 nfs4_put_state_owner(sp);
31f31db1 1861 path_put(&calldata->path);
9512135d
TM		 1862 kfree(calldata);
1863}
1864
88069f77
TM		 1865static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1866 fmode_t fmode)
1867{
1868 spin_lock(&state->owner->so_lock);
1869 if (!(fmode & FMODE_READ))
1870 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1871 if (!(fmode & FMODE_WRITE))
1872 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1873 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1874 spin_unlock(&state->owner->so_lock);
1875}
1876
963d8fe5 1877static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1878{
963d8fe5 1879 struct nfs4_closedata *calldata = data;
1da177e4 1880 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1881 struct nfs_server *server = NFS_SERVER(calldata->inode);
1882
14516c3a
TM		 1883 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1884 return;
1da177e4
LT		 1885 /* hmm. we are done with the inode, and in the process of freeing
1886 * the state_owner. we keep this around to process errors
1887 */
1da177e4
LT		 1888 switch (task->tk_status) {
1889 case 0:
f7e8917a
FI		 1890 if (calldata->roc)
1891 pnfs_roc_set_barrier(state->inode,
1892 calldata->roc_barrier);
45328c35 1893 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1894 renew_lease(server, calldata->timestamp);
88069f77
TM		 1895 nfs4_close_clear_stateid_flags(state,
1896 calldata->arg.fmode);
1da177e4
LT		 1897 break;
1898 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1899 case -NFS4ERR_OLD_STATEID:
1900 case -NFS4ERR_BAD_STATEID:
1da177e4 1901 case -NFS4ERR_EXPIRED:
dc0b027d 1902 if (calldata->arg.fmode == 0)
9e33bed5 1903 break;
1da177e4 1904 default:
72211dbe
TM		 1905 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1906 rpc_restart_call_prepare(task);
1da177e4 1907 }
72211dbe 1908 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1909 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1910}
1911
4ce70ada 1912static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1913{
4ce70ada 1914 struct nfs4_closedata *calldata = data;
9512135d 1915 struct nfs4_state *state = calldata->state;
88069f77 1916 int call_close = 0;
9512135d 1917
963d8fe5 1918 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1919 return;
003707c7 1920
88069f77
TM		 1921 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1922 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1923 spin_lock(&state->owner->so_lock);
003707c7 1924 /* Calculate the change in open mode */
e7616923 1925 if (state->n_rdwr == 0) {
003707c7 1926 if (state->n_rdonly == 0) {
88069f77
TM		 1927 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1928 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1929 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1930 }
1931 if (state->n_wronly == 0) {
88069f77
TM		 1932 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1933 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1934 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1935 }
e7616923 1936 }
4cecb76f 1937 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1938
1939 if (!call_close) {
963d8fe5
TM		 1940 /* Note: exit _without_ calling nfs4_close_done */
1941 task->tk_action = NULL;
9512135d
TM		 1942 return;
1943 }
88069f77 1944
f7e8917a 1945 if (calldata->arg.fmode == 0) {
88069f77 1946 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1947 if (calldata->roc &&
1948 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1949 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1950 task, NULL);
1951 return;
1952 }
1953 }
88069f77 1954
516a6af6 1955 nfs_fattr_init(calldata->res.fattr);
26e976a8 1956 calldata->timestamp = jiffies;
035168ab 1957 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1958 &calldata->arg.seq_args, &calldata->res.seq_res,
1959 1, task))
1960 return;
5138fde0 1961 rpc_call_start(task);
1da177e4
LT		 1962}
1963
963d8fe5 1964static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1965 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1966 .rpc_call_done = nfs4_close_done,
1967 .rpc_release = nfs4_free_closedata,
1968};
1969
1da177e4
LT		 1970/*
1971 * It is possible for data to be read/written from a mem-mapped file
1972 * after the sys_close call (which hits the vfs layer as a flush).
1973 * This means that we can't safely call nfsv4 close on a file until
1974 * the inode is cleared. This in turn means that we are not good
1975 * NFSv4 citizens - we do not indicate to the server to update the file's
1976 * share state even when we are done with one of the three share
1977 * stateid's in the inode.
1978 *
1979 * NOTE: Caller must be holding the sp->so_owner semaphore!
1980 */
f7e8917a 1981int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 1982{
4a35bd41 1983 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1984 struct nfs4_closedata *calldata;
b39e625b
TM		 1985 struct nfs4_state_owner *sp = state->owner;
1986 struct rpc_task *task;
5138fde0
TM		 1987 struct rpc_message msg = {
1988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1989 .rpc_cred = state->owner->so_cred,
1990 };
c970aa85
TM		 1991 struct rpc_task_setup task_setup_data = {
1992 .rpc_client = server->client,
5138fde0 1993 .rpc_message = &msg,
c970aa85 1994 .callback_ops = &nfs4_close_ops,
101070ca 1995 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1996 .flags = RPC_TASK_ASYNC,
1997 };
9512135d 1998 int status = -ENOMEM;
1da177e4 1999
8535b2be 2000 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2001 if (calldata == NULL)
9512135d 2002 goto out;
4a35bd41 2003 calldata->inode = state->inode;
1da177e4 2004 calldata->state = state;
4a35bd41 2005 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2006 calldata->arg.stateid = &state->open_stateid;
1da177e4 2007 /* Serialization for the sequence id */
8535b2be 2008 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2009 if (calldata->arg.seqid == NULL)
2010 goto out_free_calldata;
dc0b027d 2011 calldata->arg.fmode = 0;
a65318bf 2012 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2013 calldata->res.fattr = &calldata->fattr;
c1d51931 2014 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2015 calldata->res.server = server;
f7e8917a 2016 calldata->roc = roc;
f6948697
AV		 2017 path_get(path);
2018 calldata->path = *path;
9512135d 2019
1174dd1f
TM		 2020 msg.rpc_argp = &calldata->arg;
2021 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2022 task_setup_data.callback_data = calldata;
2023 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2024 if (IS_ERR(task))
2025 return PTR_ERR(task);
a49c3c77
TM		 2026 status = 0;
2027 if (wait)
2028 status = rpc_wait_for_completion_task(task);
b39e625b 2029 rpc_put_task(task);
a49c3c77 2030 return status;
9512135d
TM		 2031out_free_calldata:
2032 kfree(calldata);
2033out:
f7e8917a
FI		 2034 if (roc)
2035 pnfs_roc_release(state->inode);
b39e625b
TM		 2036 nfs4_put_open_state(state);
2037 nfs4_put_state_owner(sp);
9512135d 2038 return status;
1da177e4
LT		 2039}
2040
2b484297 2041static struct inode *
cd9a1c0e 2042nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2043{
1da177e4 2044 struct nfs4_state *state;
1da177e4 2045
565277f6 2046 /* Protect against concurrent sillydeletes */
cd9a1c0e 2047 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2048 if (IS_ERR(state))
2049 return ERR_CAST(state);
cd9a1c0e 2050 ctx->state = state;
f46e0bd3 2051 return igrab(state->inode);
1da177e4
LT		 2052}
2053
1185a552 2054static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2055{
2056 if (ctx->state == NULL)
2057 return;
2058 if (is_sync)
2059 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2060 else
2061 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2062}
1da177e4
LT		 2063
2064static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2065{
43652ad5
BH		 2066 struct nfs4_server_caps_arg args = {
2067 .fhandle = fhandle,
2068 };
1da177e4
LT		 2069 struct nfs4_server_caps_res res = {};
2070 struct rpc_message msg = {
2071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2072 .rpc_argp = &args,
1da177e4
LT		 2073 .rpc_resp = &res,
2074 };
2075 int status;
2076
cccef3b9 2077 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2078 if (status == 0) {
2079 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2080 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2081 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2082 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2083 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2084 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2085 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2086 server->caps |= NFS_CAP_ACLS;
2087 if (res.has_links != 0)
2088 server->caps |= NFS_CAP_HARDLINKS;
2089 if (res.has_symlinks != 0)
2090 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2091 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2092 server->caps |= NFS_CAP_FILEID;
2093 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2094 server->caps |= NFS_CAP_MODE;
2095 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2096 server->caps |= NFS_CAP_NLINK;
2097 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2098 server->caps |= NFS_CAP_OWNER;
2099 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2100 server->caps |= NFS_CAP_OWNER_GROUP;
2101 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2102 server->caps |= NFS_CAP_ATIME;
2103 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2104 server->caps |= NFS_CAP_CTIME;
2105 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2106 server->caps |= NFS_CAP_MTIME;
2107
a65318bf
TM		 2108 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2109 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2110 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2111 server->acl_bitmask = res.acl_bitmask;
2112 }
cccef3b9 2113
1da177e4
LT		 2114 return status;
2115}
2116
55a97593 2117int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2118{
2119 struct nfs4_exception exception = { };
2120 int err;
2121 do {
2122 err = nfs4_handle_exception(server,
2123 _nfs4_server_capabilities(server, fhandle),
2124 &exception);
2125 } while (exception.retry);
2126 return err;
2127}
2128
2129static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2130 struct nfs_fsinfo *info)
2131{
1da177e4
LT		 2132 struct nfs4_lookup_root_arg args = {
2133 .bitmask = nfs4_fattr_bitmap,
2134 };
2135 struct nfs4_lookup_res res = {
2136 .server = server,
0e574af1 2137 .fattr = info->fattr,
1da177e4
LT		 2138 .fh = fhandle,
2139 };
2140 struct rpc_message msg = {
2141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2142 .rpc_argp = &args,
2143 .rpc_resp = &res,
2144 };
008f55d0 2145
0e574af1 2146 nfs_fattr_init(info->fattr);
fccba804 2147 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2148}
2149
2150static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2151 struct nfs_fsinfo *info)
2152{
2153 struct nfs4_exception exception = { };
2154 int err;
2155 do {
2156 err = nfs4_handle_exception(server,
2157 _nfs4_lookup_root(server, fhandle, info),
2158 &exception);
2159 } while (exception.retry);
2160 return err;
2161}
2162
54ceac45
DH		 2163/*
2164 * get the file handle for the "/" directory on the server
2165 */
1da177e4 2166static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2167 struct nfs_fsinfo *info)
1da177e4 2168{
1da177e4
LT		 2169 int status;
2170
1da177e4 2171 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2172 if (status == 0)
2173 status = nfs4_server_capabilities(server, fhandle);
2174 if (status == 0)
2175 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2176 return nfs4_map_errors(status);
1da177e4
LT		 2177}
2178
6b97fd3d
MN		 2179/*
2180 * Get locations and (maybe) other attributes of a referral.
2181 * Note that we'll actually follow the referral later when
2182 * we detect fsid mismatch in inode revalidation
2183 */
56659e99 2184static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2185{
2186 int status = -ENOMEM;
2187 struct page *page = NULL;
2188 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2189
2190 page = alloc_page(GFP_KERNEL);
2191 if (page == NULL)
2192 goto out;
2193 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2194 if (locations == NULL)
2195 goto out;
2196
c228fd3a 2197 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2198 if (status != 0)
2199 goto out;
2200 /* Make sure server returned a different fsid for the referral */
2201 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2202 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2203 status = -EIO;
2204 goto out;
2205 }
2206
2207 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2208 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2209 if (!fattr->mode)
2210 fattr->mode = S_IFDIR;
2211 memset(fhandle, 0, sizeof(struct nfs_fh));
2212out:
2213 if (page)
2214 __free_page(page);
5d7ca35a 2215 kfree(locations);
6b97fd3d
MN		 2216 return status;
2217}
2218
1da177e4
LT		 2219static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2220{
2221 struct nfs4_getattr_arg args = {
2222 .fh = fhandle,
2223 .bitmask = server->attr_bitmask,
2224 };
2225 struct nfs4_getattr_res res = {
2226 .fattr = fattr,
2227 .server = server,
2228 };
2229 struct rpc_message msg = {
2230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2231 .rpc_argp = &args,
2232 .rpc_resp = &res,
2233 };
2234
0e574af1 2235 nfs_fattr_init(fattr);
cccef3b9 2236 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2237}
2238
2239static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2240{
2241 struct nfs4_exception exception = { };
2242 int err;
2243 do {
2244 err = nfs4_handle_exception(server,
2245 _nfs4_proc_getattr(server, fhandle, fattr),
2246 &exception);
2247 } while (exception.retry);
2248 return err;
2249}
2250
2251/*
2252 * The file is not closed if it is opened due to the a request to change
2253 * the size of the file. The open call will not be needed once the
2254 * VFS layer lookup-intents are implemented.
2255 *
2256 * Close is called when the inode is destroyed.
2257 * If we haven't opened the file for O_WRONLY, we
2258 * need to in the size_change case to obtain a stateid.
2259 *
2260 * Got race?
2261 * Because OPEN is always done by name in nfsv4, it is
2262 * possible that we opened a different file by the same
2263 * name. We can recognize this race condition, but we
2264 * can't do anything about it besides returning an error.
2265 *
2266 * This will be fixed with VFS changes (lookup-intent).
2267 */
2268static int
2269nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2270 struct iattr *sattr)
2271{
08e9eac4 2272 struct inode *inode = dentry->d_inode;
659bfcd6 2273 struct rpc_cred *cred = NULL;
d530838b 2274 struct nfs4_state *state = NULL;
1da177e4
LT		 2275 int status;
2276
0e574af1 2277 nfs_fattr_init(fattr);
1da177e4 2278
d530838b 2279 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2280 if (sattr->ia_valid & ATTR_FILE) {
2281 struct nfs_open_context *ctx;
2282
2283 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2284 if (ctx) {
2285 cred = ctx->cred;
2286 state = ctx->state;
2287 }
659bfcd6 2288 }
08e9eac4 2289
659bfcd6 2290 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2291 if (status == 0)
2292 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2293 return status;
2294}
2295
56659e99
TM		 2296static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2297 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2298 struct nfs_fattr *fattr)
2299{
2300 int status;
2301 struct nfs4_lookup_arg args = {
2302 .bitmask = server->attr_bitmask,
2303 .dir_fh = dirfh,
2304 .name = name,
2305 };
2306 struct nfs4_lookup_res res = {
2307 .server = server,
2308 .fattr = fattr,
2309 .fh = fhandle,
2310 };
2311 struct rpc_message msg = {
2312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2313 .rpc_argp = &args,
2314 .rpc_resp = &res,
2315 };
2316
2317 nfs_fattr_init(fattr);
2318
2319 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2320 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2321 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2322 return status;
2323}
2324
2325static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2326 struct qstr *name, struct nfs_fh *fhandle,
2327 struct nfs_fattr *fattr)
2328{
2329 struct nfs4_exception exception = { };
2330 int err;
2331 do {
4e56e082
TM		 2332 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2333 /* FIXME: !!!! */
2334 if (err == -NFS4ERR_MOVED) {
2335 err = -EREMOTE;
2336 break;
2337 }
2338 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2339 } while (exception.retry);
2340 return err;
2341}
2342
56659e99 2343static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2344 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2345{
4e56e082 2346 int status;
1da177e4
LT		 2347
2348 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2349 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2350 if (status == -NFS4ERR_MOVED)
2351 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2352 dprintk("NFS reply lookup: %d\n", status);
2353 return status;
2354}
2355
2356static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2357{
2358 struct nfs4_exception exception = { };
2359 int err;
2360 do {
2361 err = nfs4_handle_exception(NFS_SERVER(dir),
2362 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2363 &exception);
2364 } while (exception.retry);
2365 return err;
2366}
2367
2368static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2369{
76b32999 2370 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2371 struct nfs4_accessargs args = {
2372 .fh = NFS_FH(inode),
76b32999
TM		 2373 .bitmask = server->attr_bitmask,
2374 };
2375 struct nfs4_accessres res = {
2376 .server = server,
1da177e4 2377 };
1da177e4
LT		 2378 struct rpc_message msg = {
2379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2380 .rpc_argp = &args,
2381 .rpc_resp = &res,
2382 .rpc_cred = entry->cred,
2383 };
2384 int mode = entry->mask;
2385 int status;
2386
2387 /*
2388 * Determine which access bits we want to ask for...
