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 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_bit_killable(void *word)
198 if (fatal_signal_pending(current))
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs4_wait_bit_killable, TASK_KILLABLE);
215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
241 exception->retry = 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
257 exception->retry = 1;
259 case -NFS4ERR_FILE_OPEN:
262 ret = nfs4_delay(server->client, &exception->timeout);
265 case -NFS4ERR_OLD_STATEID:
266 exception->retry = 1;
268 /* We failed to handle the error */
269 return nfs4_map_errors(ret);
273 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
275 struct nfs_client *clp = server->nfs_client;
276 spin_lock(&clp->cl_lock);
277 if (time_before(clp->cl_last_renewal,timestamp))
278 clp->cl_last_renewal = timestamp;
279 spin_unlock(&clp->cl_lock);
282 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
284 struct nfs_inode *nfsi = NFS_I(dir);
286 spin_lock(&dir->i_lock);
287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
288 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
289 nfs_force_lookup_revalidate(dir);
290 nfsi->change_attr = cinfo->after;
291 spin_unlock(&dir->i_lock);
294 struct nfs4_opendata {
296 struct nfs_openargs o_arg;
297 struct nfs_openres o_res;
298 struct nfs_open_confirmargs c_arg;
299 struct nfs_open_confirmres c_res;
300 struct nfs_fattr f_attr;
301 struct nfs_fattr dir_attr;
304 struct nfs4_state_owner *owner;
305 struct nfs4_state *state;
307 unsigned long timestamp;
308 unsigned int rpc_done : 1;
314 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
316 p->o_res.f_attr = &p->f_attr;
317 p->o_res.dir_attr = &p->dir_attr;
318 p->o_res.seqid = p->o_arg.seqid;
319 p->c_res.seqid = p->c_arg.seqid;
320 p->o_res.server = p->o_arg.server;
321 nfs_fattr_init(&p->f_attr);
322 nfs_fattr_init(&p->dir_attr);
325 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
326 struct nfs4_state_owner *sp, int flags,
327 const struct iattr *attrs)
329 struct dentry *parent = dget_parent(path->dentry);
330 struct inode *dir = parent->d_inode;
331 struct nfs_server *server = NFS_SERVER(dir);
332 struct nfs4_opendata *p;
334 p = kzalloc(sizeof(*p), GFP_KERNEL);
337 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
338 if (p->o_arg.seqid == NULL)
340 p->path.mnt = mntget(path->mnt);
341 p->path.dentry = dget(path->dentry);
344 atomic_inc(&sp->so_count);
345 p->o_arg.fh = NFS_FH(dir);
346 p->o_arg.open_flags = flags,
347 p->o_arg.clientid = server->nfs_client->cl_clientid;
348 p->o_arg.id = sp->so_owner_id.id;
349 p->o_arg.name = &p->path.dentry->d_name;
350 p->o_arg.server = server;
351 p->o_arg.bitmask = server->attr_bitmask;
352 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
353 if (flags & O_EXCL) {
354 u32 *s = (u32 *) p->o_arg.u.verifier.data;
357 } else if (flags & O_CREAT) {
358 p->o_arg.u.attrs = &p->attrs;
359 memcpy(&p->attrs, attrs, sizeof(p->attrs));
361 p->c_arg.fh = &p->o_res.fh;
362 p->c_arg.stateid = &p->o_res.stateid;
363 p->c_arg.seqid = p->o_arg.seqid;
364 nfs4_init_opendata_res(p);
374 static void nfs4_opendata_free(struct kref *kref)
376 struct nfs4_opendata *p = container_of(kref,
377 struct nfs4_opendata, kref);
379 nfs_free_seqid(p->o_arg.seqid);
380 if (p->state != NULL)
381 nfs4_put_open_state(p->state);
382 nfs4_put_state_owner(p->owner);
388 static void nfs4_opendata_put(struct nfs4_opendata *p)
391 kref_put(&p->kref, nfs4_opendata_free);
394 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
398 ret = rpc_wait_for_completion_task(task);
402 static int can_open_cached(struct nfs4_state *state, int mode)
405 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
407 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
410 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
412 case FMODE_READ|FMODE_WRITE:
413 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
418 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
420 if ((delegation->type & open_flags) != open_flags)
422 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
424 nfs_mark_delegation_referenced(delegation);
428 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
430 switch (open_flags) {
437 case FMODE_READ|FMODE_WRITE:
440 nfs4_state_set_mode_locked(state, state->state | open_flags);
443 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
445 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
446 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
447 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
448 switch (open_flags) {
450 set_bit(NFS_O_RDONLY_STATE, &state->flags);
453 set_bit(NFS_O_WRONLY_STATE, &state->flags);
455 case FMODE_READ|FMODE_WRITE:
456 set_bit(NFS_O_RDWR_STATE, &state->flags);
460 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
462 write_seqlock(&state->seqlock);
463 nfs_set_open_stateid_locked(state, stateid, open_flags);
464 write_sequnlock(&state->seqlock);
467 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, int open_flags)
470 * Protect the call to nfs4_state_set_mode_locked and
471 * serialise the stateid update
473 write_seqlock(&state->seqlock);
474 if (deleg_stateid != NULL) {
475 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
476 set_bit(NFS_DELEGATED_STATE, &state->flags);
478 if (open_stateid != NULL)
479 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
480 write_sequnlock(&state->seqlock);
481 spin_lock(&state->owner->so_lock);
482 update_open_stateflags(state, open_flags);
483 spin_unlock(&state->owner->so_lock);
486 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, int open_flags)
488 struct nfs_inode *nfsi = NFS_I(state->inode);
489 struct nfs_delegation *deleg_cur;
492 open_flags &= (FMODE_READ|FMODE_WRITE);
495 deleg_cur = rcu_dereference(nfsi->delegation);
496 if (deleg_cur == NULL)
499 spin_lock(&deleg_cur->lock);
500 if (nfsi->delegation != deleg_cur ||
501 (deleg_cur->type & open_flags) != open_flags)
502 goto no_delegation_unlock;
504 if (delegation == NULL)
505 delegation = &deleg_cur->stateid;
506 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
507 goto no_delegation_unlock;
509 nfs_mark_delegation_referenced(deleg_cur);
510 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
512 no_delegation_unlock:
513 spin_unlock(&deleg_cur->lock);
517 if (!ret && open_stateid != NULL) {
518 __update_open_stateid(state, open_stateid, NULL, open_flags);
526 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
528 struct nfs_delegation *delegation;
531 delegation = rcu_dereference(NFS_I(inode)->delegation);
532 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
537 nfs_inode_return_delegation(inode);
540 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
542 struct nfs4_state *state = opendata->state;
543 struct nfs_inode *nfsi = NFS_I(state->inode);
544 struct nfs_delegation *delegation;
545 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
546 nfs4_stateid stateid;
550 if (can_open_cached(state, open_mode)) {
551 spin_lock(&state->owner->so_lock);
552 if (can_open_cached(state, open_mode)) {
553 update_open_stateflags(state, open_mode);
554 spin_unlock(&state->owner->so_lock);
555 goto out_return_state;
557 spin_unlock(&state->owner->so_lock);
560 delegation = rcu_dereference(nfsi->delegation);
561 if (delegation == NULL ||
562 !can_open_delegated(delegation, open_mode)) {
566 /* Save the delegation */
567 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
569 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
574 /* Try to update the stateid using the delegation */
575 if (update_open_stateid(state, NULL, &stateid, open_mode))
576 goto out_return_state;
581 atomic_inc(&state->count);
585 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
588 struct nfs4_state *state = NULL;
589 struct nfs_delegation *delegation;
592 if (!data->rpc_done) {
593 state = nfs4_try_open_cached(data);
598 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
600 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
601 ret = PTR_ERR(inode);
605 state = nfs4_get_open_state(inode, data->owner);
608 if (data->o_res.delegation_type != 0) {
609 int delegation_flags = 0;
612 delegation = rcu_dereference(NFS_I(inode)->delegation);
614 delegation_flags = delegation->flags;
616 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
617 nfs_inode_set_delegation(state->inode,
618 data->owner->so_cred,
621 nfs_inode_reclaim_delegation(state->inode,
622 data->owner->so_cred,
626 update_open_stateid(state, &data->o_res.stateid, NULL,
627 data->o_arg.open_flags);
637 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
639 struct nfs_inode *nfsi = NFS_I(state->inode);
640 struct nfs_open_context *ctx;
642 spin_lock(&state->inode->i_lock);
643 list_for_each_entry(ctx, &nfsi->open_files, list) {
644 if (ctx->state != state)
646 get_nfs_open_context(ctx);
647 spin_unlock(&state->inode->i_lock);
650 spin_unlock(&state->inode->i_lock);
651 return ERR_PTR(-ENOENT);
654 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
656 struct nfs4_opendata *opendata;
658 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
659 if (opendata == NULL)
660 return ERR_PTR(-ENOMEM);
661 opendata->state = state;
662 atomic_inc(&state->count);
666 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
668 struct nfs4_state *newstate;
671 opendata->o_arg.open_flags = openflags;
672 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
673 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
674 nfs4_init_opendata_res(opendata);
675 ret = _nfs4_proc_open(opendata);
678 newstate = nfs4_opendata_to_nfs4_state(opendata);
679 if (IS_ERR(newstate))
680 return PTR_ERR(newstate);
681 nfs4_close_state(&opendata->path, newstate, openflags);
686 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
688 struct nfs4_state *newstate;
691 /* memory barrier prior to reading state->n_* */
692 clear_bit(NFS_DELEGATED_STATE, &state->flags);
694 if (state->n_rdwr != 0) {
695 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
698 if (newstate != state)
701 if (state->n_wronly != 0) {
702 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
705 if (newstate != state)
708 if (state->n_rdonly != 0) {
709 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
712 if (newstate != state)
716 * We may have performed cached opens for all three recoveries.
