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"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata *data);
63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
65 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
66 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
67 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
68 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 /* Prevent leaks of NFSv4 errors into userland */
71 int nfs4_map_errors(int err)
74 dprintk("%s could not handle NFSv4 error %d\n",
82 * This is our standard bitmap for GETATTR requests.
84 const u32 nfs4_fattr_bitmap[2] = {
89 | FATTR4_WORD0_FILEID,
91 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
101 const u32 nfs4_statfs_bitmap[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
110 const u32 nfs4_pathconf_bitmap[2] = {
112 | FATTR4_WORD0_MAXNAME,
116 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME,
123 const u32 nfs4_fs_locations_bitmap[2] = {
125 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS,
131 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
142 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
143 struct nfs4_readdir_arg *readdir)
147 BUG_ON(readdir->count < 80);
149 readdir->cookie = cookie;
150 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
155 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
166 start = p = kmap_atomic(*readdir->pages, KM_USER0);
169 *p++ = xdr_one; /* next */
170 *p++ = xdr_zero; /* cookie, first word */
171 *p++ = xdr_one; /* cookie, second word */
172 *p++ = xdr_one; /* entry len */
173 memcpy(p, ".\0\0\0", 4); /* entry */
175 *p++ = xdr_one; /* bitmap length */
176 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
177 *p++ = htonl(8); /* attribute buffer length */
178 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_two; /* cookie, second word */
184 *p++ = xdr_two; /* entry len */
185 memcpy(p, "..\0\0", 4); /* entry */
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
192 readdir->pgbase = (char *)p - (char *)start;
193 readdir->count -= readdir->pgbase;
194 kunmap_atomic(start, KM_USER0);
197 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
199 struct nfs_client *clp = server->nfs_client;
200 spin_lock(&clp->cl_lock);
201 if (time_before(clp->cl_last_renewal,timestamp))
202 clp->cl_last_renewal = timestamp;
203 spin_unlock(&clp->cl_lock);
206 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
208 struct nfs_inode *nfsi = NFS_I(dir);
210 spin_lock(&dir->i_lock);
211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
212 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
213 nfsi->cache_change_attribute = jiffies;
214 nfsi->change_attr = cinfo->after;
215 spin_unlock(&dir->i_lock);
218 struct nfs4_opendata {
220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
228 struct nfs4_state_owner *owner;
229 struct nfs4_state *state;
231 unsigned long timestamp;
232 unsigned int rpc_done : 1;
238 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240 p->o_res.f_attr = &p->f_attr;
241 p->o_res.dir_attr = &p->dir_attr;
242 p->o_res.server = p->o_arg.server;
243 nfs_fattr_init(&p->f_attr);
244 nfs_fattr_init(&p->dir_attr);
247 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
248 struct nfs4_state_owner *sp, int flags,
249 const struct iattr *attrs)
251 struct dentry *parent = dget_parent(path->dentry);
252 struct inode *dir = parent->d_inode;
253 struct nfs_server *server = NFS_SERVER(dir);
254 struct nfs4_opendata *p;
256 p = kzalloc(sizeof(*p), GFP_KERNEL);
259 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
260 if (p->o_arg.seqid == NULL)
262 p->path.mnt = mntget(path->mnt);
263 p->path.dentry = dget(path->dentry);
266 atomic_inc(&sp->so_count);
267 p->o_arg.fh = NFS_FH(dir);
268 p->o_arg.open_flags = flags,
269 p->o_arg.clientid = server->nfs_client->cl_clientid;
270 p->o_arg.id = sp->so_owner_id.id;
271 p->o_arg.name = &p->path.dentry->d_name;
272 p->o_arg.server = server;
273 p->o_arg.bitmask = server->attr_bitmask;
274 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
275 if (flags & O_EXCL) {
276 u32 *s = (u32 *) p->o_arg.u.verifier.data;
279 } else if (flags & O_CREAT) {
280 p->o_arg.u.attrs = &p->attrs;
281 memcpy(&p->attrs, attrs, sizeof(p->attrs));
283 p->c_arg.fh = &p->o_res.fh;
284 p->c_arg.stateid = &p->o_res.stateid;
285 p->c_arg.seqid = p->o_arg.seqid;
286 nfs4_init_opendata_res(p);
296 static void nfs4_opendata_free(struct kref *kref)
298 struct nfs4_opendata *p = container_of(kref,
299 struct nfs4_opendata, kref);
301 nfs_free_seqid(p->o_arg.seqid);
302 if (p->state != NULL)
303 nfs4_put_open_state(p->state);
304 nfs4_put_state_owner(p->owner);
306 dput(p->path.dentry);
311 static void nfs4_opendata_put(struct nfs4_opendata *p)
314 kref_put(&p->kref, nfs4_opendata_free);
317 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
322 rpc_clnt_sigmask(task->tk_client, &oldset);
323 ret = rpc_wait_for_completion_task(task);
324 rpc_clnt_sigunmask(task->tk_client, &oldset);
328 static int can_open_cached(struct nfs4_state *state, int mode)
331 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
333 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
336 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
338 case FMODE_READ|FMODE_WRITE:
339 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
344 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
346 if ((delegation->type & open_flags) != open_flags)
348 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
353 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
355 switch (open_flags) {
362 case FMODE_READ|FMODE_WRITE:
365 nfs4_state_set_mode_locked(state, state->state | open_flags);
368 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
370 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
371 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
372 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
373 switch (open_flags) {
375 set_bit(NFS_O_RDONLY_STATE, &state->flags);
378 set_bit(NFS_O_WRONLY_STATE, &state->flags);
380 case FMODE_READ|FMODE_WRITE:
381 set_bit(NFS_O_RDWR_STATE, &state->flags);
385 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
387 write_seqlock(&state->seqlock);
388 nfs_set_open_stateid_locked(state, stateid, open_flags);
389 write_sequnlock(&state->seqlock);
392 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
394 open_flags &= (FMODE_READ|FMODE_WRITE);
396 * Protect the call to nfs4_state_set_mode_locked and
397 * serialise the stateid update
399 write_seqlock(&state->seqlock);
400 if (deleg_stateid != NULL) {
401 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
402 set_bit(NFS_DELEGATED_STATE, &state->flags);
404 if (open_stateid != NULL)
405 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
406 write_sequnlock(&state->seqlock);
407 spin_lock(&state->owner->so_lock);
408 update_open_stateflags(state, open_flags);
409 spin_unlock(&state->owner->so_lock);
412 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
414 struct nfs_delegation *delegation;
417 delegation = rcu_dereference(NFS_I(inode)->delegation);
418 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
423 nfs_inode_return_delegation(inode);
426 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
428 struct nfs4_state *state = opendata->state;
429 struct nfs_inode *nfsi = NFS_I(state->inode);
430 struct nfs_delegation *delegation;
431 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
432 nfs4_stateid stateid;
436 delegation = rcu_dereference(nfsi->delegation);
438 if (can_open_cached(state, open_mode)) {
439 spin_lock(&state->owner->so_lock);
440 if (can_open_cached(state, open_mode)) {
441 update_open_stateflags(state, open_mode);
442 spin_unlock(&state->owner->so_lock);
444 goto out_return_state;
446 spin_unlock(&state->owner->so_lock);
448 if (delegation == NULL)
450 if (!can_open_delegated(delegation, open_mode))
452 /* Save the delegation */
453 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
456 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
462 delegation = rcu_dereference(nfsi->delegation);
463 /* If no delegation, try a cached open */
464 if (delegation == NULL)
466 /* Is the delegation still valid? */
467 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
470 update_open_stateid(state, NULL, &stateid, open_mode);
471 goto out_return_state;
477 atomic_inc(&state->count);
481 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
484 struct nfs4_state *state = NULL;
485 struct nfs_delegation *delegation;
486 nfs4_stateid *deleg_stateid = NULL;
489 if (!data->rpc_done) {
490 state = nfs4_try_open_cached(data);
495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
498 ret = PTR_ERR(inode);
502 state = nfs4_get_open_state(inode, data->owner);
505 if (data->o_res.delegation_type != 0) {
506 int delegation_flags = 0;
509 delegation = rcu_dereference(NFS_I(inode)->delegation);
511 delegation_flags = delegation->flags;
513 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
514 nfs_inode_set_delegation(state->inode,
515 data->owner->so_cred,
518 nfs_inode_reclaim_delegation(state->inode,
519 data->owner->so_cred,
523 delegation = rcu_dereference(NFS_I(inode)->delegation);
524 if (delegation != NULL)
525 deleg_stateid = &delegation->stateid;
526 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
537 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
539 struct nfs_inode *nfsi = NFS_I(state->inode);
540 struct nfs_open_context *ctx;
542 spin_lock(&state->inode->i_lock);
543 list_for_each_entry(ctx, &nfsi->open_files, list) {
544 if (ctx->state != state)
546 get_nfs_open_context(ctx);
547 spin_unlock(&state->inode->i_lock);
550 spin_unlock(&state->inode->i_lock);
551 return ERR_PTR(-ENOENT);
554 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
556 struct nfs4_opendata *opendata;
558 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
559 if (opendata == NULL)
560 return ERR_PTR(-ENOMEM);
561 opendata->state = state;
562 atomic_inc(&state->count);
566 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
568 struct nfs4_state *newstate;
571 opendata->o_arg.open_flags = openflags;
572 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
573 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
574 nfs4_init_opendata_res(opendata);
575 ret = _nfs4_proc_open(opendata);
578 newstate = nfs4_opendata_to_nfs4_state(opendata);
579 if (IS_ERR(newstate))
580 return PTR_ERR(newstate);
581 nfs4_close_state(&opendata->path, newstate, openflags);
586 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
588 struct nfs4_state *newstate;
591 /* memory barrier prior to reading state->n_* */
592 clear_bit(NFS_DELEGATED_STATE, &state->flags);
594 if (state->n_rdwr != 0) {
595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
598 if (newstate != state)
601 if (state->n_wronly != 0) {
602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
605 if (newstate != state)
608 if (state->n_rdonly != 0) {
609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
612 if (newstate != state)
616 * We may have performed cached opens for all three recoveries.
