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nfs41: remove nfs4_recover_session
[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>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
1da177e4 47#include <linux/namei.h>
02a913a7 48#include <linux/mount.h>
99fe60d0 49#include <linux/module.h>
5a0ffe54 50#include <linux/sunrpc/bc_xprt.h>
1da177e4 51
4ce79717 52#include "nfs4_fs.h"
1da177e4 53#include "delegation.h"
101070ca 54#include "internal.h"
006ea73e 55#include "iostat.h"
fc931582 56#include "callback.h"
1da177e4
LT		 57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
2066fe89 60#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
a78cb57a
TM		 63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 67static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 68static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 71
1da177e4 72/* Prevent leaks of NFSv4 errors into userland */
46f72f57 73static int nfs4_map_errors(int err)
1da177e4 74{
52567b03
TM		 75 if (err >= -1000)
76 return err;
77 switch (err) {
78 case -NFS4ERR_RESOURCE:
79 return -EREMOTEIO;
80 default:
1da177e4 81 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 82 __func__, -err);
52567b03 83 break;
1da177e4 84 }
52567b03 85 return -EIO;
1da177e4
LT		 86}
87
88/*
89 * This is our standard bitmap for GETATTR requests.
90 */
91const u32 nfs4_fattr_bitmap[2] = {
92 FATTR4_WORD0_TYPE
93 | FATTR4_WORD0_CHANGE
94 | FATTR4_WORD0_SIZE
95 | FATTR4_WORD0_FSID
96 | FATTR4_WORD0_FILEID,
97 FATTR4_WORD1_MODE
98 | FATTR4_WORD1_NUMLINKS
99 | FATTR4_WORD1_OWNER
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
106};
107
108const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
115};
116
4ce79717 117const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 118 FATTR4_WORD0_MAXLINK
119 | FATTR4_WORD0_MAXNAME,
120 0
121};
122
123const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
127 0
128};
129
830b8e33
MN		 130const u32 nfs4_fs_locations_bitmap[2] = {
131 FATTR4_WORD0_TYPE
132 | FATTR4_WORD0_CHANGE
133 | FATTR4_WORD0_SIZE
134 | FATTR4_WORD0_FSID
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
137 FATTR4_WORD1_MODE
138 | FATTR4_WORD1_NUMLINKS
139 | FATTR4_WORD1_OWNER
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
147};
148
bc4785cd 149static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 150 struct nfs4_readdir_arg *readdir)
151{
0dbb4c67 152 __be32 *start, *p;
1da177e4
LT		 153
154 BUG_ON(readdir->count < 80);
155 if (cookie > 2) {
b7ef1956 156 readdir->cookie = cookie;
1da177e4
LT		 157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
158 return;
159 }
160
161 readdir->cookie = 0;
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
163 if (cookie == 2)
164 return;
165
166 /*
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
171 * instead of 1 or 2.
172 */
0dbb4c67 173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 174
175 if (cookie == 0) {
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
181 p++;
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
4e769b93 185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 186 }
187
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
193 p++;
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
4e769b93 197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 198
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
202}
203
65de872e
TM		 204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
e005e804 210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 211 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
9e33bed5 238 struct nfs4_state *state = exception->state;
65de872e
TM		 239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
9e33bed5
TM		 245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
4745e315 258#if !defined(CONFIG_NFS_V4_1)
65de872e 259 break;
4745e315
AA		 260#else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
262 break;
263 /* FALLTHROUGH */
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
6df08189 273 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
4745e315 274 exception->retry = 1;
b9179237 275 break;
4745e315 276#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e 277 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
65de872e
TM		 285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
287 ret = nfs4_delay(server->client, &exception->timeout);
288 if (ret != 0)
289 break;
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
292 }
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
295}
296
297
26e976a8 298static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 299{
7539bbab 300 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
305}
306
cccef3b9
AA		 307#if defined(CONFIG_NFS_V4_1)
308
e2c4ab3c
AA		 309/*
310 * nfs4_free_slot - free a slot and efficiently update slot table.
311 *
312 * freeing a slot is trivially done by clearing its respective bit
313 * in the bitmap.
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
321 */
322static void
323nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
324{
325 int slotid = free_slotid;
326
327 spin_lock(&tbl->slot_tbl_lock);
328 /* clear used bit in bitmap */
329 __clear_bit(slotid, tbl->used_slots);
330
331 /* update highest_used_slotid when it is freed */
332 if (slotid == tbl->highest_used_slotid) {
333 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
334 if (slotid >= 0 && slotid < tbl->max_slots)
335 tbl->highest_used_slotid = slotid;
336 else
337 tbl->highest_used_slotid = -1;
338 }
339 rpc_wake_up_next(&tbl->slot_tbl_waitq);
340 spin_unlock(&tbl->slot_tbl_lock);
341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
342 free_slotid, tbl->highest_used_slotid);
343}
344
13615871
AA		 345void nfs41_sequence_free_slot(const struct nfs_client *clp,
346 struct nfs4_sequence_res *res)
347{
348 struct nfs4_slot_table *tbl;
349
350 if (!nfs4_has_session(clp)) {
351 dprintk("%s: No session\n", __func__);
352 return;
353 }
354 tbl = &clp->cl_session->fc_slot_table;
355 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
356 dprintk("%s: No slot\n", __func__);
357 /* just wake up the next guy waiting since
358 * we may have not consumed a slot after all */
359 rpc_wake_up_next(&tbl->slot_tbl_waitq);
360 return;
361 }
362 nfs4_free_slot(tbl, res->sr_slotid);
363 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
364}
365
b0df806c
AA		 366static void nfs41_sequence_done(struct nfs_client *clp,
367 struct nfs4_sequence_res *res,
368 int rpc_status)
369{
370 unsigned long timestamp;
371 struct nfs4_slot_table *tbl;
372 struct nfs4_slot *slot;
373
374 /*
375 * sr_status remains 1 if an RPC level error occurred. The server
376 * may or may not have processed the sequence operation..
377 * Proceed as if the server received and processed the sequence
378 * operation.
379 */
380 if (res->sr_status == 1)
381 res->sr_status = NFS_OK;
382
383 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
384 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
385 goto out;
386
387 tbl = &clp->cl_session->fc_slot_table;
388 slot = tbl->slots + res->sr_slotid;
389
390 if (res->sr_status == 0) {
391 /* Update the slot's sequence and clientid lease timer */
392 ++slot->seq_nr;
393 timestamp = res->sr_renewal_time;
394 spin_lock(&clp->cl_lock);
395 if (time_before(clp->cl_last_renewal, timestamp))
396 clp->cl_last_renewal = timestamp;
397 spin_unlock(&clp->cl_lock);
398 return;
399 }
400out:
401 /* The session may be reset by one of the error handlers. */
402 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
403 nfs41_sequence_free_slot(clp, res);
404}
405
510b8175
BH		 406/*
407 * nfs4_find_slot - efficiently look for a free slot
408 *
409 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
410 * If found, we mark the slot as used, update the highest_used_slotid,
411 * and respectively set up the sequence operation args.
412 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 413 *
414 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 415 */
416static u8
417nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
418{
419 int slotid;
420 u8 ret_id = NFS4_MAX_SLOT_TABLE;
421 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
422
510b8175
BH		 423 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
424 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
425 tbl->max_slots);
426 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
427 if (slotid >= tbl->max_slots)
428 goto out;
429 __set_bit(slotid, tbl->used_slots);
430 if (slotid > tbl->highest_used_slotid)
431 tbl->highest_used_slotid = slotid;
432 ret_id = slotid;
433out:
434 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
435 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 436 return ret_id;
437}
438
ce5039c1
AA		 439static int nfs41_setup_sequence(struct nfs4_session *session,
440 struct nfs4_sequence_args *args,
441 struct nfs4_sequence_res *res,
442 int cache_reply,
443 struct rpc_task *task)
444{
fbcd4abc
AA		 445 struct nfs4_slot *slot;
446 struct nfs4_slot_table *tbl;
447 u8 slotid;
448
449 dprintk("--> %s\n", __func__);
ce5039c1
AA		 450 /* slot already allocated? */
451 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
452 return 0;
453
454 memset(res, 0, sizeof(*res));
455 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 456 tbl = &session->fc_slot_table;
457
458 spin_lock(&tbl->slot_tbl_lock);
6df08189 459 if (test_bit(NFS4CLNT_SESSION_RESET, &session->clp->cl_state)) {
b069d94a
AA		 460 if (tbl->highest_used_slotid != -1) {
461 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
462 spin_unlock(&tbl->slot_tbl_lock);
463 dprintk("<-- %s: Session reset: draining\n", __func__);
464 return -EAGAIN;
465 }
466
467 /* The slot table is empty; start the reset thread */
468 dprintk("%s Session Reset\n", __func__);
05f0d236
AA		 469 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
470 nfs4_schedule_state_manager(session->clp);
b069d94a 471 spin_unlock(&tbl->slot_tbl_lock);
05f0d236 472 return -EAGAIN;
b069d94a
AA		 473 }
474
fbcd4abc
AA		 475 slotid = nfs4_find_slot(tbl, task);
476 if (slotid == NFS4_MAX_SLOT_TABLE) {
477 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
478 spin_unlock(&tbl->slot_tbl_lock);
479 dprintk("<-- %s: no free slots\n", __func__);
480 return -EAGAIN;
481 }
482 spin_unlock(&tbl->slot_tbl_lock);
483
484 slot = tbl->slots + slotid;
99fe60d0 485 args->sa_session = session;
fbcd4abc
AA		 486 args->sa_slotid = slotid;
487 args->sa_cache_this = cache_reply;
488
489 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
490
99fe60d0 491 res->sr_session = session;
fbcd4abc
AA		 492 res->sr_slotid = slotid;
493 res->sr_renewal_time = jiffies;
494 /*
495 * sr_status is only set in decode_sequence, and so will remain
496 * set to 1 if an rpc level failure occurs.
497 */
498 res->sr_status = 1;
ce5039c1
AA		 499 return 0;
500}
501
502int nfs4_setup_sequence(struct nfs_client *clp,
503 struct nfs4_sequence_args *args,
504 struct nfs4_sequence_res *res,
505 int cache_reply,
506 struct rpc_task *task)
507{
508 int ret = 0;
509
510 dprintk("--> %s clp %p session %p sr_slotid %d\n",
511 __func__, clp, clp->cl_session, res->sr_slotid);
512
513 if (!nfs4_has_session(clp))
514 goto out;
515 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
516 task);
2628eddf 517 if (ret && ret != -EAGAIN) {
ce5039c1
AA		 518 /* terminate rpc task */
519 task->tk_status = ret;
520 task->tk_action = NULL;
521 }
522out:
523 dprintk("<-- %s status=%d\n", __func__, ret);
524 return ret;
525}
526
527struct nfs41_call_sync_data {
528 struct nfs_client *clp;
529 struct nfs4_sequence_args *seq_args;
530 struct nfs4_sequence_res *seq_res;
531 int cache_reply;
532};
533
534static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
535{
536 struct nfs41_call_sync_data *data = calldata;
537
538 dprintk("--> %s data->clp->cl_session %p\n", __func__,
539 data->clp->cl_session);
540 if (nfs4_setup_sequence(data->clp, data->seq_args,
541 data->seq_res, data->cache_reply, task))
542 return;
543 rpc_call_start(task);
544}
545
69ab40c4
AA		 546static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
547{
548 struct nfs41_call_sync_data *data = calldata;
549
550 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
551 nfs41_sequence_free_slot(data->clp, data->seq_res);
552}
553
ce5039c1
AA		 554struct rpc_call_ops nfs41_call_sync_ops = {
555 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 556 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 557};
558
559static int nfs4_call_sync_sequence(struct nfs_client *clp,
560 struct rpc_clnt *clnt,
561 struct rpc_message *msg,
562 struct nfs4_sequence_args *args,
563 struct nfs4_sequence_res *res,
564 int cache_reply)
565{
566 int ret;
567 struct rpc_task *task;
568 struct nfs41_call_sync_data data = {
569 .clp = clp,
570 .seq_args = args,
571 .seq_res = res,
572 .cache_reply = cache_reply,
573 };
574 struct rpc_task_setup task_setup = {
575 .rpc_client = clnt,
576 .rpc_message = msg,
577 .callback_ops = &nfs41_call_sync_ops,
578 .callback_data = &data
579 };
580
581 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
582 task = rpc_run_task(&task_setup);
583 if (IS_ERR(task))
584 ret = PTR_ERR(task);
585 else {
586 ret = task->tk_status;
587 rpc_put_task(task);
588 }
589 return ret;
590}
591
cccef3b9
AA		 592int _nfs4_call_sync_session(struct nfs_server *server,
593 struct rpc_message *msg,
594 struct nfs4_sequence_args *args,
595 struct nfs4_sequence_res *res,
596 int cache_reply)
597{
ce5039c1
AA		 598 return nfs4_call_sync_sequence(server->nfs_client, server->client,
599 msg, args, res, cache_reply);
cccef3b9
AA		 600}
601
602#endif /* CONFIG_NFS_V4_1 */
603
604int _nfs4_call_sync(struct nfs_server *server,
605 struct rpc_message *msg,
606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
608 int cache_reply)
609{
f3752975 610 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 611 return rpc_call_sync(server->client, msg, 0);
612}
613
614#define nfs4_call_sync(server, msg, args, res, cache_reply) \
615 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
616 &(res)->seq_res, (cache_reply))
617
b0df806c
AA		 618static void nfs4_sequence_done(const struct nfs_server *server,
619 struct nfs4_sequence_res *res, int rpc_status)
620{
621#ifdef CONFIG_NFS_V4_1
622 if (nfs4_has_session(server->nfs_client))
623 nfs41_sequence_done(server->nfs_client, res, rpc_status);
624#endif /* CONFIG_NFS_V4_1 */
625}
626
e608e79f
AA		 627void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp,
628 struct nfs4_sequence_res *res)
629{
630#ifdef CONFIG_NFS_V4_1
631 if (nfs4_has_session(clp)) {
632 nfs41_sequence_free_slot(clp, res);
633 rpc_restart_call_prepare(task);
634 return;
635 }
636#endif /* CONFIG_NFS_V4_1 */
637 rpc_restart_call(task);
638}
639
b0df806c
AA		 640/* no restart, therefore free slot here */
641static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
642 struct nfs4_sequence_res *res,
643 int rpc_status)
644{
645 nfs4_sequence_done(server, res, rpc_status);
646 nfs4_sequence_free_slot(server->nfs_client, res);
647}
648
38478b24 649static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 650{
38478b24 651 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 652
38478b24 653 spin_lock(&dir->i_lock);
40d24704
TM		 654 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
655 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 656 nfs_force_lookup_revalidate(dir);
40d24704 657 nfsi->change_attr = cinfo->after;
38478b24 658 spin_unlock(&dir->i_lock);
1da177e4
LT		 659}
660
e56e0b78 661struct nfs4_opendata {
c6d00e63 662 struct kref kref;
e56e0b78
TM		 663 struct nfs_openargs o_arg;
664 struct nfs_openres o_res;
cdd4e68b
TM		 665 struct nfs_open_confirmargs c_arg;
666 struct nfs_open_confirmres c_res;
e56e0b78
TM		 667 struct nfs_fattr f_attr;
668 struct nfs_fattr dir_attr;
ad389da7 669 struct path path;
e56e0b78
TM		 670 struct dentry *dir;
671 struct nfs4_state_owner *owner;
aac00a8d 672 struct nfs4_state *state;
e56e0b78 673 struct iattr attrs;
26e976a8 674 unsigned long timestamp;
3e309914 675 unsigned int rpc_done : 1;
24ac23ab
TM		 676 int rpc_status;
677 int cancelled;
e56e0b78
TM		 678};
679
2ced46c2
TM		 680
681static void nfs4_init_opendata_res(struct nfs4_opendata *p)
682{
683 p->o_res.f_attr = &p->f_attr;
684 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 685 p->o_res.seqid = p->o_arg.seqid;
686 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 687 p->o_res.server = p->o_arg.server;
688 nfs_fattr_init(&p->f_attr);
689 nfs_fattr_init(&p->dir_attr);
578e4585 690 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 691}
692
ad389da7 693static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 694 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 695 const struct iattr *attrs)
696{
ad389da7 697 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 698 struct inode *dir = parent->d_inode;
699 struct nfs_server *server = NFS_SERVER(dir);
700 struct nfs4_opendata *p;
701
702 p = kzalloc(sizeof(*p), GFP_KERNEL);
703 if (p == NULL)
704 goto err;
705 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
706 if (p->o_arg.seqid == NULL)
707 goto err_free;
ad389da7
TM		 708 p->path.mnt = mntget(path->mnt);
709 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 710 p->dir = parent;
711 p->owner = sp;
712 atomic_inc(&sp->so_count);
713 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 714 p->o_arg.open_flags = flags;
715 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 716 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 717 p->o_arg.id = sp->so_owner_id.id;
ad389da7 718 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 719 p->o_arg.server = server;
720 p->o_arg.bitmask = server->attr_bitmask;
721 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 722 if (flags & O_EXCL) {
723 u32 *s = (u32 *) p->o_arg.u.verifier.data;
724 s[0] = jiffies;
725 s[1] = current->pid;
726 } else if (flags & O_CREAT) {
727 p->o_arg.u.attrs = &p->attrs;
728 memcpy(&p->attrs, attrs, sizeof(p->attrs));
729 }
cdd4e68b
TM		 730 p->c_arg.fh = &p->o_res.fh;
731 p->c_arg.stateid = &p->o_res.stateid;
732 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 733 nfs4_init_opendata_res(p);
c6d00e63 734 kref_init(&p->kref);
e56e0b78
TM		 735 return p;
736err_free:
737 kfree(p);
738err:
739 dput(parent);
740 return NULL;
741}
742
c6d00e63 743static void nfs4_opendata_free(struct kref *kref)
e56e0b78 744{
c6d00e63
TM		 745 struct nfs4_opendata *p = container_of(kref,
746 struct nfs4_opendata, kref);
747
748 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 749 if (p->state != NULL)
750 nfs4_put_open_state(p->state);
c6d00e63
TM		 751 nfs4_put_state_owner(p->owner);
752 dput(p->dir);
31f31db1 753 path_put(&p->path);
c6d00e63
TM		 754 kfree(p);
755}
756
757static void nfs4_opendata_put(struct nfs4_opendata *p)
758{
759 if (p != NULL)
760 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 761}
762
06f814a3
TM		 763static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
764{
06f814a3
TM		 765 int ret;
766
06f814a3 767 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 768 return ret;
769}
770
dc0b027d 771static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 772{
773 int ret = 0;
dc0b027d
TM		 774
775 if (open_mode & O_EXCL)
776 goto out;
777 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 778 case FMODE_READ:
779 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 780 break;
781 case FMODE_WRITE:
782 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 783 break;
784 case FMODE_READ|FMODE_WRITE:
785 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
786 }
dc0b027d 787out:
6ee41268
TM		 788 return ret;
789}
790
dc0b027d 791static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 792{
dc0b027d 793 if ((delegation->type & fmode) != fmode)
aac00a8d 794 return 0;
15c831bf 795 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 796 return 0;
b7391f44 797 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 798 return 1;
799}
800
dc0b027d 801static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 802{
dc0b027d 803 switch (fmode) {
e7616923
TM		 804 case FMODE_WRITE:
805 state->n_wronly++;
806 break;
807 case FMODE_READ:
808 state->n_rdonly++;
809 break;
810 case FMODE_READ|FMODE_WRITE:
811 state->n_rdwr++;
812 }
dc0b027d 813 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 814}
815
dc0b027d 816static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 817{
818 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
819 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
820 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 821 switch (fmode) {
003707c7
TM		 822 case FMODE_READ:
823 set_bit(NFS_O_RDONLY_STATE, &state->flags);
824 break;
825 case FMODE_WRITE:
826 set_bit(NFS_O_WRONLY_STATE, &state->flags);
827 break;
828 case FMODE_READ|FMODE_WRITE:
829 set_bit(NFS_O_RDWR_STATE, &state->flags);
830 }
e7616923
TM		 831}
832
dc0b027d 833static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 834{
8bda4e4c 835 write_seqlock(&state->seqlock);
dc0b027d 836 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 837 write_sequnlock(&state->seqlock);
