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/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
203 nfs_wait_bit_killable, TASK_KILLABLE);
207 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
229 struct nfs_client *clp = server->nfs_client;
230 struct nfs4_state *state = exception->state;
233 exception->retry = 0;
237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
242 nfs4_state_mark_reclaim_nograce(clp, state);
243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
249 exception->retry = 1;
251 case -NFS4ERR_FILE_OPEN:
254 ret = nfs4_delay(server->client, &exception->timeout);
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
265 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
267 struct nfs_client *clp = server->nfs_client;
268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
274 #if defined(CONFIG_NFS_V4_1)
276 int _nfs4_call_sync_session(struct nfs_server *server,
277 struct rpc_message *msg,
278 struct nfs4_sequence_args *args,
279 struct nfs4_sequence_res *res,
282 /* in preparation for setting up the sequence op */
283 return rpc_call_sync(server->client, msg, 0);
286 #endif /* CONFIG_NFS_V4_1 */
288 int _nfs4_call_sync(struct nfs_server *server,
289 struct rpc_message *msg,
290 struct nfs4_sequence_args *args,
291 struct nfs4_sequence_res *res,
294 args->sa_session = res->sr_session = NULL;
295 return rpc_call_sync(server->client, msg, 0);
298 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
299 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
300 &(res)->seq_res, (cache_reply))
302 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
304 struct nfs_inode *nfsi = NFS_I(dir);
306 spin_lock(&dir->i_lock);
307 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
308 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
309 nfs_force_lookup_revalidate(dir);
310 nfsi->change_attr = cinfo->after;
311 spin_unlock(&dir->i_lock);
314 struct nfs4_opendata {
316 struct nfs_openargs o_arg;
317 struct nfs_openres o_res;
318 struct nfs_open_confirmargs c_arg;
319 struct nfs_open_confirmres c_res;
320 struct nfs_fattr f_attr;
321 struct nfs_fattr dir_attr;
324 struct nfs4_state_owner *owner;
325 struct nfs4_state *state;
327 unsigned long timestamp;
328 unsigned int rpc_done : 1;
334 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
336 p->o_res.f_attr = &p->f_attr;
337 p->o_res.dir_attr = &p->dir_attr;
338 p->o_res.seqid = p->o_arg.seqid;
339 p->c_res.seqid = p->c_arg.seqid;
340 p->o_res.server = p->o_arg.server;
341 nfs_fattr_init(&p->f_attr);
342 nfs_fattr_init(&p->dir_attr);
345 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
346 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
347 const struct iattr *attrs)
349 struct dentry *parent = dget_parent(path->dentry);
350 struct inode *dir = parent->d_inode;
351 struct nfs_server *server = NFS_SERVER(dir);
352 struct nfs4_opendata *p;
354 p = kzalloc(sizeof(*p), GFP_KERNEL);
357 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
358 if (p->o_arg.seqid == NULL)
360 p->path.mnt = mntget(path->mnt);
361 p->path.dentry = dget(path->dentry);
364 atomic_inc(&sp->so_count);
365 p->o_arg.fh = NFS_FH(dir);
366 p->o_arg.open_flags = flags;
367 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
368 p->o_arg.clientid = server->nfs_client->cl_clientid;
369 p->o_arg.id = sp->so_owner_id.id;
370 p->o_arg.name = &p->path.dentry->d_name;
371 p->o_arg.server = server;
372 p->o_arg.bitmask = server->attr_bitmask;
373 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
374 if (flags & O_EXCL) {
375 u32 *s = (u32 *) p->o_arg.u.verifier.data;
378 } else if (flags & O_CREAT) {
379 p->o_arg.u.attrs = &p->attrs;
380 memcpy(&p->attrs, attrs, sizeof(p->attrs));
382 p->c_arg.fh = &p->o_res.fh;
383 p->c_arg.stateid = &p->o_res.stateid;
384 p->c_arg.seqid = p->o_arg.seqid;
385 nfs4_init_opendata_res(p);
395 static void nfs4_opendata_free(struct kref *kref)
397 struct nfs4_opendata *p = container_of(kref,
398 struct nfs4_opendata, kref);
400 nfs_free_seqid(p->o_arg.seqid);
401 if (p->state != NULL)
402 nfs4_put_open_state(p->state);
403 nfs4_put_state_owner(p->owner);
409 static void nfs4_opendata_put(struct nfs4_opendata *p)
412 kref_put(&p->kref, nfs4_opendata_free);
415 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
419 ret = rpc_wait_for_completion_task(task);
423 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
427 if (open_mode & O_EXCL)
429 switch (mode & (FMODE_READ|FMODE_WRITE)) {
431 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
434 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
436 case FMODE_READ|FMODE_WRITE:
437 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
443 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
445 if ((delegation->type & fmode) != fmode)
447 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
449 nfs_mark_delegation_referenced(delegation);
453 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
462 case FMODE_READ|FMODE_WRITE:
465 nfs4_state_set_mode_locked(state, state->state | fmode);
468 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
470 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
471 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
472 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
475 set_bit(NFS_O_RDONLY_STATE, &state->flags);
478 set_bit(NFS_O_WRONLY_STATE, &state->flags);
480 case FMODE_READ|FMODE_WRITE:
481 set_bit(NFS_O_RDWR_STATE, &state->flags);
485 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
487 write_seqlock(&state->seqlock);
488 nfs_set_open_stateid_locked(state, stateid, fmode);
489 write_sequnlock(&state->seqlock);
492 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
495 * Protect the call to nfs4_state_set_mode_locked and
496 * serialise the stateid update
498 write_seqlock(&state->seqlock);
499 if (deleg_stateid != NULL) {
500 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
501 set_bit(NFS_DELEGATED_STATE, &state->flags);
503 if (open_stateid != NULL)
504 nfs_set_open_stateid_locked(state, open_stateid, fmode);
505 write_sequnlock(&state->seqlock);
506 spin_lock(&state->owner->so_lock);
507 update_open_stateflags(state, fmode);
508 spin_unlock(&state->owner->so_lock);
511 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
513 struct nfs_inode *nfsi = NFS_I(state->inode);
514 struct nfs_delegation *deleg_cur;
517 fmode &= (FMODE_READ|FMODE_WRITE);
520 deleg_cur = rcu_dereference(nfsi->delegation);
521 if (deleg_cur == NULL)
524 spin_lock(&deleg_cur->lock);
525 if (nfsi->delegation != deleg_cur ||
526 (deleg_cur->type & fmode) != fmode)
527 goto no_delegation_unlock;
529 if (delegation == NULL)
530 delegation = &deleg_cur->stateid;
531 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
532 goto no_delegation_unlock;
534 nfs_mark_delegation_referenced(deleg_cur);
535 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
537 no_delegation_unlock:
538 spin_unlock(&deleg_cur->lock);
542 if (!ret && open_stateid != NULL) {
543 __update_open_stateid(state, open_stateid, NULL, fmode);
551 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
553 struct nfs_delegation *delegation;
556 delegation = rcu_dereference(NFS_I(inode)->delegation);
557 if (delegation == NULL || (delegation->type & fmode) == fmode) {
562 nfs_inode_return_delegation(inode);
565 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
567 struct nfs4_state *state = opendata->state;
568 struct nfs_inode *nfsi = NFS_I(state->inode);
569 struct nfs_delegation *delegation;
570 int open_mode = opendata->o_arg.open_flags & O_EXCL;
571 fmode_t fmode = opendata->o_arg.fmode;
572 nfs4_stateid stateid;
576 if (can_open_cached(state, fmode, open_mode)) {
577 spin_lock(&state->owner->so_lock);
578 if (can_open_cached(state, fmode, open_mode)) {
579 update_open_stateflags(state, fmode);
580 spin_unlock(&state->owner->so_lock);
581 goto out_return_state;
583 spin_unlock(&state->owner->so_lock);
586 delegation = rcu_dereference(nfsi->delegation);
587 if (delegation == NULL ||
588 !can_open_delegated(delegation, fmode)) {
592 /* Save the delegation */
593 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
595 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
600 /* Try to update the stateid using the delegation */
601 if (update_open_stateid(state, NULL, &stateid, fmode))
602 goto out_return_state;
607 atomic_inc(&state->count);
611 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
614 struct nfs4_state *state = NULL;
615 struct nfs_delegation *delegation;
618 if (!data->rpc_done) {
619 state = nfs4_try_open_cached(data);
624 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
626 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
627 ret = PTR_ERR(inode);
631 state = nfs4_get_open_state(inode, data->owner);
634 if (data->o_res.delegation_type != 0) {
635 int delegation_flags = 0;
638 delegation = rcu_dereference(NFS_I(inode)->delegation);
640 delegation_flags = delegation->flags;
642 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
643 nfs_inode_set_delegation(state->inode,
644 data->owner->so_cred,
647 nfs_inode_reclaim_delegation(state->inode,
648 data->owner->so_cred,
652 update_open_stateid(state, &data->o_res.stateid, NULL,
663 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
665 struct nfs_inode *nfsi = NFS_I(state->inode);
666 struct nfs_open_context *ctx;
668 spin_lock(&state->inode->i_lock);
669 list_for_each_entry(ctx, &nfsi->open_files, list) {
670 if (ctx->state != state)
672 get_nfs_open_context(ctx);
673 spin_unlock(&state->inode->i_lock);
676 spin_unlock(&state->inode->i_lock);
677 return ERR_PTR(-ENOENT);
680 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
682 struct nfs4_opendata *opendata;
684 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
685 if (opendata == NULL)
686 return ERR_PTR(-ENOMEM);
687 opendata->state = state;
688 atomic_inc(&state->count);
692 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
694 struct nfs4_state *newstate;
697 opendata->o_arg.open_flags = 0;
698 opendata->o_arg.fmode = fmode;
699 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
700 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
701 nfs4_init_opendata_res(opendata);
702 ret = _nfs4_proc_open(opendata);
705 newstate = nfs4_opendata_to_nfs4_state(opendata);
706 if (IS_ERR(newstate))
707 return PTR_ERR(newstate);
708 nfs4_close_state(&opendata->path, newstate, fmode);
713 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
715 struct nfs4_state *newstate;
718 /* memory barrier prior to reading state->n_* */
719 clear_bit(NFS_DELEGATED_STATE, &state->flags);
721 if (state->n_rdwr != 0) {
722 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
725 if (newstate != state)
728 if (state->n_wronly != 0) {
729 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
732 if (newstate != state)
735 if (state->n_rdonly != 0) {
736 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
739 if (newstate != state)
743 * We may have performed cached opens for all three recoveries.