717 * Check if we need to update the current stateid.
719 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
720 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
721 write_seqlock(&state->seqlock);
722 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
723 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
724 write_sequnlock(&state->seqlock);
731 * reclaim state on the server after a reboot.
733 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
735 struct nfs_delegation *delegation;
736 struct nfs4_opendata *opendata;
737 int delegation_type = 0;
740 opendata = nfs4_open_recoverdata_alloc(ctx, state);
741 if (IS_ERR(opendata))
742 return PTR_ERR(opendata);
743 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
744 opendata->o_arg.fh = NFS_FH(state->inode);
746 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
747 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
748 delegation_type = delegation->type;
750 opendata->o_arg.u.delegation_type = delegation_type;
751 status = nfs4_open_recover(opendata, state);
752 nfs4_opendata_put(opendata);
756 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
758 struct nfs_server *server = NFS_SERVER(state->inode);
759 struct nfs4_exception exception = { };
762 err = _nfs4_do_open_reclaim(ctx, state);
763 if (err != -NFS4ERR_DELAY)
765 nfs4_handle_exception(server, err, &exception);
766 } while (exception.retry);
770 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
772 struct nfs_open_context *ctx;
775 ctx = nfs4_state_find_open_context(state);
778 ret = nfs4_do_open_reclaim(ctx, state);
779 put_nfs_open_context(ctx);
783 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
785 struct nfs4_opendata *opendata;
788 opendata = nfs4_open_recoverdata_alloc(ctx, state);
789 if (IS_ERR(opendata))
790 return PTR_ERR(opendata);
791 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
792 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
793 sizeof(opendata->o_arg.u.delegation.data));
794 ret = nfs4_open_recover(opendata, state);
795 nfs4_opendata_put(opendata);
799 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
801 struct nfs4_exception exception = { };
802 struct nfs_server *server = NFS_SERVER(state->inode);
805 err = _nfs4_open_delegation_recall(ctx, state, stateid);
809 case -NFS4ERR_STALE_CLIENTID:
810 case -NFS4ERR_STALE_STATEID:
811 case -NFS4ERR_EXPIRED:
812 /* Don't recall a delegation if it was lost */
813 nfs4_schedule_state_recovery(server->nfs_client);
816 err = nfs4_handle_exception(server, err, &exception);
817 } while (exception.retry);
821 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
823 struct nfs4_opendata *data = calldata;
825 data->rpc_status = task->tk_status;
826 if (RPC_ASSASSINATED(task))
828 if (data->rpc_status == 0) {
829 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
830 sizeof(data->o_res.stateid.data));
831 nfs_confirm_seqid(&data->owner->so_seqid, 0);
832 renew_lease(data->o_res.server, data->timestamp);
837 static void nfs4_open_confirm_release(void *calldata)
839 struct nfs4_opendata *data = calldata;
840 struct nfs4_state *state = NULL;
842 /* If this request hasn't been cancelled, do nothing */
843 if (data->cancelled == 0)
845 /* In case of error, no cleanup! */
848 state = nfs4_opendata_to_nfs4_state(data);
850 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
852 nfs4_opendata_put(data);
855 static const struct rpc_call_ops nfs4_open_confirm_ops = {
856 .rpc_call_done = nfs4_open_confirm_done,
857 .rpc_release = nfs4_open_confirm_release,
861 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
863 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
865 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
866 struct rpc_task *task;
867 struct rpc_message msg = {
868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
869 .rpc_argp = &data->c_arg,
870 .rpc_resp = &data->c_res,
871 .rpc_cred = data->owner->so_cred,
873 struct rpc_task_setup task_setup_data = {
874 .rpc_client = server->client,
876 .callback_ops = &nfs4_open_confirm_ops,
877 .callback_data = data,
878 .workqueue = nfsiod_workqueue,
879 .flags = RPC_TASK_ASYNC,
883 kref_get(&data->kref);
885 data->rpc_status = 0;
886 data->timestamp = jiffies;
887 task = rpc_run_task(&task_setup_data);
889 return PTR_ERR(task);
890 status = nfs4_wait_for_completion_rpc_task(task);
895 status = data->rpc_status;
900 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
902 struct nfs4_opendata *data = calldata;
903 struct nfs4_state_owner *sp = data->owner;
905 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
908 * Check if we still need to send an OPEN call, or if we can use
909 * a delegation instead.
911 if (data->state != NULL) {
912 struct nfs_delegation *delegation;
914 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
917 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
918 if (delegation != NULL &&
919 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
925 /* Update sequence id. */
926 data->o_arg.id = sp->so_owner_id.id;
927 data->o_arg.clientid = sp->so_client->cl_clientid;
928 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
929 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
930 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
932 data->timestamp = jiffies;
933 rpc_call_start(task);
936 task->tk_action = NULL;
940 static void nfs4_open_done(struct rpc_task *task, void *calldata)
942 struct nfs4_opendata *data = calldata;
944 data->rpc_status = task->tk_status;
945 if (RPC_ASSASSINATED(task))
947 if (task->tk_status == 0) {
948 switch (data->o_res.f_attr->mode & S_IFMT) {
952 data->rpc_status = -ELOOP;
955 data->rpc_status = -EISDIR;
958 data->rpc_status = -ENOTDIR;
960 renew_lease(data->o_res.server, data->timestamp);
961 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
962 nfs_confirm_seqid(&data->owner->so_seqid, 0);
967 static void nfs4_open_release(void *calldata)
969 struct nfs4_opendata *data = calldata;
970 struct nfs4_state *state = NULL;
972 /* If this request hasn't been cancelled, do nothing */
973 if (data->cancelled == 0)
975 /* In case of error, no cleanup! */
976 if (data->rpc_status != 0 || !data->rpc_done)
978 /* In case we need an open_confirm, no cleanup! */
979 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
981 state = nfs4_opendata_to_nfs4_state(data);
983 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
985 nfs4_opendata_put(data);
988 static const struct rpc_call_ops nfs4_open_ops = {
989 .rpc_call_prepare = nfs4_open_prepare,
990 .rpc_call_done = nfs4_open_done,
991 .rpc_release = nfs4_open_release,
995 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
997 static int _nfs4_proc_open(struct nfs4_opendata *data)
999 struct inode *dir = data->dir->d_inode;
1000 struct nfs_server *server = NFS_SERVER(dir);
1001 struct nfs_openargs *o_arg = &data->o_arg;
1002 struct nfs_openres *o_res = &data->o_res;
1003 struct rpc_task *task;
1004 struct rpc_message msg = {
1005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1008 .rpc_cred = data->owner->so_cred,
1010 struct rpc_task_setup task_setup_data = {
1011 .rpc_client = server->client,
1012 .rpc_message = &msg,
1013 .callback_ops = &nfs4_open_ops,
1014 .callback_data = data,
1015 .workqueue = nfsiod_workqueue,
1016 .flags = RPC_TASK_ASYNC,
1020 kref_get(&data->kref);
1022 data->rpc_status = 0;
1023 data->cancelled = 0;
1024 task = rpc_run_task(&task_setup_data);
1026 return PTR_ERR(task);
1027 status = nfs4_wait_for_completion_rpc_task(task);
1029 data->cancelled = 1;
1032 status = data->rpc_status;
1034 if (status != 0 || !data->rpc_done)
1037 if (o_res->fh.size == 0)
1038 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1040 if (o_arg->open_flags & O_CREAT) {
1041 update_changeattr(dir, &o_res->cinfo);
1042 nfs_post_op_update_inode(dir, o_res->dir_attr);
1044 nfs_refresh_inode(dir, o_res->dir_attr);
1045 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1046 status = _nfs4_proc_open_confirm(data);
1050 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1051 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1055 static int nfs4_recover_expired_lease(struct nfs_server *server)
1057 struct nfs_client *clp = server->nfs_client;
1061 ret = nfs4_wait_clnt_recover(clp);
1064 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1065 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1067 nfs4_schedule_state_recovery(clp);
1074 * reclaim state on the server after a network partition.
1075 * Assumes caller holds the appropriate lock
1077 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1079 struct nfs4_opendata *opendata;
1082 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1083 if (IS_ERR(opendata))
1084 return PTR_ERR(opendata);
1085 ret = nfs4_open_recover(opendata, state);
1087 d_drop(ctx->path.dentry);
1088 nfs4_opendata_put(opendata);
1092 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1094 struct nfs_server *server = NFS_SERVER(state->inode);
1095 struct nfs4_exception exception = { };
1099 err = _nfs4_open_expired(ctx, state);
1100 if (err == -NFS4ERR_DELAY)
1101 nfs4_handle_exception(server, err, &exception);
1102 } while (exception.retry);
1106 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1108 struct nfs_open_context *ctx;
1111 ctx = nfs4_state_find_open_context(state);
1113 return PTR_ERR(ctx);
1114 ret = nfs4_do_open_expired(ctx, state);
1115 put_nfs_open_context(ctx);
1120 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1121 * fields corresponding to attributes that were used to store the verifier.
