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SUNRPC: Remove unnecessary export of rpc_sockaddr2uaddr
[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);
f062eb6c
BS		 83#ifdef CONFIG_NFS_V4_1
84static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
85static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
86#endif
1da177e4 87/* Prevent leaks of NFSv4 errors into userland */
46f72f57 88static int nfs4_map_errors(int err)
1da177e4 89{
52567b03
TM		 90 if (err >= -1000)
91 return err;
92 switch (err) {
93 case -NFS4ERR_RESOURCE:
94 return -EREMOTEIO;
7ebb9315
BS		 95 case -NFS4ERR_WRONGSEC:
96 return -EPERM;
3ddeb7c5
TM		 97 case -NFS4ERR_BADOWNER:
98 case -NFS4ERR_BADNAME:
99 return -EINVAL;
52567b03 100 default:
1da177e4 101 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 102 __func__, -err);
52567b03 103 break;
1da177e4 104 }
52567b03 105 return -EIO;
1da177e4
LT		 106}
107
108/*
109 * This is our standard bitmap for GETATTR requests.
110 */
111const u32 nfs4_fattr_bitmap[2] = {
112 FATTR4_WORD0_TYPE
113 | FATTR4_WORD0_CHANGE
114 | FATTR4_WORD0_SIZE
115 | FATTR4_WORD0_FSID
116 | FATTR4_WORD0_FILEID,
117 FATTR4_WORD1_MODE
118 | FATTR4_WORD1_NUMLINKS
119 | FATTR4_WORD1_OWNER
120 | FATTR4_WORD1_OWNER_GROUP
121 | FATTR4_WORD1_RAWDEV
122 | FATTR4_WORD1_SPACE_USED
123 | FATTR4_WORD1_TIME_ACCESS
124 | FATTR4_WORD1_TIME_METADATA
125 | FATTR4_WORD1_TIME_MODIFY
126};
127
128const u32 nfs4_statfs_bitmap[2] = {
129 FATTR4_WORD0_FILES_AVAIL
130 | FATTR4_WORD0_FILES_FREE
131 | FATTR4_WORD0_FILES_TOTAL,
132 FATTR4_WORD1_SPACE_AVAIL
133 | FATTR4_WORD1_SPACE_FREE
134 | FATTR4_WORD1_SPACE_TOTAL
135};
136
4ce79717 137const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 138 FATTR4_WORD0_MAXLINK
139 | FATTR4_WORD0_MAXNAME,
140 0
141};
142
dae100c2 143const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 144 | FATTR4_WORD0_MAXREAD
145 | FATTR4_WORD0_MAXWRITE
146 | FATTR4_WORD0_LEASE_TIME,
55b6e774 147 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 148 | FATTR4_WORD1_FS_LAYOUT_TYPES,
149 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 150};
151
830b8e33
MN		 152const u32 nfs4_fs_locations_bitmap[2] = {
153 FATTR4_WORD0_TYPE
154 | FATTR4_WORD0_CHANGE
155 | FATTR4_WORD0_SIZE
156 | FATTR4_WORD0_FSID
157 | FATTR4_WORD0_FILEID
158 | FATTR4_WORD0_FS_LOCATIONS,
159 FATTR4_WORD1_MODE
160 | FATTR4_WORD1_NUMLINKS
161 | FATTR4_WORD1_OWNER
162 | FATTR4_WORD1_OWNER_GROUP
163 | FATTR4_WORD1_RAWDEV
164 | FATTR4_WORD1_SPACE_USED
165 | FATTR4_WORD1_TIME_ACCESS
166 | FATTR4_WORD1_TIME_METADATA
167 | FATTR4_WORD1_TIME_MODIFY
168 | FATTR4_WORD1_MOUNTED_ON_FILEID
169};
170
bc4785cd 171static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 172 struct nfs4_readdir_arg *readdir)
173{
0dbb4c67 174 __be32 *start, *p;
1da177e4
LT		 175
176 BUG_ON(readdir->count < 80);
177 if (cookie > 2) {
b7ef1956 178 readdir->cookie = cookie;
1da177e4
LT		 179 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
180 return;
181 }
182
183 readdir->cookie = 0;
184 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
185 if (cookie == 2)
186 return;
187
188 /*
189 * NFSv4 servers do not return entries for '.' and '..'
190 * Therefore, we fake these entries here. We let '.'
191 * have cookie 0 and '..' have cookie 1. Note that
192 * when talking to the server, we always send cookie 0
193 * instead of 1 or 2.
194 */
0dbb4c67 195 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 196
197 if (cookie == 0) {
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_one; /* cookie, second word */
201 *p++ = xdr_one; /* entry len */
202 memcpy(p, ".\0\0\0", 4); /* entry */
203 p++;
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
4e769b93 207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 208 }
209
210 *p++ = xdr_one; /* next */
211 *p++ = xdr_zero; /* cookie, first word */
212 *p++ = xdr_two; /* cookie, second word */
213 *p++ = xdr_two; /* entry len */
214 memcpy(p, "..\0\0", 4); /* entry */
215 p++;
216 *p++ = xdr_one; /* bitmap length */
217 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
218 *p++ = htonl(8); /* attribute buffer length */
4e769b93 219 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 220
221 readdir->pgbase = (char *)p - (char *)start;
222 readdir->count -= readdir->pgbase;
223 kunmap_atomic(start, KM_USER0);
224}
225
65de872e
TM		 226static int nfs4_wait_clnt_recover(struct nfs_client *clp)
227{
228 int res;
229
230 might_sleep();
231
e005e804 232 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 233 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 234 return res;
235}
236
237static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
238{
239 int res = 0;
240
241 might_sleep();
242
243 if (*timeout <= 0)
244 *timeout = NFS4_POLL_RETRY_MIN;
245 if (*timeout > NFS4_POLL_RETRY_MAX)
246 *timeout = NFS4_POLL_RETRY_MAX;
247 schedule_timeout_killable(*timeout);
248 if (fatal_signal_pending(current))
249 res = -ERESTARTSYS;
250 *timeout <<= 1;
251 return res;
252}
253
254/* This is the error handling routine for processes that are allowed
255 * to sleep.
256 */
b064eca2 257static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 258{
259 struct nfs_client *clp = server->nfs_client;
9e33bed5 260 struct nfs4_state *state = exception->state;
65de872e
TM		 261 int ret = errorcode;
262
263 exception->retry = 0;
264 switch(errorcode) {
265 case 0:
266 return 0;
9e33bed5
TM		 267 case -NFS4ERR_ADMIN_REVOKED:
268 case -NFS4ERR_BAD_STATEID:
269 case -NFS4ERR_OPENMODE:
270 if (state == NULL)
271 break;
0400a6b0
TM		 272 nfs4_schedule_stateid_recovery(server, state);
273 goto wait_on_recovery;
0ced63d1
TM		 274 case -NFS4ERR_EXPIRED:
275 if (state != NULL)
276 nfs4_schedule_stateid_recovery(server, state);
65de872e 277 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 278 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 279 nfs4_schedule_lease_recovery(clp);
280 goto wait_on_recovery;
03391693 281#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 282 case -NFS4ERR_BADSESSION:
283 case -NFS4ERR_BADSLOT:
284 case -NFS4ERR_BAD_HIGH_SLOT:
285 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
286 case -NFS4ERR_DEADSESSION:
287 case -NFS4ERR_SEQ_FALSE_RETRY:
288 case -NFS4ERR_SEQ_MISORDERED:
289 dprintk("%s ERROR: %d Reset session\n", __func__,
290 errorcode);
0400a6b0 291 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 292 exception->retry = 1;
b9179237 293 break;
03391693 294#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 295 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 296 if (exception->timeout > HZ) {
297 /* We have retried a decent amount, time to
298 * fail
299 */
300 ret = -EBUSY;
301 break;
302 }
65de872e
TM		 303 case -NFS4ERR_GRACE:
304 case -NFS4ERR_DELAY:
2c643488 305 case -EKEYEXPIRED:
65de872e
TM		 306 ret = nfs4_delay(server->client, &exception->timeout);
307 if (ret != 0)
308 break;
a8a4ae3a 309 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 310 case -NFS4ERR_OLD_STATEID:
311 exception->retry = 1;
b064eca2
TM		 312 break;
313 case -NFS4ERR_BADOWNER:
314 /* The following works around a Linux server bug! */
315 case -NFS4ERR_BADNAME:
316 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
317 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
318 exception->retry = 1;
319 printk(KERN_WARNING "NFS: v4 server %s "
320 "does not accept raw "
321 "uid/gids. "
322 "Reenabling the idmapper.\n",
323 server->nfs_client->cl_hostname);
324 }
65de872e
TM		 325 }
326 /* We failed to handle the error */
327 return nfs4_map_errors(ret);
0400a6b0 328wait_on_recovery:
a2c0b9e2
TM		 329 ret = nfs4_wait_clnt_recover(clp);
330 if (ret == 0)
331 exception->retry = 1;
332 return ret;
65de872e
TM		 333}
334
335
452e9352 336static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 337{
1da177e4
LT		 338 spin_lock(&clp->cl_lock);
339 if (time_before(clp->cl_last_renewal,timestamp))
340 clp->cl_last_renewal = timestamp;
341 spin_unlock(&clp->cl_lock);
342}
343
452e9352
TM		 344static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
345{
346 do_renew_lease(server->nfs_client, timestamp);
347}
348
cccef3b9
AA		 349#if defined(CONFIG_NFS_V4_1)
350
e2c4ab3c
AA		 351/*
352 * nfs4_free_slot - free a slot and efficiently update slot table.
353 *
354 * freeing a slot is trivially done by clearing its respective bit
355 * in the bitmap.
356 * If the freed slotid equals highest_used_slotid we want to update it
357 * so that the server would be able to size down the slot table if needed,
358 * otherwise we know that the highest_used_slotid is still in use.
359 * When updating highest_used_slotid there may be "holes" in the bitmap
360 * so we need to scan down from highest_used_slotid to 0 looking for the now
361 * highest slotid in use.
362 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 363 *
364 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 365 */
366static void
dfb4f309 367nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 368{
dfb4f309 369 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 370 int slotid = free_slotid;
371
dfb4f309 372 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
375
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 379 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 380 tbl->highest_used_slotid = slotid;
381 else
382 tbl->highest_used_slotid = -1;
383 }
e2c4ab3c
AA		 384 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
385 free_slotid, tbl->highest_used_slotid);
386}
387
3bfb0fc5 388/*
42acd021 389 * Signal state manager thread if session fore channel is drained
3bfb0fc5 390 */
42acd021 391static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 392{
689cf5c1
AB		 393 struct rpc_task *task;
394
a2118c33 395 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 396 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
397 if (task)
398 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 399 return;
400 }
401
402 if (ses->fc_slot_table.highest_used_slotid != -1)
403 return;
404
42acd021
AA		 405 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
406 complete(&ses->fc_slot_table.complete);
407}
408
409/*
410 * Signal state manager thread if session back channel is drained
411 */
412void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
413{
414 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
415 ses->bc_slot_table.highest_used_slotid != -1)
416 return;
417 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
418 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 419}
420
d185a334 421static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 422{
423 struct nfs4_slot_table *tbl;
424
d185a334 425 tbl = &res->sr_session->fc_slot_table;
dfb4f309 426 if (!res->sr_slot) {
13615871
AA		 427 /* just wake up the next guy waiting since
428 * we may have not consumed a slot after all */
691daf3b 429 dprintk("%s: No slot\n", __func__);
35dc1d74 430 return;
13615871 431 }
ea028ac9 432
35dc1d74 433 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 434 nfs4_free_slot(tbl, res->sr_slot);
42acd021 435 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 436 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 437 res->sr_slot = NULL;
13615871
AA		 438}
439
14516c3a 440static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 441{
442 unsigned long timestamp;
14516c3a 443 struct nfs_client *clp;
b0df806c
AA		 444
445 /*
446 * sr_status remains 1 if an RPC level error occurred. The server
447 * may or may not have processed the sequence operation..
448 * Proceed as if the server received and processed the sequence
449 * operation.
450 */
451 if (res->sr_status == 1)
452 res->sr_status = NFS_OK;
453
468f8613
BS		 454 /* don't increment the sequence number if the task wasn't sent */
455 if (!RPC_WAS_SENT(task))
b0df806c
AA		 456 goto out;
457
691daf3b 458 /* Check the SEQUENCE operation status */
14516c3a
TM		 459 switch (res->sr_status) {
460 case 0:
b0df806c 461 /* Update the slot's sequence and clientid lease timer */
dfb4f309 462 ++res->sr_slot->seq_nr;
b0df806c 463 timestamp = res->sr_renewal_time;
14516c3a 464 clp = res->sr_session->clp;
452e9352 465 do_renew_lease(clp, timestamp);
0629e370 466 /* Check sequence flags */
b4410c2f
TM		 467 if (res->sr_status_flags != 0)
468 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 469 break;
470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
12364a4f 475 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 476 __func__,
477 res->sr_slot - res->sr_session->fc_slot_table.slots,
478 res->sr_slot->seq_nr);
14516c3a
TM		 479 goto out_retry;
480 default:
481 /* Just update the slot sequence no. */
dfb4f309 482 ++res->sr_slot->seq_nr;
b0df806c
AA		 483 }
484out:
485 /* The session may be reset by one of the error handlers. */
486 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 487 nfs41_sequence_free_slot(res);
14516c3a
TM		 488 return 1;
489out_retry:
d05dd4e9 490 if (!rpc_restart_call(task))
14516c3a
TM		 491 goto out;
492 rpc_delay(task, NFS4_POLL_RETRY_MAX);
493 return 0;
b0df806c
AA		 494}
495
14516c3a
TM		 496static int nfs4_sequence_done(struct rpc_task *task,
497 struct nfs4_sequence_res *res)
df896455 498{
14516c3a
TM		 499 if (res->sr_session == NULL)
500 return 1;
501 return nfs41_sequence_done(task, res);
df896455
TM		 502}
503
510b8175
BH		 504/*
505 * nfs4_find_slot - efficiently look for a free slot
506 *
507 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
508 * If found, we mark the slot as used, update the highest_used_slotid,
509 * and respectively set up the sequence operation args.
510 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 511 *
512 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 513 */
514static u8
40ead580 515nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 516{
517 int slotid;
518 u8 ret_id = NFS4_MAX_SLOT_TABLE;
519 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
520
510b8175
BH		 521 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
522 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
523 tbl->max_slots);
524 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
525 if (slotid >= tbl->max_slots)
526 goto out;
527 __set_bit(slotid, tbl->used_slots);
528 if (slotid > tbl->highest_used_slotid)
529 tbl->highest_used_slotid = slotid;
530 ret_id = slotid;
531out:
532 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
533 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 534 return ret_id;
535}
536
dc70d7b3 537int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 538 struct nfs4_sequence_args *args,
539 struct nfs4_sequence_res *res,
540 int cache_reply,
541 struct rpc_task *task)
542{
fbcd4abc
AA		 543 struct nfs4_slot *slot;
544 struct nfs4_slot_table *tbl;
545 u8 slotid;
546
547 dprintk("--> %s\n", __func__);
ce5039c1 548 /* slot already allocated? */
dfb4f309 549 if (res->sr_slot != NULL)
ce5039c1
AA		 550 return 0;
551
fbcd4abc
AA		 552 tbl = &session->fc_slot_table;
553
554 spin_lock(&tbl->slot_tbl_lock);
a2118c33 555 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 556 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 557 /*
558 * The state manager will wait until the slot table is empty.
559 * Schedule the reset thread
560 */
05f0d236 561 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 562 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 563 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 564 return -EAGAIN;
b069d94a
AA		 565 }
566
689cf5c1
AB		 567 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
568 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
569 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
570 spin_unlock(&tbl->slot_tbl_lock);
571 dprintk("%s enforce FIFO order\n", __func__);
572 return -EAGAIN;
573 }
574
40ead580 575 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 576 if (slotid == NFS4_MAX_SLOT_TABLE) {
577 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
578 spin_unlock(&tbl->slot_tbl_lock);
579 dprintk("<-- %s: no free slots\n", __func__);
580 return -EAGAIN;
581 }
582 spin_unlock(&tbl->slot_tbl_lock);
583
689cf5c1 584 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 585 slot = tbl->slots + slotid;
99fe60d0 586 args->sa_session = session;
fbcd4abc
AA		 587 args->sa_slotid = slotid;
588 args->sa_cache_this = cache_reply;
589
590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
591
99fe60d0 592 res->sr_session = session;
dfb4f309 593 res->sr_slot = slot;
fbcd4abc 594 res->sr_renewal_time = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
ce5039c1
AA		 601 return 0;
602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
608 int cache_reply,
609 struct rpc_task *task)
610{
035168ab 611 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 612 int ret = 0;
613
035168ab
TM		 614 if (session == NULL) {
615 args->sa_session = NULL;
616 res->sr_session = NULL;
617 goto out;
618 }
619
12364a4f 620 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 621 __func__, session->clp, session, res->sr_slot ?
622 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 623
035168ab 624 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 625 task);
ce5039c1
AA		 626out:
627 dprintk("<-- %s status=%d\n", __func__, ret);
628 return ret;
629}
630
631struct nfs41_call_sync_data {
035168ab 632 const struct nfs_server *seq_server;
ce5039c1
AA		 633 struct nfs4_sequence_args *seq_args;
634 struct nfs4_sequence_res *seq_res;
635 int cache_reply;
636};
637
638static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
639{
640 struct nfs41_call_sync_data *data = calldata;
641
035168ab
TM		 642 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
643
644 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 645 data->seq_res, data->cache_reply, task))
646 return;
647 rpc_call_start(task);
648}
649
b257957e
AB		 650static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
651{
652 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
653 nfs41_call_sync_prepare(task, calldata);
654}
655
69ab40c4
AA		 656static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
657{
658 struct nfs41_call_sync_data *data = calldata;
659
14516c3a 660 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 661}
662
ce5039c1
AA		 663struct rpc_call_ops nfs41_call_sync_ops = {
664 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 665 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 666};
667
b257957e
AB		 668struct rpc_call_ops nfs41_call_priv_sync_ops = {
669 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
670 .rpc_call_done = nfs41_call_sync_done,
671};
672
7c513058
BS		 673static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
674 struct nfs_server *server,
ce5039c1
AA		 675 struct rpc_message *msg,
676 struct nfs4_sequence_args *args,
677 struct nfs4_sequence_res *res,
b257957e
AB		 678 int cache_reply,
679 int privileged)
ce5039c1
AA		 680{
681 int ret;
682 struct rpc_task *task;
683 struct nfs41_call_sync_data data = {
035168ab 684 .seq_server = server,
ce5039c1
AA		 685 .seq_args = args,
686 .seq_res = res,
687 .cache_reply = cache_reply,
688 };
689 struct rpc_task_setup task_setup = {
7c513058 690 .rpc_client = clnt,
ce5039c1
AA		 691 .rpc_message = msg,
692 .callback_ops = &nfs41_call_sync_ops,
693 .callback_data = &data
694 };
695
dfb4f309 696 res->sr_slot = NULL;
b257957e
AB		 697 if (privileged)
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 699 task = rpc_run_task(&task_setup);
700 if (IS_ERR(task))
701 ret = PTR_ERR(task);
702 else {
703 ret = task->tk_status;
704 rpc_put_task(task);
705 }
706 return ret;
707}
708
7c513058
BS		 709int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
cccef3b9
AA		 711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
714 int cache_reply)
715{
7c513058 716 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 717}
718
df896455 719#else
14516c3a
TM		 720static int nfs4_sequence_done(struct rpc_task *task,
721 struct nfs4_sequence_res *res)
df896455 722{
14516c3a 723 return 1;
df896455 724}
cccef3b9
AA		 725#endif /* CONFIG_NFS_V4_1 */
726
7c513058
BS		 727int _nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
cccef3b9
AA		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
f3752975 734 args->sa_session = res->sr_session = NULL;
7c513058 735 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 736}
737
e73b83f2 738static inline
7c513058
BS		 739int nfs4_call_sync(struct rpc_clnt *clnt,
740 struct nfs_server *server,
e73b83f2
BS		 741 struct rpc_message *msg,
742 struct nfs4_sequence_args *args,
743 struct nfs4_sequence_res *res,
744 int cache_reply)
745{
7c513058
BS		 746 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
747 args, res, cache_reply);
e73b83f2 748}
cccef3b9 749
38478b24 750static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 751{
38478b24 752 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 753
38478b24 754 spin_lock(&dir->i_lock);
40d24704
TM		 755 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
756 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 757 nfs_force_lookup_revalidate(dir);
40d24704 758 nfsi->change_attr = cinfo->after;
38478b24 759 spin_unlock(&dir->i_lock);
1da177e4
LT		 760}
761
e56e0b78 762struct nfs4_opendata {
c6d00e63 763 struct kref kref;
e56e0b78
TM		 764 struct nfs_openargs o_arg;
765 struct nfs_openres o_res;
cdd4e68b
TM		 766 struct nfs_open_confirmargs c_arg;
767 struct nfs_open_confirmres c_res;
e56e0b78
TM		 768 struct nfs_fattr f_attr;
769 struct nfs_fattr dir_attr;
e56e0b78 770 struct dentry *dir;
82a2c1b7 771 struct dentry *dentry;
e56e0b78 772 struct nfs4_state_owner *owner;
aac00a8d 773 struct nfs4_state *state;
e56e0b78 774 struct iattr attrs;
26e976a8 775 unsigned long timestamp;
3e309914 776 unsigned int rpc_done : 1;
24ac23ab
TM		 777 int rpc_status;
778 int cancelled;
e56e0b78
TM		 779};
780
2ced46c2
TM		 781
782static void nfs4_init_opendata_res(struct nfs4_opendata *p)
783{
784 p->o_res.f_attr = &p->f_attr;
785 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 786 p->o_res.seqid = p->o_arg.seqid;
787 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 788 p->o_res.server = p->o_arg.server;
789 nfs_fattr_init(&p->f_attr);
790 nfs_fattr_init(&p->dir_attr);
791}
792
82a2c1b7 793static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 794 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 795 const struct iattr *attrs,
796 gfp_t gfp_mask)
e56e0b78 797{
82a2c1b7 798 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 799 struct inode *dir = parent->d_inode;
800 struct nfs_server *server = NFS_SERVER(dir);
801 struct nfs4_opendata *p;
802
8535b2be 803 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 804 if (p == NULL)
805 goto err;
8535b2be 806 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 807 if (p->o_arg.seqid == NULL)
808 goto err_free;
82a2c1b7
AV		 809 nfs_sb_active(dentry->d_sb);
810 p->dentry = dget(dentry);
e56e0b78
TM		 811 p->dir = parent;
812 p->owner = sp;
813 atomic_inc(&sp->so_count);
814 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 815 p->o_arg.open_flags = flags;
816 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 817 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 818 p->o_arg.id = sp->so_owner_id.id;
82a2c1b7 819 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 820 p->o_arg.server = server;
821 p->o_arg.bitmask = server->attr_bitmask;
822 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 823 if (flags & O_CREAT) {
824 u32 *s;
825
e56e0b78
TM		 826 p->o_arg.u.attrs = &p->attrs;
827 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 828 s = (u32 *) p->o_arg.u.verifier.data;
829 s[0] = jiffies;
830 s[1] = current->pid;
e56e0b78 831 }
cdd4e68b
TM		 832 p->c_arg.fh = &p->o_res.fh;
833 p->c_arg.stateid = &p->o_res.stateid;
834 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 835 nfs4_init_opendata_res(p);
c6d00e63 836 kref_init(&p->kref);
e56e0b78
TM		 837 return p;
838err_free:
839 kfree(p);
840err:
841 dput(parent);
842 return NULL;
843}
844
c6d00e63 845static void nfs4_opendata_free(struct kref *kref)
e56e0b78 846{
c6d00e63
TM		 847 struct nfs4_opendata *p = container_of(kref,
848 struct nfs4_opendata, kref);
82a2c1b7 849 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 850
851 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 852 if (p->state != NULL)
853 nfs4_put_open_state(p->state);
c6d00e63
TM		 854 nfs4_put_state_owner(p->owner);
855 dput(p->dir);
82a2c1b7
AV		 856 dput(p->dentry);
857 nfs_sb_deactive(sb);
c6d00e63
TM		 858 kfree(p);
859}
860
861static void nfs4_opendata_put(struct nfs4_opendata *p)
862{
863 if (p != NULL)
864 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 865}
866
06f814a3
TM		 867static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
868{
06f814a3
TM		 869 int ret;
870
06f814a3 871 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 872 return ret;
873}
874
dc0b027d 875static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 876{
877 int ret = 0;
dc0b027d
TM		 878
879 if (open_mode & O_EXCL)
880 goto out;
881 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 882 case FMODE_READ:
88069f77
TM		 883 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