744 * Check if we need to update the current stateid.
746 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
747 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
748 write_seqlock(&state->seqlock);
749 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
750 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
751 write_sequnlock(&state->seqlock);
758 * reclaim state on the server after a reboot.
760 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
762 struct nfs_delegation *delegation;
763 struct nfs4_opendata *opendata;
764 fmode_t delegation_type = 0;
767 opendata = nfs4_open_recoverdata_alloc(ctx, state);
768 if (IS_ERR(opendata))
769 return PTR_ERR(opendata);
770 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
771 opendata->o_arg.fh = NFS_FH(state->inode);
773 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
774 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
775 delegation_type = delegation->type;
777 opendata->o_arg.u.delegation_type = delegation_type;
778 status = nfs4_open_recover(opendata, state);
779 nfs4_opendata_put(opendata);
783 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
785 struct nfs_server *server = NFS_SERVER(state->inode);
786 struct nfs4_exception exception = { };
789 err = _nfs4_do_open_reclaim(ctx, state);
790 if (err != -NFS4ERR_DELAY)
792 nfs4_handle_exception(server, err, &exception);
793 } while (exception.retry);
797 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
799 struct nfs_open_context *ctx;
802 ctx = nfs4_state_find_open_context(state);
805 ret = nfs4_do_open_reclaim(ctx, state);
806 put_nfs_open_context(ctx);
810 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
812 struct nfs4_opendata *opendata;
815 opendata = nfs4_open_recoverdata_alloc(ctx, state);
816 if (IS_ERR(opendata))
817 return PTR_ERR(opendata);
818 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
819 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
820 sizeof(opendata->o_arg.u.delegation.data));
821 ret = nfs4_open_recover(opendata, state);
822 nfs4_opendata_put(opendata);
826 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
828 struct nfs4_exception exception = { };
829 struct nfs_server *server = NFS_SERVER(state->inode);
832 err = _nfs4_open_delegation_recall(ctx, state, stateid);
836 case -NFS4ERR_STALE_CLIENTID:
837 case -NFS4ERR_STALE_STATEID:
838 case -NFS4ERR_EXPIRED:
839 /* Don't recall a delegation if it was lost */
840 nfs4_schedule_state_recovery(server->nfs_client);
843 err = nfs4_handle_exception(server, err, &exception);
844 } while (exception.retry);
848 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
850 struct nfs4_opendata *data = calldata;
852 data->rpc_status = task->tk_status;
853 if (RPC_ASSASSINATED(task))
855 if (data->rpc_status == 0) {
856 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
857 sizeof(data->o_res.stateid.data));
858 nfs_confirm_seqid(&data->owner->so_seqid, 0);
859 renew_lease(data->o_res.server, data->timestamp);
864 static void nfs4_open_confirm_release(void *calldata)
866 struct nfs4_opendata *data = calldata;
867 struct nfs4_state *state = NULL;
869 /* If this request hasn't been cancelled, do nothing */
870 if (data->cancelled == 0)
872 /* In case of error, no cleanup! */
875 state = nfs4_opendata_to_nfs4_state(data);
877 nfs4_close_state(&data->path, state, data->o_arg.fmode);
879 nfs4_opendata_put(data);
882 static const struct rpc_call_ops nfs4_open_confirm_ops = {
883 .rpc_call_done = nfs4_open_confirm_done,
884 .rpc_release = nfs4_open_confirm_release,
888 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
890 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
892 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
893 struct rpc_task *task;
894 struct rpc_message msg = {
895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
896 .rpc_argp = &data->c_arg,
897 .rpc_resp = &data->c_res,
898 .rpc_cred = data->owner->so_cred,
900 struct rpc_task_setup task_setup_data = {
901 .rpc_client = server->client,
903 .callback_ops = &nfs4_open_confirm_ops,
904 .callback_data = data,
905 .workqueue = nfsiod_workqueue,
906 .flags = RPC_TASK_ASYNC,
910 kref_get(&data->kref);
912 data->rpc_status = 0;
913 data->timestamp = jiffies;
914 task = rpc_run_task(&task_setup_data);
916 return PTR_ERR(task);
917 status = nfs4_wait_for_completion_rpc_task(task);
922 status = data->rpc_status;
927 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
929 struct nfs4_opendata *data = calldata;
930 struct nfs4_state_owner *sp = data->owner;
932 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
935 * Check if we still need to send an OPEN call, or if we can use
936 * a delegation instead.
938 if (data->state != NULL) {
939 struct nfs_delegation *delegation;
941 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
944 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
945 if (delegation != NULL &&
946 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
952 /* Update sequence id. */
953 data->o_arg.id = sp->so_owner_id.id;
954 data->o_arg.clientid = sp->so_client->cl_clientid;
955 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
956 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
957 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
959 data->timestamp = jiffies;
960 rpc_call_start(task);
963 task->tk_action = NULL;
967 static void nfs4_open_done(struct rpc_task *task, void *calldata)
969 struct nfs4_opendata *data = calldata;
971 data->rpc_status = task->tk_status;
972 if (RPC_ASSASSINATED(task))
974 if (task->tk_status == 0) {
975 switch (data->o_res.f_attr->mode & S_IFMT) {
979 data->rpc_status = -ELOOP;
982 data->rpc_status = -EISDIR;
985 data->rpc_status = -ENOTDIR;
987 renew_lease(data->o_res.server, data->timestamp);
988 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
989 nfs_confirm_seqid(&data->owner->so_seqid, 0);
994 static void nfs4_open_release(void *calldata)
996 struct nfs4_opendata *data = calldata;
997 struct nfs4_state *state = NULL;
999 /* If this request hasn't been cancelled, do nothing */
1000 if (data->cancelled == 0)
1002 /* In case of error, no cleanup! */
1003 if (data->rpc_status != 0 || !data->rpc_done)
1005 /* In case we need an open_confirm, no cleanup! */
1006 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1008 state = nfs4_opendata_to_nfs4_state(data);
1010 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1012 nfs4_opendata_put(data);
1015 static const struct rpc_call_ops nfs4_open_ops = {
1016 .rpc_call_prepare = nfs4_open_prepare,
1017 .rpc_call_done = nfs4_open_done,
1018 .rpc_release = nfs4_open_release,
1022 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1024 static int _nfs4_proc_open(struct nfs4_opendata *data)
1026 struct inode *dir = data->dir->d_inode;
1027 struct nfs_server *server = NFS_SERVER(dir);
1028 struct nfs_openargs *o_arg = &data->o_arg;
1029 struct nfs_openres *o_res = &data->o_res;
1030 struct rpc_task *task;
1031 struct rpc_message msg = {
1032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1035 .rpc_cred = data->owner->so_cred,
1037 struct rpc_task_setup task_setup_data = {
1038 .rpc_client = server->client,
1039 .rpc_message = &msg,
1040 .callback_ops = &nfs4_open_ops,
1041 .callback_data = data,
1042 .workqueue = nfsiod_workqueue,
1043 .flags = RPC_TASK_ASYNC,
1047 kref_get(&data->kref);
1049 data->rpc_status = 0;
1050 data->cancelled = 0;
1051 task = rpc_run_task(&task_setup_data);
1053 return PTR_ERR(task);
1054 status = nfs4_wait_for_completion_rpc_task(task);
1056 data->cancelled = 1;
1059 status = data->rpc_status;
1061 if (status != 0 || !data->rpc_done)
1064 if (o_res->fh.size == 0)
1065 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1067 if (o_arg->open_flags & O_CREAT) {
1068 update_changeattr(dir, &o_res->cinfo);
1069 nfs_post_op_update_inode(dir, o_res->dir_attr);
1071 nfs_refresh_inode(dir, o_res->dir_attr);
1072 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1073 status = _nfs4_proc_open_confirm(data);
1077 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1078 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1082 static int nfs4_recover_expired_lease(struct nfs_server *server)
1084 struct nfs_client *clp = server->nfs_client;
1088 ret = nfs4_wait_clnt_recover(clp);
1091 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1092 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1094 nfs4_schedule_state_recovery(clp);
1101 * reclaim state on the server after a network partition.
1102 * Assumes caller holds the appropriate lock
1104 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1106 struct nfs4_opendata *opendata;
1109 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1110 if (IS_ERR(opendata))
1111 return PTR_ERR(opendata);
1112 ret = nfs4_open_recover(opendata, state);
1114 d_drop(ctx->path.dentry);
1115 nfs4_opendata_put(opendata);
1119 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1121 struct nfs_server *server = NFS_SERVER(state->inode);
1122 struct nfs4_exception exception = { };
1126 err = _nfs4_open_expired(ctx, state);
1127 if (err != -NFS4ERR_DELAY)
1129 nfs4_handle_exception(server, err, &exception);
1130 } while (exception.retry);
1134 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1136 struct nfs_open_context *ctx;
1139 ctx = nfs4_state_find_open_context(state);
1141 return PTR_ERR(ctx);
1142 ret = nfs4_do_open_expired(ctx, state);
1143 put_nfs_open_context(ctx);
1148 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1149 * fields corresponding to attributes that were used to store the verifier.
