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Merge branch 'devel-for-2.6.31' into for-2.6.31
[mirror_ubuntu-artful-kernel.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>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
99fe60d0 51#include <linux/module.h>
5a0ffe54 52#include <linux/sunrpc/bc_xprt.h>
1da177e4 53
4ce79717 54#include "nfs4_fs.h"
1da177e4 55#include "delegation.h"
101070ca 56#include "internal.h"
006ea73e 57#include "iostat.h"
fc931582 58#include "callback.h"
1da177e4
LT		 59
60#define NFSDBG_FACILITY NFSDBG_PROC
61
2066fe89 62#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 63#define NFS4_POLL_RETRY_MAX (15*HZ)
64
cdd4e68b 65struct nfs4_opendata;
864472e9 66static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 67static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 68static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 71
1da177e4 72/* Prevent leaks of NFSv4 errors into userland */
46f72f57 73static int nfs4_map_errors(int err)
1da177e4
LT		 74{
75 if (err < -1000) {
76 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 77 __func__, -err);
1da177e4
LT		 78 return -EIO;
79 }
80 return err;
81}
82
83/*
84 * This is our standard bitmap for GETATTR requests.
85 */
86const u32 nfs4_fattr_bitmap[2] = {
87 FATTR4_WORD0_TYPE
88 | FATTR4_WORD0_CHANGE
89 | FATTR4_WORD0_SIZE
90 | FATTR4_WORD0_FSID
91 | FATTR4_WORD0_FILEID,
92 FATTR4_WORD1_MODE
93 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER
95 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_RAWDEV
97 | FATTR4_WORD1_SPACE_USED
98 | FATTR4_WORD1_TIME_ACCESS
99 | FATTR4_WORD1_TIME_METADATA
100 | FATTR4_WORD1_TIME_MODIFY
101};
102
103const u32 nfs4_statfs_bitmap[2] = {
104 FATTR4_WORD0_FILES_AVAIL
105 | FATTR4_WORD0_FILES_FREE
106 | FATTR4_WORD0_FILES_TOTAL,
107 FATTR4_WORD1_SPACE_AVAIL
108 | FATTR4_WORD1_SPACE_FREE
109 | FATTR4_WORD1_SPACE_TOTAL
110};
111
4ce79717 112const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 113 FATTR4_WORD0_MAXLINK
114 | FATTR4_WORD0_MAXNAME,
115 0
116};
117
118const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
119 | FATTR4_WORD0_MAXREAD
120 | FATTR4_WORD0_MAXWRITE
121 | FATTR4_WORD0_LEASE_TIME,
122 0
123};
124
830b8e33
MN		 125const u32 nfs4_fs_locations_bitmap[2] = {
126 FATTR4_WORD0_TYPE
127 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_SIZE
129 | FATTR4_WORD0_FSID
130 | FATTR4_WORD0_FILEID
131 | FATTR4_WORD0_FS_LOCATIONS,
132 FATTR4_WORD1_MODE
133 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER
135 | FATTR4_WORD1_OWNER_GROUP
136 | FATTR4_WORD1_RAWDEV
137 | FATTR4_WORD1_SPACE_USED
138 | FATTR4_WORD1_TIME_ACCESS
139 | FATTR4_WORD1_TIME_METADATA
140 | FATTR4_WORD1_TIME_MODIFY
141 | FATTR4_WORD1_MOUNTED_ON_FILEID
142};
143
bc4785cd 144static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 145 struct nfs4_readdir_arg *readdir)
146{
0dbb4c67 147 __be32 *start, *p;
1da177e4
LT		 148
149 BUG_ON(readdir->count < 80);
150 if (cookie > 2) {
b7ef1956 151 readdir->cookie = cookie;
1da177e4
LT		 152 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
153 return;
154 }
155
156 readdir->cookie = 0;
157 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
158 if (cookie == 2)
159 return;
160
161 /*
162 * NFSv4 servers do not return entries for '.' and '..'
163 * Therefore, we fake these entries here. We let '.'
164 * have cookie 0 and '..' have cookie 1. Note that
165 * when talking to the server, we always send cookie 0
166 * instead of 1 or 2.
167 */
0dbb4c67 168 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 169
170 if (cookie == 0) {
171 *p++ = xdr_one; /* next */
172 *p++ = xdr_zero; /* cookie, first word */
173 *p++ = xdr_one; /* cookie, second word */
174 *p++ = xdr_one; /* entry len */
175 memcpy(p, ".\0\0\0", 4); /* entry */
176 p++;
177 *p++ = xdr_one; /* bitmap length */
178 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
179 *p++ = htonl(8); /* attribute buffer length */
4e769b93 180 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 181 }
182
183 *p++ = xdr_one; /* next */
184 *p++ = xdr_zero; /* cookie, first word */
185 *p++ = xdr_two; /* cookie, second word */
186 *p++ = xdr_two; /* entry len */
187 memcpy(p, "..\0\0", 4); /* entry */
188 p++;
189 *p++ = xdr_one; /* bitmap length */
190 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
191 *p++ = htonl(8); /* attribute buffer length */
4e769b93 192 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 193
194 readdir->pgbase = (char *)p - (char *)start;
195 readdir->count -= readdir->pgbase;
196 kunmap_atomic(start, KM_USER0);
197}
198
65de872e
TM		 199static int nfs4_wait_clnt_recover(struct nfs_client *clp)
200{
201 int res;
202
203 might_sleep();
204
e005e804 205 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 206 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 207 return res;
208}
209
210static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
211{
212 int res = 0;
213
214 might_sleep();
215
216 if (*timeout <= 0)
217 *timeout = NFS4_POLL_RETRY_MIN;
218 if (*timeout > NFS4_POLL_RETRY_MAX)
219 *timeout = NFS4_POLL_RETRY_MAX;
220 schedule_timeout_killable(*timeout);
221 if (fatal_signal_pending(current))
222 res = -ERESTARTSYS;
223 *timeout <<= 1;
224 return res;
225}
226
227/* This is the error handling routine for processes that are allowed
228 * to sleep.
229 */
230static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
231{
232 struct nfs_client *clp = server->nfs_client;
9e33bed5 233 struct nfs4_state *state = exception->state;
65de872e
TM		 234 int ret = errorcode;
235
236 exception->retry = 0;
237 switch(errorcode) {
238 case 0:
239 return 0;
9e33bed5
TM		 240 case -NFS4ERR_ADMIN_REVOKED:
241 case -NFS4ERR_BAD_STATEID:
242 case -NFS4ERR_OPENMODE:
243 if (state == NULL)
244 break;
245 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 246 case -NFS4ERR_STALE_CLIENTID:
247 case -NFS4ERR_STALE_STATEID:
248 case -NFS4ERR_EXPIRED:
249 nfs4_schedule_state_recovery(clp);
250 ret = nfs4_wait_clnt_recover(clp);
251 if (ret == 0)
252 exception->retry = 1;
4745e315 253#if !defined(CONFIG_NFS_V4_1)
65de872e 254 break;
4745e315
AA		 255#else /* !defined(CONFIG_NFS_V4_1) */
256 if (!nfs4_has_session(server->nfs_client))
257 break;
258 /* FALLTHROUGH */
259 case -NFS4ERR_BADSESSION:
260 case -NFS4ERR_BADSLOT:
261 case -NFS4ERR_BAD_HIGH_SLOT:
262 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
263 case -NFS4ERR_DEADSESSION:
264 case -NFS4ERR_SEQ_FALSE_RETRY:
265 case -NFS4ERR_SEQ_MISORDERED:
266 dprintk("%s ERROR: %d Reset session\n", __func__,
267 errorcode);
268 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
269 exception->retry = 1;
270 /* FALLTHROUGH */
271#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM		 272 case -NFS4ERR_FILE_OPEN:
273 case -NFS4ERR_GRACE:
274 case -NFS4ERR_DELAY:
275 ret = nfs4_delay(server->client, &exception->timeout);
276 if (ret != 0)
277 break;
278 case -NFS4ERR_OLD_STATEID:
279 exception->retry = 1;
280 }
281 /* We failed to handle the error */
282 return nfs4_map_errors(ret);
283}
284
285
26e976a8 286static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 287{
7539bbab 288 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 289 spin_lock(&clp->cl_lock);
290 if (time_before(clp->cl_last_renewal,timestamp))
291 clp->cl_last_renewal = timestamp;
292 spin_unlock(&clp->cl_lock);
293}
294
cccef3b9
AA		 295#if defined(CONFIG_NFS_V4_1)
296
e2c4ab3c
AA		 297/*
298 * nfs4_free_slot - free a slot and efficiently update slot table.
299 *
300 * freeing a slot is trivially done by clearing its respective bit
301 * in the bitmap.
302 * If the freed slotid equals highest_used_slotid we want to update it
303 * so that the server would be able to size down the slot table if needed,
304 * otherwise we know that the highest_used_slotid is still in use.
305 * When updating highest_used_slotid there may be "holes" in the bitmap
306 * so we need to scan down from highest_used_slotid to 0 looking for the now
307 * highest slotid in use.
308 * If none found, highest_used_slotid is set to -1.
309 */
310static void
311nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
312{
313 int slotid = free_slotid;
314
315 spin_lock(&tbl->slot_tbl_lock);
316 /* clear used bit in bitmap */
317 __clear_bit(slotid, tbl->used_slots);
318
319 /* update highest_used_slotid when it is freed */
320 if (slotid == tbl->highest_used_slotid) {
321 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
322 if (slotid >= 0 && slotid < tbl->max_slots)
323 tbl->highest_used_slotid = slotid;
324 else
325 tbl->highest_used_slotid = -1;
326 }
327 rpc_wake_up_next(&tbl->slot_tbl_waitq);
328 spin_unlock(&tbl->slot_tbl_lock);
329 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
330 free_slotid, tbl->highest_used_slotid);
331}
332
13615871
AA		 333void nfs41_sequence_free_slot(const struct nfs_client *clp,
334 struct nfs4_sequence_res *res)
335{
336 struct nfs4_slot_table *tbl;
337
338 if (!nfs4_has_session(clp)) {
339 dprintk("%s: No session\n", __func__);
340 return;
341 }
342 tbl = &clp->cl_session->fc_slot_table;
343 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
344 dprintk("%s: No slot\n", __func__);
345 /* just wake up the next guy waiting since
346 * we may have not consumed a slot after all */
347 rpc_wake_up_next(&tbl->slot_tbl_waitq);
348 return;
349 }
350 nfs4_free_slot(tbl, res->sr_slotid);
351 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
352}
353
b0df806c
AA		 354static void nfs41_sequence_done(struct nfs_client *clp,
355 struct nfs4_sequence_res *res,
356 int rpc_status)
357{
358 unsigned long timestamp;
359 struct nfs4_slot_table *tbl;
360 struct nfs4_slot *slot;
361
362 /*
363 * sr_status remains 1 if an RPC level error occurred. The server
364 * may or may not have processed the sequence operation..
365 * Proceed as if the server received and processed the sequence
366 * operation.
367 */
368 if (res->sr_status == 1)
369 res->sr_status = NFS_OK;
370
371 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
372 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
373 goto out;
374
375 tbl = &clp->cl_session->fc_slot_table;
376 slot = tbl->slots + res->sr_slotid;
377
378 if (res->sr_status == 0) {
379 /* Update the slot's sequence and clientid lease timer */
380 ++slot->seq_nr;
381 timestamp = res->sr_renewal_time;
382 spin_lock(&clp->cl_lock);
383 if (time_before(clp->cl_last_renewal, timestamp))
384 clp->cl_last_renewal = timestamp;
385 spin_unlock(&clp->cl_lock);
386 return;
387 }
388out:
389 /* The session may be reset by one of the error handlers. */
390 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
391 nfs41_sequence_free_slot(clp, res);
392}
393
510b8175
BH		 394/*
395 * nfs4_find_slot - efficiently look for a free slot
396 *
397 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
398 * If found, we mark the slot as used, update the highest_used_slotid,
399 * and respectively set up the sequence operation args.
400 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 401 *
402 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 403 */
404static u8
405nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
406{
407 int slotid;
408 u8 ret_id = NFS4_MAX_SLOT_TABLE;
409 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
410
510b8175
BH		 411 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
412 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
413 tbl->max_slots);
414 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
415 if (slotid >= tbl->max_slots)
416 goto out;
417 __set_bit(slotid, tbl->used_slots);
418 if (slotid > tbl->highest_used_slotid)
419 tbl->highest_used_slotid = slotid;
420 ret_id = slotid;
421out:
422 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
423 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 424 return ret_id;
425}
426
b069d94a
AA		 427static int nfs4_recover_session(struct nfs4_session *session)
428{
429 struct nfs_client *clp = session->clp;
430 int ret;
431
432 for (;;) {
433 ret = nfs4_wait_clnt_recover(clp);
434 if (ret != 0)
435 return ret;
436 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
437 break;
438 nfs4_schedule_state_manager(clp);
439 }
440 return 0;
441}
442
ce5039c1
AA		 443static int nfs41_setup_sequence(struct nfs4_session *session,
444 struct nfs4_sequence_args *args,
445 struct nfs4_sequence_res *res,
446 int cache_reply,
447 struct rpc_task *task)
448{
fbcd4abc
AA		 449 struct nfs4_slot *slot;
450 struct nfs4_slot_table *tbl;
b069d94a 451 int status = 0;
fbcd4abc
AA		 452 u8 slotid;
453
454 dprintk("--> %s\n", __func__);
ce5039c1
AA		 455 /* slot already allocated? */
456 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
457 return 0;
458
459 memset(res, 0, sizeof(*res));
460 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 461 tbl = &session->fc_slot_table;
462
463 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 464 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
465 if (tbl->highest_used_slotid != -1) {
466 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
467 spin_unlock(&tbl->slot_tbl_lock);
468 dprintk("<-- %s: Session reset: draining\n", __func__);
469 return -EAGAIN;
470 }
471
472 /* The slot table is empty; start the reset thread */
473 dprintk("%s Session Reset\n", __func__);
474 spin_unlock(&tbl->slot_tbl_lock);
475 status = nfs4_recover_session(session);
476 if (status)
477 return status;
478 spin_lock(&tbl->slot_tbl_lock);
479 }
480
fbcd4abc
AA		 481 slotid = nfs4_find_slot(tbl, task);
482 if (slotid == NFS4_MAX_SLOT_TABLE) {
483 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
484 spin_unlock(&tbl->slot_tbl_lock);
485 dprintk("<-- %s: no free slots\n", __func__);
486 return -EAGAIN;
487 }
488 spin_unlock(&tbl->slot_tbl_lock);
489
490 slot = tbl->slots + slotid;
99fe60d0 491 args->sa_session = session;
fbcd4abc
AA		 492 args->sa_slotid = slotid;
493 args->sa_cache_this = cache_reply;
494
495 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
496
99fe60d0 497 res->sr_session = session;
fbcd4abc
AA		 498 res->sr_slotid = slotid;
499 res->sr_renewal_time = jiffies;
500 /*
501 * sr_status is only set in decode_sequence, and so will remain
502 * set to 1 if an rpc level failure occurs.
