4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static int nfs4_wait_bit_killable(void *word)
198 if (fatal_signal_pending(current))
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
211 nfs4_wait_bit_killable, TASK_KILLABLE);
215 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
222 *timeout = NFS4_POLL_RETRY_MIN;
223 if (*timeout > NFS4_POLL_RETRY_MAX)
224 *timeout = NFS4_POLL_RETRY_MAX;
225 schedule_timeout_killable(*timeout);
226 if (fatal_signal_pending(current))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
237 struct nfs_client *clp = server->nfs_client;
238 struct nfs4_state *state = exception->state;
241 exception->retry = 0;
245 case -NFS4ERR_ADMIN_REVOKED:
246 case -NFS4ERR_BAD_STATEID:
247 case -NFS4ERR_OPENMODE:
250 nfs4_state_mark_reclaim_nograce(clp, state);
251 case -NFS4ERR_STALE_CLIENTID:
252 case -NFS4ERR_STALE_STATEID:
253 case -NFS4ERR_EXPIRED:
254 nfs4_schedule_state_recovery(clp);
255 ret = nfs4_wait_clnt_recover(clp);
257 exception->retry = 1;
259 case -NFS4ERR_FILE_OPEN:
262 ret = nfs4_delay(server->client, &exception->timeout);
265 case -NFS4ERR_OLD_STATEID:
266 exception->retry = 1;
268 /* We failed to handle the error */
269 return nfs4_map_errors(ret);
273 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
275 struct nfs_client *clp = server->nfs_client;
276 spin_lock(&clp->cl_lock);
277 if (time_before(clp->cl_last_renewal,timestamp))
278 clp->cl_last_renewal = timestamp;
279 spin_unlock(&clp->cl_lock);
282 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
284 struct nfs_inode *nfsi = NFS_I(dir);
286 spin_lock(&dir->i_lock);
287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
288 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
289 nfs_force_lookup_revalidate(dir);
290 nfsi->change_attr = cinfo->after;
291 spin_unlock(&dir->i_lock);
294 struct nfs4_opendata {
296 struct nfs_openargs o_arg;
297 struct nfs_openres o_res;
298 struct nfs_open_confirmargs c_arg;
299 struct nfs_open_confirmres c_res;
300 struct nfs_fattr f_attr;
301 struct nfs_fattr dir_attr;
304 struct nfs4_state_owner *owner;
305 struct nfs4_state *state;
307 unsigned long timestamp;
308 unsigned int rpc_done : 1;
314 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
316 p->o_res.f_attr = &p->f_attr;
317 p->o_res.dir_attr = &p->dir_attr;
318 p->o_res.seqid = p->o_arg.seqid;
319 p->c_res.seqid = p->c_arg.seqid;
320 p->o_res.server = p->o_arg.server;
321 nfs_fattr_init(&p->f_attr);
322 nfs_fattr_init(&p->dir_attr);
325 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
326 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
327 const struct iattr *attrs)
329 struct dentry *parent = dget_parent(path->dentry);
330 struct inode *dir = parent->d_inode;
331 struct nfs_server *server = NFS_SERVER(dir);
332 struct nfs4_opendata *p;
334 p = kzalloc(sizeof(*p), GFP_KERNEL);
337 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
338 if (p->o_arg.seqid == NULL)
340 p->path.mnt = mntget(path->mnt);
341 p->path.dentry = dget(path->dentry);
344 atomic_inc(&sp->so_count);
345 p->o_arg.fh = NFS_FH(dir);
346 p->o_arg.open_flags = flags;
347 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
348 p->o_arg.clientid = server->nfs_client->cl_clientid;
349 p->o_arg.id = sp->so_owner_id.id;
350 p->o_arg.name = &p->path.dentry->d_name;
351 p->o_arg.server = server;
352 p->o_arg.bitmask = server->attr_bitmask;
353 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
354 if (flags & O_EXCL) {
355 u32 *s = (u32 *) p->o_arg.u.verifier.data;
358 } else if (flags & O_CREAT) {
359 p->o_arg.u.attrs = &p->attrs;
360 memcpy(&p->attrs, attrs, sizeof(p->attrs));
362 p->c_arg.fh = &p->o_res.fh;
363 p->c_arg.stateid = &p->o_res.stateid;
364 p->c_arg.seqid = p->o_arg.seqid;
365 nfs4_init_opendata_res(p);
375 static void nfs4_opendata_free(struct kref *kref)
377 struct nfs4_opendata *p = container_of(kref,
378 struct nfs4_opendata, kref);
380 nfs_free_seqid(p->o_arg.seqid);
381 if (p->state != NULL)
382 nfs4_put_open_state(p->state);
383 nfs4_put_state_owner(p->owner);
389 static void nfs4_opendata_put(struct nfs4_opendata *p)
392 kref_put(&p->kref, nfs4_opendata_free);
395 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
399 ret = rpc_wait_for_completion_task(task);
403 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
407 if (open_mode & O_EXCL)
409 switch (mode & (FMODE_READ|FMODE_WRITE)) {
411 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
414 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
416 case FMODE_READ|FMODE_WRITE:
417 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
423 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
425 if ((delegation->type & fmode) != fmode)
427 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
429 nfs_mark_delegation_referenced(delegation);
433 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
442 case FMODE_READ|FMODE_WRITE:
445 nfs4_state_set_mode_locked(state, state->state | fmode);
448 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
450 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
451 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
452 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
455 set_bit(NFS_O_RDONLY_STATE, &state->flags);
458 set_bit(NFS_O_WRONLY_STATE, &state->flags);
460 case FMODE_READ|FMODE_WRITE:
461 set_bit(NFS_O_RDWR_STATE, &state->flags);
465 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
467 write_seqlock(&state->seqlock);
468 nfs_set_open_stateid_locked(state, stateid, fmode);
469 write_sequnlock(&state->seqlock);
472 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
475 * Protect the call to nfs4_state_set_mode_locked and
476 * serialise the stateid update
478 write_seqlock(&state->seqlock);
479 if (deleg_stateid != NULL) {
480 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
481 set_bit(NFS_DELEGATED_STATE, &state->flags);
483 if (open_stateid != NULL)
484 nfs_set_open_stateid_locked(state, open_stateid, fmode);
485 write_sequnlock(&state->seqlock);
486 spin_lock(&state->owner->so_lock);
487 update_open_stateflags(state, fmode);
488 spin_unlock(&state->owner->so_lock);
491 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
493 struct nfs_inode *nfsi = NFS_I(state->inode);
494 struct nfs_delegation *deleg_cur;
497 fmode &= (FMODE_READ|FMODE_WRITE);
500 deleg_cur = rcu_dereference(nfsi->delegation);
501 if (deleg_cur == NULL)
504 spin_lock(&deleg_cur->lock);
505 if (nfsi->delegation != deleg_cur ||
506 (deleg_cur->type & fmode) != fmode)
507 goto no_delegation_unlock;
509 if (delegation == NULL)
510 delegation = &deleg_cur->stateid;
511 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
512 goto no_delegation_unlock;
514 nfs_mark_delegation_referenced(deleg_cur);
515 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
517 no_delegation_unlock:
518 spin_unlock(&deleg_cur->lock);
522 if (!ret && open_stateid != NULL) {
523 __update_open_stateid(state, open_stateid, NULL, fmode);
531 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
533 struct nfs_delegation *delegation;
536 delegation = rcu_dereference(NFS_I(inode)->delegation);
537 if (delegation == NULL || (delegation->type & fmode) == fmode) {
542 nfs_inode_return_delegation(inode);
545 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
547 struct nfs4_state *state = opendata->state;
548 struct nfs_inode *nfsi = NFS_I(state->inode);
549 struct nfs_delegation *delegation;
550 int open_mode = opendata->o_arg.open_flags & O_EXCL;
551 fmode_t fmode = opendata->o_arg.fmode;
552 nfs4_stateid stateid;
556 if (can_open_cached(state, fmode, open_mode)) {
557 spin_lock(&state->owner->so_lock);
558 if (can_open_cached(state, fmode, open_mode)) {
559 update_open_stateflags(state, fmode);
560 spin_unlock(&state->owner->so_lock);
561 goto out_return_state;
563 spin_unlock(&state->owner->so_lock);
566 delegation = rcu_dereference(nfsi->delegation);
567 if (delegation == NULL ||
568 !can_open_delegated(delegation, fmode)) {
572 /* Save the delegation */
573 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
575 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
580 /* Try to update the stateid using the delegation */
581 if (update_open_stateid(state, NULL, &stateid, fmode))
582 goto out_return_state;
587 atomic_inc(&state->count);
591 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
594 struct nfs4_state *state = NULL;
595 struct nfs_delegation *delegation;
598 if (!data->rpc_done) {
599 state = nfs4_try_open_cached(data);
604 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
606 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
607 ret = PTR_ERR(inode);
611 state = nfs4_get_open_state(inode, data->owner);
614 if (data->o_res.delegation_type != 0) {
615 int delegation_flags = 0;
618 delegation = rcu_dereference(NFS_I(inode)->delegation);
620 delegation_flags = delegation->flags;
622 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
623 nfs_inode_set_delegation(state->inode,
624 data->owner->so_cred,
627 nfs_inode_reclaim_delegation(state->inode,
628 data->owner->so_cred,
632 update_open_stateid(state, &data->o_res.stateid, NULL,
643 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
645 struct nfs_inode *nfsi = NFS_I(state->inode);
646 struct nfs_open_context *ctx;
648 spin_lock(&state->inode->i_lock);
649 list_for_each_entry(ctx, &nfsi->open_files, list) {
650 if (ctx->state != state)
652 get_nfs_open_context(ctx);
653 spin_unlock(&state->inode->i_lock);
656 spin_unlock(&state->inode->i_lock);
657 return ERR_PTR(-ENOENT);
660 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
662 struct nfs4_opendata *opendata;
664 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
665 if (opendata == NULL)
666 return ERR_PTR(-ENOMEM);
667 opendata->state = state;
668 atomic_inc(&state->count);
672 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
674 struct nfs4_state *newstate;
677 opendata->o_arg.open_flags = 0;
678 opendata->o_arg.fmode = fmode;
679 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
680 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
681 nfs4_init_opendata_res(opendata);
682 ret = _nfs4_proc_open(opendata);
685 newstate = nfs4_opendata_to_nfs4_state(opendata);
686 if (IS_ERR(newstate))
687 return PTR_ERR(newstate);
688 nfs4_close_state(&opendata->path, newstate, fmode);
693 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
695 struct nfs4_state *newstate;
698 /* memory barrier prior to reading state->n_* */
699 clear_bit(NFS_DELEGATED_STATE, &state->flags);
701 if (state->n_rdwr != 0) {
702 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
705 if (newstate != state)
708 if (state->n_wronly != 0) {
709 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
712 if (newstate != state)
715 if (state->n_rdonly != 0) {
716 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
719 if (newstate != state)
723 * We may have performed cached opens for all three recoveries.
