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_SETUP, &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_SETUP, &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_SETUP, &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 /* no restart, therefore free slot here */
648 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
649 struct nfs4_sequence_res *res,
652 nfs4_sequence_done(server, res, rpc_status);
653 nfs4_sequence_free_slot(server->nfs_client, res);
656 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
658 struct nfs_inode *nfsi = NFS_I(dir);
660 spin_lock(&dir->i_lock);
661 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
662 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
663 nfs_force_lookup_revalidate(dir);
664 nfsi->change_attr = cinfo->after;
665 spin_unlock(&dir->i_lock);
668 struct nfs4_opendata {
670 struct nfs_openargs o_arg;
671 struct nfs_openres o_res;
672 struct nfs_open_confirmargs c_arg;
673 struct nfs_open_confirmres c_res;
674 struct nfs_fattr f_attr;
675 struct nfs_fattr dir_attr;
678 struct nfs4_state_owner *owner;
679 struct nfs4_state *state;
681 unsigned long timestamp;
682 unsigned int rpc_done : 1;
688 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
690 p->o_res.f_attr = &p->f_attr;
691 p->o_res.dir_attr = &p->dir_attr;
692 p->o_res.seqid = p->o_arg.seqid;
693 p->c_res.seqid = p->c_arg.seqid;
694 p->o_res.server = p->o_arg.server;
695 nfs_fattr_init(&p->f_attr);
696 nfs_fattr_init(&p->dir_attr);
697 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
700 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
701 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
702 const struct iattr *attrs)
704 struct dentry *parent = dget_parent(path->dentry);
705 struct inode *dir = parent->d_inode;
706 struct nfs_server *server = NFS_SERVER(dir);
707 struct nfs4_opendata *p;
709 p = kzalloc(sizeof(*p), GFP_KERNEL);
712 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
713 if (p->o_arg.seqid == NULL)
715 p->path.mnt = mntget(path->mnt);
716 p->path.dentry = dget(path->dentry);
719 atomic_inc(&sp->so_count);
720 p->o_arg.fh = NFS_FH(dir);
721 p->o_arg.open_flags = flags;
722 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
723 p->o_arg.clientid = server->nfs_client->cl_clientid;
724 p->o_arg.id = sp->so_owner_id.id;
725 p->o_arg.name = &p->path.dentry->d_name;
726 p->o_arg.server = server;
727 p->o_arg.bitmask = server->attr_bitmask;
728 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
729 if (flags & O_EXCL) {
730 u32 *s = (u32 *) p->o_arg.u.verifier.data;
733 } else if (flags & O_CREAT) {
734 p->o_arg.u.attrs = &p->attrs;
735 memcpy(&p->attrs, attrs, sizeof(p->attrs));
737 p->c_arg.fh = &p->o_res.fh;
738 p->c_arg.stateid = &p->o_res.stateid;
739 p->c_arg.seqid = p->o_arg.seqid;
740 nfs4_init_opendata_res(p);
750 static void nfs4_opendata_free(struct kref *kref)
752 struct nfs4_opendata *p = container_of(kref,
753 struct nfs4_opendata, kref);
755 nfs_free_seqid(p->o_arg.seqid);
756 if (p->state != NULL)
757 nfs4_put_open_state(p->state);
758 nfs4_put_state_owner(p->owner);
764 static void nfs4_opendata_put(struct nfs4_opendata *p)
767 kref_put(&p->kref, nfs4_opendata_free);
770 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
774 ret = rpc_wait_for_completion_task(task);
778 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
782 if (open_mode & O_EXCL)
784 switch (mode & (FMODE_READ|FMODE_WRITE)) {
786 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
789 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
791 case FMODE_READ|FMODE_WRITE:
792 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
798 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
800 if ((delegation->type & fmode) != fmode)
802 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
804 nfs_mark_delegation_referenced(delegation);
808 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
817 case FMODE_READ|FMODE_WRITE:
820 nfs4_state_set_mode_locked(state, state->state | fmode);
823 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
825 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
826 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
827 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
830 set_bit(NFS_O_RDONLY_STATE, &state->flags);
833 set_bit(NFS_O_WRONLY_STATE, &state->flags);
835 case FMODE_READ|FMODE_WRITE:
836 set_bit(NFS_O_RDWR_STATE, &state->flags);
840 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
842 write_seqlock(&state->seqlock);
843 nfs_set_open_stateid_locked(state, stateid, fmode);
844 write_sequnlock(&state->seqlock);
847 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
850 * Protect the call to nfs4_state_set_mode_locked and
851 * serialise the stateid update
853 write_seqlock(&state->seqlock);
854 if (deleg_stateid != NULL) {
855 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
856 set_bit(NFS_DELEGATED_STATE, &state->flags);
858 if (open_stateid != NULL)
859 nfs_set_open_stateid_locked(state, open_stateid, fmode);
860 write_sequnlock(&state->seqlock);
861 spin_lock(&state->owner->so_lock);
862 update_open_stateflags(state, fmode);
863 spin_unlock(&state->owner->so_lock);
866 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
868 struct nfs_inode *nfsi = NFS_I(state->inode);
869 struct nfs_delegation *deleg_cur;
872 fmode &= (FMODE_READ|FMODE_WRITE);
875 deleg_cur = rcu_dereference(nfsi->delegation);
876 if (deleg_cur == NULL)
879 spin_lock(&deleg_cur->lock);
880 if (nfsi->delegation != deleg_cur ||
881 (deleg_cur->type & fmode) != fmode)
882 goto no_delegation_unlock;
884 if (delegation == NULL)
885 delegation = &deleg_cur->stateid;
886 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
887 goto no_delegation_unlock;
889 nfs_mark_delegation_referenced(deleg_cur);
890 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
892 no_delegation_unlock:
893 spin_unlock(&deleg_cur->lock);
897 if (!ret && open_stateid != NULL) {
898 __update_open_stateid(state, open_stateid, NULL, fmode);
906 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
908 struct nfs_delegation *delegation;
911 delegation = rcu_dereference(NFS_I(inode)->delegation);
912 if (delegation == NULL || (delegation->type & fmode) == fmode) {
917 nfs_inode_return_delegation(inode);
920 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
922 struct nfs4_state *state = opendata->state;
923 struct nfs_inode *nfsi = NFS_I(state->inode);
924 struct nfs_delegation *delegation;
925 int open_mode = opendata->o_arg.open_flags & O_EXCL;
926 fmode_t fmode = opendata->o_arg.fmode;
927 nfs4_stateid stateid;
931 if (can_open_cached(state, fmode, open_mode)) {
932 spin_lock(&state->owner->so_lock);
933 if (can_open_cached(state, fmode, open_mode)) {
934 update_open_stateflags(state, fmode);
935 spin_unlock(&state->owner->so_lock);
936 goto out_return_state;
938 spin_unlock(&state->owner->so_lock);
941 delegation = rcu_dereference(nfsi->delegation);
942 if (delegation == NULL ||
943 !can_open_delegated(delegation, fmode)) {
947 /* Save the delegation */
948 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
950 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
955 /* Try to update the stateid using the delegation */
956 if (update_open_stateid(state, NULL, &stateid, fmode))
957 goto out_return_state;
962 atomic_inc(&state->count);
966 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
969 struct nfs4_state *state = NULL;
970 struct nfs_delegation *delegation;
973 if (!data->rpc_done) {
974 state = nfs4_try_open_cached(data);
979 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
981 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
982 ret = PTR_ERR(inode);
986 state = nfs4_get_open_state(inode, data->owner);
989 if (data->o_res.delegation_type != 0) {
990 int delegation_flags = 0;
993 delegation = rcu_dereference(NFS_I(inode)->delegation);
995 delegation_flags = delegation->flags;
997 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
998 nfs_inode_set_delegation(state->inode,
999 data->owner->so_cred,
1002 nfs_inode_reclaim_delegation(state->inode,
1003 data->owner->so_cred,
1007 update_open_stateid(state, &data->o_res.stateid, NULL,
1015 return ERR_PTR(ret);
1018 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1020 struct nfs_inode *nfsi = NFS_I(state->inode);
1021 struct nfs_open_context *ctx;
1023 spin_lock(&state->inode->i_lock);
1024 list_for_each_entry(ctx, &nfsi->open_files, list) {
1025 if (ctx->state != state)
1027 get_nfs_open_context(ctx);
1028 spin_unlock(&state->inode->i_lock);
1031 spin_unlock(&state->inode->i_lock);
1032 return ERR_PTR(-ENOENT);
1035 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1037 struct nfs4_opendata *opendata;
1039 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1040 if (opendata == NULL)
1041 return ERR_PTR(-ENOMEM);
1042 opendata->state = state;
1043 atomic_inc(&state->count);
1047 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1049 struct nfs4_state *newstate;
1052 opendata->o_arg.open_flags = 0;
1053 opendata->o_arg.fmode = fmode;
1054 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1055 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1056 nfs4_init_opendata_res(opendata);
1057 ret = _nfs4_proc_open(opendata);
1060 newstate = nfs4_opendata_to_nfs4_state(opendata);
1061 if (IS_ERR(newstate))
1062 return PTR_ERR(newstate);
1063 nfs4_close_state(&opendata->path, newstate, fmode);
1068 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1070 struct nfs4_state *newstate;
1073 /* memory barrier prior to reading state->n_* */
1074 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1076 if (state->n_rdwr != 0) {
1077 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1080 if (newstate != state)
1083 if (state->n_wronly != 0) {
1084 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1087 if (newstate != state)
1090 if (state->n_rdonly != 0) {
1091 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1094 if (newstate != state)
1098 * We may have performed cached opens for all three recoveries.
1099 * Check if we need to update the current stateid.
1101 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1102 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1103 write_seqlock(&state->seqlock);
1104 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1105 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1106 write_sequnlock(&state->seqlock);
1113 * reclaim state on the server after a reboot.
1115 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1117 struct nfs_delegation *delegation;
1118 struct nfs4_opendata *opendata;
1119 fmode_t delegation_type = 0;
1122 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1123 if (IS_ERR(opendata))
1124 return PTR_ERR(opendata);
1125 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1126 opendata->o_arg.fh = NFS_FH(state->inode);
1128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1129 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1130 delegation_type = delegation->type;
1132 opendata->o_arg.u.delegation_type = delegation_type;
1133 status = nfs4_open_recover(opendata, state);
1134 nfs4_opendata_put(opendata);
1138 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1140 struct nfs_server *server = NFS_SERVER(state->inode);
1141 struct nfs4_exception exception = { };
1144 err = _nfs4_do_open_reclaim(ctx, state);
1145 if (err != -NFS4ERR_DELAY)
1147 nfs4_handle_exception(server, err, &exception);
1148 } while (exception.retry);
1152 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1154 struct nfs_open_context *ctx;
1157 ctx = nfs4_state_find_open_context(state);
1159 return PTR_ERR(ctx);
1160 ret = nfs4_do_open_reclaim(ctx, state);
1161 put_nfs_open_context(ctx);
1165 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1167 struct nfs4_opendata *opendata;
1170 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1171 if (IS_ERR(opendata))
1172 return PTR_ERR(opendata);
1173 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1174 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1175 sizeof(opendata->o_arg.u.delegation.data));
1176 ret = nfs4_open_recover(opendata, state);
1177 nfs4_opendata_put(opendata);
1181 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1183 struct nfs4_exception exception = { };
1184 struct nfs_server *server = NFS_SERVER(state->inode);
1187 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1193 case -NFS4ERR_STALE_CLIENTID:
1194 case -NFS4ERR_STALE_STATEID:
1195 case -NFS4ERR_EXPIRED:
1196 /* Don't recall a delegation if it was lost */
1197 nfs4_schedule_state_recovery(server->nfs_client);
1201 * The show must go on: exit, but mark the
1202 * stateid as needing recovery.
