4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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>
61 #include "delegation.h"
67 #define NFSDBG_FACILITY NFSDBG_PROC
69 #define NFS4_POLL_RETRY_MIN (HZ/10)
70 #define NFS4_POLL_RETRY_MAX (15*HZ)
72 #define NFS4_MAX_LOOP_ON_RECOVER (10)
75 static int _nfs4_proc_open(struct nfs4_opendata *data);
76 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
77 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
78 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
79 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
80 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
81 struct nfs_fattr *fattr, struct iattr *sattr,
82 struct nfs4_state *state);
83 #ifdef CONFIG_NFS_V4_1
84 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
85 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
87 /* Prevent leaks of NFSv4 errors into userland */
88 static int nfs4_map_errors(int err)
93 case -NFS4ERR_RESOURCE:
95 case -NFS4ERR_WRONGSEC:
97 case -NFS4ERR_BADOWNER:
98 case -NFS4ERR_BADNAME:
101 dprintk("%s could not handle NFSv4 error %d\n",
109 * This is our standard bitmap for GETATTR requests.
111 const u32 nfs4_fattr_bitmap[2] = {
113 | FATTR4_WORD0_CHANGE
116 | FATTR4_WORD0_FILEID,
118 | FATTR4_WORD1_NUMLINKS
120 | FATTR4_WORD1_OWNER_GROUP
121 | FATTR4_WORD1_RAWDEV
122 | FATTR4_WORD1_SPACE_USED
123 | FATTR4_WORD1_TIME_ACCESS
124 | FATTR4_WORD1_TIME_METADATA
125 | FATTR4_WORD1_TIME_MODIFY
128 const u32 nfs4_statfs_bitmap[2] = {
129 FATTR4_WORD0_FILES_AVAIL
130 | FATTR4_WORD0_FILES_FREE
131 | FATTR4_WORD0_FILES_TOTAL,
132 FATTR4_WORD1_SPACE_AVAIL
133 | FATTR4_WORD1_SPACE_FREE
134 | FATTR4_WORD1_SPACE_TOTAL
137 const u32 nfs4_pathconf_bitmap[2] = {
139 | FATTR4_WORD0_MAXNAME,
143 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
144 | FATTR4_WORD0_MAXREAD
145 | FATTR4_WORD0_MAXWRITE
146 | FATTR4_WORD0_LEASE_TIME,
147 FATTR4_WORD1_TIME_DELTA
148 | FATTR4_WORD1_FS_LAYOUT_TYPES,
149 FATTR4_WORD2_LAYOUT_BLKSIZE
152 const u32 nfs4_fs_locations_bitmap[2] = {
154 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID
158 | FATTR4_WORD0_FS_LOCATIONS,
160 | FATTR4_WORD1_NUMLINKS
162 | FATTR4_WORD1_OWNER_GROUP
163 | FATTR4_WORD1_RAWDEV
164 | FATTR4_WORD1_SPACE_USED
165 | FATTR4_WORD1_TIME_ACCESS
166 | FATTR4_WORD1_TIME_METADATA
167 | FATTR4_WORD1_TIME_MODIFY
168 | FATTR4_WORD1_MOUNTED_ON_FILEID
171 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
172 struct nfs4_readdir_arg *readdir)
176 BUG_ON(readdir->count < 80);
178 readdir->cookie = cookie;
179 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
184 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
189 * NFSv4 servers do not return entries for '.' and '..'
190 * Therefore, we fake these entries here. We let '.'
191 * have cookie 0 and '..' have cookie 1. Note that
192 * when talking to the server, we always send cookie 0
195 start = p = kmap_atomic(*readdir->pages, KM_USER0);
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_one; /* cookie, second word */
201 *p++ = xdr_one; /* entry len */
202 memcpy(p, ".\0\0\0", 4); /* entry */
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
210 *p++ = xdr_one; /* next */
211 *p++ = xdr_zero; /* cookie, first word */
212 *p++ = xdr_two; /* cookie, second word */
213 *p++ = xdr_two; /* entry len */
214 memcpy(p, "..\0\0", 4); /* entry */
216 *p++ = xdr_one; /* bitmap length */
217 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
218 *p++ = htonl(8); /* attribute buffer length */
219 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
221 readdir->pgbase = (char *)p - (char *)start;
222 readdir->count -= readdir->pgbase;
223 kunmap_atomic(start, KM_USER0);
226 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
232 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
233 nfs_wait_bit_killable, TASK_KILLABLE);
237 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
244 *timeout = NFS4_POLL_RETRY_MIN;
245 if (*timeout > NFS4_POLL_RETRY_MAX)
246 *timeout = NFS4_POLL_RETRY_MAX;
247 schedule_timeout_killable(*timeout);
248 if (fatal_signal_pending(current))
254 /* This is the error handling routine for processes that are allowed
257 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
259 struct nfs_client *clp = server->nfs_client;
260 struct nfs4_state *state = exception->state;
263 exception->retry = 0;
267 case -NFS4ERR_ADMIN_REVOKED:
268 case -NFS4ERR_BAD_STATEID:
269 case -NFS4ERR_OPENMODE:
272 nfs4_schedule_stateid_recovery(server, state);
273 goto wait_on_recovery;
274 case -NFS4ERR_EXPIRED:
276 nfs4_schedule_stateid_recovery(server, state);
277 case -NFS4ERR_STALE_STATEID:
278 case -NFS4ERR_STALE_CLIENTID:
279 nfs4_schedule_lease_recovery(clp);
280 goto wait_on_recovery;
281 #if defined(CONFIG_NFS_V4_1)
282 case -NFS4ERR_BADSESSION:
283 case -NFS4ERR_BADSLOT:
284 case -NFS4ERR_BAD_HIGH_SLOT:
285 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
286 case -NFS4ERR_DEADSESSION:
287 case -NFS4ERR_SEQ_FALSE_RETRY:
288 case -NFS4ERR_SEQ_MISORDERED:
289 dprintk("%s ERROR: %d Reset session\n", __func__,
291 nfs4_schedule_session_recovery(clp->cl_session);
292 exception->retry = 1;
294 #endif /* defined(CONFIG_NFS_V4_1) */
295 case -NFS4ERR_FILE_OPEN:
296 if (exception->timeout > HZ) {
297 /* We have retried a decent amount, time to
306 ret = nfs4_delay(server->client, &exception->timeout);
309 case -NFS4ERR_RETRY_UNCACHED_REP:
310 case -NFS4ERR_OLD_STATEID:
311 exception->retry = 1;
313 case -NFS4ERR_BADOWNER:
314 /* The following works around a Linux server bug! */
315 case -NFS4ERR_BADNAME:
316 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
317 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
318 exception->retry = 1;
319 printk(KERN_WARNING "NFS: v4 server %s "
320 "does not accept raw "
322 "Reenabling the idmapper.\n",
323 server->nfs_client->cl_hostname);
326 /* We failed to handle the error */
327 return nfs4_map_errors(ret);
329 ret = nfs4_wait_clnt_recover(clp);
331 exception->retry = 1;
336 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
338 spin_lock(&clp->cl_lock);
339 if (time_before(clp->cl_last_renewal,timestamp))
340 clp->cl_last_renewal = timestamp;
341 spin_unlock(&clp->cl_lock);
344 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
346 do_renew_lease(server->nfs_client, timestamp);
349 #if defined(CONFIG_NFS_V4_1)
352 * nfs4_free_slot - free a slot and efficiently update slot table.
354 * freeing a slot is trivially done by clearing its respective bit
356 * If the freed slotid equals highest_used_slotid we want to update it
357 * so that the server would be able to size down the slot table if needed,
358 * otherwise we know that the highest_used_slotid is still in use.
359 * When updating highest_used_slotid there may be "holes" in the bitmap
360 * so we need to scan down from highest_used_slotid to 0 looking for the now
361 * highest slotid in use.
362 * If none found, highest_used_slotid is set to -1.
364 * Must be called while holding tbl->slot_tbl_lock
367 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
369 int slotid = free_slotid;
371 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
372 /* clear used bit in bitmap */
373 __clear_bit(slotid, tbl->used_slots);
375 /* update highest_used_slotid when it is freed */
376 if (slotid == tbl->highest_used_slotid) {
377 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
378 if (slotid < tbl->max_slots)
379 tbl->highest_used_slotid = slotid;
381 tbl->highest_used_slotid = -1;
383 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
384 free_slotid, tbl->highest_used_slotid);
388 * Signal state manager thread if session fore channel is drained
390 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
392 struct rpc_task *task;
394 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
395 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
397 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
401 if (ses->fc_slot_table.highest_used_slotid != -1)
404 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
405 complete(&ses->fc_slot_table.complete);
409 * Signal state manager thread if session back channel is drained
411 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
413 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
414 ses->bc_slot_table.highest_used_slotid != -1)
416 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
417 complete(&ses->bc_slot_table.complete);
420 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
422 struct nfs4_slot_table *tbl;
424 tbl = &res->sr_session->fc_slot_table;
426 /* just wake up the next guy waiting since
427 * we may have not consumed a slot after all */
428 dprintk("%s: No slot\n", __func__);
432 spin_lock(&tbl->slot_tbl_lock);
433 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
434 nfs4_check_drain_fc_complete(res->sr_session);
435 spin_unlock(&tbl->slot_tbl_lock);
439 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
441 unsigned long timestamp;
442 struct nfs_client *clp;
445 * sr_status remains 1 if an RPC level error occurred. The server
446 * may or may not have processed the sequence operation..
447 * Proceed as if the server received and processed the sequence
450 if (res->sr_status == 1)
451 res->sr_status = NFS_OK;
453 /* don't increment the sequence number if the task wasn't sent */
454 if (!RPC_WAS_SENT(task))
457 /* Check the SEQUENCE operation status */
458 switch (res->sr_status) {
460 /* Update the slot's sequence and clientid lease timer */
461 ++res->sr_slot->seq_nr;
462 timestamp = res->sr_renewal_time;
463 clp = res->sr_session->clp;
464 do_renew_lease(clp, timestamp);
465 /* Check sequence flags */
466 if (res->sr_status_flags != 0)
467 nfs4_schedule_lease_recovery(clp);
470 /* The server detected a resend of the RPC call and
471 * returned NFS4ERR_DELAY as per Section 2.10.6.2
474 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
476 res->sr_slot - res->sr_session->fc_slot_table.slots,
477 res->sr_slot->seq_nr);
480 /* Just update the slot sequence no. */
481 ++res->sr_slot->seq_nr;
484 /* The session may be reset by one of the error handlers. */
485 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
486 nfs41_sequence_free_slot(res);
489 if (!rpc_restart_call(task))
491 rpc_delay(task, NFS4_POLL_RETRY_MAX);
495 static int nfs4_sequence_done(struct rpc_task *task,
496 struct nfs4_sequence_res *res)
498 if (res->sr_session == NULL)
500 return nfs41_sequence_done(task, res);
504 * nfs4_find_slot - efficiently look for a free slot
506 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
507 * If found, we mark the slot as used, update the highest_used_slotid,
508 * and respectively set up the sequence operation args.
509 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
511 * Note: must be called with under the slot_tbl_lock.
514 nfs4_find_slot(struct nfs4_slot_table *tbl)
517 u8 ret_id = NFS4_MAX_SLOT_TABLE;
518 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
520 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
521 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
523 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
524 if (slotid >= tbl->max_slots)
526 __set_bit(slotid, tbl->used_slots);
527 if (slotid > tbl->highest_used_slotid)
528 tbl->highest_used_slotid = slotid;
531 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
532 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
536 int nfs41_setup_sequence(struct nfs4_session *session,
537 struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res,
540 struct rpc_task *task)
542 struct nfs4_slot *slot;
543 struct nfs4_slot_table *tbl;
546 dprintk("--> %s\n", __func__);
547 /* slot already allocated? */
548 if (res->sr_slot != NULL)
551 tbl = &session->fc_slot_table;
553 spin_lock(&tbl->slot_tbl_lock);
554 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
555 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
556 /* The state manager will wait until the slot table is empty */
557 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
558 spin_unlock(&tbl->slot_tbl_lock);
559 dprintk("%s session is draining\n", __func__);
563 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
564 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
565 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
566 spin_unlock(&tbl->slot_tbl_lock);
567 dprintk("%s enforce FIFO order\n", __func__);
571 slotid = nfs4_find_slot(tbl);
572 if (slotid == NFS4_MAX_SLOT_TABLE) {
573 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
574 spin_unlock(&tbl->slot_tbl_lock);
575 dprintk("<-- %s: no free slots\n", __func__);
578 spin_unlock(&tbl->slot_tbl_lock);
580 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
581 slot = tbl->slots + slotid;
582 args->sa_session = session;
583 args->sa_slotid = slotid;
584 args->sa_cache_this = cache_reply;
586 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
588 res->sr_session = session;
590 res->sr_renewal_time = jiffies;
591 res->sr_status_flags = 0;
593 * sr_status is only set in decode_sequence, and so will remain
594 * set to 1 if an rpc level failure occurs.
599 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
601 int nfs4_setup_sequence(const struct nfs_server *server,
602 struct nfs4_sequence_args *args,
603 struct nfs4_sequence_res *res,
605 struct rpc_task *task)
607 struct nfs4_session *session = nfs4_get_session(server);
610 if (session == NULL) {
611 args->sa_session = NULL;
612 res->sr_session = NULL;
616 dprintk("--> %s clp %p session %p sr_slot %td\n",
617 __func__, session->clp, session, res->sr_slot ?
