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NFSv4: Ensure that the LOCK code sets exception->inode
[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/ratelimit.h>
43#include <linux/printk.h>
44#include <linux/slab.h>
45#include <linux/sunrpc/clnt.h>
46#include <linux/sunrpc/gss_api.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
51#include <linux/nfs_mount.h>
52#include <linux/namei.h>
53#include <linux/mount.h>
54#include <linux/module.h>
55#include <linux/nfs_idmap.h>
56#include <linux/sunrpc/bc_xprt.h>
57#include <linux/xattr.h>
58#include <linux/utsname.h>
59#include <linux/freezer.h>
60
61#include "nfs4_fs.h"
62#include "delegation.h"
63#include "internal.h"
64#include "iostat.h"
65#include "callback.h"
66#include "pnfs.h"
67
68#define NFSDBG_FACILITY NFSDBG_PROC
69
70#define NFS4_POLL_RETRY_MIN (HZ/10)
71#define NFS4_POLL_RETRY_MAX (15*HZ)
72
73#define NFS4_MAX_LOOP_ON_RECOVER (10)
74
75static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
76
77struct nfs4_opendata;
78static int _nfs4_proc_open(struct nfs4_opendata *data);
79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state);
87#ifdef CONFIG_NFS_V4_1
88static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90#endif
91/* Prevent leaks of NFSv4 errors into userland */
92static int nfs4_map_errors(int err)
93{
94 if (err >= -1000)
95 return err;
96 switch (err) {
97 case -NFS4ERR_RESOURCE:
98 return -EREMOTEIO;
99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
104 default:
105 dprintk("%s could not handle NFSv4 error %d\n",
106 __func__, -err);
107 break;
108 }
109 return -EIO;
110}
111
112/*
113 * This is our standard bitmap for GETATTR requests.
114 */
115const u32 nfs4_fattr_bitmap[2] = {
116 FATTR4_WORD0_TYPE
117 | FATTR4_WORD0_CHANGE
118 | FATTR4_WORD0_SIZE
119 | FATTR4_WORD0_FSID
120 | FATTR4_WORD0_FILEID,
121 FATTR4_WORD1_MODE
122 | FATTR4_WORD1_NUMLINKS
123 | FATTR4_WORD1_OWNER
124 | FATTR4_WORD1_OWNER_GROUP
125 | FATTR4_WORD1_RAWDEV
126 | FATTR4_WORD1_SPACE_USED
127 | FATTR4_WORD1_TIME_ACCESS
128 | FATTR4_WORD1_TIME_METADATA
129 | FATTR4_WORD1_TIME_MODIFY
130};
131
132const u32 nfs4_statfs_bitmap[2] = {
133 FATTR4_WORD0_FILES_AVAIL
134 | FATTR4_WORD0_FILES_FREE
135 | FATTR4_WORD0_FILES_TOTAL,
136 FATTR4_WORD1_SPACE_AVAIL
137 | FATTR4_WORD1_SPACE_FREE
138 | FATTR4_WORD1_SPACE_TOTAL
139};
140
141const u32 nfs4_pathconf_bitmap[2] = {
142 FATTR4_WORD0_MAXLINK
143 | FATTR4_WORD0_MAXNAME,
144 0
145};
146
147const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
148 | FATTR4_WORD0_MAXREAD
149 | FATTR4_WORD0_MAXWRITE
150 | FATTR4_WORD0_LEASE_TIME,
151 FATTR4_WORD1_TIME_DELTA
152 | FATTR4_WORD1_FS_LAYOUT_TYPES,
153 FATTR4_WORD2_LAYOUT_BLKSIZE
154};
155
156const u32 nfs4_fs_locations_bitmap[2] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_SIZE
160 | FATTR4_WORD0_FSID
161 | FATTR4_WORD0_FILEID
162 | FATTR4_WORD0_FS_LOCATIONS,
163 FATTR4_WORD1_MODE
164 | FATTR4_WORD1_NUMLINKS
165 | FATTR4_WORD1_OWNER
166 | FATTR4_WORD1_OWNER_GROUP
167 | FATTR4_WORD1_RAWDEV
168 | FATTR4_WORD1_SPACE_USED
169 | FATTR4_WORD1_TIME_ACCESS
170 | FATTR4_WORD1_TIME_METADATA
171 | FATTR4_WORD1_TIME_MODIFY
172 | FATTR4_WORD1_MOUNTED_ON_FILEID
173};
174
175static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
176 struct nfs4_readdir_arg *readdir)
177{
178 __be32 *start, *p;
179
180 BUG_ON(readdir->count < 80);
181 if (cookie > 2) {
182 readdir->cookie = cookie;
183 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
184 return;
185 }
186
187 readdir->cookie = 0;
188 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
189 if (cookie == 2)
190 return;
191
192 /*
193 * NFSv4 servers do not return entries for '.' and '..'
194 * Therefore, we fake these entries here. We let '.'
195 * have cookie 0 and '..' have cookie 1. Note that
196 * when talking to the server, we always send cookie 0
197 * instead of 1 or 2.
198 */
199 start = p = kmap_atomic(*readdir->pages);
200
201 if (cookie == 0) {
202 *p++ = xdr_one; /* next */
203 *p++ = xdr_zero; /* cookie, first word */
204 *p++ = xdr_one; /* cookie, second word */
205 *p++ = xdr_one; /* entry len */
206 memcpy(p, ".\0\0\0", 4); /* entry */
207 p++;
208 *p++ = xdr_one; /* bitmap length */
209 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
210 *p++ = htonl(8); /* attribute buffer length */
211 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
212 }
213
214 *p++ = xdr_one; /* next */
215 *p++ = xdr_zero; /* cookie, first word */
216 *p++ = xdr_two; /* cookie, second word */
217 *p++ = xdr_two; /* entry len */
218 memcpy(p, "..\0\0", 4); /* entry */
219 p++;
220 *p++ = xdr_one; /* bitmap length */
221 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
222 *p++ = htonl(8); /* attribute buffer length */
223 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
224
225 readdir->pgbase = (char *)p - (char *)start;
226 readdir->count -= readdir->pgbase;
227 kunmap_atomic(start);
228}
229
230static int nfs4_wait_clnt_recover(struct nfs_client *clp)
231{
232 int res;
233
234 might_sleep();
235
236 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
237 nfs_wait_bit_killable, TASK_KILLABLE);
238 return res;
239}
240
241static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
242{
243 int res = 0;
244
245 might_sleep();
246
247 if (*timeout <= 0)
248 *timeout = NFS4_POLL_RETRY_MIN;
249 if (*timeout > NFS4_POLL_RETRY_MAX)
250 *timeout = NFS4_POLL_RETRY_MAX;
251 freezable_schedule_timeout_killable(*timeout);
252 if (fatal_signal_pending(current))
253 res = -ERESTARTSYS;
254 *timeout <<= 1;
255 return res;
256}
257
258/* This is the error handling routine for processes that are allowed
259 * to sleep.
260 */
261static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
262{
263 struct nfs_client *clp = server->nfs_client;
264 struct nfs4_state *state = exception->state;
265 struct inode *inode = exception->inode;
266 int ret = errorcode;
267
268 exception->retry = 0;
269 switch(errorcode) {
270 case 0:
271 return 0;
272 case -NFS4ERR_OPENMODE:
273 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
274 nfs_inode_return_delegation(inode);
275 exception->retry = 1;
276 return 0;
277 }
278 if (state == NULL)
279 break;
280 nfs4_schedule_stateid_recovery(server, state);
281 goto wait_on_recovery;
282 case -NFS4ERR_DELEG_REVOKED:
283 case -NFS4ERR_ADMIN_REVOKED:
284 case -NFS4ERR_BAD_STATEID:
285 if (state == NULL)
286 break;
287 nfs_remove_bad_delegation(state->inode);
288 nfs4_schedule_stateid_recovery(server, state);
289 goto wait_on_recovery;
290 case -NFS4ERR_EXPIRED:
291 if (state != NULL)
292 nfs4_schedule_stateid_recovery(server, state);
293 case -NFS4ERR_STALE_STATEID:
294 case -NFS4ERR_STALE_CLIENTID:
295 nfs4_schedule_lease_recovery(clp);
296 goto wait_on_recovery;
297#if defined(CONFIG_NFS_V4_1)
298 case -NFS4ERR_BADSESSION:
299 case -NFS4ERR_BADSLOT:
300 case -NFS4ERR_BAD_HIGH_SLOT:
301 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
302 case -NFS4ERR_DEADSESSION:
303 case -NFS4ERR_SEQ_FALSE_RETRY:
304 case -NFS4ERR_SEQ_MISORDERED:
305 dprintk("%s ERROR: %d Reset session\n", __func__,
306 errorcode);
307 nfs4_schedule_session_recovery(clp->cl_session);
308 exception->retry = 1;
309 break;
310#endif /* defined(CONFIG_NFS_V4_1) */
311 case -NFS4ERR_FILE_OPEN:
312 if (exception->timeout > HZ) {
313 /* We have retried a decent amount, time to
314 * fail
315 */
316 ret = -EBUSY;
317 break;
318 }
319 case -NFS4ERR_GRACE:
320 case -NFS4ERR_DELAY:
321 case -EKEYEXPIRED:
322 ret = nfs4_delay(server->client, &exception->timeout);
323 if (ret != 0)
324 break;
325 case -NFS4ERR_RETRY_UNCACHED_REP:
326 case -NFS4ERR_OLD_STATEID:
327 exception->retry = 1;
328 break;
329 case -NFS4ERR_BADOWNER:
330 /* The following works around a Linux server bug! */
331 case -NFS4ERR_BADNAME:
332 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
333 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
334 exception->retry = 1;
335 printk(KERN_WARNING "NFS: v4 server %s "
336 "does not accept raw "
337 "uid/gids. "
338 "Reenabling the idmapper.\n",
339 server->nfs_client->cl_hostname);
340 }
341 }
342 /* We failed to handle the error */
343 return nfs4_map_errors(ret);
344wait_on_recovery:
345 ret = nfs4_wait_clnt_recover(clp);
346 if (ret == 0)
347 exception->retry = 1;
348 return ret;
349}
350
351
352static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
353{
354 spin_lock(&clp->cl_lock);
355 if (time_before(clp->cl_last_renewal,timestamp))
356 clp->cl_last_renewal = timestamp;
357 spin_unlock(&clp->cl_lock);
358}
359
360static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
361{
362 do_renew_lease(server->nfs_client, timestamp);
363}
364
365#if defined(CONFIG_NFS_V4_1)
366
367/*
368 * nfs4_free_slot - free a slot and efficiently update slot table.
369 *
370 * freeing a slot is trivially done by clearing its respective bit
371 * in the bitmap.
372 * If the freed slotid equals highest_used_slotid we want to update it
373 * so that the server would be able to size down the slot table if needed,
374 * otherwise we know that the highest_used_slotid is still in use.
375 * When updating highest_used_slotid there may be "holes" in the bitmap
376 * so we need to scan down from highest_used_slotid to 0 looking for the now
377 * highest slotid in use.
378 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
379 *
380 * Must be called while holding tbl->slot_tbl_lock
381 */
382static void
383nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
384{
385 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
386 /* clear used bit in bitmap */
387 __clear_bit(slotid, tbl->used_slots);
388
389 /* update highest_used_slotid when it is freed */
390 if (slotid == tbl->highest_used_slotid) {
391 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
392 if (slotid < tbl->max_slots)
393 tbl->highest_used_slotid = slotid;
394 else
395 tbl->highest_used_slotid = NFS4_NO_SLOT;
396 }
397 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
398 slotid, tbl->highest_used_slotid);
399}
400
401bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
402{
403 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
404 return true;
405}
406
407/*
408 * Signal state manager thread if session fore channel is drained
409 */
410static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
411{
412 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
413 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
414 nfs4_set_task_privileged, NULL);
415 return;
416 }
417
418 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
419 return;
420
421 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
422 complete(&ses->fc_slot_table.complete);
423}
424
425/*
426 * Signal state manager thread if session back channel is drained
427 */
428void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
429{
430 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
431 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
432 return;
433 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
434 complete(&ses->bc_slot_table.complete);
435}
436
437static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
438{
439 struct nfs4_slot_table *tbl;
440
441 tbl = &res->sr_session->fc_slot_table;
442 if (!res->sr_slot) {
443 /* just wake up the next guy waiting since
444 * we may have not consumed a slot after all */
445 dprintk("%s: No slot\n", __func__);
446 return;
447 }
448
449 spin_lock(&tbl->slot_tbl_lock);
450 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
451 nfs4_check_drain_fc_complete(res->sr_session);
452 spin_unlock(&tbl->slot_tbl_lock);
453 res->sr_slot = NULL;
454}
455
456static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
457{
458 unsigned long timestamp;
459 struct nfs_client *clp;
460
461 /*
462 * sr_status remains 1 if an RPC level error occurred. The server
463 * may or may not have processed the sequence operation..
464 * Proceed as if the server received and processed the sequence
465 * operation.
466 */
467 if (res->sr_status == 1)
468 res->sr_status = NFS_OK;
469
470 /* don't increment the sequence number if the task wasn't sent */
471 if (!RPC_WAS_SENT(task))
472 goto out;
473
474 /* Check the SEQUENCE operation status */
475 switch (res->sr_status) {
476 case 0:
477 /* Update the slot's sequence and clientid lease timer */
478 ++res->sr_slot->seq_nr;
479 timestamp = res->sr_renewal_time;
480 clp = res->sr_session->clp;
481 do_renew_lease(clp, timestamp);
482 /* Check sequence flags */
483 if (res->sr_status_flags != 0)
484 nfs4_schedule_lease_recovery(clp);
485 break;
486 case -NFS4ERR_DELAY:
487 /* The server detected a resend of the RPC call and
488 * returned NFS4ERR_DELAY as per Section 2.10.6.2
489 * of RFC5661.
490 */
491 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
492 __func__,
493 res->sr_slot - res->sr_session->fc_slot_table.slots,
494 res->sr_slot->seq_nr);
495 goto out_retry;
496 default:
497 /* Just update the slot sequence no. */
498 ++res->sr_slot->seq_nr;
499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
503 nfs41_sequence_free_slot(res);
504 return 1;
505out_retry:
506 if (!rpc_restart_call(task))
507 goto out;
508 rpc_delay(task, NFS4_POLL_RETRY_MAX);
509 return 0;
510}
511
512static int nfs4_sequence_done(struct rpc_task *task,
513 struct nfs4_sequence_res *res)
514{
515 if (res->sr_session == NULL)
516 return 1;
517 return nfs41_sequence_done(task, res);
518}
519
520/*
521 * nfs4_find_slot - efficiently look for a free slot
522 *
523 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
524 * If found, we mark the slot as used, update the highest_used_slotid,
525 * and respectively set up the sequence operation args.
526 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
527 *
528 * Note: must be called with under the slot_tbl_lock.
529 */
530static u32
531nfs4_find_slot(struct nfs4_slot_table *tbl)
532{
533 u32 slotid;
534 u32 ret_id = NFS4_NO_SLOT;
535
536 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
537 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
538 tbl->max_slots);
539 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
540 if (slotid >= tbl->max_slots)
541 goto out;
542 __set_bit(slotid, tbl->used_slots);
543 if (slotid > tbl->highest_used_slotid ||
544 tbl->highest_used_slotid == NFS4_NO_SLOT)
545 tbl->highest_used_slotid = slotid;
546 ret_id = slotid;
547out:
548 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
549 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
550 return ret_id;
551}
552
553static void nfs41_init_sequence(struct nfs4_sequence_args *args,
554 struct nfs4_sequence_res *res, int cache_reply)
555{
556 args->sa_session = NULL;
557 args->sa_cache_this = 0;
558 if (cache_reply)
559 args->sa_cache_this = 1;
560 res->sr_session = NULL;
561 res->sr_slot = NULL;
562}
563
564int nfs41_setup_sequence(struct nfs4_session *session,
565 struct nfs4_sequence_args *args,
566 struct nfs4_sequence_res *res,
567 struct rpc_task *task)
568{
569 struct nfs4_slot *slot;
570 struct nfs4_slot_table *tbl;
571 u32 slotid;
572
573 dprintk("--> %s\n", __func__);
574 /* slot already allocated? */
575 if (res->sr_slot != NULL)
576 return 0;
577
578 tbl = &session->fc_slot_table;
579
580 spin_lock(&tbl->slot_tbl_lock);
581 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
582 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
583 /* The state manager will wait until the slot table is empty */
584 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
585 spin_unlock(&tbl->slot_tbl_lock);
586 dprintk("%s session is draining\n", __func__);
587 return -EAGAIN;
588 }
589
590 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
591 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
592 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
593 spin_unlock(&tbl->slot_tbl_lock);
594 dprintk("%s enforce FIFO order\n", __func__);
595 return -EAGAIN;
596 }
597
598 slotid = nfs4_find_slot(tbl);
599 if (slotid == NFS4_NO_SLOT) {
600 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
601 spin_unlock(&tbl->slot_tbl_lock);
602 dprintk("<-- %s: no free slots\n", __func__);
603 return -EAGAIN;
604 }
605 spin_unlock(&tbl->slot_tbl_lock);
606
607 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
608 slot = tbl->slots + slotid;
609 args->sa_session = session;
610 args->sa_slotid = slotid;
611
612 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
613
614 res->sr_session = session;
615 res->sr_slot = slot;
616 res->sr_renewal_time = jiffies;
617 res->sr_status_flags = 0;
618 /*
619 * sr_status is only set in decode_sequence, and so will remain
620 * set to 1 if an rpc level failure occurs.
621 */
622 res->sr_status = 1;
623 return 0;
624}
625EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
626
627int nfs4_setup_sequence(const struct nfs_server *server,
628 struct nfs4_sequence_args *args,
629 struct nfs4_sequence_res *res,
630 struct rpc_task *task)
631{
632 struct nfs4_session *session = nfs4_get_session(server);
633 int ret = 0;
634
635 if (session == NULL)
636 goto out;
637
638 dprintk("--> %s clp %p session %p sr_slot %td\n",
639 __func__, session->clp, session, res->sr_slot ?
