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NFS: lookup supports alternate client
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4
LT		 43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 52#include <linux/xattr.h>
c7a360b0 53#include <linux/utsname.h>
1da177e4 54
4ce79717 55#include "nfs4_fs.h"
1da177e4 56#include "delegation.h"
101070ca 57#include "internal.h"
006ea73e 58#include "iostat.h"
fc931582 59#include "callback.h"
b1f69b75 60#include "pnfs.h"
1da177e4
LT		 61
62#define NFSDBG_FACILITY NFSDBG_PROC
63
2066fe89 64#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 65#define NFS4_POLL_RETRY_MAX (15*HZ)
66
a78cb57a
TM		 67#define NFS4_MAX_LOOP_ON_RECOVER (10)
68
cdd4e68b 69struct nfs4_opendata;
864472e9 70static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 71static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 72static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 73static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
7c513058
BS		 74static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
75 const struct qstr *name, struct nfs_fh *fhandle,
76 struct nfs_fattr *fattr);
9936781d 77static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 78static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
79 struct nfs_fattr *fattr, struct iattr *sattr,
80 struct nfs4_state *state);
1da177e4 81
1da177e4 82/* Prevent leaks of NFSv4 errors into userland */
46f72f57 83static int nfs4_map_errors(int err)
1da177e4 84{
52567b03
TM		 85 if (err >= -1000)
86 return err;
87 switch (err) {
88 case -NFS4ERR_RESOURCE:
89 return -EREMOTEIO;
3ddeb7c5
TM		 90 case -NFS4ERR_BADOWNER:
91 case -NFS4ERR_BADNAME:
92 return -EINVAL;
52567b03 93 default:
1da177e4 94 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 95 __func__, -err);
52567b03 96 break;
1da177e4 97 }
52567b03 98 return -EIO;
1da177e4
LT		 99}
100
101/*
102 * This is our standard bitmap for GETATTR requests.
103 */
104const u32 nfs4_fattr_bitmap[2] = {
105 FATTR4_WORD0_TYPE
106 | FATTR4_WORD0_CHANGE
107 | FATTR4_WORD0_SIZE
108 | FATTR4_WORD0_FSID
109 | FATTR4_WORD0_FILEID,
110 FATTR4_WORD1_MODE
111 | FATTR4_WORD1_NUMLINKS
112 | FATTR4_WORD1_OWNER
113 | FATTR4_WORD1_OWNER_GROUP
114 | FATTR4_WORD1_RAWDEV
115 | FATTR4_WORD1_SPACE_USED
116 | FATTR4_WORD1_TIME_ACCESS
117 | FATTR4_WORD1_TIME_METADATA
118 | FATTR4_WORD1_TIME_MODIFY
119};
120
121const u32 nfs4_statfs_bitmap[2] = {
122 FATTR4_WORD0_FILES_AVAIL
123 | FATTR4_WORD0_FILES_FREE
124 | FATTR4_WORD0_FILES_TOTAL,
125 FATTR4_WORD1_SPACE_AVAIL
126 | FATTR4_WORD1_SPACE_FREE
127 | FATTR4_WORD1_SPACE_TOTAL
128};
129
4ce79717 130const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 131 FATTR4_WORD0_MAXLINK
132 | FATTR4_WORD0_MAXNAME,
133 0
134};
135
136const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
137 | FATTR4_WORD0_MAXREAD
138 | FATTR4_WORD0_MAXWRITE
139 | FATTR4_WORD0_LEASE_TIME,
55b6e774 140 FATTR4_WORD1_TIME_DELTA
504913fb 141 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 142};
143
830b8e33
MN		 144const u32 nfs4_fs_locations_bitmap[2] = {
145 FATTR4_WORD0_TYPE
146 | FATTR4_WORD0_CHANGE
147 | FATTR4_WORD0_SIZE
148 | FATTR4_WORD0_FSID
149 | FATTR4_WORD0_FILEID
150 | FATTR4_WORD0_FS_LOCATIONS,
151 FATTR4_WORD1_MODE
152 | FATTR4_WORD1_NUMLINKS
153 | FATTR4_WORD1_OWNER
154 | FATTR4_WORD1_OWNER_GROUP
155 | FATTR4_WORD1_RAWDEV
156 | FATTR4_WORD1_SPACE_USED
157 | FATTR4_WORD1_TIME_ACCESS
158 | FATTR4_WORD1_TIME_METADATA
159 | FATTR4_WORD1_TIME_MODIFY
160 | FATTR4_WORD1_MOUNTED_ON_FILEID
161};
162
bc4785cd 163static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 164 struct nfs4_readdir_arg *readdir)
165{
0dbb4c67 166 __be32 *start, *p;
1da177e4
LT		 167
168 BUG_ON(readdir->count < 80);
169 if (cookie > 2) {
b7ef1956 170 readdir->cookie = cookie;
1da177e4
LT		 171 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
172 return;
173 }
174
175 readdir->cookie = 0;
176 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
177 if (cookie == 2)
178 return;
179
180 /*
181 * NFSv4 servers do not return entries for '.' and '..'
182 * Therefore, we fake these entries here. We let '.'
183 * have cookie 0 and '..' have cookie 1. Note that
184 * when talking to the server, we always send cookie 0
185 * instead of 1 or 2.
186 */
0dbb4c67 187 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 188
189 if (cookie == 0) {
190 *p++ = xdr_one; /* next */
191 *p++ = xdr_zero; /* cookie, first word */
192 *p++ = xdr_one; /* cookie, second word */
193 *p++ = xdr_one; /* entry len */
194 memcpy(p, ".\0\0\0", 4); /* entry */
195 p++;
196 *p++ = xdr_one; /* bitmap length */
197 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
198 *p++ = htonl(8); /* attribute buffer length */
4e769b93 199 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 200 }
201
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_two; /* cookie, second word */
205 *p++ = xdr_two; /* entry len */
206 memcpy(p, "..\0\0", 4); /* entry */
207 p++;
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
4e769b93 211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 212
213 readdir->pgbase = (char *)p - (char *)start;
214 readdir->count -= readdir->pgbase;
215 kunmap_atomic(start, KM_USER0);
216}
217
65de872e
TM		 218static int nfs4_wait_clnt_recover(struct nfs_client *clp)
219{
220 int res;
221
222 might_sleep();
223
e005e804 224 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 225 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 226 return res;
227}
228
229static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
230{
231 int res = 0;
232
233 might_sleep();
234
235 if (*timeout <= 0)
236 *timeout = NFS4_POLL_RETRY_MIN;
237 if (*timeout > NFS4_POLL_RETRY_MAX)
238 *timeout = NFS4_POLL_RETRY_MAX;
239 schedule_timeout_killable(*timeout);
240 if (fatal_signal_pending(current))
241 res = -ERESTARTSYS;
242 *timeout <<= 1;
243 return res;
244}
245
246/* This is the error handling routine for processes that are allowed
247 * to sleep.
248 */
b064eca2 249static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 250{
251 struct nfs_client *clp = server->nfs_client;
9e33bed5 252 struct nfs4_state *state = exception->state;
65de872e
TM		 253 int ret = errorcode;
254
255 exception->retry = 0;
256 switch(errorcode) {
257 case 0:
258 return 0;
9e33bed5
TM		 259 case -NFS4ERR_ADMIN_REVOKED:
260 case -NFS4ERR_BAD_STATEID:
261 case -NFS4ERR_OPENMODE:
262 if (state == NULL)
263 break;
0400a6b0
TM		 264 nfs4_schedule_stateid_recovery(server, state);
265 goto wait_on_recovery;
65de872e 266 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 267 case -NFS4ERR_STALE_CLIENTID:
65de872e 268 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 269 nfs4_schedule_lease_recovery(clp);
270 goto wait_on_recovery;
03391693 271#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 272 case -NFS4ERR_BADSESSION:
273 case -NFS4ERR_BADSLOT:
274 case -NFS4ERR_BAD_HIGH_SLOT:
275 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
276 case -NFS4ERR_DEADSESSION:
277 case -NFS4ERR_SEQ_FALSE_RETRY:
278 case -NFS4ERR_SEQ_MISORDERED:
279 dprintk("%s ERROR: %d Reset session\n", __func__,
280 errorcode);
0400a6b0 281 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 282 exception->retry = 1;
b9179237 283 break;
03391693 284#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 285 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 286 if (exception->timeout > HZ) {
287 /* We have retried a decent amount, time to
288 * fail
289 */
290 ret = -EBUSY;
291 break;
292 }
65de872e
TM		 293 case -NFS4ERR_GRACE:
294 case -NFS4ERR_DELAY:
2c643488 295 case -EKEYEXPIRED:
65de872e
TM		 296 ret = nfs4_delay(server->client, &exception->timeout);
297 if (ret != 0)
298 break;
299 case -NFS4ERR_OLD_STATEID:
300 exception->retry = 1;
b064eca2
TM		 301 break;
302 case -NFS4ERR_BADOWNER:
303 /* The following works around a Linux server bug! */
304 case -NFS4ERR_BADNAME:
305 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
306 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
307 exception->retry = 1;
308 printk(KERN_WARNING "NFS: v4 server %s "
309 "does not accept raw "
310 "uid/gids. "
311 "Reenabling the idmapper.\n",
312 server->nfs_client->cl_hostname);
313 }
65de872e
TM		 314 }
315 /* We failed to handle the error */
316 return nfs4_map_errors(ret);
0400a6b0 317wait_on_recovery:
a2c0b9e2
TM		 318 ret = nfs4_wait_clnt_recover(clp);
319 if (ret == 0)
320 exception->retry = 1;
321 return ret;
65de872e
TM		 322}
323
324
452e9352 325static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 326{
1da177e4
LT		 327 spin_lock(&clp->cl_lock);
328 if (time_before(clp->cl_last_renewal,timestamp))
329 clp->cl_last_renewal = timestamp;
330 spin_unlock(&clp->cl_lock);
331}
332
452e9352
TM		 333static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
334{
335 do_renew_lease(server->nfs_client, timestamp);
336}
337
cccef3b9
AA		 338#if defined(CONFIG_NFS_V4_1)
339
e2c4ab3c
AA		 340/*
341 * nfs4_free_slot - free a slot and efficiently update slot table.
342 *
343 * freeing a slot is trivially done by clearing its respective bit
344 * in the bitmap.
345 * If the freed slotid equals highest_used_slotid we want to update it
346 * so that the server would be able to size down the slot table if needed,
347 * otherwise we know that the highest_used_slotid is still in use.
348 * When updating highest_used_slotid there may be "holes" in the bitmap
349 * so we need to scan down from highest_used_slotid to 0 looking for the now
350 * highest slotid in use.
351 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 352 *
353 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 354 */
355static void
dfb4f309 356nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 357{
dfb4f309 358 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 359 int slotid = free_slotid;
360
dfb4f309 361 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 362 /* clear used bit in bitmap */
363 __clear_bit(slotid, tbl->used_slots);
364
365 /* update highest_used_slotid when it is freed */
366 if (slotid == tbl->highest_used_slotid) {
367 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 368 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 369 tbl->highest_used_slotid = slotid;
370 else
371 tbl->highest_used_slotid = -1;
372 }
e2c4ab3c
AA		 373 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
374 free_slotid, tbl->highest_used_slotid);
375}
376
3bfb0fc5 377/*
42acd021 378 * Signal state manager thread if session fore channel is drained
3bfb0fc5 379 */
42acd021 380static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 381{
689cf5c1
AB		 382 struct rpc_task *task;
383
a2118c33 384 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 385 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
386 if (task)
387 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 388 return;
389 }
390
391 if (ses->fc_slot_table.highest_used_slotid != -1)
392 return;
393
42acd021
AA		 394 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
395 complete(&ses->fc_slot_table.complete);
396}
397
398/*
399 * Signal state manager thread if session back channel is drained
400 */
401void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
402{
403 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
404 ses->bc_slot_table.highest_used_slotid != -1)
405 return;
406 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
407 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 408}
409
d185a334 410static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 411{
412 struct nfs4_slot_table *tbl;
413
d185a334 414 tbl = &res->sr_session->fc_slot_table;
dfb4f309 415 if (!res->sr_slot) {
13615871
AA		 416 /* just wake up the next guy waiting since
417 * we may have not consumed a slot after all */
691daf3b 418 dprintk("%s: No slot\n", __func__);
35dc1d74 419 return;
13615871 420 }
ea028ac9 421
35dc1d74 422 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 423 nfs4_free_slot(tbl, res->sr_slot);
42acd021 424 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 425 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 426 res->sr_slot = NULL;
13615871
AA		 427}
428
14516c3a 429static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 430{
431 unsigned long timestamp;
14516c3a 432 struct nfs_client *clp;
b0df806c
AA		 433
434 /*
435 * sr_status remains 1 if an RPC level error occurred. The server
436 * may or may not have processed the sequence operation..
437 * Proceed as if the server received and processed the sequence
438 * operation.
439 */
440 if (res->sr_status == 1)
441 res->sr_status = NFS_OK;
442
443 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
dfb4f309 444 if (!res->sr_slot)
b0df806c
AA		 445 goto out;
446
691daf3b 447 /* Check the SEQUENCE operation status */
14516c3a
TM		 448 switch (res->sr_status) {
449 case 0:
b0df806c 450 /* Update the slot's sequence and clientid lease timer */
dfb4f309 451 ++res->sr_slot->seq_nr;
b0df806c 452 timestamp = res->sr_renewal_time;
14516c3a 453 clp = res->sr_session->clp;
452e9352 454 do_renew_lease(clp, timestamp);
0629e370 455 /* Check sequence flags */
b4410c2f
TM		 456 if (res->sr_status_flags != 0)
457 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 458 break;
459 case -NFS4ERR_DELAY:
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
462 * of RFC5661.
463 */
12364a4f 464 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 465 __func__,
466 res->sr_slot - res->sr_session->fc_slot_table.slots,
467 res->sr_slot->seq_nr);
14516c3a
TM		 468 goto out_retry;
469 default:
470 /* Just update the slot sequence no. */
dfb4f309 471 ++res->sr_slot->seq_nr;
b0df806c
AA		 472 }
473out:
474 /* The session may be reset by one of the error handlers. */
475 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 476 nfs41_sequence_free_slot(res);
14516c3a
TM		 477 return 1;
478out_retry:
d05dd4e9 479 if (!rpc_restart_call(task))
14516c3a
TM		 480 goto out;
481 rpc_delay(task, NFS4_POLL_RETRY_MAX);
482 return 0;
b0df806c
AA		 483}
484
14516c3a
TM		 485static int nfs4_sequence_done(struct rpc_task *task,
486 struct nfs4_sequence_res *res)
df896455 487{
14516c3a
TM		 488 if (res->sr_session == NULL)
489 return 1;
490 return nfs41_sequence_done(task, res);
df896455
TM		 491}
492
510b8175
BH		 493/*
494 * nfs4_find_slot - efficiently look for a free slot
495 *
496 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
497 * If found, we mark the slot as used, update the highest_used_slotid,
498 * and respectively set up the sequence operation args.
499 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 500 *
501 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 502 */
503static u8
40ead580 504nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 505{
506 int slotid;
507 u8 ret_id = NFS4_MAX_SLOT_TABLE;
508 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
509
510b8175
BH		 510 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
511 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
512 tbl->max_slots);
513 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
514 if (slotid >= tbl->max_slots)
515 goto out;
516 __set_bit(slotid, tbl->used_slots);
517 if (slotid > tbl->highest_used_slotid)
518 tbl->highest_used_slotid = slotid;
519 ret_id = slotid;
520out:
521 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
522 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 523 return ret_id;
524}
525
dc70d7b3 526int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 527 struct nfs4_sequence_args *args,
528 struct nfs4_sequence_res *res,
529 int cache_reply,
530 struct rpc_task *task)
531{
fbcd4abc
AA		 532 struct nfs4_slot *slot;
533 struct nfs4_slot_table *tbl;
534 u8 slotid;
535
536 dprintk("--> %s\n", __func__);
ce5039c1 537 /* slot already allocated? */
dfb4f309 538 if (res->sr_slot != NULL)
ce5039c1
AA		 539 return 0;
540
fbcd4abc
AA		 541 tbl = &session->fc_slot_table;
542
543 spin_lock(&tbl->slot_tbl_lock);
a2118c33 544 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 545 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 546 /*
547 * The state manager will wait until the slot table is empty.
548 * Schedule the reset thread
549 */
05f0d236 550 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 551 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 552 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 553 return -EAGAIN;
b069d94a
AA		 554 }
555
689cf5c1
AB		 556 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
557 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
558 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
559 spin_unlock(&tbl->slot_tbl_lock);
560 dprintk("%s enforce FIFO order\n", __func__);
561 return -EAGAIN;
562 }
563
40ead580 564 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 565 if (slotid == NFS4_MAX_SLOT_TABLE) {
566 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
567 spin_unlock(&tbl->slot_tbl_lock);
568 dprintk("<-- %s: no free slots\n", __func__);
569 return -EAGAIN;
570 }
571 spin_unlock(&tbl->slot_tbl_lock);
572
689cf5c1 573 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 574 slot = tbl->slots + slotid;
99fe60d0 575 args->sa_session = session;
fbcd4abc
AA		 576 args->sa_slotid = slotid;
577 args->sa_cache_this = cache_reply;
578
579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
580
99fe60d0 581 res->sr_session = session;
dfb4f309 582 res->sr_slot = slot;
fbcd4abc 583 res->sr_renewal_time = jiffies;
2a6e26cd 584 res->sr_status_flags = 0;
fbcd4abc
AA		 585 /*
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
588 */
589 res->sr_status = 1;
ce5039c1
AA		 590 return 0;
591}
dc70d7b3 592EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 593
035168ab 594int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 595 struct nfs4_sequence_args *args,
596 struct nfs4_sequence_res *res,
597 int cache_reply,
598 struct rpc_task *task)
599{
035168ab 600 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 601 int ret = 0;
602
035168ab
TM		 603 if (session == NULL) {
604 args->sa_session = NULL;
605 res->sr_session = NULL;
606 goto out;
607 }
608
12364a4f 609 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 610 __func__, session->clp, session, res->sr_slot ?
