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pnfs-obj: define per-inode private structure
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
5a0e3ad6 42#include <linux/slab.h>
1da177e4 43#include <linux/sunrpc/clnt.h>
8f70e95f 44#include <linux/sunrpc/gss_api.h>
1da177e4
LT		 45#include <linux/nfs.h>
46#include <linux/nfs4.h>
47#include <linux/nfs_fs.h>
48#include <linux/nfs_page.h>
9b7160c5 49#include <linux/nfs_mount.h>
1da177e4 50#include <linux/namei.h>
02a913a7 51#include <linux/mount.h>
99fe60d0 52#include <linux/module.h>
5a0ffe54 53#include <linux/sunrpc/bc_xprt.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
1da177e4 56
4ce79717 57#include "nfs4_fs.h"
1da177e4 58#include "delegation.h"
101070ca 59#include "internal.h"
006ea73e 60#include "iostat.h"
fc931582 61#include "callback.h"
b1f69b75 62#include "pnfs.h"
1da177e4
LT		 63
64#define NFSDBG_FACILITY NFSDBG_PROC
65
2066fe89 66#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 67#define NFS4_POLL_RETRY_MAX (15*HZ)
68
a78cb57a
TM		 69#define NFS4_MAX_LOOP_ON_RECOVER (10)
70
cdd4e68b 71struct nfs4_opendata;
864472e9 72static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 73static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 74static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 75static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
7c513058
BS		 76static int _nfs4_proc_lookup(struct rpc_clnt *client, struct inode *dir,
77 const struct qstr *name, struct nfs_fh *fhandle,
78 struct nfs_fattr *fattr);
9936781d 79static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 80static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
1da177e4 83
1da177e4 84/* Prevent leaks of NFSv4 errors into userland */
46f72f57 85static int nfs4_map_errors(int err)
1da177e4 86{
52567b03
TM		 87 if (err >= -1000)
88 return err;
89 switch (err) {
90 case -NFS4ERR_RESOURCE:
91 return -EREMOTEIO;
7ebb9315
BS		 92 case -NFS4ERR_WRONGSEC:
93 return -EPERM;
3ddeb7c5
TM		 94 case -NFS4ERR_BADOWNER:
95 case -NFS4ERR_BADNAME:
96 return -EINVAL;
52567b03 97 default:
1da177e4 98 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 99 __func__, -err);
52567b03 100 break;
1da177e4 101 }
52567b03 102 return -EIO;
1da177e4
LT		 103}
104
105/*
106 * This is our standard bitmap for GETATTR requests.
107 */
108const u32 nfs4_fattr_bitmap[2] = {
109 FATTR4_WORD0_TYPE
110 | FATTR4_WORD0_CHANGE
111 | FATTR4_WORD0_SIZE
112 | FATTR4_WORD0_FSID
113 | FATTR4_WORD0_FILEID,
114 FATTR4_WORD1_MODE
115 | FATTR4_WORD1_NUMLINKS
116 | FATTR4_WORD1_OWNER
117 | FATTR4_WORD1_OWNER_GROUP
118 | FATTR4_WORD1_RAWDEV
119 | FATTR4_WORD1_SPACE_USED
120 | FATTR4_WORD1_TIME_ACCESS
121 | FATTR4_WORD1_TIME_METADATA
122 | FATTR4_WORD1_TIME_MODIFY
123};
124
125const u32 nfs4_statfs_bitmap[2] = {
126 FATTR4_WORD0_FILES_AVAIL
127 | FATTR4_WORD0_FILES_FREE
128 | FATTR4_WORD0_FILES_TOTAL,
129 FATTR4_WORD1_SPACE_AVAIL
130 | FATTR4_WORD1_SPACE_FREE
131 | FATTR4_WORD1_SPACE_TOTAL
132};
133
4ce79717 134const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 135 FATTR4_WORD0_MAXLINK
136 | FATTR4_WORD0_MAXNAME,
137 0
138};
139
140const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
141 | FATTR4_WORD0_MAXREAD
142 | FATTR4_WORD0_MAXWRITE
143 | FATTR4_WORD0_LEASE_TIME,
55b6e774 144 FATTR4_WORD1_TIME_DELTA
504913fb 145 | FATTR4_WORD1_FS_LAYOUT_TYPES
1da177e4
LT		 146};
147
830b8e33
MN		 148const u32 nfs4_fs_locations_bitmap[2] = {
149 FATTR4_WORD0_TYPE
150 | FATTR4_WORD0_CHANGE
151 | FATTR4_WORD0_SIZE
152 | FATTR4_WORD0_FSID
153 | FATTR4_WORD0_FILEID
154 | FATTR4_WORD0_FS_LOCATIONS,
155 FATTR4_WORD1_MODE
156 | FATTR4_WORD1_NUMLINKS
157 | FATTR4_WORD1_OWNER
158 | FATTR4_WORD1_OWNER_GROUP
159 | FATTR4_WORD1_RAWDEV
160 | FATTR4_WORD1_SPACE_USED
161 | FATTR4_WORD1_TIME_ACCESS
162 | FATTR4_WORD1_TIME_METADATA
163 | FATTR4_WORD1_TIME_MODIFY
164 | FATTR4_WORD1_MOUNTED_ON_FILEID
165};
166
bc4785cd 167static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 168 struct nfs4_readdir_arg *readdir)
169{
0dbb4c67 170 __be32 *start, *p;
1da177e4
LT		 171
172 BUG_ON(readdir->count < 80);
173 if (cookie > 2) {
b7ef1956 174 readdir->cookie = cookie;
1da177e4
LT		 175 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
176 return;
177 }
178
179 readdir->cookie = 0;
180 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
181 if (cookie == 2)
182 return;
183
184 /*
185 * NFSv4 servers do not return entries for '.' and '..'
186 * Therefore, we fake these entries here. We let '.'
187 * have cookie 0 and '..' have cookie 1. Note that
188 * when talking to the server, we always send cookie 0
189 * instead of 1 or 2.
190 */
0dbb4c67 191 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 192
193 if (cookie == 0) {
194 *p++ = xdr_one; /* next */
195 *p++ = xdr_zero; /* cookie, first word */
196 *p++ = xdr_one; /* cookie, second word */
197 *p++ = xdr_one; /* entry len */
198 memcpy(p, ".\0\0\0", 4); /* entry */
199 p++;
200 *p++ = xdr_one; /* bitmap length */
201 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
202 *p++ = htonl(8); /* attribute buffer length */
4e769b93 203 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 204 }
205
206 *p++ = xdr_one; /* next */
207 *p++ = xdr_zero; /* cookie, first word */
208 *p++ = xdr_two; /* cookie, second word */
209 *p++ = xdr_two; /* entry len */
210 memcpy(p, "..\0\0", 4); /* entry */
211 p++;
212 *p++ = xdr_one; /* bitmap length */
213 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
214 *p++ = htonl(8); /* attribute buffer length */
4e769b93 215 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 216
217 readdir->pgbase = (char *)p - (char *)start;
218 readdir->count -= readdir->pgbase;
219 kunmap_atomic(start, KM_USER0);
220}
221
65de872e
TM		 222static int nfs4_wait_clnt_recover(struct nfs_client *clp)
223{
224 int res;
225
226 might_sleep();
227
e005e804 228 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 229 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 230 return res;
231}
232
233static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
234{
235 int res = 0;
236
237 might_sleep();
238
239 if (*timeout <= 0)
240 *timeout = NFS4_POLL_RETRY_MIN;
241 if (*timeout > NFS4_POLL_RETRY_MAX)
242 *timeout = NFS4_POLL_RETRY_MAX;
243 schedule_timeout_killable(*timeout);
244 if (fatal_signal_pending(current))
245 res = -ERESTARTSYS;
246 *timeout <<= 1;
247 return res;
248}
249
250/* This is the error handling routine for processes that are allowed
251 * to sleep.
252 */
b064eca2 253static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 254{
255 struct nfs_client *clp = server->nfs_client;
9e33bed5 256 struct nfs4_state *state = exception->state;
65de872e
TM		 257 int ret = errorcode;
258
259 exception->retry = 0;
260 switch(errorcode) {
261 case 0:
262 return 0;
9e33bed5
TM		 263 case -NFS4ERR_ADMIN_REVOKED:
264 case -NFS4ERR_BAD_STATEID:
265 case -NFS4ERR_OPENMODE:
266 if (state == NULL)
267 break;
0400a6b0
TM		 268 nfs4_schedule_stateid_recovery(server, state);
269 goto wait_on_recovery;
65de872e 270 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 271 case -NFS4ERR_STALE_CLIENTID:
65de872e 272 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 273 nfs4_schedule_lease_recovery(clp);
274 goto wait_on_recovery;
03391693 275#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 276 case -NFS4ERR_BADSESSION:
277 case -NFS4ERR_BADSLOT:
278 case -NFS4ERR_BAD_HIGH_SLOT:
279 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
280 case -NFS4ERR_DEADSESSION:
281 case -NFS4ERR_SEQ_FALSE_RETRY:
282 case -NFS4ERR_SEQ_MISORDERED:
283 dprintk("%s ERROR: %d Reset session\n", __func__,
284 errorcode);
0400a6b0 285 nfs4_schedule_session_recovery(clp->cl_session);
4745e315 286 exception->retry = 1;
b9179237 287 break;
03391693 288#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 289 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 290 if (exception->timeout > HZ) {
291 /* We have retried a decent amount, time to
292 * fail
293 */
294 ret = -EBUSY;
295 break;
296 }
65de872e
TM		 297 case -NFS4ERR_GRACE:
298 case -NFS4ERR_DELAY:
2c643488 299 case -EKEYEXPIRED:
65de872e
TM		 300 ret = nfs4_delay(server->client, &exception->timeout);
301 if (ret != 0)
302 break;
a8a4ae3a 303 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 304 case -NFS4ERR_OLD_STATEID:
305 exception->retry = 1;
b064eca2
TM		 306 break;
307 case -NFS4ERR_BADOWNER:
308 /* The following works around a Linux server bug! */
309 case -NFS4ERR_BADNAME:
310 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
311 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
312 exception->retry = 1;
313 printk(KERN_WARNING "NFS: v4 server %s "
314 "does not accept raw "
315 "uid/gids. "
316 "Reenabling the idmapper.\n",
317 server->nfs_client->cl_hostname);
318 }
65de872e
TM		 319 }
320 /* We failed to handle the error */
321 return nfs4_map_errors(ret);
0400a6b0 322wait_on_recovery:
a2c0b9e2
TM		 323 ret = nfs4_wait_clnt_recover(clp);
324 if (ret == 0)
325 exception->retry = 1;
326 return ret;
65de872e
TM		 327}
328
329
452e9352 330static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 331{
1da177e4
LT		 332 spin_lock(&clp->cl_lock);
333 if (time_before(clp->cl_last_renewal,timestamp))
334 clp->cl_last_renewal = timestamp;
335 spin_unlock(&clp->cl_lock);
336}
337
452e9352
TM		 338static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
339{
340 do_renew_lease(server->nfs_client, timestamp);
341}
342
cccef3b9
AA		 343#if defined(CONFIG_NFS_V4_1)
344
e2c4ab3c
AA		 345/*
346 * nfs4_free_slot - free a slot and efficiently update slot table.
347 *
348 * freeing a slot is trivially done by clearing its respective bit
349 * in the bitmap.
350 * If the freed slotid equals highest_used_slotid we want to update it
351 * so that the server would be able to size down the slot table if needed,
352 * otherwise we know that the highest_used_slotid is still in use.
353 * When updating highest_used_slotid there may be "holes" in the bitmap
354 * so we need to scan down from highest_used_slotid to 0 looking for the now
355 * highest slotid in use.
356 * If none found, highest_used_slotid is set to -1.
35dc1d74
TM		 357 *
358 * Must be called while holding tbl->slot_tbl_lock
e2c4ab3c
AA		 359 */
360static void
dfb4f309 361nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
e2c4ab3c 362{
dfb4f309 363 int free_slotid = free_slot - tbl->slots;
e2c4ab3c
AA		 364 int slotid = free_slotid;
365
dfb4f309 366 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
e2c4ab3c
AA		 367 /* clear used bit in bitmap */
368 __clear_bit(slotid, tbl->used_slots);
369
370 /* update highest_used_slotid when it is freed */
371 if (slotid == tbl->highest_used_slotid) {
372 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
bcb56164 373 if (slotid < tbl->max_slots)
e2c4ab3c
AA		 374 tbl->highest_used_slotid = slotid;
375 else
376 tbl->highest_used_slotid = -1;
377 }
e2c4ab3c
AA		 378 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
379 free_slotid, tbl->highest_used_slotid);
380}
381
3bfb0fc5 382/*
42acd021 383 * Signal state manager thread if session fore channel is drained
3bfb0fc5 384 */
42acd021 385static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
3bfb0fc5 386{
689cf5c1
AB		 387 struct rpc_task *task;
388
a2118c33 389 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
689cf5c1
AB		 390 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
391 if (task)
392 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
3bfb0fc5
AB		 393 return;
394 }
395
396 if (ses->fc_slot_table.highest_used_slotid != -1)
397 return;
398
42acd021
AA		 399 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
400 complete(&ses->fc_slot_table.complete);
401}
402
403/*
404 * Signal state manager thread if session back channel is drained
405 */
406void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
407{
408 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
409 ses->bc_slot_table.highest_used_slotid != -1)
410 return;
411 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
412 complete(&ses->bc_slot_table.complete);
3bfb0fc5
AB		 413}
414
d185a334 415static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871
AA		 416{
417 struct nfs4_slot_table *tbl;
418
d185a334 419 tbl = &res->sr_session->fc_slot_table;
dfb4f309 420 if (!res->sr_slot) {
13615871
AA		 421 /* just wake up the next guy waiting since
422 * we may have not consumed a slot after all */
691daf3b 423 dprintk("%s: No slot\n", __func__);
35dc1d74 424 return;
13615871 425 }
ea028ac9 426
35dc1d74 427 spin_lock(&tbl->slot_tbl_lock);
dfb4f309 428 nfs4_free_slot(tbl, res->sr_slot);
42acd021 429 nfs4_check_drain_fc_complete(res->sr_session);
35dc1d74 430 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 431 res->sr_slot = NULL;
13615871
AA		 432}
433
14516c3a 434static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c
AA		 435{
436 unsigned long timestamp;
14516c3a 437 struct nfs_client *clp;
b0df806c
AA		 438
439 /*
440 * sr_status remains 1 if an RPC level error occurred. The server
441 * may or may not have processed the sequence operation..
442 * Proceed as if the server received and processed the sequence
443 * operation.
444 */
445 if (res->sr_status == 1)
446 res->sr_status = NFS_OK;
447
468f8613
BS		 448 /* don't increment the sequence number if the task wasn't sent */
449 if (!RPC_WAS_SENT(task))
b0df806c
AA		 450 goto out;
451
691daf3b 452 /* Check the SEQUENCE operation status */
14516c3a
TM		 453 switch (res->sr_status) {
454 case 0:
b0df806c 455 /* Update the slot's sequence and clientid lease timer */
dfb4f309 456 ++res->sr_slot->seq_nr;
b0df806c 457 timestamp = res->sr_renewal_time;
14516c3a 458 clp = res->sr_session->clp;
452e9352 459 do_renew_lease(clp, timestamp);
0629e370 460 /* Check sequence flags */
b4410c2f
TM		 461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
14516c3a
TM		 463 break;
464 case -NFS4ERR_DELAY:
465 /* The server detected a resend of the RPC call and
466 * returned NFS4ERR_DELAY as per Section 2.10.6.2
467 * of RFC5661.
468 */
12364a4f 469 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
dfb4f309
BH		 470 __func__,
471 res->sr_slot - res->sr_session->fc_slot_table.slots,
472 res->sr_slot->seq_nr);
14516c3a
TM		 473 goto out_retry;
474 default:
475 /* Just update the slot sequence no. */
dfb4f309 476 ++res->sr_slot->seq_nr;
b0df806c
AA		 477 }
478out:
479 /* The session may be reset by one of the error handlers. */
480 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 481 nfs41_sequence_free_slot(res);
14516c3a
TM		 482 return 1;
483out_retry:
d05dd4e9 484 if (!rpc_restart_call(task))
14516c3a
TM		 485 goto out;
486 rpc_delay(task, NFS4_POLL_RETRY_MAX);
487 return 0;
b0df806c
AA		 488}
489
14516c3a
TM		 490static int nfs4_sequence_done(struct rpc_task *task,
491 struct nfs4_sequence_res *res)
df896455 492{
14516c3a
TM		 493 if (res->sr_session == NULL)
494 return 1;
495 return nfs41_sequence_done(task, res);
df896455
TM		 496}
497
510b8175
BH		 498/*
499 * nfs4_find_slot - efficiently look for a free slot
500 *
501 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
502 * If found, we mark the slot as used, update the highest_used_slotid,
503 * and respectively set up the sequence operation args.
504 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 505 *
506 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 507 */
508static u8
40ead580 509nfs4_find_slot(struct nfs4_slot_table *tbl)
510b8175
BH		 510{
511 int slotid;
512 u8 ret_id = NFS4_MAX_SLOT_TABLE;
513 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
514
510b8175
BH		 515 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
516 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
517 tbl->max_slots);
518 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
519 if (slotid >= tbl->max_slots)
520 goto out;
521 __set_bit(slotid, tbl->used_slots);
522 if (slotid > tbl->highest_used_slotid)
523 tbl->highest_used_slotid = slotid;
524 ret_id = slotid;
525out:
526 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
527 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 528 return ret_id;
529}
530
dc70d7b3 531int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 532 struct nfs4_sequence_args *args,
533 struct nfs4_sequence_res *res,
534 int cache_reply,
535 struct rpc_task *task)
536{
fbcd4abc
AA		 537 struct nfs4_slot *slot;
538 struct nfs4_slot_table *tbl;
539 u8 slotid;
540
541 dprintk("--> %s\n", __func__);
ce5039c1 542 /* slot already allocated? */
dfb4f309 543 if (res->sr_slot != NULL)
ce5039c1
AA		 544 return 0;
545
fbcd4abc
AA		 546 tbl = &session->fc_slot_table;
547
548 spin_lock(&tbl->slot_tbl_lock);
a2118c33 549 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 550 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
ea028ac9
AA		 551 /*
552 * The state manager will wait until the slot table is empty.
553 * Schedule the reset thread
554 */
05f0d236 555 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 556 spin_unlock(&tbl->slot_tbl_lock);
bcb56164 557 dprintk("%s Schedule Session Reset\n", __func__);
05f0d236 558 return -EAGAIN;
b069d94a
AA		 559 }
560
689cf5c1
AB		 561 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
562 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
563 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
564 spin_unlock(&tbl->slot_tbl_lock);
565 dprintk("%s enforce FIFO order\n", __func__);
566 return -EAGAIN;
567 }
568
40ead580 569 slotid = nfs4_find_slot(tbl);
fbcd4abc
AA		 570 if (slotid == NFS4_MAX_SLOT_TABLE) {
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("<-- %s: no free slots\n", __func__);
574 return -EAGAIN;
575 }
576 spin_unlock(&tbl->slot_tbl_lock);
577
689cf5c1 578 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
fbcd4abc 579 slot = tbl->slots + slotid;
99fe60d0 580 args->sa_session = session;
fbcd4abc
AA		 581 args->sa_slotid = slotid;
582 args->sa_cache_this = cache_reply;
583
584 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
585
99fe60d0 586 res->sr_session = session;
dfb4f309 587 res->sr_slot = slot;
fbcd4abc 588 res->sr_renewal_time = jiffies;
2a6e26cd 589 res->sr_status_flags = 0;
fbcd4abc
AA		 590 /*
591 * sr_status is only set in decode_sequence, and so will remain
592 * set to 1 if an rpc level failure occurs.
593 */
594 res->sr_status = 1;
ce5039c1
AA		 595 return 0;
596}
dc70d7b3 597EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 598
035168ab 599int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 600 struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res,
602 int cache_reply,
603 struct rpc_task *task)
604{
035168ab 605 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 606 int ret = 0;
607
035168ab
TM		 608 if (session == NULL) {
609 args->sa_session = NULL;
610 res->sr_session = NULL;
611 goto out;
612 }
613
12364a4f 614 dprintk("--> %s clp %p session %p sr_slot %td\n",
dfb4f309
BH		 615 __func__, session->clp, session, res->sr_slot ?