1122 * Make sure we clobber those fields in the later setattr call
1124 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1126 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1127 !(sattr->ia_valid & ATTR_ATIME_SET))
1128 sattr->ia_valid |= ATTR_ATIME;
1130 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1131 !(sattr->ia_valid & ATTR_MTIME_SET))
1132 sattr->ia_valid |= ATTR_MTIME;
1136 * Returns a referenced nfs4_state
1138 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1140 struct nfs4_state_owner *sp;
1141 struct nfs4_state *state = NULL;
1142 struct nfs_server *server = NFS_SERVER(dir);
1143 struct nfs4_opendata *opendata;
1146 /* Protect against reboot recovery conflicts */
1148 if (!(sp = nfs4_get_state_owner(server, cred))) {
1149 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1152 status = nfs4_recover_expired_lease(server);
1154 goto err_put_state_owner;
1155 if (path->dentry->d_inode != NULL)
1156 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1158 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1159 if (opendata == NULL)
1160 goto err_put_state_owner;
1162 if (path->dentry->d_inode != NULL)
1163 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1165 status = _nfs4_proc_open(opendata);
1167 goto err_opendata_put;
1169 if (opendata->o_arg.open_flags & O_EXCL)
1170 nfs4_exclusive_attrset(opendata, sattr);
1172 state = nfs4_opendata_to_nfs4_state(opendata);
1173 status = PTR_ERR(state);
1175 goto err_opendata_put;
1176 nfs4_opendata_put(opendata);
1177 nfs4_put_state_owner(sp);
1181 nfs4_opendata_put(opendata);
1182 err_put_state_owner:
1183 nfs4_put_state_owner(sp);
1190 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1192 struct nfs4_exception exception = { };
1193 struct nfs4_state *res;
1197 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1200 /* NOTE: BAD_SEQID means the server and client disagree about the
1201 * book-keeping w.r.t. state-changing operations
1202 * (OPEN/CLOSE/LOCK/LOCKU...)
1203 * It is actually a sign of a bug on the client or on the server.
1205 * If we receive a BAD_SEQID error in the particular case of
1206 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1207 * have unhashed the old state_owner for us, and that we can
1208 * therefore safely retry using a new one. We should still warn
1209 * the user though...
1211 if (status == -NFS4ERR_BAD_SEQID) {
1212 printk(KERN_WARNING "NFS: v4 server %s "
1213 " returned a bad sequence-id error!\n",
1214 NFS_SERVER(dir)->nfs_client->cl_hostname);
1215 exception.retry = 1;
1219 * BAD_STATEID on OPEN means that the server cancelled our
1220 * state before it received the OPEN_CONFIRM.
1221 * Recover by retrying the request as per the discussion
1222 * on Page 181 of RFC3530.
1224 if (status == -NFS4ERR_BAD_STATEID) {
1225 exception.retry = 1;
1228 if (status == -EAGAIN) {
1229 /* We must have found a delegation */
1230 exception.retry = 1;
1233 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1234 status, &exception));
1235 } while (exception.retry);
1239 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1240 struct nfs_fattr *fattr, struct iattr *sattr,
1241 struct nfs4_state *state)
1243 struct nfs_server *server = NFS_SERVER(inode);
1244 struct nfs_setattrargs arg = {
1245 .fh = NFS_FH(inode),
1248 .bitmask = server->attr_bitmask,
1250 struct nfs_setattrres res = {
1254 struct rpc_message msg = {
1255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1260 unsigned long timestamp = jiffies;
1263 nfs_fattr_init(fattr);
1265 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1266 /* Use that stateid */
1267 } else if (state != NULL) {
1268 nfs4_copy_stateid(&arg.stateid, state, current->files);
1270 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1272 status = rpc_call_sync(server->client, &msg, 0);
1273 if (status == 0 && state != NULL)
1274 renew_lease(server, timestamp);
1278 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1279 struct nfs_fattr *fattr, struct iattr *sattr,
1280 struct nfs4_state *state)
1282 struct nfs_server *server = NFS_SERVER(inode);
1283 struct nfs4_exception exception = { };
1286 err = nfs4_handle_exception(server,
1287 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1289 } while (exception.retry);
1293 struct nfs4_closedata {
1295 struct inode *inode;
1296 struct nfs4_state *state;
1297 struct nfs_closeargs arg;
1298 struct nfs_closeres res;
1299 struct nfs_fattr fattr;
1300 unsigned long timestamp;
1303 static void nfs4_free_closedata(void *data)
1305 struct nfs4_closedata *calldata = data;
1306 struct nfs4_state_owner *sp = calldata->state->owner;
1308 nfs4_put_open_state(calldata->state);
1309 nfs_free_seqid(calldata->arg.seqid);
1310 nfs4_put_state_owner(sp);
1311 path_put(&calldata->path);
1315 static void nfs4_close_done(struct rpc_task *task, void *data)
1317 struct nfs4_closedata *calldata = data;
1318 struct nfs4_state *state = calldata->state;
1319 struct nfs_server *server = NFS_SERVER(calldata->inode);
1321 if (RPC_ASSASSINATED(task))
1323 /* hmm. we are done with the inode, and in the process of freeing
1324 * the state_owner. we keep this around to process errors
1326 switch (task->tk_status) {
1328 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1329 renew_lease(server, calldata->timestamp);
1331 case -NFS4ERR_STALE_STATEID:
1332 case -NFS4ERR_OLD_STATEID:
1333 case -NFS4ERR_BAD_STATEID:
1334 case -NFS4ERR_EXPIRED:
1335 if (calldata->arg.open_flags == 0)
1338 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1339 rpc_restart_call(task);
1343 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1346 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1348 struct nfs4_closedata *calldata = data;
1349 struct nfs4_state *state = calldata->state;
1350 int clear_rd, clear_wr, clear_rdwr;
1352 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1355 clear_rd = clear_wr = clear_rdwr = 0;
1356 spin_lock(&state->owner->so_lock);
1357 /* Calculate the change in open mode */
1358 if (state->n_rdwr == 0) {
1359 if (state->n_rdonly == 0) {
1360 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1361 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1363 if (state->n_wronly == 0) {
1364 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1365 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1368 spin_unlock(&state->owner->so_lock);
1369 if (!clear_rd && !clear_wr && !clear_rdwr) {
1370 /* Note: exit _without_ calling nfs4_close_done */
1371 task->tk_action = NULL;
1374 nfs_fattr_init(calldata->res.fattr);
1375 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1376 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1377 calldata->arg.open_flags = FMODE_READ;
1378 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1380 calldata->arg.open_flags = FMODE_WRITE;
1382 calldata->timestamp = jiffies;
1383 rpc_call_start(task);
1386 static const struct rpc_call_ops nfs4_close_ops = {
1387 .rpc_call_prepare = nfs4_close_prepare,
1388 .rpc_call_done = nfs4_close_done,
1389 .rpc_release = nfs4_free_closedata,
1393 * It is possible for data to be read/written from a mem-mapped file
1394 * after the sys_close call (which hits the vfs layer as a flush).
1395 * This means that we can't safely call nfsv4 close on a file until
1396 * the inode is cleared. This in turn means that we are not good
1397 * NFSv4 citizens - we do not indicate to the server to update the file's
1398 * share state even when we are done with one of the three share
1399 * stateid's in the inode.
1401 * NOTE: Caller must be holding the sp->so_owner semaphore!
1403 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1405 struct nfs_server *server = NFS_SERVER(state->inode);
1406 struct nfs4_closedata *calldata;
1407 struct nfs4_state_owner *sp = state->owner;
1408 struct rpc_task *task;
1409 struct rpc_message msg = {
1410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1411 .rpc_cred = state->owner->so_cred,
1413 struct rpc_task_setup task_setup_data = {
1414 .rpc_client = server->client,
1415 .rpc_message = &msg,
1416 .callback_ops = &nfs4_close_ops,
1417 .workqueue = nfsiod_workqueue,
1418 .flags = RPC_TASK_ASYNC,
1420 int status = -ENOMEM;
1422 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1423 if (calldata == NULL)
1425 calldata->inode = state->inode;
1426 calldata->state = state;
1427 calldata->arg.fh = NFS_FH(state->inode);
1428 calldata->arg.stateid = &state->open_stateid;
1429 /* Serialization for the sequence id */
1430 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1431 if (calldata->arg.seqid == NULL)
1432 goto out_free_calldata;
1433 calldata->arg.open_flags = 0;
1434 calldata->arg.bitmask = server->attr_bitmask;
1435 calldata->res.fattr = &calldata->fattr;
1436 calldata->res.seqid = calldata->arg.seqid;
1437 calldata->res.server = server;
1438 calldata->path.mnt = mntget(path->mnt);
1439 calldata->path.dentry = dget(path->dentry);
1441 msg.rpc_argp = &calldata->arg,
1442 msg.rpc_resp = &calldata->res,
1443 task_setup_data.callback_data = calldata;
1444 task = rpc_run_task(&task_setup_data);
1446 return PTR_ERR(task);
1449 status = rpc_wait_for_completion_task(task);
1455 nfs4_put_open_state(state);
1456 nfs4_put_state_owner(sp);
1460 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1465 /* If the open_intent is for execute, we have an extra check to make */
1466 if (nd->intent.open.flags & FMODE_EXEC) {
1467 ret = nfs_may_open(state->inode,
1468 state->owner->so_cred,
1469 nd->intent.open.flags);
1473 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1474 if (!IS_ERR(filp)) {
1475 struct nfs_open_context *ctx;
1476 ctx = nfs_file_open_context(filp);
1480 ret = PTR_ERR(filp);
1482 nfs4_close_sync(path, state, nd->intent.open.flags);
1487 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1489 struct path path = {
1490 .mnt = nd->path.mnt,
1493 struct dentry *parent;
1495 struct rpc_cred *cred;
1496 struct nfs4_state *state;
1499 if (nd->flags & LOOKUP_CREATE) {
1500 attr.ia_mode = nd->intent.open.create_mode;
1501 attr.ia_valid = ATTR_MODE;
1502 if (!IS_POSIXACL(dir))
1503 attr.ia_mode &= ~current->fs->umask;
1506 BUG_ON(nd->intent.open.flags & O_CREAT);
1509 cred = rpc_lookup_cred();
1511 return (struct dentry *)cred;
1512 parent = dentry->d_parent;
1513 /* Protect against concurrent sillydeletes */
1514 nfs_block_sillyrename(parent);
1515 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1517 if (IS_ERR(state)) {
1518 if (PTR_ERR(state) == -ENOENT) {
1519 d_add(dentry, NULL);
1520 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1522 nfs_unblock_sillyrename(parent);
1523 return (struct dentry *)state;
1525 res = d_add_unique(dentry, igrab(state->inode));
1528 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1529 nfs_unblock_sillyrename(parent);
1530 nfs4_intent_set_file(nd, &path, state);
1535 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1537 struct path path = {
1538 .mnt = nd->path.mnt,
1541 struct rpc_cred *cred;
1542 struct nfs4_state *state;
1544 cred = rpc_lookup_cred();
1546 return PTR_ERR(cred);
1547 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1549 if (IS_ERR(state)) {
1550 switch (PTR_ERR(state)) {
1556 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1562 if (state->inode == dentry->d_inode) {
1563 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1564 nfs4_intent_set_file(nd, &path, state);
1567 nfs4_close_sync(&path, state, openflags);
1574 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1576 struct nfs4_server_caps_res res = {};
1577 struct rpc_message msg = {
1578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1579 .rpc_argp = fhandle,
1584 status = rpc_call_sync(server->client, &msg, 0);
1586 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1587 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1588 server->caps |= NFS_CAP_ACLS;
1589 if (res.has_links != 0)
1590 server->caps |= NFS_CAP_HARDLINKS;
1591 if (res.has_symlinks != 0)
1592 server->caps |= NFS_CAP_SYMLINKS;
1593 server->acl_bitmask = res.acl_bitmask;
1598 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1600 struct nfs4_exception exception = { };
1603 err = nfs4_handle_exception(server,
1604 _nfs4_server_capabilities(server, fhandle),
1606 } while (exception.retry);
1610 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1611 struct nfs_fsinfo *info)
1613 struct nfs4_lookup_root_arg args = {
1614 .bitmask = nfs4_fattr_bitmap,
1616 struct nfs4_lookup_res res = {
1618 .fattr = info->fattr,
1621 struct rpc_message msg = {
1622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1626 nfs_fattr_init(info->fattr);
1627 return rpc_call_sync(server->client, &msg, 0);
1630 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1631 struct nfs_fsinfo *info)
1633 struct nfs4_exception exception = { };
1636 err = nfs4_handle_exception(server,
1637 _nfs4_lookup_root(server, fhandle, info),
1639 } while (exception.retry);
1644 * get the file handle for the "/" directory on the server
1646 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1647 struct nfs_fsinfo *info)
1651 status = nfs4_lookup_root(server, fhandle, info);
1653 status = nfs4_server_capabilities(server, fhandle);
1655 status = nfs4_do_fsinfo(server, fhandle, info);
1656 return nfs4_map_errors(status);
1660 * Get locations and (maybe) other attributes of a referral.