617 * Check if we need to update the current stateid.
619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
620 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
621 write_seqlock(&state->seqlock);
622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
623 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
624 write_sequnlock(&state->seqlock);
631 * reclaim state on the server after a reboot.
633 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
635 struct nfs_delegation *delegation;
636 struct nfs4_opendata *opendata;
637 int delegation_type = 0;
640 opendata = nfs4_open_recoverdata_alloc(ctx, state);
641 if (IS_ERR(opendata))
642 return PTR_ERR(opendata);
643 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
644 opendata->o_arg.fh = NFS_FH(state->inode);
646 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
647 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
648 delegation_type = delegation->type;
650 opendata->o_arg.u.delegation_type = delegation_type;
651 status = nfs4_open_recover(opendata, state);
652 nfs4_opendata_put(opendata);
656 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
658 struct nfs_server *server = NFS_SERVER(state->inode);
659 struct nfs4_exception exception = { };
662 err = _nfs4_do_open_reclaim(ctx, state);
663 if (err != -NFS4ERR_DELAY)
665 nfs4_handle_exception(server, err, &exception);
666 } while (exception.retry);
670 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
672 struct nfs_open_context *ctx;
675 ctx = nfs4_state_find_open_context(state);
678 ret = nfs4_do_open_reclaim(ctx, state);
679 put_nfs_open_context(ctx);
683 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
685 struct nfs4_opendata *opendata;
688 opendata = nfs4_open_recoverdata_alloc(ctx, state);
689 if (IS_ERR(opendata))
690 return PTR_ERR(opendata);
691 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
692 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
693 sizeof(opendata->o_arg.u.delegation.data));
694 ret = nfs4_open_recover(opendata, state);
695 nfs4_opendata_put(opendata);
699 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
701 struct nfs4_exception exception = { };
702 struct nfs_server *server = NFS_SERVER(state->inode);
705 err = _nfs4_open_delegation_recall(ctx, state, stateid);
709 case -NFS4ERR_STALE_CLIENTID:
710 case -NFS4ERR_STALE_STATEID:
711 case -NFS4ERR_EXPIRED:
712 /* Don't recall a delegation if it was lost */
713 nfs4_schedule_state_recovery(server->nfs_client);
716 err = nfs4_handle_exception(server, err, &exception);
717 } while (exception.retry);
721 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
723 struct nfs4_opendata *data = calldata;
724 struct rpc_message msg = {
725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
726 .rpc_argp = &data->c_arg,
727 .rpc_resp = &data->c_res,
728 .rpc_cred = data->owner->so_cred,
730 data->timestamp = jiffies;
731 rpc_call_setup(task, &msg, 0);
734 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
736 struct nfs4_opendata *data = calldata;
738 data->rpc_status = task->tk_status;
739 if (RPC_ASSASSINATED(task))
741 if (data->rpc_status == 0) {
742 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
743 sizeof(data->o_res.stateid.data));
744 renew_lease(data->o_res.server, data->timestamp);
747 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
748 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
751 static void nfs4_open_confirm_release(void *calldata)
753 struct nfs4_opendata *data = calldata;
754 struct nfs4_state *state = NULL;
756 /* If this request hasn't been cancelled, do nothing */
757 if (data->cancelled == 0)
759 /* In case of error, no cleanup! */
762 nfs_confirm_seqid(&data->owner->so_seqid, 0);
763 state = nfs4_opendata_to_nfs4_state(data);
765 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
767 nfs4_opendata_put(data);
770 static const struct rpc_call_ops nfs4_open_confirm_ops = {
771 .rpc_call_prepare = nfs4_open_confirm_prepare,
772 .rpc_call_done = nfs4_open_confirm_done,
773 .rpc_release = nfs4_open_confirm_release,
777 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
779 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
781 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
782 struct rpc_task *task;
785 kref_get(&data->kref);
787 data->rpc_status = 0;
788 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
790 return PTR_ERR(task);
791 status = nfs4_wait_for_completion_rpc_task(task);
796 status = data->rpc_status;
801 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
803 struct nfs4_opendata *data = calldata;
804 struct nfs4_state_owner *sp = data->owner;
805 struct rpc_message msg = {
806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
807 .rpc_argp = &data->o_arg,
808 .rpc_resp = &data->o_res,
809 .rpc_cred = sp->so_cred,
812 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
815 * Check if we still need to send an OPEN call, or if we can use
816 * a delegation instead.
818 if (data->state != NULL) {
819 struct nfs_delegation *delegation;
821 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
824 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
825 if (delegation != NULL &&
826 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
832 /* Update sequence id. */
833 data->o_arg.id = sp->so_owner_id.id;
834 data->o_arg.clientid = sp->so_client->cl_clientid;
835 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
836 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
837 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
839 data->timestamp = jiffies;
840 rpc_call_setup(task, &msg, 0);
843 task->tk_action = NULL;
847 static void nfs4_open_done(struct rpc_task *task, void *calldata)
849 struct nfs4_opendata *data = calldata;
851 data->rpc_status = task->tk_status;
852 if (RPC_ASSASSINATED(task))
854 if (task->tk_status == 0) {
855 switch (data->o_res.f_attr->mode & S_IFMT) {
859 data->rpc_status = -ELOOP;
862 data->rpc_status = -EISDIR;
865 data->rpc_status = -ENOTDIR;
867 renew_lease(data->o_res.server, data->timestamp);
868 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
869 nfs_confirm_seqid(&data->owner->so_seqid, 0);
871 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
875 static void nfs4_open_release(void *calldata)
877 struct nfs4_opendata *data = calldata;
878 struct nfs4_state *state = NULL;
880 /* If this request hasn't been cancelled, do nothing */
881 if (data->cancelled == 0)
883 /* In case of error, no cleanup! */
884 if (data->rpc_status != 0 || !data->rpc_done)
886 /* In case we need an open_confirm, no cleanup! */
887 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
889 nfs_confirm_seqid(&data->owner->so_seqid, 0);
890 state = nfs4_opendata_to_nfs4_state(data);
892 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
894 nfs4_opendata_put(data);
897 static const struct rpc_call_ops nfs4_open_ops = {
898 .rpc_call_prepare = nfs4_open_prepare,
899 .rpc_call_done = nfs4_open_done,
900 .rpc_release = nfs4_open_release,
904 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
906 static int _nfs4_proc_open(struct nfs4_opendata *data)
908 struct inode *dir = data->dir->d_inode;
909 struct nfs_server *server = NFS_SERVER(dir);
910 struct nfs_openargs *o_arg = &data->o_arg;
911 struct nfs_openres *o_res = &data->o_res;
912 struct rpc_task *task;
915 kref_get(&data->kref);
917 data->rpc_status = 0;
919 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
921 return PTR_ERR(task);
922 status = nfs4_wait_for_completion_rpc_task(task);
927 status = data->rpc_status;
929 if (status != 0 || !data->rpc_done)
932 if (o_res->fh.size == 0)
933 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
935 if (o_arg->open_flags & O_CREAT) {
936 update_changeattr(dir, &o_res->cinfo);
937 nfs_post_op_update_inode(dir, o_res->dir_attr);
939 nfs_refresh_inode(dir, o_res->dir_attr);
940 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
941 status = _nfs4_proc_open_confirm(data);
945 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
946 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
950 static int nfs4_recover_expired_lease(struct nfs_server *server)
952 struct nfs_client *clp = server->nfs_client;
956 ret = nfs4_wait_clnt_recover(server->client, clp);
959 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
961 nfs4_schedule_state_recovery(clp);
968 * reclaim state on the server after a network partition.
969 * Assumes caller holds the appropriate lock
971 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
973 struct nfs4_opendata *opendata;
976 opendata = nfs4_open_recoverdata_alloc(ctx, state);
977 if (IS_ERR(opendata))
978 return PTR_ERR(opendata);
979 ret = nfs4_open_recover(opendata, state);
980 if (ret == -ESTALE) {
981 /* Invalidate the state owner so we don't ever use it again */
982 nfs4_drop_state_owner(state->owner);
983 d_drop(ctx->path.dentry);
985 nfs4_opendata_put(opendata);
989 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
991 struct nfs_server *server = NFS_SERVER(state->inode);
992 struct nfs4_exception exception = { };
996 err = _nfs4_open_expired(ctx, state);
997 if (err == -NFS4ERR_DELAY)
998 nfs4_handle_exception(server, err, &exception);
999 } while (exception.retry);
1003 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1005 struct nfs_open_context *ctx;
1008 ctx = nfs4_state_find_open_context(state);
1010 return PTR_ERR(ctx);
1011 ret = nfs4_do_open_expired(ctx, state);
1012 put_nfs_open_context(ctx);
1017 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1018 * fields corresponding to attributes that were used to store the verifier.
