4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
66 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 /* Prevent leaks of NFSv4 errors into userland */
72 int nfs4_map_errors(int err)
75 dprintk("%s could not handle NFSv4 error %d\n",
83 * This is our standard bitmap for GETATTR requests.
85 const u32 nfs4_fattr_bitmap[2] = {
90 | FATTR4_WORD0_FILEID,
92 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
102 const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
111 const u32 nfs4_pathconf_bitmap[2] = {
113 | FATTR4_WORD0_MAXNAME,
117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
124 const u32 nfs4_fs_locations_bitmap[2] = {
126 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
132 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
144 struct nfs4_readdir_arg *readdir)
148 BUG_ON(readdir->count < 80);
150 readdir->cookie = cookie;
151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
198 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
200 struct nfs_client *clp = server->nfs_client;
201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
207 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
209 struct nfs_inode *nfsi = NFS_I(dir);
211 spin_lock(&dir->i_lock);
212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
214 nfs_force_lookup_revalidate(dir);
215 nfsi->change_attr = cinfo->after;
216 spin_unlock(&dir->i_lock);
219 struct nfs4_opendata {
221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
229 struct nfs4_state_owner *owner;
230 struct nfs4_state *state;
232 unsigned long timestamp;
233 unsigned int rpc_done : 1;
239 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
243 p->o_res.seqid = p->o_arg.seqid;
244 p->c_res.seqid = p->c_arg.seqid;
245 p->o_res.server = p->o_arg.server;
246 nfs_fattr_init(&p->f_attr);
247 nfs_fattr_init(&p->dir_attr);
250 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
251 struct nfs4_state_owner *sp, int flags,
252 const struct iattr *attrs)
254 struct dentry *parent = dget_parent(path->dentry);
255 struct inode *dir = parent->d_inode;
256 struct nfs_server *server = NFS_SERVER(dir);
257 struct nfs4_opendata *p;
259 p = kzalloc(sizeof(*p), GFP_KERNEL);
262 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (p->o_arg.seqid == NULL)
265 p->path.mnt = mntget(path->mnt);
266 p->path.dentry = dget(path->dentry);
269 atomic_inc(&sp->so_count);
270 p->o_arg.fh = NFS_FH(dir);
271 p->o_arg.open_flags = flags,
272 p->o_arg.clientid = server->nfs_client->cl_clientid;
273 p->o_arg.id = sp->so_owner_id.id;
274 p->o_arg.name = &p->path.dentry->d_name;
275 p->o_arg.server = server;
276 p->o_arg.bitmask = server->attr_bitmask;
277 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
278 if (flags & O_EXCL) {
279 u32 *s = (u32 *) p->o_arg.u.verifier.data;
282 } else if (flags & O_CREAT) {
283 p->o_arg.u.attrs = &p->attrs;
284 memcpy(&p->attrs, attrs, sizeof(p->attrs));
286 p->c_arg.fh = &p->o_res.fh;
287 p->c_arg.stateid = &p->o_res.stateid;
288 p->c_arg.seqid = p->o_arg.seqid;
289 nfs4_init_opendata_res(p);
299 static void nfs4_opendata_free(struct kref *kref)
301 struct nfs4_opendata *p = container_of(kref,
302 struct nfs4_opendata, kref);
304 nfs_free_seqid(p->o_arg.seqid);
305 if (p->state != NULL)
306 nfs4_put_open_state(p->state);
307 nfs4_put_state_owner(p->owner);
313 static void nfs4_opendata_put(struct nfs4_opendata *p)
316 kref_put(&p->kref, nfs4_opendata_free);
319 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
323 ret = rpc_wait_for_completion_task(task);
327 static int can_open_cached(struct nfs4_state *state, int mode)
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
335 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
337 case FMODE_READ|FMODE_WRITE:
338 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
343 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
345 if ((delegation->type & open_flags) != open_flags)
347 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
352 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
354 switch (open_flags) {
361 case FMODE_READ|FMODE_WRITE:
364 nfs4_state_set_mode_locked(state, state->state | open_flags);
367 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
369 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
370 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
371 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
372 switch (open_flags) {
374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
377 set_bit(NFS_O_WRONLY_STATE, &state->flags);
379 case FMODE_READ|FMODE_WRITE:
380 set_bit(NFS_O_RDWR_STATE, &state->flags);
384 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
386 write_seqlock(&state->seqlock);
387 nfs_set_open_stateid_locked(state, stateid, open_flags);
388 write_sequnlock(&state->seqlock);
391 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, int open_flags)
394 * Protect the call to nfs4_state_set_mode_locked and
395 * serialise the stateid update
397 write_seqlock(&state->seqlock);
398 if (deleg_stateid != NULL) {
399 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
400 set_bit(NFS_DELEGATED_STATE, &state->flags);
402 if (open_stateid != NULL)
403 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
404 write_sequnlock(&state->seqlock);
405 spin_lock(&state->owner->so_lock);
406 update_open_stateflags(state, open_flags);
407 spin_unlock(&state->owner->so_lock);
410 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, int open_flags)
412 struct nfs_inode *nfsi = NFS_I(state->inode);
413 struct nfs_delegation *deleg_cur;
416 open_flags &= (FMODE_READ|FMODE_WRITE);
419 deleg_cur = rcu_dereference(nfsi->delegation);
420 if (deleg_cur == NULL)
423 spin_lock(&deleg_cur->lock);
424 if (nfsi->delegation != deleg_cur ||
425 (deleg_cur->type & open_flags) != open_flags)
426 goto no_delegation_unlock;
428 if (delegation == NULL)
429 delegation = &deleg_cur->stateid;
430 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
431 goto no_delegation_unlock;
433 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
435 no_delegation_unlock:
436 spin_unlock(&deleg_cur->lock);
440 if (!ret && open_stateid != NULL) {
441 __update_open_stateid(state, open_stateid, NULL, open_flags);
449 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
451 struct nfs_delegation *delegation;
454 delegation = rcu_dereference(NFS_I(inode)->delegation);
455 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
460 nfs_inode_return_delegation(inode);
463 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
465 struct nfs4_state *state = opendata->state;
466 struct nfs_inode *nfsi = NFS_I(state->inode);
467 struct nfs_delegation *delegation;
468 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
469 nfs4_stateid stateid;
473 if (can_open_cached(state, open_mode)) {
474 spin_lock(&state->owner->so_lock);
475 if (can_open_cached(state, open_mode)) {
476 update_open_stateflags(state, open_mode);
477 spin_unlock(&state->owner->so_lock);
478 goto out_return_state;
480 spin_unlock(&state->owner->so_lock);
483 delegation = rcu_dereference(nfsi->delegation);
484 if (delegation == NULL ||
485 !can_open_delegated(delegation, open_mode)) {
489 /* Save the delegation */
490 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
492 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
497 /* Try to update the stateid using the delegation */
498 if (update_open_stateid(state, NULL, &stateid, open_mode))
499 goto out_return_state;
504 atomic_inc(&state->count);
508 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
511 struct nfs4_state *state = NULL;
512 struct nfs_delegation *delegation;
515 if (!data->rpc_done) {
516 state = nfs4_try_open_cached(data);
521 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
523 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
524 ret = PTR_ERR(inode);
528 state = nfs4_get_open_state(inode, data->owner);
531 if (data->o_res.delegation_type != 0) {
532 int delegation_flags = 0;
535 delegation = rcu_dereference(NFS_I(inode)->delegation);
537 delegation_flags = delegation->flags;
539 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
540 nfs_inode_set_delegation(state->inode,
541 data->owner->so_cred,
544 nfs_inode_reclaim_delegation(state->inode,
545 data->owner->so_cred,
549 update_open_stateid(state, &data->o_res.stateid, NULL,
550 data->o_arg.open_flags);
560 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
562 struct nfs_inode *nfsi = NFS_I(state->inode);
563 struct nfs_open_context *ctx;
565 spin_lock(&state->inode->i_lock);
566 list_for_each_entry(ctx, &nfsi->open_files, list) {
567 if (ctx->state != state)
569 get_nfs_open_context(ctx);
570 spin_unlock(&state->inode->i_lock);
573 spin_unlock(&state->inode->i_lock);
574 return ERR_PTR(-ENOENT);
577 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
579 struct nfs4_opendata *opendata;
581 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
582 if (opendata == NULL)
583 return ERR_PTR(-ENOMEM);
584 opendata->state = state;
585 atomic_inc(&state->count);
589 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
591 struct nfs4_state *newstate;
594 opendata->o_arg.open_flags = openflags;
595 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
596 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
597 nfs4_init_opendata_res(opendata);
598 ret = _nfs4_proc_open(opendata);
601 newstate = nfs4_opendata_to_nfs4_state(opendata);
602 if (IS_ERR(newstate))
603 return PTR_ERR(newstate);
604 nfs4_close_state(&opendata->path, newstate, openflags);
609 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
611 struct nfs4_state *newstate;
614 /* memory barrier prior to reading state->n_* */
615 clear_bit(NFS_DELEGATED_STATE, &state->flags);
617 if (state->n_rdwr != 0) {
618 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
621 if (newstate != state)
624 if (state->n_wronly != 0) {
625 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
628 if (newstate != state)
631 if (state->n_rdonly != 0) {
632 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
635 if (newstate != state)
639 * We may have performed cached opens for all three recoveries.
640 * Check if we need to update the current stateid.
642 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
643 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
644 write_seqlock(&state->seqlock);
645 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
646 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
647 write_sequnlock(&state->seqlock);
654 * reclaim state on the server after a reboot.
