projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1: Don't update sequence number if rpc_task is not sent
[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 43#include <linux/sunrpc/clnt.h>
8f70e95f 44#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
9b7160c5 49#include <linux/nfs_mount.h>
1da177e4 50#include <linux/namei.h>
02a913a7 51#include <linux/mount.h>
99fe60d0 52#include <linux/module.h>
5a0ffe54 53#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
1da177e4 56
4ce79717 57#include "nfs4_fs.h"
1da177e4 58#include "delegation.h"
101070ca 59#include "internal.h"
006ea73e 60#include "iostat.h"
fc931582 61#include "callback.h"
b1f69b75 62#include "pnfs.h"
1da177e4
LT		 63
64#define NFSDBG_FACILITY NFSDBG_PROC
65
2066fe89 66#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 67#define NFS4_POLL_RETRY_MAX (15*HZ)
68
a78cb57a
TM		 69#define NFS4_MAX_LOOP_ON_RECOVER (10)
70
cdd4e68b 71struct nfs4_opendata;
864472e9 72static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 73static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 74static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 75static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
7c513058
BS		 76static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
77 const struct qstr *name, struct nfs_fh *fhandle,
78 struct nfs_fattr *fattr);
9936781d 79static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 80static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
1da177e4 83
1da177e4 84/* Prevent leaks of NFSv4 errors into userland */
46f72f57 85static int nfs4_map_errors(int err)
1da177e4 86{
52567b03
TM		 87 if (err >= -1000)
88 return err;
89 switch (err) {
90 case -NFS4ERR_RESOURCE:
91 return -EREMOTEIO;
7ebb9315
BS		 92 case -NFS4ERR_WRONGSEC:
93 return -EPERM;
3ddeb7c5
TM		 94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
96 return -EINVAL;
52567b03 97 default:
1da177e4 98 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 99 __func__, -err);
52567b03 100 break;
1da177e4 101 }
52567b03 102 return -EIO;
1da177e4
LT		 103}
104
105/*
106 * This is our standard bitmap for GETATTR requests.
107 */
108const u32 nfs4_fattr_bitmap[2] = {
109 FATTR4_WORD0_TYPE
110 | FATTR4_WORD0_CHANGE
111 | FATTR4_WORD0_SIZE
112 | FATTR4_WORD0_FSID
113 | FATTR4_WORD0_FILEID,
114 FATTR4_WORD1_MODE
115 | FATTR4_WORD1_NUMLINKS
116 | FATTR4_WORD1_OWNER
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
123};
124
125const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
132};
133
4ce79717 134const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 135 FATTR4_WORD0_MAXLINK
136 | FATTR4_WORD0_MAXNAME,
137 0
138};
139
140const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
55b6e774 144 FATTR4_WORD1_TIME_DELTA
504913fb 145 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 146};
147
830b8e33
MN		 148const u32 nfs4_fs_locations_bitmap[2] = {
149 FATTR4_WORD0_TYPE
150 | FATTR4_WORD0_CHANGE
151 | FATTR4_WORD0_SIZE
152 | FATTR4_WORD0_FSID
153 | FATTR4_WORD0_FILEID
154 | FATTR4_WORD0_FS_LOCATIONS,
155 FATTR4_WORD1_MODE
156 | FATTR4_WORD1_NUMLINKS
157 | FATTR4_WORD1_OWNER
158 | FATTR4_WORD1_OWNER_GROUP
159 | FATTR4_WORD1_RAWDEV
160 | FATTR4_WORD1_SPACE_USED
161 | FATTR4_WORD1_TIME_ACCESS
162 | FATTR4_WORD1_TIME_METADATA
163 | FATTR4_WORD1_TIME_MODIFY
164 | FATTR4_WORD1_MOUNTED_ON_FILEID
165};
166
bc4785cd 167static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 168 struct nfs4_readdir_arg *readdir)
169{
0dbb4c67 170 __be32 *start, *p;
1da177e4
LT		 171
172 BUG_ON(readdir->count < 80);
173 if (cookie > 2) {
b7ef1956 174 readdir->cookie = cookie;
1da177e4
LT		 175 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
176 return;
177 }
178
179 readdir->cookie = 0;
180 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
181 if (cookie == 2)
182 return;
183
184 /*
185 * NFSv4 servers do not return entries for '.' and '..'
186 * Therefore, we fake these entries here. We let '.'
187 * have cookie 0 and '..' have cookie 1. Note that
188 * when talking to the server, we always send cookie 0
189 * instead of 1 or 2.
190 */
0dbb4c67 191 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 192
193 if (cookie == 0) {
194 *p++ = xdr_one; /* next */
195 *p++ = xdr_zero; /* cookie, first word */
196 *p++ = xdr_one; /* cookie, second word */
197 *p++ = xdr_one; /* entry len */
198 memcpy(p, ".\0\0\0", 4); /* entry */
199 p++;
200 *p++ = xdr_one; /* bitmap length */
201 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
202 *p++ = htonl(8); /* attribute buffer length */
4e769b93 203 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 204 }
205
206 *p++ = xdr_one; /* next */
207 *p++ = xdr_zero; /* cookie, first word */
208 *p++ = xdr_two; /* cookie, second word */
209 *p++ = xdr_two; /* entry len */
210 memcpy(p, "..\0\0", 4); /* entry */
211 p++;
212 *p++ = xdr_one; /* bitmap length */
213 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
214 *p++ = htonl(8); /* attribute buffer length */
4e769b93 215 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 216
217 readdir->pgbase = (char *)p - (char *)start;
218 readdir->count -= readdir->pgbase;
219 kunmap_atomic(start, KM_USER0);
220}
221
65de872e
TM		 222static int nfs4_wait_clnt_recover(struct nfs_client *clp)
223{
224 int res;
225
226 might_sleep();
227
e005e804 228 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 229 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 230 return res;
231}
232
233static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
234{
235 int res = 0;
236
237 might_sleep();
238
239 if (*timeout <= 0)
240 *timeout = NFS4_POLL_RETRY_MIN;
241 if (*timeout > NFS4_POLL_RETRY_MAX)
242 *timeout = NFS4_POLL_RETRY_MAX;
243 schedule_timeout_killable(*timeout);
244 if (fatal_signal_pending(current))
245 res = -ERESTARTSYS;
246 *timeout <<= 1;
247 return res;
248}
249
250/* This is the error handling routine for processes that are allowed
251 * to sleep.
252 */
b064eca2 253static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 254{
255 struct nfs_client *clp = server->nfs_client;
9e33bed5 256 struct nfs4_state *state = exception->state;
65de872e
TM		 257 int ret = errorcode;
258
259 exception->retry = 0;
260 switch(errorcode) {
261 case 0:
262 return 0;
9e33bed5
TM		 263 case -NFS4ERR_ADMIN_REVOKED:
264 case -NFS4ERR_BAD_STATEID:
265 case -NFS4ERR_OPENMODE:
266 if (state == NULL)
267 break;
0400a6b0
TM		 268 nfs4_schedule_stateid_recovery(server, state);
269 goto wait_on_recovery;
65de872e 270 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 271 case -NFS4ERR_STALE_CLIENTID:
65de872e 272 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 273 nfs4_schedule_lease_recovery(clp);
274 goto wait_on_recovery;
03391693 275#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 276 case -NFS4ERR_BADSESSION:
277 case -NFS4ERR_BADSLOT:
278 case -NFS4ERR_BAD_HIGH_SLOT:
279 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
280 case -NFS4ERR_DEADSESSION:
281 case -NFS4ERR_SEQ_FALSE_RETRY:
282 case -NFS4ERR_SEQ_MISORDERED:
283 dprintk("%s ERROR: %d Reset session\n", __func__,
284 errorcode);
0400a6b0 285 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 286 exception->retry = 1;
b9179237 287 break;
03391693 288#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 289 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 290 if (exception->timeout > HZ) {
291 /* We have retried a decent amount, time to
292 * fail
293 */
294 ret = -EBUSY;
295 break;
296 }
65de872e
TM		 297 case -NFS4ERR_GRACE:
298 case -NFS4ERR_DELAY:
2c643488 299 case -EKEYEXPIRED:
65de872e
TM		 300 ret = nfs4_delay(server->client, &exception->timeout);
301 if (ret != 0)
302 break;
303 case -NFS4ERR_OLD_STATEID:
304 exception->retry = 1;
b064eca2
TM		 305 break;
306 case -NFS4ERR_BADOWNER:
307 /* The following works around a Linux server bug! */
308 case -NFS4ERR_BADNAME:
309 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
310 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
311 exception->retry = 1;
312 printk(KERN_WARNING "NFS: v4 server %s "
313 "does not accept raw "
314 "uid/gids. "
315 "Reenabling the idmapper.\n",
316 server->nfs_client->cl_hostname);
317 }
65de872e
TM		 318 }
319 /* We failed to handle the error */
320 return nfs4_map_errors(ret);
0400a6b0 321wait_on_recovery:
a2c0b9e2
TM		 322 ret = nfs4_wait_clnt_recover(clp);
323 if (ret == 0)
324 exception->retry = 1;
325 return ret;
65de872e
TM		 326}
327
328
452e9352 329static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 330{
1da177e4
LT		 331 spin_lock(&clp->cl_lock);
332 if (time_before(clp->cl_last_renewal,timestamp))
333 clp->cl_last_renewal = timestamp;
334 spin_unlock(&clp->cl_lock);
335}
336
452e9352
TM		 337static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
338{
339 do_renew_lease(server->nfs_client, timestamp);
340}
341
cccef3b9
AA		 342#if defined(CONFIG_NFS_V4_1)
343
e2c4ab3c
AA		 344/*
345 * nfs4_free_slot - free a slot and efficiently update slot table.
346 *
347 * freeing a slot is trivially done by clearing its respective bit
348 * in the bitmap.
349 * If the freed slotid equals highest_used_slotid we want to update it
350 * so that the server would be able to size down the slot table if needed,
351 * otherwise we know that the highest_used_slotid is still in use.
352 * When updating highest_used_slotid there may be "holes" in the bitmap
353 * so we need to scan down from highest_used_slotid to 0 looking for the now
354 * highest slotid in use.
355 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 356 *
357 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 358 */
359static void
dfb4f309 360nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 361{
dfb4f309 362 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 363 int slotid = free_slotid;
364
dfb4f309 365 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 366 /* clear used bit in bitmap */
367 __clear_bit(slotid, tbl->used_slots);
368
369 /* update highest_used_slotid when it is freed */
370 if (slotid == tbl->highest_used_slotid) {
371 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 372 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 373 tbl->highest_used_slotid = slotid;
374 else
375 tbl->highest_used_slotid = -1;
376 }
e2c4ab3c
AA		 377 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
378 free_slotid, tbl->highest_used_slotid);
379}
380
3bfb0fc5 381/*
42acd021 382 * Signal state manager thread if session fore channel is drained
3bfb0fc5 383 */
42acd021 384static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 385{
689cf5c1
AB		 386 struct rpc_task *task;
387
a2118c33 388 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 389 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
390 if (task)
391 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 392 return;
393 }
394
395 if (ses->fc_slot_table.highest_used_slotid != -1)
396 return;
397
42acd021
AA		 398 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
399 complete(&ses->fc_slot_table.complete);
400}
401
402/*
403 * Signal state manager thread if session back channel is drained
404 */
405void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
406{
407 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
408 ses->bc_slot_table.highest_used_slotid != -1)
409 return;
410 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
411 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 412}
413
d185a334 414static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 415{
416 struct nfs4_slot_table *tbl;
417
d185a334 418 tbl = &res->sr_session->fc_slot_table;
dfb4f309 419 if (!res->sr_slot) {
13615871
AA		 420 /* just wake up the next guy waiting since
421 * we may have not consumed a slot after all */
691daf3b 422 dprintk("%s: No slot\n", __func__);
35dc1d74 423 return;
13615871 424 }
ea028ac9 425
35dc1d74 426 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 427 nfs4_free_slot(tbl, res->sr_slot);
42acd021 428 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 429 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 430 res->sr_slot = NULL;
13615871
AA		 431}
432
14516c3a 433static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 434{
435 unsigned long timestamp;
14516c3a 436 struct nfs_client *clp;
b0df806c
AA		 437
438 /*
439 * sr_status remains 1 if an RPC level error occurred. The server
440 * may or may not have processed the sequence operation..
441 * Proceed as if the server received and processed the sequence
442 * operation.
443 */
444 if (res->sr_status == 1)
445 res->sr_status = NFS_OK;
446
468f8613
BS		 447 /* don't increment the sequence number if the task wasn't sent */
448 if (!RPC_WAS_SENT(task))
b0df806c
AA		 449 goto out;
450
691daf3b 451 /* Check the SEQUENCE operation status */
14516c3a
TM		 452 switch (res->sr_status) {
453 case 0:
b0df806c 454 /* Update the slot's sequence and clientid lease timer */
dfb4f309 455 ++res->sr_slot->seq_nr;
b0df806c 456 timestamp = res->sr_renewal_time;
14516c3a 457 clp = res->sr_session->clp;
452e9352 458 do_renew_lease(clp, timestamp);
0629e370 459 /* Check sequence flags */
b4410c2f
TM		 460 if (res->sr_status_flags != 0)
461 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 462 break;
463 case -NFS4ERR_DELAY:
464 /* The server detected a resend of the RPC call and
465 * returned NFS4ERR_DELAY as per Section 2.10.6.2
466 * of RFC5661.
467 */
12364a4f 468 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 469 __func__,
470 res->sr_slot - res->sr_session->fc_slot_table.slots,
471 res->sr_slot->seq_nr);
14516c3a
TM		 472 goto out_retry;
473 default:
474 /* Just update the slot sequence no. */
dfb4f309 475 ++res->sr_slot->seq_nr;
b0df806c
AA		 476 }
477out:
478 /* The session may be reset by one of the error handlers. */
479 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 480 nfs41_sequence_free_slot(res);
14516c3a
TM		 481 return 1;
482out_retry:
d05dd4e9 483 if (!rpc_restart_call(task))
14516c3a
TM		 484 goto out;
485 rpc_delay(task, NFS4_POLL_RETRY_MAX);
486 return 0;
b0df806c
AA		 487}
488
14516c3a
TM		 489static int nfs4_sequence_done(struct rpc_task *task,
490 struct nfs4_sequence_res *res)
df896455 491{
14516c3a
TM		 492 if (res->sr_session == NULL)
493 return 1;
494 return nfs41_sequence_done(task, res);
df896455
TM		 495}
496
510b8175
BH		 497/*
498 * nfs4_find_slot - efficiently look for a free slot
499 *
500 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
501 * If found, we mark the slot as used, update the highest_used_slotid,
502 * and respectively set up the sequence operation args.
503 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 504 *
505 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 506 */
507static u8
40ead580 508nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 509{
510 int slotid;
511 u8 ret_id = NFS4_MAX_SLOT_TABLE;
512 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
513
510b8175
BH		 514 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
515 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
516 tbl->max_slots);
517 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
518 if (slotid >= tbl->max_slots)
519 goto out;
520 __set_bit(slotid, tbl->used_slots);
521 if (slotid > tbl->highest_used_slotid)
522 tbl->highest_used_slotid = slotid;
523 ret_id = slotid;
524out:
525 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
526 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 527 return ret_id;
528}
529
dc70d7b3 530int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 531 struct nfs4_sequence_args *args,
532 struct nfs4_sequence_res *res,
533 int cache_reply,
534 struct rpc_task *task)
535{
fbcd4abc
AA		 536 struct nfs4_slot *slot;
537 struct nfs4_slot_table *tbl;
538 u8 slotid;
539
540 dprintk("--> %s\n", __func__);
ce5039c1 541 /* slot already allocated? */
dfb4f309 542 if (res->sr_slot != NULL)
ce5039c1
AA		 543 return 0;
544
fbcd4abc
AA		 545 tbl = &session->fc_slot_table;
546
547 spin_lock(&tbl->slot_tbl_lock);
a2118c33 548 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 549 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 550 /*
551 * The state manager will wait until the slot table is empty.
552 * Schedule the reset thread
553 */
05f0d236 554 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 555 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 556 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 557 return -EAGAIN;
b069d94a
AA		 558 }
559
689cf5c1
AB		 560 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
561 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
562 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
563 spin_unlock(&tbl->slot_tbl_lock);
564 dprintk("%s enforce FIFO order\n", __func__);
565 return -EAGAIN;
566 }
567
40ead580 568 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 569 if (slotid == NFS4_MAX_SLOT_TABLE) {
570 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
571 spin_unlock(&tbl->slot_tbl_lock);
572 dprintk("<-- %s: no free slots\n", __func__);
573 return -EAGAIN;
574 }
575 spin_unlock(&tbl->slot_tbl_lock);
576
689cf5c1 577 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 578 slot = tbl->slots + slotid;
99fe60d0 579 args->sa_session = session;
fbcd4abc
AA		 580 args->sa_slotid = slotid;
581 args->sa_cache_this = cache_reply;
582
583 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
584
99fe60d0 585 res->sr_session = session;
dfb4f309 586 res->sr_slot = slot;
fbcd4abc 587 res->sr_renewal_time = jiffies;
2a6e26cd 588 res->sr_status_flags = 0;
fbcd4abc
AA		 589 /*
590 * sr_status is only set in decode_sequence, and so will remain
591 * set to 1 if an rpc level failure occurs.
592 */
593 res->sr_status = 1;
ce5039c1
AA		 594 return 0;
595}
dc70d7b3 596EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 597
035168ab 598int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
601 int cache_reply,
602 struct rpc_task *task)
603{
035168ab 604 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 605 int ret = 0;
606
035168ab
TM		 607 if (session == NULL) {
608 args->sa_session = NULL;
609 res->sr_session = NULL;
610 goto out;
611 }
612
12364a4f 613 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 614 __func__, session->clp, session, res->sr_slot ?