616 res->sr_slot - session->fc_slot_table.slots : -1);
ce5039c1 617
035168ab 618 ret = nfs41_setup_sequence(session, args, res, cache_reply,
ce5039c1 619 task);
ce5039c1
AA		 620out:
621 dprintk("<-- %s status=%d\n", __func__, ret);
622 return ret;
623}
624
625struct nfs41_call_sync_data {
035168ab 626 const struct nfs_server *seq_server;
ce5039c1
AA		 627 struct nfs4_sequence_args *seq_args;
628 struct nfs4_sequence_res *seq_res;
629 int cache_reply;
630};
631
632static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
633{
634 struct nfs41_call_sync_data *data = calldata;
635
035168ab
TM		 636 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
637
638 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
ce5039c1
AA		 639 data->seq_res, data->cache_reply, task))
640 return;
641 rpc_call_start(task);
642}
643
b257957e
AB		 644static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
645{
646 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
647 nfs41_call_sync_prepare(task, calldata);
648}
649
69ab40c4
AA		 650static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
651{
652 struct nfs41_call_sync_data *data = calldata;
653
14516c3a 654 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 655}
656
ce5039c1
AA		 657struct rpc_call_ops nfs41_call_sync_ops = {
658 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 659 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 660};
661
b257957e
AB		 662struct rpc_call_ops nfs41_call_priv_sync_ops = {
663 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
664 .rpc_call_done = nfs41_call_sync_done,
665};
666
7c513058
BS		 667static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
ce5039c1
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res,
b257957e
AB		 672 int cache_reply,
673 int privileged)
ce5039c1
AA		 674{
675 int ret;
676 struct rpc_task *task;
677 struct nfs41_call_sync_data data = {
035168ab 678 .seq_server = server,
ce5039c1
AA		 679 .seq_args = args,
680 .seq_res = res,
681 .cache_reply = cache_reply,
682 };
683 struct rpc_task_setup task_setup = {
7c513058 684 .rpc_client = clnt,
ce5039c1
AA		 685 .rpc_message = msg,
686 .callback_ops = &nfs41_call_sync_ops,
687 .callback_data = &data
688 };
689
dfb4f309 690 res->sr_slot = NULL;
b257957e
AB		 691 if (privileged)
692 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 693 task = rpc_run_task(&task_setup);
694 if (IS_ERR(task))
695 ret = PTR_ERR(task);
696 else {
697 ret = task->tk_status;
698 rpc_put_task(task);
699 }
700 return ret;
701}
702
7c513058
BS		 703int _nfs4_call_sync_session(struct rpc_clnt *clnt,
704 struct nfs_server *server,
cccef3b9
AA		 705 struct rpc_message *msg,
706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
708 int cache_reply)
709{
7c513058 710 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
cccef3b9
AA		 711}
712
df896455 713#else
14516c3a
TM		 714static int nfs4_sequence_done(struct rpc_task *task,
715 struct nfs4_sequence_res *res)
df896455 716{
14516c3a 717 return 1;
df896455 718}
cccef3b9
AA		 719#endif /* CONFIG_NFS_V4_1 */
720
7c513058
BS		 721int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
cccef3b9
AA		 723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
725 struct nfs4_sequence_res *res,
726 int cache_reply)
727{
f3752975 728 args->sa_session = res->sr_session = NULL;
7c513058 729 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 730}
731
e73b83f2 732static inline
7c513058
BS		 733int nfs4_call_sync(struct rpc_clnt *clnt,
734 struct nfs_server *server,
e73b83f2
BS		 735 struct rpc_message *msg,
736 struct nfs4_sequence_args *args,
737 struct nfs4_sequence_res *res,
738 int cache_reply)
739{
7c513058
BS		 740 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
741 args, res, cache_reply);
e73b83f2 742}
cccef3b9 743
38478b24 744static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 745{
38478b24 746 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 747
38478b24 748 spin_lock(&dir->i_lock);
40d24704
TM		 749 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
750 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 751 nfs_force_lookup_revalidate(dir);
40d24704 752 nfsi->change_attr = cinfo->after;
38478b24 753 spin_unlock(&dir->i_lock);
1da177e4
LT		 754}
755
e56e0b78 756struct nfs4_opendata {
c6d00e63 757 struct kref kref;
e56e0b78
TM		 758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
cdd4e68b
TM		 760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
e56e0b78
TM		 762 struct nfs_fattr f_attr;
763 struct nfs_fattr dir_attr;
ad389da7 764 struct path path;
e56e0b78
TM		 765 struct dentry *dir;
766 struct nfs4_state_owner *owner;
aac00a8d 767 struct nfs4_state *state;
e56e0b78 768 struct iattr attrs;
26e976a8 769 unsigned long timestamp;
3e309914 770 unsigned int rpc_done : 1;
24ac23ab
TM		 771 int rpc_status;
772 int cancelled;
e56e0b78
TM		 773};
774
2ced46c2
TM		 775
776static void nfs4_init_opendata_res(struct nfs4_opendata *p)
777{
778 p->o_res.f_attr = &p->f_attr;
779 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 780 p->o_res.seqid = p->o_arg.seqid;
781 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 782 p->o_res.server = p->o_arg.server;
783 nfs_fattr_init(&p->f_attr);
784 nfs_fattr_init(&p->dir_attr);
785}
786
ad389da7 787static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 788 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 789 const struct iattr *attrs,
790 gfp_t gfp_mask)
e56e0b78 791{
ad389da7 792 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 793 struct inode *dir = parent->d_inode;
794 struct nfs_server *server = NFS_SERVER(dir);
795 struct nfs4_opendata *p;
796
8535b2be 797 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 798 if (p == NULL)
799 goto err;
8535b2be 800 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 801 if (p->o_arg.seqid == NULL)
802 goto err_free;
f6948697
AV		 803 path_get(path);
804 p->path = *path;
e56e0b78
TM		 805 p->dir = parent;
806 p->owner = sp;
807 atomic_inc(&sp->so_count);
808 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 809 p->o_arg.open_flags = flags;
810 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 811 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 812 p->o_arg.id = sp->so_owner_id.id;
ad389da7 813 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 814 p->o_arg.server = server;
815 p->o_arg.bitmask = server->attr_bitmask;
816 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
d77d76ff
TM		 817 if (flags & O_CREAT) {
818 u32 *s;
819
e56e0b78
TM		 820 p->o_arg.u.attrs = &p->attrs;
821 memcpy(&p->attrs, attrs, sizeof(p->attrs));
d77d76ff
TM		 822 s = (u32 *) p->o_arg.u.verifier.data;
823 s[0] = jiffies;
824 s[1] = current->pid;
e56e0b78 825 }
cdd4e68b
TM		 826 p->c_arg.fh = &p->o_res.fh;
827 p->c_arg.stateid = &p->o_res.stateid;
828 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 829 nfs4_init_opendata_res(p);
c6d00e63 830 kref_init(&p->kref);
e56e0b78
TM		 831 return p;
832err_free:
833 kfree(p);
834err:
835 dput(parent);
836 return NULL;
837}
838
c6d00e63 839static void nfs4_opendata_free(struct kref *kref)
e56e0b78 840{
c6d00e63
TM		 841 struct nfs4_opendata *p = container_of(kref,
842 struct nfs4_opendata, kref);
843
844 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 845 if (p->state != NULL)
846 nfs4_put_open_state(p->state);
c6d00e63
TM		 847 nfs4_put_state_owner(p->owner);
848 dput(p->dir);
31f31db1 849 path_put(&p->path);
c6d00e63
TM		 850 kfree(p);
851}
852
853static void nfs4_opendata_put(struct nfs4_opendata *p)
854{
855 if (p != NULL)
856 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 857}
858
06f814a3
TM		 859static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
860{
06f814a3
TM		 861 int ret;
862
06f814a3 863 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 864 return ret;
865}
866
dc0b027d 867static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 868{
869 int ret = 0;
dc0b027d
TM		 870
871 if (open_mode & O_EXCL)
872 goto out;
873 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 874 case FMODE_READ:
88069f77
TM		 875 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
876 && state->n_rdonly != 0;
6ee41268
TM		 877 break;
878 case FMODE_WRITE:
88069f77
TM		 879 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
880 && state->n_wronly != 0;
6ee41268
TM		 881 break;
882 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 883 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
884 && state->n_rdwr != 0;
6ee41268 885 }
dc0b027d 886out:
6ee41268
TM		 887 return ret;
888}
889
dc0b027d 890static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 891{
dc0b027d 892 if ((delegation->type & fmode) != fmode)
aac00a8d 893 return 0;
15c831bf 894 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 895 return 0;
b7391f44 896 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 897 return 1;
898}
899
dc0b027d 900static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 901{
dc0b027d 902 switch (fmode) {
e7616923
TM		 903 case FMODE_WRITE:
904 state->n_wronly++;
905 break;
906 case FMODE_READ:
907 state->n_rdonly++;
908 break;
909 case FMODE_READ|FMODE_WRITE:
910 state->n_rdwr++;
911 }
dc0b027d 912 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 913}
914
dc0b027d 915static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 916{
917 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
918 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
919 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 920 switch (fmode) {
003707c7
TM		 921 case FMODE_READ:
922 set_bit(NFS_O_RDONLY_STATE, &state->flags);
923 break;
924 case FMODE_WRITE:
925 set_bit(NFS_O_WRONLY_STATE, &state->flags);
926 break;
927 case FMODE_READ|FMODE_WRITE:
928 set_bit(NFS_O_RDWR_STATE, &state->flags);
929 }
e7616923
TM		 930}
931
dc0b027d 932static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 933{
8bda4e4c 934 write_seqlock(&state->seqlock);
dc0b027d 935 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 936 write_sequnlock(&state->seqlock);
003707c7
TM		 937}
938
dc0b027d 939static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 940{
8bda4e4c
TM		 941 /*
942 * Protect the call to nfs4_state_set_mode_locked and
943 * serialise the stateid update
944 */
945 write_seqlock(&state->seqlock);
003707c7
TM		 946 if (deleg_stateid != NULL) {
947 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
948 set_bit(NFS_DELEGATED_STATE, &state->flags);
949 }
950 if (open_stateid != NULL)
dc0b027d 951 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 952 write_sequnlock(&state->seqlock);
953 spin_lock(&state->owner->so_lock);
dc0b027d 954 update_open_stateflags(state, fmode);
ec073428 955 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 956}
957
dc0b027d 958static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 959{
960 struct nfs_inode *nfsi = NFS_I(state->inode);
961 struct nfs_delegation *deleg_cur;
962 int ret = 0;
963
dc0b027d 964 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 965
966 rcu_read_lock();
967 deleg_cur = rcu_dereference(nfsi->delegation);
968 if (deleg_cur == NULL)
969 goto no_delegation;
970
971 spin_lock(&deleg_cur->lock);
972 if (nfsi->delegation != deleg_cur ||
dc0b027d 973 (deleg_cur->type & fmode) != fmode)
34310430
TM		 974 goto no_delegation_unlock;
975
976 if (delegation == NULL)
977 delegation = &deleg_cur->stateid;
978 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
979 goto no_delegation_unlock;
980
b7391f44 981 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 982 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 983 ret = 1;
984no_delegation_unlock:
985 spin_unlock(&deleg_cur->lock);
986no_delegation:
987 rcu_read_unlock();
988
989 if (!ret && open_stateid != NULL) {
dc0b027d 990 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 991 ret = 1;
992 }
993
994 return ret;
995}
996
997
dc0b027d 998static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 999{
1000 struct nfs_delegation *delegation;
1001
1002 rcu_read_lock();
1003 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1004 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1005 rcu_read_unlock();
1006 return;
1007 }
1008 rcu_read_unlock();
1009 nfs_inode_return_delegation(inode);
1010}
1011
6ee41268 1012static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1013{
1014 struct nfs4_state *state = opendata->state;
1015 struct nfs_inode *nfsi = NFS_I(state->inode);
1016 struct nfs_delegation *delegation;
dc0b027d
TM		 1017 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1018 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1019 nfs4_stateid stateid;
1020 int ret = -EAGAIN;
1021
aac00a8d 1022 for (;;) {
dc0b027d 1023 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1024 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1025 if (can_open_cached(state, fmode, open_mode)) {
1026 update_open_stateflags(state, fmode);
6ee41268 1027 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1028 goto out_return_state;
1029 }
1030 spin_unlock(&state->owner->so_lock);
1031 }
34310430
TM		 1032 rcu_read_lock();
1033 delegation = rcu_dereference(nfsi->delegation);
1034 if (delegation == NULL ||
dc0b027d 1035 !can_open_delegated(delegation, fmode)) {
34310430 1036 rcu_read_unlock();
aac00a8d 1037 break;
34310430 1038 }
aac00a8d
TM		 1039 /* Save the delegation */
1040 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1041 rcu_read_unlock();
af22f94a 1042 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1043 if (ret != 0)
1044 goto out;
1045 ret = -EAGAIN;
34310430
TM		 1046
1047 /* Try to update the stateid using the delegation */
dc0b027d 1048 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1049 goto out_return_state;
aac00a8d 1050 }
aac00a8d
TM		 1051out:
1052 return ERR_PTR(ret);
1053out_return_state:
1054 atomic_inc(&state->count);
1055 return state;
1056}
1057
24ac23ab
TM		 1058static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1059{
1060 struct inode *inode;
1061 struct nfs4_state *state = NULL;
003707c7 1062 struct nfs_delegation *delegation;
1b370bc2 1063 int ret;
24ac23ab 1064
aac00a8d 1065 if (!data->rpc_done) {
6ee41268 1066 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1067 goto out;
1068 }
1069
1b370bc2 1070 ret = -EAGAIN;
24ac23ab 1071 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1072 goto err;
24ac23ab 1073 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1074 ret = PTR_ERR(inode);
03f28e3a 1075 if (IS_ERR(inode))
1b370bc2
TM		 1076 goto err;
1077 ret = -ENOMEM;
24ac23ab
TM		 1078 state = nfs4_get_open_state(inode, data->owner);
1079 if (state == NULL)
1b370bc2 1080 goto err_put_inode;
549d6ed5 1081 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 1082 int delegation_flags = 0;
1083
003707c7
TM		 1084 rcu_read_lock();
1085 delegation = rcu_dereference(NFS_I(inode)->delegation);
1086 if (delegation)
1087 delegation_flags = delegation->flags;
1088 rcu_read_unlock();
15c831bf 1089 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 1090 nfs_inode_set_delegation(state->inode,
1091 data->owner->so_cred,
1092 &data->o_res);
1093 else
1094 nfs_inode_reclaim_delegation(state->inode,
1095 data->owner->so_cred,
1096 &data->o_res);
1097 }
34310430
TM		 1098
1099 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1100 data->o_arg.fmode);
24ac23ab 1101 iput(inode);
aac00a8d 1102out:
24ac23ab 1103 return state;
1b370bc2
TM		 1104err_put_inode:
1105 iput(inode);
1106err:
1107 return ERR_PTR(ret);
24ac23ab
TM		 1108}
1109
864472e9
TM		 1110static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1111{
1112 struct nfs_inode *nfsi = NFS_I(state->inode);
1113 struct nfs_open_context *ctx;
1114
1115 spin_lock(&state->inode->i_lock);
1116 list_for_each_entry(ctx, &nfsi->open_files, list) {
1117 if (ctx->state != state)
1118 continue;
1119 get_nfs_open_context(ctx);
1120 spin_unlock(&state->inode->i_lock);
1121 return ctx;
1122 }
1123 spin_unlock(&state->inode->i_lock);
1124 return ERR_PTR(-ENOENT);
1125}
1126
6f220ed5
TM		 1127static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1128{
1129 struct nfs4_opendata *opendata;
1130
8535b2be 1131 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1132 if (opendata == NULL)
1133 return ERR_PTR(-ENOMEM);
1134 opendata->state = state;
1135 atomic_inc(&state->count);
1136 return opendata;
1137}
1138
dc0b027d 1139static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1140{
2ced46c2 1141 struct nfs4_state *newstate;
864472e9
TM		 1142 int ret;
1143
dc0b027d
TM		 1144 opendata->o_arg.open_flags = 0;
1145 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1146 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1147 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1148 nfs4_init_opendata_res(opendata);
b257957e 1149 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1150 if (ret != 0)
1151 return ret;
2ced46c2 1152 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1153 if (IS_ERR(newstate))
1154 return PTR_ERR(newstate);
dc0b027d 1155 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1156 *res = newstate;
864472e9
TM		 1157 return 0;
1158}
1159
1160static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1161{
864472e9 1162 struct nfs4_state *newstate;
864472e9
TM		 1163 int ret;
1164
1165 /* memory barrier prior to reading state->n_* */
2ced46c2 1166 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1167 smp_rmb();
1168 if (state->n_rdwr != 0) {
b0ed9dbc 1169 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1170 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1171 if (ret != 0)
1172 return ret;
2ced46c2
TM		 1173 if (newstate != state)
1174 return -ESTALE;
864472e9
TM		 1175 }
1176 if (state->n_wronly != 0) {
b0ed9dbc 1177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1178 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1179 if (ret != 0)
1180 return ret;
2ced46c2
TM		 1181 if (newstate != state)
1182 return -ESTALE;
864472e9
TM		 1183 }
1184 if (state->n_rdonly != 0) {
b0ed9dbc 1185 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1186 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1187 if (ret != 0)
1188 return ret;
2ced46c2
TM		 1189 if (newstate != state)
1190 return -ESTALE;
864472e9 1191 }
1ac7e2fd
TM		 1192 /*
1193 * We may have performed cached opens for all three recoveries.
1194 * Check if we need to update the current stateid.
1195 */
1196 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1197 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1198 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1199 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1200 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1201 write_sequnlock(&state->seqlock);
1ac7e2fd 1202 }
864472e9
TM		 1203 return 0;
1204}
1205
1da177e4
LT		 1206/*
1207 * OPEN_RECLAIM:
1208 * reclaim state on the server after a reboot.
1da177e4 1209 */
539cd03a 1210static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1211{
1ac7e2fd 1212 struct nfs_delegation *delegation;
864472e9 1213 struct nfs4_opendata *opendata;
dc0b027d 1214 fmode_t delegation_type = 0;
1da177e4
LT		 1215 int status;
1216
6f220ed5
TM		 1217 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1218 if (IS_ERR(opendata))
1219 return PTR_ERR(opendata);
864472e9
TM		 1220 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1221 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1222 rcu_read_lock();
1223 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1224 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1225 delegation_type = delegation->type;
1ac7e2fd 1226 rcu_read_unlock();
864472e9
TM		 1227 opendata->o_arg.u.delegation_type = delegation_type;
1228 status = nfs4_open_recover(opendata, state);
c6d00e63 1229 nfs4_opendata_put(opendata);
1da177e4
LT		 1230 return status;
1231}
1232
539cd03a 1233static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1234{
1235 struct nfs_server *server = NFS_SERVER(state->inode);
1236 struct nfs4_exception exception = { };
1237 int err;
1238 do {
539cd03a 1239 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1240 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1241 break;
1242 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1243 } while (exception.retry);
1244 return err;
1245}
1246
864472e9
TM		 1247static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1248{
1249 struct nfs_open_context *ctx;
1250 int ret;
1251
1252 ctx = nfs4_state_find_open_context(state);
1253 if (IS_ERR(ctx))
1254 return PTR_ERR(ctx);
539cd03a 1255 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1256 put_nfs_open_context(ctx);
1257 return ret;
1258}
1259
13437e12 1260static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1261{
e56e0b78 1262 struct nfs4_opendata *opendata;
864472e9 1263 int ret;
1da177e4 1264
6f220ed5
TM		 1265 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1266 if (IS_ERR(opendata))
1267 return PTR_ERR(opendata);
e56e0b78 1268 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1269 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1270 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1271 ret = nfs4_open_recover(opendata, state);
c6d00e63 1272 nfs4_opendata_put(opendata);
864472e9 1273 return ret;
1da177e4
LT		 1274}
1275
13437e12 1276int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1277{
1278 struct nfs4_exception exception = { };
539cd03a 1279 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1280 int err;
1281 do {
13437e12 1282 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1283 switch (err) {
1284 case 0:
965b5d67
TM		 1285 case -ENOENT:
1286 case -ESTALE:
1287 goto out;
bcfa49f6
RL		 1288 case -NFS4ERR_BADSESSION:
1289 case -NFS4ERR_BADSLOT:
1290 case -NFS4ERR_BAD_HIGH_SLOT:
1291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1292 case -NFS4ERR_DEADSESSION:
0400a6b0 1293 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
bcfa49f6 1294 goto out;
1da177e4
LT		 1295 case -NFS4ERR_STALE_CLIENTID:
1296 case -NFS4ERR_STALE_STATEID:
1297 case -NFS4ERR_EXPIRED:
1298 /* Don't recall a delegation if it was lost */
0400a6b0 1299 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1300 goto out;
1301 case -ERESTARTSYS:
1302 /*
1303 * The show must go on: exit, but mark the
1304 * stateid as needing recovery.
1305 */
1306 case -NFS4ERR_ADMIN_REVOKED:
1307 case -NFS4ERR_BAD_STATEID:
0400a6b0 1308 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1309 case -EKEYEXPIRED:
1310 /*
1311 * User RPCSEC_GSS context has expired.
1312 * We cannot recover this stateid now, so
1313 * skip it and allow recovery thread to
1314 * proceed.
1315 */
965b5d67
TM		 1316 case -ENOMEM:
1317 err = 0;
1318 goto out;
1da177e4
LT		 1319 }
1320 err = nfs4_handle_exception(server, err, &exception);
1321 } while (exception.retry);
965b5d67 1322out:
1da177e4
LT		 1323 return err;
1324}
1325
cdd4e68b
TM		 1326static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1327{
1328 struct nfs4_opendata *data = calldata;
1329
1330 data->rpc_status = task->tk_status;
26e976a8 1331 if (data->rpc_status == 0) {
cdd4e68b
TM		 1332 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1333 sizeof(data->o_res.stateid.data));
bb22629e 1334 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1335 renew_lease(data->o_res.server, data->timestamp);
3e309914 1336 data->rpc_done = 1;
26e976a8 1337 }
cdd4e68b
TM		 1338}
1339
1340static void nfs4_open_confirm_release(void *calldata)
1341{
1342 struct nfs4_opendata *data = calldata;
1343 struct nfs4_state *state = NULL;
1344
1345 /* If this request hasn't been cancelled, do nothing */
1346 if (data->cancelled == 0)
1347 goto out_free;
1348 /* In case of error, no cleanup! */
3e309914 1349 if (!data->rpc_done)
cdd4e68b 1350 goto out_free;
cdd4e68b 1351 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1352 if (!IS_ERR(state))
dc0b027d 1353 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1354out_free:
c6d00e63 1355 nfs4_opendata_put(data);
cdd4e68b
TM		 1356}
1357
1358static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1359 .rpc_call_done = nfs4_open_confirm_done,
1360 .rpc_release = nfs4_open_confirm_release,
1361};
1362
1363/*
1364 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1365 */
1366static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1367{
1368 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1369 struct rpc_task *task;
5138fde0
TM		 1370 struct rpc_message msg = {
1371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1372 .rpc_argp = &data->c_arg,
1373 .rpc_resp = &data->c_res,
1374 .rpc_cred = data->owner->so_cred,
1375 };
c970aa85
TM		 1376 struct rpc_task_setup task_setup_data = {
1377 .rpc_client = server->client,
5138fde0 1378 .rpc_message = &msg,
c970aa85
TM		 1379 .callback_ops = &nfs4_open_confirm_ops,
1380 .callback_data = data,
101070ca 1381 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1382 .flags = RPC_TASK_ASYNC,
1383 };
1da177e4
LT		 1384 int status;
1385
c6d00e63 1386 kref_get(&data->kref);
3e309914
TM		 1387 data->rpc_done = 0;
1388 data->rpc_status = 0;
5138fde0 1389 data->timestamp = jiffies;
c970aa85 1390 task = rpc_run_task(&task_setup_data);
7a1218a2 1391 if (IS_ERR(task))
cdd4e68b 1392 return PTR_ERR(task);
cdd4e68b
TM		 1393 status = nfs4_wait_for_completion_rpc_task(task);
1394 if (status != 0) {
1395 data->cancelled = 1;
1396 smp_wmb();
1397 } else
1398 status = data->rpc_status;
e6b3c4db 1399 rpc_put_task(task);
1da177e4
LT		 1400 return status;
1401}
1402
24ac23ab 1403static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1404{
24ac23ab
TM		 1405 struct nfs4_opendata *data = calldata;
1406 struct nfs4_state_owner *sp = data->owner;
5138fde0 1407
24ac23ab
TM		 1408 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1409 return;
aac00a8d
TM		 1410 /*
1411 * Check if we still need to send an OPEN call, or if we can use
1412 * a delegation instead.