656 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
658 struct nfs_delegation *delegation;
659 struct nfs4_opendata *opendata;
660 int delegation_type = 0;
663 opendata = nfs4_open_recoverdata_alloc(ctx, state);
664 if (IS_ERR(opendata))
665 return PTR_ERR(opendata);
666 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
667 opendata->o_arg.fh = NFS_FH(state->inode);
669 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
670 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
671 delegation_type = delegation->type;
673 opendata->o_arg.u.delegation_type = delegation_type;
674 status = nfs4_open_recover(opendata, state);
675 nfs4_opendata_put(opendata);
679 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
681 struct nfs_server *server = NFS_SERVER(state->inode);
682 struct nfs4_exception exception = { };
685 err = _nfs4_do_open_reclaim(ctx, state);
686 if (err != -NFS4ERR_DELAY)
688 nfs4_handle_exception(server, err, &exception);
689 } while (exception.retry);
693 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
695 struct nfs_open_context *ctx;
698 ctx = nfs4_state_find_open_context(state);
701 ret = nfs4_do_open_reclaim(ctx, state);
702 put_nfs_open_context(ctx);
706 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
708 struct nfs4_opendata *opendata;
711 opendata = nfs4_open_recoverdata_alloc(ctx, state);
712 if (IS_ERR(opendata))
713 return PTR_ERR(opendata);
714 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
715 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
716 sizeof(opendata->o_arg.u.delegation.data));
717 ret = nfs4_open_recover(opendata, state);
718 nfs4_opendata_put(opendata);
722 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
724 struct nfs4_exception exception = { };
725 struct nfs_server *server = NFS_SERVER(state->inode);
728 err = _nfs4_open_delegation_recall(ctx, state, stateid);
732 case -NFS4ERR_STALE_CLIENTID:
733 case -NFS4ERR_STALE_STATEID:
734 case -NFS4ERR_EXPIRED:
735 /* Don't recall a delegation if it was lost */
736 nfs4_schedule_state_recovery(server->nfs_client);
739 err = nfs4_handle_exception(server, err, &exception);
740 } while (exception.retry);
744 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
746 struct nfs4_opendata *data = calldata;
748 data->rpc_status = task->tk_status;
749 if (RPC_ASSASSINATED(task))
751 if (data->rpc_status == 0) {
752 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
753 sizeof(data->o_res.stateid.data));
754 nfs_confirm_seqid(&data->owner->so_seqid, 0);
755 renew_lease(data->o_res.server, data->timestamp);
760 static void nfs4_open_confirm_release(void *calldata)
762 struct nfs4_opendata *data = calldata;
763 struct nfs4_state *state = NULL;
765 /* If this request hasn't been cancelled, do nothing */
766 if (data->cancelled == 0)
768 /* In case of error, no cleanup! */
771 state = nfs4_opendata_to_nfs4_state(data);
773 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
775 nfs4_opendata_put(data);
778 static const struct rpc_call_ops nfs4_open_confirm_ops = {
779 .rpc_call_done = nfs4_open_confirm_done,
780 .rpc_release = nfs4_open_confirm_release,
784 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
786 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
788 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
789 struct rpc_task *task;
790 struct rpc_message msg = {
791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
792 .rpc_argp = &data->c_arg,
793 .rpc_resp = &data->c_res,
794 .rpc_cred = data->owner->so_cred,
796 struct rpc_task_setup task_setup_data = {
797 .rpc_client = server->client,
799 .callback_ops = &nfs4_open_confirm_ops,
800 .callback_data = data,
801 .workqueue = nfsiod_workqueue,
802 .flags = RPC_TASK_ASYNC,
806 kref_get(&data->kref);
808 data->rpc_status = 0;
809 data->timestamp = jiffies;
810 task = rpc_run_task(&task_setup_data);
812 return PTR_ERR(task);
813 status = nfs4_wait_for_completion_rpc_task(task);
818 status = data->rpc_status;
823 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
825 struct nfs4_opendata *data = calldata;
826 struct nfs4_state_owner *sp = data->owner;
828 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
831 * Check if we still need to send an OPEN call, or if we can use
832 * a delegation instead.
834 if (data->state != NULL) {
835 struct nfs_delegation *delegation;
837 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
840 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
841 if (delegation != NULL &&
842 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
848 /* Update sequence id. */
849 data->o_arg.id = sp->so_owner_id.id;
850 data->o_arg.clientid = sp->so_client->cl_clientid;
851 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
852 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
853 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
855 data->timestamp = jiffies;
856 rpc_call_start(task);
859 task->tk_action = NULL;
863 static void nfs4_open_done(struct rpc_task *task, void *calldata)
865 struct nfs4_opendata *data = calldata;
867 data->rpc_status = task->tk_status;
868 if (RPC_ASSASSINATED(task))
870 if (task->tk_status == 0) {
871 switch (data->o_res.f_attr->mode & S_IFMT) {
875 data->rpc_status = -ELOOP;
878 data->rpc_status = -EISDIR;
881 data->rpc_status = -ENOTDIR;
883 renew_lease(data->o_res.server, data->timestamp);
884 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
885 nfs_confirm_seqid(&data->owner->so_seqid, 0);
890 static void nfs4_open_release(void *calldata)
892 struct nfs4_opendata *data = calldata;
893 struct nfs4_state *state = NULL;
895 /* If this request hasn't been cancelled, do nothing */
896 if (data->cancelled == 0)
898 /* In case of error, no cleanup! */
899 if (data->rpc_status != 0 || !data->rpc_done)
901 /* In case we need an open_confirm, no cleanup! */
902 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
904 state = nfs4_opendata_to_nfs4_state(data);
906 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
908 nfs4_opendata_put(data);
911 static const struct rpc_call_ops nfs4_open_ops = {
912 .rpc_call_prepare = nfs4_open_prepare,
913 .rpc_call_done = nfs4_open_done,
914 .rpc_release = nfs4_open_release,
918 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
920 static int _nfs4_proc_open(struct nfs4_opendata *data)
922 struct inode *dir = data->dir->d_inode;
923 struct nfs_server *server = NFS_SERVER(dir);
924 struct nfs_openargs *o_arg = &data->o_arg;
925 struct nfs_openres *o_res = &data->o_res;
926 struct rpc_task *task;
927 struct rpc_message msg = {
928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
931 .rpc_cred = data->owner->so_cred,
933 struct rpc_task_setup task_setup_data = {
934 .rpc_client = server->client,
936 .callback_ops = &nfs4_open_ops,
937 .callback_data = data,
938 .workqueue = nfsiod_workqueue,
939 .flags = RPC_TASK_ASYNC,
943 kref_get(&data->kref);
945 data->rpc_status = 0;
947 task = rpc_run_task(&task_setup_data);
949 return PTR_ERR(task);
950 status = nfs4_wait_for_completion_rpc_task(task);
955 status = data->rpc_status;
957 if (status != 0 || !data->rpc_done)
960 if (o_res->fh.size == 0)
961 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
963 if (o_arg->open_flags & O_CREAT) {
964 update_changeattr(dir, &o_res->cinfo);
965 nfs_post_op_update_inode(dir, o_res->dir_attr);
967 nfs_refresh_inode(dir, o_res->dir_attr);
968 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
969 status = _nfs4_proc_open_confirm(data);
973 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
974 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
978 static int nfs4_recover_expired_lease(struct nfs_server *server)
980 struct nfs_client *clp = server->nfs_client;
984 ret = nfs4_wait_clnt_recover(server->client, clp);
987 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
989 nfs4_schedule_state_recovery(clp);
996 * reclaim state on the server after a network partition.
997 * Assumes caller holds the appropriate lock
999 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1001 struct nfs4_opendata *opendata;
1004 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1005 if (IS_ERR(opendata))
1006 return PTR_ERR(opendata);
1007 ret = nfs4_open_recover(opendata, state);
1009 d_drop(ctx->path.dentry);
1010 nfs4_opendata_put(opendata);
1014 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1016 struct nfs_server *server = NFS_SERVER(state->inode);
1017 struct nfs4_exception exception = { };
1021 err = _nfs4_open_expired(ctx, state);
1022 if (err == -NFS4ERR_DELAY)
1023 nfs4_handle_exception(server, err, &exception);
1024 } while (exception.retry);
1028 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1030 struct nfs_open_context *ctx;
1033 ctx = nfs4_state_find_open_context(state);
1035 return PTR_ERR(ctx);
1036 ret = nfs4_do_open_expired(ctx, state);
1037 put_nfs_open_context(ctx);
1042 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1043 * fields corresponding to attributes that were used to store the verifier.
1044 * Make sure we clobber those fields in the later setattr call
1046 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1048 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1049 !(sattr->ia_valid & ATTR_ATIME_SET))
1050 sattr->ia_valid |= ATTR_ATIME;
1052 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1053 !(sattr->ia_valid & ATTR_MTIME_SET))
1054 sattr->ia_valid |= ATTR_MTIME;
1058 * Returns a referenced nfs4_state
1060 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1062 struct nfs4_state_owner *sp;
1063 struct nfs4_state *state = NULL;
1064 struct nfs_server *server = NFS_SERVER(dir);
1065 struct nfs_client *clp = server->nfs_client;
1066 struct nfs4_opendata *opendata;
1069 /* Protect against reboot recovery conflicts */
1071 if (!(sp = nfs4_get_state_owner(server, cred))) {
1072 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1075 status = nfs4_recover_expired_lease(server);
1077 goto err_put_state_owner;
1078 if (path->dentry->d_inode != NULL)
1079 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1080 down_read(&clp->cl_sem);
1082 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1083 if (opendata == NULL)
1084 goto err_release_rwsem;
1086 if (path->dentry->d_inode != NULL)
1087 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1089 status = _nfs4_proc_open(opendata);
1091 goto err_opendata_put;
1093 if (opendata->o_arg.open_flags & O_EXCL)
1094 nfs4_exclusive_attrset(opendata, sattr);
1096 state = nfs4_opendata_to_nfs4_state(opendata);
1097 status = PTR_ERR(state);
1099 goto err_opendata_put;
1100 nfs4_opendata_put(opendata);
1101 nfs4_put_state_owner(sp);
1102 up_read(&clp->cl_sem);
1106 nfs4_opendata_put(opendata);
1108 up_read(&clp->cl_sem);
1109 err_put_state_owner:
1110 nfs4_put_state_owner(sp);
1117 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1119 struct nfs4_exception exception = { };
1120 struct nfs4_state *res;
1124 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1127 /* NOTE: BAD_SEQID means the server and client disagree about the
1128 * book-keeping w.r.t. state-changing operations
1129 * (OPEN/CLOSE/LOCK/LOCKU...)
