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>
57 #include "delegation.h"
63 #define NFSDBG_FACILITY NFSDBG_PROC
65 #define NFS4_POLL_RETRY_MIN (HZ/10)
66 #define NFS4_POLL_RETRY_MAX (15*HZ)
68 #define NFS4_MAX_LOOP_ON_RECOVER (10)
71 static int _nfs4_proc_open(struct nfs4_opendata *data);
72 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
73 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
74 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
75 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
76 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
77 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
78 struct nfs_fattr *fattr, struct iattr *sattr,
79 struct nfs4_state *state);
81 /* Prevent leaks of NFSv4 errors into userland */
82 static int nfs4_map_errors(int err)
87 case -NFS4ERR_RESOURCE:
90 dprintk("%s could not handle NFSv4 error %d\n",
98 * This is our standard bitmap for GETATTR requests.
100 const u32 nfs4_fattr_bitmap[2] = {
102 | FATTR4_WORD0_CHANGE
105 | FATTR4_WORD0_FILEID,
107 | FATTR4_WORD1_NUMLINKS
109 | FATTR4_WORD1_OWNER_GROUP
110 | FATTR4_WORD1_RAWDEV
111 | FATTR4_WORD1_SPACE_USED
112 | FATTR4_WORD1_TIME_ACCESS
113 | FATTR4_WORD1_TIME_METADATA
114 | FATTR4_WORD1_TIME_MODIFY
117 const u32 nfs4_statfs_bitmap[2] = {
118 FATTR4_WORD0_FILES_AVAIL
119 | FATTR4_WORD0_FILES_FREE
120 | FATTR4_WORD0_FILES_TOTAL,
121 FATTR4_WORD1_SPACE_AVAIL
122 | FATTR4_WORD1_SPACE_FREE
123 | FATTR4_WORD1_SPACE_TOTAL
126 const u32 nfs4_pathconf_bitmap[2] = {
128 | FATTR4_WORD0_MAXNAME,
132 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
133 | FATTR4_WORD0_MAXREAD
134 | FATTR4_WORD0_MAXWRITE
135 | FATTR4_WORD0_LEASE_TIME,
136 FATTR4_WORD1_TIME_DELTA
137 | FATTR4_WORD1_FS_LAYOUT_TYPES
140 const u32 nfs4_fs_locations_bitmap[2] = {
142 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_FILEID
146 | FATTR4_WORD0_FS_LOCATIONS,
148 | FATTR4_WORD1_NUMLINKS
150 | FATTR4_WORD1_OWNER_GROUP
151 | FATTR4_WORD1_RAWDEV
152 | FATTR4_WORD1_SPACE_USED
153 | FATTR4_WORD1_TIME_ACCESS
154 | FATTR4_WORD1_TIME_METADATA
155 | FATTR4_WORD1_TIME_MODIFY
156 | FATTR4_WORD1_MOUNTED_ON_FILEID
159 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
160 struct nfs4_readdir_arg *readdir)
164 BUG_ON(readdir->count < 80);
166 readdir->cookie = cookie;
167 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
172 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
177 * NFSv4 servers do not return entries for '.' and '..'
178 * Therefore, we fake these entries here. We let '.'
179 * have cookie 0 and '..' have cookie 1. Note that
180 * when talking to the server, we always send cookie 0
183 start = p = kmap_atomic(*readdir->pages, KM_USER0);
186 *p++ = xdr_one; /* next */
187 *p++ = xdr_zero; /* cookie, first word */
188 *p++ = xdr_one; /* cookie, second word */
189 *p++ = xdr_one; /* entry len */
190 memcpy(p, ".\0\0\0", 4); /* entry */
192 *p++ = xdr_one; /* bitmap length */
193 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
194 *p++ = htonl(8); /* attribute buffer length */
195 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_two; /* cookie, second word */
201 *p++ = xdr_two; /* entry len */
202 memcpy(p, "..\0\0", 4); /* entry */
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
209 readdir->pgbase = (char *)p - (char *)start;
210 readdir->count -= readdir->pgbase;
211 kunmap_atomic(start, KM_USER0);
214 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
220 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
221 nfs_wait_bit_killable, TASK_KILLABLE);
225 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
232 *timeout = NFS4_POLL_RETRY_MIN;
233 if (*timeout > NFS4_POLL_RETRY_MAX)
234 *timeout = NFS4_POLL_RETRY_MAX;
235 schedule_timeout_killable(*timeout);
236 if (fatal_signal_pending(current))
242 /* This is the error handling routine for processes that are allowed
245 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
247 struct nfs_client *clp = server->nfs_client;
248 struct nfs4_state *state = exception->state;
251 exception->retry = 0;
255 case -NFS4ERR_ADMIN_REVOKED:
256 case -NFS4ERR_BAD_STATEID:
257 case -NFS4ERR_OPENMODE:
260 nfs4_schedule_stateid_recovery(server, state);
261 goto wait_on_recovery;
262 case -NFS4ERR_STALE_STATEID:
263 case -NFS4ERR_STALE_CLIENTID:
264 case -NFS4ERR_EXPIRED:
265 nfs4_schedule_lease_recovery(clp);
266 goto wait_on_recovery;
267 #if defined(CONFIG_NFS_V4_1)
268 case -NFS4ERR_BADSESSION:
269 case -NFS4ERR_BADSLOT:
270 case -NFS4ERR_BAD_HIGH_SLOT:
271 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
272 case -NFS4ERR_DEADSESSION:
273 case -NFS4ERR_SEQ_FALSE_RETRY:
274 case -NFS4ERR_SEQ_MISORDERED:
275 dprintk("%s ERROR: %d Reset session\n", __func__,
277 nfs4_schedule_session_recovery(clp->cl_session);
278 exception->retry = 1;
280 #endif /* defined(CONFIG_NFS_V4_1) */
281 case -NFS4ERR_FILE_OPEN:
282 if (exception->timeout > HZ) {
283 /* We have retried a decent amount, time to
292 ret = nfs4_delay(server->client, &exception->timeout);
295 case -NFS4ERR_OLD_STATEID:
296 exception->retry = 1;
298 /* We failed to handle the error */
299 return nfs4_map_errors(ret);
301 ret = nfs4_wait_clnt_recover(clp);
303 exception->retry = 1;
308 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
310 spin_lock(&clp->cl_lock);
311 if (time_before(clp->cl_last_renewal,timestamp))
312 clp->cl_last_renewal = timestamp;
313 spin_unlock(&clp->cl_lock);
316 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
318 do_renew_lease(server->nfs_client, timestamp);
321 #if defined(CONFIG_NFS_V4_1)
324 * nfs4_free_slot - free a slot and efficiently update slot table.
326 * freeing a slot is trivially done by clearing its respective bit
328 * If the freed slotid equals highest_used_slotid we want to update it
329 * so that the server would be able to size down the slot table if needed,
330 * otherwise we know that the highest_used_slotid is still in use.
331 * When updating highest_used_slotid there may be "holes" in the bitmap
332 * so we need to scan down from highest_used_slotid to 0 looking for the now
333 * highest slotid in use.
334 * If none found, highest_used_slotid is set to -1.
336 * Must be called while holding tbl->slot_tbl_lock
339 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
341 int free_slotid = free_slot - tbl->slots;
342 int slotid = free_slotid;
344 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
345 /* clear used bit in bitmap */
346 __clear_bit(slotid, tbl->used_slots);
348 /* update highest_used_slotid when it is freed */
349 if (slotid == tbl->highest_used_slotid) {
350 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
351 if (slotid < tbl->max_slots)
352 tbl->highest_used_slotid = slotid;
354 tbl->highest_used_slotid = -1;
356 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
357 free_slotid, tbl->highest_used_slotid);
361 * Signal state manager thread if session fore channel is drained
363 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
365 struct rpc_task *task;
367 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
368 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
370 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
374 if (ses->fc_slot_table.highest_used_slotid != -1)
377 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
378 complete(&ses->fc_slot_table.complete);
382 * Signal state manager thread if session back channel is drained
384 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
386 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
387 ses->bc_slot_table.highest_used_slotid != -1)
389 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
390 complete(&ses->bc_slot_table.complete);
393 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
395 struct nfs4_slot_table *tbl;
397 tbl = &res->sr_session->fc_slot_table;
399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
401 dprintk("%s: No slot\n", __func__);
405 spin_lock(&tbl->slot_tbl_lock);
406 nfs4_free_slot(tbl, res->sr_slot);
407 nfs4_check_drain_fc_complete(res->sr_session);
408 spin_unlock(&tbl->slot_tbl_lock);
412 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
414 unsigned long timestamp;
415 struct nfs_client *clp;
418 * sr_status remains 1 if an RPC level error occurred. The server
419 * may or may not have processed the sequence operation..
420 * Proceed as if the server received and processed the sequence
423 if (res->sr_status == 1)
424 res->sr_status = NFS_OK;
426 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
430 /* Check the SEQUENCE operation status */
431 switch (res->sr_status) {
433 /* Update the slot's sequence and clientid lease timer */
434 ++res->sr_slot->seq_nr;
435 timestamp = res->sr_renewal_time;
436 clp = res->sr_session->clp;
437 do_renew_lease(clp, timestamp);
438 /* Check sequence flags */
439 if (res->sr_status_flags != 0)
440 nfs4_schedule_lease_recovery(clp);
443 /* The server detected a resend of the RPC call and
444 * returned NFS4ERR_DELAY as per Section 2.10.6.2
447 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
449 res->sr_slot - res->sr_session->fc_slot_table.slots,
450 res->sr_slot->seq_nr);
453 /* Just update the slot sequence no. */
454 ++res->sr_slot->seq_nr;
457 /* The session may be reset by one of the error handlers. */
458 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
459 nfs41_sequence_free_slot(res);
462 if (!rpc_restart_call(task))
464 rpc_delay(task, NFS4_POLL_RETRY_MAX);
468 static int nfs4_sequence_done(struct rpc_task *task,
469 struct nfs4_sequence_res *res)
471 if (res->sr_session == NULL)
473 return nfs41_sequence_done(task, res);
477 * nfs4_find_slot - efficiently look for a free slot
479 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
480 * If found, we mark the slot as used, update the highest_used_slotid,
481 * and respectively set up the sequence operation args.
482 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
484 * Note: must be called with under the slot_tbl_lock.
487 nfs4_find_slot(struct nfs4_slot_table *tbl)
490 u8 ret_id = NFS4_MAX_SLOT_TABLE;
491 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
493 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
494 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
496 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
497 if (slotid >= tbl->max_slots)
499 __set_bit(slotid, tbl->used_slots);
500 if (slotid > tbl->highest_used_slotid)
501 tbl->highest_used_slotid = slotid;
504 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
505 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
509 static int nfs41_setup_sequence(struct nfs4_session *session,
510 struct nfs4_sequence_args *args,
511 struct nfs4_sequence_res *res,
513 struct rpc_task *task)
515 struct nfs4_slot *slot;
516 struct nfs4_slot_table *tbl;
519 dprintk("--> %s\n", __func__);
520 /* slot already allocated? */
521 if (res->sr_slot != NULL)
524 tbl = &session->fc_slot_table;
526 spin_lock(&tbl->slot_tbl_lock);
527 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
530 * The state manager will wait until the slot table is empty.
531 * Schedule the reset thread
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
535 dprintk("%s Schedule Session Reset\n", __func__);
539 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
540 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 dprintk("%s enforce FIFO order\n", __func__);
547 slotid = nfs4_find_slot(tbl);
548 if (slotid == NFS4_MAX_SLOT_TABLE) {
549 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
550 spin_unlock(&tbl->slot_tbl_lock);
551 dprintk("<-- %s: no free slots\n", __func__);
554 spin_unlock(&tbl->slot_tbl_lock);
556 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
557 slot = tbl->slots + slotid;
558 args->sa_session = session;
559 args->sa_slotid = slotid;
560 args->sa_cache_this = cache_reply;
562 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
564 res->sr_session = session;
566 res->sr_renewal_time = jiffies;
567 res->sr_status_flags = 0;
569 * sr_status is only set in decode_sequence, and so will remain
570 * set to 1 if an rpc level failure occurs.
576 int nfs4_setup_sequence(const struct nfs_server *server,
577 struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res,
580 struct rpc_task *task)
582 struct nfs4_session *session = nfs4_get_session(server);
585 if (session == NULL) {
586 args->sa_session = NULL;
587 res->sr_session = NULL;
591 dprintk("--> %s clp %p session %p sr_slot %td\n",
592 __func__, session->clp, session, res->sr_slot ?
