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nfs41: Handle session errors during delegation return
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
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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/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
42#include <linux/sunrpc/clnt.h>
43#include <linux/nfs.h>
44#include <linux/nfs4.h>
45#include <linux/nfs_fs.h>
46#include <linux/nfs_page.h>
47#include <linux/namei.h>
48#include <linux/mount.h>
49#include <linux/module.h>
50#include <linux/sunrpc/bc_xprt.h>
51
52#include "nfs4_fs.h"
53#include "delegation.h"
54#include "internal.h"
55#include "iostat.h"
56#include "callback.h"
57
58#define NFSDBG_FACILITY NFSDBG_PROC
59
60#define NFS4_POLL_RETRY_MIN (HZ/10)
61#define NFS4_POLL_RETRY_MAX (15*HZ)
62
63#define NFS4_MAX_LOOP_ON_RECOVER (10)
64
65struct nfs4_opendata;
66static int _nfs4_proc_open(struct nfs4_opendata *data);
67static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
68static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
69static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71
72/* Prevent leaks of NFSv4 errors into userland */
73static int nfs4_map_errors(int err)
74{
75 if (err >= -1000)
76 return err;
77 switch (err) {
78 case -NFS4ERR_RESOURCE:
79 return -EREMOTEIO;
80 default:
81 dprintk("%s could not handle NFSv4 error %d\n",
82 __func__, -err);
83 break;
84 }
85 return -EIO;
86}
87
88/*
89 * This is our standard bitmap for GETATTR requests.
90 */
91const u32 nfs4_fattr_bitmap[2] = {
92 FATTR4_WORD0_TYPE
93 | FATTR4_WORD0_CHANGE
94 | FATTR4_WORD0_SIZE
95 | FATTR4_WORD0_FSID
96 | FATTR4_WORD0_FILEID,
97 FATTR4_WORD1_MODE
98 | FATTR4_WORD1_NUMLINKS
99 | FATTR4_WORD1_OWNER
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
106};
107
108const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
115};
116
117const u32 nfs4_pathconf_bitmap[2] = {
118 FATTR4_WORD0_MAXLINK
119 | FATTR4_WORD0_MAXNAME,
120 0
121};
122
123const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
127 0
128};
129
130const u32 nfs4_fs_locations_bitmap[2] = {
131 FATTR4_WORD0_TYPE
132 | FATTR4_WORD0_CHANGE
133 | FATTR4_WORD0_SIZE
134 | FATTR4_WORD0_FSID
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
137 FATTR4_WORD1_MODE
138 | FATTR4_WORD1_NUMLINKS
139 | FATTR4_WORD1_OWNER
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
147};
148
149static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
150 struct nfs4_readdir_arg *readdir)
151{
152 __be32 *start, *p;
153
154 BUG_ON(readdir->count < 80);
155 if (cookie > 2) {
156 readdir->cookie = cookie;
157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
158 return;
159 }
160
161 readdir->cookie = 0;
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
163 if (cookie == 2)
164 return;
165
166 /*
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
171 * instead of 1 or 2.
172 */
173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
174
175 if (cookie == 0) {
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
181 p++;
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
186 }
187
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
193 p++;
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
198
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
202}
203
204static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205{
206 int res;
207
208 might_sleep();
209
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs_wait_bit_killable, TASK_KILLABLE);
212 return res;
213}
214
215static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216{
217 int res = 0;
218
219 might_sleep();
220
221 if (*timeout <= 0)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
227 res = -ERESTARTSYS;
228 *timeout <<= 1;
229 return res;
230}
231
232/* This is the error handling routine for processes that are allowed
233 * to sleep.
234 */
235static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
236{
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
239 int ret = errorcode;
240
241 exception->retry = 0;
242 switch(errorcode) {
243 case 0:
244 return 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
248 if (state == NULL)
249 break;
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
256 if (ret == 0)
257 exception->retry = 1;
258#if !defined(CONFIG_NFS_V4_1)
259 break;
260#else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
262 break;
263 /* FALLTHROUGH */
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
272 errorcode);
273 nfs4_schedule_state_recovery(clp);
274 exception->retry = 1;
275 break;
276#endif /* !defined(CONFIG_NFS_V4_1) */
277 case -NFS4ERR_FILE_OPEN:
278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
280 * fail
281 */
282 ret = -EBUSY;
283 break;
284 }
285 case -NFS4ERR_GRACE:
286 case -NFS4ERR_DELAY:
287 ret = nfs4_delay(server->client, &exception->timeout);
288 if (ret != 0)
289 break;
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
292 }
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
295}
296
297
298static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
299{
300 struct nfs_client *clp = server->nfs_client;
301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
305}
306
307#if defined(CONFIG_NFS_V4_1)
308
309/*
310 * nfs4_free_slot - free a slot and efficiently update slot table.
311 *
312 * freeing a slot is trivially done by clearing its respective bit
313 * in the bitmap.
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
321 *
322 * Must be called while holding tbl->slot_tbl_lock
323 */
324static void
325nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
326{
327 int slotid = free_slotid;
328
329 /* clear used bit in bitmap */
330 __clear_bit(slotid, tbl->used_slots);
331
332 /* update highest_used_slotid when it is freed */
333 if (slotid == tbl->highest_used_slotid) {
334 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
335 if (slotid < tbl->max_slots)
336 tbl->highest_used_slotid = slotid;
337 else
338 tbl->highest_used_slotid = -1;
339 }
340 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
341 free_slotid, tbl->highest_used_slotid);
342}
343
344static void nfs41_sequence_free_slot(const struct nfs_client *clp,
345 struct nfs4_sequence_res *res)
346{
347 struct nfs4_slot_table *tbl;
348
349 tbl = &clp->cl_session->fc_slot_table;
350 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
351 /* just wake up the next guy waiting since
352 * we may have not consumed a slot after all */
353 dprintk("%s: No slot\n", __func__);
354 return;
355 }
356
357 spin_lock(&tbl->slot_tbl_lock);
358 nfs4_free_slot(tbl, res->sr_slotid);
359
360 /* Signal state manager thread if session is drained */
361 if (test_bit(NFS4CLNT_SESSION_DRAINING, &clp->cl_state)) {
362 if (tbl->highest_used_slotid == -1) {
363 dprintk("%s COMPLETE: Session Drained\n", __func__);
364 complete(&clp->cl_session->complete);
365 }
366 } else
367 rpc_wake_up_next(&tbl->slot_tbl_waitq);
368 spin_unlock(&tbl->slot_tbl_lock);
369 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
370}
371
372static void nfs41_sequence_done(struct nfs_client *clp,
373 struct nfs4_sequence_res *res,
374 int rpc_status)
375{
376 unsigned long timestamp;
377 struct nfs4_slot_table *tbl;
378 struct nfs4_slot *slot;
379
380 /*
381 * sr_status remains 1 if an RPC level error occurred. The server
382 * may or may not have processed the sequence operation..
383 * Proceed as if the server received and processed the sequence
384 * operation.
385 */
386 if (res->sr_status == 1)
387 res->sr_status = NFS_OK;
388
389 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
390 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
391 goto out;
392
393 /* Check the SEQUENCE operation status */
394 if (res->sr_status == 0) {
395 tbl = &clp->cl_session->fc_slot_table;
396 slot = tbl->slots + res->sr_slotid;
397 /* Update the slot's sequence and clientid lease timer */
398 ++slot->seq_nr;
399 timestamp = res->sr_renewal_time;
400 spin_lock(&clp->cl_lock);
401 if (time_before(clp->cl_last_renewal, timestamp))
402 clp->cl_last_renewal = timestamp;
403 spin_unlock(&clp->cl_lock);
404 /* Check sequence flags */
405 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
406 }
407out:
408 /* The session may be reset by one of the error handlers. */
409 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
410 nfs41_sequence_free_slot(clp, res);
411}
412
413/*
414 * nfs4_find_slot - efficiently look for a free slot
415 *
416 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
417 * If found, we mark the slot as used, update the highest_used_slotid,
418 * and respectively set up the sequence operation args.
419 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
420 *
421 * Note: must be called with under the slot_tbl_lock.
422 */
423static u8
424nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
425{
426 int slotid;
427 u8 ret_id = NFS4_MAX_SLOT_TABLE;
428 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
429
430 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
431 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
432 tbl->max_slots);
433 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
434 if (slotid >= tbl->max_slots)
435 goto out;
436 __set_bit(slotid, tbl->used_slots);
437 if (slotid > tbl->highest_used_slotid)
438 tbl->highest_used_slotid = slotid;
439 ret_id = slotid;
440out:
441 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
442 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
443 return ret_id;
444}
445
446static int nfs41_setup_sequence(struct nfs4_session *session,
447 struct nfs4_sequence_args *args,
448 struct nfs4_sequence_res *res,
449 int cache_reply,
450 struct rpc_task *task)
451{
452 struct nfs4_slot *slot;
453 struct nfs4_slot_table *tbl;
454 u8 slotid;
455
456 dprintk("--> %s\n", __func__);
457 /* slot already allocated? */
458 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
459 return 0;
460
461 memset(res, 0, sizeof(*res));
462 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
463 tbl = &session->fc_slot_table;
464
465 spin_lock(&tbl->slot_tbl_lock);
466 if (test_bit(NFS4CLNT_SESSION_DRAINING, &session->clp->cl_state)) {
467 /*
468 * The state manager will wait until the slot table is empty.
469 * Schedule the reset thread
470 */
471 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
472 spin_unlock(&tbl->slot_tbl_lock);
473 dprintk("%s Schedule Session Reset\n", __func__);
474 return -EAGAIN;
475 }
476
477 slotid = nfs4_find_slot(tbl, task);
478 if (slotid == NFS4_MAX_SLOT_TABLE) {
479 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
480 spin_unlock(&tbl->slot_tbl_lock);
481 dprintk("<-- %s: no free slots\n", __func__);
482 return -EAGAIN;
483 }
484 spin_unlock(&tbl->slot_tbl_lock);
485
486 slot = tbl->slots + slotid;
487 args->sa_session = session;
488 args->sa_slotid = slotid;
489 args->sa_cache_this = cache_reply;
490
491 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
492
493 res->sr_session = session;
494 res->sr_slotid = slotid;
495 res->sr_renewal_time = jiffies;
496 /*
497 * sr_status is only set in decode_sequence, and so will remain
498 * set to 1 if an rpc level failure occurs.
499 */
500 res->sr_status = 1;
501 return 0;
502}
503
504int nfs4_setup_sequence(struct nfs_client *clp,
505 struct nfs4_sequence_args *args,
506 struct nfs4_sequence_res *res,
507 int cache_reply,
508 struct rpc_task *task)
509{
510 int ret = 0;
511
512 dprintk("--> %s clp %p session %p sr_slotid %d\n",
513 __func__, clp, clp->cl_session, res->sr_slotid);
514
515 if (!nfs4_has_session(clp))
516 goto out;
517 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
518 task);
519 if (ret && ret != -EAGAIN) {
520 /* terminate rpc task */
521 task->tk_status = ret;
522 task->tk_action = NULL;
523 }
524out:
525 dprintk("<-- %s status=%d\n", __func__, ret);
526 return ret;
527}
528
529struct nfs41_call_sync_data {
530 struct nfs_client *clp;
531 struct nfs4_sequence_args *seq_args;
532 struct nfs4_sequence_res *seq_res;
533 int cache_reply;
534};
535
536static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
537{
538 struct nfs41_call_sync_data *data = calldata;
539
540 dprintk("--> %s data->clp->cl_session %p\n", __func__,
541 data->clp->cl_session);
542 if (nfs4_setup_sequence(data->clp, data->seq_args,
543 data->seq_res, data->cache_reply, task))
544 return;
545 rpc_call_start(task);
546}
547
548static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
549{
550 struct nfs41_call_sync_data *data = calldata;
551
552 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
553}
554
555struct rpc_call_ops nfs41_call_sync_ops = {
556 .rpc_call_prepare = nfs41_call_sync_prepare,
557 .rpc_call_done = nfs41_call_sync_done,
558};
559
560static int nfs4_call_sync_sequence(struct nfs_client *clp,
561 struct rpc_clnt *clnt,
562 struct rpc_message *msg,
563 struct nfs4_sequence_args *args,
564 struct nfs4_sequence_res *res,
565 int cache_reply)
566{
567 int ret;
568 struct rpc_task *task;
569 struct nfs41_call_sync_data data = {
570 .clp = clp,
571 .seq_args = args,
572 .seq_res = res,
573 .cache_reply = cache_reply,
574 };
575 struct rpc_task_setup task_setup = {
576 .rpc_client = clnt,
577 .rpc_message = msg,
578 .callback_ops = &nfs41_call_sync_ops,
579 .callback_data = &data
580 };
581
582 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
583 task = rpc_run_task(&task_setup);
584 if (IS_ERR(task))
585 ret = PTR_ERR(task);
586 else {
587 ret = task->tk_status;
588 rpc_put_task(task);
589 }
590 return ret;
591}
592
593int _nfs4_call_sync_session(struct nfs_server *server,
594 struct rpc_message *msg,
595 struct nfs4_sequence_args *args,
596 struct nfs4_sequence_res *res,
597 int cache_reply)
598{
599 return nfs4_call_sync_sequence(server->nfs_client, server->client,
600 msg, args, res, cache_reply);
601}
602
603#endif /* CONFIG_NFS_V4_1 */
604
605int _nfs4_call_sync(struct nfs_server *server,
606 struct rpc_message *msg,
607 struct nfs4_sequence_args *args,
608 struct nfs4_sequence_res *res,
609 int cache_reply)
610{
611 args->sa_session = res->sr_session = NULL;
612 return rpc_call_sync(server->client, msg, 0);
613}
614
615#define nfs4_call_sync(server, msg, args, res, cache_reply) \
616 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
617 &(res)->seq_res, (cache_reply))
618
619static void nfs4_sequence_done(const struct nfs_server *server,
620 struct nfs4_sequence_res *res, int rpc_status)
621{
622#ifdef CONFIG_NFS_V4_1
623 if (nfs4_has_session(server->nfs_client))
624 nfs41_sequence_done(server->nfs_client, res, rpc_status);
625#endif /* CONFIG_NFS_V4_1 */
626}
627
628static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
629{
630 struct nfs_inode *nfsi = NFS_I(dir);
631
632 spin_lock(&dir->i_lock);
633 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
634 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
635 nfs_force_lookup_revalidate(dir);
636 nfsi->change_attr = cinfo->after;
637 spin_unlock(&dir->i_lock);
638}
639
640struct nfs4_opendata {
641 struct kref kref;
642 struct nfs_openargs o_arg;
643 struct nfs_openres o_res;
644 struct nfs_open_confirmargs c_arg;
645 struct nfs_open_confirmres c_res;
646 struct nfs_fattr f_attr;
647 struct nfs_fattr dir_attr;
648 struct path path;
649 struct dentry *dir;
650 struct nfs4_state_owner *owner;
651 struct nfs4_state *state;
652 struct iattr attrs;
653 unsigned long timestamp;
654 unsigned int rpc_done : 1;
655 int rpc_status;
656 int cancelled;
657};
658
659
660static void nfs4_init_opendata_res(struct nfs4_opendata *p)
661{
662 p->o_res.f_attr = &p->f_attr;
663 p->o_res.dir_attr = &p->dir_attr;
664 p->o_res.seqid = p->o_arg.seqid;
665 p->c_res.seqid = p->c_arg.seqid;
666 p->o_res.server = p->o_arg.server;
667 nfs_fattr_init(&p->f_attr);
668 nfs_fattr_init(&p->dir_attr);
669 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
670}
671
672static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
673 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
674 const struct iattr *attrs)
675{
676 struct dentry *parent = dget_parent(path->dentry);
677 struct inode *dir = parent->d_inode;
678 struct nfs_server *server = NFS_SERVER(dir);
679 struct nfs4_opendata *p;
680
681 p = kzalloc(sizeof(*p), GFP_KERNEL);
682 if (p == NULL)
683 goto err;
684 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
685 if (p->o_arg.seqid == NULL)
686 goto err_free;
687 p->path.mnt = mntget(path->mnt);
688 p->path.dentry = dget(path->dentry);
689 p->dir = parent;
690 p->owner = sp;
691 atomic_inc(&sp->so_count);
692 p->o_arg.fh = NFS_FH(dir);
693 p->o_arg.open_flags = flags;
694 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
695 p->o_arg.clientid = server->nfs_client->cl_clientid;
696 p->o_arg.id = sp->so_owner_id.id;
697 p->o_arg.name = &p->path.dentry->d_name;
698 p->o_arg.server = server;
699 p->o_arg.bitmask = server->attr_bitmask;
700 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
701 if (flags & O_EXCL) {
702 if (nfs4_has_persistent_session(server->nfs_client)) {
703 /* GUARDED */
704 p->o_arg.u.attrs = &p->attrs;
705 memcpy(&p->attrs, attrs, sizeof(p->attrs));
706 } else { /* EXCLUSIVE4_1 */
707 u32 *s = (u32 *) p->o_arg.u.verifier.data;
708 s[0] = jiffies;
709 s[1] = current->pid;
710 }
711 } else if (flags & O_CREAT) {
712 p->o_arg.u.attrs = &p->attrs;
713 memcpy(&p->attrs, attrs, sizeof(p->attrs));
714 }
715 p->c_arg.fh = &p->o_res.fh;
716 p->c_arg.stateid = &p->o_res.stateid;
717 p->c_arg.seqid = p->o_arg.seqid;
718 nfs4_init_opendata_res(p);
719 kref_init(&p->kref);
720 return p;
721err_free:
722 kfree(p);
723err:
724 dput(parent);
725 return NULL;
726}
727
728static void nfs4_opendata_free(struct kref *kref)
729{
730 struct nfs4_opendata *p = container_of(kref,
731 struct nfs4_opendata, kref);
732
733 nfs_free_seqid(p->o_arg.seqid);
734 if (p->state != NULL)
735 nfs4_put_open_state(p->state);
736 nfs4_put_state_owner(p->owner);
737 dput(p->dir);
738 path_put(&p->path);
739 kfree(p);
740}
741
742static void nfs4_opendata_put(struct nfs4_opendata *p)
743{
744 if (p != NULL)
745 kref_put(&p->kref, nfs4_opendata_free);
746}
747
748static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
749{
750 int ret;
751
752 ret = rpc_wait_for_completion_task(task);
753 return ret;
754}
755
756static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
757{
758 int ret = 0;
759
760 if (open_mode & O_EXCL)
761 goto out;
762 switch (mode & (FMODE_READ|FMODE_WRITE)) {
763 case FMODE_READ:
764 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
765 break;
766 case FMODE_WRITE:
767 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
768 break;
769 case FMODE_READ|FMODE_WRITE:
770 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
771 }
772out:
773 return ret;
774}
775
776static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
777{
778 if ((delegation->type & fmode) != fmode)
779 return 0;
780 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
781 return 0;
782 nfs_mark_delegation_referenced(delegation);
783 return 1;
784}
785
786static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
787{
788 switch (fmode) {
789 case FMODE_WRITE:
790 state->n_wronly++;
791 break;
792 case FMODE_READ:
793 state->n_rdonly++;
794 break;
795 case FMODE_READ|FMODE_WRITE:
796 state->n_rdwr++;
797 }
