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Merge branch 'devel' into linux-next
[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
a9ed2e25 1498static 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);
a9ed2e25
TM		 1506 switch (err) {
1507 default:
1508 goto out;
1509 case -NFS4ERR_GRACE:
1510 case -NFS4ERR_DELAY:
1511 nfs4_handle_exception(server, err, &exception);
1512 err = 0;
1513 }
202b50dc 1514 } while (exception.retry);
a9ed2e25 1515out:
202b50dc
TM		 1516 return err;
1517}
1518
1da177e4
LT		 1519static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1520{
1da177e4 1521 struct nfs_open_context *ctx;
864472e9 1522 int ret;
1da177e4 1523
864472e9
TM		 1524 ctx = nfs4_state_find_open_context(state);
1525 if (IS_ERR(ctx))
1526 return PTR_ERR(ctx);
539cd03a 1527 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1528 put_nfs_open_context(ctx);
1529 return ret;
1da177e4
LT		 1530}
1531
aa53ed54
JL		 1532/*
1533 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1534 * fields corresponding to attributes that were used to store the verifier.
1535 * Make sure we clobber those fields in the later setattr call
1536 */
1537static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1538{
1539 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1540 !(sattr->ia_valid & ATTR_ATIME_SET))
1541 sattr->ia_valid |= ATTR_ATIME;
1542
1543 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1544 !(sattr->ia_valid & ATTR_MTIME_SET))
1545 sattr->ia_valid |= ATTR_MTIME;
1546}
1547
1da177e4 1548/*
24ac23ab 1549 * Returns a referenced nfs4_state
1da177e4 1550 */
dc0b027d 1551static 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		 1552{
1553 struct nfs4_state_owner *sp;
1554 struct nfs4_state *state = NULL;
1555 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1556 struct nfs4_opendata *opendata;
aac00a8d 1557 int status;
1da177e4
LT		 1558
1559 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1560 status = -ENOMEM;
1561 if (!(sp = nfs4_get_state_owner(server, cred))) {
1562 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1563 goto out_err;
1564 }
58d9714a
TM		 1565 status = nfs4_recover_expired_lease(server);
1566 if (status != 0)
b4454fe1 1567 goto err_put_state_owner;
aac00a8d 1568 if (path->dentry->d_inode != NULL)
dc0b027d 1569 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1570 status = -ENOMEM;
dc0b027d 1571 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1572 if (opendata == NULL)
95d35cb4 1573 goto err_put_state_owner;
1da177e4 1574
aac00a8d
TM		 1575 if (path->dentry->d_inode != NULL)
1576 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1577
24ac23ab 1578 status = _nfs4_proc_open(opendata);
1da177e4 1579 if (status != 0)
c6d00e63 1580 goto err_opendata_put;
1da177e4 1581
aa53ed54
JL		 1582 if (opendata->o_arg.open_flags & O_EXCL)
1583 nfs4_exclusive_attrset(opendata, sattr);
1584
24ac23ab 1585 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1586 status = PTR_ERR(state);
1587 if (IS_ERR(state))
c6d00e63 1588 goto err_opendata_put;
c6d00e63 1589 nfs4_opendata_put(opendata);
1da177e4 1590 nfs4_put_state_owner(sp);
1da177e4
LT		 1591 *res = state;
1592 return 0;
c6d00e63
TM		 1593err_opendata_put:
1594 nfs4_opendata_put(opendata);
e56e0b78
TM		 1595err_put_state_owner:
1596 nfs4_put_state_owner(sp);
1da177e4 1597out_err:
1da177e4
LT		 1598 *res = NULL;
1599 return status;
1600}
1601
1602
dc0b027d 1603static 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		 1604{
1605 struct nfs4_exception exception = { };
1606 struct nfs4_state *res;
1607 int status;
1608
1609 do {
dc0b027d 1610 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1611 if (status == 0)
1612 break;
1613 /* NOTE: BAD_SEQID means the server and client disagree about the
1614 * book-keeping w.r.t. state-changing operations
1615 * (OPEN/CLOSE/LOCK/LOCKU...)
1616 * It is actually a sign of a bug on the client or on the server.
1617 *
1618 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1619 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1620 * have unhashed the old state_owner for us, and that we can
1621 * therefore safely retry using a new one. We should still warn
1622 * the user though...
1623 */
1624 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1625 printk(KERN_WARNING "NFS: v4 server %s "
1626 " returned a bad sequence-id error!\n",
1627 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1628 exception.retry = 1;
1629 continue;
1630 }
550f5747
TM		 1631 /*
1632 * BAD_STATEID on OPEN means that the server cancelled our
1633 * state before it received the OPEN_CONFIRM.
1634 * Recover by retrying the request as per the discussion
1635 * on Page 181 of RFC3530.
1636 */
1637 if (status == -NFS4ERR_BAD_STATEID) {
1638 exception.retry = 1;
1639 continue;
1640 }
aac00a8d
TM		 1641 if (status == -EAGAIN) {
1642 /* We must have found a delegation */
1643 exception.retry = 1;
1644 continue;
1645 }
1da177e4
LT		 1646 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1647 status, &exception));
1648 } while (exception.retry);
1649 return res;
1650}
1651
659bfcd6
TM		 1652static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1653 struct nfs_fattr *fattr, struct iattr *sattr,
1654 struct nfs4_state *state)
1da177e4 1655{
3e4f6290 1656 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1657 struct nfs_setattrargs arg = {
3e4f6290 1658 .fh = NFS_FH(inode),
1da177e4
LT		 1659 .iap = sattr,
1660 .server = server,
1661 .bitmask = server->attr_bitmask,
1662 };
1663 struct nfs_setattrres res = {
1664 .fattr = fattr,
1665 .server = server,
1666 };
1667 struct rpc_message msg = {
659bfcd6
TM		 1668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1669 .rpc_argp = &arg,
1670 .rpc_resp = &res,
1671 .rpc_cred = cred,
1da177e4 1672 };
26e976a8 1673 unsigned long timestamp = jiffies;
65e4308d 1674 int status;
1da177e4 1675
0e574af1 1676 nfs_fattr_init(fattr);
1da177e4 1677
3e4f6290
TM		 1678 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1679 /* Use that stateid */
1680 } else if (state != NULL) {
08e9eac4
TM		 1681 nfs4_copy_stateid(&arg.stateid, state, current->files);
1682 } else
1da177e4
LT		 1683 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1684
cccef3b9 1685 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1686 if (status == 0 && state != NULL)
1687 renew_lease(server, timestamp);
65e4308d 1688 return status;
1da177e4
LT		 1689}
1690
659bfcd6
TM		 1691static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1692 struct nfs_fattr *fattr, struct iattr *sattr,
1693 struct nfs4_state *state)
1da177e4 1694{
3e4f6290 1695 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1696 struct nfs4_exception exception = { };
1697 int err;
1698 do {
1699 err = nfs4_handle_exception(server,
659bfcd6 1700 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1701 &exception);
1702 } while (exception.retry);
1703 return err;
1704}
1705
1706struct nfs4_closedata {
4a35bd41 1707 struct path path;
1da177e4
LT		 1708 struct inode *inode;
1709 struct nfs4_state *state;
1710 struct nfs_closeargs arg;
1711 struct nfs_closeres res;
516a6af6 1712 struct nfs_fattr fattr;
26e976a8 1713 unsigned long timestamp;
1da177e4
LT		 1714};
1715
963d8fe5 1716static void nfs4_free_closedata(void *data)
9512135d 1717{
963d8fe5
TM		 1718 struct nfs4_closedata *calldata = data;
1719 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1720
1721 nfs4_put_open_state(calldata->state);
1722 nfs_free_seqid(calldata->arg.seqid);
9512135d 1723 nfs4_put_state_owner(sp);
31f31db1 1724 path_put(&calldata->path);
9512135d
TM		 1725 kfree(calldata);
1726}
1727
963d8fe5 1728static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1729{
963d8fe5 1730 struct nfs4_closedata *calldata = data;
1da177e4 1731 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1732 struct nfs_server *server = NFS_SERVER(calldata->inode);
1733
19ddab06 1734 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1735 if (RPC_ASSASSINATED(task))
1736 return;
1da177e4
LT		 1737 /* hmm. we are done with the inode, and in the process of freeing
1738 * the state_owner. we keep this around to process errors
1739 */
1da177e4
LT		 1740 switch (task->tk_status) {
1741 case 0:
45328c35 1742 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1743 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1744 break;
1745 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1746 case -NFS4ERR_OLD_STATEID:
1747 case -NFS4ERR_BAD_STATEID:
1da177e4 1748 case -NFS4ERR_EXPIRED:
dc0b027d 1749 if (calldata->arg.fmode == 0)
9e33bed5 1750 break;
1da177e4 1751 default:
9e33bed5 1752 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1753 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1754 return;
1755 }
1756 }
19ddab06 1757 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1758 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1759}
1760
4ce70ada 1761static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1762{
4ce70ada 1763 struct nfs4_closedata *calldata = data;
9512135d 1764 struct nfs4_state *state = calldata->state;
003707c7 1765 int clear_rd, clear_wr, clear_rdwr;
9512135d 1766
963d8fe5 1767 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1768 return;
003707c7 1769
003707c7 1770 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1771 spin_lock(&state->owner->so_lock);
003707c7 1772 /* Calculate the change in open mode */
e7616923 1773 if (state->n_rdwr == 0) {
003707c7 1774 if (state->n_rdonly == 0) {
003707c7
TM		 1775 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1776 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1777 }
1778 if (state->n_wronly == 0) {
003707c7
TM		 1779 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1780 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1781 }
e7616923 1782 }
4cecb76f 1783 spin_unlock(&state->owner->so_lock);
003707c7 1784 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1785 /* Note: exit _without_ calling nfs4_close_done */
1786 task->tk_action = NULL;
9512135d
TM		 1787 return;
1788 }
516a6af6 1789 nfs_fattr_init(calldata->res.fattr);
45328c35 1790 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1791 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1792 calldata->arg.fmode = FMODE_READ;
45328c35 1793 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1794 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1795 calldata->arg.fmode = FMODE_WRITE;
45328c35 1796 }
26e976a8 1797 calldata->timestamp = jiffies;
19ddab06
AA		 1798 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1799 &calldata->arg.seq_args, &calldata->res.seq_res,
1800 1, task))
1801 return;
5138fde0 1802 rpc_call_start(task);
1da177e4
LT		 1803}
1804
963d8fe5 1805static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1806 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1807 .rpc_call_done = nfs4_close_done,
1808 .rpc_release = nfs4_free_closedata,
1809};
1810
1da177e4
LT		 1811/*
1812 * It is possible for data to be read/written from a mem-mapped file
1813 * after the sys_close call (which hits the vfs layer as a flush).
1814 * This means that we can't safely call nfsv4 close on a file until
1815 * the inode is cleared. This in turn means that we are not good
1816 * NFSv4 citizens - we do not indicate to the server to update the file's
1817 * share state even when we are done with one of the three share
1818 * stateid's in the inode.
1819 *
1820 * NOTE: Caller must be holding the sp->so_owner semaphore!
