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.server = p->o_arg.server;
244 nfs_fattr_init(&p->f_attr);
245 nfs_fattr_init(&p->dir_attr);
248 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
249 struct nfs4_state_owner *sp, int flags,
250 const struct iattr *attrs)
252 struct dentry *parent = dget_parent(path->dentry);
253 struct inode *dir = parent->d_inode;
254 struct nfs_server *server = NFS_SERVER(dir);
255 struct nfs4_opendata *p;
257 p = kzalloc(sizeof(*p), GFP_KERNEL);
260 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
261 if (p->o_arg.seqid == NULL)
263 p->path.mnt = mntget(path->mnt);
264 p->path.dentry = dget(path->dentry);
267 atomic_inc(&sp->so_count);
268 p->o_arg.fh = NFS_FH(dir);
269 p->o_arg.open_flags = flags,
270 p->o_arg.clientid = server->nfs_client->cl_clientid;
271 p->o_arg.id = sp->so_owner_id.id;
272 p->o_arg.name = &p->path.dentry->d_name;
273 p->o_arg.server = server;
274 p->o_arg.bitmask = server->attr_bitmask;
275 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
276 if (flags & O_EXCL) {
277 u32 *s = (u32 *) p->o_arg.u.verifier.data;
280 } else if (flags & O_CREAT) {
281 p->o_arg.u.attrs = &p->attrs;
282 memcpy(&p->attrs, attrs, sizeof(p->attrs));
284 p->c_arg.fh = &p->o_res.fh;
285 p->c_arg.stateid = &p->o_res.stateid;
286 p->c_arg.seqid = p->o_arg.seqid;
287 nfs4_init_opendata_res(p);
297 static void nfs4_opendata_free(struct kref *kref)
299 struct nfs4_opendata *p = container_of(kref,
300 struct nfs4_opendata, kref);
302 nfs_free_seqid(p->o_arg.seqid);
303 if (p->state != NULL)
304 nfs4_put_open_state(p->state);
305 nfs4_put_state_owner(p->owner);
307 dput(p->path.dentry);
312 static void nfs4_opendata_put(struct nfs4_opendata *p)
315 kref_put(&p->kref, nfs4_opendata_free);
318 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
322 ret = rpc_wait_for_completion_task(task);
326 static int can_open_cached(struct nfs4_state *state, int mode)
329 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
331 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
334 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
336 case FMODE_READ|FMODE_WRITE:
337 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
342 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
344 if ((delegation->type & open_flags) != open_flags)
346 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
351 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
353 switch (open_flags) {
360 case FMODE_READ|FMODE_WRITE:
363 nfs4_state_set_mode_locked(state, state->state | open_flags);
366 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
368 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
369 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
370 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
371 switch (open_flags) {
373 set_bit(NFS_O_RDONLY_STATE, &state->flags);
376 set_bit(NFS_O_WRONLY_STATE, &state->flags);
378 case FMODE_READ|FMODE_WRITE:
379 set_bit(NFS_O_RDWR_STATE, &state->flags);
383 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
385 write_seqlock(&state->seqlock);
386 nfs_set_open_stateid_locked(state, stateid, open_flags);
387 write_sequnlock(&state->seqlock);
390 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
392 open_flags &= (FMODE_READ|FMODE_WRITE);
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 void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
412 struct nfs_delegation *delegation;
415 delegation = rcu_dereference(NFS_I(inode)->delegation);
416 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
421 nfs_inode_return_delegation(inode);
424 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
426 struct nfs4_state *state = opendata->state;
427 struct nfs_inode *nfsi = NFS_I(state->inode);
428 struct nfs_delegation *delegation;
429 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
430 nfs4_stateid stateid;
434 delegation = rcu_dereference(nfsi->delegation);
436 if (can_open_cached(state, open_mode)) {
437 spin_lock(&state->owner->so_lock);
438 if (can_open_cached(state, open_mode)) {
439 update_open_stateflags(state, open_mode);
440 spin_unlock(&state->owner->so_lock);
442 goto out_return_state;
444 spin_unlock(&state->owner->so_lock);
446 if (delegation == NULL)
448 if (!can_open_delegated(delegation, open_mode))
450 /* Save the delegation */
451 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
454 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
460 delegation = rcu_dereference(nfsi->delegation);
461 /* If no delegation, try a cached open */
462 if (delegation == NULL)
464 /* Is the delegation still valid? */
465 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
468 update_open_stateid(state, NULL, &stateid, open_mode);
469 goto out_return_state;
475 atomic_inc(&state->count);
479 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
482 struct nfs4_state *state = NULL;
483 struct nfs_delegation *delegation;
484 nfs4_stateid *deleg_stateid = NULL;
487 if (!data->rpc_done) {
488 state = nfs4_try_open_cached(data);
493 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
495 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
496 ret = PTR_ERR(inode);
500 state = nfs4_get_open_state(inode, data->owner);
503 if (data->o_res.delegation_type != 0) {
504 int delegation_flags = 0;
507 delegation = rcu_dereference(NFS_I(inode)->delegation);
509 delegation_flags = delegation->flags;
511 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
512 nfs_inode_set_delegation(state->inode,
513 data->owner->so_cred,
516 nfs_inode_reclaim_delegation(state->inode,
517 data->owner->so_cred,
521 delegation = rcu_dereference(NFS_I(inode)->delegation);
522 if (delegation != NULL)
523 deleg_stateid = &delegation->stateid;
524 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
535 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
537 struct nfs_inode *nfsi = NFS_I(state->inode);
538 struct nfs_open_context *ctx;
540 spin_lock(&state->inode->i_lock);
541 list_for_each_entry(ctx, &nfsi->open_files, list) {
542 if (ctx->state != state)
544 get_nfs_open_context(ctx);
545 spin_unlock(&state->inode->i_lock);
548 spin_unlock(&state->inode->i_lock);
549 return ERR_PTR(-ENOENT);
552 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
554 struct nfs4_opendata *opendata;
556 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
557 if (opendata == NULL)
558 return ERR_PTR(-ENOMEM);
559 opendata->state = state;
560 atomic_inc(&state->count);
564 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
566 struct nfs4_state *newstate;
569 opendata->o_arg.open_flags = openflags;
570 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
571 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
572 nfs4_init_opendata_res(opendata);
573 ret = _nfs4_proc_open(opendata);
576 newstate = nfs4_opendata_to_nfs4_state(opendata);
577 if (IS_ERR(newstate))
578 return PTR_ERR(newstate);
579 nfs4_close_state(&opendata->path, newstate, openflags);
584 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
586 struct nfs4_state *newstate;
589 /* memory barrier prior to reading state->n_* */
590 clear_bit(NFS_DELEGATED_STATE, &state->flags);
592 if (state->n_rdwr != 0) {
593 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
596 if (newstate != state)
599 if (state->n_wronly != 0) {
600 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
603 if (newstate != state)
606 if (state->n_rdonly != 0) {
607 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
610 if (newstate != state)
614 * We may have performed cached opens for all three recoveries.
615 * Check if we need to update the current stateid.
617 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
618 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
619 write_seqlock(&state->seqlock);
620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
621 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
622 write_sequnlock(&state->seqlock);
629 * reclaim state on the server after a reboot.
631 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
633 struct nfs_delegation *delegation;
634 struct nfs4_opendata *opendata;
635 int delegation_type = 0;
638 opendata = nfs4_open_recoverdata_alloc(ctx, state);
639 if (IS_ERR(opendata))
640 return PTR_ERR(opendata);
641 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
642 opendata->o_arg.fh = NFS_FH(state->inode);
644 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
645 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
646 delegation_type = delegation->type;
648 opendata->o_arg.u.delegation_type = delegation_type;
649 status = nfs4_open_recover(opendata, state);
650 nfs4_opendata_put(opendata);
654 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
656 struct nfs_server *server = NFS_SERVER(state->inode);
657 struct nfs4_exception exception = { };
660 err = _nfs4_do_open_reclaim(ctx, state);
661 if (err != -NFS4ERR_DELAY)
663 nfs4_handle_exception(server, err, &exception);
664 } while (exception.retry);
668 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
670 struct nfs_open_context *ctx;
673 ctx = nfs4_state_find_open_context(state);
676 ret = nfs4_do_open_reclaim(ctx, state);
677 put_nfs_open_context(ctx);
681 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
683 struct nfs4_opendata *opendata;
686 opendata = nfs4_open_recoverdata_alloc(ctx, state);
687 if (IS_ERR(opendata))
688 return PTR_ERR(opendata);
689 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
690 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
691 sizeof(opendata->o_arg.u.delegation.data));
692 ret = nfs4_open_recover(opendata, state);
693 nfs4_opendata_put(opendata);
697 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
699 struct nfs4_exception exception = { };
700 struct nfs_server *server = NFS_SERVER(state->inode);
703 err = _nfs4_open_delegation_recall(ctx, state, stateid);
707 case -NFS4ERR_STALE_CLIENTID:
708 case -NFS4ERR_STALE_STATEID:
709 case -NFS4ERR_EXPIRED:
710 /* Don't recall a delegation if it was lost */
711 nfs4_schedule_state_recovery(server->nfs_client);
714 err = nfs4_handle_exception(server, err, &exception);
715 } while (exception.retry);
719 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
721 struct nfs4_opendata *data = calldata;
723 data->rpc_status = task->tk_status;
724 if (RPC_ASSASSINATED(task))
726 if (data->rpc_status == 0) {
727 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
728 sizeof(data->o_res.stateid.data));
729 nfs_confirm_seqid(&data->owner->so_seqid, 0);
730 renew_lease(data->o_res.server, data->timestamp);
733 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
736 static void nfs4_open_confirm_release(void *calldata)
738 struct nfs4_opendata *data = calldata;
739 struct nfs4_state *state = NULL;
741 /* If this request hasn't been cancelled, do nothing */
742 if (data->cancelled == 0)
744 /* In case of error, no cleanup! */
747 state = nfs4_opendata_to_nfs4_state(data);
749 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
751 nfs4_opendata_put(data);
754 static const struct rpc_call_ops nfs4_open_confirm_ops = {
755 .rpc_call_done = nfs4_open_confirm_done,
756 .rpc_release = nfs4_open_confirm_release,
760 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
762 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
764 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
765 struct rpc_task *task;
766 struct rpc_message msg = {
767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
768 .rpc_argp = &data->c_arg,
769 .rpc_resp = &data->c_res,
770 .rpc_cred = data->owner->so_cred,
772 struct rpc_task_setup task_setup_data = {
773 .rpc_client = server->client,
775 .callback_ops = &nfs4_open_confirm_ops,
776 .callback_data = data,
777 .workqueue = nfsiod_workqueue,
778 .flags = RPC_TASK_ASYNC,
782 kref_get(&data->kref);
784 data->rpc_status = 0;
785 data->timestamp = jiffies;
786 task = rpc_run_task(&task_setup_data);
788 return PTR_ERR(task);
789 status = nfs4_wait_for_completion_rpc_task(task);
794 status = data->rpc_status;
799 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
801 struct nfs4_opendata *data = calldata;
802 struct nfs4_state_owner *sp = data->owner;
804 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
807 * Check if we still need to send an OPEN call, or if we can use
808 * a delegation instead.