724 * Check if we need to update the current stateid.
726 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
727 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
728 write_seqlock(&state->seqlock);
729 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
730 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
731 write_sequnlock(&state->seqlock);
738 * reclaim state on the server after a reboot.
740 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
742 struct nfs_delegation *delegation;
743 struct nfs4_opendata *opendata;
744 fmode_t delegation_type = 0;
747 opendata = nfs4_open_recoverdata_alloc(ctx, state);
748 if (IS_ERR(opendata))
749 return PTR_ERR(opendata);
750 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
751 opendata->o_arg.fh = NFS_FH(state->inode);
753 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
754 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
755 delegation_type = delegation->type;
757 opendata->o_arg.u.delegation_type = delegation_type;
758 status = nfs4_open_recover(opendata, state);
759 nfs4_opendata_put(opendata);
763 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
765 struct nfs_server *server = NFS_SERVER(state->inode);
766 struct nfs4_exception exception = { };
769 err = _nfs4_do_open_reclaim(ctx, state);
770 if (err != -NFS4ERR_DELAY)
772 nfs4_handle_exception(server, err, &exception);
773 } while (exception.retry);
777 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
779 struct nfs_open_context *ctx;
782 ctx = nfs4_state_find_open_context(state);
785 ret = nfs4_do_open_reclaim(ctx, state);
786 put_nfs_open_context(ctx);
790 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
792 struct nfs4_opendata *opendata;
795 opendata = nfs4_open_recoverdata_alloc(ctx, state);
796 if (IS_ERR(opendata))
797 return PTR_ERR(opendata);
798 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
799 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
800 sizeof(opendata->o_arg.u.delegation.data));
801 ret = nfs4_open_recover(opendata, state);
802 nfs4_opendata_put(opendata);
806 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
808 struct nfs4_exception exception = { };
809 struct nfs_server *server = NFS_SERVER(state->inode);
812 err = _nfs4_open_delegation_recall(ctx, state, stateid);
816 case -NFS4ERR_STALE_CLIENTID:
817 case -NFS4ERR_STALE_STATEID:
818 case -NFS4ERR_EXPIRED:
819 /* Don't recall a delegation if it was lost */
820 nfs4_schedule_state_recovery(server->nfs_client);
823 err = nfs4_handle_exception(server, err, &exception);
824 } while (exception.retry);
828 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
830 struct nfs4_opendata *data = calldata;
832 data->rpc_status = task->tk_status;
833 if (RPC_ASSASSINATED(task))
835 if (data->rpc_status == 0) {
836 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
837 sizeof(data->o_res.stateid.data));
838 nfs_confirm_seqid(&data->owner->so_seqid, 0);
839 renew_lease(data->o_res.server, data->timestamp);
844 static void nfs4_open_confirm_release(void *calldata)
846 struct nfs4_opendata *data = calldata;
847 struct nfs4_state *state = NULL;
849 /* If this request hasn't been cancelled, do nothing */
850 if (data->cancelled == 0)
852 /* In case of error, no cleanup! */
855 state = nfs4_opendata_to_nfs4_state(data);
857 nfs4_close_state(&data->path, state, data->o_arg.fmode);
859 nfs4_opendata_put(data);
862 static const struct rpc_call_ops nfs4_open_confirm_ops = {
863 .rpc_call_done = nfs4_open_confirm_done,
864 .rpc_release = nfs4_open_confirm_release,
868 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
870 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
872 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
873 struct rpc_task *task;
874 struct rpc_message msg = {
875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
876 .rpc_argp = &data->c_arg,
877 .rpc_resp = &data->c_res,
878 .rpc_cred = data->owner->so_cred,
880 struct rpc_task_setup task_setup_data = {
881 .rpc_client = server->client,
883 .callback_ops = &nfs4_open_confirm_ops,
884 .callback_data = data,
885 .workqueue = nfsiod_workqueue,
886 .flags = RPC_TASK_ASYNC,
890 kref_get(&data->kref);
892 data->rpc_status = 0;
893 data->timestamp = jiffies;
894 task = rpc_run_task(&task_setup_data);
896 return PTR_ERR(task);
897 status = nfs4_wait_for_completion_rpc_task(task);
902 status = data->rpc_status;
907 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
909 struct nfs4_opendata *data = calldata;
910 struct nfs4_state_owner *sp = data->owner;
912 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
915 * Check if we still need to send an OPEN call, or if we can use
916 * a delegation instead.
918 if (data->state != NULL) {
919 struct nfs_delegation *delegation;
921 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
924 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
925 if (delegation != NULL &&
926 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
932 /* Update sequence id. */
933 data->o_arg.id = sp->so_owner_id.id;
934 data->o_arg.clientid = sp->so_client->cl_clientid;
935 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
936 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
937 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
939 data->timestamp = jiffies;
940 rpc_call_start(task);
943 task->tk_action = NULL;
947 static void nfs4_open_done(struct rpc_task *task, void *calldata)
949 struct nfs4_opendata *data = calldata;
951 data->rpc_status = task->tk_status;
952 if (RPC_ASSASSINATED(task))
954 if (task->tk_status == 0) {
955 switch (data->o_res.f_attr->mode & S_IFMT) {
959 data->rpc_status = -ELOOP;
962 data->rpc_status = -EISDIR;
965 data->rpc_status = -ENOTDIR;
967 renew_lease(data->o_res.server, data->timestamp);
968 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
969 nfs_confirm_seqid(&data->owner->so_seqid, 0);
974 static void nfs4_open_release(void *calldata)
976 struct nfs4_opendata *data = calldata;
977 struct nfs4_state *state = NULL;
979 /* If this request hasn't been cancelled, do nothing */
980 if (data->cancelled == 0)
982 /* In case of error, no cleanup! */
983 if (data->rpc_status != 0 || !data->rpc_done)
985 /* In case we need an open_confirm, no cleanup! */
986 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
988 state = nfs4_opendata_to_nfs4_state(data);
990 nfs4_close_state(&data->path, state, data->o_arg.fmode);
992 nfs4_opendata_put(data);
995 static const struct rpc_call_ops nfs4_open_ops = {
996 .rpc_call_prepare = nfs4_open_prepare,
997 .rpc_call_done = nfs4_open_done,
998 .rpc_release = nfs4_open_release,
1002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1004 static int _nfs4_proc_open(struct nfs4_opendata *data)
1006 struct inode *dir = data->dir->d_inode;
1007 struct nfs_server *server = NFS_SERVER(dir);
1008 struct nfs_openargs *o_arg = &data->o_arg;
1009 struct nfs_openres *o_res = &data->o_res;
1010 struct rpc_task *task;
1011 struct rpc_message msg = {
1012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1015 .rpc_cred = data->owner->so_cred,
1017 struct rpc_task_setup task_setup_data = {
1018 .rpc_client = server->client,
1019 .rpc_message = &msg,
1020 .callback_ops = &nfs4_open_ops,
1021 .callback_data = data,
1022 .workqueue = nfsiod_workqueue,
1023 .flags = RPC_TASK_ASYNC,
1027 kref_get(&data->kref);
1029 data->rpc_status = 0;
1030 data->cancelled = 0;
1031 task = rpc_run_task(&task_setup_data);
1033 return PTR_ERR(task);
1034 status = nfs4_wait_for_completion_rpc_task(task);
1036 data->cancelled = 1;
1039 status = data->rpc_status;
1041 if (status != 0 || !data->rpc_done)
1044 if (o_res->fh.size == 0)
1045 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1047 if (o_arg->open_flags & O_CREAT) {
1048 update_changeattr(dir, &o_res->cinfo);
1049 nfs_post_op_update_inode(dir, o_res->dir_attr);
1051 nfs_refresh_inode(dir, o_res->dir_attr);
1052 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1053 status = _nfs4_proc_open_confirm(data);
1057 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1058 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1062 static int nfs4_recover_expired_lease(struct nfs_server *server)
1064 struct nfs_client *clp = server->nfs_client;
1068 ret = nfs4_wait_clnt_recover(clp);
1071 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1072 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1074 nfs4_schedule_state_recovery(clp);
1081 * reclaim state on the server after a network partition.
1082 * Assumes caller holds the appropriate lock
1084 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1086 struct nfs4_opendata *opendata;
1089 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1090 if (IS_ERR(opendata))
1091 return PTR_ERR(opendata);
1092 ret = nfs4_open_recover(opendata, state);
1094 d_drop(ctx->path.dentry);
1095 nfs4_opendata_put(opendata);
1099 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1101 struct nfs_server *server = NFS_SERVER(state->inode);
1102 struct nfs4_exception exception = { };
1106 err = _nfs4_open_expired(ctx, state);
1107 if (err == -NFS4ERR_DELAY)
1108 nfs4_handle_exception(server, err, &exception);
1109 } while (exception.retry);
1113 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1115 struct nfs_open_context *ctx;
1118 ctx = nfs4_state_find_open_context(state);
1120 return PTR_ERR(ctx);
1121 ret = nfs4_do_open_expired(ctx, state);
1122 put_nfs_open_context(ctx);
1127 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1128 * fields corresponding to attributes that were used to store the verifier.