1821 */
a49c3c77 1822int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1823{
4a35bd41 1824 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1825 struct nfs4_closedata *calldata;
b39e625b
TM		 1826 struct nfs4_state_owner *sp = state->owner;
1827 struct rpc_task *task;
5138fde0
TM		 1828 struct rpc_message msg = {
1829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1830 .rpc_cred = state->owner->so_cred,
1831 };
c970aa85
TM		 1832 struct rpc_task_setup task_setup_data = {
1833 .rpc_client = server->client,
5138fde0 1834 .rpc_message = &msg,
c970aa85 1835 .callback_ops = &nfs4_close_ops,
101070ca 1836 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1837 .flags = RPC_TASK_ASYNC,
1838 };
9512135d 1839 int status = -ENOMEM;
1da177e4 1840
19ddab06 1841 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1842 if (calldata == NULL)
9512135d 1843 goto out;
4a35bd41 1844 calldata->inode = state->inode;
1da177e4 1845 calldata->state = state;
4a35bd41 1846 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1847 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1848 if (nfs4_has_session(server->nfs_client))
1849 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1850 /* Serialization for the sequence id */
cee54fc9 1851 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1852 if (calldata->arg.seqid == NULL)
1853 goto out_free_calldata;
dc0b027d 1854 calldata->arg.fmode = 0;
a65318bf 1855 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1856 calldata->res.fattr = &calldata->fattr;
c1d51931 1857 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1858 calldata->res.server = server;
5f7dbd5c 1859 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1860 calldata->path.mnt = mntget(path->mnt);
1861 calldata->path.dentry = dget(path->dentry);
9512135d 1862
5138fde0
TM		 1863 msg.rpc_argp = &calldata->arg,
1864 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1865 task_setup_data.callback_data = calldata;
1866 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1867 if (IS_ERR(task))
1868 return PTR_ERR(task);
a49c3c77
TM		 1869 status = 0;
1870 if (wait)
1871 status = rpc_wait_for_completion_task(task);
b39e625b 1872 rpc_put_task(task);
a49c3c77 1873 return status;
9512135d
TM		 1874out_free_calldata:
1875 kfree(calldata);
1876out:
b39e625b
TM		 1877 nfs4_put_open_state(state);
1878 nfs4_put_state_owner(sp);
9512135d 1879 return status;
1da177e4
LT		 1880}
1881
dc0b027d 1882static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1883{
1884 struct file *filp;
1b45c46c 1885 int ret;
02a913a7 1886
1b45c46c 1887 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1888 if (fmode & FMODE_EXEC) {
af22f94a 1889 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1890 state->owner->so_cred,
1891 nd->intent.open.flags);
1892 if (ret < 0)
1893 goto out_close;
1894 }
4a35bd41 1895 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1896 if (!IS_ERR(filp)) {
1897 struct nfs_open_context *ctx;
cd3758e3 1898 ctx = nfs_file_open_context(filp);
02a913a7 1899 ctx->state = state;
95cf959b
TM		 1900 return 0;
1901 }
1b45c46c
TM		 1902 ret = PTR_ERR(filp);
1903out_close:
dc0b027d 1904 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1905 return ret;
02a913a7
TM		 1906}
1907
1908struct dentry *
1da177e4
LT		 1909nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1910{
ad389da7 1911 struct path path = {
4ac91378 1912 .mnt = nd->path.mnt,
ad389da7
TM		 1913 .dentry = dentry,
1914 };
4ac91378 1915 struct dentry *parent;
1da177e4
LT		 1916 struct iattr attr;
1917 struct rpc_cred *cred;
1918 struct nfs4_state *state;
02a913a7 1919 struct dentry *res;
dc0b027d 1920 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1921
1922 if (nd->flags & LOOKUP_CREATE) {
1923 attr.ia_mode = nd->intent.open.create_mode;
1924 attr.ia_valid = ATTR_MODE;
1925 if (!IS_POSIXACL(dir))
ce3b0f8d 1926 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1927 } else {
1928 attr.ia_valid = 0;
1929 BUG_ON(nd->intent.open.flags & O_CREAT);
1930 }
1931
98a8e323 1932 cred = rpc_lookup_cred();
1da177e4 1933 if (IS_ERR(cred))
02a913a7 1934 return (struct dentry *)cred;
565277f6
TM		 1935 parent = dentry->d_parent;
1936 /* Protect against concurrent sillydeletes */
1937 nfs_block_sillyrename(parent);
dc0b027d 1938 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1939 put_rpccred(cred);
02a913a7 1940 if (IS_ERR(state)) {
d75340cc 1941 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1942 d_add(dentry, NULL);
d75340cc
TM		 1943 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1944 }
565277f6 1945 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1946 return (struct dentry *)state;
1947 }
24ac23ab 1948 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1949 if (res != NULL)
deee9369 1950 path.dentry = res;
d75340cc 1951 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1952 nfs_unblock_sillyrename(parent);
dc0b027d 1953 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1954 return res;
1da177e4
LT		 1955}
1956
1957int
02a913a7 1958nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1959{
ad389da7 1960 struct path path = {
4ac91378 1961 .mnt = nd->path.mnt,
ad389da7
TM		 1962 .dentry = dentry,
1963 };
1da177e4
LT		 1964 struct rpc_cred *cred;
1965 struct nfs4_state *state;
dc0b027d 1966 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1967
98a8e323 1968 cred = rpc_lookup_cred();
1da177e4
LT		 1969 if (IS_ERR(cred))
1970 return PTR_ERR(cred);
dc0b027d 1971 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1972 put_rpccred(cred);
02a913a7
TM		 1973 if (IS_ERR(state)) {
1974 switch (PTR_ERR(state)) {
1975 case -EPERM:
1976 case -EACCES:
1977 case -EDQUOT:
1978 case -ENOSPC:
1979 case -EROFS:
1980 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1981 return 1;
b87c0adf
CL		 1982 default:
1983 goto out_drop;
02a913a7 1984 }
02a913a7 1985 }
24ac23ab 1986 if (state->inode == dentry->d_inode) {
d75340cc 1987 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1988 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1989 return 1;
1990 }
dc0b027d 1991 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1992out_drop:
1993 d_drop(dentry);
1da177e4
LT		 1994 return 0;
1995}
1996
1185a552 1997static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 1998{
1999 if (ctx->state == NULL)
2000 return;
2001 if (is_sync)
2002 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2003 else
2004 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2005}
1da177e4
LT		 2006
2007static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2008{
43652ad5
BH		 2009 struct nfs4_server_caps_arg args = {
2010 .fhandle = fhandle,
2011 };
1da177e4
LT		 2012 struct nfs4_server_caps_res res = {};
2013 struct rpc_message msg = {
2014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2015 .rpc_argp = &args,
1da177e4
LT		 2016 .rpc_resp = &res,
2017 };
2018 int status;
2019
cccef3b9 2020 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2021 if (status == 0) {
2022 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2023 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2024 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2025 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2026 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2027 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2028 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2029 server->caps |= NFS_CAP_ACLS;
2030 if (res.has_links != 0)
2031 server->caps |= NFS_CAP_HARDLINKS;
2032 if (res.has_symlinks != 0)
2033 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2034 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2035 server->caps |= NFS_CAP_FILEID;
2036 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2037 server->caps |= NFS_CAP_MODE;
2038 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2039 server->caps |= NFS_CAP_NLINK;
2040 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2041 server->caps |= NFS_CAP_OWNER;
2042 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2043 server->caps |= NFS_CAP_OWNER_GROUP;
2044 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2045 server->caps |= NFS_CAP_ATIME;
2046 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2047 server->caps |= NFS_CAP_CTIME;
2048 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2049 server->caps |= NFS_CAP_MTIME;
2050
a65318bf
TM		 2051 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2052 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2053 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2054 server->acl_bitmask = res.acl_bitmask;
2055 }
cccef3b9 2056
1da177e4
LT		 2057 return status;
2058}
2059
55a97593 2060int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2061{
2062 struct nfs4_exception exception = { };
2063 int err;
2064 do {
2065 err = nfs4_handle_exception(server,
2066 _nfs4_server_capabilities(server, fhandle),
2067 &exception);
2068 } while (exception.retry);
2069 return err;
2070}
2071
2072static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2073 struct nfs_fsinfo *info)
2074{
1da177e4
LT		 2075 struct nfs4_lookup_root_arg args = {
2076 .bitmask = nfs4_fattr_bitmap,
2077 };
2078 struct nfs4_lookup_res res = {
2079 .server = server,
0e574af1 2080 .fattr = info->fattr,
1da177e4
LT		 2081 .fh = fhandle,
2082 };
2083 struct rpc_message msg = {
2084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2085 .rpc_argp = &args,
2086 .rpc_resp = &res,
2087 };
008f55d0 2088
0e574af1 2089 nfs_fattr_init(info->fattr);
fccba804 2090 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2091}
2092
2093static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2094 struct nfs_fsinfo *info)
2095{
2096 struct nfs4_exception exception = { };
2097 int err;
2098 do {
2099 err = nfs4_handle_exception(server,
2100 _nfs4_lookup_root(server, fhandle, info),
2101 &exception);
2102 } while (exception.retry);
2103 return err;
2104}
2105
54ceac45
DH		 2106/*
2107 * get the file handle for the "/" directory on the server
2108 */
1da177e4 2109static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2110 struct nfs_fsinfo *info)
1da177e4 2111{
1da177e4
LT		 2112 int status;
2113
1da177e4 2114 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2115 if (status == 0)
2116 status = nfs4_server_capabilities(server, fhandle);
2117 if (status == 0)
2118 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2119 return nfs4_map_errors(status);
1da177e4
LT		 2120}
2121
6b97fd3d
MN		 2122/*
2123 * Get locations and (maybe) other attributes of a referral.
2124 * Note that we'll actually follow the referral later when
2125 * we detect fsid mismatch in inode revalidation
2126 */
56659e99 2127static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2128{
2129 int status = -ENOMEM;
2130 struct page *page = NULL;
2131 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2132
2133 page = alloc_page(GFP_KERNEL);
2134 if (page == NULL)
2135 goto out;
2136 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2137 if (locations == NULL)
2138 goto out;
2139
c228fd3a 2140 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2141 if (status != 0)
2142 goto out;
2143 /* Make sure server returned a different fsid for the referral */
2144 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2145 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2146 status = -EIO;
2147 goto out;
2148 }
2149
2150 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2151 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2152 if (!fattr->mode)
2153 fattr->mode = S_IFDIR;
2154 memset(fhandle, 0, sizeof(struct nfs_fh));
2155out:
2156 if (page)
2157 __free_page(page);
2158 if (locations)
2159 kfree(locations);
2160 return status;
2161}
2162
1da177e4
LT		 2163static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2164{
2165 struct nfs4_getattr_arg args = {
2166 .fh = fhandle,
2167 .bitmask = server->attr_bitmask,
2168 };
2169 struct nfs4_getattr_res res = {
2170 .fattr = fattr,
2171 .server = server,
2172 };
2173 struct rpc_message msg = {
2174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2175 .rpc_argp = &args,
2176 .rpc_resp = &res,
2177 };
2178
0e574af1 2179 nfs_fattr_init(fattr);
cccef3b9 2180 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2181}
2182
2183static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2184{
2185 struct nfs4_exception exception = { };
2186 int err;
2187 do {
2188 err = nfs4_handle_exception(server,
2189 _nfs4_proc_getattr(server, fhandle, fattr),
2190 &exception);
2191 } while (exception.retry);
2192 return err;
2193}
2194
2195/*
2196 * The file is not closed if it is opened due to the a request to change
2197 * the size of the file. The open call will not be needed once the
2198 * VFS layer lookup-intents are implemented.
2199 *
2200 * Close is called when the inode is destroyed.
2201 * If we haven't opened the file for O_WRONLY, we
2202 * need to in the size_change case to obtain a stateid.
2203 *
2204 * Got race?
2205 * Because OPEN is always done by name in nfsv4, it is
2206 * possible that we opened a different file by the same
2207 * name. We can recognize this race condition, but we
2208 * can't do anything about it besides returning an error.
2209 *
2210 * This will be fixed with VFS changes (lookup-intent).
2211 */
2212static int
2213nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2214 struct iattr *sattr)
2215{
08e9eac4 2216 struct inode *inode = dentry->d_inode;
659bfcd6 2217 struct rpc_cred *cred = NULL;
d530838b 2218 struct nfs4_state *state = NULL;
1da177e4
LT		 2219 int status;
2220
0e574af1 2221 nfs_fattr_init(fattr);
1da177e4 2222
d530838b 2223 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2224 if (sattr->ia_valid & ATTR_FILE) {
2225 struct nfs_open_context *ctx;
2226
2227 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2228 if (ctx) {
2229 cred = ctx->cred;
2230 state = ctx->state;
2231 }
659bfcd6 2232 }
08e9eac4 2233
659bfcd6 2234 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2235 if (status == 0)
2236 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2237 return status;
2238}
2239
56659e99
TM		 2240static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2241 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2242 struct nfs_fattr *fattr)
2243{
2244 int status;
2245 struct nfs4_lookup_arg args = {
2246 .bitmask = server->attr_bitmask,
2247 .dir_fh = dirfh,
2248 .name = name,
2249 };
2250 struct nfs4_lookup_res res = {
2251 .server = server,
2252 .fattr = fattr,
2253 .fh = fhandle,
2254 };
2255 struct rpc_message msg = {
2256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2257 .rpc_argp = &args,
2258 .rpc_resp = &res,
2259 };
2260
2261 nfs_fattr_init(fattr);
2262
2263 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2264 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2265 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2266 return status;
2267}
2268
2269static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2270 struct qstr *name, struct nfs_fh *fhandle,
2271 struct nfs_fattr *fattr)
2272{
2273 struct nfs4_exception exception = { };
2274 int err;
2275 do {
4e56e082
TM		 2276 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2277 /* FIXME: !!!! */
2278 if (err == -NFS4ERR_MOVED) {
2279 err = -EREMOTE;
2280 break;
2281 }
2282 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2283 } while (exception.retry);
2284 return err;
2285}
2286
56659e99 2287static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2288 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2289{
4e56e082 2290 int status;
1da177e4
LT		 2291
2292 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2293 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2294 if (status == -NFS4ERR_MOVED)
2295 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2296 dprintk("NFS reply lookup: %d\n", status);
2297 return status;
2298}
2299
2300static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2301{
2302 struct nfs4_exception exception = { };
2303 int err;
2304 do {
2305 err = nfs4_handle_exception(NFS_SERVER(dir),
2306 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2307 &exception);
2308 } while (exception.retry);
2309 return err;
2310}
2311
2312static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2313{
76b32999
TM		 2314 struct nfs_server *server = NFS_SERVER(inode);
2315 struct nfs_fattr fattr;
1da177e4
LT		 2316 struct nfs4_accessargs args = {
2317 .fh = NFS_FH(inode),
76b32999
TM		 2318 .bitmask = server->attr_bitmask,
2319 };
2320 struct nfs4_accessres res = {
2321 .server = server,
2322 .fattr = &fattr,
1da177e4 2323 };
1da177e4
LT		 2324 struct rpc_message msg = {
2325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2326 .rpc_argp = &args,
2327 .rpc_resp = &res,
2328 .rpc_cred = entry->cred,
2329 };
2330 int mode = entry->mask;
2331 int status;
2332
2333 /*
2334 * Determine which access bits we want to ask for...
2335 */
2336 if (mode & MAY_READ)
2337 args.access |= NFS4_ACCESS_READ;
2338 if (S_ISDIR(inode->i_mode)) {
2339 if (mode & MAY_WRITE)
2340 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2341 if (mode & MAY_EXEC)
2342 args.access |= NFS4_ACCESS_LOOKUP;
2343 } else {
2344 if (mode & MAY_WRITE)
2345 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2346 if (mode & MAY_EXEC)
2347 args.access |= NFS4_ACCESS_EXECUTE;
2348 }
76b32999 2349 nfs_fattr_init(&fattr);
cccef3b9 2350 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2351 if (!status) {
2352 entry->mask = 0;
2353 if (res.access & NFS4_ACCESS_READ)
2354 entry->mask |= MAY_READ;
2355 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2356 entry->mask |= MAY_WRITE;
2357 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2358 entry->mask |= MAY_EXEC;
76b32999 2359 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2360 }
2361 return status;
2362}
2363
2364static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2365{
2366 struct nfs4_exception exception = { };
2367 int err;
2368 do {
2369 err = nfs4_handle_exception(NFS_SERVER(inode),
2370 _nfs4_proc_access(inode, entry),
2371 &exception);
2372 } while (exception.retry);
2373 return err;
2374}
2375
2376/*
2377 * TODO: For the time being, we don't try to get any attributes
2378 * along with any of the zero-copy operations READ, READDIR,
2379 * READLINK, WRITE.
