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NFS: Clean up debugging in decode_pathname()
[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 int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86#ifdef CONFIG_NFS_V4_1
87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
89#endif
90/* Prevent leaks of NFSv4 errors into userland */
91static int nfs4_map_errors(int err)
92{
93 if (err >= -1000)
94 return err;
95 switch (err) {
96 case -NFS4ERR_RESOURCE:
97 return -EREMOTEIO;
98 case -NFS4ERR_WRONGSEC:
99 return -EPERM;
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
102 return -EINVAL;
103 default:
104 dprintk("%s could not handle NFSv4 error %d\n",
105 __func__, -err);
106 break;
107 }
108 return -EIO;
109}
110
111/*
112 * This is our standard bitmap for GETATTR requests.
113 */
114const u32 nfs4_fattr_bitmap[2] = {
115 FATTR4_WORD0_TYPE
116 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_SIZE
118 | FATTR4_WORD0_FSID
119 | FATTR4_WORD0_FILEID,
120 FATTR4_WORD1_MODE
121 | FATTR4_WORD1_NUMLINKS
122 | FATTR4_WORD1_OWNER
123 | FATTR4_WORD1_OWNER_GROUP
124 | FATTR4_WORD1_RAWDEV
125 | FATTR4_WORD1_SPACE_USED
126 | FATTR4_WORD1_TIME_ACCESS
127 | FATTR4_WORD1_TIME_METADATA
128 | FATTR4_WORD1_TIME_MODIFY
129};
130
131const u32 nfs4_statfs_bitmap[2] = {
132 FATTR4_WORD0_FILES_AVAIL
133 | FATTR4_WORD0_FILES_FREE
134 | FATTR4_WORD0_FILES_TOTAL,
135 FATTR4_WORD1_SPACE_AVAIL
136 | FATTR4_WORD1_SPACE_FREE
137 | FATTR4_WORD1_SPACE_TOTAL
138};
139
140const u32 nfs4_pathconf_bitmap[2] = {
141 FATTR4_WORD0_MAXLINK
142 | FATTR4_WORD0_MAXNAME,
143 0
144};
145
146const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
147 | FATTR4_WORD0_MAXREAD
148 | FATTR4_WORD0_MAXWRITE
149 | FATTR4_WORD0_LEASE_TIME,
150 FATTR4_WORD1_TIME_DELTA
151 | FATTR4_WORD1_FS_LAYOUT_TYPES,
152 FATTR4_WORD2_LAYOUT_BLKSIZE
153};
154
155const u32 nfs4_fs_locations_bitmap[2] = {
156 FATTR4_WORD0_TYPE
157 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_SIZE
159 | FATTR4_WORD0_FSID
160 | FATTR4_WORD0_FILEID
161 | FATTR4_WORD0_FS_LOCATIONS,
162 FATTR4_WORD1_MODE
163 | FATTR4_WORD1_NUMLINKS
164 | FATTR4_WORD1_OWNER
165 | FATTR4_WORD1_OWNER_GROUP
166 | FATTR4_WORD1_RAWDEV
167 | FATTR4_WORD1_SPACE_USED
168 | FATTR4_WORD1_TIME_ACCESS
169 | FATTR4_WORD1_TIME_METADATA
170 | FATTR4_WORD1_TIME_MODIFY
171 | FATTR4_WORD1_MOUNTED_ON_FILEID
172};
173
174static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
175 struct nfs4_readdir_arg *readdir)
176{
177 __be32 *start, *p;
178
179 BUG_ON(readdir->count < 80);
180 if (cookie > 2) {
181 readdir->cookie = cookie;
182 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
183 return;
184 }
185
186 readdir->cookie = 0;
187 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
188 if (cookie == 2)
189 return;
190
191 /*
192 * NFSv4 servers do not return entries for '.' and '..'
193 * Therefore, we fake these entries here. We let '.'
194 * have cookie 0 and '..' have cookie 1. Note that
195 * when talking to the server, we always send cookie 0
196 * instead of 1 or 2.
197 */
198 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199
200 if (cookie == 0) {
201 *p++ = xdr_one; /* next */
202 *p++ = xdr_zero; /* cookie, first word */
203 *p++ = xdr_one; /* cookie, second word */
204 *p++ = xdr_one; /* entry len */
205 memcpy(p, ".\0\0\0", 4); /* entry */
206 p++;
207 *p++ = xdr_one; /* bitmap length */
208 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
209 *p++ = htonl(8); /* attribute buffer length */
210 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 }
212
213 *p++ = xdr_one; /* next */
214 *p++ = xdr_zero; /* cookie, first word */
215 *p++ = xdr_two; /* cookie, second word */
216 *p++ = xdr_two; /* entry len */
217 memcpy(p, "..\0\0", 4); /* entry */
218 p++;
219 *p++ = xdr_one; /* bitmap length */
220 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
221 *p++ = htonl(8); /* attribute buffer length */
222 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
223
224 readdir->pgbase = (char *)p - (char *)start;
225 readdir->count -= readdir->pgbase;
226 kunmap_atomic(start, KM_USER0);
227}
228
229static int nfs4_wait_clnt_recover(struct nfs_client *clp)
230{
231 int res;
232
233 might_sleep();
234
235 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
236 nfs_wait_bit_killable, TASK_KILLABLE);
237 return res;
238}
239
240static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
241{
242 int res = 0;
243
244 might_sleep();
245
246 if (*timeout <= 0)
247 *timeout = NFS4_POLL_RETRY_MIN;
248 if (*timeout > NFS4_POLL_RETRY_MAX)
249 *timeout = NFS4_POLL_RETRY_MAX;
250 freezable_schedule_timeout_killable(*timeout);
251 if (fatal_signal_pending(current))
252 res = -ERESTARTSYS;
253 *timeout <<= 1;
254 return res;
255}
256
257/* This is the error handling routine for processes that are allowed
258 * to sleep.
259 */
260static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
261{
262 struct nfs_client *clp = server->nfs_client;
263 struct nfs4_state *state = exception->state;
264 int ret = errorcode;
265
266 exception->retry = 0;
267 switch(errorcode) {
268 case 0:
269 return 0;
270 case -NFS4ERR_ADMIN_REVOKED:
271 case -NFS4ERR_BAD_STATEID:
272 case -NFS4ERR_OPENMODE:
273 if (state == NULL)
274 break;
275 nfs4_schedule_stateid_recovery(server, state);
276 goto wait_on_recovery;
277 case -NFS4ERR_EXPIRED:
278 if (state != NULL)
279 nfs4_schedule_stateid_recovery(server, state);
280 case -NFS4ERR_STALE_STATEID:
281 case -NFS4ERR_STALE_CLIENTID:
282 nfs4_schedule_lease_recovery(clp);
283 goto wait_on_recovery;
284#if defined(CONFIG_NFS_V4_1)
285 case -NFS4ERR_BADSESSION:
286 case -NFS4ERR_BADSLOT:
287 case -NFS4ERR_BAD_HIGH_SLOT:
288 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
289 case -NFS4ERR_DEADSESSION:
290 case -NFS4ERR_SEQ_FALSE_RETRY:
291 case -NFS4ERR_SEQ_MISORDERED:
292 dprintk("%s ERROR: %d Reset session\n", __func__,
293 errorcode);
294 nfs4_schedule_session_recovery(clp->cl_session);
295 exception->retry = 1;
296 break;
297#endif /* defined(CONFIG_NFS_V4_1) */
298 case -NFS4ERR_FILE_OPEN:
299 if (exception->timeout > HZ) {
300 /* We have retried a decent amount, time to
301 * fail
302 */
303 ret = -EBUSY;
304 break;
305 }
306 case -NFS4ERR_GRACE:
307 case -NFS4ERR_DELAY:
308 case -EKEYEXPIRED:
309 ret = nfs4_delay(server->client, &exception->timeout);
310 if (ret != 0)
311 break;
312 case -NFS4ERR_RETRY_UNCACHED_REP:
313 case -NFS4ERR_OLD_STATEID:
314 exception->retry = 1;
315 break;
316 case -NFS4ERR_BADOWNER:
317 /* The following works around a Linux server bug! */
318 case -NFS4ERR_BADNAME:
319 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
320 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
321 exception->retry = 1;
322 printk(KERN_WARNING "NFS: v4 server %s "
323 "does not accept raw "
324 "uid/gids. "
325 "Reenabling the idmapper.\n",
326 server->nfs_client->cl_hostname);
327 }
328 }
329 /* We failed to handle the error */
330 return nfs4_map_errors(ret);
331wait_on_recovery:
332 ret = nfs4_wait_clnt_recover(clp);
333 if (ret == 0)
334 exception->retry = 1;
335 return ret;
336}
337
338
339static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
340{
341 spin_lock(&clp->cl_lock);
342 if (time_before(clp->cl_last_renewal,timestamp))
343 clp->cl_last_renewal = timestamp;
344 spin_unlock(&clp->cl_lock);
345}
346
347static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
348{
349 do_renew_lease(server->nfs_client, timestamp);
350}
351
352#if defined(CONFIG_NFS_V4_1)
353
354/*
355 * nfs4_free_slot - free a slot and efficiently update slot table.
356 *
357 * freeing a slot is trivially done by clearing its respective bit
358 * in the bitmap.
359 * If the freed slotid equals highest_used_slotid we want to update it
360 * so that the server would be able to size down the slot table if needed,
361 * otherwise we know that the highest_used_slotid is still in use.
362 * When updating highest_used_slotid there may be "holes" in the bitmap
363 * so we need to scan down from highest_used_slotid to 0 looking for the now
364 * highest slotid in use.
365 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
366 *
367 * Must be called while holding tbl->slot_tbl_lock
368 */
369static void
370nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
371{
372 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
375
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
379 if (slotid < tbl->max_slots)
380 tbl->highest_used_slotid = slotid;
381 else
382 tbl->highest_used_slotid = NFS4_NO_SLOT;
383 }
384 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
385 slotid, tbl->highest_used_slotid);
386}
387
388bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
389{
390 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
391 return true;
392}
393
394/*
395 * Signal state manager thread if session fore channel is drained
396 */
397static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
398{
399 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
400 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
401 nfs4_set_task_privileged, NULL);
402 return;
403 }
404
405 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
406 return;
407
408 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
409 complete(&ses->fc_slot_table.complete);
410}
411
412/*
413 * Signal state manager thread if session back channel is drained
414 */
415void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
416{
417 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
418 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
419 return;
420 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
421 complete(&ses->bc_slot_table.complete);
422}
423
424static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
425{
426 struct nfs4_slot_table *tbl;
427
428 tbl = &res->sr_session->fc_slot_table;
429 if (!res->sr_slot) {
430 /* just wake up the next guy waiting since
431 * we may have not consumed a slot after all */
432 dprintk("%s: No slot\n", __func__);
433 return;
434 }
435
436 spin_lock(&tbl->slot_tbl_lock);
437 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
438 nfs4_check_drain_fc_complete(res->sr_session);
439 spin_unlock(&tbl->slot_tbl_lock);
440 res->sr_slot = NULL;
441}
442
443static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
444{
445 unsigned long timestamp;
446 struct nfs_client *clp;
447
448 /*
449 * sr_status remains 1 if an RPC level error occurred. The server
450 * may or may not have processed the sequence operation..
451 * Proceed as if the server received and processed the sequence
452 * operation.
453 */
454 if (res->sr_status == 1)
455 res->sr_status = NFS_OK;
456
457 /* don't increment the sequence number if the task wasn't sent */
458 if (!RPC_WAS_SENT(task))
459 goto out;
460
461 /* Check the SEQUENCE operation status */
462 switch (res->sr_status) {
463 case 0:
464 /* Update the slot's sequence and clientid lease timer */
465 ++res->sr_slot->seq_nr;
466 timestamp = res->sr_renewal_time;
467 clp = res->sr_session->clp;
468 do_renew_lease(clp, timestamp);
469 /* Check sequence flags */
470 if (res->sr_status_flags != 0)
471 nfs4_schedule_lease_recovery(clp);
472 break;
473 case -NFS4ERR_DELAY:
474 /* The server detected a resend of the RPC call and
475 * returned NFS4ERR_DELAY as per Section 2.10.6.2
476 * of RFC5661.
477 */
478 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
479 __func__,
480 res->sr_slot - res->sr_session->fc_slot_table.slots,
481 res->sr_slot->seq_nr);
482 goto out_retry;
483 default:
484 /* Just update the slot sequence no. */
485 ++res->sr_slot->seq_nr;
486 }
487out:
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
490 nfs41_sequence_free_slot(res);
491 return 1;
492out_retry:
493 if (!rpc_restart_call(task))
494 goto out;
495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
496 return 0;
497}
498
499static int nfs4_sequence_done(struct rpc_task *task,
500 struct nfs4_sequence_res *res)
501{
502 if (res->sr_session == NULL)
503 return 1;
504 return nfs41_sequence_done(task, res);
505}
506
507/*
508 * nfs4_find_slot - efficiently look for a free slot
509 *
510 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
511 * If found, we mark the slot as used, update the highest_used_slotid,
512 * and respectively set up the sequence operation args.
513 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
514 *
515 * Note: must be called with under the slot_tbl_lock.
516 */
517static u32
518nfs4_find_slot(struct nfs4_slot_table *tbl)
519{
520 u32 slotid;
521 u32 ret_id = NFS4_NO_SLOT;
522
523 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
524 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
525 tbl->max_slots);
526 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
527 if (slotid >= tbl->max_slots)
528 goto out;
529 __set_bit(slotid, tbl->used_slots);
530 if (slotid > tbl->highest_used_slotid ||
531 tbl->highest_used_slotid == NFS4_NO_SLOT)
532 tbl->highest_used_slotid = slotid;
533 ret_id = slotid;
534out:
535 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
536 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
537 return ret_id;
538}
539
540static void nfs41_init_sequence(struct nfs4_sequence_args *args,
541 struct nfs4_sequence_res *res, int cache_reply)
542{
543 args->sa_session = NULL;
544 args->sa_cache_this = 0;
545 if (cache_reply)
546 args->sa_cache_this = 1;
547 res->sr_session = NULL;
548 res->sr_slot = NULL;
549}
550
551int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
555{
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
558 u32 slotid;
559
560 dprintk("--> %s\n", __func__);
561 /* slot already allocated? */
562 if (res->sr_slot != NULL)
563 return 0;
564
565 tbl = &session->fc_slot_table;
566
567 spin_lock(&tbl->slot_tbl_lock);
568 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
569 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
570 /* The state manager will wait until the slot table is empty */
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("%s session is draining\n", __func__);
574 return -EAGAIN;
575 }
576
577 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
578 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
579 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
580 spin_unlock(&tbl->slot_tbl_lock);
581 dprintk("%s enforce FIFO order\n", __func__);
582 return -EAGAIN;
583 }
584
585 slotid = nfs4_find_slot(tbl);
586 if (slotid == NFS4_NO_SLOT) {
587 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
588 spin_unlock(&tbl->slot_tbl_lock);
589 dprintk("<-- %s: no free slots\n", __func__);
590 return -EAGAIN;
591 }
592 spin_unlock(&tbl->slot_tbl_lock);
593
594 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
595 slot = tbl->slots + slotid;
596 args->sa_session = session;
597 args->sa_slotid = slotid;
598
599 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
600
601 res->sr_session = session;
602 res->sr_slot = slot;
603 res->sr_renewal_time = jiffies;
604 res->sr_status_flags = 0;
605 /*
606 * sr_status is only set in decode_sequence, and so will remain
607 * set to 1 if an rpc level failure occurs.
608 */
609 res->sr_status = 1;
610 return 0;
611}
612EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
613
614int nfs4_setup_sequence(const struct nfs_server *server,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 struct rpc_task *task)
618{
619 struct nfs4_session *session = nfs4_get_session(server);
620 int ret = 0;
621
622 if (session == NULL)
623 goto out;
624
625 dprintk("--> %s clp %p session %p sr_slot %td\n",
626 __func__, session->clp, session, res->sr_slot ?
627 res->sr_slot - session->fc_slot_table.slots : -1);
628
629 ret = nfs41_setup_sequence(session, args, res, task);
630out:
631 dprintk("<-- %s status=%d\n", __func__, ret);
632 return ret;
633}
634
635struct nfs41_call_sync_data {
636 const struct nfs_server *seq_server;
637 struct nfs4_sequence_args *seq_args;
638 struct nfs4_sequence_res *seq_res;
639};
640
641static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
642{
643 struct nfs41_call_sync_data *data = calldata;
644
645 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
646
647 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
648 data->seq_res, task))
649 return;
650 rpc_call_start(task);
651}
652
653static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
654{
655 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
656 nfs41_call_sync_prepare(task, calldata);
657}
658
659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
663 nfs41_sequence_done(task, data->seq_res);
664}
665
666struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
669};
670
671struct rpc_call_ops nfs41_call_priv_sync_ops = {
672 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
673 .rpc_call_done = nfs41_call_sync_done,
674};
675
676static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
677 struct nfs_server *server,
678 struct rpc_message *msg,
679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
681 int privileged)
682{
683 int ret;
684 struct rpc_task *task;
685 struct nfs41_call_sync_data data = {
686 .seq_server = server,
687 .seq_args = args,
688 .seq_res = res,
689 };
690 struct rpc_task_setup task_setup = {
691 .rpc_client = clnt,
692 .rpc_message = msg,
693 .callback_ops = &nfs41_call_sync_ops,
694 .callback_data = &data
695 };
696
697 if (privileged)
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
699 task = rpc_run_task(&task_setup);
700 if (IS_ERR(task))
701 ret = PTR_ERR(task);
702 else {
703 ret = task->tk_status;
704 rpc_put_task(task);
705 }
706 return ret;
707}
708
709int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
714 int cache_reply)
715{
716 nfs41_init_sequence(args, res, cache_reply);
717 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
718}
719
720#else
721static inline
722void nfs41_init_sequence(struct nfs4_sequence_args *args,
723 struct nfs4_sequence_res *res, int cache_reply)
724{
725}
726
727static int nfs4_sequence_done(struct rpc_task *task,
728 struct nfs4_sequence_res *res)
729{
730 return 1;
731}
732#endif /* CONFIG_NFS_V4_1 */
733
734int _nfs4_call_sync(struct rpc_clnt *clnt,
735 struct nfs_server *server,
736 struct rpc_message *msg,
737 struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res,
739 int cache_reply)
740{
741 nfs41_init_sequence(args, res, cache_reply);
742 return rpc_call_sync(clnt, msg, 0);
743}
744
745static inline
746int nfs4_call_sync(struct rpc_clnt *clnt,
747 struct nfs_server *server,
748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
751 int cache_reply)
752{
753 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
754 args, res, cache_reply);
755}
756
757static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
758{
759 struct nfs_inode *nfsi = NFS_I(dir);
760
761 spin_lock(&dir->i_lock);
762 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
763 if (!cinfo->atomic || cinfo->before != dir->i_version)
764 nfs_force_lookup_revalidate(dir);
765 dir->i_version = cinfo->after;
766 spin_unlock(&dir->i_lock);
767}
768
769struct nfs4_opendata {
770 struct kref kref;
771 struct nfs_openargs o_arg;
772 struct nfs_openres o_res;
773 struct nfs_open_confirmargs c_arg;
774 struct nfs_open_confirmres c_res;
775 struct nfs4_string owner_name;
776 struct nfs4_string group_name;
777 struct nfs_fattr f_attr;
778 struct nfs_fattr dir_attr;
779 struct dentry *dir;
780 struct dentry *dentry;
781 struct nfs4_state_owner *owner;
782 struct nfs4_state *state;
783 struct iattr attrs;
784 unsigned long timestamp;
785 unsigned int rpc_done : 1;
786 int rpc_status;
787 int cancelled;
788};
789
790
791static void nfs4_init_opendata_res(struct nfs4_opendata *p)
792{
793 p->o_res.f_attr = &p->f_attr;
794 p->o_res.dir_attr = &p->dir_attr;
795 p->o_res.seqid = p->o_arg.seqid;
796 p->c_res.seqid = p->c_arg.seqid;
797 p->o_res.server = p->o_arg.server;
798 nfs_fattr_init(&p->f_attr);
799 nfs_fattr_init(&p->dir_attr);
800 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
801}
802
803static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
804 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
805 const struct iattr *attrs,
806 gfp_t gfp_mask)
807{
808 struct dentry *parent = dget_parent(dentry);
809 struct inode *dir = parent->d_inode;
810 struct nfs_server *server = NFS_SERVER(dir);
811 struct nfs4_opendata *p;
812
813 p = kzalloc(sizeof(*p), gfp_mask);
814 if (p == NULL)
815 goto err;
816 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
817 if (p->o_arg.seqid == NULL)
818 goto err_free;
819 nfs_sb_active(dentry->d_sb);
820 p->dentry = dget(dentry);
821 p->dir = parent;
822 p->owner = sp;
823 atomic_inc(&sp->so_count);
824 p->o_arg.fh = NFS_FH(dir);
825 p->o_arg.open_flags = flags;
826 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
827 p->o_arg.clientid = server->nfs_client->cl_clientid;
828 p->o_arg.id = sp->so_seqid.owner_id;
829 p->o_arg.name = &dentry->d_name;
830 p->o_arg.server = server;
831 p->o_arg.bitmask = server->attr_bitmask;
832 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
833 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
834 if (attrs != NULL && attrs->ia_valid != 0) {
835 u32 *s;
836
837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
839 s = (u32 *) p->o_arg.u.verifier.data;
840 s[0] = jiffies;
841 s[1] = current->pid;
842 }
843 p->c_arg.fh = &p->o_res.fh;
844 p->c_arg.stateid = &p->o_res.stateid;
845 p->c_arg.seqid = p->o_arg.seqid;
846 nfs4_init_opendata_res(p);
847 kref_init(&p->kref);
848 return p;
849err_free:
850 kfree(p);
851err:
852 dput(parent);
853 return NULL;
854}
855
856static void nfs4_opendata_free(struct kref *kref)
857{
858 struct nfs4_opendata *p = container_of(kref,
859 struct nfs4_opendata, kref);
860 struct super_block *sb = p->dentry->d_sb;
861
862 nfs_free_seqid(p->o_arg.seqid);
863 if (p->state != NULL)
864 nfs4_put_open_state(p->state);
865 nfs4_put_state_owner(p->owner);
866 dput(p->dir);
867 dput(p->dentry);
868 nfs_sb_deactive(sb);
869 nfs_fattr_free_names(&p->f_attr);
870 kfree(p);
871}
872
873static void nfs4_opendata_put(struct nfs4_opendata *p)
874{
875 if (p != NULL)
876 kref_put(&p->kref, nfs4_opendata_free);
877}
878
879static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
880{
881 int ret;
882
883 ret = rpc_wait_for_completion_task(task);
884 return ret;
885}
886
887static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
888{
889 int ret = 0;
890
891 if (open_mode & (O_EXCL|O_TRUNC))
892 goto out;
893 switch (mode & (FMODE_READ|FMODE_WRITE)) {
894 case FMODE_READ:
895 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
