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NFSv4: Don't loop forever on state recovery failure...
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
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));
2006 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2007 server->caps |= NFS_CAP_ACLS;
2008 if (res.has_links != 0)
2009 server->caps |= NFS_CAP_HARDLINKS;
2010 if (res.has_symlinks != 0)
2011 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 2012 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2013 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2014 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2015 server->acl_bitmask = res.acl_bitmask;
2016 }
cccef3b9 2017
1da177e4
LT		 2018 return status;
2019}
2020
55a97593 2021int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2022{
2023 struct nfs4_exception exception = { };
2024 int err;
2025 do {
2026 err = nfs4_handle_exception(server,
2027 _nfs4_server_capabilities(server, fhandle),
2028 &exception);
2029 } while (exception.retry);
2030 return err;
2031}
2032
2033static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2034 struct nfs_fsinfo *info)
2035{
1da177e4
LT		 2036 struct nfs4_lookup_root_arg args = {
2037 .bitmask = nfs4_fattr_bitmap,
2038 };
2039 struct nfs4_lookup_res res = {
2040 .server = server,
0e574af1 2041 .fattr = info->fattr,
1da177e4
LT		 2042 .fh = fhandle,
2043 };
2044 struct rpc_message msg = {
2045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2046 .rpc_argp = &args,
2047 .rpc_resp = &res,
2048 };
008f55d0 2049
0e574af1 2050 nfs_fattr_init(info->fattr);
fccba804 2051 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2052}
2053
2054static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2055 struct nfs_fsinfo *info)
2056{
2057 struct nfs4_exception exception = { };
2058 int err;
2059 do {
2060 err = nfs4_handle_exception(server,
2061 _nfs4_lookup_root(server, fhandle, info),
2062 &exception);
2063 } while (exception.retry);
2064 return err;
2065}
2066
54ceac45
DH		 2067/*
2068 * get the file handle for the "/" directory on the server
2069 */
1da177e4 2070static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2071 struct nfs_fsinfo *info)
1da177e4 2072{
1da177e4
LT		 2073 int status;
2074
1da177e4 2075 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2076 if (status == 0)
2077 status = nfs4_server_capabilities(server, fhandle);
2078 if (status == 0)
2079 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2080 return nfs4_map_errors(status);
1da177e4
LT		 2081}
2082
6b97fd3d
MN		 2083/*
2084 * Get locations and (maybe) other attributes of a referral.
2085 * Note that we'll actually follow the referral later when
2086 * we detect fsid mismatch in inode revalidation
2087 */
56659e99 2088static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2089{
2090 int status = -ENOMEM;
2091 struct page *page = NULL;
2092 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2093
2094 page = alloc_page(GFP_KERNEL);
2095 if (page == NULL)
2096 goto out;
2097 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2098 if (locations == NULL)
2099 goto out;
2100
c228fd3a 2101 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2102 if (status != 0)
2103 goto out;
2104 /* Make sure server returned a different fsid for the referral */
2105 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2106 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2107 status = -EIO;
2108 goto out;
2109 }
2110
2111 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2112 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2113 if (!fattr->mode)
2114 fattr->mode = S_IFDIR;
2115 memset(fhandle, 0, sizeof(struct nfs_fh));
2116out:
2117 if (page)
2118 __free_page(page);
2119 if (locations)
2120 kfree(locations);
2121 return status;
2122}
2123
1da177e4
LT		 2124static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2125{
2126 struct nfs4_getattr_arg args = {
2127 .fh = fhandle,
2128 .bitmask = server->attr_bitmask,
2129 };
2130 struct nfs4_getattr_res res = {
2131 .fattr = fattr,
2132 .server = server,
2133 };
2134 struct rpc_message msg = {
2135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2136 .rpc_argp = &args,
2137 .rpc_resp = &res,
2138 };
2139
0e574af1 2140 nfs_fattr_init(fattr);
cccef3b9 2141 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2142}
2143
2144static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2145{
2146 struct nfs4_exception exception = { };
2147 int err;
2148 do {
2149 err = nfs4_handle_exception(server,
2150 _nfs4_proc_getattr(server, fhandle, fattr),
2151 &exception);
2152 } while (exception.retry);
2153 return err;
2154}
2155
2156/*
2157 * The file is not closed if it is opened due to the a request to change
2158 * the size of the file. The open call will not be needed once the
2159 * VFS layer lookup-intents are implemented.
2160 *
2161 * Close is called when the inode is destroyed.
2162 * If we haven't opened the file for O_WRONLY, we
2163 * need to in the size_change case to obtain a stateid.
2164 *
2165 * Got race?
2166 * Because OPEN is always done by name in nfsv4, it is
2167 * possible that we opened a different file by the same
2168 * name. We can recognize this race condition, but we
2169 * can't do anything about it besides returning an error.
2170 *
2171 * This will be fixed with VFS changes (lookup-intent).
2172 */
2173static int
2174nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2175 struct iattr *sattr)
2176{
08e9eac4 2177 struct inode *inode = dentry->d_inode;
659bfcd6 2178 struct rpc_cred *cred = NULL;
d530838b 2179 struct nfs4_state *state = NULL;
1da177e4
LT		 2180 int status;
2181
0e574af1 2182 nfs_fattr_init(fattr);
1da177e4 2183
d530838b 2184 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2185 if (sattr->ia_valid & ATTR_FILE) {
2186 struct nfs_open_context *ctx;
2187
2188 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2189 if (ctx) {
2190 cred = ctx->cred;
2191 state = ctx->state;
2192 }
659bfcd6 2193 }
08e9eac4 2194
659bfcd6 2195 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2196 if (status == 0)
2197 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2198 return status;
2199}
2200
56659e99
TM		 2201static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2202 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2203 struct nfs_fattr *fattr)
2204{
2205 int status;
2206 struct nfs4_lookup_arg args = {
2207 .bitmask = server->attr_bitmask,
2208 .dir_fh = dirfh,
2209 .name = name,
2210 };
2211 struct nfs4_lookup_res res = {
2212 .server = server,
2213 .fattr = fattr,
2214 .fh = fhandle,
2215 };
2216 struct rpc_message msg = {
2217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2218 .rpc_argp = &args,
2219 .rpc_resp = &res,
2220 };
2221
2222 nfs_fattr_init(fattr);
2223
2224 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2225 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2226 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2227 return status;
2228}
2229
2230static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2231 struct qstr *name, struct nfs_fh *fhandle,
2232 struct nfs_fattr *fattr)
2233{
2234 struct nfs4_exception exception = { };
2235 int err;
2236 do {
4e56e082
TM		 2237 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2238 /* FIXME: !!!! */
2239 if (err == -NFS4ERR_MOVED) {
2240 err = -EREMOTE;
2241 break;
2242 }
2243 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2244 } while (exception.retry);
2245 return err;
2246}
2247
56659e99 2248static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2249 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2250{
4e56e082 2251 int status;
1da177e4
LT		 2252
2253 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2254 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2255 if (status == -NFS4ERR_MOVED)
2256 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2257 dprintk("NFS reply lookup: %d\n", status);
2258 return status;
2259}
2260
2261static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2262{
2263 struct nfs4_exception exception = { };
2264 int err;
2265 do {
2266 err = nfs4_handle_exception(NFS_SERVER(dir),
2267 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2268 &exception);
2269 } while (exception.retry);
2270 return err;
2271}
2272
2273static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2274{
76b32999
TM		 2275 struct nfs_server *server = NFS_SERVER(inode);
2276 struct nfs_fattr fattr;
1da177e4
LT		 2277 struct nfs4_accessargs args = {
2278 .fh = NFS_FH(inode),
76b32999
TM		 2279 .bitmask = server->attr_bitmask,
2280 };
2281 struct nfs4_accessres res = {
2282 .server = server,
2283 .fattr = &fattr,
1da177e4 2284 };
1da177e4
LT		 2285 struct rpc_message msg = {
2286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2287 .rpc_argp = &args,
2288 .rpc_resp = &res,
2289 .rpc_cred = entry->cred,
2290 };
2291 int mode = entry->mask;
2292 int status;
2293
2294 /*
2295 * Determine which access bits we want to ask for...
2296 */
2297 if (mode & MAY_READ)
2298 args.access |= NFS4_ACCESS_READ;
2299 if (S_ISDIR(inode->i_mode)) {
2300 if (mode & MAY_WRITE)
2301 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2302 if (mode & MAY_EXEC)
2303 args.access |= NFS4_ACCESS_LOOKUP;
2304 } else {
2305 if (mode & MAY_WRITE)
2306 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2307 if (mode & MAY_EXEC)
2308 args.access |= NFS4_ACCESS_EXECUTE;
2309 }
76b32999 2310 nfs_fattr_init(&fattr);
cccef3b9 2311 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2312 if (!status) {
2313 entry->mask = 0;
2314 if (res.access & NFS4_ACCESS_READ)
2315 entry->mask |= MAY_READ;
2316 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2317 entry->mask |= MAY_WRITE;
2318 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2319 entry->mask |= MAY_EXEC;
76b32999 2320 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2321 }
2322 return status;
2323}
2324
2325static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2326{
2327 struct nfs4_exception exception = { };
2328 int err;
2329 do {
2330 err = nfs4_handle_exception(NFS_SERVER(inode),
2331 _nfs4_proc_access(inode, entry),
2332 &exception);
2333 } while (exception.retry);
2334 return err;
2335}
2336
2337/*
2338 * TODO: For the time being, we don't try to get any attributes
2339 * along with any of the zero-copy operations READ, READDIR,
2340 * READLINK, WRITE.
2341 *
2342 * In the case of the first three, we want to put the GETATTR
2343 * after the read-type operation -- this is because it is hard
2344 * to predict the length of a GETATTR response in v4, and thus
2345 * align the READ data correctly. This means that the GETATTR
2346 * may end up partially falling into the page cache, and we should
2347 * shift it into the 'tail' of the xdr_buf before processing.
2348 * To do this efficiently, we need to know the total length
2349 * of data received, which doesn't seem to be available outside
2350 * of the RPC layer.
2351 *
2352 * In the case of WRITE, we also want to put the GETATTR after
2353 * the operation -- in this case because we want to make sure
2354 * we get the post-operation mtime and size. This means that
2355 * we can't use xdr_encode_pages() as written: we need a variant
2356 * of it which would leave room in the 'tail' iovec.
2357 *
2358 * Both of these changes to the XDR layer would in fact be quite
2359 * minor, but I decided to leave them for a subsequent patch.
2360 */
2361static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2362 unsigned int pgbase, unsigned int pglen)
2363{
2364 struct nfs4_readlink args = {
2365 .fh = NFS_FH(inode),
2366 .pgbase = pgbase,
2367 .pglen = pglen,
2368 .pages = &page,
2369 };
f50c7000 2370 struct nfs4_readlink_res res;
1da177e4
LT		 2371 struct rpc_message msg = {
2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2373 .rpc_argp = &args,
f50c7000 2374 .rpc_resp = &res,
1da177e4
LT		 2375 };
2376
cccef3b9 2377 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2378}
2379
2380static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2381 unsigned int pgbase, unsigned int pglen)
2382{
2383 struct nfs4_exception exception = { };
2384 int err;
2385 do {
2386 err = nfs4_handle_exception(NFS_SERVER(inode),
2387 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2388 &exception);
2389 } while (exception.retry);
2390 return err;
2391}
2392
1da177e4
LT		 2393/*
2394 * Got race?
2395 * We will need to arrange for the VFS layer to provide an atomic open.
2396 * Until then, this create/open method is prone to inefficiency and race
2397 * conditions due to the lookup, create, and open VFS calls from sys_open()
2398 * placed on the wire.
