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/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
52 #include <linux/xattr.h>
53 #include <linux/utsname.h>
56 #include "delegation.h"
62 #define NFSDBG_FACILITY NFSDBG_PROC
64 #define NFS4_POLL_RETRY_MIN (HZ/10)
65 #define NFS4_POLL_RETRY_MAX (15*HZ)
67 #define NFS4_MAX_LOOP_ON_RECOVER (10)
70 static int _nfs4_proc_open(struct nfs4_opendata *data);
71 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
72 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
73 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
74 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
75 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
76 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
77 struct nfs_fattr *fattr, struct iattr *sattr,
78 struct nfs4_state *state);
80 /* Prevent leaks of NFSv4 errors into userland */
81 static int nfs4_map_errors(int err)
86 case -NFS4ERR_RESOURCE:
88 case -NFS4ERR_BADOWNER:
89 case -NFS4ERR_BADNAME:
92 dprintk("%s could not handle NFSv4 error %d\n",
100 * This is our standard bitmap for GETATTR requests.
102 const u32 nfs4_fattr_bitmap[2] = {
104 | FATTR4_WORD0_CHANGE
107 | FATTR4_WORD0_FILEID,
109 | FATTR4_WORD1_NUMLINKS
111 | FATTR4_WORD1_OWNER_GROUP
112 | FATTR4_WORD1_RAWDEV
113 | FATTR4_WORD1_SPACE_USED
114 | FATTR4_WORD1_TIME_ACCESS
115 | FATTR4_WORD1_TIME_METADATA
116 | FATTR4_WORD1_TIME_MODIFY
119 const u32 nfs4_statfs_bitmap[2] = {
120 FATTR4_WORD0_FILES_AVAIL
121 | FATTR4_WORD0_FILES_FREE
122 | FATTR4_WORD0_FILES_TOTAL,
123 FATTR4_WORD1_SPACE_AVAIL
124 | FATTR4_WORD1_SPACE_FREE
125 | FATTR4_WORD1_SPACE_TOTAL
128 const u32 nfs4_pathconf_bitmap[2] = {
130 | FATTR4_WORD0_MAXNAME,
134 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
135 | FATTR4_WORD0_MAXREAD
136 | FATTR4_WORD0_MAXWRITE
137 | FATTR4_WORD0_LEASE_TIME,
138 FATTR4_WORD1_TIME_DELTA
139 | FATTR4_WORD1_FS_LAYOUT_TYPES
142 const u32 nfs4_fs_locations_bitmap[2] = {
144 | FATTR4_WORD0_CHANGE
147 | FATTR4_WORD0_FILEID
148 | FATTR4_WORD0_FS_LOCATIONS,
150 | FATTR4_WORD1_NUMLINKS
152 | FATTR4_WORD1_OWNER_GROUP
153 | FATTR4_WORD1_RAWDEV
154 | FATTR4_WORD1_SPACE_USED
155 | FATTR4_WORD1_TIME_ACCESS
156 | FATTR4_WORD1_TIME_METADATA
157 | FATTR4_WORD1_TIME_MODIFY
158 | FATTR4_WORD1_MOUNTED_ON_FILEID
161 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
162 struct nfs4_readdir_arg *readdir)
166 BUG_ON(readdir->count < 80);
168 readdir->cookie = cookie;
169 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
174 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
179 * NFSv4 servers do not return entries for '.' and '..'
180 * Therefore, we fake these entries here. We let '.'
181 * have cookie 0 and '..' have cookie 1. Note that
182 * when talking to the server, we always send cookie 0
185 start = p = kmap_atomic(*readdir->pages, KM_USER0);
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_one; /* cookie, second word */
191 *p++ = xdr_one; /* entry len */
192 memcpy(p, ".\0\0\0", 4); /* entry */
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
200 *p++ = xdr_one; /* next */
201 *p++ = xdr_zero; /* cookie, first word */
202 *p++ = xdr_two; /* cookie, second word */
203 *p++ = xdr_two; /* entry len */
204 memcpy(p, "..\0\0", 4); /* entry */
206 *p++ = xdr_one; /* bitmap length */
207 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
208 *p++ = htonl(8); /* attribute buffer length */
209 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
211 readdir->pgbase = (char *)p - (char *)start;
212 readdir->count -= readdir->pgbase;
213 kunmap_atomic(start, KM_USER0);
216 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
222 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
223 nfs_wait_bit_killable, TASK_KILLABLE);
227 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
234 *timeout = NFS4_POLL_RETRY_MIN;
235 if (*timeout > NFS4_POLL_RETRY_MAX)
236 *timeout = NFS4_POLL_RETRY_MAX;
237 schedule_timeout_killable(*timeout);
238 if (fatal_signal_pending(current))
244 /* This is the error handling routine for processes that are allowed
247 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
249 struct nfs_client *clp = server->nfs_client;
250 struct nfs4_state *state = exception->state;
253 exception->retry = 0;
257 case -NFS4ERR_ADMIN_REVOKED:
258 case -NFS4ERR_BAD_STATEID:
259 case -NFS4ERR_OPENMODE:
262 nfs4_schedule_stateid_recovery(server, state);
263 goto wait_on_recovery;
264 case -NFS4ERR_STALE_STATEID:
265 case -NFS4ERR_STALE_CLIENTID:
266 case -NFS4ERR_EXPIRED:
267 nfs4_schedule_lease_recovery(clp);
268 goto wait_on_recovery;
269 #if defined(CONFIG_NFS_V4_1)
270 case -NFS4ERR_BADSESSION:
271 case -NFS4ERR_BADSLOT:
272 case -NFS4ERR_BAD_HIGH_SLOT:
273 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
274 case -NFS4ERR_DEADSESSION:
275 case -NFS4ERR_SEQ_FALSE_RETRY:
276 case -NFS4ERR_SEQ_MISORDERED:
277 dprintk("%s ERROR: %d Reset session\n", __func__,
279 nfs4_schedule_session_recovery(clp->cl_session);
280 exception->retry = 1;
282 #endif /* defined(CONFIG_NFS_V4_1) */
283 case -NFS4ERR_FILE_OPEN:
284 if (exception->timeout > HZ) {
285 /* We have retried a decent amount, time to
294 ret = nfs4_delay(server->client, &exception->timeout);
297 case -NFS4ERR_OLD_STATEID:
298 exception->retry = 1;
300 /* We failed to handle the error */
301 return nfs4_map_errors(ret);
303 ret = nfs4_wait_clnt_recover(clp);
305 exception->retry = 1;
310 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
312 spin_lock(&clp->cl_lock);
313 if (time_before(clp->cl_last_renewal,timestamp))
314 clp->cl_last_renewal = timestamp;
315 spin_unlock(&clp->cl_lock);
318 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
320 do_renew_lease(server->nfs_client, timestamp);
323 #if defined(CONFIG_NFS_V4_1)
326 * nfs4_free_slot - free a slot and efficiently update slot table.
328 * freeing a slot is trivially done by clearing its respective bit
330 * If the freed slotid equals highest_used_slotid we want to update it
331 * so that the server would be able to size down the slot table if needed,
332 * otherwise we know that the highest_used_slotid is still in use.
333 * When updating highest_used_slotid there may be "holes" in the bitmap
334 * so we need to scan down from highest_used_slotid to 0 looking for the now
335 * highest slotid in use.
336 * If none found, highest_used_slotid is set to -1.
338 * Must be called while holding tbl->slot_tbl_lock
341 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
343 int free_slotid = free_slot - tbl->slots;
344 int slotid = free_slotid;
346 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
347 /* clear used bit in bitmap */
348 __clear_bit(slotid, tbl->used_slots);
350 /* update highest_used_slotid when it is freed */
351 if (slotid == tbl->highest_used_slotid) {
352 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
353 if (slotid < tbl->max_slots)
354 tbl->highest_used_slotid = slotid;
356 tbl->highest_used_slotid = -1;
358 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
359 free_slotid, tbl->highest_used_slotid);
363 * Signal state manager thread if session fore channel is drained
365 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
367 struct rpc_task *task;
369 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
370 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
372 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
376 if (ses->fc_slot_table.highest_used_slotid != -1)
379 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
380 complete(&ses->fc_slot_table.complete);
384 * Signal state manager thread if session back channel is drained
386 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
388 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
389 ses->bc_slot_table.highest_used_slotid != -1)
391 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
392 complete(&ses->bc_slot_table.complete);
395 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
397 struct nfs4_slot_table *tbl;
399 tbl = &res->sr_session->fc_slot_table;
401 /* just wake up the next guy waiting since
402 * we may have not consumed a slot after all */
403 dprintk("%s: No slot\n", __func__);
407 spin_lock(&tbl->slot_tbl_lock);
408 nfs4_free_slot(tbl, res->sr_slot);
409 nfs4_check_drain_fc_complete(res->sr_session);
410 spin_unlock(&tbl->slot_tbl_lock);
414 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
416 unsigned long timestamp;
417 struct nfs_client *clp;
420 * sr_status remains 1 if an RPC level error occurred. The server
421 * may or may not have processed the sequence operation..
422 * Proceed as if the server received and processed the sequence
425 if (res->sr_status == 1)
426 res->sr_status = NFS_OK;
428 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
432 /* Check the SEQUENCE operation status */
433 switch (res->sr_status) {
435 /* Update the slot's sequence and clientid lease timer */
436 ++res->sr_slot->seq_nr;
437 timestamp = res->sr_renewal_time;
438 clp = res->sr_session->clp;
439 do_renew_lease(clp, timestamp);
440 /* Check sequence flags */
441 if (res->sr_status_flags != 0)
442 nfs4_schedule_lease_recovery(clp);
445 /* The server detected a resend of the RPC call and
446 * returned NFS4ERR_DELAY as per Section 2.10.6.2
449 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
451 res->sr_slot - res->sr_session->fc_slot_table.slots,
452 res->sr_slot->seq_nr);
455 /* Just update the slot sequence no. */
456 ++res->sr_slot->seq_nr;
459 /* The session may be reset by one of the error handlers. */
460 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
461 nfs41_sequence_free_slot(res);
464 if (!rpc_restart_call(task))
466 rpc_delay(task, NFS4_POLL_RETRY_MAX);
470 static int nfs4_sequence_done(struct rpc_task *task,
471 struct nfs4_sequence_res *res)
473 if (res->sr_session == NULL)
475 return nfs41_sequence_done(task, res);
479 * nfs4_find_slot - efficiently look for a free slot
481 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
482 * If found, we mark the slot as used, update the highest_used_slotid,
483 * and respectively set up the sequence operation args.
484 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
486 * Note: must be called with under the slot_tbl_lock.
489 nfs4_find_slot(struct nfs4_slot_table *tbl)
492 u8 ret_id = NFS4_MAX_SLOT_TABLE;
493 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
495 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
496 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
498 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
499 if (slotid >= tbl->max_slots)
501 __set_bit(slotid, tbl->used_slots);
502 if (slotid > tbl->highest_used_slotid)
503 tbl->highest_used_slotid = slotid;
506 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
507 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
511 int nfs41_setup_sequence(struct nfs4_session *session,
512 struct nfs4_sequence_args *args,
513 struct nfs4_sequence_res *res,
515 struct rpc_task *task)
517 struct nfs4_slot *slot;
518 struct nfs4_slot_table *tbl;
521 dprintk("--> %s\n", __func__);
522 /* slot already allocated? */
523 if (res->sr_slot != NULL)
526 tbl = &session->fc_slot_table;
528 spin_lock(&tbl->slot_tbl_lock);
529 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
530 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
532 * The state manager will wait until the slot table is empty.
533 * Schedule the reset thread
535 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
536 spin_unlock(&tbl->slot_tbl_lock);
537 dprintk("%s Schedule Session Reset\n", __func__);
541 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
542 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
543 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
544 spin_unlock(&tbl->slot_tbl_lock);
545 dprintk("%s enforce FIFO order\n", __func__);
549 slotid = nfs4_find_slot(tbl);
550 if (slotid == NFS4_MAX_SLOT_TABLE) {
551 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
552 spin_unlock(&tbl->slot_tbl_lock);
553 dprintk("<-- %s: no free slots\n", __func__);
556 spin_unlock(&tbl->slot_tbl_lock);
558 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
559 slot = tbl->slots + slotid;
560 args->sa_session = session;
561 args->sa_slotid = slotid;
562 args->sa_cache_this = cache_reply;
564 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
566 res->sr_session = session;
568 res->sr_renewal_time = jiffies;
569 res->sr_status_flags = 0;
571 * sr_status is only set in decode_sequence, and so will remain
572 * set to 1 if an rpc level failure occurs.
577 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
579 int nfs4_setup_sequence(const struct nfs_server *server,
580 struct nfs4_sequence_args *args,
581 struct nfs4_sequence_res *res,
583 struct rpc_task *task)
585 struct nfs4_session *session = nfs4_get_session(server);
588 if (session == NULL) {
589 args->sa_session = NULL;
590 res->sr_session = NULL;
594 dprintk("--> %s clp %p session %p sr_slot %td\n",
595 __func__, session->clp, session, res->sr_slot ?
