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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid
[deliverable/linux.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>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
a78cb57a
TM		 64#define NFS4_MAX_LOOP_ON_RECOVER (10)
65
cdd4e68b 66struct nfs4_opendata;
864472e9 67static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 68static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 69static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 70static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 72
1da177e4 73/* Prevent leaks of NFSv4 errors into userland */
46f72f57 74static int nfs4_map_errors(int err)
1da177e4
LT		 75{
76 if (err < -1000) {
77 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 78 __func__, -err);
1da177e4
LT		 79 return -EIO;
80 }
81 return err;
82}
83
84/*
85 * This is our standard bitmap for GETATTR requests.
86 */
87const u32 nfs4_fattr_bitmap[2] = {
88 FATTR4_WORD0_TYPE
89 | FATTR4_WORD0_CHANGE
90 | FATTR4_WORD0_SIZE
91 | FATTR4_WORD0_FSID
92 | FATTR4_WORD0_FILEID,
93 FATTR4_WORD1_MODE
94 | FATTR4_WORD1_NUMLINKS
95 | FATTR4_WORD1_OWNER
96 | FATTR4_WORD1_OWNER_GROUP
97 | FATTR4_WORD1_RAWDEV
98 | FATTR4_WORD1_SPACE_USED
99 | FATTR4_WORD1_TIME_ACCESS
100 | FATTR4_WORD1_TIME_METADATA
101 | FATTR4_WORD1_TIME_MODIFY
102};
103
104const u32 nfs4_statfs_bitmap[2] = {
105 FATTR4_WORD0_FILES_AVAIL
106 | FATTR4_WORD0_FILES_FREE
107 | FATTR4_WORD0_FILES_TOTAL,
108 FATTR4_WORD1_SPACE_AVAIL
109 | FATTR4_WORD1_SPACE_FREE
110 | FATTR4_WORD1_SPACE_TOTAL
111};
112
4ce79717 113const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 114 FATTR4_WORD0_MAXLINK
115 | FATTR4_WORD0_MAXNAME,
116 0
117};
118
119const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
120 | FATTR4_WORD0_MAXREAD
121 | FATTR4_WORD0_MAXWRITE
122 | FATTR4_WORD0_LEASE_TIME,
123 0
124};
125
830b8e33
MN		 126const u32 nfs4_fs_locations_bitmap[2] = {
127 FATTR4_WORD0_TYPE
128 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_SIZE
130 | FATTR4_WORD0_FSID
131 | FATTR4_WORD0_FILEID
132 | FATTR4_WORD0_FS_LOCATIONS,
133 FATTR4_WORD1_MODE
134 | FATTR4_WORD1_NUMLINKS
135 | FATTR4_WORD1_OWNER
136 | FATTR4_WORD1_OWNER_GROUP
137 | FATTR4_WORD1_RAWDEV
138 | FATTR4_WORD1_SPACE_USED
139 | FATTR4_WORD1_TIME_ACCESS
140 | FATTR4_WORD1_TIME_METADATA
141 | FATTR4_WORD1_TIME_MODIFY
142 | FATTR4_WORD1_MOUNTED_ON_FILEID
143};
144
bc4785cd 145static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 146 struct nfs4_readdir_arg *readdir)
147{
0dbb4c67 148 __be32 *start, *p;
1da177e4
LT		 149
150 BUG_ON(readdir->count < 80);
151 if (cookie > 2) {
b7ef1956 152 readdir->cookie = cookie;
1da177e4
LT		 153 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 return;
155 }
156
157 readdir->cookie = 0;
158 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 if (cookie == 2)
160 return;
161
162 /*
163 * NFSv4 servers do not return entries for '.' and '..'
164 * Therefore, we fake these entries here. We let '.'
165 * have cookie 0 and '..' have cookie 1. Note that
166 * when talking to the server, we always send cookie 0
167 * instead of 1 or 2.
168 */
0dbb4c67 169 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 170
171 if (cookie == 0) {
172 *p++ = xdr_one; /* next */
173 *p++ = xdr_zero; /* cookie, first word */
174 *p++ = xdr_one; /* cookie, second word */
175 *p++ = xdr_one; /* entry len */
176 memcpy(p, ".\0\0\0", 4); /* entry */
177 p++;
178 *p++ = xdr_one; /* bitmap length */
179 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
180 *p++ = htonl(8); /* attribute buffer length */
4e769b93 181 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 182 }
183
184 *p++ = xdr_one; /* next */
185 *p++ = xdr_zero; /* cookie, first word */
186 *p++ = xdr_two; /* cookie, second word */
187 *p++ = xdr_two; /* entry len */
188 memcpy(p, "..\0\0", 4); /* entry */
189 p++;
190 *p++ = xdr_one; /* bitmap length */
191 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
192 *p++ = htonl(8); /* attribute buffer length */
4e769b93 193 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 194
195 readdir->pgbase = (char *)p - (char *)start;
196 readdir->count -= readdir->pgbase;
197 kunmap_atomic(start, KM_USER0);
198}
199
65de872e
TM		 200static int nfs4_wait_clnt_recover(struct nfs_client *clp)
201{
202 int res;
203
204 might_sleep();
205
e005e804 206 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 207 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 208 return res;
209}
210
211static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
212{
213 int res = 0;
214
215 might_sleep();
216
217 if (*timeout <= 0)
218 *timeout = NFS4_POLL_RETRY_MIN;
219 if (*timeout > NFS4_POLL_RETRY_MAX)
220 *timeout = NFS4_POLL_RETRY_MAX;
221 schedule_timeout_killable(*timeout);
222 if (fatal_signal_pending(current))
223 res = -ERESTARTSYS;
224 *timeout <<= 1;
225 return res;
226}
227
228/* This is the error handling routine for processes that are allowed
229 * to sleep.
230 */
231static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
232{
233 struct nfs_client *clp = server->nfs_client;
9e33bed5 234 struct nfs4_state *state = exception->state;
65de872e
TM		 235 int ret = errorcode;
236
237 exception->retry = 0;
238 switch(errorcode) {
239 case 0:
240 return 0;
9e33bed5
TM		 241 case -NFS4ERR_ADMIN_REVOKED:
242 case -NFS4ERR_BAD_STATEID:
243 case -NFS4ERR_OPENMODE:
244 if (state == NULL)
245 break;
246 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 247 case -NFS4ERR_STALE_CLIENTID:
248 case -NFS4ERR_STALE_STATEID:
249 case -NFS4ERR_EXPIRED:
250 nfs4_schedule_state_recovery(clp);
251 ret = nfs4_wait_clnt_recover(clp);
252 if (ret == 0)
253 exception->retry = 1;
4745e315 254#if !defined(CONFIG_NFS_V4_1)
65de872e 255 break;
4745e315
AA		 256#else /* !defined(CONFIG_NFS_V4_1) */
257 if (!nfs4_has_session(server->nfs_client))
258 break;
259 /* FALLTHROUGH */
260 case -NFS4ERR_BADSESSION:
261 case -NFS4ERR_BADSLOT:
262 case -NFS4ERR_BAD_HIGH_SLOT:
263 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
264 case -NFS4ERR_DEADSESSION:
265 case -NFS4ERR_SEQ_FALSE_RETRY:
266 case -NFS4ERR_SEQ_MISORDERED:
267 dprintk("%s ERROR: %d Reset session\n", __func__,
268 errorcode);
269 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
270 exception->retry = 1;
271 /* FALLTHROUGH */
272#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM		 273 case -NFS4ERR_FILE_OPEN:
274 case -NFS4ERR_GRACE:
275 case -NFS4ERR_DELAY:
276 ret = nfs4_delay(server->client, &exception->timeout);
277 if (ret != 0)
278 break;
279 case -NFS4ERR_OLD_STATEID:
280 exception->retry = 1;
281 }
282 /* We failed to handle the error */
283 return nfs4_map_errors(ret);
284}
285
286
26e976a8 287static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 288{
7539bbab 289 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 290 spin_lock(&clp->cl_lock);
291 if (time_before(clp->cl_last_renewal,timestamp))
292 clp->cl_last_renewal = timestamp;
293 spin_unlock(&clp->cl_lock);
294}
295
cccef3b9
AA		 296#if defined(CONFIG_NFS_V4_1)
297
e2c4ab3c
AA		 298/*
299 * nfs4_free_slot - free a slot and efficiently update slot table.
300 *
301 * freeing a slot is trivially done by clearing its respective bit
302 * in the bitmap.
303 * If the freed slotid equals highest_used_slotid we want to update it
304 * so that the server would be able to size down the slot table if needed,
305 * otherwise we know that the highest_used_slotid is still in use.
306 * When updating highest_used_slotid there may be "holes" in the bitmap
307 * so we need to scan down from highest_used_slotid to 0 looking for the now
308 * highest slotid in use.
309 * If none found, highest_used_slotid is set to -1.
310 */
311static void
312nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
313{
314 int slotid = free_slotid;
315
316 spin_lock(&tbl->slot_tbl_lock);
317 /* clear used bit in bitmap */
318 __clear_bit(slotid, tbl->used_slots);
319
320 /* update highest_used_slotid when it is freed */
321 if (slotid == tbl->highest_used_slotid) {
322 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
323 if (slotid >= 0 && slotid < tbl->max_slots)
324 tbl->highest_used_slotid = slotid;
325 else
326 tbl->highest_used_slotid = -1;
327 }
328 rpc_wake_up_next(&tbl->slot_tbl_waitq);
329 spin_unlock(&tbl->slot_tbl_lock);
330 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
331 free_slotid, tbl->highest_used_slotid);
332}
333
13615871
AA		 334void nfs41_sequence_free_slot(const struct nfs_client *clp,
335 struct nfs4_sequence_res *res)
336{
337 struct nfs4_slot_table *tbl;
338
339 if (!nfs4_has_session(clp)) {
340 dprintk("%s: No session\n", __func__);
341 return;
342 }
343 tbl = &clp->cl_session->fc_slot_table;
344 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
345 dprintk("%s: No slot\n", __func__);
346 /* just wake up the next guy waiting since
347 * we may have not consumed a slot after all */
348 rpc_wake_up_next(&tbl->slot_tbl_waitq);
349 return;
350 }
351 nfs4_free_slot(tbl, res->sr_slotid);
352 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
353}
354
b0df806c
AA		 355static void nfs41_sequence_done(struct nfs_client *clp,
356 struct nfs4_sequence_res *res,
357 int rpc_status)
358{
359 unsigned long timestamp;
360 struct nfs4_slot_table *tbl;
361 struct nfs4_slot *slot;
362
363 /*
364 * sr_status remains 1 if an RPC level error occurred. The server
365 * may or may not have processed the sequence operation..
366 * Proceed as if the server received and processed the sequence
367 * operation.
368 */
369 if (res->sr_status == 1)
370 res->sr_status = NFS_OK;
371
372 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
373 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
374 goto out;
375
376 tbl = &clp->cl_session->fc_slot_table;
377 slot = tbl->slots + res->sr_slotid;
378
379 if (res->sr_status == 0) {
380 /* Update the slot's sequence and clientid lease timer */
381 ++slot->seq_nr;
382 timestamp = res->sr_renewal_time;
383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal, timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
387 return;
388 }
389out:
390 /* The session may be reset by one of the error handlers. */
391 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
392 nfs41_sequence_free_slot(clp, res);
393}
394
510b8175
BH		 395/*
396 * nfs4_find_slot - efficiently look for a free slot
397 *
398 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
399 * If found, we mark the slot as used, update the highest_used_slotid,
400 * and respectively set up the sequence operation args.
401 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 402 *
403 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 404 */
405static u8
406nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
407{
408 int slotid;
409 u8 ret_id = NFS4_MAX_SLOT_TABLE;
410 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
411
510b8175
BH		 412 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
413 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
414 tbl->max_slots);
415 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
416 if (slotid >= tbl->max_slots)
417 goto out;
418 __set_bit(slotid, tbl->used_slots);
419 if (slotid > tbl->highest_used_slotid)
420 tbl->highest_used_slotid = slotid;
421 ret_id = slotid;
422out:
423 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
424 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 425 return ret_id;
426}
427
b069d94a
AA		 428static int nfs4_recover_session(struct nfs4_session *session)
429{
430 struct nfs_client *clp = session->clp;
a78cb57a 431 unsigned int loop;
b069d94a
AA		 432 int ret;
433
a78cb57a 434 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
b069d94a
AA		 435 ret = nfs4_wait_clnt_recover(clp);
436 if (ret != 0)
a78cb57a 437 break;
b069d94a
AA		 438 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
439 break;
440 nfs4_schedule_state_manager(clp);
a78cb57a 441 ret = -EIO;
b069d94a 442 }
a78cb57a 443 return ret;
b069d94a
AA		 444}
445
ce5039c1
AA		 446static int nfs41_setup_sequence(struct nfs4_session *session,
447 struct nfs4_sequence_args *args,
448 struct nfs4_sequence_res *res,
449 int cache_reply,
450 struct rpc_task *task)
451{
fbcd4abc
AA		 452 struct nfs4_slot *slot;
453 struct nfs4_slot_table *tbl;
b069d94a 454 int status = 0;
fbcd4abc
AA		 455 u8 slotid;
456
457 dprintk("--> %s\n", __func__);
ce5039c1
AA		 458 /* slot already allocated? */
459 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
460 return 0;
461
462 memset(res, 0, sizeof(*res));
463 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 464 tbl = &session->fc_slot_table;
465
466 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 467 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
468 if (tbl->highest_used_slotid != -1) {
469 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
470 spin_unlock(&tbl->slot_tbl_lock);
471 dprintk("<-- %s: Session reset: draining\n", __func__);
472 return -EAGAIN;
473 }
474
475 /* The slot table is empty; start the reset thread */
476 dprintk("%s Session Reset\n", __func__);
477 spin_unlock(&tbl->slot_tbl_lock);
478 status = nfs4_recover_session(session);
479 if (status)
480 return status;
481 spin_lock(&tbl->slot_tbl_lock);
482 }
483
fbcd4abc
AA		 484 slotid = nfs4_find_slot(tbl, task);
485 if (slotid == NFS4_MAX_SLOT_TABLE) {
486 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
487 spin_unlock(&tbl->slot_tbl_lock);
488 dprintk("<-- %s: no free slots\n", __func__);
489 return -EAGAIN;
490 }
491 spin_unlock(&tbl->slot_tbl_lock);
492
493 slot = tbl->slots + slotid;
99fe60d0 494 args->sa_session = session;
fbcd4abc
AA		 495 args->sa_slotid = slotid;
496 args->sa_cache_this = cache_reply;
497
498 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
499
99fe60d0 500 res->sr_session = session;
fbcd4abc
AA		 501 res->sr_slotid = slotid;
502 res->sr_renewal_time = jiffies;
503 /*
504 * sr_status is only set in decode_sequence, and so will remain
505 * set to 1 if an rpc level failure occurs.