1129 * Make sure we clobber those fields in the later setattr call
1131 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1133 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1134 !(sattr->ia_valid & ATTR_ATIME_SET))
1135 sattr->ia_valid |= ATTR_ATIME;
1137 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1138 !(sattr->ia_valid & ATTR_MTIME_SET))
1139 sattr->ia_valid |= ATTR_MTIME;
1143 * Returns a referenced nfs4_state
1145 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)
1147 struct nfs4_state_owner *sp;
1148 struct nfs4_state *state = NULL;
1149 struct nfs_server *server = NFS_SERVER(dir);
1150 struct nfs4_opendata *opendata;
1153 /* Protect against reboot recovery conflicts */
1155 if (!(sp = nfs4_get_state_owner(server, cred))) {
1156 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1159 status = nfs4_recover_expired_lease(server);
1161 goto err_put_state_owner;
1162 if (path->dentry->d_inode != NULL)
1163 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1165 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1166 if (opendata == NULL)
1167 goto err_put_state_owner;
1169 if (path->dentry->d_inode != NULL)
1170 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1172 status = _nfs4_proc_open(opendata);
1174 goto err_opendata_put;
1176 if (opendata->o_arg.open_flags & O_EXCL)
1177 nfs4_exclusive_attrset(opendata, sattr);
1179 state = nfs4_opendata_to_nfs4_state(opendata);
1180 status = PTR_ERR(state);
1182 goto err_opendata_put;
1183 nfs4_opendata_put(opendata);
1184 nfs4_put_state_owner(sp);
1188 nfs4_opendata_put(opendata);
1189 err_put_state_owner:
1190 nfs4_put_state_owner(sp);
1197 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)
1199 struct nfs4_exception exception = { };
1200 struct nfs4_state *res;
1204 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1207 /* NOTE: BAD_SEQID means the server and client disagree about the
1208 * book-keeping w.r.t. state-changing operations
1209 * (OPEN/CLOSE/LOCK/LOCKU...)
1210 * It is actually a sign of a bug on the client or on the server.
1212 * If we receive a BAD_SEQID error in the particular case of
1213 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1214 * have unhashed the old state_owner for us, and that we can
1215 * therefore safely retry using a new one. We should still warn
1216 * the user though...
1218 if (status == -NFS4ERR_BAD_SEQID) {
1219 printk(KERN_WARNING "NFS: v4 server %s "
1220 " returned a bad sequence-id error!\n",
1221 NFS_SERVER(dir)->nfs_client->cl_hostname);
1222 exception.retry = 1;
1226 * BAD_STATEID on OPEN means that the server cancelled our
1227 * state before it received the OPEN_CONFIRM.
1228 * Recover by retrying the request as per the discussion
1229 * on Page 181 of RFC3530.
1231 if (status == -NFS4ERR_BAD_STATEID) {
1232 exception.retry = 1;
1235 if (status == -EAGAIN) {
1236 /* We must have found a delegation */
1237 exception.retry = 1;
1240 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1241 status, &exception));
1242 } while (exception.retry);
1246 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1247 struct nfs_fattr *fattr, struct iattr *sattr,
1248 struct nfs4_state *state)
1250 struct nfs_server *server = NFS_SERVER(inode);
1251 struct nfs_setattrargs arg = {
1252 .fh = NFS_FH(inode),
1255 .bitmask = server->attr_bitmask,
1257 struct nfs_setattrres res = {
1261 struct rpc_message msg = {
1262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1267 unsigned long timestamp = jiffies;
1270 nfs_fattr_init(fattr);
1272 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1273 /* Use that stateid */
1274 } else if (state != NULL) {
1275 nfs4_copy_stateid(&arg.stateid, state, current->files);
1277 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1279 status = rpc_call_sync(server->client, &msg, 0);
1280 if (status == 0 && state != NULL)
1281 renew_lease(server, timestamp);
1285 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1286 struct nfs_fattr *fattr, struct iattr *sattr,
1287 struct nfs4_state *state)
1289 struct nfs_server *server = NFS_SERVER(inode);
1290 struct nfs4_exception exception = { };
1293 err = nfs4_handle_exception(server,
1294 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1296 } while (exception.retry);
1300 struct nfs4_closedata {
1302 struct inode *inode;
1303 struct nfs4_state *state;
1304 struct nfs_closeargs arg;
1305 struct nfs_closeres res;
1306 struct nfs_fattr fattr;
1307 unsigned long timestamp;
1310 static void nfs4_free_closedata(void *data)
1312 struct nfs4_closedata *calldata = data;
1313 struct nfs4_state_owner *sp = calldata->state->owner;
1315 nfs4_put_open_state(calldata->state);
1316 nfs_free_seqid(calldata->arg.seqid);
1317 nfs4_put_state_owner(sp);
1318 path_put(&calldata->path);
1322 static void nfs4_close_done(struct rpc_task *task, void *data)
1324 struct nfs4_closedata *calldata = data;
1325 struct nfs4_state *state = calldata->state;
1326 struct nfs_server *server = NFS_SERVER(calldata->inode);
1328 if (RPC_ASSASSINATED(task))
1330 /* hmm. we are done with the inode, and in the process of freeing
1331 * the state_owner. we keep this around to process errors
1333 switch (task->tk_status) {
1335 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1336 renew_lease(server, calldata->timestamp);
1338 case -NFS4ERR_STALE_STATEID:
1339 case -NFS4ERR_OLD_STATEID:
1340 case -NFS4ERR_BAD_STATEID:
1341 case -NFS4ERR_EXPIRED:
1342 if (calldata->arg.fmode == 0)
1345 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1346 rpc_restart_call(task);
1350 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1353 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1355 struct nfs4_closedata *calldata = data;
1356 struct nfs4_state *state = calldata->state;
1357 int clear_rd, clear_wr, clear_rdwr;
1359 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1362 clear_rd = clear_wr = clear_rdwr = 0;
1363 spin_lock(&state->owner->so_lock);
1364 /* Calculate the change in open mode */
1365 if (state->n_rdwr == 0) {
1366 if (state->n_rdonly == 0) {
1367 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1368 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1370 if (state->n_wronly == 0) {
1371 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1372 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1375 spin_unlock(&state->owner->so_lock);
1376 if (!clear_rd && !clear_wr && !clear_rdwr) {
1377 /* Note: exit _without_ calling nfs4_close_done */
1378 task->tk_action = NULL;
1381 nfs_fattr_init(calldata->res.fattr);
1382 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1383 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1384 calldata->arg.fmode = FMODE_READ;
1385 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1386 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1387 calldata->arg.fmode = FMODE_WRITE;
1389 calldata->timestamp = jiffies;
1390 rpc_call_start(task);
1393 static const struct rpc_call_ops nfs4_close_ops = {
1394 .rpc_call_prepare = nfs4_close_prepare,
1395 .rpc_call_done = nfs4_close_done,
1396 .rpc_release = nfs4_free_closedata,
1400 * It is possible for data to be read/written from a mem-mapped file
1401 * after the sys_close call (which hits the vfs layer as a flush).
1402 * This means that we can't safely call nfsv4 close on a file until
1403 * the inode is cleared. This in turn means that we are not good
1404 * NFSv4 citizens - we do not indicate to the server to update the file's
1405 * share state even when we are done with one of the three share
1406 * stateid's in the inode.
1408 * NOTE: Caller must be holding the sp->so_owner semaphore!