810 if (data->state != NULL) {
811 struct nfs_delegation *delegation;
813 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
816 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
817 if (delegation != NULL &&
818 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
824 /* Update sequence id. */
825 data->o_arg.id = sp->so_owner_id.id;
826 data->o_arg.clientid = sp->so_client->cl_clientid;
827 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
828 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
829 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
831 data->timestamp = jiffies;
832 rpc_call_start(task);
835 task->tk_action = NULL;
839 static void nfs4_open_done(struct rpc_task *task, void *calldata)
841 struct nfs4_opendata *data = calldata;
843 data->rpc_status = task->tk_status;
844 if (RPC_ASSASSINATED(task))
846 if (task->tk_status == 0) {
847 switch (data->o_res.f_attr->mode & S_IFMT) {
851 data->rpc_status = -ELOOP;
854 data->rpc_status = -EISDIR;
857 data->rpc_status = -ENOTDIR;
859 renew_lease(data->o_res.server, data->timestamp);
860 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
861 nfs_confirm_seqid(&data->owner->so_seqid, 0);
863 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
867 static void nfs4_open_release(void *calldata)
869 struct nfs4_opendata *data = calldata;
870 struct nfs4_state *state = NULL;
872 /* If this request hasn't been cancelled, do nothing */
873 if (data->cancelled == 0)
875 /* In case of error, no cleanup! */
876 if (data->rpc_status != 0 || !data->rpc_done)
878 /* In case we need an open_confirm, no cleanup! */
879 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
881 state = nfs4_opendata_to_nfs4_state(data);
883 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
885 nfs4_opendata_put(data);
888 static const struct rpc_call_ops nfs4_open_ops = {
889 .rpc_call_prepare = nfs4_open_prepare,
890 .rpc_call_done = nfs4_open_done,
891 .rpc_release = nfs4_open_release,
895 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
897 static int _nfs4_proc_open(struct nfs4_opendata *data)
899 struct inode *dir = data->dir->d_inode;
900 struct nfs_server *server = NFS_SERVER(dir);
901 struct nfs_openargs *o_arg = &data->o_arg;
902 struct nfs_openres *o_res = &data->o_res;
903 struct rpc_task *task;
904 struct rpc_message msg = {
905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
908 .rpc_cred = data->owner->so_cred,
910 struct rpc_task_setup task_setup_data = {
911 .rpc_client = server->client,
913 .callback_ops = &nfs4_open_ops,
914 .callback_data = data,
915 .workqueue = nfsiod_workqueue,
916 .flags = RPC_TASK_ASYNC,
920 kref_get(&data->kref);
922 data->rpc_status = 0;
924 task = rpc_run_task(&task_setup_data);
926 return PTR_ERR(task);
927 status = nfs4_wait_for_completion_rpc_task(task);
932 status = data->rpc_status;
934 if (status != 0 || !data->rpc_done)
937 if (o_res->fh.size == 0)
938 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
940 if (o_arg->open_flags & O_CREAT) {
941 update_changeattr(dir, &o_res->cinfo);
942 nfs_post_op_update_inode(dir, o_res->dir_attr);
944 nfs_refresh_inode(dir, o_res->dir_attr);
945 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
946 status = _nfs4_proc_open_confirm(data);
950 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
951 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
955 static int nfs4_recover_expired_lease(struct nfs_server *server)
957 struct nfs_client *clp = server->nfs_client;
961 ret = nfs4_wait_clnt_recover(server->client, clp);
964 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
966 nfs4_schedule_state_recovery(clp);
973 * reclaim state on the server after a network partition.
974 * Assumes caller holds the appropriate lock
976 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
978 struct nfs4_opendata *opendata;
981 opendata = nfs4_open_recoverdata_alloc(ctx, state);
982 if (IS_ERR(opendata))
983 return PTR_ERR(opendata);
984 ret = nfs4_open_recover(opendata, state);
985 if (ret == -ESTALE) {
986 /* Invalidate the state owner so we don't ever use it again */
987 nfs4_drop_state_owner(state->owner);
988 d_drop(ctx->path.dentry);
990 nfs4_opendata_put(opendata);
994 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
996 struct nfs_server *server = NFS_SERVER(state->inode);
997 struct nfs4_exception exception = { };
1001 err = _nfs4_open_expired(ctx, state);
1002 if (err == -NFS4ERR_DELAY)
1003 nfs4_handle_exception(server, err, &exception);
1004 } while (exception.retry);
1008 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1010 struct nfs_open_context *ctx;
1013 ctx = nfs4_state_find_open_context(state);
1015 return PTR_ERR(ctx);
1016 ret = nfs4_do_open_expired(ctx, state);
1017 put_nfs_open_context(ctx);
1022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1023 * fields corresponding to attributes that were used to store the verifier.
1024 * Make sure we clobber those fields in the later setattr call
1026 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1029 !(sattr->ia_valid & ATTR_ATIME_SET))
1030 sattr->ia_valid |= ATTR_ATIME;
1032 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1033 !(sattr->ia_valid & ATTR_MTIME_SET))
1034 sattr->ia_valid |= ATTR_MTIME;
1038 * Returns a referenced nfs4_state
1040 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1042 struct nfs4_state_owner *sp;
1043 struct nfs4_state *state = NULL;
1044 struct nfs_server *server = NFS_SERVER(dir);
1045 struct nfs_client *clp = server->nfs_client;
1046 struct nfs4_opendata *opendata;
1049 /* Protect against reboot recovery conflicts */
1051 if (!(sp = nfs4_get_state_owner(server, cred))) {
1052 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1055 status = nfs4_recover_expired_lease(server);
1057 goto err_put_state_owner;
1058 if (path->dentry->d_inode != NULL)
1059 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1060 down_read(&clp->cl_sem);
1062 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1063 if (opendata == NULL)
1064 goto err_release_rwsem;
1066 if (path->dentry->d_inode != NULL)
1067 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1069 status = _nfs4_proc_open(opendata);
1071 goto err_opendata_put;
1073 if (opendata->o_arg.open_flags & O_EXCL)
1074 nfs4_exclusive_attrset(opendata, sattr);
1076 state = nfs4_opendata_to_nfs4_state(opendata);
1077 status = PTR_ERR(state);
1079 goto err_opendata_put;
1080 nfs4_opendata_put(opendata);
1081 nfs4_put_state_owner(sp);
1082 up_read(&clp->cl_sem);
1086 nfs4_opendata_put(opendata);
1088 up_read(&clp->cl_sem);
1089 err_put_state_owner:
1090 nfs4_put_state_owner(sp);
1097 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1099 struct nfs4_exception exception = { };
1100 struct nfs4_state *res;
1104 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1107 /* NOTE: BAD_SEQID means the server and client disagree about the
1108 * book-keeping w.r.t. state-changing operations
1109 * (OPEN/CLOSE/LOCK/LOCKU...)
1110 * It is actually a sign of a bug on the client or on the server.
1112 * If we receive a BAD_SEQID error in the particular case of
1113 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1114 * have unhashed the old state_owner for us, and that we can
1115 * therefore safely retry using a new one. We should still warn
1116 * the user though...
1118 if (status == -NFS4ERR_BAD_SEQID) {
1119 printk(KERN_WARNING "NFS: v4 server %s "
1120 " returned a bad sequence-id error!\n",
1121 NFS_SERVER(dir)->nfs_client->cl_hostname);
1122 exception.retry = 1;
1126 * BAD_STATEID on OPEN means that the server cancelled our
1127 * state before it received the OPEN_CONFIRM.
1128 * Recover by retrying the request as per the discussion
1129 * on Page 181 of RFC3530.