884 && state->n_rdonly != 0;
6ee41268
TM		 885 break;
886 case FMODE_WRITE:
88069f77
TM		 887 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
888 && state->n_wronly != 0;
6ee41268
TM		 889 break;
890 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 891 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
892 && state->n_rdwr != 0;
6ee41268 893 }
dc0b027d 894out:
6ee41268
TM		 895 return ret;
896}
897
dc0b027d 898static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 899{
dc0b027d 900 if ((delegation->type & fmode) != fmode)
aac00a8d 901 return 0;
15c831bf 902 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 903 return 0;
b7391f44 904 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 905 return 1;
906}
907
dc0b027d 908static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 909{
dc0b027d 910 switch (fmode) {
e7616923
TM		 911 case FMODE_WRITE:
912 state->n_wronly++;
913 break;
914 case FMODE_READ:
915 state->n_rdonly++;
916 break;
917 case FMODE_READ|FMODE_WRITE:
918 state->n_rdwr++;
919 }
dc0b027d 920 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 921}
922
dc0b027d 923static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 924{
925 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
926 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
927 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 928 switch (fmode) {
003707c7
TM		 929 case FMODE_READ:
930 set_bit(NFS_O_RDONLY_STATE, &state->flags);
931 break;
932 case FMODE_WRITE:
933 set_bit(NFS_O_WRONLY_STATE, &state->flags);
934 break;
935 case FMODE_READ|FMODE_WRITE:
936 set_bit(NFS_O_RDWR_STATE, &state->flags);
937 }
e7616923
TM		 938}
939
dc0b027d 940static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 941{
8bda4e4c 942 write_seqlock(&state->seqlock);
dc0b027d 943 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 944 write_sequnlock(&state->seqlock);
003707c7
TM		 945}
946
dc0b027d 947static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 948{
8bda4e4c
TM		 949 /*
950 * Protect the call to nfs4_state_set_mode_locked and
951 * serialise the stateid update
952 */
953 write_seqlock(&state->seqlock);
003707c7
TM		 954 if (deleg_stateid != NULL) {
955 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
956 set_bit(NFS_DELEGATED_STATE, &state->flags);
957 }
958 if (open_stateid != NULL)
dc0b027d 959 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 960 write_sequnlock(&state->seqlock);
961 spin_lock(&state->owner->so_lock);
dc0b027d 962 update_open_stateflags(state, fmode);
ec073428 963 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 964}
965
dc0b027d 966static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 967{
968 struct nfs_inode *nfsi = NFS_I(state->inode);
969 struct nfs_delegation *deleg_cur;
970 int ret = 0;
971
dc0b027d 972 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 973
974 rcu_read_lock();
975 deleg_cur = rcu_dereference(nfsi->delegation);
976 if (deleg_cur == NULL)
977 goto no_delegation;
978
979 spin_lock(&deleg_cur->lock);
980 if (nfsi->delegation != deleg_cur ||
dc0b027d 981 (deleg_cur->type & fmode) != fmode)
34310430
TM		 982 goto no_delegation_unlock;
983
984 if (delegation == NULL)
985 delegation = &deleg_cur->stateid;
986 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
987 goto no_delegation_unlock;
988
b7391f44 989 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 990 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 991 ret = 1;
992no_delegation_unlock:
993 spin_unlock(&deleg_cur->lock);
994no_delegation:
995 rcu_read_unlock();
996
997 if (!ret && open_stateid != NULL) {
dc0b027d 998 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 999 ret = 1;
1000 }
1001
1002 return ret;
1003}
1004
1005
dc0b027d 1006static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1007{
1008 struct nfs_delegation *delegation;
1009
1010 rcu_read_lock();
1011 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1012 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1013 rcu_read_unlock();
1014 return;
1015 }
1016 rcu_read_unlock();
1017 nfs_inode_return_delegation(inode);
1018}
1019
6ee41268 1020static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1021{
1022 struct nfs4_state *state = opendata->state;
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *delegation;
dc0b027d
TM		 1025 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1026 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1027 nfs4_stateid stateid;
1028 int ret = -EAGAIN;
1029
aac00a8d 1030 for (;;) {
dc0b027d 1031 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1032 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1033 if (can_open_cached(state, fmode, open_mode)) {
1034 update_open_stateflags(state, fmode);
6ee41268 1035 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1036 goto out_return_state;
1037 }
1038 spin_unlock(&state->owner->so_lock);
1039 }
34310430
TM		 1040 rcu_read_lock();
1041 delegation = rcu_dereference(nfsi->delegation);
1042 if (delegation == NULL ||
dc0b027d 1043 !can_open_delegated(delegation, fmode)) {
34310430 1044 rcu_read_unlock();
aac00a8d 1045 break;
34310430 1046 }
aac00a8d
TM		 1047 /* Save the delegation */
1048 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1049 rcu_read_unlock();
af22f94a 1050 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1051 if (ret != 0)
1052 goto out;
1053 ret = -EAGAIN;
34310430
TM		 1054
1055 /* Try to update the stateid using the delegation */
dc0b027d 1056 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1057 goto out_return_state;
aac00a8d 1058 }
aac00a8d
TM		 1059out:
1060 return ERR_PTR(ret);
1061out_return_state:
1062 atomic_inc(&state->count);
1063 return state;
1064}
1065
24ac23ab
TM		 1066static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1067{
1068 struct inode *inode;
1069 struct nfs4_state *state = NULL;
003707c7 1070 struct nfs_delegation *delegation;
1b370bc2 1071 int ret;
24ac23ab 1072
aac00a8d 1073 if (!data->rpc_done) {
6ee41268 1074 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1075 goto out;
1076 }
1077
1b370bc2 1078 ret = -EAGAIN;
24ac23ab 1079 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1080 goto err;
24ac23ab 1081 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1082 ret = PTR_ERR(inode);
03f28e3a 1083 if (IS_ERR(inode))
1b370bc2
TM		 1084 goto err;
1085 ret = -ENOMEM;
24ac23ab
TM		 1086 state = nfs4_get_open_state(inode, data->owner);
1087 if (state == NULL)
1b370bc2 1088 goto err_put_inode;
549d6ed5 1089 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1090 int delegation_flags = 0;
1091
003707c7
TM		 1092 rcu_read_lock();
1093 delegation = rcu_dereference(NFS_I(inode)->delegation);
1094 if (delegation)
1095 delegation_flags = delegation->flags;
1096 rcu_read_unlock();
15c831bf 1097 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1098 nfs_inode_set_delegation(state->inode,
1099 data->owner->so_cred,
1100 &data->o_res);
1101 else
1102 nfs_inode_reclaim_delegation(state->inode,
1103 data->owner->so_cred,
1104 &data->o_res);
1105 }
34310430
TM		 1106
1107 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1108 data->o_arg.fmode);
24ac23ab 1109 iput(inode);
aac00a8d 1110out:
24ac23ab 1111 return state;
1b370bc2
TM		 1112err_put_inode:
1113 iput(inode);
1114err:
1115 return ERR_PTR(ret);
24ac23ab
TM		 1116}
1117
864472e9
TM		 1118static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1119{
1120 struct nfs_inode *nfsi = NFS_I(state->inode);
1121 struct nfs_open_context *ctx;
1122
1123 spin_lock(&state->inode->i_lock);
1124 list_for_each_entry(ctx, &nfsi->open_files, list) {
1125 if (ctx->state != state)
1126 continue;
1127 get_nfs_open_context(ctx);
1128 spin_unlock(&state->inode->i_lock);
1129 return ctx;
1130 }
1131 spin_unlock(&state->inode->i_lock);
1132 return ERR_PTR(-ENOENT);
1133}
1134
6f220ed5
TM		 1135static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1136{
1137 struct nfs4_opendata *opendata;
1138
3d4ff43d 1139 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1140 if (opendata == NULL)
1141 return ERR_PTR(-ENOMEM);
1142 opendata->state = state;
1143 atomic_inc(&state->count);
1144 return opendata;
1145}
1146
dc0b027d 1147static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1148{
2ced46c2 1149 struct nfs4_state *newstate;
864472e9
TM		 1150 int ret;
1151
dc0b027d
TM		 1152 opendata->o_arg.open_flags = 0;
1153 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1154 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1155 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1156 nfs4_init_opendata_res(opendata);
b257957e 1157 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1158 if (ret != 0)
1159 return ret;
2ced46c2 1160 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1161 if (IS_ERR(newstate))
1162 return PTR_ERR(newstate);
643168c2 1163 nfs4_close_state(newstate, fmode);
2ced46c2 1164 *res = newstate;
864472e9
TM		 1165 return 0;
1166}
1167
1168static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1169{
864472e9 1170 struct nfs4_state *newstate;
864472e9
TM		 1171 int ret;
1172
1173 /* memory barrier prior to reading state->n_* */
2ced46c2 1174 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1175 smp_rmb();
1176 if (state->n_rdwr != 0) {
b0ed9dbc 1177 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1178 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1179 if (ret != 0)
1180 return ret;
2ced46c2
TM		 1181 if (newstate != state)
1182 return -ESTALE;
864472e9
TM		 1183 }
1184 if (state->n_wronly != 0) {
b0ed9dbc 1185 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1186 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1187 if (ret != 0)
1188 return ret;
2ced46c2
TM		 1189 if (newstate != state)
1190 return -ESTALE;
864472e9
TM		 1191 }
1192 if (state->n_rdonly != 0) {
b0ed9dbc 1193 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1194 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1195 if (ret != 0)
1196 return ret;
2ced46c2
TM		 1197 if (newstate != state)
1198 return -ESTALE;
864472e9 1199 }
1ac7e2fd
TM		 1200 /*
1201 * We may have performed cached opens for all three recoveries.
1202 * Check if we need to update the current stateid.
1203 */
1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1205 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1206 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1207 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1208 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1209 write_sequnlock(&state->seqlock);
1ac7e2fd 1210 }
864472e9
TM		 1211 return 0;
1212}
1213
1da177e4
LT		 1214/*
1215 * OPEN_RECLAIM:
1216 * reclaim state on the server after a reboot.
1da177e4 1217 */
539cd03a 1218static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1219{
1ac7e2fd 1220 struct nfs_delegation *delegation;
864472e9 1221 struct nfs4_opendata *opendata;
dc0b027d 1222 fmode_t delegation_type = 0;
1da177e4
LT		 1223 int status;
1224
6f220ed5
TM		 1225 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1226 if (IS_ERR(opendata))
1227 return PTR_ERR(opendata);
864472e9
TM		 1228 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1229 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1230 rcu_read_lock();
1231 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1232 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1233 delegation_type = delegation->type;
1ac7e2fd 1234 rcu_read_unlock();
864472e9
TM		 1235 opendata->o_arg.u.delegation_type = delegation_type;
1236 status = nfs4_open_recover(opendata, state);
c6d00e63 1237 nfs4_opendata_put(opendata);
1da177e4
LT		 1238 return status;
1239}
1240
539cd03a 1241static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1242{
1243 struct nfs_server *server = NFS_SERVER(state->inode);
1244 struct nfs4_exception exception = { };
1245 int err;
1246 do {
539cd03a 1247 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1248 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1249 break;
1250 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1251 } while (exception.retry);
1252 return err;
1253}
1254
864472e9
TM		 1255static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1256{
1257 struct nfs_open_context *ctx;
1258 int ret;
1259
1260 ctx = nfs4_state_find_open_context(state);
1261 if (IS_ERR(ctx))
1262 return PTR_ERR(ctx);
539cd03a 1263 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1264 put_nfs_open_context(ctx);
1265 return ret;
1266}
1267
13437e12 1268static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1269{
e56e0b78 1270 struct nfs4_opendata *opendata;
864472e9 1271 int ret;
1da177e4 1272
6f220ed5
TM		 1273 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1274 if (IS_ERR(opendata))
1275 return PTR_ERR(opendata);
e56e0b78 1276 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1277 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1278 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1279 ret = nfs4_open_recover(opendata, state);
c6d00e63 1280 nfs4_opendata_put(opendata);
864472e9 1281 return ret;
1da177e4
LT		 1282}
1283
13437e12 1284int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1285{
1286 struct nfs4_exception exception = { };
539cd03a 1287 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1288 int err;
1289 do {
13437e12 1290 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1291 switch (err) {
1292 case 0:
965b5d67
TM		 1293 case -ENOENT:
1294 case -ESTALE:
1295 goto out;
bcfa49f6
RL		 1296 case -NFS4ERR_BADSESSION:
1297 case -NFS4ERR_BADSLOT:
1298 case -NFS4ERR_BAD_HIGH_SLOT:
1299 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1300 case -NFS4ERR_DEADSESSION:
0400a6b0 1301 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1302 goto out;
1da177e4
LT		 1303 case -NFS4ERR_STALE_CLIENTID:
1304 case -NFS4ERR_STALE_STATEID:
1305 case -NFS4ERR_EXPIRED:
1306 /* Don't recall a delegation if it was lost */
0400a6b0 1307 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1308 goto out;
1309 case -ERESTARTSYS:
1310 /*
1311 * The show must go on: exit, but mark the
1312 * stateid as needing recovery.
1313 */
1314 case -NFS4ERR_ADMIN_REVOKED:
1315 case -NFS4ERR_BAD_STATEID:
0400a6b0 1316 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1317 case -EKEYEXPIRED:
1318 /*
1319 * User RPCSEC_GSS context has expired.
1320 * We cannot recover this stateid now, so
1321 * skip it and allow recovery thread to
1322 * proceed.
1323 */
965b5d67
TM		 1324 case -ENOMEM:
1325 err = 0;
1326 goto out;
1da177e4
LT		 1327 }
1328 err = nfs4_handle_exception(server, err, &exception);
1329 } while (exception.retry);
965b5d67 1330out:
1da177e4
LT		 1331 return err;
1332}
1333
cdd4e68b
TM		 1334static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1335{
1336 struct nfs4_opendata *data = calldata;
1337
1338 data->rpc_status = task->tk_status;
26e976a8 1339 if (data->rpc_status == 0) {
cdd4e68b
TM		 1340 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1341 sizeof(data->o_res.stateid.data));
bb22629e 1342 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1343 renew_lease(data->o_res.server, data->timestamp);
3e309914 1344 data->rpc_done = 1;
26e976a8 1345 }
cdd4e68b
TM		 1346}
1347
1348static void nfs4_open_confirm_release(void *calldata)
1349{
1350 struct nfs4_opendata *data = calldata;
1351 struct nfs4_state *state = NULL;
1352
1353 /* If this request hasn't been cancelled, do nothing */
1354 if (data->cancelled == 0)
1355 goto out_free;
1356 /* In case of error, no cleanup! */
3e309914 1357 if (!data->rpc_done)
cdd4e68b 1358 goto out_free;
cdd4e68b 1359 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1360 if (!IS_ERR(state))
643168c2 1361 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1362out_free:
c6d00e63 1363 nfs4_opendata_put(data);
cdd4e68b
TM		 1364}
1365
1366static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1367 .rpc_call_done = nfs4_open_confirm_done,
1368 .rpc_release = nfs4_open_confirm_release,
1369};
1370
1371/*
1372 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1373 */
1374static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1375{
1376 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1377 struct rpc_task *task;
5138fde0
TM		 1378 struct rpc_message msg = {
1379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1380 .rpc_argp = &data->c_arg,
1381 .rpc_resp = &data->c_res,
1382 .rpc_cred = data->owner->so_cred,
1383 };
c970aa85
TM		 1384 struct rpc_task_setup task_setup_data = {
1385 .rpc_client = server->client,
5138fde0 1386 .rpc_message = &msg,
c970aa85
TM		 1387 .callback_ops = &nfs4_open_confirm_ops,
1388 .callback_data = data,
101070ca 1389 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1390 .flags = RPC_TASK_ASYNC,
1391 };
1da177e4
LT		 1392 int status;
1393
c6d00e63 1394 kref_get(&data->kref);
3e309914
TM		 1395 data->rpc_done = 0;
1396 data->rpc_status = 0;
5138fde0 1397 data->timestamp = jiffies;
c970aa85 1398 task = rpc_run_task(&task_setup_data);
7a1218a2 1399 if (IS_ERR(task))
cdd4e68b 1400 return PTR_ERR(task);
cdd4e68b
TM		 1401 status = nfs4_wait_for_completion_rpc_task(task);
1402 if (status != 0) {
1403 data->cancelled = 1;
1404 smp_wmb();
1405 } else
1406 status = data->rpc_status;
e6b3c4db 1407 rpc_put_task(task);
1da177e4
LT		 1408 return status;
1409}
1410
24ac23ab 1411static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1412{
24ac23ab
TM		 1413 struct nfs4_opendata *data = calldata;
1414 struct nfs4_state_owner *sp = data->owner;
5138fde0 1415
24ac23ab
TM		 1416 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1417 return;
aac00a8d
TM		 1418 /*
1419 * Check if we still need to send an OPEN call, or if we can use
1420 * a delegation instead.
1421 */
1422 if (data->state != NULL) {
1423 struct nfs_delegation *delegation;
1424
dc0b027d 1425 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1426 goto out_no_action;
aac00a8d
TM		 1427 rcu_read_lock();
1428 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1429 if (delegation != NULL &&
15c831bf 1430 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1431 rcu_read_unlock();
6ee41268 1432 goto out_no_action;
aac00a8d
TM		 1433 }
1434 rcu_read_unlock();
1435 }
24ac23ab 1436 /* Update sequence id. */
9f958ab8 1437 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1438 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1439 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1440 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1441 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1442 }
26e976a8 1443 data->timestamp = jiffies;
035168ab 1444 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1445 &data->o_arg.seq_args,
1446 &data->o_res.seq_res, 1, task))
1447 return;
5138fde0 1448 rpc_call_start(task);
6ee41268
TM		 1449 return;
1450out_no_action:
1451 task->tk_action = NULL;
1452
24ac23ab 1453}
1da177e4 1454
b257957e
AB		 1455static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1456{
1457 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1458 nfs4_open_prepare(task, calldata);
1459}
1460
24ac23ab
TM		 1461static void nfs4_open_done(struct rpc_task *task, void *calldata)
1462{
1463 struct nfs4_opendata *data = calldata;
1da177e4 1464
24ac23ab 1465 data->rpc_status = task->tk_status;
d898528c 1466
14516c3a
TM		 1467 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1468 return;
d898528c 1469
24ac23ab
TM		 1470 if (task->tk_status == 0) {
1471 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1472 case S_IFREG:
1473 break;
1474 case S_IFLNK:
24ac23ab 1475 data->rpc_status = -ELOOP;
6f926b5b
TM		 1476 break;
1477 case S_IFDIR:
24ac23ab 1478 data->rpc_status = -EISDIR;
6f926b5b
TM		 1479 break;
1480 default:
24ac23ab 1481 data->rpc_status = -ENOTDIR;
6f926b5b 1482 }
26e976a8 1483 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1484 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1485 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1486 }
3e309914 1487 data->rpc_done = 1;
24ac23ab 1488}
6f926b5b 1489
24ac23ab
TM		 1490static void nfs4_open_release(void *calldata)
1491{
1492 struct nfs4_opendata *data = calldata;
1493 struct nfs4_state *state = NULL;
1494
1495 /* If this request hasn't been cancelled, do nothing */
1496 if (data->cancelled == 0)
1497 goto out_free;
1498 /* In case of error, no cleanup! */
3e309914 1499 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1500 goto out_free;
1501 /* In case we need an open_confirm, no cleanup! */
1502 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1503 goto out_free;
24ac23ab 1504 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1505 if (!IS_ERR(state))
643168c2 1506 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1507out_free:
c6d00e63 1508 nfs4_opendata_put(data);
24ac23ab
TM		 1509}
1510
1511static const struct rpc_call_ops nfs4_open_ops = {
1512 .rpc_call_prepare = nfs4_open_prepare,
1513 .rpc_call_done = nfs4_open_done,
1514 .rpc_release = nfs4_open_release,
1515};
1516
b257957e
AB		 1517static const struct rpc_call_ops nfs4_recover_open_ops = {
1518 .rpc_call_prepare = nfs4_recover_open_prepare,
1519 .rpc_call_done = nfs4_open_done,
1520 .rpc_release = nfs4_open_release,
1521};
1522
1523static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1524{
1525 struct inode *dir = data->dir->d_inode;
1526 struct nfs_server *server = NFS_SERVER(dir);
1527 struct nfs_openargs *o_arg = &data->o_arg;
1528 struct nfs_openres *o_res = &data->o_res;
1529 struct rpc_task *task;
5138fde0
TM		 1530 struct rpc_message msg = {
1531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1532 .rpc_argp = o_arg,
1533 .rpc_resp = o_res,
1534 .rpc_cred = data->owner->so_cred,
1535 };
c970aa85
TM		 1536 struct rpc_task_setup task_setup_data = {
1537 .rpc_client = server->client,
5138fde0 1538 .rpc_message = &msg,
c970aa85
TM		 1539 .callback_ops = &nfs4_open_ops,
1540 .callback_data = data,
101070ca 1541 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1542 .flags = RPC_TASK_ASYNC,
1543 };
24ac23ab
TM		 1544 int status;
1545
c6d00e63 1546 kref_get(&data->kref);
3e309914
TM		 1547 data->rpc_done = 0;
1548 data->rpc_status = 0;
2ced46c2 1549 data->cancelled = 0;
b257957e
AB		 1550 if (isrecover)
1551 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1552 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1553 if (IS_ERR(task))
1554 return PTR_ERR(task);
1555 status = nfs4_wait_for_completion_rpc_task(task);
1556 if (status != 0) {
1557 data->cancelled = 1;
1558 smp_wmb();
1559 } else
1560 status = data->rpc_status;
1561 rpc_put_task(task);
1562
1563 return status;
1564}
1565
1566static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1567{
1568 struct inode *dir = data->dir->d_inode;
1569 struct nfs_openres *o_res = &data->o_res;
1570 int status;
1571
1572 status = nfs4_run_open_task(data, 1);
1573 if (status != 0 || !data->rpc_done)
1574 return status;
1575
1576 nfs_refresh_inode(dir, o_res->dir_attr);
1577
1578 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1579 status = _nfs4_proc_open_confirm(data);
1580 if (status != 0)
1581 return status;
1582 }
1583
1584 return status;
1585}
1586
1587/*
1588 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1589 */
1590static int _nfs4_proc_open(struct nfs4_opendata *data)
1591{
1592 struct inode *dir = data->dir->d_inode;
1593 struct nfs_server *server = NFS_SERVER(dir);
1594 struct nfs_openargs *o_arg = &data->o_arg;
1595 struct nfs_openres *o_res = &data->o_res;
1596 int status;
1597
1598 status = nfs4_run_open_task(data, 0);
3e309914 1599 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1600 return status;
1601
56ae19f3
TM		 1602 if (o_arg->open_flags & O_CREAT) {
1603 update_changeattr(dir, &o_res->cinfo);
1604 nfs_post_op_update_inode(dir, o_res->dir_attr);
1605 } else
1606 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1607 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1608 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1609 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1610 status = _nfs4_proc_open_confirm(data);
1da177e4 1611 if (status != 0)
24ac23ab 1612 return status;
1da177e4
LT		 1613 }
1614 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1615 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1616 return 0;
1da177e4
LT		 1617}
1618
d83217c1 1619static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1620{
a78cb57a 1621 unsigned int loop;
6b30954e 1622 int ret;
58d9714a 1623
a78cb57a 1624 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1625 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1626 if (ret != 0)
a78cb57a 1627 break;
e598d843
TM		 1628 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1629 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1630 break;
0400a6b0 1631 nfs4_schedule_state_manager(clp);
a78cb57a 1632 ret = -EIO;
6b30954e 1633 }
a78cb57a 1634 return ret;
58d9714a
TM		 1635}
1636
d83217c1
AA		 1637static int nfs4_recover_expired_lease(struct nfs_server *server)
1638{
1639 return nfs4_client_recover_expired_lease(server->nfs_client);
1640}
1641
1da177e4
LT		 1642/*
1643 * OPEN_EXPIRED:
1644 * reclaim state on the server after a network partition.
