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/sunrpc/clnt.h>
43 #include <linux/nfs.h>
44 #include <linux/nfs4.h>
45 #include <linux/nfs_fs.h>
46 #include <linux/nfs_page.h>
47 #include <linux/namei.h>
48 #include <linux/mount.h>
49 #include <linux/module.h>
50 #include <linux/sunrpc/bc_xprt.h>
53 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_PROC
60 #define NFS4_POLL_RETRY_MIN (HZ/10)
61 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 #define NFS4_MAX_LOOP_ON_RECOVER (10)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
68 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
69 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72 /* Prevent leaks of NFSv4 errors into userland */
73 static int nfs4_map_errors(int err)
78 case -NFS4ERR_RESOURCE:
81 dprintk("%s could not handle NFSv4 error %d\n",
89 * This is our standard bitmap for GETATTR requests.
91 const u32 nfs4_fattr_bitmap[2] = {
96 | FATTR4_WORD0_FILEID,
98 | FATTR4_WORD1_NUMLINKS
100 | FATTR4_WORD1_OWNER_GROUP
101 | FATTR4_WORD1_RAWDEV
102 | FATTR4_WORD1_SPACE_USED
103 | FATTR4_WORD1_TIME_ACCESS
104 | FATTR4_WORD1_TIME_METADATA
105 | FATTR4_WORD1_TIME_MODIFY
108 const u32 nfs4_statfs_bitmap[2] = {
109 FATTR4_WORD0_FILES_AVAIL
110 | FATTR4_WORD0_FILES_FREE
111 | FATTR4_WORD0_FILES_TOTAL,
112 FATTR4_WORD1_SPACE_AVAIL
113 | FATTR4_WORD1_SPACE_FREE
114 | FATTR4_WORD1_SPACE_TOTAL
117 const u32 nfs4_pathconf_bitmap[2] = {
119 | FATTR4_WORD0_MAXNAME,
123 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
124 | FATTR4_WORD0_MAXREAD
125 | FATTR4_WORD0_MAXWRITE
126 | FATTR4_WORD0_LEASE_TIME,
130 const u32 nfs4_fs_locations_bitmap[2] = {
132 | FATTR4_WORD0_CHANGE
135 | FATTR4_WORD0_FILEID
136 | FATTR4_WORD0_FS_LOCATIONS,
138 | FATTR4_WORD1_NUMLINKS
140 | FATTR4_WORD1_OWNER_GROUP
141 | FATTR4_WORD1_RAWDEV
142 | FATTR4_WORD1_SPACE_USED
143 | FATTR4_WORD1_TIME_ACCESS
144 | FATTR4_WORD1_TIME_METADATA
145 | FATTR4_WORD1_TIME_MODIFY
146 | FATTR4_WORD1_MOUNTED_ON_FILEID
149 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
150 struct nfs4_readdir_arg *readdir)
154 BUG_ON(readdir->count < 80);
156 readdir->cookie = cookie;
157 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
162 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
167 * NFSv4 servers do not return entries for '.' and '..'
168 * Therefore, we fake these entries here. We let '.'
169 * have cookie 0 and '..' have cookie 1. Note that
170 * when talking to the server, we always send cookie 0
173 start = p = kmap_atomic(*readdir->pages, KM_USER0);
176 *p++ = xdr_one; /* next */
177 *p++ = xdr_zero; /* cookie, first word */
178 *p++ = xdr_one; /* cookie, second word */
179 *p++ = xdr_one; /* entry len */
180 memcpy(p, ".\0\0\0", 4); /* entry */
182 *p++ = xdr_one; /* bitmap length */
183 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
184 *p++ = htonl(8); /* attribute buffer length */
185 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
188 *p++ = xdr_one; /* next */
189 *p++ = xdr_zero; /* cookie, first word */
190 *p++ = xdr_two; /* cookie, second word */
191 *p++ = xdr_two; /* entry len */
192 memcpy(p, "..\0\0", 4); /* entry */
194 *p++ = xdr_one; /* bitmap length */
195 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
196 *p++ = htonl(8); /* attribute buffer length */
197 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
199 readdir->pgbase = (char *)p - (char *)start;
200 readdir->count -= readdir->pgbase;
201 kunmap_atomic(start, KM_USER0);
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs_wait_bit_killable, TASK_KILLABLE);
215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
241 exception->retry = 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
257 exception->retry = 1;
258 #if !defined(CONFIG_NFS_V4_1)
260 #else /* !defined(CONFIG_NFS_V4_1) */
261 if (!nfs4_has_session(server->nfs_client))
264 case -NFS4ERR_BADSESSION:
265 case -NFS4ERR_BADSLOT:
266 case -NFS4ERR_BAD_HIGH_SLOT:
267 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
268 case -NFS4ERR_DEADSESSION:
269 case -NFS4ERR_SEQ_FALSE_RETRY:
270 case -NFS4ERR_SEQ_MISORDERED:
271 dprintk("%s ERROR: %d Reset session\n", __func__,
273 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
274 exception->retry = 1;
276 #endif /* !defined(CONFIG_NFS_V4_1) */
277 case -NFS4ERR_FILE_OPEN:
278 if (exception->timeout > HZ) {
279 /* We have retried a decent amount, time to
287 ret = nfs4_delay(server->client, &exception->timeout);
290 case -NFS4ERR_OLD_STATEID:
291 exception->retry = 1;
293 /* We failed to handle the error */
294 return nfs4_map_errors(ret);
298 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
300 struct nfs_client *clp = server->nfs_client;
301 spin_lock(&clp->cl_lock);
302 if (time_before(clp->cl_last_renewal,timestamp))
303 clp->cl_last_renewal = timestamp;
304 spin_unlock(&clp->cl_lock);
307 #if defined(CONFIG_NFS_V4_1)
310 * nfs4_free_slot - free a slot and efficiently update slot table.
312 * freeing a slot is trivially done by clearing its respective bit
314 * If the freed slotid equals highest_used_slotid we want to update it
315 * so that the server would be able to size down the slot table if needed,
316 * otherwise we know that the highest_used_slotid is still in use.
317 * When updating highest_used_slotid there may be "holes" in the bitmap
318 * so we need to scan down from highest_used_slotid to 0 looking for the now
319 * highest slotid in use.
320 * If none found, highest_used_slotid is set to -1.
323 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
325 int slotid = free_slotid;
327 spin_lock(&tbl->slot_tbl_lock);
328 /* clear used bit in bitmap */
329 __clear_bit(slotid, tbl->used_slots);
331 /* update highest_used_slotid when it is freed */
332 if (slotid == tbl->highest_used_slotid) {
333 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
334 if (slotid >= 0 && slotid < tbl->max_slots)
335 tbl->highest_used_slotid = slotid;
337 tbl->highest_used_slotid = -1;
339 rpc_wake_up_next(&tbl->slot_tbl_waitq);
340 spin_unlock(&tbl->slot_tbl_lock);
341 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
342 free_slotid, tbl->highest_used_slotid);
345 void nfs41_sequence_free_slot(const struct nfs_client *clp,
346 struct nfs4_sequence_res *res)
348 struct nfs4_slot_table *tbl;
350 if (!nfs4_has_session(clp)) {
351 dprintk("%s: No session\n", __func__);
354 tbl = &clp->cl_session->fc_slot_table;
355 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
356 dprintk("%s: No slot\n", __func__);
357 /* just wake up the next guy waiting since
358 * we may have not consumed a slot after all */
359 rpc_wake_up_next(&tbl->slot_tbl_waitq);
362 nfs4_free_slot(tbl, res->sr_slotid);
363 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
366 static void nfs41_sequence_done(struct nfs_client *clp,
367 struct nfs4_sequence_res *res,
370 unsigned long timestamp;
371 struct nfs4_slot_table *tbl;
372 struct nfs4_slot *slot;
375 * sr_status remains 1 if an RPC level error occurred. The server
376 * may or may not have processed the sequence operation..
377 * Proceed as if the server received and processed the sequence
380 if (res->sr_status == 1)
381 res->sr_status = NFS_OK;
383 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
384 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
387 tbl = &clp->cl_session->fc_slot_table;
388 slot = tbl->slots + res->sr_slotid;
390 if (res->sr_status == 0) {
391 /* Update the slot's sequence and clientid lease timer */
393 timestamp = res->sr_renewal_time;
394 spin_lock(&clp->cl_lock);
395 if (time_before(clp->cl_last_renewal, timestamp))
396 clp->cl_last_renewal = timestamp;
397 spin_unlock(&clp->cl_lock);
401 /* The session may be reset by one of the error handlers. */
402 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
403 nfs41_sequence_free_slot(clp, res);
407 * nfs4_find_slot - efficiently look for a free slot
409 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
410 * If found, we mark the slot as used, update the highest_used_slotid,
411 * and respectively set up the sequence operation args.
412 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
414 * Note: must be called with under the slot_tbl_lock.
417 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
420 u8 ret_id = NFS4_MAX_SLOT_TABLE;
421 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
423 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
424 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
426 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
427 if (slotid >= tbl->max_slots)
429 __set_bit(slotid, tbl->used_slots);
430 if (slotid > tbl->highest_used_slotid)
431 tbl->highest_used_slotid = slotid;
434 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
435 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
439 static int nfs4_recover_session(struct nfs4_session *session)
441 struct nfs_client *clp = session->clp;
445 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
446 ret = nfs4_wait_clnt_recover(clp);
449 if (!test_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state))
451 nfs4_schedule_state_manager(clp);
457 static int nfs41_setup_sequence(struct nfs4_session *session,
458 struct nfs4_sequence_args *args,
459 struct nfs4_sequence_res *res,
461 struct rpc_task *task)
463 struct nfs4_slot *slot;
464 struct nfs4_slot_table *tbl;
468 dprintk("--> %s\n", __func__);
469 /* slot already allocated? */
470 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
473 memset(res, 0, sizeof(*res));
474 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
475 tbl = &session->fc_slot_table;
477 spin_lock(&tbl->slot_tbl_lock);
478 if (test_bit(NFS4CLNT_SESSION_RESET, &session->clp->cl_state)) {
479 if (tbl->highest_used_slotid != -1) {
480 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
481 spin_unlock(&tbl->slot_tbl_lock);
482 dprintk("<-- %s: Session reset: draining\n", __func__);
486 /* The slot table is empty; start the reset thread */
487 dprintk("%s Session Reset\n", __func__);
488 spin_unlock(&tbl->slot_tbl_lock);
489 status = nfs4_recover_session(session);
492 spin_lock(&tbl->slot_tbl_lock);
495 slotid = nfs4_find_slot(tbl, task);
496 if (slotid == NFS4_MAX_SLOT_TABLE) {
497 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
498 spin_unlock(&tbl->slot_tbl_lock);
499 dprintk("<-- %s: no free slots\n", __func__);
502 spin_unlock(&tbl->slot_tbl_lock);
504 slot = tbl->slots + slotid;
505 args->sa_session = session;
506 args->sa_slotid = slotid;
507 args->sa_cache_this = cache_reply;
509 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
511 res->sr_session = session;
512 res->sr_slotid = slotid;
513 res->sr_renewal_time = jiffies;
515 * sr_status is only set in decode_sequence, and so will remain
516 * set to 1 if an rpc level failure occurs.