1204 case -NFS4ERR_ADMIN_REVOKED:
1205 case -NFS4ERR_BAD_STATEID:
1206 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1211 err = nfs4_handle_exception(server, err, &exception);
1212 } while (exception.retry);
1217 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1219 struct nfs4_opendata *data = calldata;
1221 data->rpc_status = task->tk_status;
1222 if (RPC_ASSASSINATED(task))
1224 if (data->rpc_status == 0) {
1225 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1226 sizeof(data->o_res.stateid.data));
1227 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1228 renew_lease(data->o_res.server, data->timestamp);
1233 static void nfs4_open_confirm_release(void *calldata)
1235 struct nfs4_opendata *data = calldata;
1236 struct nfs4_state *state = NULL;
1238 /* If this request hasn't been cancelled, do nothing */
1239 if (data->cancelled == 0)
1241 /* In case of error, no cleanup! */
1242 if (!data->rpc_done)
1244 state = nfs4_opendata_to_nfs4_state(data);
1246 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1248 nfs4_opendata_put(data);
1251 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1252 .rpc_call_done = nfs4_open_confirm_done,
1253 .rpc_release = nfs4_open_confirm_release,
1257 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1259 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1261 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1262 struct rpc_task *task;
1263 struct rpc_message msg = {
1264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1265 .rpc_argp = &data->c_arg,
1266 .rpc_resp = &data->c_res,
1267 .rpc_cred = data->owner->so_cred,
1269 struct rpc_task_setup task_setup_data = {
1270 .rpc_client = server->client,
1271 .rpc_message = &msg,
1272 .callback_ops = &nfs4_open_confirm_ops,
1273 .callback_data = data,
1274 .workqueue = nfsiod_workqueue,
1275 .flags = RPC_TASK_ASYNC,
1279 kref_get(&data->kref);
1281 data->rpc_status = 0;
1282 data->timestamp = jiffies;
1283 task = rpc_run_task(&task_setup_data);
1285 return PTR_ERR(task);
1286 status = nfs4_wait_for_completion_rpc_task(task);
1288 data->cancelled = 1;
1291 status = data->rpc_status;
1296 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1298 struct nfs4_opendata *data = calldata;
1299 struct nfs4_state_owner *sp = data->owner;
1301 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1304 * Check if we still need to send an OPEN call, or if we can use
1305 * a delegation instead.
1307 if (data->state != NULL) {
1308 struct nfs_delegation *delegation;
1310 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1313 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1314 if (delegation != NULL &&
1315 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1321 /* Update sequence id. */
1322 data->o_arg.id = sp->so_owner_id.id;
1323 data->o_arg.clientid = sp->so_client->cl_clientid;
1324 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1325 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1326 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1328 data->timestamp = jiffies;
1329 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1330 &data->o_arg.seq_args,
1331 &data->o_res.seq_res, 1, task))
1333 rpc_call_start(task);
1336 task->tk_action = NULL;
1340 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1342 struct nfs4_opendata *data = calldata;
1344 data->rpc_status = task->tk_status;
1346 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1349 if (RPC_ASSASSINATED(task))
1351 if (task->tk_status == 0) {
1352 switch (data->o_res.f_attr->mode & S_IFMT) {
1356 data->rpc_status = -ELOOP;
1359 data->rpc_status = -EISDIR;
1362 data->rpc_status = -ENOTDIR;
1364 renew_lease(data->o_res.server, data->timestamp);
1365 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1366 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1371 static void nfs4_open_release(void *calldata)
1373 struct nfs4_opendata *data = calldata;
1374 struct nfs4_state *state = NULL;
1376 /* If this request hasn't been cancelled, do nothing */
1377 if (data->cancelled == 0)
1379 /* In case of error, no cleanup! */
1380 if (data->rpc_status != 0 || !data->rpc_done)
1382 /* In case we need an open_confirm, no cleanup! */
1383 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1385 state = nfs4_opendata_to_nfs4_state(data);
1387 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1389 nfs4_opendata_put(data);
1392 static const struct rpc_call_ops nfs4_open_ops = {
1393 .rpc_call_prepare = nfs4_open_prepare,
1394 .rpc_call_done = nfs4_open_done,
1395 .rpc_release = nfs4_open_release,
1399 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1401 static int _nfs4_proc_open(struct nfs4_opendata *data)
1403 struct inode *dir = data->dir->d_inode;
1404 struct nfs_server *server = NFS_SERVER(dir);
1405 struct nfs_openargs *o_arg = &data->o_arg;
1406 struct nfs_openres *o_res = &data->o_res;
1407 struct rpc_task *task;
1408 struct rpc_message msg = {
1409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1412 .rpc_cred = data->owner->so_cred,
1414 struct rpc_task_setup task_setup_data = {
1415 .rpc_client = server->client,
1416 .rpc_message = &msg,
1417 .callback_ops = &nfs4_open_ops,
1418 .callback_data = data,
1419 .workqueue = nfsiod_workqueue,
1420 .flags = RPC_TASK_ASYNC,
1424 kref_get(&data->kref);
1426 data->rpc_status = 0;
1427 data->cancelled = 0;
1428 task = rpc_run_task(&task_setup_data);
1430 return PTR_ERR(task);
1431 status = nfs4_wait_for_completion_rpc_task(task);
1433 data->cancelled = 1;
1436 status = data->rpc_status;
1438 if (status != 0 || !data->rpc_done)
1441 if (o_res->fh.size == 0)
1442 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1444 if (o_arg->open_flags & O_CREAT) {
1445 update_changeattr(dir, &o_res->cinfo);
1446 nfs_post_op_update_inode(dir, o_res->dir_attr);
1448 nfs_refresh_inode(dir, o_res->dir_attr);
1449 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1450 status = _nfs4_proc_open_confirm(data);
1454 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1455 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1459 static int nfs4_recover_expired_lease(struct nfs_server *server)
1461 struct nfs_client *clp = server->nfs_client;
1465 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1466 ret = nfs4_wait_clnt_recover(clp);
1469 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1470 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1472 nfs4_schedule_state_recovery(clp);
1480 * reclaim state on the server after a network partition.
1481 * Assumes caller holds the appropriate lock
1483 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1485 struct nfs4_opendata *opendata;
1488 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1489 if (IS_ERR(opendata))
1490 return PTR_ERR(opendata);
1491 ret = nfs4_open_recover(opendata, state);
1493 d_drop(ctx->path.dentry);
1494 nfs4_opendata_put(opendata);
1498 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1500 struct nfs_server *server = NFS_SERVER(state->inode);
1501 struct nfs4_exception exception = { };
1505 err = _nfs4_open_expired(ctx, state);
1506 if (err != -NFS4ERR_DELAY)
1508 nfs4_handle_exception(server, err, &exception);
1509 } while (exception.retry);
1513 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1515 struct nfs_open_context *ctx;
1518 ctx = nfs4_state_find_open_context(state);
1520 return PTR_ERR(ctx);
1521 ret = nfs4_do_open_expired(ctx, state);
1522 put_nfs_open_context(ctx);
1527 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1528 * fields corresponding to attributes that were used to store the verifier.
1529 * Make sure we clobber those fields in the later setattr call
1531 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1533 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1534 !(sattr->ia_valid & ATTR_ATIME_SET))
1535 sattr->ia_valid |= ATTR_ATIME;
1537 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1538 !(sattr->ia_valid & ATTR_MTIME_SET))
1539 sattr->ia_valid |= ATTR_MTIME;
1543 * Returns a referenced nfs4_state
1545 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)
1547 struct nfs4_state_owner *sp;
1548 struct nfs4_state *state = NULL;
1549 struct nfs_server *server = NFS_SERVER(dir);
1550 struct nfs4_opendata *opendata;
1553 /* Protect against reboot recovery conflicts */
1555 if (!(sp = nfs4_get_state_owner(server, cred))) {
1556 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1559 status = nfs4_recover_expired_lease(server);
1561 goto err_put_state_owner;
1562 if (path->dentry->d_inode != NULL)
1563 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1565 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1566 if (opendata == NULL)
1567 goto err_put_state_owner;
1569 if (path->dentry->d_inode != NULL)
1570 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1572 status = _nfs4_proc_open(opendata);
1574 goto err_opendata_put;
1576 if (opendata->o_arg.open_flags & O_EXCL)
1577 nfs4_exclusive_attrset(opendata, sattr);
1579 state = nfs4_opendata_to_nfs4_state(opendata);
1580 status = PTR_ERR(state);
1582 goto err_opendata_put;
1583 nfs4_opendata_put(opendata);
1584 nfs4_put_state_owner(sp);
1588 nfs4_opendata_put(opendata);
1589 err_put_state_owner:
1590 nfs4_put_state_owner(sp);
1597 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)
1599 struct nfs4_exception exception = { };
1600 struct nfs4_state *res;
1604 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1607 /* NOTE: BAD_SEQID means the server and client disagree about the
1608 * book-keeping w.r.t. state-changing operations
1609 * (OPEN/CLOSE/LOCK/LOCKU...)
1610 * It is actually a sign of a bug on the client or on the server.
1612 * If we receive a BAD_SEQID error in the particular case of
1613 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1614 * have unhashed the old state_owner for us, and that we can
1615 * therefore safely retry using a new one. We should still warn
1616 * the user though...
1618 if (status == -NFS4ERR_BAD_SEQID) {
1619 printk(KERN_WARNING "NFS: v4 server %s "
1620 " returned a bad sequence-id error!\n",
1621 NFS_SERVER(dir)->nfs_client->cl_hostname);
1622 exception.retry = 1;
1626 * BAD_STATEID on OPEN means that the server cancelled our
1627 * state before it received the OPEN_CONFIRM.
1628 * Recover by retrying the request as per the discussion
1629 * on Page 181 of RFC3530.
1631 if (status == -NFS4ERR_BAD_STATEID) {
1632 exception.retry = 1;
1635 if (status == -EAGAIN) {
1636 /* We must have found a delegation */
1637 exception.retry = 1;
1640 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1641 status, &exception));
1642 } while (exception.retry);
1646 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1647 struct nfs_fattr *fattr, struct iattr *sattr,
1648 struct nfs4_state *state)
1650 struct nfs_server *server = NFS_SERVER(inode);
1651 struct nfs_setattrargs arg = {
1652 .fh = NFS_FH(inode),
1655 .bitmask = server->attr_bitmask,
1657 struct nfs_setattrres res = {
1661 struct rpc_message msg = {
1662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1667 unsigned long timestamp = jiffies;
1670 nfs_fattr_init(fattr);
1672 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1673 /* Use that stateid */
1674 } else if (state != NULL) {
1675 nfs4_copy_stateid(&arg.stateid, state, current->files);
1677 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1679 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1680 if (status == 0 && state != NULL)
1681 renew_lease(server, timestamp);
1685 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1686 struct nfs_fattr *fattr, struct iattr *sattr,
1687 struct nfs4_state *state)
1689 struct nfs_server *server = NFS_SERVER(inode);
1690 struct nfs4_exception exception = { };
1693 err = nfs4_handle_exception(server,
1694 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1696 } while (exception.retry);
1700 struct nfs4_closedata {
1702 struct inode *inode;
1703 struct nfs4_state *state;
1704 struct nfs_closeargs arg;
1705 struct nfs_closeres res;
1706 struct nfs_fattr fattr;
1707 unsigned long timestamp;
1710 static void nfs4_free_closedata(void *data)
1712 struct nfs4_closedata *calldata = data;
1713 struct nfs4_state_owner *sp = calldata->state->owner;
1715 nfs4_put_open_state(calldata->state);
1716 nfs_free_seqid(calldata->arg.seqid);
1717 nfs4_put_state_owner(sp);
1718 path_put(&calldata->path);
1722 static void nfs4_close_done(struct rpc_task *task, void *data)
1724 struct nfs4_closedata *calldata = data;
1725 struct nfs4_state *state = calldata->state;
1726 struct nfs_server *server = NFS_SERVER(calldata->inode);
1728 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1729 if (RPC_ASSASSINATED(task))
1731 /* hmm. we are done with the inode, and in the process of freeing
1732 * the state_owner. we keep this around to process errors
1734 switch (task->tk_status) {
1736 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1737 renew_lease(server, calldata->timestamp);
1739 case -NFS4ERR_STALE_STATEID:
1740 case -NFS4ERR_OLD_STATEID:
1741 case -NFS4ERR_BAD_STATEID:
1742 case -NFS4ERR_EXPIRED:
1743 if (calldata->arg.fmode == 0)
1746 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1747 nfs4_restart_rpc(task, server->nfs_client);
1751 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1752 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1755 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1757 struct nfs4_closedata *calldata = data;
1758 struct nfs4_state *state = calldata->state;
1759 int clear_rd, clear_wr, clear_rdwr;
1761 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1764 clear_rd = clear_wr = clear_rdwr = 0;
1765 spin_lock(&state->owner->so_lock);
1766 /* Calculate the change in open mode */
1767 if (state->n_rdwr == 0) {
1768 if (state->n_rdonly == 0) {
1769 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1770 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1772 if (state->n_wronly == 0) {
1773 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1774 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1777 spin_unlock(&state->owner->so_lock);
1778 if (!clear_rd && !clear_wr && !clear_rdwr) {
1779 /* Note: exit _without_ calling nfs4_close_done */
1780 task->tk_action = NULL;
1783 nfs_fattr_init(calldata->res.fattr);
1784 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1785 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1786 calldata->arg.fmode = FMODE_READ;
1787 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1788 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1789 calldata->arg.fmode = FMODE_WRITE;
1791 calldata->timestamp = jiffies;
1792 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1793 &calldata->arg.seq_args, &calldata->res.seq_res,
1796 rpc_call_start(task);
1799 static const struct rpc_call_ops nfs4_close_ops = {
1800 .rpc_call_prepare = nfs4_close_prepare,
1801 .rpc_call_done = nfs4_close_done,
1802 .rpc_release = nfs4_free_closedata,
1806 * It is possible for data to be read/written from a mem-mapped file
1807 * after the sys_close call (which hits the vfs layer as a flush).