615 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 616
035168ab 617 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 618 task);
ce5039c1
AA		 619out:
620 dprintk("<-- %s status=%d\n", __func__, ret);
621 return ret;
622}
623
624struct nfs41_call_sync_data {
035168ab 625 const struct nfs_server *seq_server;
ce5039c1
AA		 626 struct nfs4_sequence_args *seq_args;
627 struct nfs4_sequence_res *seq_res;
628 int cache_reply;
629};
630
631static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
632{
633 struct nfs41_call_sync_data *data = calldata;
634
035168ab
TM		 635 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
636
637 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 638 data->seq_res, data->cache_reply, task))
639 return;
640 rpc_call_start(task);
641}
642
b257957e
AB		 643static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
644{
645 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
646 nfs41_call_sync_prepare(task, calldata);
647}
648
69ab40c4
AA		 649static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
650{
651 struct nfs41_call_sync_data *data = calldata;
652
14516c3a 653 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 654}
655
ce5039c1
AA		 656struct rpc_call_ops nfs41_call_sync_ops = {
657 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 658 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 659};
660
b257957e
AB		 661struct rpc_call_ops nfs41_call_priv_sync_ops = {
662 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
663 .rpc_call_done = nfs41_call_sync_done,
664};
665
7c513058
BS		 666static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
667 struct nfs_server *server,
ce5039c1
AA		 668 struct rpc_message *msg,
669 struct nfs4_sequence_args *args,
670 struct nfs4_sequence_res *res,
b257957e
AB		 671 int cache_reply,
672 int privileged)
ce5039c1
AA		 673{
674 int ret;
675 struct rpc_task *task;
676 struct nfs41_call_sync_data data = {
035168ab 677 .seq_server = server,
ce5039c1
AA		 678 .seq_args = args,
679 .seq_res = res,
680 .cache_reply = cache_reply,
681 };
682 struct rpc_task_setup task_setup = {
7c513058 683 .rpc_client = clnt,
ce5039c1
AA		 684 .rpc_message = msg,
685 .callback_ops = &nfs41_call_sync_ops,
686 .callback_data = &data
687 };
688
dfb4f309 689 res->sr_slot = NULL;
b257957e
AB		 690 if (privileged)
691 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 692 task = rpc_run_task(&task_setup);
693 if (IS_ERR(task))
694 ret = PTR_ERR(task);
695 else {
696 ret = task->tk_status;
697 rpc_put_task(task);
698 }
699 return ret;
700}
701
7c513058
BS		 702int _nfs4_call_sync_session(struct rpc_clnt *clnt,
703 struct nfs_server *server,
cccef3b9
AA		 704 struct rpc_message *msg,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 int cache_reply)
708{
7c513058 709 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 710}
711
df896455 712#else
14516c3a
TM		 713static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
df896455 715{
14516c3a 716 return 1;
df896455 717}
cccef3b9
AA		 718#endif /* CONFIG_NFS_V4_1 */
719
7c513058
BS		 720int _nfs4_call_sync(struct rpc_clnt *clnt,
721 struct nfs_server *server,
cccef3b9
AA		 722 struct rpc_message *msg,
723 struct nfs4_sequence_args *args,
724 struct nfs4_sequence_res *res,
725 int cache_reply)
726{
f3752975 727 args->sa_session = res->sr_session = NULL;
7c513058 728 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 729}
730
e73b83f2 731static inline
7c513058
BS		 732int nfs4_call_sync(struct rpc_clnt *clnt,
733 struct nfs_server *server,
e73b83f2
BS		 734 struct rpc_message *msg,
735 struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res,
737 int cache_reply)
738{
7c513058
BS		 739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
740 args, res, cache_reply);
e73b83f2 741}
cccef3b9 742
38478b24 743static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 744{
38478b24 745 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 746
38478b24 747 spin_lock(&dir->i_lock);
40d24704
TM		 748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
749 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 750 nfs_force_lookup_revalidate(dir);
40d24704 751 nfsi->change_attr = cinfo->after;
38478b24 752 spin_unlock(&dir->i_lock);
1da177e4
LT		 753}
754
e56e0b78 755struct nfs4_opendata {
c6d00e63 756 struct kref kref;
e56e0b78
TM		 757 struct nfs_openargs o_arg;
758 struct nfs_openres o_res;
cdd4e68b
TM		 759 struct nfs_open_confirmargs c_arg;
760 struct nfs_open_confirmres c_res;
e56e0b78
TM		 761 struct nfs_fattr f_attr;
762 struct nfs_fattr dir_attr;
ad389da7 763 struct path path;
e56e0b78
TM		 764 struct dentry *dir;
765 struct nfs4_state_owner *owner;
aac00a8d 766 struct nfs4_state *state;
e56e0b78 767 struct iattr attrs;
26e976a8 768 unsigned long timestamp;
3e309914 769 unsigned int rpc_done : 1;
24ac23ab
TM		 770 int rpc_status;
771 int cancelled;
e56e0b78
TM		 772};
773
2ced46c2
TM		 774
775static void nfs4_init_opendata_res(struct nfs4_opendata *p)
776{
777 p->o_res.f_attr = &p->f_attr;
778 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 779 p->o_res.seqid = p->o_arg.seqid;
780 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 781 p->o_res.server = p->o_arg.server;
782 nfs_fattr_init(&p->f_attr);
783 nfs_fattr_init(&p->dir_attr);
784}
785
ad389da7 786static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 787 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 788 const struct iattr *attrs,
789 gfp_t gfp_mask)
e56e0b78 790{
ad389da7 791 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 792 struct inode *dir = parent->d_inode;
793 struct nfs_server *server = NFS_SERVER(dir);
794 struct nfs4_opendata *p;
795
8535b2be 796 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 797 if (p == NULL)
798 goto err;
8535b2be 799 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 800 if (p->o_arg.seqid == NULL)
801 goto err_free;
f6948697
AV		 802 path_get(path);
803 p->path = *path;
e56e0b78
TM		 804 p->dir = parent;
805 p->owner = sp;
806 atomic_inc(&sp->so_count);
807 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 808 p->o_arg.open_flags = flags;
809 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 810 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 811 p->o_arg.id = sp->so_owner_id.id;
ad389da7 812 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 813 p->o_arg.server = server;
814 p->o_arg.bitmask = server->attr_bitmask;
815 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 816 if (flags & O_CREAT) {
817 u32 *s;
818
e56e0b78
TM		 819 p->o_arg.u.attrs = &p->attrs;
820 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 821 s = (u32 *) p->o_arg.u.verifier.data;
822 s[0] = jiffies;
823 s[1] = current->pid;
e56e0b78 824 }
cdd4e68b
TM		 825 p->c_arg.fh = &p->o_res.fh;
826 p->c_arg.stateid = &p->o_res.stateid;
827 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 828 nfs4_init_opendata_res(p);
c6d00e63 829 kref_init(&p->kref);
e56e0b78
TM		 830 return p;
831err_free:
832 kfree(p);
833err:
834 dput(parent);
835 return NULL;
836}
837
c6d00e63 838static void nfs4_opendata_free(struct kref *kref)
e56e0b78 839{
c6d00e63
TM		 840 struct nfs4_opendata *p = container_of(kref,
841 struct nfs4_opendata, kref);
842
843 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
c6d00e63
TM		 846 nfs4_put_state_owner(p->owner);
847 dput(p->dir);
31f31db1 848 path_put(&p->path);
c6d00e63
TM		 849 kfree(p);
850}
851
852static void nfs4_opendata_put(struct nfs4_opendata *p)
853{
854 if (p != NULL)
855 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 856}
857
06f814a3
TM		 858static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
859{
06f814a3
TM		 860 int ret;
861
06f814a3 862 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 863 return ret;
864}
865
dc0b027d 866static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 867{
868 int ret = 0;
dc0b027d
TM		 869
870 if (open_mode & O_EXCL)
871 goto out;
872 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 873 case FMODE_READ:
88069f77
TM		 874 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
875 && state->n_rdonly != 0;
6ee41268
TM		 876 break;
877 case FMODE_WRITE:
88069f77
TM		 878 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
879 && state->n_wronly != 0;
6ee41268
TM		 880 break;
881 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 882 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
883 && state->n_rdwr != 0;
6ee41268 884 }
dc0b027d 885out:
6ee41268
TM		 886 return ret;
887}
888
dc0b027d 889static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 890{
dc0b027d 891 if ((delegation->type & fmode) != fmode)
aac00a8d 892 return 0;
15c831bf 893 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 894 return 0;
b7391f44 895 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 896 return 1;
897}
898
dc0b027d 899static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 900{
dc0b027d 901 switch (fmode) {
e7616923
TM		 902 case FMODE_WRITE:
903 state->n_wronly++;
904 break;
905 case FMODE_READ:
906 state->n_rdonly++;
907 break;
908 case FMODE_READ|FMODE_WRITE:
909 state->n_rdwr++;
910 }
dc0b027d 911 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 912}
913
dc0b027d 914static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 915{
916 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
917 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
918 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 919 switch (fmode) {
003707c7
TM		 920 case FMODE_READ:
921 set_bit(NFS_O_RDONLY_STATE, &state->flags);
922 break;
923 case FMODE_WRITE:
924 set_bit(NFS_O_WRONLY_STATE, &state->flags);
925 break;
926 case FMODE_READ|FMODE_WRITE:
927 set_bit(NFS_O_RDWR_STATE, &state->flags);
928 }
e7616923
TM		 929}
930
dc0b027d 931static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 932{
8bda4e4c 933 write_seqlock(&state->seqlock);
dc0b027d 934 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 935 write_sequnlock(&state->seqlock);
003707c7
TM		 936}
937
dc0b027d 938static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 939{
8bda4e4c
TM		 940 /*
941 * Protect the call to nfs4_state_set_mode_locked and
942 * serialise the stateid update
943 */
944 write_seqlock(&state->seqlock);
003707c7
TM		 945 if (deleg_stateid != NULL) {
946 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
947 set_bit(NFS_DELEGATED_STATE, &state->flags);
948 }
949 if (open_stateid != NULL)
dc0b027d 950 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 951 write_sequnlock(&state->seqlock);
952 spin_lock(&state->owner->so_lock);
dc0b027d 953 update_open_stateflags(state, fmode);
ec073428 954 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 955}
956
dc0b027d 957static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 958{
959 struct nfs_inode *nfsi = NFS_I(state->inode);
960 struct nfs_delegation *deleg_cur;
961 int ret = 0;
962
dc0b027d 963 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 964
965 rcu_read_lock();
966 deleg_cur = rcu_dereference(nfsi->delegation);
967 if (deleg_cur == NULL)
968 goto no_delegation;
969
970 spin_lock(&deleg_cur->lock);
971 if (nfsi->delegation != deleg_cur ||
dc0b027d 972 (deleg_cur->type & fmode) != fmode)
34310430
TM		 973 goto no_delegation_unlock;
974
975 if (delegation == NULL)
976 delegation = &deleg_cur->stateid;
977 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
978 goto no_delegation_unlock;
979
b7391f44 980 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 981 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 982 ret = 1;
983no_delegation_unlock:
984 spin_unlock(&deleg_cur->lock);
985no_delegation:
986 rcu_read_unlock();
987
988 if (!ret && open_stateid != NULL) {
dc0b027d 989 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 990 ret = 1;
991 }
992
993 return ret;
994}
995
996
dc0b027d 997static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 998{
999 struct nfs_delegation *delegation;
1000
1001 rcu_read_lock();
1002 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1003 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1004 rcu_read_unlock();
1005 return;
1006 }
1007 rcu_read_unlock();
1008 nfs_inode_return_delegation(inode);
1009}
1010
6ee41268 1011static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1012{
1013 struct nfs4_state *state = opendata->state;
1014 struct nfs_inode *nfsi = NFS_I(state->inode);
1015 struct nfs_delegation *delegation;
dc0b027d
TM		 1016 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1017 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1018 nfs4_stateid stateid;
1019 int ret = -EAGAIN;
1020
aac00a8d 1021 for (;;) {
dc0b027d 1022 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1023 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1024 if (can_open_cached(state, fmode, open_mode)) {
1025 update_open_stateflags(state, fmode);
6ee41268 1026 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1027 goto out_return_state;
1028 }
1029 spin_unlock(&state->owner->so_lock);
1030 }
34310430
TM		 1031 rcu_read_lock();
1032 delegation = rcu_dereference(nfsi->delegation);
1033 if (delegation == NULL ||
dc0b027d 1034 !can_open_delegated(delegation, fmode)) {
34310430 1035 rcu_read_unlock();
aac00a8d 1036 break;
34310430 1037 }
aac00a8d
TM		 1038 /* Save the delegation */
1039 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1040 rcu_read_unlock();
af22f94a 1041 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1042 if (ret != 0)
1043 goto out;
1044 ret = -EAGAIN;
34310430
TM		 1045
1046 /* Try to update the stateid using the delegation */
dc0b027d 1047 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1048 goto out_return_state;
aac00a8d 1049 }
aac00a8d
TM		 1050out:
1051 return ERR_PTR(ret);
1052out_return_state:
1053 atomic_inc(&state->count);
1054 return state;
1055}
1056
24ac23ab
TM		 1057static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1058{
1059 struct inode *inode;
1060 struct nfs4_state *state = NULL;
003707c7 1061 struct nfs_delegation *delegation;
1b370bc2 1062 int ret;
24ac23ab 1063
aac00a8d 1064 if (!data->rpc_done) {
6ee41268 1065 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1066 goto out;
1067 }
1068
1b370bc2 1069 ret = -EAGAIN;
24ac23ab 1070 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1071 goto err;
24ac23ab 1072 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1073 ret = PTR_ERR(inode);
03f28e3a 1074 if (IS_ERR(inode))
1b370bc2
TM		 1075 goto err;
1076 ret = -ENOMEM;
24ac23ab
TM		 1077 state = nfs4_get_open_state(inode, data->owner);
1078 if (state == NULL)
1b370bc2 1079 goto err_put_inode;
549d6ed5 1080 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1081 int delegation_flags = 0;
1082
003707c7
TM		 1083 rcu_read_lock();
1084 delegation = rcu_dereference(NFS_I(inode)->delegation);
1085 if (delegation)
1086 delegation_flags = delegation->flags;
1087 rcu_read_unlock();
15c831bf 1088 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1089 nfs_inode_set_delegation(state->inode,
1090 data->owner->so_cred,
1091 &data->o_res);
1092 else
1093 nfs_inode_reclaim_delegation(state->inode,
1094 data->owner->so_cred,
1095 &data->o_res);
1096 }
34310430
TM		 1097
1098 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1099 data->o_arg.fmode);
24ac23ab 1100 iput(inode);
aac00a8d 1101out:
24ac23ab 1102 return state;
1b370bc2
TM		 1103err_put_inode:
1104 iput(inode);
1105err:
1106 return ERR_PTR(ret);
24ac23ab
TM		 1107}
1108
864472e9
TM		 1109static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1110{
1111 struct nfs_inode *nfsi = NFS_I(state->inode);
1112 struct nfs_open_context *ctx;
1113
1114 spin_lock(&state->inode->i_lock);
1115 list_for_each_entry(ctx, &nfsi->open_files, list) {
1116 if (ctx->state != state)
1117 continue;
1118 get_nfs_open_context(ctx);
1119 spin_unlock(&state->inode->i_lock);
1120 return ctx;
1121 }
1122 spin_unlock(&state->inode->i_lock);
1123 return ERR_PTR(-ENOENT);
1124}
1125
6f220ed5
TM		 1126static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1127{
1128 struct nfs4_opendata *opendata;
1129
8535b2be 1130 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1131 if (opendata == NULL)
1132 return ERR_PTR(-ENOMEM);
1133 opendata->state = state;
1134 atomic_inc(&state->count);
1135 return opendata;
1136}
1137
dc0b027d 1138static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1139{
2ced46c2 1140 struct nfs4_state *newstate;
864472e9
TM		 1141 int ret;
1142
dc0b027d
TM		 1143 opendata->o_arg.open_flags = 0;
1144 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1145 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1146 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1147 nfs4_init_opendata_res(opendata);
b257957e 1148 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1149 if (ret != 0)
1150 return ret;
2ced46c2 1151 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1152 if (IS_ERR(newstate))
1153 return PTR_ERR(newstate);
dc0b027d 1154 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1155 *res = newstate;
864472e9
TM		 1156 return 0;
1157}
1158
1159static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1160{
864472e9 1161 struct nfs4_state *newstate;
864472e9
TM		 1162 int ret;
1163
1164 /* memory barrier prior to reading state->n_* */
2ced46c2 1165 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1166 smp_rmb();
1167 if (state->n_rdwr != 0) {
b0ed9dbc 1168 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1169 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1170 if (ret != 0)
1171 return ret;
2ced46c2
TM		 1172 if (newstate != state)
1173 return -ESTALE;
864472e9
TM		 1174 }
1175 if (state->n_wronly != 0) {
b0ed9dbc 1176 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1177 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1178 if (ret != 0)
1179 return ret;
2ced46c2
TM		 1180 if (newstate != state)
1181 return -ESTALE;
864472e9
TM		 1182 }
1183 if (state->n_rdonly != 0) {
b0ed9dbc 1184 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1185 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1186 if (ret != 0)
1187 return ret;
2ced46c2
TM		 1188 if (newstate != state)
1189 return -ESTALE;
864472e9 1190 }
1ac7e2fd
TM		 1191 /*
1192 * We may have performed cached opens for all three recoveries.
1193 * Check if we need to update the current stateid.
1194 */
1195 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1196 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1197 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1198 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1199 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1200 write_sequnlock(&state->seqlock);
1ac7e2fd 1201 }
864472e9
TM		 1202 return 0;
1203}
1204
1da177e4
LT		 1205/*
1206 * OPEN_RECLAIM:
1207 * reclaim state on the server after a reboot.
1da177e4 1208 */
539cd03a 1209static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1210{
1ac7e2fd 1211 struct nfs_delegation *delegation;
864472e9 1212 struct nfs4_opendata *opendata;
dc0b027d 1213 fmode_t delegation_type = 0;
1da177e4
LT		 1214 int status;
1215
6f220ed5
TM		 1216 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1217 if (IS_ERR(opendata))
1218 return PTR_ERR(opendata);
864472e9
TM		 1219 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1220 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1221 rcu_read_lock();
1222 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1223 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1224 delegation_type = delegation->type;
1ac7e2fd 1225 rcu_read_unlock();
864472e9
TM		 1226 opendata->o_arg.u.delegation_type = delegation_type;
1227 status = nfs4_open_recover(opendata, state);
c6d00e63 1228 nfs4_opendata_put(opendata);
1da177e4
LT		 1229 return status;
1230}
1231
539cd03a 1232static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1233{
1234 struct nfs_server *server = NFS_SERVER(state->inode);
1235 struct nfs4_exception exception = { };
1236 int err;
1237 do {
539cd03a 1238 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1239 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1240 break;
1241 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1242 } while (exception.retry);
1243 return err;
1244}
1245
864472e9
TM		 1246static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1247{
1248 struct nfs_open_context *ctx;
1249 int ret;
1250
1251 ctx = nfs4_state_find_open_context(state);
1252 if (IS_ERR(ctx))
1253 return PTR_ERR(ctx);
539cd03a 1254 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1255 put_nfs_open_context(ctx);
1256 return ret;
1257}
1258
13437e12 1259static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1260{
e56e0b78 1261 struct nfs4_opendata *opendata;
864472e9 1262 int ret;
1da177e4 1263
6f220ed5
TM		 1264 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1265 if (IS_ERR(opendata))
1266 return PTR_ERR(opendata);
e56e0b78 1267 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1268 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1269 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1270 ret = nfs4_open_recover(opendata, state);
c6d00e63 1271 nfs4_opendata_put(opendata);
864472e9 1272 return ret;
1da177e4
LT		 1273}
1274
13437e12 1275int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1276{
1277 struct nfs4_exception exception = { };
539cd03a 1278 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1279 int err;
1280 do {
13437e12 1281 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1282 switch (err) {
1283 case 0:
965b5d67
TM		 1284 case -ENOENT:
1285 case -ESTALE:
1286 goto out;
bcfa49f6
RL		 1287 case -NFS4ERR_BADSESSION:
1288 case -NFS4ERR_BADSLOT:
1289 case -NFS4ERR_BAD_HIGH_SLOT:
1290 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1291 case -NFS4ERR_DEADSESSION:
0400a6b0 1292 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1293 goto out;
1da177e4
LT		 1294 case -NFS4ERR_STALE_CLIENTID:
1295 case -NFS4ERR_STALE_STATEID:
1296 case -NFS4ERR_EXPIRED:
1297 /* Don't recall a delegation if it was lost */
0400a6b0 1298 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1299 goto out;
1300 case -ERESTARTSYS:
1301 /*
1302 * The show must go on: exit, but mark the
1303 * stateid as needing recovery.
1304 */
1305 case -NFS4ERR_ADMIN_REVOKED:
1306 case -NFS4ERR_BAD_STATEID:
0400a6b0 1307 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1308 case -EKEYEXPIRED:
1309 /*
1310 * User RPCSEC_GSS context has expired.
1311 * We cannot recover this stateid now, so
1312 * skip it and allow recovery thread to
1313 * proceed.
1314 */
965b5d67
TM		 1315 case -ENOMEM:
1316 err = 0;
1317 goto out;
1da177e4
LT		 1318 }
1319 err = nfs4_handle_exception(server, err, &exception);
1320 } while (exception.retry);
965b5d67 1321out:
1da177e4
LT		 1322 return err;
1323}
1324
cdd4e68b
TM		 1325static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1326{
1327 struct nfs4_opendata *data = calldata;
1328
1329 data->rpc_status = task->tk_status;
26e976a8 1330 if (data->rpc_status == 0) {
cdd4e68b
TM		 1331 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1332 sizeof(data->o_res.stateid.data));
bb22629e 1333 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1334 renew_lease(data->o_res.server, data->timestamp);
3e309914 1335 data->rpc_done = 1;
26e976a8 1336 }
cdd4e68b
TM		 1337}
1338
1339static void nfs4_open_confirm_release(void *calldata)
1340{
1341 struct nfs4_opendata *data = calldata;
1342 struct nfs4_state *state = NULL;
1343
1344 /* If this request hasn't been cancelled, do nothing */
1345 if (data->cancelled == 0)
1346 goto out_free;
1347 /* In case of error, no cleanup! */
3e309914 1348 if (!data->rpc_done)
cdd4e68b 1349 goto out_free;
cdd4e68b 1350 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1351 if (!IS_ERR(state))
dc0b027d 1352 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1353out_free:
c6d00e63 1354 nfs4_opendata_put(data);
cdd4e68b
TM		 1355}
1356
1357static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1358 .rpc_call_done = nfs4_open_confirm_done,
1359 .rpc_release = nfs4_open_confirm_release,
1360};
1361
1362/*
1363 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1364 */
1365static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1366{
1367 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1368 struct rpc_task *task;
5138fde0
TM		 1369 struct rpc_message msg = {
1370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1371 .rpc_argp = &data->c_arg,
1372 .rpc_resp = &data->c_res,
1373 .rpc_cred = data->owner->so_cred,
1374 };
c970aa85
TM		 1375 struct rpc_task_setup task_setup_data = {
1376 .rpc_client = server->client,
5138fde0 1377 .rpc_message = &msg,
c970aa85
TM		 1378 .callback_ops = &nfs4_open_confirm_ops,
1379 .callback_data = data,
101070ca 1380 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1381 .flags = RPC_TASK_ASYNC,
1382 };
1da177e4
LT		 1383 int status;
1384
c6d00e63 1385 kref_get(&data->kref);
3e309914
TM		 1386 data->rpc_done = 0;
1387 data->rpc_status = 0;
5138fde0 1388 data->timestamp = jiffies;
c970aa85 1389 task = rpc_run_task(&task_setup_data);
7a1218a2 1390 if (IS_ERR(task))
cdd4e68b 1391 return PTR_ERR(task);
cdd4e68b
TM		 1392 status = nfs4_wait_for_completion_rpc_task(task);
1393 if (status != 0) {
1394 data->cancelled = 1;
1395 smp_wmb();
1396 } else
1397 status = data->rpc_status;
e6b3c4db 1398 rpc_put_task(task);
1da177e4
LT		 1399 return status;
1400}
1401
24ac23ab 1402static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1403{
24ac23ab
TM		 1404 struct nfs4_opendata *data = calldata;
1405 struct nfs4_state_owner *sp = data->owner;
5138fde0 1406
24ac23ab
TM		 1407 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1408 return;
aac00a8d
TM		 1409 /*
1410 * Check if we still need to send an OPEN call, or if we can use
1411 * a delegation instead.
1412 */
1413 if (data->state != NULL) {
1414 struct nfs_delegation *delegation;
1415
dc0b027d 1416 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1417 goto out_no_action;
aac00a8d
TM		 1418 rcu_read_lock();
1419 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1420 if (delegation != NULL &&
15c831bf 1421 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1422 rcu_read_unlock();
6ee41268 1423 goto out_no_action;
aac00a8d
TM		 1424 }
1425 rcu_read_unlock();
1426 }
24ac23ab 1427 /* Update sequence id. */
9f958ab8 1428 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1429 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1430 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1431 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1432 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1433 }
26e976a8 1434 data->timestamp = jiffies;
035168ab 1435 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1436 &data->o_arg.seq_args,
1437 &data->o_res.seq_res, 1, task))
1438 return;
5138fde0 1439 rpc_call_start(task);
6ee41268
TM		 1440 return;
1441out_no_action:
1442 task->tk_action = NULL;
1443
24ac23ab 1444}
1da177e4 1445
b257957e
AB		 1446static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1447{
1448 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1449 nfs4_open_prepare(task, calldata);
1450}
1451
24ac23ab
TM		 1452static void nfs4_open_done(struct rpc_task *task, void *calldata)
1453{
1454 struct nfs4_opendata *data = calldata;
1da177e4 1455
24ac23ab 1456 data->rpc_status = task->tk_status;
d898528c 1457
14516c3a
TM		 1458 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1459 return;
d898528c 1460
24ac23ab
TM		 1461 if (task->tk_status == 0) {
1462 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1463 case S_IFREG:
1464 break;
1465 case S_IFLNK:
24ac23ab 1466 data->rpc_status = -ELOOP;
6f926b5b
TM		 1467 break;
1468 case S_IFDIR:
24ac23ab 1469 data->rpc_status = -EISDIR;
6f926b5b
TM		 1470 break;
1471 default:
24ac23ab 1472 data->rpc_status = -ENOTDIR;
6f926b5b 1473 }
26e976a8 1474 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1475 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1476 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1477 }
3e309914 1478 data->rpc_done = 1;
24ac23ab 1479}
6f926b5b 1480
24ac23ab
TM		 1481static void nfs4_open_release(void *calldata)
1482{
1483 struct nfs4_opendata *data = calldata;
1484 struct nfs4_state *state = NULL;
1485
1486 /* If this request hasn't been cancelled, do nothing */
1487 if (data->cancelled == 0)
1488 goto out_free;
1489 /* In case of error, no cleanup! */
3e309914 1490 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1491 goto out_free;
1492 /* In case we need an open_confirm, no cleanup! */
1493 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1494 goto out_free;
24ac23ab 1495 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1496 if (!IS_ERR(state))
dc0b027d 1497 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1498out_free:
c6d00e63 1499 nfs4_opendata_put(data);
24ac23ab
TM		 1500}
1501
1502static const struct rpc_call_ops nfs4_open_ops = {
1503 .rpc_call_prepare = nfs4_open_prepare,
1504 .rpc_call_done = nfs4_open_done,
1505 .rpc_release = nfs4_open_release,
1506};
1507
b257957e
AB		 1508static const struct rpc_call_ops nfs4_recover_open_ops = {
1509 .rpc_call_prepare = nfs4_recover_open_prepare,
1510 .rpc_call_done = nfs4_open_done,
1511 .rpc_release = nfs4_open_release,
1512};
1513
1514static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1515{
1516 struct inode *dir = data->dir->d_inode;
1517 struct nfs_server *server = NFS_SERVER(dir);
1518 struct nfs_openargs *o_arg = &data->o_arg;
1519 struct nfs_openres *o_res = &data->o_res;
1520 struct rpc_task *task;
5138fde0
TM		 1521 struct rpc_message msg = {
1522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1523 .rpc_argp = o_arg,
1524 .rpc_resp = o_res,
1525 .rpc_cred = data->owner->so_cred,
1526 };
c970aa85
TM		 1527 struct rpc_task_setup task_setup_data = {
1528 .rpc_client = server->client,
5138fde0 1529 .rpc_message = &msg,
c970aa85
TM		 1530 .callback_ops = &nfs4_open_ops,
1531 .callback_data = data,
101070ca 1532 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1533 .flags = RPC_TASK_ASYNC,
1534 };
24ac23ab
TM		 1535 int status;
1536
c6d00e63 1537 kref_get(&data->kref);
3e309914
TM		 1538 data->rpc_done = 0;
1539 data->rpc_status = 0;
2ced46c2 1540 data->cancelled = 0;
b257957e
AB		 1541 if (isrecover)
1542 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1543 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1544 if (IS_ERR(task))
1545 return PTR_ERR(task);
1546 status = nfs4_wait_for_completion_rpc_task(task);
1547 if (status != 0) {
1548 data->cancelled = 1;
1549 smp_wmb();
1550 } else
1551 status = data->rpc_status;
1552 rpc_put_task(task);
1553
1554 return status;
1555}
1556
1557static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1558{
1559 struct inode *dir = data->dir->d_inode;
1560 struct nfs_openres *o_res = &data->o_res;
1561 int status;
1562
1563 status = nfs4_run_open_task(data, 1);
1564 if (status != 0 || !data->rpc_done)
1565 return status;
1566
1567 nfs_refresh_inode(dir, o_res->dir_attr);
1568
1569 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1570 status = _nfs4_proc_open_confirm(data);
1571 if (status != 0)
1572 return status;
1573 }
1574
1575 return status;
1576}
1577
1578/*
1579 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1580 */
1581static int _nfs4_proc_open(struct nfs4_opendata *data)
1582{
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 int status;
1588
1589 status = nfs4_run_open_task(data, 0);
3e309914 1590 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1591 return status;
1592
56ae19f3
TM		 1593 if (o_arg->open_flags & O_CREAT) {
1594 update_changeattr(dir, &o_res->cinfo);
1595 nfs_post_op_update_inode(dir, o_res->dir_attr);
1596 } else
1597 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1598 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1599 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1600 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1601 status = _nfs4_proc_open_confirm(data);
1da177e4 1602 if (status != 0)
24ac23ab 1603 return status;
1da177e4
LT		 1604 }
1605 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1606 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1607 return 0;
1da177e4
LT		 1608}
1609
d83217c1 1610static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1611{
a78cb57a 1612 unsigned int loop;
6b30954e 1613 int ret;
58d9714a 1614
a78cb57a 1615 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1616 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1617 if (ret != 0)
a78cb57a 1618 break;
e598d843
TM		 1619 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1620 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1621 break;
0400a6b0 1622 nfs4_schedule_state_manager(clp);
a78cb57a 1623 ret = -EIO;
6b30954e 1624 }
a78cb57a 1625 return ret;
58d9714a
TM		 1626}
1627
d83217c1
AA		 1628static int nfs4_recover_expired_lease(struct nfs_server *server)
1629{
1630 return nfs4_client_recover_expired_lease(server->nfs_client);
1631}
1632
1da177e4
LT		 1633/*
1634 * OPEN_EXPIRED:
1635 * reclaim state on the server after a network partition.