1413 */
1414 if (data->state != NULL) {
1415 struct nfs_delegation *delegation;
1416
dc0b027d 1417 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1418 goto out_no_action;
aac00a8d
TM		 1419 rcu_read_lock();
1420 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1421 if (delegation != NULL &&
15c831bf 1422 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1423 rcu_read_unlock();
6ee41268 1424 goto out_no_action;
aac00a8d
TM		 1425 }
1426 rcu_read_unlock();
1427 }
24ac23ab 1428 /* Update sequence id. */
9f958ab8 1429 data->o_arg.id = sp->so_owner_id.id;
1f0e890d 1430 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1431 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1432 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1433 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1434 }
26e976a8 1435 data->timestamp = jiffies;
035168ab 1436 if (nfs4_setup_sequence(data->o_arg.server,
d898528c
AA		 1437 &data->o_arg.seq_args,
1438 &data->o_res.seq_res, 1, task))
1439 return;
5138fde0 1440 rpc_call_start(task);
6ee41268
TM		 1441 return;
1442out_no_action:
1443 task->tk_action = NULL;
1444
24ac23ab 1445}
1da177e4 1446
b257957e
AB		 1447static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1448{
1449 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1450 nfs4_open_prepare(task, calldata);
1451}
1452
24ac23ab
TM		 1453static void nfs4_open_done(struct rpc_task *task, void *calldata)
1454{
1455 struct nfs4_opendata *data = calldata;
1da177e4 1456
24ac23ab 1457 data->rpc_status = task->tk_status;
d898528c 1458
14516c3a
TM		 1459 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1460 return;
d898528c 1461
24ac23ab
TM		 1462 if (task->tk_status == 0) {
1463 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1464 case S_IFREG:
1465 break;
1466 case S_IFLNK:
24ac23ab 1467 data->rpc_status = -ELOOP;
6f926b5b
TM		 1468 break;
1469 case S_IFDIR:
24ac23ab 1470 data->rpc_status = -EISDIR;
6f926b5b
TM		 1471 break;
1472 default:
24ac23ab 1473 data->rpc_status = -ENOTDIR;
6f926b5b 1474 }
26e976a8 1475 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1476 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1477 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1478 }
3e309914 1479 data->rpc_done = 1;
24ac23ab 1480}
6f926b5b 1481
24ac23ab
TM		 1482static void nfs4_open_release(void *calldata)
1483{
1484 struct nfs4_opendata *data = calldata;
1485 struct nfs4_state *state = NULL;
1486
1487 /* If this request hasn't been cancelled, do nothing */
1488 if (data->cancelled == 0)
1489 goto out_free;
1490 /* In case of error, no cleanup! */
3e309914 1491 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1492 goto out_free;
1493 /* In case we need an open_confirm, no cleanup! */
1494 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1495 goto out_free;
24ac23ab 1496 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1497 if (!IS_ERR(state))
dc0b027d 1498 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1499out_free:
c6d00e63 1500 nfs4_opendata_put(data);
24ac23ab
TM		 1501}
1502
1503static const struct rpc_call_ops nfs4_open_ops = {
1504 .rpc_call_prepare = nfs4_open_prepare,
1505 .rpc_call_done = nfs4_open_done,
1506 .rpc_release = nfs4_open_release,
1507};
1508
b257957e
AB		 1509static const struct rpc_call_ops nfs4_recover_open_ops = {
1510 .rpc_call_prepare = nfs4_recover_open_prepare,
1511 .rpc_call_done = nfs4_open_done,
1512 .rpc_release = nfs4_open_release,
1513};
1514
1515static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1516{
1517 struct inode *dir = data->dir->d_inode;
1518 struct nfs_server *server = NFS_SERVER(dir);
1519 struct nfs_openargs *o_arg = &data->o_arg;
1520 struct nfs_openres *o_res = &data->o_res;
1521 struct rpc_task *task;
5138fde0
TM		 1522 struct rpc_message msg = {
1523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1524 .rpc_argp = o_arg,
1525 .rpc_resp = o_res,
1526 .rpc_cred = data->owner->so_cred,
1527 };
c970aa85
TM		 1528 struct rpc_task_setup task_setup_data = {
1529 .rpc_client = server->client,
5138fde0 1530 .rpc_message = &msg,
c970aa85
TM		 1531 .callback_ops = &nfs4_open_ops,
1532 .callback_data = data,
101070ca 1533 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1534 .flags = RPC_TASK_ASYNC,
1535 };
24ac23ab
TM		 1536 int status;
1537
c6d00e63 1538 kref_get(&data->kref);
3e309914
TM		 1539 data->rpc_done = 0;
1540 data->rpc_status = 0;
2ced46c2 1541 data->cancelled = 0;
b257957e
AB		 1542 if (isrecover)
1543 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1544 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1545 if (IS_ERR(task))
1546 return PTR_ERR(task);
1547 status = nfs4_wait_for_completion_rpc_task(task);
1548 if (status != 0) {
1549 data->cancelled = 1;
1550 smp_wmb();
1551 } else
1552 status = data->rpc_status;
1553 rpc_put_task(task);
1554
1555 return status;
1556}
1557
1558static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1559{
1560 struct inode *dir = data->dir->d_inode;
1561 struct nfs_openres *o_res = &data->o_res;
1562 int status;
1563
1564 status = nfs4_run_open_task(data, 1);
1565 if (status != 0 || !data->rpc_done)
1566 return status;
1567
1568 nfs_refresh_inode(dir, o_res->dir_attr);
1569
1570 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1571 status = _nfs4_proc_open_confirm(data);
1572 if (status != 0)
1573 return status;
1574 }
1575
1576 return status;
1577}
1578
1579/*
1580 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1581 */
1582static int _nfs4_proc_open(struct nfs4_opendata *data)
1583{
1584 struct inode *dir = data->dir->d_inode;
1585 struct nfs_server *server = NFS_SERVER(dir);
1586 struct nfs_openargs *o_arg = &data->o_arg;
1587 struct nfs_openres *o_res = &data->o_res;
1588 int status;
1589
1590 status = nfs4_run_open_task(data, 0);
3e309914 1591 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1592 return status;
1593
56ae19f3
TM		 1594 if (o_arg->open_flags & O_CREAT) {
1595 update_changeattr(dir, &o_res->cinfo);
1596 nfs_post_op_update_inode(dir, o_res->dir_attr);
1597 } else
1598 nfs_refresh_inode(dir, o_res->dir_attr);
0df5dd4a
TM		 1599 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1600 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1601 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1602 status = _nfs4_proc_open_confirm(data);
1da177e4 1603 if (status != 0)
24ac23ab 1604 return status;
1da177e4
LT		 1605 }
1606 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1607 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1608 return 0;
1da177e4
LT		 1609}
1610
d83217c1 1611static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
58d9714a 1612{
a78cb57a 1613 unsigned int loop;
6b30954e 1614 int ret;
58d9714a 1615
a78cb57a 1616 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1617 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1618 if (ret != 0)
a78cb57a 1619 break;
e598d843
TM		 1620 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1621 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1622 break;
0400a6b0 1623 nfs4_schedule_state_manager(clp);
a78cb57a 1624 ret = -EIO;
6b30954e 1625 }
a78cb57a 1626 return ret;
58d9714a
TM		 1627}
1628
d83217c1
AA		 1629static int nfs4_recover_expired_lease(struct nfs_server *server)
1630{
1631 return nfs4_client_recover_expired_lease(server->nfs_client);
1632}
1633
1da177e4
LT		 1634/*
1635 * OPEN_EXPIRED:
1636 * reclaim state on the server after a network partition.
1637 * Assumes caller holds the appropriate lock
1638 */
539cd03a 1639static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1640{
e56e0b78 1641 struct nfs4_opendata *opendata;
864472e9 1642 int ret;
1da177e4 1643
6f220ed5
TM		 1644 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1645 if (IS_ERR(opendata))
1646 return PTR_ERR(opendata);
864472e9 1647 ret = nfs4_open_recover(opendata, state);
35d05778 1648 if (ret == -ESTALE)
539cd03a 1649 d_drop(ctx->path.dentry);
c6d00e63 1650 nfs4_opendata_put(opendata);
864472e9 1651 return ret;
1da177e4
LT		 1652}
1653
a9ed2e25 1654static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1655{
539cd03a 1656 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1657 struct nfs4_exception exception = { };
1658 int err;
1659
1660 do {
539cd03a 1661 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1662 switch (err) {
1663 default:
1664 goto out;
1665 case -NFS4ERR_GRACE:
1666 case -NFS4ERR_DELAY:
1667 nfs4_handle_exception(server, err, &exception);
1668 err = 0;
1669 }
202b50dc 1670 } while (exception.retry);
a9ed2e25 1671out:
202b50dc
TM		 1672 return err;
1673}
1674
1da177e4
LT		 1675static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1676{
1da177e4 1677 struct nfs_open_context *ctx;
864472e9 1678 int ret;
1da177e4 1679
864472e9
TM		 1680 ctx = nfs4_state_find_open_context(state);
1681 if (IS_ERR(ctx))
1682 return PTR_ERR(ctx);
539cd03a 1683 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1684 put_nfs_open_context(ctx);
1685 return ret;
1da177e4
LT		 1686}
1687
aa53ed54
JL		 1688/*
1689 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1690 * fields corresponding to attributes that were used to store the verifier.
1691 * Make sure we clobber those fields in the later setattr call
1692 */
1693static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1694{
1695 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1696 !(sattr->ia_valid & ATTR_ATIME_SET))
1697 sattr->ia_valid |= ATTR_ATIME;
1698
1699 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1700 !(sattr->ia_valid & ATTR_MTIME_SET))
1701 sattr->ia_valid |= ATTR_MTIME;
1702}
1703
1da177e4 1704/*
24ac23ab 1705 * Returns a referenced nfs4_state
1da177e4 1706 */
dc0b027d 1707static 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		 1708{
1709 struct nfs4_state_owner *sp;
1710 struct nfs4_state *state = NULL;
1711 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1712 struct nfs4_opendata *opendata;
aac00a8d 1713 int status;
1da177e4
LT		 1714
1715 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1716 status = -ENOMEM;
1717 if (!(sp = nfs4_get_state_owner(server, cred))) {
1718 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1719 goto out_err;
1720 }
58d9714a
TM		 1721 status = nfs4_recover_expired_lease(server);
1722 if (status != 0)
b4454fe1 1723 goto err_put_state_owner;
aac00a8d 1724 if (path->dentry->d_inode != NULL)
dc0b027d 1725 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1726 status = -ENOMEM;
8535b2be 1727 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1728 if (opendata == NULL)
95d35cb4 1729 goto err_put_state_owner;
1da177e4 1730
aac00a8d
TM		 1731 if (path->dentry->d_inode != NULL)
1732 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1733
24ac23ab 1734 status = _nfs4_proc_open(opendata);
1da177e4 1735 if (status != 0)
c6d00e63 1736 goto err_opendata_put;
1da177e4 1737
24ac23ab 1738 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1739 status = PTR_ERR(state);
1740 if (IS_ERR(state))
c6d00e63 1741 goto err_opendata_put;
0df5dd4a 1742 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1743 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e
TM		 1744
1745 if (opendata->o_arg.open_flags & O_EXCL) {
1746 nfs4_exclusive_attrset(opendata, sattr);
1747
1748 nfs_fattr_init(opendata->o_res.f_attr);
1749 status = nfs4_do_setattr(state->inode, cred,
1750 opendata->o_res.f_attr, sattr,
1751 state);
1752 if (status == 0)
1753 nfs_setattr_update_inode(state->inode, sattr);
1754 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1755 }
c6d00e63 1756 nfs4_opendata_put(opendata);
1da177e4 1757 nfs4_put_state_owner(sp);
1da177e4
LT		 1758 *res = state;
1759 return 0;
c6d00e63
TM		 1760err_opendata_put:
1761 nfs4_opendata_put(opendata);
e56e0b78
TM		 1762err_put_state_owner:
1763 nfs4_put_state_owner(sp);
1da177e4 1764out_err:
1da177e4
LT		 1765 *res = NULL;
1766 return status;
1767}
1768
1769
dc0b027d 1770static 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		 1771{
1772 struct nfs4_exception exception = { };
1773 struct nfs4_state *res;
1774 int status;
1775
1776 do {
dc0b027d 1777 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1778 if (status == 0)
1779 break;
1780 /* NOTE: BAD_SEQID means the server and client disagree about the
1781 * book-keeping w.r.t. state-changing operations
1782 * (OPEN/CLOSE/LOCK/LOCKU...)
1783 * It is actually a sign of a bug on the client or on the server.
1784 *
1785 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1786 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1787 * have unhashed the old state_owner for us, and that we can
1788 * therefore safely retry using a new one. We should still warn
1789 * the user though...
1790 */
1791 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1792 printk(KERN_WARNING "NFS: v4 server %s "
1793 " returned a bad sequence-id error!\n",
1794 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1795 exception.retry = 1;
1796 continue;
1797 }
550f5747
TM		 1798 /*
1799 * BAD_STATEID on OPEN means that the server cancelled our
1800 * state before it received the OPEN_CONFIRM.
1801 * Recover by retrying the request as per the discussion
1802 * on Page 181 of RFC3530.
1803 */
1804 if (status == -NFS4ERR_BAD_STATEID) {
1805 exception.retry = 1;
1806 continue;
1807 }
aac00a8d
TM		 1808 if (status == -EAGAIN) {
1809 /* We must have found a delegation */
1810 exception.retry = 1;
1811 continue;
1812 }
1da177e4
LT		 1813 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1814 status, &exception));
1815 } while (exception.retry);
1816 return res;
1817}
1818
659bfcd6
TM		 1819static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1820 struct nfs_fattr *fattr, struct iattr *sattr,
1821 struct nfs4_state *state)
1da177e4 1822{
3e4f6290 1823 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1824 struct nfs_setattrargs arg = {
3e4f6290 1825 .fh = NFS_FH(inode),
1da177e4
LT		 1826 .iap = sattr,
1827 .server = server,
1828 .bitmask = server->attr_bitmask,
1829 };
1830 struct nfs_setattrres res = {
1831 .fattr = fattr,
1832 .server = server,
1833 };
1834 struct rpc_message msg = {
659bfcd6
TM		 1835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1836 .rpc_argp = &arg,
1837 .rpc_resp = &res,
1838 .rpc_cred = cred,
1da177e4 1839 };
26e976a8 1840 unsigned long timestamp = jiffies;
65e4308d 1841 int status;
1da177e4 1842
0e574af1 1843 nfs_fattr_init(fattr);
1da177e4 1844
3e4f6290
TM		 1845 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1846 /* Use that stateid */
1847 } else if (state != NULL) {
77041ed9 1848 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
08e9eac4 1849 } else
1da177e4
LT		 1850 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1851
7c513058 1852 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 1853 if (status == 0 && state != NULL)
1854 renew_lease(server, timestamp);
65e4308d 1855 return status;
1da177e4
LT		 1856}
1857
659bfcd6
TM		 1858static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1859 struct nfs_fattr *fattr, struct iattr *sattr,
1860 struct nfs4_state *state)
1da177e4 1861{
3e4f6290 1862 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1863 struct nfs4_exception exception = { };
1864 int err;
1865 do {
1866 err = nfs4_handle_exception(server,
659bfcd6 1867 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1868 &exception);
1869 } while (exception.retry);
1870 return err;
1871}
1872
1873struct nfs4_closedata {
4a35bd41 1874 struct path path;
1da177e4
LT		 1875 struct inode *inode;
1876 struct nfs4_state *state;
1877 struct nfs_closeargs arg;
1878 struct nfs_closeres res;
516a6af6 1879 struct nfs_fattr fattr;
26e976a8 1880 unsigned long timestamp;
f7e8917a
FI		 1881 bool roc;
1882 u32 roc_barrier;
1da177e4
LT		 1883};
1884
963d8fe5 1885static void nfs4_free_closedata(void *data)
9512135d 1886{
963d8fe5
TM		 1887 struct nfs4_closedata *calldata = data;
1888 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d 1889
f7e8917a
FI		 1890 if (calldata->roc)
1891 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 1892 nfs4_put_open_state(calldata->state);
1893 nfs_free_seqid(calldata->arg.seqid);
9512135d 1894 nfs4_put_state_owner(sp);
31f31db1 1895 path_put(&calldata->path);
9512135d
TM		 1896 kfree(calldata);
1897}
1898
88069f77
TM		 1899static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1900 fmode_t fmode)
1901{
1902 spin_lock(&state->owner->so_lock);
1903 if (!(fmode & FMODE_READ))
1904 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1905 if (!(fmode & FMODE_WRITE))
1906 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1907 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1908 spin_unlock(&state->owner->so_lock);
1909}
1910
963d8fe5 1911static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1912{
963d8fe5 1913 struct nfs4_closedata *calldata = data;
1da177e4 1914 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1915 struct nfs_server *server = NFS_SERVER(calldata->inode);
1916
14516c3a
TM		 1917 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1918 return;
1da177e4
LT		 1919 /* hmm. we are done with the inode, and in the process of freeing
1920 * the state_owner. we keep this around to process errors
1921 */
1da177e4
LT		 1922 switch (task->tk_status) {
1923 case 0:
f7e8917a
FI		 1924 if (calldata->roc)
1925 pnfs_roc_set_barrier(state->inode,
1926 calldata->roc_barrier);
45328c35 1927 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1928 renew_lease(server, calldata->timestamp);
88069f77
TM		 1929 nfs4_close_clear_stateid_flags(state,
1930 calldata->arg.fmode);
1da177e4
LT		 1931 break;
1932 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1933 case -NFS4ERR_OLD_STATEID:
1934 case -NFS4ERR_BAD_STATEID:
1da177e4 1935 case -NFS4ERR_EXPIRED:
dc0b027d 1936 if (calldata->arg.fmode == 0)
9e33bed5 1937 break;
1da177e4 1938 default:
72211dbe
TM		 1939 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1940 rpc_restart_call_prepare(task);
1da177e4 1941 }
72211dbe 1942 nfs_release_seqid(calldata->arg.seqid);
516a6af6 1943 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1944}
1945
4ce70ada 1946static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1947{
4ce70ada 1948 struct nfs4_closedata *calldata = data;
9512135d 1949 struct nfs4_state *state = calldata->state;
88069f77 1950 int call_close = 0;
9512135d 1951
963d8fe5 1952 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1953 return;
003707c7 1954
88069f77
TM		 1955 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1956 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 1957 spin_lock(&state->owner->so_lock);
003707c7 1958 /* Calculate the change in open mode */
e7616923 1959 if (state->n_rdwr == 0) {
003707c7 1960 if (state->n_rdonly == 0) {
88069f77
TM		 1961 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1962 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1963 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 1964 }
1965 if (state->n_wronly == 0) {
88069f77
TM		 1966 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1967 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1968 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 1969 }
e7616923 1970 }
4cecb76f 1971 spin_unlock(&state->owner->so_lock);
88069f77
TM		 1972
1973 if (!call_close) {
963d8fe5
TM		 1974 /* Note: exit _without_ calling nfs4_close_done */
1975 task->tk_action = NULL;
9512135d
TM		 1976 return;
1977 }
88069f77 1978
f7e8917a 1979 if (calldata->arg.fmode == 0) {
88069f77 1980 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a
FI		 1981 if (calldata->roc &&
1982 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1983 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1984 task, NULL);
1985 return;
1986 }
1987 }
88069f77 1988
516a6af6 1989 nfs_fattr_init(calldata->res.fattr);
26e976a8 1990 calldata->timestamp = jiffies;
035168ab 1991 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
19ddab06
AA		 1992 &calldata->arg.seq_args, &calldata->res.seq_res,
1993 1, task))
1994 return;
5138fde0 1995 rpc_call_start(task);
1da177e4
LT		 1996}
1997
963d8fe5 1998static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1999 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2000 .rpc_call_done = nfs4_close_done,
2001 .rpc_release = nfs4_free_closedata,
2002};
2003
1da177e4
LT		 2004/*
2005 * It is possible for data to be read/written from a mem-mapped file
2006 * after the sys_close call (which hits the vfs layer as a flush).
2007 * This means that we can't safely call nfsv4 close on a file until
2008 * the inode is cleared. This in turn means that we are not good
2009 * NFSv4 citizens - we do not indicate to the server to update the file's
2010 * share state even when we are done with one of the three share
2011 * stateid's in the inode.
2012 *
2013 * NOTE: Caller must be holding the sp->so_owner semaphore!
2014 */
f7e8917a 2015int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1da177e4 2016{
4a35bd41 2017 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2018 struct nfs4_closedata *calldata;
b39e625b
TM		 2019 struct nfs4_state_owner *sp = state->owner;
2020 struct rpc_task *task;
5138fde0
TM		 2021 struct rpc_message msg = {
2022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2023 .rpc_cred = state->owner->so_cred,
2024 };
c970aa85
TM		 2025 struct rpc_task_setup task_setup_data = {
2026 .rpc_client = server->client,
5138fde0 2027 .rpc_message = &msg,
c970aa85 2028 .callback_ops = &nfs4_close_ops,
101070ca 2029 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2030 .flags = RPC_TASK_ASYNC,
2031 };
9512135d 2032 int status = -ENOMEM;
1da177e4 2033
8535b2be 2034 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2035 if (calldata == NULL)
9512135d 2036 goto out;
4a35bd41 2037 calldata->inode = state->inode;
1da177e4 2038 calldata->state = state;
4a35bd41 2039 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2040 calldata->arg.stateid = &state->open_stateid;
1da177e4 2041 /* Serialization for the sequence id */
8535b2be 2042 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2043 if (calldata->arg.seqid == NULL)
2044 goto out_free_calldata;
dc0b027d 2045 calldata->arg.fmode = 0;
a65318bf 2046 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2047 calldata->res.fattr = &calldata->fattr;
c1d51931 2048 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2049 calldata->res.server = server;
f7e8917a 2050 calldata->roc = roc;
f6948697
AV		 2051 path_get(path);
2052 calldata->path = *path;
9512135d 2053
1174dd1f
TM		 2054 msg.rpc_argp = &calldata->arg;
2055 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2056 task_setup_data.callback_data = calldata;
2057 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2058 if (IS_ERR(task))
2059 return PTR_ERR(task);
a49c3c77
TM		 2060 status = 0;
2061 if (wait)
2062 status = rpc_wait_for_completion_task(task);
b39e625b 2063 rpc_put_task(task);
a49c3c77 2064 return status;
9512135d
TM		 2065out_free_calldata:
2066 kfree(calldata);
2067out:
f7e8917a
FI		 2068 if (roc)
2069 pnfs_roc_release(state->inode);
b39e625b
TM		 2070 nfs4_put_open_state(state);
2071 nfs4_put_state_owner(sp);
9512135d 2072 return status;
1da177e4
LT		 2073}
2074
2b484297 2075static struct inode *
cd9a1c0e 2076nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2077{
1da177e4 2078 struct nfs4_state *state;
1da177e4 2079
565277f6 2080 /* Protect against concurrent sillydeletes */
cd9a1c0e 2081 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
f46e0bd3
TM		 2082 if (IS_ERR(state))
2083 return ERR_CAST(state);
cd9a1c0e 2084 ctx->state = state;
f46e0bd3 2085 return igrab(state->inode);
1da177e4
LT		 2086}
2087
1185a552 2088static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2089{
2090 if (ctx->state == NULL)
2091 return;
2092 if (is_sync)
2093 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2094 else
2095 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2096}
1da177e4
LT		 2097
2098static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2099{
43652ad5
BH		 2100 struct nfs4_server_caps_arg args = {
2101 .fhandle = fhandle,
2102 };
1da177e4
LT		 2103 struct nfs4_server_caps_res res = {};
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2106 .rpc_argp = &args,
1da177e4
LT		 2107 .rpc_resp = &res,
2108 };
2109 int status;
2110
7c513058 2111 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2112 if (status == 0) {
2113 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2114 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2115 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2116 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2117 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2118 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2119 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2120 server->caps |= NFS_CAP_ACLS;
2121 if (res.has_links != 0)
2122 server->caps |= NFS_CAP_HARDLINKS;
2123 if (res.has_symlinks != 0)
2124 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2125 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2126 server->caps |= NFS_CAP_FILEID;
2127 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2128 server->caps |= NFS_CAP_MODE;
2129 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2130 server->caps |= NFS_CAP_NLINK;
2131 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2132 server->caps |= NFS_CAP_OWNER;
2133 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2134 server->caps |= NFS_CAP_OWNER_GROUP;
2135 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2136 server->caps |= NFS_CAP_ATIME;
2137 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2138 server->caps |= NFS_CAP_CTIME;
2139 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2140 server->caps |= NFS_CAP_MTIME;
2141
a65318bf
TM		 2142 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2143 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2144 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2145 server->acl_bitmask = res.acl_bitmask;
2146 }
cccef3b9 2147
1da177e4
LT		 2148 return status;
2149}
2150
55a97593 2151int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2152{
2153 struct nfs4_exception exception = { };
2154 int err;
2155 do {
2156 err = nfs4_handle_exception(server,
2157 _nfs4_server_capabilities(server, fhandle),
2158 &exception);
2159 } while (exception.retry);
2160 return err;
2161}
2162
2163static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2164 struct nfs_fsinfo *info)
2165{
1da177e4
LT		 2166 struct nfs4_lookup_root_arg args = {
2167 .bitmask = nfs4_fattr_bitmap,
2168 };
2169 struct nfs4_lookup_res res = {
2170 .server = server,
0e574af1 2171 .fattr = info->fattr,
1da177e4
LT		 2172 .fh = fhandle,
2173 };
2174 struct rpc_message msg = {
2175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2176 .rpc_argp = &args,
2177 .rpc_resp = &res,
2178 };
008f55d0 2179
0e574af1 2180 nfs_fattr_init(info->fattr);
7c513058 2181 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2182}
2183
2184static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2185 struct nfs_fsinfo *info)
2186{
2187 struct nfs4_exception exception = { };
2188 int err;
2189 do {
fb8a5ba8
BS		 2190 err = _nfs4_lookup_root(server, fhandle, info);
2191 switch (err) {
2192 case 0:
2193 case -NFS4ERR_WRONGSEC:
2194 break;
2195 default:
2196 err = nfs4_handle_exception(server, err, &exception);
2197 }
1da177e4
LT		 2198 } while (exception.retry);
2199 return err;
2200}
2201
8f70e95f
BS		 2202static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2203 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2204{
2205 struct rpc_auth *auth;
2206 int ret;
2207
2208 auth = rpcauth_create(flavor, server->client);
2209 if (!auth) {
2210 ret = -EIO;
2211 goto out;
2212 }
2213 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2214out:
2215 return ret;
2216}
2217
801a16dc 2218static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2219 struct nfs_fsinfo *info)
1da177e4 2220{
8f70e95f 2221 int i, len, status = 0;
0fabee24 2222 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2223
801a16dc
BS		 2224 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2225 flav_array[len] = RPC_AUTH_NULL;
2226 len += 1;
8f70e95f
BS		 2227
2228 for (i = 0; i < len; i++) {
2229 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2230 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2231 continue;
2232 break;
8f70e95f 2233 }
fb8a5ba8
BS		 2234 /*
2235 * -EACCESS could mean that the user doesn't have correct permissions
2236 * to access the mount. It could also mean that we tried to mount
2237 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2238 * existing mount programs don't handle -EACCES very well so it should
2239 * be mapped to -EPERM instead.