506 */
507 res->sr_status = 1;
ce5039c1
AA		 508 return 0;
509}
510
511int nfs4_setup_sequence(struct nfs_client *clp,
512 struct nfs4_sequence_args *args,
513 struct nfs4_sequence_res *res,
514 int cache_reply,
515 struct rpc_task *task)
516{
517 int ret = 0;
518
519 dprintk("--> %s clp %p session %p sr_slotid %d\n",
520 __func__, clp, clp->cl_session, res->sr_slotid);
521
522 if (!nfs4_has_session(clp))
523 goto out;
524 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
525 task);
526 if (ret != -EAGAIN) {
527 /* terminate rpc task */
528 task->tk_status = ret;
529 task->tk_action = NULL;
530 }
531out:
532 dprintk("<-- %s status=%d\n", __func__, ret);
533 return ret;
534}
535
536struct nfs41_call_sync_data {
537 struct nfs_client *clp;
538 struct nfs4_sequence_args *seq_args;
539 struct nfs4_sequence_res *seq_res;
540 int cache_reply;
541};
542
543static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
544{
545 struct nfs41_call_sync_data *data = calldata;
546
547 dprintk("--> %s data->clp->cl_session %p\n", __func__,
548 data->clp->cl_session);
549 if (nfs4_setup_sequence(data->clp, data->seq_args,
550 data->seq_res, data->cache_reply, task))
551 return;
552 rpc_call_start(task);
553}
554
69ab40c4
AA		 555static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
556{
557 struct nfs41_call_sync_data *data = calldata;
558
559 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
560 nfs41_sequence_free_slot(data->clp, data->seq_res);
561}
562
ce5039c1
AA		 563struct rpc_call_ops nfs41_call_sync_ops = {
564 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 565 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 566};
567
568static int nfs4_call_sync_sequence(struct nfs_client *clp,
569 struct rpc_clnt *clnt,
570 struct rpc_message *msg,
571 struct nfs4_sequence_args *args,
572 struct nfs4_sequence_res *res,
573 int cache_reply)
574{
575 int ret;
576 struct rpc_task *task;
577 struct nfs41_call_sync_data data = {
578 .clp = clp,
579 .seq_args = args,
580 .seq_res = res,
581 .cache_reply = cache_reply,
582 };
583 struct rpc_task_setup task_setup = {
584 .rpc_client = clnt,
585 .rpc_message = msg,
586 .callback_ops = &nfs41_call_sync_ops,
587 .callback_data = &data
588 };
589
590 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
591 task = rpc_run_task(&task_setup);
592 if (IS_ERR(task))
593 ret = PTR_ERR(task);
594 else {
595 ret = task->tk_status;
596 rpc_put_task(task);
597 }
598 return ret;
599}
600
cccef3b9
AA		 601int _nfs4_call_sync_session(struct nfs_server *server,
602 struct rpc_message *msg,
603 struct nfs4_sequence_args *args,
604 struct nfs4_sequence_res *res,
605 int cache_reply)
606{
ce5039c1
AA		 607 return nfs4_call_sync_sequence(server->nfs_client, server->client,
608 msg, args, res, cache_reply);
cccef3b9
AA		 609}
610
611#endif /* CONFIG_NFS_V4_1 */
612
613int _nfs4_call_sync(struct nfs_server *server,
614 struct rpc_message *msg,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 int cache_reply)
618{
f3752975 619 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 620 return rpc_call_sync(server->client, msg, 0);
621}
622
623#define nfs4_call_sync(server, msg, args, res, cache_reply) \
624 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
625 &(res)->seq_res, (cache_reply))
626
b0df806c
AA		 627static void nfs4_sequence_done(const struct nfs_server *server,
628 struct nfs4_sequence_res *res, int rpc_status)
629{
630#ifdef CONFIG_NFS_V4_1
631 if (nfs4_has_session(server->nfs_client))
632 nfs41_sequence_done(server->nfs_client, res, rpc_status);
633#endif /* CONFIG_NFS_V4_1 */
634}
635
636/* no restart, therefore free slot here */
637static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
638 struct nfs4_sequence_res *res,
639 int rpc_status)
640{
641 nfs4_sequence_done(server, res, rpc_status);
642 nfs4_sequence_free_slot(server->nfs_client, res);
643}
644
38478b24 645static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 646{
38478b24 647 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 648
38478b24 649 spin_lock(&dir->i_lock);
40d24704
TM		 650 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
651 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 652 nfs_force_lookup_revalidate(dir);
40d24704 653 nfsi->change_attr = cinfo->after;
38478b24 654 spin_unlock(&dir->i_lock);
1da177e4
LT		 655}
656
e56e0b78 657struct nfs4_opendata {
c6d00e63 658 struct kref kref;
e56e0b78
TM		 659 struct nfs_openargs o_arg;
660 struct nfs_openres o_res;
cdd4e68b
TM		 661 struct nfs_open_confirmargs c_arg;
662 struct nfs_open_confirmres c_res;
e56e0b78
TM		 663 struct nfs_fattr f_attr;
664 struct nfs_fattr dir_attr;
ad389da7 665 struct path path;
e56e0b78
TM		 666 struct dentry *dir;
667 struct nfs4_state_owner *owner;
aac00a8d 668 struct nfs4_state *state;
e56e0b78 669 struct iattr attrs;
26e976a8 670 unsigned long timestamp;
3e309914 671 unsigned int rpc_done : 1;
24ac23ab
TM		 672 int rpc_status;
673 int cancelled;
e56e0b78
TM		 674};
675
2ced46c2
TM		 676
677static void nfs4_init_opendata_res(struct nfs4_opendata *p)
678{
679 p->o_res.f_attr = &p->f_attr;
680 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 681 p->o_res.seqid = p->o_arg.seqid;
682 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 683 p->o_res.server = p->o_arg.server;
684 nfs_fattr_init(&p->f_attr);
685 nfs_fattr_init(&p->dir_attr);
578e4585 686 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 687}
688
ad389da7 689static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 690 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 691 const struct iattr *attrs)
692{
ad389da7 693 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 694 struct inode *dir = parent->d_inode;
695 struct nfs_server *server = NFS_SERVER(dir);
696 struct nfs4_opendata *p;
697
698 p = kzalloc(sizeof(*p), GFP_KERNEL);
699 if (p == NULL)
700 goto err;
701 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
702 if (p->o_arg.seqid == NULL)
703 goto err_free;
ad389da7
TM		 704 p->path.mnt = mntget(path->mnt);
705 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 706 p->dir = parent;
707 p->owner = sp;
708 atomic_inc(&sp->so_count);
709 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 710 p->o_arg.open_flags = flags;
711 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 712 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 713 p->o_arg.id = sp->so_owner_id.id;
ad389da7 714 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 715 p->o_arg.server = server;
716 p->o_arg.bitmask = server->attr_bitmask;
717 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
e56e0b78
TM		 718 if (flags & O_EXCL) {
719 u32 *s = (u32 *) p->o_arg.u.verifier.data;
720 s[0] = jiffies;
721 s[1] = current->pid;
722 } else if (flags & O_CREAT) {
723 p->o_arg.u.attrs = &p->attrs;
724 memcpy(&p->attrs, attrs, sizeof(p->attrs));
725 }
cdd4e68b
TM		 726 p->c_arg.fh = &p->o_res.fh;
727 p->c_arg.stateid = &p->o_res.stateid;
728 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 729 nfs4_init_opendata_res(p);
c6d00e63 730 kref_init(&p->kref);
e56e0b78
TM		 731 return p;
732err_free:
733 kfree(p);
734err:
735 dput(parent);
736 return NULL;
737}
738
c6d00e63 739static void nfs4_opendata_free(struct kref *kref)
e56e0b78 740{
c6d00e63
TM		 741 struct nfs4_opendata *p = container_of(kref,
742 struct nfs4_opendata, kref);
743
744 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 745 if (p->state != NULL)
746 nfs4_put_open_state(p->state);
c6d00e63
TM		 747 nfs4_put_state_owner(p->owner);
748 dput(p->dir);
31f31db1 749 path_put(&p->path);
c6d00e63
TM		 750 kfree(p);
751}
752
753static void nfs4_opendata_put(struct nfs4_opendata *p)
754{
755 if (p != NULL)
756 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 757}
758
06f814a3
TM		 759static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
760{
06f814a3
TM		 761 int ret;
762
06f814a3 763 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 764 return ret;
765}
766
dc0b027d 767static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 768{
769 int ret = 0;
dc0b027d
TM		 770
771 if (open_mode & O_EXCL)
772 goto out;
773 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 774 case FMODE_READ:
775 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 776 break;
777 case FMODE_WRITE:
778 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 779 break;
780 case FMODE_READ|FMODE_WRITE:
781 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
782 }
dc0b027d 783out:
6ee41268
TM		 784 return ret;
785}
786
dc0b027d 787static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 788{
dc0b027d 789 if ((delegation->type & fmode) != fmode)
aac00a8d 790 return 0;
15c831bf 791 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 792 return 0;
b7391f44 793 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 794 return 1;
795}
796
dc0b027d 797static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 798{
dc0b027d 799 switch (fmode) {
e7616923
TM		 800 case FMODE_WRITE:
801 state->n_wronly++;
802 break;
803 case FMODE_READ:
804 state->n_rdonly++;
805 break;
806 case FMODE_READ|FMODE_WRITE:
807 state->n_rdwr++;
808 }
dc0b027d 809 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 810}
811
dc0b027d 812static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 813{
814 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
815 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
816 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 817 switch (fmode) {
003707c7
TM		 818 case FMODE_READ:
819 set_bit(NFS_O_RDONLY_STATE, &state->flags);
820 break;
821 case FMODE_WRITE:
822 set_bit(NFS_O_WRONLY_STATE, &state->flags);
823 break;
824 case FMODE_READ|FMODE_WRITE:
825 set_bit(NFS_O_RDWR_STATE, &state->flags);
826 }
e7616923
TM		 827}
828
dc0b027d 829static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 830{
8bda4e4c 831 write_seqlock(&state->seqlock);
dc0b027d 832 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 833 write_sequnlock(&state->seqlock);
003707c7
TM		 834}
835
dc0b027d 836static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 837{
8bda4e4c
TM		 838 /*
839 * Protect the call to nfs4_state_set_mode_locked and
840 * serialise the stateid update
841 */
842 write_seqlock(&state->seqlock);
003707c7
TM		 843 if (deleg_stateid != NULL) {
844 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
845 set_bit(NFS_DELEGATED_STATE, &state->flags);
846 }
847 if (open_stateid != NULL)
dc0b027d 848 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 849 write_sequnlock(&state->seqlock);
850 spin_lock(&state->owner->so_lock);
dc0b027d 851 update_open_stateflags(state, fmode);
ec073428 852 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 853}
854
dc0b027d 855static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 856{
857 struct nfs_inode *nfsi = NFS_I(state->inode);
858 struct nfs_delegation *deleg_cur;
859 int ret = 0;
860
dc0b027d 861 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 862
863 rcu_read_lock();
864 deleg_cur = rcu_dereference(nfsi->delegation);
865 if (deleg_cur == NULL)
866 goto no_delegation;
867
868 spin_lock(&deleg_cur->lock);
869 if (nfsi->delegation != deleg_cur ||
dc0b027d 870 (deleg_cur->type & fmode) != fmode)
34310430
TM		 871 goto no_delegation_unlock;
872
873 if (delegation == NULL)
874 delegation = &deleg_cur->stateid;
875 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
876 goto no_delegation_unlock;
877
b7391f44 878 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 879 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 880 ret = 1;
881no_delegation_unlock:
882 spin_unlock(&deleg_cur->lock);
883no_delegation:
884 rcu_read_unlock();
885
886 if (!ret && open_stateid != NULL) {
dc0b027d 887 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 888 ret = 1;
889 }
890
891 return ret;
892}
893
894
dc0b027d 895static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 896{
897 struct nfs_delegation *delegation;
898
899 rcu_read_lock();
900 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 901 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 902 rcu_read_unlock();
903 return;
904 }
905 rcu_read_unlock();
906 nfs_inode_return_delegation(inode);
907}
908
6ee41268 909static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 910{
911 struct nfs4_state *state = opendata->state;
912 struct nfs_inode *nfsi = NFS_I(state->inode);
913 struct nfs_delegation *delegation;
dc0b027d
TM		 914 int open_mode = opendata->o_arg.open_flags & O_EXCL;
915 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 916 nfs4_stateid stateid;
917 int ret = -EAGAIN;
918
aac00a8d 919 for (;;) {
dc0b027d 920 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 921 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 922 if (can_open_cached(state, fmode, open_mode)) {
923 update_open_stateflags(state, fmode);
6ee41268 924 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 925 goto out_return_state;
926 }
927 spin_unlock(&state->owner->so_lock);
928 }
34310430
TM		 929 rcu_read_lock();
930 delegation = rcu_dereference(nfsi->delegation);
931 if (delegation == NULL ||
dc0b027d 932 !can_open_delegated(delegation, fmode)) {
34310430 933 rcu_read_unlock();
aac00a8d 934 break;
34310430 935 }
aac00a8d
TM		 936 /* Save the delegation */
937 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
938 rcu_read_unlock();
af22f94a 939 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 940 if (ret != 0)
941 goto out;
942 ret = -EAGAIN;
34310430
TM		 943
944 /* Try to update the stateid using the delegation */
dc0b027d 945 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 946 goto out_return_state;
aac00a8d 947 }
aac00a8d
TM		 948out:
949 return ERR_PTR(ret);
950out_return_state:
951 atomic_inc(&state->count);
952 return state;
953}
954
24ac23ab
TM		 955static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
956{
957 struct inode *inode;
958 struct nfs4_state *state = NULL;
003707c7 959 struct nfs_delegation *delegation;
1b370bc2 960 int ret;
24ac23ab 961
aac00a8d 962 if (!data->rpc_done) {
6ee41268 963 state = nfs4_try_open_cached(data);
aac00a8d
TM		 964 goto out;
965 }
966
1b370bc2 967 ret = -EAGAIN;
24ac23ab 968 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 969 goto err;
24ac23ab 970 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 971 ret = PTR_ERR(inode);
03f28e3a 972 if (IS_ERR(inode))
1b370bc2
TM		 973 goto err;
974 ret = -ENOMEM;
24ac23ab
TM		 975 state = nfs4_get_open_state(inode, data->owner);
976 if (state == NULL)
1b370bc2 977 goto err_put_inode;
549d6ed5 978 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 979 int delegation_flags = 0;
980
003707c7
TM		 981 rcu_read_lock();
982 delegation = rcu_dereference(NFS_I(inode)->delegation);
983 if (delegation)
984 delegation_flags = delegation->flags;
985 rcu_read_unlock();
15c831bf 986 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 987 nfs_inode_set_delegation(state->inode,
988 data->owner->so_cred,
989 &data->o_res);
990 else
991 nfs_inode_reclaim_delegation(state->inode,
992 data->owner->so_cred,
993 &data->o_res);
994 }
34310430
TM		 995
996 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 997 data->o_arg.fmode);
24ac23ab 998 iput(inode);
aac00a8d 999out:
24ac23ab 1000 return state;
1b370bc2
TM		 1001err_put_inode:
1002 iput(inode);
1003err:
1004 return ERR_PTR(ret);
24ac23ab
TM		 1005}
1006
864472e9
TM		 1007static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1008{
1009 struct nfs_inode *nfsi = NFS_I(state->inode);
1010 struct nfs_open_context *ctx;
1011
1012 spin_lock(&state->inode->i_lock);
1013 list_for_each_entry(ctx, &nfsi->open_files, list) {
1014 if (ctx->state != state)
1015 continue;
1016 get_nfs_open_context(ctx);
1017 spin_unlock(&state->inode->i_lock);
1018 return ctx;
1019 }
1020 spin_unlock(&state->inode->i_lock);
1021 return ERR_PTR(-ENOENT);
1022}
1023
6f220ed5
TM		 1024static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1025{
1026 struct nfs4_opendata *opendata;
1027
dc0b027d 1028 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1029 if (opendata == NULL)
1030 return ERR_PTR(-ENOMEM);
1031 opendata->state = state;
1032 atomic_inc(&state->count);
1033 return opendata;
1034}
1035
dc0b027d 1036static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1037{
2ced46c2 1038 struct nfs4_state *newstate;
864472e9
TM		 1039 int ret;
1040
dc0b027d
TM		 1041 opendata->o_arg.open_flags = 0;
1042 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1043 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1044 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1045 nfs4_init_opendata_res(opendata);
864472e9
TM		 1046 ret = _nfs4_proc_open(opendata);
1047 if (ret != 0)
1048 return ret;
2ced46c2 1049 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1050 if (IS_ERR(newstate))
1051 return PTR_ERR(newstate);
dc0b027d 1052 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1053 *res = newstate;
864472e9
TM		 1054 return 0;
1055}
1056
1057static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1058{
864472e9 1059 struct nfs4_state *newstate;
864472e9
TM		 1060 int ret;
1061
1062 /* memory barrier prior to reading state->n_* */
2ced46c2 1063 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1064 smp_rmb();
1065 if (state->n_rdwr != 0) {
2ced46c2 1066 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1067 if (ret != 0)
1068 return ret;
2ced46c2
TM		 1069 if (newstate != state)
1070 return -ESTALE;
864472e9
TM		 1071 }
1072 if (state->n_wronly != 0) {
2ced46c2 1073 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1074 if (ret != 0)
1075 return ret;
2ced46c2
TM		 1076 if (newstate != state)
1077 return -ESTALE;
864472e9
TM		 1078 }
1079 if (state->n_rdonly != 0) {
2ced46c2 1080 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1081 if (ret != 0)
1082 return ret;
2ced46c2
TM		 1083 if (newstate != state)
1084 return -ESTALE;
864472e9 1085 }
1ac7e2fd
TM		 1086 /*
1087 * We may have performed cached opens for all three recoveries.
1088 * Check if we need to update the current stateid.
1089 */
1090 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1091 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1092 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1093 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1094 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1095 write_sequnlock(&state->seqlock);
1ac7e2fd 1096 }
864472e9
TM		 1097 return 0;
1098}
1099
1da177e4
LT		 1100/*
1101 * OPEN_RECLAIM:
1102 * reclaim state on the server after a reboot.
1da177e4 1103 */
539cd03a 1104static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1105{
1ac7e2fd 1106 struct nfs_delegation *delegation;
864472e9 1107 struct nfs4_opendata *opendata;
dc0b027d 1108 fmode_t delegation_type = 0;
1da177e4
LT		 1109 int status;
1110
6f220ed5
TM		 1111 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1112 if (IS_ERR(opendata))
1113 return PTR_ERR(opendata);
864472e9
TM		 1114 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1115 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1116 rcu_read_lock();
1117 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1118 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1119 delegation_type = delegation->type;
1ac7e2fd 1120 rcu_read_unlock();
864472e9
TM		 1121 opendata->o_arg.u.delegation_type = delegation_type;
1122 status = nfs4_open_recover(opendata, state);
c6d00e63 1123 nfs4_opendata_put(opendata);
1da177e4
LT		 1124 return status;
1125}
1126
539cd03a 1127static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1128{
1129 struct nfs_server *server = NFS_SERVER(state->inode);
1130 struct nfs4_exception exception = { };
1131 int err;
1132 do {
539cd03a 1133 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1134 if (err != -NFS4ERR_DELAY)
1135 break;
1136 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1137 } while (exception.retry);
1138 return err;
1139}
1140
864472e9
TM		 1141static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1142{
1143 struct nfs_open_context *ctx;
1144 int ret;
1145
1146 ctx = nfs4_state_find_open_context(state);
1147 if (IS_ERR(ctx))
1148 return PTR_ERR(ctx);
539cd03a 1149 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1150 put_nfs_open_context(ctx);
1151 return ret;
1152}
1153
13437e12 1154static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1155{
e56e0b78 1156 struct nfs4_opendata *opendata;
864472e9 1157 int ret;
1da177e4 1158
6f220ed5
TM		 1159 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1160 if (IS_ERR(opendata))
1161 return PTR_ERR(opendata);
e56e0b78 1162 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1163 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1164 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1165 ret = nfs4_open_recover(opendata, state);
c6d00e63 1166 nfs4_opendata_put(opendata);
864472e9 1167 return ret;
1da177e4
LT		 1168}
1169
13437e12 1170int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1171{
1172 struct nfs4_exception exception = { };
539cd03a 1173 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1174 int err;
1175 do {
13437e12 1176 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1177 switch (err) {
1178 case 0:
965b5d67
TM		 1179 case -ENOENT:
1180 case -ESTALE:
1181 goto out;
1da177e4
LT		 1182 case -NFS4ERR_STALE_CLIENTID:
1183 case -NFS4ERR_STALE_STATEID:
1184 case -NFS4ERR_EXPIRED:
1185 /* Don't recall a delegation if it was lost */
7539bbab 1186 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1187 goto out;
1188 case -ERESTARTSYS:
1189 /*
1190 * The show must go on: exit, but mark the
1191 * stateid as needing recovery.
1192 */
1193 case -NFS4ERR_ADMIN_REVOKED:
1194 case -NFS4ERR_BAD_STATEID:
1195 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1196 case -ENOMEM:
1197 err = 0;
1198 goto out;
1da177e4
LT		 1199 }
1200 err = nfs4_handle_exception(server, err, &exception);
1201 } while (exception.retry);
965b5d67 1202out:
1da177e4
LT		 1203 return err;
1204}
1205
cdd4e68b
TM		 1206static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1207{
1208 struct nfs4_opendata *data = calldata;
1209
1210 data->rpc_status = task->tk_status;
1211 if (RPC_ASSASSINATED(task))
1212 return;
26e976a8 1213 if (data->rpc_status == 0) {
cdd4e68b
TM		 1214 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1215 sizeof(data->o_res.stateid.data));
bb22629e 1216 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1217 renew_lease(data->o_res.server, data->timestamp);
3e309914 1218 data->rpc_done = 1;
26e976a8 1219 }
cdd4e68b
TM		 1220}
1221
1222static void nfs4_open_confirm_release(void *calldata)
1223{
1224 struct nfs4_opendata *data = calldata;
1225 struct nfs4_state *state = NULL;
1226
1227 /* If this request hasn't been cancelled, do nothing */
1228 if (data->cancelled == 0)
1229 goto out_free;
1230 /* In case of error, no cleanup! */
3e309914 1231 if (!data->rpc_done)
cdd4e68b 1232 goto out_free;
cdd4e68b 1233 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1234 if (!IS_ERR(state))
dc0b027d 1235 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1236out_free:
c6d00e63 1237 nfs4_opendata_put(data);
cdd4e68b
TM		 1238}
1239
1240static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1241 .rpc_call_done = nfs4_open_confirm_done,
1242 .rpc_release = nfs4_open_confirm_release,
1243};
1244
1245/*
1246 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1247 */
1248static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1249{
1250 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1251 struct rpc_task *task;
5138fde0
TM		 1252 struct rpc_message msg = {
1253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1254 .rpc_argp = &data->c_arg,
1255 .rpc_resp = &data->c_res,
1256 .rpc_cred = data->owner->so_cred,
1257 };
c970aa85
TM		 1258 struct rpc_task_setup task_setup_data = {
1259 .rpc_client = server->client,
5138fde0 1260 .rpc_message = &msg,
c970aa85
TM		 1261 .callback_ops = &nfs4_open_confirm_ops,
1262 .callback_data = data,
101070ca 1263 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1264 .flags = RPC_TASK_ASYNC,
1265 };
1da177e4
LT		 1266 int status;
1267
c6d00e63 1268 kref_get(&data->kref);
3e309914
TM		 1269 data->rpc_done = 0;
1270 data->rpc_status = 0;
5138fde0 1271 data->timestamp = jiffies;
c970aa85 1272 task = rpc_run_task(&task_setup_data);
7a1218a2 1273 if (IS_ERR(task))
cdd4e68b 1274 return PTR_ERR(task);
cdd4e68b
TM		 1275 status = nfs4_wait_for_completion_rpc_task(task);
1276 if (status != 0) {
1277 data->cancelled = 1;
1278 smp_wmb();
1279 } else
1280 status = data->rpc_status;
e6b3c4db 1281 rpc_put_task(task);
1da177e4
LT		 1282 return status;
1283}
1284
24ac23ab 1285static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1286{
24ac23ab
TM		 1287 struct nfs4_opendata *data = calldata;
1288 struct nfs4_state_owner *sp = data->owner;
5138fde0 1289
24ac23ab
TM		 1290 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1291 return;
aac00a8d
TM		 1292 /*
1293 * Check if we still need to send an OPEN call, or if we can use
1294 * a delegation instead.