618 res->sr_slot - session->fc_slot_table.slots : -1);
620 ret = nfs41_setup_sequence(session, args, res, cache_reply,
623 dprintk("<-- %s status=%d\n", __func__, ret);
627 struct nfs41_call_sync_data {
628 const struct nfs_server *seq_server;
629 struct nfs4_sequence_args *seq_args;
630 struct nfs4_sequence_res *seq_res;
634 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
636 struct nfs41_call_sync_data *data = calldata;
638 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
641 data->seq_res, data->cache_reply, task))
643 rpc_call_start(task);
646 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
648 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
649 nfs41_call_sync_prepare(task, calldata);
652 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
654 struct nfs41_call_sync_data *data = calldata;
656 nfs41_sequence_done(task, data->seq_res);
659 struct rpc_call_ops nfs41_call_sync_ops = {
660 .rpc_call_prepare = nfs41_call_sync_prepare,
661 .rpc_call_done = nfs41_call_sync_done,
664 struct rpc_call_ops nfs41_call_priv_sync_ops = {
665 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
666 .rpc_call_done = nfs41_call_sync_done,
669 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
670 struct nfs_server *server,
671 struct rpc_message *msg,
672 struct nfs4_sequence_args *args,
673 struct nfs4_sequence_res *res,
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
680 .seq_server = server,
683 .cache_reply = cache_reply,
685 struct rpc_task_setup task_setup = {
688 .callback_ops = &nfs41_call_sync_ops,
689 .callback_data = &data
694 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
695 task = rpc_run_task(&task_setup);
699 ret = task->tk_status;
705 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
706 struct nfs_server *server,
707 struct rpc_message *msg,
708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
712 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
716 static int nfs4_sequence_done(struct rpc_task *task,
717 struct nfs4_sequence_res *res)
721 #endif /* CONFIG_NFS_V4_1 */
723 int _nfs4_call_sync(struct rpc_clnt *clnt,
724 struct nfs_server *server,
725 struct rpc_message *msg,
726 struct nfs4_sequence_args *args,
727 struct nfs4_sequence_res *res,
730 args->sa_session = res->sr_session = NULL;
731 return rpc_call_sync(clnt, msg, 0);
735 int nfs4_call_sync(struct rpc_clnt *clnt,
736 struct nfs_server *server,
737 struct rpc_message *msg,
738 struct nfs4_sequence_args *args,
739 struct nfs4_sequence_res *res,
742 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
743 args, res, cache_reply);
746 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
748 struct nfs_inode *nfsi = NFS_I(dir);
750 spin_lock(&dir->i_lock);
751 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
752 if (!cinfo->atomic || cinfo->before != dir->i_version)
753 nfs_force_lookup_revalidate(dir);
754 dir->i_version = cinfo->after;
755 spin_unlock(&dir->i_lock);
758 struct nfs4_opendata {
760 struct nfs_openargs o_arg;
761 struct nfs_openres o_res;
762 struct nfs_open_confirmargs c_arg;
763 struct nfs_open_confirmres c_res;
764 struct nfs4_string owner_name;
765 struct nfs4_string group_name;
766 struct nfs_fattr f_attr;
767 struct nfs_fattr dir_attr;
769 struct dentry *dentry;
770 struct nfs4_state_owner *owner;
771 struct nfs4_state *state;
773 unsigned long timestamp;
774 unsigned int rpc_done : 1;
780 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
782 p->o_res.f_attr = &p->f_attr;
783 p->o_res.dir_attr = &p->dir_attr;
784 p->o_res.seqid = p->o_arg.seqid;
785 p->c_res.seqid = p->c_arg.seqid;
786 p->o_res.server = p->o_arg.server;
787 nfs_fattr_init(&p->f_attr);
788 nfs_fattr_init(&p->dir_attr);
789 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
792 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
793 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
794 const struct iattr *attrs,
797 struct dentry *parent = dget_parent(dentry);
798 struct inode *dir = parent->d_inode;
799 struct nfs_server *server = NFS_SERVER(dir);
800 struct nfs4_opendata *p;
802 p = kzalloc(sizeof(*p), gfp_mask);
805 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
806 if (p->o_arg.seqid == NULL)
808 nfs_sb_active(dentry->d_sb);
809 p->dentry = dget(dentry);
812 atomic_inc(&sp->so_count);
813 p->o_arg.fh = NFS_FH(dir);
814 p->o_arg.open_flags = flags;
815 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
816 p->o_arg.clientid = server->nfs_client->cl_clientid;
817 p->o_arg.id = sp->so_owner_id.id;
818 p->o_arg.name = &dentry->d_name;
819 p->o_arg.server = server;
820 p->o_arg.bitmask = server->attr_bitmask;
821 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
822 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
823 if (flags & O_CREAT) {
826 p->o_arg.u.attrs = &p->attrs;
827 memcpy(&p->attrs, attrs, sizeof(p->attrs));
828 s = (u32 *) p->o_arg.u.verifier.data;
832 p->c_arg.fh = &p->o_res.fh;
833 p->c_arg.stateid = &p->o_res.stateid;
834 p->c_arg.seqid = p->o_arg.seqid;
835 nfs4_init_opendata_res(p);
845 static void nfs4_opendata_free(struct kref *kref)
847 struct nfs4_opendata *p = container_of(kref,
848 struct nfs4_opendata, kref);
849 struct super_block *sb = p->dentry->d_sb;
851 nfs_free_seqid(p->o_arg.seqid);
852 if (p->state != NULL)
853 nfs4_put_open_state(p->state);
854 nfs4_put_state_owner(p->owner);
858 nfs_fattr_free_names(&p->f_attr);
862 static void nfs4_opendata_put(struct nfs4_opendata *p)
865 kref_put(&p->kref, nfs4_opendata_free);
868 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
872 ret = rpc_wait_for_completion_task(task);
876 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
880 if (open_mode & O_EXCL)
882 switch (mode & (FMODE_READ|FMODE_WRITE)) {
884 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
885 && state->n_rdonly != 0;
888 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
889 && state->n_wronly != 0;
891 case FMODE_READ|FMODE_WRITE:
892 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
893 && state->n_rdwr != 0;
899 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
901 if (delegation == NULL)
903 if ((delegation->type & fmode) != fmode)
905 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
907 nfs_mark_delegation_referenced(delegation);
911 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
920 case FMODE_READ|FMODE_WRITE:
923 nfs4_state_set_mode_locked(state, state->state | fmode);
926 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
928 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
929 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
930 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
933 set_bit(NFS_O_RDONLY_STATE, &state->flags);
936 set_bit(NFS_O_WRONLY_STATE, &state->flags);
938 case FMODE_READ|FMODE_WRITE:
939 set_bit(NFS_O_RDWR_STATE, &state->flags);
943 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
945 write_seqlock(&state->seqlock);
946 nfs_set_open_stateid_locked(state, stateid, fmode);
947 write_sequnlock(&state->seqlock);
950 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
953 * Protect the call to nfs4_state_set_mode_locked and
954 * serialise the stateid update
956 write_seqlock(&state->seqlock);
957 if (deleg_stateid != NULL) {
958 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
959 set_bit(NFS_DELEGATED_STATE, &state->flags);
961 if (open_stateid != NULL)
962 nfs_set_open_stateid_locked(state, open_stateid, fmode);
963 write_sequnlock(&state->seqlock);
964 spin_lock(&state->owner->so_lock);
965 update_open_stateflags(state, fmode);
966 spin_unlock(&state->owner->so_lock);
969 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
971 struct nfs_inode *nfsi = NFS_I(state->inode);
972 struct nfs_delegation *deleg_cur;
975 fmode &= (FMODE_READ|FMODE_WRITE);
978 deleg_cur = rcu_dereference(nfsi->delegation);
979 if (deleg_cur == NULL)
982 spin_lock(&deleg_cur->lock);
983 if (nfsi->delegation != deleg_cur ||
984 (deleg_cur->type & fmode) != fmode)
985 goto no_delegation_unlock;
987 if (delegation == NULL)
988 delegation = &deleg_cur->stateid;
989 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
990 goto no_delegation_unlock;
992 nfs_mark_delegation_referenced(deleg_cur);
993 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
995 no_delegation_unlock:
996 spin_unlock(&deleg_cur->lock);
1000 if (!ret && open_stateid != NULL) {
1001 __update_open_stateid(state, open_stateid, NULL, fmode);
1009 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1011 struct nfs_delegation *delegation;
1014 delegation = rcu_dereference(NFS_I(inode)->delegation);
1015 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1020 nfs_inode_return_delegation(inode);
1023 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1025 struct nfs4_state *state = opendata->state;
1026 struct nfs_inode *nfsi = NFS_I(state->inode);
1027 struct nfs_delegation *delegation;
1028 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1029 fmode_t fmode = opendata->o_arg.fmode;
1030 nfs4_stateid stateid;
1034 if (can_open_cached(state, fmode, open_mode)) {
1035 spin_lock(&state->owner->so_lock);
1036 if (can_open_cached(state, fmode, open_mode)) {
1037 update_open_stateflags(state, fmode);
1038 spin_unlock(&state->owner->so_lock);
1039 goto out_return_state;
1041 spin_unlock(&state->owner->so_lock);
1044 delegation = rcu_dereference(nfsi->delegation);
1045 if (!can_open_delegated(delegation, fmode)) {
1049 /* Save the delegation */
1050 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1052 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1057 /* Try to update the stateid using the delegation */
1058 if (update_open_stateid(state, NULL, &stateid, fmode))
1059 goto out_return_state;
1062 return ERR_PTR(ret);
1064 atomic_inc(&state->count);
1068 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1070 struct inode *inode;
1071 struct nfs4_state *state = NULL;
1072 struct nfs_delegation *delegation;
1075 if (!data->rpc_done) {
1076 state = nfs4_try_open_cached(data);
1081 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1083 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1084 ret = PTR_ERR(inode);
1088 state = nfs4_get_open_state(inode, data->owner);
1091 if (data->o_res.delegation_type != 0) {
1092 int delegation_flags = 0;
1095 delegation = rcu_dereference(NFS_I(inode)->delegation);
1097 delegation_flags = delegation->flags;
1099 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1100 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1101 "returning a delegation for "
1102 "OPEN(CLAIM_DELEGATE_CUR)\n",
1103 NFS_CLIENT(inode)->cl_server);
1104 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1105 nfs_inode_set_delegation(state->inode,
1106 data->owner->so_cred,
1109 nfs_inode_reclaim_delegation(state->inode,
1110 data->owner->so_cred,
1114 update_open_stateid(state, &data->o_res.stateid, NULL,
1122 return ERR_PTR(ret);
1125 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1127 struct nfs_inode *nfsi = NFS_I(state->inode);
1128 struct nfs_open_context *ctx;
1130 spin_lock(&state->inode->i_lock);
1131 list_for_each_entry(ctx, &nfsi->open_files, list) {
1132 if (ctx->state != state)
1134 get_nfs_open_context(ctx);
1135 spin_unlock(&state->inode->i_lock);
1138 spin_unlock(&state->inode->i_lock);
1139 return ERR_PTR(-ENOENT);
1142 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1144 struct nfs4_opendata *opendata;
1146 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1147 if (opendata == NULL)
1148 return ERR_PTR(-ENOMEM);
1149 opendata->state = state;
1150 atomic_inc(&state->count);
1154 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1156 struct nfs4_state *newstate;
1159 opendata->o_arg.open_flags = 0;
1160 opendata->o_arg.fmode = fmode;
1161 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1162 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1163 nfs4_init_opendata_res(opendata);
1164 ret = _nfs4_recover_proc_open(opendata);
1167 newstate = nfs4_opendata_to_nfs4_state(opendata);
1168 if (IS_ERR(newstate))
1169 return PTR_ERR(newstate);
1170 nfs4_close_state(newstate, fmode);
1175 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1177 struct nfs4_state *newstate;
1180 /* memory barrier prior to reading state->n_* */
1181 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1183 if (state->n_rdwr != 0) {
1184 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1185 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1188 if (newstate != state)
1191 if (state->n_wronly != 0) {
1192 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1193 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1196 if (newstate != state)
1199 if (state->n_rdonly != 0) {
1200 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1201 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1204 if (newstate != state)
1208 * We may have performed cached opens for all three recoveries.
1209 * Check if we need to update the current stateid.
1211 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1212 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1213 write_seqlock(&state->seqlock);
1214 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1215 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1216 write_sequnlock(&state->seqlock);
1223 * reclaim state on the server after a reboot.
1225 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1227 struct nfs_delegation *delegation;
1228 struct nfs4_opendata *opendata;
1229 fmode_t delegation_type = 0;
1232 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1233 if (IS_ERR(opendata))
1234 return PTR_ERR(opendata);
1235 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1236 opendata->o_arg.fh = NFS_FH(state->inode);
1238 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1239 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1240 delegation_type = delegation->type;
1242 opendata->o_arg.u.delegation_type = delegation_type;
1243 status = nfs4_open_recover(opendata, state);
1244 nfs4_opendata_put(opendata);
1248 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1250 struct nfs_server *server = NFS_SERVER(state->inode);
1251 struct nfs4_exception exception = { };
1254 err = _nfs4_do_open_reclaim(ctx, state);
1255 if (err != -NFS4ERR_DELAY)
1257 nfs4_handle_exception(server, err, &exception);
1258 } while (exception.retry);
1262 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1264 struct nfs_open_context *ctx;
1267 ctx = nfs4_state_find_open_context(state);
1269 return PTR_ERR(ctx);
1270 ret = nfs4_do_open_reclaim(ctx, state);
1271 put_nfs_open_context(ctx);
1275 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1277 struct nfs4_opendata *opendata;
1280 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1281 if (IS_ERR(opendata))
1282 return PTR_ERR(opendata);
1283 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1284 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1285 sizeof(opendata->o_arg.u.delegation.data));
1286 ret = nfs4_open_recover(opendata, state);
1287 nfs4_opendata_put(opendata);
1291 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1293 struct nfs4_exception exception = { };
1294 struct nfs_server *server = NFS_SERVER(state->inode);
1297 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1303 case -NFS4ERR_BADSESSION:
1304 case -NFS4ERR_BADSLOT:
1305 case -NFS4ERR_BAD_HIGH_SLOT:
1306 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1307 case -NFS4ERR_DEADSESSION:
1308 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1310 case -NFS4ERR_STALE_CLIENTID:
1311 case -NFS4ERR_STALE_STATEID:
1312 case -NFS4ERR_EXPIRED:
1313 /* Don't recall a delegation if it was lost */
1314 nfs4_schedule_lease_recovery(server->nfs_client);
1318 * The show must go on: exit, but mark the
1319 * stateid as needing recovery.
1321 case -NFS4ERR_ADMIN_REVOKED:
1322 case -NFS4ERR_BAD_STATEID:
1323 nfs4_schedule_stateid_recovery(server, state);
1326 * User RPCSEC_GSS context has expired.
1327 * We cannot recover this stateid now, so
1328 * skip it and allow recovery thread to
1335 err = nfs4_handle_exception(server, err, &exception);
1336 } while (exception.retry);
1341 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1343 struct nfs4_opendata *data = calldata;
1345 data->rpc_status = task->tk_status;
1346 if (data->rpc_status == 0) {
1347 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1348 sizeof(data->o_res.stateid.data));
1349 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1350 renew_lease(data->o_res.server, data->timestamp);
1355 static void nfs4_open_confirm_release(void *calldata)
1357 struct nfs4_opendata *data = calldata;
1358 struct nfs4_state *state = NULL;
1360 /* If this request hasn't been cancelled, do nothing */
1361 if (data->cancelled == 0)
1363 /* In case of error, no cleanup! */
1364 if (!data->rpc_done)
1366 state = nfs4_opendata_to_nfs4_state(data);
1368 nfs4_close_state(state, data->o_arg.fmode);
1370 nfs4_opendata_put(data);
1373 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1374 .rpc_call_done = nfs4_open_confirm_done,
1375 .rpc_release = nfs4_open_confirm_release,
1379 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1381 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1383 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1384 struct rpc_task *task;
1385 struct rpc_message msg = {
1386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1387 .rpc_argp = &data->c_arg,
1388 .rpc_resp = &data->c_res,
1389 .rpc_cred = data->owner->so_cred,
1391 struct rpc_task_setup task_setup_data = {
1392 .rpc_client = server->client,
1393 .rpc_message = &msg,
1394 .callback_ops = &nfs4_open_confirm_ops,
1395 .callback_data = data,
1396 .workqueue = nfsiod_workqueue,
1397 .flags = RPC_TASK_ASYNC,
1401 kref_get(&data->kref);
1403 data->rpc_status = 0;
1404 data->timestamp = jiffies;
1405 task = rpc_run_task(&task_setup_data);
1407 return PTR_ERR(task);
1408 status = nfs4_wait_for_completion_rpc_task(task);
1410 data->cancelled = 1;
1413 status = data->rpc_status;
1418 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1420 struct nfs4_opendata *data = calldata;
1421 struct nfs4_state_owner *sp = data->owner;
1423 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1426 * Check if we still need to send an OPEN call, or if we can use
1427 * a delegation instead.
1429 if (data->state != NULL) {
1430 struct nfs_delegation *delegation;
1432 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1435 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1436 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1437 can_open_delegated(delegation, data->o_arg.fmode))
1438 goto unlock_no_action;
1441 /* Update sequence id. */
1442 data->o_arg.id = sp->so_owner_id.id;
1443 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1444 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1445 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1446 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1448 data->timestamp = jiffies;
1449 if (nfs4_setup_sequence(data->o_arg.server,
1450 &data->o_arg.seq_args,
1451 &data->o_res.seq_res, 1, task))
1453 rpc_call_start(task);
1458 task->tk_action = NULL;
1462 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1464 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1465 nfs4_open_prepare(task, calldata);
1468 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1470 struct nfs4_opendata *data = calldata;
1472 data->rpc_status = task->tk_status;
1474 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1477 if (task->tk_status == 0) {
1478 switch (data->o_res.f_attr->mode & S_IFMT) {
1482 data->rpc_status = -ELOOP;
1485 data->rpc_status = -EISDIR;
1488 data->rpc_status = -ENOTDIR;
1490 renew_lease(data->o_res.server, data->timestamp);
1491 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1492 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1497 static void nfs4_open_release(void *calldata)
1499 struct nfs4_opendata *data = calldata;
1500 struct nfs4_state *state = NULL;
1502 /* If this request hasn't been cancelled, do nothing */
1503 if (data->cancelled == 0)
1505 /* In case of error, no cleanup! */
1506 if (data->rpc_status != 0 || !data->rpc_done)
1508 /* In case we need an open_confirm, no cleanup! */
1509 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1511 state = nfs4_opendata_to_nfs4_state(data);
1513 nfs4_close_state(state, data->o_arg.fmode);
1515 nfs4_opendata_put(data);
1518 static const struct rpc_call_ops nfs4_open_ops = {
1519 .rpc_call_prepare = nfs4_open_prepare,
1520 .rpc_call_done = nfs4_open_done,
1521 .rpc_release = nfs4_open_release,
1524 static const struct rpc_call_ops nfs4_recover_open_ops = {
1525 .rpc_call_prepare = nfs4_recover_open_prepare,
1526 .rpc_call_done = nfs4_open_done,
1527 .rpc_release = nfs4_open_release,
1530 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1532 struct inode *dir = data->dir->d_inode;
1533 struct nfs_server *server = NFS_SERVER(dir);
1534 struct nfs_openargs *o_arg = &data->o_arg;
1535 struct nfs_openres *o_res = &data->o_res;
1536 struct rpc_task *task;
1537 struct rpc_message msg = {
1538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1541 .rpc_cred = data->owner->so_cred,
1543 struct rpc_task_setup task_setup_data = {
1544 .rpc_client = server->client,
1545 .rpc_message = &msg,
1546 .callback_ops = &nfs4_open_ops,
1547 .callback_data = data,
1548 .workqueue = nfsiod_workqueue,
1549 .flags = RPC_TASK_ASYNC,
1553 kref_get(&data->kref);
1555 data->rpc_status = 0;
1556 data->cancelled = 0;
1558 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1559 task = rpc_run_task(&task_setup_data);
1561 return PTR_ERR(task);
1562 status = nfs4_wait_for_completion_rpc_task(task);
1564 data->cancelled = 1;
1567 status = data->rpc_status;
1573 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1575 struct inode *dir = data->dir->d_inode;
1576 struct nfs_openres *o_res = &data->o_res;
1579 status = nfs4_run_open_task(data, 1);
1580 if (status != 0 || !data->rpc_done)
1583 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1585 nfs_refresh_inode(dir, o_res->dir_attr);
1587 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1588 status = _nfs4_proc_open_confirm(data);
1597 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1599 static int _nfs4_proc_open(struct nfs4_opendata *data)
1601 struct inode *dir = data->dir->d_inode;
1602 struct nfs_server *server = NFS_SERVER(dir);
1603 struct nfs_openargs *o_arg = &data->o_arg;
1604 struct nfs_openres *o_res = &data->o_res;
1607 status = nfs4_run_open_task(data, 0);
1608 if (!data->rpc_done)
1611 if (status == -NFS4ERR_BADNAME &&
1612 !(o_arg->open_flags & O_CREAT))
1617 nfs_fattr_map_and_free_names(server, &data->f_attr);
1619 if (o_arg->open_flags & O_CREAT) {
1620 update_changeattr(dir, &o_res->cinfo);
1621 nfs_post_op_update_inode(dir, o_res->dir_attr);
1623 nfs_refresh_inode(dir, o_res->dir_attr);
1624 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1625 server->caps &= ~NFS_CAP_POSIX_LOCK;
1626 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1627 status = _nfs4_proc_open_confirm(data);
1631 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1632 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1636 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1641 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1642 ret = nfs4_wait_clnt_recover(clp);
1645 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1646 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1648 nfs4_schedule_state_manager(clp);
1654 static int nfs4_recover_expired_lease(struct nfs_server *server)
1656 return nfs4_client_recover_expired_lease(server->nfs_client);
1661 * reclaim state on the server after a network partition.