1019 * Make sure we clobber those fields in the later setattr call
1021 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1023 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1024 !(sattr->ia_valid & ATTR_ATIME_SET))
1025 sattr->ia_valid |= ATTR_ATIME;
1027 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1028 !(sattr->ia_valid & ATTR_MTIME_SET))
1029 sattr->ia_valid |= ATTR_MTIME;
1033 * Returns a referenced nfs4_state
1035 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1037 struct nfs4_state_owner *sp;
1038 struct nfs4_state *state = NULL;
1039 struct nfs_server *server = NFS_SERVER(dir);
1040 struct nfs_client *clp = server->nfs_client;
1041 struct nfs4_opendata *opendata;
1044 /* Protect against reboot recovery conflicts */
1046 if (!(sp = nfs4_get_state_owner(server, cred))) {
1047 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1050 status = nfs4_recover_expired_lease(server);
1052 goto err_put_state_owner;
1053 if (path->dentry->d_inode != NULL)
1054 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1055 down_read(&clp->cl_sem);
1057 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1058 if (opendata == NULL)
1059 goto err_release_rwsem;
1061 if (path->dentry->d_inode != NULL)
1062 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1064 status = _nfs4_proc_open(opendata);
1066 goto err_opendata_put;
1068 if (opendata->o_arg.open_flags & O_EXCL)
1069 nfs4_exclusive_attrset(opendata, sattr);
1071 state = nfs4_opendata_to_nfs4_state(opendata);
1072 status = PTR_ERR(state);
1074 goto err_opendata_put;
1075 nfs4_opendata_put(opendata);
1076 nfs4_put_state_owner(sp);
1077 up_read(&clp->cl_sem);
1081 nfs4_opendata_put(opendata);
1083 up_read(&clp->cl_sem);
1084 err_put_state_owner:
1085 nfs4_put_state_owner(sp);
1092 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1094 struct nfs4_exception exception = { };
1095 struct nfs4_state *res;
1099 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1102 /* NOTE: BAD_SEQID means the server and client disagree about the
1103 * book-keeping w.r.t. state-changing operations
1104 * (OPEN/CLOSE/LOCK/LOCKU...)
1105 * It is actually a sign of a bug on the client or on the server.
1107 * If we receive a BAD_SEQID error in the particular case of
1108 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1109 * have unhashed the old state_owner for us, and that we can
1110 * therefore safely retry using a new one. We should still warn
1111 * the user though...
1113 if (status == -NFS4ERR_BAD_SEQID) {
1114 printk(KERN_WARNING "NFS: v4 server %s "
1115 " returned a bad sequence-id error!\n",
1116 NFS_SERVER(dir)->nfs_client->cl_hostname);
1117 exception.retry = 1;
1121 * BAD_STATEID on OPEN means that the server cancelled our
1122 * state before it received the OPEN_CONFIRM.
1123 * Recover by retrying the request as per the discussion
1124 * on Page 181 of RFC3530.
1126 if (status == -NFS4ERR_BAD_STATEID) {
1127 exception.retry = 1;
1130 if (status == -EAGAIN) {
1131 /* We must have found a delegation */
1132 exception.retry = 1;
1135 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1136 status, &exception));
1137 } while (exception.retry);
1141 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1142 struct iattr *sattr, struct nfs4_state *state)
1144 struct nfs_server *server = NFS_SERVER(inode);
1145 struct nfs_setattrargs arg = {
1146 .fh = NFS_FH(inode),
1149 .bitmask = server->attr_bitmask,
1151 struct nfs_setattrres res = {
1155 struct rpc_message msg = {
1156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1160 unsigned long timestamp = jiffies;
1163 nfs_fattr_init(fattr);
1165 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1166 /* Use that stateid */
1167 } else if (state != NULL) {
1168 msg.rpc_cred = state->owner->so_cred;
1169 nfs4_copy_stateid(&arg.stateid, state, current->files);
1171 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1173 status = rpc_call_sync(server->client, &msg, 0);
1174 if (status == 0 && state != NULL)
1175 renew_lease(server, timestamp);
1179 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1180 struct iattr *sattr, struct nfs4_state *state)
1182 struct nfs_server *server = NFS_SERVER(inode);
1183 struct nfs4_exception exception = { };
1186 err = nfs4_handle_exception(server,
1187 _nfs4_do_setattr(inode, fattr, sattr, state),
1189 } while (exception.retry);
1193 struct nfs4_closedata {
1195 struct inode *inode;
1196 struct nfs4_state *state;
1197 struct nfs_closeargs arg;
1198 struct nfs_closeres res;
1199 struct nfs_fattr fattr;
1200 unsigned long timestamp;
1203 static void nfs4_free_closedata(void *data)
1205 struct nfs4_closedata *calldata = data;
1206 struct nfs4_state_owner *sp = calldata->state->owner;
1208 nfs4_put_open_state(calldata->state);
1209 nfs_free_seqid(calldata->arg.seqid);
1210 nfs4_put_state_owner(sp);
1211 dput(calldata->path.dentry);
1212 mntput(calldata->path.mnt);
1216 static void nfs4_close_done(struct rpc_task *task, void *data)
1218 struct nfs4_closedata *calldata = data;
1219 struct nfs4_state *state = calldata->state;
1220 struct nfs_server *server = NFS_SERVER(calldata->inode);
1222 if (RPC_ASSASSINATED(task))
1224 /* hmm. we are done with the inode, and in the process of freeing
1225 * the state_owner. we keep this around to process errors
1227 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1228 switch (task->tk_status) {
1230 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1231 renew_lease(server, calldata->timestamp);
1233 case -NFS4ERR_STALE_STATEID:
1234 case -NFS4ERR_EXPIRED:
1237 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1238 rpc_restart_call(task);
1242 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1245 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1247 struct nfs4_closedata *calldata = data;
1248 struct nfs4_state *state = calldata->state;
1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1251 .rpc_argp = &calldata->arg,
1252 .rpc_resp = &calldata->res,
1253 .rpc_cred = state->owner->so_cred,
1255 int clear_rd, clear_wr, clear_rdwr;
1257 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1260 clear_rd = clear_wr = clear_rdwr = 0;
1261 spin_lock(&state->owner->so_lock);
1262 /* Calculate the change in open mode */
1263 if (state->n_rdwr == 0) {
1264 if (state->n_rdonly == 0) {
1265 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1266 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1268 if (state->n_wronly == 0) {
1269 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1270 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1273 spin_unlock(&state->owner->so_lock);
1274 if (!clear_rd && !clear_wr && !clear_rdwr) {
1275 /* Note: exit _without_ calling nfs4_close_done */
1276 task->tk_action = NULL;
1279 nfs_fattr_init(calldata->res.fattr);
1280 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1281 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1282 calldata->arg.open_flags = FMODE_READ;
1283 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1284 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1285 calldata->arg.open_flags = FMODE_WRITE;
1287 calldata->timestamp = jiffies;
1288 rpc_call_setup(task, &msg, 0);
1291 static const struct rpc_call_ops nfs4_close_ops = {
1292 .rpc_call_prepare = nfs4_close_prepare,
1293 .rpc_call_done = nfs4_close_done,
1294 .rpc_release = nfs4_free_closedata,
1298 * It is possible for data to be read/written from a mem-mapped file
1299 * after the sys_close call (which hits the vfs layer as a flush).
1300 * This means that we can't safely call nfsv4 close on a file until
1301 * the inode is cleared. This in turn means that we are not good
1302 * NFSv4 citizens - we do not indicate to the server to update the file's
1303 * share state even when we are done with one of the three share
1304 * stateid's in the inode.
1306 * NOTE: Caller must be holding the sp->so_owner semaphore!
1308 int nfs4_do_close(struct path *path, struct nfs4_state *state)
1310 struct nfs_server *server = NFS_SERVER(state->inode);
1311 struct nfs4_closedata *calldata;
1312 struct nfs4_state_owner *sp = state->owner;
1313 struct rpc_task *task;
1314 int status = -ENOMEM;
1316 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1317 if (calldata == NULL)
1319 calldata->inode = state->inode;
1320 calldata->state = state;
1321 calldata->arg.fh = NFS_FH(state->inode);
1322 calldata->arg.stateid = &state->open_stateid;
1323 /* Serialization for the sequence id */
1324 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1325 if (calldata->arg.seqid == NULL)
1326 goto out_free_calldata;
1327 calldata->arg.bitmask = server->attr_bitmask;
1328 calldata->res.fattr = &calldata->fattr;
1329 calldata->res.server = server;
1330 calldata->path.mnt = mntget(path->mnt);
1331 calldata->path.dentry = dget(path->dentry);
1333 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1335 return PTR_ERR(task);
1341 nfs4_put_open_state(state);
1342 nfs4_put_state_owner(sp);
1346 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1351 /* If the open_intent is for execute, we have an extra check to make */
1352 if (nd->intent.open.flags & FMODE_EXEC) {
1353 ret = nfs_may_open(state->inode,
1354 state->owner->so_cred,
1355 nd->intent.open.flags);
1359 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1360 if (!IS_ERR(filp)) {
1361 struct nfs_open_context *ctx;
1362 ctx = nfs_file_open_context(filp);
1366 ret = PTR_ERR(filp);
1368 nfs4_close_state(path, state, nd->intent.open.flags);
1373 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1375 struct dentry *parent;
1376 struct path path = {
1381 struct rpc_cred *cred;
1382 struct nfs4_state *state;
1385 if (nd->flags & LOOKUP_CREATE) {
1386 attr.ia_mode = nd->intent.open.create_mode;
1387 attr.ia_valid = ATTR_MODE;
1388 if (!IS_POSIXACL(dir))
1389 attr.ia_mode &= ~current->fs->umask;
1392 BUG_ON(nd->intent.open.flags & O_CREAT);
1395 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1397 return (struct dentry *)cred;
1398 parent = dentry->d_parent;
1399 /* Protect against concurrent sillydeletes */
1400 nfs_block_sillyrename(parent);
1401 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1403 if (IS_ERR(state)) {
1404 if (PTR_ERR(state) == -ENOENT) {
1405 d_add(dentry, NULL);
1406 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1408 nfs_unblock_sillyrename(parent);
1409 return (struct dentry *)state;
1411 res = d_add_unique(dentry, igrab(state->inode));
1414 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1415 nfs_unblock_sillyrename(parent);
1416 nfs4_intent_set_file(nd, &path, state);
1421 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1423 struct path path = {
1427 struct rpc_cred *cred;
1428 struct nfs4_state *state;
1430 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1432 return PTR_ERR(cred);
1433 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1435 if (IS_ERR(state)) {
1436 switch (PTR_ERR(state)) {
1442 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1448 if (state->inode == dentry->d_inode) {
1449 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1450 nfs4_intent_set_file(nd, &path, state);
1453 nfs4_close_state(&path, state, openflags);
1460 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1462 struct nfs4_server_caps_res res = {};
1463 struct rpc_message msg = {
1464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1465 .rpc_argp = fhandle,
1470 status = rpc_call_sync(server->client, &msg, 0);
1472 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1473 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1474 server->caps |= NFS_CAP_ACLS;
1475 if (res.has_links != 0)
1476 server->caps |= NFS_CAP_HARDLINKS;
1477 if (res.has_symlinks != 0)
1478 server->caps |= NFS_CAP_SYMLINKS;
1479 server->acl_bitmask = res.acl_bitmask;
1484 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1486 struct nfs4_exception exception = { };
1489 err = nfs4_handle_exception(server,
1490 _nfs4_server_capabilities(server, fhandle),
1492 } while (exception.retry);
1496 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1497 struct nfs_fsinfo *info)
1499 struct nfs4_lookup_root_arg args = {
1500 .bitmask = nfs4_fattr_bitmap,
1502 struct nfs4_lookup_res res = {
1504 .fattr = info->fattr,
1507 struct rpc_message msg = {
1508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1512 nfs_fattr_init(info->fattr);
1513 return rpc_call_sync(server->client, &msg, 0);
1516 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1517 struct nfs_fsinfo *info)
1519 struct nfs4_exception exception = { };
1522 err = nfs4_handle_exception(server,
1523 _nfs4_lookup_root(server, fhandle, info),
1525 } while (exception.retry);
1530 * get the file handle for the "/" directory on the server
1532 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1533 struct nfs_fsinfo *info)
1537 status = nfs4_lookup_root(server, fhandle, info);
1539 status = nfs4_server_capabilities(server, fhandle);
1541 status = nfs4_do_fsinfo(server, fhandle, info);
1542 return nfs4_map_errors(status);
1546 * Get locations and (maybe) other attributes of a referral.