640 res->sr_slot - session->fc_slot_table.slots : -1);
641
642 ret = nfs41_setup_sequence(session, args, res, task);
643out:
644 dprintk("<-- %s status=%d\n", __func__, ret);
645 return ret;
646}
647
648struct nfs41_call_sync_data {
649 const struct nfs_server *seq_server;
650 struct nfs4_sequence_args *seq_args;
651 struct nfs4_sequence_res *seq_res;
652};
653
654static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
655{
656 struct nfs41_call_sync_data *data = calldata;
657
658 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
659
660 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
661 data->seq_res, task))
662 return;
663 rpc_call_start(task);
664}
665
666static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
667{
668 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
669 nfs41_call_sync_prepare(task, calldata);
670}
671
672static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
673{
674 struct nfs41_call_sync_data *data = calldata;
675
676 nfs41_sequence_done(task, data->seq_res);
677}
678
679static const struct rpc_call_ops nfs41_call_sync_ops = {
680 .rpc_call_prepare = nfs41_call_sync_prepare,
681 .rpc_call_done = nfs41_call_sync_done,
682};
683
684static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
685 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
686 .rpc_call_done = nfs41_call_sync_done,
687};
688
689static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
690 struct nfs_server *server,
691 struct rpc_message *msg,
692 struct nfs4_sequence_args *args,
693 struct nfs4_sequence_res *res,
694 int privileged)
695{
696 int ret;
697 struct rpc_task *task;
698 struct nfs41_call_sync_data data = {
699 .seq_server = server,
700 .seq_args = args,
701 .seq_res = res,
702 };
703 struct rpc_task_setup task_setup = {
704 .rpc_client = clnt,
705 .rpc_message = msg,
706 .callback_ops = &nfs41_call_sync_ops,
707 .callback_data = &data
708 };
709
710 if (privileged)
711 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
712 task = rpc_run_task(&task_setup);
713 if (IS_ERR(task))
714 ret = PTR_ERR(task);
715 else {
716 ret = task->tk_status;
717 rpc_put_task(task);
718 }
719 return ret;
720}
721
722int _nfs4_call_sync_session(struct rpc_clnt *clnt,
723 struct nfs_server *server,
724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
727 int cache_reply)
728{
729 nfs41_init_sequence(args, res, cache_reply);
730 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
731}
732
733#else
734static inline
735void nfs41_init_sequence(struct nfs4_sequence_args *args,
736 struct nfs4_sequence_res *res, int cache_reply)
737{
738}
739
740static int nfs4_sequence_done(struct rpc_task *task,
741 struct nfs4_sequence_res *res)
742{
743 return 1;
744}
745#endif /* CONFIG_NFS_V4_1 */
746
747int _nfs4_call_sync(struct rpc_clnt *clnt,
748 struct nfs_server *server,
749 struct rpc_message *msg,
750 struct nfs4_sequence_args *args,
751 struct nfs4_sequence_res *res,
752 int cache_reply)
753{
754 nfs41_init_sequence(args, res, cache_reply);
755 return rpc_call_sync(clnt, msg, 0);
756}
757
758static inline
759int nfs4_call_sync(struct rpc_clnt *clnt,
760 struct nfs_server *server,
761 struct rpc_message *msg,
762 struct nfs4_sequence_args *args,
763 struct nfs4_sequence_res *res,
764 int cache_reply)
765{
766 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
767 args, res, cache_reply);
768}
769
770static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
771{
772 struct nfs_inode *nfsi = NFS_I(dir);
773
774 spin_lock(&dir->i_lock);
775 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
776 if (!cinfo->atomic || cinfo->before != dir->i_version)
777 nfs_force_lookup_revalidate(dir);
778 dir->i_version = cinfo->after;
779 spin_unlock(&dir->i_lock);
780}
781
782struct nfs4_opendata {
783 struct kref kref;
784 struct nfs_openargs o_arg;
785 struct nfs_openres o_res;
786 struct nfs_open_confirmargs c_arg;
787 struct nfs_open_confirmres c_res;
788 struct nfs4_string owner_name;
789 struct nfs4_string group_name;
790 struct nfs_fattr f_attr;
791 struct nfs_fattr dir_attr;
792 struct dentry *dir;
793 struct dentry *dentry;
794 struct nfs4_state_owner *owner;
795 struct nfs4_state *state;
796 struct iattr attrs;
797 unsigned long timestamp;
798 unsigned int rpc_done : 1;
799 int rpc_status;
800 int cancelled;
801};
802
803
804static void nfs4_init_opendata_res(struct nfs4_opendata *p)
805{
806 p->o_res.f_attr = &p->f_attr;
807 p->o_res.dir_attr = &p->dir_attr;
808 p->o_res.seqid = p->o_arg.seqid;
809 p->c_res.seqid = p->c_arg.seqid;
810 p->o_res.server = p->o_arg.server;
811 nfs_fattr_init(&p->f_attr);
812 nfs_fattr_init(&p->dir_attr);
813 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
814}
815
816static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
817 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
818 const struct iattr *attrs,
819 gfp_t gfp_mask)
820{
821 struct dentry *parent = dget_parent(dentry);
822 struct inode *dir = parent->d_inode;
823 struct nfs_server *server = NFS_SERVER(dir);
824 struct nfs4_opendata *p;
825
826 p = kzalloc(sizeof(*p), gfp_mask);
827 if (p == NULL)
828 goto err;
829 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
830 if (p->o_arg.seqid == NULL)
831 goto err_free;
832 nfs_sb_active(dentry->d_sb);
833 p->dentry = dget(dentry);
834 p->dir = parent;
835 p->owner = sp;
836 atomic_inc(&sp->so_count);
837 p->o_arg.fh = NFS_FH(dir);
838 p->o_arg.open_flags = flags;
839 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
840 p->o_arg.clientid = server->nfs_client->cl_clientid;
841 p->o_arg.id = sp->so_seqid.owner_id;
842 p->o_arg.name = &dentry->d_name;
843 p->o_arg.server = server;
844 p->o_arg.bitmask = server->attr_bitmask;
845 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
846 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
847 if (attrs != NULL && attrs->ia_valid != 0) {
848 __be32 verf[2];
849
850 p->o_arg.u.attrs = &p->attrs;
851 memcpy(&p->attrs, attrs, sizeof(p->attrs));
852
853 verf[0] = jiffies;
854 verf[1] = current->pid;
855 memcpy(p->o_arg.u.verifier.data, verf,
856 sizeof(p->o_arg.u.verifier.data));
857 }
858 p->c_arg.fh = &p->o_res.fh;
859 p->c_arg.stateid = &p->o_res.stateid;
860 p->c_arg.seqid = p->o_arg.seqid;
861 nfs4_init_opendata_res(p);
862 kref_init(&p->kref);
863 return p;
864err_free:
865 kfree(p);
866err:
867 dput(parent);
868 return NULL;
869}
870
871static void nfs4_opendata_free(struct kref *kref)
872{
873 struct nfs4_opendata *p = container_of(kref,
874 struct nfs4_opendata, kref);
875 struct super_block *sb = p->dentry->d_sb;
876
877 nfs_free_seqid(p->o_arg.seqid);
878 if (p->state != NULL)
879 nfs4_put_open_state(p->state);
880 nfs4_put_state_owner(p->owner);
881 dput(p->dir);
882 dput(p->dentry);
883 nfs_sb_deactive(sb);
884 nfs_fattr_free_names(&p->f_attr);
885 kfree(p);
886}
887
888static void nfs4_opendata_put(struct nfs4_opendata *p)
889{
890 if (p != NULL)
891 kref_put(&p->kref, nfs4_opendata_free);
892}
893
894static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
895{
896 int ret;
897
898 ret = rpc_wait_for_completion_task(task);
899 return ret;
900}
901
902static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
903{
904 int ret = 0;
905
906 if (open_mode & (O_EXCL|O_TRUNC))
907 goto out;
908 switch (mode & (FMODE_READ|FMODE_WRITE)) {
909 case FMODE_READ:
910 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
911 && state->n_rdonly != 0;
912 break;
913 case FMODE_WRITE:
914 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
915 && state->n_wronly != 0;
916 break;
917 case FMODE_READ|FMODE_WRITE:
918 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
919 && state->n_rdwr != 0;
920 }
921out:
922 return ret;
923}
924
925static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
926{
927 if (delegation == NULL)
928 return 0;
929 if ((delegation->type & fmode) != fmode)
930 return 0;
931 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
932 return 0;
933 nfs_mark_delegation_referenced(delegation);
934 return 1;
935}
936
937static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
938{
939 switch (fmode) {
940 case FMODE_WRITE:
941 state->n_wronly++;
942 break;
943 case FMODE_READ:
944 state->n_rdonly++;
945 break;
946 case FMODE_READ|FMODE_WRITE:
947 state->n_rdwr++;
948 }
949 nfs4_state_set_mode_locked(state, state->state | fmode);
950}
951
952static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
953{
954 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
955 nfs4_stateid_copy(&state->stateid, stateid);
956 nfs4_stateid_copy(&state->open_stateid, stateid);
957 switch (fmode) {
958 case FMODE_READ:
959 set_bit(NFS_O_RDONLY_STATE, &state->flags);
960 break;
961 case FMODE_WRITE:
962 set_bit(NFS_O_WRONLY_STATE, &state->flags);
963 break;
964 case FMODE_READ|FMODE_WRITE:
965 set_bit(NFS_O_RDWR_STATE, &state->flags);
966 }
967}
968
969static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
970{
971 write_seqlock(&state->seqlock);
972 nfs_set_open_stateid_locked(state, stateid, fmode);
973 write_sequnlock(&state->seqlock);
974}
975
976static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
977{
978 /*
979 * Protect the call to nfs4_state_set_mode_locked and
980 * serialise the stateid update
981 */
982 write_seqlock(&state->seqlock);
983 if (deleg_stateid != NULL) {
984 nfs4_stateid_copy(&state->stateid, deleg_stateid);
985 set_bit(NFS_DELEGATED_STATE, &state->flags);
986 }
987 if (open_stateid != NULL)
988 nfs_set_open_stateid_locked(state, open_stateid, fmode);
989 write_sequnlock(&state->seqlock);
990 spin_lock(&state->owner->so_lock);
991 update_open_stateflags(state, fmode);
992 spin_unlock(&state->owner->so_lock);
993}
994
995static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
996{
997 struct nfs_inode *nfsi = NFS_I(state->inode);
998 struct nfs_delegation *deleg_cur;
999 int ret = 0;
1000
1001 fmode &= (FMODE_READ|FMODE_WRITE);
1002
1003 rcu_read_lock();
1004 deleg_cur = rcu_dereference(nfsi->delegation);
1005 if (deleg_cur == NULL)
1006 goto no_delegation;
1007
1008 spin_lock(&deleg_cur->lock);
1009 if (nfsi->delegation != deleg_cur ||
1010 (deleg_cur->type & fmode) != fmode)
1011 goto no_delegation_unlock;
1012
1013 if (delegation == NULL)
1014 delegation = &deleg_cur->stateid;
1015 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1016 goto no_delegation_unlock;
1017
1018 nfs_mark_delegation_referenced(deleg_cur);
1019 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1020 ret = 1;
1021no_delegation_unlock:
1022 spin_unlock(&deleg_cur->lock);
1023no_delegation:
1024 rcu_read_unlock();
1025
1026 if (!ret && open_stateid != NULL) {
1027 __update_open_stateid(state, open_stateid, NULL, fmode);
1028 ret = 1;
1029 }
1030
1031 return ret;
1032}
1033
1034
1035static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1036{
1037 struct nfs_delegation *delegation;
1038
1039 rcu_read_lock();
1040 delegation = rcu_dereference(NFS_I(inode)->delegation);
1041 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1042 rcu_read_unlock();
1043 return;
1044 }
1045 rcu_read_unlock();
1046 nfs_inode_return_delegation(inode);
1047}
1048
1049static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1050{
1051 struct nfs4_state *state = opendata->state;
1052 struct nfs_inode *nfsi = NFS_I(state->inode);
1053 struct nfs_delegation *delegation;
1054 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1055 fmode_t fmode = opendata->o_arg.fmode;
1056 nfs4_stateid stateid;
1057 int ret = -EAGAIN;
1058
1059 for (;;) {
1060 if (can_open_cached(state, fmode, open_mode)) {
1061 spin_lock(&state->owner->so_lock);
1062 if (can_open_cached(state, fmode, open_mode)) {
1063 update_open_stateflags(state, fmode);
1064 spin_unlock(&state->owner->so_lock);
1065 goto out_return_state;
1066 }
1067 spin_unlock(&state->owner->so_lock);
1068 }
1069 rcu_read_lock();
1070 delegation = rcu_dereference(nfsi->delegation);
1071 if (!can_open_delegated(delegation, fmode)) {
1072 rcu_read_unlock();
1073 break;
1074 }
1075 /* Save the delegation */
1076 nfs4_stateid_copy(&stateid, &delegation->stateid);
1077 rcu_read_unlock();
1078 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1079 if (ret != 0)
1080 goto out;
1081 ret = -EAGAIN;
1082
1083 /* Try to update the stateid using the delegation */
1084 if (update_open_stateid(state, NULL, &stateid, fmode))
1085 goto out_return_state;
1086 }
1087out:
1088 return ERR_PTR(ret);
1089out_return_state:
1090 atomic_inc(&state->count);
1091 return state;
1092}
1093
1094static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1095{
1096 struct inode *inode;
1097 struct nfs4_state *state = NULL;
1098 struct nfs_delegation *delegation;
1099 int ret;
1100
1101 if (!data->rpc_done) {
1102 state = nfs4_try_open_cached(data);
1103 goto out;
1104 }
1105
1106 ret = -EAGAIN;
1107 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1108 goto err;
1109 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1110 ret = PTR_ERR(inode);
1111 if (IS_ERR(inode))
1112 goto err;
1113 ret = -ENOMEM;
1114 state = nfs4_get_open_state(inode, data->owner);
1115 if (state == NULL)
1116 goto err_put_inode;
1117 if (data->o_res.delegation_type != 0) {
1118 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1119 int delegation_flags = 0;
1120
1121 rcu_read_lock();
1122 delegation = rcu_dereference(NFS_I(inode)->delegation);
1123 if (delegation)
1124 delegation_flags = delegation->flags;
1125 rcu_read_unlock();
1126 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1127 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1128 "returning a delegation for "
1129 "OPEN(CLAIM_DELEGATE_CUR)\n",
1130 clp->cl_hostname);
1131 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1132 nfs_inode_set_delegation(state->inode,
1133 data->owner->so_cred,
1134 &data->o_res);
1135 else
1136 nfs_inode_reclaim_delegation(state->inode,
1137 data->owner->so_cred,
1138 &data->o_res);
1139 }
1140
1141 update_open_stateid(state, &data->o_res.stateid, NULL,
1142 data->o_arg.fmode);
1143 iput(inode);
1144out:
1145 return state;
1146err_put_inode:
1147 iput(inode);
1148err:
1149 return ERR_PTR(ret);
1150}
1151
1152static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1153{
1154 struct nfs_inode *nfsi = NFS_I(state->inode);
1155 struct nfs_open_context *ctx;
1156
1157 spin_lock(&state->inode->i_lock);
1158 list_for_each_entry(ctx, &nfsi->open_files, list) {
1159 if (ctx->state != state)
1160 continue;
1161 get_nfs_open_context(ctx);
1162 spin_unlock(&state->inode->i_lock);
1163 return ctx;
1164 }
1165 spin_unlock(&state->inode->i_lock);
1166 return ERR_PTR(-ENOENT);
1167}
1168
1169static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1170{
1171 struct nfs4_opendata *opendata;
1172
1173 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1174 if (opendata == NULL)
1175 return ERR_PTR(-ENOMEM);
1176 opendata->state = state;
1177 atomic_inc(&state->count);
1178 return opendata;
1179}
1180
1181static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1182{
1183 struct nfs4_state *newstate;
1184 int ret;
1185
1186 opendata->o_arg.open_flags = 0;
1187 opendata->o_arg.fmode = fmode;
1188 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1189 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1190 nfs4_init_opendata_res(opendata);
1191 ret = _nfs4_recover_proc_open(opendata);
1192 if (ret != 0)
1193 return ret;
1194 newstate = nfs4_opendata_to_nfs4_state(opendata);
1195 if (IS_ERR(newstate))
1196 return PTR_ERR(newstate);
1197 nfs4_close_state(newstate, fmode);
1198 *res = newstate;
1199 return 0;
1200}
1201
1202static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1203{
1204 struct nfs4_state *newstate;
1205 int ret;
1206
1207 /* memory barrier prior to reading state->n_* */
1208 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1209 smp_rmb();
1210 if (state->n_rdwr != 0) {
1211 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1212 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1213 if (ret != 0)
1214 return ret;
1215 if (newstate != state)
1216 return -ESTALE;
1217 }
1218 if (state->n_wronly != 0) {
1219 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1220 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1221 if (ret != 0)
1222 return ret;
1223 if (newstate != state)
1224 return -ESTALE;
1225 }
1226 if (state->n_rdonly != 0) {
1227 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1229 if (ret != 0)
1230 return ret;
1231 if (newstate != state)
1232 return -ESTALE;
1233 }
1234 /*
1235 * We may have performed cached opens for all three recoveries.
1236 * Check if we need to update the current stateid.
1237 */
1238 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1239 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1240 write_seqlock(&state->seqlock);
1241 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1242 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1243 write_sequnlock(&state->seqlock);
1244 }
1245 return 0;
1246}
1247
1248/*
1249 * OPEN_RECLAIM:
1250 * reclaim state on the server after a reboot.
1251 */
1252static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1253{
1254 struct nfs_delegation *delegation;
1255 struct nfs4_opendata *opendata;
1256 fmode_t delegation_type = 0;
1257 int status;
1258
1259 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1260 if (IS_ERR(opendata))
1261 return PTR_ERR(opendata);
1262 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1263 opendata->o_arg.fh = NFS_FH(state->inode);
1264 rcu_read_lock();
1265 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1266 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1267 delegation_type = delegation->type;
1268 rcu_read_unlock();
1269 opendata->o_arg.u.delegation_type = delegation_type;
1270 status = nfs4_open_recover(opendata, state);
1271 nfs4_opendata_put(opendata);
1272 return status;
1273}
1274
1275static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1276{
1277 struct nfs_server *server = NFS_SERVER(state->inode);
1278 struct nfs4_exception exception = { };
1279 int err;
1280 do {
1281 err = _nfs4_do_open_reclaim(ctx, state);
1282 if (err != -NFS4ERR_DELAY)
1283 break;
1284 nfs4_handle_exception(server, err, &exception);
1285 } while (exception.retry);
1286 return err;
1287}
1288
1289static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1290{
1291 struct nfs_open_context *ctx;
1292 int ret;
1293
1294 ctx = nfs4_state_find_open_context(state);
1295 if (IS_ERR(ctx))
1296 return PTR_ERR(ctx);
1297 ret = nfs4_do_open_reclaim(ctx, state);
1298 put_nfs_open_context(ctx);
1299 return ret;
1300}
1301
1302static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303{
1304 struct nfs4_opendata *opendata;
1305 int ret;
1306
1307 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1308 if (IS_ERR(opendata))
1309 return PTR_ERR(opendata);
1310 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1311 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1312 ret = nfs4_open_recover(opendata, state);
1313 nfs4_opendata_put(opendata);
1314 return ret;
1315}
1316
1317int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1318{
1319 struct nfs4_exception exception = { };
1320 struct nfs_server *server = NFS_SERVER(state->inode);
1321 int err;
1322 do {
1323 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1324 switch (err) {
1325 case 0:
1326 case -ENOENT:
1327 case -ESTALE:
1328 goto out;
1329 case -NFS4ERR_BADSESSION:
1330 case -NFS4ERR_BADSLOT:
1331 case -NFS4ERR_BAD_HIGH_SLOT:
1332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1333 case -NFS4ERR_DEADSESSION:
1334 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1335 goto out;
1336 case -NFS4ERR_STALE_CLIENTID:
1337 case -NFS4ERR_STALE_STATEID:
1338 case -NFS4ERR_EXPIRED:
1339 /* Don't recall a delegation if it was lost */
1340 nfs4_schedule_lease_recovery(server->nfs_client);
1341 goto out;
1342 case -ERESTARTSYS:
1343 /*
1344 * The show must go on: exit, but mark the
1345 * stateid as needing recovery.
1346 */
1347 case -NFS4ERR_DELEG_REVOKED:
1348 case -NFS4ERR_ADMIN_REVOKED:
1349 case -NFS4ERR_BAD_STATEID:
1350 nfs_inode_find_state_and_recover(state->inode,
1351 stateid);
1352 nfs4_schedule_stateid_recovery(server, state);
1353 case -EKEYEXPIRED:
1354 /*
1355 * User RPCSEC_GSS context has expired.
1356 * We cannot recover this stateid now, so
1357 * skip it and allow recovery thread to
1358 * proceed.
1359 */
1360 case -ENOMEM:
1361 err = 0;
1362 goto out;
1363 }
1364 err = nfs4_handle_exception(server, err, &exception);
1365 } while (exception.retry);
1366out:
1367 return err;
1368}
1369
1370static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1371{
1372 struct nfs4_opendata *data = calldata;
1373
1374 data->rpc_status = task->tk_status;
1375 if (data->rpc_status == 0) {
1376 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1377 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1378 renew_lease(data->o_res.server, data->timestamp);
1379 data->rpc_done = 1;
1380 }
1381}
1382
1383static void nfs4_open_confirm_release(void *calldata)
1384{
1385 struct nfs4_opendata *data = calldata;
1386 struct nfs4_state *state = NULL;
1387
1388 /* If this request hasn't been cancelled, do nothing */
1389 if (data->cancelled == 0)
1390 goto out_free;
1391 /* In case of error, no cleanup! */
1392 if (!data->rpc_done)
1393 goto out_free;
1394 state = nfs4_opendata_to_nfs4_state(data);
1395 if (!IS_ERR(state))
1396 nfs4_close_state(state, data->o_arg.fmode);
1397out_free:
1398 nfs4_opendata_put(data);
1399}
1400
1401static const struct rpc_call_ops nfs4_open_confirm_ops = {
1402 .rpc_call_done = nfs4_open_confirm_done,
1403 .rpc_release = nfs4_open_confirm_release,
1404};
1405
1406/*
1407 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1408 */
1409static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1410{
1411 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1412 struct rpc_task *task;
1413 struct rpc_message msg = {
1414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1415 .rpc_argp = &data->c_arg,
1416 .rpc_resp = &data->c_res,
1417 .rpc_cred = data->owner->so_cred,
1418 };
1419 struct rpc_task_setup task_setup_data = {
1420 .rpc_client = server->client,
1421 .rpc_message = &msg,
1422 .callback_ops = &nfs4_open_confirm_ops,
1423 .callback_data = data,
1424 .workqueue = nfsiod_workqueue,
1425 .flags = RPC_TASK_ASYNC,
1426 };
1427 int status;
1428
1429 kref_get(&data->kref);
1430 data->rpc_done = 0;
1431 data->rpc_status = 0;
1432 data->timestamp = jiffies;
1433 task = rpc_run_task(&task_setup_data);
1434 if (IS_ERR(task))
1435 return PTR_ERR(task);
1436 status = nfs4_wait_for_completion_rpc_task(task);
1437 if (status != 0) {
1438 data->cancelled = 1;
1439 smp_wmb();
1440 } else
1441 status = data->rpc_status;
1442 rpc_put_task(task);
1443 return status;
1444}
1445
1446static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1447{
1448 struct nfs4_opendata *data = calldata;
1449 struct nfs4_state_owner *sp = data->owner;
1450
1451 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1452 return;
1453 /*
1454 * Check if we still need to send an OPEN call, or if we can use
1455 * a delegation instead.
1456 */
1457 if (data->state != NULL) {
1458 struct nfs_delegation *delegation;
1459
1460 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1461 goto out_no_action;
1462 rcu_read_lock();
1463 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1464 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1465 can_open_delegated(delegation, data->o_arg.fmode))
1466 goto unlock_no_action;
1467 rcu_read_unlock();
1468 }
1469 /* Update sequence id. */
1470 data->o_arg.id = sp->so_seqid.owner_id;
1471 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1472 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1473 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1474 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1475 }
1476 data->timestamp = jiffies;
1477 if (nfs4_setup_sequence(data->o_arg.server,
1478 &data->o_arg.seq_args,
1479 &data->o_res.seq_res, task))
1480 return;
1481 rpc_call_start(task);
1482 return;
1483unlock_no_action:
1484 rcu_read_unlock();
1485out_no_action:
1486 task->tk_action = NULL;
1487
1488}
1489
1490static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1491{
1492 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1493 nfs4_open_prepare(task, calldata);
1494}
1495
1496static void nfs4_open_done(struct rpc_task *task, void *calldata)
1497{
1498 struct nfs4_opendata *data = calldata;
1499
1500 data->rpc_status = task->tk_status;
1501
1502 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1503 return;
1504
1505 if (task->tk_status == 0) {
1506 switch (data->o_res.f_attr->mode & S_IFMT) {
1507 case S_IFREG:
1508 break;
1509 case S_IFLNK:
1510 data->rpc_status = -ELOOP;
1511 break;
1512 case S_IFDIR:
1513 data->rpc_status = -EISDIR;
1514 break;
1515 default:
1516 data->rpc_status = -ENOTDIR;
1517 }
1518 renew_lease(data->o_res.server, data->timestamp);
1519 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1520 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1521 }
1522 data->rpc_done = 1;
1523}
1524
1525static void nfs4_open_release(void *calldata)
1526{
1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state *state = NULL;
1529
1530 /* If this request hasn't been cancelled, do nothing */
1531 if (data->cancelled == 0)
1532 goto out_free;
1533 /* In case of error, no cleanup! */
1534 if (data->rpc_status != 0 || !data->rpc_done)
1535 goto out_free;
1536 /* In case we need an open_confirm, no cleanup! */
1537 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1538 goto out_free;
1539 state = nfs4_opendata_to_nfs4_state(data);
1540 if (!IS_ERR(state))
1541 nfs4_close_state(state, data->o_arg.fmode);
1542out_free:
1543 nfs4_opendata_put(data);
1544}
1545
1546static const struct rpc_call_ops nfs4_open_ops = {
1547 .rpc_call_prepare = nfs4_open_prepare,
1548 .rpc_call_done = nfs4_open_done,
1549 .rpc_release = nfs4_open_release,
1550};
1551
1552static const struct rpc_call_ops nfs4_recover_open_ops = {
1553 .rpc_call_prepare = nfs4_recover_open_prepare,
1554 .rpc_call_done = nfs4_open_done,
1555 .rpc_release = nfs4_open_release,
1556};
1557
1558static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1559{
1560 struct inode *dir = data->dir->d_inode;
1561 struct nfs_server *server = NFS_SERVER(dir);
1562 struct nfs_openargs *o_arg = &data->o_arg;
1563 struct nfs_openres *o_res = &data->o_res;
1564 struct rpc_task *task;
1565 struct rpc_message msg = {
1566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1567 .rpc_argp = o_arg,
1568 .rpc_resp = o_res,
1569 .rpc_cred = data->owner->so_cred,
1570 };
1571 struct rpc_task_setup task_setup_data = {
1572 .rpc_client = server->client,
1573 .rpc_message = &msg,
1574 .callback_ops = &nfs4_open_ops,
1575 .callback_data = data,
1576 .workqueue = nfsiod_workqueue,
1577 .flags = RPC_TASK_ASYNC,
1578 };
1579 int status;
1580
1581 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1582 kref_get(&data->kref);
1583 data->rpc_done = 0;
1584 data->rpc_status = 0;
1585 data->cancelled = 0;
1586 if (isrecover)
1587 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1588 task = rpc_run_task(&task_setup_data);
1589 if (IS_ERR(task))
1590 return PTR_ERR(task);
1591 status = nfs4_wait_for_completion_rpc_task(task);
1592 if (status != 0) {
1593 data->cancelled = 1;
1594 smp_wmb();
1595 } else
1596 status = data->rpc_status;
1597 rpc_put_task(task);
1598
1599 return status;
1600}
1601
1602static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1603{
1604 struct inode *dir = data->dir->d_inode;
1605 struct nfs_openres *o_res = &data->o_res;
1606 int status;
1607
1608 status = nfs4_run_open_task(data, 1);
1609 if (status != 0 || !data->rpc_done)
1610 return status;
1611
1612 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1613
1614 nfs_refresh_inode(dir, o_res->dir_attr);
1615
1616 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1617 status = _nfs4_proc_open_confirm(data);
1618 if (status != 0)
1619 return status;
1620 }
1621
1622 return status;
1623}
1624
1625/*
1626 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1627 */
1628static int _nfs4_proc_open(struct nfs4_opendata *data)
1629{
1630 struct inode *dir = data->dir->d_inode;
1631 struct nfs_server *server = NFS_SERVER(dir);
1632 struct nfs_openargs *o_arg = &data->o_arg;
1633 struct nfs_openres *o_res = &data->o_res;
1634 int status;
1635
1636 status = nfs4_run_open_task(data, 0);
1637 if (!data->rpc_done)
1638 return status;
1639 if (status != 0) {
1640 if (status == -NFS4ERR_BADNAME &&
1641 !(o_arg->open_flags & O_CREAT))
1642 return -ENOENT;
1643 return status;
1644 }
1645
1646 nfs_fattr_map_and_free_names(server, &data->f_attr);
1647
1648 if (o_arg->open_flags & O_CREAT) {
1649 update_changeattr(dir, &o_res->cinfo);
1650 nfs_post_op_update_inode(dir, o_res->dir_attr);
1651 } else
1652 nfs_refresh_inode(dir, o_res->dir_attr);
1653 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1654 server->caps &= ~NFS_CAP_POSIX_LOCK;
1655 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1656 status = _nfs4_proc_open_confirm(data);
1657 if (status != 0)
1658 return status;
1659 }
1660 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1661 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1662 return 0;
1663}
1664
1665static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1666{
1667 unsigned int loop;
1668 int ret;
1669
1670 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1671 ret = nfs4_wait_clnt_recover(clp);
1672 if (ret != 0)
1673 break;
1674 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1675 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1676 break;
1677 nfs4_schedule_state_manager(clp);
1678 ret = -EIO;
1679 }
1680 return ret;
1681}
1682
1683static int nfs4_recover_expired_lease(struct nfs_server *server)
1684{
1685 return nfs4_client_recover_expired_lease(server->nfs_client);
1686}
1687
1688/*
1689 * OPEN_EXPIRED:
1690 * reclaim state on the server after a network partition.