1150 * Make sure we clobber those fields in the later setattr call
1152 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1154 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1155 !(sattr->ia_valid & ATTR_ATIME_SET))
1156 sattr->ia_valid |= ATTR_ATIME;
1158 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1159 !(sattr->ia_valid & ATTR_MTIME_SET))
1160 sattr->ia_valid |= ATTR_MTIME;
1164 * Returns a referenced nfs4_state
1166 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)
1168 struct nfs4_state_owner *sp;
1169 struct nfs4_state *state = NULL;
1170 struct nfs_server *server = NFS_SERVER(dir);
1171 struct nfs4_opendata *opendata;
1174 /* Protect against reboot recovery conflicts */
1176 if (!(sp = nfs4_get_state_owner(server, cred))) {
1177 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1180 status = nfs4_recover_expired_lease(server);
1182 goto err_put_state_owner;
1183 if (path->dentry->d_inode != NULL)
1184 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1186 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1187 if (opendata == NULL)
1188 goto err_put_state_owner;
1190 if (path->dentry->d_inode != NULL)
1191 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1193 status = _nfs4_proc_open(opendata);
1195 goto err_opendata_put;
1197 if (opendata->o_arg.open_flags & O_EXCL)
1198 nfs4_exclusive_attrset(opendata, sattr);
1200 state = nfs4_opendata_to_nfs4_state(opendata);
1201 status = PTR_ERR(state);
1203 goto err_opendata_put;
1204 nfs4_opendata_put(opendata);
1205 nfs4_put_state_owner(sp);
1209 nfs4_opendata_put(opendata);
1210 err_put_state_owner:
1211 nfs4_put_state_owner(sp);
1218 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)
1220 struct nfs4_exception exception = { };
1221 struct nfs4_state *res;
1225 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1228 /* NOTE: BAD_SEQID means the server and client disagree about the
1229 * book-keeping w.r.t. state-changing operations
1230 * (OPEN/CLOSE/LOCK/LOCKU...)
1231 * It is actually a sign of a bug on the client or on the server.
1233 * If we receive a BAD_SEQID error in the particular case of
1234 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1235 * have unhashed the old state_owner for us, and that we can
1236 * therefore safely retry using a new one. We should still warn
1237 * the user though...
1239 if (status == -NFS4ERR_BAD_SEQID) {
1240 printk(KERN_WARNING "NFS: v4 server %s "
1241 " returned a bad sequence-id error!\n",
1242 NFS_SERVER(dir)->nfs_client->cl_hostname);
1243 exception.retry = 1;
1247 * BAD_STATEID on OPEN means that the server cancelled our
1248 * state before it received the OPEN_CONFIRM.
1249 * Recover by retrying the request as per the discussion
1250 * on Page 181 of RFC3530.
1252 if (status == -NFS4ERR_BAD_STATEID) {
1253 exception.retry = 1;
1256 if (status == -EAGAIN) {
1257 /* We must have found a delegation */
1258 exception.retry = 1;
1261 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1262 status, &exception));
1263 } while (exception.retry);
1267 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1268 struct nfs_fattr *fattr, struct iattr *sattr,
1269 struct nfs4_state *state)
1271 struct nfs_server *server = NFS_SERVER(inode);
1272 struct nfs_setattrargs arg = {
1273 .fh = NFS_FH(inode),
1276 .bitmask = server->attr_bitmask,
1278 struct nfs_setattrres res = {
1282 struct rpc_message msg = {
1283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1288 unsigned long timestamp = jiffies;
1291 nfs_fattr_init(fattr);
1293 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1294 /* Use that stateid */
1295 } else if (state != NULL) {
1296 nfs4_copy_stateid(&arg.stateid, state, current->files);
1298 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1300 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1301 if (status == 0 && state != NULL)
1302 renew_lease(server, timestamp);
1306 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1307 struct nfs_fattr *fattr, struct iattr *sattr,
1308 struct nfs4_state *state)
1310 struct nfs_server *server = NFS_SERVER(inode);
1311 struct nfs4_exception exception = { };
1314 err = nfs4_handle_exception(server,
1315 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1317 } while (exception.retry);
1321 struct nfs4_closedata {
1323 struct inode *inode;
1324 struct nfs4_state *state;
1325 struct nfs_closeargs arg;
1326 struct nfs_closeres res;
1327 struct nfs_fattr fattr;
1328 unsigned long timestamp;
1331 static void nfs4_free_closedata(void *data)
1333 struct nfs4_closedata *calldata = data;
1334 struct nfs4_state_owner *sp = calldata->state->owner;
1336 nfs4_put_open_state(calldata->state);
1337 nfs_free_seqid(calldata->arg.seqid);
1338 nfs4_put_state_owner(sp);
1339 path_put(&calldata->path);
1343 static void nfs4_close_done(struct rpc_task *task, void *data)
1345 struct nfs4_closedata *calldata = data;
1346 struct nfs4_state *state = calldata->state;
1347 struct nfs_server *server = NFS_SERVER(calldata->inode);
1349 if (RPC_ASSASSINATED(task))
1351 /* hmm. we are done with the inode, and in the process of freeing
1352 * the state_owner. we keep this around to process errors
1354 switch (task->tk_status) {
1356 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1357 renew_lease(server, calldata->timestamp);
1359 case -NFS4ERR_STALE_STATEID:
1360 case -NFS4ERR_OLD_STATEID:
1361 case -NFS4ERR_BAD_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 if (calldata->arg.fmode == 0)
1366 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1367 rpc_restart_call(task);
1371 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1374 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1376 struct nfs4_closedata *calldata = data;
1377 struct nfs4_state *state = calldata->state;
1378 int clear_rd, clear_wr, clear_rdwr;
1380 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1383 clear_rd = clear_wr = clear_rdwr = 0;
1384 spin_lock(&state->owner->so_lock);
1385 /* Calculate the change in open mode */
1386 if (state->n_rdwr == 0) {
1387 if (state->n_rdonly == 0) {
1388 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1391 if (state->n_wronly == 0) {
1392 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1393 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1396 spin_unlock(&state->owner->so_lock);
1397 if (!clear_rd && !clear_wr && !clear_rdwr) {
1398 /* Note: exit _without_ calling nfs4_close_done */
1399 task->tk_action = NULL;
1402 nfs_fattr_init(calldata->res.fattr);
1403 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1404 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1405 calldata->arg.fmode = FMODE_READ;
1406 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1407 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1408 calldata->arg.fmode = FMODE_WRITE;
1410 calldata->timestamp = jiffies;
1411 rpc_call_start(task);
1414 static const struct rpc_call_ops nfs4_close_ops = {
1415 .rpc_call_prepare = nfs4_close_prepare,
1416 .rpc_call_done = nfs4_close_done,
1417 .rpc_release = nfs4_free_closedata,
1421 * It is possible for data to be read/written from a mem-mapped file
1422 * after the sys_close call (which hits the vfs layer as a flush).
1423 * This means that we can't safely call nfsv4 close on a file until
1424 * the inode is cleared. This in turn means that we are not good
1425 * NFSv4 citizens - we do not indicate to the server to update the file's
1426 * share state even when we are done with one of the three share
1427 * stateid's in the inode.
1429 * NOTE: Caller must be holding the sp->so_owner semaphore!
1431 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1433 struct nfs_server *server = NFS_SERVER(state->inode);
1434 struct nfs4_closedata *calldata;
1435 struct nfs4_state_owner *sp = state->owner;
1436 struct rpc_task *task;
1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1439 .rpc_cred = state->owner->so_cred,
1441 struct rpc_task_setup task_setup_data = {
1442 .rpc_client = server->client,
1443 .rpc_message = &msg,
1444 .callback_ops = &nfs4_close_ops,
1445 .workqueue = nfsiod_workqueue,
1446 .flags = RPC_TASK_ASYNC,
1448 int status = -ENOMEM;
1450 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1451 if (calldata == NULL)
1453 calldata->inode = state->inode;
1454 calldata->state = state;
1455 calldata->arg.fh = NFS_FH(state->inode);
1456 calldata->arg.stateid = &state->open_stateid;
1457 /* Serialization for the sequence id */
1458 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1459 if (calldata->arg.seqid == NULL)
1460 goto out_free_calldata;
1461 calldata->arg.fmode = 0;
1462 calldata->arg.bitmask = server->cache_consistency_bitmask;
1463 calldata->res.fattr = &calldata->fattr;
1464 calldata->res.seqid = calldata->arg.seqid;
1465 calldata->res.server = server;
1466 calldata->path.mnt = mntget(path->mnt);
1467 calldata->path.dentry = dget(path->dentry);
1469 msg.rpc_argp = &calldata->arg,
1470 msg.rpc_resp = &calldata->res,
1471 task_setup_data.callback_data = calldata;
1472 task = rpc_run_task(&task_setup_data);
1474 return PTR_ERR(task);
1477 status = rpc_wait_for_completion_task(task);
1483 nfs4_put_open_state(state);
1484 nfs4_put_state_owner(sp);
1488 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1493 /* If the open_intent is for execute, we have an extra check to make */
1494 if (fmode & FMODE_EXEC) {
1495 ret = nfs_may_open(state->inode,
1496 state->owner->so_cred,
1497 nd->intent.open.flags);
1501 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1502 if (!IS_ERR(filp)) {
1503 struct nfs_open_context *ctx;
1504 ctx = nfs_file_open_context(filp);
1508 ret = PTR_ERR(filp);
1510 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1515 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1517 struct path path = {
1518 .mnt = nd->path.mnt,
1521 struct dentry *parent;
1523 struct rpc_cred *cred;
1524 struct nfs4_state *state;
1526 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1528 if (nd->flags & LOOKUP_CREATE) {
1529 attr.ia_mode = nd->intent.open.create_mode;
1530 attr.ia_valid = ATTR_MODE;
1531 if (!IS_POSIXACL(dir))
1532 attr.ia_mode &= ~current_umask();
1535 BUG_ON(nd->intent.open.flags & O_CREAT);
1538 cred = rpc_lookup_cred();
1540 return (struct dentry *)cred;
1541 parent = dentry->d_parent;
1542 /* Protect against concurrent sillydeletes */
1543 nfs_block_sillyrename(parent);
1544 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1546 if (IS_ERR(state)) {
1547 if (PTR_ERR(state) == -ENOENT) {
1548 d_add(dentry, NULL);
1549 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1551 nfs_unblock_sillyrename(parent);
1552 return (struct dentry *)state;
1554 res = d_add_unique(dentry, igrab(state->inode));
1557 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1558 nfs_unblock_sillyrename(parent);
1559 nfs4_intent_set_file(nd, &path, state, fmode);
1564 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1566 struct path path = {
1567 .mnt = nd->path.mnt,
1570 struct rpc_cred *cred;
1571 struct nfs4_state *state;
1572 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1574 cred = rpc_lookup_cred();
1576 return PTR_ERR(cred);
1577 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1579 if (IS_ERR(state)) {
1580 switch (PTR_ERR(state)) {
1586 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1592 if (state->inode == dentry->d_inode) {
1593 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1594 nfs4_intent_set_file(nd, &path, state, fmode);
1597 nfs4_close_sync(&path, state, fmode);
1603 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1605 if (ctx->state == NULL)
1608 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1610 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1613 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1615 struct nfs4_server_caps_arg args = {
1618 struct nfs4_server_caps_res res = {};
1619 struct rpc_message msg = {
1620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1626 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1628 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1629 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1630 server->caps |= NFS_CAP_ACLS;
1631 if (res.has_links != 0)
1632 server->caps |= NFS_CAP_HARDLINKS;
1633 if (res.has_symlinks != 0)
1634 server->caps |= NFS_CAP_SYMLINKS;
1635 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1636 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1637 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1638 server->acl_bitmask = res.acl_bitmask;
1644 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1646 struct nfs4_exception exception = { };
1649 err = nfs4_handle_exception(server,
1650 _nfs4_server_capabilities(server, fhandle),
1652 } while (exception.retry);
1656 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1657 struct nfs_fsinfo *info)
1659 struct nfs4_lookup_root_arg args = {
1660 .bitmask = nfs4_fattr_bitmap,
1662 struct nfs4_lookup_res res = {
1664 .fattr = info->fattr,
1667 struct rpc_message msg = {
1668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1672 nfs_fattr_init(info->fattr);
1673 return nfs4_call_sync(server, &msg, &args, &res, 0);
1676 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1677 struct nfs_fsinfo *info)
1679 struct nfs4_exception exception = { };
1682 err = nfs4_handle_exception(server,
1683 _nfs4_lookup_root(server, fhandle, info),
1685 } while (exception.retry);
1690 * get the file handle for the "/" directory on the server
1692 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1693 struct nfs_fsinfo *info)
1697 status = nfs4_lookup_root(server, fhandle, info);
1699 status = nfs4_server_capabilities(server, fhandle);
1701 status = nfs4_do_fsinfo(server, fhandle, info);
1702 return nfs4_map_errors(status);
1706 * Get locations and (maybe) other attributes of a referral.
