4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
202 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
203 nfs_wait_bit_killable, TASK_KILLABLE);
207 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
214 *timeout = NFS4_POLL_RETRY_MIN;
215 if (*timeout > NFS4_POLL_RETRY_MAX)
216 *timeout = NFS4_POLL_RETRY_MAX;
217 schedule_timeout_killable(*timeout);
218 if (fatal_signal_pending(current))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
229 struct nfs_client *clp = server->nfs_client;
230 struct nfs4_state *state = exception->state;
233 exception->retry = 0;
237 case -NFS4ERR_ADMIN_REVOKED:
238 case -NFS4ERR_BAD_STATEID:
239 case -NFS4ERR_OPENMODE:
242 nfs4_state_mark_reclaim_nograce(clp, state);
243 case -NFS4ERR_STALE_CLIENTID:
244 case -NFS4ERR_STALE_STATEID:
245 case -NFS4ERR_EXPIRED:
246 nfs4_schedule_state_recovery(clp);
247 ret = nfs4_wait_clnt_recover(clp);
249 exception->retry = 1;
251 case -NFS4ERR_FILE_OPEN:
254 ret = nfs4_delay(server->client, &exception->timeout);
257 case -NFS4ERR_OLD_STATEID:
258 exception->retry = 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret);
265 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
267 struct nfs_client *clp = server->nfs_client;
268 spin_lock(&clp->cl_lock);
269 if (time_before(clp->cl_last_renewal,timestamp))
270 clp->cl_last_renewal = timestamp;
271 spin_unlock(&clp->cl_lock);
274 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
276 struct nfs_inode *nfsi = NFS_I(dir);
278 spin_lock(&dir->i_lock);
279 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
280 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
281 nfs_force_lookup_revalidate(dir);
282 nfsi->change_attr = cinfo->after;
283 spin_unlock(&dir->i_lock);
286 struct nfs4_opendata {
288 struct nfs_openargs o_arg;
289 struct nfs_openres o_res;
290 struct nfs_open_confirmargs c_arg;
291 struct nfs_open_confirmres c_res;
292 struct nfs_fattr f_attr;
293 struct nfs_fattr dir_attr;
296 struct nfs4_state_owner *owner;
297 struct nfs4_state *state;
299 unsigned long timestamp;
300 unsigned int rpc_done : 1;
306 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
308 p->o_res.f_attr = &p->f_attr;
309 p->o_res.dir_attr = &p->dir_attr;
310 p->o_res.seqid = p->o_arg.seqid;
311 p->c_res.seqid = p->c_arg.seqid;
312 p->o_res.server = p->o_arg.server;
313 nfs_fattr_init(&p->f_attr);
314 nfs_fattr_init(&p->dir_attr);
317 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
318 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
319 const struct iattr *attrs)
321 struct dentry *parent = dget_parent(path->dentry);
322 struct inode *dir = parent->d_inode;
323 struct nfs_server *server = NFS_SERVER(dir);
324 struct nfs4_opendata *p;
326 p = kzalloc(sizeof(*p), GFP_KERNEL);
329 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
330 if (p->o_arg.seqid == NULL)
332 p->path.mnt = mntget(path->mnt);
333 p->path.dentry = dget(path->dentry);
336 atomic_inc(&sp->so_count);
337 p->o_arg.fh = NFS_FH(dir);
338 p->o_arg.open_flags = flags;
339 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
340 p->o_arg.clientid = server->nfs_client->cl_clientid;
341 p->o_arg.id = sp->so_owner_id.id;
342 p->o_arg.name = &p->path.dentry->d_name;
343 p->o_arg.server = server;
344 p->o_arg.bitmask = server->attr_bitmask;
345 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
346 if (flags & O_EXCL) {
347 u32 *s = (u32 *) p->o_arg.u.verifier.data;
350 } else if (flags & O_CREAT) {
351 p->o_arg.u.attrs = &p->attrs;
352 memcpy(&p->attrs, attrs, sizeof(p->attrs));
354 p->c_arg.fh = &p->o_res.fh;
355 p->c_arg.stateid = &p->o_res.stateid;
356 p->c_arg.seqid = p->o_arg.seqid;
357 nfs4_init_opendata_res(p);
367 static void nfs4_opendata_free(struct kref *kref)
369 struct nfs4_opendata *p = container_of(kref,
370 struct nfs4_opendata, kref);
372 nfs_free_seqid(p->o_arg.seqid);
373 if (p->state != NULL)
374 nfs4_put_open_state(p->state);
375 nfs4_put_state_owner(p->owner);
381 static void nfs4_opendata_put(struct nfs4_opendata *p)
384 kref_put(&p->kref, nfs4_opendata_free);
387 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
391 ret = rpc_wait_for_completion_task(task);
395 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
399 if (open_mode & O_EXCL)
401 switch (mode & (FMODE_READ|FMODE_WRITE)) {
403 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
406 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
408 case FMODE_READ|FMODE_WRITE:
409 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
415 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
417 if ((delegation->type & fmode) != fmode)
419 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
421 nfs_mark_delegation_referenced(delegation);
425 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
434 case FMODE_READ|FMODE_WRITE:
437 nfs4_state_set_mode_locked(state, state->state | fmode);
440 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
442 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
443 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
444 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
447 set_bit(NFS_O_RDONLY_STATE, &state->flags);
450 set_bit(NFS_O_WRONLY_STATE, &state->flags);
452 case FMODE_READ|FMODE_WRITE:
453 set_bit(NFS_O_RDWR_STATE, &state->flags);
457 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
459 write_seqlock(&state->seqlock);
460 nfs_set_open_stateid_locked(state, stateid, fmode);
461 write_sequnlock(&state->seqlock);
464 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
467 * Protect the call to nfs4_state_set_mode_locked and
468 * serialise the stateid update
470 write_seqlock(&state->seqlock);
471 if (deleg_stateid != NULL) {
472 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
473 set_bit(NFS_DELEGATED_STATE, &state->flags);
475 if (open_stateid != NULL)
476 nfs_set_open_stateid_locked(state, open_stateid, fmode);
477 write_sequnlock(&state->seqlock);
478 spin_lock(&state->owner->so_lock);
479 update_open_stateflags(state, fmode);
480 spin_unlock(&state->owner->so_lock);
483 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
485 struct nfs_inode *nfsi = NFS_I(state->inode);
486 struct nfs_delegation *deleg_cur;
489 fmode &= (FMODE_READ|FMODE_WRITE);
492 deleg_cur = rcu_dereference(nfsi->delegation);
493 if (deleg_cur == NULL)
496 spin_lock(&deleg_cur->lock);
497 if (nfsi->delegation != deleg_cur ||
498 (deleg_cur->type & fmode) != fmode)
499 goto no_delegation_unlock;
501 if (delegation == NULL)
502 delegation = &deleg_cur->stateid;
503 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
504 goto no_delegation_unlock;
506 nfs_mark_delegation_referenced(deleg_cur);
507 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
509 no_delegation_unlock:
510 spin_unlock(&deleg_cur->lock);
514 if (!ret && open_stateid != NULL) {
515 __update_open_stateid(state, open_stateid, NULL, fmode);
523 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
525 struct nfs_delegation *delegation;
528 delegation = rcu_dereference(NFS_I(inode)->delegation);
529 if (delegation == NULL || (delegation->type & fmode) == fmode) {
534 nfs_inode_return_delegation(inode);
537 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
539 struct nfs4_state *state = opendata->state;
540 struct nfs_inode *nfsi = NFS_I(state->inode);
541 struct nfs_delegation *delegation;
542 int open_mode = opendata->o_arg.open_flags & O_EXCL;
543 fmode_t fmode = opendata->o_arg.fmode;
544 nfs4_stateid stateid;
548 if (can_open_cached(state, fmode, open_mode)) {
549 spin_lock(&state->owner->so_lock);
550 if (can_open_cached(state, fmode, open_mode)) {
551 update_open_stateflags(state, fmode);
552 spin_unlock(&state->owner->so_lock);
553 goto out_return_state;
555 spin_unlock(&state->owner->so_lock);
558 delegation = rcu_dereference(nfsi->delegation);
559 if (delegation == NULL ||
560 !can_open_delegated(delegation, fmode)) {
564 /* Save the delegation */
565 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
567 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
572 /* Try to update the stateid using the delegation */
573 if (update_open_stateid(state, NULL, &stateid, fmode))
574 goto out_return_state;
579 atomic_inc(&state->count);
583 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
586 struct nfs4_state *state = NULL;
587 struct nfs_delegation *delegation;
590 if (!data->rpc_done) {
591 state = nfs4_try_open_cached(data);
596 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
598 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
599 ret = PTR_ERR(inode);
603 state = nfs4_get_open_state(inode, data->owner);
606 if (data->o_res.delegation_type != 0) {
607 int delegation_flags = 0;
610 delegation = rcu_dereference(NFS_I(inode)->delegation);
612 delegation_flags = delegation->flags;
614 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
615 nfs_inode_set_delegation(state->inode,
616 data->owner->so_cred,
619 nfs_inode_reclaim_delegation(state->inode,
620 data->owner->so_cred,
624 update_open_stateid(state, &data->o_res.stateid, NULL,
635 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
637 struct nfs_inode *nfsi = NFS_I(state->inode);
638 struct nfs_open_context *ctx;
640 spin_lock(&state->inode->i_lock);
641 list_for_each_entry(ctx, &nfsi->open_files, list) {
642 if (ctx->state != state)
644 get_nfs_open_context(ctx);
645 spin_unlock(&state->inode->i_lock);
648 spin_unlock(&state->inode->i_lock);
649 return ERR_PTR(-ENOENT);
652 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
654 struct nfs4_opendata *opendata;
656 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
657 if (opendata == NULL)
658 return ERR_PTR(-ENOMEM);
659 opendata->state = state;
660 atomic_inc(&state->count);
664 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
666 struct nfs4_state *newstate;
669 opendata->o_arg.open_flags = 0;
670 opendata->o_arg.fmode = fmode;
671 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
672 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
673 nfs4_init_opendata_res(opendata);
674 ret = _nfs4_proc_open(opendata);
677 newstate = nfs4_opendata_to_nfs4_state(opendata);
678 if (IS_ERR(newstate))
679 return PTR_ERR(newstate);
680 nfs4_close_state(&opendata->path, newstate, fmode);
685 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
687 struct nfs4_state *newstate;
690 /* memory barrier prior to reading state->n_* */
691 clear_bit(NFS_DELEGATED_STATE, &state->flags);
693 if (state->n_rdwr != 0) {
694 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
697 if (newstate != state)
700 if (state->n_wronly != 0) {
701 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
704 if (newstate != state)
707 if (state->n_rdonly != 0) {
708 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
711 if (newstate != state)
715 * We may have performed cached opens for all three recoveries.