2389 */
2390 if (mode & MAY_READ)
2391 args.access |= NFS4_ACCESS_READ;
2392 if (S_ISDIR(inode->i_mode)) {
2393 if (mode & MAY_WRITE)
2394 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2395 if (mode & MAY_EXEC)
2396 args.access |= NFS4_ACCESS_LOOKUP;
2397 } else {
2398 if (mode & MAY_WRITE)
2399 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2400 if (mode & MAY_EXEC)
2401 args.access |= NFS4_ACCESS_EXECUTE;
2402 }
c407d41a
TM		 2403
2404 res.fattr = nfs_alloc_fattr();
2405 if (res.fattr == NULL)
2406 return -ENOMEM;
2407
cccef3b9 2408 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2409 if (!status) {
2410 entry->mask = 0;
2411 if (res.access & NFS4_ACCESS_READ)
2412 entry->mask |= MAY_READ;
2413 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2414 entry->mask |= MAY_WRITE;
2415 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2416 entry->mask |= MAY_EXEC;
c407d41a 2417 nfs_refresh_inode(inode, res.fattr);
1da177e4 2418 }
c407d41a 2419 nfs_free_fattr(res.fattr);
1da177e4
LT		 2420 return status;
2421}
2422
2423static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2424{
2425 struct nfs4_exception exception = { };
2426 int err;
2427 do {
2428 err = nfs4_handle_exception(NFS_SERVER(inode),
2429 _nfs4_proc_access(inode, entry),
2430 &exception);
2431 } while (exception.retry);
2432 return err;
2433}
2434
2435/*
2436 * TODO: For the time being, we don't try to get any attributes
2437 * along with any of the zero-copy operations READ, READDIR,
2438 * READLINK, WRITE.
2439 *
2440 * In the case of the first three, we want to put the GETATTR
2441 * after the read-type operation -- this is because it is hard
2442 * to predict the length of a GETATTR response in v4, and thus
2443 * align the READ data correctly. This means that the GETATTR
2444 * may end up partially falling into the page cache, and we should
2445 * shift it into the 'tail' of the xdr_buf before processing.
2446 * To do this efficiently, we need to know the total length
2447 * of data received, which doesn't seem to be available outside
2448 * of the RPC layer.
2449 *
2450 * In the case of WRITE, we also want to put the GETATTR after
2451 * the operation -- in this case because we want to make sure
2452 * we get the post-operation mtime and size. This means that
2453 * we can't use xdr_encode_pages() as written: we need a variant
2454 * of it which would leave room in the 'tail' iovec.
2455 *
2456 * Both of these changes to the XDR layer would in fact be quite
2457 * minor, but I decided to leave them for a subsequent patch.
2458 */
2459static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2460 unsigned int pgbase, unsigned int pglen)
2461{
2462 struct nfs4_readlink args = {
2463 .fh = NFS_FH(inode),
2464 .pgbase = pgbase,
2465 .pglen = pglen,
2466 .pages = &page,
2467 };
f50c7000 2468 struct nfs4_readlink_res res;
1da177e4
LT		 2469 struct rpc_message msg = {
2470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2471 .rpc_argp = &args,
f50c7000 2472 .rpc_resp = &res,
1da177e4
LT		 2473 };
2474
cccef3b9 2475 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2476}
2477
2478static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2479 unsigned int pgbase, unsigned int pglen)
2480{
2481 struct nfs4_exception exception = { };
2482 int err;
2483 do {
2484 err = nfs4_handle_exception(NFS_SERVER(inode),
2485 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2486 &exception);
2487 } while (exception.retry);
2488 return err;
2489}
2490
1da177e4
LT		 2491/*
2492 * Got race?
2493 * We will need to arrange for the VFS layer to provide an atomic open.
2494 * Until then, this create/open method is prone to inefficiency and race
2495 * conditions due to the lookup, create, and open VFS calls from sys_open()
2496 * placed on the wire.
2497 *
2498 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2499 * The file will be opened again in the subsequent VFS open call
2500 * (nfs4_proc_file_open).
2501 *
2502 * The open for read will just hang around to be used by any process that
2503 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2504 */
2505
2506static int
2507nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2508 int flags, struct nfs_open_context *ctx)
1da177e4 2509{
c0204fd2 2510 struct path my_path = {
ad389da7
TM		 2511 .dentry = dentry,
2512 };
c0204fd2 2513 struct path *path = &my_path;
1da177e4 2514 struct nfs4_state *state;
c0204fd2
TM		 2515 struct rpc_cred *cred = NULL;
2516 fmode_t fmode = 0;
1da177e4
LT		 2517 int status = 0;
2518
c0204fd2
TM		 2519 if (ctx != NULL) {
2520 cred = ctx->cred;
2521 path = &ctx->path;
2522 fmode = ctx->mode;
1da177e4 2523 }
a8a5da99 2524 sattr->ia_mode &= ~current_umask();
c0204fd2 2525 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2526 d_drop(dentry);
1da177e4
LT		 2527 if (IS_ERR(state)) {
2528 status = PTR_ERR(state);
c0204fd2 2529 goto out;
1da177e4 2530 }
d4d9cdcb 2531 d_add(dentry, igrab(state->inode));
d75340cc 2532 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2533 if (ctx != NULL)
2534 ctx->state = state;
02a913a7 2535 else
c0204fd2 2536 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2537out:
2538 return status;
2539}
2540
2541static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2542{
16e42959 2543 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2544 struct nfs_removeargs args = {
1da177e4 2545 .fh = NFS_FH(dir),
4fdc17b2
TM		 2546 .name.len = name->len,
2547 .name.name = name->name,
16e42959
TM		 2548 .bitmask = server->attr_bitmask,
2549 };
4fdc17b2 2550 struct nfs_removeres res = {
16e42959 2551 .server = server,
1da177e4 2552 };
1da177e4 2553 struct rpc_message msg = {
4fdc17b2
TM		 2554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2555 .rpc_argp = &args,
2556 .rpc_resp = &res,
1da177e4 2557 };
d346890b
TM		 2558 int status = -ENOMEM;
2559
2560 res.dir_attr = nfs_alloc_fattr();
2561 if (res.dir_attr == NULL)
2562 goto out;
1da177e4 2563
cccef3b9 2564 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2565 if (status == 0) {
2566 update_changeattr(dir, &res.cinfo);
d346890b 2567 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2568 }
d346890b
TM		 2569 nfs_free_fattr(res.dir_attr);
2570out:
1da177e4
LT		 2571 return status;
2572}
2573
2574static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2575{
2576 struct nfs4_exception exception = { };
2577 int err;
2578 do {
2579 err = nfs4_handle_exception(NFS_SERVER(dir),
2580 _nfs4_proc_remove(dir, name),
2581 &exception);
2582 } while (exception.retry);
2583 return err;
2584}
2585
e4eff1a6 2586static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2587{
e4eff1a6
TM		 2588 struct nfs_server *server = NFS_SERVER(dir);
2589 struct nfs_removeargs *args = msg->rpc_argp;
2590 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2591
a65318bf 2592 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2593 res->server = server;
dfb4f309 2594 res->seq_res.sr_slot = NULL;
1da177e4 2595 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2596}
2597
e4eff1a6 2598static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2599{
e4eff1a6
TM		 2600 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2601
14516c3a
TM		 2602 if (!nfs4_sequence_done(task, &res->seq_res))
2603 return 0;
9e33bed5 2604 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2605 return 0;
2606 update_changeattr(dir, &res->cinfo);
d346890b 2607 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2608 return 1;
1da177e4
LT		 2609}
2610
d3d4152a
JL		 2611static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2612{
2613 struct nfs_server *server = NFS_SERVER(dir);
2614 struct nfs_renameargs *arg = msg->rpc_argp;
2615 struct nfs_renameres *res = msg->rpc_resp;
2616
2617 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2618 arg->bitmask = server->attr_bitmask;
2619 res->server = server;
2620}
2621
2622static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2623 struct inode *new_dir)
2624{
2625 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2626
2627 if (!nfs4_sequence_done(task, &res->seq_res))
2628 return 0;
2629 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2630 return 0;
2631
2632 update_changeattr(old_dir, &res->old_cinfo);
2633 nfs_post_op_update_inode(old_dir, res->old_fattr);
2634 update_changeattr(new_dir, &res->new_cinfo);
2635 nfs_post_op_update_inode(new_dir, res->new_fattr);
2636 return 1;
2637}
2638
1da177e4
LT		 2639static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2640 struct inode *new_dir, struct qstr *new_name)
2641{
6caf2c82 2642 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2643 struct nfs_renameargs arg = {
1da177e4
LT		 2644 .old_dir = NFS_FH(old_dir),
2645 .new_dir = NFS_FH(new_dir),
2646 .old_name = old_name,
2647 .new_name = new_name,
6caf2c82
TM		 2648 .bitmask = server->attr_bitmask,
2649 };
e8582a8b 2650 struct nfs_renameres res = {
6caf2c82 2651 .server = server,
1da177e4 2652 };
1da177e4
LT		 2653 struct rpc_message msg = {
2654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2655 .rpc_argp = &arg,
2656 .rpc_resp = &res,
2657 };
011fff72 2658 int status = -ENOMEM;
1da177e4 2659
011fff72
TM		 2660 res.old_fattr = nfs_alloc_fattr();
2661 res.new_fattr = nfs_alloc_fattr();
2662 if (res.old_fattr == NULL || res.new_fattr == NULL)
2663 goto out;
1da177e4 2664
011fff72 2665 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2666 if (!status) {
2667 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2668 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2669 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2670 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2671 }
011fff72
TM		 2672out:
2673 nfs_free_fattr(res.new_fattr);
2674 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2675 return status;
2676}
2677
2678static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2679 struct inode *new_dir, struct qstr *new_name)
2680{
2681 struct nfs4_exception exception = { };
2682 int err;
2683 do {
2684 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2685 _nfs4_proc_rename(old_dir, old_name,
2686 new_dir, new_name),
2687 &exception);
2688 } while (exception.retry);
2689 return err;
2690}
2691
2692static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2693{
91ba2eee 2694 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2695 struct nfs4_link_arg arg = {
2696 .fh = NFS_FH(inode),
2697 .dir_fh = NFS_FH(dir),
2698 .name = name,
91ba2eee
TM		 2699 .bitmask = server->attr_bitmask,
2700 };
91ba2eee
TM		 2701 struct nfs4_link_res res = {
2702 .server = server,
1da177e4 2703 };
1da177e4
LT		 2704 struct rpc_message msg = {
2705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2706 .rpc_argp = &arg,
91ba2eee 2707 .rpc_resp = &res,
1da177e4 2708 };
136f2627
TM		 2709 int status = -ENOMEM;
2710
2711 res.fattr = nfs_alloc_fattr();
2712 res.dir_attr = nfs_alloc_fattr();
2713 if (res.fattr == NULL || res.dir_attr == NULL)
2714 goto out;
1da177e4 2715
cccef3b9 2716 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2717 if (!status) {
2718 update_changeattr(dir, &res.cinfo);
2719 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2720 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2721 }
136f2627
TM		 2722out:
2723 nfs_free_fattr(res.dir_attr);
2724 nfs_free_fattr(res.fattr);
1da177e4
LT		 2725 return status;
2726}
2727
2728static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2729{
2730 struct nfs4_exception exception = { };
2731 int err;
2732 do {
2733 err = nfs4_handle_exception(NFS_SERVER(inode),
2734 _nfs4_proc_link(inode, dir, name),
2735 &exception);
2736 } while (exception.retry);
2737 return err;
2738}
2739
57dc9a57
TM		 2740struct nfs4_createdata {
2741 struct rpc_message msg;
2742 struct nfs4_create_arg arg;
2743 struct nfs4_create_res res;
2744 struct nfs_fh fh;
2745 struct nfs_fattr fattr;
2746 struct nfs_fattr dir_fattr;
2747};
2748
2749static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2750 struct qstr *name, struct iattr *sattr, u32 ftype)
2751{
2752 struct nfs4_createdata *data;
2753
2754 data = kzalloc(sizeof(*data), GFP_KERNEL);
2755 if (data != NULL) {
2756 struct nfs_server *server = NFS_SERVER(dir);
2757
2758 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2759 data->msg.rpc_argp = &data->arg;
2760 data->msg.rpc_resp = &data->res;
2761 data->arg.dir_fh = NFS_FH(dir);
2762 data->arg.server = server;
2763 data->arg.name = name;
2764 data->arg.attrs = sattr;
2765 data->arg.ftype = ftype;
2766 data->arg.bitmask = server->attr_bitmask;
2767 data->res.server = server;
2768 data->res.fh = &data->fh;
2769 data->res.fattr = &data->fattr;
2770 data->res.dir_fattr = &data->dir_fattr;
2771 nfs_fattr_init(data->res.fattr);
2772 nfs_fattr_init(data->res.dir_fattr);
2773 }
2774 return data;
2775}
2776
2777static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2778{
cccef3b9
AA		 2779 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2780 &data->arg, &data->res, 1);
57dc9a57
TM		 2781 if (status == 0) {
2782 update_changeattr(dir, &data->res.dir_cinfo);
2783 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2784 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2785 }
2786 return status;
2787}
2788
2789static void nfs4_free_createdata(struct nfs4_createdata *data)
2790{
2791 kfree(data);
2792}
2793
4f390c15 2794static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2795 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2796{
57dc9a57
TM		 2797 struct nfs4_createdata *data;
2798 int status = -ENAMETOOLONG;
1da177e4 2799