1808 * This means that we can't safely call nfsv4 close on a file until
1809 * the inode is cleared. This in turn means that we are not good
1810 * NFSv4 citizens - we do not indicate to the server to update the file's
1811 * share state even when we are done with one of the three share
1812 * stateid's in the inode.
1814 * NOTE: Caller must be holding the sp->so_owner semaphore!
1816 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1818 struct nfs_server *server = NFS_SERVER(state->inode);
1819 struct nfs4_closedata *calldata;
1820 struct nfs4_state_owner *sp = state->owner;
1821 struct rpc_task *task;
1822 struct rpc_message msg = {
1823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1824 .rpc_cred = state->owner->so_cred,
1826 struct rpc_task_setup task_setup_data = {
1827 .rpc_client = server->client,
1828 .rpc_message = &msg,
1829 .callback_ops = &nfs4_close_ops,
1830 .workqueue = nfsiod_workqueue,
1831 .flags = RPC_TASK_ASYNC,
1833 int status = -ENOMEM;
1835 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1836 if (calldata == NULL)
1838 calldata->inode = state->inode;
1839 calldata->state = state;
1840 calldata->arg.fh = NFS_FH(state->inode);
1841 calldata->arg.stateid = &state->open_stateid;
1842 if (nfs4_has_session(server->nfs_client))
1843 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1844 /* Serialization for the sequence id */
1845 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1846 if (calldata->arg.seqid == NULL)
1847 goto out_free_calldata;
1848 calldata->arg.fmode = 0;
1849 calldata->arg.bitmask = server->cache_consistency_bitmask;
1850 calldata->res.fattr = &calldata->fattr;
1851 calldata->res.seqid = calldata->arg.seqid;
1852 calldata->res.server = server;
1853 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1854 calldata->path.mnt = mntget(path->mnt);
1855 calldata->path.dentry = dget(path->dentry);
1857 msg.rpc_argp = &calldata->arg,
1858 msg.rpc_resp = &calldata->res,
1859 task_setup_data.callback_data = calldata;
1860 task = rpc_run_task(&task_setup_data);
1862 return PTR_ERR(task);
1865 status = rpc_wait_for_completion_task(task);
1871 nfs4_put_open_state(state);
1872 nfs4_put_state_owner(sp);
1876 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1881 /* If the open_intent is for execute, we have an extra check to make */
1882 if (fmode & FMODE_EXEC) {
1883 ret = nfs_may_open(state->inode,
1884 state->owner->so_cred,
1885 nd->intent.open.flags);
1889 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1890 if (!IS_ERR(filp)) {
1891 struct nfs_open_context *ctx;
1892 ctx = nfs_file_open_context(filp);
1896 ret = PTR_ERR(filp);
1898 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1903 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1905 struct path path = {
1906 .mnt = nd->path.mnt,
1909 struct dentry *parent;
1911 struct rpc_cred *cred;
1912 struct nfs4_state *state;
1914 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1916 if (nd->flags & LOOKUP_CREATE) {
1917 attr.ia_mode = nd->intent.open.create_mode;
1918 attr.ia_valid = ATTR_MODE;
1919 if (!IS_POSIXACL(dir))
1920 attr.ia_mode &= ~current_umask();
1923 BUG_ON(nd->intent.open.flags & O_CREAT);
1926 cred = rpc_lookup_cred();
1928 return (struct dentry *)cred;
1929 parent = dentry->d_parent;
1930 /* Protect against concurrent sillydeletes */
1931 nfs_block_sillyrename(parent);
1932 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1934 if (IS_ERR(state)) {
1935 if (PTR_ERR(state) == -ENOENT) {
1936 d_add(dentry, NULL);
1937 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1939 nfs_unblock_sillyrename(parent);
1940 return (struct dentry *)state;
1942 res = d_add_unique(dentry, igrab(state->inode));
1945 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1946 nfs_unblock_sillyrename(parent);
1947 nfs4_intent_set_file(nd, &path, state, fmode);
1952 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1954 struct path path = {
1955 .mnt = nd->path.mnt,
1958 struct rpc_cred *cred;
1959 struct nfs4_state *state;
1960 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1962 cred = rpc_lookup_cred();
1964 return PTR_ERR(cred);
1965 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1967 if (IS_ERR(state)) {
1968 switch (PTR_ERR(state)) {
1974 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1980 if (state->inode == dentry->d_inode) {
1981 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1982 nfs4_intent_set_file(nd, &path, state, fmode);
1985 nfs4_close_sync(&path, state, fmode);
1991 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1993 if (ctx->state == NULL)
1996 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1998 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2001 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2003 struct nfs4_server_caps_arg args = {
2006 struct nfs4_server_caps_res res = {};
2007 struct rpc_message msg = {
2008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2014 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2016 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2017 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2018 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2019 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2020 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2021 NFS_CAP_CTIME|NFS_CAP_MTIME);
2022 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2023 server->caps |= NFS_CAP_ACLS;
2024 if (res.has_links != 0)
2025 server->caps |= NFS_CAP_HARDLINKS;
2026 if (res.has_symlinks != 0)
2027 server->caps |= NFS_CAP_SYMLINKS;
2028 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2029 server->caps |= NFS_CAP_FILEID;
2030 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2031 server->caps |= NFS_CAP_MODE;
2032 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2033 server->caps |= NFS_CAP_NLINK;
2034 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2035 server->caps |= NFS_CAP_OWNER;
2036 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2037 server->caps |= NFS_CAP_OWNER_GROUP;
2038 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2039 server->caps |= NFS_CAP_ATIME;
2040 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2041 server->caps |= NFS_CAP_CTIME;
2042 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2043 server->caps |= NFS_CAP_MTIME;
2045 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2046 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2047 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2048 server->acl_bitmask = res.acl_bitmask;
2054 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2056 struct nfs4_exception exception = { };
2059 err = nfs4_handle_exception(server,
2060 _nfs4_server_capabilities(server, fhandle),
2062 } while (exception.retry);
2066 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2067 struct nfs_fsinfo *info)
2069 struct nfs4_lookup_root_arg args = {
2070 .bitmask = nfs4_fattr_bitmap,
2072 struct nfs4_lookup_res res = {
2074 .fattr = info->fattr,
2077 struct rpc_message msg = {
2078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2083 nfs_fattr_init(info->fattr);
2084 return nfs4_call_sync(server, &msg, &args, &res, 0);
2087 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2088 struct nfs_fsinfo *info)
2090 struct nfs4_exception exception = { };
2093 err = nfs4_handle_exception(server,
2094 _nfs4_lookup_root(server, fhandle, info),
2096 } while (exception.retry);
2101 * get the file handle for the "/" directory on the server
2103 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2104 struct nfs_fsinfo *info)
2108 status = nfs4_lookup_root(server, fhandle, info);
2110 status = nfs4_server_capabilities(server, fhandle);
2112 status = nfs4_do_fsinfo(server, fhandle, info);
2113 return nfs4_map_errors(status);
2117 * Get locations and (maybe) other attributes of a referral.
2118 * Note that we'll actually follow the referral later when
2119 * we detect fsid mismatch in inode revalidation
2121 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2123 int status = -ENOMEM;
2124 struct page *page = NULL;
2125 struct nfs4_fs_locations *locations = NULL;
2127 page = alloc_page(GFP_KERNEL);
2130 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2131 if (locations == NULL)
2134 status = nfs4_proc_fs_locations(dir, name, locations, page);
2137 /* Make sure server returned a different fsid for the referral */
2138 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2139 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2144 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2145 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2147 fattr->mode = S_IFDIR;
2148 memset(fhandle, 0, sizeof(struct nfs_fh));
2157 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2159 struct nfs4_getattr_arg args = {
2161 .bitmask = server->attr_bitmask,
2163 struct nfs4_getattr_res res = {
2167 struct rpc_message msg = {
2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2173 nfs_fattr_init(fattr);
2174 return nfs4_call_sync(server, &msg, &args, &res, 0);
2177 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2179 struct nfs4_exception exception = { };
2182 err = nfs4_handle_exception(server,
2183 _nfs4_proc_getattr(server, fhandle, fattr),
2185 } while (exception.retry);
2190 * The file is not closed if it is opened due to the a request to change
2191 * the size of the file. The open call will not be needed once the
2192 * VFS layer lookup-intents are implemented.
2194 * Close is called when the inode is destroyed.
2195 * If we haven't opened the file for O_WRONLY, we
2196 * need to in the size_change case to obtain a stateid.
2199 * Because OPEN is always done by name in nfsv4, it is
2200 * possible that we opened a different file by the same
2201 * name. We can recognize this race condition, but we
2202 * can't do anything about it besides returning an error.
2204 * This will be fixed with VFS changes (lookup-intent).
2207 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2208 struct iattr *sattr)
2210 struct inode *inode = dentry->d_inode;
2211 struct rpc_cred *cred = NULL;
2212 struct nfs4_state *state = NULL;
2215 nfs_fattr_init(fattr);
2217 /* Search for an existing open(O_WRITE) file */
2218 if (sattr->ia_valid & ATTR_FILE) {
2219 struct nfs_open_context *ctx;
2221 ctx = nfs_file_open_context(sattr->ia_file);
2228 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2230 nfs_setattr_update_inode(inode, sattr);
2234 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2235 const struct qstr *name, struct nfs_fh *fhandle,
2236 struct nfs_fattr *fattr)
2239 struct nfs4_lookup_arg args = {
2240 .bitmask = server->attr_bitmask,
2244 struct nfs4_lookup_res res = {
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2255 nfs_fattr_init(fattr);
2257 dprintk("NFS call lookupfh %s\n", name->name);
2258 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2259 dprintk("NFS reply lookupfh: %d\n", status);
2263 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2264 struct qstr *name, struct nfs_fh *fhandle,
2265 struct nfs_fattr *fattr)
2267 struct nfs4_exception exception = { };
2270 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2272 if (err == -NFS4ERR_MOVED) {
2276 err = nfs4_handle_exception(server, err, &exception);
2277 } while (exception.retry);
2281 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2282 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2286 dprintk("NFS call lookup %s\n", name->name);
2287 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2288 if (status == -NFS4ERR_MOVED)
2289 status = nfs4_get_referral(dir, name, fattr, fhandle);
2290 dprintk("NFS reply lookup: %d\n", status);
2294 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2296 struct nfs4_exception exception = { };
2299 err = nfs4_handle_exception(NFS_SERVER(dir),
2300 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2302 } while (exception.retry);
2306 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2308 struct nfs_server *server = NFS_SERVER(inode);
2309 struct nfs_fattr fattr;
2310 struct nfs4_accessargs args = {
2311 .fh = NFS_FH(inode),
2312 .bitmask = server->attr_bitmask,
2314 struct nfs4_accessres res = {
2318 struct rpc_message msg = {
2319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2322 .rpc_cred = entry->cred,
2324 int mode = entry->mask;
2328 * Determine which access bits we want to ask for...