593 res->sr_slot - session->fc_slot_table.slots : -1);
595 ret = nfs41_setup_sequence(session, args, res, cache_reply,
598 dprintk("<-- %s status=%d\n", __func__, ret);
602 struct nfs41_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
609 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
611 struct nfs41_call_sync_data *data = calldata;
613 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
615 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
616 data->seq_res, data->cache_reply, task))
618 rpc_call_start(task);
621 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
623 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
624 nfs41_call_sync_prepare(task, calldata);
627 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
629 struct nfs41_call_sync_data *data = calldata;
631 nfs41_sequence_done(task, data->seq_res);
634 struct rpc_call_ops nfs41_call_sync_ops = {
635 .rpc_call_prepare = nfs41_call_sync_prepare,
636 .rpc_call_done = nfs41_call_sync_done,
639 struct rpc_call_ops nfs41_call_priv_sync_ops = {
640 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
641 .rpc_call_done = nfs41_call_sync_done,
644 static int nfs4_call_sync_sequence(struct nfs_server *server,
645 struct rpc_message *msg,
646 struct nfs4_sequence_args *args,
647 struct nfs4_sequence_res *res,
652 struct rpc_task *task;
653 struct nfs41_call_sync_data data = {
654 .seq_server = server,
657 .cache_reply = cache_reply,
659 struct rpc_task_setup task_setup = {
660 .rpc_client = server->client,
662 .callback_ops = &nfs41_call_sync_ops,
663 .callback_data = &data
668 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
669 task = rpc_run_task(&task_setup);
673 ret = task->tk_status;
679 int _nfs4_call_sync_session(struct nfs_server *server,
680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
685 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
689 static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
694 #endif /* CONFIG_NFS_V4_1 */
696 int _nfs4_call_sync(struct nfs_server *server,
697 struct rpc_message *msg,
698 struct nfs4_sequence_args *args,
699 struct nfs4_sequence_res *res,
702 args->sa_session = res->sr_session = NULL;
703 return rpc_call_sync(server->client, msg, 0);
706 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
707 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
708 &(res)->seq_res, (cache_reply))
710 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
712 struct nfs_inode *nfsi = NFS_I(dir);
714 spin_lock(&dir->i_lock);
715 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
716 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
717 nfs_force_lookup_revalidate(dir);
718 nfsi->change_attr = cinfo->after;
719 spin_unlock(&dir->i_lock);
722 struct nfs4_opendata {
724 struct nfs_openargs o_arg;
725 struct nfs_openres o_res;
726 struct nfs_open_confirmargs c_arg;
727 struct nfs_open_confirmres c_res;
728 struct nfs_fattr f_attr;
729 struct nfs_fattr dir_attr;
732 struct nfs4_state_owner *owner;
733 struct nfs4_state *state;
735 unsigned long timestamp;
736 unsigned int rpc_done : 1;
742 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
744 p->o_res.f_attr = &p->f_attr;
745 p->o_res.dir_attr = &p->dir_attr;
746 p->o_res.seqid = p->o_arg.seqid;
747 p->c_res.seqid = p->c_arg.seqid;
748 p->o_res.server = p->o_arg.server;
749 nfs_fattr_init(&p->f_attr);
750 nfs_fattr_init(&p->dir_attr);
753 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
754 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
755 const struct iattr *attrs,
758 struct dentry *parent = dget_parent(path->dentry);
759 struct inode *dir = parent->d_inode;
760 struct nfs_server *server = NFS_SERVER(dir);
761 struct nfs4_opendata *p;
763 p = kzalloc(sizeof(*p), gfp_mask);
766 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
767 if (p->o_arg.seqid == NULL)
773 atomic_inc(&sp->so_count);
774 p->o_arg.fh = NFS_FH(dir);
775 p->o_arg.open_flags = flags;
776 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
777 p->o_arg.clientid = server->nfs_client->cl_clientid;
778 p->o_arg.id = sp->so_owner_id.id;
779 p->o_arg.name = &p->path.dentry->d_name;
780 p->o_arg.server = server;
781 p->o_arg.bitmask = server->attr_bitmask;
782 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
783 if (flags & O_CREAT) {
786 p->o_arg.u.attrs = &p->attrs;
787 memcpy(&p->attrs, attrs, sizeof(p->attrs));
788 s = (u32 *) p->o_arg.u.verifier.data;
792 p->c_arg.fh = &p->o_res.fh;
793 p->c_arg.stateid = &p->o_res.stateid;
794 p->c_arg.seqid = p->o_arg.seqid;
795 nfs4_init_opendata_res(p);
805 static void nfs4_opendata_free(struct kref *kref)
807 struct nfs4_opendata *p = container_of(kref,
808 struct nfs4_opendata, kref);
810 nfs_free_seqid(p->o_arg.seqid);
811 if (p->state != NULL)
812 nfs4_put_open_state(p->state);
813 nfs4_put_state_owner(p->owner);
819 static void nfs4_opendata_put(struct nfs4_opendata *p)
822 kref_put(&p->kref, nfs4_opendata_free);
825 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
829 ret = rpc_wait_for_completion_task(task);
833 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
837 if (open_mode & O_EXCL)
839 switch (mode & (FMODE_READ|FMODE_WRITE)) {
841 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
842 && state->n_rdonly != 0;
845 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
846 && state->n_wronly != 0;
848 case FMODE_READ|FMODE_WRITE:
849 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
850 && state->n_rdwr != 0;
856 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
858 if ((delegation->type & fmode) != fmode)
860 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
862 nfs_mark_delegation_referenced(delegation);
866 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
875 case FMODE_READ|FMODE_WRITE:
878 nfs4_state_set_mode_locked(state, state->state | fmode);
881 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
883 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
884 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
885 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
888 set_bit(NFS_O_RDONLY_STATE, &state->flags);
891 set_bit(NFS_O_WRONLY_STATE, &state->flags);
893 case FMODE_READ|FMODE_WRITE:
894 set_bit(NFS_O_RDWR_STATE, &state->flags);
898 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
900 write_seqlock(&state->seqlock);
901 nfs_set_open_stateid_locked(state, stateid, fmode);
902 write_sequnlock(&state->seqlock);
905 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
908 * Protect the call to nfs4_state_set_mode_locked and
909 * serialise the stateid update
911 write_seqlock(&state->seqlock);
912 if (deleg_stateid != NULL) {
913 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
914 set_bit(NFS_DELEGATED_STATE, &state->flags);
916 if (open_stateid != NULL)
917 nfs_set_open_stateid_locked(state, open_stateid, fmode);
918 write_sequnlock(&state->seqlock);
919 spin_lock(&state->owner->so_lock);
920 update_open_stateflags(state, fmode);
921 spin_unlock(&state->owner->so_lock);
924 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
926 struct nfs_inode *nfsi = NFS_I(state->inode);
927 struct nfs_delegation *deleg_cur;
930 fmode &= (FMODE_READ|FMODE_WRITE);
933 deleg_cur = rcu_dereference(nfsi->delegation);
934 if (deleg_cur == NULL)
937 spin_lock(&deleg_cur->lock);
938 if (nfsi->delegation != deleg_cur ||
939 (deleg_cur->type & fmode) != fmode)
940 goto no_delegation_unlock;
942 if (delegation == NULL)
943 delegation = &deleg_cur->stateid;
944 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
945 goto no_delegation_unlock;
947 nfs_mark_delegation_referenced(deleg_cur);
948 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
950 no_delegation_unlock:
951 spin_unlock(&deleg_cur->lock);
955 if (!ret && open_stateid != NULL) {
956 __update_open_stateid(state, open_stateid, NULL, fmode);
964 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
966 struct nfs_delegation *delegation;
969 delegation = rcu_dereference(NFS_I(inode)->delegation);
970 if (delegation == NULL || (delegation->type & fmode) == fmode) {
975 nfs_inode_return_delegation(inode);
978 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
980 struct nfs4_state *state = opendata->state;
981 struct nfs_inode *nfsi = NFS_I(state->inode);
982 struct nfs_delegation *delegation;
983 int open_mode = opendata->o_arg.open_flags & O_EXCL;
984 fmode_t fmode = opendata->o_arg.fmode;
985 nfs4_stateid stateid;
989 if (can_open_cached(state, fmode, open_mode)) {
990 spin_lock(&state->owner->so_lock);
991 if (can_open_cached(state, fmode, open_mode)) {
992 update_open_stateflags(state, fmode);
993 spin_unlock(&state->owner->so_lock);
994 goto out_return_state;
996 spin_unlock(&state->owner->so_lock);
999 delegation = rcu_dereference(nfsi->delegation);
1000 if (delegation == NULL ||
1001 !can_open_delegated(delegation, fmode)) {
1005 /* Save the delegation */
1006 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1008 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1013 /* Try to update the stateid using the delegation */
1014 if (update_open_stateid(state, NULL, &stateid, fmode))
1015 goto out_return_state;
1018 return ERR_PTR(ret);
1020 atomic_inc(&state->count);
1024 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1026 struct inode *inode;
1027 struct nfs4_state *state = NULL;
1028 struct nfs_delegation *delegation;
1031 if (!data->rpc_done) {
1032 state = nfs4_try_open_cached(data);
1037 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1039 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1040 ret = PTR_ERR(inode);
1044 state = nfs4_get_open_state(inode, data->owner);
1047 if (data->o_res.delegation_type != 0) {
1048 int delegation_flags = 0;
1051 delegation = rcu_dereference(NFS_I(inode)->delegation);
1053 delegation_flags = delegation->flags;
1055 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1056 nfs_inode_set_delegation(state->inode,
1057 data->owner->so_cred,
1060 nfs_inode_reclaim_delegation(state->inode,
1061 data->owner->so_cred,
1065 update_open_stateid(state, &data->o_res.stateid, NULL,
1073 return ERR_PTR(ret);
1076 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_open_context *ctx;
1081 spin_lock(&state->inode->i_lock);
1082 list_for_each_entry(ctx, &nfsi->open_files, list) {
1083 if (ctx->state != state)
1085 get_nfs_open_context(ctx);
1086 spin_unlock(&state->inode->i_lock);
1089 spin_unlock(&state->inode->i_lock);
1090 return ERR_PTR(-ENOENT);
1093 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1095 struct nfs4_opendata *opendata;
1097 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1098 if (opendata == NULL)
1099 return ERR_PTR(-ENOMEM);
1100 opendata->state = state;
1101 atomic_inc(&state->count);
1105 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1107 struct nfs4_state *newstate;
1110 opendata->o_arg.open_flags = 0;
1111 opendata->o_arg.fmode = fmode;
1112 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1113 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1114 nfs4_init_opendata_res(opendata);
1115 ret = _nfs4_recover_proc_open(opendata);
1118 newstate = nfs4_opendata_to_nfs4_state(opendata);
1119 if (IS_ERR(newstate))
1120 return PTR_ERR(newstate);
1121 nfs4_close_state(&opendata->path, newstate, fmode);
1126 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1128 struct nfs4_state *newstate;
1131 /* memory barrier prior to reading state->n_* */
1132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1134 if (state->n_rdwr != 0) {
1135 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1136 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1139 if (newstate != state)
1142 if (state->n_wronly != 0) {
1143 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1144 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1147 if (newstate != state)
1150 if (state->n_rdonly != 0) {
1151 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1152 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1155 if (newstate != state)
1159 * We may have performed cached opens for all three recoveries.
1160 * Check if we need to update the current stateid.
1162 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1163 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1164 write_seqlock(&state->seqlock);
1165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1166 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1167 write_sequnlock(&state->seqlock);
1174 * reclaim state on the server after a reboot.
1176 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1178 struct nfs_delegation *delegation;
1179 struct nfs4_opendata *opendata;
1180 fmode_t delegation_type = 0;
1183 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1184 if (IS_ERR(opendata))
1185 return PTR_ERR(opendata);
1186 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1187 opendata->o_arg.fh = NFS_FH(state->inode);
1189 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1190 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1191 delegation_type = delegation->type;
1193 opendata->o_arg.u.delegation_type = delegation_type;
1194 status = nfs4_open_recover(opendata, state);
1195 nfs4_opendata_put(opendata);
1199 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1201 struct nfs_server *server = NFS_SERVER(state->inode);
1202 struct nfs4_exception exception = { };
1205 err = _nfs4_do_open_reclaim(ctx, state);
1206 if (err != -NFS4ERR_DELAY)
1208 nfs4_handle_exception(server, err, &exception);
1209 } while (exception.retry);
1213 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1215 struct nfs_open_context *ctx;
1218 ctx = nfs4_state_find_open_context(state);
1220 return PTR_ERR(ctx);
1221 ret = nfs4_do_open_reclaim(ctx, state);
1222 put_nfs_open_context(ctx);
1226 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1228 struct nfs4_opendata *opendata;
1231 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1232 if (IS_ERR(opendata))
1233 return PTR_ERR(opendata);
1234 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1235 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1236 sizeof(opendata->o_arg.u.delegation.data));
1237 ret = nfs4_open_recover(opendata, state);
1238 nfs4_opendata_put(opendata);
1242 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1244 struct nfs4_exception exception = { };
1245 struct nfs_server *server = NFS_SERVER(state->inode);
1248 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1254 case -NFS4ERR_BADSESSION:
1255 case -NFS4ERR_BADSLOT:
1256 case -NFS4ERR_BAD_HIGH_SLOT:
1257 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1258 case -NFS4ERR_DEADSESSION:
1259 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1261 case -NFS4ERR_STALE_CLIENTID:
1262 case -NFS4ERR_STALE_STATEID:
1263 case -NFS4ERR_EXPIRED:
1264 /* Don't recall a delegation if it was lost */
1265 nfs4_schedule_lease_recovery(server->nfs_client);
1269 * The show must go on: exit, but mark the
1270 * stateid as needing recovery.
1272 case -NFS4ERR_ADMIN_REVOKED:
1273 case -NFS4ERR_BAD_STATEID:
1274 nfs4_schedule_stateid_recovery(server, state);
1277 * User RPCSEC_GSS context has expired.
1278 * We cannot recover this stateid now, so
1279 * skip it and allow recovery thread to
1286 err = nfs4_handle_exception(server, err, &exception);
1287 } while (exception.retry);
1292 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1294 struct nfs4_opendata *data = calldata;
1296 data->rpc_status = task->tk_status;
1297 if (data->rpc_status == 0) {
1298 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1299 sizeof(data->o_res.stateid.data));
1300 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1301 renew_lease(data->o_res.server, data->timestamp);
1306 static void nfs4_open_confirm_release(void *calldata)
1308 struct nfs4_opendata *data = calldata;
1309 struct nfs4_state *state = NULL;
1311 /* If this request hasn't been cancelled, do nothing */
1312 if (data->cancelled == 0)
1314 /* In case of error, no cleanup! */
1315 if (!data->rpc_done)
1317 state = nfs4_opendata_to_nfs4_state(data);
1319 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1321 nfs4_opendata_put(data);
1324 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1325 .rpc_call_done = nfs4_open_confirm_done,
1326 .rpc_release = nfs4_open_confirm_release,
1330 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1332 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1334 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1335 struct rpc_task *task;
1336 struct rpc_message msg = {
1337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1338 .rpc_argp = &data->c_arg,
1339 .rpc_resp = &data->c_res,
1340 .rpc_cred = data->owner->so_cred,
1342 struct rpc_task_setup task_setup_data = {
1343 .rpc_client = server->client,
1344 .rpc_message = &msg,
1345 .callback_ops = &nfs4_open_confirm_ops,
1346 .callback_data = data,
1347 .workqueue = nfsiod_workqueue,
1348 .flags = RPC_TASK_ASYNC,
1352 kref_get(&data->kref);
1354 data->rpc_status = 0;
1355 data->timestamp = jiffies;
1356 task = rpc_run_task(&task_setup_data);
1358 return PTR_ERR(task);
1359 status = nfs4_wait_for_completion_rpc_task(task);
1361 data->cancelled = 1;
1364 status = data->rpc_status;
1369 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1371 struct nfs4_opendata *data = calldata;
1372 struct nfs4_state_owner *sp = data->owner;
1374 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1377 * Check if we still need to send an OPEN call, or if we can use
1378 * a delegation instead.