798 nfs4_state_set_mode_locked(state, state->state | fmode);
799}
800
801static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
802{
803 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
804 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
805 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
806 switch (fmode) {
807 case FMODE_READ:
808 set_bit(NFS_O_RDONLY_STATE, &state->flags);
809 break;
810 case FMODE_WRITE:
811 set_bit(NFS_O_WRONLY_STATE, &state->flags);
812 break;
813 case FMODE_READ|FMODE_WRITE:
814 set_bit(NFS_O_RDWR_STATE, &state->flags);
815 }
816}
817
818static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
819{
820 write_seqlock(&state->seqlock);
821 nfs_set_open_stateid_locked(state, stateid, fmode);
822 write_sequnlock(&state->seqlock);
823}
824
825static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
826{
827 /*
828 * Protect the call to nfs4_state_set_mode_locked and
829 * serialise the stateid update
830 */
831 write_seqlock(&state->seqlock);
832 if (deleg_stateid != NULL) {
833 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
834 set_bit(NFS_DELEGATED_STATE, &state->flags);
835 }
836 if (open_stateid != NULL)
837 nfs_set_open_stateid_locked(state, open_stateid, fmode);
838 write_sequnlock(&state->seqlock);
839 spin_lock(&state->owner->so_lock);
840 update_open_stateflags(state, fmode);
841 spin_unlock(&state->owner->so_lock);
842}
843
844static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
845{
846 struct nfs_inode *nfsi = NFS_I(state->inode);
847 struct nfs_delegation *deleg_cur;
848 int ret = 0;
849
850 fmode &= (FMODE_READ|FMODE_WRITE);
851
852 rcu_read_lock();
853 deleg_cur = rcu_dereference(nfsi->delegation);
854 if (deleg_cur == NULL)
855 goto no_delegation;
856
857 spin_lock(&deleg_cur->lock);
858 if (nfsi->delegation != deleg_cur ||
859 (deleg_cur->type & fmode) != fmode)
860 goto no_delegation_unlock;
861
862 if (delegation == NULL)
863 delegation = &deleg_cur->stateid;
864 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
865 goto no_delegation_unlock;
866
867 nfs_mark_delegation_referenced(deleg_cur);
868 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
869 ret = 1;
870no_delegation_unlock:
871 spin_unlock(&deleg_cur->lock);
872no_delegation:
873 rcu_read_unlock();
874
875 if (!ret && open_stateid != NULL) {
876 __update_open_stateid(state, open_stateid, NULL, fmode);
877 ret = 1;
878 }
879
880 return ret;
881}
882
883
884static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
885{
886 struct nfs_delegation *delegation;
887
888 rcu_read_lock();
889 delegation = rcu_dereference(NFS_I(inode)->delegation);
890 if (delegation == NULL || (delegation->type & fmode) == fmode) {
891 rcu_read_unlock();
892 return;
893 }
894 rcu_read_unlock();
895 nfs_inode_return_delegation(inode);
896}
897
898static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
899{
900 struct nfs4_state *state = opendata->state;
901 struct nfs_inode *nfsi = NFS_I(state->inode);
902 struct nfs_delegation *delegation;
903 int open_mode = opendata->o_arg.open_flags & O_EXCL;
904 fmode_t fmode = opendata->o_arg.fmode;
905 nfs4_stateid stateid;
906 int ret = -EAGAIN;
907
908 for (;;) {
909 if (can_open_cached(state, fmode, open_mode)) {
910 spin_lock(&state->owner->so_lock);
911 if (can_open_cached(state, fmode, open_mode)) {
912 update_open_stateflags(state, fmode);
913 spin_unlock(&state->owner->so_lock);
914 goto out_return_state;
915 }
916 spin_unlock(&state->owner->so_lock);
917 }
918 rcu_read_lock();
919 delegation = rcu_dereference(nfsi->delegation);
920 if (delegation == NULL ||
921 !can_open_delegated(delegation, fmode)) {
922 rcu_read_unlock();
923 break;
924 }
925 /* Save the delegation */
926 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
927 rcu_read_unlock();
928 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
929 if (ret != 0)
930 goto out;
931 ret = -EAGAIN;
932
933 /* Try to update the stateid using the delegation */
934 if (update_open_stateid(state, NULL, &stateid, fmode))
935 goto out_return_state;
936 }
937out:
938 return ERR_PTR(ret);
939out_return_state:
940 atomic_inc(&state->count);
941 return state;
942}
943
944static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
945{
946 struct inode *inode;
947 struct nfs4_state *state = NULL;
948 struct nfs_delegation *delegation;
949 int ret;
950
951 if (!data->rpc_done) {
952 state = nfs4_try_open_cached(data);
953 goto out;
954 }
955
956 ret = -EAGAIN;
957 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
958 goto err;
959 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
960 ret = PTR_ERR(inode);
961 if (IS_ERR(inode))
962 goto err;
963 ret = -ENOMEM;
964 state = nfs4_get_open_state(inode, data->owner);
965 if (state == NULL)
966 goto err_put_inode;
967 if (data->o_res.delegation_type != 0) {
968 int delegation_flags = 0;
969
970 rcu_read_lock();
971 delegation = rcu_dereference(NFS_I(inode)->delegation);
972 if (delegation)
973 delegation_flags = delegation->flags;
974 rcu_read_unlock();
975 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
976 nfs_inode_set_delegation(state->inode,
977 data->owner->so_cred,
978 &data->o_res);
979 else
980 nfs_inode_reclaim_delegation(state->inode,
981 data->owner->so_cred,
982 &data->o_res);
983 }
984
985 update_open_stateid(state, &data->o_res.stateid, NULL,
986 data->o_arg.fmode);
987 iput(inode);
988out:
989 return state;
990err_put_inode:
991 iput(inode);
992err:
993 return ERR_PTR(ret);
994}
995
996static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
997{
998 struct nfs_inode *nfsi = NFS_I(state->inode);
999 struct nfs_open_context *ctx;
1000
1001 spin_lock(&state->inode->i_lock);
1002 list_for_each_entry(ctx, &nfsi->open_files, list) {
1003 if (ctx->state != state)
1004 continue;
1005 get_nfs_open_context(ctx);
1006 spin_unlock(&state->inode->i_lock);
1007 return ctx;
1008 }
1009 spin_unlock(&state->inode->i_lock);
1010 return ERR_PTR(-ENOENT);
1011}
1012
1013static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1014{
1015 struct nfs4_opendata *opendata;
1016
1017 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1018 if (opendata == NULL)
1019 return ERR_PTR(-ENOMEM);
1020 opendata->state = state;
1021 atomic_inc(&state->count);
1022 return opendata;
1023}
1024
1025static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1026{
1027 struct nfs4_state *newstate;
1028 int ret;
1029
1030 opendata->o_arg.open_flags = 0;
1031 opendata->o_arg.fmode = fmode;
1032 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1033 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1034 nfs4_init_opendata_res(opendata);
1035 ret = _nfs4_proc_open(opendata);
1036 if (ret != 0)
1037 return ret;
1038 newstate = nfs4_opendata_to_nfs4_state(opendata);
1039 if (IS_ERR(newstate))
1040 return PTR_ERR(newstate);
1041 nfs4_close_state(&opendata->path, newstate, fmode);
1042 *res = newstate;
1043 return 0;
1044}
1045
1046static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1047{
1048 struct nfs4_state *newstate;
1049 int ret;
1050
1051 /* memory barrier prior to reading state->n_* */
1052 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1053 smp_rmb();
1054 if (state->n_rdwr != 0) {
1055 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1056 if (ret != 0)
1057 return ret;
1058 if (newstate != state)
1059 return -ESTALE;
1060 }
1061 if (state->n_wronly != 0) {
1062 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1063 if (ret != 0)
1064 return ret;
1065 if (newstate != state)
1066 return -ESTALE;
1067 }
1068 if (state->n_rdonly != 0) {
1069 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1070 if (ret != 0)
1071 return ret;
1072 if (newstate != state)
1073 return -ESTALE;
1074 }
1075 /*
1076 * We may have performed cached opens for all three recoveries.
1077 * Check if we need to update the current stateid.
1078 */
1079 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1080 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1081 write_seqlock(&state->seqlock);
1082 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1083 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1084 write_sequnlock(&state->seqlock);
1085 }
1086 return 0;
1087}
1088
1089/*
1090 * OPEN_RECLAIM:
1091 * reclaim state on the server after a reboot.
1092 */
1093static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1094{
1095 struct nfs_delegation *delegation;
1096 struct nfs4_opendata *opendata;
1097 fmode_t delegation_type = 0;
1098 int status;
1099
1100 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1101 if (IS_ERR(opendata))
1102 return PTR_ERR(opendata);
1103 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1104 opendata->o_arg.fh = NFS_FH(state->inode);
1105 rcu_read_lock();
1106 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1107 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1108 delegation_type = delegation->type;
1109 rcu_read_unlock();
1110 opendata->o_arg.u.delegation_type = delegation_type;
1111 status = nfs4_open_recover(opendata, state);
1112 nfs4_opendata_put(opendata);
1113 return status;
1114}
1115
1116static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1117{
1118 struct nfs_server *server = NFS_SERVER(state->inode);
1119 struct nfs4_exception exception = { };
1120 int err;
1121 do {
1122 err = _nfs4_do_open_reclaim(ctx, state);
1123 if (err != -NFS4ERR_DELAY)
1124 break;
1125 nfs4_handle_exception(server, err, &exception);
1126 } while (exception.retry);
1127 return err;
1128}
1129
1130static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1131{
1132 struct nfs_open_context *ctx;
1133 int ret;
1134
1135 ctx = nfs4_state_find_open_context(state);
1136 if (IS_ERR(ctx))
1137 return PTR_ERR(ctx);
1138 ret = nfs4_do_open_reclaim(ctx, state);
1139 put_nfs_open_context(ctx);
1140 return ret;
1141}
1142
1143static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1144{
1145 struct nfs4_opendata *opendata;
1146 int ret;
1147
1148 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1149 if (IS_ERR(opendata))
1150 return PTR_ERR(opendata);
1151 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1152 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1153 sizeof(opendata->o_arg.u.delegation.data));
1154 ret = nfs4_open_recover(opendata, state);
1155 nfs4_opendata_put(opendata);
1156 return ret;
1157}
1158
1159int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1160{
1161 struct nfs4_exception exception = { };
1162 struct nfs_server *server = NFS_SERVER(state->inode);
1163 int err;
1164 do {
1165 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1166 switch (err) {
1167 case 0:
1168 case -ENOENT:
1169 case -ESTALE:
1170 goto out;
1171 case -NFS4ERR_BADSESSION:
1172 case -NFS4ERR_BADSLOT:
1173 case -NFS4ERR_BAD_HIGH_SLOT:
1174 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1175 case -NFS4ERR_DEADSESSION:
1176 nfs4_schedule_state_recovery(
1177 server->nfs_client);
1178 goto out;
1179 case -NFS4ERR_STALE_CLIENTID:
1180 case -NFS4ERR_STALE_STATEID:
1181 case -NFS4ERR_EXPIRED:
1182 /* Don't recall a delegation if it was lost */
1183 nfs4_schedule_state_recovery(server->nfs_client);
1184 goto out;
1185 case -ERESTARTSYS:
1186 /*
1187 * The show must go on: exit, but mark the
1188 * stateid as needing recovery.
1189 */
1190 case -NFS4ERR_ADMIN_REVOKED:
1191 case -NFS4ERR_BAD_STATEID:
1192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1193 case -ENOMEM:
1194 err = 0;
1195 goto out;
1196 }
1197 err = nfs4_handle_exception(server, err, &exception);
1198 } while (exception.retry);
1199out:
1200 return err;
1201}
1202
1203static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1204{
1205 struct nfs4_opendata *data = calldata;
1206
1207 data->rpc_status = task->tk_status;
1208 if (RPC_ASSASSINATED(task))
1209 return;
1210 if (data->rpc_status == 0) {
1211 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1212 sizeof(data->o_res.stateid.data));
1213 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1214 renew_lease(data->o_res.server, data->timestamp);
1215 data->rpc_done = 1;
1216 }
1217}
1218
1219static void nfs4_open_confirm_release(void *calldata)
1220{
1221 struct nfs4_opendata *data = calldata;
1222 struct nfs4_state *state = NULL;
1223
1224 /* If this request hasn't been cancelled, do nothing */
1225 if (data->cancelled == 0)
1226 goto out_free;
1227 /* In case of error, no cleanup! */
1228 if (!data->rpc_done)
1229 goto out_free;
1230 state = nfs4_opendata_to_nfs4_state(data);
1231 if (!IS_ERR(state))
1232 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1233out_free:
1234 nfs4_opendata_put(data);
1235}
1236
1237static const struct rpc_call_ops nfs4_open_confirm_ops = {
1238 .rpc_call_done = nfs4_open_confirm_done,
1239 .rpc_release = nfs4_open_confirm_release,
1240};
1241
1242/*
1243 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1244 */
1245static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1246{
1247 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1248 struct rpc_task *task;
1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1251 .rpc_argp = &data->c_arg,
1252 .rpc_resp = &data->c_res,
1253 .rpc_cred = data->owner->so_cred,
1254 };
1255 struct rpc_task_setup task_setup_data = {
1256 .rpc_client = server->client,
1257 .rpc_message = &msg,
1258 .callback_ops = &nfs4_open_confirm_ops,
1259 .callback_data = data,
1260 .workqueue = nfsiod_workqueue,
1261 .flags = RPC_TASK_ASYNC,
1262 };
1263 int status;
1264
1265 kref_get(&data->kref);
1266 data->rpc_done = 0;
1267 data->rpc_status = 0;
1268 data->timestamp = jiffies;
1269 task = rpc_run_task(&task_setup_data);
1270 if (IS_ERR(task))
1271 return PTR_ERR(task);
1272 status = nfs4_wait_for_completion_rpc_task(task);
1273 if (status != 0) {
1274 data->cancelled = 1;
1275 smp_wmb();
1276 } else
1277 status = data->rpc_status;
1278 rpc_put_task(task);
1279 return status;
1280}
1281
1282static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1283{
1284 struct nfs4_opendata *data = calldata;
1285 struct nfs4_state_owner *sp = data->owner;
1286
1287 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1288 return;
1289 /*
1290 * Check if we still need to send an OPEN call, or if we can use
1291 * a delegation instead.
1292 */
1293 if (data->state != NULL) {
1294 struct nfs_delegation *delegation;
1295
1296 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1297 goto out_no_action;
1298 rcu_read_lock();
1299 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1300 if (delegation != NULL &&
1301 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1302 rcu_read_unlock();
1303 goto out_no_action;
1304 }
1305 rcu_read_unlock();
1306 }
1307 /* Update sequence id. */
1308 data->o_arg.id = sp->so_owner_id.id;
1309 data->o_arg.clientid = sp->so_client->cl_clientid;
1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1311 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1312 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1313 }
1314 data->timestamp = jiffies;
1315 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1316 &data->o_arg.seq_args,
1317 &data->o_res.seq_res, 1, task))
1318 return;
1319 rpc_call_start(task);
1320 return;
1321out_no_action:
1322 task->tk_action = NULL;
1323
1324}
1325
1326static void nfs4_open_done(struct rpc_task *task, void *calldata)
1327{
1328 struct nfs4_opendata *data = calldata;
1329
1330 data->rpc_status = task->tk_status;
1331
1332 nfs4_sequence_done(data->o_arg.server, &data->o_res.seq_res,
1333 task->tk_status);
1334
1335 if (RPC_ASSASSINATED(task))
1336 return;
1337 if (task->tk_status == 0) {
1338 switch (data->o_res.f_attr->mode & S_IFMT) {
1339 case S_IFREG:
1340 break;
1341 case S_IFLNK:
1342 data->rpc_status = -ELOOP;
1343 break;
1344 case S_IFDIR:
1345 data->rpc_status = -EISDIR;
1346 break;
1347 default:
1348 data->rpc_status = -ENOTDIR;
1349 }
1350 renew_lease(data->o_res.server, data->timestamp);
1351 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1352 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1353 }
1354 data->rpc_done = 1;
1355}
1356
1357static void nfs4_open_release(void *calldata)
1358{
1359 struct nfs4_opendata *data = calldata;
1360 struct nfs4_state *state = NULL;
1361
1362 /* If this request hasn't been cancelled, do nothing */
1363 if (data->cancelled == 0)
1364 goto out_free;
1365 /* In case of error, no cleanup! */
1366 if (data->rpc_status != 0 || !data->rpc_done)
1367 goto out_free;
1368 /* In case we need an open_confirm, no cleanup! */
1369 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1370 goto out_free;
1371 state = nfs4_opendata_to_nfs4_state(data);
1372 if (!IS_ERR(state))
1373 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1374out_free:
1375 nfs4_opendata_put(data);
1376}
1377
1378static const struct rpc_call_ops nfs4_open_ops = {
1379 .rpc_call_prepare = nfs4_open_prepare,
1380 .rpc_call_done = nfs4_open_done,
1381 .rpc_release = nfs4_open_release,
1382};
1383
1384/*
1385 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1386 */
1387static int _nfs4_proc_open(struct nfs4_opendata *data)
1388{
1389 struct inode *dir = data->dir->d_inode;
1390 struct nfs_server *server = NFS_SERVER(dir);
1391 struct nfs_openargs *o_arg = &data->o_arg;
1392 struct nfs_openres *o_res = &data->o_res;
1393 struct rpc_task *task;
1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1396 .rpc_argp = o_arg,
1397 .rpc_resp = o_res,
1398 .rpc_cred = data->owner->so_cred,
1399 };
1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
1402 .rpc_message = &msg,
1403 .callback_ops = &nfs4_open_ops,
1404 .callback_data = data,
1405 .workqueue = nfsiod_workqueue,
1406 .flags = RPC_TASK_ASYNC,
1407 };
1408 int status;
1409
1410 kref_get(&data->kref);
1411 data->rpc_done = 0;
1412 data->rpc_status = 0;
1413 data->cancelled = 0;
1414 task = rpc_run_task(&task_setup_data);
1415 if (IS_ERR(task))
1416 return PTR_ERR(task);
1417 status = nfs4_wait_for_completion_rpc_task(task);
1418 if (status != 0) {
1419 data->cancelled = 1;
1420 smp_wmb();
1421 } else
1422 status = data->rpc_status;
1423 rpc_put_task(task);
1424 if (status != 0 || !data->rpc_done)
1425 return status;
1426
1427 if (o_res->fh.size == 0)
1428 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1429
1430 if (o_arg->open_flags & O_CREAT) {
1431 update_changeattr(dir, &o_res->cinfo);
1432 nfs_post_op_update_inode(dir, o_res->dir_attr);
1433 } else
1434 nfs_refresh_inode(dir, o_res->dir_attr);
1435 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1436 status = _nfs4_proc_open_confirm(data);
1437 if (status != 0)
1438 return status;
1439 }
1440 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1441 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1442 return 0;
1443}
1444
1445static int nfs4_recover_expired_lease(struct nfs_server *server)
1446{
1447 struct nfs_client *clp = server->nfs_client;
1448 unsigned int loop;
1449 int ret;
1450
1451 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1452 ret = nfs4_wait_clnt_recover(clp);
1453 if (ret != 0)
1454 break;
1455 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1456 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1457 break;
1458 nfs4_schedule_state_recovery(clp);
1459 ret = -EIO;
1460 }
1461 return ret;
1462}
1463
1464/*
1465 * OPEN_EXPIRED:
1466 * reclaim state on the server after a network partition.