1547 * Note that we'll actually follow the referral later when
1548 * we detect fsid mismatch in inode revalidation
1550 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1552 int status = -ENOMEM;
1553 struct page *page = NULL;
1554 struct nfs4_fs_locations *locations = NULL;
1556 page = alloc_page(GFP_KERNEL);
1559 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1560 if (locations == NULL)
1563 status = nfs4_proc_fs_locations(dir, name, locations, page);
1566 /* Make sure server returned a different fsid for the referral */
1567 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1568 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1573 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1574 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1576 fattr->mode = S_IFDIR;
1577 memset(fhandle, 0, sizeof(struct nfs_fh));
1586 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1588 struct nfs4_getattr_arg args = {
1590 .bitmask = server->attr_bitmask,
1592 struct nfs4_getattr_res res = {
1596 struct rpc_message msg = {
1597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1602 nfs_fattr_init(fattr);
1603 return rpc_call_sync(server->client, &msg, 0);
1606 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1608 struct nfs4_exception exception = { };
1611 err = nfs4_handle_exception(server,
1612 _nfs4_proc_getattr(server, fhandle, fattr),
1614 } while (exception.retry);
1619 * The file is not closed if it is opened due to the a request to change
1620 * the size of the file. The open call will not be needed once the
1621 * VFS layer lookup-intents are implemented.
1623 * Close is called when the inode is destroyed.
1624 * If we haven't opened the file for O_WRONLY, we
1625 * need to in the size_change case to obtain a stateid.
1628 * Because OPEN is always done by name in nfsv4, it is
1629 * possible that we opened a different file by the same
1630 * name. We can recognize this race condition, but we
1631 * can't do anything about it besides returning an error.
1633 * This will be fixed with VFS changes (lookup-intent).
1636 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1637 struct iattr *sattr)
1639 struct rpc_cred *cred;
1640 struct inode *inode = dentry->d_inode;
1641 struct nfs_open_context *ctx;
1642 struct nfs4_state *state = NULL;
1645 nfs_fattr_init(fattr);
1647 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1649 return PTR_ERR(cred);
1651 /* Search for an existing open(O_WRITE) file */
1652 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1656 status = nfs4_do_setattr(inode, fattr, sattr, state);
1658 nfs_setattr_update_inode(inode, sattr);
1660 put_nfs_open_context(ctx);
1665 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1666 const struct qstr *name, struct nfs_fh *fhandle,
1667 struct nfs_fattr *fattr)
1670 struct nfs4_lookup_arg args = {
1671 .bitmask = server->attr_bitmask,
1675 struct nfs4_lookup_res res = {
1680 struct rpc_message msg = {
1681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1686 nfs_fattr_init(fattr);
1688 dprintk("NFS call lookupfh %s\n", name->name);
1689 status = rpc_call_sync(server->client, &msg, 0);
1690 dprintk("NFS reply lookupfh: %d\n", status);
1694 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1695 struct qstr *name, struct nfs_fh *fhandle,
1696 struct nfs_fattr *fattr)
1698 struct nfs4_exception exception = { };
1701 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1703 if (err == -NFS4ERR_MOVED) {
1707 err = nfs4_handle_exception(server, err, &exception);
1708 } while (exception.retry);
1712 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1713 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1717 dprintk("NFS call lookup %s\n", name->name);
1718 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1719 if (status == -NFS4ERR_MOVED)
1720 status = nfs4_get_referral(dir, name, fattr, fhandle);
1721 dprintk("NFS reply lookup: %d\n", status);
1725 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1727 struct nfs4_exception exception = { };
1730 err = nfs4_handle_exception(NFS_SERVER(dir),
1731 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1733 } while (exception.retry);
1737 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1739 struct nfs_server *server = NFS_SERVER(inode);
1740 struct nfs_fattr fattr;
1741 struct nfs4_accessargs args = {
1742 .fh = NFS_FH(inode),
1743 .bitmask = server->attr_bitmask,
1745 struct nfs4_accessres res = {
1749 struct rpc_message msg = {
1750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1753 .rpc_cred = entry->cred,
1755 int mode = entry->mask;
1759 * Determine which access bits we want to ask for...
1761 if (mode & MAY_READ)
1762 args.access |= NFS4_ACCESS_READ;
1763 if (S_ISDIR(inode->i_mode)) {
1764 if (mode & MAY_WRITE)
1765 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1766 if (mode & MAY_EXEC)
1767 args.access |= NFS4_ACCESS_LOOKUP;
1769 if (mode & MAY_WRITE)
1770 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1771 if (mode & MAY_EXEC)
1772 args.access |= NFS4_ACCESS_EXECUTE;
1774 nfs_fattr_init(&fattr);
1775 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1778 if (res.access & NFS4_ACCESS_READ)
1779 entry->mask |= MAY_READ;
1780 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1781 entry->mask |= MAY_WRITE;
1782 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1783 entry->mask |= MAY_EXEC;
1784 nfs_refresh_inode(inode, &fattr);
1789 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1791 struct nfs4_exception exception = { };
1794 err = nfs4_handle_exception(NFS_SERVER(inode),
1795 _nfs4_proc_access(inode, entry),
1797 } while (exception.retry);
1802 * TODO: For the time being, we don't try to get any attributes
1803 * along with any of the zero-copy operations READ, READDIR,
1806 * In the case of the first three, we want to put the GETATTR
1807 * after the read-type operation -- this is because it is hard
1808 * to predict the length of a GETATTR response in v4, and thus
1809 * align the READ data correctly. This means that the GETATTR
1810 * may end up partially falling into the page cache, and we should
1811 * shift it into the 'tail' of the xdr_buf before processing.
1812 * To do this efficiently, we need to know the total length
1813 * of data received, which doesn't seem to be available outside
1816 * In the case of WRITE, we also want to put the GETATTR after
1817 * the operation -- in this case because we want to make sure
1818 * we get the post-operation mtime and size. This means that
1819 * we can't use xdr_encode_pages() as written: we need a variant
1820 * of it which would leave room in the 'tail' iovec.
1822 * Both of these changes to the XDR layer would in fact be quite
1823 * minor, but I decided to leave them for a subsequent patch.
1825 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1826 unsigned int pgbase, unsigned int pglen)
1828 struct nfs4_readlink args = {
1829 .fh = NFS_FH(inode),
1834 struct rpc_message msg = {
1835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1840 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1843 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1844 unsigned int pgbase, unsigned int pglen)
1846 struct nfs4_exception exception = { };
1849 err = nfs4_handle_exception(NFS_SERVER(inode),
1850 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1852 } while (exception.retry);
1858 * We will need to arrange for the VFS layer to provide an atomic open.
1859 * Until then, this create/open method is prone to inefficiency and race
1860 * conditions due to the lookup, create, and open VFS calls from sys_open()
1861 * placed on the wire.
1863 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1864 * The file will be opened again in the subsequent VFS open call
1865 * (nfs4_proc_file_open).