2240 */
2241 if (status == -EACCES)
2242 status = -EPERM;
801a16dc
BS		 2243 return status;
2244}
2245
2246/*
2247 * get the file handle for the "/" directory on the server
2248 */
2249static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2250 struct nfs_fsinfo *info)
2251{
2252 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2253 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2254 /*
2255 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2256 * by nfs4_map_errors() as this function exits.
2257 */
801a16dc 2258 status = nfs4_find_root_sec(server, fhandle, info);
1da177e4
LT		 2259 if (status == 0)
2260 status = nfs4_server_capabilities(server, fhandle);
2261 if (status == 0)
2262 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2263 return nfs4_map_errors(status);
1da177e4
LT		 2264}
2265
6b97fd3d
MN		 2266/*
2267 * Get locations and (maybe) other attributes of a referral.
2268 * Note that we'll actually follow the referral later when
2269 * we detect fsid mismatch in inode revalidation
2270 */
56659e99 2271static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2272{
2273 int status = -ENOMEM;
2274 struct page *page = NULL;
2275 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2276
2277 page = alloc_page(GFP_KERNEL);
2278 if (page == NULL)
2279 goto out;
2280 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2281 if (locations == NULL)
2282 goto out;
2283
c228fd3a 2284 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2285 if (status != 0)
2286 goto out;
2287 /* Make sure server returned a different fsid for the referral */
2288 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2289 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2290 status = -EIO;
2291 goto out;
2292 }
2293
2294 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2295 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2296 if (!fattr->mode)
2297 fattr->mode = S_IFDIR;
2298 memset(fhandle, 0, sizeof(struct nfs_fh));
2299out:
2300 if (page)
2301 __free_page(page);
5d7ca35a 2302 kfree(locations);
6b97fd3d
MN		 2303 return status;
2304}
2305
1da177e4
LT		 2306static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2307{
2308 struct nfs4_getattr_arg args = {
2309 .fh = fhandle,
2310 .bitmask = server->attr_bitmask,
2311 };
2312 struct nfs4_getattr_res res = {
2313 .fattr = fattr,
2314 .server = server,
2315 };
2316 struct rpc_message msg = {
2317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2318 .rpc_argp = &args,
2319 .rpc_resp = &res,
2320 };
2321
0e574af1 2322 nfs_fattr_init(fattr);
7c513058 2323 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2324}
2325
2326static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2327{
2328 struct nfs4_exception exception = { };
2329 int err;
2330 do {
2331 err = nfs4_handle_exception(server,
2332 _nfs4_proc_getattr(server, fhandle, fattr),
2333 &exception);
2334 } while (exception.retry);
2335 return err;
2336}
2337
2338/*
2339 * The file is not closed if it is opened due to the a request to change
2340 * the size of the file. The open call will not be needed once the
2341 * VFS layer lookup-intents are implemented.
2342 *
2343 * Close is called when the inode is destroyed.
2344 * If we haven't opened the file for O_WRONLY, we
2345 * need to in the size_change case to obtain a stateid.
2346 *
2347 * Got race?
2348 * Because OPEN is always done by name in nfsv4, it is
2349 * possible that we opened a different file by the same
2350 * name. We can recognize this race condition, but we
2351 * can't do anything about it besides returning an error.
2352 *
2353 * This will be fixed with VFS changes (lookup-intent).
2354 */
2355static int
2356nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2357 struct iattr *sattr)
2358{
08e9eac4 2359 struct inode *inode = dentry->d_inode;
659bfcd6 2360 struct rpc_cred *cred = NULL;
d530838b 2361 struct nfs4_state *state = NULL;
1da177e4
LT		 2362 int status;
2363
0e574af1 2364 nfs_fattr_init(fattr);
1da177e4 2365
d530838b 2366 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2367 if (sattr->ia_valid & ATTR_FILE) {
2368 struct nfs_open_context *ctx;
2369
2370 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2371 if (ctx) {
2372 cred = ctx->cred;
2373 state = ctx->state;
2374 }
659bfcd6 2375 }
08e9eac4 2376
659bfcd6 2377 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2378 if (status == 0)
2379 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2380 return status;
2381}
2382
7c513058
BS		 2383static int _nfs4_proc_lookupfh(struct rpc_clnt *clnt, struct nfs_server *server,
2384 const struct nfs_fh *dirfh, const struct qstr *name,
2385 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2b3de441
DH		 2386{
2387 int status;
2388 struct nfs4_lookup_arg args = {
2389 .bitmask = server->attr_bitmask,
2390 .dir_fh = dirfh,
2391 .name = name,
2392 };
2393 struct nfs4_lookup_res res = {
2394 .server = server,
2395 .fattr = fattr,
2396 .fh = fhandle,
2397 };
2398 struct rpc_message msg = {
2399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2400 .rpc_argp = &args,
2401 .rpc_resp = &res,
2402 };
2403
2404 nfs_fattr_init(fattr);
2405
2406 dprintk("NFS call lookupfh %s\n", name->name);
7c513058 2407 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2b3de441 2408 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2409 return status;
2410}
2411
2412static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2413 struct qstr *name, struct nfs_fh *fhandle,
2414 struct nfs_fattr *fattr)
2415{
2416 struct nfs4_exception exception = { };
2417 int err;
2418 do {
7c513058 2419 err = _nfs4_proc_lookupfh(server->client, server, dirfh, name, fhandle, fattr);
4e56e082
TM		 2420 /* FIXME: !!!! */
2421 if (err == -NFS4ERR_MOVED) {
2422 err = -EREMOTE;
2423 break;
2424 }
2425 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2426 } while (exception.retry);
2427 return err;
2428}
2429
7c513058
BS		 2430static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2431 const struct qstr *name, struct nfs_fh *fhandle,
2432 struct nfs_fattr *fattr)
1da177e4 2433{
4e56e082 2434 int status;
1da177e4
LT		 2435
2436 dprintk("NFS call lookup %s\n", name->name);
7c513058 2437 status = _nfs4_proc_lookupfh(clnt, NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2438 if (status == -NFS4ERR_MOVED)
2439 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2440 dprintk("NFS reply lookup: %d\n", status);
2441 return status;
2442}
2443
7ebb9315
BS		 2444void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2445{
2446 memset(fh, 0, sizeof(struct nfs_fh));
2447 fattr->fsid.major = 1;
2448 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2449 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2450 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2451 fattr->nlink = 2;
2452}
2453
7c513058
BS		 2454static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2455 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1da177e4
LT		 2456{
2457 struct nfs4_exception exception = { };
2458 int err;
2459 do {
2460 err = nfs4_handle_exception(NFS_SERVER(dir),
7c513058 2461 _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr),
1da177e4 2462 &exception);
7ebb9315
BS		 2463 if (err == -EPERM)
2464 nfs_fixup_secinfo_attributes(fattr, fhandle);
1da177e4
LT		 2465 } while (exception.retry);
2466 return err;
2467}
2468
2469static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2470{
76b32999 2471 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2472 struct nfs4_accessargs args = {
2473 .fh = NFS_FH(inode),
76b32999
TM		 2474 .bitmask = server->attr_bitmask,
2475 };
2476 struct nfs4_accessres res = {
2477 .server = server,
1da177e4 2478 };
1da177e4
LT		 2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2481 .rpc_argp = &args,
2482 .rpc_resp = &res,
2483 .rpc_cred = entry->cred,
2484 };
2485 int mode = entry->mask;
2486 int status;
2487
2488 /*
2489 * Determine which access bits we want to ask for...
2490 */
2491 if (mode & MAY_READ)
2492 args.access |= NFS4_ACCESS_READ;
2493 if (S_ISDIR(inode->i_mode)) {
2494 if (mode & MAY_WRITE)
2495 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2496 if (mode & MAY_EXEC)
2497 args.access |= NFS4_ACCESS_LOOKUP;
2498 } else {
2499 if (mode & MAY_WRITE)
2500 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2501 if (mode & MAY_EXEC)
2502 args.access |= NFS4_ACCESS_EXECUTE;
2503 }
c407d41a
TM		 2504
2505 res.fattr = nfs_alloc_fattr();
2506 if (res.fattr == NULL)
2507 return -ENOMEM;
2508
7c513058 2509 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2510 if (!status) {
2511 entry->mask = 0;
2512 if (res.access & NFS4_ACCESS_READ)
2513 entry->mask |= MAY_READ;
2514 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2515 entry->mask |= MAY_WRITE;
2516 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2517 entry->mask |= MAY_EXEC;
c407d41a 2518 nfs_refresh_inode(inode, res.fattr);
1da177e4 2519 }
c407d41a 2520 nfs_free_fattr(res.fattr);
1da177e4
LT		 2521 return status;
2522}
2523
2524static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2525{
2526 struct nfs4_exception exception = { };
2527 int err;
2528 do {
2529 err = nfs4_handle_exception(NFS_SERVER(inode),
2530 _nfs4_proc_access(inode, entry),
2531 &exception);
2532 } while (exception.retry);
2533 return err;
2534}
2535
2536/*
2537 * TODO: For the time being, we don't try to get any attributes
2538 * along with any of the zero-copy operations READ, READDIR,
2539 * READLINK, WRITE.
2540 *
2541 * In the case of the first three, we want to put the GETATTR
2542 * after the read-type operation -- this is because it is hard
2543 * to predict the length of a GETATTR response in v4, and thus
2544 * align the READ data correctly. This means that the GETATTR
2545 * may end up partially falling into the page cache, and we should
2546 * shift it into the 'tail' of the xdr_buf before processing.
2547 * To do this efficiently, we need to know the total length
2548 * of data received, which doesn't seem to be available outside
2549 * of the RPC layer.
2550 *
2551 * In the case of WRITE, we also want to put the GETATTR after
2552 * the operation -- in this case because we want to make sure
2553 * we get the post-operation mtime and size. This means that
2554 * we can't use xdr_encode_pages() as written: we need a variant
2555 * of it which would leave room in the 'tail' iovec.
2556 *
2557 * Both of these changes to the XDR layer would in fact be quite
2558 * minor, but I decided to leave them for a subsequent patch.
2559 */
2560static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2561 unsigned int pgbase, unsigned int pglen)
2562{
2563 struct nfs4_readlink args = {
2564 .fh = NFS_FH(inode),
2565 .pgbase = pgbase,
2566 .pglen = pglen,
2567 .pages = &page,
2568 };
f50c7000 2569 struct nfs4_readlink_res res;
1da177e4
LT		 2570 struct rpc_message msg = {
2571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2572 .rpc_argp = &args,
f50c7000 2573 .rpc_resp = &res,
1da177e4
LT		 2574 };
2575
7c513058 2576 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2577}
2578
2579static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2580 unsigned int pgbase, unsigned int pglen)
2581{
2582 struct nfs4_exception exception = { };
2583 int err;
2584 do {
2585 err = nfs4_handle_exception(NFS_SERVER(inode),
2586 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2587 &exception);
2588 } while (exception.retry);
2589 return err;
2590}
2591
1da177e4
LT		 2592/*
2593 * Got race?
2594 * We will need to arrange for the VFS layer to provide an atomic open.
2595 * Until then, this create/open method is prone to inefficiency and race
2596 * conditions due to the lookup, create, and open VFS calls from sys_open()
2597 * placed on the wire.
2598 *
2599 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2600 * The file will be opened again in the subsequent VFS open call
2601 * (nfs4_proc_file_open).
2602 *
2603 * The open for read will just hang around to be used by any process that
2604 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2605 */
2606
2607static int
2608nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
c0204fd2 2609 int flags, struct nfs_open_context *ctx)
1da177e4 2610{
c0204fd2 2611 struct path my_path = {
ad389da7
TM		 2612 .dentry = dentry,
2613 };
c0204fd2 2614 struct path *path = &my_path;
1da177e4 2615 struct nfs4_state *state;
c0204fd2
TM		 2616 struct rpc_cred *cred = NULL;
2617 fmode_t fmode = 0;
1da177e4
LT		 2618 int status = 0;
2619
c0204fd2
TM		 2620 if (ctx != NULL) {
2621 cred = ctx->cred;
2622 path = &ctx->path;
2623 fmode = ctx->mode;
1da177e4 2624 }
a8a5da99 2625 sattr->ia_mode &= ~current_umask();
c0204fd2 2626 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
d4d9cdcb 2627 d_drop(dentry);
1da177e4
LT		 2628 if (IS_ERR(state)) {
2629 status = PTR_ERR(state);
c0204fd2 2630 goto out;
1da177e4 2631 }
d4d9cdcb 2632 d_add(dentry, igrab(state->inode));
d75340cc 2633 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
c0204fd2
TM		 2634 if (ctx != NULL)
2635 ctx->state = state;
02a913a7 2636 else
c0204fd2 2637 nfs4_close_sync(path, state, fmode);
1da177e4
LT		 2638out:
2639 return status;
2640}
2641
2642static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2643{
16e42959 2644 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2645 struct nfs_removeargs args = {
1da177e4 2646 .fh = NFS_FH(dir),
4fdc17b2
TM		 2647 .name.len = name->len,
2648 .name.name = name->name,
16e42959
TM		 2649 .bitmask = server->attr_bitmask,
2650 };
4fdc17b2 2651 struct nfs_removeres res = {
16e42959 2652 .server = server,
1da177e4 2653 };
1da177e4 2654 struct rpc_message msg = {
4fdc17b2
TM		 2655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2656 .rpc_argp = &args,
2657 .rpc_resp = &res,
1da177e4 2658 };
d346890b
TM		 2659 int status = -ENOMEM;
2660
2661 res.dir_attr = nfs_alloc_fattr();
2662 if (res.dir_attr == NULL)
2663 goto out;
1da177e4 2664
7c513058 2665 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
16e42959
TM		 2666 if (status == 0) {
2667 update_changeattr(dir, &res.cinfo);
d346890b 2668 nfs_post_op_update_inode(dir, res.dir_attr);
16e42959 2669 }
d346890b
TM		 2670 nfs_free_fattr(res.dir_attr);
2671out:
1da177e4
LT		 2672 return status;
2673}
2674
2675static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2676{
2677 struct nfs4_exception exception = { };
2678 int err;
2679 do {
2680 err = nfs4_handle_exception(NFS_SERVER(dir),
2681 _nfs4_proc_remove(dir, name),
2682 &exception);
2683 } while (exception.retry);
2684 return err;
2685}
2686
e4eff1a6 2687static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2688{
e4eff1a6
TM		 2689 struct nfs_server *server = NFS_SERVER(dir);
2690 struct nfs_removeargs *args = msg->rpc_argp;
2691 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2692
a65318bf 2693 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2694 res->server = server;
dfb4f309 2695 res->seq_res.sr_slot = NULL;
1da177e4 2696 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2697}
2698
e4eff1a6 2699static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2700{
e4eff1a6
TM		 2701 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2702
14516c3a
TM		 2703 if (!nfs4_sequence_done(task, &res->seq_res))
2704 return 0;
9e33bed5 2705 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2706 return 0;
2707 update_changeattr(dir, &res->cinfo);
d346890b 2708 nfs_post_op_update_inode(dir, res->dir_attr);
e4eff1a6 2709 return 1;
1da177e4
LT		 2710}
2711
d3d4152a
JL		 2712static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2713{
2714 struct nfs_server *server = NFS_SERVER(dir);
2715 struct nfs_renameargs *arg = msg->rpc_argp;
2716 struct nfs_renameres *res = msg->rpc_resp;
2717
2718 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2719 arg->bitmask = server->attr_bitmask;
2720 res->server = server;
2721}
2722
2723static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2724 struct inode *new_dir)
2725{
2726 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2727
2728 if (!nfs4_sequence_done(task, &res->seq_res))
2729 return 0;
2730 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2731 return 0;
2732
2733 update_changeattr(old_dir, &res->old_cinfo);
2734 nfs_post_op_update_inode(old_dir, res->old_fattr);
2735 update_changeattr(new_dir, &res->new_cinfo);
2736 nfs_post_op_update_inode(new_dir, res->new_fattr);
2737 return 1;
2738}
2739
1da177e4
LT		 2740static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2741 struct inode *new_dir, struct qstr *new_name)
2742{
6caf2c82 2743 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2744 struct nfs_renameargs arg = {
1da177e4
LT		 2745 .old_dir = NFS_FH(old_dir),
2746 .new_dir = NFS_FH(new_dir),
2747 .old_name = old_name,
2748 .new_name = new_name,
6caf2c82
TM		 2749 .bitmask = server->attr_bitmask,
2750 };
e8582a8b 2751 struct nfs_renameres res = {
6caf2c82 2752 .server = server,
1da177e4 2753 };
1da177e4
LT		 2754 struct rpc_message msg = {
2755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2756 .rpc_argp = &arg,
2757 .rpc_resp = &res,
2758 };
011fff72 2759 int status = -ENOMEM;
1da177e4 2760
011fff72
TM		 2761 res.old_fattr = nfs_alloc_fattr();
2762 res.new_fattr = nfs_alloc_fattr();
2763 if (res.old_fattr == NULL || res.new_fattr == NULL)
2764 goto out;
1da177e4 2765
7c513058 2766 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 2767 if (!status) {
2768 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2769 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2770 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2771 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4 2772 }
011fff72
TM		 2773out:
2774 nfs_free_fattr(res.new_fattr);
2775 nfs_free_fattr(res.old_fattr);
1da177e4
LT		 2776 return status;
2777}
2778
2779static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2780 struct inode *new_dir, struct qstr *new_name)
2781{
2782 struct nfs4_exception exception = { };
2783 int err;
2784 do {
2785 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2786 _nfs4_proc_rename(old_dir, old_name,
2787 new_dir, new_name),
2788 &exception);
2789 } while (exception.retry);
2790 return err;
2791}
2792
2793static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2794{
91ba2eee 2795 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2796 struct nfs4_link_arg arg = {
2797 .fh = NFS_FH(inode),
2798 .dir_fh = NFS_FH(dir),
2799 .name = name,
91ba2eee
TM		 2800 .bitmask = server->attr_bitmask,
2801 };
91ba2eee
TM		 2802 struct nfs4_link_res res = {
2803 .server = server,
1da177e4 2804 };
1da177e4
LT		 2805 struct rpc_message msg = {
2806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2807 .rpc_argp = &arg,
91ba2eee 2808 .rpc_resp = &res,
1da177e4 2809 };
136f2627
TM		 2810 int status = -ENOMEM;
2811
2812 res.fattr = nfs_alloc_fattr();
2813 res.dir_attr = nfs_alloc_fattr();
2814 if (res.fattr == NULL || res.dir_attr == NULL)
2815 goto out;
1da177e4 2816
7c513058 2817 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 2818 if (!status) {
2819 update_changeattr(dir, &res.cinfo);
2820 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2821 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2822 }
136f2627
TM		 2823out:
2824 nfs_free_fattr(res.dir_attr);
2825 nfs_free_fattr(res.fattr);
1da177e4
LT		 2826 return status;
2827}
2828
2829static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2830{
2831 struct nfs4_exception exception = { };
2832 int err;
2833 do {
2834 err = nfs4_handle_exception(NFS_SERVER(inode),
2835 _nfs4_proc_link(inode, dir, name),
2836 &exception);
2837 } while (exception.retry);
2838 return err;
2839}
2840
57dc9a57
TM		 2841struct nfs4_createdata {
2842 struct rpc_message msg;
2843 struct nfs4_create_arg arg;
2844 struct nfs4_create_res res;
2845 struct nfs_fh fh;
2846 struct nfs_fattr fattr;
2847 struct nfs_fattr dir_fattr;
2848};
2849
2850static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2851 struct qstr *name, struct iattr *sattr, u32 ftype)
2852{
2853 struct nfs4_createdata *data;
2854
2855 data = kzalloc(sizeof(*data), GFP_KERNEL);
2856 if (data != NULL) {
2857 struct nfs_server *server = NFS_SERVER(dir);
2858
2859 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2860 data->msg.rpc_argp = &data->arg;
2861 data->msg.rpc_resp = &data->res;
2862 data->arg.dir_fh = NFS_FH(dir);
2863 data->arg.server = server;
2864 data->arg.name = name;
2865 data->arg.attrs = sattr;
2866 data->arg.ftype = ftype;
2867 data->arg.bitmask = server->attr_bitmask;
2868 data->res.server = server;
2869 data->res.fh = &data->fh;
2870 data->res.fattr = &data->fattr;
2871 data->res.dir_fattr = &data->dir_fattr;
2872 nfs_fattr_init(data->res.fattr);
2873 nfs_fattr_init(data->res.dir_fattr);
2874 }
2875 return data;
2876}
2877
2878static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2879{
7c513058 2880 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 2881 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 2882 if (status == 0) {
2883 update_changeattr(dir, &data->res.dir_cinfo);
2884 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2885 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2886 }
2887 return status;
2888}
2889
2890static void nfs4_free_createdata(struct nfs4_createdata *data)
2891{
2892 kfree(data);
2893}
2894
4f390c15 2895static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2896 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2897{
57dc9a57
TM		 2898 struct nfs4_createdata *data;
2899 int status = -ENAMETOOLONG;
1da177e4 2900
94a6d753 2901 if (len > NFS4_MAXPATHLEN)
57dc9a57 2902 goto out;
4f390c15 2903
57dc9a57
TM		 2904 status = -ENOMEM;
2905 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2906 if (data == NULL)
2907 goto out;
2908
2909 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2910 data->arg.u.symlink.pages = &page;
2911 data->arg.u.symlink.len = len;
1da177e4 2912
57dc9a57
TM		 2913 status = nfs4_do_create(dir, dentry, data);
2914
2915 nfs4_free_createdata(data);
2916out:
1da177e4
LT		 2917 return status;
2918}
2919
4f390c15 2920static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2921 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2922{
2923 struct nfs4_exception exception = { };
2924 int err;
2925 do {
2926 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2927 _nfs4_proc_symlink(dir, dentry, page,
2928 len, sattr),
1da177e4
LT		 2929 &exception);
2930 } while (exception.retry);
2931 return err;
2932}
2933
2934static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2935 struct iattr *sattr)
2936{
57dc9a57
TM		 2937 struct nfs4_createdata *data;
2938 int status = -ENOMEM;
1da177e4 2939
57dc9a57
TM		 2940 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2941 if (data == NULL)
2942 goto out;
2943
2944 status = nfs4_do_create(dir, dentry, data);
2945
2946 nfs4_free_createdata(data);
2947out:
1da177e4
LT		 2948 return status;
2949}
2950
2951static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2952 struct iattr *sattr)
2953{
2954 struct nfs4_exception exception = { };
2955 int err;
a8a5da99
AK		 2956
2957 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 2958 do {
2959 err = nfs4_handle_exception(NFS_SERVER(dir),
2960 _nfs4_proc_mkdir(dir, dentry, sattr),
2961 &exception);
2962 } while (exception.retry);
2963 return err;
2964}
2965
2966static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 2967 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 2968{
2969 struct inode *dir = dentry->d_inode;
2970 struct nfs4_readdir_arg args = {
2971 .fh = NFS_FH(dir),
56e4ebf8 2972 .pages = pages,
1da177e4
LT		 2973 .pgbase = 0,
2974 .count = count,
96d25e53 2975 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 2976 .plus = plus,
1da177e4
LT		 2977 };
2978 struct nfs4_readdir_res res;
2979 struct rpc_message msg = {
2980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2981 .rpc_argp = &args,
2982 .rpc_resp = &res,
2983 .rpc_cred = cred,
2984 };
2985 int status;
2986
3110ff80 2987 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2988 dentry->d_parent->d_name.name,
2989 dentry->d_name.name,
2990 (unsigned long long)cookie);
1da177e4
LT		 2991 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2992 res.pgbase = args.pgbase;
7c513058 2993 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 2994 if (status >= 0) {
1da177e4 2995 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 2996 status += args.pgbase;
2997 }
c4812998
TM		 2998
2999 nfs_invalidate_atime(dir);
3000
3110ff80 3001 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3002 return status;
3003}
3004
3005static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3006 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3007{
3008 struct nfs4_exception exception = { };
3009 int err;
3010 do {
3011 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3012 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3013 pages, count, plus),
1da177e4
LT		 3014 &exception);
3015 } while (exception.retry);
3016 return err;
3017}
3018
3019static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3020 struct iattr *sattr, dev_t rdev)
3021{
57dc9a57
TM		 3022 struct nfs4_createdata *data;
3023 int mode = sattr->ia_mode;
3024 int status = -ENOMEM;
1da177e4
LT		 3025
3026 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3027 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 3028
3029 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3030 if (data == NULL)
3031 goto out;
3032
1da177e4 3033 if (S_ISFIFO(mode))
57dc9a57 3034 data->arg.ftype = NF4FIFO;
1da177e4 3035 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3036 data->arg.ftype = NF4BLK;
3037 data->arg.u.device.specdata1 = MAJOR(rdev);
3038 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3039 }
3040 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3041 data->arg.ftype = NF4CHR;
3042 data->arg.u.device.specdata1 = MAJOR(rdev);
3043 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 3044 }
1da177e4 3045
57dc9a57
TM		 3046 status = nfs4_do_create(dir, dentry, data);
3047
3048 nfs4_free_createdata(data);
3049out:
1da177e4
LT		 3050 return status;
3051}
3052
3053static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3054 struct iattr *sattr, dev_t rdev)
3055{
3056 struct nfs4_exception exception = { };
3057 int err;
a8a5da99
AK		 3058
3059 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3060 do {
3061 err = nfs4_handle_exception(NFS_SERVER(dir),
3062 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3063 &exception);
3064 } while (exception.retry);
3065 return err;
3066}
3067
3068static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3069 struct nfs_fsstat *fsstat)
3070{
3071 struct nfs4_statfs_arg args = {
3072 .fh = fhandle,
3073 .bitmask = server->attr_bitmask,
3074 };
24ad148a
BH		 3075 struct nfs4_statfs_res res = {
3076 .fsstat = fsstat,
3077 };
1da177e4
LT		 3078 struct rpc_message msg = {
3079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3080 .rpc_argp = &args,
24ad148a 3081 .rpc_resp = &res,
1da177e4
LT		 3082 };
3083
0e574af1 3084 nfs_fattr_init(fsstat->fattr);
7c513058 3085 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3086}
3087
3088static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3089{
3090 struct nfs4_exception exception = { };
3091 int err;
3092 do {
3093 err = nfs4_handle_exception(server,
3094 _nfs4_proc_statfs(server, fhandle, fsstat),
3095 &exception);
3096 } while (exception.retry);
3097 return err;
3098}
3099
3100static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3101 struct nfs_fsinfo *fsinfo)
3102{
3103 struct nfs4_fsinfo_arg args = {
3104 .fh = fhandle,
3105 .bitmask = server->attr_bitmask,
3106 };
3dda5e43
BH		 3107 struct nfs4_fsinfo_res res = {
3108 .fsinfo = fsinfo,
3109 };
1da177e4
LT		 3110 struct rpc_message msg = {
3111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3112 .rpc_argp = &args,
3dda5e43 3113 .rpc_resp = &res,
1da177e4
LT		 3114 };
3115
7c513058 3116 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3117}
3118
3119static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3120{
3121 struct nfs4_exception exception = { };
3122 int err;
3123
3124 do {
3125 err = nfs4_handle_exception(server,
3126 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3127 &exception);
3128 } while (exception.retry);
3129 return err;
3130}
3131
3132static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3133{
0e574af1 3134 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 3135 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3136}
3137
3138static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3139 struct nfs_pathconf *pathconf)
3140{
3141 struct nfs4_pathconf_arg args = {
3142 .fh = fhandle,
3143 .bitmask = server->attr_bitmask,
3144 };
d45b2989
BH		 3145 struct nfs4_pathconf_res res = {
3146 .pathconf = pathconf,
3147 };
1da177e4
LT		 3148 struct rpc_message msg = {
3149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3150 .rpc_argp = &args,
d45b2989 3151 .rpc_resp = &res,
1da177e4
LT		 3152 };
3153
3154 /* None of the pathconf attributes are mandatory to implement */
3155 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3156 memset(pathconf, 0, sizeof(*pathconf));
3157 return 0;
3158 }
3159
0e574af1 3160 nfs_fattr_init(pathconf->fattr);
7c513058 3161 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3162}
3163
3164static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3165 struct nfs_pathconf *pathconf)
3166{
3167 struct nfs4_exception exception = { };
3168 int err;
3169
3170 do {
3171 err = nfs4_handle_exception(server,
3172 _nfs4_proc_pathconf(server, fhandle, pathconf),
3173 &exception);
3174 } while (exception.retry);
3175 return err;
3176}
3177
cbdabc7f 3178static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3179{
ec06c096 3180 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3181
9e33bed5 3182 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
0110ee15 3183 nfs_restart_rpc(task, server->nfs_client);
ec06c096 3184 return -EAGAIN;
1da177e4 3185 }
8850df99
TM		 3186
3187 nfs_invalidate_atime(data->inode);
1da177e4 3188 if (task->tk_status > 0)
ec06c096
TM		 3189 renew_lease(server, data->timestamp);
3190 return 0;
1da177e4
LT		 3191}
3192
cbdabc7f
AA		 3193static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3194{
3195
3196 dprintk("--> %s\n", __func__);
3197
3198 if (!nfs4_sequence_done(task, &data->res.seq_res))
3199 return -EAGAIN;
3200
3201 return data->read_done_cb(task, data);
3202}
3203
bdc7f021 3204static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3205{
1da177e4 3206 data->timestamp = jiffies;
cbdabc7f 3207 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3208 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3209}
3210
cbdabc7f
AA		 3211/* Reset the the nfs_read_data to send the read to the MDS. */
3212void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3213{
3214 dprintk("%s Reset task for i/o through\n", __func__);
3215 put_lseg(data->lseg);
3216 data->lseg = NULL;
3217 /* offsets will differ in the dense stripe case */
3218 data->args.offset = data->mds_offset;
3219 data->ds_clp = NULL;
3220 data->args.fh = NFS_FH(data->inode);
3221 data->read_done_cb = nfs4_read_done_cb;
3222 task->tk_ops = data->mds_ops;
3223 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3224}
3225EXPORT_SYMBOL_GPL(nfs4_reset_read);
3226
b029bc9b 3227static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3228{
1da177e4
LT		 3229 struct inode *inode = data->inode;
3230
9e33bed5 3231 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
0110ee15 3232 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3233 return -EAGAIN;
1da177e4 3234 }
4f9838c7 3235 if (task->tk_status >= 0) {
1da177e4 3236 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3237 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3238 }
788e7a89 3239 return 0;
1da177e4
LT		 3240}
3241
b029bc9b
FI		 3242static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3243{
3244 if (!nfs4_sequence_done(task, &data->res.seq_res))
3245 return -EAGAIN;
3246 return data->write_done_cb(task, data);
3247}
3248
a69aef14
FI		 3249/* Reset the the nfs_write_data to send the write to the MDS. */
3250void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3251{
3252 dprintk("%s Reset task for i/o through\n", __func__);
3253 put_lseg(data->lseg);
3254 data->lseg = NULL;
3255 data->ds_clp = NULL;
3256 data->write_done_cb = nfs4_write_done_cb;
3257 data->args.fh = NFS_FH(data->inode);
3258 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3259 data->args.offset = data->mds_offset;
3260 data->res.fattr = &data->fattr;
3261 task->tk_ops = data->mds_ops;
3262 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3263}
3264EXPORT_SYMBOL_GPL(nfs4_reset_write);
3265
bdc7f021 3266static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3267{
bdc7f021
TM		 3268 struct nfs_server *server = NFS_SERVER(data->inode);
3269
7ffd1064
FI		 3270 if (data->lseg) {
3271 data->args.bitmask = NULL;
3272 data->res.fattr = NULL;
3273 } else
3274 data->args.bitmask = server->cache_consistency_bitmask;
b029bc9b
FI		 3275 if (!data->write_done_cb)
3276 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3277 data->res.server = server;
1da177e4
LT		 3278 data->timestamp = jiffies;
3279
bdc7f021 3280 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3281}
3282
5f452431 3283static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3284{
1da177e4 3285 struct inode *inode = data->inode;
14516c3a 3286
9e33bed5 3287 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
0110ee15 3288 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3289 return -EAGAIN;
1da177e4 3290 }
9e08a3c5 3291 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3292 return 0;
1da177e4
LT		 3293}
3294
5f452431
FI		 3295static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3296{
3297 if (!nfs4_sequence_done(task, &data->res.seq_res))
3298 return -EAGAIN;
3299 return data->write_done_cb(task, data);
3300}
3301
bdc7f021 3302static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3303{
788e7a89 3304 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce
FI		 3305
3306 if (data->lseg) {
3307 data->args.bitmask = NULL;
3308 data->res.fattr = NULL;
3309 } else
3310 data->args.bitmask = server->cache_consistency_bitmask;
5f452431
FI		 3311 if (!data->write_done_cb)
3312 data->write_done_cb = nfs4_commit_done_cb;
4f9838c7 3313 data->res.server = server;
bdc7f021 3314 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3315}
3316
9bc4e3ca
CL		 3317struct nfs4_renewdata {
3318 struct nfs_client *client;
3319 unsigned long timestamp;
3320};
3321
1da177e4
LT		 3322/*
3323 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3324 * standalone procedure for queueing an asynchronous RENEW.
3325 */
9bc4e3ca 3326static void nfs4_renew_release(void *calldata)
dc96aef9 3327{
9bc4e3ca
CL		 3328 struct nfs4_renewdata *data = calldata;
3329 struct nfs_client *clp = data->client;
dc96aef9 3330
0851de06
AB		 3331 if (atomic_read(&clp->cl_count) > 1)
3332 nfs4_schedule_state_renewal(clp);
3333 nfs_put_client(clp);
9bc4e3ca 3334 kfree(data);
dc96aef9
AB		 3335}
3336
9bc4e3ca 3337static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3338{
9bc4e3ca
CL		 3339 struct nfs4_renewdata *data = calldata;
3340 struct nfs_client *clp = data->client;
3341 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3342
3343 if (task->tk_status < 0) {
95baa25c
TM		 3344 /* Unless we're shutting down, schedule state recovery! */
3345 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
0400a6b0 3346 nfs4_schedule_lease_recovery(clp);
1da177e4
LT		 3347 return;
3348 }
452e9352 3349 do_renew_lease(clp, timestamp);
1da177e4
LT		 3350}
3351
963d8fe5
TM		 3352static const struct rpc_call_ops nfs4_renew_ops = {
3353 .rpc_call_done = nfs4_renew_done,
dc96aef9 3354 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3355};
3356
adfa6f98 3357int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3358{
3359 struct rpc_message msg = {
3360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3361 .rpc_argp = clp,
b4454fe1 3362 .rpc_cred = cred,
1da177e4 3363 };
9bc4e3ca 3364 struct nfs4_renewdata *data;
1da177e4 3365
0851de06
AB		 3366 if (!atomic_inc_not_zero(&clp->cl_count))
3367 return -EIO;
9bc4e3ca
CL		 3368 data = kmalloc(sizeof(*data), GFP_KERNEL);
3369 if (data == NULL)
3370 return -ENOMEM;
3371 data->client = clp;
3372 data->timestamp = jiffies;
1da177e4 3373 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3374 &nfs4_renew_ops, data);
1da177e4
LT		 3375}
3376
adfa6f98 3377int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3378{
3379 struct rpc_message msg = {
3380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3381 .rpc_argp = clp,
b4454fe1 3382 .rpc_cred = cred,
1da177e4
LT		 3383 };
3384 unsigned long now = jiffies;
3385 int status;
3386
3387 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3388 if (status < 0)
3389 return status;
452e9352 3390 do_renew_lease(clp, now);
1da177e4
LT		 3391 return 0;
3392}
3393
aa1870af
BF		 3394static inline int nfs4_server_supports_acls(struct nfs_server *server)
3395{
3396 return (server->caps & NFS_CAP_ACLS)
3397 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3398 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3399}
3400
3401/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3402 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3403 * the stack.
3404 */
3405#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3406
3407static void buf_to_pages(const void *buf, size_t buflen,
3408 struct page **pages, unsigned int *pgbase)
3409{
3410 const void *p = buf;
3411
3412 *pgbase = offset_in_page(buf);
3413 p -= *pgbase;
3414 while (p < buf + buflen) {
3415 *(pages++) = virt_to_page(p);
3416 p += PAGE_CACHE_SIZE;
3417 }
3418}
3419
e9e3d724
NH		 3420static int buf_to_pages_noslab(const void *buf, size_t buflen,
3421 struct page **pages, unsigned int *pgbase)
3422{
3423 struct page *newpage, **spages;
3424 int rc = 0;
3425 size_t len;
3426 spages = pages;
3427
3428 do {
43b7c3f0 3429 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
e9e3d724
NH		 3430 newpage = alloc_page(GFP_KERNEL);
3431
3432 if (newpage == NULL)
3433 goto unwind;
3434 memcpy(page_address(newpage), buf, len);
3435 buf += len;
3436 buflen -= len;
3437 *pages++ = newpage;
3438 rc++;
3439 } while (buflen != 0);
3440
3441 return rc;
3442
3443unwind:
3444 for(; rc > 0; rc--)
3445 __free_page(spages[rc-1]);
3446 return -ENOMEM;
3447}
3448
e50a1c2e
BF		 3449struct nfs4_cached_acl {
3450 int cached;
3451 size_t len;
3e9d4154 3452 char data[0];
e50a1c2e
BF		 3453};
3454
3455static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3456{
3457 struct nfs_inode *nfsi = NFS_I(inode);
3458
3459 spin_lock(&inode->i_lock);
3460 kfree(nfsi->nfs4_acl);
3461 nfsi->nfs4_acl = acl;
3462 spin_unlock(&inode->i_lock);
3463}
3464
3465static void nfs4_zap_acl_attr(struct inode *inode)
3466{
3467 nfs4_set_cached_acl(inode, NULL);
3468}
3469
3470static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3471{
3472 struct nfs_inode *nfsi = NFS_I(inode);
3473 struct nfs4_cached_acl *acl;
3474 int ret = -ENOENT;
3475
3476 spin_lock(&inode->i_lock);
3477 acl = nfsi->nfs4_acl;
3478 if (acl == NULL)
3479 goto out;
3480 if (buf == NULL) /* user is just asking for length */
3481 goto out_len;
3482 if (acl->cached == 0)
3483 goto out;
3484 ret = -ERANGE; /* see getxattr(2) man page */
3485 if (acl->len > buflen)
3486 goto out;
3487 memcpy(buf, acl->data, acl->len);
3488out_len:
3489 ret = acl->len;
3490out:
3491 spin_unlock(&inode->i_lock);
3492 return ret;
3493}
3494
3495static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3496{
3497 struct nfs4_cached_acl *acl;
3498
3499 if (buf && acl_len <= PAGE_SIZE) {
3500 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3501 if (acl == NULL)
3502 goto out;
3503 acl->cached = 1;
3504 memcpy(acl->data, buf, acl_len);
3505 } else {
3506 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3507 if (acl == NULL)
3508 goto out;
3509 acl->cached = 0;
3510 }
3511 acl->len = acl_len;
3512out:
3513 nfs4_set_cached_acl(inode, acl);
3514}
3515
16b4289c 3516static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3517{
aa1870af
BF		 3518 struct page *pages[NFS4ACL_MAXPAGES];
3519 struct nfs_getaclargs args = {
3520 .fh = NFS_FH(inode),
3521 .acl_pages = pages,
3522 .acl_len = buflen,
3523 };
663c79b3
BH		 3524 struct nfs_getaclres res = {
3525 .acl_len = buflen,
3526 };
e50a1c2e 3527 void *resp_buf;
aa1870af
BF		 3528 struct rpc_message msg = {
3529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3530 .rpc_argp = &args,
663c79b3 3531 .rpc_resp = &res,
aa1870af 3532 };
e50a1c2e 3533 struct page *localpage = NULL;
aa1870af
BF		 3534 int ret;
3535
e50a1c2e
BF		 3536 if (buflen < PAGE_SIZE) {
3537 /* As long as we're doing a round trip to the server anyway,
3538 * let's be prepared for a page of acl data. */
3539 localpage = alloc_page(GFP_KERNEL);
3540 resp_buf = page_address(localpage);
3541 if (localpage == NULL)
3542 return -ENOMEM;
3543 args.acl_pages[0] = localpage;
3544 args.acl_pgbase = 0;
663c79b3 3545 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3546 } else {
3547 resp_buf = buf;
3548 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3549 }
7c513058 3550 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3551 if (ret)
3552 goto out_free;
663c79b3
BH		 3553 if (res.acl_len > args.acl_len)
3554 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3555 else
663c79b3 3556 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3557 if (buf) {
3558 ret = -ERANGE;
663c79b3 3559 if (res.acl_len > buflen)
e50a1c2e
BF		 3560 goto out_free;
3561 if (localpage)
663c79b3 3562 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3563 }
663c79b3 3564 ret = res.acl_len;
e50a1c2e
BF		 3565out_free:
3566 if (localpage)
3567 __free_page(localpage);
aa1870af
BF		 3568 return ret;
3569}
3570
16b4289c
TM		 3571static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3572{
3573 struct nfs4_exception exception = { };
3574 ssize_t ret;
3575 do {
3576 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3577 if (ret >= 0)
3578 break;
3579 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3580 } while (exception.retry);
3581 return ret;
3582}
3583
e50a1c2e
BF		 3584static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3585{
3586 struct nfs_server *server = NFS_SERVER(inode);
3587 int ret;
3588
3589 if (!nfs4_server_supports_acls(server))
3590 return -EOPNOTSUPP;
3591 ret = nfs_revalidate_inode(server, inode);
3592 if (ret < 0)
3593 return ret;
08a22b39
AK		 3594 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3595 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3596 ret = nfs4_read_cached_acl(inode, buf, buflen);
3597 if (ret != -ENOENT)
3598 return ret;
3599 return nfs4_get_acl_uncached(inode, buf, buflen);
3600}
3601
16b4289c 3602static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3603{
3604 struct nfs_server *server = NFS_SERVER(inode);
3605 struct page *pages[NFS4ACL_MAXPAGES];
3606 struct nfs_setaclargs arg = {
3607 .fh = NFS_FH(inode),
3608 .acl_pages = pages,
3609 .acl_len = buflen,
3610 };
73c403a9 3611 struct nfs_setaclres res;
4b580ee3
BF		 3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3614 .rpc_argp = &arg,
73c403a9 3615 .rpc_resp = &res,
4b580ee3 3616 };
e9e3d724 3617 int ret, i;
4b580ee3
BF		 3618
3619 if (!nfs4_server_supports_acls(server))
3620 return -EOPNOTSUPP;
e9e3d724
NH		 3621 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3622 if (i < 0)
3623 return i;
642ac549 3624 nfs_inode_return_delegation(inode);
7c513058 3625 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3626
3627 /*
3628 * Free each page after tx, so the only ref left is
3629 * held by the network stack
3630 */
3631 for (; i > 0; i--)
3632 put_page(pages[i-1]);
3633
08a22b39
AK		 3634 /*
3635 * Acl update can result in inode attribute update.
3636 * so mark the attribute cache invalid.