596 res->sr_slot - session->fc_slot_table.slots : -1);
598 ret = nfs41_setup_sequence(session, args, res, cache_reply,
601 dprintk("<-- %s status=%d\n", __func__, ret);
605 struct nfs41_call_sync_data {
606 const struct nfs_server *seq_server;
607 struct nfs4_sequence_args *seq_args;
608 struct nfs4_sequence_res *seq_res;
612 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
614 struct nfs41_call_sync_data *data = calldata;
616 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
618 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
619 data->seq_res, data->cache_reply, task))
621 rpc_call_start(task);
624 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
626 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
627 nfs41_call_sync_prepare(task, calldata);
630 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
632 struct nfs41_call_sync_data *data = calldata;
634 nfs41_sequence_done(task, data->seq_res);
637 struct rpc_call_ops nfs41_call_sync_ops = {
638 .rpc_call_prepare = nfs41_call_sync_prepare,
639 .rpc_call_done = nfs41_call_sync_done,
642 struct rpc_call_ops nfs41_call_priv_sync_ops = {
643 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
644 .rpc_call_done = nfs41_call_sync_done,
647 static int nfs4_call_sync_sequence(struct nfs_server *server,
648 struct rpc_message *msg,
649 struct nfs4_sequence_args *args,
650 struct nfs4_sequence_res *res,
655 struct rpc_task *task;
656 struct nfs41_call_sync_data data = {
657 .seq_server = server,
660 .cache_reply = cache_reply,
662 struct rpc_task_setup task_setup = {
663 .rpc_client = server->client,
665 .callback_ops = &nfs41_call_sync_ops,
666 .callback_data = &data
671 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
672 task = rpc_run_task(&task_setup);
676 ret = task->tk_status;
682 int _nfs4_call_sync_session(struct nfs_server *server,
683 struct rpc_message *msg,
684 struct nfs4_sequence_args *args,
685 struct nfs4_sequence_res *res,
688 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
692 static int nfs4_sequence_done(struct rpc_task *task,
693 struct nfs4_sequence_res *res)
697 #endif /* CONFIG_NFS_V4_1 */
699 int _nfs4_call_sync(struct nfs_server *server,
700 struct rpc_message *msg,
701 struct nfs4_sequence_args *args,
702 struct nfs4_sequence_res *res,
705 args->sa_session = res->sr_session = NULL;
706 return rpc_call_sync(server->client, msg, 0);
709 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
710 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
711 &(res)->seq_res, (cache_reply))
713 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
715 struct nfs_inode *nfsi = NFS_I(dir);
717 spin_lock(&dir->i_lock);
718 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
719 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
720 nfs_force_lookup_revalidate(dir);
721 nfsi->change_attr = cinfo->after;
722 spin_unlock(&dir->i_lock);
725 struct nfs4_opendata {
727 struct nfs_openargs o_arg;
728 struct nfs_openres o_res;
729 struct nfs_open_confirmargs c_arg;
730 struct nfs_open_confirmres c_res;
731 struct nfs_fattr f_attr;
732 struct nfs_fattr dir_attr;
735 struct nfs4_state_owner *owner;
736 struct nfs4_state *state;
738 unsigned long timestamp;
739 unsigned int rpc_done : 1;
745 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
747 p->o_res.f_attr = &p->f_attr;
748 p->o_res.dir_attr = &p->dir_attr;
749 p->o_res.seqid = p->o_arg.seqid;
750 p->c_res.seqid = p->c_arg.seqid;
751 p->o_res.server = p->o_arg.server;
752 nfs_fattr_init(&p->f_attr);
753 nfs_fattr_init(&p->dir_attr);
756 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
757 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
758 const struct iattr *attrs,
761 struct dentry *parent = dget_parent(path->dentry);
762 struct inode *dir = parent->d_inode;
763 struct nfs_server *server = NFS_SERVER(dir);
764 struct nfs4_opendata *p;
766 p = kzalloc(sizeof(*p), gfp_mask);
769 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
770 if (p->o_arg.seqid == NULL)
776 atomic_inc(&sp->so_count);
777 p->o_arg.fh = NFS_FH(dir);
778 p->o_arg.open_flags = flags;
779 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
780 p->o_arg.clientid = server->nfs_client->cl_clientid;
781 p->o_arg.id = sp->so_owner_id.id;
782 p->o_arg.name = &p->path.dentry->d_name;
783 p->o_arg.server = server;
784 p->o_arg.bitmask = server->attr_bitmask;
785 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
786 if (flags & O_CREAT) {
789 p->o_arg.u.attrs = &p->attrs;
790 memcpy(&p->attrs, attrs, sizeof(p->attrs));
791 s = (u32 *) p->o_arg.u.verifier.data;
795 p->c_arg.fh = &p->o_res.fh;
796 p->c_arg.stateid = &p->o_res.stateid;
797 p->c_arg.seqid = p->o_arg.seqid;
798 nfs4_init_opendata_res(p);
808 static void nfs4_opendata_free(struct kref *kref)
810 struct nfs4_opendata *p = container_of(kref,
811 struct nfs4_opendata, kref);
813 nfs_free_seqid(p->o_arg.seqid);
814 if (p->state != NULL)
815 nfs4_put_open_state(p->state);
816 nfs4_put_state_owner(p->owner);
822 static void nfs4_opendata_put(struct nfs4_opendata *p)
825 kref_put(&p->kref, nfs4_opendata_free);
828 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
832 ret = rpc_wait_for_completion_task(task);
836 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
840 if (open_mode & O_EXCL)
842 switch (mode & (FMODE_READ|FMODE_WRITE)) {
844 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
845 && state->n_rdonly != 0;
848 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
849 && state->n_wronly != 0;
851 case FMODE_READ|FMODE_WRITE:
852 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
853 && state->n_rdwr != 0;
859 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
861 if ((delegation->type & fmode) != fmode)
863 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
865 nfs_mark_delegation_referenced(delegation);
869 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
878 case FMODE_READ|FMODE_WRITE:
881 nfs4_state_set_mode_locked(state, state->state | fmode);
884 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
886 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
887 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
888 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
891 set_bit(NFS_O_RDONLY_STATE, &state->flags);
894 set_bit(NFS_O_WRONLY_STATE, &state->flags);
896 case FMODE_READ|FMODE_WRITE:
897 set_bit(NFS_O_RDWR_STATE, &state->flags);
901 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
903 write_seqlock(&state->seqlock);
904 nfs_set_open_stateid_locked(state, stateid, fmode);
905 write_sequnlock(&state->seqlock);
908 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
911 * Protect the call to nfs4_state_set_mode_locked and
912 * serialise the stateid update
914 write_seqlock(&state->seqlock);
915 if (deleg_stateid != NULL) {
916 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
917 set_bit(NFS_DELEGATED_STATE, &state->flags);
919 if (open_stateid != NULL)
920 nfs_set_open_stateid_locked(state, open_stateid, fmode);
921 write_sequnlock(&state->seqlock);
922 spin_lock(&state->owner->so_lock);
923 update_open_stateflags(state, fmode);
924 spin_unlock(&state->owner->so_lock);
927 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
929 struct nfs_inode *nfsi = NFS_I(state->inode);
930 struct nfs_delegation *deleg_cur;
933 fmode &= (FMODE_READ|FMODE_WRITE);
936 deleg_cur = rcu_dereference(nfsi->delegation);
937 if (deleg_cur == NULL)
940 spin_lock(&deleg_cur->lock);
941 if (nfsi->delegation != deleg_cur ||
942 (deleg_cur->type & fmode) != fmode)
943 goto no_delegation_unlock;
945 if (delegation == NULL)
946 delegation = &deleg_cur->stateid;
947 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
948 goto no_delegation_unlock;
950 nfs_mark_delegation_referenced(deleg_cur);
951 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
953 no_delegation_unlock:
954 spin_unlock(&deleg_cur->lock);
958 if (!ret && open_stateid != NULL) {
959 __update_open_stateid(state, open_stateid, NULL, fmode);
967 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
969 struct nfs_delegation *delegation;
972 delegation = rcu_dereference(NFS_I(inode)->delegation);
973 if (delegation == NULL || (delegation->type & fmode) == fmode) {
978 nfs_inode_return_delegation(inode);
981 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
983 struct nfs4_state *state = opendata->state;
984 struct nfs_inode *nfsi = NFS_I(state->inode);
985 struct nfs_delegation *delegation;
986 int open_mode = opendata->o_arg.open_flags & O_EXCL;
987 fmode_t fmode = opendata->o_arg.fmode;
988 nfs4_stateid stateid;
992 if (can_open_cached(state, fmode, open_mode)) {
993 spin_lock(&state->owner->so_lock);
994 if (can_open_cached(state, fmode, open_mode)) {
995 update_open_stateflags(state, fmode);
996 spin_unlock(&state->owner->so_lock);
997 goto out_return_state;
999 spin_unlock(&state->owner->so_lock);
1002 delegation = rcu_dereference(nfsi->delegation);
1003 if (delegation == NULL ||
1004 !can_open_delegated(delegation, fmode)) {
1008 /* Save the delegation */
1009 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1011 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1016 /* Try to update the stateid using the delegation */
1017 if (update_open_stateid(state, NULL, &stateid, fmode))
1018 goto out_return_state;
1021 return ERR_PTR(ret);
1023 atomic_inc(&state->count);
1027 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1029 struct inode *inode;
1030 struct nfs4_state *state = NULL;
1031 struct nfs_delegation *delegation;
1034 if (!data->rpc_done) {
1035 state = nfs4_try_open_cached(data);
1040 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1042 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1043 ret = PTR_ERR(inode);
1047 state = nfs4_get_open_state(inode, data->owner);
1050 if (data->o_res.delegation_type != 0) {
1051 int delegation_flags = 0;
1054 delegation = rcu_dereference(NFS_I(inode)->delegation);
1056 delegation_flags = delegation->flags;
1058 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1059 nfs_inode_set_delegation(state->inode,
1060 data->owner->so_cred,
1063 nfs_inode_reclaim_delegation(state->inode,
1064 data->owner->so_cred,
1068 update_open_stateid(state, &data->o_res.stateid, NULL,
1076 return ERR_PTR(ret);
1079 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1081 struct nfs_inode *nfsi = NFS_I(state->inode);
1082 struct nfs_open_context *ctx;
1084 spin_lock(&state->inode->i_lock);
1085 list_for_each_entry(ctx, &nfsi->open_files, list) {
1086 if (ctx->state != state)
1088 get_nfs_open_context(ctx);
1089 spin_unlock(&state->inode->i_lock);
1092 spin_unlock(&state->inode->i_lock);
1093 return ERR_PTR(-ENOENT);
1096 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1098 struct nfs4_opendata *opendata;
1100 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1101 if (opendata == NULL)
1102 return ERR_PTR(-ENOMEM);
1103 opendata->state = state;
1104 atomic_inc(&state->count);
1108 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1110 struct nfs4_state *newstate;
1113 opendata->o_arg.open_flags = 0;
1114 opendata->o_arg.fmode = fmode;
1115 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1116 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1117 nfs4_init_opendata_res(opendata);
1118 ret = _nfs4_recover_proc_open(opendata);
1121 newstate = nfs4_opendata_to_nfs4_state(opendata);
1122 if (IS_ERR(newstate))
1123 return PTR_ERR(newstate);
1124 nfs4_close_state(&opendata->path, newstate, fmode);
1129 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1131 struct nfs4_state *newstate;
1134 /* memory barrier prior to reading state->n_* */
1135 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1137 if (state->n_rdwr != 0) {
1138 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1139 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1142 if (newstate != state)
1145 if (state->n_wronly != 0) {
1146 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1147 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1150 if (newstate != state)
1153 if (state->n_rdonly != 0) {
1154 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1155 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1158 if (newstate != state)
1162 * We may have performed cached opens for all three recoveries.
1163 * Check if we need to update the current stateid.
1165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1166 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1167 write_seqlock(&state->seqlock);
1168 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1169 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1170 write_sequnlock(&state->seqlock);
1177 * reclaim state on the server after a reboot.
1179 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1181 struct nfs_delegation *delegation;
1182 struct nfs4_opendata *opendata;
1183 fmode_t delegation_type = 0;
1186 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1187 if (IS_ERR(opendata))
1188 return PTR_ERR(opendata);
1189 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1190 opendata->o_arg.fh = NFS_FH(state->inode);
1192 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1193 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1194 delegation_type = delegation->type;
1196 opendata->o_arg.u.delegation_type = delegation_type;
1197 status = nfs4_open_recover(opendata, state);
1198 nfs4_opendata_put(opendata);
1202 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1204 struct nfs_server *server = NFS_SERVER(state->inode);
1205 struct nfs4_exception exception = { };
1208 err = _nfs4_do_open_reclaim(ctx, state);
1209 if (err != -NFS4ERR_DELAY)
1211 nfs4_handle_exception(server, err, &exception);
1212 } while (exception.retry);
1216 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1218 struct nfs_open_context *ctx;
1221 ctx = nfs4_state_find_open_context(state);
1223 return PTR_ERR(ctx);
1224 ret = nfs4_do_open_reclaim(ctx, state);
1225 put_nfs_open_context(ctx);
1229 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1231 struct nfs4_opendata *opendata;
1234 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1235 if (IS_ERR(opendata))
1236 return PTR_ERR(opendata);
1237 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1238 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1239 sizeof(opendata->o_arg.u.delegation.data));
1240 ret = nfs4_open_recover(opendata, state);
1241 nfs4_opendata_put(opendata);
1245 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1247 struct nfs4_exception exception = { };
1248 struct nfs_server *server = NFS_SERVER(state->inode);
1251 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1257 case -NFS4ERR_BADSESSION:
1258 case -NFS4ERR_BADSLOT:
1259 case -NFS4ERR_BAD_HIGH_SLOT:
1260 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1261 case -NFS4ERR_DEADSESSION:
1262 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1264 case -NFS4ERR_STALE_CLIENTID:
1265 case -NFS4ERR_STALE_STATEID:
1266 case -NFS4ERR_EXPIRED:
1267 /* Don't recall a delegation if it was lost */
1268 nfs4_schedule_lease_recovery(server->nfs_client);
1272 * The show must go on: exit, but mark the
1273 * stateid as needing recovery.
1275 case -NFS4ERR_ADMIN_REVOKED:
1276 case -NFS4ERR_BAD_STATEID:
1277 nfs4_schedule_stateid_recovery(server, state);
1280 * User RPCSEC_GSS context has expired.
1281 * We cannot recover this stateid now, so
1282 * skip it and allow recovery thread to
1289 err = nfs4_handle_exception(server, err, &exception);
1290 } while (exception.retry);
1295 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1297 struct nfs4_opendata *data = calldata;
1299 data->rpc_status = task->tk_status;
1300 if (data->rpc_status == 0) {
1301 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1302 sizeof(data->o_res.stateid.data));
1303 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1304 renew_lease(data->o_res.server, data->timestamp);
1309 static void nfs4_open_confirm_release(void *calldata)
1311 struct nfs4_opendata *data = calldata;
1312 struct nfs4_state *state = NULL;
1314 /* If this request hasn't been cancelled, do nothing */
1315 if (data->cancelled == 0)
1317 /* In case of error, no cleanup! */
1318 if (!data->rpc_done)
1320 state = nfs4_opendata_to_nfs4_state(data);
1322 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1324 nfs4_opendata_put(data);
1327 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1328 .rpc_call_done = nfs4_open_confirm_done,
1329 .rpc_release = nfs4_open_confirm_release,
1333 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1335 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1337 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1338 struct rpc_task *task;
1339 struct rpc_message msg = {
1340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1341 .rpc_argp = &data->c_arg,
1342 .rpc_resp = &data->c_res,
1343 .rpc_cred = data->owner->so_cred,
1345 struct rpc_task_setup task_setup_data = {
1346 .rpc_client = server->client,
1347 .rpc_message = &msg,
1348 .callback_ops = &nfs4_open_confirm_ops,
1349 .callback_data = data,
1350 .workqueue = nfsiod_workqueue,
1351 .flags = RPC_TASK_ASYNC,
1355 kref_get(&data->kref);
1357 data->rpc_status = 0;
1358 data->timestamp = jiffies;
1359 task = rpc_run_task(&task_setup_data);
1361 return PTR_ERR(task);
1362 status = nfs4_wait_for_completion_rpc_task(task);
1364 data->cancelled = 1;
1367 status = data->rpc_status;
1372 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1374 struct nfs4_opendata *data = calldata;
1375 struct nfs4_state_owner *sp = data->owner;
1377 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1380 * Check if we still need to send an OPEN call, or if we can use
1381 * a delegation instead.