2399 *
2400 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2401 * The file will be opened again in the subsequent VFS open call
2402 * (nfs4_proc_file_open).
2403 *
2404 * The open for read will just hang around to be used by any process that
2405 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2406 */
2407
2408static int
2409nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2410 int flags, struct nameidata *nd)
1da177e4 2411{
ad389da7 2412 struct path path = {
4ac91378 2413 .mnt = nd->path.mnt,
ad389da7
TM		 2414 .dentry = dentry,
2415 };
1da177e4
LT		 2416 struct nfs4_state *state;
2417 struct rpc_cred *cred;
dc0b027d 2418 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2419 int status = 0;
2420
98a8e323 2421 cred = rpc_lookup_cred();
1da177e4
LT		 2422 if (IS_ERR(cred)) {
2423 status = PTR_ERR(cred);
2424 goto out;
2425 }
dc0b027d 2426 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2427 d_drop(dentry);
1da177e4
LT		 2428 if (IS_ERR(state)) {
2429 status = PTR_ERR(state);
659bfcd6 2430 goto out_putcred;
1da177e4 2431 }
d4d9cdcb 2432 d_add(dentry, igrab(state->inode));
d75340cc 2433 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2434 if (flags & O_EXCL) {
2435 struct nfs_fattr fattr;
659bfcd6 2436 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2437 if (status == 0)
65e4308d 2438 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2439 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2440 }
ad389da7 2441 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2442 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2443 else
dc0b027d 2444 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2445out_putcred:
2446 put_rpccred(cred);
1da177e4
LT		 2447out:
2448 return status;
2449}
2450
2451static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2452{
16e42959 2453 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2454 struct nfs_removeargs args = {
1da177e4 2455 .fh = NFS_FH(dir),
4fdc17b2
TM		 2456 .name.len = name->len,
2457 .name.name = name->name,
16e42959
TM		 2458 .bitmask = server->attr_bitmask,
2459 };
4fdc17b2 2460 struct nfs_removeres res = {
16e42959 2461 .server = server,
1da177e4 2462 };
1da177e4 2463 struct rpc_message msg = {
4fdc17b2
TM		 2464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2465 .rpc_argp = &args,
2466 .rpc_resp = &res,
1da177e4
LT		 2467 };
2468 int status;
2469
4fdc17b2 2470 nfs_fattr_init(&res.dir_attr);
cccef3b9 2471 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2472 if (status == 0) {
2473 update_changeattr(dir, &res.cinfo);
4fdc17b2 2474 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2475 }
1da177e4
LT		 2476 return status;
2477}
2478
2479static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2480{
2481 struct nfs4_exception exception = { };
2482 int err;
2483 do {
2484 err = nfs4_handle_exception(NFS_SERVER(dir),
2485 _nfs4_proc_remove(dir, name),
2486 &exception);
2487 } while (exception.retry);
2488 return err;
2489}
2490
e4eff1a6 2491static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2492{
e4eff1a6
TM		 2493 struct nfs_server *server = NFS_SERVER(dir);
2494 struct nfs_removeargs *args = msg->rpc_argp;
2495 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2496
a65318bf 2497 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2498 res->server = server;
1da177e4 2499 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2500}
2501
e4eff1a6 2502static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2503{
e4eff1a6
TM		 2504 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2505
472cfbd9 2506 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2507 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2508 return 0;
472cfbd9 2509 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2510 update_changeattr(dir, &res->cinfo);
2511 nfs_post_op_update_inode(dir, &res->dir_attr);
2512 return 1;
1da177e4
LT		 2513}
2514
2515static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2516 struct inode *new_dir, struct qstr *new_name)
2517{
6caf2c82 2518 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2519 struct nfs4_rename_arg arg = {
2520 .old_dir = NFS_FH(old_dir),
2521 .new_dir = NFS_FH(new_dir),
2522 .old_name = old_name,
2523 .new_name = new_name,
6caf2c82
TM		 2524 .bitmask = server->attr_bitmask,
2525 };
2526 struct nfs_fattr old_fattr, new_fattr;
2527 struct nfs4_rename_res res = {
2528 .server = server,
2529 .old_fattr = &old_fattr,
2530 .new_fattr = &new_fattr,
1da177e4 2531 };
1da177e4
LT		 2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2534 .rpc_argp = &arg,
2535 .rpc_resp = &res,
2536 };
2537 int status;
2538
6caf2c82
TM		 2539 nfs_fattr_init(res.old_fattr);
2540 nfs_fattr_init(res.new_fattr);
cccef3b9 2541 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2542
2543 if (!status) {
2544 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2545 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2546 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2547 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2548 }
2549 return status;
2550}
2551
2552static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2553 struct inode *new_dir, struct qstr *new_name)
2554{
2555 struct nfs4_exception exception = { };
2556 int err;
2557 do {
2558 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2559 _nfs4_proc_rename(old_dir, old_name,
2560 new_dir, new_name),
2561 &exception);
2562 } while (exception.retry);
2563 return err;
2564}
2565
2566static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2567{
91ba2eee 2568 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2569 struct nfs4_link_arg arg = {
2570 .fh = NFS_FH(inode),
2571 .dir_fh = NFS_FH(dir),
2572 .name = name,
91ba2eee
TM		 2573 .bitmask = server->attr_bitmask,
2574 };
2575 struct nfs_fattr fattr, dir_attr;
2576 struct nfs4_link_res res = {
2577 .server = server,
2578 .fattr = &fattr,
2579 .dir_attr = &dir_attr,
1da177e4 2580 };
1da177e4
LT		 2581 struct rpc_message msg = {
2582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2583 .rpc_argp = &arg,
91ba2eee 2584 .rpc_resp = &res,
1da177e4
LT		 2585 };
2586 int status;
2587
91ba2eee
TM		 2588 nfs_fattr_init(res.fattr);
2589 nfs_fattr_init(res.dir_attr);
cccef3b9 2590 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2591 if (!status) {
2592 update_changeattr(dir, &res.cinfo);
2593 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2594 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2595 }
1da177e4
LT		 2596
2597 return status;
2598}
2599
2600static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2601{
2602 struct nfs4_exception exception = { };
2603 int err;
2604 do {
2605 err = nfs4_handle_exception(NFS_SERVER(inode),
2606 _nfs4_proc_link(inode, dir, name),
2607 &exception);
2608 } while (exception.retry);
2609 return err;
2610}
2611
57dc9a57
TM		 2612struct nfs4_createdata {
2613 struct rpc_message msg;
2614 struct nfs4_create_arg arg;
2615 struct nfs4_create_res res;
2616 struct nfs_fh fh;
2617 struct nfs_fattr fattr;
2618 struct nfs_fattr dir_fattr;
2619};
2620
2621static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2622 struct qstr *name, struct iattr *sattr, u32 ftype)
2623{
2624 struct nfs4_createdata *data;
2625
2626 data = kzalloc(sizeof(*data), GFP_KERNEL);
2627 if (data != NULL) {
2628 struct nfs_server *server = NFS_SERVER(dir);
2629
2630 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2631 data->msg.rpc_argp = &data->arg;
2632 data->msg.rpc_resp = &data->res;
2633 data->arg.dir_fh = NFS_FH(dir);
2634 data->arg.server = server;
2635 data->arg.name = name;
2636 data->arg.attrs = sattr;
2637 data->arg.ftype = ftype;
2638 data->arg.bitmask = server->attr_bitmask;
2639 data->res.server = server;
2640 data->res.fh = &data->fh;
2641 data->res.fattr = &data->fattr;
2642 data->res.dir_fattr = &data->dir_fattr;
2643 nfs_fattr_init(data->res.fattr);
2644 nfs_fattr_init(data->res.dir_fattr);
2645 }
2646 return data;
2647}
2648
2649static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2650{
cccef3b9
AA		 2651 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2652 &data->arg, &data->res, 1);
57dc9a57
TM		 2653 if (status == 0) {
2654 update_changeattr(dir, &data->res.dir_cinfo);
2655 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2656 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2657 }
2658 return status;
2659}
2660
2661static void nfs4_free_createdata(struct nfs4_createdata *data)
2662{
2663 kfree(data);
2664}
2665
4f390c15 2666static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2667 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2668{
57dc9a57
TM		 2669 struct nfs4_createdata *data;
2670 int status = -ENAMETOOLONG;
1da177e4 2671
94a6d753 2672 if (len > NFS4_MAXPATHLEN)
57dc9a57 2673 goto out;
4f390c15 2674
57dc9a57
TM		 2675 status = -ENOMEM;
2676 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2677 if (data == NULL)
2678 goto out;
2679
2680 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2681 data->arg.u.symlink.pages = &page;
2682 data->arg.u.symlink.len = len;
1da177e4 2683
57dc9a57
TM		 2684 status = nfs4_do_create(dir, dentry, data);
2685
2686 nfs4_free_createdata(data);
2687out:
1da177e4
LT		 2688 return status;
2689}
2690
4f390c15 2691static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2692 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2693{
2694 struct nfs4_exception exception = { };
2695 int err;
2696 do {
2697 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2698 _nfs4_proc_symlink(dir, dentry, page,
2699 len, sattr),
1da177e4
LT		 2700 &exception);
2701 } while (exception.retry);
2702 return err;
2703}
2704
2705static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2706 struct iattr *sattr)
2707{
57dc9a57
TM		 2708 struct nfs4_createdata *data;
2709 int status = -ENOMEM;
1da177e4 2710
57dc9a57
TM		 2711 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2712 if (data == NULL)
2713 goto out;
2714
2715 status = nfs4_do_create(dir, dentry, data);
2716
2717 nfs4_free_createdata(data);
2718out:
1da177e4
LT		 2719 return status;
2720}
2721
2722static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2723 struct iattr *sattr)
2724{
2725 struct nfs4_exception exception = { };
2726 int err;
2727 do {
2728 err = nfs4_handle_exception(NFS_SERVER(dir),
2729 _nfs4_proc_mkdir(dir, dentry, sattr),
2730 &exception);
2731 } while (exception.retry);
2732 return err;
2733}
2734
2735static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2736 u64 cookie, struct page *page, unsigned int count, int plus)
2737{
2738 struct inode *dir = dentry->d_inode;
2739 struct nfs4_readdir_arg args = {
2740 .fh = NFS_FH(dir),
2741 .pages = &page,
2742 .pgbase = 0,
2743 .count = count,
a65318bf 2744 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2745 };
2746 struct nfs4_readdir_res res;
2747 struct rpc_message msg = {
2748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2749 .rpc_argp = &args,
2750 .rpc_resp = &res,
2751 .rpc_cred = cred,
2752 };
2753 int status;
2754
3110ff80 2755 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2756 dentry->d_parent->d_name.name,
2757 dentry->d_name.name,
2758 (unsigned long long)cookie);
1da177e4
LT		 2759 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2760 res.pgbase = args.pgbase;
cccef3b9 2761 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2762 if (status == 0)
2763 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2764
2765 nfs_invalidate_atime(dir);
2766
3110ff80 2767 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2768 return status;
2769}
2770
2771static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2772 u64 cookie, struct page *page, unsigned int count, int plus)
2773{
2774 struct nfs4_exception exception = { };
2775 int err;
2776 do {
2777 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2778 _nfs4_proc_readdir(dentry, cred, cookie,
2779 page, count, plus),
2780 &exception);
2781 } while (exception.retry);
2782 return err;
2783}
2784
2785static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2786 struct iattr *sattr, dev_t rdev)
2787{
57dc9a57
TM		 2788 struct nfs4_createdata *data;
2789 int mode = sattr->ia_mode;