94a6d753 2800 if (len > NFS4_MAXPATHLEN)
57dc9a57 2801 goto out;
4f390c15 2802
57dc9a57
TM		 2803 status = -ENOMEM;
2804 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2805 if (data == NULL)
2806 goto out;
2807
2808 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2809 data->arg.u.symlink.pages = &page;
2810 data->arg.u.symlink.len = len;
1da177e4 2811
57dc9a57
TM		 2812 status = nfs4_do_create(dir, dentry, data);
2813
2814 nfs4_free_createdata(data);
2815out:
1da177e4
LT		 2816 return status;
2817}
2818
4f390c15 2819static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2820 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2821{
2822 struct nfs4_exception exception = { };
2823 int err;
2824 do {
2825 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2826 _nfs4_proc_symlink(dir, dentry, page,
2827 len, sattr),
1da177e4
LT		 2828 &exception);
2829 } while (exception.retry);
2830 return err;
2831}
2832
2833static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2834 struct iattr *sattr)
2835{
57dc9a57
TM		 2836 struct nfs4_createdata *data;
2837 int status = -ENOMEM;
1da177e4 2838
57dc9a57
TM		 2839 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2840 if (data == NULL)
2841 goto out;
2842
2843 status = nfs4_do_create(dir, dentry, data);
2844
2845 nfs4_free_createdata(data);
2846out:
1da177e4
LT		 2847 return status;
2848}
2849
2850static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2851 struct iattr *sattr)
2852{
2853 struct nfs4_exception exception = { };
2854 int err;
a8a5da99
AK		 2855
2856 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2857 do {
2858 err = nfs4_handle_exception(NFS_SERVER(dir),
2859 _nfs4_proc_mkdir(dir, dentry, sattr),
2860 &exception);
2861 } while (exception.retry);
2862 return err;
2863}
2864
2865static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2866 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2867{
2868 struct inode *dir = dentry->d_inode;
2869 struct nfs4_readdir_arg args = {
2870 .fh = NFS_FH(dir),
56e4ebf8 2871 .pages = pages,
1da177e4
LT		 2872 .pgbase = 0,
2873 .count = count,
96d25e53 2874 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2875 .plus = plus,
1da177e4
LT		 2876 };
2877 struct nfs4_readdir_res res;
2878 struct rpc_message msg = {
2879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2880 .rpc_argp = &args,
2881 .rpc_resp = &res,
2882 .rpc_cred = cred,
2883 };
2884 int status;
2885
3110ff80 2886 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2887 dentry->d_parent->d_name.name,
2888 dentry->d_name.name,
2889 (unsigned long long)cookie);
1da177e4
LT		 2890 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2891 res.pgbase = args.pgbase;
cccef3b9 2892 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
ac396128 2893 if (status >= 0) {
1da177e4 2894 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2895 status += args.pgbase;
2896 }
c4812998
TM		 2897
2898 nfs_invalidate_atime(dir);
2899
3110ff80 2900 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2901 return status;
2902}
2903
2904static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2905 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2906{
2907 struct nfs4_exception exception = { };
2908 int err;
2909 do {
2910 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2911 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2912 pages, count, plus),
1da177e4
LT		 2913 &exception);
2914 } while (exception.retry);
2915 return err;
2916}
2917
2918static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2919 struct iattr *sattr, dev_t rdev)
2920{
57dc9a57
TM		 2921 struct nfs4_createdata *data;
2922 int mode = sattr->ia_mode;
2923 int status = -ENOMEM;
1da177e4
LT		 2924
2925 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2926 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2927
2928 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2929 if (data == NULL)
2930 goto out;
2931
1da177e4 2932 if (S_ISFIFO(mode))
57dc9a57 2933 data->arg.ftype = NF4FIFO;
1da177e4 2934 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2935 data->arg.ftype = NF4BLK;
2936 data->arg.u.device.specdata1 = MAJOR(rdev);
2937 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2938 }
2939 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2940 data->arg.ftype = NF4CHR;
2941 data->arg.u.device.specdata1 = MAJOR(rdev);
2942 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2943 }
1da177e4 2944
57dc9a57
TM		 2945 status = nfs4_do_create(dir, dentry, data);
2946
2947 nfs4_free_createdata(data);
2948out:
1da177e4
LT		 2949 return status;
2950}
2951
2952static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2953 struct iattr *sattr, dev_t rdev)
2954{
2955 struct nfs4_exception exception = { };
2956 int err;
a8a5da99
AK		 2957
2958 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2959 do {
2960 err = nfs4_handle_exception(NFS_SERVER(dir),
2961 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2962 &exception);
2963 } while (exception.retry);
2964 return err;
2965}
2966
2967static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2968 struct nfs_fsstat *fsstat)
2969{
2970 struct nfs4_statfs_arg args = {
2971 .fh = fhandle,
2972 .bitmask = server->attr_bitmask,
2973 };
24ad148a
BH		 2974 struct nfs4_statfs_res res = {
2975 .fsstat = fsstat,
2976 };
1da177e4
LT		 2977 struct rpc_message msg = {
2978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2979 .rpc_argp = &args,
24ad148a 2980 .rpc_resp = &res,
1da177e4
LT		 2981 };
2982
0e574af1 2983 nfs_fattr_init(fsstat->fattr);
cccef3b9 2984 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2985}
2986
2987static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991 do {
2992 err = nfs4_handle_exception(server,
2993 _nfs4_proc_statfs(server, fhandle, fsstat),
2994 &exception);
2995 } while (exception.retry);
2996 return err;
2997}
2998
2999static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3000 struct nfs_fsinfo *fsinfo)
3001{
3002 struct nfs4_fsinfo_arg args = {
3003 .fh = fhandle,
3004 .bitmask = server->attr_bitmask,
3005 };
3dda5e43
BH		 3006 struct nfs4_fsinfo_res res = {
3007 .fsinfo = fsinfo,
3008 };
1da177e4
LT		 3009 struct rpc_message msg = {
3010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3011 .rpc_argp = &args,
3dda5e43 3012 .rpc_resp = &res,
1da177e4
LT		 3013 };
3014
cccef3b9 3015 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3016}
3017
3018static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022
3023 do {
3024 err = nfs4_handle_exception(server,
3025 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
3031static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3032{
0e574af1 3033 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3034 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3035}
3036
3037static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3038 struct nfs_pathconf *pathconf)
3039{
3040 struct nfs4_pathconf_arg args = {
3041 .fh = fhandle,
3042 .bitmask = server->attr_bitmask,
3043 };
d45b2989
BH		 3044 struct nfs4_pathconf_res res = {
3045 .pathconf = pathconf,
3046 };
1da177e4
LT		 3047 struct rpc_message msg = {
3048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3049 .rpc_argp = &args,
d45b2989 3050 .rpc_resp = &res,
1da177e4
LT		 3051 };
3052
3053 /* None of the pathconf attributes are mandatory to implement */
3054 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3055 memset(pathconf, 0, sizeof(*pathconf));
3056 return 0;
3057 }
3058
0e574af1 3059 nfs_fattr_init(pathconf->fattr);
cccef3b9 3060 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3061}
3062
3063static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3064 struct nfs_pathconf *pathconf)
3065{
3066 struct nfs4_exception exception = { };
3067 int err;
3068
3069 do {
3070 err = nfs4_handle_exception(server,
3071 _nfs4_proc_pathconf(server, fhandle, pathconf),
3072 &exception);
3073 } while (exception.retry);
3074 return err;
3075}
3076
ec06c096 3077static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3078{
ec06c096 3079 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3080
f11c88af
AA		 3081 dprintk("--> %s\n", __func__);
3082
14516c3a
TM		 3083 if (!nfs4_sequence_done(task, &data->res.seq_res))
3084 return -EAGAIN;
f11c88af 3085
9e33bed5 3086 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3087 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3088 return -EAGAIN;
1da177e4 3089 }
8850df99
TM		 3090
3091 nfs_invalidate_atime(data->inode);
1da177e4 3092 if (task->tk_status > 0)
ec06c096
TM		 3093 renew_lease(server, data->timestamp);
3094 return 0;
1da177e4
LT		 3095}
3096
bdc7f021 3097static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3098{
1da177e4 3099 data->timestamp = jiffies;
bdc7f021 3100 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3101}
3102
788e7a89 3103static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3104{
1da177e4
LT		 3105 struct inode *inode = data->inode;
3106
14516c3a
TM		 3107 if (!nfs4_sequence_done(task, &data->res.seq_res))
3108 return -EAGAIN;
def6ed7e 3109
9e33bed5 3110 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3111 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3112 return -EAGAIN;
1da177e4 3113 }
4f9838c7 3114 if (task->tk_status >= 0) {
1da177e4 3115 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3116 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3117 }
788e7a89 3118 return 0;
1da177e4
LT		 3119}
3120
bdc7f021 3121static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3122{
bdc7f021
TM		 3123 struct nfs_server *server = NFS_SERVER(data->inode);
3124
a65318bf 3125 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3126 data->res.server = server;
1da177e4
LT		 3127 data->timestamp = jiffies;
3128
bdc7f021 3129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3130}
3131
788e7a89 3132static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3133{
1da177e4
LT		 3134 struct inode *inode = data->inode;
3135
14516c3a
TM		 3136 if (!nfs4_sequence_done(task, &data->res.seq_res))
3137 return -EAGAIN;
3138
9e33bed5 3139 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3140 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3141 return -EAGAIN;
1da177e4 3142 }
9e08a3c5 3143 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3144 return 0;
1da177e4
LT		 3145}
3146
bdc7f021 3147static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3148{
788e7a89 3149 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3150
a65318bf 3151 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3152 data->res.server = server;
bdc7f021 3153 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3154}
3155
9bc4e3ca
CL		 3156struct nfs4_renewdata {
3157 struct nfs_client *client;
3158 unsigned long timestamp;
3159};
3160
1da177e4
LT		 3161/*
3162 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3163 * standalone procedure for queueing an asynchronous RENEW.
3164 */
9bc4e3ca 3165static void nfs4_renew_release(void *calldata)
dc96aef9 3166{
9bc4e3ca
CL		 3167 struct nfs4_renewdata *data = calldata;
3168 struct nfs_client *clp = data->client;
dc96aef9 3169
0851de06
AB		 3170 if (atomic_read(&clp->cl_count) > 1)
3171 nfs4_schedule_state_renewal(clp);
3172 nfs_put_client(clp);
9bc4e3ca 3173 kfree(data);
dc96aef9
AB		 3174}
3175
9bc4e3ca 3176static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3177{
9bc4e3ca
CL		 3178 struct nfs4_renewdata *data = calldata;
3179 struct nfs_client *clp = data->client;
3180 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3181
3182 if (task->tk_status < 0) {
95baa25c
TM		 3183 /* Unless we're shutting down, schedule state recovery! */
3184 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3185 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3186 return;
3187 }
452e9352 3188 do_renew_lease(clp, timestamp);
1da177e4
LT		 3189}
3190
963d8fe5
TM		 3191static const struct rpc_call_ops nfs4_renew_ops = {
3192 .rpc_call_done = nfs4_renew_done,
dc96aef9 3193 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3194};
3195
adfa6f98 3196int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3197{
3198 struct rpc_message msg = {
3199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3200 .rpc_argp = clp,
b4454fe1 3201 .rpc_cred = cred,
1da177e4 3202 };
9bc4e3ca 3203 struct nfs4_renewdata *data;
1da177e4 3204
0851de06
AB		 3205 if (!atomic_inc_not_zero(&clp->cl_count))
3206 return -EIO;
9bc4e3ca
CL		 3207 data = kmalloc(sizeof(*data), GFP_KERNEL);
3208 if (data == NULL)
3209 return -ENOMEM;
3210 data->client = clp;
3211 data->timestamp = jiffies;
1da177e4 3212 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3213 &nfs4_renew_ops, data);
1da177e4
LT		 3214}
3215
adfa6f98 3216int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3217{
3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3220 .rpc_argp = clp,
b4454fe1 3221 .rpc_cred = cred,
1da177e4
LT		 3222 };
3223 unsigned long now = jiffies;
3224 int status;
3225
3226 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3227 if (status < 0)
3228 return status;
452e9352 3229 do_renew_lease(clp, now);
1da177e4
LT		 3230 return 0;
3231}
3232
aa1870af
BF		 3233static inline int nfs4_server_supports_acls(struct nfs_server *server)
3234{
3235 return (server->caps & NFS_CAP_ACLS)
3236 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3237 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3238}
3239
3240/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3241 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3242 * the stack.