1383 if (data->state != NULL) {
1384 struct nfs_delegation *delegation;
1386 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1389 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1390 if (delegation != NULL &&
1391 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1397 /* Update sequence id. */
1398 data->o_arg.id = sp->so_owner_id.id;
1399 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1400 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1401 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1402 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1404 data->timestamp = jiffies;
1405 if (nfs4_setup_sequence(data->o_arg.server,
1406 &data->o_arg.seq_args,
1407 &data->o_res.seq_res, 1, task))
1409 rpc_call_start(task);
1412 task->tk_action = NULL;
1416 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1418 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1419 nfs4_open_prepare(task, calldata);
1422 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1424 struct nfs4_opendata *data = calldata;
1426 data->rpc_status = task->tk_status;
1428 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1431 if (task->tk_status == 0) {
1432 switch (data->o_res.f_attr->mode & S_IFMT) {
1436 data->rpc_status = -ELOOP;
1439 data->rpc_status = -EISDIR;
1442 data->rpc_status = -ENOTDIR;
1444 renew_lease(data->o_res.server, data->timestamp);
1445 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1446 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1451 static void nfs4_open_release(void *calldata)
1453 struct nfs4_opendata *data = calldata;
1454 struct nfs4_state *state = NULL;
1456 /* If this request hasn't been cancelled, do nothing */
1457 if (data->cancelled == 0)
1459 /* In case of error, no cleanup! */
1460 if (data->rpc_status != 0 || !data->rpc_done)
1462 /* In case we need an open_confirm, no cleanup! */
1463 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1465 state = nfs4_opendata_to_nfs4_state(data);
1467 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1469 nfs4_opendata_put(data);
1472 static const struct rpc_call_ops nfs4_open_ops = {
1473 .rpc_call_prepare = nfs4_open_prepare,
1474 .rpc_call_done = nfs4_open_done,
1475 .rpc_release = nfs4_open_release,
1478 static const struct rpc_call_ops nfs4_recover_open_ops = {
1479 .rpc_call_prepare = nfs4_recover_open_prepare,
1480 .rpc_call_done = nfs4_open_done,
1481 .rpc_release = nfs4_open_release,
1484 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1486 struct inode *dir = data->dir->d_inode;
1487 struct nfs_server *server = NFS_SERVER(dir);
1488 struct nfs_openargs *o_arg = &data->o_arg;
1489 struct nfs_openres *o_res = &data->o_res;
1490 struct rpc_task *task;
1491 struct rpc_message msg = {
1492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1495 .rpc_cred = data->owner->so_cred,
1497 struct rpc_task_setup task_setup_data = {
1498 .rpc_client = server->client,
1499 .rpc_message = &msg,
1500 .callback_ops = &nfs4_open_ops,
1501 .callback_data = data,
1502 .workqueue = nfsiod_workqueue,
1503 .flags = RPC_TASK_ASYNC,
1507 kref_get(&data->kref);
1509 data->rpc_status = 0;
1510 data->cancelled = 0;
1512 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1513 task = rpc_run_task(&task_setup_data);
1515 return PTR_ERR(task);
1516 status = nfs4_wait_for_completion_rpc_task(task);
1518 data->cancelled = 1;
1521 status = data->rpc_status;
1527 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1529 struct inode *dir = data->dir->d_inode;
1530 struct nfs_openres *o_res = &data->o_res;
1533 status = nfs4_run_open_task(data, 1);
1534 if (status != 0 || !data->rpc_done)
1537 nfs_refresh_inode(dir, o_res->dir_attr);
1539 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1540 status = _nfs4_proc_open_confirm(data);
1549 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1551 static int _nfs4_proc_open(struct nfs4_opendata *data)
1553 struct inode *dir = data->dir->d_inode;
1554 struct nfs_server *server = NFS_SERVER(dir);
1555 struct nfs_openargs *o_arg = &data->o_arg;
1556 struct nfs_openres *o_res = &data->o_res;
1559 status = nfs4_run_open_task(data, 0);
1560 if (status != 0 || !data->rpc_done)
1563 if (o_arg->open_flags & O_CREAT) {
1564 update_changeattr(dir, &o_res->cinfo);
1565 nfs_post_op_update_inode(dir, o_res->dir_attr);
1567 nfs_refresh_inode(dir, o_res->dir_attr);
1568 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1569 server->caps &= ~NFS_CAP_POSIX_LOCK;
1570 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1571 status = _nfs4_proc_open_confirm(data);
1575 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1576 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1580 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1585 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1586 ret = nfs4_wait_clnt_recover(clp);
1589 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1590 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1592 nfs4_schedule_state_manager(clp);
1598 static int nfs4_recover_expired_lease(struct nfs_server *server)
1600 return nfs4_client_recover_expired_lease(server->nfs_client);
1605 * reclaim state on the server after a network partition.
1606 * Assumes caller holds the appropriate lock
1608 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1610 struct nfs4_opendata *opendata;
1613 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1614 if (IS_ERR(opendata))
1615 return PTR_ERR(opendata);
1616 ret = nfs4_open_recover(opendata, state);
1618 d_drop(ctx->path.dentry);
1619 nfs4_opendata_put(opendata);
1623 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1625 struct nfs_server *server = NFS_SERVER(state->inode);
1626 struct nfs4_exception exception = { };
1630 err = _nfs4_open_expired(ctx, state);
1634 case -NFS4ERR_GRACE:
1635 case -NFS4ERR_DELAY:
1636 nfs4_handle_exception(server, err, &exception);
1639 } while (exception.retry);
1644 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1646 struct nfs_open_context *ctx;
1649 ctx = nfs4_state_find_open_context(state);
1651 return PTR_ERR(ctx);
1652 ret = nfs4_do_open_expired(ctx, state);
1653 put_nfs_open_context(ctx);
1658 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1659 * fields corresponding to attributes that were used to store the verifier.
1660 * Make sure we clobber those fields in the later setattr call
1662 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1664 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1665 !(sattr->ia_valid & ATTR_ATIME_SET))
1666 sattr->ia_valid |= ATTR_ATIME;
1668 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1669 !(sattr->ia_valid & ATTR_MTIME_SET))
1670 sattr->ia_valid |= ATTR_MTIME;
1674 * Returns a referenced nfs4_state
1676 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1678 struct nfs4_state_owner *sp;
1679 struct nfs4_state *state = NULL;
1680 struct nfs_server *server = NFS_SERVER(dir);
1681 struct nfs4_opendata *opendata;
1684 /* Protect against reboot recovery conflicts */
1686 if (!(sp = nfs4_get_state_owner(server, cred))) {
1687 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1690 status = nfs4_recover_expired_lease(server);
1692 goto err_put_state_owner;
1693 if (path->dentry->d_inode != NULL)
1694 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1696 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1697 if (opendata == NULL)
1698 goto err_put_state_owner;
1700 if (path->dentry->d_inode != NULL)
1701 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1703 status = _nfs4_proc_open(opendata);
1705 goto err_opendata_put;
1707 state = nfs4_opendata_to_nfs4_state(opendata);
1708 status = PTR_ERR(state);
1710 goto err_opendata_put;
1711 if (server->caps & NFS_CAP_POSIX_LOCK)
1712 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1714 if (opendata->o_arg.open_flags & O_EXCL) {
1715 nfs4_exclusive_attrset(opendata, sattr);
1717 nfs_fattr_init(opendata->o_res.f_attr);
1718 status = nfs4_do_setattr(state->inode, cred,
1719 opendata->o_res.f_attr, sattr,
1722 nfs_setattr_update_inode(state->inode, sattr);
1723 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1725 nfs4_opendata_put(opendata);
1726 nfs4_put_state_owner(sp);
1730 nfs4_opendata_put(opendata);
1731 err_put_state_owner:
1732 nfs4_put_state_owner(sp);
1739 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1741 struct nfs4_exception exception = { };
1742 struct nfs4_state *res;
1746 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1749 /* NOTE: BAD_SEQID means the server and client disagree about the
1750 * book-keeping w.r.t. state-changing operations
1751 * (OPEN/CLOSE/LOCK/LOCKU...)
1752 * It is actually a sign of a bug on the client or on the server.
1754 * If we receive a BAD_SEQID error in the particular case of
1755 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1756 * have unhashed the old state_owner for us, and that we can
1757 * therefore safely retry using a new one. We should still warn
1758 * the user though...
1760 if (status == -NFS4ERR_BAD_SEQID) {
1761 printk(KERN_WARNING "NFS: v4 server %s "
1762 " returned a bad sequence-id error!\n",
1763 NFS_SERVER(dir)->nfs_client->cl_hostname);
1764 exception.retry = 1;
1768 * BAD_STATEID on OPEN means that the server cancelled our
1769 * state before it received the OPEN_CONFIRM.
1770 * Recover by retrying the request as per the discussion
1771 * on Page 181 of RFC3530.
1773 if (status == -NFS4ERR_BAD_STATEID) {
1774 exception.retry = 1;
1777 if (status == -EAGAIN) {
1778 /* We must have found a delegation */
1779 exception.retry = 1;
1782 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1783 status, &exception));
1784 } while (exception.retry);
1788 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1789 struct nfs_fattr *fattr, struct iattr *sattr,
1790 struct nfs4_state *state)
1792 struct nfs_server *server = NFS_SERVER(inode);
1793 struct nfs_setattrargs arg = {
1794 .fh = NFS_FH(inode),
1797 .bitmask = server->attr_bitmask,
1799 struct nfs_setattrres res = {
1803 struct rpc_message msg = {
1804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1809 unsigned long timestamp = jiffies;
1812 nfs_fattr_init(fattr);
1814 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1815 /* Use that stateid */
1816 } else if (state != NULL) {
1817 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1819 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1821 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1822 if (status == 0 && state != NULL)
1823 renew_lease(server, timestamp);
1827 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1828 struct nfs_fattr *fattr, struct iattr *sattr,
1829 struct nfs4_state *state)
1831 struct nfs_server *server = NFS_SERVER(inode);
1832 struct nfs4_exception exception = { };
1835 err = nfs4_handle_exception(server,
1836 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1838 } while (exception.retry);
1842 struct nfs4_closedata {
1844 struct inode *inode;
1845 struct nfs4_state *state;
1846 struct nfs_closeargs arg;
1847 struct nfs_closeres res;
1848 struct nfs_fattr fattr;
1849 unsigned long timestamp;
1854 static void nfs4_free_closedata(void *data)
1856 struct nfs4_closedata *calldata = data;
1857 struct nfs4_state_owner *sp = calldata->state->owner;
1860 pnfs_roc_release(calldata->state->inode);
1861 nfs4_put_open_state(calldata->state);
1862 nfs_free_seqid(calldata->arg.seqid);
1863 nfs4_put_state_owner(sp);
1864 path_put(&calldata->path);
1868 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1871 spin_lock(&state->owner->so_lock);
1872 if (!(fmode & FMODE_READ))
1873 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1874 if (!(fmode & FMODE_WRITE))
1875 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1876 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1877 spin_unlock(&state->owner->so_lock);
1880 static void nfs4_close_done(struct rpc_task *task, void *data)
1882 struct nfs4_closedata *calldata = data;
1883 struct nfs4_state *state = calldata->state;
1884 struct nfs_server *server = NFS_SERVER(calldata->inode);
1886 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1888 /* hmm. we are done with the inode, and in the process of freeing
1889 * the state_owner. we keep this around to process errors
1891 switch (task->tk_status) {
1894 pnfs_roc_set_barrier(state->inode,
1895 calldata->roc_barrier);
1896 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1897 renew_lease(server, calldata->timestamp);
1898 nfs4_close_clear_stateid_flags(state,
1899 calldata->arg.fmode);
1901 case -NFS4ERR_STALE_STATEID:
1902 case -NFS4ERR_OLD_STATEID:
1903 case -NFS4ERR_BAD_STATEID:
1904 case -NFS4ERR_EXPIRED:
1905 if (calldata->arg.fmode == 0)
1908 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1909 rpc_restart_call_prepare(task);
1911 nfs_release_seqid(calldata->arg.seqid);
1912 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1915 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1917 struct nfs4_closedata *calldata = data;
1918 struct nfs4_state *state = calldata->state;
1921 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1924 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1925 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1926 spin_lock(&state->owner->so_lock);
1927 /* Calculate the change in open mode */
1928 if (state->n_rdwr == 0) {
1929 if (state->n_rdonly == 0) {
1930 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1931 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1932 calldata->arg.fmode &= ~FMODE_READ;
1934 if (state->n_wronly == 0) {
1935 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1936 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1937 calldata->arg.fmode &= ~FMODE_WRITE;
1940 spin_unlock(&state->owner->so_lock);
1943 /* Note: exit _without_ calling nfs4_close_done */
1944 task->tk_action = NULL;
1948 if (calldata->arg.fmode == 0) {
1949 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1950 if (calldata->roc &&
1951 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1952 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1958 nfs_fattr_init(calldata->res.fattr);
1959 calldata->timestamp = jiffies;
1960 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1961 &calldata->arg.seq_args, &calldata->res.seq_res,
1964 rpc_call_start(task);
1967 static const struct rpc_call_ops nfs4_close_ops = {
1968 .rpc_call_prepare = nfs4_close_prepare,
1969 .rpc_call_done = nfs4_close_done,
1970 .rpc_release = nfs4_free_closedata,
1974 * It is possible for data to be read/written from a mem-mapped file
1975 * after the sys_close call (which hits the vfs layer as a flush).
1976 * This means that we can't safely call nfsv4 close on a file until
1977 * the inode is cleared. This in turn means that we are not good
1978 * NFSv4 citizens - we do not indicate to the server to update the file's
1979 * share state even when we are done with one of the three share
1980 * stateid's in the inode.
1982 * NOTE: Caller must be holding the sp->so_owner semaphore!
1984 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1986 struct nfs_server *server = NFS_SERVER(state->inode);
1987 struct nfs4_closedata *calldata;
1988 struct nfs4_state_owner *sp = state->owner;
1989 struct rpc_task *task;
1990 struct rpc_message msg = {
1991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1992 .rpc_cred = state->owner->so_cred,
1994 struct rpc_task_setup task_setup_data = {
1995 .rpc_client = server->client,
1996 .rpc_message = &msg,
1997 .callback_ops = &nfs4_close_ops,
1998 .workqueue = nfsiod_workqueue,
1999 .flags = RPC_TASK_ASYNC,
2001 int status = -ENOMEM;
2003 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2004 if (calldata == NULL)
2006 calldata->inode = state->inode;
2007 calldata->state = state;
2008 calldata->arg.fh = NFS_FH(state->inode);
2009 calldata->arg.stateid = &state->open_stateid;
2010 /* Serialization for the sequence id */
2011 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2012 if (calldata->arg.seqid == NULL)
2013 goto out_free_calldata;
2014 calldata->arg.fmode = 0;
2015 calldata->arg.bitmask = server->cache_consistency_bitmask;
2016 calldata->res.fattr = &calldata->fattr;
2017 calldata->res.seqid = calldata->arg.seqid;
2018 calldata->res.server = server;
2019 calldata->roc = roc;
2021 calldata->path = *path;
2023 msg.rpc_argp = &calldata->arg;
2024 msg.rpc_resp = &calldata->res;
2025 task_setup_data.callback_data = calldata;
2026 task = rpc_run_task(&task_setup_data);
2028 return PTR_ERR(task);
2031 status = rpc_wait_for_completion_task(task);
2038 pnfs_roc_release(state->inode);
2039 nfs4_put_open_state(state);
2040 nfs4_put_state_owner(sp);
2044 static struct inode *
2045 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2047 struct nfs4_state *state;
2049 /* Protect against concurrent sillydeletes */
2050 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2052 return ERR_CAST(state);
2054 return igrab(state->inode);
2057 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2059 if (ctx->state == NULL)
2062 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2064 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2067 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2069 struct nfs4_server_caps_arg args = {
2072 struct nfs4_server_caps_res res = {};
2073 struct rpc_message msg = {
2074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2080 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2082 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2083 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2084 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2085 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2086 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2087 NFS_CAP_CTIME|NFS_CAP_MTIME);
2088 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2089 server->caps |= NFS_CAP_ACLS;
2090 if (res.has_links != 0)
2091 server->caps |= NFS_CAP_HARDLINKS;
2092 if (res.has_symlinks != 0)
2093 server->caps |= NFS_CAP_SYMLINKS;
2094 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2095 server->caps |= NFS_CAP_FILEID;
2096 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2097 server->caps |= NFS_CAP_MODE;
2098 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2099 server->caps |= NFS_CAP_NLINK;
2100 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2101 server->caps |= NFS_CAP_OWNER;
2102 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2103 server->caps |= NFS_CAP_OWNER_GROUP;
2104 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2105 server->caps |= NFS_CAP_ATIME;
2106 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2107 server->caps |= NFS_CAP_CTIME;
2108 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2109 server->caps |= NFS_CAP_MTIME;
2111 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2112 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2113 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2114 server->acl_bitmask = res.acl_bitmask;
2120 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2122 struct nfs4_exception exception = { };
2125 err = nfs4_handle_exception(server,
2126 _nfs4_server_capabilities(server, fhandle),
2128 } while (exception.retry);
2132 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2133 struct nfs_fsinfo *info)
2135 struct nfs4_lookup_root_arg args = {
2136 .bitmask = nfs4_fattr_bitmap,
2138 struct nfs4_lookup_res res = {
2140 .fattr = info->fattr,
2143 struct rpc_message msg = {
2144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2149 nfs_fattr_init(info->fattr);
2150 return nfs4_call_sync(server, &msg, &args, &res, 0);
2153 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2154 struct nfs_fsinfo *info)
2156 struct nfs4_exception exception = { };
2159 err = nfs4_handle_exception(server,
2160 _nfs4_lookup_root(server, fhandle, info),
2162 } while (exception.retry);
2167 * get the file handle for the "/" directory on the server
2169 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2170 struct nfs_fsinfo *info)
2174 status = nfs4_lookup_root(server, fhandle, info);
2176 status = nfs4_server_capabilities(server, fhandle);
2178 status = nfs4_do_fsinfo(server, fhandle, info);
2179 return nfs4_map_errors(status);
2183 * Get locations and (maybe) other attributes of a referral.