1467 * Assumes caller holds the appropriate lock
1468 */
1469static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1470{
1471 struct nfs4_opendata *opendata;
1472 int ret;
1473
1474 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1475 if (IS_ERR(opendata))
1476 return PTR_ERR(opendata);
1477 ret = nfs4_open_recover(opendata, state);
1478 if (ret == -ESTALE)
1479 d_drop(ctx->path.dentry);
1480 nfs4_opendata_put(opendata);
1481 return ret;
1482}
1483
1484static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1485{
1486 struct nfs_server *server = NFS_SERVER(state->inode);
1487 struct nfs4_exception exception = { };
1488 int err;
1489
1490 do {
1491 err = _nfs4_open_expired(ctx, state);
1492 switch (err) {
1493 default:
1494 goto out;
1495 case -NFS4ERR_GRACE:
1496 case -NFS4ERR_DELAY:
1497 nfs4_handle_exception(server, err, &exception);
1498 err = 0;
1499 }
1500 } while (exception.retry);
1501out:
1502 return err;
1503}
1504
1505static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1506{
1507 struct nfs_open_context *ctx;
1508 int ret;
1509
1510 ctx = nfs4_state_find_open_context(state);
1511 if (IS_ERR(ctx))
1512 return PTR_ERR(ctx);
1513 ret = nfs4_do_open_expired(ctx, state);
1514 put_nfs_open_context(ctx);
1515 return ret;
1516}
1517
1518/*
1519 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1520 * fields corresponding to attributes that were used to store the verifier.
1521 * Make sure we clobber those fields in the later setattr call
1522 */
1523static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1524{
1525 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1526 !(sattr->ia_valid & ATTR_ATIME_SET))
1527 sattr->ia_valid |= ATTR_ATIME;
1528
1529 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1530 !(sattr->ia_valid & ATTR_MTIME_SET))
1531 sattr->ia_valid |= ATTR_MTIME;
1532}
1533
1534/*
1535 * Returns a referenced nfs4_state
1536 */
1537static 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)
1538{
1539 struct nfs4_state_owner *sp;
1540 struct nfs4_state *state = NULL;
1541 struct nfs_server *server = NFS_SERVER(dir);
1542 struct nfs4_opendata *opendata;
1543 int status;
1544
1545 /* Protect against reboot recovery conflicts */
1546 status = -ENOMEM;
1547 if (!(sp = nfs4_get_state_owner(server, cred))) {
1548 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1549 goto out_err;
1550 }
1551 status = nfs4_recover_expired_lease(server);
1552 if (status != 0)
1553 goto err_put_state_owner;
1554 if (path->dentry->d_inode != NULL)
1555 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1556 status = -ENOMEM;
1557 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1558 if (opendata == NULL)
1559 goto err_put_state_owner;
1560
1561 if (path->dentry->d_inode != NULL)
1562 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1563
1564 status = _nfs4_proc_open(opendata);
1565 if (status != 0)
1566 goto err_opendata_put;
1567
1568 if (opendata->o_arg.open_flags & O_EXCL)
1569 nfs4_exclusive_attrset(opendata, sattr);
1570
1571 state = nfs4_opendata_to_nfs4_state(opendata);
1572 status = PTR_ERR(state);
1573 if (IS_ERR(state))
1574 goto err_opendata_put;
1575 nfs4_opendata_put(opendata);
1576 nfs4_put_state_owner(sp);
1577 *res = state;
1578 return 0;
1579err_opendata_put:
1580 nfs4_opendata_put(opendata);
1581err_put_state_owner:
1582 nfs4_put_state_owner(sp);
1583out_err:
1584 *res = NULL;
1585 return status;
1586}
1587
1588
1589static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1590{
1591 struct nfs4_exception exception = { };
1592 struct nfs4_state *res;
1593 int status;
1594
1595 do {
1596 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1597 if (status == 0)
1598 break;
1599 /* NOTE: BAD_SEQID means the server and client disagree about the
1600 * book-keeping w.r.t. state-changing operations
1601 * (OPEN/CLOSE/LOCK/LOCKU...)
1602 * It is actually a sign of a bug on the client or on the server.
1603 *
1604 * If we receive a BAD_SEQID error in the particular case of
1605 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1606 * have unhashed the old state_owner for us, and that we can
1607 * therefore safely retry using a new one. We should still warn
1608 * the user though...
1609 */
1610 if (status == -NFS4ERR_BAD_SEQID) {
1611 printk(KERN_WARNING "NFS: v4 server %s "
1612 " returned a bad sequence-id error!\n",
1613 NFS_SERVER(dir)->nfs_client->cl_hostname);
1614 exception.retry = 1;
1615 continue;
1616 }
1617 /*
1618 * BAD_STATEID on OPEN means that the server cancelled our
1619 * state before it received the OPEN_CONFIRM.
1620 * Recover by retrying the request as per the discussion
1621 * on Page 181 of RFC3530.
1622 */
1623 if (status == -NFS4ERR_BAD_STATEID) {
1624 exception.retry = 1;
1625 continue;
1626 }
1627 if (status == -EAGAIN) {
1628 /* We must have found a delegation */
1629 exception.retry = 1;
1630 continue;
1631 }
1632 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1633 status, &exception));
1634 } while (exception.retry);
1635 return res;
1636}
1637
1638static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1639 struct nfs_fattr *fattr, struct iattr *sattr,
1640 struct nfs4_state *state)
1641{
1642 struct nfs_server *server = NFS_SERVER(inode);
1643 struct nfs_setattrargs arg = {
1644 .fh = NFS_FH(inode),
1645 .iap = sattr,
1646 .server = server,
1647 .bitmask = server->attr_bitmask,
1648 };
1649 struct nfs_setattrres res = {
1650 .fattr = fattr,
1651 .server = server,
1652 };
1653 struct rpc_message msg = {
1654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1655 .rpc_argp = &arg,
1656 .rpc_resp = &res,
1657 .rpc_cred = cred,
1658 };
1659 unsigned long timestamp = jiffies;
1660 int status;
1661
1662 nfs_fattr_init(fattr);
1663
1664 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1665 /* Use that stateid */
1666 } else if (state != NULL) {
1667 nfs4_copy_stateid(&arg.stateid, state, current->files);
1668 } else
1669 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1670
1671 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1672 if (status == 0 && state != NULL)
1673 renew_lease(server, timestamp);
1674 return status;
1675}
1676
1677static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1678 struct nfs_fattr *fattr, struct iattr *sattr,
1679 struct nfs4_state *state)
1680{
1681 struct nfs_server *server = NFS_SERVER(inode);
1682 struct nfs4_exception exception = { };
1683 int err;
1684 do {
1685 err = nfs4_handle_exception(server,
1686 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1687 &exception);
1688 } while (exception.retry);
1689 return err;
1690}
1691
1692struct nfs4_closedata {
1693 struct path path;
1694 struct inode *inode;
1695 struct nfs4_state *state;
1696 struct nfs_closeargs arg;
1697 struct nfs_closeres res;
1698 struct nfs_fattr fattr;
1699 unsigned long timestamp;
1700};
1701
1702static void nfs4_free_closedata(void *data)
1703{
1704 struct nfs4_closedata *calldata = data;
1705 struct nfs4_state_owner *sp = calldata->state->owner;
1706
1707 nfs4_put_open_state(calldata->state);
1708 nfs_free_seqid(calldata->arg.seqid);
1709 nfs4_put_state_owner(sp);
1710 path_put(&calldata->path);
1711 kfree(calldata);
1712}
1713
1714static void nfs4_close_done(struct rpc_task *task, void *data)
1715{
1716 struct nfs4_closedata *calldata = data;
1717 struct nfs4_state *state = calldata->state;
1718 struct nfs_server *server = NFS_SERVER(calldata->inode);
1719
1720 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1721 if (RPC_ASSASSINATED(task))
1722 return;
1723 /* hmm. we are done with the inode, and in the process of freeing
1724 * the state_owner. we keep this around to process errors
1725 */
1726 switch (task->tk_status) {
1727 case 0:
1728 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1729 renew_lease(server, calldata->timestamp);
1730 break;
1731 case -NFS4ERR_STALE_STATEID:
1732 case -NFS4ERR_OLD_STATEID:
1733 case -NFS4ERR_BAD_STATEID:
1734 case -NFS4ERR_EXPIRED:
1735 if (calldata->arg.fmode == 0)
1736 break;
1737 default:
1738 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1739 nfs_restart_rpc(task, server->nfs_client);
1740 return;
1741 }
1742 }
1743 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1744}
1745
1746static void nfs4_close_prepare(struct rpc_task *task, void *data)
1747{
1748 struct nfs4_closedata *calldata = data;
1749 struct nfs4_state *state = calldata->state;
1750 int clear_rd, clear_wr, clear_rdwr;
1751
1752 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1753 return;
1754
1755 clear_rd = clear_wr = clear_rdwr = 0;
1756 spin_lock(&state->owner->so_lock);
1757 /* Calculate the change in open mode */
1758 if (state->n_rdwr == 0) {
1759 if (state->n_rdonly == 0) {
1760 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1761 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1762 }
1763 if (state->n_wronly == 0) {
1764 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1765 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1766 }
1767 }
1768 spin_unlock(&state->owner->so_lock);
1769 if (!clear_rd && !clear_wr && !clear_rdwr) {
1770 /* Note: exit _without_ calling nfs4_close_done */
1771 task->tk_action = NULL;
1772 return;
1773 }
1774 nfs_fattr_init(calldata->res.fattr);
1775 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1776 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1777 calldata->arg.fmode = FMODE_READ;
1778 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1779 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1780 calldata->arg.fmode = FMODE_WRITE;
1781 }
1782 calldata->timestamp = jiffies;
1783 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1784 &calldata->arg.seq_args, &calldata->res.seq_res,
1785 1, task))
1786 return;
1787 rpc_call_start(task);
1788}
1789
1790static const struct rpc_call_ops nfs4_close_ops = {
1791 .rpc_call_prepare = nfs4_close_prepare,
1792 .rpc_call_done = nfs4_close_done,
1793 .rpc_release = nfs4_free_closedata,
1794};
1795
1796/*
1797 * It is possible for data to be read/written from a mem-mapped file
1798 * after the sys_close call (which hits the vfs layer as a flush).
1799 * This means that we can't safely call nfsv4 close on a file until
1800 * the inode is cleared. This in turn means that we are not good
1801 * NFSv4 citizens - we do not indicate to the server to update the file's
1802 * share state even when we are done with one of the three share
1803 * stateid's in the inode.
1804 *
1805 * NOTE: Caller must be holding the sp->so_owner semaphore!
1806 */
1807int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1808{
1809 struct nfs_server *server = NFS_SERVER(state->inode);
1810 struct nfs4_closedata *calldata;
1811 struct nfs4_state_owner *sp = state->owner;
1812 struct rpc_task *task;
1813 struct rpc_message msg = {
1814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1815 .rpc_cred = state->owner->so_cred,
1816 };
1817 struct rpc_task_setup task_setup_data = {
1818 .rpc_client = server->client,
1819 .rpc_message = &msg,
1820 .callback_ops = &nfs4_close_ops,
1821 .workqueue = nfsiod_workqueue,
1822 .flags = RPC_TASK_ASYNC,
1823 };
1824 int status = -ENOMEM;
1825
1826 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1827 if (calldata == NULL)
1828 goto out;
1829 calldata->inode = state->inode;
1830 calldata->state = state;
1831 calldata->arg.fh = NFS_FH(state->inode);
1832 calldata->arg.stateid = &state->open_stateid;
1833 if (nfs4_has_session(server->nfs_client))
1834 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1835 /* Serialization for the sequence id */
1836 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1837 if (calldata->arg.seqid == NULL)
1838 goto out_free_calldata;
1839 calldata->arg.fmode = 0;
1840 calldata->arg.bitmask = server->cache_consistency_bitmask;
1841 calldata->res.fattr = &calldata->fattr;
1842 calldata->res.seqid = calldata->arg.seqid;
1843 calldata->res.server = server;
1844 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1845 calldata->path.mnt = mntget(path->mnt);
1846 calldata->path.dentry = dget(path->dentry);
1847
1848 msg.rpc_argp = &calldata->arg,
1849 msg.rpc_resp = &calldata->res,
1850 task_setup_data.callback_data = calldata;
1851 task = rpc_run_task(&task_setup_data);
1852 if (IS_ERR(task))
1853 return PTR_ERR(task);
1854 status = 0;
1855 if (wait)
1856 status = rpc_wait_for_completion_task(task);
1857 rpc_put_task(task);
1858 return status;
1859out_free_calldata:
1860 kfree(calldata);
1861out:
1862 nfs4_put_open_state(state);
1863 nfs4_put_state_owner(sp);
1864 return status;
1865}
1866
1867static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1868{
1869 struct file *filp;
1870 int ret;
1871
1872 /* If the open_intent is for execute, we have an extra check to make */
1873 if (fmode & FMODE_EXEC) {
1874 ret = nfs_may_open(state->inode,
1875 state->owner->so_cred,
1876 nd->intent.open.flags);
1877 if (ret < 0)
1878 goto out_close;
1879 }
1880 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1881 if (!IS_ERR(filp)) {
1882 struct nfs_open_context *ctx;
1883 ctx = nfs_file_open_context(filp);
1884 ctx->state = state;
1885 return 0;
1886 }
1887 ret = PTR_ERR(filp);
1888out_close:
1889 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1890 return ret;
1891}
1892
1893struct dentry *
1894nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1895{
1896 struct path path = {
1897 .mnt = nd->path.mnt,
1898 .dentry = dentry,
1899 };
1900 struct dentry *parent;
1901 struct iattr attr;
1902 struct rpc_cred *cred;
1903 struct nfs4_state *state;
1904 struct dentry *res;
1905 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1906
1907 if (nd->flags & LOOKUP_CREATE) {
1908 attr.ia_mode = nd->intent.open.create_mode;
1909 attr.ia_valid = ATTR_MODE;
1910 if (!IS_POSIXACL(dir))
1911 attr.ia_mode &= ~current_umask();
1912 } else {
1913 attr.ia_valid = 0;
1914 BUG_ON(nd->intent.open.flags & O_CREAT);
1915 }
1916
1917 cred = rpc_lookup_cred();
1918 if (IS_ERR(cred))
1919 return (struct dentry *)cred;
1920 parent = dentry->d_parent;
1921 /* Protect against concurrent sillydeletes */
1922 nfs_block_sillyrename(parent);
1923 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1924 put_rpccred(cred);
1925 if (IS_ERR(state)) {
1926 if (PTR_ERR(state) == -ENOENT) {
1927 d_add(dentry, NULL);
1928 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1929 }
1930 nfs_unblock_sillyrename(parent);
1931 return (struct dentry *)state;
1932 }
1933 res = d_add_unique(dentry, igrab(state->inode));
1934 if (res != NULL)
1935 path.dentry = res;
1936 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1937 nfs_unblock_sillyrename(parent);
1938 nfs4_intent_set_file(nd, &path, state, fmode);
1939 return res;
1940}
1941
1942int
1943nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1944{
1945 struct path path = {
1946 .mnt = nd->path.mnt,
1947 .dentry = dentry,
1948 };
1949 struct rpc_cred *cred;
1950 struct nfs4_state *state;
1951 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1952
1953 cred = rpc_lookup_cred();
1954 if (IS_ERR(cred))
1955 return PTR_ERR(cred);
1956 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1957 put_rpccred(cred);
1958 if (IS_ERR(state)) {
1959 switch (PTR_ERR(state)) {
1960 case -EPERM:
1961 case -EACCES:
1962 case -EDQUOT:
1963 case -ENOSPC:
1964 case -EROFS:
1965 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1966 return 1;
1967 default:
1968 goto out_drop;
1969 }
1970 }
1971 if (state->inode == dentry->d_inode) {
1972 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1973 nfs4_intent_set_file(nd, &path, state, fmode);
1974 return 1;
1975 }
1976 nfs4_close_sync(&path, state, fmode);
1977out_drop:
1978 d_drop(dentry);
1979 return 0;
1980}
1981
1982static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1983{
1984 if (ctx->state == NULL)
1985 return;
1986 if (is_sync)
1987 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1988 else
1989 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1990}
1991
1992static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1993{
1994 struct nfs4_server_caps_arg args = {
1995 .fhandle = fhandle,
1996 };
1997 struct nfs4_server_caps_res res = {};
1998 struct rpc_message msg = {
1999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2000 .rpc_argp = &args,
2001 .rpc_resp = &res,
2002 };
2003 int status;
2004
2005 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2006 if (status == 0) {
2007 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2008 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2009 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2010 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2011 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2012 NFS_CAP_CTIME|NFS_CAP_MTIME);
2013 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2014 server->caps |= NFS_CAP_ACLS;
2015 if (res.has_links != 0)
2016 server->caps |= NFS_CAP_HARDLINKS;
2017 if (res.has_symlinks != 0)
2018 server->caps |= NFS_CAP_SYMLINKS;
2019 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2020 server->caps |= NFS_CAP_FILEID;
2021 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2022 server->caps |= NFS_CAP_MODE;
2023 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2024 server->caps |= NFS_CAP_NLINK;
2025 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2026 server->caps |= NFS_CAP_OWNER;
2027 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2028 server->caps |= NFS_CAP_OWNER_GROUP;
2029 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2030 server->caps |= NFS_CAP_ATIME;
2031 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2032 server->caps |= NFS_CAP_CTIME;
2033 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2034 server->caps |= NFS_CAP_MTIME;
2035
2036 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2037 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2038 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2039 server->acl_bitmask = res.acl_bitmask;
2040 }
2041
2042 return status;
2043}
2044
2045int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2046{
2047 struct nfs4_exception exception = { };
2048 int err;
2049 do {
2050 err = nfs4_handle_exception(server,
2051 _nfs4_server_capabilities(server, fhandle),
2052 &exception);
2053 } while (exception.retry);
2054 return err;
2055}
2056
2057static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2058 struct nfs_fsinfo *info)
2059{
2060 struct nfs4_lookup_root_arg args = {
2061 .bitmask = nfs4_fattr_bitmap,
2062 };
2063 struct nfs4_lookup_res res = {
2064 .server = server,
2065 .fattr = info->fattr,
2066 .fh = fhandle,
2067 };
2068 struct rpc_message msg = {
2069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2070 .rpc_argp = &args,
2071 .rpc_resp = &res,
2072 };
2073
2074 nfs_fattr_init(info->fattr);
2075 return nfs4_call_sync(server, &msg, &args, &res, 0);
2076}
2077
2078static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2079 struct nfs_fsinfo *info)
2080{
2081 struct nfs4_exception exception = { };
2082 int err;
2083 do {
2084 err = nfs4_handle_exception(server,
2085 _nfs4_lookup_root(server, fhandle, info),
2086 &exception);
2087 } while (exception.retry);
2088 return err;
2089}
2090
2091/*
2092 * get the file handle for the "/" directory on the server
2093 */
2094static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2095 struct nfs_fsinfo *info)
2096{
2097 int status;
2098
2099 status = nfs4_lookup_root(server, fhandle, info);
2100 if (status == 0)
2101 status = nfs4_server_capabilities(server, fhandle);
2102 if (status == 0)
2103 status = nfs4_do_fsinfo(server, fhandle, info);
2104 return nfs4_map_errors(status);
2105}
2106
2107/*
2108 * Get locations and (maybe) other attributes of a referral.
