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NFSv4.1: put_layout_hdr can remove nfsi->layout
[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
ce5039c1
AA		 508static int nfs41_setup_sequence(struct nfs4_session *session,
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}
574
035168ab 575int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 576 struct nfs4_sequence_args *args,
577 struct nfs4_sequence_res *res,
578 int cache_reply,
579 struct rpc_task *task)
580{
035168ab 581 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 582 int ret = 0;
583
035168ab
TM		 584 if (session == NULL) {
585 args->sa_session = NULL;
586 res->sr_session = NULL;
587 goto out;
588 }
589
12364a4f 590 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 591 __func__, session->clp, session, res->sr_slot ?
592 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 593
035168ab 594 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 595 task);
ce5039c1
AA		 596out:
597 dprintk("<-- %s status=%d\n", __func__, ret);
598 return ret;
599}
600
601struct nfs41_call_sync_data {
035168ab 602 const struct nfs_server *seq_server;
ce5039c1
AA		 603 struct nfs4_sequence_args *seq_args;
604 struct nfs4_sequence_res *seq_res;
605 int cache_reply;
606};
607
608static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
609{
610 struct nfs41_call_sync_data *data = calldata;
611
035168ab
TM		 612 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
613
614 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 615 data->seq_res, data->cache_reply, task))
616 return;
617 rpc_call_start(task);
618}
619
b257957e
AB		 620static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
621{
622 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
623 nfs41_call_sync_prepare(task, calldata);
624}
625
69ab40c4
AA		 626static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
627{
628 struct nfs41_call_sync_data *data = calldata;
629
14516c3a 630 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 631}
632
ce5039c1
AA		 633struct rpc_call_ops nfs41_call_sync_ops = {
634 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 635 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 636};
637
b257957e
AB		 638struct rpc_call_ops nfs41_call_priv_sync_ops = {
639 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
640 .rpc_call_done = nfs41_call_sync_done,
641};
642
035168ab 643static int nfs4_call_sync_sequence(struct nfs_server *server,
ce5039c1
AA		 644 struct rpc_message *msg,
645 struct nfs4_sequence_args *args,
646 struct nfs4_sequence_res *res,
b257957e
AB		 647 int cache_reply,
648 int privileged)
ce5039c1
AA		 649{
650 int ret;
651 struct rpc_task *task;
652 struct nfs41_call_sync_data data = {
035168ab 653 .seq_server = server,
ce5039c1
AA		 654 .seq_args = args,
655 .seq_res = res,
656 .cache_reply = cache_reply,
657 };
658 struct rpc_task_setup task_setup = {
035168ab 659 .rpc_client = server->client,
ce5039c1
AA		 660 .rpc_message = msg,
661 .callback_ops = &nfs41_call_sync_ops,
662 .callback_data = &data
663 };
664
dfb4f309 665 res->sr_slot = NULL;
b257957e
AB		 666 if (privileged)
667 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 668 task = rpc_run_task(&task_setup);
669 if (IS_ERR(task))
670 ret = PTR_ERR(task);
671 else {
672 ret = task->tk_status;
673 rpc_put_task(task);
674 }
675 return ret;
676}
677
cccef3b9
AA		 678int _nfs4_call_sync_session(struct nfs_server *server,
679 struct rpc_message *msg,
680 struct nfs4_sequence_args *args,
681 struct nfs4_sequence_res *res,
682 int cache_reply)
683{
035168ab 684 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 685}
686
df896455 687#else
14516c3a
TM		 688static int nfs4_sequence_done(struct rpc_task *task,
689 struct nfs4_sequence_res *res)
df896455 690{
14516c3a 691 return 1;
df896455 692}
cccef3b9
AA		 693#endif /* CONFIG_NFS_V4_1 */
694
695int _nfs4_call_sync(struct nfs_server *server,
696 struct rpc_message *msg,
697 struct nfs4_sequence_args *args,
698 struct nfs4_sequence_res *res,
699 int cache_reply)
700{
f3752975 701 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 702 return rpc_call_sync(server->client, msg, 0);
703}
704
705#define nfs4_call_sync(server, msg, args, res, cache_reply) \
97dc1359 706 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
cccef3b9
AA		 707 &(res)->seq_res, (cache_reply))
708
38478b24 709static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 710{
38478b24 711 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 712
38478b24 713 spin_lock(&dir->i_lock);
40d24704
TM		 714 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
715 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 716 nfs_force_lookup_revalidate(dir);
40d24704 717 nfsi->change_attr = cinfo->after;
38478b24 718 spin_unlock(&dir->i_lock);
1da177e4
LT		 719}
720
e56e0b78 721struct nfs4_opendata {
c6d00e63 722 struct kref kref;
e56e0b78
TM		 723 struct nfs_openargs o_arg;
724 struct nfs_openres o_res;
cdd4e68b
TM		 725 struct nfs_open_confirmargs c_arg;
726 struct nfs_open_confirmres c_res;
e56e0b78
TM		 727 struct nfs_fattr f_attr;
728 struct nfs_fattr dir_attr;
ad389da7 729 struct path path;
e56e0b78
TM		 730 struct dentry *dir;
731 struct nfs4_state_owner *owner;
aac00a8d 732 struct nfs4_state *state;
e56e0b78 733 struct iattr attrs;
26e976a8 734 unsigned long timestamp;
3e309914 735 unsigned int rpc_done : 1;
24ac23ab
TM		 736 int rpc_status;
737 int cancelled;
e56e0b78
TM		 738};
739
2ced46c2
TM		 740
741static void nfs4_init_opendata_res(struct nfs4_opendata *p)
742{
743 p->o_res.f_attr = &p->f_attr;
744 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 745 p->o_res.seqid = p->o_arg.seqid;
746 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 747 p->o_res.server = p->o_arg.server;
748 nfs_fattr_init(&p->f_attr);
749 nfs_fattr_init(&p->dir_attr);
750}
751
ad389da7 752static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 753 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 754 const struct iattr *attrs,
755 gfp_t gfp_mask)
e56e0b78 756{
ad389da7 757 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 758 struct inode *dir = parent->d_inode;
759 struct nfs_server *server = NFS_SERVER(dir);
760 struct nfs4_opendata *p;
761
8535b2be 762 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 763 if (p == NULL)
764 goto err;
8535b2be 765 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 766 if (p->o_arg.seqid == NULL)
767 goto err_free;
f6948697
AV		 768 path_get(path);
769 p->path = *path;
e56e0b78
TM		 770 p->dir = parent;
771 p->owner = sp;
772 atomic_inc(&sp->so_count);
773 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 774 p->o_arg.open_flags = flags;
775 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 776 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 777 p->o_arg.id = sp->so_owner_id.id;
ad389da7 778 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 779 p->o_arg.server = server;
780 p->o_arg.bitmask = server->attr_bitmask;
781 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 782 if (flags & O_CREAT) {
783 u32 *s;
784
e56e0b78
TM		 785 p->o_arg.u.attrs = &p->attrs;
786 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 787 s = (u32 *) p->o_arg.u.verifier.data;
788 s[0] = jiffies;
789 s[1] = current->pid;
e56e0b78 790 }
cdd4e68b
TM		 791 p->c_arg.fh = &p->o_res.fh;
792 p->c_arg.stateid = &p->o_res.stateid;
793 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 794 nfs4_init_opendata_res(p);
c6d00e63 795 kref_init(&p->kref);
e56e0b78
TM		 796 return p;
797err_free:
798 kfree(p);
799err:
800 dput(parent);
801 return NULL;
802}
803
c6d00e63 804static void nfs4_opendata_free(struct kref *kref)
e56e0b78 805{
c6d00e63
TM		 806 struct nfs4_opendata *p = container_of(kref,
807 struct nfs4_opendata, kref);
808
809 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 810 if (p->state != NULL)
811 nfs4_put_open_state(p->state);
c6d00e63
TM		 812 nfs4_put_state_owner(p->owner);
813 dput(p->dir);
31f31db1 814 path_put(&p->path);
c6d00e63
TM		 815 kfree(p);
816}
817
818static void nfs4_opendata_put(struct nfs4_opendata *p)
819{
820 if (p != NULL)
821 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 822}
823
06f814a3
TM		 824static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
825{
06f814a3
TM		 826 int ret;
827
06f814a3 828 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 829 return ret;
830}
831
dc0b027d 832static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 833{
834 int ret = 0;
dc0b027d
TM		 835
836 if (open_mode & O_EXCL)
837 goto out;
838 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 839 case FMODE_READ:
88069f77
TM		 840 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
841 && state->n_rdonly != 0;
6ee41268
TM		 842 break;
843 case FMODE_WRITE:
88069f77
TM		 844 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
845 && state->n_wronly != 0;
6ee41268
TM		 846 break;
847 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 848 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
849 && state->n_rdwr != 0;
6ee41268 850 }
dc0b027d 851out:
6ee41268
TM		 852 return ret;
853}
854
dc0b027d 855static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 856{
dc0b027d 857 if ((delegation->type & fmode) != fmode)
aac00a8d 858 return 0;
15c831bf 859 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 860 return 0;
b7391f44 861 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 862 return 1;
863}
864
dc0b027d 865static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 866{
dc0b027d 867 switch (fmode) {
e7616923
TM		 868 case FMODE_WRITE:
869 state->n_wronly++;
870 break;
871 case FMODE_READ:
872 state->n_rdonly++;
873 break;
874 case FMODE_READ|FMODE_WRITE:
875 state->n_rdwr++;
876 }
dc0b027d 877 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 878}
879
dc0b027d 880static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 881{
882 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
883 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
884 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 885 switch (fmode) {
003707c7
TM		 886 case FMODE_READ:
887 set_bit(NFS_O_RDONLY_STATE, &state->flags);
888 break;
889 case FMODE_WRITE:
890 set_bit(NFS_O_WRONLY_STATE, &state->flags);
891 break;
892 case FMODE_READ|FMODE_WRITE:
893 set_bit(NFS_O_RDWR_STATE, &state->flags);
894 }
e7616923
TM		 895}
896
dc0b027d 897static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 898{
8bda4e4c 899 write_seqlock(&state->seqlock);
dc0b027d 900 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 901 write_sequnlock(&state->seqlock);
003707c7
TM		 902}
903
dc0b027d 904static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 905{
8bda4e4c
TM		 906 /*
907 * Protect the call to nfs4_state_set_mode_locked and
908 * serialise the stateid update
909 */
910 write_seqlock(&state->seqlock);
003707c7
TM		 911 if (deleg_stateid != NULL) {
912 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
913 set_bit(NFS_DELEGATED_STATE, &state->flags);
914 }
915 if (open_stateid != NULL)
dc0b027d 916 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 917 write_sequnlock(&state->seqlock);
918 spin_lock(&state->owner->so_lock);
dc0b027d 919 update_open_stateflags(state, fmode);
ec073428 920 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 921}
922
dc0b027d 923static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 924{
925 struct nfs_inode *nfsi = NFS_I(state->inode);
926 struct nfs_delegation *deleg_cur;
927 int ret = 0;
928
dc0b027d 929 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 930
931 rcu_read_lock();
932 deleg_cur = rcu_dereference(nfsi->delegation);
933 if (deleg_cur == NULL)
934 goto no_delegation;
935
936 spin_lock(&deleg_cur->lock);
937 if (nfsi->delegation != deleg_cur ||
dc0b027d 938 (deleg_cur->type & fmode) != fmode)
34310430
TM		 939 goto no_delegation_unlock;
940
941 if (delegation == NULL)
942 delegation = &deleg_cur->stateid;
943 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
944 goto no_delegation_unlock;
945
b7391f44 946 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 947 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 948 ret = 1;
949no_delegation_unlock:
950 spin_unlock(&deleg_cur->lock);
951no_delegation:
952 rcu_read_unlock();
953
954 if (!ret && open_stateid != NULL) {
dc0b027d 955 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 956 ret = 1;
957 }
958
959 return ret;
960}
961
962
dc0b027d 963static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 964{
965 struct nfs_delegation *delegation;
966
967 rcu_read_lock();
968 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 969 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 970 rcu_read_unlock();
971 return;
972 }
973 rcu_read_unlock();
974 nfs_inode_return_delegation(inode);
975}
976
6ee41268 977static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 978{
979 struct nfs4_state *state = opendata->state;
980 struct nfs_inode *nfsi = NFS_I(state->inode);
981 struct nfs_delegation *delegation;
dc0b027d
TM		 982 int open_mode = opendata->o_arg.open_flags & O_EXCL;
983 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 984 nfs4_stateid stateid;
985 int ret = -EAGAIN;
986
aac00a8d 987 for (;;) {
dc0b027d 988 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 989 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 990 if (can_open_cached(state, fmode, open_mode)) {
991 update_open_stateflags(state, fmode);
6ee41268 992 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 993 goto out_return_state;
994 }
995 spin_unlock(&state->owner->so_lock);
996 }
34310430
TM		 997 rcu_read_lock();
998 delegation = rcu_dereference(nfsi->delegation);
999 if (delegation == NULL ||
dc0b027d 1000 !can_open_delegated(delegation, fmode)) {
34310430 1001 rcu_read_unlock();
aac00a8d 1002 break;
34310430 1003 }
aac00a8d
TM		 1004 /* Save the delegation */
1005 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1006 rcu_read_unlock();
af22f94a 1007 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1008 if (ret != 0)
1009 goto out;
1010 ret = -EAGAIN;
34310430
TM		 1011
1012 /* Try to update the stateid using the delegation */
dc0b027d 1013 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1014 goto out_return_state;
aac00a8d 1015 }
aac00a8d
TM		 1016out:
1017 return ERR_PTR(ret);
1018out_return_state:
1019 atomic_inc(&state->count);
1020 return state;
1021}
1022
24ac23ab
TM		 1023static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1024{
1025 struct inode *inode;
1026 struct nfs4_state *state = NULL;
003707c7 1027 struct nfs_delegation *delegation;
1b370bc2 1028 int ret;
24ac23ab 1029
aac00a8d 1030 if (!data->rpc_done) {
6ee41268 1031 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1032 goto out;
1033 }
1034
1b370bc2 1035 ret = -EAGAIN;
24ac23ab 1036 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1037 goto err;
24ac23ab 1038 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1039 ret = PTR_ERR(inode);
03f28e3a 1040 if (IS_ERR(inode))
1b370bc2
TM		 1041 goto err;
1042 ret = -ENOMEM;
24ac23ab
TM		 1043 state = nfs4_get_open_state(inode, data->owner);
1044 if (state == NULL)
1b370bc2 1045 goto err_put_inode;
549d6ed5 1046 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1047 int delegation_flags = 0;
1048
003707c7
TM		 1049 rcu_read_lock();
1050 delegation = rcu_dereference(NFS_I(inode)->delegation);
1051 if (delegation)
1052 delegation_flags = delegation->flags;
1053 rcu_read_unlock();
15c831bf 1054 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1055 nfs_inode_set_delegation(state->inode,
1056 data->owner->so_cred,
1057 &data->o_res);
1058 else
1059 nfs_inode_reclaim_delegation(state->inode,
1060 data->owner->so_cred,
1061 &data->o_res);
1062 }
34310430
TM		 1063
1064 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1065 data->o_arg.fmode);
24ac23ab 1066 iput(inode);
aac00a8d 1067out:
24ac23ab 1068 return state;
1b370bc2
TM		 1069err_put_inode:
1070 iput(inode);
1071err:
1072 return ERR_PTR(ret);
24ac23ab
TM		 1073}
1074
864472e9
TM		 1075static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1076{
1077 struct nfs_inode *nfsi = NFS_I(state->inode);
1078 struct nfs_open_context *ctx;
1079
1080 spin_lock(&state->inode->i_lock);
1081 list_for_each_entry(ctx, &nfsi->open_files, list) {
1082 if (ctx->state != state)
1083 continue;
1084 get_nfs_open_context(ctx);
1085 spin_unlock(&state->inode->i_lock);
1086 return ctx;
1087 }
1088 spin_unlock(&state->inode->i_lock);
1089 return ERR_PTR(-ENOENT);
1090}
1091
6f220ed5
TM		 1092static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1093{
1094 struct nfs4_opendata *opendata;
1095
8535b2be 1096 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1097 if (opendata == NULL)
1098 return ERR_PTR(-ENOMEM);
1099 opendata->state = state;
1100 atomic_inc(&state->count);
1101 return opendata;
1102}
1103
dc0b027d 1104static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1105{
2ced46c2 1106 struct nfs4_state *newstate;
864472e9
TM		 1107 int ret;
1108
dc0b027d
TM		 1109 opendata->o_arg.open_flags = 0;
1110 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1111 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1112 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1113 nfs4_init_opendata_res(opendata);
b257957e 1114 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1115 if (ret != 0)
1116 return ret;
2ced46c2 1117 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1118 if (IS_ERR(newstate))
1119 return PTR_ERR(newstate);
dc0b027d 1120 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1121 *res = newstate;
864472e9
TM		 1122 return 0;
1123}
1124
1125static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1126{
864472e9 1127 struct nfs4_state *newstate;
864472e9
TM		 1128 int ret;
1129
1130 /* memory barrier prior to reading state->n_* */
2ced46c2 1131 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1132 smp_rmb();
1133 if (state->n_rdwr != 0) {
b0ed9dbc 1134 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1135 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1136 if (ret != 0)
1137 return ret;
2ced46c2
TM		 1138 if (newstate != state)
1139 return -ESTALE;
864472e9
TM		 1140 }
1141 if (state->n_wronly != 0) {
b0ed9dbc 1142 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1143 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1144 if (ret != 0)
1145 return ret;
2ced46c2
TM		 1146 if (newstate != state)
1147 return -ESTALE;
864472e9
TM		 1148 }
1149 if (state->n_rdonly != 0) {
b0ed9dbc 1150 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1151 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1152 if (ret != 0)
1153 return ret;
2ced46c2
TM		 1154 if (newstate != state)
1155 return -ESTALE;
864472e9 1156 }
1ac7e2fd
TM		 1157 /*
1158 * We may have performed cached opens for all three recoveries.
1159 * Check if we need to update the current stateid.
1160 */
1161 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1162 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1163 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1164 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1165 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1166 write_sequnlock(&state->seqlock);
1ac7e2fd 1167 }
864472e9
TM		 1168 return 0;
1169}
1170
1da177e4
LT		 1171/*
1172 * OPEN_RECLAIM:
1173 * reclaim state on the server after a reboot.
1da177e4 1174 */
539cd03a 1175static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1176{
1ac7e2fd 1177 struct nfs_delegation *delegation;
864472e9 1178 struct nfs4_opendata *opendata;
dc0b027d 1179 fmode_t delegation_type = 0;
1da177e4
LT		 1180 int status;
1181
6f220ed5
TM		 1182 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1183 if (IS_ERR(opendata))
1184 return PTR_ERR(opendata);
864472e9
TM		 1185 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1186 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1187 rcu_read_lock();
1188 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1189 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1190 delegation_type = delegation->type;
1ac7e2fd 1191 rcu_read_unlock();
864472e9
TM		 1192 opendata->o_arg.u.delegation_type = delegation_type;
1193 status = nfs4_open_recover(opendata, state);
c6d00e63 1194 nfs4_opendata_put(opendata);
1da177e4
LT		 1195 return status;
1196}
1197
539cd03a 1198static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1199{
1200 struct nfs_server *server = NFS_SERVER(state->inode);
1201 struct nfs4_exception exception = { };
1202 int err;
1203 do {
539cd03a 1204 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1205 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1206 break;
1207 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1208 } while (exception.retry);
1209 return err;
1210}
1211
864472e9
TM		 1212static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1213{
1214 struct nfs_open_context *ctx;
1215 int ret;
1216
1217 ctx = nfs4_state_find_open_context(state);
1218 if (IS_ERR(ctx))
1219 return PTR_ERR(ctx);
539cd03a 1220 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1221 put_nfs_open_context(ctx);
1222 return ret;
1223}
1224
13437e12 1225static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1226{
e56e0b78 1227 struct nfs4_opendata *opendata;
864472e9 1228 int ret;
1da177e4 1229
6f220ed5
TM		 1230 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1231 if (IS_ERR(opendata))
1232 return PTR_ERR(opendata);
e56e0b78 1233 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1234 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1235 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1236 ret = nfs4_open_recover(opendata, state);
c6d00e63 1237 nfs4_opendata_put(opendata);
864472e9 1238 return ret;
1da177e4
LT		 1239}
1240
13437e12 1241int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1242{
1243 struct nfs4_exception exception = { };
539cd03a 1244 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1245 int err;
1246 do {
13437e12 1247 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1248 switch (err) {
1249 case 0:
965b5d67
TM		 1250 case -ENOENT:
1251 case -ESTALE:
1252 goto out;
bcfa49f6
RL		 1253 case -NFS4ERR_BADSESSION:
1254 case -NFS4ERR_BADSLOT:
1255 case -NFS4ERR_BAD_HIGH_SLOT:
1256 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1257 case -NFS4ERR_DEADSESSION:
0400a6b0 1258 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1259 goto out;
1da177e4
LT		 1260 case -NFS4ERR_STALE_CLIENTID:
1261 case -NFS4ERR_STALE_STATEID:
1262 case -NFS4ERR_EXPIRED:
1263 /* Don't recall a delegation if it was lost */
0400a6b0 1264 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1265 goto out;
1266 case -ERESTARTSYS:
1267 /*
1268 * The show must go on: exit, but mark the
1269 * stateid as needing recovery.