2790 int status = -ENOMEM;
1da177e4
LT		 2791
2792 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2793 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2794
2795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2796 if (data == NULL)
2797 goto out;
2798
1da177e4 2799 if (S_ISFIFO(mode))
57dc9a57 2800 data->arg.ftype = NF4FIFO;
1da177e4 2801 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2802 data->arg.ftype = NF4BLK;
2803 data->arg.u.device.specdata1 = MAJOR(rdev);
2804 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2805 }
2806 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2807 data->arg.ftype = NF4CHR;
2808 data->arg.u.device.specdata1 = MAJOR(rdev);
2809 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2810 }
1da177e4 2811
57dc9a57
TM		 2812 status = nfs4_do_create(dir, dentry, data);
2813
2814 nfs4_free_createdata(data);
2815out:
1da177e4
LT		 2816 return status;
2817}
2818
2819static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2820 struct iattr *sattr, dev_t rdev)
2821{
2822 struct nfs4_exception exception = { };
2823 int err;
2824 do {
2825 err = nfs4_handle_exception(NFS_SERVER(dir),
2826 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2827 &exception);
2828 } while (exception.retry);
2829 return err;
2830}
2831
2832static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2833 struct nfs_fsstat *fsstat)
2834{
2835 struct nfs4_statfs_arg args = {
2836 .fh = fhandle,
2837 .bitmask = server->attr_bitmask,
2838 };
24ad148a
BH		 2839 struct nfs4_statfs_res res = {
2840 .fsstat = fsstat,
2841 };
1da177e4
LT		 2842 struct rpc_message msg = {
2843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2844 .rpc_argp = &args,
24ad148a 2845 .rpc_resp = &res,
1da177e4
LT		 2846 };
2847
0e574af1 2848 nfs_fattr_init(fsstat->fattr);
cccef3b9 2849 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2850}
2851
2852static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2853{
2854 struct nfs4_exception exception = { };
2855 int err;
2856 do {
2857 err = nfs4_handle_exception(server,
2858 _nfs4_proc_statfs(server, fhandle, fsstat),
2859 &exception);
2860 } while (exception.retry);
2861 return err;
2862}
2863
2864static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2865 struct nfs_fsinfo *fsinfo)
2866{
2867 struct nfs4_fsinfo_arg args = {
2868 .fh = fhandle,
2869 .bitmask = server->attr_bitmask,
2870 };
3dda5e43
BH		 2871 struct nfs4_fsinfo_res res = {
2872 .fsinfo = fsinfo,
2873 };
1da177e4
LT		 2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2876 .rpc_argp = &args,
3dda5e43 2877 .rpc_resp = &res,
1da177e4
LT		 2878 };
2879
cccef3b9 2880 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2881}
2882
2883static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2884{
2885 struct nfs4_exception exception = { };
2886 int err;
2887
2888 do {
2889 err = nfs4_handle_exception(server,
2890 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2891 &exception);
2892 } while (exception.retry);
2893 return err;
2894}
2895
2896static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2897{
0e574af1 2898 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2899 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2900}
2901
2902static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2903 struct nfs_pathconf *pathconf)
2904{
2905 struct nfs4_pathconf_arg args = {
2906 .fh = fhandle,
2907 .bitmask = server->attr_bitmask,
2908 };
d45b2989
BH		 2909 struct nfs4_pathconf_res res = {
2910 .pathconf = pathconf,
2911 };
1da177e4
LT		 2912 struct rpc_message msg = {
2913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2914 .rpc_argp = &args,
d45b2989 2915 .rpc_resp = &res,
1da177e4
LT		 2916 };
2917
2918 /* None of the pathconf attributes are mandatory to implement */
2919 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2920 memset(pathconf, 0, sizeof(*pathconf));
2921 return 0;
2922 }
2923
0e574af1 2924 nfs_fattr_init(pathconf->fattr);
cccef3b9 2925 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2926}
2927
2928static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2929 struct nfs_pathconf *pathconf)
2930{
2931 struct nfs4_exception exception = { };
2932 int err;
2933
2934 do {
2935 err = nfs4_handle_exception(server,
2936 _nfs4_proc_pathconf(server, fhandle, pathconf),
2937 &exception);
2938 } while (exception.retry);
2939 return err;
2940}
2941
ec06c096 2942static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2943{
ec06c096 2944 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2945
f11c88af
AA		 2946 dprintk("--> %s\n", __func__);
2947
2948 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2949 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2950
9e33bed5 2951 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2952 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2953 return -EAGAIN;
1da177e4 2954 }
8850df99
TM		 2955
2956 nfs_invalidate_atime(data->inode);
1da177e4 2957 if (task->tk_status > 0)
ec06c096
TM		 2958 renew_lease(server, data->timestamp);
2959 return 0;
1da177e4
LT		 2960}
2961
bdc7f021 2962static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2963{
1da177e4 2964 data->timestamp = jiffies;
bdc7f021 2965 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2966}
2967
788e7a89 2968static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2969{
1da177e4
LT		 2970 struct inode *inode = data->inode;
2971
def6ed7e
AA		 2972 /* slot is freed in nfs_writeback_done */
2973 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2974 task->tk_status);
2975
9e33bed5 2976 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2977 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2978 return -EAGAIN;
1da177e4 2979 }
4f9838c7 2980 if (task->tk_status >= 0) {
1da177e4 2981 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2982 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2983 }
788e7a89 2984 return 0;
1da177e4
LT		 2985}
2986
bdc7f021 2987static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2988{
bdc7f021
TM		 2989 struct nfs_server *server = NFS_SERVER(data->inode);
2990
a65318bf 2991 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2992 data->res.server = server;
1da177e4
LT		 2993 data->timestamp = jiffies;
2994
bdc7f021 2995 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2996}
2997
788e7a89 2998static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2999{
1da177e4
LT		 3000 struct inode *inode = data->inode;
3001
21d9a851
AA		 3002 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3003 task->tk_status);
9e33bed5 3004 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3005 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3006 return -EAGAIN;
1da177e4 3007 }
21d9a851
AA		 3008 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3009 &data->res.seq_res);
9e08a3c5 3010 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3011 return 0;
1da177e4
LT		 3012}
3013
bdc7f021 3014static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3015{
788e7a89 3016 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3017
a65318bf 3018 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3019 data->res.server = server;
bdc7f021 3020 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3021}
3022
3023/*
3024 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3025 * standalone procedure for queueing an asynchronous RENEW.
3026 */
963d8fe5 3027static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3028{
adfa6f98 3029 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3030 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3031
3032 if (task->tk_status < 0) {
95baa25c
TM		 3033 /* Unless we're shutting down, schedule state recovery! */
3034 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3035 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3036 return;
3037 }
3038 spin_lock(&clp->cl_lock);
3039 if (time_before(clp->cl_last_renewal,timestamp))
3040 clp->cl_last_renewal = timestamp;
3041 spin_unlock(&clp->cl_lock);
29fba38b
BH		 3042 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3043 task->tk_msg.rpc_cred);
3044 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT		 3045}
3046
963d8fe5
TM		 3047static const struct rpc_call_ops nfs4_renew_ops = {
3048 .rpc_call_done = nfs4_renew_done,
3049};
3050
adfa6f98 3051int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3052{
3053 struct rpc_message msg = {
3054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3055 .rpc_argp = clp,
b4454fe1 3056 .rpc_cred = cred,
1da177e4
LT		 3057 };
3058
3059 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3060 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3061}
3062
adfa6f98 3063int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3064{
3065 struct rpc_message msg = {
3066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3067 .rpc_argp = clp,
b4454fe1 3068 .rpc_cred = cred,
1da177e4
LT		 3069 };
3070 unsigned long now = jiffies;
3071 int status;
3072
3073 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3074 if (status < 0)
3075 return status;
3076 spin_lock(&clp->cl_lock);
3077 if (time_before(clp->cl_last_renewal,now))
3078 clp->cl_last_renewal = now;
3079 spin_unlock(&clp->cl_lock);
3080 return 0;
3081}
3082
aa1870af
BF		 3083static inline int nfs4_server_supports_acls(struct nfs_server *server)
3084{
3085 return (server->caps & NFS_CAP_ACLS)
3086 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3087 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3088}
3089
3090/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3091 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3092 * the stack.
3093 */
3094#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3095
3096static void buf_to_pages(const void *buf, size_t buflen,
3097 struct page **pages, unsigned int *pgbase)
3098{
3099 const void *p = buf;
3100
3101 *pgbase = offset_in_page(buf);
3102 p -= *pgbase;
3103 while (p < buf + buflen) {
3104 *(pages++) = virt_to_page(p);
3105 p += PAGE_CACHE_SIZE;
3106 }
3107}
3108
e50a1c2e
BF		 3109struct nfs4_cached_acl {
3110 int cached;
3111 size_t len;
3e9d4154 3112 char data[0];
e50a1c2e
BF		 3113};
3114
3115static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3116{
3117 struct nfs_inode *nfsi = NFS_I(inode);
3118
3119 spin_lock(&inode->i_lock);
3120 kfree(nfsi->nfs4_acl);
3121 nfsi->nfs4_acl = acl;
3122 spin_unlock(&inode->i_lock);
3123}
3124
3125static void nfs4_zap_acl_attr(struct inode *inode)
3126{
3127 nfs4_set_cached_acl(inode, NULL);
3128}
3129
3130static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3131{
3132 struct nfs_inode *nfsi = NFS_I(inode);
3133 struct nfs4_cached_acl *acl;
3134 int ret = -ENOENT;
3135
3136 spin_lock(&inode->i_lock);
3137 acl = nfsi->nfs4_acl;
3138 if (acl == NULL)
3139 goto out;
3140 if (buf == NULL) /* user is just asking for length */
3141 goto out_len;
3142 if (acl->cached == 0)
3143 goto out;
3144 ret = -ERANGE; /* see getxattr(2) man page */
3145 if (acl->len > buflen)
3146 goto out;
3147 memcpy(buf, acl->data, acl->len);
3148out_len:
3149 ret = acl->len;
3150out:
3151 spin_unlock(&inode->i_lock);
3152 return ret;
3153}
3154
3155static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3156{
3157 struct nfs4_cached_acl *acl;
3158
3159 if (buf && acl_len <= PAGE_SIZE) {
3160 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3161 if (acl == NULL)
3162 goto out;
3163 acl->cached = 1;
3164 memcpy(acl->data, buf, acl_len);
3165 } else {
3166 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3167 if (acl == NULL)
3168 goto out;
3169 acl->cached = 0;
3170 }
3171 acl->len = acl_len;
3172out:
3173 nfs4_set_cached_acl(inode, acl);
3174}
3175
16b4289c 3176static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3177{
aa1870af
BF		 3178 struct page *pages[NFS4ACL_MAXPAGES];
3179 struct nfs_getaclargs args = {
3180 .fh = NFS_FH(inode),
3181 .acl_pages = pages,
3182 .acl_len = buflen,
3183 };
663c79b3
BH		 3184 struct nfs_getaclres res = {
3185 .acl_len = buflen,
3186 };
e50a1c2e 3187 void *resp_buf;
aa1870af
BF		 3188 struct rpc_message msg = {
3189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3190 .rpc_argp = &args,