003707c7
TM		 838}
839
dc0b027d 840static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 841{
8bda4e4c
TM		 842 /*
843 * Protect the call to nfs4_state_set_mode_locked and
844 * serialise the stateid update
845 */
846 write_seqlock(&state->seqlock);
003707c7
TM		 847 if (deleg_stateid != NULL) {
848 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
849 set_bit(NFS_DELEGATED_STATE, &state->flags);
850 }
851 if (open_stateid != NULL)
dc0b027d 852 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 853 write_sequnlock(&state->seqlock);
854 spin_lock(&state->owner->so_lock);
dc0b027d 855 update_open_stateflags(state, fmode);
ec073428 856 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 857}
858
dc0b027d 859static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 860{
861 struct nfs_inode *nfsi = NFS_I(state->inode);
862 struct nfs_delegation *deleg_cur;
863 int ret = 0;
864
dc0b027d 865 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 866
867 rcu_read_lock();
868 deleg_cur = rcu_dereference(nfsi->delegation);
869 if (deleg_cur == NULL)
870 goto no_delegation;
871
872 spin_lock(&deleg_cur->lock);
873 if (nfsi->delegation != deleg_cur ||
dc0b027d 874 (deleg_cur->type & fmode) != fmode)
34310430
TM		 875 goto no_delegation_unlock;
876
877 if (delegation == NULL)
878 delegation = &deleg_cur->stateid;
879 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
880 goto no_delegation_unlock;
881
b7391f44 882 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 883 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 884 ret = 1;
885no_delegation_unlock:
886 spin_unlock(&deleg_cur->lock);
887no_delegation:
888 rcu_read_unlock();
889
890 if (!ret && open_stateid != NULL) {
dc0b027d 891 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 892 ret = 1;
893 }
894
895 return ret;
896}
897
898
dc0b027d 899static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 900{
901 struct nfs_delegation *delegation;
902
903 rcu_read_lock();
904 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 905 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 906 rcu_read_unlock();
907 return;
908 }
909 rcu_read_unlock();
910 nfs_inode_return_delegation(inode);
911}
912
6ee41268 913static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 914{
915 struct nfs4_state *state = opendata->state;
916 struct nfs_inode *nfsi = NFS_I(state->inode);
917 struct nfs_delegation *delegation;
dc0b027d
TM		 918 int open_mode = opendata->o_arg.open_flags & O_EXCL;
919 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 920 nfs4_stateid stateid;
921 int ret = -EAGAIN;
922
aac00a8d 923 for (;;) {
dc0b027d 924 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 925 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 926 if (can_open_cached(state, fmode, open_mode)) {
927 update_open_stateflags(state, fmode);
6ee41268 928 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 929 goto out_return_state;
930 }
931 spin_unlock(&state->owner->so_lock);
932 }
34310430
TM		 933 rcu_read_lock();
934 delegation = rcu_dereference(nfsi->delegation);
935 if (delegation == NULL ||
dc0b027d 936 !can_open_delegated(delegation, fmode)) {
34310430 937 rcu_read_unlock();
aac00a8d 938 break;
34310430 939 }
aac00a8d
TM		 940 /* Save the delegation */
941 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
942 rcu_read_unlock();
af22f94a 943 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 944 if (ret != 0)
945 goto out;
946 ret = -EAGAIN;
34310430
TM		 947
948 /* Try to update the stateid using the delegation */
dc0b027d 949 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 950 goto out_return_state;
aac00a8d 951 }
aac00a8d
TM		 952out:
953 return ERR_PTR(ret);
954out_return_state:
955 atomic_inc(&state->count);
956 return state;
957}
958
24ac23ab
TM		 959static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
960{
961 struct inode *inode;
962 struct nfs4_state *state = NULL;
003707c7 963 struct nfs_delegation *delegation;
1b370bc2 964 int ret;
24ac23ab 965
aac00a8d 966 if (!data->rpc_done) {
6ee41268 967 state = nfs4_try_open_cached(data);
aac00a8d
TM		 968 goto out;
969 }
970
1b370bc2 971 ret = -EAGAIN;
24ac23ab 972 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 973 goto err;
24ac23ab 974 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 975 ret = PTR_ERR(inode);
03f28e3a 976 if (IS_ERR(inode))
1b370bc2
TM		 977 goto err;
978 ret = -ENOMEM;
24ac23ab
TM		 979 state = nfs4_get_open_state(inode, data->owner);
980 if (state == NULL)
1b370bc2 981 goto err_put_inode;
549d6ed5 982 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 983 int delegation_flags = 0;
984
003707c7
TM		 985 rcu_read_lock();
986 delegation = rcu_dereference(NFS_I(inode)->delegation);
987 if (delegation)
988 delegation_flags = delegation->flags;
989 rcu_read_unlock();
15c831bf 990 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 991 nfs_inode_set_delegation(state->inode,
992 data->owner->so_cred,
993 &data->o_res);
994 else
995 nfs_inode_reclaim_delegation(state->inode,
996 data->owner->so_cred,
997 &data->o_res);
998 }
34310430
TM		 999
1000 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1001 data->o_arg.fmode);
24ac23ab 1002 iput(inode);
aac00a8d 1003out:
24ac23ab 1004 return state;
1b370bc2
TM		 1005err_put_inode:
1006 iput(inode);
1007err:
1008 return ERR_PTR(ret);
24ac23ab
TM		 1009}
1010
864472e9
TM		 1011static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1012{
1013 struct nfs_inode *nfsi = NFS_I(state->inode);
1014 struct nfs_open_context *ctx;
1015
1016 spin_lock(&state->inode->i_lock);
1017 list_for_each_entry(ctx, &nfsi->open_files, list) {
1018 if (ctx->state != state)
1019 continue;
1020 get_nfs_open_context(ctx);
1021 spin_unlock(&state->inode->i_lock);
1022 return ctx;
1023 }
1024 spin_unlock(&state->inode->i_lock);
1025 return ERR_PTR(-ENOENT);
1026}
1027
6f220ed5
TM		 1028static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1029{
1030 struct nfs4_opendata *opendata;
1031
dc0b027d 1032 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1033 if (opendata == NULL)
1034 return ERR_PTR(-ENOMEM);
1035 opendata->state = state;
1036 atomic_inc(&state->count);
1037 return opendata;
1038}
1039
dc0b027d 1040static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1041{
2ced46c2 1042 struct nfs4_state *newstate;
864472e9
TM		 1043 int ret;
1044
dc0b027d
TM		 1045 opendata->o_arg.open_flags = 0;
1046 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1047 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1048 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1049 nfs4_init_opendata_res(opendata);
864472e9
TM		 1050 ret = _nfs4_proc_open(opendata);
1051 if (ret != 0)
1052 return ret;
2ced46c2 1053 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1054 if (IS_ERR(newstate))
1055 return PTR_ERR(newstate);
dc0b027d 1056 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1057 *res = newstate;
864472e9
TM		 1058 return 0;
1059}
1060
1061static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1062{
864472e9 1063 struct nfs4_state *newstate;
864472e9
TM		 1064 int ret;
1065
1066 /* memory barrier prior to reading state->n_* */
2ced46c2 1067 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1068 smp_rmb();
1069 if (state->n_rdwr != 0) {
2ced46c2 1070 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1071 if (ret != 0)
1072 return ret;
2ced46c2
TM		 1073 if (newstate != state)
1074 return -ESTALE;
864472e9
TM		 1075 }
1076 if (state->n_wronly != 0) {
2ced46c2 1077 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1078 if (ret != 0)
1079 return ret;
2ced46c2
TM		 1080 if (newstate != state)
1081 return -ESTALE;
864472e9
TM		 1082 }
1083 if (state->n_rdonly != 0) {
2ced46c2 1084 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1085 if (ret != 0)
1086 return ret;
2ced46c2
TM		 1087 if (newstate != state)
1088 return -ESTALE;
864472e9 1089 }
1ac7e2fd
TM		 1090 /*
1091 * We may have performed cached opens for all three recoveries.
1092 * Check if we need to update the current stateid.
1093 */
1094 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1095 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1096 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1097 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1098 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1099 write_sequnlock(&state->seqlock);
1ac7e2fd 1100 }
864472e9
TM		 1101 return 0;
1102}
1103
1da177e4
LT		 1104/*
1105 * OPEN_RECLAIM:
1106 * reclaim state on the server after a reboot.
1da177e4 1107 */
539cd03a 1108static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1109{
1ac7e2fd 1110 struct nfs_delegation *delegation;
864472e9 1111 struct nfs4_opendata *opendata;
dc0b027d 1112 fmode_t delegation_type = 0;
1da177e4
LT		 1113 int status;
1114
6f220ed5
TM		 1115 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1116 if (IS_ERR(opendata))
1117 return PTR_ERR(opendata);
864472e9
TM		 1118 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1119 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1120 rcu_read_lock();
1121 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1122 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1123 delegation_type = delegation->type;
1ac7e2fd 1124 rcu_read_unlock();
864472e9
TM		 1125 opendata->o_arg.u.delegation_type = delegation_type;
1126 status = nfs4_open_recover(opendata, state);
c6d00e63 1127 nfs4_opendata_put(opendata);
1da177e4
LT		 1128 return status;
1129}
1130
539cd03a 1131static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1132{
1133 struct nfs_server *server = NFS_SERVER(state->inode);
1134 struct nfs4_exception exception = { };
1135 int err;
1136 do {
539cd03a 1137 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1138 if (err != -NFS4ERR_DELAY)
1139 break;
1140 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1141 } while (exception.retry);
1142 return err;
1143}
1144
864472e9
TM		 1145static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1146{
1147 struct nfs_open_context *ctx;
1148 int ret;
1149
1150 ctx = nfs4_state_find_open_context(state);
1151 if (IS_ERR(ctx))
1152 return PTR_ERR(ctx);
539cd03a 1153 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1154 put_nfs_open_context(ctx);
1155 return ret;
1156}
1157
13437e12 1158static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1159{
e56e0b78 1160 struct nfs4_opendata *opendata;
864472e9 1161 int ret;
1da177e4 1162
6f220ed5
TM		 1163 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1164 if (IS_ERR(opendata))
1165 return PTR_ERR(opendata);
e56e0b78 1166 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1167 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1168 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1169 ret = nfs4_open_recover(opendata, state);
c6d00e63 1170 nfs4_opendata_put(opendata);
864472e9 1171 return ret;
1da177e4
LT		 1172}
1173
13437e12 1174int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1175{
1176 struct nfs4_exception exception = { };
539cd03a 1177 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1178 int err;
1179 do {
13437e12 1180 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1181 switch (err) {
1182 case 0:
965b5d67
TM		 1183 case -ENOENT:
1184 case -ESTALE:
1185 goto out;
1da177e4
LT		 1186 case -NFS4ERR_STALE_CLIENTID:
1187 case -NFS4ERR_STALE_STATEID:
1188 case -NFS4ERR_EXPIRED:
1189 /* Don't recall a delegation if it was lost */
7539bbab 1190 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1191 goto out;
1192 case -ERESTARTSYS:
1193 /*
1194 * The show must go on: exit, but mark the
1195 * stateid as needing recovery.
1196 */
1197 case -NFS4ERR_ADMIN_REVOKED:
1198 case -NFS4ERR_BAD_STATEID:
1199 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1200 case -ENOMEM:
1201 err = 0;
1202 goto out;
1da177e4
LT		 1203 }
1204 err = nfs4_handle_exception(server, err, &exception);
1205 } while (exception.retry);
965b5d67 1206out:
1da177e4
LT		 1207 return err;
1208}
1209
cdd4e68b
TM		 1210static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1211{
1212 struct nfs4_opendata *data = calldata;
1213
1214 data->rpc_status = task->tk_status;
1215 if (RPC_ASSASSINATED(task))
1216 return;
26e976a8 1217 if (data->rpc_status == 0) {
cdd4e68b
TM		 1218 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1219 sizeof(data->o_res.stateid.data));
bb22629e 1220 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1221 renew_lease(data->o_res.server, data->timestamp);
3e309914 1222 data->rpc_done = 1;
26e976a8 1223 }
cdd4e68b
TM		 1224}
1225
1226static void nfs4_open_confirm_release(void *calldata)
1227{
1228 struct nfs4_opendata *data = calldata;
1229 struct nfs4_state *state = NULL;
1230
1231 /* If this request hasn't been cancelled, do nothing */
1232 if (data->cancelled == 0)
1233 goto out_free;
1234 /* In case of error, no cleanup! */
3e309914 1235 if (!data->rpc_done)
cdd4e68b 1236 goto out_free;
cdd4e68b 1237 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1238 if (!IS_ERR(state))
dc0b027d 1239 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1240out_free:
c6d00e63 1241 nfs4_opendata_put(data);
cdd4e68b
TM		 1242}
1243
1244static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1245 .rpc_call_done = nfs4_open_confirm_done,
1246 .rpc_release = nfs4_open_confirm_release,
1247};
1248
1249/*
1250 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1251 */
1252static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1253{
1254 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1255 struct rpc_task *task;
5138fde0
TM		 1256 struct rpc_message msg = {
1257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1258 .rpc_argp = &data->c_arg,
1259 .rpc_resp = &data->c_res,
1260 .rpc_cred = data->owner->so_cred,
1261 };
c970aa85
TM		 1262 struct rpc_task_setup task_setup_data = {
1263 .rpc_client = server->client,
5138fde0 1264 .rpc_message = &msg,
c970aa85
TM		 1265 .callback_ops = &nfs4_open_confirm_ops,
1266 .callback_data = data,
101070ca 1267 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1268 .flags = RPC_TASK_ASYNC,
1269 };
1da177e4
LT		 1270 int status;
1271
c6d00e63 1272 kref_get(&data->kref);
3e309914
TM		 1273 data->rpc_done = 0;
1274 data->rpc_status = 0;
5138fde0 1275 data->timestamp = jiffies;
c970aa85 1276 task = rpc_run_task(&task_setup_data);
7a1218a2 1277 if (IS_ERR(task))
cdd4e68b 1278 return PTR_ERR(task);
cdd4e68b
TM		 1279 status = nfs4_wait_for_completion_rpc_task(task);
1280 if (status != 0) {
1281 data->cancelled = 1;
1282 smp_wmb();
1283 } else
1284 status = data->rpc_status;
e6b3c4db 1285 rpc_put_task(task);
1da177e4
LT		 1286 return status;
1287}
1288
24ac23ab 1289static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1290{
24ac23ab
TM		 1291 struct nfs4_opendata *data = calldata;
1292 struct nfs4_state_owner *sp = data->owner;
5138fde0 1293
24ac23ab
TM		 1294 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1295 return;
aac00a8d
TM		 1296 /*
1297 * Check if we still need to send an OPEN call, or if we can use
1298 * a delegation instead.
1299 */
1300 if (data->state != NULL) {
1301 struct nfs_delegation *delegation;
1302
dc0b027d 1303 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1304 goto out_no_action;
aac00a8d
TM		 1305 rcu_read_lock();
1306 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1307 if (delegation != NULL &&
15c831bf 1308 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1309 rcu_read_unlock();
6ee41268 1310 goto out_no_action;
aac00a8d
TM		 1311 }
1312 rcu_read_unlock();
1313 }
24ac23ab 1314 /* Update sequence id. */
9f958ab8 1315 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1316 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1317 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1318 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1319 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1320 }
26e976a8 1321 data->timestamp = jiffies;
d898528c
AA		 1322 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1323 &data->o_arg.seq_args,
1324 &data->o_res.seq_res, 1, task))
1325 return;
5138fde0 1326 rpc_call_start(task);
6ee41268
TM		 1327 return;
1328out_no_action:
1329 task->tk_action = NULL;
1330
24ac23ab 1331}
1da177e4 1332
24ac23ab
TM		 1333static void nfs4_open_done(struct rpc_task *task, void *calldata)
1334{
1335 struct nfs4_opendata *data = calldata;
1da177e4 1336
24ac23ab 1337 data->rpc_status = task->tk_status;
d898528c
AA		 1338
1339 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1340 task->tk_status);
1341
24ac23ab
TM		 1342 if (RPC_ASSASSINATED(task))
1343 return;
1344 if (task->tk_status == 0) {
1345 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1346 case S_IFREG:
1347 break;
1348 case S_IFLNK:
24ac23ab 1349 data->rpc_status = -ELOOP;
6f926b5b
TM		 1350 break;
1351 case S_IFDIR:
24ac23ab 1352 data->rpc_status = -EISDIR;
6f926b5b
TM		 1353 break;
1354 default:
24ac23ab 1355 data->rpc_status = -ENOTDIR;
6f926b5b 1356 }
26e976a8 1357 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1358 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1359 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1360 }
3e309914 1361 data->rpc_done = 1;
24ac23ab 1362}
6f926b5b 1363
24ac23ab
TM		 1364static void nfs4_open_release(void *calldata)
1365{
1366 struct nfs4_opendata *data = calldata;
1367 struct nfs4_state *state = NULL;
1368
1369 /* If this request hasn't been cancelled, do nothing */
1370 if (data->cancelled == 0)
1371 goto out_free;
1372 /* In case of error, no cleanup! */
3e309914 1373 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1374 goto out_free;
1375 /* In case we need an open_confirm, no cleanup! */
1376 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1377 goto out_free;
24ac23ab 1378 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1379 if (!IS_ERR(state))
dc0b027d 1380 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1381out_free:
c6d00e63 1382 nfs4_opendata_put(data);
24ac23ab
TM		 1383}
1384
1385static const struct rpc_call_ops nfs4_open_ops = {
1386 .rpc_call_prepare = nfs4_open_prepare,
1387 .rpc_call_done = nfs4_open_done,
1388 .rpc_release = nfs4_open_release,
1389};
1390
1391/*
1392 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1393 */
1394static int _nfs4_proc_open(struct nfs4_opendata *data)
1395{
1396 struct inode *dir = data->dir->d_inode;
1397 struct nfs_server *server = NFS_SERVER(dir);
1398 struct nfs_openargs *o_arg = &data->o_arg;
1399 struct nfs_openres *o_res = &data->o_res;
1400 struct rpc_task *task;
5138fde0
TM		 1401 struct rpc_message msg = {
1402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1403 .rpc_argp = o_arg,
1404 .rpc_resp = o_res,
1405 .rpc_cred = data->owner->so_cred,
1406 };
c970aa85
TM		 1407 struct rpc_task_setup task_setup_data = {
1408 .rpc_client = server->client,
5138fde0 1409 .rpc_message = &msg,
c970aa85
TM		 1410 .callback_ops = &nfs4_open_ops,
1411 .callback_data = data,
101070ca 1412 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1413 .flags = RPC_TASK_ASYNC,
1414 };
24ac23ab
TM		 1415 int status;
1416
c6d00e63 1417 kref_get(&data->kref);
3e309914
TM		 1418 data->rpc_done = 0;
1419 data->rpc_status = 0;
2ced46c2 1420 data->cancelled = 0;
c970aa85 1421 task = rpc_run_task(&task_setup_data);
7a1218a2 1422 if (IS_ERR(task))
24ac23ab 1423 return PTR_ERR(task);
24ac23ab
TM		 1424 status = nfs4_wait_for_completion_rpc_task(task);
1425 if (status != 0) {
1426 data->cancelled = 1;
1427 smp_wmb();
1428 } else
1429 status = data->rpc_status;
e6b3c4db 1430 rpc_put_task(task);
3e309914 1431 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1432 return status;
1433
9936781d
TM		 1434 if (o_res->fh.size == 0)
1435 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1436
56ae19f3
TM		 1437 if (o_arg->open_flags & O_CREAT) {
1438 update_changeattr(dir, &o_res->cinfo);
1439 nfs_post_op_update_inode(dir, o_res->dir_attr);
1440 } else
1441 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1442 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1443 status = _nfs4_proc_open_confirm(data);
1da177e4 1444 if (status != 0)
24ac23ab 1445 return status;
1da177e4
LT		 1446 }
1447 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1448 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1449 return 0;
1da177e4
LT		 1450}
1451
10afec90 1452static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1453{
7539bbab 1454 struct nfs_client *clp = server->nfs_client;
a78cb57a 1455 unsigned int loop;
6b30954e 1456 int ret;
58d9714a 1457
a78cb57a 1458 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1459 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1460 if (ret != 0)
a78cb57a 1461 break;
e598d843
TM		 1462 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1463 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1464 break;
58d9714a 1465 nfs4_schedule_state_recovery(clp);
a78cb57a 1466 ret = -EIO;
6b30954e 1467 }
a78cb57a 1468 return ret;
58d9714a
TM		 1469}
1470
1da177e4
LT		 1471/*
1472 * OPEN_EXPIRED:
1473 * reclaim state on the server after a network partition.