522 int nfs4_setup_sequence(struct nfs_client *clp,
523 struct nfs4_sequence_args *args,
524 struct nfs4_sequence_res *res,
526 struct rpc_task *task)
530 dprintk("--> %s clp %p session %p sr_slotid %d\n",
531 __func__, clp, clp->cl_session, res->sr_slotid);
533 if (!nfs4_has_session(clp))
535 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
537 if (ret != -EAGAIN) {
538 /* terminate rpc task */
539 task->tk_status = ret;
540 task->tk_action = NULL;
543 dprintk("<-- %s status=%d\n", __func__, ret);
547 struct nfs41_call_sync_data {
548 struct nfs_client *clp;
549 struct nfs4_sequence_args *seq_args;
550 struct nfs4_sequence_res *seq_res;
554 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
556 struct nfs41_call_sync_data *data = calldata;
558 dprintk("--> %s data->clp->cl_session %p\n", __func__,
559 data->clp->cl_session);
560 if (nfs4_setup_sequence(data->clp, data->seq_args,
561 data->seq_res, data->cache_reply, task))
563 rpc_call_start(task);
566 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
568 struct nfs41_call_sync_data *data = calldata;
570 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
571 nfs41_sequence_free_slot(data->clp, data->seq_res);
574 struct rpc_call_ops nfs41_call_sync_ops = {
575 .rpc_call_prepare = nfs41_call_sync_prepare,
576 .rpc_call_done = nfs41_call_sync_done,
579 static int nfs4_call_sync_sequence(struct nfs_client *clp,
580 struct rpc_clnt *clnt,
581 struct rpc_message *msg,
582 struct nfs4_sequence_args *args,
583 struct nfs4_sequence_res *res,
587 struct rpc_task *task;
588 struct nfs41_call_sync_data data = {
592 .cache_reply = cache_reply,
594 struct rpc_task_setup task_setup = {
597 .callback_ops = &nfs41_call_sync_ops,
598 .callback_data = &data
601 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
602 task = rpc_run_task(&task_setup);
606 ret = task->tk_status;
612 int _nfs4_call_sync_session(struct nfs_server *server,
613 struct rpc_message *msg,
614 struct nfs4_sequence_args *args,
615 struct nfs4_sequence_res *res,
618 return nfs4_call_sync_sequence(server->nfs_client, server->client,
619 msg, args, res, cache_reply);
622 #endif /* CONFIG_NFS_V4_1 */
624 int _nfs4_call_sync(struct nfs_server *server,
625 struct rpc_message *msg,
626 struct nfs4_sequence_args *args,
627 struct nfs4_sequence_res *res,
630 args->sa_session = res->sr_session = NULL;
631 return rpc_call_sync(server->client, msg, 0);
634 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
635 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
636 &(res)->seq_res, (cache_reply))
638 static void nfs4_sequence_done(const struct nfs_server *server,
639 struct nfs4_sequence_res *res, int rpc_status)
641 #ifdef CONFIG_NFS_V4_1
642 if (nfs4_has_session(server->nfs_client))
643 nfs41_sequence_done(server->nfs_client, res, rpc_status);
644 #endif /* CONFIG_NFS_V4_1 */
647 void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp,
648 struct nfs4_sequence_res *res)
650 #ifdef CONFIG_NFS_V4_1
651 if (nfs4_has_session(clp)) {
652 nfs41_sequence_free_slot(clp, res);
653 rpc_restart_call_prepare(task);
656 #endif /* CONFIG_NFS_V4_1 */
657 rpc_restart_call(task);
660 /* no restart, therefore free slot here */
661 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
662 struct nfs4_sequence_res *res,
665 nfs4_sequence_done(server, res, rpc_status);
666 nfs4_sequence_free_slot(server->nfs_client, res);
669 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
671 struct nfs_inode *nfsi = NFS_I(dir);
673 spin_lock(&dir->i_lock);
674 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
675 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
676 nfs_force_lookup_revalidate(dir);
677 nfsi->change_attr = cinfo->after;
678 spin_unlock(&dir->i_lock);
681 struct nfs4_opendata {
683 struct nfs_openargs o_arg;
684 struct nfs_openres o_res;
685 struct nfs_open_confirmargs c_arg;
686 struct nfs_open_confirmres c_res;
687 struct nfs_fattr f_attr;
688 struct nfs_fattr dir_attr;
691 struct nfs4_state_owner *owner;
692 struct nfs4_state *state;
694 unsigned long timestamp;
695 unsigned int rpc_done : 1;
701 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
703 p->o_res.f_attr = &p->f_attr;
704 p->o_res.dir_attr = &p->dir_attr;
705 p->o_res.seqid = p->o_arg.seqid;
706 p->c_res.seqid = p->c_arg.seqid;
707 p->o_res.server = p->o_arg.server;
708 nfs_fattr_init(&p->f_attr);
709 nfs_fattr_init(&p->dir_attr);
710 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
713 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
714 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
715 const struct iattr *attrs)
717 struct dentry *parent = dget_parent(path->dentry);
718 struct inode *dir = parent->d_inode;
719 struct nfs_server *server = NFS_SERVER(dir);
720 struct nfs4_opendata *p;
722 p = kzalloc(sizeof(*p), GFP_KERNEL);
725 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
726 if (p->o_arg.seqid == NULL)
728 p->path.mnt = mntget(path->mnt);
729 p->path.dentry = dget(path->dentry);
732 atomic_inc(&sp->so_count);
733 p->o_arg.fh = NFS_FH(dir);
734 p->o_arg.open_flags = flags;
735 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
736 p->o_arg.clientid = server->nfs_client->cl_clientid;
737 p->o_arg.id = sp->so_owner_id.id;
738 p->o_arg.name = &p->path.dentry->d_name;
739 p->o_arg.server = server;
740 p->o_arg.bitmask = server->attr_bitmask;
741 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
742 if (flags & O_EXCL) {
743 u32 *s = (u32 *) p->o_arg.u.verifier.data;
746 } else if (flags & O_CREAT) {
747 p->o_arg.u.attrs = &p->attrs;
748 memcpy(&p->attrs, attrs, sizeof(p->attrs));
750 p->c_arg.fh = &p->o_res.fh;
751 p->c_arg.stateid = &p->o_res.stateid;
752 p->c_arg.seqid = p->o_arg.seqid;
753 nfs4_init_opendata_res(p);
763 static void nfs4_opendata_free(struct kref *kref)
765 struct nfs4_opendata *p = container_of(kref,
766 struct nfs4_opendata, kref);
768 nfs_free_seqid(p->o_arg.seqid);
769 if (p->state != NULL)
770 nfs4_put_open_state(p->state);
771 nfs4_put_state_owner(p->owner);
777 static void nfs4_opendata_put(struct nfs4_opendata *p)
780 kref_put(&p->kref, nfs4_opendata_free);
783 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
787 ret = rpc_wait_for_completion_task(task);
791 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
795 if (open_mode & O_EXCL)
797 switch (mode & (FMODE_READ|FMODE_WRITE)) {
799 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
802 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
804 case FMODE_READ|FMODE_WRITE:
805 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
811 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
813 if ((delegation->type & fmode) != fmode)
815 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
817 nfs_mark_delegation_referenced(delegation);
821 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
830 case FMODE_READ|FMODE_WRITE:
833 nfs4_state_set_mode_locked(state, state->state | fmode);
836 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
838 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
839 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
840 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
843 set_bit(NFS_O_RDONLY_STATE, &state->flags);
846 set_bit(NFS_O_WRONLY_STATE, &state->flags);
848 case FMODE_READ|FMODE_WRITE:
849 set_bit(NFS_O_RDWR_STATE, &state->flags);
853 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
855 write_seqlock(&state->seqlock);
856 nfs_set_open_stateid_locked(state, stateid, fmode);
857 write_sequnlock(&state->seqlock);
860 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
863 * Protect the call to nfs4_state_set_mode_locked and
864 * serialise the stateid update
866 write_seqlock(&state->seqlock);
867 if (deleg_stateid != NULL) {
868 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
869 set_bit(NFS_DELEGATED_STATE, &state->flags);
871 if (open_stateid != NULL)
872 nfs_set_open_stateid_locked(state, open_stateid, fmode);
873 write_sequnlock(&state->seqlock);
874 spin_lock(&state->owner->so_lock);
875 update_open_stateflags(state, fmode);
876 spin_unlock(&state->owner->so_lock);
879 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
881 struct nfs_inode *nfsi = NFS_I(state->inode);
882 struct nfs_delegation *deleg_cur;
885 fmode &= (FMODE_READ|FMODE_WRITE);
888 deleg_cur = rcu_dereference(nfsi->delegation);
889 if (deleg_cur == NULL)
892 spin_lock(&deleg_cur->lock);
893 if (nfsi->delegation != deleg_cur ||
894 (deleg_cur->type & fmode) != fmode)
895 goto no_delegation_unlock;
897 if (delegation == NULL)
898 delegation = &deleg_cur->stateid;
899 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
900 goto no_delegation_unlock;
902 nfs_mark_delegation_referenced(deleg_cur);
903 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
905 no_delegation_unlock:
906 spin_unlock(&deleg_cur->lock);
910 if (!ret && open_stateid != NULL) {
911 __update_open_stateid(state, open_stateid, NULL, fmode);
919 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
921 struct nfs_delegation *delegation;
924 delegation = rcu_dereference(NFS_I(inode)->delegation);
925 if (delegation == NULL || (delegation->type & fmode) == fmode) {
930 nfs_inode_return_delegation(inode);
933 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
935 struct nfs4_state *state = opendata->state;
936 struct nfs_inode *nfsi = NFS_I(state->inode);
937 struct nfs_delegation *delegation;
938 int open_mode = opendata->o_arg.open_flags & O_EXCL;
939 fmode_t fmode = opendata->o_arg.fmode;
940 nfs4_stateid stateid;
944 if (can_open_cached(state, fmode, open_mode)) {
945 spin_lock(&state->owner->so_lock);
946 if (can_open_cached(state, fmode, open_mode)) {
947 update_open_stateflags(state, fmode);
948 spin_unlock(&state->owner->so_lock);
949 goto out_return_state;
951 spin_unlock(&state->owner->so_lock);
954 delegation = rcu_dereference(nfsi->delegation);
955 if (delegation == NULL ||
956 !can_open_delegated(delegation, fmode)) {
960 /* Save the delegation */
961 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
963 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
968 /* Try to update the stateid using the delegation */
969 if (update_open_stateid(state, NULL, &stateid, fmode))
970 goto out_return_state;
975 atomic_inc(&state->count);
979 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
982 struct nfs4_state *state = NULL;
983 struct nfs_delegation *delegation;
986 if (!data->rpc_done) {
987 state = nfs4_try_open_cached(data);
992 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
994 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
995 ret = PTR_ERR(inode);
999 state = nfs4_get_open_state(inode, data->owner);
1002 if (data->o_res.delegation_type != 0) {
1003 int delegation_flags = 0;
1006 delegation = rcu_dereference(NFS_I(inode)->delegation);
1008 delegation_flags = delegation->flags;
1010 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1011 nfs_inode_set_delegation(state->inode,
1012 data->owner->so_cred,
1015 nfs_inode_reclaim_delegation(state->inode,
1016 data->owner->so_cred,
1020 update_open_stateid(state, &data->o_res.stateid, NULL,
1028 return ERR_PTR(ret);
1031 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1033 struct nfs_inode *nfsi = NFS_I(state->inode);
1034 struct nfs_open_context *ctx;
1036 spin_lock(&state->inode->i_lock);
1037 list_for_each_entry(ctx, &nfsi->open_files, list) {
1038 if (ctx->state != state)
1040 get_nfs_open_context(ctx);
1041 spin_unlock(&state->inode->i_lock);
1044 spin_unlock(&state->inode->i_lock);
1045 return ERR_PTR(-ENOENT);
1048 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1050 struct nfs4_opendata *opendata;
1052 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1053 if (opendata == NULL)
1054 return ERR_PTR(-ENOMEM);
1055 opendata->state = state;
1056 atomic_inc(&state->count);
1060 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1062 struct nfs4_state *newstate;
1065 opendata->o_arg.open_flags = 0;
1066 opendata->o_arg.fmode = fmode;
1067 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1068 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1069 nfs4_init_opendata_res(opendata);
1070 ret = _nfs4_proc_open(opendata);
1073 newstate = nfs4_opendata_to_nfs4_state(opendata);
1074 if (IS_ERR(newstate))
1075 return PTR_ERR(newstate);
1076 nfs4_close_state(&opendata->path, newstate, fmode);
1081 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1083 struct nfs4_state *newstate;
1086 /* memory barrier prior to reading state->n_* */
1087 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1089 if (state->n_rdwr != 0) {
1090 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1093 if (newstate != state)
1096 if (state->n_wronly != 0) {
1097 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1100 if (newstate != state)
1103 if (state->n_rdonly != 0) {
1104 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1107 if (newstate != state)
1111 * We may have performed cached opens for all three recoveries.
1112 * Check if we need to update the current stateid.
1114 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1115 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1116 write_seqlock(&state->seqlock);
1117 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1118 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1119 write_sequnlock(&state->seqlock);
1126 * reclaim state on the server after a reboot.
1128 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1130 struct nfs_delegation *delegation;
1131 struct nfs4_opendata *opendata;
1132 fmode_t delegation_type = 0;
1135 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1136 if (IS_ERR(opendata))
1137 return PTR_ERR(opendata);
1138 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1139 opendata->o_arg.fh = NFS_FH(state->inode);
1141 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1142 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1143 delegation_type = delegation->type;
1145 opendata->o_arg.u.delegation_type = delegation_type;
1146 status = nfs4_open_recover(opendata, state);
1147 nfs4_opendata_put(opendata);
1151 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1153 struct nfs_server *server = NFS_SERVER(state->inode);
1154 struct nfs4_exception exception = { };
1157 err = _nfs4_do_open_reclaim(ctx, state);
1158 if (err != -NFS4ERR_DELAY)
1160 nfs4_handle_exception(server, err, &exception);
1161 } while (exception.retry);
1165 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1167 struct nfs_open_context *ctx;
1170 ctx = nfs4_state_find_open_context(state);
1172 return PTR_ERR(ctx);
1173 ret = nfs4_do_open_reclaim(ctx, state);
1174 put_nfs_open_context(ctx);
1178 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1180 struct nfs4_opendata *opendata;
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_DELEGATE_CUR;
1187 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1188 sizeof(opendata->o_arg.u.delegation.data));
1189 ret = nfs4_open_recover(opendata, state);
1190 nfs4_opendata_put(opendata);
1194 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1196 struct nfs4_exception exception = { };
1197 struct nfs_server *server = NFS_SERVER(state->inode);
1200 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1206 case -NFS4ERR_STALE_CLIENTID:
1207 case -NFS4ERR_STALE_STATEID:
1208 case -NFS4ERR_EXPIRED:
1209 /* Don't recall a delegation if it was lost */
1210 nfs4_schedule_state_recovery(server->nfs_client);
1214 * The show must go on: exit, but mark the
1215 * stateid as needing recovery.
1217 case -NFS4ERR_ADMIN_REVOKED:
1218 case -NFS4ERR_BAD_STATEID:
1219 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1224 err = nfs4_handle_exception(server, err, &exception);
1225 } while (exception.retry);
1230 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1232 struct nfs4_opendata *data = calldata;
1234 data->rpc_status = task->tk_status;
1235 if (RPC_ASSASSINATED(task))
1237 if (data->rpc_status == 0) {
1238 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1239 sizeof(data->o_res.stateid.data));
1240 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1241 renew_lease(data->o_res.server, data->timestamp);
1246 static void nfs4_open_confirm_release(void *calldata)
1248 struct nfs4_opendata *data = calldata;
1249 struct nfs4_state *state = NULL;
1251 /* If this request hasn't been cancelled, do nothing */
1252 if (data->cancelled == 0)
1254 /* In case of error, no cleanup! */
1255 if (!data->rpc_done)
1257 state = nfs4_opendata_to_nfs4_state(data);
1259 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1261 nfs4_opendata_put(data);
1264 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1265 .rpc_call_done = nfs4_open_confirm_done,
1266 .rpc_release = nfs4_open_confirm_release,
1270 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1272 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1274 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1275 struct rpc_task *task;
1276 struct rpc_message msg = {
1277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1278 .rpc_argp = &data->c_arg,
1279 .rpc_resp = &data->c_res,
1280 .rpc_cred = data->owner->so_cred,
1282 struct rpc_task_setup task_setup_data = {
1283 .rpc_client = server->client,
1284 .rpc_message = &msg,
1285 .callback_ops = &nfs4_open_confirm_ops,
1286 .callback_data = data,
1287 .workqueue = nfsiod_workqueue,
1288 .flags = RPC_TASK_ASYNC,
1292 kref_get(&data->kref);
1294 data->rpc_status = 0;
1295 data->timestamp = jiffies;
1296 task = rpc_run_task(&task_setup_data);
1298 return PTR_ERR(task);
1299 status = nfs4_wait_for_completion_rpc_task(task);
1301 data->cancelled = 1;
1304 status = data->rpc_status;
1309 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1311 struct nfs4_opendata *data = calldata;
1312 struct nfs4_state_owner *sp = data->owner;
1314 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1317 * Check if we still need to send an OPEN call, or if we can use
1318 * a delegation instead.