896 && state->n_rdonly != 0;
897 break;
898 case FMODE_WRITE:
899 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
900 && state->n_wronly != 0;
901 break;
902 case FMODE_READ|FMODE_WRITE:
903 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
904 && state->n_rdwr != 0;
905 }
906out:
907 return ret;
908}
909
910static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
911{
912 if (delegation == NULL)
913 return 0;
914 if ((delegation->type & fmode) != fmode)
915 return 0;
916 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
917 return 0;
918 nfs_mark_delegation_referenced(delegation);
919 return 1;
920}
921
922static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
923{
924 switch (fmode) {
925 case FMODE_WRITE:
926 state->n_wronly++;
927 break;
928 case FMODE_READ:
929 state->n_rdonly++;
930 break;
931 case FMODE_READ|FMODE_WRITE:
932 state->n_rdwr++;
933 }
934 nfs4_state_set_mode_locked(state, state->state | fmode);
935}
936
937static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
938{
939 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
940 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
941 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
942 switch (fmode) {
943 case FMODE_READ:
944 set_bit(NFS_O_RDONLY_STATE, &state->flags);
945 break;
946 case FMODE_WRITE:
947 set_bit(NFS_O_WRONLY_STATE, &state->flags);
948 break;
949 case FMODE_READ|FMODE_WRITE:
950 set_bit(NFS_O_RDWR_STATE, &state->flags);
951 }
952}
953
954static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
955{
956 write_seqlock(&state->seqlock);
957 nfs_set_open_stateid_locked(state, stateid, fmode);
958 write_sequnlock(&state->seqlock);
959}
960
961static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
962{
963 /*
964 * Protect the call to nfs4_state_set_mode_locked and
965 * serialise the stateid update
966 */
967 write_seqlock(&state->seqlock);
968 if (deleg_stateid != NULL) {
969 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
970 set_bit(NFS_DELEGATED_STATE, &state->flags);
971 }
972 if (open_stateid != NULL)
973 nfs_set_open_stateid_locked(state, open_stateid, fmode);
974 write_sequnlock(&state->seqlock);
975 spin_lock(&state->owner->so_lock);
976 update_open_stateflags(state, fmode);
977 spin_unlock(&state->owner->so_lock);
978}
979
980static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
981{
982 struct nfs_inode *nfsi = NFS_I(state->inode);
983 struct nfs_delegation *deleg_cur;
984 int ret = 0;
985
986 fmode &= (FMODE_READ|FMODE_WRITE);
987
988 rcu_read_lock();
989 deleg_cur = rcu_dereference(nfsi->delegation);
990 if (deleg_cur == NULL)
991 goto no_delegation;
992
993 spin_lock(&deleg_cur->lock);
994 if (nfsi->delegation != deleg_cur ||
995 (deleg_cur->type & fmode) != fmode)
996 goto no_delegation_unlock;
997
998 if (delegation == NULL)
999 delegation = &deleg_cur->stateid;
1000 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1001 goto no_delegation_unlock;
1002
1003 nfs_mark_delegation_referenced(deleg_cur);
1004 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1005 ret = 1;
1006no_delegation_unlock:
1007 spin_unlock(&deleg_cur->lock);
1008no_delegation:
1009 rcu_read_unlock();
1010
1011 if (!ret && open_stateid != NULL) {
1012 __update_open_stateid(state, open_stateid, NULL, fmode);
1013 ret = 1;
1014 }
1015
1016 return ret;
1017}
1018
1019
1020static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1021{
1022 struct nfs_delegation *delegation;
1023
1024 rcu_read_lock();
1025 delegation = rcu_dereference(NFS_I(inode)->delegation);
1026 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1027 rcu_read_unlock();
1028 return;
1029 }
1030 rcu_read_unlock();
1031 nfs_inode_return_delegation(inode);
1032}
1033
1034static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1035{
1036 struct nfs4_state *state = opendata->state;
1037 struct nfs_inode *nfsi = NFS_I(state->inode);
1038 struct nfs_delegation *delegation;
1039 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1040 fmode_t fmode = opendata->o_arg.fmode;
1041 nfs4_stateid stateid;
1042 int ret = -EAGAIN;
1043
1044 for (;;) {
1045 if (can_open_cached(state, fmode, open_mode)) {
1046 spin_lock(&state->owner->so_lock);
1047 if (can_open_cached(state, fmode, open_mode)) {
1048 update_open_stateflags(state, fmode);
1049 spin_unlock(&state->owner->so_lock);
1050 goto out_return_state;
1051 }
1052 spin_unlock(&state->owner->so_lock);
1053 }
1054 rcu_read_lock();
1055 delegation = rcu_dereference(nfsi->delegation);
1056 if (!can_open_delegated(delegation, fmode)) {
1057 rcu_read_unlock();
1058 break;
1059 }
1060 /* Save the delegation */
1061 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1062 rcu_read_unlock();
1063 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1064 if (ret != 0)
1065 goto out;
1066 ret = -EAGAIN;
1067
1068 /* Try to update the stateid using the delegation */
1069 if (update_open_stateid(state, NULL, &stateid, fmode))
1070 goto out_return_state;
1071 }
1072out:
1073 return ERR_PTR(ret);
1074out_return_state:
1075 atomic_inc(&state->count);
1076 return state;
1077}
1078
1079static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1080{
1081 struct inode *inode;
1082 struct nfs4_state *state = NULL;
1083 struct nfs_delegation *delegation;
1084 int ret;
1085
1086 if (!data->rpc_done) {
1087 state = nfs4_try_open_cached(data);
1088 goto out;
1089 }
1090
1091 ret = -EAGAIN;
1092 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1093 goto err;
1094 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1095 ret = PTR_ERR(inode);
1096 if (IS_ERR(inode))
1097 goto err;
1098 ret = -ENOMEM;
1099 state = nfs4_get_open_state(inode, data->owner);
1100 if (state == NULL)
1101 goto err_put_inode;
1102 if (data->o_res.delegation_type != 0) {
1103 int delegation_flags = 0;
1104
1105 rcu_read_lock();
1106 delegation = rcu_dereference(NFS_I(inode)->delegation);
1107 if (delegation)
1108 delegation_flags = delegation->flags;
1109 rcu_read_unlock();
1110 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1111 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1112 "returning a delegation for "
1113 "OPEN(CLAIM_DELEGATE_CUR)\n",
1114 NFS_CLIENT(inode)->cl_server);
1115 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1116 nfs_inode_set_delegation(state->inode,
1117 data->owner->so_cred,
1118 &data->o_res);
1119 else
1120 nfs_inode_reclaim_delegation(state->inode,
1121 data->owner->so_cred,
1122 &data->o_res);
1123 }
1124
1125 update_open_stateid(state, &data->o_res.stateid, NULL,
1126 data->o_arg.fmode);
1127 iput(inode);
1128out:
1129 return state;
1130err_put_inode:
1131 iput(inode);
1132err:
1133 return ERR_PTR(ret);
1134}
1135
1136static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1137{
1138 struct nfs_inode *nfsi = NFS_I(state->inode);
1139 struct nfs_open_context *ctx;
1140
1141 spin_lock(&state->inode->i_lock);
1142 list_for_each_entry(ctx, &nfsi->open_files, list) {
1143 if (ctx->state != state)
1144 continue;
1145 get_nfs_open_context(ctx);
1146 spin_unlock(&state->inode->i_lock);
1147 return ctx;
1148 }
1149 spin_unlock(&state->inode->i_lock);
1150 return ERR_PTR(-ENOENT);
1151}
1152
1153static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1154{
1155 struct nfs4_opendata *opendata;
1156
1157 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1158 if (opendata == NULL)
1159 return ERR_PTR(-ENOMEM);
1160 opendata->state = state;
1161 atomic_inc(&state->count);
1162 return opendata;
1163}
1164
1165static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1166{
1167 struct nfs4_state *newstate;
1168 int ret;
1169
1170 opendata->o_arg.open_flags = 0;
1171 opendata->o_arg.fmode = fmode;
1172 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1173 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1174 nfs4_init_opendata_res(opendata);
1175 ret = _nfs4_recover_proc_open(opendata);
1176 if (ret != 0)
1177 return ret;
1178 newstate = nfs4_opendata_to_nfs4_state(opendata);
1179 if (IS_ERR(newstate))
1180 return PTR_ERR(newstate);
1181 nfs4_close_state(newstate, fmode);
1182 *res = newstate;
1183 return 0;
1184}
1185
1186static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1187{
1188 struct nfs4_state *newstate;
1189 int ret;
1190
1191 /* memory barrier prior to reading state->n_* */
1192 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1193 smp_rmb();
1194 if (state->n_rdwr != 0) {
1195 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1196 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1197 if (ret != 0)
1198 return ret;
1199 if (newstate != state)
1200 return -ESTALE;
1201 }
1202 if (state->n_wronly != 0) {
1203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1204 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1205 if (ret != 0)
1206 return ret;
1207 if (newstate != state)
1208 return -ESTALE;
1209 }
1210 if (state->n_rdonly != 0) {
1211 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1213 if (ret != 0)
1214 return ret;
1215 if (newstate != state)
1216 return -ESTALE;
1217 }
1218 /*
1219 * We may have performed cached opens for all three recoveries.
1220 * Check if we need to update the current stateid.
1221 */
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1223 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1224 write_seqlock(&state->seqlock);
1225 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1226 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1227 write_sequnlock(&state->seqlock);
1228 }
1229 return 0;
1230}
1231
1232/*
1233 * OPEN_RECLAIM:
1234 * reclaim state on the server after a reboot.
1235 */
1236static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1237{
1238 struct nfs_delegation *delegation;
1239 struct nfs4_opendata *opendata;
1240 fmode_t delegation_type = 0;
1241 int status;
1242
1243 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1244 if (IS_ERR(opendata))
1245 return PTR_ERR(opendata);
1246 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1247 opendata->o_arg.fh = NFS_FH(state->inode);
1248 rcu_read_lock();
1249 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1250 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1251 delegation_type = delegation->type;
1252 rcu_read_unlock();
1253 opendata->o_arg.u.delegation_type = delegation_type;
1254 status = nfs4_open_recover(opendata, state);
1255 nfs4_opendata_put(opendata);
1256 return status;
1257}
1258
1259static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1260{
1261 struct nfs_server *server = NFS_SERVER(state->inode);
1262 struct nfs4_exception exception = { };
1263 int err;
1264 do {
1265 err = _nfs4_do_open_reclaim(ctx, state);
1266 if (err != -NFS4ERR_DELAY)
1267 break;
1268 nfs4_handle_exception(server, err, &exception);
1269 } while (exception.retry);
1270 return err;
1271}
1272
1273static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1274{
1275 struct nfs_open_context *ctx;
1276 int ret;
1277
1278 ctx = nfs4_state_find_open_context(state);
1279 if (IS_ERR(ctx))
1280 return PTR_ERR(ctx);
1281 ret = nfs4_do_open_reclaim(ctx, state);
1282 put_nfs_open_context(ctx);
1283 return ret;
1284}
1285
1286static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1287{
1288 struct nfs4_opendata *opendata;
1289 int ret;
1290
1291 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1292 if (IS_ERR(opendata))
1293 return PTR_ERR(opendata);
1294 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1295 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1296 sizeof(opendata->o_arg.u.delegation.data));
1297 ret = nfs4_open_recover(opendata, state);
1298 nfs4_opendata_put(opendata);
1299 return ret;
1300}
1301
1302int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303{
1304 struct nfs4_exception exception = { };
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1306 int err;
1307 do {
1308 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1309 switch (err) {
1310 case 0:
1311 case -ENOENT:
1312 case -ESTALE:
1313 goto out;
1314 case -NFS4ERR_BADSESSION:
1315 case -NFS4ERR_BADSLOT:
1316 case -NFS4ERR_BAD_HIGH_SLOT:
1317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1318 case -NFS4ERR_DEADSESSION:
1319 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1320 goto out;
1321 case -NFS4ERR_STALE_CLIENTID:
1322 case -NFS4ERR_STALE_STATEID:
1323 case -NFS4ERR_EXPIRED:
1324 /* Don't recall a delegation if it was lost */
1325 nfs4_schedule_lease_recovery(server->nfs_client);
1326 goto out;
1327 case -ERESTARTSYS:
1328 /*
1329 * The show must go on: exit, but mark the
1330 * stateid as needing recovery.
1331 */
1332 case -NFS4ERR_ADMIN_REVOKED:
1333 case -NFS4ERR_BAD_STATEID:
1334 nfs4_schedule_stateid_recovery(server, state);
1335 case -EKEYEXPIRED:
1336 /*
1337 * User RPCSEC_GSS context has expired.
1338 * We cannot recover this stateid now, so
1339 * skip it and allow recovery thread to
1340 * proceed.
1341 */
1342 case -ENOMEM:
1343 err = 0;
1344 goto out;
1345 }
1346 err = nfs4_handle_exception(server, err, &exception);
1347 } while (exception.retry);
1348out:
1349 return err;
1350}
1351
1352static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1353{
1354 struct nfs4_opendata *data = calldata;
1355
1356 data->rpc_status = task->tk_status;
1357 if (data->rpc_status == 0) {
1358 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1359 sizeof(data->o_res.stateid.data));
1360 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1361 renew_lease(data->o_res.server, data->timestamp);
1362 data->rpc_done = 1;
1363 }
1364}
1365
1366static void nfs4_open_confirm_release(void *calldata)
1367{
1368 struct nfs4_opendata *data = calldata;
1369 struct nfs4_state *state = NULL;
1370
1371 /* If this request hasn't been cancelled, do nothing */
1372 if (data->cancelled == 0)
1373 goto out_free;
1374 /* In case of error, no cleanup! */
1375 if (!data->rpc_done)
1376 goto out_free;
1377 state = nfs4_opendata_to_nfs4_state(data);
1378 if (!IS_ERR(state))
1379 nfs4_close_state(state, data->o_arg.fmode);
1380out_free:
1381 nfs4_opendata_put(data);
1382}
1383
1384static const struct rpc_call_ops nfs4_open_confirm_ops = {
1385 .rpc_call_done = nfs4_open_confirm_done,
1386 .rpc_release = nfs4_open_confirm_release,
1387};
1388
1389/*
1390 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1391 */
1392static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1393{
1394 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1395 struct rpc_task *task;
1396 struct rpc_message msg = {
1397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1398 .rpc_argp = &data->c_arg,
1399 .rpc_resp = &data->c_res,
1400 .rpc_cred = data->owner->so_cred,
1401 };
1402 struct rpc_task_setup task_setup_data = {
1403 .rpc_client = server->client,
1404 .rpc_message = &msg,
1405 .callback_ops = &nfs4_open_confirm_ops,
1406 .callback_data = data,
1407 .workqueue = nfsiod_workqueue,
1408 .flags = RPC_TASK_ASYNC,
1409 };
1410 int status;
1411
1412 kref_get(&data->kref);
1413 data->rpc_done = 0;
1414 data->rpc_status = 0;
1415 data->timestamp = jiffies;
1416 task = rpc_run_task(&task_setup_data);
1417 if (IS_ERR(task))
1418 return PTR_ERR(task);
1419 status = nfs4_wait_for_completion_rpc_task(task);
1420 if (status != 0) {
1421 data->cancelled = 1;
1422 smp_wmb();
1423 } else
1424 status = data->rpc_status;
1425 rpc_put_task(task);
1426 return status;
1427}
1428
1429static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1430{
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state_owner *sp = data->owner;
1433
1434 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1435 return;
1436 /*
1437 * Check if we still need to send an OPEN call, or if we can use
1438 * a delegation instead.
1439 */
1440 if (data->state != NULL) {
1441 struct nfs_delegation *delegation;
1442
1443 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1444 goto out_no_action;
1445 rcu_read_lock();
1446 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1447 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1448 can_open_delegated(delegation, data->o_arg.fmode))
1449 goto unlock_no_action;
1450 rcu_read_unlock();
1451 }
1452 /* Update sequence id. */
1453 data->o_arg.id = sp->so_seqid.owner_id;
1454 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1455 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1456 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1457 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1458 }
1459 data->timestamp = jiffies;
1460 if (nfs4_setup_sequence(data->o_arg.server,
1461 &data->o_arg.seq_args,
1462 &data->o_res.seq_res, task))
1463 return;
1464 rpc_call_start(task);
1465 return;
1466unlock_no_action:
1467 rcu_read_unlock();
1468out_no_action:
1469 task->tk_action = NULL;
1470
1471}
1472
1473static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1474{
1475 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1476 nfs4_open_prepare(task, calldata);
1477}
1478
1479static void nfs4_open_done(struct rpc_task *task, void *calldata)
1480{
1481 struct nfs4_opendata *data = calldata;
1482
1483 data->rpc_status = task->tk_status;
1484
1485 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1486 return;
1487
1488 if (task->tk_status == 0) {
1489 switch (data->o_res.f_attr->mode & S_IFMT) {
1490 case S_IFREG:
1491 break;
1492 case S_IFLNK:
1493 data->rpc_status = -ELOOP;
1494 break;
1495 case S_IFDIR:
1496 data->rpc_status = -EISDIR;
1497 break;
1498 default:
1499 data->rpc_status = -ENOTDIR;
1500 }
1501 renew_lease(data->o_res.server, data->timestamp);
1502 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1503 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1504 }
1505 data->rpc_done = 1;
1506}
1507
1508static void nfs4_open_release(void *calldata)
1509{
1510 struct nfs4_opendata *data = calldata;
1511 struct nfs4_state *state = NULL;
1512
1513 /* If this request hasn't been cancelled, do nothing */
1514 if (data->cancelled == 0)
1515 goto out_free;
1516 /* In case of error, no cleanup! */
1517 if (data->rpc_status != 0 || !data->rpc_done)
1518 goto out_free;
1519 /* In case we need an open_confirm, no cleanup! */
1520 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1521 goto out_free;
1522 state = nfs4_opendata_to_nfs4_state(data);
1523 if (!IS_ERR(state))
1524 nfs4_close_state(state, data->o_arg.fmode);
1525out_free:
1526 nfs4_opendata_put(data);
1527}
1528
1529static const struct rpc_call_ops nfs4_open_ops = {
1530 .rpc_call_prepare = nfs4_open_prepare,
1531 .rpc_call_done = nfs4_open_done,
1532 .rpc_release = nfs4_open_release,
1533};
1534
1535static const struct rpc_call_ops nfs4_recover_open_ops = {
1536 .rpc_call_prepare = nfs4_recover_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1539};
1540
1541static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1542{
1543 struct inode *dir = data->dir->d_inode;
1544 struct nfs_server *server = NFS_SERVER(dir);
1545 struct nfs_openargs *o_arg = &data->o_arg;
1546 struct nfs_openres *o_res = &data->o_res;
1547 struct rpc_task *task;
1548 struct rpc_message msg = {
1549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1550 .rpc_argp = o_arg,
1551 .rpc_resp = o_res,
1552 .rpc_cred = data->owner->so_cred,
1553 };
1554 struct rpc_task_setup task_setup_data = {
1555 .rpc_client = server->client,
1556 .rpc_message = &msg,
1557 .callback_ops = &nfs4_open_ops,
1558 .callback_data = data,
1559 .workqueue = nfsiod_workqueue,
1560 .flags = RPC_TASK_ASYNC,
1561 };
1562 int status;
1563
1564 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1565 kref_get(&data->kref);
1566 data->rpc_done = 0;
1567 data->rpc_status = 0;
1568 data->cancelled = 0;
1569 if (isrecover)
1570 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1571 task = rpc_run_task(&task_setup_data);
1572 if (IS_ERR(task))
1573 return PTR_ERR(task);
1574 status = nfs4_wait_for_completion_rpc_task(task);
1575 if (status != 0) {
1576 data->cancelled = 1;
1577 smp_wmb();
1578 } else
1579 status = data->rpc_status;
1580 rpc_put_task(task);
1581
1582 return status;
1583}
1584
1585static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1586{
1587 struct inode *dir = data->dir->d_inode;
1588 struct nfs_openres *o_res = &data->o_res;
1589 int status;
1590
1591 status = nfs4_run_open_task(data, 1);
1592 if (status != 0 || !data->rpc_done)
1593 return status;
1594
1595 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1596
1597 nfs_refresh_inode(dir, o_res->dir_attr);
1598
1599 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1600 status = _nfs4_proc_open_confirm(data);
1601 if (status != 0)
1602 return status;
1603 }
1604
1605 return status;
1606}
1607
1608/*
1609 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1610 */
1611static int _nfs4_proc_open(struct nfs4_opendata *data)
1612{
1613 struct inode *dir = data->dir->d_inode;
1614 struct nfs_server *server = NFS_SERVER(dir);
1615 struct nfs_openargs *o_arg = &data->o_arg;
1616 struct nfs_openres *o_res = &data->o_res;
1617 int status;
1618
1619 status = nfs4_run_open_task(data, 0);
1620 if (!data->rpc_done)
1621 return status;
1622 if (status != 0) {
1623 if (status == -NFS4ERR_BADNAME &&
1624 !(o_arg->open_flags & O_CREAT))
1625 return -ENOENT;
1626 return status;
1627 }
1628
1629 nfs_fattr_map_and_free_names(server, &data->f_attr);
1630
1631 if (o_arg->open_flags & O_CREAT) {
1632 update_changeattr(dir, &o_res->cinfo);
1633 nfs_post_op_update_inode(dir, o_res->dir_attr);
1634 } else
1635 nfs_refresh_inode(dir, o_res->dir_attr);
1636 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1637 server->caps &= ~NFS_CAP_POSIX_LOCK;
1638 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1639 status = _nfs4_proc_open_confirm(data);
1640 if (status != 0)
1641 return status;
1642 }
1643 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1644 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1645 return 0;
1646}
1647
1648static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1649{
1650 unsigned int loop;
1651 int ret;
1652
1653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1654 ret = nfs4_wait_clnt_recover(clp);
1655 if (ret != 0)
1656 break;
1657 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1658 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1659 break;
1660 nfs4_schedule_state_manager(clp);
1661 ret = -EIO;
1662 }
1663 return ret;
1664}
1665
1666static int nfs4_recover_expired_lease(struct nfs_server *server)
1667{
1668 return nfs4_client_recover_expired_lease(server->nfs_client);
1669}
1670
1671/*
1672 * OPEN_EXPIRED:
1673 * reclaim state on the server after a network partition.