1474 * Assumes caller holds the appropriate lock
1475 */
539cd03a 1476static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1477{
e56e0b78 1478 struct nfs4_opendata *opendata;
864472e9 1479 int ret;
1da177e4 1480
6f220ed5
TM		 1481 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1482 if (IS_ERR(opendata))
1483 return PTR_ERR(opendata);
864472e9 1484 ret = nfs4_open_recover(opendata, state);
35d05778 1485 if (ret == -ESTALE)
539cd03a 1486 d_drop(ctx->path.dentry);
c6d00e63 1487 nfs4_opendata_put(opendata);
864472e9 1488 return ret;
1da177e4
LT		 1489}
1490
a9ed2e25 1491static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1492{
539cd03a 1493 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1494 struct nfs4_exception exception = { };
1495 int err;
1496
1497 do {
539cd03a 1498 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1499 switch (err) {
1500 default:
1501 goto out;
1502 case -NFS4ERR_GRACE:
1503 case -NFS4ERR_DELAY:
1504 nfs4_handle_exception(server, err, &exception);
1505 err = 0;
1506 }
202b50dc 1507 } while (exception.retry);
a9ed2e25 1508out:
202b50dc
TM		 1509 return err;
1510}
1511
1da177e4
LT		 1512static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1513{
1da177e4 1514 struct nfs_open_context *ctx;
864472e9 1515 int ret;
1da177e4 1516
864472e9
TM		 1517 ctx = nfs4_state_find_open_context(state);
1518 if (IS_ERR(ctx))
1519 return PTR_ERR(ctx);
539cd03a 1520 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1521 put_nfs_open_context(ctx);
1522 return ret;
1da177e4
LT		 1523}
1524
aa53ed54
JL		 1525/*
1526 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1527 * fields corresponding to attributes that were used to store the verifier.
1528 * Make sure we clobber those fields in the later setattr call
1529 */
1530static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1531{
1532 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1533 !(sattr->ia_valid & ATTR_ATIME_SET))
1534 sattr->ia_valid |= ATTR_ATIME;
1535
1536 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1537 !(sattr->ia_valid & ATTR_MTIME_SET))
1538 sattr->ia_valid |= ATTR_MTIME;
1539}
1540
1da177e4 1541/*
24ac23ab 1542 * Returns a referenced nfs4_state
1da177e4 1543 */
dc0b027d 1544static 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		 1545{
1546 struct nfs4_state_owner *sp;
1547 struct nfs4_state *state = NULL;
1548 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1549 struct nfs4_opendata *opendata;
aac00a8d 1550 int status;
1da177e4
LT		 1551
1552 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1553 status = -ENOMEM;
1554 if (!(sp = nfs4_get_state_owner(server, cred))) {
1555 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1556 goto out_err;
1557 }
58d9714a
TM		 1558 status = nfs4_recover_expired_lease(server);
1559 if (status != 0)
b4454fe1 1560 goto err_put_state_owner;
aac00a8d 1561 if (path->dentry->d_inode != NULL)
dc0b027d 1562 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1563 status = -ENOMEM;
dc0b027d 1564 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1565 if (opendata == NULL)
95d35cb4 1566 goto err_put_state_owner;
1da177e4 1567
aac00a8d
TM		 1568 if (path->dentry->d_inode != NULL)
1569 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1570
24ac23ab 1571 status = _nfs4_proc_open(opendata);
1da177e4 1572 if (status != 0)
c6d00e63 1573 goto err_opendata_put;
1da177e4 1574
aa53ed54
JL		 1575 if (opendata->o_arg.open_flags & O_EXCL)
1576 nfs4_exclusive_attrset(opendata, sattr);
1577
24ac23ab 1578 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1579 status = PTR_ERR(state);
1580 if (IS_ERR(state))
c6d00e63 1581 goto err_opendata_put;
c6d00e63 1582 nfs4_opendata_put(opendata);
1da177e4 1583 nfs4_put_state_owner(sp);
1da177e4
LT		 1584 *res = state;
1585 return 0;
c6d00e63
TM		 1586err_opendata_put:
1587 nfs4_opendata_put(opendata);
e56e0b78
TM		 1588err_put_state_owner:
1589 nfs4_put_state_owner(sp);
1da177e4 1590out_err:
1da177e4
LT		 1591 *res = NULL;
1592 return status;
1593}
1594
1595
dc0b027d 1596static 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		 1597{
1598 struct nfs4_exception exception = { };
1599 struct nfs4_state *res;
1600 int status;
1601
1602 do {
dc0b027d 1603 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1604 if (status == 0)
1605 break;
1606 /* NOTE: BAD_SEQID means the server and client disagree about the
1607 * book-keeping w.r.t. state-changing operations
1608 * (OPEN/CLOSE/LOCK/LOCKU...)
1609 * It is actually a sign of a bug on the client or on the server.
1610 *
1611 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1612 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1613 * have unhashed the old state_owner for us, and that we can
1614 * therefore safely retry using a new one. We should still warn
1615 * the user though...
1616 */
1617 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1618 printk(KERN_WARNING "NFS: v4 server %s "
1619 " returned a bad sequence-id error!\n",
1620 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1621 exception.retry = 1;
1622 continue;
1623 }
550f5747
TM		 1624 /*
1625 * BAD_STATEID on OPEN means that the server cancelled our
1626 * state before it received the OPEN_CONFIRM.
1627 * Recover by retrying the request as per the discussion
1628 * on Page 181 of RFC3530.
1629 */
1630 if (status == -NFS4ERR_BAD_STATEID) {
1631 exception.retry = 1;
1632 continue;
1633 }
aac00a8d
TM		 1634 if (status == -EAGAIN) {
1635 /* We must have found a delegation */
1636 exception.retry = 1;
1637 continue;
1638 }
1da177e4
LT		 1639 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1640 status, &exception));
1641 } while (exception.retry);
1642 return res;
1643}
1644
659bfcd6
TM		 1645static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1646 struct nfs_fattr *fattr, struct iattr *sattr,
1647 struct nfs4_state *state)
1da177e4 1648{
3e4f6290 1649 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1650 struct nfs_setattrargs arg = {
3e4f6290 1651 .fh = NFS_FH(inode),
1da177e4
LT		 1652 .iap = sattr,
1653 .server = server,
1654 .bitmask = server->attr_bitmask,
1655 };
1656 struct nfs_setattrres res = {
1657 .fattr = fattr,
1658 .server = server,
1659 };
1660 struct rpc_message msg = {
659bfcd6
TM		 1661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1662 .rpc_argp = &arg,
1663 .rpc_resp = &res,
1664 .rpc_cred = cred,
1da177e4 1665 };
26e976a8 1666 unsigned long timestamp = jiffies;
65e4308d 1667 int status;
1da177e4 1668
0e574af1 1669 nfs_fattr_init(fattr);
1da177e4 1670
3e4f6290
TM		 1671 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1672 /* Use that stateid */
1673 } else if (state != NULL) {
08e9eac4
TM		 1674 nfs4_copy_stateid(&arg.stateid, state, current->files);
1675 } else
1da177e4
LT		 1676 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1677
cccef3b9 1678 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1679 if (status == 0 && state != NULL)
1680 renew_lease(server, timestamp);
65e4308d 1681 return status;
1da177e4
LT		 1682}
1683
659bfcd6
TM		 1684static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1685 struct nfs_fattr *fattr, struct iattr *sattr,
1686 struct nfs4_state *state)
1da177e4 1687{
3e4f6290 1688 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1689 struct nfs4_exception exception = { };
1690 int err;
1691 do {
1692 err = nfs4_handle_exception(server,
659bfcd6 1693 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1694 &exception);
1695 } while (exception.retry);
1696 return err;
1697}
1698
1699struct nfs4_closedata {
4a35bd41 1700 struct path path;
1da177e4
LT		 1701 struct inode *inode;
1702 struct nfs4_state *state;
1703 struct nfs_closeargs arg;
1704 struct nfs_closeres res;
516a6af6 1705 struct nfs_fattr fattr;
26e976a8 1706 unsigned long timestamp;
1da177e4
LT		 1707};
1708
963d8fe5 1709static void nfs4_free_closedata(void *data)
9512135d 1710{
963d8fe5
TM		 1711 struct nfs4_closedata *calldata = data;
1712 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1713
1714 nfs4_put_open_state(calldata->state);
1715 nfs_free_seqid(calldata->arg.seqid);
9512135d 1716 nfs4_put_state_owner(sp);
31f31db1 1717 path_put(&calldata->path);
9512135d
TM		 1718 kfree(calldata);
1719}
1720
963d8fe5 1721static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1722{
963d8fe5 1723 struct nfs4_closedata *calldata = data;
1da177e4 1724 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1725 struct nfs_server *server = NFS_SERVER(calldata->inode);
1726
19ddab06 1727 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1728 if (RPC_ASSASSINATED(task))
1729 return;
1da177e4
LT		 1730 /* hmm. we are done with the inode, and in the process of freeing
1731 * the state_owner. we keep this around to process errors
1732 */
1da177e4
LT		 1733 switch (task->tk_status) {
1734 case 0:
45328c35 1735 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1736 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1737 break;
1738 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1739 case -NFS4ERR_OLD_STATEID:
1740 case -NFS4ERR_BAD_STATEID:
1da177e4 1741 case -NFS4ERR_EXPIRED:
dc0b027d 1742 if (calldata->arg.fmode == 0)
9e33bed5 1743 break;
1da177e4 1744 default:
9e33bed5 1745 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
e608e79f
AA		 1746 nfs4_restart_rpc(task, server->nfs_client,
1747 &calldata->res.seq_res);
1da177e4
LT		 1748 return;
1749 }
1750 }
19ddab06 1751 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1752 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1753}
1754
4ce70ada 1755static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1756{
4ce70ada 1757 struct nfs4_closedata *calldata = data;
9512135d 1758 struct nfs4_state *state = calldata->state;
003707c7 1759 int clear_rd, clear_wr, clear_rdwr;
9512135d 1760
963d8fe5 1761 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1762 return;
003707c7 1763
003707c7 1764 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1765 spin_lock(&state->owner->so_lock);
003707c7 1766 /* Calculate the change in open mode */
e7616923 1767 if (state->n_rdwr == 0) {
003707c7 1768 if (state->n_rdonly == 0) {
003707c7
TM		 1769 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1770 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1771 }
1772 if (state->n_wronly == 0) {
003707c7
TM		 1773 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1774 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1775 }
e7616923 1776 }
4cecb76f 1777 spin_unlock(&state->owner->so_lock);
003707c7 1778 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1779 /* Note: exit _without_ calling nfs4_close_done */
1780 task->tk_action = NULL;
9512135d
TM		 1781 return;
1782 }
516a6af6 1783 nfs_fattr_init(calldata->res.fattr);
45328c35 1784 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1785 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1786 calldata->arg.fmode = FMODE_READ;
45328c35 1787 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1788 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1789 calldata->arg.fmode = FMODE_WRITE;
45328c35 1790 }
26e976a8 1791 calldata->timestamp = jiffies;
19ddab06
AA		 1792 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1793 &calldata->arg.seq_args, &calldata->res.seq_res,
1794 1, task))
1795 return;
5138fde0 1796 rpc_call_start(task);
1da177e4
LT		 1797}
1798
963d8fe5 1799static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1800 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1801 .rpc_call_done = nfs4_close_done,
1802 .rpc_release = nfs4_free_closedata,
1803};
1804
1da177e4
LT		 1805/*
1806 * It is possible for data to be read/written from a mem-mapped file
1807 * after the sys_close call (which hits the vfs layer as a flush).
1808 * This means that we can't safely call nfsv4 close on a file until
1809 * the inode is cleared. This in turn means that we are not good
1810 * NFSv4 citizens - we do not indicate to the server to update the file's
1811 * share state even when we are done with one of the three share
1812 * stateid's in the inode.
1813 *
1814 * NOTE: Caller must be holding the sp->so_owner semaphore!
