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NFS4ERR_FILE_OPEN handling in Linux/NFS
[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);
273 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
274 exception->retry = 1;
275 /* FALLTHROUGH */
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
b069d94a
AA		 439static int nfs4_recover_session(struct nfs4_session *session)
440{
441 struct nfs_client *clp = session->clp;
a78cb57a 442 unsigned int loop;
b069d94a
AA		 443 int ret;
444
a78cb57a 445 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
b069d94a
AA		 446 ret = nfs4_wait_clnt_recover(clp);
447 if (ret != 0)
a78cb57a 448 break;
b069d94a
AA		 449 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
450 break;
451 nfs4_schedule_state_manager(clp);
a78cb57a 452 ret = -EIO;
b069d94a 453 }
a78cb57a 454 return ret;
b069d94a
AA		 455}
456
ce5039c1
AA		 457static int nfs41_setup_sequence(struct nfs4_session *session,
458 struct nfs4_sequence_args *args,
459 struct nfs4_sequence_res *res,
460 int cache_reply,
461 struct rpc_task *task)
462{
fbcd4abc
AA		 463 struct nfs4_slot *slot;
464 struct nfs4_slot_table *tbl;
b069d94a 465 int status = 0;
fbcd4abc
AA		 466 u8 slotid;
467
468 dprintk("--> %s\n", __func__);
ce5039c1
AA		 469 /* slot already allocated? */
470 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
471 return 0;
472
473 memset(res, 0, sizeof(*res));
474 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 475 tbl = &session->fc_slot_table;
476
477 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 478 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
479 if (tbl->highest_used_slotid != -1) {
480 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
481 spin_unlock(&tbl->slot_tbl_lock);
482 dprintk("<-- %s: Session reset: draining\n", __func__);
483 return -EAGAIN;
484 }
485
486 /* The slot table is empty; start the reset thread */
487 dprintk("%s Session Reset\n", __func__);
488 spin_unlock(&tbl->slot_tbl_lock);
489 status = nfs4_recover_session(session);
490 if (status)
491 return status;
492 spin_lock(&tbl->slot_tbl_lock);
493 }
494
fbcd4abc
AA		 495 slotid = nfs4_find_slot(tbl, task);
496 if (slotid == NFS4_MAX_SLOT_TABLE) {
497 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
498 spin_unlock(&tbl->slot_tbl_lock);
499 dprintk("<-- %s: no free slots\n", __func__);
500 return -EAGAIN;
501 }
502 spin_unlock(&tbl->slot_tbl_lock);
503
504 slot = tbl->slots + slotid;
99fe60d0 505 args->sa_session = session;
fbcd4abc
AA		 506 args->sa_slotid = slotid;
507 args->sa_cache_this = cache_reply;
508
509 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
510
99fe60d0 511 res->sr_session = session;
fbcd4abc
AA		 512 res->sr_slotid = slotid;
513 res->sr_renewal_time = jiffies;
514 /*
515 * sr_status is only set in decode_sequence, and so will remain
516 * set to 1 if an rpc level failure occurs.
517 */
518 res->sr_status = 1;
ce5039c1
AA		 519 return 0;
520}
521
522int nfs4_setup_sequence(struct nfs_client *clp,
523 struct nfs4_sequence_args *args,
524 struct nfs4_sequence_res *res,
525 int cache_reply,
526 struct rpc_task *task)
527{
528 int ret = 0;
529
530 dprintk("--> %s clp %p session %p sr_slotid %d\n",
531 __func__, clp, clp->cl_session, res->sr_slotid);
532
533 if (!nfs4_has_session(clp))
534 goto out;
535 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
536 task);
537 if (ret != -EAGAIN) {
538 /* terminate rpc task */
539 task->tk_status = ret;
540 task->tk_action = NULL;
541 }
542out:
543 dprintk("<-- %s status=%d\n", __func__, ret);
544 return ret;
545}
546
547struct nfs41_call_sync_data {
548 struct nfs_client *clp;
549 struct nfs4_sequence_args *seq_args;
550 struct nfs4_sequence_res *seq_res;
551 int cache_reply;
552};
553
554static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
555{
556 struct nfs41_call_sync_data *data = calldata;
557
558 dprintk("--> %s data->clp->cl_session %p\n", __func__,
559 data->clp->cl_session);
560 if (nfs4_setup_sequence(data->clp, data->seq_args,
561 data->seq_res, data->cache_reply, task))
562 return;
563 rpc_call_start(task);
564}
565
69ab40c4
AA		 566static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
567{
568 struct nfs41_call_sync_data *data = calldata;
569
570 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
571 nfs41_sequence_free_slot(data->clp, data->seq_res);
572}
573
ce5039c1
AA		 574struct rpc_call_ops nfs41_call_sync_ops = {
575 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 576 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 577};
578
579static int nfs4_call_sync_sequence(struct nfs_client *clp,
580 struct rpc_clnt *clnt,
581 struct rpc_message *msg,
582 struct nfs4_sequence_args *args,
583 struct nfs4_sequence_res *res,
584 int cache_reply)
585{
586 int ret;
587 struct rpc_task *task;
588 struct nfs41_call_sync_data data = {
589 .clp = clp,
590 .seq_args = args,
591 .seq_res = res,
592 .cache_reply = cache_reply,
593 };
594 struct rpc_task_setup task_setup = {
595 .rpc_client = clnt,
596 .rpc_message = msg,
597 .callback_ops = &nfs41_call_sync_ops,
598 .callback_data = &data
599 };
600
601 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
602 task = rpc_run_task(&task_setup);
603 if (IS_ERR(task))
604 ret = PTR_ERR(task);
605 else {
606 ret = task->tk_status;
607 rpc_put_task(task);
608 }
609 return ret;
610}
611
cccef3b9
AA		 612int _nfs4_call_sync_session(struct nfs_server *server,
613 struct rpc_message *msg,
614 struct nfs4_sequence_args *args,
615 struct nfs4_sequence_res *res,
616 int cache_reply)
617{
ce5039c1
AA		 618 return nfs4_call_sync_sequence(server->nfs_client, server->client,
619 msg, args, res, cache_reply);
cccef3b9
AA		 620}
621
622#endif /* CONFIG_NFS_V4_1 */
623
624int _nfs4_call_sync(struct nfs_server *server,
625 struct rpc_message *msg,
626 struct nfs4_sequence_args *args,
627 struct nfs4_sequence_res *res,
628 int cache_reply)
629{
f3752975 630 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 631 return rpc_call_sync(server->client, msg, 0);
632}
633
634#define nfs4_call_sync(server, msg, args, res, cache_reply) \
635 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
636 &(res)->seq_res, (cache_reply))
637
b0df806c
AA		 638static void nfs4_sequence_done(const struct nfs_server *server,
639 struct nfs4_sequence_res *res, int rpc_status)
640{
641#ifdef CONFIG_NFS_V4_1
642 if (nfs4_has_session(server->nfs_client))
643 nfs41_sequence_done(server->nfs_client, res, rpc_status);
644#endif /* CONFIG_NFS_V4_1 */
645}
646
647/* no restart, therefore free slot here */
648static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
649 struct nfs4_sequence_res *res,
650 int rpc_status)
651{
652 nfs4_sequence_done(server, res, rpc_status);
653 nfs4_sequence_free_slot(server->nfs_client, res);
654}
655
38478b24 656static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 657{
38478b24 658 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 659
38478b24 660 spin_lock(&dir->i_lock);
40d24704
TM		 661 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
662 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 663 nfs_force_lookup_revalidate(dir);
40d24704 664 nfsi->change_attr = cinfo->after;
38478b24 665 spin_unlock(&dir->i_lock);
1da177e4
LT		 666}
667
e56e0b78 668struct nfs4_opendata {
c6d00e63 669 struct kref kref;
e56e0b78
TM		 670 struct nfs_openargs o_arg;
671 struct nfs_openres o_res;
cdd4e68b
TM		 672 struct nfs_open_confirmargs c_arg;
673 struct nfs_open_confirmres c_res;
e56e0b78
TM		 674 struct nfs_fattr f_attr;
675 struct nfs_fattr dir_attr;
ad389da7 676 struct path path;
e56e0b78
TM		 677 struct dentry *dir;
678 struct nfs4_state_owner *owner;
aac00a8d 679 struct nfs4_state *state;
e56e0b78 680 struct iattr attrs;
26e976a8 681 unsigned long timestamp;
3e309914 682 unsigned int rpc_done : 1;
24ac23ab
TM		 683 int rpc_status;
684 int cancelled;
e56e0b78
TM		 685};
686
2ced46c2
TM		 687
688static void nfs4_init_opendata_res(struct nfs4_opendata *p)
689{
690 p->o_res.f_attr = &p->f_attr;
691 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 692 p->o_res.seqid = p->o_arg.seqid;
693 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 694 p->o_res.server = p->o_arg.server;
695 nfs_fattr_init(&p->f_attr);
696 nfs_fattr_init(&p->dir_attr);
578e4585 697 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 698}
699
ad389da7 700static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 701 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 702 const struct iattr *attrs)
703{
ad389da7 704 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 705 struct inode *dir = parent->d_inode;
706 struct nfs_server *server = NFS_SERVER(dir);
707 struct nfs4_opendata *p;
708
709 p = kzalloc(sizeof(*p), GFP_KERNEL);
710 if (p == NULL)
711 goto err;
712 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
713 if (p->o_arg.seqid == NULL)
714 goto err_free;
ad389da7
TM		 715 p->path.mnt = mntget(path->mnt);
716 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 717 p->dir = parent;
718 p->owner = sp;
719 atomic_inc(&sp->so_count);
720 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 721 p->o_arg.open_flags = flags;
722 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 723 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 724 p->o_arg.id = sp->so_owner_id.id;
ad389da7 725 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 726 p->o_arg.server = server;
727 p->o_arg.bitmask = server->attr_bitmask;
728 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 729 if (flags & O_EXCL) {
730 u32 *s = (u32 *) p->o_arg.u.verifier.data;
731 s[0] = jiffies;
732 s[1] = current->pid;
733 } else if (flags & O_CREAT) {
734 p->o_arg.u.attrs = &p->attrs;
735 memcpy(&p->attrs, attrs, sizeof(p->attrs));
736 }
cdd4e68b
TM		 737 p->c_arg.fh = &p->o_res.fh;
738 p->c_arg.stateid = &p->o_res.stateid;
739 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 740 nfs4_init_opendata_res(p);
c6d00e63 741 kref_init(&p->kref);
e56e0b78
TM		 742 return p;
743err_free:
744 kfree(p);
745err:
746 dput(parent);
747 return NULL;
748}
749
c6d00e63 750static void nfs4_opendata_free(struct kref *kref)
e56e0b78 751{
c6d00e63
TM		 752 struct nfs4_opendata *p = container_of(kref,
753 struct nfs4_opendata, kref);
754
755 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 756 if (p->state != NULL)
757 nfs4_put_open_state(p->state);
c6d00e63
TM		 758 nfs4_put_state_owner(p->owner);
759 dput(p->dir);
31f31db1 760 path_put(&p->path);
c6d00e63
TM		 761 kfree(p);
762}
763
764static void nfs4_opendata_put(struct nfs4_opendata *p)
765{
766 if (p != NULL)
767 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 768}
769
06f814a3
TM		 770static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
771{
06f814a3
TM		 772 int ret;
773
06f814a3 774 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 775 return ret;
776}
777
dc0b027d 778static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 779{
780 int ret = 0;
dc0b027d
TM		 781
782 if (open_mode & O_EXCL)
783 goto out;
784 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 785 case FMODE_READ:
786 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 787 break;
788 case FMODE_WRITE:
789 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 790 break;
791 case FMODE_READ|FMODE_WRITE:
792 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
793 }
dc0b027d 794out:
6ee41268
TM		 795 return ret;
796}
797
dc0b027d 798static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 799{
dc0b027d 800 if ((delegation->type & fmode) != fmode)
aac00a8d 801 return 0;
15c831bf 802 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 803 return 0;
b7391f44 804 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 805 return 1;
806}
807
dc0b027d 808static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 809{
dc0b027d 810 switch (fmode) {
e7616923
TM		 811 case FMODE_WRITE:
812 state->n_wronly++;
813 break;
814 case FMODE_READ:
815 state->n_rdonly++;
816 break;
817 case FMODE_READ|FMODE_WRITE:
818 state->n_rdwr++;
819 }
dc0b027d 820 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 821}
822
dc0b027d 823static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 824{
825 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
826 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
827 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 828 switch (fmode) {
003707c7
TM		 829 case FMODE_READ:
830 set_bit(NFS_O_RDONLY_STATE, &state->flags);
831 break;
832 case FMODE_WRITE:
833 set_bit(NFS_O_WRONLY_STATE, &state->flags);
834 break;
835 case FMODE_READ|FMODE_WRITE:
836 set_bit(NFS_O_RDWR_STATE, &state->flags);
837 }
e7616923
TM		 838}
839
dc0b027d 840static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 841{
8bda4e4c 842 write_seqlock(&state->seqlock);
dc0b027d 843 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 844 write_sequnlock(&state->seqlock);
003707c7
TM		 845}
846
dc0b027d 847static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 848{
8bda4e4c
TM		 849 /*
850 * Protect the call to nfs4_state_set_mode_locked and
851 * serialise the stateid update
852 */
853 write_seqlock(&state->seqlock);
003707c7
TM		 854 if (deleg_stateid != NULL) {
855 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
856 set_bit(NFS_DELEGATED_STATE, &state->flags);
857 }
858 if (open_stateid != NULL)
dc0b027d 859 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 860 write_sequnlock(&state->seqlock);
861 spin_lock(&state->owner->so_lock);
dc0b027d 862 update_open_stateflags(state, fmode);
ec073428 863 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 864}
865
dc0b027d 866static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 867{
868 struct nfs_inode *nfsi = NFS_I(state->inode);
869 struct nfs_delegation *deleg_cur;
870 int ret = 0;
871
dc0b027d 872 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 873
874 rcu_read_lock();
875 deleg_cur = rcu_dereference(nfsi->delegation);