1691 * Assumes caller holds the appropriate lock
1692 */
1693static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1694{
1695 struct nfs4_opendata *opendata;
1696 int ret;
1697
1698 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1699 if (IS_ERR(opendata))
1700 return PTR_ERR(opendata);
1701 ret = nfs4_open_recover(opendata, state);
1702 if (ret == -ESTALE)
1703 d_drop(ctx->dentry);
1704 nfs4_opendata_put(opendata);
1705 return ret;
1706}
1707
1708static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1709{
1710 struct nfs_server *server = NFS_SERVER(state->inode);
1711 struct nfs4_exception exception = { };
1712 int err;
1713
1714 do {
1715 err = _nfs4_open_expired(ctx, state);
1716 switch (err) {
1717 default:
1718 goto out;
1719 case -NFS4ERR_GRACE:
1720 case -NFS4ERR_DELAY:
1721 nfs4_handle_exception(server, err, &exception);
1722 err = 0;
1723 }
1724 } while (exception.retry);
1725out:
1726 return err;
1727}
1728
1729static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1730{
1731 struct nfs_open_context *ctx;
1732 int ret;
1733
1734 ctx = nfs4_state_find_open_context(state);
1735 if (IS_ERR(ctx))
1736 return PTR_ERR(ctx);
1737 ret = nfs4_do_open_expired(ctx, state);
1738 put_nfs_open_context(ctx);
1739 return ret;
1740}
1741
1742#if defined(CONFIG_NFS_V4_1)
1743static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1744{
1745 int status = NFS_OK;
1746 struct nfs_server *server = NFS_SERVER(state->inode);
1747
1748 if (state->flags & flags) {
1749 status = nfs41_test_stateid(server, stateid);
1750 if (status != NFS_OK) {
1751 nfs41_free_stateid(server, stateid);
1752 state->flags &= ~flags;
1753 }
1754 }
1755 return status;
1756}
1757
1758static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1759{
1760 int deleg_status, open_status;
1761 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1762 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1763
1764 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1765 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1766
1767 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1768 return NFS_OK;
1769 return nfs4_open_expired(sp, state);
1770}
1771#endif
1772
1773/*
1774 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1775 * fields corresponding to attributes that were used to store the verifier.
1776 * Make sure we clobber those fields in the later setattr call
1777 */
1778static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1779{
1780 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1781 !(sattr->ia_valid & ATTR_ATIME_SET))
1782 sattr->ia_valid |= ATTR_ATIME;
1783
1784 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1785 !(sattr->ia_valid & ATTR_MTIME_SET))
1786 sattr->ia_valid |= ATTR_MTIME;
1787}
1788
1789/*
1790 * Returns a referenced nfs4_state
1791 */
1792static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1793{
1794 struct nfs4_state_owner *sp;
1795 struct nfs4_state *state = NULL;
1796 struct nfs_server *server = NFS_SERVER(dir);
1797 struct nfs4_opendata *opendata;
1798 int status;
1799
1800 /* Protect against reboot recovery conflicts */
1801 status = -ENOMEM;
1802 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1803 if (sp == NULL) {
1804 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1805 goto out_err;
1806 }
1807 status = nfs4_recover_expired_lease(server);
1808 if (status != 0)
1809 goto err_put_state_owner;
1810 if (dentry->d_inode != NULL)
1811 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1812 status = -ENOMEM;
1813 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1814 if (opendata == NULL)
1815 goto err_put_state_owner;
1816
1817 if (dentry->d_inode != NULL)
1818 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1819
1820 status = _nfs4_proc_open(opendata);
1821 if (status != 0)
1822 goto err_opendata_put;
1823
1824 state = nfs4_opendata_to_nfs4_state(opendata);
1825 status = PTR_ERR(state);
1826 if (IS_ERR(state))
1827 goto err_opendata_put;
1828 if (server->caps & NFS_CAP_POSIX_LOCK)
1829 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1830
1831 if (opendata->o_arg.open_flags & O_EXCL) {
1832 nfs4_exclusive_attrset(opendata, sattr);
1833
1834 nfs_fattr_init(opendata->o_res.f_attr);
1835 status = nfs4_do_setattr(state->inode, cred,
1836 opendata->o_res.f_attr, sattr,
1837 state);
1838 if (status == 0)
1839 nfs_setattr_update_inode(state->inode, sattr);
1840 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1841 }
1842 nfs4_opendata_put(opendata);
1843 nfs4_put_state_owner(sp);
1844 *res = state;
1845 return 0;
1846err_opendata_put:
1847 nfs4_opendata_put(opendata);
1848err_put_state_owner:
1849 nfs4_put_state_owner(sp);
1850out_err:
1851 *res = NULL;
1852 return status;
1853}
1854
1855
1856static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1857{
1858 struct nfs4_exception exception = { };
1859 struct nfs4_state *res;
1860 int status;
1861
1862 do {
1863 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1864 if (status == 0)
1865 break;
1866 /* NOTE: BAD_SEQID means the server and client disagree about the
1867 * book-keeping w.r.t. state-changing operations
1868 * (OPEN/CLOSE/LOCK/LOCKU...)
1869 * It is actually a sign of a bug on the client or on the server.
1870 *
1871 * If we receive a BAD_SEQID error in the particular case of
1872 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1873 * have unhashed the old state_owner for us, and that we can
1874 * therefore safely retry using a new one. We should still warn
1875 * the user though...
1876 */
1877 if (status == -NFS4ERR_BAD_SEQID) {
1878 pr_warn_ratelimited("NFS: v4 server %s "
1879 " returned a bad sequence-id error!\n",
1880 NFS_SERVER(dir)->nfs_client->cl_hostname);
1881 exception.retry = 1;
1882 continue;
1883 }
1884 /*
1885 * BAD_STATEID on OPEN means that the server cancelled our
1886 * state before it received the OPEN_CONFIRM.
1887 * Recover by retrying the request as per the discussion
1888 * on Page 181 of RFC3530.
1889 */
1890 if (status == -NFS4ERR_BAD_STATEID) {
1891 exception.retry = 1;
1892 continue;
1893 }
1894 if (status == -EAGAIN) {
1895 /* We must have found a delegation */
1896 exception.retry = 1;
1897 continue;
1898 }
1899 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1900 status, &exception));
1901 } while (exception.retry);
1902 return res;
1903}
1904
1905static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1906 struct nfs_fattr *fattr, struct iattr *sattr,
1907 struct nfs4_state *state)
1908{
1909 struct nfs_server *server = NFS_SERVER(inode);
1910 struct nfs_setattrargs arg = {
1911 .fh = NFS_FH(inode),
1912 .iap = sattr,
1913 .server = server,
1914 .bitmask = server->attr_bitmask,
1915 };
1916 struct nfs_setattrres res = {
1917 .fattr = fattr,
1918 .server = server,
1919 };
1920 struct rpc_message msg = {
1921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1922 .rpc_argp = &arg,
1923 .rpc_resp = &res,
1924 .rpc_cred = cred,
1925 };
1926 unsigned long timestamp = jiffies;
1927 int status;
1928
1929 nfs_fattr_init(fattr);
1930
1931 if (state != NULL) {
1932 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1933 current->files, current->tgid);
1934 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1935 FMODE_WRITE)) {
1936 /* Use that stateid */
1937 } else
1938 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1939
1940 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1941 if (status == 0 && state != NULL)
1942 renew_lease(server, timestamp);
1943 return status;
1944}
1945
1946static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1947 struct nfs_fattr *fattr, struct iattr *sattr,
1948 struct nfs4_state *state)
1949{
1950 struct nfs_server *server = NFS_SERVER(inode);
1951 struct nfs4_exception exception = {
1952 .state = state,
1953 .inode = inode,
1954 };
1955 int err;
1956 do {
1957 err = nfs4_handle_exception(server,
1958 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1959 &exception);
1960 } while (exception.retry);
1961 return err;
1962}
1963
1964struct nfs4_closedata {
1965 struct inode *inode;
1966 struct nfs4_state *state;
1967 struct nfs_closeargs arg;
1968 struct nfs_closeres res;
1969 struct nfs_fattr fattr;
1970 unsigned long timestamp;
1971 bool roc;
1972 u32 roc_barrier;
1973};
1974
1975static void nfs4_free_closedata(void *data)
1976{
1977 struct nfs4_closedata *calldata = data;
1978 struct nfs4_state_owner *sp = calldata->state->owner;
1979 struct super_block *sb = calldata->state->inode->i_sb;
1980
1981 if (calldata->roc)
1982 pnfs_roc_release(calldata->state->inode);
1983 nfs4_put_open_state(calldata->state);
1984 nfs_free_seqid(calldata->arg.seqid);
1985 nfs4_put_state_owner(sp);
1986 nfs_sb_deactive(sb);
1987 kfree(calldata);
1988}
1989
1990static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1991 fmode_t fmode)
1992{
1993 spin_lock(&state->owner->so_lock);
1994 if (!(fmode & FMODE_READ))
1995 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1996 if (!(fmode & FMODE_WRITE))
1997 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1998 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1999 spin_unlock(&state->owner->so_lock);
2000}
2001
2002static void nfs4_close_done(struct rpc_task *task, void *data)
2003{
2004 struct nfs4_closedata *calldata = data;
2005 struct nfs4_state *state = calldata->state;
2006 struct nfs_server *server = NFS_SERVER(calldata->inode);
2007
2008 dprintk("%s: begin!\n", __func__);
2009 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2010 return;
2011 /* hmm. we are done with the inode, and in the process of freeing
2012 * the state_owner. we keep this around to process errors
2013 */
2014 switch (task->tk_status) {
2015 case 0:
2016 if (calldata->roc)
2017 pnfs_roc_set_barrier(state->inode,
2018 calldata->roc_barrier);
2019 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2020 renew_lease(server, calldata->timestamp);
2021 nfs4_close_clear_stateid_flags(state,
2022 calldata->arg.fmode);
2023 break;
2024 case -NFS4ERR_STALE_STATEID:
2025 case -NFS4ERR_OLD_STATEID:
2026 case -NFS4ERR_BAD_STATEID:
2027 case -NFS4ERR_EXPIRED:
2028 if (calldata->arg.fmode == 0)
2029 break;
2030 default:
2031 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2032 rpc_restart_call_prepare(task);
2033 }
2034 nfs_release_seqid(calldata->arg.seqid);
2035 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2036 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2037}
2038
2039static void nfs4_close_prepare(struct rpc_task *task, void *data)
2040{
2041 struct nfs4_closedata *calldata = data;
2042 struct nfs4_state *state = calldata->state;
2043 int call_close = 0;
2044
2045 dprintk("%s: begin!\n", __func__);
2046 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2047 return;
2048
2049 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2050 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2051 spin_lock(&state->owner->so_lock);
2052 /* Calculate the change in open mode */
2053 if (state->n_rdwr == 0) {
2054 if (state->n_rdonly == 0) {
2055 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2056 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2057 calldata->arg.fmode &= ~FMODE_READ;
2058 }
2059 if (state->n_wronly == 0) {
2060 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2061 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2062 calldata->arg.fmode &= ~FMODE_WRITE;
2063 }
2064 }
2065 spin_unlock(&state->owner->so_lock);
2066
2067 if (!call_close) {
2068 /* Note: exit _without_ calling nfs4_close_done */
2069 task->tk_action = NULL;
2070 goto out;
2071 }
2072
2073 if (calldata->arg.fmode == 0) {
2074 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2075 if (calldata->roc &&
2076 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2077 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2078 task, NULL);
2079 goto out;
2080 }
2081 }
2082
2083 nfs_fattr_init(calldata->res.fattr);
2084 calldata->timestamp = jiffies;
2085 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2086 &calldata->arg.seq_args,
2087 &calldata->res.seq_res,
2088 task))
2089 goto out;
2090 rpc_call_start(task);
2091out:
2092 dprintk("%s: done!\n", __func__);
2093}
2094
2095static const struct rpc_call_ops nfs4_close_ops = {
2096 .rpc_call_prepare = nfs4_close_prepare,
2097 .rpc_call_done = nfs4_close_done,
2098 .rpc_release = nfs4_free_closedata,
2099};
2100
2101/*
2102 * It is possible for data to be read/written from a mem-mapped file
2103 * after the sys_close call (which hits the vfs layer as a flush).
2104 * This means that we can't safely call nfsv4 close on a file until
2105 * the inode is cleared. This in turn means that we are not good
2106 * NFSv4 citizens - we do not indicate to the server to update the file's
2107 * share state even when we are done with one of the three share
2108 * stateid's in the inode.
2109 *
2110 * NOTE: Caller must be holding the sp->so_owner semaphore!
2111 */
2112int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2113{
2114 struct nfs_server *server = NFS_SERVER(state->inode);
2115 struct nfs4_closedata *calldata;
2116 struct nfs4_state_owner *sp = state->owner;
2117 struct rpc_task *task;
2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2120 .rpc_cred = state->owner->so_cred,
2121 };
2122 struct rpc_task_setup task_setup_data = {
2123 .rpc_client = server->client,
2124 .rpc_message = &msg,
2125 .callback_ops = &nfs4_close_ops,
2126 .workqueue = nfsiod_workqueue,
2127 .flags = RPC_TASK_ASYNC,
2128 };
2129 int status = -ENOMEM;
2130
2131 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2132 if (calldata == NULL)
2133 goto out;
2134 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2135 calldata->inode = state->inode;
2136 calldata->state = state;
2137 calldata->arg.fh = NFS_FH(state->inode);
2138 calldata->arg.stateid = &state->open_stateid;
2139 /* Serialization for the sequence id */
2140 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2141 if (calldata->arg.seqid == NULL)
2142 goto out_free_calldata;
2143 calldata->arg.fmode = 0;
2144 calldata->arg.bitmask = server->cache_consistency_bitmask;
2145 calldata->res.fattr = &calldata->fattr;
2146 calldata->res.seqid = calldata->arg.seqid;
2147 calldata->res.server = server;
2148 calldata->roc = roc;
2149 nfs_sb_active(calldata->inode->i_sb);
2150
2151 msg.rpc_argp = &calldata->arg;
2152 msg.rpc_resp = &calldata->res;
2153 task_setup_data.callback_data = calldata;
2154 task = rpc_run_task(&task_setup_data);
2155 if (IS_ERR(task))
2156 return PTR_ERR(task);
2157 status = 0;
2158 if (wait)
2159 status = rpc_wait_for_completion_task(task);
2160 rpc_put_task(task);
2161 return status;
2162out_free_calldata:
2163 kfree(calldata);
2164out:
2165 if (roc)
2166 pnfs_roc_release(state->inode);
2167 nfs4_put_open_state(state);
2168 nfs4_put_state_owner(sp);
2169 return status;
2170}
2171
2172static struct inode *
2173nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2174{
2175 struct nfs4_state *state;
2176
2177 /* Protect against concurrent sillydeletes */
2178 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2179 if (IS_ERR(state))
2180 return ERR_CAST(state);
2181 ctx->state = state;
2182 return igrab(state->inode);
2183}
2184
2185static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2186{
2187 if (ctx->state == NULL)
2188 return;
2189 if (is_sync)
2190 nfs4_close_sync(ctx->state, ctx->mode);
2191 else
2192 nfs4_close_state(ctx->state, ctx->mode);
2193}
2194
2195static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2196{
2197 struct nfs4_server_caps_arg args = {
2198 .fhandle = fhandle,
2199 };
2200 struct nfs4_server_caps_res res = {};
2201 struct rpc_message msg = {
2202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2203 .rpc_argp = &args,
2204 .rpc_resp = &res,
2205 };
2206 int status;
2207
2208 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2209 if (status == 0) {
2210 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2211 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2212 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2213 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2214 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2215 NFS_CAP_CTIME|NFS_CAP_MTIME);
2216 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2217 server->caps |= NFS_CAP_ACLS;
2218 if (res.has_links != 0)
2219 server->caps |= NFS_CAP_HARDLINKS;
2220 if (res.has_symlinks != 0)
2221 server->caps |= NFS_CAP_SYMLINKS;
2222 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2223 server->caps |= NFS_CAP_FILEID;
2224 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2225 server->caps |= NFS_CAP_MODE;
2226 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2227 server->caps |= NFS_CAP_NLINK;
2228 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2229 server->caps |= NFS_CAP_OWNER;
2230 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2231 server->caps |= NFS_CAP_OWNER_GROUP;
2232 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2233 server->caps |= NFS_CAP_ATIME;
2234 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2235 server->caps |= NFS_CAP_CTIME;
2236 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2237 server->caps |= NFS_CAP_MTIME;
2238
2239 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2240 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2241 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2242 server->acl_bitmask = res.acl_bitmask;
2243 server->fh_expire_type = res.fh_expire_type;
2244 }
2245
2246 return status;
2247}
2248
2249int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2250{
2251 struct nfs4_exception exception = { };
2252 int err;
2253 do {
2254 err = nfs4_handle_exception(server,
2255 _nfs4_server_capabilities(server, fhandle),
2256 &exception);
2257 } while (exception.retry);
2258 return err;
2259}
2260
2261static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2262 struct nfs_fsinfo *info)
2263{
2264 struct nfs4_lookup_root_arg args = {
2265 .bitmask = nfs4_fattr_bitmap,
2266 };
2267 struct nfs4_lookup_res res = {
2268 .server = server,
2269 .fattr = info->fattr,
2270 .fh = fhandle,
2271 };
2272 struct rpc_message msg = {
2273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2274 .rpc_argp = &args,
2275 .rpc_resp = &res,
2276 };
2277
2278 nfs_fattr_init(info->fattr);
2279 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2280}
2281
2282static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2283 struct nfs_fsinfo *info)
2284{
2285 struct nfs4_exception exception = { };
2286 int err;
2287 do {
2288 err = _nfs4_lookup_root(server, fhandle, info);
2289 switch (err) {
2290 case 0:
2291 case -NFS4ERR_WRONGSEC:
2292 goto out;
2293 default:
2294 err = nfs4_handle_exception(server, err, &exception);
2295 }
2296 } while (exception.retry);
2297out:
2298 return err;
2299}
2300
2301static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2302 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2303{
2304 struct rpc_auth *auth;
2305 int ret;
2306
2307 auth = rpcauth_create(flavor, server->client);
2308 if (!auth) {
2309 ret = -EIO;
2310 goto out;
2311 }
2312 ret = nfs4_lookup_root(server, fhandle, info);
2313out:
2314 return ret;
2315}
2316
2317static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2318 struct nfs_fsinfo *info)
2319{
2320 int i, len, status = 0;
2321 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2322
2323 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2324 flav_array[len] = RPC_AUTH_NULL;
2325 len += 1;
2326
2327 for (i = 0; i < len; i++) {
2328 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2329 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2330 continue;
2331 break;
2332 }
2333 /*
2334 * -EACCESS could mean that the user doesn't have correct permissions
2335 * to access the mount. It could also mean that we tried to mount
2336 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2337 * existing mount programs don't handle -EACCES very well so it should
2338 * be mapped to -EPERM instead.
2339 */
2340 if (status == -EACCES)
2341 status = -EPERM;
2342 return status;
2343}
2344
2345/*
2346 * get the file handle for the "/" directory on the server
2347 */
2348static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *info)
2350{
2351 int minor_version = server->nfs_client->cl_minorversion;
2352 int status = nfs4_lookup_root(server, fhandle, info);
2353 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2354 /*
2355 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2356 * by nfs4_map_errors() as this function exits.
2357 */
2358 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2359 if (status == 0)
2360 status = nfs4_server_capabilities(server, fhandle);
2361 if (status == 0)
2362 status = nfs4_do_fsinfo(server, fhandle, info);
2363 return nfs4_map_errors(status);
2364}
2365
2366/*
2367 * Get locations and (maybe) other attributes of a referral.
2368 * Note that we'll actually follow the referral later when
2369 * we detect fsid mismatch in inode revalidation
2370 */
2371static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2372 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2373{
2374 int status = -ENOMEM;
2375 struct page *page = NULL;
2376 struct nfs4_fs_locations *locations = NULL;
2377
2378 page = alloc_page(GFP_KERNEL);
2379 if (page == NULL)
2380 goto out;
2381 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2382 if (locations == NULL)
2383 goto out;
2384
2385 status = nfs4_proc_fs_locations(dir, name, locations, page);
2386 if (status != 0)
2387 goto out;
2388 /* Make sure server returned a different fsid for the referral */
2389 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2390 dprintk("%s: server did not return a different fsid for"
2391 " a referral at %s\n", __func__, name->name);
2392 status = -EIO;
2393 goto out;
2394 }
2395 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2396 nfs_fixup_referral_attributes(&locations->fattr);
2397
2398 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2399 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2400 memset(fhandle, 0, sizeof(struct nfs_fh));
2401out:
2402 if (page)
2403 __free_page(page);
2404 kfree(locations);
2405 return status;
2406}
2407
2408static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2409{
2410 struct nfs4_getattr_arg args = {
2411 .fh = fhandle,
2412 .bitmask = server->attr_bitmask,
2413 };
2414 struct nfs4_getattr_res res = {
2415 .fattr = fattr,
2416 .server = server,
2417 };
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2420 .rpc_argp = &args,
2421 .rpc_resp = &res,
2422 };
2423
2424 nfs_fattr_init(fattr);
2425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2426}
2427
2428static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2429{
2430 struct nfs4_exception exception = { };
2431 int err;
2432 do {
2433 err = nfs4_handle_exception(server,
2434 _nfs4_proc_getattr(server, fhandle, fattr),
2435 &exception);
2436 } while (exception.retry);
2437 return err;
2438}
2439
2440/*
2441 * The file is not closed if it is opened due to the a request to change
2442 * the size of the file. The open call will not be needed once the
2443 * VFS layer lookup-intents are implemented.
2444 *
2445 * Close is called when the inode is destroyed.
2446 * If we haven't opened the file for O_WRONLY, we
2447 * need to in the size_change case to obtain a stateid.
2448 *
2449 * Got race?
2450 * Because OPEN is always done by name in nfsv4, it is
2451 * possible that we opened a different file by the same
2452 * name. We can recognize this race condition, but we
2453 * can't do anything about it besides returning an error.
2454 *
2455 * This will be fixed with VFS changes (lookup-intent).