716 * Check if we need to update the current stateid.
718 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
719 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
720 write_seqlock(&state->seqlock);
721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
722 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
723 write_sequnlock(&state->seqlock);
730 * reclaim state on the server after a reboot.
732 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
734 struct nfs_delegation *delegation;
735 struct nfs4_opendata *opendata;
736 fmode_t delegation_type = 0;
739 opendata = nfs4_open_recoverdata_alloc(ctx, state);
740 if (IS_ERR(opendata))
741 return PTR_ERR(opendata);
742 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
743 opendata->o_arg.fh = NFS_FH(state->inode);
745 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
746 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
747 delegation_type = delegation->type;
749 opendata->o_arg.u.delegation_type = delegation_type;
750 status = nfs4_open_recover(opendata, state);
751 nfs4_opendata_put(opendata);
755 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
757 struct nfs_server *server = NFS_SERVER(state->inode);
758 struct nfs4_exception exception = { };
761 err = _nfs4_do_open_reclaim(ctx, state);
762 if (err != -NFS4ERR_DELAY)
764 nfs4_handle_exception(server, err, &exception);
765 } while (exception.retry);
769 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
771 struct nfs_open_context *ctx;
774 ctx = nfs4_state_find_open_context(state);
777 ret = nfs4_do_open_reclaim(ctx, state);
778 put_nfs_open_context(ctx);
782 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
784 struct nfs4_opendata *opendata;
787 opendata = nfs4_open_recoverdata_alloc(ctx, state);
788 if (IS_ERR(opendata))
789 return PTR_ERR(opendata);
790 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
791 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
792 sizeof(opendata->o_arg.u.delegation.data));
793 ret = nfs4_open_recover(opendata, state);
794 nfs4_opendata_put(opendata);
798 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
800 struct nfs4_exception exception = { };
801 struct nfs_server *server = NFS_SERVER(state->inode);
804 err = _nfs4_open_delegation_recall(ctx, state, stateid);
810 case -NFS4ERR_STALE_CLIENTID:
811 case -NFS4ERR_STALE_STATEID:
812 case -NFS4ERR_EXPIRED:
813 /* Don't recall a delegation if it was lost */
814 nfs4_schedule_state_recovery(server->nfs_client);
818 * The show must go on: exit, but mark the
819 * stateid as needing recovery.
821 case -NFS4ERR_ADMIN_REVOKED:
822 case -NFS4ERR_BAD_STATEID:
823 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
828 err = nfs4_handle_exception(server, err, &exception);
829 } while (exception.retry);
834 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
836 struct nfs4_opendata *data = calldata;
838 data->rpc_status = task->tk_status;
839 if (RPC_ASSASSINATED(task))
841 if (data->rpc_status == 0) {
842 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
843 sizeof(data->o_res.stateid.data));
844 nfs_confirm_seqid(&data->owner->so_seqid, 0);
845 renew_lease(data->o_res.server, data->timestamp);
850 static void nfs4_open_confirm_release(void *calldata)
852 struct nfs4_opendata *data = calldata;
853 struct nfs4_state *state = NULL;
855 /* If this request hasn't been cancelled, do nothing */
856 if (data->cancelled == 0)
858 /* In case of error, no cleanup! */
861 state = nfs4_opendata_to_nfs4_state(data);
863 nfs4_close_state(&data->path, state, data->o_arg.fmode);
865 nfs4_opendata_put(data);
868 static const struct rpc_call_ops nfs4_open_confirm_ops = {
869 .rpc_call_done = nfs4_open_confirm_done,
870 .rpc_release = nfs4_open_confirm_release,
874 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
876 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
878 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
879 struct rpc_task *task;
880 struct rpc_message msg = {
881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
882 .rpc_argp = &data->c_arg,
883 .rpc_resp = &data->c_res,
884 .rpc_cred = data->owner->so_cred,
886 struct rpc_task_setup task_setup_data = {
887 .rpc_client = server->client,
889 .callback_ops = &nfs4_open_confirm_ops,
890 .callback_data = data,
891 .workqueue = nfsiod_workqueue,
892 .flags = RPC_TASK_ASYNC,
896 kref_get(&data->kref);
898 data->rpc_status = 0;
899 data->timestamp = jiffies;
900 task = rpc_run_task(&task_setup_data);
902 return PTR_ERR(task);
903 status = nfs4_wait_for_completion_rpc_task(task);
908 status = data->rpc_status;
913 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
915 struct nfs4_opendata *data = calldata;
916 struct nfs4_state_owner *sp = data->owner;
918 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
921 * Check if we still need to send an OPEN call, or if we can use
922 * a delegation instead.
924 if (data->state != NULL) {
925 struct nfs_delegation *delegation;
927 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
930 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
931 if (delegation != NULL &&
932 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
938 /* Update sequence id. */
939 data->o_arg.id = sp->so_owner_id.id;
940 data->o_arg.clientid = sp->so_client->cl_clientid;
941 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
942 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
943 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
945 data->timestamp = jiffies;
946 rpc_call_start(task);
949 task->tk_action = NULL;
953 static void nfs4_open_done(struct rpc_task *task, void *calldata)
955 struct nfs4_opendata *data = calldata;
957 data->rpc_status = task->tk_status;
958 if (RPC_ASSASSINATED(task))
960 if (task->tk_status == 0) {
961 switch (data->o_res.f_attr->mode & S_IFMT) {
965 data->rpc_status = -ELOOP;
968 data->rpc_status = -EISDIR;
971 data->rpc_status = -ENOTDIR;
973 renew_lease(data->o_res.server, data->timestamp);
974 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
975 nfs_confirm_seqid(&data->owner->so_seqid, 0);
980 static void nfs4_open_release(void *calldata)
982 struct nfs4_opendata *data = calldata;
983 struct nfs4_state *state = NULL;
985 /* If this request hasn't been cancelled, do nothing */
986 if (data->cancelled == 0)
988 /* In case of error, no cleanup! */
989 if (data->rpc_status != 0 || !data->rpc_done)
991 /* In case we need an open_confirm, no cleanup! */
992 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
994 state = nfs4_opendata_to_nfs4_state(data);
996 nfs4_close_state(&data->path, state, data->o_arg.fmode);
998 nfs4_opendata_put(data);
1001 static const struct rpc_call_ops nfs4_open_ops = {
1002 .rpc_call_prepare = nfs4_open_prepare,
1003 .rpc_call_done = nfs4_open_done,
1004 .rpc_release = nfs4_open_release,
1008 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1010 static int _nfs4_proc_open(struct nfs4_opendata *data)
1012 struct inode *dir = data->dir->d_inode;
1013 struct nfs_server *server = NFS_SERVER(dir);
1014 struct nfs_openargs *o_arg = &data->o_arg;
1015 struct nfs_openres *o_res = &data->o_res;
1016 struct rpc_task *task;
1017 struct rpc_message msg = {
1018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1021 .rpc_cred = data->owner->so_cred,
1023 struct rpc_task_setup task_setup_data = {
1024 .rpc_client = server->client,
1025 .rpc_message = &msg,
1026 .callback_ops = &nfs4_open_ops,
1027 .callback_data = data,
1028 .workqueue = nfsiod_workqueue,
1029 .flags = RPC_TASK_ASYNC,
1033 kref_get(&data->kref);
1035 data->rpc_status = 0;
1036 data->cancelled = 0;
1037 task = rpc_run_task(&task_setup_data);
1039 return PTR_ERR(task);
1040 status = nfs4_wait_for_completion_rpc_task(task);
1042 data->cancelled = 1;
1045 status = data->rpc_status;
1047 if (status != 0 || !data->rpc_done)
1050 if (o_res->fh.size == 0)
1051 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1053 if (o_arg->open_flags & O_CREAT) {
1054 update_changeattr(dir, &o_res->cinfo);
1055 nfs_post_op_update_inode(dir, o_res->dir_attr);
1057 nfs_refresh_inode(dir, o_res->dir_attr);
1058 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1059 status = _nfs4_proc_open_confirm(data);
1063 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1064 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1068 static int nfs4_recover_expired_lease(struct nfs_server *server)
1070 struct nfs_client *clp = server->nfs_client;
1074 ret = nfs4_wait_clnt_recover(clp);
1077 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1078 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1080 nfs4_schedule_state_recovery(clp);
1087 * reclaim state on the server after a network partition.
1088 * Assumes caller holds the appropriate lock
1090 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1092 struct nfs4_opendata *opendata;
1095 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1096 if (IS_ERR(opendata))
1097 return PTR_ERR(opendata);
1098 ret = nfs4_open_recover(opendata, state);
1100 d_drop(ctx->path.dentry);
1101 nfs4_opendata_put(opendata);
1105 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1107 struct nfs_server *server = NFS_SERVER(state->inode);
1108 struct nfs4_exception exception = { };
1112 err = _nfs4_open_expired(ctx, state);
1113 if (err != -NFS4ERR_DELAY)
1115 nfs4_handle_exception(server, err, &exception);
1116 } while (exception.retry);
1120 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1122 struct nfs_open_context *ctx;
1125 ctx = nfs4_state_find_open_context(state);
1127 return PTR_ERR(ctx);
1128 ret = nfs4_do_open_expired(ctx, state);
1129 put_nfs_open_context(ctx);
1134 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1135 * fields corresponding to attributes that were used to store the verifier.