1295 */
1296 if (data->state != NULL) {
1297 struct nfs_delegation *delegation;
1298
dc0b027d 1299 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1300 goto out_no_action;
aac00a8d
TM		 1301 rcu_read_lock();
1302 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1303 if (delegation != NULL &&
15c831bf 1304 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1305 rcu_read_unlock();
6ee41268 1306 goto out_no_action;
aac00a8d
TM		 1307 }
1308 rcu_read_unlock();
1309 }
24ac23ab 1310 /* Update sequence id. */
9f958ab8 1311 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1312 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1313 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1314 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1315 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1316 }
26e976a8 1317 data->timestamp = jiffies;
d898528c
AA		 1318 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1319 &data->o_arg.seq_args,
1320 &data->o_res.seq_res, 1, task))
1321 return;
5138fde0 1322 rpc_call_start(task);
6ee41268
TM		 1323 return;
1324out_no_action:
1325 task->tk_action = NULL;
1326
24ac23ab 1327}
1da177e4 1328
24ac23ab
TM		 1329static void nfs4_open_done(struct rpc_task *task, void *calldata)
1330{
1331 struct nfs4_opendata *data = calldata;
1da177e4 1332
24ac23ab 1333 data->rpc_status = task->tk_status;
d898528c
AA		 1334
1335 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1336 task->tk_status);
1337
24ac23ab
TM		 1338 if (RPC_ASSASSINATED(task))
1339 return;
1340 if (task->tk_status == 0) {
1341 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1342 case S_IFREG:
1343 break;
1344 case S_IFLNK:
24ac23ab 1345 data->rpc_status = -ELOOP;
6f926b5b
TM		 1346 break;
1347 case S_IFDIR:
24ac23ab 1348 data->rpc_status = -EISDIR;
6f926b5b
TM		 1349 break;
1350 default:
24ac23ab 1351 data->rpc_status = -ENOTDIR;
6f926b5b 1352 }
26e976a8 1353 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1354 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1355 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1356 }
3e309914 1357 data->rpc_done = 1;
24ac23ab 1358}
6f926b5b 1359
24ac23ab
TM		 1360static void nfs4_open_release(void *calldata)
1361{
1362 struct nfs4_opendata *data = calldata;
1363 struct nfs4_state *state = NULL;
1364
1365 /* If this request hasn't been cancelled, do nothing */
1366 if (data->cancelled == 0)
1367 goto out_free;
1368 /* In case of error, no cleanup! */
3e309914 1369 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1370 goto out_free;
1371 /* In case we need an open_confirm, no cleanup! */
1372 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1373 goto out_free;
24ac23ab 1374 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1375 if (!IS_ERR(state))
dc0b027d 1376 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1377out_free:
c6d00e63 1378 nfs4_opendata_put(data);
24ac23ab
TM		 1379}
1380
1381static const struct rpc_call_ops nfs4_open_ops = {
1382 .rpc_call_prepare = nfs4_open_prepare,
1383 .rpc_call_done = nfs4_open_done,
1384 .rpc_release = nfs4_open_release,
1385};
1386
1387/*
1388 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1389 */
1390static int _nfs4_proc_open(struct nfs4_opendata *data)
1391{
1392 struct inode *dir = data->dir->d_inode;
1393 struct nfs_server *server = NFS_SERVER(dir);
1394 struct nfs_openargs *o_arg = &data->o_arg;
1395 struct nfs_openres *o_res = &data->o_res;
1396 struct rpc_task *task;
5138fde0
TM		 1397 struct rpc_message msg = {
1398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1399 .rpc_argp = o_arg,
1400 .rpc_resp = o_res,
1401 .rpc_cred = data->owner->so_cred,
1402 };
c970aa85
TM		 1403 struct rpc_task_setup task_setup_data = {
1404 .rpc_client = server->client,
5138fde0 1405 .rpc_message = &msg,
c970aa85
TM		 1406 .callback_ops = &nfs4_open_ops,
1407 .callback_data = data,
101070ca 1408 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1409 .flags = RPC_TASK_ASYNC,
1410 };
24ac23ab
TM		 1411 int status;
1412
c6d00e63 1413 kref_get(&data->kref);
3e309914
TM		 1414 data->rpc_done = 0;
1415 data->rpc_status = 0;
2ced46c2 1416 data->cancelled = 0;
c970aa85 1417 task = rpc_run_task(&task_setup_data);
7a1218a2 1418 if (IS_ERR(task))
24ac23ab 1419 return PTR_ERR(task);
24ac23ab
TM		 1420 status = nfs4_wait_for_completion_rpc_task(task);
1421 if (status != 0) {
1422 data->cancelled = 1;
1423 smp_wmb();
1424 } else
1425 status = data->rpc_status;
e6b3c4db 1426 rpc_put_task(task);
3e309914 1427 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1428 return status;
1429
9936781d
TM		 1430 if (o_res->fh.size == 0)
1431 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1432
56ae19f3
TM		 1433 if (o_arg->open_flags & O_CREAT) {
1434 update_changeattr(dir, &o_res->cinfo);
1435 nfs_post_op_update_inode(dir, o_res->dir_attr);
1436 } else
1437 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1438 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1439 status = _nfs4_proc_open_confirm(data);
1da177e4 1440 if (status != 0)
24ac23ab 1441 return status;
1da177e4
LT		 1442 }
1443 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1444 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1445 return 0;
1da177e4
LT		 1446}
1447
10afec90 1448static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1449{
7539bbab 1450 struct nfs_client *clp = server->nfs_client;
a78cb57a 1451 unsigned int loop;
6b30954e 1452 int ret;
58d9714a 1453
a78cb57a 1454 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
65de872e 1455 ret = nfs4_wait_clnt_recover(clp);
6b30954e 1456 if (ret != 0)
a78cb57a 1457 break;
e598d843
TM		 1458 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1459 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1460 break;
58d9714a 1461 nfs4_schedule_state_recovery(clp);
a78cb57a 1462 ret = -EIO;
6b30954e 1463 }
a78cb57a 1464 return ret;
58d9714a
TM		 1465}
1466
1da177e4
LT		 1467/*
1468 * OPEN_EXPIRED:
1469 * reclaim state on the server after a network partition.
1470 * Assumes caller holds the appropriate lock
1471 */
539cd03a 1472static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1473{
e56e0b78 1474 struct nfs4_opendata *opendata;
864472e9 1475 int ret;
1da177e4 1476
6f220ed5
TM		 1477 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1478 if (IS_ERR(opendata))
1479 return PTR_ERR(opendata);
864472e9 1480 ret = nfs4_open_recover(opendata, state);
35d05778 1481 if (ret == -ESTALE)
539cd03a 1482 d_drop(ctx->path.dentry);
c6d00e63 1483 nfs4_opendata_put(opendata);
864472e9 1484 return ret;
1da177e4
LT		 1485}
1486
539cd03a 1487static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1488{
539cd03a 1489 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1490 struct nfs4_exception exception = { };
1491 int err;
1492
1493 do {
539cd03a 1494 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1495 if (err != -NFS4ERR_DELAY)
1496 break;
1497 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1498 } while (exception.retry);
1499 return err;
1500}
1501
1da177e4
LT		 1502static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1503{
1da177e4 1504 struct nfs_open_context *ctx;
864472e9 1505 int ret;
1da177e4 1506
864472e9
TM		 1507 ctx = nfs4_state_find_open_context(state);
1508 if (IS_ERR(ctx))
1509 return PTR_ERR(ctx);
539cd03a 1510 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1511 put_nfs_open_context(ctx);
1512 return ret;
1da177e4
LT		 1513}
1514
aa53ed54
JL		 1515/*
1516 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1517 * fields corresponding to attributes that were used to store the verifier.
1518 * Make sure we clobber those fields in the later setattr call
1519 */
1520static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1521{
1522 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1523 !(sattr->ia_valid & ATTR_ATIME_SET))
1524 sattr->ia_valid |= ATTR_ATIME;
1525
1526 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1527 !(sattr->ia_valid & ATTR_MTIME_SET))
1528 sattr->ia_valid |= ATTR_MTIME;
1529}
1530
1da177e4 1531/*
24ac23ab 1532 * Returns a referenced nfs4_state
1da177e4 1533 */
dc0b027d 1534static 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		 1535{
1536 struct nfs4_state_owner *sp;
1537 struct nfs4_state *state = NULL;
1538 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1539 struct nfs4_opendata *opendata;
aac00a8d 1540 int status;
1da177e4
LT		 1541
1542 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1543 status = -ENOMEM;
1544 if (!(sp = nfs4_get_state_owner(server, cred))) {
1545 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1546 goto out_err;
1547 }
58d9714a
TM		 1548 status = nfs4_recover_expired_lease(server);
1549 if (status != 0)
b4454fe1 1550 goto err_put_state_owner;
aac00a8d 1551 if (path->dentry->d_inode != NULL)
dc0b027d 1552 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1553 status = -ENOMEM;
dc0b027d 1554 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1555 if (opendata == NULL)
95d35cb4 1556 goto err_put_state_owner;
1da177e4 1557
aac00a8d
TM		 1558 if (path->dentry->d_inode != NULL)
1559 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1560
24ac23ab 1561 status = _nfs4_proc_open(opendata);
1da177e4 1562 if (status != 0)
c6d00e63 1563 goto err_opendata_put;
1da177e4 1564
aa53ed54
JL		 1565 if (opendata->o_arg.open_flags & O_EXCL)
1566 nfs4_exclusive_attrset(opendata, sattr);
1567
24ac23ab 1568 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1569 status = PTR_ERR(state);
1570 if (IS_ERR(state))
c6d00e63 1571 goto err_opendata_put;
c6d00e63 1572 nfs4_opendata_put(opendata);
1da177e4 1573 nfs4_put_state_owner(sp);
1da177e4
LT		 1574 *res = state;
1575 return 0;
c6d00e63
TM		 1576err_opendata_put:
1577 nfs4_opendata_put(opendata);
e56e0b78
TM		 1578err_put_state_owner:
1579 nfs4_put_state_owner(sp);
1da177e4 1580out_err:
1da177e4
LT		 1581 *res = NULL;
1582 return status;
1583}
1584
1585
dc0b027d 1586static 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		 1587{
1588 struct nfs4_exception exception = { };
1589 struct nfs4_state *res;
1590 int status;
1591
1592 do {
dc0b027d 1593 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1594 if (status == 0)
1595 break;
1596 /* NOTE: BAD_SEQID means the server and client disagree about the
1597 * book-keeping w.r.t. state-changing operations
1598 * (OPEN/CLOSE/LOCK/LOCKU...)
1599 * It is actually a sign of a bug on the client or on the server.
1600 *
1601 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1602 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1603 * have unhashed the old state_owner for us, and that we can
1604 * therefore safely retry using a new one. We should still warn
1605 * the user though...
1606 */
1607 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1608 printk(KERN_WARNING "NFS: v4 server %s "
1609 " returned a bad sequence-id error!\n",
1610 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1611 exception.retry = 1;
1612 continue;
1613 }
550f5747
TM		 1614 /*
1615 * BAD_STATEID on OPEN means that the server cancelled our
1616 * state before it received the OPEN_CONFIRM.
1617 * Recover by retrying the request as per the discussion
1618 * on Page 181 of RFC3530.
1619 */
1620 if (status == -NFS4ERR_BAD_STATEID) {
1621 exception.retry = 1;
1622 continue;
1623 }
aac00a8d
TM		 1624 if (status == -EAGAIN) {
1625 /* We must have found a delegation */
1626 exception.retry = 1;
1627 continue;
1628 }
1da177e4
LT		 1629 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1630 status, &exception));
1631 } while (exception.retry);
1632 return res;
1633}
1634
659bfcd6
TM		 1635static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1636 struct nfs_fattr *fattr, struct iattr *sattr,
1637 struct nfs4_state *state)
1da177e4 1638{
3e4f6290 1639 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1640 struct nfs_setattrargs arg = {
3e4f6290 1641 .fh = NFS_FH(inode),
1da177e4
LT		 1642 .iap = sattr,
1643 .server = server,
1644 .bitmask = server->attr_bitmask,
1645 };
1646 struct nfs_setattrres res = {
1647 .fattr = fattr,
1648 .server = server,
1649 };
1650 struct rpc_message msg = {
659bfcd6
TM		 1651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1652 .rpc_argp = &arg,
1653 .rpc_resp = &res,
1654 .rpc_cred = cred,
1da177e4 1655 };
26e976a8 1656 unsigned long timestamp = jiffies;
65e4308d 1657 int status;
1da177e4 1658
0e574af1 1659 nfs_fattr_init(fattr);
1da177e4 1660
3e4f6290
TM		 1661 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1662 /* Use that stateid */
1663 } else if (state != NULL) {
08e9eac4
TM		 1664 nfs4_copy_stateid(&arg.stateid, state, current->files);
1665 } else
1da177e4
LT		 1666 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1667
cccef3b9 1668 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1669 if (status == 0 && state != NULL)
1670 renew_lease(server, timestamp);
65e4308d 1671 return status;
1da177e4
LT		 1672}
1673
659bfcd6
TM		 1674static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1675 struct nfs_fattr *fattr, struct iattr *sattr,
1676 struct nfs4_state *state)
1da177e4 1677{
3e4f6290 1678 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1679 struct nfs4_exception exception = { };
1680 int err;
1681 do {
1682 err = nfs4_handle_exception(server,
659bfcd6 1683 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1684 &exception);
1685 } while (exception.retry);
1686 return err;
1687}
1688
1689struct nfs4_closedata {
4a35bd41 1690 struct path path;
1da177e4
LT		 1691 struct inode *inode;
1692 struct nfs4_state *state;
1693 struct nfs_closeargs arg;
1694 struct nfs_closeres res;
516a6af6 1695 struct nfs_fattr fattr;
26e976a8 1696 unsigned long timestamp;
1da177e4
LT		 1697};
1698
963d8fe5 1699static void nfs4_free_closedata(void *data)
9512135d 1700{
963d8fe5
TM		 1701 struct nfs4_closedata *calldata = data;
1702 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1703
1704 nfs4_put_open_state(calldata->state);
1705 nfs_free_seqid(calldata->arg.seqid);
9512135d 1706 nfs4_put_state_owner(sp);
31f31db1 1707 path_put(&calldata->path);
9512135d
TM		 1708 kfree(calldata);
1709}
1710
963d8fe5 1711static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1712{
963d8fe5 1713 struct nfs4_closedata *calldata = data;
1da177e4 1714 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1715 struct nfs_server *server = NFS_SERVER(calldata->inode);
1716
19ddab06 1717 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1718 if (RPC_ASSASSINATED(task))
1719 return;
1da177e4
LT		 1720 /* hmm. we are done with the inode, and in the process of freeing
1721 * the state_owner. we keep this around to process errors
1722 */
1da177e4
LT		 1723 switch (task->tk_status) {
1724 case 0:
45328c35 1725 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1726 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1727 break;
1728 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1729 case -NFS4ERR_OLD_STATEID:
1730 case -NFS4ERR_BAD_STATEID:
1da177e4 1731 case -NFS4ERR_EXPIRED:
dc0b027d 1732 if (calldata->arg.fmode == 0)
9e33bed5 1733 break;
1da177e4 1734 default:
9e33bed5 1735 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1736 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1737 return;
1738 }
1739 }
19ddab06 1740 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1741 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1742}
1743
4ce70ada 1744static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1745{
4ce70ada 1746 struct nfs4_closedata *calldata = data;
9512135d 1747 struct nfs4_state *state = calldata->state;
003707c7 1748 int clear_rd, clear_wr, clear_rdwr;
9512135d 1749
963d8fe5 1750 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1751 return;
003707c7 1752
003707c7 1753 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1754 spin_lock(&state->owner->so_lock);
003707c7 1755 /* Calculate the change in open mode */
e7616923 1756 if (state->n_rdwr == 0) {
003707c7 1757 if (state->n_rdonly == 0) {
003707c7
TM		 1758 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1759 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1760 }
1761 if (state->n_wronly == 0) {
003707c7
TM		 1762 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1763 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1764 }
e7616923 1765 }
4cecb76f 1766 spin_unlock(&state->owner->so_lock);
003707c7 1767 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1768 /* Note: exit _without_ calling nfs4_close_done */
1769 task->tk_action = NULL;
9512135d
TM		 1770 return;
1771 }
516a6af6 1772 nfs_fattr_init(calldata->res.fattr);
45328c35 1773 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1774 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1775 calldata->arg.fmode = FMODE_READ;
45328c35 1776 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1777 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1778 calldata->arg.fmode = FMODE_WRITE;
45328c35 1779 }
26e976a8 1780 calldata->timestamp = jiffies;
19ddab06
AA		 1781 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1782 &calldata->arg.seq_args, &calldata->res.seq_res,
1783 1, task))
1784 return;
5138fde0 1785 rpc_call_start(task);
1da177e4
LT		 1786}
1787
963d8fe5 1788static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1789 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1790 .rpc_call_done = nfs4_close_done,
1791 .rpc_release = nfs4_free_closedata,
1792};
1793
1da177e4
LT		 1794/*
1795 * It is possible for data to be read/written from a mem-mapped file
1796 * after the sys_close call (which hits the vfs layer as a flush).
1797 * This means that we can't safely call nfsv4 close on a file until
1798 * the inode is cleared. This in turn means that we are not good
1799 * NFSv4 citizens - we do not indicate to the server to update the file's
1800 * share state even when we are done with one of the three share
1801 * stateid's in the inode.
1802 *
1803 * NOTE: Caller must be holding the sp->so_owner semaphore!