1270 */
1271 case -NFS4ERR_ADMIN_REVOKED:
1272 case -NFS4ERR_BAD_STATEID:
0400a6b0 1273 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1274 case -EKEYEXPIRED:
1275 /*
1276 * User RPCSEC_GSS context has expired.
1277 * We cannot recover this stateid now, so
1278 * skip it and allow recovery thread to
1279 * proceed.
1280 */
965b5d67
TM		 1281 case -ENOMEM:
1282 err = 0;
1283 goto out;
1da177e4
LT		 1284 }
1285 err = nfs4_handle_exception(server, err, &exception);
1286 } while (exception.retry);
965b5d67 1287out:
1da177e4
LT		 1288 return err;
1289}
1290
cdd4e68b
TM		 1291static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1292{
1293 struct nfs4_opendata *data = calldata;
1294
1295 data->rpc_status = task->tk_status;
26e976a8 1296 if (data->rpc_status == 0) {
cdd4e68b
TM		 1297 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1298 sizeof(data->o_res.stateid.data));
bb22629e 1299 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1300 renew_lease(data->o_res.server, data->timestamp);
3e309914 1301 data->rpc_done = 1;
26e976a8 1302 }
cdd4e68b
TM		 1303}
1304
1305static void nfs4_open_confirm_release(void *calldata)
1306{
1307 struct nfs4_opendata *data = calldata;
1308 struct nfs4_state *state = NULL;
1309
1310 /* If this request hasn't been cancelled, do nothing */
1311 if (data->cancelled == 0)
1312 goto out_free;
1313 /* In case of error, no cleanup! */
3e309914 1314 if (!data->rpc_done)
cdd4e68b 1315 goto out_free;
cdd4e68b 1316 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1317 if (!IS_ERR(state))
dc0b027d 1318 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1319out_free:
c6d00e63 1320 nfs4_opendata_put(data);
cdd4e68b
TM		 1321}
1322
1323static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1324 .rpc_call_done = nfs4_open_confirm_done,
1325 .rpc_release = nfs4_open_confirm_release,
1326};
1327
1328/*
1329 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1330 */
1331static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1332{
1333 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1334 struct rpc_task *task;
5138fde0
TM		 1335 struct rpc_message msg = {
1336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1337 .rpc_argp = &data->c_arg,
1338 .rpc_resp = &data->c_res,
1339 .rpc_cred = data->owner->so_cred,
1340 };
c970aa85
TM		 1341 struct rpc_task_setup task_setup_data = {
1342 .rpc_client = server->client,
5138fde0 1343 .rpc_message = &msg,
c970aa85
TM		 1344 .callback_ops = &nfs4_open_confirm_ops,
1345 .callback_data = data,
101070ca 1346 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1347 .flags = RPC_TASK_ASYNC,
1348 };
1da177e4
LT		 1349 int status;
1350
c6d00e63 1351 kref_get(&data->kref);
3e309914
TM		 1352 data->rpc_done = 0;
1353 data->rpc_status = 0;
5138fde0 1354 data->timestamp = jiffies;
c970aa85 1355 task = rpc_run_task(&task_setup_data);
7a1218a2 1356 if (IS_ERR(task))
cdd4e68b 1357 return PTR_ERR(task);
cdd4e68b
TM		 1358 status = nfs4_wait_for_completion_rpc_task(task);
1359 if (status != 0) {
1360 data->cancelled = 1;
1361 smp_wmb();
1362 } else
1363 status = data->rpc_status;
e6b3c4db 1364 rpc_put_task(task);
1da177e4
LT		 1365 return status;
1366}
1367
24ac23ab 1368static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1369{
24ac23ab
TM		 1370 struct nfs4_opendata *data = calldata;
1371 struct nfs4_state_owner *sp = data->owner;
5138fde0 1372
24ac23ab
TM		 1373 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1374 return;
aac00a8d
TM		 1375 /*
1376 * Check if we still need to send an OPEN call, or if we can use
1377 * a delegation instead.
1378 */
1379 if (data->state != NULL) {
1380 struct nfs_delegation *delegation;
1381
dc0b027d 1382 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1383 goto out_no_action;
aac00a8d
TM		 1384 rcu_read_lock();
1385 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1386 if (delegation != NULL &&
15c831bf 1387 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1388 rcu_read_unlock();
6ee41268 1389 goto out_no_action;
aac00a8d
TM		 1390 }
1391 rcu_read_unlock();
1392 }
24ac23ab 1393 /* Update sequence id. */
9f958ab8 1394 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1395 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1396 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1397 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1398 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1399 }
26e976a8 1400 data->timestamp = jiffies;
035168ab 1401 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1402 &data->o_arg.seq_args,
1403 &data->o_res.seq_res, 1, task))
1404 return;
5138fde0 1405 rpc_call_start(task);
6ee41268
TM		 1406 return;
1407out_no_action:
1408 task->tk_action = NULL;
1409
24ac23ab 1410}
1da177e4 1411
b257957e
AB		 1412static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1413{
1414 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1415 nfs4_open_prepare(task, calldata);
1416}
1417
24ac23ab
TM		 1418static void nfs4_open_done(struct rpc_task *task, void *calldata)
1419{
1420 struct nfs4_opendata *data = calldata;
1da177e4 1421
24ac23ab 1422 data->rpc_status = task->tk_status;
d898528c 1423
14516c3a
TM		 1424 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1425 return;
d898528c 1426
24ac23ab
TM		 1427 if (task->tk_status == 0) {
1428 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1429 case S_IFREG:
1430 break;
1431 case S_IFLNK:
24ac23ab 1432 data->rpc_status = -ELOOP;
6f926b5b
TM		 1433 break;
1434 case S_IFDIR:
24ac23ab 1435 data->rpc_status = -EISDIR;
6f926b5b
TM		 1436 break;
1437 default:
24ac23ab 1438 data->rpc_status = -ENOTDIR;
6f926b5b 1439 }
26e976a8 1440 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1441 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1442 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1443 }
3e309914 1444 data->rpc_done = 1;
24ac23ab 1445}
6f926b5b 1446
24ac23ab
TM		 1447static void nfs4_open_release(void *calldata)
1448{
1449 struct nfs4_opendata *data = calldata;
1450 struct nfs4_state *state = NULL;
1451
1452 /* If this request hasn't been cancelled, do nothing */
1453 if (data->cancelled == 0)
1454 goto out_free;
1455 /* In case of error, no cleanup! */
3e309914 1456 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1457 goto out_free;
1458 /* In case we need an open_confirm, no cleanup! */
1459 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1460 goto out_free;
24ac23ab 1461 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1462 if (!IS_ERR(state))
dc0b027d 1463 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1464out_free:
c6d00e63 1465 nfs4_opendata_put(data);
24ac23ab
TM		 1466}
1467
1468static const struct rpc_call_ops nfs4_open_ops = {
1469 .rpc_call_prepare = nfs4_open_prepare,
1470 .rpc_call_done = nfs4_open_done,
1471 .rpc_release = nfs4_open_release,
1472};
1473
b257957e
AB		 1474static const struct rpc_call_ops nfs4_recover_open_ops = {
1475 .rpc_call_prepare = nfs4_recover_open_prepare,
1476 .rpc_call_done = nfs4_open_done,
1477 .rpc_release = nfs4_open_release,
1478};
1479
1480static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1481{
1482 struct inode *dir = data->dir->d_inode;
1483 struct nfs_server *server = NFS_SERVER(dir);
1484 struct nfs_openargs *o_arg = &data->o_arg;
1485 struct nfs_openres *o_res = &data->o_res;
1486 struct rpc_task *task;
5138fde0
TM		 1487 struct rpc_message msg = {
1488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1489 .rpc_argp = o_arg,
1490 .rpc_resp = o_res,
1491 .rpc_cred = data->owner->so_cred,
1492 };
c970aa85
TM		 1493 struct rpc_task_setup task_setup_data = {
1494 .rpc_client = server->client,
5138fde0 1495 .rpc_message = &msg,
c970aa85
TM		 1496 .callback_ops = &nfs4_open_ops,
1497 .callback_data = data,
101070ca 1498 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1499 .flags = RPC_TASK_ASYNC,
1500 };
24ac23ab
TM		 1501 int status;
1502
c6d00e63 1503 kref_get(&data->kref);
3e309914
TM		 1504 data->rpc_done = 0;
1505 data->rpc_status = 0;
2ced46c2 1506 data->cancelled = 0;
b257957e
AB		 1507 if (isrecover)
1508 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1509 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1510 if (IS_ERR(task))
1511 return PTR_ERR(task);
1512 status = nfs4_wait_for_completion_rpc_task(task);
1513 if (status != 0) {
1514 data->cancelled = 1;
1515 smp_wmb();
1516 } else
1517 status = data->rpc_status;
1518 rpc_put_task(task);
1519
1520 return status;
1521}
1522
1523static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1524{
1525 struct inode *dir = data->dir->d_inode;
1526 struct nfs_openres *o_res = &data->o_res;
1527 int status;
1528
1529 status = nfs4_run_open_task(data, 1);
1530 if (status != 0 || !data->rpc_done)
1531 return status;
1532
1533 nfs_refresh_inode(dir, o_res->dir_attr);
1534
1535 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1536 status = _nfs4_proc_open_confirm(data);
1537 if (status != 0)
1538 return status;
1539 }
1540
1541 return status;
1542}
1543
1544/*
1545 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1546 */
1547static int _nfs4_proc_open(struct nfs4_opendata *data)
1548{
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1553 int status;
1554
1555 status = nfs4_run_open_task(data, 0);
3e309914 1556 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1557 return status;
1558
56ae19f3
TM		 1559 if (o_arg->open_flags & O_CREAT) {
1560 update_changeattr(dir, &o_res->cinfo);
1561 nfs_post_op_update_inode(dir, o_res->dir_attr);
1562 } else
1563 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1564 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1565 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1566 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1567 status = _nfs4_proc_open_confirm(data);
1da177e4 1568 if (status != 0)
24ac23ab 1569 return status;
1da177e4
LT		 1570 }
1571 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1572 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1573 return 0;
1da177e4
LT		 1574}
1575
10afec90 1576static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1577{
7539bbab 1578 struct nfs_client *clp = server->nfs_client;
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
1da177e4
LT		 1595/*
1596 * OPEN_EXPIRED:
1597 * reclaim state on the server after a network partition.
1598 * Assumes caller holds the appropriate lock
1599 */
539cd03a 1600static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1601{
e56e0b78 1602 struct nfs4_opendata *opendata;
864472e9 1603 int ret;
1da177e4 1604
6f220ed5
TM		 1605 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1606 if (IS_ERR(opendata))
1607 return PTR_ERR(opendata);
864472e9 1608 ret = nfs4_open_recover(opendata, state);
35d05778 1609 if (ret == -ESTALE)
539cd03a 1610 d_drop(ctx->path.dentry);
c6d00e63 1611 nfs4_opendata_put(opendata);
864472e9 1612 return ret;
1da177e4
LT		 1613}
1614
a9ed2e25 1615static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1616{
539cd03a 1617 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1618 struct nfs4_exception exception = { };
1619 int err;
1620
1621 do {
539cd03a 1622 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1623 switch (err) {
1624 default:
1625 goto out;
1626 case -NFS4ERR_GRACE:
1627 case -NFS4ERR_DELAY:
1628 nfs4_handle_exception(server, err, &exception);
1629 err = 0;
1630 }
202b50dc 1631 } while (exception.retry);
a9ed2e25 1632out:
202b50dc
TM		 1633 return err;
1634}
1635
1da177e4
LT		 1636static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1637{
1da177e4 1638 struct nfs_open_context *ctx;
864472e9 1639 int ret;
1da177e4 1640
864472e9
TM		 1641 ctx = nfs4_state_find_open_context(state);
1642 if (IS_ERR(ctx))
1643 return PTR_ERR(ctx);
539cd03a 1644 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1645 put_nfs_open_context(ctx);
1646 return ret;
1da177e4
LT		 1647}
1648
aa53ed54
JL		 1649/*
1650 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1651 * fields corresponding to attributes that were used to store the verifier.
1652 * Make sure we clobber those fields in the later setattr call
1653 */
1654static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1655{
1656 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1657 !(sattr->ia_valid & ATTR_ATIME_SET))
1658 sattr->ia_valid |= ATTR_ATIME;
1659
1660 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1661 !(sattr->ia_valid & ATTR_MTIME_SET))
1662 sattr->ia_valid |= ATTR_MTIME;
1663}
1664
1da177e4 1665/*
24ac23ab 1666 * Returns a referenced nfs4_state
1da177e4 1667 */
dc0b027d 1668static 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		 1669{
1670 struct nfs4_state_owner *sp;
1671 struct nfs4_state *state = NULL;
1672 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1673 struct nfs4_opendata *opendata;
aac00a8d 1674 int status;
1da177e4
LT		 1675
1676 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1677 status = -ENOMEM;
1678 if (!(sp = nfs4_get_state_owner(server, cred))) {
1679 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1680 goto out_err;
1681 }
58d9714a
TM		 1682 status = nfs4_recover_expired_lease(server);
1683 if (status != 0)
b4454fe1 1684 goto err_put_state_owner;
aac00a8d 1685 if (path->dentry->d_inode != NULL)
dc0b027d 1686 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1687 status = -ENOMEM;
8535b2be 1688 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1689 if (opendata == NULL)
95d35cb4 1690 goto err_put_state_owner;
1da177e4 1691
aac00a8d
TM		 1692 if (path->dentry->d_inode != NULL)
1693 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1694
24ac23ab 1695 status = _nfs4_proc_open(opendata);
1da177e4 1696 if (status != 0)
c6d00e63 1697 goto err_opendata_put;
1da177e4 1698
24ac23ab 1699 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1700 status = PTR_ERR(state);
1701 if (IS_ERR(state))
c6d00e63 1702 goto err_opendata_put;
0df5dd4a 1703 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1704 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1705
1706 if (opendata->o_arg.open_flags & O_EXCL) {
1707 nfs4_exclusive_attrset(opendata, sattr);
1708
1709 nfs_fattr_init(opendata->o_res.f_attr);
1710 status = nfs4_do_setattr(state->inode, cred,
1711 opendata->o_res.f_attr, sattr,
1712 state);
1713 if (status == 0)
1714 nfs_setattr_update_inode(state->inode, sattr);
1715 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1716 }
c6d00e63 1717 nfs4_opendata_put(opendata);
1da177e4 1718 nfs4_put_state_owner(sp);
1da177e4
LT		 1719 *res = state;
1720 return 0;
c6d00e63
TM		 1721err_opendata_put:
1722 nfs4_opendata_put(opendata);
e56e0b78
TM		 1723err_put_state_owner:
1724 nfs4_put_state_owner(sp);
1da177e4 1725out_err:
1da177e4
LT		 1726 *res = NULL;
1727 return status;
1728}
1729
1730
dc0b027d 1731static 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		 1732{
1733 struct nfs4_exception exception = { };
1734 struct nfs4_state *res;
1735 int status;
1736
1737 do {
dc0b027d 1738 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1739 if (status == 0)
1740 break;
1741 /* NOTE: BAD_SEQID means the server and client disagree about the
1742 * book-keeping w.r.t. state-changing operations
1743 * (OPEN/CLOSE/LOCK/LOCKU...)
1744 * It is actually a sign of a bug on the client or on the server.
1745 *
1746 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1747 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1748 * have unhashed the old state_owner for us, and that we can
1749 * therefore safely retry using a new one. We should still warn
1750 * the user though...
1751 */
1752 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1753 printk(KERN_WARNING "NFS: v4 server %s "
1754 " returned a bad sequence-id error!\n",
1755 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1756 exception.retry = 1;
1757 continue;
1758 }
550f5747
TM		 1759 /*
1760 * BAD_STATEID on OPEN means that the server cancelled our
1761 * state before it received the OPEN_CONFIRM.
1762 * Recover by retrying the request as per the discussion
1763 * on Page 181 of RFC3530.