1674 * Assumes caller holds the appropriate lock
1675 */
1676static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1677{
1678 struct nfs4_opendata *opendata;
1679 int ret;
1680
1681 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1682 if (IS_ERR(opendata))
1683 return PTR_ERR(opendata);
1684 ret = nfs4_open_recover(opendata, state);
1685 if (ret == -ESTALE)
1686 d_drop(ctx->dentry);
1687 nfs4_opendata_put(opendata);
1688 return ret;
1689}
1690
1691static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1692{
1693 struct nfs_server *server = NFS_SERVER(state->inode);
1694 struct nfs4_exception exception = { };
1695 int err;
1696
1697 do {
1698 err = _nfs4_open_expired(ctx, state);
1699 switch (err) {
1700 default:
1701 goto out;
1702 case -NFS4ERR_GRACE:
1703 case -NFS4ERR_DELAY:
1704 nfs4_handle_exception(server, err, &exception);
1705 err = 0;
1706 }
1707 } while (exception.retry);
1708out:
1709 return err;
1710}
1711
1712static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1713{
1714 struct nfs_open_context *ctx;
1715 int ret;
1716
1717 ctx = nfs4_state_find_open_context(state);
1718 if (IS_ERR(ctx))
1719 return PTR_ERR(ctx);
1720 ret = nfs4_do_open_expired(ctx, state);
1721 put_nfs_open_context(ctx);
1722 return ret;
1723}
1724
1725#if defined(CONFIG_NFS_V4_1)
1726static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1727{
1728 int status = NFS_OK;
1729 struct nfs_server *server = NFS_SERVER(state->inode);
1730
1731 if (state->flags & flags) {
1732 status = nfs41_test_stateid(server, stateid);
1733 if (status != NFS_OK) {
1734 nfs41_free_stateid(server, stateid);
1735 state->flags &= ~flags;
1736 }
1737 }
1738 return status;
1739}
1740
1741static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1742{
1743 int deleg_status, open_status;
1744 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1745 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1746
1747 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1748 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1749
1750 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1751 return NFS_OK;
1752 return nfs4_open_expired(sp, state);
1753}
1754#endif
1755
1756/*
1757 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1758 * fields corresponding to attributes that were used to store the verifier.
1759 * Make sure we clobber those fields in the later setattr call
1760 */
1761static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1762{
1763 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1764 !(sattr->ia_valid & ATTR_ATIME_SET))
1765 sattr->ia_valid |= ATTR_ATIME;
1766
1767 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1768 !(sattr->ia_valid & ATTR_MTIME_SET))
1769 sattr->ia_valid |= ATTR_MTIME;
1770}
1771
1772/*
1773 * Returns a referenced nfs4_state
1774 */
1775static 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)
1776{
1777 struct nfs4_state_owner *sp;
1778 struct nfs4_state *state = NULL;
1779 struct nfs_server *server = NFS_SERVER(dir);
1780 struct nfs4_opendata *opendata;
1781 int status;
1782
1783 /* Protect against reboot recovery conflicts */
1784 status = -ENOMEM;
1785 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1786 if (sp == NULL) {
1787 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1788 goto out_err;
1789 }
1790 status = nfs4_recover_expired_lease(server);
1791 if (status != 0)
1792 goto err_put_state_owner;
1793 if (dentry->d_inode != NULL)
1794 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1795 status = -ENOMEM;
1796 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1797 if (opendata == NULL)
1798 goto err_put_state_owner;
1799
1800 if (dentry->d_inode != NULL)
1801 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1802
1803 status = _nfs4_proc_open(opendata);
1804 if (status != 0)
1805 goto err_opendata_put;
1806
1807 state = nfs4_opendata_to_nfs4_state(opendata);
1808 status = PTR_ERR(state);
1809 if (IS_ERR(state))
1810 goto err_opendata_put;
1811 if (server->caps & NFS_CAP_POSIX_LOCK)
1812 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1813
1814 if (opendata->o_arg.open_flags & O_EXCL) {
1815 nfs4_exclusive_attrset(opendata, sattr);
1816
1817 nfs_fattr_init(opendata->o_res.f_attr);
1818 status = nfs4_do_setattr(state->inode, cred,
1819 opendata->o_res.f_attr, sattr,
1820 state);
1821 if (status == 0)
1822 nfs_setattr_update_inode(state->inode, sattr);
1823 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1824 }
1825 nfs4_opendata_put(opendata);
1826 nfs4_put_state_owner(sp);
1827 *res = state;
1828 return 0;
1829err_opendata_put:
1830 nfs4_opendata_put(opendata);
1831err_put_state_owner:
1832 nfs4_put_state_owner(sp);
1833out_err:
1834 *res = NULL;
1835 return status;
1836}
1837
1838
1839static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1840{
1841 struct nfs4_exception exception = { };
1842 struct nfs4_state *res;
1843 int status;
1844
1845 do {
1846 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1847 if (status == 0)
1848 break;
1849 /* NOTE: BAD_SEQID means the server and client disagree about the
1850 * book-keeping w.r.t. state-changing operations
1851 * (OPEN/CLOSE/LOCK/LOCKU...)
1852 * It is actually a sign of a bug on the client or on the server.
1853 *
1854 * If we receive a BAD_SEQID error in the particular case of
1855 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1856 * have unhashed the old state_owner for us, and that we can
1857 * therefore safely retry using a new one. We should still warn
1858 * the user though...
1859 */
1860 if (status == -NFS4ERR_BAD_SEQID) {
1861 printk(KERN_WARNING "NFS: v4 server %s "
1862 " returned a bad sequence-id error!\n",
1863 NFS_SERVER(dir)->nfs_client->cl_hostname);
1864 exception.retry = 1;
1865 continue;
1866 }
1867 /*
1868 * BAD_STATEID on OPEN means that the server cancelled our
1869 * state before it received the OPEN_CONFIRM.
1870 * Recover by retrying the request as per the discussion
1871 * on Page 181 of RFC3530.
1872 */
1873 if (status == -NFS4ERR_BAD_STATEID) {
1874 exception.retry = 1;
1875 continue;
1876 }
1877 if (status == -EAGAIN) {
1878 /* We must have found a delegation */
1879 exception.retry = 1;
1880 continue;
1881 }
1882 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1883 status, &exception));
1884 } while (exception.retry);
1885 return res;
1886}
1887
1888static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1889 struct nfs_fattr *fattr, struct iattr *sattr,
1890 struct nfs4_state *state)
1891{
1892 struct nfs_server *server = NFS_SERVER(inode);
1893 struct nfs_setattrargs arg = {
1894 .fh = NFS_FH(inode),
1895 .iap = sattr,
1896 .server = server,
1897 .bitmask = server->attr_bitmask,
1898 };
1899 struct nfs_setattrres res = {
1900 .fattr = fattr,
1901 .server = server,
1902 };
1903 struct rpc_message msg = {
1904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1905 .rpc_argp = &arg,
1906 .rpc_resp = &res,
1907 .rpc_cred = cred,
1908 };
1909 unsigned long timestamp = jiffies;
1910 int status;
1911
1912 nfs_fattr_init(fattr);
1913
1914 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1915 /* Use that stateid */
1916 } else if (state != NULL) {
1917 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1918 } else
1919 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1920
1921 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1922 if (status == 0 && state != NULL)
1923 renew_lease(server, timestamp);
1924 return status;
1925}
1926
1927static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1928 struct nfs_fattr *fattr, struct iattr *sattr,
1929 struct nfs4_state *state)
1930{
1931 struct nfs_server *server = NFS_SERVER(inode);
1932 struct nfs4_exception exception = { };
1933 int err;
1934 do {
1935 err = nfs4_handle_exception(server,
1936 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1937 &exception);
1938 } while (exception.retry);
1939 return err;
1940}
1941
1942struct nfs4_closedata {
1943 struct inode *inode;
1944 struct nfs4_state *state;
1945 struct nfs_closeargs arg;
1946 struct nfs_closeres res;
1947 struct nfs_fattr fattr;
1948 unsigned long timestamp;
1949 bool roc;
1950 u32 roc_barrier;
1951};
1952
1953static void nfs4_free_closedata(void *data)
1954{
1955 struct nfs4_closedata *calldata = data;
1956 struct nfs4_state_owner *sp = calldata->state->owner;
1957 struct super_block *sb = calldata->state->inode->i_sb;
1958
1959 if (calldata->roc)
1960 pnfs_roc_release(calldata->state->inode);
1961 nfs4_put_open_state(calldata->state);
1962 nfs_free_seqid(calldata->arg.seqid);
1963 nfs4_put_state_owner(sp);
1964 nfs_sb_deactive(sb);
1965 kfree(calldata);
1966}
1967
1968static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1969 fmode_t fmode)
1970{
1971 spin_lock(&state->owner->so_lock);
1972 if (!(fmode & FMODE_READ))
1973 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1974 if (!(fmode & FMODE_WRITE))
1975 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1976 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1977 spin_unlock(&state->owner->so_lock);
1978}
1979
1980static void nfs4_close_done(struct rpc_task *task, void *data)
1981{
1982 struct nfs4_closedata *calldata = data;
1983 struct nfs4_state *state = calldata->state;
1984 struct nfs_server *server = NFS_SERVER(calldata->inode);
1985
1986 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1987 return;
1988 /* hmm. we are done with the inode, and in the process of freeing
1989 * the state_owner. we keep this around to process errors
1990 */
1991 switch (task->tk_status) {
1992 case 0:
1993 if (calldata->roc)
1994 pnfs_roc_set_barrier(state->inode,
1995 calldata->roc_barrier);
1996 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1997 renew_lease(server, calldata->timestamp);
1998 nfs4_close_clear_stateid_flags(state,
1999 calldata->arg.fmode);
2000 break;
2001 case -NFS4ERR_STALE_STATEID:
2002 case -NFS4ERR_OLD_STATEID:
2003 case -NFS4ERR_BAD_STATEID:
2004 case -NFS4ERR_EXPIRED:
2005 if (calldata->arg.fmode == 0)
2006 break;
2007 default:
2008 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2009 rpc_restart_call_prepare(task);
2010 }
2011 nfs_release_seqid(calldata->arg.seqid);
2012 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2013}
2014
2015static void nfs4_close_prepare(struct rpc_task *task, void *data)
2016{
2017 struct nfs4_closedata *calldata = data;
2018 struct nfs4_state *state = calldata->state;
2019 int call_close = 0;
2020
2021 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2022 return;
2023
2024 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2025 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2026 spin_lock(&state->owner->so_lock);
2027 /* Calculate the change in open mode */
2028 if (state->n_rdwr == 0) {
2029 if (state->n_rdonly == 0) {
2030 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2031 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2032 calldata->arg.fmode &= ~FMODE_READ;
2033 }
2034 if (state->n_wronly == 0) {
2035 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2036 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2037 calldata->arg.fmode &= ~FMODE_WRITE;
2038 }
2039 }
2040 spin_unlock(&state->owner->so_lock);
2041
2042 if (!call_close) {
2043 /* Note: exit _without_ calling nfs4_close_done */
2044 task->tk_action = NULL;
2045 return;
2046 }
2047
2048 if (calldata->arg.fmode == 0) {
2049 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2050 if (calldata->roc &&
2051 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2052 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2053 task, NULL);
2054 return;
2055 }
2056 }
2057
2058 nfs_fattr_init(calldata->res.fattr);
2059 calldata->timestamp = jiffies;
2060 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2061 &calldata->arg.seq_args,
2062 &calldata->res.seq_res,
2063 task))
2064 return;
2065 rpc_call_start(task);
2066}
2067
2068static const struct rpc_call_ops nfs4_close_ops = {
2069 .rpc_call_prepare = nfs4_close_prepare,
2070 .rpc_call_done = nfs4_close_done,
2071 .rpc_release = nfs4_free_closedata,
2072};
2073
2074/*
2075 * It is possible for data to be read/written from a mem-mapped file
2076 * after the sys_close call (which hits the vfs layer as a flush).
2077 * This means that we can't safely call nfsv4 close on a file until
2078 * the inode is cleared. This in turn means that we are not good
2079 * NFSv4 citizens - we do not indicate to the server to update the file's
2080 * share state even when we are done with one of the three share
2081 * stateid's in the inode.
2082 *
2083 * NOTE: Caller must be holding the sp->so_owner semaphore!
2084 */
2085int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2086{
2087 struct nfs_server *server = NFS_SERVER(state->inode);
2088 struct nfs4_closedata *calldata;
2089 struct nfs4_state_owner *sp = state->owner;
2090 struct rpc_task *task;
2091 struct rpc_message msg = {
2092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2093 .rpc_cred = state->owner->so_cred,
2094 };
2095 struct rpc_task_setup task_setup_data = {
2096 .rpc_client = server->client,
2097 .rpc_message = &msg,
2098 .callback_ops = &nfs4_close_ops,
2099 .workqueue = nfsiod_workqueue,
2100 .flags = RPC_TASK_ASYNC,
2101 };
2102 int status = -ENOMEM;
2103
2104 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2105 if (calldata == NULL)
2106 goto out;
2107 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2108 calldata->inode = state->inode;
2109 calldata->state = state;
2110 calldata->arg.fh = NFS_FH(state->inode);
2111 calldata->arg.stateid = &state->open_stateid;
2112 /* Serialization for the sequence id */
2113 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2114 if (calldata->arg.seqid == NULL)
2115 goto out_free_calldata;
2116 calldata->arg.fmode = 0;
2117 calldata->arg.bitmask = server->cache_consistency_bitmask;
2118 calldata->res.fattr = &calldata->fattr;
2119 calldata->res.seqid = calldata->arg.seqid;
2120 calldata->res.server = server;
2121 calldata->roc = roc;
2122 nfs_sb_active(calldata->inode->i_sb);
2123
2124 msg.rpc_argp = &calldata->arg;
2125 msg.rpc_resp = &calldata->res;
2126 task_setup_data.callback_data = calldata;
2127 task = rpc_run_task(&task_setup_data);
2128 if (IS_ERR(task))
2129 return PTR_ERR(task);
2130 status = 0;
2131 if (wait)
2132 status = rpc_wait_for_completion_task(task);
2133 rpc_put_task(task);
2134 return status;
2135out_free_calldata:
2136 kfree(calldata);
2137out:
2138 if (roc)
2139 pnfs_roc_release(state->inode);
2140 nfs4_put_open_state(state);
2141 nfs4_put_state_owner(sp);
2142 return status;
2143}
2144
2145static struct inode *
2146nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2147{
2148 struct nfs4_state *state;
2149
2150 /* Protect against concurrent sillydeletes */
2151 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2152 if (IS_ERR(state))
2153 return ERR_CAST(state);
2154 ctx->state = state;
2155 return igrab(state->inode);
2156}
2157
2158static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2159{
2160 if (ctx->state == NULL)
2161 return;
2162 if (is_sync)
2163 nfs4_close_sync(ctx->state, ctx->mode);
2164 else
2165 nfs4_close_state(ctx->state, ctx->mode);
2166}
2167
2168static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2169{
2170 struct nfs4_server_caps_arg args = {
2171 .fhandle = fhandle,
2172 };
2173 struct nfs4_server_caps_res res = {};
2174 struct rpc_message msg = {
2175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2176 .rpc_argp = &args,
2177 .rpc_resp = &res,
2178 };
2179 int status;
2180
2181 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2182 if (status == 0) {
2183 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2184 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2185 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2186 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2187 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2188 NFS_CAP_CTIME|NFS_CAP_MTIME);
2189 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2190 server->caps |= NFS_CAP_ACLS;
2191 if (res.has_links != 0)
2192 server->caps |= NFS_CAP_HARDLINKS;
2193 if (res.has_symlinks != 0)
2194 server->caps |= NFS_CAP_SYMLINKS;
2195 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2196 server->caps |= NFS_CAP_FILEID;
2197 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2198 server->caps |= NFS_CAP_MODE;
2199 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2200 server->caps |= NFS_CAP_NLINK;
2201 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2202 server->caps |= NFS_CAP_OWNER;
2203 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2204 server->caps |= NFS_CAP_OWNER_GROUP;
2205 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2206 server->caps |= NFS_CAP_ATIME;
2207 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2208 server->caps |= NFS_CAP_CTIME;
2209 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2210 server->caps |= NFS_CAP_MTIME;
2211
2212 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2213 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2214 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2215 server->acl_bitmask = res.acl_bitmask;
2216 }
2217
2218 return status;
2219}
2220
2221int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2222{
2223 struct nfs4_exception exception = { };
2224 int err;
2225 do {
2226 err = nfs4_handle_exception(server,
2227 _nfs4_server_capabilities(server, fhandle),
2228 &exception);
2229 } while (exception.retry);
2230 return err;
2231}
2232
2233static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2234 struct nfs_fsinfo *info)
2235{
2236 struct nfs4_lookup_root_arg args = {
2237 .bitmask = nfs4_fattr_bitmap,
2238 };
2239 struct nfs4_lookup_res res = {
2240 .server = server,
2241 .fattr = info->fattr,
2242 .fh = fhandle,
2243 };
2244 struct rpc_message msg = {
2245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2246 .rpc_argp = &args,
2247 .rpc_resp = &res,
2248 };
2249
2250 nfs_fattr_init(info->fattr);
2251 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2252}
2253
2254static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2255 struct nfs_fsinfo *info)
2256{
2257 struct nfs4_exception exception = { };
2258 int err;
2259 do {
2260 err = _nfs4_lookup_root(server, fhandle, info);
2261 switch (err) {
2262 case 0:
2263 case -NFS4ERR_WRONGSEC:
2264 break;
2265 default:
2266 err = nfs4_handle_exception(server, err, &exception);
2267 }
2268 } while (exception.retry);
2269 return err;
2270}
2271
2272static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2273 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2274{
2275 struct rpc_auth *auth;
2276 int ret;
2277
2278 auth = rpcauth_create(flavor, server->client);
2279 if (!auth) {
2280 ret = -EIO;
2281 goto out;
2282 }
2283 ret = nfs4_lookup_root(server, fhandle, info);
2284out:
2285 return ret;
2286}
2287
2288static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2289 struct nfs_fsinfo *info)
2290{
2291 int i, len, status = 0;
2292 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2293
2294 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2295 flav_array[len] = RPC_AUTH_NULL;
2296 len += 1;
2297
2298 for (i = 0; i < len; i++) {
2299 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2300 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2301 continue;
2302 break;
2303 }
2304 /*
2305 * -EACCESS could mean that the user doesn't have correct permissions
2306 * to access the mount. It could also mean that we tried to mount
2307 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2308 * existing mount programs don't handle -EACCES very well so it should
2309 * be mapped to -EPERM instead.
2310 */
2311 if (status == -EACCES)
2312 status = -EPERM;
2313 return status;
2314}
2315
2316/*
2317 * get the file handle for the "/" directory on the server
2318 */
2319static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_fsinfo *info)
2321{
2322 int minor_version = server->nfs_client->cl_minorversion;
2323 int status = nfs4_lookup_root(server, fhandle, info);
2324 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2325 /*
2326 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2327 * by nfs4_map_errors() as this function exits.
2328 */
2329 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2330 if (status == 0)
2331 status = nfs4_server_capabilities(server, fhandle);
2332 if (status == 0)
2333 status = nfs4_do_fsinfo(server, fhandle, info);
2334 return nfs4_map_errors(status);
2335}
2336
2337static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2338/*
2339 * Get locations and (maybe) other attributes of a referral.
2340 * Note that we'll actually follow the referral later when
2341 * we detect fsid mismatch in inode revalidation
2342 */
2343static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2344 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2345{
2346 int status = -ENOMEM;
2347 struct page *page = NULL;
2348 struct nfs4_fs_locations *locations = NULL;
2349
2350 page = alloc_page(GFP_KERNEL);
2351 if (page == NULL)
2352 goto out;
2353 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2354 if (locations == NULL)
2355 goto out;
2356
2357 status = nfs4_proc_fs_locations(dir, name, locations, page);
2358 if (status != 0)
2359 goto out;
2360 /* Make sure server returned a different fsid for the referral */
2361 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2362 dprintk("%s: server did not return a different fsid for"
2363 " a referral at %s\n", __func__, name->name);
2364 status = -EIO;
2365 goto out;
2366 }
2367 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2368 nfs_fixup_referral_attributes(&locations->fattr);
2369
2370 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2371 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2372 memset(fhandle, 0, sizeof(struct nfs_fh));
2373out:
2374 if (page)
2375 __free_page(page);
2376 kfree(locations);
2377 return status;
2378}
2379
2380static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2381{
2382 struct nfs4_getattr_arg args = {
2383 .fh = fhandle,
2384 .bitmask = server->attr_bitmask,
2385 };
2386 struct nfs4_getattr_res res = {
2387 .fattr = fattr,
2388 .server = server,
2389 };
2390 struct rpc_message msg = {
2391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2392 .rpc_argp = &args,
2393 .rpc_resp = &res,
2394 };
2395
2396 nfs_fattr_init(fattr);
2397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2398}
2399
2400static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2401{
2402 struct nfs4_exception exception = { };
2403 int err;
2404 do {
2405 err = nfs4_handle_exception(server,
2406 _nfs4_proc_getattr(server, fhandle, fattr),
2407 &exception);
2408 } while (exception.retry);
2409 return err;
2410}
2411
2412/*
2413 * The file is not closed if it is opened due to the a request to change
2414 * the size of the file. The open call will not be needed once the
2415 * VFS layer lookup-intents are implemented.
2416 *
2417 * Close is called when the inode is destroyed.
2418 * If we haven't opened the file for O_WRONLY, we
2419 * need to in the size_change case to obtain a stateid.
2420 *
2421 * Got race?
2422 * Because OPEN is always done by name in nfsv4, it is
2423 * possible that we opened a different file by the same
2424 * name. We can recognize this race condition, but we
2425 * can't do anything about it besides returning an error.
2426 *
2427 * This will be fixed with VFS changes (lookup-intent).
2428 */
2429static int
2430nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2431 struct iattr *sattr)
2432{
2433 struct inode *inode = dentry->d_inode;
2434 struct rpc_cred *cred = NULL;
2435 struct nfs4_state *state = NULL;
2436 int status;
2437
2438 if (pnfs_ld_layoutret_on_setattr(inode))
2439 pnfs_return_layout(inode);
2440
2441 nfs_fattr_init(fattr);
2442
2443 /* Search for an existing open(O_WRITE) file */
2444 if (sattr->ia_valid & ATTR_FILE) {
2445 struct nfs_open_context *ctx;
2446
2447 ctx = nfs_file_open_context(sattr->ia_file);
2448 if (ctx) {
2449 cred = ctx->cred;
2450 state = ctx->state;
2451 }
2452 }
2453
2454 /* Deal with open(O_TRUNC) */
2455 if (sattr->ia_valid & ATTR_OPEN)
2456 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2457
2458 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2459 if (status == 0)
2460 nfs_setattr_update_inode(inode, sattr);
2461 return status;
2462}
2463
2464static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2465 const struct qstr *name, struct nfs_fh *fhandle,
2466 struct nfs_fattr *fattr)
2467{
2468 struct nfs_server *server = NFS_SERVER(dir);
2469 int status;
2470 struct nfs4_lookup_arg args = {
2471 .bitmask = server->attr_bitmask,
2472 .dir_fh = NFS_FH(dir),
2473 .name = name,
2474 };
2475 struct nfs4_lookup_res res = {
2476 .server = server,
2477 .fattr = fattr,
2478 .fh = fhandle,
2479 };
2480 struct rpc_message msg = {
2481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2482 .rpc_argp = &args,
2483 .rpc_resp = &res,
2484 };
2485
2486 nfs_fattr_init(fattr);
2487
2488 dprintk("NFS call lookup %s\n", name->name);
2489 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2490 dprintk("NFS reply lookup: %d\n", status);
2491 return status;
2492}
2493
2494void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2495{
2496 memset(fh, 0, sizeof(struct nfs_fh));
2497 fattr->fsid.major = 1;
2498 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2499 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2500 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2501 fattr->nlink = 2;
2502}
2503
2504static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2505 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2506{
2507 struct nfs4_exception exception = { };
2508 int err;
2509 do {
2510 int status;
2511
2512 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2513 switch (status) {
2514 case -NFS4ERR_BADNAME:
2515 return -ENOENT;
2516 case -NFS4ERR_MOVED:
2517 return nfs4_get_referral(dir, name, fattr, fhandle);
2518 case -NFS4ERR_WRONGSEC:
2519 nfs_fixup_secinfo_attributes(fattr, fhandle);
2520 }
2521 err = nfs4_handle_exception(NFS_SERVER(dir),
2522 status, &exception);
2523 } while (exception.retry);
2524 return err;
2525}
2526
2527static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2528{
2529 struct nfs_server *server = NFS_SERVER(inode);
2530 struct nfs4_accessargs args = {
2531 .fh = NFS_FH(inode),
2532 .bitmask = server->cache_consistency_bitmask,
2533 };
2534 struct nfs4_accessres res = {
2535 .server = server,
2536 };
2537 struct rpc_message msg = {
2538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2539 .rpc_argp = &args,
2540 .rpc_resp = &res,
2541 .rpc_cred = entry->cred,
2542 };
2543 int mode = entry->mask;
2544 int status;
2545
2546 /*
2547 * Determine which access bits we want to ask for...