1130 * It is actually a sign of a bug on the client or on the server.
1132 * If we receive a BAD_SEQID error in the particular case of
1133 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1134 * have unhashed the old state_owner for us, and that we can
1135 * therefore safely retry using a new one. We should still warn
1136 * the user though...
1138 if (status == -NFS4ERR_BAD_SEQID) {
1139 printk(KERN_WARNING "NFS: v4 server %s "
1140 " returned a bad sequence-id error!\n",
1141 NFS_SERVER(dir)->nfs_client->cl_hostname);
1142 exception.retry = 1;
1146 * BAD_STATEID on OPEN means that the server cancelled our
1147 * state before it received the OPEN_CONFIRM.
1148 * Recover by retrying the request as per the discussion
1149 * on Page 181 of RFC3530.
1151 if (status == -NFS4ERR_BAD_STATEID) {
1152 exception.retry = 1;
1155 if (status == -EAGAIN) {
1156 /* We must have found a delegation */
1157 exception.retry = 1;
1160 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1161 status, &exception));
1162 } while (exception.retry);
1166 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1167 struct nfs_fattr *fattr, struct iattr *sattr,
1168 struct nfs4_state *state)
1170 struct nfs_server *server = NFS_SERVER(inode);
1171 struct nfs_setattrargs arg = {
1172 .fh = NFS_FH(inode),
1175 .bitmask = server->attr_bitmask,
1177 struct nfs_setattrres res = {
1181 struct rpc_message msg = {
1182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1187 unsigned long timestamp = jiffies;
1190 nfs_fattr_init(fattr);
1192 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1193 /* Use that stateid */
1194 } else if (state != NULL) {
1195 nfs4_copy_stateid(&arg.stateid, state, current->files);
1197 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1199 status = rpc_call_sync(server->client, &msg, 0);
1200 if (status == 0 && state != NULL)
1201 renew_lease(server, timestamp);
1205 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1206 struct nfs_fattr *fattr, struct iattr *sattr,
1207 struct nfs4_state *state)
1209 struct nfs_server *server = NFS_SERVER(inode);
1210 struct nfs4_exception exception = { };
1213 err = nfs4_handle_exception(server,
1214 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1216 } while (exception.retry);
1220 struct nfs4_closedata {
1222 struct inode *inode;
1223 struct nfs4_state *state;
1224 struct nfs_closeargs arg;
1225 struct nfs_closeres res;
1226 struct nfs_fattr fattr;
1227 unsigned long timestamp;
1230 static void nfs4_free_closedata(void *data)
1232 struct nfs4_closedata *calldata = data;
1233 struct nfs4_state_owner *sp = calldata->state->owner;
1235 nfs4_put_open_state(calldata->state);
1236 nfs_free_seqid(calldata->arg.seqid);
1237 nfs4_put_state_owner(sp);
1238 path_put(&calldata->path);
1242 static void nfs4_close_done(struct rpc_task *task, void *data)
1244 struct nfs4_closedata *calldata = data;
1245 struct nfs4_state *state = calldata->state;
1246 struct nfs_server *server = NFS_SERVER(calldata->inode);
1248 if (RPC_ASSASSINATED(task))
1250 /* hmm. we are done with the inode, and in the process of freeing
1251 * the state_owner. we keep this around to process errors
1253 switch (task->tk_status) {
1255 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1256 renew_lease(server, calldata->timestamp);
1258 case -NFS4ERR_STALE_STATEID:
1259 case -NFS4ERR_EXPIRED:
1262 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1263 rpc_restart_call(task);
1267 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1270 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1272 struct nfs4_closedata *calldata = data;
1273 struct nfs4_state *state = calldata->state;
1274 int clear_rd, clear_wr, clear_rdwr;
1276 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1279 clear_rd = clear_wr = clear_rdwr = 0;
1280 spin_lock(&state->owner->so_lock);
1281 /* Calculate the change in open mode */
1282 if (state->n_rdwr == 0) {
1283 if (state->n_rdonly == 0) {
1284 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1285 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1287 if (state->n_wronly == 0) {
1288 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1289 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1292 spin_unlock(&state->owner->so_lock);
1293 if (!clear_rd && !clear_wr && !clear_rdwr) {
1294 /* Note: exit _without_ calling nfs4_close_done */
1295 task->tk_action = NULL;
1298 nfs_fattr_init(calldata->res.fattr);
1299 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1300 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1301 calldata->arg.open_flags = FMODE_READ;
1302 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1303 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1304 calldata->arg.open_flags = FMODE_WRITE;
1306 calldata->timestamp = jiffies;
1307 rpc_call_start(task);
1310 static const struct rpc_call_ops nfs4_close_ops = {
1311 .rpc_call_prepare = nfs4_close_prepare,
1312 .rpc_call_done = nfs4_close_done,
1313 .rpc_release = nfs4_free_closedata,
1317 * It is possible for data to be read/written from a mem-mapped file
1318 * after the sys_close call (which hits the vfs layer as a flush).
1319 * This means that we can't safely call nfsv4 close on a file until
1320 * the inode is cleared. This in turn means that we are not good
1321 * NFSv4 citizens - we do not indicate to the server to update the file's
1322 * share state even when we are done with one of the three share
1323 * stateid's in the inode.
1325 * NOTE: Caller must be holding the sp->so_owner semaphore!
1327 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1329 struct nfs_server *server = NFS_SERVER(state->inode);
1330 struct nfs4_closedata *calldata;
1331 struct nfs4_state_owner *sp = state->owner;
1332 struct rpc_task *task;
1333 struct rpc_message msg = {
1334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1335 .rpc_cred = state->owner->so_cred,
1337 struct rpc_task_setup task_setup_data = {
1338 .rpc_client = server->client,
1339 .rpc_message = &msg,
1340 .callback_ops = &nfs4_close_ops,
1341 .workqueue = nfsiod_workqueue,
1342 .flags = RPC_TASK_ASYNC,
1344 int status = -ENOMEM;
1346 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1347 if (calldata == NULL)
1349 calldata->inode = state->inode;
1350 calldata->state = state;
1351 calldata->arg.fh = NFS_FH(state->inode);
1352 calldata->arg.stateid = &state->open_stateid;
1353 /* Serialization for the sequence id */
1354 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1355 if (calldata->arg.seqid == NULL)
1356 goto out_free_calldata;
1357 calldata->arg.bitmask = server->attr_bitmask;
1358 calldata->res.fattr = &calldata->fattr;
1359 calldata->res.seqid = calldata->arg.seqid;
1360 calldata->res.server = server;
1361 calldata->path.mnt = mntget(path->mnt);
1362 calldata->path.dentry = dget(path->dentry);
1364 msg.rpc_argp = &calldata->arg,
1365 msg.rpc_resp = &calldata->res,
1366 task_setup_data.callback_data = calldata;
1367 task = rpc_run_task(&task_setup_data);
1369 return PTR_ERR(task);
1372 status = rpc_wait_for_completion_task(task);
1378 nfs4_put_open_state(state);
1379 nfs4_put_state_owner(sp);
1383 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1388 /* If the open_intent is for execute, we have an extra check to make */
1389 if (nd->intent.open.flags & FMODE_EXEC) {
1390 ret = nfs_may_open(state->inode,
1391 state->owner->so_cred,
1392 nd->intent.open.flags);
1396 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1397 if (!IS_ERR(filp)) {
1398 struct nfs_open_context *ctx;
1399 ctx = nfs_file_open_context(filp);
1403 ret = PTR_ERR(filp);
1405 nfs4_close_sync(path, state, nd->intent.open.flags);
1410 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1412 struct path path = {
1413 .mnt = nd->path.mnt,
1416 struct dentry *parent;
1418 struct rpc_cred *cred;
1419 struct nfs4_state *state;
1422 if (nd->flags & LOOKUP_CREATE) {
1423 attr.ia_mode = nd->intent.open.create_mode;
1424 attr.ia_valid = ATTR_MODE;
1425 if (!IS_POSIXACL(dir))
1426 attr.ia_mode &= ~current->fs->umask;
1429 BUG_ON(nd->intent.open.flags & O_CREAT);
1432 cred = rpc_lookup_cred();
1434 return (struct dentry *)cred;
1435 parent = dentry->d_parent;
1436 /* Protect against concurrent sillydeletes */
1437 nfs_block_sillyrename(parent);
1438 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1440 if (IS_ERR(state)) {
1441 if (PTR_ERR(state) == -ENOENT) {
1442 d_add(dentry, NULL);
1443 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1445 nfs_unblock_sillyrename(parent);
1446 return (struct dentry *)state;
1448 res = d_add_unique(dentry, igrab(state->inode));
1451 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1452 nfs_unblock_sillyrename(parent);
1453 nfs4_intent_set_file(nd, &path, state);
1458 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1460 struct path path = {
1461 .mnt = nd->path.mnt,
1464 struct rpc_cred *cred;
1465 struct nfs4_state *state;
1467 cred = rpc_lookup_cred();
1469 return PTR_ERR(cred);
1470 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1472 if (IS_ERR(state)) {
1473 switch (PTR_ERR(state)) {
1479 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1485 if (state->inode == dentry->d_inode) {
1486 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1487 nfs4_intent_set_file(nd, &path, state);
1490 nfs4_close_sync(&path, state, openflags);
1497 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1499 struct nfs4_server_caps_res res = {};
1500 struct rpc_message msg = {
1501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1502 .rpc_argp = fhandle,
1507 status = rpc_call_sync(server->client, &msg, 0);
1509 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1510 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1511 server->caps |= NFS_CAP_ACLS;
1512 if (res.has_links != 0)
1513 server->caps |= NFS_CAP_HARDLINKS;
1514 if (res.has_symlinks != 0)
1515 server->caps |= NFS_CAP_SYMLINKS;
1516 server->acl_bitmask = res.acl_bitmask;
1521 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1523 struct nfs4_exception exception = { };
1526 err = nfs4_handle_exception(server,
1527 _nfs4_server_capabilities(server, fhandle),
1529 } while (exception.retry);
1533 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1534 struct nfs_fsinfo *info)
1536 struct nfs4_lookup_root_arg args = {
1537 .bitmask = nfs4_fattr_bitmap,
1539 struct nfs4_lookup_res res = {
1541 .fattr = info->fattr,
1544 struct rpc_message msg = {
1545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1549 nfs_fattr_init(info->fattr);
1550 return rpc_call_sync(server->client, &msg, 0);
1553 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1554 struct nfs_fsinfo *info)
1556 struct nfs4_exception exception = { };
1559 err = nfs4_handle_exception(server,
1560 _nfs4_lookup_root(server, fhandle, info),
1562 } while (exception.retry);
1567 * get the file handle for the "/" directory on the server
1569 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1570 struct nfs_fsinfo *info)
1574 status = nfs4_lookup_root(server, fhandle, info);
1576 status = nfs4_server_capabilities(server, fhandle);
1578 status = nfs4_do_fsinfo(server, fhandle, info);
1579 return nfs4_map_errors(status);
1583 * Get locations and (maybe) other attributes of a referral.