2109 * Note that we'll actually follow the referral later when
2110 * we detect fsid mismatch in inode revalidation
2111 */
2112static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2113{
2114 int status = -ENOMEM;
2115 struct page *page = NULL;
2116 struct nfs4_fs_locations *locations = NULL;
2117
2118 page = alloc_page(GFP_KERNEL);
2119 if (page == NULL)
2120 goto out;
2121 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2122 if (locations == NULL)
2123 goto out;
2124
2125 status = nfs4_proc_fs_locations(dir, name, locations, page);
2126 if (status != 0)
2127 goto out;
2128 /* Make sure server returned a different fsid for the referral */
2129 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2130 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2131 status = -EIO;
2132 goto out;
2133 }
2134
2135 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2136 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2137 if (!fattr->mode)
2138 fattr->mode = S_IFDIR;
2139 memset(fhandle, 0, sizeof(struct nfs_fh));
2140out:
2141 if (page)
2142 __free_page(page);
2143 if (locations)
2144 kfree(locations);
2145 return status;
2146}
2147
2148static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2149{
2150 struct nfs4_getattr_arg args = {
2151 .fh = fhandle,
2152 .bitmask = server->attr_bitmask,
2153 };
2154 struct nfs4_getattr_res res = {
2155 .fattr = fattr,
2156 .server = server,
2157 };
2158 struct rpc_message msg = {
2159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2160 .rpc_argp = &args,
2161 .rpc_resp = &res,
2162 };
2163
2164 nfs_fattr_init(fattr);
2165 return nfs4_call_sync(server, &msg, &args, &res, 0);
2166}
2167
2168static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2169{
2170 struct nfs4_exception exception = { };
2171 int err;
2172 do {
2173 err = nfs4_handle_exception(server,
2174 _nfs4_proc_getattr(server, fhandle, fattr),
2175 &exception);
2176 } while (exception.retry);
2177 return err;
2178}
2179
2180/*
2181 * The file is not closed if it is opened due to the a request to change
2182 * the size of the file. The open call will not be needed once the
2183 * VFS layer lookup-intents are implemented.
2184 *
2185 * Close is called when the inode is destroyed.
2186 * If we haven't opened the file for O_WRONLY, we
2187 * need to in the size_change case to obtain a stateid.
2188 *
2189 * Got race?
2190 * Because OPEN is always done by name in nfsv4, it is
2191 * possible that we opened a different file by the same
2192 * name. We can recognize this race condition, but we
2193 * can't do anything about it besides returning an error.
2194 *
2195 * This will be fixed with VFS changes (lookup-intent).
2196 */
2197static int
2198nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2199 struct iattr *sattr)
2200{
2201 struct inode *inode = dentry->d_inode;
2202 struct rpc_cred *cred = NULL;
2203 struct nfs4_state *state = NULL;
2204 int status;
2205
2206 nfs_fattr_init(fattr);
2207
2208 /* Search for an existing open(O_WRITE) file */
2209 if (sattr->ia_valid & ATTR_FILE) {
2210 struct nfs_open_context *ctx;
2211
2212 ctx = nfs_file_open_context(sattr->ia_file);
2213 if (ctx) {
2214 cred = ctx->cred;
2215 state = ctx->state;
2216 }
2217 }
2218
2219 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2220 if (status == 0)
2221 nfs_setattr_update_inode(inode, sattr);
2222 return status;
2223}
2224
2225static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2226 const struct qstr *name, struct nfs_fh *fhandle,
2227 struct nfs_fattr *fattr)
2228{
2229 int status;
2230 struct nfs4_lookup_arg args = {
2231 .bitmask = server->attr_bitmask,
2232 .dir_fh = dirfh,
2233 .name = name,
2234 };
2235 struct nfs4_lookup_res res = {
2236 .server = server,
2237 .fattr = fattr,
2238 .fh = fhandle,
2239 };
2240 struct rpc_message msg = {
2241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2242 .rpc_argp = &args,
2243 .rpc_resp = &res,
2244 };
2245
2246 nfs_fattr_init(fattr);
2247
2248 dprintk("NFS call lookupfh %s\n", name->name);
2249 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2250 dprintk("NFS reply lookupfh: %d\n", status);
2251 return status;
2252}
2253
2254static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2255 struct qstr *name, struct nfs_fh *fhandle,
2256 struct nfs_fattr *fattr)
2257{
2258 struct nfs4_exception exception = { };
2259 int err;
2260 do {
2261 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2262 /* FIXME: !!!! */
2263 if (err == -NFS4ERR_MOVED) {
2264 err = -EREMOTE;
2265 break;
2266 }
2267 err = nfs4_handle_exception(server, err, &exception);
2268 } while (exception.retry);
2269 return err;
2270}
2271
2272static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2273 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2274{
2275 int status;
2276
2277 dprintk("NFS call lookup %s\n", name->name);
2278 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2279 if (status == -NFS4ERR_MOVED)
2280 status = nfs4_get_referral(dir, name, fattr, fhandle);
2281 dprintk("NFS reply lookup: %d\n", status);
2282 return status;
2283}
2284
2285static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2286{
2287 struct nfs4_exception exception = { };
2288 int err;
2289 do {
2290 err = nfs4_handle_exception(NFS_SERVER(dir),
2291 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2292 &exception);
2293 } while (exception.retry);
2294 return err;
2295}
2296
2297static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2298{
2299 struct nfs_server *server = NFS_SERVER(inode);
2300 struct nfs_fattr fattr;
2301 struct nfs4_accessargs args = {
2302 .fh = NFS_FH(inode),
2303 .bitmask = server->attr_bitmask,
2304 };
2305 struct nfs4_accessres res = {
2306 .server = server,
2307 .fattr = &fattr,
2308 };
2309 struct rpc_message msg = {
2310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2311 .rpc_argp = &args,
2312 .rpc_resp = &res,
2313 .rpc_cred = entry->cred,
2314 };
2315 int mode = entry->mask;
2316 int status;
2317
2318 /*
2319 * Determine which access bits we want to ask for...
2320 */
2321 if (mode & MAY_READ)
2322 args.access |= NFS4_ACCESS_READ;
2323 if (S_ISDIR(inode->i_mode)) {
2324 if (mode & MAY_WRITE)
2325 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2326 if (mode & MAY_EXEC)
2327 args.access |= NFS4_ACCESS_LOOKUP;
2328 } else {
2329 if (mode & MAY_WRITE)
2330 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2331 if (mode & MAY_EXEC)
2332 args.access |= NFS4_ACCESS_EXECUTE;
2333 }
2334 nfs_fattr_init(&fattr);
2335 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2336 if (!status) {
2337 entry->mask = 0;
2338 if (res.access & NFS4_ACCESS_READ)
2339 entry->mask |= MAY_READ;
2340 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2341 entry->mask |= MAY_WRITE;
2342 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2343 entry->mask |= MAY_EXEC;
2344 nfs_refresh_inode(inode, &fattr);
2345 }
2346 return status;
2347}
2348
2349static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2350{
2351 struct nfs4_exception exception = { };
2352 int err;
2353 do {
2354 err = nfs4_handle_exception(NFS_SERVER(inode),
2355 _nfs4_proc_access(inode, entry),
2356 &exception);
2357 } while (exception.retry);
2358 return err;
2359}
2360
2361/*
2362 * TODO: For the time being, we don't try to get any attributes
2363 * along with any of the zero-copy operations READ, READDIR,
2364 * READLINK, WRITE.
2365 *
2366 * In the case of the first three, we want to put the GETATTR
2367 * after the read-type operation -- this is because it is hard
2368 * to predict the length of a GETATTR response in v4, and thus
2369 * align the READ data correctly. This means that the GETATTR
2370 * may end up partially falling into the page cache, and we should
2371 * shift it into the 'tail' of the xdr_buf before processing.
2372 * To do this efficiently, we need to know the total length
2373 * of data received, which doesn't seem to be available outside
2374 * of the RPC layer.
2375 *
2376 * In the case of WRITE, we also want to put the GETATTR after
2377 * the operation -- in this case because we want to make sure
2378 * we get the post-operation mtime and size. This means that
2379 * we can't use xdr_encode_pages() as written: we need a variant
2380 * of it which would leave room in the 'tail' iovec.
2381 *
2382 * Both of these changes to the XDR layer would in fact be quite
2383 * minor, but I decided to leave them for a subsequent patch.
2384 */
2385static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2386 unsigned int pgbase, unsigned int pglen)
2387{
2388 struct nfs4_readlink args = {
2389 .fh = NFS_FH(inode),
2390 .pgbase = pgbase,
2391 .pglen = pglen,
2392 .pages = &page,
2393 };
2394 struct nfs4_readlink_res res;
2395 struct rpc_message msg = {
2396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2397 .rpc_argp = &args,
2398 .rpc_resp = &res,
2399 };
2400
2401 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2402}
2403
2404static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2405 unsigned int pgbase, unsigned int pglen)
2406{
2407 struct nfs4_exception exception = { };
2408 int err;
2409 do {
2410 err = nfs4_handle_exception(NFS_SERVER(inode),
2411 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2412 &exception);
2413 } while (exception.retry);
2414 return err;
2415}
2416
2417/*
2418 * Got race?
2419 * We will need to arrange for the VFS layer to provide an atomic open.
2420 * Until then, this create/open method is prone to inefficiency and race
2421 * conditions due to the lookup, create, and open VFS calls from sys_open()
2422 * placed on the wire.
2423 *
2424 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2425 * The file will be opened again in the subsequent VFS open call
2426 * (nfs4_proc_file_open).
2427 *
2428 * The open for read will just hang around to be used by any process that
2429 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2430 */
2431
2432static int
2433nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2434 int flags, struct nameidata *nd)
2435{
2436 struct path path = {
2437 .mnt = nd->path.mnt,
2438 .dentry = dentry,
2439 };
2440 struct nfs4_state *state;
2441 struct rpc_cred *cred;
2442 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2443 int status = 0;
2444
2445 cred = rpc_lookup_cred();
2446 if (IS_ERR(cred)) {
2447 status = PTR_ERR(cred);
2448 goto out;
2449 }
2450 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2451 d_drop(dentry);
2452 if (IS_ERR(state)) {
2453 status = PTR_ERR(state);
2454 goto out_putcred;
2455 }
2456 d_add(dentry, igrab(state->inode));
2457 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2458 if (flags & O_EXCL) {
2459 struct nfs_fattr fattr;
2460 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2461 if (status == 0)
2462 nfs_setattr_update_inode(state->inode, sattr);
2463 nfs_post_op_update_inode(state->inode, &fattr);
2464 }
2465 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2466 status = nfs4_intent_set_file(nd, &path, state, fmode);
2467 else
2468 nfs4_close_sync(&path, state, fmode);
2469out_putcred:
2470 put_rpccred(cred);
2471out:
2472 return status;
2473}
2474
2475static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2476{
2477 struct nfs_server *server = NFS_SERVER(dir);
2478 struct nfs_removeargs args = {
2479 .fh = NFS_FH(dir),
2480 .name.len = name->len,
2481 .name.name = name->name,
2482 .bitmask = server->attr_bitmask,
2483 };
2484 struct nfs_removeres res = {
2485 .server = server,
2486 };
2487 struct rpc_message msg = {
2488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2489 .rpc_argp = &args,
2490 .rpc_resp = &res,
2491 };
2492 int status;
2493
2494 nfs_fattr_init(&res.dir_attr);
2495 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2496 if (status == 0) {
2497 update_changeattr(dir, &res.cinfo);
2498 nfs_post_op_update_inode(dir, &res.dir_attr);
2499 }
2500 return status;
2501}
2502
2503static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2504{
2505 struct nfs4_exception exception = { };
2506 int err;
2507 do {
2508 err = nfs4_handle_exception(NFS_SERVER(dir),
2509 _nfs4_proc_remove(dir, name),
2510 &exception);
2511 } while (exception.retry);
2512 return err;
2513}
2514
2515static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2516{
2517 struct nfs_server *server = NFS_SERVER(dir);
2518 struct nfs_removeargs *args = msg->rpc_argp;
2519 struct nfs_removeres *res = msg->rpc_resp;
2520
2521 args->bitmask = server->cache_consistency_bitmask;
2522 res->server = server;
2523 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2524}
2525
2526static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2527{
2528 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2529
2530 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2531 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2532 return 0;
2533 update_changeattr(dir, &res->cinfo);
2534 nfs_post_op_update_inode(dir, &res->dir_attr);
2535 return 1;
2536}
2537
2538static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2539 struct inode *new_dir, struct qstr *new_name)
2540{
2541 struct nfs_server *server = NFS_SERVER(old_dir);
2542 struct nfs4_rename_arg arg = {
2543 .old_dir = NFS_FH(old_dir),
2544 .new_dir = NFS_FH(new_dir),
2545 .old_name = old_name,
2546 .new_name = new_name,
2547 .bitmask = server->attr_bitmask,
2548 };
2549 struct nfs_fattr old_fattr, new_fattr;
2550 struct nfs4_rename_res res = {
2551 .server = server,
2552 .old_fattr = &old_fattr,
2553 .new_fattr = &new_fattr,
2554 };
2555 struct rpc_message msg = {
2556 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2557 .rpc_argp = &arg,
2558 .rpc_resp = &res,
2559 };
2560 int status;
2561
2562 nfs_fattr_init(res.old_fattr);
2563 nfs_fattr_init(res.new_fattr);
2564 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2565
2566 if (!status) {
2567 update_changeattr(old_dir, &res.old_cinfo);
2568 nfs_post_op_update_inode(old_dir, res.old_fattr);
2569 update_changeattr(new_dir, &res.new_cinfo);
2570 nfs_post_op_update_inode(new_dir, res.new_fattr);
2571 }
2572 return status;
2573}
2574
2575static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2576 struct inode *new_dir, struct qstr *new_name)
2577{
2578 struct nfs4_exception exception = { };
2579 int err;
2580 do {
2581 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2582 _nfs4_proc_rename(old_dir, old_name,
2583 new_dir, new_name),
2584 &exception);
2585 } while (exception.retry);
2586 return err;
2587}
2588
2589static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2590{
2591 struct nfs_server *server = NFS_SERVER(inode);
2592 struct nfs4_link_arg arg = {
2593 .fh = NFS_FH(inode),
2594 .dir_fh = NFS_FH(dir),
2595 .name = name,
2596 .bitmask = server->attr_bitmask,
2597 };
2598 struct nfs_fattr fattr, dir_attr;
2599 struct nfs4_link_res res = {
2600 .server = server,
2601 .fattr = &fattr,
2602 .dir_attr = &dir_attr,
2603 };
2604 struct rpc_message msg = {
2605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2606 .rpc_argp = &arg,
2607 .rpc_resp = &res,
2608 };
2609 int status;
2610
2611 nfs_fattr_init(res.fattr);
2612 nfs_fattr_init(res.dir_attr);
2613 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2614 if (!status) {
2615 update_changeattr(dir, &res.cinfo);
2616 nfs_post_op_update_inode(dir, res.dir_attr);
2617 nfs_post_op_update_inode(inode, res.fattr);
2618 }
2619
2620 return status;
2621}
2622
2623static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2624{
2625 struct nfs4_exception exception = { };
2626 int err;
2627 do {
2628 err = nfs4_handle_exception(NFS_SERVER(inode),
2629 _nfs4_proc_link(inode, dir, name),
2630 &exception);
2631 } while (exception.retry);
2632 return err;
2633}
2634
2635struct nfs4_createdata {
2636 struct rpc_message msg;
2637 struct nfs4_create_arg arg;
2638 struct nfs4_create_res res;
2639 struct nfs_fh fh;
2640 struct nfs_fattr fattr;
2641 struct nfs_fattr dir_fattr;
2642};
2643
2644static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2645 struct qstr *name, struct iattr *sattr, u32 ftype)