611 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 612
035168ab 613 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 614 task);
ce5039c1
AA		 615out:
616 dprintk("<-- %s status=%d\n", __func__, ret);
617 return ret;
618}
619
620struct nfs41_call_sync_data {
035168ab 621 const struct nfs_server *seq_server;
ce5039c1
AA		 622 struct nfs4_sequence_args *seq_args;
623 struct nfs4_sequence_res *seq_res;
624 int cache_reply;
625};
626
627static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
628{
629 struct nfs41_call_sync_data *data = calldata;
630
035168ab
TM		 631 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
632
633 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 634 data->seq_res, data->cache_reply, task))
635 return;
636 rpc_call_start(task);
637}
638
b257957e
AB		 639static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
640{
641 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
642 nfs41_call_sync_prepare(task, calldata);
643}
644
69ab40c4
AA		 645static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
646{
647 struct nfs41_call_sync_data *data = calldata;
648
14516c3a 649 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 650}
651
ce5039c1
AA		 652struct rpc_call_ops nfs41_call_sync_ops = {
653 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 654 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 655};
656
b257957e
AB		 657struct rpc_call_ops nfs41_call_priv_sync_ops = {
658 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
659 .rpc_call_done = nfs41_call_sync_done,
660};
661
7c513058
BS		 662static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
663 struct nfs_server *server,
ce5039c1
AA		 664 struct rpc_message *msg,
665 struct nfs4_sequence_args *args,
666 struct nfs4_sequence_res *res,
b257957e
AB		 667 int cache_reply,
668 int privileged)
ce5039c1
AA		 669{
670 int ret;
671 struct rpc_task *task;
672 struct nfs41_call_sync_data data = {
035168ab 673 .seq_server = server,
ce5039c1
AA		 674 .seq_args = args,
675 .seq_res = res,
676 .cache_reply = cache_reply,
677 };
678 struct rpc_task_setup task_setup = {
7c513058 679 .rpc_client = clnt,
ce5039c1
AA		 680 .rpc_message = msg,
681 .callback_ops = &nfs41_call_sync_ops,
682 .callback_data = &data
683 };
684
dfb4f309 685 res->sr_slot = NULL;
b257957e
AB		 686 if (privileged)
687 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 688 task = rpc_run_task(&task_setup);
689 if (IS_ERR(task))
690 ret = PTR_ERR(task);
691 else {
692 ret = task->tk_status;
693 rpc_put_task(task);
694 }
695 return ret;
696}
697
7c513058
BS		 698int _nfs4_call_sync_session(struct rpc_clnt *clnt,
699 struct nfs_server *server,
cccef3b9
AA		 700 struct rpc_message *msg,
701 struct nfs4_sequence_args *args,
702 struct nfs4_sequence_res *res,
703 int cache_reply)
704{
7c513058 705 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 706}
707
df896455 708#else
14516c3a
TM		 709static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
df896455 711{
14516c3a 712 return 1;
df896455 713}
cccef3b9
AA		 714#endif /* CONFIG_NFS_V4_1 */
715
7c513058
BS		 716int _nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
cccef3b9
AA		 718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
721 int cache_reply)
722{
f3752975 723 args->sa_session = res->sr_session = NULL;
7c513058 724 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 725}
726
e73b83f2 727static inline
7c513058
BS		 728int nfs4_call_sync(struct rpc_clnt *clnt,
729 struct nfs_server *server,
e73b83f2
BS		 730 struct rpc_message *msg,
731 struct nfs4_sequence_args *args,
732 struct nfs4_sequence_res *res,
733 int cache_reply)
734{
7c513058
BS		 735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
736 args, res, cache_reply);
e73b83f2 737}
cccef3b9 738
38478b24 739static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 740{
38478b24 741 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 742
38478b24 743 spin_lock(&dir->i_lock);
40d24704
TM		 744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
745 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 746 nfs_force_lookup_revalidate(dir);
40d24704 747 nfsi->change_attr = cinfo->after;
38478b24 748 spin_unlock(&dir->i_lock);
1da177e4
LT		 749}
750
e56e0b78 751struct nfs4_opendata {
c6d00e63 752 struct kref kref;
e56e0b78
TM		 753 struct nfs_openargs o_arg;
754 struct nfs_openres o_res;
cdd4e68b
TM		 755 struct nfs_open_confirmargs c_arg;
756 struct nfs_open_confirmres c_res;
e56e0b78
TM		 757 struct nfs_fattr f_attr;
758 struct nfs_fattr dir_attr;
ad389da7 759 struct path path;
e56e0b78
TM		 760 struct dentry *dir;
761 struct nfs4_state_owner *owner;
aac00a8d 762 struct nfs4_state *state;
e56e0b78 763 struct iattr attrs;
26e976a8 764 unsigned long timestamp;
3e309914 765 unsigned int rpc_done : 1;
24ac23ab
TM		 766 int rpc_status;
767 int cancelled;
e56e0b78
TM		 768};
769
2ced46c2
TM		 770
771static void nfs4_init_opendata_res(struct nfs4_opendata *p)
772{
773 p->o_res.f_attr = &p->f_attr;
774 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 775 p->o_res.seqid = p->o_arg.seqid;
776 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 777 p->o_res.server = p->o_arg.server;
778 nfs_fattr_init(&p->f_attr);
779 nfs_fattr_init(&p->dir_attr);
780}
781
ad389da7 782static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 783 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 784 const struct iattr *attrs,
785 gfp_t gfp_mask)
e56e0b78 786{
ad389da7 787 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 788 struct inode *dir = parent->d_inode;
789 struct nfs_server *server = NFS_SERVER(dir);
790 struct nfs4_opendata *p;
791
8535b2be 792 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 793 if (p == NULL)
794 goto err;
8535b2be 795 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 796 if (p->o_arg.seqid == NULL)
797 goto err_free;
f6948697
AV		 798 path_get(path);
799 p->path = *path;
e56e0b78
TM		 800 p->dir = parent;
801 p->owner = sp;
802 atomic_inc(&sp->so_count);
803 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 804 p->o_arg.open_flags = flags;
805 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 806 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 807 p->o_arg.id = sp->so_owner_id.id;
ad389da7 808 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 809 p->o_arg.server = server;
810 p->o_arg.bitmask = server->attr_bitmask;
811 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 812 if (flags & O_CREAT) {
813 u32 *s;
814
e56e0b78
TM		 815 p->o_arg.u.attrs = &p->attrs;
816 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 817 s = (u32 *) p->o_arg.u.verifier.data;
818 s[0] = jiffies;
819 s[1] = current->pid;
e56e0b78 820 }
cdd4e68b
TM		 821 p->c_arg.fh = &p->o_res.fh;
822 p->c_arg.stateid = &p->o_res.stateid;
823 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 824 nfs4_init_opendata_res(p);
c6d00e63 825 kref_init(&p->kref);
e56e0b78
TM		 826 return p;
827err_free:
828 kfree(p);
829err:
830 dput(parent);
831 return NULL;
832}
833
c6d00e63 834static void nfs4_opendata_free(struct kref *kref)
e56e0b78 835{
c6d00e63
TM		 836 struct nfs4_opendata *p = container_of(kref,
837 struct nfs4_opendata, kref);
838
839 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 840 if (p->state != NULL)
841 nfs4_put_open_state(p->state);
c6d00e63
TM		 842 nfs4_put_state_owner(p->owner);
843 dput(p->dir);
31f31db1 844 path_put(&p->path);
c6d00e63
TM		 845 kfree(p);
846}
847
848static void nfs4_opendata_put(struct nfs4_opendata *p)
849{
850 if (p != NULL)
851 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 852}
853
06f814a3
TM		 854static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
855{
06f814a3
TM		 856 int ret;
857
06f814a3 858 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 859 return ret;
860}
861
dc0b027d 862static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 863{
864 int ret = 0;
dc0b027d
TM		 865
866 if (open_mode & O_EXCL)
867 goto out;
868 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 869 case FMODE_READ:
88069f77
TM		 870 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
871 && state->n_rdonly != 0;
6ee41268
TM		 872 break;
873 case FMODE_WRITE:
88069f77
TM		 874 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
875 && state->n_wronly != 0;
6ee41268
TM		 876 break;
877 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 878 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
879 && state->n_rdwr != 0;
6ee41268 880 }
dc0b027d 881out:
6ee41268
TM		 882 return ret;
883}
884
dc0b027d 885static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 886{
dc0b027d 887 if ((delegation->type & fmode) != fmode)
aac00a8d 888 return 0;
15c831bf 889 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 890 return 0;
b7391f44 891 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 892 return 1;
893}
894
dc0b027d 895static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 896{
dc0b027d 897 switch (fmode) {
e7616923
TM		 898 case FMODE_WRITE:
899 state->n_wronly++;
900 break;
901 case FMODE_READ:
902 state->n_rdonly++;
903 break;
904 case FMODE_READ|FMODE_WRITE:
905 state->n_rdwr++;
906 }
dc0b027d 907 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 908}
909
dc0b027d 910static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 911{
912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
913 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
914 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 915 switch (fmode) {
003707c7
TM		 916 case FMODE_READ:
917 set_bit(NFS_O_RDONLY_STATE, &state->flags);
918 break;
919 case FMODE_WRITE:
920 set_bit(NFS_O_WRONLY_STATE, &state->flags);
921 break;
922 case FMODE_READ|FMODE_WRITE:
923 set_bit(NFS_O_RDWR_STATE, &state->flags);
924 }
e7616923
TM		 925}
926
dc0b027d 927static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 928{
8bda4e4c 929 write_seqlock(&state->seqlock);
dc0b027d 930 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 931 write_sequnlock(&state->seqlock);
003707c7
TM		 932}
933
dc0b027d 934static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 935{
8bda4e4c
TM		 936 /*
937 * Protect the call to nfs4_state_set_mode_locked and
938 * serialise the stateid update
939 */
940 write_seqlock(&state->seqlock);
003707c7
TM		 941 if (deleg_stateid != NULL) {
942 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
943 set_bit(NFS_DELEGATED_STATE, &state->flags);
944 }
945 if (open_stateid != NULL)
dc0b027d 946 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 947 write_sequnlock(&state->seqlock);
948 spin_lock(&state->owner->so_lock);
dc0b027d 949 update_open_stateflags(state, fmode);
ec073428 950 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 951}
952
dc0b027d 953static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 954{
955 struct nfs_inode *nfsi = NFS_I(state->inode);
956 struct nfs_delegation *deleg_cur;
957 int ret = 0;
958
dc0b027d 959 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 960
961 rcu_read_lock();
962 deleg_cur = rcu_dereference(nfsi->delegation);
963 if (deleg_cur == NULL)
964 goto no_delegation;
965
966 spin_lock(&deleg_cur->lock);
967 if (nfsi->delegation != deleg_cur ||
dc0b027d 968 (deleg_cur->type & fmode) != fmode)
34310430
TM		 969 goto no_delegation_unlock;
970
971 if (delegation == NULL)
972 delegation = &deleg_cur->stateid;
973 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
974 goto no_delegation_unlock;
975
b7391f44 976 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 977 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 978 ret = 1;
979no_delegation_unlock:
980 spin_unlock(&deleg_cur->lock);
981no_delegation:
982 rcu_read_unlock();
983
984 if (!ret && open_stateid != NULL) {
dc0b027d 985 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 986 ret = 1;
987 }
988
989 return ret;
990}
991
992
dc0b027d 993static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 994{
995 struct nfs_delegation *delegation;
996
997 rcu_read_lock();
998 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 999 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1000 rcu_read_unlock();
1001 return;
1002 }
1003 rcu_read_unlock();
1004 nfs_inode_return_delegation(inode);
1005}
1006
6ee41268 1007static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1008{
1009 struct nfs4_state *state = opendata->state;
1010 struct nfs_inode *nfsi = NFS_I(state->inode);
1011 struct nfs_delegation *delegation;
dc0b027d
TM		 1012 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1013 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1014 nfs4_stateid stateid;
1015 int ret = -EAGAIN;
1016
aac00a8d 1017 for (;;) {
dc0b027d 1018 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1019 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1020 if (can_open_cached(state, fmode, open_mode)) {
1021 update_open_stateflags(state, fmode);
6ee41268 1022 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1023 goto out_return_state;
1024 }
1025 spin_unlock(&state->owner->so_lock);
1026 }
34310430
TM		 1027 rcu_read_lock();
1028 delegation = rcu_dereference(nfsi->delegation);
1029 if (delegation == NULL ||
dc0b027d 1030 !can_open_delegated(delegation, fmode)) {
34310430 1031 rcu_read_unlock();
aac00a8d 1032 break;
34310430 1033 }
aac00a8d
TM		 1034 /* Save the delegation */
1035 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1036 rcu_read_unlock();
af22f94a 1037 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1038 if (ret != 0)
1039 goto out;
1040 ret = -EAGAIN;
34310430
TM		 1041
1042 /* Try to update the stateid using the delegation */
dc0b027d 1043 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1044 goto out_return_state;
aac00a8d 1045 }
aac00a8d
TM		 1046out:
1047 return ERR_PTR(ret);
1048out_return_state:
1049 atomic_inc(&state->count);
1050 return state;
1051}
1052
24ac23ab
TM		 1053static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1054{
1055 struct inode *inode;
1056 struct nfs4_state *state = NULL;
003707c7 1057 struct nfs_delegation *delegation;
1b370bc2 1058 int ret;
24ac23ab 1059
aac00a8d 1060 if (!data->rpc_done) {
6ee41268 1061 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1062 goto out;
1063 }
1064
1b370bc2 1065 ret = -EAGAIN;
24ac23ab 1066 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1067 goto err;
24ac23ab 1068 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1069 ret = PTR_ERR(inode);
03f28e3a 1070 if (IS_ERR(inode))
1b370bc2
TM		 1071 goto err;
1072 ret = -ENOMEM;
24ac23ab
TM		 1073 state = nfs4_get_open_state(inode, data->owner);
1074 if (state == NULL)
1b370bc2 1075 goto err_put_inode;
549d6ed5 1076 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1077 int delegation_flags = 0;
1078
003707c7
TM		 1079 rcu_read_lock();
1080 delegation = rcu_dereference(NFS_I(inode)->delegation);
1081 if (delegation)
1082 delegation_flags = delegation->flags;
1083 rcu_read_unlock();
15c831bf 1084 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1085 nfs_inode_set_delegation(state->inode,
1086 data->owner->so_cred,
1087 &data->o_res);
1088 else
1089 nfs_inode_reclaim_delegation(state->inode,
1090 data->owner->so_cred,
1091 &data->o_res);
1092 }
34310430
TM		 1093
1094 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1095 data->o_arg.fmode);
24ac23ab 1096 iput(inode);
aac00a8d 1097out:
24ac23ab 1098 return state;
1b370bc2
TM		 1099err_put_inode:
1100 iput(inode);
1101err:
1102 return ERR_PTR(ret);
24ac23ab
TM		 1103}
1104
864472e9
TM		 1105static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1106{
1107 struct nfs_inode *nfsi = NFS_I(state->inode);
1108 struct nfs_open_context *ctx;
1109
1110 spin_lock(&state->inode->i_lock);
1111 list_for_each_entry(ctx, &nfsi->open_files, list) {
1112 if (ctx->state != state)
1113 continue;
1114 get_nfs_open_context(ctx);
1115 spin_unlock(&state->inode->i_lock);
1116 return ctx;
1117 }
1118 spin_unlock(&state->inode->i_lock);
1119 return ERR_PTR(-ENOENT);
1120}
1121
6f220ed5
TM		 1122static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1123{
1124 struct nfs4_opendata *opendata;
1125
8535b2be 1126 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1127 if (opendata == NULL)
1128 return ERR_PTR(-ENOMEM);
1129 opendata->state = state;
1130 atomic_inc(&state->count);
1131 return opendata;
1132}
1133
dc0b027d 1134static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1135{
2ced46c2 1136 struct nfs4_state *newstate;
864472e9
TM		 1137 int ret;
1138
dc0b027d
TM		 1139 opendata->o_arg.open_flags = 0;
1140 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1141 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1142 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1143 nfs4_init_opendata_res(opendata);
b257957e 1144 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1145 if (ret != 0)
1146 return ret;
2ced46c2 1147 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1148 if (IS_ERR(newstate))
1149 return PTR_ERR(newstate);
dc0b027d 1150 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1151 *res = newstate;
864472e9
TM		 1152 return 0;
1153}
1154
1155static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1156{
864472e9 1157 struct nfs4_state *newstate;
864472e9
TM		 1158 int ret;
1159
1160 /* memory barrier prior to reading state->n_* */
2ced46c2 1161 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1162 smp_rmb();
1163 if (state->n_rdwr != 0) {
b0ed9dbc 1164 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1165 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1166 if (ret != 0)
1167 return ret;
2ced46c2
TM		 1168 if (newstate != state)
1169 return -ESTALE;
864472e9
TM		 1170 }
1171 if (state->n_wronly != 0) {
b0ed9dbc 1172 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1173 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1174 if (ret != 0)
1175 return ret;
2ced46c2
TM		 1176 if (newstate != state)
1177 return -ESTALE;
864472e9
TM		 1178 }
1179 if (state->n_rdonly != 0) {
b0ed9dbc 1180 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1181 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1182 if (ret != 0)
1183 return ret;
2ced46c2
TM		 1184 if (newstate != state)
1185 return -ESTALE;
864472e9 1186 }
1ac7e2fd
TM		 1187 /*
1188 * We may have performed cached opens for all three recoveries.
1189 * Check if we need to update the current stateid.
1190 */
1191 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1192 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1193 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1194 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1195 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1196 write_sequnlock(&state->seqlock);
1ac7e2fd 1197 }
864472e9
TM		 1198 return 0;
1199}
1200
1da177e4
LT		 1201/*
1202 * OPEN_RECLAIM:
1203 * reclaim state on the server after a reboot.
1da177e4 1204 */
539cd03a 1205static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1206{
1ac7e2fd 1207 struct nfs_delegation *delegation;
864472e9 1208 struct nfs4_opendata *opendata;
dc0b027d 1209 fmode_t delegation_type = 0;
1da177e4
LT		 1210 int status;
1211
6f220ed5
TM		 1212 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1213 if (IS_ERR(opendata))
1214 return PTR_ERR(opendata);
864472e9
TM		 1215 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1216 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1217 rcu_read_lock();
1218 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1219 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1220 delegation_type = delegation->type;
1ac7e2fd 1221 rcu_read_unlock();
864472e9
TM		 1222 opendata->o_arg.u.delegation_type = delegation_type;
1223 status = nfs4_open_recover(opendata, state);
c6d00e63 1224 nfs4_opendata_put(opendata);
1da177e4
LT		 1225 return status;
1226}
1227
539cd03a 1228static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1229{
1230 struct nfs_server *server = NFS_SERVER(state->inode);
1231 struct nfs4_exception exception = { };
1232 int err;
1233 do {
539cd03a 1234 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1235 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1236 break;
1237 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1238 } while (exception.retry);
1239 return err;
1240}
1241
864472e9
TM		 1242static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1243{
1244 struct nfs_open_context *ctx;
1245 int ret;
1246
1247 ctx = nfs4_state_find_open_context(state);
1248 if (IS_ERR(ctx))
1249 return PTR_ERR(ctx);
539cd03a 1250 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1251 put_nfs_open_context(ctx);
1252 return ret;
1253}
1254
13437e12 1255static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1256{
e56e0b78 1257 struct nfs4_opendata *opendata;
864472e9 1258 int ret;
1da177e4 1259
6f220ed5
TM		 1260 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1261 if (IS_ERR(opendata))
1262 return PTR_ERR(opendata);
e56e0b78 1263 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1264 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1265 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1266 ret = nfs4_open_recover(opendata, state);
c6d00e63 1267 nfs4_opendata_put(opendata);
864472e9 1268 return ret;
1da177e4
LT		 1269}
1270
13437e12 1271int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1272{
1273 struct nfs4_exception exception = { };
539cd03a 1274 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1275 int err;
1276 do {
13437e12 1277 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1278 switch (err) {
1279 case 0:
965b5d67
TM		 1280 case -ENOENT:
1281 case -ESTALE:
1282 goto out;
bcfa49f6
RL		 1283 case -NFS4ERR_BADSESSION:
1284 case -NFS4ERR_BADSLOT:
1285 case -NFS4ERR_BAD_HIGH_SLOT:
1286 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1287 case -NFS4ERR_DEADSESSION:
0400a6b0 1288 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1289 goto out;
1da177e4
LT		 1290 case -NFS4ERR_STALE_CLIENTID:
1291 case -NFS4ERR_STALE_STATEID:
1292 case -NFS4ERR_EXPIRED:
1293 /* Don't recall a delegation if it was lost */
0400a6b0 1294 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1295 goto out;
1296 case -ERESTARTSYS:
1297 /*
1298 * The show must go on: exit, but mark the
1299 * stateid as needing recovery.
1300 */
1301 case -NFS4ERR_ADMIN_REVOKED:
1302 case -NFS4ERR_BAD_STATEID:
0400a6b0 1303 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1304 case -EKEYEXPIRED:
1305 /*
1306 * User RPCSEC_GSS context has expired.
1307 * We cannot recover this stateid now, so
1308 * skip it and allow recovery thread to
1309 * proceed.
1310 */
965b5d67
TM		 1311 case -ENOMEM:
1312 err = 0;
1313 goto out;
1da177e4
LT		 1314 }
1315 err = nfs4_handle_exception(server, err, &exception);
1316 } while (exception.retry);
965b5d67 1317out:
1da177e4
LT		 1318 return err;
1319}
1320
cdd4e68b
TM		 1321static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1322{
1323 struct nfs4_opendata *data = calldata;
1324
1325 data->rpc_status = task->tk_status;
26e976a8 1326 if (data->rpc_status == 0) {
cdd4e68b
TM		 1327 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1328 sizeof(data->o_res.stateid.data));
bb22629e 1329 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1330 renew_lease(data->o_res.server, data->timestamp);
3e309914 1331 data->rpc_done = 1;
26e976a8 1332 }
cdd4e68b
TM		 1333}
1334
1335static void nfs4_open_confirm_release(void *calldata)
1336{
1337 struct nfs4_opendata *data = calldata;
1338 struct nfs4_state *state = NULL;
1339
1340 /* If this request hasn't been cancelled, do nothing */
1341 if (data->cancelled == 0)
1342 goto out_free;
1343 /* In case of error, no cleanup! */
3e309914 1344 if (!data->rpc_done)
cdd4e68b 1345 goto out_free;
cdd4e68b 1346 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1347 if (!IS_ERR(state))
dc0b027d 1348 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1349out_free:
c6d00e63 1350 nfs4_opendata_put(data);
cdd4e68b
TM		 1351}
1352
1353static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1354 .rpc_call_done = nfs4_open_confirm_done,
1355 .rpc_release = nfs4_open_confirm_release,
1356};
1357
1358/*
1359 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1360 */
1361static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1362{
1363 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1364 struct rpc_task *task;
5138fde0
TM		 1365 struct rpc_message msg = {
1366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1367 .rpc_argp = &data->c_arg,
1368 .rpc_resp = &data->c_res,
1369 .rpc_cred = data->owner->so_cred,
1370 };
c970aa85
TM		 1371 struct rpc_task_setup task_setup_data = {
1372 .rpc_client = server->client,
5138fde0 1373 .rpc_message = &msg,
c970aa85
TM		 1374 .callback_ops = &nfs4_open_confirm_ops,
1375 .callback_data = data,
101070ca 1376 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1377 .flags = RPC_TASK_ASYNC,
1378 };
1da177e4
LT		 1379 int status;
1380
c6d00e63 1381 kref_get(&data->kref);
3e309914
TM		 1382 data->rpc_done = 0;
1383 data->rpc_status = 0;
5138fde0 1384 data->timestamp = jiffies;
c970aa85 1385 task = rpc_run_task(&task_setup_data);
7a1218a2 1386 if (IS_ERR(task))
cdd4e68b 1387 return PTR_ERR(task);
cdd4e68b
TM		 1388 status = nfs4_wait_for_completion_rpc_task(task);
1389 if (status != 0) {
1390 data->cancelled = 1;
1391 smp_wmb();
1392 } else
1393 status = data->rpc_status;
e6b3c4db 1394 rpc_put_task(task);
1da177e4
LT		 1395 return status;
1396}
1397
24ac23ab 1398static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1399{
24ac23ab
TM		 1400 struct nfs4_opendata *data = calldata;
1401 struct nfs4_state_owner *sp = data->owner;
5138fde0 1402
24ac23ab
TM		 1403 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1404 return;
aac00a8d
TM		 1405 /*
1406 * Check if we still need to send an OPEN call, or if we can use
1407 * a delegation instead.