1636 * Assumes caller holds the appropriate lock
1637 */
539cd03a 1638static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1639{
e56e0b78 1640 struct nfs4_opendata *opendata;
864472e9 1641 int ret;
1da177e4 1642
6f220ed5
TM		 1643 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1644 if (IS_ERR(opendata))
1645 return PTR_ERR(opendata);
864472e9 1646 ret = nfs4_open_recover(opendata, state);
35d05778 1647 if (ret == -ESTALE)
539cd03a 1648 d_drop(ctx->path.dentry);
c6d00e63 1649 nfs4_opendata_put(opendata);
864472e9 1650 return ret;
1da177e4
LT		 1651}
1652
a9ed2e25 1653static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1654{
539cd03a 1655 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1656 struct nfs4_exception exception = { };
1657 int err;
1658
1659 do {
539cd03a 1660 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1661 switch (err) {
1662 default:
1663 goto out;
1664 case -NFS4ERR_GRACE:
1665 case -NFS4ERR_DELAY:
1666 nfs4_handle_exception(server, err, &exception);
1667 err = 0;
1668 }
202b50dc 1669 } while (exception.retry);
a9ed2e25 1670out:
202b50dc
TM		 1671 return err;
1672}
1673
1da177e4
LT		 1674static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1675{
1da177e4 1676 struct nfs_open_context *ctx;
864472e9 1677 int ret;
1da177e4 1678
864472e9
TM		 1679 ctx = nfs4_state_find_open_context(state);
1680 if (IS_ERR(ctx))
1681 return PTR_ERR(ctx);
539cd03a 1682 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1683 put_nfs_open_context(ctx);
1684 return ret;
1da177e4
LT		 1685}
1686
aa53ed54
JL		 1687/*
1688 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1689 * fields corresponding to attributes that were used to store the verifier.
1690 * Make sure we clobber those fields in the later setattr call
1691 */
1692static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1693{
1694 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1695 !(sattr->ia_valid & ATTR_ATIME_SET))
1696 sattr->ia_valid |= ATTR_ATIME;
1697
1698 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1699 !(sattr->ia_valid & ATTR_MTIME_SET))
1700 sattr->ia_valid |= ATTR_MTIME;
1701}
1702
1da177e4 1703/*
24ac23ab 1704 * Returns a referenced nfs4_state
1da177e4 1705 */
dc0b027d 1706static 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		 1707{
1708 struct nfs4_state_owner *sp;
1709 struct nfs4_state *state = NULL;
1710 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1711 struct nfs4_opendata *opendata;
aac00a8d 1712 int status;
1da177e4
LT		 1713
1714 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1715 status = -ENOMEM;
1716 if (!(sp = nfs4_get_state_owner(server, cred))) {
1717 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1718 goto out_err;
1719 }
58d9714a
TM		 1720 status = nfs4_recover_expired_lease(server);
1721 if (status != 0)
b4454fe1 1722 goto err_put_state_owner;
aac00a8d 1723 if (path->dentry->d_inode != NULL)
dc0b027d 1724 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1725 status = -ENOMEM;
8535b2be 1726 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1727 if (opendata == NULL)
95d35cb4 1728 goto err_put_state_owner;
1da177e4 1729
aac00a8d
TM		 1730 if (path->dentry->d_inode != NULL)
1731 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1732
24ac23ab 1733 status = _nfs4_proc_open(opendata);
1da177e4 1734 if (status != 0)
c6d00e63 1735 goto err_opendata_put;
1da177e4 1736
24ac23ab 1737 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1738 status = PTR_ERR(state);
1739 if (IS_ERR(state))
c6d00e63 1740 goto err_opendata_put;
0df5dd4a 1741 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1742 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1743
1744 if (opendata->o_arg.open_flags & O_EXCL) {
1745 nfs4_exclusive_attrset(opendata, sattr);
1746
1747 nfs_fattr_init(opendata->o_res.f_attr);
1748 status = nfs4_do_setattr(state->inode, cred,
1749 opendata->o_res.f_attr, sattr,
1750 state);
1751 if (status == 0)
1752 nfs_setattr_update_inode(state->inode, sattr);
1753 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1754 }
c6d00e63 1755 nfs4_opendata_put(opendata);
1da177e4 1756 nfs4_put_state_owner(sp);
1da177e4
LT		 1757 *res = state;
1758 return 0;
c6d00e63
TM		 1759err_opendata_put:
1760 nfs4_opendata_put(opendata);
e56e0b78
TM		 1761err_put_state_owner:
1762 nfs4_put_state_owner(sp);
1da177e4 1763out_err:
1da177e4
LT		 1764 *res = NULL;
1765 return status;
1766}
1767
1768
dc0b027d 1769static 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		 1770{
1771 struct nfs4_exception exception = { };
1772 struct nfs4_state *res;
1773 int status;
1774
1775 do {
dc0b027d 1776 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1777 if (status == 0)
1778 break;
1779 /* NOTE: BAD_SEQID means the server and client disagree about the
1780 * book-keeping w.r.t. state-changing operations
1781 * (OPEN/CLOSE/LOCK/LOCKU...)
1782 * It is actually a sign of a bug on the client or on the server.
1783 *
1784 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1785 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1786 * have unhashed the old state_owner for us, and that we can
1787 * therefore safely retry using a new one. We should still warn
1788 * the user though...
1789 */
1790 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1791 printk(KERN_WARNING "NFS: v4 server %s "
1792 " returned a bad sequence-id error!\n",
1793 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1794 exception.retry = 1;
1795 continue;
1796 }
550f5747
TM		 1797 /*
1798 * BAD_STATEID on OPEN means that the server cancelled our
1799 * state before it received the OPEN_CONFIRM.
1800 * Recover by retrying the request as per the discussion
1801 * on Page 181 of RFC3530.
1802 */
1803 if (status == -NFS4ERR_BAD_STATEID) {
1804 exception.retry = 1;
1805 continue;
1806 }
aac00a8d
TM		 1807 if (status == -EAGAIN) {
1808 /* We must have found a delegation */
1809 exception.retry = 1;
1810 continue;
1811 }
1da177e4
LT		 1812 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1813 status, &exception));
1814 } while (exception.retry);
1815 return res;
1816}
1817
659bfcd6
TM		 1818static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1819 struct nfs_fattr *fattr, struct iattr *sattr,
1820 struct nfs4_state *state)
1da177e4 1821{
3e4f6290 1822 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1823 struct nfs_setattrargs arg = {
3e4f6290 1824 .fh = NFS_FH(inode),
1da177e4
LT		 1825 .iap = sattr,
1826 .server = server,
1827 .bitmask = server->attr_bitmask,
1828 };
1829 struct nfs_setattrres res = {
1830 .fattr = fattr,
1831 .server = server,
1832 };
1833 struct rpc_message msg = {
659bfcd6
TM		 1834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1835 .rpc_argp = &arg,
1836 .rpc_resp = &res,
1837 .rpc_cred = cred,
1da177e4 1838 };
26e976a8 1839 unsigned long timestamp = jiffies;
65e4308d 1840 int status;
1da177e4 1841
0e574af1 1842 nfs_fattr_init(fattr);
1da177e4 1843
3e4f6290
TM		 1844 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1845 /* Use that stateid */
1846 } else if (state != NULL) {
77041ed9 1847 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1848 } else
1da177e4
LT		 1849 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1850
7c513058 1851 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1852 if (status == 0 && state != NULL)
1853 renew_lease(server, timestamp);
65e4308d 1854 return status;
1da177e4
LT		 1855}
1856
659bfcd6
TM		 1857static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1858 struct nfs_fattr *fattr, struct iattr *sattr,
1859 struct nfs4_state *state)
1da177e4 1860{
3e4f6290 1861 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1862 struct nfs4_exception exception = { };
1863 int err;
1864 do {
1865 err = nfs4_handle_exception(server,
659bfcd6 1866 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1867 &exception);
1868 } while (exception.retry);
1869 return err;
1870}
1871
1872struct nfs4_closedata {
4a35bd41 1873 struct path path;
1da177e4
LT		 1874 struct inode *inode;
1875 struct nfs4_state *state;
1876 struct nfs_closeargs arg;
1877 struct nfs_closeres res;
516a6af6 1878 struct nfs_fattr fattr;
26e976a8 1879 unsigned long timestamp;
f7e8917a
FI		 1880 bool roc;
1881 u32 roc_barrier;
1da177e4
LT		 1882};
1883
963d8fe5 1884static void nfs4_free_closedata(void *data)
9512135d 1885{
963d8fe5
TM		 1886 struct nfs4_closedata *calldata = data;
1887 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1888
f7e8917a
FI		 1889 if (calldata->roc)
1890 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1891 nfs4_put_open_state(calldata->state);
1892 nfs_free_seqid(calldata->arg.seqid);
9512135d 1893 nfs4_put_state_owner(sp);
31f31db1 1894 path_put(&calldata->path);
9512135d
TM		 1895 kfree(calldata);
1896}
1897
88069f77
TM		 1898static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1899 fmode_t fmode)
1900{
1901 spin_lock(&state->owner->so_lock);
1902 if (!(fmode & FMODE_READ))
1903 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1904 if (!(fmode & FMODE_WRITE))
1905 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1906 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1907 spin_unlock(&state->owner->so_lock);
1908}
1909
963d8fe5 1910static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1911{
963d8fe5 1912 struct nfs4_closedata *calldata = data;
1da177e4 1913 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1914 struct nfs_server *server = NFS_SERVER(calldata->inode);
1915
14516c3a
TM		 1916 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1917 return;
1da177e4
LT		 1918 /* hmm. we are done with the inode, and in the process of freeing
1919 * the state_owner. we keep this around to process errors
1920 */
1da177e4
LT		 1921 switch (task->tk_status) {
1922 case 0:
f7e8917a
FI		 1923 if (calldata->roc)
1924 pnfs_roc_set_barrier(state->inode,
1925 calldata->roc_barrier);
45328c35 1926 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1927 renew_lease(server, calldata->timestamp);
88069f77
TM		 1928 nfs4_close_clear_stateid_flags(state,
1929 calldata->arg.fmode);
1da177e4
LT		 1930 break;
1931 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1932 case -NFS4ERR_OLD_STATEID:
1933 case -NFS4ERR_BAD_STATEID:
1da177e4 1934 case -NFS4ERR_EXPIRED:
dc0b027d 1935 if (calldata->arg.fmode == 0)
9e33bed5 1936 break;
1da177e4 1937 default:
72211dbe
TM		 1938 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1939 rpc_restart_call_prepare(task);
1da177e4 1940 }
72211dbe 1941 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1942 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1943}
1944
4ce70ada 1945static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1946{
4ce70ada 1947 struct nfs4_closedata *calldata = data;
9512135d 1948 struct nfs4_state *state = calldata->state;
88069f77 1949 int call_close = 0;
9512135d 1950
963d8fe5 1951 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1952 return;
003707c7 1953
88069f77
TM		 1954 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1955 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1956 spin_lock(&state->owner->so_lock);
003707c7 1957 /* Calculate the change in open mode */
e7616923 1958 if (state->n_rdwr == 0) {
003707c7 1959 if (state->n_rdonly == 0) {
88069f77
TM		 1960 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1961 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1962 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1963 }
1964 if (state->n_wronly == 0) {
88069f77
TM		 1965 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1966 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1967 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1968 }
e7616923 1969 }
4cecb76f 1970 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1971
1972 if (!call_close) {
963d8fe5
TM		 1973 /* Note: exit _without_ calling nfs4_close_done */
1974 task->tk_action = NULL;
9512135d
TM		 1975 return;
1976 }
88069f77 1977
f7e8917a 1978 if (calldata->arg.fmode == 0) {
88069f77 1979 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1980 if (calldata->roc &&
1981 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1982 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1983 task, NULL);
1984 return;
1985 }
1986 }
88069f77 1987
516a6af6 1988 nfs_fattr_init(calldata->res.fattr);
26e976a8 1989 calldata->timestamp = jiffies;
035168ab 1990 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1991 &calldata->arg.seq_args, &calldata->res.seq_res,
1992 1, task))
1993 return;
5138fde0 1994 rpc_call_start(task);
1da177e4
LT		 1995}
1996
963d8fe5 1997static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1998 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1999 .rpc_call_done = nfs4_close_done,
2000 .rpc_release = nfs4_free_closedata,
2001};
2002
1da177e4
LT		 2003/*
2004 * It is possible for data to be read/written from a mem-mapped file
2005 * after the sys_close call (which hits the vfs layer as a flush).
2006 * This means that we can't safely call nfsv4 close on a file until
2007 * the inode is cleared. This in turn means that we are not good
2008 * NFSv4 citizens - we do not indicate to the server to update the file's
2009 * share state even when we are done with one of the three share
2010 * stateid's in the inode.
2011 *
2012 * NOTE: Caller must be holding the sp->so_owner semaphore!
2013 */
f7e8917a 2014int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2015{
4a35bd41 2016 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2017 struct nfs4_closedata *calldata;
b39e625b
TM		 2018 struct nfs4_state_owner *sp = state->owner;
2019 struct rpc_task *task;
5138fde0
TM		 2020 struct rpc_message msg = {
2021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2022 .rpc_cred = state->owner->so_cred,
2023 };
c970aa85
TM		 2024 struct rpc_task_setup task_setup_data = {
2025 .rpc_client = server->client,
5138fde0 2026 .rpc_message = &msg,
c970aa85 2027 .callback_ops = &nfs4_close_ops,
101070ca 2028 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2029 .flags = RPC_TASK_ASYNC,
2030 };
9512135d 2031 int status = -ENOMEM;
1da177e4 2032
8535b2be 2033 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2034 if (calldata == NULL)
9512135d 2035 goto out;
4a35bd41 2036 calldata->inode = state->inode;
1da177e4 2037 calldata->state = state;
4a35bd41 2038 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2039 calldata->arg.stateid = &state->open_stateid;
1da177e4 2040 /* Serialization for the sequence id */
8535b2be 2041 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2042 if (calldata->arg.seqid == NULL)
2043 goto out_free_calldata;
dc0b027d 2044 calldata->arg.fmode = 0;
a65318bf 2045 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2046 calldata->res.fattr = &calldata->fattr;
c1d51931 2047 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2048 calldata->res.server = server;
f7e8917a 2049 calldata->roc = roc;
f6948697
AV		 2050 path_get(path);
2051 calldata->path = *path;
9512135d 2052
1174dd1f
TM		 2053 msg.rpc_argp = &calldata->arg;
2054 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2055 task_setup_data.callback_data = calldata;
2056 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2057 if (IS_ERR(task))
2058 return PTR_ERR(task);
a49c3c77
TM		 2059 status = 0;
2060 if (wait)
2061 status = rpc_wait_for_completion_task(task);
b39e625b 2062 rpc_put_task(task);
a49c3c77 2063 return status;
9512135d
TM		 2064out_free_calldata:
2065 kfree(calldata);
2066out:
f7e8917a
FI		 2067 if (roc)
2068 pnfs_roc_release(state->inode);
b39e625b
TM		 2069 nfs4_put_open_state(state);
2070 nfs4_put_state_owner(sp);
9512135d 2071 return status;
1da177e4
LT		 2072}
2073
2b484297 2074static struct inode *
cd9a1c0e 2075nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2076{
1da177e4 2077 struct nfs4_state *state;
1da177e4 2078
565277f6 2079 /* Protect against concurrent sillydeletes */
cd9a1c0e 2080 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2081 if (IS_ERR(state))
2082 return ERR_CAST(state);
cd9a1c0e 2083 ctx->state = state;
f46e0bd3 2084 return igrab(state->inode);
1da177e4
LT		 2085}
2086
1185a552 2087static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2088{
2089 if (ctx->state == NULL)
2090 return;
2091 if (is_sync)
2092 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2093 else
2094 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2095}
1da177e4
LT		 2096
2097static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2098{
43652ad5
BH		 2099 struct nfs4_server_caps_arg args = {
2100 .fhandle = fhandle,
2101 };
1da177e4
LT		 2102 struct nfs4_server_caps_res res = {};
2103 struct rpc_message msg = {
2104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2105 .rpc_argp = &args,
1da177e4
LT		 2106 .rpc_resp = &res,
2107 };
2108 int status;
2109
7c513058 2110 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2111 if (status == 0) {
2112 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2113 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2114 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2115 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2116 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2117 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2118 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2119 server->caps |= NFS_CAP_ACLS;
2120 if (res.has_links != 0)
2121 server->caps |= NFS_CAP_HARDLINKS;
2122 if (res.has_symlinks != 0)
2123 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2124 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2125 server->caps |= NFS_CAP_FILEID;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2127 server->caps |= NFS_CAP_MODE;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2129 server->caps |= NFS_CAP_NLINK;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2131 server->caps |= NFS_CAP_OWNER;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2133 server->caps |= NFS_CAP_OWNER_GROUP;
2134 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2135 server->caps |= NFS_CAP_ATIME;
2136 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2137 server->caps |= NFS_CAP_CTIME;
2138 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2139 server->caps |= NFS_CAP_MTIME;
2140
a65318bf
TM		 2141 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2142 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2143 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2144 server->acl_bitmask = res.acl_bitmask;
2145 }
cccef3b9 2146
1da177e4
LT		 2147 return status;
2148}
2149
55a97593 2150int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2151{
2152 struct nfs4_exception exception = { };
2153 int err;
2154 do {
2155 err = nfs4_handle_exception(server,
2156 _nfs4_server_capabilities(server, fhandle),
2157 &exception);
2158 } while (exception.retry);
2159 return err;
2160}
2161
2162static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2163 struct nfs_fsinfo *info)
2164{
1da177e4
LT		 2165 struct nfs4_lookup_root_arg args = {
2166 .bitmask = nfs4_fattr_bitmap,
2167 };
2168 struct nfs4_lookup_res res = {
2169 .server = server,
0e574af1 2170 .fattr = info->fattr,
1da177e4
LT		 2171 .fh = fhandle,
2172 };
2173 struct rpc_message msg = {
2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2175 .rpc_argp = &args,
2176 .rpc_resp = &res,
2177 };
008f55d0 2178
0e574af1 2179 nfs_fattr_init(info->fattr);
7c513058 2180 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2181}
2182
2183static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2184 struct nfs_fsinfo *info)
2185{
2186 struct nfs4_exception exception = { };
2187 int err;
2188 do {
2189 err = nfs4_handle_exception(server,
2190 _nfs4_lookup_root(server, fhandle, info),
2191 &exception);
2192 } while (exception.retry);
2193 return err;
2194}
2195
8f70e95f
BS		 2196static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2197 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2198{
2199 struct rpc_auth *auth;
2200 int ret;
2201
2202 auth = rpcauth_create(flavor, server->client);
2203 if (!auth) {
2204 ret = -EIO;
2205 goto out;
2206 }
2207 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2208out:
2209 return ret;
2210}
2211
801a16dc 2212static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2213 struct nfs_fsinfo *info)
1da177e4 2214{
8f70e95f 2215 int i, len, status = 0;
0fabee24 2216 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2217
801a16dc
BS		 2218 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2219 flav_array[len] = RPC_AUTH_NULL;
2220 len += 1;
8f70e95f
BS		 2221
2222 for (i = 0; i < len; i++) {
2223 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
d1a8016a
BS		 2224 if (status == -EPERM || status == -EACCES)
2225 continue;
2226 break;
8f70e95f 2227 }
801a16dc
BS		 2228 return status;
2229}
2230
2231/*
2232 * get the file handle for the "/" directory on the server
2233 */
2234static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2235 struct nfs_fsinfo *info)
2236{
2237 int status = nfs4_lookup_root(server, fhandle, info);
9b7160c5 2238 if ((status == -EPERM) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
801a16dc 2239 status = nfs4_find_root_sec(server, fhandle, info);
1da177e4
LT		 2240 if (status == 0)
2241 status = nfs4_server_capabilities(server, fhandle);
2242 if (status == 0)
2243 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2244 return nfs4_map_errors(status);
1da177e4
LT		 2245}
2246
6b97fd3d
MN		 2247/*
2248 * Get locations and (maybe) other attributes of a referral.
