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NFSv4: Fix an NFSv4 mount regression
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
1da177e4 48#include <linux/namei.h>
02a913a7 49#include <linux/mount.h>
99fe60d0 50#include <linux/module.h>
5a0ffe54 51#include <linux/sunrpc/bc_xprt.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
cdd4e68b 64struct nfs4_opendata;
864472e9 65static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 66static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 67static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 68static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 70
1da177e4 71/* Prevent leaks of NFSv4 errors into userland */
46f72f57 72static int nfs4_map_errors(int err)
1da177e4
LT		 73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 76 __func__, -err);
1da177e4
LT		 77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
65de872e
TM		 198static int nfs4_wait_clnt_recover(struct nfs_client *clp)
199{
200 int res;
201
202 might_sleep();
203
e005e804 204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 205 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 206 return res;
207}
208
209static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
210{
211 int res = 0;
212
213 might_sleep();
214
215 if (*timeout <= 0)
216 *timeout = NFS4_POLL_RETRY_MIN;
217 if (*timeout > NFS4_POLL_RETRY_MAX)
218 *timeout = NFS4_POLL_RETRY_MAX;
219 schedule_timeout_killable(*timeout);
220 if (fatal_signal_pending(current))
221 res = -ERESTARTSYS;
222 *timeout <<= 1;
223 return res;
224}
225
226/* This is the error handling routine for processes that are allowed
227 * to sleep.
228 */
229static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
230{
231 struct nfs_client *clp = server->nfs_client;
9e33bed5 232 struct nfs4_state *state = exception->state;
65de872e
TM		 233 int ret = errorcode;
234
235 exception->retry = 0;
236 switch(errorcode) {
237 case 0:
238 return 0;
9e33bed5
TM		 239 case -NFS4ERR_ADMIN_REVOKED:
240 case -NFS4ERR_BAD_STATEID:
241 case -NFS4ERR_OPENMODE:
242 if (state == NULL)
243 break;
244 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 245 case -NFS4ERR_STALE_CLIENTID:
246 case -NFS4ERR_STALE_STATEID:
247 case -NFS4ERR_EXPIRED:
248 nfs4_schedule_state_recovery(clp);
249 ret = nfs4_wait_clnt_recover(clp);
250 if (ret == 0)
251 exception->retry = 1;
4745e315 252#if !defined(CONFIG_NFS_V4_1)
65de872e 253 break;
4745e315
AA		 254#else /* !defined(CONFIG_NFS_V4_1) */
255 if (!nfs4_has_session(server->nfs_client))
256 break;
257 /* FALLTHROUGH */
258 case -NFS4ERR_BADSESSION:
259 case -NFS4ERR_BADSLOT:
260 case -NFS4ERR_BAD_HIGH_SLOT:
261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
262 case -NFS4ERR_DEADSESSION:
263 case -NFS4ERR_SEQ_FALSE_RETRY:
264 case -NFS4ERR_SEQ_MISORDERED:
265 dprintk("%s ERROR: %d Reset session\n", __func__,
266 errorcode);
267 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
268 exception->retry = 1;
269 /* FALLTHROUGH */
270#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM		 271 case -NFS4ERR_FILE_OPEN:
272 case -NFS4ERR_GRACE:
273 case -NFS4ERR_DELAY:
274 ret = nfs4_delay(server->client, &exception->timeout);
275 if (ret != 0)
276 break;
277 case -NFS4ERR_OLD_STATEID:
278 exception->retry = 1;
279 }
280 /* We failed to handle the error */
281 return nfs4_map_errors(ret);
282}
283
284
26e976a8 285static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 286{
7539bbab 287 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 288 spin_lock(&clp->cl_lock);
289 if (time_before(clp->cl_last_renewal,timestamp))
290 clp->cl_last_renewal = timestamp;
291 spin_unlock(&clp->cl_lock);
292}
293
cccef3b9
AA		 294#if defined(CONFIG_NFS_V4_1)
295
e2c4ab3c
AA		 296/*
297 * nfs4_free_slot - free a slot and efficiently update slot table.
298 *
299 * freeing a slot is trivially done by clearing its respective bit
300 * in the bitmap.
301 * If the freed slotid equals highest_used_slotid we want to update it
302 * so that the server would be able to size down the slot table if needed,
303 * otherwise we know that the highest_used_slotid is still in use.
304 * When updating highest_used_slotid there may be "holes" in the bitmap
305 * so we need to scan down from highest_used_slotid to 0 looking for the now
306 * highest slotid in use.
307 * If none found, highest_used_slotid is set to -1.
308 */
309static void
310nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
311{
312 int slotid = free_slotid;
313
314 spin_lock(&tbl->slot_tbl_lock);
315 /* clear used bit in bitmap */
316 __clear_bit(slotid, tbl->used_slots);
317
318 /* update highest_used_slotid when it is freed */
319 if (slotid == tbl->highest_used_slotid) {
320 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
321 if (slotid >= 0 && slotid < tbl->max_slots)
322 tbl->highest_used_slotid = slotid;
323 else
324 tbl->highest_used_slotid = -1;
325 }
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 spin_unlock(&tbl->slot_tbl_lock);
328 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
329 free_slotid, tbl->highest_used_slotid);
330}
331
13615871
AA		 332void nfs41_sequence_free_slot(const struct nfs_client *clp,
333 struct nfs4_sequence_res *res)
334{
335 struct nfs4_slot_table *tbl;
336
337 if (!nfs4_has_session(clp)) {
338 dprintk("%s: No session\n", __func__);
339 return;
340 }
341 tbl = &clp->cl_session->fc_slot_table;
342 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
343 dprintk("%s: No slot\n", __func__);
344 /* just wake up the next guy waiting since
345 * we may have not consumed a slot after all */
346 rpc_wake_up_next(&tbl->slot_tbl_waitq);
347 return;
348 }
349 nfs4_free_slot(tbl, res->sr_slotid);
350 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
351}
352
b0df806c
AA		 353static void nfs41_sequence_done(struct nfs_client *clp,
354 struct nfs4_sequence_res *res,
355 int rpc_status)
356{
357 unsigned long timestamp;
358 struct nfs4_slot_table *tbl;
359 struct nfs4_slot *slot;
360
361 /*
362 * sr_status remains 1 if an RPC level error occurred. The server
363 * may or may not have processed the sequence operation..
364 * Proceed as if the server received and processed the sequence
365 * operation.
366 */
367 if (res->sr_status == 1)
368 res->sr_status = NFS_OK;
369
370 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
371 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
372 goto out;
373
374 tbl = &clp->cl_session->fc_slot_table;
375 slot = tbl->slots + res->sr_slotid;
376
377 if (res->sr_status == 0) {
378 /* Update the slot's sequence and clientid lease timer */
379 ++slot->seq_nr;
380 timestamp = res->sr_renewal_time;
381 spin_lock(&clp->cl_lock);
382 if (time_before(clp->cl_last_renewal, timestamp))
383 clp->cl_last_renewal = timestamp;
384 spin_unlock(&clp->cl_lock);
385 return;
386 }
387out:
388 /* The session may be reset by one of the error handlers. */
389 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
390 nfs41_sequence_free_slot(clp, res);
391}
392
510b8175
BH		 393/*
394 * nfs4_find_slot - efficiently look for a free slot
395 *
396 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
397 * If found, we mark the slot as used, update the highest_used_slotid,
398 * and respectively set up the sequence operation args.
399 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 400 *
401 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 402 */
403static u8
404nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
405{
406 int slotid;
407 u8 ret_id = NFS4_MAX_SLOT_TABLE;
408 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
409
510b8175
BH		 410 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
411 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
412 tbl->max_slots);
413 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
414 if (slotid >= tbl->max_slots)
415 goto out;
416 __set_bit(slotid, tbl->used_slots);
417 if (slotid > tbl->highest_used_slotid)
418 tbl->highest_used_slotid = slotid;
419 ret_id = slotid;
420out:
421 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
422 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 423 return ret_id;
424}
425
b069d94a
AA		 426static int nfs4_recover_session(struct nfs4_session *session)
427{
428 struct nfs_client *clp = session->clp;
429 int ret;
430
431 for (;;) {
432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret != 0)
434 return ret;
435 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
436 break;
437 nfs4_schedule_state_manager(clp);
438 }
439 return 0;
440}
441
ce5039c1
AA		 442static int nfs41_setup_sequence(struct nfs4_session *session,
443 struct nfs4_sequence_args *args,
444 struct nfs4_sequence_res *res,
445 int cache_reply,
446 struct rpc_task *task)
447{
fbcd4abc
AA		 448 struct nfs4_slot *slot;
449 struct nfs4_slot_table *tbl;
b069d94a 450 int status = 0;
fbcd4abc
AA		 451 u8 slotid;
452
453 dprintk("--> %s\n", __func__);
ce5039c1
AA		 454 /* slot already allocated? */
455 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
456 return 0;
457
458 memset(res, 0, sizeof(*res));
459 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 460 tbl = &session->fc_slot_table;
461
462 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 463 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
464 if (tbl->highest_used_slotid != -1) {
465 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
466 spin_unlock(&tbl->slot_tbl_lock);
467 dprintk("<-- %s: Session reset: draining\n", __func__);
468 return -EAGAIN;
469 }
470
471 /* The slot table is empty; start the reset thread */
472 dprintk("%s Session Reset\n", __func__);
473 spin_unlock(&tbl->slot_tbl_lock);
474 status = nfs4_recover_session(session);
475 if (status)
476 return status;
477 spin_lock(&tbl->slot_tbl_lock);
478 }
479
fbcd4abc
AA		 480 slotid = nfs4_find_slot(tbl, task);
481 if (slotid == NFS4_MAX_SLOT_TABLE) {
482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
483 spin_unlock(&tbl->slot_tbl_lock);
484 dprintk("<-- %s: no free slots\n", __func__);
485 return -EAGAIN;
486 }
487 spin_unlock(&tbl->slot_tbl_lock);
488
489 slot = tbl->slots + slotid;
99fe60d0 490 args->sa_session = session;
fbcd4abc
AA		 491 args->sa_slotid = slotid;
492 args->sa_cache_this = cache_reply;
493
494 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
495
99fe60d0 496 res->sr_session = session;
fbcd4abc
AA		 497 res->sr_slotid = slotid;
498 res->sr_renewal_time = jiffies;
499 /*
500 * sr_status is only set in decode_sequence, and so will remain
501 * set to 1 if an rpc level failure occurs.
502 */
503 res->sr_status = 1;
ce5039c1
AA		 504 return 0;
505}
506
507int nfs4_setup_sequence(struct nfs_client *clp,
508 struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res,
510 int cache_reply,
511 struct rpc_task *task)
512{
513 int ret = 0;
514
515 dprintk("--> %s clp %p session %p sr_slotid %d\n",
516 __func__, clp, clp->cl_session, res->sr_slotid);
517
518 if (!nfs4_has_session(clp))
519 goto out;
520 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
521 task);
522 if (ret != -EAGAIN) {
523 /* terminate rpc task */
524 task->tk_status = ret;
525 task->tk_action = NULL;
526 }
527out:
528 dprintk("<-- %s status=%d\n", __func__, ret);
529 return ret;
530}
531
532struct nfs41_call_sync_data {
533 struct nfs_client *clp;
534 struct nfs4_sequence_args *seq_args;
535 struct nfs4_sequence_res *seq_res;
536 int cache_reply;
537};
538
539static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
540{
541 struct nfs41_call_sync_data *data = calldata;
542
543 dprintk("--> %s data->clp->cl_session %p\n", __func__,
544 data->clp->cl_session);
545 if (nfs4_setup_sequence(data->clp, data->seq_args,
546 data->seq_res, data->cache_reply, task))
547 return;
548 rpc_call_start(task);
549}
550
69ab40c4
AA		 551static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
552{
553 struct nfs41_call_sync_data *data = calldata;
554
555 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556 nfs41_sequence_free_slot(data->clp, data->seq_res);
557}
558
ce5039c1
AA		 559struct rpc_call_ops nfs41_call_sync_ops = {
560 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 561 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 562};
563
564static int nfs4_call_sync_sequence(struct nfs_client *clp,
565 struct rpc_clnt *clnt,
566 struct rpc_message *msg,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 int cache_reply)
570{
571 int ret;
572 struct rpc_task *task;
573 struct nfs41_call_sync_data data = {
574 .clp = clp,
575 .seq_args = args,
576 .seq_res = res,
577 .cache_reply = cache_reply,
578 };
579 struct rpc_task_setup task_setup = {
580 .rpc_client = clnt,
581 .rpc_message = msg,
582 .callback_ops = &nfs41_call_sync_ops,
583 .callback_data = &data
584 };
585
586 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
587 task = rpc_run_task(&task_setup);
588 if (IS_ERR(task))
589 ret = PTR_ERR(task);
590 else {
591 ret = task->tk_status;
592 rpc_put_task(task);
593 }
594 return ret;
595}
596
cccef3b9
AA		 597int _nfs4_call_sync_session(struct nfs_server *server,
598 struct rpc_message *msg,
599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
601 int cache_reply)
602{
ce5039c1
AA		 603 return nfs4_call_sync_sequence(server->nfs_client, server->client,
604 msg, args, res, cache_reply);
cccef3b9
AA		 605}
606
607#endif /* CONFIG_NFS_V4_1 */
608
609int _nfs4_call_sync(struct nfs_server *server,
610 struct rpc_message *msg,
611 struct nfs4_sequence_args *args,
612 struct nfs4_sequence_res *res,
613 int cache_reply)
614{
f3752975 615 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 616 return rpc_call_sync(server->client, msg, 0);
617}
618
619#define nfs4_call_sync(server, msg, args, res, cache_reply) \
620 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
621 &(res)->seq_res, (cache_reply))
622
b0df806c
AA		 623static void nfs4_sequence_done(const struct nfs_server *server,
624 struct nfs4_sequence_res *res, int rpc_status)
625{
626#ifdef CONFIG_NFS_V4_1
627 if (nfs4_has_session(server->nfs_client))
628 nfs41_sequence_done(server->nfs_client, res, rpc_status);
629#endif /* CONFIG_NFS_V4_1 */
630}
631
632/* no restart, therefore free slot here */
633static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
634 struct nfs4_sequence_res *res,
635 int rpc_status)
636{
637 nfs4_sequence_done(server, res, rpc_status);
638 nfs4_sequence_free_slot(server->nfs_client, res);
639}
640
38478b24 641static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 642{
38478b24 643 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 644
38478b24 645 spin_lock(&dir->i_lock);
40d24704
TM		 646 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
647 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 648 nfs_force_lookup_revalidate(dir);
40d24704 649 nfsi->change_attr = cinfo->after;
38478b24 650 spin_unlock(&dir->i_lock);
1da177e4
LT		 651}
652
e56e0b78 653struct nfs4_opendata {
c6d00e63 654 struct kref kref;
e56e0b78
TM		 655 struct nfs_openargs o_arg;
656 struct nfs_openres o_res;
cdd4e68b
TM		 657 struct nfs_open_confirmargs c_arg;
658 struct nfs_open_confirmres c_res;
e56e0b78
TM		 659 struct nfs_fattr f_attr;
660 struct nfs_fattr dir_attr;
ad389da7 661 struct path path;
e56e0b78
TM		 662 struct dentry *dir;
663 struct nfs4_state_owner *owner;
aac00a8d 664 struct nfs4_state *state;
e56e0b78 665 struct iattr attrs;
26e976a8 666 unsigned long timestamp;
3e309914 667 unsigned int rpc_done : 1;
24ac23ab
TM		 668 int rpc_status;
669 int cancelled;
e56e0b78
TM		 670};
671
2ced46c2
TM		 672
673static void nfs4_init_opendata_res(struct nfs4_opendata *p)
674{
675 p->o_res.f_attr = &p->f_attr;
676 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 677 p->o_res.seqid = p->o_arg.seqid;
678 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 679 p->o_res.server = p->o_arg.server;
680 nfs_fattr_init(&p->f_attr);
681 nfs_fattr_init(&p->dir_attr);
578e4585 682 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
2ced46c2
TM		 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;
e56e0b78
TM		 714 if (flags & O_EXCL) {
715 u32 *s = (u32 *) p->o_arg.u.verifier.data;
716 s[0] = jiffies;
717 s[1] = current->pid;
718 } else if (flags & O_CREAT) {
719 p->o_arg.u.attrs = &p->attrs;
720 memcpy(&p->attrs, attrs, sizeof(p->attrs));
721 }
cdd4e68b
TM		 722 p->c_arg.fh = &p->o_res.fh;
723 p->c_arg.stateid = &p->o_res.stateid;
724 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 725 nfs4_init_opendata_res(p);
c6d00e63 726 kref_init(&p->kref);
e56e0b78
TM		 727 return p;
728err_free:
729 kfree(p);
730err:
731 dput(parent);
732 return NULL;
733}
734
c6d00e63 735static void nfs4_opendata_free(struct kref *kref)
e56e0b78 736{
c6d00e63
TM		 737 struct nfs4_opendata *p = container_of(kref,
738 struct nfs4_opendata, kref);
739
740 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 741 if (p->state != NULL)
742 nfs4_put_open_state(p->state);
c6d00e63
TM		 743 nfs4_put_state_owner(p->owner);
744 dput(p->dir);
31f31db1 745 path_put(&p->path);
c6d00e63
TM		 746 kfree(p);
747}
748
749static void nfs4_opendata_put(struct nfs4_opendata *p)
750{
751 if (p != NULL)
752 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 753}
754
06f814a3
TM		 755static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
756{
06f814a3
TM		 757 int ret;
758
06f814a3 759 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 760 return ret;
761}
762
dc0b027d 763static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 764{
765 int ret = 0;
dc0b027d
TM		 766
767 if (open_mode & O_EXCL)
768 goto out;
769 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 770 case FMODE_READ:
771 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 772 break;
773 case FMODE_WRITE:
774 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 775 break;
776 case FMODE_READ|FMODE_WRITE:
777 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
778 }
dc0b027d 779out:
6ee41268
TM		 780 return ret;
781}
782
dc0b027d 783static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 784{
dc0b027d 785 if ((delegation->type & fmode) != fmode)
aac00a8d 786 return 0;
15c831bf 787 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 788 return 0;
b7391f44 789 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 790 return 1;
791}
792
dc0b027d 793static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 794{
dc0b027d 795 switch (fmode) {
e7616923
TM		 796 case FMODE_WRITE:
797 state->n_wronly++;
798 break;
799 case FMODE_READ:
800 state->n_rdonly++;
801 break;
802 case FMODE_READ|FMODE_WRITE:
803 state->n_rdwr++;
804 }
dc0b027d 805 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 806}
807
dc0b027d 808static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 809{
810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
811 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
812 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 813 switch (fmode) {
003707c7
TM		 814 case FMODE_READ:
815 set_bit(NFS_O_RDONLY_STATE, &state->flags);
816 break;
817 case FMODE_WRITE:
818 set_bit(NFS_O_WRONLY_STATE, &state->flags);
819 break;
820 case FMODE_READ|FMODE_WRITE:
821 set_bit(NFS_O_RDWR_STATE, &state->flags);
822 }
e7616923
TM		 823}
824
dc0b027d 825static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 826{
8bda4e4c 827 write_seqlock(&state->seqlock);
dc0b027d 828 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 829 write_sequnlock(&state->seqlock);
003707c7
TM		 830}
831
dc0b027d 832static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 833{
8bda4e4c
TM		 834 /*
835 * Protect the call to nfs4_state_set_mode_locked and
836 * serialise the stateid update
837 */
838 write_seqlock(&state->seqlock);
003707c7
TM		 839 if (deleg_stateid != NULL) {
840 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
841 set_bit(NFS_DELEGATED_STATE, &state->flags);
842 }
843 if (open_stateid != NULL)
dc0b027d 844 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 845 write_sequnlock(&state->seqlock);
846 spin_lock(&state->owner->so_lock);
dc0b027d 847 update_open_stateflags(state, fmode);
ec073428 848 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 849}
850
dc0b027d 851static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 852{