3243 */
3244#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3245
3246static void buf_to_pages(const void *buf, size_t buflen,
3247 struct page **pages, unsigned int *pgbase)
3248{
3249 const void *p = buf;
3250
3251 *pgbase = offset_in_page(buf);
3252 p -= *pgbase;
3253 while (p < buf + buflen) {
3254 *(pages++) = virt_to_page(p);
3255 p += PAGE_CACHE_SIZE;
3256 }
3257}
3258
e9e3d724
NH		 3259static int buf_to_pages_noslab(const void *buf, size_t buflen,
3260 struct page **pages, unsigned int *pgbase)
3261{
3262 struct page *newpage, **spages;
3263 int rc = 0;
3264 size_t len;
3265 spages = pages;
3266
3267 do {
43b7c3f0 3268 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3269 newpage = alloc_page(GFP_KERNEL);
3270
3271 if (newpage == NULL)
3272 goto unwind;
3273 memcpy(page_address(newpage), buf, len);
3274 buf += len;
3275 buflen -= len;
3276 *pages++ = newpage;
3277 rc++;
3278 } while (buflen != 0);
3279
3280 return rc;
3281
3282unwind:
3283 for(; rc > 0; rc--)
3284 __free_page(spages[rc-1]);
3285 return -ENOMEM;
3286}
3287
e50a1c2e
BF		 3288struct nfs4_cached_acl {
3289 int cached;
3290 size_t len;
3e9d4154 3291 char data[0];
e50a1c2e
BF		 3292};
3293
3294static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3295{
3296 struct nfs_inode *nfsi = NFS_I(inode);
3297
3298 spin_lock(&inode->i_lock);
3299 kfree(nfsi->nfs4_acl);
3300 nfsi->nfs4_acl = acl;
3301 spin_unlock(&inode->i_lock);
3302}
3303
3304static void nfs4_zap_acl_attr(struct inode *inode)
3305{
3306 nfs4_set_cached_acl(inode, NULL);
3307}
3308
3309static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3310{
3311 struct nfs_inode *nfsi = NFS_I(inode);
3312 struct nfs4_cached_acl *acl;
3313 int ret = -ENOENT;
3314
3315 spin_lock(&inode->i_lock);
3316 acl = nfsi->nfs4_acl;
3317 if (acl == NULL)
3318 goto out;
3319 if (buf == NULL) /* user is just asking for length */
3320 goto out_len;
3321 if (acl->cached == 0)
3322 goto out;
3323 ret = -ERANGE; /* see getxattr(2) man page */
3324 if (acl->len > buflen)
3325 goto out;
3326 memcpy(buf, acl->data, acl->len);
3327out_len:
3328 ret = acl->len;
3329out:
3330 spin_unlock(&inode->i_lock);
3331 return ret;
3332}
3333
3334static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3335{
3336 struct nfs4_cached_acl *acl;
3337
3338 if (buf && acl_len <= PAGE_SIZE) {
3339 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3340 if (acl == NULL)
3341 goto out;
3342 acl->cached = 1;
3343 memcpy(acl->data, buf, acl_len);
3344 } else {
3345 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3346 if (acl == NULL)
3347 goto out;
3348 acl->cached = 0;
3349 }
3350 acl->len = acl_len;
3351out:
3352 nfs4_set_cached_acl(inode, acl);
3353}
3354
16b4289c 3355static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3356{
aa1870af
BF		 3357 struct page *pages[NFS4ACL_MAXPAGES];
3358 struct nfs_getaclargs args = {
3359 .fh = NFS_FH(inode),
3360 .acl_pages = pages,
3361 .acl_len = buflen,
3362 };
663c79b3
BH		 3363 struct nfs_getaclres res = {
3364 .acl_len = buflen,
3365 };
e50a1c2e 3366 void *resp_buf;
aa1870af
BF		 3367 struct rpc_message msg = {
3368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3369 .rpc_argp = &args,
663c79b3 3370 .rpc_resp = &res,
aa1870af 3371 };
e50a1c2e 3372 struct page *localpage = NULL;
aa1870af
BF		 3373 int ret;
3374
e50a1c2e
BF		 3375 if (buflen < PAGE_SIZE) {
3376 /* As long as we're doing a round trip to the server anyway,
3377 * let's be prepared for a page of acl data. */
3378 localpage = alloc_page(GFP_KERNEL);
3379 resp_buf = page_address(localpage);
3380 if (localpage == NULL)
3381 return -ENOMEM;
3382 args.acl_pages[0] = localpage;
3383 args.acl_pgbase = 0;
663c79b3 3384 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3385 } else {
3386 resp_buf = buf;
3387 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3388 }
cccef3b9 3389 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3390 if (ret)
3391 goto out_free;
663c79b3
BH		 3392 if (res.acl_len > args.acl_len)
3393 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3394 else
663c79b3 3395 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3396 if (buf) {
3397 ret = -ERANGE;
663c79b3 3398 if (res.acl_len > buflen)
e50a1c2e
BF		 3399 goto out_free;
3400 if (localpage)
663c79b3 3401 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3402 }
663c79b3 3403 ret = res.acl_len;
e50a1c2e
BF		 3404out_free:
3405 if (localpage)
3406 __free_page(localpage);
aa1870af
BF		 3407 return ret;
3408}
3409
16b4289c
TM		 3410static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3411{
3412 struct nfs4_exception exception = { };
3413 ssize_t ret;
3414 do {
3415 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3416 if (ret >= 0)
3417 break;
3418 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3419 } while (exception.retry);
3420 return ret;
3421}
3422
e50a1c2e
BF		 3423static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3424{
3425 struct nfs_server *server = NFS_SERVER(inode);
3426 int ret;
3427
3428 if (!nfs4_server_supports_acls(server))
3429 return -EOPNOTSUPP;
3430 ret = nfs_revalidate_inode(server, inode);
3431 if (ret < 0)
3432 return ret;
08a22b39
AK		 3433 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3434 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3435 ret = nfs4_read_cached_acl(inode, buf, buflen);
3436 if (ret != -ENOENT)
3437 return ret;
3438 return nfs4_get_acl_uncached(inode, buf, buflen);
3439}
3440
16b4289c 3441static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3442{
3443 struct nfs_server *server = NFS_SERVER(inode);
3444 struct page *pages[NFS4ACL_MAXPAGES];
3445 struct nfs_setaclargs arg = {
3446 .fh = NFS_FH(inode),
3447 .acl_pages = pages,
3448 .acl_len = buflen,
3449 };
73c403a9 3450 struct nfs_setaclres res;
4b580ee3
BF		 3451 struct rpc_message msg = {
3452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3453 .rpc_argp = &arg,
73c403a9 3454 .rpc_resp = &res,
4b580ee3 3455 };
e9e3d724 3456 int ret, i;
4b580ee3
BF		 3457
3458 if (!nfs4_server_supports_acls(server))
3459 return -EOPNOTSUPP;
e9e3d724
NH		 3460 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3461 if (i < 0)
3462 return i;
642ac549 3463 nfs_inode_return_delegation(inode);
cccef3b9 3464 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
e9e3d724
NH		 3465
3466 /*
3467 * Free each page after tx, so the only ref left is
3468 * held by the network stack
3469 */
3470 for (; i > 0; i--)
3471 put_page(pages[i-1]);
3472
08a22b39
AK		 3473 /*
3474 * Acl update can result in inode attribute update.
3475 * so mark the attribute cache invalid.
3476 */
3477 spin_lock(&inode->i_lock);
3478 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3479 spin_unlock(&inode->i_lock);
f41f7418
TM		 3480 nfs_access_zap_cache(inode);
3481 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3482 return ret;
3483}
3484
16b4289c
TM		 3485static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3486{
3487 struct nfs4_exception exception = { };
3488 int err;
3489 do {
3490 err = nfs4_handle_exception(NFS_SERVER(inode),
3491 __nfs4_proc_set_acl(inode, buf, buflen),
3492 &exception);
3493 } while (exception.retry);
3494 return err;
3495}
3496
1da177e4 3497static int
aa5190d0 3498nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3499{
aa5190d0
TM		 3500 struct nfs_client *clp = server->nfs_client;
3501
3502 if (task->tk_status >= 0)
1da177e4
LT		 3503 return 0;
3504 switch(task->tk_status) {
9e33bed5
TM		 3505 case -NFS4ERR_ADMIN_REVOKED:
3506 case -NFS4ERR_BAD_STATEID:
3507 case -NFS4ERR_OPENMODE:
3508 if (state == NULL)
3509 break;
0400a6b0
TM		 3510 nfs4_schedule_stateid_recovery(server, state);
3511 goto wait_on_recovery;
1da177e4 3512 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3513 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3514 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3515 nfs4_schedule_lease_recovery(clp);
3516 goto wait_on_recovery;
4745e315
AA		 3517#if defined(CONFIG_NFS_V4_1)
3518 case -NFS4ERR_BADSESSION:
3519 case -NFS4ERR_BADSLOT:
3520 case -NFS4ERR_BAD_HIGH_SLOT:
3521 case -NFS4ERR_DEADSESSION:
3522 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3523 case -NFS4ERR_SEQ_FALSE_RETRY:
3524 case -NFS4ERR_SEQ_MISORDERED:
3525 dprintk("%s ERROR %d, Reset session\n", __func__,
3526 task->tk_status);
0400a6b0 3527 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3528 task->tk_status = 0;
3529 return -EAGAIN;
3530#endif /* CONFIG_NFS_V4_1 */
1da177e4 3531 case -NFS4ERR_DELAY:
aa5190d0 3532 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3533 case -NFS4ERR_GRACE:
2c643488 3534 case -EKEYEXPIRED:
1da177e4
LT		 3535 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3536 task->tk_status = 0;
3537 return -EAGAIN;
3538 case -NFS4ERR_OLD_STATEID:
3539 task->tk_status = 0;
3540 return -EAGAIN;
3541 }
3542 task->tk_status = nfs4_map_errors(task->tk_status);
3543 return 0;
0400a6b0 3544wait_on_recovery:
a2c0b9e2 3545 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3546 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3547 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3548 task->tk_status = 0;
3549 return -EAGAIN;
1da177e4
LT		 3550}
3551
bb8b27e5
TM		 3552int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3553 unsigned short port, struct rpc_cred *cred,
3554 struct nfs4_setclientid_res *res)
1da177e4
LT		 3555{
3556 nfs4_verifier sc_verifier;
3557 struct nfs4_setclientid setclientid = {
3558 .sc_verifier = &sc_verifier,
3559 .sc_prog = program,
f4eecd5d 3560 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3561 };
3562 struct rpc_message msg = {
3563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3564 .rpc_argp = &setclientid,
bb8b27e5 3565 .rpc_resp = res,
286d7d6a 3566 .rpc_cred = cred,
1da177e4 3567 };
bc4785cd 3568 __be32 *p;
1da177e4
LT		 3569 int loop = 0;
3570 int status;
3571
bc4785cd 3572 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3573 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3574 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3575
3576 for(;;) {
3577 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3578 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3579 clp->cl_ipaddr,
3580 rpc_peeraddr2str(clp->cl_rpcclient,
3581 RPC_DISPLAY_ADDR),
69dd716c
TM		 3582 rpc_peeraddr2str(clp->cl_rpcclient,
3583 RPC_DISPLAY_PROTO),
78ea323b 3584 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3585 clp->cl_id_uniquifier);
3586 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3587 sizeof(setclientid.sc_netid),
3588 rpc_peeraddr2str(clp->cl_rpcclient,
3589 RPC_DISPLAY_NETID));
1da177e4 3590 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3591 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3592 clp->cl_ipaddr, port >> 8, port & 255);
3593
3594 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3595 if (status != -NFS4ERR_CLID_INUSE)
3596 break;
3597 if (signalled())
3598 break;
3599 if (loop++ & 1)
611c96c8 3600 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3601 else
3602 if (++clp->cl_id_uniquifier == 0)
3603 break;
3604 }
3605 return status;
3606}
3607
bb8b27e5
TM		 3608static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3609 struct nfs4_setclientid_res *arg,
3610 struct rpc_cred *cred)
1da177e4
LT		 3611{
3612 struct nfs_fsinfo fsinfo;
3613 struct rpc_message msg = {
3614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3615 .rpc_argp = arg,
1da177e4 3616 .rpc_resp = &fsinfo,
286d7d6a 3617 .rpc_cred = cred,
1da177e4
LT		 3618 };
3619 unsigned long now;
3620 int status;
3621
3622 now = jiffies;
3623 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3624 if (status == 0) {
3625 spin_lock(&clp->cl_lock);
3626 clp->cl_lease_time = fsinfo.lease_time * HZ;
3627 clp->cl_last_renewal = now;
3628 spin_unlock(&clp->cl_lock);
3629 }
3630 return status;
3631}
3632
bb8b27e5
TM		 3633int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3634 struct nfs4_setclientid_res *arg,
3635 struct rpc_cred *cred)
51581f3b 3636{
77e03677 3637 long timeout = 0;
51581f3b
TM		 3638 int err;
3639 do {
bb8b27e5 3640 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3641 switch (err) {
3642 case 0:
3643 return err;
3644 case -NFS4ERR_RESOURCE:
3645 /* The IBM lawyers misread another document! */
3646 case -NFS4ERR_DELAY:
3647 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3648 }
3649 } while (err == 0);
3650 return err;
3651}
3652
fe650407
TM		 3653struct nfs4_delegreturndata {
3654 struct nfs4_delegreturnargs args;
fa178f29 3655 struct nfs4_delegreturnres res;
fe650407
TM		 3656 struct nfs_fh fh;
3657 nfs4_stateid stateid;
26e976a8 3658 unsigned long timestamp;
fa178f29 3659 struct nfs_fattr fattr;
fe650407
TM		 3660 int rpc_status;
3661};
3662
fe650407
TM		 3663static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3664{
3665 struct nfs4_delegreturndata *data = calldata;
938e1010 3666
14516c3a
TM		 3667 if (!nfs4_sequence_done(task, &data->res.seq_res))
3668 return;
938e1010 3669
79708861
RL		 3670 switch (task->tk_status) {
3671 case -NFS4ERR_STALE_STATEID:
3672 case -NFS4ERR_EXPIRED:
3673 case 0:
fa178f29 3674 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3675 break;
3676 default:
3677 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3678 -EAGAIN) {
3679 nfs_restart_rpc(task, data->res.server->nfs_client);
3680 return;
3681 }
3682 }
3683 data->rpc_status = task->tk_status;
fe650407
TM		 3684}
3685
3686static void nfs4_delegreturn_release(void *calldata)
3687{
fe650407
TM		 3688 kfree(calldata);
3689}
3690
938e1010
AA		 3691#if defined(CONFIG_NFS_V4_1)
3692static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3693{
3694 struct nfs4_delegreturndata *d_data;
3695
3696 d_data = (struct nfs4_delegreturndata *)data;
3697
035168ab 3698 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3699 &d_data->args.seq_args,
3700 &d_data->res.seq_res, 1, task))
3701 return;
3702 rpc_call_start(task);
3703}
3704#endif /* CONFIG_NFS_V4_1 */
3705
c8d149f3 3706static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3707#if defined(CONFIG_NFS_V4_1)
3708 .rpc_call_prepare = nfs4_delegreturn_prepare,
3709#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3710 .rpc_call_done = nfs4_delegreturn_done,
3711 .rpc_release = nfs4_delegreturn_release,
3712};
3713
e6f81075 3714static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3715{
3716 struct nfs4_delegreturndata *data;
fa178f29 3717 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3718 struct rpc_task *task;
5138fde0
TM		 3719 struct rpc_message msg = {
3720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3721 .rpc_cred = cred,
3722 };
c970aa85
TM		 3723 struct rpc_task_setup task_setup_data = {
3724 .rpc_client = server->client,
5138fde0 3725 .rpc_message = &msg,
c970aa85
TM		 3726 .callback_ops = &nfs4_delegreturn_ops,
3727 .flags = RPC_TASK_ASYNC,
3728 };
e6f81075 3729 int status = 0;
fe650407 3730
8535b2be 3731 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3732 if (data == NULL)
3733 return -ENOMEM;
3734 data->args.fhandle = &data->fh;
3735 data->args.stateid = &data->stateid;
fa178f29 3736 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3737 nfs_copy_fh(&data->fh, NFS_FH(inode));
3738 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3739 data->res.fattr = &data->fattr;
3740 data->res.server = server;
5138fde0 3741 nfs_fattr_init(data->res.fattr);
26e976a8 3742 data->timestamp = jiffies;
fe650407
TM		 3743 data->rpc_status = 0;
3744
c970aa85 3745 task_setup_data.callback_data = data;
1174dd1f
TM		 3746 msg.rpc_argp = &data->args;
3747 msg.rpc_resp = &data->res;
c970aa85 3748 task = rpc_run_task(&task_setup_data);
7a1218a2 3749 if (IS_ERR(task))
fe650407 3750 return PTR_ERR(task);
e6f81075
TM		 3751 if (!issync)
3752 goto out;
fe650407 3753 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3754 if (status != 0)
3755 goto out;
3756 status = data->rpc_status;
3757 if (status != 0)
3758 goto out;
3759 nfs_refresh_inode(inode, &data->fattr);
3760out:
e6b3c4db 3761 rpc_put_task(task);
fe650407 3762 return status;
1da177e4
LT		 3763}
3764
e6f81075 3765int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3766{
3767 struct nfs_server *server = NFS_SERVER(inode);
3768 struct nfs4_exception exception = { };
3769 int err;
3770 do {
e6f81075 3771 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3772 switch (err) {
3773 case -NFS4ERR_STALE_STATEID:
3774 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3775 case 0:
3776 return 0;
3777 }
3778 err = nfs4_handle_exception(server, err, &exception);
3779 } while (exception.retry);
3780 return err;
3781}
3782
3783#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3784#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3785
3786/*
3787 * sleep, with exponential backoff, and retry the LOCK operation.