1584 * Note that we'll actually follow the referral later when
1585 * we detect fsid mismatch in inode revalidation
1587 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1589 int status = -ENOMEM;
1590 struct page *page = NULL;
1591 struct nfs4_fs_locations *locations = NULL;
1593 page = alloc_page(GFP_KERNEL);
1596 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1597 if (locations == NULL)
1600 status = nfs4_proc_fs_locations(dir, name, locations, page);
1603 /* Make sure server returned a different fsid for the referral */
1604 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1605 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1610 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1611 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1613 fattr->mode = S_IFDIR;
1614 memset(fhandle, 0, sizeof(struct nfs_fh));
1623 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1625 struct nfs4_getattr_arg args = {
1627 .bitmask = server->attr_bitmask,
1629 struct nfs4_getattr_res res = {
1633 struct rpc_message msg = {
1634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1639 nfs_fattr_init(fattr);
1640 return rpc_call_sync(server->client, &msg, 0);
1643 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1645 struct nfs4_exception exception = { };
1648 err = nfs4_handle_exception(server,
1649 _nfs4_proc_getattr(server, fhandle, fattr),
1651 } while (exception.retry);
1656 * The file is not closed if it is opened due to the a request to change
1657 * the size of the file. The open call will not be needed once the
1658 * VFS layer lookup-intents are implemented.
1660 * Close is called when the inode is destroyed.
1661 * If we haven't opened the file for O_WRONLY, we
1662 * need to in the size_change case to obtain a stateid.
1665 * Because OPEN is always done by name in nfsv4, it is
1666 * possible that we opened a different file by the same
1667 * name. We can recognize this race condition, but we
1668 * can't do anything about it besides returning an error.
1670 * This will be fixed with VFS changes (lookup-intent).
1673 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1674 struct iattr *sattr)
1676 struct inode *inode = dentry->d_inode;
1677 struct rpc_cred *cred = NULL;
1678 struct nfs4_state *state = NULL;
1681 nfs_fattr_init(fattr);
1683 /* Search for an existing open(O_WRITE) file */
1684 if (sattr->ia_valid & ATTR_FILE) {
1685 struct nfs_open_context *ctx;
1687 ctx = nfs_file_open_context(sattr->ia_file);
1694 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1696 nfs_setattr_update_inode(inode, sattr);
1700 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1701 const struct qstr *name, struct nfs_fh *fhandle,
1702 struct nfs_fattr *fattr)
1705 struct nfs4_lookup_arg args = {
1706 .bitmask = server->attr_bitmask,
1710 struct nfs4_lookup_res res = {
1715 struct rpc_message msg = {
1716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1721 nfs_fattr_init(fattr);
1723 dprintk("NFS call lookupfh %s\n", name->name);
1724 status = rpc_call_sync(server->client, &msg, 0);
1725 dprintk("NFS reply lookupfh: %d\n", status);
1729 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1730 struct qstr *name, struct nfs_fh *fhandle,
1731 struct nfs_fattr *fattr)
1733 struct nfs4_exception exception = { };
1736 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1738 if (err == -NFS4ERR_MOVED) {
1742 err = nfs4_handle_exception(server, err, &exception);
1743 } while (exception.retry);
1747 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1748 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1752 dprintk("NFS call lookup %s\n", name->name);
1753 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1754 if (status == -NFS4ERR_MOVED)
1755 status = nfs4_get_referral(dir, name, fattr, fhandle);
1756 dprintk("NFS reply lookup: %d\n", status);
1760 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1762 struct nfs4_exception exception = { };
1765 err = nfs4_handle_exception(NFS_SERVER(dir),
1766 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1768 } while (exception.retry);
1772 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1774 struct nfs_server *server = NFS_SERVER(inode);
1775 struct nfs_fattr fattr;
1776 struct nfs4_accessargs args = {
1777 .fh = NFS_FH(inode),
1778 .bitmask = server->attr_bitmask,
1780 struct nfs4_accessres res = {
1784 struct rpc_message msg = {
1785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1788 .rpc_cred = entry->cred,
1790 int mode = entry->mask;
1794 * Determine which access bits we want to ask for...
1796 if (mode & MAY_READ)
1797 args.access |= NFS4_ACCESS_READ;
1798 if (S_ISDIR(inode->i_mode)) {
1799 if (mode & MAY_WRITE)
1800 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1801 if (mode & MAY_EXEC)
1802 args.access |= NFS4_ACCESS_LOOKUP;
1804 if (mode & MAY_WRITE)
1805 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1806 if (mode & MAY_EXEC)
1807 args.access |= NFS4_ACCESS_EXECUTE;
1809 nfs_fattr_init(&fattr);
1810 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1813 if (res.access & NFS4_ACCESS_READ)
1814 entry->mask |= MAY_READ;
1815 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1816 entry->mask |= MAY_WRITE;
1817 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1818 entry->mask |= MAY_EXEC;
1819 nfs_refresh_inode(inode, &fattr);
1824 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1826 struct nfs4_exception exception = { };
1829 err = nfs4_handle_exception(NFS_SERVER(inode),
1830 _nfs4_proc_access(inode, entry),
1832 } while (exception.retry);
1837 * TODO: For the time being, we don't try to get any attributes
1838 * along with any of the zero-copy operations READ, READDIR,
1841 * In the case of the first three, we want to put the GETATTR
1842 * after the read-type operation -- this is because it is hard
1843 * to predict the length of a GETATTR response in v4, and thus
1844 * align the READ data correctly. This means that the GETATTR
1845 * may end up partially falling into the page cache, and we should
1846 * shift it into the 'tail' of the xdr_buf before processing.
1847 * To do this efficiently, we need to know the total length
1848 * of data received, which doesn't seem to be available outside
1851 * In the case of WRITE, we also want to put the GETATTR after
1852 * the operation -- in this case because we want to make sure
1853 * we get the post-operation mtime and size. This means that
1854 * we can't use xdr_encode_pages() as written: we need a variant
1855 * of it which would leave room in the 'tail' iovec.
1857 * Both of these changes to the XDR layer would in fact be quite
1858 * minor, but I decided to leave them for a subsequent patch.
1860 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1861 unsigned int pgbase, unsigned int pglen)
1863 struct nfs4_readlink args = {
1864 .fh = NFS_FH(inode),
1869 struct rpc_message msg = {
1870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1875 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1878 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1879 unsigned int pgbase, unsigned int pglen)
1881 struct nfs4_exception exception = { };
1884 err = nfs4_handle_exception(NFS_SERVER(inode),
1885 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1887 } while (exception.retry);
1893 * We will need to arrange for the VFS layer to provide an atomic open.
1894 * Until then, this create/open method is prone to inefficiency and race
1895 * conditions due to the lookup, create, and open VFS calls from sys_open()
1896 * placed on the wire.
1898 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1899 * The file will be opened again in the subsequent VFS open call
1900 * (nfs4_proc_file_open).