1645 * Assumes caller holds the appropriate lock
1646 */
539cd03a 1647static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1648{
e56e0b78 1649 struct nfs4_opendata *opendata;
864472e9 1650 int ret;
1da177e4 1651
6f220ed5
TM		 1652 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1653 if (IS_ERR(opendata))
1654 return PTR_ERR(opendata);
864472e9 1655 ret = nfs4_open_recover(opendata, state);
35d05778 1656 if (ret == -ESTALE)
3d4ff43d 1657 d_drop(ctx->dentry);
c6d00e63 1658 nfs4_opendata_put(opendata);
864472e9 1659 return ret;
1da177e4
LT		 1660}
1661
a9ed2e25 1662static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1663{
539cd03a 1664 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1665 struct nfs4_exception exception = { };
1666 int err;
1667
1668 do {
539cd03a 1669 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1670 switch (err) {
1671 default:
1672 goto out;
1673 case -NFS4ERR_GRACE:
1674 case -NFS4ERR_DELAY:
1675 nfs4_handle_exception(server, err, &exception);
1676 err = 0;
1677 }
202b50dc 1678 } while (exception.retry);
a9ed2e25 1679out:
202b50dc
TM		 1680 return err;
1681}
1682
1da177e4
LT		 1683static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1684{
1da177e4 1685 struct nfs_open_context *ctx;
864472e9 1686 int ret;
1da177e4 1687
864472e9
TM		 1688 ctx = nfs4_state_find_open_context(state);
1689 if (IS_ERR(ctx))
1690 return PTR_ERR(ctx);
539cd03a 1691 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1692 put_nfs_open_context(ctx);
1693 return ret;
1da177e4
LT		 1694}
1695
f062eb6c
BS		 1696#if defined(CONFIG_NFS_V4_1)
1697static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1698{
1699 int status;
1700 struct nfs_server *server = NFS_SERVER(state->inode);
1701
1702 status = nfs41_test_stateid(server, state);
1703 if (status == NFS_OK)
1704 return 0;
1705 nfs41_free_stateid(server, state);
1706 return nfs4_open_expired(sp, state);
1707}
1708#endif
1709
aa53ed54
JL		 1710/*
1711 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1712 * fields corresponding to attributes that were used to store the verifier.
1713 * Make sure we clobber those fields in the later setattr call
1714 */
1715static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1716{
1717 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1718 !(sattr->ia_valid & ATTR_ATIME_SET))
1719 sattr->ia_valid |= ATTR_ATIME;
1720
1721 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1722 !(sattr->ia_valid & ATTR_MTIME_SET))
1723 sattr->ia_valid |= ATTR_MTIME;
1724}
1725
1da177e4 1726/*
24ac23ab 1727 * Returns a referenced nfs4_state
1da177e4 1728 */
82a2c1b7 1729static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1730{
1731 struct nfs4_state_owner *sp;
1732 struct nfs4_state *state = NULL;
1733 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1734 struct nfs4_opendata *opendata;
aac00a8d 1735 int status;
1da177e4
LT		 1736
1737 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1738 status = -ENOMEM;
1739 if (!(sp = nfs4_get_state_owner(server, cred))) {
1740 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1741 goto out_err;
1742 }
58d9714a
TM		 1743 status = nfs4_recover_expired_lease(server);
1744 if (status != 0)
b4454fe1 1745 goto err_put_state_owner;
82a2c1b7
AV		 1746 if (dentry->d_inode != NULL)
1747 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1748 status = -ENOMEM;
82a2c1b7 1749 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1750 if (opendata == NULL)
95d35cb4 1751 goto err_put_state_owner;
1da177e4 1752
82a2c1b7
AV		 1753 if (dentry->d_inode != NULL)
1754 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1755
24ac23ab 1756 status = _nfs4_proc_open(opendata);
1da177e4 1757 if (status != 0)
c6d00e63 1758 goto err_opendata_put;
1da177e4 1759
24ac23ab 1760 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1761 status = PTR_ERR(state);
1762 if (IS_ERR(state))
c6d00e63 1763 goto err_opendata_put;
0df5dd4a 1764 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1765 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1766
1767 if (opendata->o_arg.open_flags & O_EXCL) {
1768 nfs4_exclusive_attrset(opendata, sattr);
1769
1770 nfs_fattr_init(opendata->o_res.f_attr);
1771 status = nfs4_do_setattr(state->inode, cred,
1772 opendata->o_res.f_attr, sattr,
1773 state);
1774 if (status == 0)
1775 nfs_setattr_update_inode(state->inode, sattr);
1776 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1777 }
c6d00e63 1778 nfs4_opendata_put(opendata);
1da177e4 1779 nfs4_put_state_owner(sp);
1da177e4
LT		 1780 *res = state;
1781 return 0;
c6d00e63
TM		 1782err_opendata_put:
1783 nfs4_opendata_put(opendata);
e56e0b78
TM		 1784err_put_state_owner:
1785 nfs4_put_state_owner(sp);
1da177e4 1786out_err:
1da177e4
LT		 1787 *res = NULL;
1788 return status;
1789}
1790
1791
82a2c1b7 1792static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1793{
1794 struct nfs4_exception exception = { };
1795 struct nfs4_state *res;
1796 int status;
1797
1798 do {
82a2c1b7 1799 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1800 if (status == 0)
1801 break;
1802 /* NOTE: BAD_SEQID means the server and client disagree about the
1803 * book-keeping w.r.t. state-changing operations
1804 * (OPEN/CLOSE/LOCK/LOCKU...)
1805 * It is actually a sign of a bug on the client or on the server.
1806 *
1807 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1808 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1809 * have unhashed the old state_owner for us, and that we can
1810 * therefore safely retry using a new one. We should still warn
1811 * the user though...
1812 */
1813 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1814 printk(KERN_WARNING "NFS: v4 server %s "
1815 " returned a bad sequence-id error!\n",
1816 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1817 exception.retry = 1;
1818 continue;
1819 }
550f5747
TM		 1820 /*
1821 * BAD_STATEID on OPEN means that the server cancelled our
1822 * state before it received the OPEN_CONFIRM.
1823 * Recover by retrying the request as per the discussion
1824 * on Page 181 of RFC3530.
1825 */
1826 if (status == -NFS4ERR_BAD_STATEID) {
1827 exception.retry = 1;
1828 continue;
1829 }
aac00a8d
TM		 1830 if (status == -EAGAIN) {
1831 /* We must have found a delegation */
1832 exception.retry = 1;
1833 continue;
1834 }
1da177e4
LT		 1835 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1836 status, &exception));
1837 } while (exception.retry);
1838 return res;
1839}
1840
659bfcd6
TM		 1841static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1842 struct nfs_fattr *fattr, struct iattr *sattr,
1843 struct nfs4_state *state)
1da177e4 1844{
3e4f6290 1845 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1846 struct nfs_setattrargs arg = {
3e4f6290 1847 .fh = NFS_FH(inode),
1da177e4
LT		 1848 .iap = sattr,
1849 .server = server,
1850 .bitmask = server->attr_bitmask,
1851 };
1852 struct nfs_setattrres res = {
1853 .fattr = fattr,
1854 .server = server,
1855 };
1856 struct rpc_message msg = {
659bfcd6
TM		 1857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1858 .rpc_argp = &arg,
1859 .rpc_resp = &res,
1860 .rpc_cred = cred,
1da177e4 1861 };
26e976a8 1862 unsigned long timestamp = jiffies;
65e4308d 1863 int status;
1da177e4 1864
0e574af1 1865 nfs_fattr_init(fattr);
1da177e4 1866
3e4f6290
TM		 1867 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1868 /* Use that stateid */
1869 } else if (state != NULL) {
77041ed9 1870 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1871 } else
1da177e4
LT		 1872 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1873
7c513058 1874 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1875 if (status == 0 && state != NULL)
1876 renew_lease(server, timestamp);
65e4308d 1877 return status;
1da177e4
LT		 1878}
1879
659bfcd6
TM		 1880static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1881 struct nfs_fattr *fattr, struct iattr *sattr,
1882 struct nfs4_state *state)
1da177e4 1883{
3e4f6290 1884 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1885 struct nfs4_exception exception = { };
1886 int err;
1887 do {
1888 err = nfs4_handle_exception(server,
659bfcd6 1889 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1890 &exception);
1891 } while (exception.retry);
1892 return err;
1893}
1894
1895struct nfs4_closedata {
1896 struct inode *inode;
1897 struct nfs4_state *state;
1898 struct nfs_closeargs arg;
1899 struct nfs_closeres res;
516a6af6 1900 struct nfs_fattr fattr;
26e976a8 1901 unsigned long timestamp;
f7e8917a
FI		 1902 bool roc;
1903 u32 roc_barrier;
1da177e4
LT		 1904};
1905
963d8fe5 1906static void nfs4_free_closedata(void *data)
9512135d 1907{
963d8fe5
TM		 1908 struct nfs4_closedata *calldata = data;
1909 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 1910 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 1911
f7e8917a
FI		 1912 if (calldata->roc)
1913 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1914 nfs4_put_open_state(calldata->state);
1915 nfs_free_seqid(calldata->arg.seqid);
9512135d 1916 nfs4_put_state_owner(sp);
643168c2 1917 nfs_sb_deactive(sb);
9512135d
TM		 1918 kfree(calldata);
1919}
1920
88069f77
TM		 1921static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1922 fmode_t fmode)
1923{
1924 spin_lock(&state->owner->so_lock);
1925 if (!(fmode & FMODE_READ))
1926 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1927 if (!(fmode & FMODE_WRITE))
1928 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1929 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1930 spin_unlock(&state->owner->so_lock);
1931}
1932
963d8fe5 1933static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1934{
963d8fe5 1935 struct nfs4_closedata *calldata = data;
1da177e4 1936 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1937 struct nfs_server *server = NFS_SERVER(calldata->inode);
1938
14516c3a
TM		 1939 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1940 return;
1da177e4
LT		 1941 /* hmm. we are done with the inode, and in the process of freeing
1942 * the state_owner. we keep this around to process errors
1943 */
1da177e4
LT		 1944 switch (task->tk_status) {
1945 case 0:
f7e8917a
FI		 1946 if (calldata->roc)
1947 pnfs_roc_set_barrier(state->inode,
1948 calldata->roc_barrier);
45328c35 1949 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1950 renew_lease(server, calldata->timestamp);
88069f77
TM		 1951 nfs4_close_clear_stateid_flags(state,
1952 calldata->arg.fmode);
1da177e4
LT		 1953 break;
1954 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1955 case -NFS4ERR_OLD_STATEID:
1956 case -NFS4ERR_BAD_STATEID:
1da177e4 1957 case -NFS4ERR_EXPIRED:
dc0b027d 1958 if (calldata->arg.fmode == 0)
9e33bed5 1959 break;
1da177e4 1960 default:
72211dbe
TM		 1961 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1962 rpc_restart_call_prepare(task);
1da177e4 1963 }
72211dbe 1964 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1965 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1966}
1967
4ce70ada 1968static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1969{
4ce70ada 1970 struct nfs4_closedata *calldata = data;
9512135d 1971 struct nfs4_state *state = calldata->state;
88069f77 1972 int call_close = 0;
9512135d 1973
963d8fe5 1974 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1975 return;
003707c7 1976
88069f77
TM		 1977 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1978 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1979 spin_lock(&state->owner->so_lock);
003707c7 1980 /* Calculate the change in open mode */
e7616923 1981 if (state->n_rdwr == 0) {
003707c7 1982 if (state->n_rdonly == 0) {
88069f77
TM		 1983 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1984 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1985 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1986 }
1987 if (state->n_wronly == 0) {
88069f77
TM		 1988 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1989 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1990 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1991 }
e7616923 1992 }
4cecb76f 1993 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1994
1995 if (!call_close) {
963d8fe5
TM		 1996 /* Note: exit _without_ calling nfs4_close_done */
1997 task->tk_action = NULL;
9512135d
TM		 1998 return;
1999 }
88069f77 2000
f7e8917a 2001 if (calldata->arg.fmode == 0) {
88069f77 2002 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 2003 if (calldata->roc &&
2004 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2005 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2006 task, NULL);
2007 return;
2008 }
2009 }
88069f77 2010
516a6af6 2011 nfs_fattr_init(calldata->res.fattr);
26e976a8 2012 calldata->timestamp = jiffies;
035168ab 2013 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 2014 &calldata->arg.seq_args, &calldata->res.seq_res,
2015 1, task))
2016 return;
5138fde0 2017 rpc_call_start(task);
1da177e4
LT		 2018}
2019
963d8fe5 2020static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2021 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2022 .rpc_call_done = nfs4_close_done,
2023 .rpc_release = nfs4_free_closedata,
2024};
2025
1da177e4
LT		 2026/*
2027 * It is possible for data to be read/written from a mem-mapped file
2028 * after the sys_close call (which hits the vfs layer as a flush).
2029 * This means that we can't safely call nfsv4 close on a file until
2030 * the inode is cleared. This in turn means that we are not good
2031 * NFSv4 citizens - we do not indicate to the server to update the file's
2032 * share state even when we are done with one of the three share
2033 * stateid's in the inode.
2034 *
2035 * NOTE: Caller must be holding the sp->so_owner semaphore!
2036 */
643168c2 2037int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2038{
4a35bd41 2039 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2040 struct nfs4_closedata *calldata;
b39e625b
TM		 2041 struct nfs4_state_owner *sp = state->owner;
2042 struct rpc_task *task;
5138fde0
TM		 2043 struct rpc_message msg = {
2044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2045 .rpc_cred = state->owner->so_cred,
2046 };
c970aa85
TM		 2047 struct rpc_task_setup task_setup_data = {
2048 .rpc_client = server->client,
5138fde0 2049 .rpc_message = &msg,
c970aa85 2050 .callback_ops = &nfs4_close_ops,
101070ca 2051 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2052 .flags = RPC_TASK_ASYNC,
2053 };
9512135d 2054 int status = -ENOMEM;
1da177e4 2055
8535b2be 2056 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2057 if (calldata == NULL)
9512135d 2058 goto out;
4a35bd41 2059 calldata->inode = state->inode;
1da177e4 2060 calldata->state = state;
4a35bd41 2061 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2062 calldata->arg.stateid = &state->open_stateid;
1da177e4 2063 /* Serialization for the sequence id */
8535b2be 2064 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2065 if (calldata->arg.seqid == NULL)
2066 goto out_free_calldata;
dc0b027d 2067 calldata->arg.fmode = 0;
a65318bf 2068 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2069 calldata->res.fattr = &calldata->fattr;
c1d51931 2070 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2071 calldata->res.server = server;
f7e8917a 2072 calldata->roc = roc;
643168c2 2073 nfs_sb_active(calldata->inode->i_sb);
9512135d 2074
1174dd1f
TM		 2075 msg.rpc_argp = &calldata->arg;
2076 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2077 task_setup_data.callback_data = calldata;
2078 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2079 if (IS_ERR(task))
2080 return PTR_ERR(task);
a49c3c77
TM		 2081 status = 0;
2082 if (wait)
2083 status = rpc_wait_for_completion_task(task);
b39e625b 2084 rpc_put_task(task);
a49c3c77 2085 return status;
9512135d
TM		 2086out_free_calldata:
2087 kfree(calldata);
2088out:
f7e8917a
FI		 2089 if (roc)
2090 pnfs_roc_release(state->inode);
b39e625b
TM		 2091 nfs4_put_open_state(state);
2092 nfs4_put_state_owner(sp);
9512135d 2093 return status;
1da177e4
LT		 2094}
2095
2b484297 2096static struct inode *
cd9a1c0e 2097nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2098{
1da177e4 2099 struct nfs4_state *state;
1da177e4 2100
565277f6 2101 /* Protect against concurrent sillydeletes */
3d4ff43d 2102 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2103 if (IS_ERR(state))
2104 return ERR_CAST(state);
cd9a1c0e 2105 ctx->state = state;
f46e0bd3 2106 return igrab(state->inode);
1da177e4
LT		 2107}
2108
1185a552 2109static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2110{
2111 if (ctx->state == NULL)
2112 return;
2113 if (is_sync)
643168c2 2114 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2115 else
643168c2 2116 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2117}
1da177e4
LT		 2118
2119static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2120{
43652ad5
BH		 2121 struct nfs4_server_caps_arg args = {
2122 .fhandle = fhandle,
2123 };
1da177e4
LT		 2124 struct nfs4_server_caps_res res = {};
2125 struct rpc_message msg = {
2126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2127 .rpc_argp = &args,
1da177e4
LT		 2128 .rpc_resp = &res,
2129 };
2130 int status;
2131
7c513058 2132 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2133 if (status == 0) {
2134 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2135 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2136 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2137 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2138 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2139 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2140 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2141 server->caps |= NFS_CAP_ACLS;
2142 if (res.has_links != 0)
2143 server->caps |= NFS_CAP_HARDLINKS;
2144 if (res.has_symlinks != 0)
2145 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2146 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2147 server->caps |= NFS_CAP_FILEID;
2148 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2149 server->caps |= NFS_CAP_MODE;
2150 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2151 server->caps |= NFS_CAP_NLINK;
2152 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2153 server->caps |= NFS_CAP_OWNER;
2154 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2155 server->caps |= NFS_CAP_OWNER_GROUP;
2156 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2157 server->caps |= NFS_CAP_ATIME;
2158 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2159 server->caps |= NFS_CAP_CTIME;
2160 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2161 server->caps |= NFS_CAP_MTIME;
2162
a65318bf
TM		 2163 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2164 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2165 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2166 server->acl_bitmask = res.acl_bitmask;
2167 }
cccef3b9 2168
1da177e4
LT		 2169 return status;
2170}
2171
55a97593 2172int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2173{
2174 struct nfs4_exception exception = { };
2175 int err;
2176 do {
2177 err = nfs4_handle_exception(server,
2178 _nfs4_server_capabilities(server, fhandle),
2179 &exception);
2180 } while (exception.retry);
2181 return err;
2182}
2183
2184static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2185 struct nfs_fsinfo *info)
2186{
1da177e4
LT		 2187 struct nfs4_lookup_root_arg args = {
2188 .bitmask = nfs4_fattr_bitmap,
2189 };
2190 struct nfs4_lookup_res res = {
2191 .server = server,
0e574af1 2192 .fattr = info->fattr,
1da177e4
LT		 2193 .fh = fhandle,
2194 };
2195 struct rpc_message msg = {
2196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2197 .rpc_argp = &args,
2198 .rpc_resp = &res,
2199 };
008f55d0 2200
0e574af1 2201 nfs_fattr_init(info->fattr);
7c513058 2202 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2203}
2204
2205static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2206 struct nfs_fsinfo *info)
2207{
2208 struct nfs4_exception exception = { };
2209 int err;
2210 do {
fb8a5ba8
BS		 2211 err = _nfs4_lookup_root(server, fhandle, info);
2212 switch (err) {
2213 case 0:
2214 case -NFS4ERR_WRONGSEC:
2215 break;
2216 default:
2217 err = nfs4_handle_exception(server, err, &exception);
2218 }
1da177e4
LT		 2219 } while (exception.retry);
2220 return err;
2221}
2222
8f70e95f
BS		 2223static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2224 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2225{
2226 struct rpc_auth *auth;
2227 int ret;
2228
2229 auth = rpcauth_create(flavor, server->client);
2230 if (!auth) {
2231 ret = -EIO;
2232 goto out;
2233 }
2234 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2235out:
2236 return ret;
2237}
2238
801a16dc 2239static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2240 struct nfs_fsinfo *info)
1da177e4 2241{
8f70e95f 2242 int i, len, status = 0;
0fabee24 2243 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2244
801a16dc
BS		 2245 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2246 flav_array[len] = RPC_AUTH_NULL;
2247 len += 1;
8f70e95f
BS		 2248
2249 for (i = 0; i < len; i++) {
2250 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2251 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2252 continue;
2253 break;
8f70e95f 2254 }
fb8a5ba8
BS		 2255 /*
2256 * -EACCESS could mean that the user doesn't have correct permissions
2257 * to access the mount. It could also mean that we tried to mount
2258 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2259 * existing mount programs don't handle -EACCES very well so it should
2260 * be mapped to -EPERM instead.
2261 */
2262 if (status == -EACCES)
2263 status = -EPERM;
801a16dc
BS		 2264 return status;
2265}
2266
2267/*
2268 * get the file handle for the "/" directory on the server
2269 */
2270static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2271 struct nfs_fsinfo *info)
2272{
fca78d6d 2273 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2274 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2275 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2276 /*
2277 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2278 * by nfs4_map_errors() as this function exits.
2279 */
fca78d6d 2280 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2281 if (status == 0)
2282 status = nfs4_server_capabilities(server, fhandle);
2283 if (status == 0)
2284 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2285 return nfs4_map_errors(status);
1da177e4
LT		 2286}
2287
533eb461 2288static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
6b97fd3d
MN		 2289/*
2290 * Get locations and (maybe) other attributes of a referral.
2291 * Note that we'll actually follow the referral later when
2292 * we detect fsid mismatch in inode revalidation
2293 */
533eb461
AA		 2294static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2295 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2296{
2297 int status = -ENOMEM;
2298 struct page *page = NULL;
2299 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2300
2301 page = alloc_page(GFP_KERNEL);
2302 if (page == NULL)
2303 goto out;
2304 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2305 if (locations == NULL)
2306 goto out;
2307
c228fd3a 2308 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2309 if (status != 0)
2310 goto out;
2311 /* Make sure server returned a different fsid for the referral */
2312 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2313 dprintk("%s: server did not return a different fsid for"
2314 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2315 status = -EIO;
2316 goto out;
2317 }
533eb461
AA		 2318 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2319 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2320
533eb461 2321 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2322 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2323 memset(fhandle, 0, sizeof(struct nfs_fh));
2324out:
2325 if (page)
2326 __free_page(page);
5d7ca35a 2327 kfree(locations);
6b97fd3d
MN		 2328 return status;
2329}
2330
1da177e4
LT		 2331static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2332{
2333 struct nfs4_getattr_arg args = {
2334 .fh = fhandle,
2335 .bitmask = server->attr_bitmask,
2336 };
2337 struct nfs4_getattr_res res = {
2338 .fattr = fattr,
2339 .server = server,
2340 };
2341 struct rpc_message msg = {
2342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2343 .rpc_argp = &args,
2344 .rpc_resp = &res,
2345 };
2346
0e574af1 2347 nfs_fattr_init(fattr);
7c513058 2348 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2349}
2350
2351static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2352{
2353 struct nfs4_exception exception = { };
2354 int err;
2355 do {
2356 err = nfs4_handle_exception(server,
2357 _nfs4_proc_getattr(server, fhandle, fattr),
2358 &exception);
2359 } while (exception.retry);
2360 return err;
2361}
2362
2363/*
2364 * The file is not closed if it is opened due to the a request to change
2365 * the size of the file. The open call will not be needed once the
2366 * VFS layer lookup-intents are implemented.
2367 *
2368 * Close is called when the inode is destroyed.
2369 * If we haven't opened the file for O_WRONLY, we
2370 * need to in the size_change case to obtain a stateid.
2371 *
2372 * Got race?
2373 * Because OPEN is always done by name in nfsv4, it is
2374 * possible that we opened a different file by the same
2375 * name. We can recognize this race condition, but we
2376 * can't do anything about it besides returning an error.
2377 *
2378 * This will be fixed with VFS changes (lookup-intent).