1136 * Make sure we clobber those fields in the later setattr call
1138 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1140 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1141 !(sattr->ia_valid & ATTR_ATIME_SET))
1142 sattr->ia_valid |= ATTR_ATIME;
1144 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1145 !(sattr->ia_valid & ATTR_MTIME_SET))
1146 sattr->ia_valid |= ATTR_MTIME;
1150 * Returns a referenced nfs4_state
1152 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1154 struct nfs4_state_owner *sp;
1155 struct nfs4_state *state = NULL;
1156 struct nfs_server *server = NFS_SERVER(dir);
1157 struct nfs4_opendata *opendata;
1160 /* Protect against reboot recovery conflicts */
1162 if (!(sp = nfs4_get_state_owner(server, cred))) {
1163 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1166 status = nfs4_recover_expired_lease(server);
1168 goto err_put_state_owner;
1169 if (path->dentry->d_inode != NULL)
1170 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1172 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1173 if (opendata == NULL)
1174 goto err_put_state_owner;
1176 if (path->dentry->d_inode != NULL)
1177 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1179 status = _nfs4_proc_open(opendata);
1181 goto err_opendata_put;
1183 if (opendata->o_arg.open_flags & O_EXCL)
1184 nfs4_exclusive_attrset(opendata, sattr);
1186 state = nfs4_opendata_to_nfs4_state(opendata);
1187 status = PTR_ERR(state);
1189 goto err_opendata_put;
1190 nfs4_opendata_put(opendata);
1191 nfs4_put_state_owner(sp);
1195 nfs4_opendata_put(opendata);
1196 err_put_state_owner:
1197 nfs4_put_state_owner(sp);
1204 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1206 struct nfs4_exception exception = { };
1207 struct nfs4_state *res;
1211 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1214 /* NOTE: BAD_SEQID means the server and client disagree about the
1215 * book-keeping w.r.t. state-changing operations
1216 * (OPEN/CLOSE/LOCK/LOCKU...)
1217 * It is actually a sign of a bug on the client or on the server.
1219 * If we receive a BAD_SEQID error in the particular case of
1220 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1221 * have unhashed the old state_owner for us, and that we can
1222 * therefore safely retry using a new one. We should still warn
1223 * the user though...
1225 if (status == -NFS4ERR_BAD_SEQID) {
1226 printk(KERN_WARNING "NFS: v4 server %s "
1227 " returned a bad sequence-id error!\n",
1228 NFS_SERVER(dir)->nfs_client->cl_hostname);
1229 exception.retry = 1;
1233 * BAD_STATEID on OPEN means that the server cancelled our
1234 * state before it received the OPEN_CONFIRM.
1235 * Recover by retrying the request as per the discussion
1236 * on Page 181 of RFC3530.
1238 if (status == -NFS4ERR_BAD_STATEID) {
1239 exception.retry = 1;
1242 if (status == -EAGAIN) {
1243 /* We must have found a delegation */
1244 exception.retry = 1;
1247 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1248 status, &exception));
1249 } while (exception.retry);
1253 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1254 struct nfs_fattr *fattr, struct iattr *sattr,
1255 struct nfs4_state *state)
1257 struct nfs_server *server = NFS_SERVER(inode);
1258 struct nfs_setattrargs arg = {
1259 .fh = NFS_FH(inode),
1262 .bitmask = server->attr_bitmask,
1264 struct nfs_setattrres res = {
1268 struct rpc_message msg = {
1269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1274 unsigned long timestamp = jiffies;
1277 nfs_fattr_init(fattr);
1279 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1280 /* Use that stateid */
1281 } else if (state != NULL) {
1282 nfs4_copy_stateid(&arg.stateid, state, current->files);
1284 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1286 status = rpc_call_sync(server->client, &msg, 0);
1287 if (status == 0 && state != NULL)
1288 renew_lease(server, timestamp);
1292 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1293 struct nfs_fattr *fattr, struct iattr *sattr,
1294 struct nfs4_state *state)
1296 struct nfs_server *server = NFS_SERVER(inode);
1297 struct nfs4_exception exception = { };
1300 err = nfs4_handle_exception(server,
1301 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1303 } while (exception.retry);
1307 struct nfs4_closedata {
1309 struct inode *inode;
1310 struct nfs4_state *state;
1311 struct nfs_closeargs arg;
1312 struct nfs_closeres res;
1313 struct nfs_fattr fattr;
1314 unsigned long timestamp;
1317 static void nfs4_free_closedata(void *data)
1319 struct nfs4_closedata *calldata = data;
1320 struct nfs4_state_owner *sp = calldata->state->owner;
1322 nfs4_put_open_state(calldata->state);
1323 nfs_free_seqid(calldata->arg.seqid);
1324 nfs4_put_state_owner(sp);
1325 path_put(&calldata->path);
1329 static void nfs4_close_done(struct rpc_task *task, void *data)
1331 struct nfs4_closedata *calldata = data;
1332 struct nfs4_state *state = calldata->state;
1333 struct nfs_server *server = NFS_SERVER(calldata->inode);
1335 if (RPC_ASSASSINATED(task))
1337 /* hmm. we are done with the inode, and in the process of freeing
1338 * the state_owner. we keep this around to process errors
1340 switch (task->tk_status) {
1342 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1343 renew_lease(server, calldata->timestamp);
1345 case -NFS4ERR_STALE_STATEID:
1346 case -NFS4ERR_OLD_STATEID:
1347 case -NFS4ERR_BAD_STATEID:
1348 case -NFS4ERR_EXPIRED:
1349 if (calldata->arg.fmode == 0)
1352 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1353 rpc_restart_call(task);
1357 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1360 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1362 struct nfs4_closedata *calldata = data;
1363 struct nfs4_state *state = calldata->state;
1364 int clear_rd, clear_wr, clear_rdwr;
1366 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1369 clear_rd = clear_wr = clear_rdwr = 0;
1370 spin_lock(&state->owner->so_lock);
1371 /* Calculate the change in open mode */
1372 if (state->n_rdwr == 0) {
1373 if (state->n_rdonly == 0) {
1374 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1375 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1377 if (state->n_wronly == 0) {
1378 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1379 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1382 spin_unlock(&state->owner->so_lock);
1383 if (!clear_rd && !clear_wr && !clear_rdwr) {
1384 /* Note: exit _without_ calling nfs4_close_done */
1385 task->tk_action = NULL;
1388 nfs_fattr_init(calldata->res.fattr);
1389 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1390 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1391 calldata->arg.fmode = FMODE_READ;
1392 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1393 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1394 calldata->arg.fmode = FMODE_WRITE;
1396 calldata->timestamp = jiffies;
1397 rpc_call_start(task);
1400 static const struct rpc_call_ops nfs4_close_ops = {
1401 .rpc_call_prepare = nfs4_close_prepare,
1402 .rpc_call_done = nfs4_close_done,
1403 .rpc_release = nfs4_free_closedata,
1407 * It is possible for data to be read/written from a mem-mapped file
1408 * after the sys_close call (which hits the vfs layer as a flush).
1409 * This means that we can't safely call nfsv4 close on a file until
1410 * the inode is cleared. This in turn means that we are not good
1411 * NFSv4 citizens - we do not indicate to the server to update the file's
1412 * share state even when we are done with one of the three share
1413 * stateid's in the inode.
1415 * NOTE: Caller must be holding the sp->so_owner semaphore!