1804 */
a49c3c77 1805int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1806{
4a35bd41 1807 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1808 struct nfs4_closedata *calldata;
b39e625b
TM		 1809 struct nfs4_state_owner *sp = state->owner;
1810 struct rpc_task *task;
5138fde0
TM		 1811 struct rpc_message msg = {
1812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1813 .rpc_cred = state->owner->so_cred,
1814 };
c970aa85
TM		 1815 struct rpc_task_setup task_setup_data = {
1816 .rpc_client = server->client,
5138fde0 1817 .rpc_message = &msg,
c970aa85 1818 .callback_ops = &nfs4_close_ops,
101070ca 1819 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1820 .flags = RPC_TASK_ASYNC,
1821 };
9512135d 1822 int status = -ENOMEM;
1da177e4 1823
19ddab06 1824 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1825 if (calldata == NULL)
9512135d 1826 goto out;
4a35bd41 1827 calldata->inode = state->inode;
1da177e4 1828 calldata->state = state;
4a35bd41 1829 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1830 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1831 if (nfs4_has_session(server->nfs_client))
1832 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1833 /* Serialization for the sequence id */
cee54fc9 1834 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1835 if (calldata->arg.seqid == NULL)
1836 goto out_free_calldata;
dc0b027d 1837 calldata->arg.fmode = 0;
a65318bf 1838 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1839 calldata->res.fattr = &calldata->fattr;
c1d51931 1840 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1841 calldata->res.server = server;
5f7dbd5c 1842 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1843 calldata->path.mnt = mntget(path->mnt);
1844 calldata->path.dentry = dget(path->dentry);
9512135d 1845
5138fde0
TM		 1846 msg.rpc_argp = &calldata->arg,
1847 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1848 task_setup_data.callback_data = calldata;
1849 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1850 if (IS_ERR(task))
1851 return PTR_ERR(task);
a49c3c77
TM		 1852 status = 0;
1853 if (wait)
1854 status = rpc_wait_for_completion_task(task);
b39e625b 1855 rpc_put_task(task);
a49c3c77 1856 return status;
9512135d
TM		 1857out_free_calldata:
1858 kfree(calldata);
1859out:
b39e625b
TM		 1860 nfs4_put_open_state(state);
1861 nfs4_put_state_owner(sp);
9512135d 1862 return status;
1da177e4
LT		 1863}
1864
dc0b027d 1865static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1866{
1867 struct file *filp;
1b45c46c 1868 int ret;
02a913a7 1869
1b45c46c 1870 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1871 if (fmode & FMODE_EXEC) {
af22f94a 1872 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1873 state->owner->so_cred,
1874 nd->intent.open.flags);
1875 if (ret < 0)
1876 goto out_close;
1877 }
4a35bd41 1878 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1879 if (!IS_ERR(filp)) {
1880 struct nfs_open_context *ctx;
cd3758e3 1881 ctx = nfs_file_open_context(filp);
02a913a7 1882 ctx->state = state;
95cf959b
TM		 1883 return 0;
1884 }
1b45c46c
TM		 1885 ret = PTR_ERR(filp);
1886out_close:
dc0b027d 1887 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1888 return ret;
02a913a7
TM		 1889}
1890
1891struct dentry *
1da177e4
LT		 1892nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1893{
ad389da7 1894 struct path path = {
4ac91378 1895 .mnt = nd->path.mnt,
ad389da7
TM		 1896 .dentry = dentry,
1897 };
4ac91378 1898 struct dentry *parent;
1da177e4
LT		 1899 struct iattr attr;
1900 struct rpc_cred *cred;
1901 struct nfs4_state *state;
02a913a7 1902 struct dentry *res;
dc0b027d 1903 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1904
1905 if (nd->flags & LOOKUP_CREATE) {
1906 attr.ia_mode = nd->intent.open.create_mode;
1907 attr.ia_valid = ATTR_MODE;
1908 if (!IS_POSIXACL(dir))
ce3b0f8d 1909 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1910 } else {
1911 attr.ia_valid = 0;
1912 BUG_ON(nd->intent.open.flags & O_CREAT);
1913 }
1914
98a8e323 1915 cred = rpc_lookup_cred();
1da177e4 1916 if (IS_ERR(cred))
02a913a7 1917 return (struct dentry *)cred;
565277f6
TM		 1918 parent = dentry->d_parent;
1919 /* Protect against concurrent sillydeletes */
1920 nfs_block_sillyrename(parent);
dc0b027d 1921 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1922 put_rpccred(cred);
02a913a7 1923 if (IS_ERR(state)) {
d75340cc 1924 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1925 d_add(dentry, NULL);
d75340cc
TM		 1926 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1927 }
565277f6 1928 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1929 return (struct dentry *)state;
1930 }
24ac23ab 1931 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1932 if (res != NULL)
deee9369 1933 path.dentry = res;
d75340cc 1934 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1935 nfs_unblock_sillyrename(parent);
dc0b027d 1936 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1937 return res;
1da177e4
LT		 1938}
1939
1940int
02a913a7 1941nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1942{
ad389da7 1943 struct path path = {
4ac91378 1944 .mnt = nd->path.mnt,
ad389da7
TM		 1945 .dentry = dentry,
1946 };
1da177e4
LT		 1947 struct rpc_cred *cred;
1948 struct nfs4_state *state;
dc0b027d 1949 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1950
98a8e323 1951 cred = rpc_lookup_cred();
1da177e4
LT		 1952 if (IS_ERR(cred))
1953 return PTR_ERR(cred);
dc0b027d 1954 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1955 put_rpccred(cred);
02a913a7
TM		 1956 if (IS_ERR(state)) {
1957 switch (PTR_ERR(state)) {
1958 case -EPERM:
1959 case -EACCES:
1960 case -EDQUOT:
1961 case -ENOSPC:
1962 case -EROFS:
1963 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1964 return 1;
b87c0adf
CL		 1965 default:
1966 goto out_drop;
02a913a7 1967 }
02a913a7 1968 }
24ac23ab 1969 if (state->inode == dentry->d_inode) {
d75340cc 1970 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1971 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1972 return 1;
1973 }
dc0b027d 1974 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1975out_drop:
1976 d_drop(dentry);
1da177e4
LT		 1977 return 0;
1978}
1979
7fe5c398
TM		 1980void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1981{
1982 if (ctx->state == NULL)
1983 return;
1984 if (is_sync)
1985 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1986 else
1987 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1988}
1da177e4
LT		 1989
1990static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1991{
43652ad5
BH		 1992 struct nfs4_server_caps_arg args = {
1993 .fhandle = fhandle,
1994 };
1da177e4
LT		 1995 struct nfs4_server_caps_res res = {};
1996 struct rpc_message msg = {
1997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1998 .rpc_argp = &args,
1da177e4
LT		 1999 .rpc_resp = &res,
2000 };
2001 int status;
2002
cccef3b9 2003 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2004 if (status == 0) {
2005 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2006 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2007 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2008 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2009 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2010 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2011 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2012 server->caps |= NFS_CAP_ACLS;
2013 if (res.has_links != 0)
2014 server->caps |= NFS_CAP_HARDLINKS;
2015 if (res.has_symlinks != 0)
2016 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2017 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2018 server->caps |= NFS_CAP_FILEID;
2019 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2020 server->caps |= NFS_CAP_MODE;
2021 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2022 server->caps |= NFS_CAP_NLINK;
2023 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2024 server->caps |= NFS_CAP_OWNER;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2026 server->caps |= NFS_CAP_OWNER_GROUP;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2028 server->caps |= NFS_CAP_ATIME;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2030 server->caps |= NFS_CAP_CTIME;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2032 server->caps |= NFS_CAP_MTIME;
2033
a65318bf
TM		 2034 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2035 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2036 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2037 server->acl_bitmask = res.acl_bitmask;
2038 }
cccef3b9 2039
1da177e4
LT		 2040 return status;
2041}
2042
55a97593 2043int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2044{
2045 struct nfs4_exception exception = { };
2046 int err;
2047 do {
2048 err = nfs4_handle_exception(server,
2049 _nfs4_server_capabilities(server, fhandle),
2050 &exception);
2051 } while (exception.retry);
2052 return err;
2053}
2054
2055static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2056 struct nfs_fsinfo *info)
2057{
1da177e4
LT		 2058 struct nfs4_lookup_root_arg args = {
2059 .bitmask = nfs4_fattr_bitmap,
2060 };
2061 struct nfs4_lookup_res res = {
2062 .server = server,
0e574af1 2063 .fattr = info->fattr,
1da177e4
LT		 2064 .fh = fhandle,
2065 };
2066 struct rpc_message msg = {
2067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2068 .rpc_argp = &args,
2069 .rpc_resp = &res,
2070 };
008f55d0 2071
0e574af1 2072 nfs_fattr_init(info->fattr);
fccba804 2073 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2074}
2075
2076static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2077 struct nfs_fsinfo *info)
2078{
2079 struct nfs4_exception exception = { };
2080 int err;
2081 do {
2082 err = nfs4_handle_exception(server,
2083 _nfs4_lookup_root(server, fhandle, info),
2084 &exception);
2085 } while (exception.retry);
2086 return err;
2087}
2088
54ceac45
DH		 2089/*
2090 * get the file handle for the "/" directory on the server
2091 */
1da177e4 2092static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2093 struct nfs_fsinfo *info)
1da177e4 2094{
1da177e4
LT		 2095 int status;
2096
1da177e4 2097 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2098 if (status == 0)
2099 status = nfs4_server_capabilities(server, fhandle);
2100 if (status == 0)
2101 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2102 return nfs4_map_errors(status);
1da177e4
LT		 2103}
2104
6b97fd3d
MN		 2105/*
2106 * Get locations and (maybe) other attributes of a referral.
2107 * Note that we'll actually follow the referral later when
2108 * we detect fsid mismatch in inode revalidation
2109 */
56659e99 2110static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2111{
2112 int status = -ENOMEM;
2113 struct page *page = NULL;
2114 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2115
2116 page = alloc_page(GFP_KERNEL);
2117 if (page == NULL)
2118 goto out;
2119 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2120 if (locations == NULL)
2121 goto out;
2122
c228fd3a 2123 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2124 if (status != 0)
2125 goto out;
2126 /* Make sure server returned a different fsid for the referral */
2127 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2128 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2129 status = -EIO;
2130 goto out;
2131 }
2132
2133 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2134 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2135 if (!fattr->mode)
2136 fattr->mode = S_IFDIR;
2137 memset(fhandle, 0, sizeof(struct nfs_fh));
2138out:
2139 if (page)
2140 __free_page(page);
2141 if (locations)
2142 kfree(locations);
2143 return status;
2144}
2145
1da177e4
LT		 2146static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2147{
2148 struct nfs4_getattr_arg args = {
2149 .fh = fhandle,
2150 .bitmask = server->attr_bitmask,
2151 };
2152 struct nfs4_getattr_res res = {
2153 .fattr = fattr,
2154 .server = server,
2155 };
2156 struct rpc_message msg = {
2157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2158 .rpc_argp = &args,
2159 .rpc_resp = &res,
2160 };
2161
0e574af1 2162 nfs_fattr_init(fattr);
cccef3b9 2163 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2164}
2165
2166static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2167{
2168 struct nfs4_exception exception = { };
2169 int err;
2170 do {
2171 err = nfs4_handle_exception(server,
2172 _nfs4_proc_getattr(server, fhandle, fattr),
2173 &exception);
2174 } while (exception.retry);
2175 return err;
2176}
2177
2178/*
2179 * The file is not closed if it is opened due to the a request to change
2180 * the size of the file. The open call will not be needed once the
2181 * VFS layer lookup-intents are implemented.
2182 *
2183 * Close is called when the inode is destroyed.
2184 * If we haven't opened the file for O_WRONLY, we
2185 * need to in the size_change case to obtain a stateid.
2186 *
2187 * Got race?
2188 * Because OPEN is always done by name in nfsv4, it is
2189 * possible that we opened a different file by the same
2190 * name. We can recognize this race condition, but we
2191 * can't do anything about it besides returning an error.
2192 *
2193 * This will be fixed with VFS changes (lookup-intent).
2194 */
2195static int
2196nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2197 struct iattr *sattr)
2198{
08e9eac4 2199 struct inode *inode = dentry->d_inode;
659bfcd6 2200 struct rpc_cred *cred = NULL;
d530838b 2201 struct nfs4_state *state = NULL;
1da177e4
LT		 2202 int status;
2203
0e574af1 2204 nfs_fattr_init(fattr);
1da177e4 2205
d530838b 2206 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2207 if (sattr->ia_valid & ATTR_FILE) {
2208 struct nfs_open_context *ctx;
2209
2210 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2211 if (ctx) {
2212 cred = ctx->cred;
2213 state = ctx->state;
2214 }
659bfcd6 2215 }
08e9eac4 2216
659bfcd6 2217 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2218 if (status == 0)
2219 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2220 return status;
2221}
2222
56659e99
TM		 2223static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2224 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2225 struct nfs_fattr *fattr)
2226{
2227 int status;
2228 struct nfs4_lookup_arg args = {
2229 .bitmask = server->attr_bitmask,
2230 .dir_fh = dirfh,
2231 .name = name,
2232 };
2233 struct nfs4_lookup_res res = {
2234 .server = server,
2235 .fattr = fattr,
2236 .fh = fhandle,
2237 };
2238 struct rpc_message msg = {
2239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2240 .rpc_argp = &args,
2241 .rpc_resp = &res,
2242 };
2243
2244 nfs_fattr_init(fattr);
2245
2246 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2247 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2248 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2249 return status;
2250}
2251
2252static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2253 struct qstr *name, struct nfs_fh *fhandle,
2254 struct nfs_fattr *fattr)
2255{
2256 struct nfs4_exception exception = { };
2257 int err;
2258 do {
4e56e082
TM		 2259 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2260 /* FIXME: !!!! */
2261 if (err == -NFS4ERR_MOVED) {
2262 err = -EREMOTE;
2263 break;
2264 }
2265 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2266 } while (exception.retry);
2267 return err;
2268}
2269
56659e99 2270static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2271 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2272{
4e56e082 2273 int status;
1da177e4
LT		 2274
2275 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2276 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2277 if (status == -NFS4ERR_MOVED)
2278 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2279 dprintk("NFS reply lookup: %d\n", status);
2280 return status;
2281}
2282
2283static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2284{
2285 struct nfs4_exception exception = { };
2286 int err;
2287 do {
2288 err = nfs4_handle_exception(NFS_SERVER(dir),
2289 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2290 &exception);
2291 } while (exception.retry);
2292 return err;
2293}
2294
2295static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2296{
76b32999
TM		 2297 struct nfs_server *server = NFS_SERVER(inode);
2298 struct nfs_fattr fattr;
1da177e4
LT		 2299 struct nfs4_accessargs args = {
2300 .fh = NFS_FH(inode),
76b32999
TM		 2301 .bitmask = server->attr_bitmask,
2302 };
2303 struct nfs4_accessres res = {
2304 .server = server,
2305 .fattr = &fattr,
1da177e4 2306 };
1da177e4
LT		 2307 struct rpc_message msg = {
2308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2309 .rpc_argp = &args,
2310 .rpc_resp = &res,
2311 .rpc_cred = entry->cred,
2312 };
2313 int mode = entry->mask;
2314 int status;
2315
2316 /*
2317 * Determine which access bits we want to ask for...
2318 */
2319 if (mode & MAY_READ)
2320 args.access |= NFS4_ACCESS_READ;
2321 if (S_ISDIR(inode->i_mode)) {
2322 if (mode & MAY_WRITE)
2323 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2324 if (mode & MAY_EXEC)
2325 args.access |= NFS4_ACCESS_LOOKUP;
2326 } else {
2327 if (mode & MAY_WRITE)
2328 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2329 if (mode & MAY_EXEC)
2330 args.access |= NFS4_ACCESS_EXECUTE;
2331 }
76b32999 2332 nfs_fattr_init(&fattr);
cccef3b9 2333 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2334 if (!status) {
2335 entry->mask = 0;
2336 if (res.access & NFS4_ACCESS_READ)
2337 entry->mask |= MAY_READ;
2338 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2339 entry->mask |= MAY_WRITE;
2340 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2341 entry->mask |= MAY_EXEC;
76b32999 2342 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2343 }
2344 return status;
2345}
2346
2347static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2348{
2349 struct nfs4_exception exception = { };
2350 int err;
2351 do {
2352 err = nfs4_handle_exception(NFS_SERVER(inode),
2353 _nfs4_proc_access(inode, entry),
2354 &exception);
2355 } while (exception.retry);
2356 return err;
2357}
2358
2359/*
2360 * TODO: For the time being, we don't try to get any attributes
2361 * along with any of the zero-copy operations READ, READDIR,
2362 * READLINK, WRITE.
2363 *
2364 * In the case of the first three, we want to put the GETATTR
2365 * after the read-type operation -- this is because it is hard
2366 * to predict the length of a GETATTR response in v4, and thus
2367 * align the READ data correctly. This means that the GETATTR
2368 * may end up partially falling into the page cache, and we should
2369 * shift it into the 'tail' of the xdr_buf before processing.
2370 * To do this efficiently, we need to know the total length
2371 * of data received, which doesn't seem to be available outside
2372 * of the RPC layer.
2373 *
2374 * In the case of WRITE, we also want to put the GETATTR after
2375 * the operation -- in this case because we want to make sure
2376 * we get the post-operation mtime and size. This means that
2377 * we can't use xdr_encode_pages() as written: we need a variant
2378 * of it which would leave room in the 'tail' iovec.
2379 *
2380 * Both of these changes to the XDR layer would in fact be quite
2381 * minor, but I decided to leave them for a subsequent patch.
2382 */
2383static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2384 unsigned int pgbase, unsigned int pglen)
2385{
2386 struct nfs4_readlink args = {
2387 .fh = NFS_FH(inode),
2388 .pgbase = pgbase,
2389 .pglen = pglen,
2390 .pages = &page,
2391 };
f50c7000 2392 struct nfs4_readlink_res res;
1da177e4
LT		 2393 struct rpc_message msg = {
2394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2395 .rpc_argp = &args,
f50c7000 2396 .rpc_resp = &res,
1da177e4
LT		 2397 };
2398
cccef3b9 2399 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2400}
2401
2402static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2403 unsigned int pgbase, unsigned int pglen)
2404{
2405 struct nfs4_exception exception = { };
2406 int err;
2407 do {
2408 err = nfs4_handle_exception(NFS_SERVER(inode),
2409 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2410 &exception);
2411 } while (exception.retry);
2412 return err;
2413}
2414
1da177e4
LT		 2415/*
2416 * Got race?
2417 * We will need to arrange for the VFS layer to provide an atomic open.
2418 * Until then, this create/open method is prone to inefficiency and race
2419 * conditions due to the lookup, create, and open VFS calls from sys_open()
2420 * placed on the wire.
2421 *
2422 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2423 * The file will be opened again in the subsequent VFS open call
2424 * (nfs4_proc_file_open).