1380 if (data->state != NULL) {
1381 struct nfs_delegation *delegation;
1383 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1386 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1387 if (delegation != NULL &&
1388 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1394 /* Update sequence id. */
1395 data->o_arg.id = sp->so_owner_id.id;
1396 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1397 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1398 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1399 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1401 data->timestamp = jiffies;
1402 if (nfs4_setup_sequence(data->o_arg.server,
1403 &data->o_arg.seq_args,
1404 &data->o_res.seq_res, 1, task))
1406 rpc_call_start(task);
1409 task->tk_action = NULL;
1413 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1415 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1416 nfs4_open_prepare(task, calldata);
1419 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1421 struct nfs4_opendata *data = calldata;
1423 data->rpc_status = task->tk_status;
1425 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1428 if (task->tk_status == 0) {
1429 switch (data->o_res.f_attr->mode & S_IFMT) {
1433 data->rpc_status = -ELOOP;
1436 data->rpc_status = -EISDIR;
1439 data->rpc_status = -ENOTDIR;
1441 renew_lease(data->o_res.server, data->timestamp);
1442 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1443 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1448 static void nfs4_open_release(void *calldata)
1450 struct nfs4_opendata *data = calldata;
1451 struct nfs4_state *state = NULL;
1453 /* If this request hasn't been cancelled, do nothing */
1454 if (data->cancelled == 0)
1456 /* In case of error, no cleanup! */
1457 if (data->rpc_status != 0 || !data->rpc_done)
1459 /* In case we need an open_confirm, no cleanup! */
1460 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1462 state = nfs4_opendata_to_nfs4_state(data);
1464 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1466 nfs4_opendata_put(data);
1469 static const struct rpc_call_ops nfs4_open_ops = {
1470 .rpc_call_prepare = nfs4_open_prepare,
1471 .rpc_call_done = nfs4_open_done,
1472 .rpc_release = nfs4_open_release,
1475 static const struct rpc_call_ops nfs4_recover_open_ops = {
1476 .rpc_call_prepare = nfs4_recover_open_prepare,
1477 .rpc_call_done = nfs4_open_done,
1478 .rpc_release = nfs4_open_release,
1481 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1483 struct inode *dir = data->dir->d_inode;
1484 struct nfs_server *server = NFS_SERVER(dir);
1485 struct nfs_openargs *o_arg = &data->o_arg;
1486 struct nfs_openres *o_res = &data->o_res;
1487 struct rpc_task *task;
1488 struct rpc_message msg = {
1489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1492 .rpc_cred = data->owner->so_cred,
1494 struct rpc_task_setup task_setup_data = {
1495 .rpc_client = server->client,
1496 .rpc_message = &msg,
1497 .callback_ops = &nfs4_open_ops,
1498 .callback_data = data,
1499 .workqueue = nfsiod_workqueue,
1500 .flags = RPC_TASK_ASYNC,
1504 kref_get(&data->kref);
1506 data->rpc_status = 0;
1507 data->cancelled = 0;
1509 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1510 task = rpc_run_task(&task_setup_data);
1512 return PTR_ERR(task);
1513 status = nfs4_wait_for_completion_rpc_task(task);
1515 data->cancelled = 1;
1518 status = data->rpc_status;
1524 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1526 struct inode *dir = data->dir->d_inode;
1527 struct nfs_openres *o_res = &data->o_res;
1530 status = nfs4_run_open_task(data, 1);
1531 if (status != 0 || !data->rpc_done)
1534 nfs_refresh_inode(dir, o_res->dir_attr);
1536 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1537 status = _nfs4_proc_open_confirm(data);
1546 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1548 static int _nfs4_proc_open(struct nfs4_opendata *data)
1550 struct inode *dir = data->dir->d_inode;
1551 struct nfs_server *server = NFS_SERVER(dir);
1552 struct nfs_openargs *o_arg = &data->o_arg;
1553 struct nfs_openres *o_res = &data->o_res;
1556 status = nfs4_run_open_task(data, 0);
1557 if (status != 0 || !data->rpc_done)
1560 if (o_arg->open_flags & O_CREAT) {
1561 update_changeattr(dir, &o_res->cinfo);
1562 nfs_post_op_update_inode(dir, o_res->dir_attr);
1564 nfs_refresh_inode(dir, o_res->dir_attr);
1565 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1566 server->caps &= ~NFS_CAP_POSIX_LOCK;
1567 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1568 status = _nfs4_proc_open_confirm(data);
1572 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1573 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1577 static int nfs4_recover_expired_lease(struct nfs_server *server)
1579 struct nfs_client *clp = server->nfs_client;
1583 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1584 ret = nfs4_wait_clnt_recover(clp);
1587 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1588 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1590 nfs4_schedule_state_manager(clp);
1598 * reclaim state on the server after a network partition.
1599 * Assumes caller holds the appropriate lock
1601 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1603 struct nfs4_opendata *opendata;
1606 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1607 if (IS_ERR(opendata))
1608 return PTR_ERR(opendata);
1609 ret = nfs4_open_recover(opendata, state);
1611 d_drop(ctx->path.dentry);
1612 nfs4_opendata_put(opendata);
1616 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1618 struct nfs_server *server = NFS_SERVER(state->inode);
1619 struct nfs4_exception exception = { };
1623 err = _nfs4_open_expired(ctx, state);
1627 case -NFS4ERR_GRACE:
1628 case -NFS4ERR_DELAY:
1629 nfs4_handle_exception(server, err, &exception);
1632 } while (exception.retry);
1637 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1639 struct nfs_open_context *ctx;
1642 ctx = nfs4_state_find_open_context(state);
1644 return PTR_ERR(ctx);
1645 ret = nfs4_do_open_expired(ctx, state);
1646 put_nfs_open_context(ctx);
1651 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1652 * fields corresponding to attributes that were used to store the verifier.
1653 * Make sure we clobber those fields in the later setattr call
1655 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1657 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1658 !(sattr->ia_valid & ATTR_ATIME_SET))
1659 sattr->ia_valid |= ATTR_ATIME;
1661 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1662 !(sattr->ia_valid & ATTR_MTIME_SET))
1663 sattr->ia_valid |= ATTR_MTIME;
1667 * Returns a referenced nfs4_state
1669 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)
1671 struct nfs4_state_owner *sp;
1672 struct nfs4_state *state = NULL;
1673 struct nfs_server *server = NFS_SERVER(dir);
1674 struct nfs4_opendata *opendata;
1677 /* Protect against reboot recovery conflicts */
1679 if (!(sp = nfs4_get_state_owner(server, cred))) {
1680 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1683 status = nfs4_recover_expired_lease(server);
1685 goto err_put_state_owner;
1686 if (path->dentry->d_inode != NULL)
1687 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1689 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1690 if (opendata == NULL)
1691 goto err_put_state_owner;
1693 if (path->dentry->d_inode != NULL)
1694 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1696 status = _nfs4_proc_open(opendata);
1698 goto err_opendata_put;
1700 state = nfs4_opendata_to_nfs4_state(opendata);
1701 status = PTR_ERR(state);
1703 goto err_opendata_put;
1704 if (server->caps & NFS_CAP_POSIX_LOCK)
1705 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1707 if (opendata->o_arg.open_flags & O_EXCL) {
1708 nfs4_exclusive_attrset(opendata, sattr);
1710 nfs_fattr_init(opendata->o_res.f_attr);
1711 status = nfs4_do_setattr(state->inode, cred,
1712 opendata->o_res.f_attr, sattr,
1715 nfs_setattr_update_inode(state->inode, sattr);
1716 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1718 nfs4_opendata_put(opendata);
1719 nfs4_put_state_owner(sp);
1723 nfs4_opendata_put(opendata);
1724 err_put_state_owner:
1725 nfs4_put_state_owner(sp);
1732 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)
1734 struct nfs4_exception exception = { };
1735 struct nfs4_state *res;
1739 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1742 /* NOTE: BAD_SEQID means the server and client disagree about the
1743 * book-keeping w.r.t. state-changing operations
1744 * (OPEN/CLOSE/LOCK/LOCKU...)
1745 * It is actually a sign of a bug on the client or on the server.
1747 * If we receive a BAD_SEQID error in the particular case of
1748 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1749 * have unhashed the old state_owner for us, and that we can
1750 * therefore safely retry using a new one. We should still warn
1751 * the user though...
1753 if (status == -NFS4ERR_BAD_SEQID) {
1754 printk(KERN_WARNING "NFS: v4 server %s "
1755 " returned a bad sequence-id error!\n",
1756 NFS_SERVER(dir)->nfs_client->cl_hostname);
1757 exception.retry = 1;
1761 * BAD_STATEID on OPEN means that the server cancelled our
1762 * state before it received the OPEN_CONFIRM.
1763 * Recover by retrying the request as per the discussion
1764 * on Page 181 of RFC3530.
1766 if (status == -NFS4ERR_BAD_STATEID) {
1767 exception.retry = 1;
1770 if (status == -EAGAIN) {
1771 /* We must have found a delegation */
1772 exception.retry = 1;
1775 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1776 status, &exception));
1777 } while (exception.retry);
1781 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1782 struct nfs_fattr *fattr, struct iattr *sattr,
1783 struct nfs4_state *state)
1785 struct nfs_server *server = NFS_SERVER(inode);
1786 struct nfs_setattrargs arg = {
1787 .fh = NFS_FH(inode),
1790 .bitmask = server->attr_bitmask,
1792 struct nfs_setattrres res = {
1796 struct rpc_message msg = {
1797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1802 unsigned long timestamp = jiffies;
1805 nfs_fattr_init(fattr);
1807 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1808 /* Use that stateid */
1809 } else if (state != NULL) {
1810 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1812 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1814 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1815 if (status == 0 && state != NULL)
1816 renew_lease(server, timestamp);
1820 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1821 struct nfs_fattr *fattr, struct iattr *sattr,
1822 struct nfs4_state *state)
1824 struct nfs_server *server = NFS_SERVER(inode);
1825 struct nfs4_exception exception = { };
1828 err = nfs4_handle_exception(server,
1829 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1831 } while (exception.retry);
1835 struct nfs4_closedata {
1837 struct inode *inode;
1838 struct nfs4_state *state;
1839 struct nfs_closeargs arg;
1840 struct nfs_closeres res;
1841 struct nfs_fattr fattr;
1842 unsigned long timestamp;
1847 static void nfs4_free_closedata(void *data)
1849 struct nfs4_closedata *calldata = data;
1850 struct nfs4_state_owner *sp = calldata->state->owner;
1853 pnfs_roc_release(calldata->state->inode);
1854 nfs4_put_open_state(calldata->state);
1855 nfs_free_seqid(calldata->arg.seqid);
1856 nfs4_put_state_owner(sp);
1857 path_put(&calldata->path);
1861 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1864 spin_lock(&state->owner->so_lock);
1865 if (!(fmode & FMODE_READ))
1866 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1867 if (!(fmode & FMODE_WRITE))
1868 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1869 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1870 spin_unlock(&state->owner->so_lock);
1873 static void nfs4_close_done(struct rpc_task *task, void *data)
1875 struct nfs4_closedata *calldata = data;
1876 struct nfs4_state *state = calldata->state;
1877 struct nfs_server *server = NFS_SERVER(calldata->inode);
1879 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1881 /* hmm. we are done with the inode, and in the process of freeing
1882 * the state_owner. we keep this around to process errors
1884 switch (task->tk_status) {
1887 pnfs_roc_set_barrier(state->inode,
1888 calldata->roc_barrier);
1889 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1890 renew_lease(server, calldata->timestamp);
1891 nfs4_close_clear_stateid_flags(state,
1892 calldata->arg.fmode);
1894 case -NFS4ERR_STALE_STATEID:
1895 case -NFS4ERR_OLD_STATEID:
1896 case -NFS4ERR_BAD_STATEID:
1897 case -NFS4ERR_EXPIRED:
1898 if (calldata->arg.fmode == 0)
1901 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1902 rpc_restart_call_prepare(task);
1904 nfs_release_seqid(calldata->arg.seqid);
1905 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1908 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1910 struct nfs4_closedata *calldata = data;
1911 struct nfs4_state *state = calldata->state;
1914 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1917 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1918 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1919 spin_lock(&state->owner->so_lock);
1920 /* Calculate the change in open mode */
1921 if (state->n_rdwr == 0) {
1922 if (state->n_rdonly == 0) {
1923 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1924 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1925 calldata->arg.fmode &= ~FMODE_READ;
1927 if (state->n_wronly == 0) {
1928 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1929 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1930 calldata->arg.fmode &= ~FMODE_WRITE;
1933 spin_unlock(&state->owner->so_lock);
1936 /* Note: exit _without_ calling nfs4_close_done */
1937 task->tk_action = NULL;
1941 if (calldata->arg.fmode == 0) {
1942 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1943 if (calldata->roc &&
1944 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1945 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1951 nfs_fattr_init(calldata->res.fattr);
1952 calldata->timestamp = jiffies;
1953 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1954 &calldata->arg.seq_args, &calldata->res.seq_res,
1957 rpc_call_start(task);
1960 static const struct rpc_call_ops nfs4_close_ops = {
1961 .rpc_call_prepare = nfs4_close_prepare,
1962 .rpc_call_done = nfs4_close_done,
1963 .rpc_release = nfs4_free_closedata,
1967 * It is possible for data to be read/written from a mem-mapped file
1968 * after the sys_close call (which hits the vfs layer as a flush).
1969 * This means that we can't safely call nfsv4 close on a file until
1970 * the inode is cleared. This in turn means that we are not good
1971 * NFSv4 citizens - we do not indicate to the server to update the file's
1972 * share state even when we are done with one of the three share
1973 * stateid's in the inode.
1975 * NOTE: Caller must be holding the sp->so_owner semaphore!
1977 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1979 struct nfs_server *server = NFS_SERVER(state->inode);
1980 struct nfs4_closedata *calldata;
1981 struct nfs4_state_owner *sp = state->owner;
1982 struct rpc_task *task;
1983 struct rpc_message msg = {
1984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1985 .rpc_cred = state->owner->so_cred,
1987 struct rpc_task_setup task_setup_data = {
1988 .rpc_client = server->client,
1989 .rpc_message = &msg,
1990 .callback_ops = &nfs4_close_ops,
1991 .workqueue = nfsiod_workqueue,
1992 .flags = RPC_TASK_ASYNC,
1994 int status = -ENOMEM;
1996 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1997 if (calldata == NULL)
1999 calldata->inode = state->inode;
2000 calldata->state = state;
2001 calldata->arg.fh = NFS_FH(state->inode);
2002 calldata->arg.stateid = &state->open_stateid;
2003 /* Serialization for the sequence id */
2004 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2005 if (calldata->arg.seqid == NULL)
2006 goto out_free_calldata;
2007 calldata->arg.fmode = 0;
2008 calldata->arg.bitmask = server->cache_consistency_bitmask;
2009 calldata->res.fattr = &calldata->fattr;
2010 calldata->res.seqid = calldata->arg.seqid;
2011 calldata->res.server = server;
2012 calldata->roc = roc;
2014 calldata->path = *path;
2016 msg.rpc_argp = &calldata->arg;
2017 msg.rpc_resp = &calldata->res;
2018 task_setup_data.callback_data = calldata;
2019 task = rpc_run_task(&task_setup_data);
2021 return PTR_ERR(task);
2024 status = rpc_wait_for_completion_task(task);
2031 pnfs_roc_release(state->inode);
2032 nfs4_put_open_state(state);
2033 nfs4_put_state_owner(sp);
2037 static struct inode *
2038 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2040 struct nfs4_state *state;
2042 /* Protect against concurrent sillydeletes */
2043 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2045 return ERR_CAST(state);
2047 return igrab(state->inode);
2050 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2052 if (ctx->state == NULL)
2055 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2057 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2060 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2062 struct nfs4_server_caps_arg args = {
2065 struct nfs4_server_caps_res res = {};
2066 struct rpc_message msg = {
2067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2073 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2075 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2076 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2077 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2078 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2079 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2080 NFS_CAP_CTIME|NFS_CAP_MTIME);
2081 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2082 server->caps |= NFS_CAP_ACLS;
2083 if (res.has_links != 0)
2084 server->caps |= NFS_CAP_HARDLINKS;
2085 if (res.has_symlinks != 0)
2086 server->caps |= NFS_CAP_SYMLINKS;
2087 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2088 server->caps |= NFS_CAP_FILEID;
2089 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2090 server->caps |= NFS_CAP_MODE;
2091 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2092 server->caps |= NFS_CAP_NLINK;
2093 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2094 server->caps |= NFS_CAP_OWNER;
2095 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2096 server->caps |= NFS_CAP_OWNER_GROUP;
2097 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2098 server->caps |= NFS_CAP_ATIME;
2099 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2100 server->caps |= NFS_CAP_CTIME;
2101 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2102 server->caps |= NFS_CAP_MTIME;
2104 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2105 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2106 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2107 server->acl_bitmask = res.acl_bitmask;
2113 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2115 struct nfs4_exception exception = { };
2118 err = nfs4_handle_exception(server,
2119 _nfs4_server_capabilities(server, fhandle),
2121 } while (exception.retry);
2125 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2126 struct nfs_fsinfo *info)
2128 struct nfs4_lookup_root_arg args = {
2129 .bitmask = nfs4_fattr_bitmap,
2131 struct nfs4_lookup_res res = {
2133 .fattr = info->fattr,
2136 struct rpc_message msg = {
2137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2142 nfs_fattr_init(info->fattr);
2143 return nfs4_call_sync(server, &msg, &args, &res, 0);
2146 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2147 struct nfs_fsinfo *info)
2149 struct nfs4_exception exception = { };
2152 err = nfs4_handle_exception(server,
2153 _nfs4_lookup_root(server, fhandle, info),
2155 } while (exception.retry);
2160 * get the file handle for the "/" directory on the server
2162 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2163 struct nfs_fsinfo *info)
2167 status = nfs4_lookup_root(server, fhandle, info);
2169 status = nfs4_server_capabilities(server, fhandle);
2171 status = nfs4_do_fsinfo(server, fhandle, info);
2172 return nfs4_map_errors(status);
2176 * Get locations and (maybe) other attributes of a referral.