1764 */
1765 if (status == -NFS4ERR_BAD_STATEID) {
1766 exception.retry = 1;
1767 continue;
1768 }
aac00a8d
TM		 1769 if (status == -EAGAIN) {
1770 /* We must have found a delegation */
1771 exception.retry = 1;
1772 continue;
1773 }
1da177e4
LT		 1774 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1775 status, &exception));
1776 } while (exception.retry);
1777 return res;
1778}
1779
659bfcd6
TM		 1780static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1781 struct nfs_fattr *fattr, struct iattr *sattr,
1782 struct nfs4_state *state)
1da177e4 1783{
3e4f6290 1784 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1785 struct nfs_setattrargs arg = {
3e4f6290 1786 .fh = NFS_FH(inode),
1da177e4
LT		 1787 .iap = sattr,
1788 .server = server,
1789 .bitmask = server->attr_bitmask,
1790 };
1791 struct nfs_setattrres res = {
1792 .fattr = fattr,
1793 .server = server,
1794 };
1795 struct rpc_message msg = {
659bfcd6
TM		 1796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1797 .rpc_argp = &arg,
1798 .rpc_resp = &res,
1799 .rpc_cred = cred,
1da177e4 1800 };
26e976a8 1801 unsigned long timestamp = jiffies;
65e4308d 1802 int status;
1da177e4 1803
0e574af1 1804 nfs_fattr_init(fattr);
1da177e4 1805
3e4f6290
TM		 1806 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1807 /* Use that stateid */
1808 } else if (state != NULL) {
77041ed9 1809 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1810 } else
1da177e4
LT		 1811 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1812
cccef3b9 1813 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1814 if (status == 0 && state != NULL)
1815 renew_lease(server, timestamp);
65e4308d 1816 return status;
1da177e4
LT		 1817}
1818
659bfcd6
TM		 1819static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1820 struct nfs_fattr *fattr, struct iattr *sattr,
1821 struct nfs4_state *state)
1da177e4 1822{
3e4f6290 1823 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1824 struct nfs4_exception exception = { };
1825 int err;
1826 do {
1827 err = nfs4_handle_exception(server,
659bfcd6 1828 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1829 &exception);
1830 } while (exception.retry);
1831 return err;
1832}
1833
1834struct nfs4_closedata {
4a35bd41 1835 struct path path;
1da177e4
LT		 1836 struct inode *inode;
1837 struct nfs4_state *state;
1838 struct nfs_closeargs arg;
1839 struct nfs_closeres res;
516a6af6 1840 struct nfs_fattr fattr;
26e976a8 1841 unsigned long timestamp;
f7e8917a
FI		 1842 bool roc;
1843 u32 roc_barrier;
1da177e4
LT		 1844};
1845
963d8fe5 1846static void nfs4_free_closedata(void *data)
9512135d 1847{
963d8fe5
TM		 1848 struct nfs4_closedata *calldata = data;
1849 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1850
f7e8917a
FI		 1851 if (calldata->roc)
1852 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1853 nfs4_put_open_state(calldata->state);
1854 nfs_free_seqid(calldata->arg.seqid);
9512135d 1855 nfs4_put_state_owner(sp);
31f31db1 1856 path_put(&calldata->path);
9512135d
TM		 1857 kfree(calldata);
1858}
1859
88069f77
TM		 1860static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1861 fmode_t fmode)
1862{
1863 spin_lock(&state->owner->so_lock);
1864 if (!(fmode & FMODE_READ))
1865 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1866 if (!(fmode & FMODE_WRITE))
1867 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1868 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1869 spin_unlock(&state->owner->so_lock);
1870}
1871
963d8fe5 1872static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1873{
963d8fe5 1874 struct nfs4_closedata *calldata = data;
1da177e4 1875 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1876 struct nfs_server *server = NFS_SERVER(calldata->inode);
1877
14516c3a
TM		 1878 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1879 return;
1da177e4
LT		 1880 /* hmm. we are done with the inode, and in the process of freeing
1881 * the state_owner. we keep this around to process errors
1882 */
1da177e4
LT		 1883 switch (task->tk_status) {
1884 case 0:
f7e8917a
FI		 1885 if (calldata->roc)
1886 pnfs_roc_set_barrier(state->inode,
1887 calldata->roc_barrier);
45328c35 1888 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1889 renew_lease(server, calldata->timestamp);
88069f77
TM		 1890 nfs4_close_clear_stateid_flags(state,
1891 calldata->arg.fmode);
1da177e4
LT		 1892 break;
1893 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1894 case -NFS4ERR_OLD_STATEID:
1895 case -NFS4ERR_BAD_STATEID:
1da177e4 1896 case -NFS4ERR_EXPIRED:
dc0b027d 1897 if (calldata->arg.fmode == 0)
9e33bed5 1898 break;
1da177e4 1899 default:
72211dbe
TM		 1900 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1901 rpc_restart_call_prepare(task);
1da177e4 1902 }
72211dbe 1903 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1904 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1905}
1906
4ce70ada 1907static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1908{
4ce70ada 1909 struct nfs4_closedata *calldata = data;
9512135d 1910 struct nfs4_state *state = calldata->state;
88069f77 1911 int call_close = 0;
9512135d 1912
963d8fe5 1913 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1914 return;
003707c7 1915
88069f77
TM		 1916 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1917 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1918 spin_lock(&state->owner->so_lock);
003707c7 1919 /* Calculate the change in open mode */
e7616923 1920 if (state->n_rdwr == 0) {
003707c7 1921 if (state->n_rdonly == 0) {
88069f77
TM		 1922 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1923 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1924 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1925 }
1926 if (state->n_wronly == 0) {
88069f77
TM		 1927 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1928 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1929 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1930 }
e7616923 1931 }
4cecb76f 1932 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1933
1934 if (!call_close) {
963d8fe5
TM		 1935 /* Note: exit _without_ calling nfs4_close_done */
1936 task->tk_action = NULL;
9512135d
TM		 1937 return;
1938 }
88069f77 1939
f7e8917a 1940 if (calldata->arg.fmode == 0) {
88069f77 1941 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1942 if (calldata->roc &&
1943 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1944 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1945 task, NULL);
1946 return;
1947 }
1948 }
88069f77 1949
516a6af6 1950 nfs_fattr_init(calldata->res.fattr);
26e976a8 1951 calldata->timestamp = jiffies;
035168ab 1952 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1953 &calldata->arg.seq_args, &calldata->res.seq_res,
1954 1, task))
1955 return;
5138fde0 1956 rpc_call_start(task);
1da177e4
LT		 1957}
1958
963d8fe5 1959static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1960 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1961 .rpc_call_done = nfs4_close_done,
1962 .rpc_release = nfs4_free_closedata,
1963};
1964
1da177e4
LT		 1965/*
1966 * It is possible for data to be read/written from a mem-mapped file
1967 * after the sys_close call (which hits the vfs layer as a flush).
1968 * This means that we can't safely call nfsv4 close on a file until
1969 * the inode is cleared. This in turn means that we are not good
1970 * NFSv4 citizens - we do not indicate to the server to update the file's
1971 * share state even when we are done with one of the three share
1972 * stateid's in the inode.
1973 *
1974 * NOTE: Caller must be holding the sp->so_owner semaphore!
1975 */
f7e8917a 1976int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 1977{
4a35bd41 1978 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1979 struct nfs4_closedata *calldata;
b39e625b
TM		 1980 struct nfs4_state_owner *sp = state->owner;
1981 struct rpc_task *task;
5138fde0
TM		 1982 struct rpc_message msg = {
1983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1984 .rpc_cred = state->owner->so_cred,
1985 };
c970aa85
TM		 1986 struct rpc_task_setup task_setup_data = {
1987 .rpc_client = server->client,
5138fde0 1988 .rpc_message = &msg,
c970aa85 1989 .callback_ops = &nfs4_close_ops,
101070ca 1990 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1991 .flags = RPC_TASK_ASYNC,
1992 };
9512135d 1993 int status = -ENOMEM;
1da177e4 1994
8535b2be 1995 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 1996 if (calldata == NULL)
9512135d 1997 goto out;
4a35bd41 1998 calldata->inode = state->inode;
1da177e4 1999 calldata->state = state;
4a35bd41 2000 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2001 calldata->arg.stateid = &state->open_stateid;
1da177e4 2002 /* Serialization for the sequence id */
8535b2be 2003 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2004 if (calldata->arg.seqid == NULL)
2005 goto out_free_calldata;
dc0b027d 2006 calldata->arg.fmode = 0;
a65318bf 2007 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2008 calldata->res.fattr = &calldata->fattr;
c1d51931 2009 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2010 calldata->res.server = server;
f7e8917a 2011 calldata->roc = roc;
f6948697
AV		 2012 path_get(path);
2013 calldata->path = *path;
9512135d 2014
1174dd1f
TM		 2015 msg.rpc_argp = &calldata->arg;
2016 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2017 task_setup_data.callback_data = calldata;
2018 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2019 if (IS_ERR(task))
2020 return PTR_ERR(task);
a49c3c77
TM		 2021 status = 0;
2022 if (wait)
2023 status = rpc_wait_for_completion_task(task);
b39e625b 2024 rpc_put_task(task);
a49c3c77 2025 return status;
9512135d
TM		 2026out_free_calldata:
2027 kfree(calldata);
2028out:
f7e8917a
FI		 2029 if (roc)
2030 pnfs_roc_release(state->inode);
b39e625b
TM		 2031 nfs4_put_open_state(state);
2032 nfs4_put_state_owner(sp);
9512135d 2033 return status;
1da177e4
LT		 2034}
2035
2b484297 2036static struct inode *
cd9a1c0e 2037nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2038{
1da177e4 2039 struct nfs4_state *state;
1da177e4 2040
565277f6 2041 /* Protect against concurrent sillydeletes */
cd9a1c0e 2042 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2043 if (IS_ERR(state))
2044 return ERR_CAST(state);
cd9a1c0e 2045 ctx->state = state;
f46e0bd3 2046 return igrab(state->inode);
1da177e4
LT		 2047}
2048
1185a552 2049static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2050{
2051 if (ctx->state == NULL)
2052 return;
2053 if (is_sync)
2054 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2055 else
2056 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2057}
1da177e4
LT		 2058
2059static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2060{
43652ad5
BH		 2061 struct nfs4_server_caps_arg args = {
2062 .fhandle = fhandle,
2063 };
1da177e4
LT		 2064 struct nfs4_server_caps_res res = {};
2065 struct rpc_message msg = {
2066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2067 .rpc_argp = &args,
1da177e4
LT		 2068 .rpc_resp = &res,
2069 };
2070 int status;
2071
cccef3b9 2072 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2073 if (status == 0) {
2074 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2075 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2076 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2077 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2078 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2079 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2080 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2081 server->caps |= NFS_CAP_ACLS;
2082 if (res.has_links != 0)
2083 server->caps |= NFS_CAP_HARDLINKS;
2084 if (res.has_symlinks != 0)
2085 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2086 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2087 server->caps |= NFS_CAP_FILEID;
2088 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2089 server->caps |= NFS_CAP_MODE;
2090 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2091 server->caps |= NFS_CAP_NLINK;
2092 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2093 server->caps |= NFS_CAP_OWNER;
2094 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2095 server->caps |= NFS_CAP_OWNER_GROUP;
2096 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2097 server->caps |= NFS_CAP_ATIME;
2098 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2099 server->caps |= NFS_CAP_CTIME;
2100 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2101 server->caps |= NFS_CAP_MTIME;
2102
a65318bf
TM		 2103 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2104 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2105 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2106 server->acl_bitmask = res.acl_bitmask;
2107 }
cccef3b9 2108
1da177e4
LT		 2109 return status;
2110}
2111
55a97593 2112int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2113{
2114 struct nfs4_exception exception = { };
2115 int err;
2116 do {
2117 err = nfs4_handle_exception(server,
2118 _nfs4_server_capabilities(server, fhandle),
2119 &exception);
2120 } while (exception.retry);
2121 return err;
2122}
2123
2124static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2125 struct nfs_fsinfo *info)
2126{
1da177e4
LT		 2127 struct nfs4_lookup_root_arg args = {
2128 .bitmask = nfs4_fattr_bitmap,
2129 };
2130 struct nfs4_lookup_res res = {
2131 .server = server,
0e574af1 2132 .fattr = info->fattr,
1da177e4
LT		 2133 .fh = fhandle,
2134 };
2135 struct rpc_message msg = {
2136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2137 .rpc_argp = &args,
2138 .rpc_resp = &res,
2139 };
008f55d0 2140
0e574af1 2141 nfs_fattr_init(info->fattr);
fccba804 2142 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2143}
2144
2145static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2146 struct nfs_fsinfo *info)
2147{
2148 struct nfs4_exception exception = { };
2149 int err;
2150 do {
2151 err = nfs4_handle_exception(server,
2152 _nfs4_lookup_root(server, fhandle, info),
2153 &exception);
2154 } while (exception.retry);
2155 return err;
2156}
2157
54ceac45
DH		 2158/*
2159 * get the file handle for the "/" directory on the server
2160 */
1da177e4 2161static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2162 struct nfs_fsinfo *info)
1da177e4 2163{
1da177e4
LT		 2164 int status;
2165
1da177e4 2166 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2167 if (status == 0)
2168 status = nfs4_server_capabilities(server, fhandle);
2169 if (status == 0)
2170 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2171 return nfs4_map_errors(status);
1da177e4
LT		 2172}
2173
6b97fd3d
MN		 2174/*
2175 * Get locations and (maybe) other attributes of a referral.
2176 * Note that we'll actually follow the referral later when
2177 * we detect fsid mismatch in inode revalidation
2178 */
56659e99 2179static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2180{
2181 int status = -ENOMEM;
2182 struct page *page = NULL;
2183 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2184
2185 page = alloc_page(GFP_KERNEL);
2186 if (page == NULL)
2187 goto out;
2188 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2189 if (locations == NULL)
2190 goto out;
2191
c228fd3a 2192 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2193 if (status != 0)
2194 goto out;
2195 /* Make sure server returned a different fsid for the referral */
2196 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2197 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2198 status = -EIO;
2199 goto out;
2200 }
2201
2202 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2203 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2204 if (!fattr->mode)
2205 fattr->mode = S_IFDIR;
2206 memset(fhandle, 0, sizeof(struct nfs_fh));
2207out:
2208 if (page)
2209 __free_page(page);
5d7ca35a 2210 kfree(locations);
6b97fd3d
MN		 2211 return status;
2212}
2213
1da177e4
LT		 2214static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2215{
2216 struct nfs4_getattr_arg args = {
2217 .fh = fhandle,
2218 .bitmask = server->attr_bitmask,
2219 };
2220 struct nfs4_getattr_res res = {
2221 .fattr = fattr,
2222 .server = server,
2223 };
2224 struct rpc_message msg = {
2225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2226 .rpc_argp = &args,
2227 .rpc_resp = &res,
2228 };
2229
0e574af1 2230 nfs_fattr_init(fattr);
cccef3b9 2231 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2232}
2233
2234static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2235{
2236 struct nfs4_exception exception = { };
2237 int err;
2238 do {
2239 err = nfs4_handle_exception(server,
2240 _nfs4_proc_getattr(server, fhandle, fattr),
2241 &exception);
2242 } while (exception.retry);
2243 return err;
2244}
2245
2246/*
2247 * The file is not closed if it is opened due to the a request to change
2248 * the size of the file. The open call will not be needed once the
2249 * VFS layer lookup-intents are implemented.
2250 *
2251 * Close is called when the inode is destroyed.
2252 * If we haven't opened the file for O_WRONLY, we
2253 * need to in the size_change case to obtain a stateid.
2254 *
2255 * Got race?
2256 * Because OPEN is always done by name in nfsv4, it is
2257 * possible that we opened a different file by the same
2258 * name. We can recognize this race condition, but we
2259 * can't do anything about it besides returning an error.
2260 *
2261 * This will be fixed with VFS changes (lookup-intent).
2262 */
2263static int
2264nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2265 struct iattr *sattr)
2266{
08e9eac4 2267 struct inode *inode = dentry->d_inode;
659bfcd6 2268 struct rpc_cred *cred = NULL;
d530838b 2269 struct nfs4_state *state = NULL;
1da177e4
LT		 2270 int status;
2271
0e574af1 2272 nfs_fattr_init(fattr);
1da177e4 2273
d530838b 2274 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2275 if (sattr->ia_valid & ATTR_FILE) {
2276 struct nfs_open_context *ctx;
2277
2278 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2279 if (ctx) {
2280 cred = ctx->cred;
2281 state = ctx->state;
2282 }
659bfcd6 2283 }
08e9eac4 2284
659bfcd6 2285 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2286 if (status == 0)
2287 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2288 return status;
2289}
2290
56659e99
TM		 2291static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2292 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2293 struct nfs_fattr *fattr)
2294{
2295 int status;
2296 struct nfs4_lookup_arg args = {
2297 .bitmask = server->attr_bitmask,
2298 .dir_fh = dirfh,
2299 .name = name,
2300 };
2301 struct nfs4_lookup_res res = {
2302 .server = server,
2303 .fattr = fattr,
2304 .fh = fhandle,
2305 };
2306 struct rpc_message msg = {
2307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2308 .rpc_argp = &args,
2309 .rpc_resp = &res,
2310 };
2311
2312 nfs_fattr_init(fattr);
2313
2314 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2315 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2316 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2317 return status;
2318}
2319
2320static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2321 struct qstr *name, struct nfs_fh *fhandle,
2322 struct nfs_fattr *fattr)
2323{
2324 struct nfs4_exception exception = { };
2325 int err;
2326 do {
4e56e082
TM		 2327 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2328 /* FIXME: !!!! */
2329 if (err == -NFS4ERR_MOVED) {
2330 err = -EREMOTE;
2331 break;
2332 }
2333 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2334 } while (exception.retry);
2335 return err;
2336}
2337
56659e99 2338static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2339 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2340{
4e56e082 2341 int status;
1da177e4
LT		 2342
2343 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2344 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2345 if (status == -NFS4ERR_MOVED)
2346 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2347 dprintk("NFS reply lookup: %d\n", status);
2348 return status;
2349}
2350
2351static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2352{
2353 struct nfs4_exception exception = { };
2354 int err;
2355 do {
2356 err = nfs4_handle_exception(NFS_SERVER(dir),
2357 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2358 &exception);
2359 } while (exception.retry);
2360 return err;
2361}
2362
2363static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2364{
76b32999 2365 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2366 struct nfs4_accessargs args = {
2367 .fh = NFS_FH(inode),
76b32999
TM		 2368 .bitmask = server->attr_bitmask,
2369 };
2370 struct nfs4_accessres res = {
2371 .server = server,
1da177e4 2372 };
1da177e4
LT		 2373 struct rpc_message msg = {
2374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2375 .rpc_argp = &args,
2376 .rpc_resp = &res,
2377 .rpc_cred = entry->cred,
2378 };
2379 int mode = entry->mask;
2380 int status;
2381
2382 /*
2383 * Determine which access bits we want to ask for...
2384 */
2385 if (mode & MAY_READ)
2386 args.access |= NFS4_ACCESS_READ;
2387 if (S_ISDIR(inode->i_mode)) {
2388 if (mode & MAY_WRITE)
2389 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2390 if (mode & MAY_EXEC)
2391 args.access |= NFS4_ACCESS_LOOKUP;
2392 } else {
2393 if (mode & MAY_WRITE)
2394 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2395 if (mode & MAY_EXEC)
2396 args.access |= NFS4_ACCESS_EXECUTE;
2397 }
c407d41a
TM		 2398
2399 res.fattr = nfs_alloc_fattr();
2400 if (res.fattr == NULL)
2401 return -ENOMEM;
2402
cccef3b9 2403 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2404 if (!status) {
2405 entry->mask = 0;
2406 if (res.access & NFS4_ACCESS_READ)
2407 entry->mask |= MAY_READ;
2408 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2409 entry->mask |= MAY_WRITE;
2410 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2411 entry->mask |= MAY_EXEC;
c407d41a 2412 nfs_refresh_inode(inode, res.fattr);
1da177e4 2413 }
c407d41a 2414 nfs_free_fattr(res.fattr);
1da177e4
LT		 2415 return status;
2416}
2417
2418static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2419{
2420 struct nfs4_exception exception = { };
2421 int err;
2422 do {
2423 err = nfs4_handle_exception(NFS_SERVER(inode),
2424 _nfs4_proc_access(inode, entry),
2425 &exception);
2426 } while (exception.retry);
2427 return err;
2428}
2429
2430/*
2431 * TODO: For the time being, we don't try to get any attributes
2432 * along with any of the zero-copy operations READ, READDIR,
2433 * READLINK, WRITE.
2434 *
2435 * In the case of the first three, we want to put the GETATTR
2436 * after the read-type operation -- this is because it is hard
2437 * to predict the length of a GETATTR response in v4, and thus
2438 * align the READ data correctly. This means that the GETATTR
2439 * may end up partially falling into the page cache, and we should
2440 * shift it into the 'tail' of the xdr_buf before processing.
2441 * To do this efficiently, we need to know the total length
2442 * of data received, which doesn't seem to be available outside
2443 * of the RPC layer.
2444 *
2445 * In the case of WRITE, we also want to put the GETATTR after
2446 * the operation -- in this case because we want to make sure
2447 * we get the post-operation mtime and size. This means that
2448 * we can't use xdr_encode_pages() as written: we need a variant
2449 * of it which would leave room in the 'tail' iovec.
2450 *
2451 * Both of these changes to the XDR layer would in fact be quite
2452 * minor, but I decided to leave them for a subsequent patch.
2453 */
2454static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2455 unsigned int pgbase, unsigned int pglen)
2456{
2457 struct nfs4_readlink args = {
2458 .fh = NFS_FH(inode),
2459 .pgbase = pgbase,
2460 .pglen = pglen,
2461 .pages = &page,
2462 };
f50c7000 2463 struct nfs4_readlink_res res;
1da177e4
LT		 2464 struct rpc_message msg = {
2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2466 .rpc_argp = &args,
f50c7000 2467 .rpc_resp = &res,
1da177e4
LT		 2468 };
2469
cccef3b9 2470 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2471}
2472
2473static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2474 unsigned int pgbase, unsigned int pglen)
2475{
2476 struct nfs4_exception exception = { };
2477 int err;
2478 do {
2479 err = nfs4_handle_exception(NFS_SERVER(inode),
2480 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2481 &exception);
2482 } while (exception.retry);
2483 return err;
2484}
2485
1da177e4
LT		 2486/*
2487 * Got race?