2456 */
2457static int
2458nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2459 struct iattr *sattr)
2460{
2461 struct inode *inode = dentry->d_inode;
2462 struct rpc_cred *cred = NULL;
2463 struct nfs4_state *state = NULL;
2464 int status;
2465
2466 if (pnfs_ld_layoutret_on_setattr(inode))
2467 pnfs_return_layout(inode);
2468
2469 nfs_fattr_init(fattr);
2470
2471 /* Search for an existing open(O_WRITE) file */
2472 if (sattr->ia_valid & ATTR_FILE) {
2473 struct nfs_open_context *ctx;
2474
2475 ctx = nfs_file_open_context(sattr->ia_file);
2476 if (ctx) {
2477 cred = ctx->cred;
2478 state = ctx->state;
2479 }
2480 }
2481
2482 /* Deal with open(O_TRUNC) */
2483 if (sattr->ia_valid & ATTR_OPEN)
2484 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2485
2486 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2487 if (status == 0)
2488 nfs_setattr_update_inode(inode, sattr);
2489 return status;
2490}
2491
2492static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2493 const struct qstr *name, struct nfs_fh *fhandle,
2494 struct nfs_fattr *fattr)
2495{
2496 struct nfs_server *server = NFS_SERVER(dir);
2497 int status;
2498 struct nfs4_lookup_arg args = {
2499 .bitmask = server->attr_bitmask,
2500 .dir_fh = NFS_FH(dir),
2501 .name = name,
2502 };
2503 struct nfs4_lookup_res res = {
2504 .server = server,
2505 .fattr = fattr,
2506 .fh = fhandle,
2507 };
2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2510 .rpc_argp = &args,
2511 .rpc_resp = &res,
2512 };
2513
2514 nfs_fattr_init(fattr);
2515
2516 dprintk("NFS call lookup %s\n", name->name);
2517 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2518 dprintk("NFS reply lookup: %d\n", status);
2519 return status;
2520}
2521
2522void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2523{
2524 memset(fh, 0, sizeof(struct nfs_fh));
2525 fattr->fsid.major = 1;
2526 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2527 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2528 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2529 fattr->nlink = 2;
2530}
2531
2532static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2533 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2534{
2535 struct nfs4_exception exception = { };
2536 int err;
2537 do {
2538 int status;
2539
2540 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2541 switch (status) {
2542 case -NFS4ERR_BADNAME:
2543 return -ENOENT;
2544 case -NFS4ERR_MOVED:
2545 return nfs4_get_referral(dir, name, fattr, fhandle);
2546 case -NFS4ERR_WRONGSEC:
2547 nfs_fixup_secinfo_attributes(fattr, fhandle);
2548 }
2549 err = nfs4_handle_exception(NFS_SERVER(dir),
2550 status, &exception);
2551 } while (exception.retry);
2552 return err;
2553}
2554
2555static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2556{
2557 struct nfs_server *server = NFS_SERVER(inode);
2558 struct nfs4_accessargs args = {
2559 .fh = NFS_FH(inode),
2560 .bitmask = server->cache_consistency_bitmask,
2561 };
2562 struct nfs4_accessres res = {
2563 .server = server,
2564 };
2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2567 .rpc_argp = &args,
2568 .rpc_resp = &res,
2569 .rpc_cred = entry->cred,
2570 };
2571 int mode = entry->mask;
2572 int status;
2573
2574 /*
2575 * Determine which access bits we want to ask for...
2576 */
2577 if (mode & MAY_READ)
2578 args.access |= NFS4_ACCESS_READ;
2579 if (S_ISDIR(inode->i_mode)) {
2580 if (mode & MAY_WRITE)
2581 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2582 if (mode & MAY_EXEC)
2583 args.access |= NFS4_ACCESS_LOOKUP;
2584 } else {
2585 if (mode & MAY_WRITE)
2586 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2587 if (mode & MAY_EXEC)
2588 args.access |= NFS4_ACCESS_EXECUTE;
2589 }
2590
2591 res.fattr = nfs_alloc_fattr();
2592 if (res.fattr == NULL)
2593 return -ENOMEM;
2594
2595 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2596 if (!status) {
2597 entry->mask = 0;
2598 if (res.access & NFS4_ACCESS_READ)
2599 entry->mask |= MAY_READ;
2600 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2601 entry->mask |= MAY_WRITE;
2602 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2603 entry->mask |= MAY_EXEC;
2604 nfs_refresh_inode(inode, res.fattr);
2605 }
2606 nfs_free_fattr(res.fattr);
2607 return status;
2608}
2609
2610static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2611{
2612 struct nfs4_exception exception = { };
2613 int err;
2614 do {
2615 err = nfs4_handle_exception(NFS_SERVER(inode),
2616 _nfs4_proc_access(inode, entry),
2617 &exception);
2618 } while (exception.retry);
2619 return err;
2620}
2621
2622/*
2623 * TODO: For the time being, we don't try to get any attributes
2624 * along with any of the zero-copy operations READ, READDIR,
2625 * READLINK, WRITE.
2626 *
2627 * In the case of the first three, we want to put the GETATTR
2628 * after the read-type operation -- this is because it is hard
2629 * to predict the length of a GETATTR response in v4, and thus
2630 * align the READ data correctly. This means that the GETATTR
2631 * may end up partially falling into the page cache, and we should
2632 * shift it into the 'tail' of the xdr_buf before processing.
2633 * To do this efficiently, we need to know the total length
2634 * of data received, which doesn't seem to be available outside
2635 * of the RPC layer.
2636 *
2637 * In the case of WRITE, we also want to put the GETATTR after
2638 * the operation -- in this case because we want to make sure
2639 * we get the post-operation mtime and size. This means that
2640 * we can't use xdr_encode_pages() as written: we need a variant
2641 * of it which would leave room in the 'tail' iovec.
2642 *
2643 * Both of these changes to the XDR layer would in fact be quite
2644 * minor, but I decided to leave them for a subsequent patch.
2645 */
2646static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2647 unsigned int pgbase, unsigned int pglen)
2648{
2649 struct nfs4_readlink args = {
2650 .fh = NFS_FH(inode),
2651 .pgbase = pgbase,
2652 .pglen = pglen,
2653 .pages = &page,
2654 };
2655 struct nfs4_readlink_res res;
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2658 .rpc_argp = &args,
2659 .rpc_resp = &res,
2660 };
2661
2662 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2663}
2664
2665static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2666 unsigned int pgbase, unsigned int pglen)
2667{
2668 struct nfs4_exception exception = { };
2669 int err;
2670 do {
2671 err = nfs4_handle_exception(NFS_SERVER(inode),
2672 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2673 &exception);
2674 } while (exception.retry);
2675 return err;
2676}
2677
2678/*
2679 * Got race?
2680 * We will need to arrange for the VFS layer to provide an atomic open.
2681 * Until then, this create/open method is prone to inefficiency and race
2682 * conditions due to the lookup, create, and open VFS calls from sys_open()
2683 * placed on the wire.
2684 *
2685 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2686 * The file will be opened again in the subsequent VFS open call
2687 * (nfs4_proc_file_open).
2688 *
2689 * The open for read will just hang around to be used by any process that
2690 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2691 */
2692
2693static int
2694nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2695 int flags, struct nfs_open_context *ctx)
2696{
2697 struct dentry *de = dentry;
2698 struct nfs4_state *state;
2699 struct rpc_cred *cred = NULL;
2700 fmode_t fmode = 0;
2701 int status = 0;
2702
2703 if (ctx != NULL) {
2704 cred = ctx->cred;
2705 de = ctx->dentry;
2706 fmode = ctx->mode;
2707 }
2708 sattr->ia_mode &= ~current_umask();
2709 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2710 d_drop(dentry);
2711 if (IS_ERR(state)) {
2712 status = PTR_ERR(state);
2713 goto out;
2714 }
2715 d_add(dentry, igrab(state->inode));
2716 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2717 if (ctx != NULL)
2718 ctx->state = state;
2719 else
2720 nfs4_close_sync(state, fmode);
2721out:
2722 return status;
2723}
2724
2725static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2726{
2727 struct nfs_server *server = NFS_SERVER(dir);
2728 struct nfs_removeargs args = {
2729 .fh = NFS_FH(dir),
2730 .name.len = name->len,
2731 .name.name = name->name,
2732 .bitmask = server->attr_bitmask,
2733 };
2734 struct nfs_removeres res = {
2735 .server = server,
2736 };
2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2739 .rpc_argp = &args,
2740 .rpc_resp = &res,
2741 };
2742 int status = -ENOMEM;
2743
2744 res.dir_attr = nfs_alloc_fattr();
2745 if (res.dir_attr == NULL)
2746 goto out;
2747
2748 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2749 if (status == 0) {
2750 update_changeattr(dir, &res.cinfo);
2751 nfs_post_op_update_inode(dir, res.dir_attr);
2752 }
2753 nfs_free_fattr(res.dir_attr);
2754out:
2755 return status;
2756}
2757
2758static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2759{
2760 struct nfs4_exception exception = { };
2761 int err;
2762 do {
2763 err = nfs4_handle_exception(NFS_SERVER(dir),
2764 _nfs4_proc_remove(dir, name),
2765 &exception);
2766 } while (exception.retry);
2767 return err;
2768}
2769
2770static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2771{
2772 struct nfs_server *server = NFS_SERVER(dir);
2773 struct nfs_removeargs *args = msg->rpc_argp;
2774 struct nfs_removeres *res = msg->rpc_resp;
2775
2776 args->bitmask = server->cache_consistency_bitmask;
2777 res->server = server;
2778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2779 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2780}
2781
2782static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2783{
2784 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2785 &data->args.seq_args,
2786 &data->res.seq_res,
2787 task))
2788 return;
2789 rpc_call_start(task);
2790}
2791
2792static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2793{
2794 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2795
2796 if (!nfs4_sequence_done(task, &res->seq_res))
2797 return 0;
2798 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2799 return 0;
2800 update_changeattr(dir, &res->cinfo);
2801 nfs_post_op_update_inode(dir, res->dir_attr);
2802 return 1;
2803}
2804
2805static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2806{
2807 struct nfs_server *server = NFS_SERVER(dir);
2808 struct nfs_renameargs *arg = msg->rpc_argp;
2809 struct nfs_renameres *res = msg->rpc_resp;
2810
2811 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2812 arg->bitmask = server->attr_bitmask;
2813 res->server = server;
2814 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2815}
2816
2817static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2818{
2819 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2820 &data->args.seq_args,
2821 &data->res.seq_res,
2822 task))
2823 return;
2824 rpc_call_start(task);
2825}
2826
2827static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2828 struct inode *new_dir)
2829{
2830 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2831
2832 if (!nfs4_sequence_done(task, &res->seq_res))
2833 return 0;
2834 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2835 return 0;
2836
2837 update_changeattr(old_dir, &res->old_cinfo);
2838 nfs_post_op_update_inode(old_dir, res->old_fattr);
2839 update_changeattr(new_dir, &res->new_cinfo);
2840 nfs_post_op_update_inode(new_dir, res->new_fattr);
2841 return 1;
2842}
2843
2844static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2845 struct inode *new_dir, struct qstr *new_name)
2846{
2847 struct nfs_server *server = NFS_SERVER(old_dir);
2848 struct nfs_renameargs arg = {
2849 .old_dir = NFS_FH(old_dir),
2850 .new_dir = NFS_FH(new_dir),
2851 .old_name = old_name,
2852 .new_name = new_name,
2853 .bitmask = server->attr_bitmask,
2854 };
2855 struct nfs_renameres res = {
2856 .server = server,
2857 };
2858 struct rpc_message msg = {
2859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2860 .rpc_argp = &arg,
2861 .rpc_resp = &res,
2862 };
2863 int status = -ENOMEM;
2864
2865 res.old_fattr = nfs_alloc_fattr();
2866 res.new_fattr = nfs_alloc_fattr();
2867 if (res.old_fattr == NULL || res.new_fattr == NULL)
2868 goto out;
2869
2870 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2871 if (!status) {
2872 update_changeattr(old_dir, &res.old_cinfo);
2873 nfs_post_op_update_inode(old_dir, res.old_fattr);
2874 update_changeattr(new_dir, &res.new_cinfo);
2875 nfs_post_op_update_inode(new_dir, res.new_fattr);
2876 }
2877out:
2878 nfs_free_fattr(res.new_fattr);
2879 nfs_free_fattr(res.old_fattr);
2880 return status;
2881}
2882
2883static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2884 struct inode *new_dir, struct qstr *new_name)
2885{
2886 struct nfs4_exception exception = { };
2887 int err;
2888 do {
2889 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2890 _nfs4_proc_rename(old_dir, old_name,
2891 new_dir, new_name),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2898{
2899 struct nfs_server *server = NFS_SERVER(inode);
2900 struct nfs4_link_arg arg = {
2901 .fh = NFS_FH(inode),
2902 .dir_fh = NFS_FH(dir),
2903 .name = name,
2904 .bitmask = server->attr_bitmask,
2905 };
2906 struct nfs4_link_res res = {
2907 .server = server,
2908 };
2909 struct rpc_message msg = {
2910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2911 .rpc_argp = &arg,
2912 .rpc_resp = &res,
2913 };
2914 int status = -ENOMEM;
2915
2916 res.fattr = nfs_alloc_fattr();
2917 res.dir_attr = nfs_alloc_fattr();
2918 if (res.fattr == NULL || res.dir_attr == NULL)
2919 goto out;
2920
2921 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2922 if (!status) {
2923 update_changeattr(dir, &res.cinfo);
2924 nfs_post_op_update_inode(dir, res.dir_attr);
2925 nfs_post_op_update_inode(inode, res.fattr);
2926 }
2927out:
2928 nfs_free_fattr(res.dir_attr);
2929 nfs_free_fattr(res.fattr);
2930 return status;
2931}
2932
2933static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2934{
2935 struct nfs4_exception exception = { };
2936 int err;
2937 do {
2938 err = nfs4_handle_exception(NFS_SERVER(inode),
2939 _nfs4_proc_link(inode, dir, name),
2940 &exception);
2941 } while (exception.retry);
2942 return err;
2943}
2944
2945struct nfs4_createdata {
2946 struct rpc_message msg;
2947 struct nfs4_create_arg arg;
2948 struct nfs4_create_res res;
2949 struct nfs_fh fh;
2950 struct nfs_fattr fattr;
2951 struct nfs_fattr dir_fattr;
2952};
2953
2954static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2955 struct qstr *name, struct iattr *sattr, u32 ftype)
2956{
2957 struct nfs4_createdata *data;
2958
2959 data = kzalloc(sizeof(*data), GFP_KERNEL);
2960 if (data != NULL) {
2961 struct nfs_server *server = NFS_SERVER(dir);
2962
2963 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2964 data->msg.rpc_argp = &data->arg;
2965 data->msg.rpc_resp = &data->res;
2966 data->arg.dir_fh = NFS_FH(dir);
2967 data->arg.server = server;
2968 data->arg.name = name;
2969 data->arg.attrs = sattr;
2970 data->arg.ftype = ftype;
2971 data->arg.bitmask = server->attr_bitmask;
2972 data->res.server = server;
2973 data->res.fh = &data->fh;
2974 data->res.fattr = &data->fattr;
2975 data->res.dir_fattr = &data->dir_fattr;
2976 nfs_fattr_init(data->res.fattr);
2977 nfs_fattr_init(data->res.dir_fattr);
2978 }
2979 return data;
2980}
2981
2982static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2983{
2984 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2985 &data->arg.seq_args, &data->res.seq_res, 1);
2986 if (status == 0) {
2987 update_changeattr(dir, &data->res.dir_cinfo);
2988 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2989 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2990 }
2991 return status;
2992}
2993
2994static void nfs4_free_createdata(struct nfs4_createdata *data)
2995{
2996 kfree(data);
2997}
2998
2999static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3000 struct page *page, unsigned int len, struct iattr *sattr)
3001{
3002 struct nfs4_createdata *data;
3003 int status = -ENAMETOOLONG;
3004
3005 if (len > NFS4_MAXPATHLEN)
3006 goto out;
3007
3008 status = -ENOMEM;
3009 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3010 if (data == NULL)
3011 goto out;
3012
3013 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3014 data->arg.u.symlink.pages = &page;
3015 data->arg.u.symlink.len = len;
3016
3017 status = nfs4_do_create(dir, dentry, data);
3018
3019 nfs4_free_createdata(data);
3020out:
3021 return status;
3022}
3023
3024static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3025 struct page *page, unsigned int len, struct iattr *sattr)
3026{
3027 struct nfs4_exception exception = { };
3028 int err;
3029 do {
3030 err = nfs4_handle_exception(NFS_SERVER(dir),
3031 _nfs4_proc_symlink(dir, dentry, page,
3032 len, sattr),
3033 &exception);
3034 } while (exception.retry);
3035 return err;
3036}
3037
3038static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3039 struct iattr *sattr)
3040{
3041 struct nfs4_createdata *data;
3042 int status = -ENOMEM;
3043
3044 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3045 if (data == NULL)
3046 goto out;
3047
3048 status = nfs4_do_create(dir, dentry, data);
3049
3050 nfs4_free_createdata(data);
3051out:
3052 return status;
3053}
3054
3055static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3056 struct iattr *sattr)
3057{
3058 struct nfs4_exception exception = { };
3059 int err;
3060
3061 sattr->ia_mode &= ~current_umask();
3062 do {
3063 err = nfs4_handle_exception(NFS_SERVER(dir),
3064 _nfs4_proc_mkdir(dir, dentry, sattr),
3065 &exception);
3066 } while (exception.retry);
3067 return err;
3068}
3069
3070static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3071 u64 cookie, struct page **pages, unsigned int count, int plus)
3072{
3073 struct inode *dir = dentry->d_inode;
3074 struct nfs4_readdir_arg args = {
3075 .fh = NFS_FH(dir),
3076 .pages = pages,
3077 .pgbase = 0,
3078 .count = count,
3079 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3080 .plus = plus,
3081 };
3082 struct nfs4_readdir_res res;
3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3085 .rpc_argp = &args,
3086 .rpc_resp = &res,
3087 .rpc_cred = cred,
3088 };
3089 int status;
3090
3091 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3092 dentry->d_parent->d_name.name,
3093 dentry->d_name.name,
3094 (unsigned long long)cookie);
3095 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3096 res.pgbase = args.pgbase;
3097 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3098 if (status >= 0) {
3099 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3100 status += args.pgbase;
3101 }
3102
3103 nfs_invalidate_atime(dir);
3104
3105 dprintk("%s: returns %d\n", __func__, status);
3106 return status;
3107}
3108
3109static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3110 u64 cookie, struct page **pages, unsigned int count, int plus)
3111{
3112 struct nfs4_exception exception = { };
3113 int err;
3114 do {
3115 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3116 _nfs4_proc_readdir(dentry, cred, cookie,
3117 pages, count, plus),
3118 &exception);
3119 } while (exception.retry);
3120 return err;
3121}
3122
3123static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3124 struct iattr *sattr, dev_t rdev)
3125{
3126 struct nfs4_createdata *data;
3127 int mode = sattr->ia_mode;
3128 int status = -ENOMEM;
3129
3130 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3131 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3132
3133 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3134 if (data == NULL)
3135 goto out;
3136
3137 if (S_ISFIFO(mode))
3138 data->arg.ftype = NF4FIFO;
3139 else if (S_ISBLK(mode)) {
3140 data->arg.ftype = NF4BLK;
3141 data->arg.u.device.specdata1 = MAJOR(rdev);
3142 data->arg.u.device.specdata2 = MINOR(rdev);
3143 }
3144 else if (S_ISCHR(mode)) {
3145 data->arg.ftype = NF4CHR;
3146 data->arg.u.device.specdata1 = MAJOR(rdev);
3147 data->arg.u.device.specdata2 = MINOR(rdev);
3148 }
3149
3150 status = nfs4_do_create(dir, dentry, data);
3151
3152 nfs4_free_createdata(data);
3153out:
3154 return status;
3155}
3156
3157static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3158 struct iattr *sattr, dev_t rdev)
3159{
3160 struct nfs4_exception exception = { };
3161 int err;
3162
3163 sattr->ia_mode &= ~current_umask();
3164 do {
3165 err = nfs4_handle_exception(NFS_SERVER(dir),
3166 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3167 &exception);
3168 } while (exception.retry);
3169 return err;
3170}
3171
3172static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3173 struct nfs_fsstat *fsstat)
3174{
3175 struct nfs4_statfs_arg args = {
3176 .fh = fhandle,
3177 .bitmask = server->attr_bitmask,
3178 };
3179 struct nfs4_statfs_res res = {
3180 .fsstat = fsstat,
3181 };
3182 struct rpc_message msg = {
3183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3184 .rpc_argp = &args,
3185 .rpc_resp = &res,
3186 };
3187
3188 nfs_fattr_init(fsstat->fattr);
3189 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3190}
3191
3192static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3193{
3194 struct nfs4_exception exception = { };
3195 int err;
3196 do {
3197 err = nfs4_handle_exception(server,
3198 _nfs4_proc_statfs(server, fhandle, fsstat),
3199 &exception);
3200 } while (exception.retry);
3201 return err;
3202}
3203
3204static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3205 struct nfs_fsinfo *fsinfo)
3206{
3207 struct nfs4_fsinfo_arg args = {
3208 .fh = fhandle,
3209 .bitmask = server->attr_bitmask,
3210 };
3211 struct nfs4_fsinfo_res res = {
3212 .fsinfo = fsinfo,
3213 };
3214 struct rpc_message msg = {
3215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3216 .rpc_argp = &args,
3217 .rpc_resp = &res,
3218 };
3219
3220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3221}
3222
3223static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3224{
3225 struct nfs4_exception exception = { };
3226 int err;
3227
3228 do {
3229 err = nfs4_handle_exception(server,
3230 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3231 &exception);
3232 } while (exception.retry);
3233 return err;
3234}
3235
3236static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3237{
3238 nfs_fattr_init(fsinfo->fattr);
3239 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3240}
3241
3242static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3243 struct nfs_pathconf *pathconf)
3244{
3245 struct nfs4_pathconf_arg args = {
3246 .fh = fhandle,
3247 .bitmask = server->attr_bitmask,
3248 };
3249 struct nfs4_pathconf_res res = {
3250 .pathconf = pathconf,
3251 };
3252 struct rpc_message msg = {
3253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3254 .rpc_argp = &args,
3255 .rpc_resp = &res,
3256 };
3257
3258 /* None of the pathconf attributes are mandatory to implement */
3259 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3260 memset(pathconf, 0, sizeof(*pathconf));
3261 return 0;
3262 }
3263
3264 nfs_fattr_init(pathconf->fattr);
3265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3266}
3267
3268static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3269 struct nfs_pathconf *pathconf)
3270{
3271 struct nfs4_exception exception = { };
3272 int err;
3273
3274 do {
3275 err = nfs4_handle_exception(server,
3276 _nfs4_proc_pathconf(server, fhandle, pathconf),
3277 &exception);
3278 } while (exception.retry);
3279 return err;
3280}
3281
3282void __nfs4_read_done_cb(struct nfs_read_data *data)
3283{
3284 nfs_invalidate_atime(data->inode);
3285}
3286
3287static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3288{
3289 struct nfs_server *server = NFS_SERVER(data->inode);
3290
3291 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3292 rpc_restart_call_prepare(task);
3293 return -EAGAIN;
3294 }
3295
3296 __nfs4_read_done_cb(data);
3297 if (task->tk_status > 0)
3298 renew_lease(server, data->timestamp);
3299 return 0;
3300}
3301
3302static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3303{
3304
3305 dprintk("--> %s\n", __func__);
3306
3307 if (!nfs4_sequence_done(task, &data->res.seq_res))
3308 return -EAGAIN;
3309
3310 return data->read_done_cb ? data->read_done_cb(task, data) :
3311 nfs4_read_done_cb(task, data);
3312}
3313
3314static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3315{
3316 data->timestamp = jiffies;
3317 data->read_done_cb = nfs4_read_done_cb;
3318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3319 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3320}
3321
3322static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3323{
3324 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3325 &data->args.seq_args,
3326 &data->res.seq_res,
3327 task))
3328 return;
3329 rpc_call_start(task);
3330}
3331
3332/* Reset the the nfs_read_data to send the read to the MDS. */
3333void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3334{
3335 dprintk("%s Reset task for i/o through\n", __func__);
3336 put_lseg(data->lseg);
3337 data->lseg = NULL;
3338 /* offsets will differ in the dense stripe case */
3339 data->args.offset = data->mds_offset;
3340 data->ds_clp = NULL;
3341 data->args.fh = NFS_FH(data->inode);
3342 data->read_done_cb = nfs4_read_done_cb;
3343 task->tk_ops = data->mds_ops;
3344 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3345}
3346EXPORT_SYMBOL_GPL(nfs4_reset_read);
3347
3348static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3349{
3350 struct inode *inode = data->inode;
3351
3352 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3353 rpc_restart_call_prepare(task);
3354 return -EAGAIN;
3355 }
3356 if (task->tk_status >= 0) {
3357 renew_lease(NFS_SERVER(inode), data->timestamp);
3358 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3359 }
3360 return 0;
3361}
3362
3363static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3364{
3365 if (!nfs4_sequence_done(task, &data->res.seq_res))
3366 return -EAGAIN;
3367 return data->write_done_cb ? data->write_done_cb(task, data) :
3368 nfs4_write_done_cb(task, data);
3369}
3370
3371/* Reset the the nfs_write_data to send the write to the MDS. */
3372void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3373{
3374 dprintk("%s Reset task for i/o through\n", __func__);
3375 put_lseg(data->lseg);
3376 data->lseg = NULL;
3377 data->ds_clp = NULL;
3378 data->write_done_cb = nfs4_write_done_cb;
3379 data->args.fh = NFS_FH(data->inode);
3380 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3381 data->args.offset = data->mds_offset;
3382 data->res.fattr = &data->fattr;
3383 task->tk_ops = data->mds_ops;
3384 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3385}
3386EXPORT_SYMBOL_GPL(nfs4_reset_write);
3387
3388static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3389{
3390 struct nfs_server *server = NFS_SERVER(data->inode);
3391
3392 if (data->lseg) {
3393 data->args.bitmask = NULL;
3394 data->res.fattr = NULL;
3395 } else
3396 data->args.bitmask = server->cache_consistency_bitmask;
3397 if (!data->write_done_cb)
3398 data->write_done_cb = nfs4_write_done_cb;
3399 data->res.server = server;
3400 data->timestamp = jiffies;
3401
3402 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3403 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3404}
3405
3406static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3407{
3408 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3409 &data->args.seq_args,
3410 &data->res.seq_res,
3411 task))
3412 return;
3413 rpc_call_start(task);
3414}
3415
3416static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3417{
3418 struct inode *inode = data->inode;
3419
3420 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3421 rpc_restart_call_prepare(task);
3422 return -EAGAIN;
3423 }
3424 nfs_refresh_inode(inode, data->res.fattr);
3425 return 0;
3426}
3427
3428static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3429{
3430 if (!nfs4_sequence_done(task, &data->res.seq_res))
3431 return -EAGAIN;
3432 return data->write_done_cb(task, data);
3433}
3434
3435static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3436{
3437 struct nfs_server *server = NFS_SERVER(data->inode);
3438
3439 if (data->lseg) {
3440 data->args.bitmask = NULL;
3441 data->res.fattr = NULL;
3442 } else
3443 data->args.bitmask = server->cache_consistency_bitmask;
3444 if (!data->write_done_cb)
3445 data->write_done_cb = nfs4_commit_done_cb;
3446 data->res.server = server;
3447 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3448 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3449}
3450
3451struct nfs4_renewdata {
3452 struct nfs_client *client;
3453 unsigned long timestamp;
3454};
3455
3456/*
3457 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3458 * standalone procedure for queueing an asynchronous RENEW.