1707 * Note that we'll actually follow the referral later when
1708 * we detect fsid mismatch in inode revalidation
1710 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1712 int status = -ENOMEM;
1713 struct page *page = NULL;
1714 struct nfs4_fs_locations *locations = NULL;
1716 page = alloc_page(GFP_KERNEL);
1719 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1720 if (locations == NULL)
1723 status = nfs4_proc_fs_locations(dir, name, locations, page);
1726 /* Make sure server returned a different fsid for the referral */
1727 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1728 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1733 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1734 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1736 fattr->mode = S_IFDIR;
1737 memset(fhandle, 0, sizeof(struct nfs_fh));
1746 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1748 struct nfs4_getattr_arg args = {
1750 .bitmask = server->attr_bitmask,
1752 struct nfs4_getattr_res res = {
1756 struct rpc_message msg = {
1757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1762 nfs_fattr_init(fattr);
1763 return nfs4_call_sync(server, &msg, &args, &res, 0);
1766 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1768 struct nfs4_exception exception = { };
1771 err = nfs4_handle_exception(server,
1772 _nfs4_proc_getattr(server, fhandle, fattr),
1774 } while (exception.retry);
1779 * The file is not closed if it is opened due to the a request to change
1780 * the size of the file. The open call will not be needed once the
1781 * VFS layer lookup-intents are implemented.
1783 * Close is called when the inode is destroyed.
1784 * If we haven't opened the file for O_WRONLY, we
1785 * need to in the size_change case to obtain a stateid.
1788 * Because OPEN is always done by name in nfsv4, it is
1789 * possible that we opened a different file by the same
1790 * name. We can recognize this race condition, but we
1791 * can't do anything about it besides returning an error.
1793 * This will be fixed with VFS changes (lookup-intent).
1796 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1797 struct iattr *sattr)
1799 struct inode *inode = dentry->d_inode;
1800 struct rpc_cred *cred = NULL;
1801 struct nfs4_state *state = NULL;
1804 nfs_fattr_init(fattr);
1806 /* Search for an existing open(O_WRITE) file */
1807 if (sattr->ia_valid & ATTR_FILE) {
1808 struct nfs_open_context *ctx;
1810 ctx = nfs_file_open_context(sattr->ia_file);
1817 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1819 nfs_setattr_update_inode(inode, sattr);
1823 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1824 const struct qstr *name, struct nfs_fh *fhandle,
1825 struct nfs_fattr *fattr)
1828 struct nfs4_lookup_arg args = {
1829 .bitmask = server->attr_bitmask,
1833 struct nfs4_lookup_res res = {
1838 struct rpc_message msg = {
1839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1844 nfs_fattr_init(fattr);
1846 dprintk("NFS call lookupfh %s\n", name->name);
1847 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1848 dprintk("NFS reply lookupfh: %d\n", status);
1852 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1853 struct qstr *name, struct nfs_fh *fhandle,
1854 struct nfs_fattr *fattr)
1856 struct nfs4_exception exception = { };
1859 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1861 if (err == -NFS4ERR_MOVED) {
1865 err = nfs4_handle_exception(server, err, &exception);
1866 } while (exception.retry);
1870 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1871 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1875 dprintk("NFS call lookup %s\n", name->name);
1876 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1877 if (status == -NFS4ERR_MOVED)
1878 status = nfs4_get_referral(dir, name, fattr, fhandle);
1879 dprintk("NFS reply lookup: %d\n", status);
1883 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1885 struct nfs4_exception exception = { };
1888 err = nfs4_handle_exception(NFS_SERVER(dir),
1889 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1891 } while (exception.retry);
1895 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1897 struct nfs_server *server = NFS_SERVER(inode);
1898 struct nfs_fattr fattr;
1899 struct nfs4_accessargs args = {
1900 .fh = NFS_FH(inode),
1901 .bitmask = server->attr_bitmask,
1903 struct nfs4_accessres res = {
1907 struct rpc_message msg = {
1908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1911 .rpc_cred = entry->cred,
1913 int mode = entry->mask;
1917 * Determine which access bits we want to ask for...
1919 if (mode & MAY_READ)
1920 args.access |= NFS4_ACCESS_READ;
1921 if (S_ISDIR(inode->i_mode)) {
1922 if (mode & MAY_WRITE)
1923 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1924 if (mode & MAY_EXEC)
1925 args.access |= NFS4_ACCESS_LOOKUP;
1927 if (mode & MAY_WRITE)
1928 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1929 if (mode & MAY_EXEC)
1930 args.access |= NFS4_ACCESS_EXECUTE;
1932 nfs_fattr_init(&fattr);
1933 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1936 if (res.access & NFS4_ACCESS_READ)
1937 entry->mask |= MAY_READ;
1938 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1939 entry->mask |= MAY_WRITE;
1940 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1941 entry->mask |= MAY_EXEC;
1942 nfs_refresh_inode(inode, &fattr);
1947 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1949 struct nfs4_exception exception = { };
1952 err = nfs4_handle_exception(NFS_SERVER(inode),
1953 _nfs4_proc_access(inode, entry),
1955 } while (exception.retry);
1960 * TODO: For the time being, we don't try to get any attributes
1961 * along with any of the zero-copy operations READ, READDIR,
1964 * In the case of the first three, we want to put the GETATTR
1965 * after the read-type operation -- this is because it is hard
1966 * to predict the length of a GETATTR response in v4, and thus
1967 * align the READ data correctly. This means that the GETATTR
1968 * may end up partially falling into the page cache, and we should
1969 * shift it into the 'tail' of the xdr_buf before processing.
1970 * To do this efficiently, we need to know the total length
1971 * of data received, which doesn't seem to be available outside
1974 * In the case of WRITE, we also want to put the GETATTR after
1975 * the operation -- in this case because we want to make sure
1976 * we get the post-operation mtime and size. This means that
1977 * we can't use xdr_encode_pages() as written: we need a variant
1978 * of it which would leave room in the 'tail' iovec.
1980 * Both of these changes to the XDR layer would in fact be quite
1981 * minor, but I decided to leave them for a subsequent patch.
1983 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1984 unsigned int pgbase, unsigned int pglen)
1986 struct nfs4_readlink args = {
1987 .fh = NFS_FH(inode),
1992 struct nfs4_readlink_res res;
1993 struct rpc_message msg = {
1994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1999 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2002 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2003 unsigned int pgbase, unsigned int pglen)
2005 struct nfs4_exception exception = { };
2008 err = nfs4_handle_exception(NFS_SERVER(inode),
2009 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2011 } while (exception.retry);
2017 * We will need to arrange for the VFS layer to provide an atomic open.
2018 * Until then, this create/open method is prone to inefficiency and race
2019 * conditions due to the lookup, create, and open VFS calls from sys_open()
2020 * placed on the wire.
2022 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2023 * The file will be opened again in the subsequent VFS open call
2024 * (nfs4_proc_file_open).