1410 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1412 struct nfs_server *server = NFS_SERVER(state->inode);
1413 struct nfs4_closedata *calldata;
1414 struct nfs4_state_owner *sp = state->owner;
1415 struct rpc_task *task;
1416 struct rpc_message msg = {
1417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1418 .rpc_cred = state->owner->so_cred,
1420 struct rpc_task_setup task_setup_data = {
1421 .rpc_client = server->client,
1422 .rpc_message = &msg,
1423 .callback_ops = &nfs4_close_ops,
1424 .workqueue = nfsiod_workqueue,
1425 .flags = RPC_TASK_ASYNC,
1427 int status = -ENOMEM;
1429 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1430 if (calldata == NULL)
1432 calldata->inode = state->inode;
1433 calldata->state = state;
1434 calldata->arg.fh = NFS_FH(state->inode);
1435 calldata->arg.stateid = &state->open_stateid;
1436 /* Serialization for the sequence id */
1437 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1438 if (calldata->arg.seqid == NULL)
1439 goto out_free_calldata;
1440 calldata->arg.fmode = 0;
1441 calldata->arg.bitmask = server->attr_bitmask;
1442 calldata->res.fattr = &calldata->fattr;
1443 calldata->res.seqid = calldata->arg.seqid;
1444 calldata->res.server = server;
1445 calldata->path.mnt = mntget(path->mnt);
1446 calldata->path.dentry = dget(path->dentry);
1448 msg.rpc_argp = &calldata->arg,
1449 msg.rpc_resp = &calldata->res,
1450 task_setup_data.callback_data = calldata;
1451 task = rpc_run_task(&task_setup_data);
1453 return PTR_ERR(task);
1456 status = rpc_wait_for_completion_task(task);
1462 nfs4_put_open_state(state);
1463 nfs4_put_state_owner(sp);
1467 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1472 /* If the open_intent is for execute, we have an extra check to make */
1473 if (fmode & FMODE_EXEC) {
1474 ret = nfs_may_open(state->inode,
1475 state->owner->so_cred,
1476 nd->intent.open.flags);
1480 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1481 if (!IS_ERR(filp)) {
1482 struct nfs_open_context *ctx;
1483 ctx = nfs_file_open_context(filp);
1487 ret = PTR_ERR(filp);
1489 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1494 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1496 struct path path = {
1497 .mnt = nd->path.mnt,
1500 struct dentry *parent;
1502 struct rpc_cred *cred;
1503 struct nfs4_state *state;
1505 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1507 if (nd->flags & LOOKUP_CREATE) {
1508 attr.ia_mode = nd->intent.open.create_mode;
1509 attr.ia_valid = ATTR_MODE;
1510 if (!IS_POSIXACL(dir))
1511 attr.ia_mode &= ~current->fs->umask;
1514 BUG_ON(nd->intent.open.flags & O_CREAT);
1517 cred = rpc_lookup_cred();
1519 return (struct dentry *)cred;
1520 parent = dentry->d_parent;
1521 /* Protect against concurrent sillydeletes */
1522 nfs_block_sillyrename(parent);
1523 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1525 if (IS_ERR(state)) {
1526 if (PTR_ERR(state) == -ENOENT) {
1527 d_add(dentry, NULL);
1528 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1530 nfs_unblock_sillyrename(parent);
1531 return (struct dentry *)state;
1533 res = d_add_unique(dentry, igrab(state->inode));
1536 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1537 nfs_unblock_sillyrename(parent);
1538 nfs4_intent_set_file(nd, &path, state, fmode);
1543 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1545 struct path path = {
1546 .mnt = nd->path.mnt,
1549 struct rpc_cred *cred;
1550 struct nfs4_state *state;
1551 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1553 cred = rpc_lookup_cred();
1555 return PTR_ERR(cred);
1556 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1558 if (IS_ERR(state)) {
1559 switch (PTR_ERR(state)) {
1565 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1571 if (state->inode == dentry->d_inode) {
1572 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1573 nfs4_intent_set_file(nd, &path, state, fmode);
1576 nfs4_close_sync(&path, state, fmode);
1583 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1585 struct nfs4_server_caps_res res = {};
1586 struct rpc_message msg = {
1587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1588 .rpc_argp = fhandle,
1593 status = rpc_call_sync(server->client, &msg, 0);
1595 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1596 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1597 server->caps |= NFS_CAP_ACLS;
1598 if (res.has_links != 0)
1599 server->caps |= NFS_CAP_HARDLINKS;
1600 if (res.has_symlinks != 0)
1601 server->caps |= NFS_CAP_SYMLINKS;
1602 server->acl_bitmask = res.acl_bitmask;
1607 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1609 struct nfs4_exception exception = { };
1612 err = nfs4_handle_exception(server,
1613 _nfs4_server_capabilities(server, fhandle),
1615 } while (exception.retry);
1619 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1620 struct nfs_fsinfo *info)
1622 struct nfs4_lookup_root_arg args = {
1623 .bitmask = nfs4_fattr_bitmap,
1625 struct nfs4_lookup_res res = {
1627 .fattr = info->fattr,
1630 struct rpc_message msg = {
1631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1635 nfs_fattr_init(info->fattr);
1636 return rpc_call_sync(server->client, &msg, 0);
1639 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1640 struct nfs_fsinfo *info)
1642 struct nfs4_exception exception = { };
1645 err = nfs4_handle_exception(server,
1646 _nfs4_lookup_root(server, fhandle, info),
1648 } while (exception.retry);
1653 * get the file handle for the "/" directory on the server
1655 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1656 struct nfs_fsinfo *info)
1660 status = nfs4_lookup_root(server, fhandle, info);
1662 status = nfs4_server_capabilities(server, fhandle);
1664 status = nfs4_do_fsinfo(server, fhandle, info);
1665 return nfs4_map_errors(status);
1669 * Get locations and (maybe) other attributes of a referral.
1670 * Note that we'll actually follow the referral later when
1671 * we detect fsid mismatch in inode revalidation
1673 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1675 int status = -ENOMEM;
1676 struct page *page = NULL;
1677 struct nfs4_fs_locations *locations = NULL;
1679 page = alloc_page(GFP_KERNEL);
1682 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1683 if (locations == NULL)
1686 status = nfs4_proc_fs_locations(dir, name, locations, page);
1689 /* Make sure server returned a different fsid for the referral */
1690 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1691 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1696 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1697 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1699 fattr->mode = S_IFDIR;
1700 memset(fhandle, 0, sizeof(struct nfs_fh));
1709 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1711 struct nfs4_getattr_arg args = {
1713 .bitmask = server->attr_bitmask,
1715 struct nfs4_getattr_res res = {
1719 struct rpc_message msg = {
1720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1725 nfs_fattr_init(fattr);
1726 return rpc_call_sync(server->client, &msg, 0);
1729 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1731 struct nfs4_exception exception = { };
1734 err = nfs4_handle_exception(server,
1735 _nfs4_proc_getattr(server, fhandle, fattr),
1737 } while (exception.retry);
1742 * The file is not closed if it is opened due to the a request to change
1743 * the size of the file. The open call will not be needed once the
1744 * VFS layer lookup-intents are implemented.
1746 * Close is called when the inode is destroyed.
1747 * If we haven't opened the file for O_WRONLY, we
1748 * need to in the size_change case to obtain a stateid.
1751 * Because OPEN is always done by name in nfsv4, it is
1752 * possible that we opened a different file by the same
1753 * name. We can recognize this race condition, but we
1754 * can't do anything about it besides returning an error.
1756 * This will be fixed with VFS changes (lookup-intent).
1759 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1760 struct iattr *sattr)
1762 struct inode *inode = dentry->d_inode;
1763 struct rpc_cred *cred = NULL;
1764 struct nfs4_state *state = NULL;
1767 nfs_fattr_init(fattr);
1769 /* Search for an existing open(O_WRITE) file */
1770 if (sattr->ia_valid & ATTR_FILE) {
1771 struct nfs_open_context *ctx;
1773 ctx = nfs_file_open_context(sattr->ia_file);
1780 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1782 nfs_setattr_update_inode(inode, sattr);
1786 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1787 const struct qstr *name, struct nfs_fh *fhandle,
1788 struct nfs_fattr *fattr)
1791 struct nfs4_lookup_arg args = {
1792 .bitmask = server->attr_bitmask,
1796 struct nfs4_lookup_res res = {
1801 struct rpc_message msg = {
1802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1807 nfs_fattr_init(fattr);
1809 dprintk("NFS call lookupfh %s\n", name->name);
1810 status = rpc_call_sync(server->client, &msg, 0);
1811 dprintk("NFS reply lookupfh: %d\n", status);
1815 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1816 struct qstr *name, struct nfs_fh *fhandle,
1817 struct nfs_fattr *fattr)
1819 struct nfs4_exception exception = { };
1822 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1824 if (err == -NFS4ERR_MOVED) {
1828 err = nfs4_handle_exception(server, err, &exception);
1829 } while (exception.retry);
1833 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1834 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1838 dprintk("NFS call lookup %s\n", name->name);
1839 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1840 if (status == -NFS4ERR_MOVED)
1841 status = nfs4_get_referral(dir, name, fattr, fhandle);
1842 dprintk("NFS reply lookup: %d\n", status);
1846 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1848 struct nfs4_exception exception = { };
1851 err = nfs4_handle_exception(NFS_SERVER(dir),
1852 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1854 } while (exception.retry);
1858 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1860 struct nfs_server *server = NFS_SERVER(inode);
1861 struct nfs_fattr fattr;
1862 struct nfs4_accessargs args = {
1863 .fh = NFS_FH(inode),
1864 .bitmask = server->attr_bitmask,
1866 struct nfs4_accessres res = {
1870 struct rpc_message msg = {
1871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1874 .rpc_cred = entry->cred,
1876 int mode = entry->mask;
1880 * Determine which access bits we want to ask for...
1882 if (mode & MAY_READ)
1883 args.access |= NFS4_ACCESS_READ;
1884 if (S_ISDIR(inode->i_mode)) {
1885 if (mode & MAY_WRITE)
1886 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1887 if (mode & MAY_EXEC)
1888 args.access |= NFS4_ACCESS_LOOKUP;
1890 if (mode & MAY_WRITE)
1891 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1892 if (mode & MAY_EXEC)
1893 args.access |= NFS4_ACCESS_EXECUTE;
1895 nfs_fattr_init(&fattr);
1896 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1899 if (res.access & NFS4_ACCESS_READ)
1900 entry->mask |= MAY_READ;
1901 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1902 entry->mask |= MAY_WRITE;
1903 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1904 entry->mask |= MAY_EXEC;
1905 nfs_refresh_inode(inode, &fattr);
1910 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1912 struct nfs4_exception exception = { };
1915 err = nfs4_handle_exception(NFS_SERVER(inode),
1916 _nfs4_proc_access(inode, entry),
1918 } while (exception.retry);
1923 * TODO: For the time being, we don't try to get any attributes
1924 * along with any of the zero-copy operations READ, READDIR,
1927 * In the case of the first three, we want to put the GETATTR
1928 * after the read-type operation -- this is because it is hard
1929 * to predict the length of a GETATTR response in v4, and thus
1930 * align the READ data correctly. This means that the GETATTR
1931 * may end up partially falling into the page cache, and we should
1932 * shift it into the 'tail' of the xdr_buf before processing.
1933 * To do this efficiently, we need to know the total length
1934 * of data received, which doesn't seem to be available outside
1937 * In the case of WRITE, we also want to put the GETATTR after
1938 * the operation -- in this case because we want to make sure
1939 * we get the post-operation mtime and size. This means that
1940 * we can't use xdr_encode_pages() as written: we need a variant
1941 * of it which would leave room in the 'tail' iovec.
1943 * Both of these changes to the XDR layer would in fact be quite
1944 * minor, but I decided to leave them for a subsequent patch.
1946 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1947 unsigned int pgbase, unsigned int pglen)
1949 struct nfs4_readlink args = {
1950 .fh = NFS_FH(inode),
1955 struct rpc_message msg = {
1956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1961 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1964 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1965 unsigned int pgbase, unsigned int pglen)
1967 struct nfs4_exception exception = { };
1970 err = nfs4_handle_exception(NFS_SERVER(inode),
1971 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1973 } while (exception.retry);
1979 * We will need to arrange for the VFS layer to provide an atomic open.