3788 */
3789static unsigned long
3790nfs4_set_lock_task_retry(unsigned long timeout)
3791{
150030b7 3792 schedule_timeout_killable(timeout);
1da177e4
LT		 3793 timeout <<= 1;
3794 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3795 return NFS4_LOCK_MAXTIMEOUT;
3796 return timeout;
3797}
3798
1da177e4
LT		 3799static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3800{
3801 struct inode *inode = state->inode;
3802 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3803 struct nfs_client *clp = server->nfs_client;
911d1aaf 3804 struct nfs_lockt_args arg = {
1da177e4 3805 .fh = NFS_FH(inode),
911d1aaf 3806 .fl = request,
1da177e4 3807 };
911d1aaf
TM		 3808 struct nfs_lockt_res res = {
3809 .denied = request,
1da177e4
LT		 3810 };
3811 struct rpc_message msg = {
3812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3813 .rpc_argp = &arg,
3814 .rpc_resp = &res,
3815 .rpc_cred = state->owner->so_cred,
3816 };
1da177e4
LT		 3817 struct nfs4_lock_state *lsp;
3818 int status;
3819
911d1aaf 3820 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3821 status = nfs4_set_lock_state(state, request);
3822 if (status != 0)
3823 goto out;
3824 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3825 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3826 arg.lock_owner.s_dev = server->s_dev;
cccef3b9 3827 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3828 switch (status) {
3829 case 0:
3830 request->fl_type = F_UNLCK;
3831 break;
3832 case -NFS4ERR_DENIED:
3833 status = 0;
1da177e4 3834 }
70cc6487 3835 request->fl_ops->fl_release_private(request);
8d0a8a9d 3836out:
1da177e4
LT		 3837 return status;
3838}
3839
3840static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3841{
3842 struct nfs4_exception exception = { };
3843 int err;
3844
3845 do {
3846 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3847 _nfs4_proc_getlk(state, cmd, request),
3848 &exception);
3849 } while (exception.retry);
3850 return err;
3851}
3852
3853static int do_vfs_lock(struct file *file, struct file_lock *fl)
3854{
3855 int res = 0;
3856 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3857 case FL_POSIX:
3858 res = posix_lock_file_wait(file, fl);
3859 break;
3860 case FL_FLOCK:
3861 res = flock_lock_file_wait(file, fl);
3862 break;
3863 default:
3864 BUG();
3865 }
1da177e4
LT		 3866 return res;
3867}
3868
faf5f49c 3869struct nfs4_unlockdata {
911d1aaf
TM		 3870 struct nfs_locku_args arg;
3871 struct nfs_locku_res res;
faf5f49c
TM		 3872 struct nfs4_lock_state *lsp;
3873 struct nfs_open_context *ctx;
911d1aaf
TM		 3874 struct file_lock fl;
3875 const struct nfs_server *server;
26e976a8 3876 unsigned long timestamp;
faf5f49c
TM		 3877};
3878
911d1aaf
TM		 3879static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3880 struct nfs_open_context *ctx,
3881 struct nfs4_lock_state *lsp,
3882 struct nfs_seqid *seqid)
3883{
3884 struct nfs4_unlockdata *p;
3885 struct inode *inode = lsp->ls_state->inode;
3886
8535b2be 3887 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3888 if (p == NULL)
3889 return NULL;
3890 p->arg.fh = NFS_FH(inode);
3891 p->arg.fl = &p->fl;
3892 p->arg.seqid = seqid;
c1d51931 3893 p->res.seqid = seqid;
911d1aaf
TM		 3894 p->arg.stateid = &lsp->ls_stateid;
3895 p->lsp = lsp;
3896 atomic_inc(&lsp->ls_count);
3897 /* Ensure we don't close file until we're done freeing locks! */
3898 p->ctx = get_nfs_open_context(ctx);
3899 memcpy(&p->fl, fl, sizeof(p->fl));
3900 p->server = NFS_SERVER(inode);
3901 return p;
3902}
3903
06f814a3 3904static void nfs4_locku_release_calldata(void *data)
faf5f49c 3905{
963d8fe5 3906 struct nfs4_unlockdata *calldata = data;
911d1aaf 3907 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3908 nfs4_put_lock_state(calldata->lsp);
3909 put_nfs_open_context(calldata->ctx);
3910 kfree(calldata);
faf5f49c
TM		 3911}
3912
963d8fe5 3913static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3914{
963d8fe5 3915 struct nfs4_unlockdata *calldata = data;
faf5f49c 3916
14516c3a
TM		 3917 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3918 return;
faf5f49c
TM		 3919 switch (task->tk_status) {
3920 case 0:
3921 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3922 calldata->res.stateid.data,
faf5f49c 3923 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3924 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3925 break;
9e33bed5
TM		 3926 case -NFS4ERR_BAD_STATEID:
3927 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3928 case -NFS4ERR_STALE_STATEID:
3929 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3930 break;
3931 default:
9e33bed5 3932 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3933 nfs_restart_rpc(task,
d61e612a 3934 calldata->server->nfs_client);
faf5f49c 3935 }
faf5f49c
TM		 3936}
3937
4ce70ada 3938static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3939{
4ce70ada 3940 struct nfs4_unlockdata *calldata = data;
faf5f49c 3941
911d1aaf 3942 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3943 return;
3944 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3945 /* Note: exit _without_ running nfs4_locku_done */
3946 task->tk_action = NULL;
faf5f49c
TM		 3947 return;
3948 }
26e976a8 3949 calldata->timestamp = jiffies;
035168ab 3950 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3951 &calldata->arg.seq_args,
3952 &calldata->res.seq_res, 1, task))
3953 return;
5138fde0 3954 rpc_call_start(task);
faf5f49c
TM		 3955}
3956
963d8fe5 3957static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3958 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3959 .rpc_call_done = nfs4_locku_done,
06f814a3 3960 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3961};
3962
a5d16a4d
TM		 3963static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3964 struct nfs_open_context *ctx,
3965 struct nfs4_lock_state *lsp,
3966 struct nfs_seqid *seqid)
3967{
3968 struct nfs4_unlockdata *data;
5138fde0
TM		 3969 struct rpc_message msg = {
3970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3971 .rpc_cred = ctx->cred,
3972 };
c970aa85
TM		 3973 struct rpc_task_setup task_setup_data = {
3974 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3975 .rpc_message = &msg,
c970aa85 3976 .callback_ops = &nfs4_locku_ops,
101070ca 3977 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3978 .flags = RPC_TASK_ASYNC,
3979 };
a5d16a4d 3980
137d6aca
FF		 3981 /* Ensure this is an unlock - when canceling a lock, the
3982 * canceled lock is passed in, and it won't be an unlock.
3983 */
3984 fl->fl_type = F_UNLCK;
3985
a5d16a4d
TM		 3986 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3987 if (data == NULL) {
3988 nfs_free_seqid(seqid);
3989 return ERR_PTR(-ENOMEM);
3990 }
3991
1174dd1f
TM		 3992 msg.rpc_argp = &data->arg;
3993 msg.rpc_resp = &data->res;
c970aa85
TM		 3994 task_setup_data.callback_data = data;
3995 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3996}
3997
faf5f49c
TM		 3998static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3999{
19e03c57 4000 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4001 struct nfs_seqid *seqid;
1da177e4 4002 struct nfs4_lock_state *lsp;
06f814a3
TM		 4003 struct rpc_task *task;
4004 int status = 0;
536ff0f8 4005 unsigned char fl_flags = request->fl_flags;
faf5f49c 4006
8d0a8a9d 4007 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4008 /* Unlock _before_ we do the RPC call */
4009 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4010 down_read(&nfsi->rwsem);
4011 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4012 up_read(&nfsi->rwsem);
9b073574 4013 goto out;
19e03c57
TM		 4014 }
4015 up_read(&nfsi->rwsem);
8d0a8a9d 4016 if (status != 0)
9b073574
TM		 4017 goto out;
4018 /* Is this a delegated lock? */
4019 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4020 goto out;
8d0a8a9d 4021 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4022 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4023 status = -ENOMEM;
911d1aaf 4024 if (seqid == NULL)
9b073574 4025 goto out;
cd3758e3 4026 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4027 status = PTR_ERR(task);
4028 if (IS_ERR(task))
9b073574 4029 goto out;
a5d16a4d 4030 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4031 rpc_put_task(task);
9b073574 4032out:
536ff0f8 4033 request->fl_flags = fl_flags;
1da177e4
LT		 4034 return status;
4035}
4036
a5d16a4d
TM		 4037struct nfs4_lockdata {
4038 struct nfs_lock_args arg;
4039 struct nfs_lock_res res;
4040 struct nfs4_lock_state *lsp;
4041 struct nfs_open_context *ctx;
4042 struct file_lock fl;
26e976a8 4043 unsigned long timestamp;
a5d16a4d
TM		 4044 int rpc_status;
4045 int cancelled;
66179efe 4046 struct nfs_server *server;
a5d16a4d
TM		 4047};
4048
4049static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4050 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4051 gfp_t gfp_mask)
1da177e4 4052{
a5d16a4d
TM		 4053 struct nfs4_lockdata *p;
4054 struct inode *inode = lsp->ls_state->inode;
1da177e4 4055 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4056
8535b2be 4057 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4058 if (p == NULL)
4059 return NULL;
4060
4061 p->arg.fh = NFS_FH(inode);
4062 p->arg.fl = &p->fl;
8535b2be 4063 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4064 if (p->arg.open_seqid == NULL)
4065 goto out_free;
8535b2be 4066 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4067 if (p->arg.lock_seqid == NULL)
2f74c0a0 4068 goto out_free_seqid;
a5d16a4d 4069 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4070 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4071 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4072 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4073 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4074 p->lsp = lsp;
66179efe 4075 p->server = server;
a5d16a4d
TM		 4076 atomic_inc(&lsp->ls_count);
4077 p->ctx = get_nfs_open_context(ctx);
4078 memcpy(&p->fl, fl, sizeof(p->fl));
4079 return p;
2f74c0a0
TM		 4080out_free_seqid:
4081 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4082out_free:
4083 kfree(p);
4084 return NULL;
4085}
4086
4087static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4088{
4089 struct nfs4_lockdata *data = calldata;
4090 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4091
3110ff80 4092 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4093 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4094 return;
a5d16a4d
TM		 4095 /* Do we need to do an open_to_lock_owner? */
4096 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4097 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4098 return;
a5d16a4d
TM		 4099 data->arg.open_stateid = &state->stateid;
4100 data->arg.new_lock_owner = 1;
c1d51931 4101 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4102 } else
4103 data->arg.new_lock_owner = 0;
26e976a8 4104 data->timestamp = jiffies;
035168ab
TM		 4105 if (nfs4_setup_sequence(data->server,
4106 &data->arg.seq_args,
66179efe
AA		 4107 &data->res.seq_res, 1, task))
4108 return;
5138fde0 4109 rpc_call_start(task);
3110ff80 4110 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4111}
4112
b257957e
AB		 4113static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4114{
4115 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4116 nfs4_lock_prepare(task, calldata);
4117}
4118
a5d16a4d
TM		 4119static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4120{
4121 struct nfs4_lockdata *data = calldata;
4122
3110ff80 4123 dprintk("%s: begin!\n", __func__);
a5d16a4d 4124
14516c3a
TM		 4125 if (!nfs4_sequence_done(task, &data->res.seq_res))
4126 return;
66179efe 4127
a5d16a4d 4128 data->rpc_status = task->tk_status;
a5d16a4d 4129 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4130 if (data->rpc_status == 0)
4131 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4132 else
4133 goto out;
4134 }
4135 if (data->rpc_status == 0) {
4136 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4137 sizeof(data->lsp->ls_stateid.data));
4138 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4139 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4140 }
a5d16a4d 4141out:
3110ff80 4142 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4143}
4144
4145static void nfs4_lock_release(void *calldata)
4146{
4147 struct nfs4_lockdata *data = calldata;
4148
3110ff80 4149 dprintk("%s: begin!\n", __func__);
2f74c0a0 4150 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4151 if (data->cancelled != 0) {
4152 struct rpc_task *task;
4153 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4154 data->arg.lock_seqid);
4155 if (!IS_ERR(task))
bf294b41 4156 rpc_put_task_async(task);
3110ff80 4157 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4158 } else
4159 nfs_free_seqid(data->arg.lock_seqid);
4160 nfs4_put_lock_state(data->lsp);
4161 put_nfs_open_context(data->ctx);
4162 kfree(data);
3110ff80 4163 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4164}
4165
4166static const struct rpc_call_ops nfs4_lock_ops = {
4167 .rpc_call_prepare = nfs4_lock_prepare,
4168 .rpc_call_done = nfs4_lock_done,
4169 .rpc_release = nfs4_lock_release,
4170};
4171
b257957e
AB		 4172static const struct rpc_call_ops nfs4_recover_lock_ops = {
4173 .rpc_call_prepare = nfs4_recover_lock_prepare,
4174 .rpc_call_done = nfs4_lock_done,
4175 .rpc_release = nfs4_lock_release,
4176};
4177
2bee72a6
TM		 4178static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4179{
2bee72a6
TM		 4180 switch (error) {
4181 case -NFS4ERR_ADMIN_REVOKED:
4182 case -NFS4ERR_BAD_STATEID:
ecac799a 4183 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4184 if (new_lock_owner != 0 ||
4185 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4186 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4187 break;
4188 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4189 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4190 case -NFS4ERR_EXPIRED:
4191 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4192 };
4193}
4194
afe6c27c 4195static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4196{
4197 struct nfs4_lockdata *data;
4198 struct rpc_task *task;
5138fde0
TM		 4199 struct rpc_message msg = {
4200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4201 .rpc_cred = state->owner->so_cred,
4202 };
c970aa85
TM		 4203 struct rpc_task_setup task_setup_data = {
4204 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4205 .rpc_message = &msg,
c970aa85 4206 .callback_ops = &nfs4_lock_ops,
101070ca 4207 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4208 .flags = RPC_TASK_ASYNC,
4209 };
a5d16a4d
TM		 4210 int ret;
4211