2184 * Note that we'll actually follow the referral later when
2185 * we detect fsid mismatch in inode revalidation
2187 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2189 int status = -ENOMEM;
2190 struct page *page = NULL;
2191 struct nfs4_fs_locations *locations = NULL;
2193 page = alloc_page(GFP_KERNEL);
2196 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2197 if (locations == NULL)
2200 status = nfs4_proc_fs_locations(dir, name, locations, page);
2203 /* Make sure server returned a different fsid for the referral */
2204 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2205 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2210 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2211 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2213 fattr->mode = S_IFDIR;
2214 memset(fhandle, 0, sizeof(struct nfs_fh));
2222 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2224 struct nfs4_getattr_arg args = {
2226 .bitmask = server->attr_bitmask,
2228 struct nfs4_getattr_res res = {
2232 struct rpc_message msg = {
2233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2238 nfs_fattr_init(fattr);
2239 return nfs4_call_sync(server, &msg, &args, &res, 0);
2242 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2244 struct nfs4_exception exception = { };
2247 err = nfs4_handle_exception(server,
2248 _nfs4_proc_getattr(server, fhandle, fattr),
2250 } while (exception.retry);
2255 * The file is not closed if it is opened due to the a request to change
2256 * the size of the file. The open call will not be needed once the
2257 * VFS layer lookup-intents are implemented.
2259 * Close is called when the inode is destroyed.
2260 * If we haven't opened the file for O_WRONLY, we
2261 * need to in the size_change case to obtain a stateid.
2264 * Because OPEN is always done by name in nfsv4, it is
2265 * possible that we opened a different file by the same
2266 * name. We can recognize this race condition, but we
2267 * can't do anything about it besides returning an error.
2269 * This will be fixed with VFS changes (lookup-intent).
2272 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2273 struct iattr *sattr)
2275 struct inode *inode = dentry->d_inode;
2276 struct rpc_cred *cred = NULL;
2277 struct nfs4_state *state = NULL;
2280 nfs_fattr_init(fattr);
2282 /* Search for an existing open(O_WRITE) file */
2283 if (sattr->ia_valid & ATTR_FILE) {
2284 struct nfs_open_context *ctx;
2286 ctx = nfs_file_open_context(sattr->ia_file);
2293 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2295 nfs_setattr_update_inode(inode, sattr);
2299 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2300 const struct qstr *name, struct nfs_fh *fhandle,
2301 struct nfs_fattr *fattr)
2304 struct nfs4_lookup_arg args = {
2305 .bitmask = server->attr_bitmask,
2309 struct nfs4_lookup_res res = {
2314 struct rpc_message msg = {
2315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2320 nfs_fattr_init(fattr);
2322 dprintk("NFS call lookupfh %s\n", name->name);
2323 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2324 dprintk("NFS reply lookupfh: %d\n", status);
2328 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2329 struct qstr *name, struct nfs_fh *fhandle,
2330 struct nfs_fattr *fattr)
2332 struct nfs4_exception exception = { };
2335 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2337 if (err == -NFS4ERR_MOVED) {
2341 err = nfs4_handle_exception(server, err, &exception);
2342 } while (exception.retry);
2346 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2347 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2351 dprintk("NFS call lookup %s\n", name->name);
2352 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2353 if (status == -NFS4ERR_MOVED)
2354 status = nfs4_get_referral(dir, name, fattr, fhandle);
2355 dprintk("NFS reply lookup: %d\n", status);
2359 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2361 struct nfs4_exception exception = { };
2364 err = nfs4_handle_exception(NFS_SERVER(dir),
2365 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2367 } while (exception.retry);
2371 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2373 struct nfs_server *server = NFS_SERVER(inode);
2374 struct nfs4_accessargs args = {
2375 .fh = NFS_FH(inode),
2376 .bitmask = server->attr_bitmask,
2378 struct nfs4_accessres res = {
2381 struct rpc_message msg = {
2382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2385 .rpc_cred = entry->cred,
2387 int mode = entry->mask;
2391 * Determine which access bits we want to ask for...
2393 if (mode & MAY_READ)
2394 args.access |= NFS4_ACCESS_READ;
2395 if (S_ISDIR(inode->i_mode)) {
2396 if (mode & MAY_WRITE)
2397 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2398 if (mode & MAY_EXEC)
2399 args.access |= NFS4_ACCESS_LOOKUP;
2401 if (mode & MAY_WRITE)
2402 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2403 if (mode & MAY_EXEC)
2404 args.access |= NFS4_ACCESS_EXECUTE;
2407 res.fattr = nfs_alloc_fattr();
2408 if (res.fattr == NULL)
2411 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2414 if (res.access & NFS4_ACCESS_READ)
2415 entry->mask |= MAY_READ;
2416 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2417 entry->mask |= MAY_WRITE;
2418 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2419 entry->mask |= MAY_EXEC;
2420 nfs_refresh_inode(inode, res.fattr);
2422 nfs_free_fattr(res.fattr);
2426 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2428 struct nfs4_exception exception = { };
2431 err = nfs4_handle_exception(NFS_SERVER(inode),
2432 _nfs4_proc_access(inode, entry),
2434 } while (exception.retry);
2439 * TODO: For the time being, we don't try to get any attributes
2440 * along with any of the zero-copy operations READ, READDIR,
2443 * In the case of the first three, we want to put the GETATTR
2444 * after the read-type operation -- this is because it is hard
2445 * to predict the length of a GETATTR response in v4, and thus
2446 * align the READ data correctly. This means that the GETATTR
2447 * may end up partially falling into the page cache, and we should
2448 * shift it into the 'tail' of the xdr_buf before processing.
2449 * To do this efficiently, we need to know the total length
2450 * of data received, which doesn't seem to be available outside
2453 * In the case of WRITE, we also want to put the GETATTR after
2454 * the operation -- in this case because we want to make sure
2455 * we get the post-operation mtime and size. This means that
2456 * we can't use xdr_encode_pages() as written: we need a variant
2457 * of it which would leave room in the 'tail' iovec.
2459 * Both of these changes to the XDR layer would in fact be quite
2460 * minor, but I decided to leave them for a subsequent patch.
2462 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2463 unsigned int pgbase, unsigned int pglen)
2465 struct nfs4_readlink args = {
2466 .fh = NFS_FH(inode),
2471 struct nfs4_readlink_res res;
2472 struct rpc_message msg = {
2473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2478 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2481 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2482 unsigned int pgbase, unsigned int pglen)
2484 struct nfs4_exception exception = { };
2487 err = nfs4_handle_exception(NFS_SERVER(inode),
2488 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2490 } while (exception.retry);
2496 * We will need to arrange for the VFS layer to provide an atomic open.
2497 * Until then, this create/open method is prone to inefficiency and race
2498 * conditions due to the lookup, create, and open VFS calls from sys_open()
2499 * placed on the wire.
2501 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2502 * The file will be opened again in the subsequent VFS open call
2503 * (nfs4_proc_file_open).
2505 * The open for read will just hang around to be used by any process that
2506 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2510 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2511 int flags, struct nfs_open_context *ctx)
2513 struct path my_path = {
2516 struct path *path = &my_path;
2517 struct nfs4_state *state;
2518 struct rpc_cred *cred = NULL;
2527 sattr->ia_mode &= ~current_umask();
2528 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2530 if (IS_ERR(state)) {
2531 status = PTR_ERR(state);
2534 d_add(dentry, igrab(state->inode));
2535 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2539 nfs4_close_sync(path, state, fmode);
2544 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2546 struct nfs_server *server = NFS_SERVER(dir);
2547 struct nfs_removeargs args = {
2549 .name.len = name->len,
2550 .name.name = name->name,
2551 .bitmask = server->attr_bitmask,
2553 struct nfs_removeres res = {
2556 struct rpc_message msg = {
2557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2561 int status = -ENOMEM;
2563 res.dir_attr = nfs_alloc_fattr();
2564 if (res.dir_attr == NULL)
2567 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2569 update_changeattr(dir, &res.cinfo);
2570 nfs_post_op_update_inode(dir, res.dir_attr);
2572 nfs_free_fattr(res.dir_attr);
2577 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2579 struct nfs4_exception exception = { };
2582 err = nfs4_handle_exception(NFS_SERVER(dir),
2583 _nfs4_proc_remove(dir, name),
2585 } while (exception.retry);
2589 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2591 struct nfs_server *server = NFS_SERVER(dir);
2592 struct nfs_removeargs *args = msg->rpc_argp;
2593 struct nfs_removeres *res = msg->rpc_resp;
2595 args->bitmask = server->cache_consistency_bitmask;
2596 res->server = server;
2597 res->seq_res.sr_slot = NULL;
2598 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2601 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2603 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2605 if (!nfs4_sequence_done(task, &res->seq_res))
2607 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2609 update_changeattr(dir, &res->cinfo);
2610 nfs_post_op_update_inode(dir, res->dir_attr);
2614 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2616 struct nfs_server *server = NFS_SERVER(dir);
2617 struct nfs_renameargs *arg = msg->rpc_argp;
2618 struct nfs_renameres *res = msg->rpc_resp;
2620 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2621 arg->bitmask = server->attr_bitmask;
2622 res->server = server;
2625 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2626 struct inode *new_dir)
2628 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2630 if (!nfs4_sequence_done(task, &res->seq_res))
2632 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2635 update_changeattr(old_dir, &res->old_cinfo);
2636 nfs_post_op_update_inode(old_dir, res->old_fattr);
2637 update_changeattr(new_dir, &res->new_cinfo);
2638 nfs_post_op_update_inode(new_dir, res->new_fattr);
2642 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2643 struct inode *new_dir, struct qstr *new_name)
2645 struct nfs_server *server = NFS_SERVER(old_dir);
2646 struct nfs_renameargs arg = {
2647 .old_dir = NFS_FH(old_dir),
2648 .new_dir = NFS_FH(new_dir),
2649 .old_name = old_name,
2650 .new_name = new_name,
2651 .bitmask = server->attr_bitmask,
2653 struct nfs_renameres res = {
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2661 int status = -ENOMEM;
2663 res.old_fattr = nfs_alloc_fattr();
2664 res.new_fattr = nfs_alloc_fattr();
2665 if (res.old_fattr == NULL || res.new_fattr == NULL)
2668 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2670 update_changeattr(old_dir, &res.old_cinfo);
2671 nfs_post_op_update_inode(old_dir, res.old_fattr);
2672 update_changeattr(new_dir, &res.new_cinfo);
2673 nfs_post_op_update_inode(new_dir, res.new_fattr);
2676 nfs_free_fattr(res.new_fattr);
2677 nfs_free_fattr(res.old_fattr);
2681 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2682 struct inode *new_dir, struct qstr *new_name)
2684 struct nfs4_exception exception = { };
2687 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2688 _nfs4_proc_rename(old_dir, old_name,
2691 } while (exception.retry);
2695 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2697 struct nfs_server *server = NFS_SERVER(inode);
2698 struct nfs4_link_arg arg = {
2699 .fh = NFS_FH(inode),
2700 .dir_fh = NFS_FH(dir),
2702 .bitmask = server->attr_bitmask,
2704 struct nfs4_link_res res = {
2707 struct rpc_message msg = {
2708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2712 int status = -ENOMEM;
2714 res.fattr = nfs_alloc_fattr();
2715 res.dir_attr = nfs_alloc_fattr();
2716 if (res.fattr == NULL || res.dir_attr == NULL)
2719 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2721 update_changeattr(dir, &res.cinfo);
2722 nfs_post_op_update_inode(dir, res.dir_attr);
2723 nfs_post_op_update_inode(inode, res.fattr);
2726 nfs_free_fattr(res.dir_attr);
2727 nfs_free_fattr(res.fattr);
2731 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2733 struct nfs4_exception exception = { };
2736 err = nfs4_handle_exception(NFS_SERVER(inode),
2737 _nfs4_proc_link(inode, dir, name),
2739 } while (exception.retry);
2743 struct nfs4_createdata {
2744 struct rpc_message msg;
2745 struct nfs4_create_arg arg;
2746 struct nfs4_create_res res;
2748 struct nfs_fattr fattr;
2749 struct nfs_fattr dir_fattr;
2752 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2753 struct qstr *name, struct iattr *sattr, u32 ftype)
2755 struct nfs4_createdata *data;
2757 data = kzalloc(sizeof(*data), GFP_KERNEL);
2759 struct nfs_server *server = NFS_SERVER(dir);
2761 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2762 data->msg.rpc_argp = &data->arg;
2763 data->msg.rpc_resp = &data->res;
2764 data->arg.dir_fh = NFS_FH(dir);
2765 data->arg.server = server;
2766 data->arg.name = name;
2767 data->arg.attrs = sattr;
2768 data->arg.ftype = ftype;
2769 data->arg.bitmask = server->attr_bitmask;
2770 data->res.server = server;
2771 data->res.fh = &data->fh;
2772 data->res.fattr = &data->fattr;
2773 data->res.dir_fattr = &data->dir_fattr;
2774 nfs_fattr_init(data->res.fattr);
2775 nfs_fattr_init(data->res.dir_fattr);
2780 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2782 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2783 &data->arg, &data->res, 1);
2785 update_changeattr(dir, &data->res.dir_cinfo);
2786 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2787 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2792 static void nfs4_free_createdata(struct nfs4_createdata *data)
2797 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2798 struct page *page, unsigned int len, struct iattr *sattr)
2800 struct nfs4_createdata *data;
2801 int status = -ENAMETOOLONG;
2803 if (len > NFS4_MAXPATHLEN)
2807 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2811 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2812 data->arg.u.symlink.pages = &page;
2813 data->arg.u.symlink.len = len;
2815 status = nfs4_do_create(dir, dentry, data);
2817 nfs4_free_createdata(data);
2822 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2823 struct page *page, unsigned int len, struct iattr *sattr)
2825 struct nfs4_exception exception = { };
2828 err = nfs4_handle_exception(NFS_SERVER(dir),
2829 _nfs4_proc_symlink(dir, dentry, page,
2832 } while (exception.retry);
2836 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2837 struct iattr *sattr)
2839 struct nfs4_createdata *data;
2840 int status = -ENOMEM;
2842 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2846 status = nfs4_do_create(dir, dentry, data);
2848 nfs4_free_createdata(data);
2853 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2854 struct iattr *sattr)
2856 struct nfs4_exception exception = { };
2859 sattr->ia_mode &= ~current_umask();
2861 err = nfs4_handle_exception(NFS_SERVER(dir),
2862 _nfs4_proc_mkdir(dir, dentry, sattr),
2864 } while (exception.retry);
2868 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2869 u64 cookie, struct page **pages, unsigned int count, int plus)
2871 struct inode *dir = dentry->d_inode;
2872 struct nfs4_readdir_arg args = {
2877 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2880 struct nfs4_readdir_res res;
2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2889 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2890 dentry->d_parent->d_name.name,
2891 dentry->d_name.name,
2892 (unsigned long long)cookie);
2893 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2894 res.pgbase = args.pgbase;
2895 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2897 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2898 status += args.pgbase;
2901 nfs_invalidate_atime(dir);
2903 dprintk("%s: returns %d\n", __func__, status);
2907 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2908 u64 cookie, struct page **pages, unsigned int count, int plus)
2910 struct nfs4_exception exception = { };
2913 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2914 _nfs4_proc_readdir(dentry, cred, cookie,
2915 pages, count, plus),
2917 } while (exception.retry);
2921 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2922 struct iattr *sattr, dev_t rdev)
2924 struct nfs4_createdata *data;
2925 int mode = sattr->ia_mode;
2926 int status = -ENOMEM;
2928 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2929 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2931 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2936 data->arg.ftype = NF4FIFO;
2937 else if (S_ISBLK(mode)) {
2938 data->arg.ftype = NF4BLK;
2939 data->arg.u.device.specdata1 = MAJOR(rdev);
2940 data->arg.u.device.specdata2 = MINOR(rdev);
2942 else if (S_ISCHR(mode)) {
2943 data->arg.ftype = NF4CHR;
2944 data->arg.u.device.specdata1 = MAJOR(rdev);
2945 data->arg.u.device.specdata2 = MINOR(rdev);
2948 status = nfs4_do_create(dir, dentry, data);
2950 nfs4_free_createdata(data);
2955 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2956 struct iattr *sattr, dev_t rdev)
2958 struct nfs4_exception exception = { };
2961 sattr->ia_mode &= ~current_umask();
2963 err = nfs4_handle_exception(NFS_SERVER(dir),
2964 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2966 } while (exception.retry);
2970 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2971 struct nfs_fsstat *fsstat)
2973 struct nfs4_statfs_arg args = {
2975 .bitmask = server->attr_bitmask,
2977 struct nfs4_statfs_res res = {
2980 struct rpc_message msg = {
2981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2986 nfs_fattr_init(fsstat->fattr);
2987 return nfs4_call_sync(server, &msg, &args, &res, 0);
2990 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2992 struct nfs4_exception exception = { };