3637 */
3638 spin_lock(&inode->i_lock);
3639 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3640 spin_unlock(&inode->i_lock);
f41f7418
TM		 3641 nfs_access_zap_cache(inode);
3642 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3643 return ret;
3644}
3645
16b4289c
TM		 3646static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3647{
3648 struct nfs4_exception exception = { };
3649 int err;
3650 do {
3651 err = nfs4_handle_exception(NFS_SERVER(inode),
3652 __nfs4_proc_set_acl(inode, buf, buflen),
3653 &exception);
3654 } while (exception.retry);
3655 return err;
3656}
3657
1da177e4 3658static int
aa5190d0 3659nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3660{
aa5190d0
TM		 3661 struct nfs_client *clp = server->nfs_client;
3662
3663 if (task->tk_status >= 0)
1da177e4
LT		 3664 return 0;
3665 switch(task->tk_status) {
9e33bed5
TM		 3666 case -NFS4ERR_ADMIN_REVOKED:
3667 case -NFS4ERR_BAD_STATEID:
3668 case -NFS4ERR_OPENMODE:
3669 if (state == NULL)
3670 break;
0400a6b0
TM		 3671 nfs4_schedule_stateid_recovery(server, state);
3672 goto wait_on_recovery;
1da177e4 3673 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3674 case -NFS4ERR_STALE_CLIENTID:
1da177e4 3675 case -NFS4ERR_EXPIRED:
0400a6b0
TM		 3676 nfs4_schedule_lease_recovery(clp);
3677 goto wait_on_recovery;
4745e315
AA		 3678#if defined(CONFIG_NFS_V4_1)
3679 case -NFS4ERR_BADSESSION:
3680 case -NFS4ERR_BADSLOT:
3681 case -NFS4ERR_BAD_HIGH_SLOT:
3682 case -NFS4ERR_DEADSESSION:
3683 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3684 case -NFS4ERR_SEQ_FALSE_RETRY:
3685 case -NFS4ERR_SEQ_MISORDERED:
3686 dprintk("%s ERROR %d, Reset session\n", __func__,
3687 task->tk_status);
0400a6b0 3688 nfs4_schedule_session_recovery(clp->cl_session);
4745e315
AA		 3689 task->tk_status = 0;
3690 return -EAGAIN;
3691#endif /* CONFIG_NFS_V4_1 */
1da177e4 3692 case -NFS4ERR_DELAY:
aa5190d0 3693 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3694 case -NFS4ERR_GRACE:
2c643488 3695 case -EKEYEXPIRED:
1da177e4
LT		 3696 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3697 task->tk_status = 0;
3698 return -EAGAIN;
a8a4ae3a 3699 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3700 case -NFS4ERR_OLD_STATEID:
3701 task->tk_status = 0;
3702 return -EAGAIN;
3703 }
3704 task->tk_status = nfs4_map_errors(task->tk_status);
3705 return 0;
0400a6b0 3706wait_on_recovery:
a2c0b9e2 3707 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3708 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3709 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3710 task->tk_status = 0;
3711 return -EAGAIN;
1da177e4
LT		 3712}
3713
bb8b27e5
TM		 3714int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3715 unsigned short port, struct rpc_cred *cred,
3716 struct nfs4_setclientid_res *res)
1da177e4
LT		 3717{
3718 nfs4_verifier sc_verifier;
3719 struct nfs4_setclientid setclientid = {
3720 .sc_verifier = &sc_verifier,
3721 .sc_prog = program,
f4eecd5d 3722 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 3723 };
3724 struct rpc_message msg = {
3725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3726 .rpc_argp = &setclientid,
bb8b27e5 3727 .rpc_resp = res,
286d7d6a 3728 .rpc_cred = cred,
1da177e4 3729 };
bc4785cd 3730 __be32 *p;
1da177e4
LT		 3731 int loop = 0;
3732 int status;
3733
bc4785cd 3734 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3735 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3736 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3737
3738 for(;;) {
3739 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3740 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3741 clp->cl_ipaddr,
3742 rpc_peeraddr2str(clp->cl_rpcclient,
3743 RPC_DISPLAY_ADDR),
69dd716c
TM		 3744 rpc_peeraddr2str(clp->cl_rpcclient,
3745 RPC_DISPLAY_PROTO),
78ea323b 3746 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3747 clp->cl_id_uniquifier);
3748 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3749 sizeof(setclientid.sc_netid),
3750 rpc_peeraddr2str(clp->cl_rpcclient,
3751 RPC_DISPLAY_NETID));
1da177e4 3752 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3753 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3754 clp->cl_ipaddr, port >> 8, port & 255);
3755
1bd714f2 3756 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3757 if (status != -NFS4ERR_CLID_INUSE)
3758 break;
fd954ae1
TM		 3759 if (loop != 0) {
3760 ++clp->cl_id_uniquifier;
1da177e4 3761 break;
fd954ae1
TM		 3762 }
3763 ++loop;
3764 ssleep(clp->cl_lease_time / HZ + 1);
1da177e4
LT		 3765 }
3766 return status;
3767}
3768
fd954ae1 3769int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 3770 struct nfs4_setclientid_res *arg,
3771 struct rpc_cred *cred)
1da177e4
LT		 3772{
3773 struct nfs_fsinfo fsinfo;
3774 struct rpc_message msg = {
3775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 3776 .rpc_argp = arg,
1da177e4 3777 .rpc_resp = &fsinfo,
286d7d6a 3778 .rpc_cred = cred,
1da177e4
LT		 3779 };
3780 unsigned long now;
3781 int status;
3782
3783 now = jiffies;
1bd714f2 3784 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3785 if (status == 0) {
3786 spin_lock(&clp->cl_lock);
3787 clp->cl_lease_time = fsinfo.lease_time * HZ;
3788 clp->cl_last_renewal = now;
3789 spin_unlock(&clp->cl_lock);
3790 }
3791 return status;
3792}
3793
fe650407
TM		 3794struct nfs4_delegreturndata {
3795 struct nfs4_delegreturnargs args;
fa178f29 3796 struct nfs4_delegreturnres res;
fe650407
TM		 3797 struct nfs_fh fh;
3798 nfs4_stateid stateid;
26e976a8 3799 unsigned long timestamp;
fa178f29 3800 struct nfs_fattr fattr;
fe650407
TM		 3801 int rpc_status;
3802};
3803
fe650407
TM		 3804static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3805{
3806 struct nfs4_delegreturndata *data = calldata;
938e1010 3807
14516c3a
TM		 3808 if (!nfs4_sequence_done(task, &data->res.seq_res))
3809 return;
938e1010 3810
79708861
RL		 3811 switch (task->tk_status) {
3812 case -NFS4ERR_STALE_STATEID:
3813 case -NFS4ERR_EXPIRED:
3814 case 0:
fa178f29 3815 renew_lease(data->res.server, data->timestamp);
79708861
RL		 3816 break;
3817 default:
3818 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3819 -EAGAIN) {
3820 nfs_restart_rpc(task, data->res.server->nfs_client);
3821 return;
3822 }
3823 }
3824 data->rpc_status = task->tk_status;
fe650407
TM		 3825}
3826
3827static void nfs4_delegreturn_release(void *calldata)
3828{
fe650407
TM		 3829 kfree(calldata);
3830}
3831
938e1010
AA		 3832#if defined(CONFIG_NFS_V4_1)
3833static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3834{
3835 struct nfs4_delegreturndata *d_data;
3836
3837 d_data = (struct nfs4_delegreturndata *)data;
3838
035168ab 3839 if (nfs4_setup_sequence(d_data->res.server,
938e1010
AA		 3840 &d_data->args.seq_args,
3841 &d_data->res.seq_res, 1, task))
3842 return;
3843 rpc_call_start(task);
3844}
3845#endif /* CONFIG_NFS_V4_1 */
3846
c8d149f3 3847static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3848#if defined(CONFIG_NFS_V4_1)
3849 .rpc_call_prepare = nfs4_delegreturn_prepare,
3850#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3851 .rpc_call_done = nfs4_delegreturn_done,
3852 .rpc_release = nfs4_delegreturn_release,
3853};
3854
e6f81075 3855static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3856{
3857 struct nfs4_delegreturndata *data;
fa178f29 3858 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3859 struct rpc_task *task;
5138fde0
TM		 3860 struct rpc_message msg = {
3861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3862 .rpc_cred = cred,
3863 };
c970aa85
TM		 3864 struct rpc_task_setup task_setup_data = {
3865 .rpc_client = server->client,
5138fde0 3866 .rpc_message = &msg,
c970aa85
TM		 3867 .callback_ops = &nfs4_delegreturn_ops,
3868 .flags = RPC_TASK_ASYNC,
3869 };
e6f81075 3870 int status = 0;
fe650407 3871
8535b2be 3872 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 3873 if (data == NULL)
3874 return -ENOMEM;
3875 data->args.fhandle = &data->fh;
3876 data->args.stateid = &data->stateid;
fa178f29 3877 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3878 nfs_copy_fh(&data->fh, NFS_FH(inode));
3879 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3880 data->res.fattr = &data->fattr;
3881 data->res.server = server;
5138fde0 3882 nfs_fattr_init(data->res.fattr);
26e976a8 3883 data->timestamp = jiffies;
fe650407
TM		 3884 data->rpc_status = 0;
3885
c970aa85 3886 task_setup_data.callback_data = data;
1174dd1f
TM		 3887 msg.rpc_argp = &data->args;
3888 msg.rpc_resp = &data->res;
c970aa85 3889 task = rpc_run_task(&task_setup_data);
7a1218a2 3890 if (IS_ERR(task))
fe650407 3891 return PTR_ERR(task);
e6f81075
TM		 3892 if (!issync)
3893 goto out;
fe650407 3894 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3895 if (status != 0)
3896 goto out;
3897 status = data->rpc_status;
3898 if (status != 0)
3899 goto out;
3900 nfs_refresh_inode(inode, &data->fattr);
3901out:
e6b3c4db 3902 rpc_put_task(task);
fe650407 3903 return status;
1da177e4
LT		 3904}
3905
e6f81075 3906int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3907{
3908 struct nfs_server *server = NFS_SERVER(inode);
3909 struct nfs4_exception exception = { };
3910 int err;
3911 do {
e6f81075 3912 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3913 switch (err) {
3914 case -NFS4ERR_STALE_STATEID:
3915 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3916 case 0:
3917 return 0;
3918 }
3919 err = nfs4_handle_exception(server, err, &exception);
3920 } while (exception.retry);
3921 return err;
3922}
3923
3924#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3925#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3926
3927/*
3928 * sleep, with exponential backoff, and retry the LOCK operation.
3929 */
3930static unsigned long
3931nfs4_set_lock_task_retry(unsigned long timeout)
3932{
150030b7 3933 schedule_timeout_killable(timeout);
1da177e4
LT		 3934 timeout <<= 1;
3935 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3936 return NFS4_LOCK_MAXTIMEOUT;
3937 return timeout;
3938}
3939
1da177e4
LT		 3940static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3941{
3942 struct inode *inode = state->inode;
3943 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3944 struct nfs_client *clp = server->nfs_client;
911d1aaf 3945 struct nfs_lockt_args arg = {
1da177e4 3946 .fh = NFS_FH(inode),
911d1aaf 3947 .fl = request,
1da177e4 3948 };
911d1aaf
TM		 3949 struct nfs_lockt_res res = {
3950 .denied = request,
1da177e4
LT		 3951 };
3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3954 .rpc_argp = &arg,
3955 .rpc_resp = &res,
3956 .rpc_cred = state->owner->so_cred,
3957 };
1da177e4
LT		 3958 struct nfs4_lock_state *lsp;
3959 int status;
3960
911d1aaf 3961 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3962 status = nfs4_set_lock_state(state, request);
3963 if (status != 0)
3964 goto out;
3965 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3966 arg.lock_owner.id = lsp->ls_id.id;
d035c36c 3967 arg.lock_owner.s_dev = server->s_dev;
7c513058 3968 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 3969 switch (status) {
3970 case 0:
3971 request->fl_type = F_UNLCK;
3972 break;
3973 case -NFS4ERR_DENIED:
3974 status = 0;
1da177e4 3975 }
70cc6487 3976 request->fl_ops->fl_release_private(request);
8d0a8a9d 3977out:
1da177e4
LT		 3978 return status;
3979}
3980
3981static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3982{
3983 struct nfs4_exception exception = { };
3984 int err;
3985
3986 do {
3987 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3988 _nfs4_proc_getlk(state, cmd, request),
3989 &exception);
3990 } while (exception.retry);
3991 return err;
3992}
3993
3994static int do_vfs_lock(struct file *file, struct file_lock *fl)
3995{
3996 int res = 0;
3997 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3998 case FL_POSIX:
3999 res = posix_lock_file_wait(file, fl);
4000 break;
4001 case FL_FLOCK:
4002 res = flock_lock_file_wait(file, fl);
4003 break;
4004 default:
4005 BUG();
4006 }
1da177e4
LT		 4007 return res;
4008}
4009
faf5f49c 4010struct nfs4_unlockdata {
911d1aaf
TM		 4011 struct nfs_locku_args arg;
4012 struct nfs_locku_res res;
faf5f49c
TM		 4013 struct nfs4_lock_state *lsp;
4014 struct nfs_open_context *ctx;
911d1aaf
TM		 4015 struct file_lock fl;
4016 const struct nfs_server *server;
26e976a8 4017 unsigned long timestamp;
faf5f49c
TM		 4018};
4019
911d1aaf
TM		 4020static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4021 struct nfs_open_context *ctx,
4022 struct nfs4_lock_state *lsp,
4023 struct nfs_seqid *seqid)
4024{
4025 struct nfs4_unlockdata *p;
4026 struct inode *inode = lsp->ls_state->inode;
4027
8535b2be 4028 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4029 if (p == NULL)
4030 return NULL;
4031 p->arg.fh = NFS_FH(inode);
4032 p->arg.fl = &p->fl;
4033 p->arg.seqid = seqid;
c1d51931 4034 p->res.seqid = seqid;
911d1aaf
TM		 4035 p->arg.stateid = &lsp->ls_stateid;
4036 p->lsp = lsp;
4037 atomic_inc(&lsp->ls_count);
4038 /* Ensure we don't close file until we're done freeing locks! */
4039 p->ctx = get_nfs_open_context(ctx);
4040 memcpy(&p->fl, fl, sizeof(p->fl));
4041 p->server = NFS_SERVER(inode);
4042 return p;
4043}
4044
06f814a3 4045static void nfs4_locku_release_calldata(void *data)
faf5f49c 4046{
963d8fe5 4047 struct nfs4_unlockdata *calldata = data;
911d1aaf 4048 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4049 nfs4_put_lock_state(calldata->lsp);
4050 put_nfs_open_context(calldata->ctx);
4051 kfree(calldata);
faf5f49c
TM		 4052}
4053
963d8fe5 4054static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4055{
963d8fe5 4056 struct nfs4_unlockdata *calldata = data;
faf5f49c 4057
14516c3a
TM		 4058 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4059 return;
faf5f49c
TM		 4060 switch (task->tk_status) {
4061 case 0:
4062 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 4063 calldata->res.stateid.data,
faf5f49c 4064 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 4065 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4066 break;
9e33bed5
TM		 4067 case -NFS4ERR_BAD_STATEID:
4068 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4069 case -NFS4ERR_STALE_STATEID:
4070 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4071 break;
4072 default:
9e33bed5 4073 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
0110ee15 4074 nfs_restart_rpc(task,
d61e612a 4075 calldata->server->nfs_client);
faf5f49c 4076 }
faf5f49c
TM		 4077}
4078
4ce70ada 4079static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4080{
4ce70ada 4081 struct nfs4_unlockdata *calldata = data;
faf5f49c 4082
911d1aaf 4083 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 4084 return;
4085 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 4086 /* Note: exit _without_ running nfs4_locku_done */
4087 task->tk_action = NULL;
faf5f49c
TM		 4088 return;
4089 }
26e976a8 4090 calldata->timestamp = jiffies;
035168ab 4091 if (nfs4_setup_sequence(calldata->server,
a893693c
AA		 4092 &calldata->arg.seq_args,
4093 &calldata->res.seq_res, 1, task))
4094 return;
5138fde0 4095 rpc_call_start(task);
faf5f49c
TM		 4096}
4097
963d8fe5 4098static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4099 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4100 .rpc_call_done = nfs4_locku_done,
06f814a3 4101 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4102};
4103
a5d16a4d
TM		 4104static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4105 struct nfs_open_context *ctx,
4106 struct nfs4_lock_state *lsp,
4107 struct nfs_seqid *seqid)
4108{
4109 struct nfs4_unlockdata *data;
5138fde0
TM		 4110 struct rpc_message msg = {
4111 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4112 .rpc_cred = ctx->cred,
4113 };
c970aa85
TM		 4114 struct rpc_task_setup task_setup_data = {
4115 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4116 .rpc_message = &msg,
c970aa85 4117 .callback_ops = &nfs4_locku_ops,
101070ca 4118 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4119 .flags = RPC_TASK_ASYNC,
4120 };
a5d16a4d 4121
137d6aca
FF		 4122 /* Ensure this is an unlock - when canceling a lock, the
4123 * canceled lock is passed in, and it won't be an unlock.
4124 */
4125 fl->fl_type = F_UNLCK;
4126
a5d16a4d
TM		 4127 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4128 if (data == NULL) {
4129 nfs_free_seqid(seqid);
4130 return ERR_PTR(-ENOMEM);
4131 }
4132
1174dd1f
TM		 4133 msg.rpc_argp = &data->arg;
4134 msg.rpc_resp = &data->res;
c970aa85
TM		 4135 task_setup_data.callback_data = data;
4136 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4137}
4138
faf5f49c
TM		 4139static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4140{
19e03c57 4141 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4142 struct nfs_seqid *seqid;
1da177e4 4143 struct nfs4_lock_state *lsp;
06f814a3
TM		 4144 struct rpc_task *task;
4145 int status = 0;
536ff0f8 4146 unsigned char fl_flags = request->fl_flags;
faf5f49c 4147
8d0a8a9d 4148 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4149 /* Unlock _before_ we do the RPC call */
4150 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4151 down_read(&nfsi->rwsem);
4152 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4153 up_read(&nfsi->rwsem);
9b073574 4154 goto out;
19e03c57
TM		 4155 }
4156 up_read(&nfsi->rwsem);
8d0a8a9d 4157 if (status != 0)
9b073574
TM		 4158 goto out;
4159 /* Is this a delegated lock? */
4160 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4161 goto out;
8d0a8a9d 4162 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4163 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4164 status = -ENOMEM;
911d1aaf 4165 if (seqid == NULL)
9b073574 4166 goto out;
cd3758e3 4167 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4168 status = PTR_ERR(task);
4169 if (IS_ERR(task))
9b073574 4170 goto out;
a5d16a4d 4171 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4172 rpc_put_task(task);
9b073574 4173out:
536ff0f8 4174 request->fl_flags = fl_flags;
1da177e4
LT		 4175 return status;
4176}
4177
a5d16a4d
TM		 4178struct nfs4_lockdata {
4179 struct nfs_lock_args arg;
4180 struct nfs_lock_res res;
4181 struct nfs4_lock_state *lsp;
4182 struct nfs_open_context *ctx;
4183 struct file_lock fl;
26e976a8 4184 unsigned long timestamp;
a5d16a4d
TM		 4185 int rpc_status;
4186 int cancelled;
66179efe 4187 struct nfs_server *server;
a5d16a4d
TM		 4188};
4189
4190static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4191 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4192 gfp_t gfp_mask)
1da177e4 4193{
a5d16a4d
TM		 4194 struct nfs4_lockdata *p;
4195 struct inode *inode = lsp->ls_state->inode;
1da177e4 4196 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4197
8535b2be 4198 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4199 if (p == NULL)
4200 return NULL;
4201
4202 p->arg.fh = NFS_FH(inode);
4203 p->arg.fl = &p->fl;
8535b2be 4204 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4205 if (p->arg.open_seqid == NULL)
4206 goto out_free;
8535b2be 4207 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4208 if (p->arg.lock_seqid == NULL)
2f74c0a0 4209 goto out_free_seqid;
a5d16a4d 4210 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4211 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 4212 p->arg.lock_owner.id = lsp->ls_id.id;
d035c36c 4213 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4214 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4215 p->lsp = lsp;
66179efe 4216 p->server = server;
a5d16a4d
TM		 4217 atomic_inc(&lsp->ls_count);
4218 p->ctx = get_nfs_open_context(ctx);
4219 memcpy(&p->fl, fl, sizeof(p->fl));
4220 return p;
2f74c0a0
TM		 4221out_free_seqid:
4222 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4223out_free:
4224 kfree(p);
4225 return NULL;
4226}
4227
4228static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4229{
4230 struct nfs4_lockdata *data = calldata;
4231 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4232
3110ff80 4233 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4234 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4235 return;
a5d16a4d
TM		 4236 /* Do we need to do an open_to_lock_owner? */
4237 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 4238 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4239 return;
a5d16a4d
TM		 4240 data->arg.open_stateid = &state->stateid;
4241 data->arg.new_lock_owner = 1;
c1d51931 4242 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4243 } else
4244 data->arg.new_lock_owner = 0;
26e976a8 4245 data->timestamp = jiffies;
035168ab
TM		 4246 if (nfs4_setup_sequence(data->server,
4247 &data->arg.seq_args,
66179efe
AA		 4248 &data->res.seq_res, 1, task))
4249 return;
5138fde0 4250 rpc_call_start(task);
3110ff80 4251 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 4252}
4253
b257957e
AB		 4254static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4255{
4256 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4257 nfs4_lock_prepare(task, calldata);
4258}
4259
a5d16a4d
TM		 4260static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4261{
4262 struct nfs4_lockdata *data = calldata;
4263
3110ff80 4264 dprintk("%s: begin!\n", __func__);
a5d16a4d 4265
14516c3a
TM		 4266 if (!nfs4_sequence_done(task, &data->res.seq_res))
4267 return;
66179efe 4268
a5d16a4d 4269 data->rpc_status = task->tk_status;
a5d16a4d 4270 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4271 if (data->rpc_status == 0)
4272 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4273 else
4274 goto out;
4275 }
4276 if (data->rpc_status == 0) {
4277 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4278 sizeof(data->lsp->ls_stateid.data));
4279 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 4280 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 4281 }
a5d16a4d 4282out:
3110ff80 4283 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4284}
4285
4286static void nfs4_lock_release(void *calldata)
4287{
4288 struct nfs4_lockdata *data = calldata;
4289
3110ff80 4290 dprintk("%s: begin!\n", __func__);
2f74c0a0 4291 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4292 if (data->cancelled != 0) {
4293 struct rpc_task *task;
4294 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4295 data->arg.lock_seqid);
4296 if (!IS_ERR(task))
bf294b41 4297 rpc_put_task_async(task);
3110ff80 4298 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4299 } else
4300 nfs_free_seqid(data->arg.lock_seqid);
4301 nfs4_put_lock_state(data->lsp);
4302 put_nfs_open_context(data->ctx);
4303 kfree(data);
3110ff80 4304 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4305}
4306
4307static const struct rpc_call_ops nfs4_lock_ops = {
4308 .rpc_call_prepare = nfs4_lock_prepare,
4309 .rpc_call_done = nfs4_lock_done,
4310 .rpc_release = nfs4_lock_release,
4311};
4312
b257957e
AB		 4313static const struct rpc_call_ops nfs4_recover_lock_ops = {
4314 .rpc_call_prepare = nfs4_recover_lock_prepare,
4315 .rpc_call_done = nfs4_lock_done,
4316 .rpc_release = nfs4_lock_release,
4317};
4318
2bee72a6
TM		 4319static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4320{
2bee72a6
TM		 4321 switch (error) {
4322 case -NFS4ERR_ADMIN_REVOKED:
4323 case -NFS4ERR_BAD_STATEID:
ecac799a 4324 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6
TM		 4325 if (new_lock_owner != 0 ||
4326 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
ecac799a 4327 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4328 break;
4329 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4330 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4331 case -NFS4ERR_EXPIRED:
4332 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4333 };
4334}
4335
afe6c27c 4336static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4337{
4338 struct nfs4_lockdata *data;
4339 struct rpc_task *task;
5138fde0
TM		 4340 struct rpc_message msg = {
4341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4342 .rpc_cred = state->owner->so_cred,
4343 };
c970aa85
TM		 4344 struct rpc_task_setup task_setup_data = {
4345 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4346 .rpc_message = &msg,
c970aa85 4347 .callback_ops = &nfs4_lock_ops,
101070ca 4348 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4349 .flags = RPC_TASK_ASYNC,
4350 };
a5d16a4d
TM		 4351 int ret;
4352
3110ff80 4353 dprintk("%s: begin!\n", __func__);
cd3758e3 4354 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4355 fl->fl_u.nfs4_fl.owner,
4356 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4357 if (data == NULL)
4358 return -ENOMEM;
4359 if (IS_SETLKW(cmd))
4360 data->arg.block = 1;
b257957e
AB		 4361 if (recovery_type > NFS_LOCK_NEW) {
4362 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4363 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4364 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4365 }
1174dd1f
TM		 4366 msg.rpc_argp = &data->arg;
4367 msg.rpc_resp = &data->res;
c970aa85
TM		 4368 task_setup_data.callback_data = data;
4369 task = rpc_run_task(&task_setup_data);
7a1218a2 4370 if (IS_ERR(task))
a5d16a4d 4371 return PTR_ERR(task);
a5d16a4d
TM		 4372 ret = nfs4_wait_for_completion_rpc_task(task);
4373 if (ret == 0) {
4374 ret = data->rpc_status;
2bee72a6
TM		 4375 if (ret)
4376 nfs4_handle_setlk_error(data->server, data->lsp,
4377 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4378 } else
4379 data->cancelled = 1;
e6b3c4db 4380 rpc_put_task(task);
3110ff80 4381 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4382 return ret;
1da177e4
LT		 4383}
4384
4385static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4386{
202b50dc
TM		 4387 struct nfs_server *server = NFS_SERVER(state->inode);
4388 struct nfs4_exception exception = { };
4389 int err;
4390
4391 do {
42a2d13e
TM		 4392 /* Cache the lock if possible... */
4393 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4394 return 0;
afe6c27c 4395 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4396 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4397 break;
4398 nfs4_handle_exception(server, err, &exception);
4399 } while (exception.retry);
4400 return err;
1da177e4
LT		 4401}
4402
4403static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4404{
202b50dc
TM		 4405 struct nfs_server *server = NFS_SERVER(state->inode);
4406 struct nfs4_exception exception = { };
4407 int err;
4408
6bfc93ef
TM		 4409 err = nfs4_set_lock_state(state, request);
4410 if (err != 0)
4411 return err;
202b50dc 4412 do {
42a2d13e
TM		 4413 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4414 return 0;
afe6c27c 4415 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4416 switch (err) {
4417 default:
4418 goto out;
4419 case -NFS4ERR_GRACE:
4420 case -NFS4ERR_DELAY:
4421 nfs4_handle_exception(server, err, &exception);
4422 err = 0;
4423 }
202b50dc 4424 } while (exception.retry);
a9ed2e25 4425out:
202b50dc 4426 return err;
1da177e4
LT		 4427}
4428
4429static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4430{
19e03c57 4431 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4432 unsigned char fl_flags = request->fl_flags;
8e469ebd 4433 int status = -ENOLCK;
1da177e4 4434
8e469ebd
TM		 4435 if ((fl_flags & FL_POSIX) &&
4436 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4437 goto out;
6bfc93ef 4438 /* Is this a delegated open? */
6bfc93ef
TM		 4439 status = nfs4_set_lock_state(state, request);
4440 if (status != 0)
4441 goto out;
01c3b861
TM		 4442 request->fl_flags |= FL_ACCESS;
4443 status = do_vfs_lock(request->fl_file, request);
4444 if (status < 0)
4445 goto out;
19e03c57 4446 down_read(&nfsi->rwsem);
01c3b861 4447 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4448 /* Yes: cache locks! */
01c3b861 4449 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4450 request->fl_flags = fl_flags & ~FL_SLEEP;
4451 status = do_vfs_lock(request->fl_file, request);
4452 goto out_unlock;
01c3b861 4453 }
afe6c27c 4454 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4455 if (status != 0)
01c3b861 4456 goto out_unlock;
6bfc93ef 4457 /* Note: we always want to sleep here! */
01c3b861 4458 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4459 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4460 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4461out_unlock:
19e03c57 4462 up_read(&nfsi->rwsem);
01c3b861
TM		 4463out:
4464 request->fl_flags = fl_flags;
1da177e4
LT		 4465 return status;
4466}
4467
4468static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4469{
4470 struct nfs4_exception exception = { };
4471 int err;
4472
4473 do {
965b5d67
TM		 4474 err = _nfs4_proc_setlk(state, cmd, request);
4475 if (err == -NFS4ERR_DENIED)
4476 err = -EAGAIN;
1da177e4 4477 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4478 err, &exception);
1da177e4
LT		 4479 } while (exception.retry);
4480 return err;
4481}
4482
4483static int
4484nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4485{
4486 struct nfs_open_context *ctx;
4487 struct nfs4_state *state;
4488 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4489 int status;
4490
4491 /* verify open state */
cd3758e3 4492 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4493 state = ctx->state;
4494
4495 if (request->fl_start < 0 || request->fl_end < 0)
4496 return -EINVAL;
4497
d953126a
TM		 4498 if (IS_GETLK(cmd)) {
4499 if (state != NULL)
4500 return nfs4_proc_getlk(state, F_GETLK, request);
4501 return 0;
4502 }
1da177e4
LT		 4503
4504 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4505 return -EINVAL;
4506
d953126a
TM		 4507 if (request->fl_type == F_UNLCK) {
4508 if (state != NULL)
4509 return nfs4_proc_unlck(state, cmd, request);
4510 return 0;
4511 }
1da177e4 4512
d953126a
TM		 4513 if (state == NULL)
4514 return -ENOLCK;
1da177e4
LT		 4515 do {
4516 status = nfs4_proc_setlk(state, cmd, request);
4517 if ((status != -EAGAIN) || IS_SETLK(cmd))
4518 break;
4519 timeout = nfs4_set_lock_task_retry(timeout);
4520 status = -ERESTARTSYS;
4521 if (signalled())
4522 break;
4523 } while(status < 0);
1da177e4
LT		 4524 return status;
4525}
4526
888e694c
TM		 4527int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4528{
4529 struct nfs_server *server = NFS_SERVER(state->inode);
4530 struct nfs4_exception exception = { };
4531 int err;
4532
4533 err = nfs4_set_lock_state(state, fl);
4534 if (err != 0)
4535 goto out;
4536 do {
afe6c27c 4537 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4538 switch (err) {
4539 default:
4540 printk(KERN_ERR "%s: unhandled error %d.\n",
4541 __func__, err);
4542 case 0:
965b5d67 4543 case -ESTALE:
d5122201
TM		 4544 goto out;
4545 case -NFS4ERR_EXPIRED:
4546 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4547 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4548 nfs4_schedule_lease_recovery(server->nfs_client);
4549 goto out;
74e7bb73
RL		 4550 case -NFS4ERR_BADSESSION:
4551 case -NFS4ERR_BADSLOT:
4552 case -NFS4ERR_BAD_HIGH_SLOT:
4553 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4554 case -NFS4ERR_DEADSESSION:
0400a6b0 4555 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
d5122201 4556 goto out;
965b5d67
TM		 4557 case -ERESTARTSYS:
4558 /*
4559 * The show must go on: exit, but mark the
4560 * stateid as needing recovery.