2330 if (mode & MAY_READ)
2331 args.access |= NFS4_ACCESS_READ;
2332 if (S_ISDIR(inode->i_mode)) {
2333 if (mode & MAY_WRITE)
2334 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2335 if (mode & MAY_EXEC)
2336 args.access |= NFS4_ACCESS_LOOKUP;
2338 if (mode & MAY_WRITE)
2339 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2340 if (mode & MAY_EXEC)
2341 args.access |= NFS4_ACCESS_EXECUTE;
2343 nfs_fattr_init(&fattr);
2344 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2347 if (res.access & NFS4_ACCESS_READ)
2348 entry->mask |= MAY_READ;
2349 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2350 entry->mask |= MAY_WRITE;
2351 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2352 entry->mask |= MAY_EXEC;
2353 nfs_refresh_inode(inode, &fattr);
2358 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2360 struct nfs4_exception exception = { };
2363 err = nfs4_handle_exception(NFS_SERVER(inode),
2364 _nfs4_proc_access(inode, entry),
2366 } while (exception.retry);
2371 * TODO: For the time being, we don't try to get any attributes
2372 * along with any of the zero-copy operations READ, READDIR,
2375 * In the case of the first three, we want to put the GETATTR
2376 * after the read-type operation -- this is because it is hard
2377 * to predict the length of a GETATTR response in v4, and thus
2378 * align the READ data correctly. This means that the GETATTR
2379 * may end up partially falling into the page cache, and we should
2380 * shift it into the 'tail' of the xdr_buf before processing.
2381 * To do this efficiently, we need to know the total length
2382 * of data received, which doesn't seem to be available outside
2385 * In the case of WRITE, we also want to put the GETATTR after
2386 * the operation -- in this case because we want to make sure
2387 * we get the post-operation mtime and size. This means that
2388 * we can't use xdr_encode_pages() as written: we need a variant
2389 * of it which would leave room in the 'tail' iovec.
2391 * Both of these changes to the XDR layer would in fact be quite
2392 * minor, but I decided to leave them for a subsequent patch.
2394 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2395 unsigned int pgbase, unsigned int pglen)
2397 struct nfs4_readlink args = {
2398 .fh = NFS_FH(inode),
2403 struct nfs4_readlink_res res;
2404 struct rpc_message msg = {
2405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2410 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2413 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2414 unsigned int pgbase, unsigned int pglen)
2416 struct nfs4_exception exception = { };
2419 err = nfs4_handle_exception(NFS_SERVER(inode),
2420 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2422 } while (exception.retry);
2428 * We will need to arrange for the VFS layer to provide an atomic open.
2429 * Until then, this create/open method is prone to inefficiency and race
2430 * conditions due to the lookup, create, and open VFS calls from sys_open()
2431 * placed on the wire.
2433 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2434 * The file will be opened again in the subsequent VFS open call
2435 * (nfs4_proc_file_open).
2437 * The open for read will just hang around to be used by any process that
2438 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2442 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2443 int flags, struct nameidata *nd)
2445 struct path path = {
2446 .mnt = nd->path.mnt,
2449 struct nfs4_state *state;
2450 struct rpc_cred *cred;
2451 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2454 cred = rpc_lookup_cred();
2456 status = PTR_ERR(cred);
2459 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2461 if (IS_ERR(state)) {
2462 status = PTR_ERR(state);
2465 d_add(dentry, igrab(state->inode));
2466 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2467 if (flags & O_EXCL) {
2468 struct nfs_fattr fattr;
2469 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2471 nfs_setattr_update_inode(state->inode, sattr);
2472 nfs_post_op_update_inode(state->inode, &fattr);
2474 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2475 status = nfs4_intent_set_file(nd, &path, state, fmode);
2477 nfs4_close_sync(&path, state, fmode);
2484 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2486 struct nfs_server *server = NFS_SERVER(dir);
2487 struct nfs_removeargs args = {
2489 .name.len = name->len,
2490 .name.name = name->name,
2491 .bitmask = server->attr_bitmask,
2493 struct nfs_removeres res = {
2496 struct rpc_message msg = {
2497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2503 nfs_fattr_init(&res.dir_attr);
2504 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2506 update_changeattr(dir, &res.cinfo);
2507 nfs_post_op_update_inode(dir, &res.dir_attr);
2512 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2514 struct nfs4_exception exception = { };
2517 err = nfs4_handle_exception(NFS_SERVER(dir),
2518 _nfs4_proc_remove(dir, name),
2520 } while (exception.retry);
2524 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2526 struct nfs_server *server = NFS_SERVER(dir);
2527 struct nfs_removeargs *args = msg->rpc_argp;
2528 struct nfs_removeres *res = msg->rpc_resp;
2530 args->bitmask = server->cache_consistency_bitmask;
2531 res->server = server;
2532 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2535 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2537 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2539 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2540 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2542 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2543 update_changeattr(dir, &res->cinfo);
2544 nfs_post_op_update_inode(dir, &res->dir_attr);
2548 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2549 struct inode *new_dir, struct qstr *new_name)
2551 struct nfs_server *server = NFS_SERVER(old_dir);
2552 struct nfs4_rename_arg arg = {
2553 .old_dir = NFS_FH(old_dir),
2554 .new_dir = NFS_FH(new_dir),
2555 .old_name = old_name,
2556 .new_name = new_name,
2557 .bitmask = server->attr_bitmask,
2559 struct nfs_fattr old_fattr, new_fattr;
2560 struct nfs4_rename_res res = {
2562 .old_fattr = &old_fattr,
2563 .new_fattr = &new_fattr,
2565 struct rpc_message msg = {
2566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2572 nfs_fattr_init(res.old_fattr);
2573 nfs_fattr_init(res.new_fattr);
2574 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2577 update_changeattr(old_dir, &res.old_cinfo);
2578 nfs_post_op_update_inode(old_dir, res.old_fattr);
2579 update_changeattr(new_dir, &res.new_cinfo);
2580 nfs_post_op_update_inode(new_dir, res.new_fattr);
2585 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2586 struct inode *new_dir, struct qstr *new_name)
2588 struct nfs4_exception exception = { };
2591 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2592 _nfs4_proc_rename(old_dir, old_name,
2595 } while (exception.retry);
2599 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2601 struct nfs_server *server = NFS_SERVER(inode);
2602 struct nfs4_link_arg arg = {
2603 .fh = NFS_FH(inode),
2604 .dir_fh = NFS_FH(dir),
2606 .bitmask = server->attr_bitmask,
2608 struct nfs_fattr fattr, dir_attr;
2609 struct nfs4_link_res res = {
2612 .dir_attr = &dir_attr,
2614 struct rpc_message msg = {
2615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2621 nfs_fattr_init(res.fattr);
2622 nfs_fattr_init(res.dir_attr);
2623 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2625 update_changeattr(dir, &res.cinfo);
2626 nfs_post_op_update_inode(dir, res.dir_attr);
2627 nfs_post_op_update_inode(inode, res.fattr);
2633 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2635 struct nfs4_exception exception = { };
2638 err = nfs4_handle_exception(NFS_SERVER(inode),
2639 _nfs4_proc_link(inode, dir, name),
2641 } while (exception.retry);
2645 struct nfs4_createdata {
2646 struct rpc_message msg;
2647 struct nfs4_create_arg arg;
2648 struct nfs4_create_res res;
2650 struct nfs_fattr fattr;
2651 struct nfs_fattr dir_fattr;
2654 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2655 struct qstr *name, struct iattr *sattr, u32 ftype)
2657 struct nfs4_createdata *data;
2659 data = kzalloc(sizeof(*data), GFP_KERNEL);
2661 struct nfs_server *server = NFS_SERVER(dir);
2663 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2664 data->msg.rpc_argp = &data->arg;
2665 data->msg.rpc_resp = &data->res;
2666 data->arg.dir_fh = NFS_FH(dir);
2667 data->arg.server = server;
2668 data->arg.name = name;
2669 data->arg.attrs = sattr;
2670 data->arg.ftype = ftype;
2671 data->arg.bitmask = server->attr_bitmask;
2672 data->res.server = server;
2673 data->res.fh = &data->fh;
2674 data->res.fattr = &data->fattr;
2675 data->res.dir_fattr = &data->dir_fattr;
2676 nfs_fattr_init(data->res.fattr);
2677 nfs_fattr_init(data->res.dir_fattr);
2682 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2684 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2685 &data->arg, &data->res, 1);
2687 update_changeattr(dir, &data->res.dir_cinfo);
2688 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2689 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2694 static void nfs4_free_createdata(struct nfs4_createdata *data)
2699 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2700 struct page *page, unsigned int len, struct iattr *sattr)
2702 struct nfs4_createdata *data;
2703 int status = -ENAMETOOLONG;
2705 if (len > NFS4_MAXPATHLEN)
2709 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2713 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2714 data->arg.u.symlink.pages = &page;
2715 data->arg.u.symlink.len = len;
2717 status = nfs4_do_create(dir, dentry, data);
2719 nfs4_free_createdata(data);
2724 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2725 struct page *page, unsigned int len, struct iattr *sattr)
2727 struct nfs4_exception exception = { };
2730 err = nfs4_handle_exception(NFS_SERVER(dir),
2731 _nfs4_proc_symlink(dir, dentry, page,
2734 } while (exception.retry);
2738 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2739 struct iattr *sattr)
2741 struct nfs4_createdata *data;
2742 int status = -ENOMEM;
2744 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2748 status = nfs4_do_create(dir, dentry, data);
2750 nfs4_free_createdata(data);
2755 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2756 struct iattr *sattr)
2758 struct nfs4_exception exception = { };
2761 err = nfs4_handle_exception(NFS_SERVER(dir),
2762 _nfs4_proc_mkdir(dir, dentry, sattr),
2764 } while (exception.retry);
2768 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2769 u64 cookie, struct page *page, unsigned int count, int plus)
2771 struct inode *dir = dentry->d_inode;
2772 struct nfs4_readdir_arg args = {
2777 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2779 struct nfs4_readdir_res res;
2780 struct rpc_message msg = {
2781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2788 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2789 dentry->d_parent->d_name.name,
2790 dentry->d_name.name,
2791 (unsigned long long)cookie);
2792 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2793 res.pgbase = args.pgbase;
2794 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2796 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2798 nfs_invalidate_atime(dir);
2800 dprintk("%s: returns %d\n", __func__, status);
2804 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2805 u64 cookie, struct page *page, unsigned int count, int plus)
2807 struct nfs4_exception exception = { };
2810 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2811 _nfs4_proc_readdir(dentry, cred, cookie,
2814 } while (exception.retry);
2818 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2819 struct iattr *sattr, dev_t rdev)
2821 struct nfs4_createdata *data;
2822 int mode = sattr->ia_mode;
2823 int status = -ENOMEM;
2825 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2826 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2828 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2833 data->arg.ftype = NF4FIFO;
2834 else if (S_ISBLK(mode)) {
2835 data->arg.ftype = NF4BLK;
2836 data->arg.u.device.specdata1 = MAJOR(rdev);
2837 data->arg.u.device.specdata2 = MINOR(rdev);
2839 else if (S_ISCHR(mode)) {
2840 data->arg.ftype = NF4CHR;
2841 data->arg.u.device.specdata1 = MAJOR(rdev);
2842 data->arg.u.device.specdata2 = MINOR(rdev);
2845 status = nfs4_do_create(dir, dentry, data);
2847 nfs4_free_createdata(data);
2852 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2853 struct iattr *sattr, dev_t rdev)
2855 struct nfs4_exception exception = { };
2858 err = nfs4_handle_exception(NFS_SERVER(dir),
2859 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2861 } while (exception.retry);
2865 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2866 struct nfs_fsstat *fsstat)
2868 struct nfs4_statfs_arg args = {
2870 .bitmask = server->attr_bitmask,
2872 struct nfs4_statfs_res res = {
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2881 nfs_fattr_init(fsstat->fattr);
2882 return nfs4_call_sync(server, &msg, &args, &res, 0);
2885 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2887 struct nfs4_exception exception = { };
2890 err = nfs4_handle_exception(server,
2891 _nfs4_proc_statfs(server, fhandle, fsstat),
2893 } while (exception.retry);
2897 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2898 struct nfs_fsinfo *fsinfo)
2900 struct nfs4_fsinfo_arg args = {
2902 .bitmask = server->attr_bitmask,
2904 struct nfs4_fsinfo_res res = {
2907 struct rpc_message msg = {
2908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2913 return nfs4_call_sync(server, &msg, &args, &res, 0);
2916 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2918 struct nfs4_exception exception = { };
2922 err = nfs4_handle_exception(server,
2923 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2925 } while (exception.retry);
2929 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2931 nfs_fattr_init(fsinfo->fattr);
2932 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2935 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2936 struct nfs_pathconf *pathconf)
2938 struct nfs4_pathconf_arg args = {
2940 .bitmask = server->attr_bitmask,
2942 struct nfs4_pathconf_res res = {
2943 .pathconf = pathconf,
2945 struct rpc_message msg = {
2946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2951 /* None of the pathconf attributes are mandatory to implement */
2952 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2953 memset(pathconf, 0, sizeof(*pathconf));
2957 nfs_fattr_init(pathconf->fattr);
2958 return nfs4_call_sync(server, &msg, &args, &res, 0);
2961 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_pathconf *pathconf)
2964 struct nfs4_exception exception = { };
2968 err = nfs4_handle_exception(server,
2969 _nfs4_proc_pathconf(server, fhandle, pathconf),
2971 } while (exception.retry);
2975 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2977 struct nfs_server *server = NFS_SERVER(data->inode);
2979 dprintk("--> %s\n", __func__);
2981 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2982 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2984 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2985 nfs4_restart_rpc(task, server->nfs_client);
2989 nfs_invalidate_atime(data->inode);
2990 if (task->tk_status > 0)
2991 renew_lease(server, data->timestamp);
2995 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2997 data->timestamp = jiffies;
2998 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3001 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3003 struct inode *inode = data->inode;
3005 /* slot is freed in nfs_writeback_done */
3006 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3009 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3010 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3013 if (task->tk_status >= 0) {
3014 renew_lease(NFS_SERVER(inode), data->timestamp);
3015 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3020 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3022 struct nfs_server *server = NFS_SERVER(data->inode);
3024 data->args.bitmask = server->cache_consistency_bitmask;
3025 data->res.server = server;
3026 data->timestamp = jiffies;
3028 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3031 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3033 struct inode *inode = data->inode;
3035 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3037 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3038 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3041 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3042 &data->res.seq_res);
3043 nfs_refresh_inode(inode, data->res.fattr);
3047 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3049 struct nfs_server *server = NFS_SERVER(data->inode);
3051 data->args.bitmask = server->cache_consistency_bitmask;
3052 data->res.server = server;
3053 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3057 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3058 * standalone procedure for queueing an asynchronous RENEW.