2995 err = nfs4_handle_exception(server,
2996 _nfs4_proc_statfs(server, fhandle, fsstat),
2998 } while (exception.retry);
3002 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3003 struct nfs_fsinfo *fsinfo)
3005 struct nfs4_fsinfo_arg args = {
3007 .bitmask = server->attr_bitmask,
3009 struct nfs4_fsinfo_res res = {
3012 struct rpc_message msg = {
3013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3018 return nfs4_call_sync(server, &msg, &args, &res, 0);
3021 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3023 struct nfs4_exception exception = { };
3027 err = nfs4_handle_exception(server,
3028 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3030 } while (exception.retry);
3034 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3036 nfs_fattr_init(fsinfo->fattr);
3037 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3040 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3041 struct nfs_pathconf *pathconf)
3043 struct nfs4_pathconf_arg args = {
3045 .bitmask = server->attr_bitmask,
3047 struct nfs4_pathconf_res res = {
3048 .pathconf = pathconf,
3050 struct rpc_message msg = {
3051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3056 /* None of the pathconf attributes are mandatory to implement */
3057 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3058 memset(pathconf, 0, sizeof(*pathconf));
3062 nfs_fattr_init(pathconf->fattr);
3063 return nfs4_call_sync(server, &msg, &args, &res, 0);
3066 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3067 struct nfs_pathconf *pathconf)
3069 struct nfs4_exception exception = { };
3073 err = nfs4_handle_exception(server,
3074 _nfs4_proc_pathconf(server, fhandle, pathconf),
3076 } while (exception.retry);
3080 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3082 struct nfs_server *server = NFS_SERVER(data->inode);
3084 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3085 nfs_restart_rpc(task, server->nfs_client);
3089 nfs_invalidate_atime(data->inode);
3090 if (task->tk_status > 0)
3091 renew_lease(server, data->timestamp);
3095 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3098 dprintk("--> %s\n", __func__);
3100 if (!nfs4_sequence_done(task, &data->res.seq_res))
3103 return data->read_done_cb(task, data);
3106 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3108 data->timestamp = jiffies;
3109 data->read_done_cb = nfs4_read_done_cb;
3110 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3113 /* Reset the the nfs_read_data to send the read to the MDS. */
3114 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3116 dprintk("%s Reset task for i/o through\n", __func__);
3117 put_lseg(data->lseg);
3119 /* offsets will differ in the dense stripe case */
3120 data->args.offset = data->mds_offset;
3121 data->ds_clp = NULL;
3122 data->args.fh = NFS_FH(data->inode);
3123 data->read_done_cb = nfs4_read_done_cb;
3124 task->tk_ops = data->mds_ops;
3125 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3127 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3129 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3131 struct inode *inode = data->inode;
3133 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3134 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3137 if (task->tk_status >= 0) {
3138 renew_lease(NFS_SERVER(inode), data->timestamp);
3139 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3144 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3146 if (!nfs4_sequence_done(task, &data->res.seq_res))
3148 return data->write_done_cb(task, data);
3151 /* Reset the the nfs_write_data to send the write to the MDS. */
3152 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3154 dprintk("%s Reset task for i/o through\n", __func__);
3155 put_lseg(data->lseg);
3157 data->ds_clp = NULL;
3158 data->write_done_cb = nfs4_write_done_cb;
3159 data->args.fh = NFS_FH(data->inode);
3160 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3161 data->args.offset = data->mds_offset;
3162 data->res.fattr = &data->fattr;
3163 task->tk_ops = data->mds_ops;
3164 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3166 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3168 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3170 struct nfs_server *server = NFS_SERVER(data->inode);
3173 data->args.bitmask = NULL;
3174 data->res.fattr = NULL;
3176 data->args.bitmask = server->cache_consistency_bitmask;
3177 if (!data->write_done_cb)
3178 data->write_done_cb = nfs4_write_done_cb;
3179 data->res.server = server;
3180 data->timestamp = jiffies;
3182 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3185 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3187 struct inode *inode = data->inode;
3189 if (!nfs4_sequence_done(task, &data->res.seq_res))
3192 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3193 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3196 nfs_refresh_inode(inode, data->res.fattr);
3200 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3202 struct nfs_server *server = NFS_SERVER(data->inode);
3204 data->args.bitmask = server->cache_consistency_bitmask;
3205 data->res.server = server;
3206 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3209 struct nfs4_renewdata {
3210 struct nfs_client *client;
3211 unsigned long timestamp;
3215 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3216 * standalone procedure for queueing an asynchronous RENEW.
3218 static void nfs4_renew_release(void *calldata)
3220 struct nfs4_renewdata *data = calldata;
3221 struct nfs_client *clp = data->client;
3223 if (atomic_read(&clp->cl_count) > 1)
3224 nfs4_schedule_state_renewal(clp);
3225 nfs_put_client(clp);
3229 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3231 struct nfs4_renewdata *data = calldata;
3232 struct nfs_client *clp = data->client;
3233 unsigned long timestamp = data->timestamp;
3235 if (task->tk_status < 0) {
3236 /* Unless we're shutting down, schedule state recovery! */
3237 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3238 nfs4_schedule_lease_recovery(clp);
3241 do_renew_lease(clp, timestamp);
3244 static const struct rpc_call_ops nfs4_renew_ops = {
3245 .rpc_call_done = nfs4_renew_done,
3246 .rpc_release = nfs4_renew_release,
3249 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3251 struct rpc_message msg = {
3252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3256 struct nfs4_renewdata *data;
3258 if (!atomic_inc_not_zero(&clp->cl_count))
3260 data = kmalloc(sizeof(*data), GFP_KERNEL);
3264 data->timestamp = jiffies;
3265 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3266 &nfs4_renew_ops, data);
3269 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3271 struct rpc_message msg = {
3272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3276 unsigned long now = jiffies;
3279 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3282 do_renew_lease(clp, now);
3286 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3288 return (server->caps & NFS_CAP_ACLS)
3289 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3290 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3293 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3294 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3297 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3299 static void buf_to_pages(const void *buf, size_t buflen,
3300 struct page **pages, unsigned int *pgbase)
3302 const void *p = buf;
3304 *pgbase = offset_in_page(buf);
3306 while (p < buf + buflen) {
3307 *(pages++) = virt_to_page(p);
3308 p += PAGE_CACHE_SIZE;
3312 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3313 struct page **pages, unsigned int *pgbase)
3315 struct page *newpage, **spages;
3321 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3322 newpage = alloc_page(GFP_KERNEL);
3324 if (newpage == NULL)
3326 memcpy(page_address(newpage), buf, len);
3331 } while (buflen != 0);
3337 __free_page(spages[rc-1]);
3341 struct nfs4_cached_acl {
3347 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3349 struct nfs_inode *nfsi = NFS_I(inode);
3351 spin_lock(&inode->i_lock);
3352 kfree(nfsi->nfs4_acl);
3353 nfsi->nfs4_acl = acl;
3354 spin_unlock(&inode->i_lock);
3357 static void nfs4_zap_acl_attr(struct inode *inode)
3359 nfs4_set_cached_acl(inode, NULL);
3362 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3364 struct nfs_inode *nfsi = NFS_I(inode);
3365 struct nfs4_cached_acl *acl;
3368 spin_lock(&inode->i_lock);
3369 acl = nfsi->nfs4_acl;
3372 if (buf == NULL) /* user is just asking for length */
3374 if (acl->cached == 0)
3376 ret = -ERANGE; /* see getxattr(2) man page */
3377 if (acl->len > buflen)
3379 memcpy(buf, acl->data, acl->len);
3383 spin_unlock(&inode->i_lock);
3387 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3389 struct nfs4_cached_acl *acl;
3391 if (buf && acl_len <= PAGE_SIZE) {
3392 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3396 memcpy(acl->data, buf, acl_len);
3398 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3405 nfs4_set_cached_acl(inode, acl);
3408 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3410 struct page *pages[NFS4ACL_MAXPAGES];
3411 struct nfs_getaclargs args = {
3412 .fh = NFS_FH(inode),
3416 struct nfs_getaclres res = {
3420 struct rpc_message msg = {
3421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3425 struct page *localpage = NULL;
3428 if (buflen < PAGE_SIZE) {
3429 /* As long as we're doing a round trip to the server anyway,
3430 * let's be prepared for a page of acl data. */
3431 localpage = alloc_page(GFP_KERNEL);
3432 resp_buf = page_address(localpage);
3433 if (localpage == NULL)
3435 args.acl_pages[0] = localpage;
3436 args.acl_pgbase = 0;
3437 args.acl_len = PAGE_SIZE;
3440 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3442 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3445 if (res.acl_len > args.acl_len)
3446 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3448 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3451 if (res.acl_len > buflen)
3454 memcpy(buf, resp_buf, res.acl_len);
3459 __free_page(localpage);
3463 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3465 struct nfs4_exception exception = { };
3468 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3471 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3472 } while (exception.retry);
3476 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3478 struct nfs_server *server = NFS_SERVER(inode);
3481 if (!nfs4_server_supports_acls(server))
3483 ret = nfs_revalidate_inode(server, inode);
3486 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3487 nfs_zap_acl_cache(inode);
3488 ret = nfs4_read_cached_acl(inode, buf, buflen);
3491 return nfs4_get_acl_uncached(inode, buf, buflen);
3494 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3496 struct nfs_server *server = NFS_SERVER(inode);
3497 struct page *pages[NFS4ACL_MAXPAGES];
3498 struct nfs_setaclargs arg = {
3499 .fh = NFS_FH(inode),
3503 struct nfs_setaclres res;
3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3511 if (!nfs4_server_supports_acls(server))
3513 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3516 nfs_inode_return_delegation(inode);
3517 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3520 * Free each page after tx, so the only ref left is
3521 * held by the network stack
3524 put_page(pages[i-1]);
3527 * Acl update can result in inode attribute update.
3528 * so mark the attribute cache invalid.
3530 spin_lock(&inode->i_lock);
3531 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3532 spin_unlock(&inode->i_lock);
3533 nfs_access_zap_cache(inode);
3534 nfs_zap_acl_cache(inode);
3538 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3540 struct nfs4_exception exception = { };
3543 err = nfs4_handle_exception(NFS_SERVER(inode),
3544 __nfs4_proc_set_acl(inode, buf, buflen),
3546 } while (exception.retry);
3551 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3553 struct nfs_client *clp = server->nfs_client;
3555 if (task->tk_status >= 0)
3557 switch(task->tk_status) {
3558 case -NFS4ERR_ADMIN_REVOKED:
3559 case -NFS4ERR_BAD_STATEID:
3560 case -NFS4ERR_OPENMODE:
3563 nfs4_schedule_stateid_recovery(server, state);
3564 goto wait_on_recovery;
3565 case -NFS4ERR_STALE_STATEID:
3566 case -NFS4ERR_STALE_CLIENTID:
3567 case -NFS4ERR_EXPIRED:
3568 nfs4_schedule_lease_recovery(clp);
3569 goto wait_on_recovery;
3570 #if defined(CONFIG_NFS_V4_1)
3571 case -NFS4ERR_BADSESSION:
3572 case -NFS4ERR_BADSLOT:
3573 case -NFS4ERR_BAD_HIGH_SLOT:
3574 case -NFS4ERR_DEADSESSION:
3575 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3576 case -NFS4ERR_SEQ_FALSE_RETRY:
3577 case -NFS4ERR_SEQ_MISORDERED:
3578 dprintk("%s ERROR %d, Reset session\n", __func__,
3580 nfs4_schedule_session_recovery(clp->cl_session);
3581 task->tk_status = 0;
3583 #endif /* CONFIG_NFS_V4_1 */
3584 case -NFS4ERR_DELAY:
3585 nfs_inc_server_stats(server, NFSIOS_DELAY);
3586 case -NFS4ERR_GRACE:
3588 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3589 task->tk_status = 0;
3591 case -NFS4ERR_OLD_STATEID:
3592 task->tk_status = 0;
3595 task->tk_status = nfs4_map_errors(task->tk_status);
3598 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3599 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3600 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3601 task->tk_status = 0;
3605 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3606 unsigned short port, struct rpc_cred *cred,
3607 struct nfs4_setclientid_res *res)
3609 nfs4_verifier sc_verifier;
3610 struct nfs4_setclientid setclientid = {
3611 .sc_verifier = &sc_verifier,
3613 .sc_cb_ident = clp->cl_cb_ident,
3615 struct rpc_message msg = {
3616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3617 .rpc_argp = &setclientid,
3625 p = (__be32*)sc_verifier.data;
3626 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3627 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3630 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3631 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3633 rpc_peeraddr2str(clp->cl_rpcclient,
3635 rpc_peeraddr2str(clp->cl_rpcclient,
3637 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3638 clp->cl_id_uniquifier);
3639 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3640 sizeof(setclientid.sc_netid),
3641 rpc_peeraddr2str(clp->cl_rpcclient,
3642 RPC_DISPLAY_NETID));
3643 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3644 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3645 clp->cl_ipaddr, port >> 8, port & 255);
3647 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3648 if (status != -NFS4ERR_CLID_INUSE)
3653 ssleep(clp->cl_lease_time / HZ + 1);
3655 if (++clp->cl_id_uniquifier == 0)
3661 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3662 struct nfs4_setclientid_res *arg,
3663 struct rpc_cred *cred)
3665 struct nfs_fsinfo fsinfo;
3666 struct rpc_message msg = {
3667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3669 .rpc_resp = &fsinfo,
3676 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3678 spin_lock(&clp->cl_lock);
3679 clp->cl_lease_time = fsinfo.lease_time * HZ;
3680 clp->cl_last_renewal = now;
3681 spin_unlock(&clp->cl_lock);
3686 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3687 struct nfs4_setclientid_res *arg,
3688 struct rpc_cred *cred)
3693 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3697 case -NFS4ERR_RESOURCE:
3698 /* The IBM lawyers misread another document! */
3699 case -NFS4ERR_DELAY:
3700 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3706 struct nfs4_delegreturndata {
3707 struct nfs4_delegreturnargs args;
3708 struct nfs4_delegreturnres res;
3710 nfs4_stateid stateid;
3711 unsigned long timestamp;
3712 struct nfs_fattr fattr;
3716 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3718 struct nfs4_delegreturndata *data = calldata;
3720 if (!nfs4_sequence_done(task, &data->res.seq_res))
3723 switch (task->tk_status) {
3724 case -NFS4ERR_STALE_STATEID:
3725 case -NFS4ERR_EXPIRED:
3727 renew_lease(data->res.server, data->timestamp);
3730 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3732 nfs_restart_rpc(task, data->res.server->nfs_client);
3736 data->rpc_status = task->tk_status;
3739 static void nfs4_delegreturn_release(void *calldata)
3744 #if defined(CONFIG_NFS_V4_1)
3745 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3747 struct nfs4_delegreturndata *d_data;
3749 d_data = (struct nfs4_delegreturndata *)data;
3751 if (nfs4_setup_sequence(d_data->res.server,
3752 &d_data->args.seq_args,
3753 &d_data->res.seq_res, 1, task))
3755 rpc_call_start(task);
3757 #endif /* CONFIG_NFS_V4_1 */
3759 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3760 #if defined(CONFIG_NFS_V4_1)
3761 .rpc_call_prepare = nfs4_delegreturn_prepare,
3762 #endif /* CONFIG_NFS_V4_1 */
3763 .rpc_call_done = nfs4_delegreturn_done,
3764 .rpc_release = nfs4_delegreturn_release,
3767 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3769 struct nfs4_delegreturndata *data;
3770 struct nfs_server *server = NFS_SERVER(inode);
3771 struct rpc_task *task;
3772 struct rpc_message msg = {
3773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3776 struct rpc_task_setup task_setup_data = {
3777 .rpc_client = server->client,
3778 .rpc_message = &msg,
3779 .callback_ops = &nfs4_delegreturn_ops,
3780 .flags = RPC_TASK_ASYNC,
3784 data = kzalloc(sizeof(*data), GFP_NOFS);
3787 data->args.fhandle = &data->fh;
3788 data->args.stateid = &data->stateid;
3789 data->args.bitmask = server->attr_bitmask;
3790 nfs_copy_fh(&data->fh, NFS_FH(inode));
3791 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3792 data->res.fattr = &data->fattr;
3793 data->res.server = server;
3794 nfs_fattr_init(data->res.fattr);
3795 data->timestamp = jiffies;
3796 data->rpc_status = 0;
3798 task_setup_data.callback_data = data;
3799 msg.rpc_argp = &data->args;
3800 msg.rpc_resp = &data->res;
3801 task = rpc_run_task(&task_setup_data);
3803 return PTR_ERR(task);
3806 status = nfs4_wait_for_completion_rpc_task(task);
3809 status = data->rpc_status;
3812 nfs_refresh_inode(inode, &data->fattr);
3818 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3820 struct nfs_server *server = NFS_SERVER(inode);
3821 struct nfs4_exception exception = { };
3824 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3826 case -NFS4ERR_STALE_STATEID:
3827 case -NFS4ERR_EXPIRED:
3831 err = nfs4_handle_exception(server, err, &exception);
3832 } while (exception.retry);
3836 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3837 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3840 * sleep, with exponential backoff, and retry the LOCK operation.