876 if (deleg_cur == NULL)
877 goto no_delegation;
878
879 spin_lock(&deleg_cur->lock);
880 if (nfsi->delegation != deleg_cur ||
dc0b027d 881 (deleg_cur->type & fmode) != fmode)
34310430
TM		 882 goto no_delegation_unlock;
883
884 if (delegation == NULL)
885 delegation = &deleg_cur->stateid;
886 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
887 goto no_delegation_unlock;
888
b7391f44 889 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 890 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 891 ret = 1;
892no_delegation_unlock:
893 spin_unlock(&deleg_cur->lock);
894no_delegation:
895 rcu_read_unlock();
896
897 if (!ret && open_stateid != NULL) {
dc0b027d 898 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 899 ret = 1;
900 }
901
902 return ret;
903}
904
905
dc0b027d 906static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 907{
908 struct nfs_delegation *delegation;
909
910 rcu_read_lock();
911 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 912 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 913 rcu_read_unlock();
914 return;
915 }
916 rcu_read_unlock();
917 nfs_inode_return_delegation(inode);
918}
919
6ee41268 920static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 921{
922 struct nfs4_state *state = opendata->state;
923 struct nfs_inode *nfsi = NFS_I(state->inode);
924 struct nfs_delegation *delegation;
dc0b027d
TM		 925 int open_mode = opendata->o_arg.open_flags & O_EXCL;
926 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 927 nfs4_stateid stateid;
928 int ret = -EAGAIN;
929
aac00a8d 930 for (;;) {
dc0b027d 931 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 932 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 933 if (can_open_cached(state, fmode, open_mode)) {
934 update_open_stateflags(state, fmode);
6ee41268 935 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 936 goto out_return_state;
937 }
938 spin_unlock(&state->owner->so_lock);
939 }
34310430
TM		 940 rcu_read_lock();
941 delegation = rcu_dereference(nfsi->delegation);
942 if (delegation == NULL ||
dc0b027d 943 !can_open_delegated(delegation, fmode)) {
34310430 944 rcu_read_unlock();
aac00a8d 945 break;
34310430 946 }
aac00a8d
TM		 947 /* Save the delegation */
948 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
949 rcu_read_unlock();
af22f94a 950 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 951 if (ret != 0)
952 goto out;
953 ret = -EAGAIN;
34310430
TM		 954
955 /* Try to update the stateid using the delegation */
dc0b027d 956 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 957 goto out_return_state;
aac00a8d 958 }
aac00a8d
TM		 959out:
960 return ERR_PTR(ret);
961out_return_state:
962 atomic_inc(&state->count);
963 return state;
964}
965
24ac23ab
TM		 966static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
967{
968 struct inode *inode;
969 struct nfs4_state *state = NULL;
003707c7 970 struct nfs_delegation *delegation;
1b370bc2 971 int ret;
24ac23ab 972
aac00a8d 973 if (!data->rpc_done) {
6ee41268 974 state = nfs4_try_open_cached(data);
aac00a8d
TM		 975 goto out;
976 }
977
1b370bc2 978 ret = -EAGAIN;
24ac23ab 979 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 980 goto err;
24ac23ab 981 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 982 ret = PTR_ERR(inode);
03f28e3a 983 if (IS_ERR(inode))
1b370bc2
TM		 984 goto err;
985 ret = -ENOMEM;
24ac23ab
TM		 986 state = nfs4_get_open_state(inode, data->owner);
987 if (state == NULL)
1b370bc2 988 goto err_put_inode;
549d6ed5 989 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 990 int delegation_flags = 0;
991
003707c7
TM		 992 rcu_read_lock();
993 delegation = rcu_dereference(NFS_I(inode)->delegation);
994 if (delegation)
995 delegation_flags = delegation->flags;
996 rcu_read_unlock();
15c831bf 997 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 998 nfs_inode_set_delegation(state->inode,
999 data->owner->so_cred,
1000 &data->o_res);
1001 else
1002 nfs_inode_reclaim_delegation(state->inode,
1003 data->owner->so_cred,
1004 &data->o_res);
1005 }
34310430
TM		 1006
1007 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1008 data->o_arg.fmode);
24ac23ab 1009 iput(inode);
aac00a8d 1010out:
24ac23ab 1011 return state;
1b370bc2
TM		 1012err_put_inode:
1013 iput(inode);
1014err:
1015 return ERR_PTR(ret);
24ac23ab
TM		 1016}
1017
864472e9
TM		 1018static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1019{
1020 struct nfs_inode *nfsi = NFS_I(state->inode);
1021 struct nfs_open_context *ctx;
1022
1023 spin_lock(&state->inode->i_lock);
1024 list_for_each_entry(ctx, &nfsi->open_files, list) {
1025 if (ctx->state != state)
1026 continue;
1027 get_nfs_open_context(ctx);
1028 spin_unlock(&state->inode->i_lock);
1029 return ctx;
1030 }
1031 spin_unlock(&state->inode->i_lock);
1032 return ERR_PTR(-ENOENT);
1033}
1034
6f220ed5
TM		 1035static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1036{
1037 struct nfs4_opendata *opendata;
1038
dc0b027d 1039 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1040 if (opendata == NULL)
1041 return ERR_PTR(-ENOMEM);
1042 opendata->state = state;
1043 atomic_inc(&state->count);
1044 return opendata;
1045}
1046
dc0b027d 1047static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1048{
2ced46c2 1049 struct nfs4_state *newstate;
864472e9
TM		 1050 int ret;
1051
dc0b027d
TM		 1052 opendata->o_arg.open_flags = 0;
1053 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1054 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1055 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1056 nfs4_init_opendata_res(opendata);
864472e9
TM		 1057 ret = _nfs4_proc_open(opendata);
1058 if (ret != 0)
1059 return ret;
2ced46c2 1060 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1061 if (IS_ERR(newstate))
1062 return PTR_ERR(newstate);
dc0b027d 1063 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1064 *res = newstate;
864472e9
TM		 1065 return 0;
1066}
1067
1068static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1069{
864472e9 1070 struct nfs4_state *newstate;
864472e9
TM		 1071 int ret;
1072
1073 /* memory barrier prior to reading state->n_* */
2ced46c2 1074 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1075 smp_rmb();
1076 if (state->n_rdwr != 0) {
2ced46c2 1077 ret = nfs4_open_recover_helper(opendata, FMODE_READ|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_wronly != 0) {
2ced46c2 1084 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1085 if (ret != 0)
1086 return ret;
2ced46c2
TM		 1087 if (newstate != state)
1088 return -ESTALE;
864472e9
TM		 1089 }
1090 if (state->n_rdonly != 0) {
2ced46c2 1091 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1092 if (ret != 0)
1093 return ret;
2ced46c2
TM		 1094 if (newstate != state)
1095 return -ESTALE;
864472e9 1096 }
1ac7e2fd
TM		 1097 /*
1098 * We may have performed cached opens for all three recoveries.
1099 * Check if we need to update the current stateid.
1100 */
1101 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1102 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1103 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1104 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1105 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1106 write_sequnlock(&state->seqlock);
1ac7e2fd 1107 }
864472e9
TM		 1108 return 0;
1109}
1110
1da177e4
LT		 1111/*
1112 * OPEN_RECLAIM:
1113 * reclaim state on the server after a reboot.
1da177e4 1114 */
539cd03a 1115static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1116{
1ac7e2fd 1117 struct nfs_delegation *delegation;
864472e9 1118 struct nfs4_opendata *opendata;
dc0b027d 1119 fmode_t delegation_type = 0;
1da177e4
LT		 1120 int status;
1121
6f220ed5
TM		 1122 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1123 if (IS_ERR(opendata))
1124 return PTR_ERR(opendata);
864472e9
TM		 1125 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1126 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1127 rcu_read_lock();
1128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1129 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1130 delegation_type = delegation->type;
1ac7e2fd 1131 rcu_read_unlock();
864472e9
TM		 1132 opendata->o_arg.u.delegation_type = delegation_type;
1133 status = nfs4_open_recover(opendata, state);
c6d00e63 1134 nfs4_opendata_put(opendata);
1da177e4
LT		 1135 return status;
1136}
1137
539cd03a 1138static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1139{
1140 struct nfs_server *server = NFS_SERVER(state->inode);
1141 struct nfs4_exception exception = { };
1142 int err;
1143 do {
539cd03a 1144 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1145 if (err != -NFS4ERR_DELAY)
1146 break;
1147 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1148 } while (exception.retry);
1149 return err;
1150}
1151
864472e9
TM		 1152static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1153{
1154 struct nfs_open_context *ctx;
1155 int ret;
1156
1157 ctx = nfs4_state_find_open_context(state);
1158 if (IS_ERR(ctx))
1159 return PTR_ERR(ctx);
539cd03a 1160 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1161 put_nfs_open_context(ctx);
1162 return ret;
1163}
1164
13437e12 1165static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1166{
e56e0b78 1167 struct nfs4_opendata *opendata;
864472e9 1168 int ret;
1da177e4 1169
6f220ed5
TM		 1170 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1171 if (IS_ERR(opendata))
1172 return PTR_ERR(opendata);
e56e0b78 1173 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1174 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1175 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1176 ret = nfs4_open_recover(opendata, state);
c6d00e63 1177 nfs4_opendata_put(opendata);
864472e9 1178 return ret;
1da177e4
LT		 1179}
1180
13437e12 1181int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1182{
1183 struct nfs4_exception exception = { };
539cd03a 1184 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1185 int err;
1186 do {
13437e12 1187 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1188 switch (err) {
1189 case 0:
965b5d67
TM		 1190 case -ENOENT:
1191 case -ESTALE:
1192 goto out;
1da177e4
LT		 1193 case -NFS4ERR_STALE_CLIENTID:
1194 case -NFS4ERR_STALE_STATEID:
1195 case -NFS4ERR_EXPIRED:
1196 /* Don't recall a delegation if it was lost */
7539bbab 1197 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1198 goto out;
1199 case -ERESTARTSYS:
1200 /*
1201 * The show must go on: exit, but mark the
1202 * stateid as needing recovery.
1203 */
1204 case -NFS4ERR_ADMIN_REVOKED:
1205 case -NFS4ERR_BAD_STATEID:
1206 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1207 case -ENOMEM:
1208 err = 0;
1209 goto out;
1da177e4
LT		 1210 }
1211 err = nfs4_handle_exception(server, err, &exception);
1212 } while (exception.retry);
965b5d67 1213out:
1da177e4
LT		 1214 return err;
1215}
1216
cdd4e68b
TM		 1217static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1218{
1219 struct nfs4_opendata *data = calldata;
1220
1221 data->rpc_status = task->tk_status;
1222 if (RPC_ASSASSINATED(task))
1223 return;
26e976a8 1224 if (data->rpc_status == 0) {
cdd4e68b
TM		 1225 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1226 sizeof(data->o_res.stateid.data));
bb22629e 1227 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1228 renew_lease(data->o_res.server, data->timestamp);
3e309914 1229 data->rpc_done = 1;
26e976a8 1230 }
cdd4e68b
TM		 1231}
1232
1233static void nfs4_open_confirm_release(void *calldata)
1234{
1235 struct nfs4_opendata *data = calldata;
1236 struct nfs4_state *state = NULL;
1237
1238 /* If this request hasn't been cancelled, do nothing */
1239 if (data->cancelled == 0)
1240 goto out_free;
1241 /* In case of error, no cleanup! */
3e309914 1242 if (!data->rpc_done)
cdd4e68b 1243 goto out_free;
cdd4e68b 1244 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1245 if (!IS_ERR(state))
dc0b027d 1246 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1247out_free:
c6d00e63 1248 nfs4_opendata_put(data);
cdd4e68b
TM		 1249}
1250
1251static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1252 .rpc_call_done = nfs4_open_confirm_done,
1253 .rpc_release = nfs4_open_confirm_release,
1254};
1255
1256/*
1257 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1258 */
1259static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1260{
1261 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1262 struct rpc_task *task;
5138fde0
TM		 1263 struct rpc_message msg = {
1264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1265 .rpc_argp = &data->c_arg,
1266 .rpc_resp = &data->c_res,
1267 .rpc_cred = data->owner->so_cred,
1268 };
c970aa85
TM		 1269 struct rpc_task_setup task_setup_data = {
1270 .rpc_client = server->client,
5138fde0 1271 .rpc_message = &msg,
c970aa85
TM		 1272 .callback_ops = &nfs4_open_confirm_ops,
1273 .callback_data = data,
101070ca 1274 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1275 .flags = RPC_TASK_ASYNC,
1276 };
1da177e4
LT		 1277 int status;
1278
c6d00e63 1279 kref_get(&data->kref);
3e309914
TM		 1280 data->rpc_done = 0;
1281 data->rpc_status = 0;
5138fde0 1282 data->timestamp = jiffies;
c970aa85 1283 task = rpc_run_task(&task_setup_data);
7a1218a2 1284 if (IS_ERR(task))
cdd4e68b 1285 return PTR_ERR(task);
cdd4e68b
TM		 1286 status = nfs4_wait_for_completion_rpc_task(task);
1287 if (status != 0) {
1288 data->cancelled = 1;
1289 smp_wmb();
1290 } else
1291 status = data->rpc_status;
e6b3c4db 1292 rpc_put_task(task);
1da177e4
LT		 1293 return status;
1294}
1295
24ac23ab 1296static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1297{
24ac23ab
TM		 1298 struct nfs4_opendata *data = calldata;
1299 struct nfs4_state_owner *sp = data->owner;
5138fde0 1300
24ac23ab
TM		 1301 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1302 return;
aac00a8d
TM		 1303 /*
1304 * Check if we still need to send an OPEN call, or if we can use
1305 * a delegation instead.