2646{
2647 struct nfs4_createdata *data;
2648
2649 data = kzalloc(sizeof(*data), GFP_KERNEL);
2650 if (data != NULL) {
2651 struct nfs_server *server = NFS_SERVER(dir);
2652
2653 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2654 data->msg.rpc_argp = &data->arg;
2655 data->msg.rpc_resp = &data->res;
2656 data->arg.dir_fh = NFS_FH(dir);
2657 data->arg.server = server;
2658 data->arg.name = name;
2659 data->arg.attrs = sattr;
2660 data->arg.ftype = ftype;
2661 data->arg.bitmask = server->attr_bitmask;
2662 data->res.server = server;
2663 data->res.fh = &data->fh;
2664 data->res.fattr = &data->fattr;
2665 data->res.dir_fattr = &data->dir_fattr;
2666 nfs_fattr_init(data->res.fattr);
2667 nfs_fattr_init(data->res.dir_fattr);
2668 }
2669 return data;
2670}
2671
2672static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2673{
2674 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2675 &data->arg, &data->res, 1);
2676 if (status == 0) {
2677 update_changeattr(dir, &data->res.dir_cinfo);
2678 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2679 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2680 }
2681 return status;
2682}
2683
2684static void nfs4_free_createdata(struct nfs4_createdata *data)
2685{
2686 kfree(data);
2687}
2688
2689static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2690 struct page *page, unsigned int len, struct iattr *sattr)
2691{
2692 struct nfs4_createdata *data;
2693 int status = -ENAMETOOLONG;
2694
2695 if (len > NFS4_MAXPATHLEN)
2696 goto out;
2697
2698 status = -ENOMEM;
2699 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2700 if (data == NULL)
2701 goto out;
2702
2703 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2704 data->arg.u.symlink.pages = &page;
2705 data->arg.u.symlink.len = len;
2706
2707 status = nfs4_do_create(dir, dentry, data);
2708
2709 nfs4_free_createdata(data);
2710out:
2711 return status;
2712}
2713
2714static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2715 struct page *page, unsigned int len, struct iattr *sattr)
2716{
2717 struct nfs4_exception exception = { };
2718 int err;
2719 do {
2720 err = nfs4_handle_exception(NFS_SERVER(dir),
2721 _nfs4_proc_symlink(dir, dentry, page,
2722 len, sattr),
2723 &exception);
2724 } while (exception.retry);
2725 return err;
2726}
2727
2728static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2729 struct iattr *sattr)
2730{
2731 struct nfs4_createdata *data;
2732 int status = -ENOMEM;
2733
2734 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2735 if (data == NULL)
2736 goto out;
2737
2738 status = nfs4_do_create(dir, dentry, data);
2739
2740 nfs4_free_createdata(data);
2741out:
2742 return status;
2743}
2744
2745static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2746 struct iattr *sattr)
2747{
2748 struct nfs4_exception exception = { };
2749 int err;
2750 do {
2751 err = nfs4_handle_exception(NFS_SERVER(dir),
2752 _nfs4_proc_mkdir(dir, dentry, sattr),
2753 &exception);
2754 } while (exception.retry);
2755 return err;
2756}
2757
2758static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2759 u64 cookie, struct page *page, unsigned int count, int plus)
2760{
2761 struct inode *dir = dentry->d_inode;
2762 struct nfs4_readdir_arg args = {
2763 .fh = NFS_FH(dir),
2764 .pages = &page,
2765 .pgbase = 0,
2766 .count = count,
2767 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2768 };
2769 struct nfs4_readdir_res res;
2770 struct rpc_message msg = {
2771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2772 .rpc_argp = &args,
2773 .rpc_resp = &res,
2774 .rpc_cred = cred,
2775 };
2776 int status;
2777
2778 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2779 dentry->d_parent->d_name.name,
2780 dentry->d_name.name,
2781 (unsigned long long)cookie);
2782 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2783 res.pgbase = args.pgbase;
2784 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2785 if (status == 0)
2786 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2787
2788 nfs_invalidate_atime(dir);
2789
2790 dprintk("%s: returns %d\n", __func__, status);
2791 return status;
2792}
2793
2794static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2795 u64 cookie, struct page *page, unsigned int count, int plus)
2796{
2797 struct nfs4_exception exception = { };
2798 int err;
2799 do {
2800 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2801 _nfs4_proc_readdir(dentry, cred, cookie,
2802 page, count, plus),
2803 &exception);
2804 } while (exception.retry);
2805 return err;
2806}
2807
2808static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2809 struct iattr *sattr, dev_t rdev)
2810{
2811 struct nfs4_createdata *data;
2812 int mode = sattr->ia_mode;
2813 int status = -ENOMEM;
2814
2815 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2816 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2817
2818 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2819 if (data == NULL)
2820 goto out;
2821
2822 if (S_ISFIFO(mode))
2823 data->arg.ftype = NF4FIFO;
2824 else if (S_ISBLK(mode)) {
2825 data->arg.ftype = NF4BLK;
2826 data->arg.u.device.specdata1 = MAJOR(rdev);
2827 data->arg.u.device.specdata2 = MINOR(rdev);
2828 }
2829 else if (S_ISCHR(mode)) {
2830 data->arg.ftype = NF4CHR;
2831 data->arg.u.device.specdata1 = MAJOR(rdev);
2832 data->arg.u.device.specdata2 = MINOR(rdev);
2833 }
2834
2835 status = nfs4_do_create(dir, dentry, data);
2836
2837 nfs4_free_createdata(data);
2838out:
2839 return status;
2840}
2841
2842static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2843 struct iattr *sattr, dev_t rdev)
2844{
2845 struct nfs4_exception exception = { };
2846 int err;
2847 do {
2848 err = nfs4_handle_exception(NFS_SERVER(dir),
2849 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2850 &exception);
2851 } while (exception.retry);
2852 return err;
2853}
2854
2855static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2856 struct nfs_fsstat *fsstat)
2857{
2858 struct nfs4_statfs_arg args = {
2859 .fh = fhandle,
2860 .bitmask = server->attr_bitmask,
2861 };
2862 struct nfs4_statfs_res res = {
2863 .fsstat = fsstat,
2864 };
2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2867 .rpc_argp = &args,
2868 .rpc_resp = &res,
2869 };
2870
2871 nfs_fattr_init(fsstat->fattr);
2872 return nfs4_call_sync(server, &msg, &args, &res, 0);
2873}
2874
2875static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2876{
2877 struct nfs4_exception exception = { };
2878 int err;
2879 do {
2880 err = nfs4_handle_exception(server,
2881 _nfs4_proc_statfs(server, fhandle, fsstat),
2882 &exception);
2883 } while (exception.retry);
2884 return err;
2885}
2886
2887static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2888 struct nfs_fsinfo *fsinfo)
2889{
2890 struct nfs4_fsinfo_arg args = {
2891 .fh = fhandle,
2892 .bitmask = server->attr_bitmask,
2893 };
2894 struct nfs4_fsinfo_res res = {
2895 .fsinfo = fsinfo,
2896 };
2897 struct rpc_message msg = {
2898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2899 .rpc_argp = &args,
2900 .rpc_resp = &res,
2901 };
2902
2903 return nfs4_call_sync(server, &msg, &args, &res, 0);
2904}
2905
2906static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2907{
2908 struct nfs4_exception exception = { };
2909 int err;
2910
2911 do {
2912 err = nfs4_handle_exception(server,
2913 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2914 &exception);
2915 } while (exception.retry);
2916 return err;
2917}
2918
2919static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2920{
2921 nfs_fattr_init(fsinfo->fattr);
2922 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2923}
2924
2925static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2926 struct nfs_pathconf *pathconf)
2927{
2928 struct nfs4_pathconf_arg args = {
2929 .fh = fhandle,
2930 .bitmask = server->attr_bitmask,
2931 };
2932 struct nfs4_pathconf_res res = {
2933 .pathconf = pathconf,
2934 };
2935 struct rpc_message msg = {
2936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2937 .rpc_argp = &args,
2938 .rpc_resp = &res,
2939 };
2940
2941 /* None of the pathconf attributes are mandatory to implement */
2942 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2943 memset(pathconf, 0, sizeof(*pathconf));
2944 return 0;
2945 }
2946
2947 nfs_fattr_init(pathconf->fattr);
2948 return nfs4_call_sync(server, &msg, &args, &res, 0);
2949}
2950
2951static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_pathconf *pathconf)
2953{
2954 struct nfs4_exception exception = { };
2955 int err;
2956
2957 do {
2958 err = nfs4_handle_exception(server,
2959 _nfs4_proc_pathconf(server, fhandle, pathconf),
2960 &exception);
2961 } while (exception.retry);
2962 return err;
2963}
2964
2965static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2966{
2967 struct nfs_server *server = NFS_SERVER(data->inode);
2968
2969 dprintk("--> %s\n", __func__);
2970
2971 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2972
2973 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2974 nfs_restart_rpc(task, server->nfs_client);
2975 return -EAGAIN;
2976 }
2977
2978 nfs_invalidate_atime(data->inode);
2979 if (task->tk_status > 0)
2980 renew_lease(server, data->timestamp);
2981 return 0;
2982}
2983
2984static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2985{
2986 data->timestamp = jiffies;
2987 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2988}
2989
2990static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2991{
2992 struct inode *inode = data->inode;
2993
2994 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2995 task->tk_status);
2996
2997 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2998 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2999 return -EAGAIN;
3000 }
3001 if (task->tk_status >= 0) {
3002 renew_lease(NFS_SERVER(inode), data->timestamp);
3003 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3004 }
3005 return 0;
3006}
3007
3008static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3009{
3010 struct nfs_server *server = NFS_SERVER(data->inode);
3011
3012 data->args.bitmask = server->cache_consistency_bitmask;
3013 data->res.server = server;
3014 data->timestamp = jiffies;
3015
3016 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3017}
3018
3019static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3020{
3021 struct inode *inode = data->inode;
3022
3023 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3024 task->tk_status);
3025 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3026 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3027 return -EAGAIN;
3028 }
3029 nfs_refresh_inode(inode, data->res.fattr);
3030 return 0;
3031}
3032
3033static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3034{
3035 struct nfs_server *server = NFS_SERVER(data->inode);
3036
3037 data->args.bitmask = server->cache_consistency_bitmask;
3038 data->res.server = server;
3039 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3040}
3041
3042/*
3043 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3044 * standalone procedure for queueing an asynchronous RENEW.
3045 */
3046static void nfs4_renew_done(struct rpc_task *task, void *data)
3047{
3048 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3049 unsigned long timestamp = (unsigned long)data;
3050
3051 if (task->tk_status < 0) {
3052 /* Unless we're shutting down, schedule state recovery! */
3053 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3054 nfs4_schedule_state_recovery(clp);
3055 return;
3056 }
3057 spin_lock(&clp->cl_lock);
3058 if (time_before(clp->cl_last_renewal,timestamp))
3059 clp->cl_last_renewal = timestamp;
3060 spin_unlock(&clp->cl_lock);
3061}
3062
3063static const struct rpc_call_ops nfs4_renew_ops = {
3064 .rpc_call_done = nfs4_renew_done,
3065};
3066
3067int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3068{
3069 struct rpc_message msg = {
3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3071 .rpc_argp = clp,
3072 .rpc_cred = cred,
3073 };
3074
3075 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3076 &nfs4_renew_ops, (void *)jiffies);
3077}
3078
3079int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3080{
3081 struct rpc_message msg = {
3082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3083 .rpc_argp = clp,
3084 .rpc_cred = cred,
3085 };
3086 unsigned long now = jiffies;
3087 int status;
3088
3089 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3090 if (status < 0)
3091 return status;
3092 spin_lock(&clp->cl_lock);
3093 if (time_before(clp->cl_last_renewal,now))
3094 clp->cl_last_renewal = now;
3095 spin_unlock(&clp->cl_lock);
3096 return 0;
3097}
3098
3099static inline int nfs4_server_supports_acls(struct nfs_server *server)
3100{
3101 return (server->caps & NFS_CAP_ACLS)
3102 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3103 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3104}
3105
3106/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3107 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3108 * the stack.
3109 */
3110#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3111
3112static void buf_to_pages(const void *buf, size_t buflen,
3113 struct page **pages, unsigned int *pgbase)
3114{
3115 const void *p = buf;
3116
3117 *pgbase = offset_in_page(buf);
3118 p -= *pgbase;
3119 while (p < buf + buflen) {
3120 *(pages++) = virt_to_page(p);
3121 p += PAGE_CACHE_SIZE;
3122 }
3123}
3124
3125struct nfs4_cached_acl {
3126 int cached;
3127 size_t len;
3128 char data[0];
3129};
3130
3131static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3132{
3133 struct nfs_inode *nfsi = NFS_I(inode);
3134
3135 spin_lock(&inode->i_lock);
3136 kfree(nfsi->nfs4_acl);
3137 nfsi->nfs4_acl = acl;
3138 spin_unlock(&inode->i_lock);
3139}
3140
3141static void nfs4_zap_acl_attr(struct inode *inode)
3142{
3143 nfs4_set_cached_acl(inode, NULL);
3144}
3145
3146static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3147{
3148 struct nfs_inode *nfsi = NFS_I(inode);
3149 struct nfs4_cached_acl *acl;
3150 int ret = -ENOENT;
3151
3152 spin_lock(&inode->i_lock);
3153 acl = nfsi->nfs4_acl;
3154 if (acl == NULL)
3155 goto out;
3156 if (buf == NULL) /* user is just asking for length */
3157 goto out_len;
3158 if (acl->cached == 0)
3159 goto out;
3160 ret = -ERANGE; /* see getxattr(2) man page */
3161 if (acl->len > buflen)
3162 goto out;
3163 memcpy(buf, acl->data, acl->len);
3164out_len:
3165 ret = acl->len;
3166out:
3167 spin_unlock(&inode->i_lock);
3168 return ret;
3169}
3170
3171static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3172{
3173 struct nfs4_cached_acl *acl;
3174
3175 if (buf && acl_len <= PAGE_SIZE) {
3176 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3177 if (acl == NULL)
3178 goto out;
3179 acl->cached = 1;
3180 memcpy(acl->data, buf, acl_len);
3181 } else {
3182 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3183 if (acl == NULL)
3184 goto out;
3185 acl->cached = 0;
3186 }
3187 acl->len = acl_len;
3188out:
3189 nfs4_set_cached_acl(inode, acl);
3190}
3191
3192static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3193{
3194 struct page *pages[NFS4ACL_MAXPAGES];
3195 struct nfs_getaclargs args = {
3196 .fh = NFS_FH(inode),
3197 .acl_pages = pages,
3198 .acl_len = buflen,
3199 };
3200 struct nfs_getaclres res = {
3201 .acl_len = buflen,
3202 };
3203 void *resp_buf;
3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3206 .rpc_argp = &args,
3207 .rpc_resp = &res,
3208 };
3209 struct page *localpage = NULL;
3210 int ret;
3211
3212 if (buflen < PAGE_SIZE) {
3213 /* As long as we're doing a round trip to the server anyway,
3214 * let's be prepared for a page of acl data. */
3215 localpage = alloc_page(GFP_KERNEL);
3216 resp_buf = page_address(localpage);
3217 if (localpage == NULL)
3218 return -ENOMEM;
3219 args.acl_pages[0] = localpage;
3220 args.acl_pgbase = 0;
3221 args.acl_len = PAGE_SIZE;
3222 } else {
3223 resp_buf = buf;
3224 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3225 }
3226 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3227 if (ret)