2177 * Note that we'll actually follow the referral later when
2178 * we detect fsid mismatch in inode revalidation
2180 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2182 int status = -ENOMEM;
2183 struct page *page = NULL;
2184 struct nfs4_fs_locations *locations = NULL;
2186 page = alloc_page(GFP_KERNEL);
2189 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2190 if (locations == NULL)
2193 status = nfs4_proc_fs_locations(dir, name, locations, page);
2196 /* Make sure server returned a different fsid for the referral */
2197 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2198 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2203 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2204 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2206 fattr->mode = S_IFDIR;
2207 memset(fhandle, 0, sizeof(struct nfs_fh));
2215 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2217 struct nfs4_getattr_arg args = {
2219 .bitmask = server->attr_bitmask,
2221 struct nfs4_getattr_res res = {
2225 struct rpc_message msg = {
2226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2231 nfs_fattr_init(fattr);
2232 return nfs4_call_sync(server, &msg, &args, &res, 0);
2235 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2237 struct nfs4_exception exception = { };
2240 err = nfs4_handle_exception(server,
2241 _nfs4_proc_getattr(server, fhandle, fattr),
2243 } while (exception.retry);
2248 * The file is not closed if it is opened due to the a request to change
2249 * the size of the file. The open call will not be needed once the
2250 * VFS layer lookup-intents are implemented.
2252 * Close is called when the inode is destroyed.
2253 * If we haven't opened the file for O_WRONLY, we
2254 * need to in the size_change case to obtain a stateid.
2257 * Because OPEN is always done by name in nfsv4, it is
2258 * possible that we opened a different file by the same
2259 * name. We can recognize this race condition, but we
2260 * can't do anything about it besides returning an error.
2262 * This will be fixed with VFS changes (lookup-intent).
2265 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2266 struct iattr *sattr)
2268 struct inode *inode = dentry->d_inode;
2269 struct rpc_cred *cred = NULL;
2270 struct nfs4_state *state = NULL;
2273 nfs_fattr_init(fattr);
2275 /* Search for an existing open(O_WRITE) file */
2276 if (sattr->ia_valid & ATTR_FILE) {
2277 struct nfs_open_context *ctx;
2279 ctx = nfs_file_open_context(sattr->ia_file);
2286 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2288 nfs_setattr_update_inode(inode, sattr);
2292 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2293 const struct qstr *name, struct nfs_fh *fhandle,
2294 struct nfs_fattr *fattr)
2297 struct nfs4_lookup_arg args = {
2298 .bitmask = server->attr_bitmask,
2302 struct nfs4_lookup_res res = {
2307 struct rpc_message msg = {
2308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2313 nfs_fattr_init(fattr);
2315 dprintk("NFS call lookupfh %s\n", name->name);
2316 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2317 dprintk("NFS reply lookupfh: %d\n", status);
2321 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2322 struct qstr *name, struct nfs_fh *fhandle,
2323 struct nfs_fattr *fattr)
2325 struct nfs4_exception exception = { };
2328 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2330 if (err == -NFS4ERR_MOVED) {
2334 err = nfs4_handle_exception(server, err, &exception);
2335 } while (exception.retry);
2339 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2340 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2344 dprintk("NFS call lookup %s\n", name->name);
2345 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2346 if (status == -NFS4ERR_MOVED)
2347 status = nfs4_get_referral(dir, name, fattr, fhandle);
2348 dprintk("NFS reply lookup: %d\n", status);
2352 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2354 struct nfs4_exception exception = { };
2357 err = nfs4_handle_exception(NFS_SERVER(dir),
2358 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2360 } while (exception.retry);
2364 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2366 struct nfs_server *server = NFS_SERVER(inode);
2367 struct nfs4_accessargs args = {
2368 .fh = NFS_FH(inode),
2369 .bitmask = server->attr_bitmask,
2371 struct nfs4_accessres res = {
2374 struct rpc_message msg = {
2375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2378 .rpc_cred = entry->cred,
2380 int mode = entry->mask;
2384 * Determine which access bits we want to ask for...
2386 if (mode & MAY_READ)
2387 args.access |= NFS4_ACCESS_READ;
2388 if (S_ISDIR(inode->i_mode)) {
2389 if (mode & MAY_WRITE)
2390 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2391 if (mode & MAY_EXEC)
2392 args.access |= NFS4_ACCESS_LOOKUP;
2394 if (mode & MAY_WRITE)
2395 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2396 if (mode & MAY_EXEC)
2397 args.access |= NFS4_ACCESS_EXECUTE;
2400 res.fattr = nfs_alloc_fattr();
2401 if (res.fattr == NULL)
2404 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2407 if (res.access & NFS4_ACCESS_READ)
2408 entry->mask |= MAY_READ;
2409 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2410 entry->mask |= MAY_WRITE;
2411 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2412 entry->mask |= MAY_EXEC;
2413 nfs_refresh_inode(inode, res.fattr);
2415 nfs_free_fattr(res.fattr);
2419 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2421 struct nfs4_exception exception = { };
2424 err = nfs4_handle_exception(NFS_SERVER(inode),
2425 _nfs4_proc_access(inode, entry),
2427 } while (exception.retry);
2432 * TODO: For the time being, we don't try to get any attributes
2433 * along with any of the zero-copy operations READ, READDIR,
2436 * In the case of the first three, we want to put the GETATTR
2437 * after the read-type operation -- this is because it is hard
2438 * to predict the length of a GETATTR response in v4, and thus
2439 * align the READ data correctly. This means that the GETATTR
2440 * may end up partially falling into the page cache, and we should
2441 * shift it into the 'tail' of the xdr_buf before processing.
2442 * To do this efficiently, we need to know the total length
2443 * of data received, which doesn't seem to be available outside
2446 * In the case of WRITE, we also want to put the GETATTR after
2447 * the operation -- in this case because we want to make sure
2448 * we get the post-operation mtime and size. This means that
2449 * we can't use xdr_encode_pages() as written: we need a variant
2450 * of it which would leave room in the 'tail' iovec.
2452 * Both of these changes to the XDR layer would in fact be quite
2453 * minor, but I decided to leave them for a subsequent patch.
2455 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2456 unsigned int pgbase, unsigned int pglen)
2458 struct nfs4_readlink args = {
2459 .fh = NFS_FH(inode),
2464 struct nfs4_readlink_res res;
2465 struct rpc_message msg = {
2466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2471 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2474 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2475 unsigned int pgbase, unsigned int pglen)
2477 struct nfs4_exception exception = { };
2480 err = nfs4_handle_exception(NFS_SERVER(inode),
2481 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2483 } while (exception.retry);
2489 * We will need to arrange for the VFS layer to provide an atomic open.
2490 * Until then, this create/open method is prone to inefficiency and race
2491 * conditions due to the lookup, create, and open VFS calls from sys_open()
2492 * placed on the wire.
2494 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2495 * The file will be opened again in the subsequent VFS open call
2496 * (nfs4_proc_file_open).
2498 * The open for read will just hang around to be used by any process that
2499 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2503 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2504 int flags, struct nfs_open_context *ctx)
2506 struct path my_path = {
2509 struct path *path = &my_path;
2510 struct nfs4_state *state;
2511 struct rpc_cred *cred = NULL;
2520 sattr->ia_mode &= ~current_umask();
2521 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2523 if (IS_ERR(state)) {
2524 status = PTR_ERR(state);
2527 d_add(dentry, igrab(state->inode));
2528 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2532 nfs4_close_sync(path, state, fmode);
2537 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2539 struct nfs_server *server = NFS_SERVER(dir);
2540 struct nfs_removeargs args = {
2542 .name.len = name->len,
2543 .name.name = name->name,
2544 .bitmask = server->attr_bitmask,
2546 struct nfs_removeres res = {
2549 struct rpc_message msg = {
2550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2554 int status = -ENOMEM;
2556 res.dir_attr = nfs_alloc_fattr();
2557 if (res.dir_attr == NULL)
2560 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2562 update_changeattr(dir, &res.cinfo);
2563 nfs_post_op_update_inode(dir, res.dir_attr);
2565 nfs_free_fattr(res.dir_attr);
2570 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2572 struct nfs4_exception exception = { };
2575 err = nfs4_handle_exception(NFS_SERVER(dir),
2576 _nfs4_proc_remove(dir, name),
2578 } while (exception.retry);
2582 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2584 struct nfs_server *server = NFS_SERVER(dir);
2585 struct nfs_removeargs *args = msg->rpc_argp;
2586 struct nfs_removeres *res = msg->rpc_resp;
2588 args->bitmask = server->cache_consistency_bitmask;
2589 res->server = server;
2590 res->seq_res.sr_slot = NULL;
2591 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2594 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2596 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2598 if (!nfs4_sequence_done(task, &res->seq_res))
2600 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2602 update_changeattr(dir, &res->cinfo);
2603 nfs_post_op_update_inode(dir, res->dir_attr);
2607 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2609 struct nfs_server *server = NFS_SERVER(dir);
2610 struct nfs_renameargs *arg = msg->rpc_argp;
2611 struct nfs_renameres *res = msg->rpc_resp;
2613 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2614 arg->bitmask = server->attr_bitmask;
2615 res->server = server;
2618 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2619 struct inode *new_dir)
2621 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2623 if (!nfs4_sequence_done(task, &res->seq_res))
2625 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2628 update_changeattr(old_dir, &res->old_cinfo);
2629 nfs_post_op_update_inode(old_dir, res->old_fattr);
2630 update_changeattr(new_dir, &res->new_cinfo);
2631 nfs_post_op_update_inode(new_dir, res->new_fattr);
2635 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2636 struct inode *new_dir, struct qstr *new_name)
2638 struct nfs_server *server = NFS_SERVER(old_dir);
2639 struct nfs_renameargs arg = {
2640 .old_dir = NFS_FH(old_dir),
2641 .new_dir = NFS_FH(new_dir),
2642 .old_name = old_name,
2643 .new_name = new_name,
2644 .bitmask = server->attr_bitmask,
2646 struct nfs_renameres res = {
2649 struct rpc_message msg = {
2650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2654 int status = -ENOMEM;
2656 res.old_fattr = nfs_alloc_fattr();
2657 res.new_fattr = nfs_alloc_fattr();
2658 if (res.old_fattr == NULL || res.new_fattr == NULL)
2661 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2663 update_changeattr(old_dir, &res.old_cinfo);
2664 nfs_post_op_update_inode(old_dir, res.old_fattr);
2665 update_changeattr(new_dir, &res.new_cinfo);
2666 nfs_post_op_update_inode(new_dir, res.new_fattr);
2669 nfs_free_fattr(res.new_fattr);
2670 nfs_free_fattr(res.old_fattr);
2674 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2675 struct inode *new_dir, struct qstr *new_name)
2677 struct nfs4_exception exception = { };
2680 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2681 _nfs4_proc_rename(old_dir, old_name,
2684 } while (exception.retry);
2688 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2690 struct nfs_server *server = NFS_SERVER(inode);
2691 struct nfs4_link_arg arg = {
2692 .fh = NFS_FH(inode),
2693 .dir_fh = NFS_FH(dir),
2695 .bitmask = server->attr_bitmask,
2697 struct nfs4_link_res res = {
2700 struct rpc_message msg = {
2701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2705 int status = -ENOMEM;
2707 res.fattr = nfs_alloc_fattr();
2708 res.dir_attr = nfs_alloc_fattr();
2709 if (res.fattr == NULL || res.dir_attr == NULL)
2712 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2714 update_changeattr(dir, &res.cinfo);
2715 nfs_post_op_update_inode(dir, res.dir_attr);
2716 nfs_post_op_update_inode(inode, res.fattr);
2719 nfs_free_fattr(res.dir_attr);
2720 nfs_free_fattr(res.fattr);
2724 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2726 struct nfs4_exception exception = { };
2729 err = nfs4_handle_exception(NFS_SERVER(inode),
2730 _nfs4_proc_link(inode, dir, name),
2732 } while (exception.retry);
2736 struct nfs4_createdata {
2737 struct rpc_message msg;
2738 struct nfs4_create_arg arg;
2739 struct nfs4_create_res res;
2741 struct nfs_fattr fattr;
2742 struct nfs_fattr dir_fattr;
2745 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2746 struct qstr *name, struct iattr *sattr, u32 ftype)
2748 struct nfs4_createdata *data;
2750 data = kzalloc(sizeof(*data), GFP_KERNEL);
2752 struct nfs_server *server = NFS_SERVER(dir);
2754 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2755 data->msg.rpc_argp = &data->arg;
2756 data->msg.rpc_resp = &data->res;
2757 data->arg.dir_fh = NFS_FH(dir);
2758 data->arg.server = server;
2759 data->arg.name = name;
2760 data->arg.attrs = sattr;
2761 data->arg.ftype = ftype;
2762 data->arg.bitmask = server->attr_bitmask;
2763 data->res.server = server;
2764 data->res.fh = &data->fh;
2765 data->res.fattr = &data->fattr;
2766 data->res.dir_fattr = &data->dir_fattr;
2767 nfs_fattr_init(data->res.fattr);
2768 nfs_fattr_init(data->res.dir_fattr);
2773 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2775 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2776 &data->arg, &data->res, 1);
2778 update_changeattr(dir, &data->res.dir_cinfo);
2779 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2780 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2785 static void nfs4_free_createdata(struct nfs4_createdata *data)
2790 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2791 struct page *page, unsigned int len, struct iattr *sattr)
2793 struct nfs4_createdata *data;
2794 int status = -ENAMETOOLONG;
2796 if (len > NFS4_MAXPATHLEN)
2800 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2804 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2805 data->arg.u.symlink.pages = &page;
2806 data->arg.u.symlink.len = len;
2808 status = nfs4_do_create(dir, dentry, data);
2810 nfs4_free_createdata(data);
2815 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2816 struct page *page, unsigned int len, struct iattr *sattr)
2818 struct nfs4_exception exception = { };
2821 err = nfs4_handle_exception(NFS_SERVER(dir),
2822 _nfs4_proc_symlink(dir, dentry, page,
2825 } while (exception.retry);
2829 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2830 struct iattr *sattr)
2832 struct nfs4_createdata *data;
2833 int status = -ENOMEM;
2835 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2839 status = nfs4_do_create(dir, dentry, data);
2841 nfs4_free_createdata(data);
2846 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2847 struct iattr *sattr)
2849 struct nfs4_exception exception = { };
2852 sattr->ia_mode &= ~current_umask();
2854 err = nfs4_handle_exception(NFS_SERVER(dir),
2855 _nfs4_proc_mkdir(dir, dentry, sattr),
2857 } while (exception.retry);
2861 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2862 u64 cookie, struct page **pages, unsigned int count, int plus)
2864 struct inode *dir = dentry->d_inode;
2865 struct nfs4_readdir_arg args = {
2870 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2873 struct nfs4_readdir_res res;
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2882 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2883 dentry->d_parent->d_name.name,
2884 dentry->d_name.name,
2885 (unsigned long long)cookie);
2886 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2887 res.pgbase = args.pgbase;
2888 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2890 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2891 status += args.pgbase;
2894 nfs_invalidate_atime(dir);
2896 dprintk("%s: returns %d\n", __func__, status);
2900 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2901 u64 cookie, struct page **pages, unsigned int count, int plus)
2903 struct nfs4_exception exception = { };
2906 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2907 _nfs4_proc_readdir(dentry, cred, cookie,
2908 pages, count, plus),
2910 } while (exception.retry);
2914 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2915 struct iattr *sattr, dev_t rdev)
2917 struct nfs4_createdata *data;
2918 int mode = sattr->ia_mode;
2919 int status = -ENOMEM;
2921 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2922 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2924 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2929 data->arg.ftype = NF4FIFO;
2930 else if (S_ISBLK(mode)) {
2931 data->arg.ftype = NF4BLK;
2932 data->arg.u.device.specdata1 = MAJOR(rdev);
2933 data->arg.u.device.specdata2 = MINOR(rdev);
2935 else if (S_ISCHR(mode)) {
2936 data->arg.ftype = NF4CHR;
2937 data->arg.u.device.specdata1 = MAJOR(rdev);
2938 data->arg.u.device.specdata2 = MINOR(rdev);
2941 status = nfs4_do_create(dir, dentry, data);