1902 * The open for read will just hang around to be used by any process that
1903 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1907 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1908 int flags, struct nameidata *nd)
1910 struct path path = {
1911 .mnt = nd->path.mnt,
1914 struct nfs4_state *state;
1915 struct rpc_cred *cred;
1918 cred = rpc_lookup_cred();
1920 status = PTR_ERR(cred);
1923 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1925 if (IS_ERR(state)) {
1926 status = PTR_ERR(state);
1929 d_add(dentry, igrab(state->inode));
1930 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1931 if (flags & O_EXCL) {
1932 struct nfs_fattr fattr;
1933 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
1935 nfs_setattr_update_inode(state->inode, sattr);
1936 nfs_post_op_update_inode(state->inode, &fattr);
1938 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1939 status = nfs4_intent_set_file(nd, &path, state);
1941 nfs4_close_sync(&path, state, flags);
1948 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1950 struct nfs_server *server = NFS_SERVER(dir);
1951 struct nfs_removeargs args = {
1953 .name.len = name->len,
1954 .name.name = name->name,
1955 .bitmask = server->attr_bitmask,
1957 struct nfs_removeres res = {
1960 struct rpc_message msg = {
1961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1967 nfs_fattr_init(&res.dir_attr);
1968 status = rpc_call_sync(server->client, &msg, 0);
1970 update_changeattr(dir, &res.cinfo);
1971 nfs_post_op_update_inode(dir, &res.dir_attr);
1976 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1978 struct nfs4_exception exception = { };
1981 err = nfs4_handle_exception(NFS_SERVER(dir),
1982 _nfs4_proc_remove(dir, name),
1984 } while (exception.retry);
1988 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1990 struct nfs_server *server = NFS_SERVER(dir);
1991 struct nfs_removeargs *args = msg->rpc_argp;
1992 struct nfs_removeres *res = msg->rpc_resp;
1994 args->bitmask = server->attr_bitmask;
1995 res->server = server;
1996 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1999 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2001 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2003 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
2005 update_changeattr(dir, &res->cinfo);
2006 nfs_post_op_update_inode(dir, &res->dir_attr);
2010 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2011 struct inode *new_dir, struct qstr *new_name)
2013 struct nfs_server *server = NFS_SERVER(old_dir);
2014 struct nfs4_rename_arg arg = {
2015 .old_dir = NFS_FH(old_dir),
2016 .new_dir = NFS_FH(new_dir),
2017 .old_name = old_name,
2018 .new_name = new_name,
2019 .bitmask = server->attr_bitmask,
2021 struct nfs_fattr old_fattr, new_fattr;
2022 struct nfs4_rename_res res = {
2024 .old_fattr = &old_fattr,
2025 .new_fattr = &new_fattr,
2027 struct rpc_message msg = {
2028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2034 nfs_fattr_init(res.old_fattr);
2035 nfs_fattr_init(res.new_fattr);
2036 status = rpc_call_sync(server->client, &msg, 0);
2039 update_changeattr(old_dir, &res.old_cinfo);
2040 nfs_post_op_update_inode(old_dir, res.old_fattr);
2041 update_changeattr(new_dir, &res.new_cinfo);
2042 nfs_post_op_update_inode(new_dir, res.new_fattr);
2047 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2048 struct inode *new_dir, struct qstr *new_name)
2050 struct nfs4_exception exception = { };
2053 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2054 _nfs4_proc_rename(old_dir, old_name,
2057 } while (exception.retry);
2061 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2063 struct nfs_server *server = NFS_SERVER(inode);
2064 struct nfs4_link_arg arg = {
2065 .fh = NFS_FH(inode),
2066 .dir_fh = NFS_FH(dir),
2068 .bitmask = server->attr_bitmask,
2070 struct nfs_fattr fattr, dir_attr;
2071 struct nfs4_link_res res = {
2074 .dir_attr = &dir_attr,
2076 struct rpc_message msg = {
2077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2083 nfs_fattr_init(res.fattr);
2084 nfs_fattr_init(res.dir_attr);
2085 status = rpc_call_sync(server->client, &msg, 0);
2087 update_changeattr(dir, &res.cinfo);
2088 nfs_post_op_update_inode(dir, res.dir_attr);
2089 nfs_post_op_update_inode(inode, res.fattr);
2095 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2097 struct nfs4_exception exception = { };
2100 err = nfs4_handle_exception(NFS_SERVER(inode),
2101 _nfs4_proc_link(inode, dir, name),
2103 } while (exception.retry);
2107 struct nfs4_createdata {
2108 struct rpc_message msg;
2109 struct nfs4_create_arg arg;
2110 struct nfs4_create_res res;
2112 struct nfs_fattr fattr;
2113 struct nfs_fattr dir_fattr;
2116 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2117 struct qstr *name, struct iattr *sattr, u32 ftype)
2119 struct nfs4_createdata *data;
2121 data = kzalloc(sizeof(*data), GFP_KERNEL);
2123 struct nfs_server *server = NFS_SERVER(dir);
2125 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2126 data->msg.rpc_argp = &data->arg;
2127 data->msg.rpc_resp = &data->res;
2128 data->arg.dir_fh = NFS_FH(dir);
2129 data->arg.server = server;
2130 data->arg.name = name;
2131 data->arg.attrs = sattr;
2132 data->arg.ftype = ftype;
2133 data->arg.bitmask = server->attr_bitmask;
2134 data->res.server = server;
2135 data->res.fh = &data->fh;
2136 data->res.fattr = &data->fattr;
2137 data->res.dir_fattr = &data->dir_fattr;
2138 nfs_fattr_init(data->res.fattr);
2139 nfs_fattr_init(data->res.dir_fattr);
2144 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2146 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2148 update_changeattr(dir, &data->res.dir_cinfo);
2149 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2150 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2155 static void nfs4_free_createdata(struct nfs4_createdata *data)
2160 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2161 struct page *page, unsigned int len, struct iattr *sattr)
2163 struct nfs4_createdata *data;
2164 int status = -ENAMETOOLONG;
2166 if (len > NFS4_MAXPATHLEN)
2170 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2174 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2175 data->arg.u.symlink.pages = &page;
2176 data->arg.u.symlink.len = len;
2178 status = nfs4_do_create(dir, dentry, data);
2180 nfs4_free_createdata(data);
2185 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2186 struct page *page, unsigned int len, struct iattr *sattr)
2188 struct nfs4_exception exception = { };
2191 err = nfs4_handle_exception(NFS_SERVER(dir),
2192 _nfs4_proc_symlink(dir, dentry, page,
2195 } while (exception.retry);
2199 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2200 struct iattr *sattr)
2202 struct nfs4_createdata *data;
2203 int status = -ENOMEM;
2205 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2209 status = nfs4_do_create(dir, dentry, data);
2211 nfs4_free_createdata(data);
2216 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2217 struct iattr *sattr)
2219 struct nfs4_exception exception = { };
2222 err = nfs4_handle_exception(NFS_SERVER(dir),
2223 _nfs4_proc_mkdir(dir, dentry, sattr),
2225 } while (exception.retry);
2229 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2230 u64 cookie, struct page *page, unsigned int count, int plus)
2232 struct inode *dir = dentry->d_inode;
2233 struct nfs4_readdir_arg args = {
2238 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2240 struct nfs4_readdir_res res;
2241 struct rpc_message msg = {
2242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2249 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2250 dentry->d_parent->d_name.name,
2251 dentry->d_name.name,
2252 (unsigned long long)cookie);
2253 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2254 res.pgbase = args.pgbase;
2255 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2257 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2259 nfs_invalidate_atime(dir);
2261 dprintk("%s: returns %d\n", __func__, status);
2265 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2266 u64 cookie, struct page *page, unsigned int count, int plus)
2268 struct nfs4_exception exception = { };
2271 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2272 _nfs4_proc_readdir(dentry, cred, cookie,
2275 } while (exception.retry);
2279 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2280 struct iattr *sattr, dev_t rdev)
2282 struct nfs4_createdata *data;
2283 int mode = sattr->ia_mode;
2284 int status = -ENOMEM;
2286 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2287 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2289 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2294 data->arg.ftype = NF4FIFO;
2295 else if (S_ISBLK(mode)) {
2296 data->arg.ftype = NF4BLK;
2297 data->arg.u.device.specdata1 = MAJOR(rdev);
2298 data->arg.u.device.specdata2 = MINOR(rdev);
2300 else if (S_ISCHR(mode)) {
2301 data->arg.ftype = NF4CHR;
2302 data->arg.u.device.specdata1 = MAJOR(rdev);
2303 data->arg.u.device.specdata2 = MINOR(rdev);
2306 status = nfs4_do_create(dir, dentry, data);
2308 nfs4_free_createdata(data);
2313 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2314 struct iattr *sattr, dev_t rdev)
2316 struct nfs4_exception exception = { };
2319 err = nfs4_handle_exception(NFS_SERVER(dir),
2320 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2322 } while (exception.retry);
2326 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2327 struct nfs_fsstat *fsstat)
2329 struct nfs4_statfs_arg args = {
2331 .bitmask = server->attr_bitmask,
2333 struct rpc_message msg = {
2334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2339 nfs_fattr_init(fsstat->fattr);
2340 return rpc_call_sync(server->client, &msg, 0);
2343 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2345 struct nfs4_exception exception = { };
2348 err = nfs4_handle_exception(server,
2349 _nfs4_proc_statfs(server, fhandle, fsstat),
2351 } while (exception.retry);
2355 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2356 struct nfs_fsinfo *fsinfo)
2358 struct nfs4_fsinfo_arg args = {
2360 .bitmask = server->attr_bitmask,
2362 struct rpc_message msg = {
2363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2368 return rpc_call_sync(server->client, &msg, 0);
2371 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2373 struct nfs4_exception exception = { };
2377 err = nfs4_handle_exception(server,
2378 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2380 } while (exception.retry);
2384 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2386 nfs_fattr_init(fsinfo->fattr);
2387 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2390 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2391 struct nfs_pathconf *pathconf)
2393 struct nfs4_pathconf_arg args = {
2395 .bitmask = server->attr_bitmask,
2397 struct rpc_message msg = {
2398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2400 .rpc_resp = pathconf,
2403 /* None of the pathconf attributes are mandatory to implement */
2404 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2405 memset(pathconf, 0, sizeof(*pathconf));
2409 nfs_fattr_init(pathconf->fattr);
2410 return rpc_call_sync(server->client, &msg, 0);
2413 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2414 struct nfs_pathconf *pathconf)
2416 struct nfs4_exception exception = { };
2420 err = nfs4_handle_exception(server,
2421 _nfs4_proc_pathconf(server, fhandle, pathconf),
2423 } while (exception.retry);
2427 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2429 struct nfs_server *server = NFS_SERVER(data->inode);
2431 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2432 rpc_restart_call(task);
2436 nfs_invalidate_atime(data->inode);
2437 if (task->tk_status > 0)
2438 renew_lease(server, data->timestamp);
2442 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2444 data->timestamp = jiffies;
2445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2448 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2450 struct inode *inode = data->inode;
2452 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2453 rpc_restart_call(task);
2456 if (task->tk_status >= 0) {
2457 renew_lease(NFS_SERVER(inode), data->timestamp);
2458 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2463 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2465 struct nfs_server *server = NFS_SERVER(data->inode);
2467 data->args.bitmask = server->attr_bitmask;
2468 data->res.server = server;
2469 data->timestamp = jiffies;
2471 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
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, struct rpc_message *msg)
2488 struct nfs_server *server = NFS_SERVER(data->inode);
2490 data->args.bitmask = server->attr_bitmask;
2491 data->res.server = server;
2492 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2496 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2497 * standalone procedure for queueing an asynchronous RENEW.