1408 */
1409 if (data->state != NULL) {
1410 struct nfs_delegation *delegation;
1411
dc0b027d 1412 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1413 goto out_no_action;
aac00a8d
TM		 1414 rcu_read_lock();
1415 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1416 if (delegation != NULL &&
15c831bf 1417 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1418 rcu_read_unlock();
6ee41268 1419 goto out_no_action;
aac00a8d
TM		 1420 }
1421 rcu_read_unlock();
1422 }
24ac23ab 1423 /* Update sequence id. */
9f958ab8 1424 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1425 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1426 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1427 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1428 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1429 }
26e976a8 1430 data->timestamp = jiffies;
035168ab 1431 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1432 &data->o_arg.seq_args,
1433 &data->o_res.seq_res, 1, task))
1434 return;
5138fde0 1435 rpc_call_start(task);
6ee41268
TM		 1436 return;
1437out_no_action:
1438 task->tk_action = NULL;
1439
24ac23ab 1440}
1da177e4 1441
b257957e
AB		 1442static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1443{
1444 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1445 nfs4_open_prepare(task, calldata);
1446}
1447
24ac23ab
TM		 1448static void nfs4_open_done(struct rpc_task *task, void *calldata)
1449{
1450 struct nfs4_opendata *data = calldata;
1da177e4 1451
24ac23ab 1452 data->rpc_status = task->tk_status;
d898528c 1453
14516c3a
TM		 1454 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1455 return;
d898528c 1456
24ac23ab
TM		 1457 if (task->tk_status == 0) {
1458 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1459 case S_IFREG:
1460 break;
1461 case S_IFLNK:
24ac23ab 1462 data->rpc_status = -ELOOP;
6f926b5b
TM		 1463 break;
1464 case S_IFDIR:
24ac23ab 1465 data->rpc_status = -EISDIR;
6f926b5b
TM		 1466 break;
1467 default:
24ac23ab 1468 data->rpc_status = -ENOTDIR;
6f926b5b 1469 }
26e976a8 1470 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1471 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1472 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1473 }
3e309914 1474 data->rpc_done = 1;
24ac23ab 1475}
6f926b5b 1476
24ac23ab
TM		 1477static void nfs4_open_release(void *calldata)
1478{
1479 struct nfs4_opendata *data = calldata;
1480 struct nfs4_state *state = NULL;
1481
1482 /* If this request hasn't been cancelled, do nothing */
1483 if (data->cancelled == 0)
1484 goto out_free;
1485 /* In case of error, no cleanup! */
3e309914 1486 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1487 goto out_free;
1488 /* In case we need an open_confirm, no cleanup! */
1489 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1490 goto out_free;
24ac23ab 1491 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1492 if (!IS_ERR(state))
dc0b027d 1493 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1494out_free:
c6d00e63 1495 nfs4_opendata_put(data);
24ac23ab
TM		 1496}
1497
1498static const struct rpc_call_ops nfs4_open_ops = {
1499 .rpc_call_prepare = nfs4_open_prepare,
1500 .rpc_call_done = nfs4_open_done,
1501 .rpc_release = nfs4_open_release,
1502};
1503
b257957e
AB		 1504static const struct rpc_call_ops nfs4_recover_open_ops = {
1505 .rpc_call_prepare = nfs4_recover_open_prepare,
1506 .rpc_call_done = nfs4_open_done,
1507 .rpc_release = nfs4_open_release,
1508};
1509
1510static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1511{
1512 struct inode *dir = data->dir->d_inode;
1513 struct nfs_server *server = NFS_SERVER(dir);
1514 struct nfs_openargs *o_arg = &data->o_arg;
1515 struct nfs_openres *o_res = &data->o_res;
1516 struct rpc_task *task;
5138fde0
TM		 1517 struct rpc_message msg = {
1518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1519 .rpc_argp = o_arg,
1520 .rpc_resp = o_res,
1521 .rpc_cred = data->owner->so_cred,
1522 };
c970aa85
TM		 1523 struct rpc_task_setup task_setup_data = {
1524 .rpc_client = server->client,
5138fde0 1525 .rpc_message = &msg,
c970aa85
TM		 1526 .callback_ops = &nfs4_open_ops,
1527 .callback_data = data,
101070ca 1528 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1529 .flags = RPC_TASK_ASYNC,
1530 };
24ac23ab
TM		 1531 int status;
1532
c6d00e63 1533 kref_get(&data->kref);
3e309914
TM		 1534 data->rpc_done = 0;
1535 data->rpc_status = 0;
2ced46c2 1536 data->cancelled = 0;
b257957e
AB		 1537 if (isrecover)
1538 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1539 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1540 if (IS_ERR(task))
1541 return PTR_ERR(task);
1542 status = nfs4_wait_for_completion_rpc_task(task);
1543 if (status != 0) {
1544 data->cancelled = 1;
1545 smp_wmb();
1546 } else
1547 status = data->rpc_status;
1548 rpc_put_task(task);
1549
1550 return status;
1551}
1552
1553static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1554{
1555 struct inode *dir = data->dir->d_inode;
1556 struct nfs_openres *o_res = &data->o_res;
1557 int status;
1558
1559 status = nfs4_run_open_task(data, 1);
1560 if (status != 0 || !data->rpc_done)
1561 return status;
1562
1563 nfs_refresh_inode(dir, o_res->dir_attr);
1564
1565 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1566 status = _nfs4_proc_open_confirm(data);
1567 if (status != 0)
1568 return status;
1569 }
1570
1571 return status;
1572}
1573
1574/*
1575 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1576 */
1577static int _nfs4_proc_open(struct nfs4_opendata *data)
1578{
1579 struct inode *dir = data->dir->d_inode;
1580 struct nfs_server *server = NFS_SERVER(dir);
1581 struct nfs_openargs *o_arg = &data->o_arg;
1582 struct nfs_openres *o_res = &data->o_res;
1583 int status;
1584
1585 status = nfs4_run_open_task(data, 0);
3e309914 1586 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1587 return status;
1588
56ae19f3
TM		 1589 if (o_arg->open_flags & O_CREAT) {
1590 update_changeattr(dir, &o_res->cinfo);
1591 nfs_post_op_update_inode(dir, o_res->dir_attr);
1592 } else
1593 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1594 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1595 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1596 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1597 status = _nfs4_proc_open_confirm(data);
1da177e4 1598 if (status != 0)
24ac23ab 1599 return status;
1da177e4
LT		 1600 }
1601 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1602 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1603 return 0;
1da177e4
LT		 1604}
1605
d83217c1 1606static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1607{
a78cb57a 1608 unsigned int loop;
6b30954e 1609 int ret;
58d9714a 1610
a78cb57a 1611 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1612 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1613 if (ret != 0)
a78cb57a 1614 break;
e598d843
TM		 1615 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1616 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1617 break;
0400a6b0 1618 nfs4_schedule_state_manager(clp);
a78cb57a 1619 ret = -EIO;
6b30954e 1620 }
a78cb57a 1621 return ret;
58d9714a
TM		 1622}
1623
d83217c1
AA		 1624static int nfs4_recover_expired_lease(struct nfs_server *server)
1625{
1626 return nfs4_client_recover_expired_lease(server->nfs_client);
1627}
1628
1da177e4
LT		 1629/*
1630 * OPEN_EXPIRED:
1631 * reclaim state on the server after a network partition.
1632 * Assumes caller holds the appropriate lock
1633 */
539cd03a 1634static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1635{
e56e0b78 1636 struct nfs4_opendata *opendata;
864472e9 1637 int ret;
1da177e4 1638
6f220ed5
TM		 1639 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1640 if (IS_ERR(opendata))
1641 return PTR_ERR(opendata);
864472e9 1642 ret = nfs4_open_recover(opendata, state);
35d05778 1643 if (ret == -ESTALE)
539cd03a 1644 d_drop(ctx->path.dentry);
c6d00e63 1645 nfs4_opendata_put(opendata);
864472e9 1646 return ret;
1da177e4
LT		 1647}
1648
a9ed2e25 1649static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1650{
539cd03a 1651 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1652 struct nfs4_exception exception = { };
1653 int err;
1654
1655 do {
539cd03a 1656 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1657 switch (err) {
1658 default:
1659 goto out;
1660 case -NFS4ERR_GRACE:
1661 case -NFS4ERR_DELAY:
1662 nfs4_handle_exception(server, err, &exception);
1663 err = 0;
1664 }
202b50dc 1665 } while (exception.retry);
a9ed2e25 1666out:
202b50dc
TM		 1667 return err;
1668}
1669
1da177e4
LT		 1670static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1671{
1da177e4 1672 struct nfs_open_context *ctx;
864472e9 1673 int ret;
1da177e4 1674
864472e9
TM		 1675 ctx = nfs4_state_find_open_context(state);
1676 if (IS_ERR(ctx))
1677 return PTR_ERR(ctx);
539cd03a 1678 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1679 put_nfs_open_context(ctx);
1680 return ret;
1da177e4
LT		 1681}
1682
aa53ed54
JL		 1683/*
1684 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1685 * fields corresponding to attributes that were used to store the verifier.
1686 * Make sure we clobber those fields in the later setattr call
1687 */
1688static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1689{
1690 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1691 !(sattr->ia_valid & ATTR_ATIME_SET))
1692 sattr->ia_valid |= ATTR_ATIME;
1693
1694 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1695 !(sattr->ia_valid & ATTR_MTIME_SET))
1696 sattr->ia_valid |= ATTR_MTIME;
1697}
1698
1da177e4 1699/*
24ac23ab 1700 * Returns a referenced nfs4_state
1da177e4 1701 */
dc0b027d 1702static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1703{
1704 struct nfs4_state_owner *sp;
1705 struct nfs4_state *state = NULL;
1706 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1707 struct nfs4_opendata *opendata;
aac00a8d 1708 int status;
1da177e4
LT		 1709
1710 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1711 status = -ENOMEM;
1712 if (!(sp = nfs4_get_state_owner(server, cred))) {
1713 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1714 goto out_err;
1715 }
58d9714a
TM		 1716 status = nfs4_recover_expired_lease(server);
1717 if (status != 0)
b4454fe1 1718 goto err_put_state_owner;
aac00a8d 1719 if (path->dentry->d_inode != NULL)
dc0b027d 1720 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1721 status = -ENOMEM;
8535b2be 1722 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1723 if (opendata == NULL)
95d35cb4 1724 goto err_put_state_owner;
1da177e4 1725
aac00a8d
TM		 1726 if (path->dentry->d_inode != NULL)
1727 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1728
24ac23ab 1729 status = _nfs4_proc_open(opendata);
1da177e4 1730 if (status != 0)
c6d00e63 1731 goto err_opendata_put;
1da177e4 1732
24ac23ab 1733 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1734 status = PTR_ERR(state);
1735 if (IS_ERR(state))
c6d00e63 1736 goto err_opendata_put;
0df5dd4a 1737 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1738 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1739
1740 if (opendata->o_arg.open_flags & O_EXCL) {
1741 nfs4_exclusive_attrset(opendata, sattr);
1742
1743 nfs_fattr_init(opendata->o_res.f_attr);
1744 status = nfs4_do_setattr(state->inode, cred,
1745 opendata->o_res.f_attr, sattr,
1746 state);
1747 if (status == 0)
1748 nfs_setattr_update_inode(state->inode, sattr);
1749 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1750 }
c6d00e63 1751 nfs4_opendata_put(opendata);
1da177e4 1752 nfs4_put_state_owner(sp);
1da177e4
LT		 1753 *res = state;
1754 return 0;
c6d00e63
TM		 1755err_opendata_put:
1756 nfs4_opendata_put(opendata);
e56e0b78
TM		 1757err_put_state_owner:
1758 nfs4_put_state_owner(sp);
1da177e4 1759out_err:
1da177e4
LT		 1760 *res = NULL;
1761 return status;
1762}
1763
1764
dc0b027d 1765static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1766{
1767 struct nfs4_exception exception = { };
1768 struct nfs4_state *res;
1769 int status;
1770
1771 do {
dc0b027d 1772 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1773 if (status == 0)
1774 break;
1775 /* NOTE: BAD_SEQID means the server and client disagree about the
1776 * book-keeping w.r.t. state-changing operations
1777 * (OPEN/CLOSE/LOCK/LOCKU...)
1778 * It is actually a sign of a bug on the client or on the server.
1779 *
1780 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1781 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1782 * have unhashed the old state_owner for us, and that we can
1783 * therefore safely retry using a new one. We should still warn
1784 * the user though...
1785 */
1786 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1787 printk(KERN_WARNING "NFS: v4 server %s "
1788 " returned a bad sequence-id error!\n",
1789 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1790 exception.retry = 1;
1791 continue;
1792 }
550f5747
TM		 1793 /*
1794 * BAD_STATEID on OPEN means that the server cancelled our
1795 * state before it received the OPEN_CONFIRM.
1796 * Recover by retrying the request as per the discussion
1797 * on Page 181 of RFC3530.
1798 */
1799 if (status == -NFS4ERR_BAD_STATEID) {
1800 exception.retry = 1;
1801 continue;
1802 }
aac00a8d
TM		 1803 if (status == -EAGAIN) {
1804 /* We must have found a delegation */
1805 exception.retry = 1;
1806 continue;
1807 }
1da177e4
LT		 1808 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1809 status, &exception));
1810 } while (exception.retry);
1811 return res;
1812}
1813
659bfcd6
TM		 1814static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1815 struct nfs_fattr *fattr, struct iattr *sattr,
1816 struct nfs4_state *state)
1da177e4 1817{
3e4f6290 1818 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1819 struct nfs_setattrargs arg = {
3e4f6290 1820 .fh = NFS_FH(inode),
1da177e4
LT		 1821 .iap = sattr,
1822 .server = server,
1823 .bitmask = server->attr_bitmask,
1824 };
1825 struct nfs_setattrres res = {
1826 .fattr = fattr,
1827 .server = server,
1828 };
1829 struct rpc_message msg = {
659bfcd6
TM		 1830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1831 .rpc_argp = &arg,
1832 .rpc_resp = &res,
1833 .rpc_cred = cred,
1da177e4 1834 };
26e976a8 1835 unsigned long timestamp = jiffies;
65e4308d 1836 int status;
1da177e4 1837
0e574af1 1838 nfs_fattr_init(fattr);
1da177e4 1839
3e4f6290
TM		 1840 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1841 /* Use that stateid */
1842 } else if (state != NULL) {
77041ed9 1843 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1844 } else
1da177e4
LT		 1845 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1846
7c513058 1847 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1848 if (status == 0 && state != NULL)
1849 renew_lease(server, timestamp);
65e4308d 1850 return status;
1da177e4
LT		 1851}
1852
659bfcd6
TM		 1853static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1854 struct nfs_fattr *fattr, struct iattr *sattr,
1855 struct nfs4_state *state)
1da177e4 1856{
3e4f6290 1857 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1858 struct nfs4_exception exception = { };
1859 int err;
1860 do {
1861 err = nfs4_handle_exception(server,
659bfcd6 1862 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1863 &exception);
1864 } while (exception.retry);
1865 return err;
1866}
1867
1868struct nfs4_closedata {
4a35bd41 1869 struct path path;
1da177e4
LT		 1870 struct inode *inode;
1871 struct nfs4_state *state;
1872 struct nfs_closeargs arg;
1873 struct nfs_closeres res;
516a6af6 1874 struct nfs_fattr fattr;
26e976a8 1875 unsigned long timestamp;
f7e8917a
FI		 1876 bool roc;
1877 u32 roc_barrier;
1da177e4
LT		 1878};
1879
963d8fe5 1880static void nfs4_free_closedata(void *data)
9512135d 1881{
963d8fe5
TM		 1882 struct nfs4_closedata *calldata = data;
1883 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1884
f7e8917a
FI		 1885 if (calldata->roc)
1886 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1887 nfs4_put_open_state(calldata->state);
1888 nfs_free_seqid(calldata->arg.seqid);
9512135d 1889 nfs4_put_state_owner(sp);
31f31db1 1890 path_put(&calldata->path);
9512135d
TM		 1891 kfree(calldata);
1892}
1893
88069f77
TM		 1894static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1895 fmode_t fmode)
1896{
1897 spin_lock(&state->owner->so_lock);
1898 if (!(fmode & FMODE_READ))
1899 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1900 if (!(fmode & FMODE_WRITE))
1901 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1902 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1903 spin_unlock(&state->owner->so_lock);
1904}
1905
963d8fe5 1906static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1907{
963d8fe5 1908 struct nfs4_closedata *calldata = data;
1da177e4 1909 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1910 struct nfs_server *server = NFS_SERVER(calldata->inode);
1911
14516c3a
TM		 1912 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1913 return;
1da177e4
LT		 1914 /* hmm. we are done with the inode, and in the process of freeing
1915 * the state_owner. we keep this around to process errors
1916 */
1da177e4
LT		 1917 switch (task->tk_status) {
1918 case 0:
f7e8917a
FI		 1919 if (calldata->roc)
1920 pnfs_roc_set_barrier(state->inode,
1921 calldata->roc_barrier);
45328c35 1922 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1923 renew_lease(server, calldata->timestamp);
88069f77
TM		 1924 nfs4_close_clear_stateid_flags(state,
1925 calldata->arg.fmode);
1da177e4
LT		 1926 break;
1927 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1928 case -NFS4ERR_OLD_STATEID:
1929 case -NFS4ERR_BAD_STATEID:
1da177e4 1930 case -NFS4ERR_EXPIRED:
dc0b027d 1931 if (calldata->arg.fmode == 0)
9e33bed5 1932 break;
1da177e4 1933 default:
72211dbe
TM		 1934 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1935 rpc_restart_call_prepare(task);
1da177e4 1936 }
72211dbe 1937 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1938 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1939}
1940
4ce70ada 1941static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1942{
4ce70ada 1943 struct nfs4_closedata *calldata = data;
9512135d 1944 struct nfs4_state *state = calldata->state;
88069f77 1945 int call_close = 0;
9512135d 1946
963d8fe5 1947 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1948 return;
003707c7 1949
88069f77
TM		 1950 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1951 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1952 spin_lock(&state->owner->so_lock);
003707c7 1953 /* Calculate the change in open mode */
e7616923 1954 if (state->n_rdwr == 0) {
003707c7 1955 if (state->n_rdonly == 0) {
88069f77
TM		 1956 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1957 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1958 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1959 }
1960 if (state->n_wronly == 0) {
88069f77
TM		 1961 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1962 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1963 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1964 }
e7616923 1965 }
4cecb76f 1966 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1967
1968 if (!call_close) {
963d8fe5
TM		 1969 /* Note: exit _without_ calling nfs4_close_done */
1970 task->tk_action = NULL;
9512135d
TM		 1971 return;
1972 }
88069f77 1973
f7e8917a 1974 if (calldata->arg.fmode == 0) {
88069f77 1975 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1976 if (calldata->roc &&
1977 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1978 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1979 task, NULL);
1980 return;
1981 }
1982 }
88069f77 1983
516a6af6 1984 nfs_fattr_init(calldata->res.fattr);
26e976a8 1985 calldata->timestamp = jiffies;
035168ab 1986 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1987 &calldata->arg.seq_args, &calldata->res.seq_res,
1988 1, task))
1989 return;
5138fde0 1990 rpc_call_start(task);
1da177e4
LT		 1991}
1992
963d8fe5 1993static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1994 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1995 .rpc_call_done = nfs4_close_done,
1996 .rpc_release = nfs4_free_closedata,
1997};
1998
1da177e4
LT		 1999/*
2000 * It is possible for data to be read/written from a mem-mapped file
2001 * after the sys_close call (which hits the vfs layer as a flush).
2002 * This means that we can't safely call nfsv4 close on a file until
2003 * the inode is cleared. This in turn means that we are not good
2004 * NFSv4 citizens - we do not indicate to the server to update the file's
2005 * share state even when we are done with one of the three share
2006 * stateid's in the inode.
2007 *
2008 * NOTE: Caller must be holding the sp->so_owner semaphore!
2009 */
f7e8917a 2010int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2011{
4a35bd41 2012 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2013 struct nfs4_closedata *calldata;
b39e625b
TM		 2014 struct nfs4_state_owner *sp = state->owner;
2015 struct rpc_task *task;
5138fde0
TM		 2016 struct rpc_message msg = {
2017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2018 .rpc_cred = state->owner->so_cred,
2019 };
c970aa85
TM		 2020 struct rpc_task_setup task_setup_data = {
2021 .rpc_client = server->client,
5138fde0 2022 .rpc_message = &msg,
c970aa85 2023 .callback_ops = &nfs4_close_ops,
101070ca 2024 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2025 .flags = RPC_TASK_ASYNC,
2026 };
9512135d 2027 int status = -ENOMEM;
1da177e4 2028
8535b2be 2029 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2030 if (calldata == NULL)
9512135d 2031 goto out;
4a35bd41 2032 calldata->inode = state->inode;
1da177e4 2033 calldata->state = state;
4a35bd41 2034 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2035 calldata->arg.stateid = &state->open_stateid;
1da177e4 2036 /* Serialization for the sequence id */
8535b2be 2037 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2038 if (calldata->arg.seqid == NULL)
2039 goto out_free_calldata;
dc0b027d 2040 calldata->arg.fmode = 0;
a65318bf 2041 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2042 calldata->res.fattr = &calldata->fattr;
c1d51931 2043 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2044 calldata->res.server = server;
f7e8917a 2045 calldata->roc = roc;
f6948697
AV		 2046 path_get(path);
2047 calldata->path = *path;
9512135d 2048
1174dd1f
TM		 2049 msg.rpc_argp = &calldata->arg;
2050 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2051 task_setup_data.callback_data = calldata;
2052 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2053 if (IS_ERR(task))
2054 return PTR_ERR(task);
a49c3c77
TM		 2055 status = 0;
2056 if (wait)
2057 status = rpc_wait_for_completion_task(task);
b39e625b 2058 rpc_put_task(task);
a49c3c77 2059 return status;
9512135d
TM		 2060out_free_calldata:
2061 kfree(calldata);
2062out:
f7e8917a
FI		 2063 if (roc)
2064 pnfs_roc_release(state->inode);
b39e625b
TM		 2065 nfs4_put_open_state(state);
2066 nfs4_put_state_owner(sp);
9512135d 2067 return status;
1da177e4
LT		 2068}
2069
2b484297 2070static struct inode *
cd9a1c0e 2071nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2072{
1da177e4 2073 struct nfs4_state *state;
1da177e4 2074
565277f6 2075 /* Protect against concurrent sillydeletes */
cd9a1c0e 2076 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2077 if (IS_ERR(state))
2078 return ERR_CAST(state);
cd9a1c0e 2079 ctx->state = state;
f46e0bd3 2080 return igrab(state->inode);
1da177e4
LT		 2081}
2082
1185a552 2083static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2084{
2085 if (ctx->state == NULL)
2086 return;
2087 if (is_sync)
2088 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2089 else
2090 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2091}
1da177e4
LT		 2092
2093static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2094{
43652ad5
BH		 2095 struct nfs4_server_caps_arg args = {
2096 .fhandle = fhandle,
2097 };
1da177e4
LT		 2098 struct nfs4_server_caps_res res = {};
2099 struct rpc_message msg = {
2100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2101 .rpc_argp = &args,
1da177e4
LT		 2102 .rpc_resp = &res,
2103 };
2104 int status;
2105
7c513058 2106 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2107 if (status == 0) {
2108 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2109 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2110 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2111 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2112 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2113 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2114 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2115 server->caps |= NFS_CAP_ACLS;
2116 if (res.has_links != 0)
2117 server->caps |= NFS_CAP_HARDLINKS;
2118 if (res.has_symlinks != 0)
2119 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2120 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2121 server->caps |= NFS_CAP_FILEID;
2122 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2123 server->caps |= NFS_CAP_MODE;
2124 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2125 server->caps |= NFS_CAP_NLINK;
2126 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2127 server->caps |= NFS_CAP_OWNER;
2128 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2129 server->caps |= NFS_CAP_OWNER_GROUP;
2130 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2131 server->caps |= NFS_CAP_ATIME;
2132 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2133 server->caps |= NFS_CAP_CTIME;
2134 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2135 server->caps |= NFS_CAP_MTIME;
2136
a65318bf
TM		 2137 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2138 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2139 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2140 server->acl_bitmask = res.acl_bitmask;
2141 }
cccef3b9 2142
1da177e4
LT		 2143 return status;
2144}
2145
55a97593 2146int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2147{
2148 struct nfs4_exception exception = { };
2149 int err;
2150 do {
2151 err = nfs4_handle_exception(server,
2152 _nfs4_server_capabilities(server, fhandle),
2153 &exception);
2154 } while (exception.retry);
2155 return err;
2156}
2157
2158static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2159 struct nfs_fsinfo *info)
2160{
1da177e4
LT		 2161 struct nfs4_lookup_root_arg args = {
2162 .bitmask = nfs4_fattr_bitmap,
2163 };
2164 struct nfs4_lookup_res res = {
2165 .server = server,
0e574af1 2166 .fattr = info->fattr,
1da177e4
LT		 2167 .fh = fhandle,
2168 };
2169 struct rpc_message msg = {
2170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2171 .rpc_argp = &args,
2172 .rpc_resp = &res,
2173 };
008f55d0 2174
0e574af1 2175 nfs_fattr_init(info->fattr);
7c513058 2176 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2177}
2178
2179static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2180 struct nfs_fsinfo *info)
2181{
2182 struct nfs4_exception exception = { };
2183 int err;
2184 do {
2185 err = nfs4_handle_exception(server,
2186 _nfs4_lookup_root(server, fhandle, info),
2187 &exception);
2188 } while (exception.retry);
2189 return err;
2190}
2191
54ceac45
DH		 2192/*
2193 * get the file handle for the "/" directory on the server
2194 */
1da177e4 2195static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2196 struct nfs_fsinfo *info)
1da177e4 2197{
1da177e4
LT		 2198 int status;
2199
1da177e4 2200 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2201 if (status == 0)
2202 status = nfs4_server_capabilities(server, fhandle);
2203 if (status == 0)
2204 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2205 return nfs4_map_errors(status);
1da177e4
LT		 2206}
2207
6b97fd3d
MN		 2208/*
2209 * Get locations and (maybe) other attributes of a referral.