1320 if (data->state != NULL) {
1321 struct nfs_delegation *delegation;
1323 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1326 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1327 if (delegation != NULL &&
1328 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1334 /* Update sequence id. */
1335 data->o_arg.id = sp->so_owner_id.id;
1336 data->o_arg.clientid = sp->so_client->cl_clientid;
1337 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1338 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1339 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1341 data->timestamp = jiffies;
1342 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1343 &data->o_arg.seq_args,
1344 &data->o_res.seq_res, 1, task))
1346 rpc_call_start(task);
1349 task->tk_action = NULL;
1353 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1355 struct nfs4_opendata *data = calldata;
1357 data->rpc_status = task->tk_status;
1359 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1362 if (RPC_ASSASSINATED(task))
1364 if (task->tk_status == 0) {
1365 switch (data->o_res.f_attr->mode & S_IFMT) {
1369 data->rpc_status = -ELOOP;
1372 data->rpc_status = -EISDIR;
1375 data->rpc_status = -ENOTDIR;
1377 renew_lease(data->o_res.server, data->timestamp);
1378 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1379 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1384 static void nfs4_open_release(void *calldata)
1386 struct nfs4_opendata *data = calldata;
1387 struct nfs4_state *state = NULL;
1389 /* If this request hasn't been cancelled, do nothing */
1390 if (data->cancelled == 0)
1392 /* In case of error, no cleanup! */
1393 if (data->rpc_status != 0 || !data->rpc_done)
1395 /* In case we need an open_confirm, no cleanup! */
1396 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1398 state = nfs4_opendata_to_nfs4_state(data);
1400 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1402 nfs4_opendata_put(data);
1405 static const struct rpc_call_ops nfs4_open_ops = {
1406 .rpc_call_prepare = nfs4_open_prepare,
1407 .rpc_call_done = nfs4_open_done,
1408 .rpc_release = nfs4_open_release,
1412 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1414 static int _nfs4_proc_open(struct nfs4_opendata *data)
1416 struct inode *dir = data->dir->d_inode;
1417 struct nfs_server *server = NFS_SERVER(dir);
1418 struct nfs_openargs *o_arg = &data->o_arg;
1419 struct nfs_openres *o_res = &data->o_res;
1420 struct rpc_task *task;
1421 struct rpc_message msg = {
1422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1425 .rpc_cred = data->owner->so_cred,
1427 struct rpc_task_setup task_setup_data = {
1428 .rpc_client = server->client,
1429 .rpc_message = &msg,
1430 .callback_ops = &nfs4_open_ops,
1431 .callback_data = data,
1432 .workqueue = nfsiod_workqueue,
1433 .flags = RPC_TASK_ASYNC,
1437 kref_get(&data->kref);
1439 data->rpc_status = 0;
1440 data->cancelled = 0;
1441 task = rpc_run_task(&task_setup_data);
1443 return PTR_ERR(task);
1444 status = nfs4_wait_for_completion_rpc_task(task);
1446 data->cancelled = 1;
1449 status = data->rpc_status;
1451 if (status != 0 || !data->rpc_done)
1454 if (o_res->fh.size == 0)
1455 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1457 if (o_arg->open_flags & O_CREAT) {
1458 update_changeattr(dir, &o_res->cinfo);
1459 nfs_post_op_update_inode(dir, o_res->dir_attr);
1461 nfs_refresh_inode(dir, o_res->dir_attr);
1462 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1463 status = _nfs4_proc_open_confirm(data);
1467 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1468 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1472 static int nfs4_recover_expired_lease(struct nfs_server *server)
1474 struct nfs_client *clp = server->nfs_client;
1478 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1479 ret = nfs4_wait_clnt_recover(clp);
1482 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1483 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1485 nfs4_schedule_state_recovery(clp);
1493 * reclaim state on the server after a network partition.
1494 * Assumes caller holds the appropriate lock
1496 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1498 struct nfs4_opendata *opendata;
1501 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1502 if (IS_ERR(opendata))
1503 return PTR_ERR(opendata);
1504 ret = nfs4_open_recover(opendata, state);
1506 d_drop(ctx->path.dentry);
1507 nfs4_opendata_put(opendata);
1511 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1513 struct nfs_server *server = NFS_SERVER(state->inode);
1514 struct nfs4_exception exception = { };
1518 err = _nfs4_open_expired(ctx, state);
1522 case -NFS4ERR_GRACE:
1523 case -NFS4ERR_DELAY:
1524 nfs4_handle_exception(server, err, &exception);
1527 } while (exception.retry);
1532 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1534 struct nfs_open_context *ctx;
1537 ctx = nfs4_state_find_open_context(state);
1539 return PTR_ERR(ctx);
1540 ret = nfs4_do_open_expired(ctx, state);
1541 put_nfs_open_context(ctx);
1546 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1547 * fields corresponding to attributes that were used to store the verifier.
1548 * Make sure we clobber those fields in the later setattr call
1550 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1552 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1553 !(sattr->ia_valid & ATTR_ATIME_SET))
1554 sattr->ia_valid |= ATTR_ATIME;
1556 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1557 !(sattr->ia_valid & ATTR_MTIME_SET))
1558 sattr->ia_valid |= ATTR_MTIME;
1562 * Returns a referenced nfs4_state
1564 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)
1566 struct nfs4_state_owner *sp;
1567 struct nfs4_state *state = NULL;
1568 struct nfs_server *server = NFS_SERVER(dir);
1569 struct nfs4_opendata *opendata;
1572 /* Protect against reboot recovery conflicts */
1574 if (!(sp = nfs4_get_state_owner(server, cred))) {
1575 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1578 status = nfs4_recover_expired_lease(server);
1580 goto err_put_state_owner;
1581 if (path->dentry->d_inode != NULL)
1582 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1584 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1585 if (opendata == NULL)
1586 goto err_put_state_owner;
1588 if (path->dentry->d_inode != NULL)
1589 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1591 status = _nfs4_proc_open(opendata);
1593 goto err_opendata_put;
1595 if (opendata->o_arg.open_flags & O_EXCL)
1596 nfs4_exclusive_attrset(opendata, sattr);
1598 state = nfs4_opendata_to_nfs4_state(opendata);
1599 status = PTR_ERR(state);
1601 goto err_opendata_put;
1602 nfs4_opendata_put(opendata);
1603 nfs4_put_state_owner(sp);
1607 nfs4_opendata_put(opendata);
1608 err_put_state_owner:
1609 nfs4_put_state_owner(sp);
1616 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)
1618 struct nfs4_exception exception = { };
1619 struct nfs4_state *res;
1623 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1626 /* NOTE: BAD_SEQID means the server and client disagree about the
1627 * book-keeping w.r.t. state-changing operations
1628 * (OPEN/CLOSE/LOCK/LOCKU...)
1629 * It is actually a sign of a bug on the client or on the server.
1631 * If we receive a BAD_SEQID error in the particular case of
1632 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1633 * have unhashed the old state_owner for us, and that we can
1634 * therefore safely retry using a new one. We should still warn
1635 * the user though...
1637 if (status == -NFS4ERR_BAD_SEQID) {
1638 printk(KERN_WARNING "NFS: v4 server %s "
1639 " returned a bad sequence-id error!\n",
1640 NFS_SERVER(dir)->nfs_client->cl_hostname);
1641 exception.retry = 1;
1645 * BAD_STATEID on OPEN means that the server cancelled our
1646 * state before it received the OPEN_CONFIRM.
1647 * Recover by retrying the request as per the discussion
1648 * on Page 181 of RFC3530.
1650 if (status == -NFS4ERR_BAD_STATEID) {
1651 exception.retry = 1;
1654 if (status == -EAGAIN) {
1655 /* We must have found a delegation */
1656 exception.retry = 1;
1659 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1660 status, &exception));
1661 } while (exception.retry);
1665 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1666 struct nfs_fattr *fattr, struct iattr *sattr,
1667 struct nfs4_state *state)
1669 struct nfs_server *server = NFS_SERVER(inode);
1670 struct nfs_setattrargs arg = {
1671 .fh = NFS_FH(inode),
1674 .bitmask = server->attr_bitmask,
1676 struct nfs_setattrres res = {
1680 struct rpc_message msg = {
1681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1686 unsigned long timestamp = jiffies;
1689 nfs_fattr_init(fattr);
1691 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1692 /* Use that stateid */
1693 } else if (state != NULL) {
1694 nfs4_copy_stateid(&arg.stateid, state, current->files);
1696 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1698 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1699 if (status == 0 && state != NULL)
1700 renew_lease(server, timestamp);
1704 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1705 struct nfs_fattr *fattr, struct iattr *sattr,
1706 struct nfs4_state *state)
1708 struct nfs_server *server = NFS_SERVER(inode);
1709 struct nfs4_exception exception = { };
1712 err = nfs4_handle_exception(server,
1713 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1715 } while (exception.retry);
1719 struct nfs4_closedata {
1721 struct inode *inode;
1722 struct nfs4_state *state;
1723 struct nfs_closeargs arg;
1724 struct nfs_closeres res;
1725 struct nfs_fattr fattr;
1726 unsigned long timestamp;
1729 static void nfs4_free_closedata(void *data)
1731 struct nfs4_closedata *calldata = data;
1732 struct nfs4_state_owner *sp = calldata->state->owner;
1734 nfs4_put_open_state(calldata->state);
1735 nfs_free_seqid(calldata->arg.seqid);
1736 nfs4_put_state_owner(sp);
1737 path_put(&calldata->path);
1741 static void nfs4_close_done(struct rpc_task *task, void *data)
1743 struct nfs4_closedata *calldata = data;
1744 struct nfs4_state *state = calldata->state;
1745 struct nfs_server *server = NFS_SERVER(calldata->inode);
1747 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1748 if (RPC_ASSASSINATED(task))
1750 /* hmm. we are done with the inode, and in the process of freeing
1751 * the state_owner. we keep this around to process errors
1753 switch (task->tk_status) {
1755 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1756 renew_lease(server, calldata->timestamp);
1758 case -NFS4ERR_STALE_STATEID:
1759 case -NFS4ERR_OLD_STATEID:
1760 case -NFS4ERR_BAD_STATEID:
1761 case -NFS4ERR_EXPIRED:
1762 if (calldata->arg.fmode == 0)
1765 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1766 nfs4_restart_rpc(task, server->nfs_client,
1767 &calldata->res.seq_res);
1771 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1772 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1775 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1777 struct nfs4_closedata *calldata = data;
1778 struct nfs4_state *state = calldata->state;
1779 int clear_rd, clear_wr, clear_rdwr;
1781 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1784 clear_rd = clear_wr = clear_rdwr = 0;
1785 spin_lock(&state->owner->so_lock);
1786 /* Calculate the change in open mode */
1787 if (state->n_rdwr == 0) {
1788 if (state->n_rdonly == 0) {
1789 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1790 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1792 if (state->n_wronly == 0) {
1793 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1794 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1797 spin_unlock(&state->owner->so_lock);
1798 if (!clear_rd && !clear_wr && !clear_rdwr) {
1799 /* Note: exit _without_ calling nfs4_close_done */
1800 task->tk_action = NULL;
1803 nfs_fattr_init(calldata->res.fattr);
1804 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1805 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1806 calldata->arg.fmode = FMODE_READ;
1807 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1808 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1809 calldata->arg.fmode = FMODE_WRITE;
1811 calldata->timestamp = jiffies;
1812 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1813 &calldata->arg.seq_args, &calldata->res.seq_res,
1816 rpc_call_start(task);
1819 static const struct rpc_call_ops nfs4_close_ops = {
1820 .rpc_call_prepare = nfs4_close_prepare,
1821 .rpc_call_done = nfs4_close_done,
1822 .rpc_release = nfs4_free_closedata,
1826 * It is possible for data to be read/written from a mem-mapped file
1827 * after the sys_close call (which hits the vfs layer as a flush).
1828 * This means that we can't safely call nfsv4 close on a file until
1829 * the inode is cleared. This in turn means that we are not good
1830 * NFSv4 citizens - we do not indicate to the server to update the file's
1831 * share state even when we are done with one of the three share
1832 * stateid's in the inode.
1834 * NOTE: Caller must be holding the sp->so_owner semaphore!