2380 *
2381 * In the case of the first three, we want to put the GETATTR
2382 * after the read-type operation -- this is because it is hard
2383 * to predict the length of a GETATTR response in v4, and thus
2384 * align the READ data correctly. This means that the GETATTR
2385 * may end up partially falling into the page cache, and we should
2386 * shift it into the 'tail' of the xdr_buf before processing.
2387 * To do this efficiently, we need to know the total length
2388 * of data received, which doesn't seem to be available outside
2389 * of the RPC layer.
2390 *
2391 * In the case of WRITE, we also want to put the GETATTR after
2392 * the operation -- in this case because we want to make sure
2393 * we get the post-operation mtime and size. This means that
2394 * we can't use xdr_encode_pages() as written: we need a variant
2395 * of it which would leave room in the 'tail' iovec.
2396 *
2397 * Both of these changes to the XDR layer would in fact be quite
2398 * minor, but I decided to leave them for a subsequent patch.
2399 */
2400static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2401 unsigned int pgbase, unsigned int pglen)
2402{
2403 struct nfs4_readlink args = {
2404 .fh = NFS_FH(inode),
2405 .pgbase = pgbase,
2406 .pglen = pglen,
2407 .pages = &page,
2408 };
f50c7000 2409 struct nfs4_readlink_res res;
1da177e4
LT		 2410 struct rpc_message msg = {
2411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2412 .rpc_argp = &args,
f50c7000 2413 .rpc_resp = &res,
1da177e4
LT		 2414 };
2415
cccef3b9 2416 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2417}
2418
2419static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2420 unsigned int pgbase, unsigned int pglen)
2421{
2422 struct nfs4_exception exception = { };
2423 int err;
2424 do {
2425 err = nfs4_handle_exception(NFS_SERVER(inode),
2426 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2427 &exception);
2428 } while (exception.retry);
2429 return err;
2430}
2431
1da177e4
LT		 2432/*
2433 * Got race?
2434 * We will need to arrange for the VFS layer to provide an atomic open.
2435 * Until then, this create/open method is prone to inefficiency and race
2436 * conditions due to the lookup, create, and open VFS calls from sys_open()
2437 * placed on the wire.
2438 *
2439 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2440 * The file will be opened again in the subsequent VFS open call
2441 * (nfs4_proc_file_open).
2442 *
2443 * The open for read will just hang around to be used by any process that
2444 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2445 */
2446
2447static int
2448nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2449 int flags, struct nameidata *nd)
1da177e4 2450{
ad389da7 2451 struct path path = {
4ac91378 2452 .mnt = nd->path.mnt,
ad389da7
TM		 2453 .dentry = dentry,
2454 };
1da177e4
LT		 2455 struct nfs4_state *state;
2456 struct rpc_cred *cred;
dc0b027d 2457 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2458 int status = 0;
2459
98a8e323 2460 cred = rpc_lookup_cred();
1da177e4
LT		 2461 if (IS_ERR(cred)) {
2462 status = PTR_ERR(cred);
2463 goto out;
2464 }
dc0b027d 2465 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2466 d_drop(dentry);
1da177e4
LT		 2467 if (IS_ERR(state)) {
2468 status = PTR_ERR(state);
659bfcd6 2469 goto out_putcred;
1da177e4 2470 }
d4d9cdcb 2471 d_add(dentry, igrab(state->inode));
d75340cc 2472 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2473 if (flags & O_EXCL) {
2474 struct nfs_fattr fattr;
659bfcd6 2475 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2476 if (status == 0)
65e4308d 2477 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2478 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2479 }
ad389da7 2480 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2481 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2482 else
dc0b027d 2483 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2484out_putcred:
2485 put_rpccred(cred);
1da177e4
LT		 2486out:
2487 return status;
2488}
2489
2490static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2491{
16e42959 2492 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2493 struct nfs_removeargs args = {
1da177e4 2494 .fh = NFS_FH(dir),
4fdc17b2
TM		 2495 .name.len = name->len,
2496 .name.name = name->name,
16e42959
TM		 2497 .bitmask = server->attr_bitmask,
2498 };
4fdc17b2 2499 struct nfs_removeres res = {
16e42959 2500 .server = server,
1da177e4 2501 };
1da177e4 2502 struct rpc_message msg = {
4fdc17b2
TM		 2503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2504 .rpc_argp = &args,
2505 .rpc_resp = &res,
1da177e4
LT		 2506 };
2507 int status;
2508
4fdc17b2 2509 nfs_fattr_init(&res.dir_attr);
cccef3b9 2510 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2511 if (status == 0) {
2512 update_changeattr(dir, &res.cinfo);
4fdc17b2 2513 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2514 }
1da177e4
LT		 2515 return status;
2516}
2517
2518static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2519{
2520 struct nfs4_exception exception = { };
2521 int err;
2522 do {
2523 err = nfs4_handle_exception(NFS_SERVER(dir),
2524 _nfs4_proc_remove(dir, name),
2525 &exception);
2526 } while (exception.retry);
2527 return err;
2528}
2529
e4eff1a6 2530static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2531{
e4eff1a6
TM		 2532 struct nfs_server *server = NFS_SERVER(dir);
2533 struct nfs_removeargs *args = msg->rpc_argp;
2534 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2535
a65318bf 2536 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2537 res->server = server;
1da177e4 2538 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2539}
2540
e4eff1a6 2541static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2542{
e4eff1a6
TM		 2543 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2544
472cfbd9 2545 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2546 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2547 return 0;
472cfbd9 2548 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2549 update_changeattr(dir, &res->cinfo);
2550 nfs_post_op_update_inode(dir, &res->dir_attr);
2551 return 1;
1da177e4
LT		 2552}
2553
2554static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2555 struct inode *new_dir, struct qstr *new_name)
2556{
6caf2c82 2557 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2558 struct nfs4_rename_arg arg = {
2559 .old_dir = NFS_FH(old_dir),
2560 .new_dir = NFS_FH(new_dir),
2561 .old_name = old_name,
2562 .new_name = new_name,
6caf2c82
TM		 2563 .bitmask = server->attr_bitmask,
2564 };
2565 struct nfs_fattr old_fattr, new_fattr;
2566 struct nfs4_rename_res res = {
2567 .server = server,
2568 .old_fattr = &old_fattr,
2569 .new_fattr = &new_fattr,
1da177e4 2570 };
1da177e4
LT		 2571 struct rpc_message msg = {
2572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2573 .rpc_argp = &arg,
2574 .rpc_resp = &res,
2575 };
2576 int status;
2577
6caf2c82
TM		 2578 nfs_fattr_init(res.old_fattr);
2579 nfs_fattr_init(res.new_fattr);
cccef3b9 2580 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2581
2582 if (!status) {
2583 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2584 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2585 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2586 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2587 }
2588 return status;
2589}
2590
2591static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2592 struct inode *new_dir, struct qstr *new_name)
2593{
2594 struct nfs4_exception exception = { };
2595 int err;
2596 do {
2597 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2598 _nfs4_proc_rename(old_dir, old_name,
2599 new_dir, new_name),
2600 &exception);
2601 } while (exception.retry);
2602 return err;
2603}
2604
2605static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2606{
91ba2eee 2607 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2608 struct nfs4_link_arg arg = {
2609 .fh = NFS_FH(inode),
2610 .dir_fh = NFS_FH(dir),
2611 .name = name,
91ba2eee
TM		 2612 .bitmask = server->attr_bitmask,
2613 };
2614 struct nfs_fattr fattr, dir_attr;
2615 struct nfs4_link_res res = {
2616 .server = server,
2617 .fattr = &fattr,
2618 .dir_attr = &dir_attr,
1da177e4 2619 };
1da177e4
LT		 2620 struct rpc_message msg = {
2621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2622 .rpc_argp = &arg,
91ba2eee 2623 .rpc_resp = &res,
1da177e4
LT		 2624 };
2625 int status;
2626
91ba2eee
TM		 2627 nfs_fattr_init(res.fattr);
2628 nfs_fattr_init(res.dir_attr);
cccef3b9 2629 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2630 if (!status) {
2631 update_changeattr(dir, &res.cinfo);
2632 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2633 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2634 }
1da177e4
LT		 2635
2636 return status;
2637}
2638
2639static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2640{
2641 struct nfs4_exception exception = { };
2642 int err;
2643 do {
2644 err = nfs4_handle_exception(NFS_SERVER(inode),
2645 _nfs4_proc_link(inode, dir, name),
2646 &exception);
2647 } while (exception.retry);
2648 return err;
2649}
2650
57dc9a57
TM		 2651struct nfs4_createdata {
2652 struct rpc_message msg;
2653 struct nfs4_create_arg arg;
2654 struct nfs4_create_res res;
2655 struct nfs_fh fh;
2656 struct nfs_fattr fattr;
2657 struct nfs_fattr dir_fattr;
2658};
2659
2660static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2661 struct qstr *name, struct iattr *sattr, u32 ftype)
2662{
2663 struct nfs4_createdata *data;
2664
2665 data = kzalloc(sizeof(*data), GFP_KERNEL);
2666 if (data != NULL) {
2667 struct nfs_server *server = NFS_SERVER(dir);
2668
2669 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2670 data->msg.rpc_argp = &data->arg;
2671 data->msg.rpc_resp = &data->res;
2672 data->arg.dir_fh = NFS_FH(dir);
2673 data->arg.server = server;
2674 data->arg.name = name;
2675 data->arg.attrs = sattr;
2676 data->arg.ftype = ftype;
2677 data->arg.bitmask = server->attr_bitmask;
2678 data->res.server = server;
2679 data->res.fh = &data->fh;
2680 data->res.fattr = &data->fattr;
2681 data->res.dir_fattr = &data->dir_fattr;
2682 nfs_fattr_init(data->res.fattr);
2683 nfs_fattr_init(data->res.dir_fattr);
2684 }
2685 return data;
2686}
2687
2688static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2689{
cccef3b9
AA		 2690 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2691 &data->arg, &data->res, 1);
57dc9a57
TM		 2692 if (status == 0) {
2693 update_changeattr(dir, &data->res.dir_cinfo);
2694 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2695 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2696 }
2697 return status;
2698}
2699
2700static void nfs4_free_createdata(struct nfs4_createdata *data)
2701{
2702 kfree(data);
2703}
2704
4f390c15 2705static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2706 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2707{
57dc9a57
TM		 2708 struct nfs4_createdata *data;
2709 int status = -ENAMETOOLONG;
1da177e4 2710
94a6d753 2711 if (len > NFS4_MAXPATHLEN)
57dc9a57 2712 goto out;
4f390c15 2713
57dc9a57
TM		 2714 status = -ENOMEM;
2715 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2716 if (data == NULL)
2717 goto out;
2718
2719 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2720 data->arg.u.symlink.pages = &page;
2721 data->arg.u.symlink.len = len;
1da177e4 2722
57dc9a57
TM		 2723 status = nfs4_do_create(dir, dentry, data);
2724
2725 nfs4_free_createdata(data);
2726out:
1da177e4
LT		 2727 return status;
2728}
2729
4f390c15 2730static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2731 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2732{
2733 struct nfs4_exception exception = { };
2734 int err;
2735 do {
2736 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2737 _nfs4_proc_symlink(dir, dentry, page,
2738 len, sattr),
1da177e4
LT		 2739 &exception);
2740 } while (exception.retry);
2741 return err;
2742}
2743
2744static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2745 struct iattr *sattr)
2746{
57dc9a57
TM		 2747 struct nfs4_createdata *data;
2748 int status = -ENOMEM;
1da177e4 2749
57dc9a57
TM		 2750 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2751 if (data == NULL)
2752 goto out;
2753
2754 status = nfs4_do_create(dir, dentry, data);
2755
2756 nfs4_free_createdata(data);
2757out:
1da177e4
LT		 2758 return status;
2759}
2760
2761static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2762 struct iattr *sattr)
2763{
2764 struct nfs4_exception exception = { };
2765 int err;
2766 do {
2767 err = nfs4_handle_exception(NFS_SERVER(dir),
2768 _nfs4_proc_mkdir(dir, dentry, sattr),
2769 &exception);
2770 } while (exception.retry);
2771 return err;
2772}
2773
2774static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2775 u64 cookie, struct page *page, unsigned int count, int plus)
2776{
2777 struct inode *dir = dentry->d_inode;
2778 struct nfs4_readdir_arg args = {
2779 .fh = NFS_FH(dir),
2780 .pages = &page,
2781 .pgbase = 0,
2782 .count = count,
96d25e53 2783 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
1da177e4
LT		 2784 };
2785 struct nfs4_readdir_res res;
2786 struct rpc_message msg = {
2787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2788 .rpc_argp = &args,
2789 .rpc_resp = &res,
2790 .rpc_cred = cred,
2791 };
2792 int status;
2793
3110ff80 2794 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2795 dentry->d_parent->d_name.name,
2796 dentry->d_name.name,
2797 (unsigned long long)cookie);
1da177e4
LT		 2798 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2799 res.pgbase = args.pgbase;
cccef3b9 2800 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2801 if (status == 0)
2802 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2803
2804 nfs_invalidate_atime(dir);
2805
3110ff80 2806 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2807 return status;
2808}
2809
2810static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2811 u64 cookie, struct page *page, unsigned int count, int plus)
2812{
2813 struct nfs4_exception exception = { };
2814 int err;
2815 do {
2816 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2817 _nfs4_proc_readdir(dentry, cred, cookie,
2818 page, count, plus),
2819 &exception);
2820 } while (exception.retry);
2821 return err;
2822}
2823
2824static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2825 struct iattr *sattr, dev_t rdev)
2826{
57dc9a57
TM		 2827 struct nfs4_createdata *data;
2828 int mode = sattr->ia_mode;
2829 int status = -ENOMEM;
1da177e4
LT		 2830
2831 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2832 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2833
2834 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2835 if (data == NULL)
2836 goto out;
2837
1da177e4 2838 if (S_ISFIFO(mode))
57dc9a57 2839 data->arg.ftype = NF4FIFO;
1da177e4 2840 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2841 data->arg.ftype = NF4BLK;
2842 data->arg.u.device.specdata1 = MAJOR(rdev);
2843 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2844 }
2845 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2846 data->arg.ftype = NF4CHR;