3459 */
3460static void nfs4_renew_release(void *calldata)
3461{
3462 struct nfs4_renewdata *data = calldata;
3463 struct nfs_client *clp = data->client;
3464
3465 if (atomic_read(&clp->cl_count) > 1)
3466 nfs4_schedule_state_renewal(clp);
3467 nfs_put_client(clp);
3468 kfree(data);
3469}
3470
3471static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3472{
3473 struct nfs4_renewdata *data = calldata;
3474 struct nfs_client *clp = data->client;
3475 unsigned long timestamp = data->timestamp;
3476
3477 if (task->tk_status < 0) {
3478 /* Unless we're shutting down, schedule state recovery! */
3479 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3480 return;
3481 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3482 nfs4_schedule_lease_recovery(clp);
3483 return;
3484 }
3485 nfs4_schedule_path_down_recovery(clp);
3486 }
3487 do_renew_lease(clp, timestamp);
3488}
3489
3490static const struct rpc_call_ops nfs4_renew_ops = {
3491 .rpc_call_done = nfs4_renew_done,
3492 .rpc_release = nfs4_renew_release,
3493};
3494
3495static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3496{
3497 struct rpc_message msg = {
3498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3499 .rpc_argp = clp,
3500 .rpc_cred = cred,
3501 };
3502 struct nfs4_renewdata *data;
3503
3504 if (renew_flags == 0)
3505 return 0;
3506 if (!atomic_inc_not_zero(&clp->cl_count))
3507 return -EIO;
3508 data = kmalloc(sizeof(*data), GFP_NOFS);
3509 if (data == NULL)
3510 return -ENOMEM;
3511 data->client = clp;
3512 data->timestamp = jiffies;
3513 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3514 &nfs4_renew_ops, data);
3515}
3516
3517static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3518{
3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3521 .rpc_argp = clp,
3522 .rpc_cred = cred,
3523 };
3524 unsigned long now = jiffies;
3525 int status;
3526
3527 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3528 if (status < 0)
3529 return status;
3530 do_renew_lease(clp, now);
3531 return 0;
3532}
3533
3534static inline int nfs4_server_supports_acls(struct nfs_server *server)
3535{
3536 return (server->caps & NFS_CAP_ACLS)
3537 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3538 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3539}
3540
3541/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3542 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3543 * the stack.
3544 */
3545#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3546
3547static int buf_to_pages_noslab(const void *buf, size_t buflen,
3548 struct page **pages, unsigned int *pgbase)
3549{
3550 struct page *newpage, **spages;
3551 int rc = 0;
3552 size_t len;
3553 spages = pages;
3554
3555 do {
3556 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3557 newpage = alloc_page(GFP_KERNEL);
3558
3559 if (newpage == NULL)
3560 goto unwind;
3561 memcpy(page_address(newpage), buf, len);
3562 buf += len;
3563 buflen -= len;
3564 *pages++ = newpage;
3565 rc++;
3566 } while (buflen != 0);
3567
3568 return rc;
3569
3570unwind:
3571 for(; rc > 0; rc--)
3572 __free_page(spages[rc-1]);
3573 return -ENOMEM;
3574}
3575
3576struct nfs4_cached_acl {
3577 int cached;
3578 size_t len;
3579 char data[0];
3580};
3581
3582static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3583{
3584 struct nfs_inode *nfsi = NFS_I(inode);
3585
3586 spin_lock(&inode->i_lock);
3587 kfree(nfsi->nfs4_acl);
3588 nfsi->nfs4_acl = acl;
3589 spin_unlock(&inode->i_lock);
3590}
3591
3592static void nfs4_zap_acl_attr(struct inode *inode)
3593{
3594 nfs4_set_cached_acl(inode, NULL);
3595}
3596
3597static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3598{
3599 struct nfs_inode *nfsi = NFS_I(inode);
3600 struct nfs4_cached_acl *acl;
3601 int ret = -ENOENT;
3602
3603 spin_lock(&inode->i_lock);
3604 acl = nfsi->nfs4_acl;
3605 if (acl == NULL)
3606 goto out;
3607 if (buf == NULL) /* user is just asking for length */
3608 goto out_len;
3609 if (acl->cached == 0)
3610 goto out;
3611 ret = -ERANGE; /* see getxattr(2) man page */
3612 if (acl->len > buflen)
3613 goto out;
3614 memcpy(buf, acl->data, acl->len);
3615out_len:
3616 ret = acl->len;
3617out:
3618 spin_unlock(&inode->i_lock);
3619 return ret;
3620}
3621
3622static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3623{
3624 struct nfs4_cached_acl *acl;
3625
3626 if (buf && acl_len <= PAGE_SIZE) {
3627 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3628 if (acl == NULL)
3629 goto out;
3630 acl->cached = 1;
3631 memcpy(acl->data, buf, acl_len);
3632 } else {
3633 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3634 if (acl == NULL)
3635 goto out;
3636 acl->cached = 0;
3637 }
3638 acl->len = acl_len;
3639out:
3640 nfs4_set_cached_acl(inode, acl);
3641}
3642
3643/*
3644 * The getxattr API returns the required buffer length when called with a
3645 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3646 * the required buf. On a NULL buf, we send a page of data to the server
3647 * guessing that the ACL request can be serviced by a page. If so, we cache
3648 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3649 * the cache. If not so, we throw away the page, and cache the required
3650 * length. The next getxattr call will then produce another round trip to
3651 * the server, this time with the input buf of the required size.
3652 */
3653static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3654{
3655 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3656 struct nfs_getaclargs args = {
3657 .fh = NFS_FH(inode),
3658 .acl_pages = pages,
3659 .acl_len = buflen,
3660 };
3661 struct nfs_getaclres res = {
3662 .acl_len = buflen,
3663 };
3664 void *resp_buf;
3665 struct rpc_message msg = {
3666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3667 .rpc_argp = &args,
3668 .rpc_resp = &res,
3669 };
3670 int ret = -ENOMEM, npages, i, acl_len = 0;
3671
3672 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3673 /* As long as we're doing a round trip to the server anyway,
3674 * let's be prepared for a page of acl data. */
3675 if (npages == 0)
3676 npages = 1;
3677
3678 for (i = 0; i < npages; i++) {
3679 pages[i] = alloc_page(GFP_KERNEL);
3680 if (!pages[i])
3681 goto out_free;
3682 }
3683 if (npages > 1) {
3684 /* for decoding across pages */
3685 res.acl_scratch = alloc_page(GFP_KERNEL);
3686 if (!res.acl_scratch)
3687 goto out_free;
3688 }
3689 args.acl_len = npages * PAGE_SIZE;
3690 args.acl_pgbase = 0;
3691 /* Let decode_getfacl know not to fail if the ACL data is larger than
3692 * the page we send as a guess */
3693 if (buf == NULL)
3694 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3695 resp_buf = page_address(pages[0]);
3696
3697 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3698 __func__, buf, buflen, npages, args.acl_len);
3699 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3700 &msg, &args.seq_args, &res.seq_res, 0);
3701 if (ret)
3702 goto out_free;
3703
3704 acl_len = res.acl_len - res.acl_data_offset;
3705 if (acl_len > args.acl_len)
3706 nfs4_write_cached_acl(inode, NULL, acl_len);
3707 else
3708 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3709 acl_len);
3710 if (buf) {
3711 ret = -ERANGE;
3712 if (acl_len > buflen)
3713 goto out_free;
3714 _copy_from_pages(buf, pages, res.acl_data_offset,
3715 acl_len);
3716 }
3717 ret = acl_len;
3718out_free:
3719 for (i = 0; i < npages; i++)
3720 if (pages[i])
3721 __free_page(pages[i]);
3722 if (res.acl_scratch)
3723 __free_page(res.acl_scratch);
3724 return ret;
3725}
3726
3727static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3728{
3729 struct nfs4_exception exception = { };
3730 ssize_t ret;
3731 do {
3732 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3733 if (ret >= 0)
3734 break;
3735 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3736 } while (exception.retry);
3737 return ret;
3738}
3739
3740static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3741{
3742 struct nfs_server *server = NFS_SERVER(inode);
3743 int ret;
3744
3745 if (!nfs4_server_supports_acls(server))
3746 return -EOPNOTSUPP;
3747 ret = nfs_revalidate_inode(server, inode);
3748 if (ret < 0)
3749 return ret;
3750 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3751 nfs_zap_acl_cache(inode);
3752 ret = nfs4_read_cached_acl(inode, buf, buflen);
3753 if (ret != -ENOENT)
3754 /* -ENOENT is returned if there is no ACL or if there is an ACL
3755 * but no cached acl data, just the acl length */
3756 return ret;
3757 return nfs4_get_acl_uncached(inode, buf, buflen);
3758}
3759
3760static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3761{
3762 struct nfs_server *server = NFS_SERVER(inode);
3763 struct page *pages[NFS4ACL_MAXPAGES];
3764 struct nfs_setaclargs arg = {
3765 .fh = NFS_FH(inode),
3766 .acl_pages = pages,
3767 .acl_len = buflen,
3768 };
3769 struct nfs_setaclres res;
3770 struct rpc_message msg = {
3771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3772 .rpc_argp = &arg,
3773 .rpc_resp = &res,
3774 };
3775 int ret, i;
3776
3777 if (!nfs4_server_supports_acls(server))
3778 return -EOPNOTSUPP;
3779 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3780 if (i < 0)
3781 return i;
3782 nfs_inode_return_delegation(inode);
3783 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3784
3785 /*
3786 * Free each page after tx, so the only ref left is
3787 * held by the network stack
3788 */
3789 for (; i > 0; i--)
3790 put_page(pages[i-1]);
3791
3792 /*
3793 * Acl update can result in inode attribute update.
3794 * so mark the attribute cache invalid.
3795 */
3796 spin_lock(&inode->i_lock);
3797 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3798 spin_unlock(&inode->i_lock);
3799 nfs_access_zap_cache(inode);
3800 nfs_zap_acl_cache(inode);
3801 return ret;
3802}
3803
3804static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3805{
3806 struct nfs4_exception exception = { };
3807 int err;
3808 do {
3809 err = nfs4_handle_exception(NFS_SERVER(inode),
3810 __nfs4_proc_set_acl(inode, buf, buflen),
3811 &exception);
3812 } while (exception.retry);
3813 return err;
3814}
3815
3816static int
3817nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3818{
3819 struct nfs_client *clp = server->nfs_client;
3820
3821 if (task->tk_status >= 0)
3822 return 0;
3823 switch(task->tk_status) {
3824 case -NFS4ERR_DELEG_REVOKED:
3825 case -NFS4ERR_ADMIN_REVOKED:
3826 case -NFS4ERR_BAD_STATEID:
3827 if (state == NULL)
3828 break;
3829 nfs_remove_bad_delegation(state->inode);
3830 case -NFS4ERR_OPENMODE:
3831 if (state == NULL)
3832 break;
3833 nfs4_schedule_stateid_recovery(server, state);
3834 goto wait_on_recovery;
3835 case -NFS4ERR_EXPIRED:
3836 if (state != NULL)
3837 nfs4_schedule_stateid_recovery(server, state);
3838 case -NFS4ERR_STALE_STATEID:
3839 case -NFS4ERR_STALE_CLIENTID:
3840 nfs4_schedule_lease_recovery(clp);
3841 goto wait_on_recovery;
3842#if defined(CONFIG_NFS_V4_1)
3843 case -NFS4ERR_BADSESSION:
3844 case -NFS4ERR_BADSLOT:
3845 case -NFS4ERR_BAD_HIGH_SLOT:
3846 case -NFS4ERR_DEADSESSION:
3847 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3848 case -NFS4ERR_SEQ_FALSE_RETRY:
3849 case -NFS4ERR_SEQ_MISORDERED:
3850 dprintk("%s ERROR %d, Reset session\n", __func__,
3851 task->tk_status);
3852 nfs4_schedule_session_recovery(clp->cl_session);
3853 task->tk_status = 0;
3854 return -EAGAIN;
3855#endif /* CONFIG_NFS_V4_1 */
3856 case -NFS4ERR_DELAY:
3857 nfs_inc_server_stats(server, NFSIOS_DELAY);
3858 case -NFS4ERR_GRACE:
3859 case -EKEYEXPIRED:
3860 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3861 task->tk_status = 0;
3862 return -EAGAIN;
3863 case -NFS4ERR_RETRY_UNCACHED_REP:
3864 case -NFS4ERR_OLD_STATEID:
3865 task->tk_status = 0;
3866 return -EAGAIN;
3867 }
3868 task->tk_status = nfs4_map_errors(task->tk_status);
3869 return 0;
3870wait_on_recovery:
3871 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3872 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3873 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3874 task->tk_status = 0;
3875 return -EAGAIN;
3876}
3877
3878static void nfs4_construct_boot_verifier(struct nfs_client *clp,
3879 nfs4_verifier *bootverf)
3880{
3881 __be32 verf[2];
3882
3883 verf[0] = htonl((u32)clp->cl_boot_time.tv_sec);
3884 verf[1] = htonl((u32)clp->cl_boot_time.tv_nsec);
3885 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3886}
3887
3888int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3889 unsigned short port, struct rpc_cred *cred,
3890 struct nfs4_setclientid_res *res)
3891{
3892 nfs4_verifier sc_verifier;
3893 struct nfs4_setclientid setclientid = {
3894 .sc_verifier = &sc_verifier,
3895 .sc_prog = program,
3896 .sc_cb_ident = clp->cl_cb_ident,
3897 };
3898 struct rpc_message msg = {
3899 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3900 .rpc_argp = &setclientid,
3901 .rpc_resp = res,
3902 .rpc_cred = cred,
3903 };
3904 int loop = 0;
3905 int status;
3906
3907 nfs4_construct_boot_verifier(clp, &sc_verifier);
3908
3909 for(;;) {
3910 rcu_read_lock();
3911 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3912 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3913 clp->cl_ipaddr,
3914 rpc_peeraddr2str(clp->cl_rpcclient,
3915 RPC_DISPLAY_ADDR),
3916 rpc_peeraddr2str(clp->cl_rpcclient,
3917 RPC_DISPLAY_PROTO),
3918 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3919 clp->cl_id_uniquifier);
3920 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3921 sizeof(setclientid.sc_netid),
3922 rpc_peeraddr2str(clp->cl_rpcclient,
3923 RPC_DISPLAY_NETID));
3924 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3925 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3926 clp->cl_ipaddr, port >> 8, port & 255);
3927 rcu_read_unlock();
3928
3929 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3930 if (status != -NFS4ERR_CLID_INUSE)
3931 break;
3932 if (loop != 0) {
3933 ++clp->cl_id_uniquifier;
3934 break;
3935 }
3936 ++loop;
3937 ssleep(clp->cl_lease_time / HZ + 1);
3938 }
3939 return status;
3940}
3941
3942int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3943 struct nfs4_setclientid_res *arg,
3944 struct rpc_cred *cred)
3945{
3946 struct nfs_fsinfo fsinfo;
3947 struct rpc_message msg = {
3948 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3949 .rpc_argp = arg,
3950 .rpc_resp = &fsinfo,
3951 .rpc_cred = cred,
3952 };
3953 unsigned long now;
3954 int status;
3955
3956 now = jiffies;
3957 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3958 if (status == 0) {
3959 spin_lock(&clp->cl_lock);
3960 clp->cl_lease_time = fsinfo.lease_time * HZ;
3961 clp->cl_last_renewal = now;
3962 spin_unlock(&clp->cl_lock);
3963 }
3964 return status;
3965}
3966
3967struct nfs4_delegreturndata {
3968 struct nfs4_delegreturnargs args;
3969 struct nfs4_delegreturnres res;
3970 struct nfs_fh fh;
3971 nfs4_stateid stateid;
3972 unsigned long timestamp;
3973 struct nfs_fattr fattr;
3974 int rpc_status;
3975};
3976
3977static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3978{
3979 struct nfs4_delegreturndata *data = calldata;
3980
3981 if (!nfs4_sequence_done(task, &data->res.seq_res))
3982 return;
3983
3984 switch (task->tk_status) {
3985 case -NFS4ERR_STALE_STATEID:
3986 case -NFS4ERR_EXPIRED:
3987 case 0:
3988 renew_lease(data->res.server, data->timestamp);
3989 break;
3990 default:
3991 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3992 -EAGAIN) {
3993 rpc_restart_call_prepare(task);
3994 return;
3995 }
3996 }
3997 data->rpc_status = task->tk_status;
3998}
3999
4000static void nfs4_delegreturn_release(void *calldata)
4001{
4002 kfree(calldata);
4003}
4004
4005#if defined(CONFIG_NFS_V4_1)
4006static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4007{
4008 struct nfs4_delegreturndata *d_data;
4009
4010 d_data = (struct nfs4_delegreturndata *)data;
4011
4012 if (nfs4_setup_sequence(d_data->res.server,
4013 &d_data->args.seq_args,
4014 &d_data->res.seq_res, task))
4015 return;
4016 rpc_call_start(task);
4017}
4018#endif /* CONFIG_NFS_V4_1 */
4019
4020static const struct rpc_call_ops nfs4_delegreturn_ops = {
4021#if defined(CONFIG_NFS_V4_1)
4022 .rpc_call_prepare = nfs4_delegreturn_prepare,
4023#endif /* CONFIG_NFS_V4_1 */
4024 .rpc_call_done = nfs4_delegreturn_done,
4025 .rpc_release = nfs4_delegreturn_release,
4026};
4027
4028static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4029{
4030 struct nfs4_delegreturndata *data;
4031 struct nfs_server *server = NFS_SERVER(inode);
4032 struct rpc_task *task;
4033 struct rpc_message msg = {
4034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4035 .rpc_cred = cred,
4036 };
4037 struct rpc_task_setup task_setup_data = {
4038 .rpc_client = server->client,
4039 .rpc_message = &msg,
4040 .callback_ops = &nfs4_delegreturn_ops,
4041 .flags = RPC_TASK_ASYNC,
4042 };
4043 int status = 0;
4044
4045 data = kzalloc(sizeof(*data), GFP_NOFS);
4046 if (data == NULL)
4047 return -ENOMEM;
4048 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4049 data->args.fhandle = &data->fh;
4050 data->args.stateid = &data->stateid;
4051 data->args.bitmask = server->attr_bitmask;
4052 nfs_copy_fh(&data->fh, NFS_FH(inode));
4053 nfs4_stateid_copy(&data->stateid, stateid);
4054 data->res.fattr = &data->fattr;
4055 data->res.server = server;
4056 nfs_fattr_init(data->res.fattr);
4057 data->timestamp = jiffies;
4058 data->rpc_status = 0;
4059
4060 task_setup_data.callback_data = data;
4061 msg.rpc_argp = &data->args;
4062 msg.rpc_resp = &data->res;
4063 task = rpc_run_task(&task_setup_data);
4064 if (IS_ERR(task))
4065 return PTR_ERR(task);
4066 if (!issync)
4067 goto out;
4068 status = nfs4_wait_for_completion_rpc_task(task);
4069 if (status != 0)
4070 goto out;
4071 status = data->rpc_status;
4072 if (status != 0)
4073 goto out;
4074 nfs_refresh_inode(inode, &data->fattr);
4075out:
4076 rpc_put_task(task);
4077 return status;
4078}
4079
4080int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4081{
4082 struct nfs_server *server = NFS_SERVER(inode);
4083 struct nfs4_exception exception = { };
4084 int err;
4085 do {
4086 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4087 switch (err) {
4088 case -NFS4ERR_STALE_STATEID:
4089 case -NFS4ERR_EXPIRED:
4090 case 0:
4091 return 0;
4092 }
4093 err = nfs4_handle_exception(server, err, &exception);
4094 } while (exception.retry);
4095 return err;
4096}
4097
4098#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4099#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4100
4101/*
4102 * sleep, with exponential backoff, and retry the LOCK operation.