1662 * Assumes caller holds the appropriate lock
1664 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1666 struct nfs4_opendata *opendata;
1669 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1670 if (IS_ERR(opendata))
1671 return PTR_ERR(opendata);
1672 ret = nfs4_open_recover(opendata, state);
1674 d_drop(ctx->dentry);
1675 nfs4_opendata_put(opendata);
1679 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1681 struct nfs_server *server = NFS_SERVER(state->inode);
1682 struct nfs4_exception exception = { };
1686 err = _nfs4_open_expired(ctx, state);
1690 case -NFS4ERR_GRACE:
1691 case -NFS4ERR_DELAY:
1692 nfs4_handle_exception(server, err, &exception);
1695 } while (exception.retry);
1700 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1702 struct nfs_open_context *ctx;
1705 ctx = nfs4_state_find_open_context(state);
1707 return PTR_ERR(ctx);
1708 ret = nfs4_do_open_expired(ctx, state);
1709 put_nfs_open_context(ctx);
1713 #if defined(CONFIG_NFS_V4_1)
1714 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1717 struct nfs_server *server = NFS_SERVER(state->inode);
1719 status = nfs41_test_stateid(server, state);
1720 if (status == NFS_OK)
1722 nfs41_free_stateid(server, state);
1723 return nfs4_open_expired(sp, state);
1728 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1729 * fields corresponding to attributes that were used to store the verifier.
1730 * Make sure we clobber those fields in the later setattr call
1732 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1734 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1735 !(sattr->ia_valid & ATTR_ATIME_SET))
1736 sattr->ia_valid |= ATTR_ATIME;
1738 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1739 !(sattr->ia_valid & ATTR_MTIME_SET))
1740 sattr->ia_valid |= ATTR_MTIME;
1744 * Returns a referenced nfs4_state
1746 static 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)
1748 struct nfs4_state_owner *sp;
1749 struct nfs4_state *state = NULL;
1750 struct nfs_server *server = NFS_SERVER(dir);
1751 struct nfs4_opendata *opendata;
1754 /* Protect against reboot recovery conflicts */
1756 if (!(sp = nfs4_get_state_owner(server, cred))) {
1757 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1760 status = nfs4_recover_expired_lease(server);
1762 goto err_put_state_owner;
1763 if (dentry->d_inode != NULL)
1764 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1766 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1767 if (opendata == NULL)
1768 goto err_put_state_owner;
1770 if (dentry->d_inode != NULL)
1771 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1773 status = _nfs4_proc_open(opendata);
1775 goto err_opendata_put;
1777 state = nfs4_opendata_to_nfs4_state(opendata);
1778 status = PTR_ERR(state);
1780 goto err_opendata_put;
1781 if (server->caps & NFS_CAP_POSIX_LOCK)
1782 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1784 if (opendata->o_arg.open_flags & O_EXCL) {
1785 nfs4_exclusive_attrset(opendata, sattr);
1787 nfs_fattr_init(opendata->o_res.f_attr);
1788 status = nfs4_do_setattr(state->inode, cred,
1789 opendata->o_res.f_attr, sattr,
1792 nfs_setattr_update_inode(state->inode, sattr);
1793 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1795 nfs4_opendata_put(opendata);
1796 nfs4_put_state_owner(sp);
1800 nfs4_opendata_put(opendata);
1801 err_put_state_owner:
1802 nfs4_put_state_owner(sp);
1809 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1811 struct nfs4_exception exception = { };
1812 struct nfs4_state *res;
1816 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1819 /* NOTE: BAD_SEQID means the server and client disagree about the
1820 * book-keeping w.r.t. state-changing operations
1821 * (OPEN/CLOSE/LOCK/LOCKU...)
1822 * It is actually a sign of a bug on the client or on the server.
1824 * If we receive a BAD_SEQID error in the particular case of
1825 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1826 * have unhashed the old state_owner for us, and that we can
1827 * therefore safely retry using a new one. We should still warn
1828 * the user though...
1830 if (status == -NFS4ERR_BAD_SEQID) {
1831 printk(KERN_WARNING "NFS: v4 server %s "
1832 " returned a bad sequence-id error!\n",
1833 NFS_SERVER(dir)->nfs_client->cl_hostname);
1834 exception.retry = 1;
1838 * BAD_STATEID on OPEN means that the server cancelled our
1839 * state before it received the OPEN_CONFIRM.
1840 * Recover by retrying the request as per the discussion
1841 * on Page 181 of RFC3530.
1843 if (status == -NFS4ERR_BAD_STATEID) {
1844 exception.retry = 1;
1847 if (status == -EAGAIN) {
1848 /* We must have found a delegation */
1849 exception.retry = 1;
1852 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1853 status, &exception));
1854 } while (exception.retry);
1858 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1859 struct nfs_fattr *fattr, struct iattr *sattr,
1860 struct nfs4_state *state)
1862 struct nfs_server *server = NFS_SERVER(inode);
1863 struct nfs_setattrargs arg = {
1864 .fh = NFS_FH(inode),
1867 .bitmask = server->attr_bitmask,
1869 struct nfs_setattrres res = {
1873 struct rpc_message msg = {
1874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1879 unsigned long timestamp = jiffies;
1882 nfs_fattr_init(fattr);
1884 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1885 /* Use that stateid */
1886 } else if (state != NULL) {
1887 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1889 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1891 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1892 if (status == 0 && state != NULL)
1893 renew_lease(server, timestamp);
1897 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1898 struct nfs_fattr *fattr, struct iattr *sattr,
1899 struct nfs4_state *state)
1901 struct nfs_server *server = NFS_SERVER(inode);
1902 struct nfs4_exception exception = { };
1905 err = nfs4_handle_exception(server,
1906 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1908 } while (exception.retry);
1912 struct nfs4_closedata {
1913 struct inode *inode;
1914 struct nfs4_state *state;
1915 struct nfs_closeargs arg;
1916 struct nfs_closeres res;
1917 struct nfs_fattr fattr;
1918 unsigned long timestamp;
1923 static void nfs4_free_closedata(void *data)
1925 struct nfs4_closedata *calldata = data;
1926 struct nfs4_state_owner *sp = calldata->state->owner;
1927 struct super_block *sb = calldata->state->inode->i_sb;
1930 pnfs_roc_release(calldata->state->inode);
1931 nfs4_put_open_state(calldata->state);
1932 nfs_free_seqid(calldata->arg.seqid);
1933 nfs4_put_state_owner(sp);
1934 nfs_sb_deactive(sb);
1938 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1941 spin_lock(&state->owner->so_lock);
1942 if (!(fmode & FMODE_READ))
1943 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1944 if (!(fmode & FMODE_WRITE))
1945 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1946 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1947 spin_unlock(&state->owner->so_lock);
1950 static void nfs4_close_done(struct rpc_task *task, void *data)
1952 struct nfs4_closedata *calldata = data;
1953 struct nfs4_state *state = calldata->state;
1954 struct nfs_server *server = NFS_SERVER(calldata->inode);
1956 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1958 /* hmm. we are done with the inode, and in the process of freeing
1959 * the state_owner. we keep this around to process errors
1961 switch (task->tk_status) {
1964 pnfs_roc_set_barrier(state->inode,
1965 calldata->roc_barrier);
1966 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1967 renew_lease(server, calldata->timestamp);
1968 nfs4_close_clear_stateid_flags(state,
1969 calldata->arg.fmode);
1971 case -NFS4ERR_STALE_STATEID:
1972 case -NFS4ERR_OLD_STATEID:
1973 case -NFS4ERR_BAD_STATEID:
1974 case -NFS4ERR_EXPIRED:
1975 if (calldata->arg.fmode == 0)
1978 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1979 rpc_restart_call_prepare(task);
1981 nfs_release_seqid(calldata->arg.seqid);
1982 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1985 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1987 struct nfs4_closedata *calldata = data;
1988 struct nfs4_state *state = calldata->state;
1991 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1994 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1995 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1996 spin_lock(&state->owner->so_lock);
1997 /* Calculate the change in open mode */
1998 if (state->n_rdwr == 0) {
1999 if (state->n_rdonly == 0) {
2000 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2001 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2002 calldata->arg.fmode &= ~FMODE_READ;
2004 if (state->n_wronly == 0) {
2005 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2006 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2007 calldata->arg.fmode &= ~FMODE_WRITE;
2010 spin_unlock(&state->owner->so_lock);
2013 /* Note: exit _without_ calling nfs4_close_done */
2014 task->tk_action = NULL;
2018 if (calldata->arg.fmode == 0) {
2019 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2020 if (calldata->roc &&
2021 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2022 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2028 nfs_fattr_init(calldata->res.fattr);
2029 calldata->timestamp = jiffies;
2030 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2031 &calldata->arg.seq_args, &calldata->res.seq_res,
2034 rpc_call_start(task);
2037 static const struct rpc_call_ops nfs4_close_ops = {
2038 .rpc_call_prepare = nfs4_close_prepare,
2039 .rpc_call_done = nfs4_close_done,
2040 .rpc_release = nfs4_free_closedata,
2044 * It is possible for data to be read/written from a mem-mapped file
2045 * after the sys_close call (which hits the vfs layer as a flush).
2046 * This means that we can't safely call nfsv4 close on a file until
2047 * the inode is cleared. This in turn means that we are not good
2048 * NFSv4 citizens - we do not indicate to the server to update the file's
2049 * share state even when we are done with one of the three share
2050 * stateid's in the inode.
2052 * NOTE: Caller must be holding the sp->so_owner semaphore!
2054 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2056 struct nfs_server *server = NFS_SERVER(state->inode);
2057 struct nfs4_closedata *calldata;
2058 struct nfs4_state_owner *sp = state->owner;
2059 struct rpc_task *task;
2060 struct rpc_message msg = {
2061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2062 .rpc_cred = state->owner->so_cred,
2064 struct rpc_task_setup task_setup_data = {
2065 .rpc_client = server->client,
2066 .rpc_message = &msg,
2067 .callback_ops = &nfs4_close_ops,
2068 .workqueue = nfsiod_workqueue,
2069 .flags = RPC_TASK_ASYNC,
2071 int status = -ENOMEM;
2073 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2074 if (calldata == NULL)
2076 calldata->inode = state->inode;
2077 calldata->state = state;
2078 calldata->arg.fh = NFS_FH(state->inode);
2079 calldata->arg.stateid = &state->open_stateid;
2080 /* Serialization for the sequence id */
2081 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2082 if (calldata->arg.seqid == NULL)
2083 goto out_free_calldata;
2084 calldata->arg.fmode = 0;
2085 calldata->arg.bitmask = server->cache_consistency_bitmask;
2086 calldata->res.fattr = &calldata->fattr;
2087 calldata->res.seqid = calldata->arg.seqid;
2088 calldata->res.server = server;
2089 calldata->roc = roc;
2090 nfs_sb_active(calldata->inode->i_sb);
2092 msg.rpc_argp = &calldata->arg;
2093 msg.rpc_resp = &calldata->res;
2094 task_setup_data.callback_data = calldata;
2095 task = rpc_run_task(&task_setup_data);
2097 return PTR_ERR(task);
2100 status = rpc_wait_for_completion_task(task);
2107 pnfs_roc_release(state->inode);
2108 nfs4_put_open_state(state);
2109 nfs4_put_state_owner(sp);
2113 static struct inode *
2114 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2116 struct nfs4_state *state;
2118 /* Protect against concurrent sillydeletes */
2119 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2121 return ERR_CAST(state);
2123 return igrab(state->inode);
2126 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2128 if (ctx->state == NULL)
2131 nfs4_close_sync(ctx->state, ctx->mode);
2133 nfs4_close_state(ctx->state, ctx->mode);
2136 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2138 struct nfs4_server_caps_arg args = {
2141 struct nfs4_server_caps_res res = {};
2142 struct rpc_message msg = {
2143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2149 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2151 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2152 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2153 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2154 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2155 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2156 NFS_CAP_CTIME|NFS_CAP_MTIME);
2157 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2158 server->caps |= NFS_CAP_ACLS;
2159 if (res.has_links != 0)
2160 server->caps |= NFS_CAP_HARDLINKS;
2161 if (res.has_symlinks != 0)
2162 server->caps |= NFS_CAP_SYMLINKS;
2163 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2164 server->caps |= NFS_CAP_FILEID;
2165 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2166 server->caps |= NFS_CAP_MODE;
2167 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2168 server->caps |= NFS_CAP_NLINK;
2169 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2170 server->caps |= NFS_CAP_OWNER;
2171 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2172 server->caps |= NFS_CAP_OWNER_GROUP;
2173 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2174 server->caps |= NFS_CAP_ATIME;
2175 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2176 server->caps |= NFS_CAP_CTIME;
2177 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2178 server->caps |= NFS_CAP_MTIME;
2180 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2181 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2182 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2183 server->acl_bitmask = res.acl_bitmask;
2189 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2191 struct nfs4_exception exception = { };
2194 err = nfs4_handle_exception(server,
2195 _nfs4_server_capabilities(server, fhandle),
2197 } while (exception.retry);
2201 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2202 struct nfs_fsinfo *info)
2204 struct nfs4_lookup_root_arg args = {
2205 .bitmask = nfs4_fattr_bitmap,
2207 struct nfs4_lookup_res res = {
2209 .fattr = info->fattr,
2212 struct rpc_message msg = {
2213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2218 nfs_fattr_init(info->fattr);
2219 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2222 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2223 struct nfs_fsinfo *info)
2225 struct nfs4_exception exception = { };
2228 err = _nfs4_lookup_root(server, fhandle, info);
2231 case -NFS4ERR_WRONGSEC:
2234 err = nfs4_handle_exception(server, err, &exception);
2236 } while (exception.retry);
2240 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2241 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2243 struct rpc_auth *auth;
2246 auth = rpcauth_create(flavor, server->client);
2251 ret = nfs4_lookup_root(server, fhandle, info);
2256 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2257 struct nfs_fsinfo *info)
2259 int i, len, status = 0;
2260 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2262 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2263 flav_array[len] = RPC_AUTH_NULL;
2266 for (i = 0; i < len; i++) {
2267 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2268 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2273 * -EACCESS could mean that the user doesn't have correct permissions
2274 * to access the mount. It could also mean that we tried to mount
2275 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2276 * existing mount programs don't handle -EACCES very well so it should
2277 * be mapped to -EPERM instead.
2279 if (status == -EACCES)
2285 * get the file handle for the "/" directory on the server
2287 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2288 struct nfs_fsinfo *info)
2290 int minor_version = server->nfs_client->cl_minorversion;
2291 int status = nfs4_lookup_root(server, fhandle, info);
2292 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2294 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2295 * by nfs4_map_errors() as this function exits.
2297 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2299 status = nfs4_server_capabilities(server, fhandle);
2301 status = nfs4_do_fsinfo(server, fhandle, info);
2302 return nfs4_map_errors(status);
2305 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2307 * Get locations and (maybe) other attributes of a referral.
2308 * Note that we'll actually follow the referral later when
2309 * we detect fsid mismatch in inode revalidation
2311 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2312 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2314 int status = -ENOMEM;
2315 struct page *page = NULL;
2316 struct nfs4_fs_locations *locations = NULL;
2318 page = alloc_page(GFP_KERNEL);
2321 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2322 if (locations == NULL)
2325 status = nfs4_proc_fs_locations(dir, name, locations, page);
2328 /* Make sure server returned a different fsid for the referral */
2329 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2330 dprintk("%s: server did not return a different fsid for"
2331 " a referral at %s\n", __func__, name->name);
2335 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2336 nfs_fixup_referral_attributes(&locations->fattr);
2338 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2339 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2340 memset(fhandle, 0, sizeof(struct nfs_fh));
2348 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2350 struct nfs4_getattr_arg args = {
2352 .bitmask = server->attr_bitmask,
2354 struct nfs4_getattr_res res = {
2358 struct rpc_message msg = {
2359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2364 nfs_fattr_init(fattr);
2365 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2368 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2370 struct nfs4_exception exception = { };
2373 err = nfs4_handle_exception(server,
2374 _nfs4_proc_getattr(server, fhandle, fattr),
2376 } while (exception.retry);
2381 * The file is not closed if it is opened due to the a request to change
2382 * the size of the file. The open call will not be needed once the
2383 * VFS layer lookup-intents are implemented.