853 struct nfs_inode *nfsi = NFS_I(state->inode);
854 struct nfs_delegation *deleg_cur;
855 int ret = 0;
856
dc0b027d 857 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 858
859 rcu_read_lock();
860 deleg_cur = rcu_dereference(nfsi->delegation);
861 if (deleg_cur == NULL)
862 goto no_delegation;
863
864 spin_lock(&deleg_cur->lock);
865 if (nfsi->delegation != deleg_cur ||
dc0b027d 866 (deleg_cur->type & fmode) != fmode)
34310430
TM		 867 goto no_delegation_unlock;
868
869 if (delegation == NULL)
870 delegation = &deleg_cur->stateid;
871 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
872 goto no_delegation_unlock;
873
b7391f44 874 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 875 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 876 ret = 1;
877no_delegation_unlock:
878 spin_unlock(&deleg_cur->lock);
879no_delegation:
880 rcu_read_unlock();
881
882 if (!ret && open_stateid != NULL) {
dc0b027d 883 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 884 ret = 1;
885 }
886
887 return ret;
888}
889
890
dc0b027d 891static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 892{
893 struct nfs_delegation *delegation;
894
895 rcu_read_lock();
896 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 897 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 898 rcu_read_unlock();
899 return;
900 }
901 rcu_read_unlock();
902 nfs_inode_return_delegation(inode);
903}
904
6ee41268 905static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 906{
907 struct nfs4_state *state = opendata->state;
908 struct nfs_inode *nfsi = NFS_I(state->inode);
909 struct nfs_delegation *delegation;
dc0b027d
TM		 910 int open_mode = opendata->o_arg.open_flags & O_EXCL;
911 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 912 nfs4_stateid stateid;
913 int ret = -EAGAIN;
914
aac00a8d 915 for (;;) {
dc0b027d 916 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 917 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 918 if (can_open_cached(state, fmode, open_mode)) {
919 update_open_stateflags(state, fmode);
6ee41268 920 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 921 goto out_return_state;
922 }
923 spin_unlock(&state->owner->so_lock);
924 }
34310430
TM		 925 rcu_read_lock();
926 delegation = rcu_dereference(nfsi->delegation);
927 if (delegation == NULL ||
dc0b027d 928 !can_open_delegated(delegation, fmode)) {
34310430 929 rcu_read_unlock();
aac00a8d 930 break;
34310430 931 }
aac00a8d
TM		 932 /* Save the delegation */
933 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
934 rcu_read_unlock();
af22f94a 935 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 936 if (ret != 0)
937 goto out;
938 ret = -EAGAIN;
34310430
TM		 939
940 /* Try to update the stateid using the delegation */
dc0b027d 941 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 942 goto out_return_state;
aac00a8d 943 }
aac00a8d
TM		 944out:
945 return ERR_PTR(ret);
946out_return_state:
947 atomic_inc(&state->count);
948 return state;
949}
950
24ac23ab
TM		 951static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
952{
953 struct inode *inode;
954 struct nfs4_state *state = NULL;
003707c7 955 struct nfs_delegation *delegation;
1b370bc2 956 int ret;
24ac23ab 957
aac00a8d 958 if (!data->rpc_done) {
6ee41268 959 state = nfs4_try_open_cached(data);
aac00a8d
TM		 960 goto out;
961 }
962
1b370bc2 963 ret = -EAGAIN;
24ac23ab 964 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 965 goto err;
24ac23ab 966 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 967 ret = PTR_ERR(inode);
03f28e3a 968 if (IS_ERR(inode))
1b370bc2
TM		 969 goto err;
970 ret = -ENOMEM;
24ac23ab
TM		 971 state = nfs4_get_open_state(inode, data->owner);
972 if (state == NULL)
1b370bc2 973 goto err_put_inode;
549d6ed5 974 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 975 int delegation_flags = 0;
976
003707c7
TM		 977 rcu_read_lock();
978 delegation = rcu_dereference(NFS_I(inode)->delegation);
979 if (delegation)
980 delegation_flags = delegation->flags;
981 rcu_read_unlock();
15c831bf 982 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 983 nfs_inode_set_delegation(state->inode,
984 data->owner->so_cred,
985 &data->o_res);
986 else
987 nfs_inode_reclaim_delegation(state->inode,
988 data->owner->so_cred,
989 &data->o_res);
990 }
34310430
TM		 991
992 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 993 data->o_arg.fmode);
24ac23ab 994 iput(inode);
aac00a8d 995out:
24ac23ab 996 return state;
1b370bc2
TM		 997err_put_inode:
998 iput(inode);
999err:
1000 return ERR_PTR(ret);
24ac23ab
TM		 1001}
1002
864472e9
TM		 1003static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1004{
1005 struct nfs_inode *nfsi = NFS_I(state->inode);
1006 struct nfs_open_context *ctx;
1007
1008 spin_lock(&state->inode->i_lock);
1009 list_for_each_entry(ctx, &nfsi->open_files, list) {
1010 if (ctx->state != state)
1011 continue;
1012 get_nfs_open_context(ctx);
1013 spin_unlock(&state->inode->i_lock);
1014 return ctx;
1015 }
1016 spin_unlock(&state->inode->i_lock);
1017 return ERR_PTR(-ENOENT);
1018}
1019
6f220ed5
TM		 1020static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1021{
1022 struct nfs4_opendata *opendata;
1023
dc0b027d 1024 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1025 if (opendata == NULL)
1026 return ERR_PTR(-ENOMEM);
1027 opendata->state = state;
1028 atomic_inc(&state->count);
1029 return opendata;
1030}
1031
dc0b027d 1032static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1033{
2ced46c2 1034 struct nfs4_state *newstate;
864472e9
TM		 1035 int ret;
1036
dc0b027d
TM		 1037 opendata->o_arg.open_flags = 0;
1038 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1039 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1040 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1041 nfs4_init_opendata_res(opendata);
864472e9
TM		 1042 ret = _nfs4_proc_open(opendata);
1043 if (ret != 0)
1044 return ret;
2ced46c2 1045 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1046 if (IS_ERR(newstate))
1047 return PTR_ERR(newstate);
dc0b027d 1048 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1049 *res = newstate;
864472e9
TM		 1050 return 0;
1051}
1052
1053static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1054{
864472e9 1055 struct nfs4_state *newstate;
864472e9
TM		 1056 int ret;
1057
1058 /* memory barrier prior to reading state->n_* */
2ced46c2 1059 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1060 smp_rmb();
1061 if (state->n_rdwr != 0) {
2ced46c2 1062 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1063 if (ret != 0)
1064 return ret;
2ced46c2
TM		 1065 if (newstate != state)
1066 return -ESTALE;
864472e9
TM		 1067 }
1068 if (state->n_wronly != 0) {
2ced46c2 1069 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1070 if (ret != 0)
1071 return ret;
2ced46c2
TM		 1072 if (newstate != state)
1073 return -ESTALE;
864472e9
TM		 1074 }
1075 if (state->n_rdonly != 0) {
2ced46c2 1076 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1077 if (ret != 0)
1078 return ret;
2ced46c2
TM		 1079 if (newstate != state)
1080 return -ESTALE;
864472e9 1081 }
1ac7e2fd
TM		 1082 /*
1083 * We may have performed cached opens for all three recoveries.
1084 * Check if we need to update the current stateid.
1085 */
1086 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1087 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1088 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1089 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1090 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1091 write_sequnlock(&state->seqlock);
1ac7e2fd 1092 }
864472e9
TM		 1093 return 0;
1094}
1095
1da177e4
LT		 1096/*
1097 * OPEN_RECLAIM:
1098 * reclaim state on the server after a reboot.
1da177e4 1099 */
539cd03a 1100static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1101{
1ac7e2fd 1102 struct nfs_delegation *delegation;
864472e9 1103 struct nfs4_opendata *opendata;
dc0b027d 1104 fmode_t delegation_type = 0;
1da177e4
LT		 1105 int status;
1106
6f220ed5
TM		 1107 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1108 if (IS_ERR(opendata))
1109 return PTR_ERR(opendata);
864472e9
TM		 1110 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1111 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1112 rcu_read_lock();
1113 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1114 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1115 delegation_type = delegation->type;
1ac7e2fd 1116 rcu_read_unlock();
864472e9
TM		 1117 opendata->o_arg.u.delegation_type = delegation_type;
1118 status = nfs4_open_recover(opendata, state);
c6d00e63 1119 nfs4_opendata_put(opendata);
1da177e4
LT		 1120 return status;
1121}
1122
539cd03a 1123static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1124{
1125 struct nfs_server *server = NFS_SERVER(state->inode);
1126 struct nfs4_exception exception = { };
1127 int err;
1128 do {
539cd03a 1129 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1130 if (err != -NFS4ERR_DELAY)
1131 break;
1132 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1133 } while (exception.retry);
1134 return err;
1135}
1136
864472e9
TM		 1137static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1138{
1139 struct nfs_open_context *ctx;
1140 int ret;
1141
1142 ctx = nfs4_state_find_open_context(state);
1143 if (IS_ERR(ctx))
1144 return PTR_ERR(ctx);
539cd03a 1145 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1146 put_nfs_open_context(ctx);
1147 return ret;
1148}
1149
13437e12 1150static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1151{
e56e0b78 1152 struct nfs4_opendata *opendata;
864472e9 1153 int ret;
1da177e4 1154
6f220ed5
TM		 1155 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1156 if (IS_ERR(opendata))
1157 return PTR_ERR(opendata);
e56e0b78 1158 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1159 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1160 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1161 ret = nfs4_open_recover(opendata, state);
c6d00e63 1162 nfs4_opendata_put(opendata);
864472e9 1163 return ret;
1da177e4
LT		 1164}
1165
13437e12 1166int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1167{
1168 struct nfs4_exception exception = { };
539cd03a 1169 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1170 int err;
1171 do {
13437e12 1172 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1173 switch (err) {
1174 case 0:
965b5d67
TM		 1175 case -ENOENT:
1176 case -ESTALE:
1177 goto out;
1da177e4
LT		 1178 case -NFS4ERR_STALE_CLIENTID:
1179 case -NFS4ERR_STALE_STATEID:
1180 case -NFS4ERR_EXPIRED:
1181 /* Don't recall a delegation if it was lost */
7539bbab 1182 nfs4_schedule_state_recovery(server->nfs_client);
965b5d67
TM		 1183 goto out;
1184 case -ERESTARTSYS:
1185 /*
1186 * The show must go on: exit, but mark the
1187 * stateid as needing recovery.
1188 */
1189 case -NFS4ERR_ADMIN_REVOKED:
1190 case -NFS4ERR_BAD_STATEID:
1191 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1192 case -ENOMEM:
1193 err = 0;
1194 goto out;
1da177e4
LT		 1195 }
1196 err = nfs4_handle_exception(server, err, &exception);
1197 } while (exception.retry);
965b5d67 1198out:
1da177e4
LT		 1199 return err;
1200}
1201
cdd4e68b
TM		 1202static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1203{
1204 struct nfs4_opendata *data = calldata;
1205
1206 data->rpc_status = task->tk_status;
1207 if (RPC_ASSASSINATED(task))
1208 return;
26e976a8 1209 if (data->rpc_status == 0) {
cdd4e68b
TM		 1210 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1211 sizeof(data->o_res.stateid.data));
bb22629e 1212 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1213 renew_lease(data->o_res.server, data->timestamp);
3e309914 1214 data->rpc_done = 1;
26e976a8 1215 }
cdd4e68b
TM		 1216}
1217
1218static void nfs4_open_confirm_release(void *calldata)
1219{
1220 struct nfs4_opendata *data = calldata;
1221 struct nfs4_state *state = NULL;
1222
1223 /* If this request hasn't been cancelled, do nothing */
1224 if (data->cancelled == 0)
1225 goto out_free;
1226 /* In case of error, no cleanup! */
3e309914 1227 if (!data->rpc_done)
cdd4e68b 1228 goto out_free;
cdd4e68b 1229 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1230 if (!IS_ERR(state))
dc0b027d 1231 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1232out_free:
c6d00e63 1233 nfs4_opendata_put(data);
cdd4e68b
TM		 1234}
1235
1236static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1237 .rpc_call_done = nfs4_open_confirm_done,
1238 .rpc_release = nfs4_open_confirm_release,
1239};
1240
1241/*
1242 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1243 */
1244static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1245{
1246 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1247 struct rpc_task *task;
5138fde0
TM		 1248 struct rpc_message msg = {
1249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1250 .rpc_argp = &data->c_arg,
1251 .rpc_resp = &data->c_res,
1252 .rpc_cred = data->owner->so_cred,
1253 };
c970aa85
TM		 1254 struct rpc_task_setup task_setup_data = {
1255 .rpc_client = server->client,
5138fde0 1256 .rpc_message = &msg,
c970aa85
TM		 1257 .callback_ops = &nfs4_open_confirm_ops,
1258 .callback_data = data,
101070ca 1259 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1260 .flags = RPC_TASK_ASYNC,
1261 };
1da177e4
LT		 1262 int status;
1263
c6d00e63 1264 kref_get(&data->kref);
3e309914
TM		 1265 data->rpc_done = 0;
1266 data->rpc_status = 0;
5138fde0 1267 data->timestamp = jiffies;
c970aa85 1268 task = rpc_run_task(&task_setup_data);
7a1218a2 1269 if (IS_ERR(task))
cdd4e68b 1270 return PTR_ERR(task);
cdd4e68b
TM		 1271 status = nfs4_wait_for_completion_rpc_task(task);
1272 if (status != 0) {
1273 data->cancelled = 1;
1274 smp_wmb();
1275 } else
1276 status = data->rpc_status;
e6b3c4db 1277 rpc_put_task(task);
1da177e4
LT		 1278 return status;
1279}
1280
24ac23ab 1281static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1282{
24ac23ab
TM		 1283 struct nfs4_opendata *data = calldata;
1284 struct nfs4_state_owner *sp = data->owner;
5138fde0 1285
24ac23ab
TM		 1286 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1287 return;
aac00a8d
TM		 1288 /*
1289 * Check if we still need to send an OPEN call, or if we can use
1290 * a delegation instead.
1291 */
1292 if (data->state != NULL) {
1293 struct nfs_delegation *delegation;
1294
dc0b027d 1295 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1296 goto out_no_action;
aac00a8d
TM		 1297 rcu_read_lock();
1298 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1299 if (delegation != NULL &&
15c831bf 1300 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1301 rcu_read_unlock();
6ee41268 1302 goto out_no_action;
aac00a8d
TM		 1303 }
1304 rcu_read_unlock();
1305 }
24ac23ab 1306 /* Update sequence id. */
9f958ab8 1307 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1308 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1309 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1310 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1311 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1312 }
26e976a8 1313 data->timestamp = jiffies;
d898528c
AA		 1314 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1315 &data->o_arg.seq_args,
1316 &data->o_res.seq_res, 1, task))
1317 return;
5138fde0 1318 rpc_call_start(task);
6ee41268
TM		 1319 return;
1320out_no_action:
1321 task->tk_action = NULL;
1322
24ac23ab 1323}
1da177e4 1324
24ac23ab
TM		 1325static void nfs4_open_done(struct rpc_task *task, void *calldata)
1326{
1327 struct nfs4_opendata *data = calldata;
1da177e4 1328
24ac23ab 1329 data->rpc_status = task->tk_status;
d898528c
AA		 1330
1331 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1332 task->tk_status);
1333
24ac23ab
TM		 1334 if (RPC_ASSASSINATED(task))
1335 return;
1336 if (task->tk_status == 0) {
1337 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1338 case S_IFREG:
1339 break;
1340 case S_IFLNK:
24ac23ab 1341 data->rpc_status = -ELOOP;
6f926b5b
TM		 1342 break;
1343 case S_IFDIR:
24ac23ab 1344 data->rpc_status = -EISDIR;
6f926b5b
TM		 1345 break;
1346 default:
24ac23ab 1347 data->rpc_status = -ENOTDIR;
6f926b5b 1348 }
26e976a8 1349 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1350 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1351 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1352 }
3e309914 1353 data->rpc_done = 1;
24ac23ab 1354}
6f926b5b 1355
24ac23ab
TM		 1356static void nfs4_open_release(void *calldata)
1357{
1358 struct nfs4_opendata *data = calldata;
1359 struct nfs4_state *state = NULL;
1360
1361 /* If this request hasn't been cancelled, do nothing */
1362 if (data->cancelled == 0)
1363 goto out_free;
1364 /* In case of error, no cleanup! */
3e309914 1365 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1366 goto out_free;
1367 /* In case we need an open_confirm, no cleanup! */
1368 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1369 goto out_free;
24ac23ab 1370 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1371 if (!IS_ERR(state))
dc0b027d 1372 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1373out_free:
c6d00e63 1374 nfs4_opendata_put(data);
24ac23ab
TM		 1375}
1376
1377static const struct rpc_call_ops nfs4_open_ops = {
1378 .rpc_call_prepare = nfs4_open_prepare,
1379 .rpc_call_done = nfs4_open_done,
1380 .rpc_release = nfs4_open_release,
1381};
1382
1383/*
1384 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1385 */
1386static int _nfs4_proc_open(struct nfs4_opendata *data)
1387{
1388 struct inode *dir = data->dir->d_inode;
1389 struct nfs_server *server = NFS_SERVER(dir);
1390 struct nfs_openargs *o_arg = &data->o_arg;
1391 struct nfs_openres *o_res = &data->o_res;
1392 struct rpc_task *task;
5138fde0
TM		 1393 struct rpc_message msg = {
1394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1395 .rpc_argp = o_arg,
1396 .rpc_resp = o_res,
1397 .rpc_cred = data->owner->so_cred,
1398 };
c970aa85
TM		 1399 struct rpc_task_setup task_setup_data = {
1400 .rpc_client = server->client,
5138fde0 1401 .rpc_message = &msg,
c970aa85
TM		 1402 .callback_ops = &nfs4_open_ops,
1403 .callback_data = data,
101070ca 1404 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1405 .flags = RPC_TASK_ASYNC,
1406 };
24ac23ab
TM		 1407 int status;
1408
c6d00e63 1409 kref_get(&data->kref);
3e309914
TM		 1410 data->rpc_done = 0;
1411 data->rpc_status = 0;
2ced46c2 1412 data->cancelled = 0;
c970aa85 1413 task = rpc_run_task(&task_setup_data);
7a1218a2 1414 if (IS_ERR(task))
24ac23ab 1415 return PTR_ERR(task);
24ac23ab
TM		 1416 status = nfs4_wait_for_completion_rpc_task(task);
1417 if (status != 0) {
1418 data->cancelled = 1;
1419 smp_wmb();
1420 } else
1421 status = data->rpc_status;
e6b3c4db 1422 rpc_put_task(task);
3e309914 1423 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1424 return status;
1425
9936781d
TM		 1426 if (o_res->fh.size == 0)
1427 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1428
56ae19f3
TM		 1429 if (o_arg->open_flags & O_CREAT) {
1430 update_changeattr(dir, &o_res->cinfo);
1431 nfs_post_op_update_inode(dir, o_res->dir_attr);
1432 } else
1433 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1434 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1435 status = _nfs4_proc_open_confirm(data);
1da177e4 1436 if (status != 0)
24ac23ab 1437 return status;
1da177e4
LT		 1438 }
1439 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1440 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1441 return 0;
1da177e4
LT		 1442}
1443
10afec90 1444static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1445{
7539bbab 1446 struct nfs_client *clp = server->nfs_client;
6b30954e 1447 int ret;
58d9714a 1448
6b30954e 1449 for (;;) {
65de872e 1450 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1451 if (ret != 0)
1452 return ret;
e598d843
TM		 1453 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1454 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1455 break;
58d9714a 1456 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1457 }
1458 return 0;
58d9714a
TM		 1459}
1460
1da177e4
LT		 1461/*
1462 * OPEN_EXPIRED:
1463 * reclaim state on the server after a network partition.