1867 * The open for read will just hang around to be used by any process that
1868 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1872 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1873 int flags, struct nameidata *nd)
1875 struct path path = {
1879 struct nfs4_state *state;
1880 struct rpc_cred *cred;
1883 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1885 status = PTR_ERR(cred);
1888 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1891 if (IS_ERR(state)) {
1892 status = PTR_ERR(state);
1895 d_add(dentry, igrab(state->inode));
1896 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1897 if (flags & O_EXCL) {
1898 struct nfs_fattr fattr;
1899 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1901 nfs_setattr_update_inode(state->inode, sattr);
1902 nfs_post_op_update_inode(state->inode, &fattr);
1904 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1905 status = nfs4_intent_set_file(nd, &path, state);
1907 nfs4_close_state(&path, state, flags);
1912 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1914 struct nfs_server *server = NFS_SERVER(dir);
1915 struct nfs_removeargs args = {
1917 .name.len = name->len,
1918 .name.name = name->name,
1919 .bitmask = server->attr_bitmask,
1921 struct nfs_removeres res = {
1924 struct rpc_message msg = {
1925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1931 nfs_fattr_init(&res.dir_attr);
1932 status = rpc_call_sync(server->client, &msg, 0);
1934 update_changeattr(dir, &res.cinfo);
1935 nfs_post_op_update_inode(dir, &res.dir_attr);
1940 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1942 struct nfs4_exception exception = { };
1945 err = nfs4_handle_exception(NFS_SERVER(dir),
1946 _nfs4_proc_remove(dir, name),
1948 } while (exception.retry);
1952 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1954 struct nfs_server *server = NFS_SERVER(dir);
1955 struct nfs_removeargs *args = msg->rpc_argp;
1956 struct nfs_removeres *res = msg->rpc_resp;
1958 args->bitmask = server->attr_bitmask;
1959 res->server = server;
1960 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1963 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1965 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1967 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1969 update_changeattr(dir, &res->cinfo);
1970 nfs_post_op_update_inode(dir, &res->dir_attr);
1974 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1975 struct inode *new_dir, struct qstr *new_name)
1977 struct nfs_server *server = NFS_SERVER(old_dir);
1978 struct nfs4_rename_arg arg = {
1979 .old_dir = NFS_FH(old_dir),
1980 .new_dir = NFS_FH(new_dir),
1981 .old_name = old_name,
1982 .new_name = new_name,
1983 .bitmask = server->attr_bitmask,
1985 struct nfs_fattr old_fattr, new_fattr;
1986 struct nfs4_rename_res res = {
1988 .old_fattr = &old_fattr,
1989 .new_fattr = &new_fattr,
1991 struct rpc_message msg = {
1992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1998 nfs_fattr_init(res.old_fattr);
1999 nfs_fattr_init(res.new_fattr);
2000 status = rpc_call_sync(server->client, &msg, 0);
2003 update_changeattr(old_dir, &res.old_cinfo);
2004 nfs_post_op_update_inode(old_dir, res.old_fattr);
2005 update_changeattr(new_dir, &res.new_cinfo);
2006 nfs_post_op_update_inode(new_dir, res.new_fattr);
2011 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2012 struct inode *new_dir, struct qstr *new_name)
2014 struct nfs4_exception exception = { };
2017 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2018 _nfs4_proc_rename(old_dir, old_name,
2021 } while (exception.retry);
2025 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2027 struct nfs_server *server = NFS_SERVER(inode);
2028 struct nfs4_link_arg arg = {
2029 .fh = NFS_FH(inode),
2030 .dir_fh = NFS_FH(dir),
2032 .bitmask = server->attr_bitmask,
2034 struct nfs_fattr fattr, dir_attr;
2035 struct nfs4_link_res res = {
2038 .dir_attr = &dir_attr,
2040 struct rpc_message msg = {
2041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2047 nfs_fattr_init(res.fattr);
2048 nfs_fattr_init(res.dir_attr);
2049 status = rpc_call_sync(server->client, &msg, 0);
2051 update_changeattr(dir, &res.cinfo);
2052 nfs_post_op_update_inode(dir, res.dir_attr);
2053 nfs_post_op_update_inode(inode, res.fattr);
2059 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2061 struct nfs4_exception exception = { };
2064 err = nfs4_handle_exception(NFS_SERVER(inode),
2065 _nfs4_proc_link(inode, dir, name),
2067 } while (exception.retry);
2071 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2072 struct page *page, unsigned int len, struct iattr *sattr)
2074 struct nfs_server *server = NFS_SERVER(dir);
2075 struct nfs_fh fhandle;
2076 struct nfs_fattr fattr, dir_fattr;
2077 struct nfs4_create_arg arg = {
2078 .dir_fh = NFS_FH(dir),
2080 .name = &dentry->d_name,
2083 .bitmask = server->attr_bitmask,
2085 struct nfs4_create_res res = {
2089 .dir_fattr = &dir_fattr,
2091 struct rpc_message msg = {
2092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2098 if (len > NFS4_MAXPATHLEN)
2099 return -ENAMETOOLONG;
2101 arg.u.symlink.pages = &page;
2102 arg.u.symlink.len = len;
2103 nfs_fattr_init(&fattr);
2104 nfs_fattr_init(&dir_fattr);
2106 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2108 update_changeattr(dir, &res.dir_cinfo);
2109 nfs_post_op_update_inode(dir, res.dir_fattr);
2110 status = nfs_instantiate(dentry, &fhandle, &fattr);
2115 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2116 struct page *page, unsigned int len, struct iattr *sattr)
2118 struct nfs4_exception exception = { };
2121 err = nfs4_handle_exception(NFS_SERVER(dir),
2122 _nfs4_proc_symlink(dir, dentry, page,
2125 } while (exception.retry);
2129 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2130 struct iattr *sattr)
2132 struct nfs_server *server = NFS_SERVER(dir);
2133 struct nfs_fh fhandle;
2134 struct nfs_fattr fattr, dir_fattr;
2135 struct nfs4_create_arg arg = {
2136 .dir_fh = NFS_FH(dir),
2138 .name = &dentry->d_name,
2141 .bitmask = server->attr_bitmask,
2143 struct nfs4_create_res res = {
2147 .dir_fattr = &dir_fattr,
2149 struct rpc_message msg = {
2150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2156 nfs_fattr_init(&fattr);
2157 nfs_fattr_init(&dir_fattr);
2159 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2161 update_changeattr(dir, &res.dir_cinfo);
2162 nfs_post_op_update_inode(dir, res.dir_fattr);
2163 status = nfs_instantiate(dentry, &fhandle, &fattr);
2168 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2169 struct iattr *sattr)
2171 struct nfs4_exception exception = { };
2174 err = nfs4_handle_exception(NFS_SERVER(dir),
2175 _nfs4_proc_mkdir(dir, dentry, sattr),
2177 } while (exception.retry);
2181 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2182 u64 cookie, struct page *page, unsigned int count, int plus)
2184 struct inode *dir = dentry->d_inode;
2185 struct nfs4_readdir_arg args = {
2190 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2192 struct nfs4_readdir_res res;
2193 struct rpc_message msg = {
2194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2201 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2202 dentry->d_parent->d_name.name,
2203 dentry->d_name.name,
2204 (unsigned long long)cookie);
2205 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2206 res.pgbase = args.pgbase;
2207 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2209 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2211 nfs_invalidate_atime(dir);
2213 dprintk("%s: returns %d\n", __FUNCTION__, status);
2217 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2218 u64 cookie, struct page *page, unsigned int count, int plus)
2220 struct nfs4_exception exception = { };
2223 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2224 _nfs4_proc_readdir(dentry, cred, cookie,
2227 } while (exception.retry);
2231 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2232 struct iattr *sattr, dev_t rdev)
2234 struct nfs_server *server = NFS_SERVER(dir);
2236 struct nfs_fattr fattr, dir_fattr;
2237 struct nfs4_create_arg arg = {
2238 .dir_fh = NFS_FH(dir),
2240 .name = &dentry->d_name,
2242 .bitmask = server->attr_bitmask,
2244 struct nfs4_create_res res = {
2248 .dir_fattr = &dir_fattr,
2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2256 int mode = sattr->ia_mode;
2258 nfs_fattr_init(&fattr);
2259 nfs_fattr_init(&dir_fattr);
2261 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2262 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2264 arg.ftype = NF4FIFO;
2265 else if (S_ISBLK(mode)) {
2267 arg.u.device.specdata1 = MAJOR(rdev);
2268 arg.u.device.specdata2 = MINOR(rdev);
2270 else if (S_ISCHR(mode)) {
2272 arg.u.device.specdata1 = MAJOR(rdev);
2273 arg.u.device.specdata2 = MINOR(rdev);
2276 arg.ftype = NF4SOCK;
2278 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2280 update_changeattr(dir, &res.dir_cinfo);
2281 nfs_post_op_update_inode(dir, res.dir_fattr);
2282 status = nfs_instantiate(dentry, &fh, &fattr);
2287 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2288 struct iattr *sattr, dev_t rdev)
2290 struct nfs4_exception exception = { };
2293 err = nfs4_handle_exception(NFS_SERVER(dir),
2294 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2296 } while (exception.retry);
2300 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_fsstat *fsstat)
2303 struct nfs4_statfs_arg args = {
2305 .bitmask = server->attr_bitmask,
2307 struct rpc_message msg = {
2308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2313 nfs_fattr_init(fsstat->fattr);
2314 return rpc_call_sync(server->client, &msg, 0);
2317 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2319 struct nfs4_exception exception = { };
2322 err = nfs4_handle_exception(server,
2323 _nfs4_proc_statfs(server, fhandle, fsstat),
2325 } while (exception.retry);
2329 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2330 struct nfs_fsinfo *fsinfo)
2332 struct nfs4_fsinfo_arg args = {
2334 .bitmask = server->attr_bitmask,
2336 struct rpc_message msg = {
2337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2342 return rpc_call_sync(server->client, &msg, 0);
2345 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2347 struct nfs4_exception exception = { };
2351 err = nfs4_handle_exception(server,
2352 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2354 } while (exception.retry);
2358 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2360 nfs_fattr_init(fsinfo->fattr);
2361 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2364 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2365 struct nfs_pathconf *pathconf)
2367 struct nfs4_pathconf_arg args = {
2369 .bitmask = server->attr_bitmask,
2371 struct rpc_message msg = {
2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2374 .rpc_resp = pathconf,
2377 /* None of the pathconf attributes are mandatory to implement */
2378 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2379 memset(pathconf, 0, sizeof(*pathconf));
2383 nfs_fattr_init(pathconf->fattr);
2384 return rpc_call_sync(server->client, &msg, 0);
2387 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2388 struct nfs_pathconf *pathconf)
2390 struct nfs4_exception exception = { };
2394 err = nfs4_handle_exception(server,
2395 _nfs4_proc_pathconf(server, fhandle, pathconf),
2397 } while (exception.retry);
2401 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2403 struct nfs_server *server = NFS_SERVER(data->inode);
2405 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2406 rpc_restart_call(task);
2410 nfs_invalidate_atime(data->inode);
2411 if (task->tk_status > 0)
2412 renew_lease(server, data->timestamp);
2416 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2420 .rpc_argp = &data->args,
2421 .rpc_resp = &data->res,
2422 .rpc_cred = data->cred,
2425 data->timestamp = jiffies;
2427 rpc_call_setup(&data->task, &msg, 0);
2430 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2432 struct inode *inode = data->inode;
2434 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2435 rpc_restart_call(task);
2438 if (task->tk_status >= 0) {
2439 renew_lease(NFS_SERVER(inode), data->timestamp);
2440 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2445 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2447 struct rpc_message msg = {
2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2449 .rpc_argp = &data->args,
2450 .rpc_resp = &data->res,
2451 .rpc_cred = data->cred,
2453 struct inode *inode = data->inode;
2454 struct nfs_server *server = NFS_SERVER(inode);
2457 if (how & FLUSH_STABLE) {
2458 if (!NFS_I(inode)->ncommit)
2459 stable = NFS_FILE_SYNC;
2461 stable = NFS_DATA_SYNC;
2463 stable = NFS_UNSTABLE;
2464 data->args.stable = stable;
2465 data->args.bitmask = server->attr_bitmask;
2466 data->res.server = server;
2468 data->timestamp = jiffies;
2470 /* Finalize the task. */
2471 rpc_call_setup(&data->task, &msg, 0);
2474 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2476 struct inode *inode = data->inode;
2478 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2479 rpc_restart_call(task);
2482 nfs_refresh_inode(inode, data->res.fattr);
2486 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2488 struct rpc_message msg = {
2489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2490 .rpc_argp = &data->args,
2491 .rpc_resp = &data->res,
2492 .rpc_cred = data->cred,
2494 struct nfs_server *server = NFS_SERVER(data->inode);
2496 data->args.bitmask = server->attr_bitmask;
2497 data->res.server = server;
2499 rpc_call_setup(&data->task, &msg, 0);
2503 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2504 * standalone procedure for queueing an asynchronous RENEW.