2026 * The open for read will just hang around to be used by any process that
2027 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2031 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2032 int flags, struct nameidata *nd)
2034 struct path path = {
2035 .mnt = nd->path.mnt,
2038 struct nfs4_state *state;
2039 struct rpc_cred *cred;
2040 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2043 cred = rpc_lookup_cred();
2045 status = PTR_ERR(cred);
2048 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2050 if (IS_ERR(state)) {
2051 status = PTR_ERR(state);
2054 d_add(dentry, igrab(state->inode));
2055 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2056 if (flags & O_EXCL) {
2057 struct nfs_fattr fattr;
2058 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2060 nfs_setattr_update_inode(state->inode, sattr);
2061 nfs_post_op_update_inode(state->inode, &fattr);
2063 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2064 status = nfs4_intent_set_file(nd, &path, state, fmode);
2066 nfs4_close_sync(&path, state, fmode);
2073 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2075 struct nfs_server *server = NFS_SERVER(dir);
2076 struct nfs_removeargs args = {
2078 .name.len = name->len,
2079 .name.name = name->name,
2080 .bitmask = server->attr_bitmask,
2082 struct nfs_removeres res = {
2085 struct rpc_message msg = {
2086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2092 nfs_fattr_init(&res.dir_attr);
2093 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2095 update_changeattr(dir, &res.cinfo);
2096 nfs_post_op_update_inode(dir, &res.dir_attr);
2101 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2103 struct nfs4_exception exception = { };
2106 err = nfs4_handle_exception(NFS_SERVER(dir),
2107 _nfs4_proc_remove(dir, name),
2109 } while (exception.retry);
2113 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2115 struct nfs_server *server = NFS_SERVER(dir);
2116 struct nfs_removeargs *args = msg->rpc_argp;
2117 struct nfs_removeres *res = msg->rpc_resp;
2119 args->bitmask = server->cache_consistency_bitmask;
2120 res->server = server;
2121 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2124 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2126 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2128 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2130 update_changeattr(dir, &res->cinfo);
2131 nfs_post_op_update_inode(dir, &res->dir_attr);
2135 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2136 struct inode *new_dir, struct qstr *new_name)
2138 struct nfs_server *server = NFS_SERVER(old_dir);
2139 struct nfs4_rename_arg arg = {
2140 .old_dir = NFS_FH(old_dir),
2141 .new_dir = NFS_FH(new_dir),
2142 .old_name = old_name,
2143 .new_name = new_name,
2144 .bitmask = server->attr_bitmask,
2146 struct nfs_fattr old_fattr, new_fattr;
2147 struct nfs4_rename_res res = {
2149 .old_fattr = &old_fattr,
2150 .new_fattr = &new_fattr,
2152 struct rpc_message msg = {
2153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2159 nfs_fattr_init(res.old_fattr);
2160 nfs_fattr_init(res.new_fattr);
2161 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2164 update_changeattr(old_dir, &res.old_cinfo);
2165 nfs_post_op_update_inode(old_dir, res.old_fattr);
2166 update_changeattr(new_dir, &res.new_cinfo);
2167 nfs_post_op_update_inode(new_dir, res.new_fattr);
2172 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2173 struct inode *new_dir, struct qstr *new_name)
2175 struct nfs4_exception exception = { };
2178 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2179 _nfs4_proc_rename(old_dir, old_name,
2182 } while (exception.retry);
2186 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2188 struct nfs_server *server = NFS_SERVER(inode);
2189 struct nfs4_link_arg arg = {
2190 .fh = NFS_FH(inode),
2191 .dir_fh = NFS_FH(dir),
2193 .bitmask = server->attr_bitmask,
2195 struct nfs_fattr fattr, dir_attr;
2196 struct nfs4_link_res res = {
2199 .dir_attr = &dir_attr,
2201 struct rpc_message msg = {
2202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2208 nfs_fattr_init(res.fattr);
2209 nfs_fattr_init(res.dir_attr);
2210 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2212 update_changeattr(dir, &res.cinfo);
2213 nfs_post_op_update_inode(dir, res.dir_attr);
2214 nfs_post_op_update_inode(inode, res.fattr);
2220 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2222 struct nfs4_exception exception = { };
2225 err = nfs4_handle_exception(NFS_SERVER(inode),
2226 _nfs4_proc_link(inode, dir, name),
2228 } while (exception.retry);
2232 struct nfs4_createdata {
2233 struct rpc_message msg;
2234 struct nfs4_create_arg arg;
2235 struct nfs4_create_res res;
2237 struct nfs_fattr fattr;
2238 struct nfs_fattr dir_fattr;
2241 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2242 struct qstr *name, struct iattr *sattr, u32 ftype)
2244 struct nfs4_createdata *data;
2246 data = kzalloc(sizeof(*data), GFP_KERNEL);
2248 struct nfs_server *server = NFS_SERVER(dir);
2250 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2251 data->msg.rpc_argp = &data->arg;
2252 data->msg.rpc_resp = &data->res;
2253 data->arg.dir_fh = NFS_FH(dir);
2254 data->arg.server = server;
2255 data->arg.name = name;
2256 data->arg.attrs = sattr;
2257 data->arg.ftype = ftype;
2258 data->arg.bitmask = server->attr_bitmask;
2259 data->res.server = server;
2260 data->res.fh = &data->fh;
2261 data->res.fattr = &data->fattr;
2262 data->res.dir_fattr = &data->dir_fattr;
2263 nfs_fattr_init(data->res.fattr);
2264 nfs_fattr_init(data->res.dir_fattr);
2269 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2271 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2272 &data->arg, &data->res, 1);
2274 update_changeattr(dir, &data->res.dir_cinfo);
2275 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2276 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2281 static void nfs4_free_createdata(struct nfs4_createdata *data)
2286 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2287 struct page *page, unsigned int len, struct iattr *sattr)
2289 struct nfs4_createdata *data;
2290 int status = -ENAMETOOLONG;
2292 if (len > NFS4_MAXPATHLEN)
2296 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2300 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2301 data->arg.u.symlink.pages = &page;
2302 data->arg.u.symlink.len = len;
2304 status = nfs4_do_create(dir, dentry, data);
2306 nfs4_free_createdata(data);
2311 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2312 struct page *page, unsigned int len, struct iattr *sattr)
2314 struct nfs4_exception exception = { };
2317 err = nfs4_handle_exception(NFS_SERVER(dir),
2318 _nfs4_proc_symlink(dir, dentry, page,
2321 } while (exception.retry);
2325 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2326 struct iattr *sattr)
2328 struct nfs4_createdata *data;
2329 int status = -ENOMEM;
2331 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2335 status = nfs4_do_create(dir, dentry, data);
2337 nfs4_free_createdata(data);
2342 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2343 struct iattr *sattr)
2345 struct nfs4_exception exception = { };
2348 err = nfs4_handle_exception(NFS_SERVER(dir),
2349 _nfs4_proc_mkdir(dir, dentry, sattr),
2351 } while (exception.retry);
2355 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2356 u64 cookie, struct page *page, unsigned int count, int plus)
2358 struct inode *dir = dentry->d_inode;
2359 struct nfs4_readdir_arg args = {
2364 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2366 struct nfs4_readdir_res res;
2367 struct rpc_message msg = {
2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2375 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2376 dentry->d_parent->d_name.name,
2377 dentry->d_name.name,
2378 (unsigned long long)cookie);
2379 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2380 res.pgbase = args.pgbase;
2381 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2383 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2385 nfs_invalidate_atime(dir);
2387 dprintk("%s: returns %d\n", __func__, status);
2391 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2392 u64 cookie, struct page *page, unsigned int count, int plus)
2394 struct nfs4_exception exception = { };
2397 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2398 _nfs4_proc_readdir(dentry, cred, cookie,
2401 } while (exception.retry);
2405 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2406 struct iattr *sattr, dev_t rdev)
2408 struct nfs4_createdata *data;
2409 int mode = sattr->ia_mode;
2410 int status = -ENOMEM;
2412 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2413 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2415 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2420 data->arg.ftype = NF4FIFO;
2421 else if (S_ISBLK(mode)) {
2422 data->arg.ftype = NF4BLK;
2423 data->arg.u.device.specdata1 = MAJOR(rdev);
2424 data->arg.u.device.specdata2 = MINOR(rdev);
2426 else if (S_ISCHR(mode)) {
2427 data->arg.ftype = NF4CHR;
2428 data->arg.u.device.specdata1 = MAJOR(rdev);
2429 data->arg.u.device.specdata2 = MINOR(rdev);
2432 status = nfs4_do_create(dir, dentry, data);
2434 nfs4_free_createdata(data);
2439 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2440 struct iattr *sattr, dev_t rdev)
2442 struct nfs4_exception exception = { };
2445 err = nfs4_handle_exception(NFS_SERVER(dir),
2446 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2448 } while (exception.retry);
2452 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2453 struct nfs_fsstat *fsstat)
2455 struct nfs4_statfs_arg args = {
2457 .bitmask = server->attr_bitmask,
2459 struct nfs4_statfs_res res = {
2462 struct rpc_message msg = {
2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2468 nfs_fattr_init(fsstat->fattr);
2469 return nfs4_call_sync(server, &msg, &args, &res, 0);
2472 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2474 struct nfs4_exception exception = { };
2477 err = nfs4_handle_exception(server,
2478 _nfs4_proc_statfs(server, fhandle, fsstat),
2480 } while (exception.retry);
2484 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2485 struct nfs_fsinfo *fsinfo)
2487 struct nfs4_fsinfo_arg args = {
2489 .bitmask = server->attr_bitmask,
2491 struct nfs4_fsinfo_res res = {
2494 struct rpc_message msg = {
2495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2500 return nfs4_call_sync(server, &msg, &args, &res, 0);
2503 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2505 struct nfs4_exception exception = { };
2509 err = nfs4_handle_exception(server,
2510 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2512 } while (exception.retry);
2516 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2518 nfs_fattr_init(fsinfo->fattr);
2519 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2522 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2523 struct nfs_pathconf *pathconf)
2525 struct nfs4_pathconf_arg args = {
2527 .bitmask = server->attr_bitmask,
2529 struct nfs4_pathconf_res res = {
2530 .pathconf = pathconf,
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2538 /* None of the pathconf attributes are mandatory to implement */
2539 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2540 memset(pathconf, 0, sizeof(*pathconf));
2544 nfs_fattr_init(pathconf->fattr);
2545 return nfs4_call_sync(server, &msg, &args, &res, 0);
2548 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2549 struct nfs_pathconf *pathconf)
2551 struct nfs4_exception exception = { };
2555 err = nfs4_handle_exception(server,
2556 _nfs4_proc_pathconf(server, fhandle, pathconf),
2558 } while (exception.retry);
2562 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2564 struct nfs_server *server = NFS_SERVER(data->inode);
2566 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2567 rpc_restart_call(task);
2571 nfs_invalidate_atime(data->inode);
2572 if (task->tk_status > 0)
2573 renew_lease(server, data->timestamp);
2577 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2579 data->timestamp = jiffies;
2580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2583 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2585 struct inode *inode = data->inode;
2587 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2588 rpc_restart_call(task);
2591 if (task->tk_status >= 0) {
2592 renew_lease(NFS_SERVER(inode), data->timestamp);
2593 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2598 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2600 struct nfs_server *server = NFS_SERVER(data->inode);
2602 data->args.bitmask = server->cache_consistency_bitmask;
2603 data->res.server = server;
2604 data->timestamp = jiffies;
2606 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2609 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2611 struct inode *inode = data->inode;
2613 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2614 rpc_restart_call(task);
2617 nfs_refresh_inode(inode, data->res.fattr);
2621 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2623 struct nfs_server *server = NFS_SERVER(data->inode);
2625 data->args.bitmask = server->cache_consistency_bitmask;
2626 data->res.server = server;
2627 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2631 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2632 * standalone procedure for queueing an asynchronous RENEW.