2379 */
2380static int
2381nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2382 struct iattr *sattr)
2383{
08e9eac4 2384 struct inode *inode = dentry->d_inode;
659bfcd6 2385 struct rpc_cred *cred = NULL;
d530838b 2386 struct nfs4_state *state = NULL;
1da177e4
LT		 2387 int status;
2388
8a1636c4
BH		 2389 if (pnfs_ld_layoutret_on_setattr(inode))
2390 pnfs_return_layout(inode);
2391
0e574af1 2392 nfs_fattr_init(fattr);
1da177e4 2393
d530838b 2394 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2395 if (sattr->ia_valid & ATTR_FILE) {
2396 struct nfs_open_context *ctx;
2397
2398 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2399 if (ctx) {
2400 cred = ctx->cred;
2401 state = ctx->state;
2402 }
659bfcd6 2403 }
08e9eac4 2404
659bfcd6 2405 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2406 if (status == 0)
2407 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2408 return status;
2409}
2410
7c513058
BS		 2411static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2412 const struct nfs_fh *dirfh, const struct qstr *name,
2413 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2414{
2415 int status;
2416 struct nfs4_lookup_arg args = {
2417 .bitmask = server->attr_bitmask,
2418 .dir_fh = dirfh,
2419 .name = name,
2420 };
2421 struct nfs4_lookup_res res = {
2422 .server = server,
2423 .fattr = fattr,
2424 .fh = fhandle,
2425 };
2426 struct rpc_message msg = {
2427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2428 .rpc_argp = &args,
2429 .rpc_resp = &res,
2430 };
2431
2432 nfs_fattr_init(fattr);
2433
2434 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2435 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2436 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2437 return status;
2438}
2439
2440static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2441 struct qstr *name, struct nfs_fh *fhandle,
2442 struct nfs_fattr *fattr)
2443{
2444 struct nfs4_exception exception = { };
2445 int err;
2446 do {
7c513058 2447 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2448 /* FIXME: !!!! */
2449 if (err == -NFS4ERR_MOVED) {
2450 err = -EREMOTE;
2451 break;
2452 }
2453 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2454 } while (exception.retry);
2455 return err;
2456}
2457
7c513058
BS		 2458static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2459 const struct qstr *name, struct nfs_fh *fhandle,
2460 struct nfs_fattr *fattr)
1da177e4 2461{
4e56e082 2462 int status;
1da177e4
LT		 2463
2464 dprintk("NFS call lookup %s\n", name->name);
7c513058 2465 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2466 if (status == -NFS4ERR_MOVED)
2467 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2468 dprintk("NFS reply lookup: %d\n", status);
2469 return status;
2470}
2471
7ebb9315
BS		 2472void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2473{
2474 memset(fh, 0, sizeof(struct nfs_fh));
2475 fattr->fsid.major = 1;
2476 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2477 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2478 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2479 fattr->nlink = 2;
2480}
2481
7c513058
BS		 2482static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2483 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2484{
2485 struct nfs4_exception exception = { };
2486 int err;
2487 do {
2488 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2489 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4 2490 &exception);
7ebb9315
BS		 2491 if (err == -EPERM)
2492 nfs_fixup_secinfo_attributes(fattr, fhandle);
1da177e4
LT		 2493 } while (exception.retry);
2494 return err;
2495}
2496
2497static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2498{
76b32999 2499 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2500 struct nfs4_accessargs args = {
2501 .fh = NFS_FH(inode),
76b32999
TM		 2502 .bitmask = server->attr_bitmask,
2503 };
2504 struct nfs4_accessres res = {
2505 .server = server,
1da177e4 2506 };
1da177e4
LT		 2507 struct rpc_message msg = {
2508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2509 .rpc_argp = &args,
2510 .rpc_resp = &res,
2511 .rpc_cred = entry->cred,
2512 };
2513 int mode = entry->mask;
2514 int status;
2515
2516 /*
2517 * Determine which access bits we want to ask for...
2518 */
2519 if (mode & MAY_READ)
2520 args.access |= NFS4_ACCESS_READ;
2521 if (S_ISDIR(inode->i_mode)) {
2522 if (mode & MAY_WRITE)
2523 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2524 if (mode & MAY_EXEC)
2525 args.access |= NFS4_ACCESS_LOOKUP;
2526 } else {
2527 if (mode & MAY_WRITE)
2528 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2529 if (mode & MAY_EXEC)
2530 args.access |= NFS4_ACCESS_EXECUTE;
2531 }
c407d41a
TM		 2532
2533 res.fattr = nfs_alloc_fattr();
2534 if (res.fattr == NULL)
2535 return -ENOMEM;
2536
7c513058 2537 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2538 if (!status) {
2539 entry->mask = 0;
2540 if (res.access & NFS4_ACCESS_READ)
2541 entry->mask |= MAY_READ;
2542 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2543 entry->mask |= MAY_WRITE;
2544 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2545 entry->mask |= MAY_EXEC;
c407d41a 2546 nfs_refresh_inode(inode, res.fattr);
1da177e4 2547 }
c407d41a 2548 nfs_free_fattr(res.fattr);
1da177e4
LT		 2549 return status;
2550}
2551
2552static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2553{
2554 struct nfs4_exception exception = { };
2555 int err;
2556 do {
2557 err = nfs4_handle_exception(NFS_SERVER(inode),
2558 _nfs4_proc_access(inode, entry),
2559 &exception);
2560 } while (exception.retry);
2561 return err;
2562}
2563
2564/*
2565 * TODO: For the time being, we don't try to get any attributes
2566 * along with any of the zero-copy operations READ, READDIR,
2567 * READLINK, WRITE.
2568 *
2569 * In the case of the first three, we want to put the GETATTR
2570 * after the read-type operation -- this is because it is hard
2571 * to predict the length of a GETATTR response in v4, and thus
2572 * align the READ data correctly. This means that the GETATTR
2573 * may end up partially falling into the page cache, and we should
2574 * shift it into the 'tail' of the xdr_buf before processing.
2575 * To do this efficiently, we need to know the total length
2576 * of data received, which doesn't seem to be available outside
2577 * of the RPC layer.
2578 *
2579 * In the case of WRITE, we also want to put the GETATTR after
2580 * the operation -- in this case because we want to make sure
2581 * we get the post-operation mtime and size. This means that
2582 * we can't use xdr_encode_pages() as written: we need a variant
2583 * of it which would leave room in the 'tail' iovec.
2584 *
2585 * Both of these changes to the XDR layer would in fact be quite
2586 * minor, but I decided to leave them for a subsequent patch.
2587 */
2588static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2589 unsigned int pgbase, unsigned int pglen)
2590{
2591 struct nfs4_readlink args = {
2592 .fh = NFS_FH(inode),
2593 .pgbase = pgbase,
2594 .pglen = pglen,
2595 .pages = &page,
2596 };
f50c7000 2597 struct nfs4_readlink_res res;
1da177e4
LT		 2598 struct rpc_message msg = {
2599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2600 .rpc_argp = &args,
f50c7000 2601 .rpc_resp = &res,
1da177e4
LT		 2602 };
2603
7c513058 2604 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2605}
2606
2607static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2608 unsigned int pgbase, unsigned int pglen)
2609{
2610 struct nfs4_exception exception = { };
2611 int err;
2612 do {
2613 err = nfs4_handle_exception(NFS_SERVER(inode),
2614 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2615 &exception);
2616 } while (exception.retry);
2617 return err;
2618}
2619
1da177e4
LT		 2620/*
2621 * Got race?
2622 * We will need to arrange for the VFS layer to provide an atomic open.
2623 * Until then, this create/open method is prone to inefficiency and race
2624 * conditions due to the lookup, create, and open VFS calls from sys_open()
2625 * placed on the wire.
2626 *
2627 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2628 * The file will be opened again in the subsequent VFS open call
2629 * (nfs4_proc_file_open).
2630 *
2631 * The open for read will just hang around to be used by any process that
2632 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2633 */
2634
2635static int
2636nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2637 int flags, struct nfs_open_context *ctx)
1da177e4 2638{
82a2c1b7 2639 struct dentry *de = dentry;
1da177e4 2640 struct nfs4_state *state;
c0204fd2
TM		 2641 struct rpc_cred *cred = NULL;
2642 fmode_t fmode = 0;
1da177e4
LT		 2643 int status = 0;
2644
c0204fd2
TM		 2645 if (ctx != NULL) {
2646 cred = ctx->cred;
3d4ff43d 2647 de = ctx->dentry;
c0204fd2 2648 fmode = ctx->mode;
1da177e4 2649 }
a8a5da99 2650 sattr->ia_mode &= ~current_umask();
82a2c1b7 2651 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
d4d9cdcb 2652 d_drop(dentry);
1da177e4
LT		 2653 if (IS_ERR(state)) {
2654 status = PTR_ERR(state);
c0204fd2 2655 goto out;
1da177e4 2656 }
d4d9cdcb 2657 d_add(dentry, igrab(state->inode));
d75340cc 2658 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2659 if (ctx != NULL)
2660 ctx->state = state;
02a913a7 2661 else
643168c2 2662 nfs4_close_sync(state, fmode);
1da177e4
LT		 2663out:
2664 return status;
2665}
2666
2667static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2668{
16e42959 2669 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2670 struct nfs_removeargs args = {
1da177e4 2671 .fh = NFS_FH(dir),
4fdc17b2
TM		 2672 .name.len = name->len,
2673 .name.name = name->name,
16e42959
TM		 2674 .bitmask = server->attr_bitmask,
2675 };
4fdc17b2 2676 struct nfs_removeres res = {
16e42959 2677 .server = server,
1da177e4 2678 };
1da177e4 2679 struct rpc_message msg = {
4fdc17b2
TM		 2680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2681 .rpc_argp = &args,
2682 .rpc_resp = &res,
1da177e4 2683 };
d346890b
TM		 2684 int status = -ENOMEM;
2685
2686 res.dir_attr = nfs_alloc_fattr();
2687 if (res.dir_attr == NULL)
2688 goto out;
1da177e4 2689
7c513058 2690 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2691 if (status == 0) {
2692 update_changeattr(dir, &res.cinfo);
d346890b 2693 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2694 }
d346890b
TM		 2695 nfs_free_fattr(res.dir_attr);
2696out:
1da177e4
LT		 2697 return status;
2698}
2699
2700static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2701{
2702 struct nfs4_exception exception = { };
2703 int err;
2704 do {
2705 err = nfs4_handle_exception(NFS_SERVER(dir),
2706 _nfs4_proc_remove(dir, name),
2707 &exception);
2708 } while (exception.retry);
2709 return err;
2710}
2711
e4eff1a6 2712static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2713{
e4eff1a6
TM		 2714 struct nfs_server *server = NFS_SERVER(dir);
2715 struct nfs_removeargs *args = msg->rpc_argp;
2716 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2717
a65318bf 2718 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2719 res->server = server;
dfb4f309 2720 res->seq_res.sr_slot = NULL;
1da177e4 2721 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2722}
2723
e4eff1a6 2724static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2725{
e4eff1a6
TM		 2726 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2727
14516c3a
TM		 2728 if (!nfs4_sequence_done(task, &res->seq_res))
2729 return 0;
9e33bed5 2730 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2731 return 0;
2732 update_changeattr(dir, &res->cinfo);
d346890b 2733 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2734 return 1;
1da177e4
LT		 2735}
2736
d3d4152a
JL		 2737static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2738{
2739 struct nfs_server *server = NFS_SERVER(dir);
2740 struct nfs_renameargs *arg = msg->rpc_argp;
2741 struct nfs_renameres *res = msg->rpc_resp;
2742
2743 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2744 arg->bitmask = server->attr_bitmask;
2745 res->server = server;
2746}
2747
2748static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2749 struct inode *new_dir)
2750{
2751 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2752
2753 if (!nfs4_sequence_done(task, &res->seq_res))
2754 return 0;
2755 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2756 return 0;
2757
2758 update_changeattr(old_dir, &res->old_cinfo);
2759 nfs_post_op_update_inode(old_dir, res->old_fattr);
2760 update_changeattr(new_dir, &res->new_cinfo);
2761 nfs_post_op_update_inode(new_dir, res->new_fattr);
2762 return 1;
2763}
2764
1da177e4
LT		 2765static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2766 struct inode *new_dir, struct qstr *new_name)
2767{
6caf2c82 2768 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2769 struct nfs_renameargs arg = {
1da177e4
LT		 2770 .old_dir = NFS_FH(old_dir),
2771 .new_dir = NFS_FH(new_dir),
2772 .old_name = old_name,
2773 .new_name = new_name,
6caf2c82
TM		 2774 .bitmask = server->attr_bitmask,
2775 };
e8582a8b 2776 struct nfs_renameres res = {
6caf2c82 2777 .server = server,
1da177e4 2778 };
1da177e4
LT		 2779 struct rpc_message msg = {
2780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2781 .rpc_argp = &arg,
2782 .rpc_resp = &res,
2783 };
011fff72 2784 int status = -ENOMEM;
1da177e4 2785
011fff72
TM		 2786 res.old_fattr = nfs_alloc_fattr();
2787 res.new_fattr = nfs_alloc_fattr();
2788 if (res.old_fattr == NULL || res.new_fattr == NULL)
2789 goto out;
1da177e4 2790
7c513058 2791 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2792 if (!status) {
2793 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2794 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2795 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2796 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2797 }
011fff72
TM		 2798out:
2799 nfs_free_fattr(res.new_fattr);
2800 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2801 return status;
2802}
2803
2804static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2805 struct inode *new_dir, struct qstr *new_name)
2806{
2807 struct nfs4_exception exception = { };
2808 int err;
2809 do {
2810 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2811 _nfs4_proc_rename(old_dir, old_name,
2812 new_dir, new_name),
2813 &exception);
2814 } while (exception.retry);
2815 return err;
2816}
2817
2818static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2819{
91ba2eee 2820 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2821 struct nfs4_link_arg arg = {
2822 .fh = NFS_FH(inode),
2823 .dir_fh = NFS_FH(dir),
2824 .name = name,
91ba2eee
TM		 2825 .bitmask = server->attr_bitmask,
2826 };
91ba2eee
TM		 2827 struct nfs4_link_res res = {
2828 .server = server,
1da177e4 2829 };
1da177e4
LT		 2830 struct rpc_message msg = {
2831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2832 .rpc_argp = &arg,
91ba2eee 2833 .rpc_resp = &res,
1da177e4 2834 };
136f2627
TM		 2835 int status = -ENOMEM;
2836
2837 res.fattr = nfs_alloc_fattr();
2838 res.dir_attr = nfs_alloc_fattr();
2839 if (res.fattr == NULL || res.dir_attr == NULL)
2840 goto out;
1da177e4 2841
7c513058 2842 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2843 if (!status) {
2844 update_changeattr(dir, &res.cinfo);
2845 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2846 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2847 }
136f2627
TM		 2848out:
2849 nfs_free_fattr(res.dir_attr);
2850 nfs_free_fattr(res.fattr);
1da177e4
LT		 2851 return status;
2852}
2853
2854static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2855{
2856 struct nfs4_exception exception = { };
2857 int err;
2858 do {
2859 err = nfs4_handle_exception(NFS_SERVER(inode),
2860 _nfs4_proc_link(inode, dir, name),
2861 &exception);
2862 } while (exception.retry);
2863 return err;
2864}
2865
57dc9a57
TM		 2866struct nfs4_createdata {
2867 struct rpc_message msg;
2868 struct nfs4_create_arg arg;
2869 struct nfs4_create_res res;
2870 struct nfs_fh fh;
2871 struct nfs_fattr fattr;
2872 struct nfs_fattr dir_fattr;
2873};
2874
2875static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2876 struct qstr *name, struct iattr *sattr, u32 ftype)
2877{
2878 struct nfs4_createdata *data;
2879
2880 data = kzalloc(sizeof(*data), GFP_KERNEL);
2881 if (data != NULL) {
2882 struct nfs_server *server = NFS_SERVER(dir);
2883
2884 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2885 data->msg.rpc_argp = &data->arg;
2886 data->msg.rpc_resp = &data->res;
2887 data->arg.dir_fh = NFS_FH(dir);
2888 data->arg.server = server;
2889 data->arg.name = name;
2890 data->arg.attrs = sattr;
2891 data->arg.ftype = ftype;
2892 data->arg.bitmask = server->attr_bitmask;
2893 data->res.server = server;
2894 data->res.fh = &data->fh;
2895 data->res.fattr = &data->fattr;
2896 data->res.dir_fattr = &data->dir_fattr;
2897 nfs_fattr_init(data->res.fattr);
2898 nfs_fattr_init(data->res.dir_fattr);
2899 }
2900 return data;
2901}
2902
2903static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2904{
7c513058 2905 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2906 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2907 if (status == 0) {
2908 update_changeattr(dir, &data->res.dir_cinfo);
2909 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2910 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2911 }
2912 return status;
2913}
2914
2915static void nfs4_free_createdata(struct nfs4_createdata *data)
2916{
2917 kfree(data);
2918}
2919
4f390c15 2920static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2921 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2922{
57dc9a57
TM		 2923 struct nfs4_createdata *data;
2924 int status = -ENAMETOOLONG;
1da177e4 2925
94a6d753 2926 if (len > NFS4_MAXPATHLEN)
57dc9a57 2927 goto out;
4f390c15 2928
57dc9a57
TM		 2929 status = -ENOMEM;
2930 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2931 if (data == NULL)
2932 goto out;
2933
2934 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2935 data->arg.u.symlink.pages = &page;
2936 data->arg.u.symlink.len = len;
1da177e4 2937
57dc9a57
TM		 2938 status = nfs4_do_create(dir, dentry, data);
2939
2940 nfs4_free_createdata(data);
2941out:
1da177e4
LT		 2942 return status;
2943}
2944
4f390c15 2945static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2946 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2947{
2948 struct nfs4_exception exception = { };
2949 int err;
2950 do {
2951 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2952 _nfs4_proc_symlink(dir, dentry, page,
2953 len, sattr),
1da177e4
LT		 2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2960 struct iattr *sattr)
2961{
57dc9a57
TM		 2962 struct nfs4_createdata *data;
2963 int status = -ENOMEM;
1da177e4 2964
57dc9a57
TM		 2965 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2966 if (data == NULL)
2967 goto out;
2968
2969 status = nfs4_do_create(dir, dentry, data);
2970
2971 nfs4_free_createdata(data);
2972out:
1da177e4
LT		 2973 return status;
2974}
2975
2976static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2977 struct iattr *sattr)
2978{
2979 struct nfs4_exception exception = { };
2980 int err;
a8a5da99
AK		 2981
2982 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2983 do {
2984 err = nfs4_handle_exception(NFS_SERVER(dir),
2985 _nfs4_proc_mkdir(dir, dentry, sattr),
2986 &exception);
2987 } while (exception.retry);
2988 return err;
2989}
2990
2991static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2992 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2993{
2994 struct inode *dir = dentry->d_inode;
2995 struct nfs4_readdir_arg args = {
2996 .fh = NFS_FH(dir),
56e4ebf8 2997 .pages = pages,
1da177e4
LT		 2998 .pgbase = 0,
2999 .count = count,
96d25e53 3000 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3001 .plus = plus,
1da177e4
LT		 3002 };
3003 struct nfs4_readdir_res res;
3004 struct rpc_message msg = {
3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3006 .rpc_argp = &args,
3007 .rpc_resp = &res,
3008 .rpc_cred = cred,
3009 };
3010 int status;
3011
3110ff80 3012 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3013 dentry->d_parent->d_name.name,
3014 dentry->d_name.name,
3015 (unsigned long long)cookie);
1da177e4
LT		 3016 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3017 res.pgbase = args.pgbase;
7c513058 3018 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3019 if (status >= 0) {
1da177e4 3020 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3021 status += args.pgbase;
3022 }
c4812998
TM		 3023
3024 nfs_invalidate_atime(dir);
3025
3110ff80 3026 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3027 return status;
3028}
3029
3030static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3031 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3032{
3033 struct nfs4_exception exception = { };
3034 int err;
3035 do {
3036 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3037 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3038 pages, count, plus),
1da177e4
LT		 3039 &exception);
3040 } while (exception.retry);
3041 return err;
3042}
3043
3044static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3045 struct iattr *sattr, dev_t rdev)
3046{
57dc9a57
TM		 3047 struct nfs4_createdata *data;
3048 int mode = sattr->ia_mode;
3049 int status = -ENOMEM;
1da177e4
LT		 3050
3051 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3052 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3053
3054 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3055 if (data == NULL)
3056 goto out;
3057
1da177e4 3058 if (S_ISFIFO(mode))
57dc9a57 3059 data->arg.ftype = NF4FIFO;
1da177e4 3060 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3061 data->arg.ftype = NF4BLK;
3062 data->arg.u.device.specdata1 = MAJOR(rdev);
3063 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3064 }
3065 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3066 data->arg.ftype = NF4CHR;
3067 data->arg.u.device.specdata1 = MAJOR(rdev);
3068 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3069 }
1da177e4 3070
57dc9a57
TM		 3071 status = nfs4_do_create(dir, dentry, data);
3072
3073 nfs4_free_createdata(data);
3074out:
1da177e4
LT		 3075 return status;
3076}
3077
3078static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3079 struct iattr *sattr, dev_t rdev)
3080{
3081 struct nfs4_exception exception = { };
3082 int err;
a8a5da99
AK		 3083
3084 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3085 do {
3086 err = nfs4_handle_exception(NFS_SERVER(dir),
3087 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3088 &exception);
3089 } while (exception.retry);
3090 return err;
3091}
3092
3093static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3094 struct nfs_fsstat *fsstat)
3095{
3096 struct nfs4_statfs_arg args = {
3097 .fh = fhandle,
3098 .bitmask = server->attr_bitmask,
3099 };
24ad148a
BH		 3100 struct nfs4_statfs_res res = {
3101 .fsstat = fsstat,
3102 };
1da177e4
LT		 3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3105 .rpc_argp = &args,
24ad148a 3106 .rpc_resp = &res,
1da177e4
LT		 3107 };
3108
0e574af1 3109 nfs_fattr_init(fsstat->fattr);
7c513058 3110 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3111}
3112
3113static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3114{
3115 struct nfs4_exception exception = { };
3116 int err;
3117 do {
3118 err = nfs4_handle_exception(server,
3119 _nfs4_proc_statfs(server, fhandle, fsstat),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3126 struct nfs_fsinfo *fsinfo)
3127{
3128 struct nfs4_fsinfo_arg args = {
3129 .fh = fhandle,
3130 .bitmask = server->attr_bitmask,
3131 };
3dda5e43
BH		 3132 struct nfs4_fsinfo_res res = {
3133 .fsinfo = fsinfo,
3134 };
1da177e4
LT		 3135 struct rpc_message msg = {
3136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3137 .rpc_argp = &args,
3dda5e43 3138 .rpc_resp = &res,
1da177e4
LT		 3139 };
3140
7c513058 3141 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3142}
3143
3144static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3145{
3146 struct nfs4_exception exception = { };
3147 int err;
3148
3149 do {
3150 err = nfs4_handle_exception(server,
3151 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3152 &exception);
3153 } while (exception.retry);
3154 return err;
3155}
3156
3157static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3158{
0e574af1 3159 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3160 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3161}
3162
3163static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3164 struct nfs_pathconf *pathconf)
3165{
3166 struct nfs4_pathconf_arg args = {
3167 .fh = fhandle,
3168 .bitmask = server->attr_bitmask,
3169 };
d45b2989
BH		 3170 struct nfs4_pathconf_res res = {
3171 .pathconf = pathconf,
3172 };
1da177e4
LT		 3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3175 .rpc_argp = &args,
d45b2989 3176 .rpc_resp = &res,
1da177e4
LT		 3177 };
3178
3179 /* None of the pathconf attributes are mandatory to implement */
3180 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3181 memset(pathconf, 0, sizeof(*pathconf));
3182 return 0;
3183 }
3184
0e574af1 3185 nfs_fattr_init(pathconf->fattr);
7c513058 3186 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3187}
3188
3189static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3190 struct nfs_pathconf *pathconf)
3191{
3192 struct nfs4_exception exception = { };
3193 int err;
3194
3195 do {
3196 err = nfs4_handle_exception(server,
3197 _nfs4_proc_pathconf(server, fhandle, pathconf),
3198 &exception);
3199 } while (exception.retry);
3200 return err;
3201}
3202
d20581aa
BH		 3203void __nfs4_read_done_cb(struct nfs_read_data *data)
3204{
3205 nfs_invalidate_atime(data->inode);
3206}
3207
cbdabc7f 3208static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3209{
ec06c096 3210 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3211
9e33bed5 3212 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3213 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3214 return -EAGAIN;
1da177e4 3215 }
8850df99 3216
d20581aa 3217 __nfs4_read_done_cb(data);
1da177e4 3218 if (task->tk_status > 0)
ec06c096
TM		 3219 renew_lease(server, data->timestamp);
3220 return 0;
1da177e4
LT		 3221}
3222
cbdabc7f
AA		 3223static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3224{
3225
3226 dprintk("--> %s\n", __func__);
3227
3228 if (!nfs4_sequence_done(task, &data->res.seq_res))
3229 return -EAGAIN;
3230
d20581aa
BH		 3231 return data->read_done_cb ? data->read_done_cb(task, data) :
3232 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3233}
3234
bdc7f021 3235static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3236{
1da177e4 3237 data->timestamp = jiffies;
cbdabc7f 3238 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3239 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3240}
3241
cbdabc7f
AA		 3242/* Reset the the nfs_read_data to send the read to the MDS. */
3243void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3244{
3245 dprintk("%s Reset task for i/o through\n", __func__);
3246 put_lseg(data->lseg);
3247 data->lseg = NULL;
3248 /* offsets will differ in the dense stripe case */
3249 data->args.offset = data->mds_offset;
3250 data->ds_clp = NULL;
3251 data->args.fh = NFS_FH(data->inode);
3252 data->read_done_cb = nfs4_read_done_cb;
3253 task->tk_ops = data->mds_ops;
3254 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3255}
3256EXPORT_SYMBOL_GPL(nfs4_reset_read);
3257
b029bc9b 3258static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3259{
1da177e4
LT		 3260 struct inode *inode = data->inode;
3261
9e33bed5 3262 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3263 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3264 return -EAGAIN;
1da177e4 3265 }
4f9838c7 3266 if (task->tk_status >= 0) {
1da177e4 3267 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3268 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3269 }
788e7a89 3270 return 0;
1da177e4
LT		 3271}
3272
b029bc9b
FI		 3273static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3274{
3275 if (!nfs4_sequence_done(task, &data->res.seq_res))
3276 return -EAGAIN;
d20581aa
BH		 3277 return data->write_done_cb ? data->write_done_cb(task, data) :
3278 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3279}
3280
a69aef14
FI		 3281/* Reset the the nfs_write_data to send the write to the MDS. */
3282void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3283{
3284 dprintk("%s Reset task for i/o through\n", __func__);
3285 put_lseg(data->lseg);
3286 data->lseg = NULL;
3287 data->ds_clp = NULL;
3288 data->write_done_cb = nfs4_write_done_cb;
3289 data->args.fh = NFS_FH(data->inode);
3290 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3291 data->args.offset = data->mds_offset;
3292 data->res.fattr = &data->fattr;
3293 task->tk_ops = data->mds_ops;
3294 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3295}
3296EXPORT_SYMBOL_GPL(nfs4_reset_write);
3297
bdc7f021 3298static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3299{
bdc7f021
TM		 3300 struct nfs_server *server = NFS_SERVER(data->inode);
3301
7ffd1064
FI		 3302 if (data->lseg) {
3303 data->args.bitmask = NULL;
3304 data->res.fattr = NULL;
3305 } else
3306 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3307 if (!data->write_done_cb)
3308 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3309 data->res.server = server;
1da177e4
LT		 3310 data->timestamp = jiffies;
3311
bdc7f021 3312 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3313}
3314
5f452431 3315static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3316{
1da177e4 3317 struct inode *inode = data->inode;
14516c3a 3318
9e33bed5 3319 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3320 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3321 return -EAGAIN;
1da177e4 3322 }
9e08a3c5 3323 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3324 return 0;
1da177e4
LT		 3325}
3326
5f452431
FI		 3327static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3328{
3329 if (!nfs4_sequence_done(task, &data->res.seq_res))
3330 return -EAGAIN;
3331 return data->write_done_cb(task, data);
3332}
3333
bdc7f021 3334static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3335{
788e7a89 3336 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3337
3338 if (data->lseg) {
3339 data->args.bitmask = NULL;
3340 data->res.fattr = NULL;
3341 } else
3342 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3343 if (!data->write_done_cb)
3344 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3345 data->res.server = server;
bdc7f021 3346 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3347}
3348
9bc4e3ca
CL		 3349struct nfs4_renewdata {
3350 struct nfs_client *client;
3351 unsigned long timestamp;
3352};
3353
1da177e4
LT		 3354/*
3355 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3356 * standalone procedure for queueing an asynchronous RENEW.