1306 */
1307 if (data->state != NULL) {
1308 struct nfs_delegation *delegation;
1309
dc0b027d 1310 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1311 goto out_no_action;
aac00a8d
TM		 1312 rcu_read_lock();
1313 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1314 if (delegation != NULL &&
15c831bf 1315 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1316 rcu_read_unlock();
6ee41268 1317 goto out_no_action;
aac00a8d
TM		 1318 }
1319 rcu_read_unlock();
1320 }
24ac23ab 1321 /* Update sequence id. */
9f958ab8 1322 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1323 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1324 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1325 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1326 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1327 }
26e976a8 1328 data->timestamp = jiffies;
d898528c
AA		 1329 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1330 &data->o_arg.seq_args,
1331 &data->o_res.seq_res, 1, task))
1332 return;
5138fde0 1333 rpc_call_start(task);
6ee41268
TM		 1334 return;
1335out_no_action:
1336 task->tk_action = NULL;
1337
24ac23ab 1338}
1da177e4 1339
24ac23ab
TM		 1340static void nfs4_open_done(struct rpc_task *task, void *calldata)
1341{
1342 struct nfs4_opendata *data = calldata;
1da177e4 1343
24ac23ab 1344 data->rpc_status = task->tk_status;
d898528c
AA		 1345
1346 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1347 task->tk_status);
1348
24ac23ab
TM		 1349 if (RPC_ASSASSINATED(task))
1350 return;
1351 if (task->tk_status == 0) {
1352 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1353 case S_IFREG:
1354 break;
1355 case S_IFLNK:
24ac23ab 1356 data->rpc_status = -ELOOP;
6f926b5b
TM		 1357 break;
1358 case S_IFDIR:
24ac23ab 1359 data->rpc_status = -EISDIR;
6f926b5b
TM		 1360 break;
1361 default:
24ac23ab 1362 data->rpc_status = -ENOTDIR;
6f926b5b 1363 }
26e976a8 1364 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1365 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1366 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1367 }
3e309914 1368 data->rpc_done = 1;
24ac23ab 1369}
6f926b5b 1370
24ac23ab
TM		 1371static void nfs4_open_release(void *calldata)
1372{
1373 struct nfs4_opendata *data = calldata;
1374 struct nfs4_state *state = NULL;
1375
1376 /* If this request hasn't been cancelled, do nothing */
1377 if (data->cancelled == 0)
1378 goto out_free;
1379 /* In case of error, no cleanup! */
3e309914 1380 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1381 goto out_free;
1382 /* In case we need an open_confirm, no cleanup! */
1383 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1384 goto out_free;
24ac23ab 1385 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1386 if (!IS_ERR(state))
dc0b027d 1387 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1388out_free:
c6d00e63 1389 nfs4_opendata_put(data);
24ac23ab
TM		 1390}
1391
1392static const struct rpc_call_ops nfs4_open_ops = {
1393 .rpc_call_prepare = nfs4_open_prepare,
1394 .rpc_call_done = nfs4_open_done,
1395 .rpc_release = nfs4_open_release,
1396};
1397
1398/*
1399 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1400 */
1401static int _nfs4_proc_open(struct nfs4_opendata *data)
1402{
1403 struct inode *dir = data->dir->d_inode;
1404 struct nfs_server *server = NFS_SERVER(dir);
1405 struct nfs_openargs *o_arg = &data->o_arg;
1406 struct nfs_openres *o_res = &data->o_res;
1407 struct rpc_task *task;
5138fde0
TM		 1408 struct rpc_message msg = {
1409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1410 .rpc_argp = o_arg,
1411 .rpc_resp = o_res,
1412 .rpc_cred = data->owner->so_cred,
1413 };
c970aa85
TM		 1414 struct rpc_task_setup task_setup_data = {
1415 .rpc_client = server->client,
5138fde0 1416 .rpc_message = &msg,
c970aa85
TM		 1417 .callback_ops = &nfs4_open_ops,
1418 .callback_data = data,
101070ca 1419 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1420 .flags = RPC_TASK_ASYNC,
1421 };
24ac23ab
TM		 1422 int status;
1423
c6d00e63 1424 kref_get(&data->kref);
3e309914
TM		 1425 data->rpc_done = 0;
1426 data->rpc_status = 0;
2ced46c2 1427 data->cancelled = 0;
c970aa85 1428 task = rpc_run_task(&task_setup_data);
7a1218a2 1429 if (IS_ERR(task))
24ac23ab 1430 return PTR_ERR(task);
24ac23ab
TM		 1431 status = nfs4_wait_for_completion_rpc_task(task);
1432 if (status != 0) {
1433 data->cancelled = 1;
1434 smp_wmb();
1435 } else
1436 status = data->rpc_status;
e6b3c4db 1437 rpc_put_task(task);
3e309914 1438 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1439 return status;
1440
9936781d
TM		 1441 if (o_res->fh.size == 0)
1442 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1443
56ae19f3
TM		 1444 if (o_arg->open_flags & O_CREAT) {
1445 update_changeattr(dir, &o_res->cinfo);
1446 nfs_post_op_update_inode(dir, o_res->dir_attr);
1447 } else
1448 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1449 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1450 status = _nfs4_proc_open_confirm(data);
1da177e4 1451 if (status != 0)
24ac23ab 1452 return status;
1da177e4
LT		 1453 }
1454 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1455 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1456 return 0;
1da177e4
LT		 1457}
1458
10afec90 1459static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1460{
7539bbab 1461 struct nfs_client *clp = server->nfs_client;
a78cb57a 1462 unsigned int loop;
6b30954e 1463 int ret;
58d9714a 1464
a78cb57a 1465 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1466 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1467 if (ret != 0)
a78cb57a 1468 break;
e598d843
TM		 1469 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1470 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1471 break;
58d9714a 1472 nfs4_schedule_state_recovery(clp);
a78cb57a 1473 ret = -EIO;
6b30954e 1474 }
a78cb57a 1475 return ret;
58d9714a
TM		 1476}
1477
1da177e4
LT		 1478/*
1479 * OPEN_EXPIRED:
1480 * reclaim state on the server after a network partition.
1481 * Assumes caller holds the appropriate lock
1482 */
539cd03a 1483static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1484{
e56e0b78 1485 struct nfs4_opendata *opendata;
864472e9 1486 int ret;
1da177e4 1487
6f220ed5
TM		 1488 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1489 if (IS_ERR(opendata))
1490 return PTR_ERR(opendata);
864472e9 1491 ret = nfs4_open_recover(opendata, state);
35d05778 1492 if (ret == -ESTALE)
539cd03a 1493 d_drop(ctx->path.dentry);
c6d00e63 1494 nfs4_opendata_put(opendata);
864472e9 1495 return ret;
1da177e4
LT		 1496}
1497
539cd03a 1498static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1499{
539cd03a 1500 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1501 struct nfs4_exception exception = { };
1502 int err;
1503
1504 do {
539cd03a 1505 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1506 if (err != -NFS4ERR_DELAY)
1507 break;
1508 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1509 } while (exception.retry);
1510 return err;
1511}
1512
1da177e4
LT		 1513static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1514{
1da177e4 1515 struct nfs_open_context *ctx;
864472e9 1516 int ret;
1da177e4 1517
864472e9
TM		 1518 ctx = nfs4_state_find_open_context(state);
1519 if (IS_ERR(ctx))
1520 return PTR_ERR(ctx);
539cd03a 1521 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1522 put_nfs_open_context(ctx);
1523 return ret;
1da177e4
LT		 1524}
1525
aa53ed54
JL		 1526/*
1527 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1528 * fields corresponding to attributes that were used to store the verifier.
1529 * Make sure we clobber those fields in the later setattr call
1530 */
1531static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1532{
1533 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1534 !(sattr->ia_valid & ATTR_ATIME_SET))
1535 sattr->ia_valid |= ATTR_ATIME;
1536
1537 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1538 !(sattr->ia_valid & ATTR_MTIME_SET))
1539 sattr->ia_valid |= ATTR_MTIME;
1540}
1541
1da177e4 1542/*
24ac23ab 1543 * Returns a referenced nfs4_state
1da177e4 1544 */
dc0b027d 1545static 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		 1546{
1547 struct nfs4_state_owner *sp;
1548 struct nfs4_state *state = NULL;
1549 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1550 struct nfs4_opendata *opendata;
aac00a8d 1551 int status;
1da177e4
LT		 1552
1553 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1554 status = -ENOMEM;
1555 if (!(sp = nfs4_get_state_owner(server, cred))) {
1556 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1557 goto out_err;
1558 }
58d9714a
TM		 1559 status = nfs4_recover_expired_lease(server);
1560 if (status != 0)
b4454fe1 1561 goto err_put_state_owner;
aac00a8d 1562 if (path->dentry->d_inode != NULL)
dc0b027d 1563 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1564 status = -ENOMEM;
dc0b027d 1565 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1566 if (opendata == NULL)
95d35cb4 1567 goto err_put_state_owner;
1da177e4 1568
aac00a8d
TM		 1569 if (path->dentry->d_inode != NULL)
1570 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1571
24ac23ab 1572 status = _nfs4_proc_open(opendata);
1da177e4 1573 if (status != 0)
c6d00e63 1574 goto err_opendata_put;
1da177e4 1575
aa53ed54
JL		 1576 if (opendata->o_arg.open_flags & O_EXCL)
1577 nfs4_exclusive_attrset(opendata, sattr);
1578
24ac23ab 1579 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1580 status = PTR_ERR(state);
1581 if (IS_ERR(state))
c6d00e63 1582 goto err_opendata_put;
c6d00e63 1583 nfs4_opendata_put(opendata);
1da177e4 1584 nfs4_put_state_owner(sp);
1da177e4
LT		 1585 *res = state;
1586 return 0;
c6d00e63
TM		 1587err_opendata_put:
1588 nfs4_opendata_put(opendata);
e56e0b78
TM		 1589err_put_state_owner:
1590 nfs4_put_state_owner(sp);
1da177e4 1591out_err:
1da177e4
LT		 1592 *res = NULL;
1593 return status;
1594}
1595
1596
dc0b027d 1597static 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		 1598{
1599 struct nfs4_exception exception = { };
1600 struct nfs4_state *res;
1601 int status;
1602
1603 do {
dc0b027d 1604 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1605 if (status == 0)
1606 break;
1607 /* NOTE: BAD_SEQID means the server and client disagree about the
1608 * book-keeping w.r.t. state-changing operations
1609 * (OPEN/CLOSE/LOCK/LOCKU...)
1610 * It is actually a sign of a bug on the client or on the server.
1611 *
1612 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1613 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1614 * have unhashed the old state_owner for us, and that we can
1615 * therefore safely retry using a new one. We should still warn
1616 * the user though...
1617 */
1618 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1619 printk(KERN_WARNING "NFS: v4 server %s "
1620 " returned a bad sequence-id error!\n",
1621 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1622 exception.retry = 1;
1623 continue;
1624 }
550f5747
TM		 1625 /*
1626 * BAD_STATEID on OPEN means that the server cancelled our
1627 * state before it received the OPEN_CONFIRM.
1628 * Recover by retrying the request as per the discussion
1629 * on Page 181 of RFC3530.