2249 * Note that we'll actually follow the referral later when
2250 * we detect fsid mismatch in inode revalidation
2251 */
56659e99 2252static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2253{
2254 int status = -ENOMEM;
2255 struct page *page = NULL;
2256 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2257
2258 page = alloc_page(GFP_KERNEL);
2259 if (page == NULL)
2260 goto out;
2261 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2262 if (locations == NULL)
2263 goto out;
2264
c228fd3a 2265 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2266 if (status != 0)
2267 goto out;
2268 /* Make sure server returned a different fsid for the referral */
2269 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2270 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2271 status = -EIO;
2272 goto out;
2273 }
2274
2275 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2276 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2277 if (!fattr->mode)
2278 fattr->mode = S_IFDIR;
2279 memset(fhandle, 0, sizeof(struct nfs_fh));
2280out:
2281 if (page)
2282 __free_page(page);
5d7ca35a 2283 kfree(locations);
6b97fd3d
MN		 2284 return status;
2285}
2286
1da177e4
LT		 2287static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2288{
2289 struct nfs4_getattr_arg args = {
2290 .fh = fhandle,
2291 .bitmask = server->attr_bitmask,
2292 };
2293 struct nfs4_getattr_res res = {
2294 .fattr = fattr,
2295 .server = server,
2296 };
2297 struct rpc_message msg = {
2298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2299 .rpc_argp = &args,
2300 .rpc_resp = &res,
2301 };
2302
0e574af1 2303 nfs_fattr_init(fattr);
7c513058 2304 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2305}
2306
2307static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2308{
2309 struct nfs4_exception exception = { };
2310 int err;
2311 do {
2312 err = nfs4_handle_exception(server,
2313 _nfs4_proc_getattr(server, fhandle, fattr),
2314 &exception);
2315 } while (exception.retry);
2316 return err;
2317}
2318
2319/*
2320 * The file is not closed if it is opened due to the a request to change
2321 * the size of the file. The open call will not be needed once the
2322 * VFS layer lookup-intents are implemented.
2323 *
2324 * Close is called when the inode is destroyed.
2325 * If we haven't opened the file for O_WRONLY, we
2326 * need to in the size_change case to obtain a stateid.
2327 *
2328 * Got race?
2329 * Because OPEN is always done by name in nfsv4, it is
2330 * possible that we opened a different file by the same
2331 * name. We can recognize this race condition, but we
2332 * can't do anything about it besides returning an error.
2333 *
2334 * This will be fixed with VFS changes (lookup-intent).
2335 */
2336static int
2337nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2338 struct iattr *sattr)
2339{
08e9eac4 2340 struct inode *inode = dentry->d_inode;
659bfcd6 2341 struct rpc_cred *cred = NULL;
d530838b 2342 struct nfs4_state *state = NULL;
1da177e4
LT		 2343 int status;
2344
0e574af1 2345 nfs_fattr_init(fattr);
1da177e4 2346
d530838b 2347 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2348 if (sattr->ia_valid & ATTR_FILE) {
2349 struct nfs_open_context *ctx;
2350
2351 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2352 if (ctx) {
2353 cred = ctx->cred;
2354 state = ctx->state;
2355 }
659bfcd6 2356 }
08e9eac4 2357
659bfcd6 2358 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2359 if (status == 0)
2360 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2361 return status;
2362}
2363
7c513058
BS		 2364static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2365 const struct nfs_fh *dirfh, const struct qstr *name,
2366 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2367{
2368 int status;
2369 struct nfs4_lookup_arg args = {
2370 .bitmask = server->attr_bitmask,
2371 .dir_fh = dirfh,
2372 .name = name,
2373 };
2374 struct nfs4_lookup_res res = {
2375 .server = server,
2376 .fattr = fattr,
2377 .fh = fhandle,
2378 };
2379 struct rpc_message msg = {
2380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2381 .rpc_argp = &args,
2382 .rpc_resp = &res,
2383 };
2384
2385 nfs_fattr_init(fattr);
2386
2387 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2388 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2389 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2390 return status;
2391}
2392
2393static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2394 struct qstr *name, struct nfs_fh *fhandle,
2395 struct nfs_fattr *fattr)
2396{
2397 struct nfs4_exception exception = { };
2398 int err;
2399 do {
7c513058 2400 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2401 /* FIXME: !!!! */
2402 if (err == -NFS4ERR_MOVED) {
2403 err = -EREMOTE;
2404 break;
2405 }
2406 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2407 } while (exception.retry);
2408 return err;
2409}
2410
7c513058
BS		 2411static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2412 const struct qstr *name, struct nfs_fh *fhandle,
2413 struct nfs_fattr *fattr)
1da177e4 2414{
4e56e082 2415 int status;
1da177e4
LT		 2416
2417 dprintk("NFS call lookup %s\n", name->name);
7c513058 2418 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2419 if (status == -NFS4ERR_MOVED)
2420 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2421 dprintk("NFS reply lookup: %d\n", status);
2422 return status;
2423}
2424
7ebb9315
BS		 2425void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2426{
2427 memset(fh, 0, sizeof(struct nfs_fh));
2428 fattr->fsid.major = 1;
2429 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2430 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2431 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2432 fattr->nlink = 2;
2433}
2434
7c513058
BS		 2435static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2436 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2437{
2438 struct nfs4_exception exception = { };
2439 int err;
2440 do {
2441 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2442 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4 2443 &exception);
7ebb9315
BS		 2444 if (err == -EPERM)
2445 nfs_fixup_secinfo_attributes(fattr, fhandle);
1da177e4
LT		 2446 } while (exception.retry);
2447 return err;
2448}
2449
2450static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2451{
76b32999 2452 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2453 struct nfs4_accessargs args = {
2454 .fh = NFS_FH(inode),
76b32999
TM		 2455 .bitmask = server->attr_bitmask,
2456 };
2457 struct nfs4_accessres res = {
2458 .server = server,
1da177e4 2459 };
1da177e4
LT		 2460 struct rpc_message msg = {
2461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2462 .rpc_argp = &args,
2463 .rpc_resp = &res,
2464 .rpc_cred = entry->cred,
2465 };
2466 int mode = entry->mask;
2467 int status;
2468
2469 /*
2470 * Determine which access bits we want to ask for...
2471 */
2472 if (mode & MAY_READ)
2473 args.access |= NFS4_ACCESS_READ;
2474 if (S_ISDIR(inode->i_mode)) {
2475 if (mode & MAY_WRITE)
2476 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2477 if (mode & MAY_EXEC)
2478 args.access |= NFS4_ACCESS_LOOKUP;
2479 } else {
2480 if (mode & MAY_WRITE)
2481 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2482 if (mode & MAY_EXEC)
2483 args.access |= NFS4_ACCESS_EXECUTE;
2484 }
c407d41a
TM		 2485
2486 res.fattr = nfs_alloc_fattr();
2487 if (res.fattr == NULL)
2488 return -ENOMEM;
2489
7c513058 2490 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2491 if (!status) {
2492 entry->mask = 0;
2493 if (res.access & NFS4_ACCESS_READ)
2494 entry->mask |= MAY_READ;
2495 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2496 entry->mask |= MAY_WRITE;
2497 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2498 entry->mask |= MAY_EXEC;
c407d41a 2499 nfs_refresh_inode(inode, res.fattr);
1da177e4 2500 }
c407d41a 2501 nfs_free_fattr(res.fattr);
1da177e4
LT		 2502 return status;
2503}
2504
2505static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 err = nfs4_handle_exception(NFS_SERVER(inode),
2511 _nfs4_proc_access(inode, entry),
2512 &exception);
2513 } while (exception.retry);
2514 return err;
2515}
2516
2517/*
2518 * TODO: For the time being, we don't try to get any attributes
2519 * along with any of the zero-copy operations READ, READDIR,
2520 * READLINK, WRITE.
2521 *
2522 * In the case of the first three, we want to put the GETATTR
2523 * after the read-type operation -- this is because it is hard
2524 * to predict the length of a GETATTR response in v4, and thus
2525 * align the READ data correctly. This means that the GETATTR
2526 * may end up partially falling into the page cache, and we should
2527 * shift it into the 'tail' of the xdr_buf before processing.
2528 * To do this efficiently, we need to know the total length
2529 * of data received, which doesn't seem to be available outside
2530 * of the RPC layer.
2531 *
2532 * In the case of WRITE, we also want to put the GETATTR after
2533 * the operation -- in this case because we want to make sure
2534 * we get the post-operation mtime and size. This means that
2535 * we can't use xdr_encode_pages() as written: we need a variant
2536 * of it which would leave room in the 'tail' iovec.
2537 *
2538 * Both of these changes to the XDR layer would in fact be quite
2539 * minor, but I decided to leave them for a subsequent patch.
2540 */
2541static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2542 unsigned int pgbase, unsigned int pglen)
2543{
2544 struct nfs4_readlink args = {
2545 .fh = NFS_FH(inode),
2546 .pgbase = pgbase,
2547 .pglen = pglen,
2548 .pages = &page,
2549 };
f50c7000 2550 struct nfs4_readlink_res res;
1da177e4
LT		 2551 struct rpc_message msg = {
2552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2553 .rpc_argp = &args,
f50c7000 2554 .rpc_resp = &res,
1da177e4
LT		 2555 };
2556
7c513058 2557 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2558}
2559
2560static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2561 unsigned int pgbase, unsigned int pglen)
2562{
2563 struct nfs4_exception exception = { };
2564 int err;
2565 do {
2566 err = nfs4_handle_exception(NFS_SERVER(inode),
2567 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2568 &exception);
2569 } while (exception.retry);
2570 return err;
2571}
2572
1da177e4
LT		 2573/*
2574 * Got race?
2575 * We will need to arrange for the VFS layer to provide an atomic open.
2576 * Until then, this create/open method is prone to inefficiency and race
2577 * conditions due to the lookup, create, and open VFS calls from sys_open()
2578 * placed on the wire.
2579 *
2580 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2581 * The file will be opened again in the subsequent VFS open call
2582 * (nfs4_proc_file_open).
2583 *
2584 * The open for read will just hang around to be used by any process that
2585 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2586 */
2587
2588static int
2589nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2590 int flags, struct nfs_open_context *ctx)
1da177e4 2591{
c0204fd2 2592 struct path my_path = {
ad389da7
TM		 2593 .dentry = dentry,
2594 };
c0204fd2 2595 struct path *path = &my_path;
1da177e4 2596 struct nfs4_state *state;
c0204fd2
TM		 2597 struct rpc_cred *cred = NULL;
2598 fmode_t fmode = 0;
1da177e4
LT		 2599 int status = 0;
2600
c0204fd2
TM		 2601 if (ctx != NULL) {
2602 cred = ctx->cred;
2603 path = &ctx->path;
2604 fmode = ctx->mode;
1da177e4 2605 }
a8a5da99 2606 sattr->ia_mode &= ~current_umask();
c0204fd2 2607 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2608 d_drop(dentry);
1da177e4
LT		 2609 if (IS_ERR(state)) {
2610 status = PTR_ERR(state);
c0204fd2 2611 goto out;
1da177e4 2612 }
d4d9cdcb 2613 d_add(dentry, igrab(state->inode));
d75340cc 2614 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2615 if (ctx != NULL)
2616 ctx->state = state;
02a913a7 2617 else
c0204fd2 2618 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2619out:
2620 return status;
2621}
2622
2623static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2624{
16e42959 2625 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2626 struct nfs_removeargs args = {
1da177e4 2627 .fh = NFS_FH(dir),
4fdc17b2
TM		 2628 .name.len = name->len,
2629 .name.name = name->name,
16e42959
TM		 2630 .bitmask = server->attr_bitmask,
2631 };
4fdc17b2 2632 struct nfs_removeres res = {
16e42959 2633 .server = server,
1da177e4 2634 };
1da177e4 2635 struct rpc_message msg = {
4fdc17b2
TM		 2636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2637 .rpc_argp = &args,
2638 .rpc_resp = &res,
1da177e4 2639 };
d346890b
TM		 2640 int status = -ENOMEM;
2641
2642 res.dir_attr = nfs_alloc_fattr();
2643 if (res.dir_attr == NULL)
2644 goto out;
1da177e4 2645
7c513058 2646 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2647 if (status == 0) {
2648 update_changeattr(dir, &res.cinfo);
d346890b 2649 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2650 }
d346890b
TM		 2651 nfs_free_fattr(res.dir_attr);
2652out:
1da177e4
LT		 2653 return status;
2654}
2655
2656static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2657{
2658 struct nfs4_exception exception = { };
2659 int err;
2660 do {
2661 err = nfs4_handle_exception(NFS_SERVER(dir),
2662 _nfs4_proc_remove(dir, name),
2663 &exception);
2664 } while (exception.retry);
2665 return err;
2666}
2667
e4eff1a6 2668static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2669{
e4eff1a6
TM		 2670 struct nfs_server *server = NFS_SERVER(dir);
2671 struct nfs_removeargs *args = msg->rpc_argp;
2672 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2673
a65318bf 2674 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2675 res->server = server;
dfb4f309 2676 res->seq_res.sr_slot = NULL;
1da177e4 2677 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2678}
2679
e4eff1a6 2680static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2681{
e4eff1a6
TM		 2682 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2683
14516c3a
TM		 2684 if (!nfs4_sequence_done(task, &res->seq_res))
2685 return 0;
9e33bed5 2686 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2687 return 0;
2688 update_changeattr(dir, &res->cinfo);
d346890b 2689 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2690 return 1;
1da177e4
LT		 2691}
2692
d3d4152a
JL		 2693static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2694{
2695 struct nfs_server *server = NFS_SERVER(dir);
2696 struct nfs_renameargs *arg = msg->rpc_argp;
2697 struct nfs_renameres *res = msg->rpc_resp;
2698
2699 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2700 arg->bitmask = server->attr_bitmask;
2701 res->server = server;
2702}
2703
2704static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2705 struct inode *new_dir)
2706{
2707 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2708
2709 if (!nfs4_sequence_done(task, &res->seq_res))
2710 return 0;
2711 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2712 return 0;
2713
2714 update_changeattr(old_dir, &res->old_cinfo);
2715 nfs_post_op_update_inode(old_dir, res->old_fattr);
2716 update_changeattr(new_dir, &res->new_cinfo);
2717 nfs_post_op_update_inode(new_dir, res->new_fattr);
2718 return 1;
2719}
2720
1da177e4
LT		 2721static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2722 struct inode *new_dir, struct qstr *new_name)
2723{
6caf2c82 2724 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2725 struct nfs_renameargs arg = {
1da177e4
LT		 2726 .old_dir = NFS_FH(old_dir),
2727 .new_dir = NFS_FH(new_dir),
2728 .old_name = old_name,
2729 .new_name = new_name,
6caf2c82
TM		 2730 .bitmask = server->attr_bitmask,
2731 };
e8582a8b 2732 struct nfs_renameres res = {
6caf2c82 2733 .server = server,
1da177e4 2734 };
1da177e4
LT		 2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2737 .rpc_argp = &arg,
2738 .rpc_resp = &res,
2739 };
011fff72 2740 int status = -ENOMEM;
1da177e4 2741
011fff72
TM		 2742 res.old_fattr = nfs_alloc_fattr();
2743 res.new_fattr = nfs_alloc_fattr();
2744 if (res.old_fattr == NULL || res.new_fattr == NULL)
2745 goto out;
1da177e4 2746
7c513058 2747 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2748 if (!status) {
2749 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2750 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2751 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2752 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2753 }
011fff72
TM		 2754out:
2755 nfs_free_fattr(res.new_fattr);
2756 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2757 return status;
2758}
2759
2760static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2761 struct inode *new_dir, struct qstr *new_name)
2762{
2763 struct nfs4_exception exception = { };
2764 int err;
2765 do {
2766 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2767 _nfs4_proc_rename(old_dir, old_name,
2768 new_dir, new_name),
2769 &exception);
2770 } while (exception.retry);
2771 return err;
2772}
2773
2774static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2775{
91ba2eee 2776 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2777 struct nfs4_link_arg arg = {
2778 .fh = NFS_FH(inode),
2779 .dir_fh = NFS_FH(dir),
2780 .name = name,
91ba2eee
TM		 2781 .bitmask = server->attr_bitmask,
2782 };
91ba2eee
TM		 2783 struct nfs4_link_res res = {
2784 .server = server,
1da177e4 2785 };
1da177e4
LT		 2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2788 .rpc_argp = &arg,
91ba2eee 2789 .rpc_resp = &res,
1da177e4 2790 };
136f2627
TM		 2791 int status = -ENOMEM;
2792
2793 res.fattr = nfs_alloc_fattr();
2794 res.dir_attr = nfs_alloc_fattr();
2795 if (res.fattr == NULL || res.dir_attr == NULL)
2796 goto out;
1da177e4 2797
7c513058 2798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2799 if (!status) {
2800 update_changeattr(dir, &res.cinfo);
2801 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2802 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2803 }
136f2627
TM		 2804out:
2805 nfs_free_fattr(res.dir_attr);
2806 nfs_free_fattr(res.fattr);
1da177e4
LT		 2807 return status;
2808}
2809
2810static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2811{
2812 struct nfs4_exception exception = { };
2813 int err;
2814 do {
2815 err = nfs4_handle_exception(NFS_SERVER(inode),
2816 _nfs4_proc_link(inode, dir, name),
2817 &exception);
2818 } while (exception.retry);
2819 return err;
2820}
2821
57dc9a57
TM		 2822struct nfs4_createdata {
2823 struct rpc_message msg;
2824 struct nfs4_create_arg arg;
2825 struct nfs4_create_res res;
2826 struct nfs_fh fh;
2827 struct nfs_fattr fattr;
2828 struct nfs_fattr dir_fattr;
2829};
2830
2831static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2832 struct qstr *name, struct iattr *sattr, u32 ftype)
2833{
2834 struct nfs4_createdata *data;
2835
2836 data = kzalloc(sizeof(*data), GFP_KERNEL);
2837 if (data != NULL) {
2838 struct nfs_server *server = NFS_SERVER(dir);
2839
2840 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2841 data->msg.rpc_argp = &data->arg;
2842 data->msg.rpc_resp = &data->res;
2843 data->arg.dir_fh = NFS_FH(dir);
2844 data->arg.server = server;
2845 data->arg.name = name;
2846 data->arg.attrs = sattr;
2847 data->arg.ftype = ftype;
2848 data->arg.bitmask = server->attr_bitmask;
2849 data->res.server = server;
2850 data->res.fh = &data->fh;
2851 data->res.fattr = &data->fattr;
2852 data->res.dir_fattr = &data->dir_fattr;
2853 nfs_fattr_init(data->res.fattr);
2854 nfs_fattr_init(data->res.dir_fattr);
2855 }
2856 return data;
2857}
2858
2859static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2860{
7c513058 2861 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2862 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2863 if (status == 0) {
2864 update_changeattr(dir, &data->res.dir_cinfo);
2865 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2866 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2867 }
2868 return status;
2869}
2870
2871static void nfs4_free_createdata(struct nfs4_createdata *data)
2872{
2873 kfree(data);
2874}
2875
4f390c15 2876static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2877 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2878{
57dc9a57
TM		 2879 struct nfs4_createdata *data;
2880 int status = -ENAMETOOLONG;
1da177e4 2881
94a6d753 2882 if (len > NFS4_MAXPATHLEN)
57dc9a57 2883 goto out;
4f390c15 2884
57dc9a57
TM		 2885 status = -ENOMEM;
2886 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2887 if (data == NULL)
2888 goto out;
2889
2890 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2891 data->arg.u.symlink.pages = &page;
2892 data->arg.u.symlink.len = len;
1da177e4 2893
57dc9a57
TM		 2894 status = nfs4_do_create(dir, dentry, data);
2895
2896 nfs4_free_createdata(data);
2897out:
1da177e4
LT		 2898 return status;
2899}
2900
4f390c15 2901static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2902 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2903{
2904 struct nfs4_exception exception = { };
2905 int err;
2906 do {
2907 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2908 _nfs4_proc_symlink(dir, dentry, page,
2909 len, sattr),
1da177e4
LT		 2910 &exception);
2911 } while (exception.retry);
2912 return err;
2913}
2914
2915static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2916 struct iattr *sattr)