663c79b3 3191 .rpc_resp = &res,
aa1870af 3192 };
e50a1c2e 3193 struct page *localpage = NULL;
aa1870af
BF		 3194 int ret;
3195
e50a1c2e
BF		 3196 if (buflen < PAGE_SIZE) {
3197 /* As long as we're doing a round trip to the server anyway,
3198 * let's be prepared for a page of acl data. */
3199 localpage = alloc_page(GFP_KERNEL);
3200 resp_buf = page_address(localpage);
3201 if (localpage == NULL)
3202 return -ENOMEM;
3203 args.acl_pages[0] = localpage;
3204 args.acl_pgbase = 0;
663c79b3 3205 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3206 } else {
3207 resp_buf = buf;
3208 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3209 }
cccef3b9 3210 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3211 if (ret)
3212 goto out_free;
663c79b3
BH		 3213 if (res.acl_len > args.acl_len)
3214 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3215 else
663c79b3 3216 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3217 if (buf) {
3218 ret = -ERANGE;
663c79b3 3219 if (res.acl_len > buflen)
e50a1c2e
BF		 3220 goto out_free;
3221 if (localpage)
663c79b3 3222 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3223 }
663c79b3 3224 ret = res.acl_len;
e50a1c2e
BF		 3225out_free:
3226 if (localpage)
3227 __free_page(localpage);
aa1870af
BF		 3228 return ret;
3229}
3230
16b4289c
TM		 3231static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3232{
3233 struct nfs4_exception exception = { };
3234 ssize_t ret;
3235 do {
3236 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3237 if (ret >= 0)
3238 break;
3239 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3240 } while (exception.retry);
3241 return ret;
3242}
3243
e50a1c2e
BF		 3244static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3245{
3246 struct nfs_server *server = NFS_SERVER(inode);
3247 int ret;
3248
3249 if (!nfs4_server_supports_acls(server))
3250 return -EOPNOTSUPP;
3251 ret = nfs_revalidate_inode(server, inode);
3252 if (ret < 0)
3253 return ret;
3254 ret = nfs4_read_cached_acl(inode, buf, buflen);
3255 if (ret != -ENOENT)
3256 return ret;
3257 return nfs4_get_acl_uncached(inode, buf, buflen);
3258}
3259
16b4289c 3260static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3261{
3262 struct nfs_server *server = NFS_SERVER(inode);
3263 struct page *pages[NFS4ACL_MAXPAGES];
3264 struct nfs_setaclargs arg = {
3265 .fh = NFS_FH(inode),
3266 .acl_pages = pages,
3267 .acl_len = buflen,
3268 };
73c403a9 3269 struct nfs_setaclres res;
4b580ee3
BF		 3270 struct rpc_message msg = {
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3272 .rpc_argp = &arg,
73c403a9 3273 .rpc_resp = &res,
4b580ee3
BF		 3274 };
3275 int ret;
3276
3277 if (!nfs4_server_supports_acls(server))
3278 return -EOPNOTSUPP;
642ac549 3279 nfs_inode_return_delegation(inode);
4b580ee3 3280 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3281 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3282 nfs_access_zap_cache(inode);
3283 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3284 return ret;
3285}
3286
16b4289c
TM		 3287static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3288{
3289 struct nfs4_exception exception = { };
3290 int err;
3291 do {
3292 err = nfs4_handle_exception(NFS_SERVER(inode),
3293 __nfs4_proc_set_acl(inode, buf, buflen),
3294 &exception);
3295 } while (exception.retry);
3296 return err;
3297}
3298
1da177e4 3299static int
8328d59f 3300_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3301{
1da177e4
LT		 3302 if (!clp || task->tk_status >= 0)
3303 return 0;
3304 switch(task->tk_status) {
9e33bed5
TM		 3305 case -NFS4ERR_ADMIN_REVOKED:
3306 case -NFS4ERR_BAD_STATEID:
3307 case -NFS4ERR_OPENMODE:
3308 if (state == NULL)
3309 break;
3310 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3311 case -NFS4ERR_STALE_CLIENTID:
3312 case -NFS4ERR_STALE_STATEID:
3313 case -NFS4ERR_EXPIRED:
5d00837b 3314 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3315 nfs4_schedule_state_recovery(clp);
e005e804 3316 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3317 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3318 task->tk_status = 0;
3319 return -EAGAIN;
4745e315
AA		 3320#if defined(CONFIG_NFS_V4_1)
3321 case -NFS4ERR_BADSESSION:
3322 case -NFS4ERR_BADSLOT:
3323 case -NFS4ERR_BAD_HIGH_SLOT:
3324 case -NFS4ERR_DEADSESSION:
3325 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3326 case -NFS4ERR_SEQ_FALSE_RETRY:
3327 case -NFS4ERR_SEQ_MISORDERED:
3328 dprintk("%s ERROR %d, Reset session\n", __func__,
3329 task->tk_status);
3330 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3331 task->tk_status = 0;
3332 return -EAGAIN;
3333#endif /* CONFIG_NFS_V4_1 */
1da177e4 3334 case -NFS4ERR_DELAY:
8328d59f
AA		 3335 if (server)
3336 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3337 case -NFS4ERR_GRACE:
1da177e4
LT		 3338 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3339 task->tk_status = 0;
3340 return -EAGAIN;
3341 case -NFS4ERR_OLD_STATEID:
3342 task->tk_status = 0;
3343 return -EAGAIN;
3344 }
3345 task->tk_status = nfs4_map_errors(task->tk_status);
3346 return 0;
3347}
3348
8328d59f
AA		 3349static int
3350nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3351{
3352 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3353}
3354
adfa6f98 3355int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3356{
3357 nfs4_verifier sc_verifier;
3358 struct nfs4_setclientid setclientid = {
3359 .sc_verifier = &sc_verifier,
3360 .sc_prog = program,
3361 };
3362 struct rpc_message msg = {
3363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3364 .rpc_argp = &setclientid,
3365 .rpc_resp = clp,
286d7d6a 3366 .rpc_cred = cred,
1da177e4 3367 };
bc4785cd 3368 __be32 *p;
1da177e4
LT		 3369 int loop = 0;
3370 int status;
3371
bc4785cd 3372 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3373 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3374 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3375
3376 for(;;) {
3377 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3378 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3379 clp->cl_ipaddr,
3380 rpc_peeraddr2str(clp->cl_rpcclient,
3381 RPC_DISPLAY_ADDR),
69dd716c
TM		 3382 rpc_peeraddr2str(clp->cl_rpcclient,
3383 RPC_DISPLAY_PROTO),
78ea323b 3384 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3385 clp->cl_id_uniquifier);
3386 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3387 sizeof(setclientid.sc_netid),
3388 rpc_peeraddr2str(clp->cl_rpcclient,
3389 RPC_DISPLAY_NETID));
1da177e4 3390 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3391 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3392 clp->cl_ipaddr, port >> 8, port & 255);
3393
3394 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3395 if (status != -NFS4ERR_CLID_INUSE)
3396 break;
3397 if (signalled())
3398 break;
3399 if (loop++ & 1)
3400 ssleep(clp->cl_lease_time + 1);
3401 else
3402 if (++clp->cl_id_uniquifier == 0)
3403 break;
3404 }
3405 return status;
3406}
3407
adfa6f98 3408static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3409{
3410 struct nfs_fsinfo fsinfo;
3411 struct rpc_message msg = {
3412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3413 .rpc_argp = clp,
3414 .rpc_resp = &fsinfo,
286d7d6a 3415 .rpc_cred = cred,
1da177e4
LT		 3416 };
3417 unsigned long now;
3418 int status;
3419
3420 now = jiffies;
3421 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3422 if (status == 0) {
3423 spin_lock(&clp->cl_lock);
3424 clp->cl_lease_time = fsinfo.lease_time * HZ;
3425 clp->cl_last_renewal = now;
3426 spin_unlock(&clp->cl_lock);
3427 }
3428 return status;
3429}
3430
adfa6f98 3431int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3432{
77e03677 3433 long timeout = 0;
51581f3b
TM		 3434 int err;
3435 do {
3436 err = _nfs4_proc_setclientid_confirm(clp, cred);
3437 switch (err) {
3438 case 0:
3439 return err;
3440 case -NFS4ERR_RESOURCE:
3441 /* The IBM lawyers misread another document! */
3442 case -NFS4ERR_DELAY:
3443 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3444 }
3445 } while (err == 0);
3446 return err;
3447}
3448
fe650407
TM		 3449struct nfs4_delegreturndata {
3450 struct nfs4_delegreturnargs args;
fa178f29 3451 struct nfs4_delegreturnres res;
fe650407
TM		 3452 struct nfs_fh fh;
3453 nfs4_stateid stateid;
26e976a8 3454 unsigned long timestamp;
fa178f29 3455 struct nfs_fattr fattr;
fe650407
TM		 3456 int rpc_status;
3457};
3458
fe650407
TM		 3459static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3460{
3461 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3462
3463 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3464 task->tk_status);
3465
fe650407 3466 data->rpc_status = task->tk_status;
26e976a8 3467 if (data->rpc_status == 0)
fa178f29 3468 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3469}
3470
3471static void nfs4_delegreturn_release(void *calldata)
3472{
fe650407
TM		 3473 kfree(calldata);
3474}
3475
938e1010
AA		 3476#if defined(CONFIG_NFS_V4_1)
3477static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3478{
3479 struct nfs4_delegreturndata *d_data;
3480
3481 d_data = (struct nfs4_delegreturndata *)data;
3482
3483 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3484 &d_data->args.seq_args,
3485 &d_data->res.seq_res, 1, task))
3486 return;
3487 rpc_call_start(task);
3488}
3489#endif /* CONFIG_NFS_V4_1 */
3490
c8d149f3 3491static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3492#if defined(CONFIG_NFS_V4_1)
3493 .rpc_call_prepare = nfs4_delegreturn_prepare,
3494#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3495 .rpc_call_done = nfs4_delegreturn_done,
3496 .rpc_release = nfs4_delegreturn_release,
3497};
3498
e6f81075 3499static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3500{
3501 struct nfs4_delegreturndata *data;
fa178f29 3502 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3503 struct rpc_task *task;
5138fde0
TM		 3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3506 .rpc_cred = cred,
3507 };
c970aa85
TM		 3508 struct rpc_task_setup task_setup_data = {
3509 .rpc_client = server->client,
5138fde0 3510 .rpc_message = &msg,
c970aa85
TM		 3511 .callback_ops = &nfs4_delegreturn_ops,
3512 .flags = RPC_TASK_ASYNC,
3513 };
e6f81075 3514 int status = 0;
fe650407 3515
938e1010 3516 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3517 if (data == NULL)
3518 return -ENOMEM;
3519 data->args.fhandle = &data->fh;
3520 data->args.stateid = &data->stateid;
fa178f29 3521 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3522 nfs_copy_fh(&data->fh, NFS_FH(inode));
3523 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3524 data->res.fattr = &data->fattr;
3525 data->res.server = server;
5f7dbd5c 3526 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3527 nfs_fattr_init(data->res.fattr);
26e976a8 3528 data->timestamp = jiffies;
fe650407
TM		 3529 data->rpc_status = 0;
3530
c970aa85 3531 task_setup_data.callback_data = data;
5138fde0
TM		 3532 msg.rpc_argp = &data->args,
3533 msg.rpc_resp = &data->res,
c970aa85 3534 task = rpc_run_task(&task_setup_data);
7a1218a2 3535 if (IS_ERR(task))
fe650407 3536 return PTR_ERR(task);
e6f81075
TM		 3537 if (!issync)
3538 goto out;
fe650407 3539 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3540 if (status != 0)
3541 goto out;
3542 status = data->rpc_status;
3543 if (status != 0)
3544 goto out;
3545 nfs_refresh_inode(inode, &data->fattr);
3546out:
e6b3c4db 3547 rpc_put_task(task);
fe650407 3548 return status;
1da177e4
LT		 3549}
3550
e6f81075 3551int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3552{
3553 struct nfs_server *server = NFS_SERVER(inode);
3554 struct nfs4_exception exception = { };
3555 int err;
3556 do {
e6f81075 3557 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3558 switch (err) {
3559 case -NFS4ERR_STALE_STATEID:
3560 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3561 case 0:
3562 return 0;
3563 }
3564 err = nfs4_handle_exception(server, err, &exception);
3565 } while (exception.retry);
3566 return err;
3567}
3568
3569#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3570#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3571
3572/*
3573 * sleep, with exponential backoff, and retry the LOCK operation.