1630 */
1631 if (status == -NFS4ERR_BAD_STATEID) {
1632 exception.retry = 1;
1633 continue;
1634 }
aac00a8d
TM		 1635 if (status == -EAGAIN) {
1636 /* We must have found a delegation */
1637 exception.retry = 1;
1638 continue;
1639 }
1da177e4
LT		 1640 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1641 status, &exception));
1642 } while (exception.retry);
1643 return res;
1644}
1645
659bfcd6
TM		 1646static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1647 struct nfs_fattr *fattr, struct iattr *sattr,
1648 struct nfs4_state *state)
1da177e4 1649{
3e4f6290 1650 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1651 struct nfs_setattrargs arg = {
3e4f6290 1652 .fh = NFS_FH(inode),
1da177e4
LT		 1653 .iap = sattr,
1654 .server = server,
1655 .bitmask = server->attr_bitmask,
1656 };
1657 struct nfs_setattrres res = {
1658 .fattr = fattr,
1659 .server = server,
1660 };
1661 struct rpc_message msg = {
659bfcd6
TM		 1662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1663 .rpc_argp = &arg,
1664 .rpc_resp = &res,
1665 .rpc_cred = cred,
1da177e4 1666 };
26e976a8 1667 unsigned long timestamp = jiffies;
65e4308d 1668 int status;
1da177e4 1669
0e574af1 1670 nfs_fattr_init(fattr);
1da177e4 1671
3e4f6290
TM		 1672 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1673 /* Use that stateid */
1674 } else if (state != NULL) {
08e9eac4
TM		 1675 nfs4_copy_stateid(&arg.stateid, state, current->files);
1676 } else
1da177e4
LT		 1677 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1678
cccef3b9 1679 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1680 if (status == 0 && state != NULL)
1681 renew_lease(server, timestamp);
65e4308d 1682 return status;
1da177e4
LT		 1683}
1684
659bfcd6
TM		 1685static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1686 struct nfs_fattr *fattr, struct iattr *sattr,
1687 struct nfs4_state *state)
1da177e4 1688{
3e4f6290 1689 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1690 struct nfs4_exception exception = { };
1691 int err;
1692 do {
1693 err = nfs4_handle_exception(server,
659bfcd6 1694 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1695 &exception);
1696 } while (exception.retry);
1697 return err;
1698}
1699
1700struct nfs4_closedata {
4a35bd41 1701 struct path path;
1da177e4
LT		 1702 struct inode *inode;
1703 struct nfs4_state *state;
1704 struct nfs_closeargs arg;
1705 struct nfs_closeres res;
516a6af6 1706 struct nfs_fattr fattr;
26e976a8 1707 unsigned long timestamp;
1da177e4
LT		 1708};
1709
963d8fe5 1710static void nfs4_free_closedata(void *data)
9512135d 1711{
963d8fe5
TM		 1712 struct nfs4_closedata *calldata = data;
1713 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1714
1715 nfs4_put_open_state(calldata->state);
1716 nfs_free_seqid(calldata->arg.seqid);
9512135d 1717 nfs4_put_state_owner(sp);
31f31db1 1718 path_put(&calldata->path);
9512135d
TM		 1719 kfree(calldata);
1720}
1721
963d8fe5 1722static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1723{
963d8fe5 1724 struct nfs4_closedata *calldata = data;
1da177e4 1725 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1726 struct nfs_server *server = NFS_SERVER(calldata->inode);
1727
19ddab06 1728 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1729 if (RPC_ASSASSINATED(task))
1730 return;
1da177e4
LT		 1731 /* hmm. we are done with the inode, and in the process of freeing
1732 * the state_owner. we keep this around to process errors
1733 */
1da177e4
LT		 1734 switch (task->tk_status) {
1735 case 0:
45328c35 1736 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1737 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1738 break;
1739 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1740 case -NFS4ERR_OLD_STATEID:
1741 case -NFS4ERR_BAD_STATEID:
1da177e4 1742 case -NFS4ERR_EXPIRED:
dc0b027d 1743 if (calldata->arg.fmode == 0)
9e33bed5 1744 break;
1da177e4 1745 default:
9e33bed5 1746 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1747 nfs4_restart_rpc(task, server->nfs_client);
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
7fe5c398
TM		 1991void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
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) {
eedc020e 2985 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2986 return -EAGAIN;
1da177e4 2987 }
8850df99
TM		 2988
2989 nfs_invalidate_atime(data->inode);
1da177e4 2990 if (task->tk_status > 0)
ec06c096
TM		 2991 renew_lease(server, data->timestamp);
2992 return 0;
1da177e4
LT		 2993}
2994
bdc7f021 2995static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2996{
1da177e4 2997 data->timestamp = jiffies;
bdc7f021 2998 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2999}
3000
788e7a89 3001static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3002{
1da177e4
LT		 3003 struct inode *inode = data->inode;
3004
def6ed7e
AA		 3005 /* slot is freed in nfs_writeback_done */
3006 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3007 task->tk_status);
3008
9e33bed5 3009 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 3010 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3011 return -EAGAIN;
1da177e4 3012 }
4f9838c7 3013 if (task->tk_status >= 0) {
1da177e4 3014 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3015 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3016 }
788e7a89 3017 return 0;
1da177e4
LT		 3018}
3019
bdc7f021 3020static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3021{
bdc7f021
TM		 3022 struct nfs_server *server = NFS_SERVER(data->inode);
3023
a65318bf 3024 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3025 data->res.server = server;
1da177e4
LT		 3026 data->timestamp = jiffies;
3027
bdc7f021 3028 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3029}
3030
788e7a89 3031static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3032{
1da177e4
LT		 3033 struct inode *inode = data->inode;
3034
21d9a851
AA		 3035 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3036 task->tk_status);
9e33bed5 3037 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3038 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3039 return -EAGAIN;
1da177e4 3040 }
21d9a851
AA		 3041 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3042 &data->res.seq_res);
9e08a3c5 3043 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3044 return 0;
1da177e4
LT		 3045}
3046
bdc7f021 3047static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3048{
788e7a89 3049 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3050
a65318bf 3051 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3052 data->res.server = server;
bdc7f021 3053 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3054}
3055
3056/*
3057 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3058 * standalone procedure for queueing an asynchronous RENEW.
3059 */
963d8fe5 3060static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3061{
adfa6f98 3062 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3063 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3064
3065 if (task->tk_status < 0) {
95baa25c
TM		 3066 /* Unless we're shutting down, schedule state recovery! */
3067 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3068 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3069 return;
3070 }
3071 spin_lock(&clp->cl_lock);
3072 if (time_before(clp->cl_last_renewal,timestamp))
3073 clp->cl_last_renewal = timestamp;
3074 spin_unlock(&clp->cl_lock);
3075}
3076
963d8fe5
TM		 3077static const struct rpc_call_ops nfs4_renew_ops = {
3078 .rpc_call_done = nfs4_renew_done,
3079};
3080
adfa6f98 3081int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3082{
3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3085 .rpc_argp = clp,
b4454fe1 3086 .rpc_cred = cred,
1da177e4
LT		 3087 };
3088
3089 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3090 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3091}
3092
adfa6f98 3093int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3094{
3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3097 .rpc_argp = clp,
b4454fe1 3098 .rpc_cred = cred,
1da177e4
LT		 3099 };
3100 unsigned long now = jiffies;
3101 int status;
3102
3103 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3104 if (status < 0)
3105 return status;
3106 spin_lock(&clp->cl_lock);
3107 if (time_before(clp->cl_last_renewal,now))
3108 clp->cl_last_renewal = now;
3109 spin_unlock(&clp->cl_lock);
3110 return 0;
3111}
3112
aa1870af
BF		 3113static inline int nfs4_server_supports_acls(struct nfs_server *server)
3114{
3115 return (server->caps & NFS_CAP_ACLS)
3116 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3117 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3118}
3119
3120/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3121 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3122 * the stack.
3123 */
3124#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3125
3126static void buf_to_pages(const void *buf, size_t buflen,
3127 struct page **pages, unsigned int *pgbase)
3128{
3129 const void *p = buf;
3130
3131 *pgbase = offset_in_page(buf);
3132 p -= *pgbase;
3133 while (p < buf + buflen) {
3134 *(pages++) = virt_to_page(p);
3135 p += PAGE_CACHE_SIZE;
3136 }
3137}
3138
e50a1c2e
BF		 3139struct nfs4_cached_acl {
3140 int cached;
3141 size_t len;
3e9d4154 3142 char data[0];
e50a1c2e
BF		 3143};
3144
3145static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3146{
3147 struct nfs_inode *nfsi = NFS_I(inode);
3148
3149 spin_lock(&inode->i_lock);
3150 kfree(nfsi->nfs4_acl);
3151 nfsi->nfs4_acl = acl;
3152 spin_unlock(&inode->i_lock);
3153}
3154
3155static void nfs4_zap_acl_attr(struct inode *inode)
3156{
3157 nfs4_set_cached_acl(inode, NULL);
3158}
3159
3160static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3161{
3162 struct nfs_inode *nfsi = NFS_I(inode);
3163 struct nfs4_cached_acl *acl;
3164 int ret = -ENOENT;
3165
3166 spin_lock(&inode->i_lock);
3167 acl = nfsi->nfs4_acl;
3168 if (acl == NULL)
3169 goto out;
3170 if (buf == NULL) /* user is just asking for length */
3171 goto out_len;
3172 if (acl->cached == 0)
3173 goto out;
3174 ret = -ERANGE; /* see getxattr(2) man page */
3175 if (acl->len > buflen)
3176 goto out;
3177 memcpy(buf, acl->data, acl->len);
3178out_len:
3179 ret = acl->len;
3180out:
3181 spin_unlock(&inode->i_lock);
3182 return ret;
3183}
3184
3185static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3186{
3187 struct nfs4_cached_acl *acl;
3188
3189 if (buf && acl_len <= PAGE_SIZE) {
3190 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3191 if (acl == NULL)
3192 goto out;
3193 acl->cached = 1;
3194 memcpy(acl->data, buf, acl_len);
3195 } else {
3196 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3197 if (acl == NULL)
3198 goto out;
3199 acl->cached = 0;
3200 }
3201 acl->len = acl_len;
3202out:
3203 nfs4_set_cached_acl(inode, acl);
3204}
3205
16b4289c 3206static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3207{
aa1870af
BF		 3208 struct page *pages[NFS4ACL_MAXPAGES];
3209 struct nfs_getaclargs args = {
3210 .fh = NFS_FH(inode),
3211 .acl_pages = pages,
3212 .acl_len = buflen,
3213 };
663c79b3
BH		 3214 struct nfs_getaclres res = {
3215 .acl_len = buflen,
3216 };
e50a1c2e 3217 void *resp_buf;
aa1870af
BF		 3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3220 .rpc_argp = &args,
663c79b3 3221 .rpc_resp = &res,
aa1870af 3222 };
e50a1c2e 3223 struct page *localpage = NULL;
aa1870af
BF		 3224 int ret;
3225
e50a1c2e
BF		 3226 if (buflen < PAGE_SIZE) {
3227 /* As long as we're doing a round trip to the server anyway,
3228 * let's be prepared for a page of acl data. */
3229 localpage = alloc_page(GFP_KERNEL);
3230 resp_buf = page_address(localpage);
3231 if (localpage == NULL)
3232 return -ENOMEM;
3233 args.acl_pages[0] = localpage;
3234 args.acl_pgbase = 0;
663c79b3 3235 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3236 } else {
3237 resp_buf = buf;
3238 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3239 }
cccef3b9 3240 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3241 if (ret)
3242 goto out_free;
663c79b3
BH		 3243 if (res.acl_len > args.acl_len)
3244 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3245 else
663c79b3 3246 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3247 if (buf) {
3248 ret = -ERANGE;
663c79b3 3249 if (res.acl_len > buflen)
e50a1c2e
BF		 3250 goto out_free;
3251 if (localpage)
663c79b3 3252 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3253 }
663c79b3 3254 ret = res.acl_len;
e50a1c2e
BF		 3255out_free:
3256 if (localpage)
3257 __free_page(localpage);
aa1870af
BF		 3258 return ret;
3259}
3260
16b4289c
TM		 3261static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3262{
3263 struct nfs4_exception exception = { };
3264 ssize_t ret;
3265 do {
3266 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3267 if (ret >= 0)
3268 break;
3269 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3270 } while (exception.retry);
3271 return ret;
3272}
3273
e50a1c2e
BF		 3274static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3275{
3276 struct nfs_server *server = NFS_SERVER(inode);
3277 int ret;
3278
3279 if (!nfs4_server_supports_acls(server))
3280 return -EOPNOTSUPP;
3281 ret = nfs_revalidate_inode(server, inode);
3282 if (ret < 0)
3283 return ret;
3284 ret = nfs4_read_cached_acl(inode, buf, buflen);
3285 if (ret != -ENOENT)
3286 return ret;
3287 return nfs4_get_acl_uncached(inode, buf, buflen);
3288}
3289
16b4289c 3290static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3291{
3292 struct nfs_server *server = NFS_SERVER(inode);
3293 struct page *pages[NFS4ACL_MAXPAGES];
3294 struct nfs_setaclargs arg = {
3295 .fh = NFS_FH(inode),
3296 .acl_pages = pages,
3297 .acl_len = buflen,
3298 };
73c403a9 3299 struct nfs_setaclres res;
4b580ee3
BF		 3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3302 .rpc_argp = &arg,
73c403a9 3303 .rpc_resp = &res,
4b580ee3
BF		 3304 };
3305 int ret;
3306
3307 if (!nfs4_server_supports_acls(server))
3308 return -EOPNOTSUPP;
642ac549 3309 nfs_inode_return_delegation(inode);
4b580ee3 3310 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3311 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3312 nfs_access_zap_cache(inode);
3313 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3314 return ret;
3315}
3316
16b4289c
TM		 3317static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3318{
3319 struct nfs4_exception exception = { };
3320 int err;
3321 do {
3322 err = nfs4_handle_exception(NFS_SERVER(inode),
3323 __nfs4_proc_set_acl(inode, buf, buflen),
3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327}
3328
1da177e4 3329static int
8328d59f 3330_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3331{
1da177e4
LT		 3332 if (!clp || task->tk_status >= 0)
3333 return 0;
3334 switch(task->tk_status) {
9e33bed5
TM		 3335 case -NFS4ERR_ADMIN_REVOKED:
3336 case -NFS4ERR_BAD_STATEID:
3337 case -NFS4ERR_OPENMODE:
3338 if (state == NULL)
3339 break;
3340 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3341 case -NFS4ERR_STALE_CLIENTID:
3342 case -NFS4ERR_STALE_STATEID:
3343 case -NFS4ERR_EXPIRED:
5d00837b 3344 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3345 nfs4_schedule_state_recovery(clp);
e005e804 3346 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3347 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3348 task->tk_status = 0;
3349 return -EAGAIN;
4745e315
AA		 3350#if defined(CONFIG_NFS_V4_1)
3351 case -NFS4ERR_BADSESSION:
3352 case -NFS4ERR_BADSLOT:
3353 case -NFS4ERR_BAD_HIGH_SLOT:
3354 case -NFS4ERR_DEADSESSION:
3355 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3356 case -NFS4ERR_SEQ_FALSE_RETRY:
3357 case -NFS4ERR_SEQ_MISORDERED:
3358 dprintk("%s ERROR %d, Reset session\n", __func__,
3359 task->tk_status);
3360 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3361 task->tk_status = 0;
3362 return -EAGAIN;
3363#endif /* CONFIG_NFS_V4_1 */
1da177e4 3364 case -NFS4ERR_DELAY:
8328d59f
AA		 3365 if (server)
3366 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3367 case -NFS4ERR_GRACE:
1da177e4
LT		 3368 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3369 task->tk_status = 0;
3370 return -EAGAIN;
3371 case -NFS4ERR_OLD_STATEID:
3372 task->tk_status = 0;
3373 return -EAGAIN;
3374 }
3375 task->tk_status = nfs4_map_errors(task->tk_status);
3376 return 0;
3377}
3378
8328d59f
AA		 3379static int
3380nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3381{
3382 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3383}
3384
adfa6f98 3385int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3386{
3387 nfs4_verifier sc_verifier;
3388 struct nfs4_setclientid setclientid = {
3389 .sc_verifier = &sc_verifier,
3390 .sc_prog = program,
3391 };
3392 struct rpc_message msg = {
3393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3394 .rpc_argp = &setclientid,
3395 .rpc_resp = clp,
286d7d6a 3396 .rpc_cred = cred,
1da177e4 3397 };
bc4785cd 3398 __be32 *p;
1da177e4
LT		 3399 int loop = 0;
3400 int status;
3401
bc4785cd 3402 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3403 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3404 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3405
3406 for(;;) {
3407 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3408 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3409 clp->cl_ipaddr,
3410 rpc_peeraddr2str(clp->cl_rpcclient,
3411 RPC_DISPLAY_ADDR),
69dd716c
TM		 3412 rpc_peeraddr2str(clp->cl_rpcclient,
3413 RPC_DISPLAY_PROTO),
78ea323b 3414 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3415 clp->cl_id_uniquifier);
3416 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3417 sizeof(setclientid.sc_netid),
3418 rpc_peeraddr2str(clp->cl_rpcclient,
3419 RPC_DISPLAY_NETID));
1da177e4 3420 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3421 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3422 clp->cl_ipaddr, port >> 8, port & 255);
3423
3424 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3425 if (status != -NFS4ERR_CLID_INUSE)
3426 break;
3427 if (signalled())
3428 break;
3429 if (loop++ & 1)
3430 ssleep(clp->cl_lease_time + 1);
3431 else
3432 if (++clp->cl_id_uniquifier == 0)
3433 break;
3434 }
3435 return status;
3436}
3437
adfa6f98 3438static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3439{
3440 struct nfs_fsinfo fsinfo;
3441 struct rpc_message msg = {
3442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3443 .rpc_argp = clp,
3444 .rpc_resp = &fsinfo,
286d7d6a 3445 .rpc_cred = cred,
1da177e4
LT		 3446 };
3447 unsigned long now;
3448 int status;
3449
3450 now = jiffies;
3451 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3452 if (status == 0) {
3453 spin_lock(&clp->cl_lock);
3454 clp->cl_lease_time = fsinfo.lease_time * HZ;
3455 clp->cl_last_renewal = now;
3456 spin_unlock(&clp->cl_lock);
3457 }
3458 return status;
3459}
3460
adfa6f98 3461int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3462{
77e03677 3463 long timeout = 0;
51581f3b
TM		 3464 int err;
3465 do {
3466 err = _nfs4_proc_setclientid_confirm(clp, cred);
3467 switch (err) {
3468 case 0:
3469 return err;
3470 case -NFS4ERR_RESOURCE:
3471 /* The IBM lawyers misread another document! */
3472 case -NFS4ERR_DELAY:
3473 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3474 }
3475 } while (err == 0);
3476 return err;
3477}
3478
fe650407
TM		 3479struct nfs4_delegreturndata {
3480 struct nfs4_delegreturnargs args;
fa178f29 3481 struct nfs4_delegreturnres res;
fe650407
TM		 3482 struct nfs_fh fh;
3483 nfs4_stateid stateid;
26e976a8 3484 unsigned long timestamp;
fa178f29 3485 struct nfs_fattr fattr;
fe650407
TM		 3486 int rpc_status;
3487};
3488
fe650407
TM		 3489static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3490{
3491 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3492
3493 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3494 task->tk_status);
3495
fe650407 3496 data->rpc_status = task->tk_status;
26e976a8 3497 if (data->rpc_status == 0)
fa178f29 3498 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3499}
3500
3501static void nfs4_delegreturn_release(void *calldata)
3502{
fe650407
TM		 3503 kfree(calldata);
3504}
3505
938e1010
AA		 3506#if defined(CONFIG_NFS_V4_1)
3507static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3508{
3509 struct nfs4_delegreturndata *d_data;
3510
3511 d_data = (struct nfs4_delegreturndata *)data;
3512
3513 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3514 &d_data->args.seq_args,
3515 &d_data->res.seq_res, 1, task))
3516 return;
3517 rpc_call_start(task);
3518}
3519#endif /* CONFIG_NFS_V4_1 */
3520
c8d149f3 3521static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3522#if defined(CONFIG_NFS_V4_1)
3523 .rpc_call_prepare = nfs4_delegreturn_prepare,
3524#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3525 .rpc_call_done = nfs4_delegreturn_done,
3526 .rpc_release = nfs4_delegreturn_release,
3527};
3528
e6f81075 3529static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3530{
3531 struct nfs4_delegreturndata *data;
fa178f29 3532 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3533 struct rpc_task *task;
5138fde0
TM		 3534 struct rpc_message msg = {
3535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3536 .rpc_cred = cred,
3537 };
c970aa85
TM		 3538 struct rpc_task_setup task_setup_data = {
3539 .rpc_client = server->client,
5138fde0 3540 .rpc_message = &msg,
c970aa85
TM		 3541 .callback_ops = &nfs4_delegreturn_ops,
3542 .flags = RPC_TASK_ASYNC,
3543 };
e6f81075 3544 int status = 0;
fe650407 3545
938e1010 3546 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3547 if (data == NULL)
3548 return -ENOMEM;
3549 data->args.fhandle = &data->fh;
3550 data->args.stateid = &data->stateid;
fa178f29 3551 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3552 nfs_copy_fh(&data->fh, NFS_FH(inode));
3553 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3554 data->res.fattr = &data->fattr;
3555 data->res.server = server;
5f7dbd5c 3556 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3557 nfs_fattr_init(data->res.fattr);
26e976a8 3558 data->timestamp = jiffies;
fe650407
TM		 3559 data->rpc_status = 0;
3560
c970aa85 3561 task_setup_data.callback_data = data;
5138fde0
TM		 3562 msg.rpc_argp = &data->args,
3563 msg.rpc_resp = &data->res,
c970aa85 3564 task = rpc_run_task(&task_setup_data);
7a1218a2 3565 if (IS_ERR(task))
fe650407 3566 return PTR_ERR(task);
e6f81075
TM		 3567 if (!issync)
3568 goto out;
fe650407 3569 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3570 if (status != 0)
3571 goto out;
3572 status = data->rpc_status;
3573 if (status != 0)
3574 goto out;
3575 nfs_refresh_inode(inode, &data->fattr);
3576out:
e6b3c4db 3577 rpc_put_task(task);
fe650407 3578 return status;
1da177e4
LT		 3579}
3580
e6f81075 3581int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3582{
3583 struct nfs_server *server = NFS_SERVER(inode);
3584 struct nfs4_exception exception = { };
3585 int err;
3586 do {
e6f81075 3587 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3588 switch (err) {
3589 case -NFS4ERR_STALE_STATEID:
3590 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3591 case 0:
3592 return 0;
3593 }
3594 err = nfs4_handle_exception(server, err, &exception);
3595 } while (exception.retry);
3596 return err;
3597}
3598
3599#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3600#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3601
3602/*
3603 * sleep, with exponential backoff, and retry the LOCK operation.
3604 */
3605static unsigned long
3606nfs4_set_lock_task_retry(unsigned long timeout)
3607{
150030b7 3608 schedule_timeout_killable(timeout);
1da177e4
LT		 3609 timeout <<= 1;
3610 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3611 return NFS4_LOCK_MAXTIMEOUT;
3612 return timeout;
3613}
3614
1da177e4
LT		 3615static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3616{
3617 struct inode *inode = state->inode;
3618 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3619 struct nfs_client *clp = server->nfs_client;
911d1aaf 3620 struct nfs_lockt_args arg = {
1da177e4 3621 .fh = NFS_FH(inode),
911d1aaf 3622 .fl = request,
1da177e4 3623 };
911d1aaf
TM		 3624 struct nfs_lockt_res res = {
3625 .denied = request,
1da177e4
LT		 3626 };
3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3629 .rpc_argp = &arg,
3630 .rpc_resp = &res,
3631 .rpc_cred = state->owner->so_cred,
3632 };
1da177e4
LT		 3633 struct nfs4_lock_state *lsp;
3634 int status;
3635
911d1aaf 3636 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3637 status = nfs4_set_lock_state(state, request);
3638 if (status != 0)
3639 goto out;
3640 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3641 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3642 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3643 switch (status) {
3644 case 0:
3645 request->fl_type = F_UNLCK;
3646 break;
3647 case -NFS4ERR_DENIED:
3648 status = 0;
1da177e4 3649 }
70cc6487 3650 request->fl_ops->fl_release_private(request);
8d0a8a9d 3651out:
1da177e4
LT		 3652 return status;
3653}
3654
3655static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3656{
3657 struct nfs4_exception exception = { };
3658 int err;
3659
3660 do {
3661 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3662 _nfs4_proc_getlk(state, cmd, request),
3663 &exception);
3664 } while (exception.retry);
3665 return err;
3666}
3667
3668static int do_vfs_lock(struct file *file, struct file_lock *fl)
3669{
3670 int res = 0;
3671 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3672 case FL_POSIX:
3673 res = posix_lock_file_wait(file, fl);
3674 break;
3675 case FL_FLOCK:
3676 res = flock_lock_file_wait(file, fl);
3677 break;
3678 default:
3679 BUG();
3680 }
1da177e4
LT		 3681 return res;
3682}
3683
faf5f49c 3684struct nfs4_unlockdata {
911d1aaf
TM		 3685 struct nfs_locku_args arg;
3686 struct nfs_locku_res res;
faf5f49c
TM		 3687 struct nfs4_lock_state *lsp;
3688 struct nfs_open_context *ctx;
911d1aaf
TM		 3689 struct file_lock fl;
3690 const struct nfs_server *server;
26e976a8 3691 unsigned long timestamp;
faf5f49c
TM		 3692};
3693
911d1aaf
TM		 3694static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3695 struct nfs_open_context *ctx,
3696 struct nfs4_lock_state *lsp,
3697 struct nfs_seqid *seqid)
3698{
3699 struct nfs4_unlockdata *p;
3700 struct inode *inode = lsp->ls_state->inode;
3701
a893693c 3702 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3703 if (p == NULL)
3704 return NULL;
3705 p->arg.fh = NFS_FH(inode);
3706 p->arg.fl = &p->fl;
3707 p->arg.seqid = seqid;
c1d51931 3708 p->res.seqid = seqid;
5f7dbd5c 3709 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3710 p->arg.stateid = &lsp->ls_stateid;
3711 p->lsp = lsp;
3712 atomic_inc(&lsp->ls_count);
3713 /* Ensure we don't close file until we're done freeing locks! */
3714 p->ctx = get_nfs_open_context(ctx);
3715 memcpy(&p->fl, fl, sizeof(p->fl));
3716 p->server = NFS_SERVER(inode);
3717 return p;
3718}
3719
06f814a3 3720static void nfs4_locku_release_calldata(void *data)
faf5f49c 3721{
963d8fe5 3722 struct nfs4_unlockdata *calldata = data;
911d1aaf 3723 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3724 nfs4_put_lock_state(calldata->lsp);
3725 put_nfs_open_context(calldata->ctx);
3726 kfree(calldata);
faf5f49c
TM		 3727}
3728
963d8fe5 3729static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3730{
963d8fe5 3731 struct nfs4_unlockdata *calldata = data;
faf5f49c 3732
a893693c
AA		 3733 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3734 task->tk_status);
06f814a3
TM		 3735 if (RPC_ASSASSINATED(task))
3736 return;
faf5f49c
TM		 3737 switch (task->tk_status) {
3738 case 0:
3739 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3740 calldata->res.stateid.data,
faf5f49c 3741 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3742 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3743 break;
9e33bed5
TM		 3744 case -NFS4ERR_BAD_STATEID:
3745 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3746 case -NFS4ERR_STALE_STATEID:
3747 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3748 break;
3749 default:
9e33bed5 3750 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3751 nfs4_restart_rpc(task,
3752 calldata->server->nfs_client);
faf5f49c 3753 }
a893693c
AA		 3754 nfs4_sequence_free_slot(calldata->server->nfs_client,
3755 &calldata->res.seq_res);
faf5f49c
TM		 3756}
3757
4ce70ada 3758static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3759{
4ce70ada 3760 struct nfs4_unlockdata *calldata = data;
faf5f49c 3761
911d1aaf 3762 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3763 return;
3764 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3765 /* Note: exit _without_ running nfs4_locku_done */
3766 task->tk_action = NULL;
faf5f49c
TM		 3767 return;
3768 }
26e976a8 3769 calldata->timestamp = jiffies;
a893693c
AA		 3770 if (nfs4_setup_sequence(calldata->server->nfs_client,
3771 &calldata->arg.seq_args,
3772 &calldata->res.seq_res, 1, task))
3773 return;
5138fde0 3774 rpc_call_start(task);
faf5f49c
TM		 3775}
3776
963d8fe5 3777static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3778 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3779 .rpc_call_done = nfs4_locku_done,
06f814a3 3780 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3781};
3782
a5d16a4d
TM		 3783static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3784 struct nfs_open_context *ctx,
3785 struct nfs4_lock_state *lsp,
3786 struct nfs_seqid *seqid)
3787{
3788 struct nfs4_unlockdata *data;
5138fde0
TM		 3789 struct rpc_message msg = {
3790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3791 .rpc_cred = ctx->cred,
3792 };
c970aa85
TM		 3793 struct rpc_task_setup task_setup_data = {
3794 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3795 .rpc_message = &msg,
c970aa85 3796 .callback_ops = &nfs4_locku_ops,
101070ca 3797 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3798 .flags = RPC_TASK_ASYNC,
3799 };
a5d16a4d 3800
137d6aca
FF		 3801 /* Ensure this is an unlock - when canceling a lock, the
3802 * canceled lock is passed in, and it won't be an unlock.