2917{
57dc9a57
TM		 2918 struct nfs4_createdata *data;
2919 int status = -ENOMEM;
1da177e4 2920
57dc9a57
TM		 2921 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2922 if (data == NULL)
2923 goto out;
2924
2925 status = nfs4_do_create(dir, dentry, data);
2926
2927 nfs4_free_createdata(data);
2928out:
1da177e4
LT		 2929 return status;
2930}
2931
2932static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2933 struct iattr *sattr)
2934{
2935 struct nfs4_exception exception = { };
2936 int err;
a8a5da99
AK		 2937
2938 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2939 do {
2940 err = nfs4_handle_exception(NFS_SERVER(dir),
2941 _nfs4_proc_mkdir(dir, dentry, sattr),
2942 &exception);
2943 } while (exception.retry);
2944 return err;
2945}
2946
2947static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2948 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2949{
2950 struct inode *dir = dentry->d_inode;
2951 struct nfs4_readdir_arg args = {
2952 .fh = NFS_FH(dir),
56e4ebf8 2953 .pages = pages,
1da177e4
LT		 2954 .pgbase = 0,
2955 .count = count,
96d25e53 2956 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2957 .plus = plus,
1da177e4
LT		 2958 };
2959 struct nfs4_readdir_res res;
2960 struct rpc_message msg = {
2961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2962 .rpc_argp = &args,
2963 .rpc_resp = &res,
2964 .rpc_cred = cred,
2965 };
2966 int status;
2967
3110ff80 2968 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2969 dentry->d_parent->d_name.name,
2970 dentry->d_name.name,
2971 (unsigned long long)cookie);
1da177e4
LT		 2972 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2973 res.pgbase = args.pgbase;
7c513058 2974 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 2975 if (status >= 0) {
1da177e4 2976 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2977 status += args.pgbase;
2978 }
c4812998
TM		 2979
2980 nfs_invalidate_atime(dir);
2981
3110ff80 2982 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2983 return status;
2984}
2985
2986static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2987 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991 do {
2992 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2993 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2994 pages, count, plus),
1da177e4
LT		 2995 &exception);
2996 } while (exception.retry);
2997 return err;
2998}
2999
3000static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3001 struct iattr *sattr, dev_t rdev)
3002{
57dc9a57
TM		 3003 struct nfs4_createdata *data;
3004 int mode = sattr->ia_mode;
3005 int status = -ENOMEM;
1da177e4
LT		 3006
3007 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3008 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3009
3010 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3011 if (data == NULL)
3012 goto out;
3013
1da177e4 3014 if (S_ISFIFO(mode))
57dc9a57 3015 data->arg.ftype = NF4FIFO;
1da177e4 3016 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3017 data->arg.ftype = NF4BLK;
3018 data->arg.u.device.specdata1 = MAJOR(rdev);
3019 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3020 }
3021 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3022 data->arg.ftype = NF4CHR;
3023 data->arg.u.device.specdata1 = MAJOR(rdev);
3024 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3025 }
1da177e4 3026
57dc9a57
TM		 3027 status = nfs4_do_create(dir, dentry, data);
3028
3029 nfs4_free_createdata(data);
3030out:
1da177e4
LT		 3031 return status;
3032}
3033
3034static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3035 struct iattr *sattr, dev_t rdev)
3036{
3037 struct nfs4_exception exception = { };
3038 int err;
a8a5da99
AK		 3039
3040 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3041 do {
3042 err = nfs4_handle_exception(NFS_SERVER(dir),
3043 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3044 &exception);
3045 } while (exception.retry);
3046 return err;
3047}
3048
3049static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3050 struct nfs_fsstat *fsstat)
3051{
3052 struct nfs4_statfs_arg args = {
3053 .fh = fhandle,
3054 .bitmask = server->attr_bitmask,
3055 };
24ad148a
BH		 3056 struct nfs4_statfs_res res = {
3057 .fsstat = fsstat,
3058 };
1da177e4
LT		 3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3061 .rpc_argp = &args,
24ad148a 3062 .rpc_resp = &res,
1da177e4
LT		 3063 };
3064
0e574af1 3065 nfs_fattr_init(fsstat->fattr);
7c513058 3066 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3067}
3068
3069static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3070{
3071 struct nfs4_exception exception = { };
3072 int err;
3073 do {
3074 err = nfs4_handle_exception(server,
3075 _nfs4_proc_statfs(server, fhandle, fsstat),
3076 &exception);
3077 } while (exception.retry);
3078 return err;
3079}
3080
3081static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3082 struct nfs_fsinfo *fsinfo)
3083{
3084 struct nfs4_fsinfo_arg args = {
3085 .fh = fhandle,
3086 .bitmask = server->attr_bitmask,
3087 };
3dda5e43
BH		 3088 struct nfs4_fsinfo_res res = {
3089 .fsinfo = fsinfo,
3090 };
1da177e4
LT		 3091 struct rpc_message msg = {
3092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3093 .rpc_argp = &args,
3dda5e43 3094 .rpc_resp = &res,
1da177e4
LT		 3095 };
3096
7c513058 3097 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3098}
3099
3100static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3101{
3102 struct nfs4_exception exception = { };
3103 int err;
3104
3105 do {
3106 err = nfs4_handle_exception(server,
3107 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3108 &exception);
3109 } while (exception.retry);
3110 return err;
3111}
3112
3113static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3114{
0e574af1 3115 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3116 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3117}
3118
3119static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3120 struct nfs_pathconf *pathconf)
3121{
3122 struct nfs4_pathconf_arg args = {
3123 .fh = fhandle,
3124 .bitmask = server->attr_bitmask,
3125 };
d45b2989
BH		 3126 struct nfs4_pathconf_res res = {
3127 .pathconf = pathconf,
3128 };
1da177e4
LT		 3129 struct rpc_message msg = {
3130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3131 .rpc_argp = &args,
d45b2989 3132 .rpc_resp = &res,
1da177e4
LT		 3133 };
3134
3135 /* None of the pathconf attributes are mandatory to implement */
3136 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3137 memset(pathconf, 0, sizeof(*pathconf));
3138 return 0;
3139 }
3140
0e574af1 3141 nfs_fattr_init(pathconf->fattr);
7c513058 3142 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3143}
3144
3145static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3146 struct nfs_pathconf *pathconf)
3147{
3148 struct nfs4_exception exception = { };
3149 int err;
3150
3151 do {
3152 err = nfs4_handle_exception(server,
3153 _nfs4_proc_pathconf(server, fhandle, pathconf),
3154 &exception);
3155 } while (exception.retry);
3156 return err;
3157}
3158
cbdabc7f 3159static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3160{
ec06c096 3161 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3162
9e33bed5 3163 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3164 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3165 return -EAGAIN;
1da177e4 3166 }
8850df99
TM		 3167
3168 nfs_invalidate_atime(data->inode);
1da177e4 3169 if (task->tk_status > 0)
ec06c096
TM		 3170 renew_lease(server, data->timestamp);
3171 return 0;
1da177e4
LT		 3172}
3173
cbdabc7f
AA		 3174static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3175{
3176
3177 dprintk("--> %s\n", __func__);
3178
3179 if (!nfs4_sequence_done(task, &data->res.seq_res))
3180 return -EAGAIN;
3181
3182 return data->read_done_cb(task, data);
3183}
3184
bdc7f021 3185static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3186{
1da177e4 3187 data->timestamp = jiffies;
cbdabc7f 3188 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3189 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3190}
3191
cbdabc7f
AA		 3192/* Reset the the nfs_read_data to send the read to the MDS. */
3193void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3194{
3195 dprintk("%s Reset task for i/o through\n", __func__);
3196 put_lseg(data->lseg);
3197 data->lseg = NULL;
3198 /* offsets will differ in the dense stripe case */
3199 data->args.offset = data->mds_offset;
3200 data->ds_clp = NULL;
3201 data->args.fh = NFS_FH(data->inode);
3202 data->read_done_cb = nfs4_read_done_cb;
3203 task->tk_ops = data->mds_ops;
3204 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3205}
3206EXPORT_SYMBOL_GPL(nfs4_reset_read);
3207
b029bc9b 3208static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3209{
1da177e4
LT		 3210 struct inode *inode = data->inode;
3211
9e33bed5 3212 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3213 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3214 return -EAGAIN;
1da177e4 3215 }
4f9838c7 3216 if (task->tk_status >= 0) {
1da177e4 3217 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3218 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3219 }
788e7a89 3220 return 0;
1da177e4
LT		 3221}
3222
b029bc9b
FI		 3223static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3224{
3225 if (!nfs4_sequence_done(task, &data->res.seq_res))
3226 return -EAGAIN;
3227 return data->write_done_cb(task, data);
3228}
3229
a69aef14
FI		 3230/* Reset the the nfs_write_data to send the write to the MDS. */
3231void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3232{
3233 dprintk("%s Reset task for i/o through\n", __func__);
3234 put_lseg(data->lseg);
3235 data->lseg = NULL;
3236 data->ds_clp = NULL;
3237 data->write_done_cb = nfs4_write_done_cb;
3238 data->args.fh = NFS_FH(data->inode);
3239 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3240 data->args.offset = data->mds_offset;
3241 data->res.fattr = &data->fattr;
3242 task->tk_ops = data->mds_ops;
3243 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3244}
3245EXPORT_SYMBOL_GPL(nfs4_reset_write);
3246
bdc7f021 3247static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3248{
bdc7f021
TM		 3249 struct nfs_server *server = NFS_SERVER(data->inode);
3250
7ffd1064
FI		 3251 if (data->lseg) {
3252 data->args.bitmask = NULL;
3253 data->res.fattr = NULL;
3254 } else
3255 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3256 if (!data->write_done_cb)
3257 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3258 data->res.server = server;
1da177e4
LT		 3259 data->timestamp = jiffies;
3260
bdc7f021 3261 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3262}
3263
5f452431 3264static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3265{
1da177e4 3266 struct inode *inode = data->inode;
14516c3a 3267
9e33bed5 3268 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3269 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3270 return -EAGAIN;
1da177e4 3271 }
9e08a3c5 3272 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3273 return 0;
1da177e4
LT		 3274}
3275
5f452431
FI		 3276static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3277{
3278 if (!nfs4_sequence_done(task, &data->res.seq_res))
3279 return -EAGAIN;
3280 return data->write_done_cb(task, data);
3281}
3282
bdc7f021 3283static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3284{
788e7a89 3285 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3286
3287 if (data->lseg) {
3288 data->args.bitmask = NULL;
3289 data->res.fattr = NULL;
3290 } else
3291 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3292 if (!data->write_done_cb)
3293 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3294 data->res.server = server;
bdc7f021 3295 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3296}
3297
9bc4e3ca
CL		 3298struct nfs4_renewdata {
3299 struct nfs_client *client;
3300 unsigned long timestamp;
3301};
3302
1da177e4
LT		 3303/*
3304 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3305 * standalone procedure for queueing an asynchronous RENEW.
3306 */
9bc4e3ca 3307static void nfs4_renew_release(void *calldata)
dc96aef9 3308{
9bc4e3ca
CL		 3309 struct nfs4_renewdata *data = calldata;
3310 struct nfs_client *clp = data->client;
dc96aef9 3311
0851de06
AB		 3312 if (atomic_read(&clp->cl_count) > 1)
3313 nfs4_schedule_state_renewal(clp);
3314 nfs_put_client(clp);
9bc4e3ca 3315 kfree(data);
dc96aef9
AB		 3316}
3317
9bc4e3ca 3318static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3319{
9bc4e3ca
CL		 3320 struct nfs4_renewdata *data = calldata;
3321 struct nfs_client *clp = data->client;
3322 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3323
3324 if (task->tk_status < 0) {
95baa25c
TM		 3325 /* Unless we're shutting down, schedule state recovery! */
3326 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3327 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3328 return;
3329 }
452e9352 3330 do_renew_lease(clp, timestamp);
1da177e4
LT		 3331}
3332
963d8fe5
TM		 3333static const struct rpc_call_ops nfs4_renew_ops = {
3334 .rpc_call_done = nfs4_renew_done,
dc96aef9 3335 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3336};
3337
adfa6f98 3338int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3339{
3340 struct rpc_message msg = {
3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3342 .rpc_argp = clp,
b4454fe1 3343 .rpc_cred = cred,
1da177e4 3344 };
9bc4e3ca 3345 struct nfs4_renewdata *data;
1da177e4 3346
0851de06
AB		 3347 if (!atomic_inc_not_zero(&clp->cl_count))
3348 return -EIO;
9bc4e3ca
CL		 3349 data = kmalloc(sizeof(*data), GFP_KERNEL);
3350 if (data == NULL)
3351 return -ENOMEM;
3352 data->client = clp;
3353 data->timestamp = jiffies;
1da177e4 3354 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3355 &nfs4_renew_ops, data);
1da177e4
LT		 3356}
3357
adfa6f98 3358int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3359{
3360 struct rpc_message msg = {
3361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3362 .rpc_argp = clp,
b4454fe1 3363 .rpc_cred = cred,
1da177e4
LT		 3364 };
3365 unsigned long now = jiffies;
3366 int status;
3367
3368 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3369 if (status < 0)
3370 return status;
452e9352 3371 do_renew_lease(clp, now);
1da177e4
LT		 3372 return 0;
3373}
3374
aa1870af
BF		 3375static inline int nfs4_server_supports_acls(struct nfs_server *server)
3376{
3377 return (server->caps & NFS_CAP_ACLS)
3378 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3379 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3380}
3381
3382/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3383 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3384 * the stack.
3385 */
3386#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3387
3388static void buf_to_pages(const void *buf, size_t buflen,
3389 struct page **pages, unsigned int *pgbase)
3390{
3391 const void *p = buf;
3392
3393 *pgbase = offset_in_page(buf);
3394 p -= *pgbase;
3395 while (p < buf + buflen) {
3396 *(pages++) = virt_to_page(p);
3397 p += PAGE_CACHE_SIZE;
3398 }
3399}
3400
e9e3d724
NH		 3401static int buf_to_pages_noslab(const void *buf, size_t buflen,
3402 struct page **pages, unsigned int *pgbase)
3403{
3404 struct page *newpage, **spages;
3405 int rc = 0;
3406 size_t len;
3407 spages = pages;
3408
3409 do {
43b7c3f0 3410 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3411 newpage = alloc_page(GFP_KERNEL);
3412
3413 if (newpage == NULL)
3414 goto unwind;
3415 memcpy(page_address(newpage), buf, len);
3416 buf += len;
3417 buflen -= len;
3418 *pages++ = newpage;
3419 rc++;
3420 } while (buflen != 0);
3421
3422 return rc;
3423
3424unwind:
3425 for(; rc > 0; rc--)
3426 __free_page(spages[rc-1]);
3427 return -ENOMEM;
3428}
3429
e50a1c2e
BF		 3430struct nfs4_cached_acl {
3431 int cached;
3432 size_t len;
3e9d4154 3433 char data[0];
e50a1c2e
BF		 3434};
3435
3436static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3437{
3438 struct nfs_inode *nfsi = NFS_I(inode);
3439
3440 spin_lock(&inode->i_lock);
3441 kfree(nfsi->nfs4_acl);
3442 nfsi->nfs4_acl = acl;
3443 spin_unlock(&inode->i_lock);
3444}
3445
3446static void nfs4_zap_acl_attr(struct inode *inode)
3447{
3448 nfs4_set_cached_acl(inode, NULL);
3449}
3450
3451static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3452{
3453 struct nfs_inode *nfsi = NFS_I(inode);
3454 struct nfs4_cached_acl *acl;
3455 int ret = -ENOENT;
3456
3457 spin_lock(&inode->i_lock);
3458 acl = nfsi->nfs4_acl;
3459 if (acl == NULL)
3460 goto out;
3461 if (buf == NULL) /* user is just asking for length */
3462 goto out_len;
3463 if (acl->cached == 0)
3464 goto out;
3465 ret = -ERANGE; /* see getxattr(2) man page */
3466 if (acl->len > buflen)
3467 goto out;
3468 memcpy(buf, acl->data, acl->len);
3469out_len:
3470 ret = acl->len;
3471out:
3472 spin_unlock(&inode->i_lock);
3473 return ret;
3474}
3475
3476static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3477{
3478 struct nfs4_cached_acl *acl;
3479
3480 if (buf && acl_len <= PAGE_SIZE) {
3481 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3482 if (acl == NULL)
3483 goto out;
3484 acl->cached = 1;
3485 memcpy(acl->data, buf, acl_len);
3486 } else {
3487 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3488 if (acl == NULL)
3489 goto out;
3490 acl->cached = 0;
3491 }
3492 acl->len = acl_len;
3493out:
3494 nfs4_set_cached_acl(inode, acl);
3495}
3496
16b4289c 3497static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3498{
aa1870af
BF		 3499 struct page *pages[NFS4ACL_MAXPAGES];
3500 struct nfs_getaclargs args = {
3501 .fh = NFS_FH(inode),
3502 .acl_pages = pages,
3503 .acl_len = buflen,
3504 };
663c79b3
BH		 3505 struct nfs_getaclres res = {
3506 .acl_len = buflen,
3507 };
e50a1c2e 3508 void *resp_buf;
aa1870af
BF		 3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3511 .rpc_argp = &args,
663c79b3 3512 .rpc_resp = &res,
aa1870af 3513 };
e50a1c2e 3514 struct page *localpage = NULL;
aa1870af
BF		 3515 int ret;
3516
e50a1c2e
BF		 3517 if (buflen < PAGE_SIZE) {
3518 /* As long as we're doing a round trip to the server anyway,
3519 * let's be prepared for a page of acl data. */
3520 localpage = alloc_page(GFP_KERNEL);
3521 resp_buf = page_address(localpage);
3522 if (localpage == NULL)
3523 return -ENOMEM;
3524 args.acl_pages[0] = localpage;
3525 args.acl_pgbase = 0;
663c79b3 3526 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3527 } else {
3528 resp_buf = buf;
3529 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3530 }
7c513058 3531 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3532 if (ret)
3533 goto out_free;
663c79b3
BH		 3534 if (res.acl_len > args.acl_len)
3535 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3536 else
663c79b3 3537 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3538 if (buf) {
3539 ret = -ERANGE;
663c79b3 3540 if (res.acl_len > buflen)
e50a1c2e
BF		 3541 goto out_free;
3542 if (localpage)
663c79b3 3543 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3544 }
663c79b3 3545 ret = res.acl_len;
e50a1c2e
BF		 3546out_free:
3547 if (localpage)
3548 __free_page(localpage);
aa1870af
BF		 3549 return ret;
3550}
3551
16b4289c
TM		 3552static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3553{
3554 struct nfs4_exception exception = { };
3555 ssize_t ret;
3556 do {
3557 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3558 if (ret >= 0)
3559 break;
3560 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3561 } while (exception.retry);
3562 return ret;
3563}
3564
e50a1c2e
BF		 3565static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3566{
3567 struct nfs_server *server = NFS_SERVER(inode);
3568 int ret;
3569
3570 if (!nfs4_server_supports_acls(server))
3571 return -EOPNOTSUPP;
3572 ret = nfs_revalidate_inode(server, inode);
3573 if (ret < 0)
3574 return ret;
08a22b39
AK		 3575 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3576 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3577 ret = nfs4_read_cached_acl(inode, buf, buflen);
3578 if (ret != -ENOENT)
3579 return ret;
3580 return nfs4_get_acl_uncached(inode, buf, buflen);
3581}
3582
16b4289c 3583static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3584{
3585 struct nfs_server *server = NFS_SERVER(inode);
3586 struct page *pages[NFS4ACL_MAXPAGES];
3587 struct nfs_setaclargs arg = {
3588 .fh = NFS_FH(inode),
3589 .acl_pages = pages,
3590 .acl_len = buflen,
3591 };
73c403a9 3592 struct nfs_setaclres res;
4b580ee3
BF		 3593 struct rpc_message msg = {
3594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3595 .rpc_argp = &arg,
73c403a9 3596 .rpc_resp = &res,
4b580ee3 3597 };
e9e3d724 3598 int ret, i;
4b580ee3
BF		 3599
3600 if (!nfs4_server_supports_acls(server))
3601 return -EOPNOTSUPP;
e9e3d724
NH		 3602 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3603 if (i < 0)
3604 return i;
642ac549 3605 nfs_inode_return_delegation(inode);
7c513058 3606 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3607
3608 /*
3609 * Free each page after tx, so the only ref left is
3610 * held by the network stack
3611 */
3612 for (; i > 0; i--)
3613 put_page(pages[i-1]);
3614
08a22b39
AK		 3615 /*
3616 * Acl update can result in inode attribute update.
3617 * so mark the attribute cache invalid.