4561 */
4562 case -NFS4ERR_ADMIN_REVOKED:
4563 case -NFS4ERR_BAD_STATEID:
4564 case -NFS4ERR_OPENMODE:
0400a6b0 4565 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4566 err = 0;
4567 goto out;
168667c4
TM		 4568 case -EKEYEXPIRED:
4569 /*
4570 * User RPCSEC_GSS context has expired.
4571 * We cannot recover this stateid now, so
4572 * skip it and allow recovery thread to
4573 * proceed.
4574 */
4575 err = 0;
4576 goto out;
965b5d67
TM		 4577 case -ENOMEM:
4578 case -NFS4ERR_DENIED:
4579 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4580 err = 0;
4581 goto out;
d5122201
TM		 4582 case -NFS4ERR_DELAY:
4583 break;
4584 }
888e694c
TM		 4585 err = nfs4_handle_exception(server, err, &exception);
4586 } while (exception.retry);
4587out:
4588 return err;
4589}
6b3b5496 4590
d3c7b7cc
TM		 4591static void nfs4_release_lockowner_release(void *calldata)
4592{
4593 kfree(calldata);
4594}
4595
4596const struct rpc_call_ops nfs4_release_lockowner_ops = {
4597 .rpc_release = nfs4_release_lockowner_release,
4598};
4599
4600void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4601{
4602 struct nfs_server *server = lsp->ls_state->owner->so_server;
4603 struct nfs_release_lockowner_args *args;
4604 struct rpc_message msg = {
4605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4606 };
4607
4608 if (server->nfs_client->cl_mvops->minor_version != 0)
4609 return;
4610 args = kmalloc(sizeof(*args), GFP_NOFS);
4611 if (!args)
4612 return;
4613 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4614 args->lock_owner.id = lsp->ls_id.id;
d035c36c 4615 args->lock_owner.s_dev = server->s_dev;
d3c7b7cc
TM		 4616 msg.rpc_argp = args;
4617 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4618}
4619
aa1870af
BF		 4620#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4621
64c2ce8b
AK		 4622static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4623 const void *buf, size_t buflen,
4624 int flags, int type)
6b3b5496 4625{
64c2ce8b
AK		 4626 if (strcmp(key, "") != 0)
4627 return -EINVAL;
4b580ee3 4628
64c2ce8b 4629 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4630}
4631
64c2ce8b
AK		 4632static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4633 void *buf, size_t buflen, int type)
6b3b5496 4634{
64c2ce8b
AK		 4635 if (strcmp(key, "") != 0)
4636 return -EINVAL;
aa1870af 4637
64c2ce8b 4638 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 4639}
4640
64c2ce8b
AK		 4641static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4642 size_t list_len, const char *name,
4643 size_t name_len, int type)
6b3b5496 4644{
64c2ce8b 4645 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 4646
096455a2
BF		 4647 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4648 return 0;
64c2ce8b
AK		 4649
4650 if (list && len <= list_len)
4651 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 4652 return len;
6b3b5496
BF		 4653}
4654
69aaaae1
TM		 4655static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4656{
4657 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4658 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4659 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4660 return;
4661
4662 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4663 NFS_ATTR_FATTR_NLINK;
4664 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4665 fattr->nlink = 2;
4666}
4667
56659e99 4668int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4669 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4670{
4671 struct nfs_server *server = NFS_SERVER(dir);
4672 u32 bitmask[2] = {
361e624f
MN		 4673 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4674 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4675 };
4676 struct nfs4_fs_locations_arg args = {
4677 .dir_fh = NFS_FH(dir),
c228fd3a 4678 .name = name,
683b57b4
TM		 4679 .page = page,
4680 .bitmask = bitmask,
4681 };
22958463
BH		 4682 struct nfs4_fs_locations_res res = {
4683 .fs_locations = fs_locations,
4684 };
683b57b4
TM		 4685 struct rpc_message msg = {
4686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4687 .rpc_argp = &args,
22958463 4688 .rpc_resp = &res,
683b57b4
TM		 4689 };
4690 int status;
4691
3110ff80 4692 dprintk("%s: start\n", __func__);
c228fd3a 4693 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4694 fs_locations->server = server;
830b8e33 4695 fs_locations->nlocations = 0;
7c513058 4696 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
69aaaae1 4697 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4698 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4699 return status;
4700}
4701
5a5ea0d4
BS		 4702static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4703{
4704 int status;
4705 struct nfs4_secinfo_arg args = {
4706 .dir_fh = NFS_FH(dir),
4707 .name = name,
4708 };
4709 struct nfs4_secinfo_res res = {
4710 .flavors = flavors,
4711 };
4712 struct rpc_message msg = {
4713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4714 .rpc_argp = &args,
4715 .rpc_resp = &res,
4716 };
4717
4718 dprintk("NFS call secinfo %s\n", name->name);
4719 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4720 dprintk("NFS reply secinfo: %d\n", status);
4721 return status;
4722}
4723
4724int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4725{
4726 struct nfs4_exception exception = { };
4727 int err;
4728 do {
4729 err = nfs4_handle_exception(NFS_SERVER(dir),
4730 _nfs4_proc_secinfo(dir, name, flavors),
4731 &exception);
4732 } while (exception.retry);
4733 return err;
4734}
4735
557134a3 4736#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 4737/*
4738 * Check the exchange flags returned by the server for invalid flags, having
4739 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4740 * DS flags set.
4741 */
4742static int nfs4_check_cl_exchange_flags(u32 flags)
4743{
4744 if (flags & ~EXCHGID4_FLAG_MASK_R)
4745 goto out_inval;
4746 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4747 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4748 goto out_inval;
4749 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4750 goto out_inval;
4751 return NFS_OK;
4752out_inval:
4753 return -NFS4ERR_INVAL;
4754}
4755
99fe60d0
BH		 4756/*
4757 * nfs4_proc_exchange_id()
4758 *
4759 * Since the clientid has expired, all compounds using sessions
4760 * associated with the stale clientid will be returning
4761 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4762 * be in some phase of session reset.
4763 */
4d643d1d 4764int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4765{
4766 nfs4_verifier verifier;
4767 struct nfs41_exchange_id_args args = {
4768 .client = clp,
357f54d6 4769 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 4770 };
4771 struct nfs41_exchange_id_res res = {
4772 .client = clp,
4773 };
4774 int status;
4775 struct rpc_message msg = {
4776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4777 .rpc_argp = &args,
4778 .rpc_resp = &res,
4779 .rpc_cred = cred,
4780 };
4781 __be32 *p;
4782
4783 dprintk("--> %s\n", __func__);
4784 BUG_ON(clp == NULL);
a7b72103 4785
99fe60d0
BH		 4786 p = (u32 *)verifier.data;
4787 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4788 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4789 args.verifier = &verifier;
4790
c7a360b0
AA		 4791 args.id_len = scnprintf(args.id, sizeof(args.id),
4792 "%s/%s.%s/%u",
4793 clp->cl_ipaddr,
4794 init_utsname()->nodename,
4795 init_utsname()->domainname,
4796 clp->cl_rpcclient->cl_auth->au_flavor);
99fe60d0 4797
1bd714f2 4798 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c7a360b0
AA		 4799 if (!status)
4800 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
99fe60d0
BH		 4801 dprintk("<-- %s status= %d\n", __func__, status);
4802 return status;
4803}
4804
2050f0cc
AA		 4805struct nfs4_get_lease_time_data {
4806 struct nfs4_get_lease_time_args *args;
4807 struct nfs4_get_lease_time_res *res;
4808 struct nfs_client *clp;
4809};
4810
4811static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4812 void *calldata)
4813{
4814 int ret;
4815 struct nfs4_get_lease_time_data *data =
4816 (struct nfs4_get_lease_time_data *)calldata;
4817
4818 dprintk("--> %s\n", __func__);
689cf5c1 4819 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 4820 /* just setup sequence, do not trigger session recovery
4821 since we're invoked within one */
4822 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1
AB		 4823 &data->args->la_seq_args,
4824 &data->res->lr_seq_res, 0, task);
2050f0cc
AA		 4825
4826 BUG_ON(ret == -EAGAIN);
4827 rpc_call_start(task);
4828 dprintk("<-- %s\n", __func__);
4829}
4830
4831/*
4832 * Called from nfs4_state_manager thread for session setup, so don't recover
4833 * from sequence operation or clientid errors.
4834 */
4835static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4836{
4837 struct nfs4_get_lease_time_data *data =
4838 (struct nfs4_get_lease_time_data *)calldata;
4839
4840 dprintk("--> %s\n", __func__);
14516c3a
TM		 4841 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4842 return;
2050f0cc
AA		 4843 switch (task->tk_status) {
4844 case -NFS4ERR_DELAY:
4845 case -NFS4ERR_GRACE:
4846 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4847 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4848 task->tk_status = 0;
a8a4ae3a
AA		 4849 /* fall through */
4850 case -NFS4ERR_RETRY_UNCACHED_REP:
0110ee15 4851 nfs_restart_rpc(task, data->clp);
2050f0cc
AA		 4852 return;
4853 }
2050f0cc
AA		 4854 dprintk("<-- %s\n", __func__);
4855}
4856
4857struct rpc_call_ops nfs4_get_lease_time_ops = {
4858 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4859 .rpc_call_done = nfs4_get_lease_time_done,
4860};
4861
4862int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4863{
4864 struct rpc_task *task;
4865 struct nfs4_get_lease_time_args args;
4866 struct nfs4_get_lease_time_res res = {
4867 .lr_fsinfo = fsinfo,
4868 };
4869 struct nfs4_get_lease_time_data data = {
4870 .args = &args,
4871 .res = &res,
4872 .clp = clp,
4873 };
4874 struct rpc_message msg = {
4875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4876 .rpc_argp = &args,
4877 .rpc_resp = &res,
4878 };
4879 struct rpc_task_setup task_setup = {
4880 .rpc_client = clp->cl_rpcclient,
4881 .rpc_message = &msg,
4882 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 4883 .callback_data = &data,
4884 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 4885 };
4886 int status;
4887
2050f0cc
AA		 4888 dprintk("--> %s\n", __func__);
4889 task = rpc_run_task(&task_setup);
4890
4891 if (IS_ERR(task))
4892 status = PTR_ERR(task);
4893 else {
4894 status = task->tk_status;
4895 rpc_put_task(task);
4896 }
4897 dprintk("<-- %s return %d\n", __func__, status);
4898
4899 return status;
4900}
4901
b73dafa7
RL		 4902/*
4903 * Reset a slot table
4904 */
104aeba4
AA		 4905static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4906 int ivalue)
ac72b7b3 4907{
104aeba4 4908 struct nfs4_slot *new = NULL;
b73dafa7 4909 int i;
ac72b7b3
AA		 4910 int ret = 0;
4911
104aeba4
AA		 4912 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4913 max_reqs, tbl->max_slots);
ac72b7b3 4914
104aeba4
AA		 4915 /* Does the newly negotiated max_reqs match the existing slot table? */
4916 if (max_reqs != tbl->max_slots) {
4917 ret = -ENOMEM;
4918 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
8535b2be 4919 GFP_NOFS);
104aeba4
AA		 4920 if (!new)
4921 goto out;
4922 ret = 0;
4923 kfree(tbl->slots);
ac72b7b3
AA		 4924 }
4925 spin_lock(&tbl->slot_tbl_lock);
104aeba4
AA		 4926 if (new) {
4927 tbl->slots = new;
4928 tbl->max_slots = max_reqs;
4929 }
4930 for (i = 0; i < tbl->max_slots; ++i)
b73dafa7 4931 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4932 spin_unlock(&tbl->slot_tbl_lock);
4933 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4934 tbl, tbl->slots, tbl->max_slots);
4935out:
4936 dprintk("<-- %s: return %d\n", __func__, ret);
4937 return ret;
4938}
4939
b73dafa7
RL		 4940/*
4941 * Reset the forechannel and backchannel slot tables
4942 */
4943static int nfs4_reset_slot_tables(struct nfs4_session *session)
4944{
4945 int status;
4946
4947 status = nfs4_reset_slot_table(&session->fc_slot_table,
104aeba4 4948 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4949 if (status)
4950 return status;
4951
4952 status = nfs4_reset_slot_table(&session->bc_slot_table,
104aeba4 4953 session->bc_attrs.max_reqs, 0);
b73dafa7
RL		 4954 return status;
4955}
4956
f8625a6a
RL		 4957/* Destroy the slot table */
4958static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4959{
4960 if (session->fc_slot_table.slots != NULL) {
4961 kfree(session->fc_slot_table.slots);
4962 session->fc_slot_table.slots = NULL;
4963 }
4964 if (session->bc_slot_table.slots != NULL) {
4965 kfree(session->bc_slot_table.slots);
4966 session->bc_slot_table.slots = NULL;
4967 }
4968 return;
4969}
4970
fc931582
AA		 4971/*
4972 * Initialize slot table
4973 */
050047ce
RL		 4974static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4975 int max_slots, int ivalue)
fc931582 4976{
fc931582
AA		 4977 struct nfs4_slot *slot;
4978 int ret = -ENOMEM;
4979
4980 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4981
050047ce 4982 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582 4983
8535b2be 4984 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
fc931582
AA		 4985 if (!slot)
4986 goto out;
fc931582
AA		 4987 ret = 0;
4988
4989 spin_lock(&tbl->slot_tbl_lock);
fc931582
AA		 4990 tbl->max_slots = max_slots;
4991 tbl->slots = slot;
4992 tbl->highest_used_slotid = -1; /* no slot is currently used */
4993 spin_unlock(&tbl->slot_tbl_lock);
4994 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4995 tbl, tbl->slots, tbl->max_slots);
4996out:
4997 dprintk("<-- %s: return %d\n", __func__, ret);
4998 return ret;
fc931582
AA		 4999}
5000
050047ce
RL		 5001/*
5002 * Initialize the forechannel and backchannel tables
5003 */
5004static int nfs4_init_slot_tables(struct nfs4_session *session)
5005{
f26468fb
TM		 5006 struct nfs4_slot_table *tbl;
5007 int status = 0;
050047ce 5008
f26468fb
TM		 5009 tbl = &session->fc_slot_table;
5010 if (tbl->slots == NULL) {
5011 status = nfs4_init_slot_table(tbl,
5012 session->fc_attrs.max_reqs, 1);
5013 if (status)
5014 return status;
5015 }
050047ce 5016
f26468fb
TM		 5017 tbl = &session->bc_slot_table;
5018 if (tbl->slots == NULL) {
5019 status = nfs4_init_slot_table(tbl,
5020 session->bc_attrs.max_reqs, 0);
5021 if (status)
5022 nfs4_destroy_slot_tables(session);
5023 }
f8625a6a
RL		 5024
5025 return status;
557134a3
AA		 5026}
5027
5028struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5029{
5030 struct nfs4_session *session;
5031 struct nfs4_slot_table *tbl;
5032
8535b2be 5033 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
557134a3
AA		 5034 if (!session)
5035 return NULL;
76db6d95 5036
557134a3 5037 tbl = &session->fc_slot_table;
9dfdf404 5038 tbl->highest_used_slotid = -1;
557134a3 5039 spin_lock_init(&tbl->slot_tbl_lock);
689cf5c1 5040 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
42acd021 5041 init_completion(&tbl->complete);
f8625a6a
RL		 5042
5043 tbl = &session->bc_slot_table;
9dfdf404 5044 tbl->highest_used_slotid = -1;
f8625a6a
RL		 5045 spin_lock_init(&tbl->slot_tbl_lock);
5046 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
42acd021 5047 init_completion(&tbl->complete);
f8625a6a 5048
1055d76d
TM		 5049 session->session_state = 1<<NFS4_SESSION_INITING;
5050
557134a3
AA		 5051 session->clp = clp;
5052 return session;
5053}
5054
5055void nfs4_destroy_session(struct nfs4_session *session)
5056{
5a0ffe54
AA		 5057 nfs4_proc_destroy_session(session);
5058 dprintk("%s Destroy backchannel for xprt %p\n",
5059 __func__, session->clp->cl_rpcclient->cl_xprt);
5060 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5061 NFS41_BC_MIN_CALLBACKS);
f8625a6a 5062 nfs4_destroy_slot_tables(session);
557134a3
AA		 5063 kfree(session);
5064}
5065
fc931582
AA		 5066/*
5067 * Initialize the values to be used by the client in CREATE_SESSION
5068 * If nfs4_init_session set the fore channel request and response sizes,
5069 * use them.
5070 *
5071 * Set the back channel max_resp_sz_cached to zero to force the client to
5072 * always set csa_cachethis to FALSE because the current implementation
5073 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5074 */
5075static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5076{
5077 struct nfs4_session *session = args->client->cl_session;
5078 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5079 mxresp_sz = session->fc_attrs.max_resp_sz;
5080
5081 if (mxrqst_sz == 0)
5082 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5083 if (mxresp_sz == 0)
5084 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5085 /* Fore channel attributes */
5086 args->fc_attrs.headerpadsz = 0;
5087 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5088 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582
AA		 5089 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5090 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5091
5092 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5093 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5094 __func__,
5095 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5096 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5097
5098 /* Back channel attributes */
5099 args->bc_attrs.headerpadsz = 0;
5100 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5101 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5102 args->bc_attrs.max_resp_sz_cached = 0;
5103 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5104 args->bc_attrs.max_reqs = 1;
5105
5106 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5107 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5108 __func__,
5109 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5110 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5111 args->bc_attrs.max_reqs);
5112}
5113
43c2e885 5114static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5115{
43c2e885
BF		 5116 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5117 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5118
5119 if (rcvd->headerpadsz > sent->headerpadsz)
5120 return -EINVAL;
5121 if (rcvd->max_resp_sz > sent->max_resp_sz)
5122 return -EINVAL;
5123 /*
5124 * Our requested max_ops is the minimum we need; we're not
5125 * prepared to break up compounds into smaller pieces than that.
5126 * So, no point even trying to continue if the server won't
5127 * cooperate:
5128 */
5129 if (rcvd->max_ops < sent->max_ops)
5130 return -EINVAL;
5131 if (rcvd->max_reqs == 0)
5132 return -EINVAL;
5133 return 0;
8d35301d
AA		 5134}
5135
43c2e885
BF		 5136static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5137{
5138 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5139 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5140
43c2e885
BF		 5141 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5142 return -EINVAL;
5143 if (rcvd->max_resp_sz < sent->max_resp_sz)
5144 return -EINVAL;
5145 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5146 return -EINVAL;
5147 /* These would render the backchannel useless: */
5148 if (rcvd->max_ops == 0)
5149 return -EINVAL;
5150 if (rcvd->max_reqs == 0)
5151 return -EINVAL;
5152 return 0;
5153}
8d35301d 5154
8d35301d
AA		 5155static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5156 struct nfs4_session *session)
5157{
43c2e885 5158 int ret;
8d35301d 5159
43c2e885
BF		 5160 ret = nfs4_verify_fore_channel_attrs(args, session);
5161 if (ret)
5162 return ret;
5163 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5164}
5165
fc931582
AA		 5166static int _nfs4_proc_create_session(struct nfs_client *clp)
5167{
5168 struct nfs4_session *session = clp->cl_session;
5169 struct nfs41_create_session_args args = {
5170 .client = clp,
5171 .cb_program = NFS4_CALLBACK,
5172 };
5173 struct nfs41_create_session_res res = {
5174 .client = clp,
5175 };
5176 struct rpc_message msg = {
5177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5178 .rpc_argp = &args,
5179 .rpc_resp = &res,
5180 };
5181 int status;
5182
5183 nfs4_init_channel_attrs(&args);
0f91421e 5184 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5185
1bd714f2 5186 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5187
8d35301d
AA		 5188 if (!status)
5189 /* Verify the session's negotiated channel_attrs values */
5190 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5191 if (!status) {
5192 /* Increment the clientid slot sequence id */
5193 clp->cl_seqid++;
5194 }
5195
5196 return status;
5197}
5198
5199/*
5200 * Issues a CREATE_SESSION operation to the server.
5201 * It is the responsibility of the caller to verify the session is
5202 * expired before calling this routine.