3574 */
3575static unsigned long
3576nfs4_set_lock_task_retry(unsigned long timeout)
3577{
150030b7 3578 schedule_timeout_killable(timeout);
1da177e4
LT		 3579 timeout <<= 1;
3580 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3581 return NFS4_LOCK_MAXTIMEOUT;
3582 return timeout;
3583}
3584
1da177e4
LT		 3585static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3586{
3587 struct inode *inode = state->inode;
3588 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3589 struct nfs_client *clp = server->nfs_client;
911d1aaf 3590 struct nfs_lockt_args arg = {
1da177e4 3591 .fh = NFS_FH(inode),
911d1aaf 3592 .fl = request,
1da177e4 3593 };
911d1aaf
TM		 3594 struct nfs_lockt_res res = {
3595 .denied = request,
1da177e4
LT		 3596 };
3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3599 .rpc_argp = &arg,
3600 .rpc_resp = &res,
3601 .rpc_cred = state->owner->so_cred,
3602 };
1da177e4
LT		 3603 struct nfs4_lock_state *lsp;
3604 int status;
3605
911d1aaf 3606 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3607 status = nfs4_set_lock_state(state, request);
3608 if (status != 0)
3609 goto out;
3610 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3611 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3612 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3613 switch (status) {
3614 case 0:
3615 request->fl_type = F_UNLCK;
3616 break;
3617 case -NFS4ERR_DENIED:
3618 status = 0;
1da177e4 3619 }
70cc6487 3620 request->fl_ops->fl_release_private(request);
8d0a8a9d 3621out:
1da177e4
LT		 3622 return status;
3623}
3624
3625static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3626{
3627 struct nfs4_exception exception = { };
3628 int err;
3629
3630 do {
3631 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3632 _nfs4_proc_getlk(state, cmd, request),
3633 &exception);
3634 } while (exception.retry);
3635 return err;
3636}
3637
3638static int do_vfs_lock(struct file *file, struct file_lock *fl)
3639{
3640 int res = 0;
3641 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3642 case FL_POSIX:
3643 res = posix_lock_file_wait(file, fl);
3644 break;
3645 case FL_FLOCK:
3646 res = flock_lock_file_wait(file, fl);
3647 break;
3648 default:
3649 BUG();
3650 }
1da177e4
LT		 3651 return res;
3652}
3653
faf5f49c 3654struct nfs4_unlockdata {
911d1aaf
TM		 3655 struct nfs_locku_args arg;
3656 struct nfs_locku_res res;
faf5f49c
TM		 3657 struct nfs4_lock_state *lsp;
3658 struct nfs_open_context *ctx;
911d1aaf
TM		 3659 struct file_lock fl;
3660 const struct nfs_server *server;
26e976a8 3661 unsigned long timestamp;
faf5f49c
TM		 3662};
3663
911d1aaf
TM		 3664static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3665 struct nfs_open_context *ctx,
3666 struct nfs4_lock_state *lsp,
3667 struct nfs_seqid *seqid)
3668{
3669 struct nfs4_unlockdata *p;
3670 struct inode *inode = lsp->ls_state->inode;
3671
a893693c 3672 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3673 if (p == NULL)
3674 return NULL;
3675 p->arg.fh = NFS_FH(inode);
3676 p->arg.fl = &p->fl;
3677 p->arg.seqid = seqid;
c1d51931 3678 p->res.seqid = seqid;
5f7dbd5c 3679 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3680 p->arg.stateid = &lsp->ls_stateid;
3681 p->lsp = lsp;
3682 atomic_inc(&lsp->ls_count);
3683 /* Ensure we don't close file until we're done freeing locks! */
3684 p->ctx = get_nfs_open_context(ctx);
3685 memcpy(&p->fl, fl, sizeof(p->fl));
3686 p->server = NFS_SERVER(inode);
3687 return p;
3688}
3689
06f814a3 3690static void nfs4_locku_release_calldata(void *data)
faf5f49c 3691{
963d8fe5 3692 struct nfs4_unlockdata *calldata = data;
911d1aaf 3693 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3694 nfs4_put_lock_state(calldata->lsp);
3695 put_nfs_open_context(calldata->ctx);
3696 kfree(calldata);
faf5f49c
TM		 3697}
3698
963d8fe5 3699static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3700{
963d8fe5 3701 struct nfs4_unlockdata *calldata = data;
faf5f49c 3702
a893693c
AA		 3703 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3704 task->tk_status);
06f814a3
TM		 3705 if (RPC_ASSASSINATED(task))
3706 return;
faf5f49c
TM		 3707 switch (task->tk_status) {
3708 case 0:
3709 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3710 calldata->res.stateid.data,
faf5f49c 3711 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3712 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3713 break;
9e33bed5
TM		 3714 case -NFS4ERR_BAD_STATEID:
3715 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3716 case -NFS4ERR_STALE_STATEID:
3717 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3718 break;
3719 default:
9e33bed5 3720 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3721 nfs4_restart_rpc(task,
3722 calldata->server->nfs_client);
faf5f49c 3723 }
a893693c
AA		 3724 nfs4_sequence_free_slot(calldata->server->nfs_client,
3725 &calldata->res.seq_res);
faf5f49c
TM		 3726}
3727
4ce70ada 3728static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3729{
4ce70ada 3730 struct nfs4_unlockdata *calldata = data;
faf5f49c 3731
911d1aaf 3732 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3733 return;
3734 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3735 /* Note: exit _without_ running nfs4_locku_done */
3736 task->tk_action = NULL;
faf5f49c
TM		 3737 return;
3738 }
26e976a8 3739 calldata->timestamp = jiffies;
a893693c
AA		 3740 if (nfs4_setup_sequence(calldata->server->nfs_client,
3741 &calldata->arg.seq_args,
3742 &calldata->res.seq_res, 1, task))
3743 return;
5138fde0 3744 rpc_call_start(task);
faf5f49c
TM		 3745}
3746
963d8fe5 3747static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3748 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3749 .rpc_call_done = nfs4_locku_done,
06f814a3 3750 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3751};
3752
a5d16a4d
TM		 3753static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3754 struct nfs_open_context *ctx,
3755 struct nfs4_lock_state *lsp,
3756 struct nfs_seqid *seqid)
3757{
3758 struct nfs4_unlockdata *data;
5138fde0
TM		 3759 struct rpc_message msg = {
3760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3761 .rpc_cred = ctx->cred,
3762 };
c970aa85
TM		 3763 struct rpc_task_setup task_setup_data = {
3764 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3765 .rpc_message = &msg,
c970aa85 3766 .callback_ops = &nfs4_locku_ops,
101070ca 3767 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3768 .flags = RPC_TASK_ASYNC,
3769 };
a5d16a4d 3770
137d6aca
FF		 3771 /* Ensure this is an unlock - when canceling a lock, the
3772 * canceled lock is passed in, and it won't be an unlock.
3773 */
3774 fl->fl_type = F_UNLCK;
3775
a5d16a4d
TM		 3776 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3777 if (data == NULL) {
3778 nfs_free_seqid(seqid);
3779 return ERR_PTR(-ENOMEM);
3780 }
3781
5138fde0
TM		 3782 msg.rpc_argp = &data->arg,
3783 msg.rpc_resp = &data->res,
c970aa85
TM		 3784 task_setup_data.callback_data = data;
3785 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3786}
3787
faf5f49c
TM		 3788static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3789{
19e03c57 3790 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3791 struct nfs_seqid *seqid;
1da177e4 3792 struct nfs4_lock_state *lsp;
06f814a3
TM		 3793 struct rpc_task *task;
3794 int status = 0;
536ff0f8 3795 unsigned char fl_flags = request->fl_flags;
faf5f49c 3796
8d0a8a9d 3797 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3798 /* Unlock _before_ we do the RPC call */
3799 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3800 down_read(&nfsi->rwsem);
3801 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3802 up_read(&nfsi->rwsem);
9b073574 3803 goto out;
19e03c57
TM		 3804 }
3805 up_read(&nfsi->rwsem);
8d0a8a9d 3806 if (status != 0)
9b073574
TM		 3807 goto out;
3808 /* Is this a delegated lock? */
3809 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3810 goto out;
8d0a8a9d 3811 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3812 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3813 status = -ENOMEM;
911d1aaf 3814 if (seqid == NULL)
9b073574 3815 goto out;
cd3758e3 3816 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3817 status = PTR_ERR(task);
3818 if (IS_ERR(task))
9b073574 3819 goto out;
a5d16a4d 3820 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3821 rpc_put_task(task);
9b073574 3822out:
536ff0f8 3823 request->fl_flags = fl_flags;
1da177e4
LT		 3824 return status;
3825}
3826
a5d16a4d
TM		 3827struct nfs4_lockdata {
3828 struct nfs_lock_args arg;
3829 struct nfs_lock_res res;
3830 struct nfs4_lock_state *lsp;
3831 struct nfs_open_context *ctx;
3832 struct file_lock fl;
26e976a8 3833 unsigned long timestamp;
a5d16a4d
TM		 3834 int rpc_status;
3835 int cancelled;
66179efe 3836 struct nfs_server *server;
a5d16a4d
TM		 3837};
3838
3839static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3840 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3841{
a5d16a4d
TM		 3842 struct nfs4_lockdata *p;
3843 struct inode *inode = lsp->ls_state->inode;
1da177e4 3844 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3845
3846 p = kzalloc(sizeof(*p), GFP_KERNEL);
3847 if (p == NULL)
3848 return NULL;
3849
3850 p->arg.fh = NFS_FH(inode);
3851 p->arg.fl = &p->fl;
2f74c0a0
TM		 3852 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3853 if (p->arg.open_seqid == NULL)
3854 goto out_free;
a5d16a4d
TM		 3855 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3856 if (p->arg.lock_seqid == NULL)
2f74c0a0 3857 goto out_free_seqid;
a5d16a4d 3858 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3859 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3860 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3861 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3862 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3863 p->lsp = lsp;
66179efe 3864 p->server = server;
a5d16a4d
TM		 3865 atomic_inc(&lsp->ls_count);
3866 p->ctx = get_nfs_open_context(ctx);
3867 memcpy(&p->fl, fl, sizeof(p->fl));
3868 return p;
2f74c0a0
TM		 3869out_free_seqid:
3870 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3871out_free:
3872 kfree(p);
3873 return NULL;
3874}
3875
3876static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3877{
3878 struct nfs4_lockdata *data = calldata;
3879 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3880
3110ff80 3881 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3882 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3883 return;
a5d16a4d
TM		 3884 /* Do we need to do an open_to_lock_owner? */
3885 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3886 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3887 return;
a5d16a4d
TM		 3888 data->arg.open_stateid = &state->stateid;
3889 data->arg.new_lock_owner = 1;
c1d51931 3890 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3891 } else
3892 data->arg.new_lock_owner = 0;
26e976a8 3893 data->timestamp = jiffies;
66179efe
AA		 3894 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3895 &data->res.seq_res, 1, task))
3896 return;
5138fde0 3897 rpc_call_start(task);
3110ff80 3898 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3899}
3900
3901static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3902{
3903 struct nfs4_lockdata *data = calldata;
3904
3110ff80 3905 dprintk("%s: begin!\n", __func__);
a5d16a4d 3906
66179efe
AA		 3907 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3908 task->tk_status);
3909
a5d16a4d
TM		 3910 data->rpc_status = task->tk_status;
3911 if (RPC_ASSASSINATED(task))
3912 goto out;
3913 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3914 if (data->rpc_status == 0)
3915 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3916 else
3917 goto out;
3918 }
3919 if (data->rpc_status == 0) {