3618 */
3619 spin_lock(&inode->i_lock);
3620 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3621 spin_unlock(&inode->i_lock);
f41f7418
TM		 3622 nfs_access_zap_cache(inode);
3623 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3624 return ret;
3625}
3626
16b4289c
TM		 3627static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3628{
3629 struct nfs4_exception exception = { };
3630 int err;
3631 do {
3632 err = nfs4_handle_exception(NFS_SERVER(inode),
3633 __nfs4_proc_set_acl(inode, buf, buflen),
3634 &exception);
3635 } while (exception.retry);
3636 return err;
3637}
3638
1da177e4 3639static int
aa5190d0 3640nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3641{
aa5190d0
TM		 3642 struct nfs_client *clp = server->nfs_client;
3643
3644 if (task->tk_status >= 0)
1da177e4
LT		 3645 return 0;
3646 switch(task->tk_status) {
9e33bed5
TM		 3647 case -NFS4ERR_ADMIN_REVOKED:
3648 case -NFS4ERR_BAD_STATEID:
3649 case -NFS4ERR_OPENMODE:
3650 if (state == NULL)
3651 break;
0400a6b0
TM		 3652 nfs4_schedule_stateid_recovery(server, state);
3653 goto wait_on_recovery;
1da177e4 3654 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3655 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3656 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3657 nfs4_schedule_lease_recovery(clp);
3658 goto wait_on_recovery;
4745e315
AA		 3659#if defined(CONFIG_NFS_V4_1)
3660 case -NFS4ERR_BADSESSION:
3661 case -NFS4ERR_BADSLOT:
3662 case -NFS4ERR_BAD_HIGH_SLOT:
3663 case -NFS4ERR_DEADSESSION:
3664 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3665 case -NFS4ERR_SEQ_FALSE_RETRY:
3666 case -NFS4ERR_SEQ_MISORDERED:
3667 dprintk("%s ERROR %d, Reset session\n", __func__,
3668 task->tk_status);
0400a6b0 3669 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3670 task->tk_status = 0;
3671 return -EAGAIN;
3672#endif /* CONFIG_NFS_V4_1 */
1da177e4 3673 case -NFS4ERR_DELAY:
aa5190d0 3674 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3675 case -NFS4ERR_GRACE:
2c643488 3676 case -EKEYEXPIRED:
1da177e4
LT		 3677 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3678 task->tk_status = 0;
3679 return -EAGAIN;
3680 case -NFS4ERR_OLD_STATEID:
3681 task->tk_status = 0;
3682 return -EAGAIN;
3683 }
3684 task->tk_status = nfs4_map_errors(task->tk_status);
3685 return 0;
0400a6b0 3686wait_on_recovery:
a2c0b9e2 3687 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3688 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3689 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3690 task->tk_status = 0;
3691 return -EAGAIN;
1da177e4
LT		 3692}
3693
bb8b27e5
TM		 3694int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3695 unsigned short port, struct rpc_cred *cred,
3696 struct nfs4_setclientid_res *res)
1da177e4
LT		 3697{
3698 nfs4_verifier sc_verifier;
3699 struct nfs4_setclientid setclientid = {
3700 .sc_verifier = &sc_verifier,
3701 .sc_prog = program,
f4eecd5d 3702 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3703 };
3704 struct rpc_message msg = {
3705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3706 .rpc_argp = &setclientid,
bb8b27e5 3707 .rpc_resp = res,
286d7d6a 3708 .rpc_cred = cred,
1da177e4 3709 };
bc4785cd 3710 __be32 *p;
1da177e4
LT		 3711 int loop = 0;
3712 int status;
3713
bc4785cd 3714 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3715 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3716 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3717
3718 for(;;) {
3719 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3720 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3721 clp->cl_ipaddr,
3722 rpc_peeraddr2str(clp->cl_rpcclient,
3723 RPC_DISPLAY_ADDR),
69dd716c
TM		 3724 rpc_peeraddr2str(clp->cl_rpcclient,
3725 RPC_DISPLAY_PROTO),
78ea323b 3726 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3727 clp->cl_id_uniquifier);
3728 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3729 sizeof(setclientid.sc_netid),
3730 rpc_peeraddr2str(clp->cl_rpcclient,
3731 RPC_DISPLAY_NETID));
1da177e4 3732 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3733 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3734 clp->cl_ipaddr, port >> 8, port & 255);
3735
3736 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3737 if (status != -NFS4ERR_CLID_INUSE)
3738 break;
3739 if (signalled())
3740 break;
3741 if (loop++ & 1)
611c96c8 3742 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3743 else
3744 if (++clp->cl_id_uniquifier == 0)
3745 break;
3746 }
3747 return status;
3748}
3749
bb8b27e5
TM		 3750static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3751 struct nfs4_setclientid_res *arg,
3752 struct rpc_cred *cred)
1da177e4
LT		 3753{
3754 struct nfs_fsinfo fsinfo;
3755 struct rpc_message msg = {
3756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3757 .rpc_argp = arg,
1da177e4 3758 .rpc_resp = &fsinfo,
286d7d6a 3759 .rpc_cred = cred,
1da177e4
LT		 3760 };
3761 unsigned long now;
3762 int status;
3763
3764 now = jiffies;
3765 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3766 if (status == 0) {
3767 spin_lock(&clp->cl_lock);
3768 clp->cl_lease_time = fsinfo.lease_time * HZ;
3769 clp->cl_last_renewal = now;
3770 spin_unlock(&clp->cl_lock);
3771 }
3772 return status;
3773}
3774
bb8b27e5
TM		 3775int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3776 struct nfs4_setclientid_res *arg,
3777 struct rpc_cred *cred)
51581f3b 3778{
77e03677 3779 long timeout = 0;
51581f3b
TM		 3780 int err;
3781 do {
bb8b27e5 3782 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3783 switch (err) {
3784 case 0:
3785 return err;
3786 case -NFS4ERR_RESOURCE:
3787 /* The IBM lawyers misread another document! */
3788 case -NFS4ERR_DELAY:
3789 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3790 }
3791 } while (err == 0);
3792 return err;
3793}
3794
fe650407
TM		 3795struct nfs4_delegreturndata {
3796 struct nfs4_delegreturnargs args;
fa178f29 3797 struct nfs4_delegreturnres res;
fe650407
TM		 3798 struct nfs_fh fh;
3799 nfs4_stateid stateid;
26e976a8 3800 unsigned long timestamp;
fa178f29 3801 struct nfs_fattr fattr;
fe650407
TM		 3802 int rpc_status;
3803};
3804
fe650407
TM		 3805static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3806{
3807 struct nfs4_delegreturndata *data = calldata;
938e1010 3808
14516c3a
TM		 3809 if (!nfs4_sequence_done(task, &data->res.seq_res))
3810 return;
938e1010 3811
79708861
RL		 3812 switch (task->tk_status) {
3813 case -NFS4ERR_STALE_STATEID:
3814 case -NFS4ERR_EXPIRED:
3815 case 0:
fa178f29 3816 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3817 break;
3818 default:
3819 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3820 -EAGAIN) {
3821 nfs_restart_rpc(task, data->res.server->nfs_client);
3822 return;
3823 }
3824 }
3825 data->rpc_status = task->tk_status;
fe650407
TM		 3826}
3827
3828static void nfs4_delegreturn_release(void *calldata)
3829{
fe650407
TM		 3830 kfree(calldata);
3831}
3832
938e1010
AA		 3833#if defined(CONFIG_NFS_V4_1)
3834static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3835{
3836 struct nfs4_delegreturndata *d_data;
3837
3838 d_data = (struct nfs4_delegreturndata *)data;
3839
035168ab 3840 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3841 &d_data->args.seq_args,
3842 &d_data->res.seq_res, 1, task))
3843 return;
3844 rpc_call_start(task);
3845}
3846#endif /* CONFIG_NFS_V4_1 */
3847
c8d149f3 3848static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3849#if defined(CONFIG_NFS_V4_1)
3850 .rpc_call_prepare = nfs4_delegreturn_prepare,
3851#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3852 .rpc_call_done = nfs4_delegreturn_done,
3853 .rpc_release = nfs4_delegreturn_release,
3854};
3855
e6f81075 3856static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3857{
3858 struct nfs4_delegreturndata *data;
fa178f29 3859 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3860 struct rpc_task *task;
5138fde0
TM		 3861 struct rpc_message msg = {
3862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3863 .rpc_cred = cred,
3864 };
c970aa85
TM		 3865 struct rpc_task_setup task_setup_data = {
3866 .rpc_client = server->client,
5138fde0 3867 .rpc_message = &msg,
c970aa85
TM		 3868 .callback_ops = &nfs4_delegreturn_ops,
3869 .flags = RPC_TASK_ASYNC,
3870 };
e6f81075 3871 int status = 0;
fe650407 3872
8535b2be 3873 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3874 if (data == NULL)
3875 return -ENOMEM;
3876 data->args.fhandle = &data->fh;
3877 data->args.stateid = &data->stateid;
fa178f29 3878 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3879 nfs_copy_fh(&data->fh, NFS_FH(inode));
3880 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3881 data->res.fattr = &data->fattr;
3882 data->res.server = server;
5138fde0 3883 nfs_fattr_init(data->res.fattr);
26e976a8 3884 data->timestamp = jiffies;
fe650407
TM		 3885 data->rpc_status = 0;
3886
c970aa85 3887 task_setup_data.callback_data = data;
1174dd1f
TM		 3888 msg.rpc_argp = &data->args;
3889 msg.rpc_resp = &data->res;
c970aa85 3890 task = rpc_run_task(&task_setup_data);
7a1218a2 3891 if (IS_ERR(task))
fe650407 3892 return PTR_ERR(task);
e6f81075
TM		 3893 if (!issync)
3894 goto out;
fe650407 3895 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3896 if (status != 0)
3897 goto out;
3898 status = data->rpc_status;
3899 if (status != 0)
3900 goto out;
3901 nfs_refresh_inode(inode, &data->fattr);
3902out:
e6b3c4db 3903 rpc_put_task(task);
fe650407 3904 return status;
1da177e4
LT		 3905}
3906
e6f81075 3907int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3908{
3909 struct nfs_server *server = NFS_SERVER(inode);
3910 struct nfs4_exception exception = { };
3911 int err;
3912 do {
e6f81075 3913 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3914 switch (err) {
3915 case -NFS4ERR_STALE_STATEID:
3916 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3917 case 0:
3918 return 0;
3919 }
3920 err = nfs4_handle_exception(server, err, &exception);
3921 } while (exception.retry);
3922 return err;
3923}
3924
3925#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3926#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3927
3928/*
3929 * sleep, with exponential backoff, and retry the LOCK operation.
3930 */
3931static unsigned long
3932nfs4_set_lock_task_retry(unsigned long timeout)
3933{
150030b7 3934 schedule_timeout_killable(timeout);
1da177e4
LT		 3935 timeout <<= 1;
3936 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3937 return NFS4_LOCK_MAXTIMEOUT;
3938 return timeout;
3939}
3940
1da177e4
LT		 3941static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3942{
3943 struct inode *inode = state->inode;
3944 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3945 struct nfs_client *clp = server->nfs_client;
911d1aaf 3946 struct nfs_lockt_args arg = {
1da177e4 3947 .fh = NFS_FH(inode),
911d1aaf 3948 .fl = request,
1da177e4 3949 };
911d1aaf
TM		 3950 struct nfs_lockt_res res = {
3951 .denied = request,
1da177e4
LT		 3952 };
3953 struct rpc_message msg = {
3954 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3955 .rpc_argp = &arg,
3956 .rpc_resp = &res,
3957 .rpc_cred = state->owner->so_cred,
3958 };
1da177e4
LT		 3959 struct nfs4_lock_state *lsp;
3960 int status;
3961
911d1aaf 3962 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3963 status = nfs4_set_lock_state(state, request);
3964 if (status != 0)
3965 goto out;
3966 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3967 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3968 arg.lock_owner.s_dev = server->s_dev;
7c513058 3969 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 3970 switch (status) {
3971 case 0:
3972 request->fl_type = F_UNLCK;
3973 break;
3974 case -NFS4ERR_DENIED:
3975 status = 0;
1da177e4 3976 }
70cc6487 3977 request->fl_ops->fl_release_private(request);
8d0a8a9d 3978out:
1da177e4
LT		 3979 return status;
3980}
3981
3982static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3983{
3984 struct nfs4_exception exception = { };
3985 int err;
3986
3987 do {
3988 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3989 _nfs4_proc_getlk(state, cmd, request),
3990 &exception);
3991 } while (exception.retry);
3992 return err;
3993}
3994
3995static int do_vfs_lock(struct file *file, struct file_lock *fl)
3996{
3997 int res = 0;
3998 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3999 case FL_POSIX:
4000 res = posix_lock_file_wait(file, fl);
4001 break;
4002 case FL_FLOCK:
4003 res = flock_lock_file_wait(file, fl);
4004 break;
4005 default:
4006 BUG();
4007 }
1da177e4
LT		 4008 return res;
4009}
4010
faf5f49c 4011struct nfs4_unlockdata {
911d1aaf
TM		 4012 struct nfs_locku_args arg;
4013 struct nfs_locku_res res;
faf5f49c
TM		 4014 struct nfs4_lock_state *lsp;
4015 struct nfs_open_context *ctx;
911d1aaf
TM		 4016 struct file_lock fl;
4017 const struct nfs_server *server;
26e976a8 4018 unsigned long timestamp;
faf5f49c
TM		 4019};
4020
911d1aaf
TM		 4021static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4022 struct nfs_open_context *ctx,
4023 struct nfs4_lock_state *lsp,
4024 struct nfs_seqid *seqid)
4025{
4026 struct nfs4_unlockdata *p;
4027 struct inode *inode = lsp->ls_state->inode;
4028
8535b2be 4029 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4030 if (p == NULL)
4031 return NULL;
4032 p->arg.fh = NFS_FH(inode);
4033 p->arg.fl = &p->fl;
4034 p->arg.seqid = seqid;
c1d51931 4035 p->res.seqid = seqid;
911d1aaf
TM		 4036 p->arg.stateid = &lsp->ls_stateid;
4037 p->lsp = lsp;
4038 atomic_inc(&lsp->ls_count);
4039 /* Ensure we don't close file until we're done freeing locks! */
4040 p->ctx = get_nfs_open_context(ctx);
4041 memcpy(&p->fl, fl, sizeof(p->fl));
4042 p->server = NFS_SERVER(inode);
4043 return p;
4044}
4045
06f814a3 4046static void nfs4_locku_release_calldata(void *data)
faf5f49c 4047{
963d8fe5 4048 struct nfs4_unlockdata *calldata = data;
911d1aaf 4049 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4050 nfs4_put_lock_state(calldata->lsp);
4051 put_nfs_open_context(calldata->ctx);
4052 kfree(calldata);
faf5f49c
TM		 4053}
4054
963d8fe5 4055static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4056{
963d8fe5 4057 struct nfs4_unlockdata *calldata = data;
faf5f49c 4058
14516c3a
TM		 4059 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4060 return;
faf5f49c
TM		 4061 switch (task->tk_status) {
4062 case 0:
4063 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4064 calldata->res.stateid.data,
faf5f49c 4065 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4066 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4067 break;
9e33bed5
TM		 4068 case -NFS4ERR_BAD_STATEID:
4069 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4070 case -NFS4ERR_STALE_STATEID:
4071 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4072 break;
4073 default:
9e33bed5 4074 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4075 nfs_restart_rpc(task,
d61e612a 4076 calldata->server->nfs_client);
faf5f49c 4077 }
faf5f49c
TM		 4078}
4079
4ce70ada 4080static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4081{
4ce70ada 4082 struct nfs4_unlockdata *calldata = data;
faf5f49c 4083
911d1aaf 4084 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4085 return;
4086 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4087 /* Note: exit _without_ running nfs4_locku_done */
4088 task->tk_action = NULL;
faf5f49c
TM		 4089 return;
4090 }
26e976a8 4091 calldata->timestamp = jiffies;
035168ab 4092 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4093 &calldata->arg.seq_args,
4094 &calldata->res.seq_res, 1, task))
4095 return;
5138fde0 4096 rpc_call_start(task);
faf5f49c
TM		 4097}
4098
963d8fe5 4099static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4100 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4101 .rpc_call_done = nfs4_locku_done,
06f814a3 4102 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4103};
4104
a5d16a4d
TM		 4105static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4106 struct nfs_open_context *ctx,
4107 struct nfs4_lock_state *lsp,
4108 struct nfs_seqid *seqid)
4109{
4110 struct nfs4_unlockdata *data;
5138fde0
TM		 4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4113 .rpc_cred = ctx->cred,
4114 };
c970aa85
TM		 4115 struct rpc_task_setup task_setup_data = {
4116 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4117 .rpc_message = &msg,
c970aa85 4118 .callback_ops = &nfs4_locku_ops,
101070ca 4119 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4120 .flags = RPC_TASK_ASYNC,
4121 };
a5d16a4d 4122
137d6aca
FF		 4123 /* Ensure this is an unlock - when canceling a lock, the
4124 * canceled lock is passed in, and it won't be an unlock.
4125 */
4126 fl->fl_type = F_UNLCK;
4127
a5d16a4d
TM		 4128 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4129 if (data == NULL) {
4130 nfs_free_seqid(seqid);
4131 return ERR_PTR(-ENOMEM);
4132 }
4133
1174dd1f
TM		 4134 msg.rpc_argp = &data->arg;
4135 msg.rpc_resp = &data->res;
c970aa85
TM		 4136 task_setup_data.callback_data = data;
4137 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4138}
4139
faf5f49c
TM		 4140static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4141{
19e03c57 4142 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4143 struct nfs_seqid *seqid;
1da177e4 4144 struct nfs4_lock_state *lsp;
06f814a3
TM		 4145 struct rpc_task *task;
4146 int status = 0;
536ff0f8 4147 unsigned char fl_flags = request->fl_flags;
faf5f49c 4148
8d0a8a9d 4149 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4150 /* Unlock _before_ we do the RPC call */
4151 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4152 down_read(&nfsi->rwsem);
4153 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4154 up_read(&nfsi->rwsem);
9b073574 4155 goto out;
19e03c57
TM		 4156 }
4157 up_read(&nfsi->rwsem);
8d0a8a9d 4158 if (status != 0)
9b073574
TM		 4159 goto out;
4160 /* Is this a delegated lock? */
4161 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4162 goto out;
8d0a8a9d 4163 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4164 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4165 status = -ENOMEM;
911d1aaf 4166 if (seqid == NULL)
9b073574 4167 goto out;
cd3758e3 4168 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4169 status = PTR_ERR(task);
4170 if (IS_ERR(task))
9b073574 4171 goto out;
a5d16a4d 4172 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4173 rpc_put_task(task);
9b073574 4174out:
536ff0f8 4175 request->fl_flags = fl_flags;
1da177e4
LT		 4176 return status;
4177}
4178
a5d16a4d
TM		 4179struct nfs4_lockdata {
4180 struct nfs_lock_args arg;
4181 struct nfs_lock_res res;
4182 struct nfs4_lock_state *lsp;
4183 struct nfs_open_context *ctx;
4184 struct file_lock fl;
26e976a8 4185 unsigned long timestamp;
a5d16a4d
TM		 4186 int rpc_status;
4187 int cancelled;
66179efe 4188 struct nfs_server *server;
a5d16a4d
TM		 4189};
4190
4191static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4192 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4193 gfp_t gfp_mask)
1da177e4 4194{
a5d16a4d
TM		 4195 struct nfs4_lockdata *p;
4196 struct inode *inode = lsp->ls_state->inode;
1da177e4 4197 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4198
8535b2be 4199 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4200 if (p == NULL)
4201 return NULL;
4202
4203 p->arg.fh = NFS_FH(inode);
4204 p->arg.fl = &p->fl;
8535b2be 4205 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4206 if (p->arg.open_seqid == NULL)
4207 goto out_free;
8535b2be 4208 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4209 if (p->arg.lock_seqid == NULL)
2f74c0a0 4210 goto out_free_seqid;
a5d16a4d 4211 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4212 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4213 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4214 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4215 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4216 p->lsp = lsp;
66179efe 4217 p->server = server;
a5d16a4d
TM		 4218 atomic_inc(&lsp->ls_count);
4219 p->ctx = get_nfs_open_context(ctx);
4220 memcpy(&p->fl, fl, sizeof(p->fl));
4221 return p;
2f74c0a0
TM		 4222out_free_seqid:
4223 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4224out_free:
4225 kfree(p);
4226 return NULL;
4227}
4228
4229static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4230{
4231 struct nfs4_lockdata *data = calldata;
4232 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4233
3110ff80 4234 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4235 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4236 return;
a5d16a4d
TM		 4237 /* Do we need to do an open_to_lock_owner? */
4238 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4239 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4240 return;
a5d16a4d
TM		 4241 data->arg.open_stateid = &state->stateid;
4242 data->arg.new_lock_owner = 1;
c1d51931 4243 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4244 } else
4245 data->arg.new_lock_owner = 0;
26e976a8 4246 data->timestamp = jiffies;
035168ab
TM		 4247 if (nfs4_setup_sequence(data->server,
4248 &data->arg.seq_args,
66179efe
AA		 4249 &data->res.seq_res, 1, task))
4250 return;
5138fde0 4251 rpc_call_start(task);
3110ff80 4252 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4253}
4254
b257957e
AB		 4255static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4256{
4257 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4258 nfs4_lock_prepare(task, calldata);
4259}
4260
a5d16a4d
TM		 4261static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4262{
4263 struct nfs4_lockdata *data = calldata;
4264
3110ff80 4265 dprintk("%s: begin!\n", __func__);
a5d16a4d 4266
14516c3a
TM		 4267 if (!nfs4_sequence_done(task, &data->res.seq_res))
4268 return;
66179efe 4269
a5d16a4d 4270 data->rpc_status = task->tk_status;
a5d16a4d 4271 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4272 if (data->rpc_status == 0)
4273 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4274 else
4275 goto out;
4276 }
4277 if (data->rpc_status == 0) {
4278 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4279 sizeof(data->lsp->ls_stateid.data));
4280 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4281 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4282 }
a5d16a4d 4283out:
3110ff80 4284 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4285}
4286
4287static void nfs4_lock_release(void *calldata)
4288{
4289 struct nfs4_lockdata *data = calldata;
4290
3110ff80 4291 dprintk("%s: begin!\n", __func__);
2f74c0a0 4292 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4293 if (data->cancelled != 0) {
4294 struct rpc_task *task;
4295 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4296 data->arg.lock_seqid);
4297 if (!IS_ERR(task))
bf294b41 4298 rpc_put_task_async(task);
3110ff80 4299 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4300 } else
4301 nfs_free_seqid(data->arg.lock_seqid);
4302 nfs4_put_lock_state(data->lsp);
4303 put_nfs_open_context(data->ctx);
4304 kfree(data);
3110ff80 4305 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4306}
4307
4308static const struct rpc_call_ops nfs4_lock_ops = {
4309 .rpc_call_prepare = nfs4_lock_prepare,
4310 .rpc_call_done = nfs4_lock_done,
4311 .rpc_release = nfs4_lock_release,
4312};
4313
b257957e
AB		 4314static const struct rpc_call_ops nfs4_recover_lock_ops = {
4315 .rpc_call_prepare = nfs4_recover_lock_prepare,
4316 .rpc_call_done = nfs4_lock_done,
4317 .rpc_release = nfs4_lock_release,
4318};
4319
2bee72a6
TM		 4320static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4321{
2bee72a6
TM		 4322 switch (error) {
4323 case -NFS4ERR_ADMIN_REVOKED:
4324 case -NFS4ERR_BAD_STATEID:
ecac799a 4325 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4326 if (new_lock_owner != 0 ||
4327 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4328 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4329 break;
4330 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4331 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4332 case -NFS4ERR_EXPIRED:
4333 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4334 };
4335}
4336
afe6c27c 4337static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4338{
4339 struct nfs4_lockdata *data;
4340 struct rpc_task *task;
5138fde0
TM		 4341 struct rpc_message msg = {
4342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4343 .rpc_cred = state->owner->so_cred,
4344 };
c970aa85
TM		 4345 struct rpc_task_setup task_setup_data = {
4346 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4347 .rpc_message = &msg,
c970aa85 4348 .callback_ops = &nfs4_lock_ops,
101070ca 4349 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4350 .flags = RPC_TASK_ASYNC,
4351 };
a5d16a4d
TM		 4352 int ret;
4353
3110ff80 4354 dprintk("%s: begin!\n", __func__);
cd3758e3 4355 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4356 fl->fl_u.nfs4_fl.owner,
4357 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4358 if (data == NULL)
4359 return -ENOMEM;
4360 if (IS_SETLKW(cmd))
4361 data->arg.block = 1;
b257957e
AB		 4362 if (recovery_type > NFS_LOCK_NEW) {
4363 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4364 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4365 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4366 }
1174dd1f
TM		 4367 msg.rpc_argp = &data->arg;
4368 msg.rpc_resp = &data->res;
c970aa85
TM		 4369 task_setup_data.callback_data = data;
4370 task = rpc_run_task(&task_setup_data);
7a1218a2 4371 if (IS_ERR(task))
a5d16a4d 4372 return PTR_ERR(task);
a5d16a4d
TM		 4373 ret = nfs4_wait_for_completion_rpc_task(task);
4374 if (ret == 0) {
4375 ret = data->rpc_status;
2bee72a6
TM		 4376 if (ret)
4377 nfs4_handle_setlk_error(data->server, data->lsp,
4378 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4379 } else
4380 data->cancelled = 1;
e6b3c4db 4381 rpc_put_task(task);
3110ff80 4382 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4383 return ret;
1da177e4
LT		 4384}
4385
4386static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4387{
202b50dc
TM		 4388 struct nfs_server *server = NFS_SERVER(state->inode);
4389 struct nfs4_exception exception = { };
4390 int err;
4391
4392 do {
42a2d13e
TM		 4393 /* Cache the lock if possible... */
4394 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4395 return 0;
afe6c27c 4396 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4397 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4398 break;
4399 nfs4_handle_exception(server, err, &exception);
4400 } while (exception.retry);
4401 return err;
1da177e4
LT		 4402}
4403
4404static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4405{
202b50dc
TM		 4406 struct nfs_server *server = NFS_SERVER(state->inode);
4407 struct nfs4_exception exception = { };
4408 int err;
4409
6bfc93ef
TM		 4410 err = nfs4_set_lock_state(state, request);
4411 if (err != 0)
4412 return err;
202b50dc 4413 do {
42a2d13e
TM		 4414 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4415 return 0;
afe6c27c 4416 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4417 switch (err) {
4418 default:
4419 goto out;
4420 case -NFS4ERR_GRACE:
4421 case -NFS4ERR_DELAY:
4422 nfs4_handle_exception(server, err, &exception);
4423 err = 0;
4424 }
202b50dc 4425 } while (exception.retry);
a9ed2e25 4426out:
202b50dc 4427 return err;
1da177e4
LT		 4428}
4429
4430static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4431{
19e03c57 4432 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4433 unsigned char fl_flags = request->fl_flags;
8e469ebd 4434 int status = -ENOLCK;
1da177e4 4435
8e469ebd
TM		 4436 if ((fl_flags & FL_POSIX) &&
4437 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4438 goto out;
6bfc93ef 4439 /* Is this a delegated open? */
6bfc93ef
TM		 4440 status = nfs4_set_lock_state(state, request);
4441 if (status != 0)
4442 goto out;
01c3b861
TM		 4443 request->fl_flags |= FL_ACCESS;
4444 status = do_vfs_lock(request->fl_file, request);
4445 if (status < 0)
4446 goto out;
19e03c57 4447 down_read(&nfsi->rwsem);
01c3b861 4448 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4449 /* Yes: cache locks! */
01c3b861 4450 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4451 request->fl_flags = fl_flags & ~FL_SLEEP;
4452 status = do_vfs_lock(request->fl_file, request);
4453 goto out_unlock;
01c3b861 4454 }
afe6c27c 4455 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4456 if (status != 0)
01c3b861 4457 goto out_unlock;
6bfc93ef 4458 /* Note: we always want to sleep here! */
01c3b861 4459 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4460 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4461 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4462out_unlock:
19e03c57 4463 up_read(&nfsi->rwsem);
01c3b861
TM		 4464out:
4465 request->fl_flags = fl_flags;
1da177e4
LT		 4466 return status;
4467}
4468
4469static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4470{
4471 struct nfs4_exception exception = { };
4472 int err;
4473
4474 do {
965b5d67
TM		 4475 err = _nfs4_proc_setlk(state, cmd, request);
4476 if (err == -NFS4ERR_DENIED)
4477 err = -EAGAIN;
1da177e4 4478 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4479 err, &exception);
1da177e4
LT		 4480 } while (exception.retry);
4481 return err;
4482}
4483
4484static int
4485nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4486{
4487 struct nfs_open_context *ctx;
4488 struct nfs4_state *state;
4489 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4490 int status;
4491
4492 /* verify open state */
cd3758e3 4493 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4494 state = ctx->state;
4495
4496 if (request->fl_start < 0 || request->fl_end < 0)
4497 return -EINVAL;
4498
d953126a
TM		 4499 if (IS_GETLK(cmd)) {
4500 if (state != NULL)
4501 return nfs4_proc_getlk(state, F_GETLK, request);
4502 return 0;
4503 }
1da177e4
LT		 4504
4505 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4506 return -EINVAL;
4507
d953126a
TM		 4508 if (request->fl_type == F_UNLCK) {
4509 if (state != NULL)
4510 return nfs4_proc_unlck(state, cmd, request);
4511 return 0;
4512 }
1da177e4 4513
d953126a
TM		 4514 if (state == NULL)
4515 return -ENOLCK;
1da177e4
LT		 4516 do {
4517 status = nfs4_proc_setlk(state, cmd, request);
4518 if ((status != -EAGAIN) || IS_SETLK(cmd))
4519 break;
4520 timeout = nfs4_set_lock_task_retry(timeout);
4521 status = -ERESTARTSYS;
4522 if (signalled())
4523 break;
4524 } while(status < 0);
1da177e4
LT		 4525 return status;
4526}
4527
888e694c
TM		 4528int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4529{
4530 struct nfs_server *server = NFS_SERVER(state->inode);
4531 struct nfs4_exception exception = { };
4532 int err;
4533
4534 err = nfs4_set_lock_state(state, fl);
4535 if (err != 0)
4536 goto out;
4537 do {
afe6c27c 4538 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4539 switch (err) {
4540 default:
4541 printk(KERN_ERR "%s: unhandled error %d.\n",
4542 __func__, err);
4543 case 0:
965b5d67 4544 case -ESTALE:
d5122201
TM		 4545 goto out;
4546 case -NFS4ERR_EXPIRED:
4547 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4548 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4549 nfs4_schedule_lease_recovery(server->nfs_client);
4550 goto out;
74e7bb73
RL		 4551 case -NFS4ERR_BADSESSION:
4552 case -NFS4ERR_BADSLOT:
4553 case -NFS4ERR_BAD_HIGH_SLOT:
4554 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4555 case -NFS4ERR_DEADSESSION:
0400a6b0 4556 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4557 goto out;
965b5d67
TM		 4558 case -ERESTARTSYS:
4559 /*
4560 * The show must go on: exit, but mark the
4561 * stateid as needing recovery.