1836 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1838 struct nfs_server *server = NFS_SERVER(state->inode);
1839 struct nfs4_closedata *calldata;
1840 struct nfs4_state_owner *sp = state->owner;
1841 struct rpc_task *task;
1842 struct rpc_message msg = {
1843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1844 .rpc_cred = state->owner->so_cred,
1846 struct rpc_task_setup task_setup_data = {
1847 .rpc_client = server->client,
1848 .rpc_message = &msg,
1849 .callback_ops = &nfs4_close_ops,
1850 .workqueue = nfsiod_workqueue,
1851 .flags = RPC_TASK_ASYNC,
1853 int status = -ENOMEM;
1855 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1856 if (calldata == NULL)
1858 calldata->inode = state->inode;
1859 calldata->state = state;
1860 calldata->arg.fh = NFS_FH(state->inode);
1861 calldata->arg.stateid = &state->open_stateid;
1862 if (nfs4_has_session(server->nfs_client))
1863 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1864 /* Serialization for the sequence id */
1865 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1866 if (calldata->arg.seqid == NULL)
1867 goto out_free_calldata;
1868 calldata->arg.fmode = 0;
1869 calldata->arg.bitmask = server->cache_consistency_bitmask;
1870 calldata->res.fattr = &calldata->fattr;
1871 calldata->res.seqid = calldata->arg.seqid;
1872 calldata->res.server = server;
1873 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1874 calldata->path.mnt = mntget(path->mnt);
1875 calldata->path.dentry = dget(path->dentry);
1877 msg.rpc_argp = &calldata->arg,
1878 msg.rpc_resp = &calldata->res,
1879 task_setup_data.callback_data = calldata;
1880 task = rpc_run_task(&task_setup_data);
1882 return PTR_ERR(task);
1885 status = rpc_wait_for_completion_task(task);
1891 nfs4_put_open_state(state);
1892 nfs4_put_state_owner(sp);
1896 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1901 /* If the open_intent is for execute, we have an extra check to make */
1902 if (fmode & FMODE_EXEC) {
1903 ret = nfs_may_open(state->inode,
1904 state->owner->so_cred,
1905 nd->intent.open.flags);
1909 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1910 if (!IS_ERR(filp)) {
1911 struct nfs_open_context *ctx;
1912 ctx = nfs_file_open_context(filp);
1916 ret = PTR_ERR(filp);
1918 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1923 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1925 struct path path = {
1926 .mnt = nd->path.mnt,
1929 struct dentry *parent;
1931 struct rpc_cred *cred;
1932 struct nfs4_state *state;
1934 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1936 if (nd->flags & LOOKUP_CREATE) {
1937 attr.ia_mode = nd->intent.open.create_mode;
1938 attr.ia_valid = ATTR_MODE;
1939 if (!IS_POSIXACL(dir))
1940 attr.ia_mode &= ~current_umask();
1943 BUG_ON(nd->intent.open.flags & O_CREAT);
1946 cred = rpc_lookup_cred();
1948 return (struct dentry *)cred;
1949 parent = dentry->d_parent;
1950 /* Protect against concurrent sillydeletes */
1951 nfs_block_sillyrename(parent);
1952 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1954 if (IS_ERR(state)) {
1955 if (PTR_ERR(state) == -ENOENT) {
1956 d_add(dentry, NULL);
1957 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1959 nfs_unblock_sillyrename(parent);
1960 return (struct dentry *)state;
1962 res = d_add_unique(dentry, igrab(state->inode));
1965 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1966 nfs_unblock_sillyrename(parent);
1967 nfs4_intent_set_file(nd, &path, state, fmode);
1972 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1974 struct path path = {
1975 .mnt = nd->path.mnt,
1978 struct rpc_cred *cred;
1979 struct nfs4_state *state;
1980 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1982 cred = rpc_lookup_cred();
1984 return PTR_ERR(cred);
1985 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1987 if (IS_ERR(state)) {
1988 switch (PTR_ERR(state)) {
1994 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
2000 if (state->inode == dentry->d_inode) {
2001 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2002 nfs4_intent_set_file(nd, &path, state, fmode);
2005 nfs4_close_sync(&path, state, fmode);
2011 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2013 if (ctx->state == NULL)
2016 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2018 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2021 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2023 struct nfs4_server_caps_arg args = {
2026 struct nfs4_server_caps_res res = {};
2027 struct rpc_message msg = {
2028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2034 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2036 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2037 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2038 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2039 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2040 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2041 NFS_CAP_CTIME|NFS_CAP_MTIME);
2042 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2043 server->caps |= NFS_CAP_ACLS;
2044 if (res.has_links != 0)
2045 server->caps |= NFS_CAP_HARDLINKS;
2046 if (res.has_symlinks != 0)
2047 server->caps |= NFS_CAP_SYMLINKS;
2048 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2049 server->caps |= NFS_CAP_FILEID;
2050 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2051 server->caps |= NFS_CAP_MODE;
2052 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2053 server->caps |= NFS_CAP_NLINK;
2054 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2055 server->caps |= NFS_CAP_OWNER;
2056 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2057 server->caps |= NFS_CAP_OWNER_GROUP;
2058 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2059 server->caps |= NFS_CAP_ATIME;
2060 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2061 server->caps |= NFS_CAP_CTIME;
2062 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2063 server->caps |= NFS_CAP_MTIME;
2065 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2066 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2067 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2068 server->acl_bitmask = res.acl_bitmask;
2074 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2076 struct nfs4_exception exception = { };
2079 err = nfs4_handle_exception(server,
2080 _nfs4_server_capabilities(server, fhandle),
2082 } while (exception.retry);
2086 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2087 struct nfs_fsinfo *info)
2089 struct nfs4_lookup_root_arg args = {
2090 .bitmask = nfs4_fattr_bitmap,
2092 struct nfs4_lookup_res res = {
2094 .fattr = info->fattr,
2097 struct rpc_message msg = {
2098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2103 nfs_fattr_init(info->fattr);
2104 return nfs4_call_sync(server, &msg, &args, &res, 0);
2107 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2108 struct nfs_fsinfo *info)
2110 struct nfs4_exception exception = { };
2113 err = nfs4_handle_exception(server,
2114 _nfs4_lookup_root(server, fhandle, info),
2116 } while (exception.retry);
2121 * get the file handle for the "/" directory on the server
2123 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2124 struct nfs_fsinfo *info)
2128 status = nfs4_lookup_root(server, fhandle, info);
2130 status = nfs4_server_capabilities(server, fhandle);
2132 status = nfs4_do_fsinfo(server, fhandle, info);
2133 return nfs4_map_errors(status);
2137 * Get locations and (maybe) other attributes of a referral.
2138 * Note that we'll actually follow the referral later when
2139 * we detect fsid mismatch in inode revalidation
2141 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2143 int status = -ENOMEM;
2144 struct page *page = NULL;
2145 struct nfs4_fs_locations *locations = NULL;
2147 page = alloc_page(GFP_KERNEL);
2150 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2151 if (locations == NULL)
2154 status = nfs4_proc_fs_locations(dir, name, locations, page);
2157 /* Make sure server returned a different fsid for the referral */
2158 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2159 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2164 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2165 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2167 fattr->mode = S_IFDIR;
2168 memset(fhandle, 0, sizeof(struct nfs_fh));
2177 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2179 struct nfs4_getattr_arg args = {
2181 .bitmask = server->attr_bitmask,
2183 struct nfs4_getattr_res res = {
2187 struct rpc_message msg = {
2188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2193 nfs_fattr_init(fattr);
2194 return nfs4_call_sync(server, &msg, &args, &res, 0);
2197 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2199 struct nfs4_exception exception = { };
2202 err = nfs4_handle_exception(server,
2203 _nfs4_proc_getattr(server, fhandle, fattr),
2205 } while (exception.retry);
2210 * The file is not closed if it is opened due to the a request to change
2211 * the size of the file. The open call will not be needed once the
2212 * VFS layer lookup-intents are implemented.
2214 * Close is called when the inode is destroyed.
2215 * If we haven't opened the file for O_WRONLY, we
2216 * need to in the size_change case to obtain a stateid.
2219 * Because OPEN is always done by name in nfsv4, it is
2220 * possible that we opened a different file by the same
2221 * name. We can recognize this race condition, but we
2222 * can't do anything about it besides returning an error.
2224 * This will be fixed with VFS changes (lookup-intent).
2227 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2228 struct iattr *sattr)
2230 struct inode *inode = dentry->d_inode;
2231 struct rpc_cred *cred = NULL;
2232 struct nfs4_state *state = NULL;
2235 nfs_fattr_init(fattr);
2237 /* Search for an existing open(O_WRITE) file */
2238 if (sattr->ia_valid & ATTR_FILE) {
2239 struct nfs_open_context *ctx;
2241 ctx = nfs_file_open_context(sattr->ia_file);
2248 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2250 nfs_setattr_update_inode(inode, sattr);
2254 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2255 const struct qstr *name, struct nfs_fh *fhandle,
2256 struct nfs_fattr *fattr)
2259 struct nfs4_lookup_arg args = {
2260 .bitmask = server->attr_bitmask,
2264 struct nfs4_lookup_res res = {
2269 struct rpc_message msg = {
2270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2275 nfs_fattr_init(fattr);
2277 dprintk("NFS call lookupfh %s\n", name->name);
2278 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2279 dprintk("NFS reply lookupfh: %d\n", status);
2283 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2284 struct qstr *name, struct nfs_fh *fhandle,
2285 struct nfs_fattr *fattr)
2287 struct nfs4_exception exception = { };
2290 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2292 if (err == -NFS4ERR_MOVED) {
2296 err = nfs4_handle_exception(server, err, &exception);
2297 } while (exception.retry);
2301 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2302 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2306 dprintk("NFS call lookup %s\n", name->name);
2307 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2308 if (status == -NFS4ERR_MOVED)
2309 status = nfs4_get_referral(dir, name, fattr, fhandle);
2310 dprintk("NFS reply lookup: %d\n", status);
2314 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2316 struct nfs4_exception exception = { };
2319 err = nfs4_handle_exception(NFS_SERVER(dir),
2320 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2322 } while (exception.retry);
2326 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2328 struct nfs_server *server = NFS_SERVER(inode);
2329 struct nfs_fattr fattr;
2330 struct nfs4_accessargs args = {
2331 .fh = NFS_FH(inode),
2332 .bitmask = server->attr_bitmask,
2334 struct nfs4_accessres res = {
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2342 .rpc_cred = entry->cred,
2344 int mode = entry->mask;
2348 * Determine which access bits we want to ask for...
2350 if (mode & MAY_READ)
2351 args.access |= NFS4_ACCESS_READ;
2352 if (S_ISDIR(inode->i_mode)) {
2353 if (mode & MAY_WRITE)
2354 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2355 if (mode & MAY_EXEC)
2356 args.access |= NFS4_ACCESS_LOOKUP;
2358 if (mode & MAY_WRITE)
2359 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2360 if (mode & MAY_EXEC)
2361 args.access |= NFS4_ACCESS_EXECUTE;
2363 nfs_fattr_init(&fattr);
2364 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2367 if (res.access & NFS4_ACCESS_READ)
2368 entry->mask |= MAY_READ;
2369 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2370 entry->mask |= MAY_WRITE;
2371 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2372 entry->mask |= MAY_EXEC;
2373 nfs_refresh_inode(inode, &fattr);
2378 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2380 struct nfs4_exception exception = { };
2383 err = nfs4_handle_exception(NFS_SERVER(inode),
2384 _nfs4_proc_access(inode, entry),
2386 } while (exception.retry);
2391 * TODO: For the time being, we don't try to get any attributes
2392 * along with any of the zero-copy operations READ, READDIR,
2395 * In the case of the first three, we want to put the GETATTR
2396 * after the read-type operation -- this is because it is hard
2397 * to predict the length of a GETATTR response in v4, and thus
2398 * align the READ data correctly. This means that the GETATTR
2399 * may end up partially falling into the page cache, and we should
2400 * shift it into the 'tail' of the xdr_buf before processing.
2401 * To do this efficiently, we need to know the total length
2402 * of data received, which doesn't seem to be available outside
2405 * In the case of WRITE, we also want to put the GETATTR after
2406 * the operation -- in this case because we want to make sure
2407 * we get the post-operation mtime and size. This means that
2408 * we can't use xdr_encode_pages() as written: we need a variant
2409 * of it which would leave room in the 'tail' iovec.
2411 * Both of these changes to the XDR layer would in fact be quite
2412 * minor, but I decided to leave them for a subsequent patch.
2414 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2415 unsigned int pgbase, unsigned int pglen)
2417 struct nfs4_readlink args = {
2418 .fh = NFS_FH(inode),
2423 struct nfs4_readlink_res res;
2424 struct rpc_message msg = {
2425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2430 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2433 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2434 unsigned int pgbase, unsigned int pglen)
2436 struct nfs4_exception exception = { };
2439 err = nfs4_handle_exception(NFS_SERVER(inode),
2440 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2442 } while (exception.retry);
2448 * We will need to arrange for the VFS layer to provide an atomic open.
2449 * Until then, this create/open method is prone to inefficiency and race
2450 * conditions due to the lookup, create, and open VFS calls from sys_open()
2451 * placed on the wire.
2453 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2454 * The file will be opened again in the subsequent VFS open call
2455 * (nfs4_proc_file_open).