2943 nfs4_free_createdata(data);
2948 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2949 struct iattr *sattr, dev_t rdev)
2951 struct nfs4_exception exception = { };
2954 sattr->ia_mode &= ~current_umask();
2956 err = nfs4_handle_exception(NFS_SERVER(dir),
2957 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2959 } while (exception.retry);
2963 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2964 struct nfs_fsstat *fsstat)
2966 struct nfs4_statfs_arg args = {
2968 .bitmask = server->attr_bitmask,
2970 struct nfs4_statfs_res res = {
2973 struct rpc_message msg = {
2974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2979 nfs_fattr_init(fsstat->fattr);
2980 return nfs4_call_sync(server, &msg, &args, &res, 0);
2983 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2985 struct nfs4_exception exception = { };
2988 err = nfs4_handle_exception(server,
2989 _nfs4_proc_statfs(server, fhandle, fsstat),
2991 } while (exception.retry);
2995 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2996 struct nfs_fsinfo *fsinfo)
2998 struct nfs4_fsinfo_arg args = {
3000 .bitmask = server->attr_bitmask,
3002 struct nfs4_fsinfo_res res = {
3005 struct rpc_message msg = {
3006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3011 return nfs4_call_sync(server, &msg, &args, &res, 0);
3014 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3016 struct nfs4_exception exception = { };
3020 err = nfs4_handle_exception(server,
3021 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3023 } while (exception.retry);
3027 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3029 nfs_fattr_init(fsinfo->fattr);
3030 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3033 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3034 struct nfs_pathconf *pathconf)
3036 struct nfs4_pathconf_arg args = {
3038 .bitmask = server->attr_bitmask,
3040 struct nfs4_pathconf_res res = {
3041 .pathconf = pathconf,
3043 struct rpc_message msg = {
3044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3049 /* None of the pathconf attributes are mandatory to implement */
3050 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3051 memset(pathconf, 0, sizeof(*pathconf));
3055 nfs_fattr_init(pathconf->fattr);
3056 return nfs4_call_sync(server, &msg, &args, &res, 0);
3059 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3060 struct nfs_pathconf *pathconf)
3062 struct nfs4_exception exception = { };
3066 err = nfs4_handle_exception(server,
3067 _nfs4_proc_pathconf(server, fhandle, pathconf),
3069 } while (exception.retry);
3073 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3075 struct nfs_server *server = NFS_SERVER(data->inode);
3077 dprintk("--> %s\n", __func__);
3079 if (!nfs4_sequence_done(task, &data->res.seq_res))
3082 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3083 nfs_restart_rpc(task, server->nfs_client);
3087 nfs_invalidate_atime(data->inode);
3088 if (task->tk_status > 0)
3089 renew_lease(server, data->timestamp);
3093 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3095 data->timestamp = jiffies;
3096 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3099 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3101 struct inode *inode = data->inode;
3103 if (!nfs4_sequence_done(task, &data->res.seq_res))
3106 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3107 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3110 if (task->tk_status >= 0) {
3111 renew_lease(NFS_SERVER(inode), data->timestamp);
3112 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3117 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3119 struct nfs_server *server = NFS_SERVER(data->inode);
3121 data->args.bitmask = server->cache_consistency_bitmask;
3122 data->res.server = server;
3123 data->timestamp = jiffies;
3125 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3128 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3130 struct inode *inode = data->inode;
3132 if (!nfs4_sequence_done(task, &data->res.seq_res))
3135 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3136 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3139 nfs_refresh_inode(inode, data->res.fattr);
3143 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3145 struct nfs_server *server = NFS_SERVER(data->inode);
3147 data->args.bitmask = server->cache_consistency_bitmask;
3148 data->res.server = server;
3149 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3152 struct nfs4_renewdata {
3153 struct nfs_client *client;
3154 unsigned long timestamp;
3158 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3159 * standalone procedure for queueing an asynchronous RENEW.
3161 static void nfs4_renew_release(void *calldata)
3163 struct nfs4_renewdata *data = calldata;
3164 struct nfs_client *clp = data->client;
3166 if (atomic_read(&clp->cl_count) > 1)
3167 nfs4_schedule_state_renewal(clp);
3168 nfs_put_client(clp);
3172 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3174 struct nfs4_renewdata *data = calldata;
3175 struct nfs_client *clp = data->client;
3176 unsigned long timestamp = data->timestamp;
3178 if (task->tk_status < 0) {
3179 /* Unless we're shutting down, schedule state recovery! */
3180 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3181 nfs4_schedule_lease_recovery(clp);
3184 do_renew_lease(clp, timestamp);
3187 static const struct rpc_call_ops nfs4_renew_ops = {
3188 .rpc_call_done = nfs4_renew_done,
3189 .rpc_release = nfs4_renew_release,
3192 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3199 struct nfs4_renewdata *data;
3201 if (!atomic_inc_not_zero(&clp->cl_count))
3203 data = kmalloc(sizeof(*data), GFP_KERNEL);
3207 data->timestamp = jiffies;
3208 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3209 &nfs4_renew_ops, data);
3212 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3214 struct rpc_message msg = {
3215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3219 unsigned long now = jiffies;
3222 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3225 do_renew_lease(clp, now);
3229 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3231 return (server->caps & NFS_CAP_ACLS)
3232 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3233 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3236 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3237 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3240 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3242 static void buf_to_pages(const void *buf, size_t buflen,
3243 struct page **pages, unsigned int *pgbase)
3245 const void *p = buf;
3247 *pgbase = offset_in_page(buf);
3249 while (p < buf + buflen) {
3250 *(pages++) = virt_to_page(p);
3251 p += PAGE_CACHE_SIZE;
3255 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3256 struct page **pages, unsigned int *pgbase)
3258 struct page *newpage, **spages;
3264 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3265 newpage = alloc_page(GFP_KERNEL);
3267 if (newpage == NULL)
3269 memcpy(page_address(newpage), buf, len);
3274 } while (buflen != 0);
3280 __free_page(spages[rc-1]);
3284 struct nfs4_cached_acl {
3290 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3292 struct nfs_inode *nfsi = NFS_I(inode);
3294 spin_lock(&inode->i_lock);
3295 kfree(nfsi->nfs4_acl);
3296 nfsi->nfs4_acl = acl;
3297 spin_unlock(&inode->i_lock);
3300 static void nfs4_zap_acl_attr(struct inode *inode)
3302 nfs4_set_cached_acl(inode, NULL);
3305 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3307 struct nfs_inode *nfsi = NFS_I(inode);
3308 struct nfs4_cached_acl *acl;
3311 spin_lock(&inode->i_lock);
3312 acl = nfsi->nfs4_acl;
3315 if (buf == NULL) /* user is just asking for length */
3317 if (acl->cached == 0)
3319 ret = -ERANGE; /* see getxattr(2) man page */
3320 if (acl->len > buflen)
3322 memcpy(buf, acl->data, acl->len);
3326 spin_unlock(&inode->i_lock);
3330 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3332 struct nfs4_cached_acl *acl;
3334 if (buf && acl_len <= PAGE_SIZE) {
3335 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3339 memcpy(acl->data, buf, acl_len);
3341 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3348 nfs4_set_cached_acl(inode, acl);
3351 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3353 struct page *pages[NFS4ACL_MAXPAGES];
3354 struct nfs_getaclargs args = {
3355 .fh = NFS_FH(inode),
3359 struct nfs_getaclres res = {
3363 struct rpc_message msg = {
3364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3368 struct page *localpage = NULL;
3371 if (buflen < PAGE_SIZE) {
3372 /* As long as we're doing a round trip to the server anyway,
3373 * let's be prepared for a page of acl data. */
3374 localpage = alloc_page(GFP_KERNEL);
3375 resp_buf = page_address(localpage);
3376 if (localpage == NULL)
3378 args.acl_pages[0] = localpage;
3379 args.acl_pgbase = 0;
3380 args.acl_len = PAGE_SIZE;
3383 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3385 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3388 if (res.acl_len > args.acl_len)
3389 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3391 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3394 if (res.acl_len > buflen)
3397 memcpy(buf, resp_buf, res.acl_len);
3402 __free_page(localpage);
3406 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3408 struct nfs4_exception exception = { };
3411 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3414 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3415 } while (exception.retry);
3419 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3421 struct nfs_server *server = NFS_SERVER(inode);
3424 if (!nfs4_server_supports_acls(server))
3426 ret = nfs_revalidate_inode(server, inode);
3429 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3430 nfs_zap_acl_cache(inode);
3431 ret = nfs4_read_cached_acl(inode, buf, buflen);
3434 return nfs4_get_acl_uncached(inode, buf, buflen);
3437 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3439 struct nfs_server *server = NFS_SERVER(inode);
3440 struct page *pages[NFS4ACL_MAXPAGES];
3441 struct nfs_setaclargs arg = {
3442 .fh = NFS_FH(inode),
3446 struct nfs_setaclres res;
3447 struct rpc_message msg = {
3448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3454 if (!nfs4_server_supports_acls(server))
3456 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3459 nfs_inode_return_delegation(inode);
3460 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3463 * Free each page after tx, so the only ref left is
3464 * held by the network stack
3467 put_page(pages[i-1]);
3470 * Acl update can result in inode attribute update.
3471 * so mark the attribute cache invalid.
3473 spin_lock(&inode->i_lock);
3474 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3475 spin_unlock(&inode->i_lock);
3476 nfs_access_zap_cache(inode);
3477 nfs_zap_acl_cache(inode);
3481 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3483 struct nfs4_exception exception = { };
3486 err = nfs4_handle_exception(NFS_SERVER(inode),
3487 __nfs4_proc_set_acl(inode, buf, buflen),
3489 } while (exception.retry);
3494 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3496 struct nfs_client *clp = server->nfs_client;
3498 if (task->tk_status >= 0)
3500 switch(task->tk_status) {
3501 case -NFS4ERR_ADMIN_REVOKED:
3502 case -NFS4ERR_BAD_STATEID:
3503 case -NFS4ERR_OPENMODE:
3506 nfs4_schedule_stateid_recovery(server, state);
3507 goto wait_on_recovery;
3508 case -NFS4ERR_STALE_STATEID:
3509 case -NFS4ERR_STALE_CLIENTID:
3510 case -NFS4ERR_EXPIRED:
3511 nfs4_schedule_lease_recovery(clp);
3512 goto wait_on_recovery;
3513 #if defined(CONFIG_NFS_V4_1)
3514 case -NFS4ERR_BADSESSION:
3515 case -NFS4ERR_BADSLOT:
3516 case -NFS4ERR_BAD_HIGH_SLOT:
3517 case -NFS4ERR_DEADSESSION:
3518 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3519 case -NFS4ERR_SEQ_FALSE_RETRY:
3520 case -NFS4ERR_SEQ_MISORDERED:
3521 dprintk("%s ERROR %d, Reset session\n", __func__,
3523 nfs4_schedule_session_recovery(clp->cl_session);
3524 task->tk_status = 0;
3526 #endif /* CONFIG_NFS_V4_1 */
3527 case -NFS4ERR_DELAY:
3528 nfs_inc_server_stats(server, NFSIOS_DELAY);
3529 case -NFS4ERR_GRACE:
3531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3532 task->tk_status = 0;
3534 case -NFS4ERR_OLD_STATEID:
3535 task->tk_status = 0;
3538 task->tk_status = nfs4_map_errors(task->tk_status);
3541 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3542 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3543 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3544 task->tk_status = 0;
3548 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3549 unsigned short port, struct rpc_cred *cred,
3550 struct nfs4_setclientid_res *res)
3552 nfs4_verifier sc_verifier;
3553 struct nfs4_setclientid setclientid = {
3554 .sc_verifier = &sc_verifier,
3556 .sc_cb_ident = clp->cl_cb_ident,
3558 struct rpc_message msg = {
3559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3560 .rpc_argp = &setclientid,
3568 p = (__be32*)sc_verifier.data;
3569 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3570 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3573 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3574 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3576 rpc_peeraddr2str(clp->cl_rpcclient,
3578 rpc_peeraddr2str(clp->cl_rpcclient,
3580 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3581 clp->cl_id_uniquifier);
3582 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3583 sizeof(setclientid.sc_netid),
3584 rpc_peeraddr2str(clp->cl_rpcclient,
3585 RPC_DISPLAY_NETID));
3586 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3587 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3588 clp->cl_ipaddr, port >> 8, port & 255);
3590 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3591 if (status != -NFS4ERR_CLID_INUSE)
3596 ssleep(clp->cl_lease_time / HZ + 1);
3598 if (++clp->cl_id_uniquifier == 0)
3604 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3605 struct nfs4_setclientid_res *arg,
3606 struct rpc_cred *cred)
3608 struct nfs_fsinfo fsinfo;
3609 struct rpc_message msg = {
3610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3612 .rpc_resp = &fsinfo,
3619 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3621 spin_lock(&clp->cl_lock);
3622 clp->cl_lease_time = fsinfo.lease_time * HZ;
3623 clp->cl_last_renewal = now;
3624 spin_unlock(&clp->cl_lock);
3629 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3630 struct nfs4_setclientid_res *arg,
3631 struct rpc_cred *cred)
3636 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3640 case -NFS4ERR_RESOURCE:
3641 /* The IBM lawyers misread another document! */
3642 case -NFS4ERR_DELAY:
3643 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3649 struct nfs4_delegreturndata {
3650 struct nfs4_delegreturnargs args;
3651 struct nfs4_delegreturnres res;
3653 nfs4_stateid stateid;
3654 unsigned long timestamp;
3655 struct nfs_fattr fattr;
3659 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3661 struct nfs4_delegreturndata *data = calldata;
3663 if (!nfs4_sequence_done(task, &data->res.seq_res))
3666 switch (task->tk_status) {
3667 case -NFS4ERR_STALE_STATEID:
3668 case -NFS4ERR_EXPIRED:
3670 renew_lease(data->res.server, data->timestamp);
3673 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3675 nfs_restart_rpc(task, data->res.server->nfs_client);
3679 data->rpc_status = task->tk_status;
3682 static void nfs4_delegreturn_release(void *calldata)
3687 #if defined(CONFIG_NFS_V4_1)
3688 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3690 struct nfs4_delegreturndata *d_data;
3692 d_data = (struct nfs4_delegreturndata *)data;
3694 if (nfs4_setup_sequence(d_data->res.server,
3695 &d_data->args.seq_args,
3696 &d_data->res.seq_res, 1, task))
3698 rpc_call_start(task);
3700 #endif /* CONFIG_NFS_V4_1 */
3702 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3703 #if defined(CONFIG_NFS_V4_1)
3704 .rpc_call_prepare = nfs4_delegreturn_prepare,
3705 #endif /* CONFIG_NFS_V4_1 */
3706 .rpc_call_done = nfs4_delegreturn_done,
3707 .rpc_release = nfs4_delegreturn_release,
3710 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3712 struct nfs4_delegreturndata *data;
3713 struct nfs_server *server = NFS_SERVER(inode);
3714 struct rpc_task *task;
3715 struct rpc_message msg = {
3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3719 struct rpc_task_setup task_setup_data = {
3720 .rpc_client = server->client,
3721 .rpc_message = &msg,
3722 .callback_ops = &nfs4_delegreturn_ops,
3723 .flags = RPC_TASK_ASYNC,
3727 data = kzalloc(sizeof(*data), GFP_NOFS);
3730 data->args.fhandle = &data->fh;
3731 data->args.stateid = &data->stateid;
3732 data->args.bitmask = server->attr_bitmask;
3733 nfs_copy_fh(&data->fh, NFS_FH(inode));
3734 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3735 data->res.fattr = &data->fattr;
3736 data->res.server = server;
3737 nfs_fattr_init(data->res.fattr);
3738 data->timestamp = jiffies;
3739 data->rpc_status = 0;
3741 task_setup_data.callback_data = data;
3742 msg.rpc_argp = &data->args;
3743 msg.rpc_resp = &data->res;
3744 task = rpc_run_task(&task_setup_data);
3746 return PTR_ERR(task);
3749 status = nfs4_wait_for_completion_rpc_task(task);
3752 status = data->rpc_status;
3755 nfs_refresh_inode(inode, &data->fattr);
3761 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3763 struct nfs_server *server = NFS_SERVER(inode);
3764 struct nfs4_exception exception = { };
3767 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3769 case -NFS4ERR_STALE_STATEID:
3770 case -NFS4ERR_EXPIRED:
3774 err = nfs4_handle_exception(server, err, &exception);
3775 } while (exception.retry);
3779 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3780 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3783 * sleep, with exponential backoff, and retry the LOCK operation.