2634 static void nfs4_renew_done(struct rpc_task *task, void *data)
2636 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2637 unsigned long timestamp = (unsigned long)data;
2639 if (task->tk_status < 0) {
2640 /* Unless we're shutting down, schedule state recovery! */
2641 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2642 nfs4_schedule_state_recovery(clp);
2645 spin_lock(&clp->cl_lock);
2646 if (time_before(clp->cl_last_renewal,timestamp))
2647 clp->cl_last_renewal = timestamp;
2648 spin_unlock(&clp->cl_lock);
2651 static const struct rpc_call_ops nfs4_renew_ops = {
2652 .rpc_call_done = nfs4_renew_done,
2655 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2657 struct rpc_message msg = {
2658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2663 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2664 &nfs4_renew_ops, (void *)jiffies);
2667 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2669 struct rpc_message msg = {
2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2674 unsigned long now = jiffies;
2677 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2680 spin_lock(&clp->cl_lock);
2681 if (time_before(clp->cl_last_renewal,now))
2682 clp->cl_last_renewal = now;
2683 spin_unlock(&clp->cl_lock);
2687 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2689 return (server->caps & NFS_CAP_ACLS)
2690 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2691 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2694 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2695 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2698 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2700 static void buf_to_pages(const void *buf, size_t buflen,
2701 struct page **pages, unsigned int *pgbase)
2703 const void *p = buf;
2705 *pgbase = offset_in_page(buf);
2707 while (p < buf + buflen) {
2708 *(pages++) = virt_to_page(p);
2709 p += PAGE_CACHE_SIZE;
2713 struct nfs4_cached_acl {
2719 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2721 struct nfs_inode *nfsi = NFS_I(inode);
2723 spin_lock(&inode->i_lock);
2724 kfree(nfsi->nfs4_acl);
2725 nfsi->nfs4_acl = acl;
2726 spin_unlock(&inode->i_lock);
2729 static void nfs4_zap_acl_attr(struct inode *inode)
2731 nfs4_set_cached_acl(inode, NULL);
2734 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2736 struct nfs_inode *nfsi = NFS_I(inode);
2737 struct nfs4_cached_acl *acl;
2740 spin_lock(&inode->i_lock);
2741 acl = nfsi->nfs4_acl;
2744 if (buf == NULL) /* user is just asking for length */
2746 if (acl->cached == 0)
2748 ret = -ERANGE; /* see getxattr(2) man page */
2749 if (acl->len > buflen)
2751 memcpy(buf, acl->data, acl->len);
2755 spin_unlock(&inode->i_lock);
2759 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2761 struct nfs4_cached_acl *acl;
2763 if (buf && acl_len <= PAGE_SIZE) {
2764 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2768 memcpy(acl->data, buf, acl_len);
2770 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2777 nfs4_set_cached_acl(inode, acl);
2780 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2782 struct page *pages[NFS4ACL_MAXPAGES];
2783 struct nfs_getaclargs args = {
2784 .fh = NFS_FH(inode),
2788 struct nfs_getaclres res = {
2792 struct rpc_message msg = {
2793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2797 struct page *localpage = NULL;
2800 if (buflen < PAGE_SIZE) {
2801 /* As long as we're doing a round trip to the server anyway,
2802 * let's be prepared for a page of acl data. */
2803 localpage = alloc_page(GFP_KERNEL);
2804 resp_buf = page_address(localpage);
2805 if (localpage == NULL)
2807 args.acl_pages[0] = localpage;
2808 args.acl_pgbase = 0;
2809 args.acl_len = PAGE_SIZE;
2812 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2814 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2817 if (res.acl_len > args.acl_len)
2818 nfs4_write_cached_acl(inode, NULL, res.acl_len);
2820 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
2823 if (res.acl_len > buflen)
2826 memcpy(buf, resp_buf, res.acl_len);
2831 __free_page(localpage);
2835 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2837 struct nfs4_exception exception = { };
2840 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2843 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2844 } while (exception.retry);
2848 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2850 struct nfs_server *server = NFS_SERVER(inode);
2853 if (!nfs4_server_supports_acls(server))
2855 ret = nfs_revalidate_inode(server, inode);
2858 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2859 nfs_zap_acl_cache(inode);
2860 ret = nfs4_read_cached_acl(inode, buf, buflen);
2863 return nfs4_get_acl_uncached(inode, buf, buflen);
2866 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2868 struct nfs_server *server = NFS_SERVER(inode);
2869 struct page *pages[NFS4ACL_MAXPAGES];
2870 struct nfs_setaclargs arg = {
2871 .fh = NFS_FH(inode),
2875 struct nfs_setaclres res;
2876 struct rpc_message msg = {
2877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2883 if (!nfs4_server_supports_acls(server))
2885 nfs_inode_return_delegation(inode);
2886 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2887 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
2888 nfs_access_zap_cache(inode);
2889 nfs_zap_acl_cache(inode);
2893 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2895 struct nfs4_exception exception = { };
2898 err = nfs4_handle_exception(NFS_SERVER(inode),
2899 __nfs4_proc_set_acl(inode, buf, buflen),
2901 } while (exception.retry);
2906 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
2908 struct nfs_client *clp = server->nfs_client;
2910 if (!clp || task->tk_status >= 0)
2912 switch(task->tk_status) {
2913 case -NFS4ERR_ADMIN_REVOKED:
2914 case -NFS4ERR_BAD_STATEID:
2915 case -NFS4ERR_OPENMODE:
2918 nfs4_state_mark_reclaim_nograce(clp, state);
2919 case -NFS4ERR_STALE_CLIENTID:
2920 case -NFS4ERR_STALE_STATEID:
2921 case -NFS4ERR_EXPIRED:
2922 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2923 nfs4_schedule_state_recovery(clp);
2924 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
2925 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2926 task->tk_status = 0;
2928 case -NFS4ERR_DELAY:
2929 nfs_inc_server_stats(server, NFSIOS_DELAY);
2930 case -NFS4ERR_GRACE:
2931 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2932 task->tk_status = 0;
2934 case -NFS4ERR_OLD_STATEID:
2935 task->tk_status = 0;
2938 task->tk_status = nfs4_map_errors(task->tk_status);
2942 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2944 nfs4_verifier sc_verifier;
2945 struct nfs4_setclientid setclientid = {
2946 .sc_verifier = &sc_verifier,
2949 struct rpc_message msg = {
2950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2951 .rpc_argp = &setclientid,
2959 p = (__be32*)sc_verifier.data;
2960 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2961 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2964 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2965 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2967 rpc_peeraddr2str(clp->cl_rpcclient,
2969 rpc_peeraddr2str(clp->cl_rpcclient,
2971 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2972 clp->cl_id_uniquifier);
2973 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2974 sizeof(setclientid.sc_netid),
2975 rpc_peeraddr2str(clp->cl_rpcclient,
2976 RPC_DISPLAY_NETID));
2977 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2978 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2979 clp->cl_ipaddr, port >> 8, port & 255);
2981 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2982 if (status != -NFS4ERR_CLID_INUSE)
2987 ssleep(clp->cl_lease_time + 1);
2989 if (++clp->cl_id_uniquifier == 0)
2995 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2997 struct nfs_fsinfo fsinfo;
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3001 .rpc_resp = &fsinfo,
3008 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3010 spin_lock(&clp->cl_lock);
3011 clp->cl_lease_time = fsinfo.lease_time * HZ;
3012 clp->cl_last_renewal = now;
3013 spin_unlock(&clp->cl_lock);
3018 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3023 err = _nfs4_proc_setclientid_confirm(clp, cred);
3027 case -NFS4ERR_RESOURCE:
3028 /* The IBM lawyers misread another document! */
3029 case -NFS4ERR_DELAY:
3030 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3036 struct nfs4_delegreturndata {
3037 struct nfs4_delegreturnargs args;
3038 struct nfs4_delegreturnres res;
3040 nfs4_stateid stateid;
3041 unsigned long timestamp;
3042 struct nfs_fattr fattr;
3046 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3048 struct nfs4_delegreturndata *data = calldata;
3049 data->rpc_status = task->tk_status;
3050 if (data->rpc_status == 0)
3051 renew_lease(data->res.server, data->timestamp);
3054 static void nfs4_delegreturn_release(void *calldata)
3059 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3060 .rpc_call_done = nfs4_delegreturn_done,
3061 .rpc_release = nfs4_delegreturn_release,
3064 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3066 struct nfs4_delegreturndata *data;
3067 struct nfs_server *server = NFS_SERVER(inode);
3068 struct rpc_task *task;
3069 struct rpc_message msg = {
3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3073 struct rpc_task_setup task_setup_data = {
3074 .rpc_client = server->client,
3075 .rpc_message = &msg,
3076 .callback_ops = &nfs4_delegreturn_ops,
3077 .flags = RPC_TASK_ASYNC,
3081 data = kmalloc(sizeof(*data), GFP_KERNEL);
3084 data->args.fhandle = &data->fh;
3085 data->args.stateid = &data->stateid;
3086 data->args.bitmask = server->attr_bitmask;
3087 nfs_copy_fh(&data->fh, NFS_FH(inode));
3088 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3089 data->res.fattr = &data->fattr;
3090 data->res.server = server;
3091 nfs_fattr_init(data->res.fattr);
3092 data->timestamp = jiffies;
3093 data->rpc_status = 0;
3095 task_setup_data.callback_data = data;
3096 msg.rpc_argp = &data->args,
3097 msg.rpc_resp = &data->res,
3098 task = rpc_run_task(&task_setup_data);
3100 return PTR_ERR(task);
3103 status = nfs4_wait_for_completion_rpc_task(task);
3106 status = data->rpc_status;
3109 nfs_refresh_inode(inode, &data->fattr);
3115 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3117 struct nfs_server *server = NFS_SERVER(inode);
3118 struct nfs4_exception exception = { };
3121 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3123 case -NFS4ERR_STALE_STATEID:
3124 case -NFS4ERR_EXPIRED:
3128 err = nfs4_handle_exception(server, err, &exception);
3129 } while (exception.retry);
3133 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3134 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3137 * sleep, with exponential backoff, and retry the LOCK operation.