1417 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1419 struct nfs_server *server = NFS_SERVER(state->inode);
1420 struct nfs4_closedata *calldata;
1421 struct nfs4_state_owner *sp = state->owner;
1422 struct rpc_task *task;
1423 struct rpc_message msg = {
1424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1425 .rpc_cred = state->owner->so_cred,
1427 struct rpc_task_setup task_setup_data = {
1428 .rpc_client = server->client,
1429 .rpc_message = &msg,
1430 .callback_ops = &nfs4_close_ops,
1431 .workqueue = nfsiod_workqueue,
1432 .flags = RPC_TASK_ASYNC,
1434 int status = -ENOMEM;
1436 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1437 if (calldata == NULL)
1439 calldata->inode = state->inode;
1440 calldata->state = state;
1441 calldata->arg.fh = NFS_FH(state->inode);
1442 calldata->arg.stateid = &state->open_stateid;
1443 /* Serialization for the sequence id */
1444 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1445 if (calldata->arg.seqid == NULL)
1446 goto out_free_calldata;
1447 calldata->arg.fmode = 0;
1448 calldata->arg.bitmask = server->cache_consistency_bitmask;
1449 calldata->res.fattr = &calldata->fattr;
1450 calldata->res.seqid = calldata->arg.seqid;
1451 calldata->res.server = server;
1452 calldata->path.mnt = mntget(path->mnt);
1453 calldata->path.dentry = dget(path->dentry);
1455 msg.rpc_argp = &calldata->arg,
1456 msg.rpc_resp = &calldata->res,
1457 task_setup_data.callback_data = calldata;
1458 task = rpc_run_task(&task_setup_data);
1460 return PTR_ERR(task);
1463 status = rpc_wait_for_completion_task(task);
1469 nfs4_put_open_state(state);
1470 nfs4_put_state_owner(sp);
1474 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1479 /* If the open_intent is for execute, we have an extra check to make */
1480 if (fmode & FMODE_EXEC) {
1481 ret = nfs_may_open(state->inode,
1482 state->owner->so_cred,
1483 nd->intent.open.flags);
1487 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1488 if (!IS_ERR(filp)) {
1489 struct nfs_open_context *ctx;
1490 ctx = nfs_file_open_context(filp);
1494 ret = PTR_ERR(filp);
1496 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1501 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1503 struct path path = {
1504 .mnt = nd->path.mnt,
1507 struct dentry *parent;
1509 struct rpc_cred *cred;
1510 struct nfs4_state *state;
1512 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1514 if (nd->flags & LOOKUP_CREATE) {
1515 attr.ia_mode = nd->intent.open.create_mode;
1516 attr.ia_valid = ATTR_MODE;
1517 if (!IS_POSIXACL(dir))
1518 attr.ia_mode &= ~current_umask();
1521 BUG_ON(nd->intent.open.flags & O_CREAT);
1524 cred = rpc_lookup_cred();
1526 return (struct dentry *)cred;
1527 parent = dentry->d_parent;
1528 /* Protect against concurrent sillydeletes */
1529 nfs_block_sillyrename(parent);
1530 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1532 if (IS_ERR(state)) {
1533 if (PTR_ERR(state) == -ENOENT) {
1534 d_add(dentry, NULL);
1535 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1537 nfs_unblock_sillyrename(parent);
1538 return (struct dentry *)state;
1540 res = d_add_unique(dentry, igrab(state->inode));
1543 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1544 nfs_unblock_sillyrename(parent);
1545 nfs4_intent_set_file(nd, &path, state, fmode);
1550 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1552 struct path path = {
1553 .mnt = nd->path.mnt,
1556 struct rpc_cred *cred;
1557 struct nfs4_state *state;
1558 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1560 cred = rpc_lookup_cred();
1562 return PTR_ERR(cred);
1563 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1565 if (IS_ERR(state)) {
1566 switch (PTR_ERR(state)) {
1572 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1578 if (state->inode == dentry->d_inode) {
1579 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1580 nfs4_intent_set_file(nd, &path, state, fmode);
1583 nfs4_close_sync(&path, state, fmode);
1589 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1591 if (ctx->state == NULL)
1594 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1596 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1599 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1601 struct nfs4_server_caps_res res = {};
1602 struct rpc_message msg = {
1603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1604 .rpc_argp = fhandle,
1609 status = rpc_call_sync(server->client, &msg, 0);
1611 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1612 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1613 server->caps |= NFS_CAP_ACLS;
1614 if (res.has_links != 0)
1615 server->caps |= NFS_CAP_HARDLINKS;
1616 if (res.has_symlinks != 0)
1617 server->caps |= NFS_CAP_SYMLINKS;
1618 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1619 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1620 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1621 server->acl_bitmask = res.acl_bitmask;
1626 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1628 struct nfs4_exception exception = { };
1631 err = nfs4_handle_exception(server,
1632 _nfs4_server_capabilities(server, fhandle),
1634 } while (exception.retry);
1638 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1639 struct nfs_fsinfo *info)
1641 struct nfs4_lookup_root_arg args = {
1642 .bitmask = nfs4_fattr_bitmap,
1644 struct nfs4_lookup_res res = {
1646 .fattr = info->fattr,
1649 struct rpc_message msg = {
1650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1654 nfs_fattr_init(info->fattr);
1655 return rpc_call_sync(server->client, &msg, 0);
1658 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1659 struct nfs_fsinfo *info)
1661 struct nfs4_exception exception = { };
1664 err = nfs4_handle_exception(server,
1665 _nfs4_lookup_root(server, fhandle, info),
1667 } while (exception.retry);
1672 * get the file handle for the "/" directory on the server
1674 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1675 struct nfs_fsinfo *info)
1679 status = nfs4_lookup_root(server, fhandle, info);
1681 status = nfs4_server_capabilities(server, fhandle);
1683 status = nfs4_do_fsinfo(server, fhandle, info);
1684 return nfs4_map_errors(status);
1688 * Get locations and (maybe) other attributes of a referral.
1689 * Note that we'll actually follow the referral later when
1690 * we detect fsid mismatch in inode revalidation
1692 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1694 int status = -ENOMEM;
1695 struct page *page = NULL;
1696 struct nfs4_fs_locations *locations = NULL;
1698 page = alloc_page(GFP_KERNEL);
1701 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1702 if (locations == NULL)
1705 status = nfs4_proc_fs_locations(dir, name, locations, page);
1708 /* Make sure server returned a different fsid for the referral */
1709 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1710 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1715 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1716 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1718 fattr->mode = S_IFDIR;
1719 memset(fhandle, 0, sizeof(struct nfs_fh));
1728 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1730 struct nfs4_getattr_arg args = {
1732 .bitmask = server->attr_bitmask,
1734 struct nfs4_getattr_res res = {
1738 struct rpc_message msg = {
1739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1744 nfs_fattr_init(fattr);
1745 return rpc_call_sync(server->client, &msg, 0);
1748 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1750 struct nfs4_exception exception = { };
1753 err = nfs4_handle_exception(server,
1754 _nfs4_proc_getattr(server, fhandle, fattr),
1756 } while (exception.retry);
1761 * The file is not closed if it is opened due to the a request to change
1762 * the size of the file. The open call will not be needed once the
1763 * VFS layer lookup-intents are implemented.
1765 * Close is called when the inode is destroyed.
1766 * If we haven't opened the file for O_WRONLY, we
1767 * need to in the size_change case to obtain a stateid.
1770 * Because OPEN is always done by name in nfsv4, it is
1771 * possible that we opened a different file by the same
1772 * name. We can recognize this race condition, but we
1773 * can't do anything about it besides returning an error.
1775 * This will be fixed with VFS changes (lookup-intent).
1778 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1779 struct iattr *sattr)
1781 struct inode *inode = dentry->d_inode;
1782 struct rpc_cred *cred = NULL;
1783 struct nfs4_state *state = NULL;
1786 nfs_fattr_init(fattr);
1788 /* Search for an existing open(O_WRITE) file */
1789 if (sattr->ia_valid & ATTR_FILE) {
1790 struct nfs_open_context *ctx;
1792 ctx = nfs_file_open_context(sattr->ia_file);
1799 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1801 nfs_setattr_update_inode(inode, sattr);
1805 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1806 const struct qstr *name, struct nfs_fh *fhandle,
1807 struct nfs_fattr *fattr)
1810 struct nfs4_lookup_arg args = {
1811 .bitmask = server->attr_bitmask,
1815 struct nfs4_lookup_res res = {
1820 struct rpc_message msg = {
1821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1826 nfs_fattr_init(fattr);
1828 dprintk("NFS call lookupfh %s\n", name->name);
1829 status = rpc_call_sync(server->client, &msg, 0);
1830 dprintk("NFS reply lookupfh: %d\n", status);
1834 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1835 struct qstr *name, struct nfs_fh *fhandle,
1836 struct nfs_fattr *fattr)
1838 struct nfs4_exception exception = { };
1841 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1843 if (err == -NFS4ERR_MOVED) {
1847 err = nfs4_handle_exception(server, err, &exception);
1848 } while (exception.retry);
1852 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1853 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1857 dprintk("NFS call lookup %s\n", name->name);
1858 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1859 if (status == -NFS4ERR_MOVED)
1860 status = nfs4_get_referral(dir, name, fattr, fhandle);
1861 dprintk("NFS reply lookup: %d\n", status);
1865 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1867 struct nfs4_exception exception = { };
1870 err = nfs4_handle_exception(NFS_SERVER(dir),
1871 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1873 } while (exception.retry);
1877 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1879 struct nfs_server *server = NFS_SERVER(inode);
1880 struct nfs_fattr fattr;
1881 struct nfs4_accessargs args = {
1882 .fh = NFS_FH(inode),
1883 .bitmask = server->attr_bitmask,
1885 struct nfs4_accessres res = {
1889 struct rpc_message msg = {
1890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1893 .rpc_cred = entry->cred,
1895 int mode = entry->mask;
1899 * Determine which access bits we want to ask for...
1901 if (mode & MAY_READ)
1902 args.access |= NFS4_ACCESS_READ;
1903 if (S_ISDIR(inode->i_mode)) {
1904 if (mode & MAY_WRITE)
1905 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1906 if (mode & MAY_EXEC)
1907 args.access |= NFS4_ACCESS_LOOKUP;
1909 if (mode & MAY_WRITE)
1910 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1911 if (mode & MAY_EXEC)
1912 args.access |= NFS4_ACCESS_EXECUTE;
1914 nfs_fattr_init(&fattr);
1915 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1918 if (res.access & NFS4_ACCESS_READ)
1919 entry->mask |= MAY_READ;
1920 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1921 entry->mask |= MAY_WRITE;
1922 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1923 entry->mask |= MAY_EXEC;
1924 nfs_refresh_inode(inode, &fattr);
1929 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1931 struct nfs4_exception exception = { };
1934 err = nfs4_handle_exception(NFS_SERVER(inode),
1935 _nfs4_proc_access(inode, entry),
1937 } while (exception.retry);
1942 * TODO: For the time being, we don't try to get any attributes
1943 * along with any of the zero-copy operations READ, READDIR,
1946 * In the case of the first three, we want to put the GETATTR
1947 * after the read-type operation -- this is because it is hard
1948 * to predict the length of a GETATTR response in v4, and thus
1949 * align the READ data correctly. This means that the GETATTR
1950 * may end up partially falling into the page cache, and we should
1951 * shift it into the 'tail' of the xdr_buf before processing.
1952 * To do this efficiently, we need to know the total length
1953 * of data received, which doesn't seem to be available outside
1956 * In the case of WRITE, we also want to put the GETATTR after
1957 * the operation -- in this case because we want to make sure
1958 * we get the post-operation mtime and size. This means that
1959 * we can't use xdr_encode_pages() as written: we need a variant
1960 * of it which would leave room in the 'tail' iovec.
1962 * Both of these changes to the XDR layer would in fact be quite
1963 * minor, but I decided to leave them for a subsequent patch.
1965 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1966 unsigned int pgbase, unsigned int pglen)
1968 struct nfs4_readlink args = {
1969 .fh = NFS_FH(inode),
1974 struct rpc_message msg = {
1975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1980 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1983 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1984 unsigned int pgbase, unsigned int pglen)
1986 struct nfs4_exception exception = { };
1989 err = nfs4_handle_exception(NFS_SERVER(inode),
1990 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1992 } while (exception.retry);
1998 * We will need to arrange for the VFS layer to provide an atomic open.
1999 * Until then, this create/open method is prone to inefficiency and race
2000 * conditions due to the lookup, create, and open VFS calls from sys_open()
2001 * placed on the wire.