503 */
504 res->sr_status = 1;
ce5039c1
AA		 505 return 0;
506}
507
508int nfs4_setup_sequence(struct nfs_client *clp,
509 struct nfs4_sequence_args *args,
510 struct nfs4_sequence_res *res,
511 int cache_reply,
512 struct rpc_task *task)
513{
514 int ret = 0;
515
516 dprintk("--> %s clp %p session %p sr_slotid %d\n",
517 __func__, clp, clp->cl_session, res->sr_slotid);
518
519 if (!nfs4_has_session(clp))
520 goto out;
521 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
522 task);
523 if (ret != -EAGAIN) {
524 /* terminate rpc task */
525 task->tk_status = ret;
526 task->tk_action = NULL;
527 }
528out:
529 dprintk("<-- %s status=%d\n", __func__, ret);
530 return ret;
531}
532
533struct nfs41_call_sync_data {
534 struct nfs_client *clp;
535 struct nfs4_sequence_args *seq_args;
536 struct nfs4_sequence_res *seq_res;
537 int cache_reply;
538};
539
540static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
541{
542 struct nfs41_call_sync_data *data = calldata;
543
544 dprintk("--> %s data->clp->cl_session %p\n", __func__,
545 data->clp->cl_session);
546 if (nfs4_setup_sequence(data->clp, data->seq_args,
547 data->seq_res, data->cache_reply, task))
548 return;
549 rpc_call_start(task);
550}
551
69ab40c4
AA		 552static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
553{
554 struct nfs41_call_sync_data *data = calldata;
555
556 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
557 nfs41_sequence_free_slot(data->clp, data->seq_res);
558}
559
ce5039c1
AA		 560struct rpc_call_ops nfs41_call_sync_ops = {
561 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 562 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 563};
564
565static int nfs4_call_sync_sequence(struct nfs_client *clp,
566 struct rpc_clnt *clnt,
567 struct rpc_message *msg,
568 struct nfs4_sequence_args *args,
569 struct nfs4_sequence_res *res,
570 int cache_reply)
571{
572 int ret;
573 struct rpc_task *task;
574 struct nfs41_call_sync_data data = {
575 .clp = clp,
576 .seq_args = args,
577 .seq_res = res,
578 .cache_reply = cache_reply,
579 };
580 struct rpc_task_setup task_setup = {
581 .rpc_client = clnt,
582 .rpc_message = msg,
583 .callback_ops = &nfs41_call_sync_ops,
584 .callback_data = &data
585 };
586
587 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
588 task = rpc_run_task(&task_setup);
589 if (IS_ERR(task))
590 ret = PTR_ERR(task);
591 else {
592 ret = task->tk_status;
593 rpc_put_task(task);
594 }
595 return ret;
596}
597
cccef3b9
AA		 598int _nfs4_call_sync_session(struct nfs_server *server,
599 struct rpc_message *msg,
600 struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res,
602 int cache_reply)
603{
ce5039c1
AA		 604 return nfs4_call_sync_sequence(server->nfs_client, server->client,
605 msg, args, res, cache_reply);
cccef3b9
AA		 606}
607
608#endif /* CONFIG_NFS_V4_1 */
609
610int _nfs4_call_sync(struct nfs_server *server,
611 struct rpc_message *msg,
612 struct nfs4_sequence_args *args,
613 struct nfs4_sequence_res *res,
614 int cache_reply)
615{
f3752975 616 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 617 return rpc_call_sync(server->client, msg, 0);
618}
619
620#define nfs4_call_sync(server, msg, args, res, cache_reply) \
621 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
622 &(res)->seq_res, (cache_reply))
623
b0df806c
AA		 624static void nfs4_sequence_done(const struct nfs_server *server,
625 struct nfs4_sequence_res *res, int rpc_status)
626{
627#ifdef CONFIG_NFS_V4_1
628 if (nfs4_has_session(server->nfs_client))
629 nfs41_sequence_done(server->nfs_client, res, rpc_status);
630#endif /* CONFIG_NFS_V4_1 */
631}
632
633/* no restart, therefore free slot here */
634static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
635 struct nfs4_sequence_res *res,
636 int rpc_status)
637{
638 nfs4_sequence_done(server, res, rpc_status);
639 nfs4_sequence_free_slot(server->nfs_client, res);
640}
641
38478b24 642static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 643{
38478b24 644 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 645
38478b24 646 spin_lock(&dir->i_lock);
40d24704
TM		 647 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
648 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 649 nfs_force_lookup_revalidate(dir);
40d24704 650 nfsi->change_attr = cinfo->after;
38478b24 651 spin_unlock(&dir->i_lock);
1da177e4
LT		 652}
653
e56e0b78 654struct nfs4_opendata {
c6d00e63 655 struct kref kref;
e56e0b78
TM		 656 struct nfs_openargs o_arg;
657 struct nfs_openres o_res;
cdd4e68b
TM		 658 struct nfs_open_confirmargs c_arg;
659 struct nfs_open_confirmres c_res;
e56e0b78
TM		 660 struct nfs_fattr f_attr;
661 struct nfs_fattr dir_attr;
ad389da7 662 struct path path;
e56e0b78
TM		 663 struct dentry *dir;
664 struct nfs4_state_owner *owner;
aac00a8d 665 struct nfs4_state *state;
e56e0b78 666 struct iattr attrs;
26e976a8 667 unsigned long timestamp;
3e309914 668 unsigned int rpc_done : 1;
24ac23ab
TM		 669 int rpc_status;
670 int cancelled;
e56e0b78
TM		 671};
672
2ced46c2
TM		 673
674static void nfs4_init_opendata_res(struct nfs4_opendata *p)
675{
676 p->o_res.f_attr = &p->f_attr;
677 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 678 p->o_res.seqid = p->o_arg.seqid;
679 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 680 p->o_res.server = p->o_arg.server;
681 nfs_fattr_init(&p->f_attr);
682 nfs_fattr_init(&p->dir_attr);
683}
684
ad389da7 685static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 686 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 687 const struct iattr *attrs)
688{
ad389da7 689 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 690 struct inode *dir = parent->d_inode;
691 struct nfs_server *server = NFS_SERVER(dir);
692 struct nfs4_opendata *p;
693
694 p = kzalloc(sizeof(*p), GFP_KERNEL);
695 if (p == NULL)
696 goto err;
697 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
698 if (p->o_arg.seqid == NULL)
699 goto err_free;
ad389da7
TM		 700 p->path.mnt = mntget(path->mnt);
701 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 702 p->dir = parent;
703 p->owner = sp;
704 atomic_inc(&sp->so_count);
705 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 706 p->o_arg.open_flags = flags;
707 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 708 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 709 p->o_arg.id = sp->so_owner_id.id;
ad389da7 710 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 711 p->o_arg.server = server;
712 p->o_arg.bitmask = server->attr_bitmask;
713 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 714 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 715 if (flags & O_EXCL) {
716 u32 *s = (u32 *) p->o_arg.u.verifier.data;
717 s[0] = jiffies;
718 s[1] = current->pid;
719 } else if (flags & O_CREAT) {
720 p->o_arg.u.attrs = &p->attrs;
721 memcpy(&p->attrs, attrs, sizeof(p->attrs));
722 }
cdd4e68b
TM		 723 p->c_arg.fh = &p->o_res.fh;
724 p->c_arg.stateid = &p->o_res.stateid;
725 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 726 nfs4_init_opendata_res(p);
c6d00e63 727 kref_init(&p->kref);
e56e0b78
TM		 728 return p;
729err_free:
730 kfree(p);
731err:
732 dput(parent);
733 return NULL;
734}
735
c6d00e63 736static void nfs4_opendata_free(struct kref *kref)
e56e0b78 737{
c6d00e63
TM		 738 struct nfs4_opendata *p = container_of(kref,
739 struct nfs4_opendata, kref);
740
741 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 742 if (p->state != NULL)
743 nfs4_put_open_state(p->state);
c6d00e63
TM		 744 nfs4_put_state_owner(p->owner);
745 dput(p->dir);
31f31db1 746 path_put(&p->path);
c6d00e63
TM		 747 kfree(p);
748}
749
750static void nfs4_opendata_put(struct nfs4_opendata *p)
751{
752 if (p != NULL)
753 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 754}
755
06f814a3
TM		 756static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
757{
06f814a3
TM		 758 int ret;
759
06f814a3 760 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 761 return ret;
762}
763
dc0b027d 764static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 765{
766 int ret = 0;
dc0b027d
TM		 767
768 if (open_mode & O_EXCL)
769 goto out;
770 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 771 case FMODE_READ:
772 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 773 break;
774 case FMODE_WRITE:
775 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 776 break;
777 case FMODE_READ|FMODE_WRITE:
778 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
779 }
dc0b027d 780out:
6ee41268
TM		 781 return ret;
782}
783
dc0b027d 784static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 785{
dc0b027d 786 if ((delegation->type & fmode) != fmode)
aac00a8d 787 return 0;
15c831bf 788 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 789 return 0;
b7391f44 790 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 791 return 1;
792}
793
dc0b027d 794static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 795{
dc0b027d 796 switch (fmode) {
e7616923
TM		 797 case FMODE_WRITE:
798 state->n_wronly++;
799 break;
800 case FMODE_READ:
801 state->n_rdonly++;
802 break;
803 case FMODE_READ|FMODE_WRITE:
804 state->n_rdwr++;
805 }
dc0b027d 806 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 807}
808
dc0b027d 809static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 810{
811 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
812 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
813 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 814 switch (fmode) {
003707c7
TM		 815 case FMODE_READ:
816 set_bit(NFS_O_RDONLY_STATE, &state->flags);
817 break;
818 case FMODE_WRITE:
819 set_bit(NFS_O_WRONLY_STATE, &state->flags);
820 break;
821 case FMODE_READ|FMODE_WRITE:
822 set_bit(NFS_O_RDWR_STATE, &state->flags);
823 }
e7616923
TM		 824}
825
dc0b027d 826static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 827{
8bda4e4c 828 write_seqlock(&state->seqlock);
dc0b027d 829 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 830 write_sequnlock(&state->seqlock);
003707c7
TM		 831}
832
dc0b027d 833static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 834{
8bda4e4c
TM		 835 /*
836 * Protect the call to nfs4_state_set_mode_locked and
837 * serialise the stateid update
838 */
839 write_seqlock(&state->seqlock);
003707c7
TM		 840 if (deleg_stateid != NULL) {
841 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
842 set_bit(NFS_DELEGATED_STATE, &state->flags);
843 }
844 if (open_stateid != NULL)
dc0b027d 845 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 846 write_sequnlock(&state->seqlock);
847 spin_lock(&state->owner->so_lock);
dc0b027d 848 update_open_stateflags(state, fmode);
ec073428 849 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 850}
851
dc0b027d 852static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 853{
854 struct nfs_inode *nfsi = NFS_I(state->inode);
855 struct nfs_delegation *deleg_cur;
856 int ret = 0;
857
dc0b027d 858 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 859
860 rcu_read_lock();
861 deleg_cur = rcu_dereference(nfsi->delegation);
862 if (deleg_cur == NULL)
863 goto no_delegation;
864
865 spin_lock(&deleg_cur->lock);
866 if (nfsi->delegation != deleg_cur ||
dc0b027d 867 (deleg_cur->type & fmode) != fmode)
34310430
TM		 868 goto no_delegation_unlock;
869
870 if (delegation == NULL)
871 delegation = &deleg_cur->stateid;
872 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
873 goto no_delegation_unlock;
874
b7391f44 875 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 876 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 877 ret = 1;
878no_delegation_unlock:
879 spin_unlock(&deleg_cur->lock);
880no_delegation:
881 rcu_read_unlock();
882
883 if (!ret && open_stateid != NULL) {
dc0b027d 884 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 885 ret = 1;
886 }
887
888 return ret;
889}
890
891
dc0b027d 892static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 893{
894 struct nfs_delegation *delegation;
895
896 rcu_read_lock();
897 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 898 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 899 rcu_read_unlock();
900 return;
901 }
902 rcu_read_unlock();
903 nfs_inode_return_delegation(inode);
904}
905
6ee41268 906static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 907{
908 struct nfs4_state *state = opendata->state;
909 struct nfs_inode *nfsi = NFS_I(state->inode);
910 struct nfs_delegation *delegation;
dc0b027d
TM		 911 int open_mode = opendata->o_arg.open_flags & O_EXCL;
912 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 913 nfs4_stateid stateid;
914 int ret = -EAGAIN;
915
aac00a8d 916 for (;;) {
dc0b027d 917 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 918 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 919 if (can_open_cached(state, fmode, open_mode)) {
920 update_open_stateflags(state, fmode);
6ee41268 921 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 922 goto out_return_state;
923 }
924 spin_unlock(&state->owner->so_lock);
925 }
34310430
TM		 926 rcu_read_lock();
927 delegation = rcu_dereference(nfsi->delegation);
928 if (delegation == NULL ||
dc0b027d 929 !can_open_delegated(delegation, fmode)) {
34310430 930 rcu_read_unlock();
aac00a8d 931 break;
34310430 932 }
aac00a8d
TM		 933 /* Save the delegation */
934 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
935 rcu_read_unlock();
af22f94a 936 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 937 if (ret != 0)
938 goto out;
939 ret = -EAGAIN;
34310430
TM		 940
941 /* Try to update the stateid using the delegation */
dc0b027d 942 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 943 goto out_return_state;
aac00a8d 944 }
aac00a8d
TM		 945out:
946 return ERR_PTR(ret);
947out_return_state:
948 atomic_inc(&state->count);
949 return state;
950}
951
24ac23ab
TM		 952static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
953{
954 struct inode *inode;
955 struct nfs4_state *state = NULL;
003707c7 956 struct nfs_delegation *delegation;
1b370bc2 957 int ret;
24ac23ab 958
aac00a8d 959 if (!data->rpc_done) {
6ee41268 960 state = nfs4_try_open_cached(data);
aac00a8d
TM		 961 goto out;
962 }
963
1b370bc2 964 ret = -EAGAIN;
24ac23ab 965 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 966 goto err;
24ac23ab 967 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 968 ret = PTR_ERR(inode);
03f28e3a 969 if (IS_ERR(inode))
1b370bc2
TM		 970 goto err;
971 ret = -ENOMEM;
24ac23ab
TM		 972 state = nfs4_get_open_state(inode, data->owner);
973 if (state == NULL)
1b370bc2 974 goto err_put_inode;
549d6ed5 975 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 976 int delegation_flags = 0;
977
003707c7
TM		 978 rcu_read_lock();
979 delegation = rcu_dereference(NFS_I(inode)->delegation);
980 if (delegation)
981 delegation_flags = delegation->flags;
982 rcu_read_unlock();
15c831bf 983 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 984 nfs_inode_set_delegation(state->inode,
985 data->owner->so_cred,
986 &data->o_res);
987 else
988 nfs_inode_reclaim_delegation(state->inode,
989 data->owner->so_cred,
990 &data->o_res);
991 }
34310430
TM		 992
993 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 994 data->o_arg.fmode);
24ac23ab 995 iput(inode);
aac00a8d 996out:
24ac23ab 997 return state;
1b370bc2
TM		 998err_put_inode:
999 iput(inode);
1000err:
1001 return ERR_PTR(ret);
24ac23ab
TM		 1002}
1003
864472e9
TM		 1004static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1005{
1006 struct nfs_inode *nfsi = NFS_I(state->inode);
1007 struct nfs_open_context *ctx;
1008
1009 spin_lock(&state->inode->i_lock);
1010 list_for_each_entry(ctx, &nfsi->open_files, list) {
1011 if (ctx->state != state)
1012 continue;
1013 get_nfs_open_context(ctx);
1014 spin_unlock(&state->inode->i_lock);
1015 return ctx;
1016 }
1017 spin_unlock(&state->inode->i_lock);
1018 return ERR_PTR(-ENOENT);
1019}
1020
6f220ed5
TM		 1021static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1022{
1023 struct nfs4_opendata *opendata;
1024
dc0b027d 1025 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1026 if (opendata == NULL)
1027 return ERR_PTR(-ENOMEM);
1028 opendata->state = state;
1029 atomic_inc(&state->count);
1030 return opendata;
1031}
1032
dc0b027d 1033static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1034{
2ced46c2 1035 struct nfs4_state *newstate;
864472e9
TM		 1036 int ret;
1037
dc0b027d
TM		 1038 opendata->o_arg.open_flags = 0;
1039 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1040 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1041 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1042 nfs4_init_opendata_res(opendata);
864472e9
TM		 1043 ret = _nfs4_proc_open(opendata);
1044 if (ret != 0)
1045 return ret;
2ced46c2 1046 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1047 if (IS_ERR(newstate))
1048 return PTR_ERR(newstate);
dc0b027d 1049 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1050 *res = newstate;
864472e9
TM		 1051 return 0;
1052}
1053
1054static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1055{
864472e9 1056 struct nfs4_state *newstate;
864472e9
TM		 1057 int ret;
1058
1059 /* memory barrier prior to reading state->n_* */
2ced46c2 1060 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1061 smp_rmb();
1062 if (state->n_rdwr != 0) {
2ced46c2 1063 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1064 if (ret != 0)
1065 return ret;
2ced46c2
TM		 1066 if (newstate != state)
1067 return -ESTALE;
864472e9
TM		 1068 }
1069 if (state->n_wronly != 0) {
2ced46c2 1070 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1071 if (ret != 0)
1072 return ret;
2ced46c2
TM		 1073 if (newstate != state)
1074 return -ESTALE;
864472e9
TM		 1075 }
1076 if (state->n_rdonly != 0) {
2ced46c2 1077 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1078 if (ret != 0)
1079 return ret;
2ced46c2
TM		 1080 if (newstate != state)
1081 return -ESTALE;
864472e9 1082 }
1ac7e2fd
TM		 1083 /*
1084 * We may have performed cached opens for all three recoveries.
1085 * Check if we need to update the current stateid.
1086 */
1087 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1088 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1089 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1090 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1091 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1092 write_sequnlock(&state->seqlock);
1ac7e2fd 1093 }
864472e9
TM		 1094 return 0;
1095}
1096
1da177e4
LT		 1097/*
1098 * OPEN_RECLAIM:
1099 * reclaim state on the server after a reboot.
1da177e4 1100 */
539cd03a 1101static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1102{
1ac7e2fd 1103 struct nfs_delegation *delegation;
864472e9 1104 struct nfs4_opendata *opendata;
dc0b027d 1105 fmode_t delegation_type = 0;
1da177e4
LT		 1106 int status;
1107
6f220ed5
TM		 1108 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1109 if (IS_ERR(opendata))
1110 return PTR_ERR(opendata);
864472e9
TM		 1111 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1112 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1113 rcu_read_lock();
1114 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1115 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1116 delegation_type = delegation->type;
1ac7e2fd 1117 rcu_read_unlock();
864472e9
TM		 1118 opendata->o_arg.u.delegation_type = delegation_type;
1119 status = nfs4_open_recover(opendata, state);
c6d00e63 1120 nfs4_opendata_put(opendata);
1da177e4
LT		 1121 return status;
1122}
1123
539cd03a 1124static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1125{
1126 struct nfs_server *server = NFS_SERVER(state->inode);
1127 struct nfs4_exception exception = { };
1128 int err;
1129 do {
539cd03a 1130 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1131 if (err != -NFS4ERR_DELAY)
1132 break;
1133 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1134 } while (exception.retry);
1135 return err;
1136}
1137
864472e9
TM		 1138static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1139{
1140 struct nfs_open_context *ctx;
1141 int ret;
1142
1143 ctx = nfs4_state_find_open_context(state);
1144 if (IS_ERR(ctx))
1145 return PTR_ERR(ctx);
539cd03a 1146 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1147 put_nfs_open_context(ctx);
1148 return ret;
1149}
1150
13437e12 1151static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1152{
e56e0b78 1153 struct nfs4_opendata *opendata;
864472e9 1154 int ret;
1da177e4 1155
6f220ed5
TM		 1156 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1157 if (IS_ERR(opendata))
1158 return PTR_ERR(opendata);
e56e0b78 1159 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1160 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1161 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1162 ret = nfs4_open_recover(opendata, state);
c6d00e63 1163 nfs4_opendata_put(opendata);
864472e9 1164 return ret;
1da177e4
LT		 1165}
1166
13437e12 1167int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1168{
1169 struct nfs4_exception exception = { };
539cd03a 1170 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1171 int err;
1172 do {
13437e12 1173 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1174 switch (err) {
1175 case 0:
965b5d67
TM		 1176 case -ENOENT:
1177 case -ESTALE:
1178 goto out;
1da177e4
LT		 1179 case -NFS4ERR_STALE_CLIENTID:
1180 case -NFS4ERR_STALE_STATEID:
1181 case -NFS4ERR_EXPIRED:
1182 /* Don't recall a delegation if it was lost */
7539bbab 1183 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1184 goto out;
1185 case -ERESTARTSYS:
1186 /*
1187 * The show must go on: exit, but mark the
1188 * stateid as needing recovery.
1189 */
1190 case -NFS4ERR_ADMIN_REVOKED:
1191 case -NFS4ERR_BAD_STATEID:
1192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1193 case -ENOMEM:
1194 err = 0;
1195 goto out;
1da177e4
LT		 1196 }
1197 err = nfs4_handle_exception(server, err, &exception);
1198 } while (exception.retry);
965b5d67 1199out:
1da177e4
LT		 1200 return err;
1201}
1202
cdd4e68b
TM		 1203static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1204{
1205 struct nfs4_opendata *data = calldata;
1206
1207 data->rpc_status = task->tk_status;
1208 if (RPC_ASSASSINATED(task))
1209 return;
26e976a8 1210 if (data->rpc_status == 0) {
cdd4e68b
TM		 1211 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1212 sizeof(data->o_res.stateid.data));
bb22629e 1213 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1214 renew_lease(data->o_res.server, data->timestamp);
3e309914 1215 data->rpc_done = 1;
26e976a8 1216 }
cdd4e68b
TM		 1217}
1218
1219static void nfs4_open_confirm_release(void *calldata)
1220{
1221 struct nfs4_opendata *data = calldata;
1222 struct nfs4_state *state = NULL;
1223
1224 /* If this request hasn't been cancelled, do nothing */
1225 if (data->cancelled == 0)
1226 goto out_free;
1227 /* In case of error, no cleanup! */
3e309914 1228 if (!data->rpc_done)
cdd4e68b 1229 goto out_free;
cdd4e68b 1230 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1231 if (!IS_ERR(state))
dc0b027d 1232 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1233out_free:
c6d00e63 1234 nfs4_opendata_put(data);
cdd4e68b
TM		 1235}
1236
1237static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1238 .rpc_call_done = nfs4_open_confirm_done,
1239 .rpc_release = nfs4_open_confirm_release,
1240};
1241
1242/*
1243 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1244 */
1245static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1246{
1247 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1248 struct rpc_task *task;
5138fde0
TM		 1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1251 .rpc_argp = &data->c_arg,
1252 .rpc_resp = &data->c_res,
1253 .rpc_cred = data->owner->so_cred,
1254 };
c970aa85
TM		 1255 struct rpc_task_setup task_setup_data = {
1256 .rpc_client = server->client,
5138fde0 1257 .rpc_message = &msg,
c970aa85
TM		 1258 .callback_ops = &nfs4_open_confirm_ops,
1259 .callback_data = data,
101070ca 1260 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1261 .flags = RPC_TASK_ASYNC,
1262 };
1da177e4
LT		 1263 int status;
1264
c6d00e63 1265 kref_get(&data->kref);
3e309914
TM		 1266 data->rpc_done = 0;
1267 data->rpc_status = 0;
5138fde0 1268 data->timestamp = jiffies;
c970aa85 1269 task = rpc_run_task(&task_setup_data);
7a1218a2 1270 if (IS_ERR(task))
cdd4e68b 1271 return PTR_ERR(task);
cdd4e68b
TM		 1272 status = nfs4_wait_for_completion_rpc_task(task);
1273 if (status != 0) {
1274 data->cancelled = 1;
1275 smp_wmb();
1276 } else
1277 status = data->rpc_status;
e6b3c4db 1278 rpc_put_task(task);
1da177e4
LT		 1279 return status;
1280}
1281
24ac23ab 1282static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1283{
24ac23ab
TM		 1284 struct nfs4_opendata *data = calldata;
1285 struct nfs4_state_owner *sp = data->owner;
5138fde0 1286
24ac23ab
TM		 1287 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1288 return;
aac00a8d
TM		 1289 /*
1290 * Check if we still need to send an OPEN call, or if we can use
1291 * a delegation instead.