3785 static unsigned long
3786 nfs4_set_lock_task_retry(unsigned long timeout)
3788 schedule_timeout_killable(timeout);
3790 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3791 return NFS4_LOCK_MAXTIMEOUT;
3795 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3797 struct inode *inode = state->inode;
3798 struct nfs_server *server = NFS_SERVER(inode);
3799 struct nfs_client *clp = server->nfs_client;
3800 struct nfs_lockt_args arg = {
3801 .fh = NFS_FH(inode),
3804 struct nfs_lockt_res res = {
3807 struct rpc_message msg = {
3808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3811 .rpc_cred = state->owner->so_cred,
3813 struct nfs4_lock_state *lsp;
3816 arg.lock_owner.clientid = clp->cl_clientid;
3817 status = nfs4_set_lock_state(state, request);
3820 lsp = request->fl_u.nfs4_fl.owner;
3821 arg.lock_owner.id = lsp->ls_id.id;
3822 arg.lock_owner.s_dev = server->s_dev;
3823 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3826 request->fl_type = F_UNLCK;
3828 case -NFS4ERR_DENIED:
3831 request->fl_ops->fl_release_private(request);
3836 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3838 struct nfs4_exception exception = { };
3842 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3843 _nfs4_proc_getlk(state, cmd, request),
3845 } while (exception.retry);
3849 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3852 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3854 res = posix_lock_file_wait(file, fl);
3857 res = flock_lock_file_wait(file, fl);
3865 struct nfs4_unlockdata {
3866 struct nfs_locku_args arg;
3867 struct nfs_locku_res res;
3868 struct nfs4_lock_state *lsp;
3869 struct nfs_open_context *ctx;
3870 struct file_lock fl;
3871 const struct nfs_server *server;
3872 unsigned long timestamp;
3875 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3876 struct nfs_open_context *ctx,
3877 struct nfs4_lock_state *lsp,
3878 struct nfs_seqid *seqid)
3880 struct nfs4_unlockdata *p;
3881 struct inode *inode = lsp->ls_state->inode;
3883 p = kzalloc(sizeof(*p), GFP_NOFS);
3886 p->arg.fh = NFS_FH(inode);
3888 p->arg.seqid = seqid;
3889 p->res.seqid = seqid;
3890 p->arg.stateid = &lsp->ls_stateid;
3892 atomic_inc(&lsp->ls_count);
3893 /* Ensure we don't close file until we're done freeing locks! */
3894 p->ctx = get_nfs_open_context(ctx);
3895 memcpy(&p->fl, fl, sizeof(p->fl));
3896 p->server = NFS_SERVER(inode);
3900 static void nfs4_locku_release_calldata(void *data)
3902 struct nfs4_unlockdata *calldata = data;
3903 nfs_free_seqid(calldata->arg.seqid);
3904 nfs4_put_lock_state(calldata->lsp);
3905 put_nfs_open_context(calldata->ctx);
3909 static void nfs4_locku_done(struct rpc_task *task, void *data)
3911 struct nfs4_unlockdata *calldata = data;
3913 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3915 switch (task->tk_status) {
3917 memcpy(calldata->lsp->ls_stateid.data,
3918 calldata->res.stateid.data,
3919 sizeof(calldata->lsp->ls_stateid.data));
3920 renew_lease(calldata->server, calldata->timestamp);
3922 case -NFS4ERR_BAD_STATEID:
3923 case -NFS4ERR_OLD_STATEID:
3924 case -NFS4ERR_STALE_STATEID:
3925 case -NFS4ERR_EXPIRED:
3928 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3929 nfs_restart_rpc(task,
3930 calldata->server->nfs_client);
3934 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3936 struct nfs4_unlockdata *calldata = data;
3938 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3940 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3941 /* Note: exit _without_ running nfs4_locku_done */
3942 task->tk_action = NULL;
3945 calldata->timestamp = jiffies;
3946 if (nfs4_setup_sequence(calldata->server,
3947 &calldata->arg.seq_args,
3948 &calldata->res.seq_res, 1, task))
3950 rpc_call_start(task);
3953 static const struct rpc_call_ops nfs4_locku_ops = {
3954 .rpc_call_prepare = nfs4_locku_prepare,
3955 .rpc_call_done = nfs4_locku_done,
3956 .rpc_release = nfs4_locku_release_calldata,
3959 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3960 struct nfs_open_context *ctx,
3961 struct nfs4_lock_state *lsp,
3962 struct nfs_seqid *seqid)
3964 struct nfs4_unlockdata *data;
3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3967 .rpc_cred = ctx->cred,
3969 struct rpc_task_setup task_setup_data = {
3970 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3971 .rpc_message = &msg,
3972 .callback_ops = &nfs4_locku_ops,
3973 .workqueue = nfsiod_workqueue,
3974 .flags = RPC_TASK_ASYNC,
3977 /* Ensure this is an unlock - when canceling a lock, the
3978 * canceled lock is passed in, and it won't be an unlock.
3980 fl->fl_type = F_UNLCK;
3982 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3984 nfs_free_seqid(seqid);
3985 return ERR_PTR(-ENOMEM);
3988 msg.rpc_argp = &data->arg;
3989 msg.rpc_resp = &data->res;
3990 task_setup_data.callback_data = data;
3991 return rpc_run_task(&task_setup_data);
3994 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3996 struct nfs_inode *nfsi = NFS_I(state->inode);
3997 struct nfs_seqid *seqid;
3998 struct nfs4_lock_state *lsp;
3999 struct rpc_task *task;
4001 unsigned char fl_flags = request->fl_flags;
4003 status = nfs4_set_lock_state(state, request);
4004 /* Unlock _before_ we do the RPC call */
4005 request->fl_flags |= FL_EXISTS;
4006 down_read(&nfsi->rwsem);
4007 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4008 up_read(&nfsi->rwsem);
4011 up_read(&nfsi->rwsem);
4014 /* Is this a delegated lock? */
4015 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4017 lsp = request->fl_u.nfs4_fl.owner;
4018 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4022 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4023 status = PTR_ERR(task);
4026 status = nfs4_wait_for_completion_rpc_task(task);
4029 request->fl_flags = fl_flags;
4033 struct nfs4_lockdata {
4034 struct nfs_lock_args arg;
4035 struct nfs_lock_res res;
4036 struct nfs4_lock_state *lsp;
4037 struct nfs_open_context *ctx;
4038 struct file_lock fl;
4039 unsigned long timestamp;
4042 struct nfs_server *server;
4045 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4046 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4049 struct nfs4_lockdata *p;
4050 struct inode *inode = lsp->ls_state->inode;
4051 struct nfs_server *server = NFS_SERVER(inode);
4053 p = kzalloc(sizeof(*p), gfp_mask);
4057 p->arg.fh = NFS_FH(inode);
4059 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4060 if (p->arg.open_seqid == NULL)
4062 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4063 if (p->arg.lock_seqid == NULL)
4064 goto out_free_seqid;
4065 p->arg.lock_stateid = &lsp->ls_stateid;
4066 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4067 p->arg.lock_owner.id = lsp->ls_id.id;
4068 p->arg.lock_owner.s_dev = server->s_dev;
4069 p->res.lock_seqid = p->arg.lock_seqid;
4072 atomic_inc(&lsp->ls_count);
4073 p->ctx = get_nfs_open_context(ctx);
4074 memcpy(&p->fl, fl, sizeof(p->fl));
4077 nfs_free_seqid(p->arg.open_seqid);
4083 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4085 struct nfs4_lockdata *data = calldata;
4086 struct nfs4_state *state = data->lsp->ls_state;
4088 dprintk("%s: begin!\n", __func__);
4089 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4091 /* Do we need to do an open_to_lock_owner? */
4092 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4093 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4095 data->arg.open_stateid = &state->stateid;
4096 data->arg.new_lock_owner = 1;
4097 data->res.open_seqid = data->arg.open_seqid;
4099 data->arg.new_lock_owner = 0;
4100 data->timestamp = jiffies;
4101 if (nfs4_setup_sequence(data->server,
4102 &data->arg.seq_args,
4103 &data->res.seq_res, 1, task))
4105 rpc_call_start(task);
4106 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4109 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4111 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4112 nfs4_lock_prepare(task, calldata);
4115 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4117 struct nfs4_lockdata *data = calldata;
4119 dprintk("%s: begin!\n", __func__);
4121 if (!nfs4_sequence_done(task, &data->res.seq_res))
4124 data->rpc_status = task->tk_status;
4125 if (data->arg.new_lock_owner != 0) {
4126 if (data->rpc_status == 0)
4127 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4131 if (data->rpc_status == 0) {
4132 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4133 sizeof(data->lsp->ls_stateid.data));
4134 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4135 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4138 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4141 static void nfs4_lock_release(void *calldata)
4143 struct nfs4_lockdata *data = calldata;
4145 dprintk("%s: begin!\n", __func__);
4146 nfs_free_seqid(data->arg.open_seqid);
4147 if (data->cancelled != 0) {
4148 struct rpc_task *task;
4149 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4150 data->arg.lock_seqid);
4152 rpc_put_task_async(task);
4153 dprintk("%s: cancelling lock!\n", __func__);
4155 nfs_free_seqid(data->arg.lock_seqid);
4156 nfs4_put_lock_state(data->lsp);
4157 put_nfs_open_context(data->ctx);
4159 dprintk("%s: done!\n", __func__);
4162 static const struct rpc_call_ops nfs4_lock_ops = {
4163 .rpc_call_prepare = nfs4_lock_prepare,
4164 .rpc_call_done = nfs4_lock_done,
4165 .rpc_release = nfs4_lock_release,
4168 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4169 .rpc_call_prepare = nfs4_recover_lock_prepare,
4170 .rpc_call_done = nfs4_lock_done,
4171 .rpc_release = nfs4_lock_release,
4174 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4176 struct nfs_client *clp = server->nfs_client;
4177 struct nfs4_state *state = lsp->ls_state;
4180 case -NFS4ERR_ADMIN_REVOKED:
4181 case -NFS4ERR_BAD_STATEID:
4182 case -NFS4ERR_EXPIRED:
4183 if (new_lock_owner != 0 ||
4184 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4185 nfs4_state_mark_reclaim_nograce(clp, state);
4186 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4188 case -NFS4ERR_STALE_STATEID:
4189 if (new_lock_owner != 0 ||
4190 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4191 nfs4_state_mark_reclaim_reboot(clp, state);
4192 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4196 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4198 struct nfs4_lockdata *data;
4199 struct rpc_task *task;
4200 struct rpc_message msg = {
4201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4202 .rpc_cred = state->owner->so_cred,
4204 struct rpc_task_setup task_setup_data = {
4205 .rpc_client = NFS_CLIENT(state->inode),
4206 .rpc_message = &msg,
4207 .callback_ops = &nfs4_lock_ops,
4208 .workqueue = nfsiod_workqueue,
4209 .flags = RPC_TASK_ASYNC,
4213 dprintk("%s: begin!\n", __func__);
4214 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4215 fl->fl_u.nfs4_fl.owner,
4216 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4220 data->arg.block = 1;
4221 if (recovery_type > NFS_LOCK_NEW) {
4222 if (recovery_type == NFS_LOCK_RECLAIM)
4223 data->arg.reclaim = NFS_LOCK_RECLAIM;
4224 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4226 msg.rpc_argp = &data->arg;
4227 msg.rpc_resp = &data->res;
4228 task_setup_data.callback_data = data;
4229 task = rpc_run_task(&task_setup_data);
4231 return PTR_ERR(task);
4232 ret = nfs4_wait_for_completion_rpc_task(task);
4234 ret = data->rpc_status;
4236 nfs4_handle_setlk_error(data->server, data->lsp,
4237 data->arg.new_lock_owner, ret);
4239 data->cancelled = 1;
4241 dprintk("%s: done, ret = %d!\n", __func__, ret);
4245 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4247 struct nfs_server *server = NFS_SERVER(state->inode);
4248 struct nfs4_exception exception = { };
4252 /* Cache the lock if possible... */
4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4255 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4256 if (err != -NFS4ERR_DELAY)
4258 nfs4_handle_exception(server, err, &exception);
4259 } while (exception.retry);
4263 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4265 struct nfs_server *server = NFS_SERVER(state->inode);
4266 struct nfs4_exception exception = { };
4269 err = nfs4_set_lock_state(state, request);
4273 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4275 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4279 case -NFS4ERR_GRACE:
4280 case -NFS4ERR_DELAY:
4281 nfs4_handle_exception(server, err, &exception);
4284 } while (exception.retry);
4289 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4291 struct nfs_inode *nfsi = NFS_I(state->inode);
4292 unsigned char fl_flags = request->fl_flags;
4293 int status = -ENOLCK;
4295 if ((fl_flags & FL_POSIX) &&
4296 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4298 /* Is this a delegated open? */
4299 status = nfs4_set_lock_state(state, request);
4302 request->fl_flags |= FL_ACCESS;
4303 status = do_vfs_lock(request->fl_file, request);
4306 down_read(&nfsi->rwsem);
4307 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4308 /* Yes: cache locks! */
4309 /* ...but avoid races with delegation recall... */
4310 request->fl_flags = fl_flags & ~FL_SLEEP;
4311 status = do_vfs_lock(request->fl_file, request);
4314 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4317 /* Note: we always want to sleep here! */
4318 request->fl_flags = fl_flags | FL_SLEEP;
4319 if (do_vfs_lock(request->fl_file, request) < 0)
4320 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4322 up_read(&nfsi->rwsem);
4324 request->fl_flags = fl_flags;
4328 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4330 struct nfs4_exception exception = { };
4334 err = _nfs4_proc_setlk(state, cmd, request);
4335 if (err == -NFS4ERR_DENIED)
4337 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4339 } while (exception.retry);
4344 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4346 struct nfs_open_context *ctx;
4347 struct nfs4_state *state;
4348 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4351 /* verify open state */
4352 ctx = nfs_file_open_context(filp);
4355 if (request->fl_start < 0 || request->fl_end < 0)
4358 if (IS_GETLK(cmd)) {
4360 return nfs4_proc_getlk(state, F_GETLK, request);
4364 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4367 if (request->fl_type == F_UNLCK) {
4369 return nfs4_proc_unlck(state, cmd, request);
4376 status = nfs4_proc_setlk(state, cmd, request);
4377 if ((status != -EAGAIN) || IS_SETLK(cmd))
4379 timeout = nfs4_set_lock_task_retry(timeout);
4380 status = -ERESTARTSYS;
4383 } while(status < 0);
4387 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4389 struct nfs_server *server = NFS_SERVER(state->inode);
4390 struct nfs4_exception exception = { };
4393 err = nfs4_set_lock_state(state, fl);
4397 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4400 printk(KERN_ERR "%s: unhandled error %d.\n",
4405 case -NFS4ERR_EXPIRED:
4406 case -NFS4ERR_STALE_CLIENTID:
4407 case -NFS4ERR_STALE_STATEID:
4408 nfs4_schedule_lease_recovery(server->nfs_client);
4410 case -NFS4ERR_BADSESSION:
4411 case -NFS4ERR_BADSLOT:
4412 case -NFS4ERR_BAD_HIGH_SLOT:
4413 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4414 case -NFS4ERR_DEADSESSION:
4415 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4419 * The show must go on: exit, but mark the
4420 * stateid as needing recovery.