4103 */
4104static unsigned long
4105nfs4_set_lock_task_retry(unsigned long timeout)
4106{
4107 freezable_schedule_timeout_killable(timeout);
4108 timeout <<= 1;
4109 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4110 return NFS4_LOCK_MAXTIMEOUT;
4111 return timeout;
4112}
4113
4114static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4115{
4116 struct inode *inode = state->inode;
4117 struct nfs_server *server = NFS_SERVER(inode);
4118 struct nfs_client *clp = server->nfs_client;
4119 struct nfs_lockt_args arg = {
4120 .fh = NFS_FH(inode),
4121 .fl = request,
4122 };
4123 struct nfs_lockt_res res = {
4124 .denied = request,
4125 };
4126 struct rpc_message msg = {
4127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4128 .rpc_argp = &arg,
4129 .rpc_resp = &res,
4130 .rpc_cred = state->owner->so_cred,
4131 };
4132 struct nfs4_lock_state *lsp;
4133 int status;
4134
4135 arg.lock_owner.clientid = clp->cl_clientid;
4136 status = nfs4_set_lock_state(state, request);
4137 if (status != 0)
4138 goto out;
4139 lsp = request->fl_u.nfs4_fl.owner;
4140 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4141 arg.lock_owner.s_dev = server->s_dev;
4142 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4143 switch (status) {
4144 case 0:
4145 request->fl_type = F_UNLCK;
4146 break;
4147 case -NFS4ERR_DENIED:
4148 status = 0;
4149 }
4150 request->fl_ops->fl_release_private(request);
4151out:
4152 return status;
4153}
4154
4155static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4156{
4157 struct nfs4_exception exception = { };
4158 int err;
4159
4160 do {
4161 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4162 _nfs4_proc_getlk(state, cmd, request),
4163 &exception);
4164 } while (exception.retry);
4165 return err;
4166}
4167
4168static int do_vfs_lock(struct file *file, struct file_lock *fl)
4169{
4170 int res = 0;
4171 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4172 case FL_POSIX:
4173 res = posix_lock_file_wait(file, fl);
4174 break;
4175 case FL_FLOCK:
4176 res = flock_lock_file_wait(file, fl);
4177 break;
4178 default:
4179 BUG();
4180 }
4181 return res;
4182}
4183
4184struct nfs4_unlockdata {
4185 struct nfs_locku_args arg;
4186 struct nfs_locku_res res;
4187 struct nfs4_lock_state *lsp;
4188 struct nfs_open_context *ctx;
4189 struct file_lock fl;
4190 const struct nfs_server *server;
4191 unsigned long timestamp;
4192};
4193
4194static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4195 struct nfs_open_context *ctx,
4196 struct nfs4_lock_state *lsp,
4197 struct nfs_seqid *seqid)
4198{
4199 struct nfs4_unlockdata *p;
4200 struct inode *inode = lsp->ls_state->inode;
4201
4202 p = kzalloc(sizeof(*p), GFP_NOFS);
4203 if (p == NULL)
4204 return NULL;
4205 p->arg.fh = NFS_FH(inode);
4206 p->arg.fl = &p->fl;
4207 p->arg.seqid = seqid;
4208 p->res.seqid = seqid;
4209 p->arg.stateid = &lsp->ls_stateid;
4210 p->lsp = lsp;
4211 atomic_inc(&lsp->ls_count);
4212 /* Ensure we don't close file until we're done freeing locks! */
4213 p->ctx = get_nfs_open_context(ctx);
4214 memcpy(&p->fl, fl, sizeof(p->fl));
4215 p->server = NFS_SERVER(inode);
4216 return p;
4217}
4218
4219static void nfs4_locku_release_calldata(void *data)
4220{
4221 struct nfs4_unlockdata *calldata = data;
4222 nfs_free_seqid(calldata->arg.seqid);
4223 nfs4_put_lock_state(calldata->lsp);
4224 put_nfs_open_context(calldata->ctx);
4225 kfree(calldata);
4226}
4227
4228static void nfs4_locku_done(struct rpc_task *task, void *data)
4229{
4230 struct nfs4_unlockdata *calldata = data;
4231
4232 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4233 return;
4234 switch (task->tk_status) {
4235 case 0:
4236 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4237 &calldata->res.stateid);
4238 renew_lease(calldata->server, calldata->timestamp);
4239 break;
4240 case -NFS4ERR_BAD_STATEID:
4241 case -NFS4ERR_OLD_STATEID:
4242 case -NFS4ERR_STALE_STATEID:
4243 case -NFS4ERR_EXPIRED:
4244 break;
4245 default:
4246 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4247 rpc_restart_call_prepare(task);
4248 }
4249}
4250
4251static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4252{
4253 struct nfs4_unlockdata *calldata = data;
4254
4255 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4256 return;
4257 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4258 /* Note: exit _without_ running nfs4_locku_done */
4259 task->tk_action = NULL;
4260 return;
4261 }
4262 calldata->timestamp = jiffies;
4263 if (nfs4_setup_sequence(calldata->server,
4264 &calldata->arg.seq_args,
4265 &calldata->res.seq_res, task))
4266 return;
4267 rpc_call_start(task);
4268}
4269
4270static const struct rpc_call_ops nfs4_locku_ops = {
4271 .rpc_call_prepare = nfs4_locku_prepare,
4272 .rpc_call_done = nfs4_locku_done,
4273 .rpc_release = nfs4_locku_release_calldata,
4274};
4275
4276static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4277 struct nfs_open_context *ctx,
4278 struct nfs4_lock_state *lsp,
4279 struct nfs_seqid *seqid)
4280{
4281 struct nfs4_unlockdata *data;
4282 struct rpc_message msg = {
4283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4284 .rpc_cred = ctx->cred,
4285 };
4286 struct rpc_task_setup task_setup_data = {
4287 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4288 .rpc_message = &msg,
4289 .callback_ops = &nfs4_locku_ops,
4290 .workqueue = nfsiod_workqueue,
4291 .flags = RPC_TASK_ASYNC,
4292 };
4293
4294 /* Ensure this is an unlock - when canceling a lock, the
4295 * canceled lock is passed in, and it won't be an unlock.
4296 */
4297 fl->fl_type = F_UNLCK;
4298
4299 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4300 if (data == NULL) {
4301 nfs_free_seqid(seqid);
4302 return ERR_PTR(-ENOMEM);
4303 }
4304
4305 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4306 msg.rpc_argp = &data->arg;
4307 msg.rpc_resp = &data->res;
4308 task_setup_data.callback_data = data;
4309 return rpc_run_task(&task_setup_data);
4310}
4311
4312static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4313{
4314 struct nfs_inode *nfsi = NFS_I(state->inode);
4315 struct nfs_seqid *seqid;
4316 struct nfs4_lock_state *lsp;
4317 struct rpc_task *task;
4318 int status = 0;
4319 unsigned char fl_flags = request->fl_flags;
4320
4321 status = nfs4_set_lock_state(state, request);
4322 /* Unlock _before_ we do the RPC call */
4323 request->fl_flags |= FL_EXISTS;
4324 down_read(&nfsi->rwsem);
4325 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4326 up_read(&nfsi->rwsem);
4327 goto out;
4328 }
4329 up_read(&nfsi->rwsem);
4330 if (status != 0)
4331 goto out;
4332 /* Is this a delegated lock? */
4333 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4334 goto out;
4335 lsp = request->fl_u.nfs4_fl.owner;
4336 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4337 status = -ENOMEM;
4338 if (seqid == NULL)
4339 goto out;
4340 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4341 status = PTR_ERR(task);
4342 if (IS_ERR(task))
4343 goto out;
4344 status = nfs4_wait_for_completion_rpc_task(task);
4345 rpc_put_task(task);
4346out:
4347 request->fl_flags = fl_flags;
4348 return status;
4349}
4350
4351struct nfs4_lockdata {
4352 struct nfs_lock_args arg;
4353 struct nfs_lock_res res;
4354 struct nfs4_lock_state *lsp;
4355 struct nfs_open_context *ctx;
4356 struct file_lock fl;
4357 unsigned long timestamp;
4358 int rpc_status;
4359 int cancelled;
4360 struct nfs_server *server;
4361};
4362
4363static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4364 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4365 gfp_t gfp_mask)
4366{
4367 struct nfs4_lockdata *p;
4368 struct inode *inode = lsp->ls_state->inode;
4369 struct nfs_server *server = NFS_SERVER(inode);
4370
4371 p = kzalloc(sizeof(*p), gfp_mask);
4372 if (p == NULL)
4373 return NULL;
4374
4375 p->arg.fh = NFS_FH(inode);
4376 p->arg.fl = &p->fl;
4377 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4378 if (p->arg.open_seqid == NULL)
4379 goto out_free;
4380 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4381 if (p->arg.lock_seqid == NULL)
4382 goto out_free_seqid;
4383 p->arg.lock_stateid = &lsp->ls_stateid;
4384 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4385 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4386 p->arg.lock_owner.s_dev = server->s_dev;
4387 p->res.lock_seqid = p->arg.lock_seqid;
4388 p->lsp = lsp;
4389 p->server = server;
4390 atomic_inc(&lsp->ls_count);
4391 p->ctx = get_nfs_open_context(ctx);
4392 memcpy(&p->fl, fl, sizeof(p->fl));
4393 return p;
4394out_free_seqid:
4395 nfs_free_seqid(p->arg.open_seqid);
4396out_free:
4397 kfree(p);
4398 return NULL;
4399}
4400
4401static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4402{
4403 struct nfs4_lockdata *data = calldata;
4404 struct nfs4_state *state = data->lsp->ls_state;
4405
4406 dprintk("%s: begin!\n", __func__);
4407 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4408 return;
4409 /* Do we need to do an open_to_lock_owner? */
4410 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4411 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4412 return;
4413 data->arg.open_stateid = &state->stateid;
4414 data->arg.new_lock_owner = 1;
4415 data->res.open_seqid = data->arg.open_seqid;
4416 } else
4417 data->arg.new_lock_owner = 0;
4418 data->timestamp = jiffies;
4419 if (nfs4_setup_sequence(data->server,
4420 &data->arg.seq_args,
4421 &data->res.seq_res, task))
4422 return;
4423 rpc_call_start(task);
4424 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4425}
4426
4427static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4428{
4429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4430 nfs4_lock_prepare(task, calldata);
4431}
4432
4433static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4434{
4435 struct nfs4_lockdata *data = calldata;
4436
4437 dprintk("%s: begin!\n", __func__);
4438
4439 if (!nfs4_sequence_done(task, &data->res.seq_res))
4440 return;
4441
4442 data->rpc_status = task->tk_status;
4443 if (data->arg.new_lock_owner != 0) {
4444 if (data->rpc_status == 0)
4445 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4446 else
4447 goto out;
4448 }
4449 if (data->rpc_status == 0) {
4450 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4451 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4452 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4453 }
4454out:
4455 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4456}
4457
4458static void nfs4_lock_release(void *calldata)
4459{
4460 struct nfs4_lockdata *data = calldata;
4461
4462 dprintk("%s: begin!\n", __func__);
4463 nfs_free_seqid(data->arg.open_seqid);
4464 if (data->cancelled != 0) {
4465 struct rpc_task *task;
4466 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4467 data->arg.lock_seqid);
4468 if (!IS_ERR(task))
4469 rpc_put_task_async(task);
4470 dprintk("%s: cancelling lock!\n", __func__);
4471 } else
4472 nfs_free_seqid(data->arg.lock_seqid);
4473 nfs4_put_lock_state(data->lsp);
4474 put_nfs_open_context(data->ctx);
4475 kfree(data);
4476 dprintk("%s: done!\n", __func__);
4477}
4478
4479static const struct rpc_call_ops nfs4_lock_ops = {
4480 .rpc_call_prepare = nfs4_lock_prepare,
4481 .rpc_call_done = nfs4_lock_done,
4482 .rpc_release = nfs4_lock_release,
4483};
4484
4485static const struct rpc_call_ops nfs4_recover_lock_ops = {
4486 .rpc_call_prepare = nfs4_recover_lock_prepare,
4487 .rpc_call_done = nfs4_lock_done,
4488 .rpc_release = nfs4_lock_release,
4489};
4490
4491static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4492{
4493 switch (error) {
4494 case -NFS4ERR_ADMIN_REVOKED:
4495 case -NFS4ERR_BAD_STATEID:
4496 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4497 if (new_lock_owner != 0 ||
4498 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4499 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4500 break;
4501 case -NFS4ERR_STALE_STATEID:
4502 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4503 case -NFS4ERR_EXPIRED:
4504 nfs4_schedule_lease_recovery(server->nfs_client);
4505 };
4506}
4507
4508static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4509{
4510 struct nfs4_lockdata *data;
4511 struct rpc_task *task;
4512 struct rpc_message msg = {
4513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4514 .rpc_cred = state->owner->so_cred,
4515 };
4516 struct rpc_task_setup task_setup_data = {
4517 .rpc_client = NFS_CLIENT(state->inode),
4518 .rpc_message = &msg,
4519 .callback_ops = &nfs4_lock_ops,
4520 .workqueue = nfsiod_workqueue,
4521 .flags = RPC_TASK_ASYNC,
4522 };
4523 int ret;
4524
4525 dprintk("%s: begin!\n", __func__);
4526 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4527 fl->fl_u.nfs4_fl.owner,
4528 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4529 if (data == NULL)
4530 return -ENOMEM;
4531 if (IS_SETLKW(cmd))
4532 data->arg.block = 1;
4533 if (recovery_type > NFS_LOCK_NEW) {
4534 if (recovery_type == NFS_LOCK_RECLAIM)
4535 data->arg.reclaim = NFS_LOCK_RECLAIM;
4536 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4537 }
4538 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4539 msg.rpc_argp = &data->arg;
4540 msg.rpc_resp = &data->res;
4541 task_setup_data.callback_data = data;
4542 task = rpc_run_task(&task_setup_data);
4543 if (IS_ERR(task))
4544 return PTR_ERR(task);
4545 ret = nfs4_wait_for_completion_rpc_task(task);
4546 if (ret == 0) {
4547 ret = data->rpc_status;
4548 if (ret)
4549 nfs4_handle_setlk_error(data->server, data->lsp,
4550 data->arg.new_lock_owner, ret);
4551 } else
4552 data->cancelled = 1;
4553 rpc_put_task(task);
4554 dprintk("%s: done, ret = %d!\n", __func__, ret);
4555 return ret;
4556}
4557
4558static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4559{
4560 struct nfs_server *server = NFS_SERVER(state->inode);
4561 struct nfs4_exception exception = {
4562 .inode = state->inode,
4563 };
4564 int err;
4565
4566 do {
4567 /* Cache the lock if possible... */
4568 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4569 return 0;
4570 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4571 if (err != -NFS4ERR_DELAY)
4572 break;
4573 nfs4_handle_exception(server, err, &exception);
4574 } while (exception.retry);
4575 return err;
4576}
4577
4578static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4579{
4580 struct nfs_server *server = NFS_SERVER(state->inode);
4581 struct nfs4_exception exception = {
4582 .inode = state->inode,
4583 };
4584 int err;
4585
4586 err = nfs4_set_lock_state(state, request);
4587 if (err != 0)
4588 return err;
4589 do {
4590 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4591 return 0;
4592 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4593 switch (err) {
4594 default:
4595 goto out;
4596 case -NFS4ERR_GRACE:
4597 case -NFS4ERR_DELAY:
4598 nfs4_handle_exception(server, err, &exception);
4599 err = 0;
4600 }
4601 } while (exception.retry);
4602out:
4603 return err;
4604}
4605
4606#if defined(CONFIG_NFS_V4_1)
4607static int nfs41_check_expired_locks(struct nfs4_state *state)
4608{
4609 int status, ret = NFS_OK;
4610 struct nfs4_lock_state *lsp;
4611 struct nfs_server *server = NFS_SERVER(state->inode);
4612
4613 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4614 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4615 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4616 if (status != NFS_OK) {
4617 nfs41_free_stateid(server, &lsp->ls_stateid);
4618 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4619 ret = status;
4620 }
4621 }
4622 };
4623
4624 return ret;
4625}
4626
4627static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4628{
4629 int status = NFS_OK;
4630
4631 if (test_bit(LK_STATE_IN_USE, &state->flags))
4632 status = nfs41_check_expired_locks(state);
4633 if (status == NFS_OK)
4634 return status;
4635 return nfs4_lock_expired(state, request);
4636}
4637#endif
4638
4639static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4640{
4641 struct nfs_inode *nfsi = NFS_I(state->inode);
4642 unsigned char fl_flags = request->fl_flags;
4643 int status = -ENOLCK;
4644
4645 if ((fl_flags & FL_POSIX) &&
4646 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4647 goto out;
4648 /* Is this a delegated open? */
4649 status = nfs4_set_lock_state(state, request);
4650 if (status != 0)
4651 goto out;
4652 request->fl_flags |= FL_ACCESS;
4653 status = do_vfs_lock(request->fl_file, request);
4654 if (status < 0)
4655 goto out;
4656 down_read(&nfsi->rwsem);
4657 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4658 /* Yes: cache locks! */
4659 /* ...but avoid races with delegation recall... */
4660 request->fl_flags = fl_flags & ~FL_SLEEP;
4661 status = do_vfs_lock(request->fl_file, request);
4662 goto out_unlock;
4663 }
4664 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4665 if (status != 0)
4666 goto out_unlock;
4667 /* Note: we always want to sleep here! */
4668 request->fl_flags = fl_flags | FL_SLEEP;
4669 if (do_vfs_lock(request->fl_file, request) < 0)
4670 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4671 "manager!\n", __func__);
4672out_unlock:
4673 up_read(&nfsi->rwsem);
4674out:
4675 request->fl_flags = fl_flags;
4676 return status;
4677}
4678
4679static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4680{
4681 struct nfs4_exception exception = {
4682 .state = state,
4683 .inode = state->inode,
4684 };
4685 int err;
4686
4687 do {
4688 err = _nfs4_proc_setlk(state, cmd, request);
4689 if (err == -NFS4ERR_DENIED)
4690 err = -EAGAIN;
4691 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4692 err, &exception);
4693 } while (exception.retry);
4694 return err;
4695}
4696
4697static int
4698nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4699{
4700 struct nfs_open_context *ctx;
4701 struct nfs4_state *state;
4702 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4703 int status;
4704
4705 /* verify open state */
4706 ctx = nfs_file_open_context(filp);
4707 state = ctx->state;
4708
4709 if (request->fl_start < 0 || request->fl_end < 0)
4710 return -EINVAL;
4711
4712 if (IS_GETLK(cmd)) {
4713 if (state != NULL)
4714 return nfs4_proc_getlk(state, F_GETLK, request);
4715 return 0;
4716 }
4717
4718 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4719 return -EINVAL;
4720
4721 if (request->fl_type == F_UNLCK) {
4722 if (state != NULL)
4723 return nfs4_proc_unlck(state, cmd, request);
4724 return 0;
4725 }
4726
4727 if (state == NULL)
4728 return -ENOLCK;
4729 do {
4730 status = nfs4_proc_setlk(state, cmd, request);
4731 if ((status != -EAGAIN) || IS_SETLK(cmd))
4732 break;
4733 timeout = nfs4_set_lock_task_retry(timeout);
4734 status = -ERESTARTSYS;
4735 if (signalled())
4736 break;
4737 } while(status < 0);
4738 return status;
4739}
4740
4741int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4742{
4743 struct nfs_server *server = NFS_SERVER(state->inode);
4744 struct nfs4_exception exception = { };
4745 int err;
4746
4747 err = nfs4_set_lock_state(state, fl);
4748 if (err != 0)
4749 goto out;
4750 do {
4751 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4752 switch (err) {
4753 default:
4754 printk(KERN_ERR "NFS: %s: unhandled error "
4755 "%d.\n", __func__, err);
4756 case 0:
4757 case -ESTALE:
4758 goto out;
4759 case -NFS4ERR_EXPIRED:
4760 nfs4_schedule_stateid_recovery(server, state);
4761 case -NFS4ERR_STALE_CLIENTID:
4762 case -NFS4ERR_STALE_STATEID:
4763 nfs4_schedule_lease_recovery(server->nfs_client);
4764 goto out;
4765 case -NFS4ERR_BADSESSION:
4766 case -NFS4ERR_BADSLOT:
4767 case -NFS4ERR_BAD_HIGH_SLOT:
4768 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4769 case -NFS4ERR_DEADSESSION:
4770 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4771 goto out;
4772 case -ERESTARTSYS:
4773 /*
4774 * The show must go on: exit, but mark the
4775 * stateid as needing recovery.
4776 */
4777 case -NFS4ERR_DELEG_REVOKED:
4778 case -NFS4ERR_ADMIN_REVOKED:
4779 case -NFS4ERR_BAD_STATEID:
4780 case -NFS4ERR_OPENMODE:
4781 nfs4_schedule_stateid_recovery(server, state);
4782 err = 0;
4783 goto out;
4784 case -EKEYEXPIRED:
4785 /*
4786 * User RPCSEC_GSS context has expired.
4787 * We cannot recover this stateid now, so
4788 * skip it and allow recovery thread to
4789 * proceed.