2457 * The open for read will just hang around to be used by any process that
2458 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2462 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2463 int flags, struct nameidata *nd)
2465 struct path path = {
2466 .mnt = nd->path.mnt,
2469 struct nfs4_state *state;
2470 struct rpc_cred *cred;
2471 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2474 cred = rpc_lookup_cred();
2476 status = PTR_ERR(cred);
2479 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2481 if (IS_ERR(state)) {
2482 status = PTR_ERR(state);
2485 d_add(dentry, igrab(state->inode));
2486 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2487 if (flags & O_EXCL) {
2488 struct nfs_fattr fattr;
2489 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2491 nfs_setattr_update_inode(state->inode, sattr);
2492 nfs_post_op_update_inode(state->inode, &fattr);
2494 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2495 status = nfs4_intent_set_file(nd, &path, state, fmode);
2497 nfs4_close_sync(&path, state, fmode);
2504 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2506 struct nfs_server *server = NFS_SERVER(dir);
2507 struct nfs_removeargs args = {
2509 .name.len = name->len,
2510 .name.name = name->name,
2511 .bitmask = server->attr_bitmask,
2513 struct nfs_removeres res = {
2516 struct rpc_message msg = {
2517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2523 nfs_fattr_init(&res.dir_attr);
2524 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2526 update_changeattr(dir, &res.cinfo);
2527 nfs_post_op_update_inode(dir, &res.dir_attr);
2532 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2534 struct nfs4_exception exception = { };
2537 err = nfs4_handle_exception(NFS_SERVER(dir),
2538 _nfs4_proc_remove(dir, name),
2540 } while (exception.retry);
2544 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2546 struct nfs_server *server = NFS_SERVER(dir);
2547 struct nfs_removeargs *args = msg->rpc_argp;
2548 struct nfs_removeres *res = msg->rpc_resp;
2550 args->bitmask = server->cache_consistency_bitmask;
2551 res->server = server;
2552 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2555 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2557 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2559 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2560 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2562 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2563 update_changeattr(dir, &res->cinfo);
2564 nfs_post_op_update_inode(dir, &res->dir_attr);
2568 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2569 struct inode *new_dir, struct qstr *new_name)
2571 struct nfs_server *server = NFS_SERVER(old_dir);
2572 struct nfs4_rename_arg arg = {
2573 .old_dir = NFS_FH(old_dir),
2574 .new_dir = NFS_FH(new_dir),
2575 .old_name = old_name,
2576 .new_name = new_name,
2577 .bitmask = server->attr_bitmask,
2579 struct nfs_fattr old_fattr, new_fattr;
2580 struct nfs4_rename_res res = {
2582 .old_fattr = &old_fattr,
2583 .new_fattr = &new_fattr,
2585 struct rpc_message msg = {
2586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2592 nfs_fattr_init(res.old_fattr);
2593 nfs_fattr_init(res.new_fattr);
2594 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2597 update_changeattr(old_dir, &res.old_cinfo);
2598 nfs_post_op_update_inode(old_dir, res.old_fattr);
2599 update_changeattr(new_dir, &res.new_cinfo);
2600 nfs_post_op_update_inode(new_dir, res.new_fattr);
2605 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2606 struct inode *new_dir, struct qstr *new_name)
2608 struct nfs4_exception exception = { };
2611 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2612 _nfs4_proc_rename(old_dir, old_name,
2615 } while (exception.retry);
2619 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2621 struct nfs_server *server = NFS_SERVER(inode);
2622 struct nfs4_link_arg arg = {
2623 .fh = NFS_FH(inode),
2624 .dir_fh = NFS_FH(dir),
2626 .bitmask = server->attr_bitmask,
2628 struct nfs_fattr fattr, dir_attr;
2629 struct nfs4_link_res res = {
2632 .dir_attr = &dir_attr,
2634 struct rpc_message msg = {
2635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2641 nfs_fattr_init(res.fattr);
2642 nfs_fattr_init(res.dir_attr);
2643 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2645 update_changeattr(dir, &res.cinfo);
2646 nfs_post_op_update_inode(dir, res.dir_attr);
2647 nfs_post_op_update_inode(inode, res.fattr);
2653 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2655 struct nfs4_exception exception = { };
2658 err = nfs4_handle_exception(NFS_SERVER(inode),
2659 _nfs4_proc_link(inode, dir, name),
2661 } while (exception.retry);
2665 struct nfs4_createdata {
2666 struct rpc_message msg;
2667 struct nfs4_create_arg arg;
2668 struct nfs4_create_res res;
2670 struct nfs_fattr fattr;
2671 struct nfs_fattr dir_fattr;
2674 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2675 struct qstr *name, struct iattr *sattr, u32 ftype)
2677 struct nfs4_createdata *data;
2679 data = kzalloc(sizeof(*data), GFP_KERNEL);
2681 struct nfs_server *server = NFS_SERVER(dir);
2683 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2684 data->msg.rpc_argp = &data->arg;
2685 data->msg.rpc_resp = &data->res;
2686 data->arg.dir_fh = NFS_FH(dir);
2687 data->arg.server = server;
2688 data->arg.name = name;
2689 data->arg.attrs = sattr;
2690 data->arg.ftype = ftype;
2691 data->arg.bitmask = server->attr_bitmask;
2692 data->res.server = server;
2693 data->res.fh = &data->fh;
2694 data->res.fattr = &data->fattr;
2695 data->res.dir_fattr = &data->dir_fattr;
2696 nfs_fattr_init(data->res.fattr);
2697 nfs_fattr_init(data->res.dir_fattr);
2702 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2704 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2705 &data->arg, &data->res, 1);
2707 update_changeattr(dir, &data->res.dir_cinfo);
2708 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2709 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2714 static void nfs4_free_createdata(struct nfs4_createdata *data)
2719 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2720 struct page *page, unsigned int len, struct iattr *sattr)
2722 struct nfs4_createdata *data;
2723 int status = -ENAMETOOLONG;
2725 if (len > NFS4_MAXPATHLEN)
2729 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2733 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2734 data->arg.u.symlink.pages = &page;
2735 data->arg.u.symlink.len = len;
2737 status = nfs4_do_create(dir, dentry, data);
2739 nfs4_free_createdata(data);
2744 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2745 struct page *page, unsigned int len, struct iattr *sattr)
2747 struct nfs4_exception exception = { };
2750 err = nfs4_handle_exception(NFS_SERVER(dir),
2751 _nfs4_proc_symlink(dir, dentry, page,
2754 } while (exception.retry);
2758 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2759 struct iattr *sattr)
2761 struct nfs4_createdata *data;
2762 int status = -ENOMEM;
2764 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2768 status = nfs4_do_create(dir, dentry, data);
2770 nfs4_free_createdata(data);
2775 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2776 struct iattr *sattr)
2778 struct nfs4_exception exception = { };
2781 err = nfs4_handle_exception(NFS_SERVER(dir),
2782 _nfs4_proc_mkdir(dir, dentry, sattr),
2784 } while (exception.retry);
2788 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2789 u64 cookie, struct page *page, unsigned int count, int plus)
2791 struct inode *dir = dentry->d_inode;
2792 struct nfs4_readdir_arg args = {
2797 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2799 struct nfs4_readdir_res res;
2800 struct rpc_message msg = {
2801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2808 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2809 dentry->d_parent->d_name.name,
2810 dentry->d_name.name,
2811 (unsigned long long)cookie);
2812 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2813 res.pgbase = args.pgbase;
2814 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2816 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2818 nfs_invalidate_atime(dir);
2820 dprintk("%s: returns %d\n", __func__, status);
2824 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2825 u64 cookie, struct page *page, unsigned int count, int plus)
2827 struct nfs4_exception exception = { };
2830 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2831 _nfs4_proc_readdir(dentry, cred, cookie,
2834 } while (exception.retry);
2838 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2839 struct iattr *sattr, dev_t rdev)
2841 struct nfs4_createdata *data;
2842 int mode = sattr->ia_mode;
2843 int status = -ENOMEM;
2845 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2846 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2848 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2853 data->arg.ftype = NF4FIFO;
2854 else if (S_ISBLK(mode)) {
2855 data->arg.ftype = NF4BLK;
2856 data->arg.u.device.specdata1 = MAJOR(rdev);
2857 data->arg.u.device.specdata2 = MINOR(rdev);
2859 else if (S_ISCHR(mode)) {
2860 data->arg.ftype = NF4CHR;
2861 data->arg.u.device.specdata1 = MAJOR(rdev);
2862 data->arg.u.device.specdata2 = MINOR(rdev);
2865 status = nfs4_do_create(dir, dentry, data);
2867 nfs4_free_createdata(data);
2872 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2873 struct iattr *sattr, dev_t rdev)
2875 struct nfs4_exception exception = { };
2878 err = nfs4_handle_exception(NFS_SERVER(dir),
2879 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2881 } while (exception.retry);
2885 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2886 struct nfs_fsstat *fsstat)
2888 struct nfs4_statfs_arg args = {
2890 .bitmask = server->attr_bitmask,
2892 struct nfs4_statfs_res res = {
2895 struct rpc_message msg = {
2896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2901 nfs_fattr_init(fsstat->fattr);
2902 return nfs4_call_sync(server, &msg, &args, &res, 0);
2905 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2907 struct nfs4_exception exception = { };
2910 err = nfs4_handle_exception(server,
2911 _nfs4_proc_statfs(server, fhandle, fsstat),
2913 } while (exception.retry);
2917 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2918 struct nfs_fsinfo *fsinfo)
2920 struct nfs4_fsinfo_arg args = {
2922 .bitmask = server->attr_bitmask,
2924 struct nfs4_fsinfo_res res = {
2927 struct rpc_message msg = {
2928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2933 return nfs4_call_sync(server, &msg, &args, &res, 0);
2936 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2938 struct nfs4_exception exception = { };
2942 err = nfs4_handle_exception(server,
2943 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2945 } while (exception.retry);
2949 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2951 nfs_fattr_init(fsinfo->fattr);
2952 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2955 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2956 struct nfs_pathconf *pathconf)
2958 struct nfs4_pathconf_arg args = {
2960 .bitmask = server->attr_bitmask,
2962 struct nfs4_pathconf_res res = {
2963 .pathconf = pathconf,
2965 struct rpc_message msg = {
2966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2971 /* None of the pathconf attributes are mandatory to implement */
2972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2973 memset(pathconf, 0, sizeof(*pathconf));
2977 nfs_fattr_init(pathconf->fattr);
2978 return nfs4_call_sync(server, &msg, &args, &res, 0);
2981 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2982 struct nfs_pathconf *pathconf)
2984 struct nfs4_exception exception = { };
2988 err = nfs4_handle_exception(server,
2989 _nfs4_proc_pathconf(server, fhandle, pathconf),
2991 } while (exception.retry);
2995 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2997 struct nfs_server *server = NFS_SERVER(data->inode);
2999 dprintk("--> %s\n", __func__);
3001 /* nfs4_sequence_free_slot called in the read rpc_call_done */
3002 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
3004 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3005 nfs4_restart_rpc(task, server->nfs_client, &data->res.seq_res);
3009 nfs_invalidate_atime(data->inode);
3010 if (task->tk_status > 0)
3011 renew_lease(server, data->timestamp);
3012 else if (task->tk_status < 0)
3013 nfs4_sequence_free_slot(server->nfs_client, &data->res.seq_res);
3018 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3020 data->timestamp = jiffies;
3021 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3024 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3026 struct inode *inode = data->inode;
3028 /* slot is freed in nfs_writeback_done */
3029 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3032 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3033 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
3034 &data->res.seq_res);
3037 if (task->tk_status >= 0) {
3038 renew_lease(NFS_SERVER(inode), data->timestamp);
3039 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3044 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3046 struct nfs_server *server = NFS_SERVER(data->inode);
3048 data->args.bitmask = server->cache_consistency_bitmask;
3049 data->res.server = server;
3050 data->timestamp = jiffies;
3052 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3055 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3057 struct inode *inode = data->inode;
3059 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3061 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3062 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
3063 &data->res.seq_res);
3066 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3067 &data->res.seq_res);
3068 nfs_refresh_inode(inode, data->res.fattr);
3072 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3074 struct nfs_server *server = NFS_SERVER(data->inode);
3076 data->args.bitmask = server->cache_consistency_bitmask;
3077 data->res.server = server;
3078 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3082 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3083 * standalone procedure for queueing an asynchronous RENEW.