2499 static void nfs4_renew_done(struct rpc_task *task, void *data)
2501 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2502 unsigned long timestamp = (unsigned long)data;
2504 if (task->tk_status < 0) {
2505 switch (task->tk_status) {
2506 case -NFS4ERR_STALE_CLIENTID:
2507 case -NFS4ERR_EXPIRED:
2508 case -NFS4ERR_CB_PATH_DOWN:
2509 nfs4_schedule_state_recovery(clp);
2513 spin_lock(&clp->cl_lock);
2514 if (time_before(clp->cl_last_renewal,timestamp))
2515 clp->cl_last_renewal = timestamp;
2516 spin_unlock(&clp->cl_lock);
2519 static const struct rpc_call_ops nfs4_renew_ops = {
2520 .rpc_call_done = nfs4_renew_done,
2523 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2525 struct rpc_message msg = {
2526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2531 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2532 &nfs4_renew_ops, (void *)jiffies);
2535 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2537 struct rpc_message msg = {
2538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2542 unsigned long now = jiffies;
2545 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2548 spin_lock(&clp->cl_lock);
2549 if (time_before(clp->cl_last_renewal,now))
2550 clp->cl_last_renewal = now;
2551 spin_unlock(&clp->cl_lock);
2555 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2557 return (server->caps & NFS_CAP_ACLS)
2558 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2559 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2562 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2563 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2566 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2568 static void buf_to_pages(const void *buf, size_t buflen,
2569 struct page **pages, unsigned int *pgbase)
2571 const void *p = buf;
2573 *pgbase = offset_in_page(buf);
2575 while (p < buf + buflen) {
2576 *(pages++) = virt_to_page(p);
2577 p += PAGE_CACHE_SIZE;
2581 struct nfs4_cached_acl {
2587 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2589 struct nfs_inode *nfsi = NFS_I(inode);
2591 spin_lock(&inode->i_lock);
2592 kfree(nfsi->nfs4_acl);
2593 nfsi->nfs4_acl = acl;
2594 spin_unlock(&inode->i_lock);
2597 static void nfs4_zap_acl_attr(struct inode *inode)
2599 nfs4_set_cached_acl(inode, NULL);
2602 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2604 struct nfs_inode *nfsi = NFS_I(inode);
2605 struct nfs4_cached_acl *acl;
2608 spin_lock(&inode->i_lock);
2609 acl = nfsi->nfs4_acl;
2612 if (buf == NULL) /* user is just asking for length */
2614 if (acl->cached == 0)
2616 ret = -ERANGE; /* see getxattr(2) man page */
2617 if (acl->len > buflen)
2619 memcpy(buf, acl->data, acl->len);
2623 spin_unlock(&inode->i_lock);
2627 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2629 struct nfs4_cached_acl *acl;
2631 if (buf && acl_len <= PAGE_SIZE) {
2632 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2636 memcpy(acl->data, buf, acl_len);
2638 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2645 nfs4_set_cached_acl(inode, acl);
2648 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2650 struct page *pages[NFS4ACL_MAXPAGES];
2651 struct nfs_getaclargs args = {
2652 .fh = NFS_FH(inode),
2656 size_t resp_len = buflen;
2658 struct rpc_message msg = {
2659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2661 .rpc_resp = &resp_len,
2663 struct page *localpage = NULL;
2666 if (buflen < PAGE_SIZE) {
2667 /* As long as we're doing a round trip to the server anyway,
2668 * let's be prepared for a page of acl data. */
2669 localpage = alloc_page(GFP_KERNEL);
2670 resp_buf = page_address(localpage);
2671 if (localpage == NULL)
2673 args.acl_pages[0] = localpage;
2674 args.acl_pgbase = 0;
2675 resp_len = args.acl_len = PAGE_SIZE;
2678 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2680 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2683 if (resp_len > args.acl_len)
2684 nfs4_write_cached_acl(inode, NULL, resp_len);
2686 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2689 if (resp_len > buflen)
2692 memcpy(buf, resp_buf, resp_len);
2697 __free_page(localpage);
2701 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2703 struct nfs4_exception exception = { };
2706 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2709 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2710 } while (exception.retry);
2714 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2716 struct nfs_server *server = NFS_SERVER(inode);
2719 if (!nfs4_server_supports_acls(server))
2721 ret = nfs_revalidate_inode(server, inode);
2724 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2725 nfs_zap_acl_cache(inode);
2726 ret = nfs4_read_cached_acl(inode, buf, buflen);
2729 return nfs4_get_acl_uncached(inode, buf, buflen);
2732 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2734 struct nfs_server *server = NFS_SERVER(inode);
2735 struct page *pages[NFS4ACL_MAXPAGES];
2736 struct nfs_setaclargs arg = {
2737 .fh = NFS_FH(inode),
2741 struct rpc_message msg = {
2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2748 if (!nfs4_server_supports_acls(server))
2750 nfs_inode_return_delegation(inode);
2751 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2752 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2753 nfs_access_zap_cache(inode);
2754 nfs_zap_acl_cache(inode);
2758 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2760 struct nfs4_exception exception = { };
2763 err = nfs4_handle_exception(NFS_SERVER(inode),
2764 __nfs4_proc_set_acl(inode, buf, buflen),
2766 } while (exception.retry);
2771 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2773 struct nfs_client *clp = server->nfs_client;
2775 if (!clp || task->tk_status >= 0)
2777 switch(task->tk_status) {
2778 case -NFS4ERR_STALE_CLIENTID:
2779 case -NFS4ERR_STALE_STATEID:
2780 case -NFS4ERR_EXPIRED:
2781 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2782 nfs4_schedule_state_recovery(clp);
2783 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2784 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2785 task->tk_status = 0;
2787 case -NFS4ERR_DELAY:
2788 nfs_inc_server_stats(server, NFSIOS_DELAY);
2789 case -NFS4ERR_GRACE:
2790 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2791 task->tk_status = 0;
2793 case -NFS4ERR_OLD_STATEID:
2794 task->tk_status = 0;
2797 task->tk_status = nfs4_map_errors(task->tk_status);
2801 static int nfs4_wait_bit_killable(void *word)
2803 if (fatal_signal_pending(current))
2804 return -ERESTARTSYS;
2809 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2815 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2817 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2818 nfs4_wait_bit_killable, TASK_KILLABLE);
2820 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2824 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2831 *timeout = NFS4_POLL_RETRY_MIN;
2832 if (*timeout > NFS4_POLL_RETRY_MAX)
2833 *timeout = NFS4_POLL_RETRY_MAX;
2834 schedule_timeout_killable(*timeout);
2835 if (fatal_signal_pending(current))
2841 /* This is the error handling routine for processes that are allowed
2844 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2846 struct nfs_client *clp = server->nfs_client;
2847 int ret = errorcode;
2849 exception->retry = 0;
2853 case -NFS4ERR_STALE_CLIENTID:
2854 case -NFS4ERR_STALE_STATEID:
2855 case -NFS4ERR_EXPIRED:
2856 nfs4_schedule_state_recovery(clp);
2857 ret = nfs4_wait_clnt_recover(server->client, clp);
2859 exception->retry = 1;
2861 case -NFS4ERR_FILE_OPEN:
2862 case -NFS4ERR_GRACE:
2863 case -NFS4ERR_DELAY:
2864 ret = nfs4_delay(server->client, &exception->timeout);
2867 case -NFS4ERR_OLD_STATEID:
2868 exception->retry = 1;
2870 /* We failed to handle the error */
2871 return nfs4_map_errors(ret);
2874 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2876 nfs4_verifier sc_verifier;
2877 struct nfs4_setclientid setclientid = {
2878 .sc_verifier = &sc_verifier,
2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2883 .rpc_argp = &setclientid,
2891 p = (__be32*)sc_verifier.data;
2892 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2893 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2896 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2897 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2899 rpc_peeraddr2str(clp->cl_rpcclient,