2506 static void nfs4_renew_done(struct rpc_task *task, void *data)
2508 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2509 unsigned long timestamp = (unsigned long)data;
2511 if (task->tk_status < 0) {
2512 switch (task->tk_status) {
2513 case -NFS4ERR_STALE_CLIENTID:
2514 case -NFS4ERR_EXPIRED:
2515 case -NFS4ERR_CB_PATH_DOWN:
2516 nfs4_schedule_state_recovery(clp);
2520 spin_lock(&clp->cl_lock);
2521 if (time_before(clp->cl_last_renewal,timestamp))
2522 clp->cl_last_renewal = timestamp;
2523 spin_unlock(&clp->cl_lock);
2526 static const struct rpc_call_ops nfs4_renew_ops = {
2527 .rpc_call_done = nfs4_renew_done,
2530 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2538 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2539 &nfs4_renew_ops, (void *)jiffies);
2542 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2549 unsigned long now = jiffies;
2552 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2555 spin_lock(&clp->cl_lock);
2556 if (time_before(clp->cl_last_renewal,now))
2557 clp->cl_last_renewal = now;
2558 spin_unlock(&clp->cl_lock);
2562 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2564 return (server->caps & NFS_CAP_ACLS)
2565 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2566 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2569 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2570 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2573 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2575 static void buf_to_pages(const void *buf, size_t buflen,
2576 struct page **pages, unsigned int *pgbase)
2578 const void *p = buf;
2580 *pgbase = offset_in_page(buf);
2582 while (p < buf + buflen) {
2583 *(pages++) = virt_to_page(p);
2584 p += PAGE_CACHE_SIZE;
2588 struct nfs4_cached_acl {
2594 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2596 struct nfs_inode *nfsi = NFS_I(inode);
2598 spin_lock(&inode->i_lock);
2599 kfree(nfsi->nfs4_acl);
2600 nfsi->nfs4_acl = acl;
2601 spin_unlock(&inode->i_lock);
2604 static void nfs4_zap_acl_attr(struct inode *inode)
2606 nfs4_set_cached_acl(inode, NULL);
2609 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2611 struct nfs_inode *nfsi = NFS_I(inode);
2612 struct nfs4_cached_acl *acl;
2615 spin_lock(&inode->i_lock);
2616 acl = nfsi->nfs4_acl;
2619 if (buf == NULL) /* user is just asking for length */
2621 if (acl->cached == 0)
2623 ret = -ERANGE; /* see getxattr(2) man page */
2624 if (acl->len > buflen)
2626 memcpy(buf, acl->data, acl->len);
2630 spin_unlock(&inode->i_lock);
2634 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2636 struct nfs4_cached_acl *acl;
2638 if (buf && acl_len <= PAGE_SIZE) {
2639 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2643 memcpy(acl->data, buf, acl_len);
2645 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2652 nfs4_set_cached_acl(inode, acl);
2655 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2657 struct page *pages[NFS4ACL_MAXPAGES];
2658 struct nfs_getaclargs args = {
2659 .fh = NFS_FH(inode),
2663 size_t resp_len = buflen;
2665 struct rpc_message msg = {
2666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2668 .rpc_resp = &resp_len,
2670 struct page *localpage = NULL;
2673 if (buflen < PAGE_SIZE) {
2674 /* As long as we're doing a round trip to the server anyway,
2675 * let's be prepared for a page of acl data. */
2676 localpage = alloc_page(GFP_KERNEL);
2677 resp_buf = page_address(localpage);
2678 if (localpage == NULL)
2680 args.acl_pages[0] = localpage;
2681 args.acl_pgbase = 0;
2682 resp_len = args.acl_len = PAGE_SIZE;
2685 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2687 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2690 if (resp_len > args.acl_len)
2691 nfs4_write_cached_acl(inode, NULL, resp_len);
2693 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2696 if (resp_len > buflen)
2699 memcpy(buf, resp_buf, resp_len);
2704 __free_page(localpage);
2708 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2710 struct nfs4_exception exception = { };
2713 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2716 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2717 } while (exception.retry);
2721 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2723 struct nfs_server *server = NFS_SERVER(inode);
2726 if (!nfs4_server_supports_acls(server))
2728 ret = nfs_revalidate_inode(server, inode);
2731 ret = nfs4_read_cached_acl(inode, buf, buflen);
2734 return nfs4_get_acl_uncached(inode, buf, buflen);
2737 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2739 struct nfs_server *server = NFS_SERVER(inode);
2740 struct page *pages[NFS4ACL_MAXPAGES];
2741 struct nfs_setaclargs arg = {
2742 .fh = NFS_FH(inode),
2746 struct rpc_message msg = {
2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2753 if (!nfs4_server_supports_acls(server))
2755 nfs_inode_return_delegation(inode);
2756 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2757 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2758 nfs_zap_caches(inode);
2762 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2764 struct nfs4_exception exception = { };
2767 err = nfs4_handle_exception(NFS_SERVER(inode),
2768 __nfs4_proc_set_acl(inode, buf, buflen),
2770 } while (exception.retry);
2775 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2777 struct nfs_client *clp = server->nfs_client;
2779 if (!clp || task->tk_status >= 0)
2781 switch(task->tk_status) {
2782 case -NFS4ERR_STALE_CLIENTID:
2783 case -NFS4ERR_STALE_STATEID:
2784 case -NFS4ERR_EXPIRED:
2785 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2786 nfs4_schedule_state_recovery(clp);
2787 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2788 rpc_wake_up_task(task);
2789 task->tk_status = 0;
2791 case -NFS4ERR_DELAY:
2792 nfs_inc_server_stats((struct nfs_server *) server,
2794 case -NFS4ERR_GRACE:
2795 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2796 task->tk_status = 0;
2798 case -NFS4ERR_OLD_STATEID:
2799 task->tk_status = 0;
2802 task->tk_status = nfs4_map_errors(task->tk_status);
2806 static int nfs4_wait_bit_interruptible(void *word)
2808 if (signal_pending(current))
2809 return -ERESTARTSYS;
2814 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2821 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2823 rpc_clnt_sigmask(clnt, &oldset);
2824 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2825 nfs4_wait_bit_interruptible,
2826 TASK_INTERRUPTIBLE);
2827 rpc_clnt_sigunmask(clnt, &oldset);
2829 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2833 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2841 *timeout = NFS4_POLL_RETRY_MIN;
2842 if (*timeout > NFS4_POLL_RETRY_MAX)
2843 *timeout = NFS4_POLL_RETRY_MAX;
2844 rpc_clnt_sigmask(clnt, &oldset);
2845 if (clnt->cl_intr) {
2846 schedule_timeout_interruptible(*timeout);
2850 schedule_timeout_uninterruptible(*timeout);
2851 rpc_clnt_sigunmask(clnt, &oldset);
2856 /* This is the error handling routine for processes that are allowed
2859 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2861 struct nfs_client *clp = server->nfs_client;
2862 int ret = errorcode;
2864 exception->retry = 0;
2868 case -NFS4ERR_STALE_CLIENTID:
2869 case -NFS4ERR_STALE_STATEID:
2870 case -NFS4ERR_EXPIRED:
2871 nfs4_schedule_state_recovery(clp);
2872 ret = nfs4_wait_clnt_recover(server->client, clp);
2874 exception->retry = 1;
2876 case -NFS4ERR_FILE_OPEN:
2877 case -NFS4ERR_GRACE:
2878 case -NFS4ERR_DELAY:
2879 ret = nfs4_delay(server->client, &exception->timeout);
2882 case -NFS4ERR_OLD_STATEID:
2883 exception->retry = 1;
2885 /* We failed to handle the error */
2886 return nfs4_map_errors(ret);
2889 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2891 nfs4_verifier sc_verifier;
2892 struct nfs4_setclientid setclientid = {
2893 .sc_verifier = &sc_verifier,
2896 struct rpc_message msg = {
2897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2898 .rpc_argp = &setclientid,
2906 p = (__be32*)sc_verifier.data;
2907 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2908 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2911 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2912 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2913 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2914 cred->cr_ops->cr_name,