3085 static void nfs4_renew_done(struct rpc_task *task, void *data)
3087 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3088 unsigned long timestamp = (unsigned long)data;
3090 if (task->tk_status < 0) {
3091 /* Unless we're shutting down, schedule state recovery! */
3092 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3093 nfs4_schedule_state_recovery(clp);
3096 spin_lock(&clp->cl_lock);
3097 if (time_before(clp->cl_last_renewal,timestamp))
3098 clp->cl_last_renewal = timestamp;
3099 spin_unlock(&clp->cl_lock);
3102 static const struct rpc_call_ops nfs4_renew_ops = {
3103 .rpc_call_done = nfs4_renew_done,
3106 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3108 struct rpc_message msg = {
3109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3114 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3115 &nfs4_renew_ops, (void *)jiffies);
3118 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3120 struct rpc_message msg = {
3121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3125 unsigned long now = jiffies;
3128 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3131 spin_lock(&clp->cl_lock);
3132 if (time_before(clp->cl_last_renewal,now))
3133 clp->cl_last_renewal = now;
3134 spin_unlock(&clp->cl_lock);
3138 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3140 return (server->caps & NFS_CAP_ACLS)
3141 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3142 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3145 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3146 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3149 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3151 static void buf_to_pages(const void *buf, size_t buflen,
3152 struct page **pages, unsigned int *pgbase)
3154 const void *p = buf;
3156 *pgbase = offset_in_page(buf);
3158 while (p < buf + buflen) {
3159 *(pages++) = virt_to_page(p);
3160 p += PAGE_CACHE_SIZE;
3164 struct nfs4_cached_acl {
3170 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3172 struct nfs_inode *nfsi = NFS_I(inode);
3174 spin_lock(&inode->i_lock);
3175 kfree(nfsi->nfs4_acl);
3176 nfsi->nfs4_acl = acl;
3177 spin_unlock(&inode->i_lock);
3180 static void nfs4_zap_acl_attr(struct inode *inode)
3182 nfs4_set_cached_acl(inode, NULL);
3185 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3187 struct nfs_inode *nfsi = NFS_I(inode);
3188 struct nfs4_cached_acl *acl;
3191 spin_lock(&inode->i_lock);
3192 acl = nfsi->nfs4_acl;
3195 if (buf == NULL) /* user is just asking for length */
3197 if (acl->cached == 0)
3199 ret = -ERANGE; /* see getxattr(2) man page */
3200 if (acl->len > buflen)
3202 memcpy(buf, acl->data, acl->len);
3206 spin_unlock(&inode->i_lock);
3210 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3212 struct nfs4_cached_acl *acl;
3214 if (buf && acl_len <= PAGE_SIZE) {
3215 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3219 memcpy(acl->data, buf, acl_len);
3221 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3228 nfs4_set_cached_acl(inode, acl);
3231 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3233 struct page *pages[NFS4ACL_MAXPAGES];
3234 struct nfs_getaclargs args = {
3235 .fh = NFS_FH(inode),
3239 struct nfs_getaclres res = {
3243 struct rpc_message msg = {
3244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3248 struct page *localpage = NULL;
3251 if (buflen < PAGE_SIZE) {
3252 /* As long as we're doing a round trip to the server anyway,
3253 * let's be prepared for a page of acl data. */
3254 localpage = alloc_page(GFP_KERNEL);
3255 resp_buf = page_address(localpage);
3256 if (localpage == NULL)
3258 args.acl_pages[0] = localpage;
3259 args.acl_pgbase = 0;
3260 args.acl_len = PAGE_SIZE;
3263 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3265 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3268 if (res.acl_len > args.acl_len)
3269 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3271 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3274 if (res.acl_len > buflen)
3277 memcpy(buf, resp_buf, res.acl_len);
3282 __free_page(localpage);
3286 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3288 struct nfs4_exception exception = { };
3291 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3294 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3295 } while (exception.retry);
3299 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3301 struct nfs_server *server = NFS_SERVER(inode);
3304 if (!nfs4_server_supports_acls(server))
3306 ret = nfs_revalidate_inode(server, inode);
3309 ret = nfs4_read_cached_acl(inode, buf, buflen);
3312 return nfs4_get_acl_uncached(inode, buf, buflen);
3315 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3317 struct nfs_server *server = NFS_SERVER(inode);
3318 struct page *pages[NFS4ACL_MAXPAGES];
3319 struct nfs_setaclargs arg = {
3320 .fh = NFS_FH(inode),
3324 struct nfs_setaclres res;
3325 struct rpc_message msg = {
3326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3332 if (!nfs4_server_supports_acls(server))
3334 nfs_inode_return_delegation(inode);
3335 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3336 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3337 nfs_access_zap_cache(inode);
3338 nfs_zap_acl_cache(inode);
3342 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3344 struct nfs4_exception exception = { };
3347 err = nfs4_handle_exception(NFS_SERVER(inode),
3348 __nfs4_proc_set_acl(inode, buf, buflen),
3350 } while (exception.retry);
3355 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3357 if (!clp || task->tk_status >= 0)
3359 switch(task->tk_status) {
3360 case -NFS4ERR_ADMIN_REVOKED:
3361 case -NFS4ERR_BAD_STATEID:
3362 case -NFS4ERR_OPENMODE:
3365 nfs4_state_mark_reclaim_nograce(clp, state);
3366 case -NFS4ERR_STALE_CLIENTID:
3367 case -NFS4ERR_STALE_STATEID:
3368 case -NFS4ERR_EXPIRED:
3369 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3370 nfs4_schedule_state_recovery(clp);
3371 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3372 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3373 task->tk_status = 0;
3375 #if defined(CONFIG_NFS_V4_1)
3376 case -NFS4ERR_BADSESSION:
3377 case -NFS4ERR_BADSLOT:
3378 case -NFS4ERR_BAD_HIGH_SLOT:
3379 case -NFS4ERR_DEADSESSION:
3380 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3381 case -NFS4ERR_SEQ_FALSE_RETRY:
3382 case -NFS4ERR_SEQ_MISORDERED:
3383 dprintk("%s ERROR %d, Reset session\n", __func__,
3385 set_bit(NFS4CLNT_SESSION_RESET, &clp->cl_state);
3386 task->tk_status = 0;
3388 #endif /* CONFIG_NFS_V4_1 */
3389 case -NFS4ERR_DELAY:
3391 nfs_inc_server_stats(server, NFSIOS_DELAY);
3392 case -NFS4ERR_GRACE:
3393 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3394 task->tk_status = 0;
3396 case -NFS4ERR_OLD_STATEID:
3397 task->tk_status = 0;
3400 task->tk_status = nfs4_map_errors(task->tk_status);
3405 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3407 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3410 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3412 nfs4_verifier sc_verifier;
3413 struct nfs4_setclientid setclientid = {
3414 .sc_verifier = &sc_verifier,
3417 struct rpc_message msg = {
3418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3419 .rpc_argp = &setclientid,
3427 p = (__be32*)sc_verifier.data;
3428 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3429 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3432 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3433 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3435 rpc_peeraddr2str(clp->cl_rpcclient,
3437 rpc_peeraddr2str(clp->cl_rpcclient,
3439 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3440 clp->cl_id_uniquifier);
3441 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3442 sizeof(setclientid.sc_netid),
3443 rpc_peeraddr2str(clp->cl_rpcclient,
3444 RPC_DISPLAY_NETID));
3445 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3446 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3447 clp->cl_ipaddr, port >> 8, port & 255);
3449 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3450 if (status != -NFS4ERR_CLID_INUSE)
3455 ssleep(clp->cl_lease_time + 1);
3457 if (++clp->cl_id_uniquifier == 0)
3463 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3465 struct nfs_fsinfo fsinfo;
3466 struct rpc_message msg = {
3467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3469 .rpc_resp = &fsinfo,
3476 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3478 spin_lock(&clp->cl_lock);
3479 clp->cl_lease_time = fsinfo.lease_time * HZ;
3480 clp->cl_last_renewal = now;
3481 spin_unlock(&clp->cl_lock);
3486 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3491 err = _nfs4_proc_setclientid_confirm(clp, cred);
3495 case -NFS4ERR_RESOURCE:
3496 /* The IBM lawyers misread another document! */
3497 case -NFS4ERR_DELAY:
3498 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3504 struct nfs4_delegreturndata {
3505 struct nfs4_delegreturnargs args;
3506 struct nfs4_delegreturnres res;
3508 nfs4_stateid stateid;
3509 unsigned long timestamp;
3510 struct nfs_fattr fattr;
3514 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3516 struct nfs4_delegreturndata *data = calldata;
3518 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3521 data->rpc_status = task->tk_status;
3522 if (data->rpc_status == 0)
3523 renew_lease(data->res.server, data->timestamp);
3526 static void nfs4_delegreturn_release(void *calldata)
3531 #if defined(CONFIG_NFS_V4_1)
3532 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3534 struct nfs4_delegreturndata *d_data;
3536 d_data = (struct nfs4_delegreturndata *)data;
3538 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3539 &d_data->args.seq_args,
3540 &d_data->res.seq_res, 1, task))
3542 rpc_call_start(task);
3544 #endif /* CONFIG_NFS_V4_1 */
3546 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3547 #if defined(CONFIG_NFS_V4_1)
3548 .rpc_call_prepare = nfs4_delegreturn_prepare,
3549 #endif /* CONFIG_NFS_V4_1 */
3550 .rpc_call_done = nfs4_delegreturn_done,
3551 .rpc_release = nfs4_delegreturn_release,
3554 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3556 struct nfs4_delegreturndata *data;
3557 struct nfs_server *server = NFS_SERVER(inode);
3558 struct rpc_task *task;
3559 struct rpc_message msg = {
3560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3563 struct rpc_task_setup task_setup_data = {
3564 .rpc_client = server->client,
3565 .rpc_message = &msg,
3566 .callback_ops = &nfs4_delegreturn_ops,
3567 .flags = RPC_TASK_ASYNC,
3571 data = kzalloc(sizeof(*data), GFP_KERNEL);
3574 data->args.fhandle = &data->fh;
3575 data->args.stateid = &data->stateid;
3576 data->args.bitmask = server->attr_bitmask;
3577 nfs_copy_fh(&data->fh, NFS_FH(inode));
3578 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3579 data->res.fattr = &data->fattr;
3580 data->res.server = server;
3581 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3582 nfs_fattr_init(data->res.fattr);
3583 data->timestamp = jiffies;
3584 data->rpc_status = 0;
3586 task_setup_data.callback_data = data;
3587 msg.rpc_argp = &data->args,
3588 msg.rpc_resp = &data->res,
3589 task = rpc_run_task(&task_setup_data);
3591 return PTR_ERR(task);
3594 status = nfs4_wait_for_completion_rpc_task(task);
3597 status = data->rpc_status;
3600 nfs_refresh_inode(inode, &data->fattr);
3606 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3608 struct nfs_server *server = NFS_SERVER(inode);
3609 struct nfs4_exception exception = { };
3612 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3614 case -NFS4ERR_STALE_STATEID:
3615 case -NFS4ERR_EXPIRED:
3619 err = nfs4_handle_exception(server, err, &exception);
3620 } while (exception.retry);
3624 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3625 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3628 * sleep, with exponential backoff, and retry the LOCK operation.
3630 static unsigned long
3631 nfs4_set_lock_task_retry(unsigned long timeout)
3633 schedule_timeout_killable(timeout);
3635 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3636 return NFS4_LOCK_MAXTIMEOUT;
3640 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3642 struct inode *inode = state->inode;
3643 struct nfs_server *server = NFS_SERVER(inode);
3644 struct nfs_client *clp = server->nfs_client;
3645 struct nfs_lockt_args arg = {
3646 .fh = NFS_FH(inode),
3649 struct nfs_lockt_res res = {
3652 struct rpc_message msg = {
3653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3656 .rpc_cred = state->owner->so_cred,
3658 struct nfs4_lock_state *lsp;
3661 arg.lock_owner.clientid = clp->cl_clientid;
3662 status = nfs4_set_lock_state(state, request);
3665 lsp = request->fl_u.nfs4_fl.owner;
3666 arg.lock_owner.id = lsp->ls_id.id;
3667 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3670 request->fl_type = F_UNLCK;
3672 case -NFS4ERR_DENIED:
3675 request->fl_ops->fl_release_private(request);
3680 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3682 struct nfs4_exception exception = { };
3686 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3687 _nfs4_proc_getlk(state, cmd, request),
3689 } while (exception.retry);
3693 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3696 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3698 res = posix_lock_file_wait(file, fl);
3701 res = flock_lock_file_wait(file, fl);
3709 struct nfs4_unlockdata {
3710 struct nfs_locku_args arg;
3711 struct nfs_locku_res res;
3712 struct nfs4_lock_state *lsp;
3713 struct nfs_open_context *ctx;
3714 struct file_lock fl;
3715 const struct nfs_server *server;
3716 unsigned long timestamp;
3719 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3720 struct nfs_open_context *ctx,
3721 struct nfs4_lock_state *lsp,
3722 struct nfs_seqid *seqid)
3724 struct nfs4_unlockdata *p;
3725 struct inode *inode = lsp->ls_state->inode;
3727 p = kzalloc(sizeof(*p), GFP_KERNEL);
3730 p->arg.fh = NFS_FH(inode);
3732 p->arg.seqid = seqid;
3733 p->res.seqid = seqid;
3734 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3735 p->arg.stateid = &lsp->ls_stateid;
3737 atomic_inc(&lsp->ls_count);
3738 /* Ensure we don't close file until we're done freeing locks! */
3739 p->ctx = get_nfs_open_context(ctx);
3740 memcpy(&p->fl, fl, sizeof(p->fl));
3741 p->server = NFS_SERVER(inode);
3745 static void nfs4_locku_release_calldata(void *data)
3747 struct nfs4_unlockdata *calldata = data;
3748 nfs_free_seqid(calldata->arg.seqid);
3749 nfs4_put_lock_state(calldata->lsp);
3750 put_nfs_open_context(calldata->ctx);
3754 static void nfs4_locku_done(struct rpc_task *task, void *data)
3756 struct nfs4_unlockdata *calldata = data;
3758 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3760 if (RPC_ASSASSINATED(task))
3762 switch (task->tk_status) {
3764 memcpy(calldata->lsp->ls_stateid.data,
3765 calldata->res.stateid.data,
3766 sizeof(calldata->lsp->ls_stateid.data));
3767 renew_lease(calldata->server, calldata->timestamp);
3769 case -NFS4ERR_BAD_STATEID:
3770 case -NFS4ERR_OLD_STATEID:
3771 case -NFS4ERR_STALE_STATEID:
3772 case -NFS4ERR_EXPIRED:
3775 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3776 nfs4_restart_rpc(task,
3777 calldata->server->nfs_client,
3778 &calldata->res.seq_res);
3780 nfs4_sequence_free_slot(calldata->server->nfs_client,
3781 &calldata->res.seq_res);
3784 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3786 struct nfs4_unlockdata *calldata = data;
3788 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3790 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3791 /* Note: exit _without_ running nfs4_locku_done */
3792 task->tk_action = NULL;
3795 calldata->timestamp = jiffies;
3796 if (nfs4_setup_sequence(calldata->server->nfs_client,
3797 &calldata->arg.seq_args,
3798 &calldata->res.seq_res, 1, task))
3800 rpc_call_start(task);
3803 static const struct rpc_call_ops nfs4_locku_ops = {
3804 .rpc_call_prepare = nfs4_locku_prepare,
3805 .rpc_call_done = nfs4_locku_done,
3806 .rpc_release = nfs4_locku_release_calldata,
3809 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3810 struct nfs_open_context *ctx,
3811 struct nfs4_lock_state *lsp,
3812 struct nfs_seqid *seqid)
3814 struct nfs4_unlockdata *data;
3815 struct rpc_message msg = {
3816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3817 .rpc_cred = ctx->cred,
3819 struct rpc_task_setup task_setup_data = {
3820 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3821 .rpc_message = &msg,
3822 .callback_ops = &nfs4_locku_ops,
3823 .workqueue = nfsiod_workqueue,
3824 .flags = RPC_TASK_ASYNC,
3827 /* Ensure this is an unlock - when canceling a lock, the
3828 * canceled lock is passed in, and it won't be an unlock.