2385 * Close is called when the inode is destroyed.
2386 * If we haven't opened the file for O_WRONLY, we
2387 * need to in the size_change case to obtain a stateid.
2390 * Because OPEN is always done by name in nfsv4, it is
2391 * possible that we opened a different file by the same
2392 * name. We can recognize this race condition, but we
2393 * can't do anything about it besides returning an error.
2395 * This will be fixed with VFS changes (lookup-intent).
2398 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2399 struct iattr *sattr)
2401 struct inode *inode = dentry->d_inode;
2402 struct rpc_cred *cred = NULL;
2403 struct nfs4_state *state = NULL;
2406 if (pnfs_ld_layoutret_on_setattr(inode))
2407 pnfs_return_layout(inode);
2409 nfs_fattr_init(fattr);
2411 /* Search for an existing open(O_WRITE) file */
2412 if (sattr->ia_valid & ATTR_FILE) {
2413 struct nfs_open_context *ctx;
2415 ctx = nfs_file_open_context(sattr->ia_file);
2422 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2424 nfs_setattr_update_inode(inode, sattr);
2428 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2429 const struct qstr *name, struct nfs_fh *fhandle,
2430 struct nfs_fattr *fattr)
2432 struct nfs_server *server = NFS_SERVER(dir);
2434 struct nfs4_lookup_arg args = {
2435 .bitmask = server->attr_bitmask,
2436 .dir_fh = NFS_FH(dir),
2439 struct nfs4_lookup_res res = {
2444 struct rpc_message msg = {
2445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2450 nfs_fattr_init(fattr);
2452 dprintk("NFS call lookup %s\n", name->name);
2453 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2454 dprintk("NFS reply lookup: %d\n", status);
2458 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2460 memset(fh, 0, sizeof(struct nfs_fh));
2461 fattr->fsid.major = 1;
2462 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2463 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2464 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2468 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2469 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2471 struct nfs4_exception exception = { };
2476 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2478 case -NFS4ERR_BADNAME:
2480 case -NFS4ERR_MOVED:
2481 return nfs4_get_referral(dir, name, fattr, fhandle);
2482 case -NFS4ERR_WRONGSEC:
2483 nfs_fixup_secinfo_attributes(fattr, fhandle);
2485 err = nfs4_handle_exception(NFS_SERVER(dir),
2486 status, &exception);
2487 } while (exception.retry);
2491 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2493 struct nfs_server *server = NFS_SERVER(inode);
2494 struct nfs4_accessargs args = {
2495 .fh = NFS_FH(inode),
2496 .bitmask = server->attr_bitmask,
2498 struct nfs4_accessres res = {
2501 struct rpc_message msg = {
2502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2505 .rpc_cred = entry->cred,
2507 int mode = entry->mask;
2511 * Determine which access bits we want to ask for...
2513 if (mode & MAY_READ)
2514 args.access |= NFS4_ACCESS_READ;
2515 if (S_ISDIR(inode->i_mode)) {
2516 if (mode & MAY_WRITE)
2517 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2518 if (mode & MAY_EXEC)
2519 args.access |= NFS4_ACCESS_LOOKUP;
2521 if (mode & MAY_WRITE)
2522 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2523 if (mode & MAY_EXEC)
2524 args.access |= NFS4_ACCESS_EXECUTE;
2527 res.fattr = nfs_alloc_fattr();
2528 if (res.fattr == NULL)
2531 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2534 if (res.access & NFS4_ACCESS_READ)
2535 entry->mask |= MAY_READ;
2536 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2537 entry->mask |= MAY_WRITE;
2538 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2539 entry->mask |= MAY_EXEC;
2540 nfs_refresh_inode(inode, res.fattr);
2542 nfs_free_fattr(res.fattr);
2546 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2548 struct nfs4_exception exception = { };
2551 err = nfs4_handle_exception(NFS_SERVER(inode),
2552 _nfs4_proc_access(inode, entry),
2554 } while (exception.retry);
2559 * TODO: For the time being, we don't try to get any attributes
2560 * along with any of the zero-copy operations READ, READDIR,
2563 * In the case of the first three, we want to put the GETATTR
2564 * after the read-type operation -- this is because it is hard
2565 * to predict the length of a GETATTR response in v4, and thus
2566 * align the READ data correctly. This means that the GETATTR
2567 * may end up partially falling into the page cache, and we should
2568 * shift it into the 'tail' of the xdr_buf before processing.
2569 * To do this efficiently, we need to know the total length
2570 * of data received, which doesn't seem to be available outside
2573 * In the case of WRITE, we also want to put the GETATTR after
2574 * the operation -- in this case because we want to make sure
2575 * we get the post-operation mtime and size. This means that
2576 * we can't use xdr_encode_pages() as written: we need a variant
2577 * of it which would leave room in the 'tail' iovec.
2579 * Both of these changes to the XDR layer would in fact be quite
2580 * minor, but I decided to leave them for a subsequent patch.
2582 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2583 unsigned int pgbase, unsigned int pglen)
2585 struct nfs4_readlink args = {
2586 .fh = NFS_FH(inode),
2591 struct nfs4_readlink_res res;
2592 struct rpc_message msg = {
2593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2598 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2601 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2602 unsigned int pgbase, unsigned int pglen)
2604 struct nfs4_exception exception = { };
2607 err = nfs4_handle_exception(NFS_SERVER(inode),
2608 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2610 } while (exception.retry);
2616 * We will need to arrange for the VFS layer to provide an atomic open.
2617 * Until then, this create/open method is prone to inefficiency and race
2618 * conditions due to the lookup, create, and open VFS calls from sys_open()
2619 * placed on the wire.
2621 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2622 * The file will be opened again in the subsequent VFS open call
2623 * (nfs4_proc_file_open).
2625 * The open for read will just hang around to be used by any process that
2626 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2630 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2631 int flags, struct nfs_open_context *ctx)
2633 struct dentry *de = dentry;
2634 struct nfs4_state *state;
2635 struct rpc_cred *cred = NULL;
2644 sattr->ia_mode &= ~current_umask();
2645 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2647 if (IS_ERR(state)) {
2648 status = PTR_ERR(state);
2651 d_add(dentry, igrab(state->inode));
2652 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2656 nfs4_close_sync(state, fmode);
2661 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2663 struct nfs_server *server = NFS_SERVER(dir);
2664 struct nfs_removeargs args = {
2666 .name.len = name->len,
2667 .name.name = name->name,
2668 .bitmask = server->attr_bitmask,
2670 struct nfs_removeres res = {
2673 struct rpc_message msg = {
2674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2678 int status = -ENOMEM;
2680 res.dir_attr = nfs_alloc_fattr();
2681 if (res.dir_attr == NULL)
2684 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2686 update_changeattr(dir, &res.cinfo);
2687 nfs_post_op_update_inode(dir, res.dir_attr);
2689 nfs_free_fattr(res.dir_attr);
2694 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2696 struct nfs4_exception exception = { };
2699 err = nfs4_handle_exception(NFS_SERVER(dir),
2700 _nfs4_proc_remove(dir, name),
2702 } while (exception.retry);
2706 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2708 struct nfs_server *server = NFS_SERVER(dir);
2709 struct nfs_removeargs *args = msg->rpc_argp;
2710 struct nfs_removeres *res = msg->rpc_resp;
2712 args->bitmask = server->cache_consistency_bitmask;
2713 res->server = server;
2714 res->seq_res.sr_slot = NULL;
2715 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2718 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2720 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2722 if (!nfs4_sequence_done(task, &res->seq_res))
2724 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2726 update_changeattr(dir, &res->cinfo);
2727 nfs_post_op_update_inode(dir, res->dir_attr);
2731 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2733 struct nfs_server *server = NFS_SERVER(dir);
2734 struct nfs_renameargs *arg = msg->rpc_argp;
2735 struct nfs_renameres *res = msg->rpc_resp;
2737 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2738 arg->bitmask = server->attr_bitmask;
2739 res->server = server;
2742 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2743 struct inode *new_dir)
2745 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2747 if (!nfs4_sequence_done(task, &res->seq_res))
2749 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2752 update_changeattr(old_dir, &res->old_cinfo);
2753 nfs_post_op_update_inode(old_dir, res->old_fattr);
2754 update_changeattr(new_dir, &res->new_cinfo);
2755 nfs_post_op_update_inode(new_dir, res->new_fattr);
2759 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2760 struct inode *new_dir, struct qstr *new_name)
2762 struct nfs_server *server = NFS_SERVER(old_dir);
2763 struct nfs_renameargs arg = {
2764 .old_dir = NFS_FH(old_dir),
2765 .new_dir = NFS_FH(new_dir),
2766 .old_name = old_name,
2767 .new_name = new_name,
2768 .bitmask = server->attr_bitmask,
2770 struct nfs_renameres res = {
2773 struct rpc_message msg = {
2774 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2778 int status = -ENOMEM;
2780 res.old_fattr = nfs_alloc_fattr();
2781 res.new_fattr = nfs_alloc_fattr();
2782 if (res.old_fattr == NULL || res.new_fattr == NULL)
2785 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2787 update_changeattr(old_dir, &res.old_cinfo);
2788 nfs_post_op_update_inode(old_dir, res.old_fattr);
2789 update_changeattr(new_dir, &res.new_cinfo);
2790 nfs_post_op_update_inode(new_dir, res.new_fattr);
2793 nfs_free_fattr(res.new_fattr);
2794 nfs_free_fattr(res.old_fattr);
2798 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2799 struct inode *new_dir, struct qstr *new_name)
2801 struct nfs4_exception exception = { };
2804 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2805 _nfs4_proc_rename(old_dir, old_name,
2808 } while (exception.retry);
2812 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2814 struct nfs_server *server = NFS_SERVER(inode);
2815 struct nfs4_link_arg arg = {
2816 .fh = NFS_FH(inode),
2817 .dir_fh = NFS_FH(dir),
2819 .bitmask = server->attr_bitmask,
2821 struct nfs4_link_res res = {
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2829 int status = -ENOMEM;
2831 res.fattr = nfs_alloc_fattr();
2832 res.dir_attr = nfs_alloc_fattr();
2833 if (res.fattr == NULL || res.dir_attr == NULL)
2836 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2838 update_changeattr(dir, &res.cinfo);
2839 nfs_post_op_update_inode(dir, res.dir_attr);
2840 nfs_post_op_update_inode(inode, res.fattr);
2843 nfs_free_fattr(res.dir_attr);
2844 nfs_free_fattr(res.fattr);
2848 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2850 struct nfs4_exception exception = { };
2853 err = nfs4_handle_exception(NFS_SERVER(inode),
2854 _nfs4_proc_link(inode, dir, name),
2856 } while (exception.retry);
2860 struct nfs4_createdata {
2861 struct rpc_message msg;
2862 struct nfs4_create_arg arg;
2863 struct nfs4_create_res res;
2865 struct nfs_fattr fattr;
2866 struct nfs_fattr dir_fattr;
2869 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2870 struct qstr *name, struct iattr *sattr, u32 ftype)
2872 struct nfs4_createdata *data;
2874 data = kzalloc(sizeof(*data), GFP_KERNEL);
2876 struct nfs_server *server = NFS_SERVER(dir);
2878 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2879 data->msg.rpc_argp = &data->arg;
2880 data->msg.rpc_resp = &data->res;
2881 data->arg.dir_fh = NFS_FH(dir);
2882 data->arg.server = server;
2883 data->arg.name = name;
2884 data->arg.attrs = sattr;
2885 data->arg.ftype = ftype;
2886 data->arg.bitmask = server->attr_bitmask;
2887 data->res.server = server;
2888 data->res.fh = &data->fh;
2889 data->res.fattr = &data->fattr;
2890 data->res.dir_fattr = &data->dir_fattr;
2891 nfs_fattr_init(data->res.fattr);
2892 nfs_fattr_init(data->res.dir_fattr);
2897 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2899 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2900 &data->arg.seq_args, &data->res.seq_res, 1);
2902 update_changeattr(dir, &data->res.dir_cinfo);
2903 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2904 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2909 static void nfs4_free_createdata(struct nfs4_createdata *data)
2914 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2915 struct page *page, unsigned int len, struct iattr *sattr)
2917 struct nfs4_createdata *data;
2918 int status = -ENAMETOOLONG;
2920 if (len > NFS4_MAXPATHLEN)
2924 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2928 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2929 data->arg.u.symlink.pages = &page;
2930 data->arg.u.symlink.len = len;
2932 status = nfs4_do_create(dir, dentry, data);
2934 nfs4_free_createdata(data);
2939 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2940 struct page *page, unsigned int len, struct iattr *sattr)
2942 struct nfs4_exception exception = { };
2945 err = nfs4_handle_exception(NFS_SERVER(dir),
2946 _nfs4_proc_symlink(dir, dentry, page,
2949 } while (exception.retry);
2953 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2954 struct iattr *sattr)
2956 struct nfs4_createdata *data;
2957 int status = -ENOMEM;
2959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2963 status = nfs4_do_create(dir, dentry, data);
2965 nfs4_free_createdata(data);
2970 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2971 struct iattr *sattr)
2973 struct nfs4_exception exception = { };
2976 sattr->ia_mode &= ~current_umask();
2978 err = nfs4_handle_exception(NFS_SERVER(dir),
2979 _nfs4_proc_mkdir(dir, dentry, sattr),
2981 } while (exception.retry);
2985 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2986 u64 cookie, struct page **pages, unsigned int count, int plus)
2988 struct inode *dir = dentry->d_inode;
2989 struct nfs4_readdir_arg args = {
2994 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2997 struct nfs4_readdir_res res;
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3006 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3007 dentry->d_parent->d_name.name,
3008 dentry->d_name.name,
3009 (unsigned long long)cookie);
3010 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3011 res.pgbase = args.pgbase;
3012 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3014 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3015 status += args.pgbase;
3018 nfs_invalidate_atime(dir);
3020 dprintk("%s: returns %d\n", __func__, status);
3024 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3025 u64 cookie, struct page **pages, unsigned int count, int plus)
3027 struct nfs4_exception exception = { };
3030 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3031 _nfs4_proc_readdir(dentry, cred, cookie,
3032 pages, count, plus),
3034 } while (exception.retry);
3038 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3039 struct iattr *sattr, dev_t rdev)
3041 struct nfs4_createdata *data;
3042 int mode = sattr->ia_mode;
3043 int status = -ENOMEM;
3045 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3046 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3048 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3053 data->arg.ftype = NF4FIFO;
3054 else if (S_ISBLK(mode)) {
3055 data->arg.ftype = NF4BLK;
3056 data->arg.u.device.specdata1 = MAJOR(rdev);
3057 data->arg.u.device.specdata2 = MINOR(rdev);
3059 else if (S_ISCHR(mode)) {
3060 data->arg.ftype = NF4CHR;
3061 data->arg.u.device.specdata1 = MAJOR(rdev);
3062 data->arg.u.device.specdata2 = MINOR(rdev);
3065 status = nfs4_do_create(dir, dentry, data);
3067 nfs4_free_createdata(data);
3072 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3073 struct iattr *sattr, dev_t rdev)
3075 struct nfs4_exception exception = { };
3078 sattr->ia_mode &= ~current_umask();
3080 err = nfs4_handle_exception(NFS_SERVER(dir),
3081 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3083 } while (exception.retry);
3087 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3088 struct nfs_fsstat *fsstat)
3090 struct nfs4_statfs_arg args = {
3092 .bitmask = server->attr_bitmask,
3094 struct nfs4_statfs_res res = {
3097 struct rpc_message msg = {
3098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3103 nfs_fattr_init(fsstat->fattr);
3104 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3107 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3109 struct nfs4_exception exception = { };
3112 err = nfs4_handle_exception(server,
3113 _nfs4_proc_statfs(server, fhandle, fsstat),
3115 } while (exception.retry);
3119 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3120 struct nfs_fsinfo *fsinfo)
3122 struct nfs4_fsinfo_arg args = {
3124 .bitmask = server->attr_bitmask,
3126 struct nfs4_fsinfo_res res = {
3129 struct rpc_message msg = {
3130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3135 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3138 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3140 struct nfs4_exception exception = { };
3144 err = nfs4_handle_exception(server,
3145 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3147 } while (exception.retry);
3151 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3153 nfs_fattr_init(fsinfo->fattr);
3154 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3157 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3158 struct nfs_pathconf *pathconf)
3160 struct nfs4_pathconf_arg args = {
3162 .bitmask = server->attr_bitmask,
3164 struct nfs4_pathconf_res res = {
3165 .pathconf = pathconf,
3167 struct rpc_message msg = {
3168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3173 /* None of the pathconf attributes are mandatory to implement */
3174 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3175 memset(pathconf, 0, sizeof(*pathconf));
3179 nfs_fattr_init(pathconf->fattr);
3180 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3183 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3184 struct nfs_pathconf *pathconf)
3186 struct nfs4_exception exception = { };
3190 err = nfs4_handle_exception(server,
3191 _nfs4_proc_pathconf(server, fhandle, pathconf),
3193 } while (exception.retry);
3197 void __nfs4_read_done_cb(struct nfs_read_data *data)
3199 nfs_invalidate_atime(data->inode);
3202 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3204 struct nfs_server *server = NFS_SERVER(data->inode);
3206 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3207 rpc_restart_call_prepare(task);
3211 __nfs4_read_done_cb(data);
3212 if (task->tk_status > 0)
3213 renew_lease(server, data->timestamp);
3217 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3220 dprintk("--> %s\n", __func__);
3222 if (!nfs4_sequence_done(task, &data->res.seq_res))
3225 return data->read_done_cb ? data->read_done_cb(task, data) :
3226 nfs4_read_done_cb(task, data);
3229 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3231 data->timestamp = jiffies;
3232 data->read_done_cb = nfs4_read_done_cb;
3233 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3236 /* Reset the the nfs_read_data to send the read to the MDS. */
3237 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3239 dprintk("%s Reset task for i/o through\n", __func__);
3240 put_lseg(data->lseg);
3242 /* offsets will differ in the dense stripe case */
3243 data->args.offset = data->mds_offset;
3244 data->ds_clp = NULL;
3245 data->args.fh = NFS_FH(data->inode);
3246 data->read_done_cb = nfs4_read_done_cb;
3247 task->tk_ops = data->mds_ops;
3248 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3250 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3252 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3254 struct inode *inode = data->inode;
3256 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3257 rpc_restart_call_prepare(task);
3260 if (task->tk_status >= 0) {
3261 renew_lease(NFS_SERVER(inode), data->timestamp);
3262 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3267 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3269 if (!nfs4_sequence_done(task, &data->res.seq_res))
3271 return data->write_done_cb ? data->write_done_cb(task, data) :
3272 nfs4_write_done_cb(task, data);
3275 /* Reset the the nfs_write_data to send the write to the MDS. */
3276 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3278 dprintk("%s Reset task for i/o through\n", __func__);
3279 put_lseg(data->lseg);
3281 data->ds_clp = NULL;
3282 data->write_done_cb = nfs4_write_done_cb;
3283 data->args.fh = NFS_FH(data->inode);
3284 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3285 data->args.offset = data->mds_offset;
3286 data->res.fattr = &data->fattr;
3287 task->tk_ops = data->mds_ops;
3288 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3290 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3292 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3294 struct nfs_server *server = NFS_SERVER(data->inode);
3297 data->args.bitmask = NULL;
3298 data->res.fattr = NULL;
3300 data->args.bitmask = server->cache_consistency_bitmask;
3301 if (!data->write_done_cb)
3302 data->write_done_cb = nfs4_write_done_cb;
3303 data->res.server = server;
3304 data->timestamp = jiffies;
3306 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3309 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3311 struct inode *inode = data->inode;
3313 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3314 rpc_restart_call_prepare(task);
3317 nfs_refresh_inode(inode, data->res.fattr);
3321 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3323 if (!nfs4_sequence_done(task, &data->res.seq_res))
3325 return data->write_done_cb(task, data);
3328 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3330 struct nfs_server *server = NFS_SERVER(data->inode);
3333 data->args.bitmask = NULL;
3334 data->res.fattr = NULL;
3336 data->args.bitmask = server->cache_consistency_bitmask;
3337 if (!data->write_done_cb)
3338 data->write_done_cb = nfs4_commit_done_cb;
3339 data->res.server = server;
3340 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3343 struct nfs4_renewdata {
3344 struct nfs_client *client;
3345 unsigned long timestamp;
3349 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3350 * standalone procedure for queueing an asynchronous RENEW.