2548 */
2549 if (mode & MAY_READ)
2550 args.access |= NFS4_ACCESS_READ;
2551 if (S_ISDIR(inode->i_mode)) {
2552 if (mode & MAY_WRITE)
2553 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2554 if (mode & MAY_EXEC)
2555 args.access |= NFS4_ACCESS_LOOKUP;
2556 } else {
2557 if (mode & MAY_WRITE)
2558 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2559 if (mode & MAY_EXEC)
2560 args.access |= NFS4_ACCESS_EXECUTE;
2561 }
2562
2563 res.fattr = nfs_alloc_fattr();
2564 if (res.fattr == NULL)
2565 return -ENOMEM;
2566
2567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2568 if (!status) {
2569 entry->mask = 0;
2570 if (res.access & NFS4_ACCESS_READ)
2571 entry->mask |= MAY_READ;
2572 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2573 entry->mask |= MAY_WRITE;
2574 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2575 entry->mask |= MAY_EXEC;
2576 nfs_refresh_inode(inode, res.fattr);
2577 }
2578 nfs_free_fattr(res.fattr);
2579 return status;
2580}
2581
2582static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2583{
2584 struct nfs4_exception exception = { };
2585 int err;
2586 do {
2587 err = nfs4_handle_exception(NFS_SERVER(inode),
2588 _nfs4_proc_access(inode, entry),
2589 &exception);
2590 } while (exception.retry);
2591 return err;
2592}
2593
2594/*
2595 * TODO: For the time being, we don't try to get any attributes
2596 * along with any of the zero-copy operations READ, READDIR,
2597 * READLINK, WRITE.
2598 *
2599 * In the case of the first three, we want to put the GETATTR
2600 * after the read-type operation -- this is because it is hard
2601 * to predict the length of a GETATTR response in v4, and thus
2602 * align the READ data correctly. This means that the GETATTR
2603 * may end up partially falling into the page cache, and we should
2604 * shift it into the 'tail' of the xdr_buf before processing.
2605 * To do this efficiently, we need to know the total length
2606 * of data received, which doesn't seem to be available outside
2607 * of the RPC layer.
2608 *
2609 * In the case of WRITE, we also want to put the GETATTR after
2610 * the operation -- in this case because we want to make sure
2611 * we get the post-operation mtime and size. This means that
2612 * we can't use xdr_encode_pages() as written: we need a variant
2613 * of it which would leave room in the 'tail' iovec.
2614 *
2615 * Both of these changes to the XDR layer would in fact be quite
2616 * minor, but I decided to leave them for a subsequent patch.
2617 */
2618static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2619 unsigned int pgbase, unsigned int pglen)
2620{
2621 struct nfs4_readlink args = {
2622 .fh = NFS_FH(inode),
2623 .pgbase = pgbase,
2624 .pglen = pglen,
2625 .pages = &page,
2626 };
2627 struct nfs4_readlink_res res;
2628 struct rpc_message msg = {
2629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2630 .rpc_argp = &args,
2631 .rpc_resp = &res,
2632 };
2633
2634 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2635}
2636
2637static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2638 unsigned int pgbase, unsigned int pglen)
2639{
2640 struct nfs4_exception exception = { };
2641 int err;
2642 do {
2643 err = nfs4_handle_exception(NFS_SERVER(inode),
2644 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2645 &exception);
2646 } while (exception.retry);
2647 return err;
2648}
2649
2650/*
2651 * Got race?
2652 * We will need to arrange for the VFS layer to provide an atomic open.
2653 * Until then, this create/open method is prone to inefficiency and race
2654 * conditions due to the lookup, create, and open VFS calls from sys_open()
2655 * placed on the wire.
2656 *
2657 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2658 * The file will be opened again in the subsequent VFS open call
2659 * (nfs4_proc_file_open).
2660 *
2661 * The open for read will just hang around to be used by any process that
2662 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2663 */
2664
2665static int
2666nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2667 int flags, struct nfs_open_context *ctx)
2668{
2669 struct dentry *de = dentry;
2670 struct nfs4_state *state;
2671 struct rpc_cred *cred = NULL;
2672 fmode_t fmode = 0;
2673 int status = 0;
2674
2675 if (ctx != NULL) {
2676 cred = ctx->cred;
2677 de = ctx->dentry;
2678 fmode = ctx->mode;
2679 }
2680 sattr->ia_mode &= ~current_umask();
2681 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2682 d_drop(dentry);
2683 if (IS_ERR(state)) {
2684 status = PTR_ERR(state);
2685 goto out;
2686 }
2687 d_add(dentry, igrab(state->inode));
2688 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2689 if (ctx != NULL)
2690 ctx->state = state;
2691 else
2692 nfs4_close_sync(state, fmode);
2693out:
2694 return status;
2695}
2696
2697static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2698{
2699 struct nfs_server *server = NFS_SERVER(dir);
2700 struct nfs_removeargs args = {
2701 .fh = NFS_FH(dir),
2702 .name.len = name->len,
2703 .name.name = name->name,
2704 .bitmask = server->attr_bitmask,
2705 };
2706 struct nfs_removeres res = {
2707 .server = server,
2708 };
2709 struct rpc_message msg = {
2710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2711 .rpc_argp = &args,
2712 .rpc_resp = &res,
2713 };
2714 int status = -ENOMEM;
2715
2716 res.dir_attr = nfs_alloc_fattr();
2717 if (res.dir_attr == NULL)
2718 goto out;
2719
2720 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2721 if (status == 0) {
2722 update_changeattr(dir, &res.cinfo);
2723 nfs_post_op_update_inode(dir, res.dir_attr);
2724 }
2725 nfs_free_fattr(res.dir_attr);
2726out:
2727 return status;
2728}
2729
2730static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2731{
2732 struct nfs4_exception exception = { };
2733 int err;
2734 do {
2735 err = nfs4_handle_exception(NFS_SERVER(dir),
2736 _nfs4_proc_remove(dir, name),
2737 &exception);
2738 } while (exception.retry);
2739 return err;
2740}
2741
2742static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2743{
2744 struct nfs_server *server = NFS_SERVER(dir);
2745 struct nfs_removeargs *args = msg->rpc_argp;
2746 struct nfs_removeres *res = msg->rpc_resp;
2747
2748 args->bitmask = server->cache_consistency_bitmask;
2749 res->server = server;
2750 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2751 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2752}
2753
2754static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2755{
2756 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2757
2758 if (!nfs4_sequence_done(task, &res->seq_res))
2759 return 0;
2760 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2761 return 0;
2762 update_changeattr(dir, &res->cinfo);
2763 nfs_post_op_update_inode(dir, res->dir_attr);
2764 return 1;
2765}
2766
2767static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2768{
2769 struct nfs_server *server = NFS_SERVER(dir);
2770 struct nfs_renameargs *arg = msg->rpc_argp;
2771 struct nfs_renameres *res = msg->rpc_resp;
2772
2773 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2774 arg->bitmask = server->attr_bitmask;
2775 res->server = server;
2776 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2777}
2778
2779static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2780 struct inode *new_dir)
2781{
2782 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2783
2784 if (!nfs4_sequence_done(task, &res->seq_res))
2785 return 0;
2786 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2787 return 0;
2788
2789 update_changeattr(old_dir, &res->old_cinfo);
2790 nfs_post_op_update_inode(old_dir, res->old_fattr);
2791 update_changeattr(new_dir, &res->new_cinfo);
2792 nfs_post_op_update_inode(new_dir, res->new_fattr);
2793 return 1;
2794}
2795
2796static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2797 struct inode *new_dir, struct qstr *new_name)
2798{
2799 struct nfs_server *server = NFS_SERVER(old_dir);
2800 struct nfs_renameargs arg = {
2801 .old_dir = NFS_FH(old_dir),
2802 .new_dir = NFS_FH(new_dir),
2803 .old_name = old_name,
2804 .new_name = new_name,
2805 .bitmask = server->attr_bitmask,
2806 };
2807 struct nfs_renameres res = {
2808 .server = server,
2809 };
2810 struct rpc_message msg = {
2811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2812 .rpc_argp = &arg,
2813 .rpc_resp = &res,
2814 };
2815 int status = -ENOMEM;
2816
2817 res.old_fattr = nfs_alloc_fattr();
2818 res.new_fattr = nfs_alloc_fattr();
2819 if (res.old_fattr == NULL || res.new_fattr == NULL)
2820 goto out;
2821
2822 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2823 if (!status) {
2824 update_changeattr(old_dir, &res.old_cinfo);
2825 nfs_post_op_update_inode(old_dir, res.old_fattr);
2826 update_changeattr(new_dir, &res.new_cinfo);
2827 nfs_post_op_update_inode(new_dir, res.new_fattr);
2828 }
2829out:
2830 nfs_free_fattr(res.new_fattr);
2831 nfs_free_fattr(res.old_fattr);
2832 return status;
2833}
2834
2835static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2836 struct inode *new_dir, struct qstr *new_name)
2837{
2838 struct nfs4_exception exception = { };
2839 int err;
2840 do {
2841 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2842 _nfs4_proc_rename(old_dir, old_name,
2843 new_dir, new_name),
2844 &exception);
2845 } while (exception.retry);
2846 return err;
2847}
2848
2849static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2850{
2851 struct nfs_server *server = NFS_SERVER(inode);
2852 struct nfs4_link_arg arg = {
2853 .fh = NFS_FH(inode),
2854 .dir_fh = NFS_FH(dir),
2855 .name = name,
2856 .bitmask = server->attr_bitmask,
2857 };
2858 struct nfs4_link_res res = {
2859 .server = server,
2860 };
2861 struct rpc_message msg = {
2862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2863 .rpc_argp = &arg,
2864 .rpc_resp = &res,
2865 };
2866 int status = -ENOMEM;
2867
2868 res.fattr = nfs_alloc_fattr();
2869 res.dir_attr = nfs_alloc_fattr();
2870 if (res.fattr == NULL || res.dir_attr == NULL)
2871 goto out;
2872
2873 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2874 if (!status) {
2875 update_changeattr(dir, &res.cinfo);
2876 nfs_post_op_update_inode(dir, res.dir_attr);
2877 nfs_post_op_update_inode(inode, res.fattr);
2878 }
2879out:
2880 nfs_free_fattr(res.dir_attr);
2881 nfs_free_fattr(res.fattr);
2882 return status;
2883}
2884
2885static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2886{
2887 struct nfs4_exception exception = { };
2888 int err;
2889 do {
2890 err = nfs4_handle_exception(NFS_SERVER(inode),
2891 _nfs4_proc_link(inode, dir, name),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897struct nfs4_createdata {
2898 struct rpc_message msg;
2899 struct nfs4_create_arg arg;
2900 struct nfs4_create_res res;
2901 struct nfs_fh fh;
2902 struct nfs_fattr fattr;
2903 struct nfs_fattr dir_fattr;
2904};
2905
2906static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2907 struct qstr *name, struct iattr *sattr, u32 ftype)
2908{
2909 struct nfs4_createdata *data;
2910
2911 data = kzalloc(sizeof(*data), GFP_KERNEL);
2912 if (data != NULL) {
2913 struct nfs_server *server = NFS_SERVER(dir);
2914
2915 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2916 data->msg.rpc_argp = &data->arg;
2917 data->msg.rpc_resp = &data->res;
2918 data->arg.dir_fh = NFS_FH(dir);
2919 data->arg.server = server;
2920 data->arg.name = name;
2921 data->arg.attrs = sattr;
2922 data->arg.ftype = ftype;
2923 data->arg.bitmask = server->attr_bitmask;
2924 data->res.server = server;
2925 data->res.fh = &data->fh;
2926 data->res.fattr = &data->fattr;
2927 data->res.dir_fattr = &data->dir_fattr;
2928 nfs_fattr_init(data->res.fattr);
2929 nfs_fattr_init(data->res.dir_fattr);
2930 }
2931 return data;
2932}
2933
2934static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2935{
2936 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2937 &data->arg.seq_args, &data->res.seq_res, 1);
2938 if (status == 0) {
2939 update_changeattr(dir, &data->res.dir_cinfo);
2940 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2941 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2942 }
2943 return status;
2944}
2945
2946static void nfs4_free_createdata(struct nfs4_createdata *data)
2947{
2948 kfree(data);
2949}
2950
2951static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2952 struct page *page, unsigned int len, struct iattr *sattr)
2953{
2954 struct nfs4_createdata *data;
2955 int status = -ENAMETOOLONG;
2956
2957 if (len > NFS4_MAXPATHLEN)
2958 goto out;
2959
2960 status = -ENOMEM;
2961 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2962 if (data == NULL)
2963 goto out;
2964
2965 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2966 data->arg.u.symlink.pages = &page;
2967 data->arg.u.symlink.len = len;
2968
2969 status = nfs4_do_create(dir, dentry, data);
2970
2971 nfs4_free_createdata(data);
2972out:
2973 return status;
2974}
2975
2976static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2977 struct page *page, unsigned int len, struct iattr *sattr)
2978{
2979 struct nfs4_exception exception = { };
2980 int err;
2981 do {
2982 err = nfs4_handle_exception(NFS_SERVER(dir),
2983 _nfs4_proc_symlink(dir, dentry, page,
2984 len, sattr),
2985 &exception);
2986 } while (exception.retry);
2987 return err;
2988}
2989
2990static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2991 struct iattr *sattr)
2992{
2993 struct nfs4_createdata *data;
2994 int status = -ENOMEM;
2995
2996 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2997 if (data == NULL)
2998 goto out;
2999
3000 status = nfs4_do_create(dir, dentry, data);
3001
3002 nfs4_free_createdata(data);
3003out:
3004 return status;
3005}
3006
3007static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3008 struct iattr *sattr)
3009{
3010 struct nfs4_exception exception = { };
3011 int err;
3012
3013 sattr->ia_mode &= ~current_umask();
3014 do {
3015 err = nfs4_handle_exception(NFS_SERVER(dir),
3016 _nfs4_proc_mkdir(dir, dentry, sattr),
3017 &exception);
3018 } while (exception.retry);
3019 return err;
3020}
3021
3022static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3023 u64 cookie, struct page **pages, unsigned int count, int plus)
3024{
3025 struct inode *dir = dentry->d_inode;
3026 struct nfs4_readdir_arg args = {
3027 .fh = NFS_FH(dir),
3028 .pages = pages,
3029 .pgbase = 0,
3030 .count = count,
3031 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3032 .plus = plus,
3033 };
3034 struct nfs4_readdir_res res;
3035 struct rpc_message msg = {
3036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3037 .rpc_argp = &args,
3038 .rpc_resp = &res,
3039 .rpc_cred = cred,
3040 };
3041 int status;
3042
3043 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3044 dentry->d_parent->d_name.name,
3045 dentry->d_name.name,
3046 (unsigned long long)cookie);
3047 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3048 res.pgbase = args.pgbase;
3049 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3050 if (status >= 0) {
3051 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3052 status += args.pgbase;
3053 }
3054
3055 nfs_invalidate_atime(dir);
3056
3057 dprintk("%s: returns %d\n", __func__, status);
3058 return status;
3059}
3060
3061static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3062 u64 cookie, struct page **pages, unsigned int count, int plus)
3063{
3064 struct nfs4_exception exception = { };
3065 int err;
3066 do {
3067 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3068 _nfs4_proc_readdir(dentry, cred, cookie,
3069 pages, count, plus),
3070 &exception);
3071 } while (exception.retry);
3072 return err;
3073}
3074
3075static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3076 struct iattr *sattr, dev_t rdev)
3077{
3078 struct nfs4_createdata *data;
3079 int mode = sattr->ia_mode;
3080 int status = -ENOMEM;
3081
3082 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3083 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3084
3085 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3086 if (data == NULL)
3087 goto out;
3088
3089 if (S_ISFIFO(mode))
3090 data->arg.ftype = NF4FIFO;
3091 else if (S_ISBLK(mode)) {
3092 data->arg.ftype = NF4BLK;
3093 data->arg.u.device.specdata1 = MAJOR(rdev);
3094 data->arg.u.device.specdata2 = MINOR(rdev);
3095 }
3096 else if (S_ISCHR(mode)) {
3097 data->arg.ftype = NF4CHR;
3098 data->arg.u.device.specdata1 = MAJOR(rdev);
3099 data->arg.u.device.specdata2 = MINOR(rdev);
3100 }
3101
3102 status = nfs4_do_create(dir, dentry, data);
3103
3104 nfs4_free_createdata(data);
3105out:
3106 return status;
3107}
3108
3109static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3110 struct iattr *sattr, dev_t rdev)
3111{
3112 struct nfs4_exception exception = { };
3113 int err;
3114
3115 sattr->ia_mode &= ~current_umask();
3116 do {
3117 err = nfs4_handle_exception(NFS_SERVER(dir),
3118 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3119 &exception);
3120 } while (exception.retry);
3121 return err;
3122}
3123
3124static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3125 struct nfs_fsstat *fsstat)
3126{
3127 struct nfs4_statfs_arg args = {
3128 .fh = fhandle,
3129 .bitmask = server->attr_bitmask,
3130 };
3131 struct nfs4_statfs_res res = {
3132 .fsstat = fsstat,
3133 };
3134 struct rpc_message msg = {
3135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3136 .rpc_argp = &args,
3137 .rpc_resp = &res,
3138 };
3139
3140 nfs_fattr_init(fsstat->fattr);
3141 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3142}
3143
3144static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3145{
3146 struct nfs4_exception exception = { };
3147 int err;
3148 do {
3149 err = nfs4_handle_exception(server,
3150 _nfs4_proc_statfs(server, fhandle, fsstat),
3151 &exception);
3152 } while (exception.retry);
3153 return err;
3154}
3155
3156static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3157 struct nfs_fsinfo *fsinfo)
3158{
3159 struct nfs4_fsinfo_arg args = {
3160 .fh = fhandle,
3161 .bitmask = server->attr_bitmask,
3162 };
3163 struct nfs4_fsinfo_res res = {
3164 .fsinfo = fsinfo,
3165 };
3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3168 .rpc_argp = &args,
3169 .rpc_resp = &res,
3170 };
3171
3172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3173}
3174
3175static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3176{
3177 struct nfs4_exception exception = { };
3178 int err;
3179
3180 do {
3181 err = nfs4_handle_exception(server,
3182 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3183 &exception);
3184 } while (exception.retry);
3185 return err;
3186}
3187
3188static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3189{
3190 nfs_fattr_init(fsinfo->fattr);
3191 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3192}
3193
3194static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3195 struct nfs_pathconf *pathconf)
3196{
3197 struct nfs4_pathconf_arg args = {
3198 .fh = fhandle,
3199 .bitmask = server->attr_bitmask,
3200 };
3201 struct nfs4_pathconf_res res = {
3202 .pathconf = pathconf,
3203 };
3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3206 .rpc_argp = &args,
3207 .rpc_resp = &res,
3208 };
3209
3210 /* None of the pathconf attributes are mandatory to implement */
3211 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3212 memset(pathconf, 0, sizeof(*pathconf));
3213 return 0;
3214 }
3215
3216 nfs_fattr_init(pathconf->fattr);
3217 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3218}
3219
3220static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3221 struct nfs_pathconf *pathconf)
3222{
3223 struct nfs4_exception exception = { };
3224 int err;
3225
3226 do {
3227 err = nfs4_handle_exception(server,
3228 _nfs4_proc_pathconf(server, fhandle, pathconf),
3229 &exception);
3230 } while (exception.retry);
3231 return err;
3232}
3233
3234void __nfs4_read_done_cb(struct nfs_read_data *data)
3235{
3236 nfs_invalidate_atime(data->inode);
3237}
3238
3239static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3240{
3241 struct nfs_server *server = NFS_SERVER(data->inode);
3242
3243 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3244 rpc_restart_call_prepare(task);
3245 return -EAGAIN;
3246 }
3247
3248 __nfs4_read_done_cb(data);
3249 if (task->tk_status > 0)
3250 renew_lease(server, data->timestamp);
3251 return 0;
3252}
3253
3254static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3255{
3256
3257 dprintk("--> %s\n", __func__);
3258
3259 if (!nfs4_sequence_done(task, &data->res.seq_res))
3260 return -EAGAIN;
3261
3262 return data->read_done_cb ? data->read_done_cb(task, data) :
3263 nfs4_read_done_cb(task, data);
3264}
3265
3266static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3267{
3268 data->timestamp = jiffies;
3269 data->read_done_cb = nfs4_read_done_cb;
3270 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3271 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3272}
3273
3274/* Reset the the nfs_read_data to send the read to the MDS. */
3275void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3276{
3277 dprintk("%s Reset task for i/o through\n", __func__);
3278 put_lseg(data->lseg);
3279 data->lseg = NULL;
3280 /* offsets will differ in the dense stripe case */
3281 data->args.offset = data->mds_offset;
3282 data->ds_clp = NULL;
3283 data->args.fh = NFS_FH(data->inode);
3284 data->read_done_cb = nfs4_read_done_cb;
3285 task->tk_ops = data->mds_ops;
3286 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3287}
3288EXPORT_SYMBOL_GPL(nfs4_reset_read);
3289
3290static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3291{
3292 struct inode *inode = data->inode;
3293
3294 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3295 rpc_restart_call_prepare(task);
3296 return -EAGAIN;
3297 }
3298 if (task->tk_status >= 0) {
3299 renew_lease(NFS_SERVER(inode), data->timestamp);
3300 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3301 }
3302 return 0;
3303}
3304
3305static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3306{
3307 if (!nfs4_sequence_done(task, &data->res.seq_res))
3308 return -EAGAIN;
3309 return data->write_done_cb ? data->write_done_cb(task, data) :
3310 nfs4_write_done_cb(task, data);
3311}
3312
3313/* Reset the the nfs_write_data to send the write to the MDS. */
3314void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3315{
3316 dprintk("%s Reset task for i/o through\n", __func__);
3317 put_lseg(data->lseg);
3318 data->lseg = NULL;
3319 data->ds_clp = NULL;
3320 data->write_done_cb = nfs4_write_done_cb;
3321 data->args.fh = NFS_FH(data->inode);
3322 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3323 data->args.offset = data->mds_offset;
3324 data->res.fattr = &data->fattr;
3325 task->tk_ops = data->mds_ops;
3326 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3327}
3328EXPORT_SYMBOL_GPL(nfs4_reset_write);
3329
3330static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3331{
3332 struct nfs_server *server = NFS_SERVER(data->inode);
3333
3334 if (data->lseg) {
3335 data->args.bitmask = NULL;
3336 data->res.fattr = NULL;
3337 } else
3338 data->args.bitmask = server->cache_consistency_bitmask;
3339 if (!data->write_done_cb)
3340 data->write_done_cb = nfs4_write_done_cb;
3341 data->res.server = server;
3342 data->timestamp = jiffies;
3343
3344 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3345 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3346}
3347
3348static int nfs4_commit_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), NULL) == -EAGAIN) {
3353 rpc_restart_call_prepare(task);
3354 return -EAGAIN;
3355 }
3356 nfs_refresh_inode(inode, data->res.fattr);
3357 return 0;
3358}
3359
3360static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3361{
3362 if (!nfs4_sequence_done(task, &data->res.seq_res))
3363 return -EAGAIN;
3364 return data->write_done_cb(task, data);
3365}
3366
3367static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3368{
3369 struct nfs_server *server = NFS_SERVER(data->inode);
3370
3371 if (data->lseg) {
3372 data->args.bitmask = NULL;
3373 data->res.fattr = NULL;
3374 } else
3375 data->args.bitmask = server->cache_consistency_bitmask;
3376 if (!data->write_done_cb)
3377 data->write_done_cb = nfs4_commit_done_cb;
3378 data->res.server = server;
3379 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3380 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3381}
3382
3383struct nfs4_renewdata {
3384 struct nfs_client *client;
3385 unsigned long timestamp;
3386};
3387
3388/*
3389 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3390 * standalone procedure for queueing an asynchronous RENEW.