2488 * We will need to arrange for the VFS layer to provide an atomic open.
2489 * Until then, this create/open method is prone to inefficiency and race
2490 * conditions due to the lookup, create, and open VFS calls from sys_open()
2491 * placed on the wire.
2492 *
2493 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2494 * The file will be opened again in the subsequent VFS open call
2495 * (nfs4_proc_file_open).
2496 *
2497 * The open for read will just hang around to be used by any process that
2498 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2499 */
2500
2501static int
2502nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2503 int flags, struct nfs_open_context *ctx)
1da177e4 2504{
c0204fd2 2505 struct path my_path = {
ad389da7
TM		 2506 .dentry = dentry,
2507 };
c0204fd2 2508 struct path *path = &my_path;
1da177e4 2509 struct nfs4_state *state;
c0204fd2
TM		 2510 struct rpc_cred *cred = NULL;
2511 fmode_t fmode = 0;
1da177e4
LT		 2512 int status = 0;
2513
c0204fd2
TM		 2514 if (ctx != NULL) {
2515 cred = ctx->cred;
2516 path = &ctx->path;
2517 fmode = ctx->mode;
1da177e4 2518 }
a8a5da99 2519 sattr->ia_mode &= ~current_umask();
c0204fd2 2520 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2521 d_drop(dentry);
1da177e4
LT		 2522 if (IS_ERR(state)) {
2523 status = PTR_ERR(state);
c0204fd2 2524 goto out;
1da177e4 2525 }
d4d9cdcb 2526 d_add(dentry, igrab(state->inode));
d75340cc 2527 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2528 if (ctx != NULL)
2529 ctx->state = state;
02a913a7 2530 else
c0204fd2 2531 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2532out:
2533 return status;
2534}
2535
2536static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2537{
16e42959 2538 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2539 struct nfs_removeargs args = {
1da177e4 2540 .fh = NFS_FH(dir),
4fdc17b2
TM		 2541 .name.len = name->len,
2542 .name.name = name->name,
16e42959
TM		 2543 .bitmask = server->attr_bitmask,
2544 };
4fdc17b2 2545 struct nfs_removeres res = {
16e42959 2546 .server = server,
1da177e4 2547 };
1da177e4 2548 struct rpc_message msg = {
4fdc17b2
TM		 2549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2550 .rpc_argp = &args,
2551 .rpc_resp = &res,
1da177e4 2552 };
d346890b
TM		 2553 int status = -ENOMEM;
2554
2555 res.dir_attr = nfs_alloc_fattr();
2556 if (res.dir_attr == NULL)
2557 goto out;
1da177e4 2558
cccef3b9 2559 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2560 if (status == 0) {
2561 update_changeattr(dir, &res.cinfo);
d346890b 2562 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2563 }
d346890b
TM		 2564 nfs_free_fattr(res.dir_attr);
2565out:
1da177e4
LT		 2566 return status;
2567}
2568
2569static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2570{
2571 struct nfs4_exception exception = { };
2572 int err;
2573 do {
2574 err = nfs4_handle_exception(NFS_SERVER(dir),
2575 _nfs4_proc_remove(dir, name),
2576 &exception);
2577 } while (exception.retry);
2578 return err;
2579}
2580
e4eff1a6 2581static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2582{
e4eff1a6
TM		 2583 struct nfs_server *server = NFS_SERVER(dir);
2584 struct nfs_removeargs *args = msg->rpc_argp;
2585 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2586
a65318bf 2587 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2588 res->server = server;
dfb4f309 2589 res->seq_res.sr_slot = NULL;
1da177e4 2590 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2591}
2592
e4eff1a6 2593static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2594{
e4eff1a6
TM		 2595 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2596
14516c3a
TM		 2597 if (!nfs4_sequence_done(task, &res->seq_res))
2598 return 0;
9e33bed5 2599 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2600 return 0;
2601 update_changeattr(dir, &res->cinfo);
d346890b 2602 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2603 return 1;
1da177e4
LT		 2604}
2605
d3d4152a
JL		 2606static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2607{
2608 struct nfs_server *server = NFS_SERVER(dir);
2609 struct nfs_renameargs *arg = msg->rpc_argp;
2610 struct nfs_renameres *res = msg->rpc_resp;
2611
2612 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2613 arg->bitmask = server->attr_bitmask;
2614 res->server = server;
2615}
2616
2617static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2618 struct inode *new_dir)
2619{
2620 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2621
2622 if (!nfs4_sequence_done(task, &res->seq_res))
2623 return 0;
2624 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2625 return 0;
2626
2627 update_changeattr(old_dir, &res->old_cinfo);
2628 nfs_post_op_update_inode(old_dir, res->old_fattr);
2629 update_changeattr(new_dir, &res->new_cinfo);
2630 nfs_post_op_update_inode(new_dir, res->new_fattr);
2631 return 1;
2632}
2633
1da177e4
LT		 2634static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2635 struct inode *new_dir, struct qstr *new_name)
2636{
6caf2c82 2637 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2638 struct nfs_renameargs arg = {
1da177e4
LT		 2639 .old_dir = NFS_FH(old_dir),
2640 .new_dir = NFS_FH(new_dir),
2641 .old_name = old_name,
2642 .new_name = new_name,
6caf2c82
TM		 2643 .bitmask = server->attr_bitmask,
2644 };
e8582a8b 2645 struct nfs_renameres res = {
6caf2c82 2646 .server = server,
1da177e4 2647 };
1da177e4
LT		 2648 struct rpc_message msg = {
2649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2650 .rpc_argp = &arg,
2651 .rpc_resp = &res,
2652 };
011fff72 2653 int status = -ENOMEM;
1da177e4 2654
011fff72
TM		 2655 res.old_fattr = nfs_alloc_fattr();
2656 res.new_fattr = nfs_alloc_fattr();
2657 if (res.old_fattr == NULL || res.new_fattr == NULL)
2658 goto out;
1da177e4 2659
011fff72 2660 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2661 if (!status) {
2662 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2663 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2664 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2665 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2666 }
011fff72
TM		 2667out:
2668 nfs_free_fattr(res.new_fattr);
2669 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2670 return status;
2671}
2672
2673static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2674 struct inode *new_dir, struct qstr *new_name)
2675{
2676 struct nfs4_exception exception = { };
2677 int err;
2678 do {
2679 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2680 _nfs4_proc_rename(old_dir, old_name,
2681 new_dir, new_name),
2682 &exception);
2683 } while (exception.retry);
2684 return err;
2685}
2686
2687static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2688{
91ba2eee 2689 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2690 struct nfs4_link_arg arg = {
2691 .fh = NFS_FH(inode),
2692 .dir_fh = NFS_FH(dir),
2693 .name = name,
91ba2eee
TM		 2694 .bitmask = server->attr_bitmask,
2695 };
91ba2eee
TM		 2696 struct nfs4_link_res res = {
2697 .server = server,
1da177e4 2698 };
1da177e4
LT		 2699 struct rpc_message msg = {
2700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2701 .rpc_argp = &arg,
91ba2eee 2702 .rpc_resp = &res,
1da177e4 2703 };
136f2627
TM		 2704 int status = -ENOMEM;
2705
2706 res.fattr = nfs_alloc_fattr();
2707 res.dir_attr = nfs_alloc_fattr();
2708 if (res.fattr == NULL || res.dir_attr == NULL)
2709 goto out;
1da177e4 2710
cccef3b9 2711 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2712 if (!status) {
2713 update_changeattr(dir, &res.cinfo);
2714 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2715 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2716 }
136f2627
TM		 2717out:
2718 nfs_free_fattr(res.dir_attr);
2719 nfs_free_fattr(res.fattr);
1da177e4
LT		 2720 return status;
2721}
2722
2723static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2724{
2725 struct nfs4_exception exception = { };
2726 int err;
2727 do {
2728 err = nfs4_handle_exception(NFS_SERVER(inode),
2729 _nfs4_proc_link(inode, dir, name),
2730 &exception);
2731 } while (exception.retry);
2732 return err;
2733}
2734
57dc9a57
TM		 2735struct nfs4_createdata {
2736 struct rpc_message msg;
2737 struct nfs4_create_arg arg;
2738 struct nfs4_create_res res;
2739 struct nfs_fh fh;
2740 struct nfs_fattr fattr;
2741 struct nfs_fattr dir_fattr;
2742};
2743
2744static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2745 struct qstr *name, struct iattr *sattr, u32 ftype)
2746{
2747 struct nfs4_createdata *data;
2748
2749 data = kzalloc(sizeof(*data), GFP_KERNEL);
2750 if (data != NULL) {
2751 struct nfs_server *server = NFS_SERVER(dir);
2752
2753 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2754 data->msg.rpc_argp = &data->arg;
2755 data->msg.rpc_resp = &data->res;
2756 data->arg.dir_fh = NFS_FH(dir);
2757 data->arg.server = server;
2758 data->arg.name = name;
2759 data->arg.attrs = sattr;
2760 data->arg.ftype = ftype;
2761 data->arg.bitmask = server->attr_bitmask;
2762 data->res.server = server;
2763 data->res.fh = &data->fh;
2764 data->res.fattr = &data->fattr;
2765 data->res.dir_fattr = &data->dir_fattr;
2766 nfs_fattr_init(data->res.fattr);
2767 nfs_fattr_init(data->res.dir_fattr);
2768 }
2769 return data;
2770}
2771
2772static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2773{
cccef3b9
AA		 2774 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2775 &data->arg, &data->res, 1);
57dc9a57
TM		 2776 if (status == 0) {
2777 update_changeattr(dir, &data->res.dir_cinfo);
2778 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2779 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2780 }
2781 return status;
2782}
2783
2784static void nfs4_free_createdata(struct nfs4_createdata *data)
2785{
2786 kfree(data);
2787}
2788
4f390c15 2789static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2790 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2791{
57dc9a57
TM		 2792 struct nfs4_createdata *data;
2793 int status = -ENAMETOOLONG;
1da177e4 2794
94a6d753 2795 if (len > NFS4_MAXPATHLEN)
57dc9a57 2796 goto out;
4f390c15 2797
57dc9a57
TM		 2798 status = -ENOMEM;
2799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2800 if (data == NULL)
2801 goto out;
2802
2803 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2804 data->arg.u.symlink.pages = &page;
2805 data->arg.u.symlink.len = len;
1da177e4 2806
57dc9a57
TM		 2807 status = nfs4_do_create(dir, dentry, data);
2808
2809 nfs4_free_createdata(data);
2810out:
1da177e4
LT		 2811 return status;
2812}
2813
4f390c15 2814static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2815 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
2820 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2821 _nfs4_proc_symlink(dir, dentry, page,
2822 len, sattr),
1da177e4
LT		 2823 &exception);
2824 } while (exception.retry);
2825 return err;
2826}
2827
2828static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2829 struct iattr *sattr)
2830{
57dc9a57
TM		 2831 struct nfs4_createdata *data;
2832 int status = -ENOMEM;
1da177e4 2833
57dc9a57
TM		 2834 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2835 if (data == NULL)
2836 goto out;
2837
2838 status = nfs4_do_create(dir, dentry, data);
2839
2840 nfs4_free_createdata(data);
2841out:
1da177e4
LT		 2842 return status;
2843}
2844
2845static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2846 struct iattr *sattr)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
a8a5da99
AK		 2850
2851 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2852 do {
2853 err = nfs4_handle_exception(NFS_SERVER(dir),
2854 _nfs4_proc_mkdir(dir, dentry, sattr),
2855 &exception);
2856 } while (exception.retry);
2857 return err;
2858}
2859
2860static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2861 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2862{
2863 struct inode *dir = dentry->d_inode;
2864 struct nfs4_readdir_arg args = {
2865 .fh = NFS_FH(dir),
56e4ebf8 2866 .pages = pages,
1da177e4
LT		 2867 .pgbase = 0,
2868 .count = count,
96d25e53 2869 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2870 .plus = plus,
1da177e4
LT		 2871 };
2872 struct nfs4_readdir_res res;
2873 struct rpc_message msg = {
2874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2875 .rpc_argp = &args,
2876 .rpc_resp = &res,
2877 .rpc_cred = cred,
2878 };
2879 int status;
2880
3110ff80 2881 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2882 dentry->d_parent->d_name.name,
2883 dentry->d_name.name,
2884 (unsigned long long)cookie);
1da177e4
LT		 2885 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2886 res.pgbase = args.pgbase;
cccef3b9 2887 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
ac396128 2888 if (status >= 0) {
1da177e4 2889 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2890 status += args.pgbase;
2891 }
c4812998
TM		 2892
2893 nfs_invalidate_atime(dir);
2894
3110ff80 2895 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2896 return status;
2897}
2898
2899static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2900 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2901{
2902 struct nfs4_exception exception = { };
2903 int err;
2904 do {
2905 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2906 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2907 pages, count, plus),
1da177e4
LT		 2908 &exception);
2909 } while (exception.retry);
2910 return err;
2911}
2912
2913static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2914 struct iattr *sattr, dev_t rdev)
2915{
57dc9a57
TM		 2916 struct nfs4_createdata *data;
2917 int mode = sattr->ia_mode;
2918 int status = -ENOMEM;
1da177e4
LT		 2919
2920 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2921 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2922
2923 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2924 if (data == NULL)
2925 goto out;
2926
1da177e4 2927 if (S_ISFIFO(mode))
57dc9a57 2928 data->arg.ftype = NF4FIFO;
1da177e4 2929 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2930 data->arg.ftype = NF4BLK;
2931 data->arg.u.device.specdata1 = MAJOR(rdev);
2932 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2933 }
2934 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2935 data->arg.ftype = NF4CHR;
2936 data->arg.u.device.specdata1 = MAJOR(rdev);
2937 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2938 }
1da177e4 2939
57dc9a57
TM		 2940 status = nfs4_do_create(dir, dentry, data);
2941
2942 nfs4_free_createdata(data);
2943out:
1da177e4
LT		 2944 return status;
2945}
2946
2947static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2948 struct iattr *sattr, dev_t rdev)
2949{
2950 struct nfs4_exception exception = { };
2951 int err;
a8a5da99
AK		 2952
2953 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2954 do {
2955 err = nfs4_handle_exception(NFS_SERVER(dir),
2956 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2957 &exception);
2958 } while (exception.retry);
2959 return err;
2960}
2961
2962static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2963 struct nfs_fsstat *fsstat)
2964{
2965 struct nfs4_statfs_arg args = {
2966 .fh = fhandle,
2967 .bitmask = server->attr_bitmask,
2968 };
24ad148a
BH		 2969 struct nfs4_statfs_res res = {
2970 .fsstat = fsstat,
2971 };
1da177e4
LT		 2972 struct rpc_message msg = {
2973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2974 .rpc_argp = &args,
24ad148a 2975 .rpc_resp = &res,
1da177e4
LT		 2976 };
2977
0e574af1 2978 nfs_fattr_init(fsstat->fattr);
cccef3b9 2979 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2980}
2981
2982static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2983{
2984 struct nfs4_exception exception = { };
2985 int err;
2986 do {
2987 err = nfs4_handle_exception(server,
2988 _nfs4_proc_statfs(server, fhandle, fsstat),
2989 &exception);
2990 } while (exception.retry);
2991 return err;
2992}
2993
2994static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2995 struct nfs_fsinfo *fsinfo)
2996{
2997 struct nfs4_fsinfo_arg args = {
2998 .fh = fhandle,
2999 .bitmask = server->attr_bitmask,
3000 };
3dda5e43
BH		 3001 struct nfs4_fsinfo_res res = {
3002 .fsinfo = fsinfo,
3003 };
1da177e4
LT		 3004 struct rpc_message msg = {
3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3006 .rpc_argp = &args,
3dda5e43 3007 .rpc_resp = &res,
1da177e4
LT		 3008 };
3009
cccef3b9 3010 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3011}
3012
3013static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3014{
3015 struct nfs4_exception exception = { };
3016 int err;
3017
3018 do {
3019 err = nfs4_handle_exception(server,
3020 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3021 &exception);
3022 } while (exception.retry);
3023 return err;
3024}
3025
3026static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3027{
0e574af1 3028 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3029 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3030}
3031
3032static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3033 struct nfs_pathconf *pathconf)
3034{
3035 struct nfs4_pathconf_arg args = {
3036 .fh = fhandle,
3037 .bitmask = server->attr_bitmask,
3038 };
d45b2989
BH		 3039 struct nfs4_pathconf_res res = {
3040 .pathconf = pathconf,
3041 };
1da177e4
LT		 3042 struct rpc_message msg = {
3043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3044 .rpc_argp = &args,
d45b2989 3045 .rpc_resp = &res,
1da177e4
LT		 3046 };
3047
3048 /* None of the pathconf attributes are mandatory to implement */
3049 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3050 memset(pathconf, 0, sizeof(*pathconf));
3051 return 0;
3052 }
3053
0e574af1 3054 nfs_fattr_init(pathconf->fattr);
cccef3b9 3055 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 3056}
3057
3058static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3059 struct nfs_pathconf *pathconf)
3060{
3061 struct nfs4_exception exception = { };
3062 int err;
3063
3064 do {
3065 err = nfs4_handle_exception(server,
3066 _nfs4_proc_pathconf(server, fhandle, pathconf),
3067 &exception);
3068 } while (exception.retry);
3069 return err;
3070}
3071
ec06c096 3072static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3073{
ec06c096 3074 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3075
f11c88af
AA		 3076 dprintk("--> %s\n", __func__);
3077
14516c3a
TM		 3078 if (!nfs4_sequence_done(task, &data->res.seq_res))
3079 return -EAGAIN;
f11c88af 3080
9e33bed5 3081 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3082 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3083 return -EAGAIN;
1da177e4 3084 }
8850df99
TM		 3085
3086 nfs_invalidate_atime(data->inode);
1da177e4 3087 if (task->tk_status > 0)
ec06c096
TM		 3088 renew_lease(server, data->timestamp);
3089 return 0;
1da177e4
LT		 3090}
3091
bdc7f021 3092static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3093{
1da177e4 3094 data->timestamp = jiffies;
bdc7f021 3095 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3096}
3097
788e7a89 3098static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3099{
1da177e4
LT		 3100 struct inode *inode = data->inode;
3101
14516c3a
TM		 3102 if (!nfs4_sequence_done(task, &data->res.seq_res))
3103 return -EAGAIN;
def6ed7e 3104
9e33bed5 3105 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3106 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3107 return -EAGAIN;
1da177e4 3108 }
4f9838c7 3109 if (task->tk_status >= 0) {
1da177e4 3110 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3111 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3112 }
788e7a89 3113 return 0;
1da177e4
LT		 3114}
3115
bdc7f021 3116static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3117{
bdc7f021
TM		 3118 struct nfs_server *server = NFS_SERVER(data->inode);
3119
a65318bf 3120 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3121 data->res.server = server;
1da177e4
LT		 3122 data->timestamp = jiffies;
3123
bdc7f021 3124 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3125}
3126
788e7a89 3127static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3128{
1da177e4
LT		 3129 struct inode *inode = data->inode;
3130
14516c3a
TM		 3131 if (!nfs4_sequence_done(task, &data->res.seq_res))
3132 return -EAGAIN;
3133
9e33bed5 3134 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3135 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3136 return -EAGAIN;
1da177e4 3137 }
9e08a3c5 3138 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3139 return 0;
1da177e4
LT		 3140}
3141
bdc7f021 3142static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3143{
788e7a89 3144 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3145
a65318bf 3146 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3147 data->res.server = server;
bdc7f021 3148 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3149}
3150
9bc4e3ca
CL		 3151struct nfs4_renewdata {
3152 struct nfs_client *client;
3153 unsigned long timestamp;
3154};
3155
1da177e4
LT		 3156/*
3157 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3158 * standalone procedure for queueing an asynchronous RENEW.