1464 * Assumes caller holds the appropriate lock
1465 */
539cd03a 1466static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1467{
e56e0b78 1468 struct nfs4_opendata *opendata;
864472e9 1469 int ret;
1da177e4 1470
6f220ed5
TM		 1471 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1472 if (IS_ERR(opendata))
1473 return PTR_ERR(opendata);
864472e9 1474 ret = nfs4_open_recover(opendata, state);
35d05778 1475 if (ret == -ESTALE)
539cd03a 1476 d_drop(ctx->path.dentry);
c6d00e63 1477 nfs4_opendata_put(opendata);
864472e9 1478 return ret;
1da177e4
LT		 1479}
1480
539cd03a 1481static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1482{
539cd03a 1483 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1484 struct nfs4_exception exception = { };
1485 int err;
1486
1487 do {
539cd03a 1488 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1489 if (err != -NFS4ERR_DELAY)
1490 break;
1491 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1492 } while (exception.retry);
1493 return err;
1494}
1495
1da177e4
LT		 1496static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1497{
1da177e4 1498 struct nfs_open_context *ctx;
864472e9 1499 int ret;
1da177e4 1500
864472e9
TM		 1501 ctx = nfs4_state_find_open_context(state);
1502 if (IS_ERR(ctx))
1503 return PTR_ERR(ctx);
539cd03a 1504 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1505 put_nfs_open_context(ctx);
1506 return ret;
1da177e4
LT		 1507}
1508
aa53ed54
JL		 1509/*
1510 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1511 * fields corresponding to attributes that were used to store the verifier.
1512 * Make sure we clobber those fields in the later setattr call
1513 */
1514static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1515{
1516 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1517 !(sattr->ia_valid & ATTR_ATIME_SET))
1518 sattr->ia_valid |= ATTR_ATIME;
1519
1520 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1521 !(sattr->ia_valid & ATTR_MTIME_SET))
1522 sattr->ia_valid |= ATTR_MTIME;
1523}
1524
1da177e4 1525/*
24ac23ab 1526 * Returns a referenced nfs4_state
1da177e4 1527 */
dc0b027d 1528static 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		 1529{
1530 struct nfs4_state_owner *sp;
1531 struct nfs4_state *state = NULL;
1532 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1533 struct nfs4_opendata *opendata;
aac00a8d 1534 int status;
1da177e4
LT		 1535
1536 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1537 status = -ENOMEM;
1538 if (!(sp = nfs4_get_state_owner(server, cred))) {
1539 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1540 goto out_err;
1541 }
58d9714a
TM		 1542 status = nfs4_recover_expired_lease(server);
1543 if (status != 0)
b4454fe1 1544 goto err_put_state_owner;
aac00a8d 1545 if (path->dentry->d_inode != NULL)
dc0b027d 1546 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1547 status = -ENOMEM;
dc0b027d 1548 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1549 if (opendata == NULL)
95d35cb4 1550 goto err_put_state_owner;
1da177e4 1551
aac00a8d
TM		 1552 if (path->dentry->d_inode != NULL)
1553 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1554
24ac23ab 1555 status = _nfs4_proc_open(opendata);
1da177e4 1556 if (status != 0)
c6d00e63 1557 goto err_opendata_put;
1da177e4 1558
aa53ed54
JL		 1559 if (opendata->o_arg.open_flags & O_EXCL)
1560 nfs4_exclusive_attrset(opendata, sattr);
1561
24ac23ab 1562 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1563 status = PTR_ERR(state);
1564 if (IS_ERR(state))
c6d00e63 1565 goto err_opendata_put;
c6d00e63 1566 nfs4_opendata_put(opendata);
1da177e4 1567 nfs4_put_state_owner(sp);
1da177e4
LT		 1568 *res = state;
1569 return 0;
c6d00e63
TM		 1570err_opendata_put:
1571 nfs4_opendata_put(opendata);
e56e0b78
TM		 1572err_put_state_owner:
1573 nfs4_put_state_owner(sp);
1da177e4 1574out_err:
1da177e4
LT		 1575 *res = NULL;
1576 return status;
1577}
1578
1579
dc0b027d 1580static 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		 1581{
1582 struct nfs4_exception exception = { };
1583 struct nfs4_state *res;
1584 int status;
1585
1586 do {
dc0b027d 1587 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1588 if (status == 0)
1589 break;
1590 /* NOTE: BAD_SEQID means the server and client disagree about the
1591 * book-keeping w.r.t. state-changing operations
1592 * (OPEN/CLOSE/LOCK/LOCKU...)
1593 * It is actually a sign of a bug on the client or on the server.
1594 *
1595 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1596 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1597 * have unhashed the old state_owner for us, and that we can
1598 * therefore safely retry using a new one. We should still warn
1599 * the user though...
1600 */
1601 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1602 printk(KERN_WARNING "NFS: v4 server %s "
1603 " returned a bad sequence-id error!\n",
1604 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1605 exception.retry = 1;
1606 continue;
1607 }
550f5747
TM		 1608 /*
1609 * BAD_STATEID on OPEN means that the server cancelled our
1610 * state before it received the OPEN_CONFIRM.
1611 * Recover by retrying the request as per the discussion
1612 * on Page 181 of RFC3530.
1613 */
1614 if (status == -NFS4ERR_BAD_STATEID) {
1615 exception.retry = 1;
1616 continue;
1617 }
aac00a8d
TM		 1618 if (status == -EAGAIN) {
1619 /* We must have found a delegation */
1620 exception.retry = 1;
1621 continue;
1622 }
1da177e4
LT		 1623 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1624 status, &exception));
1625 } while (exception.retry);
1626 return res;
1627}
1628
659bfcd6
TM		 1629static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1630 struct nfs_fattr *fattr, struct iattr *sattr,
1631 struct nfs4_state *state)
1da177e4 1632{
3e4f6290 1633 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1634 struct nfs_setattrargs arg = {
3e4f6290 1635 .fh = NFS_FH(inode),
1da177e4
LT		 1636 .iap = sattr,
1637 .server = server,
1638 .bitmask = server->attr_bitmask,
1639 };
1640 struct nfs_setattrres res = {
1641 .fattr = fattr,
1642 .server = server,
1643 };
1644 struct rpc_message msg = {
659bfcd6
TM		 1645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1646 .rpc_argp = &arg,
1647 .rpc_resp = &res,
1648 .rpc_cred = cred,
1da177e4 1649 };
26e976a8 1650 unsigned long timestamp = jiffies;
65e4308d 1651 int status;
1da177e4 1652
0e574af1 1653 nfs_fattr_init(fattr);
1da177e4 1654
3e4f6290
TM		 1655 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1656 /* Use that stateid */
1657 } else if (state != NULL) {
08e9eac4
TM		 1658 nfs4_copy_stateid(&arg.stateid, state, current->files);
1659 } else
1da177e4
LT		 1660 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1661
cccef3b9 1662 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1663 if (status == 0 && state != NULL)
1664 renew_lease(server, timestamp);
65e4308d 1665 return status;
1da177e4
LT		 1666}
1667
659bfcd6
TM		 1668static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1669 struct nfs_fattr *fattr, struct iattr *sattr,
1670 struct nfs4_state *state)
1da177e4 1671{
3e4f6290 1672 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1673 struct nfs4_exception exception = { };
1674 int err;
1675 do {
1676 err = nfs4_handle_exception(server,
659bfcd6 1677 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1678 &exception);
1679 } while (exception.retry);
1680 return err;
1681}
1682
1683struct nfs4_closedata {
4a35bd41 1684 struct path path;
1da177e4
LT		 1685 struct inode *inode;
1686 struct nfs4_state *state;
1687 struct nfs_closeargs arg;
1688 struct nfs_closeres res;
516a6af6 1689 struct nfs_fattr fattr;
26e976a8 1690 unsigned long timestamp;
1da177e4
LT		 1691};
1692
963d8fe5 1693static void nfs4_free_closedata(void *data)
9512135d 1694{
963d8fe5
TM		 1695 struct nfs4_closedata *calldata = data;
1696 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1697
1698 nfs4_put_open_state(calldata->state);
1699 nfs_free_seqid(calldata->arg.seqid);
9512135d 1700 nfs4_put_state_owner(sp);
31f31db1 1701 path_put(&calldata->path);
9512135d
TM		 1702 kfree(calldata);
1703}
1704
963d8fe5 1705static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1706{
963d8fe5 1707 struct nfs4_closedata *calldata = data;
1da177e4 1708 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1709 struct nfs_server *server = NFS_SERVER(calldata->inode);
1710
19ddab06 1711 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1712 if (RPC_ASSASSINATED(task))
1713 return;
1da177e4
LT		 1714 /* hmm. we are done with the inode, and in the process of freeing
1715 * the state_owner. we keep this around to process errors
1716 */
1da177e4
LT		 1717 switch (task->tk_status) {
1718 case 0:
45328c35 1719 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1720 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1721 break;
1722 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1723 case -NFS4ERR_OLD_STATEID:
1724 case -NFS4ERR_BAD_STATEID:
1da177e4 1725 case -NFS4ERR_EXPIRED:
dc0b027d 1726 if (calldata->arg.fmode == 0)
9e33bed5 1727 break;
1da177e4 1728 default:
9e33bed5 1729 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1730 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1731 return;
1732 }
1733 }
19ddab06 1734 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1735 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1736}
1737
4ce70ada 1738static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1739{
4ce70ada 1740 struct nfs4_closedata *calldata = data;
9512135d 1741 struct nfs4_state *state = calldata->state;
003707c7 1742 int clear_rd, clear_wr, clear_rdwr;
9512135d 1743
963d8fe5 1744 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1745 return;
003707c7 1746
003707c7 1747 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1748 spin_lock(&state->owner->so_lock);
003707c7 1749 /* Calculate the change in open mode */
e7616923 1750 if (state->n_rdwr == 0) {
003707c7 1751 if (state->n_rdonly == 0) {
003707c7
TM		 1752 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1753 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1754 }
1755 if (state->n_wronly == 0) {
003707c7
TM		 1756 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1757 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1758 }
e7616923 1759 }
4cecb76f 1760 spin_unlock(&state->owner->so_lock);
003707c7 1761 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1762 /* Note: exit _without_ calling nfs4_close_done */
1763 task->tk_action = NULL;
9512135d
TM		 1764 return;
1765 }
516a6af6 1766 nfs_fattr_init(calldata->res.fattr);
45328c35 1767 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1768 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1769 calldata->arg.fmode = FMODE_READ;
45328c35 1770 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1771 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1772 calldata->arg.fmode = FMODE_WRITE;
45328c35 1773 }
26e976a8 1774 calldata->timestamp = jiffies;
19ddab06
AA		 1775 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1776 &calldata->arg.seq_args, &calldata->res.seq_res,
1777 1, task))
1778 return;
5138fde0 1779 rpc_call_start(task);
1da177e4
LT		 1780}
1781
963d8fe5 1782static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1783 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1784 .rpc_call_done = nfs4_close_done,
1785 .rpc_release = nfs4_free_closedata,
1786};
1787
1da177e4
LT		 1788/*
1789 * It is possible for data to be read/written from a mem-mapped file
1790 * after the sys_close call (which hits the vfs layer as a flush).
1791 * This means that we can't safely call nfsv4 close on a file until
1792 * the inode is cleared. This in turn means that we are not good
1793 * NFSv4 citizens - we do not indicate to the server to update the file's
1794 * share state even when we are done with one of the three share
1795 * stateid's in the inode.
1796 *
1797 * NOTE: Caller must be holding the sp->so_owner semaphore!
1798 */
a49c3c77 1799int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1800{
4a35bd41 1801 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1802 struct nfs4_closedata *calldata;
b39e625b
TM		 1803 struct nfs4_state_owner *sp = state->owner;
1804 struct rpc_task *task;
5138fde0
TM		 1805 struct rpc_message msg = {
1806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1807 .rpc_cred = state->owner->so_cred,
1808 };
c970aa85
TM		 1809 struct rpc_task_setup task_setup_data = {
1810 .rpc_client = server->client,
5138fde0 1811 .rpc_message = &msg,
c970aa85 1812 .callback_ops = &nfs4_close_ops,
101070ca 1813 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1814 .flags = RPC_TASK_ASYNC,
1815 };
9512135d 1816 int status = -ENOMEM;
1da177e4 1817
19ddab06 1818 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1819 if (calldata == NULL)
9512135d 1820 goto out;
4a35bd41 1821 calldata->inode = state->inode;
1da177e4 1822 calldata->state = state;
4a35bd41 1823 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1824 calldata->arg.stateid = &state->open_stateid;
34dc1ad7
BH		 1825 if (nfs4_has_session(server->nfs_client))
1826 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1da177e4 1827 /* Serialization for the sequence id */
cee54fc9 1828 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1829 if (calldata->arg.seqid == NULL)
1830 goto out_free_calldata;
dc0b027d 1831 calldata->arg.fmode = 0;
a65318bf 1832 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1833 calldata->res.fattr = &calldata->fattr;
c1d51931 1834 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1835 calldata->res.server = server;
5f7dbd5c 1836 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1837 calldata->path.mnt = mntget(path->mnt);
1838 calldata->path.dentry = dget(path->dentry);
9512135d 1839
5138fde0
TM		 1840 msg.rpc_argp = &calldata->arg,
1841 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1842 task_setup_data.callback_data = calldata;
1843 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1844 if (IS_ERR(task))
1845 return PTR_ERR(task);
a49c3c77
TM		 1846 status = 0;
1847 if (wait)
1848 status = rpc_wait_for_completion_task(task);
b39e625b 1849 rpc_put_task(task);
a49c3c77 1850 return status;
9512135d
TM		 1851out_free_calldata:
1852 kfree(calldata);
1853out:
b39e625b
TM		 1854 nfs4_put_open_state(state);
1855 nfs4_put_state_owner(sp);
9512135d 1856 return status;
1da177e4
LT		 1857}
1858
dc0b027d 1859static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1860{
1861 struct file *filp;
1b45c46c 1862 int ret;
02a913a7 1863
1b45c46c 1864 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1865 if (fmode & FMODE_EXEC) {
af22f94a 1866 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1867 state->owner->so_cred,
1868 nd->intent.open.flags);
1869 if (ret < 0)
1870 goto out_close;
1871 }
4a35bd41 1872 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1873 if (!IS_ERR(filp)) {
1874 struct nfs_open_context *ctx;
cd3758e3 1875 ctx = nfs_file_open_context(filp);
02a913a7 1876 ctx->state = state;
95cf959b
TM		 1877 return 0;
1878 }
1b45c46c
TM		 1879 ret = PTR_ERR(filp);
1880out_close:
dc0b027d 1881 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1882 return ret;
02a913a7
TM		 1883}
1884
1885struct dentry *
1da177e4
LT		 1886nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1887{
ad389da7 1888 struct path path = {
4ac91378 1889 .mnt = nd->path.mnt,
ad389da7
TM		 1890 .dentry = dentry,
1891 };
4ac91378 1892 struct dentry *parent;
1da177e4
LT		 1893 struct iattr attr;
1894 struct rpc_cred *cred;
1895 struct nfs4_state *state;
02a913a7 1896 struct dentry *res;
dc0b027d 1897 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1898
1899 if (nd->flags & LOOKUP_CREATE) {
1900 attr.ia_mode = nd->intent.open.create_mode;
1901 attr.ia_valid = ATTR_MODE;
1902 if (!IS_POSIXACL(dir))
ce3b0f8d 1903 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1904 } else {
1905 attr.ia_valid = 0;
1906 BUG_ON(nd->intent.open.flags & O_CREAT);
1907 }
1908
98a8e323 1909 cred = rpc_lookup_cred();
1da177e4 1910 if (IS_ERR(cred))
02a913a7 1911 return (struct dentry *)cred;
565277f6
TM		 1912 parent = dentry->d_parent;
1913 /* Protect against concurrent sillydeletes */
1914 nfs_block_sillyrename(parent);
dc0b027d 1915 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1916 put_rpccred(cred);
02a913a7 1917 if (IS_ERR(state)) {
d75340cc 1918 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1919 d_add(dentry, NULL);
d75340cc
TM		 1920 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1921 }
565277f6 1922 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1923 return (struct dentry *)state;
1924 }
24ac23ab 1925 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1926 if (res != NULL)
deee9369 1927 path.dentry = res;
d75340cc 1928 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1929 nfs_unblock_sillyrename(parent);
dc0b027d 1930 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1931 return res;
1da177e4
LT		 1932}
1933
1934int
02a913a7 1935nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1936{
ad389da7 1937 struct path path = {
4ac91378 1938 .mnt = nd->path.mnt,
ad389da7
TM		 1939 .dentry = dentry,
1940 };
1da177e4
LT		 1941 struct rpc_cred *cred;
1942 struct nfs4_state *state;
dc0b027d 1943 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1944
98a8e323 1945 cred = rpc_lookup_cred();
1da177e4
LT		 1946 if (IS_ERR(cred))
1947 return PTR_ERR(cred);
dc0b027d 1948 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1949 put_rpccred(cred);
02a913a7
TM		 1950 if (IS_ERR(state)) {
1951 switch (PTR_ERR(state)) {
1952 case -EPERM:
1953 case -EACCES:
1954 case -EDQUOT:
1955 case -ENOSPC:
1956 case -EROFS:
1957 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1958 return 1;
b87c0adf
CL		 1959 default:
1960 goto out_drop;
02a913a7 1961 }
02a913a7 1962 }
24ac23ab 1963 if (state->inode == dentry->d_inode) {
d75340cc 1964 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1965 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1966 return 1;
1967 }
dc0b027d 1968 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1969out_drop:
1970 d_drop(dentry);
1da177e4
LT		 1971 return 0;
1972}
1973
7fe5c398
TM		 1974void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1975{
1976 if (ctx->state == NULL)
1977 return;
1978 if (is_sync)
1979 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1980 else
1981 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1982}
1da177e4
LT		 1983
1984static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1985{
43652ad5
BH		 1986 struct nfs4_server_caps_arg args = {
1987 .fhandle = fhandle,
1988 };
1da177e4
LT		 1989 struct nfs4_server_caps_res res = {};
1990 struct rpc_message msg = {
1991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1992 .rpc_argp = &args,
1da177e4
LT		 1993 .rpc_resp = &res,
1994 };
1995 int status;
1996
cccef3b9 1997 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1998 if (status == 0) {
1999 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2000 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2001 server->caps |= NFS_CAP_ACLS;
2002 if (res.has_links != 0)
2003 server->caps |= NFS_CAP_HARDLINKS;
2004 if (res.has_symlinks != 0)
2005 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 2006 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2007 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2008 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 2009 server->acl_bitmask = res.acl_bitmask;
2010 }
cccef3b9 2011
1da177e4
LT		 2012 return status;
2013}
2014
55a97593 2015int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2016{
2017 struct nfs4_exception exception = { };
2018 int err;
2019 do {
2020 err = nfs4_handle_exception(server,
2021 _nfs4_server_capabilities(server, fhandle),
2022 &exception);
2023 } while (exception.retry);
2024 return err;
2025}
2026
2027static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2028 struct nfs_fsinfo *info)
2029{
1da177e4
LT		 2030 struct nfs4_lookup_root_arg args = {
2031 .bitmask = nfs4_fattr_bitmap,
2032 };
2033 struct nfs4_lookup_res res = {
2034 .server = server,
0e574af1 2035 .fattr = info->fattr,
1da177e4
LT		 2036 .fh = fhandle,
2037 };
2038 struct rpc_message msg = {
2039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2040 .rpc_argp = &args,
2041 .rpc_resp = &res,
2042 };
008f55d0 2043
0e574af1 2044 nfs_fattr_init(info->fattr);
fccba804 2045 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2046}
2047
2048static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2049 struct nfs_fsinfo *info)
2050{
2051 struct nfs4_exception exception = { };
2052 int err;
2053 do {
2054 err = nfs4_handle_exception(server,
2055 _nfs4_lookup_root(server, fhandle, info),
2056 &exception);
2057 } while (exception.retry);
2058 return err;
2059}
2060
54ceac45
DH		 2061/*
2062 * get the file handle for the "/" directory on the server
2063 */
1da177e4 2064static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2065 struct nfs_fsinfo *info)
1da177e4 2066{
1da177e4
LT		 2067 int status;
2068
1da177e4 2069 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2070 if (status == 0)
2071 status = nfs4_server_capabilities(server, fhandle);
2072 if (status == 0)
2073 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2074 return nfs4_map_errors(status);
1da177e4
LT		 2075}
2076
6b97fd3d
MN		 2077/*
2078 * Get locations and (maybe) other attributes of a referral.