4562 */
4563 case -NFS4ERR_ADMIN_REVOKED:
4564 case -NFS4ERR_BAD_STATEID:
4565 case -NFS4ERR_OPENMODE:
0400a6b0 4566 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4567 err = 0;
4568 goto out;
168667c4
TM		 4569 case -EKEYEXPIRED:
4570 /*
4571 * User RPCSEC_GSS context has expired.
4572 * We cannot recover this stateid now, so
4573 * skip it and allow recovery thread to
4574 * proceed.
4575 */
4576 err = 0;
4577 goto out;
965b5d67
TM		 4578 case -ENOMEM:
4579 case -NFS4ERR_DENIED:
4580 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4581 err = 0;
4582 goto out;
d5122201
TM		 4583 case -NFS4ERR_DELAY:
4584 break;
4585 }
888e694c
TM		 4586 err = nfs4_handle_exception(server, err, &exception);
4587 } while (exception.retry);
4588out:
4589 return err;
4590}
6b3b5496 4591
d3c7b7cc
TM		 4592static void nfs4_release_lockowner_release(void *calldata)
4593{
4594 kfree(calldata);
4595}
4596
4597const struct rpc_call_ops nfs4_release_lockowner_ops = {
4598 .rpc_release = nfs4_release_lockowner_release,
4599};
4600
4601void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4602{
4603 struct nfs_server *server = lsp->ls_state->owner->so_server;
4604 struct nfs_release_lockowner_args *args;
4605 struct rpc_message msg = {
4606 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4607 };
4608
4609 if (server->nfs_client->cl_mvops->minor_version != 0)
4610 return;
4611 args = kmalloc(sizeof(*args), GFP_NOFS);
4612 if (!args)
4613 return;
4614 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4615 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4616 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4617 msg.rpc_argp = args;
4618 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4619}
4620
aa1870af
BF		 4621#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4622
64c2ce8b
AK		 4623static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4624 const void *buf, size_t buflen,
4625 int flags, int type)
6b3b5496 4626{
64c2ce8b
AK		 4627 if (strcmp(key, "") != 0)
4628 return -EINVAL;
4b580ee3 4629
64c2ce8b 4630 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4631}
4632
64c2ce8b
AK		 4633static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4634 void *buf, size_t buflen, int type)
6b3b5496 4635{
64c2ce8b
AK		 4636 if (strcmp(key, "") != 0)
4637 return -EINVAL;
aa1870af 4638
64c2ce8b 4639 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4640}
4641
64c2ce8b
AK		 4642static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4643 size_t list_len, const char *name,
4644 size_t name_len, int type)
6b3b5496 4645{
64c2ce8b 4646 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4647
096455a2
BF		 4648 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4649 return 0;
64c2ce8b
AK		 4650
4651 if (list && len <= list_len)
4652 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4653 return len;
6b3b5496
BF		 4654}
4655
69aaaae1
TM		 4656static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4657{
4658 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4659 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4660 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4661 return;
4662
4663 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4664 NFS_ATTR_FATTR_NLINK;
4665 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4666 fattr->nlink = 2;
4667}
4668
56659e99 4669int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4670 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4671{
4672 struct nfs_server *server = NFS_SERVER(dir);
4673 u32 bitmask[2] = {
361e624f
MN		 4674 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4675 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4676 };
4677 struct nfs4_fs_locations_arg args = {
4678 .dir_fh = NFS_FH(dir),
c228fd3a 4679 .name = name,
683b57b4
TM		 4680 .page = page,
4681 .bitmask = bitmask,
4682 };
22958463
BH		 4683 struct nfs4_fs_locations_res res = {
4684 .fs_locations = fs_locations,
4685 };
683b57b4
TM		 4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4688 .rpc_argp = &args,
22958463 4689 .rpc_resp = &res,
683b57b4
TM		 4690 };
4691 int status;
4692
3110ff80 4693 dprintk("%s: start\n", __func__);
c228fd3a 4694 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4695 fs_locations->server = server;
830b8e33 4696 fs_locations->nlocations = 0;
7c513058 4697 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
69aaaae1 4698 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4699 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4700 return status;
4701}
4702
5a5ea0d4
BS		 4703static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4704{
4705 int status;
4706 struct nfs4_secinfo_arg args = {
4707 .dir_fh = NFS_FH(dir),
4708 .name = name,
4709 };
4710 struct nfs4_secinfo_res res = {
4711 .flavors = flavors,
4712 };
4713 struct rpc_message msg = {
4714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4715 .rpc_argp = &args,
4716 .rpc_resp = &res,
4717 };
4718
4719 dprintk("NFS call secinfo %s\n", name->name);
4720 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4721 dprintk("NFS reply secinfo: %d\n", status);
4722 return status;
4723}
4724
4725int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4726{
4727 struct nfs4_exception exception = { };
4728 int err;
4729 do {
4730 err = nfs4_handle_exception(NFS_SERVER(dir),
4731 _nfs4_proc_secinfo(dir, name, flavors),
4732 &exception);
4733 } while (exception.retry);
4734 return err;
4735}
4736
557134a3 4737#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4738/*
4739 * Check the exchange flags returned by the server for invalid flags, having
4740 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4741 * DS flags set.
4742 */
4743static int nfs4_check_cl_exchange_flags(u32 flags)
4744{
4745 if (flags & ~EXCHGID4_FLAG_MASK_R)
4746 goto out_inval;
4747 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4748 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4749 goto out_inval;
4750 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4751 goto out_inval;
4752 return NFS_OK;
4753out_inval:
4754 return -NFS4ERR_INVAL;
4755}
4756
99fe60d0
BH		 4757/*
4758 * nfs4_proc_exchange_id()
4759 *
4760 * Since the clientid has expired, all compounds using sessions
4761 * associated with the stale clientid will be returning
4762 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4763 * be in some phase of session reset.
4764 */
4d643d1d 4765int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4766{
4767 nfs4_verifier verifier;
4768 struct nfs41_exchange_id_args args = {
4769 .client = clp,
357f54d6 4770 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4771 };
4772 struct nfs41_exchange_id_res res = {
4773 .client = clp,
4774 };
4775 int status;
4776 struct rpc_message msg = {
4777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4778 .rpc_argp = &args,
4779 .rpc_resp = &res,
4780 .rpc_cred = cred,
4781 };
4782 __be32 *p;
4783
4784 dprintk("--> %s\n", __func__);
4785 BUG_ON(clp == NULL);
a7b72103 4786
99fe60d0
BH		 4787 p = (u32 *)verifier.data;
4788 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4789 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4790 args.verifier = &verifier;
4791
c7a360b0
AA		 4792 args.id_len = scnprintf(args.id, sizeof(args.id),
4793 "%s/%s.%s/%u",
4794 clp->cl_ipaddr,
4795 init_utsname()->nodename,
4796 init_utsname()->domainname,
4797 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4798
c7a360b0
AA		 4799 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4800 if (!status)
4801 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4802 dprintk("<-- %s status= %d\n", __func__, status);
4803 return status;
4804}
4805
2050f0cc
AA		 4806struct nfs4_get_lease_time_data {
4807 struct nfs4_get_lease_time_args *args;
4808 struct nfs4_get_lease_time_res *res;
4809 struct nfs_client *clp;
4810};
4811
4812static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4813 void *calldata)
4814{
4815 int ret;
4816 struct nfs4_get_lease_time_data *data =
4817 (struct nfs4_get_lease_time_data *)calldata;
4818
4819 dprintk("--> %s\n", __func__);
689cf5c1 4820 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4821 /* just setup sequence, do not trigger session recovery
4822 since we're invoked within one */
4823 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4824 &data->args->la_seq_args,
4825 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4826
4827 BUG_ON(ret == -EAGAIN);
4828 rpc_call_start(task);
4829 dprintk("<-- %s\n", __func__);
4830}
4831
4832/*
4833 * Called from nfs4_state_manager thread for session setup, so don't recover
4834 * from sequence operation or clientid errors.
4835 */
4836static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4837{
4838 struct nfs4_get_lease_time_data *data =
4839 (struct nfs4_get_lease_time_data *)calldata;
4840
4841 dprintk("--> %s\n", __func__);
14516c3a
TM		 4842 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4843 return;
2050f0cc
AA		 4844 switch (task->tk_status) {
4845 case -NFS4ERR_DELAY:
4846 case -NFS4ERR_GRACE:
4847 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4848 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4849 task->tk_status = 0;
0110ee15 4850 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4851 return;
4852 }
2050f0cc
AA		 4853 dprintk("<-- %s\n", __func__);
4854}
4855
4856struct rpc_call_ops nfs4_get_lease_time_ops = {
4857 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4858 .rpc_call_done = nfs4_get_lease_time_done,
4859};
4860
4861int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4862{
4863 struct rpc_task *task;
4864 struct nfs4_get_lease_time_args args;
4865 struct nfs4_get_lease_time_res res = {
4866 .lr_fsinfo = fsinfo,
4867 };
4868 struct nfs4_get_lease_time_data data = {
4869 .args = &args,
4870 .res = &res,
4871 .clp = clp,
4872 };
4873 struct rpc_message msg = {
4874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4875 .rpc_argp = &args,
4876 .rpc_resp = &res,
4877 };
4878 struct rpc_task_setup task_setup = {
4879 .rpc_client = clp->cl_rpcclient,
4880 .rpc_message = &msg,
4881 .callback_ops = &nfs4_get_lease_time_ops,
4882 .callback_data = &data
4883 };
4884 int status;
4885
2050f0cc
AA		 4886 dprintk("--> %s\n", __func__);
4887 task = rpc_run_task(&task_setup);
4888
4889 if (IS_ERR(task))
4890 status = PTR_ERR(task);
4891 else {
4892 status = task->tk_status;
4893 rpc_put_task(task);
4894 }
4895 dprintk("<-- %s return %d\n", __func__, status);
4896
4897 return status;
4898}
4899
b73dafa7
RL		 4900/*
4901 * Reset a slot table
4902 */
104aeba4
AA		 4903static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4904 int ivalue)
ac72b7b3 4905{
104aeba4 4906 struct nfs4_slot *new = NULL;
b73dafa7 4907 int i;
ac72b7b3
AA		 4908 int ret = 0;
4909
104aeba4
AA		 4910 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4911 max_reqs, tbl->max_slots);
ac72b7b3 4912
104aeba4
AA		 4913 /* Does the newly negotiated max_reqs match the existing slot table? */
4914 if (max_reqs != tbl->max_slots) {
4915 ret = -ENOMEM;
4916 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4917 GFP_NOFS);
104aeba4
AA		 4918 if (!new)
4919 goto out;
4920 ret = 0;
4921 kfree(tbl->slots);
ac72b7b3
AA		 4922 }
4923 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4924 if (new) {
4925 tbl->slots = new;
4926 tbl->max_slots = max_reqs;
4927 }
4928 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4929 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4930 spin_unlock(&tbl->slot_tbl_lock);
4931 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4932 tbl, tbl->slots, tbl->max_slots);
4933out:
4934 dprintk("<-- %s: return %d\n", __func__, ret);
4935 return ret;
4936}
4937
b73dafa7
RL		 4938/*
4939 * Reset the forechannel and backchannel slot tables
4940 */
4941static int nfs4_reset_slot_tables(struct nfs4_session *session)
4942{
4943 int status;
4944
4945 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4946 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4947 if (status)
4948 return status;
4949
4950 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4951 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4952 return status;
4953}
4954
f8625a6a
RL		 4955/* Destroy the slot table */
4956static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4957{
4958 if (session->fc_slot_table.slots != NULL) {
4959 kfree(session->fc_slot_table.slots);
4960 session->fc_slot_table.slots = NULL;
4961 }
4962 if (session->bc_slot_table.slots != NULL) {
4963 kfree(session->bc_slot_table.slots);
4964 session->bc_slot_table.slots = NULL;
4965 }
4966 return;
4967}
4968
fc931582
AA		 4969/*
4970 * Initialize slot table
4971 */
050047ce
RL		 4972static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4973 int max_slots, int ivalue)
fc931582 4974{
fc931582
AA		 4975 struct nfs4_slot *slot;
4976 int ret = -ENOMEM;
4977
4978 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4979
050047ce 4980 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4981
8535b2be 4982 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4983 if (!slot)
4984 goto out;
fc931582
AA		 4985 ret = 0;
4986
4987 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4988 tbl->max_slots = max_slots;
4989 tbl->slots = slot;
4990 tbl->highest_used_slotid = -1; /* no slot is currently used */
4991 spin_unlock(&tbl->slot_tbl_lock);
4992 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4993 tbl, tbl->slots, tbl->max_slots);
4994out:
4995 dprintk("<-- %s: return %d\n", __func__, ret);
4996 return ret;
fc931582
AA		 4997}
4998
050047ce
RL		 4999/*
5000 * Initialize the forechannel and backchannel tables
5001 */
5002static int nfs4_init_slot_tables(struct nfs4_session *session)
5003{
f26468fb
TM		 5004 struct nfs4_slot_table *tbl;
5005 int status = 0;
050047ce 5006
f26468fb
TM		 5007 tbl = &session->fc_slot_table;
5008 if (tbl->slots == NULL) {
5009 status = nfs4_init_slot_table(tbl,
5010 session->fc_attrs.max_reqs, 1);
5011 if (status)
5012 return status;
5013 }
050047ce 5014
f26468fb
TM		 5015 tbl = &session->bc_slot_table;
5016 if (tbl->slots == NULL) {
5017 status = nfs4_init_slot_table(tbl,
5018 session->bc_attrs.max_reqs, 0);
5019 if (status)
5020 nfs4_destroy_slot_tables(session);
5021 }
f8625a6a
RL		 5022
5023 return status;
557134a3
AA		 5024}
5025
5026struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5027{
5028 struct nfs4_session *session;
5029 struct nfs4_slot_table *tbl;
5030
8535b2be 5031 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5032 if (!session)
5033 return NULL;
76db6d95 5034
557134a3 5035 tbl = &session->fc_slot_table;
9dfdf404 5036 tbl->highest_used_slotid = -1;
557134a3 5037 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5038 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5039 init_completion(&tbl->complete);
f8625a6a
RL		 5040
5041 tbl = &session->bc_slot_table;
9dfdf404 5042 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5043 spin_lock_init(&tbl->slot_tbl_lock);
5044 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5045 init_completion(&tbl->complete);
f8625a6a 5046
1055d76d
TM		 5047 session->session_state = 1<<NFS4_SESSION_INITING;
5048
557134a3
AA		 5049 session->clp = clp;
5050 return session;
5051}
5052
5053void nfs4_destroy_session(struct nfs4_session *session)
5054{
5a0ffe54
AA		 5055 nfs4_proc_destroy_session(session);
5056 dprintk("%s Destroy backchannel for xprt %p\n",
5057 __func__, session->clp->cl_rpcclient->cl_xprt);
5058 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5059 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5060 nfs4_destroy_slot_tables(session);
557134a3
AA		 5061 kfree(session);
5062}
5063
fc931582
AA		 5064/*
5065 * Initialize the values to be used by the client in CREATE_SESSION
5066 * If nfs4_init_session set the fore channel request and response sizes,
5067 * use them.
5068 *
5069 * Set the back channel max_resp_sz_cached to zero to force the client to
5070 * always set csa_cachethis to FALSE because the current implementation
5071 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5072 */
5073static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5074{
5075 struct nfs4_session *session = args->client->cl_session;
5076 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5077 mxresp_sz = session->fc_attrs.max_resp_sz;
5078
5079 if (mxrqst_sz == 0)
5080 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5081 if (mxresp_sz == 0)
5082 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5083 /* Fore channel attributes */
5084 args->fc_attrs.headerpadsz = 0;
5085 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5086 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5087 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5088 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5089
5090 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5091 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5092 __func__,
5093 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5094 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5095
5096 /* Back channel attributes */
5097 args->bc_attrs.headerpadsz = 0;
5098 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5099 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5100 args->bc_attrs.max_resp_sz_cached = 0;
5101 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5102 args->bc_attrs.max_reqs = 1;
5103
5104 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5105 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5106 __func__,
5107 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5108 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5109 args->bc_attrs.max_reqs);
5110}
5111
43c2e885 5112static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5113{
43c2e885
BF		 5114 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5115 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5116
5117 if (rcvd->headerpadsz > sent->headerpadsz)
5118 return -EINVAL;
5119 if (rcvd->max_resp_sz > sent->max_resp_sz)
5120 return -EINVAL;
5121 /*
5122 * Our requested max_ops is the minimum we need; we're not
5123 * prepared to break up compounds into smaller pieces than that.
5124 * So, no point even trying to continue if the server won't
5125 * cooperate:
5126 */
5127 if (rcvd->max_ops < sent->max_ops)
5128 return -EINVAL;
5129 if (rcvd->max_reqs == 0)
5130 return -EINVAL;
5131 return 0;
8d35301d
AA		 5132}
5133
43c2e885
BF		 5134static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5135{
5136 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5137 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5138
43c2e885
BF		 5139 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5140 return -EINVAL;
5141 if (rcvd->max_resp_sz < sent->max_resp_sz)
5142 return -EINVAL;
5143 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5144 return -EINVAL;
5145 /* These would render the backchannel useless: */
5146 if (rcvd->max_ops == 0)
5147 return -EINVAL;
5148 if (rcvd->max_reqs == 0)
5149 return -EINVAL;
5150 return 0;
5151}
8d35301d 5152
8d35301d
AA		 5153static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5154 struct nfs4_session *session)
5155{
43c2e885 5156 int ret;
8d35301d 5157
43c2e885
BF		 5158 ret = nfs4_verify_fore_channel_attrs(args, session);
5159 if (ret)
5160 return ret;
5161 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5162}
5163
fc931582
AA		 5164static int _nfs4_proc_create_session(struct nfs_client *clp)
5165{
5166 struct nfs4_session *session = clp->cl_session;
5167 struct nfs41_create_session_args args = {
5168 .client = clp,
5169 .cb_program = NFS4_CALLBACK,
5170 };
5171 struct nfs41_create_session_res res = {
5172 .client = clp,
5173 };
5174 struct rpc_message msg = {
5175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5176 .rpc_argp = &args,
5177 .rpc_resp = &res,
5178 };
5179 int status;
5180
5181 nfs4_init_channel_attrs(&args);
0f91421e 5182 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5183
5184 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5185
8d35301d
AA		 5186 if (!status)
5187 /* Verify the session's negotiated channel_attrs values */
5188 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5189 if (!status) {
5190 /* Increment the clientid slot sequence id */
5191 clp->cl_seqid++;
5192 }
5193
5194 return status;
5195}
5196
5197/*
5198 * Issues a CREATE_SESSION operation to the server.
5199 * It is the responsibility of the caller to verify the session is
5200 * expired before calling this routine.
5201 */
f26468fb 5202int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5203{
5204 int status;
5205 unsigned *ptr;
fc931582 5206 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5207 long timeout = 0;
5208 int err;
fc931582
AA		 5209
5210 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5211
7d6d63d6
RL		 5212 do {
5213 status = _nfs4_proc_create_session(clp);
5214 if (status == -NFS4ERR_DELAY) {
5215 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5216 if (err)
5217 status = err;
5218 }
5219 } while (status == -NFS4ERR_DELAY);
5220
fc931582
AA		 5221 if (status)
5222 goto out;
5223
f26468fb
TM		 5224 /* Init and reset the fore channel */
5225 status = nfs4_init_slot_tables(session);
5226 dprintk("slot table initialization returned %d\n", status);
5227 if (status)
5228 goto out;
5229 status = nfs4_reset_slot_tables(session);
5230 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5231 if (status)
5232 goto out;
5233
5234 ptr = (unsigned *)&session->sess_id.data[0];
5235 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5236 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5237out:
5238 dprintk("<-- %s\n", __func__);
5239 return status;
5240}
5241
0f3e66c6
AA		 5242/*
5243 * Issue the over-the-wire RPC DESTROY_SESSION.