1661 * Note that we'll actually follow the referral later when
1662 * we detect fsid mismatch in inode revalidation
1664 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1666 int status = -ENOMEM;
1667 struct page *page = NULL;
1668 struct nfs4_fs_locations *locations = NULL;
1670 page = alloc_page(GFP_KERNEL);
1673 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1674 if (locations == NULL)
1677 status = nfs4_proc_fs_locations(dir, name, locations, page);
1680 /* Make sure server returned a different fsid for the referral */
1681 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1682 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1687 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1688 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1690 fattr->mode = S_IFDIR;
1691 memset(fhandle, 0, sizeof(struct nfs_fh));
1700 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1702 struct nfs4_getattr_arg args = {
1704 .bitmask = server->attr_bitmask,
1706 struct nfs4_getattr_res res = {
1710 struct rpc_message msg = {
1711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1716 nfs_fattr_init(fattr);
1717 return rpc_call_sync(server->client, &msg, 0);
1720 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1722 struct nfs4_exception exception = { };
1725 err = nfs4_handle_exception(server,
1726 _nfs4_proc_getattr(server, fhandle, fattr),
1728 } while (exception.retry);
1733 * The file is not closed if it is opened due to the a request to change
1734 * the size of the file. The open call will not be needed once the
1735 * VFS layer lookup-intents are implemented.
1737 * Close is called when the inode is destroyed.
1738 * If we haven't opened the file for O_WRONLY, we
1739 * need to in the size_change case to obtain a stateid.
1742 * Because OPEN is always done by name in nfsv4, it is
1743 * possible that we opened a different file by the same
1744 * name. We can recognize this race condition, but we
1745 * can't do anything about it besides returning an error.
1747 * This will be fixed with VFS changes (lookup-intent).
1750 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1751 struct iattr *sattr)
1753 struct inode *inode = dentry->d_inode;
1754 struct rpc_cred *cred = NULL;
1755 struct nfs4_state *state = NULL;
1758 nfs_fattr_init(fattr);
1760 /* Search for an existing open(O_WRITE) file */
1761 if (sattr->ia_valid & ATTR_FILE) {
1762 struct nfs_open_context *ctx;
1764 ctx = nfs_file_open_context(sattr->ia_file);
1771 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1773 nfs_setattr_update_inode(inode, sattr);
1777 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1778 const struct qstr *name, struct nfs_fh *fhandle,
1779 struct nfs_fattr *fattr)
1782 struct nfs4_lookup_arg args = {
1783 .bitmask = server->attr_bitmask,
1787 struct nfs4_lookup_res res = {
1792 struct rpc_message msg = {
1793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1798 nfs_fattr_init(fattr);
1800 dprintk("NFS call lookupfh %s\n", name->name);
1801 status = rpc_call_sync(server->client, &msg, 0);
1802 dprintk("NFS reply lookupfh: %d\n", status);
1806 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1807 struct qstr *name, struct nfs_fh *fhandle,
1808 struct nfs_fattr *fattr)
1810 struct nfs4_exception exception = { };
1813 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1815 if (err == -NFS4ERR_MOVED) {
1819 err = nfs4_handle_exception(server, err, &exception);
1820 } while (exception.retry);
1824 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1825 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1829 dprintk("NFS call lookup %s\n", name->name);
1830 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1831 if (status == -NFS4ERR_MOVED)
1832 status = nfs4_get_referral(dir, name, fattr, fhandle);
1833 dprintk("NFS reply lookup: %d\n", status);
1837 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1839 struct nfs4_exception exception = { };
1842 err = nfs4_handle_exception(NFS_SERVER(dir),
1843 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1845 } while (exception.retry);
1849 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1851 struct nfs_server *server = NFS_SERVER(inode);
1852 struct nfs_fattr fattr;
1853 struct nfs4_accessargs args = {
1854 .fh = NFS_FH(inode),
1855 .bitmask = server->attr_bitmask,
1857 struct nfs4_accessres res = {
1861 struct rpc_message msg = {
1862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1865 .rpc_cred = entry->cred,
1867 int mode = entry->mask;
1871 * Determine which access bits we want to ask for...
1873 if (mode & MAY_READ)
1874 args.access |= NFS4_ACCESS_READ;
1875 if (S_ISDIR(inode->i_mode)) {
1876 if (mode & MAY_WRITE)
1877 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1878 if (mode & MAY_EXEC)
1879 args.access |= NFS4_ACCESS_LOOKUP;
1881 if (mode & MAY_WRITE)
1882 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1883 if (mode & MAY_EXEC)
1884 args.access |= NFS4_ACCESS_EXECUTE;
1886 nfs_fattr_init(&fattr);
1887 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1890 if (res.access & NFS4_ACCESS_READ)
1891 entry->mask |= MAY_READ;
1892 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1893 entry->mask |= MAY_WRITE;
1894 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1895 entry->mask |= MAY_EXEC;
1896 nfs_refresh_inode(inode, &fattr);
1901 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1903 struct nfs4_exception exception = { };
1906 err = nfs4_handle_exception(NFS_SERVER(inode),
1907 _nfs4_proc_access(inode, entry),
1909 } while (exception.retry);
1914 * TODO: For the time being, we don't try to get any attributes
1915 * along with any of the zero-copy operations READ, READDIR,
1918 * In the case of the first three, we want to put the GETATTR
1919 * after the read-type operation -- this is because it is hard
1920 * to predict the length of a GETATTR response in v4, and thus
1921 * align the READ data correctly. This means that the GETATTR
1922 * may end up partially falling into the page cache, and we should
1923 * shift it into the 'tail' of the xdr_buf before processing.
1924 * To do this efficiently, we need to know the total length
1925 * of data received, which doesn't seem to be available outside
1928 * In the case of WRITE, we also want to put the GETATTR after
1929 * the operation -- in this case because we want to make sure
1930 * we get the post-operation mtime and size. This means that
1931 * we can't use xdr_encode_pages() as written: we need a variant
1932 * of it which would leave room in the 'tail' iovec.
1934 * Both of these changes to the XDR layer would in fact be quite
1935 * minor, but I decided to leave them for a subsequent patch.
1937 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1938 unsigned int pgbase, unsigned int pglen)
1940 struct nfs4_readlink args = {
1941 .fh = NFS_FH(inode),
1946 struct rpc_message msg = {
1947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1952 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1955 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1956 unsigned int pgbase, unsigned int pglen)
1958 struct nfs4_exception exception = { };
1961 err = nfs4_handle_exception(NFS_SERVER(inode),
1962 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1964 } while (exception.retry);
1970 * We will need to arrange for the VFS layer to provide an atomic open.
1971 * Until then, this create/open method is prone to inefficiency and race
1972 * conditions due to the lookup, create, and open VFS calls from sys_open()
1973 * placed on the wire.
1975 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1976 * The file will be opened again in the subsequent VFS open call
1977 * (nfs4_proc_file_open).