3803 */
3804 fl->fl_type = F_UNLCK;
3805
a5d16a4d
TM		 3806 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3807 if (data == NULL) {
3808 nfs_free_seqid(seqid);
3809 return ERR_PTR(-ENOMEM);
3810 }
3811
5138fde0
TM		 3812 msg.rpc_argp = &data->arg,
3813 msg.rpc_resp = &data->res,
c970aa85
TM		 3814 task_setup_data.callback_data = data;
3815 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3816}
3817
faf5f49c
TM		 3818static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3819{
19e03c57 3820 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3821 struct nfs_seqid *seqid;
1da177e4 3822 struct nfs4_lock_state *lsp;
06f814a3
TM		 3823 struct rpc_task *task;
3824 int status = 0;
536ff0f8 3825 unsigned char fl_flags = request->fl_flags;
faf5f49c 3826
8d0a8a9d 3827 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3828 /* Unlock _before_ we do the RPC call */
3829 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3830 down_read(&nfsi->rwsem);
3831 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3832 up_read(&nfsi->rwsem);
9b073574 3833 goto out;
19e03c57
TM		 3834 }
3835 up_read(&nfsi->rwsem);
8d0a8a9d 3836 if (status != 0)
9b073574
TM		 3837 goto out;
3838 /* Is this a delegated lock? */
3839 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3840 goto out;
8d0a8a9d 3841 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3842 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3843 status = -ENOMEM;
911d1aaf 3844 if (seqid == NULL)
9b073574 3845 goto out;
cd3758e3 3846 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3847 status = PTR_ERR(task);
3848 if (IS_ERR(task))
9b073574 3849 goto out;
a5d16a4d 3850 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3851 rpc_put_task(task);
9b073574 3852out:
536ff0f8 3853 request->fl_flags = fl_flags;
1da177e4
LT		 3854 return status;
3855}
3856
a5d16a4d
TM		 3857struct nfs4_lockdata {
3858 struct nfs_lock_args arg;
3859 struct nfs_lock_res res;
3860 struct nfs4_lock_state *lsp;
3861 struct nfs_open_context *ctx;
3862 struct file_lock fl;
26e976a8 3863 unsigned long timestamp;
a5d16a4d
TM		 3864 int rpc_status;
3865 int cancelled;
66179efe 3866 struct nfs_server *server;
a5d16a4d
TM		 3867};
3868
3869static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3870 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3871{
a5d16a4d
TM		 3872 struct nfs4_lockdata *p;
3873 struct inode *inode = lsp->ls_state->inode;
1da177e4 3874 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3875
3876 p = kzalloc(sizeof(*p), GFP_KERNEL);
3877 if (p == NULL)
3878 return NULL;
3879
3880 p->arg.fh = NFS_FH(inode);
3881 p->arg.fl = &p->fl;
2f74c0a0
TM		 3882 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3883 if (p->arg.open_seqid == NULL)
3884 goto out_free;
a5d16a4d
TM		 3885 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3886 if (p->arg.lock_seqid == NULL)
2f74c0a0 3887 goto out_free_seqid;
a5d16a4d 3888 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3889 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3890 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3891 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3892 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3893 p->lsp = lsp;
66179efe 3894 p->server = server;
a5d16a4d
TM		 3895 atomic_inc(&lsp->ls_count);
3896 p->ctx = get_nfs_open_context(ctx);
3897 memcpy(&p->fl, fl, sizeof(p->fl));
3898 return p;
2f74c0a0
TM		 3899out_free_seqid:
3900 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3901out_free:
3902 kfree(p);
3903 return NULL;
3904}
3905
3906static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3907{
3908 struct nfs4_lockdata *data = calldata;
3909 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3910
3110ff80 3911 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3912 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3913 return;
a5d16a4d
TM		 3914 /* Do we need to do an open_to_lock_owner? */
3915 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3916 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3917 return;
a5d16a4d
TM		 3918 data->arg.open_stateid = &state->stateid;
3919 data->arg.new_lock_owner = 1;
c1d51931 3920 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3921 } else
3922 data->arg.new_lock_owner = 0;
26e976a8 3923 data->timestamp = jiffies;
66179efe
AA		 3924 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3925 &data->res.seq_res, 1, task))
3926 return;
5138fde0 3927 rpc_call_start(task);
3110ff80 3928 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3929}
3930
3931static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3932{
3933 struct nfs4_lockdata *data = calldata;
3934
3110ff80 3935 dprintk("%s: begin!\n", __func__);
a5d16a4d 3936
66179efe
AA		 3937 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3938 task->tk_status);
3939
a5d16a4d
TM		 3940 data->rpc_status = task->tk_status;
3941 if (RPC_ASSASSINATED(task))
3942 goto out;
3943 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3944 if (data->rpc_status == 0)
3945 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3946 else
3947 goto out;
3948 }
3949 if (data->rpc_status == 0) {
3950 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3951 sizeof(data->lsp->ls_stateid.data));
3952 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3953 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3954 }
a5d16a4d 3955out:
3110ff80 3956 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3957}
3958
3959static void nfs4_lock_release(void *calldata)
3960{
3961 struct nfs4_lockdata *data = calldata;
3962
3110ff80 3963 dprintk("%s: begin!\n", __func__);
2f74c0a0 3964 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3965 if (data->cancelled != 0) {
3966 struct rpc_task *task;
3967 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3968 data->arg.lock_seqid);
3969 if (!IS_ERR(task))
e6b3c4db 3970 rpc_put_task(task);
3110ff80 3971 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3972 } else
3973 nfs_free_seqid(data->arg.lock_seqid);
3974 nfs4_put_lock_state(data->lsp);
3975 put_nfs_open_context(data->ctx);
3976 kfree(data);
3110ff80 3977 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3978}
3979
3980static const struct rpc_call_ops nfs4_lock_ops = {
3981 .rpc_call_prepare = nfs4_lock_prepare,
3982 .rpc_call_done = nfs4_lock_done,
3983 .rpc_release = nfs4_lock_release,
3984};
3985
3986static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3987{
3988 struct nfs4_lockdata *data;
3989 struct rpc_task *task;
5138fde0
TM		 3990 struct rpc_message msg = {
3991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3992 .rpc_cred = state->owner->so_cred,
3993 };
c970aa85
TM		 3994 struct rpc_task_setup task_setup_data = {
3995 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3996 .rpc_message = &msg,
c970aa85 3997 .callback_ops = &nfs4_lock_ops,
101070ca 3998 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3999 .flags = RPC_TASK_ASYNC,
4000 };
a5d16a4d
TM		 4001 int ret;
4002
3110ff80 4003 dprintk("%s: begin!\n", __func__);
cd3758e3 4004 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4005 fl->fl_u.nfs4_fl.owner);
4006 if (data == NULL)
4007 return -ENOMEM;
4008 if (IS_SETLKW(cmd))
4009 data->arg.block = 1;
4010 if (reclaim != 0)
4011 data->arg.reclaim = 1;
5138fde0
TM		 4012 msg.rpc_argp = &data->arg,
4013 msg.rpc_resp = &data->res,
c970aa85
TM		 4014 task_setup_data.callback_data = data;
4015 task = rpc_run_task(&task_setup_data);
7a1218a2 4016 if (IS_ERR(task))
a5d16a4d 4017 return PTR_ERR(task);
a5d16a4d
TM		 4018 ret = nfs4_wait_for_completion_rpc_task(task);
4019 if (ret == 0) {
4020 ret = data->rpc_status;
a5d16a4d
TM		 4021 } else
4022 data->cancelled = 1;
e6b3c4db 4023 rpc_put_task(task);
3110ff80 4024 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4025 return ret;
1da177e4
LT		 4026}
4027
4028static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4029{
202b50dc
TM		 4030 struct nfs_server *server = NFS_SERVER(state->inode);
4031 struct nfs4_exception exception = { };
4032 int err;
4033
4034 do {
42a2d13e
TM		 4035 /* Cache the lock if possible... */
4036 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4037 return 0;
202b50dc
TM		 4038 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4039 if (err != -NFS4ERR_DELAY)
4040 break;
4041 nfs4_handle_exception(server, err, &exception);
4042 } while (exception.retry);
4043 return err;
1da177e4
LT		 4044}
4045
4046static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4047{
202b50dc
TM		 4048 struct nfs_server *server = NFS_SERVER(state->inode);
4049 struct nfs4_exception exception = { };
4050 int err;
4051
6bfc93ef
TM		 4052 err = nfs4_set_lock_state(state, request);
4053 if (err != 0)
4054 return err;
202b50dc 4055 do {
42a2d13e
TM		 4056 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4057 return 0;
202b50dc
TM		 4058 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4059 if (err != -NFS4ERR_DELAY)
4060 break;
4061 nfs4_handle_exception(server, err, &exception);
4062 } while (exception.retry);
4063 return err;
1da177e4
LT		 4064}
4065
4066static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4067{
19e03c57 4068 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4069 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4070 int status;
4071
6bfc93ef 4072 /* Is this a delegated open? */
6bfc93ef
TM		 4073 status = nfs4_set_lock_state(state, request);
4074 if (status != 0)
4075 goto out;
01c3b861
TM		 4076 request->fl_flags |= FL_ACCESS;
4077 status = do_vfs_lock(request->fl_file, request);
4078 if (status < 0)
4079 goto out;
19e03c57 4080 down_read(&nfsi->rwsem);
01c3b861 4081 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4082 /* Yes: cache locks! */
01c3b861 4083 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4084 request->fl_flags = fl_flags & ~FL_SLEEP;
4085 status = do_vfs_lock(request->fl_file, request);
4086 goto out_unlock;
01c3b861 4087 }
6bfc93ef
TM		 4088 status = _nfs4_do_setlk(state, cmd, request, 0);
4089 if (status != 0)
01c3b861 4090 goto out_unlock;
6bfc93ef 4091 /* Note: we always want to sleep here! */
01c3b861 4092 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4093 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4094 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4095out_unlock:
19e03c57 4096 up_read(&nfsi->rwsem);
01c3b861
TM		 4097out:
4098 request->fl_flags = fl_flags;
1da177e4
LT		 4099 return status;
4100}
4101
4102static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4103{
4104 struct nfs4_exception exception = { };
4105 int err;
4106
4107 do {
965b5d67
TM		 4108 err = _nfs4_proc_setlk(state, cmd, request);
4109 if (err == -NFS4ERR_DENIED)
4110 err = -EAGAIN;
1da177e4 4111 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4112 err, &exception);
1da177e4
LT		 4113 } while (exception.retry);
4114 return err;
4115}
4116
4117static int
4118nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4119{
4120 struct nfs_open_context *ctx;
4121 struct nfs4_state *state;
4122 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4123 int status;
4124
4125 /* verify open state */
cd3758e3 4126 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4127 state = ctx->state;
4128
4129 if (request->fl_start < 0 || request->fl_end < 0)
4130 return -EINVAL;
4131
d953126a
TM		 4132 if (IS_GETLK(cmd)) {
4133 if (state != NULL)
4134 return nfs4_proc_getlk(state, F_GETLK, request);
4135 return 0;
4136 }
1da177e4
LT		 4137
4138 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4139 return -EINVAL;
4140
d953126a
TM		 4141 if (request->fl_type == F_UNLCK) {
4142 if (state != NULL)
4143 return nfs4_proc_unlck(state, cmd, request);
4144 return 0;
4145 }
1da177e4 4146
d953126a
TM		 4147 if (state == NULL)
4148 return -ENOLCK;
1da177e4
LT		 4149 do {
4150 status = nfs4_proc_setlk(state, cmd, request);
4151 if ((status != -EAGAIN) || IS_SETLK(cmd))
4152 break;
4153 timeout = nfs4_set_lock_task_retry(timeout);
4154 status = -ERESTARTSYS;
4155 if (signalled())
4156 break;
4157 } while(status < 0);
1da177e4
LT		 4158 return status;
4159}
4160
888e694c
TM		 4161int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4162{
4163 struct nfs_server *server = NFS_SERVER(state->inode);
4164 struct nfs4_exception exception = { };
4165 int err;
4166
4167 err = nfs4_set_lock_state(state, fl);
4168 if (err != 0)
4169 goto out;
4170 do {
4171 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4172 switch (err) {
4173 default:
4174 printk(KERN_ERR "%s: unhandled error %d.\n",
4175 __func__, err);
4176 case 0:
965b5d67 4177 case -ESTALE:
d5122201
TM		 4178 goto out;
4179 case -NFS4ERR_EXPIRED:
4180 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4181 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4182 nfs4_schedule_state_recovery(server->nfs_client);
4183 goto out;
965b5d67
TM		 4184 case -ERESTARTSYS:
4185 /*
4186 * The show must go on: exit, but mark the
4187 * stateid as needing recovery.