3352 static void nfs4_renew_release(void *calldata)
3354 struct nfs4_renewdata *data = calldata;
3355 struct nfs_client *clp = data->client;
3357 if (atomic_read(&clp->cl_count) > 1)
3358 nfs4_schedule_state_renewal(clp);
3359 nfs_put_client(clp);
3363 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3365 struct nfs4_renewdata *data = calldata;
3366 struct nfs_client *clp = data->client;
3367 unsigned long timestamp = data->timestamp;
3369 if (task->tk_status < 0) {
3370 /* Unless we're shutting down, schedule state recovery! */
3371 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3373 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3374 nfs4_schedule_lease_recovery(clp);
3377 nfs4_schedule_path_down_recovery(clp);
3379 do_renew_lease(clp, timestamp);
3382 static const struct rpc_call_ops nfs4_renew_ops = {
3383 .rpc_call_done = nfs4_renew_done,
3384 .rpc_release = nfs4_renew_release,
3387 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3394 struct nfs4_renewdata *data;
3396 if (renew_flags == 0)
3398 if (!atomic_inc_not_zero(&clp->cl_count))
3400 data = kmalloc(sizeof(*data), GFP_NOFS);
3404 data->timestamp = jiffies;
3405 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3406 &nfs4_renew_ops, data);
3409 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3411 struct rpc_message msg = {
3412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3416 unsigned long now = jiffies;
3419 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3422 do_renew_lease(clp, now);
3426 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3428 return (server->caps & NFS_CAP_ACLS)
3429 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3430 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3433 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3434 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3437 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3439 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3440 struct page **pages, unsigned int *pgbase)
3442 struct page *newpage, **spages;
3448 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3449 newpage = alloc_page(GFP_KERNEL);
3451 if (newpage == NULL)
3453 memcpy(page_address(newpage), buf, len);
3458 } while (buflen != 0);
3464 __free_page(spages[rc-1]);
3468 struct nfs4_cached_acl {
3474 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3476 struct nfs_inode *nfsi = NFS_I(inode);
3478 spin_lock(&inode->i_lock);
3479 kfree(nfsi->nfs4_acl);
3480 nfsi->nfs4_acl = acl;
3481 spin_unlock(&inode->i_lock);
3484 static void nfs4_zap_acl_attr(struct inode *inode)
3486 nfs4_set_cached_acl(inode, NULL);
3489 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3491 struct nfs_inode *nfsi = NFS_I(inode);
3492 struct nfs4_cached_acl *acl;
3495 spin_lock(&inode->i_lock);
3496 acl = nfsi->nfs4_acl;
3499 if (buf == NULL) /* user is just asking for length */
3501 if (acl->cached == 0)
3503 ret = -ERANGE; /* see getxattr(2) man page */
3504 if (acl->len > buflen)
3506 memcpy(buf, acl->data, acl->len);
3510 spin_unlock(&inode->i_lock);
3514 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3516 struct nfs4_cached_acl *acl;
3518 if (buf && acl_len <= PAGE_SIZE) {
3519 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3523 memcpy(acl->data, buf, acl_len);
3525 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3532 nfs4_set_cached_acl(inode, acl);
3536 * The getxattr API returns the required buffer length when called with a
3537 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3538 * the required buf. On a NULL buf, we send a page of data to the server
3539 * guessing that the ACL request can be serviced by a page. If so, we cache
3540 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3541 * the cache. If not so, we throw away the page, and cache the required
3542 * length. The next getxattr call will then produce another round trip to
3543 * the server, this time with the input buf of the required size.
3545 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3547 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3548 struct nfs_getaclargs args = {
3549 .fh = NFS_FH(inode),
3553 struct nfs_getaclres res = {
3557 struct rpc_message msg = {
3558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3562 int ret = -ENOMEM, npages, i, acl_len = 0;
3564 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3565 /* As long as we're doing a round trip to the server anyway,
3566 * let's be prepared for a page of acl data. */
3570 for (i = 0; i < npages; i++) {
3571 pages[i] = alloc_page(GFP_KERNEL);
3576 /* for decoding across pages */
3577 args.acl_scratch = alloc_page(GFP_KERNEL);
3578 if (!args.acl_scratch)
3581 args.acl_len = npages * PAGE_SIZE;
3582 args.acl_pgbase = 0;
3583 /* Let decode_getfacl know not to fail if the ACL data is larger than
3584 * the page we send as a guess */
3586 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3587 resp_buf = page_address(pages[0]);
3589 dprintk("%s buf %p buflen %ld npages %d args.acl_len %ld\n",
3590 __func__, buf, buflen, npages, args.acl_len);
3591 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3592 &msg, &args.seq_args, &res.seq_res, 0);
3596 acl_len = res.acl_len - res.acl_data_offset;
3597 if (acl_len > args.acl_len)
3598 nfs4_write_cached_acl(inode, NULL, acl_len);
3600 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3604 if (acl_len > buflen)
3606 _copy_from_pages(buf, pages, res.acl_data_offset,
3611 for (i = 0; i < npages; i++)
3613 __free_page(pages[i]);
3614 if (args.acl_scratch)
3615 __free_page(args.acl_scratch);
3619 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3621 struct nfs4_exception exception = { };
3624 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3627 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3628 } while (exception.retry);
3632 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3634 struct nfs_server *server = NFS_SERVER(inode);
3637 if (!nfs4_server_supports_acls(server))
3639 ret = nfs_revalidate_inode(server, inode);
3642 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3643 nfs_zap_acl_cache(inode);
3644 ret = nfs4_read_cached_acl(inode, buf, buflen);
3646 /* -ENOENT is returned if there is no ACL or if there is an ACL
3647 * but no cached acl data, just the acl length */
3649 return nfs4_get_acl_uncached(inode, buf, buflen);
3652 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3654 struct nfs_server *server = NFS_SERVER(inode);
3655 struct page *pages[NFS4ACL_MAXPAGES];
3656 struct nfs_setaclargs arg = {
3657 .fh = NFS_FH(inode),
3661 struct nfs_setaclres res;
3662 struct rpc_message msg = {
3663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3669 if (!nfs4_server_supports_acls(server))
3671 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3674 nfs_inode_return_delegation(inode);
3675 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3678 * Free each page after tx, so the only ref left is
3679 * held by the network stack
3682 put_page(pages[i-1]);
3685 * Acl update can result in inode attribute update.
3686 * so mark the attribute cache invalid.
3688 spin_lock(&inode->i_lock);
3689 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3690 spin_unlock(&inode->i_lock);
3691 nfs_access_zap_cache(inode);
3692 nfs_zap_acl_cache(inode);
3696 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3698 struct nfs4_exception exception = { };
3701 err = nfs4_handle_exception(NFS_SERVER(inode),
3702 __nfs4_proc_set_acl(inode, buf, buflen),
3704 } while (exception.retry);
3709 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3711 struct nfs_client *clp = server->nfs_client;
3713 if (task->tk_status >= 0)
3715 switch(task->tk_status) {
3716 case -NFS4ERR_ADMIN_REVOKED:
3717 case -NFS4ERR_BAD_STATEID:
3718 case -NFS4ERR_OPENMODE:
3721 nfs4_schedule_stateid_recovery(server, state);
3722 goto wait_on_recovery;
3723 case -NFS4ERR_EXPIRED:
3725 nfs4_schedule_stateid_recovery(server, state);
3726 case -NFS4ERR_STALE_STATEID:
3727 case -NFS4ERR_STALE_CLIENTID:
3728 nfs4_schedule_lease_recovery(clp);
3729 goto wait_on_recovery;
3730 #if defined(CONFIG_NFS_V4_1)
3731 case -NFS4ERR_BADSESSION:
3732 case -NFS4ERR_BADSLOT:
3733 case -NFS4ERR_BAD_HIGH_SLOT:
3734 case -NFS4ERR_DEADSESSION:
3735 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3736 case -NFS4ERR_SEQ_FALSE_RETRY:
3737 case -NFS4ERR_SEQ_MISORDERED:
3738 dprintk("%s ERROR %d, Reset session\n", __func__,
3740 nfs4_schedule_session_recovery(clp->cl_session);
3741 task->tk_status = 0;
3743 #endif /* CONFIG_NFS_V4_1 */
3744 case -NFS4ERR_DELAY:
3745 nfs_inc_server_stats(server, NFSIOS_DELAY);
3746 case -NFS4ERR_GRACE:
3748 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3749 task->tk_status = 0;
3751 case -NFS4ERR_RETRY_UNCACHED_REP:
3752 case -NFS4ERR_OLD_STATEID:
3753 task->tk_status = 0;
3756 task->tk_status = nfs4_map_errors(task->tk_status);
3759 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3760 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3761 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3762 task->tk_status = 0;
3766 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3767 unsigned short port, struct rpc_cred *cred,
3768 struct nfs4_setclientid_res *res)
3770 nfs4_verifier sc_verifier;
3771 struct nfs4_setclientid setclientid = {
3772 .sc_verifier = &sc_verifier,
3774 .sc_cb_ident = clp->cl_cb_ident,
3776 struct rpc_message msg = {
3777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3778 .rpc_argp = &setclientid,
3786 p = (__be32*)sc_verifier.data;
3787 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3788 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3791 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3792 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3794 rpc_peeraddr2str(clp->cl_rpcclient,
3796 rpc_peeraddr2str(clp->cl_rpcclient,
3798 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3799 clp->cl_id_uniquifier);
3800 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3801 sizeof(setclientid.sc_netid),
3802 rpc_peeraddr2str(clp->cl_rpcclient,
3803 RPC_DISPLAY_NETID));
3804 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3805 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3806 clp->cl_ipaddr, port >> 8, port & 255);
3808 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3809 if (status != -NFS4ERR_CLID_INUSE)
3812 ++clp->cl_id_uniquifier;
3816 ssleep(clp->cl_lease_time / HZ + 1);
3821 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3822 struct nfs4_setclientid_res *arg,
3823 struct rpc_cred *cred)
3825 struct nfs_fsinfo fsinfo;
3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3829 .rpc_resp = &fsinfo,
3836 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3838 spin_lock(&clp->cl_lock);
3839 clp->cl_lease_time = fsinfo.lease_time * HZ;
3840 clp->cl_last_renewal = now;
3841 spin_unlock(&clp->cl_lock);
3846 struct nfs4_delegreturndata {
3847 struct nfs4_delegreturnargs args;
3848 struct nfs4_delegreturnres res;
3850 nfs4_stateid stateid;
3851 unsigned long timestamp;
3852 struct nfs_fattr fattr;
3856 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3858 struct nfs4_delegreturndata *data = calldata;
3860 if (!nfs4_sequence_done(task, &data->res.seq_res))
3863 switch (task->tk_status) {
3864 case -NFS4ERR_STALE_STATEID:
3865 case -NFS4ERR_EXPIRED:
3867 renew_lease(data->res.server, data->timestamp);
3870 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3872 rpc_restart_call_prepare(task);
3876 data->rpc_status = task->tk_status;
3879 static void nfs4_delegreturn_release(void *calldata)
3884 #if defined(CONFIG_NFS_V4_1)
3885 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3887 struct nfs4_delegreturndata *d_data;
3889 d_data = (struct nfs4_delegreturndata *)data;
3891 if (nfs4_setup_sequence(d_data->res.server,
3892 &d_data->args.seq_args,
3893 &d_data->res.seq_res, 1, task))
3895 rpc_call_start(task);
3897 #endif /* CONFIG_NFS_V4_1 */
3899 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3900 #if defined(CONFIG_NFS_V4_1)
3901 .rpc_call_prepare = nfs4_delegreturn_prepare,
3902 #endif /* CONFIG_NFS_V4_1 */
3903 .rpc_call_done = nfs4_delegreturn_done,
3904 .rpc_release = nfs4_delegreturn_release,
3907 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3909 struct nfs4_delegreturndata *data;
3910 struct nfs_server *server = NFS_SERVER(inode);
3911 struct rpc_task *task;
3912 struct rpc_message msg = {
3913 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3916 struct rpc_task_setup task_setup_data = {
3917 .rpc_client = server->client,
3918 .rpc_message = &msg,
3919 .callback_ops = &nfs4_delegreturn_ops,
3920 .flags = RPC_TASK_ASYNC,
3924 data = kzalloc(sizeof(*data), GFP_NOFS);
3927 data->args.fhandle = &data->fh;
3928 data->args.stateid = &data->stateid;
3929 data->args.bitmask = server->attr_bitmask;
3930 nfs_copy_fh(&data->fh, NFS_FH(inode));
3931 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3932 data->res.fattr = &data->fattr;
3933 data->res.server = server;
3934 nfs_fattr_init(data->res.fattr);
3935 data->timestamp = jiffies;
3936 data->rpc_status = 0;
3938 task_setup_data.callback_data = data;
3939 msg.rpc_argp = &data->args;
3940 msg.rpc_resp = &data->res;
3941 task = rpc_run_task(&task_setup_data);
3943 return PTR_ERR(task);
3946 status = nfs4_wait_for_completion_rpc_task(task);
3949 status = data->rpc_status;
3952 nfs_refresh_inode(inode, &data->fattr);
3958 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3960 struct nfs_server *server = NFS_SERVER(inode);
3961 struct nfs4_exception exception = { };
3964 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3966 case -NFS4ERR_STALE_STATEID:
3967 case -NFS4ERR_EXPIRED:
3971 err = nfs4_handle_exception(server, err, &exception);
3972 } while (exception.retry);
3976 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3977 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3980 * sleep, with exponential backoff, and retry the LOCK operation.