3060 static void nfs4_renew_done(struct rpc_task *task, void *data)
3062 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3063 unsigned long timestamp = (unsigned long)data;
3065 if (task->tk_status < 0) {
3066 /* Unless we're shutting down, schedule state recovery! */
3067 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3068 nfs4_schedule_state_recovery(clp);
3071 spin_lock(&clp->cl_lock);
3072 if (time_before(clp->cl_last_renewal,timestamp))
3073 clp->cl_last_renewal = timestamp;
3074 spin_unlock(&clp->cl_lock);
3077 static const struct rpc_call_ops nfs4_renew_ops = {
3078 .rpc_call_done = nfs4_renew_done,
3081 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3083 struct rpc_message msg = {
3084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3089 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3090 &nfs4_renew_ops, (void *)jiffies);
3093 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3100 unsigned long now = jiffies;
3103 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3106 spin_lock(&clp->cl_lock);
3107 if (time_before(clp->cl_last_renewal,now))
3108 clp->cl_last_renewal = now;
3109 spin_unlock(&clp->cl_lock);
3113 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3115 return (server->caps & NFS_CAP_ACLS)
3116 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3117 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3120 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3121 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3124 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3126 static void buf_to_pages(const void *buf, size_t buflen,
3127 struct page **pages, unsigned int *pgbase)
3129 const void *p = buf;
3131 *pgbase = offset_in_page(buf);
3133 while (p < buf + buflen) {
3134 *(pages++) = virt_to_page(p);
3135 p += PAGE_CACHE_SIZE;
3139 struct nfs4_cached_acl {
3145 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3147 struct nfs_inode *nfsi = NFS_I(inode);
3149 spin_lock(&inode->i_lock);
3150 kfree(nfsi->nfs4_acl);
3151 nfsi->nfs4_acl = acl;
3152 spin_unlock(&inode->i_lock);
3155 static void nfs4_zap_acl_attr(struct inode *inode)
3157 nfs4_set_cached_acl(inode, NULL);
3160 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3162 struct nfs_inode *nfsi = NFS_I(inode);
3163 struct nfs4_cached_acl *acl;
3166 spin_lock(&inode->i_lock);
3167 acl = nfsi->nfs4_acl;
3170 if (buf == NULL) /* user is just asking for length */
3172 if (acl->cached == 0)
3174 ret = -ERANGE; /* see getxattr(2) man page */
3175 if (acl->len > buflen)
3177 memcpy(buf, acl->data, acl->len);
3181 spin_unlock(&inode->i_lock);
3185 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3187 struct nfs4_cached_acl *acl;
3189 if (buf && acl_len <= PAGE_SIZE) {
3190 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3194 memcpy(acl->data, buf, acl_len);
3196 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3203 nfs4_set_cached_acl(inode, acl);
3206 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3208 struct page *pages[NFS4ACL_MAXPAGES];
3209 struct nfs_getaclargs args = {
3210 .fh = NFS_FH(inode),
3214 struct nfs_getaclres res = {
3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3223 struct page *localpage = NULL;
3226 if (buflen < PAGE_SIZE) {
3227 /* As long as we're doing a round trip to the server anyway,
3228 * let's be prepared for a page of acl data. */
3229 localpage = alloc_page(GFP_KERNEL);
3230 resp_buf = page_address(localpage);
3231 if (localpage == NULL)
3233 args.acl_pages[0] = localpage;
3234 args.acl_pgbase = 0;
3235 args.acl_len = PAGE_SIZE;
3238 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3240 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3243 if (res.acl_len > args.acl_len)
3244 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3246 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3249 if (res.acl_len > buflen)
3252 memcpy(buf, resp_buf, res.acl_len);
3257 __free_page(localpage);
3261 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3263 struct nfs4_exception exception = { };
3266 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3269 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3270 } while (exception.retry);
3274 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3276 struct nfs_server *server = NFS_SERVER(inode);
3279 if (!nfs4_server_supports_acls(server))
3281 ret = nfs_revalidate_inode(server, inode);
3284 ret = nfs4_read_cached_acl(inode, buf, buflen);
3287 return nfs4_get_acl_uncached(inode, buf, buflen);
3290 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3292 struct nfs_server *server = NFS_SERVER(inode);
3293 struct page *pages[NFS4ACL_MAXPAGES];
3294 struct nfs_setaclargs arg = {
3295 .fh = NFS_FH(inode),
3299 struct nfs_setaclres res;
3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3307 if (!nfs4_server_supports_acls(server))
3309 nfs_inode_return_delegation(inode);
3310 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3311 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3312 nfs_access_zap_cache(inode);
3313 nfs_zap_acl_cache(inode);
3317 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3319 struct nfs4_exception exception = { };
3322 err = nfs4_handle_exception(NFS_SERVER(inode),
3323 __nfs4_proc_set_acl(inode, buf, buflen),
3325 } while (exception.retry);
3330 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3332 if (!clp || task->tk_status >= 0)
3334 switch(task->tk_status) {
3335 case -NFS4ERR_ADMIN_REVOKED:
3336 case -NFS4ERR_BAD_STATEID:
3337 case -NFS4ERR_OPENMODE:
3340 nfs4_state_mark_reclaim_nograce(clp, state);
3341 case -NFS4ERR_STALE_CLIENTID:
3342 case -NFS4ERR_STALE_STATEID:
3343 case -NFS4ERR_EXPIRED:
3344 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3345 nfs4_schedule_state_recovery(clp);
3346 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3347 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3348 task->tk_status = 0;
3350 #if defined(CONFIG_NFS_V4_1)
3351 case -NFS4ERR_BADSESSION:
3352 case -NFS4ERR_BADSLOT:
3353 case -NFS4ERR_BAD_HIGH_SLOT:
3354 case -NFS4ERR_DEADSESSION:
3355 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3356 case -NFS4ERR_SEQ_FALSE_RETRY:
3357 case -NFS4ERR_SEQ_MISORDERED:
3358 dprintk("%s ERROR %d, Reset session\n", __func__,
3360 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3361 task->tk_status = 0;
3363 #endif /* CONFIG_NFS_V4_1 */
3364 case -NFS4ERR_DELAY:
3366 nfs_inc_server_stats(server, NFSIOS_DELAY);
3367 case -NFS4ERR_GRACE:
3368 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3369 task->tk_status = 0;
3371 case -NFS4ERR_OLD_STATEID:
3372 task->tk_status = 0;
3375 task->tk_status = nfs4_map_errors(task->tk_status);
3380 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3382 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3385 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3387 nfs4_verifier sc_verifier;
3388 struct nfs4_setclientid setclientid = {
3389 .sc_verifier = &sc_verifier,
3392 struct rpc_message msg = {
3393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3394 .rpc_argp = &setclientid,
3402 p = (__be32*)sc_verifier.data;
3403 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3404 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3407 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3408 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3410 rpc_peeraddr2str(clp->cl_rpcclient,
3412 rpc_peeraddr2str(clp->cl_rpcclient,
3414 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3415 clp->cl_id_uniquifier);
3416 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3417 sizeof(setclientid.sc_netid),
3418 rpc_peeraddr2str(clp->cl_rpcclient,
3419 RPC_DISPLAY_NETID));
3420 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3421 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3422 clp->cl_ipaddr, port >> 8, port & 255);
3424 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3425 if (status != -NFS4ERR_CLID_INUSE)
3430 ssleep(clp->cl_lease_time + 1);
3432 if (++clp->cl_id_uniquifier == 0)
3438 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3440 struct nfs_fsinfo fsinfo;
3441 struct rpc_message msg = {
3442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3444 .rpc_resp = &fsinfo,
3451 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3453 spin_lock(&clp->cl_lock);
3454 clp->cl_lease_time = fsinfo.lease_time * HZ;
3455 clp->cl_last_renewal = now;
3456 spin_unlock(&clp->cl_lock);
3461 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3466 err = _nfs4_proc_setclientid_confirm(clp, cred);
3470 case -NFS4ERR_RESOURCE:
3471 /* The IBM lawyers misread another document! */
3472 case -NFS4ERR_DELAY:
3473 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3479 struct nfs4_delegreturndata {
3480 struct nfs4_delegreturnargs args;
3481 struct nfs4_delegreturnres res;
3483 nfs4_stateid stateid;
3484 unsigned long timestamp;
3485 struct nfs_fattr fattr;
3489 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3491 struct nfs4_delegreturndata *data = calldata;
3493 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3496 data->rpc_status = task->tk_status;
3497 if (data->rpc_status == 0)
3498 renew_lease(data->res.server, data->timestamp);
3501 static void nfs4_delegreturn_release(void *calldata)
3506 #if defined(CONFIG_NFS_V4_1)
3507 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3509 struct nfs4_delegreturndata *d_data;
3511 d_data = (struct nfs4_delegreturndata *)data;
3513 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3514 &d_data->args.seq_args,
3515 &d_data->res.seq_res, 1, task))
3517 rpc_call_start(task);
3519 #endif /* CONFIG_NFS_V4_1 */
3521 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3522 #if defined(CONFIG_NFS_V4_1)
3523 .rpc_call_prepare = nfs4_delegreturn_prepare,
3524 #endif /* CONFIG_NFS_V4_1 */
3525 .rpc_call_done = nfs4_delegreturn_done,
3526 .rpc_release = nfs4_delegreturn_release,
3529 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3531 struct nfs4_delegreturndata *data;
3532 struct nfs_server *server = NFS_SERVER(inode);
3533 struct rpc_task *task;
3534 struct rpc_message msg = {
3535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3538 struct rpc_task_setup task_setup_data = {
3539 .rpc_client = server->client,
3540 .rpc_message = &msg,
3541 .callback_ops = &nfs4_delegreturn_ops,
3542 .flags = RPC_TASK_ASYNC,
3546 data = kzalloc(sizeof(*data), GFP_KERNEL);
3549 data->args.fhandle = &data->fh;
3550 data->args.stateid = &data->stateid;
3551 data->args.bitmask = server->attr_bitmask;
3552 nfs_copy_fh(&data->fh, NFS_FH(inode));
3553 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3554 data->res.fattr = &data->fattr;
3555 data->res.server = server;
3556 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3557 nfs_fattr_init(data->res.fattr);
3558 data->timestamp = jiffies;
3559 data->rpc_status = 0;
3561 task_setup_data.callback_data = data;
3562 msg.rpc_argp = &data->args,
3563 msg.rpc_resp = &data->res,
3564 task = rpc_run_task(&task_setup_data);
3566 return PTR_ERR(task);
3569 status = nfs4_wait_for_completion_rpc_task(task);
3572 status = data->rpc_status;
3575 nfs_refresh_inode(inode, &data->fattr);
3581 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3583 struct nfs_server *server = NFS_SERVER(inode);
3584 struct nfs4_exception exception = { };
3587 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3589 case -NFS4ERR_STALE_STATEID:
3590 case -NFS4ERR_EXPIRED:
3594 err = nfs4_handle_exception(server, err, &exception);
3595 } while (exception.retry);
3599 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3600 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3603 * sleep, with exponential backoff, and retry the LOCK operation.