1979 * The open for read will just hang around to be used by any process that
1980 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1984 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1985 int flags, struct nameidata *nd)
1987 struct path path = {
1988 .mnt = nd->path.mnt,
1991 struct nfs4_state *state;
1992 struct rpc_cred *cred;
1995 cred = rpc_lookup_cred();
1997 status = PTR_ERR(cred);
2000 state = nfs4_do_open(dir, &path, flags, sattr, cred);
2002 if (IS_ERR(state)) {
2003 status = PTR_ERR(state);
2006 d_add(dentry, igrab(state->inode));
2007 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2008 if (flags & O_EXCL) {
2009 struct nfs_fattr fattr;
2010 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2012 nfs_setattr_update_inode(state->inode, sattr);
2013 nfs_post_op_update_inode(state->inode, &fattr);
2015 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2016 status = nfs4_intent_set_file(nd, &path, state);
2018 nfs4_close_sync(&path, state, flags);
2025 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2027 struct nfs_server *server = NFS_SERVER(dir);
2028 struct nfs_removeargs args = {
2030 .name.len = name->len,
2031 .name.name = name->name,
2032 .bitmask = server->attr_bitmask,
2034 struct nfs_removeres res = {
2037 struct rpc_message msg = {
2038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2044 nfs_fattr_init(&res.dir_attr);
2045 status = rpc_call_sync(server->client, &msg, 0);
2047 update_changeattr(dir, &res.cinfo);
2048 nfs_post_op_update_inode(dir, &res.dir_attr);
2053 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2055 struct nfs4_exception exception = { };
2058 err = nfs4_handle_exception(NFS_SERVER(dir),
2059 _nfs4_proc_remove(dir, name),
2061 } while (exception.retry);
2065 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2067 struct nfs_server *server = NFS_SERVER(dir);
2068 struct nfs_removeargs *args = msg->rpc_argp;
2069 struct nfs_removeres *res = msg->rpc_resp;
2071 args->bitmask = server->attr_bitmask;
2072 res->server = server;
2073 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2076 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2078 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2080 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2082 update_changeattr(dir, &res->cinfo);
2083 nfs_post_op_update_inode(dir, &res->dir_attr);
2087 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2088 struct inode *new_dir, struct qstr *new_name)
2090 struct nfs_server *server = NFS_SERVER(old_dir);
2091 struct nfs4_rename_arg arg = {
2092 .old_dir = NFS_FH(old_dir),
2093 .new_dir = NFS_FH(new_dir),
2094 .old_name = old_name,
2095 .new_name = new_name,
2096 .bitmask = server->attr_bitmask,
2098 struct nfs_fattr old_fattr, new_fattr;
2099 struct nfs4_rename_res res = {
2101 .old_fattr = &old_fattr,
2102 .new_fattr = &new_fattr,
2104 struct rpc_message msg = {
2105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2111 nfs_fattr_init(res.old_fattr);
2112 nfs_fattr_init(res.new_fattr);
2113 status = rpc_call_sync(server->client, &msg, 0);
2116 update_changeattr(old_dir, &res.old_cinfo);
2117 nfs_post_op_update_inode(old_dir, res.old_fattr);
2118 update_changeattr(new_dir, &res.new_cinfo);
2119 nfs_post_op_update_inode(new_dir, res.new_fattr);
2124 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2125 struct inode *new_dir, struct qstr *new_name)
2127 struct nfs4_exception exception = { };
2130 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2131 _nfs4_proc_rename(old_dir, old_name,
2134 } while (exception.retry);
2138 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2140 struct nfs_server *server = NFS_SERVER(inode);
2141 struct nfs4_link_arg arg = {
2142 .fh = NFS_FH(inode),
2143 .dir_fh = NFS_FH(dir),
2145 .bitmask = server->attr_bitmask,
2147 struct nfs_fattr fattr, dir_attr;
2148 struct nfs4_link_res res = {
2151 .dir_attr = &dir_attr,
2153 struct rpc_message msg = {
2154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2160 nfs_fattr_init(res.fattr);
2161 nfs_fattr_init(res.dir_attr);
2162 status = rpc_call_sync(server->client, &msg, 0);
2164 update_changeattr(dir, &res.cinfo);
2165 nfs_post_op_update_inode(dir, res.dir_attr);
2166 nfs_post_op_update_inode(inode, res.fattr);
2172 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2174 struct nfs4_exception exception = { };
2177 err = nfs4_handle_exception(NFS_SERVER(inode),
2178 _nfs4_proc_link(inode, dir, name),
2180 } while (exception.retry);
2184 struct nfs4_createdata {
2185 struct rpc_message msg;
2186 struct nfs4_create_arg arg;
2187 struct nfs4_create_res res;
2189 struct nfs_fattr fattr;
2190 struct nfs_fattr dir_fattr;
2193 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2194 struct qstr *name, struct iattr *sattr, u32 ftype)
2196 struct nfs4_createdata *data;
2198 data = kzalloc(sizeof(*data), GFP_KERNEL);
2200 struct nfs_server *server = NFS_SERVER(dir);
2202 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2203 data->msg.rpc_argp = &data->arg;
2204 data->msg.rpc_resp = &data->res;
2205 data->arg.dir_fh = NFS_FH(dir);
2206 data->arg.server = server;
2207 data->arg.name = name;
2208 data->arg.attrs = sattr;
2209 data->arg.ftype = ftype;
2210 data->arg.bitmask = server->attr_bitmask;
2211 data->res.server = server;
2212 data->res.fh = &data->fh;
2213 data->res.fattr = &data->fattr;
2214 data->res.dir_fattr = &data->dir_fattr;
2215 nfs_fattr_init(data->res.fattr);
2216 nfs_fattr_init(data->res.dir_fattr);
2221 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2223 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2225 update_changeattr(dir, &data->res.dir_cinfo);
2226 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2227 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2232 static void nfs4_free_createdata(struct nfs4_createdata *data)
2237 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2238 struct page *page, unsigned int len, struct iattr *sattr)
2240 struct nfs4_createdata *data;
2241 int status = -ENAMETOOLONG;
2243 if (len > NFS4_MAXPATHLEN)
2247 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2251 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2252 data->arg.u.symlink.pages = &page;
2253 data->arg.u.symlink.len = len;
2255 status = nfs4_do_create(dir, dentry, data);
2257 nfs4_free_createdata(data);
2262 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2263 struct page *page, unsigned int len, struct iattr *sattr)
2265 struct nfs4_exception exception = { };
2268 err = nfs4_handle_exception(NFS_SERVER(dir),
2269 _nfs4_proc_symlink(dir, dentry, page,
2272 } while (exception.retry);
2276 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2277 struct iattr *sattr)
2279 struct nfs4_createdata *data;
2280 int status = -ENOMEM;
2282 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2286 status = nfs4_do_create(dir, dentry, data);
2288 nfs4_free_createdata(data);
2293 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2294 struct iattr *sattr)
2296 struct nfs4_exception exception = { };
2299 err = nfs4_handle_exception(NFS_SERVER(dir),
2300 _nfs4_proc_mkdir(dir, dentry, sattr),
2302 } while (exception.retry);
2306 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2307 u64 cookie, struct page *page, unsigned int count, int plus)
2309 struct inode *dir = dentry->d_inode;
2310 struct nfs4_readdir_arg args = {
2315 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2317 struct nfs4_readdir_res res;
2318 struct rpc_message msg = {
2319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2326 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2327 dentry->d_parent->d_name.name,
2328 dentry->d_name.name,
2329 (unsigned long long)cookie);
2330 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2331 res.pgbase = args.pgbase;
2332 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2334 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2336 nfs_invalidate_atime(dir);
2338 dprintk("%s: returns %d\n", __func__, status);
2342 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2343 u64 cookie, struct page *page, unsigned int count, int plus)
2345 struct nfs4_exception exception = { };
2348 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2349 _nfs4_proc_readdir(dentry, cred, cookie,
2352 } while (exception.retry);
2356 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2357 struct iattr *sattr, dev_t rdev)
2359 struct nfs4_createdata *data;
2360 int mode = sattr->ia_mode;
2361 int status = -ENOMEM;
2363 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2364 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2366 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2371 data->arg.ftype = NF4FIFO;
2372 else if (S_ISBLK(mode)) {
2373 data->arg.ftype = NF4BLK;
2374 data->arg.u.device.specdata1 = MAJOR(rdev);
2375 data->arg.u.device.specdata2 = MINOR(rdev);
2377 else if (S_ISCHR(mode)) {
2378 data->arg.ftype = NF4CHR;
2379 data->arg.u.device.specdata1 = MAJOR(rdev);
2380 data->arg.u.device.specdata2 = MINOR(rdev);
2383 status = nfs4_do_create(dir, dentry, data);
2385 nfs4_free_createdata(data);
2390 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2391 struct iattr *sattr, dev_t rdev)
2393 struct nfs4_exception exception = { };
2396 err = nfs4_handle_exception(NFS_SERVER(dir),
2397 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2399 } while (exception.retry);
2403 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_fsstat *fsstat)
2406 struct nfs4_statfs_arg args = {
2408 .bitmask = server->attr_bitmask,
2410 struct rpc_message msg = {
2411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2416 nfs_fattr_init(fsstat->fattr);
2417 return rpc_call_sync(server->client, &msg, 0);
2420 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2422 struct nfs4_exception exception = { };
2425 err = nfs4_handle_exception(server,
2426 _nfs4_proc_statfs(server, fhandle, fsstat),
2428 } while (exception.retry);
2432 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2433 struct nfs_fsinfo *fsinfo)
2435 struct nfs4_fsinfo_arg args = {
2437 .bitmask = server->attr_bitmask,
2439 struct rpc_message msg = {
2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2445 return rpc_call_sync(server->client, &msg, 0);
2448 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2450 struct nfs4_exception exception = { };
2454 err = nfs4_handle_exception(server,
2455 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2457 } while (exception.retry);
2461 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2463 nfs_fattr_init(fsinfo->fattr);
2464 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2467 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2468 struct nfs_pathconf *pathconf)
2470 struct nfs4_pathconf_arg args = {
2472 .bitmask = server->attr_bitmask,
2474 struct rpc_message msg = {
2475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2477 .rpc_resp = pathconf,
2480 /* None of the pathconf attributes are mandatory to implement */
2481 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2482 memset(pathconf, 0, sizeof(*pathconf));
2486 nfs_fattr_init(pathconf->fattr);
2487 return rpc_call_sync(server->client, &msg, 0);
2490 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2491 struct nfs_pathconf *pathconf)
2493 struct nfs4_exception exception = { };
2497 err = nfs4_handle_exception(server,
2498 _nfs4_proc_pathconf(server, fhandle, pathconf),
2500 } while (exception.retry);
2504 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2506 struct nfs_server *server = NFS_SERVER(data->inode);
2508 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2509 rpc_restart_call(task);
2513 nfs_invalidate_atime(data->inode);
2514 if (task->tk_status > 0)
2515 renew_lease(server, data->timestamp);
2519 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2521 data->timestamp = jiffies;
2522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2525 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2527 struct inode *inode = data->inode;
2529 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2530 rpc_restart_call(task);
2533 if (task->tk_status >= 0) {
2534 renew_lease(NFS_SERVER(inode), data->timestamp);
2535 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2540 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2542 struct nfs_server *server = NFS_SERVER(data->inode);
2544 data->args.bitmask = server->attr_bitmask;
2545 data->res.server = server;
2546 data->timestamp = jiffies;
2548 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2551 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2553 struct inode *inode = data->inode;
2555 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2556 rpc_restart_call(task);
2559 nfs_refresh_inode(inode, data->res.fattr);
2563 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2565 struct nfs_server *server = NFS_SERVER(data->inode);
2567 data->args.bitmask = server->attr_bitmask;
2568 data->res.server = server;
2569 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2573 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2574 * standalone procedure for queueing an asynchronous RENEW.