2210 * Note that we'll actually follow the referral later when
2211 * we detect fsid mismatch in inode revalidation
2212 */
56659e99 2213static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2214{
2215 int status = -ENOMEM;
2216 struct page *page = NULL;
2217 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2218
2219 page = alloc_page(GFP_KERNEL);
2220 if (page == NULL)
2221 goto out;
2222 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2223 if (locations == NULL)
2224 goto out;
2225
c228fd3a 2226 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2227 if (status != 0)
2228 goto out;
2229 /* Make sure server returned a different fsid for the referral */
2230 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2231 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2232 status = -EIO;
2233 goto out;
2234 }
2235
2236 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2237 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2238 if (!fattr->mode)
2239 fattr->mode = S_IFDIR;
2240 memset(fhandle, 0, sizeof(struct nfs_fh));
2241out:
2242 if (page)
2243 __free_page(page);
5d7ca35a 2244 kfree(locations);
6b97fd3d
MN		 2245 return status;
2246}
2247
1da177e4
LT		 2248static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2249{
2250 struct nfs4_getattr_arg args = {
2251 .fh = fhandle,
2252 .bitmask = server->attr_bitmask,
2253 };
2254 struct nfs4_getattr_res res = {
2255 .fattr = fattr,
2256 .server = server,
2257 };
2258 struct rpc_message msg = {
2259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2260 .rpc_argp = &args,
2261 .rpc_resp = &res,
2262 };
2263
0e574af1 2264 nfs_fattr_init(fattr);
7c513058 2265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2266}
2267
2268static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2269{
2270 struct nfs4_exception exception = { };
2271 int err;
2272 do {
2273 err = nfs4_handle_exception(server,
2274 _nfs4_proc_getattr(server, fhandle, fattr),
2275 &exception);
2276 } while (exception.retry);
2277 return err;
2278}
2279
2280/*
2281 * The file is not closed if it is opened due to the a request to change
2282 * the size of the file. The open call will not be needed once the
2283 * VFS layer lookup-intents are implemented.
2284 *
2285 * Close is called when the inode is destroyed.
2286 * If we haven't opened the file for O_WRONLY, we
2287 * need to in the size_change case to obtain a stateid.
2288 *
2289 * Got race?
2290 * Because OPEN is always done by name in nfsv4, it is
2291 * possible that we opened a different file by the same
2292 * name. We can recognize this race condition, but we
2293 * can't do anything about it besides returning an error.
2294 *
2295 * This will be fixed with VFS changes (lookup-intent).
2296 */
2297static int
2298nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2299 struct iattr *sattr)
2300{
08e9eac4 2301 struct inode *inode = dentry->d_inode;
659bfcd6 2302 struct rpc_cred *cred = NULL;
d530838b 2303 struct nfs4_state *state = NULL;
1da177e4
LT		 2304 int status;
2305
0e574af1 2306 nfs_fattr_init(fattr);
1da177e4 2307
d530838b 2308 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2309 if (sattr->ia_valid & ATTR_FILE) {
2310 struct nfs_open_context *ctx;
2311
2312 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2313 if (ctx) {
2314 cred = ctx->cred;
2315 state = ctx->state;
2316 }
659bfcd6 2317 }
08e9eac4 2318
659bfcd6 2319 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2320 if (status == 0)
2321 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2322 return status;
2323}
2324
7c513058
BS		 2325static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2326 const struct nfs_fh *dirfh, const struct qstr *name,
2327 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2328{
2329 int status;
2330 struct nfs4_lookup_arg args = {
2331 .bitmask = server->attr_bitmask,
2332 .dir_fh = dirfh,
2333 .name = name,
2334 };
2335 struct nfs4_lookup_res res = {
2336 .server = server,
2337 .fattr = fattr,
2338 .fh = fhandle,
2339 };
2340 struct rpc_message msg = {
2341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2342 .rpc_argp = &args,
2343 .rpc_resp = &res,
2344 };
2345
2346 nfs_fattr_init(fattr);
2347
2348 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2349 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2350 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2351 return status;
2352}
2353
2354static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2355 struct qstr *name, struct nfs_fh *fhandle,
2356 struct nfs_fattr *fattr)
2357{
2358 struct nfs4_exception exception = { };
2359 int err;
2360 do {
7c513058 2361 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2362 /* FIXME: !!!! */
2363 if (err == -NFS4ERR_MOVED) {
2364 err = -EREMOTE;
2365 break;
2366 }
2367 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2368 } while (exception.retry);
2369 return err;
2370}
2371
7c513058
BS		 2372static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2373 const struct qstr *name, struct nfs_fh *fhandle,
2374 struct nfs_fattr *fattr)
1da177e4 2375{
4e56e082 2376 int status;
1da177e4
LT		 2377
2378 dprintk("NFS call lookup %s\n", name->name);
7c513058 2379 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2380 if (status == -NFS4ERR_MOVED)
2381 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2382 dprintk("NFS reply lookup: %d\n", status);
2383 return status;
2384}
2385
7c513058
BS		 2386static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2387 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2388{
2389 struct nfs4_exception exception = { };
2390 int err;
2391 do {
2392 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2393 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4
LT		 2394 &exception);
2395 } while (exception.retry);
2396 return err;
2397}
2398
2399static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2400{
76b32999 2401 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2402 struct nfs4_accessargs args = {
2403 .fh = NFS_FH(inode),
76b32999
TM		 2404 .bitmask = server->attr_bitmask,
2405 };
2406 struct nfs4_accessres res = {
2407 .server = server,
1da177e4 2408 };
1da177e4
LT		 2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2411 .rpc_argp = &args,
2412 .rpc_resp = &res,
2413 .rpc_cred = entry->cred,
2414 };
2415 int mode = entry->mask;
2416 int status;
2417
2418 /*
2419 * Determine which access bits we want to ask for...
2420 */
2421 if (mode & MAY_READ)
2422 args.access |= NFS4_ACCESS_READ;
2423 if (S_ISDIR(inode->i_mode)) {
2424 if (mode & MAY_WRITE)
2425 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2426 if (mode & MAY_EXEC)
2427 args.access |= NFS4_ACCESS_LOOKUP;
2428 } else {
2429 if (mode & MAY_WRITE)
2430 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2431 if (mode & MAY_EXEC)
2432 args.access |= NFS4_ACCESS_EXECUTE;
2433 }
c407d41a
TM		 2434
2435 res.fattr = nfs_alloc_fattr();
2436 if (res.fattr == NULL)
2437 return -ENOMEM;
2438
7c513058 2439 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2440 if (!status) {
2441 entry->mask = 0;
2442 if (res.access & NFS4_ACCESS_READ)
2443 entry->mask |= MAY_READ;
2444 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2445 entry->mask |= MAY_WRITE;
2446 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2447 entry->mask |= MAY_EXEC;
c407d41a 2448 nfs_refresh_inode(inode, res.fattr);
1da177e4 2449 }
c407d41a 2450 nfs_free_fattr(res.fattr);
1da177e4
LT		 2451 return status;
2452}
2453
2454static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2455{
2456 struct nfs4_exception exception = { };
2457 int err;
2458 do {
2459 err = nfs4_handle_exception(NFS_SERVER(inode),
2460 _nfs4_proc_access(inode, entry),
2461 &exception);
2462 } while (exception.retry);
2463 return err;
2464}
2465
2466/*
2467 * TODO: For the time being, we don't try to get any attributes
2468 * along with any of the zero-copy operations READ, READDIR,
2469 * READLINK, WRITE.
2470 *
2471 * In the case of the first three, we want to put the GETATTR
2472 * after the read-type operation -- this is because it is hard
2473 * to predict the length of a GETATTR response in v4, and thus
2474 * align the READ data correctly. This means that the GETATTR
2475 * may end up partially falling into the page cache, and we should
2476 * shift it into the 'tail' of the xdr_buf before processing.
2477 * To do this efficiently, we need to know the total length
2478 * of data received, which doesn't seem to be available outside
2479 * of the RPC layer.
2480 *
2481 * In the case of WRITE, we also want to put the GETATTR after
2482 * the operation -- in this case because we want to make sure
2483 * we get the post-operation mtime and size. This means that
2484 * we can't use xdr_encode_pages() as written: we need a variant
2485 * of it which would leave room in the 'tail' iovec.
2486 *
2487 * Both of these changes to the XDR layer would in fact be quite
2488 * minor, but I decided to leave them for a subsequent patch.
2489 */
2490static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2491 unsigned int pgbase, unsigned int pglen)
2492{
2493 struct nfs4_readlink args = {
2494 .fh = NFS_FH(inode),
2495 .pgbase = pgbase,
2496 .pglen = pglen,
2497 .pages = &page,
2498 };
f50c7000 2499 struct nfs4_readlink_res res;
1da177e4
LT		 2500 struct rpc_message msg = {
2501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2502 .rpc_argp = &args,
f50c7000 2503 .rpc_resp = &res,
1da177e4
LT		 2504 };
2505
7c513058 2506 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2507}
2508
2509static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2510 unsigned int pgbase, unsigned int pglen)
2511{
2512 struct nfs4_exception exception = { };
2513 int err;
2514 do {
2515 err = nfs4_handle_exception(NFS_SERVER(inode),
2516 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2517 &exception);
2518 } while (exception.retry);
2519 return err;
2520}
2521
1da177e4
LT		 2522/*
2523 * Got race?
2524 * We will need to arrange for the VFS layer to provide an atomic open.
2525 * Until then, this create/open method is prone to inefficiency and race
2526 * conditions due to the lookup, create, and open VFS calls from sys_open()
2527 * placed on the wire.
2528 *
2529 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2530 * The file will be opened again in the subsequent VFS open call
2531 * (nfs4_proc_file_open).
2532 *
2533 * The open for read will just hang around to be used by any process that
2534 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2535 */
2536
2537static int
2538nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2539 int flags, struct nfs_open_context *ctx)
1da177e4 2540{
c0204fd2 2541 struct path my_path = {
ad389da7
TM		 2542 .dentry = dentry,
2543 };
c0204fd2 2544 struct path *path = &my_path;
1da177e4 2545 struct nfs4_state *state;
c0204fd2
TM		 2546 struct rpc_cred *cred = NULL;
2547 fmode_t fmode = 0;
1da177e4
LT		 2548 int status = 0;
2549
c0204fd2
TM		 2550 if (ctx != NULL) {
2551 cred = ctx->cred;
2552 path = &ctx->path;
2553 fmode = ctx->mode;
1da177e4 2554 }
a8a5da99 2555 sattr->ia_mode &= ~current_umask();
c0204fd2 2556 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2557 d_drop(dentry);
1da177e4
LT		 2558 if (IS_ERR(state)) {
2559 status = PTR_ERR(state);
c0204fd2 2560 goto out;
1da177e4 2561 }
d4d9cdcb 2562 d_add(dentry, igrab(state->inode));
d75340cc 2563 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2564 if (ctx != NULL)
2565 ctx->state = state;
02a913a7 2566 else
c0204fd2 2567 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2568out:
2569 return status;
2570}
2571
2572static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2573{
16e42959 2574 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2575 struct nfs_removeargs args = {
1da177e4 2576 .fh = NFS_FH(dir),
4fdc17b2
TM		 2577 .name.len = name->len,
2578 .name.name = name->name,
16e42959
TM		 2579 .bitmask = server->attr_bitmask,
2580 };
4fdc17b2 2581 struct nfs_removeres res = {
16e42959 2582 .server = server,
1da177e4 2583 };
1da177e4 2584 struct rpc_message msg = {
4fdc17b2
TM		 2585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2586 .rpc_argp = &args,
2587 .rpc_resp = &res,
1da177e4 2588 };
d346890b
TM		 2589 int status = -ENOMEM;
2590
2591 res.dir_attr = nfs_alloc_fattr();
2592 if (res.dir_attr == NULL)
2593 goto out;
1da177e4 2594
7c513058 2595 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2596 if (status == 0) {
2597 update_changeattr(dir, &res.cinfo);
d346890b 2598 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2599 }
d346890b
TM		 2600 nfs_free_fattr(res.dir_attr);
2601out:
1da177e4
LT		 2602 return status;
2603}
2604
2605static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2606{
2607 struct nfs4_exception exception = { };
2608 int err;
2609 do {
2610 err = nfs4_handle_exception(NFS_SERVER(dir),
2611 _nfs4_proc_remove(dir, name),
2612 &exception);
2613 } while (exception.retry);
2614 return err;
2615}
2616
e4eff1a6 2617static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2618{
e4eff1a6
TM		 2619 struct nfs_server *server = NFS_SERVER(dir);
2620 struct nfs_removeargs *args = msg->rpc_argp;
2621 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2622
a65318bf 2623 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2624 res->server = server;
dfb4f309 2625 res->seq_res.sr_slot = NULL;
1da177e4 2626 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2627}
2628
e4eff1a6 2629static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2630{
e4eff1a6
TM		 2631 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2632
14516c3a
TM		 2633 if (!nfs4_sequence_done(task, &res->seq_res))
2634 return 0;
9e33bed5 2635 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2636 return 0;
2637 update_changeattr(dir, &res->cinfo);
d346890b 2638 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2639 return 1;
1da177e4
LT		 2640}
2641
d3d4152a
JL		 2642static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2643{
2644 struct nfs_server *server = NFS_SERVER(dir);
2645 struct nfs_renameargs *arg = msg->rpc_argp;
2646 struct nfs_renameres *res = msg->rpc_resp;
2647
2648 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2649 arg->bitmask = server->attr_bitmask;
2650 res->server = server;
2651}
2652
2653static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2654 struct inode *new_dir)
2655{
2656 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2657
2658 if (!nfs4_sequence_done(task, &res->seq_res))
2659 return 0;
2660 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2661 return 0;
2662
2663 update_changeattr(old_dir, &res->old_cinfo);
2664 nfs_post_op_update_inode(old_dir, res->old_fattr);
2665 update_changeattr(new_dir, &res->new_cinfo);
2666 nfs_post_op_update_inode(new_dir, res->new_fattr);
2667 return 1;
2668}
2669
1da177e4
LT		 2670static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2671 struct inode *new_dir, struct qstr *new_name)
2672{
6caf2c82 2673 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2674 struct nfs_renameargs arg = {
1da177e4
LT		 2675 .old_dir = NFS_FH(old_dir),
2676 .new_dir = NFS_FH(new_dir),
2677 .old_name = old_name,
2678 .new_name = new_name,
6caf2c82
TM		 2679 .bitmask = server->attr_bitmask,
2680 };
e8582a8b 2681 struct nfs_renameres res = {
6caf2c82 2682 .server = server,
1da177e4 2683 };
1da177e4
LT		 2684 struct rpc_message msg = {
2685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2686 .rpc_argp = &arg,
2687 .rpc_resp = &res,
2688 };
011fff72 2689 int status = -ENOMEM;
1da177e4 2690
011fff72
TM		 2691 res.old_fattr = nfs_alloc_fattr();
2692 res.new_fattr = nfs_alloc_fattr();
2693 if (res.old_fattr == NULL || res.new_fattr == NULL)
2694 goto out;
1da177e4 2695
7c513058 2696 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2697 if (!status) {
2698 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2699 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2700 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2701 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2702 }
011fff72
TM		 2703out:
2704 nfs_free_fattr(res.new_fattr);
2705 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2706 return status;
2707}
2708
2709static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2710 struct inode *new_dir, struct qstr *new_name)
2711{
2712 struct nfs4_exception exception = { };
2713 int err;
2714 do {
2715 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2716 _nfs4_proc_rename(old_dir, old_name,
2717 new_dir, new_name),
2718 &exception);
2719 } while (exception.retry);
2720 return err;
2721}
2722
2723static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2724{
91ba2eee 2725 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2726 struct nfs4_link_arg arg = {
2727 .fh = NFS_FH(inode),
2728 .dir_fh = NFS_FH(dir),
2729 .name = name,
91ba2eee
TM		 2730 .bitmask = server->attr_bitmask,
2731 };
91ba2eee
TM		 2732 struct nfs4_link_res res = {
2733 .server = server,
1da177e4 2734 };
1da177e4
LT		 2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2737 .rpc_argp = &arg,
91ba2eee 2738 .rpc_resp = &res,
1da177e4 2739 };
136f2627
TM		 2740 int status = -ENOMEM;
2741
2742 res.fattr = nfs_alloc_fattr();
2743 res.dir_attr = nfs_alloc_fattr();
2744 if (res.fattr == NULL || res.dir_attr == NULL)
2745 goto out;
1da177e4 2746
7c513058 2747 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2748 if (!status) {
2749 update_changeattr(dir, &res.cinfo);
2750 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2751 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2752 }
136f2627
TM		 2753out:
2754 nfs_free_fattr(res.dir_attr);
2755 nfs_free_fattr(res.fattr);
1da177e4
LT		 2756 return status;
2757}
2758
2759static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2760{
2761 struct nfs4_exception exception = { };
2762 int err;
2763 do {
2764 err = nfs4_handle_exception(NFS_SERVER(inode),
2765 _nfs4_proc_link(inode, dir, name),
2766 &exception);
2767 } while (exception.retry);
2768 return err;
2769}
2770
57dc9a57
TM		 2771struct nfs4_createdata {
2772 struct rpc_message msg;
2773 struct nfs4_create_arg arg;
2774 struct nfs4_create_res res;
2775 struct nfs_fh fh;
2776 struct nfs_fattr fattr;
2777 struct nfs_fattr dir_fattr;
2778};
2779
2780static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2781 struct qstr *name, struct iattr *sattr, u32 ftype)
2782{
2783 struct nfs4_createdata *data;
2784
2785 data = kzalloc(sizeof(*data), GFP_KERNEL);
2786 if (data != NULL) {
2787 struct nfs_server *server = NFS_SERVER(dir);
2788
2789 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2790 data->msg.rpc_argp = &data->arg;
2791 data->msg.rpc_resp = &data->res;
2792 data->arg.dir_fh = NFS_FH(dir);
2793 data->arg.server = server;
2794 data->arg.name = name;
2795 data->arg.attrs = sattr;
2796 data->arg.ftype = ftype;
2797 data->arg.bitmask = server->attr_bitmask;
2798 data->res.server = server;
2799 data->res.fh = &data->fh;
2800 data->res.fattr = &data->fattr;
2801 data->res.dir_fattr = &data->dir_fattr;
2802 nfs_fattr_init(data->res.fattr);
2803 nfs_fattr_init(data->res.dir_fattr);
2804 }
2805 return data;
2806}
2807
2808static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2809{
7c513058 2810 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2811 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2812 if (status == 0) {
2813 update_changeattr(dir, &data->res.dir_cinfo);
2814 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2815 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2816 }
2817 return status;
2818}
2819
2820static void nfs4_free_createdata(struct nfs4_createdata *data)
2821{
2822 kfree(data);
2823}
2824
4f390c15 2825static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2826 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2827{
57dc9a57
TM		 2828 struct nfs4_createdata *data;
2829 int status = -ENAMETOOLONG;
1da177e4 2830
94a6d753 2831 if (len > NFS4_MAXPATHLEN)
57dc9a57 2832 goto out;
4f390c15 2833
57dc9a57
TM		 2834 status = -ENOMEM;
2835 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2836 if (data == NULL)
2837 goto out;
2838
2839 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2840 data->arg.u.symlink.pages = &page;
2841 data->arg.u.symlink.len = len;
1da177e4 2842
57dc9a57
TM		 2843 status = nfs4_do_create(dir, dentry, data);
2844
2845 nfs4_free_createdata(data);
2846out:
1da177e4
LT		 2847 return status;
2848}
2849
4f390c15 2850static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2851 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2852{
2853 struct nfs4_exception exception = { };
2854 int err;
2855 do {
2856 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2857 _nfs4_proc_symlink(dir, dentry, page,
2858 len, sattr),
1da177e4
LT		 2859 &exception);
2860 } while (exception.retry);
2861 return err;
2862}
2863
2864static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2865 struct iattr *sattr)
2866{