4790 */
4791 err = 0;
4792 goto out;
4793 case -ENOMEM:
4794 case -NFS4ERR_DENIED:
4795 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4796 err = 0;
4797 goto out;
4798 case -NFS4ERR_DELAY:
4799 break;
4800 }
4801 err = nfs4_handle_exception(server, err, &exception);
4802 } while (exception.retry);
4803out:
4804 return err;
4805}
4806
4807struct nfs_release_lockowner_data {
4808 struct nfs4_lock_state *lsp;
4809 struct nfs_server *server;
4810 struct nfs_release_lockowner_args args;
4811};
4812
4813static void nfs4_release_lockowner_release(void *calldata)
4814{
4815 struct nfs_release_lockowner_data *data = calldata;
4816 nfs4_free_lock_state(data->server, data->lsp);
4817 kfree(calldata);
4818}
4819
4820static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4821 .rpc_release = nfs4_release_lockowner_release,
4822};
4823
4824int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4825{
4826 struct nfs_server *server = lsp->ls_state->owner->so_server;
4827 struct nfs_release_lockowner_data *data;
4828 struct rpc_message msg = {
4829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4830 };
4831
4832 if (server->nfs_client->cl_mvops->minor_version != 0)
4833 return -EINVAL;
4834 data = kmalloc(sizeof(*data), GFP_NOFS);
4835 if (!data)
4836 return -ENOMEM;
4837 data->lsp = lsp;
4838 data->server = server;
4839 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4840 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4841 data->args.lock_owner.s_dev = server->s_dev;
4842 msg.rpc_argp = &data->args;
4843 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4844 return 0;
4845}
4846
4847#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4848
4849static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4850 const void *buf, size_t buflen,
4851 int flags, int type)
4852{
4853 if (strcmp(key, "") != 0)
4854 return -EINVAL;
4855
4856 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4857}
4858
4859static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4860 void *buf, size_t buflen, int type)
4861{
4862 if (strcmp(key, "") != 0)
4863 return -EINVAL;
4864
4865 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4866}
4867
4868static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4869 size_t list_len, const char *name,
4870 size_t name_len, int type)
4871{
4872 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4873
4874 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4875 return 0;
4876
4877 if (list && len <= list_len)
4878 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4879 return len;
4880}
4881
4882/*
4883 * nfs_fhget will use either the mounted_on_fileid or the fileid
4884 */
4885static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4886{
4887 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4888 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4889 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4890 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4891 return;
4892
4893 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4894 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4895 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4896 fattr->nlink = 2;
4897}
4898
4899int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4900 struct nfs4_fs_locations *fs_locations, struct page *page)
4901{
4902 struct nfs_server *server = NFS_SERVER(dir);
4903 u32 bitmask[2] = {
4904 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4905 };
4906 struct nfs4_fs_locations_arg args = {
4907 .dir_fh = NFS_FH(dir),
4908 .name = name,
4909 .page = page,
4910 .bitmask = bitmask,
4911 };
4912 struct nfs4_fs_locations_res res = {
4913 .fs_locations = fs_locations,
4914 };
4915 struct rpc_message msg = {
4916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4917 .rpc_argp = &args,
4918 .rpc_resp = &res,
4919 };
4920 int status;
4921
4922 dprintk("%s: start\n", __func__);
4923
4924 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4925 * is not supported */
4926 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4927 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4928 else
4929 bitmask[0] |= FATTR4_WORD0_FILEID;
4930
4931 nfs_fattr_init(&fs_locations->fattr);
4932 fs_locations->server = server;
4933 fs_locations->nlocations = 0;
4934 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4935 dprintk("%s: returned status = %d\n", __func__, status);
4936 return status;
4937}
4938
4939static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4940{
4941 int status;
4942 struct nfs4_secinfo_arg args = {
4943 .dir_fh = NFS_FH(dir),
4944 .name = name,
4945 };
4946 struct nfs4_secinfo_res res = {
4947 .flavors = flavors,
4948 };
4949 struct rpc_message msg = {
4950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4951 .rpc_argp = &args,
4952 .rpc_resp = &res,
4953 };
4954
4955 dprintk("NFS call secinfo %s\n", name->name);
4956 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4957 dprintk("NFS reply secinfo: %d\n", status);
4958 return status;
4959}
4960
4961static int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
4962 struct nfs4_secinfo_flavors *flavors)
4963{
4964 struct nfs4_exception exception = { };
4965 int err;
4966 do {
4967 err = nfs4_handle_exception(NFS_SERVER(dir),
4968 _nfs4_proc_secinfo(dir, name, flavors),
4969 &exception);
4970 } while (exception.retry);
4971 return err;
4972}
4973
4974#ifdef CONFIG_NFS_V4_1
4975/*
4976 * Check the exchange flags returned by the server for invalid flags, having
4977 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4978 * DS flags set.
4979 */
4980static int nfs4_check_cl_exchange_flags(u32 flags)
4981{
4982 if (flags & ~EXCHGID4_FLAG_MASK_R)
4983 goto out_inval;
4984 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4985 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4986 goto out_inval;
4987 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4988 goto out_inval;
4989 return NFS_OK;
4990out_inval:
4991 return -NFS4ERR_INVAL;
4992}
4993
4994static bool
4995nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4996{
4997 if (a->server_scope_sz == b->server_scope_sz &&
4998 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4999 return true;
5000
5001 return false;
5002}
5003
5004/*
5005 * nfs4_proc_exchange_id()
5006 *
5007 * Since the clientid has expired, all compounds using sessions
5008 * associated with the stale clientid will be returning
5009 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5010 * be in some phase of session reset.
5011 */
5012int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5013{
5014 nfs4_verifier verifier;
5015 struct nfs41_exchange_id_args args = {
5016 .verifier = &verifier,
5017 .client = clp,
5018 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5019 };
5020 struct nfs41_exchange_id_res res = {
5021 .client = clp,
5022 };
5023 int status;
5024 struct rpc_message msg = {
5025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5026 .rpc_argp = &args,
5027 .rpc_resp = &res,
5028 .rpc_cred = cred,
5029 };
5030
5031 dprintk("--> %s\n", __func__);
5032 BUG_ON(clp == NULL);
5033
5034 nfs4_construct_boot_verifier(clp, &verifier);
5035
5036 args.id_len = scnprintf(args.id, sizeof(args.id),
5037 "%s/%s.%s/%u",
5038 clp->cl_ipaddr,
5039 init_utsname()->nodename,
5040 init_utsname()->domainname,
5041 clp->cl_rpcclient->cl_auth->au_flavor);
5042
5043 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
5044 if (unlikely(!res.server_scope)) {
5045 status = -ENOMEM;
5046 goto out;
5047 }
5048
5049 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
5050 if (unlikely(!res.impl_id)) {
5051 status = -ENOMEM;
5052 goto out_server_scope;
5053 }
5054
5055 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5056 if (!status)
5057 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5058
5059 if (!status) {
5060 /* use the most recent implementation id */
5061 kfree(clp->impl_id);
5062 clp->impl_id = res.impl_id;
5063 } else
5064 kfree(res.impl_id);
5065
5066 if (!status) {
5067 if (clp->server_scope &&
5068 !nfs41_same_server_scope(clp->server_scope,
5069 res.server_scope)) {
5070 dprintk("%s: server_scope mismatch detected\n",
5071 __func__);
5072 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5073 kfree(clp->server_scope);
5074 clp->server_scope = NULL;
5075 }
5076
5077 if (!clp->server_scope) {
5078 clp->server_scope = res.server_scope;
5079 goto out;
5080 }
5081 }
5082
5083out_server_scope:
5084 kfree(res.server_scope);
5085out:
5086 if (clp->impl_id)
5087 dprintk("%s: Server Implementation ID: "
5088 "domain: %s, name: %s, date: %llu,%u\n",
5089 __func__, clp->impl_id->domain, clp->impl_id->name,
5090 clp->impl_id->date.seconds,
5091 clp->impl_id->date.nseconds);
5092 dprintk("<-- %s status= %d\n", __func__, status);
5093 return status;
5094}
5095
5096struct nfs4_get_lease_time_data {
5097 struct nfs4_get_lease_time_args *args;
5098 struct nfs4_get_lease_time_res *res;
5099 struct nfs_client *clp;
5100};
5101
5102static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5103 void *calldata)
5104{
5105 int ret;
5106 struct nfs4_get_lease_time_data *data =
5107 (struct nfs4_get_lease_time_data *)calldata;
5108
5109 dprintk("--> %s\n", __func__);
5110 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5111 /* just setup sequence, do not trigger session recovery
5112 since we're invoked within one */
5113 ret = nfs41_setup_sequence(data->clp->cl_session,
5114 &data->args->la_seq_args,
5115 &data->res->lr_seq_res, task);
5116
5117 BUG_ON(ret == -EAGAIN);
5118 rpc_call_start(task);
5119 dprintk("<-- %s\n", __func__);
5120}
5121
5122/*
5123 * Called from nfs4_state_manager thread for session setup, so don't recover
5124 * from sequence operation or clientid errors.
5125 */
5126static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5127{
5128 struct nfs4_get_lease_time_data *data =
5129 (struct nfs4_get_lease_time_data *)calldata;
5130
5131 dprintk("--> %s\n", __func__);
5132 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5133 return;
5134 switch (task->tk_status) {
5135 case -NFS4ERR_DELAY:
5136 case -NFS4ERR_GRACE:
5137 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5138 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5139 task->tk_status = 0;
5140 /* fall through */
5141 case -NFS4ERR_RETRY_UNCACHED_REP:
5142 rpc_restart_call_prepare(task);
5143 return;
5144 }
5145 dprintk("<-- %s\n", __func__);
5146}
5147
5148static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5149 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5150 .rpc_call_done = nfs4_get_lease_time_done,
5151};
5152
5153int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5154{
5155 struct rpc_task *task;
5156 struct nfs4_get_lease_time_args args;
5157 struct nfs4_get_lease_time_res res = {
5158 .lr_fsinfo = fsinfo,
5159 };
5160 struct nfs4_get_lease_time_data data = {
5161 .args = &args,
5162 .res = &res,
5163 .clp = clp,
5164 };
5165 struct rpc_message msg = {
5166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5167 .rpc_argp = &args,
5168 .rpc_resp = &res,
5169 };
5170 struct rpc_task_setup task_setup = {
5171 .rpc_client = clp->cl_rpcclient,
5172 .rpc_message = &msg,
5173 .callback_ops = &nfs4_get_lease_time_ops,
5174 .callback_data = &data,
5175 .flags = RPC_TASK_TIMEOUT,
5176 };
5177 int status;
5178
5179 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5180 dprintk("--> %s\n", __func__);
5181 task = rpc_run_task(&task_setup);
5182
5183 if (IS_ERR(task))
5184 status = PTR_ERR(task);
5185 else {
5186 status = task->tk_status;
5187 rpc_put_task(task);
5188 }
5189 dprintk("<-- %s return %d\n", __func__, status);
5190
5191 return status;
5192}
5193
5194static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5195{
5196 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5197}
5198
5199static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5200 struct nfs4_slot *new,
5201 u32 max_slots,
5202 u32 ivalue)
5203{
5204 struct nfs4_slot *old = NULL;
5205 u32 i;
5206
5207 spin_lock(&tbl->slot_tbl_lock);
5208 if (new) {
5209 old = tbl->slots;
5210 tbl->slots = new;
5211 tbl->max_slots = max_slots;
5212 }
5213 tbl->highest_used_slotid = -1; /* no slot is currently used */
5214 for (i = 0; i < tbl->max_slots; i++)
5215 tbl->slots[i].seq_nr = ivalue;
5216 spin_unlock(&tbl->slot_tbl_lock);
5217 kfree(old);
5218}
5219
5220/*
5221 * (re)Initialise a slot table
5222 */
5223static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5224 u32 ivalue)
5225{
5226 struct nfs4_slot *new = NULL;
5227 int ret = -ENOMEM;
5228
5229 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5230 max_reqs, tbl->max_slots);
5231
5232 /* Does the newly negotiated max_reqs match the existing slot table? */
5233 if (max_reqs != tbl->max_slots) {
5234 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5235 if (!new)
5236 goto out;
5237 }
5238 ret = 0;
5239
5240 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5241 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5242 tbl, tbl->slots, tbl->max_slots);
5243out:
5244 dprintk("<-- %s: return %d\n", __func__, ret);
5245 return ret;
5246}
5247
5248/* Destroy the slot table */
5249static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5250{
5251 if (session->fc_slot_table.slots != NULL) {
5252 kfree(session->fc_slot_table.slots);
5253 session->fc_slot_table.slots = NULL;
5254 }
5255 if (session->bc_slot_table.slots != NULL) {
5256 kfree(session->bc_slot_table.slots);
5257 session->bc_slot_table.slots = NULL;
5258 }
5259 return;
5260}
5261
5262/*
5263 * Initialize or reset the forechannel and backchannel tables
5264 */
5265static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5266{
5267 struct nfs4_slot_table *tbl;
5268 int status;
5269
5270 dprintk("--> %s\n", __func__);
5271 /* Fore channel */
5272 tbl = &ses->fc_slot_table;
5273 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5274 if (status) /* -ENOMEM */
5275 return status;
5276 /* Back channel */
5277 tbl = &ses->bc_slot_table;
5278 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5279 if (status && tbl->slots == NULL)
5280 /* Fore and back channel share a connection so get
5281 * both slot tables or neither */
5282 nfs4_destroy_slot_tables(ses);
5283 return status;
5284}
5285
5286struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5287{
5288 struct nfs4_session *session;
5289 struct nfs4_slot_table *tbl;
5290
5291 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5292 if (!session)
5293 return NULL;
5294
5295 tbl = &session->fc_slot_table;
5296 tbl->highest_used_slotid = NFS4_NO_SLOT;
5297 spin_lock_init(&tbl->slot_tbl_lock);
5298 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5299 init_completion(&tbl->complete);
5300
5301 tbl = &session->bc_slot_table;
5302 tbl->highest_used_slotid = NFS4_NO_SLOT;
5303 spin_lock_init(&tbl->slot_tbl_lock);
5304 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5305 init_completion(&tbl->complete);
5306
5307 session->session_state = 1<<NFS4_SESSION_INITING;
5308
5309 session->clp = clp;
5310 return session;
5311}
5312
5313void nfs4_destroy_session(struct nfs4_session *session)
5314{
5315 struct rpc_xprt *xprt;
5316
5317 nfs4_proc_destroy_session(session);
5318
5319 rcu_read_lock();
5320 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5321 rcu_read_unlock();
5322 dprintk("%s Destroy backchannel for xprt %p\n",
5323 __func__, xprt);
5324 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5325 nfs4_destroy_slot_tables(session);
5326 kfree(session);
5327}
5328
5329/*
5330 * Initialize the values to be used by the client in CREATE_SESSION
5331 * If nfs4_init_session set the fore channel request and response sizes,
5332 * use them.
5333 *
5334 * Set the back channel max_resp_sz_cached to zero to force the client to
5335 * always set csa_cachethis to FALSE because the current implementation
5336 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5337 */
5338static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5339{
5340 struct nfs4_session *session = args->client->cl_session;
5341 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5342 mxresp_sz = session->fc_attrs.max_resp_sz;
5343
5344 if (mxrqst_sz == 0)
5345 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5346 if (mxresp_sz == 0)
5347 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5348 /* Fore channel attributes */
5349 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5350 args->fc_attrs.max_resp_sz = mxresp_sz;
5351 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5352 args->fc_attrs.max_reqs = max_session_slots;
5353
5354 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5355 "max_ops=%u max_reqs=%u\n",
5356 __func__,
5357 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5358 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5359
5360 /* Back channel attributes */
5361 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5362 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5363 args->bc_attrs.max_resp_sz_cached = 0;
5364 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5365 args->bc_attrs.max_reqs = 1;
5366
5367 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5368 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5369 __func__,
5370 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5371 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5372 args->bc_attrs.max_reqs);
5373}
5374
5375static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5376{
5377 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5378 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5379
5380 if (rcvd->max_resp_sz > sent->max_resp_sz)
5381 return -EINVAL;
5382 /*
5383 * Our requested max_ops is the minimum we need; we're not
5384 * prepared to break up compounds into smaller pieces than that.
5385 * So, no point even trying to continue if the server won't
5386 * cooperate:
5387 */
5388 if (rcvd->max_ops < sent->max_ops)
5389 return -EINVAL;
5390 if (rcvd->max_reqs == 0)
5391 return -EINVAL;
5392 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5393 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5394 return 0;
5395}
5396
5397static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5398{
5399 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5400 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5401
5402 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5403 return -EINVAL;
5404 if (rcvd->max_resp_sz < sent->max_resp_sz)
5405 return -EINVAL;
5406 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5407 return -EINVAL;
5408 /* These would render the backchannel useless: */
5409 if (rcvd->max_ops != sent->max_ops)
5410 return -EINVAL;
5411 if (rcvd->max_reqs != sent->max_reqs)
5412 return -EINVAL;
5413 return 0;
5414}
5415
5416static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5417 struct nfs4_session *session)
5418{
5419 int ret;
5420
5421 ret = nfs4_verify_fore_channel_attrs(args, session);
5422 if (ret)
5423 return ret;
5424 return nfs4_verify_back_channel_attrs(args, session);
5425}
5426
5427static int _nfs4_proc_create_session(struct nfs_client *clp)
5428{
5429 struct nfs4_session *session = clp->cl_session;
5430 struct nfs41_create_session_args args = {
5431 .client = clp,
5432 .cb_program = NFS4_CALLBACK,
5433 };
5434 struct nfs41_create_session_res res = {
5435 .client = clp,
5436 };
5437 struct rpc_message msg = {
5438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5439 .rpc_argp = &args,
5440 .rpc_resp = &res,
5441 };
5442 int status;
5443
5444 nfs4_init_channel_attrs(&args);
5445 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5446
5447 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5448
5449 if (!status)
5450 /* Verify the session's negotiated channel_attrs values */
5451 status = nfs4_verify_channel_attrs(&args, session);
5452 if (!status) {
5453 /* Increment the clientid slot sequence id */
5454 clp->cl_seqid++;
5455 }
5456
5457 return status;
5458}
5459
5460/*
5461 * Issues a CREATE_SESSION operation to the server.
5462 * It is the responsibility of the caller to verify the session is
5463 * expired before calling this routine.
5464 */
5465int nfs4_proc_create_session(struct nfs_client *clp)
5466{
5467 int status;
5468 unsigned *ptr;
5469 struct nfs4_session *session = clp->cl_session;
5470
5471 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5472
5473 status = _nfs4_proc_create_session(clp);
5474 if (status)
5475 goto out;
5476
5477 /* Init or reset the session slot tables */
5478 status = nfs4_setup_session_slot_tables(session);
5479 dprintk("slot table setup returned %d\n", status);
5480 if (status)
5481 goto out;
5482
5483 ptr = (unsigned *)&session->sess_id.data[0];
5484 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5485 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5486out:
5487 dprintk("<-- %s\n", __func__);
5488 return status;
5489}
5490
5491/*
5492 * Issue the over-the-wire RPC DESTROY_SESSION.
5493 * The caller must serialize access to this routine.
5494 */
5495int nfs4_proc_destroy_session(struct nfs4_session *session)
5496{
5497 int status = 0;
5498 struct rpc_message msg;
5499
5500 dprintk("--> nfs4_proc_destroy_session\n");
5501
5502 /* session is still being setup */
5503 if (session->clp->cl_cons_state != NFS_CS_READY)
5504 return status;
5505
5506 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5507 msg.rpc_argp = session;
5508 msg.rpc_resp = NULL;
5509 msg.rpc_cred = NULL;
5510 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5511
5512 if (status)
5513 printk(KERN_WARNING
5514 "NFS: Got error %d from the server on DESTROY_SESSION. "
5515 "Session has been destroyed regardless...\n", status);
5516
5517 dprintk("<-- nfs4_proc_destroy_session\n");
5518 return status;
5519}
5520
5521int nfs4_init_session(struct nfs_server *server)
5522{
5523 struct nfs_client *clp = server->nfs_client;
5524 struct nfs4_session *session;
5525 unsigned int rsize, wsize;
5526 int ret;
5527
5528 if (!nfs4_has_session(clp))
5529 return 0;
5530
5531 session = clp->cl_session;
5532 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5533 return 0;
5534
5535 rsize = server->rsize;
5536 if (rsize == 0)
5537 rsize = NFS_MAX_FILE_IO_SIZE;
5538 wsize = server->wsize;
5539 if (wsize == 0)
5540 wsize = NFS_MAX_FILE_IO_SIZE;
5541
5542 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5543 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5544
5545 ret = nfs4_recover_expired_lease(server);
5546 if (!ret)
5547 ret = nfs4_check_client_ready(clp);
5548 return ret;
5549}
5550
5551int nfs4_init_ds_session(struct nfs_client *clp)
5552{
5553 struct nfs4_session *session = clp->cl_session;
5554 int ret;
5555
5556 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5557 return 0;
5558
5559 ret = nfs4_client_recover_expired_lease(clp);
5560 if (!ret)
5561 /* Test for the DS role */
5562 if (!is_ds_client(clp))
5563 ret = -ENODEV;
5564 if (!ret)
5565 ret = nfs4_check_client_ready(clp);
5566 return ret;
5567
5568}
5569EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5570
5571
5572/*
5573 * Renew the cl_session lease.
5574 */
5575struct nfs4_sequence_data {
5576 struct nfs_client *clp;
5577 struct nfs4_sequence_args args;
5578 struct nfs4_sequence_res res;
5579};
5580
5581static void nfs41_sequence_release(void *data)
5582{
5583 struct nfs4_sequence_data *calldata = data;
5584 struct nfs_client *clp = calldata->clp;
5585
5586 if (atomic_read(&clp->cl_count) > 1)
5587 nfs4_schedule_state_renewal(clp);
5588 nfs_put_client(clp);
5589 kfree(calldata);
5590}
5591
5592static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5593{
5594 switch(task->tk_status) {
5595 case -NFS4ERR_DELAY:
5596 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5597 return -EAGAIN;
5598 default:
5599 nfs4_schedule_lease_recovery(clp);
5600 }
5601 return 0;
5602}
5603
5604static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5605{
5606 struct nfs4_sequence_data *calldata = data;
5607 struct nfs_client *clp = calldata->clp;
5608
5609 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5610 return;
5611
5612 if (task->tk_status < 0) {
5613 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5614 if (atomic_read(&clp->cl_count) == 1)
5615 goto out;
5616
5617 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5618 rpc_restart_call_prepare(task);
5619 return;
5620 }
5621 }
5622 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5623out:
5624 dprintk("<-- %s\n", __func__);
5625}
5626
5627static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5628{
5629 struct nfs4_sequence_data *calldata = data;
5630 struct nfs_client *clp = calldata->clp;
5631 struct nfs4_sequence_args *args;
5632 struct nfs4_sequence_res *res;
5633
5634 args = task->tk_msg.rpc_argp;
5635 res = task->tk_msg.rpc_resp;
5636
5637 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5638 return;
5639 rpc_call_start(task);
5640}
5641
5642static const struct rpc_call_ops nfs41_sequence_ops = {
5643 .rpc_call_done = nfs41_sequence_call_done,
5644 .rpc_call_prepare = nfs41_sequence_prepare,
5645 .rpc_release = nfs41_sequence_release,
5646};
5647
5648static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5649{
5650 struct nfs4_sequence_data *calldata;
5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5653 .rpc_cred = cred,
5654 };
5655 struct rpc_task_setup task_setup_data = {
5656 .rpc_client = clp->cl_rpcclient,
5657 .rpc_message = &msg,
5658 .callback_ops = &nfs41_sequence_ops,
5659 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5660 };
5661
5662 if (!atomic_inc_not_zero(&clp->cl_count))
5663 return ERR_PTR(-EIO);
5664 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5665 if (calldata == NULL) {
5666 nfs_put_client(clp);
5667 return ERR_PTR(-ENOMEM);
5668 }
5669 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5670 msg.rpc_argp = &calldata->args;
5671 msg.rpc_resp = &calldata->res;
5672 calldata->clp = clp;
5673 task_setup_data.callback_data = calldata;
5674
5675 return rpc_run_task(&task_setup_data);
5676}
5677
5678static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5679{
5680 struct rpc_task *task;
5681 int ret = 0;
5682
5683 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5684 return 0;
5685 task = _nfs41_proc_sequence(clp, cred);
5686 if (IS_ERR(task))
5687 ret = PTR_ERR(task);
5688 else
5689 rpc_put_task_async(task);
5690 dprintk("<-- %s status=%d\n", __func__, ret);
5691 return ret;
5692}
5693
5694static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5695{
5696 struct rpc_task *task;
5697 int ret;
5698
5699 task = _nfs41_proc_sequence(clp, cred);
5700 if (IS_ERR(task)) {
5701 ret = PTR_ERR(task);
5702 goto out;
5703 }
5704 ret = rpc_wait_for_completion_task(task);
5705 if (!ret) {
5706 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5707
5708 if (task->tk_status == 0)
5709 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5710 ret = task->tk_status;
5711 }
5712 rpc_put_task(task);
5713out:
5714 dprintk("<-- %s status=%d\n", __func__, ret);
5715 return ret;
5716}
5717
5718struct nfs4_reclaim_complete_data {
5719 struct nfs_client *clp;
5720 struct nfs41_reclaim_complete_args arg;
5721 struct nfs41_reclaim_complete_res res;
5722};
5723
5724static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5725{
5726 struct nfs4_reclaim_complete_data *calldata = data;
5727
5728 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5729 if (nfs41_setup_sequence(calldata->clp->cl_session,
5730 &calldata->arg.seq_args,
5731 &calldata->res.seq_res, task))
5732 return;
5733
5734 rpc_call_start(task);
5735}
5736
5737static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5738{
5739 switch(task->tk_status) {
5740 case 0:
5741 case -NFS4ERR_COMPLETE_ALREADY:
5742 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5743 break;
5744 case -NFS4ERR_DELAY:
5745 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5746 /* fall through */
5747 case -NFS4ERR_RETRY_UNCACHED_REP:
5748 return -EAGAIN;
5749 default:
5750 nfs4_schedule_lease_recovery(clp);
5751 }
5752 return 0;
5753}
5754
5755static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5756{
5757 struct nfs4_reclaim_complete_data *calldata = data;
5758 struct nfs_client *clp = calldata->clp;
5759 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5760
5761 dprintk("--> %s\n", __func__);
5762 if (!nfs41_sequence_done(task, res))
5763 return;
5764
5765 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5766 rpc_restart_call_prepare(task);
5767 return;
5768 }
5769 dprintk("<-- %s\n", __func__);
5770}
5771
5772static void nfs4_free_reclaim_complete_data(void *data)
5773{
5774 struct nfs4_reclaim_complete_data *calldata = data;
5775
5776 kfree(calldata);
5777}
5778
5779static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5780 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5781 .rpc_call_done = nfs4_reclaim_complete_done,
5782 .rpc_release = nfs4_free_reclaim_complete_data,
5783};
5784
5785/*
5786 * Issue a global reclaim complete.