2576 static void nfs4_renew_done(struct rpc_task *task, void *data)
2578 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2579 unsigned long timestamp = (unsigned long)data;
2581 if (task->tk_status < 0) {
2582 switch (task->tk_status) {
2583 case -NFS4ERR_STALE_CLIENTID:
2584 case -NFS4ERR_EXPIRED:
2585 case -NFS4ERR_CB_PATH_DOWN:
2586 nfs4_schedule_state_recovery(clp);
2590 spin_lock(&clp->cl_lock);
2591 if (time_before(clp->cl_last_renewal,timestamp))
2592 clp->cl_last_renewal = timestamp;
2593 spin_unlock(&clp->cl_lock);
2596 static const struct rpc_call_ops nfs4_renew_ops = {
2597 .rpc_call_done = nfs4_renew_done,
2600 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2602 struct rpc_message msg = {
2603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2608 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2609 &nfs4_renew_ops, (void *)jiffies);
2612 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2614 struct rpc_message msg = {
2615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2619 unsigned long now = jiffies;
2622 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2625 spin_lock(&clp->cl_lock);
2626 if (time_before(clp->cl_last_renewal,now))
2627 clp->cl_last_renewal = now;
2628 spin_unlock(&clp->cl_lock);
2632 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2634 return (server->caps & NFS_CAP_ACLS)
2635 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2636 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2639 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2640 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2643 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2645 static void buf_to_pages(const void *buf, size_t buflen,
2646 struct page **pages, unsigned int *pgbase)
2648 const void *p = buf;
2650 *pgbase = offset_in_page(buf);
2652 while (p < buf + buflen) {
2653 *(pages++) = virt_to_page(p);
2654 p += PAGE_CACHE_SIZE;
2658 struct nfs4_cached_acl {
2664 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2666 struct nfs_inode *nfsi = NFS_I(inode);
2668 spin_lock(&inode->i_lock);
2669 kfree(nfsi->nfs4_acl);
2670 nfsi->nfs4_acl = acl;
2671 spin_unlock(&inode->i_lock);
2674 static void nfs4_zap_acl_attr(struct inode *inode)
2676 nfs4_set_cached_acl(inode, NULL);
2679 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2681 struct nfs_inode *nfsi = NFS_I(inode);
2682 struct nfs4_cached_acl *acl;
2685 spin_lock(&inode->i_lock);
2686 acl = nfsi->nfs4_acl;
2689 if (buf == NULL) /* user is just asking for length */
2691 if (acl->cached == 0)
2693 ret = -ERANGE; /* see getxattr(2) man page */
2694 if (acl->len > buflen)
2696 memcpy(buf, acl->data, acl->len);
2700 spin_unlock(&inode->i_lock);
2704 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2706 struct nfs4_cached_acl *acl;
2708 if (buf && acl_len <= PAGE_SIZE) {
2709 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2713 memcpy(acl->data, buf, acl_len);
2715 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2722 nfs4_set_cached_acl(inode, acl);
2725 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2727 struct page *pages[NFS4ACL_MAXPAGES];
2728 struct nfs_getaclargs args = {
2729 .fh = NFS_FH(inode),
2733 size_t resp_len = buflen;
2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2738 .rpc_resp = &resp_len,
2740 struct page *localpage = NULL;
2743 if (buflen < PAGE_SIZE) {
2744 /* As long as we're doing a round trip to the server anyway,
2745 * let's be prepared for a page of acl data. */
2746 localpage = alloc_page(GFP_KERNEL);
2747 resp_buf = page_address(localpage);
2748 if (localpage == NULL)
2750 args.acl_pages[0] = localpage;
2751 args.acl_pgbase = 0;
2752 resp_len = args.acl_len = PAGE_SIZE;
2755 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2757 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2760 if (resp_len > args.acl_len)
2761 nfs4_write_cached_acl(inode, NULL, resp_len);
2763 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2766 if (resp_len > buflen)
2769 memcpy(buf, resp_buf, resp_len);
2774 __free_page(localpage);
2778 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2780 struct nfs4_exception exception = { };
2783 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2786 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2787 } while (exception.retry);
2791 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2793 struct nfs_server *server = NFS_SERVER(inode);
2796 if (!nfs4_server_supports_acls(server))
2798 ret = nfs_revalidate_inode(server, inode);
2801 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2802 nfs_zap_acl_cache(inode);
2803 ret = nfs4_read_cached_acl(inode, buf, buflen);
2806 return nfs4_get_acl_uncached(inode, buf, buflen);
2809 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2811 struct nfs_server *server = NFS_SERVER(inode);
2812 struct page *pages[NFS4ACL_MAXPAGES];
2813 struct nfs_setaclargs arg = {
2814 .fh = NFS_FH(inode),
2818 struct rpc_message msg = {
2819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2825 if (!nfs4_server_supports_acls(server))
2827 nfs_inode_return_delegation(inode);
2828 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2829 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2830 nfs_access_zap_cache(inode);
2831 nfs_zap_acl_cache(inode);
2835 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2837 struct nfs4_exception exception = { };
2840 err = nfs4_handle_exception(NFS_SERVER(inode),
2841 __nfs4_proc_set_acl(inode, buf, buflen),
2843 } while (exception.retry);
2848 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
2850 struct nfs_client *clp = server->nfs_client;
2852 if (!clp || task->tk_status >= 0)
2854 switch(task->tk_status) {
2855 case -NFS4ERR_ADMIN_REVOKED:
2856 case -NFS4ERR_BAD_STATEID:
2857 case -NFS4ERR_OPENMODE:
2860 nfs4_state_mark_reclaim_nograce(clp, state);
2861 case -NFS4ERR_STALE_CLIENTID:
2862 case -NFS4ERR_STALE_STATEID:
2863 case -NFS4ERR_EXPIRED:
2864 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2865 nfs4_schedule_state_recovery(clp);
2866 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
2867 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2868 task->tk_status = 0;
2870 case -NFS4ERR_DELAY:
2871 nfs_inc_server_stats(server, NFSIOS_DELAY);
2872 case -NFS4ERR_GRACE:
2873 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2874 task->tk_status = 0;
2876 case -NFS4ERR_OLD_STATEID:
2877 task->tk_status = 0;
2880 task->tk_status = nfs4_map_errors(task->tk_status);
2884 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2886 nfs4_verifier sc_verifier;
2887 struct nfs4_setclientid setclientid = {
2888 .sc_verifier = &sc_verifier,
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2893 .rpc_argp = &setclientid,
2901 p = (__be32*)sc_verifier.data;
2902 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2903 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2906 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2907 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2909 rpc_peeraddr2str(clp->cl_rpcclient,
2911 rpc_peeraddr2str(clp->cl_rpcclient,
2913 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2914 clp->cl_id_uniquifier);
2915 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2916 sizeof(setclientid.sc_netid),
2917 rpc_peeraddr2str(clp->cl_rpcclient,
2918 RPC_DISPLAY_NETID));
2919 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2920 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2921 clp->cl_ipaddr, port >> 8, port & 255);
2923 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2924 if (status != -NFS4ERR_CLID_INUSE)
2929 ssleep(clp->cl_lease_time + 1);
2931 if (++clp->cl_id_uniquifier == 0)
2937 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2939 struct nfs_fsinfo fsinfo;
2940 struct rpc_message msg = {
2941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2943 .rpc_resp = &fsinfo,
2950 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2952 spin_lock(&clp->cl_lock);
2953 clp->cl_lease_time = fsinfo.lease_time * HZ;
2954 clp->cl_last_renewal = now;
2955 spin_unlock(&clp->cl_lock);
2960 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2965 err = _nfs4_proc_setclientid_confirm(clp, cred);
2969 case -NFS4ERR_RESOURCE:
2970 /* The IBM lawyers misread another document! */
2971 case -NFS4ERR_DELAY:
2972 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2978 struct nfs4_delegreturndata {
2979 struct nfs4_delegreturnargs args;
2980 struct nfs4_delegreturnres res;
2982 nfs4_stateid stateid;
2983 unsigned long timestamp;
2984 struct nfs_fattr fattr;
2988 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2990 struct nfs4_delegreturndata *data = calldata;
2991 data->rpc_status = task->tk_status;
2992 if (data->rpc_status == 0)
2993 renew_lease(data->res.server, data->timestamp);
2996 static void nfs4_delegreturn_release(void *calldata)
3001 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3002 .rpc_call_done = nfs4_delegreturn_done,
3003 .rpc_release = nfs4_delegreturn_release,
3006 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3008 struct nfs4_delegreturndata *data;
3009 struct nfs_server *server = NFS_SERVER(inode);
3010 struct rpc_task *task;
3011 struct rpc_message msg = {
3012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3015 struct rpc_task_setup task_setup_data = {
3016 .rpc_client = server->client,
3017 .rpc_message = &msg,
3018 .callback_ops = &nfs4_delegreturn_ops,
3019 .flags = RPC_TASK_ASYNC,
3023 data = kmalloc(sizeof(*data), GFP_KERNEL);
3026 data->args.fhandle = &data->fh;
3027 data->args.stateid = &data->stateid;
3028 data->args.bitmask = server->attr_bitmask;
3029 nfs_copy_fh(&data->fh, NFS_FH(inode));
3030 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3031 data->res.fattr = &data->fattr;
3032 data->res.server = server;
3033 nfs_fattr_init(data->res.fattr);
3034 data->timestamp = jiffies;
3035 data->rpc_status = 0;
3037 task_setup_data.callback_data = data;
3038 msg.rpc_argp = &data->args,
3039 msg.rpc_resp = &data->res,
3040 task = rpc_run_task(&task_setup_data);
3042 return PTR_ERR(task);
3045 status = nfs4_wait_for_completion_rpc_task(task);
3048 status = data->rpc_status;
3051 nfs_refresh_inode(inode, &data->fattr);
3057 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3059 struct nfs_server *server = NFS_SERVER(inode);
3060 struct nfs4_exception exception = { };
3063 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3065 case -NFS4ERR_STALE_STATEID:
3066 case -NFS4ERR_EXPIRED:
3070 err = nfs4_handle_exception(server, err, &exception);
3071 } while (exception.retry);
3075 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3076 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3079 * sleep, with exponential backoff, and retry the LOCK operation.