3842 static unsigned long
3843 nfs4_set_lock_task_retry(unsigned long timeout)
3845 schedule_timeout_killable(timeout);
3847 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3848 return NFS4_LOCK_MAXTIMEOUT;
3852 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3854 struct inode *inode = state->inode;
3855 struct nfs_server *server = NFS_SERVER(inode);
3856 struct nfs_client *clp = server->nfs_client;
3857 struct nfs_lockt_args arg = {
3858 .fh = NFS_FH(inode),
3861 struct nfs_lockt_res res = {
3864 struct rpc_message msg = {
3865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3868 .rpc_cred = state->owner->so_cred,
3870 struct nfs4_lock_state *lsp;
3873 arg.lock_owner.clientid = clp->cl_clientid;
3874 status = nfs4_set_lock_state(state, request);
3877 lsp = request->fl_u.nfs4_fl.owner;
3878 arg.lock_owner.id = lsp->ls_id.id;
3879 arg.lock_owner.s_dev = server->s_dev;
3880 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3883 request->fl_type = F_UNLCK;
3885 case -NFS4ERR_DENIED:
3888 request->fl_ops->fl_release_private(request);
3893 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3895 struct nfs4_exception exception = { };
3899 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3900 _nfs4_proc_getlk(state, cmd, request),
3902 } while (exception.retry);
3906 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3909 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3911 res = posix_lock_file_wait(file, fl);
3914 res = flock_lock_file_wait(file, fl);
3922 struct nfs4_unlockdata {
3923 struct nfs_locku_args arg;
3924 struct nfs_locku_res res;
3925 struct nfs4_lock_state *lsp;
3926 struct nfs_open_context *ctx;
3927 struct file_lock fl;
3928 const struct nfs_server *server;
3929 unsigned long timestamp;
3932 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3933 struct nfs_open_context *ctx,
3934 struct nfs4_lock_state *lsp,
3935 struct nfs_seqid *seqid)
3937 struct nfs4_unlockdata *p;
3938 struct inode *inode = lsp->ls_state->inode;
3940 p = kzalloc(sizeof(*p), GFP_NOFS);
3943 p->arg.fh = NFS_FH(inode);
3945 p->arg.seqid = seqid;
3946 p->res.seqid = seqid;
3947 p->arg.stateid = &lsp->ls_stateid;
3949 atomic_inc(&lsp->ls_count);
3950 /* Ensure we don't close file until we're done freeing locks! */
3951 p->ctx = get_nfs_open_context(ctx);
3952 memcpy(&p->fl, fl, sizeof(p->fl));
3953 p->server = NFS_SERVER(inode);
3957 static void nfs4_locku_release_calldata(void *data)
3959 struct nfs4_unlockdata *calldata = data;
3960 nfs_free_seqid(calldata->arg.seqid);
3961 nfs4_put_lock_state(calldata->lsp);
3962 put_nfs_open_context(calldata->ctx);
3966 static void nfs4_locku_done(struct rpc_task *task, void *data)
3968 struct nfs4_unlockdata *calldata = data;
3970 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3972 switch (task->tk_status) {
3974 memcpy(calldata->lsp->ls_stateid.data,
3975 calldata->res.stateid.data,
3976 sizeof(calldata->lsp->ls_stateid.data));
3977 renew_lease(calldata->server, calldata->timestamp);
3979 case -NFS4ERR_BAD_STATEID:
3980 case -NFS4ERR_OLD_STATEID:
3981 case -NFS4ERR_STALE_STATEID:
3982 case -NFS4ERR_EXPIRED:
3985 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3986 nfs_restart_rpc(task,
3987 calldata->server->nfs_client);
3991 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3993 struct nfs4_unlockdata *calldata = data;
3995 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3997 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3998 /* Note: exit _without_ running nfs4_locku_done */
3999 task->tk_action = NULL;
4002 calldata->timestamp = jiffies;
4003 if (nfs4_setup_sequence(calldata->server,
4004 &calldata->arg.seq_args,
4005 &calldata->res.seq_res, 1, task))
4007 rpc_call_start(task);
4010 static const struct rpc_call_ops nfs4_locku_ops = {
4011 .rpc_call_prepare = nfs4_locku_prepare,
4012 .rpc_call_done = nfs4_locku_done,
4013 .rpc_release = nfs4_locku_release_calldata,
4016 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4017 struct nfs_open_context *ctx,
4018 struct nfs4_lock_state *lsp,
4019 struct nfs_seqid *seqid)
4021 struct nfs4_unlockdata *data;
4022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4024 .rpc_cred = ctx->cred,
4026 struct rpc_task_setup task_setup_data = {
4027 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4028 .rpc_message = &msg,
4029 .callback_ops = &nfs4_locku_ops,
4030 .workqueue = nfsiod_workqueue,
4031 .flags = RPC_TASK_ASYNC,
4034 /* Ensure this is an unlock - when canceling a lock, the
4035 * canceled lock is passed in, and it won't be an unlock.
4037 fl->fl_type = F_UNLCK;
4039 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4041 nfs_free_seqid(seqid);
4042 return ERR_PTR(-ENOMEM);
4045 msg.rpc_argp = &data->arg;
4046 msg.rpc_resp = &data->res;
4047 task_setup_data.callback_data = data;
4048 return rpc_run_task(&task_setup_data);
4051 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4053 struct nfs_inode *nfsi = NFS_I(state->inode);
4054 struct nfs_seqid *seqid;
4055 struct nfs4_lock_state *lsp;
4056 struct rpc_task *task;
4058 unsigned char fl_flags = request->fl_flags;
4060 status = nfs4_set_lock_state(state, request);
4061 /* Unlock _before_ we do the RPC call */
4062 request->fl_flags |= FL_EXISTS;
4063 down_read(&nfsi->rwsem);
4064 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4065 up_read(&nfsi->rwsem);
4068 up_read(&nfsi->rwsem);
4071 /* Is this a delegated lock? */
4072 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4074 lsp = request->fl_u.nfs4_fl.owner;
4075 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4079 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4080 status = PTR_ERR(task);
4083 status = nfs4_wait_for_completion_rpc_task(task);
4086 request->fl_flags = fl_flags;
4090 struct nfs4_lockdata {
4091 struct nfs_lock_args arg;
4092 struct nfs_lock_res res;
4093 struct nfs4_lock_state *lsp;
4094 struct nfs_open_context *ctx;
4095 struct file_lock fl;
4096 unsigned long timestamp;
4099 struct nfs_server *server;
4102 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4103 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4106 struct nfs4_lockdata *p;
4107 struct inode *inode = lsp->ls_state->inode;
4108 struct nfs_server *server = NFS_SERVER(inode);
4110 p = kzalloc(sizeof(*p), gfp_mask);
4114 p->arg.fh = NFS_FH(inode);
4116 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4117 if (p->arg.open_seqid == NULL)
4119 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4120 if (p->arg.lock_seqid == NULL)
4121 goto out_free_seqid;
4122 p->arg.lock_stateid = &lsp->ls_stateid;
4123 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4124 p->arg.lock_owner.id = lsp->ls_id.id;
4125 p->arg.lock_owner.s_dev = server->s_dev;
4126 p->res.lock_seqid = p->arg.lock_seqid;
4129 atomic_inc(&lsp->ls_count);
4130 p->ctx = get_nfs_open_context(ctx);
4131 memcpy(&p->fl, fl, sizeof(p->fl));
4134 nfs_free_seqid(p->arg.open_seqid);
4140 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4142 struct nfs4_lockdata *data = calldata;
4143 struct nfs4_state *state = data->lsp->ls_state;
4145 dprintk("%s: begin!\n", __func__);
4146 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4148 /* Do we need to do an open_to_lock_owner? */
4149 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4150 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4152 data->arg.open_stateid = &state->stateid;
4153 data->arg.new_lock_owner = 1;
4154 data->res.open_seqid = data->arg.open_seqid;
4156 data->arg.new_lock_owner = 0;
4157 data->timestamp = jiffies;
4158 if (nfs4_setup_sequence(data->server,
4159 &data->arg.seq_args,
4160 &data->res.seq_res, 1, task))
4162 rpc_call_start(task);
4163 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4166 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4168 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4169 nfs4_lock_prepare(task, calldata);
4172 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4174 struct nfs4_lockdata *data = calldata;
4176 dprintk("%s: begin!\n", __func__);
4178 if (!nfs4_sequence_done(task, &data->res.seq_res))
4181 data->rpc_status = task->tk_status;
4182 if (data->arg.new_lock_owner != 0) {
4183 if (data->rpc_status == 0)
4184 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4188 if (data->rpc_status == 0) {
4189 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4190 sizeof(data->lsp->ls_stateid.data));
4191 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4192 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4195 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4198 static void nfs4_lock_release(void *calldata)
4200 struct nfs4_lockdata *data = calldata;
4202 dprintk("%s: begin!\n", __func__);
4203 nfs_free_seqid(data->arg.open_seqid);
4204 if (data->cancelled != 0) {
4205 struct rpc_task *task;
4206 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4207 data->arg.lock_seqid);
4209 rpc_put_task_async(task);
4210 dprintk("%s: cancelling lock!\n", __func__);
4212 nfs_free_seqid(data->arg.lock_seqid);
4213 nfs4_put_lock_state(data->lsp);
4214 put_nfs_open_context(data->ctx);
4216 dprintk("%s: done!\n", __func__);
4219 static const struct rpc_call_ops nfs4_lock_ops = {
4220 .rpc_call_prepare = nfs4_lock_prepare,
4221 .rpc_call_done = nfs4_lock_done,
4222 .rpc_release = nfs4_lock_release,
4225 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4226 .rpc_call_prepare = nfs4_recover_lock_prepare,
4227 .rpc_call_done = nfs4_lock_done,
4228 .rpc_release = nfs4_lock_release,
4231 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4234 case -NFS4ERR_ADMIN_REVOKED:
4235 case -NFS4ERR_BAD_STATEID:
4236 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4237 if (new_lock_owner != 0 ||
4238 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4239 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4241 case -NFS4ERR_STALE_STATEID:
4242 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4243 case -NFS4ERR_EXPIRED:
4244 nfs4_schedule_lease_recovery(server->nfs_client);
4248 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4250 struct nfs4_lockdata *data;
4251 struct rpc_task *task;
4252 struct rpc_message msg = {
4253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4254 .rpc_cred = state->owner->so_cred,
4256 struct rpc_task_setup task_setup_data = {
4257 .rpc_client = NFS_CLIENT(state->inode),
4258 .rpc_message = &msg,
4259 .callback_ops = &nfs4_lock_ops,
4260 .workqueue = nfsiod_workqueue,
4261 .flags = RPC_TASK_ASYNC,
4265 dprintk("%s: begin!\n", __func__);
4266 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4267 fl->fl_u.nfs4_fl.owner,
4268 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4272 data->arg.block = 1;
4273 if (recovery_type > NFS_LOCK_NEW) {
4274 if (recovery_type == NFS_LOCK_RECLAIM)
4275 data->arg.reclaim = NFS_LOCK_RECLAIM;
4276 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4278 msg.rpc_argp = &data->arg;
4279 msg.rpc_resp = &data->res;
4280 task_setup_data.callback_data = data;
4281 task = rpc_run_task(&task_setup_data);
4283 return PTR_ERR(task);
4284 ret = nfs4_wait_for_completion_rpc_task(task);
4286 ret = data->rpc_status;
4288 nfs4_handle_setlk_error(data->server, data->lsp,
4289 data->arg.new_lock_owner, ret);
4291 data->cancelled = 1;
4293 dprintk("%s: done, ret = %d!\n", __func__, ret);
4297 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4299 struct nfs_server *server = NFS_SERVER(state->inode);
4300 struct nfs4_exception exception = { };
4304 /* Cache the lock if possible... */
4305 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4307 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4308 if (err != -NFS4ERR_DELAY)
4310 nfs4_handle_exception(server, err, &exception);
4311 } while (exception.retry);
4315 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4317 struct nfs_server *server = NFS_SERVER(state->inode);
4318 struct nfs4_exception exception = { };
4321 err = nfs4_set_lock_state(state, request);
4325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4327 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4331 case -NFS4ERR_GRACE:
4332 case -NFS4ERR_DELAY:
4333 nfs4_handle_exception(server, err, &exception);
4336 } while (exception.retry);
4341 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4343 struct nfs_inode *nfsi = NFS_I(state->inode);
4344 unsigned char fl_flags = request->fl_flags;
4345 int status = -ENOLCK;
4347 if ((fl_flags & FL_POSIX) &&
4348 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4350 /* Is this a delegated open? */
4351 status = nfs4_set_lock_state(state, request);
4354 request->fl_flags |= FL_ACCESS;
4355 status = do_vfs_lock(request->fl_file, request);
4358 down_read(&nfsi->rwsem);
4359 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4360 /* Yes: cache locks! */
4361 /* ...but avoid races with delegation recall... */
4362 request->fl_flags = fl_flags & ~FL_SLEEP;
4363 status = do_vfs_lock(request->fl_file, request);
4366 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4369 /* Note: we always want to sleep here! */
4370 request->fl_flags = fl_flags | FL_SLEEP;
4371 if (do_vfs_lock(request->fl_file, request) < 0)
4372 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4374 up_read(&nfsi->rwsem);
4376 request->fl_flags = fl_flags;
4380 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4382 struct nfs4_exception exception = { };
4386 err = _nfs4_proc_setlk(state, cmd, request);
4387 if (err == -NFS4ERR_DENIED)
4389 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4391 } while (exception.retry);
4396 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4398 struct nfs_open_context *ctx;
4399 struct nfs4_state *state;
4400 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4403 /* verify open state */
4404 ctx = nfs_file_open_context(filp);
4407 if (request->fl_start < 0 || request->fl_end < 0)
4410 if (IS_GETLK(cmd)) {
4412 return nfs4_proc_getlk(state, F_GETLK, request);
4416 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4419 if (request->fl_type == F_UNLCK) {
4421 return nfs4_proc_unlck(state, cmd, request);
4428 status = nfs4_proc_setlk(state, cmd, request);
4429 if ((status != -EAGAIN) || IS_SETLK(cmd))
4431 timeout = nfs4_set_lock_task_retry(timeout);
4432 status = -ERESTARTSYS;
4435 } while(status < 0);
4439 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4441 struct nfs_server *server = NFS_SERVER(state->inode);
4442 struct nfs4_exception exception = { };
4445 err = nfs4_set_lock_state(state, fl);
4449 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4452 printk(KERN_ERR "%s: unhandled error %d.\n",
4457 case -NFS4ERR_EXPIRED:
4458 case -NFS4ERR_STALE_CLIENTID:
4459 case -NFS4ERR_STALE_STATEID:
4460 nfs4_schedule_lease_recovery(server->nfs_client);
4462 case -NFS4ERR_BADSESSION:
4463 case -NFS4ERR_BADSLOT:
4464 case -NFS4ERR_BAD_HIGH_SLOT:
4465 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4466 case -NFS4ERR_DEADSESSION:
4467 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4471 * The show must go on: exit, but mark the
4472 * stateid as needing recovery.