1131 if (status == -NFS4ERR_BAD_STATEID) {
1132 exception.retry = 1;
1135 if (status == -EAGAIN) {
1136 /* We must have found a delegation */
1137 exception.retry = 1;
1140 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1141 status, &exception));
1142 } while (exception.retry);
1146 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1147 struct iattr *sattr, struct nfs4_state *state)
1149 struct nfs_server *server = NFS_SERVER(inode);
1150 struct nfs_setattrargs arg = {
1151 .fh = NFS_FH(inode),
1154 .bitmask = server->attr_bitmask,
1156 struct nfs_setattrres res = {
1160 struct rpc_message msg = {
1161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1165 unsigned long timestamp = jiffies;
1168 nfs_fattr_init(fattr);
1170 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1171 /* Use that stateid */
1172 } else if (state != NULL) {
1173 msg.rpc_cred = state->owner->so_cred;
1174 nfs4_copy_stateid(&arg.stateid, state, current->files);
1176 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1178 status = rpc_call_sync(server->client, &msg, 0);
1179 if (status == 0 && state != NULL)
1180 renew_lease(server, timestamp);
1184 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1185 struct iattr *sattr, struct nfs4_state *state)
1187 struct nfs_server *server = NFS_SERVER(inode);
1188 struct nfs4_exception exception = { };
1191 err = nfs4_handle_exception(server,
1192 _nfs4_do_setattr(inode, fattr, sattr, state),
1194 } while (exception.retry);
1198 struct nfs4_closedata {
1200 struct inode *inode;
1201 struct nfs4_state *state;
1202 struct nfs_closeargs arg;
1203 struct nfs_closeres res;
1204 struct nfs_fattr fattr;
1205 unsigned long timestamp;
1208 static void nfs4_free_closedata(void *data)
1210 struct nfs4_closedata *calldata = data;
1211 struct nfs4_state_owner *sp = calldata->state->owner;
1213 nfs4_put_open_state(calldata->state);
1214 nfs_free_seqid(calldata->arg.seqid);
1215 nfs4_put_state_owner(sp);
1216 dput(calldata->path.dentry);
1217 mntput(calldata->path.mnt);
1221 static void nfs4_close_done(struct rpc_task *task, void *data)
1223 struct nfs4_closedata *calldata = data;
1224 struct nfs4_state *state = calldata->state;
1225 struct nfs_server *server = NFS_SERVER(calldata->inode);
1227 if (RPC_ASSASSINATED(task))
1229 /* hmm. we are done with the inode, and in the process of freeing
1230 * the state_owner. we keep this around to process errors
1232 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1233 switch (task->tk_status) {
1235 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1236 renew_lease(server, calldata->timestamp);
1238 case -NFS4ERR_STALE_STATEID:
1239 case -NFS4ERR_EXPIRED:
1242 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1243 rpc_restart_call(task);
1247 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1250 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1252 struct nfs4_closedata *calldata = data;
1253 struct nfs4_state *state = calldata->state;
1254 int clear_rd, clear_wr, clear_rdwr;
1256 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1259 clear_rd = clear_wr = clear_rdwr = 0;
1260 spin_lock(&state->owner->so_lock);
1261 /* Calculate the change in open mode */
1262 if (state->n_rdwr == 0) {
1263 if (state->n_rdonly == 0) {
1264 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1267 if (state->n_wronly == 0) {
1268 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1269 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1272 spin_unlock(&state->owner->so_lock);
1273 if (!clear_rd && !clear_wr && !clear_rdwr) {
1274 /* Note: exit _without_ calling nfs4_close_done */
1275 task->tk_action = NULL;
1278 nfs_fattr_init(calldata->res.fattr);
1279 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1281 calldata->arg.open_flags = FMODE_READ;
1282 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1283 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1284 calldata->arg.open_flags = FMODE_WRITE;
1286 calldata->timestamp = jiffies;
1287 rpc_call_start(task);
1290 static const struct rpc_call_ops nfs4_close_ops = {
1291 .rpc_call_prepare = nfs4_close_prepare,
1292 .rpc_call_done = nfs4_close_done,
1293 .rpc_release = nfs4_free_closedata,
1297 * It is possible for data to be read/written from a mem-mapped file
1298 * after the sys_close call (which hits the vfs layer as a flush).
1299 * This means that we can't safely call nfsv4 close on a file until
1300 * the inode is cleared. This in turn means that we are not good
1301 * NFSv4 citizens - we do not indicate to the server to update the file's
1302 * share state even when we are done with one of the three share
1303 * stateid's in the inode.
1305 * NOTE: Caller must be holding the sp->so_owner semaphore!
1307 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1309 struct nfs_server *server = NFS_SERVER(state->inode);
1310 struct nfs4_closedata *calldata;
1311 struct nfs4_state_owner *sp = state->owner;
1312 struct rpc_task *task;
1313 struct rpc_message msg = {
1314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1315 .rpc_cred = state->owner->so_cred,
1317 struct rpc_task_setup task_setup_data = {
1318 .rpc_client = server->client,
1319 .rpc_message = &msg,
1320 .callback_ops = &nfs4_close_ops,
1321 .workqueue = nfsiod_workqueue,
1322 .flags = RPC_TASK_ASYNC,
1324 int status = -ENOMEM;
1326 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1327 if (calldata == NULL)
1329 calldata->inode = state->inode;
1330 calldata->state = state;
1331 calldata->arg.fh = NFS_FH(state->inode);
1332 calldata->arg.stateid = &state->open_stateid;
1333 /* Serialization for the sequence id */
1334 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1335 if (calldata->arg.seqid == NULL)
1336 goto out_free_calldata;
1337 calldata->arg.bitmask = server->attr_bitmask;
1338 calldata->res.fattr = &calldata->fattr;
1339 calldata->res.server = server;
1340 calldata->path.mnt = mntget(path->mnt);
1341 calldata->path.dentry = dget(path->dentry);
1343 msg.rpc_argp = &calldata->arg,
1344 msg.rpc_resp = &calldata->res,
1345 task_setup_data.callback_data = calldata;
1346 task = rpc_run_task(&task_setup_data);
1348 return PTR_ERR(task);
1351 status = rpc_wait_for_completion_task(task);
1357 nfs4_put_open_state(state);
1358 nfs4_put_state_owner(sp);
1362 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1367 /* If the open_intent is for execute, we have an extra check to make */
1368 if (nd->intent.open.flags & FMODE_EXEC) {
1369 ret = nfs_may_open(state->inode,
1370 state->owner->so_cred,
1371 nd->intent.open.flags);
1375 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1376 if (!IS_ERR(filp)) {
1377 struct nfs_open_context *ctx;
1378 ctx = nfs_file_open_context(filp);
1382 ret = PTR_ERR(filp);
1384 nfs4_close_sync(path, state, nd->intent.open.flags);
1389 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1391 struct path path = {
1392 .mnt = nd->path.mnt,
1395 struct dentry *parent;
1397 struct rpc_cred *cred;
1398 struct nfs4_state *state;
1401 if (nd->flags & LOOKUP_CREATE) {
1402 attr.ia_mode = nd->intent.open.create_mode;
1403 attr.ia_valid = ATTR_MODE;
1404 if (!IS_POSIXACL(dir))
1405 attr.ia_mode &= ~current->fs->umask;
1408 BUG_ON(nd->intent.open.flags & O_CREAT);
1411 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1413 return (struct dentry *)cred;
1414 parent = dentry->d_parent;
1415 /* Protect against concurrent sillydeletes */
1416 nfs_block_sillyrename(parent);
1417 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1419 if (IS_ERR(state)) {
1420 if (PTR_ERR(state) == -ENOENT) {
1421 d_add(dentry, NULL);
1422 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1424 nfs_unblock_sillyrename(parent);
1425 return (struct dentry *)state;
1427 res = d_add_unique(dentry, igrab(state->inode));
1430 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1431 nfs_unblock_sillyrename(parent);
1432 nfs4_intent_set_file(nd, &path, state);
1437 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1439 struct path path = {
1440 .mnt = nd->path.mnt,
1443 struct rpc_cred *cred;
1444 struct nfs4_state *state;
1446 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1448 return PTR_ERR(cred);
1449 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1451 if (IS_ERR(state)) {
1452 switch (PTR_ERR(state)) {
1458 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1464 if (state->inode == dentry->d_inode) {
1465 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1466 nfs4_intent_set_file(nd, &path, state);
1469 nfs4_close_sync(&path, state, openflags);
1476 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1478 struct nfs4_server_caps_res res = {};
1479 struct rpc_message msg = {
1480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1481 .rpc_argp = fhandle,
1486 status = rpc_call_sync(server->client, &msg, 0);
1488 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1489 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1490 server->caps |= NFS_CAP_ACLS;
1491 if (res.has_links != 0)
1492 server->caps |= NFS_CAP_HARDLINKS;
1493 if (res.has_symlinks != 0)
1494 server->caps |= NFS_CAP_SYMLINKS;
1495 server->acl_bitmask = res.acl_bitmask;
1500 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1502 struct nfs4_exception exception = { };
1505 err = nfs4_handle_exception(server,
1506 _nfs4_server_capabilities(server, fhandle),
1508 } while (exception.retry);
1512 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1513 struct nfs_fsinfo *info)
1515 struct nfs4_lookup_root_arg args = {
1516 .bitmask = nfs4_fattr_bitmap,
1518 struct nfs4_lookup_res res = {
1520 .fattr = info->fattr,
1523 struct rpc_message msg = {
1524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1528 nfs_fattr_init(info->fattr);
1529 return rpc_call_sync(server->client, &msg, 0);
1532 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1533 struct nfs_fsinfo *info)
1535 struct nfs4_exception exception = { };
1538 err = nfs4_handle_exception(server,
1539 _nfs4_lookup_root(server, fhandle, info),
1541 } while (exception.retry);
1546 * get the file handle for the "/" directory on the server
1548 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1549 struct nfs_fsinfo *info)
1553 status = nfs4_lookup_root(server, fhandle, info);
1555 status = nfs4_server_capabilities(server, fhandle);
1557 status = nfs4_do_fsinfo(server, fhandle, info);
1558 return nfs4_map_errors(status);
1562 * Get locations and (maybe) other attributes of a referral.