1292 */
1293 if (data->state != NULL) {
1294 struct nfs_delegation *delegation;
1295
dc0b027d 1296 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1297 goto out_no_action;
aac00a8d
TM		 1298 rcu_read_lock();
1299 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1300 if (delegation != NULL &&
15c831bf 1301 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1302 rcu_read_unlock();
6ee41268 1303 goto out_no_action;
aac00a8d
TM		 1304 }
1305 rcu_read_unlock();
1306 }
24ac23ab 1307 /* Update sequence id. */
9f958ab8 1308 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1309 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1311 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1312 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1313 }
26e976a8 1314 data->timestamp = jiffies;
d898528c
AA		 1315 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1316 &data->o_arg.seq_args,
1317 &data->o_res.seq_res, 1, task))
1318 return;
5138fde0 1319 rpc_call_start(task);
6ee41268
TM		 1320 return;
1321out_no_action:
1322 task->tk_action = NULL;
1323
24ac23ab 1324}
1da177e4 1325
24ac23ab
TM		 1326static void nfs4_open_done(struct rpc_task *task, void *calldata)
1327{
1328 struct nfs4_opendata *data = calldata;
1da177e4 1329
24ac23ab 1330 data->rpc_status = task->tk_status;
d898528c
AA		 1331
1332 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1333 task->tk_status);
1334
24ac23ab
TM		 1335 if (RPC_ASSASSINATED(task))
1336 return;
1337 if (task->tk_status == 0) {
1338 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1339 case S_IFREG:
1340 break;
1341 case S_IFLNK:
24ac23ab 1342 data->rpc_status = -ELOOP;
6f926b5b
TM		 1343 break;
1344 case S_IFDIR:
24ac23ab 1345 data->rpc_status = -EISDIR;
6f926b5b
TM		 1346 break;
1347 default:
24ac23ab 1348 data->rpc_status = -ENOTDIR;
6f926b5b 1349 }
26e976a8 1350 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1351 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1352 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1353 }
3e309914 1354 data->rpc_done = 1;
24ac23ab 1355}
6f926b5b 1356
24ac23ab
TM		 1357static void nfs4_open_release(void *calldata)
1358{
1359 struct nfs4_opendata *data = calldata;
1360 struct nfs4_state *state = NULL;
1361
1362 /* If this request hasn't been cancelled, do nothing */
1363 if (data->cancelled == 0)
1364 goto out_free;
1365 /* In case of error, no cleanup! */
3e309914 1366 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1367 goto out_free;
1368 /* In case we need an open_confirm, no cleanup! */
1369 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1370 goto out_free;
24ac23ab 1371 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1372 if (!IS_ERR(state))
dc0b027d 1373 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1374out_free:
c6d00e63 1375 nfs4_opendata_put(data);
24ac23ab
TM		 1376}
1377
1378static const struct rpc_call_ops nfs4_open_ops = {
1379 .rpc_call_prepare = nfs4_open_prepare,
1380 .rpc_call_done = nfs4_open_done,
1381 .rpc_release = nfs4_open_release,
1382};
1383
1384/*
1385 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1386 */
1387static int _nfs4_proc_open(struct nfs4_opendata *data)
1388{
1389 struct inode *dir = data->dir->d_inode;
1390 struct nfs_server *server = NFS_SERVER(dir);
1391 struct nfs_openargs *o_arg = &data->o_arg;
1392 struct nfs_openres *o_res = &data->o_res;
1393 struct rpc_task *task;
5138fde0
TM		 1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1396 .rpc_argp = o_arg,
1397 .rpc_resp = o_res,
1398 .rpc_cred = data->owner->so_cred,
1399 };
c970aa85
TM		 1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
5138fde0 1402 .rpc_message = &msg,
c970aa85
TM		 1403 .callback_ops = &nfs4_open_ops,
1404 .callback_data = data,
101070ca 1405 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1406 .flags = RPC_TASK_ASYNC,
1407 };
24ac23ab
TM		 1408 int status;
1409
c6d00e63 1410 kref_get(&data->kref);
3e309914
TM		 1411 data->rpc_done = 0;
1412 data->rpc_status = 0;
2ced46c2 1413 data->cancelled = 0;
c970aa85 1414 task = rpc_run_task(&task_setup_data);
7a1218a2 1415 if (IS_ERR(task))
24ac23ab 1416 return PTR_ERR(task);
24ac23ab
TM		 1417 status = nfs4_wait_for_completion_rpc_task(task);
1418 if (status != 0) {
1419 data->cancelled = 1;
1420 smp_wmb();
1421 } else
1422 status = data->rpc_status;
e6b3c4db 1423 rpc_put_task(task);
3e309914 1424 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1425 return status;
1426
9936781d
TM		 1427 if (o_res->fh.size == 0)
1428 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1429
56ae19f3
TM		 1430 if (o_arg->open_flags & O_CREAT) {
1431 update_changeattr(dir, &o_res->cinfo);
1432 nfs_post_op_update_inode(dir, o_res->dir_attr);
1433 } else
1434 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1435 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1436 status = _nfs4_proc_open_confirm(data);
1da177e4 1437 if (status != 0)
24ac23ab 1438 return status;
1da177e4
LT		 1439 }
1440 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1441 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1442 return 0;
1da177e4
LT		 1443}
1444
10afec90 1445static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1446{
7539bbab 1447 struct nfs_client *clp = server->nfs_client;
6b30954e 1448 int ret;
58d9714a 1449
6b30954e 1450 for (;;) {
65de872e 1451 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1452 if (ret != 0)
1453 return ret;
e598d843
TM		 1454 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1455 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1456 break;
58d9714a 1457 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1458 }
1459 return 0;
58d9714a
TM		 1460}
1461
1da177e4
LT		 1462/*
1463 * OPEN_EXPIRED:
1464 * reclaim state on the server after a network partition.
1465 * Assumes caller holds the appropriate lock
1466 */
539cd03a 1467static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1468{
e56e0b78 1469 struct nfs4_opendata *opendata;
864472e9 1470 int ret;
1da177e4 1471
6f220ed5
TM		 1472 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1473 if (IS_ERR(opendata))
1474 return PTR_ERR(opendata);
864472e9 1475 ret = nfs4_open_recover(opendata, state);
35d05778 1476 if (ret == -ESTALE)
539cd03a 1477 d_drop(ctx->path.dentry);
c6d00e63 1478 nfs4_opendata_put(opendata);
864472e9 1479 return ret;
1da177e4
LT		 1480}
1481
539cd03a 1482static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1483{
539cd03a 1484 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1485 struct nfs4_exception exception = { };
1486 int err;
1487
1488 do {
539cd03a 1489 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1490 if (err != -NFS4ERR_DELAY)
1491 break;
1492 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1493 } while (exception.retry);
1494 return err;
1495}
1496
1da177e4
LT		 1497static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1498{
1da177e4 1499 struct nfs_open_context *ctx;
864472e9 1500 int ret;
1da177e4 1501
864472e9
TM		 1502 ctx = nfs4_state_find_open_context(state);
1503 if (IS_ERR(ctx))
1504 return PTR_ERR(ctx);
539cd03a 1505 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1506 put_nfs_open_context(ctx);
1507 return ret;
1da177e4
LT		 1508}
1509
aa53ed54
JL		 1510/*
1511 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1512 * fields corresponding to attributes that were used to store the verifier.
1513 * Make sure we clobber those fields in the later setattr call
1514 */
1515static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1516{
1517 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1518 !(sattr->ia_valid & ATTR_ATIME_SET))
1519 sattr->ia_valid |= ATTR_ATIME;
1520
1521 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1522 !(sattr->ia_valid & ATTR_MTIME_SET))
1523 sattr->ia_valid |= ATTR_MTIME;
1524}
1525
1da177e4 1526/*
24ac23ab 1527 * Returns a referenced nfs4_state
1da177e4 1528 */
dc0b027d 1529static 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		 1530{
1531 struct nfs4_state_owner *sp;
1532 struct nfs4_state *state = NULL;
1533 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1534 struct nfs4_opendata *opendata;
aac00a8d 1535 int status;
1da177e4
LT		 1536
1537 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1538 status = -ENOMEM;
1539 if (!(sp = nfs4_get_state_owner(server, cred))) {
1540 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1541 goto out_err;
1542 }
58d9714a
TM		 1543 status = nfs4_recover_expired_lease(server);
1544 if (status != 0)
b4454fe1 1545 goto err_put_state_owner;
aac00a8d 1546 if (path->dentry->d_inode != NULL)
dc0b027d 1547 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1548 status = -ENOMEM;
dc0b027d 1549 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1550 if (opendata == NULL)
95d35cb4 1551 goto err_put_state_owner;
1da177e4 1552
aac00a8d
TM		 1553 if (path->dentry->d_inode != NULL)
1554 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1555
24ac23ab 1556 status = _nfs4_proc_open(opendata);
1da177e4 1557 if (status != 0)
c6d00e63 1558 goto err_opendata_put;
1da177e4 1559
aa53ed54
JL		 1560 if (opendata->o_arg.open_flags & O_EXCL)
1561 nfs4_exclusive_attrset(opendata, sattr);
1562
24ac23ab 1563 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1564 status = PTR_ERR(state);
1565 if (IS_ERR(state))
c6d00e63 1566 goto err_opendata_put;
c6d00e63 1567 nfs4_opendata_put(opendata);
1da177e4 1568 nfs4_put_state_owner(sp);
1da177e4
LT		 1569 *res = state;
1570 return 0;
c6d00e63
TM		 1571err_opendata_put:
1572 nfs4_opendata_put(opendata);
e56e0b78
TM		 1573err_put_state_owner:
1574 nfs4_put_state_owner(sp);
1da177e4 1575out_err:
1da177e4
LT		 1576 *res = NULL;
1577 return status;
1578}
1579
1580
dc0b027d 1581static 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		 1582{
1583 struct nfs4_exception exception = { };
1584 struct nfs4_state *res;
1585 int status;
1586
1587 do {
dc0b027d 1588 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1589 if (status == 0)
1590 break;
1591 /* NOTE: BAD_SEQID means the server and client disagree about the
1592 * book-keeping w.r.t. state-changing operations
1593 * (OPEN/CLOSE/LOCK/LOCKU...)
1594 * It is actually a sign of a bug on the client or on the server.
1595 *
1596 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1597 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1598 * have unhashed the old state_owner for us, and that we can
1599 * therefore safely retry using a new one. We should still warn
1600 * the user though...
1601 */
1602 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1603 printk(KERN_WARNING "NFS: v4 server %s "
1604 " returned a bad sequence-id error!\n",
1605 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1606 exception.retry = 1;
1607 continue;
1608 }
550f5747
TM		 1609 /*
1610 * BAD_STATEID on OPEN means that the server cancelled our
1611 * state before it received the OPEN_CONFIRM.
1612 * Recover by retrying the request as per the discussion
1613 * on Page 181 of RFC3530.
1614 */
1615 if (status == -NFS4ERR_BAD_STATEID) {
1616 exception.retry = 1;
1617 continue;
1618 }
aac00a8d
TM		 1619 if (status == -EAGAIN) {
1620 /* We must have found a delegation */
1621 exception.retry = 1;
1622 continue;
1623 }
1da177e4
LT		 1624 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1625 status, &exception));
1626 } while (exception.retry);
1627 return res;
1628}
1629
659bfcd6
TM		 1630static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1631 struct nfs_fattr *fattr, struct iattr *sattr,
1632 struct nfs4_state *state)
1da177e4 1633{
3e4f6290 1634 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1635 struct nfs_setattrargs arg = {
3e4f6290 1636 .fh = NFS_FH(inode),
1da177e4
LT		 1637 .iap = sattr,
1638 .server = server,
1639 .bitmask = server->attr_bitmask,
1640 };
1641 struct nfs_setattrres res = {
1642 .fattr = fattr,
1643 .server = server,
1644 };
1645 struct rpc_message msg = {
659bfcd6
TM		 1646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1647 .rpc_argp = &arg,
1648 .rpc_resp = &res,
1649 .rpc_cred = cred,
1da177e4 1650 };
26e976a8 1651 unsigned long timestamp = jiffies;
65e4308d 1652 int status;
1da177e4 1653
0e574af1 1654 nfs_fattr_init(fattr);
1da177e4 1655
3e4f6290
TM		 1656 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1657 /* Use that stateid */
1658 } else if (state != NULL) {
08e9eac4
TM		 1659 nfs4_copy_stateid(&arg.stateid, state, current->files);
1660 } else
1da177e4
LT		 1661 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1662
cccef3b9 1663 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1664 if (status == 0 && state != NULL)
1665 renew_lease(server, timestamp);
65e4308d 1666 return status;
1da177e4
LT		 1667}
1668
659bfcd6
TM		 1669static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1670 struct nfs_fattr *fattr, struct iattr *sattr,
1671 struct nfs4_state *state)
1da177e4 1672{
3e4f6290 1673 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1674 struct nfs4_exception exception = { };
1675 int err;
1676 do {
1677 err = nfs4_handle_exception(server,
659bfcd6 1678 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1679 &exception);
1680 } while (exception.retry);
1681 return err;
1682}
1683
1684struct nfs4_closedata {
4a35bd41 1685 struct path path;
1da177e4
LT		 1686 struct inode *inode;
1687 struct nfs4_state *state;
1688 struct nfs_closeargs arg;
1689 struct nfs_closeres res;
516a6af6 1690 struct nfs_fattr fattr;
26e976a8 1691 unsigned long timestamp;
1da177e4
LT		 1692};
1693
963d8fe5 1694static void nfs4_free_closedata(void *data)
9512135d 1695{
963d8fe5
TM		 1696 struct nfs4_closedata *calldata = data;
1697 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1698
1699 nfs4_put_open_state(calldata->state);
1700 nfs_free_seqid(calldata->arg.seqid);
9512135d 1701 nfs4_put_state_owner(sp);
31f31db1 1702 path_put(&calldata->path);
9512135d
TM		 1703 kfree(calldata);
1704}
1705
963d8fe5 1706static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1707{
963d8fe5 1708 struct nfs4_closedata *calldata = data;
1da177e4 1709 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1710 struct nfs_server *server = NFS_SERVER(calldata->inode);
1711
19ddab06 1712 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1713 if (RPC_ASSASSINATED(task))
1714 return;
1da177e4
LT		 1715 /* hmm. we are done with the inode, and in the process of freeing
1716 * the state_owner. we keep this around to process errors
1717 */
1da177e4
LT		 1718 switch (task->tk_status) {
1719 case 0:
45328c35 1720 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1721 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1722 break;
1723 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1724 case -NFS4ERR_OLD_STATEID:
1725 case -NFS4ERR_BAD_STATEID:
1da177e4 1726 case -NFS4ERR_EXPIRED:
dc0b027d 1727 if (calldata->arg.fmode == 0)
9e33bed5 1728 break;
1da177e4 1729 default:
9e33bed5 1730 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1731 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1732 return;
1733 }
1734 }
19ddab06 1735 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1736 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1737}
1738
4ce70ada 1739static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1740{
4ce70ada 1741 struct nfs4_closedata *calldata = data;
9512135d 1742 struct nfs4_state *state = calldata->state;
003707c7 1743 int clear_rd, clear_wr, clear_rdwr;
9512135d 1744
963d8fe5 1745 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1746 return;
003707c7 1747
003707c7 1748 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1749 spin_lock(&state->owner->so_lock);
003707c7 1750 /* Calculate the change in open mode */
e7616923 1751 if (state->n_rdwr == 0) {
003707c7 1752 if (state->n_rdonly == 0) {
003707c7
TM		 1753 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1754 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1755 }
1756 if (state->n_wronly == 0) {
003707c7
TM		 1757 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1758 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1759 }
e7616923 1760 }
4cecb76f 1761 spin_unlock(&state->owner->so_lock);
003707c7 1762 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1763 /* Note: exit _without_ calling nfs4_close_done */
1764 task->tk_action = NULL;
9512135d
TM		 1765 return;
1766 }
516a6af6 1767 nfs_fattr_init(calldata->res.fattr);
45328c35 1768 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1769 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1770 calldata->arg.fmode = FMODE_READ;
45328c35 1771 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1772 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1773 calldata->arg.fmode = FMODE_WRITE;
45328c35 1774 }
26e976a8 1775 calldata->timestamp = jiffies;
19ddab06
AA		 1776 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1777 &calldata->arg.seq_args, &calldata->res.seq_res,
1778 1, task))
1779 return;
5138fde0 1780 rpc_call_start(task);
1da177e4
LT		 1781}
1782
963d8fe5 1783static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1784 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1785 .rpc_call_done = nfs4_close_done,
1786 .rpc_release = nfs4_free_closedata,
1787};
1788
1da177e4
LT		 1789/*
1790 * It is possible for data to be read/written from a mem-mapped file
1791 * after the sys_close call (which hits the vfs layer as a flush).
1792 * This means that we can't safely call nfsv4 close on a file until
1793 * the inode is cleared. This in turn means that we are not good
1794 * NFSv4 citizens - we do not indicate to the server to update the file's
1795 * share state even when we are done with one of the three share
1796 * stateid's in the inode.
1797 *
1798 * NOTE: Caller must be holding the sp->so_owner semaphore!