4422 case -NFS4ERR_ADMIN_REVOKED:
4423 case -NFS4ERR_BAD_STATEID:
4424 case -NFS4ERR_OPENMODE:
4425 nfs4_schedule_stateid_recovery(server, state);
4430 * User RPCSEC_GSS context has expired.
4431 * We cannot recover this stateid now, so
4432 * skip it and allow recovery thread to
4438 case -NFS4ERR_DENIED:
4439 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4442 case -NFS4ERR_DELAY:
4445 err = nfs4_handle_exception(server, err, &exception);
4446 } while (exception.retry);
4451 static void nfs4_release_lockowner_release(void *calldata)
4456 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4457 .rpc_release = nfs4_release_lockowner_release,
4460 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4462 struct nfs_server *server = lsp->ls_state->owner->so_server;
4463 struct nfs_release_lockowner_args *args;
4464 struct rpc_message msg = {
4465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4468 if (server->nfs_client->cl_mvops->minor_version != 0)
4470 args = kmalloc(sizeof(*args), GFP_NOFS);
4473 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4474 args->lock_owner.id = lsp->ls_id.id;
4475 args->lock_owner.s_dev = server->s_dev;
4476 msg.rpc_argp = args;
4477 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4480 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4482 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4483 const void *buf, size_t buflen,
4484 int flags, int type)
4486 if (strcmp(key, "") != 0)
4489 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4492 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4493 void *buf, size_t buflen, int type)
4495 if (strcmp(key, "") != 0)
4498 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4501 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4502 size_t list_len, const char *name,
4503 size_t name_len, int type)
4505 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4507 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4510 if (list && len <= list_len)
4511 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4515 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4517 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4518 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4519 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4522 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4523 NFS_ATTR_FATTR_NLINK;
4524 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4528 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4529 struct nfs4_fs_locations *fs_locations, struct page *page)
4531 struct nfs_server *server = NFS_SERVER(dir);
4533 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4534 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4536 struct nfs4_fs_locations_arg args = {
4537 .dir_fh = NFS_FH(dir),
4542 struct nfs4_fs_locations_res res = {
4543 .fs_locations = fs_locations,
4545 struct rpc_message msg = {
4546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4552 dprintk("%s: start\n", __func__);
4553 nfs_fattr_init(&fs_locations->fattr);
4554 fs_locations->server = server;
4555 fs_locations->nlocations = 0;
4556 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4557 nfs_fixup_referral_attributes(&fs_locations->fattr);
4558 dprintk("%s: returned status = %d\n", __func__, status);
4562 #ifdef CONFIG_NFS_V4_1
4564 * Check the exchange flags returned by the server for invalid flags, having
4565 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4568 static int nfs4_check_cl_exchange_flags(u32 flags)
4570 if (flags & ~EXCHGID4_FLAG_MASK_R)
4572 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4573 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4575 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4579 return -NFS4ERR_INVAL;
4583 * nfs4_proc_exchange_id()
4585 * Since the clientid has expired, all compounds using sessions
4586 * associated with the stale clientid will be returning
4587 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4588 * be in some phase of session reset.
4590 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4592 nfs4_verifier verifier;
4593 struct nfs41_exchange_id_args args = {
4595 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4597 struct nfs41_exchange_id_res res = {
4601 struct rpc_message msg = {
4602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4609 dprintk("--> %s\n", __func__);
4610 BUG_ON(clp == NULL);
4612 p = (u32 *)verifier.data;
4613 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4614 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4615 args.verifier = &verifier;
4617 args.id_len = scnprintf(args.id, sizeof(args.id),
4620 init_utsname()->nodename,
4621 init_utsname()->domainname,
4622 clp->cl_rpcclient->cl_auth->au_flavor);
4624 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4626 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4627 dprintk("<-- %s status= %d\n", __func__, status);
4631 struct nfs4_get_lease_time_data {
4632 struct nfs4_get_lease_time_args *args;
4633 struct nfs4_get_lease_time_res *res;
4634 struct nfs_client *clp;
4637 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4641 struct nfs4_get_lease_time_data *data =
4642 (struct nfs4_get_lease_time_data *)calldata;
4644 dprintk("--> %s\n", __func__);
4645 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4646 /* just setup sequence, do not trigger session recovery
4647 since we're invoked within one */
4648 ret = nfs41_setup_sequence(data->clp->cl_session,
4649 &data->args->la_seq_args,
4650 &data->res->lr_seq_res, 0, task);
4652 BUG_ON(ret == -EAGAIN);
4653 rpc_call_start(task);
4654 dprintk("<-- %s\n", __func__);
4658 * Called from nfs4_state_manager thread for session setup, so don't recover
4659 * from sequence operation or clientid errors.
4661 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4663 struct nfs4_get_lease_time_data *data =
4664 (struct nfs4_get_lease_time_data *)calldata;
4666 dprintk("--> %s\n", __func__);
4667 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4669 switch (task->tk_status) {
4670 case -NFS4ERR_DELAY:
4671 case -NFS4ERR_GRACE:
4672 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4673 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4674 task->tk_status = 0;
4675 nfs_restart_rpc(task, data->clp);
4678 dprintk("<-- %s\n", __func__);
4681 struct rpc_call_ops nfs4_get_lease_time_ops = {
4682 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4683 .rpc_call_done = nfs4_get_lease_time_done,
4686 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4688 struct rpc_task *task;
4689 struct nfs4_get_lease_time_args args;
4690 struct nfs4_get_lease_time_res res = {
4691 .lr_fsinfo = fsinfo,
4693 struct nfs4_get_lease_time_data data = {
4698 struct rpc_message msg = {
4699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4703 struct rpc_task_setup task_setup = {
4704 .rpc_client = clp->cl_rpcclient,
4705 .rpc_message = &msg,
4706 .callback_ops = &nfs4_get_lease_time_ops,
4707 .callback_data = &data
4711 dprintk("--> %s\n", __func__);
4712 task = rpc_run_task(&task_setup);
4715 status = PTR_ERR(task);
4717 status = task->tk_status;
4720 dprintk("<-- %s return %d\n", __func__, status);
4726 * Reset a slot table
4728 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4731 struct nfs4_slot *new = NULL;
4735 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4736 max_reqs, tbl->max_slots);
4738 /* Does the newly negotiated max_reqs match the existing slot table? */
4739 if (max_reqs != tbl->max_slots) {
4741 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4748 spin_lock(&tbl->slot_tbl_lock);
4751 tbl->max_slots = max_reqs;
4753 for (i = 0; i < tbl->max_slots; ++i)
4754 tbl->slots[i].seq_nr = ivalue;
4755 spin_unlock(&tbl->slot_tbl_lock);
4756 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4757 tbl, tbl->slots, tbl->max_slots);
4759 dprintk("<-- %s: return %d\n", __func__, ret);
4764 * Reset the forechannel and backchannel slot tables
4766 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4770 status = nfs4_reset_slot_table(&session->fc_slot_table,
4771 session->fc_attrs.max_reqs, 1);
4775 status = nfs4_reset_slot_table(&session->bc_slot_table,
4776 session->bc_attrs.max_reqs, 0);
4780 /* Destroy the slot table */
4781 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4783 if (session->fc_slot_table.slots != NULL) {
4784 kfree(session->fc_slot_table.slots);
4785 session->fc_slot_table.slots = NULL;
4787 if (session->bc_slot_table.slots != NULL) {
4788 kfree(session->bc_slot_table.slots);
4789 session->bc_slot_table.slots = NULL;
4795 * Initialize slot table
4797 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4798 int max_slots, int ivalue)
4800 struct nfs4_slot *slot;
4803 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4805 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4807 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4812 spin_lock(&tbl->slot_tbl_lock);
4813 tbl->max_slots = max_slots;
4815 tbl->highest_used_slotid = -1; /* no slot is currently used */
4816 spin_unlock(&tbl->slot_tbl_lock);
4817 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4818 tbl, tbl->slots, tbl->max_slots);
4820 dprintk("<-- %s: return %d\n", __func__, ret);
4825 * Initialize the forechannel and backchannel tables
4827 static int nfs4_init_slot_tables(struct nfs4_session *session)
4829 struct nfs4_slot_table *tbl;
4832 tbl = &session->fc_slot_table;
4833 if (tbl->slots == NULL) {
4834 status = nfs4_init_slot_table(tbl,
4835 session->fc_attrs.max_reqs, 1);
4840 tbl = &session->bc_slot_table;
4841 if (tbl->slots == NULL) {
4842 status = nfs4_init_slot_table(tbl,
4843 session->bc_attrs.max_reqs, 0);
4845 nfs4_destroy_slot_tables(session);
4851 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4853 struct nfs4_session *session;
4854 struct nfs4_slot_table *tbl;
4856 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4860 tbl = &session->fc_slot_table;
4861 tbl->highest_used_slotid = -1;
4862 spin_lock_init(&tbl->slot_tbl_lock);
4863 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4864 init_completion(&tbl->complete);
4866 tbl = &session->bc_slot_table;
4867 tbl->highest_used_slotid = -1;
4868 spin_lock_init(&tbl->slot_tbl_lock);
4869 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4870 init_completion(&tbl->complete);
4872 session->session_state = 1<<NFS4_SESSION_INITING;
4878 void nfs4_destroy_session(struct nfs4_session *session)
4880 nfs4_proc_destroy_session(session);
4881 dprintk("%s Destroy backchannel for xprt %p\n",
4882 __func__, session->clp->cl_rpcclient->cl_xprt);
4883 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4884 NFS41_BC_MIN_CALLBACKS);
4885 nfs4_destroy_slot_tables(session);
4890 * Initialize the values to be used by the client in CREATE_SESSION
4891 * If nfs4_init_session set the fore channel request and response sizes,
4894 * Set the back channel max_resp_sz_cached to zero to force the client to
4895 * always set csa_cachethis to FALSE because the current implementation
4896 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4898 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4900 struct nfs4_session *session = args->client->cl_session;
4901 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4902 mxresp_sz = session->fc_attrs.max_resp_sz;
4905 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4907 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4908 /* Fore channel attributes */
4909 args->fc_attrs.headerpadsz = 0;
4910 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4911 args->fc_attrs.max_resp_sz = mxresp_sz;
4912 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4913 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4915 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4916 "max_ops=%u max_reqs=%u\n",
4918 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4919 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4921 /* Back channel attributes */
4922 args->bc_attrs.headerpadsz = 0;
4923 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4924 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4925 args->bc_attrs.max_resp_sz_cached = 0;
4926 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4927 args->bc_attrs.max_reqs = 1;
4929 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4930 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4932 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4933 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4934 args->bc_attrs.max_reqs);
4937 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4939 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4940 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4942 if (rcvd->headerpadsz > sent->headerpadsz)
4944 if (rcvd->max_resp_sz > sent->max_resp_sz)
4947 * Our requested max_ops is the minimum we need; we're not
4948 * prepared to break up compounds into smaller pieces than that.
4949 * So, no point even trying to continue if the server won't
4952 if (rcvd->max_ops < sent->max_ops)
4954 if (rcvd->max_reqs == 0)
4959 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4961 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4962 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
4964 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4966 if (rcvd->max_resp_sz < sent->max_resp_sz)
4968 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4970 /* These would render the backchannel useless: */
4971 if (rcvd->max_ops == 0)
4973 if (rcvd->max_reqs == 0)
4978 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4979 struct nfs4_session *session)
4983 ret = nfs4_verify_fore_channel_attrs(args, session);
4986 return nfs4_verify_back_channel_attrs(args, session);
4989 static int _nfs4_proc_create_session(struct nfs_client *clp)
4991 struct nfs4_session *session = clp->cl_session;
4992 struct nfs41_create_session_args args = {
4994 .cb_program = NFS4_CALLBACK,
4996 struct nfs41_create_session_res res = {
4999 struct rpc_message msg = {
5000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5006 nfs4_init_channel_attrs(&args);
5007 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5009 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5012 /* Verify the session's negotiated channel_attrs values */
5013 status = nfs4_verify_channel_attrs(&args, session);
5015 /* Increment the clientid slot sequence id */
5023 * Issues a CREATE_SESSION operation to the server.
5024 * It is the responsibility of the caller to verify the session is
5025 * expired before calling this routine.
5027 int nfs4_proc_create_session(struct nfs_client *clp)
5031 struct nfs4_session *session = clp->cl_session;
5035 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5038 status = _nfs4_proc_create_session(clp);
5039 if (status == -NFS4ERR_DELAY) {
5040 err = nfs4_delay(clp->cl_rpcclient, &timeout);
5044 } while (status == -NFS4ERR_DELAY);
5049 /* Init and reset the fore channel */
5050 status = nfs4_init_slot_tables(session);
5051 dprintk("slot table initialization returned %d\n", status);
5054 status = nfs4_reset_slot_tables(session);
5055 dprintk("slot table reset returned %d\n", status);
5059 ptr = (unsigned *)&session->sess_id.data[0];
5060 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5061 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5063 dprintk("<-- %s\n", __func__);
5068 * Issue the over-the-wire RPC DESTROY_SESSION.