3982 static unsigned long
3983 nfs4_set_lock_task_retry(unsigned long timeout)
3985 schedule_timeout_killable(timeout);
3987 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3988 return NFS4_LOCK_MAXTIMEOUT;
3992 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3994 struct inode *inode = state->inode;
3995 struct nfs_server *server = NFS_SERVER(inode);
3996 struct nfs_client *clp = server->nfs_client;
3997 struct nfs_lockt_args arg = {
3998 .fh = NFS_FH(inode),
4001 struct nfs_lockt_res res = {
4004 struct rpc_message msg = {
4005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4008 .rpc_cred = state->owner->so_cred,
4010 struct nfs4_lock_state *lsp;
4013 arg.lock_owner.clientid = clp->cl_clientid;
4014 status = nfs4_set_lock_state(state, request);
4017 lsp = request->fl_u.nfs4_fl.owner;
4018 arg.lock_owner.id = lsp->ls_id.id;
4019 arg.lock_owner.s_dev = server->s_dev;
4020 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4023 request->fl_type = F_UNLCK;
4025 case -NFS4ERR_DENIED:
4028 request->fl_ops->fl_release_private(request);
4033 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4035 struct nfs4_exception exception = { };
4039 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4040 _nfs4_proc_getlk(state, cmd, request),
4042 } while (exception.retry);
4046 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4049 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4051 res = posix_lock_file_wait(file, fl);
4054 res = flock_lock_file_wait(file, fl);
4062 struct nfs4_unlockdata {
4063 struct nfs_locku_args arg;
4064 struct nfs_locku_res res;
4065 struct nfs4_lock_state *lsp;
4066 struct nfs_open_context *ctx;
4067 struct file_lock fl;
4068 const struct nfs_server *server;
4069 unsigned long timestamp;
4072 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4073 struct nfs_open_context *ctx,
4074 struct nfs4_lock_state *lsp,
4075 struct nfs_seqid *seqid)
4077 struct nfs4_unlockdata *p;
4078 struct inode *inode = lsp->ls_state->inode;
4080 p = kzalloc(sizeof(*p), GFP_NOFS);
4083 p->arg.fh = NFS_FH(inode);
4085 p->arg.seqid = seqid;
4086 p->res.seqid = seqid;
4087 p->arg.stateid = &lsp->ls_stateid;
4089 atomic_inc(&lsp->ls_count);
4090 /* Ensure we don't close file until we're done freeing locks! */
4091 p->ctx = get_nfs_open_context(ctx);
4092 memcpy(&p->fl, fl, sizeof(p->fl));
4093 p->server = NFS_SERVER(inode);
4097 static void nfs4_locku_release_calldata(void *data)
4099 struct nfs4_unlockdata *calldata = data;
4100 nfs_free_seqid(calldata->arg.seqid);
4101 nfs4_put_lock_state(calldata->lsp);
4102 put_nfs_open_context(calldata->ctx);
4106 static void nfs4_locku_done(struct rpc_task *task, void *data)
4108 struct nfs4_unlockdata *calldata = data;
4110 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4112 switch (task->tk_status) {
4114 memcpy(calldata->lsp->ls_stateid.data,
4115 calldata->res.stateid.data,
4116 sizeof(calldata->lsp->ls_stateid.data));
4117 renew_lease(calldata->server, calldata->timestamp);
4119 case -NFS4ERR_BAD_STATEID:
4120 case -NFS4ERR_OLD_STATEID:
4121 case -NFS4ERR_STALE_STATEID:
4122 case -NFS4ERR_EXPIRED:
4125 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4126 rpc_restart_call_prepare(task);
4130 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4132 struct nfs4_unlockdata *calldata = data;
4134 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4136 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4137 /* Note: exit _without_ running nfs4_locku_done */
4138 task->tk_action = NULL;
4141 calldata->timestamp = jiffies;
4142 if (nfs4_setup_sequence(calldata->server,
4143 &calldata->arg.seq_args,
4144 &calldata->res.seq_res, 1, task))
4146 rpc_call_start(task);
4149 static const struct rpc_call_ops nfs4_locku_ops = {
4150 .rpc_call_prepare = nfs4_locku_prepare,
4151 .rpc_call_done = nfs4_locku_done,
4152 .rpc_release = nfs4_locku_release_calldata,
4155 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4156 struct nfs_open_context *ctx,
4157 struct nfs4_lock_state *lsp,
4158 struct nfs_seqid *seqid)
4160 struct nfs4_unlockdata *data;
4161 struct rpc_message msg = {
4162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4163 .rpc_cred = ctx->cred,
4165 struct rpc_task_setup task_setup_data = {
4166 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4167 .rpc_message = &msg,
4168 .callback_ops = &nfs4_locku_ops,
4169 .workqueue = nfsiod_workqueue,
4170 .flags = RPC_TASK_ASYNC,
4173 /* Ensure this is an unlock - when canceling a lock, the
4174 * canceled lock is passed in, and it won't be an unlock.
4176 fl->fl_type = F_UNLCK;
4178 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4180 nfs_free_seqid(seqid);
4181 return ERR_PTR(-ENOMEM);
4184 msg.rpc_argp = &data->arg;
4185 msg.rpc_resp = &data->res;
4186 task_setup_data.callback_data = data;
4187 return rpc_run_task(&task_setup_data);
4190 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4192 struct nfs_inode *nfsi = NFS_I(state->inode);
4193 struct nfs_seqid *seqid;
4194 struct nfs4_lock_state *lsp;
4195 struct rpc_task *task;
4197 unsigned char fl_flags = request->fl_flags;
4199 status = nfs4_set_lock_state(state, request);
4200 /* Unlock _before_ we do the RPC call */
4201 request->fl_flags |= FL_EXISTS;
4202 down_read(&nfsi->rwsem);
4203 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4204 up_read(&nfsi->rwsem);
4207 up_read(&nfsi->rwsem);
4210 /* Is this a delegated lock? */
4211 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4213 lsp = request->fl_u.nfs4_fl.owner;
4214 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4218 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4219 status = PTR_ERR(task);
4222 status = nfs4_wait_for_completion_rpc_task(task);
4225 request->fl_flags = fl_flags;
4229 struct nfs4_lockdata {
4230 struct nfs_lock_args arg;
4231 struct nfs_lock_res res;
4232 struct nfs4_lock_state *lsp;
4233 struct nfs_open_context *ctx;
4234 struct file_lock fl;
4235 unsigned long timestamp;
4238 struct nfs_server *server;
4241 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4242 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4245 struct nfs4_lockdata *p;
4246 struct inode *inode = lsp->ls_state->inode;
4247 struct nfs_server *server = NFS_SERVER(inode);
4249 p = kzalloc(sizeof(*p), gfp_mask);
4253 p->arg.fh = NFS_FH(inode);
4255 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4256 if (p->arg.open_seqid == NULL)
4258 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4259 if (p->arg.lock_seqid == NULL)
4260 goto out_free_seqid;
4261 p->arg.lock_stateid = &lsp->ls_stateid;
4262 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4263 p->arg.lock_owner.id = lsp->ls_id.id;
4264 p->arg.lock_owner.s_dev = server->s_dev;
4265 p->res.lock_seqid = p->arg.lock_seqid;
4268 atomic_inc(&lsp->ls_count);
4269 p->ctx = get_nfs_open_context(ctx);
4270 memcpy(&p->fl, fl, sizeof(p->fl));
4273 nfs_free_seqid(p->arg.open_seqid);
4279 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4281 struct nfs4_lockdata *data = calldata;
4282 struct nfs4_state *state = data->lsp->ls_state;
4284 dprintk("%s: begin!\n", __func__);
4285 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4287 /* Do we need to do an open_to_lock_owner? */
4288 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4289 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4291 data->arg.open_stateid = &state->stateid;
4292 data->arg.new_lock_owner = 1;
4293 data->res.open_seqid = data->arg.open_seqid;
4295 data->arg.new_lock_owner = 0;
4296 data->timestamp = jiffies;
4297 if (nfs4_setup_sequence(data->server,
4298 &data->arg.seq_args,
4299 &data->res.seq_res, 1, task))
4301 rpc_call_start(task);
4302 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4305 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4307 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4308 nfs4_lock_prepare(task, calldata);
4311 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4313 struct nfs4_lockdata *data = calldata;
4315 dprintk("%s: begin!\n", __func__);
4317 if (!nfs4_sequence_done(task, &data->res.seq_res))
4320 data->rpc_status = task->tk_status;
4321 if (data->arg.new_lock_owner != 0) {
4322 if (data->rpc_status == 0)
4323 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4327 if (data->rpc_status == 0) {
4328 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4329 sizeof(data->lsp->ls_stateid.data));
4330 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4331 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4334 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4337 static void nfs4_lock_release(void *calldata)
4339 struct nfs4_lockdata *data = calldata;
4341 dprintk("%s: begin!\n", __func__);
4342 nfs_free_seqid(data->arg.open_seqid);
4343 if (data->cancelled != 0) {
4344 struct rpc_task *task;
4345 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4346 data->arg.lock_seqid);
4348 rpc_put_task_async(task);
4349 dprintk("%s: cancelling lock!\n", __func__);
4351 nfs_free_seqid(data->arg.lock_seqid);
4352 nfs4_put_lock_state(data->lsp);
4353 put_nfs_open_context(data->ctx);
4355 dprintk("%s: done!\n", __func__);
4358 static const struct rpc_call_ops nfs4_lock_ops = {
4359 .rpc_call_prepare = nfs4_lock_prepare,
4360 .rpc_call_done = nfs4_lock_done,
4361 .rpc_release = nfs4_lock_release,
4364 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4365 .rpc_call_prepare = nfs4_recover_lock_prepare,
4366 .rpc_call_done = nfs4_lock_done,
4367 .rpc_release = nfs4_lock_release,
4370 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4373 case -NFS4ERR_ADMIN_REVOKED:
4374 case -NFS4ERR_BAD_STATEID:
4375 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4376 if (new_lock_owner != 0 ||
4377 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4378 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4380 case -NFS4ERR_STALE_STATEID:
4381 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4382 case -NFS4ERR_EXPIRED:
4383 nfs4_schedule_lease_recovery(server->nfs_client);
4387 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4389 struct nfs4_lockdata *data;
4390 struct rpc_task *task;
4391 struct rpc_message msg = {
4392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4393 .rpc_cred = state->owner->so_cred,
4395 struct rpc_task_setup task_setup_data = {
4396 .rpc_client = NFS_CLIENT(state->inode),
4397 .rpc_message = &msg,
4398 .callback_ops = &nfs4_lock_ops,
4399 .workqueue = nfsiod_workqueue,
4400 .flags = RPC_TASK_ASYNC,
4404 dprintk("%s: begin!\n", __func__);
4405 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4406 fl->fl_u.nfs4_fl.owner,
4407 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4411 data->arg.block = 1;
4412 if (recovery_type > NFS_LOCK_NEW) {
4413 if (recovery_type == NFS_LOCK_RECLAIM)
4414 data->arg.reclaim = NFS_LOCK_RECLAIM;
4415 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4417 msg.rpc_argp = &data->arg;
4418 msg.rpc_resp = &data->res;
4419 task_setup_data.callback_data = data;
4420 task = rpc_run_task(&task_setup_data);
4422 return PTR_ERR(task);
4423 ret = nfs4_wait_for_completion_rpc_task(task);
4425 ret = data->rpc_status;
4427 nfs4_handle_setlk_error(data->server, data->lsp,
4428 data->arg.new_lock_owner, ret);
4430 data->cancelled = 1;
4432 dprintk("%s: done, ret = %d!\n", __func__, ret);
4436 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4438 struct nfs_server *server = NFS_SERVER(state->inode);
4439 struct nfs4_exception exception = { };
4443 /* Cache the lock if possible... */
4444 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4446 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4447 if (err != -NFS4ERR_DELAY)
4449 nfs4_handle_exception(server, err, &exception);
4450 } while (exception.retry);
4454 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4456 struct nfs_server *server = NFS_SERVER(state->inode);
4457 struct nfs4_exception exception = { };
4460 err = nfs4_set_lock_state(state, request);
4464 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4466 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4470 case -NFS4ERR_GRACE:
4471 case -NFS4ERR_DELAY:
4472 nfs4_handle_exception(server, err, &exception);
4475 } while (exception.retry);
4480 #if defined(CONFIG_NFS_V4_1)
4481 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4484 struct nfs_server *server = NFS_SERVER(state->inode);
4486 status = nfs41_test_stateid(server, state);
4487 if (status == NFS_OK)
4489 nfs41_free_stateid(server, state);
4490 return nfs4_lock_expired(state, request);
4494 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4496 struct nfs_inode *nfsi = NFS_I(state->inode);
4497 unsigned char fl_flags = request->fl_flags;
4498 int status = -ENOLCK;
4500 if ((fl_flags & FL_POSIX) &&
4501 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4503 /* Is this a delegated open? */
4504 status = nfs4_set_lock_state(state, request);
4507 request->fl_flags |= FL_ACCESS;
4508 status = do_vfs_lock(request->fl_file, request);
4511 down_read(&nfsi->rwsem);
4512 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4513 /* Yes: cache locks! */
4514 /* ...but avoid races with delegation recall... */
4515 request->fl_flags = fl_flags & ~FL_SLEEP;
4516 status = do_vfs_lock(request->fl_file, request);
4519 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4522 /* Note: we always want to sleep here! */
4523 request->fl_flags = fl_flags | FL_SLEEP;
4524 if (do_vfs_lock(request->fl_file, request) < 0)
4525 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4527 up_read(&nfsi->rwsem);
4529 request->fl_flags = fl_flags;
4533 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4535 struct nfs4_exception exception = { };
4539 err = _nfs4_proc_setlk(state, cmd, request);
4540 if (err == -NFS4ERR_DENIED)
4542 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4544 } while (exception.retry);
4549 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4551 struct nfs_open_context *ctx;
4552 struct nfs4_state *state;
4553 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4556 /* verify open state */
4557 ctx = nfs_file_open_context(filp);
4560 if (request->fl_start < 0 || request->fl_end < 0)
4563 if (IS_GETLK(cmd)) {
4565 return nfs4_proc_getlk(state, F_GETLK, request);
4569 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4572 if (request->fl_type == F_UNLCK) {
4574 return nfs4_proc_unlck(state, cmd, request);
4581 status = nfs4_proc_setlk(state, cmd, request);
4582 if ((status != -EAGAIN) || IS_SETLK(cmd))
4584 timeout = nfs4_set_lock_task_retry(timeout);
4585 status = -ERESTARTSYS;
4588 } while(status < 0);
4592 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4594 struct nfs_server *server = NFS_SERVER(state->inode);
4595 struct nfs4_exception exception = { };
4598 err = nfs4_set_lock_state(state, fl);
4602 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4605 printk(KERN_ERR "%s: unhandled error %d.\n",
4610 case -NFS4ERR_EXPIRED:
4611 nfs4_schedule_stateid_recovery(server, state);
4612 case -NFS4ERR_STALE_CLIENTID:
4613 case -NFS4ERR_STALE_STATEID:
4614 nfs4_schedule_lease_recovery(server->nfs_client);
4616 case -NFS4ERR_BADSESSION:
4617 case -NFS4ERR_BADSLOT:
4618 case -NFS4ERR_BAD_HIGH_SLOT:
4619 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4620 case -NFS4ERR_DEADSESSION:
4621 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4625 * The show must go on: exit, but mark the
4626 * stateid as needing recovery.
4628 case -NFS4ERR_ADMIN_REVOKED:
4629 case -NFS4ERR_BAD_STATEID:
4630 case -NFS4ERR_OPENMODE:
4631 nfs4_schedule_stateid_recovery(server, state);
4636 * User RPCSEC_GSS context has expired.
4637 * We cannot recover this stateid now, so
4638 * skip it and allow recovery thread to
4644 case -NFS4ERR_DENIED:
4645 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4648 case -NFS4ERR_DELAY:
4651 err = nfs4_handle_exception(server, err, &exception);
4652 } while (exception.retry);
4657 static void nfs4_release_lockowner_release(void *calldata)
4662 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4663 .rpc_release = nfs4_release_lockowner_release,
4666 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4668 struct nfs_server *server = lsp->ls_state->owner->so_server;
4669 struct nfs_release_lockowner_args *args;
4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4674 if (server->nfs_client->cl_mvops->minor_version != 0)
4676 args = kmalloc(sizeof(*args), GFP_NOFS);
4679 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4680 args->lock_owner.id = lsp->ls_id.id;
4681 args->lock_owner.s_dev = server->s_dev;
4682 msg.rpc_argp = args;
4683 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4686 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4688 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4689 const void *buf, size_t buflen,
4690 int flags, int type)
4692 if (strcmp(key, "") != 0)
4695 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4698 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4699 void *buf, size_t buflen, int type)
4701 if (strcmp(key, "") != 0)
4704 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4707 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4708 size_t list_len, const char *name,
4709 size_t name_len, int type)
4711 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4713 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4716 if (list && len <= list_len)
4717 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4722 * nfs_fhget will use either the mounted_on_fileid or the fileid
4724 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4726 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4727 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4728 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4729 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4732 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4733 NFS_ATTR_FATTR_NLINK;
4734 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4738 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4739 struct nfs4_fs_locations *fs_locations, struct page *page)
4741 struct nfs_server *server = NFS_SERVER(dir);
4743 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4745 struct nfs4_fs_locations_arg args = {
4746 .dir_fh = NFS_FH(dir),
4751 struct nfs4_fs_locations_res res = {
4752 .fs_locations = fs_locations,
4754 struct rpc_message msg = {
4755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4761 dprintk("%s: start\n", __func__);
4763 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4764 * is not supported */
4765 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4766 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4768 bitmask[0] |= FATTR4_WORD0_FILEID;
4770 nfs_fattr_init(&fs_locations->fattr);
4771 fs_locations->server = server;
4772 fs_locations->nlocations = 0;
4773 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4774 dprintk("%s: returned status = %d\n", __func__, status);
4778 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4781 struct nfs4_secinfo_arg args = {
4782 .dir_fh = NFS_FH(dir),
4785 struct nfs4_secinfo_res res = {
4788 struct rpc_message msg = {
4789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4794 dprintk("NFS call secinfo %s\n", name->name);
4795 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4796 dprintk("NFS reply secinfo: %d\n", status);
4800 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4802 struct nfs4_exception exception = { };
4805 err = nfs4_handle_exception(NFS_SERVER(dir),
4806 _nfs4_proc_secinfo(dir, name, flavors),
4808 } while (exception.retry);
4812 #ifdef CONFIG_NFS_V4_1
4814 * Check the exchange flags returned by the server for invalid flags, having
4815 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4818 static int nfs4_check_cl_exchange_flags(u32 flags)
4820 if (flags & ~EXCHGID4_FLAG_MASK_R)
4822 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4823 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4825 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4829 return -NFS4ERR_INVAL;
4833 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4835 if (a->server_scope_sz == b->server_scope_sz &&
4836 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4843 * nfs4_proc_exchange_id()
4845 * Since the clientid has expired, all compounds using sessions
4846 * associated with the stale clientid will be returning
4847 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4848 * be in some phase of session reset.