1799 */
a49c3c77 1800int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1801{
4a35bd41 1802 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1803 struct nfs4_closedata *calldata;
b39e625b
TM		 1804 struct nfs4_state_owner *sp = state->owner;
1805 struct rpc_task *task;
5138fde0
TM		 1806 struct rpc_message msg = {
1807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1808 .rpc_cred = state->owner->so_cred,
1809 };
c970aa85
TM		 1810 struct rpc_task_setup task_setup_data = {
1811 .rpc_client = server->client,
5138fde0 1812 .rpc_message = &msg,
c970aa85 1813 .callback_ops = &nfs4_close_ops,
101070ca 1814 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1815 .flags = RPC_TASK_ASYNC,
1816 };
9512135d 1817 int status = -ENOMEM;
1da177e4 1818
19ddab06 1819 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1820 if (calldata == NULL)
9512135d 1821 goto out;
4a35bd41 1822 calldata->inode = state->inode;
1da177e4 1823 calldata->state = state;
4a35bd41 1824 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1825 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1826 if (nfs4_has_session(server->nfs_client))
1827 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1828 /* Serialization for the sequence id */
cee54fc9 1829 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1830 if (calldata->arg.seqid == NULL)
1831 goto out_free_calldata;
dc0b027d 1832 calldata->arg.fmode = 0;
a65318bf 1833 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1834 calldata->res.fattr = &calldata->fattr;
c1d51931 1835 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1836 calldata->res.server = server;
5f7dbd5c 1837 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1838 calldata->path.mnt = mntget(path->mnt);
1839 calldata->path.dentry = dget(path->dentry);
9512135d 1840
5138fde0
TM		 1841 msg.rpc_argp = &calldata->arg,
1842 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1843 task_setup_data.callback_data = calldata;
1844 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1845 if (IS_ERR(task))
1846 return PTR_ERR(task);
a49c3c77
TM		 1847 status = 0;
1848 if (wait)
1849 status = rpc_wait_for_completion_task(task);
b39e625b 1850 rpc_put_task(task);
a49c3c77 1851 return status;
9512135d
TM		 1852out_free_calldata:
1853 kfree(calldata);
1854out:
b39e625b
TM		 1855 nfs4_put_open_state(state);
1856 nfs4_put_state_owner(sp);
9512135d 1857 return status;
1da177e4
LT		 1858}
1859
dc0b027d 1860static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1861{
1862 struct file *filp;
1b45c46c 1863 int ret;
02a913a7 1864
1b45c46c 1865 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1866 if (fmode & FMODE_EXEC) {
af22f94a 1867 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1868 state->owner->so_cred,
1869 nd->intent.open.flags);
1870 if (ret < 0)
1871 goto out_close;
1872 }
4a35bd41 1873 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1874 if (!IS_ERR(filp)) {
1875 struct nfs_open_context *ctx;
cd3758e3 1876 ctx = nfs_file_open_context(filp);
02a913a7 1877 ctx->state = state;
95cf959b
TM		 1878 return 0;
1879 }
1b45c46c
TM		 1880 ret = PTR_ERR(filp);
1881out_close:
dc0b027d 1882 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1883 return ret;
02a913a7
TM		 1884}
1885
1886struct dentry *
1da177e4
LT		 1887nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1888{
ad389da7 1889 struct path path = {
4ac91378 1890 .mnt = nd->path.mnt,
ad389da7
TM		 1891 .dentry = dentry,
1892 };
4ac91378 1893 struct dentry *parent;
1da177e4
LT		 1894 struct iattr attr;
1895 struct rpc_cred *cred;
1896 struct nfs4_state *state;
02a913a7 1897 struct dentry *res;
dc0b027d 1898 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1899
1900 if (nd->flags & LOOKUP_CREATE) {
1901 attr.ia_mode = nd->intent.open.create_mode;
1902 attr.ia_valid = ATTR_MODE;
1903 if (!IS_POSIXACL(dir))
ce3b0f8d 1904 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1905 } else {
1906 attr.ia_valid = 0;
1907 BUG_ON(nd->intent.open.flags & O_CREAT);
1908 }
1909
98a8e323 1910 cred = rpc_lookup_cred();
1da177e4 1911 if (IS_ERR(cred))
02a913a7 1912 return (struct dentry *)cred;
565277f6
TM		 1913 parent = dentry->d_parent;
1914 /* Protect against concurrent sillydeletes */
1915 nfs_block_sillyrename(parent);
dc0b027d 1916 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1917 put_rpccred(cred);
02a913a7 1918 if (IS_ERR(state)) {
d75340cc 1919 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1920 d_add(dentry, NULL);
d75340cc
TM		 1921 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1922 }
565277f6 1923 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1924 return (struct dentry *)state;
1925 }
24ac23ab 1926 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1927 if (res != NULL)
deee9369 1928 path.dentry = res;
d75340cc 1929 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1930 nfs_unblock_sillyrename(parent);
dc0b027d 1931 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1932 return res;
1da177e4
LT		 1933}
1934
1935int
02a913a7 1936nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1937{
ad389da7 1938 struct path path = {
4ac91378 1939 .mnt = nd->path.mnt,
ad389da7
TM		 1940 .dentry = dentry,
1941 };
1da177e4
LT		 1942 struct rpc_cred *cred;
1943 struct nfs4_state *state;
dc0b027d 1944 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1945
98a8e323 1946 cred = rpc_lookup_cred();
1da177e4
LT		 1947 if (IS_ERR(cred))
1948 return PTR_ERR(cred);
dc0b027d 1949 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1950 put_rpccred(cred);
02a913a7
TM		 1951 if (IS_ERR(state)) {
1952 switch (PTR_ERR(state)) {
1953 case -EPERM:
1954 case -EACCES:
1955 case -EDQUOT:
1956 case -ENOSPC:
1957 case -EROFS:
1958 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1959 return 1;
b87c0adf
CL		 1960 default:
1961 goto out_drop;
02a913a7 1962 }
02a913a7 1963 }
24ac23ab 1964 if (state->inode == dentry->d_inode) {
d75340cc 1965 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1966 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1967 return 1;
1968 }
dc0b027d 1969 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1970out_drop:
1971 d_drop(dentry);
1da177e4
LT		 1972 return 0;
1973}
1974
7fe5c398
TM		 1975void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1976{
1977 if (ctx->state == NULL)
1978 return;
1979 if (is_sync)
1980 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1981 else
1982 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1983}
1da177e4
LT		 1984
1985static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1986{
43652ad5
BH		 1987 struct nfs4_server_caps_arg args = {
1988 .fhandle = fhandle,
1989 };
1da177e4
LT		 1990 struct nfs4_server_caps_res res = {};
1991 struct rpc_message msg = {
1992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1993 .rpc_argp = &args,
1da177e4
LT		 1994 .rpc_resp = &res,
1995 };
1996 int status;
1997
cccef3b9 1998 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1999 if (status == 0) {
2000 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2001 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2002 server->caps |= NFS_CAP_ACLS;
2003 if (res.has_links != 0)
2004 server->caps |= NFS_CAP_HARDLINKS;
2005 if (res.has_symlinks != 0)
2006 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 2007 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2008 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2009 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2010 server->acl_bitmask = res.acl_bitmask;
2011 }
cccef3b9 2012
1da177e4
LT		 2013 return status;
2014}
2015
55a97593 2016int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2017{
2018 struct nfs4_exception exception = { };
2019 int err;
2020 do {
2021 err = nfs4_handle_exception(server,
2022 _nfs4_server_capabilities(server, fhandle),
2023 &exception);
2024 } while (exception.retry);
2025 return err;
2026}
2027
2028static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2029 struct nfs_fsinfo *info)
2030{
1da177e4
LT		 2031 struct nfs4_lookup_root_arg args = {
2032 .bitmask = nfs4_fattr_bitmap,
2033 };
2034 struct nfs4_lookup_res res = {
2035 .server = server,
0e574af1 2036 .fattr = info->fattr,
1da177e4
LT		 2037 .fh = fhandle,
2038 };
2039 struct rpc_message msg = {
2040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2041 .rpc_argp = &args,
2042 .rpc_resp = &res,
2043 };
008f55d0
BH		 2044 int status;
2045
0e574af1 2046 nfs_fattr_init(info->fattr);
008f55d0
BH		 2047 status = nfs4_recover_expired_lease(server);
2048 if (!status)
2049 status = nfs4_check_client_ready(server->nfs_client);
2050 if (!status)
2051 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2052 return status;
1da177e4
LT		 2053}
2054
2055static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2056 struct nfs_fsinfo *info)
2057{
2058 struct nfs4_exception exception = { };
2059 int err;
2060 do {
2061 err = nfs4_handle_exception(server,
2062 _nfs4_lookup_root(server, fhandle, info),
2063 &exception);
2064 } while (exception.retry);
2065 return err;
2066}
2067
54ceac45
DH		 2068/*
2069 * get the file handle for the "/" directory on the server
2070 */
1da177e4 2071static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2072 struct nfs_fsinfo *info)
1da177e4 2073{
1da177e4
LT		 2074 int status;
2075
1da177e4 2076 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2077 if (status == 0)
2078 status = nfs4_server_capabilities(server, fhandle);
2079 if (status == 0)
2080 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2081 return nfs4_map_errors(status);
1da177e4
LT		 2082}
2083
6b97fd3d
MN		 2084/*
2085 * Get locations and (maybe) other attributes of a referral.
2086 * Note that we'll actually follow the referral later when
2087 * we detect fsid mismatch in inode revalidation
2088 */
56659e99 2089static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2090{
2091 int status = -ENOMEM;
2092 struct page *page = NULL;
2093 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2094
2095 page = alloc_page(GFP_KERNEL);
2096 if (page == NULL)
2097 goto out;
2098 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2099 if (locations == NULL)
2100 goto out;
2101
c228fd3a 2102 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2103 if (status != 0)
2104 goto out;
2105 /* Make sure server returned a different fsid for the referral */
2106 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2107 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2108 status = -EIO;
2109 goto out;
2110 }
2111
2112 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2113 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2114 if (!fattr->mode)
2115 fattr->mode = S_IFDIR;
2116 memset(fhandle, 0, sizeof(struct nfs_fh));
2117out:
2118 if (page)
2119 __free_page(page);
2120 if (locations)
2121 kfree(locations);
2122 return status;
2123}
2124
1da177e4
LT		 2125static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2126{
2127 struct nfs4_getattr_arg args = {
2128 .fh = fhandle,
2129 .bitmask = server->attr_bitmask,
2130 };
2131 struct nfs4_getattr_res res = {
2132 .fattr = fattr,
2133 .server = server,
2134 };
2135 struct rpc_message msg = {
2136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2137 .rpc_argp = &args,
2138 .rpc_resp = &res,
2139 };
2140
0e574af1 2141 nfs_fattr_init(fattr);
cccef3b9 2142 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2143}
2144
2145static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2146{
2147 struct nfs4_exception exception = { };
2148 int err;
2149 do {
2150 err = nfs4_handle_exception(server,
2151 _nfs4_proc_getattr(server, fhandle, fattr),
2152 &exception);
2153 } while (exception.retry);
2154 return err;
2155}
2156
2157/*
2158 * The file is not closed if it is opened due to the a request to change
2159 * the size of the file. The open call will not be needed once the
2160 * VFS layer lookup-intents are implemented.
2161 *
2162 * Close is called when the inode is destroyed.
2163 * If we haven't opened the file for O_WRONLY, we
2164 * need to in the size_change case to obtain a stateid.
2165 *
2166 * Got race?
2167 * Because OPEN is always done by name in nfsv4, it is
2168 * possible that we opened a different file by the same
2169 * name. We can recognize this race condition, but we
2170 * can't do anything about it besides returning an error.
2171 *
2172 * This will be fixed with VFS changes (lookup-intent).
2173 */
2174static int
2175nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2176 struct iattr *sattr)
2177{
08e9eac4 2178 struct inode *inode = dentry->d_inode;
659bfcd6 2179 struct rpc_cred *cred = NULL;
d530838b 2180 struct nfs4_state *state = NULL;
1da177e4
LT		 2181 int status;
2182
0e574af1 2183 nfs_fattr_init(fattr);
1da177e4 2184
d530838b 2185 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2186 if (sattr->ia_valid & ATTR_FILE) {
2187 struct nfs_open_context *ctx;
2188
2189 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2190 if (ctx) {
2191 cred = ctx->cred;
2192 state = ctx->state;
2193 }
659bfcd6 2194 }
08e9eac4 2195
659bfcd6 2196 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2197 if (status == 0)
2198 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2199 return status;
2200}
2201
56659e99
TM		 2202static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2203 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2204 struct nfs_fattr *fattr)
2205{
2206 int status;
2207 struct nfs4_lookup_arg args = {
2208 .bitmask = server->attr_bitmask,
2209 .dir_fh = dirfh,
2210 .name = name,
2211 };
2212 struct nfs4_lookup_res res = {
2213 .server = server,
2214 .fattr = fattr,
2215 .fh = fhandle,
2216 };
2217 struct rpc_message msg = {
2218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2219 .rpc_argp = &args,
2220 .rpc_resp = &res,
2221 };
2222
2223 nfs_fattr_init(fattr);
2224
2225 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2226 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2227 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2228 return status;
2229}
2230
2231static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2232 struct qstr *name, struct nfs_fh *fhandle,
2233 struct nfs_fattr *fattr)
2234{
2235 struct nfs4_exception exception = { };
2236 int err;
2237 do {
4e56e082
TM		 2238 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2239 /* FIXME: !!!! */
2240 if (err == -NFS4ERR_MOVED) {
2241 err = -EREMOTE;
2242 break;
2243 }
2244 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2245 } while (exception.retry);
2246 return err;
2247}
2248
56659e99 2249static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2250 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2251{
4e56e082 2252 int status;
1da177e4
LT		 2253
2254 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2255 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2256 if (status == -NFS4ERR_MOVED)
2257 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2258 dprintk("NFS reply lookup: %d\n", status);
2259 return status;
2260}
2261
2262static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2263{
2264 struct nfs4_exception exception = { };
2265 int err;
2266 do {
2267 err = nfs4_handle_exception(NFS_SERVER(dir),
2268 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2269 &exception);
2270 } while (exception.retry);
2271 return err;
2272}
2273
2274static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2275{
76b32999
TM		 2276 struct nfs_server *server = NFS_SERVER(inode);
2277 struct nfs_fattr fattr;
1da177e4
LT		 2278 struct nfs4_accessargs args = {
2279 .fh = NFS_FH(inode),
76b32999
TM		 2280 .bitmask = server->attr_bitmask,
2281 };
2282 struct nfs4_accessres res = {
2283 .server = server,
2284 .fattr = &fattr,
1da177e4 2285 };
1da177e4
LT		 2286 struct rpc_message msg = {
2287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2288 .rpc_argp = &args,
2289 .rpc_resp = &res,
2290 .rpc_cred = entry->cred,
2291 };
2292 int mode = entry->mask;
2293 int status;
2294
2295 /*
2296 * Determine which access bits we want to ask for...
2297 */
2298 if (mode & MAY_READ)
2299 args.access |= NFS4_ACCESS_READ;
2300 if (S_ISDIR(inode->i_mode)) {
2301 if (mode & MAY_WRITE)
2302 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2303 if (mode & MAY_EXEC)
2304 args.access |= NFS4_ACCESS_LOOKUP;
2305 } else {
2306 if (mode & MAY_WRITE)
2307 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2308 if (mode & MAY_EXEC)
2309 args.access |= NFS4_ACCESS_EXECUTE;
2310 }
76b32999 2311 nfs_fattr_init(&fattr);
cccef3b9 2312 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2313 if (!status) {
2314 entry->mask = 0;
2315 if (res.access & NFS4_ACCESS_READ)
2316 entry->mask |= MAY_READ;
2317 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2318 entry->mask |= MAY_WRITE;
2319 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2320 entry->mask |= MAY_EXEC;
76b32999 2321 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2322 }
2323 return status;
2324}
2325
2326static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2327{
2328 struct nfs4_exception exception = { };
2329 int err;
2330 do {
2331 err = nfs4_handle_exception(NFS_SERVER(inode),
2332 _nfs4_proc_access(inode, entry),
2333 &exception);
2334 } while (exception.retry);
2335 return err;
2336}
2337
2338/*
2339 * TODO: For the time being, we don't try to get any attributes
2340 * along with any of the zero-copy operations READ, READDIR,
2341 * READLINK, WRITE.
2342 *
2343 * In the case of the first three, we want to put the GETATTR
2344 * after the read-type operation -- this is because it is hard
2345 * to predict the length of a GETATTR response in v4, and thus
2346 * align the READ data correctly. This means that the GETATTR
2347 * may end up partially falling into the page cache, and we should
2348 * shift it into the 'tail' of the xdr_buf before processing.
2349 * To do this efficiently, we need to know the total length
2350 * of data received, which doesn't seem to be available outside
2351 * of the RPC layer.
2352 *
2353 * In the case of WRITE, we also want to put the GETATTR after
2354 * the operation -- in this case because we want to make sure
2355 * we get the post-operation mtime and size. This means that
2356 * we can't use xdr_encode_pages() as written: we need a variant
2357 * of it which would leave room in the 'tail' iovec.
2358 *
2359 * Both of these changes to the XDR layer would in fact be quite
2360 * minor, but I decided to leave them for a subsequent patch.
2361 */
2362static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2363 unsigned int pgbase, unsigned int pglen)
2364{
2365 struct nfs4_readlink args = {
2366 .fh = NFS_FH(inode),
2367 .pgbase = pgbase,
2368 .pglen = pglen,
2369 .pages = &page,
2370 };
f50c7000 2371 struct nfs4_readlink_res res;
1da177e4
LT		 2372 struct rpc_message msg = {
2373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2374 .rpc_argp = &args,
f50c7000 2375 .rpc_resp = &res,
1da177e4
LT		 2376 };
2377
cccef3b9 2378 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2379}
2380
2381static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2382 unsigned int pgbase, unsigned int pglen)
2383{
2384 struct nfs4_exception exception = { };
2385 int err;
2386 do {
2387 err = nfs4_handle_exception(NFS_SERVER(inode),
2388 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2389 &exception);
2390 } while (exception.retry);
2391 return err;
2392}
2393
1da177e4
LT		 2394/*
2395 * Got race?
2396 * We will need to arrange for the VFS layer to provide an atomic open.
2397 * Until then, this create/open method is prone to inefficiency and race
2398 * conditions due to the lookup, create, and open VFS calls from sys_open()
2399 * placed on the wire.
2400 *
2401 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2402 * The file will be opened again in the subsequent VFS open call
2403 * (nfs4_proc_file_open).