3920 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3921 sizeof(data->lsp->ls_stateid.data));
3922 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3923 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3924 }
a5d16a4d 3925out:
3110ff80 3926 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3927}
3928
3929static void nfs4_lock_release(void *calldata)
3930{
3931 struct nfs4_lockdata *data = calldata;
3932
3110ff80 3933 dprintk("%s: begin!\n", __func__);
2f74c0a0 3934 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3935 if (data->cancelled != 0) {
3936 struct rpc_task *task;
3937 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3938 data->arg.lock_seqid);
3939 if (!IS_ERR(task))
e6b3c4db 3940 rpc_put_task(task);
3110ff80 3941 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3942 } else
3943 nfs_free_seqid(data->arg.lock_seqid);
3944 nfs4_put_lock_state(data->lsp);
3945 put_nfs_open_context(data->ctx);
3946 kfree(data);
3110ff80 3947 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3948}
3949
3950static const struct rpc_call_ops nfs4_lock_ops = {
3951 .rpc_call_prepare = nfs4_lock_prepare,
3952 .rpc_call_done = nfs4_lock_done,
3953 .rpc_release = nfs4_lock_release,
3954};
3955
3956static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3957{
3958 struct nfs4_lockdata *data;
3959 struct rpc_task *task;
5138fde0
TM		 3960 struct rpc_message msg = {
3961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3962 .rpc_cred = state->owner->so_cred,
3963 };
c970aa85
TM		 3964 struct rpc_task_setup task_setup_data = {
3965 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3966 .rpc_message = &msg,
c970aa85 3967 .callback_ops = &nfs4_lock_ops,
101070ca 3968 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3969 .flags = RPC_TASK_ASYNC,
3970 };
a5d16a4d
TM		 3971 int ret;
3972
3110ff80 3973 dprintk("%s: begin!\n", __func__);
cd3758e3 3974 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3975 fl->fl_u.nfs4_fl.owner);
3976 if (data == NULL)
3977 return -ENOMEM;
3978 if (IS_SETLKW(cmd))
3979 data->arg.block = 1;
3980 if (reclaim != 0)
3981 data->arg.reclaim = 1;
5138fde0
TM		 3982 msg.rpc_argp = &data->arg,
3983 msg.rpc_resp = &data->res,
c970aa85
TM		 3984 task_setup_data.callback_data = data;
3985 task = rpc_run_task(&task_setup_data);
7a1218a2 3986 if (IS_ERR(task))
a5d16a4d 3987 return PTR_ERR(task);
a5d16a4d
TM		 3988 ret = nfs4_wait_for_completion_rpc_task(task);
3989 if (ret == 0) {
3990 ret = data->rpc_status;
a5d16a4d
TM		 3991 } else
3992 data->cancelled = 1;
e6b3c4db 3993 rpc_put_task(task);
3110ff80 3994 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3995 return ret;
1da177e4
LT		 3996}
3997
3998static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3999{
202b50dc
TM		 4000 struct nfs_server *server = NFS_SERVER(state->inode);
4001 struct nfs4_exception exception = { };
4002 int err;
4003
4004 do {
42a2d13e
TM		 4005 /* Cache the lock if possible... */
4006 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4007 return 0;
202b50dc
TM		 4008 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4009 if (err != -NFS4ERR_DELAY)
4010 break;
4011 nfs4_handle_exception(server, err, &exception);
4012 } while (exception.retry);
4013 return err;
1da177e4
LT		 4014}
4015
4016static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4017{
202b50dc
TM		 4018 struct nfs_server *server = NFS_SERVER(state->inode);
4019 struct nfs4_exception exception = { };
4020 int err;
4021
6bfc93ef
TM		 4022 err = nfs4_set_lock_state(state, request);
4023 if (err != 0)
4024 return err;
202b50dc 4025 do {
42a2d13e
TM		 4026 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4027 return 0;
202b50dc
TM		 4028 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4029 if (err != -NFS4ERR_DELAY)
4030 break;
4031 nfs4_handle_exception(server, err, &exception);
4032 } while (exception.retry);
4033 return err;
1da177e4
LT		 4034}
4035
4036static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4037{
19e03c57 4038 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4039 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4040 int status;
4041
6bfc93ef 4042 /* Is this a delegated open? */
6bfc93ef
TM		 4043 status = nfs4_set_lock_state(state, request);
4044 if (status != 0)
4045 goto out;
01c3b861
TM		 4046 request->fl_flags |= FL_ACCESS;
4047 status = do_vfs_lock(request->fl_file, request);
4048 if (status < 0)
4049 goto out;
19e03c57 4050 down_read(&nfsi->rwsem);
01c3b861 4051 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4052 /* Yes: cache locks! */
01c3b861 4053 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4054 request->fl_flags = fl_flags & ~FL_SLEEP;
4055 status = do_vfs_lock(request->fl_file, request);
4056 goto out_unlock;
01c3b861 4057 }
6bfc93ef
TM		 4058 status = _nfs4_do_setlk(state, cmd, request, 0);
4059 if (status != 0)
01c3b861 4060 goto out_unlock;
6bfc93ef 4061 /* Note: we always want to sleep here! */
01c3b861 4062 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4063 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4064 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4065out_unlock:
19e03c57 4066 up_read(&nfsi->rwsem);
01c3b861
TM		 4067out:
4068 request->fl_flags = fl_flags;
1da177e4
LT		 4069 return status;
4070}
4071
4072static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4073{
4074 struct nfs4_exception exception = { };
4075 int err;
4076
4077 do {
965b5d67
TM		 4078 err = _nfs4_proc_setlk(state, cmd, request);
4079 if (err == -NFS4ERR_DENIED)
4080 err = -EAGAIN;
1da177e4 4081 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4082 err, &exception);
1da177e4
LT		 4083 } while (exception.retry);
4084 return err;
4085}
4086
4087static int
4088nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4089{
4090 struct nfs_open_context *ctx;
4091 struct nfs4_state *state;
4092 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4093 int status;
4094
4095 /* verify open state */
cd3758e3 4096 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4097 state = ctx->state;
4098
4099 if (request->fl_start < 0 || request->fl_end < 0)
4100 return -EINVAL;
4101
d953126a
TM		 4102 if (IS_GETLK(cmd)) {
4103 if (state != NULL)
4104 return nfs4_proc_getlk(state, F_GETLK, request);
4105 return 0;
4106 }
1da177e4
LT		 4107
4108 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4109 return -EINVAL;
4110
d953126a
TM		 4111 if (request->fl_type == F_UNLCK) {
4112 if (state != NULL)
4113 return nfs4_proc_unlck(state, cmd, request);
4114 return 0;
4115 }
1da177e4 4116
d953126a
TM		 4117 if (state == NULL)
4118 return -ENOLCK;
1da177e4
LT		 4119 do {
4120 status = nfs4_proc_setlk(state, cmd, request);
4121 if ((status != -EAGAIN) || IS_SETLK(cmd))
4122 break;
4123 timeout = nfs4_set_lock_task_retry(timeout);
4124 status = -ERESTARTSYS;
4125 if (signalled())
4126 break;
4127 } while(status < 0);
1da177e4
LT		 4128 return status;
4129}
4130
888e694c
TM		 4131int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4132{
4133 struct nfs_server *server = NFS_SERVER(state->inode);
4134 struct nfs4_exception exception = { };
4135 int err;
4136
4137 err = nfs4_set_lock_state(state, fl);
4138 if (err != 0)
4139 goto out;
4140 do {
4141 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4142 switch (err) {
4143 default:
4144 printk(KERN_ERR "%s: unhandled error %d.\n",
4145 __func__, err);
4146 case 0:
965b5d67 4147 case -ESTALE:
d5122201
TM		 4148 goto out;
4149 case -NFS4ERR_EXPIRED:
4150 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4151 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4152 nfs4_schedule_state_recovery(server->nfs_client);
4153 goto out;
965b5d67
TM		 4154 case -ERESTARTSYS:
4155 /*
4156 * The show must go on: exit, but mark the
4157 * stateid as needing recovery.
4158 */
4159 case -NFS4ERR_ADMIN_REVOKED:
4160 case -NFS4ERR_BAD_STATEID:
4161 case -NFS4ERR_OPENMODE:
4162 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4163 err = 0;
4164 goto out;
4165 case -ENOMEM:
4166 case -NFS4ERR_DENIED:
4167 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4168 err = 0;
4169 goto out;
d5122201
TM		 4170 case -NFS4ERR_DELAY:
4171 break;
4172 }
888e694c
TM		 4173 err = nfs4_handle_exception(server, err, &exception);
4174 } while (exception.retry);
4175out:
4176 return err;
4177}
6b3b5496 4178
aa1870af
BF		 4179#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4180
6b3b5496
BF		 4181int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4182 size_t buflen, int flags)
4183{
4b580ee3
BF		 4184 struct inode *inode = dentry->d_inode;
4185
4186 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4187 return -EOPNOTSUPP;
4188
4b580ee3 4189 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4190}
4191
4192/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4193 * and that's what we'll do for e.g. user attributes that haven't been set.
4194 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4195 * attributes in kernel-managed attribute namespaces. */
4196ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4197 size_t buflen)
4198{
aa1870af
BF		 4199 struct inode *inode = dentry->d_inode;
4200
4201 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4202 return -EOPNOTSUPP;
4203
4204 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4205}
4206
4207ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4208{
aa1870af 4209 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4210
096455a2
BF		 4211 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4212 return 0;
6b3b5496
BF		 4213 if (buf && buflen < len)
4214 return -ERANGE;
4215 if (buf)
aa1870af
BF		 4216 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4217 return len;
6b3b5496
BF		 4218}
4219
69aaaae1
TM		 4220static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4221{
4222 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4223 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4224 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4225 return;
4226
4227 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4228 NFS_ATTR_FATTR_NLINK;
4229 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4230 fattr->nlink = 2;
4231}
4232
56659e99 4233int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4234 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4235{
4236 struct nfs_server *server = NFS_SERVER(dir);
4237 u32 bitmask[2] = {
361e624f
MN		 4238 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4239 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4240 };
4241 struct nfs4_fs_locations_arg args = {
4242 .dir_fh = NFS_FH(dir),
c228fd3a 4243 .name = name,
683b57b4
TM		 4244 .page = page,
4245 .bitmask = bitmask,
4246 };
22958463
BH		 4247 struct nfs4_fs_locations_res res = {
4248 .fs_locations = fs_locations,
4249 };
683b57b4
TM		 4250 struct rpc_message msg = {
4251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4252 .rpc_argp = &args,
22958463 4253 .rpc_resp = &res,
683b57b4
TM		 4254 };
4255 int status;
4256
3110ff80 4257 dprintk("%s: start\n", __func__);
c228fd3a 4258 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4259 fs_locations->server = server;
830b8e33 4260 fs_locations->nlocations = 0;
cccef3b9 4261 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4262 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4263 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4264 return status;
4265}
4266
557134a3 4267#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4268/*
4269 * nfs4_proc_exchange_id()
4270 *
4271 * Since the clientid has expired, all compounds using sessions
4272 * associated with the stale clientid will be returning
4273 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4274 * be in some phase of session reset.