3139 static unsigned long
3140 nfs4_set_lock_task_retry(unsigned long timeout)
3142 schedule_timeout_killable(timeout);
3144 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3145 return NFS4_LOCK_MAXTIMEOUT;
3149 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3151 struct inode *inode = state->inode;
3152 struct nfs_server *server = NFS_SERVER(inode);
3153 struct nfs_client *clp = server->nfs_client;
3154 struct nfs_lockt_args arg = {
3155 .fh = NFS_FH(inode),
3158 struct nfs_lockt_res res = {
3161 struct rpc_message msg = {
3162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3165 .rpc_cred = state->owner->so_cred,
3167 struct nfs4_lock_state *lsp;
3170 arg.lock_owner.clientid = clp->cl_clientid;
3171 status = nfs4_set_lock_state(state, request);
3174 lsp = request->fl_u.nfs4_fl.owner;
3175 arg.lock_owner.id = lsp->ls_id.id;
3176 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3179 request->fl_type = F_UNLCK;
3181 case -NFS4ERR_DENIED:
3184 request->fl_ops->fl_release_private(request);
3189 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3191 struct nfs4_exception exception = { };
3195 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3196 _nfs4_proc_getlk(state, cmd, request),
3198 } while (exception.retry);
3202 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3205 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3207 res = posix_lock_file_wait(file, fl);
3210 res = flock_lock_file_wait(file, fl);
3218 struct nfs4_unlockdata {
3219 struct nfs_locku_args arg;
3220 struct nfs_locku_res res;
3221 struct nfs4_lock_state *lsp;
3222 struct nfs_open_context *ctx;
3223 struct file_lock fl;
3224 const struct nfs_server *server;
3225 unsigned long timestamp;
3228 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3229 struct nfs_open_context *ctx,
3230 struct nfs4_lock_state *lsp,
3231 struct nfs_seqid *seqid)
3233 struct nfs4_unlockdata *p;
3234 struct inode *inode = lsp->ls_state->inode;
3236 p = kmalloc(sizeof(*p), GFP_KERNEL);
3239 p->arg.fh = NFS_FH(inode);
3241 p->arg.seqid = seqid;
3242 p->res.seqid = seqid;
3243 p->arg.stateid = &lsp->ls_stateid;
3245 atomic_inc(&lsp->ls_count);
3246 /* Ensure we don't close file until we're done freeing locks! */
3247 p->ctx = get_nfs_open_context(ctx);
3248 memcpy(&p->fl, fl, sizeof(p->fl));
3249 p->server = NFS_SERVER(inode);
3253 static void nfs4_locku_release_calldata(void *data)
3255 struct nfs4_unlockdata *calldata = data;
3256 nfs_free_seqid(calldata->arg.seqid);
3257 nfs4_put_lock_state(calldata->lsp);
3258 put_nfs_open_context(calldata->ctx);
3262 static void nfs4_locku_done(struct rpc_task *task, void *data)
3264 struct nfs4_unlockdata *calldata = data;
3266 if (RPC_ASSASSINATED(task))
3268 switch (task->tk_status) {
3270 memcpy(calldata->lsp->ls_stateid.data,
3271 calldata->res.stateid.data,
3272 sizeof(calldata->lsp->ls_stateid.data));
3273 renew_lease(calldata->server, calldata->timestamp);
3275 case -NFS4ERR_BAD_STATEID:
3276 case -NFS4ERR_OLD_STATEID:
3277 case -NFS4ERR_STALE_STATEID:
3278 case -NFS4ERR_EXPIRED:
3281 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3282 rpc_restart_call(task);
3286 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3288 struct nfs4_unlockdata *calldata = data;
3290 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3292 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3293 /* Note: exit _without_ running nfs4_locku_done */
3294 task->tk_action = NULL;
3297 calldata->timestamp = jiffies;
3298 rpc_call_start(task);
3301 static const struct rpc_call_ops nfs4_locku_ops = {
3302 .rpc_call_prepare = nfs4_locku_prepare,
3303 .rpc_call_done = nfs4_locku_done,
3304 .rpc_release = nfs4_locku_release_calldata,
3307 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3308 struct nfs_open_context *ctx,
3309 struct nfs4_lock_state *lsp,
3310 struct nfs_seqid *seqid)
3312 struct nfs4_unlockdata *data;
3313 struct rpc_message msg = {
3314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3315 .rpc_cred = ctx->cred,
3317 struct rpc_task_setup task_setup_data = {
3318 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3319 .rpc_message = &msg,
3320 .callback_ops = &nfs4_locku_ops,
3321 .workqueue = nfsiod_workqueue,
3322 .flags = RPC_TASK_ASYNC,
3325 /* Ensure this is an unlock - when canceling a lock, the
3326 * canceled lock is passed in, and it won't be an unlock.
3328 fl->fl_type = F_UNLCK;
3330 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3332 nfs_free_seqid(seqid);
3333 return ERR_PTR(-ENOMEM);
3336 msg.rpc_argp = &data->arg,
3337 msg.rpc_resp = &data->res,
3338 task_setup_data.callback_data = data;
3339 return rpc_run_task(&task_setup_data);
3342 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3344 struct nfs_inode *nfsi = NFS_I(state->inode);
3345 struct nfs_seqid *seqid;
3346 struct nfs4_lock_state *lsp;
3347 struct rpc_task *task;
3349 unsigned char fl_flags = request->fl_flags;
3351 status = nfs4_set_lock_state(state, request);
3352 /* Unlock _before_ we do the RPC call */
3353 request->fl_flags |= FL_EXISTS;
3354 down_read(&nfsi->rwsem);
3355 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3356 up_read(&nfsi->rwsem);
3359 up_read(&nfsi->rwsem);
3362 /* Is this a delegated lock? */
3363 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3365 lsp = request->fl_u.nfs4_fl.owner;
3366 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3370 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3371 status = PTR_ERR(task);
3374 status = nfs4_wait_for_completion_rpc_task(task);
3377 request->fl_flags = fl_flags;
3381 struct nfs4_lockdata {
3382 struct nfs_lock_args arg;
3383 struct nfs_lock_res res;
3384 struct nfs4_lock_state *lsp;
3385 struct nfs_open_context *ctx;
3386 struct file_lock fl;
3387 unsigned long timestamp;
3392 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3393 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3395 struct nfs4_lockdata *p;
3396 struct inode *inode = lsp->ls_state->inode;
3397 struct nfs_server *server = NFS_SERVER(inode);
3399 p = kzalloc(sizeof(*p), GFP_KERNEL);
3403 p->arg.fh = NFS_FH(inode);
3405 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3406 if (p->arg.open_seqid == NULL)
3408 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3409 if (p->arg.lock_seqid == NULL)
3410 goto out_free_seqid;
3411 p->arg.lock_stateid = &lsp->ls_stateid;
3412 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3413 p->arg.lock_owner.id = lsp->ls_id.id;
3414 p->res.lock_seqid = p->arg.lock_seqid;
3416 atomic_inc(&lsp->ls_count);
3417 p->ctx = get_nfs_open_context(ctx);
3418 memcpy(&p->fl, fl, sizeof(p->fl));
3421 nfs_free_seqid(p->arg.open_seqid);
3427 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3429 struct nfs4_lockdata *data = calldata;
3430 struct nfs4_state *state = data->lsp->ls_state;
3432 dprintk("%s: begin!\n", __func__);
3433 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3435 /* Do we need to do an open_to_lock_owner? */
3436 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3437 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3439 data->arg.open_stateid = &state->stateid;
3440 data->arg.new_lock_owner = 1;
3441 data->res.open_seqid = data->arg.open_seqid;
3443 data->arg.new_lock_owner = 0;
3444 data->timestamp = jiffies;
3445 rpc_call_start(task);
3446 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3449 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3451 struct nfs4_lockdata *data = calldata;
3453 dprintk("%s: begin!\n", __func__);
3455 data->rpc_status = task->tk_status;
3456 if (RPC_ASSASSINATED(task))
3458 if (data->arg.new_lock_owner != 0) {
3459 if (data->rpc_status == 0)
3460 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3464 if (data->rpc_status == 0) {
3465 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3466 sizeof(data->lsp->ls_stateid.data));
3467 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3468 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3471 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3474 static void nfs4_lock_release(void *calldata)
3476 struct nfs4_lockdata *data = calldata;
3478 dprintk("%s: begin!\n", __func__);
3479 nfs_free_seqid(data->arg.open_seqid);
3480 if (data->cancelled != 0) {
3481 struct rpc_task *task;
3482 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3483 data->arg.lock_seqid);
3486 dprintk("%s: cancelling lock!\n", __func__);
3488 nfs_free_seqid(data->arg.lock_seqid);
3489 nfs4_put_lock_state(data->lsp);
3490 put_nfs_open_context(data->ctx);
3492 dprintk("%s: done!\n", __func__);
3495 static const struct rpc_call_ops nfs4_lock_ops = {
3496 .rpc_call_prepare = nfs4_lock_prepare,
3497 .rpc_call_done = nfs4_lock_done,
3498 .rpc_release = nfs4_lock_release,
3501 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3503 struct nfs4_lockdata *data;
3504 struct rpc_task *task;
3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3507 .rpc_cred = state->owner->so_cred,
3509 struct rpc_task_setup task_setup_data = {
3510 .rpc_client = NFS_CLIENT(state->inode),