4188 */
4189 case -NFS4ERR_ADMIN_REVOKED:
4190 case -NFS4ERR_BAD_STATEID:
4191 case -NFS4ERR_OPENMODE:
4192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4193 err = 0;
4194 goto out;
4195 case -ENOMEM:
4196 case -NFS4ERR_DENIED:
4197 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4198 err = 0;
4199 goto out;
d5122201
TM		 4200 case -NFS4ERR_DELAY:
4201 break;
4202 }
888e694c
TM		 4203 err = nfs4_handle_exception(server, err, &exception);
4204 } while (exception.retry);
4205out:
4206 return err;
4207}
6b3b5496 4208
aa1870af
BF		 4209#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4210
6b3b5496
BF		 4211int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4212 size_t buflen, int flags)
4213{
4b580ee3
BF		 4214 struct inode *inode = dentry->d_inode;
4215
4216 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4217 return -EOPNOTSUPP;
4218
4b580ee3 4219 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4220}
4221
4222/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4223 * and that's what we'll do for e.g. user attributes that haven't been set.
4224 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4225 * attributes in kernel-managed attribute namespaces. */
4226ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4227 size_t buflen)
4228{
aa1870af
BF		 4229 struct inode *inode = dentry->d_inode;
4230
4231 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4232 return -EOPNOTSUPP;
4233
4234 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4235}
4236
4237ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4238{
aa1870af 4239 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4240
096455a2
BF		 4241 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4242 return 0;
6b3b5496
BF		 4243 if (buf && buflen < len)
4244 return -ERANGE;
4245 if (buf)
aa1870af
BF		 4246 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4247 return len;
6b3b5496
BF		 4248}
4249
69aaaae1
TM		 4250static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4251{
4252 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4253 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4254 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4255 return;
4256
4257 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4258 NFS_ATTR_FATTR_NLINK;
4259 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4260 fattr->nlink = 2;
4261}
4262
56659e99 4263int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4264 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4265{
4266 struct nfs_server *server = NFS_SERVER(dir);
4267 u32 bitmask[2] = {
361e624f
MN		 4268 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4269 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4270 };
4271 struct nfs4_fs_locations_arg args = {
4272 .dir_fh = NFS_FH(dir),
c228fd3a 4273 .name = name,
683b57b4
TM		 4274 .page = page,
4275 .bitmask = bitmask,
4276 };
22958463
BH		 4277 struct nfs4_fs_locations_res res = {
4278 .fs_locations = fs_locations,
4279 };
683b57b4
TM		 4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4282 .rpc_argp = &args,
22958463 4283 .rpc_resp = &res,
683b57b4
TM		 4284 };
4285 int status;
4286
3110ff80 4287 dprintk("%s: start\n", __func__);
c228fd3a 4288 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4289 fs_locations->server = server;
830b8e33 4290 fs_locations->nlocations = 0;
cccef3b9 4291 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4292 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4293 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4294 return status;
4295}
4296
557134a3 4297#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4298/*
4299 * nfs4_proc_exchange_id()
4300 *
4301 * Since the clientid has expired, all compounds using sessions
4302 * associated with the stale clientid will be returning
4303 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4304 * be in some phase of session reset.
4305 */
4306static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4307{
4308 nfs4_verifier verifier;
4309 struct nfs41_exchange_id_args args = {
4310 .client = clp,
4311 .flags = clp->cl_exchange_flags,
4312 };
4313 struct nfs41_exchange_id_res res = {
4314 .client = clp,
4315 };
4316 int status;
4317 struct rpc_message msg = {
4318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4319 .rpc_argp = &args,
4320 .rpc_resp = &res,
4321 .rpc_cred = cred,
4322 };
4323 __be32 *p;
4324
4325 dprintk("--> %s\n", __func__);
4326 BUG_ON(clp == NULL);
a7b72103 4327
99fe60d0
BH		 4328 p = (u32 *)verifier.data;
4329 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4330 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4331 args.verifier = &verifier;
4332
4333 while (1) {
4334 args.id_len = scnprintf(args.id, sizeof(args.id),
4335 "%s/%s %u",
4336 clp->cl_ipaddr,
4337 rpc_peeraddr2str(clp->cl_rpcclient,
4338 RPC_DISPLAY_ADDR),
4339 clp->cl_id_uniquifier);
4340
4341 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4342
4343 if (status != NFS4ERR_CLID_INUSE)
4344 break;
4345
4346 if (signalled())
4347 break;
4348
4349 if (++clp->cl_id_uniquifier == 0)
4350 break;
4351 }
4352
4353 dprintk("<-- %s status= %d\n", __func__, status);
4354 return status;
4355}
4356
2050f0cc
AA		 4357struct nfs4_get_lease_time_data {
4358 struct nfs4_get_lease_time_args *args;
4359 struct nfs4_get_lease_time_res *res;
4360 struct nfs_client *clp;
4361};
4362
4363static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4364 void *calldata)
4365{
4366 int ret;
4367 struct nfs4_get_lease_time_data *data =
4368 (struct nfs4_get_lease_time_data *)calldata;
4369
4370 dprintk("--> %s\n", __func__);
4371 /* just setup sequence, do not trigger session recovery
4372 since we're invoked within one */
4373 ret = nfs41_setup_sequence(data->clp->cl_session,
4374 &data->args->la_seq_args,
4375 &data->res->lr_seq_res, 0, task);
4376
4377 BUG_ON(ret == -EAGAIN);
4378 rpc_call_start(task);
4379 dprintk("<-- %s\n", __func__);
4380}
4381
4382/*
4383 * Called from nfs4_state_manager thread for session setup, so don't recover
4384 * from sequence operation or clientid errors.
4385 */
4386static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4387{
4388 struct nfs4_get_lease_time_data *data =
4389 (struct nfs4_get_lease_time_data *)calldata;
4390
4391 dprintk("--> %s\n", __func__);
4392 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4393 switch (task->tk_status) {
4394 case -NFS4ERR_DELAY:
4395 case -NFS4ERR_GRACE:
4396 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4397 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4398 task->tk_status = 0;
eedc020e 4399 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4400 return;
4401 }
4402 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4403 dprintk("<-- %s\n", __func__);
4404}
4405
4406struct rpc_call_ops nfs4_get_lease_time_ops = {
4407 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4408 .rpc_call_done = nfs4_get_lease_time_done,
4409};
4410
4411int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4412{
4413 struct rpc_task *task;
4414 struct nfs4_get_lease_time_args args;
4415 struct nfs4_get_lease_time_res res = {
4416 .lr_fsinfo = fsinfo,
4417 };
4418 struct nfs4_get_lease_time_data data = {
4419 .args = &args,
4420 .res = &res,
4421 .clp = clp,
4422 };
4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4425 .rpc_argp = &args,
4426 .rpc_resp = &res,
4427 };
4428 struct rpc_task_setup task_setup = {
4429 .rpc_client = clp->cl_rpcclient,
4430 .rpc_message = &msg,
4431 .callback_ops = &nfs4_get_lease_time_ops,
4432 .callback_data = &data
4433 };
4434 int status;
4435
4436 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4437 dprintk("--> %s\n", __func__);
4438 task = rpc_run_task(&task_setup);
4439
4440 if (IS_ERR(task))
4441 status = PTR_ERR(task);
4442 else {
4443 status = task->tk_status;
4444 rpc_put_task(task);
4445 }
4446 dprintk("<-- %s return %d\n", __func__, status);
4447
4448 return status;
4449}
4450
b73dafa7
RL		 4451/*
4452 * Reset a slot table
4453 */
4454static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4455 int old_max_slots, int ivalue)
ac72b7b3 4456{
b73dafa7 4457 int i;
ac72b7b3
AA		 4458 int ret = 0;
4459
b73dafa7 4460 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4461
b73dafa7
RL		 4462 /*
4463 * Until we have dynamic slot table adjustment, insist
4464 * upon the same slot table size
4465 */
ac72b7b3
AA		 4466 if (max_slots != old_max_slots) {
4467 dprintk("%s reset slot table does't match old\n",
4468 __func__);
4469 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4470 goto out;
4471 }
4472 spin_lock(&tbl->slot_tbl_lock);
4473 for (i = 0; i < max_slots; ++i)
b73dafa7 4474 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4475 tbl->highest_used_slotid = -1;
4476 spin_unlock(&tbl->slot_tbl_lock);
4477 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4478 tbl, tbl->slots, tbl->max_slots);
4479out:
4480 dprintk("<-- %s: return %d\n", __func__, ret);
4481 return ret;
4482}
4483
b73dafa7
RL		 4484/*
4485 * Reset the forechannel and backchannel slot tables
4486 */
4487static int nfs4_reset_slot_tables(struct nfs4_session *session)
4488{
4489 int status;
4490
4491 status = nfs4_reset_slot_table(&session->fc_slot_table,
4492 session->fc_attrs.max_reqs,
4493 session->fc_slot_table.max_slots,
4494 1);
f8625a6a
RL		 4495 if (status)
4496 return status;
4497
4498 status = nfs4_reset_slot_table(&session->bc_slot_table,
4499 session->bc_attrs.max_reqs,
4500 session->bc_slot_table.max_slots,
4501 0);
b73dafa7
RL		 4502 return status;
4503}
4504
f8625a6a
RL		 4505/* Destroy the slot table */
4506static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4507{
4508 if (session->fc_slot_table.slots != NULL) {
4509 kfree(session->fc_slot_table.slots);
4510 session->fc_slot_table.slots = NULL;
4511 }
4512 if (session->bc_slot_table.slots != NULL) {
4513 kfree(session->bc_slot_table.slots);
4514 session->bc_slot_table.slots = NULL;
4515 }
4516 return;
4517}
4518
fc931582
AA		 4519/*
4520 * Initialize slot table
4521 */
050047ce
RL		 4522static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4523 int max_slots, int ivalue)
fc931582 4524{
050047ce 4525 int i;
fc931582
AA		 4526 struct nfs4_slot *slot;
4527 int ret = -ENOMEM;
4528
4529 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4530
050047ce 4531 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4532
4533 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4534 if (!slot)
4535 goto out;
4536 for (i = 0; i < max_slots; ++i)
050047ce 4537 slot[i].seq_nr = ivalue;
fc931582
AA		 4538 ret = 0;
4539
4540 spin_lock(&tbl->slot_tbl_lock);
4541 if (tbl->slots != NULL) {
4542 spin_unlock(&tbl->slot_tbl_lock);
4543 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4544 __func__, tbl, tbl->slots);
4545 WARN_ON(1);
4546 goto out_free;
4547 }
4548 tbl->max_slots = max_slots;
4549 tbl->slots = slot;
4550 tbl->highest_used_slotid = -1; /* no slot is currently used */
4551 spin_unlock(&tbl->slot_tbl_lock);
4552 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4553 tbl, tbl->slots, tbl->max_slots);
4554out:
4555 dprintk("<-- %s: return %d\n", __func__, ret);
4556 return ret;
050047ce 4557
fc931582
AA		 4558out_free:
4559 kfree(slot);
4560 goto out;
4561}
4562
050047ce
RL		 4563/*
4564 * Initialize the forechannel and backchannel tables
4565 */
4566static int nfs4_init_slot_tables(struct nfs4_session *session)
4567{
4568 int status;
4569
4570 status = nfs4_init_slot_table(&session->fc_slot_table,
4571 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4572 if (status)
4573 return status;
050047ce 4574
f8625a6a
RL		 4575 status = nfs4_init_slot_table(&session->bc_slot_table,
4576 session->bc_attrs.max_reqs, 0);
4577 if (status)
4578 nfs4_destroy_slot_tables(session);
4579
4580 return status;
557134a3
AA		 4581}
4582
4583struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4584{
4585 struct nfs4_session *session;
4586 struct nfs4_slot_table *tbl;
4587
4588 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4589 if (!session)
4590 return NULL;
76db6d95
AA		 4591
4592 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4593 /*
4594 * The create session reply races with the server back
4595 * channel probe. Mark the client NFS_CS_SESSION_INITING
4596 * so that the client back channel can find the
4597 * nfs_client struct
4598 */
4599 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4600
557134a3
AA		 4601 tbl = &session->fc_slot_table;
4602 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4603 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4604
4605 tbl = &session->bc_slot_table;
4606 spin_lock_init(&tbl->slot_tbl_lock);
4607 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4608
557134a3
AA		 4609 session->clp = clp;
4610 return session;
4611}
4612
4613void nfs4_destroy_session(struct nfs4_session *session)
4614{
5a0ffe54
AA		 4615 nfs4_proc_destroy_session(session);
4616 dprintk("%s Destroy backchannel for xprt %p\n",
4617 __func__, session->clp->cl_rpcclient->cl_xprt);
4618 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4619 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4620 nfs4_destroy_slot_tables(session);
557134a3
AA		 4621 kfree(session);
4622}
4623
fc931582
AA		 4624/*
4625 * Initialize the values to be used by the client in CREATE_SESSION
4626 * If nfs4_init_session set the fore channel request and response sizes,
4627 * use them.