1563 * Note that we'll actually follow the referral later when
1564 * we detect fsid mismatch in inode revalidation
1566 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1568 int status = -ENOMEM;
1569 struct page *page = NULL;
1570 struct nfs4_fs_locations *locations = NULL;
1572 page = alloc_page(GFP_KERNEL);
1575 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1576 if (locations == NULL)
1579 status = nfs4_proc_fs_locations(dir, name, locations, page);
1582 /* Make sure server returned a different fsid for the referral */
1583 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1584 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1589 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1590 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1592 fattr->mode = S_IFDIR;
1593 memset(fhandle, 0, sizeof(struct nfs_fh));
1602 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1604 struct nfs4_getattr_arg args = {
1606 .bitmask = server->attr_bitmask,
1608 struct nfs4_getattr_res res = {
1612 struct rpc_message msg = {
1613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1618 nfs_fattr_init(fattr);
1619 return rpc_call_sync(server->client, &msg, 0);
1622 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1624 struct nfs4_exception exception = { };
1627 err = nfs4_handle_exception(server,
1628 _nfs4_proc_getattr(server, fhandle, fattr),
1630 } while (exception.retry);
1635 * The file is not closed if it is opened due to the a request to change
1636 * the size of the file. The open call will not be needed once the
1637 * VFS layer lookup-intents are implemented.
1639 * Close is called when the inode is destroyed.
1640 * If we haven't opened the file for O_WRONLY, we
1641 * need to in the size_change case to obtain a stateid.
1644 * Because OPEN is always done by name in nfsv4, it is
1645 * possible that we opened a different file by the same
1646 * name. We can recognize this race condition, but we
1647 * can't do anything about it besides returning an error.
1649 * This will be fixed with VFS changes (lookup-intent).
1652 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1653 struct iattr *sattr)
1655 struct rpc_cred *cred;
1656 struct inode *inode = dentry->d_inode;
1657 struct nfs_open_context *ctx;
1658 struct nfs4_state *state = NULL;
1661 nfs_fattr_init(fattr);
1663 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1665 return PTR_ERR(cred);
1667 /* Search for an existing open(O_WRITE) file */
1668 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1672 status = nfs4_do_setattr(inode, fattr, sattr, state);
1674 nfs_setattr_update_inode(inode, sattr);
1676 put_nfs_open_context(ctx);
1681 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1682 const struct qstr *name, struct nfs_fh *fhandle,
1683 struct nfs_fattr *fattr)
1686 struct nfs4_lookup_arg args = {
1687 .bitmask = server->attr_bitmask,
1691 struct nfs4_lookup_res res = {
1696 struct rpc_message msg = {
1697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1702 nfs_fattr_init(fattr);
1704 dprintk("NFS call lookupfh %s\n", name->name);
1705 status = rpc_call_sync(server->client, &msg, 0);
1706 dprintk("NFS reply lookupfh: %d\n", status);
1710 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1711 struct qstr *name, struct nfs_fh *fhandle,
1712 struct nfs_fattr *fattr)
1714 struct nfs4_exception exception = { };
1717 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1719 if (err == -NFS4ERR_MOVED) {
1723 err = nfs4_handle_exception(server, err, &exception);
1724 } while (exception.retry);
1728 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1729 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1733 dprintk("NFS call lookup %s\n", name->name);
1734 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1735 if (status == -NFS4ERR_MOVED)
1736 status = nfs4_get_referral(dir, name, fattr, fhandle);
1737 dprintk("NFS reply lookup: %d\n", status);
1741 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1743 struct nfs4_exception exception = { };
1746 err = nfs4_handle_exception(NFS_SERVER(dir),
1747 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1749 } while (exception.retry);
1753 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1755 struct nfs_server *server = NFS_SERVER(inode);
1756 struct nfs_fattr fattr;
1757 struct nfs4_accessargs args = {
1758 .fh = NFS_FH(inode),
1759 .bitmask = server->attr_bitmask,
1761 struct nfs4_accessres res = {
1765 struct rpc_message msg = {
1766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1769 .rpc_cred = entry->cred,
1771 int mode = entry->mask;
1775 * Determine which access bits we want to ask for...
1777 if (mode & MAY_READ)
1778 args.access |= NFS4_ACCESS_READ;
1779 if (S_ISDIR(inode->i_mode)) {
1780 if (mode & MAY_WRITE)
1781 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1782 if (mode & MAY_EXEC)
1783 args.access |= NFS4_ACCESS_LOOKUP;
1785 if (mode & MAY_WRITE)
1786 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1787 if (mode & MAY_EXEC)
1788 args.access |= NFS4_ACCESS_EXECUTE;
1790 nfs_fattr_init(&fattr);
1791 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1794 if (res.access & NFS4_ACCESS_READ)
1795 entry->mask |= MAY_READ;
1796 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1797 entry->mask |= MAY_WRITE;
1798 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1799 entry->mask |= MAY_EXEC;
1800 nfs_refresh_inode(inode, &fattr);
1805 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1807 struct nfs4_exception exception = { };
1810 err = nfs4_handle_exception(NFS_SERVER(inode),
1811 _nfs4_proc_access(inode, entry),
1813 } while (exception.retry);
1818 * TODO: For the time being, we don't try to get any attributes
1819 * along with any of the zero-copy operations READ, READDIR,
1822 * In the case of the first three, we want to put the GETATTR
1823 * after the read-type operation -- this is because it is hard
1824 * to predict the length of a GETATTR response in v4, and thus
1825 * align the READ data correctly. This means that the GETATTR
1826 * may end up partially falling into the page cache, and we should
1827 * shift it into the 'tail' of the xdr_buf before processing.
1828 * To do this efficiently, we need to know the total length
1829 * of data received, which doesn't seem to be available outside
1832 * In the case of WRITE, we also want to put the GETATTR after
1833 * the operation -- in this case because we want to make sure
1834 * we get the post-operation mtime and size. This means that
1835 * we can't use xdr_encode_pages() as written: we need a variant
1836 * of it which would leave room in the 'tail' iovec.
1838 * Both of these changes to the XDR layer would in fact be quite
1839 * minor, but I decided to leave them for a subsequent patch.
1841 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1842 unsigned int pgbase, unsigned int pglen)
1844 struct nfs4_readlink args = {
1845 .fh = NFS_FH(inode),
1850 struct rpc_message msg = {
1851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1856 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1859 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1860 unsigned int pgbase, unsigned int pglen)
1862 struct nfs4_exception exception = { };
1865 err = nfs4_handle_exception(NFS_SERVER(inode),
1866 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1868 } while (exception.retry);
1874 * We will need to arrange for the VFS layer to provide an atomic open.
1875 * Until then, this create/open method is prone to inefficiency and race
1876 * conditions due to the lookup, create, and open VFS calls from sys_open()
1877 * placed on the wire.
1879 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1880 * The file will be opened again in the subsequent VFS open call
1881 * (nfs4_proc_file_open).