2915 clp->cl_id_uniquifier);
2916 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2917 sizeof(setclientid.sc_netid), "tcp");
2918 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2919 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2920 clp->cl_ipaddr, port >> 8, port & 255);
2922 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2923 if (status != -NFS4ERR_CLID_INUSE)
2928 ssleep(clp->cl_lease_time + 1);
2930 if (++clp->cl_id_uniquifier == 0)
2936 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2938 struct nfs_fsinfo fsinfo;
2939 struct rpc_message msg = {
2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2942 .rpc_resp = &fsinfo,
2949 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2951 spin_lock(&clp->cl_lock);
2952 clp->cl_lease_time = fsinfo.lease_time * HZ;
2953 clp->cl_last_renewal = now;
2954 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2955 spin_unlock(&clp->cl_lock);
2960 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2965 err = _nfs4_proc_setclientid_confirm(clp, cred);
2969 case -NFS4ERR_RESOURCE:
2970 /* The IBM lawyers misread another document! */
2971 case -NFS4ERR_DELAY:
2972 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2978 struct nfs4_delegreturndata {
2979 struct nfs4_delegreturnargs args;
2980 struct nfs4_delegreturnres res;
2982 nfs4_stateid stateid;
2983 struct rpc_cred *cred;
2984 unsigned long timestamp;
2985 struct nfs_fattr fattr;
2989 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2991 struct nfs4_delegreturndata *data = calldata;
2992 struct rpc_message msg = {
2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2994 .rpc_argp = &data->args,
2995 .rpc_resp = &data->res,
2996 .rpc_cred = data->cred,
2998 nfs_fattr_init(data->res.fattr);
2999 rpc_call_setup(task, &msg, 0);
3002 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3004 struct nfs4_delegreturndata *data = calldata;
3005 data->rpc_status = task->tk_status;
3006 if (data->rpc_status == 0)
3007 renew_lease(data->res.server, data->timestamp);
3010 static void nfs4_delegreturn_release(void *calldata)
3012 struct nfs4_delegreturndata *data = calldata;
3014 put_rpccred(data->cred);
3018 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3019 .rpc_call_prepare = nfs4_delegreturn_prepare,
3020 .rpc_call_done = nfs4_delegreturn_done,
3021 .rpc_release = nfs4_delegreturn_release,
3024 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3026 struct nfs4_delegreturndata *data;
3027 struct nfs_server *server = NFS_SERVER(inode);
3028 struct rpc_task *task;
3031 data = kmalloc(sizeof(*data), GFP_KERNEL);
3034 data->args.fhandle = &data->fh;
3035 data->args.stateid = &data->stateid;
3036 data->args.bitmask = server->attr_bitmask;
3037 nfs_copy_fh(&data->fh, NFS_FH(inode));
3038 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3039 data->res.fattr = &data->fattr;
3040 data->res.server = server;
3041 data->cred = get_rpccred(cred);
3042 data->timestamp = jiffies;
3043 data->rpc_status = 0;
3045 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
3047 return PTR_ERR(task);
3048 status = nfs4_wait_for_completion_rpc_task(task);
3050 status = data->rpc_status;
3052 nfs_refresh_inode(inode, &data->fattr);
3058 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3060 struct nfs_server *server = NFS_SERVER(inode);
3061 struct nfs4_exception exception = { };
3064 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3066 case -NFS4ERR_STALE_STATEID:
3067 case -NFS4ERR_EXPIRED:
3071 err = nfs4_handle_exception(server, err, &exception);
3072 } while (exception.retry);
3076 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3077 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3080 * sleep, with exponential backoff, and retry the LOCK operation.
3082 static unsigned long
3083 nfs4_set_lock_task_retry(unsigned long timeout)
3085 schedule_timeout_interruptible(timeout);
3087 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3088 return NFS4_LOCK_MAXTIMEOUT;
3092 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3094 struct inode *inode = state->inode;
3095 struct nfs_server *server = NFS_SERVER(inode);
3096 struct nfs_client *clp = server->nfs_client;
3097 struct nfs_lockt_args arg = {
3098 .fh = NFS_FH(inode),
3101 struct nfs_lockt_res res = {
3104 struct rpc_message msg = {
3105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3108 .rpc_cred = state->owner->so_cred,
3110 struct nfs4_lock_state *lsp;
3113 down_read(&clp->cl_sem);
3114 arg.lock_owner.clientid = clp->cl_clientid;
3115 status = nfs4_set_lock_state(state, request);
3118 lsp = request->fl_u.nfs4_fl.owner;
3119 arg.lock_owner.id = lsp->ls_id.id;
3120 status = rpc_call_sync(server->client, &msg, 0);
3123 request->fl_type = F_UNLCK;
3125 case -NFS4ERR_DENIED:
3128 request->fl_ops->fl_release_private(request);
3130 up_read(&clp->cl_sem);
3134 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3136 struct nfs4_exception exception = { };
3140 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3141 _nfs4_proc_getlk(state, cmd, request),
3143 } while (exception.retry);
3147 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3150 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3152 res = posix_lock_file_wait(file, fl);
3155 res = flock_lock_file_wait(file, fl);
3163 struct nfs4_unlockdata {
3164 struct nfs_locku_args arg;
3165 struct nfs_locku_res res;
3166 struct nfs4_lock_state *lsp;
3167 struct nfs_open_context *ctx;
3168 struct file_lock fl;
3169 const struct nfs_server *server;
3170 unsigned long timestamp;
3173 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3174 struct nfs_open_context *ctx,
3175 struct nfs4_lock_state *lsp,
3176 struct nfs_seqid *seqid)
3178 struct nfs4_unlockdata *p;
3179 struct inode *inode = lsp->ls_state->inode;
3181 p = kmalloc(sizeof(*p), GFP_KERNEL);
3184 p->arg.fh = NFS_FH(inode);
3186 p->arg.seqid = seqid;
3187 p->arg.stateid = &lsp->ls_stateid;
3189 atomic_inc(&lsp->ls_count);
3190 /* Ensure we don't close file until we're done freeing locks! */
3191 p->ctx = get_nfs_open_context(ctx);
3192 memcpy(&p->fl, fl, sizeof(p->fl));
3193 p->server = NFS_SERVER(inode);
3197 static void nfs4_locku_release_calldata(void *data)
3199 struct nfs4_unlockdata *calldata = data;
3200 nfs_free_seqid(calldata->arg.seqid);
3201 nfs4_put_lock_state(calldata->lsp);
3202 put_nfs_open_context(calldata->ctx);
3206 static void nfs4_locku_done(struct rpc_task *task, void *data)
3208 struct nfs4_unlockdata *calldata = data;
3210 if (RPC_ASSASSINATED(task))
3212 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3213 switch (task->tk_status) {
3215 memcpy(calldata->lsp->ls_stateid.data,
3216 calldata->res.stateid.data,
3217 sizeof(calldata->lsp->ls_stateid.data));
3218 renew_lease(calldata->server, calldata->timestamp);
3220 case -NFS4ERR_STALE_STATEID:
3221 case -NFS4ERR_EXPIRED:
3224 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3225 rpc_restart_call(task);
3229 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3231 struct nfs4_unlockdata *calldata = data;
3232 struct rpc_message msg = {
3233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3234 .rpc_argp = &calldata->arg,
3235 .rpc_resp = &calldata->res,
3236 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3239 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3241 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3242 /* Note: exit _without_ running nfs4_locku_done */
3243 task->tk_action = NULL;
3246 calldata->timestamp = jiffies;
3247 rpc_call_setup(task, &msg, 0);
3250 static const struct rpc_call_ops nfs4_locku_ops = {
3251 .rpc_call_prepare = nfs4_locku_prepare,
3252 .rpc_call_done = nfs4_locku_done,
3253 .rpc_release = nfs4_locku_release_calldata,
3256 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3257 struct nfs_open_context *ctx,
3258 struct nfs4_lock_state *lsp,
3259 struct nfs_seqid *seqid)
3261 struct nfs4_unlockdata *data;
3263 /* Ensure this is an unlock - when canceling a lock, the
3264 * canceled lock is passed in, and it won't be an unlock.