57dc9a57
TM		 2867 struct nfs4_createdata *data;
2868 int status = -ENOMEM;
1da177e4 2869
57dc9a57
TM		 2870 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2871 if (data == NULL)
2872 goto out;
2873
2874 status = nfs4_do_create(dir, dentry, data);
2875
2876 nfs4_free_createdata(data);
2877out:
1da177e4
LT		 2878 return status;
2879}
2880
2881static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2882 struct iattr *sattr)
2883{
2884 struct nfs4_exception exception = { };
2885 int err;
a8a5da99
AK		 2886
2887 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2888 do {
2889 err = nfs4_handle_exception(NFS_SERVER(dir),
2890 _nfs4_proc_mkdir(dir, dentry, sattr),
2891 &exception);
2892 } while (exception.retry);
2893 return err;
2894}
2895
2896static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2897 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2898{
2899 struct inode *dir = dentry->d_inode;
2900 struct nfs4_readdir_arg args = {
2901 .fh = NFS_FH(dir),
56e4ebf8 2902 .pages = pages,
1da177e4
LT		 2903 .pgbase = 0,
2904 .count = count,
96d25e53 2905 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2906 .plus = plus,
1da177e4
LT		 2907 };
2908 struct nfs4_readdir_res res;
2909 struct rpc_message msg = {
2910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2911 .rpc_argp = &args,
2912 .rpc_resp = &res,
2913 .rpc_cred = cred,
2914 };
2915 int status;
2916
3110ff80 2917 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2918 dentry->d_parent->d_name.name,
2919 dentry->d_name.name,
2920 (unsigned long long)cookie);
1da177e4
LT		 2921 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2922 res.pgbase = args.pgbase;
7c513058 2923 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 2924 if (status >= 0) {
1da177e4 2925 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2926 status += args.pgbase;
2927 }
c4812998
TM		 2928
2929 nfs_invalidate_atime(dir);
2930
3110ff80 2931 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2932 return status;
2933}
2934
2935static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2936 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2937{
2938 struct nfs4_exception exception = { };
2939 int err;
2940 do {
2941 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2942 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 2943 pages, count, plus),
1da177e4
LT		 2944 &exception);
2945 } while (exception.retry);
2946 return err;
2947}
2948
2949static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr, dev_t rdev)
2951{
57dc9a57
TM		 2952 struct nfs4_createdata *data;
2953 int mode = sattr->ia_mode;
2954 int status = -ENOMEM;
1da177e4
LT		 2955
2956 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2957 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2958
2959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2960 if (data == NULL)
2961 goto out;
2962
1da177e4 2963 if (S_ISFIFO(mode))
57dc9a57 2964 data->arg.ftype = NF4FIFO;
1da177e4 2965 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2966 data->arg.ftype = NF4BLK;
2967 data->arg.u.device.specdata1 = MAJOR(rdev);
2968 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2969 }
2970 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2971 data->arg.ftype = NF4CHR;
2972 data->arg.u.device.specdata1 = MAJOR(rdev);
2973 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2974 }
1da177e4 2975
57dc9a57
TM		 2976 status = nfs4_do_create(dir, dentry, data);
2977
2978 nfs4_free_createdata(data);
2979out:
1da177e4
LT		 2980 return status;
2981}
2982
2983static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2984 struct iattr *sattr, dev_t rdev)
2985{
2986 struct nfs4_exception exception = { };
2987 int err;
a8a5da99
AK		 2988
2989 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2990 do {
2991 err = nfs4_handle_exception(NFS_SERVER(dir),
2992 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2993 &exception);
2994 } while (exception.retry);
2995 return err;
2996}
2997
2998static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2999 struct nfs_fsstat *fsstat)
3000{
3001 struct nfs4_statfs_arg args = {
3002 .fh = fhandle,
3003 .bitmask = server->attr_bitmask,
3004 };
24ad148a
BH		 3005 struct nfs4_statfs_res res = {
3006 .fsstat = fsstat,
3007 };
1da177e4
LT		 3008 struct rpc_message msg = {
3009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3010 .rpc_argp = &args,
24ad148a 3011 .rpc_resp = &res,
1da177e4
LT		 3012 };
3013
0e574af1 3014 nfs_fattr_init(fsstat->fattr);
7c513058 3015 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3016}
3017
3018static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022 do {
3023 err = nfs4_handle_exception(server,
3024 _nfs4_proc_statfs(server, fhandle, fsstat),
3025 &exception);
3026 } while (exception.retry);
3027 return err;
3028}
3029
3030static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3031 struct nfs_fsinfo *fsinfo)
3032{
3033 struct nfs4_fsinfo_arg args = {
3034 .fh = fhandle,
3035 .bitmask = server->attr_bitmask,
3036 };
3dda5e43
BH		 3037 struct nfs4_fsinfo_res res = {
3038 .fsinfo = fsinfo,
3039 };
1da177e4
LT		 3040 struct rpc_message msg = {
3041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3042 .rpc_argp = &args,
3dda5e43 3043 .rpc_resp = &res,
1da177e4
LT		 3044 };
3045
7c513058 3046 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3047}
3048
3049static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3050{
3051 struct nfs4_exception exception = { };
3052 int err;
3053
3054 do {
3055 err = nfs4_handle_exception(server,
3056 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3057 &exception);
3058 } while (exception.retry);
3059 return err;
3060}
3061
3062static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3063{
0e574af1 3064 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3065 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3066}
3067
3068static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3069 struct nfs_pathconf *pathconf)
3070{
3071 struct nfs4_pathconf_arg args = {
3072 .fh = fhandle,
3073 .bitmask = server->attr_bitmask,
3074 };
d45b2989
BH		 3075 struct nfs4_pathconf_res res = {
3076 .pathconf = pathconf,
3077 };
1da177e4
LT		 3078 struct rpc_message msg = {
3079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3080 .rpc_argp = &args,
d45b2989 3081 .rpc_resp = &res,
1da177e4
LT		 3082 };
3083
3084 /* None of the pathconf attributes are mandatory to implement */
3085 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3086 memset(pathconf, 0, sizeof(*pathconf));
3087 return 0;
3088 }
3089
0e574af1 3090 nfs_fattr_init(pathconf->fattr);
7c513058 3091 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3092}
3093
3094static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3095 struct nfs_pathconf *pathconf)
3096{
3097 struct nfs4_exception exception = { };
3098 int err;
3099
3100 do {
3101 err = nfs4_handle_exception(server,
3102 _nfs4_proc_pathconf(server, fhandle, pathconf),
3103 &exception);
3104 } while (exception.retry);
3105 return err;
3106}
3107
cbdabc7f 3108static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3109{
ec06c096 3110 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3111
9e33bed5 3112 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3113 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3114 return -EAGAIN;
1da177e4 3115 }
8850df99
TM		 3116
3117 nfs_invalidate_atime(data->inode);
1da177e4 3118 if (task->tk_status > 0)
ec06c096
TM		 3119 renew_lease(server, data->timestamp);
3120 return 0;
1da177e4
LT		 3121}
3122
cbdabc7f
AA		 3123static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3124{
3125
3126 dprintk("--> %s\n", __func__);
3127
3128 if (!nfs4_sequence_done(task, &data->res.seq_res))
3129 return -EAGAIN;
3130
3131 return data->read_done_cb(task, data);
3132}
3133
bdc7f021 3134static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3135{
1da177e4 3136 data->timestamp = jiffies;
cbdabc7f 3137 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3138 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3139}
3140
cbdabc7f
AA		 3141/* Reset the the nfs_read_data to send the read to the MDS. */
3142void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3143{
3144 dprintk("%s Reset task for i/o through\n", __func__);
3145 put_lseg(data->lseg);
3146 data->lseg = NULL;
3147 /* offsets will differ in the dense stripe case */
3148 data->args.offset = data->mds_offset;
3149 data->ds_clp = NULL;
3150 data->args.fh = NFS_FH(data->inode);
3151 data->read_done_cb = nfs4_read_done_cb;
3152 task->tk_ops = data->mds_ops;
3153 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3154}
3155EXPORT_SYMBOL_GPL(nfs4_reset_read);
3156
b029bc9b 3157static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3158{
1da177e4
LT		 3159 struct inode *inode = data->inode;
3160
9e33bed5 3161 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3162 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3163 return -EAGAIN;
1da177e4 3164 }
4f9838c7 3165 if (task->tk_status >= 0) {
1da177e4 3166 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3167 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3168 }
788e7a89 3169 return 0;
1da177e4
LT		 3170}
3171
b029bc9b
FI		 3172static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3173{
3174 if (!nfs4_sequence_done(task, &data->res.seq_res))
3175 return -EAGAIN;
3176 return data->write_done_cb(task, data);
3177}
3178
a69aef14
FI		 3179/* Reset the the nfs_write_data to send the write to the MDS. */
3180void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3181{
3182 dprintk("%s Reset task for i/o through\n", __func__);
3183 put_lseg(data->lseg);
3184 data->lseg = NULL;
3185 data->ds_clp = NULL;
3186 data->write_done_cb = nfs4_write_done_cb;
3187 data->args.fh = NFS_FH(data->inode);
3188 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3189 data->args.offset = data->mds_offset;
3190 data->res.fattr = &data->fattr;
3191 task->tk_ops = data->mds_ops;
3192 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3193}
3194EXPORT_SYMBOL_GPL(nfs4_reset_write);
3195
bdc7f021 3196static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3197{
bdc7f021
TM		 3198 struct nfs_server *server = NFS_SERVER(data->inode);
3199
7ffd1064
FI		 3200 if (data->lseg) {
3201 data->args.bitmask = NULL;
3202 data->res.fattr = NULL;
3203 } else
3204 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3205 if (!data->write_done_cb)
3206 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3207 data->res.server = server;
1da177e4
LT		 3208 data->timestamp = jiffies;
3209
bdc7f021 3210 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3211}
3212
788e7a89 3213static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3214{
1da177e4
LT		 3215 struct inode *inode = data->inode;
3216
14516c3a
TM		 3217 if (!nfs4_sequence_done(task, &data->res.seq_res))
3218 return -EAGAIN;
3219
9e33bed5 3220 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3221 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3222 return -EAGAIN;
1da177e4 3223 }
9e08a3c5 3224 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3225 return 0;
1da177e4
LT		 3226}
3227
bdc7f021 3228static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3229{
788e7a89 3230 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3231
a65318bf 3232 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3233 data->res.server = server;
bdc7f021 3234 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3235}
3236
9bc4e3ca
CL		 3237struct nfs4_renewdata {
3238 struct nfs_client *client;
3239 unsigned long timestamp;
3240};
3241
1da177e4
LT		 3242/*
3243 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3244 * standalone procedure for queueing an asynchronous RENEW.
3245 */
9bc4e3ca 3246static void nfs4_renew_release(void *calldata)
dc96aef9 3247{
9bc4e3ca
CL		 3248 struct nfs4_renewdata *data = calldata;
3249 struct nfs_client *clp = data->client;
dc96aef9 3250
0851de06
AB		 3251 if (atomic_read(&clp->cl_count) > 1)
3252 nfs4_schedule_state_renewal(clp);
3253 nfs_put_client(clp);
9bc4e3ca 3254 kfree(data);
dc96aef9
AB		 3255}
3256
9bc4e3ca 3257static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3258{
9bc4e3ca
CL		 3259 struct nfs4_renewdata *data = calldata;
3260 struct nfs_client *clp = data->client;
3261 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3262
3263 if (task->tk_status < 0) {
95baa25c
TM		 3264 /* Unless we're shutting down, schedule state recovery! */
3265 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3266 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3267 return;
3268 }
452e9352 3269 do_renew_lease(clp, timestamp);
1da177e4
LT		 3270}
3271
963d8fe5
TM		 3272static const struct rpc_call_ops nfs4_renew_ops = {
3273 .rpc_call_done = nfs4_renew_done,
dc96aef9 3274 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3275};
3276
adfa6f98 3277int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3278{
3279 struct rpc_message msg = {
3280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3281 .rpc_argp = clp,
b4454fe1 3282 .rpc_cred = cred,
1da177e4 3283 };
9bc4e3ca 3284 struct nfs4_renewdata *data;
1da177e4 3285
0851de06
AB		 3286 if (!atomic_inc_not_zero(&clp->cl_count))
3287 return -EIO;
9bc4e3ca
CL		 3288 data = kmalloc(sizeof(*data), GFP_KERNEL);
3289 if (data == NULL)
3290 return -ENOMEM;
3291 data->client = clp;
3292 data->timestamp = jiffies;
1da177e4 3293 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3294 &nfs4_renew_ops, data);
1da177e4
LT		 3295}
3296
adfa6f98 3297int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3298{
3299 struct rpc_message msg = {
3300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3301 .rpc_argp = clp,
b4454fe1 3302 .rpc_cred = cred,
1da177e4
LT		 3303 };
3304 unsigned long now = jiffies;
3305 int status;
3306
3307 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3308 if (status < 0)
3309 return status;
452e9352 3310 do_renew_lease(clp, now);
1da177e4
LT		 3311 return 0;
3312}
3313
aa1870af
BF		 3314static inline int nfs4_server_supports_acls(struct nfs_server *server)
3315{
3316 return (server->caps & NFS_CAP_ACLS)
3317 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3318 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3319}
3320
3321/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3322 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3323 * the stack.
3324 */
3325#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3326
3327static void buf_to_pages(const void *buf, size_t buflen,
3328 struct page **pages, unsigned int *pgbase)
3329{
3330 const void *p = buf;
3331
3332 *pgbase = offset_in_page(buf);
3333 p -= *pgbase;
3334 while (p < buf + buflen) {
3335 *(pages++) = virt_to_page(p);
3336 p += PAGE_CACHE_SIZE;
3337 }
3338}
3339
e9e3d724
NH		 3340static int buf_to_pages_noslab(const void *buf, size_t buflen,
3341 struct page **pages, unsigned int *pgbase)
3342{
3343 struct page *newpage, **spages;
3344 int rc = 0;
3345 size_t len;
3346 spages = pages;
3347
3348 do {
43b7c3f0 3349 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3350 newpage = alloc_page(GFP_KERNEL);
3351
3352 if (newpage == NULL)
3353 goto unwind;
3354 memcpy(page_address(newpage), buf, len);
3355 buf += len;
3356 buflen -= len;
3357 *pages++ = newpage;
3358 rc++;
3359 } while (buflen != 0);
3360
3361 return rc;
3362
3363unwind:
3364 for(; rc > 0; rc--)
3365 __free_page(spages[rc-1]);
3366 return -ENOMEM;
3367}
3368
e50a1c2e
BF		 3369struct nfs4_cached_acl {
3370 int cached;
3371 size_t len;
3e9d4154 3372 char data[0];
e50a1c2e
BF		 3373};
3374
3375static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3376{
3377 struct nfs_inode *nfsi = NFS_I(inode);
3378
3379 spin_lock(&inode->i_lock);
3380 kfree(nfsi->nfs4_acl);
3381 nfsi->nfs4_acl = acl;
3382 spin_unlock(&inode->i_lock);
3383}
3384
3385static void nfs4_zap_acl_attr(struct inode *inode)
3386{
3387 nfs4_set_cached_acl(inode, NULL);
3388}
3389
3390static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3391{
3392 struct nfs_inode *nfsi = NFS_I(inode);
3393 struct nfs4_cached_acl *acl;
3394 int ret = -ENOENT;
3395
3396 spin_lock(&inode->i_lock);
3397 acl = nfsi->nfs4_acl;
3398 if (acl == NULL)
3399 goto out;
3400 if (buf == NULL) /* user is just asking for length */
3401 goto out_len;
3402 if (acl->cached == 0)
3403 goto out;
3404 ret = -ERANGE; /* see getxattr(2) man page */
3405 if (acl->len > buflen)
3406 goto out;
3407 memcpy(buf, acl->data, acl->len);
3408out_len:
3409 ret = acl->len;
3410out:
3411 spin_unlock(&inode->i_lock);
3412 return ret;
3413}
3414
3415static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3416{
3417 struct nfs4_cached_acl *acl;
3418
3419 if (buf && acl_len <= PAGE_SIZE) {
3420 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3421 if (acl == NULL)
3422 goto out;
3423 acl->cached = 1;
3424 memcpy(acl->data, buf, acl_len);
3425 } else {
3426 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3427 if (acl == NULL)
3428 goto out;
3429 acl->cached = 0;
3430 }
3431 acl->len = acl_len;
3432out:
3433 nfs4_set_cached_acl(inode, acl);
3434}
3435
16b4289c 3436static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3437{
aa1870af
BF		 3438 struct page *pages[NFS4ACL_MAXPAGES];
3439 struct nfs_getaclargs args = {
3440 .fh = NFS_FH(inode),
3441 .acl_pages = pages,
3442 .acl_len = buflen,
3443 };
663c79b3
BH		 3444 struct nfs_getaclres res = {
3445 .acl_len = buflen,
3446 };
e50a1c2e 3447 void *resp_buf;
aa1870af
BF		 3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3450 .rpc_argp = &args,
663c79b3 3451 .rpc_resp = &res,
aa1870af 3452 };
e50a1c2e 3453 struct page *localpage = NULL;
aa1870af
BF		 3454 int ret;
3455
e50a1c2e
BF		 3456 if (buflen < PAGE_SIZE) {
3457 /* As long as we're doing a round trip to the server anyway,
3458 * let's be prepared for a page of acl data. */
3459 localpage = alloc_page(GFP_KERNEL);
3460 resp_buf = page_address(localpage);
3461 if (localpage == NULL)
3462 return -ENOMEM;
3463 args.acl_pages[0] = localpage;
3464 args.acl_pgbase = 0;
663c79b3 3465 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3466 } else {
3467 resp_buf = buf;
3468 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3469 }
7c513058 3470 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3471 if (ret)
3472 goto out_free;
663c79b3
BH		 3473 if (res.acl_len > args.acl_len)
3474 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3475 else
663c79b3 3476 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3477 if (buf) {
3478 ret = -ERANGE;
663c79b3 3479 if (res.acl_len > buflen)
e50a1c2e
BF		 3480 goto out_free;
3481 if (localpage)
663c79b3 3482 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3483 }
663c79b3 3484 ret = res.acl_len;
e50a1c2e
BF		 3485out_free:
3486 if (localpage)
3487 __free_page(localpage);
aa1870af
BF		 3488 return ret;
3489}
3490
16b4289c
TM		 3491static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3492{
3493 struct nfs4_exception exception = { };
3494 ssize_t ret;
3495 do {
3496 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3497 if (ret >= 0)
3498 break;
3499 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3500 } while (exception.retry);
3501 return ret;
3502}
3503
e50a1c2e
BF		 3504static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3505{
3506 struct nfs_server *server = NFS_SERVER(inode);
3507 int ret;
3508
3509 if (!nfs4_server_supports_acls(server))
3510 return -EOPNOTSUPP;
3511 ret = nfs_revalidate_inode(server, inode);
3512 if (ret < 0)
3513 return ret;
08a22b39
AK		 3514 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3515 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3516 ret = nfs4_read_cached_acl(inode, buf, buflen);
3517 if (ret != -ENOENT)
3518 return ret;
3519 return nfs4_get_acl_uncached(inode, buf, buflen);
3520}
3521
16b4289c 3522static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3523{
3524 struct nfs_server *server = NFS_SERVER(inode);
3525 struct page *pages[NFS4ACL_MAXPAGES];
3526 struct nfs_setaclargs arg = {
3527 .fh = NFS_FH(inode),
3528 .acl_pages = pages,
3529 .acl_len = buflen,
3530 };
73c403a9 3531 struct nfs_setaclres res;
4b580ee3
BF		 3532 struct rpc_message msg = {
3533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3534 .rpc_argp = &arg,
73c403a9 3535 .rpc_resp = &res,
4b580ee3 3536 };
e9e3d724 3537 int ret, i;
4b580ee3
BF		 3538
3539 if (!nfs4_server_supports_acls(server))
3540 return -EOPNOTSUPP;
e9e3d724
NH		 3541 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3542 if (i < 0)
3543 return i;
642ac549 3544 nfs_inode_return_delegation(inode);
7c513058 3545 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3546
3547 /*
3548 * Free each page after tx, so the only ref left is
3549 * held by the network stack
3550 */
3551 for (; i > 0; i--)
3552 put_page(pages[i-1]);
3553
08a22b39
AK		 3554 /*
3555 * Acl update can result in inode attribute update.
3556 * so mark the attribute cache invalid.