3357 */
9bc4e3ca 3358static void nfs4_renew_release(void *calldata)
dc96aef9 3359{
9bc4e3ca
CL		 3360 struct nfs4_renewdata *data = calldata;
3361 struct nfs_client *clp = data->client;
dc96aef9 3362
0851de06
AB		 3363 if (atomic_read(&clp->cl_count) > 1)
3364 nfs4_schedule_state_renewal(clp);
3365 nfs_put_client(clp);
9bc4e3ca 3366 kfree(data);
dc96aef9
AB		 3367}
3368
9bc4e3ca 3369static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3370{
9bc4e3ca
CL		 3371 struct nfs4_renewdata *data = calldata;
3372 struct nfs_client *clp = data->client;
3373 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3374
3375 if (task->tk_status < 0) {
95baa25c 3376 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3377 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3378 return;
3379 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3380 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3381 return;
3382 }
3383 nfs4_schedule_path_down_recovery(clp);
1da177e4 3384 }
452e9352 3385 do_renew_lease(clp, timestamp);
1da177e4
LT		 3386}
3387
963d8fe5
TM		 3388static const struct rpc_call_ops nfs4_renew_ops = {
3389 .rpc_call_done = nfs4_renew_done,
dc96aef9 3390 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3391};
3392
2f60ea6b 3393static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3394{
3395 struct rpc_message msg = {
3396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3397 .rpc_argp = clp,
b4454fe1 3398 .rpc_cred = cred,
1da177e4 3399 };
9bc4e3ca 3400 struct nfs4_renewdata *data;
1da177e4 3401
2f60ea6b
TM		 3402 if (renew_flags == 0)
3403 return 0;
0851de06
AB		 3404 if (!atomic_inc_not_zero(&clp->cl_count))
3405 return -EIO;
b569ad34 3406 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3407 if (data == NULL)
3408 return -ENOMEM;
3409 data->client = clp;
3410 data->timestamp = jiffies;
1da177e4 3411 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3412 &nfs4_renew_ops, data);
1da177e4
LT		 3413}
3414
8534d4ec 3415static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3416{
3417 struct rpc_message msg = {
3418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3419 .rpc_argp = clp,
b4454fe1 3420 .rpc_cred = cred,
1da177e4
LT		 3421 };
3422 unsigned long now = jiffies;
3423 int status;
3424
3425 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3426 if (status < 0)
3427 return status;
452e9352 3428 do_renew_lease(clp, now);
1da177e4
LT		 3429 return 0;
3430}
3431
aa1870af
BF		 3432static inline int nfs4_server_supports_acls(struct nfs_server *server)
3433{
3434 return (server->caps & NFS_CAP_ACLS)
3435 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3436 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3437}
3438
3439/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3440 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3441 * the stack.
3442 */
3443#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3444
3445static void buf_to_pages(const void *buf, size_t buflen,
3446 struct page **pages, unsigned int *pgbase)
3447{
3448 const void *p = buf;
3449
3450 *pgbase = offset_in_page(buf);
3451 p -= *pgbase;
3452 while (p < buf + buflen) {
3453 *(pages++) = virt_to_page(p);
3454 p += PAGE_CACHE_SIZE;
3455 }
3456}
3457
e9e3d724
NH		 3458static int buf_to_pages_noslab(const void *buf, size_t buflen,
3459 struct page **pages, unsigned int *pgbase)
3460{
3461 struct page *newpage, **spages;
3462 int rc = 0;
3463 size_t len;
3464 spages = pages;
3465
3466 do {
43b7c3f0 3467 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3468 newpage = alloc_page(GFP_KERNEL);
3469
3470 if (newpage == NULL)
3471 goto unwind;
3472 memcpy(page_address(newpage), buf, len);
3473 buf += len;
3474 buflen -= len;
3475 *pages++ = newpage;
3476 rc++;
3477 } while (buflen != 0);
3478
3479 return rc;
3480
3481unwind:
3482 for(; rc > 0; rc--)
3483 __free_page(spages[rc-1]);
3484 return -ENOMEM;
3485}
3486
e50a1c2e
BF		 3487struct nfs4_cached_acl {
3488 int cached;
3489 size_t len;
3e9d4154 3490 char data[0];
e50a1c2e
BF		 3491};
3492
3493static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3494{
3495 struct nfs_inode *nfsi = NFS_I(inode);
3496
3497 spin_lock(&inode->i_lock);
3498 kfree(nfsi->nfs4_acl);
3499 nfsi->nfs4_acl = acl;
3500 spin_unlock(&inode->i_lock);
3501}
3502
3503static void nfs4_zap_acl_attr(struct inode *inode)
3504{
3505 nfs4_set_cached_acl(inode, NULL);
3506}
3507
3508static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3509{
3510 struct nfs_inode *nfsi = NFS_I(inode);
3511 struct nfs4_cached_acl *acl;
3512 int ret = -ENOENT;
3513
3514 spin_lock(&inode->i_lock);
3515 acl = nfsi->nfs4_acl;
3516 if (acl == NULL)
3517 goto out;
3518 if (buf == NULL) /* user is just asking for length */
3519 goto out_len;
3520 if (acl->cached == 0)
3521 goto out;
3522 ret = -ERANGE; /* see getxattr(2) man page */
3523 if (acl->len > buflen)
3524 goto out;
3525 memcpy(buf, acl->data, acl->len);
3526out_len:
3527 ret = acl->len;
3528out:
3529 spin_unlock(&inode->i_lock);
3530 return ret;
3531}
3532
3533static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3534{
3535 struct nfs4_cached_acl *acl;
3536
3537 if (buf && acl_len <= PAGE_SIZE) {
3538 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3539 if (acl == NULL)
3540 goto out;
3541 acl->cached = 1;
3542 memcpy(acl->data, buf, acl_len);
3543 } else {
3544 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3545 if (acl == NULL)
3546 goto out;
3547 acl->cached = 0;
3548 }
3549 acl->len = acl_len;
3550out:
3551 nfs4_set_cached_acl(inode, acl);
3552}
3553
16b4289c 3554static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3555{
aa1870af
BF		 3556 struct page *pages[NFS4ACL_MAXPAGES];
3557 struct nfs_getaclargs args = {
3558 .fh = NFS_FH(inode),
3559 .acl_pages = pages,
3560 .acl_len = buflen,
3561 };
663c79b3
BH		 3562 struct nfs_getaclres res = {
3563 .acl_len = buflen,
3564 };
e50a1c2e 3565 void *resp_buf;
aa1870af
BF		 3566 struct rpc_message msg = {
3567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3568 .rpc_argp = &args,
663c79b3 3569 .rpc_resp = &res,
aa1870af 3570 };
e50a1c2e 3571 struct page *localpage = NULL;
aa1870af
BF		 3572 int ret;
3573
e50a1c2e
BF		 3574 if (buflen < PAGE_SIZE) {
3575 /* As long as we're doing a round trip to the server anyway,
3576 * let's be prepared for a page of acl data. */
3577 localpage = alloc_page(GFP_KERNEL);
3578 resp_buf = page_address(localpage);
3579 if (localpage == NULL)
3580 return -ENOMEM;
3581 args.acl_pages[0] = localpage;
3582 args.acl_pgbase = 0;
663c79b3 3583 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3584 } else {
3585 resp_buf = buf;
3586 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3587 }
7c513058 3588 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3589 if (ret)
3590 goto out_free;
663c79b3
BH		 3591 if (res.acl_len > args.acl_len)
3592 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3593 else
663c79b3 3594 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3595 if (buf) {
3596 ret = -ERANGE;
663c79b3 3597 if (res.acl_len > buflen)
e50a1c2e
BF		 3598 goto out_free;
3599 if (localpage)
663c79b3 3600 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3601 }
663c79b3 3602 ret = res.acl_len;
e50a1c2e
BF		 3603out_free:
3604 if (localpage)
3605 __free_page(localpage);
aa1870af
BF		 3606 return ret;
3607}
3608
16b4289c
TM		 3609static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3610{
3611 struct nfs4_exception exception = { };
3612 ssize_t ret;
3613 do {
3614 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3615 if (ret >= 0)
3616 break;
3617 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3618 } while (exception.retry);
3619 return ret;
3620}
3621
e50a1c2e
BF		 3622static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3623{
3624 struct nfs_server *server = NFS_SERVER(inode);
3625 int ret;
3626
3627 if (!nfs4_server_supports_acls(server))
3628 return -EOPNOTSUPP;
3629 ret = nfs_revalidate_inode(server, inode);
3630 if (ret < 0)
3631 return ret;
08a22b39
AK		 3632 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3633 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3634 ret = nfs4_read_cached_acl(inode, buf, buflen);
3635 if (ret != -ENOENT)
3636 return ret;
3637 return nfs4_get_acl_uncached(inode, buf, buflen);
3638}
3639
16b4289c 3640static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3641{
3642 struct nfs_server *server = NFS_SERVER(inode);
3643 struct page *pages[NFS4ACL_MAXPAGES];
3644 struct nfs_setaclargs arg = {
3645 .fh = NFS_FH(inode),
3646 .acl_pages = pages,
3647 .acl_len = buflen,
3648 };
73c403a9 3649 struct nfs_setaclres res;
4b580ee3
BF		 3650 struct rpc_message msg = {
3651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3652 .rpc_argp = &arg,
73c403a9 3653 .rpc_resp = &res,
4b580ee3 3654 };
e9e3d724 3655 int ret, i;
4b580ee3
BF		 3656
3657 if (!nfs4_server_supports_acls(server))
3658 return -EOPNOTSUPP;
e9e3d724
NH		 3659 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3660 if (i < 0)
3661 return i;
642ac549 3662 nfs_inode_return_delegation(inode);
7c513058 3663 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3664
3665 /*
3666 * Free each page after tx, so the only ref left is
3667 * held by the network stack
3668 */
3669 for (; i > 0; i--)
3670 put_page(pages[i-1]);
3671
08a22b39
AK		 3672 /*
3673 * Acl update can result in inode attribute update.
3674 * so mark the attribute cache invalid.
3675 */
3676 spin_lock(&inode->i_lock);
3677 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3678 spin_unlock(&inode->i_lock);
f41f7418
TM		 3679 nfs_access_zap_cache(inode);
3680 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3681 return ret;
3682}
3683
16b4289c
TM		 3684static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3685{
3686 struct nfs4_exception exception = { };
3687 int err;
3688 do {
3689 err = nfs4_handle_exception(NFS_SERVER(inode),
3690 __nfs4_proc_set_acl(inode, buf, buflen),
3691 &exception);
3692 } while (exception.retry);
3693 return err;
3694}
3695
1da177e4 3696static int
aa5190d0 3697nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3698{
aa5190d0
TM		 3699 struct nfs_client *clp = server->nfs_client;
3700
3701 if (task->tk_status >= 0)
1da177e4
LT		 3702 return 0;
3703 switch(task->tk_status) {
9e33bed5
TM		 3704 case -NFS4ERR_ADMIN_REVOKED:
3705 case -NFS4ERR_BAD_STATEID:
3706 case -NFS4ERR_OPENMODE:
3707 if (state == NULL)
3708 break;
0400a6b0
TM		 3709 nfs4_schedule_stateid_recovery(server, state);
3710 goto wait_on_recovery;
0ced63d1
TM		 3711 case -NFS4ERR_EXPIRED:
3712 if (state != NULL)
3713 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3714 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3715 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3716 nfs4_schedule_lease_recovery(clp);
3717 goto wait_on_recovery;
4745e315
AA		 3718#if defined(CONFIG_NFS_V4_1)
3719 case -NFS4ERR_BADSESSION:
3720 case -NFS4ERR_BADSLOT:
3721 case -NFS4ERR_BAD_HIGH_SLOT:
3722 case -NFS4ERR_DEADSESSION:
3723 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3724 case -NFS4ERR_SEQ_FALSE_RETRY:
3725 case -NFS4ERR_SEQ_MISORDERED:
3726 dprintk("%s ERROR %d, Reset session\n", __func__,
3727 task->tk_status);
0400a6b0 3728 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3729 task->tk_status = 0;
3730 return -EAGAIN;
3731#endif /* CONFIG_NFS_V4_1 */
1da177e4 3732 case -NFS4ERR_DELAY:
aa5190d0 3733 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3734 case -NFS4ERR_GRACE:
2c643488 3735 case -EKEYEXPIRED:
1da177e4
LT		 3736 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3737 task->tk_status = 0;
3738 return -EAGAIN;
a8a4ae3a 3739 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3740 case -NFS4ERR_OLD_STATEID:
3741 task->tk_status = 0;
3742 return -EAGAIN;
3743 }
3744 task->tk_status = nfs4_map_errors(task->tk_status);
3745 return 0;
0400a6b0 3746wait_on_recovery:
a2c0b9e2 3747 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3748 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3749 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3750 task->tk_status = 0;
3751 return -EAGAIN;
1da177e4
LT		 3752}
3753
bb8b27e5
TM		 3754int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3755 unsigned short port, struct rpc_cred *cred,
3756 struct nfs4_setclientid_res *res)
1da177e4
LT		 3757{
3758 nfs4_verifier sc_verifier;
3759 struct nfs4_setclientid setclientid = {
3760 .sc_verifier = &sc_verifier,
3761 .sc_prog = program,
f4eecd5d 3762 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3763 };
3764 struct rpc_message msg = {
3765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3766 .rpc_argp = &setclientid,
bb8b27e5 3767 .rpc_resp = res,
286d7d6a 3768 .rpc_cred = cred,
1da177e4 3769 };
bc4785cd 3770 __be32 *p;
1da177e4
LT		 3771 int loop = 0;
3772 int status;
3773
bc4785cd 3774 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3775 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3776 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3777
3778 for(;;) {
3779 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3780 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3781 clp->cl_ipaddr,
3782 rpc_peeraddr2str(clp->cl_rpcclient,
3783 RPC_DISPLAY_ADDR),
69dd716c
TM		 3784 rpc_peeraddr2str(clp->cl_rpcclient,
3785 RPC_DISPLAY_PROTO),
78ea323b 3786 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3787 clp->cl_id_uniquifier);
3788 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3789 sizeof(setclientid.sc_netid),
3790 rpc_peeraddr2str(clp->cl_rpcclient,
3791 RPC_DISPLAY_NETID));
1da177e4 3792 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3793 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3794 clp->cl_ipaddr, port >> 8, port & 255);
3795
1bd714f2 3796 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3797 if (status != -NFS4ERR_CLID_INUSE)
3798 break;
fd954ae1
TM		 3799 if (loop != 0) {
3800 ++clp->cl_id_uniquifier;
1da177e4 3801 break;
fd954ae1
TM		 3802 }
3803 ++loop;
3804 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3805 }
3806 return status;
3807}
3808
fd954ae1 3809int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3810 struct nfs4_setclientid_res *arg,
3811 struct rpc_cred *cred)
1da177e4
LT		 3812{
3813 struct nfs_fsinfo fsinfo;
3814 struct rpc_message msg = {
3815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3816 .rpc_argp = arg,
1da177e4 3817 .rpc_resp = &fsinfo,
286d7d6a 3818 .rpc_cred = cred,
1da177e4
LT		 3819 };
3820 unsigned long now;
3821 int status;
3822
3823 now = jiffies;
1bd714f2 3824 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3825 if (status == 0) {
3826 spin_lock(&clp->cl_lock);
3827 clp->cl_lease_time = fsinfo.lease_time * HZ;
3828 clp->cl_last_renewal = now;
3829 spin_unlock(&clp->cl_lock);
3830 }
3831 return status;
3832}
3833
fe650407
TM		 3834struct nfs4_delegreturndata {
3835 struct nfs4_delegreturnargs args;
fa178f29 3836 struct nfs4_delegreturnres res;
fe650407
TM		 3837 struct nfs_fh fh;
3838 nfs4_stateid stateid;
26e976a8 3839 unsigned long timestamp;
fa178f29 3840 struct nfs_fattr fattr;
fe650407
TM		 3841 int rpc_status;
3842};
3843
fe650407
TM		 3844static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3845{
3846 struct nfs4_delegreturndata *data = calldata;
938e1010 3847
14516c3a
TM		 3848 if (!nfs4_sequence_done(task, &data->res.seq_res))
3849 return;
938e1010 3850
79708861
RL		 3851 switch (task->tk_status) {
3852 case -NFS4ERR_STALE_STATEID:
3853 case -NFS4ERR_EXPIRED:
3854 case 0:
fa178f29 3855 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3856 break;
3857 default:
3858 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3859 -EAGAIN) {
3860 nfs_restart_rpc(task, data->res.server->nfs_client);
3861 return;
3862 }
3863 }
3864 data->rpc_status = task->tk_status;
fe650407
TM		 3865}
3866
3867static void nfs4_delegreturn_release(void *calldata)
3868{
fe650407
TM		 3869 kfree(calldata);
3870}
3871
938e1010
AA		 3872#if defined(CONFIG_NFS_V4_1)
3873static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3874{
3875 struct nfs4_delegreturndata *d_data;
3876
3877 d_data = (struct nfs4_delegreturndata *)data;
3878
035168ab 3879 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3880 &d_data->args.seq_args,
3881 &d_data->res.seq_res, 1, task))
3882 return;
3883 rpc_call_start(task);
3884}
3885#endif /* CONFIG_NFS_V4_1 */
3886
c8d149f3 3887static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3888#if defined(CONFIG_NFS_V4_1)
3889 .rpc_call_prepare = nfs4_delegreturn_prepare,
3890#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3891 .rpc_call_done = nfs4_delegreturn_done,
3892 .rpc_release = nfs4_delegreturn_release,
3893};
3894
e6f81075 3895static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3896{
3897 struct nfs4_delegreturndata *data;
fa178f29 3898 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3899 struct rpc_task *task;
5138fde0
TM		 3900 struct rpc_message msg = {
3901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3902 .rpc_cred = cred,
3903 };
c970aa85
TM		 3904 struct rpc_task_setup task_setup_data = {
3905 .rpc_client = server->client,
5138fde0 3906 .rpc_message = &msg,
c970aa85
TM		 3907 .callback_ops = &nfs4_delegreturn_ops,
3908 .flags = RPC_TASK_ASYNC,
3909 };
e6f81075 3910 int status = 0;
fe650407 3911
8535b2be 3912 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3913 if (data == NULL)
3914 return -ENOMEM;
3915 data->args.fhandle = &data->fh;
3916 data->args.stateid = &data->stateid;
fa178f29 3917 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3918 nfs_copy_fh(&data->fh, NFS_FH(inode));
3919 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3920 data->res.fattr = &data->fattr;
3921 data->res.server = server;
5138fde0 3922 nfs_fattr_init(data->res.fattr);
26e976a8 3923 data->timestamp = jiffies;
fe650407
TM		 3924 data->rpc_status = 0;
3925
c970aa85 3926 task_setup_data.callback_data = data;
1174dd1f
TM		 3927 msg.rpc_argp = &data->args;
3928 msg.rpc_resp = &data->res;
c970aa85 3929 task = rpc_run_task(&task_setup_data);
7a1218a2 3930 if (IS_ERR(task))
fe650407 3931 return PTR_ERR(task);
e6f81075
TM		 3932 if (!issync)
3933 goto out;
fe650407 3934 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3935 if (status != 0)
3936 goto out;
3937 status = data->rpc_status;
3938 if (status != 0)
3939 goto out;
3940 nfs_refresh_inode(inode, &data->fattr);
3941out:
e6b3c4db 3942 rpc_put_task(task);
fe650407 3943 return status;
1da177e4
LT		 3944}
3945
e6f81075 3946int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3947{
3948 struct nfs_server *server = NFS_SERVER(inode);
3949 struct nfs4_exception exception = { };
3950 int err;
3951 do {
e6f81075 3952 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3953 switch (err) {
3954 case -NFS4ERR_STALE_STATEID:
3955 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3956 case 0:
3957 return 0;
3958 }
3959 err = nfs4_handle_exception(server, err, &exception);
3960 } while (exception.retry);
3961 return err;
3962}
3963
3964#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3965#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3966
3967/*
3968 * sleep, with exponential backoff, and retry the LOCK operation.