2847 data->arg.u.device.specdata1 = MAJOR(rdev);
2848 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2849 }
1da177e4 2850
57dc9a57
TM		 2851 status = nfs4_do_create(dir, dentry, data);
2852
2853 nfs4_free_createdata(data);
2854out:
1da177e4
LT		 2855 return status;
2856}
2857
2858static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2859 struct iattr *sattr, dev_t rdev)
2860{
2861 struct nfs4_exception exception = { };
2862 int err;
2863 do {
2864 err = nfs4_handle_exception(NFS_SERVER(dir),
2865 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2866 &exception);
2867 } while (exception.retry);
2868 return err;
2869}
2870
2871static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2872 struct nfs_fsstat *fsstat)
2873{
2874 struct nfs4_statfs_arg args = {
2875 .fh = fhandle,
2876 .bitmask = server->attr_bitmask,
2877 };
24ad148a
BH		 2878 struct nfs4_statfs_res res = {
2879 .fsstat = fsstat,
2880 };
1da177e4
LT		 2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2883 .rpc_argp = &args,
24ad148a 2884 .rpc_resp = &res,
1da177e4
LT		 2885 };
2886
0e574af1 2887 nfs_fattr_init(fsstat->fattr);
cccef3b9 2888 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2889}
2890
2891static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2892{
2893 struct nfs4_exception exception = { };
2894 int err;
2895 do {
2896 err = nfs4_handle_exception(server,
2897 _nfs4_proc_statfs(server, fhandle, fsstat),
2898 &exception);
2899 } while (exception.retry);
2900 return err;
2901}
2902
2903static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2904 struct nfs_fsinfo *fsinfo)
2905{
2906 struct nfs4_fsinfo_arg args = {
2907 .fh = fhandle,
2908 .bitmask = server->attr_bitmask,
2909 };
3dda5e43
BH		 2910 struct nfs4_fsinfo_res res = {
2911 .fsinfo = fsinfo,
2912 };
1da177e4
LT		 2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2915 .rpc_argp = &args,
3dda5e43 2916 .rpc_resp = &res,
1da177e4
LT		 2917 };
2918
cccef3b9 2919 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2920}
2921
2922static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2923{
2924 struct nfs4_exception exception = { };
2925 int err;
2926
2927 do {
2928 err = nfs4_handle_exception(server,
2929 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2930 &exception);
2931 } while (exception.retry);
2932 return err;
2933}
2934
2935static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2936{
0e574af1 2937 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2938 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2939}
2940
2941static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2942 struct nfs_pathconf *pathconf)
2943{
2944 struct nfs4_pathconf_arg args = {
2945 .fh = fhandle,
2946 .bitmask = server->attr_bitmask,
2947 };
d45b2989
BH		 2948 struct nfs4_pathconf_res res = {
2949 .pathconf = pathconf,
2950 };
1da177e4
LT		 2951 struct rpc_message msg = {
2952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2953 .rpc_argp = &args,
d45b2989 2954 .rpc_resp = &res,
1da177e4
LT		 2955 };
2956
2957 /* None of the pathconf attributes are mandatory to implement */
2958 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2959 memset(pathconf, 0, sizeof(*pathconf));
2960 return 0;
2961 }
2962
0e574af1 2963 nfs_fattr_init(pathconf->fattr);
cccef3b9 2964 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2965}
2966
2967static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2968 struct nfs_pathconf *pathconf)
2969{
2970 struct nfs4_exception exception = { };
2971 int err;
2972
2973 do {
2974 err = nfs4_handle_exception(server,
2975 _nfs4_proc_pathconf(server, fhandle, pathconf),
2976 &exception);
2977 } while (exception.retry);
2978 return err;
2979}
2980
ec06c096 2981static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2982{
ec06c096 2983 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2984
f11c88af
AA		 2985 dprintk("--> %s\n", __func__);
2986
2987 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2988 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2989
9e33bed5 2990 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2991 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2992 return -EAGAIN;
1da177e4 2993 }
8850df99
TM		 2994
2995 nfs_invalidate_atime(data->inode);
1da177e4 2996 if (task->tk_status > 0)
ec06c096
TM		 2997 renew_lease(server, data->timestamp);
2998 return 0;
1da177e4
LT		 2999}
3000
bdc7f021 3001static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3002{
1da177e4 3003 data->timestamp = jiffies;
bdc7f021 3004 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 3005}
3006
788e7a89 3007static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3008{
1da177e4
LT		 3009 struct inode *inode = data->inode;
3010
def6ed7e
AA		 3011 /* slot is freed in nfs_writeback_done */
3012 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3013 task->tk_status);
3014
9e33bed5 3015 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 3016 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3017 return -EAGAIN;
1da177e4 3018 }
4f9838c7 3019 if (task->tk_status >= 0) {
1da177e4 3020 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3021 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3022 }
788e7a89 3023 return 0;
1da177e4
LT		 3024}
3025
bdc7f021 3026static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3027{
bdc7f021
TM		 3028 struct nfs_server *server = NFS_SERVER(data->inode);
3029
a65318bf 3030 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3031 data->res.server = server;
1da177e4
LT		 3032 data->timestamp = jiffies;
3033
bdc7f021 3034 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3035}
3036
788e7a89 3037static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3038{
1da177e4
LT		 3039 struct inode *inode = data->inode;
3040
21d9a851
AA		 3041 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3042 task->tk_status);
9e33bed5 3043 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3044 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3045 return -EAGAIN;
1da177e4 3046 }
21d9a851
AA		 3047 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3048 &data->res.seq_res);
9e08a3c5 3049 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3050 return 0;
1da177e4
LT		 3051}
3052
bdc7f021 3053static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3054{
788e7a89 3055 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3056
a65318bf 3057 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3058 data->res.server = server;
bdc7f021 3059 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3060}
3061
3062/*
3063 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3064 * standalone procedure for queueing an asynchronous RENEW.
3065 */
963d8fe5 3066static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3067{
adfa6f98 3068 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3069 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3070
3071 if (task->tk_status < 0) {
95baa25c
TM		 3072 /* Unless we're shutting down, schedule state recovery! */
3073 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3074 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3075 return;
3076 }
3077 spin_lock(&clp->cl_lock);
3078 if (time_before(clp->cl_last_renewal,timestamp))
3079 clp->cl_last_renewal = timestamp;
3080 spin_unlock(&clp->cl_lock);
3081}
3082
963d8fe5
TM		 3083static const struct rpc_call_ops nfs4_renew_ops = {
3084 .rpc_call_done = nfs4_renew_done,
3085};
3086
adfa6f98 3087int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3088{
3089 struct rpc_message msg = {
3090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3091 .rpc_argp = clp,
b4454fe1 3092 .rpc_cred = cred,
1da177e4
LT		 3093 };
3094
3095 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3096 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3097}
3098
adfa6f98 3099int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3100{
3101 struct rpc_message msg = {
3102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3103 .rpc_argp = clp,
b4454fe1 3104 .rpc_cred = cred,
1da177e4
LT		 3105 };
3106 unsigned long now = jiffies;
3107 int status;
3108
3109 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3110 if (status < 0)
3111 return status;
3112 spin_lock(&clp->cl_lock);
3113 if (time_before(clp->cl_last_renewal,now))
3114 clp->cl_last_renewal = now;
3115 spin_unlock(&clp->cl_lock);
3116 return 0;
3117}
3118
aa1870af
BF		 3119static inline int nfs4_server_supports_acls(struct nfs_server *server)
3120{
3121 return (server->caps & NFS_CAP_ACLS)
3122 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3123 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3124}
3125
3126/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3127 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3128 * the stack.
3129 */
3130#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3131
3132static void buf_to_pages(const void *buf, size_t buflen,
3133 struct page **pages, unsigned int *pgbase)
3134{
3135 const void *p = buf;
3136
3137 *pgbase = offset_in_page(buf);
3138 p -= *pgbase;
3139 while (p < buf + buflen) {
3140 *(pages++) = virt_to_page(p);
3141 p += PAGE_CACHE_SIZE;
3142 }
3143}
3144
e50a1c2e
BF		 3145struct nfs4_cached_acl {
3146 int cached;
3147 size_t len;
3e9d4154 3148 char data[0];
e50a1c2e
BF		 3149};
3150
3151static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3152{
3153 struct nfs_inode *nfsi = NFS_I(inode);
3154
3155 spin_lock(&inode->i_lock);
3156 kfree(nfsi->nfs4_acl);
3157 nfsi->nfs4_acl = acl;
3158 spin_unlock(&inode->i_lock);
3159}
3160
3161static void nfs4_zap_acl_attr(struct inode *inode)
3162{
3163 nfs4_set_cached_acl(inode, NULL);
3164}
3165
3166static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3167{
3168 struct nfs_inode *nfsi = NFS_I(inode);
3169 struct nfs4_cached_acl *acl;
3170 int ret = -ENOENT;
3171
3172 spin_lock(&inode->i_lock);
3173 acl = nfsi->nfs4_acl;
3174 if (acl == NULL)
3175 goto out;
3176 if (buf == NULL) /* user is just asking for length */
3177 goto out_len;
3178 if (acl->cached == 0)
3179 goto out;
3180 ret = -ERANGE; /* see getxattr(2) man page */
3181 if (acl->len > buflen)
3182 goto out;
3183 memcpy(buf, acl->data, acl->len);
3184out_len:
3185 ret = acl->len;
3186out:
3187 spin_unlock(&inode->i_lock);
3188 return ret;
3189}
3190
3191static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3192{
3193 struct nfs4_cached_acl *acl;
3194
3195 if (buf && acl_len <= PAGE_SIZE) {
3196 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3197 if (acl == NULL)
3198 goto out;
3199 acl->cached = 1;
3200 memcpy(acl->data, buf, acl_len);
3201 } else {
3202 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3203 if (acl == NULL)
3204 goto out;
3205 acl->cached = 0;
3206 }
3207 acl->len = acl_len;
3208out:
3209 nfs4_set_cached_acl(inode, acl);
3210}
3211
16b4289c 3212static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3213{
aa1870af
BF		 3214 struct page *pages[NFS4ACL_MAXPAGES];
3215 struct nfs_getaclargs args = {
3216 .fh = NFS_FH(inode),
3217 .acl_pages = pages,
3218 .acl_len = buflen,
3219 };
663c79b3
BH		 3220 struct nfs_getaclres res = {
3221 .acl_len = buflen,
3222 };
e50a1c2e 3223 void *resp_buf;
aa1870af
BF		 3224 struct rpc_message msg = {
3225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3226 .rpc_argp = &args,
663c79b3 3227 .rpc_resp = &res,
aa1870af 3228 };
e50a1c2e 3229 struct page *localpage = NULL;
aa1870af
BF		 3230 int ret;
3231
e50a1c2e
BF		 3232 if (buflen < PAGE_SIZE) {
3233 /* As long as we're doing a round trip to the server anyway,
3234 * let's be prepared for a page of acl data. */
3235 localpage = alloc_page(GFP_KERNEL);
3236 resp_buf = page_address(localpage);
3237 if (localpage == NULL)
3238 return -ENOMEM;
3239 args.acl_pages[0] = localpage;
3240 args.acl_pgbase = 0;
663c79b3 3241 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3242 } else {
3243 resp_buf = buf;
3244 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3245 }
cccef3b9 3246 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3247 if (ret)
3248 goto out_free;
663c79b3
BH		 3249 if (res.acl_len > args.acl_len)
3250 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3251 else
663c79b3 3252 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3253 if (buf) {
3254 ret = -ERANGE;
663c79b3 3255 if (res.acl_len > buflen)
e50a1c2e
BF		 3256 goto out_free;
3257 if (localpage)
663c79b3 3258 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3259 }
663c79b3 3260 ret = res.acl_len;
e50a1c2e
BF		 3261out_free:
3262 if (localpage)
3263 __free_page(localpage);
aa1870af
BF		 3264 return ret;
3265}
3266
16b4289c
TM		 3267static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3268{
3269 struct nfs4_exception exception = { };
3270 ssize_t ret;
3271 do {
3272 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3273 if (ret >= 0)
3274 break;
3275 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3276 } while (exception.retry);
3277 return ret;
3278}
3279
e50a1c2e
BF		 3280static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3281{
3282 struct nfs_server *server = NFS_SERVER(inode);
3283 int ret;
3284
3285 if (!nfs4_server_supports_acls(server))
3286 return -EOPNOTSUPP;
3287 ret = nfs_revalidate_inode(server, inode);
3288 if (ret < 0)
3289 return ret;
3290 ret = nfs4_read_cached_acl(inode, buf, buflen);
3291 if (ret != -ENOENT)
3292 return ret;
3293 return nfs4_get_acl_uncached(inode, buf, buflen);
3294}
3295
16b4289c 3296static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3297{
3298 struct nfs_server *server = NFS_SERVER(inode);
3299 struct page *pages[NFS4ACL_MAXPAGES];
3300 struct nfs_setaclargs arg = {
3301 .fh = NFS_FH(inode),
3302 .acl_pages = pages,
3303 .acl_len = buflen,
3304 };
73c403a9 3305 struct nfs_setaclres res;
4b580ee3
BF		 3306 struct rpc_message msg = {
3307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3308 .rpc_argp = &arg,
73c403a9 3309 .rpc_resp = &res,
4b580ee3
BF		 3310 };
3311 int ret;
3312
3313 if (!nfs4_server_supports_acls(server))
3314 return -EOPNOTSUPP;
642ac549 3315 nfs_inode_return_delegation(inode);
4b580ee3 3316 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3317 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3318 nfs_access_zap_cache(inode);
3319 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3320 return ret;
3321}
3322
16b4289c
TM		 3323static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3324{
3325 struct nfs4_exception exception = { };
3326 int err;
3327 do {
3328 err = nfs4_handle_exception(NFS_SERVER(inode),
3329 __nfs4_proc_set_acl(inode, buf, buflen),
3330 &exception);
3331 } while (exception.retry);
3332 return err;
3333}
3334
1da177e4 3335static int
8328d59f 3336_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3337{
1da177e4
LT		 3338 if (!clp || task->tk_status >= 0)
3339 return 0;
3340 switch(task->tk_status) {
9e33bed5
TM		 3341 case -NFS4ERR_ADMIN_REVOKED:
3342 case -NFS4ERR_BAD_STATEID:
3343 case -NFS4ERR_OPENMODE:
3344 if (state == NULL)
3345 break;
3346 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3347 case -NFS4ERR_STALE_CLIENTID:
3348 case -NFS4ERR_STALE_STATEID:
3349 case -NFS4ERR_EXPIRED:
5d00837b 3350 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3351 nfs4_schedule_state_recovery(clp);
e005e804 3352 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3353 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3354 task->tk_status = 0;
3355 return -EAGAIN;
4745e315
AA		 3356#if defined(CONFIG_NFS_V4_1)
3357 case -NFS4ERR_BADSESSION:
3358 case -NFS4ERR_BADSLOT:
3359 case -NFS4ERR_BAD_HIGH_SLOT:
3360 case -NFS4ERR_DEADSESSION:
3361 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3362 case -NFS4ERR_SEQ_FALSE_RETRY:
3363 case -NFS4ERR_SEQ_MISORDERED:
3364 dprintk("%s ERROR %d, Reset session\n", __func__,
3365 task->tk_status);
3366 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3367 task->tk_status = 0;
3368 return -EAGAIN;
3369#endif /* CONFIG_NFS_V4_1 */
1da177e4 3370 case -NFS4ERR_DELAY:
8328d59f
AA		 3371 if (server)
3372 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3373 case -NFS4ERR_GRACE:
1da177e4
LT		 3374 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3375 task->tk_status = 0;
3376 return -EAGAIN;
3377 case -NFS4ERR_OLD_STATEID:
3378 task->tk_status = 0;
3379 return -EAGAIN;
3380 }
3381 task->tk_status = nfs4_map_errors(task->tk_status);
3382 return 0;
3383}
3384
8328d59f
AA		 3385static int
3386nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3387{
3388 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3389}
3390
adfa6f98 3391int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3392{
3393 nfs4_verifier sc_verifier;
3394 struct nfs4_setclientid setclientid = {
3395 .sc_verifier = &sc_verifier,
3396 .sc_prog = program,
3397 };
3398 struct rpc_message msg = {
3399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3400 .rpc_argp = &setclientid,
3401 .rpc_resp = clp,
286d7d6a 3402 .rpc_cred = cred,
1da177e4 3403 };
bc4785cd 3404 __be32 *p;
1da177e4
LT		 3405 int loop = 0;
3406 int status;
3407
bc4785cd 3408 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3409 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3410 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3411
3412 for(;;) {
3413 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3414 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3415 clp->cl_ipaddr,
3416 rpc_peeraddr2str(clp->cl_rpcclient,
3417 RPC_DISPLAY_ADDR),
69dd716c
TM		 3418 rpc_peeraddr2str(clp->cl_rpcclient,
3419 RPC_DISPLAY_PROTO),
78ea323b 3420 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3421 clp->cl_id_uniquifier);
3422 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3423 sizeof(setclientid.sc_netid),
3424 rpc_peeraddr2str(clp->cl_rpcclient,
3425 RPC_DISPLAY_NETID));
1da177e4 3426 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3427 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3428 clp->cl_ipaddr, port >> 8, port & 255);
3429
3430 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3431 if (status != -NFS4ERR_CLID_INUSE)
3432 break;
3433 if (signalled())
3434 break;
3435 if (loop++ & 1)
3436 ssleep(clp->cl_lease_time + 1);
3437 else
3438 if (++clp->cl_id_uniquifier == 0)
3439 break;
3440 }
3441 return status;
3442}
3443
adfa6f98 3444static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3445{
3446 struct nfs_fsinfo fsinfo;
3447 struct rpc_message msg = {
3448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3449 .rpc_argp = clp,
3450 .rpc_resp = &fsinfo,
286d7d6a 3451 .rpc_cred = cred,
1da177e4
LT		 3452 };
3453 unsigned long now;
3454 int status;
3455
3456 now = jiffies;
3457 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3458 if (status == 0) {
3459 spin_lock(&clp->cl_lock);
3460 clp->cl_lease_time = fsinfo.lease_time * HZ;
3461 clp->cl_last_renewal = now;
3462 spin_unlock(&clp->cl_lock);
3463 }
3464 return status;
3465}
3466
adfa6f98 3467int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3468{
77e03677 3469 long timeout = 0;
51581f3b
TM		 3470 int err;
3471 do {
3472 err = _nfs4_proc_setclientid_confirm(clp, cred);
3473 switch (err) {
3474 case 0:
3475 return err;
3476 case -NFS4ERR_RESOURCE:
3477 /* The IBM lawyers misread another document! */
3478 case -NFS4ERR_DELAY:
3479 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3480 }
3481 } while (err == 0);
3482 return err;
3483}
3484
fe650407
TM		 3485struct nfs4_delegreturndata {
3486 struct nfs4_delegreturnargs args;
fa178f29 3487 struct nfs4_delegreturnres res;
fe650407
TM		 3488 struct nfs_fh fh;
3489 nfs4_stateid stateid;
26e976a8 3490 unsigned long timestamp;
fa178f29 3491 struct nfs_fattr fattr;
fe650407
TM		 3492 int rpc_status;
3493};
3494
fe650407
TM		 3495static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3496{
3497 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3498
3499 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3500 task->tk_status);
3501
fe650407 3502 data->rpc_status = task->tk_status;
26e976a8 3503 if (data->rpc_status == 0)
fa178f29 3504 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3505}
3506
3507static void nfs4_delegreturn_release(void *calldata)
3508{
fe650407
TM		 3509 kfree(calldata);
3510}
3511
938e1010
AA		 3512#if defined(CONFIG_NFS_V4_1)
3513static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3514{
3515 struct nfs4_delegreturndata *d_data;
3516
3517 d_data = (struct nfs4_delegreturndata *)data;
3518
3519 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3520 &d_data->args.seq_args,
3521 &d_data->res.seq_res, 1, task))
3522 return;
3523 rpc_call_start(task);
3524}
3525#endif /* CONFIG_NFS_V4_1 */
3526
c8d149f3 3527static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3528#if defined(CONFIG_NFS_V4_1)
3529 .rpc_call_prepare = nfs4_delegreturn_prepare,
3530#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3531 .rpc_call_done = nfs4_delegreturn_done,
3532 .rpc_release = nfs4_delegreturn_release,
3533};
3534
e6f81075 3535static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3536{
3537 struct nfs4_delegreturndata *data;
fa178f29 3538 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3539 struct rpc_task *task;
5138fde0
TM		 3540 struct rpc_message msg = {
3541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3542 .rpc_cred = cred,
3543 };
c970aa85
TM		 3544 struct rpc_task_setup task_setup_data = {
3545 .rpc_client = server->client,
5138fde0 3546 .rpc_message = &msg,
c970aa85
TM		 3547 .callback_ops = &nfs4_delegreturn_ops,
3548 .flags = RPC_TASK_ASYNC,
3549 };
e6f81075 3550 int status = 0;
fe650407 3551
938e1010 3552 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3553 if (data == NULL)
3554 return -ENOMEM;
3555 data->args.fhandle = &data->fh;
3556 data->args.stateid = &data->stateid;
fa178f29 3557 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3558 nfs_copy_fh(&data->fh, NFS_FH(inode));
3559 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3560 data->res.fattr = &data->fattr;
3561 data->res.server = server;
5f7dbd5c 3562 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3563 nfs_fattr_init(data->res.fattr);
26e976a8 3564 data->timestamp = jiffies;
fe650407
TM		 3565 data->rpc_status = 0;
3566
c970aa85 3567 task_setup_data.callback_data = data;
5138fde0
TM		 3568 msg.rpc_argp = &data->args,
3569 msg.rpc_resp = &data->res,
c970aa85 3570 task = rpc_run_task(&task_setup_data);
7a1218a2 3571 if (IS_ERR(task))
fe650407 3572 return PTR_ERR(task);
e6f81075
TM		 3573 if (!issync)
3574 goto out;
fe650407 3575 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3576 if (status != 0)
3577 goto out;
3578 status = data->rpc_status;
3579 if (status != 0)
3580 goto out;
3581 nfs_refresh_inode(inode, &data->fattr);
3582out:
e6b3c4db 3583 rpc_put_task(task);
fe650407 3584 return status;
1da177e4
LT		 3585}
3586
e6f81075 3587int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3588{
3589 struct nfs_server *server = NFS_SERVER(inode);
3590 struct nfs4_exception exception = { };
3591 int err;
3592 do {
e6f81075 3593 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3594 switch (err) {
3595 case -NFS4ERR_STALE_STATEID:
3596 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3597 case 0:
3598 return 0;
3599 }
3600 err = nfs4_handle_exception(server, err, &exception);
3601 } while (exception.retry);
3602 return err;
3603}
3604
3605#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3606#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3607
3608/*
3609 * sleep, with exponential backoff, and retry the LOCK operation.
3610 */
3611static unsigned long
3612nfs4_set_lock_task_retry(unsigned long timeout)
3613{
150030b7 3614 schedule_timeout_killable(timeout);
1da177e4
LT		 3615 timeout <<= 1;
3616 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3617 return NFS4_LOCK_MAXTIMEOUT;
3618 return timeout;
3619}
3620
1da177e4
LT		 3621static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3622{
3623 struct inode *inode = state->inode;
3624 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3625 struct nfs_client *clp = server->nfs_client;
911d1aaf 3626 struct nfs_lockt_args arg = {
1da177e4 3627 .fh = NFS_FH(inode),
911d1aaf 3628 .fl = request,
1da177e4 3629 };
911d1aaf
TM		 3630 struct nfs_lockt_res res = {
3631 .denied = request,
1da177e4
LT		 3632 };
3633 struct rpc_message msg = {
3634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3635 .rpc_argp = &arg,
3636 .rpc_resp = &res,
3637 .rpc_cred = state->owner->so_cred,
3638 };
1da177e4
LT		 3639 struct nfs4_lock_state *lsp;
3640 int status;
3641
911d1aaf 3642 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3643 status = nfs4_set_lock_state(state, request);
3644 if (status != 0)
3645 goto out;
3646 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3647 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3648 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3649 switch (status) {
3650 case 0:
3651 request->fl_type = F_UNLCK;
3652 break;
3653 case -NFS4ERR_DENIED:
3654 status = 0;
1da177e4 3655 }
70cc6487 3656 request->fl_ops->fl_release_private(request);
8d0a8a9d 3657out:
1da177e4
LT		 3658 return status;
3659}
3660
3661static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3662{
3663 struct nfs4_exception exception = { };
3664 int err;
3665
3666 do {
3667 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3668 _nfs4_proc_getlk(state, cmd, request),
3669 &exception);
3670 } while (exception.retry);
3671 return err;
3672}
3673
3674static int do_vfs_lock(struct file *file, struct file_lock *fl)
3675{
3676 int res = 0;
3677 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3678 case FL_POSIX:
3679 res = posix_lock_file_wait(file, fl);
3680 break;
3681 case FL_FLOCK:
3682 res = flock_lock_file_wait(file, fl);
3683 break;
3684 default:
3685 BUG();
3686 }
1da177e4
LT		 3687 return res;
3688}
3689
faf5f49c 3690struct nfs4_unlockdata {
911d1aaf
TM		 3691 struct nfs_locku_args arg;
3692 struct nfs_locku_res res;
faf5f49c
TM		 3693 struct nfs4_lock_state *lsp;
3694 struct nfs_open_context *ctx;
911d1aaf
TM		 3695 struct file_lock fl;
3696 const struct nfs_server *server;
26e976a8 3697 unsigned long timestamp;
faf5f49c
TM		 3698};
3699
911d1aaf
TM		 3700static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3701 struct nfs_open_context *ctx,
3702 struct nfs4_lock_state *lsp,
3703 struct nfs_seqid *seqid)
3704{
3705 struct nfs4_unlockdata *p;
3706 struct inode *inode = lsp->ls_state->inode;
3707
a893693c 3708 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3709 if (p == NULL)
3710 return NULL;
3711 p->arg.fh = NFS_FH(inode);
3712 p->arg.fl = &p->fl;
3713 p->arg.seqid = seqid;
c1d51931 3714 p->res.seqid = seqid;
5f7dbd5c 3715 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3716 p->arg.stateid = &lsp->ls_stateid;
3717 p->lsp = lsp;
3718 atomic_inc(&lsp->ls_count);
3719 /* Ensure we don't close file until we're done freeing locks! */
3720 p->ctx = get_nfs_open_context(ctx);
3721 memcpy(&p->fl, fl, sizeof(p->fl));
3722 p->server = NFS_SERVER(inode);
3723 return p;
3724}
3725
06f814a3 3726static void nfs4_locku_release_calldata(void *data)
faf5f49c 3727{
963d8fe5 3728 struct nfs4_unlockdata *calldata = data;
911d1aaf 3729 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3730 nfs4_put_lock_state(calldata->lsp);
3731 put_nfs_open_context(calldata->ctx);
3732 kfree(calldata);
faf5f49c
TM		 3733}
3734
963d8fe5 3735static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3736{
963d8fe5 3737 struct nfs4_unlockdata *calldata = data;
faf5f49c 3738
a893693c
AA		 3739 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3740 task->tk_status);
06f814a3
TM		 3741 if (RPC_ASSASSINATED(task))
3742 return;
faf5f49c
TM		 3743 switch (task->tk_status) {
3744 case 0:
3745 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3746 calldata->res.stateid.data,
faf5f49c 3747 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3748 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3749 break;
9e33bed5
TM		 3750 case -NFS4ERR_BAD_STATEID:
3751 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3752 case -NFS4ERR_STALE_STATEID:
3753 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3754 break;
3755 default:
9e33bed5 3756 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3757 nfs4_restart_rpc(task,
3758 calldata->server->nfs_client);
faf5f49c 3759 }
a893693c
AA		 3760 nfs4_sequence_free_slot(calldata->server->nfs_client,
3761 &calldata->res.seq_res);
faf5f49c
TM		 3762}
3763
4ce70ada 3764static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3765{
4ce70ada 3766 struct nfs4_unlockdata *calldata = data;
faf5f49c 3767
911d1aaf 3768 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3769 return;
3770 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3771 /* Note: exit _without_ running nfs4_locku_done */
3772 task->tk_action = NULL;
faf5f49c
TM		 3773 return;
3774 }
26e976a8 3775 calldata->timestamp = jiffies;
a893693c
AA		 3776 if (nfs4_setup_sequence(calldata->server->nfs_client,
3777 &calldata->arg.seq_args,
3778 &calldata->res.seq_res, 1, task))
3779 return;
5138fde0 3780 rpc_call_start(task);
faf5f49c
TM		 3781}
3782
963d8fe5 3783static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3784 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3785 .rpc_call_done = nfs4_locku_done,
06f814a3 3786 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3787};
3788
a5d16a4d
TM		 3789static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3790 struct nfs_open_context *ctx,
3791 struct nfs4_lock_state *lsp,
3792 struct nfs_seqid *seqid)
3793{
3794 struct nfs4_unlockdata *data;
5138fde0
TM		 3795 struct rpc_message msg = {
3796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3797 .rpc_cred = ctx->cred,
3798 };
c970aa85
TM		 3799 struct rpc_task_setup task_setup_data = {
3800 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3801 .rpc_message = &msg,
c970aa85 3802 .callback_ops = &nfs4_locku_ops,
101070ca 3803 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3804 .flags = RPC_TASK_ASYNC,
3805 };
a5d16a4d 3806
137d6aca
FF		 3807 /* Ensure this is an unlock - when canceling a lock, the
3808 * canceled lock is passed in, and it won't be an unlock.