3110ff80 4212 dprintk("%s: begin!\n", __func__);
cd3758e3 4213 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4214 fl->fl_u.nfs4_fl.owner,
4215 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4216 if (data == NULL)
4217 return -ENOMEM;
4218 if (IS_SETLKW(cmd))
4219 data->arg.block = 1;
b257957e
AB		 4220 if (recovery_type > NFS_LOCK_NEW) {
4221 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4222 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4223 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4224 }
1174dd1f
TM		 4225 msg.rpc_argp = &data->arg;
4226 msg.rpc_resp = &data->res;
c970aa85
TM		 4227 task_setup_data.callback_data = data;
4228 task = rpc_run_task(&task_setup_data);
7a1218a2 4229 if (IS_ERR(task))
a5d16a4d 4230 return PTR_ERR(task);
a5d16a4d
TM		 4231 ret = nfs4_wait_for_completion_rpc_task(task);
4232 if (ret == 0) {
4233 ret = data->rpc_status;
2bee72a6
TM		 4234 if (ret)
4235 nfs4_handle_setlk_error(data->server, data->lsp,
4236 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4237 } else
4238 data->cancelled = 1;
e6b3c4db 4239 rpc_put_task(task);
3110ff80 4240 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4241 return ret;
1da177e4
LT		 4242}
4243
4244static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4245{
202b50dc
TM		 4246 struct nfs_server *server = NFS_SERVER(state->inode);
4247 struct nfs4_exception exception = { };
4248 int err;
4249
4250 do {
42a2d13e
TM		 4251 /* Cache the lock if possible... */
4252 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4253 return 0;
afe6c27c 4254 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4255 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4256 break;
4257 nfs4_handle_exception(server, err, &exception);
4258 } while (exception.retry);
4259 return err;
1da177e4
LT		 4260}
4261
4262static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4263{
202b50dc
TM		 4264 struct nfs_server *server = NFS_SERVER(state->inode);
4265 struct nfs4_exception exception = { };
4266 int err;
4267
6bfc93ef
TM		 4268 err = nfs4_set_lock_state(state, request);
4269 if (err != 0)
4270 return err;
202b50dc 4271 do {
42a2d13e
TM		 4272 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4273 return 0;
afe6c27c 4274 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4275 switch (err) {
4276 default:
4277 goto out;
4278 case -NFS4ERR_GRACE:
4279 case -NFS4ERR_DELAY:
4280 nfs4_handle_exception(server, err, &exception);
4281 err = 0;
4282 }
202b50dc 4283 } while (exception.retry);
a9ed2e25 4284out:
202b50dc 4285 return err;
1da177e4
LT		 4286}
4287
4288static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4289{
19e03c57 4290 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4291 unsigned char fl_flags = request->fl_flags;
8e469ebd 4292 int status = -ENOLCK;
1da177e4 4293
8e469ebd
TM		 4294 if ((fl_flags & FL_POSIX) &&
4295 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4296 goto out;
6bfc93ef 4297 /* Is this a delegated open? */
6bfc93ef
TM		 4298 status = nfs4_set_lock_state(state, request);
4299 if (status != 0)
4300 goto out;
01c3b861
TM		 4301 request->fl_flags |= FL_ACCESS;
4302 status = do_vfs_lock(request->fl_file, request);
4303 if (status < 0)
4304 goto out;
19e03c57 4305 down_read(&nfsi->rwsem);
01c3b861 4306 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4307 /* Yes: cache locks! */
01c3b861 4308 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4309 request->fl_flags = fl_flags & ~FL_SLEEP;
4310 status = do_vfs_lock(request->fl_file, request);
4311 goto out_unlock;
01c3b861 4312 }
afe6c27c 4313 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4314 if (status != 0)
01c3b861 4315 goto out_unlock;
6bfc93ef 4316 /* Note: we always want to sleep here! */
01c3b861 4317 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4318 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4319 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4320out_unlock:
19e03c57 4321 up_read(&nfsi->rwsem);
01c3b861
TM		 4322out:
4323 request->fl_flags = fl_flags;
1da177e4
LT		 4324 return status;
4325}
4326
4327static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4328{
4329 struct nfs4_exception exception = { };
4330 int err;
4331
4332 do {
965b5d67
TM		 4333 err = _nfs4_proc_setlk(state, cmd, request);
4334 if (err == -NFS4ERR_DENIED)
4335 err = -EAGAIN;
1da177e4 4336 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4337 err, &exception);
1da177e4
LT		 4338 } while (exception.retry);
4339 return err;
4340}
4341
4342static int
4343nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4344{
4345 struct nfs_open_context *ctx;
4346 struct nfs4_state *state;
4347 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4348 int status;
4349
4350 /* verify open state */
cd3758e3 4351 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4352 state = ctx->state;
4353
4354 if (request->fl_start < 0 || request->fl_end < 0)
4355 return -EINVAL;
4356
d953126a
TM		 4357 if (IS_GETLK(cmd)) {
4358 if (state != NULL)
4359 return nfs4_proc_getlk(state, F_GETLK, request);
4360 return 0;
4361 }
1da177e4
LT		 4362
4363 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4364 return -EINVAL;
4365
d953126a
TM		 4366 if (request->fl_type == F_UNLCK) {
4367 if (state != NULL)
4368 return nfs4_proc_unlck(state, cmd, request);
4369 return 0;
4370 }
1da177e4 4371
d953126a
TM		 4372 if (state == NULL)
4373 return -ENOLCK;
1da177e4
LT		 4374 do {
4375 status = nfs4_proc_setlk(state, cmd, request);
4376 if ((status != -EAGAIN) || IS_SETLK(cmd))
4377 break;
4378 timeout = nfs4_set_lock_task_retry(timeout);
4379 status = -ERESTARTSYS;
4380 if (signalled())
4381 break;
4382 } while(status < 0);
1da177e4
LT		 4383 return status;
4384}
4385
888e694c
TM		 4386int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4387{
4388 struct nfs_server *server = NFS_SERVER(state->inode);
4389 struct nfs4_exception exception = { };
4390 int err;
4391
4392 err = nfs4_set_lock_state(state, fl);
4393 if (err != 0)
4394 goto out;
4395 do {
afe6c27c 4396 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4397 switch (err) {
4398 default:
4399 printk(KERN_ERR "%s: unhandled error %d.\n",
4400 __func__, err);
4401 case 0:
965b5d67 4402 case -ESTALE:
d5122201
TM		 4403 goto out;
4404 case -NFS4ERR_EXPIRED:
4405 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4406 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4407 nfs4_schedule_lease_recovery(server->nfs_client);
4408 goto out;
74e7bb73
RL		 4409 case -NFS4ERR_BADSESSION:
4410 case -NFS4ERR_BADSLOT:
4411 case -NFS4ERR_BAD_HIGH_SLOT:
4412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4413 case -NFS4ERR_DEADSESSION:
0400a6b0 4414 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4415 goto out;
965b5d67
TM		 4416 case -ERESTARTSYS:
4417 /*
4418 * The show must go on: exit, but mark the
4419 * stateid as needing recovery.
4420 */
4421 case -NFS4ERR_ADMIN_REVOKED:
4422 case -NFS4ERR_BAD_STATEID:
4423 case -NFS4ERR_OPENMODE:
0400a6b0 4424 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4425 err = 0;
4426 goto out;
168667c4
TM		 4427 case -EKEYEXPIRED:
4428 /*
4429 * User RPCSEC_GSS context has expired.
4430 * We cannot recover this stateid now, so
4431 * skip it and allow recovery thread to
4432 * proceed.
4433 */
4434 err = 0;
4435 goto out;
965b5d67
TM		 4436 case -ENOMEM:
4437 case -NFS4ERR_DENIED:
4438 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4439 err = 0;
4440 goto out;
d5122201
TM		 4441 case -NFS4ERR_DELAY:
4442 break;
4443 }
888e694c
TM		 4444 err = nfs4_handle_exception(server, err, &exception);
4445 } while (exception.retry);
4446out:
4447 return err;
4448}
6b3b5496 4449
d3c7b7cc
TM		 4450static void nfs4_release_lockowner_release(void *calldata)
4451{
4452 kfree(calldata);
4453}
4454
4455const struct rpc_call_ops nfs4_release_lockowner_ops = {
4456 .rpc_release = nfs4_release_lockowner_release,
4457};
4458
4459void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4460{
4461 struct nfs_server *server = lsp->ls_state->owner->so_server;
4462 struct nfs_release_lockowner_args *args;
4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4465 };
4466
4467 if (server->nfs_client->cl_mvops->minor_version != 0)
4468 return;
4469 args = kmalloc(sizeof(*args), GFP_NOFS);
4470 if (!args)
4471 return;
4472 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4473 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4474 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4475 msg.rpc_argp = args;
4476 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4477}
4478
aa1870af
BF		 4479#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4480
64c2ce8b
AK		 4481static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4482 const void *buf, size_t buflen,
4483 int flags, int type)
6b3b5496 4484{
64c2ce8b
AK		 4485 if (strcmp(key, "") != 0)
4486 return -EINVAL;
4b580ee3 4487
64c2ce8b 4488 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4489}
4490
64c2ce8b
AK		 4491static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4492 void *buf, size_t buflen, int type)
6b3b5496 4493{
64c2ce8b
AK		 4494 if (strcmp(key, "") != 0)
4495 return -EINVAL;
aa1870af 4496
64c2ce8b 4497 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4498}
4499
64c2ce8b
AK		 4500static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4501 size_t list_len, const char *name,
4502 size_t name_len, int type)
6b3b5496 4503{
64c2ce8b 4504 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4505
096455a2
BF		 4506 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4507 return 0;
64c2ce8b
AK		 4508
4509 if (list && len <= list_len)
4510 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4511 return len;
6b3b5496
BF		 4512}
4513
69aaaae1
TM		 4514static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4515{
4516 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4517 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4518 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4519 return;
4520
4521 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4522 NFS_ATTR_FATTR_NLINK;
4523 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4524 fattr->nlink = 2;
4525}
4526
56659e99 4527int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4528 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4529{
4530 struct nfs_server *server = NFS_SERVER(dir);
4531 u32 bitmask[2] = {
361e624f
MN		 4532 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4533 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4534 };
4535 struct nfs4_fs_locations_arg args = {
4536 .dir_fh = NFS_FH(dir),
c228fd3a 4537 .name = name,
683b57b4
TM		 4538 .page = page,
4539 .bitmask = bitmask,
4540 };
22958463
BH		 4541 struct nfs4_fs_locations_res res = {
4542 .fs_locations = fs_locations,
4543 };
683b57b4
TM		 4544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4546 .rpc_argp = &args,
22958463 4547 .rpc_resp = &res,
683b57b4
TM		 4548 };
4549 int status;
4550
3110ff80 4551 dprintk("%s: start\n", __func__);
c228fd3a 4552 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4553 fs_locations->server = server;
830b8e33 4554 fs_locations->nlocations = 0;
cccef3b9 4555 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4556 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4557 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4558 return status;
4559}
4560
557134a3 4561#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4562/*
4563 * Check the exchange flags returned by the server for invalid flags, having
4564 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4565 * DS flags set.
4566 */
4567static int nfs4_check_cl_exchange_flags(u32 flags)
4568{
4569 if (flags & ~EXCHGID4_FLAG_MASK_R)
4570 goto out_inval;
4571 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4572 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4573 goto out_inval;
4574 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4575 goto out_inval;
4576 return NFS_OK;
4577out_inval:
4578 return -NFS4ERR_INVAL;
4579}
4580
99fe60d0
BH		 4581/*
4582 * nfs4_proc_exchange_id()
4583 *
4584 * Since the clientid has expired, all compounds using sessions
4585 * associated with the stale clientid will be returning
4586 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4587 * be in some phase of session reset.
4588 */
4d643d1d 4589int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4590{
4591 nfs4_verifier verifier;
4592 struct nfs41_exchange_id_args args = {
4593 .client = clp,
357f54d6 4594 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4595 };
4596 struct nfs41_exchange_id_res res = {
4597 .client = clp,
4598 };
4599 int status;
4600 struct rpc_message msg = {
4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4602 .rpc_argp = &args,
4603 .rpc_resp = &res,
4604 .rpc_cred = cred,
4605 };
4606 __be32 *p;
4607
4608 dprintk("--> %s\n", __func__);
4609 BUG_ON(clp == NULL);
a7b72103 4610
99fe60d0
BH		 4611 p = (u32 *)verifier.data;
4612 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4613 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4614 args.verifier = &verifier;
4615
c7a360b0
AA		 4616 args.id_len = scnprintf(args.id, sizeof(args.id),
4617 "%s/%s.%s/%u",
4618 clp->cl_ipaddr,
4619 init_utsname()->nodename,
4620 init_utsname()->domainname,
4621 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4622
c7a360b0
AA		 4623 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4624 if (!status)
4625 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4626 dprintk("<-- %s status= %d\n", __func__, status);
4627 return status;
4628}
4629
2050f0cc
AA		 4630struct nfs4_get_lease_time_data {
4631 struct nfs4_get_lease_time_args *args;
4632 struct nfs4_get_lease_time_res *res;
4633 struct nfs_client *clp;
4634};
4635
4636static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4637 void *calldata)
4638{
4639 int ret;
4640 struct nfs4_get_lease_time_data *data =
4641 (struct nfs4_get_lease_time_data *)calldata;
4642
4643 dprintk("--> %s\n", __func__);
689cf5c1 4644 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4645 /* just setup sequence, do not trigger session recovery
4646 since we're invoked within one */
4647 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4648 &data->args->la_seq_args,
4649 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4650
4651 BUG_ON(ret == -EAGAIN);
4652 rpc_call_start(task);
4653 dprintk("<-- %s\n", __func__);
4654}
4655
4656/*
4657 * Called from nfs4_state_manager thread for session setup, so don't recover
4658 * from sequence operation or clientid errors.