5787 */
5788static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5789{
5790 struct nfs4_reclaim_complete_data *calldata;
5791 struct rpc_task *task;
5792 struct rpc_message msg = {
5793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5794 };
5795 struct rpc_task_setup task_setup_data = {
5796 .rpc_client = clp->cl_rpcclient,
5797 .rpc_message = &msg,
5798 .callback_ops = &nfs4_reclaim_complete_call_ops,
5799 .flags = RPC_TASK_ASYNC,
5800 };
5801 int status = -ENOMEM;
5802
5803 dprintk("--> %s\n", __func__);
5804 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5805 if (calldata == NULL)
5806 goto out;
5807 calldata->clp = clp;
5808 calldata->arg.one_fs = 0;
5809
5810 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5811 msg.rpc_argp = &calldata->arg;
5812 msg.rpc_resp = &calldata->res;
5813 task_setup_data.callback_data = calldata;
5814 task = rpc_run_task(&task_setup_data);
5815 if (IS_ERR(task)) {
5816 status = PTR_ERR(task);
5817 goto out;
5818 }
5819 status = nfs4_wait_for_completion_rpc_task(task);
5820 if (status == 0)
5821 status = task->tk_status;
5822 rpc_put_task(task);
5823 return 0;
5824out:
5825 dprintk("<-- %s status=%d\n", __func__, status);
5826 return status;
5827}
5828
5829static void
5830nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5831{
5832 struct nfs4_layoutget *lgp = calldata;
5833 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5834
5835 dprintk("--> %s\n", __func__);
5836 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5837 * right now covering the LAYOUTGET we are about to send.
5838 * However, that is not so catastrophic, and there seems
5839 * to be no way to prevent it completely.
5840 */
5841 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5842 &lgp->res.seq_res, task))
5843 return;
5844 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5845 NFS_I(lgp->args.inode)->layout,
5846 lgp->args.ctx->state)) {
5847 rpc_exit(task, NFS4_OK);
5848 return;
5849 }
5850 rpc_call_start(task);
5851}
5852
5853static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5854{
5855 struct nfs4_layoutget *lgp = calldata;
5856 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5857
5858 dprintk("--> %s\n", __func__);
5859
5860 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5861 return;
5862
5863 switch (task->tk_status) {
5864 case 0:
5865 break;
5866 case -NFS4ERR_LAYOUTTRYLATER:
5867 case -NFS4ERR_RECALLCONFLICT:
5868 task->tk_status = -NFS4ERR_DELAY;
5869 /* Fall through */
5870 default:
5871 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5872 rpc_restart_call_prepare(task);
5873 return;
5874 }
5875 }
5876 dprintk("<-- %s\n", __func__);
5877}
5878
5879static void nfs4_layoutget_release(void *calldata)
5880{
5881 struct nfs4_layoutget *lgp = calldata;
5882
5883 dprintk("--> %s\n", __func__);
5884 put_nfs_open_context(lgp->args.ctx);
5885 kfree(calldata);
5886 dprintk("<-- %s\n", __func__);
5887}
5888
5889static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5890 .rpc_call_prepare = nfs4_layoutget_prepare,
5891 .rpc_call_done = nfs4_layoutget_done,
5892 .rpc_release = nfs4_layoutget_release,
5893};
5894
5895int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5896{
5897 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5898 struct rpc_task *task;
5899 struct rpc_message msg = {
5900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5901 .rpc_argp = &lgp->args,
5902 .rpc_resp = &lgp->res,
5903 };
5904 struct rpc_task_setup task_setup_data = {
5905 .rpc_client = server->client,
5906 .rpc_message = &msg,
5907 .callback_ops = &nfs4_layoutget_call_ops,
5908 .callback_data = lgp,
5909 .flags = RPC_TASK_ASYNC,
5910 };
5911 int status = 0;
5912
5913 dprintk("--> %s\n", __func__);
5914
5915 lgp->res.layoutp = &lgp->args.layout;
5916 lgp->res.seq_res.sr_slot = NULL;
5917 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5918 task = rpc_run_task(&task_setup_data);
5919 if (IS_ERR(task))
5920 return PTR_ERR(task);
5921 status = nfs4_wait_for_completion_rpc_task(task);
5922 if (status == 0)
5923 status = task->tk_status;
5924 if (status == 0)
5925 status = pnfs_layout_process(lgp);
5926 rpc_put_task(task);
5927 dprintk("<-- %s status=%d\n", __func__, status);
5928 return status;
5929}
5930
5931static void
5932nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5933{
5934 struct nfs4_layoutreturn *lrp = calldata;
5935
5936 dprintk("--> %s\n", __func__);
5937 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5938 &lrp->res.seq_res, task))
5939 return;
5940 rpc_call_start(task);
5941}
5942
5943static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5944{
5945 struct nfs4_layoutreturn *lrp = calldata;
5946 struct nfs_server *server;
5947 struct pnfs_layout_hdr *lo = lrp->args.layout;
5948
5949 dprintk("--> %s\n", __func__);
5950
5951 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5952 return;
5953
5954 server = NFS_SERVER(lrp->args.inode);
5955 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5956 rpc_restart_call_prepare(task);
5957 return;
5958 }
5959 spin_lock(&lo->plh_inode->i_lock);
5960 if (task->tk_status == 0) {
5961 if (lrp->res.lrs_present) {
5962 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5963 } else
5964 BUG_ON(!list_empty(&lo->plh_segs));
5965 }
5966 lo->plh_block_lgets--;
5967 spin_unlock(&lo->plh_inode->i_lock);
5968 dprintk("<-- %s\n", __func__);
5969}
5970
5971static void nfs4_layoutreturn_release(void *calldata)
5972{
5973 struct nfs4_layoutreturn *lrp = calldata;
5974
5975 dprintk("--> %s\n", __func__);
5976 put_layout_hdr(lrp->args.layout);
5977 kfree(calldata);
5978 dprintk("<-- %s\n", __func__);
5979}
5980
5981static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5982 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5983 .rpc_call_done = nfs4_layoutreturn_done,
5984 .rpc_release = nfs4_layoutreturn_release,
5985};
5986
5987int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5988{
5989 struct rpc_task *task;
5990 struct rpc_message msg = {
5991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5992 .rpc_argp = &lrp->args,
5993 .rpc_resp = &lrp->res,
5994 };
5995 struct rpc_task_setup task_setup_data = {
5996 .rpc_client = lrp->clp->cl_rpcclient,
5997 .rpc_message = &msg,
5998 .callback_ops = &nfs4_layoutreturn_call_ops,
5999 .callback_data = lrp,
6000 };
6001 int status;
6002
6003 dprintk("--> %s\n", __func__);
6004 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6005 task = rpc_run_task(&task_setup_data);
6006 if (IS_ERR(task))
6007 return PTR_ERR(task);
6008 status = task->tk_status;
6009 dprintk("<-- %s status=%d\n", __func__, status);
6010 rpc_put_task(task);
6011 return status;
6012}
6013
6014/*
6015 * Retrieve the list of Data Server devices from the MDS.
6016 */
6017static int _nfs4_getdevicelist(struct nfs_server *server,
6018 const struct nfs_fh *fh,
6019 struct pnfs_devicelist *devlist)
6020{
6021 struct nfs4_getdevicelist_args args = {
6022 .fh = fh,
6023 .layoutclass = server->pnfs_curr_ld->id,
6024 };
6025 struct nfs4_getdevicelist_res res = {
6026 .devlist = devlist,
6027 };
6028 struct rpc_message msg = {
6029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6030 .rpc_argp = &args,
6031 .rpc_resp = &res,
6032 };
6033 int status;
6034
6035 dprintk("--> %s\n", __func__);
6036 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6037 &res.seq_res, 0);
6038 dprintk("<-- %s status=%d\n", __func__, status);
6039 return status;
6040}
6041
6042int nfs4_proc_getdevicelist(struct nfs_server *server,
6043 const struct nfs_fh *fh,
6044 struct pnfs_devicelist *devlist)
6045{
6046 struct nfs4_exception exception = { };
6047 int err;
6048
6049 do {
6050 err = nfs4_handle_exception(server,
6051 _nfs4_getdevicelist(server, fh, devlist),
6052 &exception);
6053 } while (exception.retry);
6054
6055 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6056 err, devlist->num_devs);
6057
6058 return err;
6059}
6060EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6061
6062static int
6063_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6064{
6065 struct nfs4_getdeviceinfo_args args = {
6066 .pdev = pdev,
6067 };
6068 struct nfs4_getdeviceinfo_res res = {
6069 .pdev = pdev,
6070 };
6071 struct rpc_message msg = {
6072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6073 .rpc_argp = &args,
6074 .rpc_resp = &res,
6075 };
6076 int status;
6077
6078 dprintk("--> %s\n", __func__);
6079 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6080 dprintk("<-- %s status=%d\n", __func__, status);
6081
6082 return status;
6083}
6084
6085int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6086{
6087 struct nfs4_exception exception = { };
6088 int err;
6089
6090 do {
6091 err = nfs4_handle_exception(server,
6092 _nfs4_proc_getdeviceinfo(server, pdev),
6093 &exception);
6094 } while (exception.retry);
6095 return err;
6096}
6097EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6098
6099static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6100{
6101 struct nfs4_layoutcommit_data *data = calldata;
6102 struct nfs_server *server = NFS_SERVER(data->args.inode);
6103
6104 if (nfs4_setup_sequence(server, &data->args.seq_args,
6105 &data->res.seq_res, task))
6106 return;
6107 rpc_call_start(task);
6108}
6109
6110static void
6111nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6112{
6113 struct nfs4_layoutcommit_data *data = calldata;
6114 struct nfs_server *server = NFS_SERVER(data->args.inode);
6115
6116 if (!nfs4_sequence_done(task, &data->res.seq_res))
6117 return;
6118
6119 switch (task->tk_status) { /* Just ignore these failures */
6120 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6121 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6122 case -NFS4ERR_BADLAYOUT: /* no layout */
6123 case -NFS4ERR_GRACE: /* loca_recalim always false */
6124 task->tk_status = 0;
6125 break;
6126 case 0:
6127 nfs_post_op_update_inode_force_wcc(data->args.inode,
6128 data->res.fattr);
6129 break;
6130 default:
6131 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6132 rpc_restart_call_prepare(task);
6133 return;
6134 }
6135 }
6136}
6137
6138static void nfs4_layoutcommit_release(void *calldata)
6139{
6140 struct nfs4_layoutcommit_data *data = calldata;
6141 struct pnfs_layout_segment *lseg, *tmp;
6142 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6143
6144 pnfs_cleanup_layoutcommit(data);
6145 /* Matched by references in pnfs_set_layoutcommit */
6146 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6147 list_del_init(&lseg->pls_lc_list);
6148 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6149 &lseg->pls_flags))
6150 put_lseg(lseg);
6151 }
6152
6153 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6154 smp_mb__after_clear_bit();
6155 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6156
6157 put_rpccred(data->cred);
6158 kfree(data);
6159}
6160
6161static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6162 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6163 .rpc_call_done = nfs4_layoutcommit_done,
6164 .rpc_release = nfs4_layoutcommit_release,
6165};
6166
6167int
6168nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6169{
6170 struct rpc_message msg = {
6171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6172 .rpc_argp = &data->args,
6173 .rpc_resp = &data->res,
6174 .rpc_cred = data->cred,
6175 };
6176 struct rpc_task_setup task_setup_data = {
6177 .task = &data->task,
6178 .rpc_client = NFS_CLIENT(data->args.inode),
6179 .rpc_message = &msg,
6180 .callback_ops = &nfs4_layoutcommit_ops,
6181 .callback_data = data,
6182 .flags = RPC_TASK_ASYNC,
6183 };
6184 struct rpc_task *task;
6185 int status = 0;
6186
6187 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6188 "lbw: %llu inode %lu\n",
6189 data->task.tk_pid, sync,
6190 data->args.lastbytewritten,
6191 data->args.inode->i_ino);
6192
6193 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6194 task = rpc_run_task(&task_setup_data);
6195 if (IS_ERR(task))
6196 return PTR_ERR(task);
6197 if (sync == false)
6198 goto out;
6199 status = nfs4_wait_for_completion_rpc_task(task);
6200 if (status != 0)
6201 goto out;
6202 status = task->tk_status;
6203out:
6204 dprintk("%s: status %d\n", __func__, status);
6205 rpc_put_task(task);
6206 return status;
6207}
6208
6209static int
6210_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6211 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6212{
6213 struct nfs41_secinfo_no_name_args args = {
6214 .style = SECINFO_STYLE_CURRENT_FH,
6215 };
6216 struct nfs4_secinfo_res res = {
6217 .flavors = flavors,
6218 };
6219 struct rpc_message msg = {
6220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6221 .rpc_argp = &args,
6222 .rpc_resp = &res,
6223 };
6224 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6225}
6226
6227static int
6228nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6229 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6230{
6231 struct nfs4_exception exception = { };
6232 int err;
6233 do {
6234 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6235 switch (err) {
6236 case 0:
6237 case -NFS4ERR_WRONGSEC:
6238 case -NFS4ERR_NOTSUPP:
6239 goto out;
6240 default:
6241 err = nfs4_handle_exception(server, err, &exception);
6242 }
6243 } while (exception.retry);
6244out:
6245 return err;
6246}
6247
6248static int
6249nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6250 struct nfs_fsinfo *info)
6251{
6252 int err;
6253 struct page *page;
6254 rpc_authflavor_t flavor;
6255 struct nfs4_secinfo_flavors *flavors;
6256
6257 page = alloc_page(GFP_KERNEL);
6258 if (!page) {
6259 err = -ENOMEM;
6260 goto out;
6261 }
6262
6263 flavors = page_address(page);
6264 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6265
6266 /*
6267 * Fall back on "guess and check" method if
6268 * the server doesn't support SECINFO_NO_NAME
6269 */
6270 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6271 err = nfs4_find_root_sec(server, fhandle, info);
6272 goto out_freepage;
6273 }
6274 if (err)
6275 goto out_freepage;
6276
6277 flavor = nfs_find_best_sec(flavors);
6278 if (err == 0)
6279 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6280
6281out_freepage:
6282 put_page(page);
6283 if (err == -EACCES)
6284 return -EPERM;
6285out:
6286 return err;
6287}
6288
6289static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6290{
6291 int status;
6292 struct nfs41_test_stateid_args args = {
6293 .stateid = stateid,
6294 };
6295 struct nfs41_test_stateid_res res;
6296 struct rpc_message msg = {
6297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6298 .rpc_argp = &args,
6299 .rpc_resp = &res,
6300 };
6301
6302 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6303 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6304
6305 if (status == NFS_OK)
6306 return res.status;
6307 return status;
6308}
6309
6310static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6311{
6312 struct nfs4_exception exception = { };
6313 int err;
6314 do {
6315 err = nfs4_handle_exception(server,
6316 _nfs41_test_stateid(server, stateid),
6317 &exception);
6318 } while (exception.retry);
6319 return err;
6320}
6321
6322static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6323{
6324 struct nfs41_free_stateid_args args = {
6325 .stateid = stateid,
6326 };
6327 struct nfs41_free_stateid_res res;
6328 struct rpc_message msg = {
6329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6330 .rpc_argp = &args,
6331 .rpc_resp = &res,
6332 };
6333
6334 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6335 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6336}
6337
6338static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6339{
6340 struct nfs4_exception exception = { };
6341 int err;
6342 do {
6343 err = nfs4_handle_exception(server,
6344 _nfs4_free_stateid(server, stateid),
6345 &exception);
6346 } while (exception.retry);
6347 return err;
6348}
6349
6350static bool nfs41_match_stateid(const nfs4_stateid *s1,
6351 const nfs4_stateid *s2)
6352{
6353 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6354 return false;
6355
6356 if (s1->seqid == s2->seqid)
6357 return true;
6358 if (s1->seqid == 0 || s2->seqid == 0)
6359 return true;
6360
6361 return false;
6362}
6363
6364#endif /* CONFIG_NFS_V4_1 */
6365
6366static bool nfs4_match_stateid(const nfs4_stateid *s1,
6367 const nfs4_stateid *s2)
6368{
6369 return nfs4_stateid_match(s1, s2);
6370}
6371
6372
6373static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6374 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6375 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6376 .recover_open = nfs4_open_reclaim,
6377 .recover_lock = nfs4_lock_reclaim,
6378 .establish_clid = nfs4_init_clientid,
6379 .get_clid_cred = nfs4_get_setclientid_cred,
6380};
6381
6382#if defined(CONFIG_NFS_V4_1)
6383static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6384 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6385 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6386 .recover_open = nfs4_open_reclaim,
6387 .recover_lock = nfs4_lock_reclaim,
6388 .establish_clid = nfs41_init_clientid,
6389 .get_clid_cred = nfs4_get_exchange_id_cred,
6390 .reclaim_complete = nfs41_proc_reclaim_complete,
6391};
6392#endif /* CONFIG_NFS_V4_1 */
6393
6394static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6395 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6396 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6397 .recover_open = nfs4_open_expired,
6398 .recover_lock = nfs4_lock_expired,
6399 .establish_clid = nfs4_init_clientid,
6400 .get_clid_cred = nfs4_get_setclientid_cred,
6401};
6402
6403#if defined(CONFIG_NFS_V4_1)
6404static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6405 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6406 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6407 .recover_open = nfs41_open_expired,
6408 .recover_lock = nfs41_lock_expired,
6409 .establish_clid = nfs41_init_clientid,
6410 .get_clid_cred = nfs4_get_exchange_id_cred,
6411};
6412#endif /* CONFIG_NFS_V4_1 */
6413
6414static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6415 .sched_state_renewal = nfs4_proc_async_renew,
6416 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6417 .renew_lease = nfs4_proc_renew,
6418};
6419
6420#if defined(CONFIG_NFS_V4_1)
6421static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6422 .sched_state_renewal = nfs41_proc_async_sequence,
6423 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6424 .renew_lease = nfs4_proc_sequence,
6425};
6426#endif
6427
6428static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6429 .minor_version = 0,
6430 .call_sync = _nfs4_call_sync,
6431 .match_stateid = nfs4_match_stateid,
6432 .find_root_sec = nfs4_find_root_sec,
6433 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6434 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6435 .state_renewal_ops = &nfs40_state_renewal_ops,
6436};
6437
6438#if defined(CONFIG_NFS_V4_1)
6439static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6440 .minor_version = 1,
6441 .call_sync = _nfs4_call_sync_session,
6442 .match_stateid = nfs41_match_stateid,
6443 .find_root_sec = nfs41_find_root_sec,
6444 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6445 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6446 .state_renewal_ops = &nfs41_state_renewal_ops,
6447};
6448#endif
6449
6450const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6451 [0] = &nfs_v4_0_minor_ops,
6452#if defined(CONFIG_NFS_V4_1)
6453 [1] = &nfs_v4_1_minor_ops,
6454#endif
6455};
6456
6457static const struct inode_operations nfs4_file_inode_operations = {
6458 .permission = nfs_permission,
6459 .getattr = nfs_getattr,
6460 .setattr = nfs_setattr,
6461 .getxattr = generic_getxattr,
6462 .setxattr = generic_setxattr,
6463 .listxattr = generic_listxattr,
6464 .removexattr = generic_removexattr,
6465};
6466
6467const struct nfs_rpc_ops nfs_v4_clientops = {
6468 .version = 4, /* protocol version */
6469 .dentry_ops = &nfs4_dentry_operations,
6470 .dir_inode_ops = &nfs4_dir_inode_operations,
6471 .file_inode_ops = &nfs4_file_inode_operations,
6472 .file_ops = &nfs4_file_operations,
6473 .getroot = nfs4_proc_get_root,
6474 .getattr = nfs4_proc_getattr,
6475 .setattr = nfs4_proc_setattr,
6476 .lookup = nfs4_proc_lookup,
6477 .access = nfs4_proc_access,
6478 .readlink = nfs4_proc_readlink,
6479 .create = nfs4_proc_create,
6480 .remove = nfs4_proc_remove,
6481 .unlink_setup = nfs4_proc_unlink_setup,
6482 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6483 .unlink_done = nfs4_proc_unlink_done,
6484 .rename = nfs4_proc_rename,
6485 .rename_setup = nfs4_proc_rename_setup,
6486 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6487 .rename_done = nfs4_proc_rename_done,
6488 .link = nfs4_proc_link,
6489 .symlink = nfs4_proc_symlink,
6490 .mkdir = nfs4_proc_mkdir,
6491 .rmdir = nfs4_proc_remove,
6492 .readdir = nfs4_proc_readdir,
6493 .mknod = nfs4_proc_mknod,
6494 .statfs = nfs4_proc_statfs,
6495 .fsinfo = nfs4_proc_fsinfo,
6496 .pathconf = nfs4_proc_pathconf,
6497 .set_capabilities = nfs4_server_capabilities,
6498 .decode_dirent = nfs4_decode_dirent,
6499 .read_setup = nfs4_proc_read_setup,
6500 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6501 .read_done = nfs4_read_done,
6502 .write_setup = nfs4_proc_write_setup,
6503 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6504 .write_done = nfs4_write_done,
6505 .commit_setup = nfs4_proc_commit_setup,
6506 .commit_done = nfs4_commit_done,
6507 .lock = nfs4_proc_lock,
6508 .clear_acl_cache = nfs4_zap_acl_attr,
6509 .close_context = nfs4_close_context,
6510 .open_context = nfs4_atomic_open,
6511 .init_client = nfs4_init_client,
6512 .secinfo = nfs4_proc_secinfo,
6513};
6514
6515static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6516 .prefix = XATTR_NAME_NFSV4_ACL,
6517 .list = nfs4_xattr_list_nfs4_acl,
6518 .get = nfs4_xattr_get_nfs4_acl,
6519 .set = nfs4_xattr_set_nfs4_acl,
6520};
6521
6522const struct xattr_handler *nfs4_xattr_handlers[] = {
6523 &nfs4_xattr_nfs4_acl_handler,
6524 NULL
6525};
6526
6527module_param(max_session_slots, ushort, 0644);
6528MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6529 "requests the client will negotiate");
6530
6531/*
6532 * Local variables:
6533 * c-basic-offset: 8
6534 * End:
6535 */
Linux 6.x block layer and io_uring tree(s)