2003 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2004 * The file will be opened again in the subsequent VFS open call
2005 * (nfs4_proc_file_open).
2007 * The open for read will just hang around to be used by any process that
2008 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2012 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2013 int flags, struct nameidata *nd)
2015 struct path path = {
2016 .mnt = nd->path.mnt,
2019 struct nfs4_state *state;
2020 struct rpc_cred *cred;
2021 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2024 cred = rpc_lookup_cred();
2026 status = PTR_ERR(cred);
2029 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2031 if (IS_ERR(state)) {
2032 status = PTR_ERR(state);
2035 d_add(dentry, igrab(state->inode));
2036 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2037 if (flags & O_EXCL) {
2038 struct nfs_fattr fattr;
2039 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2041 nfs_setattr_update_inode(state->inode, sattr);
2042 nfs_post_op_update_inode(state->inode, &fattr);
2044 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2045 status = nfs4_intent_set_file(nd, &path, state, fmode);
2047 nfs4_close_sync(&path, state, fmode);
2054 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2056 struct nfs_server *server = NFS_SERVER(dir);
2057 struct nfs_removeargs args = {
2059 .name.len = name->len,
2060 .name.name = name->name,
2061 .bitmask = server->attr_bitmask,
2063 struct nfs_removeres res = {
2066 struct rpc_message msg = {
2067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2073 nfs_fattr_init(&res.dir_attr);
2074 status = rpc_call_sync(server->client, &msg, 0);
2076 update_changeattr(dir, &res.cinfo);
2077 nfs_post_op_update_inode(dir, &res.dir_attr);
2082 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2084 struct nfs4_exception exception = { };
2087 err = nfs4_handle_exception(NFS_SERVER(dir),
2088 _nfs4_proc_remove(dir, name),
2090 } while (exception.retry);
2094 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2096 struct nfs_server *server = NFS_SERVER(dir);
2097 struct nfs_removeargs *args = msg->rpc_argp;
2098 struct nfs_removeres *res = msg->rpc_resp;
2100 args->bitmask = server->cache_consistency_bitmask;
2101 res->server = server;
2102 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2105 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2107 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2109 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2111 update_changeattr(dir, &res->cinfo);
2112 nfs_post_op_update_inode(dir, &res->dir_attr);
2116 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2117 struct inode *new_dir, struct qstr *new_name)
2119 struct nfs_server *server = NFS_SERVER(old_dir);
2120 struct nfs4_rename_arg arg = {
2121 .old_dir = NFS_FH(old_dir),
2122 .new_dir = NFS_FH(new_dir),
2123 .old_name = old_name,
2124 .new_name = new_name,
2125 .bitmask = server->attr_bitmask,
2127 struct nfs_fattr old_fattr, new_fattr;
2128 struct nfs4_rename_res res = {
2130 .old_fattr = &old_fattr,
2131 .new_fattr = &new_fattr,
2133 struct rpc_message msg = {
2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2140 nfs_fattr_init(res.old_fattr);
2141 nfs_fattr_init(res.new_fattr);
2142 status = rpc_call_sync(server->client, &msg, 0);
2145 update_changeattr(old_dir, &res.old_cinfo);
2146 nfs_post_op_update_inode(old_dir, res.old_fattr);
2147 update_changeattr(new_dir, &res.new_cinfo);
2148 nfs_post_op_update_inode(new_dir, res.new_fattr);
2153 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2154 struct inode *new_dir, struct qstr *new_name)
2156 struct nfs4_exception exception = { };
2159 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2160 _nfs4_proc_rename(old_dir, old_name,
2163 } while (exception.retry);
2167 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2169 struct nfs_server *server = NFS_SERVER(inode);
2170 struct nfs4_link_arg arg = {
2171 .fh = NFS_FH(inode),
2172 .dir_fh = NFS_FH(dir),
2174 .bitmask = server->attr_bitmask,
2176 struct nfs_fattr fattr, dir_attr;
2177 struct nfs4_link_res res = {
2180 .dir_attr = &dir_attr,
2182 struct rpc_message msg = {
2183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2189 nfs_fattr_init(res.fattr);
2190 nfs_fattr_init(res.dir_attr);
2191 status = rpc_call_sync(server->client, &msg, 0);
2193 update_changeattr(dir, &res.cinfo);
2194 nfs_post_op_update_inode(dir, res.dir_attr);
2195 nfs_post_op_update_inode(inode, res.fattr);
2201 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2203 struct nfs4_exception exception = { };
2206 err = nfs4_handle_exception(NFS_SERVER(inode),
2207 _nfs4_proc_link(inode, dir, name),
2209 } while (exception.retry);
2213 struct nfs4_createdata {
2214 struct rpc_message msg;
2215 struct nfs4_create_arg arg;
2216 struct nfs4_create_res res;
2218 struct nfs_fattr fattr;
2219 struct nfs_fattr dir_fattr;
2222 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2223 struct qstr *name, struct iattr *sattr, u32 ftype)
2225 struct nfs4_createdata *data;
2227 data = kzalloc(sizeof(*data), GFP_KERNEL);
2229 struct nfs_server *server = NFS_SERVER(dir);
2231 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2232 data->msg.rpc_argp = &data->arg;
2233 data->msg.rpc_resp = &data->res;
2234 data->arg.dir_fh = NFS_FH(dir);
2235 data->arg.server = server;
2236 data->arg.name = name;
2237 data->arg.attrs = sattr;
2238 data->arg.ftype = ftype;
2239 data->arg.bitmask = server->attr_bitmask;
2240 data->res.server = server;
2241 data->res.fh = &data->fh;
2242 data->res.fattr = &data->fattr;
2243 data->res.dir_fattr = &data->dir_fattr;
2244 nfs_fattr_init(data->res.fattr);
2245 nfs_fattr_init(data->res.dir_fattr);
2250 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2252 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2254 update_changeattr(dir, &data->res.dir_cinfo);
2255 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2256 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2261 static void nfs4_free_createdata(struct nfs4_createdata *data)
2266 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2267 struct page *page, unsigned int len, struct iattr *sattr)
2269 struct nfs4_createdata *data;
2270 int status = -ENAMETOOLONG;
2272 if (len > NFS4_MAXPATHLEN)
2276 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2280 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2281 data->arg.u.symlink.pages = &page;
2282 data->arg.u.symlink.len = len;
2284 status = nfs4_do_create(dir, dentry, data);
2286 nfs4_free_createdata(data);
2291 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2292 struct page *page, unsigned int len, struct iattr *sattr)
2294 struct nfs4_exception exception = { };
2297 err = nfs4_handle_exception(NFS_SERVER(dir),
2298 _nfs4_proc_symlink(dir, dentry, page,
2301 } while (exception.retry);
2305 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2306 struct iattr *sattr)
2308 struct nfs4_createdata *data;
2309 int status = -ENOMEM;
2311 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2315 status = nfs4_do_create(dir, dentry, data);
2317 nfs4_free_createdata(data);
2322 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2323 struct iattr *sattr)
2325 struct nfs4_exception exception = { };
2328 err = nfs4_handle_exception(NFS_SERVER(dir),
2329 _nfs4_proc_mkdir(dir, dentry, sattr),
2331 } while (exception.retry);
2335 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2336 u64 cookie, struct page *page, unsigned int count, int plus)
2338 struct inode *dir = dentry->d_inode;
2339 struct nfs4_readdir_arg args = {
2344 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2346 struct nfs4_readdir_res res;
2347 struct rpc_message msg = {
2348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2355 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2356 dentry->d_parent->d_name.name,
2357 dentry->d_name.name,
2358 (unsigned long long)cookie);
2359 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2360 res.pgbase = args.pgbase;
2361 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2363 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2365 nfs_invalidate_atime(dir);
2367 dprintk("%s: returns %d\n", __func__, status);
2371 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2372 u64 cookie, struct page *page, unsigned int count, int plus)
2374 struct nfs4_exception exception = { };
2377 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2378 _nfs4_proc_readdir(dentry, cred, cookie,
2381 } while (exception.retry);
2385 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2386 struct iattr *sattr, dev_t rdev)
2388 struct nfs4_createdata *data;
2389 int mode = sattr->ia_mode;
2390 int status = -ENOMEM;
2392 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2393 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2395 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2400 data->arg.ftype = NF4FIFO;
2401 else if (S_ISBLK(mode)) {
2402 data->arg.ftype = NF4BLK;
2403 data->arg.u.device.specdata1 = MAJOR(rdev);
2404 data->arg.u.device.specdata2 = MINOR(rdev);
2406 else if (S_ISCHR(mode)) {
2407 data->arg.ftype = NF4CHR;
2408 data->arg.u.device.specdata1 = MAJOR(rdev);
2409 data->arg.u.device.specdata2 = MINOR(rdev);
2412 status = nfs4_do_create(dir, dentry, data);
2414 nfs4_free_createdata(data);
2419 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2420 struct iattr *sattr, dev_t rdev)
2422 struct nfs4_exception exception = { };
2425 err = nfs4_handle_exception(NFS_SERVER(dir),
2426 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2428 } while (exception.retry);
2432 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2433 struct nfs_fsstat *fsstat)
2435 struct nfs4_statfs_arg args = {
2437 .bitmask = server->attr_bitmask,
2439 struct rpc_message msg = {
2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2445 nfs_fattr_init(fsstat->fattr);
2446 return rpc_call_sync(server->client, &msg, 0);
2449 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2451 struct nfs4_exception exception = { };
2454 err = nfs4_handle_exception(server,
2455 _nfs4_proc_statfs(server, fhandle, fsstat),
2457 } while (exception.retry);
2461 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2462 struct nfs_fsinfo *fsinfo)
2464 struct nfs4_fsinfo_arg args = {
2466 .bitmask = server->attr_bitmask,
2468 struct rpc_message msg = {
2469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2474 return rpc_call_sync(server->client, &msg, 0);
2477 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2479 struct nfs4_exception exception = { };
2483 err = nfs4_handle_exception(server,
2484 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2486 } while (exception.retry);
2490 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2492 nfs_fattr_init(fsinfo->fattr);
2493 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2496 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2497 struct nfs_pathconf *pathconf)
2499 struct nfs4_pathconf_arg args = {
2501 .bitmask = server->attr_bitmask,
2503 struct rpc_message msg = {
2504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2506 .rpc_resp = pathconf,
2509 /* None of the pathconf attributes are mandatory to implement */
2510 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2511 memset(pathconf, 0, sizeof(*pathconf));
2515 nfs_fattr_init(pathconf->fattr);
2516 return rpc_call_sync(server->client, &msg, 0);
2519 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2520 struct nfs_pathconf *pathconf)
2522 struct nfs4_exception exception = { };
2526 err = nfs4_handle_exception(server,
2527 _nfs4_proc_pathconf(server, fhandle, pathconf),
2529 } while (exception.retry);
2533 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2535 struct nfs_server *server = NFS_SERVER(data->inode);
2537 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2538 rpc_restart_call(task);
2542 nfs_invalidate_atime(data->inode);
2543 if (task->tk_status > 0)
2544 renew_lease(server, data->timestamp);
2548 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2550 data->timestamp = jiffies;
2551 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2554 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2556 struct inode *inode = data->inode;
2558 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2559 rpc_restart_call(task);
2562 if (task->tk_status >= 0) {
2563 renew_lease(NFS_SERVER(inode), data->timestamp);
2564 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2569 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2571 struct nfs_server *server = NFS_SERVER(data->inode);
2573 data->args.bitmask = server->cache_consistency_bitmask;
2574 data->res.server = server;
2575 data->timestamp = jiffies;
2577 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2580 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2582 struct inode *inode = data->inode;
2584 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2585 rpc_restart_call(task);
2588 nfs_refresh_inode(inode, data->res.fattr);
2592 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2594 struct nfs_server *server = NFS_SERVER(data->inode);
2596 data->args.bitmask = server->cache_consistency_bitmask;
2597 data->res.server = server;
2598 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2602 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2603 * standalone procedure for queueing an asynchronous RENEW.