1980 * Until then, this create/open method is prone to inefficiency and race
1981 * conditions due to the lookup, create, and open VFS calls from sys_open()
1982 * placed on the wire.
1984 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1985 * The file will be opened again in the subsequent VFS open call
1986 * (nfs4_proc_file_open).
1988 * The open for read will just hang around to be used by any process that
1989 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1993 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1994 int flags, struct nameidata *nd)
1996 struct path path = {
1997 .mnt = nd->path.mnt,
2000 struct nfs4_state *state;
2001 struct rpc_cred *cred;
2002 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2005 cred = rpc_lookup_cred();
2007 status = PTR_ERR(cred);
2010 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2012 if (IS_ERR(state)) {
2013 status = PTR_ERR(state);
2016 d_add(dentry, igrab(state->inode));
2017 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2018 if (flags & O_EXCL) {
2019 struct nfs_fattr fattr;
2020 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2022 nfs_setattr_update_inode(state->inode, sattr);
2023 nfs_post_op_update_inode(state->inode, &fattr);
2025 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2026 status = nfs4_intent_set_file(nd, &path, state, fmode);
2028 nfs4_close_sync(&path, state, fmode);
2035 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2037 struct nfs_server *server = NFS_SERVER(dir);
2038 struct nfs_removeargs args = {
2040 .name.len = name->len,
2041 .name.name = name->name,
2042 .bitmask = server->attr_bitmask,
2044 struct nfs_removeres res = {
2047 struct rpc_message msg = {
2048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2054 nfs_fattr_init(&res.dir_attr);
2055 status = rpc_call_sync(server->client, &msg, 0);
2057 update_changeattr(dir, &res.cinfo);
2058 nfs_post_op_update_inode(dir, &res.dir_attr);
2063 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2065 struct nfs4_exception exception = { };
2068 err = nfs4_handle_exception(NFS_SERVER(dir),
2069 _nfs4_proc_remove(dir, name),
2071 } while (exception.retry);
2075 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2077 struct nfs_server *server = NFS_SERVER(dir);
2078 struct nfs_removeargs *args = msg->rpc_argp;
2079 struct nfs_removeres *res = msg->rpc_resp;
2081 args->bitmask = server->attr_bitmask;
2082 res->server = server;
2083 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2086 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2088 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2090 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2092 update_changeattr(dir, &res->cinfo);
2093 nfs_post_op_update_inode(dir, &res->dir_attr);
2097 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2098 struct inode *new_dir, struct qstr *new_name)
2100 struct nfs_server *server = NFS_SERVER(old_dir);
2101 struct nfs4_rename_arg arg = {
2102 .old_dir = NFS_FH(old_dir),
2103 .new_dir = NFS_FH(new_dir),
2104 .old_name = old_name,
2105 .new_name = new_name,
2106 .bitmask = server->attr_bitmask,
2108 struct nfs_fattr old_fattr, new_fattr;
2109 struct nfs4_rename_res res = {
2111 .old_fattr = &old_fattr,
2112 .new_fattr = &new_fattr,
2114 struct rpc_message msg = {
2115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2121 nfs_fattr_init(res.old_fattr);
2122 nfs_fattr_init(res.new_fattr);
2123 status = rpc_call_sync(server->client, &msg, 0);
2126 update_changeattr(old_dir, &res.old_cinfo);
2127 nfs_post_op_update_inode(old_dir, res.old_fattr);
2128 update_changeattr(new_dir, &res.new_cinfo);
2129 nfs_post_op_update_inode(new_dir, res.new_fattr);
2134 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2135 struct inode *new_dir, struct qstr *new_name)
2137 struct nfs4_exception exception = { };
2140 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2141 _nfs4_proc_rename(old_dir, old_name,
2144 } while (exception.retry);
2148 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2150 struct nfs_server *server = NFS_SERVER(inode);
2151 struct nfs4_link_arg arg = {
2152 .fh = NFS_FH(inode),
2153 .dir_fh = NFS_FH(dir),
2155 .bitmask = server->attr_bitmask,
2157 struct nfs_fattr fattr, dir_attr;
2158 struct nfs4_link_res res = {
2161 .dir_attr = &dir_attr,
2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2170 nfs_fattr_init(res.fattr);
2171 nfs_fattr_init(res.dir_attr);
2172 status = rpc_call_sync(server->client, &msg, 0);
2174 update_changeattr(dir, &res.cinfo);
2175 nfs_post_op_update_inode(dir, res.dir_attr);
2176 nfs_post_op_update_inode(inode, res.fattr);
2182 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2184 struct nfs4_exception exception = { };
2187 err = nfs4_handle_exception(NFS_SERVER(inode),
2188 _nfs4_proc_link(inode, dir, name),
2190 } while (exception.retry);
2194 struct nfs4_createdata {
2195 struct rpc_message msg;
2196 struct nfs4_create_arg arg;
2197 struct nfs4_create_res res;
2199 struct nfs_fattr fattr;
2200 struct nfs_fattr dir_fattr;
2203 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2204 struct qstr *name, struct iattr *sattr, u32 ftype)
2206 struct nfs4_createdata *data;
2208 data = kzalloc(sizeof(*data), GFP_KERNEL);
2210 struct nfs_server *server = NFS_SERVER(dir);
2212 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2213 data->msg.rpc_argp = &data->arg;
2214 data->msg.rpc_resp = &data->res;
2215 data->arg.dir_fh = NFS_FH(dir);
2216 data->arg.server = server;
2217 data->arg.name = name;
2218 data->arg.attrs = sattr;
2219 data->arg.ftype = ftype;
2220 data->arg.bitmask = server->attr_bitmask;
2221 data->res.server = server;
2222 data->res.fh = &data->fh;
2223 data->res.fattr = &data->fattr;
2224 data->res.dir_fattr = &data->dir_fattr;
2225 nfs_fattr_init(data->res.fattr);
2226 nfs_fattr_init(data->res.dir_fattr);
2231 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2233 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2235 update_changeattr(dir, &data->res.dir_cinfo);
2236 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2237 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2242 static void nfs4_free_createdata(struct nfs4_createdata *data)
2247 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2248 struct page *page, unsigned int len, struct iattr *sattr)
2250 struct nfs4_createdata *data;
2251 int status = -ENAMETOOLONG;
2253 if (len > NFS4_MAXPATHLEN)
2257 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2261 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2262 data->arg.u.symlink.pages = &page;
2263 data->arg.u.symlink.len = len;
2265 status = nfs4_do_create(dir, dentry, data);
2267 nfs4_free_createdata(data);
2272 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2273 struct page *page, unsigned int len, struct iattr *sattr)
2275 struct nfs4_exception exception = { };
2278 err = nfs4_handle_exception(NFS_SERVER(dir),
2279 _nfs4_proc_symlink(dir, dentry, page,
2282 } while (exception.retry);
2286 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2287 struct iattr *sattr)
2289 struct nfs4_createdata *data;
2290 int status = -ENOMEM;
2292 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2296 status = nfs4_do_create(dir, dentry, data);
2298 nfs4_free_createdata(data);
2303 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2304 struct iattr *sattr)
2306 struct nfs4_exception exception = { };
2309 err = nfs4_handle_exception(NFS_SERVER(dir),
2310 _nfs4_proc_mkdir(dir, dentry, sattr),
2312 } while (exception.retry);
2316 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2317 u64 cookie, struct page *page, unsigned int count, int plus)
2319 struct inode *dir = dentry->d_inode;
2320 struct nfs4_readdir_arg args = {
2325 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2327 struct nfs4_readdir_res res;
2328 struct rpc_message msg = {
2329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2336 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2337 dentry->d_parent->d_name.name,
2338 dentry->d_name.name,
2339 (unsigned long long)cookie);
2340 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2341 res.pgbase = args.pgbase;
2342 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2344 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2346 nfs_invalidate_atime(dir);
2348 dprintk("%s: returns %d\n", __func__, status);
2352 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2353 u64 cookie, struct page *page, unsigned int count, int plus)
2355 struct nfs4_exception exception = { };
2358 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2359 _nfs4_proc_readdir(dentry, cred, cookie,
2362 } while (exception.retry);
2366 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2367 struct iattr *sattr, dev_t rdev)
2369 struct nfs4_createdata *data;
2370 int mode = sattr->ia_mode;
2371 int status = -ENOMEM;
2373 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2374 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2376 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2381 data->arg.ftype = NF4FIFO;
2382 else if (S_ISBLK(mode)) {
2383 data->arg.ftype = NF4BLK;
2384 data->arg.u.device.specdata1 = MAJOR(rdev);
2385 data->arg.u.device.specdata2 = MINOR(rdev);
2387 else if (S_ISCHR(mode)) {
2388 data->arg.ftype = NF4CHR;
2389 data->arg.u.device.specdata1 = MAJOR(rdev);
2390 data->arg.u.device.specdata2 = MINOR(rdev);
2393 status = nfs4_do_create(dir, dentry, data);
2395 nfs4_free_createdata(data);
2400 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2401 struct iattr *sattr, dev_t rdev)
2403 struct nfs4_exception exception = { };
2406 err = nfs4_handle_exception(NFS_SERVER(dir),
2407 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2409 } while (exception.retry);
2413 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2414 struct nfs_fsstat *fsstat)
2416 struct nfs4_statfs_arg args = {
2418 .bitmask = server->attr_bitmask,
2420 struct rpc_message msg = {
2421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2426 nfs_fattr_init(fsstat->fattr);
2427 return rpc_call_sync(server->client, &msg, 0);
2430 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2432 struct nfs4_exception exception = { };
2435 err = nfs4_handle_exception(server,
2436 _nfs4_proc_statfs(server, fhandle, fsstat),
2438 } while (exception.retry);
2442 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2443 struct nfs_fsinfo *fsinfo)
2445 struct nfs4_fsinfo_arg args = {
2447 .bitmask = server->attr_bitmask,
2449 struct rpc_message msg = {
2450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2455 return rpc_call_sync(server->client, &msg, 0);
2458 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2460 struct nfs4_exception exception = { };
2464 err = nfs4_handle_exception(server,
2465 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2467 } while (exception.retry);
2471 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2473 nfs_fattr_init(fsinfo->fattr);
2474 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2477 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2478 struct nfs_pathconf *pathconf)
2480 struct nfs4_pathconf_arg args = {
2482 .bitmask = server->attr_bitmask,
2484 struct rpc_message msg = {
2485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2487 .rpc_resp = pathconf,
2490 /* None of the pathconf attributes are mandatory to implement */
2491 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2492 memset(pathconf, 0, sizeof(*pathconf));
2496 nfs_fattr_init(pathconf->fattr);
2497 return rpc_call_sync(server->client, &msg, 0);
2500 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2501 struct nfs_pathconf *pathconf)
2503 struct nfs4_exception exception = { };
2507 err = nfs4_handle_exception(server,
2508 _nfs4_proc_pathconf(server, fhandle, pathconf),
2510 } while (exception.retry);
2514 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2516 struct nfs_server *server = NFS_SERVER(data->inode);
2518 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2519 rpc_restart_call(task);
2523 nfs_invalidate_atime(data->inode);
2524 if (task->tk_status > 0)
2525 renew_lease(server, data->timestamp);
2529 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2531 data->timestamp = jiffies;
2532 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2535 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2537 struct inode *inode = data->inode;
2539 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2540 rpc_restart_call(task);
2543 if (task->tk_status >= 0) {
2544 renew_lease(NFS_SERVER(inode), data->timestamp);
2545 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2550 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2552 struct nfs_server *server = NFS_SERVER(data->inode);
2554 data->args.bitmask = server->attr_bitmask;
2555 data->res.server = server;
2556 data->timestamp = jiffies;
2558 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2561 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2563 struct inode *inode = data->inode;
2565 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2566 rpc_restart_call(task);
2569 nfs_refresh_inode(inode, data->res.fattr);
2573 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2575 struct nfs_server *server = NFS_SERVER(data->inode);
2577 data->args.bitmask = server->attr_bitmask;
2578 data->res.server = server;
2579 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2583 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2584 * standalone procedure for queueing an asynchronous RENEW.