2079 * Note that we'll actually follow the referral later when
2080 * we detect fsid mismatch in inode revalidation
2081 */
56659e99 2082static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2083{
2084 int status = -ENOMEM;
2085 struct page *page = NULL;
2086 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2087
2088 page = alloc_page(GFP_KERNEL);
2089 if (page == NULL)
2090 goto out;
2091 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2092 if (locations == NULL)
2093 goto out;
2094
c228fd3a 2095 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2096 if (status != 0)
2097 goto out;
2098 /* Make sure server returned a different fsid for the referral */
2099 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2100 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2101 status = -EIO;
2102 goto out;
2103 }
2104
2105 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2106 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2107 if (!fattr->mode)
2108 fattr->mode = S_IFDIR;
2109 memset(fhandle, 0, sizeof(struct nfs_fh));
2110out:
2111 if (page)
2112 __free_page(page);
2113 if (locations)
2114 kfree(locations);
2115 return status;
2116}
2117
1da177e4
LT		 2118static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2119{
2120 struct nfs4_getattr_arg args = {
2121 .fh = fhandle,
2122 .bitmask = server->attr_bitmask,
2123 };
2124 struct nfs4_getattr_res res = {
2125 .fattr = fattr,
2126 .server = server,
2127 };
2128 struct rpc_message msg = {
2129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2130 .rpc_argp = &args,
2131 .rpc_resp = &res,
2132 };
2133
0e574af1 2134 nfs_fattr_init(fattr);
cccef3b9 2135 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2136}
2137
2138static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2139{
2140 struct nfs4_exception exception = { };
2141 int err;
2142 do {
2143 err = nfs4_handle_exception(server,
2144 _nfs4_proc_getattr(server, fhandle, fattr),
2145 &exception);
2146 } while (exception.retry);
2147 return err;
2148}
2149
2150/*
2151 * The file is not closed if it is opened due to the a request to change
2152 * the size of the file. The open call will not be needed once the
2153 * VFS layer lookup-intents are implemented.
2154 *
2155 * Close is called when the inode is destroyed.
2156 * If we haven't opened the file for O_WRONLY, we
2157 * need to in the size_change case to obtain a stateid.
2158 *
2159 * Got race?
2160 * Because OPEN is always done by name in nfsv4, it is
2161 * possible that we opened a different file by the same
2162 * name. We can recognize this race condition, but we
2163 * can't do anything about it besides returning an error.
2164 *
2165 * This will be fixed with VFS changes (lookup-intent).
2166 */
2167static int
2168nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2169 struct iattr *sattr)
2170{
08e9eac4 2171 struct inode *inode = dentry->d_inode;
659bfcd6 2172 struct rpc_cred *cred = NULL;
d530838b 2173 struct nfs4_state *state = NULL;
1da177e4
LT		 2174 int status;
2175
0e574af1 2176 nfs_fattr_init(fattr);
1da177e4 2177
d530838b 2178 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2179 if (sattr->ia_valid & ATTR_FILE) {
2180 struct nfs_open_context *ctx;
2181
2182 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2183 if (ctx) {
2184 cred = ctx->cred;
2185 state = ctx->state;
2186 }
659bfcd6 2187 }
08e9eac4 2188
659bfcd6 2189 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2190 if (status == 0)
2191 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2192 return status;
2193}
2194
56659e99
TM		 2195static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2196 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2197 struct nfs_fattr *fattr)
2198{
2199 int status;
2200 struct nfs4_lookup_arg args = {
2201 .bitmask = server->attr_bitmask,
2202 .dir_fh = dirfh,
2203 .name = name,
2204 };
2205 struct nfs4_lookup_res res = {
2206 .server = server,
2207 .fattr = fattr,
2208 .fh = fhandle,
2209 };
2210 struct rpc_message msg = {
2211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2212 .rpc_argp = &args,
2213 .rpc_resp = &res,
2214 };
2215
2216 nfs_fattr_init(fattr);
2217
2218 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2219 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2220 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2221 return status;
2222}
2223
2224static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2225 struct qstr *name, struct nfs_fh *fhandle,
2226 struct nfs_fattr *fattr)
2227{
2228 struct nfs4_exception exception = { };
2229 int err;
2230 do {
4e56e082
TM		 2231 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2232 /* FIXME: !!!! */
2233 if (err == -NFS4ERR_MOVED) {
2234 err = -EREMOTE;
2235 break;
2236 }
2237 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2238 } while (exception.retry);
2239 return err;
2240}
2241
56659e99 2242static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2243 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2244{
4e56e082 2245 int status;
1da177e4
LT		 2246
2247 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2248 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2249 if (status == -NFS4ERR_MOVED)
2250 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2251 dprintk("NFS reply lookup: %d\n", status);
2252 return status;
2253}
2254
2255static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2256{
2257 struct nfs4_exception exception = { };
2258 int err;
2259 do {
2260 err = nfs4_handle_exception(NFS_SERVER(dir),
2261 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2262 &exception);
2263 } while (exception.retry);
2264 return err;
2265}
2266
2267static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2268{
76b32999
TM		 2269 struct nfs_server *server = NFS_SERVER(inode);
2270 struct nfs_fattr fattr;
1da177e4
LT		 2271 struct nfs4_accessargs args = {
2272 .fh = NFS_FH(inode),
76b32999
TM		 2273 .bitmask = server->attr_bitmask,
2274 };
2275 struct nfs4_accessres res = {
2276 .server = server,
2277 .fattr = &fattr,
1da177e4 2278 };
1da177e4
LT		 2279 struct rpc_message msg = {
2280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2281 .rpc_argp = &args,
2282 .rpc_resp = &res,
2283 .rpc_cred = entry->cred,
2284 };
2285 int mode = entry->mask;
2286 int status;
2287
2288 /*
2289 * Determine which access bits we want to ask for...
2290 */
2291 if (mode & MAY_READ)
2292 args.access |= NFS4_ACCESS_READ;
2293 if (S_ISDIR(inode->i_mode)) {
2294 if (mode & MAY_WRITE)
2295 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2296 if (mode & MAY_EXEC)
2297 args.access |= NFS4_ACCESS_LOOKUP;
2298 } else {
2299 if (mode & MAY_WRITE)
2300 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2301 if (mode & MAY_EXEC)
2302 args.access |= NFS4_ACCESS_EXECUTE;
2303 }
76b32999 2304 nfs_fattr_init(&fattr);
cccef3b9 2305 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2306 if (!status) {
2307 entry->mask = 0;
2308 if (res.access & NFS4_ACCESS_READ)
2309 entry->mask |= MAY_READ;
2310 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2311 entry->mask |= MAY_WRITE;
2312 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2313 entry->mask |= MAY_EXEC;
76b32999 2314 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2315 }
2316 return status;
2317}
2318
2319static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2320{
2321 struct nfs4_exception exception = { };
2322 int err;
2323 do {
2324 err = nfs4_handle_exception(NFS_SERVER(inode),
2325 _nfs4_proc_access(inode, entry),
2326 &exception);
2327 } while (exception.retry);
2328 return err;
2329}
2330
2331/*
2332 * TODO: For the time being, we don't try to get any attributes
2333 * along with any of the zero-copy operations READ, READDIR,
2334 * READLINK, WRITE.
2335 *
2336 * In the case of the first three, we want to put the GETATTR
2337 * after the read-type operation -- this is because it is hard
2338 * to predict the length of a GETATTR response in v4, and thus
2339 * align the READ data correctly. This means that the GETATTR
2340 * may end up partially falling into the page cache, and we should
2341 * shift it into the 'tail' of the xdr_buf before processing.
2342 * To do this efficiently, we need to know the total length
2343 * of data received, which doesn't seem to be available outside
2344 * of the RPC layer.
2345 *
2346 * In the case of WRITE, we also want to put the GETATTR after
2347 * the operation -- in this case because we want to make sure
2348 * we get the post-operation mtime and size. This means that
2349 * we can't use xdr_encode_pages() as written: we need a variant
2350 * of it which would leave room in the 'tail' iovec.
2351 *
2352 * Both of these changes to the XDR layer would in fact be quite
2353 * minor, but I decided to leave them for a subsequent patch.
2354 */
2355static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2356 unsigned int pgbase, unsigned int pglen)
2357{
2358 struct nfs4_readlink args = {
2359 .fh = NFS_FH(inode),
2360 .pgbase = pgbase,
2361 .pglen = pglen,
2362 .pages = &page,
2363 };
f50c7000 2364 struct nfs4_readlink_res res;
1da177e4
LT		 2365 struct rpc_message msg = {
2366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2367 .rpc_argp = &args,
f50c7000 2368 .rpc_resp = &res,
1da177e4
LT		 2369 };
2370
cccef3b9 2371 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2372}
2373
2374static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2375 unsigned int pgbase, unsigned int pglen)
2376{
2377 struct nfs4_exception exception = { };
2378 int err;
2379 do {
2380 err = nfs4_handle_exception(NFS_SERVER(inode),
2381 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2382 &exception);
2383 } while (exception.retry);
2384 return err;
2385}
2386
1da177e4
LT		 2387/*
2388 * Got race?
2389 * We will need to arrange for the VFS layer to provide an atomic open.
2390 * Until then, this create/open method is prone to inefficiency and race
2391 * conditions due to the lookup, create, and open VFS calls from sys_open()
2392 * placed on the wire.
2393 *
2394 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2395 * The file will be opened again in the subsequent VFS open call
2396 * (nfs4_proc_file_open).