2605 static void nfs4_renew_done(struct rpc_task *task, void *data)
2607 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2608 unsigned long timestamp = (unsigned long)data;
2610 if (task->tk_status < 0) {
2611 /* Unless we're shutting down, schedule state recovery! */
2612 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
2613 nfs4_schedule_state_recovery(clp);
2616 spin_lock(&clp->cl_lock);
2617 if (time_before(clp->cl_last_renewal,timestamp))
2618 clp->cl_last_renewal = timestamp;
2619 spin_unlock(&clp->cl_lock);
2622 static const struct rpc_call_ops nfs4_renew_ops = {
2623 .rpc_call_done = nfs4_renew_done,
2626 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2628 struct rpc_message msg = {
2629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2634 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2635 &nfs4_renew_ops, (void *)jiffies);
2638 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2640 struct rpc_message msg = {
2641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2645 unsigned long now = jiffies;
2648 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2651 spin_lock(&clp->cl_lock);
2652 if (time_before(clp->cl_last_renewal,now))
2653 clp->cl_last_renewal = now;
2654 spin_unlock(&clp->cl_lock);
2658 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2660 return (server->caps & NFS_CAP_ACLS)
2661 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2662 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2665 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2666 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2669 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2671 static void buf_to_pages(const void *buf, size_t buflen,
2672 struct page **pages, unsigned int *pgbase)
2674 const void *p = buf;
2676 *pgbase = offset_in_page(buf);
2678 while (p < buf + buflen) {
2679 *(pages++) = virt_to_page(p);
2680 p += PAGE_CACHE_SIZE;
2684 struct nfs4_cached_acl {
2690 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2692 struct nfs_inode *nfsi = NFS_I(inode);
2694 spin_lock(&inode->i_lock);
2695 kfree(nfsi->nfs4_acl);
2696 nfsi->nfs4_acl = acl;
2697 spin_unlock(&inode->i_lock);
2700 static void nfs4_zap_acl_attr(struct inode *inode)
2702 nfs4_set_cached_acl(inode, NULL);
2705 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2707 struct nfs_inode *nfsi = NFS_I(inode);
2708 struct nfs4_cached_acl *acl;
2711 spin_lock(&inode->i_lock);
2712 acl = nfsi->nfs4_acl;
2715 if (buf == NULL) /* user is just asking for length */
2717 if (acl->cached == 0)
2719 ret = -ERANGE; /* see getxattr(2) man page */
2720 if (acl->len > buflen)
2722 memcpy(buf, acl->data, acl->len);
2726 spin_unlock(&inode->i_lock);
2730 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2732 struct nfs4_cached_acl *acl;
2734 if (buf && acl_len <= PAGE_SIZE) {
2735 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2739 memcpy(acl->data, buf, acl_len);
2741 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2748 nfs4_set_cached_acl(inode, acl);
2751 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2753 struct page *pages[NFS4ACL_MAXPAGES];
2754 struct nfs_getaclargs args = {
2755 .fh = NFS_FH(inode),
2759 size_t resp_len = buflen;
2761 struct rpc_message msg = {
2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2764 .rpc_resp = &resp_len,
2766 struct page *localpage = NULL;
2769 if (buflen < PAGE_SIZE) {
2770 /* As long as we're doing a round trip to the server anyway,
2771 * let's be prepared for a page of acl data. */
2772 localpage = alloc_page(GFP_KERNEL);
2773 resp_buf = page_address(localpage);
2774 if (localpage == NULL)
2776 args.acl_pages[0] = localpage;
2777 args.acl_pgbase = 0;
2778 resp_len = args.acl_len = PAGE_SIZE;
2781 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2783 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2786 if (resp_len > args.acl_len)
2787 nfs4_write_cached_acl(inode, NULL, resp_len);
2789 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2792 if (resp_len > buflen)
2795 memcpy(buf, resp_buf, resp_len);
2800 __free_page(localpage);
2804 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2806 struct nfs4_exception exception = { };
2809 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2812 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2813 } while (exception.retry);
2817 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2819 struct nfs_server *server = NFS_SERVER(inode);
2822 if (!nfs4_server_supports_acls(server))
2824 ret = nfs_revalidate_inode(server, inode);
2827 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2828 nfs_zap_acl_cache(inode);
2829 ret = nfs4_read_cached_acl(inode, buf, buflen);
2832 return nfs4_get_acl_uncached(inode, buf, buflen);
2835 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2837 struct nfs_server *server = NFS_SERVER(inode);
2838 struct page *pages[NFS4ACL_MAXPAGES];
2839 struct nfs_setaclargs arg = {
2840 .fh = NFS_FH(inode),
2844 struct rpc_message msg = {
2845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2851 if (!nfs4_server_supports_acls(server))
2853 nfs_inode_return_delegation(inode);
2854 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2855 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2856 nfs_access_zap_cache(inode);
2857 nfs_zap_acl_cache(inode);
2861 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2863 struct nfs4_exception exception = { };
2866 err = nfs4_handle_exception(NFS_SERVER(inode),
2867 __nfs4_proc_set_acl(inode, buf, buflen),
2869 } while (exception.retry);
2874 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
2876 struct nfs_client *clp = server->nfs_client;
2878 if (!clp || task->tk_status >= 0)
2880 switch(task->tk_status) {
2881 case -NFS4ERR_ADMIN_REVOKED:
2882 case -NFS4ERR_BAD_STATEID:
2883 case -NFS4ERR_OPENMODE:
2886 nfs4_state_mark_reclaim_nograce(clp, state);
2887 case -NFS4ERR_STALE_CLIENTID:
2888 case -NFS4ERR_STALE_STATEID:
2889 case -NFS4ERR_EXPIRED:
2890 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2891 nfs4_schedule_state_recovery(clp);
2892 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
2893 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2894 task->tk_status = 0;
2896 case -NFS4ERR_DELAY:
2897 nfs_inc_server_stats(server, NFSIOS_DELAY);
2898 case -NFS4ERR_GRACE:
2899 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2900 task->tk_status = 0;
2902 case -NFS4ERR_OLD_STATEID:
2903 task->tk_status = 0;
2906 task->tk_status = nfs4_map_errors(task->tk_status);
2910 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2912 nfs4_verifier sc_verifier;
2913 struct nfs4_setclientid setclientid = {
2914 .sc_verifier = &sc_verifier,
2917 struct rpc_message msg = {
2918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2919 .rpc_argp = &setclientid,
2927 p = (__be32*)sc_verifier.data;
2928 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2929 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2932 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2933 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2935 rpc_peeraddr2str(clp->cl_rpcclient,
2937 rpc_peeraddr2str(clp->cl_rpcclient,
2939 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2940 clp->cl_id_uniquifier);
2941 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2942 sizeof(setclientid.sc_netid),
2943 rpc_peeraddr2str(clp->cl_rpcclient,
2944 RPC_DISPLAY_NETID));
2945 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2946 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2947 clp->cl_ipaddr, port >> 8, port & 255);
2949 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2950 if (status != -NFS4ERR_CLID_INUSE)
2955 ssleep(clp->cl_lease_time + 1);
2957 if (++clp->cl_id_uniquifier == 0)
2963 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2965 struct nfs_fsinfo fsinfo;
2966 struct rpc_message msg = {
2967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2969 .rpc_resp = &fsinfo,
2976 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2978 spin_lock(&clp->cl_lock);
2979 clp->cl_lease_time = fsinfo.lease_time * HZ;
2980 clp->cl_last_renewal = now;
2981 spin_unlock(&clp->cl_lock);
2986 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2991 err = _nfs4_proc_setclientid_confirm(clp, cred);
2995 case -NFS4ERR_RESOURCE:
2996 /* The IBM lawyers misread another document! */
2997 case -NFS4ERR_DELAY:
2998 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3004 struct nfs4_delegreturndata {
3005 struct nfs4_delegreturnargs args;
3006 struct nfs4_delegreturnres res;
3008 nfs4_stateid stateid;
3009 unsigned long timestamp;
3010 struct nfs_fattr fattr;
3014 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3016 struct nfs4_delegreturndata *data = calldata;
3017 data->rpc_status = task->tk_status;
3018 if (data->rpc_status == 0)
3019 renew_lease(data->res.server, data->timestamp);
3022 static void nfs4_delegreturn_release(void *calldata)
3027 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3028 .rpc_call_done = nfs4_delegreturn_done,
3029 .rpc_release = nfs4_delegreturn_release,
3032 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3034 struct nfs4_delegreturndata *data;
3035 struct nfs_server *server = NFS_SERVER(inode);
3036 struct rpc_task *task;
3037 struct rpc_message msg = {
3038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3041 struct rpc_task_setup task_setup_data = {
3042 .rpc_client = server->client,
3043 .rpc_message = &msg,
3044 .callback_ops = &nfs4_delegreturn_ops,
3045 .flags = RPC_TASK_ASYNC,
3049 data = kmalloc(sizeof(*data), GFP_KERNEL);
3052 data->args.fhandle = &data->fh;
3053 data->args.stateid = &data->stateid;
3054 data->args.bitmask = server->attr_bitmask;
3055 nfs_copy_fh(&data->fh, NFS_FH(inode));
3056 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3057 data->res.fattr = &data->fattr;
3058 data->res.server = server;
3059 nfs_fattr_init(data->res.fattr);
3060 data->timestamp = jiffies;
3061 data->rpc_status = 0;
3063 task_setup_data.callback_data = data;
3064 msg.rpc_argp = &data->args,
3065 msg.rpc_resp = &data->res,
3066 task = rpc_run_task(&task_setup_data);
3068 return PTR_ERR(task);
3071 status = nfs4_wait_for_completion_rpc_task(task);
3074 status = data->rpc_status;
3077 nfs_refresh_inode(inode, &data->fattr);
3083 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3085 struct nfs_server *server = NFS_SERVER(inode);
3086 struct nfs4_exception exception = { };
3089 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3091 case -NFS4ERR_STALE_STATEID:
3092 case -NFS4ERR_EXPIRED:
3096 err = nfs4_handle_exception(server, err, &exception);
3097 } while (exception.retry);
3101 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3102 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3105 * sleep, with exponential backoff, and retry the LOCK operation.