3159 */
9bc4e3ca 3160static void nfs4_renew_release(void *calldata)
dc96aef9 3161{
9bc4e3ca
CL		 3162 struct nfs4_renewdata *data = calldata;
3163 struct nfs_client *clp = data->client;
dc96aef9 3164
0851de06
AB		 3165 if (atomic_read(&clp->cl_count) > 1)
3166 nfs4_schedule_state_renewal(clp);
3167 nfs_put_client(clp);
9bc4e3ca 3168 kfree(data);
dc96aef9
AB		 3169}
3170
9bc4e3ca 3171static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3172{
9bc4e3ca
CL		 3173 struct nfs4_renewdata *data = calldata;
3174 struct nfs_client *clp = data->client;
3175 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3176
3177 if (task->tk_status < 0) {
95baa25c
TM		 3178 /* Unless we're shutting down, schedule state recovery! */
3179 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3180 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3181 return;
3182 }
452e9352 3183 do_renew_lease(clp, timestamp);
1da177e4
LT		 3184}
3185
963d8fe5
TM		 3186static const struct rpc_call_ops nfs4_renew_ops = {
3187 .rpc_call_done = nfs4_renew_done,
dc96aef9 3188 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3189};
3190
adfa6f98 3191int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3192{
3193 struct rpc_message msg = {
3194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3195 .rpc_argp = clp,
b4454fe1 3196 .rpc_cred = cred,
1da177e4 3197 };
9bc4e3ca 3198 struct nfs4_renewdata *data;
1da177e4 3199
0851de06
AB		 3200 if (!atomic_inc_not_zero(&clp->cl_count))
3201 return -EIO;
9bc4e3ca
CL		 3202 data = kmalloc(sizeof(*data), GFP_KERNEL);
3203 if (data == NULL)
3204 return -ENOMEM;
3205 data->client = clp;
3206 data->timestamp = jiffies;
1da177e4 3207 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3208 &nfs4_renew_ops, data);
1da177e4
LT		 3209}
3210
adfa6f98 3211int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3212{
3213 struct rpc_message msg = {
3214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3215 .rpc_argp = clp,
b4454fe1 3216 .rpc_cred = cred,
1da177e4
LT		 3217 };
3218 unsigned long now = jiffies;
3219 int status;
3220
3221 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3222 if (status < 0)
3223 return status;
452e9352 3224 do_renew_lease(clp, now);
1da177e4
LT		 3225 return 0;
3226}
3227
aa1870af
BF		 3228static inline int nfs4_server_supports_acls(struct nfs_server *server)
3229{
3230 return (server->caps & NFS_CAP_ACLS)
3231 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3232 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3233}
3234
3235/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3236 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3237 * the stack.
3238 */
3239#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3240
3241static void buf_to_pages(const void *buf, size_t buflen,
3242 struct page **pages, unsigned int *pgbase)
3243{
3244 const void *p = buf;
3245
3246 *pgbase = offset_in_page(buf);
3247 p -= *pgbase;
3248 while (p < buf + buflen) {
3249 *(pages++) = virt_to_page(p);
3250 p += PAGE_CACHE_SIZE;
3251 }
3252}
3253
e9e3d724
NH		 3254static int buf_to_pages_noslab(const void *buf, size_t buflen,
3255 struct page **pages, unsigned int *pgbase)
3256{
3257 struct page *newpage, **spages;
3258 int rc = 0;
3259 size_t len;
3260 spages = pages;
3261
3262 do {
43b7c3f0 3263 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3264 newpage = alloc_page(GFP_KERNEL);
3265
3266 if (newpage == NULL)
3267 goto unwind;
3268 memcpy(page_address(newpage), buf, len);
3269 buf += len;
3270 buflen -= len;
3271 *pages++ = newpage;
3272 rc++;
3273 } while (buflen != 0);
3274
3275 return rc;
3276
3277unwind:
3278 for(; rc > 0; rc--)
3279 __free_page(spages[rc-1]);
3280 return -ENOMEM;
3281}
3282
e50a1c2e
BF		 3283struct nfs4_cached_acl {
3284 int cached;
3285 size_t len;
3e9d4154 3286 char data[0];
e50a1c2e
BF		 3287};
3288
3289static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3290{
3291 struct nfs_inode *nfsi = NFS_I(inode);
3292
3293 spin_lock(&inode->i_lock);
3294 kfree(nfsi->nfs4_acl);
3295 nfsi->nfs4_acl = acl;
3296 spin_unlock(&inode->i_lock);
3297}
3298
3299static void nfs4_zap_acl_attr(struct inode *inode)
3300{
3301 nfs4_set_cached_acl(inode, NULL);
3302}
3303
3304static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3305{
3306 struct nfs_inode *nfsi = NFS_I(inode);
3307 struct nfs4_cached_acl *acl;
3308 int ret = -ENOENT;
3309
3310 spin_lock(&inode->i_lock);
3311 acl = nfsi->nfs4_acl;
3312 if (acl == NULL)
3313 goto out;
3314 if (buf == NULL) /* user is just asking for length */
3315 goto out_len;
3316 if (acl->cached == 0)
3317 goto out;
3318 ret = -ERANGE; /* see getxattr(2) man page */
3319 if (acl->len > buflen)
3320 goto out;
3321 memcpy(buf, acl->data, acl->len);
3322out_len:
3323 ret = acl->len;
3324out:
3325 spin_unlock(&inode->i_lock);
3326 return ret;
3327}
3328
3329static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3330{
3331 struct nfs4_cached_acl *acl;
3332
3333 if (buf && acl_len <= PAGE_SIZE) {
3334 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3335 if (acl == NULL)
3336 goto out;
3337 acl->cached = 1;
3338 memcpy(acl->data, buf, acl_len);
3339 } else {
3340 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3341 if (acl == NULL)
3342 goto out;
3343 acl->cached = 0;
3344 }
3345 acl->len = acl_len;
3346out:
3347 nfs4_set_cached_acl(inode, acl);
3348}
3349
16b4289c 3350static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3351{
aa1870af
BF		 3352 struct page *pages[NFS4ACL_MAXPAGES];
3353 struct nfs_getaclargs args = {
3354 .fh = NFS_FH(inode),
3355 .acl_pages = pages,
3356 .acl_len = buflen,
3357 };
663c79b3
BH		 3358 struct nfs_getaclres res = {
3359 .acl_len = buflen,
3360 };
e50a1c2e 3361 void *resp_buf;
aa1870af
BF		 3362 struct rpc_message msg = {
3363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3364 .rpc_argp = &args,
663c79b3 3365 .rpc_resp = &res,
aa1870af 3366 };
e50a1c2e 3367 struct page *localpage = NULL;
aa1870af
BF		 3368 int ret;
3369
e50a1c2e
BF		 3370 if (buflen < PAGE_SIZE) {
3371 /* As long as we're doing a round trip to the server anyway,
3372 * let's be prepared for a page of acl data. */
3373 localpage = alloc_page(GFP_KERNEL);
3374 resp_buf = page_address(localpage);
3375 if (localpage == NULL)
3376 return -ENOMEM;
3377 args.acl_pages[0] = localpage;
3378 args.acl_pgbase = 0;
663c79b3 3379 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3380 } else {
3381 resp_buf = buf;
3382 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3383 }
cccef3b9 3384 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3385 if (ret)
3386 goto out_free;
663c79b3
BH		 3387 if (res.acl_len > args.acl_len)
3388 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3389 else
663c79b3 3390 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3391 if (buf) {
3392 ret = -ERANGE;
663c79b3 3393 if (res.acl_len > buflen)
e50a1c2e
BF		 3394 goto out_free;
3395 if (localpage)
663c79b3 3396 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3397 }
663c79b3 3398 ret = res.acl_len;
e50a1c2e
BF		 3399out_free:
3400 if (localpage)
3401 __free_page(localpage);
aa1870af
BF		 3402 return ret;
3403}
3404
16b4289c
TM		 3405static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3406{
3407 struct nfs4_exception exception = { };
3408 ssize_t ret;
3409 do {
3410 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3411 if (ret >= 0)
3412 break;
3413 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3414 } while (exception.retry);
3415 return ret;
3416}
3417
e50a1c2e
BF		 3418static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3419{
3420 struct nfs_server *server = NFS_SERVER(inode);
3421 int ret;
3422
3423 if (!nfs4_server_supports_acls(server))
3424 return -EOPNOTSUPP;
3425 ret = nfs_revalidate_inode(server, inode);
3426 if (ret < 0)
3427 return ret;
08a22b39
AK		 3428 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3429 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3430 ret = nfs4_read_cached_acl(inode, buf, buflen);
3431 if (ret != -ENOENT)
3432 return ret;
3433 return nfs4_get_acl_uncached(inode, buf, buflen);
3434}
3435
16b4289c 3436static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3437{
3438 struct nfs_server *server = NFS_SERVER(inode);
3439 struct page *pages[NFS4ACL_MAXPAGES];
3440 struct nfs_setaclargs arg = {
3441 .fh = NFS_FH(inode),
3442 .acl_pages = pages,
3443 .acl_len = buflen,
3444 };
73c403a9 3445 struct nfs_setaclres res;
4b580ee3
BF		 3446 struct rpc_message msg = {
3447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3448 .rpc_argp = &arg,
73c403a9 3449 .rpc_resp = &res,
4b580ee3 3450 };
e9e3d724 3451 int ret, i;
4b580ee3
BF		 3452
3453 if (!nfs4_server_supports_acls(server))
3454 return -EOPNOTSUPP;
e9e3d724
NH		 3455 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3456 if (i < 0)
3457 return i;
642ac549 3458 nfs_inode_return_delegation(inode);
cccef3b9 3459 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
e9e3d724
NH		 3460
3461 /*
3462 * Free each page after tx, so the only ref left is
3463 * held by the network stack
3464 */
3465 for (; i > 0; i--)
3466 put_page(pages[i-1]);
3467
08a22b39
AK		 3468 /*
3469 * Acl update can result in inode attribute update.
3470 * so mark the attribute cache invalid.
3471 */
3472 spin_lock(&inode->i_lock);
3473 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3474 spin_unlock(&inode->i_lock);
f41f7418
TM		 3475 nfs_access_zap_cache(inode);
3476 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3477 return ret;
3478}
3479
16b4289c
TM		 3480static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3481{
3482 struct nfs4_exception exception = { };
3483 int err;
3484 do {
3485 err = nfs4_handle_exception(NFS_SERVER(inode),
3486 __nfs4_proc_set_acl(inode, buf, buflen),
3487 &exception);
3488 } while (exception.retry);
3489 return err;
3490}
3491
1da177e4 3492static int
aa5190d0 3493nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3494{
aa5190d0
TM		 3495 struct nfs_client *clp = server->nfs_client;
3496
3497 if (task->tk_status >= 0)
1da177e4
LT		 3498 return 0;
3499 switch(task->tk_status) {
9e33bed5
TM		 3500 case -NFS4ERR_ADMIN_REVOKED:
3501 case -NFS4ERR_BAD_STATEID:
3502 case -NFS4ERR_OPENMODE:
3503 if (state == NULL)
3504 break;
0400a6b0
TM		 3505 nfs4_schedule_stateid_recovery(server, state);
3506 goto wait_on_recovery;
1da177e4 3507 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3508 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3509 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3510 nfs4_schedule_lease_recovery(clp);
3511 goto wait_on_recovery;
4745e315
AA		 3512#if defined(CONFIG_NFS_V4_1)
3513 case -NFS4ERR_BADSESSION:
3514 case -NFS4ERR_BADSLOT:
3515 case -NFS4ERR_BAD_HIGH_SLOT:
3516 case -NFS4ERR_DEADSESSION:
3517 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3518 case -NFS4ERR_SEQ_FALSE_RETRY:
3519 case -NFS4ERR_SEQ_MISORDERED:
3520 dprintk("%s ERROR %d, Reset session\n", __func__,
3521 task->tk_status);
0400a6b0 3522 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3523 task->tk_status = 0;
3524 return -EAGAIN;
3525#endif /* CONFIG_NFS_V4_1 */
1da177e4 3526 case -NFS4ERR_DELAY:
aa5190d0 3527 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3528 case -NFS4ERR_GRACE:
2c643488 3529 case -EKEYEXPIRED:
1da177e4
LT		 3530 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3531 task->tk_status = 0;
3532 return -EAGAIN;
3533 case -NFS4ERR_OLD_STATEID:
3534 task->tk_status = 0;
3535 return -EAGAIN;
3536 }
3537 task->tk_status = nfs4_map_errors(task->tk_status);
3538 return 0;
0400a6b0 3539wait_on_recovery:
a2c0b9e2 3540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3543 task->tk_status = 0;
3544 return -EAGAIN;
1da177e4
LT		 3545}
3546
bb8b27e5
TM		 3547int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3548 unsigned short port, struct rpc_cred *cred,
3549 struct nfs4_setclientid_res *res)
1da177e4
LT		 3550{
3551 nfs4_verifier sc_verifier;
3552 struct nfs4_setclientid setclientid = {
3553 .sc_verifier = &sc_verifier,
3554 .sc_prog = program,
f4eecd5d 3555 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3556 };
3557 struct rpc_message msg = {
3558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3559 .rpc_argp = &setclientid,
bb8b27e5 3560 .rpc_resp = res,
286d7d6a 3561 .rpc_cred = cred,
1da177e4 3562 };
bc4785cd 3563 __be32 *p;
1da177e4
LT		 3564 int loop = 0;
3565 int status;
3566
bc4785cd 3567 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3568 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3569 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3570
3571 for(;;) {
3572 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3573 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3574 clp->cl_ipaddr,
3575 rpc_peeraddr2str(clp->cl_rpcclient,
3576 RPC_DISPLAY_ADDR),
69dd716c
TM		 3577 rpc_peeraddr2str(clp->cl_rpcclient,
3578 RPC_DISPLAY_PROTO),
78ea323b 3579 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3580 clp->cl_id_uniquifier);
3581 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3582 sizeof(setclientid.sc_netid),
3583 rpc_peeraddr2str(clp->cl_rpcclient,
3584 RPC_DISPLAY_NETID));
1da177e4 3585 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3586 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3587 clp->cl_ipaddr, port >> 8, port & 255);
3588
3589 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3590 if (status != -NFS4ERR_CLID_INUSE)
3591 break;
3592 if (signalled())
3593 break;
3594 if (loop++ & 1)
611c96c8 3595 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3596 else
3597 if (++clp->cl_id_uniquifier == 0)
3598 break;
3599 }
3600 return status;
3601}
3602
bb8b27e5
TM		 3603static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3604 struct nfs4_setclientid_res *arg,
3605 struct rpc_cred *cred)
1da177e4
LT		 3606{
3607 struct nfs_fsinfo fsinfo;
3608 struct rpc_message msg = {
3609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3610 .rpc_argp = arg,
1da177e4 3611 .rpc_resp = &fsinfo,
286d7d6a 3612 .rpc_cred = cred,
1da177e4
LT		 3613 };
3614 unsigned long now;
3615 int status;
3616
3617 now = jiffies;
3618 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3619 if (status == 0) {
3620 spin_lock(&clp->cl_lock);
3621 clp->cl_lease_time = fsinfo.lease_time * HZ;
3622 clp->cl_last_renewal = now;
3623 spin_unlock(&clp->cl_lock);
3624 }
3625 return status;
3626}
3627
bb8b27e5
TM		 3628int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3629 struct nfs4_setclientid_res *arg,
3630 struct rpc_cred *cred)
51581f3b 3631{
77e03677 3632 long timeout = 0;
51581f3b
TM		 3633 int err;
3634 do {
bb8b27e5 3635 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3636 switch (err) {
3637 case 0:
3638 return err;
3639 case -NFS4ERR_RESOURCE:
3640 /* The IBM lawyers misread another document! */
3641 case -NFS4ERR_DELAY:
3642 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3643 }
3644 } while (err == 0);
3645 return err;
3646}
3647
fe650407
TM		 3648struct nfs4_delegreturndata {
3649 struct nfs4_delegreturnargs args;
fa178f29 3650 struct nfs4_delegreturnres res;
fe650407
TM		 3651 struct nfs_fh fh;
3652 nfs4_stateid stateid;
26e976a8 3653 unsigned long timestamp;
fa178f29 3654 struct nfs_fattr fattr;
fe650407
TM		 3655 int rpc_status;
3656};
3657
fe650407
TM		 3658static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3659{
3660 struct nfs4_delegreturndata *data = calldata;
938e1010 3661
14516c3a
TM		 3662 if (!nfs4_sequence_done(task, &data->res.seq_res))
3663 return;
938e1010 3664
79708861
RL		 3665 switch (task->tk_status) {
3666 case -NFS4ERR_STALE_STATEID:
3667 case -NFS4ERR_EXPIRED:
3668 case 0:
fa178f29 3669 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3670 break;
3671 default:
3672 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3673 -EAGAIN) {
3674 nfs_restart_rpc(task, data->res.server->nfs_client);
3675 return;
3676 }
3677 }
3678 data->rpc_status = task->tk_status;
fe650407
TM		 3679}
3680
3681static void nfs4_delegreturn_release(void *calldata)
3682{
fe650407
TM		 3683 kfree(calldata);
3684}
3685
938e1010
AA		 3686#if defined(CONFIG_NFS_V4_1)
3687static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3688{
3689 struct nfs4_delegreturndata *d_data;
3690
3691 d_data = (struct nfs4_delegreturndata *)data;
3692
035168ab 3693 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3694 &d_data->args.seq_args,
3695 &d_data->res.seq_res, 1, task))
3696 return;
3697 rpc_call_start(task);
3698}
3699#endif /* CONFIG_NFS_V4_1 */
3700
c8d149f3 3701static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3702#if defined(CONFIG_NFS_V4_1)
3703 .rpc_call_prepare = nfs4_delegreturn_prepare,
3704#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3705 .rpc_call_done = nfs4_delegreturn_done,
3706 .rpc_release = nfs4_delegreturn_release,
3707};
3708
e6f81075 3709static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3710{
3711 struct nfs4_delegreturndata *data;
fa178f29 3712 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3713 struct rpc_task *task;
5138fde0
TM		 3714 struct rpc_message msg = {
3715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3716 .rpc_cred = cred,
3717 };
c970aa85
TM		 3718 struct rpc_task_setup task_setup_data = {
3719 .rpc_client = server->client,
5138fde0 3720 .rpc_message = &msg,
c970aa85
TM		 3721 .callback_ops = &nfs4_delegreturn_ops,
3722 .flags = RPC_TASK_ASYNC,
3723 };
e6f81075 3724 int status = 0;
fe650407 3725
8535b2be 3726 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3727 if (data == NULL)
3728 return -ENOMEM;
3729 data->args.fhandle = &data->fh;
3730 data->args.stateid = &data->stateid;
fa178f29 3731 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3732 nfs_copy_fh(&data->fh, NFS_FH(inode));
3733 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3734 data->res.fattr = &data->fattr;
3735 data->res.server = server;
5138fde0 3736 nfs_fattr_init(data->res.fattr);
26e976a8 3737 data->timestamp = jiffies;
fe650407
TM		 3738 data->rpc_status = 0;
3739
c970aa85 3740 task_setup_data.callback_data = data;
1174dd1f
TM		 3741 msg.rpc_argp = &data->args;
3742 msg.rpc_resp = &data->res;
c970aa85 3743 task = rpc_run_task(&task_setup_data);
7a1218a2 3744 if (IS_ERR(task))
fe650407 3745 return PTR_ERR(task);
e6f81075
TM		 3746 if (!issync)
3747 goto out;
fe650407 3748 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3749 if (status != 0)
3750 goto out;
3751 status = data->rpc_status;
3752 if (status != 0)
3753 goto out;
3754 nfs_refresh_inode(inode, &data->fattr);
3755out:
e6b3c4db 3756 rpc_put_task(task);
fe650407 3757 return status;
1da177e4
LT		 3758}
3759
e6f81075 3760int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3761{
3762 struct nfs_server *server = NFS_SERVER(inode);
3763 struct nfs4_exception exception = { };
3764 int err;
3765 do {
e6f81075 3766 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3767 switch (err) {
3768 case -NFS4ERR_STALE_STATEID:
3769 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3770 case 0:
3771 return 0;
3772 }
3773 err = nfs4_handle_exception(server, err, &exception);
3774 } while (exception.retry);
3775 return err;
3776}
3777
3778#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3779#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3780
3781/*
3782 * sleep, with exponential backoff, and retry the LOCK operation.