3557 */
3558 spin_lock(&inode->i_lock);
3559 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3560 spin_unlock(&inode->i_lock);
f41f7418
TM		 3561 nfs_access_zap_cache(inode);
3562 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3563 return ret;
3564}
3565
16b4289c
TM		 3566static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3567{
3568 struct nfs4_exception exception = { };
3569 int err;
3570 do {
3571 err = nfs4_handle_exception(NFS_SERVER(inode),
3572 __nfs4_proc_set_acl(inode, buf, buflen),
3573 &exception);
3574 } while (exception.retry);
3575 return err;
3576}
3577
1da177e4 3578static int
aa5190d0 3579nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3580{
aa5190d0
TM		 3581 struct nfs_client *clp = server->nfs_client;
3582
3583 if (task->tk_status >= 0)
1da177e4
LT		 3584 return 0;
3585 switch(task->tk_status) {
9e33bed5
TM		 3586 case -NFS4ERR_ADMIN_REVOKED:
3587 case -NFS4ERR_BAD_STATEID:
3588 case -NFS4ERR_OPENMODE:
3589 if (state == NULL)
3590 break;
0400a6b0
TM		 3591 nfs4_schedule_stateid_recovery(server, state);
3592 goto wait_on_recovery;
1da177e4 3593 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3594 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3595 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3596 nfs4_schedule_lease_recovery(clp);
3597 goto wait_on_recovery;
4745e315
AA		 3598#if defined(CONFIG_NFS_V4_1)
3599 case -NFS4ERR_BADSESSION:
3600 case -NFS4ERR_BADSLOT:
3601 case -NFS4ERR_BAD_HIGH_SLOT:
3602 case -NFS4ERR_DEADSESSION:
3603 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3604 case -NFS4ERR_SEQ_FALSE_RETRY:
3605 case -NFS4ERR_SEQ_MISORDERED:
3606 dprintk("%s ERROR %d, Reset session\n", __func__,
3607 task->tk_status);
0400a6b0 3608 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3609 task->tk_status = 0;
3610 return -EAGAIN;
3611#endif /* CONFIG_NFS_V4_1 */
1da177e4 3612 case -NFS4ERR_DELAY:
aa5190d0 3613 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3614 case -NFS4ERR_GRACE:
2c643488 3615 case -EKEYEXPIRED:
1da177e4
LT		 3616 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3617 task->tk_status = 0;
3618 return -EAGAIN;
3619 case -NFS4ERR_OLD_STATEID:
3620 task->tk_status = 0;
3621 return -EAGAIN;
3622 }
3623 task->tk_status = nfs4_map_errors(task->tk_status);
3624 return 0;
0400a6b0 3625wait_on_recovery:
a2c0b9e2 3626 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3627 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3628 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3629 task->tk_status = 0;
3630 return -EAGAIN;
1da177e4
LT		 3631}
3632
bb8b27e5
TM		 3633int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3634 unsigned short port, struct rpc_cred *cred,
3635 struct nfs4_setclientid_res *res)
1da177e4
LT		 3636{
3637 nfs4_verifier sc_verifier;
3638 struct nfs4_setclientid setclientid = {
3639 .sc_verifier = &sc_verifier,
3640 .sc_prog = program,
f4eecd5d 3641 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3642 };
3643 struct rpc_message msg = {
3644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3645 .rpc_argp = &setclientid,
bb8b27e5 3646 .rpc_resp = res,
286d7d6a 3647 .rpc_cred = cred,
1da177e4 3648 };
bc4785cd 3649 __be32 *p;
1da177e4
LT		 3650 int loop = 0;
3651 int status;
3652
bc4785cd 3653 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3654 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3655 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3656
3657 for(;;) {
3658 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3659 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3660 clp->cl_ipaddr,
3661 rpc_peeraddr2str(clp->cl_rpcclient,
3662 RPC_DISPLAY_ADDR),
69dd716c
TM		 3663 rpc_peeraddr2str(clp->cl_rpcclient,
3664 RPC_DISPLAY_PROTO),
78ea323b 3665 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3666 clp->cl_id_uniquifier);
3667 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3668 sizeof(setclientid.sc_netid),
3669 rpc_peeraddr2str(clp->cl_rpcclient,
3670 RPC_DISPLAY_NETID));
1da177e4 3671 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3672 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3673 clp->cl_ipaddr, port >> 8, port & 255);
3674
3675 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3676 if (status != -NFS4ERR_CLID_INUSE)
3677 break;
3678 if (signalled())
3679 break;
3680 if (loop++ & 1)
611c96c8 3681 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3682 else
3683 if (++clp->cl_id_uniquifier == 0)
3684 break;
3685 }
3686 return status;
3687}
3688
bb8b27e5
TM		 3689static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3690 struct nfs4_setclientid_res *arg,
3691 struct rpc_cred *cred)
1da177e4
LT		 3692{
3693 struct nfs_fsinfo fsinfo;
3694 struct rpc_message msg = {
3695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3696 .rpc_argp = arg,
1da177e4 3697 .rpc_resp = &fsinfo,
286d7d6a 3698 .rpc_cred = cred,
1da177e4
LT		 3699 };
3700 unsigned long now;
3701 int status;
3702
3703 now = jiffies;
3704 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3705 if (status == 0) {
3706 spin_lock(&clp->cl_lock);
3707 clp->cl_lease_time = fsinfo.lease_time * HZ;
3708 clp->cl_last_renewal = now;
3709 spin_unlock(&clp->cl_lock);
3710 }
3711 return status;
3712}
3713
bb8b27e5
TM		 3714int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3715 struct nfs4_setclientid_res *arg,
3716 struct rpc_cred *cred)
51581f3b 3717{
77e03677 3718 long timeout = 0;
51581f3b
TM		 3719 int err;
3720 do {
bb8b27e5 3721 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
51581f3b
TM		 3722 switch (err) {
3723 case 0:
3724 return err;
3725 case -NFS4ERR_RESOURCE:
3726 /* The IBM lawyers misread another document! */
3727 case -NFS4ERR_DELAY:
3728 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3729 }
3730 } while (err == 0);
3731 return err;
3732}
3733
fe650407
TM		 3734struct nfs4_delegreturndata {
3735 struct nfs4_delegreturnargs args;
fa178f29 3736 struct nfs4_delegreturnres res;
fe650407
TM		 3737 struct nfs_fh fh;
3738 nfs4_stateid stateid;
26e976a8 3739 unsigned long timestamp;
fa178f29 3740 struct nfs_fattr fattr;
fe650407
TM		 3741 int rpc_status;
3742};
3743
fe650407
TM		 3744static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3745{
3746 struct nfs4_delegreturndata *data = calldata;
938e1010 3747
14516c3a
TM		 3748 if (!nfs4_sequence_done(task, &data->res.seq_res))
3749 return;
938e1010 3750
79708861
RL		 3751 switch (task->tk_status) {
3752 case -NFS4ERR_STALE_STATEID:
3753 case -NFS4ERR_EXPIRED:
3754 case 0:
fa178f29 3755 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3756 break;
3757 default:
3758 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3759 -EAGAIN) {
3760 nfs_restart_rpc(task, data->res.server->nfs_client);
3761 return;
3762 }
3763 }
3764 data->rpc_status = task->tk_status;
fe650407
TM		 3765}
3766
3767static void nfs4_delegreturn_release(void *calldata)
3768{
fe650407
TM		 3769 kfree(calldata);
3770}
3771
938e1010
AA		 3772#if defined(CONFIG_NFS_V4_1)
3773static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3774{
3775 struct nfs4_delegreturndata *d_data;
3776
3777 d_data = (struct nfs4_delegreturndata *)data;
3778
035168ab 3779 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3780 &d_data->args.seq_args,
3781 &d_data->res.seq_res, 1, task))
3782 return;
3783 rpc_call_start(task);
3784}
3785#endif /* CONFIG_NFS_V4_1 */
3786
c8d149f3 3787static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3788#if defined(CONFIG_NFS_V4_1)
3789 .rpc_call_prepare = nfs4_delegreturn_prepare,
3790#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3791 .rpc_call_done = nfs4_delegreturn_done,
3792 .rpc_release = nfs4_delegreturn_release,
3793};
3794
e6f81075 3795static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3796{
3797 struct nfs4_delegreturndata *data;
fa178f29 3798 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3799 struct rpc_task *task;
5138fde0
TM		 3800 struct rpc_message msg = {
3801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3802 .rpc_cred = cred,
3803 };
c970aa85
TM		 3804 struct rpc_task_setup task_setup_data = {
3805 .rpc_client = server->client,
5138fde0 3806 .rpc_message = &msg,
c970aa85
TM		 3807 .callback_ops = &nfs4_delegreturn_ops,
3808 .flags = RPC_TASK_ASYNC,
3809 };
e6f81075 3810 int status = 0;
fe650407 3811
8535b2be 3812 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3813 if (data == NULL)
3814 return -ENOMEM;
3815 data->args.fhandle = &data->fh;
3816 data->args.stateid = &data->stateid;
fa178f29 3817 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3818 nfs_copy_fh(&data->fh, NFS_FH(inode));
3819 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3820 data->res.fattr = &data->fattr;
3821 data->res.server = server;
5138fde0 3822 nfs_fattr_init(data->res.fattr);
26e976a8 3823 data->timestamp = jiffies;
fe650407
TM		 3824 data->rpc_status = 0;
3825
c970aa85 3826 task_setup_data.callback_data = data;
1174dd1f
TM		 3827 msg.rpc_argp = &data->args;
3828 msg.rpc_resp = &data->res;
c970aa85 3829 task = rpc_run_task(&task_setup_data);
7a1218a2 3830 if (IS_ERR(task))
fe650407 3831 return PTR_ERR(task);
e6f81075
TM		 3832 if (!issync)
3833 goto out;
fe650407 3834 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3835 if (status != 0)
3836 goto out;
3837 status = data->rpc_status;
3838 if (status != 0)
3839 goto out;
3840 nfs_refresh_inode(inode, &data->fattr);
3841out:
e6b3c4db 3842 rpc_put_task(task);
fe650407 3843 return status;
1da177e4
LT		 3844}
3845
e6f81075 3846int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3847{
3848 struct nfs_server *server = NFS_SERVER(inode);
3849 struct nfs4_exception exception = { };
3850 int err;
3851 do {
e6f81075 3852 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3853 switch (err) {
3854 case -NFS4ERR_STALE_STATEID:
3855 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3856 case 0:
3857 return 0;
3858 }
3859 err = nfs4_handle_exception(server, err, &exception);
3860 } while (exception.retry);
3861 return err;
3862}
3863
3864#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3865#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3866
3867/*
3868 * sleep, with exponential backoff, and retry the LOCK operation.
3869 */
3870static unsigned long
3871nfs4_set_lock_task_retry(unsigned long timeout)
3872{
150030b7 3873 schedule_timeout_killable(timeout);
1da177e4
LT		 3874 timeout <<= 1;
3875 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3876 return NFS4_LOCK_MAXTIMEOUT;
3877 return timeout;
3878}
3879
1da177e4
LT		 3880static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3881{
3882 struct inode *inode = state->inode;
3883 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3884 struct nfs_client *clp = server->nfs_client;
911d1aaf 3885 struct nfs_lockt_args arg = {
1da177e4 3886 .fh = NFS_FH(inode),
911d1aaf 3887 .fl = request,
1da177e4 3888 };
911d1aaf
TM		 3889 struct nfs_lockt_res res = {
3890 .denied = request,
1da177e4
LT		 3891 };
3892 struct rpc_message msg = {
3893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3894 .rpc_argp = &arg,
3895 .rpc_resp = &res,
3896 .rpc_cred = state->owner->so_cred,
3897 };
1da177e4
LT		 3898 struct nfs4_lock_state *lsp;
3899 int status;
3900
911d1aaf 3901 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3902 status = nfs4_set_lock_state(state, request);
3903 if (status != 0)
3904 goto out;
3905 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3906 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3907 arg.lock_owner.s_dev = server->s_dev;
7c513058 3908 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 3909 switch (status) {
3910 case 0:
3911 request->fl_type = F_UNLCK;
3912 break;
3913 case -NFS4ERR_DENIED:
3914 status = 0;
1da177e4 3915 }
70cc6487 3916 request->fl_ops->fl_release_private(request);
8d0a8a9d 3917out:
1da177e4
LT		 3918 return status;
3919}
3920
3921static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3922{
3923 struct nfs4_exception exception = { };
3924 int err;
3925
3926 do {
3927 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3928 _nfs4_proc_getlk(state, cmd, request),
3929 &exception);
3930 } while (exception.retry);
3931 return err;
3932}
3933
3934static int do_vfs_lock(struct file *file, struct file_lock *fl)
3935{
3936 int res = 0;
3937 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3938 case FL_POSIX:
3939 res = posix_lock_file_wait(file, fl);
3940 break;
3941 case FL_FLOCK:
3942 res = flock_lock_file_wait(file, fl);
3943 break;
3944 default:
3945 BUG();
3946 }
1da177e4
LT		 3947 return res;
3948}
3949
faf5f49c 3950struct nfs4_unlockdata {
911d1aaf
TM		 3951 struct nfs_locku_args arg;
3952 struct nfs_locku_res res;
faf5f49c
TM		 3953 struct nfs4_lock_state *lsp;
3954 struct nfs_open_context *ctx;
911d1aaf
TM		 3955 struct file_lock fl;
3956 const struct nfs_server *server;
26e976a8 3957 unsigned long timestamp;
faf5f49c
TM		 3958};
3959
911d1aaf
TM		 3960static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3961 struct nfs_open_context *ctx,
3962 struct nfs4_lock_state *lsp,
3963 struct nfs_seqid *seqid)
3964{
3965 struct nfs4_unlockdata *p;
3966 struct inode *inode = lsp->ls_state->inode;
3967
8535b2be 3968 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 3969 if (p == NULL)
3970 return NULL;
3971 p->arg.fh = NFS_FH(inode);
3972 p->arg.fl = &p->fl;
3973 p->arg.seqid = seqid;
c1d51931 3974 p->res.seqid = seqid;
911d1aaf
TM		 3975 p->arg.stateid = &lsp->ls_stateid;
3976 p->lsp = lsp;
3977 atomic_inc(&lsp->ls_count);
3978 /* Ensure we don't close file until we're done freeing locks! */
3979 p->ctx = get_nfs_open_context(ctx);
3980 memcpy(&p->fl, fl, sizeof(p->fl));
3981 p->server = NFS_SERVER(inode);
3982 return p;
3983}
3984
06f814a3 3985static void nfs4_locku_release_calldata(void *data)
faf5f49c 3986{
963d8fe5 3987 struct nfs4_unlockdata *calldata = data;
911d1aaf 3988 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3989 nfs4_put_lock_state(calldata->lsp);
3990 put_nfs_open_context(calldata->ctx);
3991 kfree(calldata);
faf5f49c
TM		 3992}
3993
963d8fe5 3994static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3995{
963d8fe5 3996 struct nfs4_unlockdata *calldata = data;
faf5f49c 3997
14516c3a
TM		 3998 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3999 return;
faf5f49c
TM		 4000 switch (task->tk_status) {
4001 case 0:
4002 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4003 calldata->res.stateid.data,
faf5f49c 4004 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4005 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4006 break;
9e33bed5
TM		 4007 case -NFS4ERR_BAD_STATEID:
4008 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4009 case -NFS4ERR_STALE_STATEID:
4010 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4011 break;
4012 default:
9e33bed5 4013 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4014 nfs_restart_rpc(task,
d61e612a 4015 calldata->server->nfs_client);
faf5f49c 4016 }
faf5f49c
TM		 4017}
4018
4ce70ada 4019static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4020{
4ce70ada 4021 struct nfs4_unlockdata *calldata = data;
faf5f49c 4022
911d1aaf 4023 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4024 return;
4025 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4026 /* Note: exit _without_ running nfs4_locku_done */
4027 task->tk_action = NULL;
faf5f49c
TM		 4028 return;
4029 }
26e976a8 4030 calldata->timestamp = jiffies;
035168ab 4031 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4032 &calldata->arg.seq_args,
4033 &calldata->res.seq_res, 1, task))
4034 return;
5138fde0 4035 rpc_call_start(task);
faf5f49c
TM		 4036}
4037
963d8fe5 4038static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4039 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4040 .rpc_call_done = nfs4_locku_done,
06f814a3 4041 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4042};
4043
a5d16a4d
TM		 4044static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4045 struct nfs_open_context *ctx,
4046 struct nfs4_lock_state *lsp,
4047 struct nfs_seqid *seqid)
4048{
4049 struct nfs4_unlockdata *data;
5138fde0
TM		 4050 struct rpc_message msg = {
4051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4052 .rpc_cred = ctx->cred,
4053 };
c970aa85
TM		 4054 struct rpc_task_setup task_setup_data = {
4055 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4056 .rpc_message = &msg,
c970aa85 4057 .callback_ops = &nfs4_locku_ops,
101070ca 4058 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4059 .flags = RPC_TASK_ASYNC,
4060 };
a5d16a4d 4061
137d6aca
FF		 4062 /* Ensure this is an unlock - when canceling a lock, the
4063 * canceled lock is passed in, and it won't be an unlock.
4064 */
4065 fl->fl_type = F_UNLCK;
4066
a5d16a4d
TM		 4067 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4068 if (data == NULL) {
4069 nfs_free_seqid(seqid);
4070 return ERR_PTR(-ENOMEM);
4071 }
4072
1174dd1f
TM		 4073 msg.rpc_argp = &data->arg;
4074 msg.rpc_resp = &data->res;
c970aa85
TM		 4075 task_setup_data.callback_data = data;
4076 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4077}
4078
faf5f49c
TM		 4079static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4080{
19e03c57 4081 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4082 struct nfs_seqid *seqid;
1da177e4 4083 struct nfs4_lock_state *lsp;
06f814a3
TM		 4084 struct rpc_task *task;
4085 int status = 0;
536ff0f8 4086 unsigned char fl_flags = request->fl_flags;
faf5f49c 4087
8d0a8a9d 4088 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4089 /* Unlock _before_ we do the RPC call */
4090 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4091 down_read(&nfsi->rwsem);
4092 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4093 up_read(&nfsi->rwsem);
9b073574 4094 goto out;
19e03c57
TM		 4095 }
4096 up_read(&nfsi->rwsem);
8d0a8a9d 4097 if (status != 0)
9b073574
TM		 4098 goto out;
4099 /* Is this a delegated lock? */
4100 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4101 goto out;
8d0a8a9d 4102 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4103 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4104 status = -ENOMEM;
911d1aaf 4105 if (seqid == NULL)
9b073574 4106 goto out;
cd3758e3 4107 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4108 status = PTR_ERR(task);
4109 if (IS_ERR(task))
9b073574 4110 goto out;
a5d16a4d 4111 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4112 rpc_put_task(task);
9b073574 4113out:
536ff0f8 4114 request->fl_flags = fl_flags;
1da177e4
LT		 4115 return status;
4116}
4117
a5d16a4d
TM		 4118struct nfs4_lockdata {
4119 struct nfs_lock_args arg;
4120 struct nfs_lock_res res;
4121 struct nfs4_lock_state *lsp;
4122 struct nfs_open_context *ctx;
4123 struct file_lock fl;
26e976a8 4124 unsigned long timestamp;
a5d16a4d
TM		 4125 int rpc_status;
4126 int cancelled;
66179efe 4127 struct nfs_server *server;
a5d16a4d
TM		 4128};
4129
4130static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4131 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4132 gfp_t gfp_mask)
1da177e4 4133{
a5d16a4d
TM		 4134 struct nfs4_lockdata *p;
4135 struct inode *inode = lsp->ls_state->inode;
1da177e4 4136 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4137
8535b2be 4138 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4139 if (p == NULL)
4140 return NULL;
4141
4142 p->arg.fh = NFS_FH(inode);
4143 p->arg.fl = &p->fl;
8535b2be 4144 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4145 if (p->arg.open_seqid == NULL)
4146 goto out_free;
8535b2be 4147 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4148 if (p->arg.lock_seqid == NULL)
2f74c0a0 4149 goto out_free_seqid;
a5d16a4d 4150 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4151 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4152 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4153 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4154 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4155 p->lsp = lsp;
66179efe 4156 p->server = server;
a5d16a4d
TM		 4157 atomic_inc(&lsp->ls_count);
4158 p->ctx = get_nfs_open_context(ctx);
4159 memcpy(&p->fl, fl, sizeof(p->fl));
4160 return p;
2f74c0a0
TM		 4161out_free_seqid:
4162 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4163out_free:
4164 kfree(p);
4165 return NULL;
4166}
4167
4168static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4169{
4170 struct nfs4_lockdata *data = calldata;
4171 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4172
3110ff80 4173 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4174 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4175 return;
a5d16a4d
TM		 4176 /* Do we need to do an open_to_lock_owner? */
4177 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4178 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4179 return;
a5d16a4d
TM		 4180 data->arg.open_stateid = &state->stateid;
4181 data->arg.new_lock_owner = 1;
c1d51931 4182 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4183 } else
4184 data->arg.new_lock_owner = 0;
26e976a8 4185 data->timestamp = jiffies;
035168ab
TM		 4186 if (nfs4_setup_sequence(data->server,
4187 &data->arg.seq_args,
66179efe
AA		 4188 &data->res.seq_res, 1, task))
4189 return;
5138fde0 4190 rpc_call_start(task);
3110ff80 4191 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4192}
4193
b257957e
AB		 4194static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4195{
4196 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4197 nfs4_lock_prepare(task, calldata);
4198}
4199
a5d16a4d
TM		 4200static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4201{
4202 struct nfs4_lockdata *data = calldata;
4203
3110ff80 4204 dprintk("%s: begin!\n", __func__);
a5d16a4d 4205
14516c3a
TM		 4206 if (!nfs4_sequence_done(task, &data->res.seq_res))
4207 return;
66179efe 4208
a5d16a4d 4209 data->rpc_status = task->tk_status;
a5d16a4d 4210 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4211 if (data->rpc_status == 0)
4212 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4213 else
4214 goto out;
4215 }
4216 if (data->rpc_status == 0) {
4217 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4218 sizeof(data->lsp->ls_stateid.data));
4219 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4220 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4221 }
a5d16a4d 4222out:
3110ff80 4223 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4224}
4225
4226static void nfs4_lock_release(void *calldata)
4227{
4228 struct nfs4_lockdata *data = calldata;
4229
3110ff80 4230 dprintk("%s: begin!\n", __func__);
2f74c0a0 4231 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4232 if (data->cancelled != 0) {
4233 struct rpc_task *task;
4234 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4235 data->arg.lock_seqid);
4236 if (!IS_ERR(task))
bf294b41 4237 rpc_put_task_async(task);
3110ff80 4238 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4239 } else
4240 nfs_free_seqid(data->arg.lock_seqid);
4241 nfs4_put_lock_state(data->lsp);
4242 put_nfs_open_context(data->ctx);
4243 kfree(data);
3110ff80 4244 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4245}
4246
4247static const struct rpc_call_ops nfs4_lock_ops = {
4248 .rpc_call_prepare = nfs4_lock_prepare,
4249 .rpc_call_done = nfs4_lock_done,
4250 .rpc_release = nfs4_lock_release,
4251};
4252
b257957e
AB		 4253static const struct rpc_call_ops nfs4_recover_lock_ops = {
4254 .rpc_call_prepare = nfs4_recover_lock_prepare,
4255 .rpc_call_done = nfs4_lock_done,
4256 .rpc_release = nfs4_lock_release,
4257};
4258
2bee72a6
TM		 4259static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4260{
2bee72a6
TM		 4261 switch (error) {
4262 case -NFS4ERR_ADMIN_REVOKED:
4263 case -NFS4ERR_BAD_STATEID:
ecac799a 4264 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4265 if (new_lock_owner != 0 ||
4266 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4267 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4268 break;
4269 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4270 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4271 case -NFS4ERR_EXPIRED:
4272 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4273 };
4274}
4275
afe6c27c 4276static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4277{
4278 struct nfs4_lockdata *data;
4279 struct rpc_task *task;
5138fde0
TM		 4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4282 .rpc_cred = state->owner->so_cred,
4283 };
c970aa85
TM		 4284 struct rpc_task_setup task_setup_data = {
4285 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4286 .rpc_message = &msg,
c970aa85 4287 .callback_ops = &nfs4_lock_ops,
101070ca 4288 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4289 .flags = RPC_TASK_ASYNC,
4290 };
a5d16a4d
TM		 4291 int ret;
4292
3110ff80 4293 dprintk("%s: begin!\n", __func__);
cd3758e3 4294 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4295 fl->fl_u.nfs4_fl.owner,
4296 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4297 if (data == NULL)
4298 return -ENOMEM;
4299 if (IS_SETLKW(cmd))
4300 data->arg.block = 1;
b257957e
AB		 4301 if (recovery_type > NFS_LOCK_NEW) {
4302 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4303 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4304 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4305 }
1174dd1f
TM		 4306 msg.rpc_argp = &data->arg;
4307 msg.rpc_resp = &data->res;
c970aa85
TM		 4308 task_setup_data.callback_data = data;
4309 task = rpc_run_task(&task_setup_data);
7a1218a2 4310 if (IS_ERR(task))
a5d16a4d 4311 return PTR_ERR(task);
a5d16a4d
TM		 4312 ret = nfs4_wait_for_completion_rpc_task(task);
4313 if (ret == 0) {
4314 ret = data->rpc_status;
2bee72a6
TM		 4315 if (ret)
4316 nfs4_handle_setlk_error(data->server, data->lsp,
4317 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4318 } else
4319 data->cancelled = 1;
e6b3c4db 4320 rpc_put_task(task);
3110ff80 4321 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4322 return ret;
1da177e4
LT		 4323}
4324
4325static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4326{
202b50dc
TM		 4327 struct nfs_server *server = NFS_SERVER(state->inode);
4328 struct nfs4_exception exception = { };
4329 int err;
4330
4331 do {
42a2d13e
TM		 4332 /* Cache the lock if possible... */
4333 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4334 return 0;
afe6c27c 4335 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4336 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4337 break;
4338 nfs4_handle_exception(server, err, &exception);
4339 } while (exception.retry);
4340 return err;
1da177e4
LT		 4341}
4342
4343static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4344{
202b50dc
TM		 4345 struct nfs_server *server = NFS_SERVER(state->inode);
4346 struct nfs4_exception exception = { };
4347 int err;
4348
6bfc93ef
TM		 4349 err = nfs4_set_lock_state(state, request);
4350 if (err != 0)
4351 return err;
202b50dc 4352 do {
42a2d13e
TM		 4353 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4354 return 0;
afe6c27c 4355 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4356 switch (err) {
4357 default:
4358 goto out;
4359 case -NFS4ERR_GRACE:
4360 case -NFS4ERR_DELAY:
4361 nfs4_handle_exception(server, err, &exception);
4362 err = 0;
4363 }
202b50dc 4364 } while (exception.retry);
a9ed2e25 4365out:
202b50dc 4366 return err;
1da177e4
LT		 4367}
4368
4369static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4370{
19e03c57 4371 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4372 unsigned char fl_flags = request->fl_flags;
8e469ebd 4373 int status = -ENOLCK;
1da177e4 4374
8e469ebd
TM		 4375 if ((fl_flags & FL_POSIX) &&
4376 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4377 goto out;
6bfc93ef 4378 /* Is this a delegated open? */
6bfc93ef
TM		 4379 status = nfs4_set_lock_state(state, request);
4380 if (status != 0)
4381 goto out;
01c3b861
TM		 4382 request->fl_flags |= FL_ACCESS;
4383 status = do_vfs_lock(request->fl_file, request);
4384 if (status < 0)
4385 goto out;
19e03c57 4386 down_read(&nfsi->rwsem);
01c3b861 4387 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4388 /* Yes: cache locks! */
01c3b861 4389 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4390 request->fl_flags = fl_flags & ~FL_SLEEP;
4391 status = do_vfs_lock(request->fl_file, request);
4392 goto out_unlock;
01c3b861 4393 }
afe6c27c 4394 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4395 if (status != 0)
01c3b861 4396 goto out_unlock;
6bfc93ef 4397 /* Note: we always want to sleep here! */
01c3b861 4398 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4399 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4400 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4401out_unlock:
19e03c57 4402 up_read(&nfsi->rwsem);
01c3b861
TM		 4403out:
4404 request->fl_flags = fl_flags;
1da177e4
LT		 4405 return status;
4406}
4407
4408static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4409{
4410 struct nfs4_exception exception = { };
4411 int err;
4412
4413 do {
965b5d67
TM		 4414 err = _nfs4_proc_setlk(state, cmd, request);
4415 if (err == -NFS4ERR_DENIED)
4416 err = -EAGAIN;
1da177e4 4417 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4418 err, &exception);
1da177e4
LT		 4419 } while (exception.retry);
4420 return err;
4421}
4422
4423static int
4424nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4425{
4426 struct nfs_open_context *ctx;
4427 struct nfs4_state *state;
4428 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4429 int status;
4430
4431 /* verify open state */
cd3758e3 4432 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4433 state = ctx->state;
4434
4435 if (request->fl_start < 0 || request->fl_end < 0)
4436 return -EINVAL;
4437
d953126a
TM		 4438 if (IS_GETLK(cmd)) {
4439 if (state != NULL)
4440 return nfs4_proc_getlk(state, F_GETLK, request);
4441 return 0;
4442 }
1da177e4
LT		 4443
4444 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4445 return -EINVAL;
4446
d953126a
TM		 4447 if (request->fl_type == F_UNLCK) {
4448 if (state != NULL)
4449 return nfs4_proc_unlck(state, cmd, request);
4450 return 0;
4451 }
1da177e4 4452
d953126a
TM		 4453 if (state == NULL)
4454 return -ENOLCK;
1da177e4
LT		 4455 do {
4456 status = nfs4_proc_setlk(state, cmd, request);
4457 if ((status != -EAGAIN) || IS_SETLK(cmd))
4458 break;
4459 timeout = nfs4_set_lock_task_retry(timeout);
4460 status = -ERESTARTSYS;
4461 if (signalled())
4462 break;
4463 } while(status < 0);
1da177e4
LT		 4464 return status;
4465}
4466
888e694c
TM		 4467int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4468{
4469 struct nfs_server *server = NFS_SERVER(state->inode);
4470 struct nfs4_exception exception = { };
4471 int err;
4472
4473 err = nfs4_set_lock_state(state, fl);
4474 if (err != 0)
4475 goto out;
4476 do {
afe6c27c 4477 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4478 switch (err) {
4479 default:
4480 printk(KERN_ERR "%s: unhandled error %d.\n",
4481 __func__, err);
4482 case 0:
965b5d67 4483 case -ESTALE:
d5122201
TM		 4484 goto out;
4485 case -NFS4ERR_EXPIRED:
4486 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4487 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4488 nfs4_schedule_lease_recovery(server->nfs_client);
4489 goto out;
74e7bb73
RL		 4490 case -NFS4ERR_BADSESSION:
4491 case -NFS4ERR_BADSLOT:
4492 case -NFS4ERR_BAD_HIGH_SLOT:
4493 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4494 case -NFS4ERR_DEADSESSION:
0400a6b0 4495 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4496 goto out;
965b5d67
TM		 4497 case -ERESTARTSYS:
4498 /*
4499 * The show must go on: exit, but mark the
4500 * stateid as needing recovery.