2425 *
2426 * The open for read will just hang around to be used by any process that
2427 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2428 */
2429
2430static int
2431nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2432 int flags, struct nameidata *nd)
1da177e4 2433{
ad389da7 2434 struct path path = {
4ac91378 2435 .mnt = nd->path.mnt,
ad389da7
TM		 2436 .dentry = dentry,
2437 };
1da177e4
LT		 2438 struct nfs4_state *state;
2439 struct rpc_cred *cred;
dc0b027d 2440 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2441 int status = 0;
2442
98a8e323 2443 cred = rpc_lookup_cred();
1da177e4
LT		 2444 if (IS_ERR(cred)) {
2445 status = PTR_ERR(cred);
2446 goto out;
2447 }
dc0b027d 2448 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2449 d_drop(dentry);
1da177e4
LT		 2450 if (IS_ERR(state)) {
2451 status = PTR_ERR(state);
659bfcd6 2452 goto out_putcred;
1da177e4 2453 }
d4d9cdcb 2454 d_add(dentry, igrab(state->inode));
d75340cc 2455 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2456 if (flags & O_EXCL) {
2457 struct nfs_fattr fattr;
659bfcd6 2458 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2459 if (status == 0)
65e4308d 2460 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2461 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2462 }
ad389da7 2463 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2464 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2465 else
dc0b027d 2466 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2467out_putcred:
2468 put_rpccred(cred);
1da177e4
LT		 2469out:
2470 return status;
2471}
2472
2473static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2474{
16e42959 2475 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2476 struct nfs_removeargs args = {
1da177e4 2477 .fh = NFS_FH(dir),
4fdc17b2
TM		 2478 .name.len = name->len,
2479 .name.name = name->name,
16e42959
TM		 2480 .bitmask = server->attr_bitmask,
2481 };
4fdc17b2 2482 struct nfs_removeres res = {
16e42959 2483 .server = server,
1da177e4 2484 };
1da177e4 2485 struct rpc_message msg = {
4fdc17b2
TM		 2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2487 .rpc_argp = &args,
2488 .rpc_resp = &res,
1da177e4
LT		 2489 };
2490 int status;
2491
4fdc17b2 2492 nfs_fattr_init(&res.dir_attr);
cccef3b9 2493 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2494 if (status == 0) {
2495 update_changeattr(dir, &res.cinfo);
4fdc17b2 2496 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2497 }
1da177e4
LT		 2498 return status;
2499}
2500
2501static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2502{
2503 struct nfs4_exception exception = { };
2504 int err;
2505 do {
2506 err = nfs4_handle_exception(NFS_SERVER(dir),
2507 _nfs4_proc_remove(dir, name),
2508 &exception);
2509 } while (exception.retry);
2510 return err;
2511}
2512
e4eff1a6 2513static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2514{
e4eff1a6
TM		 2515 struct nfs_server *server = NFS_SERVER(dir);
2516 struct nfs_removeargs *args = msg->rpc_argp;
2517 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2518
a65318bf 2519 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2520 res->server = server;
1da177e4 2521 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2522}
2523
e4eff1a6 2524static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2525{
e4eff1a6
TM		 2526 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2527
472cfbd9 2528 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2529 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2530 return 0;
472cfbd9 2531 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2532 update_changeattr(dir, &res->cinfo);
2533 nfs_post_op_update_inode(dir, &res->dir_attr);
2534 return 1;
1da177e4
LT		 2535}
2536
2537static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2538 struct inode *new_dir, struct qstr *new_name)
2539{
6caf2c82 2540 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2541 struct nfs4_rename_arg arg = {
2542 .old_dir = NFS_FH(old_dir),
2543 .new_dir = NFS_FH(new_dir),
2544 .old_name = old_name,
2545 .new_name = new_name,
6caf2c82
TM		 2546 .bitmask = server->attr_bitmask,
2547 };
2548 struct nfs_fattr old_fattr, new_fattr;
2549 struct nfs4_rename_res res = {
2550 .server = server,
2551 .old_fattr = &old_fattr,
2552 .new_fattr = &new_fattr,
1da177e4 2553 };
1da177e4
LT		 2554 struct rpc_message msg = {
2555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2556 .rpc_argp = &arg,
2557 .rpc_resp = &res,
2558 };
2559 int status;
2560
6caf2c82
TM		 2561 nfs_fattr_init(res.old_fattr);
2562 nfs_fattr_init(res.new_fattr);
cccef3b9 2563 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2564
2565 if (!status) {
2566 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2567 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2568 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2569 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2570 }
2571 return status;
2572}
2573
2574static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2575 struct inode *new_dir, struct qstr *new_name)
2576{
2577 struct nfs4_exception exception = { };
2578 int err;
2579 do {
2580 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2581 _nfs4_proc_rename(old_dir, old_name,
2582 new_dir, new_name),
2583 &exception);
2584 } while (exception.retry);
2585 return err;
2586}
2587
2588static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2589{
91ba2eee 2590 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2591 struct nfs4_link_arg arg = {
2592 .fh = NFS_FH(inode),
2593 .dir_fh = NFS_FH(dir),
2594 .name = name,
91ba2eee
TM		 2595 .bitmask = server->attr_bitmask,
2596 };
2597 struct nfs_fattr fattr, dir_attr;
2598 struct nfs4_link_res res = {
2599 .server = server,
2600 .fattr = &fattr,
2601 .dir_attr = &dir_attr,
1da177e4 2602 };
1da177e4
LT		 2603 struct rpc_message msg = {
2604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2605 .rpc_argp = &arg,
91ba2eee 2606 .rpc_resp = &res,
1da177e4
LT		 2607 };
2608 int status;
2609
91ba2eee
TM		 2610 nfs_fattr_init(res.fattr);
2611 nfs_fattr_init(res.dir_attr);
cccef3b9 2612 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2613 if (!status) {
2614 update_changeattr(dir, &res.cinfo);
2615 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2616 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2617 }
1da177e4
LT		 2618
2619 return status;
2620}
2621
2622static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2623{
2624 struct nfs4_exception exception = { };
2625 int err;
2626 do {
2627 err = nfs4_handle_exception(NFS_SERVER(inode),
2628 _nfs4_proc_link(inode, dir, name),
2629 &exception);
2630 } while (exception.retry);
2631 return err;
2632}
2633
57dc9a57
TM		 2634struct nfs4_createdata {
2635 struct rpc_message msg;
2636 struct nfs4_create_arg arg;
2637 struct nfs4_create_res res;
2638 struct nfs_fh fh;
2639 struct nfs_fattr fattr;
2640 struct nfs_fattr dir_fattr;
2641};
2642
2643static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2644 struct qstr *name, struct iattr *sattr, u32 ftype)
2645{
2646 struct nfs4_createdata *data;
2647
2648 data = kzalloc(sizeof(*data), GFP_KERNEL);
2649 if (data != NULL) {
2650 struct nfs_server *server = NFS_SERVER(dir);
2651
2652 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2653 data->msg.rpc_argp = &data->arg;
2654 data->msg.rpc_resp = &data->res;
2655 data->arg.dir_fh = NFS_FH(dir);
2656 data->arg.server = server;
2657 data->arg.name = name;
2658 data->arg.attrs = sattr;
2659 data->arg.ftype = ftype;
2660 data->arg.bitmask = server->attr_bitmask;
2661 data->res.server = server;
2662 data->res.fh = &data->fh;
2663 data->res.fattr = &data->fattr;
2664 data->res.dir_fattr = &data->dir_fattr;
2665 nfs_fattr_init(data->res.fattr);
2666 nfs_fattr_init(data->res.dir_fattr);
2667 }
2668 return data;
2669}
2670
2671static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2672{
cccef3b9
AA		 2673 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2674 &data->arg, &data->res, 1);
57dc9a57
TM		 2675 if (status == 0) {
2676 update_changeattr(dir, &data->res.dir_cinfo);
2677 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2678 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2679 }
2680 return status;
2681}
2682
2683static void nfs4_free_createdata(struct nfs4_createdata *data)
2684{
2685 kfree(data);
2686}
2687
4f390c15 2688static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2689 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2690{
57dc9a57
TM		 2691 struct nfs4_createdata *data;
2692 int status = -ENAMETOOLONG;
1da177e4 2693
94a6d753 2694 if (len > NFS4_MAXPATHLEN)
57dc9a57 2695 goto out;
4f390c15 2696
57dc9a57
TM		 2697 status = -ENOMEM;
2698 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2699 if (data == NULL)
2700 goto out;
2701
2702 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2703 data->arg.u.symlink.pages = &page;
2704 data->arg.u.symlink.len = len;
1da177e4 2705
57dc9a57
TM		 2706 status = nfs4_do_create(dir, dentry, data);
2707
2708 nfs4_free_createdata(data);
2709out:
1da177e4
LT		 2710 return status;
2711}
2712
4f390c15 2713static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2714 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2715{
2716 struct nfs4_exception exception = { };
2717 int err;
2718 do {
2719 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2720 _nfs4_proc_symlink(dir, dentry, page,
2721 len, sattr),
1da177e4
LT		 2722 &exception);
2723 } while (exception.retry);
2724 return err;
2725}
2726
2727static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2728 struct iattr *sattr)
2729{
57dc9a57
TM		 2730 struct nfs4_createdata *data;
2731 int status = -ENOMEM;
1da177e4 2732
57dc9a57
TM		 2733 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2734 if (data == NULL)
2735 goto out;
2736
2737 status = nfs4_do_create(dir, dentry, data);
2738
2739 nfs4_free_createdata(data);
2740out:
1da177e4
LT		 2741 return status;
2742}
2743
2744static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2745 struct iattr *sattr)
2746{
2747 struct nfs4_exception exception = { };
2748 int err;
2749 do {
2750 err = nfs4_handle_exception(NFS_SERVER(dir),
2751 _nfs4_proc_mkdir(dir, dentry, sattr),
2752 &exception);
2753 } while (exception.retry);
2754 return err;
2755}
2756
2757static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2758 u64 cookie, struct page *page, unsigned int count, int plus)
2759{
2760 struct inode *dir = dentry->d_inode;
2761 struct nfs4_readdir_arg args = {
2762 .fh = NFS_FH(dir),
2763 .pages = &page,
2764 .pgbase = 0,
2765 .count = count,
a65318bf 2766 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2767 };
2768 struct nfs4_readdir_res res;
2769 struct rpc_message msg = {
2770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2771 .rpc_argp = &args,
2772 .rpc_resp = &res,
2773 .rpc_cred = cred,
2774 };
2775 int status;
2776
3110ff80 2777 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2778 dentry->d_parent->d_name.name,
2779 dentry->d_name.name,
2780 (unsigned long long)cookie);
1da177e4
LT		 2781 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2782 res.pgbase = args.pgbase;
cccef3b9 2783 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2784 if (status == 0)
2785 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2786
2787 nfs_invalidate_atime(dir);
2788
3110ff80 2789 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2790 return status;
2791}
2792
2793static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2794 u64 cookie, struct page *page, unsigned int count, int plus)
2795{
2796 struct nfs4_exception exception = { };
2797 int err;
2798 do {
2799 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2800 _nfs4_proc_readdir(dentry, cred, cookie,
2801 page, count, plus),
2802 &exception);
2803 } while (exception.retry);
2804 return err;
2805}
2806
2807static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2808 struct iattr *sattr, dev_t rdev)
2809{
57dc9a57
TM		 2810 struct nfs4_createdata *data;
2811 int mode = sattr->ia_mode;
2812 int status = -ENOMEM;
1da177e4
LT		 2813
2814 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2815 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2816
2817 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2818 if (data == NULL)
2819 goto out;
2820
1da177e4 2821 if (S_ISFIFO(mode))
57dc9a57 2822 data->arg.ftype = NF4FIFO;
1da177e4 2823 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2824 data->arg.ftype = NF4BLK;
2825 data->arg.u.device.specdata1 = MAJOR(rdev);
2826 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2827 }
2828 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2829 data->arg.ftype = NF4CHR;
2830 data->arg.u.device.specdata1 = MAJOR(rdev);
2831 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2832 }
1da177e4 2833
57dc9a57
TM		 2834 status = nfs4_do_create(dir, dentry, data);
2835
2836 nfs4_free_createdata(data);
2837out:
1da177e4
LT		 2838 return status;
2839}
2840
2841static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2842 struct iattr *sattr, dev_t rdev)
2843{
2844 struct nfs4_exception exception = { };
2845 int err;
2846 do {
2847 err = nfs4_handle_exception(NFS_SERVER(dir),
2848 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2849 &exception);
2850 } while (exception.retry);
2851 return err;
2852}
2853
2854static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2855 struct nfs_fsstat *fsstat)
2856{
2857 struct nfs4_statfs_arg args = {
2858 .fh = fhandle,
2859 .bitmask = server->attr_bitmask,
2860 };
24ad148a
BH		 2861 struct nfs4_statfs_res res = {
2862 .fsstat = fsstat,
2863 };
1da177e4
LT		 2864 struct rpc_message msg = {
2865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2866 .rpc_argp = &args,
24ad148a 2867 .rpc_resp = &res,
1da177e4
LT		 2868 };
2869
0e574af1 2870 nfs_fattr_init(fsstat->fattr);
cccef3b9 2871 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2872}
2873
2874static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2875{
2876 struct nfs4_exception exception = { };
2877 int err;
2878 do {
2879 err = nfs4_handle_exception(server,
2880 _nfs4_proc_statfs(server, fhandle, fsstat),
2881 &exception);
2882 } while (exception.retry);
2883 return err;
2884}
2885
2886static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2887 struct nfs_fsinfo *fsinfo)
2888{
2889 struct nfs4_fsinfo_arg args = {
2890 .fh = fhandle,
2891 .bitmask = server->attr_bitmask,
2892 };
3dda5e43
BH		 2893 struct nfs4_fsinfo_res res = {
2894 .fsinfo = fsinfo,
2895 };
1da177e4
LT		 2896 struct rpc_message msg = {
2897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2898 .rpc_argp = &args,
3dda5e43 2899 .rpc_resp = &res,
1da177e4
LT		 2900 };
2901
cccef3b9 2902 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2903}
2904
2905static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2906{
2907 struct nfs4_exception exception = { };
2908 int err;
2909
2910 do {
2911 err = nfs4_handle_exception(server,
2912 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2913 &exception);
2914 } while (exception.retry);
2915 return err;
2916}
2917
2918static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2919{
0e574af1 2920 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2921 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2922}
2923
2924static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2925 struct nfs_pathconf *pathconf)
2926{
2927 struct nfs4_pathconf_arg args = {
2928 .fh = fhandle,
2929 .bitmask = server->attr_bitmask,
2930 };
d45b2989
BH		 2931 struct nfs4_pathconf_res res = {
2932 .pathconf = pathconf,
2933 };
1da177e4
LT		 2934 struct rpc_message msg = {
2935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2936 .rpc_argp = &args,
d45b2989 2937 .rpc_resp = &res,
1da177e4
LT		 2938 };
2939
2940 /* None of the pathconf attributes are mandatory to implement */
2941 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2942 memset(pathconf, 0, sizeof(*pathconf));
2943 return 0;
2944 }
2945
0e574af1 2946 nfs_fattr_init(pathconf->fattr);
cccef3b9 2947 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2948}
2949
2950static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2951 struct nfs_pathconf *pathconf)
2952{
2953 struct nfs4_exception exception = { };
2954 int err;
2955
2956 do {
2957 err = nfs4_handle_exception(server,
2958 _nfs4_proc_pathconf(server, fhandle, pathconf),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
ec06c096 2964static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2965{
ec06c096 2966 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2967
f11c88af
AA		 2968 dprintk("--> %s\n", __func__);
2969
2970 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2971 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2972
9e33bed5 2973 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2974 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2975 return -EAGAIN;
1da177e4 2976 }
8850df99
TM		 2977
2978 nfs_invalidate_atime(data->inode);
1da177e4 2979 if (task->tk_status > 0)
ec06c096
TM		 2980 renew_lease(server, data->timestamp);
2981 return 0;
1da177e4
LT		 2982}
2983
bdc7f021 2984static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2985{
1da177e4 2986 data->timestamp = jiffies;
bdc7f021 2987 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2988}
2989
788e7a89 2990static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2991{
1da177e4
LT		 2992 struct inode *inode = data->inode;
2993
def6ed7e
AA		 2994 /* slot is freed in nfs_writeback_done */
2995 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2996 task->tk_status);
2997
9e33bed5 2998 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2999 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3000 return -EAGAIN;
1da177e4 3001 }
4f9838c7 3002 if (task->tk_status >= 0) {
1da177e4 3003 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 3004 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 3005 }
788e7a89 3006 return 0;
1da177e4
LT		 3007}
3008
bdc7f021 3009static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3010{
bdc7f021
TM		 3011 struct nfs_server *server = NFS_SERVER(data->inode);
3012
a65318bf 3013 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3014 data->res.server = server;
1da177e4
LT		 3015 data->timestamp = jiffies;
3016
bdc7f021 3017 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 3018}
3019
788e7a89 3020static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3021{
1da177e4
LT		 3022 struct inode *inode = data->inode;
3023
21d9a851
AA		 3024 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3025 task->tk_status);
9e33bed5 3026 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3027 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3028 return -EAGAIN;
1da177e4 3029 }
21d9a851
AA		 3030 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3031 &data->res.seq_res);
9e08a3c5 3032 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3033 return 0;
1da177e4
LT		 3034}
3035
bdc7f021 3036static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3037{
788e7a89 3038 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3039
a65318bf 3040 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3041 data->res.server = server;
bdc7f021 3042 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3043}
3044
3045/*
3046 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3047 * standalone procedure for queueing an asynchronous RENEW.
3048 */
963d8fe5 3049static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3050{
adfa6f98 3051 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3052 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3053
3054 if (task->tk_status < 0) {
95baa25c
TM		 3055 /* Unless we're shutting down, schedule state recovery! */
3056 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3057 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3058 return;
3059 }
3060 spin_lock(&clp->cl_lock);
3061 if (time_before(clp->cl_last_renewal,timestamp))
3062 clp->cl_last_renewal = timestamp;
3063 spin_unlock(&clp->cl_lock);
29fba38b
BH		 3064 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3065 task->tk_msg.rpc_cred);
3066 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT		 3067}
3068
963d8fe5
TM		 3069static const struct rpc_call_ops nfs4_renew_ops = {
3070 .rpc_call_done = nfs4_renew_done,
3071};
3072
adfa6f98 3073int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3074{
3075 struct rpc_message msg = {
3076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3077 .rpc_argp = clp,
b4454fe1 3078 .rpc_cred = cred,
1da177e4
LT		 3079 };
3080
3081 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3082 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3083}
3084
adfa6f98 3085int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3086{
3087 struct rpc_message msg = {
3088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3089 .rpc_argp = clp,
b4454fe1 3090 .rpc_cred = cred,
1da177e4
LT		 3091 };
3092 unsigned long now = jiffies;
3093 int status;
3094
3095 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3096 if (status < 0)
3097 return status;
3098 spin_lock(&clp->cl_lock);
3099 if (time_before(clp->cl_last_renewal,now))
3100 clp->cl_last_renewal = now;
3101 spin_unlock(&clp->cl_lock);
3102 return 0;
3103}
3104
aa1870af
BF		 3105static inline int nfs4_server_supports_acls(struct nfs_server *server)
3106{
3107 return (server->caps & NFS_CAP_ACLS)
3108 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3109 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3110}
3111
3112/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3113 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3114 * the stack.