3266 fl->fl_type = F_UNLCK;
3268 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3270 nfs_free_seqid(seqid);
3271 return ERR_PTR(-ENOMEM);
3274 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3277 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3279 struct nfs_seqid *seqid;
3280 struct nfs4_lock_state *lsp;
3281 struct rpc_task *task;
3284 status = nfs4_set_lock_state(state, request);
3285 /* Unlock _before_ we do the RPC call */
3286 request->fl_flags |= FL_EXISTS;
3287 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3291 /* Is this a delegated lock? */
3292 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3294 lsp = request->fl_u.nfs4_fl.owner;
3295 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3299 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3300 status = PTR_ERR(task);
3303 status = nfs4_wait_for_completion_rpc_task(task);
3309 struct nfs4_lockdata {
3310 struct nfs_lock_args arg;
3311 struct nfs_lock_res res;
3312 struct nfs4_lock_state *lsp;
3313 struct nfs_open_context *ctx;
3314 struct file_lock fl;
3315 unsigned long timestamp;
3320 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3321 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3323 struct nfs4_lockdata *p;
3324 struct inode *inode = lsp->ls_state->inode;
3325 struct nfs_server *server = NFS_SERVER(inode);
3327 p = kzalloc(sizeof(*p), GFP_KERNEL);
3331 p->arg.fh = NFS_FH(inode);
3333 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3334 if (p->arg.lock_seqid == NULL)
3336 p->arg.lock_stateid = &lsp->ls_stateid;
3337 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3338 p->arg.lock_owner.id = lsp->ls_id.id;
3340 atomic_inc(&lsp->ls_count);
3341 p->ctx = get_nfs_open_context(ctx);
3342 memcpy(&p->fl, fl, sizeof(p->fl));
3349 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3351 struct nfs4_lockdata *data = calldata;
3352 struct nfs4_state *state = data->lsp->ls_state;
3353 struct nfs4_state_owner *sp = state->owner;
3354 struct rpc_message msg = {
3355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3356 .rpc_argp = &data->arg,
3357 .rpc_resp = &data->res,
3358 .rpc_cred = sp->so_cred,
3361 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3363 dprintk("%s: begin!\n", __FUNCTION__);
3364 /* Do we need to do an open_to_lock_owner? */
3365 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3366 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3367 if (data->arg.open_seqid == NULL) {
3368 data->rpc_status = -ENOMEM;
3369 task->tk_action = NULL;
3372 data->arg.open_stateid = &state->stateid;
3373 data->arg.new_lock_owner = 1;
3375 data->timestamp = jiffies;
3376 rpc_call_setup(task, &msg, 0);
3378 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3381 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3383 struct nfs4_lockdata *data = calldata;
3385 dprintk("%s: begin!\n", __FUNCTION__);
3387 data->rpc_status = task->tk_status;
3388 if (RPC_ASSASSINATED(task))
3390 if (data->arg.new_lock_owner != 0) {
3391 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3392 if (data->rpc_status == 0)
3393 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3397 if (data->rpc_status == 0) {
3398 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3399 sizeof(data->lsp->ls_stateid.data));
3400 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3401 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3403 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3405 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3408 static void nfs4_lock_release(void *calldata)
3410 struct nfs4_lockdata *data = calldata;
3412 dprintk("%s: begin!\n", __FUNCTION__);
3413 if (data->arg.open_seqid != NULL)
3414 nfs_free_seqid(data->arg.open_seqid);
3415 if (data->cancelled != 0) {
3416 struct rpc_task *task;
3417 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3418 data->arg.lock_seqid);
3421 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3423 nfs_free_seqid(data->arg.lock_seqid);
3424 nfs4_put_lock_state(data->lsp);
3425 put_nfs_open_context(data->ctx);
3427 dprintk("%s: done!\n", __FUNCTION__);
3430 static const struct rpc_call_ops nfs4_lock_ops = {
3431 .rpc_call_prepare = nfs4_lock_prepare,
3432 .rpc_call_done = nfs4_lock_done,
3433 .rpc_release = nfs4_lock_release,
3436 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3438 struct nfs4_lockdata *data;
3439 struct rpc_task *task;
3442 dprintk("%s: begin!\n", __FUNCTION__);
3443 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3444 fl->fl_u.nfs4_fl.owner);
3448 data->arg.block = 1;
3450 data->arg.reclaim = 1;
3451 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3452 &nfs4_lock_ops, data);
3454 return PTR_ERR(task);
3455 ret = nfs4_wait_for_completion_rpc_task(task);
3457 ret = data->rpc_status;
3458 if (ret == -NFS4ERR_DENIED)
3461 data->cancelled = 1;
3463 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3467 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3469 struct nfs_server *server = NFS_SERVER(state->inode);
3470 struct nfs4_exception exception = { };
3474 /* Cache the lock if possible... */
3475 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3477 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3478 if (err != -NFS4ERR_DELAY)
3480 nfs4_handle_exception(server, err, &exception);
3481 } while (exception.retry);
3485 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3487 struct nfs_server *server = NFS_SERVER(state->inode);
3488 struct nfs4_exception exception = { };
3491 err = nfs4_set_lock_state(state, request);
3495 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3497 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3498 if (err != -NFS4ERR_DELAY)
3500 nfs4_handle_exception(server, err, &exception);
3501 } while (exception.retry);
3505 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3507 struct nfs_client *clp = state->owner->so_client;
3508 unsigned char fl_flags = request->fl_flags;
3511 /* Is this a delegated open? */
3512 status = nfs4_set_lock_state(state, request);
3515 request->fl_flags |= FL_ACCESS;
3516 status = do_vfs_lock(request->fl_file, request);
3519 down_read(&clp->cl_sem);
3520 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3521 struct nfs_inode *nfsi = NFS_I(state->inode);
3522 /* Yes: cache locks! */
3523 down_read(&nfsi->rwsem);
3524 /* ...but avoid races with delegation recall... */
3525 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3526 request->fl_flags = fl_flags & ~FL_SLEEP;
3527 status = do_vfs_lock(request->fl_file, request);
3528 up_read(&nfsi->rwsem);
3531 up_read(&nfsi->rwsem);
3533 status = _nfs4_do_setlk(state, cmd, request, 0);
3536 /* Note: we always want to sleep here! */
3537 request->fl_flags = fl_flags | FL_SLEEP;
3538 if (do_vfs_lock(request->fl_file, request) < 0)
3539 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3541 up_read(&clp->cl_sem);
3543 request->fl_flags = fl_flags;
3547 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3549 struct nfs4_exception exception = { };
3553 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3554 _nfs4_proc_setlk(state, cmd, request),
3556 } while (exception.retry);
3561 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3563 struct nfs_open_context *ctx;
3564 struct nfs4_state *state;
3565 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3568 /* verify open state */
3569 ctx = nfs_file_open_context(filp);
3572 if (request->fl_start < 0 || request->fl_end < 0)
3576 return nfs4_proc_getlk(state, F_GETLK, request);
3578 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3581 if (request->fl_type == F_UNLCK)
3582 return nfs4_proc_unlck(state, cmd, request);
3585 status = nfs4_proc_setlk(state, cmd, request);
3586 if ((status != -EAGAIN) || IS_SETLK(cmd))
3588 timeout = nfs4_set_lock_task_retry(timeout);
3589 status = -ERESTARTSYS;
3592 } while(status < 0);
3596 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3598 struct nfs_server *server = NFS_SERVER(state->inode);
3599 struct nfs4_exception exception = { };
3602 err = nfs4_set_lock_state(state, fl);
3606 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3607 if (err != -NFS4ERR_DELAY)
3609 err = nfs4_handle_exception(server, err, &exception);
3610 } while (exception.retry);
3615 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3617 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3618 size_t buflen, int flags)
3620 struct inode *inode = dentry->d_inode;
3622 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3625 if (!S_ISREG(inode->i_mode) &&
3626 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3629 return nfs4_proc_set_acl(inode, buf, buflen);
3632 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3633 * and that's what we'll do for e.g. user attributes that haven't been set.
3634 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3635 * attributes in kernel-managed attribute namespaces. */
3636 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3639 struct inode *inode = dentry->d_inode;
3641 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3644 return nfs4_proc_get_acl(inode, buf, buflen);
3647 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3649 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3651 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3653 if (buf && buflen < len)
3656 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3660 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3661 struct nfs4_fs_locations *fs_locations, struct page *page)
3663 struct nfs_server *server = NFS_SERVER(dir);
3665 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3666 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3668 struct nfs4_fs_locations_arg args = {
3669 .dir_fh = NFS_FH(dir),
3674 struct rpc_message msg = {
3675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3677 .rpc_resp = fs_locations,
3681 dprintk("%s: start\n", __FUNCTION__);
3682 nfs_fattr_init(&fs_locations->fattr);
3683 fs_locations->server = server;
3684 fs_locations->nlocations = 0;
3685 status = rpc_call_sync(server->client, &msg, 0);
3686 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3690 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3691 .recover_open = nfs4_open_reclaim,
3692 .recover_lock = nfs4_lock_reclaim,
3695 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3696 .recover_open = nfs4_open_expired,
3697 .recover_lock = nfs4_lock_expired,
3700 static const struct inode_operations nfs4_file_inode_operations = {
3701 .permission = nfs_permission,
3702 .getattr = nfs_getattr,
3703 .setattr = nfs_setattr,
3704 .getxattr = nfs4_getxattr,
3705 .setxattr = nfs4_setxattr,
3706 .listxattr = nfs4_listxattr,
3709 const struct nfs_rpc_ops nfs_v4_clientops = {
3710 .version = 4, /* protocol version */
3711 .dentry_ops = &nfs4_dentry_operations,
3712 .dir_inode_ops = &nfs4_dir_inode_operations,
3713 .file_inode_ops = &nfs4_file_inode_operations,
3714 .getroot = nfs4_proc_get_root,
3715 .getattr = nfs4_proc_getattr,
3716 .setattr = nfs4_proc_setattr,
3717 .lookupfh = nfs4_proc_lookupfh,
3718 .lookup = nfs4_proc_lookup,
3719 .access = nfs4_proc_access,
3720 .readlink = nfs4_proc_readlink,
3721 .create = nfs4_proc_create,
3722 .remove = nfs4_proc_remove,
3723 .unlink_setup = nfs4_proc_unlink_setup,
3724 .unlink_done = nfs4_proc_unlink_done,
3725 .rename = nfs4_proc_rename,
3726 .link = nfs4_proc_link,
3727 .symlink = nfs4_proc_symlink,
3728 .mkdir = nfs4_proc_mkdir,
3729 .rmdir = nfs4_proc_remove,
3730 .readdir = nfs4_proc_readdir,
3731 .mknod = nfs4_proc_mknod,
3732 .statfs = nfs4_proc_statfs,
3733 .fsinfo = nfs4_proc_fsinfo,
3734 .pathconf = nfs4_proc_pathconf,
3735 .set_capabilities = nfs4_server_capabilities,
3736 .decode_dirent = nfs4_decode_dirent,
3737 .read_setup = nfs4_proc_read_setup,
3738 .read_done = nfs4_read_done,
3739 .write_setup = nfs4_proc_write_setup,
3740 .write_done = nfs4_write_done,
3741 .commit_setup = nfs4_proc_commit_setup,
3742 .commit_done = nfs4_commit_done,
3743 .file_open = nfs_open,
3744 .file_release = nfs_release,
3745 .lock = nfs4_proc_lock,
3746 .clear_acl_cache = nfs4_zap_acl_attr,