4628 *
4629 * Set the back channel max_resp_sz_cached to zero to force the client to
4630 * always set csa_cachethis to FALSE because the current implementation
4631 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4632 */
4633static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4634{
4635 struct nfs4_session *session = args->client->cl_session;
4636 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4637 mxresp_sz = session->fc_attrs.max_resp_sz;
4638
4639 if (mxrqst_sz == 0)
4640 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4641 if (mxresp_sz == 0)
4642 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4643 /* Fore channel attributes */
4644 args->fc_attrs.headerpadsz = 0;
4645 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4646 args->fc_attrs.max_resp_sz = mxresp_sz;
4647 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4648 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4649 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4650
4651 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4652 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4653 __func__,
4654 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4655 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4656 args->fc_attrs.max_reqs);
4657
4658 /* Back channel attributes */
4659 args->bc_attrs.headerpadsz = 0;
4660 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4661 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4662 args->bc_attrs.max_resp_sz_cached = 0;
4663 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4664 args->bc_attrs.max_reqs = 1;
4665
4666 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4667 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4668 __func__,
4669 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4670 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4671 args->bc_attrs.max_reqs);
4672}
4673
8d35301d
AA		 4674static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4675{
4676 if (rcvd <= sent)
4677 return 0;
4678 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4679 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4680 return -EINVAL;
4681}
4682
4683#define _verify_fore_channel_attr(_name_) \
4684 _verify_channel_attr("fore", #_name_, \
4685 args->fc_attrs._name_, \
4686 session->fc_attrs._name_)
4687
4688#define _verify_back_channel_attr(_name_) \
4689 _verify_channel_attr("back", #_name_, \
4690 args->bc_attrs._name_, \
4691 session->bc_attrs._name_)
4692
4693/*
4694 * The server is not allowed to increase the fore channel header pad size,
4695 * maximum response size, or maximum number of operations.
4696 *
4697 * The back channel attributes are only negotiatied down: We send what the
4698 * (back channel) server insists upon.
4699 */
4700static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4701 struct nfs4_session *session)
4702{
4703 int ret = 0;
4704
4705 ret |= _verify_fore_channel_attr(headerpadsz);
4706 ret |= _verify_fore_channel_attr(max_resp_sz);
4707 ret |= _verify_fore_channel_attr(max_ops);
4708
4709 ret |= _verify_back_channel_attr(headerpadsz);
4710 ret |= _verify_back_channel_attr(max_rqst_sz);
4711 ret |= _verify_back_channel_attr(max_resp_sz);
4712 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4713 ret |= _verify_back_channel_attr(max_ops);
4714 ret |= _verify_back_channel_attr(max_reqs);
4715
4716 return ret;
4717}
4718
fc931582
AA		 4719static int _nfs4_proc_create_session(struct nfs_client *clp)
4720{
4721 struct nfs4_session *session = clp->cl_session;
4722 struct nfs41_create_session_args args = {
4723 .client = clp,
4724 .cb_program = NFS4_CALLBACK,
4725 };
4726 struct nfs41_create_session_res res = {
4727 .client = clp,
4728 };
4729 struct rpc_message msg = {
4730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4731 .rpc_argp = &args,
4732 .rpc_resp = &res,
4733 };
4734 int status;
4735
4736 nfs4_init_channel_attrs(&args);
0f91421e 4737 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4738
4739 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4740
8d35301d
AA		 4741 if (!status)
4742 /* Verify the session's negotiated channel_attrs values */
4743 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4744 if (!status) {
4745 /* Increment the clientid slot sequence id */
4746 clp->cl_seqid++;
4747 }
4748
4749 return status;
4750}
4751
4752/*
4753 * Issues a CREATE_SESSION operation to the server.
4754 * It is the responsibility of the caller to verify the session is
4755 * expired before calling this routine.
4756 */
ac72b7b3 4757int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4758{
4759 int status;
4760 unsigned *ptr;
4761 struct nfs_fsinfo fsinfo;
4762 struct nfs4_session *session = clp->cl_session;
4763
4764 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4765
4766 status = _nfs4_proc_create_session(clp);
4767 if (status)
4768 goto out;
4769
ac72b7b3
AA		 4770 /* Init or reset the fore channel */
4771 if (reset)
b73dafa7 4772 status = nfs4_reset_slot_tables(session);
ac72b7b3 4773 else
050047ce 4774 status = nfs4_init_slot_tables(session);
fc931582
AA		 4775 dprintk("fore channel slot table initialization returned %d\n", status);
4776 if (status)
4777 goto out;
4778
4779 ptr = (unsigned *)&session->sess_id.data[0];
4780 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4781 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4782
ac72b7b3
AA		 4783 if (reset)
4784 /* Lease time is aleady set */
4785 goto out;
4786
fc931582
AA		 4787 /* Get the lease time */
4788 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4789 if (status == 0) {
4790 /* Update lease time and schedule renewal */
4791 spin_lock(&clp->cl_lock);
4792 clp->cl_lease_time = fsinfo.lease_time * HZ;
4793 clp->cl_last_renewal = jiffies;
4794 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4795 spin_unlock(&clp->cl_lock);
4796
4797 nfs4_schedule_state_renewal(clp);
4798 }
4799out:
4800 dprintk("<-- %s\n", __func__);
4801 return status;
4802}
4803
0f3e66c6
AA		 4804/*
4805 * Issue the over-the-wire RPC DESTROY_SESSION.
4806 * The caller must serialize access to this routine.
4807 */
4808int nfs4_proc_destroy_session(struct nfs4_session *session)
4809{
4810 int status = 0;
4811 struct rpc_message msg;
4812
4813 dprintk("--> nfs4_proc_destroy_session\n");
4814
4815 /* session is still being setup */
4816 if (session->clp->cl_cons_state != NFS_CS_READY)
4817 return status;
4818
4819 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4820 msg.rpc_argp = session;
4821 msg.rpc_resp = NULL;
4822 msg.rpc_cred = NULL;
4823 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4824
4825 if (status)
4826 printk(KERN_WARNING
4827 "Got error %d from the server on DESTROY_SESSION. "
4828 "Session has been destroyed regardless...\n", status);
4829
4830 dprintk("<-- nfs4_proc_destroy_session\n");
4831 return status;
4832}
4833
fccba804
TM		 4834int nfs4_init_session(struct nfs_server *server)
4835{
4836 struct nfs_client *clp = server->nfs_client;
4837 int ret;
4838
4839 if (!nfs4_has_session(clp))
4840 return 0;
4841
4842 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4843 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4844 ret = nfs4_recover_expired_lease(server);
4845 if (!ret)
4846 ret = nfs4_check_client_ready(clp);
4847 return ret;
4848}
4849
fc01cea9
AA		 4850/*
4851 * Renew the cl_session lease.
4852 */
4853static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4854{
4855 struct nfs4_sequence_args args;
4856 struct nfs4_sequence_res res;
4857
4858 struct rpc_message msg = {
4859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4860 .rpc_argp = &args,
4861 .rpc_resp = &res,
4862 .rpc_cred = cred,
4863 };
4864
4865 args.sa_cache_this = 0;
4866
4867 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4868 &res, 0);
4869}
4870
4871void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4872{
4873 struct nfs_client *clp = (struct nfs_client *)data;
4874
4875 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4876
4877 if (task->tk_status < 0) {
4878 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4879
4880 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4881 == -EAGAIN) {
eedc020e 4882 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4883 return;
4884 }
4885 }
4886 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4887 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4888
fc01cea9
AA		 4889 kfree(task->tk_msg.rpc_argp);
4890 kfree(task->tk_msg.rpc_resp);
4891
4892 dprintk("<-- %s\n", __func__);
4893}
4894
4895static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4896{
4897 struct nfs_client *clp;
4898 struct nfs4_sequence_args *args;
4899 struct nfs4_sequence_res *res;
4900
4901 clp = (struct nfs_client *)data;
4902 args = task->tk_msg.rpc_argp;
4903 res = task->tk_msg.rpc_resp;
4904
4905 if (nfs4_setup_sequence(clp, args, res, 0, task))
4906 return;
4907 rpc_call_start(task);
4908}
4909
4910static const struct rpc_call_ops nfs41_sequence_ops = {
4911 .rpc_call_done = nfs41_sequence_call_done,
4912 .rpc_call_prepare = nfs41_sequence_prepare,
4913};
4914
4915static int nfs41_proc_async_sequence(struct nfs_client *clp,
4916 struct rpc_cred *cred)
4917{
4918 struct nfs4_sequence_args *args;
4919 struct nfs4_sequence_res *res;
4920 struct rpc_message msg = {
4921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4922 .rpc_cred = cred,
4923 };
4924
4925 args = kzalloc(sizeof(*args), GFP_KERNEL);
4926 if (!args)
4927 return -ENOMEM;
4928 res = kzalloc(sizeof(*res), GFP_KERNEL);
4929 if (!res) {
4930 kfree(args);
4931 return -ENOMEM;
4932 }
4933 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4934 msg.rpc_argp = args;
4935 msg.rpc_resp = res;
4936
4937 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4938 &nfs41_sequence_ops, (void *)clp);
4939}
4940
557134a3
AA		 4941#endif /* CONFIG_NFS_V4_1 */
4942
591d71cb 4943struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4944 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4945 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4946 .recover_open = nfs4_open_reclaim,
4947 .recover_lock = nfs4_lock_reclaim,
591d71cb 4948 .establish_clid = nfs4_init_clientid,
90a16617 4949 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4950};
4951
591d71cb
AA		 4952#if defined(CONFIG_NFS_V4_1)
4953struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4954 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4955 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4956 .recover_open = nfs4_open_reclaim,
4957 .recover_lock = nfs4_lock_reclaim,
4958 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4959 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4960};
4961#endif /* CONFIG_NFS_V4_1 */
4962
4963struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4964 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4965 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4966 .recover_open = nfs4_open_expired,
4967 .recover_lock = nfs4_lock_expired,
4968 .establish_clid = nfs4_init_clientid,
90a16617 4969 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4970};
4971
4972#if defined(CONFIG_NFS_V4_1)
4973struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4974 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4975 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4976 .recover_open = nfs4_open_expired,
4977 .recover_lock = nfs4_lock_expired,
591d71cb 4978 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4979 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4980};
591d71cb 4981#endif /* CONFIG_NFS_V4_1 */
1da177e4 4982
29fba38b
BH		 4983struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4984 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4985 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4986 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4987};
4988
4989#if defined(CONFIG_NFS_V4_1)
4990struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4991 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4992 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4993 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4994};
4995#endif
4996
4997/*
4998 * Per minor version reboot and network partition recovery ops
4999 */
5000
591d71cb
AA		 5001struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5002 &nfs40_reboot_recovery_ops,
5003#if defined(CONFIG_NFS_V4_1)
5004 &nfs41_reboot_recovery_ops,
5005#endif
5006};
5007
5008struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5009 &nfs40_nograce_recovery_ops,
5010#if defined(CONFIG_NFS_V4_1)
5011 &nfs41_nograce_recovery_ops,
5012#endif
5013};
5014
29fba38b
BH		 5015struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5016 &nfs40_state_renewal_ops,
5017#if defined(CONFIG_NFS_V4_1)
5018 &nfs41_state_renewal_ops,
5019#endif
5020};
5021
92e1d5be 5022static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5023 .permission = nfs_permission,
5024 .getattr = nfs_getattr,
5025 .setattr = nfs_setattr,
5026 .getxattr = nfs4_getxattr,
5027 .setxattr = nfs4_setxattr,
5028 .listxattr = nfs4_listxattr,
5029};
5030
509de811 5031const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5032 .version = 4, /* protocol version */
5033 .dentry_ops = &nfs4_dentry_operations,
5034 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5035 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5036 .getroot = nfs4_proc_get_root,
5037 .getattr = nfs4_proc_getattr,
5038 .setattr = nfs4_proc_setattr,
2b3de441 5039 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5040 .lookup = nfs4_proc_lookup,
5041 .access = nfs4_proc_access,
5042 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5043 .create = nfs4_proc_create,
5044 .remove = nfs4_proc_remove,
5045 .unlink_setup = nfs4_proc_unlink_setup,
5046 .unlink_done = nfs4_proc_unlink_done,
5047 .rename = nfs4_proc_rename,
5048 .link = nfs4_proc_link,
5049 .symlink = nfs4_proc_symlink,
5050 .mkdir = nfs4_proc_mkdir,
5051 .rmdir = nfs4_proc_remove,
5052 .readdir = nfs4_proc_readdir,
5053 .mknod = nfs4_proc_mknod,
5054 .statfs = nfs4_proc_statfs,
5055 .fsinfo = nfs4_proc_fsinfo,
5056 .pathconf = nfs4_proc_pathconf,
e9326dca 5057 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5058 .decode_dirent = nfs4_decode_dirent,
5059 .read_setup = nfs4_proc_read_setup,
ec06c096 5060 .read_done = nfs4_read_done,
1da177e4 5061 .write_setup = nfs4_proc_write_setup,
788e7a89 5062 .write_done = nfs4_write_done,
1da177e4 5063 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5064 .commit_done = nfs4_commit_done,
1da177e4 5065 .lock = nfs4_proc_lock,
e50a1c2e 5066 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5067 .close_context = nfs4_close_context,
1da177e4
LT		 5068};
5069
5070/*
5071 * Local variables:
5072 * c-basic-offset: 8
5073 * End:
5074 */
Linux 6.x block layer and io_uring tree(s)