3830 fl->fl_type = F_UNLCK;
3832 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3834 nfs_free_seqid(seqid);
3835 return ERR_PTR(-ENOMEM);
3838 msg.rpc_argp = &data->arg,
3839 msg.rpc_resp = &data->res,
3840 task_setup_data.callback_data = data;
3841 return rpc_run_task(&task_setup_data);
3844 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3846 struct nfs_inode *nfsi = NFS_I(state->inode);
3847 struct nfs_seqid *seqid;
3848 struct nfs4_lock_state *lsp;
3849 struct rpc_task *task;
3851 unsigned char fl_flags = request->fl_flags;
3853 status = nfs4_set_lock_state(state, request);
3854 /* Unlock _before_ we do the RPC call */
3855 request->fl_flags |= FL_EXISTS;
3856 down_read(&nfsi->rwsem);
3857 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3858 up_read(&nfsi->rwsem);
3861 up_read(&nfsi->rwsem);
3864 /* Is this a delegated lock? */
3865 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3867 lsp = request->fl_u.nfs4_fl.owner;
3868 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3872 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3873 status = PTR_ERR(task);
3876 status = nfs4_wait_for_completion_rpc_task(task);
3879 request->fl_flags = fl_flags;
3883 struct nfs4_lockdata {
3884 struct nfs_lock_args arg;
3885 struct nfs_lock_res res;
3886 struct nfs4_lock_state *lsp;
3887 struct nfs_open_context *ctx;
3888 struct file_lock fl;
3889 unsigned long timestamp;
3892 struct nfs_server *server;
3895 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3896 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3898 struct nfs4_lockdata *p;
3899 struct inode *inode = lsp->ls_state->inode;
3900 struct nfs_server *server = NFS_SERVER(inode);
3902 p = kzalloc(sizeof(*p), GFP_KERNEL);
3906 p->arg.fh = NFS_FH(inode);
3908 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3909 if (p->arg.open_seqid == NULL)
3911 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3912 if (p->arg.lock_seqid == NULL)
3913 goto out_free_seqid;
3914 p->arg.lock_stateid = &lsp->ls_stateid;
3915 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3916 p->arg.lock_owner.id = lsp->ls_id.id;
3917 p->res.lock_seqid = p->arg.lock_seqid;
3918 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3921 atomic_inc(&lsp->ls_count);
3922 p->ctx = get_nfs_open_context(ctx);
3923 memcpy(&p->fl, fl, sizeof(p->fl));
3926 nfs_free_seqid(p->arg.open_seqid);
3932 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3934 struct nfs4_lockdata *data = calldata;
3935 struct nfs4_state *state = data->lsp->ls_state;
3937 dprintk("%s: begin!\n", __func__);
3938 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3940 /* Do we need to do an open_to_lock_owner? */
3941 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3942 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3944 data->arg.open_stateid = &state->stateid;
3945 data->arg.new_lock_owner = 1;
3946 data->res.open_seqid = data->arg.open_seqid;
3948 data->arg.new_lock_owner = 0;
3949 data->timestamp = jiffies;
3950 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3951 &data->res.seq_res, 1, task))
3953 rpc_call_start(task);
3954 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3957 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3959 struct nfs4_lockdata *data = calldata;
3961 dprintk("%s: begin!\n", __func__);
3963 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3966 data->rpc_status = task->tk_status;
3967 if (RPC_ASSASSINATED(task))
3969 if (data->arg.new_lock_owner != 0) {
3970 if (data->rpc_status == 0)
3971 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3975 if (data->rpc_status == 0) {
3976 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3977 sizeof(data->lsp->ls_stateid.data));
3978 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3979 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3982 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3985 static void nfs4_lock_release(void *calldata)
3987 struct nfs4_lockdata *data = calldata;
3989 dprintk("%s: begin!\n", __func__);
3990 nfs_free_seqid(data->arg.open_seqid);
3991 if (data->cancelled != 0) {
3992 struct rpc_task *task;
3993 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3994 data->arg.lock_seqid);
3997 dprintk("%s: cancelling lock!\n", __func__);
3999 nfs_free_seqid(data->arg.lock_seqid);
4000 nfs4_put_lock_state(data->lsp);
4001 put_nfs_open_context(data->ctx);
4003 dprintk("%s: done!\n", __func__);
4006 static const struct rpc_call_ops nfs4_lock_ops = {
4007 .rpc_call_prepare = nfs4_lock_prepare,
4008 .rpc_call_done = nfs4_lock_done,
4009 .rpc_release = nfs4_lock_release,
4012 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
4014 struct nfs4_lockdata *data;
4015 struct rpc_task *task;
4016 struct rpc_message msg = {
4017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4018 .rpc_cred = state->owner->so_cred,
4020 struct rpc_task_setup task_setup_data = {
4021 .rpc_client = NFS_CLIENT(state->inode),
4022 .rpc_message = &msg,
4023 .callback_ops = &nfs4_lock_ops,
4024 .workqueue = nfsiod_workqueue,
4025 .flags = RPC_TASK_ASYNC,
4029 dprintk("%s: begin!\n", __func__);
4030 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4031 fl->fl_u.nfs4_fl.owner);
4035 data->arg.block = 1;
4037 data->arg.reclaim = 1;
4038 msg.rpc_argp = &data->arg,
4039 msg.rpc_resp = &data->res,
4040 task_setup_data.callback_data = data;
4041 task = rpc_run_task(&task_setup_data);
4043 return PTR_ERR(task);
4044 ret = nfs4_wait_for_completion_rpc_task(task);
4046 ret = data->rpc_status;
4048 data->cancelled = 1;
4050 dprintk("%s: done, ret = %d!\n", __func__, ret);
4054 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4056 struct nfs_server *server = NFS_SERVER(state->inode);
4057 struct nfs4_exception exception = { };
4061 /* Cache the lock if possible... */
4062 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4064 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4065 if (err != -NFS4ERR_DELAY)
4067 nfs4_handle_exception(server, err, &exception);
4068 } while (exception.retry);
4072 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4074 struct nfs_server *server = NFS_SERVER(state->inode);
4075 struct nfs4_exception exception = { };
4078 err = nfs4_set_lock_state(state, request);
4082 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4084 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4088 case -NFS4ERR_GRACE:
4089 case -NFS4ERR_DELAY:
4090 nfs4_handle_exception(server, err, &exception);
4093 } while (exception.retry);
4098 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4100 struct nfs_inode *nfsi = NFS_I(state->inode);
4101 unsigned char fl_flags = request->fl_flags;
4104 /* Is this a delegated open? */
4105 status = nfs4_set_lock_state(state, request);
4108 request->fl_flags |= FL_ACCESS;
4109 status = do_vfs_lock(request->fl_file, request);
4112 down_read(&nfsi->rwsem);
4113 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4114 /* Yes: cache locks! */
4115 /* ...but avoid races with delegation recall... */
4116 request->fl_flags = fl_flags & ~FL_SLEEP;
4117 status = do_vfs_lock(request->fl_file, request);
4120 status = _nfs4_do_setlk(state, cmd, request, 0);
4123 /* Note: we always want to sleep here! */
4124 request->fl_flags = fl_flags | FL_SLEEP;
4125 if (do_vfs_lock(request->fl_file, request) < 0)
4126 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4128 up_read(&nfsi->rwsem);
4130 request->fl_flags = fl_flags;
4134 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4136 struct nfs4_exception exception = { };
4140 err = _nfs4_proc_setlk(state, cmd, request);
4141 if (err == -NFS4ERR_DENIED)
4143 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4145 } while (exception.retry);
4150 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4152 struct nfs_open_context *ctx;
4153 struct nfs4_state *state;
4154 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4157 /* verify open state */
4158 ctx = nfs_file_open_context(filp);
4161 if (request->fl_start < 0 || request->fl_end < 0)
4164 if (IS_GETLK(cmd)) {
4166 return nfs4_proc_getlk(state, F_GETLK, request);
4170 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4173 if (request->fl_type == F_UNLCK) {
4175 return nfs4_proc_unlck(state, cmd, request);
4182 status = nfs4_proc_setlk(state, cmd, request);
4183 if ((status != -EAGAIN) || IS_SETLK(cmd))
4185 timeout = nfs4_set_lock_task_retry(timeout);
4186 status = -ERESTARTSYS;
4189 } while(status < 0);
4193 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4195 struct nfs_server *server = NFS_SERVER(state->inode);
4196 struct nfs4_exception exception = { };
4199 err = nfs4_set_lock_state(state, fl);
4203 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4206 printk(KERN_ERR "%s: unhandled error %d.\n",
4211 case -NFS4ERR_EXPIRED:
4212 case -NFS4ERR_STALE_CLIENTID:
4213 case -NFS4ERR_STALE_STATEID:
4214 nfs4_schedule_state_recovery(server->nfs_client);
4218 * The show must go on: exit, but mark the
4219 * stateid as needing recovery.
4221 case -NFS4ERR_ADMIN_REVOKED:
4222 case -NFS4ERR_BAD_STATEID:
4223 case -NFS4ERR_OPENMODE:
4224 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4228 case -NFS4ERR_DENIED:
4229 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4232 case -NFS4ERR_DELAY:
4235 err = nfs4_handle_exception(server, err, &exception);
4236 } while (exception.retry);
4241 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4243 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4244 size_t buflen, int flags)
4246 struct inode *inode = dentry->d_inode;
4248 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4251 return nfs4_proc_set_acl(inode, buf, buflen);
4254 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4255 * and that's what we'll do for e.g. user attributes that haven't been set.
4256 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4257 * attributes in kernel-managed attribute namespaces. */
4258 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4261 struct inode *inode = dentry->d_inode;
4263 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4266 return nfs4_proc_get_acl(inode, buf, buflen);
4269 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4271 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4273 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4275 if (buf && buflen < len)
4278 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4282 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4284 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4285 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4286 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4289 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4290 NFS_ATTR_FATTR_NLINK;
4291 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4295 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4296 struct nfs4_fs_locations *fs_locations, struct page *page)
4298 struct nfs_server *server = NFS_SERVER(dir);
4300 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4301 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4303 struct nfs4_fs_locations_arg args = {
4304 .dir_fh = NFS_FH(dir),
4309 struct nfs4_fs_locations_res res = {
4310 .fs_locations = fs_locations,
4312 struct rpc_message msg = {
4313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4319 dprintk("%s: start\n", __func__);
4320 nfs_fattr_init(&fs_locations->fattr);
4321 fs_locations->server = server;
4322 fs_locations->nlocations = 0;
4323 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4324 nfs_fixup_referral_attributes(&fs_locations->fattr);
4325 dprintk("%s: returned status = %d\n", __func__, status);
4329 #ifdef CONFIG_NFS_V4_1
4331 * nfs4_proc_exchange_id()
4333 * Since the clientid has expired, all compounds using sessions
4334 * associated with the stale clientid will be returning
4335 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4336 * be in some phase of session reset.
4338 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4340 nfs4_verifier verifier;
4341 struct nfs41_exchange_id_args args = {
4343 .flags = clp->cl_exchange_flags,
4345 struct nfs41_exchange_id_res res = {
4349 struct rpc_message msg = {
4350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4357 dprintk("--> %s\n", __func__);
4358 BUG_ON(clp == NULL);
4360 p = (u32 *)verifier.data;
4361 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4362 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4363 args.verifier = &verifier;
4366 args.id_len = scnprintf(args.id, sizeof(args.id),
4369 rpc_peeraddr2str(clp->cl_rpcclient,
4371 clp->cl_id_uniquifier);
4373 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4375 if (status != NFS4ERR_CLID_INUSE)
4381 if (++clp->cl_id_uniquifier == 0)
4385 dprintk("<-- %s status= %d\n", __func__, status);
4389 struct nfs4_get_lease_time_data {
4390 struct nfs4_get_lease_time_args *args;
4391 struct nfs4_get_lease_time_res *res;
4392 struct nfs_client *clp;
4395 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4399 struct nfs4_get_lease_time_data *data =
4400 (struct nfs4_get_lease_time_data *)calldata;
4402 dprintk("--> %s\n", __func__);
4403 /* just setup sequence, do not trigger session recovery
4404 since we're invoked within one */
4405 ret = nfs41_setup_sequence(data->clp->cl_session,
4406 &data->args->la_seq_args,
4407 &data->res->lr_seq_res, 0, task);
4409 BUG_ON(ret == -EAGAIN);
4410 rpc_call_start(task);
4411 dprintk("<-- %s\n", __func__);
4415 * Called from nfs4_state_manager thread for session setup, so don't recover
4416 * from sequence operation or clientid errors.