3115 */
3116#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3117
3118static void buf_to_pages(const void *buf, size_t buflen,
3119 struct page **pages, unsigned int *pgbase)
3120{
3121 const void *p = buf;
3122
3123 *pgbase = offset_in_page(buf);
3124 p -= *pgbase;
3125 while (p < buf + buflen) {
3126 *(pages++) = virt_to_page(p);
3127 p += PAGE_CACHE_SIZE;
3128 }
3129}
3130
e50a1c2e
BF		 3131struct nfs4_cached_acl {
3132 int cached;
3133 size_t len;
3e9d4154 3134 char data[0];
e50a1c2e
BF		 3135};
3136
3137static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3138{
3139 struct nfs_inode *nfsi = NFS_I(inode);
3140
3141 spin_lock(&inode->i_lock);
3142 kfree(nfsi->nfs4_acl);
3143 nfsi->nfs4_acl = acl;
3144 spin_unlock(&inode->i_lock);
3145}
3146
3147static void nfs4_zap_acl_attr(struct inode *inode)
3148{
3149 nfs4_set_cached_acl(inode, NULL);
3150}
3151
3152static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3153{
3154 struct nfs_inode *nfsi = NFS_I(inode);
3155 struct nfs4_cached_acl *acl;
3156 int ret = -ENOENT;
3157
3158 spin_lock(&inode->i_lock);
3159 acl = nfsi->nfs4_acl;
3160 if (acl == NULL)
3161 goto out;
3162 if (buf == NULL) /* user is just asking for length */
3163 goto out_len;
3164 if (acl->cached == 0)
3165 goto out;
3166 ret = -ERANGE; /* see getxattr(2) man page */
3167 if (acl->len > buflen)
3168 goto out;
3169 memcpy(buf, acl->data, acl->len);
3170out_len:
3171 ret = acl->len;
3172out:
3173 spin_unlock(&inode->i_lock);
3174 return ret;
3175}
3176
3177static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3178{
3179 struct nfs4_cached_acl *acl;
3180
3181 if (buf && acl_len <= PAGE_SIZE) {
3182 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3183 if (acl == NULL)
3184 goto out;
3185 acl->cached = 1;
3186 memcpy(acl->data, buf, acl_len);
3187 } else {
3188 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3189 if (acl == NULL)
3190 goto out;
3191 acl->cached = 0;
3192 }
3193 acl->len = acl_len;
3194out:
3195 nfs4_set_cached_acl(inode, acl);
3196}
3197
16b4289c 3198static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3199{
aa1870af
BF		 3200 struct page *pages[NFS4ACL_MAXPAGES];
3201 struct nfs_getaclargs args = {
3202 .fh = NFS_FH(inode),
3203 .acl_pages = pages,
3204 .acl_len = buflen,
3205 };
663c79b3
BH		 3206 struct nfs_getaclres res = {
3207 .acl_len = buflen,
3208 };
e50a1c2e 3209 void *resp_buf;
aa1870af
BF		 3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3212 .rpc_argp = &args,
663c79b3 3213 .rpc_resp = &res,
aa1870af 3214 };
e50a1c2e 3215 struct page *localpage = NULL;
aa1870af
BF		 3216 int ret;
3217
e50a1c2e
BF		 3218 if (buflen < PAGE_SIZE) {
3219 /* As long as we're doing a round trip to the server anyway,
3220 * let's be prepared for a page of acl data. */
3221 localpage = alloc_page(GFP_KERNEL);
3222 resp_buf = page_address(localpage);
3223 if (localpage == NULL)
3224 return -ENOMEM;
3225 args.acl_pages[0] = localpage;
3226 args.acl_pgbase = 0;
663c79b3 3227 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3228 } else {
3229 resp_buf = buf;
3230 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3231 }
cccef3b9 3232 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3233 if (ret)
3234 goto out_free;
663c79b3
BH		 3235 if (res.acl_len > args.acl_len)
3236 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3237 else
663c79b3 3238 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3239 if (buf) {
3240 ret = -ERANGE;
663c79b3 3241 if (res.acl_len > buflen)
e50a1c2e
BF		 3242 goto out_free;
3243 if (localpage)
663c79b3 3244 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3245 }
663c79b3 3246 ret = res.acl_len;
e50a1c2e
BF		 3247out_free:
3248 if (localpage)
3249 __free_page(localpage);
aa1870af
BF		 3250 return ret;
3251}
3252
16b4289c
TM		 3253static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3254{
3255 struct nfs4_exception exception = { };
3256 ssize_t ret;
3257 do {
3258 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3259 if (ret >= 0)
3260 break;
3261 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3262 } while (exception.retry);
3263 return ret;
3264}
3265
e50a1c2e
BF		 3266static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3267{
3268 struct nfs_server *server = NFS_SERVER(inode);
3269 int ret;
3270
3271 if (!nfs4_server_supports_acls(server))
3272 return -EOPNOTSUPP;
3273 ret = nfs_revalidate_inode(server, inode);
3274 if (ret < 0)
3275 return ret;
3276 ret = nfs4_read_cached_acl(inode, buf, buflen);
3277 if (ret != -ENOENT)
3278 return ret;
3279 return nfs4_get_acl_uncached(inode, buf, buflen);
3280}
3281
16b4289c 3282static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3283{
3284 struct nfs_server *server = NFS_SERVER(inode);
3285 struct page *pages[NFS4ACL_MAXPAGES];
3286 struct nfs_setaclargs arg = {
3287 .fh = NFS_FH(inode),
3288 .acl_pages = pages,
3289 .acl_len = buflen,
3290 };
73c403a9 3291 struct nfs_setaclres res;
4b580ee3
BF		 3292 struct rpc_message msg = {
3293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3294 .rpc_argp = &arg,
73c403a9 3295 .rpc_resp = &res,
4b580ee3
BF		 3296 };
3297 int ret;
3298
3299 if (!nfs4_server_supports_acls(server))
3300 return -EOPNOTSUPP;
642ac549 3301 nfs_inode_return_delegation(inode);
4b580ee3 3302 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3303 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3304 nfs_access_zap_cache(inode);
3305 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3306 return ret;
3307}
3308
16b4289c
TM		 3309static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3310{
3311 struct nfs4_exception exception = { };
3312 int err;
3313 do {
3314 err = nfs4_handle_exception(NFS_SERVER(inode),
3315 __nfs4_proc_set_acl(inode, buf, buflen),
3316 &exception);
3317 } while (exception.retry);
3318 return err;
3319}
3320
1da177e4 3321static int
8328d59f 3322_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3323{
1da177e4
LT		 3324 if (!clp || task->tk_status >= 0)
3325 return 0;
3326 switch(task->tk_status) {
9e33bed5
TM		 3327 case -NFS4ERR_ADMIN_REVOKED:
3328 case -NFS4ERR_BAD_STATEID:
3329 case -NFS4ERR_OPENMODE:
3330 if (state == NULL)
3331 break;
3332 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3333 case -NFS4ERR_STALE_CLIENTID:
3334 case -NFS4ERR_STALE_STATEID:
3335 case -NFS4ERR_EXPIRED:
5d00837b 3336 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3337 nfs4_schedule_state_recovery(clp);
e005e804 3338 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3339 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3340 task->tk_status = 0;
3341 return -EAGAIN;
4745e315
AA		 3342#if defined(CONFIG_NFS_V4_1)
3343 case -NFS4ERR_BADSESSION:
3344 case -NFS4ERR_BADSLOT:
3345 case -NFS4ERR_BAD_HIGH_SLOT:
3346 case -NFS4ERR_DEADSESSION:
3347 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3348 case -NFS4ERR_SEQ_FALSE_RETRY:
3349 case -NFS4ERR_SEQ_MISORDERED:
3350 dprintk("%s ERROR %d, Reset session\n", __func__,
3351 task->tk_status);
3352 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3353 task->tk_status = 0;
3354 return -EAGAIN;
3355#endif /* CONFIG_NFS_V4_1 */
1da177e4 3356 case -NFS4ERR_DELAY:
8328d59f
AA		 3357 if (server)
3358 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3359 case -NFS4ERR_GRACE:
1da177e4
LT		 3360 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3361 task->tk_status = 0;
3362 return -EAGAIN;
3363 case -NFS4ERR_OLD_STATEID:
3364 task->tk_status = 0;
3365 return -EAGAIN;
3366 }
3367 task->tk_status = nfs4_map_errors(task->tk_status);
3368 return 0;
3369}
3370
8328d59f
AA		 3371static int
3372nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3373{
3374 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3375}
3376
adfa6f98 3377int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3378{
3379 nfs4_verifier sc_verifier;
3380 struct nfs4_setclientid setclientid = {
3381 .sc_verifier = &sc_verifier,
3382 .sc_prog = program,
3383 };
3384 struct rpc_message msg = {
3385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3386 .rpc_argp = &setclientid,
3387 .rpc_resp = clp,
286d7d6a 3388 .rpc_cred = cred,
1da177e4 3389 };
bc4785cd 3390 __be32 *p;
1da177e4
LT		 3391 int loop = 0;
3392 int status;
3393
bc4785cd 3394 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3395 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3396 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3397
3398 for(;;) {
3399 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3400 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3401 clp->cl_ipaddr,
3402 rpc_peeraddr2str(clp->cl_rpcclient,
3403 RPC_DISPLAY_ADDR),
69dd716c
TM		 3404 rpc_peeraddr2str(clp->cl_rpcclient,
3405 RPC_DISPLAY_PROTO),
78ea323b 3406 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3407 clp->cl_id_uniquifier);
3408 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3409 sizeof(setclientid.sc_netid),
3410 rpc_peeraddr2str(clp->cl_rpcclient,
3411 RPC_DISPLAY_NETID));
1da177e4 3412 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3413 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3414 clp->cl_ipaddr, port >> 8, port & 255);
3415
3416 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3417 if (status != -NFS4ERR_CLID_INUSE)
3418 break;
3419 if (signalled())
3420 break;
3421 if (loop++ & 1)
3422 ssleep(clp->cl_lease_time + 1);
3423 else
3424 if (++clp->cl_id_uniquifier == 0)
3425 break;
3426 }
3427 return status;
3428}
3429
adfa6f98 3430static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3431{
3432 struct nfs_fsinfo fsinfo;
3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3435 .rpc_argp = clp,
3436 .rpc_resp = &fsinfo,
286d7d6a 3437 .rpc_cred = cred,
1da177e4
LT		 3438 };
3439 unsigned long now;
3440 int status;
3441
3442 now = jiffies;
3443 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3444 if (status == 0) {
3445 spin_lock(&clp->cl_lock);
3446 clp->cl_lease_time = fsinfo.lease_time * HZ;
3447 clp->cl_last_renewal = now;
3448 spin_unlock(&clp->cl_lock);
3449 }
3450 return status;
3451}
3452
adfa6f98 3453int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3454{
77e03677 3455 long timeout = 0;
51581f3b
TM		 3456 int err;
3457 do {
3458 err = _nfs4_proc_setclientid_confirm(clp, cred);
3459 switch (err) {
3460 case 0:
3461 return err;
3462 case -NFS4ERR_RESOURCE:
3463 /* The IBM lawyers misread another document! */
3464 case -NFS4ERR_DELAY:
3465 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3466 }
3467 } while (err == 0);
3468 return err;
3469}
3470
fe650407
TM		 3471struct nfs4_delegreturndata {
3472 struct nfs4_delegreturnargs args;
fa178f29 3473 struct nfs4_delegreturnres res;
fe650407
TM		 3474 struct nfs_fh fh;
3475 nfs4_stateid stateid;
26e976a8 3476 unsigned long timestamp;
fa178f29 3477 struct nfs_fattr fattr;
fe650407
TM		 3478 int rpc_status;
3479};
3480
fe650407
TM		 3481static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3482{
3483 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3484
3485 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3486 task->tk_status);
3487
fe650407 3488 data->rpc_status = task->tk_status;
26e976a8 3489 if (data->rpc_status == 0)
fa178f29 3490 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3491}
3492
3493static void nfs4_delegreturn_release(void *calldata)
3494{
fe650407
TM		 3495 kfree(calldata);
3496}
3497
938e1010
AA		 3498#if defined(CONFIG_NFS_V4_1)
3499static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3500{
3501 struct nfs4_delegreturndata *d_data;
3502
3503 d_data = (struct nfs4_delegreturndata *)data;
3504
3505 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3506 &d_data->args.seq_args,
3507 &d_data->res.seq_res, 1, task))
3508 return;
3509 rpc_call_start(task);
3510}
3511#endif /* CONFIG_NFS_V4_1 */
3512
c8d149f3 3513static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3514#if defined(CONFIG_NFS_V4_1)
3515 .rpc_call_prepare = nfs4_delegreturn_prepare,
3516#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3517 .rpc_call_done = nfs4_delegreturn_done,
3518 .rpc_release = nfs4_delegreturn_release,
3519};
3520
e6f81075 3521static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3522{
3523 struct nfs4_delegreturndata *data;
fa178f29 3524 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3525 struct rpc_task *task;
5138fde0
TM		 3526 struct rpc_message msg = {
3527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3528 .rpc_cred = cred,
3529 };
c970aa85
TM		 3530 struct rpc_task_setup task_setup_data = {
3531 .rpc_client = server->client,
5138fde0 3532 .rpc_message = &msg,
c970aa85
TM		 3533 .callback_ops = &nfs4_delegreturn_ops,
3534 .flags = RPC_TASK_ASYNC,
3535 };
e6f81075 3536 int status = 0;
fe650407 3537
938e1010 3538 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3539 if (data == NULL)
3540 return -ENOMEM;
3541 data->args.fhandle = &data->fh;
3542 data->args.stateid = &data->stateid;
fa178f29 3543 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3544 nfs_copy_fh(&data->fh, NFS_FH(inode));
3545 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3546 data->res.fattr = &data->fattr;
3547 data->res.server = server;
5f7dbd5c 3548 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3549 nfs_fattr_init(data->res.fattr);
26e976a8 3550 data->timestamp = jiffies;
fe650407
TM		 3551 data->rpc_status = 0;
3552
c970aa85 3553 task_setup_data.callback_data = data;
5138fde0
TM		 3554 msg.rpc_argp = &data->args,
3555 msg.rpc_resp = &data->res,
c970aa85 3556 task = rpc_run_task(&task_setup_data);
7a1218a2 3557 if (IS_ERR(task))
fe650407 3558 return PTR_ERR(task);
e6f81075
TM		 3559 if (!issync)
3560 goto out;
fe650407 3561 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3562 if (status != 0)
3563 goto out;
3564 status = data->rpc_status;
3565 if (status != 0)
3566 goto out;
3567 nfs_refresh_inode(inode, &data->fattr);
3568out:
e6b3c4db 3569 rpc_put_task(task);
fe650407 3570 return status;
1da177e4
LT		 3571}
3572
e6f81075 3573int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3574{
3575 struct nfs_server *server = NFS_SERVER(inode);
3576 struct nfs4_exception exception = { };
3577 int err;
3578 do {
e6f81075 3579 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3580 switch (err) {
3581 case -NFS4ERR_STALE_STATEID:
3582 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3583 case 0:
3584 return 0;
3585 }
3586 err = nfs4_handle_exception(server, err, &exception);
3587 } while (exception.retry);
3588 return err;
3589}
3590
3591#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3592#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3593
3594/*
3595 * sleep, with exponential backoff, and retry the LOCK operation.
3596 */
3597static unsigned long
3598nfs4_set_lock_task_retry(unsigned long timeout)
3599{
150030b7 3600 schedule_timeout_killable(timeout);
1da177e4
LT		 3601 timeout <<= 1;
3602 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3603 return NFS4_LOCK_MAXTIMEOUT;
3604 return timeout;
3605}
3606
1da177e4
LT		 3607static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3608{
3609 struct inode *inode = state->inode;
3610 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3611 struct nfs_client *clp = server->nfs_client;
911d1aaf 3612 struct nfs_lockt_args arg = {
1da177e4 3613 .fh = NFS_FH(inode),
911d1aaf 3614 .fl = request,
1da177e4 3615 };
911d1aaf
TM		 3616 struct nfs_lockt_res res = {
3617 .denied = request,
1da177e4
LT		 3618 };
3619 struct rpc_message msg = {
3620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3621 .rpc_argp = &arg,
3622 .rpc_resp = &res,
3623 .rpc_cred = state->owner->so_cred,
3624 };
1da177e4
LT		 3625 struct nfs4_lock_state *lsp;
3626 int status;
3627
911d1aaf 3628 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3629 status = nfs4_set_lock_state(state, request);
3630 if (status != 0)
3631 goto out;
3632 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3633 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3634 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3635 switch (status) {
3636 case 0:
3637 request->fl_type = F_UNLCK;
3638 break;
3639 case -NFS4ERR_DENIED:
3640 status = 0;
1da177e4 3641 }
70cc6487 3642 request->fl_ops->fl_release_private(request);
8d0a8a9d 3643out:
1da177e4
LT		 3644 return status;
3645}
3646
3647static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3648{
3649 struct nfs4_exception exception = { };
3650 int err;
3651
3652 do {
3653 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3654 _nfs4_proc_getlk(state, cmd, request),
3655 &exception);
3656 } while (exception.retry);
3657 return err;
3658}
3659
3660static int do_vfs_lock(struct file *file, struct file_lock *fl)
3661{
3662 int res = 0;
3663 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3664 case FL_POSIX:
3665 res = posix_lock_file_wait(file, fl);
3666 break;
3667 case FL_FLOCK:
3668 res = flock_lock_file_wait(file, fl);
3669 break;
3670 default:
3671 BUG();
3672 }
1da177e4
LT		 3673 return res;
3674}
3675
faf5f49c 3676struct nfs4_unlockdata {
911d1aaf
TM		 3677 struct nfs_locku_args arg;
3678 struct nfs_locku_res res;
faf5f49c
TM		 3679 struct nfs4_lock_state *lsp;
3680 struct nfs_open_context *ctx;
911d1aaf
TM		 3681 struct file_lock fl;
3682 const struct nfs_server *server;
26e976a8 3683 unsigned long timestamp;
faf5f49c
TM		 3684};
3685
911d1aaf
TM		 3686static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3687 struct nfs_open_context *ctx,
3688 struct nfs4_lock_state *lsp,
3689 struct nfs_seqid *seqid)
3690{
3691 struct nfs4_unlockdata *p;
3692 struct inode *inode = lsp->ls_state->inode;
3693
a893693c 3694 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3695 if (p == NULL)
3696 return NULL;
3697 p->arg.fh = NFS_FH(inode);
3698 p->arg.fl = &p->fl;
3699 p->arg.seqid = seqid;
c1d51931 3700 p->res.seqid = seqid;
5f7dbd5c 3701 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3702 p->arg.stateid = &lsp->ls_stateid;
3703 p->lsp = lsp;
3704 atomic_inc(&lsp->ls_count);
3705 /* Ensure we don't close file until we're done freeing locks! */
3706 p->ctx = get_nfs_open_context(ctx);
3707 memcpy(&p->fl, fl, sizeof(p->fl));
3708 p->server = NFS_SERVER(inode);
3709 return p;
3710}
3711
06f814a3 3712static void nfs4_locku_release_calldata(void *data)
faf5f49c 3713{
963d8fe5 3714 struct nfs4_unlockdata *calldata = data;
911d1aaf 3715 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3716 nfs4_put_lock_state(calldata->lsp);
3717 put_nfs_open_context(calldata->ctx);
3718 kfree(calldata);
faf5f49c
TM		 3719}
3720
963d8fe5 3721static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3722{
963d8fe5 3723 struct nfs4_unlockdata *calldata = data;
faf5f49c 3724
a893693c
AA		 3725 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3726 task->tk_status);
06f814a3
TM		 3727 if (RPC_ASSASSINATED(task))
3728 return;
faf5f49c
TM		 3729 switch (task->tk_status) {
3730 case 0:
3731 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3732 calldata->res.stateid.data,
faf5f49c 3733 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3734 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3735 break;
9e33bed5
TM		 3736 case -NFS4ERR_BAD_STATEID:
3737 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3738 case -NFS4ERR_STALE_STATEID:
3739 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3740 break;
3741 default:
9e33bed5 3742 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3743 nfs4_restart_rpc(task,
3744 calldata->server->nfs_client);
faf5f49c 3745 }
a893693c
AA		 3746 nfs4_sequence_free_slot(calldata->server->nfs_client,
3747 &calldata->res.seq_res);
faf5f49c
TM		 3748}
3749
4ce70ada 3750static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3751{
4ce70ada 3752 struct nfs4_unlockdata *calldata = data;
faf5f49c 3753
911d1aaf 3754 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3755 return;
3756 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3757 /* Note: exit _without_ running nfs4_locku_done */
3758 task->tk_action = NULL;
faf5f49c
TM		 3759 return;
3760 }
26e976a8 3761 calldata->timestamp = jiffies;
a893693c
AA		 3762 if (nfs4_setup_sequence(calldata->server->nfs_client,
3763 &calldata->arg.seq_args,
3764 &calldata->res.seq_res, 1, task))
3765 return;
5138fde0 3766 rpc_call_start(task);
faf5f49c
TM		 3767}
3768
963d8fe5 3769static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3770 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3771 .rpc_call_done = nfs4_locku_done,
06f814a3 3772 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3773};
3774
a5d16a4d
TM		 3775static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3776 struct nfs_open_context *ctx,
3777 struct nfs4_lock_state *lsp,
3778 struct nfs_seqid *seqid)
3779{
3780 struct nfs4_unlockdata *data;
5138fde0
TM		 3781 struct rpc_message msg = {
3782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3783 .rpc_cred = ctx->cred,
3784 };
c970aa85
TM		 3785 struct rpc_task_setup task_setup_data = {
3786 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3787 .rpc_message = &msg,
c970aa85 3788 .callback_ops = &nfs4_locku_ops,
101070ca 3789 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3790 .flags = RPC_TASK_ASYNC,
3791 };
a5d16a4d 3792
137d6aca
FF		 3793 /* Ensure this is an unlock - when canceling a lock, the
3794 * canceled lock is passed in, and it won't be an unlock.