3605 static unsigned long
3606 nfs4_set_lock_task_retry(unsigned long timeout)
3608 schedule_timeout_killable(timeout);
3610 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3611 return NFS4_LOCK_MAXTIMEOUT;
3615 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3617 struct inode *inode = state->inode;
3618 struct nfs_server *server = NFS_SERVER(inode);
3619 struct nfs_client *clp = server->nfs_client;
3620 struct nfs_lockt_args arg = {
3621 .fh = NFS_FH(inode),
3624 struct nfs_lockt_res res = {
3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3631 .rpc_cred = state->owner->so_cred,
3633 struct nfs4_lock_state *lsp;
3636 arg.lock_owner.clientid = clp->cl_clientid;
3637 status = nfs4_set_lock_state(state, request);
3640 lsp = request->fl_u.nfs4_fl.owner;
3641 arg.lock_owner.id = lsp->ls_id.id;
3642 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3645 request->fl_type = F_UNLCK;
3647 case -NFS4ERR_DENIED:
3650 request->fl_ops->fl_release_private(request);
3655 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3657 struct nfs4_exception exception = { };
3661 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3662 _nfs4_proc_getlk(state, cmd, request),
3664 } while (exception.retry);
3668 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3671 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3673 res = posix_lock_file_wait(file, fl);
3676 res = flock_lock_file_wait(file, fl);
3684 struct nfs4_unlockdata {
3685 struct nfs_locku_args arg;
3686 struct nfs_locku_res res;
3687 struct nfs4_lock_state *lsp;
3688 struct nfs_open_context *ctx;
3689 struct file_lock fl;
3690 const struct nfs_server *server;
3691 unsigned long timestamp;
3694 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3695 struct nfs_open_context *ctx,
3696 struct nfs4_lock_state *lsp,
3697 struct nfs_seqid *seqid)
3699 struct nfs4_unlockdata *p;
3700 struct inode *inode = lsp->ls_state->inode;
3702 p = kzalloc(sizeof(*p), GFP_KERNEL);
3705 p->arg.fh = NFS_FH(inode);
3707 p->arg.seqid = seqid;
3708 p->res.seqid = seqid;
3709 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3710 p->arg.stateid = &lsp->ls_stateid;
3712 atomic_inc(&lsp->ls_count);
3713 /* Ensure we don't close file until we're done freeing locks! */
3714 p->ctx = get_nfs_open_context(ctx);
3715 memcpy(&p->fl, fl, sizeof(p->fl));
3716 p->server = NFS_SERVER(inode);
3720 static void nfs4_locku_release_calldata(void *data)
3722 struct nfs4_unlockdata *calldata = data;
3723 nfs_free_seqid(calldata->arg.seqid);
3724 nfs4_put_lock_state(calldata->lsp);
3725 put_nfs_open_context(calldata->ctx);
3729 static void nfs4_locku_done(struct rpc_task *task, void *data)
3731 struct nfs4_unlockdata *calldata = data;
3733 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3735 if (RPC_ASSASSINATED(task))
3737 switch (task->tk_status) {
3739 memcpy(calldata->lsp->ls_stateid.data,
3740 calldata->res.stateid.data,
3741 sizeof(calldata->lsp->ls_stateid.data));
3742 renew_lease(calldata->server, calldata->timestamp);
3744 case -NFS4ERR_BAD_STATEID:
3745 case -NFS4ERR_OLD_STATEID:
3746 case -NFS4ERR_STALE_STATEID:
3747 case -NFS4ERR_EXPIRED:
3750 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3751 nfs4_restart_rpc(task,
3752 calldata->server->nfs_client);
3754 nfs4_sequence_free_slot(calldata->server->nfs_client,
3755 &calldata->res.seq_res);
3758 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3760 struct nfs4_unlockdata *calldata = data;
3762 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3764 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3765 /* Note: exit _without_ running nfs4_locku_done */
3766 task->tk_action = NULL;
3769 calldata->timestamp = jiffies;
3770 if (nfs4_setup_sequence(calldata->server->nfs_client,
3771 &calldata->arg.seq_args,
3772 &calldata->res.seq_res, 1, task))
3774 rpc_call_start(task);
3777 static const struct rpc_call_ops nfs4_locku_ops = {
3778 .rpc_call_prepare = nfs4_locku_prepare,
3779 .rpc_call_done = nfs4_locku_done,
3780 .rpc_release = nfs4_locku_release_calldata,
3783 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3784 struct nfs_open_context *ctx,
3785 struct nfs4_lock_state *lsp,
3786 struct nfs_seqid *seqid)
3788 struct nfs4_unlockdata *data;
3789 struct rpc_message msg = {
3790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3791 .rpc_cred = ctx->cred,
3793 struct rpc_task_setup task_setup_data = {
3794 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3795 .rpc_message = &msg,
3796 .callback_ops = &nfs4_locku_ops,
3797 .workqueue = nfsiod_workqueue,
3798 .flags = RPC_TASK_ASYNC,
3801 /* Ensure this is an unlock - when canceling a lock, the
3802 * canceled lock is passed in, and it won't be an unlock.
3804 fl->fl_type = F_UNLCK;
3806 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3808 nfs_free_seqid(seqid);
3809 return ERR_PTR(-ENOMEM);
3812 msg.rpc_argp = &data->arg,
3813 msg.rpc_resp = &data->res,
3814 task_setup_data.callback_data = data;
3815 return rpc_run_task(&task_setup_data);
3818 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3820 struct nfs_inode *nfsi = NFS_I(state->inode);
3821 struct nfs_seqid *seqid;
3822 struct nfs4_lock_state *lsp;
3823 struct rpc_task *task;
3825 unsigned char fl_flags = request->fl_flags;
3827 status = nfs4_set_lock_state(state, request);
3828 /* Unlock _before_ we do the RPC call */
3829 request->fl_flags |= FL_EXISTS;
3830 down_read(&nfsi->rwsem);
3831 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3832 up_read(&nfsi->rwsem);
3835 up_read(&nfsi->rwsem);
3838 /* Is this a delegated lock? */
3839 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3841 lsp = request->fl_u.nfs4_fl.owner;
3842 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3846 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3847 status = PTR_ERR(task);
3850 status = nfs4_wait_for_completion_rpc_task(task);
3853 request->fl_flags = fl_flags;
3857 struct nfs4_lockdata {
3858 struct nfs_lock_args arg;
3859 struct nfs_lock_res res;
3860 struct nfs4_lock_state *lsp;
3861 struct nfs_open_context *ctx;
3862 struct file_lock fl;
3863 unsigned long timestamp;
3866 struct nfs_server *server;
3869 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3870 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3872 struct nfs4_lockdata *p;
3873 struct inode *inode = lsp->ls_state->inode;
3874 struct nfs_server *server = NFS_SERVER(inode);
3876 p = kzalloc(sizeof(*p), GFP_KERNEL);
3880 p->arg.fh = NFS_FH(inode);
3882 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3883 if (p->arg.open_seqid == NULL)
3885 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3886 if (p->arg.lock_seqid == NULL)
3887 goto out_free_seqid;
3888 p->arg.lock_stateid = &lsp->ls_stateid;
3889 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3890 p->arg.lock_owner.id = lsp->ls_id.id;
3891 p->res.lock_seqid = p->arg.lock_seqid;
3892 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3895 atomic_inc(&lsp->ls_count);
3896 p->ctx = get_nfs_open_context(ctx);
3897 memcpy(&p->fl, fl, sizeof(p->fl));
3900 nfs_free_seqid(p->arg.open_seqid);
3906 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3908 struct nfs4_lockdata *data = calldata;
3909 struct nfs4_state *state = data->lsp->ls_state;
3911 dprintk("%s: begin!\n", __func__);
3912 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3914 /* Do we need to do an open_to_lock_owner? */
3915 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3916 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3918 data->arg.open_stateid = &state->stateid;
3919 data->arg.new_lock_owner = 1;
3920 data->res.open_seqid = data->arg.open_seqid;
3922 data->arg.new_lock_owner = 0;
3923 data->timestamp = jiffies;
3924 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3925 &data->res.seq_res, 1, task))
3927 rpc_call_start(task);
3928 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3931 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3933 struct nfs4_lockdata *data = calldata;
3935 dprintk("%s: begin!\n", __func__);
3937 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3940 data->rpc_status = task->tk_status;
3941 if (RPC_ASSASSINATED(task))
3943 if (data->arg.new_lock_owner != 0) {
3944 if (data->rpc_status == 0)
3945 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3949 if (data->rpc_status == 0) {
3950 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3951 sizeof(data->lsp->ls_stateid.data));
3952 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3953 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3956 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3959 static void nfs4_lock_release(void *calldata)
3961 struct nfs4_lockdata *data = calldata;
3963 dprintk("%s: begin!\n", __func__);
3964 nfs_free_seqid(data->arg.open_seqid);
3965 if (data->cancelled != 0) {
3966 struct rpc_task *task;
3967 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3968 data->arg.lock_seqid);
3971 dprintk("%s: cancelling lock!\n", __func__);
3973 nfs_free_seqid(data->arg.lock_seqid);
3974 nfs4_put_lock_state(data->lsp);
3975 put_nfs_open_context(data->ctx);
3977 dprintk("%s: done!\n", __func__);
3980 static const struct rpc_call_ops nfs4_lock_ops = {
3981 .rpc_call_prepare = nfs4_lock_prepare,
3982 .rpc_call_done = nfs4_lock_done,
3983 .rpc_release = nfs4_lock_release,
3986 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3988 struct nfs4_lockdata *data;
3989 struct rpc_task *task;
3990 struct rpc_message msg = {
3991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3992 .rpc_cred = state->owner->so_cred,
3994 struct rpc_task_setup task_setup_data = {
3995 .rpc_client = NFS_CLIENT(state->inode),
3996 .rpc_message = &msg,
3997 .callback_ops = &nfs4_lock_ops,
3998 .workqueue = nfsiod_workqueue,
3999 .flags = RPC_TASK_ASYNC,
4003 dprintk("%s: begin!\n", __func__);
4004 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4005 fl->fl_u.nfs4_fl.owner);
4009 data->arg.block = 1;
4011 data->arg.reclaim = 1;
4012 msg.rpc_argp = &data->arg,
4013 msg.rpc_resp = &data->res,
4014 task_setup_data.callback_data = data;
4015 task = rpc_run_task(&task_setup_data);
4017 return PTR_ERR(task);
4018 ret = nfs4_wait_for_completion_rpc_task(task);
4020 ret = data->rpc_status;
4022 data->cancelled = 1;
4024 dprintk("%s: done, ret = %d!\n", __func__, ret);
4028 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4030 struct nfs_server *server = NFS_SERVER(state->inode);
4031 struct nfs4_exception exception = { };
4035 /* Cache the lock if possible... */
4036 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4038 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4039 if (err != -NFS4ERR_DELAY)
4041 nfs4_handle_exception(server, err, &exception);
4042 } while (exception.retry);
4046 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4048 struct nfs_server *server = NFS_SERVER(state->inode);
4049 struct nfs4_exception exception = { };
4052 err = nfs4_set_lock_state(state, request);
4056 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4058 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4059 if (err != -NFS4ERR_DELAY)
4061 nfs4_handle_exception(server, err, &exception);
4062 } while (exception.retry);
4066 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4068 struct nfs_inode *nfsi = NFS_I(state->inode);
4069 unsigned char fl_flags = request->fl_flags;
4072 /* Is this a delegated open? */
4073 status = nfs4_set_lock_state(state, request);
4076 request->fl_flags |= FL_ACCESS;
4077 status = do_vfs_lock(request->fl_file, request);
4080 down_read(&nfsi->rwsem);
4081 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4082 /* Yes: cache locks! */
4083 /* ...but avoid races with delegation recall... */
4084 request->fl_flags = fl_flags & ~FL_SLEEP;
4085 status = do_vfs_lock(request->fl_file, request);
4088 status = _nfs4_do_setlk(state, cmd, request, 0);
4091 /* Note: we always want to sleep here! */
4092 request->fl_flags = fl_flags | FL_SLEEP;
4093 if (do_vfs_lock(request->fl_file, request) < 0)
4094 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4096 up_read(&nfsi->rwsem);
4098 request->fl_flags = fl_flags;
4102 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4104 struct nfs4_exception exception = { };
4108 err = _nfs4_proc_setlk(state, cmd, request);
4109 if (err == -NFS4ERR_DENIED)
4111 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4113 } while (exception.retry);
4118 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4120 struct nfs_open_context *ctx;
4121 struct nfs4_state *state;
4122 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4125 /* verify open state */
4126 ctx = nfs_file_open_context(filp);
4129 if (request->fl_start < 0 || request->fl_end < 0)
4132 if (IS_GETLK(cmd)) {
4134 return nfs4_proc_getlk(state, F_GETLK, request);
4138 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4141 if (request->fl_type == F_UNLCK) {
4143 return nfs4_proc_unlck(state, cmd, request);
4150 status = nfs4_proc_setlk(state, cmd, request);
4151 if ((status != -EAGAIN) || IS_SETLK(cmd))