4501 */
4502 case -NFS4ERR_ADMIN_REVOKED:
4503 case -NFS4ERR_BAD_STATEID:
4504 case -NFS4ERR_OPENMODE:
0400a6b0 4505 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4506 err = 0;
4507 goto out;
168667c4
TM		 4508 case -EKEYEXPIRED:
4509 /*
4510 * User RPCSEC_GSS context has expired.
4511 * We cannot recover this stateid now, so
4512 * skip it and allow recovery thread to
4513 * proceed.
4514 */
4515 err = 0;
4516 goto out;
965b5d67
TM		 4517 case -ENOMEM:
4518 case -NFS4ERR_DENIED:
4519 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4520 err = 0;
4521 goto out;
d5122201
TM		 4522 case -NFS4ERR_DELAY:
4523 break;
4524 }
888e694c
TM		 4525 err = nfs4_handle_exception(server, err, &exception);
4526 } while (exception.retry);
4527out:
4528 return err;
4529}
6b3b5496 4530
d3c7b7cc
TM		 4531static void nfs4_release_lockowner_release(void *calldata)
4532{
4533 kfree(calldata);
4534}
4535
4536const struct rpc_call_ops nfs4_release_lockowner_ops = {
4537 .rpc_release = nfs4_release_lockowner_release,
4538};
4539
4540void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4541{
4542 struct nfs_server *server = lsp->ls_state->owner->so_server;
4543 struct nfs_release_lockowner_args *args;
4544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4546 };
4547
4548 if (server->nfs_client->cl_mvops->minor_version != 0)
4549 return;
4550 args = kmalloc(sizeof(*args), GFP_NOFS);
4551 if (!args)
4552 return;
4553 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4554 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4555 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4556 msg.rpc_argp = args;
4557 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4558}
4559
aa1870af
BF		 4560#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4561
64c2ce8b
AK		 4562static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4563 const void *buf, size_t buflen,
4564 int flags, int type)
6b3b5496 4565{
64c2ce8b
AK		 4566 if (strcmp(key, "") != 0)
4567 return -EINVAL;
4b580ee3 4568
64c2ce8b 4569 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4570}
4571
64c2ce8b
AK		 4572static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4573 void *buf, size_t buflen, int type)
6b3b5496 4574{
64c2ce8b
AK		 4575 if (strcmp(key, "") != 0)
4576 return -EINVAL;
aa1870af 4577
64c2ce8b 4578 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4579}
4580
64c2ce8b
AK		 4581static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4582 size_t list_len, const char *name,
4583 size_t name_len, int type)
6b3b5496 4584{
64c2ce8b 4585 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4586
096455a2
BF		 4587 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4588 return 0;
64c2ce8b
AK		 4589
4590 if (list && len <= list_len)
4591 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4592 return len;
6b3b5496
BF		 4593}
4594
69aaaae1
TM		 4595static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4596{
4597 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4598 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4599 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4600 return;
4601
4602 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4603 NFS_ATTR_FATTR_NLINK;
4604 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4605 fattr->nlink = 2;
4606}
4607
56659e99 4608int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4609 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4610{
4611 struct nfs_server *server = NFS_SERVER(dir);
4612 u32 bitmask[2] = {
361e624f
MN		 4613 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4614 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4615 };
4616 struct nfs4_fs_locations_arg args = {
4617 .dir_fh = NFS_FH(dir),
c228fd3a 4618 .name = name,
683b57b4
TM		 4619 .page = page,
4620 .bitmask = bitmask,
4621 };
22958463
BH		 4622 struct nfs4_fs_locations_res res = {
4623 .fs_locations = fs_locations,
4624 };
683b57b4
TM		 4625 struct rpc_message msg = {
4626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4627 .rpc_argp = &args,
22958463 4628 .rpc_resp = &res,
683b57b4
TM		 4629 };
4630 int status;
4631
3110ff80 4632 dprintk("%s: start\n", __func__);
c228fd3a 4633 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4634 fs_locations->server = server;
830b8e33 4635 fs_locations->nlocations = 0;
7c513058 4636 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
69aaaae1 4637 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4638 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4639 return status;
4640}
4641
557134a3 4642#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4643/*
4644 * Check the exchange flags returned by the server for invalid flags, having
4645 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4646 * DS flags set.
4647 */
4648static int nfs4_check_cl_exchange_flags(u32 flags)
4649{
4650 if (flags & ~EXCHGID4_FLAG_MASK_R)
4651 goto out_inval;
4652 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4653 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4654 goto out_inval;
4655 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4656 goto out_inval;
4657 return NFS_OK;
4658out_inval:
4659 return -NFS4ERR_INVAL;
4660}
4661
99fe60d0
BH		 4662/*
4663 * nfs4_proc_exchange_id()
4664 *
4665 * Since the clientid has expired, all compounds using sessions
4666 * associated with the stale clientid will be returning
4667 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4668 * be in some phase of session reset.
4669 */
4d643d1d 4670int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4671{
4672 nfs4_verifier verifier;
4673 struct nfs41_exchange_id_args args = {
4674 .client = clp,
357f54d6 4675 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4676 };
4677 struct nfs41_exchange_id_res res = {
4678 .client = clp,
4679 };
4680 int status;
4681 struct rpc_message msg = {
4682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4683 .rpc_argp = &args,
4684 .rpc_resp = &res,
4685 .rpc_cred = cred,
4686 };
4687 __be32 *p;
4688
4689 dprintk("--> %s\n", __func__);
4690 BUG_ON(clp == NULL);
a7b72103 4691
99fe60d0
BH		 4692 p = (u32 *)verifier.data;
4693 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4694 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4695 args.verifier = &verifier;
4696
c7a360b0
AA		 4697 args.id_len = scnprintf(args.id, sizeof(args.id),
4698 "%s/%s.%s/%u",
4699 clp->cl_ipaddr,
4700 init_utsname()->nodename,
4701 init_utsname()->domainname,
4702 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4703
c7a360b0
AA		 4704 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4705 if (!status)
4706 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4707 dprintk("<-- %s status= %d\n", __func__, status);
4708 return status;
4709}
4710
2050f0cc
AA		 4711struct nfs4_get_lease_time_data {
4712 struct nfs4_get_lease_time_args *args;
4713 struct nfs4_get_lease_time_res *res;
4714 struct nfs_client *clp;
4715};
4716
4717static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4718 void *calldata)
4719{
4720 int ret;
4721 struct nfs4_get_lease_time_data *data =
4722 (struct nfs4_get_lease_time_data *)calldata;
4723
4724 dprintk("--> %s\n", __func__);
689cf5c1 4725 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4726 /* just setup sequence, do not trigger session recovery
4727 since we're invoked within one */
4728 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4729 &data->args->la_seq_args,
4730 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4731
4732 BUG_ON(ret == -EAGAIN);
4733 rpc_call_start(task);
4734 dprintk("<-- %s\n", __func__);
4735}
4736
4737/*
4738 * Called from nfs4_state_manager thread for session setup, so don't recover
4739 * from sequence operation or clientid errors.
4740 */
4741static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4742{
4743 struct nfs4_get_lease_time_data *data =
4744 (struct nfs4_get_lease_time_data *)calldata;
4745
4746 dprintk("--> %s\n", __func__);
14516c3a
TM		 4747 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4748 return;
2050f0cc
AA		 4749 switch (task->tk_status) {
4750 case -NFS4ERR_DELAY:
4751 case -NFS4ERR_GRACE:
4752 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4753 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4754 task->tk_status = 0;
0110ee15 4755 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4756 return;
4757 }
2050f0cc
AA		 4758 dprintk("<-- %s\n", __func__);
4759}
4760
4761struct rpc_call_ops nfs4_get_lease_time_ops = {
4762 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4763 .rpc_call_done = nfs4_get_lease_time_done,
4764};
4765
4766int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4767{
4768 struct rpc_task *task;
4769 struct nfs4_get_lease_time_args args;
4770 struct nfs4_get_lease_time_res res = {
4771 .lr_fsinfo = fsinfo,
4772 };
4773 struct nfs4_get_lease_time_data data = {
4774 .args = &args,
4775 .res = &res,
4776 .clp = clp,
4777 };
4778 struct rpc_message msg = {
4779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4780 .rpc_argp = &args,
4781 .rpc_resp = &res,
4782 };
4783 struct rpc_task_setup task_setup = {
4784 .rpc_client = clp->cl_rpcclient,
4785 .rpc_message = &msg,
4786 .callback_ops = &nfs4_get_lease_time_ops,
4787 .callback_data = &data
4788 };
4789 int status;
4790
2050f0cc
AA		 4791 dprintk("--> %s\n", __func__);
4792 task = rpc_run_task(&task_setup);
4793
4794 if (IS_ERR(task))
4795 status = PTR_ERR(task);
4796 else {
4797 status = task->tk_status;
4798 rpc_put_task(task);
4799 }
4800 dprintk("<-- %s return %d\n", __func__, status);
4801
4802 return status;
4803}
4804
b73dafa7
RL		 4805/*
4806 * Reset a slot table
4807 */
104aeba4
AA		 4808static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4809 int ivalue)
ac72b7b3 4810{
104aeba4 4811 struct nfs4_slot *new = NULL;
b73dafa7 4812 int i;
ac72b7b3
AA		 4813 int ret = 0;
4814
104aeba4
AA		 4815 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4816 max_reqs, tbl->max_slots);
ac72b7b3 4817
104aeba4
AA		 4818 /* Does the newly negotiated max_reqs match the existing slot table? */
4819 if (max_reqs != tbl->max_slots) {
4820 ret = -ENOMEM;
4821 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4822 GFP_NOFS);
104aeba4
AA		 4823 if (!new)
4824 goto out;
4825 ret = 0;
4826 kfree(tbl->slots);
ac72b7b3
AA		 4827 }
4828 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4829 if (new) {
4830 tbl->slots = new;
4831 tbl->max_slots = max_reqs;
4832 }
4833 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4834 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4835 spin_unlock(&tbl->slot_tbl_lock);
4836 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4837 tbl, tbl->slots, tbl->max_slots);
4838out:
4839 dprintk("<-- %s: return %d\n", __func__, ret);
4840 return ret;
4841}
4842
b73dafa7
RL		 4843/*
4844 * Reset the forechannel and backchannel slot tables
4845 */
4846static int nfs4_reset_slot_tables(struct nfs4_session *session)
4847{
4848 int status;
4849
4850 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4851 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4852 if (status)
4853 return status;
4854
4855 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4856 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4857 return status;
4858}
4859
f8625a6a
RL		 4860/* Destroy the slot table */
4861static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4862{
4863 if (session->fc_slot_table.slots != NULL) {
4864 kfree(session->fc_slot_table.slots);
4865 session->fc_slot_table.slots = NULL;
4866 }
4867 if (session->bc_slot_table.slots != NULL) {
4868 kfree(session->bc_slot_table.slots);
4869 session->bc_slot_table.slots = NULL;
4870 }
4871 return;
4872}
4873
fc931582
AA		 4874/*
4875 * Initialize slot table
4876 */
050047ce
RL		 4877static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4878 int max_slots, int ivalue)
fc931582 4879{
fc931582
AA		 4880 struct nfs4_slot *slot;
4881 int ret = -ENOMEM;
4882
4883 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4884
050047ce 4885 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4886
8535b2be 4887 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4888 if (!slot)
4889 goto out;
fc931582
AA		 4890 ret = 0;
4891
4892 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4893 tbl->max_slots = max_slots;
4894 tbl->slots = slot;
4895 tbl->highest_used_slotid = -1; /* no slot is currently used */
4896 spin_unlock(&tbl->slot_tbl_lock);
4897 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4898 tbl, tbl->slots, tbl->max_slots);
4899out:
4900 dprintk("<-- %s: return %d\n", __func__, ret);
4901 return ret;
fc931582
AA		 4902}
4903
050047ce
RL		 4904/*
4905 * Initialize the forechannel and backchannel tables
4906 */
4907static int nfs4_init_slot_tables(struct nfs4_session *session)
4908{
f26468fb
TM		 4909 struct nfs4_slot_table *tbl;
4910 int status = 0;
050047ce 4911
f26468fb
TM		 4912 tbl = &session->fc_slot_table;
4913 if (tbl->slots == NULL) {
4914 status = nfs4_init_slot_table(tbl,
4915 session->fc_attrs.max_reqs, 1);
4916 if (status)
4917 return status;
4918 }
050047ce 4919
f26468fb
TM		 4920 tbl = &session->bc_slot_table;
4921 if (tbl->slots == NULL) {
4922 status = nfs4_init_slot_table(tbl,
4923 session->bc_attrs.max_reqs, 0);
4924 if (status)
4925 nfs4_destroy_slot_tables(session);
4926 }
f8625a6a
RL		 4927
4928 return status;
557134a3
AA		 4929}
4930
4931struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4932{
4933 struct nfs4_session *session;
4934 struct nfs4_slot_table *tbl;
4935
8535b2be 4936 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 4937 if (!session)
4938 return NULL;
76db6d95 4939
557134a3 4940 tbl = &session->fc_slot_table;
9dfdf404 4941 tbl->highest_used_slotid = -1;
557134a3 4942 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 4943 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 4944 init_completion(&tbl->complete);
f8625a6a
RL		 4945
4946 tbl = &session->bc_slot_table;
9dfdf404 4947 tbl->highest_used_slotid = -1;
f8625a6a
RL		 4948 spin_lock_init(&tbl->slot_tbl_lock);
4949 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 4950 init_completion(&tbl->complete);
f8625a6a 4951
1055d76d
TM		 4952 session->session_state = 1<<NFS4_SESSION_INITING;
4953
557134a3
AA		 4954 session->clp = clp;
4955 return session;
4956}
4957
4958void nfs4_destroy_session(struct nfs4_session *session)
4959{
5a0ffe54
AA		 4960 nfs4_proc_destroy_session(session);
4961 dprintk("%s Destroy backchannel for xprt %p\n",
4962 __func__, session->clp->cl_rpcclient->cl_xprt);
4963 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4964 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4965 nfs4_destroy_slot_tables(session);
557134a3
AA		 4966 kfree(session);
4967}
4968
fc931582
AA		 4969/*
4970 * Initialize the values to be used by the client in CREATE_SESSION
4971 * If nfs4_init_session set the fore channel request and response sizes,
4972 * use them.
4973 *
4974 * Set the back channel max_resp_sz_cached to zero to force the client to
4975 * always set csa_cachethis to FALSE because the current implementation
4976 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4977 */
4978static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4979{
4980 struct nfs4_session *session = args->client->cl_session;
4981 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4982 mxresp_sz = session->fc_attrs.max_resp_sz;
4983
4984 if (mxrqst_sz == 0)
4985 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4986 if (mxresp_sz == 0)
4987 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4988 /* Fore channel attributes */
4989 args->fc_attrs.headerpadsz = 0;
4990 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4991 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 4992 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4993 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4994
4995 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 4996 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 4997 __func__,
4998 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 4999 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5000
5001 /* Back channel attributes */
5002 args->bc_attrs.headerpadsz = 0;
5003 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5004 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5005 args->bc_attrs.max_resp_sz_cached = 0;
5006 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5007 args->bc_attrs.max_reqs = 1;
5008
5009 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5010 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5011 __func__,
5012 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5013 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5014 args->bc_attrs.max_reqs);
5015}
5016
43c2e885 5017static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5018{
43c2e885
BF		 5019 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5020 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5021
5022 if (rcvd->headerpadsz > sent->headerpadsz)
5023 return -EINVAL;
5024 if (rcvd->max_resp_sz > sent->max_resp_sz)
5025 return -EINVAL;
5026 /*
5027 * Our requested max_ops is the minimum we need; we're not
5028 * prepared to break up compounds into smaller pieces than that.