4659 */
4660static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4661{
4662 struct nfs4_get_lease_time_data *data =
4663 (struct nfs4_get_lease_time_data *)calldata;
4664
4665 dprintk("--> %s\n", __func__);
14516c3a
TM		 4666 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4667 return;
2050f0cc
AA		 4668 switch (task->tk_status) {
4669 case -NFS4ERR_DELAY:
4670 case -NFS4ERR_GRACE:
4671 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4672 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4673 task->tk_status = 0;
0110ee15 4674 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4675 return;
4676 }
2050f0cc
AA		 4677 dprintk("<-- %s\n", __func__);
4678}
4679
4680struct rpc_call_ops nfs4_get_lease_time_ops = {
4681 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4682 .rpc_call_done = nfs4_get_lease_time_done,
4683};
4684
4685int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4686{
4687 struct rpc_task *task;
4688 struct nfs4_get_lease_time_args args;
4689 struct nfs4_get_lease_time_res res = {
4690 .lr_fsinfo = fsinfo,
4691 };
4692 struct nfs4_get_lease_time_data data = {
4693 .args = &args,
4694 .res = &res,
4695 .clp = clp,
4696 };
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4699 .rpc_argp = &args,
4700 .rpc_resp = &res,
4701 };
4702 struct rpc_task_setup task_setup = {
4703 .rpc_client = clp->cl_rpcclient,
4704 .rpc_message = &msg,
4705 .callback_ops = &nfs4_get_lease_time_ops,
4706 .callback_data = &data
4707 };
4708 int status;
4709
2050f0cc
AA		 4710 dprintk("--> %s\n", __func__);
4711 task = rpc_run_task(&task_setup);
4712
4713 if (IS_ERR(task))
4714 status = PTR_ERR(task);
4715 else {
4716 status = task->tk_status;
4717 rpc_put_task(task);
4718 }
4719 dprintk("<-- %s return %d\n", __func__, status);
4720
4721 return status;
4722}
4723
b73dafa7
RL		 4724/*
4725 * Reset a slot table
4726 */
104aeba4
AA		 4727static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4728 int ivalue)
ac72b7b3 4729{
104aeba4 4730 struct nfs4_slot *new = NULL;
b73dafa7 4731 int i;
ac72b7b3
AA		 4732 int ret = 0;
4733
104aeba4
AA		 4734 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4735 max_reqs, tbl->max_slots);
ac72b7b3 4736
104aeba4
AA		 4737 /* Does the newly negotiated max_reqs match the existing slot table? */
4738 if (max_reqs != tbl->max_slots) {
4739 ret = -ENOMEM;
4740 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4741 GFP_NOFS);
104aeba4
AA		 4742 if (!new)
4743 goto out;
4744 ret = 0;
4745 kfree(tbl->slots);
ac72b7b3
AA		 4746 }
4747 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4748 if (new) {
4749 tbl->slots = new;
4750 tbl->max_slots = max_reqs;
4751 }
4752 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4753 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4754 spin_unlock(&tbl->slot_tbl_lock);
4755 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4756 tbl, tbl->slots, tbl->max_slots);
4757out:
4758 dprintk("<-- %s: return %d\n", __func__, ret);
4759 return ret;
4760}
4761
b73dafa7
RL		 4762/*
4763 * Reset the forechannel and backchannel slot tables
4764 */
4765static int nfs4_reset_slot_tables(struct nfs4_session *session)
4766{
4767 int status;
4768
4769 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4770 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4771 if (status)
4772 return status;
4773
4774 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4775 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4776 return status;
4777}
4778
f8625a6a
RL		 4779/* Destroy the slot table */
4780static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4781{
4782 if (session->fc_slot_table.slots != NULL) {
4783 kfree(session->fc_slot_table.slots);
4784 session->fc_slot_table.slots = NULL;
4785 }
4786 if (session->bc_slot_table.slots != NULL) {
4787 kfree(session->bc_slot_table.slots);
4788 session->bc_slot_table.slots = NULL;
4789 }
4790 return;
4791}
4792
fc931582
AA		 4793/*
4794 * Initialize slot table
4795 */
050047ce
RL		 4796static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4797 int max_slots, int ivalue)
fc931582 4798{
fc931582
AA		 4799 struct nfs4_slot *slot;
4800 int ret = -ENOMEM;
4801
4802 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4803
050047ce 4804 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4805
8535b2be 4806 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4807 if (!slot)
4808 goto out;
fc931582
AA		 4809 ret = 0;
4810
4811 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4812 tbl->max_slots = max_slots;
4813 tbl->slots = slot;
4814 tbl->highest_used_slotid = -1; /* no slot is currently used */
4815 spin_unlock(&tbl->slot_tbl_lock);
4816 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4817 tbl, tbl->slots, tbl->max_slots);
4818out:
4819 dprintk("<-- %s: return %d\n", __func__, ret);
4820 return ret;
fc931582
AA		 4821}
4822
050047ce
RL		 4823/*
4824 * Initialize the forechannel and backchannel tables
4825 */
4826static int nfs4_init_slot_tables(struct nfs4_session *session)
4827{
f26468fb
TM		 4828 struct nfs4_slot_table *tbl;
4829 int status = 0;
050047ce 4830
f26468fb
TM		 4831 tbl = &session->fc_slot_table;
4832 if (tbl->slots == NULL) {
4833 status = nfs4_init_slot_table(tbl,
4834 session->fc_attrs.max_reqs, 1);
4835 if (status)
4836 return status;
4837 }
050047ce 4838
f26468fb
TM		 4839 tbl = &session->bc_slot_table;
4840 if (tbl->slots == NULL) {
4841 status = nfs4_init_slot_table(tbl,
4842 session->bc_attrs.max_reqs, 0);
4843 if (status)
4844 nfs4_destroy_slot_tables(session);
4845 }
f8625a6a
RL		 4846
4847 return status;
557134a3
AA		 4848}
4849
4850struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4851{
4852 struct nfs4_session *session;
4853 struct nfs4_slot_table *tbl;
4854
8535b2be 4855 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4856 if (!session)
4857 return NULL;
76db6d95 4858
557134a3 4859 tbl = &session->fc_slot_table;
9dfdf404 4860 tbl->highest_used_slotid = -1;
557134a3 4861 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4862 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 4863 init_completion(&tbl->complete);
f8625a6a
RL		 4864
4865 tbl = &session->bc_slot_table;
9dfdf404 4866 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4867 spin_lock_init(&tbl->slot_tbl_lock);
4868 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 4869 init_completion(&tbl->complete);
f8625a6a 4870
1055d76d
TM		 4871 session->session_state = 1<<NFS4_SESSION_INITING;
4872
557134a3
AA		 4873 session->clp = clp;
4874 return session;
4875}
4876
4877void nfs4_destroy_session(struct nfs4_session *session)
4878{
5a0ffe54
AA		 4879 nfs4_proc_destroy_session(session);
4880 dprintk("%s Destroy backchannel for xprt %p\n",
4881 __func__, session->clp->cl_rpcclient->cl_xprt);
4882 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4883 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4884 nfs4_destroy_slot_tables(session);
557134a3
AA		 4885 kfree(session);
4886}
4887
fc931582
AA		 4888/*
4889 * Initialize the values to be used by the client in CREATE_SESSION
4890 * If nfs4_init_session set the fore channel request and response sizes,
4891 * use them.
4892 *
4893 * Set the back channel max_resp_sz_cached to zero to force the client to
4894 * always set csa_cachethis to FALSE because the current implementation
4895 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4896 */
4897static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4898{
4899 struct nfs4_session *session = args->client->cl_session;
4900 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4901 mxresp_sz = session->fc_attrs.max_resp_sz;
4902
4903 if (mxrqst_sz == 0)
4904 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4905 if (mxresp_sz == 0)
4906 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4907 /* Fore channel attributes */
4908 args->fc_attrs.headerpadsz = 0;
4909 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4910 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4911 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4912 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4913
4914 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4915 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4916 __func__,
4917 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4918 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4919
4920 /* Back channel attributes */
4921 args->bc_attrs.headerpadsz = 0;
4922 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4923 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4924 args->bc_attrs.max_resp_sz_cached = 0;
4925 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4926 args->bc_attrs.max_reqs = 1;
4927
4928 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4929 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4930 __func__,
4931 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4932 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4933 args->bc_attrs.max_reqs);
4934}
4935
43c2e885 4936static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 4937{
43c2e885
BF		 4938 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4939 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4940
4941 if (rcvd->headerpadsz > sent->headerpadsz)
4942 return -EINVAL;
4943 if (rcvd->max_resp_sz > sent->max_resp_sz)
4944 return -EINVAL;
4945 /*
4946 * Our requested max_ops is the minimum we need; we're not
4947 * prepared to break up compounds into smaller pieces than that.
4948 * So, no point even trying to continue if the server won't
4949 * cooperate:
4950 */
4951 if (rcvd->max_ops < sent->max_ops)
4952 return -EINVAL;
4953 if (rcvd->max_reqs == 0)
4954 return -EINVAL;
4955 return 0;
8d35301d
AA		 4956}
4957
43c2e885
BF		 4958static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4959{
4960 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4961 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 4962
43c2e885
BF		 4963 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4964 return -EINVAL;
4965 if (rcvd->max_resp_sz < sent->max_resp_sz)
4966 return -EINVAL;
4967 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4968 return -EINVAL;
4969 /* These would render the backchannel useless: */
4970 if (rcvd->max_ops == 0)
4971 return -EINVAL;
4972 if (rcvd->max_reqs == 0)
4973 return -EINVAL;
4974 return 0;
4975}
8d35301d 4976
8d35301d
AA		 4977static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4978 struct nfs4_session *session)
4979{
43c2e885 4980 int ret;
8d35301d 4981
43c2e885
BF		 4982 ret = nfs4_verify_fore_channel_attrs(args, session);
4983 if (ret)
4984 return ret;
4985 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 4986}
4987
fc931582
AA		 4988static int _nfs4_proc_create_session(struct nfs_client *clp)
4989{
4990 struct nfs4_session *session = clp->cl_session;
4991 struct nfs41_create_session_args args = {
4992 .client = clp,
4993 .cb_program = NFS4_CALLBACK,
4994 };
4995 struct nfs41_create_session_res res = {
4996 .client = clp,
4997 };
4998 struct rpc_message msg = {
4999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5000 .rpc_argp = &args,
5001 .rpc_resp = &res,
5002 };
5003 int status;
5004
5005 nfs4_init_channel_attrs(&args);
0f91421e 5006 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5007
5008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5009
8d35301d
AA		 5010 if (!status)
5011 /* Verify the session's negotiated channel_attrs values */
5012 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5013 if (!status) {
5014 /* Increment the clientid slot sequence id */
5015 clp->cl_seqid++;
5016 }
5017
5018 return status;
5019}
5020
5021/*
5022 * Issues a CREATE_SESSION operation to the server.
5023 * It is the responsibility of the caller to verify the session is
5024 * expired before calling this routine.
5025 */
f26468fb 5026int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5027{
5028 int status;
5029 unsigned *ptr;
fc931582 5030 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5031 long timeout = 0;
5032 int err;
fc931582
AA		 5033
5034 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5035
7d6d63d6
RL		 5036 do {
5037 status = _nfs4_proc_create_session(clp);
5038 if (status == -NFS4ERR_DELAY) {
5039 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5040 if (err)
5041 status = err;
5042 }
5043 } while (status == -NFS4ERR_DELAY);
5044
fc931582
AA		 5045 if (status)
5046 goto out;
5047
f26468fb
TM		 5048 /* Init and reset the fore channel */
5049 status = nfs4_init_slot_tables(session);
5050 dprintk("slot table initialization returned %d\n", status);
5051 if (status)
5052 goto out;
5053 status = nfs4_reset_slot_tables(session);
5054 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5055 if (status)
5056 goto out;
5057
5058 ptr = (unsigned *)&session->sess_id.data[0];
5059 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5060 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5061out:
5062 dprintk("<-- %s\n", __func__);
5063 return status;
5064}
5065
0f3e66c6
AA		 5066/*
5067 * Issue the over-the-wire RPC DESTROY_SESSION.
5068 * The caller must serialize access to this routine.
5069 */
5070int nfs4_proc_destroy_session(struct nfs4_session *session)
5071{
5072 int status = 0;
5073 struct rpc_message msg;
5074
5075 dprintk("--> nfs4_proc_destroy_session\n");
5076
5077 /* session is still being setup */
5078 if (session->clp->cl_cons_state != NFS_CS_READY)
5079 return status;
5080
5081 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5082 msg.rpc_argp = session;
5083 msg.rpc_resp = NULL;
5084 msg.rpc_cred = NULL;
5085 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5086
5087 if (status)
5088 printk(KERN_WARNING
5089 "Got error %d from the server on DESTROY_SESSION. "
5090 "Session has been destroyed regardless...\n", status);
5091
5092 dprintk("<-- nfs4_proc_destroy_session\n");
5093 return status;
5094}
5095
fccba804
TM		 5096int nfs4_init_session(struct nfs_server *server)
5097{
5098 struct nfs_client *clp = server->nfs_client;
2449ea2e 5099 struct nfs4_session *session;
68bf05ef 5100 unsigned int rsize, wsize;
fccba804
TM		 5101 int ret;
5102
5103 if (!nfs4_has_session(clp))
5104 return 0;
5105
1055d76d
TM		 5106 session = clp->cl_session;
5107 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5108 return 0;
5109
68bf05ef
AA		 5110 rsize = server->rsize;
5111 if (rsize == 0)
5112 rsize = NFS_MAX_FILE_IO_SIZE;
5113 wsize = server->wsize;
5114 if (wsize == 0)
5115 wsize = NFS_MAX_FILE_IO_SIZE;
5116
68bf05ef
AA		 5117 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5118 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5119
fccba804
TM		 5120 ret = nfs4_recover_expired_lease(server);
5121 if (!ret)
5122 ret = nfs4_check_client_ready(clp);
5123 return ret;
5124}
5125
d83217c1
AA		 5126int nfs4_init_ds_session(struct nfs_client *clp)
5127{
5128 struct nfs4_session *session = clp->cl_session;
5129 int ret;
5130
5131 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5132 return 0;
5133
5134 ret = nfs4_client_recover_expired_lease(clp);
5135 if (!ret)
5136 /* Test for the DS role */
5137 if (!is_ds_client(clp))
5138 ret = -ENODEV;
5139 if (!ret)
5140 ret = nfs4_check_client_ready(clp);
5141 return ret;
5142
5143}
5144EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5145
5146
fc01cea9
AA		 5147/*
5148 * Renew the cl_session lease.