3228 goto out_free;
3229 if (res.acl_len > args.acl_len)
3230 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3231 else
3232 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3233 if (buf) {
3234 ret = -ERANGE;
3235 if (res.acl_len > buflen)
3236 goto out_free;
3237 if (localpage)
3238 memcpy(buf, resp_buf, res.acl_len);
3239 }
3240 ret = res.acl_len;
3241out_free:
3242 if (localpage)
3243 __free_page(localpage);
3244 return ret;
3245}
3246
3247static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3248{
3249 struct nfs4_exception exception = { };
3250 ssize_t ret;
3251 do {
3252 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3253 if (ret >= 0)
3254 break;
3255 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3256 } while (exception.retry);
3257 return ret;
3258}
3259
3260static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3261{
3262 struct nfs_server *server = NFS_SERVER(inode);
3263 int ret;
3264
3265 if (!nfs4_server_supports_acls(server))
3266 return -EOPNOTSUPP;
3267 ret = nfs_revalidate_inode(server, inode);
3268 if (ret < 0)
3269 return ret;
3270 ret = nfs4_read_cached_acl(inode, buf, buflen);
3271 if (ret != -ENOENT)
3272 return ret;
3273 return nfs4_get_acl_uncached(inode, buf, buflen);
3274}
3275
3276static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3277{
3278 struct nfs_server *server = NFS_SERVER(inode);
3279 struct page *pages[NFS4ACL_MAXPAGES];
3280 struct nfs_setaclargs arg = {
3281 .fh = NFS_FH(inode),
3282 .acl_pages = pages,
3283 .acl_len = buflen,
3284 };
3285 struct nfs_setaclres res;
3286 struct rpc_message msg = {
3287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3288 .rpc_argp = &arg,
3289 .rpc_resp = &res,
3290 };
3291 int ret;
3292
3293 if (!nfs4_server_supports_acls(server))
3294 return -EOPNOTSUPP;
3295 nfs_inode_return_delegation(inode);
3296 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3297 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3298 nfs_access_zap_cache(inode);
3299 nfs_zap_acl_cache(inode);
3300 return ret;
3301}
3302
3303static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3304{
3305 struct nfs4_exception exception = { };
3306 int err;
3307 do {
3308 err = nfs4_handle_exception(NFS_SERVER(inode),
3309 __nfs4_proc_set_acl(inode, buf, buflen),
3310 &exception);
3311 } while (exception.retry);
3312 return err;
3313}
3314
3315static int
3316_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3317{
3318 if (!clp || task->tk_status >= 0)
3319 return 0;
3320 switch(task->tk_status) {
3321 case -NFS4ERR_ADMIN_REVOKED:
3322 case -NFS4ERR_BAD_STATEID:
3323 case -NFS4ERR_OPENMODE:
3324 if (state == NULL)
3325 break;
3326 nfs4_state_mark_reclaim_nograce(clp, state);
3327 case -NFS4ERR_STALE_CLIENTID:
3328 case -NFS4ERR_STALE_STATEID:
3329 case -NFS4ERR_EXPIRED:
3330 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3331 nfs4_schedule_state_recovery(clp);
3332 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3333 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3334 task->tk_status = 0;
3335 return -EAGAIN;
3336#if defined(CONFIG_NFS_V4_1)
3337 case -NFS4ERR_BADSESSION:
3338 case -NFS4ERR_BADSLOT:
3339 case -NFS4ERR_BAD_HIGH_SLOT:
3340 case -NFS4ERR_DEADSESSION:
3341 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3342 case -NFS4ERR_SEQ_FALSE_RETRY:
3343 case -NFS4ERR_SEQ_MISORDERED:
3344 dprintk("%s ERROR %d, Reset session\n", __func__,
3345 task->tk_status);
3346 nfs4_schedule_state_recovery(clp);
3347 task->tk_status = 0;
3348 return -EAGAIN;
3349#endif /* CONFIG_NFS_V4_1 */
3350 case -NFS4ERR_DELAY:
3351 if (server)
3352 nfs_inc_server_stats(server, NFSIOS_DELAY);
3353 case -NFS4ERR_GRACE:
3354 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3355 task->tk_status = 0;
3356 return -EAGAIN;
3357 case -NFS4ERR_OLD_STATEID:
3358 task->tk_status = 0;
3359 return -EAGAIN;
3360 }
3361 task->tk_status = nfs4_map_errors(task->tk_status);
3362 return 0;
3363}
3364
3365static int
3366nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3367{
3368 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3369}
3370
3371int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3372{
3373 nfs4_verifier sc_verifier;
3374 struct nfs4_setclientid setclientid = {
3375 .sc_verifier = &sc_verifier,
3376 .sc_prog = program,
3377 };
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3380 .rpc_argp = &setclientid,
3381 .rpc_resp = clp,
3382 .rpc_cred = cred,
3383 };
3384 __be32 *p;
3385 int loop = 0;
3386 int status;
3387
3388 p = (__be32*)sc_verifier.data;
3389 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3390 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3391
3392 for(;;) {
3393 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3394 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3395 clp->cl_ipaddr,
3396 rpc_peeraddr2str(clp->cl_rpcclient,
3397 RPC_DISPLAY_ADDR),
3398 rpc_peeraddr2str(clp->cl_rpcclient,
3399 RPC_DISPLAY_PROTO),
3400 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3401 clp->cl_id_uniquifier);
3402 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3403 sizeof(setclientid.sc_netid),
3404 rpc_peeraddr2str(clp->cl_rpcclient,
3405 RPC_DISPLAY_NETID));
3406 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3407 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3408 clp->cl_ipaddr, port >> 8, port & 255);
3409
3410 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3411 if (status != -NFS4ERR_CLID_INUSE)
3412 break;
3413 if (signalled())
3414 break;
3415 if (loop++ & 1)
3416 ssleep(clp->cl_lease_time + 1);
3417 else
3418 if (++clp->cl_id_uniquifier == 0)
3419 break;
3420 }
3421 return status;
3422}
3423
3424static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3425{
3426 struct nfs_fsinfo fsinfo;
3427 struct rpc_message msg = {
3428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3429 .rpc_argp = clp,
3430 .rpc_resp = &fsinfo,
3431 .rpc_cred = cred,
3432 };
3433 unsigned long now;
3434 int status;
3435
3436 now = jiffies;
3437 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3438 if (status == 0) {
3439 spin_lock(&clp->cl_lock);
3440 clp->cl_lease_time = fsinfo.lease_time * HZ;
3441 clp->cl_last_renewal = now;
3442 spin_unlock(&clp->cl_lock);
3443 }
3444 return status;
3445}
3446
3447int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3448{
3449 long timeout = 0;
3450 int err;
3451 do {
3452 err = _nfs4_proc_setclientid_confirm(clp, cred);
3453 switch (err) {
3454 case 0:
3455 return err;
3456 case -NFS4ERR_RESOURCE:
3457 /* The IBM lawyers misread another document! */
3458 case -NFS4ERR_DELAY:
3459 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3460 }
3461 } while (err == 0);
3462 return err;
3463}
3464
3465struct nfs4_delegreturndata {
3466 struct nfs4_delegreturnargs args;
3467 struct nfs4_delegreturnres res;
3468 struct nfs_fh fh;
3469 nfs4_stateid stateid;
3470 unsigned long timestamp;
3471 struct nfs_fattr fattr;
3472 int rpc_status;
3473};
3474
3475static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3476{
3477 struct nfs4_delegreturndata *data = calldata;
3478
3479 nfs4_sequence_done(data->res.server, &data->res.seq_res,
3480 task->tk_status);
3481
3482 data->rpc_status = task->tk_status;
3483 if (data->rpc_status == 0)
3484 renew_lease(data->res.server, data->timestamp);
3485}
3486
3487static void nfs4_delegreturn_release(void *calldata)
3488{
3489 kfree(calldata);
3490}
3491
3492#if defined(CONFIG_NFS_V4_1)
3493static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3494{
3495 struct nfs4_delegreturndata *d_data;
3496
3497 d_data = (struct nfs4_delegreturndata *)data;
3498
3499 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3500 &d_data->args.seq_args,
3501 &d_data->res.seq_res, 1, task))
3502 return;
3503 rpc_call_start(task);
3504}
3505#endif /* CONFIG_NFS_V4_1 */
3506
3507static const struct rpc_call_ops nfs4_delegreturn_ops = {
3508#if defined(CONFIG_NFS_V4_1)
3509 .rpc_call_prepare = nfs4_delegreturn_prepare,
3510#endif /* CONFIG_NFS_V4_1 */
3511 .rpc_call_done = nfs4_delegreturn_done,
3512 .rpc_release = nfs4_delegreturn_release,
3513};
3514
3515static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3516{
3517 struct nfs4_delegreturndata *data;
3518 struct nfs_server *server = NFS_SERVER(inode);
3519 struct rpc_task *task;
3520 struct rpc_message msg = {
3521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3522 .rpc_cred = cred,
3523 };
3524 struct rpc_task_setup task_setup_data = {
3525 .rpc_client = server->client,
3526 .rpc_message = &msg,
3527 .callback_ops = &nfs4_delegreturn_ops,
3528 .flags = RPC_TASK_ASYNC,
3529 };
3530 int status = 0;
3531
3532 data = kzalloc(sizeof(*data), GFP_KERNEL);
3533 if (data == NULL)
3534 return -ENOMEM;
3535 data->args.fhandle = &data->fh;
3536 data->args.stateid = &data->stateid;
3537 data->args.bitmask = server->attr_bitmask;
3538 nfs_copy_fh(&data->fh, NFS_FH(inode));
3539 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3540 data->res.fattr = &data->fattr;
3541 data->res.server = server;
3542 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3543 nfs_fattr_init(data->res.fattr);
3544 data->timestamp = jiffies;
3545 data->rpc_status = 0;
3546
3547 task_setup_data.callback_data = data;
3548 msg.rpc_argp = &data->args,
3549 msg.rpc_resp = &data->res,
3550 task = rpc_run_task(&task_setup_data);
3551 if (IS_ERR(task))
3552 return PTR_ERR(task);
3553 if (!issync)
3554 goto out;
3555 status = nfs4_wait_for_completion_rpc_task(task);
3556 if (status != 0)
3557 goto out;
3558 status = data->rpc_status;
3559 if (status != 0)
3560 goto out;
3561 nfs_refresh_inode(inode, &data->fattr);
3562out:
3563 rpc_put_task(task);
3564 return status;
3565}
3566
3567int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3568{
3569 struct nfs_server *server = NFS_SERVER(inode);
3570 struct nfs4_exception exception = { };
3571 int err;
3572 do {
3573 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3574 switch (err) {
3575 case -NFS4ERR_STALE_STATEID:
3576 case -NFS4ERR_EXPIRED:
3577 case 0:
3578 return 0;
3579 }
3580 err = nfs4_handle_exception(server, err, &exception);
3581 } while (exception.retry);
3582 return err;
3583}
3584
3585#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3586#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3587
3588/*
3589 * sleep, with exponential backoff, and retry the LOCK operation.
3590 */
3591static unsigned long
3592nfs4_set_lock_task_retry(unsigned long timeout)
3593{
3594 schedule_timeout_killable(timeout);
3595 timeout <<= 1;
3596 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3597 return NFS4_LOCK_MAXTIMEOUT;
3598 return timeout;
3599}
3600
3601static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3602{
3603 struct inode *inode = state->inode;
3604 struct nfs_server *server = NFS_SERVER(inode);
3605 struct nfs_client *clp = server->nfs_client;
3606 struct nfs_lockt_args arg = {
3607 .fh = NFS_FH(inode),
3608 .fl = request,
3609 };
3610 struct nfs_lockt_res res = {
3611 .denied = request,
3612 };
3613 struct rpc_message msg = {
3614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3615 .rpc_argp = &arg,
3616 .rpc_resp = &res,
3617 .rpc_cred = state->owner->so_cred,
3618 };
3619 struct nfs4_lock_state *lsp;
3620 int status;
3621
3622 arg.lock_owner.clientid = clp->cl_clientid;
3623 status = nfs4_set_lock_state(state, request);
3624 if (status != 0)
3625 goto out;
3626 lsp = request->fl_u.nfs4_fl.owner;
3627 arg.lock_owner.id = lsp->ls_id.id;
3628 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3629 switch (status) {
3630 case 0:
3631 request->fl_type = F_UNLCK;
3632 break;
3633 case -NFS4ERR_DENIED:
3634 status = 0;
3635 }
3636 request->fl_ops->fl_release_private(request);
3637out:
3638 return status;
3639}
3640
3641static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3642{
3643 struct nfs4_exception exception = { };
3644 int err;
3645
3646 do {
3647 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3648 _nfs4_proc_getlk(state, cmd, request),
3649 &exception);
3650 } while (exception.retry);
3651 return err;
3652}
3653
3654static int do_vfs_lock(struct file *file, struct file_lock *fl)
3655{
3656 int res = 0;
3657 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3658 case FL_POSIX:
3659 res = posix_lock_file_wait(file, fl);
3660 break;
3661 case FL_FLOCK:
3662 res = flock_lock_file_wait(file, fl);
3663 break;
3664 default:
3665 BUG();
3666 }
3667 return res;
3668}
3669
3670struct nfs4_unlockdata {
3671 struct nfs_locku_args arg;
3672 struct nfs_locku_res res;
3673 struct nfs4_lock_state *lsp;
3674 struct nfs_open_context *ctx;
3675 struct file_lock fl;
3676 const struct nfs_server *server;
3677 unsigned long timestamp;
3678};
3679
3680static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3681 struct nfs_open_context *ctx,
3682 struct nfs4_lock_state *lsp,
3683 struct nfs_seqid *seqid)
3684{
3685 struct nfs4_unlockdata *p;
3686 struct inode *inode = lsp->ls_state->inode;
3687
3688 p = kzalloc(sizeof(*p), GFP_KERNEL);
3689 if (p == NULL)
3690 return NULL;
3691 p->arg.fh = NFS_FH(inode);
3692 p->arg.fl = &p->fl;
3693 p->arg.seqid = seqid;
3694 p->res.seqid = seqid;
3695 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3696 p->arg.stateid = &lsp->ls_stateid;
3697 p->lsp = lsp;
3698 atomic_inc(&lsp->ls_count);
3699 /* Ensure we don't close file until we're done freeing locks! */
3700 p->ctx = get_nfs_open_context(ctx);
3701 memcpy(&p->fl, fl, sizeof(p->fl));
3702 p->server = NFS_SERVER(inode);
3703 return p;
3704}
3705
3706static void nfs4_locku_release_calldata(void *data)
3707{
3708 struct nfs4_unlockdata *calldata = data;
3709 nfs_free_seqid(calldata->arg.seqid);
3710 nfs4_put_lock_state(calldata->lsp);
3711 put_nfs_open_context(calldata->ctx);
3712 kfree(calldata);
3713}
3714
3715static void nfs4_locku_done(struct rpc_task *task, void *data)
3716{
3717 struct nfs4_unlockdata *calldata = data;
3718
3719 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3720 task->tk_status);
3721 if (RPC_ASSASSINATED(task))
3722 return;
3723 switch (task->tk_status) {
3724 case 0:
3725 memcpy(calldata->lsp->ls_stateid.data,
3726 calldata->res.stateid.data,
3727 sizeof(calldata->lsp->ls_stateid.data));
3728 renew_lease(calldata->server, calldata->timestamp);
3729 break;
3730 case -NFS4ERR_BAD_STATEID:
3731 case -NFS4ERR_OLD_STATEID:
3732 case -NFS4ERR_STALE_STATEID:
3733 case -NFS4ERR_EXPIRED:
3734 break;
3735 default:
3736 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3737 nfs_restart_rpc(task,
3738 calldata->server->nfs_client);
3739 }
3740}
3741
3742static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3743{
3744 struct nfs4_unlockdata *calldata = data;
3745
3746 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3747 return;
3748 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3749 /* Note: exit _without_ running nfs4_locku_done */
3750 task->tk_action = NULL;
3751 return;
3752 }
3753 calldata->timestamp = jiffies;
3754 if (nfs4_setup_sequence(calldata->server->nfs_client,
3755 &calldata->arg.seq_args,
3756 &calldata->res.seq_res, 1, task))
3757 return;
3758 rpc_call_start(task);
3759}
3760
3761static const struct rpc_call_ops nfs4_locku_ops = {
3762 .rpc_call_prepare = nfs4_locku_prepare,
3763 .rpc_call_done = nfs4_locku_done,
3764 .rpc_release = nfs4_locku_release_calldata,
3765};
3766
3767static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3768 struct nfs_open_context *ctx,
3769 struct nfs4_lock_state *lsp,
3770 struct nfs_seqid *seqid)
3771{
3772 struct nfs4_unlockdata *data;
3773 struct rpc_message msg = {
3774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3775 .rpc_cred = ctx->cred,
3776 };
3777 struct rpc_task_setup task_setup_data = {
3778 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3779 .rpc_message = &msg,
3780 .callback_ops = &nfs4_locku_ops,
3781 .workqueue = nfsiod_workqueue,
3782 .flags = RPC_TASK_ASYNC,
3783 };
3784
3785 /* Ensure this is an unlock - when canceling a lock, the
3786 * canceled lock is passed in, and it won't be an unlock.