2397 *
2398 * The open for read will just hang around to be used by any process that
2399 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2400 */
2401
2402static int
2403nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2404 int flags, struct nameidata *nd)
1da177e4 2405{
ad389da7 2406 struct path path = {
4ac91378 2407 .mnt = nd->path.mnt,
ad389da7
TM		 2408 .dentry = dentry,
2409 };
1da177e4
LT		 2410 struct nfs4_state *state;
2411 struct rpc_cred *cred;
dc0b027d 2412 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2413 int status = 0;
2414
98a8e323 2415 cred = rpc_lookup_cred();
1da177e4
LT		 2416 if (IS_ERR(cred)) {
2417 status = PTR_ERR(cred);
2418 goto out;
2419 }
dc0b027d 2420 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2421 d_drop(dentry);
1da177e4
LT		 2422 if (IS_ERR(state)) {
2423 status = PTR_ERR(state);
659bfcd6 2424 goto out_putcred;
1da177e4 2425 }
d4d9cdcb 2426 d_add(dentry, igrab(state->inode));
d75340cc 2427 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2428 if (flags & O_EXCL) {
2429 struct nfs_fattr fattr;
659bfcd6 2430 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2431 if (status == 0)
65e4308d 2432 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2433 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2434 }
ad389da7 2435 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2436 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2437 else
dc0b027d 2438 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2439out_putcred:
2440 put_rpccred(cred);
1da177e4
LT		 2441out:
2442 return status;
2443}
2444
2445static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2446{
16e42959 2447 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2448 struct nfs_removeargs args = {
1da177e4 2449 .fh = NFS_FH(dir),
4fdc17b2
TM		 2450 .name.len = name->len,
2451 .name.name = name->name,
16e42959
TM		 2452 .bitmask = server->attr_bitmask,
2453 };
4fdc17b2 2454 struct nfs_removeres res = {
16e42959 2455 .server = server,
1da177e4 2456 };
1da177e4 2457 struct rpc_message msg = {
4fdc17b2
TM		 2458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2459 .rpc_argp = &args,
2460 .rpc_resp = &res,
1da177e4
LT		 2461 };
2462 int status;
2463
4fdc17b2 2464 nfs_fattr_init(&res.dir_attr);
cccef3b9 2465 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2466 if (status == 0) {
2467 update_changeattr(dir, &res.cinfo);
4fdc17b2 2468 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2469 }
1da177e4
LT		 2470 return status;
2471}
2472
2473static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2474{
2475 struct nfs4_exception exception = { };
2476 int err;
2477 do {
2478 err = nfs4_handle_exception(NFS_SERVER(dir),
2479 _nfs4_proc_remove(dir, name),
2480 &exception);
2481 } while (exception.retry);
2482 return err;
2483}
2484
e4eff1a6 2485static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2486{
e4eff1a6
TM		 2487 struct nfs_server *server = NFS_SERVER(dir);
2488 struct nfs_removeargs *args = msg->rpc_argp;
2489 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2490
a65318bf 2491 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2492 res->server = server;
1da177e4 2493 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2494}
2495
e4eff1a6 2496static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2497{
e4eff1a6
TM		 2498 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2499
472cfbd9 2500 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2501 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2502 return 0;
472cfbd9 2503 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2504 update_changeattr(dir, &res->cinfo);
2505 nfs_post_op_update_inode(dir, &res->dir_attr);
2506 return 1;
1da177e4
LT		 2507}
2508
2509static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2510 struct inode *new_dir, struct qstr *new_name)
2511{
6caf2c82 2512 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2513 struct nfs4_rename_arg arg = {
2514 .old_dir = NFS_FH(old_dir),
2515 .new_dir = NFS_FH(new_dir),
2516 .old_name = old_name,
2517 .new_name = new_name,
6caf2c82
TM		 2518 .bitmask = server->attr_bitmask,
2519 };
2520 struct nfs_fattr old_fattr, new_fattr;
2521 struct nfs4_rename_res res = {
2522 .server = server,
2523 .old_fattr = &old_fattr,
2524 .new_fattr = &new_fattr,
1da177e4 2525 };
1da177e4
LT		 2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2528 .rpc_argp = &arg,
2529 .rpc_resp = &res,
2530 };
2531 int status;
2532
6caf2c82
TM		 2533 nfs_fattr_init(res.old_fattr);
2534 nfs_fattr_init(res.new_fattr);
cccef3b9 2535 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2536
2537 if (!status) {
2538 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2539 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2540 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2541 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2542 }
2543 return status;
2544}
2545
2546static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2547 struct inode *new_dir, struct qstr *new_name)
2548{
2549 struct nfs4_exception exception = { };
2550 int err;
2551 do {
2552 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2553 _nfs4_proc_rename(old_dir, old_name,
2554 new_dir, new_name),
2555 &exception);
2556 } while (exception.retry);
2557 return err;
2558}
2559
2560static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2561{
91ba2eee 2562 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2563 struct nfs4_link_arg arg = {
2564 .fh = NFS_FH(inode),
2565 .dir_fh = NFS_FH(dir),
2566 .name = name,
91ba2eee
TM		 2567 .bitmask = server->attr_bitmask,
2568 };
2569 struct nfs_fattr fattr, dir_attr;
2570 struct nfs4_link_res res = {
2571 .server = server,
2572 .fattr = &fattr,
2573 .dir_attr = &dir_attr,
1da177e4 2574 };
1da177e4
LT		 2575 struct rpc_message msg = {
2576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2577 .rpc_argp = &arg,
91ba2eee 2578 .rpc_resp = &res,
1da177e4
LT		 2579 };
2580 int status;
2581
91ba2eee
TM		 2582 nfs_fattr_init(res.fattr);
2583 nfs_fattr_init(res.dir_attr);
cccef3b9 2584 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2585 if (!status) {
2586 update_changeattr(dir, &res.cinfo);
2587 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2588 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2589 }
1da177e4
LT		 2590
2591 return status;
2592}
2593
2594static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2595{
2596 struct nfs4_exception exception = { };
2597 int err;
2598 do {
2599 err = nfs4_handle_exception(NFS_SERVER(inode),
2600 _nfs4_proc_link(inode, dir, name),
2601 &exception);
2602 } while (exception.retry);
2603 return err;
2604}
2605
57dc9a57
TM		 2606struct nfs4_createdata {
2607 struct rpc_message msg;
2608 struct nfs4_create_arg arg;
2609 struct nfs4_create_res res;
2610 struct nfs_fh fh;
2611 struct nfs_fattr fattr;
2612 struct nfs_fattr dir_fattr;
2613};
2614
2615static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2616 struct qstr *name, struct iattr *sattr, u32 ftype)
2617{
2618 struct nfs4_createdata *data;
2619
2620 data = kzalloc(sizeof(*data), GFP_KERNEL);
2621 if (data != NULL) {
2622 struct nfs_server *server = NFS_SERVER(dir);
2623
2624 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2625 data->msg.rpc_argp = &data->arg;
2626 data->msg.rpc_resp = &data->res;
2627 data->arg.dir_fh = NFS_FH(dir);
2628 data->arg.server = server;
2629 data->arg.name = name;
2630 data->arg.attrs = sattr;
2631 data->arg.ftype = ftype;
2632 data->arg.bitmask = server->attr_bitmask;
2633 data->res.server = server;
2634 data->res.fh = &data->fh;
2635 data->res.fattr = &data->fattr;
2636 data->res.dir_fattr = &data->dir_fattr;
2637 nfs_fattr_init(data->res.fattr);
2638 nfs_fattr_init(data->res.dir_fattr);
2639 }
2640 return data;
2641}
2642
2643static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2644{
cccef3b9
AA		 2645 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2646 &data->arg, &data->res, 1);
57dc9a57
TM		 2647 if (status == 0) {
2648 update_changeattr(dir, &data->res.dir_cinfo);
2649 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2650 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2651 }
2652 return status;
2653}
2654
2655static void nfs4_free_createdata(struct nfs4_createdata *data)
2656{
2657 kfree(data);
2658}
2659
4f390c15 2660static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2661 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2662{
57dc9a57
TM		 2663 struct nfs4_createdata *data;
2664 int status = -ENAMETOOLONG;
1da177e4 2665
94a6d753 2666 if (len > NFS4_MAXPATHLEN)
57dc9a57 2667 goto out;
4f390c15 2668
57dc9a57
TM		 2669 status = -ENOMEM;
2670 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2671 if (data == NULL)
2672 goto out;
2673
2674 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2675 data->arg.u.symlink.pages = &page;
2676 data->arg.u.symlink.len = len;
1da177e4 2677
57dc9a57
TM		 2678 status = nfs4_do_create(dir, dentry, data);
2679
2680 nfs4_free_createdata(data);
2681out:
1da177e4
LT		 2682 return status;
2683}
2684
4f390c15 2685static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2686 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2687{
2688 struct nfs4_exception exception = { };
2689 int err;
2690 do {
2691 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2692 _nfs4_proc_symlink(dir, dentry, page,
2693 len, sattr),
1da177e4
LT		 2694 &exception);
2695 } while (exception.retry);
2696 return err;
2697}
2698
2699static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2700 struct iattr *sattr)
2701{
57dc9a57
TM		 2702 struct nfs4_createdata *data;
2703 int status = -ENOMEM;
1da177e4 2704
57dc9a57
TM		 2705 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2706 if (data == NULL)
2707 goto out;
2708
2709 status = nfs4_do_create(dir, dentry, data);
2710
2711 nfs4_free_createdata(data);
2712out:
1da177e4
LT		 2713 return status;
2714}
2715
2716static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2717 struct iattr *sattr)
2718{
2719 struct nfs4_exception exception = { };
2720 int err;
2721 do {
2722 err = nfs4_handle_exception(NFS_SERVER(dir),
2723 _nfs4_proc_mkdir(dir, dentry, sattr),
2724 &exception);
2725 } while (exception.retry);
2726 return err;
2727}
2728
2729static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2730 u64 cookie, struct page *page, unsigned int count, int plus)
2731{
2732 struct inode *dir = dentry->d_inode;
2733 struct nfs4_readdir_arg args = {
2734 .fh = NFS_FH(dir),
2735 .pages = &page,
2736 .pgbase = 0,
2737 .count = count,
a65318bf 2738 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2739 };
2740 struct nfs4_readdir_res res;
2741 struct rpc_message msg = {
2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2743 .rpc_argp = &args,
2744 .rpc_resp = &res,
2745 .rpc_cred = cred,
2746 };
2747 int status;
2748
3110ff80 2749 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2750 dentry->d_parent->d_name.name,
2751 dentry->d_name.name,
2752 (unsigned long long)cookie);
1da177e4
LT		 2753 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2754 res.pgbase = args.pgbase;
cccef3b9 2755 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2756 if (status == 0)
2757 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2758
2759 nfs_invalidate_atime(dir);
2760
3110ff80 2761 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2762 return status;
2763}
2764
2765static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2766 u64 cookie, struct page *page, unsigned int count, int plus)
2767{
2768 struct nfs4_exception exception = { };
2769 int err;
2770 do {
2771 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2772 _nfs4_proc_readdir(dentry, cred, cookie,
2773 page, count, plus),
2774 &exception);
2775 } while (exception.retry);
2776 return err;
2777}
2778
2779static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2780 struct iattr *sattr, dev_t rdev)
2781{
57dc9a57
TM		 2782 struct nfs4_createdata *data;
2783 int mode = sattr->ia_mode;
2784 int status = -ENOMEM;
1da177e4
LT		 2785
2786 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2787 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2788
2789 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2790 if (data == NULL)
2791 goto out;
2792
1da177e4 2793 if (S_ISFIFO(mode))
57dc9a57 2794 data->arg.ftype = NF4FIFO;
1da177e4 2795 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2796 data->arg.ftype = NF4BLK;
2797 data->arg.u.device.specdata1 = MAJOR(rdev);
2798 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2799 }
2800 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2801 data->arg.ftype = NF4CHR;
2802 data->arg.u.device.specdata1 = MAJOR(rdev);
2803 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2804 }
1da177e4 2805
57dc9a57
TM		 2806 status = nfs4_do_create(dir, dentry, data);
2807
2808 nfs4_free_createdata(data);
2809out:
1da177e4
LT		 2810 return status;
2811}
2812
2813static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2814 struct iattr *sattr, dev_t rdev)
2815{
2816 struct nfs4_exception exception = { };
2817 int err;
2818 do {
2819 err = nfs4_handle_exception(NFS_SERVER(dir),
2820 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2821 &exception);
2822 } while (exception.retry);
2823 return err;
2824}
2825
2826static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2827 struct nfs_fsstat *fsstat)
2828{
2829 struct nfs4_statfs_arg args = {
2830 .fh = fhandle,
2831 .bitmask = server->attr_bitmask,
2832 };
24ad148a
BH		 2833 struct nfs4_statfs_res res = {
2834 .fsstat = fsstat,
2835 };
1da177e4
LT		 2836 struct rpc_message msg = {
2837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2838 .rpc_argp = &args,
24ad148a 2839 .rpc_resp = &res,
1da177e4
LT		 2840 };
2841
0e574af1 2842 nfs_fattr_init(fsstat->fattr);
cccef3b9 2843 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2844}
2845
2846static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(server,
2852 _nfs4_proc_statfs(server, fhandle, fsstat),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
2858static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2859 struct nfs_fsinfo *fsinfo)
2860{
2861 struct nfs4_fsinfo_arg args = {
2862 .fh = fhandle,
2863 .bitmask = server->attr_bitmask,
2864 };
3dda5e43
BH		 2865 struct nfs4_fsinfo_res res = {
2866 .fsinfo = fsinfo,
2867 };
1da177e4
LT		 2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2870 .rpc_argp = &args,
3dda5e43 2871 .rpc_resp = &res,
1da177e4
LT		 2872 };
2873
cccef3b9 2874 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2875}
2876
2877static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2878{
2879 struct nfs4_exception exception = { };
2880 int err;
2881
2882 do {
2883 err = nfs4_handle_exception(server,
2884 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2885 &exception);
2886 } while (exception.retry);
2887 return err;
2888}
2889
2890static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2891{
0e574af1 2892 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2893 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2894}
2895
2896static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2897 struct nfs_pathconf *pathconf)
2898{
2899 struct nfs4_pathconf_arg args = {
2900 .fh = fhandle,
2901 .bitmask = server->attr_bitmask,
2902 };
d45b2989
BH		 2903 struct nfs4_pathconf_res res = {
2904 .pathconf = pathconf,
2905 };
1da177e4
LT		 2906 struct rpc_message msg = {
2907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2908 .rpc_argp = &args,
d45b2989 2909 .rpc_resp = &res,
1da177e4
LT		 2910 };
2911
2912 /* None of the pathconf attributes are mandatory to implement */
2913 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2914 memset(pathconf, 0, sizeof(*pathconf));
2915 return 0;
2916 }
2917
0e574af1 2918 nfs_fattr_init(pathconf->fattr);
cccef3b9 2919 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2920}
2921
2922static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_pathconf *pathconf)
2924{
2925 struct nfs4_exception exception = { };
2926 int err;
2927
2928 do {
2929 err = nfs4_handle_exception(server,
2930 _nfs4_proc_pathconf(server, fhandle, pathconf),
2931 &exception);
2932 } while (exception.retry);
2933 return err;
2934}
2935
ec06c096 2936static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2937{
ec06c096 2938 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2939
f11c88af
AA		 2940 dprintk("--> %s\n", __func__);
2941
2942 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2943 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2944
9e33bed5 2945 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2946 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2947 return -EAGAIN;
1da177e4 2948 }
8850df99
TM		 2949
2950 nfs_invalidate_atime(data->inode);
1da177e4 2951 if (task->tk_status > 0)
ec06c096
TM		 2952 renew_lease(server, data->timestamp);
2953 return 0;
1da177e4
LT		 2954}
2955
bdc7f021 2956static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2957{
1da177e4 2958 data->timestamp = jiffies;
bdc7f021 2959 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2960}
2961
788e7a89 2962static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2963{
1da177e4
LT		 2964 struct inode *inode = data->inode;
2965
def6ed7e
AA		 2966 /* slot is freed in nfs_writeback_done */
2967 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2968 task->tk_status);
2969
9e33bed5 2970 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2971 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2972 return -EAGAIN;
1da177e4 2973 }
4f9838c7 2974 if (task->tk_status >= 0) {
1da177e4 2975 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2976 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2977 }
788e7a89 2978 return 0;
1da177e4
LT		 2979}
2980
bdc7f021 2981static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2982{
bdc7f021
TM		 2983 struct nfs_server *server = NFS_SERVER(data->inode);
2984
a65318bf 2985 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2986 data->res.server = server;
1da177e4
LT		 2987 data->timestamp = jiffies;
2988
bdc7f021 2989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2990}
2991
788e7a89 2992static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2993{
1da177e4
LT		 2994 struct inode *inode = data->inode;
2995
21d9a851
AA		 2996 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2997 task->tk_status);
9e33bed5 2998 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 2999 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 3000 return -EAGAIN;
1da177e4 3001 }
21d9a851
AA		 3002 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3003 &data->res.seq_res);
9e08a3c5 3004 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 3005 return 0;
1da177e4
LT		 3006}
3007
bdc7f021 3008static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3009{
788e7a89 3010 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 3011
a65318bf 3012 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 3013 data->res.server = server;
bdc7f021 3014 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 3015}
3016
3017/*
3018 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3019 * standalone procedure for queueing an asynchronous RENEW.
3020 */
963d8fe5 3021static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3022{
adfa6f98 3023 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3024 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3025
3026 if (task->tk_status < 0) {
95baa25c
TM		 3027 /* Unless we're shutting down, schedule state recovery! */
3028 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3029 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3030 return;
3031 }
3032 spin_lock(&clp->cl_lock);
3033 if (time_before(clp->cl_last_renewal,timestamp))
3034 clp->cl_last_renewal = timestamp;
3035 spin_unlock(&clp->cl_lock);
29fba38b
BH		 3036 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3037 task->tk_msg.rpc_cred);
3038 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT		 3039}
3040
963d8fe5
TM		 3041static const struct rpc_call_ops nfs4_renew_ops = {
3042 .rpc_call_done = nfs4_renew_done,
3043};
3044
adfa6f98 3045int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3046{
3047 struct rpc_message msg = {
3048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3049 .rpc_argp = clp,
b4454fe1 3050 .rpc_cred = cred,
1da177e4
LT		 3051 };
3052
3053 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3054 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3055}
3056
adfa6f98 3057int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3058{
3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3061 .rpc_argp = clp,
b4454fe1 3062 .rpc_cred = cred,
1da177e4
LT		 3063 };
3064 unsigned long now = jiffies;
3065 int status;
3066
3067 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3068 if (status < 0)
3069 return status;
3070 spin_lock(&clp->cl_lock);
3071 if (time_before(clp->cl_last_renewal,now))
3072 clp->cl_last_renewal = now;
3073 spin_unlock(&clp->cl_lock);
3074 return 0;
3075}
3076
aa1870af
BF		 3077static inline int nfs4_server_supports_acls(struct nfs_server *server)
3078{
3079 return (server->caps & NFS_CAP_ACLS)
3080 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3081 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3082}
3083
3084/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3085 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3086 * the stack.