3795 */
3796 fl->fl_type = F_UNLCK;
3797
a5d16a4d
TM		 3798 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3799 if (data == NULL) {
3800 nfs_free_seqid(seqid);
3801 return ERR_PTR(-ENOMEM);
3802 }
3803
5138fde0
TM		 3804 msg.rpc_argp = &data->arg,
3805 msg.rpc_resp = &data->res,
c970aa85
TM		 3806 task_setup_data.callback_data = data;
3807 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3808}
3809
faf5f49c
TM		 3810static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3811{
19e03c57 3812 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3813 struct nfs_seqid *seqid;
1da177e4 3814 struct nfs4_lock_state *lsp;
06f814a3
TM		 3815 struct rpc_task *task;
3816 int status = 0;
536ff0f8 3817 unsigned char fl_flags = request->fl_flags;
faf5f49c 3818
8d0a8a9d 3819 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3820 /* Unlock _before_ we do the RPC call */
3821 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3822 down_read(&nfsi->rwsem);
3823 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3824 up_read(&nfsi->rwsem);
9b073574 3825 goto out;
19e03c57
TM		 3826 }
3827 up_read(&nfsi->rwsem);
8d0a8a9d 3828 if (status != 0)
9b073574
TM		 3829 goto out;
3830 /* Is this a delegated lock? */
3831 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3832 goto out;
8d0a8a9d 3833 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3834 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3835 status = -ENOMEM;
911d1aaf 3836 if (seqid == NULL)
9b073574 3837 goto out;
cd3758e3 3838 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3839 status = PTR_ERR(task);
3840 if (IS_ERR(task))
9b073574 3841 goto out;
a5d16a4d 3842 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3843 rpc_put_task(task);
9b073574 3844out:
536ff0f8 3845 request->fl_flags = fl_flags;
1da177e4
LT		 3846 return status;
3847}
3848
a5d16a4d
TM		 3849struct nfs4_lockdata {
3850 struct nfs_lock_args arg;
3851 struct nfs_lock_res res;
3852 struct nfs4_lock_state *lsp;
3853 struct nfs_open_context *ctx;
3854 struct file_lock fl;
26e976a8 3855 unsigned long timestamp;
a5d16a4d
TM		 3856 int rpc_status;
3857 int cancelled;
66179efe 3858 struct nfs_server *server;
a5d16a4d
TM		 3859};
3860
3861static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3862 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3863{
a5d16a4d
TM		 3864 struct nfs4_lockdata *p;
3865 struct inode *inode = lsp->ls_state->inode;
1da177e4 3866 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3867
3868 p = kzalloc(sizeof(*p), GFP_KERNEL);
3869 if (p == NULL)
3870 return NULL;
3871
3872 p->arg.fh = NFS_FH(inode);
3873 p->arg.fl = &p->fl;
2f74c0a0
TM		 3874 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3875 if (p->arg.open_seqid == NULL)
3876 goto out_free;
a5d16a4d
TM		 3877 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3878 if (p->arg.lock_seqid == NULL)
2f74c0a0 3879 goto out_free_seqid;
a5d16a4d 3880 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3881 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3882 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3883 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3884 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3885 p->lsp = lsp;
66179efe 3886 p->server = server;
a5d16a4d
TM		 3887 atomic_inc(&lsp->ls_count);
3888 p->ctx = get_nfs_open_context(ctx);
3889 memcpy(&p->fl, fl, sizeof(p->fl));
3890 return p;
2f74c0a0
TM		 3891out_free_seqid:
3892 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3893out_free:
3894 kfree(p);
3895 return NULL;
3896}
3897
3898static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3899{
3900 struct nfs4_lockdata *data = calldata;
3901 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3902
3110ff80 3903 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3904 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3905 return;
a5d16a4d
TM		 3906 /* Do we need to do an open_to_lock_owner? */
3907 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3908 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3909 return;
a5d16a4d
TM		 3910 data->arg.open_stateid = &state->stateid;
3911 data->arg.new_lock_owner = 1;
c1d51931 3912 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3913 } else
3914 data->arg.new_lock_owner = 0;
26e976a8 3915 data->timestamp = jiffies;
66179efe
AA		 3916 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3917 &data->res.seq_res, 1, task))
3918 return;
5138fde0 3919 rpc_call_start(task);
3110ff80 3920 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3921}
3922
3923static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3924{
3925 struct nfs4_lockdata *data = calldata;
3926
3110ff80 3927 dprintk("%s: begin!\n", __func__);
a5d16a4d 3928
66179efe
AA		 3929 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3930 task->tk_status);
3931
a5d16a4d
TM		 3932 data->rpc_status = task->tk_status;
3933 if (RPC_ASSASSINATED(task))
3934 goto out;
3935 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3936 if (data->rpc_status == 0)
3937 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3938 else
3939 goto out;
3940 }
3941 if (data->rpc_status == 0) {
3942 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3943 sizeof(data->lsp->ls_stateid.data));
3944 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3945 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3946 }
a5d16a4d 3947out:
3110ff80 3948 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3949}
3950
3951static void nfs4_lock_release(void *calldata)
3952{
3953 struct nfs4_lockdata *data = calldata;
3954
3110ff80 3955 dprintk("%s: begin!\n", __func__);
2f74c0a0 3956 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3957 if (data->cancelled != 0) {
3958 struct rpc_task *task;
3959 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3960 data->arg.lock_seqid);
3961 if (!IS_ERR(task))
e6b3c4db 3962 rpc_put_task(task);
3110ff80 3963 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3964 } else
3965 nfs_free_seqid(data->arg.lock_seqid);
3966 nfs4_put_lock_state(data->lsp);
3967 put_nfs_open_context(data->ctx);
3968 kfree(data);
3110ff80 3969 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3970}
3971
3972static const struct rpc_call_ops nfs4_lock_ops = {
3973 .rpc_call_prepare = nfs4_lock_prepare,
3974 .rpc_call_done = nfs4_lock_done,
3975 .rpc_release = nfs4_lock_release,
3976};
3977
3978static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3979{
3980 struct nfs4_lockdata *data;
3981 struct rpc_task *task;
5138fde0
TM		 3982 struct rpc_message msg = {
3983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3984 .rpc_cred = state->owner->so_cred,
3985 };
c970aa85
TM		 3986 struct rpc_task_setup task_setup_data = {
3987 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3988 .rpc_message = &msg,
c970aa85 3989 .callback_ops = &nfs4_lock_ops,
101070ca 3990 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3991 .flags = RPC_TASK_ASYNC,
3992 };
a5d16a4d
TM		 3993 int ret;
3994
3110ff80 3995 dprintk("%s: begin!\n", __func__);
cd3758e3 3996 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3997 fl->fl_u.nfs4_fl.owner);
3998 if (data == NULL)
3999 return -ENOMEM;
4000 if (IS_SETLKW(cmd))
4001 data->arg.block = 1;
4002 if (reclaim != 0)
4003 data->arg.reclaim = 1;
5138fde0
TM		 4004 msg.rpc_argp = &data->arg,
4005 msg.rpc_resp = &data->res,
c970aa85
TM		 4006 task_setup_data.callback_data = data;
4007 task = rpc_run_task(&task_setup_data);
7a1218a2 4008 if (IS_ERR(task))
a5d16a4d 4009 return PTR_ERR(task);
a5d16a4d
TM		 4010 ret = nfs4_wait_for_completion_rpc_task(task);
4011 if (ret == 0) {
4012 ret = data->rpc_status;
a5d16a4d
TM		 4013 } else
4014 data->cancelled = 1;
e6b3c4db 4015 rpc_put_task(task);
3110ff80 4016 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4017 return ret;
1da177e4
LT		 4018}
4019
4020static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4021{
202b50dc
TM		 4022 struct nfs_server *server = NFS_SERVER(state->inode);
4023 struct nfs4_exception exception = { };
4024 int err;
4025
4026 do {
42a2d13e
TM		 4027 /* Cache the lock if possible... */
4028 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4029 return 0;
202b50dc
TM		 4030 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4031 if (err != -NFS4ERR_DELAY)
4032 break;
4033 nfs4_handle_exception(server, err, &exception);
4034 } while (exception.retry);
4035 return err;
1da177e4
LT		 4036}
4037
4038static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4039{
202b50dc
TM		 4040 struct nfs_server *server = NFS_SERVER(state->inode);
4041 struct nfs4_exception exception = { };
4042 int err;
4043
6bfc93ef
TM		 4044 err = nfs4_set_lock_state(state, request);
4045 if (err != 0)
4046 return err;
202b50dc 4047 do {
42a2d13e
TM		 4048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4049 return 0;
202b50dc
TM		 4050 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4051 if (err != -NFS4ERR_DELAY)
4052 break;
4053 nfs4_handle_exception(server, err, &exception);
4054 } while (exception.retry);
4055 return err;
1da177e4
LT		 4056}
4057
4058static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4059{
19e03c57 4060 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4061 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4062 int status;
4063
6bfc93ef 4064 /* Is this a delegated open? */
6bfc93ef
TM		 4065 status = nfs4_set_lock_state(state, request);
4066 if (status != 0)
4067 goto out;
01c3b861
TM		 4068 request->fl_flags |= FL_ACCESS;
4069 status = do_vfs_lock(request->fl_file, request);
4070 if (status < 0)
4071 goto out;
19e03c57 4072 down_read(&nfsi->rwsem);
01c3b861 4073 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4074 /* Yes: cache locks! */
01c3b861 4075 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4076 request->fl_flags = fl_flags & ~FL_SLEEP;
4077 status = do_vfs_lock(request->fl_file, request);
4078 goto out_unlock;
01c3b861 4079 }
6bfc93ef
TM		 4080 status = _nfs4_do_setlk(state, cmd, request, 0);
4081 if (status != 0)
01c3b861 4082 goto out_unlock;
6bfc93ef 4083 /* Note: we always want to sleep here! */
01c3b861 4084 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4085 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4086 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4087out_unlock:
19e03c57 4088 up_read(&nfsi->rwsem);
01c3b861
TM		 4089out:
4090 request->fl_flags = fl_flags;
1da177e4
LT		 4091 return status;
4092}
4093
4094static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4095{
4096 struct nfs4_exception exception = { };
4097 int err;
4098
4099 do {
965b5d67
TM		 4100 err = _nfs4_proc_setlk(state, cmd, request);
4101 if (err == -NFS4ERR_DENIED)
4102 err = -EAGAIN;
1da177e4 4103 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4104 err, &exception);
1da177e4
LT		 4105 } while (exception.retry);
4106 return err;
4107}
4108
4109static int
4110nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4111{
4112 struct nfs_open_context *ctx;
4113 struct nfs4_state *state;
4114 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4115 int status;
4116
4117 /* verify open state */
cd3758e3 4118 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4119 state = ctx->state;
4120
4121 if (request->fl_start < 0 || request->fl_end < 0)
4122 return -EINVAL;
4123
d953126a
TM		 4124 if (IS_GETLK(cmd)) {
4125 if (state != NULL)
4126 return nfs4_proc_getlk(state, F_GETLK, request);
4127 return 0;
4128 }
1da177e4
LT		 4129
4130 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4131 return -EINVAL;
4132
d953126a
TM		 4133 if (request->fl_type == F_UNLCK) {
4134 if (state != NULL)
4135 return nfs4_proc_unlck(state, cmd, request);
4136 return 0;
4137 }
1da177e4 4138
d953126a
TM		 4139 if (state == NULL)
4140 return -ENOLCK;
1da177e4
LT		 4141 do {
4142 status = nfs4_proc_setlk(state, cmd, request);
4143 if ((status != -EAGAIN) || IS_SETLK(cmd))
4144 break;
4145 timeout = nfs4_set_lock_task_retry(timeout);
4146 status = -ERESTARTSYS;
4147 if (signalled())
4148 break;
4149 } while(status < 0);
1da177e4
LT		 4150 return status;
4151}
4152
888e694c
TM		 4153int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4154{
4155 struct nfs_server *server = NFS_SERVER(state->inode);
4156 struct nfs4_exception exception = { };
4157 int err;
4158
4159 err = nfs4_set_lock_state(state, fl);
4160 if (err != 0)
4161 goto out;
4162 do {
4163 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4164 switch (err) {
4165 default:
4166 printk(KERN_ERR "%s: unhandled error %d.\n",
4167 __func__, err);
4168 case 0:
965b5d67 4169 case -ESTALE:
d5122201
TM		 4170 goto out;
4171 case -NFS4ERR_EXPIRED:
4172 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4173 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4174 nfs4_schedule_state_recovery(server->nfs_client);
4175 goto out;
965b5d67
TM		 4176 case -ERESTARTSYS:
4177 /*
4178 * The show must go on: exit, but mark the
4179 * stateid as needing recovery.
4180 */
4181 case -NFS4ERR_ADMIN_REVOKED:
4182 case -NFS4ERR_BAD_STATEID:
4183 case -NFS4ERR_OPENMODE:
4184 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4185 err = 0;
4186 goto out;
4187 case -ENOMEM:
4188 case -NFS4ERR_DENIED:
4189 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4190 err = 0;
4191 goto out;
d5122201
TM		 4192 case -NFS4ERR_DELAY:
4193 break;
4194 }
888e694c
TM		 4195 err = nfs4_handle_exception(server, err, &exception);
4196 } while (exception.retry);
4197out:
4198 return err;
4199}
6b3b5496 4200
aa1870af
BF		 4201#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4202
6b3b5496
BF		 4203int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4204 size_t buflen, int flags)
4205{
4b580ee3
BF		 4206 struct inode *inode = dentry->d_inode;
4207
4208 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4209 return -EOPNOTSUPP;
4210
4b580ee3 4211 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4212}
4213
4214/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4215 * and that's what we'll do for e.g. user attributes that haven't been set.
4216 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4217 * attributes in kernel-managed attribute namespaces. */
4218ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4219 size_t buflen)
4220{
aa1870af
BF		 4221 struct inode *inode = dentry->d_inode;
4222
4223 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4224 return -EOPNOTSUPP;
4225
4226 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4227}
4228
4229ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4230{
aa1870af 4231 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4232
096455a2
BF		 4233 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4234 return 0;
6b3b5496
BF		 4235 if (buf && buflen < len)
4236 return -ERANGE;
4237 if (buf)
aa1870af
BF		 4238 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4239 return len;
6b3b5496
BF		 4240}
4241
69aaaae1
TM		 4242static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4243{
4244 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4245 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4246 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4247 return;
4248
4249 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4250 NFS_ATTR_FATTR_NLINK;
4251 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4252 fattr->nlink = 2;
4253}
4254
56659e99 4255int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4256 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4257{
4258 struct nfs_server *server = NFS_SERVER(dir);
4259 u32 bitmask[2] = {
361e624f
MN		 4260 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4261 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4262 };
4263 struct nfs4_fs_locations_arg args = {
4264 .dir_fh = NFS_FH(dir),
c228fd3a 4265 .name = name,
683b57b4
TM		 4266 .page = page,
4267 .bitmask = bitmask,
4268 };
22958463
BH		 4269 struct nfs4_fs_locations_res res = {
4270 .fs_locations = fs_locations,
4271 };
683b57b4
TM		 4272 struct rpc_message msg = {
4273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4274 .rpc_argp = &args,
22958463 4275 .rpc_resp = &res,
683b57b4
TM		 4276 };
4277 int status;
4278
3110ff80 4279 dprintk("%s: start\n", __func__);
c228fd3a 4280 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4281 fs_locations->server = server;
830b8e33 4282 fs_locations->nlocations = 0;
cccef3b9 4283 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4284 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4285 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4286 return status;
4287}
4288
557134a3 4289#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4290/*
4291 * nfs4_proc_exchange_id()
4292 *
4293 * Since the clientid has expired, all compounds using sessions
4294 * associated with the stale clientid will be returning
4295 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4296 * be in some phase of session reset.
4297 */
4298static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4299{
4300 nfs4_verifier verifier;
4301 struct nfs41_exchange_id_args args = {
4302 .client = clp,
4303 .flags = clp->cl_exchange_flags,
4304 };
4305 struct nfs41_exchange_id_res res = {
4306 .client = clp,
4307 };
4308 int status;
4309 struct rpc_message msg = {
4310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4311 .rpc_argp = &args,
4312 .rpc_resp = &res,
4313 .rpc_cred = cred,
4314 };
4315 __be32 *p;
4316
4317 dprintk("--> %s\n", __func__);
4318 BUG_ON(clp == NULL);
a7b72103 4319
99fe60d0
BH		 4320 p = (u32 *)verifier.data;
4321 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4322 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4323 args.verifier = &verifier;
4324
4325 while (1) {
4326 args.id_len = scnprintf(args.id, sizeof(args.id),
4327 "%s/%s %u",
4328 clp->cl_ipaddr,
4329 rpc_peeraddr2str(clp->cl_rpcclient,
4330 RPC_DISPLAY_ADDR),
4331 clp->cl_id_uniquifier);
4332
4333 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4334
4335 if (status != NFS4ERR_CLID_INUSE)
4336 break;
4337
4338 if (signalled())
4339 break;
4340
4341 if (++clp->cl_id_uniquifier == 0)
4342 break;
4343 }
4344
4345 dprintk("<-- %s status= %d\n", __func__, status);
4346 return status;
4347}
4348
2050f0cc
AA		 4349struct nfs4_get_lease_time_data {
4350 struct nfs4_get_lease_time_args *args;
4351 struct nfs4_get_lease_time_res *res;
4352 struct nfs_client *clp;
4353};
4354
4355static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4356 void *calldata)
4357{
4358 int ret;
4359 struct nfs4_get_lease_time_data *data =
4360 (struct nfs4_get_lease_time_data *)calldata;
4361
4362 dprintk("--> %s\n", __func__);
4363 /* just setup sequence, do not trigger session recovery
4364 since we're invoked within one */
4365 ret = nfs41_setup_sequence(data->clp->cl_session,
4366 &data->args->la_seq_args,
4367 &data->res->lr_seq_res, 0, task);
4368
4369 BUG_ON(ret == -EAGAIN);
4370 rpc_call_start(task);
4371 dprintk("<-- %s\n", __func__);
4372}
4373
4374/*
4375 * Called from nfs4_state_manager thread for session setup, so don't recover
4376 * from sequence operation or clientid errors.