1815 */
a49c3c77 1816int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1817{
4a35bd41 1818 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1819 struct nfs4_closedata *calldata;
b39e625b
TM		 1820 struct nfs4_state_owner *sp = state->owner;
1821 struct rpc_task *task;
5138fde0
TM		 1822 struct rpc_message msg = {
1823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1824 .rpc_cred = state->owner->so_cred,
1825 };
c970aa85
TM		 1826 struct rpc_task_setup task_setup_data = {
1827 .rpc_client = server->client,
5138fde0 1828 .rpc_message = &msg,
c970aa85 1829 .callback_ops = &nfs4_close_ops,
101070ca 1830 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1831 .flags = RPC_TASK_ASYNC,
1832 };
9512135d 1833 int status = -ENOMEM;
1da177e4 1834
19ddab06 1835 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1836 if (calldata == NULL)
9512135d 1837 goto out;
4a35bd41 1838 calldata->inode = state->inode;
1da177e4 1839 calldata->state = state;
4a35bd41 1840 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1841 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1842 if (nfs4_has_session(server->nfs_client))
1843 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1844 /* Serialization for the sequence id */
cee54fc9 1845 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1846 if (calldata->arg.seqid == NULL)
1847 goto out_free_calldata;
dc0b027d 1848 calldata->arg.fmode = 0;
a65318bf 1849 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1850 calldata->res.fattr = &calldata->fattr;
c1d51931 1851 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1852 calldata->res.server = server;
5f7dbd5c 1853 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1854 calldata->path.mnt = mntget(path->mnt);
1855 calldata->path.dentry = dget(path->dentry);
9512135d 1856
5138fde0
TM		 1857 msg.rpc_argp = &calldata->arg,
1858 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1859 task_setup_data.callback_data = calldata;
1860 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1861 if (IS_ERR(task))
1862 return PTR_ERR(task);
a49c3c77
TM		 1863 status = 0;
1864 if (wait)
1865 status = rpc_wait_for_completion_task(task);
b39e625b 1866 rpc_put_task(task);
a49c3c77 1867 return status;
9512135d
TM		 1868out_free_calldata:
1869 kfree(calldata);
1870out:
b39e625b
TM		 1871 nfs4_put_open_state(state);
1872 nfs4_put_state_owner(sp);
9512135d 1873 return status;
1da177e4
LT		 1874}
1875
dc0b027d 1876static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1877{
1878 struct file *filp;
1b45c46c 1879 int ret;
02a913a7 1880
1b45c46c 1881 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1882 if (fmode & FMODE_EXEC) {
af22f94a 1883 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1884 state->owner->so_cred,
1885 nd->intent.open.flags);
1886 if (ret < 0)
1887 goto out_close;
1888 }
4a35bd41 1889 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1890 if (!IS_ERR(filp)) {
1891 struct nfs_open_context *ctx;
cd3758e3 1892 ctx = nfs_file_open_context(filp);
02a913a7 1893 ctx->state = state;
95cf959b
TM		 1894 return 0;
1895 }
1b45c46c
TM		 1896 ret = PTR_ERR(filp);
1897out_close:
dc0b027d 1898 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1899 return ret;
02a913a7
TM		 1900}
1901
1902struct dentry *
1da177e4
LT		 1903nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1904{
ad389da7 1905 struct path path = {
4ac91378 1906 .mnt = nd->path.mnt,
ad389da7
TM		 1907 .dentry = dentry,
1908 };
4ac91378 1909 struct dentry *parent;
1da177e4
LT		 1910 struct iattr attr;
1911 struct rpc_cred *cred;
1912 struct nfs4_state *state;
02a913a7 1913 struct dentry *res;
dc0b027d 1914 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1915
1916 if (nd->flags & LOOKUP_CREATE) {
1917 attr.ia_mode = nd->intent.open.create_mode;
1918 attr.ia_valid = ATTR_MODE;
1919 if (!IS_POSIXACL(dir))
ce3b0f8d 1920 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1921 } else {
1922 attr.ia_valid = 0;
1923 BUG_ON(nd->intent.open.flags & O_CREAT);
1924 }
1925
98a8e323 1926 cred = rpc_lookup_cred();
1da177e4 1927 if (IS_ERR(cred))
02a913a7 1928 return (struct dentry *)cred;
565277f6
TM		 1929 parent = dentry->d_parent;
1930 /* Protect against concurrent sillydeletes */
1931 nfs_block_sillyrename(parent);
dc0b027d 1932 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1933 put_rpccred(cred);
02a913a7 1934 if (IS_ERR(state)) {
d75340cc 1935 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1936 d_add(dentry, NULL);
d75340cc
TM		 1937 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1938 }
565277f6 1939 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1940 return (struct dentry *)state;
1941 }
24ac23ab 1942 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1943 if (res != NULL)
deee9369 1944 path.dentry = res;
d75340cc 1945 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1946 nfs_unblock_sillyrename(parent);
dc0b027d 1947 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1948 return res;
1da177e4
LT		 1949}
1950
1951int
02a913a7 1952nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1953{
ad389da7 1954 struct path path = {
4ac91378 1955 .mnt = nd->path.mnt,
ad389da7
TM		 1956 .dentry = dentry,
1957 };
1da177e4
LT		 1958 struct rpc_cred *cred;
1959 struct nfs4_state *state;
dc0b027d 1960 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1961
98a8e323 1962 cred = rpc_lookup_cred();
1da177e4
LT		 1963 if (IS_ERR(cred))
1964 return PTR_ERR(cred);
dc0b027d 1965 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1966 put_rpccred(cred);
02a913a7
TM		 1967 if (IS_ERR(state)) {
1968 switch (PTR_ERR(state)) {
1969 case -EPERM:
1970 case -EACCES:
1971 case -EDQUOT:
1972 case -ENOSPC:
1973 case -EROFS:
1974 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1975 return 1;
b87c0adf
CL		 1976 default:
1977 goto out_drop;
02a913a7 1978 }
02a913a7 1979 }
24ac23ab 1980 if (state->inode == dentry->d_inode) {
d75340cc 1981 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1982 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1983 return 1;
1984 }
dc0b027d 1985 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1986out_drop:
1987 d_drop(dentry);
1da177e4
LT		 1988 return 0;
1989}
1990
1185a552 1991static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 1992{
1993 if (ctx->state == NULL)
1994 return;
1995 if (is_sync)
1996 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1997 else
1998 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1999}
1da177e4
LT		 2000
2001static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2002{
43652ad5
BH		 2003 struct nfs4_server_caps_arg args = {
2004 .fhandle = fhandle,
2005 };
1da177e4
LT		 2006 struct nfs4_server_caps_res res = {};
2007 struct rpc_message msg = {
2008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2009 .rpc_argp = &args,
1da177e4
LT		 2010 .rpc_resp = &res,
2011 };
2012 int status;
2013
cccef3b9 2014 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2015 if (status == 0) {
2016 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2017 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2018 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2019 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2020 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2021 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2022 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2023 server->caps |= NFS_CAP_ACLS;
2024 if (res.has_links != 0)
2025 server->caps |= NFS_CAP_HARDLINKS;
2026 if (res.has_symlinks != 0)
2027 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2028 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2029 server->caps |= NFS_CAP_FILEID;
2030 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2031 server->caps |= NFS_CAP_MODE;
2032 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2033 server->caps |= NFS_CAP_NLINK;
2034 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2035 server->caps |= NFS_CAP_OWNER;
2036 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2037 server->caps |= NFS_CAP_OWNER_GROUP;
2038 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2039 server->caps |= NFS_CAP_ATIME;
2040 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2041 server->caps |= NFS_CAP_CTIME;
2042 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2043 server->caps |= NFS_CAP_MTIME;
2044
a65318bf
TM		 2045 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2046 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2047 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2048 server->acl_bitmask = res.acl_bitmask;
2049 }
cccef3b9 2050
1da177e4
LT		 2051 return status;
2052}
2053
55a97593 2054int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2055{
2056 struct nfs4_exception exception = { };
2057 int err;
2058 do {
2059 err = nfs4_handle_exception(server,
2060 _nfs4_server_capabilities(server, fhandle),
2061 &exception);
2062 } while (exception.retry);
2063 return err;
2064}
2065
2066static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2067 struct nfs_fsinfo *info)
2068{
1da177e4
LT		 2069 struct nfs4_lookup_root_arg args = {
2070 .bitmask = nfs4_fattr_bitmap,
2071 };
2072 struct nfs4_lookup_res res = {
2073 .server = server,
0e574af1 2074 .fattr = info->fattr,
1da177e4
LT		 2075 .fh = fhandle,
2076 };
2077 struct rpc_message msg = {
2078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2079 .rpc_argp = &args,
2080 .rpc_resp = &res,
2081 };
008f55d0 2082
0e574af1 2083 nfs_fattr_init(info->fattr);
fccba804 2084 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2085}
2086
2087static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2088 struct nfs_fsinfo *info)
2089{
2090 struct nfs4_exception exception = { };
2091 int err;
2092 do {
2093 err = nfs4_handle_exception(server,
2094 _nfs4_lookup_root(server, fhandle, info),
2095 &exception);
2096 } while (exception.retry);
2097 return err;
2098}
2099
54ceac45
DH		 2100/*
2101 * get the file handle for the "/" directory on the server
2102 */
1da177e4 2103static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2104 struct nfs_fsinfo *info)
1da177e4 2105{
1da177e4
LT		 2106 int status;
2107
1da177e4 2108 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2109 if (status == 0)
2110 status = nfs4_server_capabilities(server, fhandle);
2111 if (status == 0)
2112 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2113 return nfs4_map_errors(status);
1da177e4
LT		 2114}
2115
6b97fd3d
MN		 2116/*
2117 * Get locations and (maybe) other attributes of a referral.
2118 * Note that we'll actually follow the referral later when
2119 * we detect fsid mismatch in inode revalidation
2120 */
56659e99 2121static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2122{
2123 int status = -ENOMEM;
2124 struct page *page = NULL;
2125 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2126
2127 page = alloc_page(GFP_KERNEL);
2128 if (page == NULL)
2129 goto out;
2130 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2131 if (locations == NULL)
2132 goto out;
2133
c228fd3a 2134 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2135 if (status != 0)
2136 goto out;
2137 /* Make sure server returned a different fsid for the referral */
2138 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2139 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2140 status = -EIO;
2141 goto out;
2142 }
2143
2144 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2145 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2146 if (!fattr->mode)
2147 fattr->mode = S_IFDIR;
2148 memset(fhandle, 0, sizeof(struct nfs_fh));
2149out:
2150 if (page)
2151 __free_page(page);
2152 if (locations)
2153 kfree(locations);
2154 return status;
2155}
2156
1da177e4
LT		 2157static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2158{
2159 struct nfs4_getattr_arg args = {
2160 .fh = fhandle,
2161 .bitmask = server->attr_bitmask,
2162 };
2163 struct nfs4_getattr_res res = {
2164 .fattr = fattr,
2165 .server = server,
2166 };
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2169 .rpc_argp = &args,
2170 .rpc_resp = &res,
2171 };
2172
0e574af1 2173 nfs_fattr_init(fattr);
cccef3b9 2174 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2175}
2176
2177static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2178{
2179 struct nfs4_exception exception = { };
2180 int err;
2181 do {
2182 err = nfs4_handle_exception(server,
2183 _nfs4_proc_getattr(server, fhandle, fattr),
2184 &exception);
2185 } while (exception.retry);
2186 return err;
2187}
2188
2189/*
2190 * The file is not closed if it is opened due to the a request to change
2191 * the size of the file. The open call will not be needed once the
2192 * VFS layer lookup-intents are implemented.
2193 *
2194 * Close is called when the inode is destroyed.
2195 * If we haven't opened the file for O_WRONLY, we
2196 * need to in the size_change case to obtain a stateid.
2197 *
2198 * Got race?
2199 * Because OPEN is always done by name in nfsv4, it is
2200 * possible that we opened a different file by the same
2201 * name. We can recognize this race condition, but we
2202 * can't do anything about it besides returning an error.
2203 *
2204 * This will be fixed with VFS changes (lookup-intent).
2205 */
2206static int
2207nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2208 struct iattr *sattr)
2209{
08e9eac4 2210 struct inode *inode = dentry->d_inode;
659bfcd6 2211 struct rpc_cred *cred = NULL;
d530838b 2212 struct nfs4_state *state = NULL;
1da177e4
LT		 2213 int status;
2214
0e574af1 2215 nfs_fattr_init(fattr);
1da177e4 2216
d530838b 2217 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2218 if (sattr->ia_valid & ATTR_FILE) {
2219 struct nfs_open_context *ctx;
2220
2221 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2222 if (ctx) {
2223 cred = ctx->cred;
2224 state = ctx->state;
2225 }
659bfcd6 2226 }
08e9eac4 2227
659bfcd6 2228 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2229 if (status == 0)
2230 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2231 return status;
2232}
2233
56659e99
TM		 2234static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2235 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2236 struct nfs_fattr *fattr)
2237{
2238 int status;
2239 struct nfs4_lookup_arg args = {
2240 .bitmask = server->attr_bitmask,
2241 .dir_fh = dirfh,
2242 .name = name,
2243 };
2244 struct nfs4_lookup_res res = {
2245 .server = server,
2246 .fattr = fattr,
2247 .fh = fhandle,
2248 };
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2251 .rpc_argp = &args,
2252 .rpc_resp = &res,
2253 };
2254
2255 nfs_fattr_init(fattr);
2256
2257 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2258 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2259 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2260 return status;
2261}
2262
2263static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2264 struct qstr *name, struct nfs_fh *fhandle,
2265 struct nfs_fattr *fattr)
2266{
2267 struct nfs4_exception exception = { };
2268 int err;
2269 do {
4e56e082
TM		 2270 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2271 /* FIXME: !!!! */
2272 if (err == -NFS4ERR_MOVED) {
2273 err = -EREMOTE;
2274 break;
2275 }
2276 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2277 } while (exception.retry);
2278 return err;
2279}
2280
56659e99 2281static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2282 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2283{
4e56e082 2284 int status;
1da177e4
LT		 2285
2286 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2287 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2288 if (status == -NFS4ERR_MOVED)
2289 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2290 dprintk("NFS reply lookup: %d\n", status);
2291 return status;
2292}
2293
2294static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2295{
2296 struct nfs4_exception exception = { };
2297 int err;
2298 do {
2299 err = nfs4_handle_exception(NFS_SERVER(dir),
2300 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2301 &exception);
2302 } while (exception.retry);
2303 return err;
2304}
2305
2306static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2307{
76b32999
TM		 2308 struct nfs_server *server = NFS_SERVER(inode);
2309 struct nfs_fattr fattr;
1da177e4
LT		 2310 struct nfs4_accessargs args = {
2311 .fh = NFS_FH(inode),
76b32999
TM		 2312 .bitmask = server->attr_bitmask,
2313 };
2314 struct nfs4_accessres res = {
2315 .server = server,
2316 .fattr = &fattr,
1da177e4 2317 };
1da177e4
LT		 2318 struct rpc_message msg = {
2319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2320 .rpc_argp = &args,
2321 .rpc_resp = &res,
2322 .rpc_cred = entry->cred,
2323 };
2324 int mode = entry->mask;
2325 int status;
2326
2327 /*
2328 * Determine which access bits we want to ask for...
2329 */
2330 if (mode & MAY_READ)
2331 args.access |= NFS4_ACCESS_READ;
2332 if (S_ISDIR(inode->i_mode)) {
2333 if (mode & MAY_WRITE)
2334 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2335 if (mode & MAY_EXEC)
2336 args.access |= NFS4_ACCESS_LOOKUP;
2337 } else {
2338 if (mode & MAY_WRITE)
2339 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2340 if (mode & MAY_EXEC)
2341 args.access |= NFS4_ACCESS_EXECUTE;
2342 }
76b32999 2343 nfs_fattr_init(&fattr);
cccef3b9 2344 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2345 if (!status) {
2346 entry->mask = 0;
2347 if (res.access & NFS4_ACCESS_READ)
2348 entry->mask |= MAY_READ;
2349 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2350 entry->mask |= MAY_WRITE;
2351 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2352 entry->mask |= MAY_EXEC;
76b32999 2353 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2354 }
2355 return status;
2356}
2357
2358static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2359{
2360 struct nfs4_exception exception = { };
2361 int err;
2362 do {
2363 err = nfs4_handle_exception(NFS_SERVER(inode),
2364 _nfs4_proc_access(inode, entry),
2365 &exception);
2366 } while (exception.retry);
2367 return err;
2368}
2369
2370/*
2371 * TODO: For the time being, we don't try to get any attributes
2372 * along with any of the zero-copy operations READ, READDIR,
2373 * READLINK, WRITE.
2374 *
2375 * In the case of the first three, we want to put the GETATTR
2376 * after the read-type operation -- this is because it is hard
2377 * to predict the length of a GETATTR response in v4, and thus
2378 * align the READ data correctly. This means that the GETATTR
2379 * may end up partially falling into the page cache, and we should
2380 * shift it into the 'tail' of the xdr_buf before processing.
2381 * To do this efficiently, we need to know the total length
2382 * of data received, which doesn't seem to be available outside
2383 * of the RPC layer.
2384 *
2385 * In the case of WRITE, we also want to put the GETATTR after
2386 * the operation -- in this case because we want to make sure
2387 * we get the post-operation mtime and size. This means that
2388 * we can't use xdr_encode_pages() as written: we need a variant
2389 * of it which would leave room in the 'tail' iovec.
2390 *
2391 * Both of these changes to the XDR layer would in fact be quite
2392 * minor, but I decided to leave them for a subsequent patch.
2393 */
2394static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2395 unsigned int pgbase, unsigned int pglen)
2396{
2397 struct nfs4_readlink args = {
2398 .fh = NFS_FH(inode),
2399 .pgbase = pgbase,
2400 .pglen = pglen,
2401 .pages = &page,
2402 };
f50c7000 2403 struct nfs4_readlink_res res;
1da177e4
LT		 2404 struct rpc_message msg = {
2405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2406 .rpc_argp = &args,
f50c7000 2407 .rpc_resp = &res,
1da177e4
LT		 2408 };
2409
cccef3b9 2410 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2411}
2412
2413static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2414 unsigned int pgbase, unsigned int pglen)
2415{
2416 struct nfs4_exception exception = { };
2417 int err;
2418 do {
2419 err = nfs4_handle_exception(NFS_SERVER(inode),
2420 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2421 &exception);
2422 } while (exception.retry);
2423 return err;
2424}
2425
1da177e4
LT		 2426/*
2427 * Got race?
2428 * We will need to arrange for the VFS layer to provide an atomic open.
2429 * Until then, this create/open method is prone to inefficiency and race
2430 * conditions due to the lookup, create, and open VFS calls from sys_open()
2431 * placed on the wire.
2432 *
2433 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2434 * The file will be opened again in the subsequent VFS open call
2435 * (nfs4_proc_file_open).