3783 */
3784static unsigned long
3785nfs4_set_lock_task_retry(unsigned long timeout)
3786{
150030b7 3787 schedule_timeout_killable(timeout);
1da177e4
LT		 3788 timeout <<= 1;
3789 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3790 return NFS4_LOCK_MAXTIMEOUT;
3791 return timeout;
3792}
3793
1da177e4
LT		 3794static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3795{
3796 struct inode *inode = state->inode;
3797 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3798 struct nfs_client *clp = server->nfs_client;
911d1aaf 3799 struct nfs_lockt_args arg = {
1da177e4 3800 .fh = NFS_FH(inode),
911d1aaf 3801 .fl = request,
1da177e4 3802 };
911d1aaf
TM		 3803 struct nfs_lockt_res res = {
3804 .denied = request,
1da177e4
LT		 3805 };
3806 struct rpc_message msg = {
3807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3808 .rpc_argp = &arg,
3809 .rpc_resp = &res,
3810 .rpc_cred = state->owner->so_cred,
3811 };
1da177e4
LT		 3812 struct nfs4_lock_state *lsp;
3813 int status;
3814
911d1aaf 3815 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3816 status = nfs4_set_lock_state(state, request);
3817 if (status != 0)
3818 goto out;
3819 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3820 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3821 arg.lock_owner.s_dev = server->s_dev;
cccef3b9 3822 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3823 switch (status) {
3824 case 0:
3825 request->fl_type = F_UNLCK;
3826 break;
3827 case -NFS4ERR_DENIED:
3828 status = 0;
1da177e4 3829 }
70cc6487 3830 request->fl_ops->fl_release_private(request);
8d0a8a9d 3831out:
1da177e4
LT		 3832 return status;
3833}
3834
3835static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3836{
3837 struct nfs4_exception exception = { };
3838 int err;
3839
3840 do {
3841 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3842 _nfs4_proc_getlk(state, cmd, request),
3843 &exception);
3844 } while (exception.retry);
3845 return err;
3846}
3847
3848static int do_vfs_lock(struct file *file, struct file_lock *fl)
3849{
3850 int res = 0;
3851 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3852 case FL_POSIX:
3853 res = posix_lock_file_wait(file, fl);
3854 break;
3855 case FL_FLOCK:
3856 res = flock_lock_file_wait(file, fl);
3857 break;
3858 default:
3859 BUG();
3860 }
1da177e4
LT		 3861 return res;
3862}
3863
faf5f49c 3864struct nfs4_unlockdata {
911d1aaf
TM		 3865 struct nfs_locku_args arg;
3866 struct nfs_locku_res res;
faf5f49c
TM		 3867 struct nfs4_lock_state *lsp;
3868 struct nfs_open_context *ctx;
911d1aaf
TM		 3869 struct file_lock fl;
3870 const struct nfs_server *server;
26e976a8 3871 unsigned long timestamp;
faf5f49c
TM		 3872};
3873
911d1aaf
TM		 3874static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3875 struct nfs_open_context *ctx,
3876 struct nfs4_lock_state *lsp,
3877 struct nfs_seqid *seqid)
3878{
3879 struct nfs4_unlockdata *p;
3880 struct inode *inode = lsp->ls_state->inode;
3881
8535b2be 3882 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3883 if (p == NULL)
3884 return NULL;
3885 p->arg.fh = NFS_FH(inode);
3886 p->arg.fl = &p->fl;
3887 p->arg.seqid = seqid;
c1d51931 3888 p->res.seqid = seqid;
911d1aaf
TM		 3889 p->arg.stateid = &lsp->ls_stateid;
3890 p->lsp = lsp;
3891 atomic_inc(&lsp->ls_count);
3892 /* Ensure we don't close file until we're done freeing locks! */
3893 p->ctx = get_nfs_open_context(ctx);
3894 memcpy(&p->fl, fl, sizeof(p->fl));
3895 p->server = NFS_SERVER(inode);
3896 return p;
3897}
3898
06f814a3 3899static void nfs4_locku_release_calldata(void *data)
faf5f49c 3900{
963d8fe5 3901 struct nfs4_unlockdata *calldata = data;
911d1aaf 3902 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3903 nfs4_put_lock_state(calldata->lsp);
3904 put_nfs_open_context(calldata->ctx);
3905 kfree(calldata);
faf5f49c
TM		 3906}
3907
963d8fe5 3908static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3909{
963d8fe5 3910 struct nfs4_unlockdata *calldata = data;
faf5f49c 3911
14516c3a
TM		 3912 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3913 return;
faf5f49c
TM		 3914 switch (task->tk_status) {
3915 case 0:
3916 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3917 calldata->res.stateid.data,
faf5f49c 3918 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3919 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3920 break;
9e33bed5
TM		 3921 case -NFS4ERR_BAD_STATEID:
3922 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3923 case -NFS4ERR_STALE_STATEID:
3924 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3925 break;
3926 default:
9e33bed5 3927 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 3928 nfs_restart_rpc(task,
d61e612a 3929 calldata->server->nfs_client);
faf5f49c 3930 }
faf5f49c
TM		 3931}
3932
4ce70ada 3933static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3934{
4ce70ada 3935 struct nfs4_unlockdata *calldata = data;
faf5f49c 3936
911d1aaf 3937 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3938 return;
3939 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3940 /* Note: exit _without_ running nfs4_locku_done */
3941 task->tk_action = NULL;
faf5f49c
TM		 3942 return;
3943 }
26e976a8 3944 calldata->timestamp = jiffies;
035168ab 3945 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 3946 &calldata->arg.seq_args,
3947 &calldata->res.seq_res, 1, task))
3948 return;
5138fde0 3949 rpc_call_start(task);
faf5f49c
TM		 3950}
3951
963d8fe5 3952static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3953 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3954 .rpc_call_done = nfs4_locku_done,
06f814a3 3955 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3956};
3957
a5d16a4d
TM		 3958static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3959 struct nfs_open_context *ctx,
3960 struct nfs4_lock_state *lsp,
3961 struct nfs_seqid *seqid)
3962{
3963 struct nfs4_unlockdata *data;
5138fde0
TM		 3964 struct rpc_message msg = {
3965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3966 .rpc_cred = ctx->cred,
3967 };
c970aa85
TM		 3968 struct rpc_task_setup task_setup_data = {
3969 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3970 .rpc_message = &msg,
c970aa85 3971 .callback_ops = &nfs4_locku_ops,
101070ca 3972 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3973 .flags = RPC_TASK_ASYNC,
3974 };
a5d16a4d 3975
137d6aca
FF		 3976 /* Ensure this is an unlock - when canceling a lock, the
3977 * canceled lock is passed in, and it won't be an unlock.
3978 */
3979 fl->fl_type = F_UNLCK;
3980
a5d16a4d
TM		 3981 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3982 if (data == NULL) {
3983 nfs_free_seqid(seqid);
3984 return ERR_PTR(-ENOMEM);
3985 }
3986
1174dd1f
TM		 3987 msg.rpc_argp = &data->arg;
3988 msg.rpc_resp = &data->res;
c970aa85
TM		 3989 task_setup_data.callback_data = data;
3990 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3991}
3992
faf5f49c
TM		 3993static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3994{
19e03c57 3995 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3996 struct nfs_seqid *seqid;
1da177e4 3997 struct nfs4_lock_state *lsp;
06f814a3
TM		 3998 struct rpc_task *task;
3999 int status = 0;
536ff0f8 4000 unsigned char fl_flags = request->fl_flags;
faf5f49c 4001
8d0a8a9d 4002 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4003 /* Unlock _before_ we do the RPC call */
4004 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4005 down_read(&nfsi->rwsem);
4006 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4007 up_read(&nfsi->rwsem);
9b073574 4008 goto out;
19e03c57
TM		 4009 }
4010 up_read(&nfsi->rwsem);
8d0a8a9d 4011 if (status != 0)
9b073574
TM		 4012 goto out;
4013 /* Is this a delegated lock? */
4014 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4015 goto out;
8d0a8a9d 4016 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4017 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4018 status = -ENOMEM;
911d1aaf 4019 if (seqid == NULL)
9b073574 4020 goto out;
cd3758e3 4021 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4022 status = PTR_ERR(task);
4023 if (IS_ERR(task))
9b073574 4024 goto out;
a5d16a4d 4025 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4026 rpc_put_task(task);
9b073574 4027out:
536ff0f8 4028 request->fl_flags = fl_flags;
1da177e4
LT		 4029 return status;
4030}
4031
a5d16a4d
TM		 4032struct nfs4_lockdata {
4033 struct nfs_lock_args arg;
4034 struct nfs_lock_res res;
4035 struct nfs4_lock_state *lsp;
4036 struct nfs_open_context *ctx;
4037 struct file_lock fl;
26e976a8 4038 unsigned long timestamp;
a5d16a4d
TM		 4039 int rpc_status;
4040 int cancelled;
66179efe 4041 struct nfs_server *server;
a5d16a4d
TM		 4042};
4043
4044static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4045 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4046 gfp_t gfp_mask)
1da177e4 4047{
a5d16a4d
TM		 4048 struct nfs4_lockdata *p;
4049 struct inode *inode = lsp->ls_state->inode;
1da177e4 4050 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4051
8535b2be 4052 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4053 if (p == NULL)
4054 return NULL;
4055
4056 p->arg.fh = NFS_FH(inode);
4057 p->arg.fl = &p->fl;
8535b2be 4058 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4059 if (p->arg.open_seqid == NULL)
4060 goto out_free;
8535b2be 4061 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4062 if (p->arg.lock_seqid == NULL)
2f74c0a0 4063 goto out_free_seqid;
a5d16a4d 4064 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4065 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4066 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4067 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4068 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4069 p->lsp = lsp;
66179efe 4070 p->server = server;
a5d16a4d
TM		 4071 atomic_inc(&lsp->ls_count);
4072 p->ctx = get_nfs_open_context(ctx);
4073 memcpy(&p->fl, fl, sizeof(p->fl));
4074 return p;
2f74c0a0
TM		 4075out_free_seqid:
4076 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4077out_free:
4078 kfree(p);
4079 return NULL;
4080}
4081
4082static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4083{
4084 struct nfs4_lockdata *data = calldata;
4085 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4086
3110ff80 4087 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4088 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4089 return;
a5d16a4d
TM		 4090 /* Do we need to do an open_to_lock_owner? */
4091 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4092 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4093 return;
a5d16a4d
TM		 4094 data->arg.open_stateid = &state->stateid;
4095 data->arg.new_lock_owner = 1;
c1d51931 4096 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4097 } else
4098 data->arg.new_lock_owner = 0;
26e976a8 4099 data->timestamp = jiffies;
035168ab
TM		 4100 if (nfs4_setup_sequence(data->server,
4101 &data->arg.seq_args,
66179efe
AA		 4102 &data->res.seq_res, 1, task))
4103 return;
5138fde0 4104 rpc_call_start(task);
3110ff80 4105 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4106}
4107
b257957e
AB		 4108static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4109{
4110 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4111 nfs4_lock_prepare(task, calldata);
4112}
4113
a5d16a4d
TM		 4114static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4115{
4116 struct nfs4_lockdata *data = calldata;
4117
3110ff80 4118 dprintk("%s: begin!\n", __func__);
a5d16a4d 4119
14516c3a
TM		 4120 if (!nfs4_sequence_done(task, &data->res.seq_res))
4121 return;
66179efe 4122
a5d16a4d 4123 data->rpc_status = task->tk_status;
a5d16a4d 4124 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4125 if (data->rpc_status == 0)
4126 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4127 else
4128 goto out;
4129 }
4130 if (data->rpc_status == 0) {
4131 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4132 sizeof(data->lsp->ls_stateid.data));
4133 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4134 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4135 }
a5d16a4d 4136out:
3110ff80 4137 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4138}
4139
4140static void nfs4_lock_release(void *calldata)
4141{
4142 struct nfs4_lockdata *data = calldata;
4143
3110ff80 4144 dprintk("%s: begin!\n", __func__);
2f74c0a0 4145 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4146 if (data->cancelled != 0) {
4147 struct rpc_task *task;
4148 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4149 data->arg.lock_seqid);
4150 if (!IS_ERR(task))
bf294b41 4151 rpc_put_task_async(task);
3110ff80 4152 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4153 } else
4154 nfs_free_seqid(data->arg.lock_seqid);
4155 nfs4_put_lock_state(data->lsp);
4156 put_nfs_open_context(data->ctx);
4157 kfree(data);
3110ff80 4158 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4159}
4160
4161static const struct rpc_call_ops nfs4_lock_ops = {
4162 .rpc_call_prepare = nfs4_lock_prepare,
4163 .rpc_call_done = nfs4_lock_done,
4164 .rpc_release = nfs4_lock_release,
4165};
4166
b257957e
AB		 4167static const struct rpc_call_ops nfs4_recover_lock_ops = {
4168 .rpc_call_prepare = nfs4_recover_lock_prepare,
4169 .rpc_call_done = nfs4_lock_done,
4170 .rpc_release = nfs4_lock_release,
4171};
4172
2bee72a6
TM		 4173static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4174{
2bee72a6
TM		 4175 switch (error) {
4176 case -NFS4ERR_ADMIN_REVOKED:
4177 case -NFS4ERR_BAD_STATEID:
ecac799a 4178 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4179 if (new_lock_owner != 0 ||
4180 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4181 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4182 break;
4183 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4184 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4185 case -NFS4ERR_EXPIRED:
4186 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4187 };
4188}
4189
afe6c27c 4190static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4191{
4192 struct nfs4_lockdata *data;
4193 struct rpc_task *task;
5138fde0
TM		 4194 struct rpc_message msg = {
4195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4196 .rpc_cred = state->owner->so_cred,
4197 };
c970aa85
TM		 4198 struct rpc_task_setup task_setup_data = {
4199 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4200 .rpc_message = &msg,
c970aa85 4201 .callback_ops = &nfs4_lock_ops,
101070ca 4202 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4203 .flags = RPC_TASK_ASYNC,
4204 };
a5d16a4d
TM		 4205 int ret;
4206
3110ff80 4207 dprintk("%s: begin!\n", __func__);
cd3758e3 4208 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4209 fl->fl_u.nfs4_fl.owner,
4210 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4211 if (data == NULL)
4212 return -ENOMEM;
4213 if (IS_SETLKW(cmd))
4214 data->arg.block = 1;
b257957e
AB		 4215 if (recovery_type > NFS_LOCK_NEW) {
4216 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4217 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4218 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4219 }
1174dd1f
TM		 4220 msg.rpc_argp = &data->arg;
4221 msg.rpc_resp = &data->res;
c970aa85
TM		 4222 task_setup_data.callback_data = data;
4223 task = rpc_run_task(&task_setup_data);
7a1218a2 4224 if (IS_ERR(task))
a5d16a4d 4225 return PTR_ERR(task);
a5d16a4d
TM		 4226 ret = nfs4_wait_for_completion_rpc_task(task);
4227 if (ret == 0) {
4228 ret = data->rpc_status;
2bee72a6
TM		 4229 if (ret)
4230 nfs4_handle_setlk_error(data->server, data->lsp,
4231 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4232 } else
4233 data->cancelled = 1;
e6b3c4db 4234 rpc_put_task(task);
3110ff80 4235 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4236 return ret;
1da177e4
LT		 4237}
4238
4239static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4240{
202b50dc
TM		 4241 struct nfs_server *server = NFS_SERVER(state->inode);
4242 struct nfs4_exception exception = { };
4243 int err;
4244
4245 do {
42a2d13e
TM		 4246 /* Cache the lock if possible... */
4247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4248 return 0;
afe6c27c 4249 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4250 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4251 break;
4252 nfs4_handle_exception(server, err, &exception);
4253 } while (exception.retry);
4254 return err;
1da177e4
LT		 4255}
4256
4257static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4258{
202b50dc
TM		 4259 struct nfs_server *server = NFS_SERVER(state->inode);
4260 struct nfs4_exception exception = { };
4261 int err;
4262
6bfc93ef
TM		 4263 err = nfs4_set_lock_state(state, request);
4264 if (err != 0)
4265 return err;
202b50dc 4266 do {
42a2d13e
TM		 4267 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4268 return 0;
afe6c27c 4269 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4270 switch (err) {
4271 default:
4272 goto out;
4273 case -NFS4ERR_GRACE:
4274 case -NFS4ERR_DELAY:
4275 nfs4_handle_exception(server, err, &exception);
4276 err = 0;
4277 }
202b50dc 4278 } while (exception.retry);
a9ed2e25 4279out:
202b50dc 4280 return err;
1da177e4
LT		 4281}
4282
4283static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4284{
19e03c57 4285 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4286 unsigned char fl_flags = request->fl_flags;
8e469ebd 4287 int status = -ENOLCK;
1da177e4 4288
8e469ebd
TM		 4289 if ((fl_flags & FL_POSIX) &&
4290 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4291 goto out;
6bfc93ef 4292 /* Is this a delegated open? */
6bfc93ef
TM		 4293 status = nfs4_set_lock_state(state, request);
4294 if (status != 0)
4295 goto out;
01c3b861
TM		 4296 request->fl_flags |= FL_ACCESS;
4297 status = do_vfs_lock(request->fl_file, request);
4298 if (status < 0)
4299 goto out;
19e03c57 4300 down_read(&nfsi->rwsem);
01c3b861 4301 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4302 /* Yes: cache locks! */
01c3b861 4303 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4304 request->fl_flags = fl_flags & ~FL_SLEEP;
4305 status = do_vfs_lock(request->fl_file, request);
4306 goto out_unlock;
01c3b861 4307 }
afe6c27c 4308 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4309 if (status != 0)
01c3b861 4310 goto out_unlock;
6bfc93ef 4311 /* Note: we always want to sleep here! */
01c3b861 4312 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4313 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4314 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4315out_unlock:
19e03c57 4316 up_read(&nfsi->rwsem);
01c3b861
TM		 4317out:
4318 request->fl_flags = fl_flags;
1da177e4
LT		 4319 return status;
4320}
4321
4322static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4323{
4324 struct nfs4_exception exception = { };
4325 int err;
4326
4327 do {
965b5d67
TM		 4328 err = _nfs4_proc_setlk(state, cmd, request);
4329 if (err == -NFS4ERR_DENIED)
4330 err = -EAGAIN;
1da177e4 4331 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4332 err, &exception);
1da177e4
LT		 4333 } while (exception.retry);
4334 return err;
4335}
4336
4337static int
4338nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4339{
4340 struct nfs_open_context *ctx;
4341 struct nfs4_state *state;
4342 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4343 int status;
4344
4345 /* verify open state */
cd3758e3 4346 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4347 state = ctx->state;
4348
4349 if (request->fl_start < 0 || request->fl_end < 0)
4350 return -EINVAL;
4351
d953126a
TM		 4352 if (IS_GETLK(cmd)) {
4353 if (state != NULL)
4354 return nfs4_proc_getlk(state, F_GETLK, request);
4355 return 0;
4356 }
1da177e4
LT		 4357
4358 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4359 return -EINVAL;
4360
d953126a
TM		 4361 if (request->fl_type == F_UNLCK) {
4362 if (state != NULL)
4363 return nfs4_proc_unlck(state, cmd, request);
4364 return 0;
4365 }
1da177e4 4366
d953126a
TM		 4367 if (state == NULL)
4368 return -ENOLCK;
1da177e4
LT		 4369 do {
4370 status = nfs4_proc_setlk(state, cmd, request);
4371 if ((status != -EAGAIN) || IS_SETLK(cmd))
4372 break;
4373 timeout = nfs4_set_lock_task_retry(timeout);
4374 status = -ERESTARTSYS;
4375 if (signalled())
4376 break;
4377 } while(status < 0);
1da177e4
LT		 4378 return status;
4379}
4380
888e694c
TM		 4381int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4382{
4383 struct nfs_server *server = NFS_SERVER(state->inode);
4384 struct nfs4_exception exception = { };
4385 int err;
4386
4387 err = nfs4_set_lock_state(state, fl);
4388 if (err != 0)
4389 goto out;
4390 do {
afe6c27c 4391 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4392 switch (err) {
4393 default:
4394 printk(KERN_ERR "%s: unhandled error %d.\n",
4395 __func__, err);
4396 case 0:
965b5d67 4397 case -ESTALE:
d5122201
TM		 4398 goto out;
4399 case -NFS4ERR_EXPIRED:
4400 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4401 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4402 nfs4_schedule_lease_recovery(server->nfs_client);
4403 goto out;
74e7bb73
RL		 4404 case -NFS4ERR_BADSESSION:
4405 case -NFS4ERR_BADSLOT:
4406 case -NFS4ERR_BAD_HIGH_SLOT:
4407 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4408 case -NFS4ERR_DEADSESSION:
0400a6b0 4409 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4410 goto out;
965b5d67
TM		 4411 case -ERESTARTSYS:
4412 /*
4413 * The show must go on: exit, but mark the
4414 * stateid as needing recovery.