3969 */
3970static unsigned long
3971nfs4_set_lock_task_retry(unsigned long timeout)
3972{
150030b7 3973 schedule_timeout_killable(timeout);
1da177e4
LT		 3974 timeout <<= 1;
3975 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3976 return NFS4_LOCK_MAXTIMEOUT;
3977 return timeout;
3978}
3979
1da177e4
LT		 3980static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3981{
3982 struct inode *inode = state->inode;
3983 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3984 struct nfs_client *clp = server->nfs_client;
911d1aaf 3985 struct nfs_lockt_args arg = {
1da177e4 3986 .fh = NFS_FH(inode),
911d1aaf 3987 .fl = request,
1da177e4 3988 };
911d1aaf
TM		 3989 struct nfs_lockt_res res = {
3990 .denied = request,
1da177e4
LT		 3991 };
3992 struct rpc_message msg = {
3993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3994 .rpc_argp = &arg,
3995 .rpc_resp = &res,
3996 .rpc_cred = state->owner->so_cred,
3997 };
1da177e4
LT		 3998 struct nfs4_lock_state *lsp;
3999 int status;
4000
911d1aaf 4001 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4002 status = nfs4_set_lock_state(state, request);
4003 if (status != 0)
4004 goto out;
4005 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 4006 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4007 arg.lock_owner.s_dev = server->s_dev;
7c513058 4008 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4009 switch (status) {
4010 case 0:
4011 request->fl_type = F_UNLCK;
4012 break;
4013 case -NFS4ERR_DENIED:
4014 status = 0;
1da177e4 4015 }
70cc6487 4016 request->fl_ops->fl_release_private(request);
8d0a8a9d 4017out:
1da177e4
LT		 4018 return status;
4019}
4020
4021static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4022{
4023 struct nfs4_exception exception = { };
4024 int err;
4025
4026 do {
4027 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4028 _nfs4_proc_getlk(state, cmd, request),
4029 &exception);
4030 } while (exception.retry);
4031 return err;
4032}
4033
4034static int do_vfs_lock(struct file *file, struct file_lock *fl)
4035{
4036 int res = 0;
4037 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4038 case FL_POSIX:
4039 res = posix_lock_file_wait(file, fl);
4040 break;
4041 case FL_FLOCK:
4042 res = flock_lock_file_wait(file, fl);
4043 break;
4044 default:
4045 BUG();
4046 }
1da177e4
LT		 4047 return res;
4048}
4049
faf5f49c 4050struct nfs4_unlockdata {
911d1aaf
TM		 4051 struct nfs_locku_args arg;
4052 struct nfs_locku_res res;
faf5f49c
TM		 4053 struct nfs4_lock_state *lsp;
4054 struct nfs_open_context *ctx;
911d1aaf
TM		 4055 struct file_lock fl;
4056 const struct nfs_server *server;
26e976a8 4057 unsigned long timestamp;
faf5f49c
TM		 4058};
4059
911d1aaf
TM		 4060static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4061 struct nfs_open_context *ctx,
4062 struct nfs4_lock_state *lsp,
4063 struct nfs_seqid *seqid)
4064{
4065 struct nfs4_unlockdata *p;
4066 struct inode *inode = lsp->ls_state->inode;
4067
8535b2be 4068 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4069 if (p == NULL)
4070 return NULL;
4071 p->arg.fh = NFS_FH(inode);
4072 p->arg.fl = &p->fl;
4073 p->arg.seqid = seqid;
c1d51931 4074 p->res.seqid = seqid;
911d1aaf
TM		 4075 p->arg.stateid = &lsp->ls_stateid;
4076 p->lsp = lsp;
4077 atomic_inc(&lsp->ls_count);
4078 /* Ensure we don't close file until we're done freeing locks! */
4079 p->ctx = get_nfs_open_context(ctx);
4080 memcpy(&p->fl, fl, sizeof(p->fl));
4081 p->server = NFS_SERVER(inode);
4082 return p;
4083}
4084
06f814a3 4085static void nfs4_locku_release_calldata(void *data)
faf5f49c 4086{
963d8fe5 4087 struct nfs4_unlockdata *calldata = data;
911d1aaf 4088 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4089 nfs4_put_lock_state(calldata->lsp);
4090 put_nfs_open_context(calldata->ctx);
4091 kfree(calldata);
faf5f49c
TM		 4092}
4093
963d8fe5 4094static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4095{
963d8fe5 4096 struct nfs4_unlockdata *calldata = data;
faf5f49c 4097
14516c3a
TM		 4098 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4099 return;
faf5f49c
TM		 4100 switch (task->tk_status) {
4101 case 0:
4102 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4103 calldata->res.stateid.data,
faf5f49c 4104 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4105 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4106 break;
9e33bed5
TM		 4107 case -NFS4ERR_BAD_STATEID:
4108 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4109 case -NFS4ERR_STALE_STATEID:
4110 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4111 break;
4112 default:
9e33bed5 4113 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4114 nfs_restart_rpc(task,
d61e612a 4115 calldata->server->nfs_client);
faf5f49c 4116 }
faf5f49c
TM		 4117}
4118
4ce70ada 4119static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4120{
4ce70ada 4121 struct nfs4_unlockdata *calldata = data;
faf5f49c 4122
911d1aaf 4123 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4124 return;
4125 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4126 /* Note: exit _without_ running nfs4_locku_done */
4127 task->tk_action = NULL;
faf5f49c
TM		 4128 return;
4129 }
26e976a8 4130 calldata->timestamp = jiffies;
035168ab 4131 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4132 &calldata->arg.seq_args,
4133 &calldata->res.seq_res, 1, task))
4134 return;
5138fde0 4135 rpc_call_start(task);
faf5f49c
TM		 4136}
4137
963d8fe5 4138static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4139 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4140 .rpc_call_done = nfs4_locku_done,
06f814a3 4141 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4142};
4143
a5d16a4d
TM		 4144static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4145 struct nfs_open_context *ctx,
4146 struct nfs4_lock_state *lsp,
4147 struct nfs_seqid *seqid)
4148{
4149 struct nfs4_unlockdata *data;
5138fde0
TM		 4150 struct rpc_message msg = {
4151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4152 .rpc_cred = ctx->cred,
4153 };
c970aa85
TM		 4154 struct rpc_task_setup task_setup_data = {
4155 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4156 .rpc_message = &msg,
c970aa85 4157 .callback_ops = &nfs4_locku_ops,
101070ca 4158 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4159 .flags = RPC_TASK_ASYNC,
4160 };
a5d16a4d 4161
137d6aca
FF		 4162 /* Ensure this is an unlock - when canceling a lock, the
4163 * canceled lock is passed in, and it won't be an unlock.
4164 */
4165 fl->fl_type = F_UNLCK;
4166
a5d16a4d
TM		 4167 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4168 if (data == NULL) {
4169 nfs_free_seqid(seqid);
4170 return ERR_PTR(-ENOMEM);
4171 }
4172
1174dd1f
TM		 4173 msg.rpc_argp = &data->arg;
4174 msg.rpc_resp = &data->res;
c970aa85
TM		 4175 task_setup_data.callback_data = data;
4176 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4177}
4178
faf5f49c
TM		 4179static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4180{
19e03c57 4181 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4182 struct nfs_seqid *seqid;
1da177e4 4183 struct nfs4_lock_state *lsp;
06f814a3
TM		 4184 struct rpc_task *task;
4185 int status = 0;
536ff0f8 4186 unsigned char fl_flags = request->fl_flags;
faf5f49c 4187
8d0a8a9d 4188 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4189 /* Unlock _before_ we do the RPC call */
4190 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4191 down_read(&nfsi->rwsem);
4192 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4193 up_read(&nfsi->rwsem);
9b073574 4194 goto out;
19e03c57
TM		 4195 }
4196 up_read(&nfsi->rwsem);
8d0a8a9d 4197 if (status != 0)
9b073574
TM		 4198 goto out;
4199 /* Is this a delegated lock? */
4200 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4201 goto out;
8d0a8a9d 4202 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4203 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4204 status = -ENOMEM;
911d1aaf 4205 if (seqid == NULL)
9b073574 4206 goto out;
cd3758e3 4207 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4208 status = PTR_ERR(task);
4209 if (IS_ERR(task))
9b073574 4210 goto out;
a5d16a4d 4211 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4212 rpc_put_task(task);
9b073574 4213out:
536ff0f8 4214 request->fl_flags = fl_flags;
1da177e4
LT		 4215 return status;
4216}
4217
a5d16a4d
TM		 4218struct nfs4_lockdata {
4219 struct nfs_lock_args arg;
4220 struct nfs_lock_res res;
4221 struct nfs4_lock_state *lsp;
4222 struct nfs_open_context *ctx;
4223 struct file_lock fl;
26e976a8 4224 unsigned long timestamp;
a5d16a4d
TM		 4225 int rpc_status;
4226 int cancelled;
66179efe 4227 struct nfs_server *server;
a5d16a4d
TM		 4228};
4229
4230static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4231 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4232 gfp_t gfp_mask)
1da177e4 4233{
a5d16a4d
TM		 4234 struct nfs4_lockdata *p;
4235 struct inode *inode = lsp->ls_state->inode;
1da177e4 4236 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4237
8535b2be 4238 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4239 if (p == NULL)
4240 return NULL;
4241
4242 p->arg.fh = NFS_FH(inode);
4243 p->arg.fl = &p->fl;
8535b2be 4244 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4245 if (p->arg.open_seqid == NULL)
4246 goto out_free;
8535b2be 4247 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4248 if (p->arg.lock_seqid == NULL)
2f74c0a0 4249 goto out_free_seqid;
a5d16a4d 4250 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4251 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4252 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4253 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4254 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4255 p->lsp = lsp;
66179efe 4256 p->server = server;
a5d16a4d
TM		 4257 atomic_inc(&lsp->ls_count);
4258 p->ctx = get_nfs_open_context(ctx);
4259 memcpy(&p->fl, fl, sizeof(p->fl));
4260 return p;
2f74c0a0
TM		 4261out_free_seqid:
4262 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4263out_free:
4264 kfree(p);
4265 return NULL;
4266}
4267
4268static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4269{
4270 struct nfs4_lockdata *data = calldata;
4271 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4272
3110ff80 4273 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4274 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4275 return;
a5d16a4d
TM		 4276 /* Do we need to do an open_to_lock_owner? */
4277 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4278 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4279 return;
a5d16a4d
TM		 4280 data->arg.open_stateid = &state->stateid;
4281 data->arg.new_lock_owner = 1;
c1d51931 4282 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4283 } else
4284 data->arg.new_lock_owner = 0;
26e976a8 4285 data->timestamp = jiffies;
035168ab
TM		 4286 if (nfs4_setup_sequence(data->server,
4287 &data->arg.seq_args,
66179efe
AA		 4288 &data->res.seq_res, 1, task))
4289 return;
5138fde0 4290 rpc_call_start(task);
3110ff80 4291 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4292}
4293
b257957e
AB		 4294static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4295{
4296 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4297 nfs4_lock_prepare(task, calldata);
4298}
4299
a5d16a4d
TM		 4300static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4301{
4302 struct nfs4_lockdata *data = calldata;
4303
3110ff80 4304 dprintk("%s: begin!\n", __func__);
a5d16a4d 4305
14516c3a
TM		 4306 if (!nfs4_sequence_done(task, &data->res.seq_res))
4307 return;
66179efe 4308
a5d16a4d 4309 data->rpc_status = task->tk_status;
a5d16a4d 4310 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4311 if (data->rpc_status == 0)
4312 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4313 else
4314 goto out;
4315 }
4316 if (data->rpc_status == 0) {
4317 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4318 sizeof(data->lsp->ls_stateid.data));
4319 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3d4ff43d 4320 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4321 }
a5d16a4d 4322out:
3110ff80 4323 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4324}
4325
4326static void nfs4_lock_release(void *calldata)
4327{
4328 struct nfs4_lockdata *data = calldata;
4329
3110ff80 4330 dprintk("%s: begin!\n", __func__);
2f74c0a0 4331 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4332 if (data->cancelled != 0) {
4333 struct rpc_task *task;
4334 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4335 data->arg.lock_seqid);
4336 if (!IS_ERR(task))
bf294b41 4337 rpc_put_task_async(task);
3110ff80 4338 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4339 } else
4340 nfs_free_seqid(data->arg.lock_seqid);
4341 nfs4_put_lock_state(data->lsp);
4342 put_nfs_open_context(data->ctx);
4343 kfree(data);
3110ff80 4344 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4345}
4346
4347static const struct rpc_call_ops nfs4_lock_ops = {
4348 .rpc_call_prepare = nfs4_lock_prepare,
4349 .rpc_call_done = nfs4_lock_done,
4350 .rpc_release = nfs4_lock_release,
4351};
4352
b257957e
AB		 4353static const struct rpc_call_ops nfs4_recover_lock_ops = {
4354 .rpc_call_prepare = nfs4_recover_lock_prepare,
4355 .rpc_call_done = nfs4_lock_done,
4356 .rpc_release = nfs4_lock_release,
4357};
4358
2bee72a6
TM		 4359static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4360{
2bee72a6
TM		 4361 switch (error) {
4362 case -NFS4ERR_ADMIN_REVOKED:
4363 case -NFS4ERR_BAD_STATEID:
ecac799a 4364 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4365 if (new_lock_owner != 0 ||
4366 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4367 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4368 break;
4369 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4370 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4371 case -NFS4ERR_EXPIRED:
4372 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4373 };
4374}
4375
afe6c27c 4376static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4377{
4378 struct nfs4_lockdata *data;
4379 struct rpc_task *task;
5138fde0
TM		 4380 struct rpc_message msg = {
4381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4382 .rpc_cred = state->owner->so_cred,
4383 };
c970aa85
TM		 4384 struct rpc_task_setup task_setup_data = {
4385 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4386 .rpc_message = &msg,
c970aa85 4387 .callback_ops = &nfs4_lock_ops,
101070ca 4388 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4389 .flags = RPC_TASK_ASYNC,
4390 };
a5d16a4d
TM		 4391 int ret;
4392
3110ff80 4393 dprintk("%s: begin!\n", __func__);
cd3758e3 4394 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4395 fl->fl_u.nfs4_fl.owner,
4396 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4397 if (data == NULL)
4398 return -ENOMEM;
4399 if (IS_SETLKW(cmd))
4400 data->arg.block = 1;
b257957e
AB		 4401 if (recovery_type > NFS_LOCK_NEW) {
4402 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4403 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4404 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4405 }
1174dd1f
TM		 4406 msg.rpc_argp = &data->arg;
4407 msg.rpc_resp = &data->res;
c970aa85
TM		 4408 task_setup_data.callback_data = data;
4409 task = rpc_run_task(&task_setup_data);
7a1218a2 4410 if (IS_ERR(task))
a5d16a4d 4411 return PTR_ERR(task);
a5d16a4d
TM		 4412 ret = nfs4_wait_for_completion_rpc_task(task);
4413 if (ret == 0) {
4414 ret = data->rpc_status;
2bee72a6
TM		 4415 if (ret)
4416 nfs4_handle_setlk_error(data->server, data->lsp,
4417 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4418 } else
4419 data->cancelled = 1;
e6b3c4db 4420 rpc_put_task(task);
3110ff80 4421 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4422 return ret;
1da177e4
LT		 4423}
4424
4425static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4426{
202b50dc
TM		 4427 struct nfs_server *server = NFS_SERVER(state->inode);
4428 struct nfs4_exception exception = { };
4429 int err;
4430
4431 do {
42a2d13e
TM		 4432 /* Cache the lock if possible... */
4433 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4434 return 0;
afe6c27c 4435 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4436 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4437 break;
4438 nfs4_handle_exception(server, err, &exception);
4439 } while (exception.retry);
4440 return err;
1da177e4
LT		 4441}
4442
4443static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4444{
202b50dc
TM		 4445 struct nfs_server *server = NFS_SERVER(state->inode);
4446 struct nfs4_exception exception = { };
4447 int err;
4448
6bfc93ef
TM		 4449 err = nfs4_set_lock_state(state, request);
4450 if (err != 0)
4451 return err;
202b50dc 4452 do {
42a2d13e
TM		 4453 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4454 return 0;
afe6c27c 4455 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4456 switch (err) {
4457 default:
4458 goto out;
4459 case -NFS4ERR_GRACE:
4460 case -NFS4ERR_DELAY:
4461 nfs4_handle_exception(server, err, &exception);
4462 err = 0;
4463 }
202b50dc 4464 } while (exception.retry);
a9ed2e25 4465out:
202b50dc 4466 return err;
1da177e4
LT		 4467}
4468
f062eb6c
BS		 4469#if defined(CONFIG_NFS_V4_1)
4470static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4471{
4472 int status;
4473 struct nfs_server *server = NFS_SERVER(state->inode);
4474
4475 status = nfs41_test_stateid(server, state);
4476 if (status == NFS_OK)
4477 return 0;
4478 nfs41_free_stateid(server, state);
4479 return nfs4_lock_expired(state, request);
4480}
4481#endif
4482
1da177e4
LT		 4483static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4484{
19e03c57 4485 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4486 unsigned char fl_flags = request->fl_flags;
8e469ebd 4487 int status = -ENOLCK;
1da177e4 4488
8e469ebd
TM		 4489 if ((fl_flags & FL_POSIX) &&
4490 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4491 goto out;
6bfc93ef 4492 /* Is this a delegated open? */
6bfc93ef
TM		 4493 status = nfs4_set_lock_state(state, request);
4494 if (status != 0)
4495 goto out;
01c3b861
TM		 4496 request->fl_flags |= FL_ACCESS;
4497 status = do_vfs_lock(request->fl_file, request);
4498 if (status < 0)
4499 goto out;
19e03c57 4500 down_read(&nfsi->rwsem);
01c3b861 4501 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4502 /* Yes: cache locks! */
01c3b861 4503 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4504 request->fl_flags = fl_flags & ~FL_SLEEP;
4505 status = do_vfs_lock(request->fl_file, request);
4506 goto out_unlock;
01c3b861 4507 }
afe6c27c 4508 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4509 if (status != 0)
01c3b861 4510 goto out_unlock;
6bfc93ef 4511 /* Note: we always want to sleep here! */
01c3b861 4512 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4513 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4514 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4515out_unlock:
19e03c57 4516 up_read(&nfsi->rwsem);
01c3b861
TM		 4517out:
4518 request->fl_flags = fl_flags;
1da177e4
LT		 4519 return status;
4520}
4521
4522static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4523{
4524 struct nfs4_exception exception = { };
4525 int err;
4526
4527 do {
965b5d67
TM		 4528 err = _nfs4_proc_setlk(state, cmd, request);
4529 if (err == -NFS4ERR_DENIED)
4530 err = -EAGAIN;
1da177e4 4531 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4532 err, &exception);
1da177e4
LT		 4533 } while (exception.retry);
4534 return err;
4535}
4536
4537static int
4538nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4539{
4540 struct nfs_open_context *ctx;
4541 struct nfs4_state *state;
4542 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4543 int status;
4544
4545 /* verify open state */
cd3758e3 4546 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4547 state = ctx->state;
4548
4549 if (request->fl_start < 0 || request->fl_end < 0)
4550 return -EINVAL;
4551
d953126a
TM		 4552 if (IS_GETLK(cmd)) {
4553 if (state != NULL)
4554 return nfs4_proc_getlk(state, F_GETLK, request);
4555 return 0;
4556 }
1da177e4
LT		 4557
4558 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4559 return -EINVAL;
4560
d953126a
TM		 4561 if (request->fl_type == F_UNLCK) {
4562 if (state != NULL)
4563 return nfs4_proc_unlck(state, cmd, request);
4564 return 0;
4565 }
1da177e4 4566
d953126a
TM		 4567 if (state == NULL)
4568 return -ENOLCK;
1da177e4
LT		 4569 do {
4570 status = nfs4_proc_setlk(state, cmd, request);
4571 if ((status != -EAGAIN) || IS_SETLK(cmd))
4572 break;
4573 timeout = nfs4_set_lock_task_retry(timeout);
4574 status = -ERESTARTSYS;
4575 if (signalled())
4576 break;
4577 } while(status < 0);
1da177e4
LT		 4578 return status;
4579}
4580
888e694c
TM		 4581int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4582{
4583 struct nfs_server *server = NFS_SERVER(state->inode);
4584 struct nfs4_exception exception = { };
4585 int err;
4586
4587 err = nfs4_set_lock_state(state, fl);
4588 if (err != 0)
4589 goto out;
4590 do {
afe6c27c 4591 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4592 switch (err) {
4593 default:
4594 printk(KERN_ERR "%s: unhandled error %d.\n",
4595 __func__, err);
4596 case 0:
965b5d67 4597 case -ESTALE:
d5122201
TM		 4598 goto out;
4599 case -NFS4ERR_EXPIRED:
0ced63d1 4600 nfs4_schedule_stateid_recovery(server, state);
d5122201 4601 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4602 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4603 nfs4_schedule_lease_recovery(server->nfs_client);
4604 goto out;
74e7bb73
RL		 4605 case -NFS4ERR_BADSESSION:
4606 case -NFS4ERR_BADSLOT:
4607 case -NFS4ERR_BAD_HIGH_SLOT:
4608 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4609 case -NFS4ERR_DEADSESSION:
0400a6b0 4610 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4611 goto out;
965b5d67
TM		 4612 case -ERESTARTSYS:
4613 /*
4614 * The show must go on: exit, but mark the
4615 * stateid as needing recovery.
4616 */
4617 case -NFS4ERR_ADMIN_REVOKED:
4618 case -NFS4ERR_BAD_STATEID:
4619 case -NFS4ERR_OPENMODE:
0400a6b0 4620 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4621 err = 0;
4622 goto out;
168667c4
TM		 4623 case -EKEYEXPIRED:
4624 /*
4625 * User RPCSEC_GSS context has expired.
4626 * We cannot recover this stateid now, so
4627 * skip it and allow recovery thread to
4628 * proceed.