5203 */
f26468fb 5204int nfs4_proc_create_session(struct nfs_client *clp)
fc931582
AA		 5205{
5206 int status;
5207 unsigned *ptr;
fc931582
AA		 5208 struct nfs4_session *session = clp->cl_session;
5209
5210 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5211
fd954ae1 5212 status = _nfs4_proc_create_session(clp);
fc931582
AA		 5213 if (status)
5214 goto out;
5215
f26468fb
TM		 5216 /* Init and reset the fore channel */
5217 status = nfs4_init_slot_tables(session);
5218 dprintk("slot table initialization returned %d\n", status);
5219 if (status)
5220 goto out;
5221 status = nfs4_reset_slot_tables(session);
5222 dprintk("slot table reset returned %d\n", status);
fc931582
AA		 5223 if (status)
5224 goto out;
5225
5226 ptr = (unsigned *)&session->sess_id.data[0];
5227 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5228 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5229out:
5230 dprintk("<-- %s\n", __func__);
5231 return status;
5232}
5233
0f3e66c6
AA		 5234/*
5235 * Issue the over-the-wire RPC DESTROY_SESSION.
5236 * The caller must serialize access to this routine.
5237 */
5238int nfs4_proc_destroy_session(struct nfs4_session *session)
5239{
5240 int status = 0;
5241 struct rpc_message msg;
5242
5243 dprintk("--> nfs4_proc_destroy_session\n");
5244
5245 /* session is still being setup */
5246 if (session->clp->cl_cons_state != NFS_CS_READY)
5247 return status;
5248
5249 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5250 msg.rpc_argp = session;
5251 msg.rpc_resp = NULL;
5252 msg.rpc_cred = NULL;
1bd714f2 5253 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5254
5255 if (status)
5256 printk(KERN_WARNING
5257 "Got error %d from the server on DESTROY_SESSION. "
5258 "Session has been destroyed regardless...\n", status);
5259
5260 dprintk("<-- nfs4_proc_destroy_session\n");
5261 return status;
5262}
5263
fccba804
TM		 5264int nfs4_init_session(struct nfs_server *server)
5265{
5266 struct nfs_client *clp = server->nfs_client;
2449ea2e 5267 struct nfs4_session *session;
68bf05ef 5268 unsigned int rsize, wsize;
fccba804
TM		 5269 int ret;
5270
5271 if (!nfs4_has_session(clp))
5272 return 0;
5273
1055d76d
TM		 5274 session = clp->cl_session;
5275 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5276 return 0;
5277
68bf05ef
AA		 5278 rsize = server->rsize;
5279 if (rsize == 0)
5280 rsize = NFS_MAX_FILE_IO_SIZE;
5281 wsize = server->wsize;
5282 if (wsize == 0)
5283 wsize = NFS_MAX_FILE_IO_SIZE;
5284
68bf05ef
AA		 5285 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5286 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
2449ea2e 5287
fccba804
TM		 5288 ret = nfs4_recover_expired_lease(server);
5289 if (!ret)
5290 ret = nfs4_check_client_ready(clp);
5291 return ret;
5292}
5293
d83217c1
AA		 5294int nfs4_init_ds_session(struct nfs_client *clp)
5295{
5296 struct nfs4_session *session = clp->cl_session;
5297 int ret;
5298
5299 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5300 return 0;
5301
5302 ret = nfs4_client_recover_expired_lease(clp);
5303 if (!ret)
5304 /* Test for the DS role */
5305 if (!is_ds_client(clp))
5306 ret = -ENODEV;
5307 if (!ret)
5308 ret = nfs4_check_client_ready(clp);
5309 return ret;
5310
5311}
5312EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5313
5314
fc01cea9
AA		 5315/*
5316 * Renew the cl_session lease.
5317 */
d5f8d3fe
TM		 5318struct nfs4_sequence_data {
5319 struct nfs_client *clp;
5320 struct nfs4_sequence_args args;
5321 struct nfs4_sequence_res res;
5322};
5323
dc96aef9
AB		 5324static void nfs41_sequence_release(void *data)
5325{
d5f8d3fe
TM		 5326 struct nfs4_sequence_data *calldata = data;
5327 struct nfs_client *clp = calldata->clp;
dc96aef9 5328
7135840f
AB		 5329 if (atomic_read(&clp->cl_count) > 1)
5330 nfs4_schedule_state_renewal(clp);
5331 nfs_put_client(clp);
d5f8d3fe 5332 kfree(calldata);
dc96aef9
AB		 5333}
5334
aa5190d0
TM		 5335static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5336{
5337 switch(task->tk_status) {
5338 case -NFS4ERR_DELAY:
aa5190d0
TM		 5339 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5340 return -EAGAIN;
5341 default:
0400a6b0 5342 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5343 }
5344 return 0;
5345}
5346
dc96aef9 5347static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5348{
d5f8d3fe
TM		 5349 struct nfs4_sequence_data *calldata = data;
5350 struct nfs_client *clp = calldata->clp;
fc01cea9 5351
14516c3a
TM		 5352 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5353 return;
fc01cea9
AA		 5354
5355 if (task->tk_status < 0) {
5356 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5357 if (atomic_read(&clp->cl_count) == 1)
5358 goto out;
fc01cea9 5359
aa5190d0
TM		 5360 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5361 rpc_restart_call_prepare(task);
fc01cea9
AA		 5362 return;
5363 }
5364 }
fc01cea9 5365 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5366out:
fc01cea9
AA		 5367 dprintk("<-- %s\n", __func__);
5368}
5369
5370static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5371{
d5f8d3fe
TM		 5372 struct nfs4_sequence_data *calldata = data;
5373 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5374 struct nfs4_sequence_args *args;
5375 struct nfs4_sequence_res *res;
5376
fc01cea9
AA		 5377 args = task->tk_msg.rpc_argp;
5378 res = task->tk_msg.rpc_resp;
5379
035168ab 5380 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
fc01cea9
AA		 5381 return;
5382 rpc_call_start(task);
5383}
5384
5385static const struct rpc_call_ops nfs41_sequence_ops = {
5386 .rpc_call_done = nfs41_sequence_call_done,
5387 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5388 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5389};
5390
71ac6da9 5391static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
fc01cea9 5392{
d5f8d3fe 5393 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5394 struct rpc_message msg = {
5395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5396 .rpc_cred = cred,
5397 };
71ac6da9
TM		 5398 struct rpc_task_setup task_setup_data = {
5399 .rpc_client = clp->cl_rpcclient,
5400 .rpc_message = &msg,
5401 .callback_ops = &nfs41_sequence_ops,
5402 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5403 };
fc01cea9 5404
7135840f 5405 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5406 return ERR_PTR(-EIO);
dfb4f309 5407 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5408 if (calldata == NULL) {
7135840f 5409 nfs_put_client(clp);
71ac6da9 5410 return ERR_PTR(-ENOMEM);
fc01cea9 5411 }
d5f8d3fe
TM		 5412 msg.rpc_argp = &calldata->args;
5413 msg.rpc_resp = &calldata->res;
5414 calldata->clp = clp;
71ac6da9 5415 task_setup_data.callback_data = calldata;
fc01cea9 5416
71ac6da9
TM		 5417 return rpc_run_task(&task_setup_data);
5418}
5419
5420static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5421{
5422 struct rpc_task *task;
5423 int ret = 0;
5424
5425 task = _nfs41_proc_sequence(clp, cred);
5426 if (IS_ERR(task))
5427 ret = PTR_ERR(task);
5428 else
bf294b41 5429 rpc_put_task_async(task);
71ac6da9
TM		 5430 dprintk("<-- %s status=%d\n", __func__, ret);
5431 return ret;
5432}
5433
5434static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5435{
5436 struct rpc_task *task;
5437 int ret;
5438
5439 task = _nfs41_proc_sequence(clp, cred);
5440 if (IS_ERR(task)) {
5441 ret = PTR_ERR(task);
5442 goto out;
5443 }
5444 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5445 if (!ret) {
5446 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5447
5448 if (task->tk_status == 0)
5449 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5450 ret = task->tk_status;
b4410c2f 5451 }
71ac6da9
TM		 5452 rpc_put_task(task);
5453out:
5454 dprintk("<-- %s status=%d\n", __func__, ret);
5455 return ret;
fc01cea9
AA		 5456}
5457
fce5c838
RL		 5458struct nfs4_reclaim_complete_data {
5459 struct nfs_client *clp;
5460 struct nfs41_reclaim_complete_args arg;
5461 struct nfs41_reclaim_complete_res res;
5462};
5463
5464static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5465{
5466 struct nfs4_reclaim_complete_data *calldata = data;
5467
b257957e 5468 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5469 if (nfs41_setup_sequence(calldata->clp->cl_session,
5470 &calldata->arg.seq_args,
fce5c838
RL		 5471 &calldata->res.seq_res, 0, task))
5472 return;
5473
5474 rpc_call_start(task);
5475}
5476
aa5190d0
TM		 5477static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5478{
5479 switch(task->tk_status) {
5480 case 0:
5481 case -NFS4ERR_COMPLETE_ALREADY:
5482 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5483 break;
5484 case -NFS4ERR_DELAY:
aa5190d0 5485 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5486 /* fall through */
5487 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5488 return -EAGAIN;
5489 default:
0400a6b0 5490 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5491 }
5492 return 0;
5493}
5494
fce5c838
RL		 5495static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5496{
5497 struct nfs4_reclaim_complete_data *calldata = data;
5498 struct nfs_client *clp = calldata->clp;
5499 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5500
5501 dprintk("--> %s\n", __func__);
14516c3a
TM		 5502 if (!nfs41_sequence_done(task, res))
5503 return;
fce5c838 5504
aa5190d0
TM		 5505 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5506 rpc_restart_call_prepare(task);
5507 return;
5508 }
fce5c838
RL		 5509 dprintk("<-- %s\n", __func__);
5510}
5511
5512static void nfs4_free_reclaim_complete_data(void *data)
5513{
5514 struct nfs4_reclaim_complete_data *calldata = data;
5515
5516 kfree(calldata);
5517}
5518
5519static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5520 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5521 .rpc_call_done = nfs4_reclaim_complete_done,
5522 .rpc_release = nfs4_free_reclaim_complete_data,
5523};
5524
5525/*
5526 * Issue a global reclaim complete.
5527 */
5528static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5529{
5530 struct nfs4_reclaim_complete_data *calldata;
5531 struct rpc_task *task;
5532 struct rpc_message msg = {
5533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5534 };
5535 struct rpc_task_setup task_setup_data = {
5536 .rpc_client = clp->cl_rpcclient,
5537 .rpc_message = &msg,
5538 .callback_ops = &nfs4_reclaim_complete_call_ops,
5539 .flags = RPC_TASK_ASYNC,
5540 };
5541 int status = -ENOMEM;
5542
5543 dprintk("--> %s\n", __func__);
8535b2be 5544 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5545 if (calldata == NULL)
5546 goto out;
5547 calldata->clp = clp;
5548 calldata->arg.one_fs = 0;
fce5c838
RL		 5549
5550 msg.rpc_argp = &calldata->arg;
5551 msg.rpc_resp = &calldata->res;
5552 task_setup_data.callback_data = calldata;
5553 task = rpc_run_task(&task_setup_data);
acf82b85 5554 if (IS_ERR(task)) {
fce5c838 5555 status = PTR_ERR(task);
acf82b85
DC		 5556 goto out;
5557 }
c34c32ea
AA		 5558 status = nfs4_wait_for_completion_rpc_task(task);
5559 if (status == 0)
5560 status = task->tk_status;
fce5c838 5561 rpc_put_task(task);
acf82b85 5562 return 0;
fce5c838
RL		 5563out:
5564 dprintk("<-- %s status=%d\n", __func__, status);
5565 return status;
5566}
b1f69b75
AA		 5567
5568static void
5569nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5570{
5571 struct nfs4_layoutget *lgp = calldata;
c31663d4 5572 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 5573
5574 dprintk("--> %s\n", __func__);
c31663d4
FI		 5575 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5576 * right now covering the LAYOUTGET we are about to send.
5577 * However, that is not so catastrophic, and there seems
5578 * to be no way to prevent it completely.
5579 */
b1f69b75
AA		 5580 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5581 &lgp->res.seq_res, 0, task))
5582 return;
cf7d63f1
FI		 5583 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5584 NFS_I(lgp->args.inode)->layout,
5585 lgp->args.ctx->state)) {
5586 rpc_exit(task, NFS4_OK);
5587 return;
5588 }
b1f69b75
AA		 5589 rpc_call_start(task);
5590}
5591
5592static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5593{
5594 struct nfs4_layoutget *lgp = calldata;
5595 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5596
5597 dprintk("--> %s\n", __func__);
5598
5599 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5600 return;
5601
5602 switch (task->tk_status) {
5603 case 0:
5604 break;
5605 case -NFS4ERR_LAYOUTTRYLATER:
5606 case -NFS4ERR_RECALLCONFLICT:
5607 task->tk_status = -NFS4ERR_DELAY;
5608 /* Fall through */
5609 default:
5610 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5611 rpc_restart_call_prepare(task);
5612 return;
5613 }
5614 }
b1f69b75
AA		 5615 dprintk("<-- %s\n", __func__);
5616}
5617
5618static void nfs4_layoutget_release(void *calldata)
5619{
5620 struct nfs4_layoutget *lgp = calldata;
5621
5622 dprintk("--> %s\n", __func__);
b1f69b75
AA		 5623 put_nfs_open_context(lgp->args.ctx);
5624 kfree(calldata);
5625 dprintk("<-- %s\n", __func__);
5626}
5627
5628static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5629 .rpc_call_prepare = nfs4_layoutget_prepare,
5630 .rpc_call_done = nfs4_layoutget_done,
5631 .rpc_release = nfs4_layoutget_release,
5632};
5633
5634int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5635{
5636 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5637 struct rpc_task *task;
5638 struct rpc_message msg = {
5639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5640 .rpc_argp = &lgp->args,
5641 .rpc_resp = &lgp->res,
5642 };
5643 struct rpc_task_setup task_setup_data = {
5644 .rpc_client = server->client,
5645 .rpc_message = &msg,
5646 .callback_ops = &nfs4_layoutget_call_ops,
5647 .callback_data = lgp,
5648 .flags = RPC_TASK_ASYNC,
5649 };
5650 int status = 0;
5651
5652 dprintk("--> %s\n", __func__);
5653
35124a09 5654 lgp->res.layoutp = &lgp->args.layout;
b1f69b75
AA		 5655 lgp->res.seq_res.sr_slot = NULL;
5656 task = rpc_run_task(&task_setup_data);
5657 if (IS_ERR(task))
5658 return PTR_ERR(task);
5659 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 5660 if (status == 0)
5661 status = task->tk_status;
5662 if (status == 0)
5663 status = pnfs_layout_process(lgp);
b1f69b75
AA		 5664 rpc_put_task(task);
5665 dprintk("<-- %s status=%d\n", __func__, status);
5666 return status;
5667}
5668
5669static int
5670_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5671{
5672 struct nfs4_getdeviceinfo_args args = {
5673 .pdev = pdev,
5674 };
5675 struct nfs4_getdeviceinfo_res res = {
5676 .pdev = pdev,
5677 };
5678 struct rpc_message msg = {
5679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5680 .rpc_argp = &args,
5681 .rpc_resp = &res,
5682 };
5683 int status;
5684
5685 dprintk("--> %s\n", __func__);
7c513058 5686 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 5687 dprintk("<-- %s status=%d\n", __func__, status);
5688
5689 return status;
5690}
5691
5692int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5693{
5694 struct nfs4_exception exception = { };
5695 int err;
5696
5697 do {
5698 err = nfs4_handle_exception(server,
5699 _nfs4_proc_getdeviceinfo(server, pdev),
5700 &exception);
5701 } while (exception.retry);
5702 return err;
5703}
5704EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5705
863a3c6c
AA		 5706static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5707{
5708 struct nfs4_layoutcommit_data *data = calldata;
5709 struct nfs_server *server = NFS_SERVER(data->args.inode);
5710
5711 if (nfs4_setup_sequence(server, &data->args.seq_args,
5712 &data->res.seq_res, 1, task))
5713 return;
5714 rpc_call_start(task);
5715}
5716
5717static void
5718nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5719{
5720 struct nfs4_layoutcommit_data *data = calldata;
5721 struct nfs_server *server = NFS_SERVER(data->args.inode);
5722
5723 if (!nfs4_sequence_done(task, &data->res.seq_res))
5724 return;
5725
5726 switch (task->tk_status) { /* Just ignore these failures */
5727 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5728 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5729 case NFS4ERR_BADLAYOUT: /* no layout */
5730 case NFS4ERR_GRACE: /* loca_recalim always false */
5731 task->tk_status = 0;
5732 }
5733
5734 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5735 nfs_restart_rpc(task, server->nfs_client);
5736 return;
5737 }
5738
5739 if (task->tk_status == 0)
5740 nfs_post_op_update_inode_force_wcc(data->args.inode,
5741 data->res.fattr);
5742}
5743
5744static void nfs4_layoutcommit_release(void *calldata)
5745{
5746 struct nfs4_layoutcommit_data *data = calldata;
5747
5748 /* Matched by references in pnfs_set_layoutcommit */
5749 put_lseg(data->lseg);
5750 put_rpccred(data->cred);
5751 kfree(data);
5752}
5753
5754static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5755 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5756 .rpc_call_done = nfs4_layoutcommit_done,
5757 .rpc_release = nfs4_layoutcommit_release,
5758};
5759
5760int
ef311537 5761nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 5762{
5763 struct rpc_message msg = {
5764 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5765 .rpc_argp = &data->args,
5766 .rpc_resp = &data->res,
5767 .rpc_cred = data->cred,
5768 };
5769 struct rpc_task_setup task_setup_data = {
5770 .task = &data->task,
5771 .rpc_client = NFS_CLIENT(data->args.inode),
5772 .rpc_message = &msg,
5773 .callback_ops = &nfs4_layoutcommit_ops,
5774 .callback_data = data,
5775 .flags = RPC_TASK_ASYNC,
5776 };
5777 struct rpc_task *task;
5778 int status = 0;
5779
5780 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
5781 "lbw: %llu inode %lu\n",
5782 data->task.tk_pid, sync,
5783 data->args.lastbytewritten,
5784 data->args.inode->i_ino);
5785
5786 task = rpc_run_task(&task_setup_data);
5787 if (IS_ERR(task))
5788 return PTR_ERR(task);
ef311537 5789 if (sync == false)
863a3c6c
AA		 5790 goto out;
5791 status = nfs4_wait_for_completion_rpc_task(task);
5792 if (status != 0)
5793 goto out;
5794 status = task->tk_status;
5795out:
5796 dprintk("%s: status %d\n", __func__, status);
5797 rpc_put_task(task);
5798 return status;
5799}
557134a3
AA		 5800#endif /* CONFIG_NFS_V4_1 */
5801
591d71cb 5802struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 5803 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 5804 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 5805 .recover_open = nfs4_open_reclaim,
5806 .recover_lock = nfs4_lock_reclaim,
591d71cb 5807 .establish_clid = nfs4_init_clientid,
90a16617 5808 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 5809};
5810
591d71cb
AA		 5811#if defined(CONFIG_NFS_V4_1)
5812struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5813 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5814 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5815 .recover_open = nfs4_open_reclaim,
5816 .recover_lock = nfs4_lock_reclaim,
4d643d1d 5817 .establish_clid = nfs41_init_clientid,
b4b82607 5818 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 5819 .reclaim_complete = nfs41_proc_reclaim_complete,
591d71cb
AA		 5820};
5821#endif /* CONFIG_NFS_V4_1 */
5822
5823struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5824 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5825 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5826 .recover_open = nfs4_open_expired,
5827 .recover_lock = nfs4_lock_expired,
5828 .establish_clid = nfs4_init_clientid,
90a16617 5829 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 5830};
5831
5832#if defined(CONFIG_NFS_V4_1)
5833struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 5834 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 5835 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 5836 .recover_open = nfs4_open_expired,
5837 .recover_lock = nfs4_lock_expired,
4d643d1d 5838 .establish_clid = nfs41_init_clientid,
b4b82607 5839 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 5840};
591d71cb 5841#endif /* CONFIG_NFS_V4_1 */
1da177e4 5842
29fba38b
BH		 5843struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5844 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 5845 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 5846 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 5847};
5848
5849#if defined(CONFIG_NFS_V4_1)
5850struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5851 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5852 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5853 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5854};
5855#endif
5856
97dc1359
TM		 5857static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5858 .minor_version = 0,
5859 .call_sync = _nfs4_call_sync,
e047a10c 5860 .validate_stateid = nfs4_validate_delegation_stateid,
c48f4f35
TM		 5861 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5862 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5863 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 5864};
5865
5866#if defined(CONFIG_NFS_V4_1)
5867static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5868 .minor_version = 1,
5869 .call_sync = _nfs4_call_sync_session,
e047a10c 5870 .validate_stateid = nfs41_validate_delegation_stateid,
c48f4f35
TM		 5871 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5872 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5873 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 5874};
5875#endif
5876
97dc1359
TM		 5877const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5878 [0] = &nfs_v4_0_minor_ops,
5879#if defined(CONFIG_NFS_V4_1)
5880 [1] = &nfs_v4_1_minor_ops,
5881#endif
5882};
5883
92e1d5be 5884static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5885 .permission = nfs_permission,
5886 .getattr = nfs_getattr,
5887 .setattr = nfs_setattr,
64c2ce8b
AK		 5888 .getxattr = generic_getxattr,
5889 .setxattr = generic_setxattr,
5890 .listxattr = generic_listxattr,
5891 .removexattr = generic_removexattr,
6b3b5496
BF		 5892};
5893
509de811 5894const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5895 .version = 4, /* protocol version */
5896 .dentry_ops = &nfs4_dentry_operations,
5897 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5898 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5899 .getroot = nfs4_proc_get_root,
5900 .getattr = nfs4_proc_getattr,
5901 .setattr = nfs4_proc_setattr,
2b3de441 5902 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5903 .lookup = nfs4_proc_lookup,
5904 .access = nfs4_proc_access,
5905 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5906 .create = nfs4_proc_create,
5907 .remove = nfs4_proc_remove,
5908 .unlink_setup = nfs4_proc_unlink_setup,
5909 .unlink_done = nfs4_proc_unlink_done,
5910 .rename = nfs4_proc_rename,
d3d4152a
JL		 5911 .rename_setup = nfs4_proc_rename_setup,
5912 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 5913 .link = nfs4_proc_link,
5914 .symlink = nfs4_proc_symlink,
5915 .mkdir = nfs4_proc_mkdir,
5916 .rmdir = nfs4_proc_remove,
5917 .readdir = nfs4_proc_readdir,
5918 .mknod = nfs4_proc_mknod,
5919 .statfs = nfs4_proc_statfs,
5920 .fsinfo = nfs4_proc_fsinfo,
5921 .pathconf = nfs4_proc_pathconf,
e9326dca 5922 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5923 .decode_dirent = nfs4_decode_dirent,
5924 .read_setup = nfs4_proc_read_setup,
ec06c096 5925 .read_done = nfs4_read_done,
1da177e4 5926 .write_setup = nfs4_proc_write_setup,
788e7a89 5927 .write_done = nfs4_write_done,
1da177e4 5928 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5929 .commit_done = nfs4_commit_done,
1da177e4 5930 .lock = nfs4_proc_lock,
e50a1c2e 5931 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5932 .close_context = nfs4_close_context,
2b484297 5933 .open_context = nfs4_atomic_open,
45a52a02 5934 .init_client = nfs4_init_client,
5a5ea0d4 5935 .secinfo = nfs4_proc_secinfo,
1da177e4
LT		 5936};
5937
64c2ce8b
AK		 5938static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5939 .prefix = XATTR_NAME_NFSV4_ACL,
5940 .list = nfs4_xattr_list_nfs4_acl,
5941 .get = nfs4_xattr_get_nfs4_acl,
5942 .set = nfs4_xattr_set_nfs4_acl,
5943};
5944
5945const struct xattr_handler *nfs4_xattr_handlers[] = {
5946 &nfs4_xattr_nfs4_acl_handler,
5947 NULL
5948};
5949
1da177e4
LT		 5950/*
5951 * Local variables:
5952 * c-basic-offset: 8
5953 * End:
5954 */
Linux 6.x block layer and io_uring tree(s)