2436 *
2437 * The open for read will just hang around to be used by any process that
2438 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2439 */
2440
2441static int
2442nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2443 int flags, struct nameidata *nd)
1da177e4 2444{
ad389da7 2445 struct path path = {
4ac91378 2446 .mnt = nd->path.mnt,
ad389da7
TM		 2447 .dentry = dentry,
2448 };
1da177e4
LT		 2449 struct nfs4_state *state;
2450 struct rpc_cred *cred;
dc0b027d 2451 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2452 int status = 0;
2453
98a8e323 2454 cred = rpc_lookup_cred();
1da177e4
LT		 2455 if (IS_ERR(cred)) {
2456 status = PTR_ERR(cred);
2457 goto out;
2458 }
dc0b027d 2459 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2460 d_drop(dentry);
1da177e4
LT		 2461 if (IS_ERR(state)) {
2462 status = PTR_ERR(state);
659bfcd6 2463 goto out_putcred;
1da177e4 2464 }
d4d9cdcb 2465 d_add(dentry, igrab(state->inode));
d75340cc 2466 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2467 if (flags & O_EXCL) {
2468 struct nfs_fattr fattr;
659bfcd6 2469 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2470 if (status == 0)
65e4308d 2471 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2472 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2473 }
ad389da7 2474 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2475 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2476 else
dc0b027d 2477 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2478out_putcred:
2479 put_rpccred(cred);
1da177e4
LT		 2480out:
2481 return status;
2482}
2483
2484static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2485{
16e42959 2486 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2487 struct nfs_removeargs args = {
1da177e4 2488 .fh = NFS_FH(dir),
4fdc17b2
TM		 2489 .name.len = name->len,
2490 .name.name = name->name,
16e42959
TM		 2491 .bitmask = server->attr_bitmask,
2492 };
4fdc17b2 2493 struct nfs_removeres res = {
16e42959 2494 .server = server,
1da177e4 2495 };
1da177e4 2496 struct rpc_message msg = {
4fdc17b2
TM		 2497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2498 .rpc_argp = &args,
2499 .rpc_resp = &res,
1da177e4
LT		 2500 };
2501 int status;
2502
4fdc17b2 2503 nfs_fattr_init(&res.dir_attr);
cccef3b9 2504 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2505 if (status == 0) {
2506 update_changeattr(dir, &res.cinfo);
4fdc17b2 2507 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2508 }
1da177e4
LT		 2509 return status;
2510}
2511
2512static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2513{
2514 struct nfs4_exception exception = { };
2515 int err;
2516 do {
2517 err = nfs4_handle_exception(NFS_SERVER(dir),
2518 _nfs4_proc_remove(dir, name),
2519 &exception);
2520 } while (exception.retry);
2521 return err;
2522}
2523
e4eff1a6 2524static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2525{
e4eff1a6
TM		 2526 struct nfs_server *server = NFS_SERVER(dir);
2527 struct nfs_removeargs *args = msg->rpc_argp;
2528 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2529
a65318bf 2530 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2531 res->server = server;
1da177e4 2532 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2533}
2534
e4eff1a6 2535static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2536{
e4eff1a6
TM		 2537 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2538
472cfbd9 2539 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2540 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2541 return 0;
472cfbd9 2542 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2543 update_changeattr(dir, &res->cinfo);
2544 nfs_post_op_update_inode(dir, &res->dir_attr);
2545 return 1;
1da177e4
LT		 2546}
2547
2548static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2549 struct inode *new_dir, struct qstr *new_name)
2550{
6caf2c82 2551 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2552 struct nfs4_rename_arg arg = {
2553 .old_dir = NFS_FH(old_dir),
2554 .new_dir = NFS_FH(new_dir),
2555 .old_name = old_name,
2556 .new_name = new_name,
6caf2c82
TM		 2557 .bitmask = server->attr_bitmask,
2558 };
2559 struct nfs_fattr old_fattr, new_fattr;
2560 struct nfs4_rename_res res = {
2561 .server = server,
2562 .old_fattr = &old_fattr,
2563 .new_fattr = &new_fattr,
1da177e4 2564 };
1da177e4
LT		 2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2567 .rpc_argp = &arg,
2568 .rpc_resp = &res,
2569 };
2570 int status;
2571
6caf2c82
TM		 2572 nfs_fattr_init(res.old_fattr);
2573 nfs_fattr_init(res.new_fattr);
cccef3b9 2574 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2575
2576 if (!status) {
2577 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2578 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2579 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2580 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2581 }
2582 return status;
2583}
2584
2585static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2586 struct inode *new_dir, struct qstr *new_name)
2587{
2588 struct nfs4_exception exception = { };
2589 int err;
2590 do {
2591 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2592 _nfs4_proc_rename(old_dir, old_name,
2593 new_dir, new_name),
2594 &exception);
2595 } while (exception.retry);
2596 return err;
2597}
2598
2599static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2600{
91ba2eee 2601 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2602 struct nfs4_link_arg arg = {
2603 .fh = NFS_FH(inode),
2604 .dir_fh = NFS_FH(dir),
2605 .name = name,
91ba2eee
TM		 2606 .bitmask = server->attr_bitmask,
2607 };
2608 struct nfs_fattr fattr, dir_attr;
2609 struct nfs4_link_res res = {
2610 .server = server,
2611 .fattr = &fattr,
2612 .dir_attr = &dir_attr,
1da177e4 2613 };
1da177e4
LT		 2614 struct rpc_message msg = {
2615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2616 .rpc_argp = &arg,
91ba2eee 2617 .rpc_resp = &res,
1da177e4
LT		 2618 };
2619 int status;
2620
91ba2eee
TM		 2621 nfs_fattr_init(res.fattr);
2622 nfs_fattr_init(res.dir_attr);
cccef3b9 2623 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2624 if (!status) {
2625 update_changeattr(dir, &res.cinfo);
2626 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2627 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2628 }
1da177e4
LT		 2629
2630 return status;
2631}
2632
2633static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2634{
2635 struct nfs4_exception exception = { };
2636 int err;
2637 do {
2638 err = nfs4_handle_exception(NFS_SERVER(inode),
2639 _nfs4_proc_link(inode, dir, name),
2640 &exception);
2641 } while (exception.retry);
2642 return err;
2643}
2644
57dc9a57
TM		 2645struct nfs4_createdata {
2646 struct rpc_message msg;
2647 struct nfs4_create_arg arg;
2648 struct nfs4_create_res res;
2649 struct nfs_fh fh;
2650 struct nfs_fattr fattr;
2651 struct nfs_fattr dir_fattr;
2652};
2653
2654static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2655 struct qstr *name, struct iattr *sattr, u32 ftype)
2656{
2657 struct nfs4_createdata *data;
2658
2659 data = kzalloc(sizeof(*data), GFP_KERNEL);
2660 if (data != NULL) {
2661 struct nfs_server *server = NFS_SERVER(dir);
2662
2663 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2664 data->msg.rpc_argp = &data->arg;
2665 data->msg.rpc_resp = &data->res;
2666 data->arg.dir_fh = NFS_FH(dir);
2667 data->arg.server = server;
2668 data->arg.name = name;
2669 data->arg.attrs = sattr;
2670 data->arg.ftype = ftype;
2671 data->arg.bitmask = server->attr_bitmask;
2672 data->res.server = server;
2673 data->res.fh = &data->fh;
2674 data->res.fattr = &data->fattr;
2675 data->res.dir_fattr = &data->dir_fattr;
2676 nfs_fattr_init(data->res.fattr);
2677 nfs_fattr_init(data->res.dir_fattr);
2678 }
2679 return data;
2680}
2681
2682static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2683{
cccef3b9
AA		 2684 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2685 &data->arg, &data->res, 1);
57dc9a57
TM		 2686 if (status == 0) {
2687 update_changeattr(dir, &data->res.dir_cinfo);
2688 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2689 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2690 }
2691 return status;
2692}
2693
2694static void nfs4_free_createdata(struct nfs4_createdata *data)
2695{
2696 kfree(data);
2697}
2698
4f390c15 2699static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2700 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2701{
57dc9a57
TM		 2702 struct nfs4_createdata *data;
2703 int status = -ENAMETOOLONG;
1da177e4 2704
94a6d753 2705 if (len > NFS4_MAXPATHLEN)
57dc9a57 2706 goto out;
4f390c15 2707
57dc9a57
TM		 2708 status = -ENOMEM;
2709 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2710 if (data == NULL)
2711 goto out;
2712
2713 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2714 data->arg.u.symlink.pages = &page;
2715 data->arg.u.symlink.len = len;
1da177e4 2716
57dc9a57
TM		 2717 status = nfs4_do_create(dir, dentry, data);
2718
2719 nfs4_free_createdata(data);
2720out:
1da177e4
LT		 2721 return status;
2722}
2723
4f390c15 2724static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2725 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2726{
2727 struct nfs4_exception exception = { };
2728 int err;
2729 do {
2730 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2731 _nfs4_proc_symlink(dir, dentry, page,
2732 len, sattr),
1da177e4
LT		 2733 &exception);
2734 } while (exception.retry);
2735 return err;
2736}
2737
2738static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2739 struct iattr *sattr)
2740{
57dc9a57
TM		 2741 struct nfs4_createdata *data;
2742 int status = -ENOMEM;
1da177e4 2743
57dc9a57
TM		 2744 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2745 if (data == NULL)
2746 goto out;
2747
2748 status = nfs4_do_create(dir, dentry, data);
2749
2750 nfs4_free_createdata(data);
2751out:
1da177e4
LT		 2752 return status;
2753}
2754
2755static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2756 struct iattr *sattr)
2757{
2758 struct nfs4_exception exception = { };
2759 int err;
2760 do {
2761 err = nfs4_handle_exception(NFS_SERVER(dir),
2762 _nfs4_proc_mkdir(dir, dentry, sattr),
2763 &exception);
2764 } while (exception.retry);
2765 return err;
2766}
2767
2768static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2769 u64 cookie, struct page *page, unsigned int count, int plus)
2770{
2771 struct inode *dir = dentry->d_inode;
2772 struct nfs4_readdir_arg args = {
2773 .fh = NFS_FH(dir),
2774 .pages = &page,
2775 .pgbase = 0,
2776 .count = count,
96d25e53 2777 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2778 };
2779 struct nfs4_readdir_res res;
2780 struct rpc_message msg = {
2781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2782 .rpc_argp = &args,
2783 .rpc_resp = &res,
2784 .rpc_cred = cred,
2785 };
2786 int status;
2787
3110ff80 2788 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2789 dentry->d_parent->d_name.name,
2790 dentry->d_name.name,
2791 (unsigned long long)cookie);
1da177e4
LT		 2792 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2793 res.pgbase = args.pgbase;
cccef3b9 2794 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2795 if (status == 0)
2796 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2797
2798 nfs_invalidate_atime(dir);
2799
3110ff80 2800 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2801 return status;
2802}
2803
2804static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2805 u64 cookie, struct page *page, unsigned int count, int plus)
2806{
2807 struct nfs4_exception exception = { };
2808 int err;
2809 do {
2810 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2811 _nfs4_proc_readdir(dentry, cred, cookie,
2812 page, count, plus),
2813 &exception);
2814 } while (exception.retry);
2815 return err;
2816}
2817
2818static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2819 struct iattr *sattr, dev_t rdev)
2820{
57dc9a57
TM		 2821 struct nfs4_createdata *data;
2822 int mode = sattr->ia_mode;
2823 int status = -ENOMEM;
1da177e4
LT		 2824
2825 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2826 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2827
2828 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2829 if (data == NULL)
2830 goto out;
2831
1da177e4 2832 if (S_ISFIFO(mode))
57dc9a57 2833 data->arg.ftype = NF4FIFO;
1da177e4 2834 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2835 data->arg.ftype = NF4BLK;
2836 data->arg.u.device.specdata1 = MAJOR(rdev);
2837 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2838 }
2839 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2840 data->arg.ftype = NF4CHR;
2841 data->arg.u.device.specdata1 = MAJOR(rdev);
2842 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2843 }
1da177e4 2844
57dc9a57
TM		 2845 status = nfs4_do_create(dir, dentry, data);
2846
2847 nfs4_free_createdata(data);
2848out:
1da177e4
LT		 2849 return status;
2850}
2851
2852static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2853 struct iattr *sattr, dev_t rdev)
2854{
2855 struct nfs4_exception exception = { };
2856 int err;
2857 do {
2858 err = nfs4_handle_exception(NFS_SERVER(dir),
2859 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2860 &exception);
2861 } while (exception.retry);
2862 return err;
2863}
2864
2865static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2866 struct nfs_fsstat *fsstat)
2867{
2868 struct nfs4_statfs_arg args = {
2869 .fh = fhandle,
2870 .bitmask = server->attr_bitmask,
2871 };
24ad148a
BH		 2872 struct nfs4_statfs_res res = {
2873 .fsstat = fsstat,
2874 };
1da177e4
LT		 2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2877 .rpc_argp = &args,
24ad148a 2878 .rpc_resp = &res,
1da177e4
LT		 2879 };
2880
0e574af1 2881 nfs_fattr_init(fsstat->fattr);
cccef3b9 2882 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2883}
2884
2885static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2886{
2887 struct nfs4_exception exception = { };
2888 int err;
2889 do {
2890 err = nfs4_handle_exception(server,
2891 _nfs4_proc_statfs(server, fhandle, fsstat),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2898 struct nfs_fsinfo *fsinfo)
2899{
2900 struct nfs4_fsinfo_arg args = {
2901 .fh = fhandle,
2902 .bitmask = server->attr_bitmask,
2903 };
3dda5e43
BH		 2904 struct nfs4_fsinfo_res res = {
2905 .fsinfo = fsinfo,
2906 };
1da177e4
LT		 2907 struct rpc_message msg = {
2908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2909 .rpc_argp = &args,
3dda5e43 2910 .rpc_resp = &res,
1da177e4
LT		 2911 };
2912
cccef3b9 2913 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2914}
2915
2916static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2917{
2918 struct nfs4_exception exception = { };
2919 int err;
2920
2921 do {
2922 err = nfs4_handle_exception(server,
2923 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2924 &exception);
2925 } while (exception.retry);
2926 return err;
2927}
2928
2929static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2930{
0e574af1 2931 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2932 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2933}
2934
2935static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2936 struct nfs_pathconf *pathconf)
2937{
2938 struct nfs4_pathconf_arg args = {
2939 .fh = fhandle,
2940 .bitmask = server->attr_bitmask,
2941 };
d45b2989
BH		 2942 struct nfs4_pathconf_res res = {
2943 .pathconf = pathconf,
2944 };
1da177e4
LT		 2945 struct rpc_message msg = {
2946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2947 .rpc_argp = &args,
d45b2989 2948 .rpc_resp = &res,
1da177e4
LT		 2949 };
2950
2951 /* None of the pathconf attributes are mandatory to implement */
2952 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2953 memset(pathconf, 0, sizeof(*pathconf));
2954 return 0;
2955 }
2956
0e574af1 2957 nfs_fattr_init(pathconf->fattr);
cccef3b9 2958 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2959}
2960
2961static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_pathconf *pathconf)
2963{
2964 struct nfs4_exception exception = { };
2965 int err;
2966
2967 do {
2968 err = nfs4_handle_exception(server,
2969 _nfs4_proc_pathconf(server, fhandle, pathconf),
2970 &exception);
2971 } while (exception.retry);
2972 return err;
2973}
2974
ec06c096 2975static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2976{
ec06c096 2977 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2978
f11c88af
AA		 2979 dprintk("--> %s\n", __func__);
2980
2981 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2982 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2983
9e33bed5 2984 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
e608e79f 2985 nfs4_restart_rpc(task, server->nfs_client, &data->res.seq_res);
ec06c096 2986 return -EAGAIN;
1da177e4 2987 }
8850df99
TM		 2988
2989 nfs_invalidate_atime(data->inode);
1da177e4 2990 if (task->tk_status > 0)
ec06c096 2991 renew_lease(server, data->timestamp);
36bbe342
AA		 2992 else if (task->tk_status < 0)
2993 nfs4_sequence_free_slot(server->nfs_client, &data->res.seq_res);
2994
ec06c096 2995 return 0;
1da177e4
LT		 2996}
2997
bdc7f021 2998static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2999{
1da177e4 3000 data->timestamp = jiffies;
bdc7f021 3001 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3002}
3003
788e7a89 3004static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3005{
1da177e4
LT		 3006 struct inode *inode = data->inode;
3007
def6ed7e
AA		 3008 /* slot is freed in nfs_writeback_done */
3009 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3010 task->tk_status);
3011
9e33bed5 3012 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
e608e79f
AA		 3013 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
3014 &data->res.seq_res);
788e7a89 3015 return -EAGAIN;
1da177e4 3016 }
4f9838c7 3017 if (task->tk_status >= 0) {
1da177e4 3018 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3019 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3020 }
788e7a89 3021 return 0;
1da177e4
LT		 3022}
3023
bdc7f021 3024static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3025{
bdc7f021
TM		 3026 struct nfs_server *server = NFS_SERVER(data->inode);
3027
a65318bf 3028 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3029 data->res.server = server;
1da177e4
LT		 3030 data->timestamp = jiffies;
3031
bdc7f021 3032 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3033}
3034
788e7a89 3035static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3036{
1da177e4
LT		 3037 struct inode *inode = data->inode;
3038
21d9a851
AA		 3039 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3040 task->tk_status);
9e33bed5 3041 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
e608e79f
AA		 3042 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
3043 &data->res.seq_res);
788e7a89 3044 return -EAGAIN;
1da177e4 3045 }
21d9a851
AA		 3046 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3047 &data->res.seq_res);
9e08a3c5 3048 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3049 return 0;
1da177e4
LT		 3050}
3051
bdc7f021 3052static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3053{
788e7a89 3054 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3055
a65318bf 3056 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3057 data->res.server = server;
bdc7f021 3058 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3059}
3060
3061/*
3062 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3063 * standalone procedure for queueing an asynchronous RENEW.
3064 */
963d8fe5 3065static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3066{
adfa6f98 3067 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3068 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3069
3070 if (task->tk_status < 0) {
95baa25c
TM		 3071 /* Unless we're shutting down, schedule state recovery! */
3072 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3073 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3074 return;
3075 }
3076 spin_lock(&clp->cl_lock);
3077 if (time_before(clp->cl_last_renewal,timestamp))
3078 clp->cl_last_renewal = timestamp;
3079 spin_unlock(&clp->cl_lock);
3080}
3081
963d8fe5
TM		 3082static const struct rpc_call_ops nfs4_renew_ops = {
3083 .rpc_call_done = nfs4_renew_done,
3084};
3085
adfa6f98 3086int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3087{
3088 struct rpc_message msg = {
3089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3090 .rpc_argp = clp,
b4454fe1 3091 .rpc_cred = cred,
1da177e4
LT		 3092 };
3093
3094 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3095 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3096}
3097
adfa6f98 3098int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3099{
3100 struct rpc_message msg = {
3101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3102 .rpc_argp = clp,
b4454fe1 3103 .rpc_cred = cred,
1da177e4
LT		 3104 };
3105 unsigned long now = jiffies;
3106 int status;
3107
3108 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3109 if (status < 0)
3110 return status;
3111 spin_lock(&clp->cl_lock);
3112 if (time_before(clp->cl_last_renewal,now))
3113 clp->cl_last_renewal = now;
3114 spin_unlock(&clp->cl_lock);
3115 return 0;
3116}
3117
aa1870af
BF		 3118static inline int nfs4_server_supports_acls(struct nfs_server *server)
3119{
3120 return (server->caps & NFS_CAP_ACLS)
3121 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3122 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3123}
3124
3125/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3126 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3127 * the stack.