2901 rpc_peeraddr2str(clp->cl_rpcclient,
2903 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2904 clp->cl_id_uniquifier);
2905 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2906 sizeof(setclientid.sc_netid),
2907 rpc_peeraddr2str(clp->cl_rpcclient,
2908 RPC_DISPLAY_NETID));
2909 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2910 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2911 clp->cl_ipaddr, port >> 8, port & 255);
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status != -NFS4ERR_CLID_INUSE)
2919 ssleep(clp->cl_lease_time + 1);
2921 if (++clp->cl_id_uniquifier == 0)
2927 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2929 struct nfs_fsinfo fsinfo;
2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2933 .rpc_resp = &fsinfo,
2940 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2942 spin_lock(&clp->cl_lock);
2943 clp->cl_lease_time = fsinfo.lease_time * HZ;
2944 clp->cl_last_renewal = now;
2945 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2946 spin_unlock(&clp->cl_lock);
2951 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2956 err = _nfs4_proc_setclientid_confirm(clp, cred);
2960 case -NFS4ERR_RESOURCE:
2961 /* The IBM lawyers misread another document! */
2962 case -NFS4ERR_DELAY:
2963 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2969 struct nfs4_delegreturndata {
2970 struct nfs4_delegreturnargs args;
2971 struct nfs4_delegreturnres res;
2973 nfs4_stateid stateid;
2974 unsigned long timestamp;
2975 struct nfs_fattr fattr;
2979 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2981 struct nfs4_delegreturndata *data = calldata;
2982 data->rpc_status = task->tk_status;
2983 if (data->rpc_status == 0)
2984 renew_lease(data->res.server, data->timestamp);
2987 static void nfs4_delegreturn_release(void *calldata)
2992 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2993 .rpc_call_done = nfs4_delegreturn_done,
2994 .rpc_release = nfs4_delegreturn_release,
2997 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
2999 struct nfs4_delegreturndata *data;
3000 struct nfs_server *server = NFS_SERVER(inode);
3001 struct rpc_task *task;
3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3006 struct rpc_task_setup task_setup_data = {
3007 .rpc_client = server->client,
3008 .rpc_message = &msg,
3009 .callback_ops = &nfs4_delegreturn_ops,
3010 .flags = RPC_TASK_ASYNC,
3014 data = kmalloc(sizeof(*data), GFP_KERNEL);
3017 data->args.fhandle = &data->fh;
3018 data->args.stateid = &data->stateid;
3019 data->args.bitmask = server->attr_bitmask;
3020 nfs_copy_fh(&data->fh, NFS_FH(inode));
3021 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3022 data->res.fattr = &data->fattr;
3023 data->res.server = server;
3024 nfs_fattr_init(data->res.fattr);
3025 data->timestamp = jiffies;
3026 data->rpc_status = 0;
3028 task_setup_data.callback_data = data;
3029 msg.rpc_argp = &data->args,
3030 msg.rpc_resp = &data->res,
3031 task = rpc_run_task(&task_setup_data);
3033 return PTR_ERR(task);
3036 status = nfs4_wait_for_completion_rpc_task(task);
3039 status = data->rpc_status;
3042 nfs_refresh_inode(inode, &data->fattr);
3048 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3050 struct nfs_server *server = NFS_SERVER(inode);
3051 struct nfs4_exception exception = { };
3054 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3056 case -NFS4ERR_STALE_STATEID:
3057 case -NFS4ERR_EXPIRED:
3061 err = nfs4_handle_exception(server, err, &exception);
3062 } while (exception.retry);
3066 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3067 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3070 * sleep, with exponential backoff, and retry the LOCK operation.
3072 static unsigned long
3073 nfs4_set_lock_task_retry(unsigned long timeout)
3075 schedule_timeout_killable(timeout);
3077 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3078 return NFS4_LOCK_MAXTIMEOUT;
3082 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3084 struct inode *inode = state->inode;
3085 struct nfs_server *server = NFS_SERVER(inode);
3086 struct nfs_client *clp = server->nfs_client;
3087 struct nfs_lockt_args arg = {
3088 .fh = NFS_FH(inode),
3091 struct nfs_lockt_res res = {
3094 struct rpc_message msg = {
3095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3098 .rpc_cred = state->owner->so_cred,
3100 struct nfs4_lock_state *lsp;
3103 down_read(&clp->cl_sem);
3104 arg.lock_owner.clientid = clp->cl_clientid;
3105 status = nfs4_set_lock_state(state, request);
3108 lsp = request->fl_u.nfs4_fl.owner;
3109 arg.lock_owner.id = lsp->ls_id.id;
3110 status = rpc_call_sync(server->client, &msg, 0);
3113 request->fl_type = F_UNLCK;
3115 case -NFS4ERR_DENIED:
3118 request->fl_ops->fl_release_private(request);
3120 up_read(&clp->cl_sem);
3124 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3126 struct nfs4_exception exception = { };
3130 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3131 _nfs4_proc_getlk(state, cmd, request),
3133 } while (exception.retry);
3137 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3140 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3142 res = posix_lock_file_wait(file, fl);
3145 res = flock_lock_file_wait(file, fl);
3153 struct nfs4_unlockdata {
3154 struct nfs_locku_args arg;
3155 struct nfs_locku_res res;
3156 struct nfs4_lock_state *lsp;
3157 struct nfs_open_context *ctx;
3158 struct file_lock fl;
3159 const struct nfs_server *server;
3160 unsigned long timestamp;
3163 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3164 struct nfs_open_context *ctx,
3165 struct nfs4_lock_state *lsp,
3166 struct nfs_seqid *seqid)
3168 struct nfs4_unlockdata *p;
3169 struct inode *inode = lsp->ls_state->inode;
3171 p = kmalloc(sizeof(*p), GFP_KERNEL);
3174 p->arg.fh = NFS_FH(inode);
3176 p->arg.seqid = seqid;
3177 p->res.seqid = seqid;
3178 p->arg.stateid = &lsp->ls_stateid;
3180 atomic_inc(&lsp->ls_count);
3181 /* Ensure we don't close file until we're done freeing locks! */
3182 p->ctx = get_nfs_open_context(ctx);
3183 memcpy(&p->fl, fl, sizeof(p->fl));
3184 p->server = NFS_SERVER(inode);
3188 static void nfs4_locku_release_calldata(void *data)
3190 struct nfs4_unlockdata *calldata = data;
3191 nfs_free_seqid(calldata->arg.seqid);
3192 nfs4_put_lock_state(calldata->lsp);
3193 put_nfs_open_context(calldata->ctx);
3197 static void nfs4_locku_done(struct rpc_task *task, void *data)
3199 struct nfs4_unlockdata *calldata = data;
3201 if (RPC_ASSASSINATED(task))
3203 switch (task->tk_status) {
3205 memcpy(calldata->lsp->ls_stateid.data,
3206 calldata->res.stateid.data,
3207 sizeof(calldata->lsp->ls_stateid.data));
3208 renew_lease(calldata->server, calldata->timestamp);
3210 case -NFS4ERR_STALE_STATEID:
3211 case -NFS4ERR_EXPIRED:
3214 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3215 rpc_restart_call(task);
3219 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3221 struct nfs4_unlockdata *calldata = data;
3223 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3225 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3226 /* Note: exit _without_ running nfs4_locku_done */
3227 task->tk_action = NULL;
3230 calldata->timestamp = jiffies;
3231 rpc_call_start(task);
3234 static const struct rpc_call_ops nfs4_locku_ops = {
3235 .rpc_call_prepare = nfs4_locku_prepare,
3236 .rpc_call_done = nfs4_locku_done,
3237 .rpc_release = nfs4_locku_release_calldata,
3240 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3241 struct nfs_open_context *ctx,
3242 struct nfs4_lock_state *lsp,
3243 struct nfs_seqid *seqid)
3245 struct nfs4_unlockdata *data;
3246 struct rpc_message msg = {
3247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3248 .rpc_cred = ctx->cred,
3250 struct rpc_task_setup task_setup_data = {
3251 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3252 .rpc_message = &msg,
3253 .callback_ops = &nfs4_locku_ops,
3254 .workqueue = nfsiod_workqueue,
3255 .flags = RPC_TASK_ASYNC,
3258 /* Ensure this is an unlock - when canceling a lock, the
3259 * canceled lock is passed in, and it won't be an unlock.