5069 * The caller must serialize access to this routine.
5071 int nfs4_proc_destroy_session(struct nfs4_session *session)
5074 struct rpc_message msg;
5076 dprintk("--> nfs4_proc_destroy_session\n");
5078 /* session is still being setup */
5079 if (session->clp->cl_cons_state != NFS_CS_READY)
5082 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5083 msg.rpc_argp = session;
5084 msg.rpc_resp = NULL;
5085 msg.rpc_cred = NULL;
5086 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5090 "Got error %d from the server on DESTROY_SESSION. "
5091 "Session has been destroyed regardless...\n", status);
5093 dprintk("<-- nfs4_proc_destroy_session\n");
5097 int nfs4_init_session(struct nfs_server *server)
5099 struct nfs_client *clp = server->nfs_client;
5100 struct nfs4_session *session;
5101 unsigned int rsize, wsize;
5104 if (!nfs4_has_session(clp))
5107 session = clp->cl_session;
5108 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5111 rsize = server->rsize;
5113 rsize = NFS_MAX_FILE_IO_SIZE;
5114 wsize = server->wsize;
5116 wsize = NFS_MAX_FILE_IO_SIZE;
5118 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5119 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5121 ret = nfs4_recover_expired_lease(server);
5123 ret = nfs4_check_client_ready(clp);
5128 * Renew the cl_session lease.
5130 struct nfs4_sequence_data {
5131 struct nfs_client *clp;
5132 struct nfs4_sequence_args args;
5133 struct nfs4_sequence_res res;
5136 static void nfs41_sequence_release(void *data)
5138 struct nfs4_sequence_data *calldata = data;
5139 struct nfs_client *clp = calldata->clp;
5141 if (atomic_read(&clp->cl_count) > 1)
5142 nfs4_schedule_state_renewal(clp);
5143 nfs_put_client(clp);
5147 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5149 switch(task->tk_status) {
5150 case -NFS4ERR_DELAY:
5151 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5154 nfs4_schedule_lease_recovery(clp);
5159 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5161 struct nfs4_sequence_data *calldata = data;
5162 struct nfs_client *clp = calldata->clp;
5164 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5167 if (task->tk_status < 0) {
5168 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5169 if (atomic_read(&clp->cl_count) == 1)
5172 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5173 rpc_restart_call_prepare(task);
5177 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5179 dprintk("<-- %s\n", __func__);
5182 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5184 struct nfs4_sequence_data *calldata = data;
5185 struct nfs_client *clp = calldata->clp;
5186 struct nfs4_sequence_args *args;
5187 struct nfs4_sequence_res *res;
5189 args = task->tk_msg.rpc_argp;
5190 res = task->tk_msg.rpc_resp;
5192 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5194 rpc_call_start(task);
5197 static const struct rpc_call_ops nfs41_sequence_ops = {
5198 .rpc_call_done = nfs41_sequence_call_done,
5199 .rpc_call_prepare = nfs41_sequence_prepare,
5200 .rpc_release = nfs41_sequence_release,
5203 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5205 struct nfs4_sequence_data *calldata;
5206 struct rpc_message msg = {
5207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5210 struct rpc_task_setup task_setup_data = {
5211 .rpc_client = clp->cl_rpcclient,
5212 .rpc_message = &msg,
5213 .callback_ops = &nfs41_sequence_ops,
5214 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5217 if (!atomic_inc_not_zero(&clp->cl_count))
5218 return ERR_PTR(-EIO);
5219 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5220 if (calldata == NULL) {
5221 nfs_put_client(clp);
5222 return ERR_PTR(-ENOMEM);
5224 msg.rpc_argp = &calldata->args;
5225 msg.rpc_resp = &calldata->res;
5226 calldata->clp = clp;
5227 task_setup_data.callback_data = calldata;
5229 return rpc_run_task(&task_setup_data);
5232 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5234 struct rpc_task *task;
5237 task = _nfs41_proc_sequence(clp, cred);
5239 ret = PTR_ERR(task);
5241 rpc_put_task_async(task);
5242 dprintk("<-- %s status=%d\n", __func__, ret);
5246 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5248 struct rpc_task *task;
5251 task = _nfs41_proc_sequence(clp, cred);
5253 ret = PTR_ERR(task);
5256 ret = rpc_wait_for_completion_task(task);
5258 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5260 if (task->tk_status == 0)
5261 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5262 ret = task->tk_status;
5266 dprintk("<-- %s status=%d\n", __func__, ret);
5270 struct nfs4_reclaim_complete_data {
5271 struct nfs_client *clp;
5272 struct nfs41_reclaim_complete_args arg;
5273 struct nfs41_reclaim_complete_res res;
5276 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5278 struct nfs4_reclaim_complete_data *calldata = data;
5280 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5281 if (nfs41_setup_sequence(calldata->clp->cl_session,
5282 &calldata->arg.seq_args,
5283 &calldata->res.seq_res, 0, task))
5286 rpc_call_start(task);
5289 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5291 switch(task->tk_status) {
5293 case -NFS4ERR_COMPLETE_ALREADY:
5294 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5296 case -NFS4ERR_DELAY:
5297 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5300 nfs4_schedule_lease_recovery(clp);
5305 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5307 struct nfs4_reclaim_complete_data *calldata = data;
5308 struct nfs_client *clp = calldata->clp;
5309 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5311 dprintk("--> %s\n", __func__);
5312 if (!nfs41_sequence_done(task, res))
5315 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5316 rpc_restart_call_prepare(task);
5319 dprintk("<-- %s\n", __func__);
5322 static void nfs4_free_reclaim_complete_data(void *data)
5324 struct nfs4_reclaim_complete_data *calldata = data;
5329 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5330 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5331 .rpc_call_done = nfs4_reclaim_complete_done,
5332 .rpc_release = nfs4_free_reclaim_complete_data,
5336 * Issue a global reclaim complete.
5338 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5340 struct nfs4_reclaim_complete_data *calldata;
5341 struct rpc_task *task;
5342 struct rpc_message msg = {
5343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5345 struct rpc_task_setup task_setup_data = {
5346 .rpc_client = clp->cl_rpcclient,
5347 .rpc_message = &msg,
5348 .callback_ops = &nfs4_reclaim_complete_call_ops,
5349 .flags = RPC_TASK_ASYNC,
5351 int status = -ENOMEM;
5353 dprintk("--> %s\n", __func__);
5354 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5355 if (calldata == NULL)
5357 calldata->clp = clp;
5358 calldata->arg.one_fs = 0;
5360 msg.rpc_argp = &calldata->arg;
5361 msg.rpc_resp = &calldata->res;
5362 task_setup_data.callback_data = calldata;
5363 task = rpc_run_task(&task_setup_data);
5365 status = PTR_ERR(task);
5368 status = nfs4_wait_for_completion_rpc_task(task);
5370 status = task->tk_status;
5374 dprintk("<-- %s status=%d\n", __func__, status);
5379 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5381 struct nfs4_layoutget *lgp = calldata;
5382 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5384 dprintk("--> %s\n", __func__);
5385 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5386 * right now covering the LAYOUTGET we are about to send.
5387 * However, that is not so catastrophic, and there seems
5388 * to be no way to prevent it completely.
5390 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5391 &lgp->res.seq_res, 0, task))
5393 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5394 NFS_I(lgp->args.inode)->layout,
5395 lgp->args.ctx->state)) {
5396 rpc_exit(task, NFS4_OK);
5399 rpc_call_start(task);
5402 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5404 struct nfs4_layoutget *lgp = calldata;
5405 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5407 dprintk("--> %s\n", __func__);
5409 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5412 switch (task->tk_status) {
5415 case -NFS4ERR_LAYOUTTRYLATER:
5416 case -NFS4ERR_RECALLCONFLICT:
5417 task->tk_status = -NFS4ERR_DELAY;
5420 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5421 rpc_restart_call_prepare(task);
5425 dprintk("<-- %s\n", __func__);
5428 static void nfs4_layoutget_release(void *calldata)
5430 struct nfs4_layoutget *lgp = calldata;
5432 dprintk("--> %s\n", __func__);
5433 if (lgp->res.layout.buf != NULL)
5434 free_page((unsigned long) lgp->res.layout.buf);
5435 put_nfs_open_context(lgp->args.ctx);
5437 dprintk("<-- %s\n", __func__);
5440 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5441 .rpc_call_prepare = nfs4_layoutget_prepare,
5442 .rpc_call_done = nfs4_layoutget_done,
5443 .rpc_release = nfs4_layoutget_release,
5446 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5448 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5449 struct rpc_task *task;
5450 struct rpc_message msg = {
5451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5452 .rpc_argp = &lgp->args,
5453 .rpc_resp = &lgp->res,
5455 struct rpc_task_setup task_setup_data = {
5456 .rpc_client = server->client,
5457 .rpc_message = &msg,
5458 .callback_ops = &nfs4_layoutget_call_ops,
5459 .callback_data = lgp,
5460 .flags = RPC_TASK_ASYNC,
5464 dprintk("--> %s\n", __func__);
5466 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5467 if (lgp->res.layout.buf == NULL) {
5468 nfs4_layoutget_release(lgp);
5472 lgp->res.seq_res.sr_slot = NULL;
5473 task = rpc_run_task(&task_setup_data);
5475 return PTR_ERR(task);
5476 status = nfs4_wait_for_completion_rpc_task(task);
5478 status = task->tk_status;
5480 status = pnfs_layout_process(lgp);
5482 dprintk("<-- %s status=%d\n", __func__, status);
5487 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5489 struct nfs4_getdeviceinfo_args args = {
5492 struct nfs4_getdeviceinfo_res res = {
5495 struct rpc_message msg = {
5496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5502 dprintk("--> %s\n", __func__);
5503 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5504 dprintk("<-- %s status=%d\n", __func__, status);
5509 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5511 struct nfs4_exception exception = { };
5515 err = nfs4_handle_exception(server,
5516 _nfs4_proc_getdeviceinfo(server, pdev),
5518 } while (exception.retry);
5521 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5523 #endif /* CONFIG_NFS_V4_1 */
5525 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5526 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5527 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5528 .recover_open = nfs4_open_reclaim,
5529 .recover_lock = nfs4_lock_reclaim,
5530 .establish_clid = nfs4_init_clientid,
5531 .get_clid_cred = nfs4_get_setclientid_cred,
5534 #if defined(CONFIG_NFS_V4_1)
5535 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5536 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5537 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5538 .recover_open = nfs4_open_reclaim,
5539 .recover_lock = nfs4_lock_reclaim,
5540 .establish_clid = nfs41_init_clientid,
5541 .get_clid_cred = nfs4_get_exchange_id_cred,
5542 .reclaim_complete = nfs41_proc_reclaim_complete,
5544 #endif /* CONFIG_NFS_V4_1 */
5546 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5547 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5548 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5549 .recover_open = nfs4_open_expired,
5550 .recover_lock = nfs4_lock_expired,
5551 .establish_clid = nfs4_init_clientid,
5552 .get_clid_cred = nfs4_get_setclientid_cred,
5555 #if defined(CONFIG_NFS_V4_1)
5556 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5557 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5558 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5559 .recover_open = nfs4_open_expired,
5560 .recover_lock = nfs4_lock_expired,
5561 .establish_clid = nfs41_init_clientid,
5562 .get_clid_cred = nfs4_get_exchange_id_cred,
5564 #endif /* CONFIG_NFS_V4_1 */
5566 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5567 .sched_state_renewal = nfs4_proc_async_renew,
5568 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5569 .renew_lease = nfs4_proc_renew,
5572 #if defined(CONFIG_NFS_V4_1)
5573 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5574 .sched_state_renewal = nfs41_proc_async_sequence,
5575 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5576 .renew_lease = nfs4_proc_sequence,
5580 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5582 .call_sync = _nfs4_call_sync,
5583 .validate_stateid = nfs4_validate_delegation_stateid,
5584 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5585 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5586 .state_renewal_ops = &nfs40_state_renewal_ops,
5589 #if defined(CONFIG_NFS_V4_1)
5590 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5592 .call_sync = _nfs4_call_sync_session,
5593 .validate_stateid = nfs41_validate_delegation_stateid,
5594 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5595 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5596 .state_renewal_ops = &nfs41_state_renewal_ops,
5600 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5601 [0] = &nfs_v4_0_minor_ops,
5602 #if defined(CONFIG_NFS_V4_1)
5603 [1] = &nfs_v4_1_minor_ops,
5607 static const struct inode_operations nfs4_file_inode_operations = {
5608 .permission = nfs_permission,
5609 .getattr = nfs_getattr,
5610 .setattr = nfs_setattr,
5611 .getxattr = generic_getxattr,
5612 .setxattr = generic_setxattr,
5613 .listxattr = generic_listxattr,
5614 .removexattr = generic_removexattr,
5617 const struct nfs_rpc_ops nfs_v4_clientops = {
5618 .version = 4, /* protocol version */
5619 .dentry_ops = &nfs4_dentry_operations,
5620 .dir_inode_ops = &nfs4_dir_inode_operations,
5621 .file_inode_ops = &nfs4_file_inode_operations,
5622 .getroot = nfs4_proc_get_root,
5623 .getattr = nfs4_proc_getattr,
5624 .setattr = nfs4_proc_setattr,
5625 .lookupfh = nfs4_proc_lookupfh,
5626 .lookup = nfs4_proc_lookup,
5627 .access = nfs4_proc_access,
5628 .readlink = nfs4_proc_readlink,
5629 .create = nfs4_proc_create,
5630 .remove = nfs4_proc_remove,
5631 .unlink_setup = nfs4_proc_unlink_setup,
5632 .unlink_done = nfs4_proc_unlink_done,
5633 .rename = nfs4_proc_rename,
5634 .rename_setup = nfs4_proc_rename_setup,
5635 .rename_done = nfs4_proc_rename_done,
5636 .link = nfs4_proc_link,
5637 .symlink = nfs4_proc_symlink,
5638 .mkdir = nfs4_proc_mkdir,
5639 .rmdir = nfs4_proc_remove,
5640 .readdir = nfs4_proc_readdir,
5641 .mknod = nfs4_proc_mknod,
5642 .statfs = nfs4_proc_statfs,
5643 .fsinfo = nfs4_proc_fsinfo,
5644 .pathconf = nfs4_proc_pathconf,
5645 .set_capabilities = nfs4_server_capabilities,
5646 .decode_dirent = nfs4_decode_dirent,
5647 .read_setup = nfs4_proc_read_setup,
5648 .read_done = nfs4_read_done,
5649 .write_setup = nfs4_proc_write_setup,
5650 .write_done = nfs4_write_done,
5651 .commit_setup = nfs4_proc_commit_setup,
5652 .commit_done = nfs4_commit_done,
5653 .lock = nfs4_proc_lock,
5654 .clear_acl_cache = nfs4_zap_acl_attr,
5655 .close_context = nfs4_close_context,
5656 .open_context = nfs4_atomic_open,
5659 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5660 .prefix = XATTR_NAME_NFSV4_ACL,
5661 .list = nfs4_xattr_list_nfs4_acl,
5662 .get = nfs4_xattr_get_nfs4_acl,
5663 .set = nfs4_xattr_set_nfs4_acl,
5666 const struct xattr_handler *nfs4_xattr_handlers[] = {
5667 &nfs4_xattr_nfs4_acl_handler,