4275 */
4276static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4277{
4278 nfs4_verifier verifier;
4279 struct nfs41_exchange_id_args args = {
4280 .client = clp,
4281 .flags = clp->cl_exchange_flags,
4282 };
4283 struct nfs41_exchange_id_res res = {
4284 .client = clp,
4285 };
4286 int status;
4287 struct rpc_message msg = {
4288 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4289 .rpc_argp = &args,
4290 .rpc_resp = &res,
4291 .rpc_cred = cred,
4292 };
4293 __be32 *p;
4294
4295 dprintk("--> %s\n", __func__);
4296 BUG_ON(clp == NULL);
a7b72103 4297
99fe60d0
BH		 4298 p = (u32 *)verifier.data;
4299 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4300 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4301 args.verifier = &verifier;
4302
4303 while (1) {
4304 args.id_len = scnprintf(args.id, sizeof(args.id),
4305 "%s/%s %u",
4306 clp->cl_ipaddr,
4307 rpc_peeraddr2str(clp->cl_rpcclient,
4308 RPC_DISPLAY_ADDR),
4309 clp->cl_id_uniquifier);
4310
4311 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4312
4313 if (status != NFS4ERR_CLID_INUSE)
4314 break;
4315
4316 if (signalled())
4317 break;
4318
4319 if (++clp->cl_id_uniquifier == 0)
4320 break;
4321 }
4322
4323 dprintk("<-- %s status= %d\n", __func__, status);
4324 return status;
4325}
4326
2050f0cc
AA		 4327struct nfs4_get_lease_time_data {
4328 struct nfs4_get_lease_time_args *args;
4329 struct nfs4_get_lease_time_res *res;
4330 struct nfs_client *clp;
4331};
4332
4333static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4334 void *calldata)
4335{
4336 int ret;
4337 struct nfs4_get_lease_time_data *data =
4338 (struct nfs4_get_lease_time_data *)calldata;
4339
4340 dprintk("--> %s\n", __func__);
4341 /* just setup sequence, do not trigger session recovery
4342 since we're invoked within one */
4343 ret = nfs41_setup_sequence(data->clp->cl_session,
4344 &data->args->la_seq_args,
4345 &data->res->lr_seq_res, 0, task);
4346
4347 BUG_ON(ret == -EAGAIN);
4348 rpc_call_start(task);
4349 dprintk("<-- %s\n", __func__);
4350}
4351
4352/*
4353 * Called from nfs4_state_manager thread for session setup, so don't recover
4354 * from sequence operation or clientid errors.
4355 */
4356static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4357{
4358 struct nfs4_get_lease_time_data *data =
4359 (struct nfs4_get_lease_time_data *)calldata;
4360
4361 dprintk("--> %s\n", __func__);
4362 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4363 switch (task->tk_status) {
4364 case -NFS4ERR_DELAY:
4365 case -NFS4ERR_GRACE:
4366 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4367 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4368 task->tk_status = 0;
eedc020e 4369 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4370 return;
4371 }
4372 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4373 dprintk("<-- %s\n", __func__);
4374}
4375
4376struct rpc_call_ops nfs4_get_lease_time_ops = {
4377 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4378 .rpc_call_done = nfs4_get_lease_time_done,
4379};
4380
4381int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4382{
4383 struct rpc_task *task;
4384 struct nfs4_get_lease_time_args args;
4385 struct nfs4_get_lease_time_res res = {
4386 .lr_fsinfo = fsinfo,
4387 };
4388 struct nfs4_get_lease_time_data data = {
4389 .args = &args,
4390 .res = &res,
4391 .clp = clp,
4392 };
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4395 .rpc_argp = &args,
4396 .rpc_resp = &res,
4397 };
4398 struct rpc_task_setup task_setup = {
4399 .rpc_client = clp->cl_rpcclient,
4400 .rpc_message = &msg,
4401 .callback_ops = &nfs4_get_lease_time_ops,
4402 .callback_data = &data
4403 };
4404 int status;
4405
4406 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4407 dprintk("--> %s\n", __func__);
4408 task = rpc_run_task(&task_setup);
4409
4410 if (IS_ERR(task))
4411 status = PTR_ERR(task);
4412 else {
4413 status = task->tk_status;
4414 rpc_put_task(task);
4415 }
4416 dprintk("<-- %s return %d\n", __func__, status);
4417
4418 return status;
4419}
4420
b73dafa7
RL		 4421/*
4422 * Reset a slot table
4423 */
4424static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4425 int old_max_slots, int ivalue)
ac72b7b3 4426{
b73dafa7 4427 int i;
ac72b7b3
AA		 4428 int ret = 0;
4429
b73dafa7 4430 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4431
b73dafa7
RL		 4432 /*
4433 * Until we have dynamic slot table adjustment, insist
4434 * upon the same slot table size
4435 */
ac72b7b3
AA		 4436 if (max_slots != old_max_slots) {
4437 dprintk("%s reset slot table does't match old\n",
4438 __func__);
4439 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4440 goto out;
4441 }
4442 spin_lock(&tbl->slot_tbl_lock);
4443 for (i = 0; i < max_slots; ++i)
b73dafa7 4444 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4445 tbl->highest_used_slotid = -1;
4446 spin_unlock(&tbl->slot_tbl_lock);
4447 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4448 tbl, tbl->slots, tbl->max_slots);
4449out:
4450 dprintk("<-- %s: return %d\n", __func__, ret);
4451 return ret;
4452}
4453
b73dafa7
RL		 4454/*
4455 * Reset the forechannel and backchannel slot tables
4456 */
4457static int nfs4_reset_slot_tables(struct nfs4_session *session)
4458{
4459 int status;
4460
4461 status = nfs4_reset_slot_table(&session->fc_slot_table,
4462 session->fc_attrs.max_reqs,
4463 session->fc_slot_table.max_slots,
4464 1);
f8625a6a
RL		 4465 if (status)
4466 return status;
4467
4468 status = nfs4_reset_slot_table(&session->bc_slot_table,
4469 session->bc_attrs.max_reqs,
4470 session->bc_slot_table.max_slots,
4471 0);
b73dafa7
RL		 4472 return status;
4473}
4474
f8625a6a
RL		 4475/* Destroy the slot table */
4476static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4477{
4478 if (session->fc_slot_table.slots != NULL) {
4479 kfree(session->fc_slot_table.slots);
4480 session->fc_slot_table.slots = NULL;
4481 }
4482 if (session->bc_slot_table.slots != NULL) {
4483 kfree(session->bc_slot_table.slots);
4484 session->bc_slot_table.slots = NULL;
4485 }
4486 return;
4487}
4488
fc931582
AA		 4489/*
4490 * Initialize slot table
4491 */
050047ce
RL		 4492static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4493 int max_slots, int ivalue)
fc931582 4494{
050047ce 4495 int i;
fc931582
AA		 4496 struct nfs4_slot *slot;
4497 int ret = -ENOMEM;
4498
4499 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4500
050047ce 4501 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4502
4503 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4504 if (!slot)
4505 goto out;
4506 for (i = 0; i < max_slots; ++i)
050047ce 4507 slot[i].seq_nr = ivalue;
fc931582
AA		 4508 ret = 0;
4509
4510 spin_lock(&tbl->slot_tbl_lock);
4511 if (tbl->slots != NULL) {
4512 spin_unlock(&tbl->slot_tbl_lock);
4513 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4514 __func__, tbl, tbl->slots);
4515 WARN_ON(1);
4516 goto out_free;
4517 }
4518 tbl->max_slots = max_slots;
4519 tbl->slots = slot;
4520 tbl->highest_used_slotid = -1; /* no slot is currently used */
4521 spin_unlock(&tbl->slot_tbl_lock);
4522 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4523 tbl, tbl->slots, tbl->max_slots);
4524out:
4525 dprintk("<-- %s: return %d\n", __func__, ret);
4526 return ret;
050047ce 4527
fc931582
AA		 4528out_free:
4529 kfree(slot);
4530 goto out;
4531}
4532
050047ce
RL		 4533/*
4534 * Initialize the forechannel and backchannel tables
4535 */
4536static int nfs4_init_slot_tables(struct nfs4_session *session)
4537{
4538 int status;
4539
4540 status = nfs4_init_slot_table(&session->fc_slot_table,
4541 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4542 if (status)
4543 return status;
050047ce 4544
f8625a6a
RL		 4545 status = nfs4_init_slot_table(&session->bc_slot_table,
4546 session->bc_attrs.max_reqs, 0);
4547 if (status)
4548 nfs4_destroy_slot_tables(session);
4549
4550 return status;
557134a3
AA		 4551}
4552
4553struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4554{
4555 struct nfs4_session *session;
4556 struct nfs4_slot_table *tbl;
4557
4558 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4559 if (!session)
4560 return NULL;
76db6d95
AA		 4561
4562 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4563 /*
4564 * The create session reply races with the server back
4565 * channel probe. Mark the client NFS_CS_SESSION_INITING
4566 * so that the client back channel can find the
4567 * nfs_client struct
4568 */
4569 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4570
557134a3
AA		 4571 tbl = &session->fc_slot_table;
4572 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4573 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4574
4575 tbl = &session->bc_slot_table;
4576 spin_lock_init(&tbl->slot_tbl_lock);
4577 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4578
557134a3
AA		 4579 session->clp = clp;
4580 return session;
4581}
4582
4583void nfs4_destroy_session(struct nfs4_session *session)
4584{
5a0ffe54
AA		 4585 nfs4_proc_destroy_session(session);
4586 dprintk("%s Destroy backchannel for xprt %p\n",
4587 __func__, session->clp->cl_rpcclient->cl_xprt);
4588 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4589 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4590 nfs4_destroy_slot_tables(session);
557134a3
AA		 4591 kfree(session);
4592}
4593
fc931582
AA		 4594/*
4595 * Initialize the values to be used by the client in CREATE_SESSION
4596 * If nfs4_init_session set the fore channel request and response sizes,
4597 * use them.
4598 *
4599 * Set the back channel max_resp_sz_cached to zero to force the client to
4600 * always set csa_cachethis to FALSE because the current implementation
4601 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4602 */
4603static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4604{
4605 struct nfs4_session *session = args->client->cl_session;
4606 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4607 mxresp_sz = session->fc_attrs.max_resp_sz;
4608
4609 if (mxrqst_sz == 0)
4610 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4611 if (mxresp_sz == 0)
4612 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4613 /* Fore channel attributes */
4614 args->fc_attrs.headerpadsz = 0;
4615 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4616 args->fc_attrs.max_resp_sz = mxresp_sz;
4617 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4618 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4619 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4620
4621 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4622 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4623 __func__,
4624 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4625 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4626 args->fc_attrs.max_reqs);
4627
4628 /* Back channel attributes */
4629 args->bc_attrs.headerpadsz = 0;
4630 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4631 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4632 args->bc_attrs.max_resp_sz_cached = 0;
4633 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4634 args->bc_attrs.max_reqs = 1;
4635
4636 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4637 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4638 __func__,
4639 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4640 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4641 args->bc_attrs.max_reqs);
4642}
4643
8d35301d
AA		 4644static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4645{
4646 if (rcvd <= sent)
4647 return 0;
4648 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4649 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4650 return -EINVAL;
4651}
4652
4653#define _verify_fore_channel_attr(_name_) \
4654 _verify_channel_attr("fore", #_name_, \
4655 args->fc_attrs._name_, \
4656 session->fc_attrs._name_)
4657
4658#define _verify_back_channel_attr(_name_) \
4659 _verify_channel_attr("back", #_name_, \
4660 args->bc_attrs._name_, \
4661 session->bc_attrs._name_)
4662
4663/*
4664 * The server is not allowed to increase the fore channel header pad size,
4665 * maximum response size, or maximum number of operations.
4666 *
4667 * The back channel attributes are only negotiatied down: We send what the
4668 * (back channel) server insists upon.