2586 static void nfs4_renew_done(struct rpc_task *task, void *data)
2588 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2589 unsigned long timestamp = (unsigned long)data;
2591 if (task->tk_status < 0) {
2592 switch (task->tk_status) {
2593 case -NFS4ERR_STALE_CLIENTID:
2594 case -NFS4ERR_EXPIRED:
2595 case -NFS4ERR_CB_PATH_DOWN:
2596 nfs4_schedule_state_recovery(clp);
2600 spin_lock(&clp->cl_lock);
2601 if (time_before(clp->cl_last_renewal,timestamp))
2602 clp->cl_last_renewal = timestamp;
2603 spin_unlock(&clp->cl_lock);
2606 static const struct rpc_call_ops nfs4_renew_ops = {
2607 .rpc_call_done = nfs4_renew_done,
2610 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2612 struct rpc_message msg = {
2613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2618 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2619 &nfs4_renew_ops, (void *)jiffies);
2622 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2624 struct rpc_message msg = {
2625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2629 unsigned long now = jiffies;
2632 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2635 spin_lock(&clp->cl_lock);
2636 if (time_before(clp->cl_last_renewal,now))
2637 clp->cl_last_renewal = now;
2638 spin_unlock(&clp->cl_lock);
2642 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2644 return (server->caps & NFS_CAP_ACLS)
2645 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2646 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2649 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2650 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2653 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2655 static void buf_to_pages(const void *buf, size_t buflen,
2656 struct page **pages, unsigned int *pgbase)
2658 const void *p = buf;
2660 *pgbase = offset_in_page(buf);
2662 while (p < buf + buflen) {
2663 *(pages++) = virt_to_page(p);
2664 p += PAGE_CACHE_SIZE;
2668 struct nfs4_cached_acl {
2674 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2676 struct nfs_inode *nfsi = NFS_I(inode);
2678 spin_lock(&inode->i_lock);
2679 kfree(nfsi->nfs4_acl);
2680 nfsi->nfs4_acl = acl;
2681 spin_unlock(&inode->i_lock);
2684 static void nfs4_zap_acl_attr(struct inode *inode)
2686 nfs4_set_cached_acl(inode, NULL);
2689 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2691 struct nfs_inode *nfsi = NFS_I(inode);
2692 struct nfs4_cached_acl *acl;
2695 spin_lock(&inode->i_lock);
2696 acl = nfsi->nfs4_acl;
2699 if (buf == NULL) /* user is just asking for length */
2701 if (acl->cached == 0)
2703 ret = -ERANGE; /* see getxattr(2) man page */
2704 if (acl->len > buflen)
2706 memcpy(buf, acl->data, acl->len);
2710 spin_unlock(&inode->i_lock);
2714 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2716 struct nfs4_cached_acl *acl;
2718 if (buf && acl_len <= PAGE_SIZE) {
2719 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2723 memcpy(acl->data, buf, acl_len);
2725 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2732 nfs4_set_cached_acl(inode, acl);
2735 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2737 struct page *pages[NFS4ACL_MAXPAGES];
2738 struct nfs_getaclargs args = {
2739 .fh = NFS_FH(inode),
2743 size_t resp_len = buflen;
2745 struct rpc_message msg = {
2746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2748 .rpc_resp = &resp_len,
2750 struct page *localpage = NULL;
2753 if (buflen < PAGE_SIZE) {
2754 /* As long as we're doing a round trip to the server anyway,
2755 * let's be prepared for a page of acl data. */
2756 localpage = alloc_page(GFP_KERNEL);
2757 resp_buf = page_address(localpage);
2758 if (localpage == NULL)
2760 args.acl_pages[0] = localpage;
2761 args.acl_pgbase = 0;
2762 resp_len = args.acl_len = PAGE_SIZE;
2765 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2767 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2770 if (resp_len > args.acl_len)
2771 nfs4_write_cached_acl(inode, NULL, resp_len);
2773 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2776 if (resp_len > buflen)
2779 memcpy(buf, resp_buf, resp_len);
2784 __free_page(localpage);
2788 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2790 struct nfs4_exception exception = { };
2793 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2796 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2797 } while (exception.retry);
2801 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2803 struct nfs_server *server = NFS_SERVER(inode);
2806 if (!nfs4_server_supports_acls(server))
2808 ret = nfs_revalidate_inode(server, inode);
2811 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2812 nfs_zap_acl_cache(inode);
2813 ret = nfs4_read_cached_acl(inode, buf, buflen);
2816 return nfs4_get_acl_uncached(inode, buf, buflen);
2819 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2821 struct nfs_server *server = NFS_SERVER(inode);
2822 struct page *pages[NFS4ACL_MAXPAGES];
2823 struct nfs_setaclargs arg = {
2824 .fh = NFS_FH(inode),
2828 struct rpc_message msg = {
2829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2835 if (!nfs4_server_supports_acls(server))
2837 nfs_inode_return_delegation(inode);
2838 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2839 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2840 nfs_access_zap_cache(inode);
2841 nfs_zap_acl_cache(inode);
2845 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2847 struct nfs4_exception exception = { };
2850 err = nfs4_handle_exception(NFS_SERVER(inode),
2851 __nfs4_proc_set_acl(inode, buf, buflen),
2853 } while (exception.retry);
2858 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
2860 struct nfs_client *clp = server->nfs_client;
2862 if (!clp || task->tk_status >= 0)
2864 switch(task->tk_status) {
2865 case -NFS4ERR_ADMIN_REVOKED:
2866 case -NFS4ERR_BAD_STATEID:
2867 case -NFS4ERR_OPENMODE:
2870 nfs4_state_mark_reclaim_nograce(clp, state);
2871 case -NFS4ERR_STALE_CLIENTID:
2872 case -NFS4ERR_STALE_STATEID:
2873 case -NFS4ERR_EXPIRED:
2874 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2875 nfs4_schedule_state_recovery(clp);
2876 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
2877 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2878 task->tk_status = 0;
2880 case -NFS4ERR_DELAY:
2881 nfs_inc_server_stats(server, NFSIOS_DELAY);
2882 case -NFS4ERR_GRACE:
2883 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2884 task->tk_status = 0;
2886 case -NFS4ERR_OLD_STATEID:
2887 task->tk_status = 0;
2890 task->tk_status = nfs4_map_errors(task->tk_status);
2894 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2896 nfs4_verifier sc_verifier;
2897 struct nfs4_setclientid setclientid = {
2898 .sc_verifier = &sc_verifier,
2901 struct rpc_message msg = {
2902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2903 .rpc_argp = &setclientid,
2911 p = (__be32*)sc_verifier.data;
2912 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2913 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2916 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2917 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2919 rpc_peeraddr2str(clp->cl_rpcclient,
2921 rpc_peeraddr2str(clp->cl_rpcclient,
2923 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2924 clp->cl_id_uniquifier);
2925 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2926 sizeof(setclientid.sc_netid),
2927 rpc_peeraddr2str(clp->cl_rpcclient,
2928 RPC_DISPLAY_NETID));
2929 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2930 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2931 clp->cl_ipaddr, port >> 8, port & 255);
2933 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2934 if (status != -NFS4ERR_CLID_INUSE)
2939 ssleep(clp->cl_lease_time + 1);
2941 if (++clp->cl_id_uniquifier == 0)
2947 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2949 struct nfs_fsinfo fsinfo;
2950 struct rpc_message msg = {
2951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2953 .rpc_resp = &fsinfo,
2960 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2962 spin_lock(&clp->cl_lock);
2963 clp->cl_lease_time = fsinfo.lease_time * HZ;
2964 clp->cl_last_renewal = now;
2965 spin_unlock(&clp->cl_lock);
2970 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2975 err = _nfs4_proc_setclientid_confirm(clp, cred);
2979 case -NFS4ERR_RESOURCE:
2980 /* The IBM lawyers misread another document! */
2981 case -NFS4ERR_DELAY:
2982 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2988 struct nfs4_delegreturndata {
2989 struct nfs4_delegreturnargs args;
2990 struct nfs4_delegreturnres res;
2992 nfs4_stateid stateid;
2993 unsigned long timestamp;
2994 struct nfs_fattr fattr;
2998 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3000 struct nfs4_delegreturndata *data = calldata;
3001 data->rpc_status = task->tk_status;
3002 if (data->rpc_status == 0)
3003 renew_lease(data->res.server, data->timestamp);
3006 static void nfs4_delegreturn_release(void *calldata)
3011 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3012 .rpc_call_done = nfs4_delegreturn_done,
3013 .rpc_release = nfs4_delegreturn_release,
3016 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3018 struct nfs4_delegreturndata *data;
3019 struct nfs_server *server = NFS_SERVER(inode);
3020 struct rpc_task *task;
3021 struct rpc_message msg = {
3022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3025 struct rpc_task_setup task_setup_data = {
3026 .rpc_client = server->client,
3027 .rpc_message = &msg,
3028 .callback_ops = &nfs4_delegreturn_ops,
3029 .flags = RPC_TASK_ASYNC,
3033 data = kmalloc(sizeof(*data), GFP_KERNEL);
3036 data->args.fhandle = &data->fh;
3037 data->args.stateid = &data->stateid;
3038 data->args.bitmask = server->attr_bitmask;
3039 nfs_copy_fh(&data->fh, NFS_FH(inode));
3040 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3041 data->res.fattr = &data->fattr;
3042 data->res.server = server;
3043 nfs_fattr_init(data->res.fattr);
3044 data->timestamp = jiffies;
3045 data->rpc_status = 0;
3047 task_setup_data.callback_data = data;
3048 msg.rpc_argp = &data->args,
3049 msg.rpc_resp = &data->res,
3050 task = rpc_run_task(&task_setup_data);
3052 return PTR_ERR(task);
3055 status = nfs4_wait_for_completion_rpc_task(task);
3058 status = data->rpc_status;
3061 nfs_refresh_inode(inode, &data->fattr);
3067 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3069 struct nfs_server *server = NFS_SERVER(inode);
3070 struct nfs4_exception exception = { };
3073 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3075 case -NFS4ERR_STALE_STATEID:
3076 case -NFS4ERR_EXPIRED:
3080 err = nfs4_handle_exception(server, err, &exception);
3081 } while (exception.retry);
3085 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3086 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3089 * sleep, with exponential backoff, and retry the LOCK operation.