3787 */
3788 fl->fl_type = F_UNLCK;
3789
3790 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3791 if (data == NULL) {
3792 nfs_free_seqid(seqid);
3793 return ERR_PTR(-ENOMEM);
3794 }
3795
3796 msg.rpc_argp = &data->arg,
3797 msg.rpc_resp = &data->res,
3798 task_setup_data.callback_data = data;
3799 return rpc_run_task(&task_setup_data);
3800}
3801
3802static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3803{
3804 struct nfs_inode *nfsi = NFS_I(state->inode);
3805 struct nfs_seqid *seqid;
3806 struct nfs4_lock_state *lsp;
3807 struct rpc_task *task;
3808 int status = 0;
3809 unsigned char fl_flags = request->fl_flags;
3810
3811 status = nfs4_set_lock_state(state, request);
3812 /* Unlock _before_ we do the RPC call */
3813 request->fl_flags |= FL_EXISTS;
3814 down_read(&nfsi->rwsem);
3815 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3816 up_read(&nfsi->rwsem);
3817 goto out;
3818 }
3819 up_read(&nfsi->rwsem);
3820 if (status != 0)
3821 goto out;
3822 /* Is this a delegated lock? */
3823 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3824 goto out;
3825 lsp = request->fl_u.nfs4_fl.owner;
3826 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3827 status = -ENOMEM;
3828 if (seqid == NULL)
3829 goto out;
3830 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3831 status = PTR_ERR(task);
3832 if (IS_ERR(task))
3833 goto out;
3834 status = nfs4_wait_for_completion_rpc_task(task);
3835 rpc_put_task(task);
3836out:
3837 request->fl_flags = fl_flags;
3838 return status;
3839}
3840
3841struct nfs4_lockdata {
3842 struct nfs_lock_args arg;
3843 struct nfs_lock_res res;
3844 struct nfs4_lock_state *lsp;
3845 struct nfs_open_context *ctx;
3846 struct file_lock fl;
3847 unsigned long timestamp;
3848 int rpc_status;
3849 int cancelled;
3850 struct nfs_server *server;
3851};
3852
3853static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3854 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3855{
3856 struct nfs4_lockdata *p;
3857 struct inode *inode = lsp->ls_state->inode;
3858 struct nfs_server *server = NFS_SERVER(inode);
3859
3860 p = kzalloc(sizeof(*p), GFP_KERNEL);
3861 if (p == NULL)
3862 return NULL;
3863
3864 p->arg.fh = NFS_FH(inode);
3865 p->arg.fl = &p->fl;
3866 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3867 if (p->arg.open_seqid == NULL)
3868 goto out_free;
3869 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3870 if (p->arg.lock_seqid == NULL)
3871 goto out_free_seqid;
3872 p->arg.lock_stateid = &lsp->ls_stateid;
3873 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3874 p->arg.lock_owner.id = lsp->ls_id.id;
3875 p->res.lock_seqid = p->arg.lock_seqid;
3876 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3877 p->lsp = lsp;
3878 p->server = server;
3879 atomic_inc(&lsp->ls_count);
3880 p->ctx = get_nfs_open_context(ctx);
3881 memcpy(&p->fl, fl, sizeof(p->fl));
3882 return p;
3883out_free_seqid:
3884 nfs_free_seqid(p->arg.open_seqid);
3885out_free:
3886 kfree(p);
3887 return NULL;
3888}
3889
3890static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3891{
3892 struct nfs4_lockdata *data = calldata;
3893 struct nfs4_state *state = data->lsp->ls_state;
3894
3895 dprintk("%s: begin!\n", __func__);
3896 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3897 return;
3898 /* Do we need to do an open_to_lock_owner? */
3899 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3900 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3901 return;
3902 data->arg.open_stateid = &state->stateid;
3903 data->arg.new_lock_owner = 1;
3904 data->res.open_seqid = data->arg.open_seqid;
3905 } else
3906 data->arg.new_lock_owner = 0;
3907 data->timestamp = jiffies;
3908 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3909 &data->res.seq_res, 1, task))
3910 return;
3911 rpc_call_start(task);
3912 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3913}
3914
3915static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3916{
3917 struct nfs4_lockdata *data = calldata;
3918
3919 dprintk("%s: begin!\n", __func__);
3920
3921 nfs4_sequence_done(data->server, &data->res.seq_res,
3922 task->tk_status);
3923
3924 data->rpc_status = task->tk_status;
3925 if (RPC_ASSASSINATED(task))
3926 goto out;
3927 if (data->arg.new_lock_owner != 0) {
3928 if (data->rpc_status == 0)
3929 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3930 else
3931 goto out;
3932 }
3933 if (data->rpc_status == 0) {
3934 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3935 sizeof(data->lsp->ls_stateid.data));
3936 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3937 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3938 }
3939out:
3940 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3941}
3942
3943static void nfs4_lock_release(void *calldata)
3944{
3945 struct nfs4_lockdata *data = calldata;
3946
3947 dprintk("%s: begin!\n", __func__);
3948 nfs_free_seqid(data->arg.open_seqid);
3949 if (data->cancelled != 0) {
3950 struct rpc_task *task;
3951 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3952 data->arg.lock_seqid);
3953 if (!IS_ERR(task))
3954 rpc_put_task(task);
3955 dprintk("%s: cancelling lock!\n", __func__);
3956 } else
3957 nfs_free_seqid(data->arg.lock_seqid);
3958 nfs4_put_lock_state(data->lsp);
3959 put_nfs_open_context(data->ctx);
3960 kfree(data);
3961 dprintk("%s: done!\n", __func__);
3962}
3963
3964static const struct rpc_call_ops nfs4_lock_ops = {
3965 .rpc_call_prepare = nfs4_lock_prepare,
3966 .rpc_call_done = nfs4_lock_done,
3967 .rpc_release = nfs4_lock_release,
3968};
3969
3970static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3971{
3972 struct nfs4_lockdata *data;
3973 struct rpc_task *task;
3974 struct rpc_message msg = {
3975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3976 .rpc_cred = state->owner->so_cred,
3977 };
3978 struct rpc_task_setup task_setup_data = {
3979 .rpc_client = NFS_CLIENT(state->inode),
3980 .rpc_message = &msg,
3981 .callback_ops = &nfs4_lock_ops,
3982 .workqueue = nfsiod_workqueue,
3983 .flags = RPC_TASK_ASYNC,
3984 };
3985 int ret;
3986
3987 dprintk("%s: begin!\n", __func__);
3988 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3989 fl->fl_u.nfs4_fl.owner);
3990 if (data == NULL)
3991 return -ENOMEM;
3992 if (IS_SETLKW(cmd))
3993 data->arg.block = 1;
3994 if (reclaim != 0)
3995 data->arg.reclaim = 1;
3996 msg.rpc_argp = &data->arg,
3997 msg.rpc_resp = &data->res,
3998 task_setup_data.callback_data = data;
3999 task = rpc_run_task(&task_setup_data);
4000 if (IS_ERR(task))
4001 return PTR_ERR(task);
4002 ret = nfs4_wait_for_completion_rpc_task(task);
4003 if (ret == 0) {
4004 ret = data->rpc_status;
4005 } else
4006 data->cancelled = 1;
4007 rpc_put_task(task);
4008 dprintk("%s: done, ret = %d!\n", __func__, ret);
4009 return ret;
4010}
4011
4012static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4013{
4014 struct nfs_server *server = NFS_SERVER(state->inode);
4015 struct nfs4_exception exception = { };
4016 int err;
4017
4018 do {
4019 /* Cache the lock if possible... */
4020 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4021 return 0;
4022 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4023 if (err != -NFS4ERR_DELAY)
4024 break;
4025 nfs4_handle_exception(server, err, &exception);
4026 } while (exception.retry);
4027 return err;
4028}
4029
4030static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4031{
4032 struct nfs_server *server = NFS_SERVER(state->inode);
4033 struct nfs4_exception exception = { };
4034 int err;
4035
4036 err = nfs4_set_lock_state(state, request);
4037 if (err != 0)
4038 return err;
4039 do {
4040 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4041 return 0;
4042 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4043 switch (err) {
4044 default:
4045 goto out;
4046 case -NFS4ERR_GRACE:
4047 case -NFS4ERR_DELAY:
4048 nfs4_handle_exception(server, err, &exception);
4049 err = 0;
4050 }
4051 } while (exception.retry);
4052out:
4053 return err;
4054}
4055
4056static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4057{
4058 struct nfs_inode *nfsi = NFS_I(state->inode);
4059 unsigned char fl_flags = request->fl_flags;
4060 int status;
4061
4062 /* Is this a delegated open? */
4063 status = nfs4_set_lock_state(state, request);
4064 if (status != 0)
4065 goto out;
4066 request->fl_flags |= FL_ACCESS;
4067 status = do_vfs_lock(request->fl_file, request);
4068 if (status < 0)
4069 goto out;
4070 down_read(&nfsi->rwsem);
4071 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4072 /* Yes: cache locks! */
4073 /* ...but avoid races with delegation recall... */
4074 request->fl_flags = fl_flags & ~FL_SLEEP;
4075 status = do_vfs_lock(request->fl_file, request);
4076 goto out_unlock;
4077 }
4078 status = _nfs4_do_setlk(state, cmd, request, 0);
4079 if (status != 0)
4080 goto out_unlock;
4081 /* Note: we always want to sleep here! */
4082 request->fl_flags = fl_flags | FL_SLEEP;
4083 if (do_vfs_lock(request->fl_file, request) < 0)
4084 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4085out_unlock:
4086 up_read(&nfsi->rwsem);
4087out:
4088 request->fl_flags = fl_flags;
4089 return status;
4090}
4091
4092static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4093{
4094 struct nfs4_exception exception = { };
4095 int err;
4096
4097 do {
4098 err = _nfs4_proc_setlk(state, cmd, request);
4099 if (err == -NFS4ERR_DENIED)
4100 err = -EAGAIN;
4101 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4102 err, &exception);
4103 } while (exception.retry);
4104 return err;
4105}
4106
4107static int
4108nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4109{
4110 struct nfs_open_context *ctx;
4111 struct nfs4_state *state;
4112 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4113 int status;
4114
4115 /* verify open state */
4116 ctx = nfs_file_open_context(filp);
4117 state = ctx->state;
4118
4119 if (request->fl_start < 0 || request->fl_end < 0)
4120 return -EINVAL;
4121
4122 if (IS_GETLK(cmd)) {
4123 if (state != NULL)
4124 return nfs4_proc_getlk(state, F_GETLK, request);
4125 return 0;
4126 }
4127
4128 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4129 return -EINVAL;
4130
4131 if (request->fl_type == F_UNLCK) {
4132 if (state != NULL)
4133 return nfs4_proc_unlck(state, cmd, request);
4134 return 0;
4135 }
4136
4137 if (state == NULL)
4138 return -ENOLCK;
4139 do {
4140 status = nfs4_proc_setlk(state, cmd, request);
4141 if ((status != -EAGAIN) || IS_SETLK(cmd))
4142 break;
4143 timeout = nfs4_set_lock_task_retry(timeout);
4144 status = -ERESTARTSYS;
4145 if (signalled())
4146 break;
4147 } while(status < 0);
4148 return status;
4149}
4150
4151int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4152{
4153 struct nfs_server *server = NFS_SERVER(state->inode);
4154 struct nfs4_exception exception = { };
4155 int err;
4156
4157 err = nfs4_set_lock_state(state, fl);
4158 if (err != 0)
4159 goto out;
4160 do {
4161 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4162 switch (err) {
4163 default:
4164 printk(KERN_ERR "%s: unhandled error %d.\n",
4165 __func__, err);
4166 case 0:
4167 case -ESTALE:
4168 goto out;
4169 case -NFS4ERR_EXPIRED:
4170 case -NFS4ERR_STALE_CLIENTID:
4171 case -NFS4ERR_STALE_STATEID:
4172 nfs4_schedule_state_recovery(server->nfs_client);
4173 goto out;
4174 case -ERESTARTSYS:
4175 /*
4176 * The show must go on: exit, but mark the
4177 * stateid as needing recovery.
4178 */
4179 case -NFS4ERR_ADMIN_REVOKED:
4180 case -NFS4ERR_BAD_STATEID:
4181 case -NFS4ERR_OPENMODE:
4182 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4183 err = 0;
4184 goto out;
4185 case -ENOMEM:
4186 case -NFS4ERR_DENIED:
4187 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4188 err = 0;
4189 goto out;
4190 case -NFS4ERR_DELAY:
4191 break;
4192 }
4193 err = nfs4_handle_exception(server, err, &exception);
4194 } while (exception.retry);
4195out:
4196 return err;
4197}
4198
4199#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4200
4201int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4202 size_t buflen, int flags)
4203{
4204 struct inode *inode = dentry->d_inode;
4205
4206 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4207 return -EOPNOTSUPP;
4208
4209 return nfs4_proc_set_acl(inode, buf, buflen);
4210}
4211
4212/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4213 * and that's what we'll do for e.g. user attributes that haven't been set.
4214 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4215 * attributes in kernel-managed attribute namespaces. */
4216ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4217 size_t buflen)
4218{
4219 struct inode *inode = dentry->d_inode;
4220
4221 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4222 return -EOPNOTSUPP;
4223
4224 return nfs4_proc_get_acl(inode, buf, buflen);
4225}
4226
4227ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4228{
4229 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4230
4231 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4232 return 0;
4233 if (buf && buflen < len)
4234 return -ERANGE;
4235 if (buf)
4236 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4237 return len;
4238}
4239
4240static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4241{
4242 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4243 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4244 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4245 return;
4246
4247 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4248 NFS_ATTR_FATTR_NLINK;
4249 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4250 fattr->nlink = 2;
4251}
4252
4253int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4254 struct nfs4_fs_locations *fs_locations, struct page *page)
4255{
4256 struct nfs_server *server = NFS_SERVER(dir);
4257 u32 bitmask[2] = {
4258 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4259 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4260 };
4261 struct nfs4_fs_locations_arg args = {
4262 .dir_fh = NFS_FH(dir),
4263 .name = name,
4264 .page = page,
4265 .bitmask = bitmask,
4266 };
4267 struct nfs4_fs_locations_res res = {
4268 .fs_locations = fs_locations,
4269 };
4270 struct rpc_message msg = {
4271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4272 .rpc_argp = &args,
4273 .rpc_resp = &res,
4274 };
4275 int status;
4276
4277 dprintk("%s: start\n", __func__);
4278 nfs_fattr_init(&fs_locations->fattr);
4279 fs_locations->server = server;
4280 fs_locations->nlocations = 0;
4281 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4282 nfs_fixup_referral_attributes(&fs_locations->fattr);
4283 dprintk("%s: returned status = %d\n", __func__, status);
4284 return status;
4285}
4286
4287#ifdef CONFIG_NFS_V4_1
4288/*
4289 * nfs4_proc_exchange_id()
4290 *
4291 * Since the clientid has expired, all compounds using sessions
4292 * associated with the stale clientid will be returning
4293 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4294 * be in some phase of session reset.
4295 */
4296int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4297{
4298 nfs4_verifier verifier;
4299 struct nfs41_exchange_id_args args = {
4300 .client = clp,
4301 .flags = clp->cl_exchange_flags,
4302 };
4303 struct nfs41_exchange_id_res res = {
4304 .client = clp,
4305 };
4306 int status;
4307 struct rpc_message msg = {
4308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4309 .rpc_argp = &args,
4310 .rpc_resp = &res,
4311 .rpc_cred = cred,
4312 };
4313 __be32 *p;
4314
4315 dprintk("--> %s\n", __func__);
4316 BUG_ON(clp == NULL);
4317
4318 /* Remove server-only flags */
4319 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4320
4321 p = (u32 *)verifier.data;
4322 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4323 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4324 args.verifier = &verifier;
4325
4326 while (1) {
4327 args.id_len = scnprintf(args.id, sizeof(args.id),
4328 "%s/%s %u",
4329 clp->cl_ipaddr,
4330 rpc_peeraddr2str(clp->cl_rpcclient,
4331 RPC_DISPLAY_ADDR),
4332 clp->cl_id_uniquifier);
4333
4334 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4335
4336 if (status != NFS4ERR_CLID_INUSE)
4337 break;
4338
4339 if (signalled())
4340 break;
4341
4342 if (++clp->cl_id_uniquifier == 0)
4343 break;
4344 }
4345
4346 dprintk("<-- %s status= %d\n", __func__, status);
4347 return status;
4348}
4349
4350struct nfs4_get_lease_time_data {
4351 struct nfs4_get_lease_time_args *args;
4352 struct nfs4_get_lease_time_res *res;
4353 struct nfs_client *clp;
4354};
4355
4356static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4357 void *calldata)
4358{
4359 int ret;
4360 struct nfs4_get_lease_time_data *data =
4361 (struct nfs4_get_lease_time_data *)calldata;
4362
4363 dprintk("--> %s\n", __func__);
4364 /* just setup sequence, do not trigger session recovery
4365 since we're invoked within one */
4366 ret = nfs41_setup_sequence(data->clp->cl_session,
4367 &data->args->la_seq_args,
4368 &data->res->lr_seq_res, 0, task);
4369
4370 BUG_ON(ret == -EAGAIN);
4371 rpc_call_start(task);
4372 dprintk("<-- %s\n", __func__);
4373}
4374
4375/*
4376 * Called from nfs4_state_manager thread for session setup, so don't recover
4377 * from sequence operation or clientid errors.
4378 */
4379static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4380{
4381 struct nfs4_get_lease_time_data *data =
4382 (struct nfs4_get_lease_time_data *)calldata;
4383
4384 dprintk("--> %s\n", __func__);
4385 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4386 switch (task->tk_status) {
4387 case -NFS4ERR_DELAY:
4388 case -NFS4ERR_GRACE:
4389 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4390 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4391 task->tk_status = 0;
4392 nfs_restart_rpc(task, data->clp);
4393 return;
4394 }
4395 dprintk("<-- %s\n", __func__);
4396}
4397
4398struct rpc_call_ops nfs4_get_lease_time_ops = {
4399 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4400 .rpc_call_done = nfs4_get_lease_time_done,
4401};
4402
4403int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4404{
4405 struct rpc_task *task;
4406 struct nfs4_get_lease_time_args args;
4407 struct nfs4_get_lease_time_res res = {
4408 .lr_fsinfo = fsinfo,
4409 };
4410 struct nfs4_get_lease_time_data data = {
4411 .args = &args,
4412 .res = &res,
4413 .clp = clp,
4414 };
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4417 .rpc_argp = &args,
4418 .rpc_resp = &res,
4419 };
4420 struct rpc_task_setup task_setup = {
4421 .rpc_client = clp->cl_rpcclient,
4422 .rpc_message = &msg,
4423 .callback_ops = &nfs4_get_lease_time_ops,
4424 .callback_data = &data
4425 };
4426 int status;
4427
4428 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4429 dprintk("--> %s\n", __func__);
4430 task = rpc_run_task(&task_setup);
4431
4432 if (IS_ERR(task))
4433 status = PTR_ERR(task);
4434 else {
4435 status = task->tk_status;
4436 rpc_put_task(task);
4437 }
4438 dprintk("<-- %s return %d\n", __func__, status);
4439
4440 return status;
4441}
4442
4443/*
4444 * Reset a slot table
4445 */
4446static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4447 int old_max_slots, int ivalue)
4448{
4449 int i;
4450 int ret = 0;
4451
4452 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4453
4454 /*
4455 * Until we have dynamic slot table adjustment, insist
4456 * upon the same slot table size
4457 */
4458 if (max_slots != old_max_slots) {
4459 dprintk("%s reset slot table does't match old\n",
4460 __func__);
4461 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4462 goto out;
4463 }
4464 spin_lock(&tbl->slot_tbl_lock);
4465 for (i = 0; i < max_slots; ++i)
4466 tbl->slots[i].seq_nr = ivalue;
4467 spin_unlock(&tbl->slot_tbl_lock);
4468 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4469 tbl, tbl->slots, tbl->max_slots);
4470out:
4471 dprintk("<-- %s: return %d\n", __func__, ret);
4472 return ret;
4473}
4474
4475/*
4476 * Reset the forechannel and backchannel slot tables
4477 */
4478static int nfs4_reset_slot_tables(struct nfs4_session *session)
4479{
4480 int status;
4481
4482 status = nfs4_reset_slot_table(&session->fc_slot_table,
4483 session->fc_attrs.max_reqs,
4484 session->fc_slot_table.max_slots,
4485 1);
4486 if (status)
4487 return status;
4488
4489 status = nfs4_reset_slot_table(&session->bc_slot_table,
4490 session->bc_attrs.max_reqs,
4491 session->bc_slot_table.max_slots,
4492 0);
4493 return status;
4494}
4495
4496/* Destroy the slot table */
4497static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4498{
4499 if (session->fc_slot_table.slots != NULL) {
4500 kfree(session->fc_slot_table.slots);
4501 session->fc_slot_table.slots = NULL;
4502 }
4503 if (session->bc_slot_table.slots != NULL) {
4504 kfree(session->bc_slot_table.slots);
4505 session->bc_slot_table.slots = NULL;
4506 }
4507 return;
4508}
4509
4510/*
4511 * Initialize slot table
4512 */
4513static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4514 int max_slots, int ivalue)
4515{
4516 struct nfs4_slot *slot;
4517 int ret = -ENOMEM;
4518
4519 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4520
4521 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4522
4523 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4524 if (!slot)
4525 goto out;
4526 ret = 0;
4527
4528 spin_lock(&tbl->slot_tbl_lock);
4529 tbl->max_slots = max_slots;
4530 tbl->slots = slot;
4531 tbl->highest_used_slotid = -1; /* no slot is currently used */
4532 spin_unlock(&tbl->slot_tbl_lock);
4533 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4534 tbl, tbl->slots, tbl->max_slots);
4535out:
4536 dprintk("<-- %s: return %d\n", __func__, ret);
4537 return ret;
4538}
4539
4540/*
4541 * Initialize the forechannel and backchannel tables
4542 */
4543static int nfs4_init_slot_tables(struct nfs4_session *session)
4544{
4545 struct nfs4_slot_table *tbl;
4546 int status = 0;
4547
4548 tbl = &session->fc_slot_table;
4549 if (tbl->slots == NULL) {
4550 status = nfs4_init_slot_table(tbl,
4551 session->fc_attrs.max_reqs, 1);
4552 if (status)
4553 return status;
4554 }
4555
4556 tbl = &session->bc_slot_table;
4557 if (tbl->slots == NULL) {
4558 status = nfs4_init_slot_table(tbl,
4559 session->bc_attrs.max_reqs, 0);
4560 if (status)
4561 nfs4_destroy_slot_tables(session);
4562 }
4563
4564 return status;
4565}
4566
4567struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4568{
4569 struct nfs4_session *session;
4570 struct nfs4_slot_table *tbl;
4571
4572 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4573 if (!session)
4574 return NULL;
4575
4576 /*
4577 * The create session reply races with the server back
4578 * channel probe. Mark the client NFS_CS_SESSION_INITING
4579 * so that the client back channel can find the
4580 * nfs_client struct
4581 */
4582 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4583 init_completion(&session->complete);
4584
4585 tbl = &session->fc_slot_table;
4586 tbl->highest_used_slotid = -1;
4587 spin_lock_init(&tbl->slot_tbl_lock);
4588 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4589
4590 tbl = &session->bc_slot_table;
4591 tbl->highest_used_slotid = -1;
4592 spin_lock_init(&tbl->slot_tbl_lock);
4593 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4594
4595 session->clp = clp;
4596 return session;
4597}
4598
4599void nfs4_destroy_session(struct nfs4_session *session)
4600{
4601 nfs4_proc_destroy_session(session);
4602 dprintk("%s Destroy backchannel for xprt %p\n",
4603 __func__, session->clp->cl_rpcclient->cl_xprt);
4604 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4605 NFS41_BC_MIN_CALLBACKS);
4606 nfs4_destroy_slot_tables(session);
4607 kfree(session);
4608}
4609
4610/*
4611 * Initialize the values to be used by the client in CREATE_SESSION
4612 * If nfs4_init_session set the fore channel request and response sizes,
4613 * use them.