5244 * The caller must serialize access to this routine.
5245 */
5246int nfs4_proc_destroy_session(struct nfs4_session *session)
5247{
5248 int status = 0;
5249 struct rpc_message msg;
5250
5251 dprintk("--> nfs4_proc_destroy_session\n");
5252
5253 /* session is still being setup */
5254 if (session->clp->cl_cons_state != NFS_CS_READY)
5255 return status;
5256
5257 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5258 msg.rpc_argp = session;
5259 msg.rpc_resp = NULL;
5260 msg.rpc_cred = NULL;
5261 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5262
5263 if (status)
5264 printk(KERN_WARNING
5265 "Got error %d from the server on DESTROY_SESSION. "
5266 "Session has been destroyed regardless...\n", status);
5267
5268 dprintk("<-- nfs4_proc_destroy_session\n");
5269 return status;
5270}
5271
fccba804
TM		 5272int nfs4_init_session(struct nfs_server *server)
5273{
5274 struct nfs_client *clp = server->nfs_client;
2449ea2e 5275 struct nfs4_session *session;
68bf05ef 5276 unsigned int rsize, wsize;
fccba804
TM		 5277 int ret;
5278
5279 if (!nfs4_has_session(clp))
5280 return 0;
5281
1055d76d
TM		 5282 session = clp->cl_session;
5283 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5284 return 0;
5285
68bf05ef
AA		 5286 rsize = server->rsize;
5287 if (rsize == 0)
5288 rsize = NFS_MAX_FILE_IO_SIZE;
5289 wsize = server->wsize;
5290 if (wsize == 0)
5291 wsize = NFS_MAX_FILE_IO_SIZE;
5292
68bf05ef
AA		 5293 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5294 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5295
fccba804
TM		 5296 ret = nfs4_recover_expired_lease(server);
5297 if (!ret)
5298 ret = nfs4_check_client_ready(clp);
5299 return ret;
5300}
5301
d83217c1
AA		 5302int nfs4_init_ds_session(struct nfs_client *clp)
5303{
5304 struct nfs4_session *session = clp->cl_session;
5305 int ret;
5306
5307 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5308 return 0;
5309
5310 ret = nfs4_client_recover_expired_lease(clp);
5311 if (!ret)
5312 /* Test for the DS role */
5313 if (!is_ds_client(clp))
5314 ret = -ENODEV;
5315 if (!ret)
5316 ret = nfs4_check_client_ready(clp);
5317 return ret;
5318
5319}
5320EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5321
5322
fc01cea9
AA		 5323/*
5324 * Renew the cl_session lease.
5325 */
d5f8d3fe
TM		 5326struct nfs4_sequence_data {
5327 struct nfs_client *clp;
5328 struct nfs4_sequence_args args;
5329 struct nfs4_sequence_res res;
5330};
5331
dc96aef9
AB		 5332static void nfs41_sequence_release(void *data)
5333{
d5f8d3fe
TM		 5334 struct nfs4_sequence_data *calldata = data;
5335 struct nfs_client *clp = calldata->clp;
dc96aef9 5336
7135840f
AB		 5337 if (atomic_read(&clp->cl_count) > 1)
5338 nfs4_schedule_state_renewal(clp);
5339 nfs_put_client(clp);
d5f8d3fe 5340 kfree(calldata);
dc96aef9
AB		 5341}
5342
aa5190d0
TM		 5343static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5344{
5345 switch(task->tk_status) {
5346 case -NFS4ERR_DELAY:
aa5190d0
TM		 5347 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5348 return -EAGAIN;
5349 default:
0400a6b0 5350 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5351 }
5352 return 0;
5353}
5354
dc96aef9 5355static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5356{
d5f8d3fe
TM		 5357 struct nfs4_sequence_data *calldata = data;
5358 struct nfs_client *clp = calldata->clp;
fc01cea9 5359
14516c3a
TM		 5360 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5361 return;
fc01cea9
AA		 5362
5363 if (task->tk_status < 0) {
5364 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5365 if (atomic_read(&clp->cl_count) == 1)
5366 goto out;
fc01cea9 5367
aa5190d0
TM		 5368 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5369 rpc_restart_call_prepare(task);
fc01cea9
AA		 5370 return;
5371 }
5372 }
fc01cea9 5373 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5374out:
fc01cea9
AA		 5375 dprintk("<-- %s\n", __func__);
5376}
5377
5378static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5379{
d5f8d3fe
TM		 5380 struct nfs4_sequence_data *calldata = data;
5381 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5382 struct nfs4_sequence_args *args;
5383 struct nfs4_sequence_res *res;
5384
fc01cea9
AA		 5385 args = task->tk_msg.rpc_argp;
5386 res = task->tk_msg.rpc_resp;
5387
035168ab 5388 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5389 return;
5390 rpc_call_start(task);
5391}
5392
5393static const struct rpc_call_ops nfs41_sequence_ops = {
5394 .rpc_call_done = nfs41_sequence_call_done,
5395 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5396 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5397};
5398
71ac6da9 5399static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5400{
d5f8d3fe 5401 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5402 struct rpc_message msg = {
5403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5404 .rpc_cred = cred,
5405 };
71ac6da9
TM		 5406 struct rpc_task_setup task_setup_data = {
5407 .rpc_client = clp->cl_rpcclient,
5408 .rpc_message = &msg,
5409 .callback_ops = &nfs41_sequence_ops,
5410 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5411 };
fc01cea9 5412
7135840f 5413 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5414 return ERR_PTR(-EIO);
dfb4f309 5415 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5416 if (calldata == NULL) {
7135840f 5417 nfs_put_client(clp);
71ac6da9 5418 return ERR_PTR(-ENOMEM);
fc01cea9 5419 }
d5f8d3fe
TM		 5420 msg.rpc_argp = &calldata->args;
5421 msg.rpc_resp = &calldata->res;
5422 calldata->clp = clp;
71ac6da9 5423 task_setup_data.callback_data = calldata;
fc01cea9 5424
71ac6da9
TM		 5425 return rpc_run_task(&task_setup_data);
5426}
5427
5428static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5429{
5430 struct rpc_task *task;
5431 int ret = 0;
5432
5433 task = _nfs41_proc_sequence(clp, cred);
5434 if (IS_ERR(task))
5435 ret = PTR_ERR(task);
5436 else
bf294b41 5437 rpc_put_task_async(task);
71ac6da9
TM		 5438 dprintk("<-- %s status=%d\n", __func__, ret);
5439 return ret;
5440}
5441
5442static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5443{
5444 struct rpc_task *task;
5445 int ret;
5446
5447 task = _nfs41_proc_sequence(clp, cred);
5448 if (IS_ERR(task)) {
5449 ret = PTR_ERR(task);
5450 goto out;
5451 }
5452 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5453 if (!ret) {
5454 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5455
5456 if (task->tk_status == 0)
5457 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5458 ret = task->tk_status;
b4410c2f 5459 }
71ac6da9
TM		 5460 rpc_put_task(task);
5461out:
5462 dprintk("<-- %s status=%d\n", __func__, ret);
5463 return ret;
fc01cea9
AA		 5464}
5465
fce5c838
RL		 5466struct nfs4_reclaim_complete_data {
5467 struct nfs_client *clp;
5468 struct nfs41_reclaim_complete_args arg;
5469 struct nfs41_reclaim_complete_res res;
5470};
5471
5472static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5473{
5474 struct nfs4_reclaim_complete_data *calldata = data;
5475
b257957e 5476 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5477 if (nfs41_setup_sequence(calldata->clp->cl_session,
5478 &calldata->arg.seq_args,
fce5c838
RL		 5479 &calldata->res.seq_res, 0, task))
5480 return;
5481
5482 rpc_call_start(task);
5483}
5484
aa5190d0
TM		 5485static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5486{
5487 switch(task->tk_status) {
5488 case 0:
5489 case -NFS4ERR_COMPLETE_ALREADY:
5490 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5491 break;
5492 case -NFS4ERR_DELAY:
aa5190d0
TM		 5493 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5494 return -EAGAIN;
5495 default:
0400a6b0 5496 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5497 }
5498 return 0;
5499}
5500
fce5c838
RL		 5501static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5502{
5503 struct nfs4_reclaim_complete_data *calldata = data;
5504 struct nfs_client *clp = calldata->clp;
5505 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5506
5507 dprintk("--> %s\n", __func__);
14516c3a
TM		 5508 if (!nfs41_sequence_done(task, res))
5509 return;
fce5c838 5510
aa5190d0
TM		 5511 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5512 rpc_restart_call_prepare(task);
5513 return;
5514 }
fce5c838
RL		 5515 dprintk("<-- %s\n", __func__);
5516}
5517
5518static void nfs4_free_reclaim_complete_data(void *data)
5519{
5520 struct nfs4_reclaim_complete_data *calldata = data;
5521
5522 kfree(calldata);
5523}
5524
5525static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5526 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5527 .rpc_call_done = nfs4_reclaim_complete_done,
5528 .rpc_release = nfs4_free_reclaim_complete_data,
5529};
5530
5531/*
5532 * Issue a global reclaim complete.
5533 */
5534static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5535{
5536 struct nfs4_reclaim_complete_data *calldata;
5537 struct rpc_task *task;
5538 struct rpc_message msg = {
5539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5540 };
5541 struct rpc_task_setup task_setup_data = {
5542 .rpc_client = clp->cl_rpcclient,
5543 .rpc_message = &msg,
5544 .callback_ops = &nfs4_reclaim_complete_call_ops,
5545 .flags = RPC_TASK_ASYNC,
5546 };
5547 int status = -ENOMEM;
5548
5549 dprintk("--> %s\n", __func__);
8535b2be 5550 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5551 if (calldata == NULL)
5552 goto out;
5553 calldata->clp = clp;
5554 calldata->arg.one_fs = 0;
fce5c838
RL		 5555
5556 msg.rpc_argp = &calldata->arg;
5557 msg.rpc_resp = &calldata->res;
5558 task_setup_data.callback_data = calldata;
5559 task = rpc_run_task(&task_setup_data);
acf82b85 5560 if (IS_ERR(task)) {
fce5c838 5561 status = PTR_ERR(task);
acf82b85
DC		 5562 goto out;
5563 }
c34c32ea
AA		 5564 status = nfs4_wait_for_completion_rpc_task(task);
5565 if (status == 0)
5566 status = task->tk_status;
fce5c838 5567 rpc_put_task(task);
acf82b85 5568 return 0;
fce5c838
RL		 5569out:
5570 dprintk("<-- %s status=%d\n", __func__, status);
5571 return status;
5572}
b1f69b75
AA		 5573
5574static void
5575nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5576{
5577 struct nfs4_layoutget *lgp = calldata;
c31663d4 5578 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5579
5580 dprintk("--> %s\n", __func__);
c31663d4
FI		 5581 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5582 * right now covering the LAYOUTGET we are about to send.
5583 * However, that is not so catastrophic, and there seems
5584 * to be no way to prevent it completely.
5585 */
b1f69b75
AA		 5586 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5587 &lgp->res.seq_res, 0, task))
5588 return;
cf7d63f1
FI		 5589 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5590 NFS_I(lgp->args.inode)->layout,
5591 lgp->args.ctx->state)) {
5592 rpc_exit(task, NFS4_OK);
5593 return;
5594 }
b1f69b75
AA		 5595 rpc_call_start(task);
5596}
5597
5598static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5599{
5600 struct nfs4_layoutget *lgp = calldata;
5601 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5602
5603 dprintk("--> %s\n", __func__);
5604
5605 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5606 return;
5607
5608 switch (task->tk_status) {
5609 case 0:
5610 break;
5611 case -NFS4ERR_LAYOUTTRYLATER:
5612 case -NFS4ERR_RECALLCONFLICT:
5613 task->tk_status = -NFS4ERR_DELAY;
5614 /* Fall through */
5615 default:
5616 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5617 rpc_restart_call_prepare(task);
5618 return;
5619 }
5620 }
b1f69b75
AA		 5621 dprintk("<-- %s\n", __func__);
5622}
5623
5624static void nfs4_layoutget_release(void *calldata)
5625{
5626 struct nfs4_layoutget *lgp = calldata;
5627
5628 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5629 put_nfs_open_context(lgp->args.ctx);
5630 kfree(calldata);
5631 dprintk("<-- %s\n", __func__);
5632}
5633
5634static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5635 .rpc_call_prepare = nfs4_layoutget_prepare,
5636 .rpc_call_done = nfs4_layoutget_done,
5637 .rpc_release = nfs4_layoutget_release,
5638};
5639
5640int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5641{
5642 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5643 struct rpc_task *task;
5644 struct rpc_message msg = {
5645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5646 .rpc_argp = &lgp->args,
5647 .rpc_resp = &lgp->res,
5648 };
5649 struct rpc_task_setup task_setup_data = {
5650 .rpc_client = server->client,
5651 .rpc_message = &msg,
5652 .callback_ops = &nfs4_layoutget_call_ops,
5653 .callback_data = lgp,
5654 .flags = RPC_TASK_ASYNC,
5655 };
5656 int status = 0;
5657
5658 dprintk("--> %s\n", __func__);
5659
35124a09 5660 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5661 lgp->res.seq_res.sr_slot = NULL;
5662 task = rpc_run_task(&task_setup_data);
5663 if (IS_ERR(task))
5664 return PTR_ERR(task);
5665 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5666 if (status == 0)
5667 status = task->tk_status;
5668 if (status == 0)
5669 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5670 rpc_put_task(task);
5671 dprintk("<-- %s status=%d\n", __func__, status);
5672 return status;
5673}
5674
5675static int
5676_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5677{
5678 struct nfs4_getdeviceinfo_args args = {
5679 .pdev = pdev,
5680 };
5681 struct nfs4_getdeviceinfo_res res = {
5682 .pdev = pdev,
5683 };
5684 struct rpc_message msg = {
5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5686 .rpc_argp = &args,
5687 .rpc_resp = &res,
5688 };
5689 int status;
5690
5691 dprintk("--> %s\n", __func__);
7c513058 5692 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5693 dprintk("<-- %s status=%d\n", __func__, status);
5694
5695 return status;
5696}
5697
5698int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5699{
5700 struct nfs4_exception exception = { };
5701 int err;
5702
5703 do {
5704 err = nfs4_handle_exception(server,
5705 _nfs4_proc_getdeviceinfo(server, pdev),
5706 &exception);
5707 } while (exception.retry);
5708 return err;
5709}
5710EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5711
863a3c6c
AA		 5712static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5713{
5714 struct nfs4_layoutcommit_data *data = calldata;
5715 struct nfs_server *server = NFS_SERVER(data->args.inode);
5716
5717 if (nfs4_setup_sequence(server, &data->args.seq_args,
5718 &data->res.seq_res, 1, task))
5719 return;
5720 rpc_call_start(task);
5721}
5722
5723static void
5724nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5725{
5726 struct nfs4_layoutcommit_data *data = calldata;
5727 struct nfs_server *server = NFS_SERVER(data->args.inode);
5728
5729 if (!nfs4_sequence_done(task, &data->res.seq_res))
5730 return;
5731
5732 switch (task->tk_status) { /* Just ignore these failures */
5733 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5734 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5735 case NFS4ERR_BADLAYOUT: /* no layout */
5736 case NFS4ERR_GRACE: /* loca_recalim always false */
5737 task->tk_status = 0;
5738 }
5739
5740 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5741 nfs_restart_rpc(task, server->nfs_client);
5742 return;
5743 }
5744
5745 if (task->tk_status == 0)
5746 nfs_post_op_update_inode_force_wcc(data->args.inode,
5747 data->res.fattr);
5748}
5749
5750static void nfs4_layoutcommit_release(void *calldata)
5751{
5752 struct nfs4_layoutcommit_data *data = calldata;
5753
5754 /* Matched by references in pnfs_set_layoutcommit */
5755 put_lseg(data->lseg);
5756 put_rpccred(data->cred);
5757 kfree(data);
5758}
5759
5760static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5761 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5762 .rpc_call_done = nfs4_layoutcommit_done,
5763 .rpc_release = nfs4_layoutcommit_release,
5764};
5765
5766int
ef311537 5767nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5768{
5769 struct rpc_message msg = {
5770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5771 .rpc_argp = &data->args,
5772 .rpc_resp = &data->res,
5773 .rpc_cred = data->cred,
5774 };
5775 struct rpc_task_setup task_setup_data = {
5776 .task = &data->task,
5777 .rpc_client = NFS_CLIENT(data->args.inode),
5778 .rpc_message = &msg,
5779 .callback_ops = &nfs4_layoutcommit_ops,
5780 .callback_data = data,
5781 .flags = RPC_TASK_ASYNC,
5782 };
5783 struct rpc_task *task;
5784 int status = 0;
5785
5786 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5787 "lbw: %llu inode %lu\n",
5788 data->task.tk_pid, sync,
5789 data->args.lastbytewritten,
5790 data->args.inode->i_ino);
5791
5792 task = rpc_run_task(&task_setup_data);
5793 if (IS_ERR(task))
5794 return PTR_ERR(task);
ef311537 5795 if (sync == false)
863a3c6c
AA		 5796 goto out;
5797 status = nfs4_wait_for_completion_rpc_task(task);
5798 if (status != 0)
5799 goto out;
5800 status = task->tk_status;
5801out:
5802 dprintk("%s: status %d\n", __func__, status);
5803 rpc_put_task(task);
5804 return status;
5805}
557134a3
AA		 5806#endif /* CONFIG_NFS_V4_1 */
5807
591d71cb 5808struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5809 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5810 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5811 .recover_open = nfs4_open_reclaim,
5812 .recover_lock = nfs4_lock_reclaim,
591d71cb 5813 .establish_clid = nfs4_init_clientid,
90a16617 5814 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5815};
5816
591d71cb
AA		 5817#if defined(CONFIG_NFS_V4_1)
5818struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5819 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5820 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5821 .recover_open = nfs4_open_reclaim,
5822 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5823 .establish_clid = nfs41_init_clientid,
b4b82607 5824 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5825 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5826};
5827#endif /* CONFIG_NFS_V4_1 */
5828
5829struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5830 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5831 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5832 .recover_open = nfs4_open_expired,
5833 .recover_lock = nfs4_lock_expired,
5834 .establish_clid = nfs4_init_clientid,
90a16617 5835 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5836};
5837
5838#if defined(CONFIG_NFS_V4_1)
5839struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5840 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5841 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5842 .recover_open = nfs4_open_expired,
5843 .recover_lock = nfs4_lock_expired,
4d643d1d 5844 .establish_clid = nfs41_init_clientid,
b4b82607 5845 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5846};
591d71cb 5847#endif /* CONFIG_NFS_V4_1 */
1da177e4 5848
29fba38b
BH		 5849struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5850 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5851 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5852 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5853};
5854
5855#if defined(CONFIG_NFS_V4_1)
5856struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5857 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5858 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5859 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5860};
5861#endif
5862
97dc1359
TM		 5863static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5864 .minor_version = 0,
5865 .call_sync = _nfs4_call_sync,
e047a10c 5866 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5867 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5868 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5869 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5870};
5871
5872#if defined(CONFIG_NFS_V4_1)
5873static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5874 .minor_version = 1,
5875 .call_sync = _nfs4_call_sync_session,
e047a10c 5876 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5877 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5878 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5879 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5880};
5881#endif
5882
97dc1359
TM		 5883const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5884 [0] = &nfs_v4_0_minor_ops,
5885#if defined(CONFIG_NFS_V4_1)
5886 [1] = &nfs_v4_1_minor_ops,
5887#endif
5888};
5889
92e1d5be 5890static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5891 .permission = nfs_permission,
5892 .getattr = nfs_getattr,
5893 .setattr = nfs_setattr,
64c2ce8b
AK		 5894 .getxattr = generic_getxattr,
5895 .setxattr = generic_setxattr,
5896 .listxattr = generic_listxattr,
5897 .removexattr = generic_removexattr,
6b3b5496
BF		 5898};
5899
509de811 5900const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5901 .version = 4, /* protocol version */
5902 .dentry_ops = &nfs4_dentry_operations,
5903 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5904 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5905 .getroot = nfs4_proc_get_root,
5906 .getattr = nfs4_proc_getattr,
5907 .setattr = nfs4_proc_setattr,
2b3de441 5908 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5909 .lookup = nfs4_proc_lookup,
5910 .access = nfs4_proc_access,
5911 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5912 .create = nfs4_proc_create,
5913 .remove = nfs4_proc_remove,
5914 .unlink_setup = nfs4_proc_unlink_setup,
5915 .unlink_done = nfs4_proc_unlink_done,
5916 .rename = nfs4_proc_rename,
d3d4152a
JL		 5917 .rename_setup = nfs4_proc_rename_setup,
5918 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5919 .link = nfs4_proc_link,
5920 .symlink = nfs4_proc_symlink,
5921 .mkdir = nfs4_proc_mkdir,
5922 .rmdir = nfs4_proc_remove,
5923 .readdir = nfs4_proc_readdir,
5924 .mknod = nfs4_proc_mknod,
5925 .statfs = nfs4_proc_statfs,
5926 .fsinfo = nfs4_proc_fsinfo,
5927 .pathconf = nfs4_proc_pathconf,
e9326dca 5928 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5929 .decode_dirent = nfs4_decode_dirent,
5930 .read_setup = nfs4_proc_read_setup,
ec06c096 5931 .read_done = nfs4_read_done,
1da177e4 5932 .write_setup = nfs4_proc_write_setup,
788e7a89 5933 .write_done = nfs4_write_done,
1da177e4 5934 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5935 .commit_done = nfs4_commit_done,
1da177e4 5936 .lock = nfs4_proc_lock,
e50a1c2e 5937 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5938 .close_context = nfs4_close_context,
2b484297 5939 .open_context = nfs4_atomic_open,
45a52a02 5940 .init_client = nfs4_init_client,
5a5ea0d4 5941 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 5942};
5943
64c2ce8b
AK		 5944static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5945 .prefix = XATTR_NAME_NFSV4_ACL,
5946 .list = nfs4_xattr_list_nfs4_acl,
5947 .get = nfs4_xattr_get_nfs4_acl,
5948 .set = nfs4_xattr_set_nfs4_acl,
5949};
5950
5951const struct xattr_handler *nfs4_xattr_handlers[] = {
5952 &nfs4_xattr_nfs4_acl_handler,
5953 NULL
5954};
5955
1da177e4
LT		 5956/*
5957 * Local variables:
5958 * c-basic-offset: 8
5959 * End:
5960 */
Linux 6.x block layer and io_uring tree(s)