5149 */
d5f8d3fe
TM		 5150struct nfs4_sequence_data {
5151 struct nfs_client *clp;
5152 struct nfs4_sequence_args args;
5153 struct nfs4_sequence_res res;
5154};
5155
dc96aef9
AB		 5156static void nfs41_sequence_release(void *data)
5157{
d5f8d3fe
TM		 5158 struct nfs4_sequence_data *calldata = data;
5159 struct nfs_client *clp = calldata->clp;
dc96aef9 5160
7135840f
AB		 5161 if (atomic_read(&clp->cl_count) > 1)
5162 nfs4_schedule_state_renewal(clp);
5163 nfs_put_client(clp);
d5f8d3fe 5164 kfree(calldata);
dc96aef9
AB		 5165}
5166
aa5190d0
TM		 5167static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5168{
5169 switch(task->tk_status) {
5170 case -NFS4ERR_DELAY:
aa5190d0
TM		 5171 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5172 return -EAGAIN;
5173 default:
0400a6b0 5174 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5175 }
5176 return 0;
5177}
5178
dc96aef9 5179static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5180{
d5f8d3fe
TM		 5181 struct nfs4_sequence_data *calldata = data;
5182 struct nfs_client *clp = calldata->clp;
fc01cea9 5183
14516c3a
TM		 5184 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5185 return;
fc01cea9
AA		 5186
5187 if (task->tk_status < 0) {
5188 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5189 if (atomic_read(&clp->cl_count) == 1)
5190 goto out;
fc01cea9 5191
aa5190d0
TM		 5192 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5193 rpc_restart_call_prepare(task);
fc01cea9
AA		 5194 return;
5195 }
5196 }
fc01cea9 5197 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5198out:
fc01cea9
AA		 5199 dprintk("<-- %s\n", __func__);
5200}
5201
5202static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5203{
d5f8d3fe
TM		 5204 struct nfs4_sequence_data *calldata = data;
5205 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5206 struct nfs4_sequence_args *args;
5207 struct nfs4_sequence_res *res;
5208
fc01cea9
AA		 5209 args = task->tk_msg.rpc_argp;
5210 res = task->tk_msg.rpc_resp;
5211
035168ab 5212 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5213 return;
5214 rpc_call_start(task);
5215}
5216
5217static const struct rpc_call_ops nfs41_sequence_ops = {
5218 .rpc_call_done = nfs41_sequence_call_done,
5219 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5220 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5221};
5222
71ac6da9 5223static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5224{
d5f8d3fe 5225 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5226 struct rpc_message msg = {
5227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5228 .rpc_cred = cred,
5229 };
71ac6da9
TM		 5230 struct rpc_task_setup task_setup_data = {
5231 .rpc_client = clp->cl_rpcclient,
5232 .rpc_message = &msg,
5233 .callback_ops = &nfs41_sequence_ops,
5234 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5235 };
fc01cea9 5236
7135840f 5237 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5238 return ERR_PTR(-EIO);
dfb4f309 5239 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5240 if (calldata == NULL) {
7135840f 5241 nfs_put_client(clp);
71ac6da9 5242 return ERR_PTR(-ENOMEM);
fc01cea9 5243 }
d5f8d3fe
TM		 5244 msg.rpc_argp = &calldata->args;
5245 msg.rpc_resp = &calldata->res;
5246 calldata->clp = clp;
71ac6da9 5247 task_setup_data.callback_data = calldata;
fc01cea9 5248
71ac6da9
TM		 5249 return rpc_run_task(&task_setup_data);
5250}
5251
5252static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5253{
5254 struct rpc_task *task;
5255 int ret = 0;
5256
5257 task = _nfs41_proc_sequence(clp, cred);
5258 if (IS_ERR(task))
5259 ret = PTR_ERR(task);
5260 else
bf294b41 5261 rpc_put_task_async(task);
71ac6da9
TM		 5262 dprintk("<-- %s status=%d\n", __func__, ret);
5263 return ret;
5264}
5265
5266static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5267{
5268 struct rpc_task *task;
5269 int ret;
5270
5271 task = _nfs41_proc_sequence(clp, cred);
5272 if (IS_ERR(task)) {
5273 ret = PTR_ERR(task);
5274 goto out;
5275 }
5276 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5277 if (!ret) {
5278 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5279
5280 if (task->tk_status == 0)
5281 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5282 ret = task->tk_status;
b4410c2f 5283 }
71ac6da9
TM		 5284 rpc_put_task(task);
5285out:
5286 dprintk("<-- %s status=%d\n", __func__, ret);
5287 return ret;
fc01cea9
AA		 5288}
5289
fce5c838
RL		 5290struct nfs4_reclaim_complete_data {
5291 struct nfs_client *clp;
5292 struct nfs41_reclaim_complete_args arg;
5293 struct nfs41_reclaim_complete_res res;
5294};
5295
5296static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5297{
5298 struct nfs4_reclaim_complete_data *calldata = data;
5299
b257957e 5300 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5301 if (nfs41_setup_sequence(calldata->clp->cl_session,
5302 &calldata->arg.seq_args,
fce5c838
RL		 5303 &calldata->res.seq_res, 0, task))
5304 return;
5305
5306 rpc_call_start(task);
5307}
5308
aa5190d0
TM		 5309static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5310{
5311 switch(task->tk_status) {
5312 case 0:
5313 case -NFS4ERR_COMPLETE_ALREADY:
5314 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5315 break;
5316 case -NFS4ERR_DELAY:
aa5190d0
TM		 5317 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5318 return -EAGAIN;
5319 default:
0400a6b0 5320 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5321 }
5322 return 0;
5323}
5324
fce5c838
RL		 5325static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5326{
5327 struct nfs4_reclaim_complete_data *calldata = data;
5328 struct nfs_client *clp = calldata->clp;
5329 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5330
5331 dprintk("--> %s\n", __func__);
14516c3a
TM		 5332 if (!nfs41_sequence_done(task, res))
5333 return;
fce5c838 5334
aa5190d0
TM		 5335 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5336 rpc_restart_call_prepare(task);
5337 return;
5338 }
fce5c838
RL		 5339 dprintk("<-- %s\n", __func__);
5340}
5341
5342static void nfs4_free_reclaim_complete_data(void *data)
5343{
5344 struct nfs4_reclaim_complete_data *calldata = data;
5345
5346 kfree(calldata);
5347}
5348
5349static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5350 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5351 .rpc_call_done = nfs4_reclaim_complete_done,
5352 .rpc_release = nfs4_free_reclaim_complete_data,
5353};
5354
5355/*
5356 * Issue a global reclaim complete.
5357 */
5358static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5359{
5360 struct nfs4_reclaim_complete_data *calldata;
5361 struct rpc_task *task;
5362 struct rpc_message msg = {
5363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5364 };
5365 struct rpc_task_setup task_setup_data = {
5366 .rpc_client = clp->cl_rpcclient,
5367 .rpc_message = &msg,
5368 .callback_ops = &nfs4_reclaim_complete_call_ops,
5369 .flags = RPC_TASK_ASYNC,
5370 };
5371 int status = -ENOMEM;
5372
5373 dprintk("--> %s\n", __func__);
8535b2be 5374 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5375 if (calldata == NULL)
5376 goto out;
5377 calldata->clp = clp;
5378 calldata->arg.one_fs = 0;
fce5c838
RL		 5379
5380 msg.rpc_argp = &calldata->arg;
5381 msg.rpc_resp = &calldata->res;
5382 task_setup_data.callback_data = calldata;
5383 task = rpc_run_task(&task_setup_data);
acf82b85 5384 if (IS_ERR(task)) {
fce5c838 5385 status = PTR_ERR(task);
acf82b85
DC		 5386 goto out;
5387 }
c34c32ea
AA		 5388 status = nfs4_wait_for_completion_rpc_task(task);
5389 if (status == 0)
5390 status = task->tk_status;
fce5c838 5391 rpc_put_task(task);
acf82b85 5392 return 0;
fce5c838
RL		 5393out:
5394 dprintk("<-- %s status=%d\n", __func__, status);
5395 return status;
5396}
b1f69b75
AA		 5397
5398static void
5399nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5400{
5401 struct nfs4_layoutget *lgp = calldata;
c31663d4 5402 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5403
5404 dprintk("--> %s\n", __func__);
c31663d4
FI		 5405 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5406 * right now covering the LAYOUTGET we are about to send.
5407 * However, that is not so catastrophic, and there seems
5408 * to be no way to prevent it completely.
5409 */
b1f69b75
AA		 5410 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5411 &lgp->res.seq_res, 0, task))
5412 return;
cf7d63f1
FI		 5413 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5414 NFS_I(lgp->args.inode)->layout,
5415 lgp->args.ctx->state)) {
5416 rpc_exit(task, NFS4_OK);
5417 return;
5418 }
b1f69b75
AA		 5419 rpc_call_start(task);
5420}
5421
5422static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5423{
5424 struct nfs4_layoutget *lgp = calldata;
5425 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5426
5427 dprintk("--> %s\n", __func__);
5428
5429 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5430 return;
5431
5432 switch (task->tk_status) {
5433 case 0:
5434 break;
5435 case -NFS4ERR_LAYOUTTRYLATER:
5436 case -NFS4ERR_RECALLCONFLICT:
5437 task->tk_status = -NFS4ERR_DELAY;
5438 /* Fall through */
5439 default:
5440 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5441 rpc_restart_call_prepare(task);
5442 return;
5443 }
5444 }
b1f69b75
AA		 5445 dprintk("<-- %s\n", __func__);
5446}
5447
5448static void nfs4_layoutget_release(void *calldata)
5449{
5450 struct nfs4_layoutget *lgp = calldata;
5451
5452 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5453 if (lgp->res.layout.buf != NULL)
5454 free_page((unsigned long) lgp->res.layout.buf);
5455 put_nfs_open_context(lgp->args.ctx);
5456 kfree(calldata);
5457 dprintk("<-- %s\n", __func__);
5458}
5459
5460static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5461 .rpc_call_prepare = nfs4_layoutget_prepare,
5462 .rpc_call_done = nfs4_layoutget_done,
5463 .rpc_release = nfs4_layoutget_release,
5464};
5465
5466int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5467{
5468 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5469 struct rpc_task *task;
5470 struct rpc_message msg = {
5471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5472 .rpc_argp = &lgp->args,
5473 .rpc_resp = &lgp->res,
5474 };
5475 struct rpc_task_setup task_setup_data = {
5476 .rpc_client = server->client,
5477 .rpc_message = &msg,
5478 .callback_ops = &nfs4_layoutget_call_ops,
5479 .callback_data = lgp,
5480 .flags = RPC_TASK_ASYNC,
5481 };
5482 int status = 0;
5483
5484 dprintk("--> %s\n", __func__);
5485
5486 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5487 if (lgp->res.layout.buf == NULL) {
5488 nfs4_layoutget_release(lgp);
5489 return -ENOMEM;
5490 }
5491
5492 lgp->res.seq_res.sr_slot = NULL;
5493 task = rpc_run_task(&task_setup_data);
5494 if (IS_ERR(task))
5495 return PTR_ERR(task);
5496 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5497 if (status == 0)
5498 status = task->tk_status;
5499 if (status == 0)
5500 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5501 rpc_put_task(task);
5502 dprintk("<-- %s status=%d\n", __func__, status);
5503 return status;
5504}
5505
5506static int
5507_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5508{
5509 struct nfs4_getdeviceinfo_args args = {
5510 .pdev = pdev,
5511 };
5512 struct nfs4_getdeviceinfo_res res = {
5513 .pdev = pdev,
5514 };
5515 struct rpc_message msg = {
5516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5517 .rpc_argp = &args,
5518 .rpc_resp = &res,
5519 };
5520 int status;
5521
5522 dprintk("--> %s\n", __func__);
5523 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5524 dprintk("<-- %s status=%d\n", __func__, status);
5525
5526 return status;
5527}
5528
5529int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5530{
5531 struct nfs4_exception exception = { };
5532 int err;
5533
5534 do {
5535 err = nfs4_handle_exception(server,
5536 _nfs4_proc_getdeviceinfo(server, pdev),
5537 &exception);
5538 } while (exception.retry);
5539 return err;
5540}
5541EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5542
557134a3
AA		 5543#endif /* CONFIG_NFS_V4_1 */
5544
591d71cb 5545struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5546 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5547 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5548 .recover_open = nfs4_open_reclaim,
5549 .recover_lock = nfs4_lock_reclaim,
591d71cb 5550 .establish_clid = nfs4_init_clientid,
90a16617 5551 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5552};
5553
591d71cb
AA		 5554#if defined(CONFIG_NFS_V4_1)
5555struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5556 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5557 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5558 .recover_open = nfs4_open_reclaim,
5559 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5560 .establish_clid = nfs41_init_clientid,
b4b82607 5561 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5562 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5563};
5564#endif /* CONFIG_NFS_V4_1 */
5565
5566struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5567 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5568 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5569 .recover_open = nfs4_open_expired,
5570 .recover_lock = nfs4_lock_expired,
5571 .establish_clid = nfs4_init_clientid,
90a16617 5572 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5573};
5574
5575#if defined(CONFIG_NFS_V4_1)
5576struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5577 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5578 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5579 .recover_open = nfs4_open_expired,
5580 .recover_lock = nfs4_lock_expired,
4d643d1d 5581 .establish_clid = nfs41_init_clientid,
b4b82607 5582 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5583};
591d71cb 5584#endif /* CONFIG_NFS_V4_1 */
1da177e4 5585
29fba38b
BH		 5586struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5587 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5588 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5589 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5590};
5591
5592#if defined(CONFIG_NFS_V4_1)
5593struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5594 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5595 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5596 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5597};
5598#endif
5599
97dc1359
TM		 5600static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5601 .minor_version = 0,
5602 .call_sync = _nfs4_call_sync,
e047a10c 5603 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5604 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5605 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5606 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5607};
5608
5609#if defined(CONFIG_NFS_V4_1)
5610static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5611 .minor_version = 1,
5612 .call_sync = _nfs4_call_sync_session,
e047a10c 5613 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5614 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5615 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5616 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5617};
5618#endif
5619
97dc1359
TM		 5620const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5621 [0] = &nfs_v4_0_minor_ops,
5622#if defined(CONFIG_NFS_V4_1)
5623 [1] = &nfs_v4_1_minor_ops,
5624#endif
5625};
5626
92e1d5be 5627static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5628 .permission = nfs_permission,
5629 .getattr = nfs_getattr,
5630 .setattr = nfs_setattr,
64c2ce8b
AK		 5631 .getxattr = generic_getxattr,
5632 .setxattr = generic_setxattr,
5633 .listxattr = generic_listxattr,
5634 .removexattr = generic_removexattr,
6b3b5496
BF		 5635};
5636
509de811 5637const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5638 .version = 4, /* protocol version */
5639 .dentry_ops = &nfs4_dentry_operations,
5640 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5641 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5642 .getroot = nfs4_proc_get_root,
5643 .getattr = nfs4_proc_getattr,
5644 .setattr = nfs4_proc_setattr,
2b3de441 5645 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5646 .lookup = nfs4_proc_lookup,
5647 .access = nfs4_proc_access,
5648 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5649 .create = nfs4_proc_create,
5650 .remove = nfs4_proc_remove,
5651 .unlink_setup = nfs4_proc_unlink_setup,
5652 .unlink_done = nfs4_proc_unlink_done,
5653 .rename = nfs4_proc_rename,
d3d4152a
JL		 5654 .rename_setup = nfs4_proc_rename_setup,
5655 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5656 .link = nfs4_proc_link,
5657 .symlink = nfs4_proc_symlink,
5658 .mkdir = nfs4_proc_mkdir,
5659 .rmdir = nfs4_proc_remove,
5660 .readdir = nfs4_proc_readdir,
5661 .mknod = nfs4_proc_mknod,
5662 .statfs = nfs4_proc_statfs,
5663 .fsinfo = nfs4_proc_fsinfo,
5664 .pathconf = nfs4_proc_pathconf,
e9326dca 5665 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5666 .decode_dirent = nfs4_decode_dirent,
5667 .read_setup = nfs4_proc_read_setup,
ec06c096 5668 .read_done = nfs4_read_done,
1da177e4 5669 .write_setup = nfs4_proc_write_setup,
788e7a89 5670 .write_done = nfs4_write_done,
1da177e4 5671 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5672 .commit_done = nfs4_commit_done,
1da177e4 5673 .lock = nfs4_proc_lock,
e50a1c2e 5674 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5675 .close_context = nfs4_close_context,
2b484297 5676 .open_context = nfs4_atomic_open,
45a52a02 5677 .init_client = nfs4_init_client,
1da177e4
LT		 5678};
5679
64c2ce8b
AK		 5680static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5681 .prefix = XATTR_NAME_NFSV4_ACL,
5682 .list = nfs4_xattr_list_nfs4_acl,
5683 .get = nfs4_xattr_get_nfs4_acl,
5684 .set = nfs4_xattr_set_nfs4_acl,
5685};
5686
5687const struct xattr_handler *nfs4_xattr_handlers[] = {
5688 &nfs4_xattr_nfs4_acl_handler,
5689 NULL
5690};
5691
1da177e4
LT		 5692/*
5693 * Local variables:
5694 * c-basic-offset: 8
5695 * End:
5696 */
Linux 6.x block layer and io_uring tree(s)