4614 *
4615 * Set the back channel max_resp_sz_cached to zero to force the client to
4616 * always set csa_cachethis to FALSE because the current implementation
4617 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4618 */
4619static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4620{
4621 struct nfs4_session *session = args->client->cl_session;
4622 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4623 mxresp_sz = session->fc_attrs.max_resp_sz;
4624
4625 if (mxrqst_sz == 0)
4626 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4627 if (mxresp_sz == 0)
4628 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4629 /* Fore channel attributes */
4630 args->fc_attrs.headerpadsz = 0;
4631 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4632 args->fc_attrs.max_resp_sz = mxresp_sz;
4633 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4634 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4635 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4636
4637 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4638 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4639 __func__,
4640 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4641 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4642 args->fc_attrs.max_reqs);
4643
4644 /* Back channel attributes */
4645 args->bc_attrs.headerpadsz = 0;
4646 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4647 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4648 args->bc_attrs.max_resp_sz_cached = 0;
4649 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4650 args->bc_attrs.max_reqs = 1;
4651
4652 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4653 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4654 __func__,
4655 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4656 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4657 args->bc_attrs.max_reqs);
4658}
4659
4660static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4661{
4662 if (rcvd <= sent)
4663 return 0;
4664 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4665 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4666 return -EINVAL;
4667}
4668
4669#define _verify_fore_channel_attr(_name_) \
4670 _verify_channel_attr("fore", #_name_, \
4671 args->fc_attrs._name_, \
4672 session->fc_attrs._name_)
4673
4674#define _verify_back_channel_attr(_name_) \
4675 _verify_channel_attr("back", #_name_, \
4676 args->bc_attrs._name_, \
4677 session->bc_attrs._name_)
4678
4679/*
4680 * The server is not allowed to increase the fore channel header pad size,
4681 * maximum response size, or maximum number of operations.
4682 *
4683 * The back channel attributes are only negotiatied down: We send what the
4684 * (back channel) server insists upon.
4685 */
4686static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4687 struct nfs4_session *session)
4688{
4689 int ret = 0;
4690
4691 ret |= _verify_fore_channel_attr(headerpadsz);
4692 ret |= _verify_fore_channel_attr(max_resp_sz);
4693 ret |= _verify_fore_channel_attr(max_ops);
4694
4695 ret |= _verify_back_channel_attr(headerpadsz);
4696 ret |= _verify_back_channel_attr(max_rqst_sz);
4697 ret |= _verify_back_channel_attr(max_resp_sz);
4698 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4699 ret |= _verify_back_channel_attr(max_ops);
4700 ret |= _verify_back_channel_attr(max_reqs);
4701
4702 return ret;
4703}
4704
4705static int _nfs4_proc_create_session(struct nfs_client *clp)
4706{
4707 struct nfs4_session *session = clp->cl_session;
4708 struct nfs41_create_session_args args = {
4709 .client = clp,
4710 .cb_program = NFS4_CALLBACK,
4711 };
4712 struct nfs41_create_session_res res = {
4713 .client = clp,
4714 };
4715 struct rpc_message msg = {
4716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4717 .rpc_argp = &args,
4718 .rpc_resp = &res,
4719 };
4720 int status;
4721
4722 nfs4_init_channel_attrs(&args);
4723 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4724
4725 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4726
4727 if (!status)
4728 /* Verify the session's negotiated channel_attrs values */
4729 status = nfs4_verify_channel_attrs(&args, session);
4730 if (!status) {
4731 /* Increment the clientid slot sequence id */
4732 clp->cl_seqid++;
4733 }
4734
4735 return status;
4736}
4737
4738/*
4739 * Issues a CREATE_SESSION operation to the server.
4740 * It is the responsibility of the caller to verify the session is
4741 * expired before calling this routine.
4742 */
4743int nfs4_proc_create_session(struct nfs_client *clp)
4744{
4745 int status;
4746 unsigned *ptr;
4747 struct nfs4_session *session = clp->cl_session;
4748
4749 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4750
4751 status = _nfs4_proc_create_session(clp);
4752 if (status)
4753 goto out;
4754
4755 /* Init and reset the fore channel */
4756 status = nfs4_init_slot_tables(session);
4757 dprintk("slot table initialization returned %d\n", status);
4758 if (status)
4759 goto out;
4760 status = nfs4_reset_slot_tables(session);
4761 dprintk("slot table reset returned %d\n", status);
4762 if (status)
4763 goto out;
4764
4765 ptr = (unsigned *)&session->sess_id.data[0];
4766 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4767 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4768out:
4769 dprintk("<-- %s\n", __func__);
4770 return status;
4771}
4772
4773/*
4774 * Issue the over-the-wire RPC DESTROY_SESSION.
4775 * The caller must serialize access to this routine.
4776 */
4777int nfs4_proc_destroy_session(struct nfs4_session *session)
4778{
4779 int status = 0;
4780 struct rpc_message msg;
4781
4782 dprintk("--> nfs4_proc_destroy_session\n");
4783
4784 /* session is still being setup */
4785 if (session->clp->cl_cons_state != NFS_CS_READY)
4786 return status;
4787
4788 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4789 msg.rpc_argp = session;
4790 msg.rpc_resp = NULL;
4791 msg.rpc_cred = NULL;
4792 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4793
4794 if (status)
4795 printk(KERN_WARNING
4796 "Got error %d from the server on DESTROY_SESSION. "
4797 "Session has been destroyed regardless...\n", status);
4798
4799 dprintk("<-- nfs4_proc_destroy_session\n");
4800 return status;
4801}
4802
4803int nfs4_init_session(struct nfs_server *server)
4804{
4805 struct nfs_client *clp = server->nfs_client;
4806 struct nfs4_session *session;
4807 int ret;
4808
4809 if (!nfs4_has_session(clp))
4810 return 0;
4811
4812 session = clp->cl_session;
4813 session->fc_attrs.max_rqst_sz = server->wsize + nfs41_maxwrite_overhead;
4814 session->fc_attrs.max_resp_sz = server->rsize + nfs41_maxread_overhead;
4815
4816 ret = nfs4_recover_expired_lease(server);
4817 if (!ret)
4818 ret = nfs4_check_client_ready(clp);
4819 return ret;
4820}
4821
4822/*
4823 * Renew the cl_session lease.
4824 */
4825static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4826{
4827 struct nfs4_sequence_args args;
4828 struct nfs4_sequence_res res;
4829
4830 struct rpc_message msg = {
4831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4832 .rpc_argp = &args,
4833 .rpc_resp = &res,
4834 .rpc_cred = cred,
4835 };
4836
4837 args.sa_cache_this = 0;
4838
4839 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4840 &res, 0);
4841}
4842
4843void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4844{
4845 struct nfs_client *clp = (struct nfs_client *)data;
4846
4847 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4848
4849 if (task->tk_status < 0) {
4850 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4851
4852 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4853 == -EAGAIN) {
4854 nfs_restart_rpc(task, clp);
4855 return;
4856 }
4857 }
4858 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4859
4860 kfree(task->tk_msg.rpc_argp);
4861 kfree(task->tk_msg.rpc_resp);
4862
4863 dprintk("<-- %s\n", __func__);
4864}
4865
4866static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4867{
4868 struct nfs_client *clp;
4869 struct nfs4_sequence_args *args;
4870 struct nfs4_sequence_res *res;
4871
4872 clp = (struct nfs_client *)data;
4873 args = task->tk_msg.rpc_argp;
4874 res = task->tk_msg.rpc_resp;
4875
4876 if (nfs4_setup_sequence(clp, args, res, 0, task))
4877 return;
4878 rpc_call_start(task);
4879}
4880
4881static const struct rpc_call_ops nfs41_sequence_ops = {
4882 .rpc_call_done = nfs41_sequence_call_done,
4883 .rpc_call_prepare = nfs41_sequence_prepare,
4884};
4885
4886static int nfs41_proc_async_sequence(struct nfs_client *clp,
4887 struct rpc_cred *cred)
4888{
4889 struct nfs4_sequence_args *args;
4890 struct nfs4_sequence_res *res;
4891 struct rpc_message msg = {
4892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4893 .rpc_cred = cred,
4894 };
4895
4896 args = kzalloc(sizeof(*args), GFP_KERNEL);
4897 if (!args)
4898 return -ENOMEM;
4899 res = kzalloc(sizeof(*res), GFP_KERNEL);
4900 if (!res) {
4901 kfree(args);
4902 return -ENOMEM;
4903 }
4904 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4905 msg.rpc_argp = args;
4906 msg.rpc_resp = res;
4907
4908 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4909 &nfs41_sequence_ops, (void *)clp);
4910}
4911
4912struct nfs4_reclaim_complete_data {
4913 struct nfs_client *clp;
4914 struct nfs41_reclaim_complete_args arg;
4915 struct nfs41_reclaim_complete_res res;
4916};
4917
4918static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
4919{
4920 struct nfs4_reclaim_complete_data *calldata = data;
4921
4922 if (nfs4_setup_sequence(calldata->clp, &calldata->arg.seq_args,
4923 &calldata->res.seq_res, 0, task))
4924 return;
4925
4926 rpc_call_start(task);
4927}
4928
4929static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
4930{
4931 struct nfs4_reclaim_complete_data *calldata = data;
4932 struct nfs_client *clp = calldata->clp;
4933 struct nfs4_sequence_res *res = &calldata->res.seq_res;
4934
4935 dprintk("--> %s\n", __func__);
4936 nfs41_sequence_done(clp, res, task->tk_status);
4937 switch (task->tk_status) {
4938 case 0:
4939 case -NFS4ERR_COMPLETE_ALREADY:
4940 break;
4941 case -NFS4ERR_BADSESSION:
4942 case -NFS4ERR_DEADSESSION:
4943 /*
4944 * Handle the session error, but do not retry the operation, as
4945 * we have no way of telling whether the clientid had to be
4946 * reset before we got our reply. If reset, a new wave of
4947 * reclaim operations will follow, containing their own reclaim
4948 * complete. We don't want our retry to get on the way of
4949 * recovery by incorrectly indicating to the server that we're
4950 * done reclaiming state since the process had to be restarted.
4951 */
4952 _nfs4_async_handle_error(task, NULL, clp, NULL);
4953 break;
4954 default:
4955 if (_nfs4_async_handle_error(
4956 task, NULL, clp, NULL) == -EAGAIN) {
4957 rpc_restart_call_prepare(task);
4958 return;
4959 }
4960 }
4961
4962 dprintk("<-- %s\n", __func__);
4963}
4964
4965static void nfs4_free_reclaim_complete_data(void *data)
4966{
4967 struct nfs4_reclaim_complete_data *calldata = data;
4968
4969 kfree(calldata);
4970}
4971
4972static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
4973 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
4974 .rpc_call_done = nfs4_reclaim_complete_done,
4975 .rpc_release = nfs4_free_reclaim_complete_data,
4976};
4977
4978/*
4979 * Issue a global reclaim complete.
4980 */
4981static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
4982{
4983 struct nfs4_reclaim_complete_data *calldata;
4984 struct rpc_task *task;
4985 struct rpc_message msg = {
4986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
4987 };
4988 struct rpc_task_setup task_setup_data = {
4989 .rpc_client = clp->cl_rpcclient,
4990 .rpc_message = &msg,
4991 .callback_ops = &nfs4_reclaim_complete_call_ops,
4992 .flags = RPC_TASK_ASYNC,
4993 };
4994 int status = -ENOMEM;
4995
4996 dprintk("--> %s\n", __func__);
4997 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
4998 if (calldata == NULL)
4999 goto out;
5000 calldata->clp = clp;
5001 calldata->arg.one_fs = 0;
5002 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5003
5004 msg.rpc_argp = &calldata->arg;
5005 msg.rpc_resp = &calldata->res;
5006 task_setup_data.callback_data = calldata;
5007 task = rpc_run_task(&task_setup_data);
5008 if (IS_ERR(task))
5009 status = PTR_ERR(task);
5010 rpc_put_task(task);
5011out:
5012 dprintk("<-- %s status=%d\n", __func__, status);
5013 return status;
5014}
5015#endif /* CONFIG_NFS_V4_1 */
5016
5017struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5018 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5019 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5020 .recover_open = nfs4_open_reclaim,
5021 .recover_lock = nfs4_lock_reclaim,
5022 .establish_clid = nfs4_init_clientid,
5023 .get_clid_cred = nfs4_get_setclientid_cred,
5024};
5025
5026#if defined(CONFIG_NFS_V4_1)
5027struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5028 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5029 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5030 .recover_open = nfs4_open_reclaim,
5031 .recover_lock = nfs4_lock_reclaim,
5032 .establish_clid = nfs41_init_clientid,
5033 .get_clid_cred = nfs4_get_exchange_id_cred,
5034 .reclaim_complete = nfs41_proc_reclaim_complete,
5035};
5036#endif /* CONFIG_NFS_V4_1 */
5037
5038struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5039 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5040 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5041 .recover_open = nfs4_open_expired,
5042 .recover_lock = nfs4_lock_expired,
5043 .establish_clid = nfs4_init_clientid,
5044 .get_clid_cred = nfs4_get_setclientid_cred,
5045};
5046
5047#if defined(CONFIG_NFS_V4_1)
5048struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5049 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5050 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5051 .recover_open = nfs4_open_expired,
5052 .recover_lock = nfs4_lock_expired,
5053 .establish_clid = nfs41_init_clientid,
5054 .get_clid_cred = nfs4_get_exchange_id_cred,
5055};
5056#endif /* CONFIG_NFS_V4_1 */
5057
5058struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5059 .sched_state_renewal = nfs4_proc_async_renew,
5060 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5061 .renew_lease = nfs4_proc_renew,
5062};
5063
5064#if defined(CONFIG_NFS_V4_1)
5065struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5066 .sched_state_renewal = nfs41_proc_async_sequence,
5067 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5068 .renew_lease = nfs4_proc_sequence,
5069};
5070#endif
5071
5072/*
5073 * Per minor version reboot and network partition recovery ops
5074 */
5075
5076struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5077 &nfs40_reboot_recovery_ops,
5078#if defined(CONFIG_NFS_V4_1)
5079 &nfs41_reboot_recovery_ops,
5080#endif
5081};
5082
5083struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5084 &nfs40_nograce_recovery_ops,
5085#if defined(CONFIG_NFS_V4_1)
5086 &nfs41_nograce_recovery_ops,
5087#endif
5088};
5089
5090struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5091 &nfs40_state_renewal_ops,
5092#if defined(CONFIG_NFS_V4_1)
5093 &nfs41_state_renewal_ops,
5094#endif
5095};
5096
5097static const struct inode_operations nfs4_file_inode_operations = {
5098 .permission = nfs_permission,
5099 .getattr = nfs_getattr,
5100 .setattr = nfs_setattr,
5101 .getxattr = nfs4_getxattr,
5102 .setxattr = nfs4_setxattr,
5103 .listxattr = nfs4_listxattr,
5104};
5105
5106const struct nfs_rpc_ops nfs_v4_clientops = {
5107 .version = 4, /* protocol version */
5108 .dentry_ops = &nfs4_dentry_operations,
5109 .dir_inode_ops = &nfs4_dir_inode_operations,
5110 .file_inode_ops = &nfs4_file_inode_operations,
5111 .getroot = nfs4_proc_get_root,
5112 .getattr = nfs4_proc_getattr,
5113 .setattr = nfs4_proc_setattr,
5114 .lookupfh = nfs4_proc_lookupfh,
5115 .lookup = nfs4_proc_lookup,
5116 .access = nfs4_proc_access,
5117 .readlink = nfs4_proc_readlink,
5118 .create = nfs4_proc_create,
5119 .remove = nfs4_proc_remove,
5120 .unlink_setup = nfs4_proc_unlink_setup,
5121 .unlink_done = nfs4_proc_unlink_done,
5122 .rename = nfs4_proc_rename,
5123 .link = nfs4_proc_link,
5124 .symlink = nfs4_proc_symlink,
5125 .mkdir = nfs4_proc_mkdir,
5126 .rmdir = nfs4_proc_remove,
5127 .readdir = nfs4_proc_readdir,
5128 .mknod = nfs4_proc_mknod,
5129 .statfs = nfs4_proc_statfs,
5130 .fsinfo = nfs4_proc_fsinfo,
5131 .pathconf = nfs4_proc_pathconf,
5132 .set_capabilities = nfs4_server_capabilities,
5133 .decode_dirent = nfs4_decode_dirent,
5134 .read_setup = nfs4_proc_read_setup,
5135 .read_done = nfs4_read_done,
5136 .write_setup = nfs4_proc_write_setup,
5137 .write_done = nfs4_write_done,
5138 .commit_setup = nfs4_proc_commit_setup,
5139 .commit_done = nfs4_commit_done,
5140 .lock = nfs4_proc_lock,
5141 .clear_acl_cache = nfs4_zap_acl_attr,
5142 .close_context = nfs4_close_context,
5143};
5144
5145/*
5146 * Local variables:
5147 * c-basic-offset: 8
5148 * End:
5149 */
Linux 6.x block layer and io_uring tree(s)