1883 * The open for read will just hang around to be used by any process that
1884 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1888 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1889 int flags, struct nameidata *nd)
1891 struct path path = {
1892 .mnt = nd->path.mnt,
1895 struct nfs4_state *state;
1896 struct rpc_cred *cred;
1899 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1901 status = PTR_ERR(cred);
1904 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1907 if (IS_ERR(state)) {
1908 status = PTR_ERR(state);
1911 d_add(dentry, igrab(state->inode));
1912 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1913 if (flags & O_EXCL) {
1914 struct nfs_fattr fattr;
1915 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1917 nfs_setattr_update_inode(state->inode, sattr);
1918 nfs_post_op_update_inode(state->inode, &fattr);
1920 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1921 status = nfs4_intent_set_file(nd, &path, state);
1923 nfs4_close_sync(&path, state, flags);
1928 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1930 struct nfs_server *server = NFS_SERVER(dir);
1931 struct nfs_removeargs args = {
1933 .name.len = name->len,
1934 .name.name = name->name,
1935 .bitmask = server->attr_bitmask,
1937 struct nfs_removeres res = {
1940 struct rpc_message msg = {
1941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1947 nfs_fattr_init(&res.dir_attr);
1948 status = rpc_call_sync(server->client, &msg, 0);
1950 update_changeattr(dir, &res.cinfo);
1951 nfs_post_op_update_inode(dir, &res.dir_attr);
1956 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1958 struct nfs4_exception exception = { };
1961 err = nfs4_handle_exception(NFS_SERVER(dir),
1962 _nfs4_proc_remove(dir, name),
1964 } while (exception.retry);
1968 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1970 struct nfs_server *server = NFS_SERVER(dir);
1971 struct nfs_removeargs *args = msg->rpc_argp;
1972 struct nfs_removeres *res = msg->rpc_resp;
1974 args->bitmask = server->attr_bitmask;
1975 res->server = server;
1976 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1979 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1981 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1983 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1985 update_changeattr(dir, &res->cinfo);
1986 nfs_post_op_update_inode(dir, &res->dir_attr);
1990 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1991 struct inode *new_dir, struct qstr *new_name)
1993 struct nfs_server *server = NFS_SERVER(old_dir);
1994 struct nfs4_rename_arg arg = {
1995 .old_dir = NFS_FH(old_dir),
1996 .new_dir = NFS_FH(new_dir),
1997 .old_name = old_name,
1998 .new_name = new_name,
1999 .bitmask = server->attr_bitmask,
2001 struct nfs_fattr old_fattr, new_fattr;
2002 struct nfs4_rename_res res = {
2004 .old_fattr = &old_fattr,
2005 .new_fattr = &new_fattr,
2007 struct rpc_message msg = {
2008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2014 nfs_fattr_init(res.old_fattr);
2015 nfs_fattr_init(res.new_fattr);
2016 status = rpc_call_sync(server->client, &msg, 0);
2019 update_changeattr(old_dir, &res.old_cinfo);
2020 nfs_post_op_update_inode(old_dir, res.old_fattr);
2021 update_changeattr(new_dir, &res.new_cinfo);
2022 nfs_post_op_update_inode(new_dir, res.new_fattr);
2027 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2028 struct inode *new_dir, struct qstr *new_name)
2030 struct nfs4_exception exception = { };
2033 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2034 _nfs4_proc_rename(old_dir, old_name,
2037 } while (exception.retry);
2041 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2043 struct nfs_server *server = NFS_SERVER(inode);
2044 struct nfs4_link_arg arg = {
2045 .fh = NFS_FH(inode),
2046 .dir_fh = NFS_FH(dir),
2048 .bitmask = server->attr_bitmask,
2050 struct nfs_fattr fattr, dir_attr;
2051 struct nfs4_link_res res = {
2054 .dir_attr = &dir_attr,
2056 struct rpc_message msg = {
2057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2063 nfs_fattr_init(res.fattr);
2064 nfs_fattr_init(res.dir_attr);
2065 status = rpc_call_sync(server->client, &msg, 0);
2067 update_changeattr(dir, &res.cinfo);
2068 nfs_post_op_update_inode(dir, res.dir_attr);
2069 nfs_post_op_update_inode(inode, res.fattr);
2075 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2077 struct nfs4_exception exception = { };
2080 err = nfs4_handle_exception(NFS_SERVER(inode),
2081 _nfs4_proc_link(inode, dir, name),
2083 } while (exception.retry);
2087 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2088 struct page *page, unsigned int len, struct iattr *sattr)
2090 struct nfs_server *server = NFS_SERVER(dir);
2091 struct nfs_fh fhandle;
2092 struct nfs_fattr fattr, dir_fattr;
2093 struct nfs4_create_arg arg = {
2094 .dir_fh = NFS_FH(dir),
2096 .name = &dentry->d_name,
2099 .bitmask = server->attr_bitmask,
2101 struct nfs4_create_res res = {
2105 .dir_fattr = &dir_fattr,
2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2114 if (len > NFS4_MAXPATHLEN)
2115 return -ENAMETOOLONG;
2117 arg.u.symlink.pages = &page;
2118 arg.u.symlink.len = len;
2119 nfs_fattr_init(&fattr);
2120 nfs_fattr_init(&dir_fattr);
2122 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2124 update_changeattr(dir, &res.dir_cinfo);
2125 nfs_post_op_update_inode(dir, res.dir_fattr);
2126 status = nfs_instantiate(dentry, &fhandle, &fattr);
2131 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2132 struct page *page, unsigned int len, struct iattr *sattr)
2134 struct nfs4_exception exception = { };
2137 err = nfs4_handle_exception(NFS_SERVER(dir),
2138 _nfs4_proc_symlink(dir, dentry, page,
2141 } while (exception.retry);
2145 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2146 struct iattr *sattr)
2148 struct nfs_server *server = NFS_SERVER(dir);
2149 struct nfs_fh fhandle;
2150 struct nfs_fattr fattr, dir_fattr;
2151 struct nfs4_create_arg arg = {
2152 .dir_fh = NFS_FH(dir),
2154 .name = &dentry->d_name,
2157 .bitmask = server->attr_bitmask,
2159 struct nfs4_create_res res = {
2163 .dir_fattr = &dir_fattr,
2165 struct rpc_message msg = {
2166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2172 nfs_fattr_init(&fattr);
2173 nfs_fattr_init(&dir_fattr);
2175 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2177 update_changeattr(dir, &res.dir_cinfo);
2178 nfs_post_op_update_inode(dir, res.dir_fattr);
2179 status = nfs_instantiate(dentry, &fhandle, &fattr);
2184 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2185 struct iattr *sattr)
2187 struct nfs4_exception exception = { };
2190 err = nfs4_handle_exception(NFS_SERVER(dir),
2191 _nfs4_proc_mkdir(dir, dentry, sattr),
2193 } while (exception.retry);
2197 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2198 u64 cookie, struct page *page, unsigned int count, int plus)
2200 struct inode *dir = dentry->d_inode;
2201 struct nfs4_readdir_arg args = {
2206 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2208 struct nfs4_readdir_res res;
2209 struct rpc_message msg = {
2210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2217 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2218 dentry->d_parent->d_name.name,
2219 dentry->d_name.name,
2220 (unsigned long long)cookie);
2221 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2222 res.pgbase = args.pgbase;
2223 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2225 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2227 nfs_invalidate_atime(dir);
2229 dprintk("%s: returns %d\n", __FUNCTION__, status);
2233 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2234 u64 cookie, struct page *page, unsigned int count, int plus)
2236 struct nfs4_exception exception = { };
2239 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2240 _nfs4_proc_readdir(dentry, cred, cookie,
2243 } while (exception.retry);
2247 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2248 struct iattr *sattr, dev_t rdev)
2250 struct nfs_server *server = NFS_SERVER(dir);
2252 struct nfs_fattr fattr, dir_fattr;
2253 struct nfs4_create_arg arg = {
2254 .dir_fh = NFS_FH(dir),
2256 .name = &dentry->d_name,
2258 .bitmask = server->attr_bitmask,
2260 struct nfs4_create_res res = {
2264 .dir_fattr = &dir_fattr,
2266 struct rpc_message msg = {
2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2272 int mode = sattr->ia_mode;
2274 nfs_fattr_init(&fattr);
2275 nfs_fattr_init(&dir_fattr);
2277 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2278 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2280 arg.ftype = NF4FIFO;
2281 else if (S_ISBLK(mode)) {
2283 arg.u.device.specdata1 = MAJOR(rdev);
2284 arg.u.device.specdata2 = MINOR(rdev);
2286 else if (S_ISCHR(mode)) {
2288 arg.u.device.specdata1 = MAJOR(rdev);
2289 arg.u.device.specdata2 = MINOR(rdev);
2292 arg.ftype = NF4SOCK;
2294 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2296 update_changeattr(dir, &res.dir_cinfo);
2297 nfs_post_op_update_inode(dir, res.dir_fattr);
2298 status = nfs_instantiate(dentry, &fh, &fattr);
2303 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2304 struct iattr *sattr, dev_t rdev)
2306 struct nfs4_exception exception = { };
2309 err = nfs4_handle_exception(NFS_SERVER(dir),
2310 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2312 } while (exception.retry);
2316 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2317 struct nfs_fsstat *fsstat)
2319 struct nfs4_statfs_arg args = {
2321 .bitmask = server->attr_bitmask,
2323 struct rpc_message msg = {
2324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2329 nfs_fattr_init(fsstat->fattr);
2330 return rpc_call_sync(server->client, &msg, 0);
2333 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2335 struct nfs4_exception exception = { };
2338 err = nfs4_handle_exception(server,
2339 _nfs4_proc_statfs(server, fhandle, fsstat),
2341 } while (exception.retry);
2345 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2346 struct nfs_fsinfo *fsinfo)
2348 struct nfs4_fsinfo_arg args = {
2350 .bitmask = server->attr_bitmask,
2352 struct rpc_message msg = {
2353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2358 return rpc_call_sync(server->client, &msg, 0);
2361 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2363 struct nfs4_exception exception = { };
2367 err = nfs4_handle_exception(server,
2368 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2370 } while (exception.retry);
2374 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2376 nfs_fattr_init(fsinfo->fattr);
2377 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2380 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_pathconf *pathconf)
2383 struct nfs4_pathconf_arg args = {
2385 .bitmask = server->attr_bitmask,
2387 struct rpc_message msg = {
2388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2390 .rpc_resp = pathconf,
2393 /* None of the pathconf attributes are mandatory to implement */
2394 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2395 memset(pathconf, 0, sizeof(*pathconf));
2399 nfs_fattr_init(pathconf->fattr);
2400 return rpc_call_sync(server->client, &msg, 0);
2403 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2404 struct nfs_pathconf *pathconf)
2406 struct nfs4_exception exception = { };
2410 err = nfs4_handle_exception(server,
2411 _nfs4_proc_pathconf(server, fhandle, pathconf),
2413 } while (exception.retry);
2417 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2419 struct nfs_server *server = NFS_SERVER(data->inode);
2421 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2422 rpc_restart_call(task);
2426 nfs_invalidate_atime(data->inode);
2427 if (task->tk_status > 0)
2428 renew_lease(server, data->timestamp);
2432 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2434 data->timestamp = jiffies;
2435 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2438 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2440 struct inode *inode = data->inode;
2442 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2443 rpc_restart_call(task);
2446 if (task->tk_status >= 0) {
2447 renew_lease(NFS_SERVER(inode), data->timestamp);
2448 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2453 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2455 struct nfs_server *server = NFS_SERVER(data->inode);
2457 data->args.bitmask = server->attr_bitmask;
2458 data->res.server = server;
2459 data->timestamp = jiffies;
2461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2464 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2466 struct inode *inode = data->inode;
2468 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2469 rpc_restart_call(task);
2472 nfs_refresh_inode(inode, data->res.fattr);
2476 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2478 struct nfs_server *server = NFS_SERVER(data->inode);
2480 data->args.bitmask = server->attr_bitmask;
2481 data->res.server = server;
2482 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2486 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2487 * standalone procedure for queueing an asynchronous RENEW.