3511 .rpc_message = &msg,
3512 .callback_ops = &nfs4_lock_ops,
3513 .workqueue = nfsiod_workqueue,
3514 .flags = RPC_TASK_ASYNC,
3518 dprintk("%s: begin!\n", __func__);
3519 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3520 fl->fl_u.nfs4_fl.owner);
3524 data->arg.block = 1;
3526 data->arg.reclaim = 1;
3527 msg.rpc_argp = &data->arg,
3528 msg.rpc_resp = &data->res,
3529 task_setup_data.callback_data = data;
3530 task = rpc_run_task(&task_setup_data);
3532 return PTR_ERR(task);
3533 ret = nfs4_wait_for_completion_rpc_task(task);
3535 ret = data->rpc_status;
3536 if (ret == -NFS4ERR_DENIED)
3539 data->cancelled = 1;
3541 dprintk("%s: done, ret = %d!\n", __func__, ret);
3545 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3547 struct nfs_server *server = NFS_SERVER(state->inode);
3548 struct nfs4_exception exception = { };
3552 /* Cache the lock if possible... */
3553 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3555 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3556 if (err != -NFS4ERR_DELAY)
3558 nfs4_handle_exception(server, err, &exception);
3559 } while (exception.retry);
3563 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3565 struct nfs_server *server = NFS_SERVER(state->inode);
3566 struct nfs4_exception exception = { };
3569 err = nfs4_set_lock_state(state, request);
3573 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3575 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3576 if (err != -NFS4ERR_DELAY)
3578 nfs4_handle_exception(server, err, &exception);
3579 } while (exception.retry);
3583 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3585 struct nfs_inode *nfsi = NFS_I(state->inode);
3586 unsigned char fl_flags = request->fl_flags;
3589 /* Is this a delegated open? */
3590 status = nfs4_set_lock_state(state, request);
3593 request->fl_flags |= FL_ACCESS;
3594 status = do_vfs_lock(request->fl_file, request);
3597 down_read(&nfsi->rwsem);
3598 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3599 /* Yes: cache locks! */
3600 /* ...but avoid races with delegation recall... */
3601 request->fl_flags = fl_flags & ~FL_SLEEP;
3602 status = do_vfs_lock(request->fl_file, request);
3605 status = _nfs4_do_setlk(state, cmd, request, 0);
3608 /* Note: we always want to sleep here! */
3609 request->fl_flags = fl_flags | FL_SLEEP;
3610 if (do_vfs_lock(request->fl_file, request) < 0)
3611 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3613 up_read(&nfsi->rwsem);
3615 request->fl_flags = fl_flags;
3619 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3621 struct nfs4_exception exception = { };
3625 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3626 _nfs4_proc_setlk(state, cmd, request),
3628 } while (exception.retry);
3633 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3635 struct nfs_open_context *ctx;
3636 struct nfs4_state *state;
3637 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3640 /* verify open state */
3641 ctx = nfs_file_open_context(filp);
3644 if (request->fl_start < 0 || request->fl_end < 0)
3648 return nfs4_proc_getlk(state, F_GETLK, request);
3650 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3653 if (request->fl_type == F_UNLCK)
3654 return nfs4_proc_unlck(state, cmd, request);
3657 status = nfs4_proc_setlk(state, cmd, request);
3658 if ((status != -EAGAIN) || IS_SETLK(cmd))
3660 timeout = nfs4_set_lock_task_retry(timeout);
3661 status = -ERESTARTSYS;
3664 } while(status < 0);
3668 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3670 struct nfs_server *server = NFS_SERVER(state->inode);
3671 struct nfs4_exception exception = { };
3674 err = nfs4_set_lock_state(state, fl);
3678 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3679 if (err != -NFS4ERR_DELAY)
3681 err = nfs4_handle_exception(server, err, &exception);
3682 } while (exception.retry);
3687 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3689 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3690 size_t buflen, int flags)
3692 struct inode *inode = dentry->d_inode;
3694 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3697 return nfs4_proc_set_acl(inode, buf, buflen);
3700 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3701 * and that's what we'll do for e.g. user attributes that haven't been set.
3702 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3703 * attributes in kernel-managed attribute namespaces. */
3704 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3707 struct inode *inode = dentry->d_inode;
3709 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3712 return nfs4_proc_get_acl(inode, buf, buflen);
3715 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3717 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3719 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3721 if (buf && buflen < len)
3724 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3728 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3730 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3731 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3732 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3735 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3736 NFS_ATTR_FATTR_NLINK;
3737 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3741 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3742 struct nfs4_fs_locations *fs_locations, struct page *page)
3744 struct nfs_server *server = NFS_SERVER(dir);
3746 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3747 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3749 struct nfs4_fs_locations_arg args = {
3750 .dir_fh = NFS_FH(dir),
3755 struct nfs4_fs_locations_res res = {
3756 .fs_locations = fs_locations,
3758 struct rpc_message msg = {
3759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3765 dprintk("%s: start\n", __func__);
3766 nfs_fattr_init(&fs_locations->fattr);
3767 fs_locations->server = server;
3768 fs_locations->nlocations = 0;
3769 status = nfs4_call_sync(server, &msg, &args, &res, 0);
3770 nfs_fixup_referral_attributes(&fs_locations->fattr);
3771 dprintk("%s: returned status = %d\n", __func__, status);
3775 #ifdef CONFIG_NFS_V4_1
3776 /* Destroy the slot table */
3777 static void nfs4_destroy_slot_table(struct nfs4_session *session)
3779 if (session->fc_slot_table.slots == NULL)
3781 kfree(session->fc_slot_table.slots);
3782 session->fc_slot_table.slots = NULL;
3786 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
3788 struct nfs4_session *session;
3789 struct nfs4_slot_table *tbl;
3791 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
3794 tbl = &session->fc_slot_table;
3795 spin_lock_init(&tbl->slot_tbl_lock);
3796 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
3801 void nfs4_destroy_session(struct nfs4_session *session)
3803 nfs4_destroy_slot_table(session);
3807 #endif /* CONFIG_NFS_V4_1 */
3809 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3810 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
3811 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
3812 .recover_open = nfs4_open_reclaim,
3813 .recover_lock = nfs4_lock_reclaim,
3816 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3817 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
3818 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
3819 .recover_open = nfs4_open_expired,
3820 .recover_lock = nfs4_lock_expired,
3823 static const struct inode_operations nfs4_file_inode_operations = {
3824 .permission = nfs_permission,
3825 .getattr = nfs_getattr,
3826 .setattr = nfs_setattr,
3827 .getxattr = nfs4_getxattr,
3828 .setxattr = nfs4_setxattr,
3829 .listxattr = nfs4_listxattr,
3832 const struct nfs_rpc_ops nfs_v4_clientops = {
3833 .version = 4, /* protocol version */
3834 .dentry_ops = &nfs4_dentry_operations,
3835 .dir_inode_ops = &nfs4_dir_inode_operations,
3836 .file_inode_ops = &nfs4_file_inode_operations,
3837 .getroot = nfs4_proc_get_root,
3838 .getattr = nfs4_proc_getattr,
3839 .setattr = nfs4_proc_setattr,
3840 .lookupfh = nfs4_proc_lookupfh,
3841 .lookup = nfs4_proc_lookup,
3842 .access = nfs4_proc_access,
3843 .readlink = nfs4_proc_readlink,
3844 .create = nfs4_proc_create,
3845 .remove = nfs4_proc_remove,
3846 .unlink_setup = nfs4_proc_unlink_setup,
3847 .unlink_done = nfs4_proc_unlink_done,
3848 .rename = nfs4_proc_rename,
3849 .link = nfs4_proc_link,
3850 .symlink = nfs4_proc_symlink,
3851 .mkdir = nfs4_proc_mkdir,
3852 .rmdir = nfs4_proc_remove,
3853 .readdir = nfs4_proc_readdir,
3854 .mknod = nfs4_proc_mknod,
3855 .statfs = nfs4_proc_statfs,
3856 .fsinfo = nfs4_proc_fsinfo,
3857 .pathconf = nfs4_proc_pathconf,
3858 .set_capabilities = nfs4_server_capabilities,
3859 .decode_dirent = nfs4_decode_dirent,
3860 .read_setup = nfs4_proc_read_setup,
3861 .read_done = nfs4_read_done,
3862 .write_setup = nfs4_proc_write_setup,
3863 .write_done = nfs4_write_done,
3864 .commit_setup = nfs4_proc_commit_setup,
3865 .commit_done = nfs4_commit_done,
3866 .lock = nfs4_proc_lock,
3867 .clear_acl_cache = nfs4_zap_acl_attr,
3868 .close_context = nfs4_close_context,