4850 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4852 nfs4_verifier verifier;
4853 struct nfs41_exchange_id_args args = {
4855 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4857 struct nfs41_exchange_id_res res = {
4861 struct rpc_message msg = {
4862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4869 dprintk("--> %s\n", __func__);
4870 BUG_ON(clp == NULL);
4872 p = (u32 *)verifier.data;
4873 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4874 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4875 args.verifier = &verifier;
4877 args.id_len = scnprintf(args.id, sizeof(args.id),
4880 init_utsname()->nodename,
4881 init_utsname()->domainname,
4882 clp->cl_rpcclient->cl_auth->au_flavor);
4884 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4885 if (unlikely(!res.server_scope))
4888 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4890 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4893 if (clp->server_scope &&
4894 !nfs41_same_server_scope(clp->server_scope,
4895 res.server_scope)) {
4896 dprintk("%s: server_scope mismatch detected\n",
4898 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4899 kfree(clp->server_scope);
4900 clp->server_scope = NULL;
4903 if (!clp->server_scope)
4904 clp->server_scope = res.server_scope;
4906 kfree(res.server_scope);
4909 dprintk("<-- %s status= %d\n", __func__, status);
4913 struct nfs4_get_lease_time_data {
4914 struct nfs4_get_lease_time_args *args;
4915 struct nfs4_get_lease_time_res *res;
4916 struct nfs_client *clp;
4919 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4923 struct nfs4_get_lease_time_data *data =
4924 (struct nfs4_get_lease_time_data *)calldata;
4926 dprintk("--> %s\n", __func__);
4927 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4928 /* just setup sequence, do not trigger session recovery
4929 since we're invoked within one */
4930 ret = nfs41_setup_sequence(data->clp->cl_session,
4931 &data->args->la_seq_args,
4932 &data->res->lr_seq_res, 0, task);
4934 BUG_ON(ret == -EAGAIN);
4935 rpc_call_start(task);
4936 dprintk("<-- %s\n", __func__);
4940 * Called from nfs4_state_manager thread for session setup, so don't recover
4941 * from sequence operation or clientid errors.
4943 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4945 struct nfs4_get_lease_time_data *data =
4946 (struct nfs4_get_lease_time_data *)calldata;
4948 dprintk("--> %s\n", __func__);
4949 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4951 switch (task->tk_status) {
4952 case -NFS4ERR_DELAY:
4953 case -NFS4ERR_GRACE:
4954 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4955 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4956 task->tk_status = 0;
4958 case -NFS4ERR_RETRY_UNCACHED_REP:
4959 rpc_restart_call_prepare(task);
4962 dprintk("<-- %s\n", __func__);
4965 struct rpc_call_ops nfs4_get_lease_time_ops = {
4966 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4967 .rpc_call_done = nfs4_get_lease_time_done,
4970 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4972 struct rpc_task *task;
4973 struct nfs4_get_lease_time_args args;
4974 struct nfs4_get_lease_time_res res = {
4975 .lr_fsinfo = fsinfo,
4977 struct nfs4_get_lease_time_data data = {
4982 struct rpc_message msg = {
4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4987 struct rpc_task_setup task_setup = {
4988 .rpc_client = clp->cl_rpcclient,
4989 .rpc_message = &msg,
4990 .callback_ops = &nfs4_get_lease_time_ops,
4991 .callback_data = &data,
4992 .flags = RPC_TASK_TIMEOUT,
4996 dprintk("--> %s\n", __func__);
4997 task = rpc_run_task(&task_setup);
5000 status = PTR_ERR(task);
5002 status = task->tk_status;
5005 dprintk("<-- %s return %d\n", __func__, status);
5011 * Reset a slot table
5013 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5016 struct nfs4_slot *new = NULL;
5020 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5021 max_reqs, tbl->max_slots);
5023 /* Does the newly negotiated max_reqs match the existing slot table? */
5024 if (max_reqs != tbl->max_slots) {
5026 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5033 spin_lock(&tbl->slot_tbl_lock);
5036 tbl->max_slots = max_reqs;
5038 for (i = 0; i < tbl->max_slots; ++i)
5039 tbl->slots[i].seq_nr = ivalue;
5040 spin_unlock(&tbl->slot_tbl_lock);
5041 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5042 tbl, tbl->slots, tbl->max_slots);
5044 dprintk("<-- %s: return %d\n", __func__, ret);
5048 /* Destroy the slot table */
5049 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5051 if (session->fc_slot_table.slots != NULL) {
5052 kfree(session->fc_slot_table.slots);
5053 session->fc_slot_table.slots = NULL;
5055 if (session->bc_slot_table.slots != NULL) {
5056 kfree(session->bc_slot_table.slots);
5057 session->bc_slot_table.slots = NULL;
5063 * Initialize slot table
5065 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5066 int max_slots, int ivalue)
5068 struct nfs4_slot *slot;
5071 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5073 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5075 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5080 spin_lock(&tbl->slot_tbl_lock);
5081 tbl->max_slots = max_slots;
5083 tbl->highest_used_slotid = -1; /* no slot is currently used */
5084 spin_unlock(&tbl->slot_tbl_lock);
5085 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5086 tbl, tbl->slots, tbl->max_slots);
5088 dprintk("<-- %s: return %d\n", __func__, ret);
5093 * Initialize or reset the forechannel and backchannel tables
5095 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5097 struct nfs4_slot_table *tbl;
5100 dprintk("--> %s\n", __func__);
5102 tbl = &ses->fc_slot_table;
5103 if (tbl->slots == NULL) {
5104 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5105 if (status) /* -ENOMEM */
5108 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5113 tbl = &ses->bc_slot_table;
5114 if (tbl->slots == NULL) {
5115 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5117 /* Fore and back channel share a connection so get
5118 * both slot tables or neither */
5119 nfs4_destroy_slot_tables(ses);
5121 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5125 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5127 struct nfs4_session *session;
5128 struct nfs4_slot_table *tbl;
5130 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5134 tbl = &session->fc_slot_table;
5135 tbl->highest_used_slotid = -1;
5136 spin_lock_init(&tbl->slot_tbl_lock);
5137 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5138 init_completion(&tbl->complete);
5140 tbl = &session->bc_slot_table;
5141 tbl->highest_used_slotid = -1;
5142 spin_lock_init(&tbl->slot_tbl_lock);
5143 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5144 init_completion(&tbl->complete);
5146 session->session_state = 1<<NFS4_SESSION_INITING;
5152 void nfs4_destroy_session(struct nfs4_session *session)
5154 nfs4_proc_destroy_session(session);
5155 dprintk("%s Destroy backchannel for xprt %p\n",
5156 __func__, session->clp->cl_rpcclient->cl_xprt);
5157 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5158 NFS41_BC_MIN_CALLBACKS);
5159 nfs4_destroy_slot_tables(session);
5164 * Initialize the values to be used by the client in CREATE_SESSION
5165 * If nfs4_init_session set the fore channel request and response sizes,
5168 * Set the back channel max_resp_sz_cached to zero to force the client to
5169 * always set csa_cachethis to FALSE because the current implementation
5170 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5172 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5174 struct nfs4_session *session = args->client->cl_session;
5175 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5176 mxresp_sz = session->fc_attrs.max_resp_sz;
5179 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5181 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5182 /* Fore channel attributes */
5183 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5184 args->fc_attrs.max_resp_sz = mxresp_sz;
5185 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5186 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5188 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5189 "max_ops=%u max_reqs=%u\n",
5191 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5192 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5194 /* Back channel attributes */
5195 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5196 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5197 args->bc_attrs.max_resp_sz_cached = 0;
5198 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5199 args->bc_attrs.max_reqs = 1;
5201 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5202 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5204 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5205 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5206 args->bc_attrs.max_reqs);
5209 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5211 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5212 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5214 if (rcvd->max_resp_sz > sent->max_resp_sz)
5217 * Our requested max_ops is the minimum we need; we're not
5218 * prepared to break up compounds into smaller pieces than that.
5219 * So, no point even trying to continue if the server won't
5222 if (rcvd->max_ops < sent->max_ops)
5224 if (rcvd->max_reqs == 0)
5229 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5231 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5232 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5234 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5236 if (rcvd->max_resp_sz < sent->max_resp_sz)
5238 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5240 /* These would render the backchannel useless: */
5241 if (rcvd->max_ops == 0)
5243 if (rcvd->max_reqs == 0)
5248 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5249 struct nfs4_session *session)
5253 ret = nfs4_verify_fore_channel_attrs(args, session);
5256 return nfs4_verify_back_channel_attrs(args, session);
5259 static int _nfs4_proc_create_session(struct nfs_client *clp)
5261 struct nfs4_session *session = clp->cl_session;
5262 struct nfs41_create_session_args args = {
5264 .cb_program = NFS4_CALLBACK,
5266 struct nfs41_create_session_res res = {
5269 struct rpc_message msg = {
5270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5276 nfs4_init_channel_attrs(&args);
5277 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5279 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5282 /* Verify the session's negotiated channel_attrs values */
5283 status = nfs4_verify_channel_attrs(&args, session);
5285 /* Increment the clientid slot sequence id */
5293 * Issues a CREATE_SESSION operation to the server.
5294 * It is the responsibility of the caller to verify the session is
5295 * expired before calling this routine.
5297 int nfs4_proc_create_session(struct nfs_client *clp)
5301 struct nfs4_session *session = clp->cl_session;
5303 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5305 status = _nfs4_proc_create_session(clp);
5309 /* Init or reset the session slot tables */
5310 status = nfs4_setup_session_slot_tables(session);
5311 dprintk("slot table setup returned %d\n", status);
5315 ptr = (unsigned *)&session->sess_id.data[0];
5316 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5317 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5319 dprintk("<-- %s\n", __func__);
5324 * Issue the over-the-wire RPC DESTROY_SESSION.
5325 * The caller must serialize access to this routine.
5327 int nfs4_proc_destroy_session(struct nfs4_session *session)
5330 struct rpc_message msg;
5332 dprintk("--> nfs4_proc_destroy_session\n");
5334 /* session is still being setup */
5335 if (session->clp->cl_cons_state != NFS_CS_READY)
5338 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5339 msg.rpc_argp = session;
5340 msg.rpc_resp = NULL;
5341 msg.rpc_cred = NULL;
5342 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5346 "Got error %d from the server on DESTROY_SESSION. "
5347 "Session has been destroyed regardless...\n", status);
5349 dprintk("<-- nfs4_proc_destroy_session\n");
5353 int nfs4_init_session(struct nfs_server *server)
5355 struct nfs_client *clp = server->nfs_client;
5356 struct nfs4_session *session;
5357 unsigned int rsize, wsize;
5360 if (!nfs4_has_session(clp))
5363 session = clp->cl_session;
5364 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5367 rsize = server->rsize;
5369 rsize = NFS_MAX_FILE_IO_SIZE;
5370 wsize = server->wsize;
5372 wsize = NFS_MAX_FILE_IO_SIZE;
5374 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5375 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5377 ret = nfs4_recover_expired_lease(server);
5379 ret = nfs4_check_client_ready(clp);
5383 int nfs4_init_ds_session(struct nfs_client *clp)
5385 struct nfs4_session *session = clp->cl_session;
5388 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5391 ret = nfs4_client_recover_expired_lease(clp);
5393 /* Test for the DS role */
5394 if (!is_ds_client(clp))
5397 ret = nfs4_check_client_ready(clp);
5401 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5405 * Renew the cl_session lease.
5407 struct nfs4_sequence_data {
5408 struct nfs_client *clp;
5409 struct nfs4_sequence_args args;
5410 struct nfs4_sequence_res res;
5413 static void nfs41_sequence_release(void *data)
5415 struct nfs4_sequence_data *calldata = data;
5416 struct nfs_client *clp = calldata->clp;
5418 if (atomic_read(&clp->cl_count) > 1)
5419 nfs4_schedule_state_renewal(clp);
5420 nfs_put_client(clp);
5424 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5426 switch(task->tk_status) {
5427 case -NFS4ERR_DELAY:
5428 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5431 nfs4_schedule_lease_recovery(clp);
5436 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5438 struct nfs4_sequence_data *calldata = data;
5439 struct nfs_client *clp = calldata->clp;
5441 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5444 if (task->tk_status < 0) {
5445 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5446 if (atomic_read(&clp->cl_count) == 1)
5449 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5450 rpc_restart_call_prepare(task);
5454 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5456 dprintk("<-- %s\n", __func__);
5459 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5461 struct nfs4_sequence_data *calldata = data;
5462 struct nfs_client *clp = calldata->clp;
5463 struct nfs4_sequence_args *args;
5464 struct nfs4_sequence_res *res;
5466 args = task->tk_msg.rpc_argp;
5467 res = task->tk_msg.rpc_resp;
5469 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5471 rpc_call_start(task);
5474 static const struct rpc_call_ops nfs41_sequence_ops = {
5475 .rpc_call_done = nfs41_sequence_call_done,
5476 .rpc_call_prepare = nfs41_sequence_prepare,
5477 .rpc_release = nfs41_sequence_release,
5480 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5482 struct nfs4_sequence_data *calldata;
5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5487 struct rpc_task_setup task_setup_data = {
5488 .rpc_client = clp->cl_rpcclient,
5489 .rpc_message = &msg,
5490 .callback_ops = &nfs41_sequence_ops,
5491 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5494 if (!atomic_inc_not_zero(&clp->cl_count))
5495 return ERR_PTR(-EIO);
5496 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5497 if (calldata == NULL) {
5498 nfs_put_client(clp);
5499 return ERR_PTR(-ENOMEM);
5501 msg.rpc_argp = &calldata->args;
5502 msg.rpc_resp = &calldata->res;
5503 calldata->clp = clp;
5504 task_setup_data.callback_data = calldata;
5506 return rpc_run_task(&task_setup_data);
5509 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5511 struct rpc_task *task;
5514 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5516 task = _nfs41_proc_sequence(clp, cred);
5518 ret = PTR_ERR(task);
5520 rpc_put_task_async(task);
5521 dprintk("<-- %s status=%d\n", __func__, ret);
5525 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5527 struct rpc_task *task;
5530 task = _nfs41_proc_sequence(clp, cred);
5532 ret = PTR_ERR(task);
5535 ret = rpc_wait_for_completion_task(task);
5537 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5539 if (task->tk_status == 0)
5540 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5541 ret = task->tk_status;
5545 dprintk("<-- %s status=%d\n", __func__, ret);
5549 struct nfs4_reclaim_complete_data {
5550 struct nfs_client *clp;
5551 struct nfs41_reclaim_complete_args arg;
5552 struct nfs41_reclaim_complete_res res;
5555 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5557 struct nfs4_reclaim_complete_data *calldata = data;
5559 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5560 if (nfs41_setup_sequence(calldata->clp->cl_session,
5561 &calldata->arg.seq_args,
5562 &calldata->res.seq_res, 0, task))
5565 rpc_call_start(task);
5568 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5570 switch(task->tk_status) {
5572 case -NFS4ERR_COMPLETE_ALREADY:
5573 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5575 case -NFS4ERR_DELAY:
5576 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5578 case -NFS4ERR_RETRY_UNCACHED_REP:
5581 nfs4_schedule_lease_recovery(clp);
5586 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5588 struct nfs4_reclaim_complete_data *calldata = data;
5589 struct nfs_client *clp = calldata->clp;
5590 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5592 dprintk("--> %s\n", __func__);
5593 if (!nfs41_sequence_done(task, res))
5596 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5597 rpc_restart_call_prepare(task);
5600 dprintk("<-- %s\n", __func__);
5603 static void nfs4_free_reclaim_complete_data(void *data)
5605 struct nfs4_reclaim_complete_data *calldata = data;
5610 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5611 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5612 .rpc_call_done = nfs4_reclaim_complete_done,
5613 .rpc_release = nfs4_free_reclaim_complete_data,
5617 * Issue a global reclaim complete.