4474 case -NFS4ERR_ADMIN_REVOKED:
4475 case -NFS4ERR_BAD_STATEID:
4476 case -NFS4ERR_OPENMODE:
4477 nfs4_schedule_stateid_recovery(server, state);
4482 * User RPCSEC_GSS context has expired.
4483 * We cannot recover this stateid now, so
4484 * skip it and allow recovery thread to
4490 case -NFS4ERR_DENIED:
4491 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4494 case -NFS4ERR_DELAY:
4497 err = nfs4_handle_exception(server, err, &exception);
4498 } while (exception.retry);
4503 static void nfs4_release_lockowner_release(void *calldata)
4508 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4509 .rpc_release = nfs4_release_lockowner_release,
4512 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4514 struct nfs_server *server = lsp->ls_state->owner->so_server;
4515 struct nfs_release_lockowner_args *args;
4516 struct rpc_message msg = {
4517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4520 if (server->nfs_client->cl_mvops->minor_version != 0)
4522 args = kmalloc(sizeof(*args), GFP_NOFS);
4525 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4526 args->lock_owner.id = lsp->ls_id.id;
4527 args->lock_owner.s_dev = server->s_dev;
4528 msg.rpc_argp = args;
4529 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4532 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4534 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4535 const void *buf, size_t buflen,
4536 int flags, int type)
4538 if (strcmp(key, "") != 0)
4541 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4544 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4545 void *buf, size_t buflen, int type)
4547 if (strcmp(key, "") != 0)
4550 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4553 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4554 size_t list_len, const char *name,
4555 size_t name_len, int type)
4557 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4559 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4562 if (list && len <= list_len)
4563 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4567 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4569 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4570 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4571 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4574 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4575 NFS_ATTR_FATTR_NLINK;
4576 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4580 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4581 struct nfs4_fs_locations *fs_locations, struct page *page)
4583 struct nfs_server *server = NFS_SERVER(dir);
4585 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4586 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4588 struct nfs4_fs_locations_arg args = {
4589 .dir_fh = NFS_FH(dir),
4594 struct nfs4_fs_locations_res res = {
4595 .fs_locations = fs_locations,
4597 struct rpc_message msg = {
4598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4604 dprintk("%s: start\n", __func__);
4605 nfs_fattr_init(&fs_locations->fattr);
4606 fs_locations->server = server;
4607 fs_locations->nlocations = 0;
4608 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4609 nfs_fixup_referral_attributes(&fs_locations->fattr);
4610 dprintk("%s: returned status = %d\n", __func__, status);
4614 #ifdef CONFIG_NFS_V4_1
4616 * Check the exchange flags returned by the server for invalid flags, having
4617 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4620 static int nfs4_check_cl_exchange_flags(u32 flags)
4622 if (flags & ~EXCHGID4_FLAG_MASK_R)
4624 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4625 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4627 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4631 return -NFS4ERR_INVAL;
4635 * nfs4_proc_exchange_id()
4637 * Since the clientid has expired, all compounds using sessions
4638 * associated with the stale clientid will be returning
4639 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4640 * be in some phase of session reset.
4642 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4644 nfs4_verifier verifier;
4645 struct nfs41_exchange_id_args args = {
4647 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4649 struct nfs41_exchange_id_res res = {
4653 struct rpc_message msg = {
4654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4661 dprintk("--> %s\n", __func__);
4662 BUG_ON(clp == NULL);
4664 p = (u32 *)verifier.data;
4665 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4666 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4667 args.verifier = &verifier;
4669 args.id_len = scnprintf(args.id, sizeof(args.id),
4672 init_utsname()->nodename,
4673 init_utsname()->domainname,
4674 clp->cl_rpcclient->cl_auth->au_flavor);
4676 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4678 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4679 dprintk("<-- %s status= %d\n", __func__, status);
4683 struct nfs4_get_lease_time_data {
4684 struct nfs4_get_lease_time_args *args;
4685 struct nfs4_get_lease_time_res *res;
4686 struct nfs_client *clp;
4689 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4693 struct nfs4_get_lease_time_data *data =
4694 (struct nfs4_get_lease_time_data *)calldata;
4696 dprintk("--> %s\n", __func__);
4697 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4698 /* just setup sequence, do not trigger session recovery
4699 since we're invoked within one */
4700 ret = nfs41_setup_sequence(data->clp->cl_session,
4701 &data->args->la_seq_args,
4702 &data->res->lr_seq_res, 0, task);
4704 BUG_ON(ret == -EAGAIN);
4705 rpc_call_start(task);
4706 dprintk("<-- %s\n", __func__);
4710 * Called from nfs4_state_manager thread for session setup, so don't recover
4711 * from sequence operation or clientid errors.
4713 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4715 struct nfs4_get_lease_time_data *data =
4716 (struct nfs4_get_lease_time_data *)calldata;
4718 dprintk("--> %s\n", __func__);
4719 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4721 switch (task->tk_status) {
4722 case -NFS4ERR_DELAY:
4723 case -NFS4ERR_GRACE:
4724 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4725 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4726 task->tk_status = 0;
4727 nfs_restart_rpc(task, data->clp);
4730 dprintk("<-- %s\n", __func__);
4733 struct rpc_call_ops nfs4_get_lease_time_ops = {
4734 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4735 .rpc_call_done = nfs4_get_lease_time_done,
4738 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4740 struct rpc_task *task;
4741 struct nfs4_get_lease_time_args args;
4742 struct nfs4_get_lease_time_res res = {
4743 .lr_fsinfo = fsinfo,
4745 struct nfs4_get_lease_time_data data = {
4750 struct rpc_message msg = {
4751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4755 struct rpc_task_setup task_setup = {
4756 .rpc_client = clp->cl_rpcclient,
4757 .rpc_message = &msg,
4758 .callback_ops = &nfs4_get_lease_time_ops,
4759 .callback_data = &data
4763 dprintk("--> %s\n", __func__);
4764 task = rpc_run_task(&task_setup);
4767 status = PTR_ERR(task);
4769 status = task->tk_status;
4772 dprintk("<-- %s return %d\n", __func__, status);
4778 * Reset a slot table
4780 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4783 struct nfs4_slot *new = NULL;
4787 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4788 max_reqs, tbl->max_slots);
4790 /* Does the newly negotiated max_reqs match the existing slot table? */
4791 if (max_reqs != tbl->max_slots) {
4793 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4800 spin_lock(&tbl->slot_tbl_lock);
4803 tbl->max_slots = max_reqs;
4805 for (i = 0; i < tbl->max_slots; ++i)
4806 tbl->slots[i].seq_nr = ivalue;
4807 spin_unlock(&tbl->slot_tbl_lock);
4808 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4809 tbl, tbl->slots, tbl->max_slots);
4811 dprintk("<-- %s: return %d\n", __func__, ret);
4816 * Reset the forechannel and backchannel slot tables
4818 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4822 status = nfs4_reset_slot_table(&session->fc_slot_table,
4823 session->fc_attrs.max_reqs, 1);
4827 status = nfs4_reset_slot_table(&session->bc_slot_table,
4828 session->bc_attrs.max_reqs, 0);
4832 /* Destroy the slot table */
4833 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4835 if (session->fc_slot_table.slots != NULL) {
4836 kfree(session->fc_slot_table.slots);
4837 session->fc_slot_table.slots = NULL;
4839 if (session->bc_slot_table.slots != NULL) {
4840 kfree(session->bc_slot_table.slots);
4841 session->bc_slot_table.slots = NULL;
4847 * Initialize slot table
4849 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4850 int max_slots, int ivalue)
4852 struct nfs4_slot *slot;
4855 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4857 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4859 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4864 spin_lock(&tbl->slot_tbl_lock);
4865 tbl->max_slots = max_slots;
4867 tbl->highest_used_slotid = -1; /* no slot is currently used */
4868 spin_unlock(&tbl->slot_tbl_lock);
4869 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4870 tbl, tbl->slots, tbl->max_slots);
4872 dprintk("<-- %s: return %d\n", __func__, ret);
4877 * Initialize the forechannel and backchannel tables
4879 static int nfs4_init_slot_tables(struct nfs4_session *session)
4881 struct nfs4_slot_table *tbl;
4884 tbl = &session->fc_slot_table;
4885 if (tbl->slots == NULL) {
4886 status = nfs4_init_slot_table(tbl,
4887 session->fc_attrs.max_reqs, 1);
4892 tbl = &session->bc_slot_table;
4893 if (tbl->slots == NULL) {
4894 status = nfs4_init_slot_table(tbl,
4895 session->bc_attrs.max_reqs, 0);
4897 nfs4_destroy_slot_tables(session);
4903 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4905 struct nfs4_session *session;
4906 struct nfs4_slot_table *tbl;
4908 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4912 tbl = &session->fc_slot_table;
4913 tbl->highest_used_slotid = -1;
4914 spin_lock_init(&tbl->slot_tbl_lock);
4915 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4916 init_completion(&tbl->complete);
4918 tbl = &session->bc_slot_table;
4919 tbl->highest_used_slotid = -1;
4920 spin_lock_init(&tbl->slot_tbl_lock);
4921 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4922 init_completion(&tbl->complete);
4924 session->session_state = 1<<NFS4_SESSION_INITING;
4930 void nfs4_destroy_session(struct nfs4_session *session)
4932 nfs4_proc_destroy_session(session);
4933 dprintk("%s Destroy backchannel for xprt %p\n",
4934 __func__, session->clp->cl_rpcclient->cl_xprt);
4935 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4936 NFS41_BC_MIN_CALLBACKS);
4937 nfs4_destroy_slot_tables(session);
4942 * Initialize the values to be used by the client in CREATE_SESSION
4943 * If nfs4_init_session set the fore channel request and response sizes,
4946 * Set the back channel max_resp_sz_cached to zero to force the client to
4947 * always set csa_cachethis to FALSE because the current implementation
4948 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4950 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4952 struct nfs4_session *session = args->client->cl_session;
4953 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4954 mxresp_sz = session->fc_attrs.max_resp_sz;
4957 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4959 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4960 /* Fore channel attributes */
4961 args->fc_attrs.headerpadsz = 0;
4962 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4963 args->fc_attrs.max_resp_sz = mxresp_sz;
4964 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4965 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4967 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4968 "max_ops=%u max_reqs=%u\n",
4970 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4971 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4973 /* Back channel attributes */
4974 args->bc_attrs.headerpadsz = 0;
4975 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4976 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4977 args->bc_attrs.max_resp_sz_cached = 0;
4978 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4979 args->bc_attrs.max_reqs = 1;
4981 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4982 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4984 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4985 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4986 args->bc_attrs.max_reqs);
4989 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4991 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4992 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4994 if (rcvd->headerpadsz > sent->headerpadsz)
4996 if (rcvd->max_resp_sz > sent->max_resp_sz)
4999 * Our requested max_ops is the minimum we need; we're not
5000 * prepared to break up compounds into smaller pieces than that.
5001 * So, no point even trying to continue if the server won't
5004 if (rcvd->max_ops < sent->max_ops)
5006 if (rcvd->max_reqs == 0)
5011 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5013 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5014 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5016 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5018 if (rcvd->max_resp_sz < sent->max_resp_sz)
5020 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5022 /* These would render the backchannel useless: */
5023 if (rcvd->max_ops == 0)
5025 if (rcvd->max_reqs == 0)
5030 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5031 struct nfs4_session *session)
5035 ret = nfs4_verify_fore_channel_attrs(args, session);
5038 return nfs4_verify_back_channel_attrs(args, session);
5041 static int _nfs4_proc_create_session(struct nfs_client *clp)
5043 struct nfs4_session *session = clp->cl_session;
5044 struct nfs41_create_session_args args = {
5046 .cb_program = NFS4_CALLBACK,
5048 struct nfs41_create_session_res res = {
5051 struct rpc_message msg = {
5052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5058 nfs4_init_channel_attrs(&args);
5059 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5061 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5064 /* Verify the session's negotiated channel_attrs values */
5065 status = nfs4_verify_channel_attrs(&args, session);
5067 /* Increment the clientid slot sequence id */
5075 * Issues a CREATE_SESSION operation to the server.
5076 * It is the responsibility of the caller to verify the session is
5077 * expired before calling this routine.
5079 int nfs4_proc_create_session(struct nfs_client *clp)
5083 struct nfs4_session *session = clp->cl_session;
5087 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5090 status = _nfs4_proc_create_session(clp);
5091 if (status == -NFS4ERR_DELAY) {
5092 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5096 } while (status == -NFS4ERR_DELAY);
5101 /* Init and reset the fore channel */
5102 status = nfs4_init_slot_tables(session);
5103 dprintk("slot table initialization returned %d\n", status);
5106 status = nfs4_reset_slot_tables(session);
5107 dprintk("slot table reset returned %d\n", status);
5111 ptr = (unsigned *)&session->sess_id.data[0];
5112 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5113 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5115 dprintk("<-- %s\n", __func__);
5120 * Issue the over-the-wire RPC DESTROY_SESSION.