4153 timeout = nfs4_set_lock_task_retry(timeout);
4154 status = -ERESTARTSYS;
4157 } while(status < 0);
4161 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4163 struct nfs_server *server = NFS_SERVER(state->inode);
4164 struct nfs4_exception exception = { };
4167 err = nfs4_set_lock_state(state, fl);
4171 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4174 printk(KERN_ERR "%s: unhandled error %d.\n",
4179 case -NFS4ERR_EXPIRED:
4180 case -NFS4ERR_STALE_CLIENTID:
4181 case -NFS4ERR_STALE_STATEID:
4182 nfs4_schedule_state_recovery(server->nfs_client);
4186 * The show must go on: exit, but mark the
4187 * stateid as needing recovery.
4189 case -NFS4ERR_ADMIN_REVOKED:
4190 case -NFS4ERR_BAD_STATEID:
4191 case -NFS4ERR_OPENMODE:
4192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4196 case -NFS4ERR_DENIED:
4197 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4200 case -NFS4ERR_DELAY:
4203 err = nfs4_handle_exception(server, err, &exception);
4204 } while (exception.retry);
4209 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4211 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4212 size_t buflen, int flags)
4214 struct inode *inode = dentry->d_inode;
4216 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4219 return nfs4_proc_set_acl(inode, buf, buflen);
4222 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4223 * and that's what we'll do for e.g. user attributes that haven't been set.
4224 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4225 * attributes in kernel-managed attribute namespaces. */
4226 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4229 struct inode *inode = dentry->d_inode;
4231 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4234 return nfs4_proc_get_acl(inode, buf, buflen);
4237 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4239 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4241 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4243 if (buf && buflen < len)
4246 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4250 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4252 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4253 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4254 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4257 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4258 NFS_ATTR_FATTR_NLINK;
4259 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4263 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4264 struct nfs4_fs_locations *fs_locations, struct page *page)
4266 struct nfs_server *server = NFS_SERVER(dir);
4268 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4269 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4271 struct nfs4_fs_locations_arg args = {
4272 .dir_fh = NFS_FH(dir),
4277 struct nfs4_fs_locations_res res = {
4278 .fs_locations = fs_locations,
4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4287 dprintk("%s: start\n", __func__);
4288 nfs_fattr_init(&fs_locations->fattr);
4289 fs_locations->server = server;
4290 fs_locations->nlocations = 0;
4291 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4292 nfs_fixup_referral_attributes(&fs_locations->fattr);
4293 dprintk("%s: returned status = %d\n", __func__, status);
4297 #ifdef CONFIG_NFS_V4_1
4299 * nfs4_proc_exchange_id()
4301 * Since the clientid has expired, all compounds using sessions
4302 * associated with the stale clientid will be returning
4303 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4304 * be in some phase of session reset.
4306 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4308 nfs4_verifier verifier;
4309 struct nfs41_exchange_id_args args = {
4311 .flags = clp->cl_exchange_flags,
4313 struct nfs41_exchange_id_res res = {
4317 struct rpc_message msg = {
4318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4325 dprintk("--> %s\n", __func__);
4326 BUG_ON(clp == NULL);
4328 p = (u32 *)verifier.data;
4329 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4330 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4331 args.verifier = &verifier;
4334 args.id_len = scnprintf(args.id, sizeof(args.id),
4337 rpc_peeraddr2str(clp->cl_rpcclient,
4339 clp->cl_id_uniquifier);
4341 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4343 if (status != NFS4ERR_CLID_INUSE)
4349 if (++clp->cl_id_uniquifier == 0)
4353 dprintk("<-- %s status= %d\n", __func__, status);
4357 struct nfs4_get_lease_time_data {
4358 struct nfs4_get_lease_time_args *args;
4359 struct nfs4_get_lease_time_res *res;
4360 struct nfs_client *clp;
4363 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4367 struct nfs4_get_lease_time_data *data =
4368 (struct nfs4_get_lease_time_data *)calldata;
4370 dprintk("--> %s\n", __func__);
4371 /* just setup sequence, do not trigger session recovery
4372 since we're invoked within one */
4373 ret = nfs41_setup_sequence(data->clp->cl_session,
4374 &data->args->la_seq_args,
4375 &data->res->lr_seq_res, 0, task);
4377 BUG_ON(ret == -EAGAIN);
4378 rpc_call_start(task);
4379 dprintk("<-- %s\n", __func__);
4383 * Called from nfs4_state_manager thread for session setup, so don't recover
4384 * from sequence operation or clientid errors.
4386 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4388 struct nfs4_get_lease_time_data *data =
4389 (struct nfs4_get_lease_time_data *)calldata;
4391 dprintk("--> %s\n", __func__);
4392 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4393 switch (task->tk_status) {
4394 case -NFS4ERR_DELAY:
4395 case -NFS4ERR_GRACE:
4396 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4397 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4398 task->tk_status = 0;
4399 nfs4_restart_rpc(task, data->clp);
4402 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4403 dprintk("<-- %s\n", __func__);
4406 struct rpc_call_ops nfs4_get_lease_time_ops = {
4407 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4408 .rpc_call_done = nfs4_get_lease_time_done,
4411 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4413 struct rpc_task *task;
4414 struct nfs4_get_lease_time_args args;
4415 struct nfs4_get_lease_time_res res = {
4416 .lr_fsinfo = fsinfo,
4418 struct nfs4_get_lease_time_data data = {
4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4428 struct rpc_task_setup task_setup = {
4429 .rpc_client = clp->cl_rpcclient,
4430 .rpc_message = &msg,
4431 .callback_ops = &nfs4_get_lease_time_ops,
4432 .callback_data = &data
4436 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4437 dprintk("--> %s\n", __func__);
4438 task = rpc_run_task(&task_setup);
4441 status = PTR_ERR(task);
4443 status = task->tk_status;
4446 dprintk("<-- %s return %d\n", __func__, status);
4452 * Reset a slot table
4454 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4455 int old_max_slots, int ivalue)
4460 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4463 * Until we have dynamic slot table adjustment, insist
4464 * upon the same slot table size
4466 if (max_slots != old_max_slots) {
4467 dprintk("%s reset slot table does't match old\n",
4469 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4472 spin_lock(&tbl->slot_tbl_lock);
4473 for (i = 0; i < max_slots; ++i)
4474 tbl->slots[i].seq_nr = ivalue;
4475 tbl->highest_used_slotid = -1;
4476 spin_unlock(&tbl->slot_tbl_lock);
4477 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4478 tbl, tbl->slots, tbl->max_slots);
4480 dprintk("<-- %s: return %d\n", __func__, ret);
4485 * Reset the forechannel and backchannel slot tables
4487 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4491 status = nfs4_reset_slot_table(&session->fc_slot_table,
4492 session->fc_attrs.max_reqs,
4493 session->fc_slot_table.max_slots,
4498 status = nfs4_reset_slot_table(&session->bc_slot_table,
4499 session->bc_attrs.max_reqs,
4500 session->bc_slot_table.max_slots,
4505 /* Destroy the slot table */
4506 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4508 if (session->fc_slot_table.slots != NULL) {
4509 kfree(session->fc_slot_table.slots);
4510 session->fc_slot_table.slots = NULL;
4512 if (session->bc_slot_table.slots != NULL) {
4513 kfree(session->bc_slot_table.slots);
4514 session->bc_slot_table.slots = NULL;
4520 * Initialize slot table
4522 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4523 int max_slots, int ivalue)
4526 struct nfs4_slot *slot;
4529 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4531 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4533 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4536 for (i = 0; i < max_slots; ++i)
4537 slot[i].seq_nr = ivalue;
4540 spin_lock(&tbl->slot_tbl_lock);
4541 if (tbl->slots != NULL) {
4542 spin_unlock(&tbl->slot_tbl_lock);
4543 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4544 __func__, tbl, tbl->slots);
4548 tbl->max_slots = max_slots;
4550 tbl->highest_used_slotid = -1; /* no slot is currently used */
4551 spin_unlock(&tbl->slot_tbl_lock);
4552 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4553 tbl, tbl->slots, tbl->max_slots);
4555 dprintk("<-- %s: return %d\n", __func__, ret);
4564 * Initialize the forechannel and backchannel tables
4566 static int nfs4_init_slot_tables(struct nfs4_session *session)
4570 status = nfs4_init_slot_table(&session->fc_slot_table,
4571 session->fc_attrs.max_reqs, 1);
4575 status = nfs4_init_slot_table(&session->bc_slot_table,
4576 session->bc_attrs.max_reqs, 0);
4578 nfs4_destroy_slot_tables(session);
4583 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4585 struct nfs4_session *session;
4586 struct nfs4_slot_table *tbl;
4588 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4592 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4594 * The create session reply races with the server back
4595 * channel probe. Mark the client NFS_CS_SESSION_INITING
4596 * so that the client back channel can find the
4599 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4601 tbl = &session->fc_slot_table;
4602 spin_lock_init(&tbl->slot_tbl_lock);
4603 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4605 tbl = &session->bc_slot_table;
4606 spin_lock_init(&tbl->slot_tbl_lock);
4607 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4613 void nfs4_destroy_session(struct nfs4_session *session)
4615 nfs4_proc_destroy_session(session);
4616 dprintk("%s Destroy backchannel for xprt %p\n",
4617 __func__, session->clp->cl_rpcclient->cl_xprt);
4618 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4619 NFS41_BC_MIN_CALLBACKS);
4620 nfs4_destroy_slot_tables(session);
4625 * Initialize the values to be used by the client in CREATE_SESSION
4626 * If nfs4_init_session set the fore channel request and response sizes,
4629 * Set the back channel max_resp_sz_cached to zero to force the client to
4630 * always set csa_cachethis to FALSE because the current implementation
4631 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4633 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4635 struct nfs4_session *session = args->client->cl_session;
4636 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4637 mxresp_sz = session->fc_attrs.max_resp_sz;
4640 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4642 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4643 /* Fore channel attributes */
4644 args->fc_attrs.headerpadsz = 0;
4645 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4646 args->fc_attrs.max_resp_sz = mxresp_sz;
4647 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4648 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4649 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4651 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4652 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4654 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4655 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4656 args->fc_attrs.max_reqs);
4658 /* Back channel attributes */
4659 args->bc_attrs.headerpadsz = 0;
4660 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4661 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4662 args->bc_attrs.max_resp_sz_cached = 0;
4663 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4664 args->bc_attrs.max_reqs = 1;
4666 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4667 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4669 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4670 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4671 args->bc_attrs.max_reqs);
4674 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4678 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4679 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4683 #define _verify_fore_channel_attr(_name_) \
4684 _verify_channel_attr("fore", #_name_, \
4685 args->fc_attrs._name_, \
4686 session->fc_attrs._name_)
4688 #define _verify_back_channel_attr(_name_) \
4689 _verify_channel_attr("back", #_name_, \
4690 args->bc_attrs._name_, \
4691 session->bc_attrs._name_)
4694 * The server is not allowed to increase the fore channel header pad size,
4695 * maximum response size, or maximum number of operations.