2489 static void nfs4_renew_done(struct rpc_task *task, void *data)
2491 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2492 unsigned long timestamp = (unsigned long)data;
2494 if (task->tk_status < 0) {
2495 switch (task->tk_status) {
2496 case -NFS4ERR_STALE_CLIENTID:
2497 case -NFS4ERR_EXPIRED:
2498 case -NFS4ERR_CB_PATH_DOWN:
2499 nfs4_schedule_state_recovery(clp);
2503 spin_lock(&clp->cl_lock);
2504 if (time_before(clp->cl_last_renewal,timestamp))
2505 clp->cl_last_renewal = timestamp;
2506 spin_unlock(&clp->cl_lock);
2509 static const struct rpc_call_ops nfs4_renew_ops = {
2510 .rpc_call_done = nfs4_renew_done,
2513 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2515 struct rpc_message msg = {
2516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2521 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2522 &nfs4_renew_ops, (void *)jiffies);
2525 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2527 struct rpc_message msg = {
2528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2532 unsigned long now = jiffies;
2535 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2538 spin_lock(&clp->cl_lock);
2539 if (time_before(clp->cl_last_renewal,now))
2540 clp->cl_last_renewal = now;
2541 spin_unlock(&clp->cl_lock);
2545 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2547 return (server->caps & NFS_CAP_ACLS)
2548 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2549 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2552 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2553 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2556 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2558 static void buf_to_pages(const void *buf, size_t buflen,
2559 struct page **pages, unsigned int *pgbase)
2561 const void *p = buf;
2563 *pgbase = offset_in_page(buf);
2565 while (p < buf + buflen) {
2566 *(pages++) = virt_to_page(p);
2567 p += PAGE_CACHE_SIZE;
2571 struct nfs4_cached_acl {
2577 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2579 struct nfs_inode *nfsi = NFS_I(inode);
2581 spin_lock(&inode->i_lock);
2582 kfree(nfsi->nfs4_acl);
2583 nfsi->nfs4_acl = acl;
2584 spin_unlock(&inode->i_lock);
2587 static void nfs4_zap_acl_attr(struct inode *inode)
2589 nfs4_set_cached_acl(inode, NULL);
2592 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2594 struct nfs_inode *nfsi = NFS_I(inode);
2595 struct nfs4_cached_acl *acl;
2598 spin_lock(&inode->i_lock);
2599 acl = nfsi->nfs4_acl;
2602 if (buf == NULL) /* user is just asking for length */
2604 if (acl->cached == 0)
2606 ret = -ERANGE; /* see getxattr(2) man page */
2607 if (acl->len > buflen)
2609 memcpy(buf, acl->data, acl->len);
2613 spin_unlock(&inode->i_lock);
2617 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2619 struct nfs4_cached_acl *acl;
2621 if (buf && acl_len <= PAGE_SIZE) {
2622 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2626 memcpy(acl->data, buf, acl_len);
2628 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2635 nfs4_set_cached_acl(inode, acl);
2638 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2640 struct page *pages[NFS4ACL_MAXPAGES];
2641 struct nfs_getaclargs args = {
2642 .fh = NFS_FH(inode),
2646 size_t resp_len = buflen;
2648 struct rpc_message msg = {
2649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2651 .rpc_resp = &resp_len,
2653 struct page *localpage = NULL;
2656 if (buflen < PAGE_SIZE) {
2657 /* As long as we're doing a round trip to the server anyway,
2658 * let's be prepared for a page of acl data. */
2659 localpage = alloc_page(GFP_KERNEL);
2660 resp_buf = page_address(localpage);
2661 if (localpage == NULL)
2663 args.acl_pages[0] = localpage;
2664 args.acl_pgbase = 0;
2665 resp_len = args.acl_len = PAGE_SIZE;
2668 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2670 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2673 if (resp_len > args.acl_len)
2674 nfs4_write_cached_acl(inode, NULL, resp_len);
2676 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2679 if (resp_len > buflen)
2682 memcpy(buf, resp_buf, resp_len);
2687 __free_page(localpage);
2691 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2693 struct nfs4_exception exception = { };
2696 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2699 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2700 } while (exception.retry);
2704 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2706 struct nfs_server *server = NFS_SERVER(inode);
2709 if (!nfs4_server_supports_acls(server))
2711 ret = nfs_revalidate_inode(server, inode);
2714 ret = nfs4_read_cached_acl(inode, buf, buflen);
2717 return nfs4_get_acl_uncached(inode, buf, buflen);
2720 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2722 struct nfs_server *server = NFS_SERVER(inode);
2723 struct page *pages[NFS4ACL_MAXPAGES];
2724 struct nfs_setaclargs arg = {
2725 .fh = NFS_FH(inode),
2729 struct rpc_message msg = {
2730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2736 if (!nfs4_server_supports_acls(server))
2738 nfs_inode_return_delegation(inode);
2739 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2740 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2741 nfs_zap_caches(inode);
2745 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2747 struct nfs4_exception exception = { };
2750 err = nfs4_handle_exception(NFS_SERVER(inode),
2751 __nfs4_proc_set_acl(inode, buf, buflen),
2753 } while (exception.retry);
2758 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2760 struct nfs_client *clp = server->nfs_client;
2762 if (!clp || task->tk_status >= 0)
2764 switch(task->tk_status) {
2765 case -NFS4ERR_STALE_CLIENTID:
2766 case -NFS4ERR_STALE_STATEID:
2767 case -NFS4ERR_EXPIRED:
2768 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2769 nfs4_schedule_state_recovery(clp);
2770 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2771 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2772 task->tk_status = 0;
2774 case -NFS4ERR_DELAY:
2775 nfs_inc_server_stats((struct nfs_server *) server,
2777 case -NFS4ERR_GRACE:
2778 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2779 task->tk_status = 0;
2781 case -NFS4ERR_OLD_STATEID:
2782 task->tk_status = 0;
2785 task->tk_status = nfs4_map_errors(task->tk_status);
2789 static int nfs4_wait_bit_killable(void *word)
2791 if (fatal_signal_pending(current))
2792 return -ERESTARTSYS;
2797 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2803 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2805 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2806 nfs4_wait_bit_killable, TASK_KILLABLE);
2808 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2812 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2819 *timeout = NFS4_POLL_RETRY_MIN;
2820 if (*timeout > NFS4_POLL_RETRY_MAX)
2821 *timeout = NFS4_POLL_RETRY_MAX;
2822 schedule_timeout_killable(*timeout);
2823 if (fatal_signal_pending(current))
2829 /* This is the error handling routine for processes that are allowed
2832 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2834 struct nfs_client *clp = server->nfs_client;
2835 int ret = errorcode;
2837 exception->retry = 0;
2841 case -NFS4ERR_STALE_CLIENTID:
2842 case -NFS4ERR_STALE_STATEID:
2843 case -NFS4ERR_EXPIRED:
2844 nfs4_schedule_state_recovery(clp);
2845 ret = nfs4_wait_clnt_recover(server->client, clp);
2847 exception->retry = 1;
2849 case -NFS4ERR_FILE_OPEN:
2850 case -NFS4ERR_GRACE:
2851 case -NFS4ERR_DELAY:
2852 ret = nfs4_delay(server->client, &exception->timeout);
2855 case -NFS4ERR_OLD_STATEID:
2856 exception->retry = 1;
2858 /* We failed to handle the error */
2859 return nfs4_map_errors(ret);
2862 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2864 nfs4_verifier sc_verifier;
2865 struct nfs4_setclientid setclientid = {
2866 .sc_verifier = &sc_verifier,
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2871 .rpc_argp = &setclientid,
2879 p = (__be32*)sc_verifier.data;
2880 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2881 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2884 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2885 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2887 rpc_peeraddr2str(clp->cl_rpcclient,
2889 rpc_peeraddr2str(clp->cl_rpcclient,
2891 cred->cr_ops->cr_name,
2892 clp->cl_id_uniquifier);
2893 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2894 sizeof(setclientid.sc_netid),
2895 rpc_peeraddr2str(clp->cl_rpcclient,
2896 RPC_DISPLAY_NETID));
2897 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2898 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2899 clp->cl_ipaddr, port >> 8, port & 255);
2901 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2902 if (status != -NFS4ERR_CLID_INUSE)
2907 ssleep(clp->cl_lease_time + 1);
2909 if (++clp->cl_id_uniquifier == 0)
2915 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2917 struct nfs_fsinfo fsinfo;
2918 struct rpc_message msg = {
2919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2921 .rpc_resp = &fsinfo,
2928 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2930 spin_lock(&clp->cl_lock);
2931 clp->cl_lease_time = fsinfo.lease_time * HZ;
2932 clp->cl_last_renewal = now;
2933 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2934 spin_unlock(&clp->cl_lock);
2939 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2944 err = _nfs4_proc_setclientid_confirm(clp, cred);
2948 case -NFS4ERR_RESOURCE:
2949 /* The IBM lawyers misread another document! */
2950 case -NFS4ERR_DELAY:
2951 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2957 struct nfs4_delegreturndata {
2958 struct nfs4_delegreturnargs args;
2959 struct nfs4_delegreturnres res;
2961 nfs4_stateid stateid;
2962 unsigned long timestamp;
2963 struct nfs_fattr fattr;
2967 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2969 struct nfs4_delegreturndata *data = calldata;
2970 data->rpc_status = task->tk_status;
2971 if (data->rpc_status == 0)
2972 renew_lease(data->res.server, data->timestamp);
2975 static void nfs4_delegreturn_release(void *calldata)
2980 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2981 .rpc_call_done = nfs4_delegreturn_done,
2982 .rpc_release = nfs4_delegreturn_release,
2985 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
2987 struct nfs4_delegreturndata *data;
2988 struct nfs_server *server = NFS_SERVER(inode);
2989 struct rpc_task *task;
2990 struct rpc_message msg = {
2991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2994 struct rpc_task_setup task_setup_data = {
2995 .rpc_client = server->client,
2996 .rpc_message = &msg,
2997 .callback_ops = &nfs4_delegreturn_ops,
2998 .flags = RPC_TASK_ASYNC,
3002 data = kmalloc(sizeof(*data), GFP_KERNEL);
3005 data->args.fhandle = &data->fh;
3006 data->args.stateid = &data->stateid;
3007 data->args.bitmask = server->attr_bitmask;
3008 nfs_copy_fh(&data->fh, NFS_FH(inode));
3009 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3010 data->res.fattr = &data->fattr;
3011 data->res.server = server;
3012 nfs_fattr_init(data->res.fattr);
3013 data->timestamp = jiffies;
3014 data->rpc_status = 0;
3016 task_setup_data.callback_data = data;
3017 msg.rpc_argp = &data->args,
3018 msg.rpc_resp = &data->res,
3019 task = rpc_run_task(&task_setup_data);
3021 return PTR_ERR(task);
3024 status = nfs4_wait_for_completion_rpc_task(task);
3027 status = data->rpc_status;
3030 nfs_refresh_inode(inode, &data->fattr);
3036 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3038 struct nfs_server *server = NFS_SERVER(inode);
3039 struct nfs4_exception exception = { };
3042 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3044 case -NFS4ERR_STALE_STATEID:
3045 case -NFS4ERR_EXPIRED:
3049 err = nfs4_handle_exception(server, err, &exception);
3050 } while (exception.retry);
3054 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3055 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3058 * sleep, with exponential backoff, and retry the LOCK operation.