3091 static unsigned long
3092 nfs4_set_lock_task_retry(unsigned long timeout)
3094 schedule_timeout_killable(timeout);
3096 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3097 return NFS4_LOCK_MAXTIMEOUT;
3101 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3103 struct inode *inode = state->inode;
3104 struct nfs_server *server = NFS_SERVER(inode);
3105 struct nfs_client *clp = server->nfs_client;
3106 struct nfs_lockt_args arg = {
3107 .fh = NFS_FH(inode),
3110 struct nfs_lockt_res res = {
3113 struct rpc_message msg = {
3114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3117 .rpc_cred = state->owner->so_cred,
3119 struct nfs4_lock_state *lsp;
3122 arg.lock_owner.clientid = clp->cl_clientid;
3123 status = nfs4_set_lock_state(state, request);
3126 lsp = request->fl_u.nfs4_fl.owner;
3127 arg.lock_owner.id = lsp->ls_id.id;
3128 status = rpc_call_sync(server->client, &msg, 0);
3131 request->fl_type = F_UNLCK;
3133 case -NFS4ERR_DENIED:
3136 request->fl_ops->fl_release_private(request);
3141 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3143 struct nfs4_exception exception = { };
3147 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3148 _nfs4_proc_getlk(state, cmd, request),
3150 } while (exception.retry);
3154 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3157 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3159 res = posix_lock_file_wait(file, fl);
3162 res = flock_lock_file_wait(file, fl);
3170 struct nfs4_unlockdata {
3171 struct nfs_locku_args arg;
3172 struct nfs_locku_res res;
3173 struct nfs4_lock_state *lsp;
3174 struct nfs_open_context *ctx;
3175 struct file_lock fl;
3176 const struct nfs_server *server;
3177 unsigned long timestamp;
3180 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3181 struct nfs_open_context *ctx,
3182 struct nfs4_lock_state *lsp,
3183 struct nfs_seqid *seqid)
3185 struct nfs4_unlockdata *p;
3186 struct inode *inode = lsp->ls_state->inode;
3188 p = kmalloc(sizeof(*p), GFP_KERNEL);
3191 p->arg.fh = NFS_FH(inode);
3193 p->arg.seqid = seqid;
3194 p->res.seqid = seqid;
3195 p->arg.stateid = &lsp->ls_stateid;
3197 atomic_inc(&lsp->ls_count);
3198 /* Ensure we don't close file until we're done freeing locks! */
3199 p->ctx = get_nfs_open_context(ctx);
3200 memcpy(&p->fl, fl, sizeof(p->fl));
3201 p->server = NFS_SERVER(inode);
3205 static void nfs4_locku_release_calldata(void *data)
3207 struct nfs4_unlockdata *calldata = data;
3208 nfs_free_seqid(calldata->arg.seqid);
3209 nfs4_put_lock_state(calldata->lsp);
3210 put_nfs_open_context(calldata->ctx);
3214 static void nfs4_locku_done(struct rpc_task *task, void *data)
3216 struct nfs4_unlockdata *calldata = data;
3218 if (RPC_ASSASSINATED(task))
3220 switch (task->tk_status) {
3222 memcpy(calldata->lsp->ls_stateid.data,
3223 calldata->res.stateid.data,
3224 sizeof(calldata->lsp->ls_stateid.data));
3225 renew_lease(calldata->server, calldata->timestamp);
3227 case -NFS4ERR_BAD_STATEID:
3228 case -NFS4ERR_OLD_STATEID:
3229 case -NFS4ERR_STALE_STATEID:
3230 case -NFS4ERR_EXPIRED:
3233 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3234 rpc_restart_call(task);
3238 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3240 struct nfs4_unlockdata *calldata = data;
3242 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3244 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3245 /* Note: exit _without_ running nfs4_locku_done */
3246 task->tk_action = NULL;
3249 calldata->timestamp = jiffies;
3250 rpc_call_start(task);
3253 static const struct rpc_call_ops nfs4_locku_ops = {
3254 .rpc_call_prepare = nfs4_locku_prepare,
3255 .rpc_call_done = nfs4_locku_done,
3256 .rpc_release = nfs4_locku_release_calldata,
3259 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3260 struct nfs_open_context *ctx,
3261 struct nfs4_lock_state *lsp,
3262 struct nfs_seqid *seqid)
3264 struct nfs4_unlockdata *data;
3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3267 .rpc_cred = ctx->cred,
3269 struct rpc_task_setup task_setup_data = {
3270 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3271 .rpc_message = &msg,
3272 .callback_ops = &nfs4_locku_ops,
3273 .workqueue = nfsiod_workqueue,
3274 .flags = RPC_TASK_ASYNC,
3277 /* Ensure this is an unlock - when canceling a lock, the
3278 * canceled lock is passed in, and it won't be an unlock.