2404 *
2405 * The open for read will just hang around to be used by any process that
2406 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2407 */
2408
2409static int
2410nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2411 int flags, struct nameidata *nd)
1da177e4 2412{
ad389da7 2413 struct path path = {
4ac91378 2414 .mnt = nd->path.mnt,
ad389da7
TM		 2415 .dentry = dentry,
2416 };
1da177e4
LT		 2417 struct nfs4_state *state;
2418 struct rpc_cred *cred;
dc0b027d 2419 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2420 int status = 0;
2421
98a8e323 2422 cred = rpc_lookup_cred();
1da177e4
LT		 2423 if (IS_ERR(cred)) {
2424 status = PTR_ERR(cred);
2425 goto out;
2426 }
dc0b027d 2427 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2428 d_drop(dentry);
1da177e4
LT		 2429 if (IS_ERR(state)) {
2430 status = PTR_ERR(state);
659bfcd6 2431 goto out_putcred;
1da177e4 2432 }
d4d9cdcb 2433 d_add(dentry, igrab(state->inode));
d75340cc 2434 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2435 if (flags & O_EXCL) {
2436 struct nfs_fattr fattr;
659bfcd6 2437 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2438 if (status == 0)
65e4308d 2439 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2440 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2441 }
ad389da7 2442 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2443 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2444 else
dc0b027d 2445 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2446out_putcred:
2447 put_rpccred(cred);
1da177e4
LT		 2448out:
2449 return status;
2450}
2451
2452static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2453{
16e42959 2454 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2455 struct nfs_removeargs args = {
1da177e4 2456 .fh = NFS_FH(dir),
4fdc17b2
TM		 2457 .name.len = name->len,
2458 .name.name = name->name,
16e42959
TM		 2459 .bitmask = server->attr_bitmask,
2460 };
4fdc17b2 2461 struct nfs_removeres res = {
16e42959 2462 .server = server,
1da177e4 2463 };
1da177e4 2464 struct rpc_message msg = {
4fdc17b2
TM		 2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2466 .rpc_argp = &args,
2467 .rpc_resp = &res,
1da177e4
LT		 2468 };
2469 int status;
2470
4fdc17b2 2471 nfs_fattr_init(&res.dir_attr);
cccef3b9 2472 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2473 if (status == 0) {
2474 update_changeattr(dir, &res.cinfo);
4fdc17b2 2475 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2476 }
1da177e4
LT		 2477 return status;
2478}
2479
2480static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2481{
2482 struct nfs4_exception exception = { };
2483 int err;
2484 do {
2485 err = nfs4_handle_exception(NFS_SERVER(dir),
2486 _nfs4_proc_remove(dir, name),
2487 &exception);
2488 } while (exception.retry);
2489 return err;
2490}
2491
e4eff1a6 2492static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2493{
e4eff1a6
TM		 2494 struct nfs_server *server = NFS_SERVER(dir);
2495 struct nfs_removeargs *args = msg->rpc_argp;
2496 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2497
a65318bf 2498 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2499 res->server = server;
1da177e4 2500 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2501}
2502
e4eff1a6 2503static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2504{
e4eff1a6
TM		 2505 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2506
472cfbd9 2507 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2508 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2509 return 0;
472cfbd9 2510 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2511 update_changeattr(dir, &res->cinfo);
2512 nfs_post_op_update_inode(dir, &res->dir_attr);
2513 return 1;
1da177e4
LT		 2514}
2515
2516static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2517 struct inode *new_dir, struct qstr *new_name)
2518{
6caf2c82 2519 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2520 struct nfs4_rename_arg arg = {
2521 .old_dir = NFS_FH(old_dir),
2522 .new_dir = NFS_FH(new_dir),
2523 .old_name = old_name,
2524 .new_name = new_name,
6caf2c82
TM		 2525 .bitmask = server->attr_bitmask,
2526 };
2527 struct nfs_fattr old_fattr, new_fattr;
2528 struct nfs4_rename_res res = {
2529 .server = server,
2530 .old_fattr = &old_fattr,
2531 .new_fattr = &new_fattr,
1da177e4 2532 };
1da177e4
LT		 2533 struct rpc_message msg = {
2534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2535 .rpc_argp = &arg,
2536 .rpc_resp = &res,
2537 };
2538 int status;
2539
6caf2c82
TM		 2540 nfs_fattr_init(res.old_fattr);
2541 nfs_fattr_init(res.new_fattr);
cccef3b9 2542 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2543
2544 if (!status) {
2545 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2546 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2547 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2548 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2549 }
2550 return status;
2551}
2552
2553static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2554 struct inode *new_dir, struct qstr *new_name)
2555{
2556 struct nfs4_exception exception = { };
2557 int err;
2558 do {
2559 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2560 _nfs4_proc_rename(old_dir, old_name,
2561 new_dir, new_name),
2562 &exception);
2563 } while (exception.retry);
2564 return err;
2565}
2566
2567static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2568{
91ba2eee 2569 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2570 struct nfs4_link_arg arg = {
2571 .fh = NFS_FH(inode),
2572 .dir_fh = NFS_FH(dir),
2573 .name = name,
91ba2eee
TM		 2574 .bitmask = server->attr_bitmask,
2575 };
2576 struct nfs_fattr fattr, dir_attr;
2577 struct nfs4_link_res res = {
2578 .server = server,
2579 .fattr = &fattr,
2580 .dir_attr = &dir_attr,
1da177e4 2581 };
1da177e4
LT		 2582 struct rpc_message msg = {
2583 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2584 .rpc_argp = &arg,
91ba2eee 2585 .rpc_resp = &res,
1da177e4
LT		 2586 };
2587 int status;
2588
91ba2eee
TM		 2589 nfs_fattr_init(res.fattr);
2590 nfs_fattr_init(res.dir_attr);
cccef3b9 2591 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2592 if (!status) {
2593 update_changeattr(dir, &res.cinfo);
2594 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2595 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2596 }
1da177e4
LT		 2597
2598 return status;
2599}
2600
2601static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2602{
2603 struct nfs4_exception exception = { };
2604 int err;
2605 do {
2606 err = nfs4_handle_exception(NFS_SERVER(inode),
2607 _nfs4_proc_link(inode, dir, name),
2608 &exception);
2609 } while (exception.retry);
2610 return err;
2611}
2612
57dc9a57
TM		 2613struct nfs4_createdata {
2614 struct rpc_message msg;
2615 struct nfs4_create_arg arg;
2616 struct nfs4_create_res res;
2617 struct nfs_fh fh;
2618 struct nfs_fattr fattr;
2619 struct nfs_fattr dir_fattr;
2620};
2621
2622static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2623 struct qstr *name, struct iattr *sattr, u32 ftype)
2624{
2625 struct nfs4_createdata *data;
2626
2627 data = kzalloc(sizeof(*data), GFP_KERNEL);
2628 if (data != NULL) {
2629 struct nfs_server *server = NFS_SERVER(dir);
2630
2631 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2632 data->msg.rpc_argp = &data->arg;
2633 data->msg.rpc_resp = &data->res;
2634 data->arg.dir_fh = NFS_FH(dir);
2635 data->arg.server = server;
2636 data->arg.name = name;
2637 data->arg.attrs = sattr;
2638 data->arg.ftype = ftype;
2639 data->arg.bitmask = server->attr_bitmask;
2640 data->res.server = server;
2641 data->res.fh = &data->fh;
2642 data->res.fattr = &data->fattr;
2643 data->res.dir_fattr = &data->dir_fattr;
2644 nfs_fattr_init(data->res.fattr);
2645 nfs_fattr_init(data->res.dir_fattr);
2646 }
2647 return data;
2648}
2649
2650static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2651{
cccef3b9
AA		 2652 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2653 &data->arg, &data->res, 1);
57dc9a57
TM		 2654 if (status == 0) {
2655 update_changeattr(dir, &data->res.dir_cinfo);
2656 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2657 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2658 }
2659 return status;
2660}
2661
2662static void nfs4_free_createdata(struct nfs4_createdata *data)
2663{
2664 kfree(data);
2665}
2666
4f390c15 2667static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2668 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2669{
57dc9a57
TM		 2670 struct nfs4_createdata *data;
2671 int status = -ENAMETOOLONG;
1da177e4 2672
94a6d753 2673 if (len > NFS4_MAXPATHLEN)
57dc9a57 2674 goto out;
4f390c15 2675
57dc9a57
TM		 2676 status = -ENOMEM;
2677 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2678 if (data == NULL)
2679 goto out;
2680
2681 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2682 data->arg.u.symlink.pages = &page;
2683 data->arg.u.symlink.len = len;
1da177e4 2684
57dc9a57
TM		 2685 status = nfs4_do_create(dir, dentry, data);
2686
2687 nfs4_free_createdata(data);
2688out:
1da177e4
LT		 2689 return status;
2690}
2691
4f390c15 2692static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2693 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2694{
2695 struct nfs4_exception exception = { };
2696 int err;
2697 do {
2698 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2699 _nfs4_proc_symlink(dir, dentry, page,
2700 len, sattr),
1da177e4
LT		 2701 &exception);
2702 } while (exception.retry);
2703 return err;
2704}
2705
2706static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2707 struct iattr *sattr)
2708{
57dc9a57
TM		 2709 struct nfs4_createdata *data;
2710 int status = -ENOMEM;
1da177e4 2711
57dc9a57
TM		 2712 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2713 if (data == NULL)
2714 goto out;
2715
2716 status = nfs4_do_create(dir, dentry, data);
2717
2718 nfs4_free_createdata(data);
2719out:
1da177e4
LT		 2720 return status;
2721}
2722
2723static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2724 struct iattr *sattr)
2725{
2726 struct nfs4_exception exception = { };
2727 int err;
2728 do {
2729 err = nfs4_handle_exception(NFS_SERVER(dir),
2730 _nfs4_proc_mkdir(dir, dentry, sattr),
2731 &exception);
2732 } while (exception.retry);
2733 return err;
2734}
2735
2736static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2737 u64 cookie, struct page *page, unsigned int count, int plus)
2738{
2739 struct inode *dir = dentry->d_inode;
2740 struct nfs4_readdir_arg args = {
2741 .fh = NFS_FH(dir),
2742 .pages = &page,
2743 .pgbase = 0,
2744 .count = count,
a65318bf 2745 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2746 };
2747 struct nfs4_readdir_res res;
2748 struct rpc_message msg = {
2749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2750 .rpc_argp = &args,
2751 .rpc_resp = &res,
2752 .rpc_cred = cred,
2753 };
2754 int status;
2755
3110ff80 2756 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2757 dentry->d_parent->d_name.name,
2758 dentry->d_name.name,
2759 (unsigned long long)cookie);
1da177e4
LT		 2760 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2761 res.pgbase = args.pgbase;
cccef3b9 2762 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2763 if (status == 0)
2764 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2765
2766 nfs_invalidate_atime(dir);
2767
3110ff80 2768 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2769 return status;
2770}
2771
2772static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2773 u64 cookie, struct page *page, unsigned int count, int plus)
2774{
2775 struct nfs4_exception exception = { };
2776 int err;
2777 do {
2778 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2779 _nfs4_proc_readdir(dentry, cred, cookie,
2780 page, count, plus),
2781 &exception);
2782 } while (exception.retry);
2783 return err;
2784}
2785
2786static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2787 struct iattr *sattr, dev_t rdev)
2788{
57dc9a57
TM		 2789 struct nfs4_createdata *data;
2790 int mode = sattr->ia_mode;
2791 int status = -ENOMEM;
1da177e4
LT		 2792
2793 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2794 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2795
2796 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2797 if (data == NULL)
2798 goto out;
2799
1da177e4 2800 if (S_ISFIFO(mode))
57dc9a57 2801 data->arg.ftype = NF4FIFO;
1da177e4 2802 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2803 data->arg.ftype = NF4BLK;
2804 data->arg.u.device.specdata1 = MAJOR(rdev);
2805 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2806 }
2807 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2808 data->arg.ftype = NF4CHR;
2809 data->arg.u.device.specdata1 = MAJOR(rdev);
2810 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2811 }
1da177e4 2812
57dc9a57
TM		 2813 status = nfs4_do_create(dir, dentry, data);
2814
2815 nfs4_free_createdata(data);
2816out:
1da177e4
LT		 2817 return status;
2818}
2819
2820static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2821 struct iattr *sattr, dev_t rdev)
2822{
2823 struct nfs4_exception exception = { };
2824 int err;
2825 do {
2826 err = nfs4_handle_exception(NFS_SERVER(dir),
2827 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2828 &exception);
2829 } while (exception.retry);
2830 return err;
2831}
2832
2833static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2834 struct nfs_fsstat *fsstat)
2835{
2836 struct nfs4_statfs_arg args = {
2837 .fh = fhandle,
2838 .bitmask = server->attr_bitmask,
2839 };
24ad148a
BH		 2840 struct nfs4_statfs_res res = {
2841 .fsstat = fsstat,
2842 };
1da177e4
LT		 2843 struct rpc_message msg = {
2844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2845 .rpc_argp = &args,
24ad148a 2846 .rpc_resp = &res,
1da177e4
LT		 2847 };
2848
0e574af1 2849 nfs_fattr_init(fsstat->fattr);
cccef3b9 2850 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2851}
2852
2853static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2854{
2855 struct nfs4_exception exception = { };
2856 int err;
2857 do {
2858 err = nfs4_handle_exception(server,
2859 _nfs4_proc_statfs(server, fhandle, fsstat),
2860 &exception);
2861 } while (exception.retry);
2862 return err;
2863}
2864
2865static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2866 struct nfs_fsinfo *fsinfo)
2867{
2868 struct nfs4_fsinfo_arg args = {
2869 .fh = fhandle,
2870 .bitmask = server->attr_bitmask,
2871 };
3dda5e43
BH		 2872 struct nfs4_fsinfo_res res = {
2873 .fsinfo = fsinfo,
2874 };
1da177e4
LT		 2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2877 .rpc_argp = &args,
3dda5e43 2878 .rpc_resp = &res,
1da177e4
LT		 2879 };
2880
cccef3b9 2881 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2882}
2883
2884static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2885{
2886 struct nfs4_exception exception = { };
2887 int err;
2888
2889 do {
2890 err = nfs4_handle_exception(server,
2891 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2898{
0e574af1 2899 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2900 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2901}
2902
2903static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2904 struct nfs_pathconf *pathconf)
2905{
2906 struct nfs4_pathconf_arg args = {
2907 .fh = fhandle,
2908 .bitmask = server->attr_bitmask,
2909 };
d45b2989
BH		 2910 struct nfs4_pathconf_res res = {
2911 .pathconf = pathconf,
2912 };
1da177e4
LT		 2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2915 .rpc_argp = &args,
d45b2989 2916 .rpc_resp = &res,
1da177e4
LT		 2917 };
2918
2919 /* None of the pathconf attributes are mandatory to implement */
2920 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2921 memset(pathconf, 0, sizeof(*pathconf));
2922 return 0;
2923 }
2924
0e574af1 2925 nfs_fattr_init(pathconf->fattr);
cccef3b9 2926 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2927}
2928
2929static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_pathconf *pathconf)
2931{
2932 struct nfs4_exception exception = { };
2933 int err;
2934
2935 do {
2936 err = nfs4_handle_exception(server,
2937 _nfs4_proc_pathconf(server, fhandle, pathconf),
2938 &exception);
2939 } while (exception.retry);
2940 return err;
2941}
2942
ec06c096 2943static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2944{
ec06c096 2945 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2946
f11c88af
AA		 2947 dprintk("--> %s\n", __func__);
2948
2949 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2950 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2951
9e33bed5 2952 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2953 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2954 return -EAGAIN;
1da177e4 2955 }
8850df99
TM		 2956
2957 nfs_invalidate_atime(data->inode);
1da177e4 2958 if (task->tk_status > 0)
ec06c096
TM		 2959 renew_lease(server, data->timestamp);
2960 return 0;
1da177e4
LT		 2961}
2962
bdc7f021 2963static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2964{
1da177e4 2965 data->timestamp = jiffies;
bdc7f021 2966 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2967}
2968
788e7a89 2969static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2970{
1da177e4
LT		 2971 struct inode *inode = data->inode;
2972
def6ed7e
AA		 2973 /* slot is freed in nfs_writeback_done */
2974 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2975 task->tk_status);
2976
9e33bed5 2977 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2978 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2979 return -EAGAIN;
1da177e4 2980 }
4f9838c7 2981 if (task->tk_status >= 0) {
1da177e4 2982 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2983 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2984 }
788e7a89 2985 return 0;
1da177e4
LT		 2986}
2987
bdc7f021 2988static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2989{
bdc7f021
TM		 2990 struct nfs_server *server = NFS_SERVER(data->inode);
2991
a65318bf 2992 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2993 data->res.server = server;
1da177e4
LT		 2994 data->timestamp = jiffies;
2995
bdc7f021 2996 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2997}
2998
788e7a89 2999static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3000{
1da177e4
LT		 3001 struct inode *inode = data->inode;
3002
21d9a851
AA		 3003 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3004 task->tk_status);
9e33bed5 3005 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 3006 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3007 return -EAGAIN;
1da177e4 3008 }
21d9a851
AA		 3009 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3010 &data->res.seq_res);
9e08a3c5 3011 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3012 return 0;
1da177e4
LT		 3013}
3014
bdc7f021 3015static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3016{
788e7a89 3017 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3018
a65318bf 3019 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3020 data->res.server = server;
bdc7f021 3021 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3022}
3023
3024/*
3025 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3026 * standalone procedure for queueing an asynchronous RENEW.
3027 */
963d8fe5 3028static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3029{
adfa6f98 3030 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3031 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3032
3033 if (task->tk_status < 0) {
95baa25c
TM		 3034 /* Unless we're shutting down, schedule state recovery! */
3035 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3036 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3037 return;
3038 }
3039 spin_lock(&clp->cl_lock);
3040 if (time_before(clp->cl_last_renewal,timestamp))
3041 clp->cl_last_renewal = timestamp;
3042 spin_unlock(&clp->cl_lock);
29fba38b
BH		 3043 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3044 task->tk_msg.rpc_cred);
3045 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT		 3046}
3047
963d8fe5
TM		 3048static const struct rpc_call_ops nfs4_renew_ops = {
3049 .rpc_call_done = nfs4_renew_done,
3050};
3051
adfa6f98 3052int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3053{
3054 struct rpc_message msg = {
3055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3056 .rpc_argp = clp,
b4454fe1 3057 .rpc_cred = cred,
1da177e4
LT		 3058 };
3059
3060 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3061 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3062}
3063
adfa6f98 3064int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3065{
3066 struct rpc_message msg = {
3067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3068 .rpc_argp = clp,
b4454fe1 3069 .rpc_cred = cred,
1da177e4
LT		 3070 };
3071 unsigned long now = jiffies;
3072 int status;
3073
3074 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3075 if (status < 0)
3076 return status;
3077 spin_lock(&clp->cl_lock);
3078 if (time_before(clp->cl_last_renewal,now))
3079 clp->cl_last_renewal = now;
3080 spin_unlock(&clp->cl_lock);
3081 return 0;
3082}
3083
aa1870af
BF		 3084static inline int nfs4_server_supports_acls(struct nfs_server *server)
3085{
3086 return (server->caps & NFS_CAP_ACLS)
3087 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3088 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3089}
3090
3091/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3092 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3093 * the stack.