4629 */
4630 err = 0;
4631 goto out;
965b5d67
TM		 4632 case -ENOMEM:
4633 case -NFS4ERR_DENIED:
4634 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4635 err = 0;
4636 goto out;
d5122201
TM		 4637 case -NFS4ERR_DELAY:
4638 break;
4639 }
888e694c
TM		 4640 err = nfs4_handle_exception(server, err, &exception);
4641 } while (exception.retry);
4642out:
4643 return err;
4644}
6b3b5496 4645
d3c7b7cc
TM		 4646static void nfs4_release_lockowner_release(void *calldata)
4647{
4648 kfree(calldata);
4649}
4650
4651const struct rpc_call_ops nfs4_release_lockowner_ops = {
4652 .rpc_release = nfs4_release_lockowner_release,
4653};
4654
4655void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4656{
4657 struct nfs_server *server = lsp->ls_state->owner->so_server;
4658 struct nfs_release_lockowner_args *args;
4659 struct rpc_message msg = {
4660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4661 };
4662
4663 if (server->nfs_client->cl_mvops->minor_version != 0)
4664 return;
4665 args = kmalloc(sizeof(*args), GFP_NOFS);
4666 if (!args)
4667 return;
4668 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4669 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4670 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4671 msg.rpc_argp = args;
4672 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4673}
4674
aa1870af
BF		 4675#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4676
64c2ce8b
AK		 4677static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4678 const void *buf, size_t buflen,
4679 int flags, int type)
6b3b5496 4680{
64c2ce8b
AK		 4681 if (strcmp(key, "") != 0)
4682 return -EINVAL;
4b580ee3 4683
64c2ce8b 4684 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4685}
4686
64c2ce8b
AK		 4687static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4688 void *buf, size_t buflen, int type)
6b3b5496 4689{
64c2ce8b
AK		 4690 if (strcmp(key, "") != 0)
4691 return -EINVAL;
aa1870af 4692
64c2ce8b 4693 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4694}
4695
64c2ce8b
AK		 4696static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4697 size_t list_len, const char *name,
4698 size_t name_len, int type)
6b3b5496 4699{
64c2ce8b 4700 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4701
096455a2
BF		 4702 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4703 return 0;
64c2ce8b
AK		 4704
4705 if (list && len <= list_len)
4706 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4707 return len;
6b3b5496
BF		 4708}
4709
533eb461
AA		 4710/*
4711 * nfs_fhget will use either the mounted_on_fileid or the fileid
4712 */
69aaaae1
TM		 4713static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4714{
533eb461
AA		 4715 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4716 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4717 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4718 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
69aaaae1
TM		 4719 return;
4720
4721 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4722 NFS_ATTR_FATTR_NLINK;
4723 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4724 fattr->nlink = 2;
4725}
4726
56659e99 4727int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4728 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4729{
4730 struct nfs_server *server = NFS_SERVER(dir);
4731 u32 bitmask[2] = {
361e624f 4732 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 4733 };
4734 struct nfs4_fs_locations_arg args = {
4735 .dir_fh = NFS_FH(dir),
c228fd3a 4736 .name = name,
683b57b4
TM		 4737 .page = page,
4738 .bitmask = bitmask,
4739 };
22958463
BH		 4740 struct nfs4_fs_locations_res res = {
4741 .fs_locations = fs_locations,
4742 };
683b57b4
TM		 4743 struct rpc_message msg = {
4744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4745 .rpc_argp = &args,
22958463 4746 .rpc_resp = &res,
683b57b4
TM		 4747 };
4748 int status;
4749
3110ff80 4750 dprintk("%s: start\n", __func__);
533eb461
AA		 4751
4752 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4753 * is not supported */
4754 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4755 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4756 else
4757 bitmask[0] |= FATTR4_WORD0_FILEID;
4758
c228fd3a 4759 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4760 fs_locations->server = server;
830b8e33 4761 fs_locations->nlocations = 0;
7c513058 4762 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 4763 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4764 return status;
4765}
4766
5a5ea0d4
BS		 4767static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4768{
4769 int status;
4770 struct nfs4_secinfo_arg args = {
4771 .dir_fh = NFS_FH(dir),
4772 .name = name,
4773 };
4774 struct nfs4_secinfo_res res = {
4775 .flavors = flavors,
4776 };
4777 struct rpc_message msg = {
4778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4779 .rpc_argp = &args,
4780 .rpc_resp = &res,
4781 };
4782
4783 dprintk("NFS call secinfo %s\n", name->name);
4784 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4785 dprintk("NFS reply secinfo: %d\n", status);
4786 return status;
4787}
4788
4789int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4790{
4791 struct nfs4_exception exception = { };
4792 int err;
4793 do {
4794 err = nfs4_handle_exception(NFS_SERVER(dir),
4795 _nfs4_proc_secinfo(dir, name, flavors),
4796 &exception);
4797 } while (exception.retry);
4798 return err;
4799}
4800
557134a3 4801#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4802/*
4803 * Check the exchange flags returned by the server for invalid flags, having
4804 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4805 * DS flags set.
4806 */
4807static int nfs4_check_cl_exchange_flags(u32 flags)
4808{
4809 if (flags & ~EXCHGID4_FLAG_MASK_R)
4810 goto out_inval;
4811 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4812 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4813 goto out_inval;
4814 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4815 goto out_inval;
4816 return NFS_OK;
4817out_inval:
4818 return -NFS4ERR_INVAL;
4819}
4820
78fe0f41
WAA		 4821static bool
4822nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4823{
4824 if (a->server_scope_sz == b->server_scope_sz &&
4825 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4826 return true;
4827
4828 return false;
4829}
4830
99fe60d0
BH		 4831/*
4832 * nfs4_proc_exchange_id()
4833 *
4834 * Since the clientid has expired, all compounds using sessions
4835 * associated with the stale clientid will be returning
4836 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4837 * be in some phase of session reset.
4838 */
4d643d1d 4839int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4840{
4841 nfs4_verifier verifier;
4842 struct nfs41_exchange_id_args args = {
4843 .client = clp,
357f54d6 4844 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4845 };
4846 struct nfs41_exchange_id_res res = {
4847 .client = clp,
4848 };
4849 int status;
4850 struct rpc_message msg = {
4851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4852 .rpc_argp = &args,
4853 .rpc_resp = &res,
4854 .rpc_cred = cred,
4855 };
4856 __be32 *p;
4857
4858 dprintk("--> %s\n", __func__);
4859 BUG_ON(clp == NULL);
a7b72103 4860
99fe60d0
BH		 4861 p = (u32 *)verifier.data;
4862 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4863 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4864 args.verifier = &verifier;
4865
c7a360b0
AA		 4866 args.id_len = scnprintf(args.id, sizeof(args.id),
4867 "%s/%s.%s/%u",
4868 clp->cl_ipaddr,
4869 init_utsname()->nodename,
4870 init_utsname()->domainname,
4871 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4872
78fe0f41
WAA		 4873 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4874 if (unlikely(!res.server_scope))
4875 return -ENOMEM;
4876
1bd714f2 4877 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4878 if (!status)
4879 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
78fe0f41
WAA		 4880
4881 if (!status) {
4882 if (clp->server_scope &&
4883 !nfs41_same_server_scope(clp->server_scope,
4884 res.server_scope)) {
4885 dprintk("%s: server_scope mismatch detected\n",
4886 __func__);
4887 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4888 kfree(clp->server_scope);
4889 clp->server_scope = NULL;
4890 }
4891
4892 if (!clp->server_scope)
4893 clp->server_scope = res.server_scope;
4894 else
4895 kfree(res.server_scope);
4896 }
4897
99fe60d0
BH		 4898 dprintk("<-- %s status= %d\n", __func__, status);
4899 return status;
4900}
4901
2050f0cc
AA		 4902struct nfs4_get_lease_time_data {
4903 struct nfs4_get_lease_time_args *args;
4904 struct nfs4_get_lease_time_res *res;
4905 struct nfs_client *clp;
4906};
4907
4908static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4909 void *calldata)
4910{
4911 int ret;
4912 struct nfs4_get_lease_time_data *data =
4913 (struct nfs4_get_lease_time_data *)calldata;
4914
4915 dprintk("--> %s\n", __func__);
689cf5c1 4916 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4917 /* just setup sequence, do not trigger session recovery
4918 since we're invoked within one */
4919 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4920 &data->args->la_seq_args,
4921 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4922
4923 BUG_ON(ret == -EAGAIN);
4924 rpc_call_start(task);
4925 dprintk("<-- %s\n", __func__);
4926}
4927
4928/*
4929 * Called from nfs4_state_manager thread for session setup, so don't recover
4930 * from sequence operation or clientid errors.
4931 */
4932static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4933{
4934 struct nfs4_get_lease_time_data *data =
4935 (struct nfs4_get_lease_time_data *)calldata;
4936
4937 dprintk("--> %s\n", __func__);
14516c3a
TM		 4938 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4939 return;
2050f0cc
AA		 4940 switch (task->tk_status) {
4941 case -NFS4ERR_DELAY:
4942 case -NFS4ERR_GRACE:
4943 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4944 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4945 task->tk_status = 0;
a8a4ae3a
AA		 4946 /* fall through */
4947 case -NFS4ERR_RETRY_UNCACHED_REP:
0110ee15 4948 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4949 return;
4950 }
2050f0cc
AA		 4951 dprintk("<-- %s\n", __func__);
4952}
4953
4954struct rpc_call_ops nfs4_get_lease_time_ops = {
4955 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4956 .rpc_call_done = nfs4_get_lease_time_done,
4957};
4958
4959int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4960{
4961 struct rpc_task *task;
4962 struct nfs4_get_lease_time_args args;
4963 struct nfs4_get_lease_time_res res = {
4964 .lr_fsinfo = fsinfo,
4965 };
4966 struct nfs4_get_lease_time_data data = {
4967 .args = &args,
4968 .res = &res,
4969 .clp = clp,
4970 };
4971 struct rpc_message msg = {
4972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4973 .rpc_argp = &args,
4974 .rpc_resp = &res,
4975 };
4976 struct rpc_task_setup task_setup = {
4977 .rpc_client = clp->cl_rpcclient,
4978 .rpc_message = &msg,
4979 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 4980 .callback_data = &data,
4981 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 4982 };
4983 int status;
4984
2050f0cc
AA		 4985 dprintk("--> %s\n", __func__);
4986 task = rpc_run_task(&task_setup);
4987
4988 if (IS_ERR(task))
4989 status = PTR_ERR(task);
4990 else {
4991 status = task->tk_status;
4992 rpc_put_task(task);
4993 }
4994 dprintk("<-- %s return %d\n", __func__, status);
4995
4996 return status;
4997}
4998
b73dafa7
RL		 4999/*
5000 * Reset a slot table
5001 */
104aeba4
AA		 5002static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5003 int ivalue)
ac72b7b3 5004{
104aeba4 5005 struct nfs4_slot *new = NULL;
b73dafa7 5006 int i;
ac72b7b3
AA		 5007 int ret = 0;
5008
104aeba4
AA		 5009 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5010 max_reqs, tbl->max_slots);
ac72b7b3 5011
104aeba4
AA		 5012 /* Does the newly negotiated max_reqs match the existing slot table? */
5013 if (max_reqs != tbl->max_slots) {
5014 ret = -ENOMEM;
5015 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 5016 GFP_NOFS);
104aeba4
AA		 5017 if (!new)
5018 goto out;
5019 ret = 0;
5020 kfree(tbl->slots);
ac72b7b3
AA		 5021 }
5022 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 5023 if (new) {
5024 tbl->slots = new;
5025 tbl->max_slots = max_reqs;
5026 }
5027 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 5028 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 5029 spin_unlock(&tbl->slot_tbl_lock);
5030 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5031 tbl, tbl->slots, tbl->max_slots);
5032out:
5033 dprintk("<-- %s: return %d\n", __func__, ret);
5034 return ret;
5035}
5036
b73dafa7
RL		 5037/*
5038 * Reset the forechannel and backchannel slot tables
5039 */
5040static int nfs4_reset_slot_tables(struct nfs4_session *session)
5041{
5042 int status;
5043
5044 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 5045 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 5046 if (status)
5047 return status;
5048
5049 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 5050 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 5051 return status;
5052}
5053
f8625a6a
RL		 5054/* Destroy the slot table */
5055static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5056{
5057 if (session->fc_slot_table.slots != NULL) {
5058 kfree(session->fc_slot_table.slots);
5059 session->fc_slot_table.slots = NULL;
5060 }
5061 if (session->bc_slot_table.slots != NULL) {
5062 kfree(session->bc_slot_table.slots);
5063 session->bc_slot_table.slots = NULL;
5064 }
5065 return;
5066}
5067
fc931582
AA		 5068/*
5069 * Initialize slot table
5070 */
050047ce
RL		 5071static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5072 int max_slots, int ivalue)
fc931582 5073{
fc931582
AA		 5074 struct nfs4_slot *slot;
5075 int ret = -ENOMEM;
5076
5077 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5078
050047ce 5079 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 5080
8535b2be 5081 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 5082 if (!slot)
5083 goto out;
fc931582
AA		 5084 ret = 0;
5085
5086 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 5087 tbl->max_slots = max_slots;
5088 tbl->slots = slot;
5089 tbl->highest_used_slotid = -1; /* no slot is currently used */
5090 spin_unlock(&tbl->slot_tbl_lock);
5091 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5092 tbl, tbl->slots, tbl->max_slots);
5093out:
5094 dprintk("<-- %s: return %d\n", __func__, ret);
5095 return ret;
fc931582
AA		 5096}
5097
050047ce
RL		 5098/*
5099 * Initialize the forechannel and backchannel tables
5100 */
5101static int nfs4_init_slot_tables(struct nfs4_session *session)
5102{
f26468fb
TM		 5103 struct nfs4_slot_table *tbl;
5104 int status = 0;
050047ce 5105
f26468fb
TM		 5106 tbl = &session->fc_slot_table;
5107 if (tbl->slots == NULL) {
5108 status = nfs4_init_slot_table(tbl,
5109 session->fc_attrs.max_reqs, 1);
5110 if (status)
5111 return status;
5112 }
050047ce 5113
f26468fb
TM		 5114 tbl = &session->bc_slot_table;
5115 if (tbl->slots == NULL) {
5116 status = nfs4_init_slot_table(tbl,
5117 session->bc_attrs.max_reqs, 0);
5118 if (status)
5119 nfs4_destroy_slot_tables(session);
5120 }
f8625a6a
RL		 5121
5122 return status;
557134a3
AA		 5123}
5124
5125struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5126{
5127 struct nfs4_session *session;
5128 struct nfs4_slot_table *tbl;
5129
8535b2be 5130 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5131 if (!session)
5132 return NULL;
76db6d95 5133
557134a3 5134 tbl = &session->fc_slot_table;
9dfdf404 5135 tbl->highest_used_slotid = -1;
557134a3 5136 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5137 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5138 init_completion(&tbl->complete);
f8625a6a
RL		 5139
5140 tbl = &session->bc_slot_table;
9dfdf404 5141 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5142 spin_lock_init(&tbl->slot_tbl_lock);
5143 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5144 init_completion(&tbl->complete);
f8625a6a 5145
1055d76d
TM		 5146 session->session_state = 1<<NFS4_SESSION_INITING;
5147
557134a3
AA		 5148 session->clp = clp;
5149 return session;
5150}
5151
5152void nfs4_destroy_session(struct nfs4_session *session)
5153{
5a0ffe54
AA		 5154 nfs4_proc_destroy_session(session);
5155 dprintk("%s Destroy backchannel for xprt %p\n",
5156 __func__, session->clp->cl_rpcclient->cl_xprt);
5157 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5158 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5159 nfs4_destroy_slot_tables(session);
557134a3
AA		 5160 kfree(session);
5161}
5162
fc931582
AA		 5163/*
5164 * Initialize the values to be used by the client in CREATE_SESSION
5165 * If nfs4_init_session set the fore channel request and response sizes,
5166 * use them.
5167 *
5168 * Set the back channel max_resp_sz_cached to zero to force the client to
5169 * always set csa_cachethis to FALSE because the current implementation
5170 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5171 */
5172static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5173{
5174 struct nfs4_session *session = args->client->cl_session;
5175 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5176 mxresp_sz = session->fc_attrs.max_resp_sz;
5177
5178 if (mxrqst_sz == 0)
5179 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5180 if (mxresp_sz == 0)
5181 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5182 /* Fore channel attributes */
fc931582
AA		 5183 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5184 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5185 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5186 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5187
5188 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5189 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5190 __func__,
5191 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5192 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5193
5194 /* Back channel attributes */
fc931582
AA		 5195 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5196 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5197 args->bc_attrs.max_resp_sz_cached = 0;
5198 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5199 args->bc_attrs.max_reqs = 1;
5200
5201 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5202 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5203 __func__,
5204 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5205 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5206 args->bc_attrs.max_reqs);
5207}
5208
43c2e885 5209static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5210{
43c2e885
BF		 5211 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5212 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5213
43c2e885
BF		 5214 if (rcvd->max_resp_sz > sent->max_resp_sz)
5215 return -EINVAL;
5216 /*
5217 * Our requested max_ops is the minimum we need; we're not
5218 * prepared to break up compounds into smaller pieces than that.
5219 * So, no point even trying to continue if the server won't
5220 * cooperate:
5221 */
5222 if (rcvd->max_ops < sent->max_ops)
5223 return -EINVAL;
5224 if (rcvd->max_reqs == 0)
5225 return -EINVAL;
5226 return 0;
8d35301d
AA		 5227}
5228
43c2e885
BF		 5229static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5230{
5231 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5232 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5233
43c2e885
BF		 5234 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5235 return -EINVAL;
5236 if (rcvd->max_resp_sz < sent->max_resp_sz)
5237 return -EINVAL;
5238 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5239 return -EINVAL;
5240 /* These would render the backchannel useless: */
5241 if (rcvd->max_ops == 0)
5242 return -EINVAL;
5243 if (rcvd->max_reqs == 0)
5244 return -EINVAL;
5245 return 0;
5246}
8d35301d 5247
8d35301d
AA		 5248static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5249 struct nfs4_session *session)
5250{
43c2e885 5251 int ret;
8d35301d 5252
43c2e885
BF		 5253 ret = nfs4_verify_fore_channel_attrs(args, session);
5254 if (ret)
5255 return ret;
5256 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5257}
5258
fc931582
AA		 5259static int _nfs4_proc_create_session(struct nfs_client *clp)
5260{
5261 struct nfs4_session *session = clp->cl_session;
5262 struct nfs41_create_session_args args = {
5263 .client = clp,
5264 .cb_program = NFS4_CALLBACK,
5265 };
5266 struct nfs41_create_session_res res = {
5267 .client = clp,
5268 };
5269 struct rpc_message msg = {
5270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5271 .rpc_argp = &args,
5272 .rpc_resp = &res,
5273 };
5274 int status;
5275
5276 nfs4_init_channel_attrs(&args);
0f91421e 5277 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5278
1bd714f2 5279 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5280
8d35301d
AA		 5281 if (!status)
5282 /* Verify the session's negotiated channel_attrs values */
5283 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5284 if (!status) {
5285 /* Increment the clientid slot sequence id */
5286 clp->cl_seqid++;
5287 }
5288
5289 return status;
5290}
5291
5292/*
5293 * Issues a CREATE_SESSION operation to the server.
5294 * It is the responsibility of the caller to verify the session is
5295 * expired before calling this routine.
5296 */
f26468fb 5297int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5298{
5299 int status;
5300 unsigned *ptr;
fc931582
AA		 5301 struct nfs4_session *session = clp->cl_session;
5302
5303 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5304
fd954ae1 5305 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5306 if (status)
5307 goto out;
5308
f26468fb
TM		 5309 /* Init and reset the fore channel */
5310 status = nfs4_init_slot_tables(session);
5311 dprintk("slot table initialization returned %d\n", status);
5312 if (status)
5313 goto out;
5314 status = nfs4_reset_slot_tables(session);
5315 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5316 if (status)
5317 goto out;
5318
5319 ptr = (unsigned *)&session->sess_id.data[0];
5320 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5321 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5322out:
5323 dprintk("<-- %s\n", __func__);
5324 return status;
5325}
5326
0f3e66c6
AA		 5327/*
5328 * Issue the over-the-wire RPC DESTROY_SESSION.
5329 * The caller must serialize access to this routine.
5330 */
5331int nfs4_proc_destroy_session(struct nfs4_session *session)
5332{
5333 int status = 0;
5334 struct rpc_message msg;
5335
5336 dprintk("--> nfs4_proc_destroy_session\n");
5337
5338 /* session is still being setup */
5339 if (session->clp->cl_cons_state != NFS_CS_READY)
5340 return status;
5341
5342 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5343 msg.rpc_argp = session;
5344 msg.rpc_resp = NULL;
5345 msg.rpc_cred = NULL;
1bd714f2 5346 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5347
5348 if (status)
5349 printk(KERN_WARNING
5350 "Got error %d from the server on DESTROY_SESSION. "
5351 "Session has been destroyed regardless...\n", status);
5352
5353 dprintk("<-- nfs4_proc_destroy_session\n");
5354 return status;
5355}
5356
fccba804
TM		 5357int nfs4_init_session(struct nfs_server *server)
5358{
5359 struct nfs_client *clp = server->nfs_client;
2449ea2e 5360 struct nfs4_session *session;
68bf05ef 5361 unsigned int rsize, wsize;
fccba804
TM		 5362 int ret;
5363
5364 if (!nfs4_has_session(clp))
5365 return 0;
5366
1055d76d
TM		 5367 session = clp->cl_session;
5368 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5369 return 0;
5370
68bf05ef
AA		 5371 rsize = server->rsize;
5372 if (rsize == 0)
5373 rsize = NFS_MAX_FILE_IO_SIZE;
5374 wsize = server->wsize;
5375 if (wsize == 0)
5376 wsize = NFS_MAX_FILE_IO_SIZE;
5377
68bf05ef
AA		 5378 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5379 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5380
fccba804
TM		 5381 ret = nfs4_recover_expired_lease(server);
5382 if (!ret)
5383 ret = nfs4_check_client_ready(clp);
5384 return ret;
5385}
5386
d83217c1
AA		 5387int nfs4_init_ds_session(struct nfs_client *clp)
5388{
5389 struct nfs4_session *session = clp->cl_session;
5390 int ret;
5391
5392 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5393 return 0;
5394
5395 ret = nfs4_client_recover_expired_lease(clp);
5396 if (!ret)
5397 /* Test for the DS role */
5398 if (!is_ds_client(clp))
5399 ret = -ENODEV;
5400 if (!ret)
5401 ret = nfs4_check_client_ready(clp);
5402 return ret;
5403
5404}
5405EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5406
5407
fc01cea9
AA		 5408/*
5409 * Renew the cl_session lease.
5410 */
d5f8d3fe
TM		 5411struct nfs4_sequence_data {
5412 struct nfs_client *clp;
5413 struct nfs4_sequence_args args;
5414 struct nfs4_sequence_res res;
5415};
5416
dc96aef9
AB		 5417static void nfs41_sequence_release(void *data)
5418{
d5f8d3fe
TM		 5419 struct nfs4_sequence_data *calldata = data;
5420 struct nfs_client *clp = calldata->clp;
dc96aef9 5421
7135840f
AB		 5422 if (atomic_read(&clp->cl_count) > 1)
5423 nfs4_schedule_state_renewal(clp);
5424 nfs_put_client(clp);
d5f8d3fe 5425 kfree(calldata);
dc96aef9
AB		 5426}
5427
aa5190d0
TM		 5428static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5429{
5430 switch(task->tk_status) {
5431 case -NFS4ERR_DELAY:
aa5190d0
TM		 5432 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5433 return -EAGAIN;
5434 default:
0400a6b0 5435 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5436 }
5437 return 0;
5438}
5439
dc96aef9 5440static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5441{
d5f8d3fe
TM		 5442 struct nfs4_sequence_data *calldata = data;
5443 struct nfs_client *clp = calldata->clp;
fc01cea9 5444
14516c3a
TM		 5445 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5446 return;
fc01cea9
AA		 5447
5448 if (task->tk_status < 0) {
5449 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5450 if (atomic_read(&clp->cl_count) == 1)
5451 goto out;
fc01cea9 5452
aa5190d0
TM		 5453 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5454 rpc_restart_call_prepare(task);
fc01cea9
AA		 5455 return;
5456 }
5457 }
fc01cea9 5458 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5459out:
fc01cea9
AA		 5460 dprintk("<-- %s\n", __func__);
5461}
5462
5463static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5464{
d5f8d3fe
TM		 5465 struct nfs4_sequence_data *calldata = data;
5466 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5467 struct nfs4_sequence_args *args;
5468 struct nfs4_sequence_res *res;
5469
fc01cea9
AA		 5470 args = task->tk_msg.rpc_argp;
5471 res = task->tk_msg.rpc_resp;
5472
035168ab 5473 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5474 return;
5475 rpc_call_start(task);
5476}
5477
5478static const struct rpc_call_ops nfs41_sequence_ops = {
5479 .rpc_call_done = nfs41_sequence_call_done,
5480 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5481 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5482};
5483
71ac6da9 5484static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5485{
d5f8d3fe 5486 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5487 struct rpc_message msg = {
5488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5489 .rpc_cred = cred,
5490 };
71ac6da9
TM		 5491 struct rpc_task_setup task_setup_data = {
5492 .rpc_client = clp->cl_rpcclient,
5493 .rpc_message = &msg,
5494 .callback_ops = &nfs41_sequence_ops,
5495 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5496 };
fc01cea9 5497
7135840f 5498 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5499 return ERR_PTR(-EIO);
dfb4f309 5500 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5501 if (calldata == NULL) {
7135840f 5502 nfs_put_client(clp);
71ac6da9 5503 return ERR_PTR(-ENOMEM);
fc01cea9 5504 }
d5f8d3fe
TM		 5505 msg.rpc_argp = &calldata->args;
5506 msg.rpc_resp = &calldata->res;
5507 calldata->clp = clp;
71ac6da9 5508 task_setup_data.callback_data = calldata;
fc01cea9 5509
71ac6da9
TM		 5510 return rpc_run_task(&task_setup_data);
5511}
5512
2f60ea6b 5513static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5514{
5515 struct rpc_task *task;
5516 int ret = 0;
5517
2f60ea6b
TM		 5518 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5519 return 0;
71ac6da9
TM		 5520 task = _nfs41_proc_sequence(clp, cred);
5521 if (IS_ERR(task))
5522 ret = PTR_ERR(task);
5523 else
bf294b41 5524 rpc_put_task_async(task);
71ac6da9
TM		 5525 dprintk("<-- %s status=%d\n", __func__, ret);
5526 return ret;
5527}
5528
5529static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5530{
5531 struct rpc_task *task;
5532 int ret;
5533
5534 task = _nfs41_proc_sequence(clp, cred);
5535 if (IS_ERR(task)) {
5536 ret = PTR_ERR(task);
5537 goto out;
5538 }
5539 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5540 if (!ret) {
5541 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5542
5543 if (task->tk_status == 0)
5544 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5545 ret = task->tk_status;
b4410c2f 5546 }
71ac6da9
TM		 5547 rpc_put_task(task);
5548out:
5549 dprintk("<-- %s status=%d\n", __func__, ret);
5550 return ret;
fc01cea9
AA		 5551}
5552
fce5c838
RL		 5553struct nfs4_reclaim_complete_data {
5554 struct nfs_client *clp;
5555 struct nfs41_reclaim_complete_args arg;
5556 struct nfs41_reclaim_complete_res res;
5557};
5558
5559static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5560{
5561 struct nfs4_reclaim_complete_data *calldata = data;
5562
b257957e 5563 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5564 if (nfs41_setup_sequence(calldata->clp->cl_session,
5565 &calldata->arg.seq_args,
fce5c838
RL		 5566 &calldata->res.seq_res, 0, task))
5567 return;
5568
5569 rpc_call_start(task);
5570}
5571
aa5190d0
TM		 5572static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5573{
5574 switch(task->tk_status) {
5575 case 0:
5576 case -NFS4ERR_COMPLETE_ALREADY:
5577 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5578 break;
5579 case -NFS4ERR_DELAY:
aa5190d0 5580 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5581 /* fall through */
5582 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5583 return -EAGAIN;
5584 default:
0400a6b0 5585 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5586 }
5587 return 0;
5588}
5589
fce5c838
RL		 5590static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5591{
5592 struct nfs4_reclaim_complete_data *calldata = data;
5593 struct nfs_client *clp = calldata->clp;
5594 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5595
5596 dprintk("--> %s\n", __func__);
14516c3a
TM		 5597 if (!nfs41_sequence_done(task, res))
5598 return;
fce5c838 5599
aa5190d0
TM		 5600 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5601 rpc_restart_call_prepare(task);
5602 return;
5603 }
fce5c838
RL		 5604 dprintk("<-- %s\n", __func__);
5605}
5606
5607static void nfs4_free_reclaim_complete_data(void *data)
5608{
5609 struct nfs4_reclaim_complete_data *calldata = data;
5610
5611 kfree(calldata);
5612}
5613
5614static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5615 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5616 .rpc_call_done = nfs4_reclaim_complete_done,
5617 .rpc_release = nfs4_free_reclaim_complete_data,
5618};
5619
5620/*
5621 * Issue a global reclaim complete.