4418 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4420 struct nfs4_get_lease_time_data *data =
4421 (struct nfs4_get_lease_time_data *)calldata;
4423 dprintk("--> %s\n", __func__);
4424 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4425 switch (task->tk_status) {
4426 case -NFS4ERR_DELAY:
4427 case -NFS4ERR_GRACE:
4428 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4429 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4430 task->tk_status = 0;
4431 rpc_restart_call(task);
4434 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4435 dprintk("<-- %s\n", __func__);
4438 struct rpc_call_ops nfs4_get_lease_time_ops = {
4439 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4440 .rpc_call_done = nfs4_get_lease_time_done,
4443 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4445 struct rpc_task *task;
4446 struct nfs4_get_lease_time_args args;
4447 struct nfs4_get_lease_time_res res = {
4448 .lr_fsinfo = fsinfo,
4450 struct nfs4_get_lease_time_data data = {
4455 struct rpc_message msg = {
4456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4460 struct rpc_task_setup task_setup = {
4461 .rpc_client = clp->cl_rpcclient,
4462 .rpc_message = &msg,
4463 .callback_ops = &nfs4_get_lease_time_ops,
4464 .callback_data = &data
4468 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4469 dprintk("--> %s\n", __func__);
4470 task = rpc_run_task(&task_setup);
4473 status = PTR_ERR(task);
4475 status = task->tk_status;
4478 dprintk("<-- %s return %d\n", __func__, status);
4484 * Reset a slot table
4486 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4487 int old_max_slots, int ivalue)
4492 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4495 * Until we have dynamic slot table adjustment, insist
4496 * upon the same slot table size
4498 if (max_slots != old_max_slots) {
4499 dprintk("%s reset slot table does't match old\n",
4501 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4504 spin_lock(&tbl->slot_tbl_lock);
4505 for (i = 0; i < max_slots; ++i)
4506 tbl->slots[i].seq_nr = ivalue;
4507 tbl->highest_used_slotid = -1;
4508 spin_unlock(&tbl->slot_tbl_lock);
4509 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4510 tbl, tbl->slots, tbl->max_slots);
4512 dprintk("<-- %s: return %d\n", __func__, ret);
4517 * Reset the forechannel and backchannel slot tables
4519 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4523 status = nfs4_reset_slot_table(&session->fc_slot_table,
4524 session->fc_attrs.max_reqs,
4525 session->fc_slot_table.max_slots,
4530 status = nfs4_reset_slot_table(&session->bc_slot_table,
4531 session->bc_attrs.max_reqs,
4532 session->bc_slot_table.max_slots,
4537 /* Destroy the slot table */
4538 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4540 if (session->fc_slot_table.slots != NULL) {
4541 kfree(session->fc_slot_table.slots);
4542 session->fc_slot_table.slots = NULL;
4544 if (session->bc_slot_table.slots != NULL) {
4545 kfree(session->bc_slot_table.slots);
4546 session->bc_slot_table.slots = NULL;
4552 * Initialize slot table
4554 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4555 int max_slots, int ivalue)
4558 struct nfs4_slot *slot;
4561 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4563 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4565 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4568 for (i = 0; i < max_slots; ++i)
4569 slot[i].seq_nr = ivalue;
4572 spin_lock(&tbl->slot_tbl_lock);
4573 if (tbl->slots != NULL) {
4574 spin_unlock(&tbl->slot_tbl_lock);
4575 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4576 __func__, tbl, tbl->slots);
4580 tbl->max_slots = max_slots;
4582 tbl->highest_used_slotid = -1; /* no slot is currently used */
4583 spin_unlock(&tbl->slot_tbl_lock);
4584 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4585 tbl, tbl->slots, tbl->max_slots);
4587 dprintk("<-- %s: return %d\n", __func__, ret);
4596 * Initialize the forechannel and backchannel tables
4598 static int nfs4_init_slot_tables(struct nfs4_session *session)
4602 status = nfs4_init_slot_table(&session->fc_slot_table,
4603 session->fc_attrs.max_reqs, 1);
4607 status = nfs4_init_slot_table(&session->bc_slot_table,
4608 session->bc_attrs.max_reqs, 0);
4610 nfs4_destroy_slot_tables(session);
4615 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4617 struct nfs4_session *session;
4618 struct nfs4_slot_table *tbl;
4620 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4625 * The create session reply races with the server back
4626 * channel probe. Mark the client NFS_CS_SESSION_INITING
4627 * so that the client back channel can find the
4630 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4632 tbl = &session->fc_slot_table;
4633 spin_lock_init(&tbl->slot_tbl_lock);
4634 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4636 tbl = &session->bc_slot_table;
4637 spin_lock_init(&tbl->slot_tbl_lock);
4638 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4644 void nfs4_destroy_session(struct nfs4_session *session)
4646 nfs4_proc_destroy_session(session);
4647 dprintk("%s Destroy backchannel for xprt %p\n",
4648 __func__, session->clp->cl_rpcclient->cl_xprt);
4649 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4650 NFS41_BC_MIN_CALLBACKS);
4651 nfs4_destroy_slot_tables(session);
4656 * Initialize the values to be used by the client in CREATE_SESSION
4657 * If nfs4_init_session set the fore channel request and response sizes,
4660 * Set the back channel max_resp_sz_cached to zero to force the client to
4661 * always set csa_cachethis to FALSE because the current implementation
4662 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4664 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4666 struct nfs4_session *session = args->client->cl_session;
4667 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4668 mxresp_sz = session->fc_attrs.max_resp_sz;
4671 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4673 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4674 /* Fore channel attributes */
4675 args->fc_attrs.headerpadsz = 0;
4676 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4677 args->fc_attrs.max_resp_sz = mxresp_sz;
4678 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4679 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4680 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4682 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4683 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4685 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4686 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4687 args->fc_attrs.max_reqs);
4689 /* Back channel attributes */
4690 args->bc_attrs.headerpadsz = 0;
4691 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4692 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4693 args->bc_attrs.max_resp_sz_cached = 0;
4694 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4695 args->bc_attrs.max_reqs = 1;
4697 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4698 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4700 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4701 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4702 args->bc_attrs.max_reqs);
4705 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4709 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4710 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4714 #define _verify_fore_channel_attr(_name_) \
4715 _verify_channel_attr("fore", #_name_, \
4716 args->fc_attrs._name_, \
4717 session->fc_attrs._name_)
4719 #define _verify_back_channel_attr(_name_) \
4720 _verify_channel_attr("back", #_name_, \
4721 args->bc_attrs._name_, \
4722 session->bc_attrs._name_)
4725 * The server is not allowed to increase the fore channel header pad size,
4726 * maximum response size, or maximum number of operations.
4728 * The back channel attributes are only negotiatied down: We send what the
4729 * (back channel) server insists upon.
4731 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4732 struct nfs4_session *session)
4736 ret |= _verify_fore_channel_attr(headerpadsz);
4737 ret |= _verify_fore_channel_attr(max_resp_sz);
4738 ret |= _verify_fore_channel_attr(max_ops);
4740 ret |= _verify_back_channel_attr(headerpadsz);
4741 ret |= _verify_back_channel_attr(max_rqst_sz);
4742 ret |= _verify_back_channel_attr(max_resp_sz);
4743 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4744 ret |= _verify_back_channel_attr(max_ops);
4745 ret |= _verify_back_channel_attr(max_reqs);
4750 static int _nfs4_proc_create_session(struct nfs_client *clp)
4752 struct nfs4_session *session = clp->cl_session;
4753 struct nfs41_create_session_args args = {
4755 .cb_program = NFS4_CALLBACK,
4757 struct nfs41_create_session_res res = {
4760 struct rpc_message msg = {
4761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4767 nfs4_init_channel_attrs(&args);
4768 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4770 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4773 /* Verify the session's negotiated channel_attrs values */
4774 status = nfs4_verify_channel_attrs(&args, session);
4776 /* Increment the clientid slot sequence id */
4784 * Issues a CREATE_SESSION operation to the server.
4785 * It is the responsibility of the caller to verify the session is
4786 * expired before calling this routine.
4788 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4792 struct nfs_fsinfo fsinfo;
4793 struct nfs4_session *session = clp->cl_session;
4795 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4797 status = _nfs4_proc_create_session(clp);
4801 /* Init or reset the fore channel */
4803 status = nfs4_reset_slot_tables(session);
4805 status = nfs4_init_slot_tables(session);
4806 dprintk("fore channel slot table initialization returned %d\n", status);
4810 ptr = (unsigned *)&session->sess_id.data[0];
4811 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4812 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4815 /* Lease time is aleady set */
4818 /* Get the lease time */
4819 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4821 /* Update lease time and schedule renewal */
4822 spin_lock(&clp->cl_lock);
4823 clp->cl_lease_time = fsinfo.lease_time * HZ;
4824 clp->cl_last_renewal = jiffies;
4825 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4826 spin_unlock(&clp->cl_lock);
4828 nfs4_schedule_state_renewal(clp);
4831 dprintk("<-- %s\n", __func__);
4836 * Issue the over-the-wire RPC DESTROY_SESSION.
4837 * The caller must serialize access to this routine.
4839 int nfs4_proc_destroy_session(struct nfs4_session *session)
4842 struct rpc_message msg;
4844 dprintk("--> nfs4_proc_destroy_session\n");
4846 /* session is still being setup */
4847 if (session->clp->cl_cons_state != NFS_CS_READY)
4850 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4851 msg.rpc_argp = session;
4852 msg.rpc_resp = NULL;
4853 msg.rpc_cred = NULL;
4854 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4858 "Got error %d from the server on DESTROY_SESSION. "
4859 "Session has been destroyed regardless...\n", status);
4861 dprintk("<-- nfs4_proc_destroy_session\n");
4865 int nfs4_init_session(struct nfs_server *server)
4867 struct nfs_client *clp = server->nfs_client;
4870 if (!nfs4_has_session(clp))
4873 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4874 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4875 ret = nfs4_recover_expired_lease(server);
4877 ret = nfs4_check_client_ready(clp);
4882 * Renew the cl_session lease.
4884 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4886 struct nfs4_sequence_args args;
4887 struct nfs4_sequence_res res;
4889 struct rpc_message msg = {
4890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4896 args.sa_cache_this = 0;
4898 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4902 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4904 struct nfs_client *clp = (struct nfs_client *)data;
4906 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4908 if (task->tk_status < 0) {
4909 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4911 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4913 nfs4_restart_rpc(task, clp, task->tk_msg.rpc_resp);
4917 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4918 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4920 kfree(task->tk_msg.rpc_argp);
4921 kfree(task->tk_msg.rpc_resp);
4923 dprintk("<-- %s\n", __func__);
4926 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4928 struct nfs_client *clp;
4929 struct nfs4_sequence_args *args;
4930 struct nfs4_sequence_res *res;
4932 clp = (struct nfs_client *)data;
4933 args = task->tk_msg.rpc_argp;
4934 res = task->tk_msg.rpc_resp;
4936 if (nfs4_setup_sequence(clp, args, res, 0, task))
4938 rpc_call_start(task);
4941 static const struct rpc_call_ops nfs41_sequence_ops = {
4942 .rpc_call_done = nfs41_sequence_call_done,
4943 .rpc_call_prepare = nfs41_sequence_prepare,
4946 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4947 struct rpc_cred *cred)
4949 struct nfs4_sequence_args *args;
4950 struct nfs4_sequence_res *res;
4951 struct rpc_message msg = {
4952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4956 args = kzalloc(sizeof(*args), GFP_KERNEL);
4959 res = kzalloc(sizeof(*res), GFP_KERNEL);
4964 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4965 msg.rpc_argp = args;
4968 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4969 &nfs41_sequence_ops, (void *)clp);
4972 #endif /* CONFIG_NFS_V4_1 */
4974 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4975 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4976 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4977 .recover_open = nfs4_open_reclaim,
4978 .recover_lock = nfs4_lock_reclaim,
4979 .establish_clid = nfs4_init_clientid,
4980 .get_clid_cred = nfs4_get_setclientid_cred,
4983 #if defined(CONFIG_NFS_V4_1)
4984 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4985 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4986 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4987 .recover_open = nfs4_open_reclaim,
4988 .recover_lock = nfs4_lock_reclaim,
4989 .establish_clid = nfs41_init_clientid,
4990 .get_clid_cred = nfs4_get_exchange_id_cred,
4992 #endif /* CONFIG_NFS_V4_1 */
4994 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4995 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4996 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4997 .recover_open = nfs4_open_expired,
4998 .recover_lock = nfs4_lock_expired,
4999 .establish_clid = nfs4_init_clientid,
5000 .get_clid_cred = nfs4_get_setclientid_cred,
5003 #if defined(CONFIG_NFS_V4_1)
5004 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5005 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5006 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5007 .recover_open = nfs4_open_expired,
5008 .recover_lock = nfs4_lock_expired,
5009 .establish_clid = nfs41_init_clientid,
5010 .get_clid_cred = nfs4_get_exchange_id_cred,
5012 #endif /* CONFIG_NFS_V4_1 */
5014 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5015 .sched_state_renewal = nfs4_proc_async_renew,
5016 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5017 .renew_lease = nfs4_proc_renew,
5020 #if defined(CONFIG_NFS_V4_1)
5021 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5022 .sched_state_renewal = nfs41_proc_async_sequence,
5023 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5024 .renew_lease = nfs4_proc_sequence,
5029 * Per minor version reboot and network partition recovery ops
5032 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5033 &nfs40_reboot_recovery_ops,
5034 #if defined(CONFIG_NFS_V4_1)
5035 &nfs41_reboot_recovery_ops,
5039 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5040 &nfs40_nograce_recovery_ops,
5041 #if defined(CONFIG_NFS_V4_1)
5042 &nfs41_nograce_recovery_ops,
5046 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5047 &nfs40_state_renewal_ops,
5048 #if defined(CONFIG_NFS_V4_1)
5049 &nfs41_state_renewal_ops,
5053 static const struct inode_operations nfs4_file_inode_operations = {
5054 .permission = nfs_permission,
5055 .getattr = nfs_getattr,
5056 .setattr = nfs_setattr,
5057 .getxattr = nfs4_getxattr,
5058 .setxattr = nfs4_setxattr,
5059 .listxattr = nfs4_listxattr,
5062 const struct nfs_rpc_ops nfs_v4_clientops = {
5063 .version = 4, /* protocol version */
5064 .dentry_ops = &nfs4_dentry_operations,
5065 .dir_inode_ops = &nfs4_dir_inode_operations,
5066 .file_inode_ops = &nfs4_file_inode_operations,
5067 .getroot = nfs4_proc_get_root,
5068 .getattr = nfs4_proc_getattr,
5069 .setattr = nfs4_proc_setattr,
5070 .lookupfh = nfs4_proc_lookupfh,
5071 .lookup = nfs4_proc_lookup,
5072 .access = nfs4_proc_access,
5073 .readlink = nfs4_proc_readlink,
5074 .create = nfs4_proc_create,
5075 .remove = nfs4_proc_remove,
5076 .unlink_setup = nfs4_proc_unlink_setup,
5077 .unlink_done = nfs4_proc_unlink_done,
5078 .rename = nfs4_proc_rename,
5079 .link = nfs4_proc_link,
5080 .symlink = nfs4_proc_symlink,
5081 .mkdir = nfs4_proc_mkdir,
5082 .rmdir = nfs4_proc_remove,
5083 .readdir = nfs4_proc_readdir,
5084 .mknod = nfs4_proc_mknod,
5085 .statfs = nfs4_proc_statfs,
5086 .fsinfo = nfs4_proc_fsinfo,
5087 .pathconf = nfs4_proc_pathconf,
5088 .set_capabilities = nfs4_server_capabilities,
5089 .decode_dirent = nfs4_decode_dirent,
5090 .read_setup = nfs4_proc_read_setup,
5091 .read_done = nfs4_read_done,
5092 .write_setup = nfs4_proc_write_setup,
5093 .write_done = nfs4_write_done,
5094 .commit_setup = nfs4_proc_commit_setup,
5095 .commit_done = nfs4_commit_done,
5096 .lock = nfs4_proc_lock,
5097 .clear_acl_cache = nfs4_zap_acl_attr,
5098 .close_context = nfs4_close_context,