4415 */
4416 case -NFS4ERR_ADMIN_REVOKED:
4417 case -NFS4ERR_BAD_STATEID:
4418 case -NFS4ERR_OPENMODE:
0400a6b0 4419 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4420 err = 0;
4421 goto out;
168667c4
TM		 4422 case -EKEYEXPIRED:
4423 /*
4424 * User RPCSEC_GSS context has expired.
4425 * We cannot recover this stateid now, so
4426 * skip it and allow recovery thread to
4427 * proceed.
4428 */
4429 err = 0;
4430 goto out;
965b5d67
TM		 4431 case -ENOMEM:
4432 case -NFS4ERR_DENIED:
4433 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4434 err = 0;
4435 goto out;
d5122201
TM		 4436 case -NFS4ERR_DELAY:
4437 break;
4438 }
888e694c
TM		 4439 err = nfs4_handle_exception(server, err, &exception);
4440 } while (exception.retry);
4441out:
4442 return err;
4443}
6b3b5496 4444
d3c7b7cc
TM		 4445static void nfs4_release_lockowner_release(void *calldata)
4446{
4447 kfree(calldata);
4448}
4449
4450const struct rpc_call_ops nfs4_release_lockowner_ops = {
4451 .rpc_release = nfs4_release_lockowner_release,
4452};
4453
4454void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4455{
4456 struct nfs_server *server = lsp->ls_state->owner->so_server;
4457 struct nfs_release_lockowner_args *args;
4458 struct rpc_message msg = {
4459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4460 };
4461
4462 if (server->nfs_client->cl_mvops->minor_version != 0)
4463 return;
4464 args = kmalloc(sizeof(*args), GFP_NOFS);
4465 if (!args)
4466 return;
4467 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4468 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4469 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4470 msg.rpc_argp = args;
4471 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4472}
4473
aa1870af
BF		 4474#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4475
64c2ce8b
AK		 4476static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4477 const void *buf, size_t buflen,
4478 int flags, int type)
6b3b5496 4479{
64c2ce8b
AK		 4480 if (strcmp(key, "") != 0)
4481 return -EINVAL;
4b580ee3 4482
64c2ce8b 4483 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4484}
4485
64c2ce8b
AK		 4486static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4487 void *buf, size_t buflen, int type)
6b3b5496 4488{
64c2ce8b
AK		 4489 if (strcmp(key, "") != 0)
4490 return -EINVAL;
aa1870af 4491
64c2ce8b 4492 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4493}
4494
64c2ce8b
AK		 4495static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4496 size_t list_len, const char *name,
4497 size_t name_len, int type)
6b3b5496 4498{
64c2ce8b 4499 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4500
096455a2
BF		 4501 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4502 return 0;
64c2ce8b
AK		 4503
4504 if (list && len <= list_len)
4505 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4506 return len;
6b3b5496
BF		 4507}
4508
69aaaae1
TM		 4509static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4510{
4511 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4512 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4513 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4514 return;
4515
4516 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4517 NFS_ATTR_FATTR_NLINK;
4518 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4519 fattr->nlink = 2;
4520}
4521
56659e99 4522int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4523 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4524{
4525 struct nfs_server *server = NFS_SERVER(dir);
4526 u32 bitmask[2] = {
361e624f
MN		 4527 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4528 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4529 };
4530 struct nfs4_fs_locations_arg args = {
4531 .dir_fh = NFS_FH(dir),
c228fd3a 4532 .name = name,
683b57b4
TM		 4533 .page = page,
4534 .bitmask = bitmask,
4535 };
22958463
BH		 4536 struct nfs4_fs_locations_res res = {
4537 .fs_locations = fs_locations,
4538 };
683b57b4
TM		 4539 struct rpc_message msg = {
4540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4541 .rpc_argp = &args,
22958463 4542 .rpc_resp = &res,
683b57b4
TM		 4543 };
4544 int status;
4545
3110ff80 4546 dprintk("%s: start\n", __func__);
c228fd3a 4547 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4548 fs_locations->server = server;
830b8e33 4549 fs_locations->nlocations = 0;
cccef3b9 4550 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4551 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4552 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4553 return status;
4554}
4555
557134a3 4556#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4557/*
4558 * Check the exchange flags returned by the server for invalid flags, having
4559 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4560 * DS flags set.
4561 */
4562static int nfs4_check_cl_exchange_flags(u32 flags)
4563{
4564 if (flags & ~EXCHGID4_FLAG_MASK_R)
4565 goto out_inval;
4566 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4567 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4568 goto out_inval;
4569 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4570 goto out_inval;
4571 return NFS_OK;
4572out_inval:
4573 return -NFS4ERR_INVAL;
4574}
4575
99fe60d0
BH		 4576/*
4577 * nfs4_proc_exchange_id()
4578 *
4579 * Since the clientid has expired, all compounds using sessions
4580 * associated with the stale clientid will be returning
4581 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4582 * be in some phase of session reset.
4583 */
4d643d1d 4584int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4585{
4586 nfs4_verifier verifier;
4587 struct nfs41_exchange_id_args args = {
4588 .client = clp,
357f54d6 4589 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4590 };
4591 struct nfs41_exchange_id_res res = {
4592 .client = clp,
4593 };
4594 int status;
4595 struct rpc_message msg = {
4596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4597 .rpc_argp = &args,
4598 .rpc_resp = &res,
4599 .rpc_cred = cred,
4600 };
4601 __be32 *p;
4602
4603 dprintk("--> %s\n", __func__);
4604 BUG_ON(clp == NULL);
a7b72103 4605
99fe60d0
BH		 4606 p = (u32 *)verifier.data;
4607 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4608 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4609 args.verifier = &verifier;
4610
c7a360b0
AA		 4611 args.id_len = scnprintf(args.id, sizeof(args.id),
4612 "%s/%s.%s/%u",
4613 clp->cl_ipaddr,
4614 init_utsname()->nodename,
4615 init_utsname()->domainname,
4616 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4617
c7a360b0
AA		 4618 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4619 if (!status)
4620 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4621 dprintk("<-- %s status= %d\n", __func__, status);
4622 return status;
4623}
4624
2050f0cc
AA		 4625struct nfs4_get_lease_time_data {
4626 struct nfs4_get_lease_time_args *args;
4627 struct nfs4_get_lease_time_res *res;
4628 struct nfs_client *clp;
4629};
4630
4631static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4632 void *calldata)
4633{
4634 int ret;
4635 struct nfs4_get_lease_time_data *data =
4636 (struct nfs4_get_lease_time_data *)calldata;
4637
4638 dprintk("--> %s\n", __func__);
689cf5c1 4639 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4640 /* just setup sequence, do not trigger session recovery
4641 since we're invoked within one */
4642 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4643 &data->args->la_seq_args,
4644 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4645
4646 BUG_ON(ret == -EAGAIN);
4647 rpc_call_start(task);
4648 dprintk("<-- %s\n", __func__);
4649}
4650
4651/*
4652 * Called from nfs4_state_manager thread for session setup, so don't recover
4653 * from sequence operation or clientid errors.
4654 */
4655static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4656{
4657 struct nfs4_get_lease_time_data *data =
4658 (struct nfs4_get_lease_time_data *)calldata;
4659
4660 dprintk("--> %s\n", __func__);
14516c3a
TM		 4661 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4662 return;
2050f0cc
AA		 4663 switch (task->tk_status) {
4664 case -NFS4ERR_DELAY:
4665 case -NFS4ERR_GRACE:
4666 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4667 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4668 task->tk_status = 0;
0110ee15 4669 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4670 return;
4671 }
2050f0cc
AA		 4672 dprintk("<-- %s\n", __func__);
4673}
4674
4675struct rpc_call_ops nfs4_get_lease_time_ops = {
4676 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4677 .rpc_call_done = nfs4_get_lease_time_done,
4678};
4679
4680int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4681{
4682 struct rpc_task *task;
4683 struct nfs4_get_lease_time_args args;
4684 struct nfs4_get_lease_time_res res = {
4685 .lr_fsinfo = fsinfo,
4686 };
4687 struct nfs4_get_lease_time_data data = {
4688 .args = &args,
4689 .res = &res,
4690 .clp = clp,
4691 };
4692 struct rpc_message msg = {
4693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4694 .rpc_argp = &args,
4695 .rpc_resp = &res,
4696 };
4697 struct rpc_task_setup task_setup = {
4698 .rpc_client = clp->cl_rpcclient,
4699 .rpc_message = &msg,
4700 .callback_ops = &nfs4_get_lease_time_ops,
4701 .callback_data = &data
4702 };
4703 int status;
4704
2050f0cc
AA		 4705 dprintk("--> %s\n", __func__);
4706 task = rpc_run_task(&task_setup);
4707
4708 if (IS_ERR(task))
4709 status = PTR_ERR(task);
4710 else {
4711 status = task->tk_status;
4712 rpc_put_task(task);
4713 }
4714 dprintk("<-- %s return %d\n", __func__, status);
4715
4716 return status;
4717}
4718
b73dafa7
RL		 4719/*
4720 * Reset a slot table
4721 */
104aeba4
AA		 4722static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4723 int ivalue)
ac72b7b3 4724{
104aeba4 4725 struct nfs4_slot *new = NULL;
b73dafa7 4726 int i;
ac72b7b3
AA		 4727 int ret = 0;
4728
104aeba4
AA		 4729 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4730 max_reqs, tbl->max_slots);
ac72b7b3 4731
104aeba4
AA		 4732 /* Does the newly negotiated max_reqs match the existing slot table? */
4733 if (max_reqs != tbl->max_slots) {
4734 ret = -ENOMEM;
4735 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4736 GFP_NOFS);
104aeba4
AA		 4737 if (!new)
4738 goto out;
4739 ret = 0;
4740 kfree(tbl->slots);
ac72b7b3
AA		 4741 }
4742 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4743 if (new) {
4744 tbl->slots = new;
4745 tbl->max_slots = max_reqs;
4746 }
4747 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4748 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4749 spin_unlock(&tbl->slot_tbl_lock);
4750 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4751 tbl, tbl->slots, tbl->max_slots);
4752out:
4753 dprintk("<-- %s: return %d\n", __func__, ret);
4754 return ret;
4755}
4756
b73dafa7
RL		 4757/*
4758 * Reset the forechannel and backchannel slot tables
4759 */
4760static int nfs4_reset_slot_tables(struct nfs4_session *session)
4761{
4762 int status;
4763
4764 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4765 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4766 if (status)
4767 return status;
4768
4769 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4770 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4771 return status;
4772}
4773
f8625a6a
RL		 4774/* Destroy the slot table */
4775static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4776{
4777 if (session->fc_slot_table.slots != NULL) {
4778 kfree(session->fc_slot_table.slots);
4779 session->fc_slot_table.slots = NULL;
4780 }
4781 if (session->bc_slot_table.slots != NULL) {
4782 kfree(session->bc_slot_table.slots);
4783 session->bc_slot_table.slots = NULL;
4784 }
4785 return;
4786}
4787
fc931582
AA		 4788/*
4789 * Initialize slot table
4790 */
050047ce
RL		 4791static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4792 int max_slots, int ivalue)
fc931582 4793{
fc931582
AA		 4794 struct nfs4_slot *slot;
4795 int ret = -ENOMEM;
4796
4797 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4798
050047ce 4799 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4800
8535b2be 4801 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4802 if (!slot)
4803 goto out;
fc931582
AA		 4804 ret = 0;
4805
4806 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4807 tbl->max_slots = max_slots;
4808 tbl->slots = slot;
4809 tbl->highest_used_slotid = -1; /* no slot is currently used */
4810 spin_unlock(&tbl->slot_tbl_lock);
4811 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4812 tbl, tbl->slots, tbl->max_slots);
4813out:
4814 dprintk("<-- %s: return %d\n", __func__, ret);
4815 return ret;
fc931582
AA		 4816}
4817
050047ce
RL		 4818/*
4819 * Initialize the forechannel and backchannel tables
4820 */
4821static int nfs4_init_slot_tables(struct nfs4_session *session)
4822{
f26468fb
TM		 4823 struct nfs4_slot_table *tbl;
4824 int status = 0;
050047ce 4825
f26468fb
TM		 4826 tbl = &session->fc_slot_table;
4827 if (tbl->slots == NULL) {
4828 status = nfs4_init_slot_table(tbl,
4829 session->fc_attrs.max_reqs, 1);
4830 if (status)
4831 return status;
4832 }
050047ce 4833
f26468fb
TM		 4834 tbl = &session->bc_slot_table;
4835 if (tbl->slots == NULL) {
4836 status = nfs4_init_slot_table(tbl,
4837 session->bc_attrs.max_reqs, 0);
4838 if (status)
4839 nfs4_destroy_slot_tables(session);
4840 }
f8625a6a
RL		 4841
4842 return status;
557134a3
AA		 4843}
4844
4845struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4846{
4847 struct nfs4_session *session;
4848 struct nfs4_slot_table *tbl;
4849
8535b2be 4850 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4851 if (!session)
4852 return NULL;
76db6d95 4853
557134a3 4854 tbl = &session->fc_slot_table;
9dfdf404 4855 tbl->highest_used_slotid = -1;
557134a3 4856 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4857 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 4858 init_completion(&tbl->complete);
f8625a6a
RL		 4859
4860 tbl = &session->bc_slot_table;
9dfdf404 4861 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4862 spin_lock_init(&tbl->slot_tbl_lock);
4863 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 4864 init_completion(&tbl->complete);
f8625a6a 4865
1055d76d
TM		 4866 session->session_state = 1<<NFS4_SESSION_INITING;
4867
557134a3
AA		 4868 session->clp = clp;
4869 return session;
4870}
4871
4872void nfs4_destroy_session(struct nfs4_session *session)
4873{
5a0ffe54
AA		 4874 nfs4_proc_destroy_session(session);
4875 dprintk("%s Destroy backchannel for xprt %p\n",
4876 __func__, session->clp->cl_rpcclient->cl_xprt);
4877 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4878 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4879 nfs4_destroy_slot_tables(session);
557134a3
AA		 4880 kfree(session);
4881}
4882
fc931582
AA		 4883/*
4884 * Initialize the values to be used by the client in CREATE_SESSION
4885 * If nfs4_init_session set the fore channel request and response sizes,
4886 * use them.
4887 *
4888 * Set the back channel max_resp_sz_cached to zero to force the client to
4889 * always set csa_cachethis to FALSE because the current implementation
4890 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4891 */
4892static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4893{
4894 struct nfs4_session *session = args->client->cl_session;
4895 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4896 mxresp_sz = session->fc_attrs.max_resp_sz;
4897
4898 if (mxrqst_sz == 0)
4899 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4900 if (mxresp_sz == 0)
4901 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4902 /* Fore channel attributes */
4903 args->fc_attrs.headerpadsz = 0;
4904 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4905 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4906 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4907 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4908
4909 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4910 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4911 __func__,
4912 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4913 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 4914
4915 /* Back channel attributes */
4916 args->bc_attrs.headerpadsz = 0;
4917 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4918 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4919 args->bc_attrs.max_resp_sz_cached = 0;
4920 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4921 args->bc_attrs.max_reqs = 1;
4922
4923 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4924 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4925 __func__,
4926 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4927 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4928 args->bc_attrs.max_reqs);
4929}
4930
43c2e885 4931static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 4932{
43c2e885
BF		 4933 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4934 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4935
4936 if (rcvd->headerpadsz > sent->headerpadsz)
4937 return -EINVAL;
4938 if (rcvd->max_resp_sz > sent->max_resp_sz)
4939 return -EINVAL;
4940 /*
4941 * Our requested max_ops is the minimum we need; we're not
4942 * prepared to break up compounds into smaller pieces than that.
4943 * So, no point even trying to continue if the server won't
4944 * cooperate:
4945 */
4946 if (rcvd->max_ops < sent->max_ops)
4947 return -EINVAL;
4948 if (rcvd->max_reqs == 0)
4949 return -EINVAL;
4950 return 0;
8d35301d
AA		 4951}
4952
43c2e885
BF		 4953static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4954{
4955 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4956 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 4957
43c2e885
BF		 4958 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4959 return -EINVAL;
4960 if (rcvd->max_resp_sz < sent->max_resp_sz)
4961 return -EINVAL;
4962 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4963 return -EINVAL;
4964 /* These would render the backchannel useless: */
4965 if (rcvd->max_ops == 0)
4966 return -EINVAL;
4967 if (rcvd->max_reqs == 0)
4968 return -EINVAL;
4969 return 0;
4970}
8d35301d 4971
8d35301d
AA		 4972static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4973 struct nfs4_session *session)
4974{
43c2e885 4975 int ret;
8d35301d 4976
43c2e885
BF		 4977 ret = nfs4_verify_fore_channel_attrs(args, session);
4978 if (ret)
4979 return ret;
4980 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 4981}
4982
fc931582
AA		 4983static int _nfs4_proc_create_session(struct nfs_client *clp)
4984{
4985 struct nfs4_session *session = clp->cl_session;
4986 struct nfs41_create_session_args args = {
4987 .client = clp,
4988 .cb_program = NFS4_CALLBACK,
4989 };
4990 struct nfs41_create_session_res res = {
4991 .client = clp,
4992 };
4993 struct rpc_message msg = {
4994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4995 .rpc_argp = &args,
4996 .rpc_resp = &res,
4997 };
4998 int status;
4999
5000 nfs4_init_channel_attrs(&args);
0f91421e 5001 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5002
5003 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5004
8d35301d
AA		 5005 if (!status)
5006 /* Verify the session's negotiated channel_attrs values */
5007 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5008 if (!status) {
5009 /* Increment the clientid slot sequence id */
5010 clp->cl_seqid++;
5011 }
5012
5013 return status;
5014}
5015
5016/*
5017 * Issues a CREATE_SESSION operation to the server.
5018 * It is the responsibility of the caller to verify the session is
5019 * expired before calling this routine.