3060 static unsigned long
3061 nfs4_set_lock_task_retry(unsigned long timeout)
3063 schedule_timeout_killable(timeout);
3065 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3066 return NFS4_LOCK_MAXTIMEOUT;
3070 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3072 struct inode *inode = state->inode;
3073 struct nfs_server *server = NFS_SERVER(inode);
3074 struct nfs_client *clp = server->nfs_client;
3075 struct nfs_lockt_args arg = {
3076 .fh = NFS_FH(inode),
3079 struct nfs_lockt_res res = {
3082 struct rpc_message msg = {
3083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3086 .rpc_cred = state->owner->so_cred,
3088 struct nfs4_lock_state *lsp;
3091 down_read(&clp->cl_sem);
3092 arg.lock_owner.clientid = clp->cl_clientid;
3093 status = nfs4_set_lock_state(state, request);
3096 lsp = request->fl_u.nfs4_fl.owner;
3097 arg.lock_owner.id = lsp->ls_id.id;
3098 status = rpc_call_sync(server->client, &msg, 0);
3101 request->fl_type = F_UNLCK;
3103 case -NFS4ERR_DENIED:
3106 request->fl_ops->fl_release_private(request);
3108 up_read(&clp->cl_sem);
3112 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3114 struct nfs4_exception exception = { };
3118 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3119 _nfs4_proc_getlk(state, cmd, request),
3121 } while (exception.retry);
3125 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3128 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3130 res = posix_lock_file_wait(file, fl);
3133 res = flock_lock_file_wait(file, fl);
3141 struct nfs4_unlockdata {
3142 struct nfs_locku_args arg;
3143 struct nfs_locku_res res;
3144 struct nfs4_lock_state *lsp;
3145 struct nfs_open_context *ctx;
3146 struct file_lock fl;
3147 const struct nfs_server *server;
3148 unsigned long timestamp;
3151 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3152 struct nfs_open_context *ctx,
3153 struct nfs4_lock_state *lsp,
3154 struct nfs_seqid *seqid)
3156 struct nfs4_unlockdata *p;
3157 struct inode *inode = lsp->ls_state->inode;
3159 p = kmalloc(sizeof(*p), GFP_KERNEL);
3162 p->arg.fh = NFS_FH(inode);
3164 p->arg.seqid = seqid;
3165 p->arg.stateid = &lsp->ls_stateid;
3167 atomic_inc(&lsp->ls_count);
3168 /* Ensure we don't close file until we're done freeing locks! */
3169 p->ctx = get_nfs_open_context(ctx);
3170 memcpy(&p->fl, fl, sizeof(p->fl));
3171 p->server = NFS_SERVER(inode);
3175 static void nfs4_locku_release_calldata(void *data)
3177 struct nfs4_unlockdata *calldata = data;
3178 nfs_free_seqid(calldata->arg.seqid);
3179 nfs4_put_lock_state(calldata->lsp);
3180 put_nfs_open_context(calldata->ctx);
3184 static void nfs4_locku_done(struct rpc_task *task, void *data)
3186 struct nfs4_unlockdata *calldata = data;
3188 if (RPC_ASSASSINATED(task))
3190 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3191 switch (task->tk_status) {
3193 memcpy(calldata->lsp->ls_stateid.data,
3194 calldata->res.stateid.data,
3195 sizeof(calldata->lsp->ls_stateid.data));
3196 renew_lease(calldata->server, calldata->timestamp);
3198 case -NFS4ERR_STALE_STATEID:
3199 case -NFS4ERR_EXPIRED:
3202 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3203 rpc_restart_call(task);
3207 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3209 struct nfs4_unlockdata *calldata = data;
3211 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3213 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3214 /* Note: exit _without_ running nfs4_locku_done */
3215 task->tk_action = NULL;
3218 calldata->timestamp = jiffies;
3219 rpc_call_start(task);
3222 static const struct rpc_call_ops nfs4_locku_ops = {
3223 .rpc_call_prepare = nfs4_locku_prepare,
3224 .rpc_call_done = nfs4_locku_done,
3225 .rpc_release = nfs4_locku_release_calldata,
3228 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3229 struct nfs_open_context *ctx,
3230 struct nfs4_lock_state *lsp,
3231 struct nfs_seqid *seqid)
3233 struct nfs4_unlockdata *data;
3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3236 .rpc_cred = ctx->cred,
3238 struct rpc_task_setup task_setup_data = {
3239 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3240 .rpc_message = &msg,
3241 .callback_ops = &nfs4_locku_ops,
3242 .workqueue = nfsiod_workqueue,
3243 .flags = RPC_TASK_ASYNC,
3246 /* Ensure this is an unlock - when canceling a lock, the
3247 * canceled lock is passed in, and it won't be an unlock.