3094 */
3095#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3096
3097static void buf_to_pages(const void *buf, size_t buflen,
3098 struct page **pages, unsigned int *pgbase)
3099{
3100 const void *p = buf;
3101
3102 *pgbase = offset_in_page(buf);
3103 p -= *pgbase;
3104 while (p < buf + buflen) {
3105 *(pages++) = virt_to_page(p);
3106 p += PAGE_CACHE_SIZE;
3107 }
3108}
3109
e50a1c2e
BF		 3110struct nfs4_cached_acl {
3111 int cached;
3112 size_t len;
3e9d4154 3113 char data[0];
e50a1c2e
BF		 3114};
3115
3116static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3117{
3118 struct nfs_inode *nfsi = NFS_I(inode);
3119
3120 spin_lock(&inode->i_lock);
3121 kfree(nfsi->nfs4_acl);
3122 nfsi->nfs4_acl = acl;
3123 spin_unlock(&inode->i_lock);
3124}
3125
3126static void nfs4_zap_acl_attr(struct inode *inode)
3127{
3128 nfs4_set_cached_acl(inode, NULL);
3129}
3130
3131static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3132{
3133 struct nfs_inode *nfsi = NFS_I(inode);
3134 struct nfs4_cached_acl *acl;
3135 int ret = -ENOENT;
3136
3137 spin_lock(&inode->i_lock);
3138 acl = nfsi->nfs4_acl;
3139 if (acl == NULL)
3140 goto out;
3141 if (buf == NULL) /* user is just asking for length */
3142 goto out_len;
3143 if (acl->cached == 0)
3144 goto out;
3145 ret = -ERANGE; /* see getxattr(2) man page */
3146 if (acl->len > buflen)
3147 goto out;
3148 memcpy(buf, acl->data, acl->len);
3149out_len:
3150 ret = acl->len;
3151out:
3152 spin_unlock(&inode->i_lock);
3153 return ret;
3154}
3155
3156static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3157{
3158 struct nfs4_cached_acl *acl;
3159
3160 if (buf && acl_len <= PAGE_SIZE) {
3161 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3162 if (acl == NULL)
3163 goto out;
3164 acl->cached = 1;
3165 memcpy(acl->data, buf, acl_len);
3166 } else {
3167 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3168 if (acl == NULL)
3169 goto out;
3170 acl->cached = 0;
3171 }
3172 acl->len = acl_len;
3173out:
3174 nfs4_set_cached_acl(inode, acl);
3175}
3176
16b4289c 3177static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3178{
aa1870af
BF		 3179 struct page *pages[NFS4ACL_MAXPAGES];
3180 struct nfs_getaclargs args = {
3181 .fh = NFS_FH(inode),
3182 .acl_pages = pages,
3183 .acl_len = buflen,
3184 };
663c79b3
BH		 3185 struct nfs_getaclres res = {
3186 .acl_len = buflen,
3187 };
e50a1c2e 3188 void *resp_buf;
aa1870af
BF		 3189 struct rpc_message msg = {
3190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3191 .rpc_argp = &args,
663c79b3 3192 .rpc_resp = &res,
aa1870af 3193 };
e50a1c2e 3194 struct page *localpage = NULL;
aa1870af
BF		 3195 int ret;
3196
e50a1c2e
BF		 3197 if (buflen < PAGE_SIZE) {
3198 /* As long as we're doing a round trip to the server anyway,
3199 * let's be prepared for a page of acl data. */
3200 localpage = alloc_page(GFP_KERNEL);
3201 resp_buf = page_address(localpage);
3202 if (localpage == NULL)
3203 return -ENOMEM;
3204 args.acl_pages[0] = localpage;
3205 args.acl_pgbase = 0;
663c79b3 3206 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3207 } else {
3208 resp_buf = buf;
3209 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3210 }
cccef3b9 3211 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3212 if (ret)
3213 goto out_free;
663c79b3
BH		 3214 if (res.acl_len > args.acl_len)
3215 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3216 else
663c79b3 3217 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3218 if (buf) {
3219 ret = -ERANGE;
663c79b3 3220 if (res.acl_len > buflen)
e50a1c2e
BF		 3221 goto out_free;
3222 if (localpage)
663c79b3 3223 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3224 }
663c79b3 3225 ret = res.acl_len;
e50a1c2e
BF		 3226out_free:
3227 if (localpage)
3228 __free_page(localpage);
aa1870af
BF		 3229 return ret;
3230}
3231
16b4289c
TM		 3232static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3233{
3234 struct nfs4_exception exception = { };
3235 ssize_t ret;
3236 do {
3237 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3238 if (ret >= 0)
3239 break;
3240 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3241 } while (exception.retry);
3242 return ret;
3243}
3244
e50a1c2e
BF		 3245static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3246{
3247 struct nfs_server *server = NFS_SERVER(inode);
3248 int ret;
3249
3250 if (!nfs4_server_supports_acls(server))
3251 return -EOPNOTSUPP;
3252 ret = nfs_revalidate_inode(server, inode);
3253 if (ret < 0)
3254 return ret;
3255 ret = nfs4_read_cached_acl(inode, buf, buflen);
3256 if (ret != -ENOENT)
3257 return ret;
3258 return nfs4_get_acl_uncached(inode, buf, buflen);
3259}
3260
16b4289c 3261static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3262{
3263 struct nfs_server *server = NFS_SERVER(inode);
3264 struct page *pages[NFS4ACL_MAXPAGES];
3265 struct nfs_setaclargs arg = {
3266 .fh = NFS_FH(inode),
3267 .acl_pages = pages,
3268 .acl_len = buflen,
3269 };
73c403a9 3270 struct nfs_setaclres res;
4b580ee3
BF		 3271 struct rpc_message msg = {
3272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3273 .rpc_argp = &arg,
73c403a9 3274 .rpc_resp = &res,
4b580ee3
BF		 3275 };
3276 int ret;
3277
3278 if (!nfs4_server_supports_acls(server))
3279 return -EOPNOTSUPP;
642ac549 3280 nfs_inode_return_delegation(inode);
4b580ee3 3281 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3282 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3283 nfs_access_zap_cache(inode);
3284 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3285 return ret;
3286}
3287
16b4289c
TM		 3288static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3289{
3290 struct nfs4_exception exception = { };
3291 int err;
3292 do {
3293 err = nfs4_handle_exception(NFS_SERVER(inode),
3294 __nfs4_proc_set_acl(inode, buf, buflen),
3295 &exception);
3296 } while (exception.retry);
3297 return err;
3298}
3299
1da177e4 3300static int
8328d59f 3301_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3302{
1da177e4
LT		 3303 if (!clp || task->tk_status >= 0)
3304 return 0;
3305 switch(task->tk_status) {
9e33bed5
TM		 3306 case -NFS4ERR_ADMIN_REVOKED:
3307 case -NFS4ERR_BAD_STATEID:
3308 case -NFS4ERR_OPENMODE:
3309 if (state == NULL)
3310 break;
3311 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3312 case -NFS4ERR_STALE_CLIENTID:
3313 case -NFS4ERR_STALE_STATEID:
3314 case -NFS4ERR_EXPIRED:
5d00837b 3315 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3316 nfs4_schedule_state_recovery(clp);
e005e804 3317 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3318 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3319 task->tk_status = 0;
3320 return -EAGAIN;
4745e315
AA		 3321#if defined(CONFIG_NFS_V4_1)
3322 case -NFS4ERR_BADSESSION:
3323 case -NFS4ERR_BADSLOT:
3324 case -NFS4ERR_BAD_HIGH_SLOT:
3325 case -NFS4ERR_DEADSESSION:
3326 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3327 case -NFS4ERR_SEQ_FALSE_RETRY:
3328 case -NFS4ERR_SEQ_MISORDERED:
3329 dprintk("%s ERROR %d, Reset session\n", __func__,
3330 task->tk_status);
3331 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3332 task->tk_status = 0;
3333 return -EAGAIN;
3334#endif /* CONFIG_NFS_V4_1 */
1da177e4 3335 case -NFS4ERR_DELAY:
8328d59f
AA		 3336 if (server)
3337 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3338 case -NFS4ERR_GRACE:
1da177e4
LT		 3339 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3340 task->tk_status = 0;
3341 return -EAGAIN;
3342 case -NFS4ERR_OLD_STATEID:
3343 task->tk_status = 0;
3344 return -EAGAIN;
3345 }
3346 task->tk_status = nfs4_map_errors(task->tk_status);
3347 return 0;
3348}
3349
8328d59f
AA		 3350static int
3351nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3352{
3353 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3354}
3355
adfa6f98 3356int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3357{
3358 nfs4_verifier sc_verifier;
3359 struct nfs4_setclientid setclientid = {
3360 .sc_verifier = &sc_verifier,
3361 .sc_prog = program,
3362 };
3363 struct rpc_message msg = {
3364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3365 .rpc_argp = &setclientid,
3366 .rpc_resp = clp,
286d7d6a 3367 .rpc_cred = cred,
1da177e4 3368 };
bc4785cd 3369 __be32 *p;
1da177e4
LT		 3370 int loop = 0;
3371 int status;
3372
bc4785cd 3373 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3374 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3375 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3376
3377 for(;;) {
3378 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3379 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3380 clp->cl_ipaddr,
3381 rpc_peeraddr2str(clp->cl_rpcclient,
3382 RPC_DISPLAY_ADDR),
69dd716c
TM		 3383 rpc_peeraddr2str(clp->cl_rpcclient,
3384 RPC_DISPLAY_PROTO),
78ea323b 3385 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3386 clp->cl_id_uniquifier);
3387 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3388 sizeof(setclientid.sc_netid),
3389 rpc_peeraddr2str(clp->cl_rpcclient,
3390 RPC_DISPLAY_NETID));
1da177e4 3391 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3392 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3393 clp->cl_ipaddr, port >> 8, port & 255);
3394
3395 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3396 if (status != -NFS4ERR_CLID_INUSE)
3397 break;
3398 if (signalled())
3399 break;
3400 if (loop++ & 1)
3401 ssleep(clp->cl_lease_time + 1);
3402 else
3403 if (++clp->cl_id_uniquifier == 0)
3404 break;
3405 }
3406 return status;
3407}
3408
adfa6f98 3409static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3410{
3411 struct nfs_fsinfo fsinfo;
3412 struct rpc_message msg = {
3413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3414 .rpc_argp = clp,
3415 .rpc_resp = &fsinfo,
286d7d6a 3416 .rpc_cred = cred,
1da177e4
LT		 3417 };
3418 unsigned long now;
3419 int status;
3420
3421 now = jiffies;
3422 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3423 if (status == 0) {
3424 spin_lock(&clp->cl_lock);
3425 clp->cl_lease_time = fsinfo.lease_time * HZ;
3426 clp->cl_last_renewal = now;
3427 spin_unlock(&clp->cl_lock);
3428 }
3429 return status;
3430}
3431
adfa6f98 3432int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3433{
77e03677 3434 long timeout = 0;
51581f3b
TM		 3435 int err;
3436 do {
3437 err = _nfs4_proc_setclientid_confirm(clp, cred);
3438 switch (err) {
3439 case 0:
3440 return err;
3441 case -NFS4ERR_RESOURCE:
3442 /* The IBM lawyers misread another document! */
3443 case -NFS4ERR_DELAY:
3444 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3445 }
3446 } while (err == 0);
3447 return err;
3448}
3449
fe650407
TM		 3450struct nfs4_delegreturndata {
3451 struct nfs4_delegreturnargs args;
fa178f29 3452 struct nfs4_delegreturnres res;
fe650407
TM		 3453 struct nfs_fh fh;
3454 nfs4_stateid stateid;
26e976a8 3455 unsigned long timestamp;
fa178f29 3456 struct nfs_fattr fattr;
fe650407
TM		 3457 int rpc_status;
3458};
3459
fe650407
TM		 3460static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3461{
3462 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3463
3464 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3465 task->tk_status);
3466
fe650407 3467 data->rpc_status = task->tk_status;
26e976a8 3468 if (data->rpc_status == 0)
fa178f29 3469 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3470}
3471
3472static void nfs4_delegreturn_release(void *calldata)
3473{
fe650407
TM		 3474 kfree(calldata);
3475}
3476
938e1010
AA		 3477#if defined(CONFIG_NFS_V4_1)
3478static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3479{
3480 struct nfs4_delegreturndata *d_data;
3481
3482 d_data = (struct nfs4_delegreturndata *)data;
3483
3484 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3485 &d_data->args.seq_args,
3486 &d_data->res.seq_res, 1, task))
3487 return;
3488 rpc_call_start(task);
3489}
3490#endif /* CONFIG_NFS_V4_1 */
3491
c8d149f3 3492static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3493#if defined(CONFIG_NFS_V4_1)
3494 .rpc_call_prepare = nfs4_delegreturn_prepare,
3495#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3496 .rpc_call_done = nfs4_delegreturn_done,
3497 .rpc_release = nfs4_delegreturn_release,
3498};
3499
e6f81075 3500static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3501{
3502 struct nfs4_delegreturndata *data;
fa178f29 3503 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3504 struct rpc_task *task;
5138fde0
TM		 3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3507 .rpc_cred = cred,
3508 };
c970aa85
TM		 3509 struct rpc_task_setup task_setup_data = {
3510 .rpc_client = server->client,
5138fde0 3511 .rpc_message = &msg,
c970aa85
TM		 3512 .callback_ops = &nfs4_delegreturn_ops,
3513 .flags = RPC_TASK_ASYNC,
3514 };
e6f81075 3515 int status = 0;
fe650407 3516
938e1010 3517 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3518 if (data == NULL)
3519 return -ENOMEM;
3520 data->args.fhandle = &data->fh;
3521 data->args.stateid = &data->stateid;
fa178f29 3522 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3523 nfs_copy_fh(&data->fh, NFS_FH(inode));
3524 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3525 data->res.fattr = &data->fattr;
3526 data->res.server = server;
5f7dbd5c 3527 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3528 nfs_fattr_init(data->res.fattr);
26e976a8 3529 data->timestamp = jiffies;
fe650407
TM		 3530 data->rpc_status = 0;
3531
c970aa85 3532 task_setup_data.callback_data = data;
5138fde0
TM		 3533 msg.rpc_argp = &data->args,
3534 msg.rpc_resp = &data->res,
c970aa85 3535 task = rpc_run_task(&task_setup_data);
7a1218a2 3536 if (IS_ERR(task))
fe650407 3537 return PTR_ERR(task);
e6f81075
TM		 3538 if (!issync)
3539 goto out;
fe650407 3540 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3541 if (status != 0)
3542 goto out;
3543 status = data->rpc_status;
3544 if (status != 0)
3545 goto out;
3546 nfs_refresh_inode(inode, &data->fattr);
3547out:
e6b3c4db 3548 rpc_put_task(task);
fe650407 3549 return status;
1da177e4
LT		 3550}
3551
e6f81075 3552int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3553{
3554 struct nfs_server *server = NFS_SERVER(inode);
3555 struct nfs4_exception exception = { };
3556 int err;
3557 do {
e6f81075 3558 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3559 switch (err) {
3560 case -NFS4ERR_STALE_STATEID:
3561 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3562 case 0:
3563 return 0;
3564 }
3565 err = nfs4_handle_exception(server, err, &exception);
3566 } while (exception.retry);
3567 return err;
3568}
3569
3570#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3571#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3572
3573/*
3574 * sleep, with exponential backoff, and retry the LOCK operation.
3575 */
3576static unsigned long
3577nfs4_set_lock_task_retry(unsigned long timeout)
3578{
150030b7 3579 schedule_timeout_killable(timeout);
1da177e4
LT		 3580 timeout <<= 1;
3581 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3582 return NFS4_LOCK_MAXTIMEOUT;
3583 return timeout;
3584}
3585
1da177e4
LT		 3586static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3587{
3588 struct inode *inode = state->inode;
3589 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3590 struct nfs_client *clp = server->nfs_client;
911d1aaf 3591 struct nfs_lockt_args arg = {
1da177e4 3592 .fh = NFS_FH(inode),
911d1aaf 3593 .fl = request,
1da177e4 3594 };
911d1aaf
TM		 3595 struct nfs_lockt_res res = {
3596 .denied = request,
1da177e4
LT		 3597 };
3598 struct rpc_message msg = {
3599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3600 .rpc_argp = &arg,
3601 .rpc_resp = &res,
3602 .rpc_cred = state->owner->so_cred,
3603 };
1da177e4
LT		 3604 struct nfs4_lock_state *lsp;
3605 int status;
3606
911d1aaf 3607 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3608 status = nfs4_set_lock_state(state, request);
3609 if (status != 0)
3610 goto out;
3611 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3612 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3613 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3614 switch (status) {
3615 case 0:
3616 request->fl_type = F_UNLCK;
3617 break;
3618 case -NFS4ERR_DENIED:
3619 status = 0;
1da177e4 3620 }
70cc6487 3621 request->fl_ops->fl_release_private(request);
8d0a8a9d 3622out:
1da177e4
LT		 3623 return status;
3624}
3625
3626static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3627{
3628 struct nfs4_exception exception = { };
3629 int err;
3630
3631 do {
3632 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3633 _nfs4_proc_getlk(state, cmd, request),
3634 &exception);
3635 } while (exception.retry);
3636 return err;
3637}
3638
3639static int do_vfs_lock(struct file *file, struct file_lock *fl)
3640{
3641 int res = 0;
3642 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3643 case FL_POSIX:
3644 res = posix_lock_file_wait(file, fl);
3645 break;
3646 case FL_FLOCK:
3647 res = flock_lock_file_wait(file, fl);
3648 break;
3649 default:
3650 BUG();
3651 }
1da177e4
LT		 3652 return res;
3653}
3654
faf5f49c 3655struct nfs4_unlockdata {
911d1aaf
TM		 3656 struct nfs_locku_args arg;
3657 struct nfs_locku_res res;
faf5f49c
TM		 3658 struct nfs4_lock_state *lsp;
3659 struct nfs_open_context *ctx;
911d1aaf
TM		 3660 struct file_lock fl;
3661 const struct nfs_server *server;
26e976a8 3662 unsigned long timestamp;
faf5f49c
TM		 3663};
3664
911d1aaf
TM		 3665static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3666 struct nfs_open_context *ctx,
3667 struct nfs4_lock_state *lsp,
3668 struct nfs_seqid *seqid)
3669{
3670 struct nfs4_unlockdata *p;
3671 struct inode *inode = lsp->ls_state->inode;
3672
a893693c 3673 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3674 if (p == NULL)
3675 return NULL;
3676 p->arg.fh = NFS_FH(inode);
3677 p->arg.fl = &p->fl;
3678 p->arg.seqid = seqid;
c1d51931 3679 p->res.seqid = seqid;
5f7dbd5c 3680 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3681 p->arg.stateid = &lsp->ls_stateid;
3682 p->lsp = lsp;
3683 atomic_inc(&lsp->ls_count);
3684 /* Ensure we don't close file until we're done freeing locks! */
3685 p->ctx = get_nfs_open_context(ctx);
3686 memcpy(&p->fl, fl, sizeof(p->fl));
3687 p->server = NFS_SERVER(inode);
3688 return p;
3689}
3690
06f814a3 3691static void nfs4_locku_release_calldata(void *data)
faf5f49c 3692{
963d8fe5 3693 struct nfs4_unlockdata *calldata = data;
911d1aaf 3694 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3695 nfs4_put_lock_state(calldata->lsp);
3696 put_nfs_open_context(calldata->ctx);
3697 kfree(calldata);
faf5f49c
TM		 3698}
3699
963d8fe5 3700static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3701{
963d8fe5 3702 struct nfs4_unlockdata *calldata = data;
faf5f49c 3703
a893693c
AA		 3704 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3705 task->tk_status);
06f814a3
TM		 3706 if (RPC_ASSASSINATED(task))
3707 return;
faf5f49c
TM		 3708 switch (task->tk_status) {
3709 case 0:
3710 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3711 calldata->res.stateid.data,
faf5f49c 3712 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3713 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3714 break;
9e33bed5
TM		 3715 case -NFS4ERR_BAD_STATEID:
3716 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3717 case -NFS4ERR_STALE_STATEID:
3718 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3719 break;
3720 default:
9e33bed5 3721 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3722 nfs4_restart_rpc(task,
3723 calldata->server->nfs_client);
faf5f49c 3724 }
a893693c
AA		 3725 nfs4_sequence_free_slot(calldata->server->nfs_client,
3726 &calldata->res.seq_res);
faf5f49c
TM		 3727}
3728
4ce70ada 3729static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3730{
4ce70ada 3731 struct nfs4_unlockdata *calldata = data;
faf5f49c 3732
911d1aaf 3733 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3734 return;
3735 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3736 /* Note: exit _without_ running nfs4_locku_done */
3737 task->tk_action = NULL;
faf5f49c
TM		 3738 return;
3739 }
26e976a8 3740 calldata->timestamp = jiffies;
a893693c
AA		 3741 if (nfs4_setup_sequence(calldata->server->nfs_client,
3742 &calldata->arg.seq_args,
3743 &calldata->res.seq_res, 1, task))
3744 return;
5138fde0 3745 rpc_call_start(task);
faf5f49c
TM		 3746}
3747
963d8fe5 3748static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3749 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3750 .rpc_call_done = nfs4_locku_done,
06f814a3 3751 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3752};
3753
a5d16a4d
TM		 3754static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3755 struct nfs_open_context *ctx,
3756 struct nfs4_lock_state *lsp,
3757 struct nfs_seqid *seqid)
3758{
3759 struct nfs4_unlockdata *data;
5138fde0
TM		 3760 struct rpc_message msg = {
3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3762 .rpc_cred = ctx->cred,
3763 };
c970aa85
TM		 3764 struct rpc_task_setup task_setup_data = {
3765 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3766 .rpc_message = &msg,
c970aa85 3767 .callback_ops = &nfs4_locku_ops,
101070ca 3768 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3769 .flags = RPC_TASK_ASYNC,
3770 };
a5d16a4d 3771
137d6aca
FF		 3772 /* Ensure this is an unlock - when canceling a lock, the
3773 * canceled lock is passed in, and it won't be an unlock.