3128 */
3129#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3130
3131static void buf_to_pages(const void *buf, size_t buflen,
3132 struct page **pages, unsigned int *pgbase)
3133{
3134 const void *p = buf;
3135
3136 *pgbase = offset_in_page(buf);
3137 p -= *pgbase;
3138 while (p < buf + buflen) {
3139 *(pages++) = virt_to_page(p);
3140 p += PAGE_CACHE_SIZE;
3141 }
3142}
3143
e50a1c2e
BF		 3144struct nfs4_cached_acl {
3145 int cached;
3146 size_t len;
3e9d4154 3147 char data[0];
e50a1c2e
BF		 3148};
3149
3150static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3151{
3152 struct nfs_inode *nfsi = NFS_I(inode);
3153
3154 spin_lock(&inode->i_lock);
3155 kfree(nfsi->nfs4_acl);
3156 nfsi->nfs4_acl = acl;
3157 spin_unlock(&inode->i_lock);
3158}
3159
3160static void nfs4_zap_acl_attr(struct inode *inode)
3161{
3162 nfs4_set_cached_acl(inode, NULL);
3163}
3164
3165static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3166{
3167 struct nfs_inode *nfsi = NFS_I(inode);
3168 struct nfs4_cached_acl *acl;
3169 int ret = -ENOENT;
3170
3171 spin_lock(&inode->i_lock);
3172 acl = nfsi->nfs4_acl;
3173 if (acl == NULL)
3174 goto out;
3175 if (buf == NULL) /* user is just asking for length */
3176 goto out_len;
3177 if (acl->cached == 0)
3178 goto out;
3179 ret = -ERANGE; /* see getxattr(2) man page */
3180 if (acl->len > buflen)
3181 goto out;
3182 memcpy(buf, acl->data, acl->len);
3183out_len:
3184 ret = acl->len;
3185out:
3186 spin_unlock(&inode->i_lock);
3187 return ret;
3188}
3189
3190static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3191{
3192 struct nfs4_cached_acl *acl;
3193
3194 if (buf && acl_len <= PAGE_SIZE) {
3195 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3196 if (acl == NULL)
3197 goto out;
3198 acl->cached = 1;
3199 memcpy(acl->data, buf, acl_len);
3200 } else {
3201 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3202 if (acl == NULL)
3203 goto out;
3204 acl->cached = 0;
3205 }
3206 acl->len = acl_len;
3207out:
3208 nfs4_set_cached_acl(inode, acl);
3209}
3210
16b4289c 3211static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3212{
aa1870af
BF		 3213 struct page *pages[NFS4ACL_MAXPAGES];
3214 struct nfs_getaclargs args = {
3215 .fh = NFS_FH(inode),
3216 .acl_pages = pages,
3217 .acl_len = buflen,
3218 };
663c79b3
BH		 3219 struct nfs_getaclres res = {
3220 .acl_len = buflen,
3221 };
e50a1c2e 3222 void *resp_buf;
aa1870af
BF		 3223 struct rpc_message msg = {
3224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3225 .rpc_argp = &args,
663c79b3 3226 .rpc_resp = &res,
aa1870af 3227 };
e50a1c2e 3228 struct page *localpage = NULL;
aa1870af
BF		 3229 int ret;
3230
e50a1c2e
BF		 3231 if (buflen < PAGE_SIZE) {
3232 /* As long as we're doing a round trip to the server anyway,
3233 * let's be prepared for a page of acl data. */
3234 localpage = alloc_page(GFP_KERNEL);
3235 resp_buf = page_address(localpage);
3236 if (localpage == NULL)
3237 return -ENOMEM;
3238 args.acl_pages[0] = localpage;
3239 args.acl_pgbase = 0;
663c79b3 3240 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3241 } else {
3242 resp_buf = buf;
3243 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3244 }
cccef3b9 3245 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3246 if (ret)
3247 goto out_free;
663c79b3
BH		 3248 if (res.acl_len > args.acl_len)
3249 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3250 else
663c79b3 3251 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3252 if (buf) {
3253 ret = -ERANGE;
663c79b3 3254 if (res.acl_len > buflen)
e50a1c2e
BF		 3255 goto out_free;
3256 if (localpage)
663c79b3 3257 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3258 }
663c79b3 3259 ret = res.acl_len;
e50a1c2e
BF		 3260out_free:
3261 if (localpage)
3262 __free_page(localpage);
aa1870af
BF		 3263 return ret;
3264}
3265
16b4289c
TM		 3266static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3267{
3268 struct nfs4_exception exception = { };
3269 ssize_t ret;
3270 do {
3271 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3272 if (ret >= 0)
3273 break;
3274 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3275 } while (exception.retry);
3276 return ret;
3277}
3278
e50a1c2e
BF		 3279static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3280{
3281 struct nfs_server *server = NFS_SERVER(inode);
3282 int ret;
3283
3284 if (!nfs4_server_supports_acls(server))
3285 return -EOPNOTSUPP;
3286 ret = nfs_revalidate_inode(server, inode);
3287 if (ret < 0)
3288 return ret;
3289 ret = nfs4_read_cached_acl(inode, buf, buflen);
3290 if (ret != -ENOENT)
3291 return ret;
3292 return nfs4_get_acl_uncached(inode, buf, buflen);
3293}
3294
16b4289c 3295static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3296{
3297 struct nfs_server *server = NFS_SERVER(inode);
3298 struct page *pages[NFS4ACL_MAXPAGES];
3299 struct nfs_setaclargs arg = {
3300 .fh = NFS_FH(inode),
3301 .acl_pages = pages,
3302 .acl_len = buflen,
3303 };
73c403a9 3304 struct nfs_setaclres res;
4b580ee3
BF		 3305 struct rpc_message msg = {
3306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3307 .rpc_argp = &arg,
73c403a9 3308 .rpc_resp = &res,
4b580ee3
BF		 3309 };
3310 int ret;
3311
3312 if (!nfs4_server_supports_acls(server))
3313 return -EOPNOTSUPP;
642ac549 3314 nfs_inode_return_delegation(inode);
4b580ee3 3315 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3316 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3317 nfs_access_zap_cache(inode);
3318 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3319 return ret;
3320}
3321
16b4289c
TM		 3322static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3323{
3324 struct nfs4_exception exception = { };
3325 int err;
3326 do {
3327 err = nfs4_handle_exception(NFS_SERVER(inode),
3328 __nfs4_proc_set_acl(inode, buf, buflen),
3329 &exception);
3330 } while (exception.retry);
3331 return err;
3332}
3333
1da177e4 3334static int
8328d59f 3335_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3336{
1da177e4
LT		 3337 if (!clp || task->tk_status >= 0)
3338 return 0;
3339 switch(task->tk_status) {
9e33bed5
TM		 3340 case -NFS4ERR_ADMIN_REVOKED:
3341 case -NFS4ERR_BAD_STATEID:
3342 case -NFS4ERR_OPENMODE:
3343 if (state == NULL)
3344 break;
3345 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3346 case -NFS4ERR_STALE_CLIENTID:
3347 case -NFS4ERR_STALE_STATEID:
3348 case -NFS4ERR_EXPIRED:
5d00837b 3349 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3350 nfs4_schedule_state_recovery(clp);
e005e804 3351 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3352 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3353 task->tk_status = 0;
3354 return -EAGAIN;
4745e315
AA		 3355#if defined(CONFIG_NFS_V4_1)
3356 case -NFS4ERR_BADSESSION:
3357 case -NFS4ERR_BADSLOT:
3358 case -NFS4ERR_BAD_HIGH_SLOT:
3359 case -NFS4ERR_DEADSESSION:
3360 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3361 case -NFS4ERR_SEQ_FALSE_RETRY:
3362 case -NFS4ERR_SEQ_MISORDERED:
3363 dprintk("%s ERROR %d, Reset session\n", __func__,
3364 task->tk_status);
6df08189 3365 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
4745e315
AA		 3366 task->tk_status = 0;
3367 return -EAGAIN;
3368#endif /* CONFIG_NFS_V4_1 */
1da177e4 3369 case -NFS4ERR_DELAY:
8328d59f
AA		 3370 if (server)
3371 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3372 case -NFS4ERR_GRACE:
1da177e4
LT		 3373 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3374 task->tk_status = 0;
3375 return -EAGAIN;
3376 case -NFS4ERR_OLD_STATEID:
3377 task->tk_status = 0;
3378 return -EAGAIN;
3379 }
3380 task->tk_status = nfs4_map_errors(task->tk_status);
3381 return 0;
3382}
3383
8328d59f
AA		 3384static int
3385nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3386{
3387 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3388}
3389
adfa6f98 3390int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3391{
3392 nfs4_verifier sc_verifier;
3393 struct nfs4_setclientid setclientid = {
3394 .sc_verifier = &sc_verifier,
3395 .sc_prog = program,
3396 };
3397 struct rpc_message msg = {
3398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3399 .rpc_argp = &setclientid,
3400 .rpc_resp = clp,
286d7d6a 3401 .rpc_cred = cred,
1da177e4 3402 };
bc4785cd 3403 __be32 *p;
1da177e4
LT		 3404 int loop = 0;
3405 int status;
3406
bc4785cd 3407 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3408 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3409 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3410
3411 for(;;) {
3412 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3413 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3414 clp->cl_ipaddr,
3415 rpc_peeraddr2str(clp->cl_rpcclient,
3416 RPC_DISPLAY_ADDR),
69dd716c
TM		 3417 rpc_peeraddr2str(clp->cl_rpcclient,
3418 RPC_DISPLAY_PROTO),
78ea323b 3419 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3420 clp->cl_id_uniquifier);
3421 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3422 sizeof(setclientid.sc_netid),
3423 rpc_peeraddr2str(clp->cl_rpcclient,
3424 RPC_DISPLAY_NETID));
1da177e4 3425 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3426 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3427 clp->cl_ipaddr, port >> 8, port & 255);
3428
3429 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3430 if (status != -NFS4ERR_CLID_INUSE)
3431 break;
3432 if (signalled())
3433 break;
3434 if (loop++ & 1)
3435 ssleep(clp->cl_lease_time + 1);
3436 else
3437 if (++clp->cl_id_uniquifier == 0)
3438 break;
3439 }
3440 return status;
3441}
3442
adfa6f98 3443static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3444{
3445 struct nfs_fsinfo fsinfo;
3446 struct rpc_message msg = {
3447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3448 .rpc_argp = clp,
3449 .rpc_resp = &fsinfo,
286d7d6a 3450 .rpc_cred = cred,
1da177e4
LT		 3451 };
3452 unsigned long now;
3453 int status;
3454
3455 now = jiffies;
3456 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3457 if (status == 0) {
3458 spin_lock(&clp->cl_lock);
3459 clp->cl_lease_time = fsinfo.lease_time * HZ;
3460 clp->cl_last_renewal = now;
3461 spin_unlock(&clp->cl_lock);
3462 }
3463 return status;
3464}
3465
adfa6f98 3466int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3467{
77e03677 3468 long timeout = 0;
51581f3b
TM		 3469 int err;
3470 do {
3471 err = _nfs4_proc_setclientid_confirm(clp, cred);
3472 switch (err) {
3473 case 0:
3474 return err;
3475 case -NFS4ERR_RESOURCE:
3476 /* The IBM lawyers misread another document! */
3477 case -NFS4ERR_DELAY:
3478 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3479 }
3480 } while (err == 0);
3481 return err;
3482}
3483
fe650407
TM		 3484struct nfs4_delegreturndata {
3485 struct nfs4_delegreturnargs args;
fa178f29 3486 struct nfs4_delegreturnres res;
fe650407
TM		 3487 struct nfs_fh fh;
3488 nfs4_stateid stateid;
26e976a8 3489 unsigned long timestamp;
fa178f29 3490 struct nfs_fattr fattr;
fe650407
TM		 3491 int rpc_status;
3492};
3493
fe650407
TM		 3494static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3495{
3496 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3497
3498 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3499 task->tk_status);
3500
fe650407 3501 data->rpc_status = task->tk_status;
26e976a8 3502 if (data->rpc_status == 0)
fa178f29 3503 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3504}
3505
3506static void nfs4_delegreturn_release(void *calldata)
3507{
fe650407
TM		 3508 kfree(calldata);
3509}
3510
938e1010
AA		 3511#if defined(CONFIG_NFS_V4_1)
3512static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3513{
3514 struct nfs4_delegreturndata *d_data;
3515
3516 d_data = (struct nfs4_delegreturndata *)data;
3517
3518 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3519 &d_data->args.seq_args,
3520 &d_data->res.seq_res, 1, task))
3521 return;
3522 rpc_call_start(task);
3523}
3524#endif /* CONFIG_NFS_V4_1 */
3525
c8d149f3 3526static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3527#if defined(CONFIG_NFS_V4_1)
3528 .rpc_call_prepare = nfs4_delegreturn_prepare,
3529#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3530 .rpc_call_done = nfs4_delegreturn_done,
3531 .rpc_release = nfs4_delegreturn_release,
3532};
3533
e6f81075 3534static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3535{
3536 struct nfs4_delegreturndata *data;
fa178f29 3537 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3538 struct rpc_task *task;
5138fde0
TM		 3539 struct rpc_message msg = {
3540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3541 .rpc_cred = cred,
3542 };
c970aa85
TM		 3543 struct rpc_task_setup task_setup_data = {
3544 .rpc_client = server->client,
5138fde0 3545 .rpc_message = &msg,
c970aa85
TM		 3546 .callback_ops = &nfs4_delegreturn_ops,
3547 .flags = RPC_TASK_ASYNC,
3548 };
e6f81075 3549 int status = 0;
fe650407 3550
938e1010 3551 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3552 if (data == NULL)
3553 return -ENOMEM;
3554 data->args.fhandle = &data->fh;
3555 data->args.stateid = &data->stateid;
fa178f29 3556 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3557 nfs_copy_fh(&data->fh, NFS_FH(inode));
3558 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3559 data->res.fattr = &data->fattr;
3560 data->res.server = server;
5f7dbd5c 3561 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3562 nfs_fattr_init(data->res.fattr);
26e976a8 3563 data->timestamp = jiffies;
fe650407
TM		 3564 data->rpc_status = 0;
3565
c970aa85 3566 task_setup_data.callback_data = data;
5138fde0
TM		 3567 msg.rpc_argp = &data->args,
3568 msg.rpc_resp = &data->res,
c970aa85 3569 task = rpc_run_task(&task_setup_data);
7a1218a2 3570 if (IS_ERR(task))
fe650407 3571 return PTR_ERR(task);
e6f81075
TM		 3572 if (!issync)
3573 goto out;
fe650407 3574 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3575 if (status != 0)
3576 goto out;
3577 status = data->rpc_status;
3578 if (status != 0)
3579 goto out;
3580 nfs_refresh_inode(inode, &data->fattr);
3581out:
e6b3c4db 3582 rpc_put_task(task);
fe650407 3583 return status;
1da177e4
LT		 3584}
3585
e6f81075 3586int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3587{
3588 struct nfs_server *server = NFS_SERVER(inode);
3589 struct nfs4_exception exception = { };
3590 int err;
3591 do {
e6f81075 3592 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3593 switch (err) {
3594 case -NFS4ERR_STALE_STATEID:
3595 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3596 case 0:
3597 return 0;
3598 }
3599 err = nfs4_handle_exception(server, err, &exception);
3600 } while (exception.retry);
3601 return err;
3602}
3603
3604#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3605#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3606
3607/*
3608 * sleep, with exponential backoff, and retry the LOCK operation.
3609 */
3610static unsigned long
3611nfs4_set_lock_task_retry(unsigned long timeout)
3612{
150030b7 3613 schedule_timeout_killable(timeout);
1da177e4
LT		 3614 timeout <<= 1;
3615 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3616 return NFS4_LOCK_MAXTIMEOUT;
3617 return timeout;
3618}
3619
1da177e4
LT		 3620static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3621{
3622 struct inode *inode = state->inode;
3623 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3624 struct nfs_client *clp = server->nfs_client;
911d1aaf 3625 struct nfs_lockt_args arg = {
1da177e4 3626 .fh = NFS_FH(inode),
911d1aaf 3627 .fl = request,
1da177e4 3628 };
911d1aaf
TM		 3629 struct nfs_lockt_res res = {
3630 .denied = request,
1da177e4
LT		 3631 };
3632 struct rpc_message msg = {
3633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3634 .rpc_argp = &arg,
3635 .rpc_resp = &res,
3636 .rpc_cred = state->owner->so_cred,
3637 };
1da177e4
LT		 3638 struct nfs4_lock_state *lsp;
3639 int status;
3640
911d1aaf 3641 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3642 status = nfs4_set_lock_state(state, request);
3643 if (status != 0)
3644 goto out;
3645 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3646 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3647 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3648 switch (status) {
3649 case 0:
3650 request->fl_type = F_UNLCK;
3651 break;
3652 case -NFS4ERR_DENIED:
3653 status = 0;
1da177e4 3654 }
70cc6487 3655 request->fl_ops->fl_release_private(request);
8d0a8a9d 3656out:
1da177e4
LT		 3657 return status;
3658}
3659
3660static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3661{
3662 struct nfs4_exception exception = { };
3663 int err;
3664
3665 do {
3666 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3667 _nfs4_proc_getlk(state, cmd, request),
3668 &exception);
3669 } while (exception.retry);
3670 return err;
3671}
3672
3673static int do_vfs_lock(struct file *file, struct file_lock *fl)
3674{
3675 int res = 0;
3676 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3677 case FL_POSIX:
3678 res = posix_lock_file_wait(file, fl);
3679 break;
3680 case FL_FLOCK:
3681 res = flock_lock_file_wait(file, fl);
3682 break;
3683 default:
3684 BUG();
3685 }
1da177e4
LT		 3686 return res;
3687}
3688
faf5f49c 3689struct nfs4_unlockdata {
911d1aaf
TM		 3690 struct nfs_locku_args arg;
3691 struct nfs_locku_res res;
faf5f49c
TM		 3692 struct nfs4_lock_state *lsp;
3693 struct nfs_open_context *ctx;
911d1aaf
TM		 3694 struct file_lock fl;
3695 const struct nfs_server *server;
26e976a8 3696 unsigned long timestamp;
faf5f49c
TM		 3697};
3698
911d1aaf
TM		 3699static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3700 struct nfs_open_context *ctx,
3701 struct nfs4_lock_state *lsp,
3702 struct nfs_seqid *seqid)
3703{
3704 struct nfs4_unlockdata *p;
3705 struct inode *inode = lsp->ls_state->inode;
3706
a893693c 3707 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3708 if (p == NULL)
3709 return NULL;
3710 p->arg.fh = NFS_FH(inode);
3711 p->arg.fl = &p->fl;
3712 p->arg.seqid = seqid;
c1d51931 3713 p->res.seqid = seqid;
5f7dbd5c 3714 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3715 p->arg.stateid = &lsp->ls_stateid;
3716 p->lsp = lsp;
3717 atomic_inc(&lsp->ls_count);
3718 /* Ensure we don't close file until we're done freeing locks! */
3719 p->ctx = get_nfs_open_context(ctx);
3720 memcpy(&p->fl, fl, sizeof(p->fl));
3721 p->server = NFS_SERVER(inode);
3722 return p;
3723}
3724
06f814a3 3725static void nfs4_locku_release_calldata(void *data)
faf5f49c 3726{
963d8fe5 3727 struct nfs4_unlockdata *calldata = data;
911d1aaf 3728 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3729 nfs4_put_lock_state(calldata->lsp);
3730 put_nfs_open_context(calldata->ctx);
3731 kfree(calldata);
faf5f49c
TM		 3732}
3733
963d8fe5 3734static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3735{
963d8fe5 3736 struct nfs4_unlockdata *calldata = data;
faf5f49c 3737
a893693c
AA		 3738 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3739 task->tk_status);
06f814a3
TM		 3740 if (RPC_ASSASSINATED(task))
3741 return;
faf5f49c
TM		 3742 switch (task->tk_status) {
3743 case 0:
3744 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3745 calldata->res.stateid.data,
faf5f49c 3746 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3747 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3748 break;
9e33bed5
TM		 3749 case -NFS4ERR_BAD_STATEID:
3750 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3751 case -NFS4ERR_STALE_STATEID:
3752 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3753 break;
3754 default:
9e33bed5 3755 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e 3756 nfs4_restart_rpc(task,
e608e79f
AA		 3757 calldata->server->nfs_client,
3758 &calldata->res.seq_res);
faf5f49c 3759 }
a893693c
AA		 3760 nfs4_sequence_free_slot(calldata->server->nfs_client,
3761 &calldata->res.seq_res);
faf5f49c
TM		 3762}
3763
4ce70ada 3764static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3765{
4ce70ada 3766 struct nfs4_unlockdata *calldata = data;
faf5f49c 3767
911d1aaf 3768 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3769 return;
3770 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3771 /* Note: exit _without_ running nfs4_locku_done */
3772 task->tk_action = NULL;
faf5f49c
TM		 3773 return;
3774 }
26e976a8 3775 calldata->timestamp = jiffies;
a893693c
AA		 3776 if (nfs4_setup_sequence(calldata->server->nfs_client,
3777 &calldata->arg.seq_args,
3778 &calldata->res.seq_res, 1, task))
3779 return;
5138fde0 3780 rpc_call_start(task);
faf5f49c
TM		 3781}
3782
963d8fe5 3783static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3784 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3785 .rpc_call_done = nfs4_locku_done,
06f814a3 3786 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3787};
3788
a5d16a4d
TM		 3789static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3790 struct nfs_open_context *ctx,
3791 struct nfs4_lock_state *lsp,
3792 struct nfs_seqid *seqid)
3793{
3794 struct nfs4_unlockdata *data;
5138fde0
TM		 3795 struct rpc_message msg = {
3796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3797 .rpc_cred = ctx->cred,
3798 };
c970aa85
TM		 3799 struct rpc_task_setup task_setup_data = {
3800 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3801 .rpc_message = &msg,
c970aa85 3802 .callback_ops = &nfs4_locku_ops,
101070ca 3803 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3804 .flags = RPC_TASK_ASYNC,
3805 };
a5d16a4d 3806
137d6aca
FF		 3807 /* Ensure this is an unlock - when canceling a lock, the
3808 * canceled lock is passed in, and it won't be an unlock.