3809 */
3810 fl->fl_type = F_UNLCK;
3811
a5d16a4d
TM		 3812 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3813 if (data == NULL) {
3814 nfs_free_seqid(seqid);
3815 return ERR_PTR(-ENOMEM);
3816 }
3817
5138fde0
TM		 3818 msg.rpc_argp = &data->arg,
3819 msg.rpc_resp = &data->res,
c970aa85
TM		 3820 task_setup_data.callback_data = data;
3821 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3822}
3823
faf5f49c
TM		 3824static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3825{
19e03c57 3826 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3827 struct nfs_seqid *seqid;
1da177e4 3828 struct nfs4_lock_state *lsp;
06f814a3
TM		 3829 struct rpc_task *task;
3830 int status = 0;
536ff0f8 3831 unsigned char fl_flags = request->fl_flags;
faf5f49c 3832
8d0a8a9d 3833 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3834 /* Unlock _before_ we do the RPC call */
3835 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3836 down_read(&nfsi->rwsem);
3837 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3838 up_read(&nfsi->rwsem);
9b073574 3839 goto out;
19e03c57
TM		 3840 }
3841 up_read(&nfsi->rwsem);
8d0a8a9d 3842 if (status != 0)
9b073574
TM		 3843 goto out;
3844 /* Is this a delegated lock? */
3845 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3846 goto out;
8d0a8a9d 3847 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3848 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3849 status = -ENOMEM;
911d1aaf 3850 if (seqid == NULL)
9b073574 3851 goto out;
cd3758e3 3852 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3853 status = PTR_ERR(task);
3854 if (IS_ERR(task))
9b073574 3855 goto out;
a5d16a4d 3856 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3857 rpc_put_task(task);
9b073574 3858out:
536ff0f8 3859 request->fl_flags = fl_flags;
1da177e4
LT		 3860 return status;
3861}
3862
a5d16a4d
TM		 3863struct nfs4_lockdata {
3864 struct nfs_lock_args arg;
3865 struct nfs_lock_res res;
3866 struct nfs4_lock_state *lsp;
3867 struct nfs_open_context *ctx;
3868 struct file_lock fl;
26e976a8 3869 unsigned long timestamp;
a5d16a4d
TM		 3870 int rpc_status;
3871 int cancelled;
66179efe 3872 struct nfs_server *server;
a5d16a4d
TM		 3873};
3874
3875static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3876 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3877{
a5d16a4d
TM		 3878 struct nfs4_lockdata *p;
3879 struct inode *inode = lsp->ls_state->inode;
1da177e4 3880 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3881
3882 p = kzalloc(sizeof(*p), GFP_KERNEL);
3883 if (p == NULL)
3884 return NULL;
3885
3886 p->arg.fh = NFS_FH(inode);
3887 p->arg.fl = &p->fl;
2f74c0a0
TM		 3888 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3889 if (p->arg.open_seqid == NULL)
3890 goto out_free;
a5d16a4d
TM		 3891 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3892 if (p->arg.lock_seqid == NULL)
2f74c0a0 3893 goto out_free_seqid;
a5d16a4d 3894 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3895 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3896 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3897 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3898 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3899 p->lsp = lsp;
66179efe 3900 p->server = server;
a5d16a4d
TM		 3901 atomic_inc(&lsp->ls_count);
3902 p->ctx = get_nfs_open_context(ctx);
3903 memcpy(&p->fl, fl, sizeof(p->fl));
3904 return p;
2f74c0a0
TM		 3905out_free_seqid:
3906 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3907out_free:
3908 kfree(p);
3909 return NULL;
3910}
3911
3912static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3913{
3914 struct nfs4_lockdata *data = calldata;
3915 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3916
3110ff80 3917 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3918 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3919 return;
a5d16a4d
TM		 3920 /* Do we need to do an open_to_lock_owner? */
3921 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3922 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3923 return;
a5d16a4d
TM		 3924 data->arg.open_stateid = &state->stateid;
3925 data->arg.new_lock_owner = 1;
c1d51931 3926 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3927 } else
3928 data->arg.new_lock_owner = 0;
26e976a8 3929 data->timestamp = jiffies;
66179efe
AA		 3930 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3931 &data->res.seq_res, 1, task))
3932 return;
5138fde0 3933 rpc_call_start(task);
3110ff80 3934 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3935}
3936
3937static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3938{
3939 struct nfs4_lockdata *data = calldata;
3940
3110ff80 3941 dprintk("%s: begin!\n", __func__);
a5d16a4d 3942
66179efe
AA		 3943 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3944 task->tk_status);
3945
a5d16a4d
TM		 3946 data->rpc_status = task->tk_status;
3947 if (RPC_ASSASSINATED(task))
3948 goto out;
3949 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3950 if (data->rpc_status == 0)
3951 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3952 else
3953 goto out;
3954 }
3955 if (data->rpc_status == 0) {
3956 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3957 sizeof(data->lsp->ls_stateid.data));
3958 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3959 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3960 }
a5d16a4d 3961out:
3110ff80 3962 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3963}
3964
3965static void nfs4_lock_release(void *calldata)
3966{
3967 struct nfs4_lockdata *data = calldata;
3968
3110ff80 3969 dprintk("%s: begin!\n", __func__);
2f74c0a0 3970 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3971 if (data->cancelled != 0) {
3972 struct rpc_task *task;
3973 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3974 data->arg.lock_seqid);
3975 if (!IS_ERR(task))
e6b3c4db 3976 rpc_put_task(task);
3110ff80 3977 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3978 } else
3979 nfs_free_seqid(data->arg.lock_seqid);
3980 nfs4_put_lock_state(data->lsp);
3981 put_nfs_open_context(data->ctx);
3982 kfree(data);
3110ff80 3983 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3984}
3985
3986static const struct rpc_call_ops nfs4_lock_ops = {
3987 .rpc_call_prepare = nfs4_lock_prepare,
3988 .rpc_call_done = nfs4_lock_done,
3989 .rpc_release = nfs4_lock_release,
3990};
3991
3992static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3993{
3994 struct nfs4_lockdata *data;
3995 struct rpc_task *task;
5138fde0
TM		 3996 struct rpc_message msg = {
3997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3998 .rpc_cred = state->owner->so_cred,
3999 };
c970aa85
TM		 4000 struct rpc_task_setup task_setup_data = {
4001 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4002 .rpc_message = &msg,
c970aa85 4003 .callback_ops = &nfs4_lock_ops,
101070ca 4004 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4005 .flags = RPC_TASK_ASYNC,
4006 };
a5d16a4d
TM		 4007 int ret;
4008
3110ff80 4009 dprintk("%s: begin!\n", __func__);
cd3758e3 4010 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 4011 fl->fl_u.nfs4_fl.owner);
4012 if (data == NULL)
4013 return -ENOMEM;
4014 if (IS_SETLKW(cmd))
4015 data->arg.block = 1;
4016 if (reclaim != 0)
4017 data->arg.reclaim = 1;
5138fde0
TM		 4018 msg.rpc_argp = &data->arg,
4019 msg.rpc_resp = &data->res,
c970aa85
TM		 4020 task_setup_data.callback_data = data;
4021 task = rpc_run_task(&task_setup_data);
7a1218a2 4022 if (IS_ERR(task))
a5d16a4d 4023 return PTR_ERR(task);
a5d16a4d
TM		 4024 ret = nfs4_wait_for_completion_rpc_task(task);
4025 if (ret == 0) {
4026 ret = data->rpc_status;
a5d16a4d
TM		 4027 } else
4028 data->cancelled = 1;
e6b3c4db 4029 rpc_put_task(task);
3110ff80 4030 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4031 return ret;
1da177e4
LT		 4032}
4033
4034static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4035{
202b50dc
TM		 4036 struct nfs_server *server = NFS_SERVER(state->inode);
4037 struct nfs4_exception exception = { };
4038 int err;
4039
4040 do {
42a2d13e
TM		 4041 /* Cache the lock if possible... */
4042 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4043 return 0;
202b50dc
TM		 4044 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4045 if (err != -NFS4ERR_DELAY)
4046 break;
4047 nfs4_handle_exception(server, err, &exception);
4048 } while (exception.retry);
4049 return err;
1da177e4
LT		 4050}
4051
4052static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4053{
202b50dc
TM		 4054 struct nfs_server *server = NFS_SERVER(state->inode);
4055 struct nfs4_exception exception = { };
4056 int err;
4057
6bfc93ef
TM		 4058 err = nfs4_set_lock_state(state, request);
4059 if (err != 0)
4060 return err;
202b50dc 4061 do {
42a2d13e
TM		 4062 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4063 return 0;
202b50dc 4064 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
a9ed2e25
TM		 4065 switch (err) {
4066 default:
4067 goto out;
4068 case -NFS4ERR_GRACE:
4069 case -NFS4ERR_DELAY:
4070 nfs4_handle_exception(server, err, &exception);
4071 err = 0;
4072 }
202b50dc 4073 } while (exception.retry);
a9ed2e25 4074out:
202b50dc 4075 return err;
1da177e4
LT		 4076}
4077
4078static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4079{
19e03c57 4080 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4081 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4082 int status;
4083
6bfc93ef 4084 /* Is this a delegated open? */
6bfc93ef
TM		 4085 status = nfs4_set_lock_state(state, request);
4086 if (status != 0)
4087 goto out;
01c3b861
TM		 4088 request->fl_flags |= FL_ACCESS;
4089 status = do_vfs_lock(request->fl_file, request);
4090 if (status < 0)
4091 goto out;
19e03c57 4092 down_read(&nfsi->rwsem);
01c3b861 4093 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4094 /* Yes: cache locks! */
01c3b861 4095 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4096 request->fl_flags = fl_flags & ~FL_SLEEP;
4097 status = do_vfs_lock(request->fl_file, request);
4098 goto out_unlock;
01c3b861 4099 }
6bfc93ef
TM		 4100 status = _nfs4_do_setlk(state, cmd, request, 0);
4101 if (status != 0)
01c3b861 4102 goto out_unlock;
6bfc93ef 4103 /* Note: we always want to sleep here! */
01c3b861 4104 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4105 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4106 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4107out_unlock:
19e03c57 4108 up_read(&nfsi->rwsem);
01c3b861
TM		 4109out:
4110 request->fl_flags = fl_flags;
1da177e4
LT		 4111 return status;
4112}
4113
4114static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4115{
4116 struct nfs4_exception exception = { };
4117 int err;
4118
4119 do {
965b5d67
TM		 4120 err = _nfs4_proc_setlk(state, cmd, request);
4121 if (err == -NFS4ERR_DENIED)
4122 err = -EAGAIN;
1da177e4 4123 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4124 err, &exception);
1da177e4
LT		 4125 } while (exception.retry);
4126 return err;
4127}
4128
4129static int
4130nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4131{
4132 struct nfs_open_context *ctx;
4133 struct nfs4_state *state;
4134 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4135 int status;
4136
4137 /* verify open state */
cd3758e3 4138 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4139 state = ctx->state;
4140
4141 if (request->fl_start < 0 || request->fl_end < 0)
4142 return -EINVAL;
4143
d953126a
TM		 4144 if (IS_GETLK(cmd)) {
4145 if (state != NULL)
4146 return nfs4_proc_getlk(state, F_GETLK, request);
4147 return 0;
4148 }
1da177e4
LT		 4149
4150 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4151 return -EINVAL;
4152
d953126a
TM		 4153 if (request->fl_type == F_UNLCK) {
4154 if (state != NULL)
4155 return nfs4_proc_unlck(state, cmd, request);
4156 return 0;
4157 }
1da177e4 4158
d953126a
TM		 4159 if (state == NULL)
4160 return -ENOLCK;
1da177e4
LT		 4161 do {
4162 status = nfs4_proc_setlk(state, cmd, request);
4163 if ((status != -EAGAIN) || IS_SETLK(cmd))
4164 break;
4165 timeout = nfs4_set_lock_task_retry(timeout);
4166 status = -ERESTARTSYS;
4167 if (signalled())
4168 break;
4169 } while(status < 0);
1da177e4
LT		 4170 return status;
4171}
4172
888e694c
TM		 4173int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4174{
4175 struct nfs_server *server = NFS_SERVER(state->inode);
4176 struct nfs4_exception exception = { };
4177 int err;
4178
4179 err = nfs4_set_lock_state(state, fl);
4180 if (err != 0)
4181 goto out;
4182 do {
4183 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4184 switch (err) {
4185 default:
4186 printk(KERN_ERR "%s: unhandled error %d.\n",
4187 __func__, err);
4188 case 0:
965b5d67 4189 case -ESTALE:
d5122201
TM		 4190 goto out;
4191 case -NFS4ERR_EXPIRED:
4192 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4193 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4194 nfs4_schedule_state_recovery(server->nfs_client);
4195 goto out;
965b5d67
TM		 4196 case -ERESTARTSYS:
4197 /*
4198 * The show must go on: exit, but mark the
4199 * stateid as needing recovery.