3081 static unsigned long
3082 nfs4_set_lock_task_retry(unsigned long timeout)
3084 schedule_timeout_killable(timeout);
3086 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3087 return NFS4_LOCK_MAXTIMEOUT;
3091 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3093 struct inode *inode = state->inode;
3094 struct nfs_server *server = NFS_SERVER(inode);
3095 struct nfs_client *clp = server->nfs_client;
3096 struct nfs_lockt_args arg = {
3097 .fh = NFS_FH(inode),
3100 struct nfs_lockt_res res = {
3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3107 .rpc_cred = state->owner->so_cred,
3109 struct nfs4_lock_state *lsp;
3112 arg.lock_owner.clientid = clp->cl_clientid;
3113 status = nfs4_set_lock_state(state, request);
3116 lsp = request->fl_u.nfs4_fl.owner;
3117 arg.lock_owner.id = lsp->ls_id.id;
3118 status = rpc_call_sync(server->client, &msg, 0);
3121 request->fl_type = F_UNLCK;
3123 case -NFS4ERR_DENIED:
3126 request->fl_ops->fl_release_private(request);
3131 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3133 struct nfs4_exception exception = { };
3137 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3138 _nfs4_proc_getlk(state, cmd, request),
3140 } while (exception.retry);
3144 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3147 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3149 res = posix_lock_file_wait(file, fl);
3152 res = flock_lock_file_wait(file, fl);
3160 struct nfs4_unlockdata {
3161 struct nfs_locku_args arg;
3162 struct nfs_locku_res res;
3163 struct nfs4_lock_state *lsp;
3164 struct nfs_open_context *ctx;
3165 struct file_lock fl;
3166 const struct nfs_server *server;
3167 unsigned long timestamp;
3170 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3171 struct nfs_open_context *ctx,
3172 struct nfs4_lock_state *lsp,
3173 struct nfs_seqid *seqid)
3175 struct nfs4_unlockdata *p;
3176 struct inode *inode = lsp->ls_state->inode;
3178 p = kmalloc(sizeof(*p), GFP_KERNEL);
3181 p->arg.fh = NFS_FH(inode);
3183 p->arg.seqid = seqid;
3184 p->res.seqid = seqid;
3185 p->arg.stateid = &lsp->ls_stateid;
3187 atomic_inc(&lsp->ls_count);
3188 /* Ensure we don't close file until we're done freeing locks! */
3189 p->ctx = get_nfs_open_context(ctx);
3190 memcpy(&p->fl, fl, sizeof(p->fl));
3191 p->server = NFS_SERVER(inode);
3195 static void nfs4_locku_release_calldata(void *data)
3197 struct nfs4_unlockdata *calldata = data;
3198 nfs_free_seqid(calldata->arg.seqid);
3199 nfs4_put_lock_state(calldata->lsp);
3200 put_nfs_open_context(calldata->ctx);
3204 static void nfs4_locku_done(struct rpc_task *task, void *data)
3206 struct nfs4_unlockdata *calldata = data;
3208 if (RPC_ASSASSINATED(task))
3210 switch (task->tk_status) {
3212 memcpy(calldata->lsp->ls_stateid.data,
3213 calldata->res.stateid.data,
3214 sizeof(calldata->lsp->ls_stateid.data));
3215 renew_lease(calldata->server, calldata->timestamp);
3217 case -NFS4ERR_BAD_STATEID:
3218 case -NFS4ERR_OLD_STATEID:
3219 case -NFS4ERR_STALE_STATEID:
3220 case -NFS4ERR_EXPIRED:
3223 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3224 rpc_restart_call(task);
3228 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3230 struct nfs4_unlockdata *calldata = data;
3232 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3234 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3235 /* Note: exit _without_ running nfs4_locku_done */
3236 task->tk_action = NULL;
3239 calldata->timestamp = jiffies;
3240 rpc_call_start(task);
3243 static const struct rpc_call_ops nfs4_locku_ops = {
3244 .rpc_call_prepare = nfs4_locku_prepare,
3245 .rpc_call_done = nfs4_locku_done,
3246 .rpc_release = nfs4_locku_release_calldata,
3249 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3250 struct nfs_open_context *ctx,
3251 struct nfs4_lock_state *lsp,
3252 struct nfs_seqid *seqid)
3254 struct nfs4_unlockdata *data;
3255 struct rpc_message msg = {
3256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3257 .rpc_cred = ctx->cred,
3259 struct rpc_task_setup task_setup_data = {
3260 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3261 .rpc_message = &msg,
3262 .callback_ops = &nfs4_locku_ops,
3263 .workqueue = nfsiod_workqueue,
3264 .flags = RPC_TASK_ASYNC,
3267 /* Ensure this is an unlock - when canceling a lock, the
3268 * canceled lock is passed in, and it won't be an unlock.