3087 */
3088#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3089
3090static void buf_to_pages(const void *buf, size_t buflen,
3091 struct page **pages, unsigned int *pgbase)
3092{
3093 const void *p = buf;
3094
3095 *pgbase = offset_in_page(buf);
3096 p -= *pgbase;
3097 while (p < buf + buflen) {
3098 *(pages++) = virt_to_page(p);
3099 p += PAGE_CACHE_SIZE;
3100 }
3101}
3102
e50a1c2e
BF		 3103struct nfs4_cached_acl {
3104 int cached;
3105 size_t len;
3e9d4154 3106 char data[0];
e50a1c2e
BF		 3107};
3108
3109static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3110{
3111 struct nfs_inode *nfsi = NFS_I(inode);
3112
3113 spin_lock(&inode->i_lock);
3114 kfree(nfsi->nfs4_acl);
3115 nfsi->nfs4_acl = acl;
3116 spin_unlock(&inode->i_lock);
3117}
3118
3119static void nfs4_zap_acl_attr(struct inode *inode)
3120{
3121 nfs4_set_cached_acl(inode, NULL);
3122}
3123
3124static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3125{
3126 struct nfs_inode *nfsi = NFS_I(inode);
3127 struct nfs4_cached_acl *acl;
3128 int ret = -ENOENT;
3129
3130 spin_lock(&inode->i_lock);
3131 acl = nfsi->nfs4_acl;
3132 if (acl == NULL)
3133 goto out;
3134 if (buf == NULL) /* user is just asking for length */
3135 goto out_len;
3136 if (acl->cached == 0)
3137 goto out;
3138 ret = -ERANGE; /* see getxattr(2) man page */
3139 if (acl->len > buflen)
3140 goto out;
3141 memcpy(buf, acl->data, acl->len);
3142out_len:
3143 ret = acl->len;
3144out:
3145 spin_unlock(&inode->i_lock);
3146 return ret;
3147}
3148
3149static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3150{
3151 struct nfs4_cached_acl *acl;
3152
3153 if (buf && acl_len <= PAGE_SIZE) {
3154 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3155 if (acl == NULL)
3156 goto out;
3157 acl->cached = 1;
3158 memcpy(acl->data, buf, acl_len);
3159 } else {
3160 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3161 if (acl == NULL)
3162 goto out;
3163 acl->cached = 0;
3164 }
3165 acl->len = acl_len;
3166out:
3167 nfs4_set_cached_acl(inode, acl);
3168}
3169
16b4289c 3170static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3171{
aa1870af
BF		 3172 struct page *pages[NFS4ACL_MAXPAGES];
3173 struct nfs_getaclargs args = {
3174 .fh = NFS_FH(inode),
3175 .acl_pages = pages,
3176 .acl_len = buflen,
3177 };
663c79b3
BH		 3178 struct nfs_getaclres res = {
3179 .acl_len = buflen,
3180 };
e50a1c2e 3181 void *resp_buf;
aa1870af
BF		 3182 struct rpc_message msg = {
3183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3184 .rpc_argp = &args,
663c79b3 3185 .rpc_resp = &res,
aa1870af 3186 };
e50a1c2e 3187 struct page *localpage = NULL;
aa1870af
BF		 3188 int ret;
3189
e50a1c2e
BF		 3190 if (buflen < PAGE_SIZE) {
3191 /* As long as we're doing a round trip to the server anyway,
3192 * let's be prepared for a page of acl data. */
3193 localpage = alloc_page(GFP_KERNEL);
3194 resp_buf = page_address(localpage);
3195 if (localpage == NULL)
3196 return -ENOMEM;
3197 args.acl_pages[0] = localpage;
3198 args.acl_pgbase = 0;
663c79b3 3199 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3200 } else {
3201 resp_buf = buf;
3202 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3203 }
cccef3b9 3204 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3205 if (ret)
3206 goto out_free;
663c79b3
BH		 3207 if (res.acl_len > args.acl_len)
3208 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3209 else
663c79b3 3210 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3211 if (buf) {
3212 ret = -ERANGE;
663c79b3 3213 if (res.acl_len > buflen)
e50a1c2e
BF		 3214 goto out_free;
3215 if (localpage)
663c79b3 3216 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3217 }
663c79b3 3218 ret = res.acl_len;
e50a1c2e
BF		 3219out_free:
3220 if (localpage)
3221 __free_page(localpage);
aa1870af
BF		 3222 return ret;
3223}
3224
16b4289c
TM		 3225static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3226{
3227 struct nfs4_exception exception = { };
3228 ssize_t ret;
3229 do {
3230 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3231 if (ret >= 0)
3232 break;
3233 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3234 } while (exception.retry);
3235 return ret;
3236}
3237
e50a1c2e
BF		 3238static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3239{
3240 struct nfs_server *server = NFS_SERVER(inode);
3241 int ret;
3242
3243 if (!nfs4_server_supports_acls(server))
3244 return -EOPNOTSUPP;
3245 ret = nfs_revalidate_inode(server, inode);
3246 if (ret < 0)
3247 return ret;
3248 ret = nfs4_read_cached_acl(inode, buf, buflen);
3249 if (ret != -ENOENT)
3250 return ret;
3251 return nfs4_get_acl_uncached(inode, buf, buflen);
3252}
3253
16b4289c 3254static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3255{
3256 struct nfs_server *server = NFS_SERVER(inode);
3257 struct page *pages[NFS4ACL_MAXPAGES];
3258 struct nfs_setaclargs arg = {
3259 .fh = NFS_FH(inode),
3260 .acl_pages = pages,
3261 .acl_len = buflen,
3262 };
73c403a9 3263 struct nfs_setaclres res;
4b580ee3
BF		 3264 struct rpc_message msg = {
3265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3266 .rpc_argp = &arg,
73c403a9 3267 .rpc_resp = &res,
4b580ee3
BF		 3268 };
3269 int ret;
3270
3271 if (!nfs4_server_supports_acls(server))
3272 return -EOPNOTSUPP;
642ac549 3273 nfs_inode_return_delegation(inode);
4b580ee3 3274 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3275 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3276 nfs_access_zap_cache(inode);
3277 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3278 return ret;
3279}
3280
16b4289c
TM		 3281static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3282{
3283 struct nfs4_exception exception = { };
3284 int err;
3285 do {
3286 err = nfs4_handle_exception(NFS_SERVER(inode),
3287 __nfs4_proc_set_acl(inode, buf, buflen),
3288 &exception);
3289 } while (exception.retry);
3290 return err;
3291}
3292
1da177e4 3293static int
8328d59f 3294_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3295{
1da177e4
LT		 3296 if (!clp || task->tk_status >= 0)
3297 return 0;
3298 switch(task->tk_status) {
9e33bed5
TM		 3299 case -NFS4ERR_ADMIN_REVOKED:
3300 case -NFS4ERR_BAD_STATEID:
3301 case -NFS4ERR_OPENMODE:
3302 if (state == NULL)
3303 break;
3304 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3305 case -NFS4ERR_STALE_CLIENTID:
3306 case -NFS4ERR_STALE_STATEID:
3307 case -NFS4ERR_EXPIRED:
5d00837b 3308 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3309 nfs4_schedule_state_recovery(clp);
e005e804 3310 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3311 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3312 task->tk_status = 0;
3313 return -EAGAIN;
4745e315
AA		 3314#if defined(CONFIG_NFS_V4_1)
3315 case -NFS4ERR_BADSESSION:
3316 case -NFS4ERR_BADSLOT:
3317 case -NFS4ERR_BAD_HIGH_SLOT:
3318 case -NFS4ERR_DEADSESSION:
3319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3320 case -NFS4ERR_SEQ_FALSE_RETRY:
3321 case -NFS4ERR_SEQ_MISORDERED:
3322 dprintk("%s ERROR %d, Reset session\n", __func__,
3323 task->tk_status);
3324 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3325 task->tk_status = 0;
3326 return -EAGAIN;
3327#endif /* CONFIG_NFS_V4_1 */
1da177e4 3328 case -NFS4ERR_DELAY:
8328d59f
AA		 3329 if (server)
3330 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3331 case -NFS4ERR_GRACE:
1da177e4
LT		 3332 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3333 task->tk_status = 0;
3334 return -EAGAIN;
3335 case -NFS4ERR_OLD_STATEID:
3336 task->tk_status = 0;
3337 return -EAGAIN;
3338 }
3339 task->tk_status = nfs4_map_errors(task->tk_status);
3340 return 0;
3341}
3342
8328d59f
AA		 3343static int
3344nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3345{
3346 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3347}
3348
adfa6f98 3349int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3350{
3351 nfs4_verifier sc_verifier;
3352 struct nfs4_setclientid setclientid = {
3353 .sc_verifier = &sc_verifier,
3354 .sc_prog = program,
3355 };
3356 struct rpc_message msg = {
3357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3358 .rpc_argp = &setclientid,
3359 .rpc_resp = clp,
286d7d6a 3360 .rpc_cred = cred,
1da177e4 3361 };
bc4785cd 3362 __be32 *p;
1da177e4
LT		 3363 int loop = 0;
3364 int status;
3365
bc4785cd 3366 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3367 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3368 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3369
3370 for(;;) {
3371 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3372 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3373 clp->cl_ipaddr,
3374 rpc_peeraddr2str(clp->cl_rpcclient,
3375 RPC_DISPLAY_ADDR),
69dd716c
TM		 3376 rpc_peeraddr2str(clp->cl_rpcclient,
3377 RPC_DISPLAY_PROTO),
78ea323b 3378 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3379 clp->cl_id_uniquifier);
3380 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3381 sizeof(setclientid.sc_netid),
3382 rpc_peeraddr2str(clp->cl_rpcclient,
3383 RPC_DISPLAY_NETID));
1da177e4 3384 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3385 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3386 clp->cl_ipaddr, port >> 8, port & 255);
3387
3388 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3389 if (status != -NFS4ERR_CLID_INUSE)
3390 break;
3391 if (signalled())
3392 break;
3393 if (loop++ & 1)
3394 ssleep(clp->cl_lease_time + 1);
3395 else
3396 if (++clp->cl_id_uniquifier == 0)
3397 break;
3398 }
3399 return status;
3400}
3401
adfa6f98 3402static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3403{
3404 struct nfs_fsinfo fsinfo;
3405 struct rpc_message msg = {
3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3407 .rpc_argp = clp,
3408 .rpc_resp = &fsinfo,
286d7d6a 3409 .rpc_cred = cred,
1da177e4
LT		 3410 };
3411 unsigned long now;
3412 int status;
3413
3414 now = jiffies;
3415 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3416 if (status == 0) {
3417 spin_lock(&clp->cl_lock);
3418 clp->cl_lease_time = fsinfo.lease_time * HZ;
3419 clp->cl_last_renewal = now;
3420 spin_unlock(&clp->cl_lock);
3421 }
3422 return status;
3423}
3424
adfa6f98 3425int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3426{
77e03677 3427 long timeout = 0;
51581f3b
TM		 3428 int err;
3429 do {
3430 err = _nfs4_proc_setclientid_confirm(clp, cred);
3431 switch (err) {
3432 case 0:
3433 return err;
3434 case -NFS4ERR_RESOURCE:
3435 /* The IBM lawyers misread another document! */
3436 case -NFS4ERR_DELAY:
3437 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3438 }
3439 } while (err == 0);
3440 return err;
3441}
3442
fe650407
TM		 3443struct nfs4_delegreturndata {
3444 struct nfs4_delegreturnargs args;
fa178f29 3445 struct nfs4_delegreturnres res;
fe650407
TM		 3446 struct nfs_fh fh;
3447 nfs4_stateid stateid;
26e976a8 3448 unsigned long timestamp;
fa178f29 3449 struct nfs_fattr fattr;
fe650407
TM		 3450 int rpc_status;
3451};
3452
fe650407
TM		 3453static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3454{
3455 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3456
3457 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3458 task->tk_status);
3459
fe650407 3460 data->rpc_status = task->tk_status;
26e976a8 3461 if (data->rpc_status == 0)
fa178f29 3462 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3463}
3464
3465static void nfs4_delegreturn_release(void *calldata)
3466{
fe650407
TM		 3467 kfree(calldata);
3468}
3469
938e1010
AA		 3470#if defined(CONFIG_NFS_V4_1)
3471static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3472{
3473 struct nfs4_delegreturndata *d_data;
3474
3475 d_data = (struct nfs4_delegreturndata *)data;
3476
3477 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3478 &d_data->args.seq_args,
3479 &d_data->res.seq_res, 1, task))
3480 return;
3481 rpc_call_start(task);
3482}
3483#endif /* CONFIG_NFS_V4_1 */
3484
c8d149f3 3485static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3486#if defined(CONFIG_NFS_V4_1)
3487 .rpc_call_prepare = nfs4_delegreturn_prepare,
3488#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3489 .rpc_call_done = nfs4_delegreturn_done,
3490 .rpc_release = nfs4_delegreturn_release,
3491};
3492
e6f81075 3493static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3494{
3495 struct nfs4_delegreturndata *data;
fa178f29 3496 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3497 struct rpc_task *task;
5138fde0
TM		 3498 struct rpc_message msg = {
3499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3500 .rpc_cred = cred,
3501 };
c970aa85
TM		 3502 struct rpc_task_setup task_setup_data = {
3503 .rpc_client = server->client,
5138fde0 3504 .rpc_message = &msg,
c970aa85
TM		 3505 .callback_ops = &nfs4_delegreturn_ops,
3506 .flags = RPC_TASK_ASYNC,
3507 };
e6f81075 3508 int status = 0;
fe650407 3509
938e1010 3510 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3511 if (data == NULL)
3512 return -ENOMEM;
3513 data->args.fhandle = &data->fh;
3514 data->args.stateid = &data->stateid;
fa178f29 3515 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3516 nfs_copy_fh(&data->fh, NFS_FH(inode));
3517 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3518 data->res.fattr = &data->fattr;
3519 data->res.server = server;
5f7dbd5c 3520 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3521 nfs_fattr_init(data->res.fattr);
26e976a8 3522 data->timestamp = jiffies;
fe650407
TM		 3523 data->rpc_status = 0;
3524
c970aa85 3525 task_setup_data.callback_data = data;
5138fde0
TM		 3526 msg.rpc_argp = &data->args,
3527 msg.rpc_resp = &data->res,
c970aa85 3528 task = rpc_run_task(&task_setup_data);
7a1218a2 3529 if (IS_ERR(task))
fe650407 3530 return PTR_ERR(task);
e6f81075
TM		 3531 if (!issync)
3532 goto out;
fe650407 3533 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3534 if (status != 0)
3535 goto out;
3536 status = data->rpc_status;
3537 if (status != 0)
3538 goto out;
3539 nfs_refresh_inode(inode, &data->fattr);
3540out:
e6b3c4db 3541 rpc_put_task(task);
fe650407 3542 return status;
1da177e4
LT		 3543}
3544
e6f81075 3545int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3546{
3547 struct nfs_server *server = NFS_SERVER(inode);
3548 struct nfs4_exception exception = { };
3549 int err;
3550 do {
e6f81075 3551 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3552 switch (err) {
3553 case -NFS4ERR_STALE_STATEID:
3554 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3555 case 0:
3556 return 0;
3557 }
3558 err = nfs4_handle_exception(server, err, &exception);
3559 } while (exception.retry);
3560 return err;
3561}
3562
3563#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3564#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3565
3566/*
3567 * sleep, with exponential backoff, and retry the LOCK operation.
3568 */
3569static unsigned long
3570nfs4_set_lock_task_retry(unsigned long timeout)
3571{
150030b7 3572 schedule_timeout_killable(timeout);
1da177e4
LT		 3573 timeout <<= 1;
3574 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3575 return NFS4_LOCK_MAXTIMEOUT;
3576 return timeout;
3577}
3578
1da177e4
LT		 3579static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3580{
3581 struct inode *inode = state->inode;
3582 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3583 struct nfs_client *clp = server->nfs_client;
911d1aaf 3584 struct nfs_lockt_args arg = {
1da177e4 3585 .fh = NFS_FH(inode),
911d1aaf 3586 .fl = request,
1da177e4 3587 };
911d1aaf
TM		 3588 struct nfs_lockt_res res = {
3589 .denied = request,
1da177e4
LT		 3590 };
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3593 .rpc_argp = &arg,
3594 .rpc_resp = &res,
3595 .rpc_cred = state->owner->so_cred,
3596 };
1da177e4
LT		 3597 struct nfs4_lock_state *lsp;
3598 int status;
3599
911d1aaf 3600 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3601 status = nfs4_set_lock_state(state, request);
3602 if (status != 0)
3603 goto out;
3604 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3605 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3606 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3607 switch (status) {
3608 case 0:
3609 request->fl_type = F_UNLCK;
3610 break;
3611 case -NFS4ERR_DENIED:
3612 status = 0;
1da177e4 3613 }
70cc6487 3614 request->fl_ops->fl_release_private(request);
8d0a8a9d 3615out:
1da177e4
LT		 3616 return status;
3617}
3618
3619static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3620{
3621 struct nfs4_exception exception = { };
3622 int err;
3623
3624 do {
3625 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3626 _nfs4_proc_getlk(state, cmd, request),
3627 &exception);
3628 } while (exception.retry);
3629 return err;
3630}
3631
3632static int do_vfs_lock(struct file *file, struct file_lock *fl)
3633{
3634 int res = 0;
3635 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3636 case FL_POSIX:
3637 res = posix_lock_file_wait(file, fl);
3638 break;
3639 case FL_FLOCK:
3640 res = flock_lock_file_wait(file, fl);
3641 break;
3642 default:
3643 BUG();
3644 }
1da177e4
LT		 3645 return res;
3646}
3647
faf5f49c 3648struct nfs4_unlockdata {
911d1aaf
TM		 3649 struct nfs_locku_args arg;
3650 struct nfs_locku_res res;
faf5f49c
TM		 3651 struct nfs4_lock_state *lsp;
3652 struct nfs_open_context *ctx;
911d1aaf
TM		 3653 struct file_lock fl;
3654 const struct nfs_server *server;
26e976a8 3655 unsigned long timestamp;
faf5f49c
TM		 3656};
3657
911d1aaf
TM		 3658static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3659 struct nfs_open_context *ctx,
3660 struct nfs4_lock_state *lsp,
3661 struct nfs_seqid *seqid)
3662{
3663 struct nfs4_unlockdata *p;
3664 struct inode *inode = lsp->ls_state->inode;
3665
a893693c 3666 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3667 if (p == NULL)
3668 return NULL;
3669 p->arg.fh = NFS_FH(inode);
3670 p->arg.fl = &p->fl;
3671 p->arg.seqid = seqid;
c1d51931 3672 p->res.seqid = seqid;
5f7dbd5c 3673 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3674 p->arg.stateid = &lsp->ls_stateid;
3675 p->lsp = lsp;
3676 atomic_inc(&lsp->ls_count);
3677 /* Ensure we don't close file until we're done freeing locks! */
3678 p->ctx = get_nfs_open_context(ctx);
3679 memcpy(&p->fl, fl, sizeof(p->fl));
3680 p->server = NFS_SERVER(inode);
3681 return p;
3682}
3683
06f814a3 3684static void nfs4_locku_release_calldata(void *data)
faf5f49c 3685{
963d8fe5 3686 struct nfs4_unlockdata *calldata = data;
911d1aaf 3687 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3688 nfs4_put_lock_state(calldata->lsp);
3689 put_nfs_open_context(calldata->ctx);
3690 kfree(calldata);
faf5f49c
TM		 3691}
3692
963d8fe5 3693static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3694{
963d8fe5 3695 struct nfs4_unlockdata *calldata = data;
faf5f49c 3696
a893693c
AA		 3697 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3698 task->tk_status);
06f814a3
TM		 3699 if (RPC_ASSASSINATED(task))
3700 return;
faf5f49c
TM		 3701 switch (task->tk_status) {
3702 case 0:
3703 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3704 calldata->res.stateid.data,
faf5f49c 3705 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3706 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3707 break;
9e33bed5
TM		 3708 case -NFS4ERR_BAD_STATEID:
3709 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3710 case -NFS4ERR_STALE_STATEID:
3711 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3712 break;
3713 default:
9e33bed5 3714 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3715 nfs4_restart_rpc(task,
3716 calldata->server->nfs_client);
faf5f49c 3717 }
a893693c
AA		 3718 nfs4_sequence_free_slot(calldata->server->nfs_client,
3719 &calldata->res.seq_res);
faf5f49c
TM		 3720}
3721
4ce70ada 3722static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3723{
4ce70ada 3724 struct nfs4_unlockdata *calldata = data;
faf5f49c 3725
911d1aaf 3726 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3727 return;
3728 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3729 /* Note: exit _without_ running nfs4_locku_done */
3730 task->tk_action = NULL;
faf5f49c
TM		 3731 return;
3732 }
26e976a8 3733 calldata->timestamp = jiffies;
a893693c
AA		 3734 if (nfs4_setup_sequence(calldata->server->nfs_client,
3735 &calldata->arg.seq_args,
3736 &calldata->res.seq_res, 1, task))
3737 return;
5138fde0 3738 rpc_call_start(task);
faf5f49c
TM		 3739}
3740
963d8fe5 3741static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3742 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3743 .rpc_call_done = nfs4_locku_done,
06f814a3 3744 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3745};
3746
a5d16a4d
TM		 3747static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3748 struct nfs_open_context *ctx,
3749 struct nfs4_lock_state *lsp,
3750 struct nfs_seqid *seqid)
3751{
3752 struct nfs4_unlockdata *data;
5138fde0
TM		 3753 struct rpc_message msg = {
3754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3755 .rpc_cred = ctx->cred,
3756 };
c970aa85
TM		 3757 struct rpc_task_setup task_setup_data = {
3758 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3759 .rpc_message = &msg,
c970aa85 3760 .callback_ops = &nfs4_locku_ops,
101070ca 3761 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3762 .flags = RPC_TASK_ASYNC,
3763 };
a5d16a4d 3764
137d6aca
FF		 3765 /* Ensure this is an unlock - when canceling a lock, the
3766 * canceled lock is passed in, and it won't be an unlock.