4200 */
4201 case -NFS4ERR_ADMIN_REVOKED:
4202 case -NFS4ERR_BAD_STATEID:
4203 case -NFS4ERR_OPENMODE:
4204 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4205 err = 0;
4206 goto out;
4207 case -ENOMEM:
4208 case -NFS4ERR_DENIED:
4209 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4210 err = 0;
4211 goto out;
d5122201
TM		 4212 case -NFS4ERR_DELAY:
4213 break;
4214 }
888e694c
TM		 4215 err = nfs4_handle_exception(server, err, &exception);
4216 } while (exception.retry);
4217out:
4218 return err;
4219}
6b3b5496 4220
aa1870af
BF		 4221#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4222
6b3b5496
BF		 4223int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4224 size_t buflen, int flags)
4225{
4b580ee3
BF		 4226 struct inode *inode = dentry->d_inode;
4227
4228 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4229 return -EOPNOTSUPP;
4230
4b580ee3 4231 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4232}
4233
4234/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4235 * and that's what we'll do for e.g. user attributes that haven't been set.
4236 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4237 * attributes in kernel-managed attribute namespaces. */
4238ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4239 size_t buflen)
4240{
aa1870af
BF		 4241 struct inode *inode = dentry->d_inode;
4242
4243 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4244 return -EOPNOTSUPP;
4245
4246 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4247}
4248
4249ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4250{
aa1870af 4251 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4252
096455a2
BF		 4253 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4254 return 0;
6b3b5496
BF		 4255 if (buf && buflen < len)
4256 return -ERANGE;
4257 if (buf)
aa1870af
BF		 4258 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4259 return len;
6b3b5496
BF		 4260}
4261
69aaaae1
TM		 4262static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4263{
4264 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4265 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4266 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4267 return;
4268
4269 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4270 NFS_ATTR_FATTR_NLINK;
4271 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4272 fattr->nlink = 2;
4273}
4274
56659e99 4275int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4276 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4277{
4278 struct nfs_server *server = NFS_SERVER(dir);
4279 u32 bitmask[2] = {
361e624f
MN		 4280 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4281 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4282 };
4283 struct nfs4_fs_locations_arg args = {
4284 .dir_fh = NFS_FH(dir),
c228fd3a 4285 .name = name,
683b57b4
TM		 4286 .page = page,
4287 .bitmask = bitmask,
4288 };
22958463
BH		 4289 struct nfs4_fs_locations_res res = {
4290 .fs_locations = fs_locations,
4291 };
683b57b4
TM		 4292 struct rpc_message msg = {
4293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4294 .rpc_argp = &args,
22958463 4295 .rpc_resp = &res,
683b57b4
TM		 4296 };
4297 int status;
4298
3110ff80 4299 dprintk("%s: start\n", __func__);
c228fd3a 4300 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4301 fs_locations->server = server;
830b8e33 4302 fs_locations->nlocations = 0;
cccef3b9 4303 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4304 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4305 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4306 return status;
4307}
4308
557134a3 4309#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4310/*
4311 * nfs4_proc_exchange_id()
4312 *
4313 * Since the clientid has expired, all compounds using sessions
4314 * associated with the stale clientid will be returning
4315 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4316 * be in some phase of session reset.
4317 */
4318static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4319{
4320 nfs4_verifier verifier;
4321 struct nfs41_exchange_id_args args = {
4322 .client = clp,
4323 .flags = clp->cl_exchange_flags,
4324 };
4325 struct nfs41_exchange_id_res res = {
4326 .client = clp,
4327 };
4328 int status;
4329 struct rpc_message msg = {
4330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4331 .rpc_argp = &args,
4332 .rpc_resp = &res,
4333 .rpc_cred = cred,
4334 };
4335 __be32 *p;
4336
4337 dprintk("--> %s\n", __func__);
4338 BUG_ON(clp == NULL);
a7b72103 4339
99fe60d0
BH		 4340 p = (u32 *)verifier.data;
4341 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4342 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4343 args.verifier = &verifier;
4344
4345 while (1) {
4346 args.id_len = scnprintf(args.id, sizeof(args.id),
4347 "%s/%s %u",
4348 clp->cl_ipaddr,
4349 rpc_peeraddr2str(clp->cl_rpcclient,
4350 RPC_DISPLAY_ADDR),
4351 clp->cl_id_uniquifier);
4352
4353 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4354
4355 if (status != NFS4ERR_CLID_INUSE)
4356 break;
4357
4358 if (signalled())
4359 break;
4360
4361 if (++clp->cl_id_uniquifier == 0)
4362 break;
4363 }
4364
4365 dprintk("<-- %s status= %d\n", __func__, status);
4366 return status;
4367}
4368
2050f0cc
AA		 4369struct nfs4_get_lease_time_data {
4370 struct nfs4_get_lease_time_args *args;
4371 struct nfs4_get_lease_time_res *res;
4372 struct nfs_client *clp;
4373};
4374
4375static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4376 void *calldata)
4377{
4378 int ret;
4379 struct nfs4_get_lease_time_data *data =
4380 (struct nfs4_get_lease_time_data *)calldata;
4381
4382 dprintk("--> %s\n", __func__);
4383 /* just setup sequence, do not trigger session recovery
4384 since we're invoked within one */
4385 ret = nfs41_setup_sequence(data->clp->cl_session,
4386 &data->args->la_seq_args,
4387 &data->res->lr_seq_res, 0, task);
4388
4389 BUG_ON(ret == -EAGAIN);
4390 rpc_call_start(task);
4391 dprintk("<-- %s\n", __func__);
4392}
4393
4394/*
4395 * Called from nfs4_state_manager thread for session setup, so don't recover
4396 * from sequence operation or clientid errors.
4397 */
4398static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4399{
4400 struct nfs4_get_lease_time_data *data =
4401 (struct nfs4_get_lease_time_data *)calldata;
4402
4403 dprintk("--> %s\n", __func__);
4404 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4405 switch (task->tk_status) {
4406 case -NFS4ERR_DELAY:
4407 case -NFS4ERR_GRACE:
4408 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4409 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4410 task->tk_status = 0;
eedc020e 4411 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4412 return;
4413 }
4414 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4415 dprintk("<-- %s\n", __func__);
4416}
4417
4418struct rpc_call_ops nfs4_get_lease_time_ops = {
4419 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4420 .rpc_call_done = nfs4_get_lease_time_done,
4421};
4422
4423int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4424{
4425 struct rpc_task *task;
4426 struct nfs4_get_lease_time_args args;
4427 struct nfs4_get_lease_time_res res = {
4428 .lr_fsinfo = fsinfo,
4429 };
4430 struct nfs4_get_lease_time_data data = {
4431 .args = &args,
4432 .res = &res,
4433 .clp = clp,
4434 };
4435 struct rpc_message msg = {
4436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4437 .rpc_argp = &args,
4438 .rpc_resp = &res,
4439 };
4440 struct rpc_task_setup task_setup = {
4441 .rpc_client = clp->cl_rpcclient,
4442 .rpc_message = &msg,
4443 .callback_ops = &nfs4_get_lease_time_ops,
4444 .callback_data = &data
4445 };
4446 int status;
4447
4448 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4449 dprintk("--> %s\n", __func__);
4450 task = rpc_run_task(&task_setup);
4451
4452 if (IS_ERR(task))
4453 status = PTR_ERR(task);
4454 else {
4455 status = task->tk_status;
4456 rpc_put_task(task);
4457 }
4458 dprintk("<-- %s return %d\n", __func__, status);
4459
4460 return status;
4461}
4462
b73dafa7
RL		 4463/*
4464 * Reset a slot table
4465 */
4466static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4467 int old_max_slots, int ivalue)
ac72b7b3 4468{
b73dafa7 4469 int i;
ac72b7b3
AA		 4470 int ret = 0;
4471
b73dafa7 4472 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4473
b73dafa7
RL		 4474 /*
4475 * Until we have dynamic slot table adjustment, insist
4476 * upon the same slot table size
4477 */
ac72b7b3
AA		 4478 if (max_slots != old_max_slots) {
4479 dprintk("%s reset slot table does't match old\n",
4480 __func__);
4481 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4482 goto out;
4483 }
4484 spin_lock(&tbl->slot_tbl_lock);
4485 for (i = 0; i < max_slots; ++i)
b73dafa7 4486 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4487 tbl->highest_used_slotid = -1;
4488 spin_unlock(&tbl->slot_tbl_lock);
4489 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4490 tbl, tbl->slots, tbl->max_slots);
4491out:
4492 dprintk("<-- %s: return %d\n", __func__, ret);
4493 return ret;
4494}
4495
b73dafa7
RL		 4496/*
4497 * Reset the forechannel and backchannel slot tables
4498 */
4499static int nfs4_reset_slot_tables(struct nfs4_session *session)
4500{
4501 int status;
4502
4503 status = nfs4_reset_slot_table(&session->fc_slot_table,
4504 session->fc_attrs.max_reqs,
4505 session->fc_slot_table.max_slots,
4506 1);
f8625a6a
RL		 4507 if (status)
4508 return status;
4509
4510 status = nfs4_reset_slot_table(&session->bc_slot_table,
4511 session->bc_attrs.max_reqs,
4512 session->bc_slot_table.max_slots,
4513 0);
b73dafa7
RL		 4514 return status;
4515}
4516
f8625a6a
RL		 4517/* Destroy the slot table */
4518static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4519{
4520 if (session->fc_slot_table.slots != NULL) {
4521 kfree(session->fc_slot_table.slots);
4522 session->fc_slot_table.slots = NULL;
4523 }
4524 if (session->bc_slot_table.slots != NULL) {
4525 kfree(session->bc_slot_table.slots);
4526 session->bc_slot_table.slots = NULL;
4527 }
4528 return;
4529}
4530
fc931582
AA		 4531/*
4532 * Initialize slot table
4533 */
050047ce
RL		 4534static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4535 int max_slots, int ivalue)
fc931582 4536{
050047ce 4537 int i;
fc931582
AA		 4538 struct nfs4_slot *slot;
4539 int ret = -ENOMEM;
4540
4541 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4542
050047ce 4543 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4544
4545 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4546 if (!slot)
4547 goto out;
4548 for (i = 0; i < max_slots; ++i)
050047ce 4549 slot[i].seq_nr = ivalue;
fc931582
AA		 4550 ret = 0;
4551
4552 spin_lock(&tbl->slot_tbl_lock);
4553 if (tbl->slots != NULL) {
4554 spin_unlock(&tbl->slot_tbl_lock);
4555 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4556 __func__, tbl, tbl->slots);
4557 WARN_ON(1);
4558 goto out_free;
4559 }
4560 tbl->max_slots = max_slots;
4561 tbl->slots = slot;
4562 tbl->highest_used_slotid = -1; /* no slot is currently used */
4563 spin_unlock(&tbl->slot_tbl_lock);
4564 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4565 tbl, tbl->slots, tbl->max_slots);
4566out:
4567 dprintk("<-- %s: return %d\n", __func__, ret);
4568 return ret;
050047ce 4569
fc931582
AA		 4570out_free:
4571 kfree(slot);
4572 goto out;
4573}
4574
050047ce
RL		 4575/*
4576 * Initialize the forechannel and backchannel tables
4577 */
4578static int nfs4_init_slot_tables(struct nfs4_session *session)
4579{
4580 int status;
4581
4582 status = nfs4_init_slot_table(&session->fc_slot_table,
4583 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4584 if (status)
4585 return status;
050047ce 4586
f8625a6a
RL		 4587 status = nfs4_init_slot_table(&session->bc_slot_table,
4588 session->bc_attrs.max_reqs, 0);
4589 if (status)
4590 nfs4_destroy_slot_tables(session);
4591
4592 return status;
557134a3
AA		 4593}
4594
4595struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4596{
4597 struct nfs4_session *session;
4598 struct nfs4_slot_table *tbl;
4599
4600 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4601 if (!session)
4602 return NULL;
76db6d95
AA		 4603
4604 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4605 /*
4606 * The create session reply races with the server back
4607 * channel probe. Mark the client NFS_CS_SESSION_INITING
4608 * so that the client back channel can find the
4609 * nfs_client struct
4610 */
4611 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4612
557134a3
AA		 4613 tbl = &session->fc_slot_table;
4614 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4615 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4616
4617 tbl = &session->bc_slot_table;
4618 spin_lock_init(&tbl->slot_tbl_lock);
4619 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4620
557134a3
AA		 4621 session->clp = clp;
4622 return session;
4623}
4624
4625void nfs4_destroy_session(struct nfs4_session *session)
4626{
5a0ffe54
AA		 4627 nfs4_proc_destroy_session(session);
4628 dprintk("%s Destroy backchannel for xprt %p\n",
4629 __func__, session->clp->cl_rpcclient->cl_xprt);
4630 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4631 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4632 nfs4_destroy_slot_tables(session);
557134a3
AA		 4633 kfree(session);
4634}
4635
fc931582
AA		 4636/*
4637 * Initialize the values to be used by the client in CREATE_SESSION
4638 * If nfs4_init_session set the fore channel request and response sizes,
4639 * use them.