4669 */
4670static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4671 struct nfs4_session *session)
4672{
4673 int ret = 0;
4674
4675 ret |= _verify_fore_channel_attr(headerpadsz);
4676 ret |= _verify_fore_channel_attr(max_resp_sz);
4677 ret |= _verify_fore_channel_attr(max_ops);
4678
4679 ret |= _verify_back_channel_attr(headerpadsz);
4680 ret |= _verify_back_channel_attr(max_rqst_sz);
4681 ret |= _verify_back_channel_attr(max_resp_sz);
4682 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4683 ret |= _verify_back_channel_attr(max_ops);
4684 ret |= _verify_back_channel_attr(max_reqs);
4685
4686 return ret;
4687}
4688
fc931582
AA		 4689static int _nfs4_proc_create_session(struct nfs_client *clp)
4690{
4691 struct nfs4_session *session = clp->cl_session;
4692 struct nfs41_create_session_args args = {
4693 .client = clp,
4694 .cb_program = NFS4_CALLBACK,
4695 };
4696 struct nfs41_create_session_res res = {
4697 .client = clp,
4698 };
4699 struct rpc_message msg = {
4700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4701 .rpc_argp = &args,
4702 .rpc_resp = &res,
4703 };
4704 int status;
4705
4706 nfs4_init_channel_attrs(&args);
0f91421e 4707 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4708
4709 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4710
8d35301d
AA		 4711 if (!status)
4712 /* Verify the session's negotiated channel_attrs values */
4713 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4714 if (!status) {
4715 /* Increment the clientid slot sequence id */
4716 clp->cl_seqid++;
4717 }
4718
4719 return status;
4720}
4721
4722/*
4723 * Issues a CREATE_SESSION operation to the server.
4724 * It is the responsibility of the caller to verify the session is
4725 * expired before calling this routine.
4726 */
ac72b7b3 4727int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4728{
4729 int status;
4730 unsigned *ptr;
4731 struct nfs_fsinfo fsinfo;
4732 struct nfs4_session *session = clp->cl_session;
4733
4734 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4735
4736 status = _nfs4_proc_create_session(clp);
4737 if (status)
4738 goto out;
4739
ac72b7b3
AA		 4740 /* Init or reset the fore channel */
4741 if (reset)
b73dafa7 4742 status = nfs4_reset_slot_tables(session);
ac72b7b3 4743 else
050047ce 4744 status = nfs4_init_slot_tables(session);
fc931582
AA		 4745 dprintk("fore channel slot table initialization returned %d\n", status);
4746 if (status)
4747 goto out;
4748
4749 ptr = (unsigned *)&session->sess_id.data[0];
4750 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4751 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4752
ac72b7b3
AA		 4753 if (reset)
4754 /* Lease time is aleady set */
4755 goto out;
4756
fc931582
AA		 4757 /* Get the lease time */
4758 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4759 if (status == 0) {
4760 /* Update lease time and schedule renewal */
4761 spin_lock(&clp->cl_lock);
4762 clp->cl_lease_time = fsinfo.lease_time * HZ;
4763 clp->cl_last_renewal = jiffies;
4764 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4765 spin_unlock(&clp->cl_lock);
4766
4767 nfs4_schedule_state_renewal(clp);
4768 }
4769out:
4770 dprintk("<-- %s\n", __func__);
4771 return status;
4772}
4773
0f3e66c6
AA		 4774/*
4775 * Issue the over-the-wire RPC DESTROY_SESSION.
4776 * The caller must serialize access to this routine.
4777 */
4778int nfs4_proc_destroy_session(struct nfs4_session *session)
4779{
4780 int status = 0;
4781 struct rpc_message msg;
4782
4783 dprintk("--> nfs4_proc_destroy_session\n");
4784
4785 /* session is still being setup */
4786 if (session->clp->cl_cons_state != NFS_CS_READY)
4787 return status;
4788
4789 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4790 msg.rpc_argp = session;
4791 msg.rpc_resp = NULL;
4792 msg.rpc_cred = NULL;
4793 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4794
4795 if (status)
4796 printk(KERN_WARNING
4797 "Got error %d from the server on DESTROY_SESSION. "
4798 "Session has been destroyed regardless...\n", status);
4799
4800 dprintk("<-- nfs4_proc_destroy_session\n");
4801 return status;
4802}
4803
fccba804
TM		 4804int nfs4_init_session(struct nfs_server *server)
4805{
4806 struct nfs_client *clp = server->nfs_client;
4807 int ret;
4808
4809 if (!nfs4_has_session(clp))
4810 return 0;
4811
4812 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4813 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4814 ret = nfs4_recover_expired_lease(server);
4815 if (!ret)
4816 ret = nfs4_check_client_ready(clp);
4817 return ret;
4818}
4819
fc01cea9
AA		 4820/*
4821 * Renew the cl_session lease.
4822 */
4823static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4824{
4825 struct nfs4_sequence_args args;
4826 struct nfs4_sequence_res res;
4827
4828 struct rpc_message msg = {
4829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4830 .rpc_argp = &args,
4831 .rpc_resp = &res,
4832 .rpc_cred = cred,
4833 };
4834
4835 args.sa_cache_this = 0;
4836
4837 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4838 &res, 0);
4839}
4840
4841void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4842{
4843 struct nfs_client *clp = (struct nfs_client *)data;
4844
4845 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4846
4847 if (task->tk_status < 0) {
4848 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4849
4850 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4851 == -EAGAIN) {
eedc020e 4852 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4853 return;
4854 }
4855 }
4856 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4857 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4858
4859 put_rpccred(task->tk_msg.rpc_cred);
4860 kfree(task->tk_msg.rpc_argp);
4861 kfree(task->tk_msg.rpc_resp);
4862
4863 dprintk("<-- %s\n", __func__);
4864}
4865
4866static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4867{
4868 struct nfs_client *clp;
4869 struct nfs4_sequence_args *args;
4870 struct nfs4_sequence_res *res;
4871
4872 clp = (struct nfs_client *)data;
4873 args = task->tk_msg.rpc_argp;
4874 res = task->tk_msg.rpc_resp;
4875
4876 if (nfs4_setup_sequence(clp, args, res, 0, task))
4877 return;
4878 rpc_call_start(task);
4879}
4880
4881static const struct rpc_call_ops nfs41_sequence_ops = {
4882 .rpc_call_done = nfs41_sequence_call_done,
4883 .rpc_call_prepare = nfs41_sequence_prepare,
4884};
4885
4886static int nfs41_proc_async_sequence(struct nfs_client *clp,
4887 struct rpc_cred *cred)
4888{
4889 struct nfs4_sequence_args *args;
4890 struct nfs4_sequence_res *res;
4891 struct rpc_message msg = {
4892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4893 .rpc_cred = cred,
4894 };
4895
4896 args = kzalloc(sizeof(*args), GFP_KERNEL);
4897 if (!args)
4898 return -ENOMEM;
4899 res = kzalloc(sizeof(*res), GFP_KERNEL);
4900 if (!res) {
4901 kfree(args);
4902 return -ENOMEM;
4903 }
4904 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4905 msg.rpc_argp = args;
4906 msg.rpc_resp = res;
4907
4908 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4909 &nfs41_sequence_ops, (void *)clp);
4910}
4911
557134a3
AA		 4912#endif /* CONFIG_NFS_V4_1 */
4913
591d71cb 4914struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4915 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4916 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4917 .recover_open = nfs4_open_reclaim,
4918 .recover_lock = nfs4_lock_reclaim,
591d71cb 4919 .establish_clid = nfs4_init_clientid,
90a16617 4920 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4921};
4922
591d71cb
AA		 4923#if defined(CONFIG_NFS_V4_1)
4924struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4925 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4926 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4927 .recover_open = nfs4_open_reclaim,
4928 .recover_lock = nfs4_lock_reclaim,
4929 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4930 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4931};
4932#endif /* CONFIG_NFS_V4_1 */
4933
4934struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4935 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4936 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4937 .recover_open = nfs4_open_expired,
4938 .recover_lock = nfs4_lock_expired,
4939 .establish_clid = nfs4_init_clientid,
90a16617 4940 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4941};
4942
4943#if defined(CONFIG_NFS_V4_1)
4944struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4945 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4946 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4947 .recover_open = nfs4_open_expired,
4948 .recover_lock = nfs4_lock_expired,
591d71cb 4949 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4950 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4951};
591d71cb 4952#endif /* CONFIG_NFS_V4_1 */
1da177e4 4953
29fba38b
BH		 4954struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4955 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4956 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4957 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4958};
4959
4960#if defined(CONFIG_NFS_V4_1)
4961struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4962 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4963 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4964 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4965};
4966#endif
4967
4968/*
4969 * Per minor version reboot and network partition recovery ops
4970 */
4971
591d71cb
AA		 4972struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4973 &nfs40_reboot_recovery_ops,
4974#if defined(CONFIG_NFS_V4_1)
4975 &nfs41_reboot_recovery_ops,
4976#endif
4977};
4978
4979struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4980 &nfs40_nograce_recovery_ops,
4981#if defined(CONFIG_NFS_V4_1)
4982 &nfs41_nograce_recovery_ops,
4983#endif
4984};
4985
29fba38b
BH		 4986struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4987 &nfs40_state_renewal_ops,
4988#if defined(CONFIG_NFS_V4_1)
4989 &nfs41_state_renewal_ops,
4990#endif
4991};
4992
92e1d5be 4993static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4994 .permission = nfs_permission,
4995 .getattr = nfs_getattr,
4996 .setattr = nfs_setattr,
4997 .getxattr = nfs4_getxattr,
4998 .setxattr = nfs4_setxattr,
4999 .listxattr = nfs4_listxattr,
5000};
5001
509de811 5002const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 5003 .version = 4, /* protocol version */
5004 .dentry_ops = &nfs4_dentry_operations,
5005 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 5006 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 5007 .getroot = nfs4_proc_get_root,
5008 .getattr = nfs4_proc_getattr,
5009 .setattr = nfs4_proc_setattr,
2b3de441 5010 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 5011 .lookup = nfs4_proc_lookup,
5012 .access = nfs4_proc_access,
5013 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5014 .create = nfs4_proc_create,
5015 .remove = nfs4_proc_remove,
5016 .unlink_setup = nfs4_proc_unlink_setup,
5017 .unlink_done = nfs4_proc_unlink_done,
5018 .rename = nfs4_proc_rename,
5019 .link = nfs4_proc_link,
5020 .symlink = nfs4_proc_symlink,
5021 .mkdir = nfs4_proc_mkdir,
5022 .rmdir = nfs4_proc_remove,
5023 .readdir = nfs4_proc_readdir,
5024 .mknod = nfs4_proc_mknod,
5025 .statfs = nfs4_proc_statfs,
5026 .fsinfo = nfs4_proc_fsinfo,
5027 .pathconf = nfs4_proc_pathconf,
e9326dca 5028 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5029 .decode_dirent = nfs4_decode_dirent,
5030 .read_setup = nfs4_proc_read_setup,
ec06c096 5031 .read_done = nfs4_read_done,
1da177e4 5032 .write_setup = nfs4_proc_write_setup,
788e7a89 5033 .write_done = nfs4_write_done,
1da177e4 5034 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5035 .commit_done = nfs4_commit_done,
1da177e4 5036 .lock = nfs4_proc_lock,
e50a1c2e 5037 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5038 .close_context = nfs4_close_context,
1da177e4
LT		 5039};
5040
5041/*
5042 * Local variables:
5043 * c-basic-offset: 8
5044 * End:
5045 */
Linux 6.x block layer and io_uring tree(s)