3270 fl->fl_type = F_UNLCK;
3272 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3274 nfs_free_seqid(seqid);
3275 return ERR_PTR(-ENOMEM);
3278 msg.rpc_argp = &data->arg,
3279 msg.rpc_resp = &data->res,
3280 task_setup_data.callback_data = data;
3281 return rpc_run_task(&task_setup_data);
3284 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3286 struct nfs_inode *nfsi = NFS_I(state->inode);
3287 struct nfs_seqid *seqid;
3288 struct nfs4_lock_state *lsp;
3289 struct rpc_task *task;
3291 unsigned char fl_flags = request->fl_flags;
3293 status = nfs4_set_lock_state(state, request);
3294 /* Unlock _before_ we do the RPC call */
3295 request->fl_flags |= FL_EXISTS;
3296 down_read(&nfsi->rwsem);
3297 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3298 up_read(&nfsi->rwsem);
3301 up_read(&nfsi->rwsem);
3304 /* Is this a delegated lock? */
3305 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3307 lsp = request->fl_u.nfs4_fl.owner;
3308 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3312 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3313 status = PTR_ERR(task);
3316 status = nfs4_wait_for_completion_rpc_task(task);
3319 request->fl_flags = fl_flags;
3323 struct nfs4_lockdata {
3324 struct nfs_lock_args arg;
3325 struct nfs_lock_res res;
3326 struct nfs4_lock_state *lsp;
3327 struct nfs_open_context *ctx;
3328 struct file_lock fl;
3329 unsigned long timestamp;
3334 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3335 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3337 struct nfs4_lockdata *p;
3338 struct inode *inode = lsp->ls_state->inode;
3339 struct nfs_server *server = NFS_SERVER(inode);
3341 p = kzalloc(sizeof(*p), GFP_KERNEL);
3345 p->arg.fh = NFS_FH(inode);
3347 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3348 if (p->arg.open_seqid == NULL)
3350 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3351 if (p->arg.lock_seqid == NULL)
3352 goto out_free_seqid;
3353 p->arg.lock_stateid = &lsp->ls_stateid;
3354 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3355 p->arg.lock_owner.id = lsp->ls_id.id;
3356 p->res.lock_seqid = p->arg.lock_seqid;
3358 atomic_inc(&lsp->ls_count);
3359 p->ctx = get_nfs_open_context(ctx);
3360 memcpy(&p->fl, fl, sizeof(p->fl));
3363 nfs_free_seqid(p->arg.open_seqid);
3369 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3371 struct nfs4_lockdata *data = calldata;
3372 struct nfs4_state *state = data->lsp->ls_state;
3374 dprintk("%s: begin!\n", __func__);
3375 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3377 /* Do we need to do an open_to_lock_owner? */
3378 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3379 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3381 data->arg.open_stateid = &state->stateid;
3382 data->arg.new_lock_owner = 1;
3383 data->res.open_seqid = data->arg.open_seqid;
3385 data->arg.new_lock_owner = 0;
3386 data->timestamp = jiffies;
3387 rpc_call_start(task);
3388 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3391 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3393 struct nfs4_lockdata *data = calldata;
3395 dprintk("%s: begin!\n", __func__);
3397 data->rpc_status = task->tk_status;
3398 if (RPC_ASSASSINATED(task))
3400 if (data->arg.new_lock_owner != 0) {
3401 if (data->rpc_status == 0)
3402 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3406 if (data->rpc_status == 0) {
3407 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3408 sizeof(data->lsp->ls_stateid.data));
3409 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3410 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3413 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3416 static void nfs4_lock_release(void *calldata)
3418 struct nfs4_lockdata *data = calldata;
3420 dprintk("%s: begin!\n", __func__);
3421 nfs_free_seqid(data->arg.open_seqid);
3422 if (data->cancelled != 0) {
3423 struct rpc_task *task;
3424 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3425 data->arg.lock_seqid);
3428 dprintk("%s: cancelling lock!\n", __func__);
3430 nfs_free_seqid(data->arg.lock_seqid);
3431 nfs4_put_lock_state(data->lsp);
3432 put_nfs_open_context(data->ctx);
3434 dprintk("%s: done!\n", __func__);
3437 static const struct rpc_call_ops nfs4_lock_ops = {
3438 .rpc_call_prepare = nfs4_lock_prepare,
3439 .rpc_call_done = nfs4_lock_done,
3440 .rpc_release = nfs4_lock_release,
3443 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3445 struct nfs4_lockdata *data;
3446 struct rpc_task *task;
3447 struct rpc_message msg = {
3448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3449 .rpc_cred = state->owner->so_cred,
3451 struct rpc_task_setup task_setup_data = {
3452 .rpc_client = NFS_CLIENT(state->inode),
3453 .rpc_message = &msg,
3454 .callback_ops = &nfs4_lock_ops,
3455 .workqueue = nfsiod_workqueue,
3456 .flags = RPC_TASK_ASYNC,
3460 dprintk("%s: begin!\n", __func__);
3461 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3462 fl->fl_u.nfs4_fl.owner);
3466 data->arg.block = 1;
3468 data->arg.reclaim = 1;
3469 msg.rpc_argp = &data->arg,
3470 msg.rpc_resp = &data->res,
3471 task_setup_data.callback_data = data;
3472 task = rpc_run_task(&task_setup_data);
3474 return PTR_ERR(task);
3475 ret = nfs4_wait_for_completion_rpc_task(task);
3477 ret = data->rpc_status;
3478 if (ret == -NFS4ERR_DENIED)
3481 data->cancelled = 1;
3483 dprintk("%s: done, ret = %d!\n", __func__, ret);
3487 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3489 struct nfs_server *server = NFS_SERVER(state->inode);
3490 struct nfs4_exception exception = { };
3494 /* Cache the lock if possible... */
3495 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3497 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3498 if (err != -NFS4ERR_DELAY)
3500 nfs4_handle_exception(server, err, &exception);
3501 } while (exception.retry);
3505 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3507 struct nfs_server *server = NFS_SERVER(state->inode);
3508 struct nfs4_exception exception = { };
3511 err = nfs4_set_lock_state(state, request);
3515 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3517 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3518 if (err != -NFS4ERR_DELAY)
3520 nfs4_handle_exception(server, err, &exception);
3521 } while (exception.retry);
3525 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3527 struct nfs_inode *nfsi = NFS_I(state->inode);
3528 unsigned char fl_flags = request->fl_flags;
3531 /* Is this a delegated open? */
3532 status = nfs4_set_lock_state(state, request);
3535 request->fl_flags |= FL_ACCESS;
3536 status = do_vfs_lock(request->fl_file, request);
3539 down_read(&nfsi->rwsem);
3540 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3541 /* Yes: cache locks! */
3542 /* ...but avoid races with delegation recall... */
3543 request->fl_flags = fl_flags & ~FL_SLEEP;
3544 status = do_vfs_lock(request->fl_file, request);
3547 status = _nfs4_do_setlk(state, cmd, request, 0);
3550 /* Note: we always want to sleep here! */
3551 request->fl_flags = fl_flags | FL_SLEEP;
3552 if (do_vfs_lock(request->fl_file, request) < 0)
3553 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3555 up_read(&nfsi->rwsem);
3557 request->fl_flags = fl_flags;
3561 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3563 struct nfs4_exception exception = { };
3567 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3568 _nfs4_proc_setlk(state, cmd, request),
3570 } while (exception.retry);
3575 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3577 struct nfs_open_context *ctx;
3578 struct nfs4_state *state;
3579 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3582 /* verify open state */
3583 ctx = nfs_file_open_context(filp);
3586 if (request->fl_start < 0 || request->fl_end < 0)
3590 return nfs4_proc_getlk(state, F_GETLK, request);
3592 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3595 if (request->fl_type == F_UNLCK)
3596 return nfs4_proc_unlck(state, cmd, request);
3599 status = nfs4_proc_setlk(state, cmd, request);
3600 if ((status != -EAGAIN) || IS_SETLK(cmd))
3602 timeout = nfs4_set_lock_task_retry(timeout);
3603 status = -ERESTARTSYS;
3606 } while(status < 0);
3610 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3612 struct nfs_server *server = NFS_SERVER(state->inode);
3613 struct nfs4_exception exception = { };
3616 err = nfs4_set_lock_state(state, fl);
3620 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3621 if (err != -NFS4ERR_DELAY)
3623 err = nfs4_handle_exception(server, err, &exception);
3624 } while (exception.retry);
3629 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3631 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3632 size_t buflen, int flags)
3634 struct inode *inode = dentry->d_inode;
3636 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3639 return nfs4_proc_set_acl(inode, buf, buflen);
3642 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3643 * and that's what we'll do for e.g. user attributes that haven't been set.
3644 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3645 * attributes in kernel-managed attribute namespaces. */
3646 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3649 struct inode *inode = dentry->d_inode;
3651 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3654 return nfs4_proc_get_acl(inode, buf, buflen);
3657 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3659 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3661 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3663 if (buf && buflen < len)
3666 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3670 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3671 struct nfs4_fs_locations *fs_locations, struct page *page)
3673 struct nfs_server *server = NFS_SERVER(dir);
3675 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3676 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3678 struct nfs4_fs_locations_arg args = {
3679 .dir_fh = NFS_FH(dir),
3684 struct rpc_message msg = {
3685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3687 .rpc_resp = fs_locations,
3691 dprintk("%s: start\n", __func__);
3692 nfs_fattr_init(&fs_locations->fattr);
3693 fs_locations->server = server;
3694 fs_locations->nlocations = 0;
3695 status = rpc_call_sync(server->client, &msg, 0);
3696 dprintk("%s: returned status = %d\n", __func__, status);
3700 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3701 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
3702 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
3703 .recover_open = nfs4_open_reclaim,
3704 .recover_lock = nfs4_lock_reclaim,
3707 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3708 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
3709 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
3710 .recover_open = nfs4_open_expired,
3711 .recover_lock = nfs4_lock_expired,
3714 static const struct inode_operations nfs4_file_inode_operations = {
3715 .permission = nfs_permission,
3716 .getattr = nfs_getattr,
3717 .setattr = nfs_setattr,
3718 .getxattr = nfs4_getxattr,
3719 .setxattr = nfs4_setxattr,
3720 .listxattr = nfs4_listxattr,
3723 const struct nfs_rpc_ops nfs_v4_clientops = {
3724 .version = 4, /* protocol version */
3725 .dentry_ops = &nfs4_dentry_operations,
3726 .dir_inode_ops = &nfs4_dir_inode_operations,
3727 .file_inode_ops = &nfs4_file_inode_operations,
3728 .getroot = nfs4_proc_get_root,
3729 .getattr = nfs4_proc_getattr,
3730 .setattr = nfs4_proc_setattr,
3731 .lookupfh = nfs4_proc_lookupfh,
3732 .lookup = nfs4_proc_lookup,
3733 .access = nfs4_proc_access,
3734 .readlink = nfs4_proc_readlink,
3735 .create = nfs4_proc_create,
3736 .remove = nfs4_proc_remove,
3737 .unlink_setup = nfs4_proc_unlink_setup,
3738 .unlink_done = nfs4_proc_unlink_done,
3739 .rename = nfs4_proc_rename,
3740 .link = nfs4_proc_link,
3741 .symlink = nfs4_proc_symlink,
3742 .mkdir = nfs4_proc_mkdir,
3743 .rmdir = nfs4_proc_remove,
3744 .readdir = nfs4_proc_readdir,
3745 .mknod = nfs4_proc_mknod,
3746 .statfs = nfs4_proc_statfs,
3747 .fsinfo = nfs4_proc_fsinfo,
3748 .pathconf = nfs4_proc_pathconf,
3749 .set_capabilities = nfs4_server_capabilities,
3750 .decode_dirent = nfs4_decode_dirent,
3751 .read_setup = nfs4_proc_read_setup,
3752 .read_done = nfs4_read_done,
3753 .write_setup = nfs4_proc_write_setup,
3754 .write_done = nfs4_write_done,
3755 .commit_setup = nfs4_proc_commit_setup,
3756 .commit_done = nfs4_commit_done,
3757 .lock = nfs4_proc_lock,
3758 .clear_acl_cache = nfs4_zap_acl_attr,