3280 fl->fl_type = F_UNLCK;
3282 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3284 nfs_free_seqid(seqid);
3285 return ERR_PTR(-ENOMEM);
3288 msg.rpc_argp = &data->arg,
3289 msg.rpc_resp = &data->res,
3290 task_setup_data.callback_data = data;
3291 return rpc_run_task(&task_setup_data);
3294 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3296 struct nfs_inode *nfsi = NFS_I(state->inode);
3297 struct nfs_seqid *seqid;
3298 struct nfs4_lock_state *lsp;
3299 struct rpc_task *task;
3301 unsigned char fl_flags = request->fl_flags;
3303 status = nfs4_set_lock_state(state, request);
3304 /* Unlock _before_ we do the RPC call */
3305 request->fl_flags |= FL_EXISTS;
3306 down_read(&nfsi->rwsem);
3307 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3308 up_read(&nfsi->rwsem);
3311 up_read(&nfsi->rwsem);
3314 /* Is this a delegated lock? */
3315 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3317 lsp = request->fl_u.nfs4_fl.owner;
3318 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3322 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3323 status = PTR_ERR(task);
3326 status = nfs4_wait_for_completion_rpc_task(task);
3329 request->fl_flags = fl_flags;
3333 struct nfs4_lockdata {
3334 struct nfs_lock_args arg;
3335 struct nfs_lock_res res;
3336 struct nfs4_lock_state *lsp;
3337 struct nfs_open_context *ctx;
3338 struct file_lock fl;
3339 unsigned long timestamp;
3344 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3345 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3347 struct nfs4_lockdata *p;
3348 struct inode *inode = lsp->ls_state->inode;
3349 struct nfs_server *server = NFS_SERVER(inode);
3351 p = kzalloc(sizeof(*p), GFP_KERNEL);
3355 p->arg.fh = NFS_FH(inode);
3357 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3358 if (p->arg.open_seqid == NULL)
3360 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3361 if (p->arg.lock_seqid == NULL)
3362 goto out_free_seqid;
3363 p->arg.lock_stateid = &lsp->ls_stateid;
3364 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3365 p->arg.lock_owner.id = lsp->ls_id.id;
3366 p->res.lock_seqid = p->arg.lock_seqid;
3368 atomic_inc(&lsp->ls_count);
3369 p->ctx = get_nfs_open_context(ctx);
3370 memcpy(&p->fl, fl, sizeof(p->fl));
3373 nfs_free_seqid(p->arg.open_seqid);
3379 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3381 struct nfs4_lockdata *data = calldata;
3382 struct nfs4_state *state = data->lsp->ls_state;
3384 dprintk("%s: begin!\n", __func__);
3385 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3387 /* Do we need to do an open_to_lock_owner? */
3388 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3389 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3391 data->arg.open_stateid = &state->stateid;
3392 data->arg.new_lock_owner = 1;
3393 data->res.open_seqid = data->arg.open_seqid;
3395 data->arg.new_lock_owner = 0;
3396 data->timestamp = jiffies;
3397 rpc_call_start(task);
3398 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3401 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3403 struct nfs4_lockdata *data = calldata;
3405 dprintk("%s: begin!\n", __func__);
3407 data->rpc_status = task->tk_status;
3408 if (RPC_ASSASSINATED(task))
3410 if (data->arg.new_lock_owner != 0) {
3411 if (data->rpc_status == 0)
3412 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3416 if (data->rpc_status == 0) {
3417 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3418 sizeof(data->lsp->ls_stateid.data));
3419 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3420 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3423 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3426 static void nfs4_lock_release(void *calldata)
3428 struct nfs4_lockdata *data = calldata;
3430 dprintk("%s: begin!\n", __func__);
3431 nfs_free_seqid(data->arg.open_seqid);
3432 if (data->cancelled != 0) {
3433 struct rpc_task *task;
3434 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3435 data->arg.lock_seqid);
3438 dprintk("%s: cancelling lock!\n", __func__);
3440 nfs_free_seqid(data->arg.lock_seqid);
3441 nfs4_put_lock_state(data->lsp);
3442 put_nfs_open_context(data->ctx);
3444 dprintk("%s: done!\n", __func__);
3447 static const struct rpc_call_ops nfs4_lock_ops = {
3448 .rpc_call_prepare = nfs4_lock_prepare,
3449 .rpc_call_done = nfs4_lock_done,
3450 .rpc_release = nfs4_lock_release,
3453 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3455 struct nfs4_lockdata *data;
3456 struct rpc_task *task;
3457 struct rpc_message msg = {
3458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3459 .rpc_cred = state->owner->so_cred,
3461 struct rpc_task_setup task_setup_data = {
3462 .rpc_client = NFS_CLIENT(state->inode),
3463 .rpc_message = &msg,
3464 .callback_ops = &nfs4_lock_ops,
3465 .workqueue = nfsiod_workqueue,
3466 .flags = RPC_TASK_ASYNC,
3470 dprintk("%s: begin!\n", __func__);
3471 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3472 fl->fl_u.nfs4_fl.owner);
3476 data->arg.block = 1;
3478 data->arg.reclaim = 1;
3479 msg.rpc_argp = &data->arg,
3480 msg.rpc_resp = &data->res,
3481 task_setup_data.callback_data = data;
3482 task = rpc_run_task(&task_setup_data);
3484 return PTR_ERR(task);
3485 ret = nfs4_wait_for_completion_rpc_task(task);
3487 ret = data->rpc_status;
3488 if (ret == -NFS4ERR_DENIED)
3491 data->cancelled = 1;
3493 dprintk("%s: done, ret = %d!\n", __func__, ret);
3497 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3499 struct nfs_server *server = NFS_SERVER(state->inode);
3500 struct nfs4_exception exception = { };
3504 /* Cache the lock if possible... */
3505 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3507 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3508 if (err != -NFS4ERR_DELAY)
3510 nfs4_handle_exception(server, err, &exception);
3511 } while (exception.retry);
3515 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3517 struct nfs_server *server = NFS_SERVER(state->inode);
3518 struct nfs4_exception exception = { };
3521 err = nfs4_set_lock_state(state, request);
3525 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3527 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3528 if (err != -NFS4ERR_DELAY)
3530 nfs4_handle_exception(server, err, &exception);
3531 } while (exception.retry);
3535 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3537 struct nfs_inode *nfsi = NFS_I(state->inode);
3538 unsigned char fl_flags = request->fl_flags;
3541 /* Is this a delegated open? */
3542 status = nfs4_set_lock_state(state, request);
3545 request->fl_flags |= FL_ACCESS;
3546 status = do_vfs_lock(request->fl_file, request);
3549 down_read(&nfsi->rwsem);
3550 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3551 /* Yes: cache locks! */
3552 /* ...but avoid races with delegation recall... */
3553 request->fl_flags = fl_flags & ~FL_SLEEP;
3554 status = do_vfs_lock(request->fl_file, request);
3557 status = _nfs4_do_setlk(state, cmd, request, 0);
3560 /* Note: we always want to sleep here! */
3561 request->fl_flags = fl_flags | FL_SLEEP;
3562 if (do_vfs_lock(request->fl_file, request) < 0)
3563 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3565 up_read(&nfsi->rwsem);
3567 request->fl_flags = fl_flags;
3571 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3573 struct nfs4_exception exception = { };
3577 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3578 _nfs4_proc_setlk(state, cmd, request),
3580 } while (exception.retry);
3585 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3587 struct nfs_open_context *ctx;
3588 struct nfs4_state *state;
3589 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3592 /* verify open state */
3593 ctx = nfs_file_open_context(filp);
3596 if (request->fl_start < 0 || request->fl_end < 0)
3600 return nfs4_proc_getlk(state, F_GETLK, request);
3602 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3605 if (request->fl_type == F_UNLCK)
3606 return nfs4_proc_unlck(state, cmd, request);
3609 status = nfs4_proc_setlk(state, cmd, request);
3610 if ((status != -EAGAIN) || IS_SETLK(cmd))
3612 timeout = nfs4_set_lock_task_retry(timeout);
3613 status = -ERESTARTSYS;
3616 } while(status < 0);
3620 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3622 struct nfs_server *server = NFS_SERVER(state->inode);
3623 struct nfs4_exception exception = { };
3626 err = nfs4_set_lock_state(state, fl);
3630 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3631 if (err != -NFS4ERR_DELAY)
3633 err = nfs4_handle_exception(server, err, &exception);
3634 } while (exception.retry);
3639 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3641 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3642 size_t buflen, int flags)
3644 struct inode *inode = dentry->d_inode;
3646 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3649 return nfs4_proc_set_acl(inode, buf, buflen);
3652 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3653 * and that's what we'll do for e.g. user attributes that haven't been set.
3654 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3655 * attributes in kernel-managed attribute namespaces. */
3656 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3659 struct inode *inode = dentry->d_inode;
3661 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3664 return nfs4_proc_get_acl(inode, buf, buflen);
3667 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3669 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3671 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3673 if (buf && buflen < len)
3676 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3680 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3681 struct nfs4_fs_locations *fs_locations, struct page *page)
3683 struct nfs_server *server = NFS_SERVER(dir);
3685 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3686 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3688 struct nfs4_fs_locations_arg args = {
3689 .dir_fh = NFS_FH(dir),
3694 struct rpc_message msg = {
3695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3697 .rpc_resp = fs_locations,
3701 dprintk("%s: start\n", __func__);
3702 nfs_fattr_init(&fs_locations->fattr);
3703 fs_locations->server = server;
3704 fs_locations->nlocations = 0;
3705 status = rpc_call_sync(server->client, &msg, 0);
3706 dprintk("%s: returned status = %d\n", __func__, status);
3710 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3711 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
3712 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
3713 .recover_open = nfs4_open_reclaim,
3714 .recover_lock = nfs4_lock_reclaim,
3717 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3718 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
3719 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
3720 .recover_open = nfs4_open_expired,
3721 .recover_lock = nfs4_lock_expired,
3724 static const struct inode_operations nfs4_file_inode_operations = {
3725 .permission = nfs_permission,
3726 .getattr = nfs_getattr,
3727 .setattr = nfs_setattr,
3728 .getxattr = nfs4_getxattr,
3729 .setxattr = nfs4_setxattr,
3730 .listxattr = nfs4_listxattr,
3733 const struct nfs_rpc_ops nfs_v4_clientops = {
3734 .version = 4, /* protocol version */
3735 .dentry_ops = &nfs4_dentry_operations,
3736 .dir_inode_ops = &nfs4_dir_inode_operations,
3737 .file_inode_ops = &nfs4_file_inode_operations,
3738 .getroot = nfs4_proc_get_root,
3739 .getattr = nfs4_proc_getattr,
3740 .setattr = nfs4_proc_setattr,
3741 .lookupfh = nfs4_proc_lookupfh,
3742 .lookup = nfs4_proc_lookup,
3743 .access = nfs4_proc_access,
3744 .readlink = nfs4_proc_readlink,
3745 .create = nfs4_proc_create,
3746 .remove = nfs4_proc_remove,
3747 .unlink_setup = nfs4_proc_unlink_setup,
3748 .unlink_done = nfs4_proc_unlink_done,
3749 .rename = nfs4_proc_rename,
3750 .link = nfs4_proc_link,
3751 .symlink = nfs4_proc_symlink,
3752 .mkdir = nfs4_proc_mkdir,
3753 .rmdir = nfs4_proc_remove,
3754 .readdir = nfs4_proc_readdir,
3755 .mknod = nfs4_proc_mknod,
3756 .statfs = nfs4_proc_statfs,
3757 .fsinfo = nfs4_proc_fsinfo,
3758 .pathconf = nfs4_proc_pathconf,
3759 .set_capabilities = nfs4_server_capabilities,
3760 .decode_dirent = nfs4_decode_dirent,
3761 .read_setup = nfs4_proc_read_setup,
3762 .read_done = nfs4_read_done,
3763 .write_setup = nfs4_proc_write_setup,
3764 .write_done = nfs4_write_done,
3765 .commit_setup = nfs4_proc_commit_setup,
3766 .commit_done = nfs4_commit_done,
3767 .lock = nfs4_proc_lock,
3768 .clear_acl_cache = nfs4_zap_acl_attr,