3107 static unsigned long
3108 nfs4_set_lock_task_retry(unsigned long timeout)
3110 schedule_timeout_killable(timeout);
3112 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3113 return NFS4_LOCK_MAXTIMEOUT;
3117 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3119 struct inode *inode = state->inode;
3120 struct nfs_server *server = NFS_SERVER(inode);
3121 struct nfs_client *clp = server->nfs_client;
3122 struct nfs_lockt_args arg = {
3123 .fh = NFS_FH(inode),
3126 struct nfs_lockt_res res = {
3129 struct rpc_message msg = {
3130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3133 .rpc_cred = state->owner->so_cred,
3135 struct nfs4_lock_state *lsp;
3138 arg.lock_owner.clientid = clp->cl_clientid;
3139 status = nfs4_set_lock_state(state, request);
3142 lsp = request->fl_u.nfs4_fl.owner;
3143 arg.lock_owner.id = lsp->ls_id.id;
3144 status = rpc_call_sync(server->client, &msg, 0);
3147 request->fl_type = F_UNLCK;
3149 case -NFS4ERR_DENIED:
3152 request->fl_ops->fl_release_private(request);
3157 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3159 struct nfs4_exception exception = { };
3163 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3164 _nfs4_proc_getlk(state, cmd, request),
3166 } while (exception.retry);
3170 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3173 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3175 res = posix_lock_file_wait(file, fl);
3178 res = flock_lock_file_wait(file, fl);
3186 struct nfs4_unlockdata {
3187 struct nfs_locku_args arg;
3188 struct nfs_locku_res res;
3189 struct nfs4_lock_state *lsp;
3190 struct nfs_open_context *ctx;
3191 struct file_lock fl;
3192 const struct nfs_server *server;
3193 unsigned long timestamp;
3196 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3197 struct nfs_open_context *ctx,
3198 struct nfs4_lock_state *lsp,
3199 struct nfs_seqid *seqid)
3201 struct nfs4_unlockdata *p;
3202 struct inode *inode = lsp->ls_state->inode;
3204 p = kmalloc(sizeof(*p), GFP_KERNEL);
3207 p->arg.fh = NFS_FH(inode);
3209 p->arg.seqid = seqid;
3210 p->res.seqid = seqid;
3211 p->arg.stateid = &lsp->ls_stateid;
3213 atomic_inc(&lsp->ls_count);
3214 /* Ensure we don't close file until we're done freeing locks! */
3215 p->ctx = get_nfs_open_context(ctx);
3216 memcpy(&p->fl, fl, sizeof(p->fl));
3217 p->server = NFS_SERVER(inode);
3221 static void nfs4_locku_release_calldata(void *data)
3223 struct nfs4_unlockdata *calldata = data;
3224 nfs_free_seqid(calldata->arg.seqid);
3225 nfs4_put_lock_state(calldata->lsp);
3226 put_nfs_open_context(calldata->ctx);
3230 static void nfs4_locku_done(struct rpc_task *task, void *data)
3232 struct nfs4_unlockdata *calldata = data;
3234 if (RPC_ASSASSINATED(task))
3236 switch (task->tk_status) {
3238 memcpy(calldata->lsp->ls_stateid.data,
3239 calldata->res.stateid.data,
3240 sizeof(calldata->lsp->ls_stateid.data));
3241 renew_lease(calldata->server, calldata->timestamp);
3243 case -NFS4ERR_BAD_STATEID:
3244 case -NFS4ERR_OLD_STATEID:
3245 case -NFS4ERR_STALE_STATEID:
3246 case -NFS4ERR_EXPIRED:
3249 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3250 rpc_restart_call(task);
3254 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3256 struct nfs4_unlockdata *calldata = data;
3258 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3260 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3261 /* Note: exit _without_ running nfs4_locku_done */
3262 task->tk_action = NULL;
3265 calldata->timestamp = jiffies;
3266 rpc_call_start(task);
3269 static const struct rpc_call_ops nfs4_locku_ops = {
3270 .rpc_call_prepare = nfs4_locku_prepare,
3271 .rpc_call_done = nfs4_locku_done,
3272 .rpc_release = nfs4_locku_release_calldata,
3275 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3276 struct nfs_open_context *ctx,
3277 struct nfs4_lock_state *lsp,
3278 struct nfs_seqid *seqid)
3280 struct nfs4_unlockdata *data;
3281 struct rpc_message msg = {
3282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3283 .rpc_cred = ctx->cred,
3285 struct rpc_task_setup task_setup_data = {
3286 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3287 .rpc_message = &msg,
3288 .callback_ops = &nfs4_locku_ops,
3289 .workqueue = nfsiod_workqueue,
3290 .flags = RPC_TASK_ASYNC,
3293 /* Ensure this is an unlock - when canceling a lock, the
3294 * canceled lock is passed in, and it won't be an unlock.
3296 fl->fl_type = F_UNLCK;
3298 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3300 nfs_free_seqid(seqid);
3301 return ERR_PTR(-ENOMEM);
3304 msg.rpc_argp = &data->arg,
3305 msg.rpc_resp = &data->res,
3306 task_setup_data.callback_data = data;
3307 return rpc_run_task(&task_setup_data);
3310 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3312 struct nfs_inode *nfsi = NFS_I(state->inode);
3313 struct nfs_seqid *seqid;
3314 struct nfs4_lock_state *lsp;
3315 struct rpc_task *task;
3317 unsigned char fl_flags = request->fl_flags;
3319 status = nfs4_set_lock_state(state, request);
3320 /* Unlock _before_ we do the RPC call */
3321 request->fl_flags |= FL_EXISTS;
3322 down_read(&nfsi->rwsem);
3323 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3324 up_read(&nfsi->rwsem);
3327 up_read(&nfsi->rwsem);
3330 /* Is this a delegated lock? */
3331 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3333 lsp = request->fl_u.nfs4_fl.owner;
3334 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3338 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3339 status = PTR_ERR(task);
3342 status = nfs4_wait_for_completion_rpc_task(task);
3345 request->fl_flags = fl_flags;
3349 struct nfs4_lockdata {
3350 struct nfs_lock_args arg;
3351 struct nfs_lock_res res;
3352 struct nfs4_lock_state *lsp;
3353 struct nfs_open_context *ctx;
3354 struct file_lock fl;
3355 unsigned long timestamp;
3360 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3361 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3363 struct nfs4_lockdata *p;
3364 struct inode *inode = lsp->ls_state->inode;
3365 struct nfs_server *server = NFS_SERVER(inode);
3367 p = kzalloc(sizeof(*p), GFP_KERNEL);
3371 p->arg.fh = NFS_FH(inode);
3373 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3374 if (p->arg.open_seqid == NULL)
3376 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3377 if (p->arg.lock_seqid == NULL)
3378 goto out_free_seqid;
3379 p->arg.lock_stateid = &lsp->ls_stateid;
3380 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3381 p->arg.lock_owner.id = lsp->ls_id.id;
3382 p->res.lock_seqid = p->arg.lock_seqid;
3384 atomic_inc(&lsp->ls_count);
3385 p->ctx = get_nfs_open_context(ctx);
3386 memcpy(&p->fl, fl, sizeof(p->fl));
3389 nfs_free_seqid(p->arg.open_seqid);
3395 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3397 struct nfs4_lockdata *data = calldata;
3398 struct nfs4_state *state = data->lsp->ls_state;
3400 dprintk("%s: begin!\n", __func__);
3401 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3403 /* Do we need to do an open_to_lock_owner? */
3404 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3405 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3407 data->arg.open_stateid = &state->stateid;
3408 data->arg.new_lock_owner = 1;
3409 data->res.open_seqid = data->arg.open_seqid;
3411 data->arg.new_lock_owner = 0;
3412 data->timestamp = jiffies;
3413 rpc_call_start(task);
3414 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3417 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3419 struct nfs4_lockdata *data = calldata;
3421 dprintk("%s: begin!\n", __func__);
3423 data->rpc_status = task->tk_status;
3424 if (RPC_ASSASSINATED(task))
3426 if (data->arg.new_lock_owner != 0) {
3427 if (data->rpc_status == 0)
3428 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3432 if (data->rpc_status == 0) {
3433 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3434 sizeof(data->lsp->ls_stateid.data));
3435 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3436 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3439 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3442 static void nfs4_lock_release(void *calldata)
3444 struct nfs4_lockdata *data = calldata;
3446 dprintk("%s: begin!\n", __func__);
3447 nfs_free_seqid(data->arg.open_seqid);
3448 if (data->cancelled != 0) {
3449 struct rpc_task *task;
3450 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3451 data->arg.lock_seqid);
3454 dprintk("%s: cancelling lock!\n", __func__);
3456 nfs_free_seqid(data->arg.lock_seqid);
3457 nfs4_put_lock_state(data->lsp);
3458 put_nfs_open_context(data->ctx);
3460 dprintk("%s: done!\n", __func__);
3463 static const struct rpc_call_ops nfs4_lock_ops = {
3464 .rpc_call_prepare = nfs4_lock_prepare,
3465 .rpc_call_done = nfs4_lock_done,
3466 .rpc_release = nfs4_lock_release,
3469 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3471 struct nfs4_lockdata *data;
3472 struct rpc_task *task;
3473 struct rpc_message msg = {