5622 */
5623static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5624{
5625 struct nfs4_reclaim_complete_data *calldata;
5626 struct rpc_task *task;
5627 struct rpc_message msg = {
5628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5629 };
5630 struct rpc_task_setup task_setup_data = {
5631 .rpc_client = clp->cl_rpcclient,
5632 .rpc_message = &msg,
5633 .callback_ops = &nfs4_reclaim_complete_call_ops,
5634 .flags = RPC_TASK_ASYNC,
5635 };
5636 int status = -ENOMEM;
5637
5638 dprintk("--> %s\n", __func__);
8535b2be 5639 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5640 if (calldata == NULL)
5641 goto out;
5642 calldata->clp = clp;
5643 calldata->arg.one_fs = 0;
fce5c838
RL		 5644
5645 msg.rpc_argp = &calldata->arg;
5646 msg.rpc_resp = &calldata->res;
5647 task_setup_data.callback_data = calldata;
5648 task = rpc_run_task(&task_setup_data);
acf82b85 5649 if (IS_ERR(task)) {
fce5c838 5650 status = PTR_ERR(task);
acf82b85
DC		 5651 goto out;
5652 }
c34c32ea
AA		 5653 status = nfs4_wait_for_completion_rpc_task(task);
5654 if (status == 0)
5655 status = task->tk_status;
fce5c838 5656 rpc_put_task(task);
acf82b85 5657 return 0;
fce5c838
RL		 5658out:
5659 dprintk("<-- %s status=%d\n", __func__, status);
5660 return status;
5661}
b1f69b75
AA		 5662
5663static void
5664nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5665{
5666 struct nfs4_layoutget *lgp = calldata;
c31663d4 5667 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5668
5669 dprintk("--> %s\n", __func__);
c31663d4
FI		 5670 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5671 * right now covering the LAYOUTGET we are about to send.
5672 * However, that is not so catastrophic, and there seems
5673 * to be no way to prevent it completely.
5674 */
b1f69b75
AA		 5675 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5676 &lgp->res.seq_res, 0, task))
5677 return;
cf7d63f1
FI		 5678 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5679 NFS_I(lgp->args.inode)->layout,
5680 lgp->args.ctx->state)) {
5681 rpc_exit(task, NFS4_OK);
5682 return;
5683 }
b1f69b75
AA		 5684 rpc_call_start(task);
5685}
5686
5687static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5688{
5689 struct nfs4_layoutget *lgp = calldata;
5690 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5691
5692 dprintk("--> %s\n", __func__);
5693
5694 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5695 return;
5696
5697 switch (task->tk_status) {
5698 case 0:
5699 break;
5700 case -NFS4ERR_LAYOUTTRYLATER:
5701 case -NFS4ERR_RECALLCONFLICT:
5702 task->tk_status = -NFS4ERR_DELAY;
5703 /* Fall through */
5704 default:
5705 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5706 rpc_restart_call_prepare(task);
5707 return;
5708 }
5709 }
b1f69b75
AA		 5710 dprintk("<-- %s\n", __func__);
5711}
5712
5713static void nfs4_layoutget_release(void *calldata)
5714{
5715 struct nfs4_layoutget *lgp = calldata;
5716
5717 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5718 put_nfs_open_context(lgp->args.ctx);
5719 kfree(calldata);
5720 dprintk("<-- %s\n", __func__);
5721}
5722
5723static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5724 .rpc_call_prepare = nfs4_layoutget_prepare,
5725 .rpc_call_done = nfs4_layoutget_done,
5726 .rpc_release = nfs4_layoutget_release,
5727};
5728
5729int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5730{
5731 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5732 struct rpc_task *task;
5733 struct rpc_message msg = {
5734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5735 .rpc_argp = &lgp->args,
5736 .rpc_resp = &lgp->res,
5737 };
5738 struct rpc_task_setup task_setup_data = {
5739 .rpc_client = server->client,
5740 .rpc_message = &msg,
5741 .callback_ops = &nfs4_layoutget_call_ops,
5742 .callback_data = lgp,
5743 .flags = RPC_TASK_ASYNC,
5744 };
5745 int status = 0;
5746
5747 dprintk("--> %s\n", __func__);
5748
35124a09 5749 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5750 lgp->res.seq_res.sr_slot = NULL;
5751 task = rpc_run_task(&task_setup_data);
5752 if (IS_ERR(task))
5753 return PTR_ERR(task);
5754 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5755 if (status == 0)
5756 status = task->tk_status;
5757 if (status == 0)
5758 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5759 rpc_put_task(task);
5760 dprintk("<-- %s status=%d\n", __func__, status);
5761 return status;
5762}
5763
cbe82603
BH		 5764static void
5765nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5766{
5767 struct nfs4_layoutreturn *lrp = calldata;
5768
5769 dprintk("--> %s\n", __func__);
5770 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5771 &lrp->res.seq_res, 0, task))
5772 return;
5773 rpc_call_start(task);
5774}
5775
5776static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5777{
5778 struct nfs4_layoutreturn *lrp = calldata;
5779 struct nfs_server *server;
a56aaa02 5780 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 5781
5782 dprintk("--> %s\n", __func__);
5783
5784 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5785 return;
5786
5787 server = NFS_SERVER(lrp->args.inode);
5788 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5789 nfs_restart_rpc(task, lrp->clp);
5790 return;
5791 }
a2e1d4f2 5792 spin_lock(&lo->plh_inode->i_lock);
cbe82603 5793 if (task->tk_status == 0) {
cbe82603 5794 if (lrp->res.lrs_present) {
cbe82603 5795 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
cbe82603
BH		 5796 } else
5797 BUG_ON(!list_empty(&lo->plh_segs));
5798 }
a2e1d4f2
FI		 5799 lo->plh_block_lgets--;
5800 spin_unlock(&lo->plh_inode->i_lock);
cbe82603
BH		 5801 dprintk("<-- %s\n", __func__);
5802}
5803
5804static void nfs4_layoutreturn_release(void *calldata)
5805{
5806 struct nfs4_layoutreturn *lrp = calldata;
5807
5808 dprintk("--> %s\n", __func__);
a56aaa02 5809 put_layout_hdr(lrp->args.layout);
cbe82603
BH		 5810 kfree(calldata);
5811 dprintk("<-- %s\n", __func__);
5812}
5813
5814static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5815 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5816 .rpc_call_done = nfs4_layoutreturn_done,
5817 .rpc_release = nfs4_layoutreturn_release,
5818};
5819
5820int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5821{
5822 struct rpc_task *task;
5823 struct rpc_message msg = {
5824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5825 .rpc_argp = &lrp->args,
5826 .rpc_resp = &lrp->res,
5827 };
5828 struct rpc_task_setup task_setup_data = {
5829 .rpc_client = lrp->clp->cl_rpcclient,
5830 .rpc_message = &msg,
5831 .callback_ops = &nfs4_layoutreturn_call_ops,
5832 .callback_data = lrp,
5833 };
5834 int status;
5835
5836 dprintk("--> %s\n", __func__);
5837 task = rpc_run_task(&task_setup_data);
5838 if (IS_ERR(task))
5839 return PTR_ERR(task);
5840 status = task->tk_status;
5841 dprintk("<-- %s status=%d\n", __func__, status);
5842 rpc_put_task(task);
5843 return status;
5844}
5845
7f11d8d3
AA		 5846/*
5847 * Retrieve the list of Data Server devices from the MDS.
5848 */
5849static int _nfs4_getdevicelist(struct nfs_server *server,
5850 const struct nfs_fh *fh,
5851 struct pnfs_devicelist *devlist)
5852{
5853 struct nfs4_getdevicelist_args args = {
5854 .fh = fh,
5855 .layoutclass = server->pnfs_curr_ld->id,
5856 };
5857 struct nfs4_getdevicelist_res res = {
5858 .devlist = devlist,
5859 };
5860 struct rpc_message msg = {
5861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5862 .rpc_argp = &args,
5863 .rpc_resp = &res,
5864 };
5865 int status;
5866
5867 dprintk("--> %s\n", __func__);
5868 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5869 &res.seq_res, 0);
5870 dprintk("<-- %s status=%d\n", __func__, status);
5871 return status;
5872}
5873
5874int nfs4_proc_getdevicelist(struct nfs_server *server,
5875 const struct nfs_fh *fh,
5876 struct pnfs_devicelist *devlist)
5877{
5878 struct nfs4_exception exception = { };
5879 int err;
5880
5881 do {
5882 err = nfs4_handle_exception(server,
5883 _nfs4_getdevicelist(server, fh, devlist),
5884 &exception);
5885 } while (exception.retry);
5886
5887 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5888 err, devlist->num_devs);
5889
5890 return err;
5891}
5892EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5893
b1f69b75
AA		 5894static int
5895_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5896{
5897 struct nfs4_getdeviceinfo_args args = {
5898 .pdev = pdev,
5899 };
5900 struct nfs4_getdeviceinfo_res res = {
5901 .pdev = pdev,
5902 };
5903 struct rpc_message msg = {
5904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5905 .rpc_argp = &args,
5906 .rpc_resp = &res,
5907 };
5908 int status;
5909
5910 dprintk("--> %s\n", __func__);
7c513058 5911 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5912 dprintk("<-- %s status=%d\n", __func__, status);
5913
5914 return status;
5915}
5916
5917int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5918{
5919 struct nfs4_exception exception = { };
5920 int err;
5921
5922 do {
5923 err = nfs4_handle_exception(server,
5924 _nfs4_proc_getdeviceinfo(server, pdev),
5925 &exception);
5926 } while (exception.retry);
5927 return err;
5928}
5929EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5930
863a3c6c
AA		 5931static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5932{
5933 struct nfs4_layoutcommit_data *data = calldata;
5934 struct nfs_server *server = NFS_SERVER(data->args.inode);
5935
5936 if (nfs4_setup_sequence(server, &data->args.seq_args,
5937 &data->res.seq_res, 1, task))
5938 return;
5939 rpc_call_start(task);
5940}
5941
5942static void
5943nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5944{
5945 struct nfs4_layoutcommit_data *data = calldata;
5946 struct nfs_server *server = NFS_SERVER(data->args.inode);
5947
5948 if (!nfs4_sequence_done(task, &data->res.seq_res))
5949 return;
5950
5951 switch (task->tk_status) { /* Just ignore these failures */
5952 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5953 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5954 case NFS4ERR_BADLAYOUT: /* no layout */
5955 case NFS4ERR_GRACE: /* loca_recalim always false */
5956 task->tk_status = 0;
5957 }
5958
5959 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5960 nfs_restart_rpc(task, server->nfs_client);
5961 return;
5962 }
5963
5964 if (task->tk_status == 0)
5965 nfs_post_op_update_inode_force_wcc(data->args.inode,
5966 data->res.fattr);
5967}
5968
5969static void nfs4_layoutcommit_release(void *calldata)
5970{
5971 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 5972 struct pnfs_layout_segment *lseg, *tmp;
863a3c6c 5973
db29c089 5974 pnfs_cleanup_layoutcommit(data);
863a3c6c 5975 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 5976 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5977 list_del_init(&lseg->pls_lc_list);
5978 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5979 &lseg->pls_flags))
5980 put_lseg(lseg);
5981 }
863a3c6c
AA		 5982 put_rpccred(data->cred);
5983 kfree(data);
5984}
5985
5986static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5987 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5988 .rpc_call_done = nfs4_layoutcommit_done,
5989 .rpc_release = nfs4_layoutcommit_release,
5990};
5991
5992int
ef311537 5993nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5994{
5995 struct rpc_message msg = {
5996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5997 .rpc_argp = &data->args,
5998 .rpc_resp = &data->res,
5999 .rpc_cred = data->cred,
6000 };
6001 struct rpc_task_setup task_setup_data = {
6002 .task = &data->task,
6003 .rpc_client = NFS_CLIENT(data->args.inode),
6004 .rpc_message = &msg,
6005 .callback_ops = &nfs4_layoutcommit_ops,
6006 .callback_data = data,
6007 .flags = RPC_TASK_ASYNC,
6008 };
6009 struct rpc_task *task;
6010 int status = 0;
6011
6012 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6013 "lbw: %llu inode %lu\n",
6014 data->task.tk_pid, sync,
6015 data->args.lastbytewritten,
6016 data->args.inode->i_ino);
6017
6018 task = rpc_run_task(&task_setup_data);
6019 if (IS_ERR(task))
6020 return PTR_ERR(task);
ef311537 6021 if (sync == false)
863a3c6c
AA		 6022 goto out;
6023 status = nfs4_wait_for_completion_rpc_task(task);
6024 if (status != 0)
6025 goto out;
6026 status = task->tk_status;
6027out:
6028 dprintk("%s: status %d\n", __func__, status);
6029 rpc_put_task(task);
6030 return status;
6031}
fca78d6d
BS		 6032
6033static int
6034_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6035 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6036{
6037 struct nfs41_secinfo_no_name_args args = {
6038 .style = SECINFO_STYLE_CURRENT_FH,
6039 };
6040 struct nfs4_secinfo_res res = {
6041 .flavors = flavors,
6042 };
6043 struct rpc_message msg = {
6044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6045 .rpc_argp = &args,
6046 .rpc_resp = &res,
6047 };
6048 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6049}
6050
6051static int
6052nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6053 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6054{
6055 struct nfs4_exception exception = { };
6056 int err;
6057 do {
6058 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6059 switch (err) {
6060 case 0:
6061 case -NFS4ERR_WRONGSEC:
6062 case -NFS4ERR_NOTSUPP:
6063 break;
6064 default:
6065 err = nfs4_handle_exception(server, err, &exception);
6066 }
6067 } while (exception.retry);
6068 return err;
6069}
6070
6071static int
6072nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6073 struct nfs_fsinfo *info)
6074{
6075 int err;
6076 struct page *page;
6077 rpc_authflavor_t flavor;
6078 struct nfs4_secinfo_flavors *flavors;
6079
6080 page = alloc_page(GFP_KERNEL);
6081 if (!page) {
6082 err = -ENOMEM;
6083 goto out;
6084 }
6085
6086 flavors = page_address(page);
6087 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6088
6089 /*
6090 * Fall back on "guess and check" method if
6091 * the server doesn't support SECINFO_NO_NAME
6092 */
6093 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6094 err = nfs4_find_root_sec(server, fhandle, info);
6095 goto out_freepage;
6096 }
6097 if (err)
6098 goto out_freepage;
6099
6100 flavor = nfs_find_best_sec(flavors);
6101 if (err == 0)
6102 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6103
6104out_freepage:
6105 put_page(page);
6106 if (err == -EACCES)
6107 return -EPERM;
6108out:
6109 return err;
6110}
7d974794
BS		 6111static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6112{
6113 int status;
6114 struct nfs41_test_stateid_args args = {
6115 .stateid = &state->stateid,
6116 };
6117 struct nfs41_test_stateid_res res;
6118 struct rpc_message msg = {
6119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6120 .rpc_argp = &args,
6121 .rpc_resp = &res,
6122 };
6123 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6124 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6125 return status;
6126}
6127
6128static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6129{
6130 struct nfs4_exception exception = { };
6131 int err;
6132 do {
6133 err = nfs4_handle_exception(server,
6134 _nfs41_test_stateid(server, state),
6135 &exception);
6136 } while (exception.retry);
6137 return err;
6138}
9aeda35f
BS		 6139
6140static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6141{
6142 int status;
6143 struct nfs41_free_stateid_args args = {
6144 .stateid = &state->stateid,
6145 };
6146 struct nfs41_free_stateid_res res;
6147 struct rpc_message msg = {
6148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6149 .rpc_argp = &args,
6150 .rpc_resp = &res,
6151 };
6152
6153 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6154 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6155 return status;
6156}
6157
6158static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6159{
6160 struct nfs4_exception exception = { };
6161 int err;
6162 do {
6163 err = nfs4_handle_exception(server,
6164 _nfs4_free_stateid(server, state),
6165 &exception);
6166 } while (exception.retry);
6167 return err;
6168}
557134a3
AA		 6169#endif /* CONFIG_NFS_V4_1 */
6170
591d71cb 6171struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6172 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6173 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6174 .recover_open = nfs4_open_reclaim,
6175 .recover_lock = nfs4_lock_reclaim,
591d71cb 6176 .establish_clid = nfs4_init_clientid,
90a16617 6177 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 6178};
6179
591d71cb
AA		 6180#if defined(CONFIG_NFS_V4_1)
6181struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6182 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6183 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6184 .recover_open = nfs4_open_reclaim,
6185 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6186 .establish_clid = nfs41_init_clientid,
b4b82607 6187 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6188 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 6189};
6190#endif /* CONFIG_NFS_V4_1 */
6191
6192struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6193 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6194 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6195 .recover_open = nfs4_open_expired,
6196 .recover_lock = nfs4_lock_expired,
6197 .establish_clid = nfs4_init_clientid,
90a16617 6198 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6199};
6200
6201#if defined(CONFIG_NFS_V4_1)
6202struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6203 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6204 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6205 .recover_open = nfs41_open_expired,
6206 .recover_lock = nfs41_lock_expired,
4d643d1d 6207 .establish_clid = nfs41_init_clientid,
b4b82607 6208 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6209};
591d71cb 6210#endif /* CONFIG_NFS_V4_1 */
1da177e4 6211
29fba38b
BH		 6212struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6213 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6214 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6215 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6216};
6217
6218#if defined(CONFIG_NFS_V4_1)
6219struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6220 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6221 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6222 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6223};
6224#endif
6225
97dc1359
TM		 6226static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6227 .minor_version = 0,
6228 .call_sync = _nfs4_call_sync,
e047a10c 6229 .validate_stateid = nfs4_validate_delegation_stateid,
fca78d6d 6230 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6231 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6232 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6233 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6234};
6235
6236#if defined(CONFIG_NFS_V4_1)
6237static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6238 .minor_version = 1,
6239 .call_sync = _nfs4_call_sync_session,
e047a10c 6240 .validate_stateid = nfs41_validate_delegation_stateid,
fca78d6d 6241 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6242 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6243 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6244 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6245};
6246#endif
6247
97dc1359
TM		 6248const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6249 [0] = &nfs_v4_0_minor_ops,
6250#if defined(CONFIG_NFS_V4_1)
6251 [1] = &nfs_v4_1_minor_ops,
6252#endif
6253};
6254
92e1d5be 6255static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6256 .permission = nfs_permission,
6257 .getattr = nfs_getattr,
6258 .setattr = nfs_setattr,
64c2ce8b
AK		 6259 .getxattr = generic_getxattr,
6260 .setxattr = generic_setxattr,
6261 .listxattr = generic_listxattr,
6262 .removexattr = generic_removexattr,
6b3b5496
BF		 6263};
6264
509de811 6265const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6266 .version = 4, /* protocol version */
6267 .dentry_ops = &nfs4_dentry_operations,
6268 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6269 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 6270 .getroot = nfs4_proc_get_root,
6271 .getattr = nfs4_proc_getattr,
6272 .setattr = nfs4_proc_setattr,
2b3de441 6273 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 6274 .lookup = nfs4_proc_lookup,
6275 .access = nfs4_proc_access,
6276 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6277 .create = nfs4_proc_create,
6278 .remove = nfs4_proc_remove,
6279 .unlink_setup = nfs4_proc_unlink_setup,
6280 .unlink_done = nfs4_proc_unlink_done,
6281 .rename = nfs4_proc_rename,
d3d4152a
JL		 6282 .rename_setup = nfs4_proc_rename_setup,
6283 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6284 .link = nfs4_proc_link,
6285 .symlink = nfs4_proc_symlink,
6286 .mkdir = nfs4_proc_mkdir,
6287 .rmdir = nfs4_proc_remove,
6288 .readdir = nfs4_proc_readdir,
6289 .mknod = nfs4_proc_mknod,
6290 .statfs = nfs4_proc_statfs,
6291 .fsinfo = nfs4_proc_fsinfo,
6292 .pathconf = nfs4_proc_pathconf,
e9326dca 6293 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6294 .decode_dirent = nfs4_decode_dirent,
6295 .read_setup = nfs4_proc_read_setup,
ec06c096 6296 .read_done = nfs4_read_done,
1da177e4 6297 .write_setup = nfs4_proc_write_setup,
788e7a89 6298 .write_done = nfs4_write_done,
1da177e4 6299 .commit_setup = nfs4_proc_commit_setup,
788e7a89 6300 .commit_done = nfs4_commit_done,
1da177e4 6301 .lock = nfs4_proc_lock,
e50a1c2e 6302 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6303 .close_context = nfs4_close_context,
2b484297 6304 .open_context = nfs4_atomic_open,
45a52a02 6305 .init_client = nfs4_init_client,
5a5ea0d4 6306 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 6307};
6308
64c2ce8b
AK		 6309static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6310 .prefix = XATTR_NAME_NFSV4_ACL,
6311 .list = nfs4_xattr_list_nfs4_acl,
6312 .get = nfs4_xattr_get_nfs4_acl,
6313 .set = nfs4_xattr_set_nfs4_acl,
6314};
6315
6316const struct xattr_handler *nfs4_xattr_handlers[] = {
6317 &nfs4_xattr_nfs4_acl_handler,
6318 NULL
6319};
6320
1da177e4
LT		 6321/*
6322 * Local variables:
6323 * c-basic-offset: 8
6324 * End:
6325 */
Linux 6.x block layer and io_uring tree(s)