3774 */
3775 fl->fl_type = F_UNLCK;
3776
a5d16a4d
TM		 3777 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3778 if (data == NULL) {
3779 nfs_free_seqid(seqid);
3780 return ERR_PTR(-ENOMEM);
3781 }
3782
5138fde0
TM		 3783 msg.rpc_argp = &data->arg,
3784 msg.rpc_resp = &data->res,
c970aa85
TM		 3785 task_setup_data.callback_data = data;
3786 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3787}
3788
faf5f49c
TM		 3789static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3790{
19e03c57 3791 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3792 struct nfs_seqid *seqid;
1da177e4 3793 struct nfs4_lock_state *lsp;
06f814a3
TM		 3794 struct rpc_task *task;
3795 int status = 0;
536ff0f8 3796 unsigned char fl_flags = request->fl_flags;
faf5f49c 3797
8d0a8a9d 3798 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3799 /* Unlock _before_ we do the RPC call */
3800 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3801 down_read(&nfsi->rwsem);
3802 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3803 up_read(&nfsi->rwsem);
9b073574 3804 goto out;
19e03c57
TM		 3805 }
3806 up_read(&nfsi->rwsem);
8d0a8a9d 3807 if (status != 0)
9b073574
TM		 3808 goto out;
3809 /* Is this a delegated lock? */
3810 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3811 goto out;
8d0a8a9d 3812 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3813 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3814 status = -ENOMEM;
911d1aaf 3815 if (seqid == NULL)
9b073574 3816 goto out;
cd3758e3 3817 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3818 status = PTR_ERR(task);
3819 if (IS_ERR(task))
9b073574 3820 goto out;
a5d16a4d 3821 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3822 rpc_put_task(task);
9b073574 3823out:
536ff0f8 3824 request->fl_flags = fl_flags;
1da177e4
LT		 3825 return status;
3826}
3827
a5d16a4d
TM		 3828struct nfs4_lockdata {
3829 struct nfs_lock_args arg;
3830 struct nfs_lock_res res;
3831 struct nfs4_lock_state *lsp;
3832 struct nfs_open_context *ctx;
3833 struct file_lock fl;
26e976a8 3834 unsigned long timestamp;
a5d16a4d
TM		 3835 int rpc_status;
3836 int cancelled;
66179efe 3837 struct nfs_server *server;
a5d16a4d
TM		 3838};
3839
3840static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3841 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3842{
a5d16a4d
TM		 3843 struct nfs4_lockdata *p;
3844 struct inode *inode = lsp->ls_state->inode;
1da177e4 3845 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3846
3847 p = kzalloc(sizeof(*p), GFP_KERNEL);
3848 if (p == NULL)
3849 return NULL;
3850
3851 p->arg.fh = NFS_FH(inode);
3852 p->arg.fl = &p->fl;
2f74c0a0
TM		 3853 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3854 if (p->arg.open_seqid == NULL)
3855 goto out_free;
a5d16a4d
TM		 3856 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3857 if (p->arg.lock_seqid == NULL)
2f74c0a0 3858 goto out_free_seqid;
a5d16a4d 3859 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3860 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3861 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3862 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3863 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3864 p->lsp = lsp;
66179efe 3865 p->server = server;
a5d16a4d
TM		 3866 atomic_inc(&lsp->ls_count);
3867 p->ctx = get_nfs_open_context(ctx);
3868 memcpy(&p->fl, fl, sizeof(p->fl));
3869 return p;
2f74c0a0
TM		 3870out_free_seqid:
3871 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3872out_free:
3873 kfree(p);
3874 return NULL;
3875}
3876
3877static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3878{
3879 struct nfs4_lockdata *data = calldata;
3880 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3881
3110ff80 3882 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3883 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3884 return;
a5d16a4d
TM		 3885 /* Do we need to do an open_to_lock_owner? */
3886 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3887 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3888 return;
a5d16a4d
TM		 3889 data->arg.open_stateid = &state->stateid;
3890 data->arg.new_lock_owner = 1;
c1d51931 3891 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3892 } else
3893 data->arg.new_lock_owner = 0;
26e976a8 3894 data->timestamp = jiffies;
66179efe
AA		 3895 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3896 &data->res.seq_res, 1, task))
3897 return;
5138fde0 3898 rpc_call_start(task);
3110ff80 3899 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3900}
3901
3902static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3903{
3904 struct nfs4_lockdata *data = calldata;
3905
3110ff80 3906 dprintk("%s: begin!\n", __func__);
a5d16a4d 3907
66179efe
AA		 3908 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3909 task->tk_status);
3910
a5d16a4d
TM		 3911 data->rpc_status = task->tk_status;
3912 if (RPC_ASSASSINATED(task))
3913 goto out;
3914 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3915 if (data->rpc_status == 0)
3916 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3917 else
3918 goto out;
3919 }
3920 if (data->rpc_status == 0) {
3921 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3922 sizeof(data->lsp->ls_stateid.data));
3923 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3924 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3925 }
a5d16a4d 3926out:
3110ff80 3927 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3928}
3929
3930static void nfs4_lock_release(void *calldata)
3931{
3932 struct nfs4_lockdata *data = calldata;
3933
3110ff80 3934 dprintk("%s: begin!\n", __func__);
2f74c0a0 3935 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3936 if (data->cancelled != 0) {
3937 struct rpc_task *task;
3938 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3939 data->arg.lock_seqid);
3940 if (!IS_ERR(task))
e6b3c4db 3941 rpc_put_task(task);
3110ff80 3942 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3943 } else
3944 nfs_free_seqid(data->arg.lock_seqid);
3945 nfs4_put_lock_state(data->lsp);
3946 put_nfs_open_context(data->ctx);
3947 kfree(data);
3110ff80 3948 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3949}
3950
3951static const struct rpc_call_ops nfs4_lock_ops = {
3952 .rpc_call_prepare = nfs4_lock_prepare,
3953 .rpc_call_done = nfs4_lock_done,
3954 .rpc_release = nfs4_lock_release,
3955};
3956
3957static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3958{
3959 struct nfs4_lockdata *data;
3960 struct rpc_task *task;
5138fde0
TM		 3961 struct rpc_message msg = {
3962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3963 .rpc_cred = state->owner->so_cred,
3964 };
c970aa85
TM		 3965 struct rpc_task_setup task_setup_data = {
3966 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3967 .rpc_message = &msg,
c970aa85 3968 .callback_ops = &nfs4_lock_ops,
101070ca 3969 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3970 .flags = RPC_TASK_ASYNC,
3971 };
a5d16a4d
TM		 3972 int ret;
3973
3110ff80 3974 dprintk("%s: begin!\n", __func__);
cd3758e3 3975 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3976 fl->fl_u.nfs4_fl.owner);
3977 if (data == NULL)
3978 return -ENOMEM;
3979 if (IS_SETLKW(cmd))
3980 data->arg.block = 1;
3981 if (reclaim != 0)
3982 data->arg.reclaim = 1;
5138fde0
TM		 3983 msg.rpc_argp = &data->arg,
3984 msg.rpc_resp = &data->res,
c970aa85
TM		 3985 task_setup_data.callback_data = data;
3986 task = rpc_run_task(&task_setup_data);
7a1218a2 3987 if (IS_ERR(task))
a5d16a4d 3988 return PTR_ERR(task);
a5d16a4d
TM		 3989 ret = nfs4_wait_for_completion_rpc_task(task);
3990 if (ret == 0) {
3991 ret = data->rpc_status;
a5d16a4d
TM		 3992 } else
3993 data->cancelled = 1;
e6b3c4db 3994 rpc_put_task(task);
3110ff80 3995 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3996 return ret;
1da177e4
LT		 3997}
3998
3999static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4000{
202b50dc
TM		 4001 struct nfs_server *server = NFS_SERVER(state->inode);
4002 struct nfs4_exception exception = { };
4003 int err;
4004
4005 do {
42a2d13e
TM		 4006 /* Cache the lock if possible... */
4007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4008 return 0;
202b50dc
TM		 4009 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4010 if (err != -NFS4ERR_DELAY)
4011 break;
4012 nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4014 return err;
1da177e4
LT		 4015}
4016
4017static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4018{
202b50dc
TM		 4019 struct nfs_server *server = NFS_SERVER(state->inode);
4020 struct nfs4_exception exception = { };
4021 int err;
4022
6bfc93ef
TM		 4023 err = nfs4_set_lock_state(state, request);
4024 if (err != 0)
4025 return err;
202b50dc 4026 do {
42a2d13e
TM		 4027 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4028 return 0;
202b50dc
TM		 4029 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4030 if (err != -NFS4ERR_DELAY)
4031 break;
4032 nfs4_handle_exception(server, err, &exception);
4033 } while (exception.retry);
4034 return err;
1da177e4
LT		 4035}
4036
4037static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4038{
19e03c57 4039 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4040 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4041 int status;
4042
6bfc93ef 4043 /* Is this a delegated open? */
6bfc93ef
TM		 4044 status = nfs4_set_lock_state(state, request);
4045 if (status != 0)
4046 goto out;
01c3b861
TM		 4047 request->fl_flags |= FL_ACCESS;
4048 status = do_vfs_lock(request->fl_file, request);
4049 if (status < 0)
4050 goto out;
19e03c57 4051 down_read(&nfsi->rwsem);
01c3b861 4052 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4053 /* Yes: cache locks! */
01c3b861 4054 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4055 request->fl_flags = fl_flags & ~FL_SLEEP;
4056 status = do_vfs_lock(request->fl_file, request);
4057 goto out_unlock;
01c3b861 4058 }
6bfc93ef
TM		 4059 status = _nfs4_do_setlk(state, cmd, request, 0);
4060 if (status != 0)
01c3b861 4061 goto out_unlock;
6bfc93ef 4062 /* Note: we always want to sleep here! */
01c3b861 4063 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4064 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4065 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4066out_unlock:
19e03c57 4067 up_read(&nfsi->rwsem);
01c3b861
TM		 4068out:
4069 request->fl_flags = fl_flags;
1da177e4
LT		 4070 return status;
4071}
4072
4073static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4074{
4075 struct nfs4_exception exception = { };
4076 int err;
4077
4078 do {
965b5d67
TM		 4079 err = _nfs4_proc_setlk(state, cmd, request);
4080 if (err == -NFS4ERR_DENIED)
4081 err = -EAGAIN;
1da177e4 4082 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4083 err, &exception);
1da177e4
LT		 4084 } while (exception.retry);
4085 return err;
4086}
4087
4088static int
4089nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4090{
4091 struct nfs_open_context *ctx;
4092 struct nfs4_state *state;
4093 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4094 int status;
4095
4096 /* verify open state */
cd3758e3 4097 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4098 state = ctx->state;
4099
4100 if (request->fl_start < 0 || request->fl_end < 0)
4101 return -EINVAL;
4102
4103 if (IS_GETLK(cmd))
4104 return nfs4_proc_getlk(state, F_GETLK, request);
4105
4106 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4107 return -EINVAL;
4108
4109 if (request->fl_type == F_UNLCK)
4110 return nfs4_proc_unlck(state, cmd, request);
4111
4112 do {
4113 status = nfs4_proc_setlk(state, cmd, request);
4114 if ((status != -EAGAIN) || IS_SETLK(cmd))
4115 break;
4116 timeout = nfs4_set_lock_task_retry(timeout);
4117 status = -ERESTARTSYS;
4118 if (signalled())
4119 break;
4120 } while(status < 0);
1da177e4
LT		 4121 return status;
4122}
4123
888e694c
TM		 4124int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4125{
4126 struct nfs_server *server = NFS_SERVER(state->inode);
4127 struct nfs4_exception exception = { };
4128 int err;
4129
4130 err = nfs4_set_lock_state(state, fl);
4131 if (err != 0)
4132 goto out;
4133 do {
4134 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4135 switch (err) {
4136 default:
4137 printk(KERN_ERR "%s: unhandled error %d.\n",
4138 __func__, err);
4139 case 0:
965b5d67 4140 case -ESTALE:
d5122201
TM		 4141 goto out;
4142 case -NFS4ERR_EXPIRED:
4143 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4144 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4145 nfs4_schedule_state_recovery(server->nfs_client);
4146 goto out;
965b5d67
TM		 4147 case -ERESTARTSYS:
4148 /*
4149 * The show must go on: exit, but mark the
4150 * stateid as needing recovery.
4151 */
4152 case -NFS4ERR_ADMIN_REVOKED:
4153 case -NFS4ERR_BAD_STATEID:
4154 case -NFS4ERR_OPENMODE:
4155 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4156 err = 0;
4157 goto out;
4158 case -ENOMEM:
4159 case -NFS4ERR_DENIED:
4160 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4161 err = 0;
4162 goto out;
d5122201
TM		 4163 case -NFS4ERR_DELAY:
4164 break;
4165 }
888e694c
TM		 4166 err = nfs4_handle_exception(server, err, &exception);
4167 } while (exception.retry);
4168out:
4169 return err;
4170}
6b3b5496 4171
aa1870af
BF		 4172#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4173
6b3b5496
BF		 4174int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4175 size_t buflen, int flags)
4176{
4b580ee3
BF		 4177 struct inode *inode = dentry->d_inode;
4178
4179 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4180 return -EOPNOTSUPP;
4181
4b580ee3 4182 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4183}
4184
4185/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4186 * and that's what we'll do for e.g. user attributes that haven't been set.
4187 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4188 * attributes in kernel-managed attribute namespaces. */
4189ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4190 size_t buflen)
4191{
aa1870af
BF		 4192 struct inode *inode = dentry->d_inode;
4193
4194 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4195 return -EOPNOTSUPP;
4196
4197 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4198}
4199
4200ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4201{
aa1870af 4202 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4203
096455a2
BF		 4204 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4205 return 0;
6b3b5496
BF		 4206 if (buf && buflen < len)
4207 return -ERANGE;
4208 if (buf)
aa1870af
BF		 4209 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4210 return len;
6b3b5496
BF		 4211}
4212
69aaaae1
TM		 4213static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4214{
4215 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4216 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4217 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4218 return;
4219
4220 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4221 NFS_ATTR_FATTR_NLINK;
4222 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4223 fattr->nlink = 2;
4224}
4225
56659e99 4226int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4227 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4228{
4229 struct nfs_server *server = NFS_SERVER(dir);
4230 u32 bitmask[2] = {
361e624f
MN		 4231 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4232 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4233 };
4234 struct nfs4_fs_locations_arg args = {
4235 .dir_fh = NFS_FH(dir),
c228fd3a 4236 .name = name,
683b57b4
TM		 4237 .page = page,
4238 .bitmask = bitmask,
4239 };
22958463
BH		 4240 struct nfs4_fs_locations_res res = {
4241 .fs_locations = fs_locations,
4242 };
683b57b4
TM		 4243 struct rpc_message msg = {
4244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4245 .rpc_argp = &args,
22958463 4246 .rpc_resp = &res,
683b57b4
TM		 4247 };
4248 int status;
4249
3110ff80 4250 dprintk("%s: start\n", __func__);
c228fd3a 4251 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4252 fs_locations->server = server;
830b8e33 4253 fs_locations->nlocations = 0;
cccef3b9 4254 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4255 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4256 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4257 return status;
4258}
4259
557134a3 4260#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4261/*
4262 * nfs4_proc_exchange_id()
4263 *
4264 * Since the clientid has expired, all compounds using sessions
4265 * associated with the stale clientid will be returning
4266 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4267 * be in some phase of session reset.
4268 */
4269static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4270{
4271 nfs4_verifier verifier;
4272 struct nfs41_exchange_id_args args = {
4273 .client = clp,
4274 .flags = clp->cl_exchange_flags,
4275 };
4276 struct nfs41_exchange_id_res res = {
4277 .client = clp,
4278 };
4279 int status;
4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4282 .rpc_argp = &args,
4283 .rpc_resp = &res,
4284 .rpc_cred = cred,
4285 };
4286 __be32 *p;
4287
4288 dprintk("--> %s\n", __func__);
4289 BUG_ON(clp == NULL);
a7b72103 4290
99fe60d0
BH		 4291 p = (u32 *)verifier.data;
4292 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4293 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4294 args.verifier = &verifier;
4295
4296 while (1) {
4297 args.id_len = scnprintf(args.id, sizeof(args.id),
4298 "%s/%s %u",
4299 clp->cl_ipaddr,
4300 rpc_peeraddr2str(clp->cl_rpcclient,
4301 RPC_DISPLAY_ADDR),
4302 clp->cl_id_uniquifier);
4303
4304 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4305
4306 if (status != NFS4ERR_CLID_INUSE)
4307 break;
4308
4309 if (signalled())
4310 break;
4311
4312 if (++clp->cl_id_uniquifier == 0)
4313 break;
4314 }
4315
4316 dprintk("<-- %s status= %d\n", __func__, status);
4317 return status;
4318}
4319
2050f0cc
AA		 4320struct nfs4_get_lease_time_data {
4321 struct nfs4_get_lease_time_args *args;
4322 struct nfs4_get_lease_time_res *res;
4323 struct nfs_client *clp;
4324};
4325
4326static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4327 void *calldata)
4328{
4329 int ret;
4330 struct nfs4_get_lease_time_data *data =
4331 (struct nfs4_get_lease_time_data *)calldata;
4332
4333 dprintk("--> %s\n", __func__);
4334 /* just setup sequence, do not trigger session recovery
4335 since we're invoked within one */
4336 ret = nfs41_setup_sequence(data->clp->cl_session,
4337 &data->args->la_seq_args,
4338 &data->res->lr_seq_res, 0, task);
4339
4340 BUG_ON(ret == -EAGAIN);
4341 rpc_call_start(task);
4342 dprintk("<-- %s\n", __func__);
4343}
4344
4345/*
4346 * Called from nfs4_state_manager thread for session setup, so don't recover
4347 * from sequence operation or clientid errors.