3261 fl->fl_type = F_UNLCK;
3263 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3265 nfs_free_seqid(seqid);
3266 return ERR_PTR(-ENOMEM);
3269 msg.rpc_argp = &data->arg,
3270 msg.rpc_resp = &data->res,
3271 task_setup_data.callback_data = data;
3272 return rpc_run_task(&task_setup_data);
3275 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3277 struct nfs_seqid *seqid;
3278 struct nfs4_lock_state *lsp;
3279 struct rpc_task *task;
3281 unsigned char fl_flags = request->fl_flags;
3283 status = nfs4_set_lock_state(state, request);
3284 /* Unlock _before_ we do the RPC call */
3285 request->fl_flags |= FL_EXISTS;
3286 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3290 /* Is this a delegated lock? */
3291 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3293 lsp = request->fl_u.nfs4_fl.owner;
3294 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3298 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3299 status = PTR_ERR(task);
3302 status = nfs4_wait_for_completion_rpc_task(task);
3305 request->fl_flags = fl_flags;
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.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3334 if (p->arg.open_seqid == NULL)
3336 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3337 if (p->arg.lock_seqid == NULL)
3338 goto out_free_seqid;
3339 p->arg.lock_stateid = &lsp->ls_stateid;
3340 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3341 p->arg.lock_owner.id = lsp->ls_id.id;
3342 p->res.lock_seqid = p->arg.lock_seqid;
3344 atomic_inc(&lsp->ls_count);
3345 p->ctx = get_nfs_open_context(ctx);
3346 memcpy(&p->fl, fl, sizeof(p->fl));
3349 nfs_free_seqid(p->arg.open_seqid);
3355 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3357 struct nfs4_lockdata *data = calldata;
3358 struct nfs4_state *state = data->lsp->ls_state;
3360 dprintk("%s: begin!\n", __func__);
3361 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3363 /* Do we need to do an open_to_lock_owner? */
3364 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3365 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3367 data->arg.open_stateid = &state->stateid;
3368 data->arg.new_lock_owner = 1;
3369 data->res.open_seqid = data->arg.open_seqid;
3371 data->arg.new_lock_owner = 0;
3372 data->timestamp = jiffies;
3373 rpc_call_start(task);
3374 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3377 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3379 struct nfs4_lockdata *data = calldata;
3381 dprintk("%s: begin!\n", __func__);
3383 data->rpc_status = task->tk_status;
3384 if (RPC_ASSASSINATED(task))
3386 if (data->arg.new_lock_owner != 0) {
3387 if (data->rpc_status == 0)
3388 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3392 if (data->rpc_status == 0) {
3393 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3394 sizeof(data->lsp->ls_stateid.data));
3395 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3396 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3399 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3402 static void nfs4_lock_release(void *calldata)
3404 struct nfs4_lockdata *data = calldata;
3406 dprintk("%s: begin!\n", __func__);
3407 nfs_free_seqid(data->arg.open_seqid);
3408 if (data->cancelled != 0) {
3409 struct rpc_task *task;
3410 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3411 data->arg.lock_seqid);
3414 dprintk("%s: cancelling lock!\n", __func__);
3416 nfs_free_seqid(data->arg.lock_seqid);
3417 nfs4_put_lock_state(data->lsp);
3418 put_nfs_open_context(data->ctx);
3420 dprintk("%s: done!\n", __func__);
3423 static const struct rpc_call_ops nfs4_lock_ops = {
3424 .rpc_call_prepare = nfs4_lock_prepare,
3425 .rpc_call_done = nfs4_lock_done,
3426 .rpc_release = nfs4_lock_release,
3429 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3431 struct nfs4_lockdata *data;
3432 struct rpc_task *task;
3433 struct rpc_message msg = {
3434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3435 .rpc_cred = state->owner->so_cred,
3437 struct rpc_task_setup task_setup_data = {
3438 .rpc_client = NFS_CLIENT(state->inode),
3439 .rpc_message = &msg,
3440 .callback_ops = &nfs4_lock_ops,
3441 .workqueue = nfsiod_workqueue,
3442 .flags = RPC_TASK_ASYNC,
3446 dprintk("%s: begin!\n", __func__);
3447 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3448 fl->fl_u.nfs4_fl.owner);
3452 data->arg.block = 1;
3454 data->arg.reclaim = 1;
3455 msg.rpc_argp = &data->arg,
3456 msg.rpc_resp = &data->res,
3457 task_setup_data.callback_data = data;
3458 task = rpc_run_task(&task_setup_data);
3460 return PTR_ERR(task);
3461 ret = nfs4_wait_for_completion_rpc_task(task);
3463 ret = data->rpc_status;
3464 if (ret == -NFS4ERR_DENIED)
3467 data->cancelled = 1;
3469 dprintk("%s: done, ret = %d!\n", __func__, ret);
3473 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3475 struct nfs_server *server = NFS_SERVER(state->inode);
3476 struct nfs4_exception exception = { };
3480 /* Cache the lock if possible... */
3481 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3483 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3484 if (err != -NFS4ERR_DELAY)
3486 nfs4_handle_exception(server, err, &exception);
3487 } while (exception.retry);
3491 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3493 struct nfs_server *server = NFS_SERVER(state->inode);
3494 struct nfs4_exception exception = { };
3497 err = nfs4_set_lock_state(state, request);
3501 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3503 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3504 if (err != -NFS4ERR_DELAY)
3506 nfs4_handle_exception(server, err, &exception);
3507 } while (exception.retry);
3511 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3513 struct nfs_client *clp = state->owner->so_client;
3514 unsigned char fl_flags = request->fl_flags;
3517 /* Is this a delegated open? */
3518 status = nfs4_set_lock_state(state, request);
3521 request->fl_flags |= FL_ACCESS;
3522 status = do_vfs_lock(request->fl_file, request);
3525 down_read(&clp->cl_sem);
3526 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3527 struct nfs_inode *nfsi = NFS_I(state->inode);
3528 /* Yes: cache locks! */
3529 down_read(&nfsi->rwsem);
3530 /* ...but avoid races with delegation recall... */
3531 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3532 request->fl_flags = fl_flags & ~FL_SLEEP;
3533 status = do_vfs_lock(request->fl_file, request);
3534 up_read(&nfsi->rwsem);
3537 up_read(&nfsi->rwsem);
3539 status = _nfs4_do_setlk(state, cmd, request, 0);
3542 /* Note: we always want to sleep here! */
3543 request->fl_flags = fl_flags | FL_SLEEP;
3544 if (do_vfs_lock(request->fl_file, request) < 0)
3545 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3547 up_read(&clp->cl_sem);
3549 request->fl_flags = fl_flags;
3553 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3555 struct nfs4_exception exception = { };
3559 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3560 _nfs4_proc_setlk(state, cmd, request),
3562 } while (exception.retry);
3567 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3569 struct nfs_open_context *ctx;
3570 struct nfs4_state *state;
3571 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3574 /* verify open state */
3575 ctx = nfs_file_open_context(filp);
3578 if (request->fl_start < 0 || request->fl_end < 0)
3582 return nfs4_proc_getlk(state, F_GETLK, request);
3584 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3587 if (request->fl_type == F_UNLCK)
3588 return nfs4_proc_unlck(state, cmd, request);
3591 status = nfs4_proc_setlk(state, cmd, request);
3592 if ((status != -EAGAIN) || IS_SETLK(cmd))
3594 timeout = nfs4_set_lock_task_retry(timeout);
3595 status = -ERESTARTSYS;
3598 } while(status < 0);
3602 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3604 struct nfs_server *server = NFS_SERVER(state->inode);
3605 struct nfs4_exception exception = { };
3608 err = nfs4_set_lock_state(state, fl);
3612 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3613 if (err != -NFS4ERR_DELAY)
3615 err = nfs4_handle_exception(server, err, &exception);
3616 } while (exception.retry);
3621 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3623 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3624 size_t buflen, int flags)
3626 struct inode *inode = dentry->d_inode;
3628 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3631 return nfs4_proc_set_acl(inode, buf, buflen);
3634 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3635 * and that's what we'll do for e.g. user attributes that haven't been set.
3636 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3637 * attributes in kernel-managed attribute namespaces. */
3638 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3641 struct inode *inode = dentry->d_inode;
3643 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3646 return nfs4_proc_get_acl(inode, buf, buflen);
3649 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3651 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3653 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3655 if (buf && buflen < len)
3658 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3662 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3663 struct nfs4_fs_locations *fs_locations, struct page *page)
3665 struct nfs_server *server = NFS_SERVER(dir);
3667 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3668 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3670 struct nfs4_fs_locations_arg args = {
3671 .dir_fh = NFS_FH(dir),
3676 struct rpc_message msg = {
3677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3679 .rpc_resp = fs_locations,
3683 dprintk("%s: start\n", __func__);
3684 nfs_fattr_init(&fs_locations->fattr);
3685 fs_locations->server = server;
3686 fs_locations->nlocations = 0;
3687 status = rpc_call_sync(server->client, &msg, 0);
3688 dprintk("%s: returned status = %d\n", __func__, status);
3692 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3693 .recover_open = nfs4_open_reclaim,
3694 .recover_lock = nfs4_lock_reclaim,
3697 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3698 .recover_open = nfs4_open_expired,
3699 .recover_lock = nfs4_lock_expired,
3702 static const struct inode_operations nfs4_file_inode_operations = {
3703 .permission = nfs_permission,
3704 .getattr = nfs_getattr,
3705 .setattr = nfs_setattr,
3706 .getxattr = nfs4_getxattr,
3707 .setxattr = nfs4_setxattr,
3708 .listxattr = nfs4_listxattr,
3711 const struct nfs_rpc_ops nfs_v4_clientops = {
3712 .version = 4, /* protocol version */
3713 .dentry_ops = &nfs4_dentry_operations,
3714 .dir_inode_ops = &nfs4_dir_inode_operations,
3715 .file_inode_ops = &nfs4_file_inode_operations,
3716 .getroot = nfs4_proc_get_root,
3717 .getattr = nfs4_proc_getattr,
3718 .setattr = nfs4_proc_setattr,
3719 .lookupfh = nfs4_proc_lookupfh,
3720 .lookup = nfs4_proc_lookup,
3721 .access = nfs4_proc_access,
3722 .readlink = nfs4_proc_readlink,
3723 .create = nfs4_proc_create,
3724 .remove = nfs4_proc_remove,
3725 .unlink_setup = nfs4_proc_unlink_setup,
3726 .unlink_done = nfs4_proc_unlink_done,
3727 .rename = nfs4_proc_rename,
3728 .link = nfs4_proc_link,
3729 .symlink = nfs4_proc_symlink,
3730 .mkdir = nfs4_proc_mkdir,
3731 .rmdir = nfs4_proc_remove,
3732 .readdir = nfs4_proc_readdir,
3733 .mknod = nfs4_proc_mknod,
3734 .statfs = nfs4_proc_statfs,
3735 .fsinfo = nfs4_proc_fsinfo,
3736 .pathconf = nfs4_proc_pathconf,
3737 .set_capabilities = nfs4_server_capabilities,
3738 .decode_dirent = nfs4_decode_dirent,
3739 .read_setup = nfs4_proc_read_setup,
3740 .read_done = nfs4_read_done,
3741 .write_setup = nfs4_proc_write_setup,
3742 .write_done = nfs4_write_done,
3743 .commit_setup = nfs4_proc_commit_setup,
3744 .commit_done = nfs4_commit_done,
3745 .lock = nfs4_proc_lock,
3746 .clear_acl_cache = nfs4_zap_acl_attr,