5121 * The caller must serialize access to this routine.
5123 int nfs4_proc_destroy_session(struct nfs4_session *session)
5126 struct rpc_message msg;
5128 dprintk("--> nfs4_proc_destroy_session\n");
5130 /* session is still being setup */
5131 if (session->clp->cl_cons_state != NFS_CS_READY)
5134 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5135 msg.rpc_argp = session;
5136 msg.rpc_resp = NULL;
5137 msg.rpc_cred = NULL;
5138 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5142 "Got error %d from the server on DESTROY_SESSION. "
5143 "Session has been destroyed regardless...\n", status);
5145 dprintk("<-- nfs4_proc_destroy_session\n");
5149 int nfs4_init_session(struct nfs_server *server)
5151 struct nfs_client *clp = server->nfs_client;
5152 struct nfs4_session *session;
5153 unsigned int rsize, wsize;
5156 if (!nfs4_has_session(clp))
5159 session = clp->cl_session;
5160 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5163 rsize = server->rsize;
5165 rsize = NFS_MAX_FILE_IO_SIZE;
5166 wsize = server->wsize;
5168 wsize = NFS_MAX_FILE_IO_SIZE;
5170 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5171 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5173 ret = nfs4_recover_expired_lease(server);
5175 ret = nfs4_check_client_ready(clp);
5179 int nfs4_init_ds_session(struct nfs_client *clp)
5181 struct nfs4_session *session = clp->cl_session;
5184 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5187 ret = nfs4_client_recover_expired_lease(clp);
5189 /* Test for the DS role */
5190 if (!is_ds_client(clp))
5193 ret = nfs4_check_client_ready(clp);
5197 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5201 * Renew the cl_session lease.
5203 struct nfs4_sequence_data {
5204 struct nfs_client *clp;
5205 struct nfs4_sequence_args args;
5206 struct nfs4_sequence_res res;
5209 static void nfs41_sequence_release(void *data)
5211 struct nfs4_sequence_data *calldata = data;
5212 struct nfs_client *clp = calldata->clp;
5214 if (atomic_read(&clp->cl_count) > 1)
5215 nfs4_schedule_state_renewal(clp);
5216 nfs_put_client(clp);
5220 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5222 switch(task->tk_status) {
5223 case -NFS4ERR_DELAY:
5224 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5227 nfs4_schedule_lease_recovery(clp);
5232 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5234 struct nfs4_sequence_data *calldata = data;
5235 struct nfs_client *clp = calldata->clp;
5237 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5240 if (task->tk_status < 0) {
5241 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5242 if (atomic_read(&clp->cl_count) == 1)
5245 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5246 rpc_restart_call_prepare(task);
5250 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5252 dprintk("<-- %s\n", __func__);
5255 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5257 struct nfs4_sequence_data *calldata = data;
5258 struct nfs_client *clp = calldata->clp;
5259 struct nfs4_sequence_args *args;
5260 struct nfs4_sequence_res *res;
5262 args = task->tk_msg.rpc_argp;
5263 res = task->tk_msg.rpc_resp;
5265 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5267 rpc_call_start(task);
5270 static const struct rpc_call_ops nfs41_sequence_ops = {
5271 .rpc_call_done = nfs41_sequence_call_done,
5272 .rpc_call_prepare = nfs41_sequence_prepare,
5273 .rpc_release = nfs41_sequence_release,
5276 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5278 struct nfs4_sequence_data *calldata;
5279 struct rpc_message msg = {
5280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5283 struct rpc_task_setup task_setup_data = {
5284 .rpc_client = clp->cl_rpcclient,
5285 .rpc_message = &msg,
5286 .callback_ops = &nfs41_sequence_ops,
5287 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5290 if (!atomic_inc_not_zero(&clp->cl_count))
5291 return ERR_PTR(-EIO);
5292 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5293 if (calldata == NULL) {
5294 nfs_put_client(clp);
5295 return ERR_PTR(-ENOMEM);
5297 msg.rpc_argp = &calldata->args;
5298 msg.rpc_resp = &calldata->res;
5299 calldata->clp = clp;
5300 task_setup_data.callback_data = calldata;
5302 return rpc_run_task(&task_setup_data);
5305 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5307 struct rpc_task *task;
5310 task = _nfs41_proc_sequence(clp, cred);
5312 ret = PTR_ERR(task);
5314 rpc_put_task_async(task);
5315 dprintk("<-- %s status=%d\n", __func__, ret);
5319 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5321 struct rpc_task *task;
5324 task = _nfs41_proc_sequence(clp, cred);
5326 ret = PTR_ERR(task);
5329 ret = rpc_wait_for_completion_task(task);
5331 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5333 if (task->tk_status == 0)
5334 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5335 ret = task->tk_status;
5339 dprintk("<-- %s status=%d\n", __func__, ret);
5343 struct nfs4_reclaim_complete_data {
5344 struct nfs_client *clp;
5345 struct nfs41_reclaim_complete_args arg;
5346 struct nfs41_reclaim_complete_res res;
5349 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5351 struct nfs4_reclaim_complete_data *calldata = data;
5353 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5354 if (nfs41_setup_sequence(calldata->clp->cl_session,
5355 &calldata->arg.seq_args,
5356 &calldata->res.seq_res, 0, task))
5359 rpc_call_start(task);
5362 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5364 switch(task->tk_status) {
5366 case -NFS4ERR_COMPLETE_ALREADY:
5367 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5369 case -NFS4ERR_DELAY:
5370 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5373 nfs4_schedule_lease_recovery(clp);
5378 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5380 struct nfs4_reclaim_complete_data *calldata = data;
5381 struct nfs_client *clp = calldata->clp;
5382 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5384 dprintk("--> %s\n", __func__);
5385 if (!nfs41_sequence_done(task, res))
5388 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5389 rpc_restart_call_prepare(task);
5392 dprintk("<-- %s\n", __func__);
5395 static void nfs4_free_reclaim_complete_data(void *data)
5397 struct nfs4_reclaim_complete_data *calldata = data;
5402 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5403 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5404 .rpc_call_done = nfs4_reclaim_complete_done,
5405 .rpc_release = nfs4_free_reclaim_complete_data,
5409 * Issue a global reclaim complete.
5411 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5413 struct nfs4_reclaim_complete_data *calldata;
5414 struct rpc_task *task;
5415 struct rpc_message msg = {
5416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5418 struct rpc_task_setup task_setup_data = {
5419 .rpc_client = clp->cl_rpcclient,
5420 .rpc_message = &msg,
5421 .callback_ops = &nfs4_reclaim_complete_call_ops,
5422 .flags = RPC_TASK_ASYNC,
5424 int status = -ENOMEM;
5426 dprintk("--> %s\n", __func__);
5427 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5428 if (calldata == NULL)
5430 calldata->clp = clp;
5431 calldata->arg.one_fs = 0;
5433 msg.rpc_argp = &calldata->arg;
5434 msg.rpc_resp = &calldata->res;
5435 task_setup_data.callback_data = calldata;
5436 task = rpc_run_task(&task_setup_data);
5438 status = PTR_ERR(task);
5441 status = nfs4_wait_for_completion_rpc_task(task);
5443 status = task->tk_status;
5447 dprintk("<-- %s status=%d\n", __func__, status);
5452 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5454 struct nfs4_layoutget *lgp = calldata;
5455 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5457 dprintk("--> %s\n", __func__);
5458 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5459 * right now covering the LAYOUTGET we are about to send.
5460 * However, that is not so catastrophic, and there seems
5461 * to be no way to prevent it completely.
5463 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5464 &lgp->res.seq_res, 0, task))
5466 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5467 NFS_I(lgp->args.inode)->layout,
5468 lgp->args.ctx->state)) {
5469 rpc_exit(task, NFS4_OK);
5472 rpc_call_start(task);
5475 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5477 struct nfs4_layoutget *lgp = calldata;
5478 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5480 dprintk("--> %s\n", __func__);
5482 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5485 switch (task->tk_status) {
5488 case -NFS4ERR_LAYOUTTRYLATER:
5489 case -NFS4ERR_RECALLCONFLICT:
5490 task->tk_status = -NFS4ERR_DELAY;
5493 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5494 rpc_restart_call_prepare(task);
5498 dprintk("<-- %s\n", __func__);
5501 static void nfs4_layoutget_release(void *calldata)
5503 struct nfs4_layoutget *lgp = calldata;
5505 dprintk("--> %s\n", __func__);
5506 if (lgp->res.layout.buf != NULL)
5507 free_page((unsigned long) lgp->res.layout.buf);
5508 put_nfs_open_context(lgp->args.ctx);
5510 dprintk("<-- %s\n", __func__);
5513 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5514 .rpc_call_prepare = nfs4_layoutget_prepare,
5515 .rpc_call_done = nfs4_layoutget_done,
5516 .rpc_release = nfs4_layoutget_release,
5519 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5521 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5522 struct rpc_task *task;
5523 struct rpc_message msg = {
5524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5525 .rpc_argp = &lgp->args,
5526 .rpc_resp = &lgp->res,
5528 struct rpc_task_setup task_setup_data = {
5529 .rpc_client = server->client,
5530 .rpc_message = &msg,
5531 .callback_ops = &nfs4_layoutget_call_ops,
5532 .callback_data = lgp,
5533 .flags = RPC_TASK_ASYNC,
5537 dprintk("--> %s\n", __func__);
5539 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5540 if (lgp->res.layout.buf == NULL) {
5541 nfs4_layoutget_release(lgp);
5545 lgp->res.seq_res.sr_slot = NULL;
5546 task = rpc_run_task(&task_setup_data);
5548 return PTR_ERR(task);
5549 status = nfs4_wait_for_completion_rpc_task(task);
5551 status = task->tk_status;
5553 status = pnfs_layout_process(lgp);
5555 dprintk("<-- %s status=%d\n", __func__, status);
5560 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5562 struct nfs4_getdeviceinfo_args args = {
5565 struct nfs4_getdeviceinfo_res res = {
5568 struct rpc_message msg = {
5569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5575 dprintk("--> %s\n", __func__);
5576 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5577 dprintk("<-- %s status=%d\n", __func__, status);
5582 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5584 struct nfs4_exception exception = { };
5588 err = nfs4_handle_exception(server,
5589 _nfs4_proc_getdeviceinfo(server, pdev),
5591 } while (exception.retry);
5594 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5596 #endif /* CONFIG_NFS_V4_1 */
5598 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5599 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5600 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5601 .recover_open = nfs4_open_reclaim,
5602 .recover_lock = nfs4_lock_reclaim,
5603 .establish_clid = nfs4_init_clientid,
5604 .get_clid_cred = nfs4_get_setclientid_cred,
5607 #if defined(CONFIG_NFS_V4_1)
5608 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5609 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5610 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5611 .recover_open = nfs4_open_reclaim,
5612 .recover_lock = nfs4_lock_reclaim,
5613 .establish_clid = nfs41_init_clientid,
5614 .get_clid_cred = nfs4_get_exchange_id_cred,
5615 .reclaim_complete = nfs41_proc_reclaim_complete,
5617 #endif /* CONFIG_NFS_V4_1 */
5619 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5620 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5621 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5622 .recover_open = nfs4_open_expired,
5623 .recover_lock = nfs4_lock_expired,
5624 .establish_clid = nfs4_init_clientid,
5625 .get_clid_cred = nfs4_get_setclientid_cred,
5628 #if defined(CONFIG_NFS_V4_1)
5629 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5630 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5631 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5632 .recover_open = nfs4_open_expired,
5633 .recover_lock = nfs4_lock_expired,
5634 .establish_clid = nfs41_init_clientid,
5635 .get_clid_cred = nfs4_get_exchange_id_cred,
5637 #endif /* CONFIG_NFS_V4_1 */
5639 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5640 .sched_state_renewal = nfs4_proc_async_renew,
5641 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5642 .renew_lease = nfs4_proc_renew,
5645 #if defined(CONFIG_NFS_V4_1)
5646 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5647 .sched_state_renewal = nfs41_proc_async_sequence,
5648 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5649 .renew_lease = nfs4_proc_sequence,
5653 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5655 .call_sync = _nfs4_call_sync,
5656 .validate_stateid = nfs4_validate_delegation_stateid,
5657 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5658 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5659 .state_renewal_ops = &nfs40_state_renewal_ops,
5662 #if defined(CONFIG_NFS_V4_1)
5663 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5665 .call_sync = _nfs4_call_sync_session,
5666 .validate_stateid = nfs41_validate_delegation_stateid,
5667 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5668 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5669 .state_renewal_ops = &nfs41_state_renewal_ops,
5673 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5674 [0] = &nfs_v4_0_minor_ops,
5675 #if defined(CONFIG_NFS_V4_1)
5676 [1] = &nfs_v4_1_minor_ops,
5680 static const struct inode_operations nfs4_file_inode_operations = {
5681 .permission = nfs_permission,
5682 .getattr = nfs_getattr,
5683 .setattr = nfs_setattr,
5684 .getxattr = generic_getxattr,
5685 .setxattr = generic_setxattr,
5686 .listxattr = generic_listxattr,
5687 .removexattr = generic_removexattr,
5690 const struct nfs_rpc_ops nfs_v4_clientops = {
5691 .version = 4, /* protocol version */
5692 .dentry_ops = &nfs4_dentry_operations,
5693 .dir_inode_ops = &nfs4_dir_inode_operations,
5694 .file_inode_ops = &nfs4_file_inode_operations,
5695 .getroot = nfs4_proc_get_root,
5696 .getattr = nfs4_proc_getattr,
5697 .setattr = nfs4_proc_setattr,
5698 .lookupfh = nfs4_proc_lookupfh,
5699 .lookup = nfs4_proc_lookup,
5700 .access = nfs4_proc_access,
5701 .readlink = nfs4_proc_readlink,
5702 .create = nfs4_proc_create,
5703 .remove = nfs4_proc_remove,
5704 .unlink_setup = nfs4_proc_unlink_setup,
5705 .unlink_done = nfs4_proc_unlink_done,
5706 .rename = nfs4_proc_rename,
5707 .rename_setup = nfs4_proc_rename_setup,
5708 .rename_done = nfs4_proc_rename_done,
5709 .link = nfs4_proc_link,
5710 .symlink = nfs4_proc_symlink,
5711 .mkdir = nfs4_proc_mkdir,
5712 .rmdir = nfs4_proc_remove,
5713 .readdir = nfs4_proc_readdir,
5714 .mknod = nfs4_proc_mknod,
5715 .statfs = nfs4_proc_statfs,
5716 .fsinfo = nfs4_proc_fsinfo,
5717 .pathconf = nfs4_proc_pathconf,
5718 .set_capabilities = nfs4_server_capabilities,
5719 .decode_dirent = nfs4_decode_dirent,
5720 .read_setup = nfs4_proc_read_setup,
5721 .read_done = nfs4_read_done,
5722 .write_setup = nfs4_proc_write_setup,
5723 .write_done = nfs4_write_done,
5724 .commit_setup = nfs4_proc_commit_setup,
5725 .commit_done = nfs4_commit_done,
5726 .lock = nfs4_proc_lock,
5727 .clear_acl_cache = nfs4_zap_acl_attr,
5728 .close_context = nfs4_close_context,
5729 .open_context = nfs4_atomic_open,
5730 .init_client = nfs4_init_client,
5733 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5734 .prefix = XATTR_NAME_NFSV4_ACL,
5735 .list = nfs4_xattr_list_nfs4_acl,
5736 .get = nfs4_xattr_get_nfs4_acl,
5737 .set = nfs4_xattr_set_nfs4_acl,
5740 const struct xattr_handler *nfs4_xattr_handlers[] = {
5741 &nfs4_xattr_nfs4_acl_handler,