5029 * So, no point even trying to continue if the server won't
5030 * cooperate:
5031 */
5032 if (rcvd->max_ops < sent->max_ops)
5033 return -EINVAL;
5034 if (rcvd->max_reqs == 0)
5035 return -EINVAL;
5036 return 0;
8d35301d
AA		 5037}
5038
43c2e885
BF		 5039static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5040{
5041 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5042 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5043
43c2e885
BF		 5044 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5045 return -EINVAL;
5046 if (rcvd->max_resp_sz < sent->max_resp_sz)
5047 return -EINVAL;
5048 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5049 return -EINVAL;
5050 /* These would render the backchannel useless: */
5051 if (rcvd->max_ops == 0)
5052 return -EINVAL;
5053 if (rcvd->max_reqs == 0)
5054 return -EINVAL;
5055 return 0;
5056}
8d35301d 5057
8d35301d
AA		 5058static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5059 struct nfs4_session *session)
5060{
43c2e885 5061 int ret;
8d35301d 5062
43c2e885
BF		 5063 ret = nfs4_verify_fore_channel_attrs(args, session);
5064 if (ret)
5065 return ret;
5066 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5067}
5068
fc931582
AA		 5069static int _nfs4_proc_create_session(struct nfs_client *clp)
5070{
5071 struct nfs4_session *session = clp->cl_session;
5072 struct nfs41_create_session_args args = {
5073 .client = clp,
5074 .cb_program = NFS4_CALLBACK,
5075 };
5076 struct nfs41_create_session_res res = {
5077 .client = clp,
5078 };
5079 struct rpc_message msg = {
5080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5081 .rpc_argp = &args,
5082 .rpc_resp = &res,
5083 };
5084 int status;
5085
5086 nfs4_init_channel_attrs(&args);
0f91421e 5087 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 5088
5089 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5090
8d35301d
AA		 5091 if (!status)
5092 /* Verify the session's negotiated channel_attrs values */
5093 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5094 if (!status) {
5095 /* Increment the clientid slot sequence id */
5096 clp->cl_seqid++;
5097 }
5098
5099 return status;
5100}
5101
5102/*
5103 * Issues a CREATE_SESSION operation to the server.
5104 * It is the responsibility of the caller to verify the session is
5105 * expired before calling this routine.
5106 */
f26468fb 5107int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5108{
5109 int status;
5110 unsigned *ptr;
fc931582 5111 struct nfs4_session *session = clp->cl_session;
7d6d63d6
RL		 5112 long timeout = 0;
5113 int err;
fc931582
AA		 5114
5115 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5116
7d6d63d6
RL		 5117 do {
5118 status = _nfs4_proc_create_session(clp);
5119 if (status == -NFS4ERR_DELAY) {
5120 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5121 if (err)
5122 status = err;
5123 }
5124 } while (status == -NFS4ERR_DELAY);
5125
fc931582
AA		 5126 if (status)
5127 goto out;
5128
f26468fb
TM		 5129 /* Init and reset the fore channel */
5130 status = nfs4_init_slot_tables(session);
5131 dprintk("slot table initialization returned %d\n", status);
5132 if (status)
5133 goto out;
5134 status = nfs4_reset_slot_tables(session);
5135 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5136 if (status)
5137 goto out;
5138
5139 ptr = (unsigned *)&session->sess_id.data[0];
5140 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5141 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5142out:
5143 dprintk("<-- %s\n", __func__);
5144 return status;
5145}
5146
0f3e66c6
AA		 5147/*
5148 * Issue the over-the-wire RPC DESTROY_SESSION.
5149 * The caller must serialize access to this routine.
5150 */
5151int nfs4_proc_destroy_session(struct nfs4_session *session)
5152{
5153 int status = 0;
5154 struct rpc_message msg;
5155
5156 dprintk("--> nfs4_proc_destroy_session\n");
5157
5158 /* session is still being setup */
5159 if (session->clp->cl_cons_state != NFS_CS_READY)
5160 return status;
5161
5162 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5163 msg.rpc_argp = session;
5164 msg.rpc_resp = NULL;
5165 msg.rpc_cred = NULL;
5166 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5167
5168 if (status)
5169 printk(KERN_WARNING
5170 "Got error %d from the server on DESTROY_SESSION. "
5171 "Session has been destroyed regardless...\n", status);
5172
5173 dprintk("<-- nfs4_proc_destroy_session\n");
5174 return status;
5175}
5176
fccba804
TM		 5177int nfs4_init_session(struct nfs_server *server)
5178{
5179 struct nfs_client *clp = server->nfs_client;
2449ea2e 5180 struct nfs4_session *session;
68bf05ef 5181 unsigned int rsize, wsize;
fccba804
TM		 5182 int ret;
5183
5184 if (!nfs4_has_session(clp))
5185 return 0;
5186
1055d76d
TM		 5187 session = clp->cl_session;
5188 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5189 return 0;
5190
68bf05ef
AA		 5191 rsize = server->rsize;
5192 if (rsize == 0)
5193 rsize = NFS_MAX_FILE_IO_SIZE;
5194 wsize = server->wsize;
5195 if (wsize == 0)
5196 wsize = NFS_MAX_FILE_IO_SIZE;
5197
68bf05ef
AA		 5198 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5199 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5200
fccba804
TM		 5201 ret = nfs4_recover_expired_lease(server);
5202 if (!ret)
5203 ret = nfs4_check_client_ready(clp);
5204 return ret;
5205}
5206
d83217c1
AA		 5207int nfs4_init_ds_session(struct nfs_client *clp)
5208{
5209 struct nfs4_session *session = clp->cl_session;
5210 int ret;
5211
5212 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5213 return 0;
5214
5215 ret = nfs4_client_recover_expired_lease(clp);
5216 if (!ret)
5217 /* Test for the DS role */
5218 if (!is_ds_client(clp))
5219 ret = -ENODEV;
5220 if (!ret)
5221 ret = nfs4_check_client_ready(clp);
5222 return ret;
5223
5224}
5225EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5226
5227
fc01cea9
AA		 5228/*
5229 * Renew the cl_session lease.
5230 */
d5f8d3fe
TM		 5231struct nfs4_sequence_data {
5232 struct nfs_client *clp;
5233 struct nfs4_sequence_args args;
5234 struct nfs4_sequence_res res;
5235};
5236
dc96aef9
AB		 5237static void nfs41_sequence_release(void *data)
5238{
d5f8d3fe
TM		 5239 struct nfs4_sequence_data *calldata = data;
5240 struct nfs_client *clp = calldata->clp;
dc96aef9 5241
7135840f
AB		 5242 if (atomic_read(&clp->cl_count) > 1)
5243 nfs4_schedule_state_renewal(clp);
5244 nfs_put_client(clp);
d5f8d3fe 5245 kfree(calldata);
dc96aef9
AB		 5246}
5247
aa5190d0
TM		 5248static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5249{
5250 switch(task->tk_status) {
5251 case -NFS4ERR_DELAY:
aa5190d0
TM		 5252 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5253 return -EAGAIN;
5254 default:
0400a6b0 5255 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5256 }
5257 return 0;
5258}
5259
dc96aef9 5260static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5261{
d5f8d3fe
TM		 5262 struct nfs4_sequence_data *calldata = data;
5263 struct nfs_client *clp = calldata->clp;
fc01cea9 5264
14516c3a
TM		 5265 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5266 return;
fc01cea9
AA		 5267
5268 if (task->tk_status < 0) {
5269 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5270 if (atomic_read(&clp->cl_count) == 1)
5271 goto out;
fc01cea9 5272
aa5190d0
TM		 5273 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5274 rpc_restart_call_prepare(task);
fc01cea9
AA		 5275 return;
5276 }
5277 }
fc01cea9 5278 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5279out:
fc01cea9
AA		 5280 dprintk("<-- %s\n", __func__);
5281}
5282
5283static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5284{
d5f8d3fe
TM		 5285 struct nfs4_sequence_data *calldata = data;
5286 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5287 struct nfs4_sequence_args *args;
5288 struct nfs4_sequence_res *res;
5289
fc01cea9
AA		 5290 args = task->tk_msg.rpc_argp;
5291 res = task->tk_msg.rpc_resp;
5292
035168ab 5293 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5294 return;
5295 rpc_call_start(task);
5296}
5297
5298static const struct rpc_call_ops nfs41_sequence_ops = {
5299 .rpc_call_done = nfs41_sequence_call_done,
5300 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5301 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5302};
5303
71ac6da9 5304static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5305{
d5f8d3fe 5306 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5307 struct rpc_message msg = {
5308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5309 .rpc_cred = cred,
5310 };
71ac6da9
TM		 5311 struct rpc_task_setup task_setup_data = {
5312 .rpc_client = clp->cl_rpcclient,
5313 .rpc_message = &msg,
5314 .callback_ops = &nfs41_sequence_ops,
5315 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5316 };
fc01cea9 5317
7135840f 5318 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5319 return ERR_PTR(-EIO);
dfb4f309 5320 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5321 if (calldata == NULL) {
7135840f 5322 nfs_put_client(clp);
71ac6da9 5323 return ERR_PTR(-ENOMEM);
fc01cea9 5324 }
d5f8d3fe
TM		 5325 msg.rpc_argp = &calldata->args;
5326 msg.rpc_resp = &calldata->res;
5327 calldata->clp = clp;
71ac6da9 5328 task_setup_data.callback_data = calldata;
fc01cea9 5329
71ac6da9
TM		 5330 return rpc_run_task(&task_setup_data);
5331}
5332
5333static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5334{
5335 struct rpc_task *task;
5336 int ret = 0;
5337
5338 task = _nfs41_proc_sequence(clp, cred);
5339 if (IS_ERR(task))
5340 ret = PTR_ERR(task);
5341 else
bf294b41 5342 rpc_put_task_async(task);
71ac6da9
TM		 5343 dprintk("<-- %s status=%d\n", __func__, ret);
5344 return ret;
5345}
5346
5347static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5348{
5349 struct rpc_task *task;
5350 int ret;
5351
5352 task = _nfs41_proc_sequence(clp, cred);
5353 if (IS_ERR(task)) {
5354 ret = PTR_ERR(task);
5355 goto out;
5356 }
5357 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5358 if (!ret) {
5359 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5360
5361 if (task->tk_status == 0)
5362 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5363 ret = task->tk_status;
b4410c2f 5364 }
71ac6da9
TM		 5365 rpc_put_task(task);
5366out:
5367 dprintk("<-- %s status=%d\n", __func__, ret);
5368 return ret;
fc01cea9
AA		 5369}
5370
fce5c838
RL		 5371struct nfs4_reclaim_complete_data {
5372 struct nfs_client *clp;
5373 struct nfs41_reclaim_complete_args arg;
5374 struct nfs41_reclaim_complete_res res;
5375};
5376
5377static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5378{
5379 struct nfs4_reclaim_complete_data *calldata = data;
5380
b257957e 5381 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5382 if (nfs41_setup_sequence(calldata->clp->cl_session,
5383 &calldata->arg.seq_args,
fce5c838
RL		 5384 &calldata->res.seq_res, 0, task))
5385 return;
5386
5387 rpc_call_start(task);
5388}
5389
aa5190d0
TM		 5390static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5391{
5392 switch(task->tk_status) {
5393 case 0:
5394 case -NFS4ERR_COMPLETE_ALREADY:
5395 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5396 break;
5397 case -NFS4ERR_DELAY:
aa5190d0
TM		 5398 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5399 return -EAGAIN;
5400 default:
0400a6b0 5401 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5402 }
5403 return 0;
5404}
5405
fce5c838
RL		 5406static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5407{
5408 struct nfs4_reclaim_complete_data *calldata = data;
5409 struct nfs_client *clp = calldata->clp;
5410 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5411
5412 dprintk("--> %s\n", __func__);
14516c3a
TM		 5413 if (!nfs41_sequence_done(task, res))
5414 return;
fce5c838 5415
aa5190d0
TM		 5416 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5417 rpc_restart_call_prepare(task);
5418 return;
5419 }
fce5c838
RL		 5420 dprintk("<-- %s\n", __func__);
5421}
5422
5423static void nfs4_free_reclaim_complete_data(void *data)
5424{
5425 struct nfs4_reclaim_complete_data *calldata = data;
5426
5427 kfree(calldata);
5428}
5429
5430static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5431 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5432 .rpc_call_done = nfs4_reclaim_complete_done,
5433 .rpc_release = nfs4_free_reclaim_complete_data,
5434};
5435
5436/*
5437 * Issue a global reclaim complete.
5438 */
5439static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5440{
5441 struct nfs4_reclaim_complete_data *calldata;
5442 struct rpc_task *task;
5443 struct rpc_message msg = {
5444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5445 };
5446 struct rpc_task_setup task_setup_data = {
5447 .rpc_client = clp->cl_rpcclient,
5448 .rpc_message = &msg,
5449 .callback_ops = &nfs4_reclaim_complete_call_ops,
5450 .flags = RPC_TASK_ASYNC,
5451 };
5452 int status = -ENOMEM;
5453
5454 dprintk("--> %s\n", __func__);
8535b2be 5455 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5456 if (calldata == NULL)
5457 goto out;
5458 calldata->clp = clp;
5459 calldata->arg.one_fs = 0;
fce5c838
RL		 5460
5461 msg.rpc_argp = &calldata->arg;
5462 msg.rpc_resp = &calldata->res;
5463 task_setup_data.callback_data = calldata;
5464 task = rpc_run_task(&task_setup_data);
acf82b85 5465 if (IS_ERR(task)) {
fce5c838 5466 status = PTR_ERR(task);
acf82b85
DC		 5467 goto out;
5468 }
c34c32ea
AA		 5469 status = nfs4_wait_for_completion_rpc_task(task);
5470 if (status == 0)
5471 status = task->tk_status;
fce5c838 5472 rpc_put_task(task);
acf82b85 5473 return 0;
fce5c838
RL		 5474out:
5475 dprintk("<-- %s status=%d\n", __func__, status);
5476 return status;
5477}
b1f69b75
AA		 5478
5479static void
5480nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5481{
5482 struct nfs4_layoutget *lgp = calldata;
c31663d4 5483 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5484
5485 dprintk("--> %s\n", __func__);
c31663d4
FI		 5486 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5487 * right now covering the LAYOUTGET we are about to send.
5488 * However, that is not so catastrophic, and there seems
5489 * to be no way to prevent it completely.
5490 */
b1f69b75
AA		 5491 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5492 &lgp->res.seq_res, 0, task))
5493 return;
cf7d63f1
FI		 5494 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5495 NFS_I(lgp->args.inode)->layout,
5496 lgp->args.ctx->state)) {
5497 rpc_exit(task, NFS4_OK);
5498 return;
5499 }
b1f69b75
AA		 5500 rpc_call_start(task);
5501}
5502
5503static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5504{
5505 struct nfs4_layoutget *lgp = calldata;
5506 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5507
5508 dprintk("--> %s\n", __func__);
5509
5510 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5511 return;
5512
5513 switch (task->tk_status) {
5514 case 0:
5515 break;
5516 case -NFS4ERR_LAYOUTTRYLATER:
5517 case -NFS4ERR_RECALLCONFLICT:
5518 task->tk_status = -NFS4ERR_DELAY;
5519 /* Fall through */
5520 default:
5521 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5522 rpc_restart_call_prepare(task);
5523 return;
5524 }
5525 }
b1f69b75
AA		 5526 dprintk("<-- %s\n", __func__);
5527}
5528
5529static void nfs4_layoutget_release(void *calldata)
5530{
5531 struct nfs4_layoutget *lgp = calldata;
5532
5533 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5534 if (lgp->res.layout.buf != NULL)
5535 free_page((unsigned long) lgp->res.layout.buf);
5536 put_nfs_open_context(lgp->args.ctx);
5537 kfree(calldata);
5538 dprintk("<-- %s\n", __func__);
5539}
5540
5541static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5542 .rpc_call_prepare = nfs4_layoutget_prepare,
5543 .rpc_call_done = nfs4_layoutget_done,
5544 .rpc_release = nfs4_layoutget_release,
5545};
5546
5547int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5548{
5549 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5550 struct rpc_task *task;
5551 struct rpc_message msg = {
5552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5553 .rpc_argp = &lgp->args,
5554 .rpc_resp = &lgp->res,
5555 };
5556 struct rpc_task_setup task_setup_data = {
5557 .rpc_client = server->client,
5558 .rpc_message = &msg,
5559 .callback_ops = &nfs4_layoutget_call_ops,
5560 .callback_data = lgp,
5561 .flags = RPC_TASK_ASYNC,
5562 };
5563 int status = 0;
5564
5565 dprintk("--> %s\n", __func__);
5566
5567 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5568 if (lgp->res.layout.buf == NULL) {
5569 nfs4_layoutget_release(lgp);
5570 return -ENOMEM;
5571 }
5572
5573 lgp->res.seq_res.sr_slot = NULL;
5574 task = rpc_run_task(&task_setup_data);
5575 if (IS_ERR(task))
5576 return PTR_ERR(task);
5577 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5578 if (status == 0)
5579 status = task->tk_status;
5580 if (status == 0)
5581 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5582 rpc_put_task(task);
5583 dprintk("<-- %s status=%d\n", __func__, status);
5584 return status;
5585}
5586
5587static int
5588_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5589{
5590 struct nfs4_getdeviceinfo_args args = {
5591 .pdev = pdev,
5592 };
5593 struct nfs4_getdeviceinfo_res res = {
5594 .pdev = pdev,
5595 };
5596 struct rpc_message msg = {
5597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5598 .rpc_argp = &args,
5599 .rpc_resp = &res,
5600 };
5601 int status;
5602
5603 dprintk("--> %s\n", __func__);
7c513058 5604 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5605 dprintk("<-- %s status=%d\n", __func__, status);
5606
5607 return status;
5608}
5609
5610int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5611{
5612 struct nfs4_exception exception = { };
5613 int err;
5614
5615 do {
5616 err = nfs4_handle_exception(server,
5617 _nfs4_proc_getdeviceinfo(server, pdev),
5618 &exception);
5619 } while (exception.retry);
5620 return err;
5621}
5622EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5623
557134a3
AA		 5624#endif /* CONFIG_NFS_V4_1 */
5625
591d71cb 5626struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5627 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5628 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5629 .recover_open = nfs4_open_reclaim,
5630 .recover_lock = nfs4_lock_reclaim,
591d71cb 5631 .establish_clid = nfs4_init_clientid,
90a16617 5632 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5633};
5634
591d71cb
AA		 5635#if defined(CONFIG_NFS_V4_1)
5636struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5637 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5638 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5639 .recover_open = nfs4_open_reclaim,
5640 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5641 .establish_clid = nfs41_init_clientid,
b4b82607 5642 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5643 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5644};
5645#endif /* CONFIG_NFS_V4_1 */
5646
5647struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5648 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5649 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5650 .recover_open = nfs4_open_expired,
5651 .recover_lock = nfs4_lock_expired,
5652 .establish_clid = nfs4_init_clientid,
90a16617 5653 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5654};
5655
5656#if defined(CONFIG_NFS_V4_1)
5657struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5658 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5659 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5660 .recover_open = nfs4_open_expired,
5661 .recover_lock = nfs4_lock_expired,
4d643d1d 5662 .establish_clid = nfs41_init_clientid,
b4b82607 5663 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5664};
591d71cb 5665#endif /* CONFIG_NFS_V4_1 */
1da177e4 5666
29fba38b
BH		 5667struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5668 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5669 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5670 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5671};
5672
5673#if defined(CONFIG_NFS_V4_1)
5674struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5675 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5676 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5677 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5678};
5679#endif
5680
97dc1359
TM		 5681static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5682 .minor_version = 0,
5683 .call_sync = _nfs4_call_sync,
e047a10c 5684 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5685 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5686 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5687 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5688};
5689
5690#if defined(CONFIG_NFS_V4_1)
5691static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5692 .minor_version = 1,
5693 .call_sync = _nfs4_call_sync_session,
e047a10c 5694 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5695 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5696 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5697 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5698};
5699#endif
5700
97dc1359
TM		 5701const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5702 [0] = &nfs_v4_0_minor_ops,
5703#if defined(CONFIG_NFS_V4_1)
5704 [1] = &nfs_v4_1_minor_ops,
5705#endif
5706};
5707
92e1d5be 5708static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5709 .permission = nfs_permission,
5710 .getattr = nfs_getattr,
5711 .setattr = nfs_setattr,
64c2ce8b
AK		 5712 .getxattr = generic_getxattr,
5713 .setxattr = generic_setxattr,
5714 .listxattr = generic_listxattr,
5715 .removexattr = generic_removexattr,
6b3b5496
BF		 5716};
5717
509de811 5718const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5719 .version = 4, /* protocol version */
5720 .dentry_ops = &nfs4_dentry_operations,
5721 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5722 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5723 .getroot = nfs4_proc_get_root,
5724 .getattr = nfs4_proc_getattr,
5725 .setattr = nfs4_proc_setattr,
2b3de441 5726 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5727 .lookup = nfs4_proc_lookup,
5728 .access = nfs4_proc_access,
5729 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5730 .create = nfs4_proc_create,
5731 .remove = nfs4_proc_remove,
5732 .unlink_setup = nfs4_proc_unlink_setup,
5733 .unlink_done = nfs4_proc_unlink_done,
5734 .rename = nfs4_proc_rename,
d3d4152a
JL		 5735 .rename_setup = nfs4_proc_rename_setup,
5736 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5737 .link = nfs4_proc_link,
5738 .symlink = nfs4_proc_symlink,
5739 .mkdir = nfs4_proc_mkdir,
5740 .rmdir = nfs4_proc_remove,
5741 .readdir = nfs4_proc_readdir,
5742 .mknod = nfs4_proc_mknod,
5743 .statfs = nfs4_proc_statfs,
5744 .fsinfo = nfs4_proc_fsinfo,
5745 .pathconf = nfs4_proc_pathconf,
e9326dca 5746 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5747 .decode_dirent = nfs4_decode_dirent,
5748 .read_setup = nfs4_proc_read_setup,
ec06c096 5749 .read_done = nfs4_read_done,
1da177e4 5750 .write_setup = nfs4_proc_write_setup,
788e7a89 5751 .write_done = nfs4_write_done,
1da177e4 5752 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5753 .commit_done = nfs4_commit_done,
1da177e4 5754 .lock = nfs4_proc_lock,
e50a1c2e 5755 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5756 .close_context = nfs4_close_context,
2b484297 5757 .open_context = nfs4_atomic_open,
45a52a02 5758 .init_client = nfs4_init_client,
1da177e4
LT		 5759};
5760
64c2ce8b
AK		 5761static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5762 .prefix = XATTR_NAME_NFSV4_ACL,
5763 .list = nfs4_xattr_list_nfs4_acl,
5764 .get = nfs4_xattr_get_nfs4_acl,
5765 .set = nfs4_xattr_set_nfs4_acl,
5766};
5767
5768const struct xattr_handler *nfs4_xattr_handlers[] = {
5769 &nfs4_xattr_nfs4_acl_handler,
5770 NULL
5771};
5772
1da177e4
LT		 5773/*
5774 * Local variables:
5775 * c-basic-offset: 8
5776 * End:
5777 */
Linux 6.x block layer and io_uring tree(s)