3391 */
3392static void nfs4_renew_release(void *calldata)
3393{
3394 struct nfs4_renewdata *data = calldata;
3395 struct nfs_client *clp = data->client;
3396
3397 if (atomic_read(&clp->cl_count) > 1)
3398 nfs4_schedule_state_renewal(clp);
3399 nfs_put_client(clp);
3400 kfree(data);
3401}
3402
3403static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3404{
3405 struct nfs4_renewdata *data = calldata;
3406 struct nfs_client *clp = data->client;
3407 unsigned long timestamp = data->timestamp;
3408
3409 if (task->tk_status < 0) {
3410 /* Unless we're shutting down, schedule state recovery! */
3411 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3412 return;
3413 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3414 nfs4_schedule_lease_recovery(clp);
3415 return;
3416 }
3417 nfs4_schedule_path_down_recovery(clp);
3418 }
3419 do_renew_lease(clp, timestamp);
3420}
3421
3422static const struct rpc_call_ops nfs4_renew_ops = {
3423 .rpc_call_done = nfs4_renew_done,
3424 .rpc_release = nfs4_renew_release,
3425};
3426
3427static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3428{
3429 struct rpc_message msg = {
3430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3431 .rpc_argp = clp,
3432 .rpc_cred = cred,
3433 };
3434 struct nfs4_renewdata *data;
3435
3436 if (renew_flags == 0)
3437 return 0;
3438 if (!atomic_inc_not_zero(&clp->cl_count))
3439 return -EIO;
3440 data = kmalloc(sizeof(*data), GFP_NOFS);
3441 if (data == NULL)
3442 return -ENOMEM;
3443 data->client = clp;
3444 data->timestamp = jiffies;
3445 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3446 &nfs4_renew_ops, data);
3447}
3448
3449static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3450{
3451 struct rpc_message msg = {
3452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3453 .rpc_argp = clp,
3454 .rpc_cred = cred,
3455 };
3456 unsigned long now = jiffies;
3457 int status;
3458
3459 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3460 if (status < 0)
3461 return status;
3462 do_renew_lease(clp, now);
3463 return 0;
3464}
3465
3466static inline int nfs4_server_supports_acls(struct nfs_server *server)
3467{
3468 return (server->caps & NFS_CAP_ACLS)
3469 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3470 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3471}
3472
3473/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3474 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3475 * the stack.
3476 */
3477#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3478
3479static int buf_to_pages_noslab(const void *buf, size_t buflen,
3480 struct page **pages, unsigned int *pgbase)
3481{
3482 struct page *newpage, **spages;
3483 int rc = 0;
3484 size_t len;
3485 spages = pages;
3486
3487 do {
3488 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3489 newpage = alloc_page(GFP_KERNEL);
3490
3491 if (newpage == NULL)
3492 goto unwind;
3493 memcpy(page_address(newpage), buf, len);
3494 buf += len;
3495 buflen -= len;
3496 *pages++ = newpage;
3497 rc++;
3498 } while (buflen != 0);
3499
3500 return rc;
3501
3502unwind:
3503 for(; rc > 0; rc--)
3504 __free_page(spages[rc-1]);
3505 return -ENOMEM;
3506}
3507
3508struct nfs4_cached_acl {
3509 int cached;
3510 size_t len;
3511 char data[0];
3512};
3513
3514static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3515{
3516 struct nfs_inode *nfsi = NFS_I(inode);
3517
3518 spin_lock(&inode->i_lock);
3519 kfree(nfsi->nfs4_acl);
3520 nfsi->nfs4_acl = acl;
3521 spin_unlock(&inode->i_lock);
3522}
3523
3524static void nfs4_zap_acl_attr(struct inode *inode)
3525{
3526 nfs4_set_cached_acl(inode, NULL);
3527}
3528
3529static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3530{
3531 struct nfs_inode *nfsi = NFS_I(inode);
3532 struct nfs4_cached_acl *acl;
3533 int ret = -ENOENT;
3534
3535 spin_lock(&inode->i_lock);
3536 acl = nfsi->nfs4_acl;
3537 if (acl == NULL)
3538 goto out;
3539 if (buf == NULL) /* user is just asking for length */
3540 goto out_len;
3541 if (acl->cached == 0)
3542 goto out;
3543 ret = -ERANGE; /* see getxattr(2) man page */
3544 if (acl->len > buflen)
3545 goto out;
3546 memcpy(buf, acl->data, acl->len);
3547out_len:
3548 ret = acl->len;
3549out:
3550 spin_unlock(&inode->i_lock);
3551 return ret;
3552}
3553
3554static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3555{
3556 struct nfs4_cached_acl *acl;
3557
3558 if (buf && acl_len <= PAGE_SIZE) {
3559 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3560 if (acl == NULL)
3561 goto out;
3562 acl->cached = 1;
3563 memcpy(acl->data, buf, acl_len);
3564 } else {
3565 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3566 if (acl == NULL)
3567 goto out;
3568 acl->cached = 0;
3569 }
3570 acl->len = acl_len;
3571out:
3572 nfs4_set_cached_acl(inode, acl);
3573}
3574
3575/*
3576 * The getxattr API returns the required buffer length when called with a
3577 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3578 * the required buf. On a NULL buf, we send a page of data to the server
3579 * guessing that the ACL request can be serviced by a page. If so, we cache
3580 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3581 * the cache. If not so, we throw away the page, and cache the required
3582 * length. The next getxattr call will then produce another round trip to
3583 * the server, this time with the input buf of the required size.
3584 */
3585static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3586{
3587 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3588 struct nfs_getaclargs args = {
3589 .fh = NFS_FH(inode),
3590 .acl_pages = pages,
3591 .acl_len = buflen,
3592 };
3593 struct nfs_getaclres res = {
3594 .acl_len = buflen,
3595 };
3596 void *resp_buf;
3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3599 .rpc_argp = &args,
3600 .rpc_resp = &res,
3601 };
3602 int ret = -ENOMEM, npages, i, acl_len = 0;
3603
3604 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3605 /* As long as we're doing a round trip to the server anyway,
3606 * let's be prepared for a page of acl data. */
3607 if (npages == 0)
3608 npages = 1;
3609
3610 for (i = 0; i < npages; i++) {
3611 pages[i] = alloc_page(GFP_KERNEL);
3612 if (!pages[i])
3613 goto out_free;
3614 }
3615 if (npages > 1) {
3616 /* for decoding across pages */
3617 args.acl_scratch = alloc_page(GFP_KERNEL);
3618 if (!args.acl_scratch)
3619 goto out_free;
3620 }
3621 args.acl_len = npages * PAGE_SIZE;
3622 args.acl_pgbase = 0;
3623 /* Let decode_getfacl know not to fail if the ACL data is larger than
3624 * the page we send as a guess */
3625 if (buf == NULL)
3626 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3627 resp_buf = page_address(pages[0]);
3628
3629 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3630 __func__, buf, buflen, npages, args.acl_len);
3631 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3632 &msg, &args.seq_args, &res.seq_res, 0);
3633 if (ret)
3634 goto out_free;
3635
3636 acl_len = res.acl_len - res.acl_data_offset;
3637 if (acl_len > args.acl_len)
3638 nfs4_write_cached_acl(inode, NULL, acl_len);
3639 else
3640 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3641 acl_len);
3642 if (buf) {
3643 ret = -ERANGE;
3644 if (acl_len > buflen)
3645 goto out_free;
3646 _copy_from_pages(buf, pages, res.acl_data_offset,
3647 res.acl_len);
3648 }
3649 ret = acl_len;
3650out_free:
3651 for (i = 0; i < npages; i++)
3652 if (pages[i])
3653 __free_page(pages[i]);
3654 if (args.acl_scratch)
3655 __free_page(args.acl_scratch);
3656 return ret;
3657}
3658
3659static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3660{
3661 struct nfs4_exception exception = { };
3662 ssize_t ret;
3663 do {
3664 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3665 if (ret >= 0)
3666 break;
3667 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3668 } while (exception.retry);
3669 return ret;
3670}
3671
3672static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3673{
3674 struct nfs_server *server = NFS_SERVER(inode);
3675 int ret;
3676
3677 if (!nfs4_server_supports_acls(server))
3678 return -EOPNOTSUPP;
3679 ret = nfs_revalidate_inode(server, inode);
3680 if (ret < 0)
3681 return ret;
3682 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3683 nfs_zap_acl_cache(inode);
3684 ret = nfs4_read_cached_acl(inode, buf, buflen);
3685 if (ret != -ENOENT)
3686 /* -ENOENT is returned if there is no ACL or if there is an ACL
3687 * but no cached acl data, just the acl length */
3688 return ret;
3689 return nfs4_get_acl_uncached(inode, buf, buflen);
3690}
3691
3692static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3693{
3694 struct nfs_server *server = NFS_SERVER(inode);
3695 struct page *pages[NFS4ACL_MAXPAGES];
3696 struct nfs_setaclargs arg = {
3697 .fh = NFS_FH(inode),
3698 .acl_pages = pages,
3699 .acl_len = buflen,
3700 };
3701 struct nfs_setaclres res;
3702 struct rpc_message msg = {
3703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3704 .rpc_argp = &arg,
3705 .rpc_resp = &res,
3706 };
3707 int ret, i;
3708
3709 if (!nfs4_server_supports_acls(server))
3710 return -EOPNOTSUPP;
3711 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3712 if (i < 0)
3713 return i;
3714 nfs_inode_return_delegation(inode);
3715 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3716
3717 /*
3718 * Free each page after tx, so the only ref left is
3719 * held by the network stack
3720 */
3721 for (; i > 0; i--)
3722 put_page(pages[i-1]);
3723
3724 /*
3725 * Acl update can result in inode attribute update.
3726 * so mark the attribute cache invalid.
3727 */
3728 spin_lock(&inode->i_lock);
3729 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3730 spin_unlock(&inode->i_lock);
3731 nfs_access_zap_cache(inode);
3732 nfs_zap_acl_cache(inode);
3733 return ret;
3734}
3735
3736static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3737{
3738 struct nfs4_exception exception = { };
3739 int err;
3740 do {
3741 err = nfs4_handle_exception(NFS_SERVER(inode),
3742 __nfs4_proc_set_acl(inode, buf, buflen),
3743 &exception);
3744 } while (exception.retry);
3745 return err;
3746}
3747
3748static int
3749nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3750{
3751 struct nfs_client *clp = server->nfs_client;
3752
3753 if (task->tk_status >= 0)
3754 return 0;
3755 switch(task->tk_status) {
3756 case -NFS4ERR_ADMIN_REVOKED:
3757 case -NFS4ERR_BAD_STATEID:
3758 case -NFS4ERR_OPENMODE:
3759 if (state == NULL)
3760 break;
3761 nfs4_schedule_stateid_recovery(server, state);
3762 goto wait_on_recovery;
3763 case -NFS4ERR_EXPIRED:
3764 if (state != NULL)
3765 nfs4_schedule_stateid_recovery(server, state);
3766 case -NFS4ERR_STALE_STATEID:
3767 case -NFS4ERR_STALE_CLIENTID:
3768 nfs4_schedule_lease_recovery(clp);
3769 goto wait_on_recovery;
3770#if defined(CONFIG_NFS_V4_1)
3771 case -NFS4ERR_BADSESSION:
3772 case -NFS4ERR_BADSLOT:
3773 case -NFS4ERR_BAD_HIGH_SLOT:
3774 case -NFS4ERR_DEADSESSION:
3775 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3776 case -NFS4ERR_SEQ_FALSE_RETRY:
3777 case -NFS4ERR_SEQ_MISORDERED:
3778 dprintk("%s ERROR %d, Reset session\n", __func__,
3779 task->tk_status);
3780 nfs4_schedule_session_recovery(clp->cl_session);
3781 task->tk_status = 0;
3782 return -EAGAIN;
3783#endif /* CONFIG_NFS_V4_1 */
3784 case -NFS4ERR_DELAY:
3785 nfs_inc_server_stats(server, NFSIOS_DELAY);
3786 case -NFS4ERR_GRACE:
3787 case -EKEYEXPIRED:
3788 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3789 task->tk_status = 0;
3790 return -EAGAIN;
3791 case -NFS4ERR_RETRY_UNCACHED_REP:
3792 case -NFS4ERR_OLD_STATEID:
3793 task->tk_status = 0;
3794 return -EAGAIN;
3795 }
3796 task->tk_status = nfs4_map_errors(task->tk_status);
3797 return 0;
3798wait_on_recovery:
3799 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3800 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3801 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3802 task->tk_status = 0;
3803 return -EAGAIN;
3804}
3805
3806int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3807 unsigned short port, struct rpc_cred *cred,
3808 struct nfs4_setclientid_res *res)
3809{
3810 nfs4_verifier sc_verifier;
3811 struct nfs4_setclientid setclientid = {
3812 .sc_verifier = &sc_verifier,
3813 .sc_prog = program,
3814 .sc_cb_ident = clp->cl_cb_ident,
3815 };
3816 struct rpc_message msg = {
3817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3818 .rpc_argp = &setclientid,
3819 .rpc_resp = res,
3820 .rpc_cred = cred,
3821 };
3822 __be32 *p;
3823 int loop = 0;
3824 int status;
3825
3826 p = (__be32*)sc_verifier.data;
3827 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3828 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3829
3830 for(;;) {
3831 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3832 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3833 clp->cl_ipaddr,
3834 rpc_peeraddr2str(clp->cl_rpcclient,
3835 RPC_DISPLAY_ADDR),
3836 rpc_peeraddr2str(clp->cl_rpcclient,
3837 RPC_DISPLAY_PROTO),
3838 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3839 clp->cl_id_uniquifier);
3840 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3841 sizeof(setclientid.sc_netid),
3842 rpc_peeraddr2str(clp->cl_rpcclient,
3843 RPC_DISPLAY_NETID));
3844 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3845 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3846 clp->cl_ipaddr, port >> 8, port & 255);
3847
3848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3849 if (status != -NFS4ERR_CLID_INUSE)
3850 break;
3851 if (loop != 0) {
3852 ++clp->cl_id_uniquifier;
3853 break;
3854 }
3855 ++loop;
3856 ssleep(clp->cl_lease_time / HZ + 1);
3857 }
3858 return status;
3859}
3860
3861int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3862 struct nfs4_setclientid_res *arg,
3863 struct rpc_cred *cred)
3864{
3865 struct nfs_fsinfo fsinfo;
3866 struct rpc_message msg = {
3867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3868 .rpc_argp = arg,
3869 .rpc_resp = &fsinfo,
3870 .rpc_cred = cred,
3871 };
3872 unsigned long now;
3873 int status;
3874
3875 now = jiffies;
3876 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3877 if (status == 0) {
3878 spin_lock(&clp->cl_lock);
3879 clp->cl_lease_time = fsinfo.lease_time * HZ;
3880 clp->cl_last_renewal = now;
3881 spin_unlock(&clp->cl_lock);
3882 }
3883 return status;
3884}
3885
3886struct nfs4_delegreturndata {
3887 struct nfs4_delegreturnargs args;
3888 struct nfs4_delegreturnres res;
3889 struct nfs_fh fh;
3890 nfs4_stateid stateid;
3891 unsigned long timestamp;
3892 struct nfs_fattr fattr;
3893 int rpc_status;
3894};
3895
3896static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3897{
3898 struct nfs4_delegreturndata *data = calldata;
3899
3900 if (!nfs4_sequence_done(task, &data->res.seq_res))
3901 return;
3902
3903 switch (task->tk_status) {
3904 case -NFS4ERR_STALE_STATEID:
3905 case -NFS4ERR_EXPIRED:
3906 case 0:
3907 renew_lease(data->res.server, data->timestamp);
3908 break;
3909 default:
3910 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3911 -EAGAIN) {
3912 rpc_restart_call_prepare(task);
3913 return;
3914 }
3915 }
3916 data->rpc_status = task->tk_status;
3917}
3918
3919static void nfs4_delegreturn_release(void *calldata)
3920{
3921 kfree(calldata);
3922}
3923
3924#if defined(CONFIG_NFS_V4_1)
3925static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3926{
3927 struct nfs4_delegreturndata *d_data;
3928
3929 d_data = (struct nfs4_delegreturndata *)data;
3930
3931 if (nfs4_setup_sequence(d_data->res.server,
3932 &d_data->args.seq_args,
3933 &d_data->res.seq_res, task))
3934 return;
3935 rpc_call_start(task);
3936}
3937#endif /* CONFIG_NFS_V4_1 */
3938
3939static const struct rpc_call_ops nfs4_delegreturn_ops = {
3940#if defined(CONFIG_NFS_V4_1)
3941 .rpc_call_prepare = nfs4_delegreturn_prepare,
3942#endif /* CONFIG_NFS_V4_1 */
3943 .rpc_call_done = nfs4_delegreturn_done,
3944 .rpc_release = nfs4_delegreturn_release,
3945};
3946
3947static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3948{
3949 struct nfs4_delegreturndata *data;
3950 struct nfs_server *server = NFS_SERVER(inode);
3951 struct rpc_task *task;
3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3954 .rpc_cred = cred,
3955 };
3956 struct rpc_task_setup task_setup_data = {
3957 .rpc_client = server->client,
3958 .rpc_message = &msg,
3959 .callback_ops = &nfs4_delegreturn_ops,
3960 .flags = RPC_TASK_ASYNC,
3961 };
3962 int status = 0;
3963
3964 data = kzalloc(sizeof(*data), GFP_NOFS);
3965 if (data == NULL)
3966 return -ENOMEM;
3967 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3968 data->args.fhandle = &data->fh;
3969 data->args.stateid = &data->stateid;
3970 data->args.bitmask = server->attr_bitmask;
3971 nfs_copy_fh(&data->fh, NFS_FH(inode));
3972 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3973 data->res.fattr = &data->fattr;
3974 data->res.server = server;
3975 nfs_fattr_init(data->res.fattr);
3976 data->timestamp = jiffies;
3977 data->rpc_status = 0;
3978
3979 task_setup_data.callback_data = data;
3980 msg.rpc_argp = &data->args;
3981 msg.rpc_resp = &data->res;
3982 task = rpc_run_task(&task_setup_data);
3983 if (IS_ERR(task))
3984 return PTR_ERR(task);
3985 if (!issync)
3986 goto out;
3987 status = nfs4_wait_for_completion_rpc_task(task);
3988 if (status != 0)
3989 goto out;
3990 status = data->rpc_status;
3991 if (status != 0)
3992 goto out;
3993 nfs_refresh_inode(inode, &data->fattr);
3994out:
3995 rpc_put_task(task);
3996 return status;
3997}
3998
3999int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4000{
4001 struct nfs_server *server = NFS_SERVER(inode);
4002 struct nfs4_exception exception = { };
4003 int err;
4004 do {
4005 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4006 switch (err) {
4007 case -NFS4ERR_STALE_STATEID:
4008 case -NFS4ERR_EXPIRED:
4009 case 0:
4010 return 0;
4011 }
4012 err = nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4014 return err;
4015}
4016
4017#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4018#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4019
4020/*
4021 * sleep, with exponential backoff, and retry the LOCK operation.