3249 fl->fl_type = F_UNLCK;
3251 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3253 nfs_free_seqid(seqid);
3254 return ERR_PTR(-ENOMEM);
3257 msg.rpc_argp = &data->arg,
3258 msg.rpc_resp = &data->res,
3259 task_setup_data.callback_data = data;
3260 return rpc_run_task(&task_setup_data);
3263 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3265 struct nfs_seqid *seqid;
3266 struct nfs4_lock_state *lsp;
3267 struct rpc_task *task;
3270 status = nfs4_set_lock_state(state, request);
3271 /* Unlock _before_ we do the RPC call */
3272 request->fl_flags |= FL_EXISTS;
3273 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3277 /* Is this a delegated lock? */
3278 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3280 lsp = request->fl_u.nfs4_fl.owner;
3281 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3285 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3286 status = PTR_ERR(task);
3289 status = nfs4_wait_for_completion_rpc_task(task);
3295 struct nfs4_lockdata {
3296 struct nfs_lock_args arg;
3297 struct nfs_lock_res res;
3298 struct nfs4_lock_state *lsp;
3299 struct nfs_open_context *ctx;
3300 struct file_lock fl;
3301 unsigned long timestamp;
3306 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3307 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3309 struct nfs4_lockdata *p;
3310 struct inode *inode = lsp->ls_state->inode;
3311 struct nfs_server *server = NFS_SERVER(inode);
3313 p = kzalloc(sizeof(*p), GFP_KERNEL);
3317 p->arg.fh = NFS_FH(inode);
3319 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3320 if (p->arg.open_seqid == NULL)
3322 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3323 if (p->arg.lock_seqid == NULL)
3324 goto out_free_seqid;
3325 p->arg.lock_stateid = &lsp->ls_stateid;
3326 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3327 p->arg.lock_owner.id = lsp->ls_id.id;
3329 atomic_inc(&lsp->ls_count);
3330 p->ctx = get_nfs_open_context(ctx);
3331 memcpy(&p->fl, fl, sizeof(p->fl));
3334 nfs_free_seqid(p->arg.open_seqid);
3340 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3342 struct nfs4_lockdata *data = calldata;
3343 struct nfs4_state *state = data->lsp->ls_state;
3345 dprintk("%s: begin!\n", __FUNCTION__);
3346 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3348 /* Do we need to do an open_to_lock_owner? */
3349 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3350 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3352 data->arg.open_stateid = &state->stateid;
3353 data->arg.new_lock_owner = 1;
3355 data->arg.new_lock_owner = 0;
3356 data->timestamp = jiffies;
3357 rpc_call_start(task);
3358 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3361 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3363 struct nfs4_lockdata *data = calldata;
3365 dprintk("%s: begin!\n", __FUNCTION__);
3367 data->rpc_status = task->tk_status;
3368 if (RPC_ASSASSINATED(task))
3370 if (data->arg.new_lock_owner != 0) {
3371 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3372 if (data->rpc_status == 0)
3373 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3377 if (data->rpc_status == 0) {
3378 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3379 sizeof(data->lsp->ls_stateid.data));
3380 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3381 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3383 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3385 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3388 static void nfs4_lock_release(void *calldata)
3390 struct nfs4_lockdata *data = calldata;
3392 dprintk("%s: begin!\n", __FUNCTION__);
3393 nfs_free_seqid(data->arg.open_seqid);
3394 if (data->cancelled != 0) {
3395 struct rpc_task *task;
3396 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3397 data->arg.lock_seqid);
3400 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3402 nfs_free_seqid(data->arg.lock_seqid);
3403 nfs4_put_lock_state(data->lsp);
3404 put_nfs_open_context(data->ctx);
3406 dprintk("%s: done!\n", __FUNCTION__);
3409 static const struct rpc_call_ops nfs4_lock_ops = {
3410 .rpc_call_prepare = nfs4_lock_prepare,
3411 .rpc_call_done = nfs4_lock_done,
3412 .rpc_release = nfs4_lock_release,
3415 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3417 struct nfs4_lockdata *data;
3418 struct rpc_task *task;
3419 struct rpc_message msg = {
3420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3421 .rpc_cred = state->owner->so_cred,
3423 struct rpc_task_setup task_setup_data = {
3424 .rpc_client = NFS_CLIENT(state->inode),
3425 .rpc_message = &msg,
3426 .callback_ops = &nfs4_lock_ops,
3427 .workqueue = nfsiod_workqueue,
3428 .flags = RPC_TASK_ASYNC,
3432 dprintk("%s: begin!\n", __FUNCTION__);
3433 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3434 fl->fl_u.nfs4_fl.owner);
3438 data->arg.block = 1;
3440 data->arg.reclaim = 1;
3441 msg.rpc_argp = &data->arg,
3442 msg.rpc_resp = &data->res,
3443 task_setup_data.callback_data = data;
3444 task = rpc_run_task(&task_setup_data);
3446 return PTR_ERR(task);
3447 ret = nfs4_wait_for_completion_rpc_task(task);
3449 ret = data->rpc_status;
3450 if (ret == -NFS4ERR_DENIED)
3453 data->cancelled = 1;
3455 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3459 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3461 struct nfs_server *server = NFS_SERVER(state->inode);
3462 struct nfs4_exception exception = { };
3466 /* Cache the lock if possible... */
3467 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3469 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3470 if (err != -NFS4ERR_DELAY)
3472 nfs4_handle_exception(server, err, &exception);
3473 } while (exception.retry);
3477 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3479 struct nfs_server *server = NFS_SERVER(state->inode);
3480 struct nfs4_exception exception = { };
3483 err = nfs4_set_lock_state(state, request);
3487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3489 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3490 if (err != -NFS4ERR_DELAY)
3492 nfs4_handle_exception(server, err, &exception);
3493 } while (exception.retry);
3497 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3499 struct nfs_client *clp = state->owner->so_client;
3500 unsigned char fl_flags = request->fl_flags;
3503 /* Is this a delegated open? */
3504 status = nfs4_set_lock_state(state, request);
3507 request->fl_flags |= FL_ACCESS;
3508 status = do_vfs_lock(request->fl_file, request);
3511 down_read(&clp->cl_sem);
3512 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3513 struct nfs_inode *nfsi = NFS_I(state->inode);
3514 /* Yes: cache locks! */
3515 down_read(&nfsi->rwsem);
3516 /* ...but avoid races with delegation recall... */
3517 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3518 request->fl_flags = fl_flags & ~FL_SLEEP;
3519 status = do_vfs_lock(request->fl_file, request);
3520 up_read(&nfsi->rwsem);
3523 up_read(&nfsi->rwsem);
3525 status = _nfs4_do_setlk(state, cmd, request, 0);
3528 /* Note: we always want to sleep here! */
3529 request->fl_flags = fl_flags | FL_SLEEP;
3530 if (do_vfs_lock(request->fl_file, request) < 0)
3531 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3533 up_read(&clp->cl_sem);
3535 request->fl_flags = fl_flags;
3539 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3541 struct nfs4_exception exception = { };
3545 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3546 _nfs4_proc_setlk(state, cmd, request),
3548 } while (exception.retry);
3553 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3555 struct nfs_open_context *ctx;
3556 struct nfs4_state *state;
3557 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3560 /* verify open state */
3561 ctx = nfs_file_open_context(filp);
3564 if (request->fl_start < 0 || request->fl_end < 0)
3568 return nfs4_proc_getlk(state, F_GETLK, request);
3570 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3573 if (request->fl_type == F_UNLCK)
3574 return nfs4_proc_unlck(state, cmd, request);
3577 status = nfs4_proc_setlk(state, cmd, request);
3578 if ((status != -EAGAIN) || IS_SETLK(cmd))
3580 timeout = nfs4_set_lock_task_retry(timeout);
3581 status = -ERESTARTSYS;
3584 } while(status < 0);
3588 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3590 struct nfs_server *server = NFS_SERVER(state->inode);
3591 struct nfs4_exception exception = { };
3594 err = nfs4_set_lock_state(state, fl);
3598 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3599 if (err != -NFS4ERR_DELAY)
3601 err = nfs4_handle_exception(server, err, &exception);
3602 } while (exception.retry);
3607 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3609 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3610 size_t buflen, int flags)
3612 struct inode *inode = dentry->d_inode;
3614 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3617 return nfs4_proc_set_acl(inode, buf, buflen);
3620 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3621 * and that's what we'll do for e.g. user attributes that haven't been set.
3622 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3623 * attributes in kernel-managed attribute namespaces. */
3624 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3627 struct inode *inode = dentry->d_inode;
3629 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3632 return nfs4_proc_get_acl(inode, buf, buflen);
3635 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3637 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3639 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3641 if (buf && buflen < len)
3644 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3648 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3649 struct nfs4_fs_locations *fs_locations, struct page *page)
3651 struct nfs_server *server = NFS_SERVER(dir);
3653 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3654 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3656 struct nfs4_fs_locations_arg args = {
3657 .dir_fh = NFS_FH(dir),
3662 struct rpc_message msg = {
3663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3665 .rpc_resp = fs_locations,
3669 dprintk("%s: start\n", __FUNCTION__);
3670 nfs_fattr_init(&fs_locations->fattr);
3671 fs_locations->server = server;
3672 fs_locations->nlocations = 0;
3673 status = rpc_call_sync(server->client, &msg, 0);
3674 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3678 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3679 .recover_open = nfs4_open_reclaim,
3680 .recover_lock = nfs4_lock_reclaim,
3683 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3684 .recover_open = nfs4_open_expired,
3685 .recover_lock = nfs4_lock_expired,
3688 static const struct inode_operations nfs4_file_inode_operations = {
3689 .permission = nfs_permission,
3690 .getattr = nfs_getattr,
3691 .setattr = nfs_setattr,
3692 .getxattr = nfs4_getxattr,
3693 .setxattr = nfs4_setxattr,
3694 .listxattr = nfs4_listxattr,
3697 const struct nfs_rpc_ops nfs_v4_clientops = {
3698 .version = 4, /* protocol version */
3699 .dentry_ops = &nfs4_dentry_operations,
3700 .dir_inode_ops = &nfs4_dir_inode_operations,
3701 .file_inode_ops = &nfs4_file_inode_operations,
3702 .getroot = nfs4_proc_get_root,
3703 .getattr = nfs4_proc_getattr,
3704 .setattr = nfs4_proc_setattr,
3705 .lookupfh = nfs4_proc_lookupfh,
3706 .lookup = nfs4_proc_lookup,
3707 .access = nfs4_proc_access,
3708 .readlink = nfs4_proc_readlink,
3709 .create = nfs4_proc_create,
3710 .remove = nfs4_proc_remove,
3711 .unlink_setup = nfs4_proc_unlink_setup,
3712 .unlink_done = nfs4_proc_unlink_done,
3713 .rename = nfs4_proc_rename,
3714 .link = nfs4_proc_link,
3715 .symlink = nfs4_proc_symlink,
3716 .mkdir = nfs4_proc_mkdir,
3717 .rmdir = nfs4_proc_remove,
3718 .readdir = nfs4_proc_readdir,
3719 .mknod = nfs4_proc_mknod,
3720 .statfs = nfs4_proc_statfs,
3721 .fsinfo = nfs4_proc_fsinfo,
3722 .pathconf = nfs4_proc_pathconf,
3723 .set_capabilities = nfs4_server_capabilities,
3724 .decode_dirent = nfs4_decode_dirent,
3725 .read_setup = nfs4_proc_read_setup,
3726 .read_done = nfs4_read_done,
3727 .write_setup = nfs4_proc_write_setup,
3728 .write_done = nfs4_write_done,
3729 .commit_setup = nfs4_proc_commit_setup,
3730 .commit_done = nfs4_commit_done,
3731 .file_open = nfs_open,
3732 .file_release = nfs_release,
3733 .lock = nfs4_proc_lock,
3734 .clear_acl_cache = nfs4_zap_acl_attr,