3474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3475 .rpc_cred = state->owner->so_cred,
3477 struct rpc_task_setup task_setup_data = {
3478 .rpc_client = NFS_CLIENT(state->inode),
3479 .rpc_message = &msg,
3480 .callback_ops = &nfs4_lock_ops,
3481 .workqueue = nfsiod_workqueue,
3482 .flags = RPC_TASK_ASYNC,
3486 dprintk("%s: begin!\n", __func__);
3487 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3488 fl->fl_u.nfs4_fl.owner);
3492 data->arg.block = 1;
3494 data->arg.reclaim = 1;
3495 msg.rpc_argp = &data->arg,
3496 msg.rpc_resp = &data->res,
3497 task_setup_data.callback_data = data;
3498 task = rpc_run_task(&task_setup_data);
3500 return PTR_ERR(task);
3501 ret = nfs4_wait_for_completion_rpc_task(task);
3503 ret = data->rpc_status;
3505 data->cancelled = 1;
3507 dprintk("%s: done, ret = %d!\n", __func__, ret);
3511 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3513 struct nfs_server *server = NFS_SERVER(state->inode);
3514 struct nfs4_exception exception = { };
3518 /* Cache the lock if possible... */
3519 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3521 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3522 if (err != -NFS4ERR_DELAY)
3524 nfs4_handle_exception(server, err, &exception);
3525 } while (exception.retry);
3529 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3531 struct nfs_server *server = NFS_SERVER(state->inode);
3532 struct nfs4_exception exception = { };
3535 err = nfs4_set_lock_state(state, request);
3539 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3541 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3542 if (err != -NFS4ERR_DELAY)
3544 nfs4_handle_exception(server, err, &exception);
3545 } while (exception.retry);
3549 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3551 struct nfs_inode *nfsi = NFS_I(state->inode);
3552 unsigned char fl_flags = request->fl_flags;
3555 /* Is this a delegated open? */
3556 status = nfs4_set_lock_state(state, request);
3559 request->fl_flags |= FL_ACCESS;
3560 status = do_vfs_lock(request->fl_file, request);
3563 down_read(&nfsi->rwsem);
3564 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3565 /* Yes: cache locks! */
3566 /* ...but avoid races with delegation recall... */
3567 request->fl_flags = fl_flags & ~FL_SLEEP;
3568 status = do_vfs_lock(request->fl_file, request);
3571 status = _nfs4_do_setlk(state, cmd, request, 0);
3574 /* Note: we always want to sleep here! */
3575 request->fl_flags = fl_flags | FL_SLEEP;
3576 if (do_vfs_lock(request->fl_file, request) < 0)
3577 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3579 up_read(&nfsi->rwsem);
3581 request->fl_flags = fl_flags;
3585 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3587 struct nfs4_exception exception = { };
3591 err = _nfs4_proc_setlk(state, cmd, request);
3592 if (err == -NFS4ERR_DENIED)
3594 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3596 } while (exception.retry);
3601 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3603 struct nfs_open_context *ctx;
3604 struct nfs4_state *state;
3605 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3608 /* verify open state */
3609 ctx = nfs_file_open_context(filp);
3612 if (request->fl_start < 0 || request->fl_end < 0)
3616 return nfs4_proc_getlk(state, F_GETLK, request);
3618 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3621 if (request->fl_type == F_UNLCK)
3622 return nfs4_proc_unlck(state, cmd, request);
3625 status = nfs4_proc_setlk(state, cmd, request);
3626 if ((status != -EAGAIN) || IS_SETLK(cmd))
3628 timeout = nfs4_set_lock_task_retry(timeout);
3629 status = -ERESTARTSYS;
3632 } while(status < 0);
3636 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3638 struct nfs_server *server = NFS_SERVER(state->inode);
3639 struct nfs4_exception exception = { };
3642 err = nfs4_set_lock_state(state, fl);
3646 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3649 printk(KERN_ERR "%s: unhandled error %d.\n",
3654 case -NFS4ERR_EXPIRED:
3655 case -NFS4ERR_STALE_CLIENTID:
3656 case -NFS4ERR_STALE_STATEID:
3657 nfs4_schedule_state_recovery(server->nfs_client);
3661 * The show must go on: exit, but mark the
3662 * stateid as needing recovery.
3664 case -NFS4ERR_ADMIN_REVOKED:
3665 case -NFS4ERR_BAD_STATEID:
3666 case -NFS4ERR_OPENMODE:
3667 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
3671 case -NFS4ERR_DENIED:
3672 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
3675 case -NFS4ERR_DELAY:
3678 err = nfs4_handle_exception(server, err, &exception);
3679 } while (exception.retry);
3684 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3686 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3687 size_t buflen, int flags)
3689 struct inode *inode = dentry->d_inode;
3691 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3694 return nfs4_proc_set_acl(inode, buf, buflen);
3697 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3698 * and that's what we'll do for e.g. user attributes that haven't been set.
3699 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3700 * attributes in kernel-managed attribute namespaces. */
3701 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3704 struct inode *inode = dentry->d_inode;
3706 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3709 return nfs4_proc_get_acl(inode, buf, buflen);
3712 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3714 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3716 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3718 if (buf && buflen < len)
3721 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3725 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
3727 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
3728 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
3729 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
3732 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3733 NFS_ATTR_FATTR_NLINK;
3734 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3738 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3739 struct nfs4_fs_locations *fs_locations, struct page *page)
3741 struct nfs_server *server = NFS_SERVER(dir);
3743 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3744 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3746 struct nfs4_fs_locations_arg args = {
3747 .dir_fh = NFS_FH(dir),
3752 struct rpc_message msg = {
3753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3755 .rpc_resp = fs_locations,
3759 dprintk("%s: start\n", __func__);
3760 nfs_fattr_init(&fs_locations->fattr);
3761 fs_locations->server = server;
3762 fs_locations->nlocations = 0;
3763 status = rpc_call_sync(server->client, &msg, 0);
3764 nfs_fixup_referral_attributes(&fs_locations->fattr);
3765 dprintk("%s: returned status = %d\n", __func__, status);
3769 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3770 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
3771 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
3772 .recover_open = nfs4_open_reclaim,
3773 .recover_lock = nfs4_lock_reclaim,
3776 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3777 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
3778 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
3779 .recover_open = nfs4_open_expired,
3780 .recover_lock = nfs4_lock_expired,
3783 static const struct inode_operations nfs4_file_inode_operations = {
3784 .permission = nfs_permission,
3785 .getattr = nfs_getattr,
3786 .setattr = nfs_setattr,
3787 .getxattr = nfs4_getxattr,
3788 .setxattr = nfs4_setxattr,
3789 .listxattr = nfs4_listxattr,
3792 const struct nfs_rpc_ops nfs_v4_clientops = {
3793 .version = 4, /* protocol version */
3794 .dentry_ops = &nfs4_dentry_operations,
3795 .dir_inode_ops = &nfs4_dir_inode_operations,
3796 .file_inode_ops = &nfs4_file_inode_operations,
3797 .getroot = nfs4_proc_get_root,
3798 .getattr = nfs4_proc_getattr,
3799 .setattr = nfs4_proc_setattr,
3800 .lookupfh = nfs4_proc_lookupfh,
3801 .lookup = nfs4_proc_lookup,
3802 .access = nfs4_proc_access,
3803 .readlink = nfs4_proc_readlink,
3804 .create = nfs4_proc_create,
3805 .remove = nfs4_proc_remove,
3806 .unlink_setup = nfs4_proc_unlink_setup,
3807 .unlink_done = nfs4_proc_unlink_done,
3808 .rename = nfs4_proc_rename,
3809 .link = nfs4_proc_link,
3810 .symlink = nfs4_proc_symlink,
3811 .mkdir = nfs4_proc_mkdir,
3812 .rmdir = nfs4_proc_remove,
3813 .readdir = nfs4_proc_readdir,
3814 .mknod = nfs4_proc_mknod,
3815 .statfs = nfs4_proc_statfs,
3816 .fsinfo = nfs4_proc_fsinfo,
3817 .pathconf = nfs4_proc_pathconf,
3818 .set_capabilities = nfs4_server_capabilities,
3819 .decode_dirent = nfs4_decode_dirent,
3820 .read_setup = nfs4_proc_read_setup,
3821 .read_done = nfs4_read_done,
3822 .write_setup = nfs4_proc_write_setup,
3823 .write_done = nfs4_write_done,
3824 .commit_setup = nfs4_proc_commit_setup,
3825 .commit_done = nfs4_commit_done,
3826 .lock = nfs4_proc_lock,
3827 .clear_acl_cache = nfs4_zap_acl_attr,
3828 .close_context = nfs4_close_context,