4377 */
4378static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4379{
4380 struct nfs4_get_lease_time_data *data =
4381 (struct nfs4_get_lease_time_data *)calldata;
4382
4383 dprintk("--> %s\n", __func__);
4384 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4385 switch (task->tk_status) {
4386 case -NFS4ERR_DELAY:
4387 case -NFS4ERR_GRACE:
4388 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4389 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4390 task->tk_status = 0;
eedc020e 4391 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4392 return;
4393 }
4394 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4395 dprintk("<-- %s\n", __func__);
4396}
4397
4398struct rpc_call_ops nfs4_get_lease_time_ops = {
4399 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4400 .rpc_call_done = nfs4_get_lease_time_done,
4401};
4402
4403int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4404{
4405 struct rpc_task *task;
4406 struct nfs4_get_lease_time_args args;
4407 struct nfs4_get_lease_time_res res = {
4408 .lr_fsinfo = fsinfo,
4409 };
4410 struct nfs4_get_lease_time_data data = {
4411 .args = &args,
4412 .res = &res,
4413 .clp = clp,
4414 };
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4417 .rpc_argp = &args,
4418 .rpc_resp = &res,
4419 };
4420 struct rpc_task_setup task_setup = {
4421 .rpc_client = clp->cl_rpcclient,
4422 .rpc_message = &msg,
4423 .callback_ops = &nfs4_get_lease_time_ops,
4424 .callback_data = &data
4425 };
4426 int status;
4427
4428 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4429 dprintk("--> %s\n", __func__);
4430 task = rpc_run_task(&task_setup);
4431
4432 if (IS_ERR(task))
4433 status = PTR_ERR(task);
4434 else {
4435 status = task->tk_status;
4436 rpc_put_task(task);
4437 }
4438 dprintk("<-- %s return %d\n", __func__, status);
4439
4440 return status;
4441}
4442
b73dafa7
RL		 4443/*
4444 * Reset a slot table
4445 */
4446static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4447 int old_max_slots, int ivalue)
ac72b7b3 4448{
b73dafa7 4449 int i;
ac72b7b3
AA		 4450 int ret = 0;
4451
b73dafa7 4452 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4453
b73dafa7
RL		 4454 /*
4455 * Until we have dynamic slot table adjustment, insist
4456 * upon the same slot table size
4457 */
ac72b7b3
AA		 4458 if (max_slots != old_max_slots) {
4459 dprintk("%s reset slot table does't match old\n",
4460 __func__);
4461 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4462 goto out;
4463 }
4464 spin_lock(&tbl->slot_tbl_lock);
4465 for (i = 0; i < max_slots; ++i)
b73dafa7 4466 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4467 tbl->highest_used_slotid = -1;
4468 spin_unlock(&tbl->slot_tbl_lock);
4469 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4470 tbl, tbl->slots, tbl->max_slots);
4471out:
4472 dprintk("<-- %s: return %d\n", __func__, ret);
4473 return ret;
4474}
4475
b73dafa7
RL		 4476/*
4477 * Reset the forechannel and backchannel slot tables
4478 */
4479static int nfs4_reset_slot_tables(struct nfs4_session *session)
4480{
4481 int status;
4482
4483 status = nfs4_reset_slot_table(&session->fc_slot_table,
4484 session->fc_attrs.max_reqs,
4485 session->fc_slot_table.max_slots,
4486 1);
f8625a6a
RL		 4487 if (status)
4488 return status;
4489
4490 status = nfs4_reset_slot_table(&session->bc_slot_table,
4491 session->bc_attrs.max_reqs,
4492 session->bc_slot_table.max_slots,
4493 0);
b73dafa7
RL		 4494 return status;
4495}
4496
f8625a6a
RL		 4497/* Destroy the slot table */
4498static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4499{
4500 if (session->fc_slot_table.slots != NULL) {
4501 kfree(session->fc_slot_table.slots);
4502 session->fc_slot_table.slots = NULL;
4503 }
4504 if (session->bc_slot_table.slots != NULL) {
4505 kfree(session->bc_slot_table.slots);
4506 session->bc_slot_table.slots = NULL;
4507 }
4508 return;
4509}
4510
fc931582
AA		 4511/*
4512 * Initialize slot table
4513 */
050047ce
RL		 4514static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4515 int max_slots, int ivalue)
fc931582 4516{
050047ce 4517 int i;
fc931582
AA		 4518 struct nfs4_slot *slot;
4519 int ret = -ENOMEM;
4520
4521 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4522
050047ce 4523 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4524
4525 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4526 if (!slot)
4527 goto out;
4528 for (i = 0; i < max_slots; ++i)
050047ce 4529 slot[i].seq_nr = ivalue;
fc931582
AA		 4530 ret = 0;
4531
4532 spin_lock(&tbl->slot_tbl_lock);
4533 if (tbl->slots != NULL) {
4534 spin_unlock(&tbl->slot_tbl_lock);
4535 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4536 __func__, tbl, tbl->slots);
4537 WARN_ON(1);
4538 goto out_free;
4539 }
4540 tbl->max_slots = max_slots;
4541 tbl->slots = slot;
4542 tbl->highest_used_slotid = -1; /* no slot is currently used */
4543 spin_unlock(&tbl->slot_tbl_lock);
4544 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4545 tbl, tbl->slots, tbl->max_slots);
4546out:
4547 dprintk("<-- %s: return %d\n", __func__, ret);
4548 return ret;
050047ce 4549
fc931582
AA		 4550out_free:
4551 kfree(slot);
4552 goto out;
4553}
4554
050047ce
RL		 4555/*
4556 * Initialize the forechannel and backchannel tables
4557 */
4558static int nfs4_init_slot_tables(struct nfs4_session *session)
4559{
4560 int status;
4561
4562 status = nfs4_init_slot_table(&session->fc_slot_table,
4563 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4564 if (status)
4565 return status;
050047ce 4566
f8625a6a
RL		 4567 status = nfs4_init_slot_table(&session->bc_slot_table,
4568 session->bc_attrs.max_reqs, 0);
4569 if (status)
4570 nfs4_destroy_slot_tables(session);
4571
4572 return status;
557134a3
AA		 4573}
4574
4575struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4576{
4577 struct nfs4_session *session;
4578 struct nfs4_slot_table *tbl;
4579
4580 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4581 if (!session)
4582 return NULL;
76db6d95
AA		 4583
4584 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4585 /*
4586 * The create session reply races with the server back
4587 * channel probe. Mark the client NFS_CS_SESSION_INITING
4588 * so that the client back channel can find the
4589 * nfs_client struct
4590 */
4591 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4592
557134a3
AA		 4593 tbl = &session->fc_slot_table;
4594 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4595 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4596
4597 tbl = &session->bc_slot_table;
4598 spin_lock_init(&tbl->slot_tbl_lock);
4599 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4600
557134a3
AA		 4601 session->clp = clp;
4602 return session;
4603}
4604
4605void nfs4_destroy_session(struct nfs4_session *session)
4606{
5a0ffe54
AA		 4607 nfs4_proc_destroy_session(session);
4608 dprintk("%s Destroy backchannel for xprt %p\n",
4609 __func__, session->clp->cl_rpcclient->cl_xprt);
4610 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4611 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4612 nfs4_destroy_slot_tables(session);
557134a3
AA		 4613 kfree(session);
4614}
4615
fc931582
AA		 4616/*
4617 * Initialize the values to be used by the client in CREATE_SESSION
4618 * If nfs4_init_session set the fore channel request and response sizes,
4619 * use them.
4620 *
4621 * Set the back channel max_resp_sz_cached to zero to force the client to
4622 * always set csa_cachethis to FALSE because the current implementation
4623 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4624 */
4625static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4626{
4627 struct nfs4_session *session = args->client->cl_session;
4628 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4629 mxresp_sz = session->fc_attrs.max_resp_sz;
4630
4631 if (mxrqst_sz == 0)
4632 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4633 if (mxresp_sz == 0)
4634 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4635 /* Fore channel attributes */
4636 args->fc_attrs.headerpadsz = 0;
4637 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4638 args->fc_attrs.max_resp_sz = mxresp_sz;
4639 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4640 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4641 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4642
4643 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4644 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4645 __func__,
4646 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4647 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4648 args->fc_attrs.max_reqs);
4649
4650 /* Back channel attributes */
4651 args->bc_attrs.headerpadsz = 0;
4652 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4653 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4654 args->bc_attrs.max_resp_sz_cached = 0;
4655 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4656 args->bc_attrs.max_reqs = 1;
4657
4658 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4659 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4660 __func__,
4661 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4662 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4663 args->bc_attrs.max_reqs);
4664}
4665
8d35301d
AA		 4666static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4667{
4668 if (rcvd <= sent)
4669 return 0;
4670 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4671 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4672 return -EINVAL;
4673}
4674
4675#define _verify_fore_channel_attr(_name_) \
4676 _verify_channel_attr("fore", #_name_, \
4677 args->fc_attrs._name_, \
4678 session->fc_attrs._name_)
4679
4680#define _verify_back_channel_attr(_name_) \
4681 _verify_channel_attr("back", #_name_, \
4682 args->bc_attrs._name_, \
4683 session->bc_attrs._name_)
4684
4685/*
4686 * The server is not allowed to increase the fore channel header pad size,
4687 * maximum response size, or maximum number of operations.
4688 *
4689 * The back channel attributes are only negotiatied down: We send what the
4690 * (back channel) server insists upon.
4691 */
4692static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4693 struct nfs4_session *session)
4694{
4695 int ret = 0;
4696
4697 ret |= _verify_fore_channel_attr(headerpadsz);
4698 ret |= _verify_fore_channel_attr(max_resp_sz);
4699 ret |= _verify_fore_channel_attr(max_ops);
4700
4701 ret |= _verify_back_channel_attr(headerpadsz);
4702 ret |= _verify_back_channel_attr(max_rqst_sz);
4703 ret |= _verify_back_channel_attr(max_resp_sz);
4704 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4705 ret |= _verify_back_channel_attr(max_ops);
4706 ret |= _verify_back_channel_attr(max_reqs);
4707
4708 return ret;
4709}
4710
fc931582
AA		 4711static int _nfs4_proc_create_session(struct nfs_client *clp)
4712{
4713 struct nfs4_session *session = clp->cl_session;
4714 struct nfs41_create_session_args args = {
4715 .client = clp,
4716 .cb_program = NFS4_CALLBACK,
4717 };
4718 struct nfs41_create_session_res res = {
4719 .client = clp,
4720 };
4721 struct rpc_message msg = {
4722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4723 .rpc_argp = &args,
4724 .rpc_resp = &res,
4725 };
4726 int status;
4727
4728 nfs4_init_channel_attrs(&args);
0f91421e 4729 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4730
4731 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4732
8d35301d
AA		 4733 if (!status)
4734 /* Verify the session's negotiated channel_attrs values */
4735 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4736 if (!status) {
4737 /* Increment the clientid slot sequence id */
4738 clp->cl_seqid++;
4739 }
4740
4741 return status;
4742}
4743
4744/*
4745 * Issues a CREATE_SESSION operation to the server.
4746 * It is the responsibility of the caller to verify the session is
4747 * expired before calling this routine.
4748 */
ac72b7b3 4749int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4750{
4751 int status;
4752 unsigned *ptr;
4753 struct nfs_fsinfo fsinfo;
4754 struct nfs4_session *session = clp->cl_session;
4755
4756 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4757
4758 status = _nfs4_proc_create_session(clp);
4759 if (status)
4760 goto out;
4761
ac72b7b3
AA		 4762 /* Init or reset the fore channel */
4763 if (reset)
b73dafa7 4764 status = nfs4_reset_slot_tables(session);
ac72b7b3 4765 else
050047ce 4766 status = nfs4_init_slot_tables(session);
fc931582
AA		 4767 dprintk("fore channel slot table initialization returned %d\n", status);
4768 if (status)
4769 goto out;
4770
4771 ptr = (unsigned *)&session->sess_id.data[0];
4772 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4773 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4774
ac72b7b3
AA		 4775 if (reset)
4776 /* Lease time is aleady set */
4777 goto out;
4778
fc931582
AA		 4779 /* Get the lease time */
4780 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4781 if (status == 0) {
4782 /* Update lease time and schedule renewal */
4783 spin_lock(&clp->cl_lock);
4784 clp->cl_lease_time = fsinfo.lease_time * HZ;
4785 clp->cl_last_renewal = jiffies;
4786 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4787 spin_unlock(&clp->cl_lock);
4788
4789 nfs4_schedule_state_renewal(clp);
4790 }
4791out:
4792 dprintk("<-- %s\n", __func__);
4793 return status;
4794}
4795
0f3e66c6
AA		 4796/*
4797 * Issue the over-the-wire RPC DESTROY_SESSION.
4798 * The caller must serialize access to this routine.
4799 */
4800int nfs4_proc_destroy_session(struct nfs4_session *session)
4801{
4802 int status = 0;
4803 struct rpc_message msg;
4804
4805 dprintk("--> nfs4_proc_destroy_session\n");
4806
4807 /* session is still being setup */
4808 if (session->clp->cl_cons_state != NFS_CS_READY)
4809 return status;
4810
4811 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4812 msg.rpc_argp = session;
4813 msg.rpc_resp = NULL;
4814 msg.rpc_cred = NULL;
4815 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4816
4817 if (status)
4818 printk(KERN_WARNING
4819 "Got error %d from the server on DESTROY_SESSION. "
4820 "Session has been destroyed regardless...\n", status);
4821
4822 dprintk("<-- nfs4_proc_destroy_session\n");
4823 return status;
4824}
4825
fccba804
TM		 4826int nfs4_init_session(struct nfs_server *server)
4827{
4828 struct nfs_client *clp = server->nfs_client;
4829 int ret;
4830
4831 if (!nfs4_has_session(clp))
4832 return 0;
4833
4834 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4835 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4836 ret = nfs4_recover_expired_lease(server);
4837 if (!ret)
4838 ret = nfs4_check_client_ready(clp);
4839 return ret;
4840}
4841
fc01cea9
AA		 4842/*
4843 * Renew the cl_session lease.
4844 */
4845static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4846{
4847 struct nfs4_sequence_args args;
4848 struct nfs4_sequence_res res;
4849
4850 struct rpc_message msg = {
4851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4852 .rpc_argp = &args,
4853 .rpc_resp = &res,
4854 .rpc_cred = cred,
4855 };
4856
4857 args.sa_cache_this = 0;
4858
4859 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4860 &res, 0);
4861}
4862
4863void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4864{
4865 struct nfs_client *clp = (struct nfs_client *)data;
4866
4867 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4868
4869 if (task->tk_status < 0) {
4870 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4871
4872 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4873 == -EAGAIN) {
eedc020e 4874 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4875 return;
4876 }
4877 }
4878 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4879 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4880
4881 put_rpccred(task->tk_msg.rpc_cred);
4882 kfree(task->tk_msg.rpc_argp);
4883 kfree(task->tk_msg.rpc_resp);
4884
4885 dprintk("<-- %s\n", __func__);
4886}
4887
4888static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4889{
4890 struct nfs_client *clp;
4891 struct nfs4_sequence_args *args;
4892 struct nfs4_sequence_res *res;
4893
4894 clp = (struct nfs_client *)data;
4895 args = task->tk_msg.rpc_argp;
4896 res = task->tk_msg.rpc_resp;
4897
4898 if (nfs4_setup_sequence(clp, args, res, 0, task))
4899 return;
4900 rpc_call_start(task);
4901}
4902
4903static const struct rpc_call_ops nfs41_sequence_ops = {
4904 .rpc_call_done = nfs41_sequence_call_done,
4905 .rpc_call_prepare = nfs41_sequence_prepare,
4906};
4907
4908static int nfs41_proc_async_sequence(struct nfs_client *clp,
4909 struct rpc_cred *cred)
4910{
4911 struct nfs4_sequence_args *args;
4912 struct nfs4_sequence_res *res;
4913 struct rpc_message msg = {
4914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4915 .rpc_cred = cred,
4916 };
4917
4918 args = kzalloc(sizeof(*args), GFP_KERNEL);
4919 if (!args)
4920 return -ENOMEM;
4921 res = kzalloc(sizeof(*res), GFP_KERNEL);
4922 if (!res) {
4923 kfree(args);
4924 return -ENOMEM;
4925 }
4926 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4927 msg.rpc_argp = args;
4928 msg.rpc_resp = res;
4929
4930 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4931 &nfs41_sequence_ops, (void *)clp);
4932}
4933
557134a3
AA		 4934#endif /* CONFIG_NFS_V4_1 */
4935
591d71cb 4936struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4937 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4938 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4939 .recover_open = nfs4_open_reclaim,
4940 .recover_lock = nfs4_lock_reclaim,
591d71cb 4941 .establish_clid = nfs4_init_clientid,
90a16617 4942 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4943};
4944
591d71cb
AA		 4945#if defined(CONFIG_NFS_V4_1)
4946struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4947 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4948 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4949 .recover_open = nfs4_open_reclaim,
4950 .recover_lock = nfs4_lock_reclaim,
4951 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4952 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4953};
4954#endif /* CONFIG_NFS_V4_1 */
4955
4956struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4957 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4958 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4959 .recover_open = nfs4_open_expired,
4960 .recover_lock = nfs4_lock_expired,
4961 .establish_clid = nfs4_init_clientid,
90a16617 4962 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4963};
4964
4965#if defined(CONFIG_NFS_V4_1)
4966struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4967 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4968 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4969 .recover_open = nfs4_open_expired,
4970 .recover_lock = nfs4_lock_expired,
591d71cb 4971 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4972 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4973};
591d71cb 4974#endif /* CONFIG_NFS_V4_1 */
1da177e4 4975
29fba38b
BH		 4976struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4977 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4978 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4979 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4980};
4981
4982#if defined(CONFIG_NFS_V4_1)
4983struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4984 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4985 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4986 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4987};
4988#endif
4989
4990/*
4991 * Per minor version reboot and network partition recovery ops
4992 */
4993
591d71cb
AA		 4994struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4995 &nfs40_reboot_recovery_ops,
4996#if defined(CONFIG_NFS_V4_1)
4997 &nfs41_reboot_recovery_ops,
4998#endif
4999};
5000
5001struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5002 &nfs40_nograce_recovery_ops,
5003#if defined(CONFIG_NFS_V4_1)
5004 &nfs41_nograce_recovery_ops,
5005#endif
5006};
5007
29fba38b
BH		 5008struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5009 &nfs40_state_renewal_ops,
5010#if defined(CONFIG_NFS_V4_1)
5011 &nfs41_state_renewal_ops,
5012#endif
5013};
5014
92e1d5be 5015static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 5016 .permission = nfs_permission,
5017 .getattr = nfs_getattr,
5018 .setattr = nfs_setattr,
5019 .getxattr = nfs4_getxattr,
5020 .setxattr = nfs4_setxattr,
5021 .listxattr = nfs4_listxattr,
5022};
5023
509de811 5024const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5025 .version = 4, /* protocol version */
5026 .dentry_ops = &nfs4_dentry_operations,
5027 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5028 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5029 .getroot = nfs4_proc_get_root,
5030 .getattr = nfs4_proc_getattr,
5031 .setattr = nfs4_proc_setattr,
2b3de441 5032 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5033 .lookup = nfs4_proc_lookup,
5034 .access = nfs4_proc_access,
5035 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5036 .create = nfs4_proc_create,
5037 .remove = nfs4_proc_remove,
5038 .unlink_setup = nfs4_proc_unlink_setup,
5039 .unlink_done = nfs4_proc_unlink_done,
5040 .rename = nfs4_proc_rename,
5041 .link = nfs4_proc_link,
5042 .symlink = nfs4_proc_symlink,
5043 .mkdir = nfs4_proc_mkdir,
5044 .rmdir = nfs4_proc_remove,
5045 .readdir = nfs4_proc_readdir,
5046 .mknod = nfs4_proc_mknod,
5047 .statfs = nfs4_proc_statfs,
5048 .fsinfo = nfs4_proc_fsinfo,
5049 .pathconf = nfs4_proc_pathconf,
e9326dca 5050 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5051 .decode_dirent = nfs4_decode_dirent,
5052 .read_setup = nfs4_proc_read_setup,
ec06c096 5053 .read_done = nfs4_read_done,
1da177e4 5054 .write_setup = nfs4_proc_write_setup,
788e7a89 5055 .write_done = nfs4_write_done,
1da177e4 5056 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5057 .commit_done = nfs4_commit_done,
1da177e4 5058 .lock = nfs4_proc_lock,
e50a1c2e 5059 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5060 .close_context = nfs4_close_context,
1da177e4
LT		 5061};
5062
5063/*
5064 * Local variables:
5065 * c-basic-offset: 8
5066 * End:
5067 */
Linux kernel - Deliverables
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