5020 */
f26468fb 5021int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5022{
5023 int status;
5024 unsigned *ptr;
fc931582 5025 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5026 long timeout = 0;
5027 int err;
fc931582
AA		 5028
5029 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5030
7d6d63d6
RL		 5031 do {
5032 status = _nfs4_proc_create_session(clp);
5033 if (status == -NFS4ERR_DELAY) {
5034 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5035 if (err)
5036 status = err;
5037 }
5038 } while (status == -NFS4ERR_DELAY);
5039
fc931582
AA		 5040 if (status)
5041 goto out;
5042
f26468fb
TM		 5043 /* Init and reset the fore channel */
5044 status = nfs4_init_slot_tables(session);
5045 dprintk("slot table initialization returned %d\n", status);
5046 if (status)
5047 goto out;
5048 status = nfs4_reset_slot_tables(session);
5049 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5050 if (status)
5051 goto out;
5052
5053 ptr = (unsigned *)&session->sess_id.data[0];
5054 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5055 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5056out:
5057 dprintk("<-- %s\n", __func__);
5058 return status;
5059}
5060
0f3e66c6
AA		 5061/*
5062 * Issue the over-the-wire RPC DESTROY_SESSION.
5063 * The caller must serialize access to this routine.
5064 */
5065int nfs4_proc_destroy_session(struct nfs4_session *session)
5066{
5067 int status = 0;
5068 struct rpc_message msg;
5069
5070 dprintk("--> nfs4_proc_destroy_session\n");
5071
5072 /* session is still being setup */
5073 if (session->clp->cl_cons_state != NFS_CS_READY)
5074 return status;
5075
5076 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5077 msg.rpc_argp = session;
5078 msg.rpc_resp = NULL;
5079 msg.rpc_cred = NULL;
5080 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5081
5082 if (status)
5083 printk(KERN_WARNING
5084 "Got error %d from the server on DESTROY_SESSION. "
5085 "Session has been destroyed regardless...\n", status);
5086
5087 dprintk("<-- nfs4_proc_destroy_session\n");
5088 return status;
5089}
5090
fccba804
TM		 5091int nfs4_init_session(struct nfs_server *server)
5092{
5093 struct nfs_client *clp = server->nfs_client;
2449ea2e 5094 struct nfs4_session *session;
68bf05ef 5095 unsigned int rsize, wsize;
fccba804
TM		 5096 int ret;
5097
5098 if (!nfs4_has_session(clp))
5099 return 0;
5100
1055d76d
TM		 5101 session = clp->cl_session;
5102 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5103 return 0;
5104
68bf05ef
AA		 5105 rsize = server->rsize;
5106 if (rsize == 0)
5107 rsize = NFS_MAX_FILE_IO_SIZE;
5108 wsize = server->wsize;
5109 if (wsize == 0)
5110 wsize = NFS_MAX_FILE_IO_SIZE;
5111
68bf05ef
AA		 5112 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5113 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5114
fccba804
TM		 5115 ret = nfs4_recover_expired_lease(server);
5116 if (!ret)
5117 ret = nfs4_check_client_ready(clp);
5118 return ret;
5119}
5120
fc01cea9
AA		 5121/*
5122 * Renew the cl_session lease.
5123 */
d5f8d3fe
TM		 5124struct nfs4_sequence_data {
5125 struct nfs_client *clp;
5126 struct nfs4_sequence_args args;
5127 struct nfs4_sequence_res res;
5128};
5129
dc96aef9
AB		 5130static void nfs41_sequence_release(void *data)
5131{
d5f8d3fe
TM		 5132 struct nfs4_sequence_data *calldata = data;
5133 struct nfs_client *clp = calldata->clp;
dc96aef9 5134
7135840f
AB		 5135 if (atomic_read(&clp->cl_count) > 1)
5136 nfs4_schedule_state_renewal(clp);
5137 nfs_put_client(clp);
d5f8d3fe 5138 kfree(calldata);
dc96aef9
AB		 5139}
5140
aa5190d0
TM		 5141static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5142{
5143 switch(task->tk_status) {
5144 case -NFS4ERR_DELAY:
aa5190d0
TM		 5145 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5146 return -EAGAIN;
5147 default:
0400a6b0 5148 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5149 }
5150 return 0;
5151}
5152
dc96aef9 5153static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5154{
d5f8d3fe
TM		 5155 struct nfs4_sequence_data *calldata = data;
5156 struct nfs_client *clp = calldata->clp;
fc01cea9 5157
14516c3a
TM		 5158 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5159 return;
fc01cea9
AA		 5160
5161 if (task->tk_status < 0) {
5162 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5163 if (atomic_read(&clp->cl_count) == 1)
5164 goto out;
fc01cea9 5165
aa5190d0
TM		 5166 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5167 rpc_restart_call_prepare(task);
fc01cea9
AA		 5168 return;
5169 }
5170 }
fc01cea9 5171 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5172out:
fc01cea9
AA		 5173 dprintk("<-- %s\n", __func__);
5174}
5175
5176static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5177{
d5f8d3fe
TM		 5178 struct nfs4_sequence_data *calldata = data;
5179 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5180 struct nfs4_sequence_args *args;
5181 struct nfs4_sequence_res *res;
5182
fc01cea9
AA		 5183 args = task->tk_msg.rpc_argp;
5184 res = task->tk_msg.rpc_resp;
5185
035168ab 5186 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5187 return;
5188 rpc_call_start(task);
5189}
5190
5191static const struct rpc_call_ops nfs41_sequence_ops = {
5192 .rpc_call_done = nfs41_sequence_call_done,
5193 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5194 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5195};
5196
71ac6da9 5197static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5198{
d5f8d3fe 5199 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5202 .rpc_cred = cred,
5203 };
71ac6da9
TM		 5204 struct rpc_task_setup task_setup_data = {
5205 .rpc_client = clp->cl_rpcclient,
5206 .rpc_message = &msg,
5207 .callback_ops = &nfs41_sequence_ops,
5208 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5209 };
fc01cea9 5210
7135840f 5211 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5212 return ERR_PTR(-EIO);
dfb4f309 5213 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5214 if (calldata == NULL) {
7135840f 5215 nfs_put_client(clp);
71ac6da9 5216 return ERR_PTR(-ENOMEM);
fc01cea9 5217 }
d5f8d3fe
TM		 5218 msg.rpc_argp = &calldata->args;
5219 msg.rpc_resp = &calldata->res;
5220 calldata->clp = clp;
71ac6da9 5221 task_setup_data.callback_data = calldata;
fc01cea9 5222
71ac6da9
TM		 5223 return rpc_run_task(&task_setup_data);
5224}
5225
5226static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5227{
5228 struct rpc_task *task;
5229 int ret = 0;
5230
5231 task = _nfs41_proc_sequence(clp, cred);
5232 if (IS_ERR(task))
5233 ret = PTR_ERR(task);
5234 else
bf294b41 5235 rpc_put_task_async(task);
71ac6da9
TM		 5236 dprintk("<-- %s status=%d\n", __func__, ret);
5237 return ret;
5238}
5239
5240static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5241{
5242 struct rpc_task *task;
5243 int ret;
5244
5245 task = _nfs41_proc_sequence(clp, cred);
5246 if (IS_ERR(task)) {
5247 ret = PTR_ERR(task);
5248 goto out;
5249 }
5250 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5251 if (!ret) {
5252 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5253
5254 if (task->tk_status == 0)
5255 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5256 ret = task->tk_status;
b4410c2f 5257 }
71ac6da9
TM		 5258 rpc_put_task(task);
5259out:
5260 dprintk("<-- %s status=%d\n", __func__, ret);
5261 return ret;
fc01cea9
AA		 5262}
5263
fce5c838
RL		 5264struct nfs4_reclaim_complete_data {
5265 struct nfs_client *clp;
5266 struct nfs41_reclaim_complete_args arg;
5267 struct nfs41_reclaim_complete_res res;
5268};
5269
5270static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5271{
5272 struct nfs4_reclaim_complete_data *calldata = data;
5273
b257957e 5274 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5275 if (nfs41_setup_sequence(calldata->clp->cl_session,
5276 &calldata->arg.seq_args,
fce5c838
RL		 5277 &calldata->res.seq_res, 0, task))
5278 return;
5279
5280 rpc_call_start(task);
5281}
5282
aa5190d0
TM		 5283static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5284{
5285 switch(task->tk_status) {
5286 case 0:
5287 case -NFS4ERR_COMPLETE_ALREADY:
5288 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5289 break;
5290 case -NFS4ERR_DELAY:
aa5190d0
TM		 5291 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5292 return -EAGAIN;
5293 default:
0400a6b0 5294 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5295 }
5296 return 0;
5297}
5298
fce5c838
RL		 5299static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5300{
5301 struct nfs4_reclaim_complete_data *calldata = data;
5302 struct nfs_client *clp = calldata->clp;
5303 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5304
5305 dprintk("--> %s\n", __func__);
14516c3a
TM		 5306 if (!nfs41_sequence_done(task, res))
5307 return;
fce5c838 5308
aa5190d0
TM		 5309 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5310 rpc_restart_call_prepare(task);
5311 return;
5312 }
fce5c838
RL		 5313 dprintk("<-- %s\n", __func__);
5314}
5315
5316static void nfs4_free_reclaim_complete_data(void *data)
5317{
5318 struct nfs4_reclaim_complete_data *calldata = data;
5319
5320 kfree(calldata);
5321}
5322
5323static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5324 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5325 .rpc_call_done = nfs4_reclaim_complete_done,
5326 .rpc_release = nfs4_free_reclaim_complete_data,
5327};
5328
5329/*
5330 * Issue a global reclaim complete.
5331 */
5332static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5333{
5334 struct nfs4_reclaim_complete_data *calldata;
5335 struct rpc_task *task;
5336 struct rpc_message msg = {
5337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5338 };
5339 struct rpc_task_setup task_setup_data = {
5340 .rpc_client = clp->cl_rpcclient,
5341 .rpc_message = &msg,
5342 .callback_ops = &nfs4_reclaim_complete_call_ops,
5343 .flags = RPC_TASK_ASYNC,
5344 };
5345 int status = -ENOMEM;
5346
5347 dprintk("--> %s\n", __func__);
8535b2be 5348 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5349 if (calldata == NULL)
5350 goto out;
5351 calldata->clp = clp;
5352 calldata->arg.one_fs = 0;
fce5c838
RL		 5353
5354 msg.rpc_argp = &calldata->arg;
5355 msg.rpc_resp = &calldata->res;
5356 task_setup_data.callback_data = calldata;
5357 task = rpc_run_task(&task_setup_data);
acf82b85 5358 if (IS_ERR(task)) {
fce5c838 5359 status = PTR_ERR(task);
acf82b85
DC		 5360 goto out;
5361 }
c34c32ea
AA		 5362 status = nfs4_wait_for_completion_rpc_task(task);
5363 if (status == 0)
5364 status = task->tk_status;
fce5c838 5365 rpc_put_task(task);
acf82b85 5366 return 0;
fce5c838
RL		 5367out:
5368 dprintk("<-- %s status=%d\n", __func__, status);
5369 return status;
5370}
b1f69b75
AA		 5371
5372static void
5373nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5374{
5375 struct nfs4_layoutget *lgp = calldata;
c31663d4 5376 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5377
5378 dprintk("--> %s\n", __func__);
c31663d4
FI		 5379 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5380 * right now covering the LAYOUTGET we are about to send.
5381 * However, that is not so catastrophic, and there seems
5382 * to be no way to prevent it completely.
5383 */
b1f69b75
AA		 5384 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5385 &lgp->res.seq_res, 0, task))
5386 return;
cf7d63f1
FI		 5387 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5388 NFS_I(lgp->args.inode)->layout,
5389 lgp->args.ctx->state)) {
5390 rpc_exit(task, NFS4_OK);
5391 return;
5392 }
b1f69b75
AA		 5393 rpc_call_start(task);
5394}
5395
5396static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5397{
5398 struct nfs4_layoutget *lgp = calldata;
5399 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5400
5401 dprintk("--> %s\n", __func__);
5402
5403 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5404 return;
5405
5406 switch (task->tk_status) {
5407 case 0:
5408 break;
5409 case -NFS4ERR_LAYOUTTRYLATER:
5410 case -NFS4ERR_RECALLCONFLICT:
5411 task->tk_status = -NFS4ERR_DELAY;
5412 /* Fall through */
5413 default:
5414 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5415 rpc_restart_call_prepare(task);
5416 return;
5417 }
5418 }
b1f69b75
AA		 5419 dprintk("<-- %s\n", __func__);
5420}
5421
5422static void nfs4_layoutget_release(void *calldata)
5423{
5424 struct nfs4_layoutget *lgp = calldata;
5425
5426 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5427 if (lgp->res.layout.buf != NULL)
5428 free_page((unsigned long) lgp->res.layout.buf);
5429 put_nfs_open_context(lgp->args.ctx);
5430 kfree(calldata);
5431 dprintk("<-- %s\n", __func__);
5432}
5433
5434static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5435 .rpc_call_prepare = nfs4_layoutget_prepare,
5436 .rpc_call_done = nfs4_layoutget_done,
5437 .rpc_release = nfs4_layoutget_release,
5438};
5439
5440int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5441{
5442 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5443 struct rpc_task *task;
5444 struct rpc_message msg = {
5445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5446 .rpc_argp = &lgp->args,
5447 .rpc_resp = &lgp->res,
5448 };
5449 struct rpc_task_setup task_setup_data = {
5450 .rpc_client = server->client,
5451 .rpc_message = &msg,
5452 .callback_ops = &nfs4_layoutget_call_ops,
5453 .callback_data = lgp,
5454 .flags = RPC_TASK_ASYNC,
5455 };
5456 int status = 0;
5457
5458 dprintk("--> %s\n", __func__);
5459
5460 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5461 if (lgp->res.layout.buf == NULL) {
5462 nfs4_layoutget_release(lgp);
5463 return -ENOMEM;
5464 }
5465
5466 lgp->res.seq_res.sr_slot = NULL;
5467 task = rpc_run_task(&task_setup_data);
5468 if (IS_ERR(task))
5469 return PTR_ERR(task);
5470 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5471 if (status == 0)
5472 status = task->tk_status;
5473 if (status == 0)
5474 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5475 rpc_put_task(task);
5476 dprintk("<-- %s status=%d\n", __func__, status);
5477 return status;
5478}
5479
5480static int
5481_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5482{
5483 struct nfs4_getdeviceinfo_args args = {
5484 .pdev = pdev,
5485 };
5486 struct nfs4_getdeviceinfo_res res = {
5487 .pdev = pdev,
5488 };
5489 struct rpc_message msg = {
5490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5491 .rpc_argp = &args,
5492 .rpc_resp = &res,
5493 };
5494 int status;
5495
5496 dprintk("--> %s\n", __func__);
5497 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5498 dprintk("<-- %s status=%d\n", __func__, status);
5499
5500 return status;
5501}
5502
5503int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5504{
5505 struct nfs4_exception exception = { };
5506 int err;
5507
5508 do {
5509 err = nfs4_handle_exception(server,
5510 _nfs4_proc_getdeviceinfo(server, pdev),
5511 &exception);
5512 } while (exception.retry);
5513 return err;
5514}
5515EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5516
557134a3
AA		 5517#endif /* CONFIG_NFS_V4_1 */
5518
591d71cb 5519struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5520 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5521 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5522 .recover_open = nfs4_open_reclaim,
5523 .recover_lock = nfs4_lock_reclaim,
591d71cb 5524 .establish_clid = nfs4_init_clientid,
90a16617 5525 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5526};
5527
591d71cb
AA		 5528#if defined(CONFIG_NFS_V4_1)
5529struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5530 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5531 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5532 .recover_open = nfs4_open_reclaim,
5533 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5534 .establish_clid = nfs41_init_clientid,
b4b82607 5535 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5536 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5537};
5538#endif /* CONFIG_NFS_V4_1 */
5539
5540struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5541 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5542 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5543 .recover_open = nfs4_open_expired,
5544 .recover_lock = nfs4_lock_expired,
5545 .establish_clid = nfs4_init_clientid,
90a16617 5546 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5547};
5548
5549#if defined(CONFIG_NFS_V4_1)
5550struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5551 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5552 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5553 .recover_open = nfs4_open_expired,
5554 .recover_lock = nfs4_lock_expired,
4d643d1d 5555 .establish_clid = nfs41_init_clientid,
b4b82607 5556 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5557};
591d71cb 5558#endif /* CONFIG_NFS_V4_1 */
1da177e4 5559
29fba38b
BH		 5560struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5561 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5562 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5563 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5564};
5565
5566#if defined(CONFIG_NFS_V4_1)
5567struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5568 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5569 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5570 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5571};
5572#endif
5573
97dc1359
TM		 5574static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5575 .minor_version = 0,
5576 .call_sync = _nfs4_call_sync,
e047a10c 5577 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5578 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5579 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5580 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5581};
5582
5583#if defined(CONFIG_NFS_V4_1)
5584static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5585 .minor_version = 1,
5586 .call_sync = _nfs4_call_sync_session,
e047a10c 5587 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5588 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5589 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5590 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5591};
5592#endif
5593
97dc1359
TM		 5594const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5595 [0] = &nfs_v4_0_minor_ops,
5596#if defined(CONFIG_NFS_V4_1)
5597 [1] = &nfs_v4_1_minor_ops,
5598#endif
5599};
5600
92e1d5be 5601static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5602 .permission = nfs_permission,
5603 .getattr = nfs_getattr,
5604 .setattr = nfs_setattr,
64c2ce8b
AK		 5605 .getxattr = generic_getxattr,
5606 .setxattr = generic_setxattr,
5607 .listxattr = generic_listxattr,
5608 .removexattr = generic_removexattr,
6b3b5496
BF		 5609};
5610
509de811 5611const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5612 .version = 4, /* protocol version */
5613 .dentry_ops = &nfs4_dentry_operations,
5614 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5615 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5616 .getroot = nfs4_proc_get_root,
5617 .getattr = nfs4_proc_getattr,
5618 .setattr = nfs4_proc_setattr,
2b3de441 5619 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5620 .lookup = nfs4_proc_lookup,
5621 .access = nfs4_proc_access,
5622 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5623 .create = nfs4_proc_create,
5624 .remove = nfs4_proc_remove,
5625 .unlink_setup = nfs4_proc_unlink_setup,
5626 .unlink_done = nfs4_proc_unlink_done,
5627 .rename = nfs4_proc_rename,
d3d4152a
JL		 5628 .rename_setup = nfs4_proc_rename_setup,
5629 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5630 .link = nfs4_proc_link,
5631 .symlink = nfs4_proc_symlink,
5632 .mkdir = nfs4_proc_mkdir,
5633 .rmdir = nfs4_proc_remove,
5634 .readdir = nfs4_proc_readdir,
5635 .mknod = nfs4_proc_mknod,
5636 .statfs = nfs4_proc_statfs,
5637 .fsinfo = nfs4_proc_fsinfo,
5638 .pathconf = nfs4_proc_pathconf,
e9326dca 5639 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5640 .decode_dirent = nfs4_decode_dirent,
5641 .read_setup = nfs4_proc_read_setup,
ec06c096 5642 .read_done = nfs4_read_done,
1da177e4 5643 .write_setup = nfs4_proc_write_setup,
788e7a89 5644 .write_done = nfs4_write_done,
1da177e4 5645 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5646 .commit_done = nfs4_commit_done,
1da177e4 5647 .lock = nfs4_proc_lock,
e50a1c2e 5648 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5649 .close_context = nfs4_close_context,
2b484297 5650 .open_context = nfs4_atomic_open,
1da177e4
LT		 5651};
5652
64c2ce8b
AK		 5653static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5654 .prefix = XATTR_NAME_NFSV4_ACL,
5655 .list = nfs4_xattr_list_nfs4_acl,
5656 .get = nfs4_xattr_get_nfs4_acl,
5657 .set = nfs4_xattr_set_nfs4_acl,
5658};
5659
5660const struct xattr_handler *nfs4_xattr_handlers[] = {
5661 &nfs4_xattr_nfs4_acl_handler,
5662 NULL
5663};
5664
1da177e4
LT		 5665/*
5666 * Local variables:
5667 * c-basic-offset: 8
5668 * End:
5669 */
Linux 6.x block layer and io_uring tree(s)