3809 */
3810 fl->fl_type = F_UNLCK;
3811
a5d16a4d
TM		 3812 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3813 if (data == NULL) {
3814 nfs_free_seqid(seqid);
3815 return ERR_PTR(-ENOMEM);
3816 }
3817
5138fde0
TM		 3818 msg.rpc_argp = &data->arg,
3819 msg.rpc_resp = &data->res,
c970aa85
TM		 3820 task_setup_data.callback_data = data;
3821 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3822}
3823
faf5f49c
TM		 3824static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3825{
19e03c57 3826 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3827 struct nfs_seqid *seqid;
1da177e4 3828 struct nfs4_lock_state *lsp;
06f814a3
TM		 3829 struct rpc_task *task;
3830 int status = 0;
536ff0f8 3831 unsigned char fl_flags = request->fl_flags;
faf5f49c 3832
8d0a8a9d 3833 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3834 /* Unlock _before_ we do the RPC call */
3835 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3836 down_read(&nfsi->rwsem);
3837 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3838 up_read(&nfsi->rwsem);
9b073574 3839 goto out;
19e03c57
TM		 3840 }
3841 up_read(&nfsi->rwsem);
8d0a8a9d 3842 if (status != 0)
9b073574
TM		 3843 goto out;
3844 /* Is this a delegated lock? */
3845 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3846 goto out;
8d0a8a9d 3847 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3848 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3849 status = -ENOMEM;
911d1aaf 3850 if (seqid == NULL)
9b073574 3851 goto out;
cd3758e3 3852 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3853 status = PTR_ERR(task);
3854 if (IS_ERR(task))
9b073574 3855 goto out;
a5d16a4d 3856 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3857 rpc_put_task(task);
9b073574 3858out:
536ff0f8 3859 request->fl_flags = fl_flags;
1da177e4
LT		 3860 return status;
3861}
3862
a5d16a4d
TM		 3863struct nfs4_lockdata {
3864 struct nfs_lock_args arg;
3865 struct nfs_lock_res res;
3866 struct nfs4_lock_state *lsp;
3867 struct nfs_open_context *ctx;
3868 struct file_lock fl;
26e976a8 3869 unsigned long timestamp;
a5d16a4d
TM		 3870 int rpc_status;
3871 int cancelled;
66179efe 3872 struct nfs_server *server;
a5d16a4d
TM		 3873};
3874
3875static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3876 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3877{
a5d16a4d
TM		 3878 struct nfs4_lockdata *p;
3879 struct inode *inode = lsp->ls_state->inode;
1da177e4 3880 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3881
3882 p = kzalloc(sizeof(*p), GFP_KERNEL);
3883 if (p == NULL)
3884 return NULL;
3885
3886 p->arg.fh = NFS_FH(inode);
3887 p->arg.fl = &p->fl;
2f74c0a0
TM		 3888 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3889 if (p->arg.open_seqid == NULL)
3890 goto out_free;
a5d16a4d
TM		 3891 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3892 if (p->arg.lock_seqid == NULL)
2f74c0a0 3893 goto out_free_seqid;
a5d16a4d 3894 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3895 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3896 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3897 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3898 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3899 p->lsp = lsp;
66179efe 3900 p->server = server;
a5d16a4d
TM		 3901 atomic_inc(&lsp->ls_count);
3902 p->ctx = get_nfs_open_context(ctx);
3903 memcpy(&p->fl, fl, sizeof(p->fl));
3904 return p;
2f74c0a0
TM		 3905out_free_seqid:
3906 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3907out_free:
3908 kfree(p);
3909 return NULL;
3910}
3911
3912static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3913{
3914 struct nfs4_lockdata *data = calldata;
3915 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3916
3110ff80 3917 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3918 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3919 return;
a5d16a4d
TM		 3920 /* Do we need to do an open_to_lock_owner? */
3921 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3922 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3923 return;
a5d16a4d
TM		 3924 data->arg.open_stateid = &state->stateid;
3925 data->arg.new_lock_owner = 1;
c1d51931 3926 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3927 } else
3928 data->arg.new_lock_owner = 0;
26e976a8 3929 data->timestamp = jiffies;
66179efe
AA		 3930 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3931 &data->res.seq_res, 1, task))
3932 return;
5138fde0 3933 rpc_call_start(task);
3110ff80 3934 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3935}
3936
3937static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3938{
3939 struct nfs4_lockdata *data = calldata;
3940
3110ff80 3941 dprintk("%s: begin!\n", __func__);
a5d16a4d 3942
66179efe
AA		 3943 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3944 task->tk_status);
3945
a5d16a4d
TM		 3946 data->rpc_status = task->tk_status;
3947 if (RPC_ASSASSINATED(task))
3948 goto out;
3949 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3950 if (data->rpc_status == 0)
3951 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3952 else
3953 goto out;
3954 }
3955 if (data->rpc_status == 0) {
3956 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3957 sizeof(data->lsp->ls_stateid.data));
3958 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3959 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3960 }
a5d16a4d 3961out:
3110ff80 3962 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3963}
3964
3965static void nfs4_lock_release(void *calldata)
3966{
3967 struct nfs4_lockdata *data = calldata;
3968
3110ff80 3969 dprintk("%s: begin!\n", __func__);
2f74c0a0 3970 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3971 if (data->cancelled != 0) {
3972 struct rpc_task *task;
3973 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3974 data->arg.lock_seqid);
3975 if (!IS_ERR(task))
e6b3c4db 3976 rpc_put_task(task);
3110ff80 3977 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3978 } else
3979 nfs_free_seqid(data->arg.lock_seqid);
3980 nfs4_put_lock_state(data->lsp);
3981 put_nfs_open_context(data->ctx);
3982 kfree(data);
3110ff80 3983 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3984}
3985
3986static const struct rpc_call_ops nfs4_lock_ops = {
3987 .rpc_call_prepare = nfs4_lock_prepare,
3988 .rpc_call_done = nfs4_lock_done,
3989 .rpc_release = nfs4_lock_release,
3990};
3991
3992static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3993{
3994 struct nfs4_lockdata *data;
3995 struct rpc_task *task;
5138fde0
TM		 3996 struct rpc_message msg = {
3997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3998 .rpc_cred = state->owner->so_cred,
3999 };
c970aa85
TM		 4000 struct rpc_task_setup task_setup_data = {
4001 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4002 .rpc_message = &msg,
c970aa85 4003 .callback_ops = &nfs4_lock_ops,
101070ca 4004 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4005 .flags = RPC_TASK_ASYNC,
4006 };
a5d16a4d
TM		 4007 int ret;
4008
3110ff80 4009 dprintk("%s: begin!\n", __func__);
cd3758e3 4010 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4011 fl->fl_u.nfs4_fl.owner);
4012 if (data == NULL)
4013 return -ENOMEM;
4014 if (IS_SETLKW(cmd))
4015 data->arg.block = 1;
4016 if (reclaim != 0)
4017 data->arg.reclaim = 1;
5138fde0
TM		 4018 msg.rpc_argp = &data->arg,
4019 msg.rpc_resp = &data->res,
c970aa85
TM		 4020 task_setup_data.callback_data = data;
4021 task = rpc_run_task(&task_setup_data);
7a1218a2 4022 if (IS_ERR(task))
a5d16a4d 4023 return PTR_ERR(task);
a5d16a4d
TM		 4024 ret = nfs4_wait_for_completion_rpc_task(task);
4025 if (ret == 0) {
4026 ret = data->rpc_status;
a5d16a4d
TM		 4027 } else
4028 data->cancelled = 1;
e6b3c4db 4029 rpc_put_task(task);
3110ff80 4030 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4031 return ret;
1da177e4
LT		 4032}
4033
4034static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4035{
202b50dc
TM		 4036 struct nfs_server *server = NFS_SERVER(state->inode);
4037 struct nfs4_exception exception = { };
4038 int err;
4039
4040 do {
42a2d13e
TM		 4041 /* Cache the lock if possible... */
4042 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4043 return 0;
202b50dc
TM		 4044 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4045 if (err != -NFS4ERR_DELAY)
4046 break;
4047 nfs4_handle_exception(server, err, &exception);
4048 } while (exception.retry);
4049 return err;
1da177e4
LT		 4050}
4051
4052static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4053{
202b50dc
TM		 4054 struct nfs_server *server = NFS_SERVER(state->inode);
4055 struct nfs4_exception exception = { };
4056 int err;
4057
6bfc93ef
TM		 4058 err = nfs4_set_lock_state(state, request);
4059 if (err != 0)
4060 return err;
202b50dc 4061 do {
42a2d13e
TM		 4062 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4063 return 0;
202b50dc 4064 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
a9ed2e25
TM		 4065 switch (err) {
4066 default:
4067 goto out;
4068 case -NFS4ERR_GRACE:
4069 case -NFS4ERR_DELAY:
4070 nfs4_handle_exception(server, err, &exception);
4071 err = 0;
4072 }
202b50dc 4073 } while (exception.retry);
a9ed2e25 4074out:
202b50dc 4075 return err;
1da177e4
LT		 4076}
4077
4078static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4079{
19e03c57 4080 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4081 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4082 int status;
4083
6bfc93ef 4084 /* Is this a delegated open? */
6bfc93ef
TM		 4085 status = nfs4_set_lock_state(state, request);
4086 if (status != 0)
4087 goto out;
01c3b861
TM		 4088 request->fl_flags |= FL_ACCESS;
4089 status = do_vfs_lock(request->fl_file, request);
4090 if (status < 0)
4091 goto out;
19e03c57 4092 down_read(&nfsi->rwsem);
01c3b861 4093 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4094 /* Yes: cache locks! */
01c3b861 4095 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4096 request->fl_flags = fl_flags & ~FL_SLEEP;
4097 status = do_vfs_lock(request->fl_file, request);
4098 goto out_unlock;
01c3b861 4099 }
6bfc93ef
TM		 4100 status = _nfs4_do_setlk(state, cmd, request, 0);
4101 if (status != 0)
01c3b861 4102 goto out_unlock;
6bfc93ef 4103 /* Note: we always want to sleep here! */
01c3b861 4104 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4105 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4106 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4107out_unlock:
19e03c57 4108 up_read(&nfsi->rwsem);
01c3b861
TM		 4109out:
4110 request->fl_flags = fl_flags;
1da177e4
LT		 4111 return status;
4112}
4113
4114static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4115{
4116 struct nfs4_exception exception = { };
4117 int err;
4118
4119 do {
965b5d67
TM		 4120 err = _nfs4_proc_setlk(state, cmd, request);
4121 if (err == -NFS4ERR_DENIED)
4122 err = -EAGAIN;
1da177e4 4123 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4124 err, &exception);
1da177e4
LT		 4125 } while (exception.retry);
4126 return err;
4127}
4128
4129static int
4130nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4131{
4132 struct nfs_open_context *ctx;
4133 struct nfs4_state *state;
4134 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4135 int status;
4136
4137 /* verify open state */
cd3758e3 4138 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4139 state = ctx->state;
4140
4141 if (request->fl_start < 0 || request->fl_end < 0)
4142 return -EINVAL;
4143
d953126a
TM		 4144 if (IS_GETLK(cmd)) {
4145 if (state != NULL)
4146 return nfs4_proc_getlk(state, F_GETLK, request);
4147 return 0;
4148 }
1da177e4
LT		 4149
4150 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4151 return -EINVAL;
4152
d953126a
TM		 4153 if (request->fl_type == F_UNLCK) {
4154 if (state != NULL)
4155 return nfs4_proc_unlck(state, cmd, request);
4156 return 0;
4157 }
1da177e4 4158
d953126a
TM		 4159 if (state == NULL)
4160 return -ENOLCK;
1da177e4
LT		 4161 do {
4162 status = nfs4_proc_setlk(state, cmd, request);
4163 if ((status != -EAGAIN) || IS_SETLK(cmd))
4164 break;
4165 timeout = nfs4_set_lock_task_retry(timeout);
4166 status = -ERESTARTSYS;
4167 if (signalled())
4168 break;
4169 } while(status < 0);
1da177e4
LT		 4170 return status;
4171}
4172
888e694c
TM		 4173int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4174{
4175 struct nfs_server *server = NFS_SERVER(state->inode);
4176 struct nfs4_exception exception = { };
4177 int err;
4178
4179 err = nfs4_set_lock_state(state, fl);
4180 if (err != 0)
4181 goto out;
4182 do {
4183 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4184 switch (err) {
4185 default:
4186 printk(KERN_ERR "%s: unhandled error %d.\n",
4187 __func__, err);
4188 case 0:
965b5d67 4189 case -ESTALE:
d5122201
TM		 4190 goto out;
4191 case -NFS4ERR_EXPIRED:
4192 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4193 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4194 nfs4_schedule_state_recovery(server->nfs_client);
4195 goto out;
965b5d67
TM		 4196 case -ERESTARTSYS:
4197 /*
4198 * The show must go on: exit, but mark the
4199 * stateid as needing recovery.
4200 */
4201 case -NFS4ERR_ADMIN_REVOKED:
4202 case -NFS4ERR_BAD_STATEID:
4203 case -NFS4ERR_OPENMODE:
4204 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4205 err = 0;
4206 goto out;
4207 case -ENOMEM:
4208 case -NFS4ERR_DENIED:
4209 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4210 err = 0;
4211 goto out;
d5122201
TM		 4212 case -NFS4ERR_DELAY:
4213 break;
4214 }
888e694c
TM		 4215 err = nfs4_handle_exception(server, err, &exception);
4216 } while (exception.retry);
4217out:
4218 return err;
4219}
6b3b5496 4220
aa1870af
BF		 4221#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4222
6b3b5496
BF		 4223int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4224 size_t buflen, int flags)
4225{
4b580ee3
BF		 4226 struct inode *inode = dentry->d_inode;
4227
4228 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4229 return -EOPNOTSUPP;
4230
4b580ee3 4231 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4232}
4233
4234/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4235 * and that's what we'll do for e.g. user attributes that haven't been set.
4236 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4237 * attributes in kernel-managed attribute namespaces. */
4238ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4239 size_t buflen)
4240{
aa1870af
BF		 4241 struct inode *inode = dentry->d_inode;
4242
4243 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4244 return -EOPNOTSUPP;
4245
4246 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4247}
4248
4249ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4250{
aa1870af 4251 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4252
096455a2
BF		 4253 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4254 return 0;
6b3b5496
BF		 4255 if (buf && buflen < len)
4256 return -ERANGE;
4257 if (buf)
aa1870af
BF		 4258 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4259 return len;
6b3b5496
BF		 4260}
4261
69aaaae1
TM		 4262static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4263{
4264 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4265 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4266 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4267 return;
4268
4269 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4270 NFS_ATTR_FATTR_NLINK;
4271 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4272 fattr->nlink = 2;
4273}
4274
56659e99 4275int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4276 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4277{
4278 struct nfs_server *server = NFS_SERVER(dir);
4279 u32 bitmask[2] = {
361e624f
MN		 4280 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4281 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4282 };
4283 struct nfs4_fs_locations_arg args = {
4284 .dir_fh = NFS_FH(dir),
c228fd3a 4285 .name = name,
683b57b4
TM		 4286 .page = page,
4287 .bitmask = bitmask,
4288 };
22958463
BH		 4289 struct nfs4_fs_locations_res res = {
4290 .fs_locations = fs_locations,
4291 };
683b57b4
TM		 4292 struct rpc_message msg = {
4293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4294 .rpc_argp = &args,
22958463 4295 .rpc_resp = &res,
683b57b4
TM		 4296 };
4297 int status;
4298
3110ff80 4299 dprintk("%s: start\n", __func__);
c228fd3a 4300 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4301 fs_locations->server = server;
830b8e33 4302 fs_locations->nlocations = 0;
cccef3b9 4303 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4304 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4305 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4306 return status;
4307}
4308
557134a3 4309#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4310/*
4311 * nfs4_proc_exchange_id()
4312 *
4313 * Since the clientid has expired, all compounds using sessions
4314 * associated with the stale clientid will be returning
4315 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4316 * be in some phase of session reset.
4317 */
4d643d1d 4318int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 4319{
4320 nfs4_verifier verifier;
4321 struct nfs41_exchange_id_args args = {
4322 .client = clp,
4323 .flags = clp->cl_exchange_flags,
4324 };
4325 struct nfs41_exchange_id_res res = {
4326 .client = clp,
4327 };
4328 int status;
4329 struct rpc_message msg = {
4330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4331 .rpc_argp = &args,
4332 .rpc_resp = &res,
4333 .rpc_cred = cred,
4334 };
4335 __be32 *p;
4336
4337 dprintk("--> %s\n", __func__);
4338 BUG_ON(clp == NULL);
a7b72103 4339
99fe60d0
BH		 4340 p = (u32 *)verifier.data;
4341 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4342 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4343 args.verifier = &verifier;
4344
4345 while (1) {
4346 args.id_len = scnprintf(args.id, sizeof(args.id),
4347 "%s/%s %u",
4348 clp->cl_ipaddr,
4349 rpc_peeraddr2str(clp->cl_rpcclient,
4350 RPC_DISPLAY_ADDR),
4351 clp->cl_id_uniquifier);
4352
4353 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4354
4355 if (status != NFS4ERR_CLID_INUSE)
4356 break;
4357
4358 if (signalled())
4359 break;
4360
4361 if (++clp->cl_id_uniquifier == 0)
4362 break;
4363 }
4364
4365 dprintk("<-- %s status= %d\n", __func__, status);
4366 return status;
4367}
4368
2050f0cc
AA		 4369struct nfs4_get_lease_time_data {
4370 struct nfs4_get_lease_time_args *args;
4371 struct nfs4_get_lease_time_res *res;
4372 struct nfs_client *clp;
4373};
4374
4375static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4376 void *calldata)
4377{
4378 int ret;
4379 struct nfs4_get_lease_time_data *data =
4380 (struct nfs4_get_lease_time_data *)calldata;
4381
4382 dprintk("--> %s\n", __func__);
4383 /* just setup sequence, do not trigger session recovery
4384 since we're invoked within one */
4385 ret = nfs41_setup_sequence(data->clp->cl_session,
4386 &data->args->la_seq_args,
4387 &data->res->lr_seq_res, 0, task);
4388
4389 BUG_ON(ret == -EAGAIN);
4390 rpc_call_start(task);
4391 dprintk("<-- %s\n", __func__);
4392}
4393
4394/*
4395 * Called from nfs4_state_manager thread for session setup, so don't recover
4396 * from sequence operation or clientid errors.