4022 */
4023static unsigned long
4024nfs4_set_lock_task_retry(unsigned long timeout)
4025{
4026 freezable_schedule_timeout_killable(timeout);
4027 timeout <<= 1;
4028 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4029 return NFS4_LOCK_MAXTIMEOUT;
4030 return timeout;
4031}
4032
4033static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4034{
4035 struct inode *inode = state->inode;
4036 struct nfs_server *server = NFS_SERVER(inode);
4037 struct nfs_client *clp = server->nfs_client;
4038 struct nfs_lockt_args arg = {
4039 .fh = NFS_FH(inode),
4040 .fl = request,
4041 };
4042 struct nfs_lockt_res res = {
4043 .denied = request,
4044 };
4045 struct rpc_message msg = {
4046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4047 .rpc_argp = &arg,
4048 .rpc_resp = &res,
4049 .rpc_cred = state->owner->so_cred,
4050 };
4051 struct nfs4_lock_state *lsp;
4052 int status;
4053
4054 arg.lock_owner.clientid = clp->cl_clientid;
4055 status = nfs4_set_lock_state(state, request);
4056 if (status != 0)
4057 goto out;
4058 lsp = request->fl_u.nfs4_fl.owner;
4059 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4060 arg.lock_owner.s_dev = server->s_dev;
4061 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4062 switch (status) {
4063 case 0:
4064 request->fl_type = F_UNLCK;
4065 break;
4066 case -NFS4ERR_DENIED:
4067 status = 0;
4068 }
4069 request->fl_ops->fl_release_private(request);
4070out:
4071 return status;
4072}
4073
4074static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4075{
4076 struct nfs4_exception exception = { };
4077 int err;
4078
4079 do {
4080 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4081 _nfs4_proc_getlk(state, cmd, request),
4082 &exception);
4083 } while (exception.retry);
4084 return err;
4085}
4086
4087static int do_vfs_lock(struct file *file, struct file_lock *fl)
4088{
4089 int res = 0;
4090 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4091 case FL_POSIX:
4092 res = posix_lock_file_wait(file, fl);
4093 break;
4094 case FL_FLOCK:
4095 res = flock_lock_file_wait(file, fl);
4096 break;
4097 default:
4098 BUG();
4099 }
4100 return res;
4101}
4102
4103struct nfs4_unlockdata {
4104 struct nfs_locku_args arg;
4105 struct nfs_locku_res res;
4106 struct nfs4_lock_state *lsp;
4107 struct nfs_open_context *ctx;
4108 struct file_lock fl;
4109 const struct nfs_server *server;
4110 unsigned long timestamp;
4111};
4112
4113static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4114 struct nfs_open_context *ctx,
4115 struct nfs4_lock_state *lsp,
4116 struct nfs_seqid *seqid)
4117{
4118 struct nfs4_unlockdata *p;
4119 struct inode *inode = lsp->ls_state->inode;
4120
4121 p = kzalloc(sizeof(*p), GFP_NOFS);
4122 if (p == NULL)
4123 return NULL;
4124 p->arg.fh = NFS_FH(inode);
4125 p->arg.fl = &p->fl;
4126 p->arg.seqid = seqid;
4127 p->res.seqid = seqid;
4128 p->arg.stateid = &lsp->ls_stateid;
4129 p->lsp = lsp;
4130 atomic_inc(&lsp->ls_count);
4131 /* Ensure we don't close file until we're done freeing locks! */
4132 p->ctx = get_nfs_open_context(ctx);
4133 memcpy(&p->fl, fl, sizeof(p->fl));
4134 p->server = NFS_SERVER(inode);
4135 return p;
4136}
4137
4138static void nfs4_locku_release_calldata(void *data)
4139{
4140 struct nfs4_unlockdata *calldata = data;
4141 nfs_free_seqid(calldata->arg.seqid);
4142 nfs4_put_lock_state(calldata->lsp);
4143 put_nfs_open_context(calldata->ctx);
4144 kfree(calldata);
4145}
4146
4147static void nfs4_locku_done(struct rpc_task *task, void *data)
4148{
4149 struct nfs4_unlockdata *calldata = data;
4150
4151 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4152 return;
4153 switch (task->tk_status) {
4154 case 0:
4155 memcpy(calldata->lsp->ls_stateid.data,
4156 calldata->res.stateid.data,
4157 sizeof(calldata->lsp->ls_stateid.data));
4158 renew_lease(calldata->server, calldata->timestamp);
4159 break;
4160 case -NFS4ERR_BAD_STATEID:
4161 case -NFS4ERR_OLD_STATEID:
4162 case -NFS4ERR_STALE_STATEID:
4163 case -NFS4ERR_EXPIRED:
4164 break;
4165 default:
4166 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4167 rpc_restart_call_prepare(task);
4168 }
4169}
4170
4171static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4172{
4173 struct nfs4_unlockdata *calldata = data;
4174
4175 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4176 return;
4177 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4178 /* Note: exit _without_ running nfs4_locku_done */
4179 task->tk_action = NULL;
4180 return;
4181 }
4182 calldata->timestamp = jiffies;
4183 if (nfs4_setup_sequence(calldata->server,
4184 &calldata->arg.seq_args,
4185 &calldata->res.seq_res, task))
4186 return;
4187 rpc_call_start(task);
4188}
4189
4190static const struct rpc_call_ops nfs4_locku_ops = {
4191 .rpc_call_prepare = nfs4_locku_prepare,
4192 .rpc_call_done = nfs4_locku_done,
4193 .rpc_release = nfs4_locku_release_calldata,
4194};
4195
4196static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4197 struct nfs_open_context *ctx,
4198 struct nfs4_lock_state *lsp,
4199 struct nfs_seqid *seqid)
4200{
4201 struct nfs4_unlockdata *data;
4202 struct rpc_message msg = {
4203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4204 .rpc_cred = ctx->cred,
4205 };
4206 struct rpc_task_setup task_setup_data = {
4207 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4208 .rpc_message = &msg,
4209 .callback_ops = &nfs4_locku_ops,
4210 .workqueue = nfsiod_workqueue,
4211 .flags = RPC_TASK_ASYNC,
4212 };
4213
4214 /* Ensure this is an unlock - when canceling a lock, the
4215 * canceled lock is passed in, and it won't be an unlock.
4216 */
4217 fl->fl_type = F_UNLCK;
4218
4219 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4220 if (data == NULL) {
4221 nfs_free_seqid(seqid);
4222 return ERR_PTR(-ENOMEM);
4223 }
4224
4225 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4226 msg.rpc_argp = &data->arg;
4227 msg.rpc_resp = &data->res;
4228 task_setup_data.callback_data = data;
4229 return rpc_run_task(&task_setup_data);
4230}
4231
4232static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4233{
4234 struct nfs_inode *nfsi = NFS_I(state->inode);
4235 struct nfs_seqid *seqid;
4236 struct nfs4_lock_state *lsp;
4237 struct rpc_task *task;
4238 int status = 0;
4239 unsigned char fl_flags = request->fl_flags;
4240
4241 status = nfs4_set_lock_state(state, request);
4242 /* Unlock _before_ we do the RPC call */
4243 request->fl_flags |= FL_EXISTS;
4244 down_read(&nfsi->rwsem);
4245 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4246 up_read(&nfsi->rwsem);
4247 goto out;
4248 }
4249 up_read(&nfsi->rwsem);
4250 if (status != 0)
4251 goto out;
4252 /* Is this a delegated lock? */
4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4254 goto out;
4255 lsp = request->fl_u.nfs4_fl.owner;
4256 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4257 status = -ENOMEM;
4258 if (seqid == NULL)
4259 goto out;
4260 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4261 status = PTR_ERR(task);
4262 if (IS_ERR(task))
4263 goto out;
4264 status = nfs4_wait_for_completion_rpc_task(task);
4265 rpc_put_task(task);
4266out:
4267 request->fl_flags = fl_flags;
4268 return status;
4269}
4270
4271struct nfs4_lockdata {
4272 struct nfs_lock_args arg;
4273 struct nfs_lock_res res;
4274 struct nfs4_lock_state *lsp;
4275 struct nfs_open_context *ctx;
4276 struct file_lock fl;
4277 unsigned long timestamp;
4278 int rpc_status;
4279 int cancelled;
4280 struct nfs_server *server;
4281};
4282
4283static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4284 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4285 gfp_t gfp_mask)
4286{
4287 struct nfs4_lockdata *p;
4288 struct inode *inode = lsp->ls_state->inode;
4289 struct nfs_server *server = NFS_SERVER(inode);
4290
4291 p = kzalloc(sizeof(*p), gfp_mask);
4292 if (p == NULL)
4293 return NULL;
4294
4295 p->arg.fh = NFS_FH(inode);
4296 p->arg.fl = &p->fl;
4297 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4298 if (p->arg.open_seqid == NULL)
4299 goto out_free;
4300 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4301 if (p->arg.lock_seqid == NULL)
4302 goto out_free_seqid;
4303 p->arg.lock_stateid = &lsp->ls_stateid;
4304 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4305 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4306 p->arg.lock_owner.s_dev = server->s_dev;
4307 p->res.lock_seqid = p->arg.lock_seqid;
4308 p->lsp = lsp;
4309 p->server = server;
4310 atomic_inc(&lsp->ls_count);
4311 p->ctx = get_nfs_open_context(ctx);
4312 memcpy(&p->fl, fl, sizeof(p->fl));
4313 return p;
4314out_free_seqid:
4315 nfs_free_seqid(p->arg.open_seqid);
4316out_free:
4317 kfree(p);
4318 return NULL;
4319}
4320
4321static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4322{
4323 struct nfs4_lockdata *data = calldata;
4324 struct nfs4_state *state = data->lsp->ls_state;
4325
4326 dprintk("%s: begin!\n", __func__);
4327 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4328 return;
4329 /* Do we need to do an open_to_lock_owner? */
4330 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4331 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4332 return;
4333 data->arg.open_stateid = &state->stateid;
4334 data->arg.new_lock_owner = 1;
4335 data->res.open_seqid = data->arg.open_seqid;
4336 } else
4337 data->arg.new_lock_owner = 0;
4338 data->timestamp = jiffies;
4339 if (nfs4_setup_sequence(data->server,
4340 &data->arg.seq_args,
4341 &data->res.seq_res, task))
4342 return;
4343 rpc_call_start(task);
4344 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4345}
4346
4347static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4348{
4349 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4350 nfs4_lock_prepare(task, calldata);
4351}
4352
4353static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4354{
4355 struct nfs4_lockdata *data = calldata;
4356
4357 dprintk("%s: begin!\n", __func__);
4358
4359 if (!nfs4_sequence_done(task, &data->res.seq_res))
4360 return;
4361
4362 data->rpc_status = task->tk_status;
4363 if (data->arg.new_lock_owner != 0) {
4364 if (data->rpc_status == 0)
4365 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4366 else
4367 goto out;
4368 }
4369 if (data->rpc_status == 0) {
4370 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4371 sizeof(data->lsp->ls_stateid.data));
4372 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4373 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4374 }
4375out:
4376 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4377}
4378
4379static void nfs4_lock_release(void *calldata)
4380{
4381 struct nfs4_lockdata *data = calldata;
4382
4383 dprintk("%s: begin!\n", __func__);
4384 nfs_free_seqid(data->arg.open_seqid);
4385 if (data->cancelled != 0) {
4386 struct rpc_task *task;
4387 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4388 data->arg.lock_seqid);
4389 if (!IS_ERR(task))
4390 rpc_put_task_async(task);
4391 dprintk("%s: cancelling lock!\n", __func__);
4392 } else
4393 nfs_free_seqid(data->arg.lock_seqid);
4394 nfs4_put_lock_state(data->lsp);
4395 put_nfs_open_context(data->ctx);
4396 kfree(data);
4397 dprintk("%s: done!\n", __func__);
4398}
4399
4400static const struct rpc_call_ops nfs4_lock_ops = {
4401 .rpc_call_prepare = nfs4_lock_prepare,
4402 .rpc_call_done = nfs4_lock_done,
4403 .rpc_release = nfs4_lock_release,
4404};
4405
4406static const struct rpc_call_ops nfs4_recover_lock_ops = {
4407 .rpc_call_prepare = nfs4_recover_lock_prepare,
4408 .rpc_call_done = nfs4_lock_done,
4409 .rpc_release = nfs4_lock_release,
4410};
4411
4412static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4413{
4414 switch (error) {
4415 case -NFS4ERR_ADMIN_REVOKED:
4416 case -NFS4ERR_BAD_STATEID:
4417 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4418 if (new_lock_owner != 0 ||
4419 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4420 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4421 break;
4422 case -NFS4ERR_STALE_STATEID:
4423 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4424 case -NFS4ERR_EXPIRED:
4425 nfs4_schedule_lease_recovery(server->nfs_client);
4426 };
4427}
4428
4429static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4430{
4431 struct nfs4_lockdata *data;
4432 struct rpc_task *task;
4433 struct rpc_message msg = {
4434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4435 .rpc_cred = state->owner->so_cred,
4436 };
4437 struct rpc_task_setup task_setup_data = {
4438 .rpc_client = NFS_CLIENT(state->inode),
4439 .rpc_message = &msg,
4440 .callback_ops = &nfs4_lock_ops,
4441 .workqueue = nfsiod_workqueue,
4442 .flags = RPC_TASK_ASYNC,
4443 };
4444 int ret;
4445
4446 dprintk("%s: begin!\n", __func__);
4447 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4448 fl->fl_u.nfs4_fl.owner,
4449 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4450 if (data == NULL)
4451 return -ENOMEM;
4452 if (IS_SETLKW(cmd))
4453 data->arg.block = 1;
4454 if (recovery_type > NFS_LOCK_NEW) {
4455 if (recovery_type == NFS_LOCK_RECLAIM)
4456 data->arg.reclaim = NFS_LOCK_RECLAIM;
4457 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4458 }
4459 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4460 msg.rpc_argp = &data->arg;
4461 msg.rpc_resp = &data->res;
4462 task_setup_data.callback_data = data;
4463 task = rpc_run_task(&task_setup_data);
4464 if (IS_ERR(task))
4465 return PTR_ERR(task);
4466 ret = nfs4_wait_for_completion_rpc_task(task);
4467 if (ret == 0) {
4468 ret = data->rpc_status;
4469 if (ret)
4470 nfs4_handle_setlk_error(data->server, data->lsp,
4471 data->arg.new_lock_owner, ret);
4472 } else
4473 data->cancelled = 1;
4474 rpc_put_task(task);
4475 dprintk("%s: done, ret = %d!\n", __func__, ret);
4476 return ret;
4477}
4478
4479static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4480{
4481 struct nfs_server *server = NFS_SERVER(state->inode);
4482 struct nfs4_exception exception = { };
4483 int err;
4484
4485 do {
4486 /* Cache the lock if possible... */
4487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4488 return 0;
4489 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4490 if (err != -NFS4ERR_DELAY)
4491 break;
4492 nfs4_handle_exception(server, err, &exception);
4493 } while (exception.retry);
4494 return err;
4495}
4496
4497static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4498{
4499 struct nfs_server *server = NFS_SERVER(state->inode);
4500 struct nfs4_exception exception = { };
4501 int err;
4502
4503 err = nfs4_set_lock_state(state, request);
4504 if (err != 0)
4505 return err;
4506 do {
4507 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4508 return 0;
4509 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4510 switch (err) {
4511 default:
4512 goto out;
4513 case -NFS4ERR_GRACE:
4514 case -NFS4ERR_DELAY:
4515 nfs4_handle_exception(server, err, &exception);
4516 err = 0;
4517 }
4518 } while (exception.retry);
4519out:
4520 return err;
4521}
4522
4523#if defined(CONFIG_NFS_V4_1)
4524static int nfs41_check_expired_locks(struct nfs4_state *state)
4525{
4526 int status, ret = NFS_OK;
4527 struct nfs4_lock_state *lsp;
4528 struct nfs_server *server = NFS_SERVER(state->inode);
4529
4530 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4531 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4532 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4533 if (status != NFS_OK) {
4534 nfs41_free_stateid(server, &lsp->ls_stateid);
4535 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4536 ret = status;
4537 }
4538 }
4539 };
4540
4541 return ret;
4542}
4543
4544static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4545{
4546 int status = NFS_OK;
4547
4548 if (test_bit(LK_STATE_IN_USE, &state->flags))
4549 status = nfs41_check_expired_locks(state);
4550 if (status == NFS_OK)
4551 return status;
4552 return nfs4_lock_expired(state, request);
4553}
4554#endif
4555
4556static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4557{
4558 struct nfs_inode *nfsi = NFS_I(state->inode);
4559 unsigned char fl_flags = request->fl_flags;
4560 int status = -ENOLCK;
4561
4562 if ((fl_flags & FL_POSIX) &&
4563 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4564 goto out;
4565 /* Is this a delegated open? */
4566 status = nfs4_set_lock_state(state, request);
4567 if (status != 0)
4568 goto out;
4569 request->fl_flags |= FL_ACCESS;
4570 status = do_vfs_lock(request->fl_file, request);
4571 if (status < 0)
4572 goto out;
4573 down_read(&nfsi->rwsem);
4574 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4575 /* Yes: cache locks! */
4576 /* ...but avoid races with delegation recall... */
4577 request->fl_flags = fl_flags & ~FL_SLEEP;
4578 status = do_vfs_lock(request->fl_file, request);
4579 goto out_unlock;
4580 }
4581 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4582 if (status != 0)
4583 goto out_unlock;
4584 /* Note: we always want to sleep here! */
4585 request->fl_flags = fl_flags | FL_SLEEP;
4586 if (do_vfs_lock(request->fl_file, request) < 0)
4587 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4588 "manager!\n", __func__);
4589out_unlock:
4590 up_read(&nfsi->rwsem);
4591out:
4592 request->fl_flags = fl_flags;
4593 return status;
4594}
4595
4596static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4597{
4598 struct nfs4_exception exception = { };
4599 int err;
4600
4601 do {
4602 err = _nfs4_proc_setlk(state, cmd, request);
4603 if (err == -NFS4ERR_DENIED)
4604 err = -EAGAIN;
4605 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4606 err, &exception);
4607 } while (exception.retry);
4608 return err;
4609}
4610
4611static int
4612nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4613{
4614 struct nfs_open_context *ctx;
4615 struct nfs4_state *state;
4616 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4617 int status;
4618
4619 /* verify open state */
4620 ctx = nfs_file_open_context(filp);
4621 state = ctx->state;
4622
4623 if (request->fl_start < 0 || request->fl_end < 0)
4624 return -EINVAL;
4625
4626 if (IS_GETLK(cmd)) {
4627 if (state != NULL)
4628 return nfs4_proc_getlk(state, F_GETLK, request);
4629 return 0;
4630 }
4631
4632 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4633 return -EINVAL;
4634
4635 if (request->fl_type == F_UNLCK) {
4636 if (state != NULL)
4637 return nfs4_proc_unlck(state, cmd, request);
4638 return 0;
4639 }
4640
4641 if (state == NULL)
4642 return -ENOLCK;
4643 do {
4644 status = nfs4_proc_setlk(state, cmd, request);
4645 if ((status != -EAGAIN) || IS_SETLK(cmd))
4646 break;
4647 timeout = nfs4_set_lock_task_retry(timeout);
4648 status = -ERESTARTSYS;
4649 if (signalled())
4650 break;
4651 } while(status < 0);
4652 return status;
4653}
4654
4655int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4656{
4657 struct nfs_server *server = NFS_SERVER(state->inode);
4658 struct nfs4_exception exception = { };
4659 int err;
4660
4661 err = nfs4_set_lock_state(state, fl);
4662 if (err != 0)
4663 goto out;
4664 do {
4665 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4666 switch (err) {
4667 default:
4668 printk(KERN_ERR "NFS: %s: unhandled error "
4669 "%d.\n", __func__, err);
4670 case 0:
4671 case -ESTALE:
4672 goto out;
4673 case -NFS4ERR_EXPIRED:
4674 nfs4_schedule_stateid_recovery(server, state);
4675 case -NFS4ERR_STALE_CLIENTID:
4676 case -NFS4ERR_STALE_STATEID:
4677 nfs4_schedule_lease_recovery(server->nfs_client);
4678 goto out;
4679 case -NFS4ERR_BADSESSION:
4680 case -NFS4ERR_BADSLOT:
4681 case -NFS4ERR_BAD_HIGH_SLOT:
4682 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4683 case -NFS4ERR_DEADSESSION:
4684 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4685 goto out;
4686 case -ERESTARTSYS:
4687 /*
4688 * The show must go on: exit, but mark the
4689 * stateid as needing recovery.
4690 */
4691 case -NFS4ERR_ADMIN_REVOKED:
4692 case -NFS4ERR_BAD_STATEID:
4693 case -NFS4ERR_OPENMODE:
4694 nfs4_schedule_stateid_recovery(server, state);
4695 err = 0;
4696 goto out;
4697 case -EKEYEXPIRED:
4698 /*
4699 * User RPCSEC_GSS context has expired.
4700 * We cannot recover this stateid now, so
4701 * skip it and allow recovery thread to
4702 * proceed.
4703 */
4704 err = 0;
4705 goto out;
4706 case -ENOMEM:
4707 case -NFS4ERR_DENIED:
4708 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4709 err = 0;
4710 goto out;
4711 case -NFS4ERR_DELAY:
4712 break;
4713 }
4714 err = nfs4_handle_exception(server, err, &exception);
4715 } while (exception.retry);
4716out:
4717 return err;
4718}
4719
4720static void nfs4_release_lockowner_release(void *calldata)
4721{
4722 kfree(calldata);
4723}
4724
4725const struct rpc_call_ops nfs4_release_lockowner_ops = {
4726 .rpc_release = nfs4_release_lockowner_release,
4727};
4728
4729void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4730{
4731 struct nfs_server *server = lsp->ls_state->owner->so_server;
4732 struct nfs_release_lockowner_args *args;
4733 struct rpc_message msg = {
4734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4735 };
4736
4737 if (server->nfs_client->cl_mvops->minor_version != 0)
4738 return;
4739 args = kmalloc(sizeof(*args), GFP_NOFS);
4740 if (!args)
4741 return;
4742 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4743 args->lock_owner.id = lsp->ls_seqid.owner_id;
4744 args->lock_owner.s_dev = server->s_dev;
4745 msg.rpc_argp = args;
4746 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4747}
4748
4749#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4750
4751static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4752 const void *buf, size_t buflen,
4753 int flags, int type)
4754{
4755 if (strcmp(key, "") != 0)
4756 return -EINVAL;
4757
4758 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4759}
4760
4761static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4762 void *buf, size_t buflen, int type)
4763{
4764 if (strcmp(key, "") != 0)
4765 return -EINVAL;
4766
4767 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4768}
4769
4770static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4771 size_t list_len, const char *name,
4772 size_t name_len, int type)
4773{
4774 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4775
4776 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4777 return 0;
4778
4779 if (list && len <= list_len)
4780 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4781 return len;
4782}
4783
4784/*
4785 * nfs_fhget will use either the mounted_on_fileid or the fileid
4786 */
4787static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4788{
4789 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4790 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4791 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4792 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4793 return;
4794
4795 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4796 NFS_ATTR_FATTR_NLINK;
4797 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4798 fattr->nlink = 2;
4799}
4800
4801int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4802 struct nfs4_fs_locations *fs_locations, struct page *page)
4803{
4804 struct nfs_server *server = NFS_SERVER(dir);
4805 u32 bitmask[2] = {
4806 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4807 };
4808 struct nfs4_fs_locations_arg args = {
4809 .dir_fh = NFS_FH(dir),
4810 .name = name,
4811 .page = page,
4812 .bitmask = bitmask,
4813 };
4814 struct nfs4_fs_locations_res res = {
4815 .fs_locations = fs_locations,
4816 };
4817 struct rpc_message msg = {
4818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4819 .rpc_argp = &args,
4820 .rpc_resp = &res,
4821 };
4822 int status;
4823
4824 dprintk("%s: start\n", __func__);
4825
4826 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4827 * is not supported */
4828 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4829 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4830 else
4831 bitmask[0] |= FATTR4_WORD0_FILEID;
4832
4833 nfs_fattr_init(&fs_locations->fattr);
4834 fs_locations->server = server;
4835 fs_locations->nlocations = 0;
4836 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4837 dprintk("%s: returned status = %d\n", __func__, status);
4838 return status;
4839}
4840
4841static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4842{
4843 int status;
4844 struct nfs4_secinfo_arg args = {
4845 .dir_fh = NFS_FH(dir),
4846 .name = name,
4847 };
4848 struct nfs4_secinfo_res res = {
4849 .flavors = flavors,
4850 };
4851 struct rpc_message msg = {
4852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4853 .rpc_argp = &args,
4854 .rpc_resp = &res,
4855 };
4856
4857 dprintk("NFS call secinfo %s\n", name->name);
4858 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4859 dprintk("NFS reply secinfo: %d\n", status);
4860 return status;
4861}
4862
4863int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4864{
4865 struct nfs4_exception exception = { };
4866 int err;
4867 do {
4868 err = nfs4_handle_exception(NFS_SERVER(dir),
4869 _nfs4_proc_secinfo(dir, name, flavors),
4870 &exception);
4871 } while (exception.retry);
4872 return err;
4873}
4874
4875#ifdef CONFIG_NFS_V4_1
4876/*
4877 * Check the exchange flags returned by the server for invalid flags, having
4878 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4879 * DS flags set.