4697 * The back channel attributes are only negotiatied down: We send what the
4698 * (back channel) server insists upon.
4700 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4701 struct nfs4_session *session)
4705 ret |= _verify_fore_channel_attr(headerpadsz);
4706 ret |= _verify_fore_channel_attr(max_resp_sz);
4707 ret |= _verify_fore_channel_attr(max_ops);
4709 ret |= _verify_back_channel_attr(headerpadsz);
4710 ret |= _verify_back_channel_attr(max_rqst_sz);
4711 ret |= _verify_back_channel_attr(max_resp_sz);
4712 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4713 ret |= _verify_back_channel_attr(max_ops);
4714 ret |= _verify_back_channel_attr(max_reqs);
4719 static int _nfs4_proc_create_session(struct nfs_client *clp)
4721 struct nfs4_session *session = clp->cl_session;
4722 struct nfs41_create_session_args args = {
4724 .cb_program = NFS4_CALLBACK,
4726 struct nfs41_create_session_res res = {
4729 struct rpc_message msg = {
4730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4736 nfs4_init_channel_attrs(&args);
4737 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4739 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4742 /* Verify the session's negotiated channel_attrs values */
4743 status = nfs4_verify_channel_attrs(&args, session);
4745 /* Increment the clientid slot sequence id */
4753 * Issues a CREATE_SESSION operation to the server.
4754 * It is the responsibility of the caller to verify the session is
4755 * expired before calling this routine.
4757 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4761 struct nfs_fsinfo fsinfo;
4762 struct nfs4_session *session = clp->cl_session;
4764 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4766 status = _nfs4_proc_create_session(clp);
4770 /* Init or reset the fore channel */
4772 status = nfs4_reset_slot_tables(session);
4774 status = nfs4_init_slot_tables(session);
4775 dprintk("fore channel slot table initialization returned %d\n", status);
4779 ptr = (unsigned *)&session->sess_id.data[0];
4780 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4781 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4784 /* Lease time is aleady set */
4787 /* Get the lease time */
4788 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4790 /* Update lease time and schedule renewal */
4791 spin_lock(&clp->cl_lock);
4792 clp->cl_lease_time = fsinfo.lease_time * HZ;
4793 clp->cl_last_renewal = jiffies;
4794 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4795 spin_unlock(&clp->cl_lock);
4797 nfs4_schedule_state_renewal(clp);
4800 dprintk("<-- %s\n", __func__);
4805 * Issue the over-the-wire RPC DESTROY_SESSION.
4806 * The caller must serialize access to this routine.
4808 int nfs4_proc_destroy_session(struct nfs4_session *session)
4811 struct rpc_message msg;
4813 dprintk("--> nfs4_proc_destroy_session\n");
4815 /* session is still being setup */
4816 if (session->clp->cl_cons_state != NFS_CS_READY)
4819 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4820 msg.rpc_argp = session;
4821 msg.rpc_resp = NULL;
4822 msg.rpc_cred = NULL;
4823 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4827 "Got error %d from the server on DESTROY_SESSION. "
4828 "Session has been destroyed regardless...\n", status);
4830 dprintk("<-- nfs4_proc_destroy_session\n");
4834 int nfs4_init_session(struct nfs_server *server)
4836 struct nfs_client *clp = server->nfs_client;
4839 if (!nfs4_has_session(clp))
4842 clp->cl_session->fc_attrs.max_rqst_sz = server->wsize;
4843 clp->cl_session->fc_attrs.max_resp_sz = server->rsize;
4844 ret = nfs4_recover_expired_lease(server);
4846 ret = nfs4_check_client_ready(clp);
4851 * Renew the cl_session lease.
4853 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4855 struct nfs4_sequence_args args;
4856 struct nfs4_sequence_res res;
4858 struct rpc_message msg = {
4859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4865 args.sa_cache_this = 0;
4867 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4871 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4873 struct nfs_client *clp = (struct nfs_client *)data;
4875 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4877 if (task->tk_status < 0) {
4878 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4880 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4882 nfs4_restart_rpc(task, clp);
4886 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4887 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4889 kfree(task->tk_msg.rpc_argp);
4890 kfree(task->tk_msg.rpc_resp);
4892 dprintk("<-- %s\n", __func__);
4895 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4897 struct nfs_client *clp;
4898 struct nfs4_sequence_args *args;
4899 struct nfs4_sequence_res *res;
4901 clp = (struct nfs_client *)data;
4902 args = task->tk_msg.rpc_argp;
4903 res = task->tk_msg.rpc_resp;
4905 if (nfs4_setup_sequence(clp, args, res, 0, task))
4907 rpc_call_start(task);
4910 static const struct rpc_call_ops nfs41_sequence_ops = {
4911 .rpc_call_done = nfs41_sequence_call_done,
4912 .rpc_call_prepare = nfs41_sequence_prepare,
4915 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4916 struct rpc_cred *cred)
4918 struct nfs4_sequence_args *args;
4919 struct nfs4_sequence_res *res;
4920 struct rpc_message msg = {
4921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4925 args = kzalloc(sizeof(*args), GFP_KERNEL);
4928 res = kzalloc(sizeof(*res), GFP_KERNEL);
4933 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4934 msg.rpc_argp = args;
4937 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4938 &nfs41_sequence_ops, (void *)clp);
4941 #endif /* CONFIG_NFS_V4_1 */
4943 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4944 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4945 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4946 .recover_open = nfs4_open_reclaim,
4947 .recover_lock = nfs4_lock_reclaim,
4948 .establish_clid = nfs4_init_clientid,
4949 .get_clid_cred = nfs4_get_setclientid_cred,
4952 #if defined(CONFIG_NFS_V4_1)
4953 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4954 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4955 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4956 .recover_open = nfs4_open_reclaim,
4957 .recover_lock = nfs4_lock_reclaim,
4958 .establish_clid = nfs4_proc_exchange_id,
4959 .get_clid_cred = nfs4_get_exchange_id_cred,
4961 #endif /* CONFIG_NFS_V4_1 */
4963 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4964 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4965 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4966 .recover_open = nfs4_open_expired,
4967 .recover_lock = nfs4_lock_expired,
4968 .establish_clid = nfs4_init_clientid,
4969 .get_clid_cred = nfs4_get_setclientid_cred,
4972 #if defined(CONFIG_NFS_V4_1)
4973 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
4974 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4975 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4976 .recover_open = nfs4_open_expired,
4977 .recover_lock = nfs4_lock_expired,
4978 .establish_clid = nfs4_proc_exchange_id,
4979 .get_clid_cred = nfs4_get_exchange_id_cred,
4981 #endif /* CONFIG_NFS_V4_1 */
4983 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4984 .sched_state_renewal = nfs4_proc_async_renew,
4985 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
4986 .renew_lease = nfs4_proc_renew,
4989 #if defined(CONFIG_NFS_V4_1)
4990 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4991 .sched_state_renewal = nfs41_proc_async_sequence,
4992 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
4993 .renew_lease = nfs4_proc_sequence,
4998 * Per minor version reboot and network partition recovery ops
5001 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
5002 &nfs40_reboot_recovery_ops,
5003 #if defined(CONFIG_NFS_V4_1)
5004 &nfs41_reboot_recovery_ops,
5008 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
5009 &nfs40_nograce_recovery_ops,
5010 #if defined(CONFIG_NFS_V4_1)
5011 &nfs41_nograce_recovery_ops,
5015 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
5016 &nfs40_state_renewal_ops,
5017 #if defined(CONFIG_NFS_V4_1)
5018 &nfs41_state_renewal_ops,
5022 static const struct inode_operations nfs4_file_inode_operations = {
5023 .permission = nfs_permission,
5024 .getattr = nfs_getattr,
5025 .setattr = nfs_setattr,
5026 .getxattr = nfs4_getxattr,
5027 .setxattr = nfs4_setxattr,
5028 .listxattr = nfs4_listxattr,
5031 const struct nfs_rpc_ops nfs_v4_clientops = {
5032 .version = 4, /* protocol version */
5033 .dentry_ops = &nfs4_dentry_operations,
5034 .dir_inode_ops = &nfs4_dir_inode_operations,
5035 .file_inode_ops = &nfs4_file_inode_operations,
5036 .getroot = nfs4_proc_get_root,
5037 .getattr = nfs4_proc_getattr,
5038 .setattr = nfs4_proc_setattr,
5039 .lookupfh = nfs4_proc_lookupfh,
5040 .lookup = nfs4_proc_lookup,
5041 .access = nfs4_proc_access,
5042 .readlink = nfs4_proc_readlink,
5043 .create = nfs4_proc_create,
5044 .remove = nfs4_proc_remove,
5045 .unlink_setup = nfs4_proc_unlink_setup,
5046 .unlink_done = nfs4_proc_unlink_done,
5047 .rename = nfs4_proc_rename,
5048 .link = nfs4_proc_link,
5049 .symlink = nfs4_proc_symlink,
5050 .mkdir = nfs4_proc_mkdir,
5051 .rmdir = nfs4_proc_remove,
5052 .readdir = nfs4_proc_readdir,
5053 .mknod = nfs4_proc_mknod,
5054 .statfs = nfs4_proc_statfs,
5055 .fsinfo = nfs4_proc_fsinfo,
5056 .pathconf = nfs4_proc_pathconf,
5057 .set_capabilities = nfs4_server_capabilities,
5058 .decode_dirent = nfs4_decode_dirent,
5059 .read_setup = nfs4_proc_read_setup,
5060 .read_done = nfs4_read_done,
5061 .write_setup = nfs4_proc_write_setup,
5062 .write_done = nfs4_write_done,
5063 .commit_setup = nfs4_proc_commit_setup,
5064 .commit_done = nfs4_commit_done,
5065 .lock = nfs4_proc_lock,
5066 .clear_acl_cache = nfs4_zap_acl_attr,
5067 .close_context = nfs4_close_context,