3767 */
3768 fl->fl_type = F_UNLCK;
3769
a5d16a4d
TM		 3770 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3771 if (data == NULL) {
3772 nfs_free_seqid(seqid);
3773 return ERR_PTR(-ENOMEM);
3774 }
3775
5138fde0
TM		 3776 msg.rpc_argp = &data->arg,
3777 msg.rpc_resp = &data->res,
c970aa85
TM		 3778 task_setup_data.callback_data = data;
3779 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3780}
3781
faf5f49c
TM		 3782static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3783{
19e03c57 3784 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3785 struct nfs_seqid *seqid;
1da177e4 3786 struct nfs4_lock_state *lsp;
06f814a3
TM		 3787 struct rpc_task *task;
3788 int status = 0;
536ff0f8 3789 unsigned char fl_flags = request->fl_flags;
faf5f49c 3790
8d0a8a9d 3791 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3792 /* Unlock _before_ we do the RPC call */
3793 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3794 down_read(&nfsi->rwsem);
3795 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3796 up_read(&nfsi->rwsem);
9b073574 3797 goto out;
19e03c57
TM		 3798 }
3799 up_read(&nfsi->rwsem);
8d0a8a9d 3800 if (status != 0)
9b073574
TM		 3801 goto out;
3802 /* Is this a delegated lock? */
3803 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3804 goto out;
8d0a8a9d 3805 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3806 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3807 status = -ENOMEM;
911d1aaf 3808 if (seqid == NULL)
9b073574 3809 goto out;
cd3758e3 3810 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3811 status = PTR_ERR(task);
3812 if (IS_ERR(task))
9b073574 3813 goto out;
a5d16a4d 3814 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3815 rpc_put_task(task);
9b073574 3816out:
536ff0f8 3817 request->fl_flags = fl_flags;
1da177e4
LT		 3818 return status;
3819}
3820
a5d16a4d
TM		 3821struct nfs4_lockdata {
3822 struct nfs_lock_args arg;
3823 struct nfs_lock_res res;
3824 struct nfs4_lock_state *lsp;
3825 struct nfs_open_context *ctx;
3826 struct file_lock fl;
26e976a8 3827 unsigned long timestamp;
a5d16a4d
TM		 3828 int rpc_status;
3829 int cancelled;
66179efe 3830 struct nfs_server *server;
a5d16a4d
TM		 3831};
3832
3833static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3834 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3835{
a5d16a4d
TM		 3836 struct nfs4_lockdata *p;
3837 struct inode *inode = lsp->ls_state->inode;
1da177e4 3838 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3839
3840 p = kzalloc(sizeof(*p), GFP_KERNEL);
3841 if (p == NULL)
3842 return NULL;
3843
3844 p->arg.fh = NFS_FH(inode);
3845 p->arg.fl = &p->fl;
2f74c0a0
TM		 3846 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3847 if (p->arg.open_seqid == NULL)
3848 goto out_free;
a5d16a4d
TM		 3849 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3850 if (p->arg.lock_seqid == NULL)
2f74c0a0 3851 goto out_free_seqid;
a5d16a4d 3852 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3853 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3854 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3855 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3856 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3857 p->lsp = lsp;
66179efe 3858 p->server = server;
a5d16a4d
TM		 3859 atomic_inc(&lsp->ls_count);
3860 p->ctx = get_nfs_open_context(ctx);
3861 memcpy(&p->fl, fl, sizeof(p->fl));
3862 return p;
2f74c0a0
TM		 3863out_free_seqid:
3864 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3865out_free:
3866 kfree(p);
3867 return NULL;
3868}
3869
3870static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3871{
3872 struct nfs4_lockdata *data = calldata;
3873 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3874
3110ff80 3875 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3876 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3877 return;
a5d16a4d
TM		 3878 /* Do we need to do an open_to_lock_owner? */
3879 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3880 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3881 return;
a5d16a4d
TM		 3882 data->arg.open_stateid = &state->stateid;
3883 data->arg.new_lock_owner = 1;
c1d51931 3884 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3885 } else
3886 data->arg.new_lock_owner = 0;
26e976a8 3887 data->timestamp = jiffies;
66179efe
AA		 3888 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3889 &data->res.seq_res, 1, task))
3890 return;
5138fde0 3891 rpc_call_start(task);
3110ff80 3892 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3893}
3894
3895static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3896{
3897 struct nfs4_lockdata *data = calldata;
3898
3110ff80 3899 dprintk("%s: begin!\n", __func__);
a5d16a4d 3900
66179efe
AA		 3901 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3902 task->tk_status);
3903
a5d16a4d
TM		 3904 data->rpc_status = task->tk_status;
3905 if (RPC_ASSASSINATED(task))
3906 goto out;
3907 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3908 if (data->rpc_status == 0)
3909 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3910 else
3911 goto out;
3912 }
3913 if (data->rpc_status == 0) {
3914 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3915 sizeof(data->lsp->ls_stateid.data));
3916 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3917 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3918 }
a5d16a4d 3919out:
3110ff80 3920 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3921}
3922
3923static void nfs4_lock_release(void *calldata)
3924{
3925 struct nfs4_lockdata *data = calldata;
3926
3110ff80 3927 dprintk("%s: begin!\n", __func__);
2f74c0a0 3928 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3929 if (data->cancelled != 0) {
3930 struct rpc_task *task;
3931 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3932 data->arg.lock_seqid);
3933 if (!IS_ERR(task))
e6b3c4db 3934 rpc_put_task(task);
3110ff80 3935 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3936 } else
3937 nfs_free_seqid(data->arg.lock_seqid);
3938 nfs4_put_lock_state(data->lsp);
3939 put_nfs_open_context(data->ctx);
3940 kfree(data);
3110ff80 3941 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3942}
3943
3944static const struct rpc_call_ops nfs4_lock_ops = {
3945 .rpc_call_prepare = nfs4_lock_prepare,
3946 .rpc_call_done = nfs4_lock_done,
3947 .rpc_release = nfs4_lock_release,
3948};
3949
3950static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3951{
3952 struct nfs4_lockdata *data;
3953 struct rpc_task *task;
5138fde0
TM		 3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3956 .rpc_cred = state->owner->so_cred,
3957 };
c970aa85
TM		 3958 struct rpc_task_setup task_setup_data = {
3959 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3960 .rpc_message = &msg,
c970aa85 3961 .callback_ops = &nfs4_lock_ops,
101070ca 3962 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3963 .flags = RPC_TASK_ASYNC,
3964 };
a5d16a4d
TM		 3965 int ret;
3966
3110ff80 3967 dprintk("%s: begin!\n", __func__);
cd3758e3 3968 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3969 fl->fl_u.nfs4_fl.owner);
3970 if (data == NULL)
3971 return -ENOMEM;
3972 if (IS_SETLKW(cmd))
3973 data->arg.block = 1;
3974 if (reclaim != 0)
3975 data->arg.reclaim = 1;
5138fde0
TM		 3976 msg.rpc_argp = &data->arg,
3977 msg.rpc_resp = &data->res,
c970aa85
TM		 3978 task_setup_data.callback_data = data;
3979 task = rpc_run_task(&task_setup_data);
7a1218a2 3980 if (IS_ERR(task))
a5d16a4d 3981 return PTR_ERR(task);
a5d16a4d
TM		 3982 ret = nfs4_wait_for_completion_rpc_task(task);
3983 if (ret == 0) {
3984 ret = data->rpc_status;
a5d16a4d
TM		 3985 } else
3986 data->cancelled = 1;
e6b3c4db 3987 rpc_put_task(task);
3110ff80 3988 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3989 return ret;
1da177e4
LT		 3990}
3991
3992static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3993{
202b50dc
TM		 3994 struct nfs_server *server = NFS_SERVER(state->inode);
3995 struct nfs4_exception exception = { };
3996 int err;
3997
3998 do {
42a2d13e
TM		 3999 /* Cache the lock if possible... */
4000 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4001 return 0;
202b50dc
TM		 4002 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4003 if (err != -NFS4ERR_DELAY)
4004 break;
4005 nfs4_handle_exception(server, err, &exception);
4006 } while (exception.retry);
4007 return err;
1da177e4
LT		 4008}
4009
4010static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4011{
202b50dc
TM		 4012 struct nfs_server *server = NFS_SERVER(state->inode);
4013 struct nfs4_exception exception = { };
4014 int err;
4015
6bfc93ef
TM		 4016 err = nfs4_set_lock_state(state, request);
4017 if (err != 0)
4018 return err;
202b50dc 4019 do {
42a2d13e
TM		 4020 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4021 return 0;
202b50dc
TM		 4022 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4023 if (err != -NFS4ERR_DELAY)
4024 break;
4025 nfs4_handle_exception(server, err, &exception);
4026 } while (exception.retry);
4027 return err;
1da177e4
LT		 4028}
4029
4030static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4031{
19e03c57 4032 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4033 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4034 int status;
4035
6bfc93ef 4036 /* Is this a delegated open? */
6bfc93ef
TM		 4037 status = nfs4_set_lock_state(state, request);
4038 if (status != 0)
4039 goto out;
01c3b861
TM		 4040 request->fl_flags |= FL_ACCESS;
4041 status = do_vfs_lock(request->fl_file, request);
4042 if (status < 0)
4043 goto out;
19e03c57 4044 down_read(&nfsi->rwsem);
01c3b861 4045 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4046 /* Yes: cache locks! */
01c3b861 4047 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4048 request->fl_flags = fl_flags & ~FL_SLEEP;
4049 status = do_vfs_lock(request->fl_file, request);
4050 goto out_unlock;
01c3b861 4051 }
6bfc93ef
TM		 4052 status = _nfs4_do_setlk(state, cmd, request, 0);
4053 if (status != 0)
01c3b861 4054 goto out_unlock;
6bfc93ef 4055 /* Note: we always want to sleep here! */
01c3b861 4056 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4057 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4058 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4059out_unlock:
19e03c57 4060 up_read(&nfsi->rwsem);
01c3b861
TM		 4061out:
4062 request->fl_flags = fl_flags;
1da177e4
LT		 4063 return status;
4064}
4065
4066static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4067{
4068 struct nfs4_exception exception = { };
4069 int err;
4070
4071 do {
965b5d67
TM		 4072 err = _nfs4_proc_setlk(state, cmd, request);
4073 if (err == -NFS4ERR_DENIED)
4074 err = -EAGAIN;
1da177e4 4075 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4076 err, &exception);
1da177e4
LT		 4077 } while (exception.retry);
4078 return err;
4079}
4080
4081static int
4082nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4083{
4084 struct nfs_open_context *ctx;
4085 struct nfs4_state *state;
4086 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4087 int status;
4088
4089 /* verify open state */
cd3758e3 4090 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4091 state = ctx->state;
4092
4093 if (request->fl_start < 0 || request->fl_end < 0)
4094 return -EINVAL;
4095
4096 if (IS_GETLK(cmd))
4097 return nfs4_proc_getlk(state, F_GETLK, request);
4098
4099 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4100 return -EINVAL;
4101
4102 if (request->fl_type == F_UNLCK)
4103 return nfs4_proc_unlck(state, cmd, request);
4104
4105 do {
4106 status = nfs4_proc_setlk(state, cmd, request);
4107 if ((status != -EAGAIN) || IS_SETLK(cmd))
4108 break;
4109 timeout = nfs4_set_lock_task_retry(timeout);
4110 status = -ERESTARTSYS;
4111 if (signalled())
4112 break;
4113 } while(status < 0);
1da177e4
LT		 4114 return status;
4115}
4116
888e694c
TM		 4117int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4118{
4119 struct nfs_server *server = NFS_SERVER(state->inode);
4120 struct nfs4_exception exception = { };
4121 int err;
4122
4123 err = nfs4_set_lock_state(state, fl);
4124 if (err != 0)
4125 goto out;
4126 do {
4127 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
d5122201
TM		 4128 switch (err) {
4129 default:
4130 printk(KERN_ERR "%s: unhandled error %d.\n",
4131 __func__, err);
4132 case 0:
965b5d67 4133 case -ESTALE:
d5122201
TM		 4134 goto out;
4135 case -NFS4ERR_EXPIRED:
4136 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4137 case -NFS4ERR_STALE_STATEID:
d5122201
TM		 4138 nfs4_schedule_state_recovery(server->nfs_client);
4139 goto out;
965b5d67
TM		 4140 case -ERESTARTSYS:
4141 /*
4142 * The show must go on: exit, but mark the
4143 * stateid as needing recovery.
4144 */
4145 case -NFS4ERR_ADMIN_REVOKED:
4146 case -NFS4ERR_BAD_STATEID:
4147 case -NFS4ERR_OPENMODE:
4148 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4149 err = 0;
4150 goto out;
4151 case -ENOMEM:
4152 case -NFS4ERR_DENIED:
4153 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4154 err = 0;
4155 goto out;
d5122201
TM		 4156 case -NFS4ERR_DELAY:
4157 break;
4158 }
888e694c
TM		 4159 err = nfs4_handle_exception(server, err, &exception);
4160 } while (exception.retry);
4161out:
4162 return err;
4163}
6b3b5496 4164
aa1870af
BF		 4165#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4166
6b3b5496
BF		 4167int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4168 size_t buflen, int flags)
4169{
4b580ee3
BF		 4170 struct inode *inode = dentry->d_inode;
4171
4172 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4173 return -EOPNOTSUPP;
4174
4b580ee3 4175 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4176}
4177
4178/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4179 * and that's what we'll do for e.g. user attributes that haven't been set.
4180 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4181 * attributes in kernel-managed attribute namespaces. */
4182ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4183 size_t buflen)
4184{
aa1870af
BF		 4185 struct inode *inode = dentry->d_inode;
4186
4187 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4188 return -EOPNOTSUPP;
4189
4190 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4191}
4192
4193ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4194{
aa1870af 4195 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4196
096455a2
BF		 4197 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4198 return 0;
6b3b5496
BF		 4199 if (buf && buflen < len)
4200 return -ERANGE;
4201 if (buf)
aa1870af
BF		 4202 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4203 return len;
6b3b5496
BF		 4204}
4205
69aaaae1
TM		 4206static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4207{
4208 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4209 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4210 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4211 return;
4212
4213 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4214 NFS_ATTR_FATTR_NLINK;
4215 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4216 fattr->nlink = 2;
4217}
4218
56659e99 4219int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4220 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4221{
4222 struct nfs_server *server = NFS_SERVER(dir);
4223 u32 bitmask[2] = {
361e624f
MN		 4224 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4225 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4226 };
4227 struct nfs4_fs_locations_arg args = {
4228 .dir_fh = NFS_FH(dir),
c228fd3a 4229 .name = name,
683b57b4
TM		 4230 .page = page,
4231 .bitmask = bitmask,
4232 };
22958463
BH		 4233 struct nfs4_fs_locations_res res = {
4234 .fs_locations = fs_locations,
4235 };
683b57b4
TM		 4236 struct rpc_message msg = {
4237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4238 .rpc_argp = &args,
22958463 4239 .rpc_resp = &res,
683b57b4
TM		 4240 };
4241 int status;
4242
3110ff80 4243 dprintk("%s: start\n", __func__);
c228fd3a 4244 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4245 fs_locations->server = server;
830b8e33 4246 fs_locations->nlocations = 0;
cccef3b9 4247 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4248 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4249 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4250 return status;
4251}
4252
557134a3 4253#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4254/*
4255 * nfs4_proc_exchange_id()
4256 *
4257 * Since the clientid has expired, all compounds using sessions
4258 * associated with the stale clientid will be returning
4259 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4260 * be in some phase of session reset.
4261 */
4262static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4263{
4264 nfs4_verifier verifier;
4265 struct nfs41_exchange_id_args args = {
4266 .client = clp,
4267 .flags = clp->cl_exchange_flags,
4268 };
4269 struct nfs41_exchange_id_res res = {
4270 .client = clp,
4271 };
4272 int status;
4273 struct rpc_message msg = {
4274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4275 .rpc_argp = &args,
4276 .rpc_resp = &res,
4277 .rpc_cred = cred,
4278 };
4279 __be32 *p;
4280
4281 dprintk("--> %s\n", __func__);
4282 BUG_ON(clp == NULL);
a7b72103 4283
99fe60d0
BH		 4284 p = (u32 *)verifier.data;
4285 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4286 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4287 args.verifier = &verifier;
4288
4289 while (1) {
4290 args.id_len = scnprintf(args.id, sizeof(args.id),
4291 "%s/%s %u",
4292 clp->cl_ipaddr,
4293 rpc_peeraddr2str(clp->cl_rpcclient,
4294 RPC_DISPLAY_ADDR),
4295 clp->cl_id_uniquifier);
4296
4297 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4298
4299 if (status != NFS4ERR_CLID_INUSE)
4300 break;
4301
4302 if (signalled())
4303 break;
4304
4305 if (++clp->cl_id_uniquifier == 0)
4306 break;
4307 }
4308
4309 dprintk("<-- %s status= %d\n", __func__, status);
4310 return status;
4311}
4312
2050f0cc
AA		 4313struct nfs4_get_lease_time_data {
4314 struct nfs4_get_lease_time_args *args;
4315 struct nfs4_get_lease_time_res *res;
4316 struct nfs_client *clp;
4317};
4318
4319static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4320 void *calldata)
4321{
4322 int ret;
4323 struct nfs4_get_lease_time_data *data =
4324 (struct nfs4_get_lease_time_data *)calldata;
4325
4326 dprintk("--> %s\n", __func__);
4327 /* just setup sequence, do not trigger session recovery
4328 since we're invoked within one */
4329 ret = nfs41_setup_sequence(data->clp->cl_session,
4330 &data->args->la_seq_args,
4331 &data->res->lr_seq_res, 0, task);
4332
4333 BUG_ON(ret == -EAGAIN);
4334 rpc_call_start(task);
4335 dprintk("<-- %s\n", __func__);
4336}
4337
4338/*
4339 * Called from nfs4_state_manager thread for session setup, so don't recover
4340 * from sequence operation or clientid errors.