4880 */
4881static int nfs4_check_cl_exchange_flags(u32 flags)
4882{
4883 if (flags & ~EXCHGID4_FLAG_MASK_R)
4884 goto out_inval;
4885 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4886 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4887 goto out_inval;
4888 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4889 goto out_inval;
4890 return NFS_OK;
4891out_inval:
4892 return -NFS4ERR_INVAL;
4893}
4894
4895static bool
4896nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4897{
4898 if (a->server_scope_sz == b->server_scope_sz &&
4899 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4900 return true;
4901
4902 return false;
4903}
4904
4905/*
4906 * nfs4_proc_exchange_id()
4907 *
4908 * Since the clientid has expired, all compounds using sessions
4909 * associated with the stale clientid will be returning
4910 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4911 * be in some phase of session reset.
4912 */
4913int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4914{
4915 nfs4_verifier verifier;
4916 struct nfs41_exchange_id_args args = {
4917 .client = clp,
4918 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4919 };
4920 struct nfs41_exchange_id_res res = {
4921 .client = clp,
4922 };
4923 int status;
4924 struct rpc_message msg = {
4925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4926 .rpc_argp = &args,
4927 .rpc_resp = &res,
4928 .rpc_cred = cred,
4929 };
4930 __be32 *p;
4931
4932 dprintk("--> %s\n", __func__);
4933 BUG_ON(clp == NULL);
4934
4935 p = (u32 *)verifier.data;
4936 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4937 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4938 args.verifier = &verifier;
4939
4940 args.id_len = scnprintf(args.id, sizeof(args.id),
4941 "%s/%s.%s/%u",
4942 clp->cl_ipaddr,
4943 init_utsname()->nodename,
4944 init_utsname()->domainname,
4945 clp->cl_rpcclient->cl_auth->au_flavor);
4946
4947 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4948 if (unlikely(!res.server_scope)) {
4949 status = -ENOMEM;
4950 goto out;
4951 }
4952
4953 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4954 if (unlikely(!res.impl_id)) {
4955 status = -ENOMEM;
4956 goto out_server_scope;
4957 }
4958
4959 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4960 if (!status)
4961 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4962
4963 if (!status) {
4964 /* use the most recent implementation id */
4965 kfree(clp->impl_id);
4966 clp->impl_id = res.impl_id;
4967 } else
4968 kfree(res.impl_id);
4969
4970 if (!status) {
4971 if (clp->server_scope &&
4972 !nfs41_same_server_scope(clp->server_scope,
4973 res.server_scope)) {
4974 dprintk("%s: server_scope mismatch detected\n",
4975 __func__);
4976 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4977 kfree(clp->server_scope);
4978 clp->server_scope = NULL;
4979 }
4980
4981 if (!clp->server_scope) {
4982 clp->server_scope = res.server_scope;
4983 goto out;
4984 }
4985 }
4986
4987out_server_scope:
4988 kfree(res.server_scope);
4989out:
4990 if (clp->impl_id)
4991 dprintk("%s: Server Implementation ID: "
4992 "domain: %s, name: %s, date: %llu,%u\n",
4993 __func__, clp->impl_id->domain, clp->impl_id->name,
4994 clp->impl_id->date.seconds,
4995 clp->impl_id->date.nseconds);
4996 dprintk("<-- %s status= %d\n", __func__, status);
4997 return status;
4998}
4999
5000struct nfs4_get_lease_time_data {
5001 struct nfs4_get_lease_time_args *args;
5002 struct nfs4_get_lease_time_res *res;
5003 struct nfs_client *clp;
5004};
5005
5006static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5007 void *calldata)
5008{
5009 int ret;
5010 struct nfs4_get_lease_time_data *data =
5011 (struct nfs4_get_lease_time_data *)calldata;
5012
5013 dprintk("--> %s\n", __func__);
5014 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5015 /* just setup sequence, do not trigger session recovery
5016 since we're invoked within one */
5017 ret = nfs41_setup_sequence(data->clp->cl_session,
5018 &data->args->la_seq_args,
5019 &data->res->lr_seq_res, task);
5020
5021 BUG_ON(ret == -EAGAIN);
5022 rpc_call_start(task);
5023 dprintk("<-- %s\n", __func__);
5024}
5025
5026/*
5027 * Called from nfs4_state_manager thread for session setup, so don't recover
5028 * from sequence operation or clientid errors.
5029 */
5030static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5031{
5032 struct nfs4_get_lease_time_data *data =
5033 (struct nfs4_get_lease_time_data *)calldata;
5034
5035 dprintk("--> %s\n", __func__);
5036 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5037 return;
5038 switch (task->tk_status) {
5039 case -NFS4ERR_DELAY:
5040 case -NFS4ERR_GRACE:
5041 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5042 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5043 task->tk_status = 0;
5044 /* fall through */
5045 case -NFS4ERR_RETRY_UNCACHED_REP:
5046 rpc_restart_call_prepare(task);
5047 return;
5048 }
5049 dprintk("<-- %s\n", __func__);
5050}
5051
5052struct rpc_call_ops nfs4_get_lease_time_ops = {
5053 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5054 .rpc_call_done = nfs4_get_lease_time_done,
5055};
5056
5057int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5058{
5059 struct rpc_task *task;
5060 struct nfs4_get_lease_time_args args;
5061 struct nfs4_get_lease_time_res res = {
5062 .lr_fsinfo = fsinfo,
5063 };
5064 struct nfs4_get_lease_time_data data = {
5065 .args = &args,
5066 .res = &res,
5067 .clp = clp,
5068 };
5069 struct rpc_message msg = {
5070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5071 .rpc_argp = &args,
5072 .rpc_resp = &res,
5073 };
5074 struct rpc_task_setup task_setup = {
5075 .rpc_client = clp->cl_rpcclient,
5076 .rpc_message = &msg,
5077 .callback_ops = &nfs4_get_lease_time_ops,
5078 .callback_data = &data,
5079 .flags = RPC_TASK_TIMEOUT,
5080 };
5081 int status;
5082
5083 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5084 dprintk("--> %s\n", __func__);
5085 task = rpc_run_task(&task_setup);
5086
5087 if (IS_ERR(task))
5088 status = PTR_ERR(task);
5089 else {
5090 status = task->tk_status;
5091 rpc_put_task(task);
5092 }
5093 dprintk("<-- %s return %d\n", __func__, status);
5094
5095 return status;
5096}
5097
5098/*
5099 * Reset a slot table
5100 */
5101static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5102 int ivalue)
5103{
5104 struct nfs4_slot *new = NULL;
5105 int i;
5106 int ret = 0;
5107
5108 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5109 max_reqs, tbl->max_slots);
5110
5111 /* Does the newly negotiated max_reqs match the existing slot table? */
5112 if (max_reqs != tbl->max_slots) {
5113 ret = -ENOMEM;
5114 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5115 GFP_NOFS);
5116 if (!new)
5117 goto out;
5118 ret = 0;
5119 kfree(tbl->slots);
5120 }
5121 spin_lock(&tbl->slot_tbl_lock);
5122 if (new) {
5123 tbl->slots = new;
5124 tbl->max_slots = max_reqs;
5125 }
5126 for (i = 0; i < tbl->max_slots; ++i)
5127 tbl->slots[i].seq_nr = ivalue;
5128 spin_unlock(&tbl->slot_tbl_lock);
5129 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5130 tbl, tbl->slots, tbl->max_slots);
5131out:
5132 dprintk("<-- %s: return %d\n", __func__, ret);
5133 return ret;
5134}
5135
5136/* Destroy the slot table */
5137static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5138{
5139 if (session->fc_slot_table.slots != NULL) {
5140 kfree(session->fc_slot_table.slots);
5141 session->fc_slot_table.slots = NULL;
5142 }
5143 if (session->bc_slot_table.slots != NULL) {
5144 kfree(session->bc_slot_table.slots);
5145 session->bc_slot_table.slots = NULL;
5146 }
5147 return;
5148}
5149
5150/*
5151 * Initialize slot table
5152 */
5153static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5154 int max_slots, int ivalue)
5155{
5156 struct nfs4_slot *slot;
5157 int ret = -ENOMEM;
5158
5159 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5160
5161 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5162
5163 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5164 if (!slot)
5165 goto out;
5166 ret = 0;
5167
5168 spin_lock(&tbl->slot_tbl_lock);
5169 tbl->max_slots = max_slots;
5170 tbl->slots = slot;
5171 tbl->highest_used_slotid = NFS4_NO_SLOT; /* no slot is currently used */
5172 spin_unlock(&tbl->slot_tbl_lock);
5173 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5174 tbl, tbl->slots, tbl->max_slots);
5175out:
5176 dprintk("<-- %s: return %d\n", __func__, ret);
5177 return ret;
5178}
5179
5180/*
5181 * Initialize or reset the forechannel and backchannel tables
5182 */
5183static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5184{
5185 struct nfs4_slot_table *tbl;
5186 int status;
5187
5188 dprintk("--> %s\n", __func__);
5189 /* Fore channel */
5190 tbl = &ses->fc_slot_table;
5191 if (tbl->slots == NULL) {
5192 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5193 if (status) /* -ENOMEM */
5194 return status;
5195 } else {
5196 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5197 if (status)
5198 return status;
5199 }
5200 /* Back channel */
5201 tbl = &ses->bc_slot_table;
5202 if (tbl->slots == NULL) {
5203 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5204 if (status)
5205 /* Fore and back channel share a connection so get
5206 * both slot tables or neither */
5207 nfs4_destroy_slot_tables(ses);
5208 } else
5209 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5210 return status;
5211}
5212
5213struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5214{
5215 struct nfs4_session *session;
5216 struct nfs4_slot_table *tbl;
5217
5218 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5219 if (!session)
5220 return NULL;
5221
5222 tbl = &session->fc_slot_table;
5223 tbl->highest_used_slotid = NFS4_NO_SLOT;
5224 spin_lock_init(&tbl->slot_tbl_lock);
5225 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5226 init_completion(&tbl->complete);
5227
5228 tbl = &session->bc_slot_table;
5229 tbl->highest_used_slotid = NFS4_NO_SLOT;
5230 spin_lock_init(&tbl->slot_tbl_lock);
5231 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5232 init_completion(&tbl->complete);
5233
5234 session->session_state = 1<<NFS4_SESSION_INITING;
5235
5236 session->clp = clp;
5237 return session;
5238}
5239
5240void nfs4_destroy_session(struct nfs4_session *session)
5241{
5242 nfs4_proc_destroy_session(session);
5243 dprintk("%s Destroy backchannel for xprt %p\n",
5244 __func__, session->clp->cl_rpcclient->cl_xprt);
5245 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5246 NFS41_BC_MIN_CALLBACKS);
5247 nfs4_destroy_slot_tables(session);
5248 kfree(session);
5249}
5250
5251/*
5252 * Initialize the values to be used by the client in CREATE_SESSION
5253 * If nfs4_init_session set the fore channel request and response sizes,
5254 * use them.
5255 *
5256 * Set the back channel max_resp_sz_cached to zero to force the client to
5257 * always set csa_cachethis to FALSE because the current implementation
5258 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5259 */
5260static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5261{
5262 struct nfs4_session *session = args->client->cl_session;
5263 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5264 mxresp_sz = session->fc_attrs.max_resp_sz;
5265
5266 if (mxrqst_sz == 0)
5267 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5268 if (mxresp_sz == 0)
5269 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5270 /* Fore channel attributes */
5271 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5272 args->fc_attrs.max_resp_sz = mxresp_sz;
5273 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5274 args->fc_attrs.max_reqs = max_session_slots;
5275
5276 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5277 "max_ops=%u max_reqs=%u\n",
5278 __func__,
5279 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5280 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5281
5282 /* Back channel attributes */
5283 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5284 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5285 args->bc_attrs.max_resp_sz_cached = 0;
5286 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5287 args->bc_attrs.max_reqs = 1;
5288
5289 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5290 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5291 __func__,
5292 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5293 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5294 args->bc_attrs.max_reqs);
5295}
5296
5297static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5298{
5299 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5300 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5301
5302 if (rcvd->max_resp_sz > sent->max_resp_sz)
5303 return -EINVAL;
5304 /*
5305 * Our requested max_ops is the minimum we need; we're not
5306 * prepared to break up compounds into smaller pieces than that.
5307 * So, no point even trying to continue if the server won't
5308 * cooperate:
5309 */
5310 if (rcvd->max_ops < sent->max_ops)
5311 return -EINVAL;
5312 if (rcvd->max_reqs == 0)
5313 return -EINVAL;
5314 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5315 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5316 return 0;
5317}
5318
5319static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5320{
5321 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5322 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5323
5324 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5325 return -EINVAL;
5326 if (rcvd->max_resp_sz < sent->max_resp_sz)
5327 return -EINVAL;
5328 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5329 return -EINVAL;
5330 /* These would render the backchannel useless: */
5331 if (rcvd->max_ops != sent->max_ops)
5332 return -EINVAL;
5333 if (rcvd->max_reqs != sent->max_reqs)
5334 return -EINVAL;
5335 return 0;
5336}
5337
5338static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5339 struct nfs4_session *session)
5340{
5341 int ret;
5342
5343 ret = nfs4_verify_fore_channel_attrs(args, session);
5344 if (ret)
5345 return ret;
5346 return nfs4_verify_back_channel_attrs(args, session);
5347}
5348
5349static int _nfs4_proc_create_session(struct nfs_client *clp)
5350{
5351 struct nfs4_session *session = clp->cl_session;
5352 struct nfs41_create_session_args args = {
5353 .client = clp,
5354 .cb_program = NFS4_CALLBACK,
5355 };
5356 struct nfs41_create_session_res res = {
5357 .client = clp,
5358 };
5359 struct rpc_message msg = {
5360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5361 .rpc_argp = &args,
5362 .rpc_resp = &res,
5363 };
5364 int status;
5365
5366 nfs4_init_channel_attrs(&args);
5367 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5368
5369 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5370
5371 if (!status)
5372 /* Verify the session's negotiated channel_attrs values */
5373 status = nfs4_verify_channel_attrs(&args, session);
5374 if (!status) {
5375 /* Increment the clientid slot sequence id */
5376 clp->cl_seqid++;
5377 }
5378
5379 return status;
5380}
5381
5382/*
5383 * Issues a CREATE_SESSION operation to the server.
5384 * It is the responsibility of the caller to verify the session is
5385 * expired before calling this routine.
5386 */
5387int nfs4_proc_create_session(struct nfs_client *clp)
5388{
5389 int status;
5390 unsigned *ptr;
5391 struct nfs4_session *session = clp->cl_session;
5392
5393 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5394
5395 status = _nfs4_proc_create_session(clp);
5396 if (status)
5397 goto out;
5398
5399 /* Init or reset the session slot tables */
5400 status = nfs4_setup_session_slot_tables(session);
5401 dprintk("slot table setup returned %d\n", status);
5402 if (status)
5403 goto out;
5404
5405 ptr = (unsigned *)&session->sess_id.data[0];
5406 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5407 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5408out:
5409 dprintk("<-- %s\n", __func__);
5410 return status;
5411}
5412
5413/*
5414 * Issue the over-the-wire RPC DESTROY_SESSION.
5415 * The caller must serialize access to this routine.
5416 */
5417int nfs4_proc_destroy_session(struct nfs4_session *session)
5418{
5419 int status = 0;
5420 struct rpc_message msg;
5421
5422 dprintk("--> nfs4_proc_destroy_session\n");
5423
5424 /* session is still being setup */
5425 if (session->clp->cl_cons_state != NFS_CS_READY)
5426 return status;
5427
5428 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5429 msg.rpc_argp = session;
5430 msg.rpc_resp = NULL;
5431 msg.rpc_cred = NULL;
5432 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5433
5434 if (status)
5435 printk(KERN_WARNING
5436 "NFS: Got error %d from the server on DESTROY_SESSION. "
5437 "Session has been destroyed regardless...\n", status);
5438
5439 dprintk("<-- nfs4_proc_destroy_session\n");
5440 return status;
5441}
5442
5443int nfs4_init_session(struct nfs_server *server)
5444{
5445 struct nfs_client *clp = server->nfs_client;
5446 struct nfs4_session *session;
5447 unsigned int rsize, wsize;
5448 int ret;
5449
5450 if (!nfs4_has_session(clp))
5451 return 0;
5452
5453 session = clp->cl_session;
5454 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5455 return 0;
5456
5457 rsize = server->rsize;
5458 if (rsize == 0)
5459 rsize = NFS_MAX_FILE_IO_SIZE;
5460 wsize = server->wsize;
5461 if (wsize == 0)
5462 wsize = NFS_MAX_FILE_IO_SIZE;
5463
5464 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5465 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5466
5467 ret = nfs4_recover_expired_lease(server);
5468 if (!ret)
5469 ret = nfs4_check_client_ready(clp);
5470 return ret;
5471}
5472
5473int nfs4_init_ds_session(struct nfs_client *clp)
5474{
5475 struct nfs4_session *session = clp->cl_session;
5476 int ret;
5477
5478 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5479 return 0;
5480
5481 ret = nfs4_client_recover_expired_lease(clp);
5482 if (!ret)
5483 /* Test for the DS role */
5484 if (!is_ds_client(clp))
5485 ret = -ENODEV;
5486 if (!ret)
5487 ret = nfs4_check_client_ready(clp);
5488 return ret;
5489
5490}
5491EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5492
5493
5494/*
5495 * Renew the cl_session lease.
5496 */
5497struct nfs4_sequence_data {
5498 struct nfs_client *clp;
5499 struct nfs4_sequence_args args;
5500 struct nfs4_sequence_res res;
5501};
5502
5503static void nfs41_sequence_release(void *data)
5504{
5505 struct nfs4_sequence_data *calldata = data;
5506 struct nfs_client *clp = calldata->clp;
5507
5508 if (atomic_read(&clp->cl_count) > 1)
5509 nfs4_schedule_state_renewal(clp);
5510 nfs_put_client(clp);
5511 kfree(calldata);
5512}
5513
5514static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5515{
5516 switch(task->tk_status) {
5517 case -NFS4ERR_DELAY:
5518 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5519 return -EAGAIN;
5520 default:
5521 nfs4_schedule_lease_recovery(clp);
5522 }
5523 return 0;
5524}
5525
5526static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5527{
5528 struct nfs4_sequence_data *calldata = data;
5529 struct nfs_client *clp = calldata->clp;
5530
5531 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5532 return;
5533
5534 if (task->tk_status < 0) {
5535 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5536 if (atomic_read(&clp->cl_count) == 1)
5537 goto out;
5538
5539 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5540 rpc_restart_call_prepare(task);
5541 return;
5542 }
5543 }
5544 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5545out:
5546 dprintk("<-- %s\n", __func__);
5547}
5548
5549static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5550{
5551 struct nfs4_sequence_data *calldata = data;
5552 struct nfs_client *clp = calldata->clp;
5553 struct nfs4_sequence_args *args;
5554 struct nfs4_sequence_res *res;
5555
5556 args = task->tk_msg.rpc_argp;
5557 res = task->tk_msg.rpc_resp;
5558
5559 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5560 return;
5561 rpc_call_start(task);
5562}
5563
5564static const struct rpc_call_ops nfs41_sequence_ops = {
5565 .rpc_call_done = nfs41_sequence_call_done,
5566 .rpc_call_prepare = nfs41_sequence_prepare,
5567 .rpc_release = nfs41_sequence_release,
5568};
5569
5570static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5571{
5572 struct nfs4_sequence_data *calldata;
5573 struct rpc_message msg = {
5574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5575 .rpc_cred = cred,
5576 };
5577 struct rpc_task_setup task_setup_data = {
5578 .rpc_client = clp->cl_rpcclient,
5579 .rpc_message = &msg,
5580 .callback_ops = &nfs41_sequence_ops,
5581 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5582 };
5583
5584 if (!atomic_inc_not_zero(&clp->cl_count))
5585 return ERR_PTR(-EIO);
5586 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5587 if (calldata == NULL) {
5588 nfs_put_client(clp);
5589 return ERR_PTR(-ENOMEM);
5590 }
5591 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5592 msg.rpc_argp = &calldata->args;
5593 msg.rpc_resp = &calldata->res;
5594 calldata->clp = clp;
5595 task_setup_data.callback_data = calldata;
5596
5597 return rpc_run_task(&task_setup_data);
5598}
5599
5600static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5601{
5602 struct rpc_task *task;
5603 int ret = 0;
5604
5605 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5606 return 0;
5607 task = _nfs41_proc_sequence(clp, cred);
5608 if (IS_ERR(task))
5609 ret = PTR_ERR(task);
5610 else
5611 rpc_put_task_async(task);
5612 dprintk("<-- %s status=%d\n", __func__, ret);
5613 return ret;
5614}
5615
5616static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5617{
5618 struct rpc_task *task;
5619 int ret;
5620
5621 task = _nfs41_proc_sequence(clp, cred);
5622 if (IS_ERR(task)) {
5623 ret = PTR_ERR(task);
5624 goto out;
5625 }
5626 ret = rpc_wait_for_completion_task(task);
5627 if (!ret) {
5628 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5629
5630 if (task->tk_status == 0)
5631 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5632 ret = task->tk_status;
5633 }
5634 rpc_put_task(task);
5635out:
5636 dprintk("<-- %s status=%d\n", __func__, ret);
5637 return ret;
5638}
5639
5640struct nfs4_reclaim_complete_data {
5641 struct nfs_client *clp;
5642 struct nfs41_reclaim_complete_args arg;
5643 struct nfs41_reclaim_complete_res res;
5644};
5645
5646static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5647{
5648 struct nfs4_reclaim_complete_data *calldata = data;
5649
5650 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5651 if (nfs41_setup_sequence(calldata->clp->cl_session,
5652 &calldata->arg.seq_args,
5653 &calldata->res.seq_res, task))
5654 return;
5655
5656 rpc_call_start(task);
5657}
5658
5659static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5660{
5661 switch(task->tk_status) {
5662 case 0:
5663 case -NFS4ERR_COMPLETE_ALREADY:
5664 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5665 break;
5666 case -NFS4ERR_DELAY:
5667 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5668 /* fall through */
5669 case -NFS4ERR_RETRY_UNCACHED_REP:
5670 return -EAGAIN;
5671 default:
5672 nfs4_schedule_lease_recovery(clp);
5673 }
5674 return 0;
5675}
5676
5677static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5678{
5679 struct nfs4_reclaim_complete_data *calldata = data;
5680 struct nfs_client *clp = calldata->clp;
5681 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5682
5683 dprintk("--> %s\n", __func__);
5684 if (!nfs41_sequence_done(task, res))
5685 return;
5686
5687 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5688 rpc_restart_call_prepare(task);
5689 return;
5690 }
5691 dprintk("<-- %s\n", __func__);
5692}
5693
5694static void nfs4_free_reclaim_complete_data(void *data)
5695{
5696 struct nfs4_reclaim_complete_data *calldata = data;
5697
5698 kfree(calldata);
5699}
5700
5701static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5702 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5703 .rpc_call_done = nfs4_reclaim_complete_done,
5704 .rpc_release = nfs4_free_reclaim_complete_data,
5705};
5706
5707/*
5708 * Issue a global reclaim complete.