4397 */
4398static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4399{
4400 struct nfs4_get_lease_time_data *data =
4401 (struct nfs4_get_lease_time_data *)calldata;
4402
4403 dprintk("--> %s\n", __func__);
4404 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4405 switch (task->tk_status) {
4406 case -NFS4ERR_DELAY:
4407 case -NFS4ERR_GRACE:
4408 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4409 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4410 task->tk_status = 0;
1d9ddde9 4411 rpc_restart_call(task);
2050f0cc
AA		 4412 return;
4413 }
4414 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4415 dprintk("<-- %s\n", __func__);
4416}
4417
4418struct rpc_call_ops nfs4_get_lease_time_ops = {
4419 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4420 .rpc_call_done = nfs4_get_lease_time_done,
4421};
4422
4423int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4424{
4425 struct rpc_task *task;
4426 struct nfs4_get_lease_time_args args;
4427 struct nfs4_get_lease_time_res res = {
4428 .lr_fsinfo = fsinfo,
4429 };
4430 struct nfs4_get_lease_time_data data = {
4431 .args = &args,
4432 .res = &res,
4433 .clp = clp,
4434 };
4435 struct rpc_message msg = {
4436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4437 .rpc_argp = &args,
4438 .rpc_resp = &res,
4439 };
4440 struct rpc_task_setup task_setup = {
4441 .rpc_client = clp->cl_rpcclient,
4442 .rpc_message = &msg,
4443 .callback_ops = &nfs4_get_lease_time_ops,
4444 .callback_data = &data
4445 };
4446 int status;
4447
4448 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4449 dprintk("--> %s\n", __func__);
4450 task = rpc_run_task(&task_setup);
4451
4452 if (IS_ERR(task))
4453 status = PTR_ERR(task);
4454 else {
4455 status = task->tk_status;
4456 rpc_put_task(task);
4457 }
4458 dprintk("<-- %s return %d\n", __func__, status);
4459
4460 return status;
4461}
4462
b73dafa7
RL		 4463/*
4464 * Reset a slot table
4465 */
4466static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4467 int old_max_slots, int ivalue)
ac72b7b3 4468{
b73dafa7 4469 int i;
ac72b7b3
AA		 4470 int ret = 0;
4471
b73dafa7 4472 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4473
b73dafa7
RL		 4474 /*
4475 * Until we have dynamic slot table adjustment, insist
4476 * upon the same slot table size
4477 */
ac72b7b3
AA		 4478 if (max_slots != old_max_slots) {
4479 dprintk("%s reset slot table does't match old\n",
4480 __func__);
4481 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4482 goto out;
4483 }
4484 spin_lock(&tbl->slot_tbl_lock);
4485 for (i = 0; i < max_slots; ++i)
b73dafa7 4486 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4487 tbl->highest_used_slotid = -1;
4488 spin_unlock(&tbl->slot_tbl_lock);
4489 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4490 tbl, tbl->slots, tbl->max_slots);
4491out:
4492 dprintk("<-- %s: return %d\n", __func__, ret);
4493 return ret;
4494}
4495
b73dafa7
RL		 4496/*
4497 * Reset the forechannel and backchannel slot tables
4498 */
4499static int nfs4_reset_slot_tables(struct nfs4_session *session)
4500{
4501 int status;
4502
4503 status = nfs4_reset_slot_table(&session->fc_slot_table,
4504 session->fc_attrs.max_reqs,
4505 session->fc_slot_table.max_slots,
4506 1);
f8625a6a
RL		 4507 if (status)
4508 return status;
4509
4510 status = nfs4_reset_slot_table(&session->bc_slot_table,
4511 session->bc_attrs.max_reqs,
4512 session->bc_slot_table.max_slots,
4513 0);
b73dafa7
RL		 4514 return status;
4515}
4516
f8625a6a
RL		 4517/* Destroy the slot table */
4518static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4519{
4520 if (session->fc_slot_table.slots != NULL) {
4521 kfree(session->fc_slot_table.slots);
4522 session->fc_slot_table.slots = NULL;
4523 }
4524 if (session->bc_slot_table.slots != NULL) {
4525 kfree(session->bc_slot_table.slots);
4526 session->bc_slot_table.slots = NULL;
4527 }
4528 return;
4529}
4530
fc931582
AA		 4531/*
4532 * Initialize slot table
4533 */
050047ce
RL		 4534static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4535 int max_slots, int ivalue)
fc931582 4536{
050047ce 4537 int i;
fc931582
AA		 4538 struct nfs4_slot *slot;
4539 int ret = -ENOMEM;
4540
4541 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4542
050047ce 4543 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4544
4545 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4546 if (!slot)
4547 goto out;
4548 for (i = 0; i < max_slots; ++i)
050047ce 4549 slot[i].seq_nr = ivalue;
fc931582
AA		 4550 ret = 0;
4551
4552 spin_lock(&tbl->slot_tbl_lock);
4553 if (tbl->slots != NULL) {
4554 spin_unlock(&tbl->slot_tbl_lock);
4555 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4556 __func__, tbl, tbl->slots);
4557 WARN_ON(1);
4558 goto out_free;
4559 }
4560 tbl->max_slots = max_slots;
4561 tbl->slots = slot;
4562 tbl->highest_used_slotid = -1; /* no slot is currently used */
4563 spin_unlock(&tbl->slot_tbl_lock);
4564 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4565 tbl, tbl->slots, tbl->max_slots);
4566out:
4567 dprintk("<-- %s: return %d\n", __func__, ret);
4568 return ret;
050047ce 4569
fc931582
AA		 4570out_free:
4571 kfree(slot);
4572 goto out;
4573}
4574
050047ce
RL		 4575/*
4576 * Initialize the forechannel and backchannel tables
4577 */
4578static int nfs4_init_slot_tables(struct nfs4_session *session)
4579{
4580 int status;
4581
4582 status = nfs4_init_slot_table(&session->fc_slot_table,
4583 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4584 if (status)
4585 return status;
050047ce 4586
f8625a6a
RL		 4587 status = nfs4_init_slot_table(&session->bc_slot_table,
4588 session->bc_attrs.max_reqs, 0);
4589 if (status)
4590 nfs4_destroy_slot_tables(session);
4591
4592 return status;
557134a3
AA		 4593}
4594
4595struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4596{
4597 struct nfs4_session *session;
4598 struct nfs4_slot_table *tbl;
4599
4600 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4601 if (!session)
4602 return NULL;
76db6d95 4603
76db6d95
AA		 4604 /*
4605 * The create session reply races with the server back
4606 * channel probe. Mark the client NFS_CS_SESSION_INITING
4607 * so that the client back channel can find the
4608 * nfs_client struct
4609 */
4610 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4611
557134a3
AA		 4612 tbl = &session->fc_slot_table;
4613 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4614 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4615
4616 tbl = &session->bc_slot_table;
4617 spin_lock_init(&tbl->slot_tbl_lock);
4618 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4619
557134a3
AA		 4620 session->clp = clp;
4621 return session;
4622}
4623
4624void nfs4_destroy_session(struct nfs4_session *session)
4625{
5a0ffe54
AA		 4626 nfs4_proc_destroy_session(session);
4627 dprintk("%s Destroy backchannel for xprt %p\n",
4628 __func__, session->clp->cl_rpcclient->cl_xprt);
4629 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4630 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4631 nfs4_destroy_slot_tables(session);
557134a3
AA		 4632 kfree(session);
4633}
4634
fc931582
AA		 4635/*
4636 * Initialize the values to be used by the client in CREATE_SESSION
4637 * If nfs4_init_session set the fore channel request and response sizes,
4638 * use them.
4639 *
4640 * Set the back channel max_resp_sz_cached to zero to force the client to
4641 * always set csa_cachethis to FALSE because the current implementation
4642 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4643 */
4644static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4645{
4646 struct nfs4_session *session = args->client->cl_session;
4647 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4648 mxresp_sz = session->fc_attrs.max_resp_sz;
4649
4650 if (mxrqst_sz == 0)
4651 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4652 if (mxresp_sz == 0)
4653 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4654 /* Fore channel attributes */
4655 args->fc_attrs.headerpadsz = 0;
4656 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4657 args->fc_attrs.max_resp_sz = mxresp_sz;
4658 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4659 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4660 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4661
4662 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4663 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4664 __func__,
4665 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4666 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4667 args->fc_attrs.max_reqs);
4668
4669 /* Back channel attributes */
4670 args->bc_attrs.headerpadsz = 0;
4671 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4672 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4673 args->bc_attrs.max_resp_sz_cached = 0;
4674 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4675 args->bc_attrs.max_reqs = 1;
4676
4677 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4678 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4679 __func__,
4680 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4681 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4682 args->bc_attrs.max_reqs);
4683}
4684
8d35301d
AA		 4685static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4686{
4687 if (rcvd <= sent)
4688 return 0;
4689 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4690 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4691 return -EINVAL;
4692}
4693
4694#define _verify_fore_channel_attr(_name_) \
4695 _verify_channel_attr("fore", #_name_, \
4696 args->fc_attrs._name_, \
4697 session->fc_attrs._name_)
4698
4699#define _verify_back_channel_attr(_name_) \
4700 _verify_channel_attr("back", #_name_, \
4701 args->bc_attrs._name_, \
4702 session->bc_attrs._name_)
4703
4704/*
4705 * The server is not allowed to increase the fore channel header pad size,
4706 * maximum response size, or maximum number of operations.
4707 *
4708 * The back channel attributes are only negotiatied down: We send what the
4709 * (back channel) server insists upon.
4710 */
4711static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4712 struct nfs4_session *session)
4713{
4714 int ret = 0;
4715
4716 ret |= _verify_fore_channel_attr(headerpadsz);
4717 ret |= _verify_fore_channel_attr(max_resp_sz);
4718 ret |= _verify_fore_channel_attr(max_ops);
4719
4720 ret |= _verify_back_channel_attr(headerpadsz);
4721 ret |= _verify_back_channel_attr(max_rqst_sz);
4722 ret |= _verify_back_channel_attr(max_resp_sz);
4723 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4724 ret |= _verify_back_channel_attr(max_ops);
4725 ret |= _verify_back_channel_attr(max_reqs);
4726
4727 return ret;
4728}
4729
fc931582
AA		 4730static int _nfs4_proc_create_session(struct nfs_client *clp)
4731{
4732 struct nfs4_session *session = clp->cl_session;
4733 struct nfs41_create_session_args args = {
4734 .client = clp,
4735 .cb_program = NFS4_CALLBACK,
4736 };
4737 struct nfs41_create_session_res res = {
4738 .client = clp,
4739 };
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4742 .rpc_argp = &args,
4743 .rpc_resp = &res,
4744 };
4745 int status;
4746
4747 nfs4_init_channel_attrs(&args);
0f91421e 4748 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4749
4750 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4751
8d35301d
AA		 4752 if (!status)
4753 /* Verify the session's negotiated channel_attrs values */
4754 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4755 if (!status) {
4756 /* Increment the clientid slot sequence id */
4757 clp->cl_seqid++;
4758 }
4759
4760 return status;
4761}
4762
4763/*
4764 * Issues a CREATE_SESSION operation to the server.
4765 * It is the responsibility of the caller to verify the session is
4766 * expired before calling this routine.
4767 */
ac72b7b3 4768int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4769{
4770 int status;
4771 unsigned *ptr;
4772 struct nfs_fsinfo fsinfo;
4773 struct nfs4_session *session = clp->cl_session;
4774
4775 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4776
4777 status = _nfs4_proc_create_session(clp);
4778 if (status)
4779 goto out;
4780
ac72b7b3
AA		 4781 /* Init or reset the fore channel */
4782 if (reset)
b73dafa7 4783 status = nfs4_reset_slot_tables(session);
ac72b7b3 4784 else
050047ce 4785 status = nfs4_init_slot_tables(session);
fc931582
AA		 4786 dprintk("fore channel slot table initialization returned %d\n", status);
4787 if (status)
4788 goto out;
4789
4790 ptr = (unsigned *)&session->sess_id.data[0];
4791 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4792 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4793
ac72b7b3
AA		 4794 if (reset)
4795 /* Lease time is aleady set */
4796 goto out;
4797
fc931582
AA		 4798 /* Get the lease time */
4799 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4800 if (status == 0) {
4801 /* Update lease time and schedule renewal */
4802 spin_lock(&clp->cl_lock);
4803 clp->cl_lease_time = fsinfo.lease_time * HZ;
4804 clp->cl_last_renewal = jiffies;
4805 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4806 spin_unlock(&clp->cl_lock);
4807
4808 nfs4_schedule_state_renewal(clp);
4809 }
4810out:
4811 dprintk("<-- %s\n", __func__);
4812 return status;
4813}
4814
0f3e66c6
AA		 4815/*
4816 * Issue the over-the-wire RPC DESTROY_SESSION.
4817 * The caller must serialize access to this routine.
4818 */
4819int nfs4_proc_destroy_session(struct nfs4_session *session)
4820{
4821 int status = 0;
4822 struct rpc_message msg;
4823
4824 dprintk("--> nfs4_proc_destroy_session\n");
4825
4826 /* session is still being setup */
4827 if (session->clp->cl_cons_state != NFS_CS_READY)
4828 return status;
4829
4830 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4831 msg.rpc_argp = session;
4832 msg.rpc_resp = NULL;
4833 msg.rpc_cred = NULL;
4834 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4835
4836 if (status)
4837 printk(KERN_WARNING
4838 "Got error %d from the server on DESTROY_SESSION. "
4839 "Session has been destroyed regardless...\n", status);
4840
4841 dprintk("<-- nfs4_proc_destroy_session\n");
4842 return status;
4843}
4844
fccba804
TM		 4845int nfs4_init_session(struct nfs_server *server)
4846{
4847 struct nfs_client *clp = server->nfs_client;
4848 int ret;
4849
4850 if (!nfs4_has_session(clp))
4851 return 0;
4852
4853 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4854 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4855 ret = nfs4_recover_expired_lease(server);
4856 if (!ret)
4857 ret = nfs4_check_client_ready(clp);
4858 return ret;
4859}
4860
fc01cea9
AA		 4861/*
4862 * Renew the cl_session lease.
4863 */
4864static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4865{
4866 struct nfs4_sequence_args args;
4867 struct nfs4_sequence_res res;
4868
4869 struct rpc_message msg = {
4870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4871 .rpc_argp = &args,
4872 .rpc_resp = &res,
4873 .rpc_cred = cred,
4874 };
4875
4876 args.sa_cache_this = 0;
4877
4878 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4879 &res, 0);
4880}
4881
4882void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4883{
4884 struct nfs_client *clp = (struct nfs_client *)data;
4885
4886 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4887
4888 if (task->tk_status < 0) {
4889 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4890
4891 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4892 == -EAGAIN) {
e608e79f 4893 nfs4_restart_rpc(task, clp, task->tk_msg.rpc_resp);
fc01cea9
AA		 4894 return;
4895 }
4896 }
4897 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4898 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4899
fc01cea9
AA		 4900 kfree(task->tk_msg.rpc_argp);
4901 kfree(task->tk_msg.rpc_resp);
4902
4903 dprintk("<-- %s\n", __func__);
4904}
4905
4906static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4907{
4908 struct nfs_client *clp;
4909 struct nfs4_sequence_args *args;
4910 struct nfs4_sequence_res *res;
4911
4912 clp = (struct nfs_client *)data;
4913 args = task->tk_msg.rpc_argp;
4914 res = task->tk_msg.rpc_resp;
4915
4916 if (nfs4_setup_sequence(clp, args, res, 0, task))
4917 return;
4918 rpc_call_start(task);
4919}
4920
4921static const struct rpc_call_ops nfs41_sequence_ops = {
4922 .rpc_call_done = nfs41_sequence_call_done,
4923 .rpc_call_prepare = nfs41_sequence_prepare,
4924};
4925
4926static int nfs41_proc_async_sequence(struct nfs_client *clp,
4927 struct rpc_cred *cred)
4928{
4929 struct nfs4_sequence_args *args;
4930 struct nfs4_sequence_res *res;
4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4933 .rpc_cred = cred,
4934 };
4935
4936 args = kzalloc(sizeof(*args), GFP_KERNEL);
4937 if (!args)
4938 return -ENOMEM;
4939 res = kzalloc(sizeof(*res), GFP_KERNEL);
4940 if (!res) {
4941 kfree(args);
4942 return -ENOMEM;
4943 }
4944 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4945 msg.rpc_argp = args;
4946 msg.rpc_resp = res;
4947
4948 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4949 &nfs41_sequence_ops, (void *)clp);
4950}
4951
557134a3
AA		 4952#endif /* CONFIG_NFS_V4_1 */
4953
591d71cb 4954struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4955 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4956 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4957 .recover_open = nfs4_open_reclaim,
4958 .recover_lock = nfs4_lock_reclaim,
591d71cb 4959 .establish_clid = nfs4_init_clientid,
90a16617 4960 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4961};
4962
591d71cb
AA		 4963#if defined(CONFIG_NFS_V4_1)
4964struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4965 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4966 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4967 .recover_open = nfs4_open_reclaim,
4968 .recover_lock = nfs4_lock_reclaim,
4d643d1d 4969 .establish_clid = nfs41_init_clientid,
b4b82607 4970 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4971};
4972#endif /* CONFIG_NFS_V4_1 */
4973
4974struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4975 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4976 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4977 .recover_open = nfs4_open_expired,
4978 .recover_lock = nfs4_lock_expired,
4979 .establish_clid = nfs4_init_clientid,
90a16617 4980 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4981};
4982
4983#if defined(CONFIG_NFS_V4_1)
4984struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4985 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4986 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4987 .recover_open = nfs4_open_expired,
4988 .recover_lock = nfs4_lock_expired,
4d643d1d 4989 .establish_clid = nfs41_init_clientid,
b4b82607 4990 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4991};
591d71cb 4992#endif /* CONFIG_NFS_V4_1 */
1da177e4 4993
29fba38b
BH		 4994struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4995 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4996 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4997 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4998};
4999
5000#if defined(CONFIG_NFS_V4_1)
5001struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5002 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5003 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5004 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5005};
5006#endif
5007
5008/*
5009 * Per minor version reboot and network partition recovery ops
5010 */
5011
591d71cb
AA		 5012struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5013 &nfs40_reboot_recovery_ops,
5014#if defined(CONFIG_NFS_V4_1)
5015 &nfs41_reboot_recovery_ops,
5016#endif
5017};
5018
5019struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5020 &nfs40_nograce_recovery_ops,
5021#if defined(CONFIG_NFS_V4_1)
5022 &nfs41_nograce_recovery_ops,
5023#endif
5024};
5025
29fba38b
BH		 5026struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5027 &nfs40_state_renewal_ops,
5028#if defined(CONFIG_NFS_V4_1)
5029 &nfs41_state_renewal_ops,
5030#endif
5031};
5032
92e1d5be 5033static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5034 .permission = nfs_permission,
5035 .getattr = nfs_getattr,
5036 .setattr = nfs_setattr,
5037 .getxattr = nfs4_getxattr,
5038 .setxattr = nfs4_setxattr,
5039 .listxattr = nfs4_listxattr,
5040};
5041
509de811 5042const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5043 .version = 4, /* protocol version */
5044 .dentry_ops = &nfs4_dentry_operations,
5045 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5046 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5047 .getroot = nfs4_proc_get_root,
5048 .getattr = nfs4_proc_getattr,
5049 .setattr = nfs4_proc_setattr,
2b3de441 5050 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5051 .lookup = nfs4_proc_lookup,
5052 .access = nfs4_proc_access,
5053 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5054 .create = nfs4_proc_create,
5055 .remove = nfs4_proc_remove,
5056 .unlink_setup = nfs4_proc_unlink_setup,
5057 .unlink_done = nfs4_proc_unlink_done,
5058 .rename = nfs4_proc_rename,
5059 .link = nfs4_proc_link,
5060 .symlink = nfs4_proc_symlink,
5061 .mkdir = nfs4_proc_mkdir,
5062 .rmdir = nfs4_proc_remove,
5063 .readdir = nfs4_proc_readdir,
5064 .mknod = nfs4_proc_mknod,
5065 .statfs = nfs4_proc_statfs,
5066 .fsinfo = nfs4_proc_fsinfo,
5067 .pathconf = nfs4_proc_pathconf,
e9326dca 5068 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5069 .decode_dirent = nfs4_decode_dirent,
5070 .read_setup = nfs4_proc_read_setup,
ec06c096 5071 .read_done = nfs4_read_done,
1da177e4 5072 .write_setup = nfs4_proc_write_setup,
788e7a89 5073 .write_done = nfs4_write_done,
1da177e4 5074 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5075 .commit_done = nfs4_commit_done,
1da177e4 5076 .lock = nfs4_proc_lock,
e50a1c2e 5077 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5078 .close_context = nfs4_close_context,
1da177e4
LT		 5079};
5080
5081/*
5082 * Local variables:
5083 * c-basic-offset: 8
5084 * End:
5085 */
Linux 6.x block layer and io_uring tree(s)