4341 */
4342static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4343{
4344 struct nfs4_get_lease_time_data *data =
4345 (struct nfs4_get_lease_time_data *)calldata;
4346
4347 dprintk("--> %s\n", __func__);
4348 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4349 switch (task->tk_status) {
4350 case -NFS4ERR_DELAY:
4351 case -NFS4ERR_GRACE:
4352 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4353 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4354 task->tk_status = 0;
eedc020e 4355 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4356 return;
4357 }
4358 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4359 dprintk("<-- %s\n", __func__);
4360}
4361
4362struct rpc_call_ops nfs4_get_lease_time_ops = {
4363 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4364 .rpc_call_done = nfs4_get_lease_time_done,
4365};
4366
4367int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4368{
4369 struct rpc_task *task;
4370 struct nfs4_get_lease_time_args args;
4371 struct nfs4_get_lease_time_res res = {
4372 .lr_fsinfo = fsinfo,
4373 };
4374 struct nfs4_get_lease_time_data data = {
4375 .args = &args,
4376 .res = &res,
4377 .clp = clp,
4378 };
4379 struct rpc_message msg = {
4380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4381 .rpc_argp = &args,
4382 .rpc_resp = &res,
4383 };
4384 struct rpc_task_setup task_setup = {
4385 .rpc_client = clp->cl_rpcclient,
4386 .rpc_message = &msg,
4387 .callback_ops = &nfs4_get_lease_time_ops,
4388 .callback_data = &data
4389 };
4390 int status;
4391
4392 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4393 dprintk("--> %s\n", __func__);
4394 task = rpc_run_task(&task_setup);
4395
4396 if (IS_ERR(task))
4397 status = PTR_ERR(task);
4398 else {
4399 status = task->tk_status;
4400 rpc_put_task(task);
4401 }
4402 dprintk("<-- %s return %d\n", __func__, status);
4403
4404 return status;
4405}
4406
b73dafa7
RL		 4407/*
4408 * Reset a slot table
4409 */
4410static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4411 int old_max_slots, int ivalue)
ac72b7b3 4412{
b73dafa7 4413 int i;
ac72b7b3
AA		 4414 int ret = 0;
4415
b73dafa7 4416 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
ac72b7b3 4417
b73dafa7
RL		 4418 /*
4419 * Until we have dynamic slot table adjustment, insist
4420 * upon the same slot table size
4421 */
ac72b7b3
AA		 4422 if (max_slots != old_max_slots) {
4423 dprintk("%s reset slot table does't match old\n",
4424 __func__);
4425 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4426 goto out;
4427 }
4428 spin_lock(&tbl->slot_tbl_lock);
4429 for (i = 0; i < max_slots; ++i)
b73dafa7 4430 tbl->slots[i].seq_nr = ivalue;
ac72b7b3
AA		 4431 tbl->highest_used_slotid = -1;
4432 spin_unlock(&tbl->slot_tbl_lock);
4433 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4434 tbl, tbl->slots, tbl->max_slots);
4435out:
4436 dprintk("<-- %s: return %d\n", __func__, ret);
4437 return ret;
4438}
4439
b73dafa7
RL		 4440/*
4441 * Reset the forechannel and backchannel slot tables
4442 */
4443static int nfs4_reset_slot_tables(struct nfs4_session *session)
4444{
4445 int status;
4446
4447 status = nfs4_reset_slot_table(&session->fc_slot_table,
4448 session->fc_attrs.max_reqs,
4449 session->fc_slot_table.max_slots,
4450 1);
f8625a6a
RL		 4451 if (status)
4452 return status;
4453
4454 status = nfs4_reset_slot_table(&session->bc_slot_table,
4455 session->bc_attrs.max_reqs,
4456 session->bc_slot_table.max_slots,
4457 0);
b73dafa7
RL		 4458 return status;
4459}
4460
f8625a6a
RL		 4461/* Destroy the slot table */
4462static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4463{
4464 if (session->fc_slot_table.slots != NULL) {
4465 kfree(session->fc_slot_table.slots);
4466 session->fc_slot_table.slots = NULL;
4467 }
4468 if (session->bc_slot_table.slots != NULL) {
4469 kfree(session->bc_slot_table.slots);
4470 session->bc_slot_table.slots = NULL;
4471 }
4472 return;
4473}
4474
fc931582
AA		 4475/*
4476 * Initialize slot table
4477 */
050047ce
RL		 4478static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4479 int max_slots, int ivalue)
fc931582 4480{
050047ce 4481 int i;
fc931582
AA		 4482 struct nfs4_slot *slot;
4483 int ret = -ENOMEM;
4484
4485 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4486
050047ce 4487 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
fc931582
AA		 4488
4489 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4490 if (!slot)
4491 goto out;
4492 for (i = 0; i < max_slots; ++i)
050047ce 4493 slot[i].seq_nr = ivalue;
fc931582
AA		 4494 ret = 0;
4495
4496 spin_lock(&tbl->slot_tbl_lock);
4497 if (tbl->slots != NULL) {
4498 spin_unlock(&tbl->slot_tbl_lock);
4499 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4500 __func__, tbl, tbl->slots);
4501 WARN_ON(1);
4502 goto out_free;
4503 }
4504 tbl->max_slots = max_slots;
4505 tbl->slots = slot;
4506 tbl->highest_used_slotid = -1; /* no slot is currently used */
4507 spin_unlock(&tbl->slot_tbl_lock);
4508 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4509 tbl, tbl->slots, tbl->max_slots);
4510out:
4511 dprintk("<-- %s: return %d\n", __func__, ret);
4512 return ret;
050047ce 4513
fc931582
AA		 4514out_free:
4515 kfree(slot);
4516 goto out;
4517}
4518
050047ce
RL		 4519/*
4520 * Initialize the forechannel and backchannel tables
4521 */
4522static int nfs4_init_slot_tables(struct nfs4_session *session)
4523{
4524 int status;
4525
4526 status = nfs4_init_slot_table(&session->fc_slot_table,
4527 session->fc_attrs.max_reqs, 1);
f8625a6a
RL		 4528 if (status)
4529 return status;
050047ce 4530
f8625a6a
RL		 4531 status = nfs4_init_slot_table(&session->bc_slot_table,
4532 session->bc_attrs.max_reqs, 0);
4533 if (status)
4534 nfs4_destroy_slot_tables(session);
4535
4536 return status;
557134a3
AA		 4537}
4538
4539struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4540{
4541 struct nfs4_session *session;
4542 struct nfs4_slot_table *tbl;
4543
4544 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4545 if (!session)
4546 return NULL;
76db6d95
AA		 4547
4548 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4549 /*
4550 * The create session reply races with the server back
4551 * channel probe. Mark the client NFS_CS_SESSION_INITING
4552 * so that the client back channel can find the
4553 * nfs_client struct
4554 */
4555 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4556
557134a3
AA		 4557 tbl = &session->fc_slot_table;
4558 spin_lock_init(&tbl->slot_tbl_lock);
f8625a6a
RL		 4559 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4560
4561 tbl = &session->bc_slot_table;
4562 spin_lock_init(&tbl->slot_tbl_lock);
4563 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4564
557134a3
AA		 4565 session->clp = clp;
4566 return session;
4567}
4568
4569void nfs4_destroy_session(struct nfs4_session *session)
4570{
5a0ffe54
AA		 4571 nfs4_proc_destroy_session(session);
4572 dprintk("%s Destroy backchannel for xprt %p\n",
4573 __func__, session->clp->cl_rpcclient->cl_xprt);
4574 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4575 NFS41_BC_MIN_CALLBACKS);
f8625a6a 4576 nfs4_destroy_slot_tables(session);
557134a3
AA		 4577 kfree(session);
4578}
4579
fc931582
AA		 4580/*
4581 * Initialize the values to be used by the client in CREATE_SESSION
4582 * If nfs4_init_session set the fore channel request and response sizes,
4583 * use them.
4584 *
4585 * Set the back channel max_resp_sz_cached to zero to force the client to
4586 * always set csa_cachethis to FALSE because the current implementation
4587 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4588 */
4589static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4590{
4591 struct nfs4_session *session = args->client->cl_session;
4592 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4593 mxresp_sz = session->fc_attrs.max_resp_sz;
4594
4595 if (mxrqst_sz == 0)
4596 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4597 if (mxresp_sz == 0)
4598 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4599 /* Fore channel attributes */
4600 args->fc_attrs.headerpadsz = 0;
4601 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4602 args->fc_attrs.max_resp_sz = mxresp_sz;
4603 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4604 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4605 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4606
4607 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4608 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4609 __func__,
4610 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4611 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4612 args->fc_attrs.max_reqs);
4613
4614 /* Back channel attributes */
4615 args->bc_attrs.headerpadsz = 0;
4616 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4617 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4618 args->bc_attrs.max_resp_sz_cached = 0;
4619 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4620 args->bc_attrs.max_reqs = 1;
4621
4622 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4623 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4624 __func__,
4625 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4626 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4627 args->bc_attrs.max_reqs);
4628}
4629
8d35301d
AA		 4630static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4631{
4632 if (rcvd <= sent)
4633 return 0;
4634 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4635 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4636 return -EINVAL;
4637}
4638
4639#define _verify_fore_channel_attr(_name_) \
4640 _verify_channel_attr("fore", #_name_, \
4641 args->fc_attrs._name_, \
4642 session->fc_attrs._name_)
4643
4644#define _verify_back_channel_attr(_name_) \
4645 _verify_channel_attr("back", #_name_, \
4646 args->bc_attrs._name_, \
4647 session->bc_attrs._name_)
4648
4649/*
4650 * The server is not allowed to increase the fore channel header pad size,
4651 * maximum response size, or maximum number of operations.
4652 *
4653 * The back channel attributes are only negotiatied down: We send what the
4654 * (back channel) server insists upon.
4655 */
4656static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4657 struct nfs4_session *session)
4658{
4659 int ret = 0;
4660
4661 ret |= _verify_fore_channel_attr(headerpadsz);
4662 ret |= _verify_fore_channel_attr(max_resp_sz);
4663 ret |= _verify_fore_channel_attr(max_ops);
4664
4665 ret |= _verify_back_channel_attr(headerpadsz);
4666 ret |= _verify_back_channel_attr(max_rqst_sz);
4667 ret |= _verify_back_channel_attr(max_resp_sz);
4668 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4669 ret |= _verify_back_channel_attr(max_ops);
4670 ret |= _verify_back_channel_attr(max_reqs);
4671
4672 return ret;
4673}
4674
fc931582
AA		 4675static int _nfs4_proc_create_session(struct nfs_client *clp)
4676{
4677 struct nfs4_session *session = clp->cl_session;
4678 struct nfs41_create_session_args args = {
4679 .client = clp,
4680 .cb_program = NFS4_CALLBACK,
4681 };
4682 struct nfs41_create_session_res res = {
4683 .client = clp,
4684 };
4685 struct rpc_message msg = {
4686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4687 .rpc_argp = &args,
4688 .rpc_resp = &res,
4689 };
4690 int status;
4691
4692 nfs4_init_channel_attrs(&args);
0f91421e 4693 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582
AA		 4694
4695 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4696
8d35301d
AA		 4697 if (!status)
4698 /* Verify the session's negotiated channel_attrs values */
4699 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4700 if (!status) {
4701 /* Increment the clientid slot sequence id */
4702 clp->cl_seqid++;
4703 }
4704
4705 return status;
4706}
4707
4708/*
4709 * Issues a CREATE_SESSION operation to the server.
4710 * It is the responsibility of the caller to verify the session is
4711 * expired before calling this routine.
4712 */
ac72b7b3 4713int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4714{
4715 int status;
4716 unsigned *ptr;
4717 struct nfs_fsinfo fsinfo;
4718 struct nfs4_session *session = clp->cl_session;
4719
4720 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4721
4722 status = _nfs4_proc_create_session(clp);
4723 if (status)
4724 goto out;
4725
ac72b7b3
AA		 4726 /* Init or reset the fore channel */
4727 if (reset)
b73dafa7 4728 status = nfs4_reset_slot_tables(session);
ac72b7b3 4729 else
050047ce 4730 status = nfs4_init_slot_tables(session);
fc931582
AA		 4731 dprintk("fore channel slot table initialization returned %d\n", status);
4732 if (status)
4733 goto out;
4734
4735 ptr = (unsigned *)&session->sess_id.data[0];
4736 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4737 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4738
ac72b7b3
AA		 4739 if (reset)
4740 /* Lease time is aleady set */
4741 goto out;
4742
fc931582
AA		 4743 /* Get the lease time */
4744 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4745 if (status == 0) {
4746 /* Update lease time and schedule renewal */
4747 spin_lock(&clp->cl_lock);
4748 clp->cl_lease_time = fsinfo.lease_time * HZ;
4749 clp->cl_last_renewal = jiffies;
4750 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4751 spin_unlock(&clp->cl_lock);
4752
4753 nfs4_schedule_state_renewal(clp);
4754 }
4755out:
4756 dprintk("<-- %s\n", __func__);
4757 return status;
4758}
4759
0f3e66c6
AA		 4760/*
4761 * Issue the over-the-wire RPC DESTROY_SESSION.
4762 * The caller must serialize access to this routine.
4763 */
4764int nfs4_proc_destroy_session(struct nfs4_session *session)
4765{
4766 int status = 0;
4767 struct rpc_message msg;
4768
4769 dprintk("--> nfs4_proc_destroy_session\n");
4770
4771 /* session is still being setup */
4772 if (session->clp->cl_cons_state != NFS_CS_READY)
4773 return status;
4774
4775 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4776 msg.rpc_argp = session;
4777 msg.rpc_resp = NULL;
4778 msg.rpc_cred = NULL;
4779 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4780
4781 if (status)
4782 printk(KERN_WARNING
4783 "Got error %d from the server on DESTROY_SESSION. "
4784 "Session has been destroyed regardless...\n", status);
4785
4786 dprintk("<-- nfs4_proc_destroy_session\n");
4787 return status;
4788}
4789
fccba804
TM		 4790int nfs4_init_session(struct nfs_server *server)
4791{
4792 struct nfs_client *clp = server->nfs_client;
4793 int ret;
4794
4795 if (!nfs4_has_session(clp))
4796 return 0;
4797
4798 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4799 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4800 ret = nfs4_recover_expired_lease(server);
4801 if (!ret)
4802 ret = nfs4_check_client_ready(clp);
4803 return ret;
4804}
4805
fc01cea9
AA		 4806/*
4807 * Renew the cl_session lease.
4808 */
4809static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4810{
4811 struct nfs4_sequence_args args;
4812 struct nfs4_sequence_res res;
4813
4814 struct rpc_message msg = {
4815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4816 .rpc_argp = &args,
4817 .rpc_resp = &res,
4818 .rpc_cred = cred,
4819 };
4820
4821 args.sa_cache_this = 0;
4822
4823 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4824 &res, 0);
4825}
4826
4827void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4828{
4829 struct nfs_client *clp = (struct nfs_client *)data;
4830
4831 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4832
4833 if (task->tk_status < 0) {
4834 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4835
4836 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4837 == -EAGAIN) {
eedc020e 4838 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4839 return;
4840 }
4841 }
4842 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4843 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4844
4845 put_rpccred(task->tk_msg.rpc_cred);
4846 kfree(task->tk_msg.rpc_argp);
4847 kfree(task->tk_msg.rpc_resp);
4848
4849 dprintk("<-- %s\n", __func__);
4850}
4851
4852static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4853{
4854 struct nfs_client *clp;
4855 struct nfs4_sequence_args *args;
4856 struct nfs4_sequence_res *res;
4857
4858 clp = (struct nfs_client *)data;
4859 args = task->tk_msg.rpc_argp;
4860 res = task->tk_msg.rpc_resp;
4861
4862 if (nfs4_setup_sequence(clp, args, res, 0, task))
4863 return;
4864 rpc_call_start(task);
4865}
4866
4867static const struct rpc_call_ops nfs41_sequence_ops = {
4868 .rpc_call_done = nfs41_sequence_call_done,
4869 .rpc_call_prepare = nfs41_sequence_prepare,
4870};
4871
4872static int nfs41_proc_async_sequence(struct nfs_client *clp,
4873 struct rpc_cred *cred)
4874{
4875 struct nfs4_sequence_args *args;
4876 struct nfs4_sequence_res *res;
4877 struct rpc_message msg = {
4878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4879 .rpc_cred = cred,
4880 };
4881
4882 args = kzalloc(sizeof(*args), GFP_KERNEL);
4883 if (!args)
4884 return -ENOMEM;
4885 res = kzalloc(sizeof(*res), GFP_KERNEL);
4886 if (!res) {
4887 kfree(args);
4888 return -ENOMEM;
4889 }
4890 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4891 msg.rpc_argp = args;
4892 msg.rpc_resp = res;
4893
4894 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4895 &nfs41_sequence_ops, (void *)clp);
4896}
4897
557134a3
AA		 4898#endif /* CONFIG_NFS_V4_1 */
4899
591d71cb 4900struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4901 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4902 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4903 .recover_open = nfs4_open_reclaim,
4904 .recover_lock = nfs4_lock_reclaim,
591d71cb 4905 .establish_clid = nfs4_init_clientid,
90a16617 4906 .get_clid_cred = nfs4_get_setclientid_cred,
1da177e4
LT		 4907};
4908
591d71cb
AA		 4909#if defined(CONFIG_NFS_V4_1)
4910struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4911 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4912 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4913 .recover_open = nfs4_open_reclaim,
4914 .recover_lock = nfs4_lock_reclaim,
4915 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4916 .get_clid_cred = nfs4_get_exchange_id_cred,
591d71cb
AA		 4917};
4918#endif /* CONFIG_NFS_V4_1 */
4919
4920struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4921 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4922 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4923 .recover_open = nfs4_open_expired,
4924 .recover_lock = nfs4_lock_expired,
4925 .establish_clid = nfs4_init_clientid,
90a16617 4926 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 4927};
4928
4929#if defined(CONFIG_NFS_V4_1)
4930struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4931 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4932 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4933 .recover_open = nfs4_open_expired,
4934 .recover_lock = nfs4_lock_expired,
591d71cb 4935 .establish_clid = nfs4_proc_exchange_id,
b4b82607 4936 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 4937};
591d71cb 4938#endif /* CONFIG_NFS_V4_1 */
1da177e4 4939
29fba38b
BH		 4940struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4941 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4942 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4943 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4944};
4945
4946#if defined(CONFIG_NFS_V4_1)
4947struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4948 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4949 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4950 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4951};
4952#endif
4953
4954/*
4955 * Per minor version reboot and network partition recovery ops
4956 */
4957
591d71cb
AA		 4958struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4959 &nfs40_reboot_recovery_ops,
4960#if defined(CONFIG_NFS_V4_1)
4961 &nfs41_reboot_recovery_ops,
4962#endif
4963};
4964
4965struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4966 &nfs40_nograce_recovery_ops,
4967#if defined(CONFIG_NFS_V4_1)
4968 &nfs41_nograce_recovery_ops,
4969#endif
4970};
4971
29fba38b
BH		 4972struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4973 &nfs40_state_renewal_ops,
4974#if defined(CONFIG_NFS_V4_1)
4975 &nfs41_state_renewal_ops,
4976#endif
4977};
4978
92e1d5be 4979static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4980 .permission = nfs_permission,
4981 .getattr = nfs_getattr,
4982 .setattr = nfs_setattr,
4983 .getxattr = nfs4_getxattr,
4984 .setxattr = nfs4_setxattr,
4985 .listxattr = nfs4_listxattr,
4986};
4987
509de811 4988const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4989 .version = 4, /* protocol version */
4990 .dentry_ops = &nfs4_dentry_operations,
4991 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4992 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4993 .getroot = nfs4_proc_get_root,
4994 .getattr = nfs4_proc_getattr,
4995 .setattr = nfs4_proc_setattr,
2b3de441 4996 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4997 .lookup = nfs4_proc_lookup,
4998 .access = nfs4_proc_access,
4999 .readlink = nfs4_proc_readlink,
1da177e4
LT		 5000 .create = nfs4_proc_create,
5001 .remove = nfs4_proc_remove,
5002 .unlink_setup = nfs4_proc_unlink_setup,
5003 .unlink_done = nfs4_proc_unlink_done,
5004 .rename = nfs4_proc_rename,
5005 .link = nfs4_proc_link,
5006 .symlink = nfs4_proc_symlink,
5007 .mkdir = nfs4_proc_mkdir,
5008 .rmdir = nfs4_proc_remove,
5009 .readdir = nfs4_proc_readdir,
5010 .mknod = nfs4_proc_mknod,
5011 .statfs = nfs4_proc_statfs,
5012 .fsinfo = nfs4_proc_fsinfo,
5013 .pathconf = nfs4_proc_pathconf,
e9326dca 5014 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 5015 .decode_dirent = nfs4_decode_dirent,
5016 .read_setup = nfs4_proc_read_setup,
ec06c096 5017 .read_done = nfs4_read_done,
1da177e4 5018 .write_setup = nfs4_proc_write_setup,
788e7a89 5019 .write_done = nfs4_write_done,
1da177e4 5020 .commit_setup = nfs4_proc_commit_setup,
788e7a89 5021 .commit_done = nfs4_commit_done,
1da177e4 5022 .lock = nfs4_proc_lock,
e50a1c2e 5023 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 5024 .close_context = nfs4_close_context,
1da177e4
LT		 5025};
5026
5027/*
5028 * Local variables:
5029 * c-basic-offset: 8
5030 * End:
5031 */
Linux 6.x block layer and io_uring tree(s)