5709 */
5710static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5711{
5712 struct nfs4_reclaim_complete_data *calldata;
5713 struct rpc_task *task;
5714 struct rpc_message msg = {
5715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5716 };
5717 struct rpc_task_setup task_setup_data = {
5718 .rpc_client = clp->cl_rpcclient,
5719 .rpc_message = &msg,
5720 .callback_ops = &nfs4_reclaim_complete_call_ops,
5721 .flags = RPC_TASK_ASYNC,
5722 };
5723 int status = -ENOMEM;
5724
5725 dprintk("--> %s\n", __func__);
5726 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5727 if (calldata == NULL)
5728 goto out;
5729 calldata->clp = clp;
5730 calldata->arg.one_fs = 0;
5731
5732 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5733 msg.rpc_argp = &calldata->arg;
5734 msg.rpc_resp = &calldata->res;
5735 task_setup_data.callback_data = calldata;
5736 task = rpc_run_task(&task_setup_data);
5737 if (IS_ERR(task)) {
5738 status = PTR_ERR(task);
5739 goto out;
5740 }
5741 status = nfs4_wait_for_completion_rpc_task(task);
5742 if (status == 0)
5743 status = task->tk_status;
5744 rpc_put_task(task);
5745 return 0;
5746out:
5747 dprintk("<-- %s status=%d\n", __func__, status);
5748 return status;
5749}
5750
5751static void
5752nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5753{
5754 struct nfs4_layoutget *lgp = calldata;
5755 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5756
5757 dprintk("--> %s\n", __func__);
5758 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5759 * right now covering the LAYOUTGET we are about to send.
5760 * However, that is not so catastrophic, and there seems
5761 * to be no way to prevent it completely.
5762 */
5763 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5764 &lgp->res.seq_res, task))
5765 return;
5766 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5767 NFS_I(lgp->args.inode)->layout,
5768 lgp->args.ctx->state)) {
5769 rpc_exit(task, NFS4_OK);
5770 return;
5771 }
5772 rpc_call_start(task);
5773}
5774
5775static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5776{
5777 struct nfs4_layoutget *lgp = calldata;
5778 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5779
5780 dprintk("--> %s\n", __func__);
5781
5782 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5783 return;
5784
5785 switch (task->tk_status) {
5786 case 0:
5787 break;
5788 case -NFS4ERR_LAYOUTTRYLATER:
5789 case -NFS4ERR_RECALLCONFLICT:
5790 task->tk_status = -NFS4ERR_DELAY;
5791 /* Fall through */
5792 default:
5793 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5794 rpc_restart_call_prepare(task);
5795 return;
5796 }
5797 }
5798 dprintk("<-- %s\n", __func__);
5799}
5800
5801static void nfs4_layoutget_release(void *calldata)
5802{
5803 struct nfs4_layoutget *lgp = calldata;
5804
5805 dprintk("--> %s\n", __func__);
5806 put_nfs_open_context(lgp->args.ctx);
5807 kfree(calldata);
5808 dprintk("<-- %s\n", __func__);
5809}
5810
5811static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5812 .rpc_call_prepare = nfs4_layoutget_prepare,
5813 .rpc_call_done = nfs4_layoutget_done,
5814 .rpc_release = nfs4_layoutget_release,
5815};
5816
5817int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5818{
5819 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5820 struct rpc_task *task;
5821 struct rpc_message msg = {
5822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5823 .rpc_argp = &lgp->args,
5824 .rpc_resp = &lgp->res,
5825 };
5826 struct rpc_task_setup task_setup_data = {
5827 .rpc_client = server->client,
5828 .rpc_message = &msg,
5829 .callback_ops = &nfs4_layoutget_call_ops,
5830 .callback_data = lgp,
5831 .flags = RPC_TASK_ASYNC,
5832 };
5833 int status = 0;
5834
5835 dprintk("--> %s\n", __func__);
5836
5837 lgp->res.layoutp = &lgp->args.layout;
5838 lgp->res.seq_res.sr_slot = NULL;
5839 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5840 task = rpc_run_task(&task_setup_data);
5841 if (IS_ERR(task))
5842 return PTR_ERR(task);
5843 status = nfs4_wait_for_completion_rpc_task(task);
5844 if (status == 0)
5845 status = task->tk_status;
5846 if (status == 0)
5847 status = pnfs_layout_process(lgp);
5848 rpc_put_task(task);
5849 dprintk("<-- %s status=%d\n", __func__, status);
5850 return status;
5851}
5852
5853static void
5854nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5855{
5856 struct nfs4_layoutreturn *lrp = calldata;
5857
5858 dprintk("--> %s\n", __func__);
5859 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5860 &lrp->res.seq_res, task))
5861 return;
5862 rpc_call_start(task);
5863}
5864
5865static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5866{
5867 struct nfs4_layoutreturn *lrp = calldata;
5868 struct nfs_server *server;
5869 struct pnfs_layout_hdr *lo = lrp->args.layout;
5870
5871 dprintk("--> %s\n", __func__);
5872
5873 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5874 return;
5875
5876 server = NFS_SERVER(lrp->args.inode);
5877 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5878 rpc_restart_call_prepare(task);
5879 return;
5880 }
5881 spin_lock(&lo->plh_inode->i_lock);
5882 if (task->tk_status == 0) {
5883 if (lrp->res.lrs_present) {
5884 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5885 } else
5886 BUG_ON(!list_empty(&lo->plh_segs));
5887 }
5888 lo->plh_block_lgets--;
5889 spin_unlock(&lo->plh_inode->i_lock);
5890 dprintk("<-- %s\n", __func__);
5891}
5892
5893static void nfs4_layoutreturn_release(void *calldata)
5894{
5895 struct nfs4_layoutreturn *lrp = calldata;
5896
5897 dprintk("--> %s\n", __func__);
5898 put_layout_hdr(lrp->args.layout);
5899 kfree(calldata);
5900 dprintk("<-- %s\n", __func__);
5901}
5902
5903static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5904 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5905 .rpc_call_done = nfs4_layoutreturn_done,
5906 .rpc_release = nfs4_layoutreturn_release,
5907};
5908
5909int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5910{
5911 struct rpc_task *task;
5912 struct rpc_message msg = {
5913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5914 .rpc_argp = &lrp->args,
5915 .rpc_resp = &lrp->res,
5916 };
5917 struct rpc_task_setup task_setup_data = {
5918 .rpc_client = lrp->clp->cl_rpcclient,
5919 .rpc_message = &msg,
5920 .callback_ops = &nfs4_layoutreturn_call_ops,
5921 .callback_data = lrp,
5922 };
5923 int status;
5924
5925 dprintk("--> %s\n", __func__);
5926 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5927 task = rpc_run_task(&task_setup_data);
5928 if (IS_ERR(task))
5929 return PTR_ERR(task);
5930 status = task->tk_status;
5931 dprintk("<-- %s status=%d\n", __func__, status);
5932 rpc_put_task(task);
5933 return status;
5934}
5935
5936/*
5937 * Retrieve the list of Data Server devices from the MDS.
5938 */
5939static int _nfs4_getdevicelist(struct nfs_server *server,
5940 const struct nfs_fh *fh,
5941 struct pnfs_devicelist *devlist)
5942{
5943 struct nfs4_getdevicelist_args args = {
5944 .fh = fh,
5945 .layoutclass = server->pnfs_curr_ld->id,
5946 };
5947 struct nfs4_getdevicelist_res res = {
5948 .devlist = devlist,
5949 };
5950 struct rpc_message msg = {
5951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5952 .rpc_argp = &args,
5953 .rpc_resp = &res,
5954 };
5955 int status;
5956
5957 dprintk("--> %s\n", __func__);
5958 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5959 &res.seq_res, 0);
5960 dprintk("<-- %s status=%d\n", __func__, status);
5961 return status;
5962}
5963
5964int nfs4_proc_getdevicelist(struct nfs_server *server,
5965 const struct nfs_fh *fh,
5966 struct pnfs_devicelist *devlist)
5967{
5968 struct nfs4_exception exception = { };
5969 int err;
5970
5971 do {
5972 err = nfs4_handle_exception(server,
5973 _nfs4_getdevicelist(server, fh, devlist),
5974 &exception);
5975 } while (exception.retry);
5976
5977 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5978 err, devlist->num_devs);
5979
5980 return err;
5981}
5982EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5983
5984static int
5985_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5986{
5987 struct nfs4_getdeviceinfo_args args = {
5988 .pdev = pdev,
5989 };
5990 struct nfs4_getdeviceinfo_res res = {
5991 .pdev = pdev,
5992 };
5993 struct rpc_message msg = {
5994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5995 .rpc_argp = &args,
5996 .rpc_resp = &res,
5997 };
5998 int status;
5999
6000 dprintk("--> %s\n", __func__);
6001 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6002 dprintk("<-- %s status=%d\n", __func__, status);
6003
6004 return status;
6005}
6006
6007int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6008{
6009 struct nfs4_exception exception = { };
6010 int err;
6011
6012 do {
6013 err = nfs4_handle_exception(server,
6014 _nfs4_proc_getdeviceinfo(server, pdev),
6015 &exception);
6016 } while (exception.retry);
6017 return err;
6018}
6019EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6020
6021static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6022{
6023 struct nfs4_layoutcommit_data *data = calldata;
6024 struct nfs_server *server = NFS_SERVER(data->args.inode);
6025
6026 if (nfs4_setup_sequence(server, &data->args.seq_args,
6027 &data->res.seq_res, task))
6028 return;
6029 rpc_call_start(task);
6030}
6031
6032static void
6033nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6034{
6035 struct nfs4_layoutcommit_data *data = calldata;
6036 struct nfs_server *server = NFS_SERVER(data->args.inode);
6037
6038 if (!nfs4_sequence_done(task, &data->res.seq_res))
6039 return;
6040
6041 switch (task->tk_status) { /* Just ignore these failures */
6042 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6043 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6044 case NFS4ERR_BADLAYOUT: /* no layout */
6045 case NFS4ERR_GRACE: /* loca_recalim always false */
6046 task->tk_status = 0;
6047 }
6048
6049 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6050 rpc_restart_call_prepare(task);
6051 return;
6052 }
6053
6054 if (task->tk_status == 0)
6055 nfs_post_op_update_inode_force_wcc(data->args.inode,
6056 data->res.fattr);
6057}
6058
6059static void nfs4_layoutcommit_release(void *calldata)
6060{
6061 struct nfs4_layoutcommit_data *data = calldata;
6062 struct pnfs_layout_segment *lseg, *tmp;
6063 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6064
6065 pnfs_cleanup_layoutcommit(data);
6066 /* Matched by references in pnfs_set_layoutcommit */
6067 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6068 list_del_init(&lseg->pls_lc_list);
6069 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6070 &lseg->pls_flags))
6071 put_lseg(lseg);
6072 }
6073
6074 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6075 smp_mb__after_clear_bit();
6076 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6077
6078 put_rpccred(data->cred);
6079 kfree(data);
6080}
6081
6082static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6083 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6084 .rpc_call_done = nfs4_layoutcommit_done,
6085 .rpc_release = nfs4_layoutcommit_release,
6086};
6087
6088int
6089nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6090{
6091 struct rpc_message msg = {
6092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6093 .rpc_argp = &data->args,
6094 .rpc_resp = &data->res,
6095 .rpc_cred = data->cred,
6096 };
6097 struct rpc_task_setup task_setup_data = {
6098 .task = &data->task,
6099 .rpc_client = NFS_CLIENT(data->args.inode),
6100 .rpc_message = &msg,
6101 .callback_ops = &nfs4_layoutcommit_ops,
6102 .callback_data = data,
6103 .flags = RPC_TASK_ASYNC,
6104 };
6105 struct rpc_task *task;
6106 int status = 0;
6107
6108 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6109 "lbw: %llu inode %lu\n",
6110 data->task.tk_pid, sync,
6111 data->args.lastbytewritten,
6112 data->args.inode->i_ino);
6113
6114 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6115 task = rpc_run_task(&task_setup_data);
6116 if (IS_ERR(task))
6117 return PTR_ERR(task);
6118 if (sync == false)
6119 goto out;
6120 status = nfs4_wait_for_completion_rpc_task(task);
6121 if (status != 0)
6122 goto out;
6123 status = task->tk_status;
6124out:
6125 dprintk("%s: status %d\n", __func__, status);
6126 rpc_put_task(task);
6127 return status;
6128}
6129
6130static int
6131_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6132 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6133{
6134 struct nfs41_secinfo_no_name_args args = {
6135 .style = SECINFO_STYLE_CURRENT_FH,
6136 };
6137 struct nfs4_secinfo_res res = {
6138 .flavors = flavors,
6139 };
6140 struct rpc_message msg = {
6141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6142 .rpc_argp = &args,
6143 .rpc_resp = &res,
6144 };
6145 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6146}
6147
6148static int
6149nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6150 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6151{
6152 struct nfs4_exception exception = { };
6153 int err;
6154 do {
6155 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6156 switch (err) {
6157 case 0:
6158 case -NFS4ERR_WRONGSEC:
6159 case -NFS4ERR_NOTSUPP:
6160 break;
6161 default:
6162 err = nfs4_handle_exception(server, err, &exception);
6163 }
6164 } while (exception.retry);
6165 return err;
6166}
6167
6168static int
6169nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6170 struct nfs_fsinfo *info)
6171{
6172 int err;
6173 struct page *page;
6174 rpc_authflavor_t flavor;
6175 struct nfs4_secinfo_flavors *flavors;
6176
6177 page = alloc_page(GFP_KERNEL);
6178 if (!page) {
6179 err = -ENOMEM;
6180 goto out;
6181 }
6182
6183 flavors = page_address(page);
6184 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6185
6186 /*
6187 * Fall back on "guess and check" method if
6188 * the server doesn't support SECINFO_NO_NAME
6189 */
6190 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6191 err = nfs4_find_root_sec(server, fhandle, info);
6192 goto out_freepage;
6193 }
6194 if (err)
6195 goto out_freepage;
6196
6197 flavor = nfs_find_best_sec(flavors);
6198 if (err == 0)
6199 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6200
6201out_freepage:
6202 put_page(page);
6203 if (err == -EACCES)
6204 return -EPERM;
6205out:
6206 return err;
6207}
6208
6209static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6210{
6211 int status;
6212 struct nfs41_test_stateid_args args = {
6213 .stateid = stateid,
6214 };
6215 struct nfs41_test_stateid_res res;
6216 struct rpc_message msg = {
6217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6218 .rpc_argp = &args,
6219 .rpc_resp = &res,
6220 };
6221
6222 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6223 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6224
6225 if (status == NFS_OK)
6226 return res.status;
6227 return status;
6228}
6229
6230static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6231{
6232 struct nfs4_exception exception = { };
6233 int err;
6234 do {
6235 err = nfs4_handle_exception(server,
6236 _nfs41_test_stateid(server, stateid),
6237 &exception);
6238 } while (exception.retry);
6239 return err;
6240}
6241
6242static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6243{
6244 struct nfs41_free_stateid_args args = {
6245 .stateid = stateid,
6246 };
6247 struct nfs41_free_stateid_res res;
6248 struct rpc_message msg = {
6249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6250 .rpc_argp = &args,
6251 .rpc_resp = &res,
6252 };
6253
6254 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6255 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6256}
6257
6258static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6259{
6260 struct nfs4_exception exception = { };
6261 int err;
6262 do {
6263 err = nfs4_handle_exception(server,
6264 _nfs4_free_stateid(server, stateid),
6265 &exception);
6266 } while (exception.retry);
6267 return err;
6268}
6269#endif /* CONFIG_NFS_V4_1 */
6270
6271struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6272 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6273 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6274 .recover_open = nfs4_open_reclaim,
6275 .recover_lock = nfs4_lock_reclaim,
6276 .establish_clid = nfs4_init_clientid,
6277 .get_clid_cred = nfs4_get_setclientid_cred,
6278};
6279
6280#if defined(CONFIG_NFS_V4_1)
6281struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6282 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6283 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6284 .recover_open = nfs4_open_reclaim,
6285 .recover_lock = nfs4_lock_reclaim,
6286 .establish_clid = nfs41_init_clientid,
6287 .get_clid_cred = nfs4_get_exchange_id_cred,
6288 .reclaim_complete = nfs41_proc_reclaim_complete,
6289};
6290#endif /* CONFIG_NFS_V4_1 */
6291
6292struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6293 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6294 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6295 .recover_open = nfs4_open_expired,
6296 .recover_lock = nfs4_lock_expired,
6297 .establish_clid = nfs4_init_clientid,
6298 .get_clid_cred = nfs4_get_setclientid_cred,
6299};
6300
6301#if defined(CONFIG_NFS_V4_1)
6302struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6303 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6304 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6305 .recover_open = nfs41_open_expired,
6306 .recover_lock = nfs41_lock_expired,
6307 .establish_clid = nfs41_init_clientid,
6308 .get_clid_cred = nfs4_get_exchange_id_cred,
6309};
6310#endif /* CONFIG_NFS_V4_1 */
6311
6312struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6313 .sched_state_renewal = nfs4_proc_async_renew,
6314 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6315 .renew_lease = nfs4_proc_renew,
6316};
6317
6318#if defined(CONFIG_NFS_V4_1)
6319struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6320 .sched_state_renewal = nfs41_proc_async_sequence,
6321 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6322 .renew_lease = nfs4_proc_sequence,
6323};
6324#endif
6325
6326static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6327 .minor_version = 0,
6328 .call_sync = _nfs4_call_sync,
6329 .validate_stateid = nfs4_validate_delegation_stateid,
6330 .find_root_sec = nfs4_find_root_sec,
6331 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6332 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6333 .state_renewal_ops = &nfs40_state_renewal_ops,
6334};
6335
6336#if defined(CONFIG_NFS_V4_1)
6337static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6338 .minor_version = 1,
6339 .call_sync = _nfs4_call_sync_session,
6340 .validate_stateid = nfs41_validate_delegation_stateid,
6341 .find_root_sec = nfs41_find_root_sec,
6342 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6343 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6344 .state_renewal_ops = &nfs41_state_renewal_ops,
6345};
6346#endif
6347
6348const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6349 [0] = &nfs_v4_0_minor_ops,
6350#if defined(CONFIG_NFS_V4_1)
6351 [1] = &nfs_v4_1_minor_ops,
6352#endif
6353};
6354
6355static const struct inode_operations nfs4_file_inode_operations = {
6356 .permission = nfs_permission,
6357 .getattr = nfs_getattr,
6358 .setattr = nfs_setattr,
6359 .getxattr = generic_getxattr,
6360 .setxattr = generic_setxattr,
6361 .listxattr = generic_listxattr,
6362 .removexattr = generic_removexattr,
6363};
6364
6365const struct nfs_rpc_ops nfs_v4_clientops = {
6366 .version = 4, /* protocol version */
6367 .dentry_ops = &nfs4_dentry_operations,
6368 .dir_inode_ops = &nfs4_dir_inode_operations,
6369 .file_inode_ops = &nfs4_file_inode_operations,
6370 .file_ops = &nfs4_file_operations,
6371 .getroot = nfs4_proc_get_root,
6372 .getattr = nfs4_proc_getattr,
6373 .setattr = nfs4_proc_setattr,
6374 .lookup = nfs4_proc_lookup,
6375 .access = nfs4_proc_access,
6376 .readlink = nfs4_proc_readlink,
6377 .create = nfs4_proc_create,
6378 .remove = nfs4_proc_remove,
6379 .unlink_setup = nfs4_proc_unlink_setup,
6380 .unlink_done = nfs4_proc_unlink_done,
6381 .rename = nfs4_proc_rename,
6382 .rename_setup = nfs4_proc_rename_setup,
6383 .rename_done = nfs4_proc_rename_done,
6384 .link = nfs4_proc_link,
6385 .symlink = nfs4_proc_symlink,
6386 .mkdir = nfs4_proc_mkdir,
6387 .rmdir = nfs4_proc_remove,
6388 .readdir = nfs4_proc_readdir,
6389 .mknod = nfs4_proc_mknod,
6390 .statfs = nfs4_proc_statfs,
6391 .fsinfo = nfs4_proc_fsinfo,
6392 .pathconf = nfs4_proc_pathconf,
6393 .set_capabilities = nfs4_server_capabilities,
6394 .decode_dirent = nfs4_decode_dirent,
6395 .read_setup = nfs4_proc_read_setup,
6396 .read_done = nfs4_read_done,
6397 .write_setup = nfs4_proc_write_setup,
6398 .write_done = nfs4_write_done,
6399 .commit_setup = nfs4_proc_commit_setup,
6400 .commit_done = nfs4_commit_done,
6401 .lock = nfs4_proc_lock,
6402 .clear_acl_cache = nfs4_zap_acl_attr,
6403 .close_context = nfs4_close_context,
6404 .open_context = nfs4_atomic_open,
6405 .init_client = nfs4_init_client,
6406 .secinfo = nfs4_proc_secinfo,
6407};
6408
6409static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6410 .prefix = XATTR_NAME_NFSV4_ACL,
6411 .list = nfs4_xattr_list_nfs4_acl,
6412 .get = nfs4_xattr_get_nfs4_acl,
6413 .set = nfs4_xattr_set_nfs4_acl,
6414};
6415
6416const struct xattr_handler *nfs4_xattr_handlers[] = {
6417 &nfs4_xattr_nfs4_acl_handler,
6418 NULL
6419};
6420
6421module_param(max_session_slots, ushort, 0644);
6422MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6423 "requests the client will negotiate");
6424
6425/*
6426 * Local variables:
6427 * c-basic-offset: 8
6428 * End:
6429 */
Linux 6.x block layer and io_uring tree(s)