5619 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5621 struct nfs4_reclaim_complete_data *calldata;
5622 struct rpc_task *task;
5623 struct rpc_message msg = {
5624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5626 struct rpc_task_setup task_setup_data = {
5627 .rpc_client = clp->cl_rpcclient,
5628 .rpc_message = &msg,
5629 .callback_ops = &nfs4_reclaim_complete_call_ops,
5630 .flags = RPC_TASK_ASYNC,
5632 int status = -ENOMEM;
5634 dprintk("--> %s\n", __func__);
5635 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5636 if (calldata == NULL)
5638 calldata->clp = clp;
5639 calldata->arg.one_fs = 0;
5641 msg.rpc_argp = &calldata->arg;
5642 msg.rpc_resp = &calldata->res;
5643 task_setup_data.callback_data = calldata;
5644 task = rpc_run_task(&task_setup_data);
5646 status = PTR_ERR(task);
5649 status = nfs4_wait_for_completion_rpc_task(task);
5651 status = task->tk_status;
5655 dprintk("<-- %s status=%d\n", __func__, status);
5660 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5662 struct nfs4_layoutget *lgp = calldata;
5663 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5665 dprintk("--> %s\n", __func__);
5666 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5667 * right now covering the LAYOUTGET we are about to send.
5668 * However, that is not so catastrophic, and there seems
5669 * to be no way to prevent it completely.
5671 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5672 &lgp->res.seq_res, 0, task))
5674 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5675 NFS_I(lgp->args.inode)->layout,
5676 lgp->args.ctx->state)) {
5677 rpc_exit(task, NFS4_OK);
5680 rpc_call_start(task);
5683 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5685 struct nfs4_layoutget *lgp = calldata;
5686 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5688 dprintk("--> %s\n", __func__);
5690 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5693 switch (task->tk_status) {
5696 case -NFS4ERR_LAYOUTTRYLATER:
5697 case -NFS4ERR_RECALLCONFLICT:
5698 task->tk_status = -NFS4ERR_DELAY;
5701 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5702 rpc_restart_call_prepare(task);
5706 dprintk("<-- %s\n", __func__);
5709 static void nfs4_layoutget_release(void *calldata)
5711 struct nfs4_layoutget *lgp = calldata;
5713 dprintk("--> %s\n", __func__);
5714 put_nfs_open_context(lgp->args.ctx);
5716 dprintk("<-- %s\n", __func__);
5719 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5720 .rpc_call_prepare = nfs4_layoutget_prepare,
5721 .rpc_call_done = nfs4_layoutget_done,
5722 .rpc_release = nfs4_layoutget_release,
5725 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5727 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5728 struct rpc_task *task;
5729 struct rpc_message msg = {
5730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5731 .rpc_argp = &lgp->args,
5732 .rpc_resp = &lgp->res,
5734 struct rpc_task_setup task_setup_data = {
5735 .rpc_client = server->client,
5736 .rpc_message = &msg,
5737 .callback_ops = &nfs4_layoutget_call_ops,
5738 .callback_data = lgp,
5739 .flags = RPC_TASK_ASYNC,
5743 dprintk("--> %s\n", __func__);
5745 lgp->res.layoutp = &lgp->args.layout;
5746 lgp->res.seq_res.sr_slot = NULL;
5747 task = rpc_run_task(&task_setup_data);
5749 return PTR_ERR(task);
5750 status = nfs4_wait_for_completion_rpc_task(task);
5752 status = task->tk_status;
5754 status = pnfs_layout_process(lgp);
5756 dprintk("<-- %s status=%d\n", __func__, status);
5761 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5763 struct nfs4_layoutreturn *lrp = calldata;
5765 dprintk("--> %s\n", __func__);
5766 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5767 &lrp->res.seq_res, 0, task))
5769 rpc_call_start(task);
5772 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5774 struct nfs4_layoutreturn *lrp = calldata;
5775 struct nfs_server *server;
5776 struct pnfs_layout_hdr *lo = lrp->args.layout;
5778 dprintk("--> %s\n", __func__);
5780 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5783 server = NFS_SERVER(lrp->args.inode);
5784 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5785 rpc_restart_call_prepare(task);
5788 spin_lock(&lo->plh_inode->i_lock);
5789 if (task->tk_status == 0) {
5790 if (lrp->res.lrs_present) {
5791 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5793 BUG_ON(!list_empty(&lo->plh_segs));
5795 lo->plh_block_lgets--;
5796 spin_unlock(&lo->plh_inode->i_lock);
5797 dprintk("<-- %s\n", __func__);
5800 static void nfs4_layoutreturn_release(void *calldata)
5802 struct nfs4_layoutreturn *lrp = calldata;
5804 dprintk("--> %s\n", __func__);
5805 put_layout_hdr(lrp->args.layout);
5807 dprintk("<-- %s\n", __func__);
5810 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5811 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5812 .rpc_call_done = nfs4_layoutreturn_done,
5813 .rpc_release = nfs4_layoutreturn_release,
5816 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5818 struct rpc_task *task;
5819 struct rpc_message msg = {
5820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5821 .rpc_argp = &lrp->args,
5822 .rpc_resp = &lrp->res,
5824 struct rpc_task_setup task_setup_data = {
5825 .rpc_client = lrp->clp->cl_rpcclient,
5826 .rpc_message = &msg,
5827 .callback_ops = &nfs4_layoutreturn_call_ops,
5828 .callback_data = lrp,
5832 dprintk("--> %s\n", __func__);
5833 task = rpc_run_task(&task_setup_data);
5835 return PTR_ERR(task);
5836 status = task->tk_status;
5837 dprintk("<-- %s status=%d\n", __func__, status);
5843 * Retrieve the list of Data Server devices from the MDS.
5845 static int _nfs4_getdevicelist(struct nfs_server *server,
5846 const struct nfs_fh *fh,
5847 struct pnfs_devicelist *devlist)
5849 struct nfs4_getdevicelist_args args = {
5851 .layoutclass = server->pnfs_curr_ld->id,
5853 struct nfs4_getdevicelist_res res = {
5856 struct rpc_message msg = {
5857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5863 dprintk("--> %s\n", __func__);
5864 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5866 dprintk("<-- %s status=%d\n", __func__, status);
5870 int nfs4_proc_getdevicelist(struct nfs_server *server,
5871 const struct nfs_fh *fh,
5872 struct pnfs_devicelist *devlist)
5874 struct nfs4_exception exception = { };
5878 err = nfs4_handle_exception(server,
5879 _nfs4_getdevicelist(server, fh, devlist),
5881 } while (exception.retry);
5883 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5884 err, devlist->num_devs);
5888 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5891 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5893 struct nfs4_getdeviceinfo_args args = {
5896 struct nfs4_getdeviceinfo_res res = {
5899 struct rpc_message msg = {
5900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5906 dprintk("--> %s\n", __func__);
5907 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5908 dprintk("<-- %s status=%d\n", __func__, status);
5913 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5915 struct nfs4_exception exception = { };
5919 err = nfs4_handle_exception(server,
5920 _nfs4_proc_getdeviceinfo(server, pdev),
5922 } while (exception.retry);
5925 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5927 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5929 struct nfs4_layoutcommit_data *data = calldata;
5930 struct nfs_server *server = NFS_SERVER(data->args.inode);
5932 if (nfs4_setup_sequence(server, &data->args.seq_args,
5933 &data->res.seq_res, 1, task))
5935 rpc_call_start(task);
5939 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5941 struct nfs4_layoutcommit_data *data = calldata;
5942 struct nfs_server *server = NFS_SERVER(data->args.inode);
5944 if (!nfs4_sequence_done(task, &data->res.seq_res))
5947 switch (task->tk_status) { /* Just ignore these failures */
5948 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5949 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5950 case NFS4ERR_BADLAYOUT: /* no layout */
5951 case NFS4ERR_GRACE: /* loca_recalim always false */
5952 task->tk_status = 0;
5955 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5956 rpc_restart_call_prepare(task);
5960 if (task->tk_status == 0)
5961 nfs_post_op_update_inode_force_wcc(data->args.inode,
5965 static void nfs4_layoutcommit_release(void *calldata)
5967 struct nfs4_layoutcommit_data *data = calldata;
5968 struct pnfs_layout_segment *lseg, *tmp;
5969 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
5971 pnfs_cleanup_layoutcommit(data);
5972 /* Matched by references in pnfs_set_layoutcommit */
5973 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
5974 list_del_init(&lseg->pls_lc_list);
5975 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
5980 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
5981 smp_mb__after_clear_bit();
5982 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
5984 put_rpccred(data->cred);
5988 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
5989 .rpc_call_prepare = nfs4_layoutcommit_prepare,
5990 .rpc_call_done = nfs4_layoutcommit_done,
5991 .rpc_release = nfs4_layoutcommit_release,
5995 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
5997 struct rpc_message msg = {
5998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
5999 .rpc_argp = &data->args,
6000 .rpc_resp = &data->res,
6001 .rpc_cred = data->cred,
6003 struct rpc_task_setup task_setup_data = {
6004 .task = &data->task,
6005 .rpc_client = NFS_CLIENT(data->args.inode),
6006 .rpc_message = &msg,
6007 .callback_ops = &nfs4_layoutcommit_ops,
6008 .callback_data = data,
6009 .flags = RPC_TASK_ASYNC,
6011 struct rpc_task *task;
6014 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6015 "lbw: %llu inode %lu\n",
6016 data->task.tk_pid, sync,
6017 data->args.lastbytewritten,
6018 data->args.inode->i_ino);
6020 task = rpc_run_task(&task_setup_data);
6022 return PTR_ERR(task);
6025 status = nfs4_wait_for_completion_rpc_task(task);
6028 status = task->tk_status;
6030 dprintk("%s: status %d\n", __func__, status);
6036 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6037 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6039 struct nfs41_secinfo_no_name_args args = {
6040 .style = SECINFO_STYLE_CURRENT_FH,
6042 struct nfs4_secinfo_res res = {
6045 struct rpc_message msg = {
6046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6050 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6054 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6055 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6057 struct nfs4_exception exception = { };
6060 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6063 case -NFS4ERR_WRONGSEC:
6064 case -NFS4ERR_NOTSUPP:
6067 err = nfs4_handle_exception(server, err, &exception);
6069 } while (exception.retry);
6074 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6075 struct nfs_fsinfo *info)
6079 rpc_authflavor_t flavor;
6080 struct nfs4_secinfo_flavors *flavors;
6082 page = alloc_page(GFP_KERNEL);
6088 flavors = page_address(page);
6089 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6092 * Fall back on "guess and check" method if
6093 * the server doesn't support SECINFO_NO_NAME
6095 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6096 err = nfs4_find_root_sec(server, fhandle, info);
6102 flavor = nfs_find_best_sec(flavors);
6104 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6113 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6116 struct nfs41_test_stateid_args args = {
6117 .stateid = &state->stateid,
6119 struct nfs41_test_stateid_res res;
6120 struct rpc_message msg = {
6121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6125 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6126 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6130 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6132 struct nfs4_exception exception = { };
6135 err = nfs4_handle_exception(server,
6136 _nfs41_test_stateid(server, state),
6138 } while (exception.retry);
6142 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6145 struct nfs41_free_stateid_args args = {
6146 .stateid = &state->stateid,
6148 struct nfs41_free_stateid_res res;
6149 struct rpc_message msg = {
6150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6155 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6156 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6160 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6162 struct nfs4_exception exception = { };
6165 err = nfs4_handle_exception(server,
6166 _nfs4_free_stateid(server, state),
6168 } while (exception.retry);
6171 #endif /* CONFIG_NFS_V4_1 */
6173 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6174 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6175 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6176 .recover_open = nfs4_open_reclaim,
6177 .recover_lock = nfs4_lock_reclaim,
6178 .establish_clid = nfs4_init_clientid,
6179 .get_clid_cred = nfs4_get_setclientid_cred,
6182 #if defined(CONFIG_NFS_V4_1)
6183 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6184 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6185 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6186 .recover_open = nfs4_open_reclaim,
6187 .recover_lock = nfs4_lock_reclaim,
6188 .establish_clid = nfs41_init_clientid,
6189 .get_clid_cred = nfs4_get_exchange_id_cred,
6190 .reclaim_complete = nfs41_proc_reclaim_complete,
6192 #endif /* CONFIG_NFS_V4_1 */
6194 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6195 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6196 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6197 .recover_open = nfs4_open_expired,
6198 .recover_lock = nfs4_lock_expired,
6199 .establish_clid = nfs4_init_clientid,
6200 .get_clid_cred = nfs4_get_setclientid_cred,
6203 #if defined(CONFIG_NFS_V4_1)
6204 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6205 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6206 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6207 .recover_open = nfs41_open_expired,
6208 .recover_lock = nfs41_lock_expired,
6209 .establish_clid = nfs41_init_clientid,
6210 .get_clid_cred = nfs4_get_exchange_id_cred,
6212 #endif /* CONFIG_NFS_V4_1 */
6214 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6215 .sched_state_renewal = nfs4_proc_async_renew,
6216 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6217 .renew_lease = nfs4_proc_renew,
6220 #if defined(CONFIG_NFS_V4_1)
6221 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6222 .sched_state_renewal = nfs41_proc_async_sequence,
6223 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6224 .renew_lease = nfs4_proc_sequence,
6228 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6230 .call_sync = _nfs4_call_sync,
6231 .validate_stateid = nfs4_validate_delegation_stateid,
6232 .find_root_sec = nfs4_find_root_sec,
6233 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6234 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6235 .state_renewal_ops = &nfs40_state_renewal_ops,
6238 #if defined(CONFIG_NFS_V4_1)
6239 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6241 .call_sync = _nfs4_call_sync_session,
6242 .validate_stateid = nfs41_validate_delegation_stateid,
6243 .find_root_sec = nfs41_find_root_sec,
6244 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6245 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6246 .state_renewal_ops = &nfs41_state_renewal_ops,
6250 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6251 [0] = &nfs_v4_0_minor_ops,
6252 #if defined(CONFIG_NFS_V4_1)
6253 [1] = &nfs_v4_1_minor_ops,
6257 static const struct inode_operations nfs4_file_inode_operations = {
6258 .permission = nfs_permission,
6259 .getattr = nfs_getattr,
6260 .setattr = nfs_setattr,
6261 .getxattr = generic_getxattr,
6262 .setxattr = generic_setxattr,
6263 .listxattr = generic_listxattr,
6264 .removexattr = generic_removexattr,
6267 const struct nfs_rpc_ops nfs_v4_clientops = {
6268 .version = 4, /* protocol version */
6269 .dentry_ops = &nfs4_dentry_operations,
6270 .dir_inode_ops = &nfs4_dir_inode_operations,
6271 .file_inode_ops = &nfs4_file_inode_operations,
6272 .file_ops = &nfs4_file_operations,
6273 .getroot = nfs4_proc_get_root,
6274 .getattr = nfs4_proc_getattr,
6275 .setattr = nfs4_proc_setattr,
6276 .lookup = nfs4_proc_lookup,
6277 .access = nfs4_proc_access,
6278 .readlink = nfs4_proc_readlink,
6279 .create = nfs4_proc_create,
6280 .remove = nfs4_proc_remove,
6281 .unlink_setup = nfs4_proc_unlink_setup,
6282 .unlink_done = nfs4_proc_unlink_done,
6283 .rename = nfs4_proc_rename,
6284 .rename_setup = nfs4_proc_rename_setup,
6285 .rename_done = nfs4_proc_rename_done,
6286 .link = nfs4_proc_link,
6287 .symlink = nfs4_proc_symlink,
6288 .mkdir = nfs4_proc_mkdir,
6289 .rmdir = nfs4_proc_remove,
6290 .readdir = nfs4_proc_readdir,
6291 .mknod = nfs4_proc_mknod,
6292 .statfs = nfs4_proc_statfs,
6293 .fsinfo = nfs4_proc_fsinfo,
6294 .pathconf = nfs4_proc_pathconf,
6295 .set_capabilities = nfs4_server_capabilities,
6296 .decode_dirent = nfs4_decode_dirent,
6297 .read_setup = nfs4_proc_read_setup,
6298 .read_done = nfs4_read_done,
6299 .write_setup = nfs4_proc_write_setup,
6300 .write_done = nfs4_write_done,
6301 .commit_setup = nfs4_proc_commit_setup,
6302 .commit_done = nfs4_commit_done,
6303 .lock = nfs4_proc_lock,
6304 .clear_acl_cache = nfs4_zap_acl_attr,
6305 .close_context = nfs4_close_context,
6306 .open_context = nfs4_atomic_open,
6307 .init_client = nfs4_init_client,
6308 .secinfo = nfs4_proc_secinfo,
6311 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6312 .prefix = XATTR_NAME_NFSV4_ACL,
6313 .list = nfs4_xattr_list_nfs4_acl,
6314 .get = nfs4_xattr_get_nfs4_acl,
6315 .set = nfs4_xattr_set_nfs4_acl,
6318 const struct xattr_handler *nfs4_xattr_handlers[] = {
6319 &nfs4_xattr_nfs4_acl_handler,