4348 */
4349static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4350{
4351 struct nfs4_get_lease_time_data *data =
4352 (struct nfs4_get_lease_time_data *)calldata;
4353
4354 dprintk("--> %s\n", __func__);
4355 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4356 switch (task->tk_status) {
4357 case -NFS4ERR_DELAY:
4358 case -NFS4ERR_GRACE:
4359 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4360 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4361 task->tk_status = 0;
eedc020e 4362 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4363 return;
4364 }
4365 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4366 dprintk("<-- %s\n", __func__);
4367}
4368
4369struct rpc_call_ops nfs4_get_lease_time_ops = {
4370 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4371 .rpc_call_done = nfs4_get_lease_time_done,
4372};
4373
4374int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4375{
4376 struct rpc_task *task;
4377 struct nfs4_get_lease_time_args args;
4378 struct nfs4_get_lease_time_res res = {
4379 .lr_fsinfo = fsinfo,
4380 };
4381 struct nfs4_get_lease_time_data data = {
4382 .args = &args,
4383 .res = &res,
4384 .clp = clp,
4385 };
4386 struct rpc_message msg = {
4387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4388 .rpc_argp = &args,
4389 .rpc_resp = &res,
4390 };
4391 struct rpc_task_setup task_setup = {
4392 .rpc_client = clp->cl_rpcclient,
4393 .rpc_message = &msg,
4394 .callback_ops = &nfs4_get_lease_time_ops,
4395 .callback_data = &data
4396 };
4397 int status;
4398
4399 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4400 dprintk("--> %s\n", __func__);
4401 task = rpc_run_task(&task_setup);
4402
4403 if (IS_ERR(task))
4404 status = PTR_ERR(task);
4405 else {
4406 status = task->tk_status;
4407 rpc_put_task(task);
4408 }
4409 dprintk("<-- %s return %d\n", __func__, status);
4410
4411 return status;
4412}
4413
b73dafa7
RL		 4414/*
4415 * Reset a slot table
4416 */
4417static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4418 int old_max_slots, int ivalue)
ac72b7b3 4419{
b73dafa7 4420 int i;
ac72b7b3
AA		 4421 int ret = 0;
4422
b73dafa7 4423 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4424
b73dafa7
RL		 4425 /*
4426 * Until we have dynamic slot table adjustment, insist
4427 * upon the same slot table size
4428 */
ac72b7b3
AA		 4429 if (max_slots != old_max_slots) {
4430 dprintk("%s reset slot table does't match old\n",
4431 __func__);
4432 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4433 goto out;
4434 }
4435 spin_lock(&tbl->slot_tbl_lock);
4436 for (i = 0; i < max_slots; ++i)
b73dafa7 4437 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4438 tbl->highest_used_slotid = -1;
4439 spin_unlock(&tbl->slot_tbl_lock);
4440 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4441 tbl, tbl->slots, tbl->max_slots);
4442out:
4443 dprintk("<-- %s: return %d\n", __func__, ret);
4444 return ret;
4445}
4446
b73dafa7
RL		 4447/*
4448 * Reset the forechannel and backchannel slot tables
4449 */
4450static int nfs4_reset_slot_tables(struct nfs4_session *session)
4451{
4452 int status;
4453
4454 status = nfs4_reset_slot_table(&session->fc_slot_table,
4455 session->fc_attrs.max_reqs,
4456 session->fc_slot_table.max_slots,
4457 1);
f8625a6a
RL		 4458 if (status)
4459 return status;
4460
4461 status = nfs4_reset_slot_table(&session->bc_slot_table,
4462 session->bc_attrs.max_reqs,
4463 session->bc_slot_table.max_slots,
4464 0);
b73dafa7
RL		 4465 return status;
4466}
4467
f8625a6a
RL		 4468/* Destroy the slot table */
4469static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4470{
4471 if (session->fc_slot_table.slots != NULL) {
4472 kfree(session->fc_slot_table.slots);
4473 session->fc_slot_table.slots = NULL;
4474 }
4475 if (session->bc_slot_table.slots != NULL) {
4476 kfree(session->bc_slot_table.slots);
4477 session->bc_slot_table.slots = NULL;
4478 }
4479 return;
4480}
4481
fc931582
AA		 4482/*
4483 * Initialize slot table
4484 */
050047ce
RL		 4485static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4486 int max_slots, int ivalue)
fc931582 4487{
050047ce 4488 int i;
fc931582
AA		 4489 struct nfs4_slot *slot;
4490 int ret = -ENOMEM;
4491
4492 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4493
050047ce 4494 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4495
4496 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4497 if (!slot)
4498 goto out;
4499 for (i = 0; i < max_slots; ++i)
050047ce 4500 slot[i].seq_nr = ivalue;
fc931582
AA		 4501 ret = 0;
4502
4503 spin_lock(&tbl->slot_tbl_lock);
4504 if (tbl->slots != NULL) {
4505 spin_unlock(&tbl->slot_tbl_lock);
4506 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4507 __func__, tbl, tbl->slots);
4508 WARN_ON(1);
4509 goto out_free;
4510 }
4511 tbl->max_slots = max_slots;
4512 tbl->slots = slot;
4513 tbl->highest_used_slotid = -1; /* no slot is currently used */
4514 spin_unlock(&tbl->slot_tbl_lock);
4515 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4516 tbl, tbl->slots, tbl->max_slots);
4517out:
4518 dprintk("<-- %s: return %d\n", __func__, ret);
4519 return ret;
050047ce 4520
fc931582
AA		 4521out_free:
4522 kfree(slot);
4523 goto out;
4524}
4525
050047ce
RL		 4526/*
4527 * Initialize the forechannel and backchannel tables
4528 */
4529static int nfs4_init_slot_tables(struct nfs4_session *session)
4530{
4531 int status;
4532
4533 status = nfs4_init_slot_table(&session->fc_slot_table,
4534 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4535 if (status)
4536 return status;
050047ce 4537
f8625a6a
RL		 4538 status = nfs4_init_slot_table(&session->bc_slot_table,
4539 session->bc_attrs.max_reqs, 0);
4540 if (status)
4541 nfs4_destroy_slot_tables(session);
4542
4543 return status;
557134a3
AA		 4544}
4545
4546struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4547{
4548 struct nfs4_session *session;
4549 struct nfs4_slot_table *tbl;
4550
4551 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4552 if (!session)
4553 return NULL;
76db6d95
AA		 4554
4555 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4556 /*
4557 * The create session reply races with the server back
4558 * channel probe. Mark the client NFS_CS_SESSION_INITING
4559 * so that the client back channel can find the
4560 * nfs_client struct
4561 */
4562 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4563
557134a3
AA		 4564 tbl = &session->fc_slot_table;
4565 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4566 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4567
4568 tbl = &session->bc_slot_table;
4569 spin_lock_init(&tbl->slot_tbl_lock);
4570 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4571
557134a3
AA		 4572 session->clp = clp;
4573 return session;
4574}
4575
4576void nfs4_destroy_session(struct nfs4_session *session)
4577{
5a0ffe54
AA		 4578 nfs4_proc_destroy_session(session);
4579 dprintk("%s Destroy backchannel for xprt %p\n",
4580 __func__, session->clp->cl_rpcclient->cl_xprt);
4581 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4582 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4583 nfs4_destroy_slot_tables(session);
557134a3
AA		 4584 kfree(session);
4585}
4586
fc931582
AA		 4587/*
4588 * Initialize the values to be used by the client in CREATE_SESSION
4589 * If nfs4_init_session set the fore channel request and response sizes,
4590 * use them.
4591 *
4592 * Set the back channel max_resp_sz_cached to zero to force the client to
4593 * always set csa_cachethis to FALSE because the current implementation
4594 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4595 */
4596static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4597{
4598 struct nfs4_session *session = args->client->cl_session;
4599 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4600 mxresp_sz = session->fc_attrs.max_resp_sz;
4601
4602 if (mxrqst_sz == 0)
4603 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4604 if (mxresp_sz == 0)
4605 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4606 /* Fore channel attributes */
4607 args->fc_attrs.headerpadsz = 0;
4608 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4609 args->fc_attrs.max_resp_sz = mxresp_sz;
4610 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4611 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4612 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4613
4614 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4615 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4616 __func__,
4617 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4618 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4619 args->fc_attrs.max_reqs);
4620
4621 /* Back channel attributes */
4622 args->bc_attrs.headerpadsz = 0;
4623 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4624 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4625 args->bc_attrs.max_resp_sz_cached = 0;
4626 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4627 args->bc_attrs.max_reqs = 1;
4628
4629 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4630 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4631 __func__,
4632 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4633 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4634 args->bc_attrs.max_reqs);
4635}
4636
8d35301d
AA		 4637static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4638{
4639 if (rcvd <= sent)
4640 return 0;
4641 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4642 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4643 return -EINVAL;
4644}
4645
4646#define _verify_fore_channel_attr(_name_) \
4647 _verify_channel_attr("fore", #_name_, \
4648 args->fc_attrs._name_, \
4649 session->fc_attrs._name_)
4650
4651#define _verify_back_channel_attr(_name_) \
4652 _verify_channel_attr("back", #_name_, \
4653 args->bc_attrs._name_, \
4654 session->bc_attrs._name_)
4655
4656/*
4657 * The server is not allowed to increase the fore channel header pad size,
4658 * maximum response size, or maximum number of operations.
4659 *
4660 * The back channel attributes are only negotiatied down: We send what the
4661 * (back channel) server insists upon.
4662 */
4663static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4664 struct nfs4_session *session)
4665{
4666 int ret = 0;
4667
4668 ret |= _verify_fore_channel_attr(headerpadsz);
4669 ret |= _verify_fore_channel_attr(max_resp_sz);
4670 ret |= _verify_fore_channel_attr(max_ops);
4671
4672 ret |= _verify_back_channel_attr(headerpadsz);
4673 ret |= _verify_back_channel_attr(max_rqst_sz);
4674 ret |= _verify_back_channel_attr(max_resp_sz);
4675 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4676 ret |= _verify_back_channel_attr(max_ops);
4677 ret |= _verify_back_channel_attr(max_reqs);
4678
4679 return ret;
4680}
4681
fc931582
AA		 4682static int _nfs4_proc_create_session(struct nfs_client *clp)
4683{
4684 struct nfs4_session *session = clp->cl_session;
4685 struct nfs41_create_session_args args = {
4686 .client = clp,
4687 .cb_program = NFS4_CALLBACK,
4688 };
4689 struct nfs41_create_session_res res = {
4690 .client = clp,
4691 };
4692 struct rpc_message msg = {
4693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4694 .rpc_argp = &args,
4695 .rpc_resp = &res,
4696 };
4697 int status;
4698
4699 nfs4_init_channel_attrs(&args);
0f91421e 4700 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4701
4702 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4703
8d35301d
AA		 4704 if (!status)
4705 /* Verify the session's negotiated channel_attrs values */
4706 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4707 if (!status) {
4708 /* Increment the clientid slot sequence id */
4709 clp->cl_seqid++;
4710 }
4711
4712 return status;
4713}
4714
4715/*
4716 * Issues a CREATE_SESSION operation to the server.
4717 * It is the responsibility of the caller to verify the session is
4718 * expired before calling this routine.
4719 */
ac72b7b3 4720int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4721{
4722 int status;
4723 unsigned *ptr;
4724 struct nfs_fsinfo fsinfo;
4725 struct nfs4_session *session = clp->cl_session;
4726
4727 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4728
4729 status = _nfs4_proc_create_session(clp);
4730 if (status)
4731 goto out;
4732
ac72b7b3
AA		 4733 /* Init or reset the fore channel */
4734 if (reset)
b73dafa7 4735 status = nfs4_reset_slot_tables(session);
ac72b7b3 4736 else
050047ce 4737 status = nfs4_init_slot_tables(session);
fc931582
AA		 4738 dprintk("fore channel slot table initialization returned %d\n", status);
4739 if (status)
4740 goto out;
4741
4742 ptr = (unsigned *)&session->sess_id.data[0];
4743 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4744 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4745
ac72b7b3
AA		 4746 if (reset)
4747 /* Lease time is aleady set */
4748 goto out;
4749
fc931582
AA		 4750 /* Get the lease time */
4751 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4752 if (status == 0) {
4753 /* Update lease time and schedule renewal */
4754 spin_lock(&clp->cl_lock);
4755 clp->cl_lease_time = fsinfo.lease_time * HZ;
4756 clp->cl_last_renewal = jiffies;
4757 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4758 spin_unlock(&clp->cl_lock);
4759
4760 nfs4_schedule_state_renewal(clp);
4761 }
4762out:
4763 dprintk("<-- %s\n", __func__);
4764 return status;
4765}
4766
0f3e66c6
AA		 4767/*
4768 * Issue the over-the-wire RPC DESTROY_SESSION.
4769 * The caller must serialize access to this routine.
4770 */
4771int nfs4_proc_destroy_session(struct nfs4_session *session)
4772{
4773 int status = 0;
4774 struct rpc_message msg;
4775
4776 dprintk("--> nfs4_proc_destroy_session\n");
4777
4778 /* session is still being setup */
4779 if (session->clp->cl_cons_state != NFS_CS_READY)
4780 return status;
4781
4782 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4783 msg.rpc_argp = session;
4784 msg.rpc_resp = NULL;
4785 msg.rpc_cred = NULL;
4786 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4787
4788 if (status)
4789 printk(KERN_WARNING
4790 "Got error %d from the server on DESTROY_SESSION. "
4791 "Session has been destroyed regardless...\n", status);
4792
4793 dprintk("<-- nfs4_proc_destroy_session\n");
4794 return status;
4795}
4796
fc01cea9
AA		 4797/*
4798 * Renew the cl_session lease.
4799 */
4800static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4801{
4802 struct nfs4_sequence_args args;
4803 struct nfs4_sequence_res res;
4804
4805 struct rpc_message msg = {
4806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4807 .rpc_argp = &args,
4808 .rpc_resp = &res,
4809 .rpc_cred = cred,
4810 };
4811
4812 args.sa_cache_this = 0;
4813
4814 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4815 &res, 0);
4816}
4817
4818void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4819{
4820 struct nfs_client *clp = (struct nfs_client *)data;
4821
4822 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4823
4824 if (task->tk_status < 0) {
4825 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4826
4827 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4828 == -EAGAIN) {
eedc020e 4829 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4830 return;
4831 }
4832 }
4833 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4834 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4835
4836 put_rpccred(task->tk_msg.rpc_cred);
4837 kfree(task->tk_msg.rpc_argp);
4838 kfree(task->tk_msg.rpc_resp);
4839
4840 dprintk("<-- %s\n", __func__);
4841}
4842
4843static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4844{
4845 struct nfs_client *clp;
4846 struct nfs4_sequence_args *args;
4847 struct nfs4_sequence_res *res;
4848
4849 clp = (struct nfs_client *)data;
4850 args = task->tk_msg.rpc_argp;
4851 res = task->tk_msg.rpc_resp;
4852
4853 if (nfs4_setup_sequence(clp, args, res, 0, task))
4854 return;
4855 rpc_call_start(task);
4856}
4857
4858static const struct rpc_call_ops nfs41_sequence_ops = {
4859 .rpc_call_done = nfs41_sequence_call_done,
4860 .rpc_call_prepare = nfs41_sequence_prepare,
4861};
4862
4863static int nfs41_proc_async_sequence(struct nfs_client *clp,
4864 struct rpc_cred *cred)
4865{
4866 struct nfs4_sequence_args *args;
4867 struct nfs4_sequence_res *res;
4868 struct rpc_message msg = {
4869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4870 .rpc_cred = cred,
4871 };
4872
4873 args = kzalloc(sizeof(*args), GFP_KERNEL);
4874 if (!args)
4875 return -ENOMEM;
4876 res = kzalloc(sizeof(*res), GFP_KERNEL);
4877 if (!res) {
4878 kfree(args);
4879 return -ENOMEM;
4880 }
4881 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4882 msg.rpc_argp = args;
4883 msg.rpc_resp = res;
4884
4885 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4886 &nfs41_sequence_ops, (void *)clp);
4887}
4888
557134a3
AA		 4889#endif /* CONFIG_NFS_V4_1 */
4890
591d71cb 4891struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4892 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4893 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4894 .recover_open = nfs4_open_reclaim,
4895 .recover_lock = nfs4_lock_reclaim,
591d71cb 4896 .establish_clid = nfs4_init_clientid,
90a16617 4897 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4898};
4899
591d71cb
AA		 4900#if defined(CONFIG_NFS_V4_1)
4901struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4902 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4903 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4904 .recover_open = nfs4_open_reclaim,
4905 .recover_lock = nfs4_lock_reclaim,
4906 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4907 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4908};
4909#endif /* CONFIG_NFS_V4_1 */
4910
4911struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4912 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4913 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4914 .recover_open = nfs4_open_expired,
4915 .recover_lock = nfs4_lock_expired,
4916 .establish_clid = nfs4_init_clientid,
90a16617 4917 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4918};
4919
4920#if defined(CONFIG_NFS_V4_1)
4921struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4922 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4923 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4924 .recover_open = nfs4_open_expired,
4925 .recover_lock = nfs4_lock_expired,
591d71cb 4926 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4927 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4928};
591d71cb 4929#endif /* CONFIG_NFS_V4_1 */
1da177e4 4930
29fba38b
BH		 4931struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4932 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4933 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4934 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4935};
4936
4937#if defined(CONFIG_NFS_V4_1)
4938struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4939 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4940 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4941 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4942};
4943#endif
4944
4945/*
4946 * Per minor version reboot and network partition recovery ops
4947 */
4948
591d71cb
AA		 4949struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4950 &nfs40_reboot_recovery_ops,
4951#if defined(CONFIG_NFS_V4_1)
4952 &nfs41_reboot_recovery_ops,
4953#endif
4954};
4955
4956struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4957 &nfs40_nograce_recovery_ops,
4958#if defined(CONFIG_NFS_V4_1)
4959 &nfs41_nograce_recovery_ops,
4960#endif
4961};
4962
29fba38b
BH		 4963struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4964 &nfs40_state_renewal_ops,
4965#if defined(CONFIG_NFS_V4_1)
4966 &nfs41_state_renewal_ops,
4967#endif
4968};
4969
92e1d5be 4970static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4971 .permission = nfs_permission,
4972 .getattr = nfs_getattr,
4973 .setattr = nfs_setattr,
4974 .getxattr = nfs4_getxattr,
4975 .setxattr = nfs4_setxattr,
4976 .listxattr = nfs4_listxattr,
4977};
4978
509de811 4979const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4980 .version = 4, /* protocol version */
4981 .dentry_ops = &nfs4_dentry_operations,
4982 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4983 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4984 .getroot = nfs4_proc_get_root,
4985 .getattr = nfs4_proc_getattr,
4986 .setattr = nfs4_proc_setattr,
2b3de441 4987 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4988 .lookup = nfs4_proc_lookup,
4989 .access = nfs4_proc_access,
4990 .readlink = nfs4_proc_readlink,
1da177e4
LT		 4991 .create = nfs4_proc_create,
4992 .remove = nfs4_proc_remove,
4993 .unlink_setup = nfs4_proc_unlink_setup,
4994 .unlink_done = nfs4_proc_unlink_done,
4995 .rename = nfs4_proc_rename,
4996 .link = nfs4_proc_link,
4997 .symlink = nfs4_proc_symlink,
4998 .mkdir = nfs4_proc_mkdir,
4999 .rmdir = nfs4_proc_remove,
5000 .readdir = nfs4_proc_readdir,
5001 .mknod = nfs4_proc_mknod,
5002 .statfs = nfs4_proc_statfs,
5003 .fsinfo = nfs4_proc_fsinfo,
5004 .pathconf = nfs4_proc_pathconf,
e9326dca 5005 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5006 .decode_dirent = nfs4_decode_dirent,
5007 .read_setup = nfs4_proc_read_setup,
ec06c096 5008 .read_done = nfs4_read_done,
1da177e4 5009 .write_setup = nfs4_proc_write_setup,
788e7a89 5010 .write_done = nfs4_write_done,
1da177e4 5011 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5012 .commit_done = nfs4_commit_done,
1da177e4 5013 .lock = nfs4_proc_lock,
e50a1c2e 5014 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5015 .close_context = nfs4_close_context,
1da177e4
LT		 5016};
5017
5018/*
5019 * Local variables:
5020 * c-basic-offset: 8
5021 * End:
5022 */
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