4640 *
4641 * Set the back channel max_resp_sz_cached to zero to force the client to
4642 * always set csa_cachethis to FALSE because the current implementation
4643 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4644 */
4645static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4646{
4647 struct nfs4_session *session = args->client->cl_session;
4648 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4649 mxresp_sz = session->fc_attrs.max_resp_sz;
4650
4651 if (mxrqst_sz == 0)
4652 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4653 if (mxresp_sz == 0)
4654 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4655 /* Fore channel attributes */
4656 args->fc_attrs.headerpadsz = 0;
4657 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4658 args->fc_attrs.max_resp_sz = mxresp_sz;
4659 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4660 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4661 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4662
4663 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4664 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4665 __func__,
4666 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4667 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4668 args->fc_attrs.max_reqs);
4669
4670 /* Back channel attributes */
4671 args->bc_attrs.headerpadsz = 0;
4672 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4673 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4674 args->bc_attrs.max_resp_sz_cached = 0;
4675 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4676 args->bc_attrs.max_reqs = 1;
4677
4678 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4679 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4680 __func__,
4681 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4682 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4683 args->bc_attrs.max_reqs);
4684}
4685
8d35301d
AA		 4686static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4687{
4688 if (rcvd <= sent)
4689 return 0;
4690 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4691 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4692 return -EINVAL;
4693}
4694
4695#define _verify_fore_channel_attr(_name_) \
4696 _verify_channel_attr("fore", #_name_, \
4697 args->fc_attrs._name_, \
4698 session->fc_attrs._name_)
4699
4700#define _verify_back_channel_attr(_name_) \
4701 _verify_channel_attr("back", #_name_, \
4702 args->bc_attrs._name_, \
4703 session->bc_attrs._name_)
4704
4705/*
4706 * The server is not allowed to increase the fore channel header pad size,
4707 * maximum response size, or maximum number of operations.
4708 *
4709 * The back channel attributes are only negotiatied down: We send what the
4710 * (back channel) server insists upon.
4711 */
4712static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4713 struct nfs4_session *session)
4714{
4715 int ret = 0;
4716
4717 ret |= _verify_fore_channel_attr(headerpadsz);
4718 ret |= _verify_fore_channel_attr(max_resp_sz);
4719 ret |= _verify_fore_channel_attr(max_ops);
4720
4721 ret |= _verify_back_channel_attr(headerpadsz);
4722 ret |= _verify_back_channel_attr(max_rqst_sz);
4723 ret |= _verify_back_channel_attr(max_resp_sz);
4724 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4725 ret |= _verify_back_channel_attr(max_ops);
4726 ret |= _verify_back_channel_attr(max_reqs);
4727
4728 return ret;
4729}
4730
fc931582
AA		 4731static int _nfs4_proc_create_session(struct nfs_client *clp)
4732{
4733 struct nfs4_session *session = clp->cl_session;
4734 struct nfs41_create_session_args args = {
4735 .client = clp,
4736 .cb_program = NFS4_CALLBACK,
4737 };
4738 struct nfs41_create_session_res res = {
4739 .client = clp,
4740 };
4741 struct rpc_message msg = {
4742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4743 .rpc_argp = &args,
4744 .rpc_resp = &res,
4745 };
4746 int status;
4747
4748 nfs4_init_channel_attrs(&args);
0f91421e 4749 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4750
4751 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4752
8d35301d
AA		 4753 if (!status)
4754 /* Verify the session's negotiated channel_attrs values */
4755 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4756 if (!status) {
4757 /* Increment the clientid slot sequence id */
4758 clp->cl_seqid++;
4759 }
4760
4761 return status;
4762}
4763
4764/*
4765 * Issues a CREATE_SESSION operation to the server.
4766 * It is the responsibility of the caller to verify the session is
4767 * expired before calling this routine.
4768 */
ac72b7b3 4769int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4770{
4771 int status;
4772 unsigned *ptr;
4773 struct nfs_fsinfo fsinfo;
4774 struct nfs4_session *session = clp->cl_session;
4775
4776 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4777
4778 status = _nfs4_proc_create_session(clp);
4779 if (status)
4780 goto out;
4781
ac72b7b3
AA		 4782 /* Init or reset the fore channel */
4783 if (reset)
b73dafa7 4784 status = nfs4_reset_slot_tables(session);
ac72b7b3 4785 else
050047ce 4786 status = nfs4_init_slot_tables(session);
fc931582
AA		 4787 dprintk("fore channel slot table initialization returned %d\n", status);
4788 if (status)
4789 goto out;
4790
4791 ptr = (unsigned *)&session->sess_id.data[0];
4792 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4793 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4794
ac72b7b3
AA		 4795 if (reset)
4796 /* Lease time is aleady set */
4797 goto out;
4798
fc931582
AA		 4799 /* Get the lease time */
4800 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4801 if (status == 0) {
4802 /* Update lease time and schedule renewal */
4803 spin_lock(&clp->cl_lock);
4804 clp->cl_lease_time = fsinfo.lease_time * HZ;
4805 clp->cl_last_renewal = jiffies;
4806 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4807 spin_unlock(&clp->cl_lock);
4808
4809 nfs4_schedule_state_renewal(clp);
4810 }
4811out:
4812 dprintk("<-- %s\n", __func__);
4813 return status;
4814}
4815
0f3e66c6
AA		 4816/*
4817 * Issue the over-the-wire RPC DESTROY_SESSION.
4818 * The caller must serialize access to this routine.
4819 */
4820int nfs4_proc_destroy_session(struct nfs4_session *session)
4821{
4822 int status = 0;
4823 struct rpc_message msg;
4824
4825 dprintk("--> nfs4_proc_destroy_session\n");
4826
4827 /* session is still being setup */
4828 if (session->clp->cl_cons_state != NFS_CS_READY)
4829 return status;
4830
4831 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4832 msg.rpc_argp = session;
4833 msg.rpc_resp = NULL;
4834 msg.rpc_cred = NULL;
4835 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4836
4837 if (status)
4838 printk(KERN_WARNING
4839 "Got error %d from the server on DESTROY_SESSION. "
4840 "Session has been destroyed regardless...\n", status);
4841
4842 dprintk("<-- nfs4_proc_destroy_session\n");
4843 return status;
4844}
4845
fccba804
TM		 4846int nfs4_init_session(struct nfs_server *server)
4847{
4848 struct nfs_client *clp = server->nfs_client;
4849 int ret;
4850
4851 if (!nfs4_has_session(clp))
4852 return 0;
4853
4854 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4855 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4856 ret = nfs4_recover_expired_lease(server);
4857 if (!ret)
4858 ret = nfs4_check_client_ready(clp);
4859 return ret;
4860}
4861
fc01cea9
AA		 4862/*
4863 * Renew the cl_session lease.
4864 */
4865static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4866{
4867 struct nfs4_sequence_args args;
4868 struct nfs4_sequence_res res;
4869
4870 struct rpc_message msg = {
4871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4872 .rpc_argp = &args,
4873 .rpc_resp = &res,
4874 .rpc_cred = cred,
4875 };
4876
4877 args.sa_cache_this = 0;
4878
4879 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4880 &res, 0);
4881}
4882
4883void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4884{
4885 struct nfs_client *clp = (struct nfs_client *)data;
4886
4887 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4888
4889 if (task->tk_status < 0) {
4890 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4891
4892 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4893 == -EAGAIN) {
eedc020e 4894 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4895 return;
4896 }
4897 }
4898 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4899 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4900
fc01cea9
AA		 4901 kfree(task->tk_msg.rpc_argp);
4902 kfree(task->tk_msg.rpc_resp);
4903
4904 dprintk("<-- %s\n", __func__);
4905}
4906
4907static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4908{
4909 struct nfs_client *clp;
4910 struct nfs4_sequence_args *args;
4911 struct nfs4_sequence_res *res;
4912
4913 clp = (struct nfs_client *)data;
4914 args = task->tk_msg.rpc_argp;
4915 res = task->tk_msg.rpc_resp;
4916
4917 if (nfs4_setup_sequence(clp, args, res, 0, task))
4918 return;
4919 rpc_call_start(task);
4920}
4921
4922static const struct rpc_call_ops nfs41_sequence_ops = {
4923 .rpc_call_done = nfs41_sequence_call_done,
4924 .rpc_call_prepare = nfs41_sequence_prepare,
4925};
4926
4927static int nfs41_proc_async_sequence(struct nfs_client *clp,
4928 struct rpc_cred *cred)
4929{
4930 struct nfs4_sequence_args *args;
4931 struct nfs4_sequence_res *res;
4932 struct rpc_message msg = {
4933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4934 .rpc_cred = cred,
4935 };
4936
4937 args = kzalloc(sizeof(*args), GFP_KERNEL);
4938 if (!args)
4939 return -ENOMEM;
4940 res = kzalloc(sizeof(*res), GFP_KERNEL);
4941 if (!res) {
4942 kfree(args);
4943 return -ENOMEM;
4944 }
4945 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4946 msg.rpc_argp = args;
4947 msg.rpc_resp = res;
4948
4949 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4950 &nfs41_sequence_ops, (void *)clp);
4951}
4952
557134a3
AA		 4953#endif /* CONFIG_NFS_V4_1 */
4954
591d71cb 4955struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4956 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4957 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4958 .recover_open = nfs4_open_reclaim,
4959 .recover_lock = nfs4_lock_reclaim,
591d71cb 4960 .establish_clid = nfs4_init_clientid,
90a16617 4961 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4962};
4963
591d71cb
AA		 4964#if defined(CONFIG_NFS_V4_1)
4965struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4966 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4967 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4968 .recover_open = nfs4_open_reclaim,
4969 .recover_lock = nfs4_lock_reclaim,
4970 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4971 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4972};
4973#endif /* CONFIG_NFS_V4_1 */
4974
4975struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4976 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4977 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4978 .recover_open = nfs4_open_expired,
4979 .recover_lock = nfs4_lock_expired,
4980 .establish_clid = nfs4_init_clientid,
90a16617 4981 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4982};
4983
4984#if defined(CONFIG_NFS_V4_1)
4985struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4986 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4987 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4988 .recover_open = nfs4_open_expired,
4989 .recover_lock = nfs4_lock_expired,
591d71cb 4990 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4991 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4992};
591d71cb 4993#endif /* CONFIG_NFS_V4_1 */
1da177e4 4994
29fba38b
BH		 4995struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4996 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4997 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4998 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4999};
5000
5001#if defined(CONFIG_NFS_V4_1)
5002struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5003 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 5004 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 5005 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 5006};
5007#endif
5008
5009/*
5010 * Per minor version reboot and network partition recovery ops
5011 */
5012
591d71cb
AA		 5013struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5014 &nfs40_reboot_recovery_ops,
5015#if defined(CONFIG_NFS_V4_1)
5016 &nfs41_reboot_recovery_ops,
5017#endif
5018};
5019
5020struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5021 &nfs40_nograce_recovery_ops,
5022#if defined(CONFIG_NFS_V4_1)
5023 &nfs41_nograce_recovery_ops,
5024#endif
5025};
5026
29fba38b
BH		 5027struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5028 &nfs40_state_renewal_ops,
5029#if defined(CONFIG_NFS_V4_1)
5030 &nfs41_state_renewal_ops,
5031#endif
5032};
5033
92e1d5be 5034static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5035 .permission = nfs_permission,
5036 .getattr = nfs_getattr,
5037 .setattr = nfs_setattr,
5038 .getxattr = nfs4_getxattr,
5039 .setxattr = nfs4_setxattr,
5040 .listxattr = nfs4_listxattr,
5041};
5042
509de811 5043const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5044 .version = 4, /* protocol version */
5045 .dentry_ops = &nfs4_dentry_operations,
5046 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5047 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5048 .getroot = nfs4_proc_get_root,
5049 .getattr = nfs4_proc_getattr,
5050 .setattr = nfs4_proc_setattr,
2b3de441 5051 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5052 .lookup = nfs4_proc_lookup,
5053 .access = nfs4_proc_access,
5054 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5055 .create = nfs4_proc_create,
5056 .remove = nfs4_proc_remove,
5057 .unlink_setup = nfs4_proc_unlink_setup,
5058 .unlink_done = nfs4_proc_unlink_done,
5059 .rename = nfs4_proc_rename,
5060 .link = nfs4_proc_link,
5061 .symlink = nfs4_proc_symlink,
5062 .mkdir = nfs4_proc_mkdir,
5063 .rmdir = nfs4_proc_remove,
5064 .readdir = nfs4_proc_readdir,
5065 .mknod = nfs4_proc_mknod,
5066 .statfs = nfs4_proc_statfs,
5067 .fsinfo = nfs4_proc_fsinfo,
5068 .pathconf = nfs4_proc_pathconf,
e9326dca 5069 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5070 .decode_dirent = nfs4_decode_dirent,
5071 .read_setup = nfs4_proc_read_setup,
ec06c096 5072 .read_done = nfs4_read_done,
1da177e4 5073 .write_setup = nfs4_proc_write_setup,
788e7a89 5074 .write_done = nfs4_write_done,
1da177e4 5075 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5076 .commit_done = nfs4_commit_done,
1da177e4 5077 .lock = nfs4_proc_lock,
e50a1c2e 5078 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5079 .close_context = nfs4_close_context,
1da177e4
LT		 5080};
5081
5082/*
5083 * Local variables:
5084 * c-basic-offset: 8
5085 * End:
5086 */
Linux 6.x block layer and io_uring tree(s)